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> |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 41 | #include <linux/sunrpc/svcauth_gss.h> |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 42 | #include <linux/sunrpc/clnt.h> |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 43 | #include "xdr4.h" |
J. Bruce Fields | 0a3adad | 2009-11-04 18:12:35 -0500 | [diff] [blame] | 44 | #include "vfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
| 47 | |
| 48 | /* Globals */ |
J. Bruce Fields | cf07d2e | 2010-02-28 23:20:19 -0500 | [diff] [blame] | 49 | time_t nfsd4_lease = 90; /* default lease time */ |
J. Bruce Fields | efc4bb4 | 2010-03-02 11:04:06 -0500 | [diff] [blame] | 50 | time_t nfsd4_grace = 90; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 51 | static time_t boot_time; |
J. Bruce Fields | f32f3c2 | 2011-12-12 15:00:35 -0500 | [diff] [blame] | 52 | |
| 53 | #define all_ones {{~0,~0},~0} |
| 54 | static const stateid_t one_stateid = { |
| 55 | .si_generation = ~0, |
| 56 | .si_opaque = all_ones, |
| 57 | }; |
| 58 | static const stateid_t zero_stateid = { |
| 59 | /* all fields zero */ |
| 60 | }; |
Tigran Mkrtchyan | 19ff0f2 | 2012-02-13 22:55:23 +0100 | [diff] [blame] | 61 | static const stateid_t currentstateid = { |
| 62 | .si_generation = 1, |
| 63 | }; |
J. Bruce Fields | f32f3c2 | 2011-12-12 15:00:35 -0500 | [diff] [blame] | 64 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 65 | static u64 current_sessionid = 1; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 66 | |
J. Bruce Fields | f32f3c2 | 2011-12-12 15:00:35 -0500 | [diff] [blame] | 67 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) |
| 68 | #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) |
Tigran Mkrtchyan | 19ff0f2 | 2012-02-13 22:55:23 +0100 | [diff] [blame] | 69 | #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | /* forward declarations */ |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 72 | 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] | 73 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 74 | /* Locking: */ |
| 75 | |
| 76 | /* Currently used for almost all code touching nfsv4 state: */ |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 77 | static DEFINE_MUTEX(client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 79 | /* |
| 80 | * Currently used for the del_recall_lru and file hash table. In an |
| 81 | * effort to decrease the scope of the client_mutex, this spinlock may |
| 82 | * eventually cover more: |
| 83 | */ |
| 84 | static DEFINE_SPINLOCK(recall_lock); |
| 85 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 86 | static struct kmem_cache *openowner_slab = NULL; |
| 87 | static struct kmem_cache *lockowner_slab = NULL; |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 88 | static struct kmem_cache *file_slab = NULL; |
| 89 | static struct kmem_cache *stateid_slab = NULL; |
| 90 | static struct kmem_cache *deleg_slab = NULL; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 91 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | void |
| 93 | nfs4_lock_state(void) |
| 94 | { |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 95 | mutex_lock(&client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } |
| 97 | |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 98 | static void free_session(struct kref *); |
| 99 | |
| 100 | /* Must be called under the client_lock */ |
| 101 | static void nfsd4_put_session_locked(struct nfsd4_session *ses) |
| 102 | { |
| 103 | kref_put(&ses->se_ref, free_session); |
| 104 | } |
| 105 | |
| 106 | static void nfsd4_get_session(struct nfsd4_session *ses) |
| 107 | { |
| 108 | kref_get(&ses->se_ref); |
| 109 | } |
| 110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | void |
| 112 | nfs4_unlock_state(void) |
| 113 | { |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 114 | mutex_unlock(&client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | static inline u32 |
| 118 | opaque_hashval(const void *ptr, int nbytes) |
| 119 | { |
| 120 | unsigned char *cptr = (unsigned char *) ptr; |
| 121 | |
| 122 | u32 x = 0; |
| 123 | while (nbytes--) { |
| 124 | x *= 37; |
| 125 | x += *cptr++; |
| 126 | } |
| 127 | return x; |
| 128 | } |
| 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | static struct list_head del_recall_lru; |
| 131 | |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 132 | static void nfsd4_free_file(struct nfs4_file *f) |
| 133 | { |
| 134 | kmem_cache_free(file_slab, f); |
| 135 | } |
| 136 | |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 137 | static inline void |
| 138 | put_nfs4_file(struct nfs4_file *fi) |
| 139 | { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 140 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
| 141 | list_del(&fi->fi_hash); |
| 142 | spin_unlock(&recall_lock); |
| 143 | iput(fi->fi_inode); |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 144 | nfsd4_free_file(fi); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 145 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | static inline void |
| 149 | get_nfs4_file(struct nfs4_file *fi) |
| 150 | { |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 151 | atomic_inc(&fi->fi_ref); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 152 | } |
| 153 | |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 154 | static int num_delegations; |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 155 | unsigned int max_delegations; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 156 | |
| 157 | /* |
| 158 | * Open owner state (share locks) |
| 159 | */ |
| 160 | |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 161 | /* hash tables for lock and open owners */ |
| 162 | #define OWNER_HASH_BITS 8 |
| 163 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) |
| 164 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 165 | |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 166 | static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
J. Bruce Fields | ddc04c4 | 2011-07-30 23:46:29 -0400 | [diff] [blame] | 167 | { |
| 168 | unsigned int ret; |
| 169 | |
| 170 | ret = opaque_hashval(ownername->data, ownername->len); |
| 171 | ret += clientid; |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 172 | return ret & OWNER_HASH_MASK; |
J. Bruce Fields | ddc04c4 | 2011-07-30 23:46:29 -0400 | [diff] [blame] | 173 | } |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 174 | |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 175 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 176 | |
| 177 | /* hash table for nfs4_file */ |
| 178 | #define FILE_HASH_BITS 8 |
| 179 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) |
Shan Wei | 3507958 | 2011-01-14 17:35:59 +0800 | [diff] [blame] | 180 | |
J. Bruce Fields | ddc04c4 | 2011-07-30 23:46:29 -0400 | [diff] [blame] | 181 | static unsigned int file_hashval(struct inode *ino) |
| 182 | { |
| 183 | /* XXX: why are we hashing on inode pointer, anyway? */ |
| 184 | return hash_ptr(ino, FILE_HASH_BITS); |
| 185 | } |
| 186 | |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 187 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 188 | |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 189 | 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] | 190 | { |
| 191 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); |
| 192 | atomic_inc(&fp->fi_access[oflag]); |
| 193 | } |
| 194 | |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 195 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
| 196 | { |
| 197 | if (oflag == O_RDWR) { |
| 198 | __nfs4_file_get_access(fp, O_RDONLY); |
| 199 | __nfs4_file_get_access(fp, O_WRONLY); |
| 200 | } else |
| 201 | __nfs4_file_get_access(fp, oflag); |
| 202 | } |
| 203 | |
| 204 | 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] | 205 | { |
| 206 | if (fp->fi_fds[oflag]) { |
| 207 | fput(fp->fi_fds[oflag]); |
| 208 | fp->fi_fds[oflag] = NULL; |
| 209 | } |
| 210 | } |
| 211 | |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 212 | 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] | 213 | { |
| 214 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 215 | nfs4_file_put_fd(fp, oflag); |
J. Bruce Fields | e0e8aad | 2013-03-28 20:37:14 -0400 | [diff] [blame] | 216 | if (atomic_read(&fp->fi_access[1 - oflag]) == 0) |
J. Bruce Fields | 3d02fa2 | 2011-09-19 15:07:41 -0400 | [diff] [blame] | 217 | nfs4_file_put_fd(fp, O_RDWR); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 218 | } |
| 219 | } |
| 220 | |
J. Bruce Fields | 998db52 | 2010-08-07 09:21:41 -0400 | [diff] [blame] | 221 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
| 222 | { |
| 223 | if (oflag == O_RDWR) { |
| 224 | __nfs4_file_put_access(fp, O_RDONLY); |
| 225 | __nfs4_file_put_access(fp, O_WRONLY); |
| 226 | } else |
| 227 | __nfs4_file_put_access(fp, oflag); |
| 228 | } |
| 229 | |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 230 | static inline int get_new_stid(struct nfs4_stid *stid) |
J. Bruce Fields | 36d44c6 | 2011-09-08 12:16:03 -0400 | [diff] [blame] | 231 | { |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 232 | static int min_stateid = 0; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 233 | struct idr *stateids = &stid->sc_client->cl_stateids; |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 234 | int new_stid; |
| 235 | int error; |
J. Bruce Fields | 36d44c6 | 2011-09-08 12:16:03 -0400 | [diff] [blame] | 236 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 237 | error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 238 | /* |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 239 | * Note: the necessary preallocation was done in |
| 240 | * nfs4_alloc_stateid(). The idr code caps the number of |
| 241 | * preallocations that can exist at a time, but the state lock |
| 242 | * prevents anyone from using ours before we get here: |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 243 | */ |
| 244 | BUG_ON(error); |
| 245 | /* |
| 246 | * It shouldn't be a problem to reuse an opaque stateid value. |
| 247 | * I don't think it is for 4.1. But with 4.0 I worry that, for |
| 248 | * example, a stray write retransmission could be accepted by |
| 249 | * the server when it should have been rejected. Therefore, |
| 250 | * adopt a trick from the sctp code to attempt to maximize the |
| 251 | * amount of time until an id is reused, by ensuring they always |
| 252 | * "increase" (mod INT_MAX): |
| 253 | */ |
| 254 | |
| 255 | min_stateid = new_stid+1; |
| 256 | if (min_stateid == INT_MAX) |
| 257 | min_stateid = 0; |
| 258 | return new_stid; |
J. Bruce Fields | 36d44c6 | 2011-09-08 12:16:03 -0400 | [diff] [blame] | 259 | } |
| 260 | |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 261 | static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 262 | { |
| 263 | stateid_t *s = &stid->sc_stateid; |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 264 | int new_id; |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 265 | |
| 266 | stid->sc_type = type; |
| 267 | stid->sc_client = cl; |
| 268 | s->si_opaque.so_clid = cl->cl_clientid; |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 269 | new_id = get_new_stid(stid); |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 270 | s->si_opaque.so_id = (u32)new_id; |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 271 | /* Will be incremented before return to client: */ |
| 272 | s->si_generation = 0; |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) |
| 276 | { |
| 277 | struct idr *stateids = &cl->cl_stateids; |
| 278 | |
| 279 | if (!idr_pre_get(stateids, GFP_KERNEL)) |
| 280 | return NULL; |
| 281 | /* |
| 282 | * Note: if we fail here (or any time between now and the time |
| 283 | * we actually get the new idr), we won't need to undo the idr |
| 284 | * preallocation, since the idr code caps the number of |
| 285 | * preallocated entries. |
| 286 | */ |
| 287 | return kmem_cache_alloc(slab, GFP_KERNEL); |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 288 | } |
| 289 | |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 290 | static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) |
| 291 | { |
| 292 | return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); |
| 293 | } |
| 294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | static struct nfs4_delegation * |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 296 | 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] | 297 | { |
| 298 | struct nfs4_delegation *dp; |
| 299 | struct nfs4_file *fp = stp->st_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
| 301 | dprintk("NFSD alloc_init_deleg\n"); |
J. Bruce Fields | c3e4808 | 2010-07-28 10:08:57 -0400 | [diff] [blame] | 302 | /* |
| 303 | * Major work on the lease subsystem (for example, to support |
| 304 | * calbacks on stat) will be required before we can support |
| 305 | * write delegations properly. |
| 306 | */ |
| 307 | if (type != NFS4_OPEN_DELEGATE_READ) |
| 308 | return NULL; |
Meelap Shah | 47f9940 | 2007-07-17 04:04:40 -0700 | [diff] [blame] | 309 | if (fp->fi_had_conflict) |
| 310 | return NULL; |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 311 | if (num_delegations > max_delegations) |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 312 | return NULL; |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 313 | dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 314 | if (dp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | return dp; |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 316 | init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 317 | /* |
| 318 | * delegation seqid's are never incremented. The 4.1 special |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 319 | * meaning of seqid 0 isn't meaningful, really, but let's avoid |
| 320 | * 0 anyway just for consistency and use 1: |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 321 | */ |
| 322 | dp->dl_stid.sc_stateid.si_generation = 1; |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 323 | num_delegations++; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 324 | INIT_LIST_HEAD(&dp->dl_perfile); |
| 325 | INIT_LIST_HEAD(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 327 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | dp->dl_file = fp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | dp->dl_type = type; |
J. Bruce Fields | 6c02eaa | 2009-02-02 17:30:51 -0500 | [diff] [blame] | 330 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | dp->dl_time = 0; |
| 332 | atomic_set(&dp->dl_count, 1); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 333 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | return dp; |
| 335 | } |
| 336 | |
| 337 | void |
| 338 | nfs4_put_delegation(struct nfs4_delegation *dp) |
| 339 | { |
| 340 | if (atomic_dec_and_test(&dp->dl_count)) { |
| 341 | dprintk("NFSD: freeing dp %p\n",dp); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 342 | put_nfs4_file(dp->dl_file); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 343 | kmem_cache_free(deleg_slab, dp); |
NeilBrown | ef0f339 | 2006-04-10 22:55:41 -0700 | [diff] [blame] | 344 | num_delegations--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | } |
| 346 | } |
| 347 | |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 348 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | { |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 350 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
| 351 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); |
| 352 | fp->fi_lease = NULL; |
J. Bruce Fields | 4ee6362 | 2011-04-15 18:08:26 -0400 | [diff] [blame] | 353 | fput(fp->fi_deleg_file); |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 354 | fp->fi_deleg_file = NULL; |
| 355 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | } |
| 357 | |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 358 | static void unhash_stid(struct nfs4_stid *s) |
| 359 | { |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 360 | struct idr *stateids = &s->sc_client->cl_stateids; |
| 361 | |
| 362 | idr_remove(stateids, s->sc_stateid.si_opaque.so_id); |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 363 | } |
| 364 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | /* Called under the state lock. */ |
| 366 | static void |
| 367 | unhash_delegation(struct nfs4_delegation *dp) |
| 368 | { |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 369 | unhash_stid(&dp->dl_stid); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 370 | list_del_init(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | spin_lock(&recall_lock); |
J. Bruce Fields | 5d926e8 | 2011-02-07 16:53:46 -0500 | [diff] [blame] | 372 | list_del_init(&dp->dl_perfile); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | list_del_init(&dp->dl_recall_lru); |
| 374 | spin_unlock(&recall_lock); |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 375 | nfs4_put_deleg_lease(dp->dl_file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | nfs4_put_delegation(dp); |
| 377 | } |
| 378 | |
| 379 | /* |
| 380 | * SETCLIENTID state |
| 381 | */ |
| 382 | |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 383 | /* client_lock protects the client lru list and session hash table */ |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 384 | static DEFINE_SPINLOCK(client_lock); |
| 385 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | /* Hash tables for nfs4_clientid state */ |
| 387 | #define CLIENT_HASH_BITS 4 |
| 388 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) |
| 389 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) |
| 390 | |
J. Bruce Fields | ddc04c4 | 2011-07-30 23:46:29 -0400 | [diff] [blame] | 391 | static unsigned int clientid_hashval(u32 id) |
| 392 | { |
| 393 | return id & CLIENT_HASH_MASK; |
| 394 | } |
| 395 | |
| 396 | static unsigned int clientstr_hashval(const char *name) |
| 397 | { |
| 398 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; |
| 399 | } |
| 400 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | /* |
| 402 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot |
| 403 | * used in reboot/reset lease grace period processing |
| 404 | * |
| 405 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed |
| 406 | * setclientid_confirmed info. |
| 407 | * |
| 408 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed |
| 409 | * setclientid info. |
| 410 | * |
| 411 | * client_lru holds client queue ordered by nfs4_client.cl_time |
| 412 | * for lease renewal. |
| 413 | * |
| 414 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time |
| 415 | * for last close replay. |
| 416 | */ |
| 417 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; |
| 418 | static int reclaim_str_hashtbl_size = 0; |
| 419 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; |
| 420 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; |
| 421 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; |
| 422 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; |
| 423 | static struct list_head client_lru; |
| 424 | static struct list_head close_lru; |
| 425 | |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 426 | /* |
| 427 | * We store the NONE, READ, WRITE, and BOTH bits separately in the |
| 428 | * st_{access,deny}_bmap field of the stateid, in order to track not |
| 429 | * only what share bits are currently in force, but also what |
| 430 | * combinations of share bits previous opens have used. This allows us |
| 431 | * to enforce the recommendation of rfc 3530 14.2.19 that the server |
| 432 | * return an error if the client attempt to downgrade to a combination |
| 433 | * of share bits not explicable by closing some of its previous opens. |
| 434 | * |
| 435 | * XXX: This enforcement is actually incomplete, since we don't keep |
| 436 | * track of access/deny bit combinations; so, e.g., we allow: |
| 437 | * |
| 438 | * OPEN allow read, deny write |
| 439 | * OPEN allow both, deny none |
| 440 | * DOWNGRADE allow read, deny none |
| 441 | * |
| 442 | * which we should reject. |
| 443 | */ |
| 444 | static void |
| 445 | set_access(unsigned int *access, unsigned long bmap) { |
| 446 | int i; |
| 447 | |
| 448 | *access = 0; |
| 449 | for (i = 1; i < 4; i++) { |
| 450 | if (test_bit(i, &bmap)) |
| 451 | *access |= i; |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | static void |
| 456 | set_deny(unsigned int *deny, unsigned long bmap) { |
| 457 | int i; |
| 458 | |
| 459 | *deny = 0; |
| 460 | for (i = 0; i < 4; i++) { |
| 461 | if (test_bit(i, &bmap)) |
| 462 | *deny |= i ; |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | static int |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 467 | test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 468 | unsigned int access, deny; |
| 469 | |
| 470 | set_access(&access, stp->st_access_bmap); |
| 471 | set_deny(&deny, stp->st_deny_bmap); |
| 472 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
| 473 | return 0; |
| 474 | return 1; |
| 475 | } |
| 476 | |
| 477 | static int nfs4_access_to_omode(u32 access) |
| 478 | { |
J. Bruce Fields | 8f34a43 | 2010-09-02 15:23:16 -0400 | [diff] [blame] | 479 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 480 | case NFS4_SHARE_ACCESS_READ: |
| 481 | return O_RDONLY; |
| 482 | case NFS4_SHARE_ACCESS_WRITE: |
| 483 | return O_WRONLY; |
| 484 | case NFS4_SHARE_ACCESS_BOTH: |
| 485 | return O_RDWR; |
| 486 | } |
| 487 | BUG(); |
| 488 | } |
| 489 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 490 | static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 491 | { |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 492 | list_del(&stp->st_perfile); |
| 493 | list_del(&stp->st_perstateowner); |
| 494 | } |
| 495 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 496 | static void close_generic_stateid(struct nfs4_ol_stateid *stp) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 497 | { |
J. Bruce Fields | 499f3ed | 2011-06-27 16:57:12 -0400 | [diff] [blame] | 498 | int i; |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 499 | |
J. Bruce Fields | 23fcf2e | 2011-03-28 15:15:09 +0800 | [diff] [blame] | 500 | if (stp->st_access_bmap) { |
J. Bruce Fields | 499f3ed | 2011-06-27 16:57:12 -0400 | [diff] [blame] | 501 | for (i = 1; i < 4; i++) { |
| 502 | if (test_bit(i, &stp->st_access_bmap)) |
| 503 | nfs4_file_put_access(stp->st_file, |
| 504 | nfs4_access_to_omode(i)); |
J. Bruce Fields | 4665e2b | 2011-09-06 14:50:49 -0400 | [diff] [blame] | 505 | __clear_bit(i, &stp->st_access_bmap); |
J. Bruce Fields | 499f3ed | 2011-06-27 16:57:12 -0400 | [diff] [blame] | 506 | } |
J. Bruce Fields | 23fcf2e | 2011-03-28 15:15:09 +0800 | [diff] [blame] | 507 | } |
OGAWA Hirofumi | a96e5b9 | 2011-04-18 11:48:55 -0400 | [diff] [blame] | 508 | put_nfs4_file(stp->st_file); |
J. Bruce Fields | 4665e2b | 2011-09-06 14:50:49 -0400 | [diff] [blame] | 509 | stp->st_file = NULL; |
| 510 | } |
| 511 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 512 | static void free_generic_stateid(struct nfs4_ol_stateid *stp) |
J. Bruce Fields | 4665e2b | 2011-09-06 14:50:49 -0400 | [diff] [blame] | 513 | { |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 514 | kmem_cache_free(stateid_slab, stp); |
| 515 | } |
| 516 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 517 | static void release_lock_stateid(struct nfs4_ol_stateid *stp) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 518 | { |
| 519 | struct file *file; |
| 520 | |
| 521 | unhash_generic_stateid(stp); |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 522 | unhash_stid(&stp->st_stid); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 523 | file = find_any_file(stp->st_file); |
| 524 | if (file) |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 525 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 526 | close_generic_stateid(stp); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 527 | free_generic_stateid(stp); |
| 528 | } |
| 529 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 530 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 531 | { |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 532 | struct nfs4_ol_stateid *stp; |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 533 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 534 | list_del(&lo->lo_owner.so_strhash); |
| 535 | list_del(&lo->lo_perstateid); |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 536 | list_del(&lo->lo_owner_ino_hash); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 537 | while (!list_empty(&lo->lo_owner.so_stateids)) { |
| 538 | stp = list_first_entry(&lo->lo_owner.so_stateids, |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 539 | struct nfs4_ol_stateid, st_perstateowner); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 540 | release_lock_stateid(stp); |
| 541 | } |
| 542 | } |
| 543 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 544 | static void release_lockowner(struct nfs4_lockowner *lo) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 545 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 546 | unhash_lockowner(lo); |
| 547 | nfs4_free_lockowner(lo); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 548 | } |
| 549 | |
| 550 | static void |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 551 | release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 552 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 553 | struct nfs4_lockowner *lo; |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 554 | |
| 555 | while (!list_empty(&open_stp->st_lockowners)) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 556 | lo = list_entry(open_stp->st_lockowners.next, |
| 557 | struct nfs4_lockowner, lo_perstateid); |
| 558 | release_lockowner(lo); |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 559 | } |
| 560 | } |
| 561 | |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 562 | static void unhash_open_stateid(struct nfs4_ol_stateid *stp) |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 563 | { |
| 564 | unhash_generic_stateid(stp); |
| 565 | release_stateid_lockowners(stp); |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 566 | close_generic_stateid(stp); |
| 567 | } |
| 568 | |
| 569 | static void release_open_stateid(struct nfs4_ol_stateid *stp) |
| 570 | { |
| 571 | unhash_open_stateid(stp); |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 572 | unhash_stid(&stp->st_stid); |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 573 | free_generic_stateid(stp); |
| 574 | } |
| 575 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 576 | static void unhash_openowner(struct nfs4_openowner *oo) |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 577 | { |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 578 | struct nfs4_ol_stateid *stp; |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 579 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 580 | list_del(&oo->oo_owner.so_strhash); |
| 581 | list_del(&oo->oo_perclient); |
| 582 | while (!list_empty(&oo->oo_owner.so_stateids)) { |
| 583 | stp = list_first_entry(&oo->oo_owner.so_stateids, |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 584 | struct nfs4_ol_stateid, st_perstateowner); |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 585 | release_open_stateid(stp); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 586 | } |
| 587 | } |
| 588 | |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 589 | static void release_last_closed_stateid(struct nfs4_openowner *oo) |
| 590 | { |
| 591 | struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; |
| 592 | |
| 593 | if (s) { |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 594 | unhash_stid(&s->st_stid); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 595 | free_generic_stateid(s); |
| 596 | oo->oo_last_closed_stid = NULL; |
| 597 | } |
| 598 | } |
| 599 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 600 | static void release_openowner(struct nfs4_openowner *oo) |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 601 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 602 | unhash_openowner(oo); |
| 603 | list_del(&oo->oo_close_lru); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 604 | release_last_closed_stateid(oo); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 605 | nfs4_free_openowner(oo); |
J. Bruce Fields | f1d110c | 2009-01-11 14:37:31 -0500 | [diff] [blame] | 606 | } |
| 607 | |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 608 | #define SESSION_HASH_SIZE 512 |
| 609 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; |
| 610 | |
| 611 | static inline int |
| 612 | hash_sessionid(struct nfs4_sessionid *sessionid) |
| 613 | { |
| 614 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; |
| 615 | |
| 616 | return sid->sequence % SESSION_HASH_SIZE; |
| 617 | } |
| 618 | |
Trond Myklebust | 8f199b8 | 2012-03-20 15:11:17 -0400 | [diff] [blame] | 619 | #ifdef NFSD_DEBUG |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 620 | static inline void |
| 621 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) |
| 622 | { |
| 623 | u32 *ptr = (u32 *)(&sessionid->data[0]); |
| 624 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); |
| 625 | } |
Trond Myklebust | 8f199b8 | 2012-03-20 15:11:17 -0400 | [diff] [blame] | 626 | #else |
| 627 | static inline void |
| 628 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) |
| 629 | { |
| 630 | } |
| 631 | #endif |
| 632 | |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 633 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 634 | static void |
| 635 | gen_sessionid(struct nfsd4_session *ses) |
| 636 | { |
| 637 | struct nfs4_client *clp = ses->se_client; |
| 638 | struct nfsd4_sessionid *sid; |
| 639 | |
| 640 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; |
| 641 | sid->clientid = clp->cl_clientid; |
| 642 | sid->sequence = current_sessionid++; |
| 643 | sid->reserved = 0; |
| 644 | } |
| 645 | |
| 646 | /* |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 647 | * The protocol defines ca_maxresponssize_cached to include the size of |
| 648 | * the rpc header, but all we need to cache is the data starting after |
| 649 | * the end of the initial SEQUENCE operation--the rest we regenerate |
| 650 | * each time. Therefore we can advertise a ca_maxresponssize_cached |
| 651 | * value that is the number of bytes in our cache plus a few additional |
| 652 | * bytes. In order to stay on the safe side, and not promise more than |
| 653 | * we can cache, those additional bytes must be the minimum possible: 24 |
| 654 | * bytes of rpc header (xid through accept state, with AUTH_NULL |
| 655 | * verifier), 12 for the compound header (with zero-length tag), and 44 |
| 656 | * for the SEQUENCE op response: |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 657 | */ |
Andy Adamson | a649637 | 2009-08-28 08:45:01 -0400 | [diff] [blame] | 658 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) |
| 659 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 660 | static void |
| 661 | free_session_slots(struct nfsd4_session *ses) |
| 662 | { |
| 663 | int i; |
| 664 | |
| 665 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) |
| 666 | kfree(ses->se_slots[i]); |
| 667 | } |
| 668 | |
J. Bruce Fields | efe0cb6 | 2009-10-24 20:52:16 -0400 | [diff] [blame] | 669 | /* |
| 670 | * We don't actually need to cache the rpc and session headers, so we |
| 671 | * can allocate a little less for each slot: |
| 672 | */ |
| 673 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) |
| 674 | { |
| 675 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; |
| 676 | } |
