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> |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 44 | #include "xdr4.h" |
J. Bruce Fields | 0a3adad | 2009-11-04 18:12:35 -0500 | [diff] [blame] | 45 | #include "vfs.h" |
J. Bruce Fields | bfa4b36 | 2012-04-25 16:49:18 -0400 | [diff] [blame] | 46 | #include "current_stateid.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Stanislav Kinsbursky | 5e1533c | 2012-07-25 16:56:58 +0400 | [diff] [blame] | 48 | #include "netns.h" |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
| 51 | |
J. Bruce Fields | f32f3c2 | 2011-12-12 15:00:35 -0500 | [diff] [blame] | 52 | #define all_ones {{~0,~0},~0} |
| 53 | static const stateid_t one_stateid = { |
| 54 | .si_generation = ~0, |
| 55 | .si_opaque = all_ones, |
| 56 | }; |
| 57 | static const stateid_t zero_stateid = { |
| 58 | /* all fields zero */ |
| 59 | }; |
Tigran Mkrtchyan | 19ff0f2 | 2012-02-13 22:55:23 +0100 | [diff] [blame] | 60 | static const stateid_t currentstateid = { |
| 61 | .si_generation = 1, |
| 62 | }; |
J. Bruce Fields | f32f3c2 | 2011-12-12 15:00:35 -0500 | [diff] [blame] | 63 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 64 | static u64 current_sessionid = 1; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 65 | |
J. Bruce Fields | f32f3c2 | 2011-12-12 15:00:35 -0500 | [diff] [blame] | 66 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
| 67 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) |
Tigran Mkrtchyan | 19ff0f2 | 2012-02-13 22:55:23 +0100 | [diff] [blame] | 68 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | /* forward declarations */ |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 71 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 73 | /* Locking: */ |
| 74 | |
| 75 | /* Currently used for almost all code touching nfsv4 state: */ |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 76 | static DEFINE_MUTEX(client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 78 | /* |
| 79 | * Currently used for the del_recall_lru and file hash table. In an |
| 80 | * effort to decrease the scope of the client_mutex, this spinlock may |
| 81 | * eventually cover more: |
| 82 | */ |
| 83 | static DEFINE_SPINLOCK(recall_lock); |
| 84 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 85 | static struct kmem_cache *openowner_slab = NULL; |
| 86 | static struct kmem_cache *lockowner_slab = NULL; |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 87 | static struct kmem_cache *file_slab = NULL; |
| 88 | static struct kmem_cache *stateid_slab = NULL; |
| 89 | static struct kmem_cache *deleg_slab = NULL; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | void |
| 92 | nfs4_lock_state(void) |
| 93 | { |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 94 | mutex_lock(&client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | } |
| 96 | |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 97 | static void free_session(struct kref *); |
| 98 | |
| 99 | /* Must be called under the client_lock */ |
| 100 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) |
| 101 | { |
| 102 | kref_put(&ses->se_ref, free_session); |
| 103 | } |
| 104 | |
| 105 | static void nfsd4_get_session(struct nfsd4_session *ses) |
| 106 | { |
| 107 | kref_get(&ses->se_ref); |
| 108 | } |
| 109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | void |
| 111 | nfs4_unlock_state(void) |
| 112 | { |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 113 | mutex_unlock(&client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | static inline u32 |
| 117 | opaque_hashval(const void *ptr, int nbytes) |
| 118 | { |
| 119 | unsigned char *cptr = (unsigned char *) ptr; |
| 120 | |
| 121 | u32 x = 0; |
| 122 | while (nbytes--) { |
| 123 | x *= 37; |
| 124 | x += *cptr++; |
| 125 | } |
| 126 | return x; |
| 127 | } |
| 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | static struct list_head del_recall_lru; |
| 130 | |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 131 | static void nfsd4_free_file(struct nfs4_file *f) |
| 132 | { |
| 133 | kmem_cache_free(file_slab, f); |
| 134 | } |
| 135 | |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 136 | static inline void |
| 137 | put_nfs4_file(struct nfs4_file *fi) |
| 138 | { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 139 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
| 140 | list_del(&fi->fi_hash); |
| 141 | spin_unlock(&recall_lock); |
| 142 | iput(fi->fi_inode); |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 143 | nfsd4_free_file(fi); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 144 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | static inline void |
| 148 | get_nfs4_file(struct nfs4_file *fi) |
| 149 | { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 150 | atomic_inc(&fi->fi_ref); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 151 | } |
| 152 | |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 153 | static int num_delegations; |
Zhang Yanfei | 697ce9b | 2013-02-22 16:35:47 -0800 | [diff] [blame] | 154 | unsigned long max_delegations; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 155 | |
| 156 | /* |
| 157 | * Open owner state (share locks) |
| 158 | */ |
| 159 | |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 160 | /* hash tables for lock and open owners */ |
| 161 | #define OWNER_HASH_BITS 8 |
| 162 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) |
| 163 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 164 | |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 165 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
J. Bruce Fields | ddc04c4 | 2011-07-30 23:46:29 -0400 | [diff] [blame] | 166 | { |
| 167 | unsigned int ret; |
| 168 | |
| 169 | ret = opaque_hashval(ownername->data, ownername->len); |
| 170 | ret += clientid; |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 171 | return ret & OWNER_HASH_MASK; |
J. Bruce Fields | ddc04c4 | 2011-07-30 23:46:29 -0400 | [diff] [blame] | 172 | } |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 173 | |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 174 | /* hash table for nfs4_file */ |
| 175 | #define FILE_HASH_BITS 8 |
| 176 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) |
Shan Wei | 3507958 | 2011-01-14 17:35:59 +0800 | [diff] [blame] | 177 | |
J. Bruce Fields | ddc04c4 | 2011-07-30 23:46:29 -0400 | [diff] [blame] | 178 | static unsigned int file_hashval(struct inode *ino) |
| 179 | { |
| 180 | /* XXX: why are we hashing on inode pointer, anyway? */ |
| 181 | return hash_ptr(ino, FILE_HASH_BITS); |
| 182 | } |
| 183 | |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 184 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 185 | |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 186 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 187 | { |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 188 | WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 189 | atomic_inc(&fp->fi_access[oflag]); |
| 190 | } |
| 191 | |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 192 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
| 193 | { |
| 194 | if (oflag == O_RDWR) { |
| 195 | __nfs4_file_get_access(fp, O_RDONLY); |
| 196 | __nfs4_file_get_access(fp, O_WRONLY); |
| 197 | } else |
| 198 | __nfs4_file_get_access(fp, oflag); |
| 199 | } |
| 200 | |
| 201 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 202 | { |
| 203 | if (fp->fi_fds[oflag]) { |
| 204 | fput(fp->fi_fds[oflag]); |
| 205 | fp->fi_fds[oflag] = NULL; |
| 206 | } |
| 207 | } |
| 208 | |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 209 | 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] | 210 | { |
| 211 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 212 | nfs4_file_put_fd(fp, oflag); |
J. Bruce Fields | 3d02fa2 | 2011-09-19 15:07:41 -0400 | [diff] [blame] | 213 | /* |
| 214 | * It's also safe to get rid of the RDWR open *if* |
| 215 | * we no longer have need of the other kind of access |
| 216 | * or if we already have the other kind of open: |
| 217 | */ |
| 218 | if (fp->fi_fds[1-oflag] |
| 219 | || atomic_read(&fp->fi_access[1 - oflag]) == 0) |
| 220 | nfs4_file_put_fd(fp, O_RDWR); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 221 | } |
| 222 | } |
| 223 | |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 224 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
| 225 | { |
| 226 | if (oflag == O_RDWR) { |
| 227 | __nfs4_file_put_access(fp, O_RDONLY); |
| 228 | __nfs4_file_put_access(fp, O_WRONLY); |
| 229 | } else |
| 230 | __nfs4_file_put_access(fp, oflag); |
| 231 | } |
| 232 | |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 233 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct |
| 234 | kmem_cache *slab) |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 235 | { |
| 236 | struct idr *stateids = &cl->cl_stateids; |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 237 | static int min_stateid = 0; |
| 238 | struct nfs4_stid *stid; |
| 239 | int new_id; |
| 240 | |
| 241 | stid = kmem_cache_alloc(slab, GFP_KERNEL); |
| 242 | if (!stid) |
| 243 | return NULL; |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 244 | |
Tejun Heo | ebd6c70 | 2013-03-13 14:59:37 -0700 | [diff] [blame] | 245 | new_id = idr_alloc(stateids, stid, min_stateid, 0, GFP_KERNEL); |
| 246 | if (new_id < 0) |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 247 | goto out_free; |
| 248 | stid->sc_client = cl; |
| 249 | stid->sc_type = 0; |
| 250 | stid->sc_stateid.si_opaque.so_id = new_id; |
| 251 | stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; |
| 252 | /* Will be incremented before return to client: */ |
| 253 | stid->sc_stateid.si_generation = 0; |
| 254 | |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 255 | /* |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 256 | * It shouldn't be a problem to reuse an opaque stateid value. |
| 257 | * I don't think it is for 4.1. But with 4.0 I worry that, for |
| 258 | * example, a stray write retransmission could be accepted by |
| 259 | * the server when it should have been rejected. Therefore, |
| 260 | * adopt a trick from the sctp code to attempt to maximize the |
| 261 | * amount of time until an id is reused, by ensuring they always |
| 262 | * "increase" (mod INT_MAX): |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 263 | */ |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 264 | |
| 265 | min_stateid = new_id+1; |
| 266 | if (min_stateid == INT_MAX) |
| 267 | min_stateid = 0; |
| 268 | return stid; |
| 269 | out_free: |
| 270 | kfree(stid); |
| 271 | return NULL; |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 272 | } |
| 273 | |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 274 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
| 275 | { |
| 276 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); |
| 277 | } |
| 278 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | static struct nfs4_delegation * |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 280 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | { |
| 282 | struct nfs4_delegation *dp; |
| 283 | struct nfs4_file *fp = stp->st_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
| 285 | dprintk("NFSD alloc_init_deleg\n"); |
J. Bruce Fields | c3e4808 | 2010-07-28 10:08:57 -0400 | [diff] [blame] | 286 | /* |
| 287 | * Major work on the lease subsystem (for example, to support |
| 288 | * calbacks on stat) will be required before we can support |
| 289 | * write delegations properly. |
| 290 | */ |
| 291 | if (type != NFS4_OPEN_DELEGATE_READ) |
| 292 | return NULL; |
Meelap Shah | 47f9940 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 293 | if (fp->fi_had_conflict) |
| 294 | return NULL; |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 295 | if (num_delegations > max_delegations) |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 296 | return NULL; |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 297 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 298 | if (dp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | return dp; |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 300 | dp->dl_stid.sc_type = NFS4_DELEG_STID; |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 301 | /* |
| 302 | * delegation seqid's are never incremented. The 4.1 special |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 303 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
| 304 | * 0 anyway just for consistency and use 1: |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 305 | */ |
| 306 | dp->dl_stid.sc_stateid.si_generation = 1; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 307 | num_delegations++; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 308 | INIT_LIST_HEAD(&dp->dl_perfile); |
| 309 | INIT_LIST_HEAD(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 311 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | dp->dl_file = fp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | dp->dl_type = type; |
J. Bruce Fields | 6c02eaa | 2009-02-02 17:30:51 -0500 | [diff] [blame] | 314 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | dp->dl_time = 0; |
| 316 | atomic_set(&dp->dl_count, 1); |
J. Bruce Fields | 5772515 | 2012-11-05 15:10:26 -0500 | [diff] [blame] | 317 | nfsd4_init_callback(&dp->dl_recall); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | return dp; |
| 319 | } |
| 320 | |
Fengguang Wu | e56a316 | 2013-02-11 16:21:42 -0500 | [diff] [blame] | 321 | static void free_stid(struct nfs4_stid *s, struct kmem_cache *slab) |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 322 | { |
| 323 | struct idr *stateids = &s->sc_client->cl_stateids; |
| 324 | |
| 325 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); |
| 326 | kmem_cache_free(slab, s); |
| 327 | } |
| 328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | void |
| 330 | nfs4_put_delegation(struct nfs4_delegation *dp) |
| 331 | { |
| 332 | if (atomic_dec_and_test(&dp->dl_count)) { |
| 333 | dprintk("NFSD: freeing dp %p\n",dp); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 334 | put_nfs4_file(dp->dl_file); |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 335 | free_stid(&dp->dl_stid, deleg_slab); |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 336 | num_delegations--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | } |
| 338 | } |
| 339 | |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 340 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | { |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 342 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
| 343 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); |
| 344 | fp->fi_lease = NULL; |
J. Bruce Fields | 4ee6362 | 2011-04-15 18:08:26 -0400 | [diff] [blame] | 345 | fput(fp->fi_deleg_file); |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 346 | fp->fi_deleg_file = NULL; |
| 347 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | } |
| 349 | |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 350 | static void unhash_stid(struct nfs4_stid *s) |
| 351 | { |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 352 | s->sc_type = 0; |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 353 | } |
| 354 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | /* Called under the state lock. */ |
| 356 | static void |
| 357 | unhash_delegation(struct nfs4_delegation *dp) |
| 358 | { |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 359 | unhash_stid(&dp->dl_stid); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 360 | list_del_init(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | spin_lock(&recall_lock); |
J. Bruce Fields | 5d926e8 | 2011-02-07 16:53:46 -0500 | [diff] [blame] | 362 | list_del_init(&dp->dl_perfile); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | list_del_init(&dp->dl_recall_lru); |
| 364 | spin_unlock(&recall_lock); |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 365 | nfs4_put_deleg_lease(dp->dl_file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | nfs4_put_delegation(dp); |
| 367 | } |
| 368 | |
| 369 | /* |
| 370 | * SETCLIENTID state |
| 371 | */ |
| 372 | |
J. Bruce Fields | ddc04c4 | 2011-07-30 23:46:29 -0400 | [diff] [blame] | 373 | static unsigned int clientid_hashval(u32 id) |
| 374 | { |
| 375 | return id & CLIENT_HASH_MASK; |
| 376 | } |
| 377 | |
| 378 | static unsigned int clientstr_hashval(const char *name) |
| 379 | { |
| 380 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; |
| 381 | } |
| 382 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | /* |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 384 | * We store the NONE, READ, WRITE, and BOTH bits separately in the |
| 385 | * st_{access,deny}_bmap field of the stateid, in order to track not |
| 386 | * only what share bits are currently in force, but also what |
| 387 | * combinations of share bits previous opens have used. This allows us |
| 388 | * to enforce the recommendation of rfc 3530 14.2.19 that the server |
| 389 | * return an error if the client attempt to downgrade to a combination |
| 390 | * of share bits not explicable by closing some of its previous opens. |
| 391 | * |
| 392 | * XXX: This enforcement is actually incomplete, since we don't keep |
| 393 | * track of access/deny bit combinations; so, e.g., we allow: |
| 394 | * |
| 395 | * OPEN allow read, deny write |
| 396 | * OPEN allow both, deny none |
| 397 | * DOWNGRADE allow read, deny none |
| 398 | * |
| 399 | * which we should reject. |
| 400 | */ |
Jeff Layton | 5ae037e | 2012-05-11 09:45:11 -0400 | [diff] [blame] | 401 | static unsigned int |
| 402 | bmap_to_share_mode(unsigned long bmap) { |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 403 | int i; |
Jeff Layton | 5ae037e | 2012-05-11 09:45:11 -0400 | [diff] [blame] | 404 | unsigned int access = 0; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 405 | |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 406 | for (i = 1; i < 4; i++) { |
| 407 | if (test_bit(i, &bmap)) |
Jeff Layton | 5ae037e | 2012-05-11 09:45:11 -0400 | [diff] [blame] | 408 | access |= i; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 409 | } |
Jeff Layton | 5ae037e | 2012-05-11 09:45:11 -0400 | [diff] [blame] | 410 | return access; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 411 | } |
| 412 | |
Jeff Layton | 3a32861 | 2012-05-11 09:45:12 -0400 | [diff] [blame] | 413 | static bool |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 414 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 415 | unsigned int access, deny; |
| 416 | |
Jeff Layton | 5ae037e | 2012-05-11 09:45:11 -0400 | [diff] [blame] | 417 | access = bmap_to_share_mode(stp->st_access_bmap); |
| 418 | deny = bmap_to_share_mode(stp->st_deny_bmap); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 419 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
Jeff Layton | 3a32861 | 2012-05-11 09:45:12 -0400 | [diff] [blame] | 420 | return false; |
| 421 | return true; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 422 | } |
| 423 | |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 424 | /* set share access for a given stateid */ |
| 425 | static inline void |
| 426 | set_access(u32 access, struct nfs4_ol_stateid *stp) |
| 427 | { |
| 428 | __set_bit(access, &stp->st_access_bmap); |
| 429 | } |
| 430 | |
| 431 | /* clear share access for a given stateid */ |
| 432 | static inline void |
| 433 | clear_access(u32 access, struct nfs4_ol_stateid *stp) |
| 434 | { |
| 435 | __clear_bit(access, &stp->st_access_bmap); |
| 436 | } |
| 437 | |
| 438 | /* test whether a given stateid has access */ |
| 439 | static inline bool |
| 440 | test_access(u32 access, struct nfs4_ol_stateid *stp) |
| 441 | { |
| 442 | return test_bit(access, &stp->st_access_bmap); |
| 443 | } |
| 444 | |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 445 | /* set share deny for a given stateid */ |
| 446 | static inline void |
| 447 | set_deny(u32 access, struct nfs4_ol_stateid *stp) |
| 448 | { |
| 449 | __set_bit(access, &stp->st_deny_bmap); |
| 450 | } |
| 451 | |
| 452 | /* clear share deny for a given stateid */ |
| 453 | static inline void |
| 454 | clear_deny(u32 access, struct nfs4_ol_stateid *stp) |
| 455 | { |
| 456 | __clear_bit(access, &stp->st_deny_bmap); |
| 457 | } |
| 458 | |
| 459 | /* test whether a given stateid is denying specific access */ |
| 460 | static inline bool |
| 461 | test_deny(u32 access, struct nfs4_ol_stateid *stp) |
| 462 | { |
| 463 | return test_bit(access, &stp->st_deny_bmap); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | static int nfs4_access_to_omode(u32 access) |
| 467 | { |
J. Bruce Fields | 8f34a43 | 2010-09-02 15:23:16 -0400 | [diff] [blame] | 468 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 469 | case NFS4_SHARE_ACCESS_READ: |
| 470 | return O_RDONLY; |
| 471 | case NFS4_SHARE_ACCESS_WRITE: |
| 472 | return O_WRONLY; |
| 473 | case NFS4_SHARE_ACCESS_BOTH: |
| 474 | return O_RDWR; |
| 475 | } |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 476 | WARN_ON_ONCE(1); |
| 477 | return O_RDONLY; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 478 | } |
| 479 | |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 480 | /* release all access and file references for a given stateid */ |
| 481 | static void |
| 482 | release_all_access(struct nfs4_ol_stateid *stp) |
| 483 | { |
| 484 | int i; |
| 485 | |
| 486 | for (i = 1; i < 4; i++) { |
| 487 | if (test_access(i, stp)) |
| 488 | nfs4_file_put_access(stp->st_file, |
| 489 | nfs4_access_to_omode(i)); |
| 490 | clear_access(i, stp); |
| 491 | } |
| 492 | } |
| 493 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 494 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 495 | { |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 496 | list_del(&stp->st_perfile); |
| 497 | list_del(&stp->st_perstateowner); |
| 498 | } |
| 499 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 500 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 501 | { |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 502 | release_all_access(stp); |
OGAWA Hirofumi | a96e5b9 | 2011-04-18 11:48:55 -0400 | [diff] [blame] | 503 | put_nfs4_file(stp->st_file); |
J. Bruce Fields | 4665e2b | 2011-09-06 14:50:49 -0400 | [diff] [blame] | 504 | stp->st_file = NULL; |
| 505 | } |
| 506 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 507 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
J. Bruce Fields | 4665e2b | 2011-09-06 14:50:49 -0400 | [diff] [blame] | 508 | { |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 509 | free_stid(&stp->st_stid, stateid_slab); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 510 | } |
| 511 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 512 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 513 | { |
| 514 | struct file *file; |
| 515 | |
| 516 | unhash_generic_stateid(stp); |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 517 | unhash_stid(&stp->st_stid); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 518 | file = find_any_file(stp->st_file); |
| 519 | if (file) |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 520 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 521 | close_generic_stateid(stp); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 522 | free_generic_stateid(stp); |
| 523 | } |
| 524 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 525 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 526 | { |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 527 | struct nfs4_ol_stateid *stp; |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 528 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 529 | list_del(&lo->lo_owner.so_strhash); |
| 530 | list_del(&lo->lo_perstateid); |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 531 | list_del(&lo->lo_owner_ino_hash); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 532 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
| 533 | stp = list_first_entry(&lo->lo_owner.so_stateids, |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 534 | struct nfs4_ol_stateid, st_perstateowner); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 535 | release_lock_stateid(stp); |
| 536 | } |
| 537 | } |
| 538 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 539 | static void release_lockowner(struct nfs4_lockowner *lo) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 540 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 541 | unhash_lockowner(lo); |
| 542 | nfs4_free_lockowner(lo); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | static void |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 546 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 547 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 548 | struct nfs4_lockowner *lo; |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 549 | |
| 550 | while (!list_empty(&open_stp->st_lockowners)) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 551 | lo = list_entry(open_stp->st_lockowners.next, |
| 552 | struct nfs4_lockowner, lo_perstateid); |
| 553 | release_lockowner(lo); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 554 | } |
| 555 | } |
| 556 | |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 557 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 558 | { |
| 559 | unhash_generic_stateid(stp); |
| 560 | release_stateid_lockowners(stp); |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 561 | close_generic_stateid(stp); |
| 562 | } |
| 563 | |
| 564 | static void release_open_stateid(struct nfs4_ol_stateid *stp) |
| 565 | { |
| 566 | unhash_open_stateid(stp); |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 567 | unhash_stid(&stp->st_stid); |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 568 | free_generic_stateid(stp); |
| 569 | } |
| 570 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 571 | static void unhash_openowner(struct nfs4_openowner *oo) |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 572 | { |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 573 | struct nfs4_ol_stateid *stp; |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 574 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 575 | list_del(&oo->oo_owner.so_strhash); |
| 576 | list_del(&oo->oo_perclient); |
| 577 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
| 578 | stp = list_first_entry(&oo->oo_owner.so_stateids, |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 579 | struct nfs4_ol_stateid, st_perstateowner); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 580 | release_open_stateid(stp); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 581 | } |
| 582 | } |
| 583 | |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 584 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
| 585 | { |
| 586 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; |
| 587 | |
| 588 | if (s) { |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 589 | unhash_stid(&s->st_stid); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 590 | free_generic_stateid(s); |
| 591 | oo->oo_last_closed_stid = NULL; |
| 592 | } |
| 593 | } |
| 594 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 595 | static void release_openowner(struct nfs4_openowner *oo) |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 596 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 597 | unhash_openowner(oo); |
| 598 | list_del(&oo->oo_close_lru); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 599 | release_last_closed_stateid(oo); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 600 | nfs4_free_openowner(oo); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 601 | } |
| 602 | |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 603 | static inline int |
| 604 | hash_sessionid(struct nfs4_sessionid *sessionid) |
| 605 | { |
| 606 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; |
| 607 | |
| 608 | return sid->sequence % SESSION_HASH_SIZE; |
| 609 | } |
| 610 | |
Trond Myklebust | 8f199b8 | 2012-03-20 15:11:17 -0400 | [diff] [blame] | 611 | #ifdef NFSD_DEBUG |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 612 | static inline void |
| 613 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) |
| 614 | { |
| 615 | u32 *ptr = (u32 *)(&sessionid->data[0]); |
| 616 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); |
| 617 | } |
Trond Myklebust | 8f199b8 | 2012-03-20 15:11:17 -0400 | [diff] [blame] | 618 | #else |
| 619 | static inline void |
| 620 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) |
| 621 | { |
| 622 | } |
| 623 | #endif |
| 624 | |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 625 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 626 | static void |
| 627 | gen_sessionid(struct nfsd4_session *ses) |
| 628 | { |
| 629 | struct nfs4_client *clp = ses->se_client; |
| 630 | struct nfsd4_sessionid *sid; |
| 631 | |
| 632 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; |
| 633 | sid->clientid = clp->cl_clientid; |
| 634 | sid->sequence = current_sessionid++; |
| 635 | sid->reserved = 0; |
| 636 | } |
| 637 | |
| 638 | /* |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 639 | * The protocol defines ca_maxresponssize_cached to include the size of |
| 640 | * the rpc header, but all we need to cache is the data starting after |
| 641 | * the end of the initial SEQUENCE operation--the rest we regenerate |
| 642 | * each time. Therefore we can advertise a ca_maxresponssize_cached |
| 643 | * value that is the number of bytes in our cache plus a few additional |
| 644 | * bytes. In order to stay on the safe side, and not promise more than |
| 645 | * we can cache, those additional bytes must be the minimum possible: 24 |
| 646 | * bytes of rpc header (xid through accept state, with AUTH_NULL |
| 647 | * verifier), 12 for the compound header (with zero-length tag), and 44 |
| 648 | * for the SEQUENCE op response: |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 649 | */ |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 650 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) |
| 651 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 652 | static void |
| 653 | free_session_slots(struct nfsd4_session *ses) |
| 654 | { |
| 655 | int i; |
| 656 | |
| 657 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) |
| 658 | kfree(ses->se_slots[i]); |
| 659 | } |
| 660 | |
J. Bruce Fields | efe0cb6 | 2009-10-24 20:52:16 -0400 | [diff] [blame] | 661 | /* |
| 662 | * We don't actually need to cache the rpc and session headers, so we |
| 663 | * can allocate a little less for each slot: |
| 664 | */ |
| 665 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) |
| 666 | { |
| 667 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; |
| 668 | } |
| 669 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 670 | static int nfsd4_sanitize_slot_size(u32 size) |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 671 | { |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 672 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
| 673 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 674 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 675 | return size; |
| 676 | } |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 677 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 678 | /* |
| 679 | * XXX: If we run out of reserved DRC memory we could (up to a point) |
| 680 | * re-negotiate active sessions and reduce their slot usage to make |
Justin P. Mattock | 42b2aa8 | 2011-11-28 20:31:00 -0800 | [diff] [blame] | 681 | * 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] | 682 | */ |
| 683 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
| 684 | { |
| 685 | int avail; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 686 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 687 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 688 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 689 | spin_lock(&nfsd_drc_lock); |
Zhang Yanfei | 697ce9b | 2013-02-22 16:35:47 -0800 | [diff] [blame] | 690 | avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, |
| 691 | nfsd_drc_max_mem - nfsd_drc_mem_used); |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 692 | num = min_t(int, num, avail / slotsize); |
| 693 | nfsd_drc_mem_used += num * slotsize; |
| 694 | spin_unlock(&nfsd_drc_lock); |
| 695 | |
| 696 | return num; |
| 697 | } |
| 698 | |
| 699 | static void nfsd4_put_drc_mem(int slotsize, int num) |
| 700 | { |
| 701 | spin_lock(&nfsd_drc_lock); |
| 702 | nfsd_drc_mem_used -= slotsize * num; |
| 703 | spin_unlock(&nfsd_drc_lock); |
| 704 | } |
| 705 | |
J. Bruce Fields | a827bcb | 2012-09-12 09:51:34 -0400 | [diff] [blame] | 706 | static struct nfsd4_session *__alloc_session(int slotsize, int numslots) |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 707 | { |
| 708 | struct nfsd4_session *new; |
| 709 | int mem, i; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 710 | |
J. Bruce Fields | c23753d | 2010-09-27 16:22:30 -0400 | [diff] [blame] | 711 | 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] | 712 | + sizeof(struct nfsd4_session) > PAGE_SIZE); |
| 713 | mem = numslots * sizeof(struct nfsd4_slot *); |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 714 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 715 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 716 | if (!new) |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 717 | return NULL; |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 718 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 719 | for (i = 0; i < numslots; i++) { |
| 720 | mem = sizeof(struct nfsd4_slot) + slotsize; |
| 721 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); |
| 722 | if (!new->se_slots[i]) |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 723 | goto out_free; |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 724 | } |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 725 | return new; |
| 726 | out_free: |
| 727 | while (i--) |
| 728 | kfree(new->se_slots[i]); |
| 729 | kfree(new); |
| 730 | return NULL; |
| 731 | } |
| 732 | |
Stanislav Kinsbursky | 9dd9845 | 2012-12-06 14:23:24 +0300 | [diff] [blame] | 733 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, |
| 734 | struct nfsd4_channel_attrs *req, |
| 735 | int numslots, int slotsize, |
| 736 | struct nfsd_net *nn) |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 737 | { |
Stanislav Kinsbursky | 9dd9845 | 2012-12-06 14:23:24 +0300 | [diff] [blame] | 738 | u32 maxrpc = nn->nfsd_serv->sv_max_mesg; |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 739 | |
| 740 | new->maxreqs = numslots; |
Mi Jinlong | d2b2174 | 2011-03-10 17:43:37 +0800 | [diff] [blame] | 741 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
