Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Kendrick Smith <kmsmith@umich.edu> |
| 6 | * Andy Adamson <kandros@umich.edu> |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. Neither the name of the University nor the names of its |
| 18 | * contributors may be used to endorse or promote products derived |
| 19 | * from this software without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | * |
| 33 | */ |
| 34 | |
Dave Hansen | aceaf78 | 2008-02-15 14:37:31 -0800 | [diff] [blame] | 35 | #include <linux/file.h> |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 36 | #include <linux/fs.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 37 | #include <linux/slab.h> |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 38 | #include <linux/namei.h> |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 39 | #include <linux/swap.h> |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 40 | #include <linux/pagemap.h> |
Chuck Lever | 7df302f | 2012-05-29 13:56:37 -0400 | [diff] [blame] | 41 | #include <linux/ratelimit.h> |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 42 | #include <linux/sunrpc/svcauth_gss.h> |
Jeff Layton | 5976687 | 2013-02-04 12:50:00 -0500 | [diff] [blame] | 43 | #include <linux/sunrpc/addr.h> |
Daniel Borkmann | 8754589 | 2014-12-10 16:33:11 +0100 | [diff] [blame] | 44 | #include <linux/jhash.h> |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 45 | #include "xdr4.h" |
J. Bruce Fields | 06b332a | 2013-04-09 11:34:36 -0400 | [diff] [blame] | 46 | #include "xdr4cb.h" |
J. Bruce Fields | 0a3adad | 2009-11-04 18:12:35 -0500 | [diff] [blame] | 47 | #include "vfs.h" |
J. Bruce Fields | bfa4b36 | 2012-04-25 16:49:18 -0400 | [diff] [blame] | 48 | #include "current_stateid.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Stanislav Kinsbursky | 5e1533c | 2012-07-25 16:56:58 +0400 | [diff] [blame] | 50 | #include "netns.h" |
Christoph Hellwig | 9cf514c | 2014-05-05 13:11:59 +0200 | [diff] [blame] | 51 | #include "pnfs.h" |
Stanislav Kinsbursky | 5e1533c | 2012-07-25 16:56:58 +0400 | [diff] [blame] | 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
| 54 | |
J. Bruce Fields | f32f3c2 | 2011-12-12 15:00:35 -0500 | [diff] [blame] | 55 | #define all_ones {{~0,~0},~0} |
| 56 | static const stateid_t one_stateid = { |
| 57 | .si_generation = ~0, |
| 58 | .si_opaque = all_ones, |
| 59 | }; |
| 60 | static const stateid_t zero_stateid = { |
| 61 | /* all fields zero */ |
| 62 | }; |
Tigran Mkrtchyan | 19ff0f2 | 2012-02-13 22:55:23 +0100 | [diff] [blame] | 63 | static const stateid_t currentstateid = { |
| 64 | .si_generation = 1, |
| 65 | }; |
J. Bruce Fields | f32f3c2 | 2011-12-12 15:00:35 -0500 | [diff] [blame] | 66 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 67 | static u64 current_sessionid = 1; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 68 | |
J. Bruce Fields | f32f3c2 | 2011-12-12 15:00:35 -0500 | [diff] [blame] | 69 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
| 70 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) |
Tigran Mkrtchyan | 19ff0f2 | 2012-02-13 22:55:23 +0100 | [diff] [blame] | 71 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | /* forward declarations */ |
Jeff Layton | f9c00c3 | 2014-07-23 16:17:41 -0400 | [diff] [blame] | 74 | static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 75 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 77 | /* Locking: */ |
| 78 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 79 | /* |
| 80 | * Currently used for the del_recall_lru and file hash table. In an |
| 81 | * effort to decrease the scope of the client_mutex, this spinlock may |
| 82 | * eventually cover more: |
| 83 | */ |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 84 | static DEFINE_SPINLOCK(state_lock); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 85 | |
Jeff Layton | b401be22 | 2014-07-29 21:34:33 -0400 | [diff] [blame] | 86 | /* |
| 87 | * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for |
| 88 | * the refcount on the open stateid to drop. |
| 89 | */ |
| 90 | static DECLARE_WAIT_QUEUE_HEAD(close_wq); |
| 91 | |
Christoph Hellwig | abf1135 | 2014-05-21 07:43:03 -0700 | [diff] [blame] | 92 | static struct kmem_cache *openowner_slab; |
| 93 | static struct kmem_cache *lockowner_slab; |
| 94 | static struct kmem_cache *file_slab; |
| 95 | static struct kmem_cache *stateid_slab; |
| 96 | static struct kmem_cache *deleg_slab; |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 97 | static struct kmem_cache *odstate_slab; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 98 | |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 99 | static void free_session(struct nfsd4_session *); |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 100 | |
Julia Lawall | c4cb897 | 2015-11-21 22:57:39 +0100 | [diff] [blame] | 101 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops; |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 102 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops; |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 103 | |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 104 | static bool is_session_dead(struct nfsd4_session *ses) |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 105 | { |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 106 | return ses->se_flags & NFS4_SESSION_DEAD; |
| 107 | } |
| 108 | |
J. Bruce Fields | f0f51f5 | 2013-06-18 14:26:02 -0400 | [diff] [blame] | 109 | static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) |
| 110 | { |
| 111 | if (atomic_read(&ses->se_ref) > ref_held_by_me) |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 112 | return nfserr_jukebox; |
| 113 | ses->se_flags |= NFS4_SESSION_DEAD; |
| 114 | return nfs_ok; |
| 115 | } |
| 116 | |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 117 | static bool is_client_expired(struct nfs4_client *clp) |
| 118 | { |
| 119 | return clp->cl_time == 0; |
| 120 | } |
| 121 | |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 122 | static __be32 get_client_locked(struct nfs4_client *clp) |
| 123 | { |
Trond Myklebust | 0a880a2 | 2014-07-30 08:27:10 -0400 | [diff] [blame] | 124 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
| 125 | |
| 126 | lockdep_assert_held(&nn->client_lock); |
| 127 | |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 128 | if (is_client_expired(clp)) |
| 129 | return nfserr_expired; |
| 130 | atomic_inc(&clp->cl_refcount); |
| 131 | return nfs_ok; |
| 132 | } |
| 133 | |
| 134 | /* must be called under the client_lock */ |
| 135 | static inline void |
| 136 | renew_client_locked(struct nfs4_client *clp) |
| 137 | { |
| 138 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
| 139 | |
| 140 | if (is_client_expired(clp)) { |
| 141 | WARN_ON(1); |
| 142 | printk("%s: client (clientid %08x/%08x) already expired\n", |
| 143 | __func__, |
| 144 | clp->cl_clientid.cl_boot, |
| 145 | clp->cl_clientid.cl_id); |
| 146 | return; |
| 147 | } |
| 148 | |
| 149 | dprintk("renewing client (clientid %08x/%08x)\n", |
| 150 | clp->cl_clientid.cl_boot, |
| 151 | clp->cl_clientid.cl_id); |
| 152 | list_move_tail(&clp->cl_lru, &nn->client_lru); |
| 153 | clp->cl_time = get_seconds(); |
| 154 | } |
| 155 | |
Fengguang Wu | ba13843 | 2013-04-16 22:14:15 -0400 | [diff] [blame] | 156 | static void put_client_renew_locked(struct nfs4_client *clp) |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 157 | { |
Trond Myklebust | 0a880a2 | 2014-07-30 08:27:10 -0400 | [diff] [blame] | 158 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
| 159 | |
| 160 | lockdep_assert_held(&nn->client_lock); |
| 161 | |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 162 | if (!atomic_dec_and_test(&clp->cl_refcount)) |
| 163 | return; |
| 164 | if (!is_client_expired(clp)) |
| 165 | renew_client_locked(clp); |
| 166 | } |
| 167 | |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 168 | static void put_client_renew(struct nfs4_client *clp) |
| 169 | { |
| 170 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
| 171 | |
Jeff Layton | d6c249b | 2014-07-08 14:02:50 -0400 | [diff] [blame] | 172 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
| 173 | return; |
| 174 | if (!is_client_expired(clp)) |
| 175 | renew_client_locked(clp); |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 176 | spin_unlock(&nn->client_lock); |
| 177 | } |
| 178 | |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 179 | static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) |
| 180 | { |
| 181 | __be32 status; |
| 182 | |
| 183 | if (is_session_dead(ses)) |
| 184 | return nfserr_badsession; |
| 185 | status = get_client_locked(ses->se_client); |
| 186 | if (status) |
| 187 | return status; |
| 188 | atomic_inc(&ses->se_ref); |
| 189 | return nfs_ok; |
| 190 | } |
| 191 | |
| 192 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) |
| 193 | { |
| 194 | struct nfs4_client *clp = ses->se_client; |
Trond Myklebust | 0a880a2 | 2014-07-30 08:27:10 -0400 | [diff] [blame] | 195 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
| 196 | |
| 197 | lockdep_assert_held(&nn->client_lock); |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 198 | |
| 199 | if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) |
| 200 | free_session(ses); |
| 201 | put_client_renew_locked(clp); |
| 202 | } |
| 203 | |
| 204 | static void nfsd4_put_session(struct nfsd4_session *ses) |
| 205 | { |
| 206 | struct nfs4_client *clp = ses->se_client; |
| 207 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
| 208 | |
| 209 | spin_lock(&nn->client_lock); |
| 210 | nfsd4_put_session_locked(ses); |
| 211 | spin_unlock(&nn->client_lock); |
| 212 | } |
| 213 | |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 214 | static struct nfsd4_blocked_lock * |
| 215 | find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, |
| 216 | struct nfsd_net *nn) |
| 217 | { |
| 218 | struct nfsd4_blocked_lock *cur, *found = NULL; |
| 219 | |
Jeff Layton | 0cc11a6 | 2016-10-20 09:34:31 -0400 | [diff] [blame] | 220 | spin_lock(&nn->blocked_locks_lock); |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 221 | list_for_each_entry(cur, &lo->lo_blocked, nbl_list) { |
| 222 | if (fh_match(fh, &cur->nbl_fh)) { |
| 223 | list_del_init(&cur->nbl_list); |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 224 | list_del_init(&cur->nbl_lru); |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 225 | found = cur; |
| 226 | break; |
| 227 | } |
| 228 | } |
Jeff Layton | 0cc11a6 | 2016-10-20 09:34:31 -0400 | [diff] [blame] | 229 | spin_unlock(&nn->blocked_locks_lock); |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 230 | if (found) |
| 231 | posix_unblock_lock(&found->nbl_lock); |
| 232 | return found; |
| 233 | } |
| 234 | |
| 235 | static struct nfsd4_blocked_lock * |
| 236 | find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh, |
| 237 | struct nfsd_net *nn) |
| 238 | { |
| 239 | struct nfsd4_blocked_lock *nbl; |
| 240 | |
| 241 | nbl = find_blocked_lock(lo, fh, nn); |
| 242 | if (!nbl) { |
| 243 | nbl= kmalloc(sizeof(*nbl), GFP_KERNEL); |
| 244 | if (nbl) { |
| 245 | fh_copy_shallow(&nbl->nbl_fh, fh); |
| 246 | locks_init_lock(&nbl->nbl_lock); |
| 247 | nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client, |
| 248 | &nfsd4_cb_notify_lock_ops, |
| 249 | NFSPROC4_CLNT_CB_NOTIFY_LOCK); |
| 250 | } |
| 251 | } |
| 252 | return nbl; |
| 253 | } |
| 254 | |
| 255 | static void |
| 256 | free_blocked_lock(struct nfsd4_blocked_lock *nbl) |
| 257 | { |
| 258 | locks_release_private(&nbl->nbl_lock); |
| 259 | kfree(nbl); |
| 260 | } |
| 261 | |
| 262 | static int |
| 263 | nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) |
| 264 | { |
| 265 | /* |
| 266 | * Since this is just an optimization, we don't try very hard if it |
| 267 | * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and |
| 268 | * just quit trying on anything else. |
| 269 | */ |
| 270 | switch (task->tk_status) { |
| 271 | case -NFS4ERR_DELAY: |
| 272 | rpc_delay(task, 1 * HZ); |
| 273 | return 0; |
| 274 | default: |
| 275 | return 1; |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | static void |
| 280 | nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) |
| 281 | { |
| 282 | struct nfsd4_blocked_lock *nbl = container_of(cb, |
| 283 | struct nfsd4_blocked_lock, nbl_cb); |
| 284 | |
| 285 | free_blocked_lock(nbl); |
| 286 | } |
| 287 | |
| 288 | static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { |
| 289 | .done = nfsd4_cb_notify_lock_done, |
| 290 | .release = nfsd4_cb_notify_lock_release, |
| 291 | }; |
| 292 | |
Kinglong Mee | b5971af | 2014-08-22 10:18:43 -0400 | [diff] [blame] | 293 | static inline struct nfs4_stateowner * |
| 294 | nfs4_get_stateowner(struct nfs4_stateowner *sop) |
| 295 | { |
| 296 | atomic_inc(&sop->so_count); |
| 297 | return sop; |
| 298 | } |
| 299 | |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 300 | static int |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 301 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 302 | { |
| 303 | return (sop->so_owner.len == owner->len) && |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 304 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len); |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 305 | } |
| 306 | |
| 307 | static struct nfs4_openowner * |
| 308 | find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 309 | struct nfs4_client *clp) |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 310 | { |
| 311 | struct nfs4_stateowner *so; |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 312 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 313 | lockdep_assert_held(&clp->cl_lock); |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 314 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 315 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], |
| 316 | so_strhash) { |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 317 | if (!so->so_is_open_owner) |
| 318 | continue; |
Kinglong Mee | b5971af | 2014-08-22 10:18:43 -0400 | [diff] [blame] | 319 | if (same_owner_str(so, &open->op_owner)) |
| 320 | return openowner(nfs4_get_stateowner(so)); |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 321 | } |
| 322 | return NULL; |
| 323 | } |
| 324 | |
| 325 | static struct nfs4_openowner * |
| 326 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 327 | struct nfs4_client *clp) |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 328 | { |
| 329 | struct nfs4_openowner *oo; |
| 330 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 331 | spin_lock(&clp->cl_lock); |
| 332 | oo = find_openstateowner_str_locked(hashval, open, clp); |
| 333 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 334 | return oo; |
| 335 | } |
| 336 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | static inline u32 |
| 338 | opaque_hashval(const void *ptr, int nbytes) |
| 339 | { |
| 340 | unsigned char *cptr = (unsigned char *) ptr; |
| 341 | |
| 342 | u32 x = 0; |
| 343 | while (nbytes--) { |
| 344 | x *= 37; |
| 345 | x += *cptr++; |
| 346 | } |
| 347 | return x; |
| 348 | } |
| 349 | |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 350 | static void nfsd4_free_file_rcu(struct rcu_head *rcu) |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 351 | { |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 352 | struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); |
| 353 | |
| 354 | kmem_cache_free(file_slab, fp); |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 355 | } |
| 356 | |
Christoph Hellwig | e6ba76e | 2014-08-14 08:50:16 +0200 | [diff] [blame] | 357 | void |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 358 | put_nfs4_file(struct nfs4_file *fi) |
| 359 | { |
Jeff Layton | 02e1215 | 2014-07-16 10:31:57 -0400 | [diff] [blame] | 360 | might_lock(&state_lock); |
| 361 | |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 362 | if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 363 | hlist_del_rcu(&fi->fi_hash); |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 364 | spin_unlock(&state_lock); |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 365 | WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 366 | WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); |
| 367 | call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 368 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 369 | } |
| 370 | |
Trond Myklebust | de18643 | 2014-07-10 14:07:26 -0400 | [diff] [blame] | 371 | static struct file * |
| 372 | __nfs4_get_fd(struct nfs4_file *f, int oflag) |
| 373 | { |
| 374 | if (f->fi_fds[oflag]) |
| 375 | return get_file(f->fi_fds[oflag]); |
| 376 | return NULL; |
| 377 | } |
| 378 | |
| 379 | static struct file * |
| 380 | find_writeable_file_locked(struct nfs4_file *f) |
| 381 | { |
| 382 | struct file *ret; |
| 383 | |
| 384 | lockdep_assert_held(&f->fi_lock); |
| 385 | |
| 386 | ret = __nfs4_get_fd(f, O_WRONLY); |
| 387 | if (!ret) |
| 388 | ret = __nfs4_get_fd(f, O_RDWR); |
| 389 | return ret; |
| 390 | } |
| 391 | |
| 392 | static struct file * |
| 393 | find_writeable_file(struct nfs4_file *f) |
| 394 | { |
| 395 | struct file *ret; |
| 396 | |
| 397 | spin_lock(&f->fi_lock); |
| 398 | ret = find_writeable_file_locked(f); |
| 399 | spin_unlock(&f->fi_lock); |
| 400 | |
| 401 | return ret; |
| 402 | } |
| 403 | |
| 404 | static struct file *find_readable_file_locked(struct nfs4_file *f) |
| 405 | { |
| 406 | struct file *ret; |
| 407 | |
| 408 | lockdep_assert_held(&f->fi_lock); |
| 409 | |
| 410 | ret = __nfs4_get_fd(f, O_RDONLY); |
| 411 | if (!ret) |
| 412 | ret = __nfs4_get_fd(f, O_RDWR); |
| 413 | return ret; |
| 414 | } |
| 415 | |
| 416 | static struct file * |
| 417 | find_readable_file(struct nfs4_file *f) |
| 418 | { |
| 419 | struct file *ret; |
| 420 | |
| 421 | spin_lock(&f->fi_lock); |
| 422 | ret = find_readable_file_locked(f); |
| 423 | spin_unlock(&f->fi_lock); |
| 424 | |
| 425 | return ret; |
| 426 | } |
| 427 | |
Christoph Hellwig | 4d227fc | 2014-08-17 07:40:00 -0500 | [diff] [blame] | 428 | struct file * |
Trond Myklebust | de18643 | 2014-07-10 14:07:26 -0400 | [diff] [blame] | 429 | find_any_file(struct nfs4_file *f) |
| 430 | { |
| 431 | struct file *ret; |
| 432 | |
| 433 | spin_lock(&f->fi_lock); |
| 434 | ret = __nfs4_get_fd(f, O_RDWR); |
| 435 | if (!ret) { |
| 436 | ret = __nfs4_get_fd(f, O_WRONLY); |
| 437 | if (!ret) |
| 438 | ret = __nfs4_get_fd(f, O_RDONLY); |
| 439 | } |
| 440 | spin_unlock(&f->fi_lock); |
| 441 | return ret; |
| 442 | } |
| 443 | |
Trond Myklebust | 02a3508 | 2014-07-25 07:34:22 -0400 | [diff] [blame] | 444 | static atomic_long_t num_delegations; |
Zhang Yanfei | 697ce9b | 2013-02-22 16:35:47 -0800 | [diff] [blame] | 445 | unsigned long max_delegations; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 446 | |
| 447 | /* |
| 448 | * Open owner state (share locks) |
| 449 | */ |
| 450 | |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 451 | /* hash tables for lock and open owners */ |
| 452 | #define OWNER_HASH_BITS 8 |
| 453 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) |
| 454 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 455 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 456 | static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) |
J. Bruce Fields | ddc04c4 | 2011-07-30 23:46:29 -0400 | [diff] [blame] | 457 | { |
| 458 | unsigned int ret; |
| 459 | |
| 460 | ret = opaque_hashval(ownername->data, ownername->len); |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 461 | return ret & OWNER_HASH_MASK; |
J. Bruce Fields | ddc04c4 | 2011-07-30 23:46:29 -0400 | [diff] [blame] | 462 | } |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 463 | |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 464 | /* hash table for nfs4_file */ |
| 465 | #define FILE_HASH_BITS 8 |
| 466 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) |
Shan Wei | 3507958 | 2011-01-14 17:35:59 +0800 | [diff] [blame] | 467 | |
Trond Myklebust | ca94321 | 2014-07-23 16:17:39 -0400 | [diff] [blame] | 468 | static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) |
J. Bruce Fields | ddc04c4 | 2011-07-30 23:46:29 -0400 | [diff] [blame] | 469 | { |
Trond Myklebust | ca94321 | 2014-07-23 16:17:39 -0400 | [diff] [blame] | 470 | return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); |
| 471 | } |
| 472 | |
| 473 | static unsigned int file_hashval(struct knfsd_fh *fh) |
| 474 | { |
| 475 | return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); |
| 476 | } |
| 477 | |
Jeff Layton | 89876f8 | 2013-04-02 09:01:59 -0400 | [diff] [blame] | 478 | static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 479 | |
Jeff Layton | 1265965 | 2014-07-10 14:07:28 -0400 | [diff] [blame] | 480 | static void |
| 481 | __nfs4_file_get_access(struct nfs4_file *fp, u32 access) |
J. Bruce Fields | 3477565 | 2013-08-23 17:55:18 -0400 | [diff] [blame] | 482 | { |
Jeff Layton | 7214e86 | 2014-07-10 14:07:33 -0400 | [diff] [blame] | 483 | lockdep_assert_held(&fp->fi_lock); |
| 484 | |
Jeff Layton | 1265965 | 2014-07-10 14:07:28 -0400 | [diff] [blame] | 485 | if (access & NFS4_SHARE_ACCESS_WRITE) |
| 486 | atomic_inc(&fp->fi_access[O_WRONLY]); |
| 487 | if (access & NFS4_SHARE_ACCESS_READ) |
| 488 | atomic_inc(&fp->fi_access[O_RDONLY]); |
J. Bruce Fields | 3477565 | 2013-08-23 17:55:18 -0400 | [diff] [blame] | 489 | } |
| 490 | |
Jeff Layton | 1265965 | 2014-07-10 14:07:28 -0400 | [diff] [blame] | 491 | static __be32 |
| 492 | nfs4_file_get_access(struct nfs4_file *fp, u32 access) |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 493 | { |
Jeff Layton | 7214e86 | 2014-07-10 14:07:33 -0400 | [diff] [blame] | 494 | lockdep_assert_held(&fp->fi_lock); |
| 495 | |
Jeff Layton | 1265965 | 2014-07-10 14:07:28 -0400 | [diff] [blame] | 496 | /* Does this access mode make sense? */ |
| 497 | if (access & ~NFS4_SHARE_ACCESS_BOTH) |
| 498 | return nfserr_inval; |
| 499 | |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 500 | /* Does it conflict with a deny mode already set? */ |
| 501 | if ((access & fp->fi_share_deny) != 0) |
| 502 | return nfserr_share_denied; |
| 503 | |
Jeff Layton | 1265965 | 2014-07-10 14:07:28 -0400 | [diff] [blame] | 504 | __nfs4_file_get_access(fp, access); |
| 505 | return nfs_ok; |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 506 | } |
| 507 | |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 508 | static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) |
| 509 | { |
| 510 | /* Common case is that there is no deny mode. */ |
| 511 | if (deny) { |
| 512 | /* Does this deny mode make sense? */ |
| 513 | if (deny & ~NFS4_SHARE_DENY_BOTH) |
| 514 | return nfserr_inval; |
| 515 | |
| 516 | if ((deny & NFS4_SHARE_DENY_READ) && |
| 517 | atomic_read(&fp->fi_access[O_RDONLY])) |
| 518 | return nfserr_share_denied; |
| 519 | |
| 520 | if ((deny & NFS4_SHARE_DENY_WRITE) && |
| 521 | atomic_read(&fp->fi_access[O_WRONLY])) |
| 522 | return nfserr_share_denied; |
| 523 | } |
| 524 | return nfs_ok; |
| 525 | } |
| 526 | |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 527 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 528 | { |
Trond Myklebust | de18643 | 2014-07-10 14:07:26 -0400 | [diff] [blame] | 529 | might_lock(&fp->fi_lock); |
| 530 | |
| 531 | if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { |
| 532 | struct file *f1 = NULL; |
| 533 | struct file *f2 = NULL; |
| 534 | |
Jeff Layton | 6d338b5 | 2014-07-10 14:07:29 -0400 | [diff] [blame] | 535 | swap(f1, fp->fi_fds[oflag]); |
J. Bruce Fields | 0c7c3e6 | 2013-03-28 20:37:14 -0400 | [diff] [blame] | 536 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
Jeff Layton | 6d338b5 | 2014-07-10 14:07:29 -0400 | [diff] [blame] | 537 | swap(f2, fp->fi_fds[O_RDWR]); |
Trond Myklebust | de18643 | 2014-07-10 14:07:26 -0400 | [diff] [blame] | 538 | spin_unlock(&fp->fi_lock); |
| 539 | if (f1) |
| 540 | fput(f1); |
| 541 | if (f2) |
| 542 | fput(f2); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 543 | } |
| 544 | } |
| 545 | |
Jeff Layton | 1265965 | 2014-07-10 14:07:28 -0400 | [diff] [blame] | 546 | static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 547 | { |
Jeff Layton | 1265965 | 2014-07-10 14:07:28 -0400 | [diff] [blame] | 548 | WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); |
| 549 | |
| 550 | if (access & NFS4_SHARE_ACCESS_WRITE) |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 551 | __nfs4_file_put_access(fp, O_WRONLY); |
Jeff Layton | 1265965 | 2014-07-10 14:07:28 -0400 | [diff] [blame] | 552 | if (access & NFS4_SHARE_ACCESS_READ) |
| 553 | __nfs4_file_put_access(fp, O_RDONLY); |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 554 | } |
| 555 | |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 556 | /* |
| 557 | * Allocate a new open/delegation state counter. This is needed for |
| 558 | * pNFS for proper return on close semantics. |
| 559 | * |
| 560 | * Note that we only allocate it for pNFS-enabled exports, otherwise |
| 561 | * all pointers to struct nfs4_clnt_odstate are always NULL. |
| 562 | */ |
| 563 | static struct nfs4_clnt_odstate * |
| 564 | alloc_clnt_odstate(struct nfs4_client *clp) |
| 565 | { |
| 566 | struct nfs4_clnt_odstate *co; |
| 567 | |
| 568 | co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); |
| 569 | if (co) { |
| 570 | co->co_client = clp; |
| 571 | atomic_set(&co->co_odcount, 1); |
| 572 | } |
| 573 | return co; |
| 574 | } |
| 575 | |
| 576 | static void |
| 577 | hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) |
| 578 | { |
| 579 | struct nfs4_file *fp = co->co_file; |
| 580 | |
| 581 | lockdep_assert_held(&fp->fi_lock); |
| 582 | list_add(&co->co_perfile, &fp->fi_clnt_odstate); |
| 583 | } |
| 584 | |
| 585 | static inline void |
| 586 | get_clnt_odstate(struct nfs4_clnt_odstate *co) |
| 587 | { |
| 588 | if (co) |
| 589 | atomic_inc(&co->co_odcount); |
| 590 | } |
| 591 | |
| 592 | static void |
| 593 | put_clnt_odstate(struct nfs4_clnt_odstate *co) |
| 594 | { |
| 595 | struct nfs4_file *fp; |
| 596 | |
| 597 | if (!co) |
| 598 | return; |
| 599 | |
| 600 | fp = co->co_file; |
| 601 | if (atomic_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { |
| 602 | list_del(&co->co_perfile); |
| 603 | spin_unlock(&fp->fi_lock); |
| 604 | |
| 605 | nfsd4_return_all_file_layouts(co->co_client, fp); |
| 606 | kmem_cache_free(odstate_slab, co); |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | static struct nfs4_clnt_odstate * |
| 611 | find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) |
| 612 | { |
| 613 | struct nfs4_clnt_odstate *co; |
| 614 | struct nfs4_client *cl; |
| 615 | |
| 616 | if (!new) |
| 617 | return NULL; |
| 618 | |
| 619 | cl = new->co_client; |
| 620 | |
| 621 | spin_lock(&fp->fi_lock); |
| 622 | list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { |
| 623 | if (co->co_client == cl) { |
| 624 | get_clnt_odstate(co); |
| 625 | goto out; |
| 626 | } |
| 627 | } |
| 628 | co = new; |
| 629 | co->co_file = fp; |
| 630 | hash_clnt_odstate_locked(new); |
| 631 | out: |
| 632 | spin_unlock(&fp->fi_lock); |
| 633 | return co; |
| 634 | } |
| 635 | |
Kinglong Mee | d19fb70 | 2017-01-18 19:04:42 +0800 | [diff] [blame] | 636 | struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, |
| 637 | void (*sc_free)(struct nfs4_stid *)) |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 638 | { |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 639 | struct nfs4_stid *stid; |
| 640 | int new_id; |
| 641 | |
Trond Myklebust | f833883 | 2014-07-25 07:34:19 -0400 | [diff] [blame] | 642 | stid = kmem_cache_zalloc(slab, GFP_KERNEL); |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 643 | if (!stid) |
| 644 | return NULL; |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 645 | |
Jeff Layton | 4770d72 | 2014-07-29 21:34:10 -0400 | [diff] [blame] | 646 | idr_preload(GFP_KERNEL); |
| 647 | spin_lock(&cl->cl_lock); |
| 648 | new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT); |
| 649 | spin_unlock(&cl->cl_lock); |
| 650 | idr_preload_end(); |
Tejun Heo | ebd6c70 | 2013-03-13 14:59:37 -0700 | [diff] [blame] | 651 | if (new_id < 0) |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 652 | goto out_free; |
Kinglong Mee | d19fb70 | 2017-01-18 19:04:42 +0800 | [diff] [blame] | 653 | |
| 654 | stid->sc_free = sc_free; |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 655 | stid->sc_client = cl; |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 656 | stid->sc_stateid.si_opaque.so_id = new_id; |
| 657 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; |
| 658 | /* Will be incremented before return to client: */ |
Trond Myklebust | 72c0b0f | 2014-07-21 09:34:58 -0400 | [diff] [blame] | 659 | atomic_set(&stid->sc_count, 1); |
Jeff Layton | 9767feb | 2015-10-01 09:05:50 -0400 | [diff] [blame] | 660 | spin_lock_init(&stid->sc_lock); |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 661 | |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 662 | /* |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 663 | * It shouldn't be a problem to reuse an opaque stateid value. |
| 664 | * I don't think it is for 4.1. But with 4.0 I worry that, for |
| 665 | * example, a stray write retransmission could be accepted by |
| 666 | * the server when it should have been rejected. Therefore, |
| 667 | * adopt a trick from the sctp code to attempt to maximize the |
| 668 | * amount of time until an id is reused, by ensuring they always |
| 669 | * "increase" (mod INT_MAX): |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 670 | */ |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 671 | return stid; |
| 672 | out_free: |
Wei Yongjun | 2c44a23 | 2013-04-09 14:15:31 +0800 | [diff] [blame] | 673 | kmem_cache_free(slab, stid); |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 674 | return NULL; |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 675 | } |
| 676 | |
Jeff Layton | b49e084 | 2014-07-29 21:34:11 -0400 | [diff] [blame] | 677 | static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 678 | { |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 679 | struct nfs4_stid *stid; |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 680 | |
Kinglong Mee | d19fb70 | 2017-01-18 19:04:42 +0800 | [diff] [blame] | 681 | stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid); |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 682 | if (!stid) |
| 683 | return NULL; |
| 684 | |
Kinglong Mee | d19fb70 | 2017-01-18 19:04:42 +0800 | [diff] [blame] | 685 | return openlockstateid(stid); |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 686 | } |
| 687 | |
| 688 | static void nfs4_free_deleg(struct nfs4_stid *stid) |
| 689 | { |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 690 | kmem_cache_free(deleg_slab, stid); |
| 691 | atomic_long_dec(&num_delegations); |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 692 | } |
| 693 | |
NeilBrown | 6282cd5 | 2014-06-04 17:39:26 +1000 | [diff] [blame] | 694 | /* |
| 695 | * When we recall a delegation, we should be careful not to hand it |
| 696 | * out again straight away. |
| 697 | * To ensure this we keep a pair of bloom filters ('new' and 'old') |
| 698 | * in which the filehandles of recalled delegations are "stored". |
| 699 | * If a filehandle appear in either filter, a delegation is blocked. |
| 700 | * When a delegation is recalled, the filehandle is stored in the "new" |
| 701 | * filter. |
| 702 | * Every 30 seconds we swap the filters and clear the "new" one, |
| 703 | * unless both are empty of course. |
| 704 | * |
| 705 | * Each filter is 256 bits. We hash the filehandle to 32bit and use the |
| 706 | * low 3 bytes as hash-table indices. |
| 707 | * |
Jeff Layton | f54fe96 | 2014-07-25 07:34:26 -0400 | [diff] [blame] | 708 | * 'blocked_delegations_lock', which is always taken in block_delegations(), |
NeilBrown | 6282cd5 | 2014-06-04 17:39:26 +1000 | [diff] [blame] | 709 | * is used to manage concurrent access. Testing does not need the lock |
| 710 | * except when swapping the two filters. |
| 711 | */ |
Jeff Layton | f54fe96 | 2014-07-25 07:34:26 -0400 | [diff] [blame] | 712 | static DEFINE_SPINLOCK(blocked_delegations_lock); |
NeilBrown | 6282cd5 | 2014-06-04 17:39:26 +1000 | [diff] [blame] | 713 | static struct bloom_pair { |
| 714 | int entries, old_entries; |
| 715 | time_t swap_time; |
| 716 | int new; /* index into 'set' */ |
| 717 | DECLARE_BITMAP(set[2], 256); |
| 718 | } blocked_delegations; |
| 719 | |
| 720 | static int delegation_blocked(struct knfsd_fh *fh) |
| 721 | { |
| 722 | u32 hash; |
| 723 | struct bloom_pair *bd = &blocked_delegations; |
| 724 | |
| 725 | if (bd->entries == 0) |
| 726 | return 0; |
| 727 | if (seconds_since_boot() - bd->swap_time > 30) { |
Jeff Layton | f54fe96 | 2014-07-25 07:34:26 -0400 | [diff] [blame] | 728 | spin_lock(&blocked_delegations_lock); |
NeilBrown | 6282cd5 | 2014-06-04 17:39:26 +1000 | [diff] [blame] | 729 | if (seconds_since_boot() - bd->swap_time > 30) { |
| 730 | bd->entries -= bd->old_entries; |
| 731 | bd->old_entries = bd->entries; |
| 732 | memset(bd->set[bd->new], 0, |
| 733 | sizeof(bd->set[0])); |
| 734 | bd->new = 1-bd->new; |
| 735 | bd->swap_time = seconds_since_boot(); |
| 736 | } |
Jeff Layton | f54fe96 | 2014-07-25 07:34:26 -0400 | [diff] [blame] | 737 | spin_unlock(&blocked_delegations_lock); |
NeilBrown | 6282cd5 | 2014-06-04 17:39:26 +1000 | [diff] [blame] | 738 | } |
Daniel Borkmann | 8754589 | 2014-12-10 16:33:11 +0100 | [diff] [blame] | 739 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
NeilBrown | 6282cd5 | 2014-06-04 17:39:26 +1000 | [diff] [blame] | 740 | if (test_bit(hash&255, bd->set[0]) && |
| 741 | test_bit((hash>>8)&255, bd->set[0]) && |
| 742 | test_bit((hash>>16)&255, bd->set[0])) |
| 743 | return 1; |
| 744 | |
| 745 | if (test_bit(hash&255, bd->set[1]) && |
| 746 | test_bit((hash>>8)&255, bd->set[1]) && |
| 747 | test_bit((hash>>16)&255, bd->set[1])) |
| 748 | return 1; |
| 749 | |
| 750 | return 0; |
| 751 | } |
| 752 | |
| 753 | static void block_delegations(struct knfsd_fh *fh) |
| 754 | { |
| 755 | u32 hash; |
| 756 | struct bloom_pair *bd = &blocked_delegations; |
| 757 | |
Daniel Borkmann | 8754589 | 2014-12-10 16:33:11 +0100 | [diff] [blame] | 758 | hash = jhash(&fh->fh_base, fh->fh_size, 0); |
NeilBrown | 6282cd5 | 2014-06-04 17:39:26 +1000 | [diff] [blame] | 759 | |
Jeff Layton | f54fe96 | 2014-07-25 07:34:26 -0400 | [diff] [blame] | 760 | spin_lock(&blocked_delegations_lock); |
NeilBrown | 6282cd5 | 2014-06-04 17:39:26 +1000 | [diff] [blame] | 761 | __set_bit(hash&255, bd->set[bd->new]); |
| 762 | __set_bit((hash>>8)&255, bd->set[bd->new]); |
| 763 | __set_bit((hash>>16)&255, bd->set[bd->new]); |
| 764 | if (bd->entries == 0) |
| 765 | bd->swap_time = seconds_since_boot(); |
| 766 | bd->entries += 1; |
Jeff Layton | f54fe96 | 2014-07-25 07:34:26 -0400 | [diff] [blame] | 767 | spin_unlock(&blocked_delegations_lock); |
NeilBrown | 6282cd5 | 2014-06-04 17:39:26 +1000 | [diff] [blame] | 768 | } |
| 769 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | static struct nfs4_delegation * |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 771 | alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh, |
| 772 | struct nfs4_clnt_odstate *odstate) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | { |
| 774 | struct nfs4_delegation *dp; |
Trond Myklebust | 02a3508 | 2014-07-25 07:34:22 -0400 | [diff] [blame] | 775 | long n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | |
| 777 | dprintk("NFSD alloc_init_deleg\n"); |
Trond Myklebust | 02a3508 | 2014-07-25 07:34:22 -0400 | [diff] [blame] | 778 | n = atomic_long_inc_return(&num_delegations); |
| 779 | if (n < 0 || n > max_delegations) |
| 780 | goto out_dec; |
NeilBrown | 6282cd5 | 2014-06-04 17:39:26 +1000 | [diff] [blame] | 781 | if (delegation_blocked(¤t_fh->fh_handle)) |
Trond Myklebust | 02a3508 | 2014-07-25 07:34:22 -0400 | [diff] [blame] | 782 | goto out_dec; |
Kinglong Mee | d19fb70 | 2017-01-18 19:04:42 +0800 | [diff] [blame] | 783 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg)); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 784 | if (dp == NULL) |
Trond Myklebust | 02a3508 | 2014-07-25 07:34:22 -0400 | [diff] [blame] | 785 | goto out_dec; |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 786 | |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 787 | /* |
| 788 | * delegation seqid's are never incremented. The 4.1 special |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 789 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
| 790 | * 0 anyway just for consistency and use 1: |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 791 | */ |
| 792 | dp->dl_stid.sc_stateid.si_generation = 1; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 793 | INIT_LIST_HEAD(&dp->dl_perfile); |
| 794 | INIT_LIST_HEAD(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 796 | dp->dl_clnt_odstate = odstate; |
| 797 | get_clnt_odstate(odstate); |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 798 | dp->dl_type = NFS4_OPEN_DELEGATE_READ; |
Christoph Hellwig | f0b5de1 | 2014-09-24 12:19:18 +0200 | [diff] [blame] | 799 | dp->dl_retries = 1; |
| 800 | nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 801 | &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | return dp; |
Trond Myklebust | 02a3508 | 2014-07-25 07:34:22 -0400 | [diff] [blame] | 803 | out_dec: |
| 804 | atomic_long_dec(&num_delegations); |
| 805 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | } |
| 807 | |
| 808 | void |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 809 | nfs4_put_stid(struct nfs4_stid *s) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | { |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 811 | struct nfs4_file *fp = s->sc_file; |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 812 | struct nfs4_client *clp = s->sc_client; |
| 813 | |
Jeff Layton | 4770d72 | 2014-07-29 21:34:10 -0400 | [diff] [blame] | 814 | might_lock(&clp->cl_lock); |
| 815 | |
Jeff Layton | b401be22 | 2014-07-29 21:34:33 -0400 | [diff] [blame] | 816 | if (!atomic_dec_and_lock(&s->sc_count, &clp->cl_lock)) { |
| 817 | wake_up_all(&close_wq); |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 818 | return; |
Jeff Layton | b401be22 | 2014-07-29 21:34:33 -0400 | [diff] [blame] | 819 | } |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 820 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
Jeff Layton | 4770d72 | 2014-07-29 21:34:10 -0400 | [diff] [blame] | 821 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 822 | s->sc_free(s); |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 823 | if (fp) |
| 824 | put_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | } |
| 826 | |
Jeff Layton | 9767feb | 2015-10-01 09:05:50 -0400 | [diff] [blame] | 827 | void |
| 828 | nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) |
| 829 | { |
| 830 | stateid_t *src = &stid->sc_stateid; |
| 831 | |
| 832 | spin_lock(&stid->sc_lock); |
| 833 | if (unlikely(++src->si_generation == 0)) |
| 834 | src->si_generation = 1; |
| 835 | memcpy(dst, src, sizeof(*dst)); |
| 836 | spin_unlock(&stid->sc_lock); |
| 837 | } |
| 838 | |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 839 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | { |
Jeff Layton | 6bcc034 | 2014-08-09 10:22:40 -0400 | [diff] [blame] | 841 | struct file *filp = NULL; |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 842 | |
Jeff Layton | 6bcc034 | 2014-08-09 10:22:40 -0400 | [diff] [blame] | 843 | spin_lock(&fp->fi_lock); |
Jeff Layton | 67db103 | 2014-12-13 09:11:40 -0500 | [diff] [blame] | 844 | if (fp->fi_deleg_file && --fp->fi_delegees == 0) |
Jeff Layton | 6bcc034 | 2014-08-09 10:22:40 -0400 | [diff] [blame] | 845 | swap(filp, fp->fi_deleg_file); |
Jeff Layton | 6bcc034 | 2014-08-09 10:22:40 -0400 | [diff] [blame] | 846 | spin_unlock(&fp->fi_lock); |
| 847 | |
| 848 | if (filp) { |
Christoph Hellwig | 2ab99ee | 2015-01-21 19:14:02 +0100 | [diff] [blame] | 849 | vfs_setlease(filp, F_UNLCK, NULL, (void **)&fp); |
Jeff Layton | 6bcc034 | 2014-08-09 10:22:40 -0400 | [diff] [blame] | 850 | fput(filp); |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 851 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | } |
| 853 | |
Christoph Hellwig | cd61c52 | 2014-08-14 08:44:57 +0200 | [diff] [blame] | 854 | void nfs4_unhash_stid(struct nfs4_stid *s) |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 855 | { |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 856 | s->sc_type = 0; |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 857 | } |
| 858 | |
Andrew Elble | 34ed987 | 2015-10-15 12:07:28 -0400 | [diff] [blame] | 859 | /** |
| 860 | * nfs4_get_existing_delegation - Discover if this delegation already exists |
| 861 | * @clp: a pointer to the nfs4_client we're granting a delegation to |
| 862 | * @fp: a pointer to the nfs4_file we're granting a delegation on |
| 863 | * |
| 864 | * Return: |
| 865 | * On success: NULL if an existing delegation was not found. |
| 866 | * |
| 867 | * On error: -EAGAIN if one was previously granted to this nfs4_client |
| 868 | * for this nfs4_file. |
| 869 | * |
| 870 | */ |
| 871 | |
| 872 | static int |
| 873 | nfs4_get_existing_delegation(struct nfs4_client *clp, struct nfs4_file *fp) |
Benny Halevy | 931ee56 | 2014-05-30 09:09:27 -0400 | [diff] [blame] | 874 | { |
Andrew Elble | 34ed987 | 2015-10-15 12:07:28 -0400 | [diff] [blame] | 875 | struct nfs4_delegation *searchdp = NULL; |
| 876 | struct nfs4_client *searchclp = NULL; |
| 877 | |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 878 | lockdep_assert_held(&state_lock); |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 879 | lockdep_assert_held(&fp->fi_lock); |
Benny Halevy | 931ee56 | 2014-05-30 09:09:27 -0400 | [diff] [blame] | 880 | |
Andrew Elble | 34ed987 | 2015-10-15 12:07:28 -0400 | [diff] [blame] | 881 | list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { |
| 882 | searchclp = searchdp->dl_stid.sc_client; |
| 883 | if (clp == searchclp) { |
| 884 | return -EAGAIN; |
| 885 | } |
| 886 | } |
| 887 | return 0; |
| 888 | } |
| 889 | |
| 890 | /** |
| 891 | * hash_delegation_locked - Add a delegation to the appropriate lists |
| 892 | * @dp: a pointer to the nfs4_delegation we are adding. |
| 893 | * @fp: a pointer to the nfs4_file we're granting a delegation on |
| 894 | * |
| 895 | * Return: |
| 896 | * On success: NULL if the delegation was successfully hashed. |
| 897 | * |
| 898 | * On error: -EAGAIN if one was previously granted to this |
| 899 | * nfs4_client for this nfs4_file. Delegation is not hashed. |
| 900 | * |
| 901 | */ |
| 902 | |
| 903 | static int |
| 904 | hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) |
| 905 | { |
| 906 | int status; |
| 907 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
| 908 | |
| 909 | lockdep_assert_held(&state_lock); |
| 910 | lockdep_assert_held(&fp->fi_lock); |
| 911 | |
| 912 | status = nfs4_get_existing_delegation(clp, fp); |
| 913 | if (status) |
| 914 | return status; |
| 915 | ++fp->fi_delegees; |
Trond Myklebust | 67cb127 | 2014-07-29 21:34:17 -0400 | [diff] [blame] | 916 | atomic_inc(&dp->dl_stid.sc_count); |
Benny Halevy | 3fb87d1 | 2014-05-30 09:09:31 -0400 | [diff] [blame] | 917 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
Benny Halevy | 931ee56 | 2014-05-30 09:09:27 -0400 | [diff] [blame] | 918 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
Andrew Elble | 34ed987 | 2015-10-15 12:07:28 -0400 | [diff] [blame] | 919 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
| 920 | return 0; |
Benny Halevy | 931ee56 | 2014-05-30 09:09:27 -0400 | [diff] [blame] | 921 | } |
| 922 | |
Jeff Layton | 3fcbbd2 | 2015-08-24 12:41:48 -0400 | [diff] [blame] | 923 | static bool |
Jeff Layton | 4269067 | 2014-07-25 07:34:20 -0400 | [diff] [blame] | 924 | unhash_delegation_locked(struct nfs4_delegation *dp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | { |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 926 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
Jeff Layton | 02e1215 | 2014-07-16 10:31:57 -0400 | [diff] [blame] | 927 | |
Jeff Layton | 4269067 | 2014-07-25 07:34:20 -0400 | [diff] [blame] | 928 | lockdep_assert_held(&state_lock); |
| 929 | |
Jeff Layton | 3fcbbd2 | 2015-08-24 12:41:48 -0400 | [diff] [blame] | 930 | if (list_empty(&dp->dl_perfile)) |
| 931 | return false; |
| 932 | |
Trond Myklebust | b0fc29d | 2014-07-16 10:31:59 -0400 | [diff] [blame] | 933 | dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; |
Jeff Layton | d55a166 | 2014-07-22 13:52:06 -0400 | [diff] [blame] | 934 | /* Ensure that deleg break won't try to requeue it */ |
| 935 | ++dp->dl_time; |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 936 | spin_lock(&fp->fi_lock); |
Benny Halevy | 931ee56 | 2014-05-30 09:09:27 -0400 | [diff] [blame] | 937 | list_del_init(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | list_del_init(&dp->dl_recall_lru); |
Jeff Layton | 02e1215 | 2014-07-16 10:31:57 -0400 | [diff] [blame] | 939 | list_del_init(&dp->dl_perfile); |
| 940 | spin_unlock(&fp->fi_lock); |
Jeff Layton | 3fcbbd2 | 2015-08-24 12:41:48 -0400 | [diff] [blame] | 941 | return true; |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 942 | } |
| 943 | |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 944 | static void destroy_delegation(struct nfs4_delegation *dp) |
| 945 | { |
Jeff Layton | 3fcbbd2 | 2015-08-24 12:41:48 -0400 | [diff] [blame] | 946 | bool unhashed; |
| 947 | |
Jeff Layton | 4269067 | 2014-07-25 07:34:20 -0400 | [diff] [blame] | 948 | spin_lock(&state_lock); |
Jeff Layton | 3fcbbd2 | 2015-08-24 12:41:48 -0400 | [diff] [blame] | 949 | unhashed = unhash_delegation_locked(dp); |
Jeff Layton | 4269067 | 2014-07-25 07:34:20 -0400 | [diff] [blame] | 950 | spin_unlock(&state_lock); |
Jeff Layton | 3fcbbd2 | 2015-08-24 12:41:48 -0400 | [diff] [blame] | 951 | if (unhashed) { |
| 952 | put_clnt_odstate(dp->dl_clnt_odstate); |
| 953 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
| 954 | nfs4_put_stid(&dp->dl_stid); |
| 955 | } |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 956 | } |
| 957 | |
| 958 | static void revoke_delegation(struct nfs4_delegation *dp) |
| 959 | { |
| 960 | struct nfs4_client *clp = dp->dl_stid.sc_client; |
| 961 | |
Jeff Layton | 2d4a532 | 2014-07-25 07:34:21 -0400 | [diff] [blame] | 962 | WARN_ON(!list_empty(&dp->dl_recall_lru)); |
| 963 | |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 964 | put_clnt_odstate(dp->dl_clnt_odstate); |
Jeff Layton | afbda40 | 2014-08-09 10:22:41 -0400 | [diff] [blame] | 965 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
| 966 | |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 967 | if (clp->cl_minorversion == 0) |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 968 | nfs4_put_stid(&dp->dl_stid); |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 969 | else { |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 970 | dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; |
Jeff Layton | 2d4a532 | 2014-07-25 07:34:21 -0400 | [diff] [blame] | 971 | spin_lock(&clp->cl_lock); |
| 972 | list_add(&dp->dl_recall_lru, &clp->cl_revoked); |
| 973 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 974 | } |
| 975 | } |
| 976 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | /* |
| 978 | * SETCLIENTID state |
| 979 | */ |
| 980 | |
J. Bruce Fields | ddc04c4 | 2011-07-30 23:46:29 -0400 | [diff] [blame] | 981 | static unsigned int clientid_hashval(u32 id) |
| 982 | { |
| 983 | return id & CLIENT_HASH_MASK; |
| 984 | } |
| 985 | |
| 986 | static unsigned int clientstr_hashval(const char *name) |
| 987 | { |
| 988 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; |
| 989 | } |
| 990 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | /* |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 992 | * We store the NONE, READ, WRITE, and BOTH bits separately in the |
| 993 | * st_{access,deny}_bmap field of the stateid, in order to track not |
| 994 | * only what share bits are currently in force, but also what |
| 995 | * combinations of share bits previous opens have used. This allows us |
| 996 | * to enforce the recommendation of rfc 3530 14.2.19 that the server |
| 997 | * return an error if the client attempt to downgrade to a combination |
| 998 | * of share bits not explicable by closing some of its previous opens. |
| 999 | * |
| 1000 | * XXX: This enforcement is actually incomplete, since we don't keep |
| 1001 | * track of access/deny bit combinations; so, e.g., we allow: |
| 1002 | * |
| 1003 | * OPEN allow read, deny write |
| 1004 | * OPEN allow both, deny none |
| 1005 | * DOWNGRADE allow read, deny none |
| 1006 | * |
| 1007 | * which we should reject. |
| 1008 | */ |
Jeff Layton | 5ae037e | 2012-05-11 09:45:11 -0400 | [diff] [blame] | 1009 | static unsigned int |
| 1010 | bmap_to_share_mode(unsigned long bmap) { |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 1011 | int i; |
Jeff Layton | 5ae037e | 2012-05-11 09:45:11 -0400 | [diff] [blame] | 1012 | unsigned int access = 0; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 1013 | |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 1014 | for (i = 1; i < 4; i++) { |
| 1015 | if (test_bit(i, &bmap)) |
Jeff Layton | 5ae037e | 2012-05-11 09:45:11 -0400 | [diff] [blame] | 1016 | access |= i; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 1017 | } |
Jeff Layton | 5ae037e | 2012-05-11 09:45:11 -0400 | [diff] [blame] | 1018 | return access; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 1019 | } |
| 1020 | |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 1021 | /* set share access for a given stateid */ |
| 1022 | static inline void |
| 1023 | set_access(u32 access, struct nfs4_ol_stateid *stp) |
| 1024 | { |
Jeff Layton | c11c591 | 2014-07-10 14:07:30 -0400 | [diff] [blame] | 1025 | unsigned char mask = 1 << access; |
| 1026 | |
| 1027 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); |
| 1028 | stp->st_access_bmap |= mask; |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 1029 | } |
| 1030 | |
| 1031 | /* clear share access for a given stateid */ |
| 1032 | static inline void |
| 1033 | clear_access(u32 access, struct nfs4_ol_stateid *stp) |
| 1034 | { |
Jeff Layton | c11c591 | 2014-07-10 14:07:30 -0400 | [diff] [blame] | 1035 | unsigned char mask = 1 << access; |
| 1036 | |
| 1037 | WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); |
| 1038 | stp->st_access_bmap &= ~mask; |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 1039 | } |
| 1040 | |
| 1041 | /* test whether a given stateid has access */ |
| 1042 | static inline bool |
| 1043 | test_access(u32 access, struct nfs4_ol_stateid *stp) |
| 1044 | { |
Jeff Layton | c11c591 | 2014-07-10 14:07:30 -0400 | [diff] [blame] | 1045 | unsigned char mask = 1 << access; |
| 1046 | |
| 1047 | return (bool)(stp->st_access_bmap & mask); |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 1048 | } |
| 1049 | |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 1050 | /* set share deny for a given stateid */ |
| 1051 | static inline void |
Jeff Layton | c11c591 | 2014-07-10 14:07:30 -0400 | [diff] [blame] | 1052 | set_deny(u32 deny, struct nfs4_ol_stateid *stp) |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 1053 | { |
Jeff Layton | c11c591 | 2014-07-10 14:07:30 -0400 | [diff] [blame] | 1054 | unsigned char mask = 1 << deny; |
| 1055 | |
| 1056 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); |
| 1057 | stp->st_deny_bmap |= mask; |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 1058 | } |
| 1059 | |
| 1060 | /* clear share deny for a given stateid */ |
| 1061 | static inline void |
