Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
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 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
68e76ad0 | 41 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 42 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 43 | #include "xdr4.h" |
0a3adade | 44 | #include "vfs.h" |
1da177e4 LT |
45 | |
46 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
47 | ||
48 | /* Globals */ | |
cf07d2ea | 49 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 50 | time_t nfsd4_grace = 90; |
fd39ca9a | 51 | static time_t boot_time; |
1da177e4 LT |
52 | static u32 current_ownerid = 1; |
53 | static u32 current_fileid = 1; | |
54 | static u32 current_delegid = 1; | |
fd39ca9a N |
55 | static stateid_t zerostateid; /* bits all 0 */ |
56 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 57 | static u64 current_sessionid = 1; |
fd39ca9a N |
58 | |
59 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
60 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 61 | |
1da177e4 | 62 | /* forward declarations */ |
fd39ca9a | 63 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
e1ca12df | 64 | static struct nfs4_delegation * search_for_delegation(stateid_t *stid); |
1da177e4 | 65 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
fe0750e5 | 66 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); |
1da177e4 | 67 | |
8b671b80 BF |
68 | /* Locking: */ |
69 | ||
70 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 71 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 72 | |
8b671b80 BF |
73 | /* |
74 | * Currently used for the del_recall_lru and file hash table. In an | |
75 | * effort to decrease the scope of the client_mutex, this spinlock may | |
76 | * eventually cover more: | |
77 | */ | |
78 | static DEFINE_SPINLOCK(recall_lock); | |
79 | ||
fe0750e5 BF |
80 | static struct kmem_cache *openowner_slab = NULL; |
81 | static struct kmem_cache *lockowner_slab = NULL; | |
e18b890b CL |
82 | static struct kmem_cache *file_slab = NULL; |
83 | static struct kmem_cache *stateid_slab = NULL; | |
84 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 85 | |
1da177e4 LT |
86 | void |
87 | nfs4_lock_state(void) | |
88 | { | |
353ab6e9 | 89 | mutex_lock(&client_mutex); |
1da177e4 LT |
90 | } |
91 | ||
92 | void | |
93 | nfs4_unlock_state(void) | |
94 | { | |
353ab6e9 | 95 | mutex_unlock(&client_mutex); |
1da177e4 LT |
96 | } |
97 | ||
98 | static inline u32 | |
99 | opaque_hashval(const void *ptr, int nbytes) | |
100 | { | |
101 | unsigned char *cptr = (unsigned char *) ptr; | |
102 | ||
103 | u32 x = 0; | |
104 | while (nbytes--) { | |
105 | x *= 37; | |
106 | x += *cptr++; | |
107 | } | |
108 | return x; | |
109 | } | |
110 | ||
1da177e4 LT |
111 | static struct list_head del_recall_lru; |
112 | ||
13cd2184 N |
113 | static inline void |
114 | put_nfs4_file(struct nfs4_file *fi) | |
115 | { | |
8b671b80 BF |
116 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
117 | list_del(&fi->fi_hash); | |
118 | spin_unlock(&recall_lock); | |
119 | iput(fi->fi_inode); | |
120 | kmem_cache_free(file_slab, fi); | |
121 | } | |
13cd2184 N |
122 | } |
123 | ||
124 | static inline void | |
125 | get_nfs4_file(struct nfs4_file *fi) | |
126 | { | |
8b671b80 | 127 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
128 | } |
129 | ||
ef0f3390 | 130 | static int num_delegations; |
c2f1a551 | 131 | unsigned int max_delegations; |
ef0f3390 N |
132 | |
133 | /* | |
134 | * Open owner state (share locks) | |
135 | */ | |
136 | ||
506f275f BF |
137 | /* hash tables for open owners */ |
138 | #define OPEN_OWNER_HASH_BITS 8 | |
139 | #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS) | |
140 | #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1) | |
ef0f3390 | 141 | |
506f275f | 142 | static unsigned int open_ownerid_hashval(const u32 id) |
ddc04c41 | 143 | { |
506f275f | 144 | return id & OPEN_OWNER_HASH_MASK; |
ddc04c41 BF |
145 | } |
146 | ||
506f275f | 147 | static unsigned int open_ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) |
ddc04c41 BF |
148 | { |
149 | unsigned int ret; | |
150 | ||
151 | ret = opaque_hashval(ownername->data, ownername->len); | |
152 | ret += clientid; | |
506f275f | 153 | return ret & OPEN_OWNER_HASH_MASK; |
ddc04c41 | 154 | } |
ef0f3390 | 155 | |
506f275f BF |
156 | static struct list_head open_ownerid_hashtbl[OPEN_OWNER_HASH_SIZE]; |
157 | static struct list_head open_ownerstr_hashtbl[OPEN_OWNER_HASH_SIZE]; | |
ef0f3390 N |
158 | |
159 | /* hash table for nfs4_file */ | |
160 | #define FILE_HASH_BITS 8 | |
161 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 162 | |
ef0f3390 N |
163 | /* hash table for (open)nfs4_stateid */ |
164 | #define STATEID_HASH_BITS 10 | |
165 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
166 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
167 | ||
ddc04c41 BF |
168 | static unsigned int file_hashval(struct inode *ino) |
169 | { | |
170 | /* XXX: why are we hashing on inode pointer, anyway? */ | |
171 | return hash_ptr(ino, FILE_HASH_BITS); | |
172 | } | |
173 | ||
174 | static unsigned int stateid_hashval(u32 owner_id, u32 file_id) | |
175 | { | |
176 | return (owner_id + file_id) & STATEID_HASH_MASK; | |
177 | } | |
ef0f3390 N |
178 | |
179 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
180 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
181 | ||
998db52c | 182 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
183 | { |
184 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
185 | atomic_inc(&fp->fi_access[oflag]); | |
186 | } | |
187 | ||
998db52c BF |
188 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
189 | { | |
190 | if (oflag == O_RDWR) { | |
191 | __nfs4_file_get_access(fp, O_RDONLY); | |
192 | __nfs4_file_get_access(fp, O_WRONLY); | |
193 | } else | |
194 | __nfs4_file_get_access(fp, oflag); | |
195 | } | |
196 | ||
197 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
198 | { |
199 | if (fp->fi_fds[oflag]) { | |
200 | fput(fp->fi_fds[oflag]); | |
201 | fp->fi_fds[oflag] = NULL; | |
202 | } | |
203 | } | |
204 | ||
998db52c | 205 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
206 | { |
207 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
208 | nfs4_file_put_fd(fp, O_RDWR); | |
209 | nfs4_file_put_fd(fp, oflag); | |
210 | } | |
211 | } | |
212 | ||
998db52c BF |
213 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
214 | { | |
215 | if (oflag == O_RDWR) { | |
216 | __nfs4_file_put_access(fp, O_RDONLY); | |
217 | __nfs4_file_put_access(fp, O_WRONLY); | |
218 | } else | |
219 | __nfs4_file_put_access(fp, oflag); | |
220 | } | |
221 | ||
1da177e4 LT |
222 | static struct nfs4_delegation * |
223 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
224 | { | |
225 | struct nfs4_delegation *dp; | |
226 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
227 | |
228 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
229 | /* |
230 | * Major work on the lease subsystem (for example, to support | |
231 | * calbacks on stat) will be required before we can support | |
232 | * write delegations properly. | |
233 | */ | |
234 | if (type != NFS4_OPEN_DELEGATE_READ) | |
235 | return NULL; | |
47f9940c MS |
236 | if (fp->fi_had_conflict) |
237 | return NULL; | |
c2f1a551 | 238 | if (num_delegations > max_delegations) |
ef0f3390 | 239 | return NULL; |
5b2d21c1 N |
240 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
241 | if (dp == NULL) | |
1da177e4 | 242 | return dp; |
ef0f3390 | 243 | num_delegations++; |
ea1da636 N |
244 | INIT_LIST_HEAD(&dp->dl_perfile); |
245 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
246 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
247 | dp->dl_client = clp; | |
13cd2184 | 248 | get_nfs4_file(fp); |
1da177e4 | 249 | dp->dl_file = fp; |
1da177e4 | 250 | dp->dl_type = type; |
e4e83ea4 | 251 | dp->dl_stateid.si_boot = boot_time; |
1da177e4 LT |
252 | dp->dl_stateid.si_stateownerid = current_delegid++; |
253 | dp->dl_stateid.si_fileid = 0; | |
73997dc4 | 254 | dp->dl_stateid.si_generation = 1; |
6c02eaa1 | 255 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
256 | dp->dl_time = 0; |
257 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 258 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
259 | return dp; |
260 | } | |
261 | ||
262 | void | |
263 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
264 | { | |
265 | if (atomic_dec_and_test(&dp->dl_count)) { | |
266 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 267 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 268 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 269 | num_delegations--; |
1da177e4 LT |
270 | } |
271 | } | |
272 | ||
acfdf5c3 | 273 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 274 | { |
acfdf5c3 BF |
275 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
276 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
277 | fp->fi_lease = NULL; | |
4ee63624 | 278 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
279 | fp->fi_deleg_file = NULL; |
280 | } | |
1da177e4 LT |
281 | } |
282 | ||
283 | /* Called under the state lock. */ | |
284 | static void | |
285 | unhash_delegation(struct nfs4_delegation *dp) | |
286 | { | |
ea1da636 | 287 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 288 | spin_lock(&recall_lock); |
5d926e8c | 289 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
290 | list_del_init(&dp->dl_recall_lru); |
291 | spin_unlock(&recall_lock); | |
acfdf5c3 | 292 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
293 | nfs4_put_delegation(dp); |
294 | } | |
295 | ||
296 | /* | |
297 | * SETCLIENTID state | |
298 | */ | |
299 | ||
36acb66b | 300 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
301 | static DEFINE_SPINLOCK(client_lock); |
302 | ||
1da177e4 LT |
303 | /* Hash tables for nfs4_clientid state */ |
304 | #define CLIENT_HASH_BITS 4 | |
305 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
306 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
307 | ||
ddc04c41 BF |
308 | static unsigned int clientid_hashval(u32 id) |
309 | { | |
310 | return id & CLIENT_HASH_MASK; | |
311 | } | |
312 | ||
313 | static unsigned int clientstr_hashval(const char *name) | |
314 | { | |
315 | return opaque_hashval(name, 8) & CLIENT_HASH_MASK; | |
316 | } | |
317 | ||
1da177e4 LT |
318 | /* |
319 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
320 | * used in reboot/reset lease grace period processing | |
321 | * | |
322 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
323 | * setclientid_confirmed info. | |
324 | * | |
325 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
326 | * setclientid info. | |
327 | * | |
328 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
329 | * for lease renewal. | |
330 | * | |
331 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
332 | * for last close replay. | |
333 | */ | |
334 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
335 | static int reclaim_str_hashtbl_size = 0; | |
336 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
337 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
338 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
339 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
340 | static struct list_head client_lru; | |
341 | static struct list_head close_lru; | |
342 | ||
f9d7562f BF |
343 | /* |
344 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
345 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
346 | * only what share bits are currently in force, but also what | |
347 | * combinations of share bits previous opens have used. This allows us | |
348 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
349 | * return an error if the client attempt to downgrade to a combination | |
350 | * of share bits not explicable by closing some of its previous opens. | |
351 | * | |
352 | * XXX: This enforcement is actually incomplete, since we don't keep | |
353 | * track of access/deny bit combinations; so, e.g., we allow: | |
354 | * | |
355 | * OPEN allow read, deny write | |
356 | * OPEN allow both, deny none | |
357 | * DOWNGRADE allow read, deny none | |
358 | * | |
359 | * which we should reject. | |
360 | */ | |
361 | static void | |
362 | set_access(unsigned int *access, unsigned long bmap) { | |
363 | int i; | |
364 | ||
365 | *access = 0; | |
366 | for (i = 1; i < 4; i++) { | |
367 | if (test_bit(i, &bmap)) | |
368 | *access |= i; | |
369 | } | |
370 | } | |
371 | ||
372 | static void | |
373 | set_deny(unsigned int *deny, unsigned long bmap) { | |
374 | int i; | |
375 | ||
376 | *deny = 0; | |
377 | for (i = 0; i < 4; i++) { | |
378 | if (test_bit(i, &bmap)) | |
379 | *deny |= i ; | |
380 | } | |
381 | } | |
382 | ||
383 | static int | |
384 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
385 | unsigned int access, deny; | |
386 | ||
387 | set_access(&access, stp->st_access_bmap); | |
388 | set_deny(&deny, stp->st_deny_bmap); | |
389 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
390 | return 0; | |
391 | return 1; | |
392 | } | |
393 | ||
394 | static int nfs4_access_to_omode(u32 access) | |
395 | { | |
8f34a430 | 396 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
397 | case NFS4_SHARE_ACCESS_READ: |
398 | return O_RDONLY; | |
399 | case NFS4_SHARE_ACCESS_WRITE: | |
400 | return O_WRONLY; | |
401 | case NFS4_SHARE_ACCESS_BOTH: | |
402 | return O_RDWR; | |
403 | } | |
404 | BUG(); | |
405 | } | |
406 | ||
529d7b2a BF |
407 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
408 | { | |
409 | list_del(&stp->st_hash); | |
410 | list_del(&stp->st_perfile); | |
411 | list_del(&stp->st_perstateowner); | |
412 | } | |
413 | ||
4665e2ba | 414 | static void close_generic_stateid(struct nfs4_stateid *stp) |
529d7b2a | 415 | { |
499f3edc | 416 | int i; |
0997b173 | 417 | |
23fcf2ec | 418 | if (stp->st_access_bmap) { |
499f3edc BF |
419 | for (i = 1; i < 4; i++) { |
420 | if (test_bit(i, &stp->st_access_bmap)) | |
421 | nfs4_file_put_access(stp->st_file, | |
422 | nfs4_access_to_omode(i)); | |
4665e2ba | 423 | __clear_bit(i, &stp->st_access_bmap); |
499f3edc | 424 | } |
23fcf2ec | 425 | } |
a96e5b90 | 426 | put_nfs4_file(stp->st_file); |
4665e2ba BF |
427 | stp->st_file = NULL; |
428 | } | |
429 | ||
430 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
431 | { | |
432 | close_generic_stateid(stp); | |
529d7b2a BF |
433 | kmem_cache_free(stateid_slab, stp); |
434 | } | |
435 | ||
436 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
437 | { | |
438 | struct file *file; | |
439 | ||
440 | unhash_generic_stateid(stp); | |
441 | file = find_any_file(stp->st_file); | |
442 | if (file) | |
fe0750e5 | 443 | locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); |
529d7b2a BF |
444 | free_generic_stateid(stp); |
445 | } | |
446 | ||
fe0750e5 | 447 | static void unhash_lockowner(struct nfs4_lockowner *lo) |
529d7b2a BF |
448 | { |
449 | struct nfs4_stateid *stp; | |
450 | ||
fe0750e5 BF |
451 | list_del(&lo->lo_owner.so_idhash); |
452 | list_del(&lo->lo_owner.so_strhash); | |
453 | list_del(&lo->lo_perstateid); | |
454 | while (!list_empty(&lo->lo_owner.so_stateids)) { | |
455 | stp = list_first_entry(&lo->lo_owner.so_stateids, | |
529d7b2a BF |
456 | struct nfs4_stateid, st_perstateowner); |
457 | release_lock_stateid(stp); | |
458 | } | |
459 | } | |
460 | ||
fe0750e5 | 461 | static void release_lockowner(struct nfs4_lockowner *lo) |
529d7b2a | 462 | { |
fe0750e5 BF |
463 | unhash_lockowner(lo); |
464 | nfs4_free_lockowner(lo); | |
529d7b2a BF |
465 | } |
466 | ||
467 | static void | |
468 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
469 | { | |
fe0750e5 | 470 | struct nfs4_lockowner *lo; |
529d7b2a BF |
471 | |
472 | while (!list_empty(&open_stp->st_lockowners)) { | |
fe0750e5 BF |
473 | lo = list_entry(open_stp->st_lockowners.next, |
474 | struct nfs4_lockowner, lo_perstateid); | |
475 | release_lockowner(lo); | |
529d7b2a BF |
476 | } |
477 | } | |
478 | ||
2283963f BF |
479 | static void release_open_stateid(struct nfs4_stateid *stp) |
480 | { | |
481 | unhash_generic_stateid(stp); | |
482 | release_stateid_lockowners(stp); | |
2283963f BF |
483 | free_generic_stateid(stp); |
484 | } | |
485 | ||
fe0750e5 | 486 | static void unhash_openowner(struct nfs4_openowner *oo) |
f1d110ca BF |
487 | { |
488 | struct nfs4_stateid *stp; | |
489 | ||
fe0750e5 BF |
490 | list_del(&oo->oo_owner.so_idhash); |
491 | list_del(&oo->oo_owner.so_strhash); | |
492 | list_del(&oo->oo_perclient); | |
493 | while (!list_empty(&oo->oo_owner.so_stateids)) { | |
494 | stp = list_first_entry(&oo->oo_owner.so_stateids, | |
f044ff83 BF |
495 | struct nfs4_stateid, st_perstateowner); |
496 | release_open_stateid(stp); | |
f1d110ca BF |
497 | } |
498 | } | |
499 | ||
fe0750e5 | 500 | static void release_openowner(struct nfs4_openowner *oo) |
f1d110ca | 501 | { |
fe0750e5 BF |
502 | unhash_openowner(oo); |
503 | list_del(&oo->oo_close_lru); | |
504 | nfs4_free_openowner(oo); | |
f1d110ca BF |
505 | } |
506 | ||
5282fd72 ME |
507 | #define SESSION_HASH_SIZE 512 |
508 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
509 | ||
510 | static inline int | |
511 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
512 | { | |
513 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
514 | ||
515 | return sid->sequence % SESSION_HASH_SIZE; | |
516 | } | |
517 | ||
518 | static inline void | |
519 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
520 | { | |
521 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
522 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
523 | } | |
524 | ||
ec6b5d7b AA |
525 | static void |
526 | gen_sessionid(struct nfsd4_session *ses) | |
527 | { | |
528 | struct nfs4_client *clp = ses->se_client; | |
529 | struct nfsd4_sessionid *sid; | |
530 | ||
531 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
532 | sid->clientid = clp->cl_clientid; | |
533 | sid->sequence = current_sessionid++; | |
534 | sid->reserved = 0; | |
535 | } | |
536 | ||
537 | /* | |
a649637c AA |
538 | * The protocol defines ca_maxresponssize_cached to include the size of |
539 | * the rpc header, but all we need to cache is the data starting after | |
540 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
541 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
542 | * value that is the number of bytes in our cache plus a few additional | |
543 | * bytes. In order to stay on the safe side, and not promise more than | |
544 | * we can cache, those additional bytes must be the minimum possible: 24 | |
545 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
546 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
547 | * for the SEQUENCE op response: | |
548 | */ | |
549 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
550 | ||
557ce264 AA |
551 | static void |
552 | free_session_slots(struct nfsd4_session *ses) | |
553 | { | |
554 | int i; | |
555 | ||
556 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
557 | kfree(ses->se_slots[i]); | |
558 | } | |
559 | ||
a649637c | 560 | /* |
efe0cb6d BF |
561 | * We don't actually need to cache the rpc and session headers, so we |
562 | * can allocate a little less for each slot: | |
563 | */ | |
564 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
565 | { | |
566 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
567 | } | |
568 | ||
5b6feee9 | 569 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 570 | { |
5b6feee9 BF |
571 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
572 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 573 | |
5b6feee9 BF |
574 | return size; |
575 | } | |
ec6b5d7b | 576 | |
5b6feee9 BF |
577 | /* |
578 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