| 742 | slotsize + NFSD_MIN_HDR_SEQ_SZ); |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 743 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
| 744 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); |
| 745 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); |
| 746 | } |
| 747 | |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 748 | static void free_conn(struct nfsd4_conn *c) |
| 749 | { |
| 750 | svc_xprt_put(c->cn_xprt); |
| 751 | kfree(c); |
| 752 | } |
| 753 | |
| 754 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
| 755 | { |
| 756 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); |
| 757 | struct nfs4_client *clp = c->cn_session->se_client; |
| 758 | |
| 759 | spin_lock(&clp->cl_lock); |
| 760 | if (!list_empty(&c->cn_persession)) { |
| 761 | list_del(&c->cn_persession); |
| 762 | free_conn(c); |
| 763 | } |
| 764 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | eea4980 | 2010-11-18 08:34:12 -0500 | [diff] [blame] | 765 | nfsd4_probe_callback(clp); |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 766 | } |
| 767 | |
J. Bruce Fields | d29c374 | 2010-06-15 17:34:11 -0400 | [diff] [blame] | 768 | 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] | 769 | { |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 770 | struct nfsd4_conn *conn; |
| 771 | |
| 772 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
| 773 | if (!conn) |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 774 | return NULL; |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 775 | svc_xprt_get(rqstp->rq_xprt); |
| 776 | conn->cn_xprt = rqstp->rq_xprt; |
J. Bruce Fields | d29c374 | 2010-06-15 17:34:11 -0400 | [diff] [blame] | 777 | conn->cn_flags = flags; |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 778 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
| 779 | return conn; |
| 780 | } |
| 781 | |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 782 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
| 783 | { |
| 784 | conn->cn_session = ses; |
| 785 | list_add(&conn->cn_persession, &ses->se_conns); |
| 786 | } |
| 787 | |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 788 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
| 789 | { |
| 790 | struct nfs4_client *clp = ses->se_client; |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 791 | |
| 792 | spin_lock(&clp->cl_lock); |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 793 | __nfsd4_hash_conn(conn, ses); |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 794 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 795 | } |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 796 | |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 797 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 798 | { |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 799 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 800 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 801 | } |
| 802 | |
J. Bruce Fields | e1ff371 | 2012-09-11 17:10:25 -0400 | [diff] [blame] | 803 | 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] | 804 | { |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 805 | int ret; |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 806 | |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 807 | nfsd4_hash_conn(conn, ses); |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 808 | ret = nfsd4_register_conn(conn); |
| 809 | if (ret) |
| 810 | /* oops; xprt is already down: */ |
| 811 | nfsd4_conn_lost(&conn->cn_xpt_user); |
J. Bruce Fields | 6a3b156 | 2012-09-12 09:59:17 -0400 | [diff] [blame] | 812 | if (conn->cn_flags & NFS4_CDFC4_BACK) { |
Weston Andros Adamson | 2411967 | 2012-05-24 15:42:17 -0400 | [diff] [blame] | 813 | /* callback channel may be back up */ |
| 814 | nfsd4_probe_callback(ses->se_client); |
| 815 | } |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 816 | } |
| 817 | |
J. Bruce Fields | e1ff371 | 2012-09-11 17:10:25 -0400 | [diff] [blame] | 818 | 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] | 819 | { |
| 820 | u32 dir = NFS4_CDFC4_FORE; |
| 821 | |
J. Bruce Fields | e1ff371 | 2012-09-11 17:10:25 -0400 | [diff] [blame] | 822 | if (cses->flags & SESSION4_BACK_CHAN) |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 823 | dir |= NFS4_CDFC4_BACK; |
J. Bruce Fields | e1ff371 | 2012-09-11 17:10:25 -0400 | [diff] [blame] | 824 | return alloc_conn(rqstp, dir); |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 825 | } |
| 826 | |
| 827 | /* must be called under client_lock */ |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 828 | static void nfsd4_del_conns(struct nfsd4_session *s) |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 829 | { |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 830 | struct nfs4_client *clp = s->se_client; |
| 831 | struct nfsd4_conn *c; |
| 832 | |
| 833 | spin_lock(&clp->cl_lock); |
| 834 | while (!list_empty(&s->se_conns)) { |
| 835 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); |
| 836 | list_del_init(&c->cn_persession); |
| 837 | spin_unlock(&clp->cl_lock); |
| 838 | |
| 839 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
| 840 | free_conn(c); |
| 841 | |
| 842 | spin_lock(&clp->cl_lock); |
| 843 | } |
| 844 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 845 | } |
| 846 | |
J. Bruce Fields | 1377b69 | 2012-09-11 21:42:40 -0400 | [diff] [blame] | 847 | static void __free_session(struct nfsd4_session *ses) |
| 848 | { |
| 849 | nfsd4_put_drc_mem(slot_bytes(&ses->se_fchannel), ses->se_fchannel.maxreqs); |
| 850 | free_session_slots(ses); |
| 851 | kfree(ses); |
| 852 | } |
| 853 | |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 854 | static void free_session(struct kref *kref) |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 855 | { |
| 856 | struct nfsd4_session *ses; |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 857 | struct nfsd_net *nn; |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 858 | |
| 859 | ses = container_of(kref, struct nfsd4_session, se_ref); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 860 | nn = net_generic(ses->se_client->net, nfsd_net_id); |
| 861 | |
| 862 | lockdep_assert_held(&nn->client_lock); |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 863 | nfsd4_del_conns(ses); |
J. Bruce Fields | 1377b69 | 2012-09-11 21:42:40 -0400 | [diff] [blame] | 864 | __free_session(ses); |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 865 | } |
| 866 | |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 867 | void nfsd4_put_session(struct nfsd4_session *ses) |
| 868 | { |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 869 | struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); |
| 870 | |
| 871 | spin_lock(&nn->client_lock); |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 872 | nfsd4_put_session_locked(ses); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 873 | spin_unlock(&nn->client_lock); |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 874 | } |
| 875 | |
Stanislav Kinsbursky | 9dd9845 | 2012-12-06 14:23:24 +0300 | [diff] [blame] | 876 | static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan, |
| 877 | struct nfsd_net *nn) |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 878 | { |
| 879 | struct nfsd4_session *new; |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 880 | int numslots, slotsize; |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 881 | /* |
| 882 | * Note decreasing slot size below client's request may |
| 883 | * make it difficult for client to function correctly, whereas |
| 884 | * decreasing the number of slots will (just?) affect |
| 885 | * performance. When short on memory we therefore prefer to |
| 886 | * decrease number of slots instead of their size. |
| 887 | */ |
| 888 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); |
| 889 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); |
Mi Jinlong | ced6dfe | 2010-11-11 18:03:50 +0800 | [diff] [blame] | 890 | if (numslots < 1) |
| 891 | return NULL; |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 892 | |
J. Bruce Fields | a827bcb | 2012-09-12 09:51:34 -0400 | [diff] [blame] | 893 | new = __alloc_session(slotsize, numslots); |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 894 | if (!new) { |
Yanchuan Nian | 74b70dd | 2012-12-24 18:11:27 +0800 | [diff] [blame] | 895 | nfsd4_put_drc_mem(slotsize, numslots); |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 896 | return NULL; |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 897 | } |
Stanislav Kinsbursky | 9dd9845 | 2012-12-06 14:23:24 +0300 | [diff] [blame] | 898 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize, nn); |
J. Bruce Fields | a827bcb | 2012-09-12 09:51:34 -0400 | [diff] [blame] | 899 | return new; |
| 900 | } |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 901 | |
Fengguang Wu | 135ae82 | 2012-11-10 07:20:25 -0500 | [diff] [blame] | 902 | 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] | 903 | { |
J. Bruce Fields | a827bcb | 2012-09-12 09:51:34 -0400 | [diff] [blame] | 904 | int idx; |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 905 | 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] | 906 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 907 | new->se_client = clp; |
| 908 | gen_sessionid(new); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 909 | |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 910 | INIT_LIST_HEAD(&new->se_conns); |
| 911 | |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 912 | new->se_cb_seq_nr = 1; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 913 | new->se_flags = cses->flags; |
J. Bruce Fields | 8b5ce5c | 2010-10-19 17:31:50 -0400 | [diff] [blame] | 914 | new->se_cb_prog = cses->callback_prog; |
J. Bruce Fields | c6bb3ca | 2012-11-01 16:31:02 -0400 | [diff] [blame] | 915 | new->se_cb_sec = cses->cb_sec; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 916 | kref_init(&new->se_ref); |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 917 | idx = hash_sessionid(&new->se_sessionid); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 918 | spin_lock(&nn->client_lock); |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 919 | list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 920 | spin_lock(&clp->cl_lock); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 921 | list_add(&new->se_perclnt, &clp->cl_sessions); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 922 | spin_unlock(&clp->cl_lock); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 923 | spin_unlock(&nn->client_lock); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 924 | |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 925 | if (cses->flags & SESSION4_BACK_CHAN) { |
J. Bruce Fields | edd7678 | 2010-06-14 22:26:31 -0400 | [diff] [blame] | 926 | struct sockaddr *sa = svc_addr(rqstp); |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 927 | /* |
| 928 | * This is a little silly; with sessions there's no real |
| 929 | * use for the callback address. Use the peer address |
| 930 | * as a reasonable default for now, but consider fixing |
| 931 | * the rpc client not to require an address in the |
| 932 | * future: |
| 933 | */ |
J. Bruce Fields | edd7678 | 2010-06-14 22:26:31 -0400 | [diff] [blame] | 934 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
| 935 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); |
J. Bruce Fields | edd7678 | 2010-06-14 22:26:31 -0400 | [diff] [blame] | 936 | } |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 937 | } |
| 938 | |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 939 | /* caller must hold client_lock */ |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 940 | static struct nfsd4_session * |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 941 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 942 | { |
| 943 | struct nfsd4_session *elem; |
| 944 | int idx; |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 945 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 946 | |
| 947 | dump_sessionid(__func__, sessionid); |
| 948 | idx = hash_sessionid(sessionid); |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 949 | /* Search in the appropriate list */ |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 950 | list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 951 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
| 952 | NFS4_MAX_SESSIONID_LEN)) { |
| 953 | return elem; |
| 954 | } |
| 955 | } |
| 956 | |
| 957 | dprintk("%s: session not found\n", __func__); |
| 958 | return NULL; |
| 959 | } |
| 960 | |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 961 | /* caller must hold client_lock */ |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 962 | static void |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 963 | unhash_session(struct nfsd4_session *ses) |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 964 | { |
| 965 | list_del(&ses->se_hash); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 966 | spin_lock(&ses->se_client->cl_lock); |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 967 | list_del(&ses->se_perclnt); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 968 | spin_unlock(&ses->se_client->cl_lock); |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 969 | } |
| 970 | |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 971 | /* must be called under the client_lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | static inline void |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 973 | renew_client_locked(struct nfs4_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | { |
Stanislav Kinsbursky | 5ed58bb | 2012-11-14 18:21:56 +0300 | [diff] [blame] | 975 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
| 976 | |
Benny Halevy | 07cd490 | 2010-05-12 00:13:41 +0300 | [diff] [blame] | 977 | if (is_client_expired(clp)) { |
J. Bruce Fields | 7447758 | 2012-05-04 14:57:52 -0400 | [diff] [blame] | 978 | WARN_ON(1); |
| 979 | printk("%s: client (clientid %08x/%08x) already expired\n", |
Benny Halevy | 07cd490 | 2010-05-12 00:13:41 +0300 | [diff] [blame] | 980 | __func__, |
| 981 | clp->cl_clientid.cl_boot, |
| 982 | clp->cl_clientid.cl_id); |
| 983 | return; |
| 984 | } |
| 985 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | dprintk("renewing client (clientid %08x/%08x)\n", |
| 987 | clp->cl_clientid.cl_boot, |
| 988 | clp->cl_clientid.cl_id); |
Stanislav Kinsbursky | 5ed58bb | 2012-11-14 18:21:56 +0300 | [diff] [blame] | 989 | list_move_tail(&clp->cl_lru, &nn->client_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | clp->cl_time = get_seconds(); |
| 991 | } |
| 992 | |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 993 | static inline void |
| 994 | renew_client(struct nfs4_client *clp) |
| 995 | { |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 996 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
| 997 | |
| 998 | spin_lock(&nn->client_lock); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 999 | renew_client_locked(clp); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1000 | spin_unlock(&nn->client_lock); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 1001 | } |
| 1002 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
| 1004 | static int |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 1005 | STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | { |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 1007 | if (clid->cl_boot == nn->boot_time) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | return 0; |
Andy Adamson | 60adfc5 | 2009-04-03 08:28:50 +0300 | [diff] [blame] | 1009 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 1010 | clid->cl_boot, clid->cl_id, nn->boot_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | return 1; |
| 1012 | } |
| 1013 | |
| 1014 | /* |
| 1015 | * XXX Should we use a slab cache ? |
| 1016 | * This type of memory management is somewhat inefficient, but we use it |
| 1017 | * anyway since SETCLIENTID is not a common operation. |
| 1018 | */ |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1019 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | { |
| 1021 | struct nfs4_client *clp; |
| 1022 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1023 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
| 1024 | if (clp == NULL) |
| 1025 | return NULL; |
Thomas Meyer | 67114fe | 2011-11-17 23:43:40 +0100 | [diff] [blame] | 1026 | clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1027 | if (clp->cl_name.data == NULL) { |
| 1028 | kfree(clp); |
| 1029 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | } |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1031 | clp->cl_name.len = name.len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | return clp; |
| 1033 | } |
| 1034 | |
| 1035 | static inline void |
| 1036 | free_client(struct nfs4_client *clp) |
| 1037 | { |
Stanislav Kinsbursky | bca0ec6 | 2013-01-09 12:38:34 +0300 | [diff] [blame] | 1038 | struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1039 | |
| 1040 | lockdep_assert_held(&nn->client_lock); |
J. Bruce Fields | 792c95d | 2010-10-12 19:55:25 -0400 | [diff] [blame] | 1041 | while (!list_empty(&clp->cl_sessions)) { |
| 1042 | struct nfsd4_session *ses; |
| 1043 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, |
| 1044 | se_perclnt); |
| 1045 | list_del(&ses->se_perclnt); |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 1046 | nfsd4_put_session_locked(ses); |
J. Bruce Fields | 792c95d | 2010-10-12 19:55:25 -0400 | [diff] [blame] | 1047 | } |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 1048 | free_svc_cred(&clp->cl_cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | kfree(clp->cl_name.data); |
majianpeng | 2d32b29 | 2013-01-29 13:16:06 +0800 | [diff] [blame] | 1050 | idr_destroy(&clp->cl_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | kfree(clp); |
| 1052 | } |
| 1053 | |
Benny Halevy | d768298 | 2010-05-12 00:13:54 +0300 | [diff] [blame] | 1054 | void |
| 1055 | release_session_client(struct nfsd4_session *session) |
| 1056 | { |
| 1057 | struct nfs4_client *clp = session->se_client; |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1058 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
Benny Halevy | d768298 | 2010-05-12 00:13:54 +0300 | [diff] [blame] | 1059 | |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1060 | if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) |
Benny Halevy | d768298 | 2010-05-12 00:13:54 +0300 | [diff] [blame] | 1061 | return; |
| 1062 | if (is_client_expired(clp)) { |
| 1063 | free_client(clp); |
| 1064 | session->se_client = NULL; |
| 1065 | } else |
| 1066 | renew_client_locked(clp); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1067 | spin_unlock(&nn->client_lock); |
Benny Halevy | d768298 | 2010-05-12 00:13:54 +0300 | [diff] [blame] | 1068 | } |
| 1069 | |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 1070 | /* must be called under the client_lock */ |
| 1071 | static inline void |
| 1072 | unhash_client_locked(struct nfs4_client *clp) |
| 1073 | { |
J. Bruce Fields | 792c95d | 2010-10-12 19:55:25 -0400 | [diff] [blame] | 1074 | struct nfsd4_session *ses; |
| 1075 | |
Benny Halevy | 07cd490 | 2010-05-12 00:13:41 +0300 | [diff] [blame] | 1076 | mark_client_expired(clp); |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 1077 | list_del(&clp->cl_lru); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 1078 | spin_lock(&clp->cl_lock); |
J. Bruce Fields | 792c95d | 2010-10-12 19:55:25 -0400 | [diff] [blame] | 1079 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
| 1080 | list_del_init(&ses->se_hash); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 1081 | spin_unlock(&clp->cl_lock); |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 1082 | } |
| 1083 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | static void |
J. Bruce Fields | 0d22f68 | 2012-09-26 11:36:16 -0400 | [diff] [blame] | 1085 | destroy_client(struct nfs4_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 1087 | struct nfs4_openowner *oo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | struct nfs4_delegation *dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | struct list_head reaplist; |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 1090 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | INIT_LIST_HEAD(&reaplist); |
| 1093 | spin_lock(&recall_lock); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1094 | while (!list_empty(&clp->cl_delegations)) { |
| 1095 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1096 | list_del_init(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | list_move(&dp->dl_recall_lru, &reaplist); |
| 1098 | } |
| 1099 | spin_unlock(&recall_lock); |
| 1100 | while (!list_empty(&reaplist)) { |
| 1101 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | unhash_delegation(dp); |
| 1103 | } |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1104 | while (!list_empty(&clp->cl_openowners)) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 1105 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
| 1106 | release_openowner(oo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | } |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1108 | nfsd4_shutdown_callback(clp); |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 1109 | if (clp->cl_cb_conn.cb_xprt) |
| 1110 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 1111 | list_del(&clp->cl_idhash); |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 1112 | if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 1113 | rb_erase(&clp->cl_namenode, &nn->conf_name_tree); |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 1114 | else |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 1115 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1116 | spin_lock(&nn->client_lock); |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 1117 | unhash_client_locked(clp); |
Benny Halevy | 46583e2 | 2010-05-12 00:13:29 +0300 | [diff] [blame] | 1118 | if (atomic_read(&clp->cl_refcount) == 0) |
| 1119 | free_client(clp); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1120 | spin_unlock(&nn->client_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | } |
| 1122 | |
J. Bruce Fields | 0d22f68 | 2012-09-26 11:36:16 -0400 | [diff] [blame] | 1123 | static void expire_client(struct nfs4_client *clp) |
| 1124 | { |
| 1125 | nfsd4_client_record_remove(clp); |
| 1126 | destroy_client(clp); |
| 1127 | } |
| 1128 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1129 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
| 1130 | { |
| 1131 | memcpy(target->cl_verifier.data, source->data, |
| 1132 | sizeof(target->cl_verifier.data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | } |
| 1134 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1135 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
| 1136 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
| 1138 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; |
| 1139 | } |
| 1140 | |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 1141 | static int copy_cred(struct svc_cred *target, struct svc_cred *source) |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1142 | { |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 1143 | if (source->cr_principal) { |
| 1144 | target->cr_principal = |
| 1145 | kstrdup(source->cr_principal, GFP_KERNEL); |
| 1146 | if (target->cr_principal == NULL) |
| 1147 | return -ENOMEM; |
| 1148 | } else |
| 1149 | target->cr_principal = NULL; |
J. Bruce Fields | d5497fc | 2012-05-14 22:06:49 -0400 | [diff] [blame] | 1150 | target->cr_flavor = source->cr_flavor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | target->cr_uid = source->cr_uid; |
| 1152 | target->cr_gid = source->cr_gid; |
| 1153 | target->cr_group_info = source->cr_group_info; |
| 1154 | get_group_info(target->cr_group_info); |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 1155 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | } |
| 1157 | |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 1158 | static long long |
| 1159 | compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) |
| 1160 | { |
| 1161 | long long res; |
| 1162 | |
| 1163 | res = o1->len - o2->len; |
| 1164 | if (res) |
| 1165 | return res; |
| 1166 | return (long long)memcmp(o1->data, o2->data, o1->len); |
| 1167 | } |
| 1168 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1169 | static int same_name(const char *n1, const char *n2) |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1170 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1171 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | } |
| 1173 | |
| 1174 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1175 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
| 1176 | { |
| 1177 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | } |
| 1179 | |
| 1180 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1181 | same_clid(clientid_t *cl1, clientid_t *cl2) |
| 1182 | { |
| 1183 | 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] | 1184 | } |
| 1185 | |
J. Bruce Fields | 8fbba96 | 2012-05-14 21:20:54 -0400 | [diff] [blame] | 1186 | static bool groups_equal(struct group_info *g1, struct group_info *g2) |
| 1187 | { |
| 1188 | int i; |
| 1189 | |
| 1190 | if (g1->ngroups != g2->ngroups) |
| 1191 | return false; |
| 1192 | for (i=0; i<g1->ngroups; i++) |
Eric W. Biederman | 6fab877 | 2013-02-02 06:53:11 -0800 | [diff] [blame] | 1193 | if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) |
J. Bruce Fields | 8fbba96 | 2012-05-14 21:20:54 -0400 | [diff] [blame] | 1194 | return false; |
| 1195 | return true; |
| 1196 | } |
| 1197 | |
J. Bruce Fields | 68eb350 | 2012-08-21 12:48:30 -0400 | [diff] [blame] | 1198 | /* |
| 1199 | * RFC 3530 language requires clid_inuse be returned when the |
| 1200 | * "principal" associated with a requests differs from that previously |
| 1201 | * used. We use uid, gid's, and gss principal string as our best |
| 1202 | * approximation. We also don't want to allow non-gss use of a client |
| 1203 | * established using gss: in theory cr_principal should catch that |
| 1204 | * change, but in practice cr_principal can be null even in the gss case |
| 1205 | * since gssd doesn't always pass down a principal string. |
| 1206 | */ |
| 1207 | static bool is_gss_cred(struct svc_cred *cr) |
| 1208 | { |
| 1209 | /* Is cr_flavor one of the gss "pseudoflavors"?: */ |
| 1210 | return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); |
| 1211 | } |
| 1212 | |
| 1213 | |
Vivek Trivedi | 5559b50 | 2012-07-24 21:18:20 +0530 | [diff] [blame] | 1214 | static bool |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1215 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
| 1216 | { |
J. Bruce Fields | 68eb350 | 2012-08-21 12:48:30 -0400 | [diff] [blame] | 1217 | if ((is_gss_cred(cr1) != is_gss_cred(cr2)) |
Eric W. Biederman | 6fab877 | 2013-02-02 06:53:11 -0800 | [diff] [blame] | 1218 | || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) |
| 1219 | || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) |
J. Bruce Fields | 8fbba96 | 2012-05-14 21:20:54 -0400 | [diff] [blame] | 1220 | || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) |
| 1221 | return false; |
| 1222 | if (cr1->cr_principal == cr2->cr_principal) |
| 1223 | return true; |
| 1224 | if (!cr1->cr_principal || !cr2->cr_principal) |
| 1225 | return false; |
Vivek Trivedi | 5559b50 | 2012-07-24 21:18:20 +0530 | [diff] [blame] | 1226 | return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | } |
| 1228 | |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 1229 | static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) |
J. Bruce Fields | 5ec7b46 | 2007-11-21 21:58:56 -0500 | [diff] [blame] | 1230 | { |
| 1231 | static u32 current_clientid = 1; |
| 1232 | |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 1233 | clp->cl_clientid.cl_boot = nn->boot_time; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | clp->cl_clientid.cl_id = current_clientid++; |
| 1235 | } |
| 1236 | |
J. Bruce Fields | deda2fa | 2007-11-19 20:31:04 -0500 | [diff] [blame] | 1237 | static void gen_confirm(struct nfs4_client *clp) |
| 1238 | { |
Chuck Lever | ab4684d | 2012-03-02 17:13:50 -0500 | [diff] [blame] | 1239 | __be32 verf[2]; |
J. Bruce Fields | deda2fa | 2007-11-19 20:31:04 -0500 | [diff] [blame] | 1240 | static u32 i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | |
Chuck Lever | ab4684d | 2012-03-02 17:13:50 -0500 | [diff] [blame] | 1242 | verf[0] = (__be32)get_seconds(); |
| 1243 | verf[1] = (__be32)i++; |
| 1244 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | } |
| 1246 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 1247 | static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) |
J. Bruce Fields | 4581d14 | 2011-09-06 14:56:09 -0400 | [diff] [blame] | 1248 | { |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 1249 | struct nfs4_stid *ret; |
| 1250 | |
| 1251 | ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
| 1252 | if (!ret || !ret->sc_type) |
| 1253 | return NULL; |
| 1254 | return ret; |
J. Bruce Fields | 4d71ab8 | 2011-09-06 16:48:57 -0400 | [diff] [blame] | 1255 | } |
| 1256 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 1257 | static struct nfs4_stid *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] | 1258 | { |
| 1259 | struct nfs4_stid *s; |
| 1260 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 1261 | s = find_stateid(cl, t); |
J. Bruce Fields | f459e45 | 2011-09-09 09:06:12 -0400 | [diff] [blame] | 1262 | if (!s) |
| 1263 | return NULL; |
| 1264 | if (typemask & s->sc_type) |
J. Bruce Fields | 4d71ab8 | 2011-09-06 16:48:57 -0400 | [diff] [blame] | 1265 | return s; |
J. Bruce Fields | 4581d14 | 2011-09-06 14:56:09 -0400 | [diff] [blame] | 1266 | return NULL; |
| 1267 | } |
| 1268 | |
Jeff Layton | 2216d44 | 2012-11-12 15:00:57 -0500 | [diff] [blame] | 1269 | static struct nfs4_client *create_client(struct xdr_netobj name, |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1270 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
| 1271 | { |
| 1272 | struct nfs4_client *clp; |
| 1273 | struct sockaddr *sa = svc_addr(rqstp); |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 1274 | int ret; |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 1275 | struct net *net = SVC_NET(rqstp); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1276 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1277 | |
| 1278 | clp = alloc_client(name); |
| 1279 | if (clp == NULL) |
| 1280 | return NULL; |
| 1281 | |
J. Bruce Fields | 792c95d | 2010-10-12 19:55:25 -0400 | [diff] [blame] | 1282 | INIT_LIST_HEAD(&clp->cl_sessions); |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 1283 | ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
| 1284 | if (ret) { |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1285 | spin_lock(&nn->client_lock); |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 1286 | free_client(clp); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1287 | spin_unlock(&nn->client_lock); |
J. Bruce Fields | 03a4e1f | 2012-05-14 19:55:22 -0400 | [diff] [blame] | 1288 | return NULL; |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1289 | } |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 1290 | idr_init(&clp->cl_stateids); |
Benny Halevy | 46583e2 | 2010-05-12 00:13:29 +0300 | [diff] [blame] | 1291 | atomic_set(&clp->cl_refcount, 0); |
J. Bruce Fields | 77a3569 | 2010-04-30 18:51:44 -0400 | [diff] [blame] | 1292 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1293 | INIT_LIST_HEAD(&clp->cl_idhash); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1294 | INIT_LIST_HEAD(&clp->cl_openowners); |
| 1295 | INIT_LIST_HEAD(&clp->cl_delegations); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1296 | INIT_LIST_HEAD(&clp->cl_lru); |
J. Bruce Fields | 5ce8ba2 | 2011-01-10 16:44:41 -0500 | [diff] [blame] | 1297 | INIT_LIST_HEAD(&clp->cl_callbacks); |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1298 | spin_lock_init(&clp->cl_lock); |
J. Bruce Fields | 5772515 | 2012-11-05 15:10:26 -0500 | [diff] [blame] | 1299 | nfsd4_init_callback(&clp->cl_cb_null); |
Benny Halevy | 07cd490 | 2010-05-12 00:13:41 +0300 | [diff] [blame] | 1300 | clp->cl_time = get_seconds(); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1301 | clear_bit(0, &clp->cl_cb_slot_busy); |
| 1302 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); |
| 1303 | copy_verf(clp, verf); |
| 1304 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1305 | gen_confirm(clp); |
J. Bruce Fields | edd7678 | 2010-06-14 22:26:31 -0400 | [diff] [blame] | 1306 | clp->cl_cb_session = NULL; |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 1307 | clp->net = net; |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1308 | return clp; |
| 1309 | } |
| 1310 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1311 | static void |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 1312 | add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) |
| 1313 | { |
| 1314 | struct rb_node **new = &(root->rb_node), *parent = NULL; |
| 1315 | struct nfs4_client *clp; |
| 1316 | |
| 1317 | while (*new) { |
| 1318 | clp = rb_entry(*new, struct nfs4_client, cl_namenode); |
| 1319 | parent = *new; |
| 1320 | |
| 1321 | if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) |
| 1322 | new = &((*new)->rb_left); |
| 1323 | else |
| 1324 | new = &((*new)->rb_right); |
| 1325 | } |
| 1326 | |
| 1327 | rb_link_node(&new_clp->cl_namenode, parent, new); |
| 1328 | rb_insert_color(&new_clp->cl_namenode, root); |
| 1329 | } |
| 1330 | |
| 1331 | static struct nfs4_client * |
| 1332 | find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) |
| 1333 | { |
| 1334 | long long cmp; |
| 1335 | struct rb_node *node = root->rb_node; |
| 1336 | struct nfs4_client *clp; |
| 1337 | |
| 1338 | while (node) { |
| 1339 | clp = rb_entry(node, struct nfs4_client, cl_namenode); |
| 1340 | cmp = compare_blob(&clp->cl_name, name); |
| 1341 | if (cmp > 0) |
| 1342 | node = node->rb_left; |
| 1343 | else if (cmp < 0) |
| 1344 | node = node->rb_right; |
| 1345 | else |
| 1346 | return clp; |
| 1347 | } |
| 1348 | return NULL; |
| 1349 | } |
| 1350 | |
| 1351 | static void |
| 1352 | add_to_unconfirmed(struct nfs4_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | { |
| 1354 | unsigned int idhashval; |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 1355 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 1357 | clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 1358 | add_clp_to_name_tree(clp, &nn->unconf_name_tree); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 1360 | list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 1361 | renew_client(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | } |
| 1363 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1364 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | move_to_confirmed(struct nfs4_client *clp) |
| 1366 | { |
| 1367 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 1368 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | |
| 1370 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 1371 | list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 1372 | rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 1373 | add_clp_to_name_tree(clp, &nn->conf_name_tree); |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 1374 | set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | renew_client(clp); |
| 1376 | } |
| 1377 | |
| 1378 | static struct nfs4_client * |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 1379 | find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | { |
| 1381 | struct nfs4_client *clp; |
| 1382 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 1383 | |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 1384 | list_for_each_entry(clp, &nn->conf_id_hashtbl[idhashval], cl_idhash) { |
J. Bruce Fields | a50d2ad | 2011-10-12 16:24:27 -0400 | [diff] [blame] | 1385 | if (same_clid(&clp->cl_clientid, clid)) { |
J. Bruce Fields | d15c077 | 2012-09-13 16:19:31 -0400 | [diff] [blame] | 1386 | if ((bool)clp->cl_minorversion != sessions) |
| 1387 | return NULL; |
J. Bruce Fields | a50d2ad | 2011-10-12 16:24:27 -0400 | [diff] [blame] | 1388 | renew_client(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | return clp; |
J. Bruce Fields | a50d2ad | 2011-10-12 16:24:27 -0400 | [diff] [blame] | 1390 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | } |
| 1392 | return NULL; |
| 1393 | } |
| 1394 | |
| 1395 | static struct nfs4_client * |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 1396 | find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | { |
| 1398 | struct nfs4_client *clp; |
| 1399 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 1400 | |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 1401 | list_for_each_entry(clp, &nn->unconf_id_hashtbl[idhashval], cl_idhash) { |
J. Bruce Fields | d15c077 | 2012-09-13 16:19:31 -0400 | [diff] [blame] | 1402 | if (same_clid(&clp->cl_clientid, clid)) { |
| 1403 | if ((bool)clp->cl_minorversion != sessions) |
| 1404 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | return clp; |
J. Bruce Fields | d15c077 | 2012-09-13 16:19:31 -0400 | [diff] [blame] | 1406 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | } |
| 1408 | return NULL; |
| 1409 | } |
| 1410 | |
J. Bruce Fields | 6e5f15c | 2010-11-24 17:17:34 -0500 | [diff] [blame] | 1411 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1412 | { |
J. Bruce Fields | 6e5f15c | 2010-11-24 17:17:34 -0500 | [diff] [blame] | 1413 | return clp->cl_exchange_flags != 0; |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 1414 | } |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1415 | |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1416 | static struct nfs4_client * |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 1417 | find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1418 | { |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 1419 | return find_clp_in_name_tree(name, &nn->conf_name_tree); |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1420 | } |
| 1421 | |
| 1422 | static struct nfs4_client * |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 1423 | find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1424 | { |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 1425 | return find_clp_in_name_tree(name, &nn->unconf_name_tree); |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1426 | } |
| 1427 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1428 | static void |
Takuma Umeya | 6f3d772 | 2010-12-15 14:09:01 +0900 | [diff] [blame] | 1429 | 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] | 1430 | { |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1431 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
Takuma Umeya | 6f3d772 | 2010-12-15 14:09:01 +0900 | [diff] [blame] | 1432 | struct sockaddr *sa = svc_addr(rqstp); |
| 1433 | u32 scopeid = rpc_get_scope_id(sa); |
Jeff Layton | 7077ecb | 2009-08-14 12:57:58 -0400 | [diff] [blame] | 1434 | unsigned short expected_family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | |
Jeff Layton | 7077ecb | 2009-08-14 12:57:58 -0400 | [diff] [blame] | 1436 | /* Currently, we only support tcp and tcp6 for the callback channel */ |
| 1437 | if (se->se_callback_netid_len == 3 && |
| 1438 | !memcmp(se->se_callback_netid_val, "tcp", 3)) |
| 1439 | expected_family = AF_INET; |
| 1440 | else if (se->se_callback_netid_len == 4 && |
| 1441 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) |
| 1442 | expected_family = AF_INET6; |
| 1443 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | goto out_err; |
| 1445 | |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 1446 | conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 1447 | se->se_callback_addr_len, |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1448 | (struct sockaddr *)&conn->cb_addr, |
| 1449 | sizeof(conn->cb_addr)); |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 1450 | |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1451 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | goto out_err; |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 1453 | |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1454 | if (conn->cb_addr.ss_family == AF_INET6) |
| 1455 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; |
Jeff Layton | fbf4665 | 2009-08-14 12:57:59 -0400 | [diff] [blame] | 1456 | |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1457 | conn->cb_prog = se->se_callback_prog; |
| 1458 | conn->cb_ident = se->se_callback_ident; |
Mi Jinlong | 849a1cf | 2011-08-30 17:18:41 +0800 | [diff] [blame] | 1459 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | return; |
| 1461 | out_err: |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1462 | conn->cb_addr.ss_family = AF_UNSPEC; |
| 1463 | conn->cb_addrlen = 0; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 1464 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | "will not receive delegations\n", |
| 1466 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 1467 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | return; |
| 1469 | } |
| 1470 | |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1471 | /* |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1472 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1473 | */ |
| 1474 | void |
| 1475 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
| 1476 | { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1477 | struct nfsd4_slot *slot = resp->cstate.slot; |
| 1478 | unsigned int base; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1479 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1480 | dprintk("--> %s slot %p\n", __func__, slot); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1481 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1482 | slot->sl_opcnt = resp->opcnt; |
| 1483 | slot->sl_status = resp->cstate.status; |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1484 | |
J. Bruce Fields | bf5c43c | 2012-02-13 16:56:19 -0500 | [diff] [blame] | 1485 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1486 | if (nfsd4_not_cached(resp)) { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1487 | slot->sl_datalen = 0; |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1488 | return; |
| 1489 | } |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1490 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
| 1491 | base = (char *)resp->cstate.datap - |
| 1492 | (char *)resp->xbuf->head[0].iov_base; |
| 1493 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, |
| 1494 | slot->sl_datalen)) |
| 1495 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
| 1496 | return; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1497 | } |
| 1498 | |
| 1499 | /* |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1500 | * Encode the replay sequence operation from the slot values. |
| 1501 | * If cachethis is FALSE encode the uncached rep error on the next |
| 1502 | * operation which sets resp->p and increments resp->opcnt for |
| 1503 | * nfs4svc_encode_compoundres. |
| 1504 | * |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1505 | */ |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1506 | static __be32 |
| 1507 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, |
| 1508 | struct nfsd4_compoundres *resp) |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1509 | { |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1510 | struct nfsd4_op *op; |
| 1511 | struct nfsd4_slot *slot = resp->cstate.slot; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1512 | |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1513 | /* Encode the replayed sequence operation */ |
| 1514 | op = &args->ops[resp->opcnt - 1]; |
| 1515 | nfsd4_encode_operation(resp, op); |
| 1516 | |
| 1517 | /* Return nfserr_retry_uncached_rep in next operation. */ |
J. Bruce Fields | 73e7948 | 2012-02-13 16:39:00 -0500 | [diff] [blame] | 1518 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1519 | op = &args->ops[resp->opcnt++]; |
| 1520 | op->status = nfserr_retry_uncached_rep; |
| 1521 | nfsd4_encode_operation(resp, op); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1522 | } |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1523 | return op->status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1524 | } |
| 1525 | |
| 1526 | /* |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1527 | * The sequence operation is not cached because we can use the slot and |
| 1528 | * session values. |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1529 | */ |
| 1530 | __be32 |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1531 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
| 1532 | struct nfsd4_sequence *seq) |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1533 | { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1534 | struct nfsd4_slot *slot = resp->cstate.slot; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1535 | __be32 status; |
| 1536 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1537 | dprintk("--> %s slot %p\n", __func__, slot); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1538 | |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1539 | /* Either returns 0 or nfserr_retry_uncached */ |
| 1540 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
| 1541 | if (status == nfserr_retry_uncached_rep) |
| 1542 | return status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1543 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1544 | /* The sequence operation has been encoded, cstate->datap set. */ |
| 1545 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1546 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1547 | resp->opcnt = slot->sl_opcnt; |
| 1548 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); |
| 1549 | status = slot->sl_status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1550 | |
| 1551 | return status; |
| 1552 | } |
| 1553 | |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1554 | /* |
| 1555 | * Set the exchange_id flags returned by the server. |
| 1556 | */ |
| 1557 | static void |
| 1558 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) |
| 1559 | { |
| 1560 | /* pNFS is not supported */ |
| 1561 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
| 1562 | |
| 1563 | /* Referrals are supported, Migration is not. */ |
| 1564 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; |
| 1565 | |
| 1566 | /* set the wire flags to return to client. */ |
| 1567 | clid->flags = new->cl_exchange_flags; |
| 1568 | } |
| 1569 | |
J. Bruce Fields | 631fc9e | 2012-05-14 15:57:23 -0400 | [diff] [blame] | 1570 | static bool client_has_state(struct nfs4_client *clp) |
| 1571 | { |
| 1572 | /* |
| 1573 | * Note clp->cl_openowners check isn't quite right: there's no |
| 1574 | * need to count owners without stateid's. |
| 1575 | * |
| 1576 | * Also note we should probably be using this in 4.0 case too. |
| 1577 | */ |
J. Bruce Fields | 6eccece | 2012-05-29 16:37:44 -0400 | [diff] [blame] | 1578 | return !list_empty(&clp->cl_openowners) |
| 1579 | || !list_empty(&clp->cl_delegations) |
| 1580 | || !list_empty(&clp->cl_sessions); |
J. Bruce Fields | 631fc9e | 2012-05-14 15:57:23 -0400 | [diff] [blame] | 1581 | } |
| 1582 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1583 | __be32 |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1584 | nfsd4_exchange_id(struct svc_rqst *rqstp, |
| 1585 | struct nfsd4_compound_state *cstate, |
| 1586 | struct nfsd4_exchange_id *exid) |
| 1587 | { |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1588 | struct nfs4_client *unconf, *conf, *new; |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 1589 | __be32 status; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1590 | char addr_str[INET6_ADDRSTRLEN]; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1591 | nfs4_verifier verf = exid->verifier; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1592 | struct sockaddr *sa = svc_addr(rqstp); |
J. Bruce Fields | 83e08fd | 2012-05-14 09:08:10 -0400 | [diff] [blame] | 1593 | bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 1594 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1595 | |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1596 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1597 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1598 | "ip_addr=%s flags %x, spa_how %d\n", |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1599 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1600 | addr_str, exid->flags, exid->spa_how); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1601 | |
J. Bruce Fields | a084daf | 2011-10-10 15:07:40 -0400 | [diff] [blame] | 1602 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1603 | return nfserr_inval; |
| 1604 | |
| 1605 | /* Currently only support SP4_NONE */ |
| 1606 | switch (exid->spa_how) { |
| 1607 | case SP4_NONE: |
| 1608 | break; |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 1609 | default: /* checked by xdr code */ |
| 1610 | WARN_ON_ONCE(1); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1611 | case SP4_SSV: |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1612 | case SP4_MACH_CRED: |
| 1613 | return nfserr_serverfault; /* no excuse :-/ */ |
| 1614 | } |
| 1615 | |
J. Bruce Fields | 2dbb269 | 2012-05-14 09:47:11 -0400 | [diff] [blame] | 1616 | /* Cases below refer to rfc 5661 section 18.35.4: */ |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1617 | nfs4_lock_state(); |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 1618 | conf = find_confirmed_client_by_name(&exid->clname, nn); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1619 | if (conf) { |
J. Bruce Fields | 83e08fd | 2012-05-14 09:08:10 -0400 | [diff] [blame] | 1620 | bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); |
| 1621 | bool verfs_match = same_verf(&verf, &conf->cl_verifier); |
| 1622 | |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 1623 | if (update) { |
| 1624 | if (!clp_used_exchangeid(conf)) { /* buggy client */ |
J. Bruce Fields | 2dbb269 | 2012-05-14 09:47:11 -0400 | [diff] [blame] | 1625 | status = nfserr_inval; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1626 | goto out; |
| 1627 | } |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 1628 | if (!creds_match) { /* case 9 */ |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1629 | status = nfserr_perm; |
| 1630 | goto out; |
| 1631 | } |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 1632 | if (!verfs_match) { /* case 8 */ |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1633 | status = nfserr_not_same; |
| 1634 | goto out; |
| 1635 | } |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 1636 | /* case 6 */ |
| 1637 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; |
| 1638 | new = conf; |
| 1639 | goto out_copy; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1640 | } |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 1641 | if (!creds_match) { /* case 3 */ |
J. Bruce Fields | 631fc9e | 2012-05-14 15:57:23 -0400 | [diff] [blame] | 1642 | if (client_has_state(conf)) { |
| 1643 | status = nfserr_clid_inuse; |
| 1644 | goto out; |
| 1645 | } |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1646 | expire_client(conf); |
| 1647 | goto out_new; |
| 1648 | } |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 1649 | if (verfs_match) { /* case 2 */ |
J. Bruce Fields | 0f1ba0e | 2012-05-25 21:24:40 -0400 | [diff] [blame] | 1650 | conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 1651 | new = conf; |
| 1652 | goto out_copy; |
| 1653 | } |
| 1654 | /* case 5, client reboot */ |
J. Bruce Fields | 136e658 | 2012-05-12 20:37:23 -0400 | [diff] [blame] | 1655 | goto out_new; |
Mike Sager | 6ddbbbf | 2009-06-16 04:20:47 +0300 | [diff] [blame] | 1656 | } |
| 1657 | |
J. Bruce Fields | 2dbb269 | 2012-05-14 09:47:11 -0400 | [diff] [blame] | 1658 | if (update) { /* case 7 */ |
Mike Sager | 6ddbbbf | 2009-06-16 04:20:47 +0300 | [diff] [blame] | 1659 | status = nfserr_noent; |
| 1660 | goto out; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1661 | } |
| 1662 | |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 1663 | unconf = find_unconfirmed_client_by_name(&exid->clname, nn); |
J. Bruce Fields | 2dbb269 | 2012-05-14 09:47:11 -0400 | [diff] [blame] | 1664 | if (unconf) /* case 4, possible retry or client restart */ |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1665 | expire_client(unconf); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1666 | |
J. Bruce Fields | 2dbb269 | 2012-05-14 09:47:11 -0400 | [diff] [blame] | 1667 | /* case 1 (normal case) */ |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1668 | out_new: |
Jeff Layton | 2216d44 | 2012-11-12 15:00:57 -0500 | [diff] [blame] | 1669 | new = create_client(exid->clname, rqstp, &verf); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1670 | if (new == NULL) { |
J. Bruce Fields | 4731030 | 2010-06-22 16:17:12 -0400 | [diff] [blame] | 1671 | status = nfserr_jukebox; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1672 | goto out; |
| 1673 | } |
J. Bruce Fields | c116a0a | 2012-09-11 14:53:09 -0400 | [diff] [blame] | 1674 | new->cl_minorversion = 1; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1675 | |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 1676 | gen_clid(new, nn); |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 1677 | add_to_unconfirmed(new); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1678 | out_copy: |
| 1679 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; |
| 1680 | exid->clientid.cl_id = new->cl_clientid.cl_id; |
| 1681 | |
J. Bruce Fields | 778df3f | 2012-05-25 21:40:23 -0400 | [diff] [blame] | 1682 | exid->seqid = new->cl_cs_slot.sl_seqid + 1; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1683 | nfsd4_set_ex_flags(new, exid); |
| 1684 | |
| 1685 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1686 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1687 | status = nfs_ok; |
| 1688 | |
| 1689 | out: |
| 1690 | nfs4_unlock_state(); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1691 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1692 | } |
| 1693 | |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 1694 | static __be32 |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1695 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1696 | { |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1697 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
| 1698 | slot_seqid); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1699 | |
| 1700 | /* The slot is in use, and no response has been sent. */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1701 | if (slot_inuse) { |
| 1702 | if (seqid == slot_seqid) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1703 | return nfserr_jukebox; |
| 1704 | else |
| 1705 | return nfserr_seq_misordered; |
| 1706 | } |
J. Bruce Fields | f6d8248 | 2012-02-13 16:13:41 -0500 | [diff] [blame] | 1707 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1708 | if (likely(seqid == slot_seqid + 1)) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1709 | return nfs_ok; |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1710 | if (seqid == slot_seqid) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1711 | return nfserr_replay_cache; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1712 | return nfserr_seq_misordered; |
| 1713 | } |
| 1714 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1715 | /* |
| 1716 | * Cache the create session result into the create session single DRC |
| 1717 | * slot cache by saving the xdr structure. sl_seqid has been set. |
| 1718 | * Do this for solo or embedded create session operations. |
| 1719 | */ |
| 1720 | static void |
| 1721 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 1722 | struct nfsd4_clid_slot *slot, __be32 nfserr) |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1723 | { |
| 1724 | slot->sl_status = nfserr; |
| 1725 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); |
| 1726 | } |
| 1727 | |
| 1728 | static __be32 |
| 1729 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, |
| 1730 | struct nfsd4_clid_slot *slot) |
| 1731 | { |
| 1732 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); |
| 1733 | return slot->sl_status; |
| 1734 | } |
| 1735 | |
Mi Jinlong | 1b74c25 | 2011-07-14 14:50:17 +0800 | [diff] [blame] | 1736 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
| 1737 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ |
| 1738 | 1 + /* MIN tag is length with zero, only length */ \ |
| 1739 | 3 + /* version, opcount, opcode */ \ |
| 1740 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ |
| 1741 | /* seqid, slotID, slotID, cache */ \ |
| 1742 | 4 ) * sizeof(__be32)) |
| 1743 | |
| 1744 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ |
| 1745 | 2 + /* verifier: AUTH_NULL, length 0 */\ |
| 1746 | 1 + /* status */ \ |
| 1747 | 1 + /* MIN tag is length with zero, only length */ \ |
| 1748 | 3 + /* opcount, opcode, opstatus*/ \ |
| 1749 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ |
| 1750 | /* seqid, slotID, slotID, slotID, status */ \ |
| 1751 | 5 ) * sizeof(__be32)) |
| 1752 | |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 1753 | static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
Mi Jinlong | 1b74c25 | 2011-07-14 14:50:17 +0800 | [diff] [blame] | 1754 | { |
| 1755 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ |
| 1756 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; |
| 1757 | } |
| 1758 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1759 | __be32 |
| 1760 | nfsd4_create_session(struct svc_rqst *rqstp, |
| 1761 | struct nfsd4_compound_state *cstate, |
| 1762 | struct nfsd4_create_session *cr_ses) |
| 1763 | { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1764 | struct sockaddr *sa = svc_addr(rqstp); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1765 | struct nfs4_client *conf, *unconf; |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 1766 | struct nfsd4_session *new; |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 1767 | struct nfsd4_conn *conn; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1768 | struct nfsd4_clid_slot *cs_slot = NULL; |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 1769 | __be32 status = 0; |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 1770 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1771 | |
Mi Jinlong | a62573d | 2011-03-23 17:57:07 +0800 | [diff] [blame] | 1772 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
| 1773 | return nfserr_inval; |
J. Bruce Fields | 4973050 | 2012-09-11 15:33:21 -0400 | [diff] [blame] | 1774 | if (check_forechannel_attrs(cr_ses->fore_channel)) |
| 1775 | return nfserr_toosmall; |
Stanislav Kinsbursky | 9dd9845 | 2012-12-06 14:23:24 +0300 | [diff] [blame] | 1776 | new = alloc_session(&cr_ses->fore_channel, nn); |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 1777 | if (!new) |
| 1778 | return nfserr_jukebox; |
| 1779 | status = nfserr_jukebox; |
| 1780 | conn = alloc_conn_from_crses(rqstp, cr_ses); |
| 1781 | if (!conn) |
| 1782 | goto out_free_session; |
Mi Jinlong | a62573d | 2011-03-23 17:57:07 +0800 | [diff] [blame] | 1783 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1784 | nfs4_lock_state(); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 1785 | unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 1786 | conf = find_confirmed_client(&cr_ses->clientid, true, nn); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1787 | |
| 1788 | if (conf) { |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1789 | cs_slot = &conf->cl_cs_slot; |
| 1790 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1791 | if (status == nfserr_replay_cache) { |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1792 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 1793 | goto out_free_conn; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1794 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1795 | status = nfserr_seq_misordered; |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 1796 | goto out_free_conn; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1797 | } |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1798 | } else if (unconf) { |
J. Bruce Fields | 8f9d3d3 | 2012-09-12 14:41:31 -0400 | [diff] [blame] | 1799 | struct nfs4_client *old; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1800 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1801 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1802 | status = nfserr_clid_inuse; |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 1803 | goto out_free_conn; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1804 | } |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1805 | cs_slot = &unconf->cl_cs_slot; |
| 1806 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1807 | if (status) { |
| 1808 | /* an unconfirmed replay returns misordered */ |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1809 | status = nfserr_seq_misordered; |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 1810 | goto out_free_conn; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1811 | } |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 1812 | old = find_confirmed_client_by_name(&unconf->cl_name, nn); |
J. Bruce Fields | 8f9d3d3 | 2012-09-12 14:41:31 -0400 | [diff] [blame] | 1813 | if (old) |
| 1814 | expire_client(old); |
| 1815 | move_to_confirmed(unconf); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1816 | conf = unconf; |
| 1817 | } else { |
| 1818 | status = nfserr_stale_clientid; |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 1819 | goto out_free_conn; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1820 | } |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 1821 | status = nfs_ok; |
J. Bruce Fields | 8323c3b | 2010-10-19 19:36:51 -0400 | [diff] [blame] | 1822 | /* |
J. Bruce Fields | 408b79b | 2010-04-15 15:11:09 -0400 | [diff] [blame] | 1823 | * We do not support RDMA or persistent sessions |
| 1824 | */ |
| 1825 | cr_ses->flags &= ~SESSION4_PERSIST; |
| 1826 | cr_ses->flags &= ~SESSION4_RDMA; |
| 1827 | |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 1828 | init_session(rqstp, new, conf, cr_ses); |
| 1829 | nfsd4_init_conn(rqstp, conn, new); |
| 1830 | |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 1831 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1832 | NFS4_MAX_SESSIONID_LEN); |
Mi Jinlong | 1205065 | 2010-11-11 18:03:40 +0800 | [diff] [blame] | 1833 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
| 1834 | sizeof(struct nfsd4_channel_attrs)); |
J. Bruce Fields | 86c3e16 | 2010-10-02 17:04:00 -0400 | [diff] [blame] | 1835 | cs_slot->sl_seqid++; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1836 | cr_ses->seqid = cs_slot->sl_seqid; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1837 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1838 | /* cache solo and embedded create sessions under the state lock */ |
| 1839 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1840 | nfs4_unlock_state(); |
Yanchuan Nian | 266533c | 2012-12-24 18:11:45 +0800 | [diff] [blame] | 1841 | out: |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1842 | dprintk("%s returns %d\n", __func__, ntohl(status)); |
| 1843 | return status; |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 1844 | out_free_conn: |
Yanchuan Nian | 266533c | 2012-12-24 18:11:45 +0800 | [diff] [blame] | 1845 | nfs4_unlock_state(); |
J. Bruce Fields | 81f0b2a | 2012-09-12 11:04:33 -0400 | [diff] [blame] | 1846 | free_conn(conn); |
| 1847 | out_free_session: |
| 1848 | __free_session(new); |
| 1849 | goto out; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1850 | } |
| 1851 | |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 1852 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
| 1853 | { |
| 1854 | switch (*dir) { |
| 1855 | case NFS4_CDFC4_FORE: |
| 1856 | case NFS4_CDFC4_BACK: |
| 1857 | return nfs_ok; |
| 1858 | case NFS4_CDFC4_FORE_OR_BOTH: |
| 1859 | case NFS4_CDFC4_BACK_OR_BOTH: |
| 1860 | *dir = NFS4_CDFC4_BOTH; |
| 1861 | return nfs_ok; |
| 1862 | }; |
| 1863 | return nfserr_inval; |
| 1864 | } |
| 1865 | |
J. Bruce Fields | cb73a9f | 2012-11-01 18:09:48 -0400 | [diff] [blame] | 1866 | __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) |
| 1867 | { |
| 1868 | struct nfsd4_session *session = cstate->session; |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1869 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
J. Bruce Fields | cb73a9f | 2012-11-01 18:09:48 -0400 | [diff] [blame] | 1870 | |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1871 | spin_lock(&nn->client_lock); |
J. Bruce Fields | cb73a9f | 2012-11-01 18:09:48 -0400 | [diff] [blame] | 1872 | session->se_cb_prog = bc->bc_cb_program; |
| 1873 | session->se_cb_sec = bc->bc_cb_sec; |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1874 | spin_unlock(&nn->client_lock); |
J. Bruce Fields | cb73a9f | 2012-11-01 18:09:48 -0400 | [diff] [blame] | 1875 | |
| 1876 | nfsd4_probe_callback(session->se_client); |
| 1877 | |
| 1878 | return nfs_ok; |
| 1879 | } |
| 1880 | |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 1881 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
| 1882 | struct nfsd4_compound_state *cstate, |
| 1883 | struct nfsd4_bind_conn_to_session *bcts) |
| 1884 | { |
| 1885 | __be32 status; |
J. Bruce Fields | 3ba6367 | 2012-09-11 15:37:40 -0400 | [diff] [blame] | 1886 | struct nfsd4_conn *conn; |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1887 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 1888 | |
| 1889 | if (!nfsd4_last_compound_op(rqstp)) |
| 1890 | return nfserr_not_only_op; |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1891 | spin_lock(&nn->client_lock); |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 1892 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 1893 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires |
| 1894 | * client_lock iself: */ |
| 1895 | if (cstate->session) { |
| 1896 | nfsd4_get_session(cstate->session); |
| 1897 | atomic_inc(&cstate->session->se_client->cl_refcount); |
| 1898 | } |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1899 | spin_unlock(&nn->client_lock); |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 1900 | if (!cstate->session) |
| 1901 | return nfserr_badsession; |
| 1902 | |
| 1903 | status = nfsd4_map_bcts_dir(&bcts->dir); |
J. Bruce Fields | 3ba6367 | 2012-09-11 15:37:40 -0400 | [diff] [blame] | 1904 | if (status) |
| 1905 | return status; |
| 1906 | conn = alloc_conn(rqstp, bcts->dir); |
| 1907 | if (!conn) |
| 1908 | return nfserr_jukebox; |
J. Bruce Fields | e1ff371 | 2012-09-11 17:10:25 -0400 | [diff] [blame] | 1909 | nfsd4_init_conn(rqstp, conn, cstate->session); |
J. Bruce Fields | 3ba6367 | 2012-09-11 15:37:40 -0400 | [diff] [blame] | 1910 | return nfs_ok; |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 1911 | } |
| 1912 | |
J. Bruce Fields | 5d4cec2 | 2010-05-01 12:56:06 -0400 | [diff] [blame] | 1913 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
| 1914 | { |
| 1915 | if (!session) |
| 1916 | return 0; |
| 1917 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); |
| 1918 | } |
| 1919 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1920 | __be32 |
| 1921 | nfsd4_destroy_session(struct svc_rqst *r, |
| 1922 | struct nfsd4_compound_state *cstate, |
| 1923 | struct nfsd4_destroy_session *sessionid) |
| 1924 | { |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1925 | struct nfsd4_session *ses; |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 1926 | __be32 status = nfserr_badsession; |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1927 | struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1928 | |
| 1929 | /* Notes: |
| 1930 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid |
| 1931 | * - Should we return nfserr_back_chan_busy if waiting for |
| 1932 | * callbacks on to-be-destroyed session? |
| 1933 | * - Do we need to clear any callback info from previous session? |
| 1934 | */ |
| 1935 | |
J. Bruce Fields | 5d4cec2 | 2010-05-01 12:56:06 -0400 | [diff] [blame] | 1936 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
J. Bruce Fields | 5771635 | 2010-04-21 12:27:19 -0400 | [diff] [blame] | 1937 | if (!nfsd4_last_compound_op(r)) |
| 1938 | return nfserr_not_only_op; |
| 1939 | } |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1940 | dump_sessionid(__func__, &sessionid->sessionid); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1941 | spin_lock(&nn->client_lock); |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 1942 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1943 | if (!ses) { |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1944 | spin_unlock(&nn->client_lock); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1945 | goto out; |
| 1946 | } |
| 1947 | |
| 1948 | unhash_session(ses); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1949 | spin_unlock(&nn->client_lock); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1950 | |
Benny Halevy | ab707e15 | 2010-05-12 00:14:06 +0300 | [diff] [blame] | 1951 | nfs4_lock_state(); |
J. Bruce Fields | 84f5f7c | 2010-12-09 15:52:19 -0500 | [diff] [blame] | 1952 | nfsd4_probe_callback_sync(ses->se_client); |