| 677 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 678 | static int nfsd4_sanitize_slot_size(u32 size) |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 679 | { |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 680 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
| 681 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 682 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 683 | return size; |
| 684 | } |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 685 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 686 | /* |
| 687 | * XXX: If we run out of reserved DRC memory we could (up to a point) |
| 688 | * re-negotiate active sessions and reduce their slot usage to make |
Justin P. Mattock | 42b2aa8 | 2011-11-28 20:31:00 -0800 | [diff] [blame] | 689 | * 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] | 690 | */ |
| 691 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
| 692 | { |
| 693 | int avail; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 694 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 695 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 696 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 697 | spin_lock(&nfsd_drc_lock); |
| 698 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, |
| 699 | nfsd_drc_max_mem - nfsd_drc_mem_used); |
| 700 | num = min_t(int, num, avail / slotsize); |
| 701 | nfsd_drc_mem_used += num * slotsize; |
| 702 | spin_unlock(&nfsd_drc_lock); |
| 703 | |
| 704 | return num; |
| 705 | } |
| 706 | |
| 707 | static void nfsd4_put_drc_mem(int slotsize, int num) |
| 708 | { |
| 709 | spin_lock(&nfsd_drc_lock); |
| 710 | nfsd_drc_mem_used -= slotsize * num; |
| 711 | spin_unlock(&nfsd_drc_lock); |
| 712 | } |
| 713 | |
| 714 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
| 715 | { |
| 716 | struct nfsd4_session *new; |
| 717 | int mem, i; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 718 | |
J. Bruce Fields | c23753d | 2010-09-27 16:22:30 -0400 | [diff] [blame] | 719 | 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] | 720 | + sizeof(struct nfsd4_session) > PAGE_SIZE); |
| 721 | mem = numslots * sizeof(struct nfsd4_slot *); |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 722 | |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 723 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 724 | if (!new) |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 725 | return NULL; |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 726 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 727 | for (i = 0; i < numslots; i++) { |
| 728 | mem = sizeof(struct nfsd4_slot) + slotsize; |
| 729 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); |
| 730 | if (!new->se_slots[i]) |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 731 | goto out_free; |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 732 | } |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 733 | return new; |
| 734 | out_free: |
| 735 | while (i--) |
| 736 | kfree(new->se_slots[i]); |
| 737 | kfree(new); |
| 738 | return NULL; |
| 739 | } |
| 740 | |
| 741 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
| 742 | { |
| 743 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
| 744 | |
| 745 | new->maxreqs = numslots; |
Mi Jinlong | d2b2174 | 2011-03-10 17:43:37 +0800 | [diff] [blame] | 746 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
| 747 | slotsize + NFSD_MIN_HDR_SEQ_SZ); |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 748 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
| 749 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); |
| 750 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); |
| 751 | } |
| 752 | |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 753 | static void free_conn(struct nfsd4_conn *c) |
| 754 | { |
| 755 | svc_xprt_put(c->cn_xprt); |
| 756 | kfree(c); |
| 757 | } |
| 758 | |
| 759 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
| 760 | { |
| 761 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); |
| 762 | struct nfs4_client *clp = c->cn_session->se_client; |
| 763 | |
| 764 | spin_lock(&clp->cl_lock); |
| 765 | if (!list_empty(&c->cn_persession)) { |
| 766 | list_del(&c->cn_persession); |
| 767 | free_conn(c); |
| 768 | } |
| 769 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | eea4980 | 2010-11-18 08:34:12 -0500 | [diff] [blame] | 770 | nfsd4_probe_callback(clp); |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 771 | } |
| 772 | |
J. Bruce Fields | d29c374 | 2010-06-15 17:34:11 -0400 | [diff] [blame] | 773 | 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] | 774 | { |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 775 | struct nfsd4_conn *conn; |
| 776 | |
| 777 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
| 778 | if (!conn) |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 779 | return NULL; |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 780 | svc_xprt_get(rqstp->rq_xprt); |
| 781 | conn->cn_xprt = rqstp->rq_xprt; |
J. Bruce Fields | d29c374 | 2010-06-15 17:34:11 -0400 | [diff] [blame] | 782 | conn->cn_flags = flags; |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 783 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
| 784 | return conn; |
| 785 | } |
| 786 | |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 787 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
| 788 | { |
| 789 | conn->cn_session = ses; |
| 790 | list_add(&conn->cn_persession, &ses->se_conns); |
| 791 | } |
| 792 | |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 793 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
| 794 | { |
| 795 | struct nfs4_client *clp = ses->se_client; |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 796 | |
| 797 | spin_lock(&clp->cl_lock); |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 798 | __nfsd4_hash_conn(conn, ses); |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 799 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 800 | } |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 801 | |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 802 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 803 | { |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 804 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 805 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 806 | } |
| 807 | |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 808 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 809 | { |
| 810 | struct nfsd4_conn *conn; |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 811 | int ret; |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 812 | |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 813 | conn = alloc_conn(rqstp, dir); |
J. Bruce Fields | db90681 | 2010-09-29 15:29:32 -0400 | [diff] [blame] | 814 | if (!conn) |
| 815 | return nfserr_jukebox; |
| 816 | nfsd4_hash_conn(conn, ses); |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 817 | ret = nfsd4_register_conn(conn); |
| 818 | if (ret) |
| 819 | /* oops; xprt is already down: */ |
| 820 | nfsd4_conn_lost(&conn->cn_xpt_user); |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 821 | return nfs_ok; |
| 822 | } |
| 823 | |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 824 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
| 825 | { |
| 826 | u32 dir = NFS4_CDFC4_FORE; |
| 827 | |
| 828 | if (ses->se_flags & SESSION4_BACK_CHAN) |
| 829 | dir |= NFS4_CDFC4_BACK; |
| 830 | |
| 831 | return nfsd4_new_conn(rqstp, ses, dir); |
| 832 | } |
| 833 | |
| 834 | /* must be called under client_lock */ |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 835 | static void nfsd4_del_conns(struct nfsd4_session *s) |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 836 | { |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 837 | struct nfs4_client *clp = s->se_client; |
| 838 | struct nfsd4_conn *c; |
| 839 | |
| 840 | spin_lock(&clp->cl_lock); |
| 841 | while (!list_empty(&s->se_conns)) { |
| 842 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); |
| 843 | list_del_init(&c->cn_persession); |
| 844 | spin_unlock(&clp->cl_lock); |
| 845 | |
| 846 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
| 847 | free_conn(c); |
| 848 | |
| 849 | spin_lock(&clp->cl_lock); |
| 850 | } |
| 851 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 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; |
| 857 | int mem; |
| 858 | |
J. Bruce Fields | 1f62b81 | 2012-06-12 08:28:48 -0400 | [diff] [blame] | 859 | lockdep_assert_held(&client_lock); |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 860 | ses = container_of(kref, struct nfsd4_session, se_ref); |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 861 | nfsd4_del_conns(ses); |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 862 | spin_lock(&nfsd_drc_lock); |
| 863 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); |
| 864 | nfsd_drc_mem_used -= mem; |
| 865 | spin_unlock(&nfsd_drc_lock); |
| 866 | free_session_slots(ses); |
| 867 | kfree(ses); |
| 868 | } |
| 869 | |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 870 | void nfsd4_put_session(struct nfsd4_session *ses) |
| 871 | { |
| 872 | spin_lock(&client_lock); |
| 873 | nfsd4_put_session_locked(ses); |
| 874 | spin_unlock(&client_lock); |
| 875 | } |
| 876 | |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 877 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 878 | { |
| 879 | struct nfsd4_session *new; |
| 880 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; |
| 881 | int numslots, slotsize; |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 882 | int status; |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 883 | int idx; |
| 884 | |
| 885 | /* |
| 886 | * Note decreasing slot size below client's request may |
| 887 | * make it difficult for client to function correctly, whereas |
| 888 | * decreasing the number of slots will (just?) affect |
| 889 | * performance. When short on memory we therefore prefer to |
| 890 | * decrease number of slots instead of their size. |
| 891 | */ |
| 892 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); |
| 893 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); |
Mi Jinlong | ced6dfe | 2010-11-11 18:03:50 +0800 | [diff] [blame] | 894 | if (numslots < 1) |
| 895 | return NULL; |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 896 | |
| 897 | new = alloc_session(slotsize, numslots); |
| 898 | if (!new) { |
| 899 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 900 | return NULL; |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 901 | } |
| 902 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 903 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 904 | new->se_client = clp; |
| 905 | gen_sessionid(new); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 906 | |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 907 | INIT_LIST_HEAD(&new->se_conns); |
| 908 | |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 909 | new->se_cb_seq_nr = 1; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 910 | new->se_flags = cses->flags; |
J. Bruce Fields | 8b5ce5c | 2010-10-19 17:31:50 -0400 | [diff] [blame] | 911 | new->se_cb_prog = cses->callback_prog; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 912 | kref_init(&new->se_ref); |
J. Bruce Fields | 5b6feee | 2010-09-27 17:12:05 -0400 | [diff] [blame] | 913 | idx = hash_sessionid(&new->se_sessionid); |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 914 | spin_lock(&client_lock); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 915 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 916 | spin_lock(&clp->cl_lock); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 917 | list_add(&new->se_perclnt, &clp->cl_sessions); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 918 | spin_unlock(&clp->cl_lock); |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 919 | spin_unlock(&client_lock); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 920 | |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 921 | status = nfsd4_new_conn_from_crses(rqstp, new); |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 922 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 923 | if (status) { |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 924 | spin_lock(&client_lock); |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 925 | free_session(&new->se_ref); |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 926 | spin_unlock(&client_lock); |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 927 | return NULL; |
J. Bruce Fields | c766251 | 2010-06-06 18:12:14 -0400 | [diff] [blame] | 928 | } |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 929 | if (cses->flags & SESSION4_BACK_CHAN) { |
J. Bruce Fields | edd7678 | 2010-06-14 22:26:31 -0400 | [diff] [blame] | 930 | struct sockaddr *sa = svc_addr(rqstp); |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 931 | /* |
| 932 | * This is a little silly; with sessions there's no real |
| 933 | * use for the callback address. Use the peer address |
| 934 | * as a reasonable default for now, but consider fixing |
| 935 | * the rpc client not to require an address in the |
| 936 | * future: |
| 937 | */ |
J. Bruce Fields | edd7678 | 2010-06-14 22:26:31 -0400 | [diff] [blame] | 938 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
| 939 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); |
J. Bruce Fields | edd7678 | 2010-06-14 22:26:31 -0400 | [diff] [blame] | 940 | } |
J. Bruce Fields | dcbeaa6 | 2010-06-15 17:25:45 -0400 | [diff] [blame] | 941 | nfsd4_probe_callback(clp); |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 942 | return new; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 943 | } |
| 944 | |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 945 | /* caller must hold client_lock */ |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 946 | static struct nfsd4_session * |
| 947 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) |
| 948 | { |
| 949 | struct nfsd4_session *elem; |
| 950 | int idx; |
| 951 | |
| 952 | dump_sessionid(__func__, sessionid); |
| 953 | idx = hash_sessionid(sessionid); |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 954 | /* Search in the appropriate list */ |
| 955 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 956 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
| 957 | NFS4_MAX_SESSIONID_LEN)) { |
| 958 | return elem; |
| 959 | } |
| 960 | } |
| 961 | |
| 962 | dprintk("%s: session not found\n", __func__); |
| 963 | return NULL; |
| 964 | } |
| 965 | |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 966 | /* caller must hold client_lock */ |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 967 | static void |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 968 | unhash_session(struct nfsd4_session *ses) |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 969 | { |
| 970 | list_del(&ses->se_hash); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 971 | spin_lock(&ses->se_client->cl_lock); |
Andy Adamson | 7116ed6 | 2009-04-03 08:27:43 +0300 | [diff] [blame] | 972 | list_del(&ses->se_perclnt); |
J. Bruce Fields | 4c64937 | 2010-06-15 14:22:37 -0400 | [diff] [blame] | 973 | spin_unlock(&ses->se_client->cl_lock); |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 974 | } |
| 975 | |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 976 | /* must be called under the client_lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | static inline void |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 978 | renew_client_locked(struct nfs4_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | { |
Benny Halevy | 07cd490 | 2010-05-12 00:13:41 +0300 | [diff] [blame] | 980 | if (is_client_expired(clp)) { |
| 981 | dprintk("%s: client (clientid %08x/%08x) already expired\n", |
| 982 | __func__, |
| 983 | clp->cl_clientid.cl_boot, |
| 984 | clp->cl_clientid.cl_id); |
| 985 | return; |
| 986 | } |
| 987 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | dprintk("renewing client (clientid %08x/%08x)\n", |
| 989 | clp->cl_clientid.cl_boot, |
| 990 | clp->cl_clientid.cl_id); |
| 991 | list_move_tail(&clp->cl_lru, &client_lru); |
| 992 | clp->cl_time = get_seconds(); |
| 993 | } |
| 994 | |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 995 | static inline void |
| 996 | renew_client(struct nfs4_client *clp) |
| 997 | { |
| 998 | spin_lock(&client_lock); |
| 999 | renew_client_locked(clp); |
| 1000 | spin_unlock(&client_lock); |
| 1001 | } |
| 1002 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
| 1004 | static int |
| 1005 | STALE_CLIENTID(clientid_t *clid) |
| 1006 | { |
| 1007 | if (clid->cl_boot == boot_time) |
| 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", |
| 1010 | clid->cl_boot, clid->cl_id, 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 | { |
J. Bruce Fields | 1f62b81 | 2012-06-12 08:28:48 -0400 | [diff] [blame] | 1038 | lockdep_assert_held(&client_lock); |
J. Bruce Fields | 792c95d | 2010-10-12 19:55:25 -0400 | [diff] [blame] | 1039 | while (!list_empty(&clp->cl_sessions)) { |
| 1040 | struct nfsd4_session *ses; |
| 1041 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, |
| 1042 | se_perclnt); |
| 1043 | list_del(&ses->se_perclnt); |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 1044 | nfsd4_put_session_locked(ses); |
J. Bruce Fields | 792c95d | 2010-10-12 19:55:25 -0400 | [diff] [blame] | 1045 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | if (clp->cl_cred.cr_group_info) |
| 1047 | put_group_info(clp->cl_cred.cr_group_info); |
Olga Kornievskaia | 68e76ad | 2008-12-23 16:17:15 -0500 | [diff] [blame] | 1048 | kfree(clp->cl_principal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | kfree(clp->cl_name.data); |
majianpeng | 6c669ca | 2013-01-29 13:16:06 +0800 | [diff] [blame] | 1050 | idr_remove_all(&clp->cl_stateids); |
| 1051 | idr_destroy(&clp->cl_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | kfree(clp); |
| 1053 | } |
| 1054 | |
Benny Halevy | d768298 | 2010-05-12 00:13:54 +0300 | [diff] [blame] | 1055 | void |
| 1056 | release_session_client(struct nfsd4_session *session) |
| 1057 | { |
| 1058 | struct nfs4_client *clp = session->se_client; |
| 1059 | |
| 1060 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) |
| 1061 | return; |
| 1062 | if (is_client_expired(clp)) { |
| 1063 | free_client(clp); |
| 1064 | session->se_client = NULL; |
| 1065 | } else |
| 1066 | renew_client_locked(clp); |
| 1067 | spin_unlock(&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 |
| 1085 | expire_client(struct nfs4_client *clp) |
| 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; |
| 1090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | INIT_LIST_HEAD(&reaplist); |
| 1092 | spin_lock(&recall_lock); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1093 | while (!list_empty(&clp->cl_delegations)) { |
| 1094 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1095 | list_del_init(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | list_move(&dp->dl_recall_lru, &reaplist); |
| 1097 | } |
| 1098 | spin_unlock(&recall_lock); |
| 1099 | while (!list_empty(&reaplist)) { |
| 1100 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | unhash_delegation(dp); |
| 1102 | } |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1103 | while (!list_empty(&clp->cl_openowners)) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 1104 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
| 1105 | release_openowner(oo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | } |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1107 | nfsd4_shutdown_callback(clp); |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 1108 | if (clp->cl_cb_conn.cb_xprt) |
| 1109 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 1110 | list_del(&clp->cl_idhash); |
| 1111 | list_del(&clp->cl_strhash); |
| 1112 | spin_lock(&client_lock); |
| 1113 | unhash_client_locked(clp); |
Benny Halevy | 46583e2 | 2010-05-12 00:13:29 +0300 | [diff] [blame] | 1114 | if (atomic_read(&clp->cl_refcount) == 0) |
| 1115 | free_client(clp); |
Benny Halevy | 84d38ac | 2010-05-12 00:13:16 +0300 | [diff] [blame] | 1116 | spin_unlock(&client_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | } |
| 1118 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1119 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
| 1120 | { |
| 1121 | memcpy(target->cl_verifier.data, source->data, |
| 1122 | sizeof(target->cl_verifier.data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | } |
| 1124 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1125 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
| 1126 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
| 1128 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; |
| 1129 | } |
| 1130 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1131 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
| 1132 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | target->cr_uid = source->cr_uid; |
| 1134 | target->cr_gid = source->cr_gid; |
| 1135 | target->cr_group_info = source->cr_group_info; |
| 1136 | get_group_info(target->cr_group_info); |
| 1137 | } |
| 1138 | |
J. Bruce Fields | 35bba9a | 2007-11-21 22:07:08 -0500 | [diff] [blame] | 1139 | static int same_name(const char *n1, const char *n2) |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1140 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1141 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | } |
| 1143 | |
| 1144 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1145 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
| 1146 | { |
| 1147 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | } |
| 1149 | |
| 1150 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1151 | same_clid(clientid_t *cl1, clientid_t *cl2) |
| 1152 | { |
| 1153 | 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] | 1154 | } |
| 1155 | |
| 1156 | /* XXX what about NGROUP */ |
| 1157 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1158 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
| 1159 | { |
| 1160 | return cr1->cr_uid == cr2->cr_uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | } |
| 1162 | |
J. Bruce Fields | 5ec7b46 | 2007-11-21 21:58:56 -0500 | [diff] [blame] | 1163 | static void gen_clid(struct nfs4_client *clp) |
| 1164 | { |
| 1165 | static u32 current_clientid = 1; |
| 1166 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | clp->cl_clientid.cl_boot = boot_time; |
| 1168 | clp->cl_clientid.cl_id = current_clientid++; |
| 1169 | } |
| 1170 | |
J. Bruce Fields | deda2fa | 2007-11-19 20:31:04 -0500 | [diff] [blame] | 1171 | static void gen_confirm(struct nfs4_client *clp) |
| 1172 | { |
Chuck Lever | ab4684d | 2012-03-02 17:13:50 -0500 | [diff] [blame] | 1173 | __be32 verf[2]; |
J. Bruce Fields | deda2fa | 2007-11-19 20:31:04 -0500 | [diff] [blame] | 1174 | static u32 i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | |
Chuck Lever | ab4684d | 2012-03-02 17:13:50 -0500 | [diff] [blame] | 1176 | verf[0] = (__be32)get_seconds(); |
| 1177 | verf[1] = (__be32)i++; |
| 1178 | memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | } |
| 1180 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 1181 | 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] | 1182 | { |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 1183 | return idr_find(&cl->cl_stateids, t->si_opaque.so_id); |
J. Bruce Fields | 4d71ab8 | 2011-09-06 16:48:57 -0400 | [diff] [blame] | 1184 | } |
| 1185 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 1186 | 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] | 1187 | { |
| 1188 | struct nfs4_stid *s; |
| 1189 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 1190 | s = find_stateid(cl, t); |
J. Bruce Fields | f459e45 | 2011-09-09 09:06:12 -0400 | [diff] [blame] | 1191 | if (!s) |
| 1192 | return NULL; |
| 1193 | if (typemask & s->sc_type) |
J. Bruce Fields | 4d71ab8 | 2011-09-06 16:48:57 -0400 | [diff] [blame] | 1194 | return s; |
J. Bruce Fields | 4581d14 | 2011-09-06 14:56:09 -0400 | [diff] [blame] | 1195 | return NULL; |
| 1196 | } |
| 1197 | |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1198 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
| 1199 | struct svc_rqst *rqstp, nfs4_verifier *verf) |
| 1200 | { |
| 1201 | struct nfs4_client *clp; |
| 1202 | struct sockaddr *sa = svc_addr(rqstp); |
| 1203 | char *princ; |
| 1204 | |
| 1205 | clp = alloc_client(name); |
| 1206 | if (clp == NULL) |
| 1207 | return NULL; |
| 1208 | |
J. Bruce Fields | 792c95d | 2010-10-12 19:55:25 -0400 | [diff] [blame] | 1209 | INIT_LIST_HEAD(&clp->cl_sessions); |
| 1210 | |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1211 | princ = svc_gss_principal(rqstp); |
| 1212 | if (princ) { |
| 1213 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); |
| 1214 | if (clp->cl_principal == NULL) { |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 1215 | spin_lock(&client_lock); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1216 | free_client(clp); |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 1217 | spin_unlock(&client_lock); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1218 | return NULL; |
| 1219 | } |
| 1220 | } |
| 1221 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 1222 | idr_init(&clp->cl_stateids); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1223 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
Benny Halevy | 46583e2 | 2010-05-12 00:13:29 +0300 | [diff] [blame] | 1224 | atomic_set(&clp->cl_refcount, 0); |
J. Bruce Fields | 77a3569 | 2010-04-30 18:51:44 -0400 | [diff] [blame] | 1225 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1226 | INIT_LIST_HEAD(&clp->cl_idhash); |
| 1227 | INIT_LIST_HEAD(&clp->cl_strhash); |
| 1228 | INIT_LIST_HEAD(&clp->cl_openowners); |
| 1229 | INIT_LIST_HEAD(&clp->cl_delegations); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1230 | INIT_LIST_HEAD(&clp->cl_lru); |
J. Bruce Fields | 5ce8ba2 | 2011-01-10 16:44:41 -0500 | [diff] [blame] | 1231 | INIT_LIST_HEAD(&clp->cl_callbacks); |
J. Bruce Fields | 6ff8da0 | 2010-06-04 20:04:45 -0400 | [diff] [blame] | 1232 | spin_lock_init(&clp->cl_lock); |
J. Bruce Fields | cee277d | 2010-05-26 17:52:14 -0400 | [diff] [blame] | 1233 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
Benny Halevy | 07cd490 | 2010-05-12 00:13:41 +0300 | [diff] [blame] | 1234 | clp->cl_time = get_seconds(); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1235 | clear_bit(0, &clp->cl_cb_slot_busy); |
| 1236 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); |
| 1237 | copy_verf(clp, verf); |
| 1238 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); |
| 1239 | clp->cl_flavor = rqstp->rq_flavor; |
| 1240 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); |
| 1241 | gen_confirm(clp); |
J. Bruce Fields | edd7678 | 2010-06-14 22:26:31 -0400 | [diff] [blame] | 1242 | clp->cl_cb_session = NULL; |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1243 | return clp; |
| 1244 | } |
| 1245 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1246 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
| 1248 | { |
| 1249 | unsigned int idhashval; |
| 1250 | |
| 1251 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); |
| 1252 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 1253 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 1254 | renew_client(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | } |
| 1256 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1257 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | move_to_confirmed(struct nfs4_client *clp) |
| 1259 | { |
| 1260 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 1261 | unsigned int strhashval; |
| 1262 | |
| 1263 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
Akinobu Mita | f116629 | 2006-06-26 00:24:46 -0700 | [diff] [blame] | 1264 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 1265 | strhashval = clientstr_hashval(clp->cl_recdir); |
Benny Halevy | 328efba | 2010-05-12 00:12:51 +0300 | [diff] [blame] | 1266 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | renew_client(clp); |
| 1268 | } |
| 1269 | |
| 1270 | static struct nfs4_client * |
| 1271 | find_confirmed_client(clientid_t *clid) |
| 1272 | { |
| 1273 | struct nfs4_client *clp; |
| 1274 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 1275 | |
| 1276 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { |
J. Bruce Fields | a50d2ad | 2011-10-12 16:24:27 -0400 | [diff] [blame] | 1277 | if (same_clid(&clp->cl_clientid, clid)) { |
| 1278 | renew_client(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | return clp; |
J. Bruce Fields | a50d2ad | 2011-10-12 16:24:27 -0400 | [diff] [blame] | 1280 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | } |
| 1282 | return NULL; |
| 1283 | } |
| 1284 | |
| 1285 | static struct nfs4_client * |
| 1286 | find_unconfirmed_client(clientid_t *clid) |
| 1287 | { |
| 1288 | struct nfs4_client *clp; |
| 1289 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 1290 | |
| 1291 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 1292 | if (same_clid(&clp->cl_clientid, clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | return clp; |
| 1294 | } |
| 1295 | return NULL; |
| 1296 | } |
| 1297 | |
J. Bruce Fields | 6e5f15c | 2010-11-24 17:17:34 -0500 | [diff] [blame] | 1298 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1299 | { |
J. Bruce Fields | 6e5f15c | 2010-11-24 17:17:34 -0500 | [diff] [blame] | 1300 | return clp->cl_exchange_flags != 0; |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 1301 | } |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 1302 | |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1303 | static struct nfs4_client * |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 1304 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1305 | { |
| 1306 | struct nfs4_client *clp; |
| 1307 | |
| 1308 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 1309 | if (same_name(clp->cl_recdir, dname)) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1310 | return clp; |
| 1311 | } |
| 1312 | return NULL; |
| 1313 | } |
| 1314 | |
| 1315 | static struct nfs4_client * |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 1316 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1317 | { |
| 1318 | struct nfs4_client *clp; |
| 1319 | |
| 1320 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 1321 | if (same_name(clp->cl_recdir, dname)) |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 1322 | return clp; |
| 1323 | } |
| 1324 | return NULL; |
| 1325 | } |
| 1326 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1327 | static void |
Takuma Umeya | 6f3d772 | 2010-12-15 14:09:01 +0900 | [diff] [blame] | 1328 | 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] | 1329 | { |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1330 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
Takuma Umeya | 6f3d772 | 2010-12-15 14:09:01 +0900 | [diff] [blame] | 1331 | struct sockaddr *sa = svc_addr(rqstp); |
| 1332 | u32 scopeid = rpc_get_scope_id(sa); |
Jeff Layton | 7077ecb | 2009-08-14 12:57:58 -0400 | [diff] [blame] | 1333 | unsigned short expected_family; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | |
Jeff Layton | 7077ecb | 2009-08-14 12:57:58 -0400 | [diff] [blame] | 1335 | /* Currently, we only support tcp and tcp6 for the callback channel */ |
| 1336 | if (se->se_callback_netid_len == 3 && |
| 1337 | !memcmp(se->se_callback_netid_val, "tcp", 3)) |
| 1338 | expected_family = AF_INET; |
| 1339 | else if (se->se_callback_netid_len == 4 && |
| 1340 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) |
| 1341 | expected_family = AF_INET6; |
| 1342 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | goto out_err; |