Jeff Layton | c11c591 | 2014-07-10 14:07:30 -0400 | [diff] [blame] | 1062 | clear_deny(u32 deny, struct nfs4_ol_stateid *stp) |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 1063 | { |
Jeff Layton | c11c591 | 2014-07-10 14:07:30 -0400 | [diff] [blame] | 1064 | unsigned char mask = 1 << deny; |
| 1065 | |
| 1066 | WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); |
| 1067 | stp->st_deny_bmap &= ~mask; |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 1068 | } |
| 1069 | |
| 1070 | /* test whether a given stateid is denying specific access */ |
| 1071 | static inline bool |
Jeff Layton | c11c591 | 2014-07-10 14:07:30 -0400 | [diff] [blame] | 1072 | test_deny(u32 deny, struct nfs4_ol_stateid *stp) |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 1073 | { |
Jeff Layton | c11c591 | 2014-07-10 14:07:30 -0400 | [diff] [blame] | 1074 | unsigned char mask = 1 << deny; |
| 1075 | |
| 1076 | return (bool)(stp->st_deny_bmap & mask); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 1077 | } |
| 1078 | |
| 1079 | static int nfs4_access_to_omode(u32 access) |
| 1080 | { |
J. Bruce Fields | 8f34a43 | 2010-09-02 15:23:16 -0400 | [diff] [blame] | 1081 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 1082 | case NFS4_SHARE_ACCESS_READ: |
| 1083 | return O_RDONLY; |
| 1084 | case NFS4_SHARE_ACCESS_WRITE: |
| 1085 | return O_WRONLY; |
| 1086 | case NFS4_SHARE_ACCESS_BOTH: |
| 1087 | return O_RDWR; |
| 1088 | } |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 1089 | WARN_ON_ONCE(1); |
| 1090 | return O_RDONLY; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 1091 | } |
| 1092 | |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 1093 | /* |
| 1094 | * A stateid that had a deny mode associated with it is being released |
| 1095 | * or downgraded. Recalculate the deny mode on the file. |
| 1096 | */ |
| 1097 | static void |
| 1098 | recalculate_deny_mode(struct nfs4_file *fp) |
| 1099 | { |
| 1100 | struct nfs4_ol_stateid *stp; |
| 1101 | |
| 1102 | spin_lock(&fp->fi_lock); |
| 1103 | fp->fi_share_deny = 0; |
| 1104 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) |
| 1105 | fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); |
| 1106 | spin_unlock(&fp->fi_lock); |
| 1107 | } |
| 1108 | |
| 1109 | static void |
| 1110 | reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) |
| 1111 | { |
| 1112 | int i; |
| 1113 | bool change = false; |
| 1114 | |
| 1115 | for (i = 1; i < 4; i++) { |
| 1116 | if ((i & deny) != i) { |
| 1117 | change = true; |
| 1118 | clear_deny(i, stp); |
| 1119 | } |
| 1120 | } |
| 1121 | |
| 1122 | /* Recalculate per-file deny mode if there was a change */ |
| 1123 | if (change) |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 1124 | recalculate_deny_mode(stp->st_stid.sc_file); |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 1125 | } |
| 1126 | |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 1127 | /* release all access and file references for a given stateid */ |
| 1128 | static void |
| 1129 | release_all_access(struct nfs4_ol_stateid *stp) |
| 1130 | { |
| 1131 | int i; |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 1132 | struct nfs4_file *fp = stp->st_stid.sc_file; |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 1133 | |
| 1134 | if (fp && stp->st_deny_bmap != 0) |
| 1135 | recalculate_deny_mode(fp); |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 1136 | |
| 1137 | for (i = 1; i < 4; i++) { |
| 1138 | if (test_access(i, stp)) |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 1139 | nfs4_file_put_access(stp->st_stid.sc_file, i); |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 1140 | clear_access(i, stp); |
| 1141 | } |
| 1142 | } |
| 1143 | |
Kinglong Mee | d50ffde | 2015-07-16 12:05:07 +0800 | [diff] [blame] | 1144 | static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) |
| 1145 | { |
| 1146 | kfree(sop->so_owner.data); |
| 1147 | sop->so_ops->so_free(sop); |
| 1148 | } |
| 1149 | |
Jeff Layton | 6b180f0 | 2014-07-29 21:34:26 -0400 | [diff] [blame] | 1150 | static void nfs4_put_stateowner(struct nfs4_stateowner *sop) |
| 1151 | { |
Jeff Layton | a819ecc | 2014-07-29 21:34:38 -0400 | [diff] [blame] | 1152 | struct nfs4_client *clp = sop->so_client; |
| 1153 | |
| 1154 | might_lock(&clp->cl_lock); |
| 1155 | |
| 1156 | if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) |
Jeff Layton | 6b180f0 | 2014-07-29 21:34:26 -0400 | [diff] [blame] | 1157 | return; |
Jeff Layton | 8f4b54c | 2014-07-29 21:34:29 -0400 | [diff] [blame] | 1158 | sop->so_ops->so_unhash(sop); |
Jeff Layton | a819ecc | 2014-07-29 21:34:38 -0400 | [diff] [blame] | 1159 | spin_unlock(&clp->cl_lock); |
Kinglong Mee | d50ffde | 2015-07-16 12:05:07 +0800 | [diff] [blame] | 1160 | nfs4_free_stateowner(sop); |
Jeff Layton | 6b180f0 | 2014-07-29 21:34:26 -0400 | [diff] [blame] | 1161 | } |
| 1162 | |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1163 | static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 1164 | { |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 1165 | struct nfs4_file *fp = stp->st_stid.sc_file; |
Trond Myklebust | 1d31a25 | 2014-07-10 14:07:25 -0400 | [diff] [blame] | 1166 | |
Jeff Layton | 1c755dc | 2014-07-29 21:34:12 -0400 | [diff] [blame] | 1167 | lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); |
| 1168 | |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1169 | if (list_empty(&stp->st_perfile)) |
| 1170 | return false; |
| 1171 | |
Trond Myklebust | 1d31a25 | 2014-07-10 14:07:25 -0400 | [diff] [blame] | 1172 | spin_lock(&fp->fi_lock); |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1173 | list_del_init(&stp->st_perfile); |
Trond Myklebust | 1d31a25 | 2014-07-10 14:07:25 -0400 | [diff] [blame] | 1174 | spin_unlock(&fp->fi_lock); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 1175 | list_del(&stp->st_perstateowner); |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1176 | return true; |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 1177 | } |
| 1178 | |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 1179 | static void nfs4_free_ol_stateid(struct nfs4_stid *stid) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 1180 | { |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 1181 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
J. Bruce Fields | 4665e2b | 2011-09-06 14:50:49 -0400 | [diff] [blame] | 1182 | |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 1183 | put_clnt_odstate(stp->st_clnt_odstate); |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 1184 | release_all_access(stp); |
Jeff Layton | d3134b1 | 2014-07-29 21:34:32 -0400 | [diff] [blame] | 1185 | if (stp->st_stateowner) |
| 1186 | nfs4_put_stateowner(stp->st_stateowner); |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 1187 | kmem_cache_free(stateid_slab, stid); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 1188 | } |
| 1189 | |
Jeff Layton | b49e084 | 2014-07-29 21:34:11 -0400 | [diff] [blame] | 1190 | static void nfs4_free_lock_stateid(struct nfs4_stid *stid) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 1191 | { |
Jeff Layton | b49e084 | 2014-07-29 21:34:11 -0400 | [diff] [blame] | 1192 | struct nfs4_ol_stateid *stp = openlockstateid(stid); |
| 1193 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 1194 | struct file *file; |
| 1195 | |
Jeff Layton | b49e084 | 2014-07-29 21:34:11 -0400 | [diff] [blame] | 1196 | file = find_any_file(stp->st_stid.sc_file); |
| 1197 | if (file) |
| 1198 | filp_close(file, (fl_owner_t)lo); |
| 1199 | nfs4_free_ol_stateid(stid); |
| 1200 | } |
| 1201 | |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1202 | /* |
| 1203 | * Put the persistent reference to an already unhashed generic stateid, while |
| 1204 | * holding the cl_lock. If it's the last reference, then put it onto the |
| 1205 | * reaplist for later destruction. |
| 1206 | */ |
| 1207 | static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, |
| 1208 | struct list_head *reaplist) |
| 1209 | { |
| 1210 | struct nfs4_stid *s = &stp->st_stid; |
| 1211 | struct nfs4_client *clp = s->sc_client; |
| 1212 | |
| 1213 | lockdep_assert_held(&clp->cl_lock); |
| 1214 | |
| 1215 | WARN_ON_ONCE(!list_empty(&stp->st_locks)); |
| 1216 | |
| 1217 | if (!atomic_dec_and_test(&s->sc_count)) { |
| 1218 | wake_up_all(&close_wq); |
| 1219 | return; |
| 1220 | } |
| 1221 | |
| 1222 | idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); |
| 1223 | list_add(&stp->st_locks, reaplist); |
| 1224 | } |
| 1225 | |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1226 | static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) |
Jeff Layton | 3c1c995 | 2014-07-29 21:34:39 -0400 | [diff] [blame] | 1227 | { |
Chuck Lever | f46c445 | 2016-10-29 18:19:03 -0400 | [diff] [blame] | 1228 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
Jeff Layton | 3c1c995 | 2014-07-29 21:34:39 -0400 | [diff] [blame] | 1229 | |
| 1230 | list_del_init(&stp->st_locks); |
Christoph Hellwig | cd61c52 | 2014-08-14 08:44:57 +0200 | [diff] [blame] | 1231 | nfs4_unhash_stid(&stp->st_stid); |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1232 | return unhash_ol_stateid(stp); |
Jeff Layton | 3c1c995 | 2014-07-29 21:34:39 -0400 | [diff] [blame] | 1233 | } |
| 1234 | |
Jeff Layton | 5adfd88 | 2014-07-29 21:34:31 -0400 | [diff] [blame] | 1235 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
Jeff Layton | b49e084 | 2014-07-29 21:34:11 -0400 | [diff] [blame] | 1236 | { |
Chuck Lever | f46c445 | 2016-10-29 18:19:03 -0400 | [diff] [blame] | 1237 | struct nfs4_client *clp = stp->st_stid.sc_client; |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1238 | bool unhashed; |
Jeff Layton | 1c755dc | 2014-07-29 21:34:12 -0400 | [diff] [blame] | 1239 | |
Chuck Lever | f46c445 | 2016-10-29 18:19:03 -0400 | [diff] [blame] | 1240 | spin_lock(&clp->cl_lock); |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1241 | unhashed = unhash_lock_stateid(stp); |
Chuck Lever | f46c445 | 2016-10-29 18:19:03 -0400 | [diff] [blame] | 1242 | spin_unlock(&clp->cl_lock); |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1243 | if (unhashed) |
| 1244 | nfs4_put_stid(&stp->st_stid); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 1245 | } |
| 1246 | |
Trond Myklebust | c58c661 | 2014-07-29 21:34:35 -0400 | [diff] [blame] | 1247 | static void unhash_lockowner_locked(struct nfs4_lockowner *lo) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 1248 | { |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 1249 | struct nfs4_client *clp = lo->lo_owner.so_client; |
Trond Myklebust | c58c661 | 2014-07-29 21:34:35 -0400 | [diff] [blame] | 1250 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 1251 | lockdep_assert_held(&clp->cl_lock); |
Trond Myklebust | c58c661 | 2014-07-29 21:34:35 -0400 | [diff] [blame] | 1252 | |
Jeff Layton | 8f4b54c | 2014-07-29 21:34:29 -0400 | [diff] [blame] | 1253 | list_del_init(&lo->lo_owner.so_strhash); |
| 1254 | } |
| 1255 | |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1256 | /* |
| 1257 | * Free a list of generic stateids that were collected earlier after being |
| 1258 | * fully unhashed. |
| 1259 | */ |
| 1260 | static void |
| 1261 | free_ol_stateid_reaplist(struct list_head *reaplist) |
| 1262 | { |
| 1263 | struct nfs4_ol_stateid *stp; |
Kinglong Mee | fb94d76 | 2014-08-05 21:20:27 +0800 | [diff] [blame] | 1264 | struct nfs4_file *fp; |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1265 | |
| 1266 | might_sleep(); |
| 1267 | |
| 1268 | while (!list_empty(reaplist)) { |
| 1269 | stp = list_first_entry(reaplist, struct nfs4_ol_stateid, |
| 1270 | st_locks); |
| 1271 | list_del(&stp->st_locks); |
Kinglong Mee | fb94d76 | 2014-08-05 21:20:27 +0800 | [diff] [blame] | 1272 | fp = stp->st_stid.sc_file; |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1273 | stp->st_stid.sc_free(&stp->st_stid); |
Kinglong Mee | fb94d76 | 2014-08-05 21:20:27 +0800 | [diff] [blame] | 1274 | if (fp) |
| 1275 | put_nfs4_file(fp); |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1276 | } |
| 1277 | } |
| 1278 | |
Jeff Layton | d83017f | 2014-07-29 21:34:42 -0400 | [diff] [blame] | 1279 | static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, |
| 1280 | struct list_head *reaplist) |
Trond Myklebust | 3c87b9b | 2014-06-30 11:48:38 -0400 | [diff] [blame] | 1281 | { |
| 1282 | struct nfs4_ol_stateid *stp; |
| 1283 | |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1284 | lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); |
| 1285 | |
Trond Myklebust | 3c87b9b | 2014-06-30 11:48:38 -0400 | [diff] [blame] | 1286 | while (!list_empty(&open_stp->st_locks)) { |
| 1287 | stp = list_entry(open_stp->st_locks.next, |
| 1288 | struct nfs4_ol_stateid, st_locks); |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1289 | WARN_ON(!unhash_lock_stateid(stp)); |
Jeff Layton | d83017f | 2014-07-29 21:34:42 -0400 | [diff] [blame] | 1290 | put_ol_stateid_locked(stp, reaplist); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 1291 | } |
| 1292 | } |
| 1293 | |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1294 | static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, |
Jeff Layton | d83017f | 2014-07-29 21:34:42 -0400 | [diff] [blame] | 1295 | struct list_head *reaplist) |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 1296 | { |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1297 | bool unhashed; |
| 1298 | |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1299 | lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); |
| 1300 | |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1301 | unhashed = unhash_ol_stateid(stp); |
Jeff Layton | d83017f | 2014-07-29 21:34:42 -0400 | [diff] [blame] | 1302 | release_open_stateid_locks(stp, reaplist); |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1303 | return unhashed; |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 1304 | } |
| 1305 | |
| 1306 | static void release_open_stateid(struct nfs4_ol_stateid *stp) |
| 1307 | { |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1308 | LIST_HEAD(reaplist); |
| 1309 | |
| 1310 | spin_lock(&stp->st_stid.sc_client->cl_lock); |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1311 | if (unhash_open_stateid(stp, &reaplist)) |
| 1312 | put_ol_stateid_locked(stp, &reaplist); |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1313 | spin_unlock(&stp->st_stid.sc_client->cl_lock); |
| 1314 | free_ol_stateid_reaplist(&reaplist); |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 1315 | } |
| 1316 | |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 1317 | static void unhash_openowner_locked(struct nfs4_openowner *oo) |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 1318 | { |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 1319 | struct nfs4_client *clp = oo->oo_owner.so_client; |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 1320 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 1321 | lockdep_assert_held(&clp->cl_lock); |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 1322 | |
Jeff Layton | 8f4b54c | 2014-07-29 21:34:29 -0400 | [diff] [blame] | 1323 | list_del_init(&oo->oo_owner.so_strhash); |
| 1324 | list_del_init(&oo->oo_perclient); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 1325 | } |
| 1326 | |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 1327 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
| 1328 | { |
Jeff Layton | 217526e | 2014-07-30 08:27:11 -0400 | [diff] [blame] | 1329 | struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, |
| 1330 | nfsd_net_id); |
| 1331 | struct nfs4_ol_stateid *s; |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 1332 | |
Jeff Layton | 217526e | 2014-07-30 08:27:11 -0400 | [diff] [blame] | 1333 | spin_lock(&nn->client_lock); |
| 1334 | s = oo->oo_last_closed_stid; |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 1335 | if (s) { |
Jeff Layton | d3134b1 | 2014-07-29 21:34:32 -0400 | [diff] [blame] | 1336 | list_del_init(&oo->oo_close_lru); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 1337 | oo->oo_last_closed_stid = NULL; |
| 1338 | } |
Jeff Layton | 217526e | 2014-07-30 08:27:11 -0400 | [diff] [blame] | 1339 | spin_unlock(&nn->client_lock); |
| 1340 | if (s) |
| 1341 | nfs4_put_stid(&s->st_stid); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 1342 | } |
| 1343 | |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1344 | static void release_openowner(struct nfs4_openowner *oo) |
Jeff Layton | 8f4b54c | 2014-07-29 21:34:29 -0400 | [diff] [blame] | 1345 | { |
| 1346 | struct nfs4_ol_stateid *stp; |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 1347 | struct nfs4_client *clp = oo->oo_owner.so_client; |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1348 | struct list_head reaplist; |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 1349 | |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1350 | INIT_LIST_HEAD(&reaplist); |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 1351 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 1352 | spin_lock(&clp->cl_lock); |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 1353 | unhash_openowner_locked(oo); |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1354 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
| 1355 | stp = list_first_entry(&oo->oo_owner.so_stateids, |
| 1356 | struct nfs4_ol_stateid, st_perstateowner); |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 1357 | if (unhash_open_stateid(stp, &reaplist)) |
| 1358 | put_ol_stateid_locked(stp, &reaplist); |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1359 | } |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 1360 | spin_unlock(&clp->cl_lock); |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 1361 | free_ol_stateid_reaplist(&reaplist); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 1362 | release_last_closed_stateid(oo); |
Jeff Layton | 6b180f0 | 2014-07-29 21:34:26 -0400 | [diff] [blame] | 1363 | nfs4_put_stateowner(&oo->oo_owner); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 1364 | } |
| 1365 | |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 1366 | static inline int |
| 1367 | hash_sessionid(struct nfs4_sessionid *sessionid) |
| 1368 | { |
| 1369 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; |
| 1370 | |
| 1371 | return sid->sequence % SESSION_HASH_SIZE; |
| 1372 | } |
| 1373 | |
Mark Salter | 135dd00 | 2015-04-06 09:46:00 -0400 | [diff] [blame] | 1374 | #ifdef CONFIG_SUNRPC_DEBUG |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 1375 | static inline void |
| 1376 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) |
| 1377 | { |
| 1378 | u32 *ptr = (u32 *)(&sessionid->data[0]); |
| 1379 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); |
| 1380 | } |
Trond Myklebust | 8f199b8 | 2012-03-20 15:11:17 -0400 | [diff] [blame] | 1381 | #else |
| 1382 | static inline void |
| 1383 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) |
| 1384 | { |
| 1385 | } |
| 1386 | #endif |
| 1387 | |
J. Bruce Fields | 9411b1d | 2013-04-01 16:37:12 -0400 | [diff] [blame] | 1388 | /* |
| 1389 | * Bump the seqid on cstate->replay_owner, and clear replay_owner if it |
| 1390 | * won't be used for replay. |
| 1391 | */ |
| 1392 | void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) |
| 1393 | { |
| 1394 | struct nfs4_stateowner *so = cstate->replay_owner; |
| 1395 | |
| 1396 | if (nfserr == nfserr_replay_me) |
| 1397 | return; |
| 1398 | |
| 1399 | if (!seqid_mutating_err(ntohl(nfserr))) { |
Jeff Layton | 58fb12e | 2014-07-29 21:34:27 -0400 | [diff] [blame] | 1400 | nfsd4_cstate_clear_replay(cstate); |
J. Bruce Fields | 9411b1d | 2013-04-01 16:37:12 -0400 | [diff] [blame] | 1401 | return; |
| 1402 | } |
| 1403 | if (!so) |
| 1404 | return; |
| 1405 | if (so->so_is_open_owner) |
| 1406 | release_last_closed_stateid(openowner(so)); |
| 1407 | so->so_seqid++; |
| 1408 | return; |
| 1409 | } |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 1410 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1411 | static void |
| 1412 | gen_sessionid(struct nfsd4_session *ses) |
| 1413 | { |
| 1414 | struct nfs4_client *clp = ses->se_client; |
| 1415 | struct nfsd4_sessionid *sid; |
| 1416 | |
| 1417 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; |
| 1418 | sid->clientid = clp->cl_clientid; |
| 1419 | sid->sequence = current_sessionid++; |
| 1420 | sid->reserved = 0; |
| 1421 | } |
| 1422 | |
| 1423 | /* |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 1424 | * The protocol defines ca_maxresponssize_cached to include the size of |
| 1425 | * the rpc header, but all we need to cache is the data starting after |
| 1426 | * the end of the initial SEQUENCE operation--the rest we regenerate |
| 1427 | * each time. Therefore we can advertise a ca_maxresponssize_cached |
| 1428 | * value that is the number of bytes in our cache plus a few additional |
| 1429 | * bytes. In order to stay on the safe side, and not promise more than |
| 1430 | * we can cache, those additional bytes must be the minimum possible: 24 |
| 1431 | * bytes of rpc header (xid through accept state, with AUTH_NULL |
| 1432 | * verifier), 12 for the compound header (with zero-length tag), and 44 |
| 1433 | * for the SEQUENCE op response: |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1434 | */ |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 1435 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) |
| 1436 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1437 | static void |
| 1438 | free_session_slots(struct nfsd4_session *ses) |
| 1439 | { |
| 1440 | int i; |
| 1441 | |
| 1442 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) |
| 1443 | kfree(ses->se_slots[i]); |
| 1444 | } |
| 1445 | |
J. Bruce Fields | efe0cb6 | 2009-10-24 20:52:16 -0400 | [diff] [blame] | 1446 | /* |
| 1447 | * We don't actually need to cache the rpc and session headers, so we |
| 1448 | * can allocate a little less for each slot: |
| 1449 | */ |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 1450 | static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) |
J. Bruce Fields | efe0cb6 | 2009-10-24 20:52:16 -0400 | [diff] [blame] | 1451 | { |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 1452 | u32 size; |
J. Bruce Fields | efe0cb6 | 2009-10-24 20:52:16 -0400 | [diff] [blame] | 1453 | |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 1454 | if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) |
| 1455 | size = 0; |
| 1456 | else |
| 1457 | size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; |
| 1458 | return size + sizeof(struct nfsd4_slot); |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1459 | } |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1460 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1461 | /* |
| 1462 | * XXX: If we run out of reserved DRC memory we could (up to a point) |
| 1463 | * re-negotiate active sessions and reduce their slot usage to make |
Justin P. Mattock | 42b2aa8 | 2011-11-28 20:31:00 -0800 | [diff] [blame] | 1464 | * room for new connections. For now we just fail the create session. |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1465 | */ |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 1466 | static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1467 | { |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 1468 | u32 slotsize = slot_bytes(ca); |
| 1469 | u32 num = ca->maxreqs; |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1470 | int avail; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1471 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1472 | spin_lock(&nfsd_drc_lock); |
Zhang Yanfei | 697ce9b | 2013-02-22 16:35:47 -0800 | [diff] [blame] | 1473 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
| 1474 | nfsd_drc_max_mem - nfsd_drc_mem_used); |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1475 | num = min_t(int, num, avail / slotsize); |
| 1476 | nfsd_drc_mem_used += num * slotsize; |
| 1477 | spin_unlock(&nfsd_drc_lock); |
| 1478 | |
| 1479 | return num; |
| 1480 | } |
| 1481 | |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 1482 | static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1483 | { |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 1484 | int slotsize = slot_bytes(ca); |
| 1485 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1486 | spin_lock(&nfsd_drc_lock); |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 1487 | nfsd_drc_mem_used -= slotsize * ca->maxreqs; |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1488 | spin_unlock(&nfsd_drc_lock); |
| 1489 | } |
| 1490 | |
Kinglong Mee | 60810e5 | 2014-01-01 00:35:47 +0800 | [diff] [blame] | 1491 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, |
| 1492 | struct nfsd4_channel_attrs *battrs) |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1493 | { |
Kinglong Mee | 60810e5 | 2014-01-01 00:35:47 +0800 | [diff] [blame] | 1494 | int numslots = fattrs->maxreqs; |
| 1495 | int slotsize = slot_bytes(fattrs); |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1496 | struct nfsd4_session *new; |
| 1497 | int mem, i; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1498 | |
J. Bruce Fields | c23753d | 2010-09-27 16:22:30 -0400 | [diff] [blame] | 1499 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1500 | + sizeof(struct nfsd4_session) > PAGE_SIZE); |
| 1501 | mem = numslots * sizeof(struct nfsd4_slot *); |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1502 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1503 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1504 | if (!new) |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1505 | return NULL; |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1506 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1507 | for (i = 0; i < numslots; i++) { |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 1508 | new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1509 | if (!new->se_slots[i]) |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1510 | goto out_free; |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1511 | } |
Kinglong Mee | 60810e5 | 2014-01-01 00:35:47 +0800 | [diff] [blame] | 1512 | |
| 1513 | memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); |
| 1514 | memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); |
| 1515 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1516 | return new; |
| 1517 | out_free: |
| 1518 | while (i--) |
| 1519 | kfree(new->se_slots[i]); |
| 1520 | kfree(new); |
| 1521 | return NULL; |
| 1522 | } |
| 1523 | |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 1524 | static void free_conn(struct nfsd4_conn *c) |
| 1525 | { |
| 1526 | svc_xprt_put(c->cn_xprt); |
| 1527 | kfree(c); |
| 1528 | } |
| 1529 | |
| 1530 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
| 1531 | { |
| 1532 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); |
| 1533 | struct nfs4_client *clp = c->cn_session->se_client; |
| 1534 | |
| 1535 | spin_lock(&clp->cl_lock); |
| 1536 | if (!list_empty(&c->cn_persession)) { |
| 1537 | list_del(&c->cn_persession); |
| 1538 | free_conn(c); |
| 1539 | } |
J. Bruce Fields | eea4980 | 2010-11-18 08:34:12 -0500 | [diff] [blame] | 1540 | nfsd4_probe_callback(clp); |
J. Bruce Fields | 2e4b723 | 2013-03-08 09:30:43 -0500 | [diff] [blame] | 1541 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 1542 | } |
| 1543 | |
J. Bruce Fields | d29c374 | 2010-06-15 17:34:11 -0400 | [diff] [blame] | 1544 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 1545 | { |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 1546 | struct nfsd4_conn *conn; |
| 1547 | |
| 1548 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
| 1549 | if (!conn) |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 1550 | return NULL; |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 1551 | svc_xprt_get(rqstp->rq_xprt); |
| 1552 | conn->cn_xprt = rqstp->rq_xprt; |
J. Bruce Fields | d29c374 | 2010-06-15 17:34:11 -0400 | [diff] [blame] | 1553 | conn->cn_flags = flags; |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 1554 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
| 1555 | return conn; |
| 1556 | } |
| 1557 | |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 1558 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
| 1559 | { |
| 1560 | conn->cn_session = ses; |
| 1561 | list_add(&conn->cn_persession, &ses->se_conns); |
| 1562 | } |
| 1563 | |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 1564 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
| 1565 | { |
| 1566 | struct nfs4_client *clp = ses->se_client; |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 1567 | |
| 1568 | spin_lock(&clp->cl_lock); |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 1569 | __nfsd4_hash_conn(conn, ses); |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 1570 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 1571 | } |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 1572 | |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 1573 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 1574 | { |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 1575 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 1576 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 1577 | } |
| 1578 | |
J. Bruce Fields | e1ff371 | 2012-09-11 17:10:25 -0400 | [diff] [blame] | 1579 | static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 1580 | { |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 1581 | int ret; |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 1582 | |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 1583 | nfsd4_hash_conn(conn, ses); |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 1584 | ret = nfsd4_register_conn(conn); |
| 1585 | if (ret) |
| 1586 | /* oops; xprt is already down: */ |
| 1587 | nfsd4_conn_lost(&conn->cn_xpt_user); |
J. Bruce Fields | 57a3714 | 2014-07-18 15:06:47 -0400 | [diff] [blame] | 1588 | /* We may have gained or lost a callback channel: */ |
| 1589 | nfsd4_probe_callback_sync(ses->se_client); |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 1590 | } |
| 1591 | |
J. Bruce Fields | e1ff371 | 2012-09-11 17:10:25 -0400 | [diff] [blame] | 1592 | static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 1593 | { |
| 1594 | u32 dir = NFS4_CDFC4_FORE; |
| 1595 | |
J. Bruce Fields | e1ff371 | 2012-09-11 17:10:25 -0400 | [diff] [blame] | 1596 | if (cses->flags & SESSION4_BACK_CHAN) |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 1597 | dir |= NFS4_CDFC4_BACK; |
J. Bruce Fields | e1ff371 | 2012-09-11 17:10:25 -0400 | [diff] [blame] | 1598 | return alloc_conn(rqstp, dir); |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 1599 | } |
| 1600 | |
| 1601 | /* must be called under client_lock */ |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 1602 | static void nfsd4_del_conns(struct nfsd4_session *s) |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 1603 | { |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 1604 | struct nfs4_client *clp = s->se_client; |
| 1605 | struct nfsd4_conn *c; |
| 1606 | |
| 1607 | spin_lock(&clp->cl_lock); |
| 1608 | while (!list_empty(&s->se_conns)) { |
| 1609 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); |
| 1610 | list_del_init(&c->cn_persession); |
| 1611 | spin_unlock(&clp->cl_lock); |
| 1612 | |
| 1613 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
| 1614 | free_conn(c); |
| 1615 | |
| 1616 | spin_lock(&clp->cl_lock); |
| 1617 | } |
| 1618 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 1619 | } |
| 1620 | |
J. Bruce Fields | 1377b69 | 2012-09-11 21:42:40 -0400 | [diff] [blame] | 1621 | static void __free_session(struct nfsd4_session *ses) |
| 1622 | { |
J. Bruce Fields | 1377b69 | 2012-09-11 21:42:40 -0400 | [diff] [blame] | 1623 | free_session_slots(ses); |
| 1624 | kfree(ses); |
| 1625 | } |
| 1626 | |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 1627 | static void free_session(struct nfsd4_session *ses) |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 1628 | { |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 1629 | nfsd4_del_conns(ses); |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 1630 | nfsd4_put_drc_mem(&ses->se_fchannel); |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 1631 | __free_session(ses); |
J. Bruce Fields | a827bcb | 2012-09-12 09:51:34 -0400 | [diff] [blame] | 1632 | } |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1633 | |
Fengguang Wu | 135ae82 | 2012-11-10 07:20:25 -0500 | [diff] [blame] | 1634 | static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
J. Bruce Fields | a827bcb | 2012-09-12 09:51:34 -0400 | [diff] [blame] | 1635 | { |
J. Bruce Fields | a827bcb | 2012-09-12 09:51:34 -0400 | [diff] [blame] | 1636 | int idx; |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 1637 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
J. Bruce Fields | a827bcb | 2012-09-12 09:51:34 -0400 | [diff] [blame] | 1638 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1639 | new->se_client = clp; |
| 1640 | gen_sessionid(new); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1641 | |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 1642 | INIT_LIST_HEAD(&new->se_conns); |
| 1643 | |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 1644 | new->se_cb_seq_nr = 1; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1645 | new->se_flags = cses->flags; |
J. Bruce Fields | 8b5ce5c | 2010-10-19 17:31:50 -0400 | [diff] [blame] | 1646 | new->se_cb_prog = cses->callback_prog; |
J. Bruce Fields | c6bb3ca | 2012-11-01 16:31:02 -0400 | [diff] [blame] | 1647 | new->se_cb_sec = cses->cb_sec; |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 1648 | atomic_set(&new->se_ref, 0); |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 1649 | idx = hash_sessionid(&new->se_sessionid); |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 1650 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 1651 | spin_lock(&clp->cl_lock); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1652 | list_add(&new->se_perclnt, &clp->cl_sessions); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 1653 | spin_unlock(&clp->cl_lock); |
Kinglong Mee | 60810e5 | 2014-01-01 00:35:47 +0800 | [diff] [blame] | 1654 | |
Chuck Lever | b0d2e42 | 2014-08-22 15:10:59 -0400 | [diff] [blame] | 1655 | { |
J. Bruce Fields | edd7678 | 2010-06-14 22:26:31 -0400 | [diff] [blame] | 1656 | struct sockaddr *sa = svc_addr(rqstp); |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 1657 | /* |
| 1658 | * This is a little silly; with sessions there's no real |
| 1659 | * use for the callback address. Use the peer address |
| 1660 | * as a reasonable default for now, but consider fixing |
| 1661 | * the rpc client not to require an address in the |
| 1662 | * future: |
| 1663 | */ |
J. Bruce Fields | edd7678 | 2010-06-14 22:26:31 -0400 | [diff] [blame] | 1664 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
| 1665 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); |
J. Bruce Fields | edd7678 | 2010-06-14 22:26:31 -0400 | [diff] [blame] | 1666 | } |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1667 | } |
| 1668 | |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 1669 | /* caller must hold client_lock */ |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 1670 | static struct nfsd4_session * |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 1671 | __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 1672 | { |
| 1673 | struct nfsd4_session *elem; |
| 1674 | int idx; |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 1675 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 1676 | |
Trond Myklebust | 0a880a2 | 2014-07-30 08:27:10 -0400 | [diff] [blame] | 1677 | lockdep_assert_held(&nn->client_lock); |
| 1678 | |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 1679 | dump_sessionid(__func__, sessionid); |
| 1680 | idx = hash_sessionid(sessionid); |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 1681 | /* Search in the appropriate list */ |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 1682 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 1683 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
| 1684 | NFS4_MAX_SESSIONID_LEN)) { |
| 1685 | return elem; |
| 1686 | } |
| 1687 | } |
| 1688 | |
| 1689 | dprintk("%s: session not found\n", __func__); |
| 1690 | return NULL; |
| 1691 | } |
| 1692 | |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 1693 | static struct nfsd4_session * |
| 1694 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, |
| 1695 | __be32 *ret) |
| 1696 | { |
| 1697 | struct nfsd4_session *session; |
| 1698 | __be32 status = nfserr_badsession; |
| 1699 | |
| 1700 | session = __find_in_sessionid_hashtbl(sessionid, net); |
| 1701 | if (!session) |
| 1702 | goto out; |
| 1703 | status = nfsd4_get_session_locked(session); |
| 1704 | if (status) |
| 1705 | session = NULL; |
| 1706 | out: |
| 1707 | *ret = status; |
| 1708 | return session; |
| 1709 | } |
| 1710 | |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 1711 | /* caller must hold client_lock */ |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 1712 | static void |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 1713 | unhash_session(struct nfsd4_session *ses) |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 1714 | { |
Trond Myklebust | 0a880a2 | 2014-07-30 08:27:10 -0400 | [diff] [blame] | 1715 | struct nfs4_client *clp = ses->se_client; |
| 1716 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
| 1717 | |
| 1718 | lockdep_assert_held(&nn->client_lock); |
| 1719 | |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 1720 | list_del(&ses->se_hash); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 1721 | spin_lock(&ses->se_client->cl_lock); |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 1722 | list_del(&ses->se_perclnt); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 1723 | spin_unlock(&ses->se_client->cl_lock); |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 1724 | } |
| 1725 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
| 1727 | static int |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 1728 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | { |
J. Bruce Fields | bbc7f33 | 2015-01-20 11:51:26 -0500 | [diff] [blame] | 1730 | /* |
| 1731 | * We're assuming the clid was not given out from a boot |
| 1732 | * precisely 2^32 (about 136 years) before this one. That seems |
| 1733 | * a safe assumption: |
| 1734 | */ |
| 1735 | if (clid->cl_boot == (u32)nn->boot_time) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | return 0; |
Andy Adamson | 60adfc5 | 2009-04-03 08:28:50 +0300 | [diff] [blame] | 1737 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 1738 | clid->cl_boot, clid->cl_id, nn->boot_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | return 1; |
| 1740 | } |
| 1741 | |
| 1742 | /* |
| 1743 | * XXX Should we use a slab cache ? |
| 1744 | * This type of memory management is somewhat inefficient, but we use it |
| 1745 | * anyway since SETCLIENTID is not a common operation. |
| 1746 | */ |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1747 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | { |
| 1749 | struct nfs4_client *clp; |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 1750 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1752 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
| 1753 | if (clp == NULL) |
| 1754 | return NULL; |
Thomas Meyer | 67114fe | 2011-11-17 23:43:40 +0100 | [diff] [blame] | 1755 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 1756 | if (clp->cl_name.data == NULL) |
| 1757 | goto err_no_name; |
| 1758 | clp->cl_ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
| 1759 | OWNER_HASH_SIZE, GFP_KERNEL); |
| 1760 | if (!clp->cl_ownerstr_hashtbl) |
| 1761 | goto err_no_hashtbl; |
| 1762 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
| 1763 | INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1764 | clp->cl_name.len = name.len; |
Trond Myklebust | 5694c93 | 2014-04-18 14:43:56 -0400 | [diff] [blame] | 1765 | INIT_LIST_HEAD(&clp->cl_sessions); |
| 1766 | idr_init(&clp->cl_stateids); |
| 1767 | atomic_set(&clp->cl_refcount, 0); |
| 1768 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
| 1769 | INIT_LIST_HEAD(&clp->cl_idhash); |
| 1770 | INIT_LIST_HEAD(&clp->cl_openowners); |
| 1771 | INIT_LIST_HEAD(&clp->cl_delegations); |
| 1772 | INIT_LIST_HEAD(&clp->cl_lru); |
Trond Myklebust | 5694c93 | 2014-04-18 14:43:56 -0400 | [diff] [blame] | 1773 | INIT_LIST_HEAD(&clp->cl_revoked); |
Christoph Hellwig | 9cf514c | 2014-05-05 13:11:59 +0200 | [diff] [blame] | 1774 | #ifdef CONFIG_NFSD_PNFS |
| 1775 | INIT_LIST_HEAD(&clp->cl_lo_states); |
| 1776 | #endif |
Trond Myklebust | 5694c93 | 2014-04-18 14:43:56 -0400 | [diff] [blame] | 1777 | spin_lock_init(&clp->cl_lock); |
| 1778 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | return clp; |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 1780 | err_no_hashtbl: |
| 1781 | kfree(clp->cl_name.data); |
| 1782 | err_no_name: |
| 1783 | kfree(clp); |
| 1784 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | } |
| 1786 | |
Trond Myklebust | 4dd86e15 | 2014-04-18 14:43:58 -0400 | [diff] [blame] | 1787 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1788 | free_client(struct nfs4_client *clp) |
| 1789 | { |
J. Bruce Fields | 792c95d | 2010-10-12 19:55:25 -0400 | [diff] [blame] | 1790 | while (!list_empty(&clp->cl_sessions)) { |
| 1791 | struct nfsd4_session *ses; |
| 1792 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, |
| 1793 | se_perclnt); |
| 1794 | list_del(&ses->se_perclnt); |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 1795 | WARN_ON_ONCE(atomic_read(&ses->se_ref)); |
| 1796 | free_session(ses); |
J. Bruce Fields | 792c95d | 2010-10-12 19:55:25 -0400 | [diff] [blame] | 1797 | } |
Trond Myklebust | 4cb57e3 | 2014-04-18 14:43:57 -0400 | [diff] [blame] | 1798 | rpc_destroy_wait_queue(&clp->cl_cb_waitq); |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 1799 | free_svc_cred(&clp->cl_cred); |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 1800 | kfree(clp->cl_ownerstr_hashtbl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | kfree(clp->cl_name.data); |
majianpeng | 2d32b29 | 2013-01-29 13:16:06 +0800 | [diff] [blame] | 1802 | idr_destroy(&clp->cl_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | kfree(clp); |
| 1804 | } |
| 1805 | |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 1806 | /* must be called under the client_lock */ |
Trond Myklebust | 4beb345 | 2014-07-30 08:27:02 -0400 | [diff] [blame] | 1807 | static void |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 1808 | unhash_client_locked(struct nfs4_client *clp) |
| 1809 | { |
Trond Myklebust | 4beb345 | 2014-07-30 08:27:02 -0400 | [diff] [blame] | 1810 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
J. Bruce Fields | 792c95d | 2010-10-12 19:55:25 -0400 | [diff] [blame] | 1811 | struct nfsd4_session *ses; |
| 1812 | |
Trond Myklebust | 0a880a2 | 2014-07-30 08:27:10 -0400 | [diff] [blame] | 1813 | lockdep_assert_held(&nn->client_lock); |
| 1814 | |
Trond Myklebust | 4beb345 | 2014-07-30 08:27:02 -0400 | [diff] [blame] | 1815 | /* Mark the client as expired! */ |
| 1816 | clp->cl_time = 0; |
| 1817 | /* Make it invisible */ |
| 1818 | if (!list_empty(&clp->cl_idhash)) { |
| 1819 | list_del_init(&clp->cl_idhash); |
| 1820 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
| 1821 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
| 1822 | else |
| 1823 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
| 1824 | } |
| 1825 | list_del_init(&clp->cl_lru); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 1826 | spin_lock(&clp->cl_lock); |
J. Bruce Fields | 792c95d | 2010-10-12 19:55:25 -0400 | [diff] [blame] | 1827 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
| 1828 | list_del_init(&ses->se_hash); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 1829 | spin_unlock(&clp->cl_lock); |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 1830 | } |
| 1831 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | static void |
Trond Myklebust | 4beb345 | 2014-07-30 08:27:02 -0400 | [diff] [blame] | 1833 | unhash_client(struct nfs4_client *clp) |
| 1834 | { |
| 1835 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
| 1836 | |
| 1837 | spin_lock(&nn->client_lock); |
| 1838 | unhash_client_locked(clp); |
| 1839 | spin_unlock(&nn->client_lock); |
| 1840 | } |
| 1841 | |
Jeff Layton | 97403d9 | 2014-07-30 08:27:12 -0400 | [diff] [blame] | 1842 | static __be32 mark_client_expired_locked(struct nfs4_client *clp) |
| 1843 | { |
| 1844 | if (atomic_read(&clp->cl_refcount)) |
| 1845 | return nfserr_jukebox; |
| 1846 | unhash_client_locked(clp); |
| 1847 | return nfs_ok; |
| 1848 | } |
| 1849 | |
Trond Myklebust | 4beb345 | 2014-07-30 08:27:02 -0400 | [diff] [blame] | 1850 | static void |
| 1851 | __destroy_client(struct nfs4_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 1853 | struct nfs4_openowner *oo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | struct nfs4_delegation *dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | struct list_head reaplist; |
| 1856 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | INIT_LIST_HEAD(&reaplist); |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 1858 | spin_lock(&state_lock); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1859 | while (!list_empty(&clp->cl_delegations)) { |
| 1860 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); |
Jeff Layton | 3fcbbd2 | 2015-08-24 12:41:48 -0400 | [diff] [blame] | 1861 | WARN_ON(!unhash_delegation_locked(dp)); |
Jeff Layton | 4269067 | 2014-07-25 07:34:20 -0400 | [diff] [blame] | 1862 | list_add(&dp->dl_recall_lru, &reaplist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | } |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 1864 | spin_unlock(&state_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | while (!list_empty(&reaplist)) { |
| 1866 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
Jeff Layton | 4269067 | 2014-07-25 07:34:20 -0400 | [diff] [blame] | 1867 | list_del_init(&dp->dl_recall_lru); |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 1868 | put_clnt_odstate(dp->dl_clnt_odstate); |
Jeff Layton | afbda40 | 2014-08-09 10:22:41 -0400 | [diff] [blame] | 1869 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 1870 | nfs4_put_stid(&dp->dl_stid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | } |
Jeff Layton | 2d4a532 | 2014-07-25 07:34:21 -0400 | [diff] [blame] | 1872 | while (!list_empty(&clp->cl_revoked)) { |
Andrew Elble | c876486 | 2015-02-25 17:46:27 -0500 | [diff] [blame] | 1873 | dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); |
Jeff Layton | 2d4a532 | 2014-07-25 07:34:21 -0400 | [diff] [blame] | 1874 | list_del_init(&dp->dl_recall_lru); |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 1875 | nfs4_put_stid(&dp->dl_stid); |
Benny Halevy | 956c4fe | 2013-10-29 11:39:12 +0200 | [diff] [blame] | 1876 | } |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1877 | while (!list_empty(&clp->cl_openowners)) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 1878 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
Kinglong Mee | b5971af | 2014-08-22 10:18:43 -0400 | [diff] [blame] | 1879 | nfs4_get_stateowner(&oo->oo_owner); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 1880 | release_openowner(oo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | } |
Christoph Hellwig | 9cf514c | 2014-05-05 13:11:59 +0200 | [diff] [blame] | 1882 | nfsd4_return_all_client_layouts(clp); |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1883 | nfsd4_shutdown_callback(clp); |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 1884 | if (clp->cl_cb_conn.cb_xprt) |
| 1885 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 1886 | free_client(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | } |
| 1888 | |
Trond Myklebust | 4beb345 | 2014-07-30 08:27:02 -0400 | [diff] [blame] | 1889 | static void |
| 1890 | destroy_client(struct nfs4_client *clp) |
| 1891 | { |
| 1892 | unhash_client(clp); |
| 1893 | __destroy_client(clp); |
| 1894 | } |
| 1895 | |
J. Bruce Fields | 0d22f68 | 2012-09-26 11:36:16 -0400 | [diff] [blame] | 1896 | static void expire_client(struct nfs4_client *clp) |
| 1897 | { |
Trond Myklebust | 4beb345 | 2014-07-30 08:27:02 -0400 | [diff] [blame] | 1898 | unhash_client(clp); |
J. Bruce Fields | 0d22f68 | 2012-09-26 11:36:16 -0400 | [diff] [blame] | 1899 | nfsd4_client_record_remove(clp); |
Trond Myklebust | 4beb345 | 2014-07-30 08:27:02 -0400 | [diff] [blame] | 1900 | __destroy_client(clp); |
J. Bruce Fields | 0d22f68 | 2012-09-26 11:36:16 -0400 | [diff] [blame] | 1901 | } |
| 1902 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1903 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
| 1904 | { |
| 1905 | memcpy(target->cl_verifier.data, source->data, |
| 1906 | sizeof(target->cl_verifier.data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1907 | } |
| 1908 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1909 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
| 1910 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
| 1912 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; |
| 1913 | } |
| 1914 | |
J. Bruce Fields | 5004385 | 2015-11-20 15:58:37 -0500 | [diff] [blame] | 1915 | int strdup_if_nonnull(char **target, char *source) |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1916 | { |
J. Bruce Fields | 5004385 | 2015-11-20 15:58:37 -0500 | [diff] [blame] | 1917 | if (source) { |
| 1918 | *target = kstrdup(source, GFP_KERNEL); |
| 1919 | if (!*target) |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 1920 | return -ENOMEM; |
| 1921 | } else |
J. Bruce Fields | 5004385 | 2015-11-20 15:58:37 -0500 | [diff] [blame] | 1922 | *target = NULL; |
| 1923 | return 0; |
| 1924 | } |
| 1925 | |
| 1926 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
| 1927 | { |
| 1928 | int ret; |
| 1929 | |
| 1930 | ret = strdup_if_nonnull(&target->cr_principal, source->cr_principal); |
| 1931 | if (ret) |
| 1932 | return ret; |
J. Bruce Fields | 414ca01 | 2015-11-20 10:48:02 -0500 | [diff] [blame] | 1933 | ret = strdup_if_nonnull(&target->cr_raw_principal, |
| 1934 | source->cr_raw_principal); |
| 1935 | if (ret) |
| 1936 | return ret; |
J. Bruce Fields | d5497fc | 2012-05-14 22:06:49 -0400 | [diff] [blame] | 1937 | target->cr_flavor = source->cr_flavor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | target->cr_uid = source->cr_uid; |
| 1939 | target->cr_gid = source->cr_gid; |
| 1940 | target->cr_group_info = source->cr_group_info; |
| 1941 | get_group_info(target->cr_group_info); |
J. Bruce Fields | 0dc1531 | 2013-05-14 16:07:13 -0400 | [diff] [blame] | 1942 | target->cr_gss_mech = source->cr_gss_mech; |
| 1943 | if (source->cr_gss_mech) |
| 1944 | gss_mech_get(source->cr_gss_mech); |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 1945 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | } |
| 1947 | |
Rasmus Villemoes | ef17af2 | 2014-12-05 16:40:07 +0100 | [diff] [blame] | 1948 | static int |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 1949 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
| 1950 | { |
Rasmus Villemoes | ef17af2 | 2014-12-05 16:40:07 +0100 | [diff] [blame] | 1951 | if (o1->len < o2->len) |
| 1952 | return -1; |
| 1953 | if (o1->len > o2->len) |
| 1954 | return 1; |
| 1955 | return memcmp(o1->data, o2->data, o1->len); |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 1956 | } |
| 1957 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1958 | static int same_name(const char *n1, const char *n2) |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1959 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1960 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | } |
| 1962 | |
| 1963 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1964 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
| 1965 | { |
| 1966 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | } |
| 1968 | |
| 1969 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1970 | same_clid(clientid_t *cl1, clientid_t *cl2) |
| 1971 | { |
| 1972 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | } |
| 1974 | |
J. Bruce Fields | 8fbba96 | 2012-05-14 21:20:54 -0400 | [diff] [blame] | 1975 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
| 1976 | { |
| 1977 | int i; |
| 1978 | |
| 1979 | if (g1->ngroups != g2->ngroups) |
| 1980 | return false; |
| 1981 | for (i=0; i<g1->ngroups; i++) |
Alexey Dobriyan | 81243ea | 2016-10-07 17:03:12 -0700 | [diff] [blame] | 1982 | if (!gid_eq(g1->gid[i], g2->gid[i])) |
J. Bruce Fields | 8fbba96 | 2012-05-14 21:20:54 -0400 | [diff] [blame] | 1983 | return false; |
| 1984 | return true; |
| 1985 | } |
| 1986 | |
J. Bruce Fields | 68eb350 | 2012-08-21 12:48:30 -0400 | [diff] [blame] | 1987 | /* |
| 1988 | * RFC 3530 language requires clid_inuse be returned when the |
| 1989 | * "principal" associated with a requests differs from that previously |
| 1990 | * used. We use uid, gid's, and gss principal string as our best |
| 1991 | * approximation. We also don't want to allow non-gss use of a client |
| 1992 | * established using gss: in theory cr_principal should catch that |
| 1993 | * change, but in practice cr_principal can be null even in the gss case |
| 1994 | * since gssd doesn't always pass down a principal string. |
| 1995 | */ |
| 1996 | static bool is_gss_cred(struct svc_cred *cr) |
| 1997 | { |
| 1998 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ |
| 1999 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); |
| 2000 | } |
| 2001 | |
| 2002 | |
Vivek Trivedi | 5559b50 | 2012-07-24 21:18:20 +0530 | [diff] [blame] | 2003 | static bool |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2004 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
| 2005 | { |
J. Bruce Fields | 68eb350 | 2012-08-21 12:48:30 -0400 | [diff] [blame] | 2006 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
Eric W. Biederman | 6fab877 | 2013-02-02 06:53:11 -0800 | [diff] [blame] | 2007 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
| 2008 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) |
J. Bruce Fields | 8fbba96 | 2012-05-14 21:20:54 -0400 | [diff] [blame] | 2009 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
| 2010 | return false; |
| 2011 | if (cr1->cr_principal == cr2->cr_principal) |
| 2012 | return true; |
| 2013 | if (!cr1->cr_principal || !cr2->cr_principal) |
| 2014 | return false; |
Vivek Trivedi | 5559b50 | 2012-07-24 21:18:20 +0530 | [diff] [blame] | 2015 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2016 | } |
| 2017 | |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2018 | static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) |
| 2019 | { |
| 2020 | struct svc_cred *cr = &rqstp->rq_cred; |
| 2021 | u32 service; |
| 2022 | |
J. Bruce Fields | c472059 | 2013-08-07 11:41:49 -0400 | [diff] [blame] | 2023 | if (!cr->cr_gss_mech) |
| 2024 | return false; |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2025 | service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); |
| 2026 | return service == RPC_GSS_SVC_INTEGRITY || |
| 2027 | service == RPC_GSS_SVC_PRIVACY; |
| 2028 | } |
| 2029 | |
Andrew Elble | dedeb13 | 2016-06-15 12:52:08 -0400 | [diff] [blame] | 2030 | bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2031 | { |
| 2032 | struct svc_cred *cr = &rqstp->rq_cred; |
| 2033 | |
| 2034 | if (!cl->cl_mach_cred) |
| 2035 | return true; |
| 2036 | if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) |
| 2037 | return false; |
| 2038 | if (!svc_rqst_integrity_protected(rqstp)) |
| 2039 | return false; |
J. Bruce Fields | 414ca01 | 2015-11-20 10:48:02 -0500 | [diff] [blame] | 2040 | if (cl->cl_cred.cr_raw_principal) |
| 2041 | return 0 == strcmp(cl->cl_cred.cr_raw_principal, |
| 2042 | cr->cr_raw_principal); |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2043 | if (!cr->cr_principal) |
| 2044 | return false; |
| 2045 | return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); |
| 2046 | } |
| 2047 | |
Jeff Layton | 294ac32 | 2014-07-30 08:27:15 -0400 | [diff] [blame] | 2048 | static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) |
J. Bruce Fields | deda2fa | 2007-11-19 20:31:04 -0500 | [diff] [blame] | 2049 | { |
Chuck Lever | ab4684d | 2012-03-02 17:13:50 -0500 | [diff] [blame] | 2050 | __be32 verf[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2051 | |
Jeff Layton | f419992 | 2014-06-17 07:44:11 -0400 | [diff] [blame] | 2052 | /* |
| 2053 | * This is opaque to client, so no need to byte-swap. Use |
| 2054 | * __force to keep sparse happy |
| 2055 | */ |
| 2056 | verf[0] = (__force __be32)get_seconds(); |
Kinglong Mee | 19311aa8 | 2015-07-18 07:33:31 +0800 | [diff] [blame] | 2057 | verf[1] = (__force __be32)nn->clverifier_counter++; |
Chuck Lever | ab4684d | 2012-03-02 17:13:50 -0500 | [diff] [blame] | 2058 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | } |
| 2060 | |
Jeff Layton | 294ac32 | 2014-07-30 08:27:15 -0400 | [diff] [blame] | 2061 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
| 2062 | { |
| 2063 | clp->cl_clientid.cl_boot = nn->boot_time; |
| 2064 | clp->cl_clientid.cl_id = nn->clientid_counter++; |
| 2065 | gen_confirm(clp, nn); |
| 2066 | } |
| 2067 | |
Jeff Layton | 4770d72 | 2014-07-29 21:34:10 -0400 | [diff] [blame] | 2068 | static struct nfs4_stid * |
| 2069 | find_stateid_locked(struct nfs4_client *cl, stateid_t *t) |
J. Bruce Fields | 4581d14 | 2011-09-06 14:56:09 -0400 | [diff] [blame] | 2070 | { |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 2071 | struct nfs4_stid *ret; |
| 2072 | |
| 2073 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
| 2074 | if (!ret || !ret->sc_type) |
| 2075 | return NULL; |
| 2076 | return ret; |
J. Bruce Fields | 4d71ab8 | 2011-09-06 16:48:57 -0400 | [diff] [blame] | 2077 | } |
| 2078 | |
Jeff Layton | 4770d72 | 2014-07-29 21:34:10 -0400 | [diff] [blame] | 2079 | static struct nfs4_stid * |
Jeff Layton | 4770d72 | 2014-07-29 21:34:10 -0400 | [diff] [blame] | 2080 | find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) |
J. Bruce Fields | f459e45 | 2011-09-09 09:06:12 -0400 | [diff] [blame] | 2081 | { |
| 2082 | struct nfs4_stid *s; |
| 2083 | |
Jeff Layton | 4770d72 | 2014-07-29 21:34:10 -0400 | [diff] [blame] | 2084 | spin_lock(&cl->cl_lock); |
| 2085 | s = find_stateid_locked(cl, t); |
Trond Myklebust | 2d3f966 | 2014-07-29 21:34:25 -0400 | [diff] [blame] | 2086 | if (s != NULL) { |
| 2087 | if (typemask & s->sc_type) |
| 2088 | atomic_inc(&s->sc_count); |
| 2089 | else |
| 2090 | s = NULL; |
| 2091 | } |
Jeff Layton | 4770d72 | 2014-07-29 21:34:10 -0400 | [diff] [blame] | 2092 | spin_unlock(&cl->cl_lock); |
| 2093 | return s; |
J. Bruce Fields | 4581d14 | 2011-09-06 14:56:09 -0400 | [diff] [blame] | 2094 | } |
| 2095 | |
Jeff Layton | 2216d44 | 2012-11-12 15:00:57 -0500 | [diff] [blame] | 2096 | static struct nfs4_client *create_client(struct xdr_netobj name, |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 2097 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
| 2098 | { |
| 2099 | struct nfs4_client *clp; |
| 2100 | struct sockaddr *sa = svc_addr(rqstp); |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 2101 | int ret; |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 2102 | struct net *net = SVC_NET(rqstp); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 2103 | |
| 2104 | clp = alloc_client(name); |
| 2105 | if (clp == NULL) |
| 2106 | return NULL; |
| 2107 | |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 2108 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
| 2109 | if (ret) { |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 2110 | free_client(clp); |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 2111 | return NULL; |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 2112 | } |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 2113 | nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); |
Benny Halevy | 07cd490 | 2010-05-12 00:13:41 +0300 | [diff] [blame] | 2114 | clp->cl_time = get_seconds(); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 2115 | clear_bit(0, &clp->cl_cb_slot_busy); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 2116 | copy_verf(clp, verf); |
| 2117 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); |
J. Bruce Fields | edd7678 | 2010-06-14 22:26:31 -0400 | [diff] [blame] | 2118 | clp->cl_cb_session = NULL; |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 2119 | clp->net = net; |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 2120 | return clp; |
| 2121 | } |
| 2122 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2123 | static void |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 2124 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
| 2125 | { |
| 2126 | struct rb_node **new = &(root->rb_node), *parent = NULL; |
| 2127 | struct nfs4_client *clp; |
| 2128 | |
| 2129 | while (*new) { |
| 2130 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); |
| 2131 | parent = *new; |
| 2132 | |
| 2133 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) |
| 2134 | new = &((*new)->rb_left); |
| 2135 | else |
| 2136 | new = &((*new)->rb_right); |
| 2137 | } |
| 2138 | |
| 2139 | rb_link_node(&new_clp->cl_namenode, parent, new); |
| 2140 | rb_insert_color(&new_clp->cl_namenode, root); |
| 2141 | } |
| 2142 | |
| 2143 | static struct nfs4_client * |
| 2144 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) |
| 2145 | { |
Rasmus Villemoes | ef17af2 | 2014-12-05 16:40:07 +0100 | [diff] [blame] | 2146 | int cmp; |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 2147 | struct rb_node *node = root->rb_node; |
| 2148 | struct nfs4_client *clp; |
| 2149 | |
| 2150 | while (node) { |
| 2151 | clp = rb_entry(node, struct nfs4_client, cl_namenode); |
| 2152 | cmp = compare_blob(&clp->cl_name, name); |
| 2153 | if (cmp > 0) |
| 2154 | node = node->rb_left; |
| 2155 | else if (cmp < 0) |
| 2156 | node = node->rb_right; |
| 2157 | else |
| 2158 | return clp; |
| 2159 | } |
| 2160 | return NULL; |
| 2161 | } |
| 2162 | |
| 2163 | static void |
| 2164 | add_to_unconfirmed(struct nfs4_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | { |
| 2166 | unsigned int idhashval; |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 2167 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2168 | |
Trond Myklebust | 0a880a2 | 2014-07-30 08:27:10 -0400 | [diff] [blame] | 2169 | lockdep_assert_held(&nn->client_lock); |
| 2170 | |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 2171 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 2172 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 2174 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 2175 | renew_client_locked(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2176 | } |
| 2177 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2178 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | move_to_confirmed(struct nfs4_client *clp) |
| 2180 | { |
| 2181 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 2182 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | |
Trond Myklebust | 0a880a2 | 2014-07-30 08:27:10 -0400 | [diff] [blame] | 2184 | lockdep_assert_held(&nn->client_lock); |
| 2185 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2186 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 2187 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 2188 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 2189 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 2190 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 2191 | renew_client_locked(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2192 | } |
| 2193 | |
| 2194 | static struct nfs4_client * |
J. Bruce Fields | bfa85e83 | 2013-03-14 18:24:52 -0400 | [diff] [blame] | 2195 | find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | { |
| 2197 | struct nfs4_client *clp; |
| 2198 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 2199 | |
J. Bruce Fields | bfa85e83 | 2013-03-14 18:24:52 -0400 | [diff] [blame] | 2200 | list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { |
J. Bruce Fields | a50d2ad | 2011-10-12 16:24:27 -0400 | [diff] [blame] | 2201 | if (same_clid(&clp->cl_clientid, clid)) { |
J. Bruce Fields | d15c077 | 2012-09-13 16:19:31 -0400 | [diff] [blame] | 2202 | if ((bool)clp->cl_minorversion != sessions) |
| 2203 | return NULL; |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 2204 | renew_client_locked(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | return clp; |
J. Bruce Fields | a50d2ad | 2011-10-12 16:24:27 -0400 | [diff] [blame] | 2206 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2207 | } |
| 2208 | return NULL; |
| 2209 | } |
| 2210 | |
| 2211 | static struct nfs4_client * |
J. Bruce Fields | bfa85e83 | 2013-03-14 18:24:52 -0400 | [diff] [blame] | 2212 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
| 2213 | { |
| 2214 | struct list_head *tbl = nn->conf_id_hashtbl; |
| 2215 | |
Trond Myklebust | 0a880a2 | 2014-07-30 08:27:10 -0400 | [diff] [blame] | 2216 | lockdep_assert_held(&nn->client_lock); |
J. Bruce Fields | bfa85e83 | 2013-03-14 18:24:52 -0400 | [diff] [blame] | 2217 | return find_client_in_id_table(tbl, clid, sessions); |
| 2218 | } |
| 2219 | |
| 2220 | static struct nfs4_client * |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 2221 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | { |
J. Bruce Fields | bfa85e83 | 2013-03-14 18:24:52 -0400 | [diff] [blame] | 2223 | struct list_head *tbl = nn->unconf_id_hashtbl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2224 | |
Trond Myklebust | 0a880a2 | 2014-07-30 08:27:10 -0400 | [diff] [blame] | 2225 | lockdep_assert_held(&nn->client_lock); |
J. Bruce Fields | bfa85e83 | 2013-03-14 18:24:52 -0400 | [diff] [blame] | 2226 | return find_client_in_id_table(tbl, clid, sessions); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2227 | } |
| 2228 | |
J. Bruce Fields | 6e5f15c | 2010-11-24 17:17:34 -0500 | [diff] [blame] | 2229 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 2230 | { |
J. Bruce Fields | 6e5f15c | 2010-11-24 17:17:34 -0500 | [diff] [blame] | 2231 | return clp->cl_exchange_flags != 0; |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 2232 | } |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 2233 | |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 2234 | static struct nfs4_client * |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 2235 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 2236 | { |
Trond Myklebust | 0a880a2 | 2014-07-30 08:27:10 -0400 | [diff] [blame] | 2237 | lockdep_assert_held(&nn->client_lock); |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 2238 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 2239 | } |
| 2240 | |
| 2241 | static struct nfs4_client * |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 2242 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 2243 | { |
Trond Myklebust | 0a880a2 | 2014-07-30 08:27:10 -0400 | [diff] [blame] | 2244 | lockdep_assert_held(&nn->client_lock); |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 2245 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 2246 | } |
| 2247 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2248 | static void |
Takuma Umeya | 6f3d772 | 2010-12-15 14:09:01 +0900 | [diff] [blame] | 2249 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2250 | { |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 2251 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
Takuma Umeya | 6f3d772 | 2010-12-15 14:09:01 +0900 | [diff] [blame] | 2252 | struct sockaddr *sa = svc_addr(rqstp); |
| 2253 | u32 scopeid = rpc_get_scope_id(sa); |
Jeff Layton | 7077ecb | 2009-08-14 12:57:58 -0400 | [diff] [blame] | 2254 | unsigned short expected_family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2255 | |
Jeff Layton | 7077ecb | 2009-08-14 12:57:58 -0400 | [diff] [blame] | 2256 | /* Currently, we only support tcp and tcp6 for the callback channel */ |
| 2257 | if (se->se_callback_netid_len == 3 && |
| 2258 | !memcmp(se->se_callback_netid_val, "tcp", 3)) |
| 2259 | expected_family = AF_INET; |
| 2260 | else if (se->se_callback_netid_len == 4 && |
| 2261 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) |
| 2262 | expected_family = AF_INET6; |
| 2263 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2264 | goto out_err; |
| 2265 | |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 2266 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 2267 | se->se_callback_addr_len, |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 2268 | (struct sockaddr *)&conn->cb_addr, |
| 2269 | sizeof(conn->cb_addr)); |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 2270 | |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 2271 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | goto out_err; |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 2273 | |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 2274 | if (conn->cb_addr.ss_family == AF_INET6) |
| 2275 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; |
Jeff Layton | fbf4665 | 2009-08-14 12:57:59 -0400 | [diff] [blame] | 2276 | |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 2277 | conn->cb_prog = se->se_callback_prog; |
| 2278 | conn->cb_ident = se->se_callback_ident; |
Mi Jinlong | 849a1cf | 2011-08-30 17:18:41 +0800 | [diff] [blame] | 2279 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2280 | return; |
| 2281 | out_err: |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 2282 | conn->cb_addr.ss_family = AF_UNSPEC; |
| 2283 | conn->cb_addrlen = 0; |
Rasmus Villemoes | 4ab495b | 2017-02-24 01:15:55 +0100 | [diff] [blame] | 2284 | dprintk("NFSD: this client (clientid %08x/%08x) " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | "will not receive delegations\n", |
| 2286 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 2287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2288 | return; |
| 2289 | } |
| 2290 | |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2291 | /* |
J. Bruce Fields | 067e1ac | 2014-03-21 17:26:44 -0400 | [diff] [blame] | 2292 | * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2293 | */ |
Trond Myklebust | b607664 | 2014-06-30 11:48:35 -0400 | [diff] [blame] | 2294 | static void |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2295 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
| 2296 | { |
J. Bruce Fields | f523601 | 2014-03-21 17:57:57 -0400 | [diff] [blame] | 2297 | struct xdr_buf *buf = resp->xdr.buf; |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 2298 | struct nfsd4_slot *slot = resp->cstate.slot; |
| 2299 | unsigned int base; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2300 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 2301 | dprintk("--> %s slot %p\n", __func__, slot); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2302 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 2303 | slot->sl_opcnt = resp->opcnt; |
| 2304 | slot->sl_status = resp->cstate.status; |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 2305 | |
J. Bruce Fields | bf5c43c | 2012-02-13 16:56:19 -0500 | [diff] [blame] | 2306 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 2307 | if (nfsd4_not_cached(resp)) { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 2308 | slot->sl_datalen = 0; |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 2309 | return; |
| 2310 | } |
J. Bruce Fields | f523601 | 2014-03-21 17:57:57 -0400 | [diff] [blame] | 2311 | base = resp->cstate.data_offset; |
| 2312 | slot->sl_datalen = buf->len - base; |
| 2313 | if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) |
Dan Carpenter | d3f0340 | 2015-11-21 13:28:50 +0300 | [diff] [blame] | 2314 | WARN(1, "%s: sessions DRC could not cache compound\n", |
| 2315 | __func__); |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 2316 | return; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2317 | } |
| 2318 | |
| 2319 | /* |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 2320 | * Encode the replay sequence operation from the slot values. |
| 2321 | * If cachethis is FALSE encode the uncached rep error on the next |
| 2322 | * operation which sets resp->p and increments resp->opcnt for |
| 2323 | * nfs4svc_encode_compoundres. |
| 2324 | * |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2325 | */ |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 2326 | static __be32 |
| 2327 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, |
| 2328 | struct nfsd4_compoundres *resp) |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2329 | { |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 2330 | struct nfsd4_op *op; |
| 2331 | struct nfsd4_slot *slot = resp->cstate.slot; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2332 | |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 2333 | /* Encode the replayed sequence operation */ |
| 2334 | op = &args->ops[resp->opcnt - 1]; |
| 2335 | nfsd4_encode_operation(resp, op); |
| 2336 | |
| 2337 | /* Return nfserr_retry_uncached_rep in next operation. */ |
J. Bruce Fields | 73e7948 | 2012-02-13 16:39:00 -0500 | [diff] [blame] | 2338 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 2339 | op = &args->ops[resp->opcnt++]; |
| 2340 | op->status = nfserr_retry_uncached_rep; |
| 2341 | nfsd4_encode_operation(resp, op); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2342 | } |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 2343 | return op->status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2344 | } |
| 2345 | |
| 2346 | /* |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 2347 | * The sequence operation is not cached because we can use the slot and |
| 2348 | * session values. |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2349 | */ |
J. Bruce Fields | 3ca2eb9 | 2014-03-21 12:04:21 -0400 | [diff] [blame] | 2350 | static __be32 |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 2351 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
| 2352 | struct nfsd4_sequence *seq) |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2353 | { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 2354 | struct nfsd4_slot *slot = resp->cstate.slot; |
J. Bruce Fields | f523601 | 2014-03-21 17:57:57 -0400 | [diff] [blame] | 2355 | struct xdr_stream *xdr = &resp->xdr; |
| 2356 | __be32 *p; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2357 | __be32 status; |
| 2358 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 2359 | dprintk("--> %s slot %p\n", __func__, slot); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2360 | |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 2361 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
J. Bruce Fields | 0da7b19 | 2014-03-21 11:43:34 -0400 | [diff] [blame] | 2362 | if (status) |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 2363 | return status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2364 | |
J. Bruce Fields | f523601 | 2014-03-21 17:57:57 -0400 | [diff] [blame] | 2365 | p = xdr_reserve_space(xdr, slot->sl_datalen); |
| 2366 | if (!p) { |
| 2367 | WARN_ON_ONCE(1); |
| 2368 | return nfserr_serverfault; |
| 2369 | } |
| 2370 | xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); |
| 2371 | xdr_commit_encode(xdr); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2372 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 2373 | resp->opcnt = slot->sl_opcnt; |
J. Bruce Fields | f523601 | 2014-03-21 17:57:57 -0400 | [diff] [blame] | 2374 | return slot->sl_status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 2375 | } |
| 2376 | |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2377 | /* |
| 2378 | * Set the exchange_id flags returned by the server. |
| 2379 | */ |
| 2380 | static void |
| 2381 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) |
| 2382 | { |
Christoph Hellwig | 9cf514c | 2014-05-05 13:11:59 +0200 | [diff] [blame] | 2383 | #ifdef CONFIG_NFSD_PNFS |
| 2384 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; |
| 2385 | #else |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2386 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
Christoph Hellwig | 9cf514c | 2014-05-05 13:11:59 +0200 | [diff] [blame] | 2387 | #endif |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2388 | |
| 2389 | /* Referrals are supported, Migration is not. */ |
| 2390 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; |
| 2391 | |
| 2392 | /* set the wire flags to return to client. */ |
| 2393 | clid->flags = new->cl_exchange_flags; |
| 2394 | } |
| 2395 | |
J. Bruce Fields | 4eaea13 | 2015-10-15 16:11:01 -0400 | [diff] [blame] | 2396 | static bool client_has_openowners(struct nfs4_client *clp) |
| 2397 | { |
| 2398 | struct nfs4_openowner *oo; |
| 2399 | |
| 2400 | list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { |
| 2401 | if (!list_empty(&oo->oo_owner.so_stateids)) |
| 2402 | return true; |
| 2403 | } |
| 2404 | return false; |
| 2405 | } |
| 2406 | |
J. Bruce Fields | 631fc9e | 2012-05-14 15:57:23 -0400 | [diff] [blame] | 2407 | static bool client_has_state(struct nfs4_client *clp) |
| 2408 | { |
J. Bruce Fields | 4eaea13 | 2015-10-15 16:11:01 -0400 | [diff] [blame] | 2409 | return client_has_openowners(clp) |
Kinglong Mee | 47e970b | 2015-07-21 13:09:17 +0800 | [diff] [blame] | 2410 | #ifdef CONFIG_NFSD_PNFS |
| 2411 | || !list_empty(&clp->cl_lo_states) |
| 2412 | #endif |
J. Bruce Fields | 6eccece | 2012-05-29 16:37:44 -0400 | [diff] [blame] | 2413 | || !list_empty(&clp->cl_delegations) |
| 2414 | || !list_empty(&clp->cl_sessions); |
J. Bruce Fields | 631fc9e | 2012-05-14 15:57:23 -0400 | [diff] [blame] | 2415 | } |
| 2416 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2417 | __be32 |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2418 | nfsd4_exchange_id(struct svc_rqst *rqstp, |
| 2419 | struct nfsd4_compound_state *cstate, |
| 2420 | struct nfsd4_exchange_id *exid) |
| 2421 | { |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 2422 | struct nfs4_client *conf, *new; |
| 2423 | struct nfs4_client *unconf = NULL; |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 2424 | __be32 status; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 2425 | char addr_str[INET6_ADDRSTRLEN]; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2426 | nfs4_verifier verf = exid->verifier; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 2427 | struct sockaddr *sa = svc_addr(rqstp); |
J. Bruce Fields | 83e08fd | 2012-05-14 09:08:10 -0400 | [diff] [blame] | 2428 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 2429 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2430 | |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 2431 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2432 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 2433 | "ip_addr=%s flags %x, spa_how %d\n", |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2434 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 2435 | addr_str, exid->flags, exid->spa_how); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2436 | |
J. Bruce Fields | a084daf | 2011-10-10 15:07:40 -0400 | [diff] [blame] | 2437 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2438 | return nfserr_inval; |
| 2439 | |
J. Bruce Fields | 50c7b94 | 2015-11-23 15:39:12 -0700 | [diff] [blame] | 2440 | new = create_client(exid->clname, rqstp, &verf); |
| 2441 | if (new == NULL) |
| 2442 | return nfserr_jukebox; |
| 2443 | |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2444 | switch (exid->spa_how) { |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2445 | case SP4_MACH_CRED: |
Andrew Elble | ed94164 | 2016-06-15 12:52:09 -0400 | [diff] [blame] | 2446 | exid->spo_must_enforce[0] = 0; |
| 2447 | exid->spo_must_enforce[1] = ( |
| 2448 | 1 << (OP_BIND_CONN_TO_SESSION - 32) | |
| 2449 | 1 << (OP_EXCHANGE_ID - 32) | |
| 2450 | 1 << (OP_CREATE_SESSION - 32) | |
| 2451 | 1 << (OP_DESTROY_SESSION - 32) | |
| 2452 | 1 << (OP_DESTROY_CLIENTID - 32)); |
| 2453 | |
| 2454 | exid->spo_must_allow[0] &= (1 << (OP_CLOSE) | |
| 2455 | 1 << (OP_OPEN_DOWNGRADE) | |
| 2456 | 1 << (OP_LOCKU) | |
| 2457 | 1 << (OP_DELEGRETURN)); |
| 2458 | |
| 2459 | exid->spo_must_allow[1] &= ( |
| 2460 | 1 << (OP_TEST_STATEID - 32) | |
| 2461 | 1 << (OP_FREE_STATEID - 32)); |
J. Bruce Fields | 50c7b94 | 2015-11-23 15:39:12 -0700 | [diff] [blame] | 2462 | if (!svc_rqst_integrity_protected(rqstp)) { |
| 2463 | status = nfserr_inval; |
| 2464 | goto out_nolock; |
| 2465 | } |
J. Bruce Fields | 920dd9b | 2015-11-20 16:42:40 -0500 | [diff] [blame] | 2466 | /* |
| 2467 | * Sometimes userspace doesn't give us a principal. |
| 2468 | * Which is a bug, really. Anyway, we can't enforce |
| 2469 | * MACH_CRED in that case, better to give up now: |
| 2470 | */ |
J. Bruce Fields | 414ca01 | 2015-11-20 10:48:02 -0500 | [diff] [blame] | 2471 | if (!new->cl_cred.cr_principal && |
| 2472 | !new->cl_cred.cr_raw_principal) { |
J. Bruce Fields | 920dd9b | 2015-11-20 16:42:40 -0500 | [diff] [blame] | 2473 | status = nfserr_serverfault; |
| 2474 | goto out_nolock; |
| 2475 | } |
J. Bruce Fields | 50c7b94 | 2015-11-23 15:39:12 -0700 | [diff] [blame] | 2476 | new->cl_mach_cred = true; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2477 | case SP4_NONE: |
| 2478 | break; |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 2479 | default: /* checked by xdr code */ |
| 2480 | WARN_ON_ONCE(1); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2481 | case SP4_SSV: |
Kinglong Mee | 8edf4b0 | 2016-02-26 22:36:42 +0800 | [diff] [blame] | 2482 | status = nfserr_encr_alg_unsupp; |
| 2483 | goto out_nolock; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2484 | } |
| 2485 | |
J. Bruce Fields | 2dbb269 | 2012-05-14 09:47:11 -0400 | [diff] [blame] | 2486 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 2487 | spin_lock(&nn->client_lock); |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 2488 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2489 | if (conf) { |
J. Bruce Fields | 83e08fd | 2012-05-14 09:08:10 -0400 | [diff] [blame] | 2490 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
| 2491 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); |
| 2492 | |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 2493 | if (update) { |
| 2494 | if (!clp_used_exchangeid(conf)) { /* buggy client */ |
J. Bruce Fields | 2dbb269 | 2012-05-14 09:47:11 -0400 | [diff] [blame] | 2495 | status = nfserr_inval; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2496 | goto out; |
| 2497 | } |
Andrew Elble | dedeb13 | 2016-06-15 12:52:08 -0400 | [diff] [blame] | 2498 | if (!nfsd4_mach_creds_match(conf, rqstp)) { |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2499 | status = nfserr_wrong_cred; |
| 2500 | goto out; |
| 2501 | } |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 2502 | if (!creds_match) { /* case 9 */ |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2503 | status = nfserr_perm; |
| 2504 | goto out; |
| 2505 | } |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 2506 | if (!verfs_match) { /* case 8 */ |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2507 | status = nfserr_not_same; |
| 2508 | goto out; |
| 2509 | } |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 2510 | /* case 6 */ |
| 2511 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 2512 | goto out_copy; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2513 | } |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 2514 | if (!creds_match) { /* case 3 */ |
J. Bruce Fields | 631fc9e | 2012-05-14 15:57:23 -0400 | [diff] [blame] | 2515 | if (client_has_state(conf)) { |
| 2516 | status = nfserr_clid_inuse; |
| 2517 | goto out; |
| 2518 | } |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2519 | goto out_new; |
| 2520 | } |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 2521 | if (verfs_match) { /* case 2 */ |
J. Bruce Fields | 0f1ba0e | 2012-05-25 21:24:40 -0400 | [diff] [blame] | 2522 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 2523 | goto out_copy; |
| 2524 | } |
| 2525 | /* case 5, client reboot */ |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 2526 | conf = NULL; |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 2527 | goto out_new; |
Mike Sager | 6ddbbbf | 2009-06-16 04:20:47 +0300 | [diff] [blame] | 2528 | } |
| 2529 | |
J. Bruce Fields | 2dbb269 | 2012-05-14 09:47:11 -0400 | [diff] [blame] | 2530 | if (update) { /* case 7 */ |
Mike Sager | 6ddbbbf | 2009-06-16 04:20:47 +0300 | [diff] [blame] | 2531 | status = nfserr_noent; |
| 2532 | goto out; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2533 | } |
| 2534 | |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 2535 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
J. Bruce Fields | 2dbb269 | 2012-05-14 09:47:11 -0400 | [diff] [blame] | 2536 | if (unconf) /* case 4, possible retry or client restart */ |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 2537 | unhash_client_locked(unconf); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2538 | |
J. Bruce Fields | 2dbb269 | 2012-05-14 09:47:11 -0400 | [diff] [blame] | 2539 | /* case 1 (normal case) */ |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2540 | out_new: |
Jeff Layton | fd699b8 | 2014-07-30 08:27:14 -0400 | [diff] [blame] | 2541 | if (conf) { |
| 2542 | status = mark_client_expired_locked(conf); |
| 2543 | if (status) |
| 2544 | goto out; |
| 2545 | } |
J. Bruce Fields | 4f540e2 | 2013-05-07 11:57:52 -0400 | [diff] [blame] | 2546 | new->cl_minorversion = cstate->minorversion; |
Andrew Elble | ed94164 | 2016-06-15 12:52:09 -0400 | [diff] [blame] | 2547 | new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0]; |
| 2548 | new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1]; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2549 | |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 2550 | gen_clid(new, nn); |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 2551 | add_to_unconfirmed(new); |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 2552 | swap(new, conf); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2553 | out_copy: |
Trond Myklebust | 5cc40fd | 2014-07-30 08:27:05 -0400 | [diff] [blame] | 2554 | exid->clientid.cl_boot = conf->cl_clientid.cl_boot; |
| 2555 | exid->clientid.cl_id = conf->cl_clientid.cl_id; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2556 | |
Trond Myklebust | 5cc40fd | 2014-07-30 08:27:05 -0400 | [diff] [blame] | 2557 | exid->seqid = conf->cl_cs_slot.sl_seqid + 1; |
| 2558 | nfsd4_set_ex_flags(conf, exid); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2559 | |
| 2560 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", |
Trond Myklebust | 5cc40fd | 2014-07-30 08:27:05 -0400 | [diff] [blame] | 2561 | conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2562 | status = nfs_ok; |
| 2563 | |
| 2564 | out: |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 2565 | spin_unlock(&nn->client_lock); |
J. Bruce Fields | 50c7b94 | 2015-11-23 15:39:12 -0700 | [diff] [blame] | 2566 | out_nolock: |
Trond Myklebust | 5cc40fd | 2014-07-30 08:27:05 -0400 | [diff] [blame] | 2567 | if (new) |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 2568 | expire_client(new); |
| 2569 | if (unconf) |
| 2570 | expire_client(unconf); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 2571 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2572 | } |
| 2573 | |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 2574 | static __be32 |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 2575 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2576 | { |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 2577 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
| 2578 | slot_seqid); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2579 | |
| 2580 | /* The slot is in use, and no response has been sent. */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 2581 | if (slot_inuse) { |
| 2582 | if (seqid == slot_seqid) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2583 | return nfserr_jukebox; |
| 2584 | else |
| 2585 | return nfserr_seq_misordered; |
| 2586 | } |
J. Bruce Fields | f6d8248 | 2012-02-13 16:13:41 -0500 | [diff] [blame] | 2587 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 2588 | if (likely(seqid == slot_seqid + 1)) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2589 | return nfs_ok; |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 2590 | if (seqid == slot_seqid) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2591 | return nfserr_replay_cache; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2592 | return nfserr_seq_misordered; |
| 2593 | } |
| 2594 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 2595 | /* |
| 2596 | * Cache the create session result into the create session single DRC |
| 2597 | * slot cache by saving the xdr structure. sl_seqid has been set. |
| 2598 | * Do this for solo or embedded create session operations. |
| 2599 | */ |
| 2600 | static void |
| 2601 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 2602 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 2603 | { |
| 2604 | slot->sl_status = nfserr; |
| 2605 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); |
| 2606 | } |
| 2607 | |
| 2608 | static __be32 |
| 2609 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, |
| 2610 | struct nfsd4_clid_slot *slot) |
| 2611 | { |
| 2612 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); |
| 2613 | return slot->sl_status; |
| 2614 | } |
| 2615 | |
Mi Jinlong | 1b74c25 | 2011-07-14 14:50:17 +0800 | [diff] [blame] | 2616 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
| 2617 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ |
| 2618 | 1 + /* MIN tag is length with zero, only length */ \ |
| 2619 | 3 + /* version, opcount, opcode */ \ |
| 2620 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ |
| 2621 | /* seqid, slotID, slotID, cache */ \ |
| 2622 | 4 ) * sizeof(__be32)) |
| 2623 | |
| 2624 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ |
| 2625 | 2 + /* verifier: AUTH_NULL, length 0 */\ |
| 2626 | 1 + /* status */ \ |
| 2627 | 1 + /* MIN tag is length with zero, only length */ \ |
| 2628 | 3 + /* opcount, opcode, opstatus*/ \ |
| 2629 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ |
| 2630 | /* seqid, slotID, slotID, slotID, status */ \ |
| 2631 | 5 ) * sizeof(__be32)) |
| 2632 | |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 2633 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) |
Mi Jinlong | 1b74c25 | 2011-07-14 14:50:17 +0800 | [diff] [blame] | 2634 | { |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 2635 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
| 2636 | |
J. Bruce Fields | 373cd40 | 2013-04-08 15:42:12 -0400 | [diff] [blame] | 2637 | if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) |
| 2638 | return nfserr_toosmall; |
| 2639 | if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) |
| 2640 | return nfserr_toosmall; |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 2641 | ca->headerpadsz = 0; |
| 2642 | ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); |
| 2643 | ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); |
| 2644 | ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); |
| 2645 | ca->maxresp_cached = min_t(u32, ca->maxresp_cached, |
| 2646 | NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); |
| 2647 | ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); |
| 2648 | /* |
| 2649 | * Note decreasing slot size below client's request may make it |
| 2650 | * difficult for client to function correctly, whereas |
| 2651 | * decreasing the number of slots will (just?) affect |
| 2652 | * performance. When short on memory we therefore prefer to |
| 2653 | * decrease number of slots instead of their size. Clients that |
| 2654 | * request larger slots than they need will get poor results: |
| 2655 | */ |
| 2656 | ca->maxreqs = nfsd4_get_drc_mem(ca); |
| 2657 | if (!ca->maxreqs) |
| 2658 | return nfserr_jukebox; |
| 2659 | |
J. Bruce Fields | 373cd40 | 2013-04-08 15:42:12 -0400 | [diff] [blame] | 2660 | return nfs_ok; |
Mi Jinlong | 1b74c25 | 2011-07-14 14:50:17 +0800 | [diff] [blame] | 2661 | } |
| 2662 | |
Chuck Lever | 4500632 | 2016-03-01 13:06:02 -0500 | [diff] [blame] | 2663 | /* |
| 2664 | * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now. |
| 2665 | * These are based on similar macros in linux/sunrpc/msg_prot.h . |
| 2666 | */ |
| 2667 | #define RPC_MAX_HEADER_WITH_AUTH_SYS \ |
| 2668 | (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK)) |
| 2669 | |
| 2670 | #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \ |
| 2671 | (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK)) |
| 2672 | |
Kinglong Mee | 8a89163 | 2013-12-23 18:11:02 +0800 | [diff] [blame] | 2673 | #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ |
Chuck Lever | 4500632 | 2016-03-01 13:06:02 -0500 | [diff] [blame] | 2674 | RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32)) |
Kinglong Mee | 8a89163 | 2013-12-23 18:11:02 +0800 | [diff] [blame] | 2675 | #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ |
Chuck Lever | 4500632 | 2016-03-01 13:06:02 -0500 | [diff] [blame] | 2676 | RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \ |
| 2677 | sizeof(__be32)) |
Kinglong Mee | 8a89163 | 2013-12-23 18:11:02 +0800 | [diff] [blame] | 2678 | |
J. Bruce Fields | 06b332a | 2013-04-09 11:34:36 -0400 | [diff] [blame] | 2679 | static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) |
| 2680 | { |
| 2681 | ca->headerpadsz = 0; |
| 2682 | |
Kinglong Mee | 8a89163 | 2013-12-23 18:11:02 +0800 | [diff] [blame] | 2683 | if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) |
J. Bruce Fields | 06b332a | 2013-04-09 11:34:36 -0400 | [diff] [blame] | 2684 | return nfserr_toosmall; |
Kinglong Mee | 8a89163 | 2013-12-23 18:11:02 +0800 | [diff] [blame] | 2685 | if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) |
J. Bruce Fields | 06b332a | 2013-04-09 11:34:36 -0400 | [diff] [blame] | 2686 | return nfserr_toosmall; |
| 2687 | ca->maxresp_cached = 0; |
| 2688 | if (ca->maxops < 2) |
| 2689 | return nfserr_toosmall; |
| 2690 | |
| 2691 | return nfs_ok; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2692 | } |
| 2693 | |
J. Bruce Fields | b78724b | 2013-05-15 17:34:39 -0400 | [diff] [blame] | 2694 | static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) |
| 2695 | { |
| 2696 | switch (cbs->flavor) { |
| 2697 | case RPC_AUTH_NULL: |
| 2698 | case RPC_AUTH_UNIX: |
| 2699 | return nfs_ok; |
| 2700 | default: |
| 2701 | /* |
| 2702 | * GSS case: the spec doesn't allow us to return this |
| 2703 | * error. But it also doesn't allow us not to support |
| 2704 | * GSS. |
| 2705 | * I'd rather this fail hard than return some error the |
| 2706 | * client might think it can already handle: |
| 2707 | */ |
| 2708 | return nfserr_encr_alg_unsupp; |
| 2709 | } |
| 2710 | } |
| 2711 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2712 | __be32 |
| 2713 | nfsd4_create_session(struct svc_rqst *rqstp, |
| 2714 | struct nfsd4_compound_state *cstate, |
| 2715 | struct nfsd4_create_session *cr_ses) |
| 2716 | { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 2717 | struct sockaddr *sa = svc_addr(rqstp); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2718 | struct nfs4_client *conf, *unconf; |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 2719 | struct nfs4_client *old = NULL; |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 2720 | struct nfsd4_session *new; |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 2721 | struct nfsd4_conn *conn; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 2722 | struct nfsd4_clid_slot *cs_slot = NULL; |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 2723 | __be32 status = 0; |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 2724 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2725 | |
Mi Jinlong | a62573d | 2011-03-23 17:57:07 +0800 | [diff] [blame] | 2726 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
| 2727 | return nfserr_inval; |
J. Bruce Fields | b78724b | 2013-05-15 17:34:39 -0400 | [diff] [blame] | 2728 | status = nfsd4_check_cb_sec(&cr_ses->cb_sec); |
| 2729 | if (status) |
| 2730 | return status; |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 2731 | status = check_forechannel_attrs(&cr_ses->fore_channel, nn); |
J. Bruce Fields | 373cd40 | 2013-04-08 15:42:12 -0400 | [diff] [blame] | 2732 | if (status) |
| 2733 | return status; |
J. Bruce Fields | 06b332a | 2013-04-09 11:34:36 -0400 | [diff] [blame] | 2734 | status = check_backchannel_attrs(&cr_ses->back_channel); |
| 2735 | if (status) |
Kinglong Mee | f403e45 | 2013-12-23 17:31:21 +0800 | [diff] [blame] | 2736 | goto out_release_drc_mem; |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 2737 | status = nfserr_jukebox; |
Kinglong Mee | 60810e5 | 2014-01-01 00:35:47 +0800 | [diff] [blame] | 2738 | new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 2739 | if (!new) |
| 2740 | goto out_release_drc_mem; |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 2741 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
| 2742 | if (!conn) |
| 2743 | goto out_free_session; |
Mi Jinlong | a62573d | 2011-03-23 17:57:07 +0800 | [diff] [blame] | 2744 | |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 2745 | spin_lock(&nn->client_lock); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 2746 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 2747 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
J. Bruce Fields | 7838904 | 2013-03-12 10:12:37 -0400 | [diff] [blame] | 2748 | WARN_ON_ONCE(conf && unconf); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2749 | |
| 2750 | if (conf) { |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2751 | status = nfserr_wrong_cred; |
Andrew Elble | dedeb13 | 2016-06-15 12:52:08 -0400 | [diff] [blame] | 2752 | if (!nfsd4_mach_creds_match(conf, rqstp)) |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2753 | goto out_free_conn; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 2754 | cs_slot = &conf->cl_cs_slot; |
| 2755 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); |
Kinglong Mee | f5e22bb | 2015-07-13 17:32:34 +0800 | [diff] [blame] | 2756 | if (status) { |
| 2757 | if (status == nfserr_replay_cache) |
| 2758 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 2759 | goto out_free_conn; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2760 | } |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2761 | } else if (unconf) { |
| 2762 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 2763 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2764 | status = nfserr_clid_inuse; |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 2765 | goto out_free_conn; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2766 | } |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2767 | status = nfserr_wrong_cred; |
Andrew Elble | dedeb13 | 2016-06-15 12:52:08 -0400 | [diff] [blame] | 2768 | if (!nfsd4_mach_creds_match(unconf, rqstp)) |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2769 | goto out_free_conn; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 2770 | cs_slot = &unconf->cl_cs_slot; |
| 2771 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 2772 | if (status) { |
| 2773 | /* an unconfirmed replay returns misordered */ |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2774 | status = nfserr_seq_misordered; |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 2775 | goto out_free_conn; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2776 | } |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 2777 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 2778 | if (old) { |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 2779 | status = mark_client_expired_locked(old); |
Jeff Layton | 7abea1e | 2014-07-30 08:27:13 -0400 | [diff] [blame] | 2780 | if (status) { |
| 2781 | old = NULL; |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 2782 | goto out_free_conn; |
Jeff Layton | 7abea1e | 2014-07-30 08:27:13 -0400 | [diff] [blame] | 2783 | } |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 2784 | } |
J. Bruce Fields | 8f9d3d3 | 2012-09-12 14:41:31 -0400 | [diff] [blame] | 2785 | move_to_confirmed(unconf); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2786 | conf = unconf; |
| 2787 | } else { |
| 2788 | status = nfserr_stale_clientid; |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 2789 | goto out_free_conn; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2790 | } |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 2791 | status = nfs_ok; |
Chuck Lever | 4ce85c8 | 2016-03-01 13:05:27 -0500 | [diff] [blame] | 2792 | /* Persistent sessions are not supported */ |
J. Bruce Fields | 408b79b | 2010-04-15 15:11:09 -0400 | [diff] [blame] | 2793 | cr_ses->flags &= ~SESSION4_PERSIST; |
Chuck Lever | 4ce85c8 | 2016-03-01 13:05:27 -0500 | [diff] [blame] | 2794 | /* Upshifting from TCP to RDMA is not supported */ |
J. Bruce Fields | 408b79b | 2010-04-15 15:11:09 -0400 | [diff] [blame] | 2795 | cr_ses->flags &= ~SESSION4_RDMA; |
| 2796 | |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 2797 | init_session(rqstp, new, conf, cr_ses); |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 2798 | nfsd4_get_session_locked(new); |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 2799 | |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 2800 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2801 | NFS4_MAX_SESSIONID_LEN); |
J. Bruce Fields | 86c3e16 | 2010-10-02 17:04:00 -0400 | [diff] [blame] | 2802 | cs_slot->sl_seqid++; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 2803 | cr_ses->seqid = cs_slot->sl_seqid; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2804 | |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 2805 | /* cache solo and embedded create sessions under the client_lock */ |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 2806 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 2807 | spin_unlock(&nn->client_lock); |
| 2808 | /* init connection and backchannel */ |
| 2809 | nfsd4_init_conn(rqstp, conn, new); |
| 2810 | nfsd4_put_session(new); |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 2811 | if (old) |
| 2812 | expire_client(old); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 2813 | return status; |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 2814 | out_free_conn: |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 2815 | spin_unlock(&nn->client_lock); |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 2816 | free_conn(conn); |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 2817 | if (old) |
| 2818 | expire_client(old); |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 2819 | out_free_session: |
| 2820 | __free_session(new); |
J. Bruce Fields | 55c760c | 2013-04-08 16:44:14 -0400 | [diff] [blame] | 2821 | out_release_drc_mem: |
| 2822 | nfsd4_put_drc_mem(&cr_ses->fore_channel); |
J. Bruce Fields | 1ca5079 | 2013-03-14 18:12:03 -0400 | [diff] [blame] | 2823 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2824 | } |
| 2825 | |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 2826 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
| 2827 | { |
| 2828 | switch (*dir) { |
| 2829 | case NFS4_CDFC4_FORE: |
| 2830 | case NFS4_CDFC4_BACK: |
| 2831 | return nfs_ok; |
| 2832 | case NFS4_CDFC4_FORE_OR_BOTH: |