Benny Halevy | ab707e15 | 2010-05-12 00:14:06 +0300 | [diff] [blame] | 1953 | nfs4_unlock_state(); |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 1954 | |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1955 | spin_lock(&nn->client_lock); |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 1956 | nfsd4_del_conns(ses); |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 1957 | nfsd4_put_session_locked(ses); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 1958 | spin_unlock(&nn->client_lock); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1959 | status = nfs_ok; |
| 1960 | out: |
| 1961 | dprintk("%s returns %d\n", __func__, ntohl(status)); |
| 1962 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1963 | } |
| 1964 | |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 1965 | 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] | 1966 | { |
| 1967 | struct nfsd4_conn *c; |
| 1968 | |
| 1969 | list_for_each_entry(c, &s->se_conns, cn_persession) { |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 1970 | if (c->cn_xprt == xpt) { |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 1971 | return c; |
| 1972 | } |
| 1973 | } |
| 1974 | return NULL; |
| 1975 | } |
| 1976 | |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 1977 | static void 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] | 1978 | { |
| 1979 | struct nfs4_client *clp = ses->se_client; |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 1980 | struct nfsd4_conn *c; |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 1981 | int ret; |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 1982 | |
| 1983 | spin_lock(&clp->cl_lock); |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 1984 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 1985 | if (c) { |
| 1986 | spin_unlock(&clp->cl_lock); |
| 1987 | free_conn(new); |
| 1988 | return; |
| 1989 | } |
| 1990 | __nfsd4_hash_conn(new, ses); |
| 1991 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 1992 | ret = nfsd4_register_conn(new); |
| 1993 | if (ret) |
| 1994 | /* oops; xprt is already down: */ |
| 1995 | nfsd4_conn_lost(&new->cn_xpt_user); |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 1996 | return; |
| 1997 | } |
| 1998 | |
Mi Jinlong | 868b89c | 2011-04-27 09:09:58 +0800 | [diff] [blame] | 1999 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
| 2000 | { |
| 2001 | struct nfsd4_compoundargs *args = rqstp->rq_argp; |
| 2002 | |
| 2003 | return args->opcnt > session->se_fchannel.maxops; |
| 2004 | } |
| 2005 | |
Mi Jinlong | ae82a8d | 2011-07-14 14:56:02 +0800 | [diff] [blame] | 2006 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
| 2007 | struct nfsd4_session *session) |
| 2008 | { |
| 2009 | struct xdr_buf *xb = &rqstp->rq_arg; |
| 2010 | |
| 2011 | return xb->len > session->se_fchannel.maxreq_sz; |
| 2012 | } |
| 2013 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2014 | __be32 |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2015 | nfsd4_sequence(struct svc_rqst *rqstp, |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2016 | struct nfsd4_compound_state *cstate, |
| 2017 | struct nfsd4_sequence *seq) |
| 2018 | { |
Andy Adamson | f9bb94c | 2009-04-03 08:28:12 +0300 | [diff] [blame] | 2019 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2020 | struct nfsd4_session *session; |
| 2021 | struct nfsd4_slot *slot; |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 2022 | struct nfsd4_conn *conn; |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 2023 | __be32 status; |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 2024 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2025 | |
Andy Adamson | f9bb94c | 2009-04-03 08:28:12 +0300 | [diff] [blame] | 2026 | if (resp->opcnt != 1) |
| 2027 | return nfserr_sequence_pos; |
| 2028 | |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 2029 | /* |
| 2030 | * Will be either used or freed by nfsd4_sequence_check_conn |
| 2031 | * below. |
| 2032 | */ |
| 2033 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); |
| 2034 | if (!conn) |
| 2035 | return nfserr_jukebox; |
| 2036 | |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 2037 | spin_lock(&nn->client_lock); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2038 | status = nfserr_badsession; |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 2039 | session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2040 | if (!session) |
| 2041 | goto out; |
| 2042 | |
Mi Jinlong | 868b89c | 2011-04-27 09:09:58 +0800 | [diff] [blame] | 2043 | status = nfserr_too_many_ops; |
| 2044 | if (nfsd4_session_too_many_ops(rqstp, session)) |
| 2045 | goto out; |
| 2046 | |
Mi Jinlong | ae82a8d | 2011-07-14 14:56:02 +0800 | [diff] [blame] | 2047 | status = nfserr_req_too_big; |
| 2048 | if (nfsd4_request_too_big(rqstp, session)) |
| 2049 | goto out; |
| 2050 | |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2051 | status = nfserr_badslot; |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 2052 | if (seq->slotid >= session->se_fchannel.maxreqs) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2053 | goto out; |
| 2054 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 2055 | slot = session->se_slots[seq->slotid]; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2056 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
| 2057 | |
Andy Adamson | a8dfdae | 2009-08-28 08:45:02 -0400 | [diff] [blame] | 2058 | /* We do not negotiate the number of slots yet, so set the |
| 2059 | * maxslots to the session maxreqs which is used to encode |
| 2060 | * sr_highest_slotid and the sr_target_slot id to maxslots */ |
| 2061 | seq->maxslots = session->se_fchannel.maxreqs; |
| 2062 | |
J. Bruce Fields | 73e7948 | 2012-02-13 16:39:00 -0500 | [diff] [blame] | 2063 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
| 2064 | slot->sl_flags & NFSD4_SLOT_INUSE); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2065 | if (status == nfserr_replay_cache) { |
J. Bruce Fields | bf5c43c | 2012-02-13 16:56:19 -0500 | [diff] [blame] | 2066 | status = nfserr_seq_misordered; |
| 2067 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) |
| 2068 | goto out; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2069 | cstate->slot = slot; |
| 2070 | cstate->session = session; |
Andy Adamson | da3846a | 2009-04-03 08:28:22 +0300 | [diff] [blame] | 2071 | /* Return the cached reply status and set cstate->status |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 2072 | * for nfsd4_proc_compound processing */ |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 2073 | status = nfsd4_replay_cache_entry(resp, seq); |
Andy Adamson | da3846a | 2009-04-03 08:28:22 +0300 | [diff] [blame] | 2074 | cstate->status = nfserr_replay_cache; |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 2075 | goto out; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2076 | } |
| 2077 | if (status) |
| 2078 | goto out; |
| 2079 | |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 2080 | nfsd4_sequence_check_conn(conn, session); |
| 2081 | conn = NULL; |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 2082 | |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2083 | /* Success! bump slot seqid */ |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2084 | slot->sl_seqid = seq->seqid; |
J. Bruce Fields | bf5c43c | 2012-02-13 16:56:19 -0500 | [diff] [blame] | 2085 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
J. Bruce Fields | 73e7948 | 2012-02-13 16:39:00 -0500 | [diff] [blame] | 2086 | if (seq->cachethis) |
| 2087 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; |
J. Bruce Fields | bf5c43c | 2012-02-13 16:56:19 -0500 | [diff] [blame] | 2088 | else |
| 2089 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2090 | |
| 2091 | cstate->slot = slot; |
| 2092 | cstate->session = session; |
| 2093 | |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2094 | out: |
J. Bruce Fields | 26c0c75 | 2010-04-24 15:35:43 -0400 | [diff] [blame] | 2095 | /* Hold a session reference until done processing the compound. */ |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 2096 | if (cstate->session) { |
J. Bruce Fields | 0d7bb71 | 2010-11-18 08:30:33 -0500 | [diff] [blame] | 2097 | struct nfs4_client *clp = session->se_client; |
| 2098 | |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 2099 | nfsd4_get_session(cstate->session); |
J. Bruce Fields | 0d7bb71 | 2010-11-18 08:30:33 -0500 | [diff] [blame] | 2100 | atomic_inc(&clp->cl_refcount); |
Benny Halevy | 5423732 | 2011-10-19 19:12:58 -0700 | [diff] [blame] | 2101 | switch (clp->cl_cb_state) { |
| 2102 | case NFSD4_CB_DOWN: |
Benny Halevy | fc0c3dd | 2011-10-19 19:13:06 -0700 | [diff] [blame] | 2103 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
Benny Halevy | 5423732 | 2011-10-19 19:12:58 -0700 | [diff] [blame] | 2104 | break; |
| 2105 | case NFSD4_CB_FAULT: |
Benny Halevy | fc0c3dd | 2011-10-19 19:13:06 -0700 | [diff] [blame] | 2106 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
Benny Halevy | 5423732 | 2011-10-19 19:12:58 -0700 | [diff] [blame] | 2107 | break; |
Benny Halevy | fc0c3dd | 2011-10-19 19:13:06 -0700 | [diff] [blame] | 2108 | default: |
| 2109 | seq->status_flags = 0; |
Benny Halevy | 5423732 | 2011-10-19 19:12:58 -0700 | [diff] [blame] | 2110 | } |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 2111 | } |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 2112 | kfree(conn); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 2113 | spin_unlock(&nn->client_lock); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2114 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
| 2115 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2116 | } |
| 2117 | |
Mi Jinlong | 345c284 | 2011-10-20 17:51:39 +0800 | [diff] [blame] | 2118 | __be32 |
| 2119 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) |
| 2120 | { |
| 2121 | struct nfs4_client *conf, *unconf, *clp; |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 2122 | __be32 status = 0; |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 2123 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Mi Jinlong | 345c284 | 2011-10-20 17:51:39 +0800 | [diff] [blame] | 2124 | |
| 2125 | nfs4_lock_state(); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 2126 | unconf = find_unconfirmed_client(&dc->clientid, true, nn); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 2127 | conf = find_confirmed_client(&dc->clientid, true, nn); |
Mi Jinlong | 345c284 | 2011-10-20 17:51:39 +0800 | [diff] [blame] | 2128 | |
| 2129 | if (conf) { |
| 2130 | clp = conf; |
| 2131 | |
J. Bruce Fields | 6eccece | 2012-05-29 16:37:44 -0400 | [diff] [blame] | 2132 | if (!is_client_expired(conf) && client_has_state(conf)) { |
Mi Jinlong | 345c284 | 2011-10-20 17:51:39 +0800 | [diff] [blame] | 2133 | status = nfserr_clientid_busy; |
| 2134 | goto out; |
| 2135 | } |
| 2136 | |
| 2137 | /* rfc5661 18.50.3 */ |
| 2138 | if (cstate->session && conf == cstate->session->se_client) { |
| 2139 | status = nfserr_clientid_busy; |
| 2140 | goto out; |
| 2141 | } |
| 2142 | } else if (unconf) |
| 2143 | clp = unconf; |
| 2144 | else { |
| 2145 | status = nfserr_stale_clientid; |
| 2146 | goto out; |
| 2147 | } |
| 2148 | |
| 2149 | expire_client(clp); |
| 2150 | out: |
| 2151 | nfs4_unlock_state(); |
| 2152 | dprintk("%s return %d\n", __func__, ntohl(status)); |
| 2153 | return status; |
| 2154 | } |
| 2155 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2156 | __be32 |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 2157 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) |
| 2158 | { |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 2159 | __be32 status = 0; |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2160 | |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 2161 | if (rc->rca_one_fs) { |
| 2162 | if (!cstate->current_fh.fh_dentry) |
| 2163 | return nfserr_nofilehandle; |
| 2164 | /* |
| 2165 | * We don't take advantage of the rca_one_fs case. |
| 2166 | * That's OK, it's optional, we can safely ignore it. |
| 2167 | */ |
| 2168 | return nfs_ok; |
| 2169 | } |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2170 | |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 2171 | nfs4_lock_state(); |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2172 | status = nfserr_complete_already; |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 2173 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
| 2174 | &cstate->session->se_client->cl_flags)) |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2175 | goto out; |
| 2176 | |
| 2177 | status = nfserr_stale_clientid; |
| 2178 | if (is_client_expired(cstate->session->se_client)) |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 2179 | /* |
| 2180 | * The following error isn't really legal. |
| 2181 | * But we only get here if the client just explicitly |
| 2182 | * destroyed the client. Surely it no longer cares what |
| 2183 | * error it gets back on an operation for the dead |
| 2184 | * client. |
| 2185 | */ |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2186 | goto out; |
| 2187 | |
| 2188 | status = nfs_ok; |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 2189 | nfsd4_client_record_create(cstate->session->se_client); |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2190 | out: |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 2191 | nfs4_unlock_state(); |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2192 | return status; |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 2193 | } |
| 2194 | |
| 2195 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 2196 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 2197 | struct nfsd4_setclientid *setclid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2198 | { |
J. Bruce Fields | a084daf | 2011-10-10 15:07:40 -0400 | [diff] [blame] | 2199 | struct xdr_netobj clname = setclid->se_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | nfs4_verifier clverifier = setclid->se_verf; |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 2201 | struct nfs4_client *conf, *unconf, *new; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2202 | __be32 status; |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 2203 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| 2204 | |
J. Bruce Fields | 63db463 | 2012-05-18 21:54:19 -0400 | [diff] [blame] | 2205 | /* Cases below refer to rfc 3530 section 14.2.33: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2206 | nfs4_lock_state(); |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 2207 | conf = find_confirmed_client_by_name(&clname, nn); |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 2208 | if (conf) { |
J. Bruce Fields | 63db463 | 2012-05-18 21:54:19 -0400 | [diff] [blame] | 2209 | /* case 0: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2210 | status = nfserr_clid_inuse; |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 2211 | if (clp_used_exchangeid(conf)) |
| 2212 | goto out; |
J. Bruce Fields | 026722c | 2009-03-18 15:06:26 -0400 | [diff] [blame] | 2213 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 2214 | char addr_str[INET6_ADDRSTRLEN]; |
| 2215 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, |
| 2216 | sizeof(addr_str)); |
| 2217 | dprintk("NFSD: setclientid: string in use by client " |
| 2218 | "at %s\n", addr_str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | goto out; |
| 2220 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2221 | } |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 2222 | unconf = find_unconfirmed_client_by_name(&clname, nn); |
J. Bruce Fields | 8f93071 | 2012-05-18 22:06:41 -0400 | [diff] [blame] | 2223 | if (unconf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2224 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | status = nfserr_jukebox; |
Jeff Layton | 2216d44 | 2012-11-12 15:00:57 -0500 | [diff] [blame] | 2226 | new = create_client(clname, rqstp, &clverifier); |
J. Bruce Fields | 8f93071 | 2012-05-18 22:06:41 -0400 | [diff] [blame] | 2227 | if (new == NULL) |
| 2228 | goto out; |
J. Bruce Fields | 34b232b | 2012-05-18 22:23:42 -0400 | [diff] [blame] | 2229 | if (conf && same_verf(&conf->cl_verifier, &clverifier)) |
J. Bruce Fields | 63db463 | 2012-05-18 21:54:19 -0400 | [diff] [blame] | 2230 | /* case 1: probable callback update */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | copy_clid(new, conf); |
J. Bruce Fields | 34b232b | 2012-05-18 22:23:42 -0400 | [diff] [blame] | 2232 | else /* case 4 (new client) or cases 2, 3 (client reboot): */ |
Stanislav Kinsbursky | c212cec | 2012-11-14 18:21:10 +0300 | [diff] [blame] | 2233 | gen_clid(new, nn); |
J. Bruce Fields | 8323c3b | 2010-10-19 19:36:51 -0400 | [diff] [blame] | 2234 | new->cl_minorversion = 0; |
Takuma Umeya | 6f3d772 | 2010-12-15 14:09:01 +0900 | [diff] [blame] | 2235 | gen_callback(new, setclid, rqstp); |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 2236 | add_to_unconfirmed(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2237 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
| 2238 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; |
| 2239 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); |
| 2240 | status = nfs_ok; |
| 2241 | out: |
| 2242 | nfs4_unlock_state(); |
| 2243 | return status; |
| 2244 | } |
| 2245 | |
| 2246 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2247 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 2248 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
| 2249 | struct nfsd4_compound_state *cstate, |
| 2250 | struct nfsd4_setclientid_confirm *setclientid_confirm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | { |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 2252 | struct nfs4_client *conf, *unconf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
| 2254 | clientid_t * clid = &setclientid_confirm->sc_clientid; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2255 | __be32 status; |
Stanislav Kinsbursky | 7f2210f | 2012-11-14 18:21:05 +0300 | [diff] [blame] | 2256 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2257 | |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 2258 | if (STALE_CLIENTID(clid, nn)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | return nfserr_stale_clientid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | nfs4_lock_state(); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 2261 | |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 2262 | conf = find_confirmed_client(clid, false, nn); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 2263 | unconf = find_unconfirmed_client(clid, false, nn); |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2264 | /* |
J. Bruce Fields | 8695b90 | 2012-05-19 10:05:58 -0400 | [diff] [blame] | 2265 | * We try hard to give out unique clientid's, so if we get an |
| 2266 | * attempt to confirm the same clientid with a different cred, |
| 2267 | * there's a bug somewhere. Let's charitably assume it's our |
| 2268 | * bug. |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2269 | */ |
J. Bruce Fields | 8695b90 | 2012-05-19 10:05:58 -0400 | [diff] [blame] | 2270 | status = nfserr_serverfault; |
| 2271 | if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) |
| 2272 | goto out; |
| 2273 | if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
| 2274 | goto out; |
J. Bruce Fields | 63db463 | 2012-05-18 21:54:19 -0400 | [diff] [blame] | 2275 | /* cases below refer to rfc 3530 section 14.2.34: */ |
J. Bruce Fields | 90d700b | 2012-05-19 13:55:22 -0400 | [diff] [blame] | 2276 | if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { |
| 2277 | if (conf && !unconf) /* case 2: probable retransmit */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | status = nfs_ok; |
J. Bruce Fields | 90d700b | 2012-05-19 13:55:22 -0400 | [diff] [blame] | 2279 | else /* case 4: client hasn't noticed we rebooted yet? */ |
| 2280 | status = nfserr_stale_clientid; |
| 2281 | goto out; |
| 2282 | } |
| 2283 | status = nfs_ok; |
| 2284 | if (conf) { /* case 1: callback update */ |
J. Bruce Fields | 8695b90 | 2012-05-19 10:05:58 -0400 | [diff] [blame] | 2285 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
| 2286 | nfsd4_probe_callback(conf); |
| 2287 | expire_client(unconf); |
J. Bruce Fields | 90d700b | 2012-05-19 13:55:22 -0400 | [diff] [blame] | 2288 | } else { /* case 3: normal case; new or rebooted client */ |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 2289 | conf = find_confirmed_client_by_name(&unconf->cl_name, nn); |
J. Bruce Fields | 0d22f68 | 2012-09-26 11:36:16 -0400 | [diff] [blame] | 2290 | if (conf) |
J. Bruce Fields | 8695b90 | 2012-05-19 10:05:58 -0400 | [diff] [blame] | 2291 | expire_client(conf); |
J. Bruce Fields | 8695b90 | 2012-05-19 10:05:58 -0400 | [diff] [blame] | 2292 | move_to_confirmed(unconf); |
J. Bruce Fields | f3d03b9 | 2012-05-23 11:38:38 -0400 | [diff] [blame] | 2293 | nfsd4_probe_callback(unconf); |
NeilBrown | 08e8987 | 2005-06-23 22:04:11 -0700 | [diff] [blame] | 2294 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2295 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2296 | nfs4_unlock_state(); |
| 2297 | return status; |
| 2298 | } |
| 2299 | |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 2300 | static struct nfs4_file *nfsd4_alloc_file(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | { |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 2302 | return kmem_cache_alloc(file_slab, GFP_KERNEL); |
| 2303 | } |
| 2304 | |
| 2305 | /* OPEN Share state helper functions */ |
| 2306 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
| 2307 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2308 | unsigned int hashval = file_hashval(ino); |
| 2309 | |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 2310 | atomic_set(&fp->fi_ref, 1); |
| 2311 | INIT_LIST_HEAD(&fp->fi_hash); |
| 2312 | INIT_LIST_HEAD(&fp->fi_stateids); |
| 2313 | INIT_LIST_HEAD(&fp->fi_delegations); |
| 2314 | fp->fi_inode = igrab(ino); |
| 2315 | fp->fi_had_conflict = false; |
| 2316 | fp->fi_lease = NULL; |
| 2317 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
| 2318 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); |
| 2319 | spin_lock(&recall_lock); |
| 2320 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
| 2321 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2322 | } |
| 2323 | |
| 2324 | static void |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 2325 | nfsd4_free_slab(struct kmem_cache **slab) |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2326 | { |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2327 | if (*slab == NULL) |
| 2328 | return; |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 2329 | kmem_cache_destroy(*slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2330 | *slab = NULL; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2331 | } |
| 2332 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 2333 | void |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2334 | nfsd4_free_slabs(void) |
| 2335 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2336 | nfsd4_free_slab(&openowner_slab); |
| 2337 | nfsd4_free_slab(&lockowner_slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2338 | nfsd4_free_slab(&file_slab); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2339 | nfsd4_free_slab(&stateid_slab); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 2340 | nfsd4_free_slab(&deleg_slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2341 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2342 | |
Bryan Schumaker | 7208339 | 2011-11-01 15:24:59 -0400 | [diff] [blame] | 2343 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2344 | nfsd4_init_slabs(void) |
| 2345 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2346 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
| 2347 | sizeof(struct nfs4_openowner), 0, 0, NULL); |
| 2348 | if (openowner_slab == NULL) |
| 2349 | goto out_nomem; |
| 2350 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
Yanchuan Nian | 3c40794 | 2012-10-24 14:44:19 +0800 | [diff] [blame] | 2351 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2352 | if (lockowner_slab == NULL) |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2353 | goto out_nomem; |
| 2354 | file_slab = kmem_cache_create("nfsd4_files", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 2355 | sizeof(struct nfs4_file), 0, 0, NULL); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2356 | if (file_slab == NULL) |
| 2357 | goto out_nomem; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2358 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 2359 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2360 | if (stateid_slab == NULL) |
| 2361 | goto out_nomem; |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 2362 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 2363 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 2364 | if (deleg_slab == NULL) |
| 2365 | goto out_nomem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2366 | return 0; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2367 | out_nomem: |
| 2368 | nfsd4_free_slabs(); |
| 2369 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
| 2370 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2371 | } |
| 2372 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2373 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2374 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2375 | kfree(oo->oo_owner.so_owner.data); |
| 2376 | kmem_cache_free(openowner_slab, oo); |
| 2377 | } |
| 2378 | |
| 2379 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) |
| 2380 | { |
| 2381 | kfree(lo->lo_owner.so_owner.data); |
| 2382 | kmem_cache_free(lockowner_slab, lo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2383 | } |
| 2384 | |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 2385 | static void init_nfs4_replay(struct nfs4_replay *rp) |
| 2386 | { |
| 2387 | rp->rp_status = nfserr_serverfault; |
| 2388 | rp->rp_buflen = 0; |
| 2389 | rp->rp_buf = rp->rp_ibuf; |
| 2390 | } |
| 2391 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2392 | 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] | 2393 | { |
| 2394 | struct nfs4_stateowner *sop; |
| 2395 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2396 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 2397 | if (!sop) |
| 2398 | return NULL; |
| 2399 | |
| 2400 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); |
| 2401 | if (!sop->so_owner.data) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2402 | kmem_cache_free(slab, sop); |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 2403 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | } |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 2405 | sop->so_owner.len = owner->len; |
| 2406 | |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 2407 | INIT_LIST_HEAD(&sop->so_stateids); |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 2408 | sop->so_client = clp; |
| 2409 | init_nfs4_replay(&sop->so_replay); |
| 2410 | return sop; |
| 2411 | } |
| 2412 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2413 | 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] | 2414 | { |
Stanislav Kinsbursky | 9b53113 | 2012-11-14 18:21:41 +0300 | [diff] [blame] | 2415 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
| 2416 | |
| 2417 | list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2418 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2419 | } |
| 2420 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2421 | static struct nfs4_openowner * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2423 | struct nfs4_openowner *oo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2424 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2425 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
| 2426 | if (!oo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2427 | return NULL; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2428 | oo->oo_owner.so_is_open_owner = 1; |
| 2429 | oo->oo_owner.so_seqid = open->op_seqid; |
J. Bruce Fields | d29b20c | 2011-10-13 15:12:59 -0400 | [diff] [blame] | 2430 | oo->oo_flags = NFS4_OO_NEW; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2431 | oo->oo_time = 0; |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 2432 | oo->oo_last_closed_stid = NULL; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2433 | INIT_LIST_HEAD(&oo->oo_close_lru); |
| 2434 | hash_openowner(oo, clp, strhashval); |
| 2435 | return oo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2436 | } |
| 2437 | |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 2438 | static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2439 | struct nfs4_openowner *oo = open->op_openowner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2440 | |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 2441 | stp->st_stid.sc_type = NFS4_OPEN_STID; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2442 | INIT_LIST_HEAD(&stp->st_lockowners); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2443 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 2444 | list_add(&stp->st_perfile, &fp->fi_stateids); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2445 | stp->st_stateowner = &oo->oo_owner; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2446 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2447 | stp->st_file = fp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | stp->st_access_bmap = 0; |
| 2449 | stp->st_deny_bmap = 0; |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 2450 | set_access(open->op_share_access, stp); |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 2451 | set_deny(open->op_share_deny, stp); |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2452 | stp->st_openstp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2453 | } |
| 2454 | |
| 2455 | static void |
Stanislav Kinsbursky | 73758fed | 2012-11-14 18:22:01 +0300 | [diff] [blame] | 2456 | move_to_close_lru(struct nfs4_openowner *oo, struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2457 | { |
Stanislav Kinsbursky | 73758fed | 2012-11-14 18:22:01 +0300 | [diff] [blame] | 2458 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
| 2459 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2460 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2461 | |
Stanislav Kinsbursky | 73758fed | 2012-11-14 18:22:01 +0300 | [diff] [blame] | 2462 | list_move_tail(&oo->oo_close_lru, &nn->close_lru); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2463 | oo->oo_time = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2464 | } |
| 2465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2466 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2467 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
| 2468 | clientid_t *clid) |
| 2469 | { |
| 2470 | return (sop->so_owner.len == owner->len) && |
| 2471 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && |
| 2472 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2473 | } |
| 2474 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2475 | static struct nfs4_openowner * |
Stanislav Kinsbursky | 9b53113 | 2012-11-14 18:21:41 +0300 | [diff] [blame] | 2476 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, |
| 2477 | bool sessions, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2478 | { |
J. Bruce Fields | a50d2ad | 2011-10-12 16:24:27 -0400 | [diff] [blame] | 2479 | struct nfs4_stateowner *so; |
| 2480 | struct nfs4_openowner *oo; |
J. Bruce Fields | d15c077 | 2012-09-13 16:19:31 -0400 | [diff] [blame] | 2481 | struct nfs4_client *clp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2482 | |
Stanislav Kinsbursky | 9b53113 | 2012-11-14 18:21:41 +0300 | [diff] [blame] | 2483 | list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 2484 | if (!so->so_is_open_owner) |
| 2485 | continue; |
J. Bruce Fields | a50d2ad | 2011-10-12 16:24:27 -0400 | [diff] [blame] | 2486 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
| 2487 | oo = openowner(so); |
J. Bruce Fields | d15c077 | 2012-09-13 16:19:31 -0400 | [diff] [blame] | 2488 | clp = oo->oo_owner.so_client; |
| 2489 | if ((bool)clp->cl_minorversion != sessions) |
| 2490 | return NULL; |
J. Bruce Fields | a50d2ad | 2011-10-12 16:24:27 -0400 | [diff] [blame] | 2491 | renew_client(oo->oo_owner.so_client); |
| 2492 | return oo; |
| 2493 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2494 | } |
| 2495 | return NULL; |
| 2496 | } |
| 2497 | |
| 2498 | /* search file_hashtbl[] for file */ |
| 2499 | static struct nfs4_file * |
| 2500 | find_file(struct inode *ino) |
| 2501 | { |
| 2502 | unsigned int hashval = file_hashval(ino); |
| 2503 | struct nfs4_file *fp; |
| 2504 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 2505 | spin_lock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2506 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2507 | if (fp->fi_inode == ino) { |
| 2508 | get_nfs4_file(fp); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 2509 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2510 | return fp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2511 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2512 | } |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 2513 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2514 | return NULL; |
| 2515 | } |
| 2516 | |
J. Bruce Fields | 4f83aa3 | 2008-07-07 15:02:02 -0400 | [diff] [blame] | 2517 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2518 | * Called to check deny when READ with all zero stateid or |
| 2519 | * WRITE with all zero or all one stateid |
| 2520 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2521 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2522 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
| 2523 | { |
| 2524 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 2525 | struct nfs4_file *fp; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 2526 | struct nfs4_ol_stateid *stp; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2527 | __be32 ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2528 | |
| 2529 | dprintk("NFSD: nfs4_share_conflict\n"); |
| 2530 | |
| 2531 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2532 | if (!fp) |
| 2533 | return nfs_ok; |
NeilBrown | b700949 | 2005-07-07 17:59:23 -0700 | [diff] [blame] | 2534 | ret = nfserr_locked; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2535 | /* Search for conflicting share reservations */ |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2536 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 2537 | if (test_deny(deny_type, stp) || |
| 2538 | test_deny(NFS4_SHARE_DENY_BOTH, stp)) |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2539 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2541 | ret = nfs_ok; |
| 2542 | out: |
| 2543 | put_nfs4_file(fp); |