| 1344 | |
Stanislav Kinsbursky | f2ac4dc | 2012-01-13 13:09:27 +0400 | [diff] [blame] | 1345 | conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 1346 | se->se_callback_addr_len, |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1347 | (struct sockaddr *)&conn->cb_addr, |
| 1348 | sizeof(conn->cb_addr)); |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 1349 | |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1350 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | goto out_err; |
Jeff Layton | aa9a4ec | 2009-08-14 12:57:57 -0400 | [diff] [blame] | 1352 | |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1353 | if (conn->cb_addr.ss_family == AF_INET6) |
| 1354 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; |
Jeff Layton | fbf4665 | 2009-08-14 12:57:59 -0400 | [diff] [blame] | 1355 | |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1356 | conn->cb_prog = se->se_callback_prog; |
| 1357 | conn->cb_ident = se->se_callback_ident; |
Mi Jinlong | 849a1cf | 2011-08-30 17:18:41 +0800 | [diff] [blame] | 1358 | memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | return; |
| 1360 | out_err: |
J. Bruce Fields | 07263f1 | 2010-05-31 19:09:40 -0400 | [diff] [blame] | 1361 | conn->cb_addr.ss_family = AF_UNSPEC; |
| 1362 | conn->cb_addrlen = 0; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 1363 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | "will not receive delegations\n", |
| 1365 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 1366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | return; |
| 1368 | } |
| 1369 | |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1370 | /* |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1371 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1372 | */ |
| 1373 | void |
| 1374 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) |
| 1375 | { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1376 | struct nfsd4_slot *slot = resp->cstate.slot; |
| 1377 | unsigned int base; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1378 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1379 | dprintk("--> %s slot %p\n", __func__, slot); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1380 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1381 | slot->sl_opcnt = resp->opcnt; |
| 1382 | slot->sl_status = resp->cstate.status; |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1383 | |
J. Bruce Fields | bf5c43c | 2012-02-13 16:56:19 -0500 | [diff] [blame] | 1384 | slot->sl_flags |= NFSD4_SLOT_INITIALIZED; |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1385 | if (nfsd4_not_cached(resp)) { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1386 | slot->sl_datalen = 0; |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1387 | return; |
| 1388 | } |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1389 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
| 1390 | base = (char *)resp->cstate.datap - |
| 1391 | (char *)resp->xbuf->head[0].iov_base; |
| 1392 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, |
| 1393 | slot->sl_datalen)) |
| 1394 | WARN("%s: sessions DRC could not cache compound\n", __func__); |
| 1395 | return; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1396 | } |
| 1397 | |
| 1398 | /* |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1399 | * Encode the replay sequence operation from the slot values. |
| 1400 | * If cachethis is FALSE encode the uncached rep error on the next |
| 1401 | * operation which sets resp->p and increments resp->opcnt for |
| 1402 | * nfs4svc_encode_compoundres. |
| 1403 | * |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1404 | */ |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1405 | static __be32 |
| 1406 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, |
| 1407 | struct nfsd4_compoundres *resp) |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1408 | { |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1409 | struct nfsd4_op *op; |
| 1410 | struct nfsd4_slot *slot = resp->cstate.slot; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1411 | |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1412 | /* Encode the replayed sequence operation */ |
| 1413 | op = &args->ops[resp->opcnt - 1]; |
| 1414 | nfsd4_encode_operation(resp, op); |
| 1415 | |
| 1416 | /* Return nfserr_retry_uncached_rep in next operation. */ |
J. Bruce Fields | 73e7948 | 2012-02-13 16:39:00 -0500 | [diff] [blame] | 1417 | if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1418 | op = &args->ops[resp->opcnt++]; |
| 1419 | op->status = nfserr_retry_uncached_rep; |
| 1420 | nfsd4_encode_operation(resp, op); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1421 | } |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1422 | return op->status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1423 | } |
| 1424 | |
| 1425 | /* |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1426 | * The sequence operation is not cached because we can use the slot and |
| 1427 | * session values. |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1428 | */ |
| 1429 | __be32 |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1430 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
| 1431 | struct nfsd4_sequence *seq) |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1432 | { |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1433 | struct nfsd4_slot *slot = resp->cstate.slot; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1434 | __be32 status; |
| 1435 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1436 | dprintk("--> %s slot %p\n", __func__, slot); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1437 | |
Andy Adamson | abfabf8 | 2009-07-23 19:02:18 -0400 | [diff] [blame] | 1438 | /* Either returns 0 or nfserr_retry_uncached */ |
| 1439 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); |
| 1440 | if (status == nfserr_retry_uncached_rep) |
| 1441 | return status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1442 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1443 | /* The sequence operation has been encoded, cstate->datap set. */ |
| 1444 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1445 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1446 | resp->opcnt = slot->sl_opcnt; |
| 1447 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); |
| 1448 | status = slot->sl_status; |
Andy Adamson | 074fe89 | 2009-04-03 08:28:15 +0300 | [diff] [blame] | 1449 | |
| 1450 | return status; |
| 1451 | } |
| 1452 | |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1453 | /* |
| 1454 | * Set the exchange_id flags returned by the server. |
| 1455 | */ |
| 1456 | static void |
| 1457 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) |
| 1458 | { |
| 1459 | /* pNFS is not supported */ |
| 1460 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; |
| 1461 | |
| 1462 | /* Referrals are supported, Migration is not. */ |
| 1463 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; |
| 1464 | |
| 1465 | /* set the wire flags to return to client. */ |
| 1466 | clid->flags = new->cl_exchange_flags; |
| 1467 | } |
| 1468 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 1469 | __be32 |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1470 | nfsd4_exchange_id(struct svc_rqst *rqstp, |
| 1471 | struct nfsd4_compound_state *cstate, |
| 1472 | struct nfsd4_exchange_id *exid) |
| 1473 | { |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1474 | struct nfs4_client *unconf, *conf, *new; |
| 1475 | int status; |
| 1476 | unsigned int strhashval; |
| 1477 | char dname[HEXDIR_LEN]; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1478 | char addr_str[INET6_ADDRSTRLEN]; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1479 | nfs4_verifier verf = exid->verifier; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1480 | struct sockaddr *sa = svc_addr(rqstp); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1481 | |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1482 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1483 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1484 | "ip_addr=%s flags %x, spa_how %d\n", |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1485 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1486 | addr_str, exid->flags, exid->spa_how); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1487 | |
J. Bruce Fields | a084daf | 2011-10-10 15:07:40 -0400 | [diff] [blame] | 1488 | if (exid->flags & ~EXCHGID4_FLAG_MASK_A) |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1489 | return nfserr_inval; |
| 1490 | |
| 1491 | /* Currently only support SP4_NONE */ |
| 1492 | switch (exid->spa_how) { |
| 1493 | case SP4_NONE: |
| 1494 | break; |
| 1495 | case SP4_SSV: |
J. Bruce Fields | 044bc1d | 2010-11-12 14:36:06 -0500 | [diff] [blame] | 1496 | return nfserr_serverfault; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1497 | default: |
| 1498 | BUG(); /* checked by xdr code */ |
| 1499 | case SP4_MACH_CRED: |
| 1500 | return nfserr_serverfault; /* no excuse :-/ */ |
| 1501 | } |
| 1502 | |
| 1503 | status = nfs4_make_rec_clidname(dname, &exid->clname); |
| 1504 | |
| 1505 | if (status) |
| 1506 | goto error; |
| 1507 | |
| 1508 | strhashval = clientstr_hashval(dname); |
| 1509 | |
| 1510 | nfs4_lock_state(); |
| 1511 | status = nfs_ok; |
| 1512 | |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 1513 | conf = find_confirmed_client_by_str(dname, strhashval); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1514 | if (conf) { |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 1515 | if (!clp_used_exchangeid(conf)) { |
| 1516 | status = nfserr_clid_inuse; /* XXX: ? */ |
| 1517 | goto out; |
| 1518 | } |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1519 | if (!same_verf(&verf, &conf->cl_verifier)) { |
| 1520 | /* 18.35.4 case 8 */ |
| 1521 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { |
| 1522 | status = nfserr_not_same; |
| 1523 | goto out; |
| 1524 | } |
| 1525 | /* Client reboot: destroy old state */ |
| 1526 | expire_client(conf); |
| 1527 | goto out_new; |
| 1528 | } |
| 1529 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
| 1530 | /* 18.35.4 case 9 */ |
| 1531 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { |
| 1532 | status = nfserr_perm; |
| 1533 | goto out; |
| 1534 | } |
| 1535 | expire_client(conf); |
| 1536 | goto out_new; |
| 1537 | } |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1538 | /* |
| 1539 | * Set bit when the owner id and verifier map to an already |
| 1540 | * confirmed client id (18.35.3). |
| 1541 | */ |
| 1542 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; |
| 1543 | |
| 1544 | /* |
| 1545 | * Falling into 18.35.4 case 2, possible router replay. |
| 1546 | * Leave confirmed record intact and return same result. |
| 1547 | */ |
| 1548 | copy_verf(conf, &verf); |
| 1549 | new = conf; |
| 1550 | goto out_copy; |
Mike Sager | 6ddbbbf | 2009-06-16 04:20:47 +0300 | [diff] [blame] | 1551 | } |
| 1552 | |
| 1553 | /* 18.35.4 case 7 */ |
| 1554 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { |
| 1555 | status = nfserr_noent; |
| 1556 | goto out; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1557 | } |
| 1558 | |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 1559 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1560 | if (unconf) { |
| 1561 | /* |
| 1562 | * Possible retry or client restart. Per 18.35.4 case 4, |
| 1563 | * a new unconfirmed record should be generated regardless |
| 1564 | * of whether any properties have changed. |
| 1565 | */ |
| 1566 | expire_client(unconf); |
| 1567 | } |
| 1568 | |
| 1569 | out_new: |
| 1570 | /* Normal case */ |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 1571 | new = create_client(exid->clname, dname, rqstp, &verf); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1572 | if (new == NULL) { |
J. Bruce Fields | 4731030 | 2010-06-22 16:17:12 -0400 | [diff] [blame] | 1573 | status = nfserr_jukebox; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1574 | goto out; |
| 1575 | } |
| 1576 | |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1577 | gen_clid(new); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1578 | add_to_unconfirmed(new, strhashval); |
| 1579 | out_copy: |
| 1580 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; |
| 1581 | exid->clientid.cl_id = new->cl_clientid.cl_id; |
| 1582 | |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1583 | exid->seqid = 1; |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1584 | nfsd4_set_ex_flags(new, exid); |
| 1585 | |
| 1586 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1587 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
Andy Adamson | 0733d21 | 2009-04-03 08:28:01 +0300 | [diff] [blame] | 1588 | status = nfs_ok; |
| 1589 | |
| 1590 | out: |
| 1591 | nfs4_unlock_state(); |
| 1592 | error: |
| 1593 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); |
| 1594 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1595 | } |
| 1596 | |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1597 | static int |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1598 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1599 | { |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1600 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
| 1601 | slot_seqid); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1602 | |
| 1603 | /* The slot is in use, and no response has been sent. */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1604 | if (slot_inuse) { |
| 1605 | if (seqid == slot_seqid) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1606 | return nfserr_jukebox; |
| 1607 | else |
| 1608 | return nfserr_seq_misordered; |
| 1609 | } |
J. Bruce Fields | f6d8248 | 2012-02-13 16:13:41 -0500 | [diff] [blame] | 1610 | /* Note unsigned 32-bit arithmetic handles wraparound: */ |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1611 | if (likely(seqid == slot_seqid + 1)) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1612 | return nfs_ok; |
Andy Adamson | 88e588d | 2009-07-23 19:02:15 -0400 | [diff] [blame] | 1613 | if (seqid == slot_seqid) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1614 | return nfserr_replay_cache; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1615 | return nfserr_seq_misordered; |
| 1616 | } |
| 1617 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1618 | /* |
| 1619 | * Cache the create session result into the create session single DRC |
| 1620 | * slot cache by saving the xdr structure. sl_seqid has been set. |
| 1621 | * Do this for solo or embedded create session operations. |
| 1622 | */ |
| 1623 | static void |
| 1624 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, |
| 1625 | struct nfsd4_clid_slot *slot, int nfserr) |
| 1626 | { |
| 1627 | slot->sl_status = nfserr; |
| 1628 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); |
| 1629 | } |
| 1630 | |
| 1631 | static __be32 |
| 1632 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, |
| 1633 | struct nfsd4_clid_slot *slot) |
| 1634 | { |
| 1635 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); |
| 1636 | return slot->sl_status; |
| 1637 | } |
| 1638 | |
Mi Jinlong | 1b74c25 | 2011-07-14 14:50:17 +0800 | [diff] [blame] | 1639 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
| 1640 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ |
| 1641 | 1 + /* MIN tag is length with zero, only length */ \ |
| 1642 | 3 + /* version, opcount, opcode */ \ |
| 1643 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ |
| 1644 | /* seqid, slotID, slotID, cache */ \ |
| 1645 | 4 ) * sizeof(__be32)) |
| 1646 | |
| 1647 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ |
| 1648 | 2 + /* verifier: AUTH_NULL, length 0 */\ |
| 1649 | 1 + /* status */ \ |
| 1650 | 1 + /* MIN tag is length with zero, only length */ \ |
| 1651 | 3 + /* opcount, opcode, opstatus*/ \ |
| 1652 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ |
| 1653 | /* seqid, slotID, slotID, slotID, status */ \ |
| 1654 | 5 ) * sizeof(__be32)) |
| 1655 | |
| 1656 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) |
| 1657 | { |
| 1658 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ |
| 1659 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; |
| 1660 | } |
| 1661 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1662 | __be32 |
| 1663 | nfsd4_create_session(struct svc_rqst *rqstp, |
| 1664 | struct nfsd4_compound_state *cstate, |
| 1665 | struct nfsd4_create_session *cr_ses) |
| 1666 | { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1667 | struct sockaddr *sa = svc_addr(rqstp); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1668 | struct nfs4_client *conf, *unconf; |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 1669 | struct nfsd4_session *new; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1670 | struct nfsd4_clid_slot *cs_slot = NULL; |
J. Bruce Fields | 86c3e16 | 2010-10-02 17:04:00 -0400 | [diff] [blame] | 1671 | bool confirm_me = false; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1672 | int status = 0; |
| 1673 | |
Mi Jinlong | a62573d | 2011-03-23 17:57:07 +0800 | [diff] [blame] | 1674 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
| 1675 | return nfserr_inval; |
| 1676 | |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1677 | nfs4_lock_state(); |
| 1678 | unconf = find_unconfirmed_client(&cr_ses->clientid); |
| 1679 | conf = find_confirmed_client(&cr_ses->clientid); |
| 1680 | |
| 1681 | if (conf) { |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1682 | cs_slot = &conf->cl_cs_slot; |
| 1683 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1684 | if (status == nfserr_replay_cache) { |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1685 | dprintk("Got a create_session replay! seqid= %d\n", |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1686 | cs_slot->sl_seqid); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1687 | /* Return the cached reply status */ |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1688 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1689 | goto out; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1690 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1691 | status = nfserr_seq_misordered; |
| 1692 | dprintk("Sequence misordered!\n"); |
| 1693 | dprintk("Expected seqid= %d but got seqid= %d\n", |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1694 | cs_slot->sl_seqid, cr_ses->seqid); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1695 | goto out; |
| 1696 | } |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1697 | } else if (unconf) { |
| 1698 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 1699 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1700 | status = nfserr_clid_inuse; |
| 1701 | goto out; |
| 1702 | } |
| 1703 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1704 | cs_slot = &unconf->cl_cs_slot; |
| 1705 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); |
Andy Adamson | 38eb76a | 2009-04-03 08:28:32 +0300 | [diff] [blame] | 1706 | if (status) { |
| 1707 | /* an unconfirmed replay returns misordered */ |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1708 | status = nfserr_seq_misordered; |
J. Bruce Fields | cd5b814 | 2010-10-02 17:03:35 -0400 | [diff] [blame] | 1709 | goto out; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1710 | } |
| 1711 | |
J. Bruce Fields | 86c3e16 | 2010-10-02 17:04:00 -0400 | [diff] [blame] | 1712 | confirm_me = true; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1713 | conf = unconf; |
| 1714 | } else { |
| 1715 | status = nfserr_stale_clientid; |
| 1716 | goto out; |
| 1717 | } |
| 1718 | |
J. Bruce Fields | 408b79b | 2010-04-15 15:11:09 -0400 | [diff] [blame] | 1719 | /* |
J. Bruce Fields | 8323c3b | 2010-10-19 19:36:51 -0400 | [diff] [blame] | 1720 | * XXX: we should probably set this at creation time, and check |
| 1721 | * for consistent minorversion use throughout: |
| 1722 | */ |
| 1723 | conf->cl_minorversion = 1; |
| 1724 | /* |
J. Bruce Fields | 408b79b | 2010-04-15 15:11:09 -0400 | [diff] [blame] | 1725 | * We do not support RDMA or persistent sessions |
| 1726 | */ |
| 1727 | cr_ses->flags &= ~SESSION4_PERSIST; |
| 1728 | cr_ses->flags &= ~SESSION4_RDMA; |
| 1729 | |
Mi Jinlong | 1b74c25 | 2011-07-14 14:50:17 +0800 | [diff] [blame] | 1730 | status = nfserr_toosmall; |
| 1731 | if (check_forechannel_attrs(cr_ses->fore_channel)) |
| 1732 | goto out; |
| 1733 | |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 1734 | status = nfserr_jukebox; |
| 1735 | new = alloc_init_session(rqstp, conf, cr_ses); |
| 1736 | if (!new) |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1737 | goto out; |
J. Bruce Fields | ac7c46f | 2010-06-14 19:01:57 -0400 | [diff] [blame] | 1738 | status = nfs_ok; |
| 1739 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1740 | NFS4_MAX_SESSIONID_LEN); |
Mi Jinlong | 1205065 | 2010-11-11 18:03:40 +0800 | [diff] [blame] | 1741 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
| 1742 | sizeof(struct nfsd4_channel_attrs)); |
J. Bruce Fields | 86c3e16 | 2010-10-02 17:04:00 -0400 | [diff] [blame] | 1743 | cs_slot->sl_seqid++; |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1744 | cr_ses->seqid = cs_slot->sl_seqid; |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1745 | |
Andy Adamson | 49557cc | 2009-07-23 19:02:16 -0400 | [diff] [blame] | 1746 | /* cache solo and embedded create sessions under the state lock */ |
| 1747 | nfsd4_cache_create_session(cr_ses, cs_slot, status); |
J. Bruce Fields | 86c3e16 | 2010-10-02 17:04:00 -0400 | [diff] [blame] | 1748 | if (confirm_me) |
| 1749 | move_to_confirmed(conf); |
Andy Adamson | ec6b5d7 | 2009-04-03 08:28:28 +0300 | [diff] [blame] | 1750 | out: |
| 1751 | nfs4_unlock_state(); |
| 1752 | dprintk("%s returns %d\n", __func__, ntohl(status)); |
| 1753 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1754 | } |
| 1755 | |
J. Bruce Fields | 5771635 | 2010-04-21 12:27:19 -0400 | [diff] [blame] | 1756 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
| 1757 | { |
| 1758 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
| 1759 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; |
| 1760 | |
| 1761 | return argp->opcnt == resp->opcnt; |
| 1762 | } |
| 1763 | |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 1764 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
| 1765 | { |
| 1766 | switch (*dir) { |
| 1767 | case NFS4_CDFC4_FORE: |
| 1768 | case NFS4_CDFC4_BACK: |
| 1769 | return nfs_ok; |
| 1770 | case NFS4_CDFC4_FORE_OR_BOTH: |
| 1771 | case NFS4_CDFC4_BACK_OR_BOTH: |
| 1772 | *dir = NFS4_CDFC4_BOTH; |
| 1773 | return nfs_ok; |
| 1774 | }; |
| 1775 | return nfserr_inval; |
| 1776 | } |
| 1777 | |
| 1778 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, |
| 1779 | struct nfsd4_compound_state *cstate, |
| 1780 | struct nfsd4_bind_conn_to_session *bcts) |
| 1781 | { |
| 1782 | __be32 status; |
| 1783 | |
| 1784 | if (!nfsd4_last_compound_op(rqstp)) |
| 1785 | return nfserr_not_only_op; |
| 1786 | spin_lock(&client_lock); |
| 1787 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); |
| 1788 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires |
| 1789 | * client_lock iself: */ |
| 1790 | if (cstate->session) { |
| 1791 | nfsd4_get_session(cstate->session); |
| 1792 | atomic_inc(&cstate->session->se_client->cl_refcount); |
| 1793 | } |
| 1794 | spin_unlock(&client_lock); |
| 1795 | if (!cstate->session) |
| 1796 | return nfserr_badsession; |
| 1797 | |
| 1798 | status = nfsd4_map_bcts_dir(&bcts->dir); |
Bryan Schumaker | 1db2b9d | 2011-04-27 15:47:15 -0400 | [diff] [blame] | 1799 | if (!status) |
| 1800 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); |
| 1801 | return status; |
J. Bruce Fields | 1d1bc8f | 2010-10-04 23:12:59 -0400 | [diff] [blame] | 1802 | } |
| 1803 | |
J. Bruce Fields | 5d4cec2 | 2010-05-01 12:56:06 -0400 | [diff] [blame] | 1804 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
| 1805 | { |
| 1806 | if (!session) |
| 1807 | return 0; |
| 1808 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); |
| 1809 | } |
| 1810 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1811 | __be32 |
| 1812 | nfsd4_destroy_session(struct svc_rqst *r, |
| 1813 | struct nfsd4_compound_state *cstate, |
| 1814 | struct nfsd4_destroy_session *sessionid) |
| 1815 | { |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1816 | struct nfsd4_session *ses; |
| 1817 | u32 status = nfserr_badsession; |
| 1818 | |
| 1819 | /* Notes: |
| 1820 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid |
| 1821 | * - Should we return nfserr_back_chan_busy if waiting for |
| 1822 | * callbacks on to-be-destroyed session? |
| 1823 | * - Do we need to clear any callback info from previous session? |
| 1824 | */ |
| 1825 | |
J. Bruce Fields | 5d4cec2 | 2010-05-01 12:56:06 -0400 | [diff] [blame] | 1826 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
J. Bruce Fields | 5771635 | 2010-04-21 12:27:19 -0400 | [diff] [blame] | 1827 | if (!nfsd4_last_compound_op(r)) |
| 1828 | return nfserr_not_only_op; |
| 1829 | } |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1830 | dump_sessionid(__func__, &sessionid->sessionid); |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 1831 | spin_lock(&client_lock); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1832 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
| 1833 | if (!ses) { |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 1834 | spin_unlock(&client_lock); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1835 | goto out; |
| 1836 | } |
| 1837 | |
| 1838 | unhash_session(ses); |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 1839 | spin_unlock(&client_lock); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1840 | |
Benny Halevy | ab707e1 | 2010-05-12 00:14:06 +0300 | [diff] [blame] | 1841 | nfs4_lock_state(); |
J. Bruce Fields | 84f5f7c | 2010-12-09 15:52:19 -0500 | [diff] [blame] | 1842 | nfsd4_probe_callback_sync(ses->se_client); |
Benny Halevy | ab707e1 | 2010-05-12 00:14:06 +0300 | [diff] [blame] | 1843 | nfs4_unlock_state(); |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 1844 | |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 1845 | spin_lock(&client_lock); |
J. Bruce Fields | 19cf5c0 | 2010-06-06 18:37:16 -0400 | [diff] [blame] | 1846 | nfsd4_del_conns(ses); |
Benny Halevy | 508dc6e | 2012-02-23 17:40:52 -0800 | [diff] [blame] | 1847 | nfsd4_put_session_locked(ses); |
| 1848 | spin_unlock(&client_lock); |
Benny Halevy | e10e0cf | 2009-04-03 08:28:38 +0300 | [diff] [blame] | 1849 | status = nfs_ok; |
| 1850 | out: |
| 1851 | dprintk("%s returns %d\n", __func__, ntohl(status)); |
| 1852 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1853 | } |
| 1854 | |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 1855 | 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] | 1856 | { |
| 1857 | struct nfsd4_conn *c; |
| 1858 | |
| 1859 | list_for_each_entry(c, &s->se_conns, cn_persession) { |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 1860 | if (c->cn_xprt == xpt) { |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 1861 | return c; |
| 1862 | } |
| 1863 | } |
| 1864 | return NULL; |
| 1865 | } |
| 1866 | |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 1867 | 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] | 1868 | { |
| 1869 | struct nfs4_client *clp = ses->se_client; |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 1870 | struct nfsd4_conn *c; |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 1871 | int ret; |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 1872 | |
| 1873 | spin_lock(&clp->cl_lock); |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 1874 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 1875 | if (c) { |
| 1876 | spin_unlock(&clp->cl_lock); |
| 1877 | free_conn(new); |
| 1878 | return; |
| 1879 | } |
| 1880 | __nfsd4_hash_conn(new, ses); |
| 1881 | spin_unlock(&clp->cl_lock); |
J. Bruce Fields | 21b75b0 | 2010-10-26 10:07:17 -0400 | [diff] [blame] | 1882 | ret = nfsd4_register_conn(new); |
| 1883 | if (ret) |
| 1884 | /* oops; xprt is already down: */ |
| 1885 | nfsd4_conn_lost(&new->cn_xpt_user); |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 1886 | return; |
| 1887 | } |
| 1888 | |
Mi Jinlong | 868b89c | 2011-04-27 09:09:58 +0800 | [diff] [blame] | 1889 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
| 1890 | { |
| 1891 | struct nfsd4_compoundargs *args = rqstp->rq_argp; |
| 1892 | |
| 1893 | return args->opcnt > session->se_fchannel.maxops; |
| 1894 | } |
| 1895 | |
Mi Jinlong | ae82a8d | 2011-07-14 14:56:02 +0800 | [diff] [blame] | 1896 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
| 1897 | struct nfsd4_session *session) |
| 1898 | { |
| 1899 | struct xdr_buf *xb = &rqstp->rq_arg; |
| 1900 | |
| 1901 | return xb->len > session->se_fchannel.maxreq_sz; |
| 1902 | } |
| 1903 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1904 | __be32 |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1905 | nfsd4_sequence(struct svc_rqst *rqstp, |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 1906 | struct nfsd4_compound_state *cstate, |
| 1907 | struct nfsd4_sequence *seq) |
| 1908 | { |
Andy Adamson | f9bb94c | 2009-04-03 08:28:12 +0300 | [diff] [blame] | 1909 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1910 | struct nfsd4_session *session; |
| 1911 | struct nfsd4_slot *slot; |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 1912 | struct nfsd4_conn *conn; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1913 | int status; |
| 1914 | |
Andy Adamson | f9bb94c | 2009-04-03 08:28:12 +0300 | [diff] [blame] | 1915 | if (resp->opcnt != 1) |
| 1916 | return nfserr_sequence_pos; |
| 1917 | |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 1918 | /* |
| 1919 | * Will be either used or freed by nfsd4_sequence_check_conn |
| 1920 | * below. |
| 1921 | */ |
| 1922 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); |
| 1923 | if (!conn) |
| 1924 | return nfserr_jukebox; |
| 1925 | |
Benny Halevy | 9089f1b | 2010-05-12 00:12:26 +0300 | [diff] [blame] | 1926 | spin_lock(&client_lock); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1927 | status = nfserr_badsession; |
| 1928 | session = find_in_sessionid_hashtbl(&seq->sessionid); |
| 1929 | if (!session) |
| 1930 | goto out; |
| 1931 | |
Mi Jinlong | 868b89c | 2011-04-27 09:09:58 +0800 | [diff] [blame] | 1932 | status = nfserr_too_many_ops; |
| 1933 | if (nfsd4_session_too_many_ops(rqstp, session)) |
| 1934 | goto out; |
| 1935 | |
Mi Jinlong | ae82a8d | 2011-07-14 14:56:02 +0800 | [diff] [blame] | 1936 | status = nfserr_req_too_big; |
| 1937 | if (nfsd4_request_too_big(rqstp, session)) |
| 1938 | goto out; |
| 1939 | |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1940 | status = nfserr_badslot; |
Alexandros Batsakis | 6c18ba9 | 2009-06-16 04:19:13 +0300 | [diff] [blame] | 1941 | if (seq->slotid >= session->se_fchannel.maxreqs) |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1942 | goto out; |
| 1943 | |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1944 | slot = session->se_slots[seq->slotid]; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1945 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
| 1946 | |
Andy Adamson | a8dfdae | 2009-08-28 08:45:02 -0400 | [diff] [blame] | 1947 | /* We do not negotiate the number of slots yet, so set the |
| 1948 | * maxslots to the session maxreqs which is used to encode |
| 1949 | * sr_highest_slotid and the sr_target_slot id to maxslots */ |
| 1950 | seq->maxslots = session->se_fchannel.maxreqs; |
| 1951 | |