579 | * re-negotiate active sessions and reduce their slot usage to make |
580 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 581 | */ |
5b6feee9 | 582 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 583 | { |
5b6feee9 | 584 | int avail; |
ec6b5d7b | 585 | |
5b6feee9 | 586 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 587 | |
5b6feee9 BF |
588 | spin_lock(&nfsd_drc_lock); |
589 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
590 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
591 | num = min_t(int, num, avail / slotsize); | |
592 | nfsd_drc_mem_used += num * slotsize; | |
593 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 594 | |
5b6feee9 BF |
595 | return num; |
596 | } | |
ec6b5d7b | 597 | |
5b6feee9 BF |
598 | static void nfsd4_put_drc_mem(int slotsize, int num) |
599 | { | |
4bd9b0f4 | 600 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 601 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 602 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 603 | } |
ec6b5d7b | 604 | |
5b6feee9 BF |
605 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
606 | { | |
607 | struct nfsd4_session *new; | |
608 | int mem, i; | |
a649637c | 609 | |
5b6feee9 BF |
610 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
611 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
612 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 613 | |
5b6feee9 BF |
614 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
615 | if (!new) | |
616 | return NULL; | |
557ce264 | 617 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
618 | for (i = 0; i < numslots; i++) { |
619 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
620 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
621 | if (!new->se_slots[i]) | |
557ce264 | 622 | goto out_free; |
557ce264 | 623 | } |
5b6feee9 BF |
624 | return new; |
625 | out_free: | |
626 | while (i--) | |
627 | kfree(new->se_slots[i]); | |
628 | kfree(new); | |
629 | return NULL; | |
ec6b5d7b AA |
630 | } |
631 | ||
5b6feee9 | 632 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 633 | { |
5b6feee9 | 634 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 635 | |
5b6feee9 | 636 | new->maxreqs = numslots; |
d2b21743 MJ |
637 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
638 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
639 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
640 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
641 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
642 | } | |
ec6b5d7b | 643 | |
19cf5c02 BF |
644 | static void free_conn(struct nfsd4_conn *c) |
645 | { | |
646 | svc_xprt_put(c->cn_xprt); | |
647 | kfree(c); | |
648 | } | |
ec6b5d7b | 649 | |
19cf5c02 BF |
650 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
651 | { | |
652 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
653 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 654 | |
19cf5c02 BF |
655 | spin_lock(&clp->cl_lock); |
656 | if (!list_empty(&c->cn_persession)) { | |
657 | list_del(&c->cn_persession); | |
658 | free_conn(c); | |
659 | } | |
660 | spin_unlock(&clp->cl_lock); | |
eea49806 | 661 | nfsd4_probe_callback(clp); |
19cf5c02 | 662 | } |
ec6b5d7b | 663 | |
d29c374c | 664 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 665 | { |
c7662518 | 666 | struct nfsd4_conn *conn; |
ec6b5d7b | 667 | |
c7662518 BF |
668 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
669 | if (!conn) | |
db90681d | 670 | return NULL; |
c7662518 BF |
671 | svc_xprt_get(rqstp->rq_xprt); |
672 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 673 | conn->cn_flags = flags; |
db90681d BF |
674 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
675 | return conn; | |
676 | } | |
a649637c | 677 | |
328ead28 BF |
678 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
679 | { | |
680 | conn->cn_session = ses; | |
681 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
682 | } |
683 | ||
db90681d | 684 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 685 | { |
db90681d | 686 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 687 | |
c7662518 | 688 | spin_lock(&clp->cl_lock); |
328ead28 | 689 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 690 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
691 | } |
692 | ||
21b75b01 | 693 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 694 | { |
19cf5c02 | 695 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 696 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
697 | } |
698 | ||
1d1bc8f2 | 699 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 700 | { |
db90681d | 701 | struct nfsd4_conn *conn; |
21b75b01 | 702 | int ret; |
ec6b5d7b | 703 | |
1d1bc8f2 | 704 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
705 | if (!conn) |
706 | return nfserr_jukebox; | |
707 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
708 | ret = nfsd4_register_conn(conn); |
709 | if (ret) | |
710 | /* oops; xprt is already down: */ | |
711 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
712 | return nfs_ok; |
713 | } | |
ec6b5d7b | 714 | |
1d1bc8f2 BF |
715 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
716 | { | |
717 | u32 dir = NFS4_CDFC4_FORE; | |
718 | ||
719 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
720 | dir |= NFS4_CDFC4_BACK; | |
721 | ||
722 | return nfsd4_new_conn(rqstp, ses, dir); | |
723 | } | |
724 | ||
725 | /* must be called under client_lock */ | |
19cf5c02 | 726 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 727 | { |
19cf5c02 BF |
728 | struct nfs4_client *clp = s->se_client; |
729 | struct nfsd4_conn *c; | |
ec6b5d7b | 730 | |
19cf5c02 BF |
731 | spin_lock(&clp->cl_lock); |
732 | while (!list_empty(&s->se_conns)) { | |
733 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
734 | list_del_init(&c->cn_persession); | |
735 | spin_unlock(&clp->cl_lock); | |
557ce264 | 736 | |
19cf5c02 BF |
737 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
738 | free_conn(c); | |
ec6b5d7b | 739 | |
19cf5c02 BF |
740 | spin_lock(&clp->cl_lock); |
741 | } | |
742 | spin_unlock(&clp->cl_lock); | |
c7662518 | 743 | } |
ec6b5d7b | 744 | |
c7662518 BF |
745 | void free_session(struct kref *kref) |
746 | { | |
747 | struct nfsd4_session *ses; | |
748 | int mem; | |
749 | ||
750 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 751 | nfsd4_del_conns(ses); |
c7662518 BF |
752 | spin_lock(&nfsd_drc_lock); |
753 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
754 | nfsd_drc_mem_used -= mem; | |
755 | spin_unlock(&nfsd_drc_lock); | |
756 | free_session_slots(ses); | |
757 | kfree(ses); | |
758 | } | |
759 | ||
ac7c46f2 | 760 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
761 | { |
762 | struct nfsd4_session *new; | |
763 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
764 | int numslots, slotsize; | |
c7662518 | 765 | int status; |
5b6feee9 BF |
766 | int idx; |
767 | ||
768 | /* | |
769 | * Note decreasing slot size below client's request may | |
770 | * make it difficult for client to function correctly, whereas | |
771 | * decreasing the number of slots will (just?) affect | |
772 | * performance. When short on memory we therefore prefer to | |
773 | * decrease number of slots instead of their size. | |
774 | */ | |
775 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
776 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
777 | if (numslots < 1) |
778 | return NULL; | |
5b6feee9 BF |
779 | |
780 | new = alloc_session(slotsize, numslots); | |
781 | if (!new) { | |
782 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 783 | return NULL; |
557ce264 | 784 | } |
5b6feee9 | 785 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 786 | |
ec6b5d7b AA |
787 | new->se_client = clp; |
788 | gen_sessionid(new); | |
ec6b5d7b | 789 | |
c7662518 BF |
790 | INIT_LIST_HEAD(&new->se_conns); |
791 | ||
ac7c46f2 | 792 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 793 | new->se_flags = cses->flags; |
8b5ce5cd | 794 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 795 | kref_init(&new->se_ref); |
5b6feee9 | 796 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 797 | spin_lock(&client_lock); |
ec6b5d7b | 798 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 799 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 800 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 801 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 802 | spin_unlock(&client_lock); |
ec6b5d7b | 803 | |
1d1bc8f2 | 804 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 805 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
806 | if (status) { |
807 | free_session(&new->se_ref); | |
ac7c46f2 | 808 | return NULL; |
c7662518 | 809 | } |
dcbeaa68 | 810 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 811 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
812 | /* |
813 | * This is a little silly; with sessions there's no real | |
814 | * use for the callback address. Use the peer address | |
815 | * as a reasonable default for now, but consider fixing | |
816 | * the rpc client not to require an address in the | |
817 | * future: | |
818 | */ | |
edd76786 BF |
819 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
820 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 821 | } |
dcbeaa68 | 822 | nfsd4_probe_callback(clp); |
ac7c46f2 | 823 | return new; |
ec6b5d7b AA |
824 | } |
825 | ||
9089f1b4 | 826 | /* caller must hold client_lock */ |
5282fd72 ME |
827 | static struct nfsd4_session * |
828 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
829 | { | |
830 | struct nfsd4_session *elem; | |
831 | int idx; | |
832 | ||
833 | dump_sessionid(__func__, sessionid); | |
834 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
835 | /* Search in the appropriate list */ |
836 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
837 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
838 | NFS4_MAX_SESSIONID_LEN)) { | |
839 | return elem; | |
840 | } | |
841 | } | |
842 | ||
843 | dprintk("%s: session not found\n", __func__); | |
844 | return NULL; | |
845 | } | |
846 | ||
9089f1b4 | 847 | /* caller must hold client_lock */ |
7116ed6b | 848 | static void |
5282fd72 | 849 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
850 | { |
851 | list_del(&ses->se_hash); | |
4c649378 | 852 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 853 | list_del(&ses->se_perclnt); |
4c649378 | 854 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
855 | } |
856 | ||
36acb66b | 857 | /* must be called under the client_lock */ |
1da177e4 | 858 | static inline void |
36acb66b | 859 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 860 | { |
07cd4909 BH |
861 | if (is_client_expired(clp)) { |
862 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
863 | __func__, | |
864 | clp->cl_clientid.cl_boot, | |
865 | clp->cl_clientid.cl_id); | |
866 | return; | |
867 | } | |
868 | ||
1da177e4 LT |
869 | /* |
870 | * Move client to the end to the LRU list. | |
871 | */ | |
872 | dprintk("renewing client (clientid %08x/%08x)\n", | |
873 | clp->cl_clientid.cl_boot, | |
874 | clp->cl_clientid.cl_id); | |
875 | list_move_tail(&clp->cl_lru, &client_lru); | |
876 | clp->cl_time = get_seconds(); | |
877 | } | |
878 | ||
36acb66b BH |
879 | static inline void |
880 | renew_client(struct nfs4_client *clp) | |
881 | { | |
882 | spin_lock(&client_lock); | |
883 | renew_client_locked(clp); | |
884 | spin_unlock(&client_lock); | |
885 | } | |
886 | ||
1da177e4 LT |
887 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
888 | static int | |
889 | STALE_CLIENTID(clientid_t *clid) | |
890 | { | |
891 | if (clid->cl_boot == boot_time) | |
892 | return 0; | |
60adfc50 AA |
893 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
894 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
895 | return 1; |
896 | } | |
897 | ||
898 | /* | |
899 | * XXX Should we use a slab cache ? | |
900 | * This type of memory management is somewhat inefficient, but we use it | |
901 | * anyway since SETCLIENTID is not a common operation. | |
902 | */ | |
35bba9a3 | 903 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
904 | { |
905 | struct nfs4_client *clp; | |
906 | ||
35bba9a3 BF |
907 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
908 | if (clp == NULL) | |
909 | return NULL; | |
910 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
911 | if (clp->cl_name.data == NULL) { | |
912 | kfree(clp); | |
913 | return NULL; | |
1da177e4 | 914 | } |
35bba9a3 BF |
915 | memcpy(clp->cl_name.data, name.data, name.len); |
916 | clp->cl_name.len = name.len; | |
1da177e4 LT |
917 | return clp; |
918 | } | |
919 | ||
920 | static inline void | |
921 | free_client(struct nfs4_client *clp) | |
922 | { | |
792c95dd BF |
923 | while (!list_empty(&clp->cl_sessions)) { |
924 | struct nfsd4_session *ses; | |
925 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
926 | se_perclnt); | |
927 | list_del(&ses->se_perclnt); | |
928 | nfsd4_put_session(ses); | |
929 | } | |
1da177e4 LT |
930 | if (clp->cl_cred.cr_group_info) |
931 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 932 | kfree(clp->cl_principal); |
1da177e4 LT |
933 | kfree(clp->cl_name.data); |
934 | kfree(clp); | |
935 | } | |
936 | ||
d7682988 BH |
937 | void |
938 | release_session_client(struct nfsd4_session *session) | |
939 | { | |
940 | struct nfs4_client *clp = session->se_client; | |
941 | ||
942 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
943 | return; | |
944 | if (is_client_expired(clp)) { | |
945 | free_client(clp); | |
946 | session->se_client = NULL; | |
947 | } else | |
948 | renew_client_locked(clp); | |
949 | spin_unlock(&client_lock); | |
d7682988 BH |
950 | } |
951 | ||
84d38ac9 BH |
952 | /* must be called under the client_lock */ |
953 | static inline void | |
954 | unhash_client_locked(struct nfs4_client *clp) | |
955 | { | |
792c95dd BF |
956 | struct nfsd4_session *ses; |
957 | ||
07cd4909 | 958 | mark_client_expired(clp); |
84d38ac9 | 959 | list_del(&clp->cl_lru); |
4c649378 | 960 | spin_lock(&clp->cl_lock); |
792c95dd BF |
961 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
962 | list_del_init(&ses->se_hash); | |
4c649378 | 963 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
964 | } |
965 | ||
1da177e4 LT |
966 | static void |
967 | expire_client(struct nfs4_client *clp) | |
968 | { | |
fe0750e5 | 969 | struct nfs4_openowner *oo; |
1da177e4 | 970 | struct nfs4_delegation *dp; |
1da177e4 LT |
971 | struct list_head reaplist; |
972 | ||
1da177e4 LT |
973 | INIT_LIST_HEAD(&reaplist); |
974 | spin_lock(&recall_lock); | |
ea1da636 N |
975 | while (!list_empty(&clp->cl_delegations)) { |
976 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 977 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
978 | list_move(&dp->dl_recall_lru, &reaplist); |
979 | } | |
980 | spin_unlock(&recall_lock); | |
981 | while (!list_empty(&reaplist)) { | |
982 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
983 | list_del_init(&dp->dl_recall_lru); | |
984 | unhash_delegation(dp); | |
985 | } | |
ea1da636 | 986 | while (!list_empty(&clp->cl_openowners)) { |
fe0750e5 BF |
987 | oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); |
988 | release_openowner(oo); | |
1da177e4 | 989 | } |
6ff8da08 | 990 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
991 | if (clp->cl_cb_conn.cb_xprt) |
992 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
993 | list_del(&clp->cl_idhash); |
994 | list_del(&clp->cl_strhash); | |
be1fdf6c | 995 | spin_lock(&client_lock); |
84d38ac9 | 996 | unhash_client_locked(clp); |
46583e25 BH |
997 | if (atomic_read(&clp->cl_refcount) == 0) |
998 | free_client(clp); | |
be1fdf6c | 999 | spin_unlock(&client_lock); |
1da177e4 LT |
1000 | } |
1001 | ||
35bba9a3 BF |
1002 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
1003 | { | |
1004 | memcpy(target->cl_verifier.data, source->data, | |
1005 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
1006 | } |
1007 | ||
35bba9a3 BF |
1008 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
1009 | { | |
1da177e4 LT |
1010 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
1011 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
1012 | } | |
1013 | ||
35bba9a3 BF |
1014 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
1015 | { | |
1da177e4 LT |
1016 | target->cr_uid = source->cr_uid; |
1017 | target->cr_gid = source->cr_gid; | |
1018 | target->cr_group_info = source->cr_group_info; | |
1019 | get_group_info(target->cr_group_info); | |
1020 | } | |
1021 | ||
35bba9a3 | 1022 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1023 | { |
a55370a3 | 1024 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1025 | } |
1026 | ||
1027 | static int | |
599e0a22 BF |
1028 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1029 | { | |
1030 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1031 | } |
1032 | ||
1033 | static int | |
599e0a22 BF |
1034 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1035 | { | |
1036 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1037 | } |
1038 | ||
1039 | /* XXX what about NGROUP */ | |
1040 | static int | |
599e0a22 BF |
1041 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1042 | { | |
1043 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1044 | } |
1045 | ||
5ec7b46c BF |
1046 | static void gen_clid(struct nfs4_client *clp) |
1047 | { | |
1048 | static u32 current_clientid = 1; | |
1049 | ||
1da177e4 LT |
1050 | clp->cl_clientid.cl_boot = boot_time; |
1051 | clp->cl_clientid.cl_id = current_clientid++; | |
1052 | } | |
1053 | ||
deda2faa BF |
1054 | static void gen_confirm(struct nfs4_client *clp) |
1055 | { | |
1056 | static u32 i; | |
1057 | u32 *p; | |
1da177e4 | 1058 | |
1da177e4 | 1059 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1060 | *p++ = get_seconds(); |
1061 | *p++ = i++; | |
1da177e4 LT |
1062 | } |
1063 | ||
b09333c4 RL |
1064 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1065 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1066 | { | |
1067 | struct nfs4_client *clp; | |
1068 | struct sockaddr *sa = svc_addr(rqstp); | |
1069 | char *princ; | |
1070 | ||
1071 | clp = alloc_client(name); | |
1072 | if (clp == NULL) | |
1073 | return NULL; | |
1074 | ||
792c95dd BF |
1075 | INIT_LIST_HEAD(&clp->cl_sessions); |
1076 | ||
b09333c4 RL |
1077 | princ = svc_gss_principal(rqstp); |
1078 | if (princ) { | |
1079 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1080 | if (clp->cl_principal == NULL) { | |
1081 | free_client(clp); | |
1082 | return NULL; | |
1083 | } | |
1084 | } | |
1085 | ||
1086 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 1087 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1088 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1089 | INIT_LIST_HEAD(&clp->cl_idhash); |
1090 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1091 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1092 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1093 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1094 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1095 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1096 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1097 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1098 | clear_bit(0, &clp->cl_cb_slot_busy); |
1099 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1100 | copy_verf(clp, verf); | |
1101 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1102 | clp->cl_flavor = rqstp->rq_flavor; | |
1103 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1104 | gen_confirm(clp); | |
edd76786 | 1105 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1106 | return clp; |
1107 | } | |
1108 | ||
35bba9a3 BF |