| 2544 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | } |
| 2546 | |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 2547 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2548 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2549 | /* We're assuming the state code never drops its reference |
| 2550 | * without first removing the lease. Since we're in this lease |
| 2551 | * callback (and since the lease code is serialized by the kernel |
| 2552 | * lock) we know the server hasn't removed the lease yet, we know |
| 2553 | * it's safe to take a reference: */ |
| 2554 | atomic_inc(&dp->dl_count); |
| 2555 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2556 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2557 | |
Arnd Bergmann | 460781b | 2010-11-17 16:26:56 +0100 | [diff] [blame] | 2558 | /* only place dl_time is set. protected by lock_flocks*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2559 | dp->dl_time = get_seconds(); |
| 2560 | |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 2561 | nfsd4_cb_recall(dp); |
| 2562 | } |
| 2563 | |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2564 | /* Called from break_lease() with lock_flocks() held. */ |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 2565 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
| 2566 | { |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2567 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
| 2568 | struct nfs4_delegation *dp; |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 2569 | |
J. Bruce Fields | 7fa10cd | 2012-10-16 12:39:33 -0400 | [diff] [blame] | 2570 | if (!fp) { |
| 2571 | WARN(1, "(%p)->fl_owner NULL\n", fl); |
| 2572 | return; |
| 2573 | } |
| 2574 | if (fp->fi_had_conflict) { |
| 2575 | WARN(1, "duplicate break on %p\n", fp); |
| 2576 | return; |
| 2577 | } |
J. Bruce Fields | 0272e1f | 2007-09-12 18:56:12 -0400 | [diff] [blame] | 2578 | /* |
| 2579 | * 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] | 2580 | * we'll remove it ourself if a delegation isn't returned |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 2581 | * in time: |
J. Bruce Fields | 0272e1f | 2007-09-12 18:56:12 -0400 | [diff] [blame] | 2582 | */ |
| 2583 | fl->fl_break_time = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2584 | |
J. Bruce Fields | 5d926e8 | 2011-02-07 16:53:46 -0500 | [diff] [blame] | 2585 | spin_lock(&recall_lock); |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2586 | fp->fi_had_conflict = true; |
| 2587 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) |
| 2588 | nfsd_break_one_deleg(dp); |
J. Bruce Fields | 5d926e8 | 2011-02-07 16:53:46 -0500 | [diff] [blame] | 2589 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2590 | } |
| 2591 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2592 | static |
| 2593 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) |
| 2594 | { |
| 2595 | if (arg & F_UNLCK) |
| 2596 | return lease_modify(onlist, arg); |
| 2597 | else |
| 2598 | return -EAGAIN; |
| 2599 | } |
| 2600 | |
Alexey Dobriyan | 7b02196 | 2009-09-21 17:01:12 -0700 | [diff] [blame] | 2601 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
J. Bruce Fields | 8fb47a4 | 2011-07-20 20:21:59 -0400 | [diff] [blame] | 2602 | .lm_break = nfsd_break_deleg_cb, |
| 2603 | .lm_change = nfsd_change_deleg_cb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2604 | }; |
| 2605 | |
J. Bruce Fields | 7a8711c | 2011-09-02 09:03:37 -0400 | [diff] [blame] | 2606 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
| 2607 | { |
| 2608 | if (nfsd4_has_session(cstate)) |
| 2609 | return nfs_ok; |
| 2610 | if (seqid == so->so_seqid - 1) |
| 2611 | return nfserr_replay_me; |
| 2612 | if (seqid == so->so_seqid) |
| 2613 | return nfs_ok; |
| 2614 | return nfserr_bad_seqid; |
| 2615 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2616 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2617 | __be32 |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2618 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 2619 | struct nfsd4_open *open, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2621 | clientid_t *clientid = &open->op_clientid; |
| 2622 | struct nfs4_client *clp = NULL; |
| 2623 | unsigned int strhashval; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2624 | struct nfs4_openowner *oo = NULL; |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 2625 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2626 | |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 2627 | if (STALE_CLIENTID(&open->op_clientid, nn)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2628 | return nfserr_stale_clientid; |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 2629 | /* |
| 2630 | * In case we need it later, after we've already created the |
| 2631 | * file and don't want to risk a further failure: |
| 2632 | */ |
| 2633 | open->op_file = nfsd4_alloc_file(); |
| 2634 | if (open->op_file == NULL) |
| 2635 | return nfserr_jukebox; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2636 | |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 2637 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
Stanislav Kinsbursky | 9b53113 | 2012-11-14 18:21:41 +0300 | [diff] [blame] | 2638 | oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2639 | open->op_openowner = oo; |
| 2640 | if (!oo) { |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 2641 | clp = find_confirmed_client(clientid, cstate->minorversion, |
| 2642 | nn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2643 | if (clp == NULL) |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2644 | return nfserr_expired; |
J. Bruce Fields | bcf130f | 2011-10-12 20:44:20 -0400 | [diff] [blame] | 2645 | goto new_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2646 | } |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 2647 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2648 | /* Replace unconfirmed owners without checking for replay. */ |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2649 | clp = oo->oo_owner.so_client; |
| 2650 | release_openowner(oo); |
| 2651 | open->op_openowner = NULL; |
J. Bruce Fields | bcf130f | 2011-10-12 20:44:20 -0400 | [diff] [blame] | 2652 | goto new_owner; |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2653 | } |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 2654 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
| 2655 | if (status) |
| 2656 | return status; |
| 2657 | clp = oo->oo_owner.so_client; |
| 2658 | goto alloc_stateid; |
J. Bruce Fields | bcf130f | 2011-10-12 20:44:20 -0400 | [diff] [blame] | 2659 | new_owner: |
| 2660 | oo = alloc_init_open_stateowner(strhashval, clp, open); |
| 2661 | if (oo == NULL) |
| 2662 | return nfserr_jukebox; |
| 2663 | open->op_openowner = oo; |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 2664 | alloc_stateid: |
| 2665 | open->op_stp = nfs4_alloc_stateid(clp); |
| 2666 | if (!open->op_stp) |
| 2667 | return nfserr_jukebox; |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2668 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2669 | } |
| 2670 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2671 | static inline __be32 |
NeilBrown | 4a6e43e | 2005-06-23 22:02:50 -0700 | [diff] [blame] | 2672 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
| 2673 | { |
| 2674 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) |
| 2675 | return nfserr_openmode; |
| 2676 | else |
| 2677 | return nfs_ok; |
| 2678 | } |
| 2679 | |
Daniel Mack | c47d832 | 2011-05-16 16:38:14 +0200 | [diff] [blame] | 2680 | static int share_access_to_flags(u32 share_access) |
J. Bruce Fields | 24a0111 | 2010-05-18 20:01:35 -0400 | [diff] [blame] | 2681 | { |
J. Bruce Fields | 24a0111 | 2010-05-18 20:01:35 -0400 | [diff] [blame] | 2682 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
| 2683 | } |
| 2684 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 2685 | 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] | 2686 | { |
| 2687 | struct nfs4_stid *ret; |
| 2688 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 2689 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
J. Bruce Fields | f459e45 | 2011-09-09 09:06:12 -0400 | [diff] [blame] | 2690 | if (!ret) |
| 2691 | return NULL; |
| 2692 | return delegstateid(ret); |
| 2693 | } |
| 2694 | |
J. Bruce Fields | 8b289b2 | 2011-10-19 11:52:12 -0400 | [diff] [blame] | 2695 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
| 2696 | { |
| 2697 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || |
| 2698 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; |
| 2699 | } |
| 2700 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2701 | static __be32 |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 2702 | nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2703 | struct nfs4_delegation **dp) |
| 2704 | { |
| 2705 | int flags; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2706 | __be32 status = nfserr_bad_stateid; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2707 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 2708 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2709 | if (*dp == NULL) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2710 | goto out; |
J. Bruce Fields | 24a0111 | 2010-05-18 20:01:35 -0400 | [diff] [blame] | 2711 | flags = share_access_to_flags(open->op_share_access); |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2712 | status = nfs4_check_delegmode(*dp, flags); |
| 2713 | if (status) |
| 2714 | *dp = NULL; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2715 | out: |
J. Bruce Fields | 8b289b2 | 2011-10-19 11:52:12 -0400 | [diff] [blame] | 2716 | if (!nfsd4_is_deleg_cur(open)) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2717 | return nfs_ok; |
| 2718 | if (status) |
| 2719 | return status; |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 2720 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2721 | return nfs_ok; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2722 | } |
| 2723 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2724 | static __be32 |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 2725 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2726 | { |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 2727 | struct nfs4_ol_stateid *local; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2728 | struct nfs4_openowner *oo = open->op_openowner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2729 | |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 2730 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2731 | /* ignore lock owners */ |
| 2732 | if (local->st_stateowner->so_is_open_owner == 0) |
| 2733 | continue; |
| 2734 | /* remember if we have seen this open owner */ |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2735 | if (local->st_stateowner == &oo->oo_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2736 | *stpp = local; |
| 2737 | /* check for conflicting share reservations */ |
| 2738 | if (!test_share(local, open)) |
J. Bruce Fields | 77eaae8 | 2011-09-02 12:08:20 -0400 | [diff] [blame] | 2739 | return nfserr_share_denied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2740 | } |
J. Bruce Fields | 77eaae8 | 2011-09-02 12:08:20 -0400 | [diff] [blame] | 2741 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2742 | } |
| 2743 | |
J. Bruce Fields | 21fb401 | 2010-07-28 12:21:23 -0400 | [diff] [blame] | 2744 | static inline int nfs4_access_to_access(u32 nfs4_access) |
| 2745 | { |
| 2746 | int flags = 0; |
| 2747 | |
| 2748 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) |
| 2749 | flags |= NFSD_MAY_READ; |
| 2750 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) |
| 2751 | flags |= NFSD_MAY_WRITE; |
| 2752 | return flags; |
| 2753 | } |
| 2754 | |
Casey Bodley | 0c12eaf | 2011-07-23 14:58:10 -0400 | [diff] [blame] | 2755 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
| 2756 | struct svc_fh *cur_fh, struct nfsd4_open *open) |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2757 | { |
| 2758 | __be32 status; |
Casey Bodley | 0c12eaf | 2011-07-23 14:58:10 -0400 | [diff] [blame] | 2759 | int oflag = nfs4_access_to_omode(open->op_share_access); |
| 2760 | int access = nfs4_access_to_access(open->op_share_access); |
| 2761 | |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2762 | if (!fp->fi_fds[oflag]) { |
| 2763 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, |
| 2764 | &fp->fi_fds[oflag]); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2765 | if (status) |
| 2766 | return status; |
| 2767 | } |
| 2768 | nfs4_file_get_access(fp, oflag); |
| 2769 | |
| 2770 | return nfs_ok; |
| 2771 | } |
| 2772 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2773 | static inline __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2774 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
| 2775 | struct nfsd4_open *open) |
| 2776 | { |
| 2777 | struct iattr iattr = { |
| 2778 | .ia_valid = ATTR_SIZE, |
| 2779 | .ia_size = 0, |
| 2780 | }; |
| 2781 | if (!open->op_truncate) |
| 2782 | return 0; |
| 2783 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) |
Al Viro | 9246585 | 2006-01-18 17:43:46 -0800 | [diff] [blame] | 2784 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2785 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
| 2786 | } |
| 2787 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2788 | static __be32 |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 2789 | 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] | 2790 | { |
J. Bruce Fields | b6d2f1c | 2011-10-10 17:44:19 -0400 | [diff] [blame] | 2791 | u32 op_share_access = open->op_share_access; |
J. Bruce Fields | 7d94784 | 2010-08-20 18:09:31 -0400 | [diff] [blame] | 2792 | bool new_access; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2793 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2794 | |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 2795 | new_access = !test_access(op_share_access, stp); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2796 | if (new_access) { |
Casey Bodley | 0c12eaf | 2011-07-23 14:58:10 -0400 | [diff] [blame] | 2797 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2798 | if (status) |
| 2799 | return status; |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2800 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2801 | status = nfsd4_truncate(rqstp, cur_fh, open); |
| 2802 | if (status) { |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2803 | if (new_access) { |
J. Bruce Fields | f197c27 | 2011-06-29 08:23:50 -0400 | [diff] [blame] | 2804 | int oflag = nfs4_access_to_omode(op_share_access); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2805 | nfs4_file_put_access(fp, oflag); |
| 2806 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2807 | return status; |
| 2808 | } |
| 2809 | /* remember the open */ |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 2810 | set_access(op_share_access, stp); |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 2811 | set_deny(open->op_share_deny, stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2812 | |
| 2813 | return nfs_ok; |
| 2814 | } |
| 2815 | |
| 2816 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2817 | static void |
J. Bruce Fields | 1255a8f | 2012-03-06 14:35:16 -0500 | [diff] [blame] | 2818 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2819 | { |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 2820 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2821 | } |
| 2822 | |
J. Bruce Fields | 14a24e9 | 2010-12-10 19:02:49 -0500 | [diff] [blame] | 2823 | /* Should we give out recallable state?: */ |
| 2824 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) |
| 2825 | { |
| 2826 | if (clp->cl_cb_state == NFSD4_CB_UP) |
| 2827 | return true; |
| 2828 | /* |
| 2829 | * In the sessions case, since we don't have to establish a |
| 2830 | * separate connection for callbacks, we assume it's OK |
| 2831 | * until we hear otherwise: |
| 2832 | */ |
| 2833 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; |
| 2834 | } |
| 2835 | |
J. Bruce Fields | 22d38c4 | 2011-01-31 11:55:12 -0500 | [diff] [blame] | 2836 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
| 2837 | { |
| 2838 | struct file_lock *fl; |
| 2839 | |
| 2840 | fl = locks_alloc_lock(); |
| 2841 | if (!fl) |
| 2842 | return NULL; |
| 2843 | locks_init_lock(fl); |
| 2844 | fl->fl_lmops = &nfsd_lease_mng_ops; |
| 2845 | fl->fl_flags = FL_LEASE; |
| 2846 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
| 2847 | fl->fl_end = OFFSET_MAX; |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2848 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
J. Bruce Fields | 22d38c4 | 2011-01-31 11:55:12 -0500 | [diff] [blame] | 2849 | fl->fl_pid = current->tgid; |
J. Bruce Fields | 22d38c4 | 2011-01-31 11:55:12 -0500 | [diff] [blame] | 2850 | return fl; |
| 2851 | } |
| 2852 | |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 2853 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
| 2854 | { |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2855 | struct nfs4_file *fp = dp->dl_file; |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 2856 | struct file_lock *fl; |
| 2857 | int status; |
| 2858 | |
| 2859 | fl = nfs4_alloc_init_lease(dp, flag); |
| 2860 | if (!fl) |
| 2861 | return -ENOMEM; |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2862 | fl->fl_file = find_readable_file(fp); |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 2863 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2864 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 2865 | if (status) { |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2866 | list_del_init(&dp->dl_perclnt); |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 2867 | locks_free_lock(fl); |
| 2868 | return -ENOMEM; |
| 2869 | } |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2870 | fp->fi_lease = fl; |
Al Viro | cb0942b | 2012-08-27 14:48:26 -0400 | [diff] [blame] | 2871 | fp->fi_deleg_file = get_file(fl->fl_file); |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2872 | atomic_set(&fp->fi_delegees, 1); |
| 2873 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
| 2874 | return 0; |
| 2875 | } |
| 2876 | |
| 2877 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) |
| 2878 | { |
| 2879 | struct nfs4_file *fp = dp->dl_file; |
| 2880 | |
| 2881 | if (!fp->fi_lease) |
| 2882 | return nfs4_setlease(dp, flag); |
| 2883 | spin_lock(&recall_lock); |
| 2884 | if (fp->fi_had_conflict) { |
| 2885 | spin_unlock(&recall_lock); |
| 2886 | return -EAGAIN; |
| 2887 | } |
| 2888 | atomic_inc(&fp->fi_delegees); |
| 2889 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
| 2890 | spin_unlock(&recall_lock); |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 2891 | list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 2892 | return 0; |
| 2893 | } |
| 2894 | |
Benny Halevy | 4aa8913 | 2012-02-21 14:16:44 -0800 | [diff] [blame] | 2895 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
| 2896 | { |
| 2897 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; |
| 2898 | if (status == -EAGAIN) |
| 2899 | open->op_why_no_deleg = WND4_CONTENTION; |
| 2900 | else { |
| 2901 | open->op_why_no_deleg = WND4_RESOURCE; |
| 2902 | switch (open->op_deleg_want) { |
| 2903 | case NFS4_SHARE_WANT_READ_DELEG: |
| 2904 | case NFS4_SHARE_WANT_WRITE_DELEG: |
| 2905 | case NFS4_SHARE_WANT_ANY_DELEG: |
| 2906 | break; |
| 2907 | case NFS4_SHARE_WANT_CANCEL: |
| 2908 | open->op_why_no_deleg = WND4_CANCELLED; |
| 2909 | break; |
| 2910 | case NFS4_SHARE_WANT_NO_DELEG: |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 2911 | WARN_ON_ONCE(1); |
Benny Halevy | 4aa8913 | 2012-02-21 14:16:44 -0800 | [diff] [blame] | 2912 | } |
| 2913 | } |
| 2914 | } |
| 2915 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2916 | /* |
| 2917 | * Attempt to hand out a delegation. |
| 2918 | */ |
| 2919 | static void |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 2920 | nfs4_open_delegation(struct net *net, struct svc_fh *fh, |
| 2921 | struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2922 | { |
| 2923 | struct nfs4_delegation *dp; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2924 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
J. Bruce Fields | 14a24e9 | 2010-12-10 19:02:49 -0500 | [diff] [blame] | 2925 | int cb_up; |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 2926 | int status = 0, flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2927 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2928 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2929 | flag = NFS4_OPEN_DELEGATE_NONE; |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2930 | open->op_recall = 0; |
| 2931 | switch (open->op_claim_type) { |
| 2932 | case NFS4_OPEN_CLAIM_PREVIOUS: |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 2933 | if (!cb_up) |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2934 | open->op_recall = 1; |
| 2935 | flag = open->op_delegate_type; |
| 2936 | if (flag == NFS4_OPEN_DELEGATE_NONE) |
| 2937 | goto out; |
| 2938 | break; |
| 2939 | case NFS4_OPEN_CLAIM_NULL: |
| 2940 | /* Let's not give out any delegations till everyone's |
| 2941 | * had the chance to reclaim theirs.... */ |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 2942 | if (locks_in_grace(net)) |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2943 | goto out; |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 2944 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2945 | goto out; |
| 2946 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
| 2947 | flag = NFS4_OPEN_DELEGATE_WRITE; |
| 2948 | else |
| 2949 | flag = NFS4_OPEN_DELEGATE_READ; |
| 2950 | break; |
| 2951 | default: |
| 2952 | goto out; |
| 2953 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2954 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2955 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
J. Bruce Fields | dd239cc | 2011-01-31 17:14:55 -0500 | [diff] [blame] | 2956 | if (dp == NULL) |
| 2957 | goto out_no_deleg; |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2958 | status = nfs4_set_delegation(dp, flag); |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 2959 | if (status) |
J. Bruce Fields | dd239cc | 2011-01-31 17:14:55 -0500 | [diff] [blame] | 2960 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2961 | |
J. Bruce Fields | d5477a8 | 2011-09-08 12:07:44 -0400 | [diff] [blame] | 2962 | 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] | 2963 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2964 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
J. Bruce Fields | d5477a8 | 2011-09-08 12:07:44 -0400 | [diff] [blame] | 2965 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2966 | out: |
| 2967 | open->op_delegate_type = flag; |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 2968 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
| 2969 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && |
| 2970 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) |
| 2971 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
| 2972 | |
Benny Halevy | 4aa8913 | 2012-02-21 14:16:44 -0800 | [diff] [blame] | 2973 | /* 4.1 client asking for a delegation? */ |
| 2974 | if (open->op_deleg_want) |
| 2975 | nfsd4_open_deleg_none_ext(open, status); |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 2976 | } |
J. Bruce Fields | dd239cc | 2011-01-31 17:14:55 -0500 | [diff] [blame] | 2977 | return; |
| 2978 | out_free: |
J. Bruce Fields | 24ffb93 | 2012-12-12 15:24:12 -0500 | [diff] [blame] | 2979 | unhash_stid(&dp->dl_stid); |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2980 | nfs4_put_delegation(dp); |
J. Bruce Fields | dd239cc | 2011-01-31 17:14:55 -0500 | [diff] [blame] | 2981 | out_no_deleg: |
| 2982 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 2983 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2984 | } |
| 2985 | |
Benny Halevy | e27f49c | 2012-02-21 14:16:54 -0800 | [diff] [blame] | 2986 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
| 2987 | struct nfs4_delegation *dp) |
| 2988 | { |
| 2989 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && |
| 2990 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { |
| 2991 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; |
| 2992 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; |
| 2993 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && |
| 2994 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { |
| 2995 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; |
| 2996 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; |
| 2997 | } |
| 2998 | /* Otherwise the client must be confused wanting a delegation |
| 2999 | * it already has, therefore we don't return |
| 3000 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. |
| 3001 | */ |
| 3002 | } |
| 3003 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3004 | /* |
| 3005 | * called with nfs4_lock_state() held. |
| 3006 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3007 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3008 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
| 3009 | { |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3010 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3011 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3012 | struct nfs4_file *fp = NULL; |
| 3013 | struct inode *ino = current_fh->fh_dentry->d_inode; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3014 | struct nfs4_ol_stateid *stp = NULL; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 3015 | struct nfs4_delegation *dp = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3016 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3017 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3018 | /* |
| 3019 | * Lookup file; if found, lookup stateid and check open request, |
| 3020 | * and check for delegations in the process of being recalled. |
| 3021 | * If not found, create the nfs4_file struct |
| 3022 | */ |
| 3023 | fp = find_file(ino); |
| 3024 | if (fp) { |
| 3025 | if ((status = nfs4_check_open(fp, open, &stp))) |
| 3026 | goto out; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3027 | status = nfs4_check_deleg(cl, fp, open, &dp); |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 3028 | if (status) |
| 3029 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3030 | } else { |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 3031 | status = nfserr_bad_stateid; |
J. Bruce Fields | 8b289b2 | 2011-10-19 11:52:12 -0400 | [diff] [blame] | 3032 | if (nfsd4_is_deleg_cur(open)) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 3033 | goto out; |
J. Bruce Fields | 3e77246 | 2011-08-10 19:07:33 -0400 | [diff] [blame] | 3034 | status = nfserr_jukebox; |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 3035 | fp = open->op_file; |
| 3036 | open->op_file = NULL; |
| 3037 | nfsd4_init_file(fp, ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3038 | } |
| 3039 | |
| 3040 | /* |
| 3041 | * OPEN the file, or upgrade an existing OPEN. |
| 3042 | * If truncate fails, the OPEN fails. |
| 3043 | */ |
| 3044 | if (stp) { |
| 3045 | /* Stateid was found, this is an OPEN upgrade */ |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 3046 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3047 | if (status) |
| 3048 | goto out; |
| 3049 | } else { |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 3050 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 3051 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3052 | goto out; |
J. Bruce Fields | 4af8250 | 2012-06-07 17:30:45 -0400 | [diff] [blame] | 3053 | status = nfsd4_truncate(rqstp, current_fh, open); |
| 3054 | if (status) |
| 3055 | goto out; |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 3056 | stp = open->op_stp; |
| 3057 | open->op_stp = NULL; |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 3058 | init_open_stateid(stp, fp, open); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3059 | } |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3060 | update_stateid(&stp->st_stid.sc_stateid); |
| 3061 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3062 | |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 3063 | if (nfsd4_has_session(&resp->cstate)) { |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3064 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3065 | |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 3066 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
| 3067 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; |
| 3068 | open->op_why_no_deleg = WND4_NOT_WANTED; |
| 3069 | goto nodeleg; |
| 3070 | } |
| 3071 | } |
| 3072 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3073 | /* |
| 3074 | * Attempt to hand out a delegation. No error return, because the |
| 3075 | * OPEN succeeds even if we fail. |
| 3076 | */ |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 3077 | nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 3078 | nodeleg: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3079 | status = nfs_ok; |
| 3080 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 3081 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3082 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3083 | out: |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 3084 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
| 3085 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && |
Benny Halevy | e27f49c | 2012-02-21 14:16:54 -0800 | [diff] [blame] | 3086 | open->op_deleg_want) |
| 3087 | nfsd4_deleg_xgrade_none_ext(open, dp); |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 3088 | |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 3089 | if (fp) |
| 3090 | put_nfs4_file(fp); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 3091 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
J. Bruce Fields | 1255a8f | 2012-03-06 14:35:16 -0500 | [diff] [blame] | 3092 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3093 | /* |
| 3094 | * To finish the open response, we just need to set the rflags. |
| 3095 | */ |
| 3096 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3097 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3098 | !nfsd4_has_session(&resp->cstate)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3099 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
| 3100 | |
| 3101 | return status; |
| 3102 | } |
| 3103 | |
J. Bruce Fields | d29b20c | 2011-10-13 15:12:59 -0400 | [diff] [blame] | 3104 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
| 3105 | { |
| 3106 | if (open->op_openowner) { |
| 3107 | struct nfs4_openowner *oo = open->op_openowner; |
| 3108 | |
| 3109 | if (!list_empty(&oo->oo_owner.so_stateids)) |
| 3110 | list_del_init(&oo->oo_close_lru); |
| 3111 | if (oo->oo_flags & NFS4_OO_NEW) { |
| 3112 | if (status) { |
| 3113 | release_openowner(oo); |
| 3114 | open->op_openowner = NULL; |
| 3115 | } else |
| 3116 | oo->oo_flags &= ~NFS4_OO_NEW; |
| 3117 | } |
| 3118 | } |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 3119 | if (open->op_file) |
| 3120 | nfsd4_free_file(open->op_file); |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 3121 | if (open->op_stp) |
J. Bruce Fields | ef79859 | 2012-08-29 10:32:54 -0700 | [diff] [blame] | 3122 | free_generic_stateid(open->op_stp); |
J. Bruce Fields | d29b20c | 2011-10-13 15:12:59 -0400 | [diff] [blame] | 3123 | } |
| 3124 | |
J. Bruce Fields | 9b2ef62 | 2012-12-03 17:24:41 -0500 | [diff] [blame] | 3125 | static __be32 lookup_clientid(clientid_t *clid, bool session, struct nfsd_net *nn, struct nfs4_client **clp) |
| 3126 | { |
| 3127 | struct nfs4_client *found; |
| 3128 | |
| 3129 | if (STALE_CLIENTID(clid, nn)) |
| 3130 | return nfserr_stale_clientid; |
| 3131 | found = find_confirmed_client(clid, session, nn); |
| 3132 | if (clp) |
| 3133 | *clp = found; |
| 3134 | return found ? nfs_ok : nfserr_expired; |
| 3135 | } |
| 3136 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3137 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 3138 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 3139 | clientid_t *clid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3140 | { |
| 3141 | struct nfs4_client *clp; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3142 | __be32 status; |
Stanislav Kinsbursky | 7f2210f | 2012-11-14 18:21:05 +0300 | [diff] [blame] | 3143 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3144 | |
| 3145 | nfs4_lock_state(); |
| 3146 | dprintk("process_renew(%08x/%08x): starting\n", |
| 3147 | clid->cl_boot, clid->cl_id); |
J. Bruce Fields | 9b2ef62 | 2012-12-03 17:24:41 -0500 | [diff] [blame] | 3148 | status = lookup_clientid(clid, cstate->minorversion, nn, &clp); |
| 3149 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3150 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3151 | status = nfserr_cb_path_down; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 3152 | if (!list_empty(&clp->cl_delegations) |
J. Bruce Fields | 77a3569 | 2010-04-30 18:51:44 -0400 | [diff] [blame] | 3153 | && clp->cl_cb_state != NFSD4_CB_UP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3154 | goto out; |
| 3155 | status = nfs_ok; |
| 3156 | out: |
| 3157 | nfs4_unlock_state(); |
| 3158 | return status; |
| 3159 | } |
| 3160 | |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 3161 | static void |
Stanislav Kinsbursky | 12760c6 | 2012-11-14 18:22:12 +0300 | [diff] [blame] | 3162 | nfsd4_end_grace(struct nfsd_net *nn) |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 3163 | { |
Jeff Layton | 33dcc48 | 2012-04-10 11:08:48 -0400 | [diff] [blame] | 3164 | /* do nothing if grace period already ended */ |
Stanislav Kinsbursky | a51c84e | 2012-07-25 16:57:37 +0400 | [diff] [blame] | 3165 | if (nn->grace_ended) |
Jeff Layton | 33dcc48 | 2012-04-10 11:08:48 -0400 | [diff] [blame] | 3166 | return; |
| 3167 | |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 3168 | dprintk("NFSD: end of grace period\n"); |
Stanislav Kinsbursky | a51c84e | 2012-07-25 16:57:37 +0400 | [diff] [blame] | 3169 | nn->grace_ended = true; |
Stanislav Kinsbursky | 12760c6 | 2012-11-14 18:22:12 +0300 | [diff] [blame] | 3170 | nfsd4_record_grace_done(nn, nn->boot_time); |
Stanislav Kinsbursky | 5e1533c | 2012-07-25 16:56:58 +0400 | [diff] [blame] | 3171 | locks_end_grace(&nn->nfsd4_manager); |
J. Bruce Fields | e46b498 | 2010-03-01 19:21:21 -0500 | [diff] [blame] | 3172 | /* |
| 3173 | * Now that every NFSv4 client has had the chance to recover and |
| 3174 | * to see the (possibly new, possibly shorter) lease time, we |
| 3175 | * can safely set the next grace time to the current lease time: |
| 3176 | */ |