J. Bruce Fields | 73e7948 | 2012-02-13 16:39:00 -0500 | [diff] [blame] | 1952 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, |
| 1953 | slot->sl_flags & NFSD4_SLOT_INUSE); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1954 | if (status == nfserr_replay_cache) { |
J. Bruce Fields | bf5c43c | 2012-02-13 16:56:19 -0500 | [diff] [blame] | 1955 | status = nfserr_seq_misordered; |
| 1956 | if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) |
| 1957 | goto out; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1958 | cstate->slot = slot; |
| 1959 | cstate->session = session; |
Andy Adamson | da3846a | 2009-04-03 08:28:22 +0300 | [diff] [blame] | 1960 | /* Return the cached reply status and set cstate->status |
Andy Adamson | 557ce26 | 2009-08-28 08:45:04 -0400 | [diff] [blame] | 1961 | * for nfsd4_proc_compound processing */ |
Andy Adamson | bf864a3 | 2009-04-03 08:28:35 +0300 | [diff] [blame] | 1962 | status = nfsd4_replay_cache_entry(resp, seq); |
Andy Adamson | da3846a | 2009-04-03 08:28:22 +0300 | [diff] [blame] | 1963 | cstate->status = nfserr_replay_cache; |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 1964 | goto out; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1965 | } |
| 1966 | if (status) |
| 1967 | goto out; |
| 1968 | |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 1969 | nfsd4_sequence_check_conn(conn, session); |
| 1970 | conn = NULL; |
J. Bruce Fields | 328ead2 | 2010-09-29 16:11:06 -0400 | [diff] [blame] | 1971 | |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1972 | /* Success! bump slot seqid */ |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1973 | slot->sl_seqid = seq->seqid; |
J. Bruce Fields | bf5c43c | 2012-02-13 16:56:19 -0500 | [diff] [blame] | 1974 | slot->sl_flags |= NFSD4_SLOT_INUSE; |
J. Bruce Fields | 73e7948 | 2012-02-13 16:39:00 -0500 | [diff] [blame] | 1975 | if (seq->cachethis) |
| 1976 | slot->sl_flags |= NFSD4_SLOT_CACHETHIS; |
J. Bruce Fields | bf5c43c | 2012-02-13 16:56:19 -0500 | [diff] [blame] | 1977 | else |
| 1978 | slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1979 | |
| 1980 | cstate->slot = slot; |
| 1981 | cstate->session = session; |
| 1982 | |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 1983 | out: |
J. Bruce Fields | 26c0c75 | 2010-04-24 15:35:43 -0400 | [diff] [blame] | 1984 | /* Hold a session reference until done processing the compound. */ |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 1985 | if (cstate->session) { |
J. Bruce Fields | 0d7bb71 | 2010-11-18 08:30:33 -0500 | [diff] [blame] | 1986 | struct nfs4_client *clp = session->se_client; |
| 1987 | |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 1988 | nfsd4_get_session(cstate->session); |
J. Bruce Fields | 0d7bb71 | 2010-11-18 08:30:33 -0500 | [diff] [blame] | 1989 | atomic_inc(&clp->cl_refcount); |
Benny Halevy | 5423732 | 2011-10-19 19:12:58 -0700 | [diff] [blame] | 1990 | switch (clp->cl_cb_state) { |
| 1991 | case NFSD4_CB_DOWN: |
Benny Halevy | fc0c3dd | 2011-10-19 19:13:06 -0700 | [diff] [blame] | 1992 | seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; |
Benny Halevy | 5423732 | 2011-10-19 19:12:58 -0700 | [diff] [blame] | 1993 | break; |
| 1994 | case NFSD4_CB_FAULT: |
Benny Halevy | fc0c3dd | 2011-10-19 19:13:06 -0700 | [diff] [blame] | 1995 | seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; |
Benny Halevy | 5423732 | 2011-10-19 19:12:58 -0700 | [diff] [blame] | 1996 | break; |
Benny Halevy | fc0c3dd | 2011-10-19 19:13:06 -0700 | [diff] [blame] | 1997 | default: |
| 1998 | seq->status_flags = 0; |
Benny Halevy | 5423732 | 2011-10-19 19:12:58 -0700 | [diff] [blame] | 1999 | } |
Benny Halevy | aaf84eb | 2009-08-20 03:21:56 +0300 | [diff] [blame] | 2000 | } |
J. Bruce Fields | a663bdd | 2010-10-21 17:17:31 -0400 | [diff] [blame] | 2001 | kfree(conn); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 2002 | spin_unlock(&client_lock); |
Benny Halevy | b85d4c0 | 2009-04-03 08:28:08 +0300 | [diff] [blame] | 2003 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
| 2004 | return status; |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2005 | } |
| 2006 | |
Mi Jinlong | 345c284 | 2011-10-20 17:51:39 +0800 | [diff] [blame] | 2007 | static inline bool has_resources(struct nfs4_client *clp) |
| 2008 | { |
| 2009 | return !list_empty(&clp->cl_openowners) |
| 2010 | || !list_empty(&clp->cl_delegations) |
| 2011 | || !list_empty(&clp->cl_sessions); |
| 2012 | } |
| 2013 | |
| 2014 | __be32 |
| 2015 | nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) |
| 2016 | { |
| 2017 | struct nfs4_client *conf, *unconf, *clp; |
| 2018 | int status = 0; |
| 2019 | |
| 2020 | nfs4_lock_state(); |
| 2021 | unconf = find_unconfirmed_client(&dc->clientid); |
| 2022 | conf = find_confirmed_client(&dc->clientid); |
| 2023 | |
| 2024 | if (conf) { |
| 2025 | clp = conf; |
| 2026 | |
| 2027 | if (!is_client_expired(conf) && has_resources(conf)) { |
| 2028 | status = nfserr_clientid_busy; |
| 2029 | goto out; |
| 2030 | } |
| 2031 | |
| 2032 | /* rfc5661 18.50.3 */ |
| 2033 | if (cstate->session && conf == cstate->session->se_client) { |
| 2034 | status = nfserr_clientid_busy; |
| 2035 | goto out; |
| 2036 | } |
| 2037 | } else if (unconf) |
| 2038 | clp = unconf; |
| 2039 | else { |
| 2040 | status = nfserr_stale_clientid; |
| 2041 | goto out; |
| 2042 | } |
| 2043 | |
| 2044 | expire_client(clp); |
| 2045 | out: |
| 2046 | nfs4_unlock_state(); |
| 2047 | dprintk("%s return %d\n", __func__, ntohl(status)); |
| 2048 | return status; |
| 2049 | } |
| 2050 | |
Andy Adamson | 069b6ad | 2009-04-03 08:27:58 +0300 | [diff] [blame] | 2051 | __be32 |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 2052 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) |
| 2053 | { |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2054 | int status = 0; |
| 2055 | |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 2056 | if (rc->rca_one_fs) { |
| 2057 | if (!cstate->current_fh.fh_dentry) |
| 2058 | return nfserr_nofilehandle; |
| 2059 | /* |
| 2060 | * We don't take advantage of the rca_one_fs case. |
| 2061 | * That's OK, it's optional, we can safely ignore it. |
| 2062 | */ |
| 2063 | return nfs_ok; |
| 2064 | } |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2065 | |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 2066 | nfs4_lock_state(); |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2067 | status = nfserr_complete_already; |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 2068 | if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, |
| 2069 | &cstate->session->se_client->cl_flags)) |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2070 | goto out; |
| 2071 | |
| 2072 | status = nfserr_stale_clientid; |
| 2073 | if (is_client_expired(cstate->session->se_client)) |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 2074 | /* |
| 2075 | * The following error isn't really legal. |
| 2076 | * But we only get here if the client just explicitly |
| 2077 | * destroyed the client. Surely it no longer cares what |
| 2078 | * error it gets back on an operation for the dead |
| 2079 | * client. |
| 2080 | */ |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2081 | goto out; |
| 2082 | |
| 2083 | status = nfs_ok; |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 2084 | nfsd4_client_record_create(cstate->session->se_client); |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2085 | out: |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 2086 | nfs4_unlock_state(); |
Mi Jinlong | bcecf1c | 2011-04-27 09:14:30 +0800 | [diff] [blame] | 2087 | return status; |
J. Bruce Fields | 4dc6ec0 | 2010-04-19 15:11:28 -0400 | [diff] [blame] | 2088 | } |
| 2089 | |
| 2090 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 2091 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 2092 | struct nfsd4_setclientid *setclid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2093 | { |
J. Bruce Fields | a084daf | 2011-10-10 15:07:40 -0400 | [diff] [blame] | 2094 | struct xdr_netobj clname = setclid->se_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2095 | nfs4_verifier clverifier = setclid->se_verf; |
| 2096 | unsigned int strhashval; |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 2097 | struct nfs4_client *conf, *unconf, *new; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2098 | __be32 status; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 2099 | char dname[HEXDIR_LEN]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2100 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 2101 | status = nfs4_make_rec_clidname(dname, &clname); |
| 2102 | if (status) |
Neil Brown | 73aea4e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 2103 | return status; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 2104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | /* |
| 2106 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 2107 | * We get here on a DRC miss. |
| 2108 | */ |
| 2109 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 2110 | strhashval = clientstr_hashval(dname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | nfs4_lock_state(); |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 2113 | conf = find_confirmed_client_by_str(dname, strhashval); |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 2114 | if (conf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2115 | /* RFC 3530 14.2.33 CASE 0: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2116 | status = nfserr_clid_inuse; |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 2117 | if (clp_used_exchangeid(conf)) |
| 2118 | goto out; |
J. Bruce Fields | 026722c | 2009-03-18 15:06:26 -0400 | [diff] [blame] | 2119 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 2120 | char addr_str[INET6_ADDRSTRLEN]; |
| 2121 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, |
| 2122 | sizeof(addr_str)); |
| 2123 | dprintk("NFSD: setclientid: string in use by client " |
| 2124 | "at %s\n", addr_str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2125 | goto out; |
| 2126 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2127 | } |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2128 | /* |
| 2129 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") |
| 2130 | * has a description of SETCLIENTID request processing consisting |
| 2131 | * of 5 bullet points, labeled as CASE0 - CASE4 below. |
| 2132 | */ |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 2133 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
J. Bruce Fields | 3e77246 | 2011-08-10 19:07:33 -0400 | [diff] [blame] | 2134 | status = nfserr_jukebox; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | if (!conf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2136 | /* |
| 2137 | * RFC 3530 14.2.33 CASE 4: |
| 2138 | * placed first, because it is the normal case |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | */ |
| 2140 | if (unconf) |
| 2141 | expire_client(unconf); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 2142 | new = create_client(clname, dname, rqstp, &clverifier); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 2143 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2144 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | gen_clid(new); |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2146 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2148 | * RFC 3530 14.2.33 CASE 1: |
| 2149 | * probable callback update |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2150 | */ |
NeilBrown | 31f4a6c | 2005-06-23 22:04:06 -0700 | [diff] [blame] | 2151 | if (unconf) { |
| 2152 | /* Note this is removing unconfirmed {*x***}, |
| 2153 | * which is stronger than RFC recommended {vxc**}. |
| 2154 | * This has the advantage that there is at most |
| 2155 | * one {*x***} in either list at any time. |
| 2156 | */ |
| 2157 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | } |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 2159 | new = create_client(clname, dname, rqstp, &clverifier); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 2160 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2162 | copy_clid(new, conf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | } else if (!unconf) { |
| 2164 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2165 | * RFC 3530 14.2.33 CASE 2: |
| 2166 | * probable client reboot; state will be removed if |
| 2167 | * confirmed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2168 | */ |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 2169 | new = create_client(clname, dname, rqstp, &clverifier); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 2170 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2171 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2172 | gen_clid(new); |
J. Bruce Fields | 49ba878 | 2007-11-19 19:09:50 -0500 | [diff] [blame] | 2173 | } else { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2174 | /* |
| 2175 | * RFC 3530 14.2.33 CASE 3: |
| 2176 | * probable client reboot; state will be removed if |
| 2177 | * confirmed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | */ |
| 2179 | expire_client(unconf); |
Ricardo Labiaga | b09333c | 2009-09-10 12:27:34 +0300 | [diff] [blame] | 2180 | new = create_client(clname, dname, rqstp, &clverifier); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 2181 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2182 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | gen_clid(new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2184 | } |
J. Bruce Fields | 8323c3b | 2010-10-19 19:36:51 -0400 | [diff] [blame] | 2185 | /* |
| 2186 | * XXX: we should probably set this at creation time, and check |
| 2187 | * for consistent minorversion use throughout: |
| 2188 | */ |
| 2189 | new->cl_minorversion = 0; |
Takuma Umeya | 6f3d772 | 2010-12-15 14:09:01 +0900 | [diff] [blame] | 2190 | gen_callback(new, setclid, rqstp); |
J. Bruce Fields | c175b83 | 2007-08-09 18:34:32 -0400 | [diff] [blame] | 2191 | add_to_unconfirmed(new, strhashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2192 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
| 2193 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; |
| 2194 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); |
| 2195 | status = nfs_ok; |
| 2196 | out: |
| 2197 | nfs4_unlock_state(); |
| 2198 | return status; |
| 2199 | } |
| 2200 | |
| 2201 | |
| 2202 | /* |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2203 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
| 2204 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 |
| 2205 | * bullets, labeled as CASE1 - CASE4 below. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2206 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2207 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 2208 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
| 2209 | struct nfsd4_compound_state *cstate, |
| 2210 | struct nfsd4_setclientid_confirm *setclientid_confirm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | { |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 2212 | struct sockaddr *sa = svc_addr(rqstp); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 2213 | struct nfs4_client *conf, *unconf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2214 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
| 2215 | clientid_t * clid = &setclientid_confirm->sc_clientid; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2216 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2217 | |
| 2218 | if (STALE_CLIENTID(clid)) |
| 2219 | return nfserr_stale_clientid; |
| 2220 | /* |
| 2221 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 2222 | * We get here on a DRC miss. |
| 2223 | */ |
| 2224 | |
| 2225 | nfs4_lock_state(); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 2226 | |
| 2227 | conf = find_confirmed_client(clid); |
| 2228 | unconf = find_unconfirmed_client(clid); |
| 2229 | |
| 2230 | status = nfserr_clid_inuse; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 2231 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 2232 | goto out; |
Jeff Layton | 363168b | 2009-08-14 12:57:56 -0400 | [diff] [blame] | 2233 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 2234 | goto out; |
| 2235 | |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2236 | /* |
| 2237 | * section 14.2.34 of RFC 3530 has a description of |
| 2238 | * SETCLIENTID_CONFIRM request processing consisting |
| 2239 | * of 4 bullet points, labeled as CASE1 - CASE4 below. |
| 2240 | */ |
J. Bruce Fields | 366e0c1 | 2007-11-20 15:54:10 -0500 | [diff] [blame] | 2241 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2242 | /* |
| 2243 | * RFC 3530 14.2.34 CASE 1: |
| 2244 | * callback update |
| 2245 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2246 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2247 | status = nfserr_clid_inuse; |
| 2248 | else { |
J. Bruce Fields | 5a3c9d7 | 2010-10-19 17:56:52 -0400 | [diff] [blame] | 2249 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
| 2250 | nfsd4_probe_callback(conf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 2251 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | status = nfs_ok; |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 2253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | } |
J. Bruce Fields | f3aba4e | 2007-11-20 16:52:07 -0500 | [diff] [blame] | 2255 | } else if (conf && !unconf) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2256 | /* |
| 2257 | * RFC 3530 14.2.34 CASE 2: |
| 2258 | * probable retransmitted request; play it safe and |
| 2259 | * do nothing. |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 2260 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2261 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | status = nfserr_clid_inuse; |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 2263 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2264 | status = nfs_ok; |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 2265 | } else if (!conf && unconf |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2266 | && same_verf(&unconf->cl_confirm, &confirm)) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2267 | /* |
| 2268 | * RFC 3530 14.2.34 CASE 3: |
| 2269 | * Normal case; new or rebooted client: |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 2270 | */ |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2271 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | status = nfserr_clid_inuse; |
| 2273 | } else { |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 2274 | unsigned int hash = |
| 2275 | clientstr_hashval(unconf->cl_recdir); |
| 2276 | conf = find_confirmed_client_by_str(unconf->cl_recdir, |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 2277 | hash); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 2278 | if (conf) { |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 2279 | nfsd4_client_record_remove(conf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 2280 | expire_client(conf); |
| 2281 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2282 | move_to_confirmed(unconf); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 2283 | conf = unconf; |
J. Bruce Fields | 5a3c9d7 | 2010-10-19 17:56:52 -0400 | [diff] [blame] | 2284 | nfsd4_probe_callback(conf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 2285 | status = nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2286 | } |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2287 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
| 2288 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 2289 | &confirm)))) { |
J. Bruce Fields | a186e76 | 2007-11-20 16:11:27 -0500 | [diff] [blame] | 2290 | /* |
| 2291 | * RFC 3530 14.2.34 CASE 4: |
| 2292 | * Client probably hasn't noticed that we rebooted yet. |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 2293 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2294 | status = nfserr_stale_clientid; |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 2295 | } else { |
NeilBrown | 08e8987 | 2005-06-23 22:04:11 -0700 | [diff] [blame] | 2296 | /* check that we have hit one of the cases...*/ |
| 2297 | status = nfserr_clid_inuse; |
| 2298 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2299 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2300 | nfs4_unlock_state(); |
| 2301 | return status; |
| 2302 | } |
| 2303 | |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 2304 | static struct nfs4_file *nfsd4_alloc_file(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2305 | { |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 2306 | return kmem_cache_alloc(file_slab, GFP_KERNEL); |
| 2307 | } |
| 2308 | |
| 2309 | /* OPEN Share state helper functions */ |
| 2310 | static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) |
| 2311 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2312 | unsigned int hashval = file_hashval(ino); |
| 2313 | |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 2314 | atomic_set(&fp->fi_ref, 1); |
| 2315 | INIT_LIST_HEAD(&fp->fi_hash); |
| 2316 | INIT_LIST_HEAD(&fp->fi_stateids); |
| 2317 | INIT_LIST_HEAD(&fp->fi_delegations); |
| 2318 | fp->fi_inode = igrab(ino); |
| 2319 | fp->fi_had_conflict = false; |
| 2320 | fp->fi_lease = NULL; |
| 2321 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
| 2322 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); |
| 2323 | spin_lock(&recall_lock); |
| 2324 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
| 2325 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2326 | } |
| 2327 | |
| 2328 | static void |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 2329 | nfsd4_free_slab(struct kmem_cache **slab) |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2330 | { |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2331 | if (*slab == NULL) |
| 2332 | return; |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 2333 | kmem_cache_destroy(*slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2334 | *slab = NULL; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2335 | } |
| 2336 | |
J. Bruce Fields | e8ff2a8 | 2007-08-01 15:30:59 -0400 | [diff] [blame] | 2337 | void |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2338 | nfsd4_free_slabs(void) |
| 2339 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2340 | nfsd4_free_slab(&openowner_slab); |
| 2341 | nfsd4_free_slab(&lockowner_slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2342 | nfsd4_free_slab(&file_slab); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2343 | nfsd4_free_slab(&stateid_slab); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 2344 | nfsd4_free_slab(&deleg_slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2345 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | |
Bryan Schumaker | 7208339 | 2011-11-01 15:24:59 -0400 | [diff] [blame] | 2347 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2348 | nfsd4_init_slabs(void) |
| 2349 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2350 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
| 2351 | sizeof(struct nfs4_openowner), 0, 0, NULL); |
| 2352 | if (openowner_slab == NULL) |
| 2353 | goto out_nomem; |
| 2354 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", |
Yanchuan Nian | 17df6a6 | 2012-10-24 14:44:19 +0800 | [diff] [blame] | 2355 | sizeof(struct nfs4_lockowner), 0, 0, NULL); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2356 | if (lockowner_slab == NULL) |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2357 | goto out_nomem; |
| 2358 | file_slab = kmem_cache_create("nfsd4_files", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 2359 | sizeof(struct nfs4_file), 0, 0, NULL); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2360 | if (file_slab == NULL) |
| 2361 | goto out_nomem; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2362 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 2363 | sizeof(struct nfs4_ol_stateid), 0, 0, NULL); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2364 | if (stateid_slab == NULL) |
| 2365 | goto out_nomem; |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 2366 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 2367 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 2368 | if (deleg_slab == NULL) |
| 2369 | goto out_nomem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2370 | return 0; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 2371 | out_nomem: |
| 2372 | nfsd4_free_slabs(); |
| 2373 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
| 2374 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2375 | } |
| 2376 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2377 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2378 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2379 | kfree(oo->oo_owner.so_owner.data); |
| 2380 | kmem_cache_free(openowner_slab, oo); |
| 2381 | } |
| 2382 | |
| 2383 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) |
| 2384 | { |
| 2385 | kfree(lo->lo_owner.so_owner.data); |
| 2386 | kmem_cache_free(lockowner_slab, lo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2387 | } |
| 2388 | |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 2389 | static void init_nfs4_replay(struct nfs4_replay *rp) |
| 2390 | { |
| 2391 | rp->rp_status = nfserr_serverfault; |
| 2392 | rp->rp_buflen = 0; |
| 2393 | rp->rp_buf = rp->rp_ibuf; |
| 2394 | } |
| 2395 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2396 | 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] | 2397 | { |
| 2398 | struct nfs4_stateowner *sop; |
| 2399 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2400 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 2401 | if (!sop) |
| 2402 | return NULL; |
| 2403 | |
| 2404 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); |
| 2405 | if (!sop->so_owner.data) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2406 | kmem_cache_free(slab, sop); |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 2407 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2408 | } |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 2409 | sop->so_owner.len = owner->len; |
| 2410 | |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 2411 | INIT_LIST_HEAD(&sop->so_stateids); |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 2412 | sop->so_client = clp; |
| 2413 | init_nfs4_replay(&sop->so_replay); |
| 2414 | return sop; |
| 2415 | } |
| 2416 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2417 | 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] | 2418 | { |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 2419 | list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2420 | list_add(&oo->oo_perclient, &clp->cl_openowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2421 | } |
| 2422 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2423 | static struct nfs4_openowner * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2424 | 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] | 2425 | struct nfs4_openowner *oo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2426 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2427 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
| 2428 | if (!oo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | return NULL; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2430 | oo->oo_owner.so_is_open_owner = 1; |
| 2431 | oo->oo_owner.so_seqid = open->op_seqid; |
J. Bruce Fields | d29b20c | 2011-10-13 15:12:59 -0400 | [diff] [blame] | 2432 | oo->oo_flags = NFS4_OO_NEW; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2433 | oo->oo_time = 0; |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 2434 | oo->oo_last_closed_stid = NULL; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2435 | INIT_LIST_HEAD(&oo->oo_close_lru); |
| 2436 | hash_openowner(oo, clp, strhashval); |
| 2437 | return oo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2438 | } |
| 2439 | |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 2440 | 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] | 2441 | struct nfs4_openowner *oo = open->op_openowner; |
J. Bruce Fields | d3b313a | 2011-09-15 15:02:41 -0400 | [diff] [blame] | 2442 | struct nfs4_client *clp = oo->oo_owner.so_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2443 | |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 2444 | init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2445 | INIT_LIST_HEAD(&stp->st_lockowners); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2446 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 2447 | list_add(&stp->st_perfile, &fp->fi_stateids); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2448 | stp->st_stateowner = &oo->oo_owner; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2449 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2450 | stp->st_file = fp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2451 | stp->st_access_bmap = 0; |
| 2452 | stp->st_deny_bmap = 0; |
J. Bruce Fields | b6d2f1c | 2011-10-10 17:44:19 -0400 | [diff] [blame] | 2453 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2454 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2455 | stp->st_openstp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2456 | } |
| 2457 | |
| 2458 | static void |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2459 | move_to_close_lru(struct nfs4_openowner *oo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2460 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2461 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2462 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2463 | list_move_tail(&oo->oo_close_lru, &close_lru); |
| 2464 | oo->oo_time = get_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2465 | } |
| 2466 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2467 | static int |
J. Bruce Fields | 599e0a2 | 2007-07-26 17:04:54 -0400 | [diff] [blame] | 2468 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
| 2469 | clientid_t *clid) |
| 2470 | { |
| 2471 | return (sop->so_owner.len == owner->len) && |
| 2472 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && |
| 2473 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2474 | } |
| 2475 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2476 | static struct nfs4_openowner * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2477 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
| 2478 | { |
J. Bruce Fields | a50d2ad | 2011-10-12 16:24:27 -0400 | [diff] [blame] | 2479 | struct nfs4_stateowner *so; |
| 2480 | struct nfs4_openowner *oo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2481 | |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 2482 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
| 2483 | if (!so->so_is_open_owner) |
| 2484 | continue; |
J. Bruce Fields | a50d2ad | 2011-10-12 16:24:27 -0400 | [diff] [blame] | 2485 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { |
| 2486 | oo = openowner(so); |
| 2487 | renew_client(oo->oo_owner.so_client); |
| 2488 | return oo; |
| 2489 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2490 | } |
| 2491 | return NULL; |
| 2492 | } |
| 2493 | |
| 2494 | /* search file_hashtbl[] for file */ |
| 2495 | static struct nfs4_file * |
| 2496 | find_file(struct inode *ino) |
| 2497 | { |
| 2498 | unsigned int hashval = file_hashval(ino); |
| 2499 | struct nfs4_file *fp; |
| 2500 | |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 2501 | spin_lock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2502 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2503 | if (fp->fi_inode == ino) { |
| 2504 | get_nfs4_file(fp); |