| 2833 | case NFS4_CDFC4_BACK_OR_BOTH: |
| 2834 | *dir = NFS4_CDFC4_BOTH; |
| 2835 | return nfs_ok; |
| 2836 | }; |
| 2837 | return nfserr_inval; |
| 2838 | } |
| 2839 | |
J. Bruce Fields | cb73a9f | 2012-11-01 18:09:48 -0400 | [diff] [blame] | 2840 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
| 2841 | { |
| 2842 | struct nfsd4_session *session = cstate->session; |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 2843 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
J. Bruce Fields | b78724b | 2013-05-15 17:34:39 -0400 | [diff] [blame] | 2844 | __be32 status; |
J. Bruce Fields | cb73a9f | 2012-11-01 18:09:48 -0400 | [diff] [blame] | 2845 | |
J. Bruce Fields | b78724b | 2013-05-15 17:34:39 -0400 | [diff] [blame] | 2846 | status = nfsd4_check_cb_sec(&bc->bc_cb_sec); |
| 2847 | if (status) |
| 2848 | return status; |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 2849 | spin_lock(&nn->client_lock); |
J. Bruce Fields | cb73a9f | 2012-11-01 18:09:48 -0400 | [diff] [blame] | 2850 | session->se_cb_prog = bc->bc_cb_program; |
| 2851 | session->se_cb_sec = bc->bc_cb_sec; |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 2852 | spin_unlock(&nn->client_lock); |
J. Bruce Fields | cb73a9f | 2012-11-01 18:09:48 -0400 | [diff] [blame] | 2853 | |
| 2854 | nfsd4_probe_callback(session->se_client); |
| 2855 | |
| 2856 | return nfs_ok; |
| 2857 | } |
| 2858 | |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 2859 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
| 2860 | struct nfsd4_compound_state *cstate, |
| 2861 | struct nfsd4_bind_conn_to_session *bcts) |
| 2862 | { |
| 2863 | __be32 status; |
J. Bruce Fields | 3ba6367 | 2012-09-11 15:37:40 -0400 | [diff] [blame] | 2864 | struct nfsd4_conn *conn; |
J. Bruce Fields | 4f6e6c1 | 2013-03-18 17:31:30 -0400 | [diff] [blame] | 2865 | struct nfsd4_session *session; |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 2866 | struct net *net = SVC_NET(rqstp); |
| 2867 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 2868 | |
| 2869 | if (!nfsd4_last_compound_op(rqstp)) |
| 2870 | return nfserr_not_only_op; |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 2871 | spin_lock(&nn->client_lock); |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 2872 | session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 2873 | spin_unlock(&nn->client_lock); |
J. Bruce Fields | 4f6e6c1 | 2013-03-18 17:31:30 -0400 | [diff] [blame] | 2874 | if (!session) |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 2875 | goto out_no_session; |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2876 | status = nfserr_wrong_cred; |
Andrew Elble | dedeb13 | 2016-06-15 12:52:08 -0400 | [diff] [blame] | 2877 | if (!nfsd4_mach_creds_match(session->se_client, rqstp)) |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2878 | goto out; |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 2879 | status = nfsd4_map_bcts_dir(&bcts->dir); |
J. Bruce Fields | 3ba6367 | 2012-09-11 15:37:40 -0400 | [diff] [blame] | 2880 | if (status) |
J. Bruce Fields | 4f6e6c1 | 2013-03-18 17:31:30 -0400 | [diff] [blame] | 2881 | goto out; |
J. Bruce Fields | 3ba6367 | 2012-09-11 15:37:40 -0400 | [diff] [blame] | 2882 | conn = alloc_conn(rqstp, bcts->dir); |
J. Bruce Fields | 4f6e6c1 | 2013-03-18 17:31:30 -0400 | [diff] [blame] | 2883 | status = nfserr_jukebox; |
J. Bruce Fields | 3ba6367 | 2012-09-11 15:37:40 -0400 | [diff] [blame] | 2884 | if (!conn) |
J. Bruce Fields | 4f6e6c1 | 2013-03-18 17:31:30 -0400 | [diff] [blame] | 2885 | goto out; |
| 2886 | nfsd4_init_conn(rqstp, conn, session); |
| 2887 | status = nfs_ok; |
| 2888 | out: |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 2889 | nfsd4_put_session(session); |
| 2890 | out_no_session: |
J. Bruce Fields | 4f6e6c1 | 2013-03-18 17:31:30 -0400 | [diff] [blame] | 2891 | return status; |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 2892 | } |
| 2893 | |
J. Bruce Fields | 5d4cec2 | 2010-05-01 12:56:06 -0400 | [diff] [blame] | 2894 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
| 2895 | { |
| 2896 | if (!session) |
| 2897 | return 0; |
| 2898 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); |
| 2899 | } |
| 2900 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2901 | __be32 |
| 2902 | nfsd4_destroy_session(struct svc_rqst *r, |
| 2903 | struct nfsd4_compound_state *cstate, |
| 2904 | struct nfsd4_destroy_session *sessionid) |
| 2905 | { |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 2906 | struct nfsd4_session *ses; |
J. Bruce Fields | abcdff09 | 2013-03-14 19:55:33 -0400 | [diff] [blame] | 2907 | __be32 status; |
J. Bruce Fields | f0f51f5 | 2013-06-18 14:26:02 -0400 | [diff] [blame] | 2908 | int ref_held_by_me = 0; |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 2909 | struct net *net = SVC_NET(r); |
| 2910 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 2911 | |
J. Bruce Fields | abcdff09 | 2013-03-14 19:55:33 -0400 | [diff] [blame] | 2912 | status = nfserr_not_only_op; |
J. Bruce Fields | 5d4cec2 | 2010-05-01 12:56:06 -0400 | [diff] [blame] | 2913 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
J. Bruce Fields | 5771635 | 2010-04-21 12:27:19 -0400 | [diff] [blame] | 2914 | if (!nfsd4_last_compound_op(r)) |
J. Bruce Fields | abcdff09 | 2013-03-14 19:55:33 -0400 | [diff] [blame] | 2915 | goto out; |
J. Bruce Fields | f0f51f5 | 2013-06-18 14:26:02 -0400 | [diff] [blame] | 2916 | ref_held_by_me++; |
J. Bruce Fields | 5771635 | 2010-04-21 12:27:19 -0400 | [diff] [blame] | 2917 | } |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 2918 | dump_sessionid(__func__, &sessionid->sessionid); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 2919 | spin_lock(&nn->client_lock); |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 2920 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); |
J. Bruce Fields | abcdff09 | 2013-03-14 19:55:33 -0400 | [diff] [blame] | 2921 | if (!ses) |
| 2922 | goto out_client_lock; |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2923 | status = nfserr_wrong_cred; |
Andrew Elble | dedeb13 | 2016-06-15 12:52:08 -0400 | [diff] [blame] | 2924 | if (!nfsd4_mach_creds_match(ses->se_client, r)) |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 2925 | goto out_put_session; |
J. Bruce Fields | f0f51f5 | 2013-06-18 14:26:02 -0400 | [diff] [blame] | 2926 | status = mark_session_dead_locked(ses, 1 + ref_held_by_me); |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 2927 | if (status) |
J. Bruce Fields | f0f51f5 | 2013-06-18 14:26:02 -0400 | [diff] [blame] | 2928 | goto out_put_session; |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 2929 | unhash_session(ses); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 2930 | spin_unlock(&nn->client_lock); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 2931 | |
J. Bruce Fields | 84f5f7c | 2010-12-09 15:52:19 -0500 | [diff] [blame] | 2932 | nfsd4_probe_callback_sync(ses->se_client); |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 2933 | |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 2934 | spin_lock(&nn->client_lock); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 2935 | status = nfs_ok; |
J. Bruce Fields | f0f51f5 | 2013-06-18 14:26:02 -0400 | [diff] [blame] | 2936 | out_put_session: |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 2937 | nfsd4_put_session_locked(ses); |
J. Bruce Fields | abcdff09 | 2013-03-14 19:55:33 -0400 | [diff] [blame] | 2938 | out_client_lock: |
| 2939 | spin_unlock(&nn->client_lock); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 2940 | out: |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 2941 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2942 | } |
| 2943 | |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 2944 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 2945 | { |
| 2946 | struct nfsd4_conn *c; |
| 2947 | |
| 2948 | list_for_each_entry(c, &s->se_conns, cn_persession) { |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 2949 | if (c->cn_xprt == xpt) { |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 2950 | return c; |
| 2951 | } |
| 2952 | } |
| 2953 | return NULL; |
| 2954 | } |
| 2955 | |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2956 | static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 2957 | { |
| 2958 | struct nfs4_client *clp = ses->se_client; |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 2959 | struct nfsd4_conn *c; |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2960 | __be32 status = nfs_ok; |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 2961 | int ret; |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 2962 | |
| 2963 | spin_lock(&clp->cl_lock); |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 2964 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2965 | if (c) |
| 2966 | goto out_free; |
| 2967 | status = nfserr_conn_not_bound_to_session; |
| 2968 | if (clp->cl_mach_cred) |
| 2969 | goto out_free; |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 2970 | __nfsd4_hash_conn(new, ses); |
| 2971 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 2972 | ret = nfsd4_register_conn(new); |
| 2973 | if (ret) |
| 2974 | /* oops; xprt is already down: */ |
| 2975 | nfsd4_conn_lost(&new->cn_xpt_user); |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 2976 | return nfs_ok; |
| 2977 | out_free: |
| 2978 | spin_unlock(&clp->cl_lock); |
| 2979 | free_conn(new); |
| 2980 | return status; |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 2981 | } |
| 2982 | |
Mi Jinlong | 868b89c | 2011-04-27 09:09:58 +0800 | [diff] [blame] | 2983 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
| 2984 | { |
| 2985 | struct nfsd4_compoundargs *args = rqstp->rq_argp; |
| 2986 | |
| 2987 | return args->opcnt > session->se_fchannel.maxops; |
| 2988 | } |
| 2989 | |
Mi Jinlong | ae82a8d | 2011-07-14 14:56:02 +0800 | [diff] [blame] | 2990 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
| 2991 | struct nfsd4_session *session) |
| 2992 | { |
| 2993 | struct xdr_buf *xb = &rqstp->rq_arg; |
| 2994 | |
| 2995 | return xb->len > session->se_fchannel.maxreq_sz; |
| 2996 | } |
| 2997 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2998 | __be32 |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2999 | nfsd4_sequence(struct svc_rqst *rqstp, |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 3000 | struct nfsd4_compound_state *cstate, |
| 3001 | struct nfsd4_sequence *seq) |
| 3002 | { |
Andy Adamson | f9bb94c4 | 2009-04-03 08:28:12 +0300 | [diff] [blame] | 3003 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
J. Bruce Fields | 47ee529 | 2014-03-12 21:39:35 -0400 | [diff] [blame] | 3004 | struct xdr_stream *xdr = &resp->xdr; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3005 | struct nfsd4_session *session; |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 3006 | struct nfs4_client *clp; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3007 | struct nfsd4_slot *slot; |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 3008 | struct nfsd4_conn *conn; |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 3009 | __be32 status; |
J. Bruce Fields | 47ee529 | 2014-03-12 21:39:35 -0400 | [diff] [blame] | 3010 | int buflen; |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 3011 | struct net *net = SVC_NET(rqstp); |
| 3012 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3013 | |
Andy Adamson | f9bb94c4 | 2009-04-03 08:28:12 +0300 | [diff] [blame] | 3014 | if (resp->opcnt != 1) |
| 3015 | return nfserr_sequence_pos; |
| 3016 | |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 3017 | /* |
| 3018 | * Will be either used or freed by nfsd4_sequence_check_conn |
| 3019 | * below. |
| 3020 | */ |
| 3021 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); |
| 3022 | if (!conn) |
| 3023 | return nfserr_jukebox; |
| 3024 | |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 3025 | spin_lock(&nn->client_lock); |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 3026 | session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3027 | if (!session) |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 3028 | goto out_no_session; |
| 3029 | clp = session->se_client; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3030 | |
Mi Jinlong | 868b89c | 2011-04-27 09:09:58 +0800 | [diff] [blame] | 3031 | status = nfserr_too_many_ops; |
| 3032 | if (nfsd4_session_too_many_ops(rqstp, session)) |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 3033 | goto out_put_session; |
Mi Jinlong | 868b89c | 2011-04-27 09:09:58 +0800 | [diff] [blame] | 3034 | |
Mi Jinlong | ae82a8d | 2011-07-14 14:56:02 +0800 | [diff] [blame] | 3035 | status = nfserr_req_too_big; |
| 3036 | if (nfsd4_request_too_big(rqstp, session)) |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 3037 | goto out_put_session; |
Mi Jinlong | ae82a8d | 2011-07-14 14:56:02 +0800 | [diff] [blame] | 3038 | |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3039 | status = nfserr_badslot; |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 3040 | if (seq->slotid >= session->se_fchannel.maxreqs) |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 3041 | goto out_put_session; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3042 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 3043 | slot = session->se_slots[seq->slotid]; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3044 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
| 3045 | |
Andy Adamson | a8dfdae | 2009-08-28 08:45:02 -0400 | [diff] [blame] | 3046 | /* We do not negotiate the number of slots yet, so set the |
| 3047 | * maxslots to the session maxreqs which is used to encode |
| 3048 | * sr_highest_slotid and the sr_target_slot id to maxslots */ |
| 3049 | seq->maxslots = session->se_fchannel.maxreqs; |
| 3050 | |
J. Bruce Fields | 73e7948 | 2012-02-13 16:39:00 -0500 | [diff] [blame] | 3051 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
| 3052 | slot->sl_flags & NFSD4_SLOT_INUSE); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3053 | if (status == nfserr_replay_cache) { |
J. Bruce Fields | bf5c43c | 2012-02-13 16:56:19 -0500 | [diff] [blame] | 3054 | status = nfserr_seq_misordered; |
| 3055 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 3056 | goto out_put_session; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3057 | cstate->slot = slot; |
| 3058 | cstate->session = session; |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 3059 | cstate->clp = clp; |
Andy Adamson | da3846a | 2009-04-03 08:28:22 +0300 | [diff] [blame] | 3060 | /* Return the cached reply status and set cstate->status |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 3061 | * for nfsd4_proc_compound processing */ |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 3062 | status = nfsd4_replay_cache_entry(resp, seq); |
Andy Adamson | da3846a | 2009-04-03 08:28:22 +0300 | [diff] [blame] | 3063 | cstate->status = nfserr_replay_cache; |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 3064 | goto out; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3065 | } |
| 3066 | if (status) |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 3067 | goto out_put_session; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3068 | |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 3069 | status = nfsd4_sequence_check_conn(conn, session); |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 3070 | conn = NULL; |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 3071 | if (status) |
| 3072 | goto out_put_session; |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 3073 | |
J. Bruce Fields | 47ee529 | 2014-03-12 21:39:35 -0400 | [diff] [blame] | 3074 | buflen = (seq->cachethis) ? |
| 3075 | session->se_fchannel.maxresp_cached : |
| 3076 | session->se_fchannel.maxresp_sz; |
| 3077 | status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : |
| 3078 | nfserr_rep_too_big; |
J. Bruce Fields | a5cddc8 | 2014-05-12 18:10:58 -0400 | [diff] [blame] | 3079 | if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) |
J. Bruce Fields | 47ee529 | 2014-03-12 21:39:35 -0400 | [diff] [blame] | 3080 | goto out_put_session; |
J. Bruce Fields | 32aaa62 | 2014-03-20 20:47:41 -0400 | [diff] [blame] | 3081 | svc_reserve(rqstp, buflen); |
J. Bruce Fields | 47ee529 | 2014-03-12 21:39:35 -0400 | [diff] [blame] | 3082 | |
| 3083 | status = nfs_ok; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3084 | /* Success! bump slot seqid */ |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3085 | slot->sl_seqid = seq->seqid; |
J. Bruce Fields | bf5c43c | 2012-02-13 16:56:19 -0500 | [diff] [blame] | 3086 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
J. Bruce Fields | 73e7948 | 2012-02-13 16:39:00 -0500 | [diff] [blame] | 3087 | if (seq->cachethis) |
| 3088 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; |
J. Bruce Fields | bf5c43c | 2012-02-13 16:56:19 -0500 | [diff] [blame] | 3089 | else |
| 3090 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3091 | |
| 3092 | cstate->slot = slot; |
| 3093 | cstate->session = session; |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 3094 | cstate->clp = clp; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3095 | |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3096 | out: |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 3097 | switch (clp->cl_cb_state) { |
| 3098 | case NFSD4_CB_DOWN: |
| 3099 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
| 3100 | break; |
| 3101 | case NFSD4_CB_FAULT: |
| 3102 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
| 3103 | break; |
| 3104 | default: |
| 3105 | seq->status_flags = 0; |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 3106 | } |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 3107 | if (!list_empty(&clp->cl_revoked)) |
| 3108 | seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 3109 | out_no_session: |
Kinglong Mee | 3f42d2c | 2014-03-24 11:56:59 +0800 | [diff] [blame] | 3110 | if (conn) |
| 3111 | free_conn(conn); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 3112 | spin_unlock(&nn->client_lock); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 3113 | return status; |
J. Bruce Fields | 66b2b9b | 2013-03-19 12:05:39 -0400 | [diff] [blame] | 3114 | out_put_session: |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 3115 | nfsd4_put_session_locked(session); |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 3116 | goto out_no_session; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 3117 | } |
| 3118 | |
Trond Myklebust | b607664 | 2014-06-30 11:48:35 -0400 | [diff] [blame] | 3119 | void |
| 3120 | nfsd4_sequence_done(struct nfsd4_compoundres *resp) |
| 3121 | { |
| 3122 | struct nfsd4_compound_state *cs = &resp->cstate; |
| 3123 | |
| 3124 | if (nfsd4_has_session(cs)) { |
Trond Myklebust | b607664 | 2014-06-30 11:48:35 -0400 | [diff] [blame] | 3125 | if (cs->status != nfserr_replay_cache) { |
| 3126 | nfsd4_store_cache_entry(resp); |
| 3127 | cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; |
| 3128 | } |
Trond Myklebust | d4e19e70 | 2014-06-30 11:48:42 -0400 | [diff] [blame] | 3129 | /* Drop session reference that was taken in nfsd4_sequence() */ |
Trond Myklebust | b607664 | 2014-06-30 11:48:35 -0400 | [diff] [blame] | 3130 | nfsd4_put_session(cs->session); |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 3131 | } else if (cs->clp) |
| 3132 | put_client_renew(cs->clp); |
Trond Myklebust | b607664 | 2014-06-30 11:48:35 -0400 | [diff] [blame] | 3133 | } |
| 3134 | |
Mi Jinlong | 345c284 | 2011-10-20 17:51:39 +0800 | [diff] [blame] | 3135 | __be32 |
| 3136 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) |
| 3137 | { |
Trond Myklebust | 6b10ad1 | 2014-07-30 08:27:08 -0400 | [diff] [blame] | 3138 | struct nfs4_client *conf, *unconf; |
| 3139 | struct nfs4_client *clp = NULL; |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 3140 | __be32 status = 0; |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 3141 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Mi Jinlong | 345c284 | 2011-10-20 17:51:39 +0800 | [diff] [blame] | 3142 | |
Trond Myklebust | 6b10ad1 | 2014-07-30 08:27:08 -0400 | [diff] [blame] | 3143 | spin_lock(&nn->client_lock); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 3144 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 3145 | conf = find_confirmed_client(&dc->clientid, true, nn); |
J. Bruce Fields | 7838904 | 2013-03-12 10:12:37 -0400 | [diff] [blame] | 3146 | WARN_ON_ONCE(conf && unconf); |
Mi Jinlong | 345c284 | 2011-10-20 17:51:39 +0800 | [diff] [blame] | 3147 | |
| 3148 | if (conf) { |
J. Bruce Fields | c0293b0 | 2013-03-14 18:20:01 -0400 | [diff] [blame] | 3149 | if (client_has_state(conf)) { |
Mi Jinlong | 345c284 | 2011-10-20 17:51:39 +0800 | [diff] [blame] | 3150 | status = nfserr_clientid_busy; |
| 3151 | goto out; |
| 3152 | } |
Jeff Layton | fd699b8 | 2014-07-30 08:27:14 -0400 | [diff] [blame] | 3153 | status = mark_client_expired_locked(conf); |
| 3154 | if (status) |
| 3155 | goto out; |
Trond Myklebust | 6b10ad1 | 2014-07-30 08:27:08 -0400 | [diff] [blame] | 3156 | clp = conf; |
Mi Jinlong | 345c284 | 2011-10-20 17:51:39 +0800 | [diff] [blame] | 3157 | } else if (unconf) |
| 3158 | clp = unconf; |
| 3159 | else { |
| 3160 | status = nfserr_stale_clientid; |
| 3161 | goto out; |
| 3162 | } |
Andrew Elble | dedeb13 | 2016-06-15 12:52:08 -0400 | [diff] [blame] | 3163 | if (!nfsd4_mach_creds_match(clp, rqstp)) { |
Trond Myklebust | 6b10ad1 | 2014-07-30 08:27:08 -0400 | [diff] [blame] | 3164 | clp = NULL; |
J. Bruce Fields | 57266a6 | 2013-04-13 14:27:29 -0400 | [diff] [blame] | 3165 | status = nfserr_wrong_cred; |
| 3166 | goto out; |
| 3167 | } |
Trond Myklebust | 6b10ad1 | 2014-07-30 08:27:08 -0400 | [diff] [blame] | 3168 | unhash_client_locked(clp); |
Mi Jinlong | 345c284 | 2011-10-20 17:51:39 +0800 | [diff] [blame] | 3169 | out: |
Trond Myklebust | 6b10ad1 | 2014-07-30 08:27:08 -0400 | [diff] [blame] | 3170 | spin_unlock(&nn->client_lock); |
Trond Myklebust | 6b10ad1 | 2014-07-30 08:27:08 -0400 | [diff] [blame] | 3171 | if (clp) |
| 3172 | expire_client(clp); |
Mi Jinlong | 345c284 | 2011-10-20 17:51:39 +0800 | [diff] [blame] | 3173 | return status; |
| 3174 | } |
| 3175 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 3176 | __be32 |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 3177 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) |
| 3178 | { |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 3179 | __be32 status = 0; |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 3180 | |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 3181 | if (rc->rca_one_fs) { |
| 3182 | if (!cstate->current_fh.fh_dentry) |
| 3183 | return nfserr_nofilehandle; |
| 3184 | /* |
| 3185 | * We don't take advantage of the rca_one_fs case. |
| 3186 | * That's OK, it's optional, we can safely ignore it. |
| 3187 | */ |
Christophe JAILLET | d28c442 | 2016-07-02 08:24:32 +0200 | [diff] [blame] | 3188 | return nfs_ok; |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 3189 | } |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 3190 | |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 3191 | status = nfserr_complete_already; |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 3192 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
| 3193 | &cstate->session->se_client->cl_flags)) |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 3194 | goto out; |
| 3195 | |
| 3196 | status = nfserr_stale_clientid; |
| 3197 | if (is_client_expired(cstate->session->se_client)) |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 3198 | /* |
| 3199 | * The following error isn't really legal. |
| 3200 | * But we only get here if the client just explicitly |
| 3201 | * destroyed the client. Surely it no longer cares what |
| 3202 | * error it gets back on an operation for the dead |
| 3203 | * client. |
| 3204 | */ |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 3205 | goto out; |
| 3206 | |
| 3207 | status = nfs_ok; |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 3208 | nfsd4_client_record_create(cstate->session->se_client); |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 3209 | out: |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 3210 | return status; |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 3211 | } |
| 3212 | |
| 3213 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 3214 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 3215 | struct nfsd4_setclientid *setclid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3216 | { |
J. Bruce Fields | a084daf | 2011-10-10 15:07:40 -0400 | [diff] [blame] | 3217 | struct xdr_netobj clname = setclid->se_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3218 | nfs4_verifier clverifier = setclid->se_verf; |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 3219 | struct nfs4_client *conf, *new; |
| 3220 | struct nfs4_client *unconf = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3221 | __be32 status; |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 3222 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| 3223 | |
Trond Myklebust | 5cc40fd | 2014-07-30 08:27:05 -0400 | [diff] [blame] | 3224 | new = create_client(clname, rqstp, &clverifier); |
| 3225 | if (new == NULL) |
| 3226 | return nfserr_jukebox; |
J. Bruce Fields | 63db463 | 2012-05-18 21:54:19 -0400 | [diff] [blame] | 3227 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 3228 | spin_lock(&nn->client_lock); |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 3229 | conf = find_confirmed_client_by_name(&clname, nn); |
J. Bruce Fields | 2b63482 | 2015-10-15 15:33:23 -0400 | [diff] [blame] | 3230 | if (conf && client_has_state(conf)) { |
J. Bruce Fields | 63db463 | 2012-05-18 21:54:19 -0400 | [diff] [blame] | 3231 | /* case 0: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3232 | status = nfserr_clid_inuse; |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 3233 | if (clp_used_exchangeid(conf)) |
| 3234 | goto out; |
J. Bruce Fields | 026722c | 2009-03-18 15:06:26 -0400 | [diff] [blame] | 3235 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 3236 | char addr_str[INET6_ADDRSTRLEN]; |
| 3237 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, |
| 3238 | sizeof(addr_str)); |
| 3239 | dprintk("NFSD: setclientid: string in use by client " |
| 3240 | "at %s\n", addr_str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3241 | goto out; |
| 3242 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3243 | } |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 3244 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
J. Bruce Fields | 8f93071 | 2012-05-18 22:06:41 -0400 | [diff] [blame] | 3245 | if (unconf) |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 3246 | unhash_client_locked(unconf); |
Kinglong Mee | 41eb167 | 2015-07-13 17:29:41 +0800 | [diff] [blame] | 3247 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) { |
J. Bruce Fields | 63db463 | 2012-05-18 21:54:19 -0400 | [diff] [blame] | 3248 | /* case 1: probable callback update */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3249 | copy_clid(new, conf); |
Kinglong Mee | 41eb167 | 2015-07-13 17:29:41 +0800 | [diff] [blame] | 3250 | gen_confirm(new, nn); |
| 3251 | } else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 3252 | gen_clid(new, nn); |
J. Bruce Fields | 8323c3b | 2010-10-19 19:36:51 -0400 | [diff] [blame] | 3253 | new->cl_minorversion = 0; |
Takuma Umeya | 6f3d772 | 2010-12-15 14:09:01 +0900 | [diff] [blame] | 3254 | gen_callback(new, setclid, rqstp); |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 3255 | add_to_unconfirmed(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3256 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
| 3257 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; |
| 3258 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); |
Trond Myklebust | 5cc40fd | 2014-07-30 08:27:05 -0400 | [diff] [blame] | 3259 | new = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3260 | status = nfs_ok; |
| 3261 | out: |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 3262 | spin_unlock(&nn->client_lock); |
Trond Myklebust | 5cc40fd | 2014-07-30 08:27:05 -0400 | [diff] [blame] | 3263 | if (new) |
| 3264 | free_client(new); |
Trond Myklebust | 3dbacee | 2014-07-30 08:27:06 -0400 | [diff] [blame] | 3265 | if (unconf) |
| 3266 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3267 | return status; |
| 3268 | } |
| 3269 | |
| 3270 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3271 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 3272 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
| 3273 | struct nfsd4_compound_state *cstate, |
| 3274 | struct nfsd4_setclientid_confirm *setclientid_confirm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3275 | { |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 3276 | struct nfs4_client *conf, *unconf; |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 3277 | struct nfs4_client *old = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3278 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
| 3279 | clientid_t * clid = &setclientid_confirm->sc_clientid; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3280 | __be32 status; |
Stanislav Kinsbursky | 7f2210f | 2012-11-14 18:21:05 +0300 | [diff] [blame] | 3281 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3282 | |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 3283 | if (STALE_CLIENTID(clid, nn)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3284 | return nfserr_stale_clientid; |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 3285 | |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 3286 | spin_lock(&nn->client_lock); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 3287 | conf = find_confirmed_client(clid, false, nn); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 3288 | unconf = find_unconfirmed_client(clid, false, nn); |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 3289 | /* |
J. Bruce Fields | 8695b90 | 2012-05-19 10:05:58 -0400 | [diff] [blame] | 3290 | * We try hard to give out unique clientid's, so if we get an |
| 3291 | * attempt to confirm the same clientid with a different cred, |
J. Bruce Fields | f984a7c | 2015-09-01 13:40:53 -0400 | [diff] [blame] | 3292 | * the client may be buggy; this should never happen. |
| 3293 | * |
| 3294 | * Nevertheless, RFC 7530 recommends INUSE for this case: |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 3295 | */ |
J. Bruce Fields | f984a7c | 2015-09-01 13:40:53 -0400 | [diff] [blame] | 3296 | status = nfserr_clid_inuse; |
J. Bruce Fields | 8695b90 | 2012-05-19 10:05:58 -0400 | [diff] [blame] | 3297 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) |
| 3298 | goto out; |
| 3299 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
| 3300 | goto out; |
J. Bruce Fields | 63db463 | 2012-05-18 21:54:19 -0400 | [diff] [blame] | 3301 | /* cases below refer to rfc 3530 section 14.2.34: */ |
J. Bruce Fields | 90d700b | 2012-05-19 13:55:22 -0400 | [diff] [blame] | 3302 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
J. Bruce Fields | 7d22fc1 | 2016-09-20 20:55:36 -0400 | [diff] [blame] | 3303 | if (conf && same_verf(&confirm, &conf->cl_confirm)) { |
| 3304 | /* case 2: probable retransmit */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3305 | status = nfs_ok; |
J. Bruce Fields | 7d22fc1 | 2016-09-20 20:55:36 -0400 | [diff] [blame] | 3306 | } else /* case 4: client hasn't noticed we rebooted yet? */ |
J. Bruce Fields | 90d700b | 2012-05-19 13:55:22 -0400 | [diff] [blame] | 3307 | status = nfserr_stale_clientid; |
| 3308 | goto out; |
| 3309 | } |
| 3310 | status = nfs_ok; |
| 3311 | if (conf) { /* case 1: callback update */ |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 3312 | old = unconf; |
| 3313 | unhash_client_locked(old); |
J. Bruce Fields | 8695b90 | 2012-05-19 10:05:58 -0400 | [diff] [blame] | 3314 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
J. Bruce Fields | 90d700b | 2012-05-19 13:55:22 -0400 | [diff] [blame] | 3315 | } else { /* case 3: normal case; new or rebooted client */ |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 3316 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
| 3317 | if (old) { |
J. Bruce Fields | 2b63482 | 2015-10-15 15:33:23 -0400 | [diff] [blame] | 3318 | status = nfserr_clid_inuse; |
| 3319 | if (client_has_state(old) |
| 3320 | && !same_creds(&unconf->cl_cred, |
| 3321 | &old->cl_cred)) |
| 3322 | goto out; |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 3323 | status = mark_client_expired_locked(old); |
Jeff Layton | 7abea1e | 2014-07-30 08:27:13 -0400 | [diff] [blame] | 3324 | if (status) { |
| 3325 | old = NULL; |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 3326 | goto out; |
Jeff Layton | 7abea1e | 2014-07-30 08:27:13 -0400 | [diff] [blame] | 3327 | } |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 3328 | } |
J. Bruce Fields | 8695b90 | 2012-05-19 10:05:58 -0400 | [diff] [blame] | 3329 | move_to_confirmed(unconf); |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 3330 | conf = unconf; |
NeilBrown | 08e8987 | 2005-06-23 22:04:11 -0700 | [diff] [blame] | 3331 | } |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 3332 | get_client_locked(conf); |
| 3333 | spin_unlock(&nn->client_lock); |
| 3334 | nfsd4_probe_callback(conf); |
| 3335 | spin_lock(&nn->client_lock); |
| 3336 | put_client_renew_locked(conf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3337 | out: |
Jeff Layton | d20c11d | 2014-07-30 08:27:07 -0400 | [diff] [blame] | 3338 | spin_unlock(&nn->client_lock); |
| 3339 | if (old) |
| 3340 | expire_client(old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3341 | return status; |
| 3342 | } |
| 3343 | |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 3344 | static struct nfs4_file *nfsd4_alloc_file(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3345 | { |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 3346 | return kmem_cache_alloc(file_slab, GFP_KERNEL); |
| 3347 | } |
| 3348 | |
| 3349 | /* OPEN Share state helper functions */ |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 3350 | static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval, |
| 3351 | struct nfs4_file *fp) |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 3352 | { |
Trond Myklebust | 950e011 | 2014-06-30 11:48:31 -0400 | [diff] [blame] | 3353 | lockdep_assert_held(&state_lock); |
| 3354 | |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 3355 | atomic_set(&fp->fi_ref, 1); |
Trond Myklebust | 1d31a25 | 2014-07-10 14:07:25 -0400 | [diff] [blame] | 3356 | spin_lock_init(&fp->fi_lock); |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 3357 | INIT_LIST_HEAD(&fp->fi_stateids); |
| 3358 | INIT_LIST_HEAD(&fp->fi_delegations); |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 3359 | INIT_LIST_HEAD(&fp->fi_clnt_odstate); |
Trond Myklebust | e2cf80d | 2014-07-23 16:17:38 -0400 | [diff] [blame] | 3360 | fh_copy_shallow(&fp->fi_fhandle, fh); |
Jeff Layton | 0c637be | 2014-08-22 12:05:43 -0400 | [diff] [blame] | 3361 | fp->fi_deleg_file = NULL; |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 3362 | fp->fi_had_conflict = false; |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 3363 | fp->fi_share_deny = 0; |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 3364 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
| 3365 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); |
Christoph Hellwig | 9cf514c | 2014-05-05 13:11:59 +0200 | [diff] [blame] | 3366 | #ifdef CONFIG_NFSD_PNFS |
| 3367 | INIT_LIST_HEAD(&fp->fi_lo_states); |
Christoph Hellwig | c5c707f | 2014-09-23 12:38:48 +0200 | [diff] [blame] | 3368 | atomic_set(&fp->fi_lo_recalls, 0); |
Christoph Hellwig | 9cf514c | 2014-05-05 13:11:59 +0200 | [diff] [blame] | 3369 | #endif |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 3370 | hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3371 | } |
| 3372 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 3373 | void |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 3374 | nfsd4_free_slabs(void) |
| 3375 | { |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 3376 | kmem_cache_destroy(odstate_slab); |
Christoph Hellwig | abf1135 | 2014-05-21 07:43:03 -0700 | [diff] [blame] | 3377 | kmem_cache_destroy(openowner_slab); |
| 3378 | kmem_cache_destroy(lockowner_slab); |
| 3379 | kmem_cache_destroy(file_slab); |
| 3380 | kmem_cache_destroy(stateid_slab); |
| 3381 | kmem_cache_destroy(deleg_slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 3382 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3383 | |
Bryan Schumaker | 7208339 | 2011-11-01 15:24:59 -0400 | [diff] [blame] | 3384 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3385 | nfsd4_init_slabs(void) |
| 3386 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3387 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
| 3388 | sizeof(struct nfs4_openowner), 0, 0, NULL); |
| 3389 | if (openowner_slab == NULL) |
Christoph Hellwig | abf1135 | 2014-05-21 07:43:03 -0700 | [diff] [blame] | 3390 | goto out; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3391 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
Yanchuan Nian | 3c40794 | 2012-10-24 14:44:19 +0800 | [diff] [blame] | 3392 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3393 | if (lockowner_slab == NULL) |
Christoph Hellwig | abf1135 | 2014-05-21 07:43:03 -0700 | [diff] [blame] | 3394 | goto out_free_openowner_slab; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 3395 | file_slab = kmem_cache_create("nfsd4_files", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 3396 | sizeof(struct nfs4_file), 0, 0, NULL); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 3397 | if (file_slab == NULL) |
Christoph Hellwig | abf1135 | 2014-05-21 07:43:03 -0700 | [diff] [blame] | 3398 | goto out_free_lockowner_slab; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 3399 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3400 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 3401 | if (stateid_slab == NULL) |
Christoph Hellwig | abf1135 | 2014-05-21 07:43:03 -0700 | [diff] [blame] | 3402 | goto out_free_file_slab; |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 3403 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 3404 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 3405 | if (deleg_slab == NULL) |
Christoph Hellwig | abf1135 | 2014-05-21 07:43:03 -0700 | [diff] [blame] | 3406 | goto out_free_stateid_slab; |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 3407 | odstate_slab = kmem_cache_create("nfsd4_odstate", |
| 3408 | sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); |
| 3409 | if (odstate_slab == NULL) |
| 3410 | goto out_free_deleg_slab; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3411 | return 0; |
Christoph Hellwig | abf1135 | 2014-05-21 07:43:03 -0700 | [diff] [blame] | 3412 | |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 3413 | out_free_deleg_slab: |
| 3414 | kmem_cache_destroy(deleg_slab); |
Christoph Hellwig | abf1135 | 2014-05-21 07:43:03 -0700 | [diff] [blame] | 3415 | out_free_stateid_slab: |
| 3416 | kmem_cache_destroy(stateid_slab); |
| 3417 | out_free_file_slab: |
| 3418 | kmem_cache_destroy(file_slab); |
| 3419 | out_free_lockowner_slab: |
| 3420 | kmem_cache_destroy(lockowner_slab); |
| 3421 | out_free_openowner_slab: |
| 3422 | kmem_cache_destroy(openowner_slab); |
| 3423 | out: |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 3424 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
| 3425 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3426 | } |
| 3427 | |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 3428 | static void init_nfs4_replay(struct nfs4_replay *rp) |
| 3429 | { |
| 3430 | rp->rp_status = nfserr_serverfault; |
| 3431 | rp->rp_buflen = 0; |
| 3432 | rp->rp_buf = rp->rp_ibuf; |
Jeff Layton | 58fb12e | 2014-07-29 21:34:27 -0400 | [diff] [blame] | 3433 | mutex_init(&rp->rp_mutex); |
| 3434 | } |
| 3435 | |
| 3436 | static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, |
| 3437 | struct nfs4_stateowner *so) |
| 3438 | { |
| 3439 | if (!nfsd4_has_session(cstate)) { |
| 3440 | mutex_lock(&so->so_replay.rp_mutex); |
Kinglong Mee | b5971af | 2014-08-22 10:18:43 -0400 | [diff] [blame] | 3441 | cstate->replay_owner = nfs4_get_stateowner(so); |
Jeff Layton | 58fb12e | 2014-07-29 21:34:27 -0400 | [diff] [blame] | 3442 | } |
| 3443 | } |
| 3444 | |
| 3445 | void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) |
| 3446 | { |
| 3447 | struct nfs4_stateowner *so = cstate->replay_owner; |
| 3448 | |
| 3449 | if (so != NULL) { |
| 3450 | cstate->replay_owner = NULL; |
| 3451 | mutex_unlock(&so->so_replay.rp_mutex); |
| 3452 | nfs4_put_stateowner(so); |
| 3453 | } |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 3454 | } |
| 3455 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3456 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3457 | { |
| 3458 | struct nfs4_stateowner *sop; |
| 3459 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3460 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 3461 | if (!sop) |
| 3462 | return NULL; |
| 3463 | |
| 3464 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); |
| 3465 | if (!sop->so_owner.data) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3466 | kmem_cache_free(slab, sop); |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 3467 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3468 | } |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 3469 | sop->so_owner.len = owner->len; |
| 3470 | |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 3471 | INIT_LIST_HEAD(&sop->so_stateids); |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 3472 | sop->so_client = clp; |
| 3473 | init_nfs4_replay(&sop->so_replay); |
Jeff Layton | 6b180f0 | 2014-07-29 21:34:26 -0400 | [diff] [blame] | 3474 | atomic_set(&sop->so_count, 1); |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 3475 | return sop; |
| 3476 | } |
| 3477 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3478 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 3479 | { |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 3480 | lockdep_assert_held(&clp->cl_lock); |
Stanislav Kinsbursky | 9b53113 | 2012-11-14 18:21:41 +0300 | [diff] [blame] | 3481 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 3482 | list_add(&oo->oo_owner.so_strhash, |
| 3483 | &clp->cl_ownerstr_hashtbl[strhashval]); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3484 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3485 | } |
| 3486 | |
Jeff Layton | 8f4b54c | 2014-07-29 21:34:29 -0400 | [diff] [blame] | 3487 | static void nfs4_unhash_openowner(struct nfs4_stateowner *so) |
| 3488 | { |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 3489 | unhash_openowner_locked(openowner(so)); |
Jeff Layton | 8f4b54c | 2014-07-29 21:34:29 -0400 | [diff] [blame] | 3490 | } |
| 3491 | |
Jeff Layton | 6b180f0 | 2014-07-29 21:34:26 -0400 | [diff] [blame] | 3492 | static void nfs4_free_openowner(struct nfs4_stateowner *so) |
| 3493 | { |
| 3494 | struct nfs4_openowner *oo = openowner(so); |
| 3495 | |
| 3496 | kmem_cache_free(openowner_slab, oo); |
| 3497 | } |
| 3498 | |
| 3499 | static const struct nfs4_stateowner_operations openowner_ops = { |
Jeff Layton | 8f4b54c | 2014-07-29 21:34:29 -0400 | [diff] [blame] | 3500 | .so_unhash = nfs4_unhash_openowner, |
| 3501 | .so_free = nfs4_free_openowner, |
Jeff Layton | 6b180f0 | 2014-07-29 21:34:26 -0400 | [diff] [blame] | 3502 | }; |
| 3503 | |
Andrew Elble | 7fc0564 | 2015-11-05 20:42:43 -0500 | [diff] [blame] | 3504 | static struct nfs4_ol_stateid * |
| 3505 | nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) |
| 3506 | { |
| 3507 | struct nfs4_ol_stateid *local, *ret = NULL; |
| 3508 | struct nfs4_openowner *oo = open->op_openowner; |
| 3509 | |
| 3510 | lockdep_assert_held(&fp->fi_lock); |
| 3511 | |
| 3512 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
| 3513 | /* ignore lock owners */ |
| 3514 | if (local->st_stateowner->so_is_open_owner == 0) |
| 3515 | continue; |
| 3516 | if (local->st_stateowner == &oo->oo_owner) { |
| 3517 | ret = local; |
| 3518 | atomic_inc(&ret->st_stid.sc_count); |
| 3519 | break; |
| 3520 | } |
| 3521 | } |
| 3522 | return ret; |
| 3523 | } |
| 3524 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3525 | static struct nfs4_openowner * |
Trond Myklebust | 13d6f66 | 2014-06-30 11:48:45 -0400 | [diff] [blame] | 3526 | alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, |
Jeff Layton | db24b3b | 2014-06-30 11:48:36 -0400 | [diff] [blame] | 3527 | struct nfsd4_compound_state *cstate) |
| 3528 | { |
Trond Myklebust | 13d6f66 | 2014-06-30 11:48:45 -0400 | [diff] [blame] | 3529 | struct nfs4_client *clp = cstate->clp; |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 3530 | struct nfs4_openowner *oo, *ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3531 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3532 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
| 3533 | if (!oo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3534 | return NULL; |
Jeff Layton | 6b180f0 | 2014-07-29 21:34:26 -0400 | [diff] [blame] | 3535 | oo->oo_owner.so_ops = &openowner_ops; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3536 | oo->oo_owner.so_is_open_owner = 1; |
| 3537 | oo->oo_owner.so_seqid = open->op_seqid; |
Jeff Layton | d3134b1 | 2014-07-29 21:34:32 -0400 | [diff] [blame] | 3538 | oo->oo_flags = 0; |
Jeff Layton | db24b3b | 2014-06-30 11:48:36 -0400 | [diff] [blame] | 3539 | if (nfsd4_has_session(cstate)) |
| 3540 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3541 | oo->oo_time = 0; |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 3542 | oo->oo_last_closed_stid = NULL; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3543 | INIT_LIST_HEAD(&oo->oo_close_lru); |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 3544 | spin_lock(&clp->cl_lock); |
| 3545 | ret = find_openstateowner_str_locked(strhashval, open, clp); |
Trond Myklebust | 7ffb588 | 2014-07-29 21:34:34 -0400 | [diff] [blame] | 3546 | if (ret == NULL) { |
| 3547 | hash_openowner(oo, clp, strhashval); |
| 3548 | ret = oo; |
| 3549 | } else |
Kinglong Mee | d50ffde | 2015-07-16 12:05:07 +0800 | [diff] [blame] | 3550 | nfs4_free_stateowner(&oo->oo_owner); |
| 3551 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 3552 | spin_unlock(&clp->cl_lock); |
Jeff Layton | c595233 | 2015-03-23 10:53:42 -0400 | [diff] [blame] | 3553 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3554 | } |
| 3555 | |
Andrew Elble | 7fc0564 | 2015-11-05 20:42:43 -0500 | [diff] [blame] | 3556 | static struct nfs4_ol_stateid * |
Oleg Drokin | 8c7245ab | 2016-06-14 23:28:06 -0400 | [diff] [blame] | 3557 | init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open) |
Andrew Elble | 7fc0564 | 2015-11-05 20:42:43 -0500 | [diff] [blame] | 3558 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3559 | |
Andrew Elble | 7fc0564 | 2015-11-05 20:42:43 -0500 | [diff] [blame] | 3560 | struct nfs4_openowner *oo = open->op_openowner; |
| 3561 | struct nfs4_ol_stateid *retstp = NULL; |
Oleg Drokin | 8c7245ab | 2016-06-14 23:28:06 -0400 | [diff] [blame] | 3562 | struct nfs4_ol_stateid *stp; |
Andrew Elble | 7fc0564 | 2015-11-05 20:42:43 -0500 | [diff] [blame] | 3563 | |
Oleg Drokin | 8c7245ab | 2016-06-14 23:28:06 -0400 | [diff] [blame] | 3564 | stp = open->op_stp; |
Oleg Drokin | 5cc1fb2 | 2016-06-14 23:28:05 -0400 | [diff] [blame] | 3565 | /* We are moving these outside of the spinlocks to avoid the warnings */ |
| 3566 | mutex_init(&stp->st_mutex); |
| 3567 | mutex_lock(&stp->st_mutex); |
| 3568 | |
Andrew Elble | 7fc0564 | 2015-11-05 20:42:43 -0500 | [diff] [blame] | 3569 | spin_lock(&oo->oo_owner.so_client->cl_lock); |
| 3570 | spin_lock(&fp->fi_lock); |
| 3571 | |
| 3572 | retstp = nfsd4_find_existing_open(fp, open); |
| 3573 | if (retstp) |
| 3574 | goto out_unlock; |
Oleg Drokin | 8c7245ab | 2016-06-14 23:28:06 -0400 | [diff] [blame] | 3575 | |
| 3576 | open->op_stp = NULL; |
Trond Myklebust | d6f2bc5 | 2014-07-29 21:34:19 -0400 | [diff] [blame] | 3577 | atomic_inc(&stp->st_stid.sc_count); |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 3578 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
Trond Myklebust | 3c87b9b | 2014-06-30 11:48:38 -0400 | [diff] [blame] | 3579 | INIT_LIST_HEAD(&stp->st_locks); |
Kinglong Mee | b5971af | 2014-08-22 10:18:43 -0400 | [diff] [blame] | 3580 | stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 3581 | get_nfs4_file(fp); |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 3582 | stp->st_stid.sc_file = fp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3583 | stp->st_access_bmap = 0; |
| 3584 | stp->st_deny_bmap = 0; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 3585 | stp->st_openstp = NULL; |
Jeff Layton | 1c755dc | 2014-07-29 21:34:12 -0400 | [diff] [blame] | 3586 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
Trond Myklebust | 1d31a25 | 2014-07-10 14:07:25 -0400 | [diff] [blame] | 3587 | list_add(&stp->st_perfile, &fp->fi_stateids); |
Andrew Elble | 7fc0564 | 2015-11-05 20:42:43 -0500 | [diff] [blame] | 3588 | |
| 3589 | out_unlock: |
Trond Myklebust | 1d31a25 | 2014-07-10 14:07:25 -0400 | [diff] [blame] | 3590 | spin_unlock(&fp->fi_lock); |
Jeff Layton | 1c755dc | 2014-07-29 21:34:12 -0400 | [diff] [blame] | 3591 | spin_unlock(&oo->oo_owner.so_client->cl_lock); |
Oleg Drokin | 5cc1fb2 | 2016-06-14 23:28:05 -0400 | [diff] [blame] | 3592 | if (retstp) { |
| 3593 | mutex_lock(&retstp->st_mutex); |
Oleg Drokin | 8c7245ab | 2016-06-14 23:28:06 -0400 | [diff] [blame] | 3594 | /* To keep mutex tracking happy */ |
Oleg Drokin | 5cc1fb2 | 2016-06-14 23:28:05 -0400 | [diff] [blame] | 3595 | mutex_unlock(&stp->st_mutex); |
Oleg Drokin | 8c7245ab | 2016-06-14 23:28:06 -0400 | [diff] [blame] | 3596 | stp = retstp; |
Oleg Drokin | 5cc1fb2 | 2016-06-14 23:28:05 -0400 | [diff] [blame] | 3597 | } |
Oleg Drokin | 8c7245ab | 2016-06-14 23:28:06 -0400 | [diff] [blame] | 3598 | return stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3599 | } |
| 3600 | |
Jeff Layton | d3134b1 | 2014-07-29 21:34:32 -0400 | [diff] [blame] | 3601 | /* |
| 3602 | * In the 4.0 case we need to keep the owners around a little while to handle |
| 3603 | * CLOSE replay. We still do need to release any file access that is held by |
| 3604 | * them before returning however. |
| 3605 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3606 | static void |
Jeff Layton | d3134b1 | 2014-07-29 21:34:32 -0400 | [diff] [blame] | 3607 | move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3608 | { |
Jeff Layton | 217526e | 2014-07-30 08:27:11 -0400 | [diff] [blame] | 3609 | struct nfs4_ol_stateid *last; |
Jeff Layton | d3134b1 | 2014-07-29 21:34:32 -0400 | [diff] [blame] | 3610 | struct nfs4_openowner *oo = openowner(s->st_stateowner); |
| 3611 | struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, |
| 3612 | nfsd_net_id); |
Stanislav Kinsbursky | 73758fed | 2012-11-14 18:22:01 +0300 | [diff] [blame] | 3613 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3614 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3615 | |
Jeff Layton | b401be22 | 2014-07-29 21:34:33 -0400 | [diff] [blame] | 3616 | /* |
| 3617 | * We know that we hold one reference via nfsd4_close, and another |
| 3618 | * "persistent" reference for the client. If the refcount is higher |
| 3619 | * than 2, then there are still calls in progress that are using this |
| 3620 | * stateid. We can't put the sc_file reference until they are finished. |
| 3621 | * Wait for the refcount to drop to 2. Since it has been unhashed, |