1109 | static int check_name(struct xdr_netobj name) |
1110 | { | |
1da177e4 LT |
1111 | if (name.len == 0) |
1112 | return 0; | |
1113 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 1114 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
1115 | return 0; |
1116 | } | |
1117 | return 1; | |
1118 | } | |
1119 | ||
fd39ca9a | 1120 | static void |
1da177e4 LT |
1121 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1122 | { | |
1123 | unsigned int idhashval; | |
1124 | ||
1125 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1126 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1127 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1128 | renew_client(clp); |
1da177e4 LT |
1129 | } |
1130 | ||
fd39ca9a | 1131 | static void |
1da177e4 LT |
1132 | move_to_confirmed(struct nfs4_client *clp) |
1133 | { | |
1134 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1135 | unsigned int strhashval; | |
1136 | ||
1137 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1138 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1139 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1140 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1141 | renew_client(clp); |
1142 | } | |
1143 | ||
1144 | static struct nfs4_client * | |
1145 | find_confirmed_client(clientid_t *clid) | |
1146 | { | |
1147 | struct nfs4_client *clp; | |
1148 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1149 | ||
1150 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1151 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1152 | return clp; |
1153 | } | |
1154 | return NULL; | |
1155 | } | |
1156 | ||
1157 | static struct nfs4_client * | |
1158 | find_unconfirmed_client(clientid_t *clid) | |
1159 | { | |
1160 | struct nfs4_client *clp; | |
1161 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1162 | ||
1163 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1164 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1165 | return clp; |
1166 | } | |
1167 | return NULL; | |
1168 | } | |
1169 | ||
6e5f15c9 | 1170 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1171 | { |
6e5f15c9 | 1172 | return clp->cl_exchange_flags != 0; |
e203d506 | 1173 | } |
a1bcecd2 | 1174 | |
28ce6054 | 1175 | static struct nfs4_client * |
e203d506 | 1176 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1177 | { |
1178 | struct nfs4_client *clp; | |
1179 | ||
1180 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1181 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1182 | return clp; |
1183 | } | |
1184 | return NULL; | |
1185 | } | |
1186 | ||
1187 | static struct nfs4_client * | |
e203d506 | 1188 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1189 | { |
1190 | struct nfs4_client *clp; | |
1191 | ||
1192 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1193 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1194 | return clp; |
1195 | } | |
1196 | return NULL; | |
1197 | } | |
1198 | ||
6f3d772f TU |
1199 | static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) |
1200 | { | |
1201 | switch (family) { | |
1202 | case AF_INET: | |
1203 | ((struct sockaddr_in *)sa)->sin_family = AF_INET; | |
1204 | ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; | |
1205 | return; | |
1206 | case AF_INET6: | |
1207 | ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; | |
1208 | ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; | |
1209 | return; | |
1210 | } | |
1211 | } | |
1212 | ||
fd39ca9a | 1213 | static void |
6f3d772f | 1214 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1215 | { |
07263f1e | 1216 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1217 | struct sockaddr *sa = svc_addr(rqstp); |
1218 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1219 | unsigned short expected_family; |
1220 | ||
1221 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1222 | if (se->se_callback_netid_len == 3 && | |
1223 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1224 | expected_family = AF_INET; | |
1225 | else if (se->se_callback_netid_len == 4 && | |
1226 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1227 | expected_family = AF_INET6; | |
1228 | else | |
1da177e4 LT |
1229 | goto out_err; |
1230 | ||
07263f1e | 1231 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1232 | se->se_callback_addr_len, |
07263f1e BF |
1233 | (struct sockaddr *)&conn->cb_addr, |
1234 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1235 | |
07263f1e | 1236 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1237 | goto out_err; |
aa9a4ec7 | 1238 | |
07263f1e BF |
1239 | if (conn->cb_addr.ss_family == AF_INET6) |
1240 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1241 | |
07263f1e BF |
1242 | conn->cb_prog = se->se_callback_prog; |
1243 | conn->cb_ident = se->se_callback_ident; | |
6f3d772f | 1244 | rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); |
1da177e4 LT |
1245 | return; |
1246 | out_err: | |
07263f1e BF |
1247 | conn->cb_addr.ss_family = AF_UNSPEC; |
1248 | conn->cb_addrlen = 0; | |
849823c5 | 1249 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1250 | "will not receive delegations\n", |
1251 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1252 | ||
1da177e4 LT |
1253 | return; |
1254 | } | |
1255 | ||
074fe897 | 1256 | /* |
557ce264 | 1257 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1258 | */ |
074fe897 AA |
1259 | void |
1260 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1261 | { |
557ce264 AA |
1262 | struct nfsd4_slot *slot = resp->cstate.slot; |
1263 | unsigned int base; | |
074fe897 | 1264 | |
557ce264 | 1265 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1266 | |
557ce264 AA |
1267 | slot->sl_opcnt = resp->opcnt; |
1268 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1269 | |
bf864a31 | 1270 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1271 | slot->sl_datalen = 0; |
bf864a31 | 1272 | return; |
074fe897 | 1273 | } |
557ce264 AA |
1274 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1275 | base = (char *)resp->cstate.datap - | |
1276 | (char *)resp->xbuf->head[0].iov_base; | |
1277 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1278 | slot->sl_datalen)) | |
1279 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1280 | return; | |
074fe897 AA |
1281 | } |
1282 | ||
1283 | /* | |
abfabf8c AA |
1284 | * Encode the replay sequence operation from the slot values. |
1285 | * If cachethis is FALSE encode the uncached rep error on the next | |
1286 | * operation which sets resp->p and increments resp->opcnt for | |
1287 | * nfs4svc_encode_compoundres. | |
074fe897 | 1288 | * |
074fe897 | 1289 | */ |
abfabf8c AA |
1290 | static __be32 |
1291 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1292 | struct nfsd4_compoundres *resp) | |
074fe897 | 1293 | { |
abfabf8c AA |
1294 | struct nfsd4_op *op; |
1295 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1296 | |
abfabf8c | 1297 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1298 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1299 | |
abfabf8c AA |
1300 | /* Encode the replayed sequence operation */ |
1301 | op = &args->ops[resp->opcnt - 1]; | |
1302 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1303 | |
abfabf8c | 1304 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1305 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1306 | op = &args->ops[resp->opcnt++]; |
1307 | op->status = nfserr_retry_uncached_rep; | |
1308 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1309 | } |
abfabf8c | 1310 | return op->status; |
074fe897 AA |
1311 | } |
1312 | ||
1313 | /* | |
557ce264 AA |
1314 | * The sequence operation is not cached because we can use the slot and |
1315 | * session values. | |
074fe897 AA |
1316 | */ |
1317 | __be32 | |
bf864a31 AA |
1318 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1319 | struct nfsd4_sequence *seq) | |
074fe897 | 1320 | { |
557ce264 | 1321 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1322 | __be32 status; |
1323 | ||
557ce264 | 1324 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1325 | |
abfabf8c AA |
1326 | /* Either returns 0 or nfserr_retry_uncached */ |
1327 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1328 | if (status == nfserr_retry_uncached_rep) | |
1329 | return status; | |
074fe897 | 1330 | |
557ce264 AA |
1331 | /* The sequence operation has been encoded, cstate->datap set. */ |
1332 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1333 | |
557ce264 AA |
1334 | resp->opcnt = slot->sl_opcnt; |
1335 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1336 | status = slot->sl_status; | |
074fe897 AA |
1337 | |
1338 | return status; | |
1339 | } | |
1340 | ||
0733d213 AA |
1341 | /* |
1342 | * Set the exchange_id flags returned by the server. | |
1343 | */ | |
1344 | static void | |
1345 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1346 | { | |
1347 | /* pNFS is not supported */ | |
1348 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1349 | ||
1350 | /* Referrals are supported, Migration is not. */ | |
1351 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1352 | ||
1353 | /* set the wire flags to return to client. */ | |
1354 | clid->flags = new->cl_exchange_flags; | |
1355 | } | |
1356 | ||
069b6ad4 AA |
1357 | __be32 |
1358 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1359 | struct nfsd4_compound_state *cstate, | |
1360 | struct nfsd4_exchange_id *exid) | |
1361 | { | |
0733d213 AA |
1362 | struct nfs4_client *unconf, *conf, *new; |
1363 | int status; | |
1364 | unsigned int strhashval; | |
1365 | char dname[HEXDIR_LEN]; | |
363168b4 | 1366 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1367 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1368 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1369 | |
363168b4 | 1370 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1371 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1372 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1373 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1374 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1375 | |
1376 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1377 | return nfserr_inval; | |
1378 | ||
1379 | /* Currently only support SP4_NONE */ | |
1380 | switch (exid->spa_how) { | |
1381 | case SP4_NONE: | |
1382 | break; | |
1383 | case SP4_SSV: | |
044bc1d4 | 1384 | return nfserr_serverfault; |
0733d213 AA |
1385 | default: |
1386 | BUG(); /* checked by xdr code */ | |
1387 | case SP4_MACH_CRED: | |
1388 | return nfserr_serverfault; /* no excuse :-/ */ | |
1389 | } | |
1390 | ||
1391 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1392 | ||
1393 | if (status) | |
1394 | goto error; | |
1395 | ||
1396 | strhashval = clientstr_hashval(dname); | |
1397 | ||
1398 | nfs4_lock_state(); | |
1399 | status = nfs_ok; | |
1400 | ||
e203d506 | 1401 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1402 | if (conf) { |
e203d506 BF |
1403 | if (!clp_used_exchangeid(conf)) { |
1404 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1405 | goto out; | |
1406 | } | |
0733d213 AA |
1407 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1408 | /* 18.35.4 case 8 */ | |
1409 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1410 | status = nfserr_not_same; | |
1411 | goto out; | |
1412 | } | |
1413 | /* Client reboot: destroy old state */ | |
1414 | expire_client(conf); | |
1415 | goto out_new; | |
1416 | } | |
1417 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1418 | /* 18.35.4 case 9 */ | |
1419 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1420 | status = nfserr_perm; | |
1421 | goto out; | |
1422 | } | |
1423 | expire_client(conf); | |
1424 | goto out_new; | |
1425 | } | |
0733d213 AA |
1426 | /* |
1427 | * Set bit when the owner id and verifier map to an already | |
1428 | * confirmed client id (18.35.3). | |
1429 | */ | |
1430 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1431 | ||
1432 | /* | |
1433 | * Falling into 18.35.4 case 2, possible router replay. | |
1434 | * Leave confirmed record intact and return same result. | |
1435 | */ | |
1436 | copy_verf(conf, &verf); | |
1437 | new = conf; | |
1438 | goto out_copy; | |
6ddbbbfe MS |
1439 | } |
1440 | ||
1441 | /* 18.35.4 case 7 */ | |
1442 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1443 | status = nfserr_noent; | |
1444 | goto out; | |
0733d213 AA |
1445 | } |
1446 | ||
e203d506 | 1447 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1448 | if (unconf) { |
1449 | /* | |
1450 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1451 | * a new unconfirmed record should be generated regardless | |
1452 | * of whether any properties have changed. | |
1453 | */ | |
1454 | expire_client(unconf); | |
1455 | } | |
1456 | ||
1457 | out_new: | |
1458 | /* Normal case */ | |
b09333c4 | 1459 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1460 | if (new == NULL) { |
4731030d | 1461 | status = nfserr_jukebox; |
0733d213 AA |
1462 | goto out; |
1463 | } | |
1464 | ||
0733d213 | 1465 | gen_clid(new); |
0733d213 AA |
1466 | add_to_unconfirmed(new, strhashval); |
1467 | out_copy: | |
1468 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1469 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1470 | ||
38eb76a5 | 1471 | exid->seqid = 1; |
0733d213 AA |
1472 | nfsd4_set_ex_flags(new, exid); |
1473 | ||
1474 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1475 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1476 | status = nfs_ok; |
1477 | ||
1478 | out: | |
1479 | nfs4_unlock_state(); | |
1480 | error: | |
1481 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1482 | return status; | |
069b6ad4 AA |
1483 | } |
1484 | ||
b85d4c01 | 1485 | static int |
88e588d5 | 1486 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1487 | { |
88e588d5 AA |
1488 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1489 | slot_seqid); | |
b85d4c01 BH |
1490 | |
1491 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1492 | if (slot_inuse) { |
1493 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1494 | return nfserr_jukebox; |
1495 | else | |
1496 | return nfserr_seq_misordered; | |
1497 | } | |
1498 | /* Normal */ | |
88e588d5 | 1499 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1500 | return nfs_ok; |
1501 | /* Replay */ | |
88e588d5 | 1502 | if (seqid == slot_seqid) |
b85d4c01 BH |
1503 | return nfserr_replay_cache; |
1504 | /* Wraparound */ | |
88e588d5 | 1505 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1506 | return nfs_ok; |
1507 | /* Misordered replay or misordered new request */ | |
1508 | return nfserr_seq_misordered; | |
1509 | } | |
1510 | ||
49557cc7 AA |
1511 | /* |
1512 | * Cache the create session result into the create session single DRC | |
1513 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1514 | * Do this for solo or embedded create session operations. | |
1515 | */ | |
1516 | static void | |
1517 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1518 | struct nfsd4_clid_slot *slot, int nfserr) | |
1519 | { | |
1520 | slot->sl_status = nfserr; | |
1521 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1522 | } | |
1523 | ||
1524 | static __be32 | |
1525 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1526 | struct nfsd4_clid_slot *slot) | |
1527 | { | |
1528 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1529 | return slot->sl_status; | |
1530 | } | |
1531 | ||
1b74c25b MJ |
1532 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1533 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1534 | 1 + /* MIN tag is length with zero, only length */ \ | |
1535 | 3 + /* version, opcount, opcode */ \ | |
1536 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1537 | /* seqid, slotID, slotID, cache */ \ | |
1538 | 4 ) * sizeof(__be32)) | |
1539 | ||
1540 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1541 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1542 | 1 + /* status */ \ | |
1543 | 1 + /* MIN tag is length with zero, only length */ \ | |
1544 | 3 + /* opcount, opcode, opstatus*/ \ | |
1545 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1546 | /* seqid, slotID, slotID, slotID, status */ \ | |
1547 | 5 ) * sizeof(__be32)) | |
1548 | ||
1549 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) | |
1550 | { | |
1551 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1552 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1553 | } | |
1554 | ||
069b6ad4 AA |
1555 | __be32 |
1556 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1557 | struct nfsd4_compound_state *cstate, | |
1558 | struct nfsd4_create_session *cr_ses) | |
1559 | { | |
363168b4 | 1560 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1561 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1562 | struct nfsd4_session *new; |
49557cc7 | 1563 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1564 | bool confirm_me = false; |
ec6b5d7b AA |
1565 | int status = 0; |
1566 | ||
a62573dc MJ |
1567 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1568 | return nfserr_inval; | |
1569 | ||
ec6b5d7b AA |
1570 | nfs4_lock_state(); |
1571 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1572 | conf = find_confirmed_client(&cr_ses->clientid); | |
1573 | ||
1574 | if (conf) { | |
49557cc7 AA |
1575 | cs_slot = &conf->cl_cs_slot; |
1576 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1577 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1578 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1579 | cs_slot->sl_seqid); |
38eb76a5 | 1580 | /* Return the cached reply status */ |
49557cc7 | 1581 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1582 | goto out; |
49557cc7 | 1583 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1584 | status = nfserr_seq_misordered; |
1585 | dprintk("Sequence misordered!\n"); | |
1586 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1587 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1588 | goto out; |
1589 | } | |
ec6b5d7b AA |
1590 | } else if (unconf) { |
1591 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1592 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1593 | status = nfserr_clid_inuse; |
1594 | goto out; | |
1595 | } | |
1596 | ||
49557cc7 AA |
1597 | cs_slot = &unconf->cl_cs_slot; |
1598 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1599 | if (status) { |
1600 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1601 | status = nfserr_seq_misordered; |
cd5b8144 | 1602 | goto out; |
ec6b5d7b AA |
1603 | } |
1604 | ||
86c3e16c | 1605 | confirm_me = true; |
ec6b5d7b AA |
1606 | conf = unconf; |
1607 | } else { | |
1608 | status = nfserr_stale_clientid; | |
1609 | goto out; | |
1610 | } | |
1611 | ||
8323c3b2 BF |
1612 | /* |
1613 | * XXX: we should probably set this at creation time, and check | |
1614 | * for consistent minorversion use throughout: | |
1615 | */ | |
1616 | conf->cl_minorversion = 1; | |
408b79bc BF |
1617 | /* |
1618 | * We do not support RDMA or persistent sessions | |
1619 | */ | |
1620 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1621 | cr_ses->flags &= ~SESSION4_RDMA; | |
1622 | ||
1b74c25b MJ |
1623 | status = nfserr_toosmall; |
1624 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1625 | goto out; | |
1626 | ||
ac7c46f2 BF |
1627 | status = nfserr_jukebox; |
1628 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1629 | if (!new) | |
ec6b5d7b | 1630 | goto out; |
ac7c46f2 BF |
1631 | status = nfs_ok; |
1632 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1633 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1634 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1635 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1636 | cs_slot->sl_seqid++; |