J. Bruce Fields | 8b671b8 | 2009-02-22 14:51:34 -0800 | [diff] [blame] | 2505 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2506 | return fp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2507 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2508 | } |
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 NULL; |
| 2511 | } |
| 2512 | |
J. Bruce Fields | 4f83aa3 | 2008-07-07 15:02:02 -0400 | [diff] [blame] | 2513 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2514 | * Called to check deny when READ with all zero stateid or |
| 2515 | * WRITE with all zero or all one stateid |
| 2516 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2517 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2518 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
| 2519 | { |
| 2520 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 2521 | struct nfs4_file *fp; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 2522 | struct nfs4_ol_stateid *stp; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2523 | __be32 ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2524 | |
| 2525 | dprintk("NFSD: nfs4_share_conflict\n"); |
| 2526 | |
| 2527 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2528 | if (!fp) |
| 2529 | return nfs_ok; |
NeilBrown | b700949 | 2005-07-07 17:59:23 -0700 | [diff] [blame] | 2530 | ret = nfserr_locked; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2531 | /* Search for conflicting share reservations */ |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2532 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
| 2533 | if (test_bit(deny_type, &stp->st_deny_bmap) || |
| 2534 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) |
| 2535 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2536 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2537 | ret = nfs_ok; |
| 2538 | out: |
| 2539 | put_nfs4_file(fp); |
| 2540 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2541 | } |
| 2542 | |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 2543 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2544 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | /* We're assuming the state code never drops its reference |
| 2546 | * without first removing the lease. Since we're in this lease |
| 2547 | * callback (and since the lease code is serialized by the kernel |
| 2548 | * lock) we know the server hasn't removed the lease yet, we know |
| 2549 | * it's safe to take a reference: */ |
| 2550 | atomic_inc(&dp->dl_count); |
| 2551 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2553 | |
Arnd Bergmann | 460781b | 2010-11-17 16:26:56 +0100 | [diff] [blame] | 2554 | /* only place dl_time is set. protected by lock_flocks*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2555 | dp->dl_time = get_seconds(); |
| 2556 | |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 2557 | nfsd4_cb_recall(dp); |
| 2558 | } |
| 2559 | |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2560 | /* Called from break_lease() with lock_flocks() held. */ |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 2561 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
| 2562 | { |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2563 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
| 2564 | struct nfs4_delegation *dp; |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 2565 | |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2566 | BUG_ON(!fp); |
| 2567 | /* We assume break_lease is only called once per lease: */ |
| 2568 | BUG_ON(fp->fi_had_conflict); |
J. Bruce Fields | 0272e1f | 2007-09-12 18:56:12 -0400 | [diff] [blame] | 2569 | /* |
| 2570 | * 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] | 2571 | * we'll remove it ourself if a delegation isn't returned |
J. Bruce Fields | 6b57d9c | 2011-01-31 11:54:04 -0500 | [diff] [blame] | 2572 | * in time: |
J. Bruce Fields | 0272e1f | 2007-09-12 18:56:12 -0400 | [diff] [blame] | 2573 | */ |
| 2574 | fl->fl_break_time = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | |
J. Bruce Fields | 5d926e8 | 2011-02-07 16:53:46 -0500 | [diff] [blame] | 2576 | spin_lock(&recall_lock); |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2577 | fp->fi_had_conflict = true; |
| 2578 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) |
| 2579 | nfsd_break_one_deleg(dp); |
J. Bruce Fields | 5d926e8 | 2011-02-07 16:53:46 -0500 | [diff] [blame] | 2580 | spin_unlock(&recall_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2581 | } |
| 2582 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2583 | static |
| 2584 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) |
| 2585 | { |
| 2586 | if (arg & F_UNLCK) |
| 2587 | return lease_modify(onlist, arg); |
| 2588 | else |
| 2589 | return -EAGAIN; |
| 2590 | } |
| 2591 | |
Alexey Dobriyan | 7b02196 | 2009-09-21 17:01:12 -0700 | [diff] [blame] | 2592 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
J. Bruce Fields | 8fb47a4 | 2011-07-20 20:21:59 -0400 | [diff] [blame] | 2593 | .lm_break = nfsd_break_deleg_cb, |
| 2594 | .lm_change = nfsd_change_deleg_cb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2595 | }; |
| 2596 | |
J. Bruce Fields | 7a8711c | 2011-09-02 09:03:37 -0400 | [diff] [blame] | 2597 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
| 2598 | { |
| 2599 | if (nfsd4_has_session(cstate)) |
| 2600 | return nfs_ok; |
| 2601 | if (seqid == so->so_seqid - 1) |
| 2602 | return nfserr_replay_me; |
| 2603 | if (seqid == so->so_seqid) |
| 2604 | return nfs_ok; |
| 2605 | return nfserr_bad_seqid; |
| 2606 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2607 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2608 | __be32 |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 2609 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
| 2610 | struct nfsd4_open *open) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2611 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2612 | clientid_t *clientid = &open->op_clientid; |
| 2613 | struct nfs4_client *clp = NULL; |
| 2614 | unsigned int strhashval; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2615 | struct nfs4_openowner *oo = NULL; |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 2616 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2618 | if (STALE_CLIENTID(&open->op_clientid)) |
| 2619 | return nfserr_stale_clientid; |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 2620 | /* |
| 2621 | * In case we need it later, after we've already created the |
| 2622 | * file and don't want to risk a further failure: |
| 2623 | */ |
| 2624 | open->op_file = nfsd4_alloc_file(); |
| 2625 | if (open->op_file == NULL) |
| 2626 | return nfserr_jukebox; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2627 | |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 2628 | strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2629 | oo = find_openstateowner_str(strhashval, open); |
| 2630 | open->op_openowner = oo; |
| 2631 | if (!oo) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2632 | clp = find_confirmed_client(clientid); |
| 2633 | if (clp == NULL) |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2634 | return nfserr_expired; |
J. Bruce Fields | bcf130f | 2011-10-12 20:44:20 -0400 | [diff] [blame] | 2635 | goto new_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2636 | } |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 2637 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2638 | /* Replace unconfirmed owners without checking for replay. */ |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2639 | clp = oo->oo_owner.so_client; |
| 2640 | release_openowner(oo); |
| 2641 | open->op_openowner = NULL; |
J. Bruce Fields | bcf130f | 2011-10-12 20:44:20 -0400 | [diff] [blame] | 2642 | goto new_owner; |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2643 | } |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 2644 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
| 2645 | if (status) |
| 2646 | return status; |
| 2647 | clp = oo->oo_owner.so_client; |
| 2648 | goto alloc_stateid; |
J. Bruce Fields | bcf130f | 2011-10-12 20:44:20 -0400 | [diff] [blame] | 2649 | new_owner: |
| 2650 | oo = alloc_init_open_stateowner(strhashval, clp, open); |
| 2651 | if (oo == NULL) |
| 2652 | return nfserr_jukebox; |
| 2653 | open->op_openowner = oo; |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 2654 | alloc_stateid: |
| 2655 | open->op_stp = nfs4_alloc_stateid(clp); |
| 2656 | if (!open->op_stp) |
| 2657 | return nfserr_jukebox; |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 2658 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2659 | } |
| 2660 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2661 | static inline __be32 |
NeilBrown | 4a6e43e | 2005-06-23 22:02:50 -0700 | [diff] [blame] | 2662 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
| 2663 | { |
| 2664 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) |
| 2665 | return nfserr_openmode; |
| 2666 | else |
| 2667 | return nfs_ok; |
| 2668 | } |
| 2669 | |
Daniel Mack | c47d832 | 2011-05-16 16:38:14 +0200 | [diff] [blame] | 2670 | static int share_access_to_flags(u32 share_access) |
J. Bruce Fields | 24a0111 | 2010-05-18 20:01:35 -0400 | [diff] [blame] | 2671 | { |
J. Bruce Fields | 24a0111 | 2010-05-18 20:01:35 -0400 | [diff] [blame] | 2672 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; |
| 2673 | } |
| 2674 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 2675 | 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] | 2676 | { |
| 2677 | struct nfs4_stid *ret; |
| 2678 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 2679 | ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); |
J. Bruce Fields | f459e45 | 2011-09-09 09:06:12 -0400 | [diff] [blame] | 2680 | if (!ret) |
| 2681 | return NULL; |
| 2682 | return delegstateid(ret); |
| 2683 | } |
| 2684 | |
J. Bruce Fields | 8b289b2 | 2011-10-19 11:52:12 -0400 | [diff] [blame] | 2685 | static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) |
| 2686 | { |
| 2687 | return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || |
| 2688 | open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; |
| 2689 | } |
| 2690 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2691 | static __be32 |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 2692 | 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] | 2693 | struct nfs4_delegation **dp) |
| 2694 | { |
| 2695 | int flags; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2696 | __be32 status = nfserr_bad_stateid; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2697 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 2698 | *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2699 | if (*dp == NULL) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2700 | goto out; |
J. Bruce Fields | 24a0111 | 2010-05-18 20:01:35 -0400 | [diff] [blame] | 2701 | flags = share_access_to_flags(open->op_share_access); |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2702 | status = nfs4_check_delegmode(*dp, flags); |
| 2703 | if (status) |
| 2704 | *dp = NULL; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2705 | out: |
J. Bruce Fields | 8b289b2 | 2011-10-19 11:52:12 -0400 | [diff] [blame] | 2706 | if (!nfsd4_is_deleg_cur(open)) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2707 | return nfs_ok; |
| 2708 | if (status) |
| 2709 | return status; |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 2710 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 2711 | return nfs_ok; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 2712 | } |
| 2713 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2714 | static __be32 |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 2715 | 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] | 2716 | { |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 2717 | struct nfs4_ol_stateid *local; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2718 | struct nfs4_openowner *oo = open->op_openowner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2719 | |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 2720 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2721 | /* ignore lock owners */ |
| 2722 | if (local->st_stateowner->so_is_open_owner == 0) |
| 2723 | continue; |
| 2724 | /* remember if we have seen this open owner */ |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2725 | if (local->st_stateowner == &oo->oo_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2726 | *stpp = local; |
| 2727 | /* check for conflicting share reservations */ |
| 2728 | if (!test_share(local, open)) |
J. Bruce Fields | 77eaae8 | 2011-09-02 12:08:20 -0400 | [diff] [blame] | 2729 | return nfserr_share_denied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2730 | } |
J. Bruce Fields | 77eaae8 | 2011-09-02 12:08:20 -0400 | [diff] [blame] | 2731 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2732 | } |
| 2733 | |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 2734 | static void nfs4_free_stateid(struct nfs4_ol_stateid *s) |
| 2735 | { |
| 2736 | kmem_cache_free(stateid_slab, s); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2737 | } |
| 2738 | |
J. Bruce Fields | 21fb401 | 2010-07-28 12:21:23 -0400 | [diff] [blame] | 2739 | static inline int nfs4_access_to_access(u32 nfs4_access) |
| 2740 | { |
| 2741 | int flags = 0; |
| 2742 | |
| 2743 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) |
| 2744 | flags |= NFSD_MAY_READ; |
| 2745 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) |
| 2746 | flags |= NFSD_MAY_WRITE; |
| 2747 | return flags; |
| 2748 | } |
| 2749 | |
Casey Bodley | 0c12eaf | 2011-07-23 14:58:10 -0400 | [diff] [blame] | 2750 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
| 2751 | struct svc_fh *cur_fh, struct nfsd4_open *open) |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2752 | { |
| 2753 | __be32 status; |
Casey Bodley | 0c12eaf | 2011-07-23 14:58:10 -0400 | [diff] [blame] | 2754 | int oflag = nfs4_access_to_omode(open->op_share_access); |
| 2755 | int access = nfs4_access_to_access(open->op_share_access); |
| 2756 | |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2757 | if (!fp->fi_fds[oflag]) { |
| 2758 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, |
| 2759 | &fp->fi_fds[oflag]); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2760 | if (status) |
| 2761 | return status; |
| 2762 | } |
| 2763 | nfs4_file_get_access(fp, oflag); |
| 2764 | |
| 2765 | return nfs_ok; |
| 2766 | } |
| 2767 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2768 | static inline __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2769 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
| 2770 | struct nfsd4_open *open) |
| 2771 | { |
| 2772 | struct iattr iattr = { |
| 2773 | .ia_valid = ATTR_SIZE, |
| 2774 | .ia_size = 0, |
| 2775 | }; |
| 2776 | if (!open->op_truncate) |
| 2777 | return 0; |
| 2778 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) |
Al Viro | 9246585 | 2006-01-18 17:43:46 -0800 | [diff] [blame] | 2779 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2780 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
| 2781 | } |
| 2782 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2783 | static __be32 |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 2784 | 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] | 2785 | { |
J. Bruce Fields | b6d2f1c | 2011-10-10 17:44:19 -0400 | [diff] [blame] | 2786 | u32 op_share_access = open->op_share_access; |
J. Bruce Fields | 7d94784 | 2010-08-20 18:09:31 -0400 | [diff] [blame] | 2787 | bool new_access; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 2788 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2789 | |
J. Bruce Fields | 7d94784 | 2010-08-20 18:09:31 -0400 | [diff] [blame] | 2790 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2791 | if (new_access) { |
Casey Bodley | 0c12eaf | 2011-07-23 14:58:10 -0400 | [diff] [blame] | 2792 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2793 | if (status) |
| 2794 | return status; |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 2795 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2796 | status = nfsd4_truncate(rqstp, cur_fh, open); |
| 2797 | if (status) { |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2798 | if (new_access) { |
J. Bruce Fields | f197c27 | 2011-06-29 08:23:50 -0400 | [diff] [blame] | 2799 | int oflag = nfs4_access_to_omode(op_share_access); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 2800 | nfs4_file_put_access(fp, oflag); |
| 2801 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2802 | return status; |
| 2803 | } |
| 2804 | /* remember the open */ |
J. Bruce Fields | 24a0111 | 2010-05-18 20:01:35 -0400 | [diff] [blame] | 2805 | __set_bit(op_share_access, &stp->st_access_bmap); |
J. Bruce Fields | b55e0ba | 2008-04-28 18:22:50 -0400 | [diff] [blame] | 2806 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2807 | |
| 2808 | return nfs_ok; |
| 2809 | } |
| 2810 | |
| 2811 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2812 | static void |
J. Bruce Fields | 1255a8f | 2012-03-06 14:35:16 -0500 | [diff] [blame] | 2813 | nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2814 | { |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 2815 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2816 | } |
| 2817 | |
J. Bruce Fields | 14a24e9 | 2010-12-10 19:02:49 -0500 | [diff] [blame] | 2818 | /* Should we give out recallable state?: */ |
| 2819 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) |
| 2820 | { |
| 2821 | if (clp->cl_cb_state == NFSD4_CB_UP) |
| 2822 | return true; |
| 2823 | /* |
| 2824 | * In the sessions case, since we don't have to establish a |
| 2825 | * separate connection for callbacks, we assume it's OK |
| 2826 | * until we hear otherwise: |
| 2827 | */ |
| 2828 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; |
| 2829 | } |
| 2830 | |
J. Bruce Fields | 22d38c4 | 2011-01-31 11:55:12 -0500 | [diff] [blame] | 2831 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
| 2832 | { |
| 2833 | struct file_lock *fl; |
| 2834 | |
| 2835 | fl = locks_alloc_lock(); |
| 2836 | if (!fl) |
| 2837 | return NULL; |
| 2838 | locks_init_lock(fl); |
| 2839 | fl->fl_lmops = &nfsd_lease_mng_ops; |
| 2840 | fl->fl_flags = FL_LEASE; |
| 2841 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
| 2842 | fl->fl_end = OFFSET_MAX; |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2843 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
J. Bruce Fields | 22d38c4 | 2011-01-31 11:55:12 -0500 | [diff] [blame] | 2844 | fl->fl_pid = current->tgid; |
J. Bruce Fields | 22d38c4 | 2011-01-31 11:55:12 -0500 | [diff] [blame] | 2845 | return fl; |
| 2846 | } |
| 2847 | |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 2848 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
| 2849 | { |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2850 | struct nfs4_file *fp = dp->dl_file; |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 2851 | struct file_lock *fl; |
| 2852 | int status; |
| 2853 | |
| 2854 | fl = nfs4_alloc_init_lease(dp, flag); |
| 2855 | if (!fl) |
| 2856 | return -ENOMEM; |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2857 | fl->fl_file = find_readable_file(fp); |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 2858 | 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] | 2859 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 2860 | if (status) { |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2861 | list_del_init(&dp->dl_perclnt); |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 2862 | locks_free_lock(fl); |
| 2863 | return -ENOMEM; |
| 2864 | } |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2865 | fp->fi_lease = fl; |
| 2866 | fp->fi_deleg_file = fl->fl_file; |
| 2867 | get_file(fp->fi_deleg_file); |
| 2868 | atomic_set(&fp->fi_delegees, 1); |
| 2869 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
| 2870 | return 0; |
| 2871 | } |
| 2872 | |
| 2873 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) |
| 2874 | { |
| 2875 | struct nfs4_file *fp = dp->dl_file; |
| 2876 | |
| 2877 | if (!fp->fi_lease) |
| 2878 | return nfs4_setlease(dp, flag); |
| 2879 | spin_lock(&recall_lock); |
| 2880 | if (fp->fi_had_conflict) { |
| 2881 | spin_unlock(&recall_lock); |
| 2882 | return -EAGAIN; |
| 2883 | } |
| 2884 | atomic_inc(&fp->fi_delegees); |
| 2885 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
| 2886 | spin_unlock(&recall_lock); |
J. Bruce Fields | 2a74aba | 2011-09-23 17:20:02 -0400 | [diff] [blame] | 2887 | 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] | 2888 | return 0; |
| 2889 | } |
| 2890 | |
Benny Halevy | 4aa8913 | 2012-02-21 14:16:44 -0800 | [diff] [blame] | 2891 | static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) |
| 2892 | { |
| 2893 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; |
| 2894 | if (status == -EAGAIN) |
| 2895 | open->op_why_no_deleg = WND4_CONTENTION; |
| 2896 | else { |
| 2897 | open->op_why_no_deleg = WND4_RESOURCE; |
| 2898 | switch (open->op_deleg_want) { |
| 2899 | case NFS4_SHARE_WANT_READ_DELEG: |
| 2900 | case NFS4_SHARE_WANT_WRITE_DELEG: |
| 2901 | case NFS4_SHARE_WANT_ANY_DELEG: |
| 2902 | break; |
| 2903 | case NFS4_SHARE_WANT_CANCEL: |
| 2904 | open->op_why_no_deleg = WND4_CANCELLED; |
| 2905 | break; |
| 2906 | case NFS4_SHARE_WANT_NO_DELEG: |
| 2907 | BUG(); /* not supposed to get here */ |
| 2908 | } |
| 2909 | } |
| 2910 | } |
| 2911 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2912 | /* |
| 2913 | * Attempt to hand out a delegation. |
| 2914 | */ |
| 2915 | static void |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 2916 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2917 | { |
| 2918 | struct nfs4_delegation *dp; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2919 | 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] | 2920 | int cb_up; |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 2921 | int status = 0, flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2922 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2923 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2924 | flag = NFS4_OPEN_DELEGATE_NONE; |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2925 | open->op_recall = 0; |
| 2926 | switch (open->op_claim_type) { |
| 2927 | case NFS4_OPEN_CLAIM_PREVIOUS: |
J. Bruce Fields | 2bf2387 | 2010-03-08 12:37:27 -0500 | [diff] [blame] | 2928 | if (!cb_up) |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2929 | open->op_recall = 1; |
| 2930 | flag = open->op_delegate_type; |
| 2931 | if (flag == NFS4_OPEN_DELEGATE_NONE) |
| 2932 | goto out; |
| 2933 | break; |
| 2934 | case NFS4_OPEN_CLAIM_NULL: |
| 2935 | /* Let's not give out any delegations till everyone's |
| 2936 | * had the chance to reclaim theirs.... */ |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 2937 | if (locks_in_grace()) |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2938 | goto out; |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 2939 | if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 2940 | goto out; |
| 2941 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
| 2942 | flag = NFS4_OPEN_DELEGATE_WRITE; |
| 2943 | else |
| 2944 | flag = NFS4_OPEN_DELEGATE_READ; |
| 2945 | break; |
| 2946 | default: |
| 2947 | goto out; |
| 2948 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2949 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 2950 | 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] | 2951 | if (dp == NULL) |
| 2952 | goto out_no_deleg; |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2953 | status = nfs4_set_delegation(dp, flag); |
J. Bruce Fields | edab978 | 2011-01-31 17:58:10 -0500 | [diff] [blame] | 2954 | if (status) |
J. Bruce Fields | dd239cc | 2011-01-31 17:14:55 -0500 | [diff] [blame] | 2955 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2956 | |
J. Bruce Fields | d5477a8 | 2011-09-08 12:07:44 -0400 | [diff] [blame] | 2957 | 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] | 2958 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 2959 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
J. Bruce Fields | d5477a8 | 2011-09-08 12:07:44 -0400 | [diff] [blame] | 2960 | STATEID_VAL(&dp->dl_stid.sc_stateid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2961 | out: |
| 2962 | open->op_delegate_type = flag; |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 2963 | if (flag == NFS4_OPEN_DELEGATE_NONE) { |
| 2964 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && |
| 2965 | open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) |
| 2966 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
| 2967 | |
Benny Halevy | 4aa8913 | 2012-02-21 14:16:44 -0800 | [diff] [blame] | 2968 | /* 4.1 client asking for a delegation? */ |
| 2969 | if (open->op_deleg_want) |
| 2970 | nfsd4_open_deleg_none_ext(open, status); |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 2971 | } |
J. Bruce Fields | dd239cc | 2011-01-31 17:14:55 -0500 | [diff] [blame] | 2972 | return; |
| 2973 | out_free: |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 2974 | nfs4_put_delegation(dp); |
J. Bruce Fields | dd239cc | 2011-01-31 17:14:55 -0500 | [diff] [blame] | 2975 | out_no_deleg: |
| 2976 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 2977 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2978 | } |
| 2979 | |
Benny Halevy | e27f49c | 2012-02-21 14:16:54 -0800 | [diff] [blame] | 2980 | static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, |
| 2981 | struct nfs4_delegation *dp) |
| 2982 | { |
| 2983 | if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && |
| 2984 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { |
| 2985 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; |
| 2986 | open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; |
| 2987 | } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && |
| 2988 | dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { |
| 2989 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; |
| 2990 | open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; |
| 2991 | } |
| 2992 | /* Otherwise the client must be confused wanting a delegation |
| 2993 | * it already has, therefore we don't return |
| 2994 | * NFS4_OPEN_DELEGATE_NONE_EXT and reason. |
| 2995 | */ |
| 2996 | } |
| 2997 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2998 | /* |
| 2999 | * called with nfs4_lock_state() held. |
| 3000 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3001 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3002 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
| 3003 | { |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3004 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3005 | struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3006 | struct nfs4_file *fp = NULL; |
| 3007 | struct inode *ino = current_fh->fh_dentry->d_inode; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3008 | struct nfs4_ol_stateid *stp = NULL; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 3009 | struct nfs4_delegation *dp = NULL; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3010 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3011 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3012 | /* |
| 3013 | * Lookup file; if found, lookup stateid and check open request, |
| 3014 | * and check for delegations in the process of being recalled. |
| 3015 | * If not found, create the nfs4_file struct |
| 3016 | */ |
| 3017 | fp = find_file(ino); |
| 3018 | if (fp) { |
| 3019 | if ((status = nfs4_check_open(fp, open, &stp))) |
| 3020 | goto out; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3021 | status = nfs4_check_deleg(cl, fp, open, &dp); |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 3022 | if (status) |
| 3023 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3024 | } else { |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 3025 | status = nfserr_bad_stateid; |
J. Bruce Fields | 8b289b2 | 2011-10-19 11:52:12 -0400 | [diff] [blame] | 3026 | if (nfsd4_is_deleg_cur(open)) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 3027 | goto out; |
J. Bruce Fields | 3e77246 | 2011-08-10 19:07:33 -0400 | [diff] [blame] | 3028 | status = nfserr_jukebox; |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 3029 | fp = open->op_file; |
| 3030 | open->op_file = NULL; |
| 3031 | nfsd4_init_file(fp, ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3032 | } |
| 3033 | |
| 3034 | /* |
| 3035 | * OPEN the file, or upgrade an existing OPEN. |
| 3036 | * If truncate fails, the OPEN fails. |
| 3037 | */ |
| 3038 | if (stp) { |
| 3039 | /* Stateid was found, this is an OPEN upgrade */ |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 3040 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3041 | if (status) |
| 3042 | goto out; |
| 3043 | } else { |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 3044 | status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 3045 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3046 | goto out; |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 3047 | stp = open->op_stp; |
| 3048 | open->op_stp = NULL; |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 3049 | init_open_stateid(stp, fp, open); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3050 | status = nfsd4_truncate(rqstp, current_fh, open); |
| 3051 | if (status) { |
J. Bruce Fields | 2283963 | 2009-01-11 14:27:17 -0500 | [diff] [blame] | 3052 | release_open_stateid(stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3053 | goto out; |
| 3054 | } |
| 3055 | } |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3056 | update_stateid(&stp->st_stid.sc_stateid); |
| 3057 | memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3058 | |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 3059 | if (nfsd4_has_session(&resp->cstate)) { |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3060 | open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3061 | |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 3062 | if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { |
| 3063 | open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; |
| 3064 | open->op_why_no_deleg = WND4_NOT_WANTED; |
| 3065 | goto nodeleg; |
| 3066 | } |
| 3067 | } |
| 3068 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3069 | /* |
| 3070 | * Attempt to hand out a delegation. No error return, because the |
| 3071 | * OPEN succeeds even if we fail. |
| 3072 | */ |
| 3073 | nfs4_open_delegation(current_fh, open, stp); |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 3074 | nodeleg: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3075 | status = nfs_ok; |
| 3076 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 3077 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3078 | STATEID_VAL(&stp->st_stid.sc_stateid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3079 | out: |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 3080 | /* 4.1 client trying to upgrade/downgrade delegation? */ |
| 3081 | if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && |
Benny Halevy | e27f49c | 2012-02-21 14:16:54 -0800 | [diff] [blame] | 3082 | open->op_deleg_want) |
| 3083 | nfsd4_deleg_xgrade_none_ext(open, dp); |
Benny Halevy | d24433c | 2012-02-16 20:57:17 +0200 | [diff] [blame] | 3084 | |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 3085 | if (fp) |
| 3086 | put_nfs4_file(fp); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 3087 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
J. Bruce Fields | 1255a8f | 2012-03-06 14:35:16 -0500 | [diff] [blame] | 3088 | nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3089 | /* |
| 3090 | * To finish the open response, we just need to set the rflags. |
| 3091 | */ |