| 3622 | * there should be no danger of the refcount going back up again at |
| 3623 | * this point. |
| 3624 | */ |
| 3625 | wait_event(close_wq, atomic_read(&s->st_stid.sc_count) == 2); |
| 3626 | |
Jeff Layton | d3134b1 | 2014-07-29 21:34:32 -0400 | [diff] [blame] | 3627 | release_all_access(s); |
| 3628 | if (s->st_stid.sc_file) { |
| 3629 | put_nfs4_file(s->st_stid.sc_file); |
| 3630 | s->st_stid.sc_file = NULL; |
| 3631 | } |
Jeff Layton | 217526e | 2014-07-30 08:27:11 -0400 | [diff] [blame] | 3632 | |
| 3633 | spin_lock(&nn->client_lock); |
| 3634 | last = oo->oo_last_closed_stid; |
Jeff Layton | d3134b1 | 2014-07-29 21:34:32 -0400 | [diff] [blame] | 3635 | oo->oo_last_closed_stid = s; |
Stanislav Kinsbursky | 73758fed | 2012-11-14 18:22:01 +0300 | [diff] [blame] | 3636 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3637 | oo->oo_time = get_seconds(); |
Jeff Layton | 217526e | 2014-07-30 08:27:11 -0400 | [diff] [blame] | 3638 | spin_unlock(&nn->client_lock); |
| 3639 | if (last) |
| 3640 | nfs4_put_stid(&last->st_stid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3641 | } |
| 3642 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3643 | /* search file_hashtbl[] for file */ |
| 3644 | static struct nfs4_file * |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 3645 | find_file_locked(struct knfsd_fh *fh, unsigned int hashval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3646 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3647 | struct nfs4_file *fp; |
| 3648 | |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 3649 | hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash) { |
Christoph Hellwig | 4d94c2e | 2014-08-14 08:41:48 +0200 | [diff] [blame] | 3650 | if (fh_match(&fp->fi_fhandle, fh)) { |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 3651 | if (atomic_inc_not_zero(&fp->fi_ref)) |
| 3652 | return fp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 3653 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3654 | } |
| 3655 | return NULL; |
| 3656 | } |
| 3657 | |
Christoph Hellwig | e6ba76e | 2014-08-14 08:50:16 +0200 | [diff] [blame] | 3658 | struct nfs4_file * |
Trond Myklebust | ca94321 | 2014-07-23 16:17:39 -0400 | [diff] [blame] | 3659 | find_file(struct knfsd_fh *fh) |
Trond Myklebust | 950e011 | 2014-06-30 11:48:31 -0400 | [diff] [blame] | 3660 | { |
| 3661 | struct nfs4_file *fp; |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 3662 | unsigned int hashval = file_hashval(fh); |
Trond Myklebust | 950e011 | 2014-06-30 11:48:31 -0400 | [diff] [blame] | 3663 | |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 3664 | rcu_read_lock(); |
| 3665 | fp = find_file_locked(fh, hashval); |
| 3666 | rcu_read_unlock(); |
Trond Myklebust | 950e011 | 2014-06-30 11:48:31 -0400 | [diff] [blame] | 3667 | return fp; |
| 3668 | } |
| 3669 | |
| 3670 | static struct nfs4_file * |
Jeff Layton | f9c00c3 | 2014-07-23 16:17:41 -0400 | [diff] [blame] | 3671 | find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) |
Trond Myklebust | 950e011 | 2014-06-30 11:48:31 -0400 | [diff] [blame] | 3672 | { |
| 3673 | struct nfs4_file *fp; |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 3674 | unsigned int hashval = file_hashval(fh); |
| 3675 | |
| 3676 | rcu_read_lock(); |
| 3677 | fp = find_file_locked(fh, hashval); |
| 3678 | rcu_read_unlock(); |
| 3679 | if (fp) |
| 3680 | return fp; |
Trond Myklebust | 950e011 | 2014-06-30 11:48:31 -0400 | [diff] [blame] | 3681 | |
| 3682 | spin_lock(&state_lock); |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 3683 | fp = find_file_locked(fh, hashval); |
| 3684 | if (likely(fp == NULL)) { |
| 3685 | nfsd4_init_file(fh, hashval, new); |
Trond Myklebust | 950e011 | 2014-06-30 11:48:31 -0400 | [diff] [blame] | 3686 | fp = new; |
| 3687 | } |
| 3688 | spin_unlock(&state_lock); |
| 3689 | |
| 3690 | return fp; |
| 3691 | } |
| 3692 | |
J. Bruce Fields | 4f83aa3 | 2008-07-07 15:02:02 -0400 | [diff] [blame] | 3693 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3694 | * Called to check deny when READ with all zero stateid or |
| 3695 | * WRITE with all zero or all one stateid |
| 3696 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3697 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3698 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
| 3699 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3700 | struct nfs4_file *fp; |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 3701 | __be32 ret = nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3702 | |
Trond Myklebust | ca94321 | 2014-07-23 16:17:39 -0400 | [diff] [blame] | 3703 | fp = find_file(¤t_fh->fh_handle); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 3704 | if (!fp) |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 3705 | return ret; |
| 3706 | /* Check for conflicting share reservations */ |
Trond Myklebust | 1d31a25 | 2014-07-10 14:07:25 -0400 | [diff] [blame] | 3707 | spin_lock(&fp->fi_lock); |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 3708 | if (fp->fi_share_deny & deny_type) |
| 3709 | ret = nfserr_locked; |
Trond Myklebust | 1d31a25 | 2014-07-10 14:07:25 -0400 | [diff] [blame] | 3710 | spin_unlock(&fp->fi_lock); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 3711 | put_nfs4_file(fp); |
| 3712 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3713 | } |
| 3714 | |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 3715 | static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3716 | { |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 3717 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 3718 | struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, |
| 3719 | nfsd_net_id); |
J. Bruce Fields | e8c69d1 | 2013-03-21 15:19:33 -0400 | [diff] [blame] | 3720 | |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 3721 | block_delegations(&dp->dl_stid.sc_file->fi_fhandle); |
Jeff Layton | f54fe96 | 2014-07-25 07:34:26 -0400 | [diff] [blame] | 3722 | |
Jeff Layton | 02e1215 | 2014-07-16 10:31:57 -0400 | [diff] [blame] | 3723 | /* |
| 3724 | * We can't do this in nfsd_break_deleg_cb because it is |
Jeff Layton | f54fe96 | 2014-07-25 07:34:26 -0400 | [diff] [blame] | 3725 | * already holding inode->i_lock. |
| 3726 | * |
Jeff Layton | dff1399 | 2014-07-08 14:02:49 -0400 | [diff] [blame] | 3727 | * If the dl_time != 0, then we know that it has already been |
| 3728 | * queued for a lease break. Don't queue it again. |
| 3729 | */ |
Jeff Layton | f54fe96 | 2014-07-25 07:34:26 -0400 | [diff] [blame] | 3730 | spin_lock(&state_lock); |
Jeff Layton | dff1399 | 2014-07-08 14:02:49 -0400 | [diff] [blame] | 3731 | if (dp->dl_time == 0) { |
Jeff Layton | dff1399 | 2014-07-08 14:02:49 -0400 | [diff] [blame] | 3732 | dp->dl_time = get_seconds(); |
Jeff Layton | 02e1215 | 2014-07-16 10:31:57 -0400 | [diff] [blame] | 3733 | list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); |
Jeff Layton | dff1399 | 2014-07-08 14:02:49 -0400 | [diff] [blame] | 3734 | } |
Jeff Layton | 02e1215 | 2014-07-16 10:31:57 -0400 | [diff] [blame] | 3735 | spin_unlock(&state_lock); |
| 3736 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3737 | |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 3738 | static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, |
| 3739 | struct rpc_task *task) |
| 3740 | { |
| 3741 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
| 3742 | |
Andrew Elble | a457974 | 2015-08-31 12:06:41 -0400 | [diff] [blame] | 3743 | if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID) |
| 3744 | return 1; |
| 3745 | |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 3746 | switch (task->tk_status) { |
| 3747 | case 0: |
| 3748 | return 1; |
| 3749 | case -EBADHANDLE: |
| 3750 | case -NFS4ERR_BAD_STATEID: |
| 3751 | /* |
| 3752 | * Race: client probably got cb_recall before open reply |
| 3753 | * granting delegation. |
| 3754 | */ |
| 3755 | if (dp->dl_retries--) { |
| 3756 | rpc_delay(task, 2 * HZ); |
| 3757 | return 0; |
| 3758 | } |
| 3759 | /*FALLTHRU*/ |
| 3760 | default: |
| 3761 | return -1; |
| 3762 | } |
| 3763 | } |
| 3764 | |
| 3765 | static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) |
| 3766 | { |
| 3767 | struct nfs4_delegation *dp = cb_to_delegation(cb); |
| 3768 | |
| 3769 | nfs4_put_stid(&dp->dl_stid); |
| 3770 | } |
| 3771 | |
Julia Lawall | c4cb897 | 2015-11-21 22:57:39 +0100 | [diff] [blame] | 3772 | static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { |
Christoph Hellwig | 0162ac2 | 2014-09-24 12:19:19 +0200 | [diff] [blame] | 3773 | .prepare = nfsd4_cb_recall_prepare, |
| 3774 | .done = nfsd4_cb_recall_done, |
| 3775 | .release = nfsd4_cb_recall_release, |
| 3776 | }; |
| 3777 | |
Jeff Layton | 02e1215 | 2014-07-16 10:31:57 -0400 | [diff] [blame] | 3778 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
| 3779 | { |
| 3780 | /* |
| 3781 | * We're assuming the state code never drops its reference |
| 3782 | * without first removing the lease. Since we're in this lease |
| 3783 | * callback (and since the lease code is serialized by the kernel |
| 3784 | * lock) we know the server hasn't removed the lease yet, we know |
| 3785 | * it's safe to take a reference. |
| 3786 | */ |
Trond Myklebust | 72c0b0f | 2014-07-21 09:34:58 -0400 | [diff] [blame] | 3787 | atomic_inc(&dp->dl_stid.sc_count); |
Christoph Hellwig | f0b5de1 | 2014-09-24 12:19:18 +0200 | [diff] [blame] | 3788 | nfsd4_run_cb(&dp->dl_recall); |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 3789 | } |
| 3790 | |
Jeff Layton | 1c8c601 | 2013-06-21 08:58:15 -0400 | [diff] [blame] | 3791 | /* Called from break_lease() with i_lock held. */ |
Jeff Layton | 4d01b7f | 2014-09-01 15:06:54 -0400 | [diff] [blame] | 3792 | static bool |
| 3793 | nfsd_break_deleg_cb(struct file_lock *fl) |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 3794 | { |
Jeff Layton | 4d01b7f | 2014-09-01 15:06:54 -0400 | [diff] [blame] | 3795 | bool ret = false; |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 3796 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
| 3797 | struct nfs4_delegation *dp; |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 3798 | |
J. Bruce Fields | 7fa10cd | 2012-10-16 12:39:33 -0400 | [diff] [blame] | 3799 | if (!fp) { |
| 3800 | WARN(1, "(%p)->fl_owner NULL\n", fl); |
Jeff Layton | 4d01b7f | 2014-09-01 15:06:54 -0400 | [diff] [blame] | 3801 | return ret; |
J. Bruce Fields | 7fa10cd | 2012-10-16 12:39:33 -0400 | [diff] [blame] | 3802 | } |
| 3803 | if (fp->fi_had_conflict) { |
| 3804 | WARN(1, "duplicate break on %p\n", fp); |
Jeff Layton | 4d01b7f | 2014-09-01 15:06:54 -0400 | [diff] [blame] | 3805 | return ret; |
J. Bruce Fields | 7fa10cd | 2012-10-16 12:39:33 -0400 | [diff] [blame] | 3806 | } |
J. Bruce Fields | 0272e1f | 2007-09-12 18:56:12 -0400 | [diff] [blame] | 3807 | /* |
| 3808 | * We don't want the locks code to timeout the lease for us; |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 3809 | * we'll remove it ourself if a delegation isn't returned |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 3810 | * in time: |
J. Bruce Fields | 0272e1f | 2007-09-12 18:56:12 -0400 | [diff] [blame] | 3811 | */ |
| 3812 | fl->fl_break_time = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3813 | |
Jeff Layton | 02e1215 | 2014-07-16 10:31:57 -0400 | [diff] [blame] | 3814 | spin_lock(&fp->fi_lock); |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 3815 | fp->fi_had_conflict = true; |
| 3816 | /* |
Jeff Layton | 4d01b7f | 2014-09-01 15:06:54 -0400 | [diff] [blame] | 3817 | * If there are no delegations on the list, then return true |
| 3818 | * so that the lease code will go ahead and delete it. |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 3819 | */ |
| 3820 | if (list_empty(&fp->fi_delegations)) |
Jeff Layton | 4d01b7f | 2014-09-01 15:06:54 -0400 | [diff] [blame] | 3821 | ret = true; |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 3822 | else |
| 3823 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) |
| 3824 | nfsd_break_one_deleg(dp); |
Jeff Layton | 02e1215 | 2014-07-16 10:31:57 -0400 | [diff] [blame] | 3825 | spin_unlock(&fp->fi_lock); |
Jeff Layton | 4d01b7f | 2014-09-01 15:06:54 -0400 | [diff] [blame] | 3826 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3827 | } |
| 3828 | |
Jeff Layton | c45198e | 2014-09-01 07:12:07 -0400 | [diff] [blame] | 3829 | static int |
Jeff Layton | 7448cc3 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 3830 | nfsd_change_deleg_cb(struct file_lock *onlist, int arg, |
| 3831 | struct list_head *dispose) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3832 | { |
| 3833 | if (arg & F_UNLCK) |
Jeff Layton | c45198e | 2014-09-01 07:12:07 -0400 | [diff] [blame] | 3834 | return lease_modify(onlist, arg, dispose); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3835 | else |
| 3836 | return -EAGAIN; |
| 3837 | } |
| 3838 | |
Alexey Dobriyan | 7b02196 | 2009-09-21 17:01:12 -0700 | [diff] [blame] | 3839 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
J. Bruce Fields | 8fb47a4 | 2011-07-20 20:21:59 -0400 | [diff] [blame] | 3840 | .lm_break = nfsd_break_deleg_cb, |
| 3841 | .lm_change = nfsd_change_deleg_cb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3842 | }; |
| 3843 | |
J. Bruce Fields | 7a8711c | 2011-09-02 09:03:37 -0400 | [diff] [blame] | 3844 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
| 3845 | { |
| 3846 | if (nfsd4_has_session(cstate)) |
| 3847 | return nfs_ok; |
| 3848 | if (seqid == so->so_seqid - 1) |
| 3849 | return nfserr_replay_me; |
| 3850 | if (seqid == so->so_seqid) |
| 3851 | return nfs_ok; |
| 3852 | return nfserr_bad_seqid; |
| 3853 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3854 | |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 3855 | static __be32 lookup_clientid(clientid_t *clid, |
| 3856 | struct nfsd4_compound_state *cstate, |
| 3857 | struct nfsd_net *nn) |
| 3858 | { |
| 3859 | struct nfs4_client *found; |
| 3860 | |
| 3861 | if (cstate->clp) { |
| 3862 | found = cstate->clp; |
| 3863 | if (!same_clid(&found->cl_clientid, clid)) |
| 3864 | return nfserr_stale_clientid; |
| 3865 | return nfs_ok; |
| 3866 | } |
| 3867 | |
| 3868 | if (STALE_CLIENTID(clid, nn)) |
| 3869 | return nfserr_stale_clientid; |
| 3870 | |
| 3871 | /* |
| 3872 | * For v4.1+ we get the client in the SEQUENCE op. If we don't have one |
| 3873 | * cached already then we know this is for is for v4.0 and "sessions" |
| 3874 | * will be false. |
| 3875 | */ |
| 3876 | WARN_ON_ONCE(cstate->session); |
Trond Myklebust | 3e339f9 | 2014-07-30 08:27:09 -0400 | [diff] [blame] | 3877 | spin_lock(&nn->client_lock); |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 3878 | found = find_confirmed_client(clid, false, nn); |
Trond Myklebust | 3e339f9 | 2014-07-30 08:27:09 -0400 | [diff] [blame] | 3879 | if (!found) { |
| 3880 | spin_unlock(&nn->client_lock); |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 3881 | return nfserr_expired; |
Trond Myklebust | 3e339f9 | 2014-07-30 08:27:09 -0400 | [diff] [blame] | 3882 | } |
| 3883 | atomic_inc(&found->cl_refcount); |
| 3884 | spin_unlock(&nn->client_lock); |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 3885 | |
| 3886 | /* Cache the nfs4_client in cstate! */ |
| 3887 | cstate->clp = found; |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 3888 | return nfs_ok; |
| 3889 | } |
| 3890 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3891 | __be32 |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3892 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3893 | struct nfsd4_open *open, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3894 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3895 | clientid_t *clientid = &open->op_clientid; |
| 3896 | struct nfs4_client *clp = NULL; |
| 3897 | unsigned int strhashval; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3898 | struct nfs4_openowner *oo = NULL; |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 3899 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3900 | |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 3901 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3902 | return nfserr_stale_clientid; |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 3903 | /* |
| 3904 | * In case we need it later, after we've already created the |
| 3905 | * file and don't want to risk a further failure: |
| 3906 | */ |
| 3907 | open->op_file = nfsd4_alloc_file(); |
| 3908 | if (open->op_file == NULL) |
| 3909 | return nfserr_jukebox; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3910 | |
Trond Myklebust | 2d91e89 | 2014-06-30 11:48:46 -0400 | [diff] [blame] | 3911 | status = lookup_clientid(clientid, cstate, nn); |
| 3912 | if (status) |
| 3913 | return status; |
| 3914 | clp = cstate->clp; |
| 3915 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 3916 | strhashval = ownerstr_hashval(&open->op_owner); |
| 3917 | oo = find_openstateowner_str(strhashval, open, clp); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3918 | open->op_openowner = oo; |
| 3919 | if (!oo) { |
J. Bruce Fields | bcf130f | 2011-10-12 20:44:20 -0400 | [diff] [blame] | 3920 | goto new_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3921 | } |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3922 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 3923 | /* Replace unconfirmed owners without checking for replay. */ |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3924 | release_openowner(oo); |
| 3925 | open->op_openowner = NULL; |
J. Bruce Fields | bcf130f | 2011-10-12 20:44:20 -0400 | [diff] [blame] | 3926 | goto new_owner; |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 3927 | } |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 3928 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
| 3929 | if (status) |
| 3930 | return status; |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 3931 | goto alloc_stateid; |
J. Bruce Fields | bcf130f | 2011-10-12 20:44:20 -0400 | [diff] [blame] | 3932 | new_owner: |
Trond Myklebust | 13d6f66 | 2014-06-30 11:48:45 -0400 | [diff] [blame] | 3933 | oo = alloc_init_open_stateowner(strhashval, open, cstate); |
J. Bruce Fields | bcf130f | 2011-10-12 20:44:20 -0400 | [diff] [blame] | 3934 | if (oo == NULL) |
| 3935 | return nfserr_jukebox; |
| 3936 | open->op_openowner = oo; |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 3937 | alloc_stateid: |
Jeff Layton | b49e084 | 2014-07-29 21:34:11 -0400 | [diff] [blame] | 3938 | open->op_stp = nfs4_alloc_open_stateid(clp); |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 3939 | if (!open->op_stp) |
| 3940 | return nfserr_jukebox; |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 3941 | |
| 3942 | if (nfsd4_has_session(cstate) && |
| 3943 | (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { |
| 3944 | open->op_odstate = alloc_clnt_odstate(clp); |
| 3945 | if (!open->op_odstate) |
| 3946 | return nfserr_jukebox; |
| 3947 | } |
| 3948 | |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 3949 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3950 | } |
| 3951 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3952 | static inline __be32 |
NeilBrown | 4a6e43e | 2005-06-23 22:02:50 -0700 | [diff] [blame] | 3953 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
| 3954 | { |
| 3955 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) |
| 3956 | return nfserr_openmode; |
| 3957 | else |
| 3958 | return nfs_ok; |
| 3959 | } |
| 3960 | |
Daniel Mack | c47d832 | 2011-05-16 16:38:14 +0200 | [diff] [blame] | 3961 | static int share_access_to_flags(u32 share_access) |
J. Bruce Fields | 24a0111 | 2010-05-18 20:01:35 -0400 | [diff] [blame] | 3962 | { |
J. Bruce Fields | 24a0111 | 2010-05-18 20:01:35 -0400 | [diff] [blame] | 3963 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
| 3964 | } |
| 3965 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3966 | static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) |
J. Bruce Fields | f459e45 | 2011-09-09 09:06:12 -0400 | [diff] [blame] | 3967 | { |
| 3968 | struct nfs4_stid *ret; |
| 3969 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3970 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
J. Bruce Fields | f459e45 | 2011-09-09 09:06:12 -0400 | [diff] [blame] | 3971 | if (!ret) |
| 3972 | return NULL; |
| 3973 | return delegstateid(ret); |
| 3974 | } |
| 3975 | |
J. Bruce Fields | 8b289b2 | 2011-10-19 11:52:12 -0400 | [diff] [blame] | 3976 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
| 3977 | { |
| 3978 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || |
| 3979 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; |
| 3980 | } |
| 3981 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3982 | static __be32 |
J. Bruce Fields | 41d2266 | 2013-03-21 15:49:47 -0400 | [diff] [blame] | 3983 | nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 3984 | struct nfs4_delegation **dp) |
| 3985 | { |
| 3986 | int flags; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3987 | __be32 status = nfserr_bad_stateid; |
Trond Myklebust | dcd94cc | 2014-07-29 21:34:18 -0400 | [diff] [blame] | 3988 | struct nfs4_delegation *deleg; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 3989 | |
Trond Myklebust | dcd94cc | 2014-07-29 21:34:18 -0400 | [diff] [blame] | 3990 | deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); |
| 3991 | if (deleg == NULL) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 3992 | goto out; |
J. Bruce Fields | 24a0111 | 2010-05-18 20:01:35 -0400 | [diff] [blame] | 3993 | flags = share_access_to_flags(open->op_share_access); |
Trond Myklebust | dcd94cc | 2014-07-29 21:34:18 -0400 | [diff] [blame] | 3994 | status = nfs4_check_delegmode(deleg, flags); |
| 3995 | if (status) { |
| 3996 | nfs4_put_stid(&deleg->dl_stid); |
| 3997 | goto out; |
| 3998 | } |
| 3999 | *dp = deleg; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 4000 | out: |
J. Bruce Fields | 8b289b2 | 2011-10-19 11:52:12 -0400 | [diff] [blame] | 4001 | if (!nfsd4_is_deleg_cur(open)) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 4002 | return nfs_ok; |
| 4003 | if (status) |
| 4004 | return status; |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 4005 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 4006 | return nfs_ok; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 4007 | } |
| 4008 | |
J. Bruce Fields | 21fb401 | 2010-07-28 12:21:23 -0400 | [diff] [blame] | 4009 | static inline int nfs4_access_to_access(u32 nfs4_access) |
| 4010 | { |
| 4011 | int flags = 0; |
| 4012 | |
| 4013 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) |
| 4014 | flags |= NFSD_MAY_READ; |
| 4015 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) |
| 4016 | flags |= NFSD_MAY_WRITE; |
| 4017 | return flags; |
| 4018 | } |
| 4019 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4020 | static inline __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4021 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
| 4022 | struct nfsd4_open *open) |
| 4023 | { |
| 4024 | struct iattr iattr = { |
| 4025 | .ia_valid = ATTR_SIZE, |
| 4026 | .ia_size = 0, |
| 4027 | }; |
| 4028 | if (!open->op_truncate) |
| 4029 | return 0; |
| 4030 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) |
Al Viro | 9246585 | 2006-01-18 17:43:46 -0800 | [diff] [blame] | 4031 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4032 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
| 4033 | } |
| 4034 | |
Christoph Hellwig | 7e6a72e | 2014-06-30 11:48:30 -0400 | [diff] [blame] | 4035 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
Jeff Layton | 6eb3a1d | 2014-07-10 14:07:31 -0400 | [diff] [blame] | 4036 | struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, |
| 4037 | struct nfsd4_open *open) |
Christoph Hellwig | 7e6a72e | 2014-06-30 11:48:30 -0400 | [diff] [blame] | 4038 | { |
Trond Myklebust | de18643 | 2014-07-10 14:07:26 -0400 | [diff] [blame] | 4039 | struct file *filp = NULL; |
Christoph Hellwig | 7e6a72e | 2014-06-30 11:48:30 -0400 | [diff] [blame] | 4040 | __be32 status; |
| 4041 | int oflag = nfs4_access_to_omode(open->op_share_access); |
| 4042 | int access = nfs4_access_to_access(open->op_share_access); |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 4043 | unsigned char old_access_bmap, old_deny_bmap; |
Christoph Hellwig | 7e6a72e | 2014-06-30 11:48:30 -0400 | [diff] [blame] | 4044 | |
Trond Myklebust | de18643 | 2014-07-10 14:07:26 -0400 | [diff] [blame] | 4045 | spin_lock(&fp->fi_lock); |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 4046 | |
| 4047 | /* |
| 4048 | * Are we trying to set a deny mode that would conflict with |
| 4049 | * current access? |
| 4050 | */ |
| 4051 | status = nfs4_file_check_deny(fp, open->op_share_deny); |
| 4052 | if (status != nfs_ok) { |
| 4053 | spin_unlock(&fp->fi_lock); |
| 4054 | goto out; |
| 4055 | } |
| 4056 | |
| 4057 | /* set access to the file */ |
| 4058 | status = nfs4_file_get_access(fp, open->op_share_access); |
| 4059 | if (status != nfs_ok) { |
| 4060 | spin_unlock(&fp->fi_lock); |
| 4061 | goto out; |
| 4062 | } |
| 4063 | |
| 4064 | /* Set access bits in stateid */ |
| 4065 | old_access_bmap = stp->st_access_bmap; |
| 4066 | set_access(open->op_share_access, stp); |
| 4067 | |
| 4068 | /* Set new deny mask */ |
| 4069 | old_deny_bmap = stp->st_deny_bmap; |
| 4070 | set_deny(open->op_share_deny, stp); |
| 4071 | fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); |
| 4072 | |
Christoph Hellwig | 7e6a72e | 2014-06-30 11:48:30 -0400 | [diff] [blame] | 4073 | if (!fp->fi_fds[oflag]) { |
Trond Myklebust | de18643 | 2014-07-10 14:07:26 -0400 | [diff] [blame] | 4074 | spin_unlock(&fp->fi_lock); |
| 4075 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, &filp); |
Christoph Hellwig | 7e6a72e | 2014-06-30 11:48:30 -0400 | [diff] [blame] | 4076 | if (status) |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 4077 | goto out_put_access; |
Trond Myklebust | de18643 | 2014-07-10 14:07:26 -0400 | [diff] [blame] | 4078 | spin_lock(&fp->fi_lock); |
| 4079 | if (!fp->fi_fds[oflag]) { |
| 4080 | fp->fi_fds[oflag] = filp; |
| 4081 | filp = NULL; |
| 4082 | } |
Christoph Hellwig | 7e6a72e | 2014-06-30 11:48:30 -0400 | [diff] [blame] | 4083 | } |
Trond Myklebust | de18643 | 2014-07-10 14:07:26 -0400 | [diff] [blame] | 4084 | spin_unlock(&fp->fi_lock); |
| 4085 | if (filp) |
| 4086 | fput(filp); |
Christoph Hellwig | 7e6a72e | 2014-06-30 11:48:30 -0400 | [diff] [blame] | 4087 | |
| 4088 | status = nfsd4_truncate(rqstp, cur_fh, open); |
| 4089 | if (status) |
| 4090 | goto out_put_access; |
Christoph Hellwig | 7e6a72e | 2014-06-30 11:48:30 -0400 | [diff] [blame] | 4091 | out: |
| 4092 | return status; |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 4093 | out_put_access: |
| 4094 | stp->st_access_bmap = old_access_bmap; |
| 4095 | nfs4_file_put_access(fp, open->op_share_access); |
| 4096 | reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); |
| 4097 | goto out; |
Christoph Hellwig | 7e6a72e | 2014-06-30 11:48:30 -0400 | [diff] [blame] | 4098 | } |
| 4099 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4100 | static __be32 |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4101 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4102 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4103 | __be32 status; |
Arnd Bergmann | 6ac7536 | 2015-05-12 23:31:29 +0200 | [diff] [blame] | 4104 | unsigned char old_deny_bmap = stp->st_deny_bmap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4105 | |
Jeff Layton | 6eb3a1d | 2014-07-10 14:07:31 -0400 | [diff] [blame] | 4106 | if (!test_access(open->op_share_access, stp)) |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 4107 | return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); |
Christoph Hellwig | 7e6a72e | 2014-06-30 11:48:30 -0400 | [diff] [blame] | 4108 | |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 4109 | /* test and set deny mode */ |
| 4110 | spin_lock(&fp->fi_lock); |
| 4111 | status = nfs4_file_check_deny(fp, open->op_share_deny); |
| 4112 | if (status == nfs_ok) { |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 4113 | set_deny(open->op_share_deny, stp); |
| 4114 | fp->fi_share_deny |= |
| 4115 | (open->op_share_deny & NFS4_SHARE_DENY_BOTH); |
| 4116 | } |
| 4117 | spin_unlock(&fp->fi_lock); |
| 4118 | |
| 4119 | if (status != nfs_ok) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4120 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4121 | |
Jeff Layton | baeb4ff | 2014-07-10 14:07:34 -0400 | [diff] [blame] | 4122 | status = nfsd4_truncate(rqstp, cur_fh, open); |
| 4123 | if (status != nfs_ok) |
| 4124 | reset_union_bmap_deny(old_deny_bmap, stp); |
| 4125 | return status; |
| 4126 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4127 | |
J. Bruce Fields | 14a24e9 | 2010-12-10 19:02:49 -0500 | [diff] [blame] | 4128 | /* Should we give out recallable state?: */ |
| 4129 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) |
| 4130 | { |
| 4131 | if (clp->cl_cb_state == NFSD4_CB_UP) |
| 4132 | return true; |
| 4133 | /* |
| 4134 | * In the sessions case, since we don't have to establish a |
| 4135 | * separate connection for callbacks, we assume it's OK |
| 4136 | * until we hear otherwise: |
| 4137 | */ |
| 4138 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; |
| 4139 | } |
| 4140 | |
Jeff Layton | d564fbe | 2014-07-16 10:31:58 -0400 | [diff] [blame] | 4141 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_file *fp, int flag) |
J. Bruce Fields | 22d38c4 | 2011-01-31 11:55:12 -0500 | [diff] [blame] | 4142 | { |
| 4143 | struct file_lock *fl; |
| 4144 | |
| 4145 | fl = locks_alloc_lock(); |
| 4146 | if (!fl) |
| 4147 | return NULL; |
J. Bruce Fields | 22d38c4 | 2011-01-31 11:55:12 -0500 | [diff] [blame] | 4148 | fl->fl_lmops = &nfsd_lease_mng_ops; |
J. Bruce Fields | 617588d | 2011-07-01 15:18:34 -0400 | [diff] [blame] | 4149 | fl->fl_flags = FL_DELEG; |
J. Bruce Fields | 22d38c4 | 2011-01-31 11:55:12 -0500 | [diff] [blame] | 4150 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
| 4151 | fl->fl_end = OFFSET_MAX; |
Jeff Layton | d564fbe | 2014-07-16 10:31:58 -0400 | [diff] [blame] | 4152 | fl->fl_owner = (fl_owner_t)fp; |
J. Bruce Fields | 22d38c4 | 2011-01-31 11:55:12 -0500 | [diff] [blame] | 4153 | fl->fl_pid = current->tgid; |
J. Bruce Fields | 22d38c4 | 2011-01-31 11:55:12 -0500 | [diff] [blame] | 4154 | return fl; |
| 4155 | } |
| 4156 | |
Andrew Elble | 34ed987 | 2015-10-15 12:07:28 -0400 | [diff] [blame] | 4157 | /** |
| 4158 | * nfs4_setlease - Obtain a delegation by requesting lease from vfs layer |
| 4159 | * @dp: a pointer to the nfs4_delegation we're adding. |
| 4160 | * |
| 4161 | * Return: |
| 4162 | * On success: Return code will be 0 on success. |
| 4163 | * |
| 4164 | * On error: -EAGAIN if there was an existing delegation. |
| 4165 | * nonzero if there is an error in other cases. |
| 4166 | * |
| 4167 | */ |
| 4168 | |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4169 | static int nfs4_setlease(struct nfs4_delegation *dp) |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 4170 | { |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 4171 | struct nfs4_file *fp = dp->dl_stid.sc_file; |
Kinglong Mee | efde6b4 | 2015-07-13 17:33:24 +0800 | [diff] [blame] | 4172 | struct file_lock *fl; |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4173 | struct file *filp; |
| 4174 | int status = 0; |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 4175 | |
Jeff Layton | d564fbe | 2014-07-16 10:31:58 -0400 | [diff] [blame] | 4176 | fl = nfs4_alloc_init_lease(fp, NFS4_OPEN_DELEGATE_READ); |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 4177 | if (!fl) |
| 4178 | return -ENOMEM; |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4179 | filp = find_readable_file(fp); |
| 4180 | if (!filp) { |
| 4181 | /* We should always have a readable file here */ |
| 4182 | WARN_ON_ONCE(1); |
Kinglong Mee | af9dbaf | 2015-07-13 17:30:51 +0800 | [diff] [blame] | 4183 | locks_free_lock(fl); |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4184 | return -EBADF; |
| 4185 | } |
| 4186 | fl->fl_file = filp; |
Jeff Layton | e6f5c78 | 2014-08-22 10:40:25 -0400 | [diff] [blame] | 4187 | status = vfs_setlease(filp, fl->fl_type, &fl, NULL); |
Jeff Layton | 1c7dd2f | 2014-08-22 10:55:47 -0400 | [diff] [blame] | 4188 | if (fl) |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4189 | locks_free_lock(fl); |
Jeff Layton | 1c7dd2f | 2014-08-22 10:55:47 -0400 | [diff] [blame] | 4190 | if (status) |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4191 | goto out_fput; |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 4192 | spin_lock(&state_lock); |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4193 | spin_lock(&fp->fi_lock); |
| 4194 | /* Did the lease get broken before we took the lock? */ |
| 4195 | status = -EAGAIN; |
| 4196 | if (fp->fi_had_conflict) |
| 4197 | goto out_unlock; |
| 4198 | /* Race breaker */ |
Jeff Layton | 0c637be | 2014-08-22 12:05:43 -0400 | [diff] [blame] | 4199 | if (fp->fi_deleg_file) { |
Andrew Elble | 34ed987 | 2015-10-15 12:07:28 -0400 | [diff] [blame] | 4200 | status = hash_delegation_locked(dp, fp); |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4201 | goto out_unlock; |
| 4202 | } |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4203 | fp->fi_deleg_file = filp; |
Andrew Elble | 34ed987 | 2015-10-15 12:07:28 -0400 | [diff] [blame] | 4204 | fp->fi_delegees = 0; |
| 4205 | status = hash_delegation_locked(dp, fp); |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4206 | spin_unlock(&fp->fi_lock); |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 4207 | spin_unlock(&state_lock); |
Andrew Elble | 34ed987 | 2015-10-15 12:07:28 -0400 | [diff] [blame] | 4208 | if (status) { |
| 4209 | /* Should never happen, this is a new fi_deleg_file */ |
| 4210 | WARN_ON_ONCE(1); |
| 4211 | goto out_fput; |
| 4212 | } |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 4213 | return 0; |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4214 | out_unlock: |
| 4215 | spin_unlock(&fp->fi_lock); |
| 4216 | spin_unlock(&state_lock); |
| 4217 | out_fput: |
| 4218 | fput(filp); |
J. Bruce Fields | e873088 | 2012-01-23 13:52:01 -0500 | [diff] [blame] | 4219 | return status; |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 4220 | } |
| 4221 | |
Jeff Layton | 0b26693 | 2014-07-25 07:34:25 -0400 | [diff] [blame] | 4222 | static struct nfs4_delegation * |
| 4223 | nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 4224 | struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate) |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 4225 | { |
Jeff Layton | 0b26693 | 2014-07-25 07:34:25 -0400 | [diff] [blame] | 4226 | int status; |
| 4227 | struct nfs4_delegation *dp; |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4228 | |
J. Bruce Fields | bf7bd3e | 2013-08-15 16:55:26 -0400 | [diff] [blame] | 4229 | if (fp->fi_had_conflict) |
Jeff Layton | 0b26693 | 2014-07-25 07:34:25 -0400 | [diff] [blame] | 4230 | return ERR_PTR(-EAGAIN); |
| 4231 | |
Andrew Elble | 34ed987 | 2015-10-15 12:07:28 -0400 | [diff] [blame] | 4232 | spin_lock(&state_lock); |
| 4233 | spin_lock(&fp->fi_lock); |
| 4234 | status = nfs4_get_existing_delegation(clp, fp); |
| 4235 | spin_unlock(&fp->fi_lock); |
| 4236 | spin_unlock(&state_lock); |
| 4237 | |
| 4238 | if (status) |
| 4239 | return ERR_PTR(status); |
| 4240 | |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 4241 | dp = alloc_init_deleg(clp, fh, odstate); |
Jeff Layton | 0b26693 | 2014-07-25 07:34:25 -0400 | [diff] [blame] | 4242 | if (!dp) |
| 4243 | return ERR_PTR(-ENOMEM); |
| 4244 | |
J. Bruce Fields | bf7bd3e | 2013-08-15 16:55:26 -0400 | [diff] [blame] | 4245 | get_nfs4_file(fp); |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 4246 | spin_lock(&state_lock); |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4247 | spin_lock(&fp->fi_lock); |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 4248 | dp->dl_stid.sc_file = fp; |
Jeff Layton | 0c637be | 2014-08-22 12:05:43 -0400 | [diff] [blame] | 4249 | if (!fp->fi_deleg_file) { |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4250 | spin_unlock(&fp->fi_lock); |
| 4251 | spin_unlock(&state_lock); |
Jeff Layton | 0b26693 | 2014-07-25 07:34:25 -0400 | [diff] [blame] | 4252 | status = nfs4_setlease(dp); |
| 4253 | goto out; |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4254 | } |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 4255 | if (fp->fi_had_conflict) { |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4256 | status = -EAGAIN; |
| 4257 | goto out_unlock; |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 4258 | } |
Andrew Elble | 34ed987 | 2015-10-15 12:07:28 -0400 | [diff] [blame] | 4259 | status = hash_delegation_locked(dp, fp); |
Jeff Layton | 417c662 | 2014-07-21 09:34:57 -0400 | [diff] [blame] | 4260 | out_unlock: |
| 4261 | spin_unlock(&fp->fi_lock); |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 4262 | spin_unlock(&state_lock); |
Jeff Layton | 0b26693 | 2014-07-25 07:34:25 -0400 | [diff] [blame] | 4263 | out: |
| 4264 | if (status) { |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 4265 | put_clnt_odstate(dp->dl_clnt_odstate); |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 4266 | nfs4_put_stid(&dp->dl_stid); |
Jeff Layton | 0b26693 | 2014-07-25 07:34:25 -0400 | [diff] [blame] | 4267 | return ERR_PTR(status); |
| 4268 | } |
| 4269 | return dp; |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 4270 | } |
| 4271 | |
Benny Halevy | 4aa8913 | 2012-02-21 14:16:44 -0800 | [diff] [blame] | 4272 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
| 4273 | { |
| 4274 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; |
| 4275 | if (status == -EAGAIN) |
| 4276 | open->op_why_no_deleg = WND4_CONTENTION; |
| 4277 | else { |
| 4278 | open->op_why_no_deleg = WND4_RESOURCE; |
| 4279 | switch (open->op_deleg_want) { |
| 4280 | case NFS4_SHARE_WANT_READ_DELEG: |
| 4281 | case NFS4_SHARE_WANT_WRITE_DELEG: |
| 4282 | case NFS4_SHARE_WANT_ANY_DELEG: |
| 4283 | break; |
| 4284 | case NFS4_SHARE_WANT_CANCEL: |
| 4285 | open->op_why_no_deleg = WND4_CANCELLED; |
| 4286 | break; |
| 4287 | case NFS4_SHARE_WANT_NO_DELEG: |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 4288 | WARN_ON_ONCE(1); |
Benny Halevy | 4aa8913 | 2012-02-21 14:16:44 -0800 | [diff] [blame] | 4289 | } |
| 4290 | } |
| 4291 | } |
| 4292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4293 | /* |
| 4294 | * Attempt to hand out a delegation. |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4295 | * |
| 4296 | * Note we don't support write delegations, and won't until the vfs has |
| 4297 | * proper support for them. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4298 | */ |
| 4299 | static void |
Jeff Layton | 4cf5922 | 2014-07-25 07:34:24 -0400 | [diff] [blame] | 4300 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, |
| 4301 | struct nfs4_ol_stateid *stp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4302 | { |
| 4303 | struct nfs4_delegation *dp; |
Jeff Layton | 4cf5922 | 2014-07-25 07:34:24 -0400 | [diff] [blame] | 4304 | struct nfs4_openowner *oo = openowner(stp->st_stateowner); |
| 4305 | struct nfs4_client *clp = stp->st_stid.sc_client; |
J. Bruce Fields | 14a24e9 | 2010-12-10 19:02:49 -0500 | [diff] [blame] | 4306 | int cb_up; |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4307 | int status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4308 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4309 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 4310 | open->op_recall = 0; |
| 4311 | switch (open->op_claim_type) { |
| 4312 | case NFS4_OPEN_CLAIM_PREVIOUS: |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 4313 | if (!cb_up) |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 4314 | open->op_recall = 1; |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4315 | if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) |
| 4316 | goto out_no_deleg; |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 4317 | break; |
| 4318 | case NFS4_OPEN_CLAIM_NULL: |
Ming Chen | ed47b06 | 2014-01-09 21:26:10 +0000 | [diff] [blame] | 4319 | case NFS4_OPEN_CLAIM_FH: |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4320 | /* |
| 4321 | * Let's not give out any delegations till everyone's |
J. Bruce Fields | c87fb4a | 2015-08-06 12:47:02 -0400 | [diff] [blame] | 4322 | * had the chance to reclaim theirs, *and* until |
| 4323 | * NLM locks have all been reclaimed: |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4324 | */ |
Jeff Layton | 4cf5922 | 2014-07-25 07:34:24 -0400 | [diff] [blame] | 4325 | if (locks_in_grace(clp->net)) |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4326 | goto out_no_deleg; |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 4327 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4328 | goto out_no_deleg; |
Steve Dickson | 9a0590a | 2013-05-15 14:51:49 -0400 | [diff] [blame] | 4329 | /* |
| 4330 | * Also, if the file was opened for write or |
| 4331 | * create, there's a good chance the client's |
| 4332 | * about to write to it, resulting in an |
| 4333 | * immediate recall (since we don't support |
| 4334 | * write delegations): |
| 4335 | */ |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 4336 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4337 | goto out_no_deleg; |
| 4338 | if (open->op_create == NFS4_OPEN_CREATE) |
| 4339 | goto out_no_deleg; |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 4340 | break; |
| 4341 | default: |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4342 | goto out_no_deleg; |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 4343 | } |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 4344 | dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate); |
Jeff Layton | 0b26693 | 2014-07-25 07:34:25 -0400 | [diff] [blame] | 4345 | if (IS_ERR(dp)) |
J. Bruce Fields | dd239cc | 2011-01-31 17:14:55 -0500 | [diff] [blame] | 4346 | goto out_no_deleg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4347 | |
J. Bruce Fields | d5477a8 | 2011-09-08 12:07:44 -0400 | [diff] [blame] | 4348 | memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4349 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 4350 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
J. Bruce Fields | d5477a8 | 2011-09-08 12:07:44 -0400 | [diff] [blame] | 4351 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4352 | open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; |
Trond Myklebust | 67cb127 | 2014-07-29 21:34:17 -0400 | [diff] [blame] | 4353 | nfs4_put_stid(&dp->dl_stid); |
J. Bruce Fields | dd239cc | 2011-01-31 17:14:55 -0500 | [diff] [blame] | 4354 | return; |
J. Bruce Fields | dd239cc | 2011-01-31 17:14:55 -0500 | [diff] [blame] | 4355 | out_no_deleg: |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4356 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; |
| 4357 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && |
J. Bruce Fields | d08d32e | 2013-06-21 11:05:32 -0400 | [diff] [blame] | 4358 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4359 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
J. Bruce Fields | d08d32e | 2013-06-21 11:05:32 -0400 | [diff] [blame] | 4360 | open->op_recall = 1; |
| 4361 | } |
J. Bruce Fields | 99c4151 | 2013-05-21 16:21:25 -0400 | [diff] [blame] | 4362 | |
| 4363 | /* 4.1 client asking for a delegation? */ |
| 4364 | if (open->op_deleg_want) |
| 4365 | nfsd4_open_deleg_none_ext(open, status); |
| 4366 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4367 | } |
| 4368 | |
Benny Halevy | e27f49c | 2012-02-21 14:16:54 -0800 | [diff] [blame] | 4369 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
| 4370 | struct nfs4_delegation *dp) |
| 4371 | { |
| 4372 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && |
| 4373 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { |
| 4374 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; |
| 4375 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; |
| 4376 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && |
| 4377 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { |
| 4378 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; |
| 4379 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; |
| 4380 | } |
| 4381 | /* Otherwise the client must be confused wanting a delegation |
| 4382 | * it already has, therefore we don't return |
| 4383 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. |
| 4384 | */ |
| 4385 | } |
| 4386 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4387 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4388 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
| 4389 | { |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 4390 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 4391 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4392 | struct nfs4_file *fp = NULL; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4393 | struct nfs4_ol_stateid *stp = NULL; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 4394 | struct nfs4_delegation *dp = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4395 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4397 | /* |
| 4398 | * Lookup file; if found, lookup stateid and check open request, |
| 4399 | * and check for delegations in the process of being recalled. |
| 4400 | * If not found, create the nfs4_file struct |
| 4401 | */ |
Jeff Layton | f9c00c3 | 2014-07-23 16:17:41 -0400 | [diff] [blame] | 4402 | fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); |
Trond Myklebust | 950e011 | 2014-06-30 11:48:31 -0400 | [diff] [blame] | 4403 | if (fp != open->op_file) { |
J. Bruce Fields | 41d2266 | 2013-03-21 15:49:47 -0400 | [diff] [blame] | 4404 | status = nfs4_check_deleg(cl, open, &dp); |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 4405 | if (status) |
| 4406 | goto out; |
Andrew Elble | 7fc0564 | 2015-11-05 20:42:43 -0500 | [diff] [blame] | 4407 | spin_lock(&fp->fi_lock); |
Jeff Layton | a46cb7f | 2014-07-10 14:07:35 -0400 | [diff] [blame] | 4408 | stp = nfsd4_find_existing_open(fp, open); |
Andrew Elble | 7fc0564 | 2015-11-05 20:42:43 -0500 | [diff] [blame] | 4409 | spin_unlock(&fp->fi_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4410 | } else { |
Trond Myklebust | 950e011 | 2014-06-30 11:48:31 -0400 | [diff] [blame] | 4411 | open->op_file = NULL; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 4412 | status = nfserr_bad_stateid; |
J. Bruce Fields | 8b289b2 | 2011-10-19 11:52:12 -0400 | [diff] [blame] | 4413 | if (nfsd4_is_deleg_cur(open)) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 4414 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4415 | } |
| 4416 | |
| 4417 | /* |
| 4418 | * OPEN the file, or upgrade an existing OPEN. |
| 4419 | * If truncate fails, the OPEN fails. |
| 4420 | */ |
| 4421 | if (stp) { |
| 4422 | /* Stateid was found, this is an OPEN upgrade */ |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 4423 | mutex_lock(&stp->st_mutex); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 4424 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
Jeff Layton | 35a92fe | 2015-09-17 07:47:08 -0400 | [diff] [blame] | 4425 | if (status) { |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 4426 | mutex_unlock(&stp->st_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4427 | goto out; |
Jeff Layton | 35a92fe | 2015-09-17 07:47:08 -0400 | [diff] [blame] | 4428 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4429 | } else { |
Oleg Drokin | 8c7245ab | 2016-06-14 23:28:06 -0400 | [diff] [blame] | 4430 | /* stp is returned locked. */ |
| 4431 | stp = init_open_stateid(fp, open); |
| 4432 | /* See if we lost the race to some other thread */ |
| 4433 | if (stp->st_access_bmap != 0) { |
Andrew Elble | 7fc0564 | 2015-11-05 20:42:43 -0500 | [diff] [blame] | 4434 | status = nfs4_upgrade_open(rqstp, fp, current_fh, |
| 4435 | stp, open); |
| 4436 | if (status) { |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 4437 | mutex_unlock(&stp->st_mutex); |
Andrew Elble | 7fc0564 | 2015-11-05 20:42:43 -0500 | [diff] [blame] | 4438 | goto out; |
| 4439 | } |
| 4440 | goto upgrade_out; |
| 4441 | } |
Jeff Layton | 6eb3a1d | 2014-07-10 14:07:31 -0400 | [diff] [blame] | 4442 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); |
| 4443 | if (status) { |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 4444 | mutex_unlock(&stp->st_mutex); |
Jeff Layton | 6eb3a1d | 2014-07-10 14:07:31 -0400 | [diff] [blame] | 4445 | release_open_stateid(stp); |
| 4446 | goto out; |
| 4447 | } |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 4448 | |
| 4449 | stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, |
| 4450 | open->op_odstate); |
| 4451 | if (stp->st_clnt_odstate == open->op_odstate) |
| 4452 | open->op_odstate = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4453 | } |
Andrew Elble | 7fc0564 | 2015-11-05 20:42:43 -0500 | [diff] [blame] | 4454 | upgrade_out: |
Jeff Layton | 9767feb | 2015-10-01 09:05:50 -0400 | [diff] [blame] | 4455 | nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 4456 | mutex_unlock(&stp->st_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4457 | |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 4458 | if (nfsd4_has_session(&resp->cstate)) { |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 4459 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
| 4460 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; |
| 4461 | open->op_why_no_deleg = WND4_NOT_WANTED; |
| 4462 | goto nodeleg; |
| 4463 | } |
| 4464 | } |
| 4465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4466 | /* |
| 4467 | * Attempt to hand out a delegation. No error return, because the |
| 4468 | * OPEN succeeds even if we fail. |
| 4469 | */ |
Jeff Layton | 4cf5922 | 2014-07-25 07:34:24 -0400 | [diff] [blame] | 4470 | nfs4_open_delegation(current_fh, open, stp); |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 4471 | nodeleg: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4472 | status = nfs_ok; |
| 4473 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 4474 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4475 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4476 | out: |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 4477 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
| 4478 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && |
Benny Halevy | e27f49c | 2012-02-21 14:16:54 -0800 | [diff] [blame] | 4479 | open->op_deleg_want) |
| 4480 | nfsd4_deleg_xgrade_none_ext(open, dp); |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 4481 | |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 4482 | if (fp) |
| 4483 | put_nfs4_file(fp); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 4484 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
Kinglong Mee | 8718602 | 2015-07-13 17:32:59 +0800 | [diff] [blame] | 4485 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4486 | /* |
| 4487 | * To finish the open response, we just need to set the rflags. |
| 4488 | */ |
| 4489 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; |
Jeff Layton | 19e4c34 | 2016-09-16 16:28:27 -0400 | [diff] [blame] | 4490 | if (nfsd4_has_session(&resp->cstate)) |
| 4491 | open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK; |
| 4492 | else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4493 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
Jeff Layton | 19e4c34 | 2016-09-16 16:28:27 -0400 | [diff] [blame] | 4494 | |
Trond Myklebust | dcd94cc | 2014-07-29 21:34:18 -0400 | [diff] [blame] | 4495 | if (dp) |
| 4496 | nfs4_put_stid(&dp->dl_stid); |
Trond Myklebust | d6f2bc5 | 2014-07-29 21:34:19 -0400 | [diff] [blame] | 4497 | if (stp) |