Stanislav Kinsbursky | 5284b44 | 2012-11-27 14:11:49 +0300 | [diff] [blame] | 3177 | nn->nfsd4_grace = nn->nfsd4_lease; |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 3178 | } |
| 3179 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 3180 | static time_t |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 3181 | nfs4_laundromat(struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3182 | { |
| 3183 | struct nfs4_client *clp; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3184 | struct nfs4_openowner *oo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3185 | struct nfs4_delegation *dp; |
| 3186 | struct list_head *pos, *next, reaplist; |
Stanislav Kinsbursky | 3d73371 | 2012-11-27 14:11:44 +0300 | [diff] [blame] | 3187 | time_t cutoff = get_seconds() - nn->nfsd4_lease; |
| 3188 | time_t t, clientid_val = nn->nfsd4_lease; |
| 3189 | time_t u, test_val = nn->nfsd4_lease; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3190 | |
| 3191 | nfs4_lock_state(); |
| 3192 | |
| 3193 | dprintk("NFSD: laundromat service - starting\n"); |
Stanislav Kinsbursky | 12760c6 | 2012-11-14 18:22:12 +0300 | [diff] [blame] | 3194 | nfsd4_end_grace(nn); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 3195 | INIT_LIST_HEAD(&reaplist); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 3196 | spin_lock(&nn->client_lock); |
Stanislav Kinsbursky | 5ed58bb | 2012-11-14 18:21:56 +0300 | [diff] [blame] | 3197 | list_for_each_safe(pos, next, &nn->client_lru) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3198 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
| 3199 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { |
| 3200 | t = clp->cl_time - cutoff; |
| 3201 | if (clientid_val > t) |
| 3202 | clientid_val = t; |
| 3203 | break; |
| 3204 | } |
Benny Halevy | d768298 | 2010-05-12 00:13:54 +0300 | [diff] [blame] | 3205 | if (atomic_read(&clp->cl_refcount)) { |
| 3206 | dprintk("NFSD: client in use (clientid %08x)\n", |
| 3207 | clp->cl_clientid.cl_id); |
| 3208 | continue; |
| 3209 | } |
| 3210 | unhash_client_locked(clp); |
| 3211 | list_add(&clp->cl_lru, &reaplist); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 3212 | } |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 3213 | spin_unlock(&nn->client_lock); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 3214 | list_for_each_safe(pos, next, &reaplist) { |
| 3215 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3216 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
| 3217 | clp->cl_clientid.cl_id); |
| 3218 | expire_client(clp); |
| 3219 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3220 | spin_lock(&recall_lock); |
| 3221 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 3222 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
Stanislav Kinsbursky | 4e37a7c2 | 2012-11-26 15:22:03 +0300 | [diff] [blame] | 3223 | if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) |
| 3224 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3225 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
| 3226 | u = dp->dl_time - cutoff; |
| 3227 | if (test_val > u) |
| 3228 | test_val = u; |
| 3229 | break; |
| 3230 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3231 | list_move(&dp->dl_recall_lru, &reaplist); |
| 3232 | } |
| 3233 | spin_unlock(&recall_lock); |
| 3234 | list_for_each_safe(pos, next, &reaplist) { |
| 3235 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3236 | unhash_delegation(dp); |
| 3237 | } |
Stanislav Kinsbursky | 3d73371 | 2012-11-27 14:11:44 +0300 | [diff] [blame] | 3238 | test_val = nn->nfsd4_lease; |
Stanislav Kinsbursky | 73758fed | 2012-11-14 18:22:01 +0300 | [diff] [blame] | 3239 | list_for_each_safe(pos, next, &nn->close_lru) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3240 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
| 3241 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { |
| 3242 | u = oo->oo_time - cutoff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3243 | if (test_val > u) |
| 3244 | test_val = u; |
| 3245 | break; |
| 3246 | } |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3247 | release_openowner(oo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3248 | } |
| 3249 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) |
| 3250 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; |
| 3251 | nfs4_unlock_state(); |
| 3252 | return clientid_val; |
| 3253 | } |
| 3254 | |
Harvey Harrison | a254b24 | 2008-02-20 12:49:00 -0800 | [diff] [blame] | 3255 | static struct workqueue_struct *laundry_wq; |
| 3256 | static void laundromat_main(struct work_struct *); |
Harvey Harrison | a254b24 | 2008-02-20 12:49:00 -0800 | [diff] [blame] | 3257 | |
| 3258 | static void |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 3259 | laundromat_main(struct work_struct *laundry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3260 | { |
| 3261 | time_t t; |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 3262 | struct delayed_work *dwork = container_of(laundry, struct delayed_work, |
| 3263 | work); |
| 3264 | struct nfsd_net *nn = container_of(dwork, struct nfsd_net, |
| 3265 | laundromat_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3266 | |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 3267 | t = nfs4_laundromat(nn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3268 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 3269 | queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3270 | } |
| 3271 | |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3272 | static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 3273 | { |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3274 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
| 3275 | return nfserr_bad_stateid; |
| 3276 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3277 | } |
| 3278 | |
| 3279 | static int |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 3280 | STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3281 | { |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 3282 | if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time) |
J. Bruce Fields | e4e83ea | 2010-04-22 16:21:39 -0400 | [diff] [blame] | 3283 | return 0; |
| 3284 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 3285 | STATEID_VAL(stateid)); |
J. Bruce Fields | e4e83ea | 2010-04-22 16:21:39 -0400 | [diff] [blame] | 3286 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3287 | } |
| 3288 | |
| 3289 | static inline int |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 3290 | access_permit_read(struct nfs4_ol_stateid *stp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3291 | { |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 3292 | return test_access(NFS4_SHARE_ACCESS_READ, stp) || |
| 3293 | test_access(NFS4_SHARE_ACCESS_BOTH, stp) || |
| 3294 | test_access(NFS4_SHARE_ACCESS_WRITE, stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3295 | } |
| 3296 | |
| 3297 | static inline int |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 3298 | access_permit_write(struct nfs4_ol_stateid *stp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3299 | { |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 3300 | return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || |
| 3301 | test_access(NFS4_SHARE_ACCESS_BOTH, stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3302 | } |
| 3303 | |
| 3304 | static |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3305 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3306 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3307 | __be32 status = nfserr_openmode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3308 | |
J. Bruce Fields | 0292191 | 2010-07-29 15:16:59 -0400 | [diff] [blame] | 3309 | /* For lock stateid's, we test the parent open, not the lock: */ |
| 3310 | if (stp->st_openstp) |
| 3311 | stp = stp->st_openstp; |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 3312 | if ((flags & WR_STATE) && !access_permit_write(stp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3313 | goto out; |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 3314 | if ((flags & RD_STATE) && !access_permit_read(stp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3315 | goto out; |
| 3316 | status = nfs_ok; |
| 3317 | out: |
| 3318 | return status; |
| 3319 | } |
| 3320 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3321 | static inline __be32 |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 3322 | 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] | 3323 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3324 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3325 | return nfs_ok; |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 3326 | else if (locks_in_grace(net)) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3327 | /* Answer in remaining cases depends on existence of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3328 | * conflicting state; so we must wait out the grace period. */ |
| 3329 | return nfserr_grace; |
| 3330 | } else if (flags & WR_STATE) |
| 3331 | return nfs4_share_conflict(current_fh, |
| 3332 | NFS4_SHARE_DENY_WRITE); |
| 3333 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ |
| 3334 | return nfs4_share_conflict(current_fh, |
| 3335 | NFS4_SHARE_DENY_READ); |
| 3336 | } |
| 3337 | |
| 3338 | /* |
| 3339 | * Allow READ/WRITE during grace period on recovered state only for files |
| 3340 | * that are not able to provide mandatory locking. |
| 3341 | */ |
| 3342 | static inline int |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 3343 | grace_disallows_io(struct net *net, struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3344 | { |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 3345 | return locks_in_grace(net) && mandatory_lock(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3346 | } |
| 3347 | |
J. Bruce Fields | 81b8296 | 2011-08-23 11:03:29 -0400 | [diff] [blame] | 3348 | /* Returns true iff a is later than b: */ |
| 3349 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) |
| 3350 | { |
| 3351 | return (s32)a->si_generation - (s32)b->si_generation > 0; |
| 3352 | } |
| 3353 | |
J. Bruce Fields | 57b7b43 | 2012-04-25 17:58:50 -0400 | [diff] [blame] | 3354 | 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] | 3355 | { |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3356 | /* |
| 3357 | * When sessions are used the stateid generation number is ignored |
| 3358 | * when it is zero. |
| 3359 | */ |
J. Bruce Fields | 28dde24 | 2011-08-22 10:07:12 -0400 | [diff] [blame] | 3360 | if (has_session && in->si_generation == 0) |
J. Bruce Fields | 81b8296 | 2011-08-23 11:03:29 -0400 | [diff] [blame] | 3361 | return nfs_ok; |
| 3362 | |
| 3363 | if (in->si_generation == ref->si_generation) |
| 3364 | return nfs_ok; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3365 | |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 3366 | /* If the client sends us a stateid from the future, it's buggy: */ |
J. Bruce Fields | 81b8296 | 2011-08-23 11:03:29 -0400 | [diff] [blame] | 3367 | if (stateid_generation_after(in, ref)) |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 3368 | return nfserr_bad_stateid; |
| 3369 | /* |
J. Bruce Fields | 81b8296 | 2011-08-23 11:03:29 -0400 | [diff] [blame] | 3370 | * However, we could see a stateid from the past, even from a |
| 3371 | * non-buggy client. For example, if the client sends a lock |
| 3372 | * while some IO is outstanding, the lock may bump si_generation |
| 3373 | * while the IO is still in flight. The client could avoid that |
| 3374 | * situation by waiting for responses on all the IO requests, |
| 3375 | * but better performance may result in retrying IO that |
| 3376 | * receives an old_stateid error if requests are rarely |
| 3377 | * reordered in flight: |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 3378 | */ |
J. Bruce Fields | 81b8296 | 2011-08-23 11:03:29 -0400 | [diff] [blame] | 3379 | return nfserr_old_stateid; |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 3380 | } |
| 3381 | |
Chuck Lever | 7df302f | 2012-05-29 13:56:37 -0400 | [diff] [blame] | 3382 | static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 3383 | { |
J. Bruce Fields | 97b7e3b | 2011-09-09 11:26:58 -0400 | [diff] [blame] | 3384 | struct nfs4_stid *s; |
| 3385 | struct nfs4_ol_stateid *ols; |
| 3386 | __be32 status; |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 3387 | |
Chuck Lever | 7df302f | 2012-05-29 13:56:37 -0400 | [diff] [blame] | 3388 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 3389 | return nfserr_bad_stateid; |
| 3390 | /* Client debugging aid. */ |
| 3391 | if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { |
| 3392 | char addr_str[INET6_ADDRSTRLEN]; |
| 3393 | rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, |
| 3394 | sizeof(addr_str)); |
| 3395 | pr_warn_ratelimited("NFSD: client %s testing state ID " |
| 3396 | "with incorrect client ID\n", addr_str); |
| 3397 | return nfserr_bad_stateid; |
| 3398 | } |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3399 | s = find_stateid(cl, stateid); |
J. Bruce Fields | 97b7e3b | 2011-09-09 11:26:58 -0400 | [diff] [blame] | 3400 | if (!s) |
Chuck Lever | 7df302f | 2012-05-29 13:56:37 -0400 | [diff] [blame] | 3401 | return nfserr_bad_stateid; |
J. Bruce Fields | 36279ac | 2011-09-26 12:53:00 -0400 | [diff] [blame] | 3402 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 3403 | if (status) |
J. Bruce Fields | 97b7e3b | 2011-09-09 11:26:58 -0400 | [diff] [blame] | 3404 | return status; |
| 3405 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) |
| 3406 | return nfs_ok; |
| 3407 | ols = openlockstateid(s); |
| 3408 | if (ols->st_stateowner->so_is_open_owner |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3409 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
J. Bruce Fields | 97b7e3b | 2011-09-09 11:26:58 -0400 | [diff] [blame] | 3410 | return nfserr_bad_stateid; |
| 3411 | return nfs_ok; |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 3412 | } |
| 3413 | |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3414 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, |
| 3415 | struct nfs4_stid **s, bool sessions, |
| 3416 | struct nfsd_net *nn) |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3417 | { |
| 3418 | struct nfs4_client *cl; |
| 3419 | |
| 3420 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 3421 | return nfserr_bad_stateid; |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 3422 | if (STALE_STATEID(stateid, nn)) |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3423 | return nfserr_stale_stateid; |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 3424 | cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions, nn); |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3425 | if (!cl) |
| 3426 | return nfserr_expired; |
| 3427 | *s = find_stateid_by_type(cl, stateid, typemask); |
| 3428 | if (!*s) |
| 3429 | return nfserr_bad_stateid; |
| 3430 | return nfs_ok; |
| 3431 | |
| 3432 | } |
| 3433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3434 | /* |
| 3435 | * Checks for stateid operations |
| 3436 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3437 | __be32 |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 3438 | nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3439 | stateid_t *stateid, int flags, struct file **filpp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3440 | { |
J. Bruce Fields | 69064a2 | 2011-09-09 11:54:57 -0400 | [diff] [blame] | 3441 | struct nfs4_stid *s; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3442 | struct nfs4_ol_stateid *stp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3443 | struct nfs4_delegation *dp = NULL; |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3444 | struct svc_fh *current_fh = &cstate->current_fh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3445 | struct inode *ino = current_fh->fh_dentry->d_inode; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3446 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3447 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3448 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3449 | if (filpp) |
| 3450 | *filpp = NULL; |
| 3451 | |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 3452 | if (grace_disallows_io(net, ino)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3453 | return nfserr_grace; |
| 3454 | |
| 3455 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 3456 | return check_special_stateids(net, current_fh, stateid, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3457 | |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3458 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, |
| 3459 | &s, cstate->minorversion, nn); |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3460 | if (status) |
| 3461 | return status; |
J. Bruce Fields | 69064a2 | 2011-09-09 11:54:57 -0400 | [diff] [blame] | 3462 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
| 3463 | if (status) |
| 3464 | goto out; |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3465 | switch (s->sc_type) { |
| 3466 | case NFS4_DELEG_STID: |
J. Bruce Fields | 69064a2 | 2011-09-09 11:54:57 -0400 | [diff] [blame] | 3467 | dp = delegstateid(s); |
J. Bruce Fields | dc9bf70 | 2009-02-21 11:14:43 -0800 | [diff] [blame] | 3468 | status = nfs4_check_delegmode(dp, flags); |
| 3469 | if (status) |
| 3470 | goto out; |
Dan Carpenter | 43b0178 | 2010-10-27 23:19:04 +0200 | [diff] [blame] | 3471 | if (filpp) { |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 3472 | *filpp = dp->dl_file->fi_deleg_file; |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 3473 | if (!*filpp) { |
| 3474 | WARN_ON_ONCE(1); |
| 3475 | status = nfserr_serverfault; |
| 3476 | goto out; |
| 3477 | } |
Dan Carpenter | 43b0178 | 2010-10-27 23:19:04 +0200 | [diff] [blame] | 3478 | } |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3479 | break; |
| 3480 | case NFS4_OPEN_STID: |
| 3481 | case NFS4_LOCK_STID: |
J. Bruce Fields | 69064a2 | 2011-09-09 11:54:57 -0400 | [diff] [blame] | 3482 | stp = openlockstateid(s); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3483 | status = nfs4_check_fh(current_fh, stp); |
| 3484 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3485 | goto out; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3486 | if (stp->st_stateowner->so_is_open_owner |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3487 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3488 | goto out; |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 3489 | status = nfs4_check_openmode(stp, flags); |
| 3490 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3491 | goto out; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 3492 | if (filpp) { |
| 3493 | if (flags & RD_STATE) |
| 3494 | *filpp = find_readable_file(stp->st_file); |
| 3495 | else |
| 3496 | *filpp = find_writeable_file(stp->st_file); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 3497 | } |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3498 | break; |
| 3499 | default: |
| 3500 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3501 | } |
| 3502 | status = nfs_ok; |
| 3503 | out: |
| 3504 | return status; |
| 3505 | } |
| 3506 | |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3507 | static __be32 |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3508 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3509 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3510 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3511 | return nfserr_locks_held; |
| 3512 | release_lock_stateid(stp); |
| 3513 | return nfs_ok; |
| 3514 | } |
| 3515 | |
| 3516 | /* |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 3517 | * Test if the stateid is valid |
| 3518 | */ |
| 3519 | __be32 |
| 3520 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 3521 | struct nfsd4_test_stateid *test_stateid) |
| 3522 | { |
Bryan Schumaker | 03cfb42 | 2012-01-27 10:22:49 -0500 | [diff] [blame] | 3523 | struct nfsd4_test_stateid_id *stateid; |
| 3524 | struct nfs4_client *cl = cstate->session->se_client; |
| 3525 | |
| 3526 | nfs4_lock_state(); |
| 3527 | 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] | 3528 | stateid->ts_id_status = |
| 3529 | nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); |
Bryan Schumaker | 03cfb42 | 2012-01-27 10:22:49 -0500 | [diff] [blame] | 3530 | nfs4_unlock_state(); |
| 3531 | |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 3532 | return nfs_ok; |
| 3533 | } |
| 3534 | |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3535 | __be32 |
| 3536 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 3537 | struct nfsd4_free_stateid *free_stateid) |
| 3538 | { |
| 3539 | stateid_t *stateid = &free_stateid->fr_stateid; |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 3540 | struct nfs4_stid *s; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3541 | struct nfs4_client *cl = cstate->session->se_client; |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 3542 | __be32 ret = nfserr_bad_stateid; |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3543 | |
| 3544 | nfs4_lock_state(); |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3545 | s = find_stateid(cl, stateid); |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 3546 | if (!s) |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3547 | goto out; |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 3548 | switch (s->sc_type) { |
| 3549 | case NFS4_DELEG_STID: |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3550 | ret = nfserr_locks_held; |
| 3551 | goto out; |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 3552 | case NFS4_OPEN_STID: |
| 3553 | case NFS4_LOCK_STID: |
| 3554 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
| 3555 | if (ret) |
| 3556 | goto out; |
| 3557 | if (s->sc_type == NFS4_LOCK_STID) |
| 3558 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); |
| 3559 | else |
| 3560 | ret = nfserr_locks_held; |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3561 | break; |
| 3562 | default: |
| 3563 | ret = nfserr_bad_stateid; |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3564 | } |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3565 | out: |
| 3566 | nfs4_unlock_state(); |
| 3567 | return ret; |
| 3568 | } |
| 3569 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 3570 | static inline int |
| 3571 | setlkflg (int type) |
| 3572 | { |
| 3573 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? |
| 3574 | RD_STATE : WR_STATE; |
| 3575 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3576 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3577 | 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] | 3578 | { |
| 3579 | struct svc_fh *current_fh = &cstate->current_fh; |
| 3580 | struct nfs4_stateowner *sop = stp->st_stateowner; |
| 3581 | __be32 status; |
| 3582 | |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3583 | status = nfsd4_check_seqid(cstate, sop, seqid); |
| 3584 | if (status) |
| 3585 | return status; |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3586 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
| 3587 | /* |
| 3588 | * "Closed" stateid's exist *only* to return |
| 3589 | * nfserr_replay_me from the previous step. |
| 3590 | */ |
| 3591 | return nfserr_bad_stateid; |
| 3592 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
| 3593 | if (status) |
| 3594 | return status; |
| 3595 | return nfs4_check_fh(current_fh, stp); |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3596 | } |
| 3597 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3598 | /* |
| 3599 | * Checks for sequence id mutating operations. |
| 3600 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3601 | static __be32 |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3602 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
J. Bruce Fields | 2288d0e | 2011-09-06 15:50:21 -0400 | [diff] [blame] | 3603 | stateid_t *stateid, char typemask, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3604 | struct nfs4_ol_stateid **stpp, |
| 3605 | struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3606 | { |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 3607 | __be32 status; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3608 | struct nfs4_stid *s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3609 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 3610 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
| 3611 | seqid, STATEID_VAL(stateid)); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 3612 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3613 | *stpp = NULL; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3614 | status = nfsd4_lookup_stateid(stateid, typemask, &s, |
| 3615 | cstate->minorversion, nn); |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3616 | if (status) |
| 3617 | return status; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3618 | *stpp = openlockstateid(s); |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3619 | cstate->replay_owner = (*stpp)->st_stateowner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3620 | |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3621 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
| 3622 | } |
J. Bruce Fields | 39325bd | 2007-11-26 17:06:39 -0500 | [diff] [blame] | 3623 | |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3624 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
| 3625 | 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] | 3626 | { |
| 3627 | __be32 status; |
| 3628 | struct nfs4_openowner *oo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3629 | |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3630 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3631 | NFS4_OPEN_STID, stpp, nn); |
J. Bruce Fields | 7a8711c | 2011-09-02 09:03:37 -0400 | [diff] [blame] | 3632 | if (status) |
| 3633 | return status; |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3634 | oo = openowner((*stpp)->st_stateowner); |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3635 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 3636 | return nfserr_bad_stateid; |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 3637 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3638 | } |
| 3639 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3640 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3641 | 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] | 3642 | struct nfsd4_open_confirm *oc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3643 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3644 | __be32 status; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3645 | struct nfs4_openowner *oo; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3646 | struct nfs4_ol_stateid *stp; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3647 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3648 | |
| 3649 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3650 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 3651 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3652 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3653 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
J. Bruce Fields | a8cddc5 | 2006-06-30 01:56:13 -0700 | [diff] [blame] | 3654 | if (status) |
| 3655 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3656 | |
| 3657 | nfs4_lock_state(); |
| 3658 | |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 3659 | status = nfs4_preprocess_seqid_op(cstate, |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3660 | oc->oc_seqid, &oc->oc_req_stateid, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3661 | NFS4_OPEN_STID, &stp, nn); |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 3662 | if (status) |
J. Bruce Fields | 68b66e8 | 2011-09-02 12:19:43 -0400 | [diff] [blame] | 3663 | goto out; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3664 | oo = openowner(stp->st_stateowner); |
J. Bruce Fields | 68b66e8 | 2011-09-02 12:19:43 -0400 | [diff] [blame] | 3665 | status = nfserr_bad_stateid; |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3666 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
J. Bruce Fields | 68b66e8 | 2011-09-02 12:19:43 -0400 | [diff] [blame] | 3667 | goto out; |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3668 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3669 | update_stateid(&stp->st_stid.sc_stateid); |
| 3670 | memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 3671 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3672 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 3673 | |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 3674 | nfsd4_client_record_create(oo->oo_owner.so_client); |
J. Bruce Fields | 68b66e8 | 2011-09-02 12:19:43 -0400 | [diff] [blame] | 3675 | status = nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3676 | out: |
J. Bruce Fields | 5ec094c | 2011-08-30 17:02:48 -0400 | [diff] [blame] | 3677 | if (!cstate->replay_owner) |
| 3678 | nfs4_unlock_state(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3679 | return status; |
| 3680 | } |
| 3681 | |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 3682 | 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] | 3683 | { |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 3684 | if (!test_access(access, stp)) |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 3685 | return; |
| 3686 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 3687 | clear_access(access, stp); |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 3688 | } |
J. Bruce Fields | f197c27 | 2011-06-29 08:23:50 -0400 | [diff] [blame] | 3689 | |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 3690 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
| 3691 | { |
| 3692 | switch (to_access) { |
| 3693 | case NFS4_SHARE_ACCESS_READ: |
| 3694 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); |
| 3695 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); |
| 3696 | break; |
| 3697 | case NFS4_SHARE_ACCESS_WRITE: |
| 3698 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); |
| 3699 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); |
| 3700 | break; |
| 3701 | case NFS4_SHARE_ACCESS_BOTH: |
| 3702 | break; |
| 3703 | default: |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 3704 | WARN_ON_ONCE(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3705 | } |
| 3706 | } |
| 3707 | |
| 3708 | static void |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 3709 | reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3710 | { |
| 3711 | int i; |
| 3712 | for (i = 0; i < 4; i++) { |
| 3713 | if ((i & deny) != i) |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 3714 | clear_deny(i, stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3715 | } |
| 3716 | } |
| 3717 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3718 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3719 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
| 3720 | struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3721 | struct nfsd4_open_downgrade *od) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3722 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3723 | __be32 status; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3724 | struct nfs4_ol_stateid *stp; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3725 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3726 | |
| 3727 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3728 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 3729 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3730 | |
J. Bruce Fields | c30e92d | 2011-10-10 17:34:31 -0400 | [diff] [blame] | 3731 | /* We don't yet support WANT bits: */ |
Benny Halevy | 2c8bd7e | 2012-02-16 20:57:09 +0200 | [diff] [blame] | 3732 | if (od->od_deleg_want) |
| 3733 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, |
| 3734 | od->od_deleg_want); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3735 | |
| 3736 | nfs4_lock_state(); |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3737 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3738 | &od->od_stateid, &stp, nn); |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 3739 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3740 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3741 | status = nfserr_inval; |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 3742 | if (!test_access(od->od_share_access, stp)) { |
| 3743 | dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3744 | stp->st_access_bmap, od->od_share_access); |
| 3745 | goto out; |
| 3746 | } |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 3747 | if (!test_deny(od->od_share_deny, stp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3748 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
| 3749 | stp->st_deny_bmap, od->od_share_deny); |
| 3750 | goto out; |
| 3751 | } |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 3752 | nfs4_stateid_downgrade(stp, od->od_share_access); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3753 | |
Jeff Layton | ce0fc43 | 2012-05-11 09:45:14 -0400 | [diff] [blame] | 3754 | reset_union_bmap_deny(od->od_share_deny, stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3755 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3756 | update_stateid(&stp->st_stid.sc_stateid); |
| 3757 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3758 | status = nfs_ok; |
| 3759 | out: |
J. Bruce Fields | 5ec094c | 2011-08-30 17:02:48 -0400 | [diff] [blame] | 3760 | if (!cstate->replay_owner) |
| 3761 | nfs4_unlock_state(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3762 | return status; |
| 3763 | } |
| 3764 | |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 3765 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
| 3766 | { |
| 3767 | struct nfs4_openowner *oo; |
| 3768 | struct nfs4_ol_stateid *s; |
| 3769 | |
| 3770 | if (!so->so_is_open_owner) |
| 3771 | return; |
| 3772 | oo = openowner(so); |
| 3773 | s = oo->oo_last_closed_stid; |
| 3774 | if (!s) |
| 3775 | return; |
| 3776 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { |
| 3777 | /* Release the last_closed_stid on the next seqid bump: */ |
| 3778 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; |
| 3779 | return; |
| 3780 | } |
| 3781 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3782 | release_last_closed_stateid(oo); |
| 3783 | } |
| 3784 | |
| 3785 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
| 3786 | { |
| 3787 | unhash_open_stateid(s); |
| 3788 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 3789 | } |
| 3790 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3791 | /* |
| 3792 | * nfs4_unlock_state() called after encode |