| 3092 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3093 | if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3094 | !nfsd4_has_session(&resp->cstate)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3095 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
| 3096 | |
| 3097 | return status; |
| 3098 | } |
| 3099 | |
J. Bruce Fields | d29b20c | 2011-10-13 15:12:59 -0400 | [diff] [blame] | 3100 | void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) |
| 3101 | { |
| 3102 | if (open->op_openowner) { |
| 3103 | struct nfs4_openowner *oo = open->op_openowner; |
| 3104 | |
| 3105 | if (!list_empty(&oo->oo_owner.so_stateids)) |
| 3106 | list_del_init(&oo->oo_close_lru); |
| 3107 | if (oo->oo_flags & NFS4_OO_NEW) { |
| 3108 | if (status) { |
| 3109 | release_openowner(oo); |
| 3110 | open->op_openowner = NULL; |
| 3111 | } else |
| 3112 | oo->oo_flags &= ~NFS4_OO_NEW; |
| 3113 | } |
| 3114 | } |
J. Bruce Fields | 32513b4 | 2011-10-13 16:00:16 -0400 | [diff] [blame] | 3115 | if (open->op_file) |
| 3116 | nfsd4_free_file(open->op_file); |
J. Bruce Fields | 4cdc951 | 2011-10-17 15:57:47 -0400 | [diff] [blame] | 3117 | if (open->op_stp) |
| 3118 | nfs4_free_stateid(open->op_stp); |
J. Bruce Fields | d29b20c | 2011-10-13 15:12:59 -0400 | [diff] [blame] | 3119 | } |
| 3120 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3121 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 3122 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 3123 | clientid_t *clid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3124 | { |
| 3125 | struct nfs4_client *clp; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3126 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3127 | |
| 3128 | nfs4_lock_state(); |
| 3129 | dprintk("process_renew(%08x/%08x): starting\n", |
| 3130 | clid->cl_boot, clid->cl_id); |
| 3131 | status = nfserr_stale_clientid; |
| 3132 | if (STALE_CLIENTID(clid)) |
| 3133 | goto out; |
| 3134 | clp = find_confirmed_client(clid); |
| 3135 | status = nfserr_expired; |
| 3136 | if (clp == NULL) { |
| 3137 | /* We assume the client took too long to RENEW. */ |
| 3138 | dprintk("nfsd4_renew: clientid not found!\n"); |
| 3139 | goto out; |
| 3140 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3141 | status = nfserr_cb_path_down; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 3142 | if (!list_empty(&clp->cl_delegations) |
J. Bruce Fields | 77a3569 | 2010-04-30 18:51:44 -0400 | [diff] [blame] | 3143 | && clp->cl_cb_state != NFSD4_CB_UP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3144 | goto out; |
| 3145 | status = nfs_ok; |
| 3146 | out: |
| 3147 | nfs4_unlock_state(); |
| 3148 | return status; |
| 3149 | } |
| 3150 | |
Daniel Mack | c47d832 | 2011-05-16 16:38:14 +0200 | [diff] [blame] | 3151 | static struct lock_manager nfsd4_manager = { |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3152 | }; |
| 3153 | |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 3154 | static void |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3155 | nfsd4_end_grace(void) |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 3156 | { |
| 3157 | dprintk("NFSD: end of grace period\n"); |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 3158 | nfsd4_record_grace_done(&init_net, boot_time); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3159 | locks_end_grace(&nfsd4_manager); |
J. Bruce Fields | e46b498 | 2010-03-01 19:21:21 -0500 | [diff] [blame] | 3160 | /* |
| 3161 | * Now that every NFSv4 client has had the chance to recover and |
| 3162 | * to see the (possibly new, possibly shorter) lease time, we |
| 3163 | * can safely set the next grace time to the current lease time: |
| 3164 | */ |
| 3165 | nfsd4_grace = nfsd4_lease; |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 3166 | } |
| 3167 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 3168 | static time_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3169 | nfs4_laundromat(void) |
| 3170 | { |
| 3171 | struct nfs4_client *clp; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3172 | struct nfs4_openowner *oo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3173 | struct nfs4_delegation *dp; |
| 3174 | struct list_head *pos, *next, reaplist; |
J. Bruce Fields | cf07d2e | 2010-02-28 23:20:19 -0500 | [diff] [blame] | 3175 | time_t cutoff = get_seconds() - nfsd4_lease; |
| 3176 | time_t t, clientid_val = nfsd4_lease; |
| 3177 | time_t u, test_val = nfsd4_lease; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3178 | |
| 3179 | nfs4_lock_state(); |
| 3180 | |
| 3181 | dprintk("NFSD: laundromat service - starting\n"); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3182 | if (locks_in_grace()) |
| 3183 | nfsd4_end_grace(); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 3184 | INIT_LIST_HEAD(&reaplist); |
| 3185 | spin_lock(&client_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3186 | list_for_each_safe(pos, next, &client_lru) { |
| 3187 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
| 3188 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { |
| 3189 | t = clp->cl_time - cutoff; |
| 3190 | if (clientid_val > t) |
| 3191 | clientid_val = t; |
| 3192 | break; |
| 3193 | } |
Benny Halevy | d768298 | 2010-05-12 00:13:54 +0300 | [diff] [blame] | 3194 | if (atomic_read(&clp->cl_refcount)) { |
| 3195 | dprintk("NFSD: client in use (clientid %08x)\n", |
| 3196 | clp->cl_clientid.cl_id); |
| 3197 | continue; |
| 3198 | } |
| 3199 | unhash_client_locked(clp); |
| 3200 | list_add(&clp->cl_lru, &reaplist); |
Benny Halevy | 36acb66 | 2010-05-12 00:13:04 +0300 | [diff] [blame] | 3201 | } |
| 3202 | spin_unlock(&client_lock); |
| 3203 | list_for_each_safe(pos, next, &reaplist) { |
| 3204 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3205 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
| 3206 | clp->cl_clientid.cl_id); |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 3207 | nfsd4_client_record_remove(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3208 | expire_client(clp); |
| 3209 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3210 | spin_lock(&recall_lock); |
| 3211 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 3212 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 3213 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
| 3214 | u = dp->dl_time - cutoff; |
| 3215 | if (test_val > u) |
| 3216 | test_val = u; |
| 3217 | break; |
| 3218 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3219 | list_move(&dp->dl_recall_lru, &reaplist); |
| 3220 | } |
| 3221 | spin_unlock(&recall_lock); |
| 3222 | list_for_each_safe(pos, next, &reaplist) { |
| 3223 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3224 | unhash_delegation(dp); |
| 3225 | } |
J. Bruce Fields | cf07d2e | 2010-02-28 23:20:19 -0500 | [diff] [blame] | 3226 | test_val = nfsd4_lease; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3227 | list_for_each_safe(pos, next, &close_lru) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3228 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
| 3229 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { |
| 3230 | u = oo->oo_time - cutoff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3231 | if (test_val > u) |
| 3232 | test_val = u; |
| 3233 | break; |
| 3234 | } |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3235 | release_openowner(oo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3236 | } |
| 3237 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) |
| 3238 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; |
| 3239 | nfs4_unlock_state(); |
| 3240 | return clientid_val; |
| 3241 | } |
| 3242 | |
Harvey Harrison | a254b24 | 2008-02-20 12:49:00 -0800 | [diff] [blame] | 3243 | static struct workqueue_struct *laundry_wq; |
| 3244 | static void laundromat_main(struct work_struct *); |
| 3245 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); |
| 3246 | |
| 3247 | static void |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 3248 | laundromat_main(struct work_struct *not_used) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3249 | { |
| 3250 | time_t t; |
| 3251 | |
| 3252 | t = nfs4_laundromat(); |
| 3253 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 3254 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3255 | } |
| 3256 | |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3257 | 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] | 3258 | { |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3259 | if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) |
| 3260 | return nfserr_bad_stateid; |
| 3261 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3262 | } |
| 3263 | |
| 3264 | static int |
| 3265 | STALE_STATEID(stateid_t *stateid) |
| 3266 | { |
J. Bruce Fields | d3b313a | 2011-09-15 15:02:41 -0400 | [diff] [blame] | 3267 | if (stateid->si_opaque.so_clid.cl_boot == boot_time) |
J. Bruce Fields | e4e83ea | 2010-04-22 16:21:39 -0400 | [diff] [blame] | 3268 | return 0; |
| 3269 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 3270 | STATEID_VAL(stateid)); |
J. Bruce Fields | e4e83ea | 2010-04-22 16:21:39 -0400 | [diff] [blame] | 3271 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3272 | } |
| 3273 | |
| 3274 | static inline int |
| 3275 | access_permit_read(unsigned long access_bmap) |
| 3276 | { |
| 3277 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || |
| 3278 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || |
| 3279 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); |
| 3280 | } |
| 3281 | |
| 3282 | static inline int |
| 3283 | access_permit_write(unsigned long access_bmap) |
| 3284 | { |
| 3285 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || |
| 3286 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); |
| 3287 | } |
| 3288 | |
| 3289 | static |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3290 | __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3291 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3292 | __be32 status = nfserr_openmode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3293 | |
J. Bruce Fields | 0292191 | 2010-07-29 15:16:59 -0400 | [diff] [blame] | 3294 | /* For lock stateid's, we test the parent open, not the lock: */ |
| 3295 | if (stp->st_openstp) |
| 3296 | stp = stp->st_openstp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3297 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
| 3298 | goto out; |
| 3299 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) |
| 3300 | goto out; |
| 3301 | status = nfs_ok; |
| 3302 | out: |
| 3303 | return status; |
| 3304 | } |
| 3305 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3306 | static inline __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3307 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
| 3308 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3309 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3310 | return nfs_ok; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 3311 | else if (locks_in_grace()) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3312 | /* Answer in remaining cases depends on existence of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3313 | * conflicting state; so we must wait out the grace period. */ |
| 3314 | return nfserr_grace; |
| 3315 | } else if (flags & WR_STATE) |
| 3316 | return nfs4_share_conflict(current_fh, |
| 3317 | NFS4_SHARE_DENY_WRITE); |
| 3318 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ |
| 3319 | return nfs4_share_conflict(current_fh, |
| 3320 | NFS4_SHARE_DENY_READ); |
| 3321 | } |
| 3322 | |
| 3323 | /* |
| 3324 | * Allow READ/WRITE during grace period on recovered state only for files |
| 3325 | * that are not able to provide mandatory locking. |
| 3326 | */ |
| 3327 | static inline int |
J. Bruce Fields | 18f8273 | 2009-02-21 15:23:01 -0800 | [diff] [blame] | 3328 | grace_disallows_io(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3329 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3330 | return locks_in_grace() && mandatory_lock(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3331 | } |
| 3332 | |
J. Bruce Fields | 81b8296 | 2011-08-23 11:03:29 -0400 | [diff] [blame] | 3333 | /* Returns true iff a is later than b: */ |
| 3334 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) |
| 3335 | { |
| 3336 | return (s32)a->si_generation - (s32)b->si_generation > 0; |
| 3337 | } |
| 3338 | |
J. Bruce Fields | 28dde24 | 2011-08-22 10:07:12 -0400 | [diff] [blame] | 3339 | static int 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] | 3340 | { |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3341 | /* |
| 3342 | * When sessions are used the stateid generation number is ignored |
| 3343 | * when it is zero. |
| 3344 | */ |
J. Bruce Fields | 28dde24 | 2011-08-22 10:07:12 -0400 | [diff] [blame] | 3345 | if (has_session && in->si_generation == 0) |
J. Bruce Fields | 81b8296 | 2011-08-23 11:03:29 -0400 | [diff] [blame] | 3346 | return nfs_ok; |
| 3347 | |
| 3348 | if (in->si_generation == ref->si_generation) |
| 3349 | return nfs_ok; |
Andy Adamson | 6668958 | 2009-04-03 08:28:45 +0300 | [diff] [blame] | 3350 | |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 3351 | /* 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] | 3352 | if (stateid_generation_after(in, ref)) |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 3353 | return nfserr_bad_stateid; |
| 3354 | /* |
J. Bruce Fields | 81b8296 | 2011-08-23 11:03:29 -0400 | [diff] [blame] | 3355 | * However, we could see a stateid from the past, even from a |
| 3356 | * non-buggy client. For example, if the client sends a lock |
| 3357 | * while some IO is outstanding, the lock may bump si_generation |
| 3358 | * while the IO is still in flight. The client could avoid that |
| 3359 | * situation by waiting for responses on all the IO requests, |
| 3360 | * but better performance may result in retrying IO that |
| 3361 | * receives an old_stateid error if requests are rarely |
| 3362 | * reordered in flight: |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 3363 | */ |
J. Bruce Fields | 81b8296 | 2011-08-23 11:03:29 -0400 | [diff] [blame] | 3364 | return nfserr_old_stateid; |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 3365 | } |
| 3366 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3367 | __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 3368 | { |
J. Bruce Fields | 97b7e3b | 2011-09-09 11:26:58 -0400 | [diff] [blame] | 3369 | struct nfs4_stid *s; |
| 3370 | struct nfs4_ol_stateid *ols; |
| 3371 | __be32 status; |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 3372 | |
| 3373 | if (STALE_STATEID(stateid)) |
J. Bruce Fields | 97b7e3b | 2011-09-09 11:26:58 -0400 | [diff] [blame] | 3374 | return nfserr_stale_stateid; |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 3375 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3376 | s = find_stateid(cl, stateid); |
J. Bruce Fields | 97b7e3b | 2011-09-09 11:26:58 -0400 | [diff] [blame] | 3377 | if (!s) |
| 3378 | return nfserr_stale_stateid; |
J. Bruce Fields | 36279ac | 2011-09-26 12:53:00 -0400 | [diff] [blame] | 3379 | status = check_stateid_generation(stateid, &s->sc_stateid, 1); |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 3380 | if (status) |
J. Bruce Fields | 97b7e3b | 2011-09-09 11:26:58 -0400 | [diff] [blame] | 3381 | return status; |
| 3382 | if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) |
| 3383 | return nfs_ok; |
| 3384 | ols = openlockstateid(s); |
| 3385 | if (ols->st_stateowner->so_is_open_owner |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3386 | && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
J. Bruce Fields | 97b7e3b | 2011-09-09 11:26:58 -0400 | [diff] [blame] | 3387 | return nfserr_bad_stateid; |
| 3388 | return nfs_ok; |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 3389 | } |
| 3390 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3391 | static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) |
| 3392 | { |
| 3393 | struct nfs4_client *cl; |
| 3394 | |
| 3395 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 3396 | return nfserr_bad_stateid; |
| 3397 | if (STALE_STATEID(stateid)) |
| 3398 | return nfserr_stale_stateid; |
| 3399 | cl = find_confirmed_client(&stateid->si_opaque.so_clid); |
| 3400 | if (!cl) |
| 3401 | return nfserr_expired; |
| 3402 | *s = find_stateid_by_type(cl, stateid, typemask); |
| 3403 | if (!*s) |
| 3404 | return nfserr_bad_stateid; |
| 3405 | return nfs_ok; |
| 3406 | |
| 3407 | } |
| 3408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3409 | /* |
| 3410 | * Checks for stateid operations |
| 3411 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3412 | __be32 |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3413 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
| 3414 | stateid_t *stateid, int flags, struct file **filpp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3415 | { |
J. Bruce Fields | 69064a2 | 2011-09-09 11:54:57 -0400 | [diff] [blame] | 3416 | struct nfs4_stid *s; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3417 | struct nfs4_ol_stateid *stp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3418 | struct nfs4_delegation *dp = NULL; |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3419 | struct svc_fh *current_fh = &cstate->current_fh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3420 | struct inode *ino = current_fh->fh_dentry->d_inode; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3421 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3422 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3423 | if (filpp) |
| 3424 | *filpp = NULL; |
| 3425 | |
J. Bruce Fields | 18f8273 | 2009-02-21 15:23:01 -0800 | [diff] [blame] | 3426 | if (grace_disallows_io(ino)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3427 | return nfserr_grace; |
| 3428 | |
| 3429 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 3430 | return check_special_stateids(current_fh, stateid, flags); |
| 3431 | |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3432 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); |
| 3433 | if (status) |
| 3434 | return status; |
J. Bruce Fields | 69064a2 | 2011-09-09 11:54:57 -0400 | [diff] [blame] | 3435 | status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); |
| 3436 | if (status) |
| 3437 | goto out; |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3438 | switch (s->sc_type) { |
| 3439 | case NFS4_DELEG_STID: |
J. Bruce Fields | 69064a2 | 2011-09-09 11:54:57 -0400 | [diff] [blame] | 3440 | dp = delegstateid(s); |
J. Bruce Fields | dc9bf70 | 2009-02-21 11:14:43 -0800 | [diff] [blame] | 3441 | status = nfs4_check_delegmode(dp, flags); |
| 3442 | if (status) |
| 3443 | goto out; |
Dan Carpenter | 43b0178e | 2010-10-27 23:19:04 +0200 | [diff] [blame] | 3444 | if (filpp) { |
J. Bruce Fields | acfdf5c | 2011-01-31 19:20:39 -0500 | [diff] [blame] | 3445 | *filpp = dp->dl_file->fi_deleg_file; |
Dan Carpenter | 43b0178e | 2010-10-27 23:19:04 +0200 | [diff] [blame] | 3446 | BUG_ON(!*filpp); |
| 3447 | } |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3448 | break; |
| 3449 | case NFS4_OPEN_STID: |
| 3450 | case NFS4_LOCK_STID: |
J. Bruce Fields | 69064a2 | 2011-09-09 11:54:57 -0400 | [diff] [blame] | 3451 | stp = openlockstateid(s); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3452 | status = nfs4_check_fh(current_fh, stp); |
| 3453 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3454 | goto out; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3455 | if (stp->st_stateowner->so_is_open_owner |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3456 | && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3457 | goto out; |
J. Bruce Fields | a4455be | 2009-02-21 10:40:22 -0800 | [diff] [blame] | 3458 | status = nfs4_check_openmode(stp, flags); |
| 3459 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3460 | goto out; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 3461 | if (filpp) { |
| 3462 | if (flags & RD_STATE) |
| 3463 | *filpp = find_readable_file(stp->st_file); |
| 3464 | else |
| 3465 | *filpp = find_writeable_file(stp->st_file); |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 3466 | } |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3467 | break; |
| 3468 | default: |
| 3469 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3470 | } |
| 3471 | status = nfs_ok; |
| 3472 | out: |
| 3473 | return status; |
| 3474 | } |
| 3475 | |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3476 | static __be32 |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3477 | nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3478 | { |
J. Bruce Fields | 0e135af | 2014-05-20 15:55:21 -0400 | [diff] [blame] | 3479 | struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); |
| 3480 | |
| 3481 | if (check_for_locks(stp->st_file, lo)) |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3482 | return nfserr_locks_held; |
J. Bruce Fields | 0e135af | 2014-05-20 15:55:21 -0400 | [diff] [blame] | 3483 | /* |
| 3484 | * Currently there's a 1-1 lock stateid<->lockowner |
| 3485 | * correspondance, and we have to delete the lockowner when we |
| 3486 | * delete the lock stateid: |
| 3487 | */ |
J. Bruce Fields | 52e9d64 | 2014-05-27 11:14:26 -0400 | [diff] [blame] | 3488 | release_lockowner(lo); |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3489 | return nfs_ok; |
| 3490 | } |
| 3491 | |
| 3492 | /* |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 3493 | * Test if the stateid is valid |
| 3494 | */ |
| 3495 | __be32 |
| 3496 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 3497 | struct nfsd4_test_stateid *test_stateid) |
| 3498 | { |
Bryan Schumaker | 03cfb42 | 2012-01-27 10:22:49 -0500 | [diff] [blame] | 3499 | struct nfsd4_test_stateid_id *stateid; |
| 3500 | struct nfs4_client *cl = cstate->session->se_client; |
| 3501 | |
| 3502 | nfs4_lock_state(); |
| 3503 | list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) |
| 3504 | stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid); |
| 3505 | nfs4_unlock_state(); |
| 3506 | |
Bryan Schumaker | 1745680 | 2011-07-13 10:50:48 -0400 | [diff] [blame] | 3507 | return nfs_ok; |
| 3508 | } |
| 3509 | |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3510 | __be32 |
| 3511 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 3512 | struct nfsd4_free_stateid *free_stateid) |
| 3513 | { |
| 3514 | stateid_t *stateid = &free_stateid->fr_stateid; |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 3515 | struct nfs4_stid *s; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3516 | struct nfs4_client *cl = cstate->session->se_client; |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 3517 | __be32 ret = nfserr_bad_stateid; |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3518 | |
| 3519 | nfs4_lock_state(); |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3520 | s = find_stateid(cl, stateid); |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 3521 | if (!s) |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3522 | goto out; |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 3523 | switch (s->sc_type) { |
| 3524 | case NFS4_DELEG_STID: |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3525 | ret = nfserr_locks_held; |
| 3526 | goto out; |
J. Bruce Fields | 2da1cec | 2011-09-16 18:56:20 -0400 | [diff] [blame] | 3527 | case NFS4_OPEN_STID: |
| 3528 | case NFS4_LOCK_STID: |
| 3529 | ret = check_stateid_generation(stateid, &s->sc_stateid, 1); |
| 3530 | if (ret) |
| 3531 | goto out; |
| 3532 | if (s->sc_type == NFS4_LOCK_STID) |
| 3533 | ret = nfsd4_free_lock_stateid(openlockstateid(s)); |
| 3534 | else |
| 3535 | ret = nfserr_locks_held; |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3536 | break; |
| 3537 | default: |
| 3538 | ret = nfserr_bad_stateid; |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3539 | } |
Bryan Schumaker | e1ca12d | 2011-07-13 11:04:21 -0400 | [diff] [blame] | 3540 | out: |
| 3541 | nfs4_unlock_state(); |
| 3542 | return ret; |
| 3543 | } |
| 3544 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 3545 | static inline int |
| 3546 | setlkflg (int type) |
| 3547 | { |
| 3548 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? |
| 3549 | RD_STATE : WR_STATE; |
| 3550 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3551 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3552 | 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] | 3553 | { |
| 3554 | struct svc_fh *current_fh = &cstate->current_fh; |
| 3555 | struct nfs4_stateowner *sop = stp->st_stateowner; |
| 3556 | __be32 status; |
| 3557 | |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3558 | status = nfsd4_check_seqid(cstate, sop, seqid); |
| 3559 | if (status) |
| 3560 | return status; |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3561 | if (stp->st_stid.sc_type == NFS4_CLOSED_STID) |
| 3562 | /* |
| 3563 | * "Closed" stateid's exist *only* to return |
| 3564 | * nfserr_replay_me from the previous step. |
| 3565 | */ |
| 3566 | return nfserr_bad_stateid; |
| 3567 | status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); |
| 3568 | if (status) |
| 3569 | return status; |
| 3570 | return nfs4_check_fh(current_fh, stp); |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3571 | } |
| 3572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3573 | /* |
| 3574 | * Checks for sequence id mutating operations. |
| 3575 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3576 | static __be32 |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 3577 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
J. Bruce Fields | 2288d0e | 2011-09-06 15:50:21 -0400 | [diff] [blame] | 3578 | stateid_t *stateid, char typemask, |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3579 | struct nfs4_ol_stateid **stpp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3580 | { |
J. Bruce Fields | 0836f58 | 2008-01-26 19:08:12 -0500 | [diff] [blame] | 3581 | __be32 status; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3582 | struct nfs4_stid *s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3583 | |
Benny Halevy | 8c10cbd | 2009-10-19 12:04:53 +0200 | [diff] [blame] | 3584 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
| 3585 | seqid, STATEID_VAL(stateid)); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 3586 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3587 | *stpp = NULL; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3588 | status = nfsd4_lookup_stateid(stateid, typemask, &s); |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3589 | if (status) |
| 3590 | return status; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3591 | *stpp = openlockstateid(s); |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3592 | cstate->replay_owner = (*stpp)->st_stateowner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3593 | |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3594 | return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); |
| 3595 | } |
J. Bruce Fields | 39325bd | 2007-11-26 17:06:39 -0500 | [diff] [blame] | 3596 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3597 | static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3598 | { |
| 3599 | __be32 status; |
| 3600 | struct nfs4_openowner *oo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3601 | |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3602 | status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, |
J. Bruce Fields | 2288d0e | 2011-09-06 15:50:21 -0400 | [diff] [blame] | 3603 | NFS4_OPEN_STID, stpp); |
J. Bruce Fields | 7a8711c | 2011-09-02 09:03:37 -0400 | [diff] [blame] | 3604 | if (status) |
| 3605 | return status; |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3606 | oo = openowner((*stpp)->st_stateowner); |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3607 | if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 3608 | return nfserr_bad_stateid; |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 3609 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3610 | } |
| 3611 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3612 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3613 | 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] | 3614 | struct nfsd4_open_confirm *oc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3615 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3616 | __be32 status; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3617 | struct nfs4_openowner *oo; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3618 | struct nfs4_ol_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3619 | |
| 3620 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3621 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 3622 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3623 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3624 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
J. Bruce Fields | a8cddc5 | 2006-06-30 01:56:13 -0700 | [diff] [blame] | 3625 | if (status) |
| 3626 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3627 | |
| 3628 | nfs4_lock_state(); |
| 3629 | |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 3630 | status = nfs4_preprocess_seqid_op(cstate, |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3631 | oc->oc_seqid, &oc->oc_req_stateid, |
J. Bruce Fields | 2288d0e | 2011-09-06 15:50:21 -0400 | [diff] [blame] | 3632 | NFS4_OPEN_STID, &stp); |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 3633 | if (status) |
J. Bruce Fields | 68b66e8 | 2011-09-02 12:19:43 -0400 | [diff] [blame] | 3634 | goto out; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3635 | oo = openowner(stp->st_stateowner); |
J. Bruce Fields | 68b66e8 | 2011-09-02 12:19:43 -0400 | [diff] [blame] | 3636 | status = nfserr_bad_stateid; |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3637 | if (oo->oo_flags & NFS4_OO_CONFIRMED) |
J. Bruce Fields | 68b66e8 | 2011-09-02 12:19:43 -0400 | [diff] [blame] | 3638 | goto out; |
J. Bruce Fields | dad1c06 | 2011-09-12 12:24:13 -0400 | [diff] [blame] | 3639 | oo->oo_flags |= NFS4_OO_CONFIRMED; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3640 | update_stateid(&stp->st_stid.sc_stateid); |
| 3641 | 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] | 3642 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3643 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 3644 | |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 3645 | nfsd4_client_record_create(oo->oo_owner.so_client); |
J. Bruce Fields | 68b66e8 | 2011-09-02 12:19:43 -0400 | [diff] [blame] | 3646 | status = nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3647 | out: |
J. Bruce Fields | 5ec094c | 2011-08-30 17:02:48 -0400 | [diff] [blame] | 3648 | if (!cstate->replay_owner) |
| 3649 | nfs4_unlock_state(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3650 | return status; |
| 3651 | } |
| 3652 | |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 3653 | 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] | 3654 | { |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 3655 | if (!test_bit(access, &stp->st_access_bmap)) |
| 3656 | return; |
| 3657 | nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); |
| 3658 | __clear_bit(access, &stp->st_access_bmap); |
| 3659 | } |
J. Bruce Fields | f197c27 | 2011-06-29 08:23:50 -0400 | [diff] [blame] | 3660 | |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 3661 | static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) |
| 3662 | { |
| 3663 | switch (to_access) { |
| 3664 | case NFS4_SHARE_ACCESS_READ: |
| 3665 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); |
| 3666 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); |
| 3667 | break; |