49557cc7 | 1637 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1638 | |
49557cc7 AA |
1639 | /* cache solo and embedded create sessions under the state lock */ |
1640 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1641 | if (confirm_me) |
1642 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1643 | out: |
1644 | nfs4_unlock_state(); | |
1645 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1646 | return status; | |
069b6ad4 AA |
1647 | } |
1648 | ||
57716355 BF |
1649 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1650 | { | |
1651 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1652 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1653 | ||
1654 | return argp->opcnt == resp->opcnt; | |
1655 | } | |
1656 | ||
1d1bc8f2 BF |
1657 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1658 | { | |
1659 | switch (*dir) { | |
1660 | case NFS4_CDFC4_FORE: | |
1661 | case NFS4_CDFC4_BACK: | |
1662 | return nfs_ok; | |
1663 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1664 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1665 | *dir = NFS4_CDFC4_BOTH; | |
1666 | return nfs_ok; | |
1667 | }; | |
1668 | return nfserr_inval; | |
1669 | } | |
1670 | ||
1671 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1672 | struct nfsd4_compound_state *cstate, | |
1673 | struct nfsd4_bind_conn_to_session *bcts) | |
1674 | { | |
1675 | __be32 status; | |
1676 | ||
1677 | if (!nfsd4_last_compound_op(rqstp)) | |
1678 | return nfserr_not_only_op; | |
1679 | spin_lock(&client_lock); | |
1680 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1681 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1682 | * client_lock iself: */ | |
1683 | if (cstate->session) { | |
1684 | nfsd4_get_session(cstate->session); | |
1685 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1686 | } | |
1687 | spin_unlock(&client_lock); | |
1688 | if (!cstate->session) | |
1689 | return nfserr_badsession; | |
1690 | ||
1691 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1692 | if (!status) |
1693 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1694 | return status; | |
1d1bc8f2 BF |
1695 | } |
1696 | ||
5d4cec2f BF |
1697 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1698 | { | |
1699 | if (!session) | |
1700 | return 0; | |
1701 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1702 | } | |
1703 | ||
069b6ad4 AA |
1704 | __be32 |
1705 | nfsd4_destroy_session(struct svc_rqst *r, | |
1706 | struct nfsd4_compound_state *cstate, | |
1707 | struct nfsd4_destroy_session *sessionid) | |
1708 | { | |
e10e0cfc BH |
1709 | struct nfsd4_session *ses; |
1710 | u32 status = nfserr_badsession; | |
1711 | ||
1712 | /* Notes: | |
1713 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1714 | * - Should we return nfserr_back_chan_busy if waiting for | |
1715 | * callbacks on to-be-destroyed session? | |
1716 | * - Do we need to clear any callback info from previous session? | |
1717 | */ | |
1718 | ||
5d4cec2f | 1719 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1720 | if (!nfsd4_last_compound_op(r)) |
1721 | return nfserr_not_only_op; | |
1722 | } | |
e10e0cfc | 1723 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1724 | spin_lock(&client_lock); |
e10e0cfc BH |
1725 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1726 | if (!ses) { | |
9089f1b4 | 1727 | spin_unlock(&client_lock); |
e10e0cfc BH |
1728 | goto out; |
1729 | } | |
1730 | ||
1731 | unhash_session(ses); | |
9089f1b4 | 1732 | spin_unlock(&client_lock); |
e10e0cfc | 1733 | |
ab707e15 | 1734 | nfs4_lock_state(); |
84f5f7cc | 1735 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1736 | nfs4_unlock_state(); |
19cf5c02 BF |
1737 | |
1738 | nfsd4_del_conns(ses); | |
1739 | ||
e10e0cfc BH |
1740 | nfsd4_put_session(ses); |
1741 | status = nfs_ok; | |
1742 | out: | |
1743 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1744 | return status; | |
069b6ad4 AA |
1745 | } |
1746 | ||
a663bdd8 | 1747 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1748 | { |
1749 | struct nfsd4_conn *c; | |
1750 | ||
1751 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1752 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1753 | return c; |
1754 | } | |
1755 | } | |
1756 | return NULL; | |
1757 | } | |
1758 | ||
a663bdd8 | 1759 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1760 | { |
1761 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1762 | struct nfsd4_conn *c; |
21b75b01 | 1763 | int ret; |
328ead28 BF |
1764 | |
1765 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1766 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1767 | if (c) { |
1768 | spin_unlock(&clp->cl_lock); | |
1769 | free_conn(new); | |
1770 | return; | |
1771 | } | |
1772 | __nfsd4_hash_conn(new, ses); | |
1773 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1774 | ret = nfsd4_register_conn(new); |
1775 | if (ret) | |
1776 | /* oops; xprt is already down: */ | |
1777 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1778 | return; |
1779 | } | |
1780 | ||
868b89c3 MJ |
1781 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1782 | { | |
1783 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1784 | ||
1785 | return args->opcnt > session->se_fchannel.maxops; | |
1786 | } | |
1787 | ||
ae82a8d0 MJ |
1788 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1789 | struct nfsd4_session *session) | |
1790 | { | |
1791 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1792 | ||
1793 | return xb->len > session->se_fchannel.maxreq_sz; | |
1794 | } | |
1795 | ||
069b6ad4 | 1796 | __be32 |
b85d4c01 | 1797 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1798 | struct nfsd4_compound_state *cstate, |
1799 | struct nfsd4_sequence *seq) | |
1800 | { | |
f9bb94c4 | 1801 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1802 | struct nfsd4_session *session; |
1803 | struct nfsd4_slot *slot; | |
a663bdd8 | 1804 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1805 | int status; |
1806 | ||
f9bb94c4 AA |
1807 | if (resp->opcnt != 1) |
1808 | return nfserr_sequence_pos; | |
1809 | ||
a663bdd8 BF |
1810 | /* |
1811 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1812 | * below. | |
1813 | */ | |
1814 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1815 | if (!conn) | |
1816 | return nfserr_jukebox; | |
1817 | ||
9089f1b4 | 1818 | spin_lock(&client_lock); |
b85d4c01 BH |
1819 | status = nfserr_badsession; |
1820 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1821 | if (!session) | |
1822 | goto out; | |
1823 | ||
868b89c3 MJ |
1824 | status = nfserr_too_many_ops; |
1825 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1826 | goto out; | |
1827 | ||
ae82a8d0 MJ |
1828 | status = nfserr_req_too_big; |
1829 | if (nfsd4_request_too_big(rqstp, session)) | |
1830 | goto out; | |
1831 | ||
b85d4c01 | 1832 | status = nfserr_badslot; |
6c18ba9f | 1833 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1834 | goto out; |
1835 | ||
557ce264 | 1836 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1837 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1838 | ||
a8dfdaeb AA |
1839 | /* We do not negotiate the number of slots yet, so set the |
1840 | * maxslots to the session maxreqs which is used to encode | |
1841 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1842 | seq->maxslots = session->se_fchannel.maxreqs; | |
1843 | ||
88e588d5 | 1844 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1845 | if (status == nfserr_replay_cache) { |
1846 | cstate->slot = slot; | |
1847 | cstate->session = session; | |
da3846a2 | 1848 | /* Return the cached reply status and set cstate->status |
557ce264 | 1849 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1850 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1851 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1852 | goto out; |
b85d4c01 BH |
1853 | } |
1854 | if (status) | |
1855 | goto out; | |
1856 | ||
a663bdd8 BF |
1857 | nfsd4_sequence_check_conn(conn, session); |
1858 | conn = NULL; | |
328ead28 | 1859 | |
b85d4c01 BH |
1860 | /* Success! bump slot seqid */ |
1861 | slot->sl_inuse = true; | |
1862 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1863 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1864 | |
1865 | cstate->slot = slot; | |
1866 | cstate->session = session; | |
1867 | ||
b85d4c01 | 1868 | out: |
26c0c75e | 1869 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1870 | if (cstate->session) { |
0d7bb719 BF |
1871 | struct nfs4_client *clp = session->se_client; |
1872 | ||
36acb66b | 1873 | nfsd4_get_session(cstate->session); |
0d7bb719 BF |
1874 | atomic_inc(&clp->cl_refcount); |
1875 | if (clp->cl_cb_state == NFSD4_CB_DOWN) | |
1876 | seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; | |
aaf84eb9 | 1877 | } |
a663bdd8 | 1878 | kfree(conn); |
36acb66b | 1879 | spin_unlock(&client_lock); |
b85d4c01 BH |
1880 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1881 | return status; | |
069b6ad4 AA |
1882 | } |
1883 | ||
4dc6ec00 BF |
1884 | __be32 |
1885 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1886 | { | |
bcecf1cc MJ |
1887 | int status = 0; |
1888 | ||
4dc6ec00 BF |
1889 | if (rc->rca_one_fs) { |
1890 | if (!cstate->current_fh.fh_dentry) | |
1891 | return nfserr_nofilehandle; | |
1892 | /* | |
1893 | * We don't take advantage of the rca_one_fs case. | |
1894 | * That's OK, it's optional, we can safely ignore it. | |
1895 | */ | |
1896 | return nfs_ok; | |
1897 | } | |
bcecf1cc | 1898 | |
4dc6ec00 | 1899 | nfs4_lock_state(); |
bcecf1cc MJ |
1900 | status = nfserr_complete_already; |
1901 | if (cstate->session->se_client->cl_firststate) | |
1902 | goto out; | |
1903 | ||
1904 | status = nfserr_stale_clientid; | |
1905 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
1906 | /* |
1907 | * The following error isn't really legal. | |
1908 | * But we only get here if the client just explicitly | |
1909 | * destroyed the client. Surely it no longer cares what | |
1910 | * error it gets back on an operation for the dead | |
1911 | * client. | |
1912 | */ | |
bcecf1cc MJ |
1913 | goto out; |
1914 | ||
1915 | status = nfs_ok; | |
4dc6ec00 | 1916 | nfsd4_create_clid_dir(cstate->session->se_client); |
bcecf1cc | 1917 | out: |
4dc6ec00 | 1918 | nfs4_unlock_state(); |
bcecf1cc | 1919 | return status; |
4dc6ec00 BF |
1920 | } |
1921 | ||
b37ad28b | 1922 | __be32 |
b591480b BF |
1923 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1924 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1925 | { |
1da177e4 LT |
1926 | struct xdr_netobj clname = { |
1927 | .len = setclid->se_namelen, | |
1928 | .data = setclid->se_name, | |
1929 | }; | |
1930 | nfs4_verifier clverifier = setclid->se_verf; | |
1931 | unsigned int strhashval; | |
28ce6054 | 1932 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1933 | __be32 status; |
a55370a3 | 1934 | char dname[HEXDIR_LEN]; |
1da177e4 | 1935 | |
1da177e4 | 1936 | if (!check_name(clname)) |
73aea4ec | 1937 | return nfserr_inval; |
1da177e4 | 1938 | |
a55370a3 N |
1939 | status = nfs4_make_rec_clidname(dname, &clname); |
1940 | if (status) | |
73aea4ec | 1941 | return status; |
a55370a3 | 1942 | |
1da177e4 LT |
1943 | /* |
1944 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1945 | * We get here on a DRC miss. | |
1946 | */ | |
1947 | ||
a55370a3 | 1948 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1949 | |
1da177e4 | 1950 | nfs4_lock_state(); |
e203d506 | 1951 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 1952 | if (conf) { |
a186e767 | 1953 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1954 | status = nfserr_clid_inuse; |
e203d506 BF |
1955 | if (clp_used_exchangeid(conf)) |
1956 | goto out; | |
026722c2 | 1957 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1958 | char addr_str[INET6_ADDRSTRLEN]; |
1959 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1960 | sizeof(addr_str)); | |
1961 | dprintk("NFSD: setclientid: string in use by client " | |
1962 | "at %s\n", addr_str); | |
1da177e4 LT |
1963 | goto out; |
1964 | } | |
1da177e4 | 1965 | } |
a186e767 BF |
1966 | /* |
1967 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1968 | * has a description of SETCLIENTID request processing consisting | |
1969 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1970 | */ | |
e203d506 | 1971 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
3e772463 | 1972 | status = nfserr_jukebox; |
1da177e4 | 1973 | if (!conf) { |
a186e767 BF |
1974 | /* |
1975 | * RFC 3530 14.2.33 CASE 4: | |
1976 | * placed first, because it is the normal case | |
1da177e4 LT |
1977 | */ |
1978 | if (unconf) | |
1979 | expire_client(unconf); | |
b09333c4 | 1980 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1981 | if (new == NULL) |
1da177e4 | 1982 | goto out; |
1da177e4 | 1983 | gen_clid(new); |
599e0a22 | 1984 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1985 | /* |
a186e767 BF |
1986 | * RFC 3530 14.2.33 CASE 1: |
1987 | * probable callback update | |
1da177e4 | 1988 | */ |
31f4a6c1 N |
1989 | if (unconf) { |
1990 | /* Note this is removing unconfirmed {*x***}, | |
1991 | * which is stronger than RFC recommended {vxc**}. | |
1992 | * This has the advantage that there is at most | |
1993 | * one {*x***} in either list at any time. | |
1994 | */ | |
1995 | expire_client(unconf); | |
1da177e4 | 1996 | } |
b09333c4 | 1997 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1998 | if (new == NULL) |
1da177e4 | 1999 | goto out; |
1da177e4 | 2000 | copy_clid(new, conf); |
1da177e4 LT |
2001 | } else if (!unconf) { |
2002 | /* | |
a186e767 BF |
2003 | * RFC 3530 14.2.33 CASE 2: |
2004 | * probable client reboot; state will be removed if | |
2005 | * confirmed. | |
1da177e4 | 2006 | */ |
b09333c4 | 2007 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2008 | if (new == NULL) |
1da177e4 | 2009 | goto out; |
1da177e4 | 2010 | gen_clid(new); |
49ba8781 | 2011 | } else { |
a186e767 BF |
2012 | /* |
2013 | * RFC 3530 14.2.33 CASE 3: | |
2014 | * probable client reboot; state will be removed if | |
2015 | * confirmed. | |
1da177e4 LT |
2016 | */ |
2017 | expire_client(unconf); | |
b09333c4 | 2018 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 2019 | if (new == NULL) |
1da177e4 | 2020 | goto out; |
1da177e4 | 2021 | gen_clid(new); |
1da177e4 | 2022 | } |
8323c3b2 BF |
2023 | /* |
2024 | * XXX: we should probably set this at creation time, and check | |
2025 | * for consistent minorversion use throughout: | |
2026 | */ | |
2027 | new->cl_minorversion = 0; | |
6f3d772f | 2028 | gen_callback(new, setclid, rqstp); |
c175b83c | 2029 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2030 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2031 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2032 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2033 | status = nfs_ok; | |
2034 | out: | |
2035 | nfs4_unlock_state(); | |
2036 | return status; | |
2037 | } | |
2038 | ||
2039 | ||
2040 | /* | |
a186e767 BF |
2041 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2042 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2043 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2044 | */ |
b37ad28b | 2045 | __be32 |
b591480b BF |
2046 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2047 | struct nfsd4_compound_state *cstate, | |
2048 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2049 | { |
363168b4 | 2050 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 2051 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2052 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2053 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2054 | __be32 status; |
1da177e4 LT |
2055 | |
2056 | if (STALE_CLIENTID(clid)) | |
2057 | return nfserr_stale_clientid; | |
2058 | /* | |
2059 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2060 | * We get here on a DRC miss. | |
2061 | */ | |
2062 | ||
2063 | nfs4_lock_state(); | |
21ab45a4 N |
2064 | |
2065 | conf = find_confirmed_client(clid); | |
2066 | unconf = find_unconfirmed_client(clid); | |
2067 | ||
2068 | status = nfserr_clid_inuse; | |
363168b4 | 2069 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 2070 | goto out; |
363168b4 | 2071 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
2072 | goto out; |
2073 | ||
a186e767 BF |
2074 | /* |
2075 | * section 14.2.34 of RFC 3530 has a description of | |
2076 | * SETCLIENTID_CONFIRM request processing consisting | |
2077 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2078 | */ | |
366e0c1d | 2079 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2080 | /* |
2081 | * RFC 3530 14.2.34 CASE 1: | |
2082 | * callback update | |
2083 | */ | |
599e0a22 | 2084 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2085 | status = nfserr_clid_inuse; |
2086 | else { | |
5a3c9d71 BF |
2087 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2088 | nfsd4_probe_callback(conf); | |
1a69c179 | 2089 | expire_client(unconf); |
1da177e4 | 2090 | status = nfs_ok; |
1a69c179 | 2091 | |
1da177e4 | 2092 | } |
f3aba4e5 | 2093 | } else if (conf && !unconf) { |
a186e767 BF |
2094 | /* |
2095 | * RFC 3530 14.2.34 CASE 2: | |
2096 | * probable retransmitted request; play it safe and | |
2097 | * do nothing. | |
7c79f737 | 2098 | */ |
599e0a22 | 2099 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2100 | status = nfserr_clid_inuse; |
21ab45a4 | 2101 | else |
1da177e4 | 2102 | status = nfs_ok; |
7c79f737 | 2103 | } else if (!conf && unconf |
599e0a22 | 2104 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2105 | /* |
2106 | * RFC 3530 14.2.34 CASE 3: | |
2107 | * Normal case; new or rebooted client: | |
7c79f737 | 2108 | */ |
599e0a22 | 2109 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2110 | status = nfserr_clid_inuse; |
2111 | } else { | |
1a69c179 N |
2112 | unsigned int hash = |
2113 | clientstr_hashval(unconf->cl_recdir); | |
2114 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2115 | hash); |
1a69c179 | 2116 | if (conf) { |
c7b9a459 | 2117 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2118 | expire_client(conf); |
2119 | } | |
1da177e4 | 2120 | move_to_confirmed(unconf); |
21ab45a4 | 2121 | conf = unconf; |
5a3c9d71 | 2122 | nfsd4_probe_callback(conf); |
1a69c179 | 2123 | status = nfs_ok; |
1da177e4 | 2124 | } |
599e0a22 BF |
2125 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2126 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2127 | &confirm)))) { |
a186e767 BF |
2128 | /* |
2129 | * RFC 3530 14.2.34 CASE 4: | |
2130 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2131 | */ |
1da177e4 | 2132 | status = nfserr_stale_clientid; |
7c79f737 | 2133 | } else { |
08e8987c N |
2134 | /* check that we have hit one of the cases...*/ |
2135 | status = nfserr_clid_inuse; | |
2136 | } | |
1da177e4 | 2137 | out: |
1da177e4 LT |
2138 | nfs4_unlock_state(); |
2139 | return status; | |
2140 | } | |
2141 | ||
1da177e4 LT |
2142 | /* OPEN Share state helper functions */ |
2143 | static inline struct nfs4_file * | |
2144 | alloc_init_file(struct inode *ino) | |
2145 | { | |
2146 | struct nfs4_file *fp; | |
2147 | unsigned int hashval = file_hashval(ino); | |
2148 | ||
e60d4398 N |
2149 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
2150 | if (fp) { | |
8b671b80 | 2151 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 2152 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
2153 | INIT_LIST_HEAD(&fp->fi_stateids); |
2154 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
2155 | fp->fi_inode = igrab(ino); |
2156 | fp->fi_id = current_fileid++; | |
47f9940c | 2157 | fp->fi_had_conflict = false; |
acfdf5c3 | 2158 | fp->fi_lease = NULL; |
f9d7562f BF |
2159 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2160 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