| 3793 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3794 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3795 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3796 | struct nfsd4_close *close) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3797 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3798 | __be32 status; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3799 | struct nfs4_openowner *oo; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3800 | struct nfs4_ol_stateid *stp; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3801 | struct net *net = SVC_NET(rqstp); |
| 3802 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3803 | |
| 3804 | dprintk("NFSD: nfsd4_close on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3805 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 3806 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3807 | |
| 3808 | nfs4_lock_state(); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3809 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
| 3810 | &close->cl_stateid, |
| 3811 | NFS4_OPEN_STID|NFS4_CLOSED_STID, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3812 | &stp, nn); |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 3813 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3814 | goto out; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3815 | oo = openowner(stp->st_stateowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3816 | status = nfs_ok; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3817 | update_stateid(&stp->st_stid.sc_stateid); |
| 3818 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3819 | |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3820 | nfsd4_close_open_stateid(stp); |
J. Bruce Fields | cf9182e | 2012-08-29 15:21:58 -0700 | [diff] [blame] | 3821 | release_last_closed_stateid(oo); |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 3822 | oo->oo_last_closed_stid = stp; |
J. Bruce Fields | 04ef595 | 2006-01-18 17:43:21 -0800 | [diff] [blame] | 3823 | |
J. Bruce Fields | 74dbafa | 2012-06-06 12:53:48 -0400 | [diff] [blame] | 3824 | if (list_empty(&oo->oo_owner.so_stateids)) { |
| 3825 | if (cstate->minorversion) { |
| 3826 | release_openowner(oo); |
| 3827 | cstate->replay_owner = NULL; |
| 3828 | } else { |
| 3829 | /* |
| 3830 | * In the 4.0 case we need to keep the owners around a |
| 3831 | * little while to handle CLOSE replay. |
| 3832 | */ |
| 3833 | if (list_empty(&oo->oo_owner.so_stateids)) |
Stanislav Kinsbursky | 73758fed | 2012-11-14 18:22:01 +0300 | [diff] [blame] | 3834 | move_to_close_lru(oo, SVC_NET(rqstp)); |
J. Bruce Fields | 74dbafa | 2012-06-06 12:53:48 -0400 | [diff] [blame] | 3835 | } |
| 3836 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3837 | out: |
J. Bruce Fields | 5ec094c | 2011-08-30 17:02:48 -0400 | [diff] [blame] | 3838 | if (!cstate->replay_owner) |
| 3839 | nfs4_unlock_state(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3840 | return status; |
| 3841 | } |
| 3842 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3843 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3844 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 3845 | struct nfsd4_delegreturn *dr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3846 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3847 | struct nfs4_delegation *dp; |
| 3848 | stateid_t *stateid = &dr->dr_stateid; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3849 | struct nfs4_stid *s; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3850 | __be32 status; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3851 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3852 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3853 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3854 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3855 | |
| 3856 | nfs4_lock_state(); |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 3857 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, |
| 3858 | cstate->minorversion, nn); |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3859 | if (status) |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3860 | goto out; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3861 | dp = delegstateid(s); |
J. Bruce Fields | d5477a8 | 2011-09-08 12:07:44 -0400 | [diff] [blame] | 3862 | 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] | 3863 | if (status) |
| 3864 | goto out; |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3865 | |
| 3866 | unhash_delegation(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3867 | out: |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3868 | nfs4_unlock_state(); |
| 3869 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3870 | return status; |
| 3871 | } |
| 3872 | |
| 3873 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3874 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3875 | |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3876 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3877 | |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3878 | static inline u64 |
| 3879 | end_offset(u64 start, u64 len) |
| 3880 | { |
| 3881 | u64 end; |
| 3882 | |
| 3883 | end = start + len; |
| 3884 | return end >= start ? end: NFS4_MAX_UINT64; |
| 3885 | } |
| 3886 | |
| 3887 | /* last octet in a range */ |
| 3888 | static inline u64 |
| 3889 | last_byte_offset(u64 start, u64 len) |
| 3890 | { |
| 3891 | u64 end; |
| 3892 | |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 3893 | WARN_ON_ONCE(!len); |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3894 | end = start + len; |
| 3895 | return end > start ? end - 1: NFS4_MAX_UINT64; |
| 3896 | } |
| 3897 | |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3898 | static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3899 | { |
| 3900 | return (file_hashval(inode) + cl_id |
| 3901 | + opaque_hashval(ownername->data, ownername->len)) |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3902 | & LOCKOWNER_INO_HASH_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3903 | } |
| 3904 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3905 | /* |
| 3906 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that |
| 3907 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th |
| 3908 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit |
| 3909 | * locking, this prevents us from being completely protocol-compliant. The |
| 3910 | * real solution to this problem is to start using unsigned file offsets in |
| 3911 | * the VFS, but this is a very deep change! |
| 3912 | */ |
| 3913 | static inline void |
| 3914 | nfs4_transform_lock_offset(struct file_lock *lock) |
| 3915 | { |
| 3916 | if (lock->fl_start < 0) |
| 3917 | lock->fl_start = OFFSET_MAX; |
| 3918 | if (lock->fl_end < 0) |
| 3919 | lock->fl_end = OFFSET_MAX; |
| 3920 | } |
| 3921 | |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3922 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
| 3923 | * as a unique cookie to identify our (NFSv4's) posix locks. */ |
Alexey Dobriyan | 7b02196 | 2009-09-21 17:01:12 -0700 | [diff] [blame] | 3924 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3925 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3926 | |
| 3927 | static inline void |
| 3928 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) |
| 3929 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3930 | struct nfs4_lockowner *lo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3931 | |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3932 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3933 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
| 3934 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, |
| 3935 | lo->lo_owner.so_owner.len, GFP_KERNEL); |
J. Bruce Fields | 7c13f34 | 2011-08-30 22:15:47 -0400 | [diff] [blame] | 3936 | if (!deny->ld_owner.data) |
| 3937 | /* We just don't care that much */ |
| 3938 | goto nevermind; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3939 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
| 3940 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3941 | } else { |
J. Bruce Fields | 7c13f34 | 2011-08-30 22:15:47 -0400 | [diff] [blame] | 3942 | nevermind: |
| 3943 | deny->ld_owner.len = 0; |
| 3944 | deny->ld_owner.data = NULL; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3945 | deny->ld_clientid.cl_boot = 0; |
| 3946 | deny->ld_clientid.cl_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3947 | } |
| 3948 | deny->ld_start = fl->fl_start; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3949 | deny->ld_length = NFS4_MAX_UINT64; |
| 3950 | if (fl->fl_end != NFS4_MAX_UINT64) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3951 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
| 3952 | deny->ld_type = NFS4_READ_LT; |
| 3953 | if (fl->fl_type != F_RDLCK) |
| 3954 | deny->ld_type = NFS4_WRITE_LT; |
| 3955 | } |
| 3956 | |
J. Bruce Fields | b93d87c | 2011-11-07 16:37:57 -0500 | [diff] [blame] | 3957 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
| 3958 | { |
| 3959 | struct nfs4_ol_stateid *lst; |
| 3960 | |
| 3961 | if (!same_owner_str(&lo->lo_owner, owner, clid)) |
| 3962 | return false; |
| 3963 | lst = list_first_entry(&lo->lo_owner.so_stateids, |
| 3964 | struct nfs4_ol_stateid, st_perstateowner); |
| 3965 | return lst->st_file->fi_inode == inode; |
| 3966 | } |
| 3967 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3968 | static struct nfs4_lockowner * |
| 3969 | find_lockowner_str(struct inode *inode, clientid_t *clid, |
Stanislav Kinsbursky | 20e9e2b | 2012-11-14 18:21:46 +0300 | [diff] [blame] | 3970 | struct xdr_netobj *owner, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3971 | { |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3972 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
J. Bruce Fields | b93d87c | 2011-11-07 16:37:57 -0500 | [diff] [blame] | 3973 | struct nfs4_lockowner *lo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3974 | |
Stanislav Kinsbursky | 20e9e2b | 2012-11-14 18:21:46 +0300 | [diff] [blame] | 3975 | list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
J. Bruce Fields | b93d87c | 2011-11-07 16:37:57 -0500 | [diff] [blame] | 3976 | if (same_lockowner_ino(lo, inode, clid, owner)) |
| 3977 | return lo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3978 | } |
| 3979 | return NULL; |
| 3980 | } |
| 3981 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3982 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 3983 | { |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3984 | struct inode *inode = open_stp->st_file->fi_inode; |
| 3985 | unsigned int inohash = lockowner_ino_hashval(inode, |
| 3986 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); |
Stanislav Kinsbursky | 9b53113 | 2012-11-14 18:21:41 +0300 | [diff] [blame] | 3987 | struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3988 | |
Stanislav Kinsbursky | 9b53113 | 2012-11-14 18:21:41 +0300 | [diff] [blame] | 3989 | list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); |
Stanislav Kinsbursky | 20e9e2b | 2012-11-14 18:21:46 +0300 | [diff] [blame] | 3990 | list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3991 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 3992 | } |
| 3993 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3994 | /* |
| 3995 | * Alloc a lock owner structure. |
| 3996 | * 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] | 3997 | * occurred. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3998 | * |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 3999 | * strhashval = ownerstr_hashval |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4000 | */ |
| 4001 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4002 | static struct nfs4_lockowner * |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4003 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4004 | struct nfs4_lockowner *lo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4005 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4006 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
| 4007 | if (!lo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4008 | return NULL; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4009 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
| 4010 | lo->lo_owner.so_is_open_owner = 0; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 4011 | /* It is the openowner seqid that will be incremented in encode in the |
| 4012 | * case of new lockowners; so increment the lock seqid manually: */ |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4013 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
| 4014 | hash_lockowner(lo, strhashval, clp, open_stp); |
| 4015 | return lo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4016 | } |
| 4017 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4018 | static struct nfs4_ol_stateid * |
| 4019 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4020 | { |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4021 | struct nfs4_ol_stateid *stp; |
J. Bruce Fields | d3b313a | 2011-09-15 15:02:41 -0400 | [diff] [blame] | 4022 | struct nfs4_client *clp = lo->lo_owner.so_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4023 | |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 4024 | stp = nfs4_alloc_stateid(clp); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 4025 | if (stp == NULL) |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 4026 | return NULL; |
J. Bruce Fields | 3abdb60 | 2013-02-03 12:23:01 -0500 | [diff] [blame] | 4027 | stp->st_stid.sc_type = NFS4_LOCK_STID; |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 4028 | list_add(&stp->st_perfile, &fp->fi_stateids); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4029 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
| 4030 | stp->st_stateowner = &lo->lo_owner; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 4031 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4032 | stp->st_file = fp; |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 4033 | stp->st_access_bmap = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4034 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 4035 | stp->st_openstp = open_stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4036 | return stp; |
| 4037 | } |
| 4038 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 4039 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4040 | check_lock_length(u64 offset, u64 length) |
| 4041 | { |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 4042 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4043 | LOFF_OVERFLOW(offset, length))); |
| 4044 | } |
| 4045 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4046 | 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] | 4047 | { |
| 4048 | struct nfs4_file *fp = lock_stp->st_file; |
| 4049 | int oflag = nfs4_access_to_omode(access); |
| 4050 | |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 4051 | if (test_access(access, lock_stp)) |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 4052 | return; |
| 4053 | nfs4_file_get_access(fp, oflag); |
Jeff Layton | 82c5ff1 | 2012-05-11 09:45:13 -0400 | [diff] [blame] | 4054 | set_access(access, lock_stp); |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 4055 | } |
| 4056 | |
J. Bruce Fields | 2355c59 | 2012-04-25 16:56:22 -0400 | [diff] [blame] | 4057 | static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new) |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4058 | { |
| 4059 | struct nfs4_file *fi = ost->st_file; |
| 4060 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
| 4061 | struct nfs4_client *cl = oo->oo_owner.so_client; |
| 4062 | struct nfs4_lockowner *lo; |
| 4063 | unsigned int strhashval; |
Stanislav Kinsbursky | 20e9e2b | 2012-11-14 18:21:46 +0300 | [diff] [blame] | 4064 | struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4065 | |
Stanislav Kinsbursky | 20e9e2b | 2012-11-14 18:21:46 +0300 | [diff] [blame] | 4066 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, |
| 4067 | &lock->v.new.owner, nn); |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4068 | if (lo) { |
| 4069 | if (!cstate->minorversion) |
| 4070 | return nfserr_bad_seqid; |
| 4071 | /* XXX: a lockowner always has exactly one stateid: */ |
| 4072 | *lst = list_first_entry(&lo->lo_owner.so_stateids, |
| 4073 | struct nfs4_ol_stateid, st_perstateowner); |
| 4074 | return nfs_ok; |
| 4075 | } |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 4076 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4077 | &lock->v.new.owner); |
| 4078 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
| 4079 | if (lo == NULL) |
| 4080 | return nfserr_jukebox; |
| 4081 | *lst = alloc_init_lock_stateid(lo, fi, ost); |
| 4082 | if (*lst == NULL) { |
| 4083 | release_lockowner(lo); |
| 4084 | return nfserr_jukebox; |
| 4085 | } |
| 4086 | *new = true; |
| 4087 | return nfs_ok; |
| 4088 | } |
| 4089 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4090 | /* |
| 4091 | * LOCK operation |
| 4092 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4093 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 4094 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 4095 | struct nfsd4_lock *lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4096 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4097 | struct nfs4_openowner *open_sop = NULL; |
| 4098 | struct nfs4_lockowner *lock_sop = NULL; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4099 | struct nfs4_ol_stateid *lock_stp; |
J. Bruce Fields | 7d94784 | 2010-08-20 18:09:31 -0400 | [diff] [blame] | 4100 | struct file *filp = NULL; |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4101 | struct file_lock *file_lock = NULL; |
| 4102 | struct file_lock *conflock = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4103 | __be32 status = 0; |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4104 | bool new_state = false; |
J. Bruce Fields | b34f27a | 2011-08-22 13:13:31 -0400 | [diff] [blame] | 4105 | int lkflg; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 4106 | int err; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 4107 | struct net *net = SVC_NET(rqstp); |
| 4108 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4109 | |
| 4110 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", |
| 4111 | (long long) lock->lk_offset, |
| 4112 | (long long) lock->lk_length); |
| 4113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4114 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
| 4115 | return nfserr_inval; |
| 4116 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 4117 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 4118 | S_IFREG, NFSD_MAY_LOCK))) { |
Andy Adamson | a6f6ef2 | 2006-01-18 17:43:17 -0800 | [diff] [blame] | 4119 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
| 4120 | return status; |
| 4121 | } |
| 4122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4123 | nfs4_lock_state(); |
| 4124 | |
| 4125 | if (lock->lk_is_new) { |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4126 | struct nfs4_ol_stateid *open_stp = NULL; |
J. Bruce Fields | 684e563 | 2011-11-04 17:08:10 -0400 | [diff] [blame] | 4127 | |
| 4128 | if (nfsd4_has_session(cstate)) |
| 4129 | /* See rfc 5661 18.10.3: given clientid is ignored: */ |
| 4130 | memcpy(&lock->v.new.clientid, |
| 4131 | &cstate->session->se_client->cl_clientid, |
| 4132 | sizeof(clientid_t)); |
| 4133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4134 | status = nfserr_stale_clientid; |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 4135 | if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4136 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4138 | /* validate and update open stateid and open seqid */ |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 4139 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4140 | lock->lk_new_open_seqid, |
| 4141 | &lock->lk_new_open_stateid, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 4142 | &open_stp, nn); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 4143 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4144 | goto out; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4145 | open_sop = openowner(open_stp->st_stateowner); |
J. Bruce Fields | b34f27a | 2011-08-22 13:13:31 -0400 | [diff] [blame] | 4146 | status = nfserr_bad_stateid; |
J. Bruce Fields | 684e563 | 2011-11-04 17:08:10 -0400 | [diff] [blame] | 4147 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
J. Bruce Fields | b34f27a | 2011-08-22 13:13:31 -0400 | [diff] [blame] | 4148 | &lock->v.new.clientid)) |
| 4149 | goto out; |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4150 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
| 4151 | &lock_stp, &new_state); |
J. Bruce Fields | e1aaa89 | 2012-06-06 16:01:37 -0400 | [diff] [blame] | 4152 | } else |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 4153 | status = nfs4_preprocess_seqid_op(cstate, |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4154 | lock->lk_old_lock_seqid, |
| 4155 | &lock->lk_old_lock_stateid, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 4156 | NFS4_LOCK_STID, &lock_stp, nn); |
J. Bruce Fields | e1aaa89 | 2012-06-06 16:01:37 -0400 | [diff] [blame] | 4157 | if (status) |
| 4158 | goto out; |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4159 | lock_sop = lockowner(lock_stp->st_stateowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4160 | |
J. Bruce Fields | b34f27a | 2011-08-22 13:13:31 -0400 | [diff] [blame] | 4161 | lkflg = setlkflg(lock->lk_type); |
| 4162 | status = nfs4_check_openmode(lock_stp, lkflg); |
| 4163 | if (status) |
| 4164 | goto out; |
| 4165 | |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 4166 | status = nfserr_grace; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 4167 | if (locks_in_grace(net) && !lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 4168 | goto out; |
| 4169 | status = nfserr_no_grace; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 4170 | if (!locks_in_grace(net) && lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 4171 | goto out; |
| 4172 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4173 | file_lock = locks_alloc_lock(); |
| 4174 | if (!file_lock) { |
| 4175 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); |
| 4176 | status = nfserr_jukebox; |
| 4177 | goto out; |
| 4178 | } |
| 4179 | |
| 4180 | locks_init_lock(file_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4181 | switch (lock->lk_type) { |
| 4182 | case NFS4_READ_LT: |
| 4183 | case NFS4_READW_LT: |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 4184 | filp = find_readable_file(lock_stp->st_file); |
| 4185 | if (filp) |
| 4186 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4187 | file_lock->fl_type = F_RDLCK; |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 4188 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4189 | case NFS4_WRITE_LT: |
| 4190 | case NFS4_WRITEW_LT: |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 4191 | filp = find_writeable_file(lock_stp->st_file); |
| 4192 | if (filp) |
| 4193 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4194 | file_lock->fl_type = F_WRLCK; |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 4195 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4196 | default: |
| 4197 | status = nfserr_inval; |
| 4198 | goto out; |
| 4199 | } |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 4200 | if (!filp) { |
| 4201 | status = nfserr_openmode; |
| 4202 | goto out; |
| 4203 | } |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4204 | file_lock->fl_owner = (fl_owner_t)lock_sop; |
| 4205 | file_lock->fl_pid = current->tgid; |
| 4206 | file_lock->fl_file = filp; |
| 4207 | file_lock->fl_flags = FL_POSIX; |
| 4208 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
| 4209 | file_lock->fl_start = lock->lk_offset; |
| 4210 | file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
| 4211 | nfs4_transform_lock_offset(file_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4212 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4213 | conflock = locks_alloc_lock(); |
| 4214 | if (!conflock) { |
| 4215 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); |
| 4216 | status = nfserr_jukebox; |
| 4217 | goto out; |
| 4218 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4219 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4220 | err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 4221 | switch (-err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4222 | case 0: /* success! */ |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4223 | update_stateid(&lock_stp->st_stid.sc_stateid); |
| 4224 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4225 | sizeof(stateid_t)); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 4226 | status = 0; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 4227 | break; |
| 4228 | case (EAGAIN): /* conflock holds conflicting lock */ |
| 4229 | status = nfserr_denied; |
| 4230 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4231 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 4232 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4233 | case (EDEADLK): |
| 4234 | status = nfserr_deadlock; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 4235 | break; |
J. Bruce Fields | 3e77246 | 2011-08-10 19:07:33 -0400 | [diff] [blame] | 4236 | default: |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 4237 | 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] | 4238 | status = nfserrno(err); |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 4239 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4240 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4241 | out: |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4242 | if (status && new_state) |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 4243 | release_lockowner(lock_sop); |
J. Bruce Fields | 5ec094c | 2011-08-30 17:02:48 -0400 | [diff] [blame] | 4244 | if (!cstate->replay_owner) |
| 4245 | nfs4_unlock_state(); |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4246 | if (file_lock) |
| 4247 | locks_free_lock(file_lock); |
| 4248 | if (conflock) |
| 4249 | locks_free_lock(conflock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4250 | return status; |
| 4251 | } |
| 4252 | |
| 4253 | /* |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 4254 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, |
| 4255 | * so we do a temporary open here just to get an open file to pass to |
| 4256 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an |
| 4257 | * inode operation.) |
| 4258 | */ |
Al Viro | 04da6e9 | 2012-04-13 00:00:04 -0400 | [diff] [blame] | 4259 | 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] | 4260 | { |
| 4261 | struct file *file; |
Al Viro | 04da6e9 | 2012-04-13 00:00:04 -0400 | [diff] [blame] | 4262 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
| 4263 | if (!err) { |
| 4264 | err = nfserrno(vfs_test_lock(file, lock)); |
| 4265 | nfsd_close(file); |
| 4266 | } |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 4267 | return err; |
| 4268 | } |
| 4269 | |
| 4270 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4271 | * LOCKT operation |
| 4272 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4273 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 4274 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 4275 | struct nfsd4_lockt *lockt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4276 | { |
| 4277 | struct inode *inode; |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4278 | struct file_lock *file_lock = NULL; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4279 | struct nfs4_lockowner *lo; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4280 | __be32 status; |
Stanislav Kinsbursky | 7f2210f | 2012-11-14 18:21:05 +0300 | [diff] [blame] | 4281 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4282 | |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 4283 | if (locks_in_grace(SVC_NET(rqstp))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4284 | return nfserr_grace; |
| 4285 | |
| 4286 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) |
| 4287 | return nfserr_inval; |
| 4288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4289 | nfs4_lock_state(); |
| 4290 | |
J. Bruce Fields | 9b2ef62 | 2012-12-03 17:24:41 -0500 | [diff] [blame] | 4291 | if (!nfsd4_has_session(cstate)) { |
| 4292 | status = lookup_clientid(&lockt->lt_clientid, false, nn, NULL); |
| 4293 | if (status) |
| 4294 | goto out; |
| 4295 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4296 | |
J. Bruce Fields | 75c096f | 2011-08-15 18:39:32 -0400 | [diff] [blame] | 4297 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4298 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4299 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 4300 | inode = cstate->current_fh.fh_dentry->d_inode; |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4301 | file_lock = locks_alloc_lock(); |
| 4302 | if (!file_lock) { |
| 4303 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); |
| 4304 | status = nfserr_jukebox; |
| 4305 | goto out; |
| 4306 | } |
| 4307 | locks_init_lock(file_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4308 | switch (lockt->lt_type) { |
| 4309 | case NFS4_READ_LT: |
| 4310 | case NFS4_READW_LT: |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4311 | file_lock->fl_type = F_RDLCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4312 | break; |
| 4313 | case NFS4_WRITE_LT: |
| 4314 | case NFS4_WRITEW_LT: |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4315 | file_lock->fl_type = F_WRLCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4316 | break; |
| 4317 | default: |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 4318 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4319 | status = nfserr_inval; |
| 4320 | goto out; |
| 4321 | } |
| 4322 | |
Stanislav Kinsbursky | 20e9e2b | 2012-11-14 18:21:46 +0300 | [diff] [blame] | 4323 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4324 | if (lo) |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4325 | file_lock->fl_owner = (fl_owner_t)lo; |
| 4326 | file_lock->fl_pid = current->tgid; |
| 4327 | file_lock->fl_flags = FL_POSIX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4328 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4329 | file_lock->fl_start = lockt->lt_offset; |
| 4330 | 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] | 4331 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4332 | nfs4_transform_lock_offset(file_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4333 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4334 | status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); |
Al Viro | 04da6e9 | 2012-04-13 00:00:04 -0400 | [diff] [blame] | 4335 | if (status) |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 4336 | goto out; |
Al Viro | 04da6e9 | 2012-04-13 00:00:04 -0400 | [diff] [blame] | 4337 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4338 | if (file_lock->fl_type != F_UNLCK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4339 | status = nfserr_denied; |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4340 | nfs4_set_lock_denied(file_lock, &lockt->lt_denied); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4341 | } |
| 4342 | out: |
| 4343 | nfs4_unlock_state(); |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4344 | if (file_lock) |
| 4345 | locks_free_lock(file_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4346 | return status; |
| 4347 | } |
| 4348 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4349 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 4350 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 4351 | struct nfsd4_locku *locku) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4352 | { |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4353 | struct nfs4_ol_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4354 | struct file *filp = NULL; |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4355 | struct file_lock *file_lock = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4356 | __be32 status; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 4357 | int err; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 4358 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| 4359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4360 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
| 4361 | (long long) locku->lu_offset, |
| 4362 | (long long) locku->lu_length); |
| 4363 | |
| 4364 | if (check_lock_length(locku->lu_offset, locku->lu_length)) |
| 4365 | return nfserr_inval; |
| 4366 | |
| 4367 | nfs4_lock_state(); |
| 4368 | |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 4369 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 4370 | &locku->lu_stateid, NFS4_LOCK_STID, |
| 4371 | &stp, nn); |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 4372 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4373 | goto out; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 4374 | filp = find_any_file(stp->st_file); |
| 4375 | if (!filp) { |
| 4376 | status = nfserr_lock_range; |
| 4377 | goto out; |
| 4378 | } |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4379 | file_lock = locks_alloc_lock(); |
| 4380 | if (!file_lock) { |
| 4381 | dprintk("NFSD: %s: unable to allocate lock!\n", __func__); |
| 4382 | status = nfserr_jukebox; |
| 4383 | goto out; |
| 4384 | } |
| 4385 | locks_init_lock(file_lock); |
| 4386 | file_lock->fl_type = F_UNLCK; |
| 4387 | file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
| 4388 | file_lock->fl_pid = current->tgid; |
| 4389 | file_lock->fl_file = filp; |
| 4390 | file_lock->fl_flags = FL_POSIX; |
| 4391 | file_lock->fl_lmops = &nfsd_posix_mng_ops; |
| 4392 | file_lock->fl_start = locku->lu_offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4393 | |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4394 | file_lock->fl_end = last_byte_offset(locku->lu_offset, |
| 4395 | locku->lu_length); |
| 4396 | nfs4_transform_lock_offset(file_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4397 | |
| 4398 | /* |
| 4399 | * Try to unlock the file in the VFS. |
| 4400 | */ |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4401 | err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 4402 | if (err) { |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 4403 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4404 | goto out_nfserr; |
| 4405 | } |
| 4406 | /* |
| 4407 | * OK, unlock succeeded; the only thing left to do is update the stateid. |
| 4408 | */ |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4409 | update_stateid(&stp->st_stid.sc_stateid); |