| 3668 | case NFS4_SHARE_ACCESS_WRITE: |
| 3669 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); |
| 3670 | nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); |
| 3671 | break; |
| 3672 | case NFS4_SHARE_ACCESS_BOTH: |
| 3673 | break; |
| 3674 | default: |
| 3675 | BUG(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3676 | } |
| 3677 | } |
| 3678 | |
| 3679 | static void |
| 3680 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) |
| 3681 | { |
| 3682 | int i; |
| 3683 | for (i = 0; i < 4; i++) { |
| 3684 | if ((i & deny) != i) |
| 3685 | __clear_bit(i, bmap); |
| 3686 | } |
| 3687 | } |
| 3688 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3689 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3690 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
| 3691 | struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3692 | struct nfsd4_open_downgrade *od) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3693 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3694 | __be32 status; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3695 | struct nfs4_ol_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3696 | |
| 3697 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3698 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 3699 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3700 | |
J. Bruce Fields | c30e92d | 2011-10-10 17:34:31 -0400 | [diff] [blame] | 3701 | /* We don't yet support WANT bits: */ |
Benny Halevy | 2c8bd7e | 2012-02-16 20:57:09 +0200 | [diff] [blame] | 3702 | if (od->od_deleg_want) |
| 3703 | dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, |
| 3704 | od->od_deleg_want); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3705 | |
| 3706 | nfs4_lock_state(); |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 3707 | status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, |
| 3708 | &od->od_stateid, &stp); |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 3709 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3710 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3711 | status = nfserr_inval; |
| 3712 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { |
| 3713 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", |
| 3714 | stp->st_access_bmap, od->od_share_access); |
| 3715 | goto out; |
| 3716 | } |
| 3717 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { |
| 3718 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
| 3719 | stp->st_deny_bmap, od->od_share_deny); |
| 3720 | goto out; |
| 3721 | } |
J. Bruce Fields | 6409a5a | 2011-09-28 11:37:56 -0400 | [diff] [blame] | 3722 | nfs4_stateid_downgrade(stp, od->od_share_access); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3723 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3724 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
| 3725 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3726 | update_stateid(&stp->st_stid.sc_stateid); |
| 3727 | memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3728 | status = nfs_ok; |
| 3729 | out: |
J. Bruce Fields | 5ec094c | 2011-08-30 17:02:48 -0400 | [diff] [blame] | 3730 | if (!cstate->replay_owner) |
| 3731 | nfs4_unlock_state(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3732 | return status; |
| 3733 | } |
| 3734 | |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 3735 | void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) |
| 3736 | { |
| 3737 | struct nfs4_openowner *oo; |
| 3738 | struct nfs4_ol_stateid *s; |
| 3739 | |
| 3740 | if (!so->so_is_open_owner) |
| 3741 | return; |
| 3742 | oo = openowner(so); |
| 3743 | s = oo->oo_last_closed_stid; |
| 3744 | if (!s) |
| 3745 | return; |
| 3746 | if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { |
| 3747 | /* Release the last_closed_stid on the next seqid bump: */ |
| 3748 | oo->oo_flags |= NFS4_OO_PURGE_CLOSE; |
| 3749 | return; |
| 3750 | } |
| 3751 | oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3752 | release_last_closed_stateid(oo); |
| 3753 | } |
| 3754 | |
| 3755 | static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) |
| 3756 | { |
| 3757 | unhash_open_stateid(s); |
| 3758 | s->st_stid.sc_type = NFS4_CLOSED_STID; |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 3759 | } |
| 3760 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3761 | /* |
| 3762 | * nfs4_unlock_state() called after encode |
| 3763 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3764 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3765 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 3766 | struct nfsd4_close *close) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3767 | { |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3768 | __be32 status; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3769 | struct nfs4_openowner *oo; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3770 | struct nfs4_ol_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3771 | |
| 3772 | dprintk("NFSD: nfsd4_close on file %.*s\n", |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3773 | (int)cstate->current_fh.fh_dentry->d_name.len, |
| 3774 | cstate->current_fh.fh_dentry->d_name.name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3775 | |
| 3776 | nfs4_lock_state(); |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3777 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
| 3778 | &close->cl_stateid, |
| 3779 | NFS4_OPEN_STID|NFS4_CLOSED_STID, |
| 3780 | &stp); |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 3781 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3782 | goto out; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3783 | oo = openowner(stp->st_stateowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3784 | status = nfs_ok; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3785 | update_stateid(&stp->st_stid.sc_stateid); |
| 3786 | memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3787 | |
J. Bruce Fields | f7a4d87 | 2011-09-16 20:12:38 -0400 | [diff] [blame] | 3788 | nfsd4_close_open_stateid(stp); |
J. Bruce Fields | c8b90a0 | 2012-08-29 15:21:58 -0700 | [diff] [blame] | 3789 | release_last_closed_stateid(oo); |
J. Bruce Fields | 38c387b | 2011-09-16 17:42:48 -0400 | [diff] [blame] | 3790 | oo->oo_last_closed_stid = stp; |
J. Bruce Fields | 04ef595 | 2006-01-18 17:43:21 -0800 | [diff] [blame] | 3791 | |
| 3792 | /* place unused nfs4_stateowners on so_close_lru list to be |
| 3793 | * released by the laundromat service after the lease period |
| 3794 | * to enable us to handle CLOSE replay |
| 3795 | */ |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3796 | if (list_empty(&oo->oo_owner.so_stateids)) |
| 3797 | move_to_close_lru(oo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3798 | out: |
J. Bruce Fields | 5ec094c | 2011-08-30 17:02:48 -0400 | [diff] [blame] | 3799 | if (!cstate->replay_owner) |
| 3800 | nfs4_unlock_state(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3801 | return status; |
| 3802 | } |
| 3803 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3804 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3805 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 3806 | struct nfsd4_delegreturn *dr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3807 | { |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3808 | struct nfs4_delegation *dp; |
| 3809 | stateid_t *stateid = &dr->dr_stateid; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3810 | struct nfs4_stid *s; |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3811 | struct inode *inode; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 3812 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3813 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 3814 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3815 | return status; |
| 3816 | inode = cstate->current_fh.fh_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3817 | |
| 3818 | nfs4_lock_state(); |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3819 | status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); |
| 3820 | if (status) |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3821 | goto out; |
J. Bruce Fields | 38c2f4b | 2011-09-23 17:01:19 -0400 | [diff] [blame] | 3822 | dp = delegstateid(s); |
J. Bruce Fields | d5477a8 | 2011-09-08 12:07:44 -0400 | [diff] [blame] | 3823 | 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] | 3824 | if (status) |
| 3825 | goto out; |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3826 | |
| 3827 | unhash_delegation(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3828 | out: |
J. Bruce Fields | 203a8c8 | 2009-02-21 13:29:14 -0800 | [diff] [blame] | 3829 | nfs4_unlock_state(); |
| 3830 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3831 | return status; |
| 3832 | } |
| 3833 | |
| 3834 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3835 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3836 | |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3837 | #define LOCKOWNER_INO_HASH_BITS 8 |
| 3838 | #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) |
| 3839 | #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3840 | |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3841 | static inline u64 |
| 3842 | end_offset(u64 start, u64 len) |
| 3843 | { |
| 3844 | u64 end; |
| 3845 | |
| 3846 | end = start + len; |
| 3847 | return end >= start ? end: NFS4_MAX_UINT64; |
| 3848 | } |
| 3849 | |
| 3850 | /* last octet in a range */ |
| 3851 | static inline u64 |
| 3852 | last_byte_offset(u64 start, u64 len) |
| 3853 | { |
| 3854 | u64 end; |
| 3855 | |
| 3856 | BUG_ON(!len); |
| 3857 | end = start + len; |
| 3858 | return end > start ? end - 1: NFS4_MAX_UINT64; |
| 3859 | } |
| 3860 | |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3861 | 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] | 3862 | { |
| 3863 | return (file_hashval(inode) + cl_id |
| 3864 | + opaque_hashval(ownername->data, ownername->len)) |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3865 | & LOCKOWNER_INO_HASH_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3866 | } |
| 3867 | |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3868 | static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3869 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3870 | /* |
| 3871 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that |
| 3872 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th |
| 3873 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit |
| 3874 | * locking, this prevents us from being completely protocol-compliant. The |
| 3875 | * real solution to this problem is to start using unsigned file offsets in |
| 3876 | * the VFS, but this is a very deep change! |
| 3877 | */ |
| 3878 | static inline void |
| 3879 | nfs4_transform_lock_offset(struct file_lock *lock) |
| 3880 | { |
| 3881 | if (lock->fl_start < 0) |
| 3882 | lock->fl_start = OFFSET_MAX; |
| 3883 | if (lock->fl_end < 0) |
| 3884 | lock->fl_end = OFFSET_MAX; |
| 3885 | } |
| 3886 | |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3887 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
| 3888 | * as a unique cookie to identify our (NFSv4's) posix locks. */ |
Alexey Dobriyan | 7b02196 | 2009-09-21 17:01:12 -0700 | [diff] [blame] | 3889 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3890 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3891 | |
| 3892 | static inline void |
| 3893 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) |
| 3894 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3895 | struct nfs4_lockowner *lo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3896 | |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3897 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3898 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
| 3899 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, |
| 3900 | lo->lo_owner.so_owner.len, GFP_KERNEL); |
J. Bruce Fields | 7c13f34 | 2011-08-30 22:15:47 -0400 | [diff] [blame] | 3901 | if (!deny->ld_owner.data) |
| 3902 | /* We just don't care that much */ |
| 3903 | goto nevermind; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3904 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
| 3905 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3906 | } else { |
J. Bruce Fields | 7c13f34 | 2011-08-30 22:15:47 -0400 | [diff] [blame] | 3907 | nevermind: |
| 3908 | deny->ld_owner.len = 0; |
| 3909 | deny->ld_owner.data = NULL; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 3910 | deny->ld_clientid.cl_boot = 0; |
| 3911 | deny->ld_clientid.cl_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3912 | } |
| 3913 | deny->ld_start = fl->fl_start; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 3914 | deny->ld_length = NFS4_MAX_UINT64; |
| 3915 | if (fl->fl_end != NFS4_MAX_UINT64) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3916 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
| 3917 | deny->ld_type = NFS4_READ_LT; |
| 3918 | if (fl->fl_type != F_RDLCK) |
| 3919 | deny->ld_type = NFS4_WRITE_LT; |
| 3920 | } |
| 3921 | |
J. Bruce Fields | b93d87c | 2011-11-07 16:37:57 -0500 | [diff] [blame] | 3922 | static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) |
| 3923 | { |
| 3924 | struct nfs4_ol_stateid *lst; |
| 3925 | |
| 3926 | if (!same_owner_str(&lo->lo_owner, owner, clid)) |
| 3927 | return false; |
J. Bruce Fields | b03b892 | 2014-05-08 11:19:41 -0400 | [diff] [blame] | 3928 | if (list_empty(&lo->lo_owner.so_stateids)) { |
| 3929 | WARN_ON_ONCE(1); |
| 3930 | return false; |
| 3931 | } |
J. Bruce Fields | b93d87c | 2011-11-07 16:37:57 -0500 | [diff] [blame] | 3932 | lst = list_first_entry(&lo->lo_owner.so_stateids, |
| 3933 | struct nfs4_ol_stateid, st_perstateowner); |
| 3934 | return lst->st_file->fi_inode == inode; |
| 3935 | } |
| 3936 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3937 | static struct nfs4_lockowner * |
| 3938 | find_lockowner_str(struct inode *inode, clientid_t *clid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3939 | struct xdr_netobj *owner) |
| 3940 | { |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3941 | unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); |
J. Bruce Fields | b93d87c | 2011-11-07 16:37:57 -0500 | [diff] [blame] | 3942 | struct nfs4_lockowner *lo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3943 | |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3944 | list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { |
J. Bruce Fields | b93d87c | 2011-11-07 16:37:57 -0500 | [diff] [blame] | 3945 | if (same_lockowner_ino(lo, inode, clid, owner)) |
| 3946 | return lo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3947 | } |
| 3948 | return NULL; |
| 3949 | } |
| 3950 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3951 | 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] | 3952 | { |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3953 | struct inode *inode = open_stp->st_file->fi_inode; |
| 3954 | unsigned int inohash = lockowner_ino_hashval(inode, |
| 3955 | clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); |
| 3956 | |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 3957 | list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 3958 | list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3959 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); |
J. Bruce Fields | ff194bd | 2011-08-12 09:42:57 -0400 | [diff] [blame] | 3960 | } |
| 3961 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3962 | /* |
| 3963 | * Alloc a lock owner structure. |
| 3964 | * 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] | 3965 | * occurred. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3966 | * |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 3967 | * strhashval = ownerstr_hashval |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3968 | */ |
| 3969 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3970 | static struct nfs4_lockowner * |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3971 | 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] | 3972 | struct nfs4_lockowner *lo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3973 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3974 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
| 3975 | if (!lo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3976 | return NULL; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3977 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
| 3978 | lo->lo_owner.so_is_open_owner = 0; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 3979 | /* It is the openowner seqid that will be incremented in encode in the |
| 3980 | * case of new lockowners; so increment the lock seqid manually: */ |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3981 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
| 3982 | hash_lockowner(lo, strhashval, clp, open_stp); |
| 3983 | return lo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3984 | } |
| 3985 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3986 | static struct nfs4_ol_stateid * |
| 3987 | 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] | 3988 | { |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 3989 | struct nfs4_ol_stateid *stp; |
J. Bruce Fields | d3b313a | 2011-09-15 15:02:41 -0400 | [diff] [blame] | 3990 | struct nfs4_client *clp = lo->lo_owner.so_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3991 | |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 3992 | stp = nfs4_alloc_stateid(clp); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 3993 | if (stp == NULL) |
J. Bruce Fields | 6136d2b | 2011-09-23 16:21:15 -0400 | [diff] [blame] | 3994 | return NULL; |
J. Bruce Fields | 996e093 | 2011-10-17 11:14:48 -0400 | [diff] [blame] | 3995 | init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 3996 | list_add(&stp->st_perfile, &fp->fi_stateids); |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 3997 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
| 3998 | stp->st_stateowner = &lo->lo_owner; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 3999 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4000 | stp->st_file = fp; |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 4001 | stp->st_access_bmap = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4002 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 4003 | stp->st_openstp = open_stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4004 | return stp; |
| 4005 | } |
| 4006 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 4007 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4008 | check_lock_length(u64 offset, u64 length) |
| 4009 | { |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 4010 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4011 | LOFF_OVERFLOW(offset, length))); |
| 4012 | } |
| 4013 | |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4014 | 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] | 4015 | { |
| 4016 | struct nfs4_file *fp = lock_stp->st_file; |
| 4017 | int oflag = nfs4_access_to_omode(access); |
| 4018 | |
| 4019 | if (test_bit(access, &lock_stp->st_access_bmap)) |
| 4020 | return; |
| 4021 | nfs4_file_get_access(fp, oflag); |
| 4022 | __set_bit(access, &lock_stp->st_access_bmap); |
| 4023 | } |
| 4024 | |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4025 | __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) |
| 4026 | { |
| 4027 | struct nfs4_file *fi = ost->st_file; |
| 4028 | struct nfs4_openowner *oo = openowner(ost->st_stateowner); |
| 4029 | struct nfs4_client *cl = oo->oo_owner.so_client; |
| 4030 | struct nfs4_lockowner *lo; |
| 4031 | unsigned int strhashval; |
| 4032 | |
| 4033 | lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); |
| 4034 | if (lo) { |
| 4035 | if (!cstate->minorversion) |
| 4036 | return nfserr_bad_seqid; |
| 4037 | /* XXX: a lockowner always has exactly one stateid: */ |
| 4038 | *lst = list_first_entry(&lo->lo_owner.so_stateids, |
| 4039 | struct nfs4_ol_stateid, st_perstateowner); |
| 4040 | return nfs_ok; |
| 4041 | } |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 4042 | strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4043 | &lock->v.new.owner); |
| 4044 | lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); |
| 4045 | if (lo == NULL) |
| 4046 | return nfserr_jukebox; |
| 4047 | *lst = alloc_init_lock_stateid(lo, fi, ost); |
| 4048 | if (*lst == NULL) { |
| 4049 | release_lockowner(lo); |
| 4050 | return nfserr_jukebox; |
| 4051 | } |
| 4052 | *new = true; |
| 4053 | return nfs_ok; |
| 4054 | } |
| 4055 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4056 | /* |
| 4057 | * LOCK operation |
| 4058 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4059 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 4060 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 4061 | struct nfsd4_lock *lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4062 | { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4063 | struct nfs4_openowner *open_sop = NULL; |
| 4064 | struct nfs4_lockowner *lock_sop = NULL; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4065 | struct nfs4_ol_stateid *lock_stp; |
J. Bruce Fields | 7d94784 | 2010-08-20 18:09:31 -0400 | [diff] [blame] | 4066 | struct nfs4_file *fp; |
| 4067 | struct file *filp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4068 | struct file_lock file_lock; |
Andy Adamson | 8dc7c31 | 2006-03-20 13:44:26 -0500 | [diff] [blame] | 4069 | struct file_lock conflock; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4070 | __be32 status = 0; |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4071 | bool new_state = false; |
J. Bruce Fields | b34f27a | 2011-08-22 13:13:31 -0400 | [diff] [blame] | 4072 | int lkflg; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 4073 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4074 | |
| 4075 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", |
| 4076 | (long long) lock->lk_offset, |
| 4077 | (long long) lock->lk_length); |
| 4078 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4079 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
| 4080 | return nfserr_inval; |
| 4081 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 4082 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 4083 | S_IFREG, NFSD_MAY_LOCK))) { |
Andy Adamson | a6f6ef2 | 2006-01-18 17:43:17 -0800 | [diff] [blame] | 4084 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
| 4085 | return status; |
| 4086 | } |
| 4087 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4088 | nfs4_lock_state(); |
| 4089 | |
| 4090 | if (lock->lk_is_new) { |
NeilBrown | 893f877 | 2005-07-07 17:59:17 -0700 | [diff] [blame] | 4091 | /* |
| 4092 | * Client indicates that this is a new lockowner. |
| 4093 | * Use open owner and open stateid to create lock owner and |
| 4094 | * lock stateid. |
| 4095 | */ |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4096 | struct nfs4_ol_stateid *open_stp = NULL; |
J. Bruce Fields | 684e563 | 2011-11-04 17:08:10 -0400 | [diff] [blame] | 4097 | |
| 4098 | if (nfsd4_has_session(cstate)) |
| 4099 | /* See rfc 5661 18.10.3: given clientid is ignored: */ |
| 4100 | memcpy(&lock->v.new.clientid, |
| 4101 | &cstate->session->se_client->cl_clientid, |
| 4102 | sizeof(clientid_t)); |
| 4103 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4104 | status = nfserr_stale_clientid; |
J. Bruce Fields | 684e563 | 2011-11-04 17:08:10 -0400 | [diff] [blame] | 4105 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4106 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4108 | /* validate and update open stateid and open seqid */ |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 4109 | status = nfs4_preprocess_confirmed_seqid_op(cstate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4110 | lock->lk_new_open_seqid, |
| 4111 | &lock->lk_new_open_stateid, |
J. Bruce Fields | c0a5d93 | 2011-09-06 15:19:46 -0400 | [diff] [blame] | 4112 | &open_stp); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 4113 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4114 | goto out; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4115 | open_sop = openowner(open_stp->st_stateowner); |
J. Bruce Fields | b34f27a | 2011-08-22 13:13:31 -0400 | [diff] [blame] | 4116 | status = nfserr_bad_stateid; |
J. Bruce Fields | 684e563 | 2011-11-04 17:08:10 -0400 | [diff] [blame] | 4117 | if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
J. Bruce Fields | b34f27a | 2011-08-22 13:13:31 -0400 | [diff] [blame] | 4118 | &lock->v.new.clientid)) |
| 4119 | goto out; |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4120 | status = lookup_or_create_lock_state(cstate, open_stp, lock, |
| 4121 | &lock_stp, &new_state); |
| 4122 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4123 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4124 | } else { |
| 4125 | /* lock (lock owner + lock stateid) already exists */ |
Benny Halevy | dd453df | 2009-04-03 08:28:41 +0300 | [diff] [blame] | 4126 | status = nfs4_preprocess_seqid_op(cstate, |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4127 | lock->lk_old_lock_seqid, |
| 4128 | &lock->lk_old_lock_stateid, |
J. Bruce Fields | 2288d0e | 2011-09-06 15:50:21 -0400 | [diff] [blame] | 4129 | NFS4_LOCK_STID, &lock_stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4130 | if (status) |
| 4131 | goto out; |
| 4132 | } |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4133 | lock_sop = lockowner(lock_stp->st_stateowner); |
| 4134 | fp = lock_stp->st_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4135 | |
J. Bruce Fields | b34f27a | 2011-08-22 13:13:31 -0400 | [diff] [blame] | 4136 | lkflg = setlkflg(lock->lk_type); |
| 4137 | status = nfs4_check_openmode(lock_stp, lkflg); |
| 4138 | if (status) |
| 4139 | goto out; |
| 4140 | |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 4141 | status = nfserr_grace; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 4142 | if (locks_in_grace() && !lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 4143 | goto out; |
| 4144 | status = nfserr_no_grace; |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 4145 | if (!locks_in_grace() && lock->lk_reclaim) |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 4146 | goto out; |
| 4147 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4148 | locks_init_lock(&file_lock); |
| 4149 | switch (lock->lk_type) { |
| 4150 | case NFS4_READ_LT: |
| 4151 | case NFS4_READW_LT: |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 4152 | filp = find_readable_file(lock_stp->st_file); |
| 4153 | if (filp) |
| 4154 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4155 | file_lock.fl_type = F_RDLCK; |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 4156 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4157 | case NFS4_WRITE_LT: |
| 4158 | case NFS4_WRITEW_LT: |
J. Bruce Fields | 0997b17 | 2011-03-02 18:01:35 -0500 | [diff] [blame] | 4159 | filp = find_writeable_file(lock_stp->st_file); |
| 4160 | if (filp) |
| 4161 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4162 | file_lock.fl_type = F_WRLCK; |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 4163 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4164 | default: |
| 4165 | status = nfserr_inval; |
| 4166 | goto out; |
| 4167 | } |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 4168 | if (!filp) { |
| 4169 | status = nfserr_openmode; |
| 4170 | goto out; |
| 4171 | } |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 4172 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4173 | file_lock.fl_pid = current->tgid; |
| 4174 | file_lock.fl_file = filp; |
| 4175 | file_lock.fl_flags = FL_POSIX; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 4176 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4177 | |
| 4178 | file_lock.fl_start = lock->lk_offset; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 4179 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4180 | nfs4_transform_lock_offset(&file_lock); |
| 4181 | |
| 4182 | /* |
| 4183 | * Try to lock the file in the VFS. |
| 4184 | * Note: locks.c uses the BKL to protect the inode's lock list. |
| 4185 | */ |
| 4186 | |
J. Bruce Fields | 529d7b2 | 2011-03-02 23:48:33 -0500 | [diff] [blame] | 4187 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 4188 | switch (-err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4189 | case 0: /* success! */ |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4190 | update_stateid(&lock_stp->st_stid.sc_stateid); |
| 4191 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4192 | sizeof(stateid_t)); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 4193 | status = 0; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 4194 | break; |
| 4195 | case (EAGAIN): /* conflock holds conflicting lock */ |
| 4196 | status = nfserr_denied; |
| 4197 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); |
| 4198 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); |
| 4199 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4200 | case (EDEADLK): |
| 4201 | status = nfserr_deadlock; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 4202 | break; |
J. Bruce Fields | 3e77246 | 2011-08-10 19:07:33 -0400 | [diff] [blame] | 4203 | default: |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 4204 | 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] | 4205 | status = nfserrno(err); |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 4206 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4207 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4208 | out: |
J. Bruce Fields | 64a284d | 2011-10-20 06:57:46 -0400 | [diff] [blame] | 4209 | if (status && new_state) |
J. Bruce Fields | f044ff8 | 2009-01-11 15:24:04 -0500 | [diff] [blame] | 4210 | release_lockowner(lock_sop); |
J. Bruce Fields | 5ec094c | 2011-08-30 17:02:48 -0400 | [diff] [blame] | 4211 | if (!cstate->replay_owner) |
| 4212 | nfs4_unlock_state(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4213 | return status; |
| 4214 | } |
| 4215 | |
| 4216 | /* |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 4217 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, |
| 4218 | * so we do a temporary open here just to get an open file to pass to |
| 4219 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an |
| 4220 | * inode operation.) |
| 4221 | */ |
Al Viro | 04da6e9 | 2012-04-13 00:00:04 -0400 | [diff] [blame] | 4222 | 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] | 4223 | { |
| 4224 | struct file *file; |
Al Viro | 04da6e9 | 2012-04-13 00:00:04 -0400 | [diff] [blame] | 4225 | __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); |
| 4226 | if (!err) { |
| 4227 | err = nfserrno(vfs_test_lock(file, lock)); |
| 4228 | nfsd_close(file); |
| 4229 | } |
J. Bruce Fields | 55ef127 | 2008-12-20 11:58:38 -0800 | [diff] [blame] | 4230 | return err; |
| 4231 | } |
| 4232 | |
| 4233 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4234 | * LOCKT operation |
| 4235 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4236 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 4237 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
| 4238 | struct nfsd4_lockt *lockt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4239 | { |
| 4240 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4241 | struct file_lock file_lock; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4242 | struct nfs4_lockowner *lo; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4243 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4244 | |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 4245 | if (locks_in_grace()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4246 | return nfserr_grace; |