2161 | spin_lock(&recall_lock); |
2162 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2163 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2164 | return fp; |
2165 | } | |
2166 | return NULL; | |
2167 | } | |
2168 | ||
e60d4398 | 2169 | static void |
e18b890b | 2170 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2171 | { |
e60d4398 N |
2172 | if (*slab == NULL) |
2173 | return; | |
1a1d92c1 | 2174 | kmem_cache_destroy(*slab); |
e60d4398 | 2175 | *slab = NULL; |
1da177e4 LT |
2176 | } |
2177 | ||
e8ff2a84 | 2178 | void |
1da177e4 LT |
2179 | nfsd4_free_slabs(void) |
2180 | { | |
fe0750e5 BF |
2181 | nfsd4_free_slab(&openowner_slab); |
2182 | nfsd4_free_slab(&lockowner_slab); | |
e60d4398 | 2183 | nfsd4_free_slab(&file_slab); |
5ac049ac | 2184 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2185 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2186 | } |
1da177e4 | 2187 | |
e60d4398 N |
2188 | static int |
2189 | nfsd4_init_slabs(void) | |
2190 | { | |
fe0750e5 BF |
2191 | openowner_slab = kmem_cache_create("nfsd4_openowners", |
2192 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2193 | if (openowner_slab == NULL) | |
2194 | goto out_nomem; | |
2195 | lockowner_slab = kmem_cache_create("nfsd4_lockowners", | |
2196 | sizeof(struct nfs4_openowner), 0, 0, NULL); | |
2197 | if (lockowner_slab == NULL) | |
e60d4398 N |
2198 | goto out_nomem; |
2199 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2200 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2201 | if (file_slab == NULL) |
2202 | goto out_nomem; | |
5ac049ac | 2203 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 2204 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
2205 | if (stateid_slab == NULL) |
2206 | goto out_nomem; | |
5b2d21c1 | 2207 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2208 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2209 | if (deleg_slab == NULL) |
2210 | goto out_nomem; | |
e60d4398 N |
2211 | return 0; |
2212 | out_nomem: | |
2213 | nfsd4_free_slabs(); | |
2214 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2215 | return -ENOMEM; | |
1da177e4 LT |
2216 | } |
2217 | ||
fe0750e5 BF |
2218 | void nfs4_free_openowner(struct nfs4_openowner *oo) |
2219 | { | |
2220 | kfree(oo->oo_owner.so_owner.data); | |
2221 | kmem_cache_free(openowner_slab, oo); | |
2222 | } | |
2223 | ||
2224 | void nfs4_free_lockowner(struct nfs4_lockowner *lo) | |
1da177e4 | 2225 | { |
fe0750e5 BF |
2226 | kfree(lo->lo_owner.so_owner.data); |
2227 | kmem_cache_free(lockowner_slab, lo); | |
1da177e4 LT |
2228 | } |
2229 | ||
ff194bd9 | 2230 | static void init_nfs4_replay(struct nfs4_replay *rp) |
1da177e4 | 2231 | { |
ff194bd9 BF |
2232 | rp->rp_status = nfserr_serverfault; |
2233 | rp->rp_buflen = 0; | |
2234 | rp->rp_buf = rp->rp_ibuf; | |
1da177e4 LT |
2235 | } |
2236 | ||
fe0750e5 | 2237 | static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) |
ff194bd9 | 2238 | { |
1da177e4 | 2239 | struct nfs4_stateowner *sop; |
1da177e4 | 2240 | |
fe0750e5 | 2241 | sop = kmem_cache_alloc(slab, GFP_KERNEL); |
ff194bd9 BF |
2242 | if (!sop) |
2243 | return NULL; | |
2244 | ||
2245 | sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); | |
2246 | if (!sop->so_owner.data) { | |
fe0750e5 | 2247 | kmem_cache_free(slab, sop); |
1da177e4 | 2248 | return NULL; |
ff194bd9 BF |
2249 | } |
2250 | sop->so_owner.len = owner->len; | |
2251 | ||
ea1da636 | 2252 | INIT_LIST_HEAD(&sop->so_stateids); |
ff194bd9 | 2253 | sop->so_id = current_ownerid++; |
ff194bd9 BF |
2254 | sop->so_client = clp; |
2255 | init_nfs4_replay(&sop->so_replay); | |
2256 | return sop; | |
2257 | } | |
2258 | ||
fe0750e5 | 2259 | static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) |
ff194bd9 BF |
2260 | { |
2261 | unsigned int idhashval; | |
2262 | ||
fe0750e5 BF |
2263 | idhashval = open_ownerid_hashval(oo->oo_owner.so_id); |
2264 | list_add(&oo->oo_owner.so_idhash, &open_ownerid_hashtbl[idhashval]); | |
2265 | list_add(&oo->oo_owner.so_strhash, &open_ownerstr_hashtbl[strhashval]); | |
2266 | list_add(&oo->oo_perclient, &clp->cl_openowners); | |
ff194bd9 BF |
2267 | } |
2268 | ||
fe0750e5 | 2269 | static struct nfs4_openowner * |
ff194bd9 | 2270 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
fe0750e5 | 2271 | struct nfs4_openowner *oo; |
ff194bd9 | 2272 | |
fe0750e5 BF |
2273 | oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); |
2274 | if (!oo) | |
ff194bd9 | 2275 | return NULL; |
fe0750e5 BF |
2276 | oo->oo_owner.so_is_open_owner = 1; |
2277 | oo->oo_owner.so_seqid = open->op_seqid; | |
2278 | oo->oo_confirmed = 0; | |
2279 | oo->oo_time = 0; | |
2280 | INIT_LIST_HEAD(&oo->oo_close_lru); | |
2281 | hash_openowner(oo, clp, strhashval); | |
2282 | return oo; | |
1da177e4 LT |
2283 | } |
2284 | ||
1da177e4 LT |
2285 | static inline void |
2286 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
fe0750e5 BF |
2287 | struct nfs4_openowner *oo = open->op_openowner; |
2288 | unsigned int hashval = stateid_hashval(oo->oo_owner.so_id, fp->fi_id); | |
1da177e4 LT |
2289 | |
2290 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
2291 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2292 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
2293 | INIT_LIST_HEAD(&stp->st_perfile); |
2294 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
fe0750e5 | 2295 | list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); |
8beefa24 | 2296 | list_add(&stp->st_perfile, &fp->fi_stateids); |
5fa0bbb4 | 2297 | stp->st_type = NFS4_OPEN_STID; |
fe0750e5 | 2298 | stp->st_stateowner = &oo->oo_owner; |
13cd2184 | 2299 | get_nfs4_file(fp); |
1da177e4 | 2300 | stp->st_file = fp; |
e4e83ea4 | 2301 | stp->st_stateid.si_boot = boot_time; |
fe0750e5 | 2302 | stp->st_stateid.si_stateownerid = oo->oo_owner.so_id; |
1da177e4 | 2303 | stp->st_stateid.si_fileid = fp->fi_id; |
73997dc4 | 2304 | /* note will be incremented before first return to client: */ |
1da177e4 LT |
2305 | stp->st_stateid.si_generation = 0; |
2306 | stp->st_access_bmap = 0; | |
2307 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2308 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2309 | &stp->st_access_bmap); | |
1da177e4 | 2310 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2311 | stp->st_openstp = NULL; |
1da177e4 LT |
2312 | } |
2313 | ||
fd39ca9a | 2314 | static void |
fe0750e5 | 2315 | move_to_close_lru(struct nfs4_openowner *oo) |
1da177e4 | 2316 | { |
fe0750e5 | 2317 | dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); |
1da177e4 | 2318 | |
fe0750e5 BF |
2319 | list_move_tail(&oo->oo_close_lru, &close_lru); |
2320 | oo->oo_time = get_seconds(); | |
1da177e4 LT |
2321 | } |
2322 | ||
1da177e4 | 2323 | static int |
599e0a22 BF |
2324 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2325 | clientid_t *clid) | |
2326 | { | |
2327 | return (sop->so_owner.len == owner->len) && | |
2328 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2329 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2330 | } |
2331 | ||
fe0750e5 | 2332 | static struct nfs4_openowner * |
1da177e4 LT |
2333 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
2334 | { | |
2335 | struct nfs4_stateowner *so = NULL; | |
2336 | ||
506f275f | 2337 | list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) { |
599e0a22 | 2338 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
fe0750e5 | 2339 | return container_of(so, struct nfs4_openowner, oo_owner); |
1da177e4 LT |
2340 | } |
2341 | return NULL; | |
2342 | } | |
2343 | ||
2344 | /* search file_hashtbl[] for file */ | |
2345 | static struct nfs4_file * | |
2346 | find_file(struct inode *ino) | |
2347 | { | |
2348 | unsigned int hashval = file_hashval(ino); | |
2349 | struct nfs4_file *fp; | |
2350 | ||
8b671b80 | 2351 | spin_lock(&recall_lock); |
1da177e4 | 2352 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2353 | if (fp->fi_inode == ino) { |
2354 | get_nfs4_file(fp); | |
8b671b80 | 2355 | spin_unlock(&recall_lock); |
1da177e4 | 2356 | return fp; |
13cd2184 | 2357 | } |
1da177e4 | 2358 | } |
8b671b80 | 2359 | spin_unlock(&recall_lock); |
1da177e4 LT |
2360 | return NULL; |
2361 | } | |
2362 | ||
d87a8ade | 2363 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2364 | { |
d87a8ade | 2365 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2366 | return 0; |
d87a8ade AA |
2367 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2368 | return 0; | |
2369 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2370 | if (minorversion && x) { | |
2371 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2372 | return 0; | |
2373 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2374 | return 0; | |
2375 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2376 | } | |
2377 | if (x) | |
8838dc43 BF |
2378 | return 0; |
2379 | return 1; | |
ba5a6a19 BF |
2380 | } |
2381 | ||
8838dc43 | 2382 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2383 | { |
8838dc43 BF |
2384 | /* Note: unlike access bits, deny bits may be zero. */ |
2385 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2386 | } |
1da177e4 | 2387 | |
1da177e4 LT |
2388 | /* |
2389 | * Called to check deny when READ with all zero stateid or | |
2390 | * WRITE with all zero or all one stateid | |
2391 | */ | |
b37ad28b | 2392 | static __be32 |
1da177e4 LT |
2393 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2394 | { | |
2395 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2396 | struct nfs4_file *fp; | |
2397 | struct nfs4_stateid *stp; | |
b37ad28b | 2398 | __be32 ret; |
1da177e4 LT |
2399 | |
2400 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2401 | ||
2402 | fp = find_file(ino); | |
13cd2184 N |
2403 | if (!fp) |
2404 | return nfs_ok; | |
b700949b | 2405 | ret = nfserr_locked; |
1da177e4 | 2406 | /* Search for conflicting share reservations */ |
13cd2184 N |
2407 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2408 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2409 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2410 | goto out; | |
1da177e4 | 2411 | } |
13cd2184 N |
2412 | ret = nfs_ok; |
2413 | out: | |
2414 | put_nfs4_file(fp); | |
2415 | return ret; | |
1da177e4 LT |
2416 | } |
2417 | ||
6b57d9c8 | 2418 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2419 | { |
1da177e4 LT |
2420 | /* We're assuming the state code never drops its reference |
2421 | * without first removing the lease. Since we're in this lease | |
2422 | * callback (and since the lease code is serialized by the kernel | |
2423 | * lock) we know the server hasn't removed the lease yet, we know | |
2424 | * it's safe to take a reference: */ | |
2425 | atomic_inc(&dp->dl_count); | |
2426 | ||
1da177e4 | 2427 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2428 | |
460781b5 | 2429 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2430 | dp->dl_time = get_seconds(); |
2431 | ||
6b57d9c8 BF |
2432 | nfsd4_cb_recall(dp); |
2433 | } | |
2434 | ||
acfdf5c3 | 2435 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2436 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2437 | { | |
acfdf5c3 BF |
2438 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2439 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2440 | |
acfdf5c3 BF |
2441 | BUG_ON(!fp); |
2442 | /* We assume break_lease is only called once per lease: */ | |
2443 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2444 | /* |
2445 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2446 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2447 | * in time: |
0272e1fd BF |
2448 | */ |
2449 | fl->fl_break_time = 0; | |
1da177e4 | 2450 | |
5d926e8c | 2451 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2452 | fp->fi_had_conflict = true; |
2453 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2454 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2455 | spin_unlock(&recall_lock); |
1da177e4 LT |
2456 | } |
2457 | ||
1da177e4 LT |
2458 | static |
2459 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2460 | { | |
2461 | if (arg & F_UNLCK) | |
2462 | return lease_modify(onlist, arg); | |
2463 | else | |
2464 | return -EAGAIN; | |
2465 | } | |
2466 | ||
7b021967 | 2467 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2468 | .lm_break = nfsd_break_deleg_cb, |
2469 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2470 | }; |
2471 | ||
7a8711c9 BF |
2472 | static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) |
2473 | { | |
2474 | if (nfsd4_has_session(cstate)) | |
2475 | return nfs_ok; | |
2476 | if (seqid == so->so_seqid - 1) | |
2477 | return nfserr_replay_me; | |
2478 | if (seqid == so->so_seqid) | |
2479 | return nfs_ok; | |
2480 | return nfserr_bad_seqid; | |
2481 | } | |
1da177e4 | 2482 | |
b37ad28b | 2483 | __be32 |
6668958f AA |
2484 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2485 | struct nfsd4_open *open) | |
1da177e4 | 2486 | { |
1da177e4 LT |
2487 | clientid_t *clientid = &open->op_clientid; |
2488 | struct nfs4_client *clp = NULL; | |
2489 | unsigned int strhashval; | |
fe0750e5 | 2490 | struct nfs4_openowner *oo = NULL; |
7a8711c9 | 2491 | __be32 status; |
1da177e4 | 2492 | |
1da177e4 | 2493 | if (!check_name(open->op_owner)) |
0f442aa2 | 2494 | return nfserr_inval; |
1da177e4 LT |
2495 | |
2496 | if (STALE_CLIENTID(&open->op_clientid)) | |
2497 | return nfserr_stale_clientid; | |
2498 | ||
506f275f | 2499 | strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner); |
fe0750e5 BF |
2500 | oo = find_openstateowner_str(strhashval, open); |
2501 | open->op_openowner = oo; | |
2502 | if (!oo) { | |
0f442aa2 | 2503 | /* Make sure the client's lease hasn't expired. */ |
1da177e4 LT |
2504 | clp = find_confirmed_client(clientid); |
2505 | if (clp == NULL) | |
0f442aa2 BF |
2506 | return nfserr_expired; |
2507 | goto renew; | |
1da177e4 | 2508 | } |
fe0750e5 | 2509 | if (!oo->oo_confirmed) { |
0f442aa2 | 2510 | /* Replace unconfirmed owners without checking for replay. */ |
fe0750e5 BF |
2511 | clp = oo->oo_owner.so_client; |
2512 | release_openowner(oo); | |
2513 | open->op_openowner = NULL; | |
0f442aa2 BF |
2514 | goto renew; |
2515 | } | |
fe0750e5 | 2516 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); |
7a8711c9 BF |
2517 | if (status) |
2518 | return status; | |
1da177e4 | 2519 | renew: |
fe0750e5 BF |
2520 | if (open->op_openowner == NULL) { |
2521 | oo = alloc_init_open_stateowner(strhashval, clp, open); | |
2522 | if (oo == NULL) | |
3e772463 | 2523 | return nfserr_jukebox; |
fe0750e5 | 2524 | open->op_openowner = oo; |
0f442aa2 | 2525 | } |
fe0750e5 BF |
2526 | list_del_init(&oo->oo_close_lru); |
2527 | renew_client(oo->oo_owner.so_client); | |
0f442aa2 | 2528 | return nfs_ok; |
1da177e4 LT |
2529 | } |
2530 | ||
b37ad28b | 2531 | static inline __be32 |
4a6e43e6 N |
2532 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2533 | { | |
2534 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2535 | return nfserr_openmode; | |
2536 | else | |
2537 | return nfs_ok; | |
2538 | } | |
2539 | ||
52f4fb43 N |
2540 | static struct nfs4_delegation * |
2541 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2542 | { | |
32b007b4 | 2543 | struct nfs4_delegation *dp; |
52f4fb43 | 2544 | |
acfdf5c3 | 2545 | spin_lock(&recall_lock); |
32b007b4 BF |
2546 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) |
2547 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) { | |
2548 | spin_unlock(&recall_lock); | |
2549 | return dp; | |
2550 | } | |
acfdf5c3 | 2551 | spin_unlock(&recall_lock); |
32b007b4 | 2552 | return NULL; |
52f4fb43 N |
2553 | } |
2554 | ||
c47d832b | 2555 | static int share_access_to_flags(u32 share_access) |
24a0111e BF |
2556 | { |
2557 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2558 | ||
2559 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2560 | } | |
2561 | ||
b37ad28b | 2562 | static __be32 |
567d9829 N |
2563 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2564 | struct nfs4_delegation **dp) | |
2565 | { | |
2566 | int flags; | |
b37ad28b | 2567 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2568 | |
2569 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2570 | if (*dp == NULL) | |
c44c5eeb | 2571 | goto out; |
24a0111e | 2572 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2573 | status = nfs4_check_delegmode(*dp, flags); |
2574 | if (status) | |
2575 | *dp = NULL; | |
c44c5eeb N |
2576 | out: |
2577 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2578 | return nfs_ok; | |
2579 | if (status) | |
2580 | return status; | |
fe0750e5 | 2581 | open->op_openowner->oo_confirmed = 1; |
c44c5eeb | 2582 | return nfs_ok; |
567d9829 N |
2583 | } |
2584 | ||
b37ad28b | 2585 | static __be32 |
1da177e4 LT |
2586 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2587 | { | |
2588 | struct nfs4_stateid *local; | |
fe0750e5 | 2589 | struct nfs4_openowner *oo = open->op_openowner; |
1da177e4 | 2590 | |
8beefa24 | 2591 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2592 | /* ignore lock owners */ |
2593 | if (local->st_stateowner->so_is_open_owner == 0) | |
2594 | continue; | |
2595 | /* remember if we have seen this open owner */ | |
fe0750e5 | 2596 | if (local->st_stateowner == &oo->oo_owner) |
1da177e4 LT |
2597 | *stpp = local; |
2598 | /* check for conflicting share reservations */ | |
2599 | if (!test_share(local, open)) | |
77eaae8d | 2600 | return nfserr_share_denied; |
1da177e4 | 2601 | } |
77eaae8d | 2602 | return nfs_ok; |
1da177e4 LT |
2603 | } |
2604 | ||
5ac049ac N |
2605 | static inline struct nfs4_stateid * |
2606 | nfs4_alloc_stateid(void) | |
2607 | { | |
2608 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2609 | } | |
2610 | ||
21fb4016 BF |
2611 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2612 | { | |
2613 | int flags = 0; | |
2614 | ||
2615 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2616 | flags |= NFSD_MAY_READ; | |
2617 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2618 | flags |= NFSD_MAY_WRITE; | |
2619 | return flags; | |
2620 | } | |
2621 | ||
0c12eaff CB |
2622 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2623 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2624 | { |
2625 | __be32 status; | |
0c12eaff CB |
2626 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2627 | int access = nfs4_access_to_access(open->op_share_access); | |
2628 | ||
2629 | /* CLAIM_DELEGATE_CUR is used in response to a broken lease; | |
2630 | * allowing it to break the lease and return EAGAIN leaves the | |
2631 | * client unable to make progress in returning the delegation */ | |
2632 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2633 | access |= NFSD_MAY_NOT_BREAK_LEASE; | |
f9d7562f BF |
2634 | |
2635 | if (!fp->fi_fds[oflag]) { | |
2636 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2637 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2638 | if (status) |
2639 | return status; | |
2640 | } | |
2641 | nfs4_file_get_access(fp, oflag); | |
2642 | ||
2643 | return nfs_ok; | |
2644 | } | |
2645 | ||
b37ad28b | 2646 | static __be32 |
1da177e4 | 2647 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
f9d7562f BF |
2648 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2649 | struct nfsd4_open *open) | |
1da177e4 LT |
2650 | { |
2651 | struct nfs4_stateid *stp; | |
f9d7562f | 2652 | __be32 status; |
1da177e4 | 2653 | |
5ac049ac | 2654 | stp = nfs4_alloc_stateid(); |
1da177e4 | 2655 | if (stp == NULL) |
3e772463 | 2656 | return nfserr_jukebox; |
1da177e4 | 2657 | |
0c12eaff | 2658 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2659 | if (status) { |
2660 | kmem_cache_free(stateid_slab, stp); | |
2661 | return status; | |
1da177e4 | 2662 | } |
1da177e4 LT |
2663 | *stpp = stp; |
2664 | return 0; | |