| 4410 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4411 | |
| 4412 | out: |
J. Bruce Fields | 71c3bcd | 2011-09-27 21:42:29 -0400 | [diff] [blame] | 4413 | if (!cstate->replay_owner) |
| 4414 | nfs4_unlock_state(); |
Jeff Layton | 21179d8 | 2012-08-21 08:03:32 -0400 | [diff] [blame] | 4415 | if (file_lock) |
| 4416 | locks_free_lock(file_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4417 | return status; |
| 4418 | |
| 4419 | out_nfserr: |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 4420 | status = nfserrno(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4421 | goto out; |
| 4422 | } |
| 4423 | |
| 4424 | /* |
| 4425 | * returns |
| 4426 | * 1: locks held by lockowner |
| 4427 | * 0: no locks held by lockowner |
| 4428 | */ |
| 4429 | static int |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4430 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4431 | { |
| 4432 | struct file_lock **flpp; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 4433 | struct inode *inode = filp->fi_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4434 | int status = 0; |
| 4435 | |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 4436 | lock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4437 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 4438 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4439 | status = 1; |
| 4440 | goto out; |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 4441 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4442 | } |
| 4443 | out: |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 4444 | unlock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4445 | return status; |
| 4446 | } |
| 4447 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4448 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 4449 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
| 4450 | struct nfsd4_compound_state *cstate, |
| 4451 | struct nfsd4_release_lockowner *rlockowner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4452 | { |
| 4453 | clientid_t *clid = &rlockowner->rl_clientid; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 4454 | struct nfs4_stateowner *sop; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4455 | struct nfs4_lockowner *lo; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4456 | struct nfs4_ol_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4457 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 4458 | struct list_head matches; |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 4459 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4460 | __be32 status; |
Stanislav Kinsbursky | 7f2210f | 2012-11-14 18:21:05 +0300 | [diff] [blame] | 4461 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4462 | |
| 4463 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", |
| 4464 | clid->cl_boot, clid->cl_id); |
| 4465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4466 | nfs4_lock_state(); |
| 4467 | |
J. Bruce Fields | 9b2ef62 | 2012-12-03 17:24:41 -0500 | [diff] [blame] | 4468 | status = lookup_clientid(clid, cstate->minorversion, nn, NULL); |
| 4469 | if (status) |
| 4470 | goto out; |
| 4471 | |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 4472 | status = nfserr_locks_held; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 4473 | INIT_LIST_HEAD(&matches); |
J. Bruce Fields | 06f1f86 | 2011-11-07 16:58:18 -0500 | [diff] [blame] | 4474 | |
Stanislav Kinsbursky | 9b53113 | 2012-11-14 18:21:41 +0300 | [diff] [blame] | 4475 | list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 4476 | if (sop->so_is_open_owner) |
| 4477 | continue; |
J. Bruce Fields | 06f1f86 | 2011-11-07 16:58:18 -0500 | [diff] [blame] | 4478 | if (!same_owner_str(sop, owner, clid)) |
| 4479 | continue; |
| 4480 | list_for_each_entry(stp, &sop->so_stateids, |
| 4481 | st_perstateowner) { |
| 4482 | lo = lockowner(sop); |
| 4483 | if (check_for_locks(stp->st_file, lo)) |
| 4484 | goto out; |
| 4485 | list_add(&lo->lo_list, &matches); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4486 | } |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 4487 | } |
| 4488 | /* Clients probably won't expect us to return with some (but not all) |
| 4489 | * of the lockowner state released; so don't release any until all |
| 4490 | * have been checked. */ |
| 4491 | status = nfs_ok; |
NeilBrown | 0fa822e | 2005-07-07 17:59:14 -0700 | [diff] [blame] | 4492 | while (!list_empty(&matches)) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4493 | lo = list_entry(matches.next, struct nfs4_lockowner, |
| 4494 | lo_list); |
NeilBrown | 0fa822e | 2005-07-07 17:59:14 -0700 | [diff] [blame] | 4495 | /* unhash_stateowner deletes so_perclient only |
| 4496 | * for openowners. */ |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4497 | list_del(&lo->lo_list); |
| 4498 | release_lockowner(lo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4499 | } |
| 4500 | out: |
| 4501 | nfs4_unlock_state(); |
| 4502 | return status; |
| 4503 | } |
| 4504 | |
| 4505 | static inline struct nfs4_client_reclaim * |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 4506 | alloc_reclaim(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4507 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 4508 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4509 | } |
| 4510 | |
Jeff Layton | 0ce0c2b | 2012-11-12 15:00:55 -0500 | [diff] [blame] | 4511 | bool |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 4512 | nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 4513 | { |
Jeff Layton | 0ce0c2b | 2012-11-12 15:00:55 -0500 | [diff] [blame] | 4514 | struct nfs4_client_reclaim *crp; |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 4515 | |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 4516 | crp = nfsd4_find_reclaim_client(name, nn); |
Jeff Layton | 0ce0c2b | 2012-11-12 15:00:55 -0500 | [diff] [blame] | 4517 | return (crp && crp->cr_clp); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 4518 | } |
| 4519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4520 | /* |
| 4521 | * failure => all reset bets are off, nfserr_no_grace... |
| 4522 | */ |
Jeff Layton | 772a9bb | 2012-11-12 15:00:54 -0500 | [diff] [blame] | 4523 | struct nfs4_client_reclaim * |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 4524 | nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4525 | { |
| 4526 | unsigned int strhashval; |
Jeff Layton | 772a9bb | 2012-11-12 15:00:54 -0500 | [diff] [blame] | 4527 | struct nfs4_client_reclaim *crp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4528 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 4529 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
| 4530 | crp = alloc_reclaim(); |
Jeff Layton | 772a9bb | 2012-11-12 15:00:54 -0500 | [diff] [blame] | 4531 | if (crp) { |
| 4532 | strhashval = clientstr_hashval(name); |
| 4533 | INIT_LIST_HEAD(&crp->cr_strhash); |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 4534 | list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); |
Jeff Layton | 772a9bb | 2012-11-12 15:00:54 -0500 | [diff] [blame] | 4535 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
Jeff Layton | 0ce0c2b | 2012-11-12 15:00:55 -0500 | [diff] [blame] | 4536 | crp->cr_clp = NULL; |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 4537 | nn->reclaim_str_hashtbl_size++; |
Jeff Layton | 772a9bb | 2012-11-12 15:00:54 -0500 | [diff] [blame] | 4538 | } |
| 4539 | return crp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4540 | } |
| 4541 | |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 4542 | void |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 4543 | 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] | 4544 | { |
| 4545 | list_del(&crp->cr_strhash); |
| 4546 | kfree(crp); |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 4547 | nn->reclaim_str_hashtbl_size--; |
Jeff Layton | ce30e53 | 2012-11-12 15:00:53 -0500 | [diff] [blame] | 4548 | } |
| 4549 | |
| 4550 | void |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 4551 | nfs4_release_reclaim(struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4552 | { |
| 4553 | struct nfs4_client_reclaim *crp = NULL; |
| 4554 | int i; |
| 4555 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4556 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 4557 | while (!list_empty(&nn->reclaim_str_hashtbl[i])) { |
| 4558 | crp = list_entry(nn->reclaim_str_hashtbl[i].next, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4559 | struct nfs4_client_reclaim, cr_strhash); |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 4560 | nfs4_remove_reclaim_record(crp, nn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4561 | } |
| 4562 | } |
J. Bruce Fields | 063b0fb | 2012-11-25 14:48:10 -0500 | [diff] [blame] | 4563 | WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4564 | } |
| 4565 | |
| 4566 | /* |
| 4567 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 4568 | struct nfs4_client_reclaim * |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 4569 | nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4570 | { |
| 4571 | unsigned int strhashval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4572 | struct nfs4_client_reclaim *crp = NULL; |
| 4573 | |
Jeff Layton | 278c931 | 2012-11-12 15:00:52 -0500 | [diff] [blame] | 4574 | dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4575 | |
Jeff Layton | 278c931 | 2012-11-12 15:00:52 -0500 | [diff] [blame] | 4576 | strhashval = clientstr_hashval(recdir); |
Stanislav Kinsbursky | 52e19c0 | 2012-11-14 18:21:16 +0300 | [diff] [blame] | 4577 | list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { |
Jeff Layton | 278c931 | 2012-11-12 15:00:52 -0500 | [diff] [blame] | 4578 | if (same_name(crp->cr_recdir, recdir)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4579 | return crp; |
| 4580 | } |
| 4581 | } |
| 4582 | return NULL; |
| 4583 | } |
| 4584 | |
| 4585 | /* |
| 4586 | * Called from OPEN. Look for clientid in reclaim list. |
| 4587 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4588 | __be32 |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 4589 | nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4590 | { |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 4591 | struct nfs4_client *clp; |
| 4592 | |
| 4593 | /* find clientid in conf_id_hashtbl */ |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 4594 | clp = find_confirmed_client(clid, sessions, nn); |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 4595 | if (clp == NULL) |
| 4596 | return nfserr_reclaim_bad; |
| 4597 | |
| 4598 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4599 | } |
| 4600 | |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4601 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
| 4602 | |
Bryan Schumaker | 44e34da60 | 2012-11-29 11:40:39 -0500 | [diff] [blame] | 4603 | u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) |
| 4604 | { |
| 4605 | expire_client(clp); |
| 4606 | return 1; |
| 4607 | } |
| 4608 | |
Bryan Schumaker | 184c184 | 2012-11-29 11:40:44 -0500 | [diff] [blame] | 4609 | u64 nfsd_print_client(struct nfs4_client *clp, u64 num) |
| 4610 | { |
| 4611 | char buf[INET6_ADDRSTRLEN]; |
Bryan Schumaker | 0a5c33e | 2012-12-07 16:17:28 -0500 | [diff] [blame] | 4612 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
Bryan Schumaker | 184c184 | 2012-11-29 11:40:44 -0500 | [diff] [blame] | 4613 | printk(KERN_INFO "NFS Client: %s\n", buf); |
| 4614 | return 1; |
| 4615 | } |
| 4616 | |
| 4617 | static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, |
| 4618 | const char *type) |
| 4619 | { |
| 4620 | char buf[INET6_ADDRSTRLEN]; |
Bryan Schumaker | 0a5c33e | 2012-12-07 16:17:28 -0500 | [diff] [blame] | 4621 | rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); |
Bryan Schumaker | 184c184 | 2012-11-29 11:40:44 -0500 | [diff] [blame] | 4622 | printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); |
| 4623 | } |
| 4624 | |
Bryan Schumaker | fc29171 | 2012-11-29 11:40:40 -0500 | [diff] [blame] | 4625 | static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) |
| 4626 | { |
| 4627 | struct nfs4_openowner *oop; |
| 4628 | struct nfs4_lockowner *lop, *lo_next; |
| 4629 | struct nfs4_ol_stateid *stp, *st_next; |
| 4630 | u64 count = 0; |
| 4631 | |
| 4632 | list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { |
| 4633 | list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { |
| 4634 | list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) { |
| 4635 | if (func) |
| 4636 | func(lop); |
| 4637 | if (++count == max) |
| 4638 | return count; |
| 4639 | } |
| 4640 | } |
| 4641 | } |
| 4642 | |
| 4643 | return count; |
| 4644 | } |
| 4645 | |
| 4646 | u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) |
| 4647 | { |
| 4648 | return nfsd_foreach_client_lock(clp, max, release_lockowner); |
| 4649 | } |
| 4650 | |
Bryan Schumaker | 184c184 | 2012-11-29 11:40:44 -0500 | [diff] [blame] | 4651 | u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) |
| 4652 | { |
| 4653 | u64 count = nfsd_foreach_client_lock(clp, max, NULL); |
| 4654 | nfsd_print_count(clp, count, "locked files"); |
| 4655 | return count; |
| 4656 | } |
| 4657 | |
Bryan Schumaker | 4dbdbda | 2012-11-29 11:40:41 -0500 | [diff] [blame] | 4658 | static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) |
| 4659 | { |
| 4660 | struct nfs4_openowner *oop, *next; |
| 4661 | u64 count = 0; |
| 4662 | |
| 4663 | list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { |
| 4664 | if (func) |
| 4665 | func(oop); |
| 4666 | if (++count == max) |
| 4667 | break; |
| 4668 | } |
| 4669 | |
| 4670 | return count; |
| 4671 | } |
| 4672 | |
| 4673 | u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) |
| 4674 | { |
| 4675 | return nfsd_foreach_client_open(clp, max, release_openowner); |
| 4676 | } |
| 4677 | |
Bryan Schumaker | 184c184 | 2012-11-29 11:40:44 -0500 | [diff] [blame] | 4678 | u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) |
| 4679 | { |
| 4680 | u64 count = nfsd_foreach_client_open(clp, max, NULL); |
| 4681 | nfsd_print_count(clp, count, "open files"); |
| 4682 | return count; |
| 4683 | } |
| 4684 | |
Bryan Schumaker | 269de30 | 2012-11-29 11:40:42 -0500 | [diff] [blame] | 4685 | static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, |
| 4686 | struct list_head *victims) |
| 4687 | { |
| 4688 | struct nfs4_delegation *dp, *next; |
| 4689 | u64 count = 0; |
| 4690 | |
| 4691 | list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { |
| 4692 | if (victims) |
| 4693 | list_move(&dp->dl_recall_lru, victims); |
| 4694 | if (++count == max) |
| 4695 | break; |
| 4696 | } |
| 4697 | return count; |
| 4698 | } |
| 4699 | |
| 4700 | u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) |
| 4701 | { |
| 4702 | struct nfs4_delegation *dp, *next; |
| 4703 | LIST_HEAD(victims); |
| 4704 | u64 count; |
| 4705 | |
| 4706 | spin_lock(&recall_lock); |
| 4707 | count = nfsd_find_all_delegations(clp, max, &victims); |
| 4708 | spin_unlock(&recall_lock); |
| 4709 | |
| 4710 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) |
| 4711 | unhash_delegation(dp); |
| 4712 | |
| 4713 | return count; |
| 4714 | } |
| 4715 | |
| 4716 | u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) |
| 4717 | { |
| 4718 | struct nfs4_delegation *dp, *next; |
| 4719 | LIST_HEAD(victims); |
| 4720 | u64 count; |
| 4721 | |
| 4722 | spin_lock(&recall_lock); |
| 4723 | count = nfsd_find_all_delegations(clp, max, &victims); |
| 4724 | list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) |
| 4725 | nfsd_break_one_deleg(dp); |
| 4726 | spin_unlock(&recall_lock); |
| 4727 | |
| 4728 | return count; |
| 4729 | } |
| 4730 | |
Bryan Schumaker | 184c184 | 2012-11-29 11:40:44 -0500 | [diff] [blame] | 4731 | u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) |
| 4732 | { |
| 4733 | u64 count = 0; |
| 4734 | |
| 4735 | spin_lock(&recall_lock); |
| 4736 | count = nfsd_find_all_delegations(clp, max, NULL); |
| 4737 | spin_unlock(&recall_lock); |
| 4738 | |
| 4739 | nfsd_print_count(clp, count, "delegations"); |
| 4740 | return count; |
| 4741 | } |
| 4742 | |
Bryan Schumaker | 44e34da60 | 2012-11-29 11:40:39 -0500 | [diff] [blame] | 4743 | u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4744 | { |
| 4745 | struct nfs4_client *clp, *next; |
Bryan Schumaker | 44e34da60 | 2012-11-29 11:40:39 -0500 | [diff] [blame] | 4746 | u64 count = 0; |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 4747 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4748 | |
Bryan Schumaker | 44e34da60 | 2012-11-29 11:40:39 -0500 | [diff] [blame] | 4749 | if (!nfsd_netns_ready(nn)) |
| 4750 | return 0; |
| 4751 | |
Stanislav Kinsbursky | 5ed58bb | 2012-11-14 18:21:56 +0300 | [diff] [blame] | 4752 | list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { |
Bryan Schumaker | 44e34da60 | 2012-11-29 11:40:39 -0500 | [diff] [blame] | 4753 | count += func(clp, max - count); |
| 4754 | if ((max != 0) && (count >= max)) |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4755 | break; |
| 4756 | } |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4757 | |
Bryan Schumaker | 44e34da60 | 2012-11-29 11:40:39 -0500 | [diff] [blame] | 4758 | return count; |
| 4759 | } |
| 4760 | |
Bryan Schumaker | 6c1e82a | 2012-11-29 11:40:46 -0500 | [diff] [blame] | 4761 | struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) |
| 4762 | { |
| 4763 | struct nfs4_client *clp; |
| 4764 | struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); |
| 4765 | |
| 4766 | if (!nfsd_netns_ready(nn)) |
| 4767 | return NULL; |
| 4768 | |
| 4769 | list_for_each_entry(clp, &nn->client_lru, cl_lru) { |
| 4770 | if (memcmp(&clp->cl_addr, addr, addr_size) == 0) |
| 4771 | return clp; |
| 4772 | } |
| 4773 | return NULL; |
| 4774 | } |
| 4775 | |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4776 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
| 4777 | |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4778 | /* initialization to perform at module load time: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4779 | |
Bryan Schumaker | 7208339 | 2011-11-01 15:24:59 -0400 | [diff] [blame] | 4780 | void |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4781 | nfs4_state_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4782 | { |
Bryan Schumaker | 7208339 | 2011-11-01 15:24:59 -0400 | [diff] [blame] | 4783 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4784 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4785 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
| 4786 | INIT_LIST_HEAD(&file_hashtbl[i]); |
| 4787 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4788 | INIT_LIST_HEAD(&del_recall_lru); |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4789 | } |
| 4790 | |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 4791 | /* |
| 4792 | * Since the lifetime of a delegation isn't limited to that of an open, a |
| 4793 | * client may quite reasonably hang on to a delegation as long as it has |
| 4794 | * the inode cached. This becomes an obvious problem the first time a |
| 4795 | * client's inode cache approaches the size of the server's total memory. |
| 4796 | * |
| 4797 | * For now we avoid this problem by imposing a hard limit on the number |
| 4798 | * of delegations, which varies according to the server's memory size. |
| 4799 | */ |
| 4800 | static void |
| 4801 | set_max_delegations(void) |
| 4802 | { |
| 4803 | /* |
| 4804 | * Allow at most 4 delegations per megabyte of RAM. Quick |
| 4805 | * estimates suggest that in the worst case (where every delegation |
| 4806 | * is for a different inode), a delegation could take about 1.5K, |
| 4807 | * giving a worst case usage of about 6% of memory. |
| 4808 | */ |
| 4809 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); |
| 4810 | } |
| 4811 | |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 4812 | static int nfs4_state_create_net(struct net *net) |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 4813 | { |
| 4814 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
| 4815 | int i; |
| 4816 | |
| 4817 | nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
| 4818 | CLIENT_HASH_SIZE, GFP_KERNEL); |
| 4819 | if (!nn->conf_id_hashtbl) |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 4820 | goto err; |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 4821 | nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * |
| 4822 | CLIENT_HASH_SIZE, GFP_KERNEL); |
| 4823 | if (!nn->unconf_id_hashtbl) |
| 4824 | goto err_unconf_id; |
Stanislav Kinsbursky | 9b53113 | 2012-11-14 18:21:41 +0300 | [diff] [blame] | 4825 | nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * |
| 4826 | OWNER_HASH_SIZE, GFP_KERNEL); |
| 4827 | if (!nn->ownerstr_hashtbl) |
| 4828 | goto err_ownerstr; |
Stanislav Kinsbursky | 20e9e2b | 2012-11-14 18:21:46 +0300 | [diff] [blame] | 4829 | nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * |
| 4830 | LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); |
| 4831 | if (!nn->lockowner_ino_hashtbl) |
| 4832 | goto err_lockowner_ino; |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 4833 | nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * |
| 4834 | SESSION_HASH_SIZE, GFP_KERNEL); |
| 4835 | if (!nn->sessionid_hashtbl) |
| 4836 | goto err_sessionid; |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 4837 | |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 4838 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 4839 | INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 4840 | INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 4841 | } |
Stanislav Kinsbursky | 9b53113 | 2012-11-14 18:21:41 +0300 | [diff] [blame] | 4842 | for (i = 0; i < OWNER_HASH_SIZE; i++) |
| 4843 | INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); |
Stanislav Kinsbursky | 20e9e2b | 2012-11-14 18:21:46 +0300 | [diff] [blame] | 4844 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
| 4845 | INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 4846 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
| 4847 | INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 4848 | nn->conf_name_tree = RB_ROOT; |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 4849 | nn->unconf_name_tree = RB_ROOT; |
Stanislav Kinsbursky | 5ed58bb | 2012-11-14 18:21:56 +0300 | [diff] [blame] | 4850 | INIT_LIST_HEAD(&nn->client_lru); |
Stanislav Kinsbursky | 73758fed | 2012-11-14 18:22:01 +0300 | [diff] [blame] | 4851 | INIT_LIST_HEAD(&nn->close_lru); |
Stanislav Kinsbursky | c9a4962 | 2012-11-26 15:21:58 +0300 | [diff] [blame] | 4852 | spin_lock_init(&nn->client_lock); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 4853 | |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 4854 | INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 4855 | get_net(net); |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 4856 | |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 4857 | return 0; |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 4858 | |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 4859 | err_sessionid: |
| 4860 | kfree(nn->lockowner_ino_hashtbl); |
Stanislav Kinsbursky | 20e9e2b | 2012-11-14 18:21:46 +0300 | [diff] [blame] | 4861 | err_lockowner_ino: |
| 4862 | kfree(nn->ownerstr_hashtbl); |
Stanislav Kinsbursky | 9b53113 | 2012-11-14 18:21:41 +0300 | [diff] [blame] | 4863 | err_ownerstr: |
| 4864 | kfree(nn->unconf_id_hashtbl); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 4865 | err_unconf_id: |
| 4866 | kfree(nn->conf_id_hashtbl); |
Stanislav Kinsbursky | 382a62e | 2012-11-14 18:21:26 +0300 | [diff] [blame] | 4867 | err: |
| 4868 | return -ENOMEM; |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 4869 | } |
| 4870 | |
| 4871 | static void |
Stanislav Kinsbursky | 4dce0ac | 2012-11-26 15:22:08 +0300 | [diff] [blame] | 4872 | nfs4_state_destroy_net(struct net *net) |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 4873 | { |
| 4874 | int i; |
| 4875 | struct nfs4_client *clp = NULL; |
| 4876 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 4877 | struct rb_node *node, *tmp; |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 4878 | |
| 4879 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 4880 | while (!list_empty(&nn->conf_id_hashtbl[i])) { |
| 4881 | clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); |
| 4882 | destroy_client(clp); |
| 4883 | } |
| 4884 | } |
Stanislav Kinsbursky | a99454a | 2012-11-14 18:21:36 +0300 | [diff] [blame] | 4885 | |
| 4886 | node = rb_first(&nn->unconf_name_tree); |
| 4887 | while (node != NULL) { |
| 4888 | tmp = node; |
| 4889 | node = rb_next(tmp); |
| 4890 | clp = rb_entry(tmp, struct nfs4_client, cl_namenode); |
| 4891 | rb_erase(tmp, &nn->unconf_name_tree); |
| 4892 | destroy_client(clp); |
| 4893 | } |
| 4894 | |
Stanislav Kinsbursky | 1872de0 | 2012-11-14 18:21:51 +0300 | [diff] [blame] | 4895 | kfree(nn->sessionid_hashtbl); |
Stanislav Kinsbursky | 20e9e2b | 2012-11-14 18:21:46 +0300 | [diff] [blame] | 4896 | kfree(nn->lockowner_ino_hashtbl); |
Stanislav Kinsbursky | 9b53113 | 2012-11-14 18:21:41 +0300 | [diff] [blame] | 4897 | kfree(nn->ownerstr_hashtbl); |
Stanislav Kinsbursky | 0a7ec37 | 2012-11-14 18:21:31 +0300 | [diff] [blame] | 4898 | kfree(nn->unconf_id_hashtbl); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 4899 | kfree(nn->conf_id_hashtbl); |
Stanislav Kinsbursky | 4dce0ac | 2012-11-26 15:22:08 +0300 | [diff] [blame] | 4900 | put_net(net); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 4901 | } |
| 4902 | |
Stanislav Kinsbursky | f252bc6 | 2012-11-26 15:22:18 +0300 | [diff] [blame] | 4903 | int |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 4904 | nfs4_state_start_net(struct net *net) |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4905 | { |
Stanislav Kinsbursky | 5e1533c | 2012-07-25 16:56:58 +0400 | [diff] [blame] | 4906 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4907 | int ret; |
| 4908 | |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 4909 | ret = nfs4_state_create_net(net); |
Stanislav Kinsbursky | 8daae4d | 2012-11-14 18:21:21 +0300 | [diff] [blame] | 4910 | if (ret) |
| 4911 | return ret; |
Stanislav Kinsbursky | 5e1533c | 2012-07-25 16:56:58 +0400 | [diff] [blame] | 4912 | nfsd4_client_tracking_init(net); |
Stanislav Kinsbursky | 2c142ba | 2012-07-25 16:57:45 +0400 | [diff] [blame] | 4913 | nn->boot_time = get_seconds(); |
Stanislav Kinsbursky | 5ccb006 | 2012-07-25 16:57:22 +0400 | [diff] [blame] | 4914 | locks_start_grace(net, &nn->nfsd4_manager); |
Stanislav Kinsbursky | a51c84e | 2012-07-25 16:57:37 +0400 | [diff] [blame] | 4915 | nn->grace_ended = false; |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 4916 | printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", |
Stanislav Kinsbursky | 5284b44 | 2012-11-27 14:11:49 +0300 | [diff] [blame] | 4917 | nn->nfsd4_grace, net); |
| 4918 | queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 4919 | return 0; |
| 4920 | } |
| 4921 | |
| 4922 | /* initialization to perform when the nfsd service is started: */ |
| 4923 | |
| 4924 | int |
| 4925 | nfs4_state_start(void) |
| 4926 | { |
| 4927 | int ret; |
| 4928 | |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4929 | ret = set_callback_cred(); |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 4930 | if (ret) |
| 4931 | return -ENOMEM; |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 4932 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
Jeff Layton | a6d6b78 | 2012-03-05 11:42:36 -0500 | [diff] [blame] | 4933 | if (laundry_wq == NULL) { |
| 4934 | ret = -ENOMEM; |
| 4935 | goto out_recovery; |
| 4936 | } |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4937 | ret = nfsd4_create_callback_queue(); |
| 4938 | if (ret) |
| 4939 | goto out_free_laundry; |
Stanislav Kinsbursky | 0912128 | 2012-11-14 18:22:17 +0300 | [diff] [blame] | 4940 | |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 4941 | set_max_delegations(); |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 4942 | |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4943 | return 0; |
Stanislav Kinsbursky | d85ed44 | 2012-11-26 15:22:13 +0300 | [diff] [blame] | 4944 | |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4945 | out_free_laundry: |
| 4946 | destroy_workqueue(laundry_wq); |
Jeff Layton | a6d6b78 | 2012-03-05 11:42:36 -0500 | [diff] [blame] | 4947 | out_recovery: |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4948 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4949 | } |
| 4950 | |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 4951 | /* should be called with the state lock held */ |
Stanislav Kinsbursky | f252bc6 | 2012-11-26 15:22:18 +0300 | [diff] [blame] | 4952 | void |
Stanislav Kinsbursky | 4dce0ac | 2012-11-26 15:22:08 +0300 | [diff] [blame] | 4953 | nfs4_state_shutdown_net(struct net *net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4954 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4955 | struct nfs4_delegation *dp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4956 | struct list_head *pos, *next, reaplist; |
Stanislav Kinsbursky | 4dce0ac | 2012-11-26 15:22:08 +0300 | [diff] [blame] | 4957 | struct nfsd_net *nn = net_generic(net, nfsd_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4958 | |
Stanislav Kinsbursky | 4dce0ac | 2012-11-26 15:22:08 +0300 | [diff] [blame] | 4959 | cancel_delayed_work_sync(&nn->laundromat_work); |
| 4960 | locks_end_grace(&nn->nfsd4_manager); |
Jeff Layton | ac55fdc | 2012-11-12 15:00:56 -0500 | [diff] [blame] | 4961 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4962 | INIT_LIST_HEAD(&reaplist); |
| 4963 | spin_lock(&recall_lock); |
| 4964 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 4965 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
Stanislav Kinsbursky | 4e37a7c2 | 2012-11-26 15:22:03 +0300 | [diff] [blame] | 4966 | if (dp->dl_stid.sc_client->net != net) |
| 4967 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4968 | list_move(&dp->dl_recall_lru, &reaplist); |
| 4969 | } |
| 4970 | spin_unlock(&recall_lock); |
| 4971 | list_for_each_safe(pos, next, &reaplist) { |
| 4972 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4973 | unhash_delegation(dp); |
| 4974 | } |
| 4975 | |
Stanislav Kinsbursky | 3320fef19 | 2012-11-14 18:22:07 +0300 | [diff] [blame] | 4976 | nfsd4_client_tracking_exit(net); |
Stanislav Kinsbursky | 4dce0ac | 2012-11-26 15:22:08 +0300 | [diff] [blame] | 4977 | nfs4_state_destroy_net(net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4978 | } |
| 4979 | |
| 4980 | void |
| 4981 | nfs4_state_shutdown(void) |
| 4982 | { |
NeilBrown | 5e8d5c2 | 2006-04-10 22:55:37 -0700 | [diff] [blame] | 4983 | destroy_workqueue(laundry_wq); |
J. Bruce Fields | c3935e3 | 2010-06-04 16:42:08 -0400 | [diff] [blame] | 4984 | nfsd4_destroy_callback_queue(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4985 | } |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 4986 | |
| 4987 | static void |
| 4988 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) |
| 4989 | { |
Tigran Mkrtchyan | 37c593c | 2012-02-13 22:55:32 +0100 | [diff] [blame] | 4990 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
| 4991 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 4992 | } |
| 4993 | |
| 4994 | static void |
| 4995 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) |
| 4996 | { |
Tigran Mkrtchyan | 37c593c | 2012-02-13 22:55:32 +0100 | [diff] [blame] | 4997 | if (cstate->minorversion) { |
| 4998 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); |
| 4999 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); |
| 5000 | } |
| 5001 | } |
| 5002 | |
| 5003 | void |
| 5004 | clear_current_stateid(struct nfsd4_compound_state *cstate) |
| 5005 | { |
| 5006 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 5007 | } |
| 5008 | |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 5009 | /* |
| 5010 | * functions to set current state id |
| 5011 | */ |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 5012 | void |
Tigran Mkrtchyan | 9428fe1 | 2012-02-13 22:55:31 +0100 | [diff] [blame] | 5013 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) |
| 5014 | { |
| 5015 | put_stateid(cstate, &odp->od_stateid); |
| 5016 | } |
| 5017 | |
| 5018 | void |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 5019 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) |
| 5020 | { |
| 5021 | put_stateid(cstate, &open->op_stateid); |
| 5022 | } |
| 5023 | |
| 5024 | void |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 5025 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) |
| 5026 | { |
| 5027 | put_stateid(cstate, &close->cl_stateid); |
| 5028 | } |
| 5029 | |
| 5030 | void |
| 5031 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) |
| 5032 | { |
| 5033 | put_stateid(cstate, &lock->lk_resp_stateid); |
| 5034 | } |
| 5035 | |
| 5036 | /* |
| 5037 | * functions to consume current state id |
| 5038 | */ |
Tigran Mkrtchyan | 1e97b51 | 2012-02-13 22:55:30 +0100 | [diff] [blame] | 5039 | |
| 5040 | void |
Tigran Mkrtchyan | 9428fe1 | 2012-02-13 22:55:31 +0100 | [diff] [blame] | 5041 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) |
| 5042 | { |
| 5043 | get_stateid(cstate, &odp->od_stateid); |
| 5044 | } |
| 5045 | |
| 5046 | void |
| 5047 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) |
| 5048 | { |
| 5049 | get_stateid(cstate, &drp->dr_stateid); |
| 5050 | } |
| 5051 | |
| 5052 | void |
Tigran Mkrtchyan | 1e97b51 | 2012-02-13 22:55:30 +0100 | [diff] [blame] | 5053 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) |
| 5054 | { |
| 5055 | get_stateid(cstate, &fsp->fr_stateid); |
| 5056 | } |
| 5057 | |
| 5058 | void |
| 5059 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) |
| 5060 | { |
| 5061 | get_stateid(cstate, &setattr->sa_stateid); |
| 5062 | } |
| 5063 | |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 5064 | void |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 5065 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) |
| 5066 | { |
| 5067 | get_stateid(cstate, &close->cl_stateid); |
| 5068 | } |
| 5069 | |
| 5070 | void |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 5071 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 5072 | { |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 5073 | get_stateid(cstate, &locku->lu_stateid); |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 5074 | } |
Tigran Mkrtchyan | 30813e2 | 2012-02-13 22:55:26 +0100 | [diff] [blame] | 5075 | |
| 5076 | void |
| 5077 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) |
| 5078 | { |
| 5079 | get_stateid(cstate, &read->rd_stateid); |
| 5080 | } |
| 5081 | |
| 5082 | void |
| 5083 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) |
| 5084 | { |
| 5085 | get_stateid(cstate, &write->wr_stateid); |
| 5086 | } |