| 4498 | nfs4_put_stid(&stp->st_stid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4499 | |
| 4500 | return status; |
| 4501 | } |
| 4502 | |
Jeff Layton | 58fb12e | 2014-07-29 21:34:27 -0400 | [diff] [blame] | 4503 | void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, |
Jeff Layton | 4229789 | 2015-03-23 10:53:44 -0400 | [diff] [blame] | 4504 | struct nfsd4_open *open) |
J. Bruce Fields | d29b20c | 2011-10-13 15:12:59 -0400 | [diff] [blame] | 4505 | { |
| 4506 | if (open->op_openowner) { |
Jeff Layton | d3134b1 | 2014-07-29 21:34:32 -0400 | [diff] [blame] | 4507 | struct nfs4_stateowner *so = &open->op_openowner->oo_owner; |
J. Bruce Fields | d29b20c | 2011-10-13 15:12:59 -0400 | [diff] [blame] | 4508 | |
Jeff Layton | d3134b1 | 2014-07-29 21:34:32 -0400 | [diff] [blame] | 4509 | nfsd4_cstate_assign_replay(cstate, so); |
| 4510 | nfs4_put_stateowner(so); |
J. Bruce Fields | d29b20c | 2011-10-13 15:12:59 -0400 | [diff] [blame] | 4511 | } |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 4512 | if (open->op_file) |
Jeff Layton | 5b095e9 | 2014-10-23 08:01:02 -0400 | [diff] [blame] | 4513 | kmem_cache_free(file_slab, open->op_file); |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 4514 | if (open->op_stp) |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 4515 | nfs4_put_stid(&open->op_stp->st_stid); |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 4516 | if (open->op_odstate) |
| 4517 | kmem_cache_free(odstate_slab, open->op_odstate); |
J. Bruce Fields | d29b20c | 2011-10-13 15:12:59 -0400 | [diff] [blame] | 4518 | } |
| 4519 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4520 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 4521 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 4522 | clientid_t *clid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4523 | { |
| 4524 | struct nfs4_client *clp; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4525 | __be32 status; |
Stanislav Kinsbursky | 7f2210f | 2012-11-14 18:21:05 +0300 | [diff] [blame] | 4526 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4527 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4528 | dprintk("process_renew(%08x/%08x): starting\n", |
| 4529 | clid->cl_boot, clid->cl_id); |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 4530 | status = lookup_clientid(clid, cstate, nn); |
J. Bruce Fields | 9b2ef62 | 2012-12-03 17:24:41 -0500 | [diff] [blame] | 4531 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4532 | goto out; |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 4533 | clp = cstate->clp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4534 | status = nfserr_cb_path_down; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 4535 | if (!list_empty(&clp->cl_delegations) |
J. Bruce Fields | 77a3569 | 2010-04-30 18:51:44 -0400 | [diff] [blame] | 4536 | && clp->cl_cb_state != NFSD4_CB_UP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4537 | goto out; |
| 4538 | status = nfs_ok; |
| 4539 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4540 | return status; |
| 4541 | } |
| 4542 | |
Jeff Layton | 7f5ef2e | 2014-09-12 16:40:21 -0400 | [diff] [blame] | 4543 | void |
Stanislav Kinsbursky | 12760c6 | 2012-11-14 18:22:12 +0300 | [diff] [blame] | 4544 | nfsd4_end_grace(struct nfsd_net *nn) |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 4545 | { |
Jeff Layton | 33dcc48 | 2012-04-10 11:08:48 -0400 | [diff] [blame] | 4546 | /* do nothing if grace period already ended */ |
Stanislav Kinsbursky | a51c84e | 2012-07-25 16:57:37 +0400 | [diff] [blame] | 4547 | if (nn->grace_ended) |
Jeff Layton | 33dcc48 | 2012-04-10 11:08:48 -0400 | [diff] [blame] | 4548 | return; |
| 4549 | |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 4550 | dprintk("NFSD: end of grace period\n"); |
Stanislav Kinsbursky | a51c84e | 2012-07-25 16:57:37 +0400 | [diff] [blame] | 4551 | nn->grace_ended = true; |
J. Bruce Fields | 70b2823 | 2014-09-16 17:37:32 -0400 | [diff] [blame] | 4552 | /* |
| 4553 | * If the server goes down again right now, an NFSv4 |
| 4554 | * client will still be allowed to reclaim after it comes back up, |
| 4555 | * even if it hasn't yet had a chance to reclaim state this time. |
| 4556 | * |
| 4557 | */ |
Jeff Layton | 919b804 | 2014-09-12 16:40:20 -0400 | [diff] [blame] | 4558 | nfsd4_record_grace_done(nn); |
J. Bruce Fields | 70b2823 | 2014-09-16 17:37:32 -0400 | [diff] [blame] | 4559 | /* |
| 4560 | * At this point, NFSv4 clients can still reclaim. But if the |
| 4561 | * server crashes, any that have not yet reclaimed will be out |
| 4562 | * of luck on the next boot. |
| 4563 | * |
| 4564 | * (NFSv4.1+ clients are considered to have reclaimed once they |
| 4565 | * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to |
| 4566 | * have reclaimed after their first OPEN.) |
| 4567 | */ |
Stanislav Kinsbursky | 5e1533c | 2012-07-25 16:56:58 +0400 | [diff] [blame] | 4568 | locks_end_grace(&nn->nfsd4_manager); |
J. Bruce Fields | 70b2823 | 2014-09-16 17:37:32 -0400 | [diff] [blame] | 4569 | /* |
| 4570 | * At this point, and once lockd and/or any other containers |
| 4571 | * exit their grace period, further reclaims will fail and |
| 4572 | * regular locking can resume. |
| 4573 | */ |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 4574 | } |
| 4575 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 4576 | static time_t |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 4577 | nfs4_laundromat(struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4578 | { |
| 4579 | struct nfs4_client *clp; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4580 | struct nfs4_openowner *oo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4581 | struct nfs4_delegation *dp; |
Jeff Layton | 217526e | 2014-07-30 08:27:11 -0400 | [diff] [blame] | 4582 | struct nfs4_ol_stateid *stp; |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 4583 | struct nfsd4_blocked_lock *nbl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4584 | struct list_head *pos, *next, reaplist; |
Stanislav Kinsbursky | 3d73371 | 2012-11-27 14:11:44 +0300 | [diff] [blame] | 4585 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
Jeff Layton | a832e7a | 2014-05-30 09:09:26 -0400 | [diff] [blame] | 4586 | time_t t, new_timeo = nn->nfsd4_lease; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4587 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4588 | dprintk("NFSD: laundromat service - starting\n"); |
Stanislav Kinsbursky | 12760c6 | 2012-11-14 18:22:12 +0300 | [diff] [blame] | 4589 | nfsd4_end_grace(nn); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 4590 | INIT_LIST_HEAD(&reaplist); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 4591 | spin_lock(&nn->client_lock); |
Stanislav Kinsbursky | 5ed58bb | 2012-11-14 18:21:56 +0300 | [diff] [blame] | 4592 | list_for_each_safe(pos, next, &nn->client_lru) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4593 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
| 4594 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { |
| 4595 | t = clp->cl_time - cutoff; |
Jeff Layton | a832e7a | 2014-05-30 09:09:26 -0400 | [diff] [blame] | 4596 | new_timeo = min(new_timeo, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4597 | break; |
| 4598 | } |
J. Bruce Fields | 221a687 | 2013-04-01 22:23:49 -0400 | [diff] [blame] | 4599 | if (mark_client_expired_locked(clp)) { |
Benny Halevy | d768298 | 2010-05-12 00:13:54 +0300 | [diff] [blame] | 4600 | dprintk("NFSD: client in use (clientid %08x)\n", |
| 4601 | clp->cl_clientid.cl_id); |
| 4602 | continue; |
| 4603 | } |
Trond Myklebust | 4864af9 | 2014-07-30 08:27:03 -0400 | [diff] [blame] | 4604 | list_add(&clp->cl_lru, &reaplist); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 4605 | } |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 4606 | spin_unlock(&nn->client_lock); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 4607 | list_for_each_safe(pos, next, &reaplist) { |
| 4608 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4609 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
| 4610 | clp->cl_clientid.cl_id); |
Trond Myklebust | 4864af9 | 2014-07-30 08:27:03 -0400 | [diff] [blame] | 4611 | list_del_init(&clp->cl_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4612 | expire_client(clp); |
| 4613 | } |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 4614 | spin_lock(&state_lock); |
J. Bruce Fields | e8c69d1 | 2013-03-21 15:19:33 -0400 | [diff] [blame] | 4615 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4616 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 4617 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
Jeff Layton | a832e7a | 2014-05-30 09:09:26 -0400 | [diff] [blame] | 4618 | t = dp->dl_time - cutoff; |
| 4619 | new_timeo = min(new_timeo, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4620 | break; |
| 4621 | } |
Jeff Layton | 3fcbbd2 | 2015-08-24 12:41:48 -0400 | [diff] [blame] | 4622 | WARN_ON(!unhash_delegation_locked(dp)); |
Jeff Layton | 4269067 | 2014-07-25 07:34:20 -0400 | [diff] [blame] | 4623 | list_add(&dp->dl_recall_lru, &reaplist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4624 | } |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 4625 | spin_unlock(&state_lock); |
Jeff Layton | 2d4a532 | 2014-07-25 07:34:21 -0400 | [diff] [blame] | 4626 | while (!list_empty(&reaplist)) { |
| 4627 | dp = list_first_entry(&reaplist, struct nfs4_delegation, |
| 4628 | dl_recall_lru); |
| 4629 | list_del_init(&dp->dl_recall_lru); |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 4630 | revoke_delegation(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4631 | } |
Jeff Layton | 217526e | 2014-07-30 08:27:11 -0400 | [diff] [blame] | 4632 | |
| 4633 | spin_lock(&nn->client_lock); |
| 4634 | while (!list_empty(&nn->close_lru)) { |
| 4635 | oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, |
| 4636 | oo_close_lru); |
| 4637 | if (time_after((unsigned long)oo->oo_time, |
| 4638 | (unsigned long)cutoff)) { |
Jeff Layton | a832e7a | 2014-05-30 09:09:26 -0400 | [diff] [blame] | 4639 | t = oo->oo_time - cutoff; |
| 4640 | new_timeo = min(new_timeo, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4641 | break; |
| 4642 | } |
Jeff Layton | 217526e | 2014-07-30 08:27:11 -0400 | [diff] [blame] | 4643 | list_del_init(&oo->oo_close_lru); |
| 4644 | stp = oo->oo_last_closed_stid; |
| 4645 | oo->oo_last_closed_stid = NULL; |
| 4646 | spin_unlock(&nn->client_lock); |
| 4647 | nfs4_put_stid(&stp->st_stid); |
| 4648 | spin_lock(&nn->client_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4649 | } |
Jeff Layton | 217526e | 2014-07-30 08:27:11 -0400 | [diff] [blame] | 4650 | spin_unlock(&nn->client_lock); |
| 4651 | |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 4652 | /* |
| 4653 | * It's possible for a client to try and acquire an already held lock |
| 4654 | * that is being held for a long time, and then lose interest in it. |
| 4655 | * So, we clean out any un-revisited request after a lease period |
| 4656 | * under the assumption that the client is no longer interested. |
| 4657 | * |
| 4658 | * RFC5661, sec. 9.6 states that the client must not rely on getting |
| 4659 | * notifications and must continue to poll for locks, even when the |
| 4660 | * server supports them. Thus this shouldn't lead to clients blocking |
| 4661 | * indefinitely once the lock does become free. |
| 4662 | */ |
| 4663 | BUG_ON(!list_empty(&reaplist)); |
Jeff Layton | 0cc11a6 | 2016-10-20 09:34:31 -0400 | [diff] [blame] | 4664 | spin_lock(&nn->blocked_locks_lock); |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 4665 | while (!list_empty(&nn->blocked_locks_lru)) { |
| 4666 | nbl = list_first_entry(&nn->blocked_locks_lru, |
| 4667 | struct nfsd4_blocked_lock, nbl_lru); |
| 4668 | if (time_after((unsigned long)nbl->nbl_time, |
| 4669 | (unsigned long)cutoff)) { |
| 4670 | t = nbl->nbl_time - cutoff; |
| 4671 | new_timeo = min(new_timeo, t); |
| 4672 | break; |
| 4673 | } |
| 4674 | list_move(&nbl->nbl_lru, &reaplist); |
| 4675 | list_del_init(&nbl->nbl_list); |
| 4676 | } |
Jeff Layton | 0cc11a6 | 2016-10-20 09:34:31 -0400 | [diff] [blame] | 4677 | spin_unlock(&nn->blocked_locks_lock); |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 4678 | |
| 4679 | while (!list_empty(&reaplist)) { |
| 4680 | nbl = list_first_entry(&nn->blocked_locks_lru, |
| 4681 | struct nfsd4_blocked_lock, nbl_lru); |
| 4682 | list_del_init(&nbl->nbl_lru); |
| 4683 | posix_unblock_lock(&nbl->nbl_lock); |
| 4684 | free_blocked_lock(nbl); |
| 4685 | } |
| 4686 | |
Jeff Layton | a832e7a | 2014-05-30 09:09:26 -0400 | [diff] [blame] | 4687 | new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); |
Jeff Layton | a832e7a | 2014-05-30 09:09:26 -0400 | [diff] [blame] | 4688 | return new_timeo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4689 | } |
| 4690 | |
Harvey Harrison | a254b24 | 2008-02-20 12:49:00 -0800 | [diff] [blame] | 4691 | static struct workqueue_struct *laundry_wq; |
| 4692 | static void laundromat_main(struct work_struct *); |
Harvey Harrison | a254b24 | 2008-02-20 12:49:00 -0800 | [diff] [blame] | 4693 | |
| 4694 | static void |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 4695 | laundromat_main(struct work_struct *laundry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4696 | { |
| 4697 | time_t t; |
Geliang Tang | 2e55f3a | 2016-01-01 22:06:28 +0800 | [diff] [blame] | 4698 | struct delayed_work *dwork = to_delayed_work(laundry); |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 4699 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, |
| 4700 | laundromat_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4701 | |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 4702 | t = nfs4_laundromat(nn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4703 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 4704 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4705 | } |
| 4706 | |
Jeff Layton | 8fcd461 | 2015-07-30 06:57:46 -0400 | [diff] [blame] | 4707 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 4708 | { |
Jeff Layton | 8fcd461 | 2015-07-30 06:57:46 -0400 | [diff] [blame] | 4709 | if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 4710 | return nfserr_bad_stateid; |
| 4711 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4712 | } |
| 4713 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4714 | static inline int |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 4715 | access_permit_read(struct nfs4_ol_stateid *stp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4716 | { |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 4717 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
| 4718 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || |
| 4719 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4720 | } |
| 4721 | |
| 4722 | static inline int |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 4723 | access_permit_write(struct nfs4_ol_stateid *stp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4724 | { |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 4725 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
| 4726 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4727 | } |
| 4728 | |
| 4729 | static |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4730 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4731 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4732 | __be32 status = nfserr_openmode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4733 | |
J. Bruce Fields | 0292191 | 2010-07-29 15:16:59 -0400 | [diff] [blame] | 4734 | /* For lock stateid's, we test the parent open, not the lock: */ |
| 4735 | if (stp->st_openstp) |
| 4736 | stp = stp->st_openstp; |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 4737 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4738 | goto out; |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 4739 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4740 | goto out; |
| 4741 | status = nfs_ok; |
| 4742 | out: |
| 4743 | return status; |
| 4744 | } |
| 4745 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4746 | static inline __be32 |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 4747 | check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4748 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 4749 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4750 | return nfs_ok; |
J. Bruce Fields | c87fb4a | 2015-08-06 12:47:02 -0400 | [diff] [blame] | 4751 | else if (opens_in_grace(net)) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 4752 | /* Answer in remaining cases depends on existence of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4753 | * conflicting state; so we must wait out the grace period. */ |
| 4754 | return nfserr_grace; |
| 4755 | } else if (flags & WR_STATE) |
| 4756 | return nfs4_share_conflict(current_fh, |
| 4757 | NFS4_SHARE_DENY_WRITE); |
| 4758 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ |
| 4759 | return nfs4_share_conflict(current_fh, |
| 4760 | NFS4_SHARE_DENY_READ); |
| 4761 | } |
| 4762 | |
| 4763 | /* |
| 4764 | * Allow READ/WRITE during grace period on recovered state only for files |
| 4765 | * that are not able to provide mandatory locking. |
| 4766 | */ |
| 4767 | static inline int |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 4768 | grace_disallows_io(struct net *net, struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4769 | { |
J. Bruce Fields | c87fb4a | 2015-08-06 12:47:02 -0400 | [diff] [blame] | 4770 | return opens_in_grace(net) && mandatory_lock(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4771 | } |
| 4772 | |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 4773 | static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 4774 | { |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 4775 | /* |
| 4776 | * When sessions are used the stateid generation number is ignored |
| 4777 | * when it is zero. |
| 4778 | */ |
J. Bruce Fields | 28dde24 | 2011-08-22 10:07:12 -0400 | [diff] [blame] | 4779 | if (has_session && in->si_generation == 0) |
J. Bruce Fields | 81b8296 | 2011-08-23 11:03:29 -0400 | [diff] [blame] | 4780 | return nfs_ok; |
| 4781 | |
| 4782 | if (in->si_generation == ref->si_generation) |
| 4783 | return nfs_ok; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 4784 | |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 4785 | /* If the client sends us a stateid from the future, it's buggy: */ |
Jeff Layton | 14b7f4a | 2016-05-05 06:53:47 -0400 | [diff] [blame] | 4786 | if (nfsd4_stateid_generation_after(in, ref)) |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 4787 | return nfserr_bad_stateid; |
| 4788 | /* |
J. Bruce Fields | 81b8296 | 2011-08-23 11:03:29 -0400 | [diff] [blame] | 4789 | * However, we could see a stateid from the past, even from a |
| 4790 | * non-buggy client. For example, if the client sends a lock |
| 4791 | * while some IO is outstanding, the lock may bump si_generation |
| 4792 | * while the IO is still in flight. The client could avoid that |
| 4793 | * situation by waiting for responses on all the IO requests, |
| 4794 | * but better performance may result in retrying IO that |
| 4795 | * receives an old_stateid error if requests are rarely |
| 4796 | * reordered in flight: |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 4797 | */ |
J. Bruce Fields | 81b8296 | 2011-08-23 11:03:29 -0400 | [diff] [blame] | 4798 | return nfserr_old_stateid; |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 4799 | } |
| 4800 | |
Christoph Hellwig | ebe9cb3 | 2015-04-28 15:41:15 +0200 | [diff] [blame] | 4801 | static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) |
| 4802 | { |
| 4803 | if (ols->st_stateowner->so_is_open_owner && |
| 4804 | !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
| 4805 | return nfserr_bad_stateid; |
| 4806 | return nfs_ok; |
| 4807 | } |
| 4808 | |
Chuck Lever | 7df302f | 2012-05-29 13:56:37 -0400 | [diff] [blame] | 4809 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 4810 | { |
J. Bruce Fields | 97b7e3b | 2011-09-09 11:26:58 -0400 | [diff] [blame] | 4811 | struct nfs4_stid *s; |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 4812 | __be32 status = nfserr_bad_stateid; |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 4813 | |
Chuck Lever | 7df302f | 2012-05-29 13:56:37 -0400 | [diff] [blame] | 4814 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 4815 | return status; |
Chuck Lever | 7df302f | 2012-05-29 13:56:37 -0400 | [diff] [blame] | 4816 | /* Client debugging aid. */ |
| 4817 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { |
| 4818 | char addr_str[INET6_ADDRSTRLEN]; |
| 4819 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, |
| 4820 | sizeof(addr_str)); |
| 4821 | pr_warn_ratelimited("NFSD: client %s testing state ID " |
| 4822 | "with incorrect client ID\n", addr_str); |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 4823 | return status; |
Chuck Lever | 7df302f | 2012-05-29 13:56:37 -0400 | [diff] [blame] | 4824 | } |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 4825 | spin_lock(&cl->cl_lock); |
| 4826 | s = find_stateid_locked(cl, stateid); |
J. Bruce Fields | 97b7e3b | 2011-09-09 11:26:58 -0400 | [diff] [blame] | 4827 | if (!s) |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 4828 | goto out_unlock; |
J. Bruce Fields | 36279ac | 2011-09-26 12:53:00 -0400 | [diff] [blame] | 4829 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 4830 | if (status) |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 4831 | goto out_unlock; |
J. Bruce Fields | 2334003 | 2013-04-09 17:42:28 -0400 | [diff] [blame] | 4832 | switch (s->sc_type) { |
| 4833 | case NFS4_DELEG_STID: |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 4834 | status = nfs_ok; |
| 4835 | break; |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 4836 | case NFS4_REVOKED_DELEG_STID: |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 4837 | status = nfserr_deleg_revoked; |
| 4838 | break; |
J. Bruce Fields | 2334003 | 2013-04-09 17:42:28 -0400 | [diff] [blame] | 4839 | case NFS4_OPEN_STID: |
| 4840 | case NFS4_LOCK_STID: |
Christoph Hellwig | ebe9cb3 | 2015-04-28 15:41:15 +0200 | [diff] [blame] | 4841 | status = nfsd4_check_openowner_confirmed(openlockstateid(s)); |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 4842 | break; |
J. Bruce Fields | 2334003 | 2013-04-09 17:42:28 -0400 | [diff] [blame] | 4843 | default: |
| 4844 | printk("unknown stateid type %x\n", s->sc_type); |
Trond Myklebust | b0fc29d | 2014-07-16 10:31:59 -0400 | [diff] [blame] | 4845 | /* Fallthrough */ |
J. Bruce Fields | 2334003 | 2013-04-09 17:42:28 -0400 | [diff] [blame] | 4846 | case NFS4_CLOSED_STID: |
Trond Myklebust | b0fc29d | 2014-07-16 10:31:59 -0400 | [diff] [blame] | 4847 | case NFS4_CLOSED_DELEG_STID: |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 4848 | status = nfserr_bad_stateid; |
J. Bruce Fields | 2334003 | 2013-04-09 17:42:28 -0400 | [diff] [blame] | 4849 | } |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 4850 | out_unlock: |
| 4851 | spin_unlock(&cl->cl_lock); |
| 4852 | return status; |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 4853 | } |
| 4854 | |
Christoph Hellwig | cd61c52 | 2014-08-14 08:44:57 +0200 | [diff] [blame] | 4855 | __be32 |
Trond Myklebust | 2dd6e45 | 2014-06-30 11:48:43 -0400 | [diff] [blame] | 4856 | nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, |
| 4857 | stateid_t *stateid, unsigned char typemask, |
| 4858 | struct nfs4_stid **s, struct nfsd_net *nn) |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 4859 | { |
J. Bruce Fields | 0eb6f20 | 2013-03-12 17:36:17 -0400 | [diff] [blame] | 4860 | __be32 status; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 4861 | |
| 4862 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 4863 | return nfserr_bad_stateid; |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 4864 | status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); |
Trond Myklebust | a8a7c67 | 2014-03-29 14:43:38 -0400 | [diff] [blame] | 4865 | if (status == nfserr_stale_clientid) { |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 4866 | if (cstate->session) |
Trond Myklebust | a8a7c67 | 2014-03-29 14:43:38 -0400 | [diff] [blame] | 4867 | return nfserr_bad_stateid; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 4868 | return nfserr_stale_stateid; |
Trond Myklebust | a8a7c67 | 2014-03-29 14:43:38 -0400 | [diff] [blame] | 4869 | } |
J. Bruce Fields | 0eb6f20 | 2013-03-12 17:36:17 -0400 | [diff] [blame] | 4870 | if (status) |
| 4871 | return status; |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 4872 | *s = find_stateid_by_type(cstate->clp, stateid, typemask); |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 4873 | if (!*s) |
| 4874 | return nfserr_bad_stateid; |
| 4875 | return nfs_ok; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 4876 | } |
| 4877 | |
Christoph Hellwig | a0649b2 | 2015-06-18 16:44:59 +0200 | [diff] [blame] | 4878 | static struct file * |
| 4879 | nfs4_find_file(struct nfs4_stid *s, int flags) |
| 4880 | { |
Christoph Hellwig | af90f70 | 2015-06-18 16:45:00 +0200 | [diff] [blame] | 4881 | if (!s) |
| 4882 | return NULL; |
| 4883 | |
Christoph Hellwig | a0649b2 | 2015-06-18 16:44:59 +0200 | [diff] [blame] | 4884 | switch (s->sc_type) { |
| 4885 | case NFS4_DELEG_STID: |
| 4886 | if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) |
| 4887 | return NULL; |
| 4888 | return get_file(s->sc_file->fi_deleg_file); |
| 4889 | case NFS4_OPEN_STID: |
| 4890 | case NFS4_LOCK_STID: |
| 4891 | if (flags & RD_STATE) |
| 4892 | return find_readable_file(s->sc_file); |
| 4893 | else |
| 4894 | return find_writeable_file(s->sc_file); |
| 4895 | break; |
| 4896 | } |
| 4897 | |
| 4898 | return NULL; |
| 4899 | } |
| 4900 | |
| 4901 | static __be32 |
| 4902 | nfs4_check_olstateid(struct svc_fh *fhp, struct nfs4_ol_stateid *ols, int flags) |
| 4903 | { |
| 4904 | __be32 status; |
| 4905 | |
Christoph Hellwig | a0649b2 | 2015-06-18 16:44:59 +0200 | [diff] [blame] | 4906 | status = nfsd4_check_openowner_confirmed(ols); |
| 4907 | if (status) |
| 4908 | return status; |
| 4909 | return nfs4_check_openmode(ols, flags); |
| 4910 | } |
| 4911 | |
Christoph Hellwig | af90f70 | 2015-06-18 16:45:00 +0200 | [diff] [blame] | 4912 | static __be32 |
| 4913 | nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, |
| 4914 | struct file **filpp, bool *tmp_file, int flags) |
| 4915 | { |
| 4916 | int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; |
| 4917 | struct file *file; |
| 4918 | __be32 status; |
| 4919 | |
| 4920 | file = nfs4_find_file(s, flags); |
| 4921 | if (file) { |
| 4922 | status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, |
| 4923 | acc | NFSD_MAY_OWNER_OVERRIDE); |
| 4924 | if (status) { |
| 4925 | fput(file); |
| 4926 | return status; |
| 4927 | } |
| 4928 | |
| 4929 | *filpp = file; |
| 4930 | } else { |
| 4931 | status = nfsd_open(rqstp, fhp, S_IFREG, acc, filpp); |
| 4932 | if (status) |
| 4933 | return status; |
| 4934 | |
| 4935 | if (tmp_file) |
| 4936 | *tmp_file = true; |
| 4937 | } |
| 4938 | |
| 4939 | return 0; |
| 4940 | } |
| 4941 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4942 | /* |
Christoph Hellwig | a0649b2 | 2015-06-18 16:44:59 +0200 | [diff] [blame] | 4943 | * Checks for stateid operations |
| 4944 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4945 | __be32 |
Christoph Hellwig | af90f70 | 2015-06-18 16:45:00 +0200 | [diff] [blame] | 4946 | nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, |
Anna Schumaker | aa0d6ae | 2015-12-03 12:59:51 +0100 | [diff] [blame] | 4947 | struct nfsd4_compound_state *cstate, struct svc_fh *fhp, |
| 4948 | stateid_t *stateid, int flags, struct file **filpp, bool *tmp_file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4949 | { |
Christoph Hellwig | a0649b2 | 2015-06-18 16:44:59 +0200 | [diff] [blame] | 4950 | struct inode *ino = d_inode(fhp->fh_dentry); |
Christoph Hellwig | af90f70 | 2015-06-18 16:45:00 +0200 | [diff] [blame] | 4951 | struct net *net = SVC_NET(rqstp); |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 4952 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Christoph Hellwig | af90f70 | 2015-06-18 16:45:00 +0200 | [diff] [blame] | 4953 | struct nfs4_stid *s = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4954 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4955 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4956 | if (filpp) |
| 4957 | *filpp = NULL; |
Christoph Hellwig | af90f70 | 2015-06-18 16:45:00 +0200 | [diff] [blame] | 4958 | if (tmp_file) |
| 4959 | *tmp_file = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4960 | |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 4961 | if (grace_disallows_io(net, ino)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4962 | return nfserr_grace; |
| 4963 | |
Christoph Hellwig | af90f70 | 2015-06-18 16:45:00 +0200 | [diff] [blame] | 4964 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
| 4965 | status = check_special_stateids(net, fhp, stateid, flags); |
| 4966 | goto done; |
| 4967 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4968 | |
Trond Myklebust | 2dd6e45 | 2014-06-30 11:48:43 -0400 | [diff] [blame] | 4969 | status = nfsd4_lookup_stateid(cstate, stateid, |
Jeff Layton | db24b3b | 2014-06-30 11:48:36 -0400 | [diff] [blame] | 4970 | NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
Trond Myklebust | 2dd6e45 | 2014-06-30 11:48:43 -0400 | [diff] [blame] | 4971 | &s, nn); |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 4972 | if (status) |
Trond Myklebust | c2d1d6a | 2014-07-30 08:27:25 -0400 | [diff] [blame] | 4973 | return status; |
Christoph Hellwig | a0649b2 | 2015-06-18 16:44:59 +0200 | [diff] [blame] | 4974 | status = check_stateid_generation(stateid, &s->sc_stateid, |
| 4975 | nfsd4_has_session(cstate)); |
J. Bruce Fields | 69064a2 | 2011-09-09 11:54:57 -0400 | [diff] [blame] | 4976 | if (status) |
| 4977 | goto out; |
Christoph Hellwig | a0649b2 | 2015-06-18 16:44:59 +0200 | [diff] [blame] | 4978 | |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 4979 | switch (s->sc_type) { |
| 4980 | case NFS4_DELEG_STID: |
Christoph Hellwig | a0649b2 | 2015-06-18 16:44:59 +0200 | [diff] [blame] | 4981 | status = nfs4_check_delegmode(delegstateid(s), flags); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 4982 | break; |
| 4983 | case NFS4_OPEN_STID: |
| 4984 | case NFS4_LOCK_STID: |
Christoph Hellwig | a0649b2 | 2015-06-18 16:44:59 +0200 | [diff] [blame] | 4985 | status = nfs4_check_olstateid(fhp, openlockstateid(s), flags); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 4986 | break; |
| 4987 | default: |
Trond Myklebust | 14bcab1 | 2014-04-18 14:44:07 -0400 | [diff] [blame] | 4988 | status = nfserr_bad_stateid; |
Christoph Hellwig | a0649b2 | 2015-06-18 16:44:59 +0200 | [diff] [blame] | 4989 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4990 | } |
Jeff Layton | 8fcd461 | 2015-07-30 06:57:46 -0400 | [diff] [blame] | 4991 | if (status) |
| 4992 | goto out; |
| 4993 | status = nfs4_check_fh(fhp, s); |
Christoph Hellwig | a0649b2 | 2015-06-18 16:44:59 +0200 | [diff] [blame] | 4994 | |
Christoph Hellwig | af90f70 | 2015-06-18 16:45:00 +0200 | [diff] [blame] | 4995 | done: |
| 4996 | if (!status && filpp) |
| 4997 | status = nfs4_check_file(rqstp, fhp, s, filpp, tmp_file, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4998 | out: |
Christoph Hellwig | af90f70 | 2015-06-18 16:45:00 +0200 | [diff] [blame] | 4999 | if (s) |
| 5000 | nfs4_put_stid(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5001 | return status; |
| 5002 | } |
| 5003 | |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 5004 | /* |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 5005 | * Test if the stateid is valid |
| 5006 | */ |
| 5007 | __be32 |
| 5008 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 5009 | struct nfsd4_test_stateid *test_stateid) |
| 5010 | { |
Bryan Schumaker | 03cfb42 | 2012-01-27 10:22:49 -0500 | [diff] [blame] | 5011 | struct nfsd4_test_stateid_id *stateid; |
| 5012 | struct nfs4_client *cl = cstate->session->se_client; |
| 5013 | |
Bryan Schumaker | 03cfb42 | 2012-01-27 10:22:49 -0500 | [diff] [blame] | 5014 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
Chuck Lever | 7df302f | 2012-05-29 13:56:37 -0400 | [diff] [blame] | 5015 | stateid->ts_id_status = |
| 5016 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); |
Bryan Schumaker | 03cfb42 | 2012-01-27 10:22:49 -0500 | [diff] [blame] | 5017 | |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 5018 | return nfs_ok; |
| 5019 | } |
| 5020 | |
Chuck Lever | 4269139 | 2016-08-11 10:37:30 -0400 | [diff] [blame] | 5021 | static __be32 |
| 5022 | nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s) |
| 5023 | { |
| 5024 | struct nfs4_ol_stateid *stp = openlockstateid(s); |
| 5025 | __be32 ret; |
| 5026 | |
| 5027 | mutex_lock(&stp->st_mutex); |
| 5028 | |
| 5029 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
| 5030 | if (ret) |
| 5031 | goto out; |
| 5032 | |
| 5033 | ret = nfserr_locks_held; |
| 5034 | if (check_for_locks(stp->st_stid.sc_file, |
| 5035 | lockowner(stp->st_stateowner))) |
| 5036 | goto out; |
| 5037 | |
| 5038 | release_lock_stateid(stp); |
| 5039 | ret = nfs_ok; |
| 5040 | |
| 5041 | out: |
| 5042 | mutex_unlock(&stp->st_mutex); |
| 5043 | nfs4_put_stid(s); |
| 5044 | return ret; |
| 5045 | } |
| 5046 | |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 5047 | __be32 |
| 5048 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 5049 | struct nfsd4_free_stateid *free_stateid) |
| 5050 | { |
| 5051 | stateid_t *stateid = &free_stateid->fr_stateid; |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 5052 | struct nfs4_stid *s; |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 5053 | struct nfs4_delegation *dp; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 5054 | struct nfs4_client *cl = cstate->session->se_client; |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 5055 | __be32 ret = nfserr_bad_stateid; |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 5056 | |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 5057 | spin_lock(&cl->cl_lock); |
| 5058 | s = find_stateid_locked(cl, stateid); |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 5059 | if (!s) |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 5060 | goto out_unlock; |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 5061 | switch (s->sc_type) { |
| 5062 | case NFS4_DELEG_STID: |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 5063 | ret = nfserr_locks_held; |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 5064 | break; |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 5065 | case NFS4_OPEN_STID: |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 5066 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
| 5067 | if (ret) |
| 5068 | break; |
| 5069 | ret = nfserr_locks_held; |
| 5070 | break; |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 5071 | case NFS4_LOCK_STID: |
Chuck Lever | 4269139 | 2016-08-11 10:37:30 -0400 | [diff] [blame] | 5072 | atomic_inc(&s->sc_count); |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 5073 | spin_unlock(&cl->cl_lock); |
Chuck Lever | 4269139 | 2016-08-11 10:37:30 -0400 | [diff] [blame] | 5074 | ret = nfsd4_free_lock_stateid(stateid, s); |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 5075 | goto out; |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 5076 | case NFS4_REVOKED_DELEG_STID: |
| 5077 | dp = delegstateid(s); |
Jeff Layton | 2d4a532 | 2014-07-25 07:34:21 -0400 | [diff] [blame] | 5078 | list_del_init(&dp->dl_recall_lru); |
| 5079 | spin_unlock(&cl->cl_lock); |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 5080 | nfs4_put_stid(s); |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 5081 | ret = nfs_ok; |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 5082 | goto out; |
| 5083 | /* Default falls through and returns nfserr_bad_stateid */ |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 5084 | } |
Jeff Layton | 1af71cc | 2014-07-29 21:34:14 -0400 | [diff] [blame] | 5085 | out_unlock: |
| 5086 | spin_unlock(&cl->cl_lock); |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 5087 | out: |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 5088 | return ret; |
| 5089 | } |
| 5090 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 5091 | static inline int |
| 5092 | setlkflg (int type) |
| 5093 | { |
| 5094 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? |
| 5095 | RD_STATE : WR_STATE; |
| 5096 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5097 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 5098 | static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 5099 | { |
| 5100 | struct svc_fh *current_fh = &cstate->current_fh; |
| 5101 | struct nfs4_stateowner *sop = stp->st_stateowner; |
| 5102 | __be32 status; |
| 5103 | |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 5104 | status = nfsd4_check_seqid(cstate, sop, seqid); |
| 5105 | if (status) |
| 5106 | return status; |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 5107 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID |
| 5108 | || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 5109 | /* |
| 5110 | * "Closed" stateid's exist *only* to return |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 5111 | * nfserr_replay_me from the previous step, and |
| 5112 | * revoked delegations are kept only for free_stateid. |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 5113 | */ |
| 5114 | return nfserr_bad_stateid; |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 5115 | mutex_lock(&stp->st_mutex); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 5116 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
Jeff Layton | 35a92fe | 2015-09-17 07:47:08 -0400 | [diff] [blame] | 5117 | if (status == nfs_ok) |
| 5118 | status = nfs4_check_fh(current_fh, &stp->st_stid); |
| 5119 | if (status != nfs_ok) |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 5120 | mutex_unlock(&stp->st_mutex); |
Jeff Layton | 35a92fe | 2015-09-17 07:47:08 -0400 | [diff] [blame] | 5121 | return status; |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 5122 | } |
| 5123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5124 | /* |
| 5125 | * Checks for sequence id mutating operations. |
| 5126 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 5127 | static __be32 |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 5128 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
J. Bruce Fields | 2288d0e | 2011-09-06 15:50:21 -0400 | [diff] [blame] | 5129 | stateid_t *stateid, char typemask, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5130 | struct nfs4_ol_stateid **stpp, |
| 5131 | struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5132 | { |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 5133 | __be32 status; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 5134 | struct nfs4_stid *s; |
Trond Myklebust | e17f99b | 2014-06-30 11:48:34 -0400 | [diff] [blame] | 5135 | struct nfs4_ol_stateid *stp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5136 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 5137 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
| 5138 | seqid, STATEID_VAL(stateid)); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 5139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5140 | *stpp = NULL; |
Trond Myklebust | 2dd6e45 | 2014-06-30 11:48:43 -0400 | [diff] [blame] | 5141 | status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 5142 | if (status) |
| 5143 | return status; |
Trond Myklebust | e17f99b | 2014-06-30 11:48:34 -0400 | [diff] [blame] | 5144 | stp = openlockstateid(s); |
Jeff Layton | 58fb12e | 2014-07-29 21:34:27 -0400 | [diff] [blame] | 5145 | nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5146 | |
Trond Myklebust | e17f99b | 2014-06-30 11:48:34 -0400 | [diff] [blame] | 5147 | status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); |
Trond Myklebust | fd91101 | 2014-07-29 21:34:24 -0400 | [diff] [blame] | 5148 | if (!status) |
Trond Myklebust | e17f99b | 2014-06-30 11:48:34 -0400 | [diff] [blame] | 5149 | *stpp = stp; |
Trond Myklebust | fd91101 | 2014-07-29 21:34:24 -0400 | [diff] [blame] | 5150 | else |
| 5151 | nfs4_put_stid(&stp->st_stid); |
Trond Myklebust | e17f99b | 2014-06-30 11:48:34 -0400 | [diff] [blame] | 5152 | return status; |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 5153 | } |
J. Bruce Fields | 39325bd | 2007-11-26 17:06:39 -0500 | [diff] [blame] | 5154 | |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5155 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
| 5156 | stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 5157 | { |
| 5158 | __be32 status; |
| 5159 | struct nfs4_openowner *oo; |
Trond Myklebust | 4cbfc9f | 2014-07-29 21:34:23 -0400 | [diff] [blame] | 5160 | struct nfs4_ol_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5161 | |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 5162 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
Trond Myklebust | 4cbfc9f | 2014-07-29 21:34:23 -0400 | [diff] [blame] | 5163 | NFS4_OPEN_STID, &stp, nn); |
J. Bruce Fields | 7a8711c | 2011-09-02 09:03:37 -0400 | [diff] [blame] | 5164 | if (status) |
| 5165 | return status; |
Trond Myklebust | 4cbfc9f | 2014-07-29 21:34:23 -0400 | [diff] [blame] | 5166 | oo = openowner(stp->st_stateowner); |
| 5167 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 5168 | mutex_unlock(&stp->st_mutex); |
Trond Myklebust | 4cbfc9f | 2014-07-29 21:34:23 -0400 | [diff] [blame] | 5169 | nfs4_put_stid(&stp->st_stid); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 5170 | return nfserr_bad_stateid; |
Trond Myklebust | 4cbfc9f | 2014-07-29 21:34:23 -0400 | [diff] [blame] | 5171 | } |
| 5172 | *stpp = stp; |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 5173 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5174 | } |
| 5175 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 5176 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 5177 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 5178 | struct nfsd4_open_confirm *oc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5179 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 5180 | __be32 status; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 5181 | struct nfs4_openowner *oo; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 5182 | struct nfs4_ol_stateid *stp; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5183 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5184 | |
Al Viro | a6a9f18 | 2013-09-16 10:57:01 -0400 | [diff] [blame] | 5185 | dprintk("NFSD: nfsd4_open_confirm on file %pd\n", |
| 5186 | cstate->current_fh.fh_dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5187 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 5188 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
J. Bruce Fields | a8cddc5 | 2006-06-30 01:56:13 -0700 | [diff] [blame] | 5189 | if (status) |
| 5190 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5191 | |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 5192 | status = nfs4_preprocess_seqid_op(cstate, |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 5193 | oc->oc_seqid, &oc->oc_req_stateid, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5194 | NFS4_OPEN_STID, &stp, nn); |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 5195 | if (status) |
J. Bruce Fields | 68b66e8 | 2011-09-02 12:19:43 -0400 | [diff] [blame] | 5196 | goto out; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 5197 | oo = openowner(stp->st_stateowner); |
J. Bruce Fields | 68b66e8 | 2011-09-02 12:19:43 -0400 | [diff] [blame] | 5198 | status = nfserr_bad_stateid; |
Jeff Layton | 35a92fe | 2015-09-17 07:47:08 -0400 | [diff] [blame] | 5199 | if (oo->oo_flags & NFS4_OO_CONFIRMED) { |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 5200 | mutex_unlock(&stp->st_mutex); |
Trond Myklebust | 2585fc7 | 2014-07-29 21:34:21 -0400 | [diff] [blame] | 5201 | goto put_stateid; |
Jeff Layton | 35a92fe | 2015-09-17 07:47:08 -0400 | [diff] [blame] | 5202 | } |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 5203 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
Jeff Layton | 9767feb | 2015-10-01 09:05:50 -0400 | [diff] [blame] | 5204 | nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 5205 | mutex_unlock(&stp->st_mutex); |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 5206 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 5207 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 5208 | |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 5209 | nfsd4_client_record_create(oo->oo_owner.so_client); |
J. Bruce Fields | 68b66e8 | 2011-09-02 12:19:43 -0400 | [diff] [blame] | 5210 | status = nfs_ok; |
Trond Myklebust | 2585fc7 | 2014-07-29 21:34:21 -0400 | [diff] [blame] | 5211 | put_stateid: |
| 5212 | nfs4_put_stid(&stp->st_stid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5213 | out: |
J. Bruce Fields | 9411b1d | 2013-04-01 16:37:12 -0400 | [diff] [blame] | 5214 | nfsd4_bump_seqid(cstate, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5215 | return status; |
| 5216 | } |
| 5217 | |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 5218 | static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5219 | { |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 5220 | if (!test_access(access, stp)) |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 5221 | return; |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 5222 | nfs4_file_put_access(stp->st_stid.sc_file, access); |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 5223 | clear_access(access, stp); |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 5224 | } |
J. Bruce Fields | f197c27 | 2011-06-29 08:23:50 -0400 | [diff] [blame] | 5225 | |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 5226 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
| 5227 | { |
| 5228 | switch (to_access) { |
| 5229 | case NFS4_SHARE_ACCESS_READ: |
| 5230 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); |
| 5231 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); |
| 5232 | break; |
| 5233 | case NFS4_SHARE_ACCESS_WRITE: |
| 5234 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); |
| 5235 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); |
| 5236 | break; |
| 5237 | case NFS4_SHARE_ACCESS_BOTH: |
| 5238 | break; |
| 5239 | default: |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 5240 | WARN_ON_ONCE(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5241 | } |
| 5242 | } |
| 5243 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 5244 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 5245 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
| 5246 | struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 5247 | struct nfsd4_open_downgrade *od) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5248 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 5249 | __be32 status; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 5250 | struct nfs4_ol_stateid *stp; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5251 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5252 | |
Al Viro | a6a9f18 | 2013-09-16 10:57:01 -0400 | [diff] [blame] | 5253 | dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", |
| 5254 | cstate->current_fh.fh_dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5255 | |
J. Bruce Fields | c30e92d | 2011-10-10 17:34:31 -0400 | [diff] [blame] | 5256 | /* We don't yet support WANT bits: */ |
Benny Halevy | 2c8bd7e | 2012-02-16 20:57:09 +0200 | [diff] [blame] | 5257 | if (od->od_deleg_want) |
| 5258 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, |
| 5259 | od->od_deleg_want); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5260 | |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 5261 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5262 | &od->od_stateid, &stp, nn); |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 5263 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5264 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5265 | status = nfserr_inval; |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 5266 | if (!test_access(od->od_share_access, stp)) { |
Jeff Layton | c11c591 | 2014-07-10 14:07:30 -0400 | [diff] [blame] | 5267 | dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5268 | stp->st_access_bmap, od->od_share_access); |
Trond Myklebust | 0667b1e | 2014-07-29 21:34:22 -0400 | [diff] [blame] | 5269 | goto put_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5270 | } |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 5271 | if (!test_deny(od->od_share_deny, stp)) { |
Jeff Layton | c11c591 | 2014-07-10 14:07:30 -0400 | [diff] [blame] | 5272 | dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5273 | stp->st_deny_bmap, od->od_share_deny); |
Trond Myklebust | 0667b1e | 2014-07-29 21:34:22 -0400 | [diff] [blame] | 5274 | goto put_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5275 | } |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 5276 | nfs4_stateid_downgrade(stp, od->od_share_access); |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 5277 | reset_union_bmap_deny(od->od_share_deny, stp); |
Jeff Layton | 9767feb | 2015-10-01 09:05:50 -0400 | [diff] [blame] | 5278 | nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5279 | status = nfs_ok; |
Trond Myklebust | 0667b1e | 2014-07-29 21:34:22 -0400 | [diff] [blame] | 5280 | put_stateid: |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 5281 | mutex_unlock(&stp->st_mutex); |
Trond Myklebust | 0667b1e | 2014-07-29 21:34:22 -0400 | [diff] [blame] | 5282 | nfs4_put_stid(&stp->st_stid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5283 | out: |
J. Bruce Fields | 9411b1d | 2013-04-01 16:37:12 -0400 | [diff] [blame] | 5284 | nfsd4_bump_seqid(cstate, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5285 | return status; |
| 5286 | } |
| 5287 | |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 5288 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
| 5289 | { |
Trond Myklebust | acf9295 | 2014-06-30 11:48:37 -0400 | [diff] [blame] | 5290 | struct nfs4_client *clp = s->st_stid.sc_client; |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 5291 | bool unhashed; |
Jeff Layton | d83017f | 2014-07-29 21:34:42 -0400 | [diff] [blame] | 5292 | LIST_HEAD(reaplist); |
Trond Myklebust | acf9295 | 2014-06-30 11:48:37 -0400 | [diff] [blame] | 5293 | |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 5294 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
Jeff Layton | 2c41beb | 2014-07-29 21:34:41 -0400 | [diff] [blame] | 5295 | spin_lock(&clp->cl_lock); |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 5296 | unhashed = unhash_open_stateid(s, &reaplist); |
Trond Myklebust | acf9295 | 2014-06-30 11:48:37 -0400 | [diff] [blame] | 5297 | |
Jeff Layton | d83017f | 2014-07-29 21:34:42 -0400 | [diff] [blame] | 5298 | if (clp->cl_minorversion) { |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 5299 | if (unhashed) |
| 5300 | put_ol_stateid_locked(s, &reaplist); |
Jeff Layton | d83017f | 2014-07-29 21:34:42 -0400 | [diff] [blame] | 5301 | spin_unlock(&clp->cl_lock); |
| 5302 | free_ol_stateid_reaplist(&reaplist); |
| 5303 | } else { |
| 5304 | spin_unlock(&clp->cl_lock); |
| 5305 | free_ol_stateid_reaplist(&reaplist); |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 5306 | if (unhashed) |
| 5307 | move_to_close_lru(s, clp->net); |
Jeff Layton | d83017f | 2014-07-29 21:34:42 -0400 | [diff] [blame] | 5308 | } |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 5309 | } |
| 5310 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5311 | /* |