2665 | } | |
2666 | ||
b37ad28b | 2667 | static inline __be32 |
1da177e4 LT |
2668 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2669 | struct nfsd4_open *open) | |
2670 | { | |
2671 | struct iattr iattr = { | |
2672 | .ia_valid = ATTR_SIZE, | |
2673 | .ia_size = 0, | |
2674 | }; | |
2675 | if (!open->op_truncate) | |
2676 | return 0; | |
2677 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2678 | return nfserr_inval; |
1da177e4 LT |
2679 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2680 | } | |
2681 | ||
b37ad28b | 2682 | static __be32 |
f9d7562f | 2683 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
1da177e4 | 2684 | { |
7d947842 BF |
2685 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2686 | bool new_access; | |
b37ad28b | 2687 | __be32 status; |
1da177e4 | 2688 | |
7d947842 | 2689 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2690 | if (new_access) { |
0c12eaff | 2691 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2692 | if (status) |
2693 | return status; | |
6c26d08f | 2694 | } |
1da177e4 LT |
2695 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2696 | if (status) { | |
f9d7562f | 2697 | if (new_access) { |
f197c271 | 2698 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2699 | nfs4_file_put_access(fp, oflag); |
2700 | } | |
1da177e4 LT |
2701 | return status; |
2702 | } | |
2703 | /* remember the open */ | |
24a0111e | 2704 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2705 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2706 | |
2707 | return nfs_ok; | |
2708 | } | |
2709 | ||
2710 | ||
1da177e4 | 2711 | static void |
37515177 | 2712 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2713 | { |
fe0750e5 BF |
2714 | open->op_openowner->oo_confirmed = 1; |
2715 | open->op_openowner->oo_owner.so_client->cl_firststate = 1; | |
1da177e4 LT |
2716 | } |
2717 | ||
14a24e99 BF |
2718 | /* Should we give out recallable state?: */ |
2719 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2720 | { | |
2721 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2722 | return true; | |
2723 | /* | |
2724 | * In the sessions case, since we don't have to establish a | |
2725 | * separate connection for callbacks, we assume it's OK | |
2726 | * until we hear otherwise: | |
2727 | */ | |
2728 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2729 | } | |
2730 | ||
22d38c4c BF |
2731 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2732 | { | |
2733 | struct file_lock *fl; | |
2734 | ||
2735 | fl = locks_alloc_lock(); | |
2736 | if (!fl) | |
2737 | return NULL; | |
2738 | locks_init_lock(fl); | |
2739 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2740 | fl->fl_flags = FL_LEASE; | |
2741 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2742 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2743 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2744 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2745 | return fl; |
2746 | } | |
2747 | ||
edab9782 BF |
2748 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2749 | { | |
acfdf5c3 | 2750 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2751 | struct file_lock *fl; |
2752 | int status; | |
2753 | ||
2754 | fl = nfs4_alloc_init_lease(dp, flag); | |
2755 | if (!fl) | |
2756 | return -ENOMEM; | |
acfdf5c3 BF |
2757 | fl->fl_file = find_readable_file(fp); |
2758 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
2759 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); | |
edab9782 | 2760 | if (status) { |
acfdf5c3 | 2761 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2762 | locks_free_lock(fl); |
2763 | return -ENOMEM; | |
2764 | } | |
acfdf5c3 BF |
2765 | fp->fi_lease = fl; |
2766 | fp->fi_deleg_file = fl->fl_file; | |
2767 | get_file(fp->fi_deleg_file); | |
2768 | atomic_set(&fp->fi_delegees, 1); | |
2769 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2770 | return 0; | |
2771 | } | |
2772 | ||
2773 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2774 | { | |
2775 | struct nfs4_file *fp = dp->dl_file; | |
2776 | ||
2777 | if (!fp->fi_lease) | |
2778 | return nfs4_setlease(dp, flag); | |
2779 | spin_lock(&recall_lock); | |
2780 | if (fp->fi_had_conflict) { | |
2781 | spin_unlock(&recall_lock); | |
2782 | return -EAGAIN; | |
2783 | } | |
2784 | atomic_inc(&fp->fi_delegees); | |
2785 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2786 | spin_unlock(&recall_lock); | |
2787 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
edab9782 BF |
2788 | return 0; |
2789 | } | |
2790 | ||
1da177e4 LT |
2791 | /* |
2792 | * Attempt to hand out a delegation. | |
2793 | */ | |
2794 | static void | |
2795 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2796 | { | |
2797 | struct nfs4_delegation *dp; | |
fe0750e5 | 2798 | struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); |
14a24e99 | 2799 | int cb_up; |
1da177e4 LT |
2800 | int status, flag = 0; |
2801 | ||
fe0750e5 | 2802 | cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); |
1da177e4 | 2803 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2804 | open->op_recall = 0; |
2805 | switch (open->op_claim_type) { | |
2806 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2807 | if (!cb_up) |
7b190fec N |
2808 | open->op_recall = 1; |
2809 | flag = open->op_delegate_type; | |
2810 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2811 | goto out; | |
2812 | break; | |
2813 | case NFS4_OPEN_CLAIM_NULL: | |
2814 | /* Let's not give out any delegations till everyone's | |
2815 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2816 | if (locks_in_grace()) |
7b190fec | 2817 | goto out; |
fe0750e5 | 2818 | if (!cb_up || !oo->oo_confirmed) |
7b190fec N |
2819 | goto out; |
2820 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2821 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2822 | else | |
2823 | flag = NFS4_OPEN_DELEGATE_READ; | |
2824 | break; | |
2825 | default: | |
2826 | goto out; | |
2827 | } | |
1da177e4 | 2828 | |
fe0750e5 | 2829 | dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); |
dd239cc0 BF |
2830 | if (dp == NULL) |
2831 | goto out_no_deleg; | |
acfdf5c3 | 2832 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2833 | if (status) |
dd239cc0 | 2834 | goto out_free; |
1da177e4 LT |
2835 | |
2836 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2837 | ||
8c10cbdb BH |
2838 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2839 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2840 | out: |
7b190fec N |
2841 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2842 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2843 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2844 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2845 | open->op_delegate_type = flag; |
dd239cc0 BF |
2846 | return; |
2847 | out_free: | |
acfdf5c3 | 2848 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2849 | out_no_deleg: |
2850 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2851 | goto out; | |
1da177e4 LT |
2852 | } |
2853 | ||
2854 | /* | |
2855 | * called with nfs4_lock_state() held. | |
2856 | */ | |
b37ad28b | 2857 | __be32 |
1da177e4 LT |
2858 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2859 | { | |
6668958f | 2860 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2861 | struct nfs4_file *fp = NULL; |
2862 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2863 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2864 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2865 | __be32 status; |
1da177e4 LT |
2866 | |
2867 | status = nfserr_inval; | |
d87a8ade | 2868 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2869 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2870 | goto out; |
2871 | /* | |
2872 | * Lookup file; if found, lookup stateid and check open request, | |
2873 | * and check for delegations in the process of being recalled. | |
2874 | * If not found, create the nfs4_file struct | |
2875 | */ | |
2876 | fp = find_file(ino); | |
2877 | if (fp) { | |
2878 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2879 | goto out; | |
c44c5eeb N |
2880 | status = nfs4_check_deleg(fp, open, &dp); |
2881 | if (status) | |
2882 | goto out; | |
1da177e4 | 2883 | } else { |
c44c5eeb N |
2884 | status = nfserr_bad_stateid; |
2885 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2886 | goto out; | |
3e772463 | 2887 | status = nfserr_jukebox; |
1da177e4 LT |
2888 | fp = alloc_init_file(ino); |
2889 | if (fp == NULL) | |
2890 | goto out; | |
2891 | } | |
2892 | ||
2893 | /* | |
2894 | * OPEN the file, or upgrade an existing OPEN. | |
2895 | * If truncate fails, the OPEN fails. | |
2896 | */ | |
2897 | if (stp) { | |
2898 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2899 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2900 | if (status) |
2901 | goto out; | |
2902 | } else { | |
f9d7562f | 2903 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2904 | if (status) |
1da177e4 LT |
2905 | goto out; |
2906 | init_stateid(stp, fp, open); | |
2907 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2908 | if (status) { | |
2283963f | 2909 | release_open_stateid(stp); |
1da177e4 LT |
2910 | goto out; |
2911 | } | |
2912 | } | |
73997dc4 | 2913 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
2914 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); |
2915 | ||
4dc6ec00 | 2916 | if (nfsd4_has_session(&resp->cstate)) |
fe0750e5 | 2917 | open->op_openowner->oo_confirmed = 1; |
6668958f | 2918 | |
1da177e4 LT |
2919 | /* |
2920 | * Attempt to hand out a delegation. No error return, because the | |
2921 | * OPEN succeeds even if we fail. | |
2922 | */ | |
2923 | nfs4_open_delegation(current_fh, open, stp); | |
2924 | ||
2925 | status = nfs_ok; | |
2926 | ||
8c10cbdb BH |
2927 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2928 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2929 | out: |
13cd2184 N |
2930 | if (fp) |
2931 | put_nfs4_file(fp); | |
37515177 N |
2932 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2933 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2934 | /* |
2935 | * To finish the open response, we just need to set the rflags. | |
2936 | */ | |
2937 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
fe0750e5 | 2938 | if (!open->op_openowner->oo_confirmed && |
6668958f | 2939 | !nfsd4_has_session(&resp->cstate)) |
1da177e4 LT |
2940 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2941 | ||
2942 | return status; | |
2943 | } | |
2944 | ||
b37ad28b | 2945 | __be32 |
b591480b BF |
2946 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2947 | clientid_t *clid) | |
1da177e4 LT |
2948 | { |
2949 | struct nfs4_client *clp; | |
b37ad28b | 2950 | __be32 status; |
1da177e4 LT |
2951 | |
2952 | nfs4_lock_state(); | |
2953 | dprintk("process_renew(%08x/%08x): starting\n", | |
2954 | clid->cl_boot, clid->cl_id); | |
2955 | status = nfserr_stale_clientid; | |
2956 | if (STALE_CLIENTID(clid)) | |
2957 | goto out; | |
2958 | clp = find_confirmed_client(clid); | |
2959 | status = nfserr_expired; | |
2960 | if (clp == NULL) { | |
2961 | /* We assume the client took too long to RENEW. */ | |
2962 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2963 | goto out; | |
2964 | } | |
2965 | renew_client(clp); | |
2966 | status = nfserr_cb_path_down; | |
ea1da636 | 2967 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 2968 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
2969 | goto out; |
2970 | status = nfs_ok; | |
2971 | out: | |
2972 | nfs4_unlock_state(); | |
2973 | return status; | |
2974 | } | |
2975 | ||
c47d832b | 2976 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
2977 | }; |
2978 | ||
a76b4319 | 2979 | static void |
af558e33 | 2980 | nfsd4_end_grace(void) |
a76b4319 N |
2981 | { |
2982 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2983 | nfsd4_recdir_purge_old(); |
af558e33 | 2984 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2985 | /* |
2986 | * Now that every NFSv4 client has had the chance to recover and | |
2987 | * to see the (possibly new, possibly shorter) lease time, we | |
2988 | * can safely set the next grace time to the current lease time: | |
2989 | */ | |
2990 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2991 | } |
2992 | ||
fd39ca9a | 2993 | static time_t |
1da177e4 LT |
2994 | nfs4_laundromat(void) |
2995 | { | |
2996 | struct nfs4_client *clp; | |
fe0750e5 | 2997 | struct nfs4_openowner *oo; |
1da177e4 LT |
2998 | struct nfs4_delegation *dp; |
2999 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
3000 | time_t cutoff = get_seconds() - nfsd4_lease; |
3001 | time_t t, clientid_val = nfsd4_lease; | |
3002 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
3003 | |
3004 | nfs4_lock_state(); | |
3005 | ||
3006 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
3007 | if (locks_in_grace()) |
3008 | nfsd4_end_grace(); | |
36acb66b BH |
3009 | INIT_LIST_HEAD(&reaplist); |
3010 | spin_lock(&client_lock); | |
1da177e4 LT |
3011 | list_for_each_safe(pos, next, &client_lru) { |
3012 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
3013 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
3014 | t = clp->cl_time - cutoff; | |
3015 | if (clientid_val > t) | |
3016 | clientid_val = t; | |
3017 | break; | |
3018 | } | |
d7682988 BH |
3019 | if (atomic_read(&clp->cl_refcount)) { |
3020 | dprintk("NFSD: client in use (clientid %08x)\n", | |
3021 | clp->cl_clientid.cl_id); | |
3022 | continue; | |
3023 | } | |
3024 | unhash_client_locked(clp); | |
3025 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
3026 | } |
3027 | spin_unlock(&client_lock); | |
3028 | list_for_each_safe(pos, next, &reaplist) { | |
3029 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
3030 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
3031 | clp->cl_clientid.cl_id); | |
c7b9a459 | 3032 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
3033 | expire_client(clp); |
3034 | } | |
1da177e4 LT |
3035 | spin_lock(&recall_lock); |
3036 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3037 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3038 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3039 | u = dp->dl_time - cutoff; | |
3040 | if (test_val > u) | |
3041 | test_val = u; | |
3042 | break; | |
3043 | } | |
1da177e4 LT |
3044 | list_move(&dp->dl_recall_lru, &reaplist); |
3045 | } | |
3046 | spin_unlock(&recall_lock); | |
3047 | list_for_each_safe(pos, next, &reaplist) { | |
3048 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3049 | list_del_init(&dp->dl_recall_lru); | |
3050 | unhash_delegation(dp); | |
3051 | } | |
cf07d2ea | 3052 | test_val = nfsd4_lease; |
1da177e4 | 3053 | list_for_each_safe(pos, next, &close_lru) { |
fe0750e5 BF |
3054 | oo = container_of(pos, struct nfs4_openowner, oo_close_lru); |
3055 | if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { | |
3056 | u = oo->oo_time - cutoff; | |
1da177e4 LT |
3057 | if (test_val > u) |
3058 | test_val = u; | |
3059 | break; | |
3060 | } | |
3061 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
fe0750e5 BF |
3062 | oo->oo_owner.so_id); |
3063 | release_openowner(oo); | |
1da177e4 LT |
3064 | } |
3065 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3066 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3067 | nfs4_unlock_state(); | |
3068 | return clientid_val; | |
3069 | } | |
3070 | ||
a254b246 HH |
3071 | static struct workqueue_struct *laundry_wq; |
3072 | static void laundromat_main(struct work_struct *); | |
3073 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3074 | ||
3075 | static void | |
c4028958 | 3076 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3077 | { |
3078 | time_t t; | |
3079 | ||
3080 | t = nfs4_laundromat(); | |
3081 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3082 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3083 | } |
3084 | ||
fe0750e5 | 3085 | static struct nfs4_openowner * search_close_lru(u32 st_id) |
f8816512 | 3086 | { |
fe0750e5 | 3087 | struct nfs4_openowner *local; |
1da177e4 | 3088 | |
fe0750e5 BF |
3089 | list_for_each_entry(local, &close_lru, oo_close_lru) { |
3090 | if (local->oo_owner.so_id == st_id) | |
f4dee24c | 3091 | return local; |
1da177e4 LT |
3092 | } |
3093 | return NULL; | |
3094 | } | |
3095 | ||
3096 | static inline int | |
3097 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
3098 | { | |
f9d7562f | 3099 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
3100 | } |
3101 | ||
3102 | static int | |
3103 | STALE_STATEID(stateid_t *stateid) | |
3104 | { | |
e4e83ea4 BF |
3105 | if (stateid->si_boot == boot_time) |
3106 | return 0; | |
3107 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3108 | STATEID_VAL(stateid)); |
e4e83ea4 | 3109 | return 1; |
1da177e4 LT |
3110 | } |
3111 | ||
3112 | static inline int | |
3113 | access_permit_read(unsigned long access_bmap) | |
3114 | { | |
3115 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3116 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3117 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3118 | } | |
3119 | ||
3120 | static inline int | |
3121 | access_permit_write(unsigned long access_bmap) | |
3122 | { | |
3123 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3124 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3125 | } | |
3126 | ||
3127 | static | |
b37ad28b | 3128 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 3129 | { |
b37ad28b | 3130 | __be32 status = nfserr_openmode; |
1da177e4 | 3131 | |
02921914 BF |
3132 | /* For lock stateid's, we test the parent open, not the lock: */ |
3133 | if (stp->st_openstp) | |
3134 | stp = stp->st_openstp; | |
1da177e4 LT |
3135 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3136 | goto out; | |
3137 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3138 | goto out; | |
3139 | status = nfs_ok; | |
3140 | out: | |
3141 | return status; | |
3142 | } | |
3143 | ||
b37ad28b | 3144 | static inline __be32 |
1da177e4 LT |
3145 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3146 | { | |
203a8c8e | 3147 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3148 | return nfs_ok; |
af558e33 | 3149 | else if (locks_in_grace()) { |
25985edc | 3150 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3151 | * conflicting state; so we must wait out the grace period. */ |
3152 | return nfserr_grace; | |
3153 | } else if (flags & WR_STATE) | |
3154 | return nfs4_share_conflict(current_fh, | |
3155 | NFS4_SHARE_DENY_WRITE); | |
3156 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3157 | return nfs4_share_conflict(current_fh, | |
3158 | NFS4_SHARE_DENY_READ); | |
3159 | } | |
3160 | ||
3161 | /* | |
3162 | * Allow READ/WRITE during grace period on recovered state only for files | |
3163 | * that are not able to provide mandatory locking. | |
3164 | */ | |
3165 | static inline int | |
18f82731 | 3166 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3167 | { |
203a8c8e | 3168 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3169 | } |
3170 | ||
81b82965 BF |
3171 | /* Returns true iff a is later than b: */ |
3172 | static bool stateid_generation_after(stateid_t *a, stateid_t *b) | |
3173 | { | |
3174 | return (s32)a->si_generation - (s32)b->si_generation > 0; | |
3175 | } | |
3176 | ||
28dde241 | 3177 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) |
0836f587 | 3178 | { |
6668958f AA |
3179 | /* |
3180 | * When sessions are used the stateid generation number is ignored | |
3181 | * when it is zero. | |
3182 | */ | |
28dde241 | 3183 | if (has_session && in->si_generation == 0) |
81b82965 BF |
3184 | return nfs_ok; |
3185 | ||
3186 | if (in->si_generation == ref->si_generation) | |
3187 | return nfs_ok; | |
6668958f | 3188 | |