| 4247 | |
| 4248 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) |
| 4249 | return nfserr_inval; |
| 4250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4251 | nfs4_lock_state(); |
| 4252 | |
| 4253 | status = nfserr_stale_clientid; |
Andy Adamson | 60adfc5 | 2009-04-03 08:28:50 +0300 | [diff] [blame] | 4254 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4255 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4256 | |
J. Bruce Fields | 75c096f | 2011-08-15 18:39:32 -0400 | [diff] [blame] | 4257 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4258 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4259 | |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 4260 | inode = cstate->current_fh.fh_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4261 | locks_init_lock(&file_lock); |
| 4262 | switch (lockt->lt_type) { |
| 4263 | case NFS4_READ_LT: |
| 4264 | case NFS4_READW_LT: |
| 4265 | file_lock.fl_type = F_RDLCK; |
| 4266 | break; |
| 4267 | case NFS4_WRITE_LT: |
| 4268 | case NFS4_WRITEW_LT: |
| 4269 | file_lock.fl_type = F_WRLCK; |
| 4270 | break; |
| 4271 | default: |
J. Bruce Fields | 2fdada0 | 2007-07-27 16:10:37 -0400 | [diff] [blame] | 4272 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4273 | status = nfserr_inval; |
| 4274 | goto out; |
| 4275 | } |
| 4276 | |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4277 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
| 4278 | if (lo) |
| 4279 | file_lock.fl_owner = (fl_owner_t)lo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4280 | file_lock.fl_pid = current->tgid; |
| 4281 | file_lock.fl_flags = FL_POSIX; |
| 4282 | |
| 4283 | file_lock.fl_start = lockt->lt_offset; |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 4284 | 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] | 4285 | |
| 4286 | nfs4_transform_lock_offset(&file_lock); |
| 4287 | |
Al Viro | 04da6e9 | 2012-04-13 00:00:04 -0400 | [diff] [blame] | 4288 | status = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
| 4289 | if (status) |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 4290 | goto out; |
Al Viro | 04da6e9 | 2012-04-13 00:00:04 -0400 | [diff] [blame] | 4291 | |
Marc Eshel | 9d6a8c5 | 2007-02-21 00:55:18 -0500 | [diff] [blame] | 4292 | if (file_lock.fl_type != F_UNLCK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4293 | status = nfserr_denied; |
Marc Eshel | 9d6a8c5 | 2007-02-21 00:55:18 -0500 | [diff] [blame] | 4294 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4295 | } |
| 4296 | out: |
| 4297 | nfs4_unlock_state(); |
| 4298 | return status; |
| 4299 | } |
| 4300 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4301 | __be32 |
J.Bruce Fields | ca36431 | 2006-12-13 00:35:27 -0800 | [diff] [blame] | 4302 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
J.Bruce Fields | a4f1706a9 | 2006-12-13 00:35:28 -0800 | [diff] [blame] | 4303 | struct nfsd4_locku *locku) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4304 | { |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4305 | struct nfs4_ol_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4306 | struct file *filp = NULL; |
| 4307 | struct file_lock file_lock; |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4308 | __be32 status; |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 4309 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4310 | |
| 4311 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
| 4312 | (long long) locku->lu_offset, |
| 4313 | (long long) locku->lu_length); |
| 4314 | |
| 4315 | if (check_lock_length(locku->lu_offset, locku->lu_length)) |
| 4316 | return nfserr_inval; |
| 4317 | |
| 4318 | nfs4_lock_state(); |
| 4319 | |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 4320 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
J. Bruce Fields | 2288d0e | 2011-09-06 15:50:21 -0400 | [diff] [blame] | 4321 | &locku->lu_stateid, NFS4_LOCK_STID, &stp); |
J. Bruce Fields | 9072d5c | 2011-08-24 12:45:03 -0400 | [diff] [blame] | 4322 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4323 | goto out; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 4324 | filp = find_any_file(stp->st_file); |
| 4325 | if (!filp) { |
| 4326 | status = nfserr_lock_range; |
| 4327 | goto out; |
| 4328 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4329 | BUG_ON(!filp); |
| 4330 | locks_init_lock(&file_lock); |
| 4331 | file_lock.fl_type = F_UNLCK; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4332 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4333 | file_lock.fl_pid = current->tgid; |
| 4334 | file_lock.fl_file = filp; |
| 4335 | file_lock.fl_flags = FL_POSIX; |
NeilBrown | d5b9026 | 2006-04-10 22:55:22 -0700 | [diff] [blame] | 4336 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4337 | file_lock.fl_start = locku->lu_offset; |
| 4338 | |
Benny Halevy | 87df4de | 2008-12-15 19:42:03 +0200 | [diff] [blame] | 4339 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4340 | nfs4_transform_lock_offset(&file_lock); |
| 4341 | |
| 4342 | /* |
| 4343 | * Try to unlock the file in the VFS. |
| 4344 | */ |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 4345 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 4346 | if (err) { |
Marc Eshel | fd85b81 | 2006-11-28 16:26:41 -0500 | [diff] [blame] | 4347 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4348 | goto out_nfserr; |
| 4349 | } |
| 4350 | /* |
| 4351 | * OK, unlock succeeded; the only thing left to do is update the stateid. |
| 4352 | */ |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4353 | update_stateid(&stp->st_stid.sc_stateid); |
| 4354 | memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4355 | |
| 4356 | out: |
J. Bruce Fields | 71c3bcd | 2011-09-27 21:42:29 -0400 | [diff] [blame] | 4357 | if (!cstate->replay_owner) |
| 4358 | nfs4_unlock_state(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4359 | return status; |
| 4360 | |
| 4361 | out_nfserr: |
Al Viro | b8dd7b9 | 2006-10-19 23:29:01 -0700 | [diff] [blame] | 4362 | status = nfserrno(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4363 | goto out; |
| 4364 | } |
| 4365 | |
| 4366 | /* |
| 4367 | * returns |
| 4368 | * 1: locks held by lockowner |
| 4369 | * 0: no locks held by lockowner |
| 4370 | */ |
| 4371 | static int |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4372 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4373 | { |
| 4374 | struct file_lock **flpp; |
J. Bruce Fields | f9d7562 | 2010-07-08 11:02:09 -0400 | [diff] [blame] | 4375 | struct inode *inode = filp->fi_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4376 | int status = 0; |
| 4377 | |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 4378 | lock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4379 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 4380 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4381 | status = 1; |
| 4382 | goto out; |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 4383 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4384 | } |
| 4385 | out: |
Arnd Bergmann | b89f432 | 2010-09-18 15:09:31 +0200 | [diff] [blame] | 4386 | unlock_flocks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4387 | return status; |
| 4388 | } |
| 4389 | |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4390 | __be32 |
J.Bruce Fields | b591480 | 2006-12-13 00:35:38 -0800 | [diff] [blame] | 4391 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
| 4392 | struct nfsd4_compound_state *cstate, |
| 4393 | struct nfsd4_release_lockowner *rlockowner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4394 | { |
| 4395 | clientid_t *clid = &rlockowner->rl_clientid; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 4396 | struct nfs4_stateowner *sop; |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4397 | struct nfs4_lockowner *lo; |
J. Bruce Fields | dcef041 | 2011-09-07 16:06:42 -0400 | [diff] [blame] | 4398 | struct nfs4_ol_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4399 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 4400 | struct list_head matches; |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 4401 | unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4402 | __be32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4403 | |
| 4404 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", |
| 4405 | clid->cl_boot, clid->cl_id); |
| 4406 | |
| 4407 | /* XXX check for lease expiration */ |
| 4408 | |
| 4409 | status = nfserr_stale_clientid; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 4410 | if (STALE_CLIENTID(clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4411 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4412 | |
| 4413 | nfs4_lock_state(); |
| 4414 | |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 4415 | status = nfserr_locks_held; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 4416 | INIT_LIST_HEAD(&matches); |
J. Bruce Fields | 06f1f86 | 2011-11-07 16:58:18 -0500 | [diff] [blame] | 4417 | |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 4418 | list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { |
| 4419 | if (sop->so_is_open_owner) |
| 4420 | continue; |
J. Bruce Fields | 06f1f86 | 2011-11-07 16:58:18 -0500 | [diff] [blame] | 4421 | if (!same_owner_str(sop, owner, clid)) |
| 4422 | continue; |
| 4423 | list_for_each_entry(stp, &sop->so_stateids, |
| 4424 | st_perstateowner) { |
| 4425 | lo = lockowner(sop); |
| 4426 | if (check_for_locks(stp->st_file, lo)) |
| 4427 | goto out; |
| 4428 | list_add(&lo->lo_list, &matches); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4429 | } |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 4430 | } |
| 4431 | /* Clients probably won't expect us to return with some (but not all) |
| 4432 | * of the lockowner state released; so don't release any until all |
| 4433 | * have been checked. */ |
| 4434 | status = nfs_ok; |
NeilBrown | 0fa822e | 2005-07-07 17:59:14 -0700 | [diff] [blame] | 4435 | while (!list_empty(&matches)) { |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4436 | lo = list_entry(matches.next, struct nfs4_lockowner, |
| 4437 | lo_list); |
NeilBrown | 0fa822e | 2005-07-07 17:59:14 -0700 | [diff] [blame] | 4438 | /* unhash_stateowner deletes so_perclient only |
| 4439 | * for openowners. */ |
J. Bruce Fields | fe0750e | 2011-07-30 23:33:59 -0400 | [diff] [blame] | 4440 | list_del(&lo->lo_list); |
| 4441 | release_lockowner(lo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4442 | } |
| 4443 | out: |
| 4444 | nfs4_unlock_state(); |
| 4445 | return status; |
| 4446 | } |
| 4447 | |
| 4448 | static inline struct nfs4_client_reclaim * |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 4449 | alloc_reclaim(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4450 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 4451 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4452 | } |
| 4453 | |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 4454 | int |
Andy Adamson | a1bcecd | 2009-04-03 08:28:05 +0300 | [diff] [blame] | 4455 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 4456 | { |
| 4457 | unsigned int strhashval = clientstr_hashval(name); |
| 4458 | struct nfs4_client *clp; |
| 4459 | |
J. Bruce Fields | e203d50 | 2010-11-24 17:30:54 -0500 | [diff] [blame] | 4460 | clp = find_confirmed_client_by_str(name, strhashval); |
J. Bruce Fields | 393d8ed | 2012-03-06 14:43:36 -0500 | [diff] [blame] | 4461 | if (!clp) |
| 4462 | return 0; |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 4463 | return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 4464 | } |
| 4465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4466 | /* |
| 4467 | * failure => all reset bets are off, nfserr_no_grace... |
| 4468 | */ |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 4469 | int |
| 4470 | nfs4_client_to_reclaim(const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4471 | { |
| 4472 | unsigned int strhashval; |
| 4473 | struct nfs4_client_reclaim *crp = NULL; |
| 4474 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 4475 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
| 4476 | crp = alloc_reclaim(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4477 | if (!crp) |
| 4478 | return 0; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 4479 | strhashval = clientstr_hashval(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4480 | INIT_LIST_HEAD(&crp->cr_strhash); |
| 4481 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 4482 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4483 | reclaim_str_hashtbl_size++; |
| 4484 | return 1; |
| 4485 | } |
| 4486 | |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 4487 | void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4488 | nfs4_release_reclaim(void) |
| 4489 | { |
| 4490 | struct nfs4_client_reclaim *crp = NULL; |
| 4491 | int i; |
| 4492 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4493 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 4494 | while (!list_empty(&reclaim_str_hashtbl[i])) { |
| 4495 | crp = list_entry(reclaim_str_hashtbl[i].next, |
| 4496 | struct nfs4_client_reclaim, cr_strhash); |
| 4497 | list_del(&crp->cr_strhash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4498 | kfree(crp); |
| 4499 | reclaim_str_hashtbl_size--; |
| 4500 | } |
| 4501 | } |
| 4502 | BUG_ON(reclaim_str_hashtbl_size); |
| 4503 | } |
| 4504 | |
| 4505 | /* |
| 4506 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 4507 | struct nfs4_client_reclaim * |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 4508 | nfsd4_find_reclaim_client(struct nfs4_client *clp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4509 | { |
| 4510 | unsigned int strhashval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4511 | struct nfs4_client_reclaim *crp = NULL; |
| 4512 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 4513 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
| 4514 | clp->cl_name.len, clp->cl_name.data, |
| 4515 | clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4516 | |
| 4517 | /* find clp->cl_name in reclaim_str_hashtbl */ |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 4518 | strhashval = clientstr_hashval(clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4519 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 4520 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4521 | return crp; |
| 4522 | } |
| 4523 | } |
| 4524 | return NULL; |
| 4525 | } |
| 4526 | |
| 4527 | /* |
| 4528 | * Called from OPEN. Look for clientid in reclaim list. |
| 4529 | */ |
Al Viro | b37ad28 | 2006-10-19 23:28:59 -0700 | [diff] [blame] | 4530 | __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4531 | nfs4_check_open_reclaim(clientid_t *clid) |
| 4532 | { |
Jeff Layton | a52d726 | 2012-03-21 09:52:02 -0400 | [diff] [blame] | 4533 | struct nfs4_client *clp; |
| 4534 | |
| 4535 | /* find clientid in conf_id_hashtbl */ |
| 4536 | clp = find_confirmed_client(clid); |
| 4537 | if (clp == NULL) |
| 4538 | return nfserr_reclaim_bad; |
| 4539 | |
| 4540 | return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4541 | } |
| 4542 | |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4543 | #ifdef CONFIG_NFSD_FAULT_INJECTION |
| 4544 | |
| 4545 | void nfsd_forget_clients(u64 num) |
| 4546 | { |
| 4547 | struct nfs4_client *clp, *next; |
| 4548 | int count = 0; |
| 4549 | |
| 4550 | nfs4_lock_state(); |
| 4551 | list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 4552 | nfsd4_client_record_remove(clp); |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4553 | expire_client(clp); |
| 4554 | if (++count == num) |
| 4555 | break; |
| 4556 | } |
| 4557 | nfs4_unlock_state(); |
| 4558 | |
| 4559 | printk(KERN_INFO "NFSD: Forgot %d clients", count); |
| 4560 | } |
| 4561 | |
| 4562 | static void release_lockowner_sop(struct nfs4_stateowner *sop) |
| 4563 | { |
| 4564 | release_lockowner(lockowner(sop)); |
| 4565 | } |
| 4566 | |
| 4567 | static void release_openowner_sop(struct nfs4_stateowner *sop) |
| 4568 | { |
| 4569 | release_openowner(openowner(sop)); |
| 4570 | } |
| 4571 | |
J. Bruce Fields | 353de31 | 2011-11-15 19:25:03 -0500 | [diff] [blame] | 4572 | static int nfsd_release_n_owners(u64 num, bool is_open_owner, |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4573 | void (*release_sop)(struct nfs4_stateowner *)) |
| 4574 | { |
| 4575 | int i, count = 0; |
| 4576 | struct nfs4_stateowner *sop, *next; |
| 4577 | |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 4578 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
| 4579 | list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { |
| 4580 | if (sop->so_is_open_owner != is_open_owner) |
| 4581 | continue; |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4582 | release_sop(sop); |
| 4583 | if (++count == num) |
| 4584 | return count; |
| 4585 | } |
| 4586 | } |
| 4587 | return count; |
| 4588 | } |
| 4589 | |
| 4590 | void nfsd_forget_locks(u64 num) |
| 4591 | { |
| 4592 | int count; |
| 4593 | |
| 4594 | nfs4_lock_state(); |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 4595 | count = nfsd_release_n_owners(num, false, release_lockowner_sop); |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4596 | nfs4_unlock_state(); |
| 4597 | |
| 4598 | printk(KERN_INFO "NFSD: Forgot %d locks", count); |
| 4599 | } |
| 4600 | |
| 4601 | void nfsd_forget_openowners(u64 num) |
| 4602 | { |
| 4603 | int count; |
| 4604 | |
| 4605 | nfs4_lock_state(); |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 4606 | count = nfsd_release_n_owners(num, true, release_openowner_sop); |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4607 | nfs4_unlock_state(); |
| 4608 | |
| 4609 | printk(KERN_INFO "NFSD: Forgot %d open owners", count); |
| 4610 | } |
| 4611 | |
| 4612 | int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) |
| 4613 | { |
| 4614 | int i, count = 0; |
Bryan Schumaker | 2d3475c | 2011-12-14 14:39:56 -0500 | [diff] [blame] | 4615 | struct nfs4_file *fp, *fnext; |
| 4616 | struct nfs4_delegation *dp, *dnext; |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4617 | |
| 4618 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
Bryan Schumaker | 2d3475c | 2011-12-14 14:39:56 -0500 | [diff] [blame] | 4619 | list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { |
| 4620 | list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4621 | deleg_func(dp); |
| 4622 | if (++count == num) |
| 4623 | return count; |
| 4624 | } |
| 4625 | } |
| 4626 | } |
Bryan Schumaker | 2d3475c | 2011-12-14 14:39:56 -0500 | [diff] [blame] | 4627 | |
Bryan Schumaker | 65178db | 2011-11-01 13:35:21 -0400 | [diff] [blame] | 4628 | return count; |
| 4629 | } |
| 4630 | |
| 4631 | void nfsd_forget_delegations(u64 num) |
| 4632 | { |
| 4633 | unsigned int count; |
| 4634 | |
| 4635 | nfs4_lock_state(); |
| 4636 | count = nfsd_process_n_delegations(num, unhash_delegation); |
| 4637 | nfs4_unlock_state(); |
| 4638 | |
| 4639 | printk(KERN_INFO "NFSD: Forgot %d delegations", count); |
| 4640 | } |
| 4641 | |
| 4642 | void nfsd_recall_delegations(u64 num) |
| 4643 | { |
| 4644 | unsigned int count; |
| 4645 | |
| 4646 | nfs4_lock_state(); |
| 4647 | spin_lock(&recall_lock); |
| 4648 | count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); |
| 4649 | spin_unlock(&recall_lock); |
| 4650 | nfs4_unlock_state(); |
| 4651 | |
| 4652 | printk(KERN_INFO "NFSD: Recalled %d delegations", count); |
| 4653 | } |
| 4654 | |
| 4655 | #endif /* CONFIG_NFSD_FAULT_INJECTION */ |
| 4656 | |
NeilBrown | ac4d8ff | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4657 | /* initialization to perform at module load time: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4658 | |
Bryan Schumaker | 7208339 | 2011-11-01 15:24:59 -0400 | [diff] [blame] | 4659 | void |
NeilBrown | ac4d8ff | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4660 | nfs4_state_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4661 | { |
Bryan Schumaker | 7208339 | 2011-11-01 15:24:59 -0400 | [diff] [blame] | 4662 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4664 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 4665 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); |
| 4666 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); |
| 4667 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); |
| 4668 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); |
Wang Chen | 02cb285 | 2009-04-24 15:41:57 +0800 | [diff] [blame] | 4669 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4670 | } |
Marc Eshel | 5282fd7 | 2009-04-03 08:27:52 +0300 | [diff] [blame] | 4671 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
| 4672 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4673 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
| 4674 | INIT_LIST_HEAD(&file_hashtbl[i]); |
| 4675 | } |
J. Bruce Fields | 16bfdaaf | 2011-11-07 17:23:30 -0500 | [diff] [blame] | 4676 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
| 4677 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4678 | } |
J. Bruce Fields | 009673b | 2011-11-07 17:40:10 -0500 | [diff] [blame] | 4679 | for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) |
| 4680 | INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4681 | INIT_LIST_HEAD(&close_lru); |
| 4682 | INIT_LIST_HEAD(&client_lru); |
| 4683 | INIT_LIST_HEAD(&del_recall_lru); |
NeilBrown | ac4d8ff | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4684 | reclaim_str_hashtbl_size = 0; |
NeilBrown | ac4d8ff | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4685 | } |
| 4686 | |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 4687 | /* |
| 4688 | * Since the lifetime of a delegation isn't limited to that of an open, a |
| 4689 | * client may quite reasonably hang on to a delegation as long as it has |
| 4690 | * the inode cached. This becomes an obvious problem the first time a |
| 4691 | * client's inode cache approaches the size of the server's total memory. |
| 4692 | * |
| 4693 | * For now we avoid this problem by imposing a hard limit on the number |
| 4694 | * of delegations, which varies according to the server's memory size. |
| 4695 | */ |
| 4696 | static void |
| 4697 | set_max_delegations(void) |
| 4698 | { |
| 4699 | /* |
| 4700 | * Allow at most 4 delegations per megabyte of RAM. Quick |
| 4701 | * estimates suggest that in the worst case (where every delegation |
| 4702 | * is for a different inode), a delegation could take about 1.5K, |
| 4703 | * giving a worst case usage of about 6% of memory. |
| 4704 | */ |
| 4705 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); |
| 4706 | } |
| 4707 | |
NeilBrown | ac4d8ff | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4708 | /* initialization to perform when the nfsd service is started: */ |
| 4709 | |
Jeff Layton | a6d6b78 | 2012-03-05 11:42:36 -0500 | [diff] [blame] | 4710 | int |
| 4711 | nfs4_state_start(void) |
NeilBrown | ac4d8ff | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 4712 | { |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4713 | int ret; |
| 4714 | |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 4715 | /* |
| 4716 | * FIXME: For now, we hang most of the pernet global stuff off of |
| 4717 | * init_net until nfsd is fully containerized. Eventually, we'll |
| 4718 | * need to pass a net pointer into this function, take a reference |
| 4719 | * to that instead and then do most of the rest of this on a per-net |
| 4720 | * basis. |
| 4721 | */ |
| 4722 | get_net(&init_net); |
| 4723 | nfsd4_client_tracking_init(&init_net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4724 | boot_time = get_seconds(); |
J. Bruce Fields | af558e3 | 2007-09-06 12:34:25 -0400 | [diff] [blame] | 4725 | locks_start_grace(&nfsd4_manager); |
Marc Eshel | 9a8db97 | 2007-07-17 04:04:35 -0700 | [diff] [blame] | 4726 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
J. Bruce Fields | e46b498 | 2010-03-01 19:21:21 -0500 | [diff] [blame] | 4727 | nfsd4_grace); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4728 | ret = set_callback_cred(); |
Jeff Layton | a6d6b78 | 2012-03-05 11:42:36 -0500 | [diff] [blame] | 4729 | if (ret) { |
| 4730 | ret = -ENOMEM; |
| 4731 | goto out_recovery; |
| 4732 | } |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 4733 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
Jeff Layton | a6d6b78 | 2012-03-05 11:42:36 -0500 | [diff] [blame] | 4734 | if (laundry_wq == NULL) { |
| 4735 | ret = -ENOMEM; |
| 4736 | goto out_recovery; |
| 4737 | } |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4738 | ret = nfsd4_create_callback_queue(); |
| 4739 | if (ret) |
| 4740 | goto out_free_laundry; |
J. Bruce Fields | e46b498 | 2010-03-01 19:21:21 -0500 | [diff] [blame] | 4741 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
Meelap Shah | c2f1a55 | 2007-07-17 04:04:39 -0700 | [diff] [blame] | 4742 | set_max_delegations(); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4743 | return 0; |
| 4744 | out_free_laundry: |
| 4745 | destroy_workqueue(laundry_wq); |
Jeff Layton | a6d6b78 | 2012-03-05 11:42:36 -0500 | [diff] [blame] | 4746 | out_recovery: |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 4747 | nfsd4_client_tracking_exit(&init_net); |
| 4748 | put_net(&init_net); |
J. Bruce Fields | b5a1a81 | 2010-03-03 14:52:55 -0500 | [diff] [blame] | 4749 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4750 | } |
| 4751 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4752 | static void |
| 4753 | __nfs4_state_shutdown(void) |
| 4754 | { |
| 4755 | int i; |
| 4756 | struct nfs4_client *clp = NULL; |
| 4757 | struct nfs4_delegation *dp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4758 | struct list_head *pos, *next, reaplist; |
| 4759 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4760 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 4761 | while (!list_empty(&conf_id_hashtbl[i])) { |
| 4762 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); |
| 4763 | expire_client(clp); |
| 4764 | } |
| 4765 | while (!list_empty(&unconf_str_hashtbl[i])) { |
| 4766 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); |
| 4767 | expire_client(clp); |
| 4768 | } |
| 4769 | } |
| 4770 | INIT_LIST_HEAD(&reaplist); |
| 4771 | spin_lock(&recall_lock); |
| 4772 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 4773 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 4774 | list_move(&dp->dl_recall_lru, &reaplist); |
| 4775 | } |
| 4776 | spin_unlock(&recall_lock); |
| 4777 | list_for_each_safe(pos, next, &reaplist) { |
| 4778 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4779 | unhash_delegation(dp); |
| 4780 | } |
| 4781 | |
Jeff Layton | 2a4317c | 2012-03-21 16:42:43 -0400 | [diff] [blame] | 4782 | nfsd4_client_tracking_exit(&init_net); |
| 4783 | put_net(&init_net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4784 | } |
| 4785 | |
| 4786 | void |
| 4787 | nfs4_state_shutdown(void) |
| 4788 | { |
Tejun Heo | afe2c51 | 2010-12-14 16:21:17 +0100 | [diff] [blame] | 4789 | cancel_delayed_work_sync(&laundromat_work); |
NeilBrown | 5e8d5c2 | 2006-04-10 22:55:37 -0700 | [diff] [blame] | 4790 | destroy_workqueue(laundry_wq); |
J. Bruce Fields | 2c5e761 | 2008-11-20 14:36:17 -0600 | [diff] [blame] | 4791 | locks_end_grace(&nfsd4_manager); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4792 | nfs4_lock_state(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4793 | __nfs4_state_shutdown(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4794 | nfs4_unlock_state(); |
J. Bruce Fields | c3935e3 | 2010-06-04 16:42:08 -0400 | [diff] [blame] | 4795 | nfsd4_destroy_callback_queue(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4796 | } |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 4797 | |
| 4798 | static void |
| 4799 | get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) |
| 4800 | { |
Tigran Mkrtchyan | 37c593c | 2012-02-13 22:55:32 +0100 | [diff] [blame] | 4801 | if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) |
| 4802 | memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 4803 | } |
| 4804 | |
| 4805 | static void |
| 4806 | put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) |
| 4807 | { |
Tigran Mkrtchyan | 37c593c | 2012-02-13 22:55:32 +0100 | [diff] [blame] | 4808 | if (cstate->minorversion) { |
| 4809 | memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); |
| 4810 | SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); |
| 4811 | } |
| 4812 | } |
| 4813 | |
| 4814 | void |
| 4815 | clear_current_stateid(struct nfsd4_compound_state *cstate) |
| 4816 | { |
| 4817 | CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 4818 | } |
| 4819 | |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 4820 | /* |
| 4821 | * functions to set current state id |
| 4822 | */ |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 4823 | void |
Tigran Mkrtchyan | 9428fe1 | 2012-02-13 22:55:31 +0100 | [diff] [blame] | 4824 | nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) |
| 4825 | { |
| 4826 | put_stateid(cstate, &odp->od_stateid); |
| 4827 | } |
| 4828 | |
| 4829 | void |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 4830 | nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) |
| 4831 | { |
| 4832 | put_stateid(cstate, &open->op_stateid); |
| 4833 | } |
| 4834 | |
| 4835 | void |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 4836 | nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) |
| 4837 | { |
| 4838 | put_stateid(cstate, &close->cl_stateid); |
| 4839 | } |
| 4840 | |
| 4841 | void |
| 4842 | nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) |
| 4843 | { |
| 4844 | put_stateid(cstate, &lock->lk_resp_stateid); |
| 4845 | } |
| 4846 | |
| 4847 | /* |
| 4848 | * functions to consume current state id |
| 4849 | */ |
Tigran Mkrtchyan | 1e97b51 | 2012-02-13 22:55:30 +0100 | [diff] [blame] | 4850 | |
| 4851 | void |
Tigran Mkrtchyan | 9428fe1 | 2012-02-13 22:55:31 +0100 | [diff] [blame] | 4852 | nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) |
| 4853 | { |
| 4854 | get_stateid(cstate, &odp->od_stateid); |
| 4855 | } |
| 4856 | |
| 4857 | void |
| 4858 | nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) |
| 4859 | { |
| 4860 | get_stateid(cstate, &drp->dr_stateid); |
| 4861 | } |
| 4862 | |
| 4863 | void |
Tigran Mkrtchyan | 1e97b51 | 2012-02-13 22:55:30 +0100 | [diff] [blame] | 4864 | nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) |
| 4865 | { |
| 4866 | get_stateid(cstate, &fsp->fr_stateid); |
| 4867 | } |
| 4868 | |
| 4869 | void |
| 4870 | nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) |
| 4871 | { |
| 4872 | get_stateid(cstate, &setattr->sa_stateid); |
| 4873 | } |
| 4874 | |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 4875 | void |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 4876 | nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) |
| 4877 | { |
| 4878 | get_stateid(cstate, &close->cl_stateid); |
| 4879 | } |
| 4880 | |
| 4881 | void |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 4882 | nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 4883 | { |
Tigran Mkrtchyan | 62cd4a5 | 2012-02-13 22:55:25 +0100 | [diff] [blame] | 4884 | get_stateid(cstate, &locku->lu_stateid); |
Tigran Mkrtchyan | 8b70484 | 2012-02-13 22:55:24 +0100 | [diff] [blame] | 4885 | } |
Tigran Mkrtchyan | 30813e2 | 2012-02-13 22:55:26 +0100 | [diff] [blame] | 4886 | |
| 4887 | void |
| 4888 | nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) |
| 4889 | { |
| 4890 | get_stateid(cstate, &read->rd_stateid); |
| 4891 | } |
| 4892 | |
| 4893 | void |
| 4894 | nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) |
| 4895 | { |
| 4896 | get_stateid(cstate, &write->wr_stateid); |
| 4897 | } |