| 5312 | * nfs4_unlock_state() called after encode |
| 5313 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 5314 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 5315 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 5316 | struct nfsd4_close *close) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5317 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 5318 | __be32 status; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 5319 | struct nfs4_ol_stateid *stp; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5320 | struct net *net = SVC_NET(rqstp); |
| 5321 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5322 | |
Al Viro | a6a9f18 | 2013-09-16 10:57:01 -0400 | [diff] [blame] | 5323 | dprintk("NFSD: nfsd4_close on file %pd\n", |
| 5324 | cstate->current_fh.fh_dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5325 | |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 5326 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
| 5327 | &close->cl_stateid, |
| 5328 | NFS4_OPEN_STID|NFS4_CLOSED_STID, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5329 | &stp, nn); |
J. Bruce Fields | 9411b1d | 2013-04-01 16:37:12 -0400 | [diff] [blame] | 5330 | nfsd4_bump_seqid(cstate, status); |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 5331 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5332 | goto out; |
Jeff Layton | 9767feb | 2015-10-01 09:05:50 -0400 | [diff] [blame] | 5333 | nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 5334 | mutex_unlock(&stp->st_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5335 | |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 5336 | nfsd4_close_open_stateid(stp); |
Trond Myklebust | 8a0b589 | 2014-07-29 21:34:20 -0400 | [diff] [blame] | 5337 | |
| 5338 | /* put reference from nfs4_preprocess_seqid_op */ |
| 5339 | nfs4_put_stid(&stp->st_stid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5340 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5341 | return status; |
| 5342 | } |
| 5343 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 5344 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 5345 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 5346 | struct nfsd4_delegreturn *dr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5347 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 5348 | struct nfs4_delegation *dp; |
| 5349 | stateid_t *stateid = &dr->dr_stateid; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 5350 | struct nfs4_stid *s; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 5351 | __be32 status; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5352 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5353 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 5354 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 5355 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5356 | |
Trond Myklebust | 2dd6e45 | 2014-06-30 11:48:43 -0400 | [diff] [blame] | 5357 | status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 5358 | if (status) |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 5359 | goto out; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 5360 | dp = delegstateid(s); |
J. Bruce Fields | d5477a8 | 2011-09-08 12:07:44 -0400 | [diff] [blame] | 5361 | status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 5362 | if (status) |
Trond Myklebust | fd91101 | 2014-07-29 21:34:24 -0400 | [diff] [blame] | 5363 | goto put_stateid; |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 5364 | |
J. Bruce Fields | 3bd64a5 | 2013-04-09 17:02:51 -0400 | [diff] [blame] | 5365 | destroy_delegation(dp); |
Trond Myklebust | fd91101 | 2014-07-29 21:34:24 -0400 | [diff] [blame] | 5366 | put_stateid: |
| 5367 | nfs4_put_stid(&dp->dl_stid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5368 | out: |
| 5369 | return status; |
| 5370 | } |
| 5371 | |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 5372 | static inline u64 |
| 5373 | end_offset(u64 start, u64 len) |
| 5374 | { |
| 5375 | u64 end; |
| 5376 | |
| 5377 | end = start + len; |
| 5378 | return end >= start ? end: NFS4_MAX_UINT64; |
| 5379 | } |
| 5380 | |
| 5381 | /* last octet in a range */ |
| 5382 | static inline u64 |
| 5383 | last_byte_offset(u64 start, u64 len) |
| 5384 | { |
| 5385 | u64 end; |
| 5386 | |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 5387 | WARN_ON_ONCE(!len); |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 5388 | end = start + len; |
| 5389 | return end > start ? end - 1: NFS4_MAX_UINT64; |
| 5390 | } |
| 5391 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5392 | /* |
| 5393 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that |
| 5394 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th |
| 5395 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit |
| 5396 | * locking, this prevents us from being completely protocol-compliant. The |
| 5397 | * real solution to this problem is to start using unsigned file offsets in |
| 5398 | * the VFS, but this is a very deep change! |
| 5399 | */ |
| 5400 | static inline void |
| 5401 | nfs4_transform_lock_offset(struct file_lock *lock) |
| 5402 | { |
| 5403 | if (lock->fl_start < 0) |
| 5404 | lock->fl_start = OFFSET_MAX; |
| 5405 | if (lock->fl_end < 0) |
| 5406 | lock->fl_end = OFFSET_MAX; |
| 5407 | } |
| 5408 | |
Jeff Layton | cae80b3 | 2015-04-03 09:04:04 -0400 | [diff] [blame] | 5409 | static fl_owner_t |
| 5410 | nfsd4_fl_get_owner(fl_owner_t owner) |
Kinglong Mee | aef9583 | 2014-08-22 10:18:44 -0400 | [diff] [blame] | 5411 | { |
Jeff Layton | cae80b3 | 2015-04-03 09:04:04 -0400 | [diff] [blame] | 5412 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
| 5413 | |
| 5414 | nfs4_get_stateowner(&lo->lo_owner); |
| 5415 | return owner; |
Kinglong Mee | aef9583 | 2014-08-22 10:18:44 -0400 | [diff] [blame] | 5416 | } |
| 5417 | |
Jeff Layton | cae80b3 | 2015-04-03 09:04:04 -0400 | [diff] [blame] | 5418 | static void |
| 5419 | nfsd4_fl_put_owner(fl_owner_t owner) |
Kinglong Mee | aef9583 | 2014-08-22 10:18:44 -0400 | [diff] [blame] | 5420 | { |
Jeff Layton | cae80b3 | 2015-04-03 09:04:04 -0400 | [diff] [blame] | 5421 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; |
Kinglong Mee | aef9583 | 2014-08-22 10:18:44 -0400 | [diff] [blame] | 5422 | |
Jeff Layton | cae80b3 | 2015-04-03 09:04:04 -0400 | [diff] [blame] | 5423 | if (lo) |
Kinglong Mee | aef9583 | 2014-08-22 10:18:44 -0400 | [diff] [blame] | 5424 | nfs4_put_stateowner(&lo->lo_owner); |
Kinglong Mee | aef9583 | 2014-08-22 10:18:44 -0400 | [diff] [blame] | 5425 | } |
| 5426 | |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5427 | static void |
| 5428 | nfsd4_lm_notify(struct file_lock *fl) |
| 5429 | { |
| 5430 | struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner; |
| 5431 | struct net *net = lo->lo_owner.so_client->net; |
| 5432 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
| 5433 | struct nfsd4_blocked_lock *nbl = container_of(fl, |
| 5434 | struct nfsd4_blocked_lock, nbl_lock); |
| 5435 | bool queue = false; |
| 5436 | |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 5437 | /* An empty list means that something else is going to be using it */ |
Jeff Layton | 0cc11a6 | 2016-10-20 09:34:31 -0400 | [diff] [blame] | 5438 | spin_lock(&nn->blocked_locks_lock); |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5439 | if (!list_empty(&nbl->nbl_list)) { |
| 5440 | list_del_init(&nbl->nbl_list); |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 5441 | list_del_init(&nbl->nbl_lru); |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5442 | queue = true; |
| 5443 | } |
Jeff Layton | 0cc11a6 | 2016-10-20 09:34:31 -0400 | [diff] [blame] | 5444 | spin_unlock(&nn->blocked_locks_lock); |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5445 | |
| 5446 | if (queue) |
| 5447 | nfsd4_run_cb(&nbl->nbl_cb); |
| 5448 | } |
| 5449 | |
Alexey Dobriyan | 7b02196 | 2009-09-21 17:01:12 -0700 | [diff] [blame] | 5450 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5451 | .lm_notify = nfsd4_lm_notify, |
Kinglong Mee | aef9583 | 2014-08-22 10:18:44 -0400 | [diff] [blame] | 5452 | .lm_get_owner = nfsd4_fl_get_owner, |
| 5453 | .lm_put_owner = nfsd4_fl_put_owner, |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 5454 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5455 | |
| 5456 | static inline void |
| 5457 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) |
| 5458 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 5459 | struct nfs4_lockowner *lo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5460 | |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 5461 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 5462 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
| 5463 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, |
| 5464 | lo->lo_owner.so_owner.len, GFP_KERNEL); |
J. Bruce Fields | 7c13f34 | 2011-08-30 22:15:47 -0400 | [diff] [blame] | 5465 | if (!deny->ld_owner.data) |
| 5466 | /* We just don't care that much */ |
| 5467 | goto nevermind; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 5468 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
| 5469 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 5470 | } else { |
J. Bruce Fields | 7c13f34 | 2011-08-30 22:15:47 -0400 | [diff] [blame] | 5471 | nevermind: |
| 5472 | deny->ld_owner.len = 0; |
| 5473 | deny->ld_owner.data = NULL; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 5474 | deny->ld_clientid.cl_boot = 0; |
| 5475 | deny->ld_clientid.cl_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5476 | } |
| 5477 | deny->ld_start = fl->fl_start; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 5478 | deny->ld_length = NFS4_MAX_UINT64; |
| 5479 | if (fl->fl_end != NFS4_MAX_UINT64) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5480 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
| 5481 | deny->ld_type = NFS4_READ_LT; |
| 5482 | if (fl->fl_type != F_RDLCK) |
| 5483 | deny->ld_type = NFS4_WRITE_LT; |
| 5484 | } |
| 5485 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 5486 | static struct nfs4_lockowner * |
Kinglong Mee | c862399 | 2015-07-13 17:35:37 +0800 | [diff] [blame] | 5487 | find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5488 | { |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 5489 | unsigned int strhashval = ownerstr_hashval(owner); |
Trond Myklebust | b3c32bc | 2014-06-30 11:48:40 -0400 | [diff] [blame] | 5490 | struct nfs4_stateowner *so; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5491 | |
Trond Myklebust | 0a880a2 | 2014-07-30 08:27:10 -0400 | [diff] [blame] | 5492 | lockdep_assert_held(&clp->cl_lock); |
| 5493 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 5494 | list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], |
| 5495 | so_strhash) { |
Trond Myklebust | b3c32bc | 2014-06-30 11:48:40 -0400 | [diff] [blame] | 5496 | if (so->so_is_open_owner) |
| 5497 | continue; |
Kinglong Mee | b5971af | 2014-08-22 10:18:43 -0400 | [diff] [blame] | 5498 | if (same_owner_str(so, owner)) |
| 5499 | return lockowner(nfs4_get_stateowner(so)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5500 | } |
| 5501 | return NULL; |
| 5502 | } |
| 5503 | |
Trond Myklebust | c58c661 | 2014-07-29 21:34:35 -0400 | [diff] [blame] | 5504 | static struct nfs4_lockowner * |
Kinglong Mee | c862399 | 2015-07-13 17:35:37 +0800 | [diff] [blame] | 5505 | find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) |
Trond Myklebust | c58c661 | 2014-07-29 21:34:35 -0400 | [diff] [blame] | 5506 | { |
| 5507 | struct nfs4_lockowner *lo; |
| 5508 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 5509 | spin_lock(&clp->cl_lock); |
Kinglong Mee | c862399 | 2015-07-13 17:35:37 +0800 | [diff] [blame] | 5510 | lo = find_lockowner_str_locked(clp, owner); |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 5511 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | c58c661 | 2014-07-29 21:34:35 -0400 | [diff] [blame] | 5512 | return lo; |
| 5513 | } |
| 5514 | |
Jeff Layton | 8f4b54c | 2014-07-29 21:34:29 -0400 | [diff] [blame] | 5515 | static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) |
| 5516 | { |
Trond Myklebust | c58c661 | 2014-07-29 21:34:35 -0400 | [diff] [blame] | 5517 | unhash_lockowner_locked(lockowner(sop)); |
Jeff Layton | 8f4b54c | 2014-07-29 21:34:29 -0400 | [diff] [blame] | 5518 | } |
| 5519 | |
Jeff Layton | 6b180f0 | 2014-07-29 21:34:26 -0400 | [diff] [blame] | 5520 | static void nfs4_free_lockowner(struct nfs4_stateowner *sop) |
| 5521 | { |
| 5522 | struct nfs4_lockowner *lo = lockowner(sop); |
| 5523 | |
| 5524 | kmem_cache_free(lockowner_slab, lo); |
| 5525 | } |
| 5526 | |
| 5527 | static const struct nfs4_stateowner_operations lockowner_ops = { |
Jeff Layton | 8f4b54c | 2014-07-29 21:34:29 -0400 | [diff] [blame] | 5528 | .so_unhash = nfs4_unhash_lockowner, |
| 5529 | .so_free = nfs4_free_lockowner, |
Jeff Layton | 6b180f0 | 2014-07-29 21:34:26 -0400 | [diff] [blame] | 5530 | }; |
| 5531 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5532 | /* |
| 5533 | * Alloc a lock owner structure. |
| 5534 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 5535 | * occurred. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5536 | * |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 5537 | * strhashval = ownerstr_hashval |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5538 | */ |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 5539 | static struct nfs4_lockowner * |
Trond Myklebust | c58c661 | 2014-07-29 21:34:35 -0400 | [diff] [blame] | 5540 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, |
| 5541 | struct nfs4_ol_stateid *open_stp, |
| 5542 | struct nfsd4_lock *lock) |
| 5543 | { |
Trond Myklebust | c58c661 | 2014-07-29 21:34:35 -0400 | [diff] [blame] | 5544 | struct nfs4_lockowner *lo, *ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5545 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 5546 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
| 5547 | if (!lo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5548 | return NULL; |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5549 | INIT_LIST_HEAD(&lo->lo_blocked); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 5550 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
| 5551 | lo->lo_owner.so_is_open_owner = 0; |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 5552 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; |
Jeff Layton | 6b180f0 | 2014-07-29 21:34:26 -0400 | [diff] [blame] | 5553 | lo->lo_owner.so_ops = &lockowner_ops; |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 5554 | spin_lock(&clp->cl_lock); |
Kinglong Mee | c862399 | 2015-07-13 17:35:37 +0800 | [diff] [blame] | 5555 | ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); |
Trond Myklebust | c58c661 | 2014-07-29 21:34:35 -0400 | [diff] [blame] | 5556 | if (ret == NULL) { |
| 5557 | list_add(&lo->lo_owner.so_strhash, |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 5558 | &clp->cl_ownerstr_hashtbl[strhashval]); |
Trond Myklebust | c58c661 | 2014-07-29 21:34:35 -0400 | [diff] [blame] | 5559 | ret = lo; |
| 5560 | } else |
Kinglong Mee | d50ffde | 2015-07-16 12:05:07 +0800 | [diff] [blame] | 5561 | nfs4_free_stateowner(&lo->lo_owner); |
| 5562 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 5563 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | 340f0ba | 2015-03-23 11:02:30 -0400 | [diff] [blame] | 5564 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5565 | } |
| 5566 | |
Jeff Layton | 356a95e | 2014-07-29 21:34:13 -0400 | [diff] [blame] | 5567 | static void |
| 5568 | init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, |
| 5569 | struct nfs4_file *fp, struct inode *inode, |
| 5570 | struct nfs4_ol_stateid *open_stp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5571 | { |
J. Bruce Fields | d3b313a | 2011-09-15 15:02:41 -0400 | [diff] [blame] | 5572 | struct nfs4_client *clp = lo->lo_owner.so_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5573 | |
Jeff Layton | 356a95e | 2014-07-29 21:34:13 -0400 | [diff] [blame] | 5574 | lockdep_assert_held(&clp->cl_lock); |
| 5575 | |
Trond Myklebust | 3d0fabd | 2014-07-29 21:34:15 -0400 | [diff] [blame] | 5576 | atomic_inc(&stp->st_stid.sc_count); |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 5577 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
Kinglong Mee | b5971af | 2014-08-22 10:18:43 -0400 | [diff] [blame] | 5578 | stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 5579 | get_nfs4_file(fp); |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 5580 | stp->st_stid.sc_file = fp; |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 5581 | stp->st_access_bmap = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5582 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 5583 | stp->st_openstp = open_stp; |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 5584 | mutex_init(&stp->st_mutex); |
Trond Myklebust | 3c87b9b | 2014-06-30 11:48:38 -0400 | [diff] [blame] | 5585 | list_add(&stp->st_locks, &open_stp->st_locks); |
Jeff Layton | 1c755dc | 2014-07-29 21:34:12 -0400 | [diff] [blame] | 5586 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
Trond Myklebust | 1d31a25 | 2014-07-10 14:07:25 -0400 | [diff] [blame] | 5587 | spin_lock(&fp->fi_lock); |
| 5588 | list_add(&stp->st_perfile, &fp->fi_stateids); |
| 5589 | spin_unlock(&fp->fi_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5590 | } |
| 5591 | |
Jeff Layton | c53530d | 2014-06-30 11:48:39 -0400 | [diff] [blame] | 5592 | static struct nfs4_ol_stateid * |
| 5593 | find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) |
| 5594 | { |
| 5595 | struct nfs4_ol_stateid *lst; |
Jeff Layton | 356a95e | 2014-07-29 21:34:13 -0400 | [diff] [blame] | 5596 | struct nfs4_client *clp = lo->lo_owner.so_client; |
| 5597 | |
| 5598 | lockdep_assert_held(&clp->cl_lock); |
Jeff Layton | c53530d | 2014-06-30 11:48:39 -0400 | [diff] [blame] | 5599 | |
| 5600 | list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { |
Trond Myklebust | 3d0fabd | 2014-07-29 21:34:15 -0400 | [diff] [blame] | 5601 | if (lst->st_stid.sc_file == fp) { |
| 5602 | atomic_inc(&lst->st_stid.sc_count); |
Jeff Layton | c53530d | 2014-06-30 11:48:39 -0400 | [diff] [blame] | 5603 | return lst; |
Trond Myklebust | 3d0fabd | 2014-07-29 21:34:15 -0400 | [diff] [blame] | 5604 | } |
Jeff Layton | c53530d | 2014-06-30 11:48:39 -0400 | [diff] [blame] | 5605 | } |
| 5606 | return NULL; |
| 5607 | } |
| 5608 | |
Jeff Layton | 356a95e | 2014-07-29 21:34:13 -0400 | [diff] [blame] | 5609 | static struct nfs4_ol_stateid * |
| 5610 | find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, |
| 5611 | struct inode *inode, struct nfs4_ol_stateid *ost, |
| 5612 | bool *new) |
| 5613 | { |
| 5614 | struct nfs4_stid *ns = NULL; |
| 5615 | struct nfs4_ol_stateid *lst; |
| 5616 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
| 5617 | struct nfs4_client *clp = oo->oo_owner.so_client; |
| 5618 | |
| 5619 | spin_lock(&clp->cl_lock); |
| 5620 | lst = find_lock_stateid(lo, fi); |
| 5621 | if (lst == NULL) { |
| 5622 | spin_unlock(&clp->cl_lock); |
Kinglong Mee | d19fb70 | 2017-01-18 19:04:42 +0800 | [diff] [blame] | 5623 | ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid); |
Jeff Layton | 356a95e | 2014-07-29 21:34:13 -0400 | [diff] [blame] | 5624 | if (ns == NULL) |
| 5625 | return NULL; |
| 5626 | |
| 5627 | spin_lock(&clp->cl_lock); |
| 5628 | lst = find_lock_stateid(lo, fi); |
| 5629 | if (likely(!lst)) { |
| 5630 | lst = openlockstateid(ns); |
| 5631 | init_lock_stateid(lst, lo, fi, inode, ost); |
| 5632 | ns = NULL; |
| 5633 | *new = true; |
| 5634 | } |
| 5635 | } |
| 5636 | spin_unlock(&clp->cl_lock); |
| 5637 | if (ns) |
| 5638 | nfs4_put_stid(ns); |
| 5639 | return lst; |
| 5640 | } |
Jeff Layton | c53530d | 2014-06-30 11:48:39 -0400 | [diff] [blame] | 5641 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 5642 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5643 | check_lock_length(u64 offset, u64 length) |
| 5644 | { |
Kinglong Mee | e796931 | 2015-07-13 17:34:19 +0800 | [diff] [blame] | 5645 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
| 5646 | (length > ~offset))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5647 | } |
| 5648 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 5649 | static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 5650 | { |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 5651 | struct nfs4_file *fp = lock_stp->st_stid.sc_file; |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 5652 | |
Jeff Layton | 7214e86 | 2014-07-10 14:07:33 -0400 | [diff] [blame] | 5653 | lockdep_assert_held(&fp->fi_lock); |
| 5654 | |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 5655 | if (test_access(access, lock_stp)) |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 5656 | return; |
Jeff Layton | 1265965 | 2014-07-10 14:07:28 -0400 | [diff] [blame] | 5657 | __nfs4_file_get_access(fp, access); |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 5658 | set_access(access, lock_stp); |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 5659 | } |
| 5660 | |
Jeff Layton | 356a95e | 2014-07-29 21:34:13 -0400 | [diff] [blame] | 5661 | static __be32 |
| 5662 | lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, |
| 5663 | struct nfs4_ol_stateid *ost, |
| 5664 | struct nfsd4_lock *lock, |
Jeff Layton | dd25793 | 2016-08-11 10:37:39 -0400 | [diff] [blame] | 5665 | struct nfs4_ol_stateid **plst, bool *new) |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 5666 | { |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 5667 | __be32 status; |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 5668 | struct nfs4_file *fi = ost->st_stid.sc_file; |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 5669 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
| 5670 | struct nfs4_client *cl = oo->oo_owner.so_client; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 5671 | struct inode *inode = d_inode(cstate->current_fh.fh_dentry); |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 5672 | struct nfs4_lockowner *lo; |
Jeff Layton | dd25793 | 2016-08-11 10:37:39 -0400 | [diff] [blame] | 5673 | struct nfs4_ol_stateid *lst; |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 5674 | unsigned int strhashval; |
Jeff Layton | dd25793 | 2016-08-11 10:37:39 -0400 | [diff] [blame] | 5675 | bool hashed; |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 5676 | |
Kinglong Mee | c862399 | 2015-07-13 17:35:37 +0800 | [diff] [blame] | 5677 | lo = find_lockowner_str(cl, &lock->lk_new_owner); |
Jeff Layton | c53530d | 2014-06-30 11:48:39 -0400 | [diff] [blame] | 5678 | if (!lo) { |
Kinglong Mee | 76f6c9e1 | 2015-07-13 17:35:10 +0800 | [diff] [blame] | 5679 | strhashval = ownerstr_hashval(&lock->lk_new_owner); |
Jeff Layton | c53530d | 2014-06-30 11:48:39 -0400 | [diff] [blame] | 5680 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
| 5681 | if (lo == NULL) |
| 5682 | return nfserr_jukebox; |
| 5683 | } else { |
| 5684 | /* with an existing lockowner, seqids must be the same */ |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 5685 | status = nfserr_bad_seqid; |
Jeff Layton | c53530d | 2014-06-30 11:48:39 -0400 | [diff] [blame] | 5686 | if (!cstate->minorversion && |
| 5687 | lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 5688 | goto out; |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 5689 | } |
Jeff Layton | c53530d | 2014-06-30 11:48:39 -0400 | [diff] [blame] | 5690 | |
Jeff Layton | dd25793 | 2016-08-11 10:37:39 -0400 | [diff] [blame] | 5691 | retry: |
| 5692 | lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); |
| 5693 | if (lst == NULL) { |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 5694 | status = nfserr_jukebox; |
| 5695 | goto out; |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 5696 | } |
Jeff Layton | dd25793 | 2016-08-11 10:37:39 -0400 | [diff] [blame] | 5697 | |
| 5698 | mutex_lock(&lst->st_mutex); |
| 5699 | |
| 5700 | /* See if it's still hashed to avoid race with FREE_STATEID */ |
| 5701 | spin_lock(&cl->cl_lock); |
| 5702 | hashed = !list_empty(&lst->st_perfile); |
| 5703 | spin_unlock(&cl->cl_lock); |
| 5704 | |
| 5705 | if (!hashed) { |
| 5706 | mutex_unlock(&lst->st_mutex); |
| 5707 | nfs4_put_stid(&lst->st_stid); |
| 5708 | goto retry; |
| 5709 | } |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 5710 | status = nfs_ok; |
Jeff Layton | dd25793 | 2016-08-11 10:37:39 -0400 | [diff] [blame] | 5711 | *plst = lst; |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 5712 | out: |
| 5713 | nfs4_put_stateowner(&lo->lo_owner); |
| 5714 | return status; |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 5715 | } |
| 5716 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5717 | /* |
| 5718 | * LOCK operation |
| 5719 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 5720 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 5721 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 5722 | struct nfsd4_lock *lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5723 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 5724 | struct nfs4_openowner *open_sop = NULL; |
| 5725 | struct nfs4_lockowner *lock_sop = NULL; |
Trond Myklebust | 3d0fabd | 2014-07-29 21:34:15 -0400 | [diff] [blame] | 5726 | struct nfs4_ol_stateid *lock_stp = NULL; |
Trond Myklebust | 0667b1e | 2014-07-29 21:34:22 -0400 | [diff] [blame] | 5727 | struct nfs4_ol_stateid *open_stp = NULL; |
Jeff Layton | 7214e86 | 2014-07-10 14:07:33 -0400 | [diff] [blame] | 5728 | struct nfs4_file *fp; |
J. Bruce Fields | 7d94784 | 2010-08-20 18:09:31 -0400 | [diff] [blame] | 5729 | struct file *filp = NULL; |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5730 | struct nfsd4_blocked_lock *nbl = NULL; |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 5731 | struct file_lock *file_lock = NULL; |
| 5732 | struct file_lock *conflock = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 5733 | __be32 status = 0; |
J. Bruce Fields | b34f27a | 2011-08-22 13:13:31 -0400 | [diff] [blame] | 5734 | int lkflg; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 5735 | int err; |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 5736 | bool new = false; |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5737 | unsigned char fl_type; |
| 5738 | unsigned int fl_flags = FL_POSIX; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5739 | struct net *net = SVC_NET(rqstp); |
| 5740 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5741 | |
| 5742 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", |
| 5743 | (long long) lock->lk_offset, |
| 5744 | (long long) lock->lk_length); |
| 5745 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5746 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
| 5747 | return nfserr_inval; |
| 5748 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 5749 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 5750 | S_IFREG, NFSD_MAY_LOCK))) { |
Andy Adamson | a6f6ef2 | 2006-01-18 17:43:17 -0800 | [diff] [blame] | 5751 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
| 5752 | return status; |
| 5753 | } |
| 5754 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5755 | if (lock->lk_is_new) { |
J. Bruce Fields | 684e563 | 2011-11-04 17:08:10 -0400 | [diff] [blame] | 5756 | if (nfsd4_has_session(cstate)) |
| 5757 | /* See rfc 5661 18.10.3: given clientid is ignored: */ |
Kinglong Mee | 76f6c9e1 | 2015-07-13 17:35:10 +0800 | [diff] [blame] | 5758 | memcpy(&lock->lk_new_clientid, |
J. Bruce Fields | 684e563 | 2011-11-04 17:08:10 -0400 | [diff] [blame] | 5759 | &cstate->session->se_client->cl_clientid, |
| 5760 | sizeof(clientid_t)); |
| 5761 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5762 | status = nfserr_stale_clientid; |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 5763 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5764 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5765 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5766 | /* validate and update open stateid and open seqid */ |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 5767 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5768 | lock->lk_new_open_seqid, |
| 5769 | &lock->lk_new_open_stateid, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5770 | &open_stp, nn); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 5771 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5772 | goto out; |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 5773 | mutex_unlock(&open_stp->st_mutex); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 5774 | open_sop = openowner(open_stp->st_stateowner); |
J. Bruce Fields | b34f27a | 2011-08-22 13:13:31 -0400 | [diff] [blame] | 5775 | status = nfserr_bad_stateid; |
J. Bruce Fields | 684e563 | 2011-11-04 17:08:10 -0400 | [diff] [blame] | 5776 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
Kinglong Mee | 76f6c9e1 | 2015-07-13 17:35:10 +0800 | [diff] [blame] | 5777 | &lock->lk_new_clientid)) |
J. Bruce Fields | b34f27a | 2011-08-22 13:13:31 -0400 | [diff] [blame] | 5778 | goto out; |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 5779 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 5780 | &lock_stp, &new); |
Trond Myklebust | 3d0fabd | 2014-07-29 21:34:15 -0400 | [diff] [blame] | 5781 | } else { |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 5782 | status = nfs4_preprocess_seqid_op(cstate, |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 5783 | lock->lk_old_lock_seqid, |
| 5784 | &lock->lk_old_lock_stateid, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5785 | NFS4_LOCK_STID, &lock_stp, nn); |
Trond Myklebust | 3d0fabd | 2014-07-29 21:34:15 -0400 | [diff] [blame] | 5786 | } |
J. Bruce Fields | e1aaa89 | 2012-06-06 16:01:37 -0400 | [diff] [blame] | 5787 | if (status) |
| 5788 | goto out; |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 5789 | lock_sop = lockowner(lock_stp->st_stateowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5790 | |
J. Bruce Fields | b34f27a | 2011-08-22 13:13:31 -0400 | [diff] [blame] | 5791 | lkflg = setlkflg(lock->lk_type); |
| 5792 | status = nfs4_check_openmode(lock_stp, lkflg); |
| 5793 | if (status) |
| 5794 | goto out; |
| 5795 | |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 5796 | status = nfserr_grace; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5797 | if (locks_in_grace(net) && !lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 5798 | goto out; |
| 5799 | status = nfserr_no_grace; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 5800 | if (!locks_in_grace(net) && lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 5801 | goto out; |
| 5802 | |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 5803 | fp = lock_stp->st_stid.sc_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5804 | switch (lock->lk_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5805 | case NFS4_READW_LT: |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5806 | if (nfsd4_has_session(cstate)) |
| 5807 | fl_flags |= FL_SLEEP; |
| 5808 | /* Fallthrough */ |
| 5809 | case NFS4_READ_LT: |
Jeff Layton | 7214e86 | 2014-07-10 14:07:33 -0400 | [diff] [blame] | 5810 | spin_lock(&fp->fi_lock); |
| 5811 | filp = find_readable_file_locked(fp); |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 5812 | if (filp) |
| 5813 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); |
Jeff Layton | 7214e86 | 2014-07-10 14:07:33 -0400 | [diff] [blame] | 5814 | spin_unlock(&fp->fi_lock); |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5815 | fl_type = F_RDLCK; |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 5816 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5817 | case NFS4_WRITEW_LT: |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5818 | if (nfsd4_has_session(cstate)) |
| 5819 | fl_flags |= FL_SLEEP; |
| 5820 | /* Fallthrough */ |
| 5821 | case NFS4_WRITE_LT: |
Jeff Layton | 7214e86 | 2014-07-10 14:07:33 -0400 | [diff] [blame] | 5822 | spin_lock(&fp->fi_lock); |
| 5823 | filp = find_writeable_file_locked(fp); |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 5824 | if (filp) |
| 5825 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); |
Jeff Layton | 7214e86 | 2014-07-10 14:07:33 -0400 | [diff] [blame] | 5826 | spin_unlock(&fp->fi_lock); |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5827 | fl_type = F_WRLCK; |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 5828 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5829 | default: |
| 5830 | status = nfserr_inval; |
| 5831 | goto out; |
| 5832 | } |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5833 | |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 5834 | if (!filp) { |
| 5835 | status = nfserr_openmode; |
| 5836 | goto out; |
| 5837 | } |
Kinglong Mee | aef9583 | 2014-08-22 10:18:44 -0400 | [diff] [blame] | 5838 | |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5839 | nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn); |
| 5840 | if (!nbl) { |
| 5841 | dprintk("NFSD: %s: unable to allocate block!\n", __func__); |
| 5842 | status = nfserr_jukebox; |
| 5843 | goto out; |
| 5844 | } |
| 5845 | |
| 5846 | file_lock = &nbl->nbl_lock; |
| 5847 | file_lock->fl_type = fl_type; |
Kinglong Mee | aef9583 | 2014-08-22 10:18:44 -0400 | [diff] [blame] | 5848 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 5849 | file_lock->fl_pid = current->tgid; |
| 5850 | file_lock->fl_file = filp; |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5851 | file_lock->fl_flags = fl_flags; |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 5852 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
| 5853 | file_lock->fl_start = lock->lk_offset; |
| 5854 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
| 5855 | nfs4_transform_lock_offset(file_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5856 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 5857 | conflock = locks_alloc_lock(); |
| 5858 | if (!conflock) { |
| 5859 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); |
| 5860 | status = nfserr_jukebox; |
| 5861 | goto out; |
| 5862 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5863 | |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5864 | if (fl_flags & FL_SLEEP) { |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 5865 | nbl->nbl_time = jiffies; |
Jeff Layton | 0cc11a6 | 2016-10-20 09:34:31 -0400 | [diff] [blame] | 5866 | spin_lock(&nn->blocked_locks_lock); |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5867 | list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 5868 | list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); |
Jeff Layton | 0cc11a6 | 2016-10-20 09:34:31 -0400 | [diff] [blame] | 5869 | spin_unlock(&nn->blocked_locks_lock); |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5870 | } |
| 5871 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 5872 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5873 | switch (err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5874 | case 0: /* success! */ |
Jeff Layton | 9767feb | 2015-10-01 09:05:50 -0400 | [diff] [blame] | 5875 | nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 5876 | status = 0; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 5877 | break; |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5878 | case FILE_LOCK_DEFERRED: |
| 5879 | nbl = NULL; |
| 5880 | /* Fallthrough */ |
| 5881 | case -EAGAIN: /* conflock holds conflicting lock */ |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 5882 | status = nfserr_denied; |
| 5883 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 5884 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 5885 | break; |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5886 | case -EDEADLK: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5887 | status = nfserr_deadlock; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 5888 | break; |
J. Bruce Fields | 3e77246 | 2011-08-10 19:07:33 -0400 | [diff] [blame] | 5889 | default: |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 5890 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
J. Bruce Fields | 3e77246 | 2011-08-10 19:07:33 -0400 | [diff] [blame] | 5891 | status = nfserrno(err); |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 5892 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5893 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5894 | out: |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5895 | if (nbl) { |
| 5896 | /* dequeue it if we queued it before */ |
| 5897 | if (fl_flags & FL_SLEEP) { |
Jeff Layton | 0cc11a6 | 2016-10-20 09:34:31 -0400 | [diff] [blame] | 5898 | spin_lock(&nn->blocked_locks_lock); |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5899 | list_del_init(&nbl->nbl_list); |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 5900 | list_del_init(&nbl->nbl_lru); |
Jeff Layton | 0cc11a6 | 2016-10-20 09:34:31 -0400 | [diff] [blame] | 5901 | spin_unlock(&nn->blocked_locks_lock); |
Jeff Layton | 76d348f | 2016-09-16 16:28:24 -0400 | [diff] [blame] | 5902 | } |
| 5903 | free_blocked_lock(nbl); |
| 5904 | } |
Trond Myklebust | de18643 | 2014-07-10 14:07:26 -0400 | [diff] [blame] | 5905 | if (filp) |
| 5906 | fput(filp); |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 5907 | if (lock_stp) { |
| 5908 | /* Bump seqid manually if the 4.0 replay owner is openowner */ |
| 5909 | if (cstate->replay_owner && |
| 5910 | cstate->replay_owner != &lock_sop->lo_owner && |
| 5911 | seqid_mutating_err(ntohl(status))) |
| 5912 | lock_sop->lo_owner.so_seqid++; |
| 5913 | |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 5914 | mutex_unlock(&lock_stp->st_mutex); |
Jeff Layton | 35a92fe | 2015-09-17 07:47:08 -0400 | [diff] [blame] | 5915 | |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 5916 | /* |
| 5917 | * If this is a new, never-before-used stateid, and we are |
| 5918 | * returning an error, then just go ahead and release it. |
| 5919 | */ |
| 5920 | if (status && new) |
| 5921 | release_lock_stateid(lock_stp); |
| 5922 | |
Trond Myklebust | 3d0fabd | 2014-07-29 21:34:15 -0400 | [diff] [blame] | 5923 | nfs4_put_stid(&lock_stp->st_stid); |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 5924 | } |
Trond Myklebust | 0667b1e | 2014-07-29 21:34:22 -0400 | [diff] [blame] | 5925 | if (open_stp) |
| 5926 | nfs4_put_stid(&open_stp->st_stid); |
J. Bruce Fields | 9411b1d | 2013-04-01 16:37:12 -0400 | [diff] [blame] | 5927 | nfsd4_bump_seqid(cstate, status); |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 5928 | if (conflock) |
| 5929 | locks_free_lock(conflock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5930 | return status; |
| 5931 | } |
| 5932 | |
| 5933 | /* |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 5934 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, |
| 5935 | * so we do a temporary open here just to get an open file to pass to |
| 5936 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an |
| 5937 | * inode operation.) |
| 5938 | */ |
Al Viro | 04da6e9 | 2012-04-13 00:00:04 -0400 | [diff] [blame] | 5939 | static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 5940 | { |
| 5941 | struct file *file; |
Al Viro | 04da6e9 | 2012-04-13 00:00:04 -0400 | [diff] [blame] | 5942 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
| 5943 | if (!err) { |
| 5944 | err = nfserrno(vfs_test_lock(file, lock)); |
Christoph Hellwig | fd89145 | 2015-04-28 15:41:16 +0200 | [diff] [blame] | 5945 | fput(file); |
Al Viro | 04da6e9 | 2012-04-13 00:00:04 -0400 | [diff] [blame] | 5946 | } |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 5947 | return err; |
| 5948 | } |
| 5949 | |
| 5950 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5951 | * LOCKT operation |
| 5952 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 5953 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 5954 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 5955 | struct nfsd4_lockt *lockt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5956 | { |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 5957 | struct file_lock *file_lock = NULL; |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 5958 | struct nfs4_lockowner *lo = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 5959 | __be32 status; |
Stanislav Kinsbursky | 7f2210f | 2012-11-14 18:21:05 +0300 | [diff] [blame] | 5960 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5961 | |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 5962 | if (locks_in_grace(SVC_NET(rqstp))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5963 | return nfserr_grace; |
| 5964 | |
| 5965 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) |
| 5966 | return nfserr_inval; |
| 5967 | |
J. Bruce Fields | 9b2ef62 | 2012-12-03 17:24:41 -0500 | [diff] [blame] | 5968 | if (!nfsd4_has_session(cstate)) { |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 5969 | status = lookup_clientid(&lockt->lt_clientid, cstate, nn); |
J. Bruce Fields | 9b2ef62 | 2012-12-03 17:24:41 -0500 | [diff] [blame] | 5970 | if (status) |
| 5971 | goto out; |
| 5972 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5973 | |
J. Bruce Fields | 75c096f | 2011-08-15 18:39:32 -0400 | [diff] [blame] | 5974 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5975 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5976 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 5977 | file_lock = locks_alloc_lock(); |
| 5978 | if (!file_lock) { |
| 5979 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); |
| 5980 | status = nfserr_jukebox; |
| 5981 | goto out; |
| 5982 | } |
Kinglong Mee | 6cd9066 | 2014-08-15 08:02:55 +0800 | [diff] [blame] | 5983 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5984 | switch (lockt->lt_type) { |
| 5985 | case NFS4_READ_LT: |
| 5986 | case NFS4_READW_LT: |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 5987 | file_lock->fl_type = F_RDLCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5988 | break; |
| 5989 | case NFS4_WRITE_LT: |
| 5990 | case NFS4_WRITEW_LT: |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 5991 | file_lock->fl_type = F_WRLCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5992 | break; |
| 5993 | default: |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 5994 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5995 | status = nfserr_inval; |
| 5996 | goto out; |
| 5997 | } |
| 5998 | |
Kinglong Mee | c862399 | 2015-07-13 17:35:37 +0800 | [diff] [blame] | 5999 | lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 6000 | if (lo) |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6001 | file_lock->fl_owner = (fl_owner_t)lo; |
| 6002 | file_lock->fl_pid = current->tgid; |
| 6003 | file_lock->fl_flags = FL_POSIX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6004 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6005 | file_lock->fl_start = lockt->lt_offset; |
| 6006 | file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6007 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6008 | nfs4_transform_lock_offset(file_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6009 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6010 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
Al Viro | 04da6e9 | 2012-04-13 00:00:04 -0400 | [diff] [blame] | 6011 | if (status) |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 6012 | goto out; |
Al Viro | 04da6e9 | 2012-04-13 00:00:04 -0400 | [diff] [blame] | 6013 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6014 | if (file_lock->fl_type != F_UNLCK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6015 | status = nfserr_denied; |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6016 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6017 | } |
| 6018 | out: |
Jeff Layton | 5db1c03 | 2014-07-29 21:34:28 -0400 | [diff] [blame] | 6019 | if (lo) |
| 6020 | nfs4_put_stateowner(&lo->lo_owner); |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6021 | if (file_lock) |
| 6022 | locks_free_lock(file_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6023 | return status; |
| 6024 | } |
| 6025 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 6026 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 6027 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 6028 | struct nfsd4_locku *locku) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6029 | { |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 6030 | struct nfs4_ol_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6031 | struct file *filp = NULL; |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6032 | struct file_lock *file_lock = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 6033 | __be32 status; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 6034 | int err; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 6035 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| 6036 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6037 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
| 6038 | (long long) locku->lu_offset, |
| 6039 | (long long) locku->lu_length); |
| 6040 | |
| 6041 | if (check_lock_length(locku->lu_offset, locku->lu_length)) |
| 6042 | return nfserr_inval; |
| 6043 | |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 6044 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 6045 | &locku->lu_stateid, NFS4_LOCK_STID, |
| 6046 | &stp, nn); |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 6047 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6048 | goto out; |
Trond Myklebust | 11b9164 | 2014-07-29 21:34:08 -0400 | [diff] [blame] | 6049 | filp = find_any_file(stp->st_stid.sc_file); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 6050 | if (!filp) { |
| 6051 | status = nfserr_lock_range; |
Trond Myklebust | 858cc57 | 2014-07-29 21:34:16 -0400 | [diff] [blame] | 6052 | goto put_stateid; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 6053 | } |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6054 | file_lock = locks_alloc_lock(); |
| 6055 | if (!file_lock) { |
| 6056 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); |
| 6057 | status = nfserr_jukebox; |
Trond Myklebust | de18643 | 2014-07-10 14:07:26 -0400 | [diff] [blame] | 6058 | goto fput; |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6059 | } |
Kinglong Mee | 6cd9066 | 2014-08-15 08:02:55 +0800 | [diff] [blame] | 6060 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6061 | file_lock->fl_type = F_UNLCK; |
Kinglong Mee | aef9583 | 2014-08-22 10:18:44 -0400 | [diff] [blame] | 6062 | file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6063 | file_lock->fl_pid = current->tgid; |
| 6064 | file_lock->fl_file = filp; |
| 6065 | file_lock->fl_flags = FL_POSIX; |
| 6066 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
| 6067 | file_lock->fl_start = locku->lu_offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6068 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6069 | file_lock->fl_end = last_byte_offset(locku->lu_offset, |
| 6070 | locku->lu_length); |
| 6071 | nfs4_transform_lock_offset(file_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6072 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6073 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 6074 | if (err) { |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 6075 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6076 | goto out_nfserr; |
| 6077 | } |
Jeff Layton | 9767feb | 2015-10-01 09:05:50 -0400 | [diff] [blame] | 6078 | nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); |
Trond Myklebust | de18643 | 2014-07-10 14:07:26 -0400 | [diff] [blame] | 6079 | fput: |
| 6080 | fput(filp); |
Trond Myklebust | 858cc57 | 2014-07-29 21:34:16 -0400 | [diff] [blame] | 6081 | put_stateid: |
Oleg Drokin | feb9dad | 2016-06-14 23:28:04 -0400 | [diff] [blame] | 6082 | mutex_unlock(&stp->st_mutex); |
Trond Myklebust | 858cc57 | 2014-07-29 21:34:16 -0400 | [diff] [blame] | 6083 | nfs4_put_stid(&stp->st_stid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6084 | out: |
J. Bruce Fields | 9411b1d | 2013-04-01 16:37:12 -0400 | [diff] [blame] | 6085 | nfsd4_bump_seqid(cstate, status); |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 6086 | if (file_lock) |
| 6087 | locks_free_lock(file_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6088 | return status; |
| 6089 | |
| 6090 | out_nfserr: |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 6091 | status = nfserrno(err); |
Trond Myklebust | de18643 | 2014-07-10 14:07:26 -0400 | [diff] [blame] | 6092 | goto fput; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6093 | } |
| 6094 | |
| 6095 | /* |
| 6096 | * returns |
Jeff Layton | f9c00c3 | 2014-07-23 16:17:41 -0400 | [diff] [blame] | 6097 | * true: locks held by lockowner |
| 6098 | * false: no locks held by lockowner |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6099 | */ |
Jeff Layton | f9c00c3 | 2014-07-23 16:17:41 -0400 | [diff] [blame] | 6100 | static bool |
| 6101 | check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6102 | { |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 6103 | struct file_lock *fl; |
Jeff Layton | f9c00c3 | 2014-07-23 16:17:41 -0400 | [diff] [blame] | 6104 | int status = false; |
| 6105 | struct file *filp = find_any_file(fp); |
| 6106 | struct inode *inode; |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 6107 | struct file_lock_context *flctx; |
Jeff Layton | f9c00c3 | 2014-07-23 16:17:41 -0400 | [diff] [blame] | 6108 | |
| 6109 | if (!filp) { |
| 6110 | /* Any valid lock stateid should have some sort of access */ |
| 6111 | WARN_ON_ONCE(1); |
| 6112 | return status; |
| 6113 | } |
| 6114 | |
| 6115 | inode = file_inode(filp); |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 6116 | flctx = inode->i_flctx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6117 | |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 6118 | if (flctx && !list_empty_careful(&flctx->flc_posix)) { |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 6119 | spin_lock(&flctx->flc_lock); |
Jeff Layton | bd61e0a | 2015-01-16 15:05:55 -0500 | [diff] [blame] | 6120 | list_for_each_entry(fl, &flctx->flc_posix, fl_list) { |
| 6121 | if (fl->fl_owner == (fl_owner_t)lowner) { |
| 6122 | status = true; |
| 6123 | break; |
| 6124 | } |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 6125 | } |
Jeff Layton | 6109c85 | 2015-01-16 15:05:57 -0500 | [diff] [blame] | 6126 | spin_unlock(&flctx->flc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6127 | } |
Jeff Layton | f9c00c3 | 2014-07-23 16:17:41 -0400 | [diff] [blame] | 6128 | fput(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6129 | return status; |
| 6130 | } |
| 6131 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 6132 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 6133 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
| 6134 | struct nfsd4_compound_state *cstate, |
| 6135 | struct nfsd4_release_lockowner *rlockowner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6136 | { |
| 6137 | clientid_t *clid = &rlockowner->rl_clientid; |
Jeff Layton | 882e9d2 | 2014-07-29 21:34:37 -0400 | [diff] [blame] | 6138 | struct nfs4_stateowner *sop; |
| 6139 | struct nfs4_lockowner *lo = NULL; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 6140 | struct nfs4_ol_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6141 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 6142 | unsigned int hashval = ownerstr_hashval(owner); |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 6143 | __be32 status; |
Stanislav Kinsbursky | 7f2210f | 2012-11-14 18:21:05 +0300 | [diff] [blame] | 6144 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Trond Myklebust | c58c661 | 2014-07-29 21:34:35 -0400 | [diff] [blame] | 6145 | struct nfs4_client *clp; |