0836f587 | 3189 | /* If the client sends us a stateid from the future, it's buggy: */ |
81b82965 | 3190 | if (stateid_generation_after(in, ref)) |
0836f587 BF |
3191 | return nfserr_bad_stateid; |
3192 | /* | |
81b82965 BF |
3193 | * However, we could see a stateid from the past, even from a |
3194 | * non-buggy client. For example, if the client sends a lock | |
3195 | * while some IO is outstanding, the lock may bump si_generation | |
3196 | * while the IO is still in flight. The client could avoid that | |
3197 | * situation by waiting for responses on all the IO requests, | |
3198 | * but better performance may result in retrying IO that | |
3199 | * receives an old_stateid error if requests are rarely | |
3200 | * reordered in flight: | |
0836f587 | 3201 | */ |
81b82965 | 3202 | return nfserr_old_stateid; |
0836f587 BF |
3203 | } |
3204 | ||
3e633079 BF |
3205 | static int is_delegation_stateid(stateid_t *stateid) |
3206 | { | |
3207 | return stateid->si_fileid == 0; | |
3208 | } | |
3209 | ||
28dde241 | 3210 | __be32 nfs4_validate_stateid(stateid_t *stateid, bool has_session) |
17456804 BS |
3211 | { |
3212 | struct nfs4_stateid *stp = NULL; | |
3213 | __be32 status = nfserr_stale_stateid; | |
3214 | ||
3215 | if (STALE_STATEID(stateid)) | |
3216 | goto out; | |
3217 | ||
3218 | status = nfserr_expired; | |
b79abadd | 3219 | stp = find_stateid(stateid, 0); |
17456804 BS |
3220 | if (!stp) |
3221 | goto out; | |
3222 | status = nfserr_bad_stateid; | |
3223 | ||
fe0750e5 BF |
3224 | if (stp->st_stateowner->so_is_open_owner |
3225 | && !openowner(stp->st_stateowner)->oo_confirmed) | |
17456804 BS |
3226 | goto out; |
3227 | ||
28dde241 | 3228 | status = check_stateid_generation(stateid, &stp->st_stateid, has_session); |
17456804 BS |
3229 | if (status) |
3230 | goto out; | |
3231 | ||
3232 | status = nfs_ok; | |
3233 | out: | |
3234 | return status; | |
3235 | } | |
3236 | ||
1da177e4 LT |
3237 | /* |
3238 | * Checks for stateid operations | |
3239 | */ | |
b37ad28b | 3240 | __be32 |
dd453dfd BH |
3241 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3242 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
3243 | { |
3244 | struct nfs4_stateid *stp = NULL; | |
3245 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 3246 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3247 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3248 | __be32 status; |
1da177e4 | 3249 | |
1da177e4 LT |
3250 | if (filpp) |
3251 | *filpp = NULL; | |
3252 | ||
18f82731 | 3253 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3254 | return nfserr_grace; |
3255 | ||
3256 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3257 | return check_special_stateids(current_fh, stateid, flags); | |
3258 | ||
1da177e4 LT |
3259 | status = nfserr_stale_stateid; |
3260 | if (STALE_STATEID(stateid)) | |
3261 | goto out; | |
3262 | ||
33515142 BF |
3263 | /* |
3264 | * We assume that any stateid that has the current boot time, | |
3265 | * but that we can't find, is expired: | |
3266 | */ | |
3267 | status = nfserr_expired; | |
3e633079 | 3268 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 3269 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 3270 | if (!dp) |
1da177e4 | 3271 | goto out; |
28dde241 | 3272 | status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); |
0c2a498f BF |
3273 | if (status) |
3274 | goto out; | |
dc9bf700 BF |
3275 | status = nfs4_check_delegmode(dp, flags); |
3276 | if (status) | |
3277 | goto out; | |
3278 | renew_client(dp->dl_client); | |
43b0178e | 3279 | if (filpp) { |
acfdf5c3 | 3280 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3281 | BUG_ON(!*filpp); |
3282 | } | |
1da177e4 | 3283 | } else { /* open or lock stateid */ |
a4455be0 | 3284 | stp = find_stateid(stateid, flags); |
e4e83ea4 | 3285 | if (!stp) |
1da177e4 | 3286 | goto out; |
33515142 | 3287 | status = nfserr_bad_stateid; |
6150ef0d | 3288 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 | 3289 | goto out; |
fe0750e5 BF |
3290 | if (stp->st_stateowner->so_is_open_owner |
3291 | && !openowner(stp->st_stateowner)->oo_confirmed) | |
1da177e4 | 3292 | goto out; |
6668958f | 3293 | status = check_stateid_generation(stateid, &stp->st_stateid, |
28dde241 | 3294 | nfsd4_has_session(cstate)); |
0c2a498f BF |
3295 | if (status) |
3296 | goto out; | |
a4455be0 BF |
3297 | status = nfs4_check_openmode(stp, flags); |
3298 | if (status) | |
1da177e4 LT |
3299 | goto out; |
3300 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3301 | if (filpp) { |
3302 | if (flags & RD_STATE) | |
3303 | *filpp = find_readable_file(stp->st_file); | |
3304 | else | |
3305 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3306 | } |
1da177e4 LT |
3307 | } |
3308 | status = nfs_ok; | |
3309 | out: | |
3310 | return status; | |
3311 | } | |
3312 | ||
e1ca12df BS |
3313 | static __be32 |
3314 | nfsd4_free_delegation_stateid(stateid_t *stateid) | |
3315 | { | |
3316 | struct nfs4_delegation *dp = search_for_delegation(stateid); | |
3317 | if (dp) | |
3318 | return nfserr_locks_held; | |
3319 | return nfserr_bad_stateid; | |
3320 | } | |
3321 | ||
3322 | static __be32 | |
3323 | nfsd4_free_lock_stateid(struct nfs4_stateid *stp) | |
3324 | { | |
fe0750e5 | 3325 | if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) |
e1ca12df BS |
3326 | return nfserr_locks_held; |
3327 | release_lock_stateid(stp); | |
3328 | return nfs_ok; | |
3329 | } | |
3330 | ||
17456804 BS |
3331 | /* |
3332 | * Test if the stateid is valid | |
3333 | */ | |
3334 | __be32 | |
3335 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3336 | struct nfsd4_test_stateid *test_stateid) | |
3337 | { | |
3338 | test_stateid->ts_has_session = nfsd4_has_session(cstate); | |
3339 | return nfs_ok; | |
3340 | } | |
3341 | ||
e1ca12df BS |
3342 | /* |
3343 | * Free a state id | |
3344 | */ | |
3345 | __be32 | |
3346 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3347 | struct nfsd4_free_stateid *free_stateid) | |
3348 | { | |
3349 | stateid_t *stateid = &free_stateid->fr_stateid; | |
3350 | struct nfs4_stateid *stp; | |
3351 | __be32 ret; | |
3352 | ||
3353 | nfs4_lock_state(); | |
3354 | if (is_delegation_stateid(stateid)) { | |
3355 | ret = nfsd4_free_delegation_stateid(stateid); | |
3356 | goto out; | |
3357 | } | |
3358 | ||
b79abadd | 3359 | stp = find_stateid(stateid, 0); |
e1ca12df BS |
3360 | if (!stp) { |
3361 | ret = nfserr_bad_stateid; | |
3362 | goto out; | |
3363 | } | |
81b82965 BF |
3364 | ret = check_stateid_generation(stateid, &stp->st_stateid, 1); |
3365 | if (ret) | |
3366 | goto out; | |
e1ca12df | 3367 | |
5fa0bbb4 | 3368 | if (stp->st_type == NFS4_OPEN_STID) { |
e1ca12df BS |
3369 | ret = nfserr_locks_held; |
3370 | goto out; | |
3371 | } else { | |
3372 | ret = nfsd4_free_lock_stateid(stp); | |
3373 | goto out; | |
3374 | } | |
3375 | ||
3376 | out: | |
3377 | nfs4_unlock_state(); | |
3378 | return ret; | |
3379 | } | |
3380 | ||
4c4cd222 N |
3381 | static inline int |
3382 | setlkflg (int type) | |
3383 | { | |
3384 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3385 | RD_STATE : WR_STATE; | |
3386 | } | |
1da177e4 LT |
3387 | |
3388 | /* | |
3389 | * Checks for sequence id mutating operations. | |
3390 | */ | |
b37ad28b | 3391 | static __be32 |
dd453dfd BH |
3392 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3393 | stateid_t *stateid, int flags, | |
b34f27aa | 3394 | struct nfs4_stateid **stpp) |
1da177e4 | 3395 | { |
1da177e4 | 3396 | struct nfs4_stateowner *sop; |
dd453dfd | 3397 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 3398 | __be32 status; |
1da177e4 | 3399 | |
8c10cbdb BH |
3400 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3401 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3402 | |
1da177e4 | 3403 | *stpp = NULL; |
1da177e4 | 3404 | |
1da177e4 | 3405 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 3406 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 3407 | return nfserr_bad_stateid; |
1da177e4 LT |
3408 | } |
3409 | ||
1da177e4 | 3410 | if (STALE_STATEID(stateid)) |
3a4f98bb | 3411 | return nfserr_stale_stateid; |
6668958f | 3412 | |
1da177e4 LT |
3413 | /* |
3414 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
3415 | * the confirmed flag is incorrecly set, or the generation | |
3416 | * number is incorrect. | |
1da177e4 | 3417 | */ |
f4dee24c BF |
3418 | *stpp = find_stateid(stateid, flags); |
3419 | if (*stpp == NULL) | |
3420 | return nfserr_expired; | |
1da177e4 | 3421 | |
f4dee24c | 3422 | sop = (*stpp)->st_stateowner; |
f3e42237 | 3423 | cstate->replay_owner = sop; |
39325bd0 | 3424 | |
f4dee24c | 3425 | if (nfs4_check_fh(current_fh, *stpp)) { |
2fdada03 | 3426 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 3427 | return nfserr_bad_stateid; |
1da177e4 LT |
3428 | } |
3429 | ||
7a8711c9 BF |
3430 | status = nfsd4_check_seqid(cstate, sop, seqid); |
3431 | if (status) | |
3432 | return status; | |
1da177e4 | 3433 | |
fe0750e5 BF |
3434 | if (sop->so_is_open_owner && !openowner(sop)->oo_confirmed |
3435 | && !(flags & CONFIRM)) { | |
2fdada03 | 3436 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3437 | " confirmed yet!\n"); |
3438 | return nfserr_bad_stateid; | |
1da177e4 | 3439 | } |
f4dee24c | 3440 | status = check_stateid_generation(stateid, &(*stpp)->st_stateid, nfsd4_has_session(cstate)); |
0836f587 BF |
3441 | if (status) |
3442 | return status; | |
52fd004e | 3443 | renew_client(sop->so_client); |
3a4f98bb | 3444 | return nfs_ok; |
1da177e4 LT |
3445 | } |
3446 | ||
b37ad28b | 3447 | __be32 |
ca364317 | 3448 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3449 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3450 | { |
b37ad28b | 3451 | __be32 status; |
fe0750e5 | 3452 | struct nfs4_openowner *oo; |
1da177e4 LT |
3453 | struct nfs4_stateid *stp; |
3454 | ||
3455 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3456 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3457 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3458 | |
ca364317 | 3459 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3460 | if (status) |
3461 | return status; | |
1da177e4 LT |
3462 | |
3463 | nfs4_lock_state(); | |
3464 | ||
9072d5c6 | 3465 | status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3466 | oc->oc_seqid, &oc->oc_req_stateid, |
9072d5c6 BF |
3467 | CONFIRM | OPEN_STATE, &stp); |
3468 | if (status) | |
68b66e82 | 3469 | goto out; |
fe0750e5 | 3470 | oo = openowner(stp->st_stateowner); |
68b66e82 | 3471 | status = nfserr_bad_stateid; |
fe0750e5 | 3472 | if (oo->oo_confirmed) |
68b66e82 | 3473 | goto out; |
fe0750e5 | 3474 | oo->oo_confirmed = 1; |
1da177e4 LT |
3475 | update_stateid(&stp->st_stateid); |
3476 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3477 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3478 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 | 3479 | |
fe0750e5 | 3480 | nfsd4_create_clid_dir(oo->oo_owner.so_client); |
68b66e82 | 3481 | status = nfs_ok; |
1da177e4 | 3482 | out: |
5ec094c1 BF |
3483 | if (!cstate->replay_owner) |
3484 | nfs4_unlock_state(); | |
1da177e4 LT |
3485 | return status; |
3486 | } | |
3487 | ||
f197c271 | 3488 | static inline void nfs4_file_downgrade(struct nfs4_stateid *stp, unsigned int to_access) |
1da177e4 LT |
3489 | { |
3490 | int i; | |
f197c271 | 3491 | |
1da177e4 | 3492 | for (i = 1; i < 4; i++) { |
f197c271 BF |
3493 | if (test_bit(i, &stp->st_access_bmap) && !(i & to_access)) { |
3494 | nfs4_file_put_access(stp->st_file, i); | |
3495 | __clear_bit(i, &stp->st_access_bmap); | |
3496 | } | |
1da177e4 LT |
3497 | } |
3498 | } | |
3499 | ||
3500 | static void | |
3501 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3502 | { | |
3503 | int i; | |
3504 | for (i = 0; i < 4; i++) { | |
3505 | if ((i & deny) != i) | |
3506 | __clear_bit(i, bmap); | |
3507 | } | |
3508 | } | |
3509 | ||
b37ad28b | 3510 | __be32 |
ca364317 BF |
3511 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3512 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3513 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3514 | { |
b37ad28b | 3515 | __be32 status; |
1da177e4 | 3516 | struct nfs4_stateid *stp; |
1da177e4 LT |
3517 | |
3518 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3519 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3520 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3521 | |
d87a8ade | 3522 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3523 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3524 | return nfserr_inval; |
3525 | ||
3526 | nfs4_lock_state(); | |
9072d5c6 BF |
3527 | status = nfs4_preprocess_seqid_op(cstate, od->od_seqid, |
3528 | &od->od_stateid, OPEN_STATE, &stp); | |
3529 | if (status) | |
1da177e4 | 3530 | goto out; |
1da177e4 LT |
3531 | status = nfserr_inval; |
3532 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3533 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3534 | stp->st_access_bmap, od->od_share_access); | |
3535 | goto out; | |
3536 | } | |
3537 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3538 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3539 | stp->st_deny_bmap, od->od_share_deny); | |
3540 | goto out; | |
3541 | } | |
f197c271 | 3542 | nfs4_file_downgrade(stp, od->od_share_access); |
1da177e4 | 3543 | |
1da177e4 LT |
3544 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3545 | ||
3546 | update_stateid(&stp->st_stateid); | |
3547 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3548 | status = nfs_ok; | |
3549 | out: | |
5ec094c1 BF |
3550 | if (!cstate->replay_owner) |
3551 | nfs4_unlock_state(); | |
1da177e4 LT |
3552 | return status; |
3553 | } | |
3554 | ||
3555 | /* | |
3556 | * nfs4_unlock_state() called after encode | |
3557 | */ | |
b37ad28b | 3558 | __be32 |
ca364317 | 3559 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3560 | struct nfsd4_close *close) |
1da177e4 | 3561 | { |
b37ad28b | 3562 | __be32 status; |
fe0750e5 | 3563 | struct nfs4_openowner *oo; |
1da177e4 LT |
3564 | struct nfs4_stateid *stp; |
3565 | ||
3566 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3567 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3568 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3569 | |
3570 | nfs4_lock_state(); | |
3571 | /* check close_lru for replay */ | |
9072d5c6 | 3572 | status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, |
1da177e4 | 3573 | &close->cl_stateid, |
f4dee24c BF |
3574 | OPEN_STATE, &stp); |
3575 | if (stp == NULL && status == nfserr_expired) { | |
3576 | /* | |
3577 | * Also, we should make sure this isn't just the result of | |
3578 | * a replayed close: | |
3579 | */ | |
fe0750e5 | 3580 | oo = search_close_lru(close->cl_stateid.si_stateownerid); |
f4dee24c | 3581 | /* It's not stale; let's assume it's expired: */ |
fe0750e5 | 3582 | if (oo == NULL) |
f4dee24c | 3583 | goto out; |
fe0750e5 BF |
3584 | cstate->replay_owner = &oo->oo_owner; |
3585 | status = nfsd4_check_seqid(cstate, &oo->oo_owner, close->cl_seqid); | |
f4dee24c BF |
3586 | if (status) |
3587 | goto out; | |
3588 | status = nfserr_bad_seqid; | |
3589 | } | |
9072d5c6 | 3590 | if (status) |
1da177e4 | 3591 | goto out; |
fe0750e5 | 3592 | oo = openowner(stp->st_stateowner); |
1da177e4 LT |
3593 | status = nfs_ok; |
3594 | update_stateid(&stp->st_stateid); | |
3595 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3596 | ||
04ef5954 | 3597 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3598 | release_open_stateid(stp); |
04ef5954 BF |
3599 | |
3600 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3601 | * released by the laundromat service after the lease period | |
3602 | * to enable us to handle CLOSE replay | |
3603 | */ | |
fe0750e5 BF |
3604 | if (list_empty(&oo->oo_owner.so_stateids)) |
3605 | move_to_close_lru(oo); | |
1da177e4 | 3606 | out: |
5ec094c1 BF |
3607 | if (!cstate->replay_owner) |
3608 | nfs4_unlock_state(); | |
1da177e4 LT |
3609 | return status; |
3610 | } | |
3611 | ||
b37ad28b | 3612 | __be32 |
ca364317 BF |
3613 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3614 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3615 | { |
203a8c8e BF |
3616 | struct nfs4_delegation *dp; |
3617 | stateid_t *stateid = &dr->dr_stateid; | |
3618 | struct inode *inode; | |
b37ad28b | 3619 | __be32 status; |
1da177e4 | 3620 | |
ca364317 | 3621 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3622 | return status; |
3623 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
3624 | |
3625 | nfs4_lock_state(); | |
203a8c8e BF |
3626 | status = nfserr_bad_stateid; |
3627 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3628 | goto out; | |
3629 | status = nfserr_stale_stateid; | |
3630 | if (STALE_STATEID(stateid)) | |
3631 | goto out; | |
7e0f7cf5 | 3632 | status = nfserr_bad_stateid; |
203a8c8e BF |
3633 | if (!is_delegation_stateid(stateid)) |
3634 | goto out; | |
33515142 | 3635 | status = nfserr_expired; |
203a8c8e | 3636 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3637 | if (!dp) |
203a8c8e | 3638 | goto out; |
28dde241 | 3639 | status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); |
203a8c8e BF |
3640 | if (status) |
3641 | goto out; | |
3642 | renew_client(dp->dl_client); | |
3643 | ||
3644 | unhash_delegation(dp); | |
1da177e4 | 3645 | out: |
203a8c8e BF |
3646 | nfs4_unlock_state(); |
3647 | ||
1da177e4 LT |
3648 | return status; |
3649 | } | |
3650 | ||
3651 | ||
3652 | /* | |
3653 | * Lock owner state (byte-range locks) | |
3654 | */ | |
3655 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3656 | #define LOCK_HASH_BITS 8 | |
3657 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3658 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3659 | ||
87df4de8 BH |
3660 | static inline u64 |
3661 | end_offset(u64 start, u64 len) | |
3662 | { | |
3663 | u64 end; | |
3664 | ||
3665 | end = start + len; | |
3666 | return end >= start ? end: NFS4_MAX_UINT64; | |
3667 | } | |
3668 | ||
3669 | /* last octet in a range */ | |
3670 | static inline u64 | |
3671 | last_byte_offset(u64 start, u64 len) | |
3672 | { | |
3673 | u64 end; | |
3674 | ||
3675 | BUG_ON(!len); | |
3676 | end = start + len; | |
3677 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3678 | } | |
3679 | ||
ddc04c41 BF |
3680 | static unsigned int lockownerid_hashval(u32 id) |
3681 | { | |
3682 | return id & LOCK_HASH_MASK; | |
3683 | } | |
1da177e4 LT |
3684 | |
3685 | static inline unsigned int | |
3686 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3687 | struct xdr_netobj *ownername) | |
3688 | { | |
3689 | return (file_hashval(inode) + cl_id | |
3690 | + opaque_hashval(ownername->data, ownername->len)) | |
3691 | & LOCK_HASH_MASK; | |
3692 | } | |
3693 | ||
3694 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3695 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
1da177e4 | 3696 | |
e1ca12df BS |
3697 | static int |
3698 | same_stateid(stateid_t *id_one, stateid_t *id_two) | |
3699 | { | |
3700 | if (id_one->si_stateownerid != id_two->si_stateownerid) | |
3701 | return 0; | |
3702 | return id_one->si_fileid == id_two->si_fileid; | |
3703 | } | |
3704 | ||
b79abadd | 3705 | static struct nfs4_stateid *find_stateid(stateid_t *t, int flags) |
1da177e4 | 3706 | { |
b79abadd | 3707 | struct nfs4_stateid *s; |
1da177e4 LT |
3708 | unsigned int hashval; |
3709 | ||
b79abadd BF |
3710 | hashval = stateid_hashval(t->si_stateownerid, t->si_fileid); |
3711 | list_for_each_entry(s, &stateid_hashtbl[hashval], st_hash) { | |
3712 | if (!same_stateid(&s->st_stateid, t)) | |
3713 | continue; | |
3714 | if (flags & LOCK_STATE && s->st_type != NFS4_LOCK_STID) | |
3715 | return NULL; | |
3716 | if (flags & OPEN_STATE && s->st_type != NFS4_OPEN_STID) | |
3717 | return NULL; | |
3718 | return s; | |