Chuck Lever | 8858481 | 2016-07-13 16:40:14 -0400 | [diff] [blame] | 6146 | LIST_HEAD (reaplist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6147 | |
| 6148 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", |
| 6149 | clid->cl_boot, clid->cl_id); |
| 6150 | |
Jeff Layton | 4b24ca7 | 2014-06-30 11:48:44 -0400 | [diff] [blame] | 6151 | status = lookup_clientid(clid, cstate, nn); |
J. Bruce Fields | 9b2ef62 | 2012-12-03 17:24:41 -0500 | [diff] [blame] | 6152 | if (status) |
Trond Myklebust | 51f5e78 | 2014-07-30 08:27:27 -0400 | [diff] [blame] | 6153 | return status; |
J. Bruce Fields | 9b2ef62 | 2012-12-03 17:24:41 -0500 | [diff] [blame] | 6154 | |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 6155 | clp = cstate->clp; |
Jeff Layton | fd44907 | 2014-06-30 11:48:41 -0400 | [diff] [blame] | 6156 | /* Find the matching lock stateowner */ |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 6157 | spin_lock(&clp->cl_lock); |
Jeff Layton | 882e9d2 | 2014-07-29 21:34:37 -0400 | [diff] [blame] | 6158 | list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], |
Trond Myklebust | d4f0489 | 2014-07-29 21:34:36 -0400 | [diff] [blame] | 6159 | so_strhash) { |
Jeff Layton | 882e9d2 | 2014-07-29 21:34:37 -0400 | [diff] [blame] | 6160 | |
| 6161 | if (sop->so_is_open_owner || !same_owner_str(sop, owner)) |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 6162 | continue; |
Jeff Layton | fd44907 | 2014-06-30 11:48:41 -0400 | [diff] [blame] | 6163 | |
Jeff Layton | 882e9d2 | 2014-07-29 21:34:37 -0400 | [diff] [blame] | 6164 | /* see if there are still any locks associated with it */ |
| 6165 | lo = lockowner(sop); |
| 6166 | list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { |
| 6167 | if (check_for_locks(stp->st_stid.sc_file, lo)) { |
| 6168 | status = nfserr_locks_held; |
| 6169 | spin_unlock(&clp->cl_lock); |
Trond Myklebust | 51f5e78 | 2014-07-30 08:27:27 -0400 | [diff] [blame] | 6170 | return status; |
Jeff Layton | 882e9d2 | 2014-07-29 21:34:37 -0400 | [diff] [blame] | 6171 | } |
Jeff Layton | 5adfd88 | 2014-07-29 21:34:31 -0400 | [diff] [blame] | 6172 | } |
Jeff Layton | 882e9d2 | 2014-07-29 21:34:37 -0400 | [diff] [blame] | 6173 | |
Kinglong Mee | b5971af | 2014-08-22 10:18:43 -0400 | [diff] [blame] | 6174 | nfs4_get_stateowner(sop); |
Jeff Layton | 882e9d2 | 2014-07-29 21:34:37 -0400 | [diff] [blame] | 6175 | break; |
Jeff Layton | fd44907 | 2014-06-30 11:48:41 -0400 | [diff] [blame] | 6176 | } |
Chuck Lever | 8858481 | 2016-07-13 16:40:14 -0400 | [diff] [blame] | 6177 | if (!lo) { |
| 6178 | spin_unlock(&clp->cl_lock); |
| 6179 | return status; |
| 6180 | } |
| 6181 | |
| 6182 | unhash_lockowner_locked(lo); |
| 6183 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
| 6184 | stp = list_first_entry(&lo->lo_owner.so_stateids, |
| 6185 | struct nfs4_ol_stateid, |
| 6186 | st_perstateowner); |
| 6187 | WARN_ON(!unhash_lock_stateid(stp)); |
| 6188 | put_ol_stateid_locked(stp, &reaplist); |
| 6189 | } |
Trond Myklebust | c58c661 | 2014-07-29 21:34:35 -0400 | [diff] [blame] | 6190 | spin_unlock(&clp->cl_lock); |
Chuck Lever | 8858481 | 2016-07-13 16:40:14 -0400 | [diff] [blame] | 6191 | free_ol_stateid_reaplist(&reaplist); |
| 6192 | nfs4_put_stateowner(&lo->lo_owner); |
| 6193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6194 | return status; |
| 6195 | } |
| 6196 | |
| 6197 | static inline struct nfs4_client_reclaim * |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 6198 | alloc_reclaim(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6199 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 6200 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6201 | } |
| 6202 | |
Jeff Layton | 0ce0c2b | 2012-11-12 15:00:55 -0500 | [diff] [blame] | 6203 | bool |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 6204 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 6205 | { |
Jeff Layton | 0ce0c2b | 2012-11-12 15:00:55 -0500 | [diff] [blame] | 6206 | struct nfs4_client_reclaim *crp; |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 6207 | |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 6208 | crp = nfsd4_find_reclaim_client(name, nn); |
Jeff Layton | 0ce0c2b | 2012-11-12 15:00:55 -0500 | [diff] [blame] | 6209 | return (crp && crp->cr_clp); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 6210 | } |
| 6211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6212 | /* |
| 6213 | * failure => all reset bets are off, nfserr_no_grace... |
| 6214 | */ |
Jeff Layton | 772a9bb | 2012-11-12 15:00:54 -0500 | [diff] [blame] | 6215 | struct nfs4_client_reclaim * |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 6216 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6217 | { |
| 6218 | unsigned int strhashval; |
Jeff Layton | 772a9bb | 2012-11-12 15:00:54 -0500 | [diff] [blame] | 6219 | struct nfs4_client_reclaim *crp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6220 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 6221 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
| 6222 | crp = alloc_reclaim(); |
Jeff Layton | 772a9bb | 2012-11-12 15:00:54 -0500 | [diff] [blame] | 6223 | if (crp) { |
| 6224 | strhashval = clientstr_hashval(name); |
| 6225 | INIT_LIST_HEAD(&crp->cr_strhash); |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 6226 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
Jeff Layton | 772a9bb | 2012-11-12 15:00:54 -0500 | [diff] [blame] | 6227 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
Jeff Layton | 0ce0c2b | 2012-11-12 15:00:55 -0500 | [diff] [blame] | 6228 | crp->cr_clp = NULL; |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 6229 | nn->reclaim_str_hashtbl_size++; |
Jeff Layton | 772a9bb | 2012-11-12 15:00:54 -0500 | [diff] [blame] | 6230 | } |
| 6231 | return crp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6232 | } |
| 6233 | |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 6234 | void |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 6235 | nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) |
Jeff Layton | ce30e53 | 2012-11-12 15:00:53 -0500 | [diff] [blame] | 6236 | { |
| 6237 | list_del(&crp->cr_strhash); |
| 6238 | kfree(crp); |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 6239 | nn->reclaim_str_hashtbl_size--; |
Jeff Layton | ce30e53 | 2012-11-12 15:00:53 -0500 | [diff] [blame] | 6240 | } |
| 6241 | |
| 6242 | void |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 6243 | nfs4_release_reclaim(struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6244 | { |
| 6245 | struct nfs4_client_reclaim *crp = NULL; |
| 6246 | int i; |
| 6247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6248 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 6249 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
| 6250 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6251 | struct nfs4_client_reclaim, cr_strhash); |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 6252 | nfs4_remove_reclaim_record(crp, nn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6253 | } |
| 6254 | } |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 6255 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6256 | } |
| 6257 | |
| 6258 | /* |
| 6259 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 6260 | struct nfs4_client_reclaim * |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 6261 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6262 | { |
| 6263 | unsigned int strhashval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6264 | struct nfs4_client_reclaim *crp = NULL; |
| 6265 | |
Jeff Layton | 278c931 | 2012-11-12 15:00:52 -0500 | [diff] [blame] | 6266 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6267 | |
Jeff Layton | 278c931 | 2012-11-12 15:00:52 -0500 | [diff] [blame] | 6268 | strhashval = clientstr_hashval(recdir); |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 6269 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
Jeff Layton | 278c931 | 2012-11-12 15:00:52 -0500 | [diff] [blame] | 6270 | if (same_name(crp->cr_recdir, recdir)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6271 | return crp; |
| 6272 | } |
| 6273 | } |
| 6274 | return NULL; |
| 6275 | } |
| 6276 | |
| 6277 | /* |
| 6278 | * Called from OPEN. Look for clientid in reclaim list. |
| 6279 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 6280 | __be32 |
Trond Myklebust | 0fe492d | 2014-06-30 11:48:47 -0400 | [diff] [blame] | 6281 | nfs4_check_open_reclaim(clientid_t *clid, |
| 6282 | struct nfsd4_compound_state *cstate, |
| 6283 | struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6284 | { |
Trond Myklebust | 0fe492d | 2014-06-30 11:48:47 -0400 | [diff] [blame] | 6285 | __be32 status; |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 6286 | |
| 6287 | /* find clientid in conf_id_hashtbl */ |
Trond Myklebust | 0fe492d | 2014-06-30 11:48:47 -0400 | [diff] [blame] | 6288 | status = lookup_clientid(clid, cstate, nn); |
| 6289 | if (status) |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 6290 | return nfserr_reclaim_bad; |
| 6291 | |
Jeff Layton | 3b3e7b7 | 2014-09-12 16:40:22 -0400 | [diff] [blame] | 6292 | if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags)) |
| 6293 | return nfserr_no_grace; |
| 6294 | |
Trond Myklebust | 0fe492d | 2014-06-30 11:48:47 -0400 | [diff] [blame] | 6295 | if (nfsd4_client_record_check(cstate->clp)) |
| 6296 | return nfserr_reclaim_bad; |
| 6297 | |
| 6298 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6299 | } |
| 6300 | |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 6301 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
Jeff Layton | 016200c | 2014-07-30 08:27:21 -0400 | [diff] [blame] | 6302 | static inline void |
| 6303 | put_client(struct nfs4_client *clp) |
| 6304 | { |
| 6305 | atomic_dec(&clp->cl_refcount); |
| 6306 | } |
| 6307 | |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6308 | static struct nfs4_client * |
| 6309 | nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
| 6310 | { |
| 6311 | struct nfs4_client *clp; |
| 6312 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6313 | nfsd_net_id); |
| 6314 | |
| 6315 | if (!nfsd_netns_ready(nn)) |
| 6316 | return NULL; |
| 6317 | |
| 6318 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { |
| 6319 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) |
| 6320 | return clp; |
| 6321 | } |
| 6322 | return NULL; |
| 6323 | } |
| 6324 | |
Jeff Layton | 7ec0e36 | 2014-07-30 08:27:17 -0400 | [diff] [blame] | 6325 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6326 | nfsd_inject_print_clients(void) |
Jeff Layton | 7ec0e36 | 2014-07-30 08:27:17 -0400 | [diff] [blame] | 6327 | { |
| 6328 | struct nfs4_client *clp; |
| 6329 | u64 count = 0; |
| 6330 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6331 | nfsd_net_id); |
| 6332 | char buf[INET6_ADDRSTRLEN]; |
| 6333 | |
| 6334 | if (!nfsd_netns_ready(nn)) |
| 6335 | return 0; |
| 6336 | |
| 6337 | spin_lock(&nn->client_lock); |
| 6338 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { |
| 6339 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
| 6340 | pr_info("NFS Client: %s\n", buf); |
| 6341 | ++count; |
| 6342 | } |
| 6343 | spin_unlock(&nn->client_lock); |
| 6344 | |
| 6345 | return count; |
| 6346 | } |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 6347 | |
Jeff Layton | a0926d1 | 2014-07-30 08:27:18 -0400 | [diff] [blame] | 6348 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6349 | nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) |
Jeff Layton | a0926d1 | 2014-07-30 08:27:18 -0400 | [diff] [blame] | 6350 | { |
| 6351 | u64 count = 0; |
| 6352 | struct nfs4_client *clp; |
| 6353 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6354 | nfsd_net_id); |
| 6355 | |
| 6356 | if (!nfsd_netns_ready(nn)) |
| 6357 | return count; |
| 6358 | |
| 6359 | spin_lock(&nn->client_lock); |
| 6360 | clp = nfsd_find_client(addr, addr_size); |
| 6361 | if (clp) { |
| 6362 | if (mark_client_expired_locked(clp) == nfs_ok) |
| 6363 | ++count; |
| 6364 | else |
| 6365 | clp = NULL; |
| 6366 | } |
| 6367 | spin_unlock(&nn->client_lock); |
| 6368 | |
| 6369 | if (clp) |
| 6370 | expire_client(clp); |
| 6371 | |
| 6372 | return count; |
| 6373 | } |
| 6374 | |
Jeff Layton | 69fc9ed | 2014-07-30 08:27:19 -0400 | [diff] [blame] | 6375 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6376 | nfsd_inject_forget_clients(u64 max) |
Jeff Layton | 69fc9ed | 2014-07-30 08:27:19 -0400 | [diff] [blame] | 6377 | { |
| 6378 | u64 count = 0; |
| 6379 | struct nfs4_client *clp, *next; |
| 6380 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6381 | nfsd_net_id); |
| 6382 | LIST_HEAD(reaplist); |
| 6383 | |
| 6384 | if (!nfsd_netns_ready(nn)) |
| 6385 | return count; |
| 6386 | |
| 6387 | spin_lock(&nn->client_lock); |
| 6388 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
| 6389 | if (mark_client_expired_locked(clp) == nfs_ok) { |
| 6390 | list_add(&clp->cl_lru, &reaplist); |
| 6391 | if (max != 0 && ++count >= max) |
| 6392 | break; |
| 6393 | } |
| 6394 | } |
| 6395 | spin_unlock(&nn->client_lock); |
| 6396 | |
| 6397 | list_for_each_entry_safe(clp, next, &reaplist, cl_lru) |
| 6398 | expire_client(clp); |
| 6399 | |
| 6400 | return count; |
| 6401 | } |
| 6402 | |
Bryan Schumaker | 184c184 | 2012-11-29 11:40:44 -0500 | [diff] [blame] | 6403 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
| 6404 | const char *type) |
| 6405 | { |
| 6406 | char buf[INET6_ADDRSTRLEN]; |
Bryan Schumaker | 0a5c33e | 2012-12-07 16:17:28 -0500 | [diff] [blame] | 6407 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
Bryan Schumaker | 184c184 | 2012-11-29 11:40:44 -0500 | [diff] [blame] | 6408 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
| 6409 | } |
| 6410 | |
Jeff Layton | 016200c | 2014-07-30 08:27:21 -0400 | [diff] [blame] | 6411 | static void |
| 6412 | nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, |
| 6413 | struct list_head *collect) |
| 6414 | { |
| 6415 | struct nfs4_client *clp = lst->st_stid.sc_client; |
| 6416 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6417 | nfsd_net_id); |
| 6418 | |
| 6419 | if (!collect) |
| 6420 | return; |
| 6421 | |
| 6422 | lockdep_assert_held(&nn->client_lock); |
| 6423 | atomic_inc(&clp->cl_refcount); |
| 6424 | list_add(&lst->st_locks, collect); |
| 6425 | } |
| 6426 | |
Trond Myklebust | 3c87b9b | 2014-06-30 11:48:38 -0400 | [diff] [blame] | 6427 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, |
Jeff Layton | 3738d50 | 2014-07-30 08:27:20 -0400 | [diff] [blame] | 6428 | struct list_head *collect, |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 6429 | bool (*func)(struct nfs4_ol_stateid *)) |
Bryan Schumaker | fc29171 | 2012-11-29 11:40:40 -0500 | [diff] [blame] | 6430 | { |
| 6431 | struct nfs4_openowner *oop; |
Bryan Schumaker | fc29171 | 2012-11-29 11:40:40 -0500 | [diff] [blame] | 6432 | struct nfs4_ol_stateid *stp, *st_next; |
Trond Myklebust | 3c87b9b | 2014-06-30 11:48:38 -0400 | [diff] [blame] | 6433 | struct nfs4_ol_stateid *lst, *lst_next; |
Bryan Schumaker | fc29171 | 2012-11-29 11:40:40 -0500 | [diff] [blame] | 6434 | u64 count = 0; |
| 6435 | |
Jeff Layton | 016200c | 2014-07-30 08:27:21 -0400 | [diff] [blame] | 6436 | spin_lock(&clp->cl_lock); |
Bryan Schumaker | fc29171 | 2012-11-29 11:40:40 -0500 | [diff] [blame] | 6437 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
Trond Myklebust | 3c87b9b | 2014-06-30 11:48:38 -0400 | [diff] [blame] | 6438 | list_for_each_entry_safe(stp, st_next, |
| 6439 | &oop->oo_owner.so_stateids, st_perstateowner) { |
| 6440 | list_for_each_entry_safe(lst, lst_next, |
| 6441 | &stp->st_locks, st_locks) { |
Jeff Layton | 3738d50 | 2014-07-30 08:27:20 -0400 | [diff] [blame] | 6442 | if (func) { |
Jeff Layton | e856873 | 2015-08-24 12:41:47 -0400 | [diff] [blame] | 6443 | if (func(lst)) |
| 6444 | nfsd_inject_add_lock_to_list(lst, |
| 6445 | collect); |
Jeff Layton | 3738d50 | 2014-07-30 08:27:20 -0400 | [diff] [blame] | 6446 | } |
Jeff Layton | 016200c | 2014-07-30 08:27:21 -0400 | [diff] [blame] | 6447 | ++count; |
| 6448 | /* |
| 6449 | * Despite the fact that these functions deal |
| 6450 | * with 64-bit integers for "count", we must |
| 6451 | * ensure that it doesn't blow up the |
| 6452 | * clp->cl_refcount. Throw a warning if we |
| 6453 | * start to approach INT_MAX here. |
| 6454 | */ |
| 6455 | WARN_ON_ONCE(count == (INT_MAX / 2)); |
| 6456 | if (count == max) |
| 6457 | goto out; |
Bryan Schumaker | fc29171 | 2012-11-29 11:40:40 -0500 | [diff] [blame] | 6458 | } |
| 6459 | } |
| 6460 | } |
Jeff Layton | 016200c | 2014-07-30 08:27:21 -0400 | [diff] [blame] | 6461 | out: |
| 6462 | spin_unlock(&clp->cl_lock); |
Bryan Schumaker | fc29171 | 2012-11-29 11:40:40 -0500 | [diff] [blame] | 6463 | |
| 6464 | return count; |
| 6465 | } |
| 6466 | |
Jeff Layton | 016200c | 2014-07-30 08:27:21 -0400 | [diff] [blame] | 6467 | static u64 |
| 6468 | nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, |
| 6469 | u64 max) |
Bryan Schumaker | fc29171 | 2012-11-29 11:40:40 -0500 | [diff] [blame] | 6470 | { |
Jeff Layton | 016200c | 2014-07-30 08:27:21 -0400 | [diff] [blame] | 6471 | return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); |
Bryan Schumaker | fc29171 | 2012-11-29 11:40:40 -0500 | [diff] [blame] | 6472 | } |
| 6473 | |
Jeff Layton | 016200c | 2014-07-30 08:27:21 -0400 | [diff] [blame] | 6474 | static u64 |
| 6475 | nfsd_print_client_locks(struct nfs4_client *clp) |
Bryan Schumaker | 184c184 | 2012-11-29 11:40:44 -0500 | [diff] [blame] | 6476 | { |
Jeff Layton | 016200c | 2014-07-30 08:27:21 -0400 | [diff] [blame] | 6477 | u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); |
Bryan Schumaker | 184c184 | 2012-11-29 11:40:44 -0500 | [diff] [blame] | 6478 | nfsd_print_count(clp, count, "locked files"); |
| 6479 | return count; |
| 6480 | } |
| 6481 | |
Jeff Layton | 016200c | 2014-07-30 08:27:21 -0400 | [diff] [blame] | 6482 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6483 | nfsd_inject_print_locks(void) |
Jeff Layton | 016200c | 2014-07-30 08:27:21 -0400 | [diff] [blame] | 6484 | { |
| 6485 | struct nfs4_client *clp; |
| 6486 | u64 count = 0; |
| 6487 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6488 | nfsd_net_id); |
| 6489 | |
| 6490 | if (!nfsd_netns_ready(nn)) |
| 6491 | return 0; |
| 6492 | |
| 6493 | spin_lock(&nn->client_lock); |
| 6494 | list_for_each_entry(clp, &nn->client_lru, cl_lru) |
| 6495 | count += nfsd_print_client_locks(clp); |
| 6496 | spin_unlock(&nn->client_lock); |
| 6497 | |
| 6498 | return count; |
| 6499 | } |
| 6500 | |
| 6501 | static void |
| 6502 | nfsd_reap_locks(struct list_head *reaplist) |
| 6503 | { |
| 6504 | struct nfs4_client *clp; |
| 6505 | struct nfs4_ol_stateid *stp, *next; |
| 6506 | |
| 6507 | list_for_each_entry_safe(stp, next, reaplist, st_locks) { |
| 6508 | list_del_init(&stp->st_locks); |
| 6509 | clp = stp->st_stid.sc_client; |
| 6510 | nfs4_put_stid(&stp->st_stid); |
| 6511 | put_client(clp); |
| 6512 | } |
| 6513 | } |
| 6514 | |
| 6515 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6516 | nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) |
Jeff Layton | 016200c | 2014-07-30 08:27:21 -0400 | [diff] [blame] | 6517 | { |
| 6518 | unsigned int count = 0; |
| 6519 | struct nfs4_client *clp; |
| 6520 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6521 | nfsd_net_id); |
| 6522 | LIST_HEAD(reaplist); |
| 6523 | |
| 6524 | if (!nfsd_netns_ready(nn)) |
| 6525 | return count; |
| 6526 | |
| 6527 | spin_lock(&nn->client_lock); |
| 6528 | clp = nfsd_find_client(addr, addr_size); |
| 6529 | if (clp) |
| 6530 | count = nfsd_collect_client_locks(clp, &reaplist, 0); |
| 6531 | spin_unlock(&nn->client_lock); |
| 6532 | nfsd_reap_locks(&reaplist); |
| 6533 | return count; |
| 6534 | } |
| 6535 | |
| 6536 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6537 | nfsd_inject_forget_locks(u64 max) |
Jeff Layton | 016200c | 2014-07-30 08:27:21 -0400 | [diff] [blame] | 6538 | { |
| 6539 | u64 count = 0; |
| 6540 | struct nfs4_client *clp; |
| 6541 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6542 | nfsd_net_id); |
| 6543 | LIST_HEAD(reaplist); |
| 6544 | |
| 6545 | if (!nfsd_netns_ready(nn)) |
| 6546 | return count; |
| 6547 | |
| 6548 | spin_lock(&nn->client_lock); |
| 6549 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { |
| 6550 | count += nfsd_collect_client_locks(clp, &reaplist, max - count); |
| 6551 | if (max != 0 && count >= max) |
| 6552 | break; |
| 6553 | } |
| 6554 | spin_unlock(&nn->client_lock); |
| 6555 | nfsd_reap_locks(&reaplist); |
| 6556 | return count; |
| 6557 | } |
| 6558 | |
Jeff Layton | 82e05ef | 2014-07-30 08:27:22 -0400 | [diff] [blame] | 6559 | static u64 |
| 6560 | nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, |
| 6561 | struct list_head *collect, |
| 6562 | void (*func)(struct nfs4_openowner *)) |
Bryan Schumaker | 4dbdbda | 2012-11-29 11:40:41 -0500 | [diff] [blame] | 6563 | { |
| 6564 | struct nfs4_openowner *oop, *next; |
Jeff Layton | 82e05ef | 2014-07-30 08:27:22 -0400 | [diff] [blame] | 6565 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6566 | nfsd_net_id); |
Bryan Schumaker | 4dbdbda | 2012-11-29 11:40:41 -0500 | [diff] [blame] | 6567 | u64 count = 0; |
| 6568 | |
Jeff Layton | 82e05ef | 2014-07-30 08:27:22 -0400 | [diff] [blame] | 6569 | lockdep_assert_held(&nn->client_lock); |
| 6570 | |
| 6571 | spin_lock(&clp->cl_lock); |
Bryan Schumaker | 4dbdbda | 2012-11-29 11:40:41 -0500 | [diff] [blame] | 6572 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
Jeff Layton | 82e05ef | 2014-07-30 08:27:22 -0400 | [diff] [blame] | 6573 | if (func) { |
Bryan Schumaker | 4dbdbda | 2012-11-29 11:40:41 -0500 | [diff] [blame] | 6574 | func(oop); |
Jeff Layton | 82e05ef | 2014-07-30 08:27:22 -0400 | [diff] [blame] | 6575 | if (collect) { |
| 6576 | atomic_inc(&clp->cl_refcount); |
| 6577 | list_add(&oop->oo_perclient, collect); |
| 6578 | } |
| 6579 | } |
| 6580 | ++count; |
| 6581 | /* |
| 6582 | * Despite the fact that these functions deal with |
| 6583 | * 64-bit integers for "count", we must ensure that |
| 6584 | * it doesn't blow up the clp->cl_refcount. Throw a |
| 6585 | * warning if we start to approach INT_MAX here. |
| 6586 | */ |
| 6587 | WARN_ON_ONCE(count == (INT_MAX / 2)); |
| 6588 | if (count == max) |
Bryan Schumaker | 4dbdbda | 2012-11-29 11:40:41 -0500 | [diff] [blame] | 6589 | break; |
| 6590 | } |
Jeff Layton | 82e05ef | 2014-07-30 08:27:22 -0400 | [diff] [blame] | 6591 | spin_unlock(&clp->cl_lock); |
Bryan Schumaker | 4dbdbda | 2012-11-29 11:40:41 -0500 | [diff] [blame] | 6592 | |
| 6593 | return count; |
| 6594 | } |
| 6595 | |
Jeff Layton | 82e05ef | 2014-07-30 08:27:22 -0400 | [diff] [blame] | 6596 | static u64 |
| 6597 | nfsd_print_client_openowners(struct nfs4_client *clp) |
Bryan Schumaker | 4dbdbda | 2012-11-29 11:40:41 -0500 | [diff] [blame] | 6598 | { |
Jeff Layton | 82e05ef | 2014-07-30 08:27:22 -0400 | [diff] [blame] | 6599 | u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); |
| 6600 | |
| 6601 | nfsd_print_count(clp, count, "openowners"); |
| 6602 | return count; |
Bryan Schumaker | 4dbdbda | 2012-11-29 11:40:41 -0500 | [diff] [blame] | 6603 | } |
| 6604 | |
Jeff Layton | 82e05ef | 2014-07-30 08:27:22 -0400 | [diff] [blame] | 6605 | static u64 |
| 6606 | nfsd_collect_client_openowners(struct nfs4_client *clp, |
| 6607 | struct list_head *collect, u64 max) |
Bryan Schumaker | 184c184 | 2012-11-29 11:40:44 -0500 | [diff] [blame] | 6608 | { |
Jeff Layton | 82e05ef | 2014-07-30 08:27:22 -0400 | [diff] [blame] | 6609 | return nfsd_foreach_client_openowner(clp, max, collect, |
| 6610 | unhash_openowner_locked); |
| 6611 | } |
| 6612 | |
| 6613 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6614 | nfsd_inject_print_openowners(void) |
Jeff Layton | 82e05ef | 2014-07-30 08:27:22 -0400 | [diff] [blame] | 6615 | { |
| 6616 | struct nfs4_client *clp; |
| 6617 | u64 count = 0; |
| 6618 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6619 | nfsd_net_id); |
| 6620 | |
| 6621 | if (!nfsd_netns_ready(nn)) |
| 6622 | return 0; |
| 6623 | |
| 6624 | spin_lock(&nn->client_lock); |
| 6625 | list_for_each_entry(clp, &nn->client_lru, cl_lru) |
| 6626 | count += nfsd_print_client_openowners(clp); |
| 6627 | spin_unlock(&nn->client_lock); |
| 6628 | |
| 6629 | return count; |
| 6630 | } |
| 6631 | |
| 6632 | static void |
| 6633 | nfsd_reap_openowners(struct list_head *reaplist) |
| 6634 | { |
| 6635 | struct nfs4_client *clp; |
| 6636 | struct nfs4_openowner *oop, *next; |
| 6637 | |
| 6638 | list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { |
| 6639 | list_del_init(&oop->oo_perclient); |
| 6640 | clp = oop->oo_owner.so_client; |
| 6641 | release_openowner(oop); |
| 6642 | put_client(clp); |
| 6643 | } |
| 6644 | } |
| 6645 | |
| 6646 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6647 | nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, |
| 6648 | size_t addr_size) |
Jeff Layton | 82e05ef | 2014-07-30 08:27:22 -0400 | [diff] [blame] | 6649 | { |
| 6650 | unsigned int count = 0; |
| 6651 | struct nfs4_client *clp; |
| 6652 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6653 | nfsd_net_id); |
| 6654 | LIST_HEAD(reaplist); |
| 6655 | |
| 6656 | if (!nfsd_netns_ready(nn)) |
| 6657 | return count; |
| 6658 | |
| 6659 | spin_lock(&nn->client_lock); |
| 6660 | clp = nfsd_find_client(addr, addr_size); |
| 6661 | if (clp) |
| 6662 | count = nfsd_collect_client_openowners(clp, &reaplist, 0); |
| 6663 | spin_unlock(&nn->client_lock); |
| 6664 | nfsd_reap_openowners(&reaplist); |
| 6665 | return count; |
| 6666 | } |
| 6667 | |
| 6668 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6669 | nfsd_inject_forget_openowners(u64 max) |
Jeff Layton | 82e05ef | 2014-07-30 08:27:22 -0400 | [diff] [blame] | 6670 | { |
| 6671 | u64 count = 0; |
| 6672 | struct nfs4_client *clp; |
| 6673 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6674 | nfsd_net_id); |
| 6675 | LIST_HEAD(reaplist); |
| 6676 | |
| 6677 | if (!nfsd_netns_ready(nn)) |
| 6678 | return count; |
| 6679 | |
| 6680 | spin_lock(&nn->client_lock); |
| 6681 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { |
| 6682 | count += nfsd_collect_client_openowners(clp, &reaplist, |
| 6683 | max - count); |
| 6684 | if (max != 0 && count >= max) |
| 6685 | break; |
| 6686 | } |
| 6687 | spin_unlock(&nn->client_lock); |
| 6688 | nfsd_reap_openowners(&reaplist); |
Bryan Schumaker | 184c184 | 2012-11-29 11:40:44 -0500 | [diff] [blame] | 6689 | return count; |
| 6690 | } |
| 6691 | |
Bryan Schumaker | 269de30 | 2012-11-29 11:40:42 -0500 | [diff] [blame] | 6692 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
| 6693 | struct list_head *victims) |
| 6694 | { |
| 6695 | struct nfs4_delegation *dp, *next; |
Jeff Layton | 98d5c7c | 2014-07-30 08:27:23 -0400 | [diff] [blame] | 6696 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6697 | nfsd_net_id); |
Bryan Schumaker | 269de30 | 2012-11-29 11:40:42 -0500 | [diff] [blame] | 6698 | u64 count = 0; |
| 6699 | |
Jeff Layton | 98d5c7c | 2014-07-30 08:27:23 -0400 | [diff] [blame] | 6700 | lockdep_assert_held(&nn->client_lock); |
| 6701 | |
| 6702 | spin_lock(&state_lock); |
Bryan Schumaker | 269de30 | 2012-11-29 11:40:42 -0500 | [diff] [blame] | 6703 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
Jeff Layton | dff1399 | 2014-07-08 14:02:49 -0400 | [diff] [blame] | 6704 | if (victims) { |
| 6705 | /* |
| 6706 | * It's not safe to mess with delegations that have a |
| 6707 | * non-zero dl_time. They might have already been broken |
| 6708 | * and could be processed by the laundromat outside of |
| 6709 | * the state_lock. Just leave them be. |
| 6710 | */ |
| 6711 | if (dp->dl_time != 0) |
| 6712 | continue; |
| 6713 | |
Jeff Layton | 98d5c7c | 2014-07-30 08:27:23 -0400 | [diff] [blame] | 6714 | atomic_inc(&clp->cl_refcount); |
Jeff Layton | 3fcbbd2 | 2015-08-24 12:41:48 -0400 | [diff] [blame] | 6715 | WARN_ON(!unhash_delegation_locked(dp)); |
Jeff Layton | 4269067 | 2014-07-25 07:34:20 -0400 | [diff] [blame] | 6716 | list_add(&dp->dl_recall_lru, victims); |
Jeff Layton | dff1399 | 2014-07-08 14:02:49 -0400 | [diff] [blame] | 6717 | } |
Jeff Layton | 98d5c7c | 2014-07-30 08:27:23 -0400 | [diff] [blame] | 6718 | ++count; |
| 6719 | /* |
| 6720 | * Despite the fact that these functions deal with |
| 6721 | * 64-bit integers for "count", we must ensure that |
| 6722 | * it doesn't blow up the clp->cl_refcount. Throw a |
| 6723 | * warning if we start to approach INT_MAX here. |
| 6724 | */ |
| 6725 | WARN_ON_ONCE(count == (INT_MAX / 2)); |
| 6726 | if (count == max) |
Bryan Schumaker | 269de30 | 2012-11-29 11:40:42 -0500 | [diff] [blame] | 6727 | break; |
| 6728 | } |
Jeff Layton | 98d5c7c | 2014-07-30 08:27:23 -0400 | [diff] [blame] | 6729 | spin_unlock(&state_lock); |
Bryan Schumaker | 269de30 | 2012-11-29 11:40:42 -0500 | [diff] [blame] | 6730 | return count; |
| 6731 | } |
| 6732 | |
Jeff Layton | 98d5c7c | 2014-07-30 08:27:23 -0400 | [diff] [blame] | 6733 | static u64 |
| 6734 | nfsd_print_client_delegations(struct nfs4_client *clp) |
Bryan Schumaker | 269de30 | 2012-11-29 11:40:42 -0500 | [diff] [blame] | 6735 | { |
Jeff Layton | 98d5c7c | 2014-07-30 08:27:23 -0400 | [diff] [blame] | 6736 | u64 count = nfsd_find_all_delegations(clp, 0, NULL); |
Bryan Schumaker | 184c184 | 2012-11-29 11:40:44 -0500 | [diff] [blame] | 6737 | |
| 6738 | nfsd_print_count(clp, count, "delegations"); |
| 6739 | return count; |
| 6740 | } |
| 6741 | |
Jeff Layton | 98d5c7c | 2014-07-30 08:27:23 -0400 | [diff] [blame] | 6742 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6743 | nfsd_inject_print_delegations(void) |
Jeff Layton | 98d5c7c | 2014-07-30 08:27:23 -0400 | [diff] [blame] | 6744 | { |
| 6745 | struct nfs4_client *clp; |
| 6746 | u64 count = 0; |
| 6747 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6748 | nfsd_net_id); |
| 6749 | |
| 6750 | if (!nfsd_netns_ready(nn)) |
| 6751 | return 0; |
| 6752 | |
| 6753 | spin_lock(&nn->client_lock); |
| 6754 | list_for_each_entry(clp, &nn->client_lru, cl_lru) |
| 6755 | count += nfsd_print_client_delegations(clp); |
| 6756 | spin_unlock(&nn->client_lock); |
| 6757 | |
| 6758 | return count; |
| 6759 | } |
| 6760 | |
| 6761 | static void |
| 6762 | nfsd_forget_delegations(struct list_head *reaplist) |
| 6763 | { |
| 6764 | struct nfs4_client *clp; |
| 6765 | struct nfs4_delegation *dp, *next; |
| 6766 | |
| 6767 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
| 6768 | list_del_init(&dp->dl_recall_lru); |
| 6769 | clp = dp->dl_stid.sc_client; |
| 6770 | revoke_delegation(dp); |
| 6771 | put_client(clp); |
| 6772 | } |
| 6773 | } |
| 6774 | |
| 6775 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6776 | nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, |
| 6777 | size_t addr_size) |
Jeff Layton | 98d5c7c | 2014-07-30 08:27:23 -0400 | [diff] [blame] | 6778 | { |
| 6779 | u64 count = 0; |
| 6780 | struct nfs4_client *clp; |
| 6781 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6782 | nfsd_net_id); |
| 6783 | LIST_HEAD(reaplist); |
| 6784 | |
| 6785 | if (!nfsd_netns_ready(nn)) |
| 6786 | return count; |
| 6787 | |
| 6788 | spin_lock(&nn->client_lock); |
| 6789 | clp = nfsd_find_client(addr, addr_size); |
| 6790 | if (clp) |
| 6791 | count = nfsd_find_all_delegations(clp, 0, &reaplist); |
| 6792 | spin_unlock(&nn->client_lock); |
| 6793 | |
| 6794 | nfsd_forget_delegations(&reaplist); |
| 6795 | return count; |
| 6796 | } |
| 6797 | |
| 6798 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6799 | nfsd_inject_forget_delegations(u64 max) |
Jeff Layton | 98d5c7c | 2014-07-30 08:27:23 -0400 | [diff] [blame] | 6800 | { |
| 6801 | u64 count = 0; |
| 6802 | struct nfs4_client *clp; |
| 6803 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6804 | nfsd_net_id); |
| 6805 | LIST_HEAD(reaplist); |
| 6806 | |
| 6807 | if (!nfsd_netns_ready(nn)) |
| 6808 | return count; |
| 6809 | |
| 6810 | spin_lock(&nn->client_lock); |
| 6811 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { |
| 6812 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); |
| 6813 | if (max != 0 && count >= max) |
| 6814 | break; |
| 6815 | } |
| 6816 | spin_unlock(&nn->client_lock); |
| 6817 | nfsd_forget_delegations(&reaplist); |
| 6818 | return count; |
| 6819 | } |
| 6820 | |
| 6821 | static void |
| 6822 | nfsd_recall_delegations(struct list_head *reaplist) |
| 6823 | { |
| 6824 | struct nfs4_client *clp; |
| 6825 | struct nfs4_delegation *dp, *next; |
| 6826 | |
| 6827 | list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { |
| 6828 | list_del_init(&dp->dl_recall_lru); |
| 6829 | clp = dp->dl_stid.sc_client; |
| 6830 | /* |
| 6831 | * We skipped all entries that had a zero dl_time before, |
| 6832 | * so we can now reset the dl_time back to 0. If a delegation |
| 6833 | * break comes in now, then it won't make any difference since |
| 6834 | * we're recalling it either way. |
| 6835 | */ |
| 6836 | spin_lock(&state_lock); |
| 6837 | dp->dl_time = 0; |
| 6838 | spin_unlock(&state_lock); |
| 6839 | nfsd_break_one_deleg(dp); |
| 6840 | put_client(clp); |
| 6841 | } |
| 6842 | } |
| 6843 | |
| 6844 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6845 | nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, |
Jeff Layton | 98d5c7c | 2014-07-30 08:27:23 -0400 | [diff] [blame] | 6846 | size_t addr_size) |
| 6847 | { |
| 6848 | u64 count = 0; |
| 6849 | struct nfs4_client *clp; |
| 6850 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6851 | nfsd_net_id); |
| 6852 | LIST_HEAD(reaplist); |
| 6853 | |
| 6854 | if (!nfsd_netns_ready(nn)) |
| 6855 | return count; |
| 6856 | |
| 6857 | spin_lock(&nn->client_lock); |
| 6858 | clp = nfsd_find_client(addr, addr_size); |
| 6859 | if (clp) |
| 6860 | count = nfsd_find_all_delegations(clp, 0, &reaplist); |
| 6861 | spin_unlock(&nn->client_lock); |
| 6862 | |
| 6863 | nfsd_recall_delegations(&reaplist); |
| 6864 | return count; |
| 6865 | } |
| 6866 | |
| 6867 | u64 |
Jeff Layton | 285abde | 2014-07-30 08:27:24 -0400 | [diff] [blame] | 6868 | nfsd_inject_recall_delegations(u64 max) |
Jeff Layton | 98d5c7c | 2014-07-30 08:27:23 -0400 | [diff] [blame] | 6869 | { |
| 6870 | u64 count = 0; |
| 6871 | struct nfs4_client *clp, *next; |
| 6872 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, |
| 6873 | nfsd_net_id); |
| 6874 | LIST_HEAD(reaplist); |
| 6875 | |
| 6876 | if (!nfsd_netns_ready(nn)) |
| 6877 | return count; |
| 6878 | |
| 6879 | spin_lock(&nn->client_lock); |
| 6880 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
| 6881 | count += nfsd_find_all_delegations(clp, max - count, &reaplist); |
| 6882 | if (max != 0 && ++count >= max) |
| 6883 | break; |
| 6884 | } |
| 6885 | spin_unlock(&nn->client_lock); |
| 6886 | nfsd_recall_delegations(&reaplist); |
| 6887 | return count; |
| 6888 | } |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 6889 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
| 6890 | |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 6891 | /* |
| 6892 | * Since the lifetime of a delegation isn't limited to that of an open, a |
| 6893 | * client may quite reasonably hang on to a delegation as long as it has |
| 6894 | * the inode cached. This becomes an obvious problem the first time a |
| 6895 | * client's inode cache approaches the size of the server's total memory. |
| 6896 | * |
| 6897 | * For now we avoid this problem by imposing a hard limit on the number |
| 6898 | * of delegations, which varies according to the server's memory size. |
| 6899 | */ |
| 6900 | static void |
| 6901 | set_max_delegations(void) |
| 6902 | { |
| 6903 | /* |
| 6904 | * Allow at most 4 delegations per megabyte of RAM. Quick |
| 6905 | * estimates suggest that in the worst case (where every delegation |
| 6906 | * is for a different inode), a delegation could take about 1.5K, |
| 6907 | * giving a worst case usage of about 6% of memory. |
| 6908 | */ |
| 6909 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); |
| 6910 | } |
| 6911 | |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 6912 | static int nfs4_state_create_net(struct net *net) |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 6913 | { |
| 6914 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
| 6915 | int i; |
| 6916 | |
| 6917 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
| 6918 | CLIENT_HASH_SIZE, GFP_KERNEL); |
| 6919 | if (!nn->conf_id_hashtbl) |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 6920 | goto err; |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 6921 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
| 6922 | CLIENT_HASH_SIZE, GFP_KERNEL); |
| 6923 | if (!nn->unconf_id_hashtbl) |
| 6924 | goto err_unconf_id; |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 6925 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
| 6926 | SESSION_HASH_SIZE, GFP_KERNEL); |
| 6927 | if (!nn->sessionid_hashtbl) |
| 6928 | goto err_sessionid; |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 6929 | |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 6930 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 6931 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 6932 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 6933 | } |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 6934 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
| 6935 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 6936 | nn->conf_name_tree = RB_ROOT; |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 6937 | nn->unconf_name_tree = RB_ROOT; |
Stanislav Kinsbursky | 5ed58bb | 2012-11-14 18:21:56 +0300 | [diff] [blame] | 6938 | INIT_LIST_HEAD(&nn->client_lru); |
Stanislav Kinsbursky | 73758fed | 2012-11-14 18:22:01 +0300 | [diff] [blame] | 6939 | INIT_LIST_HEAD(&nn->close_lru); |
J. Bruce Fields | e8c69d1 | 2013-03-21 15:19:33 -0400 | [diff] [blame] | 6940 | INIT_LIST_HEAD(&nn->del_recall_lru); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 6941 | spin_lock_init(&nn->client_lock); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 6942 | |
Jeff Layton | 0cc11a6 | 2016-10-20 09:34:31 -0400 | [diff] [blame] | 6943 | spin_lock_init(&nn->blocked_locks_lock); |
| 6944 | INIT_LIST_HEAD(&nn->blocked_locks_lru); |
| 6945 | |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 6946 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 6947 | get_net(net); |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 6948 | |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 6949 | return 0; |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 6950 | |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 6951 | err_sessionid: |
Stanislav Kinsbursky | 9b53113 | 2012-11-14 18:21:41 +0300 | [diff] [blame] | 6952 | kfree(nn->unconf_id_hashtbl); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 6953 | err_unconf_id: |
| 6954 | kfree(nn->conf_id_hashtbl); |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 6955 | err: |
| 6956 | return -ENOMEM; |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 6957 | } |
| 6958 | |
| 6959 | static void |
Stanislav Kinsbursky | 4dce0ac | 2012-11-26 15:22:08 +0300 | [diff] [blame] | 6960 | nfs4_state_destroy_net(struct net *net) |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 6961 | { |
| 6962 | int i; |
| 6963 | struct nfs4_client *clp = NULL; |
| 6964 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
| 6965 | |
| 6966 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 6967 | while (!list_empty(&nn->conf_id_hashtbl[i])) { |
| 6968 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); |
| 6969 | destroy_client(clp); |
| 6970 | } |
| 6971 | } |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 6972 | |
Kinglong Mee | 2b90563 | 2014-03-26 22:09:30 +0800 | [diff] [blame] | 6973 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 6974 | while (!list_empty(&nn->unconf_id_hashtbl[i])) { |
| 6975 | clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); |
| 6976 | destroy_client(clp); |
| 6977 | } |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 6978 | } |
| 6979 | |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 6980 | kfree(nn->sessionid_hashtbl); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 6981 | kfree(nn->unconf_id_hashtbl); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 6982 | kfree(nn->conf_id_hashtbl); |
Stanislav Kinsbursky | 4dce0ac | 2012-11-26 15:22:08 +0300 | [diff] [blame] | 6983 | put_net(net); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 6984 | } |
| 6985 | |
Stanislav Kinsbursky | f252bc6 | 2012-11-26 15:22:18 +0300 | [diff] [blame] | 6986 | int |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 6987 | nfs4_state_start_net(struct net *net) |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 6988 | { |
Stanislav Kinsbursky | 5e1533c | 2012-07-25 16:56:58 +0400 | [diff] [blame] | 6989 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 6990 | int ret; |
| 6991 | |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 6992 | ret = nfs4_state_create_net(net); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 6993 | if (ret) |
| 6994 | return ret; |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 6995 | nn->boot_time = get_seconds(); |
Stanislav Kinsbursky | a51c84e | 2012-07-25 16:57:37 +0400 | [diff] [blame] | 6996 | nn->grace_ended = false; |
J. Bruce Fields | c87fb4a | 2015-08-06 12:47:02 -0400 | [diff] [blame] | 6997 | nn->nfsd4_manager.block_opens = true; |
Jeff Layton | d4318ac | 2014-09-12 16:40:21 -0400 | [diff] [blame] | 6998 | locks_start_grace(net, &nn->nfsd4_manager); |
| 6999 | nfsd4_client_tracking_init(net); |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 7000 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
Stanislav Kinsbursky | 5284b44 | 2012-11-27 14:11:49 +0300 | [diff] [blame] | 7001 | nn->nfsd4_grace, net); |
| 7002 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 7003 | return 0; |
| 7004 | } |
| 7005 | |
| 7006 | /* initialization to perform when the nfsd service is started: */ |
| 7007 | |
| 7008 | int |
| 7009 | nfs4_state_start(void) |
| 7010 | { |
| 7011 | int ret; |
| 7012 | |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 7013 | ret = set_callback_cred(); |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 7014 | if (ret) |
Kinglong Mee | f7d1ddb | 2017-02-05 09:57:07 +0800 | [diff] [blame] | 7015 | return ret; |
| 7016 | |
Jeff Layton | 51a5456 | 2015-08-20 07:17:01 -0400 | [diff] [blame] | 7017 | laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); |
Jeff Layton | a6d6b78 | 2012-03-05 11:42:36 -0500 | [diff] [blame] | 7018 | if (laundry_wq == NULL) { |
| 7019 | ret = -ENOMEM; |
Kinglong Mee | f7d1ddb | 2017-02-05 09:57:07 +0800 | [diff] [blame] | 7020 | goto out_cleanup_cred; |
Jeff Layton | a6d6b78 | 2012-03-05 11:42:36 -0500 | [diff] [blame] | 7021 | } |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 7022 | ret = nfsd4_create_callback_queue(); |
| 7023 | if (ret) |
| 7024 | goto out_free_laundry; |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 7025 | |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 7026 | set_max_delegations(); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 7027 | return 0; |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 7028 | |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 7029 | out_free_laundry: |
| 7030 | destroy_workqueue(laundry_wq); |
Kinglong Mee | f7d1ddb | 2017-02-05 09:57:07 +0800 | [diff] [blame] | 7031 | out_cleanup_cred: |
| 7032 | cleanup_callback_cred(); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 7033 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7034 | } |
| 7035 | |
Stanislav Kinsbursky | f252bc6 | 2012-11-26 15:22:18 +0300 | [diff] [blame] | 7036 | void |
Stanislav Kinsbursky | 4dce0ac | 2012-11-26 15:22:08 +0300 | [diff] [blame] | 7037 | nfs4_state_shutdown_net(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7038 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7039 | struct nfs4_delegation *dp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7040 | struct list_head *pos, *next, reaplist; |
Stanislav Kinsbursky | 4dce0ac | 2012-11-26 15:22:08 +0300 | [diff] [blame] | 7041 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 7042 | struct nfsd4_blocked_lock *nbl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7043 | |
Stanislav Kinsbursky | 4dce0ac | 2012-11-26 15:22:08 +0300 | [diff] [blame] | 7044 | cancel_delayed_work_sync(&nn->laundromat_work); |
| 7045 | locks_end_grace(&nn->nfsd4_manager); |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 7046 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7047 | INIT_LIST_HEAD(&reaplist); |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 7048 | spin_lock(&state_lock); |
J. Bruce Fields | e8c69d1 | 2013-03-21 15:19:33 -0400 | [diff] [blame] | 7049 | list_for_each_safe(pos, next, &nn->del_recall_lru) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7050 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
Jeff Layton | 3fcbbd2 | 2015-08-24 12:41:48 -0400 | [diff] [blame] | 7051 | WARN_ON(!unhash_delegation_locked(dp)); |
Jeff Layton | 4269067 | 2014-07-25 07:34:20 -0400 | [diff] [blame] | 7052 | list_add(&dp->dl_recall_lru, &reaplist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7053 | } |
Benny Halevy | cdc9750 | 2014-05-30 09:09:30 -0400 | [diff] [blame] | 7054 | spin_unlock(&state_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7055 | list_for_each_safe(pos, next, &reaplist) { |
| 7056 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
Jeff Layton | 4269067 | 2014-07-25 07:34:20 -0400 | [diff] [blame] | 7057 | list_del_init(&dp->dl_recall_lru); |
Sachin Bhamare | 8287f00 | 2015-04-27 14:50:14 +0200 | [diff] [blame] | 7058 | put_clnt_odstate(dp->dl_clnt_odstate); |
Jeff Layton | afbda40 | 2014-08-09 10:22:41 -0400 | [diff] [blame] | 7059 | nfs4_put_deleg_lease(dp->dl_stid.sc_file); |
Trond Myklebust | 6011695 | 2014-07-29 21:34:06 -0400 | [diff] [blame] | 7060 | nfs4_put_stid(&dp->dl_stid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7061 | } |
| 7062 | |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 7063 | BUG_ON(!list_empty(&reaplist)); |
Jeff Layton | 0cc11a6 | 2016-10-20 09:34:31 -0400 | [diff] [blame] | 7064 | spin_lock(&nn->blocked_locks_lock); |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 7065 | while (!list_empty(&nn->blocked_locks_lru)) { |
| 7066 | nbl = list_first_entry(&nn->blocked_locks_lru, |
| 7067 | struct nfsd4_blocked_lock, nbl_lru); |
| 7068 | list_move(&nbl->nbl_lru, &reaplist); |
| 7069 | list_del_init(&nbl->nbl_list); |
| 7070 | } |
Jeff Layton | 0cc11a6 | 2016-10-20 09:34:31 -0400 | [diff] [blame] | 7071 | spin_unlock(&nn->blocked_locks_lock); |
Jeff Layton | 7919d0a | 2016-09-16 16:28:25 -0400 | [diff] [blame] | 7072 | |
| 7073 | while (!list_empty(&reaplist)) { |
| 7074 | nbl = list_first_entry(&nn->blocked_locks_lru, |
| 7075 | struct nfsd4_blocked_lock, nbl_lru); |
| 7076 | list_del_init(&nbl->nbl_lru); |
| 7077 | posix_unblock_lock(&nbl->nbl_lock); |
| 7078 | free_blocked_lock(nbl); |
| 7079 | } |
| 7080 | |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 7081 | nfsd4_client_tracking_exit(net); |
Stanislav Kinsbursky | 4dce0ac | 2012-11-26 15:22:08 +0300 | [diff] [blame] | 7082 | nfs4_state_destroy_net(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7083 | } |
| 7084 | |
| 7085 | void |
| 7086 | nfs4_state_shutdown(void) |
| 7087 | { |
NeilBrown | 5e8d5c2 | 2006-04-10 22:55:37 -0700 | [diff] [blame] | 7088 | destroy_workqueue(laundry_wq); |
J. Bruce Fields | c3935e3 | 2010-06-04 16:42:08 -0400 | [diff] [blame] | 7089 | nfsd4_destroy_callback_queue(); |
Kinglong Mee | f7d1ddb | 2017-02-05 09:57:07 +0800 | [diff] [blame] | 7090 | cleanup_callback_cred(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7091 | } |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 7092 | |
| 7093 | static void |
| 7094 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) |
| 7095 | { |
Tigran Mkrtchyan | 37c593c | 2012-02-13 22:55:32 +0100 | [diff] [blame] | 7096 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
| 7097 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 7098 | } |
| 7099 | |
| 7100 | static void |
| 7101 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) |
| 7102 | { |
Tigran Mkrtchyan | 37c593c | 2012-02-13 22:55:32 +0100 | [diff] [blame] | 7103 | if (cstate->minorversion) { |
| 7104 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); |
| 7105 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); |
| 7106 | } |
| 7107 | } |
| 7108 | |
| 7109 | void |
| 7110 | clear_current_stateid(struct nfsd4_compound_state *cstate) |
| 7111 | { |
| 7112 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 7113 | } |
| 7114 | |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 7115 | /* |
| 7116 | * functions to set current state id |
| 7117 | */ |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 7118 | void |
Tigran Mkrtchyan | 9428fe1 | 2012-02-13 22:55:31 +0100 | [diff] [blame] | 7119 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) |
| 7120 | { |
| 7121 | put_stateid(cstate, &odp->od_stateid); |
| 7122 | } |
| 7123 | |
| 7124 | void |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 7125 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) |
| 7126 | { |
| 7127 | put_stateid(cstate, &open->op_stateid); |
| 7128 | } |
| 7129 | |
| 7130 | void |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 7131 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) |
| 7132 | { |
| 7133 | put_stateid(cstate, &close->cl_stateid); |
| 7134 | } |
| 7135 | |
| 7136 | void |
| 7137 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) |
| 7138 | { |
| 7139 | put_stateid(cstate, &lock->lk_resp_stateid); |
| 7140 | } |
| 7141 | |
| 7142 | /* |
| 7143 | * functions to consume current state id |
| 7144 | */ |
Tigran Mkrtchyan | 1e97b51 | 2012-02-13 22:55:30 +0100 | [diff] [blame] | 7145 | |
| 7146 | void |
Tigran Mkrtchyan | 9428fe1 | 2012-02-13 22:55:31 +0100 | [diff] [blame] | 7147 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) |
| 7148 | { |
| 7149 | get_stateid(cstate, &odp->od_stateid); |
| 7150 | } |
| 7151 | |
| 7152 | void |
| 7153 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) |
| 7154 | { |
| 7155 | get_stateid(cstate, &drp->dr_stateid); |
| 7156 | } |
| 7157 | |
| 7158 | void |
Tigran Mkrtchyan | 1e97b51 | 2012-02-13 22:55:30 +0100 | [diff] [blame] | 7159 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) |
| 7160 | { |
| 7161 | get_stateid(cstate, &fsp->fr_stateid); |
| 7162 | } |
| 7163 | |
| 7164 | void |
| 7165 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) |
| 7166 | { |
| 7167 | get_stateid(cstate, &setattr->sa_stateid); |
| 7168 | } |
| 7169 | |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 7170 | void |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 7171 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) |
| 7172 | { |
| 7173 | get_stateid(cstate, &close->cl_stateid); |
| 7174 | } |
| 7175 | |
| 7176 | void |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 7177 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 7178 | { |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 7179 | get_stateid(cstate, &locku->lu_stateid); |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 7180 | } |
Tigran Mkrtchyan | 30813e2 | 2012-02-13 22:55:26 +0100 | [diff] [blame] | 7181 | |
| 7182 | void |
| 7183 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) |
| 7184 | { |
| 7185 | get_stateid(cstate, &read->rd_stateid); |
| 7186 | } |
| 7187 | |
| 7188 | void |
| 7189 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) |
| 7190 | { |
| 7191 | get_stateid(cstate, &write->wr_stateid); |
| 7192 | } |