1da177e4 | 3719 | } |
e1ca12df BS |
3720 | return NULL; |
3721 | } | |
3722 | ||
3723 | static struct nfs4_delegation * | |
3724 | search_for_delegation(stateid_t *stid) | |
3725 | { | |
3726 | struct nfs4_file *fp; | |
3727 | struct nfs4_delegation *dp; | |
3728 | struct list_head *pos; | |
3729 | int i; | |
3730 | ||
3731 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3732 | list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { | |
3733 | list_for_each(pos, &fp->fi_delegations) { | |
3734 | dp = list_entry(pos, struct nfs4_delegation, dl_perfile); | |
3735 | if (same_stateid(&dp->dl_stateid, stid)) | |
3736 | return dp; | |
3737 | } | |
3738 | } | |
3739 | } | |
3740 | return NULL; | |
3741 | } | |
3742 | ||
1da177e4 LT |
3743 | static struct nfs4_delegation * |
3744 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3745 | { | |
13cd2184 N |
3746 | struct nfs4_file *fp; |
3747 | struct nfs4_delegation *dl; | |
1da177e4 | 3748 | |
8c10cbdb BH |
3749 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3750 | STATEID_VAL(stid)); | |
1da177e4 | 3751 | |
1da177e4 | 3752 | fp = find_file(ino); |
13cd2184 N |
3753 | if (!fp) |
3754 | return NULL; | |
3755 | dl = find_delegation_file(fp, stid); | |
3756 | put_nfs4_file(fp); | |
3757 | return dl; | |
1da177e4 LT |
3758 | } |
3759 | ||
3760 | /* | |
3761 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3762 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3763 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3764 | * locking, this prevents us from being completely protocol-compliant. The | |
3765 | * real solution to this problem is to start using unsigned file offsets in | |
3766 | * the VFS, but this is a very deep change! | |
3767 | */ | |
3768 | static inline void | |
3769 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3770 | { | |
3771 | if (lock->fl_start < 0) | |
3772 | lock->fl_start = OFFSET_MAX; | |
3773 | if (lock->fl_end < 0) | |
3774 | lock->fl_end = OFFSET_MAX; | |
3775 | } | |
3776 | ||
d5b9026a N |
3777 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3778 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3779 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3780 | }; |
1da177e4 LT |
3781 | |
3782 | static inline void | |
3783 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3784 | { | |
fe0750e5 | 3785 | struct nfs4_lockowner *lo; |
1da177e4 | 3786 | |
d5b9026a | 3787 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
fe0750e5 BF |
3788 | lo = (struct nfs4_lockowner *) fl->fl_owner; |
3789 | deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, | |
3790 | lo->lo_owner.so_owner.len, GFP_KERNEL); | |
7c13f344 BF |
3791 | if (!deny->ld_owner.data) |
3792 | /* We just don't care that much */ | |
3793 | goto nevermind; | |
fe0750e5 BF |
3794 | deny->ld_owner.len = lo->lo_owner.so_owner.len; |
3795 | deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; | |
d5b9026a | 3796 | } else { |
7c13f344 BF |
3797 | nevermind: |
3798 | deny->ld_owner.len = 0; | |
3799 | deny->ld_owner.data = NULL; | |
d5b9026a N |
3800 | deny->ld_clientid.cl_boot = 0; |
3801 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3802 | } |
3803 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3804 | deny->ld_length = NFS4_MAX_UINT64; |
3805 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3806 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3807 | deny->ld_type = NFS4_READ_LT; | |
3808 | if (fl->fl_type != F_RDLCK) | |
3809 | deny->ld_type = NFS4_WRITE_LT; | |
3810 | } | |
3811 | ||
fe0750e5 BF |
3812 | static struct nfs4_lockowner * |
3813 | find_lockowner_str(struct inode *inode, clientid_t *clid, | |
1da177e4 LT |
3814 | struct xdr_netobj *owner) |
3815 | { | |
3816 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3817 | struct nfs4_stateowner *op; | |
3818 | ||
3819 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3820 | if (same_owner_str(op, owner, clid)) |
fe0750e5 | 3821 | return lockowner(op); |
1da177e4 LT |
3822 | } |
3823 | return NULL; | |
3824 | } | |
3825 | ||
fe0750e5 | 3826 | static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp) |
ff194bd9 BF |
3827 | { |
3828 | unsigned int idhashval; | |
3829 | ||
fe0750e5 BF |
3830 | idhashval = lockownerid_hashval(lo->lo_owner.so_id); |
3831 | list_add(&lo->lo_owner.so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3832 | list_add(&lo->lo_owner.so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
3833 | list_add(&lo->lo_perstateid, &open_stp->st_lockowners); | |
ff194bd9 BF |
3834 | } |
3835 | ||
1da177e4 LT |
3836 | /* |
3837 | * Alloc a lock owner structure. | |
3838 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3839 | * occurred. |
1da177e4 LT |
3840 | * |
3841 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3842 | */ |
3843 | ||
fe0750e5 | 3844 | static struct nfs4_lockowner * |
1da177e4 | 3845 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { |
fe0750e5 | 3846 | struct nfs4_lockowner *lo; |
1da177e4 | 3847 | |
fe0750e5 BF |
3848 | lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); |
3849 | if (!lo) | |
1da177e4 | 3850 | return NULL; |
fe0750e5 BF |
3851 | INIT_LIST_HEAD(&lo->lo_owner.so_stateids); |
3852 | lo->lo_owner.so_is_open_owner = 0; | |
b59e3c0e NB |
3853 | /* It is the openowner seqid that will be incremented in encode in the |
3854 | * case of new lockowners; so increment the lock seqid manually: */ | |
fe0750e5 BF |
3855 | lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; |
3856 | hash_lockowner(lo, strhashval, clp, open_stp); | |
3857 | return lo; | |
1da177e4 LT |
3858 | } |
3859 | ||
fd39ca9a | 3860 | static struct nfs4_stateid * |
fe0750e5 | 3861 | alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
1da177e4 LT |
3862 | { |
3863 | struct nfs4_stateid *stp; | |
fe0750e5 | 3864 | unsigned int hashval = stateid_hashval(lo->lo_owner.so_id, fp->fi_id); |
1da177e4 | 3865 | |
5ac049ac N |
3866 | stp = nfs4_alloc_stateid(); |
3867 | if (stp == NULL) | |
1da177e4 LT |
3868 | goto out; |
3869 | INIT_LIST_HEAD(&stp->st_hash); | |
3870 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3871 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3872 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
b79abadd | 3873 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); |
8beefa24 | 3874 | list_add(&stp->st_perfile, &fp->fi_stateids); |
fe0750e5 BF |
3875 | list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); |
3876 | stp->st_stateowner = &lo->lo_owner; | |
5fa0bbb4 | 3877 | stp->st_type = NFS4_LOCK_STID; |
13cd2184 | 3878 | get_nfs4_file(fp); |
1da177e4 | 3879 | stp->st_file = fp; |
e4e83ea4 | 3880 | stp->st_stateid.si_boot = boot_time; |
fe0750e5 | 3881 | stp->st_stateid.si_stateownerid = lo->lo_owner.so_id; |
1da177e4 | 3882 | stp->st_stateid.si_fileid = fp->fi_id; |
73997dc4 | 3883 | /* note will be incremented before first return to client: */ |
1da177e4 | 3884 | stp->st_stateid.si_generation = 0; |
0997b173 | 3885 | stp->st_access_bmap = 0; |
1da177e4 | 3886 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3887 | stp->st_openstp = open_stp; |
1da177e4 LT |
3888 | |
3889 | out: | |
3890 | return stp; | |
3891 | } | |
3892 | ||
fd39ca9a | 3893 | static int |
1da177e4 LT |
3894 | check_lock_length(u64 offset, u64 length) |
3895 | { | |
87df4de8 | 3896 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3897 | LOFF_OVERFLOW(offset, length))); |
3898 | } | |
3899 | ||
0997b173 BF |
3900 | static void get_lock_access(struct nfs4_stateid *lock_stp, u32 access) |
3901 | { | |
3902 | struct nfs4_file *fp = lock_stp->st_file; | |
3903 | int oflag = nfs4_access_to_omode(access); | |
3904 | ||
3905 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3906 | return; | |
3907 | nfs4_file_get_access(fp, oflag); | |
3908 | __set_bit(access, &lock_stp->st_access_bmap); | |
3909 | } | |
3910 | ||
1da177e4 LT |
3911 | /* |
3912 | * LOCK operation | |
3913 | */ | |
b37ad28b | 3914 | __be32 |
ca364317 | 3915 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3916 | struct nfsd4_lock *lock) |
1da177e4 | 3917 | { |
fe0750e5 BF |
3918 | struct nfs4_openowner *open_sop = NULL; |
3919 | struct nfs4_lockowner *lock_sop = NULL; | |
1da177e4 | 3920 | struct nfs4_stateid *lock_stp; |
7d947842 BF |
3921 | struct nfs4_file *fp; |
3922 | struct file *filp = NULL; | |
1da177e4 | 3923 | struct file_lock file_lock; |
8dc7c311 | 3924 | struct file_lock conflock; |
b37ad28b | 3925 | __be32 status = 0; |
1da177e4 | 3926 | unsigned int strhashval; |
b34f27aa | 3927 | int lkflg; |
b8dd7b9a | 3928 | int err; |
1da177e4 LT |
3929 | |
3930 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3931 | (long long) lock->lk_offset, | |
3932 | (long long) lock->lk_length); | |
3933 | ||
1da177e4 LT |
3934 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3935 | return nfserr_inval; | |
3936 | ||
ca364317 | 3937 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3938 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3939 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3940 | return status; | |
3941 | } | |
3942 | ||
1da177e4 LT |
3943 | nfs4_lock_state(); |
3944 | ||
3945 | if (lock->lk_is_new) { | |
893f8770 N |
3946 | /* |
3947 | * Client indicates that this is a new lockowner. | |
3948 | * Use open owner and open stateid to create lock owner and | |
3949 | * lock stateid. | |
3950 | */ | |
1da177e4 | 3951 | struct nfs4_stateid *open_stp = NULL; |
1da177e4 LT |
3952 | |
3953 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3954 | if (!nfsd4_has_session(cstate) && |
3955 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3956 | goto out; |
1da177e4 | 3957 | |
1da177e4 | 3958 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3959 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3960 | lock->lk_new_open_seqid, |
3961 | &lock->lk_new_open_stateid, | |
9072d5c6 | 3962 | OPEN_STATE, &open_stp); |
37515177 | 3963 | if (status) |
1da177e4 | 3964 | goto out; |
fe0750e5 | 3965 | open_sop = openowner(open_stp->st_stateowner); |
b34f27aa | 3966 | status = nfserr_bad_stateid; |
b34f27aa | 3967 | if (!nfsd4_has_session(cstate) && |
fe0750e5 | 3968 | !same_clid(&open_sop->oo_owner.so_client->cl_clientid, |
b34f27aa BF |
3969 | &lock->v.new.clientid)) |
3970 | goto out; | |
1da177e4 LT |
3971 | /* create lockowner and lock stateid */ |
3972 | fp = open_stp->st_file; | |
fe0750e5 BF |
3973 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
3974 | open_sop->oo_owner.so_client->cl_clientid.cl_id, | |
1da177e4 | 3975 | &lock->v.new.owner); |
3e9e3dbe N |
3976 | /* XXX: Do we need to check for duplicate stateowners on |
3977 | * the same file, or should they just be allowed (and | |
3978 | * create new stateids)? */ | |
3e772463 | 3979 | status = nfserr_jukebox; |
b59e3c0e | 3980 | lock_sop = alloc_init_lock_stateowner(strhashval, |
fe0750e5 | 3981 | open_sop->oo_owner.so_client, open_stp, lock); |
b59e3c0e | 3982 | if (lock_sop == NULL) |
1da177e4 | 3983 | goto out; |
b59e3c0e | 3984 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3985 | if (lock_stp == NULL) |
1da177e4 | 3986 | goto out; |
1da177e4 LT |
3987 | } else { |
3988 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3989 | status = nfs4_preprocess_seqid_op(cstate, |
fe0750e5 BF |
3990 | lock->lk_old_lock_seqid, |
3991 | &lock->lk_old_lock_stateid, | |
9072d5c6 | 3992 | LOCK_STATE, &lock_stp); |
1da177e4 LT |
3993 | if (status) |
3994 | goto out; | |
fe0750e5 | 3995 | lock_sop = lockowner(lock_stp->st_stateowner); |
7d947842 | 3996 | fp = lock_stp->st_file; |
1da177e4 | 3997 | } |
9072d5c6 | 3998 | /* lock_sop and lock_stp have been created or found */ |
1da177e4 | 3999 | |
b34f27aa BF |
4000 | lkflg = setlkflg(lock->lk_type); |
4001 | status = nfs4_check_openmode(lock_stp, lkflg); | |
4002 | if (status) | |
4003 | goto out; | |
4004 | ||
0dd395dc | 4005 | status = nfserr_grace; |
af558e33 | 4006 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4007 | goto out; |
4008 | status = nfserr_no_grace; | |
af558e33 | 4009 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4010 | goto out; |
4011 | ||
1da177e4 LT |
4012 | locks_init_lock(&file_lock); |
4013 | switch (lock->lk_type) { | |
4014 | case NFS4_READ_LT: | |
4015 | case NFS4_READW_LT: | |
0997b173 BF |
4016 | filp = find_readable_file(lock_stp->st_file); |
4017 | if (filp) | |
4018 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4019 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4020 | break; |
1da177e4 LT |
4021 | case NFS4_WRITE_LT: |
4022 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4023 | filp = find_writeable_file(lock_stp->st_file); |
4024 | if (filp) | |
4025 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4026 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4027 | break; |
1da177e4 LT |
4028 | default: |
4029 | status = nfserr_inval; | |
4030 | goto out; | |
4031 | } | |
f9d7562f BF |
4032 | if (!filp) { |
4033 | status = nfserr_openmode; | |
4034 | goto out; | |
4035 | } | |
b59e3c0e | 4036 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4037 | file_lock.fl_pid = current->tgid; |
4038 | file_lock.fl_file = filp; | |
4039 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4040 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4041 | |
4042 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4043 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4044 | nfs4_transform_lock_offset(&file_lock); |
4045 | ||
4046 | /* | |
4047 | * Try to lock the file in the VFS. | |
4048 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4049 | */ | |
4050 | ||
529d7b2a | 4051 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4052 | switch (-err) { |
1da177e4 LT |
4053 | case 0: /* success! */ |
4054 | update_stateid(&lock_stp->st_stateid); | |
4055 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
4056 | sizeof(stateid_t)); | |
b8dd7b9a | 4057 | status = 0; |
eb76b3fd AA |
4058 | break; |
4059 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4060 | status = nfserr_denied; | |
4061 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4062 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4063 | break; | |
1da177e4 LT |
4064 | case (EDEADLK): |
4065 | status = nfserr_deadlock; | |
eb76b3fd | 4066 | break; |
3e772463 | 4067 | default: |
fd85b817 | 4068 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
3e772463 | 4069 | status = nfserrno(err); |
eb76b3fd | 4070 | break; |
1da177e4 | 4071 | } |
1da177e4 | 4072 | out: |
8a280510 | 4073 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 4074 | release_lockowner(lock_sop); |
5ec094c1 BF |
4075 | if (!cstate->replay_owner) |
4076 | nfs4_unlock_state(); | |
1da177e4 LT |
4077 | return status; |
4078 | } | |
4079 | ||
55ef1274 BF |
4080 | /* |
4081 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4082 | * so we do a temporary open here just to get an open file to pass to | |
4083 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4084 | * inode operation.) | |
4085 | */ | |
4086 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4087 | { | |
4088 | struct file *file; | |
4089 | int err; | |
4090 | ||
4091 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4092 | if (err) | |
4093 | return err; | |
4094 | err = vfs_test_lock(file, lock); | |
4095 | nfsd_close(file); | |
4096 | return err; | |
4097 | } | |
4098 | ||
1da177e4 LT |
4099 | /* |
4100 | * LOCKT operation | |
4101 | */ | |
b37ad28b | 4102 | __be32 |
ca364317 BF |
4103 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4104 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4105 | { |
4106 | struct inode *inode; | |
1da177e4 | 4107 | struct file_lock file_lock; |
fe0750e5 | 4108 | struct nfs4_lockowner *lo; |
fd85b817 | 4109 | int error; |
b37ad28b | 4110 | __be32 status; |
1da177e4 | 4111 | |
af558e33 | 4112 | if (locks_in_grace()) |
1da177e4 LT |
4113 | return nfserr_grace; |
4114 | ||
4115 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4116 | return nfserr_inval; | |
4117 | ||
1da177e4 LT |
4118 | nfs4_lock_state(); |
4119 | ||
4120 | status = nfserr_stale_clientid; | |
60adfc50 | 4121 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4122 | goto out; |
1da177e4 | 4123 | |
75c096f7 | 4124 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4125 | goto out; |
1da177e4 | 4126 | |
ca364317 | 4127 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4128 | locks_init_lock(&file_lock); |
4129 | switch (lockt->lt_type) { | |
4130 | case NFS4_READ_LT: | |
4131 | case NFS4_READW_LT: | |
4132 | file_lock.fl_type = F_RDLCK; | |
4133 | break; | |
4134 | case NFS4_WRITE_LT: | |
4135 | case NFS4_WRITEW_LT: | |
4136 | file_lock.fl_type = F_WRLCK; | |
4137 | break; | |
4138 | default: | |
2fdada03 | 4139 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4140 | status = nfserr_inval; |
4141 | goto out; | |
4142 | } | |
4143 | ||
fe0750e5 BF |
4144 | lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); |
4145 | if (lo) | |
4146 | file_lock.fl_owner = (fl_owner_t)lo; | |
1da177e4 LT |
4147 | file_lock.fl_pid = current->tgid; |
4148 | file_lock.fl_flags = FL_POSIX; | |
4149 | ||
4150 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4151 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4152 | |
4153 | nfs4_transform_lock_offset(&file_lock); | |
4154 | ||
1da177e4 | 4155 | status = nfs_ok; |
55ef1274 | 4156 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4157 | if (error) { |
4158 | status = nfserrno(error); | |
4159 | goto out; | |
4160 | } | |
9d6a8c5c | 4161 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4162 | status = nfserr_denied; |
9d6a8c5c | 4163 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4164 | } |
4165 | out: | |
4166 | nfs4_unlock_state(); | |
4167 | return status; | |
4168 | } | |
4169 | ||
b37ad28b | 4170 | __be32 |
ca364317 | 4171 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4172 | struct nfsd4_locku *locku) |
1da177e4 LT |
4173 | { |
4174 | struct nfs4_stateid *stp; | |
4175 | struct file *filp = NULL; | |
4176 | struct file_lock file_lock; | |
b37ad28b | 4177 | __be32 status; |
b8dd7b9a | 4178 | int err; |
1da177e4 LT |
4179 | |
4180 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4181 | (long long) locku->lu_offset, | |
4182 | (long long) locku->lu_length); | |
4183 | ||
4184 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4185 | return nfserr_inval; | |
4186 | ||
4187 | nfs4_lock_state(); | |
4188 | ||
9072d5c6 BF |
4189 | status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, |
4190 | &locku->lu_stateid, LOCK_STATE, &stp); | |
4191 | if (status) | |
1da177e4 | 4192 | goto out; |
f9d7562f BF |
4193 | filp = find_any_file(stp->st_file); |
4194 | if (!filp) { | |
4195 | status = nfserr_lock_range; | |
4196 | goto out; | |
4197 | } | |
1da177e4 LT |
4198 | BUG_ON(!filp); |
4199 | locks_init_lock(&file_lock); | |
4200 | file_lock.fl_type = F_UNLCK; | |
fe0750e5 | 4201 | file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); |
1da177e4 LT |
4202 | file_lock.fl_pid = current->tgid; |
4203 | file_lock.fl_file = filp; | |
4204 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4205 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4206 | file_lock.fl_start = locku->lu_offset; |
4207 | ||
87df4de8 | 4208 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4209 | nfs4_transform_lock_offset(&file_lock); |
4210 | ||
4211 | /* | |
4212 | * Try to unlock the file in the VFS. | |
4213 | */ | |
fd85b817 | 4214 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4215 | if (err) { |
fd85b817 | 4216 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4217 | goto out_nfserr; |
4218 | } | |
4219 | /* | |
4220 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4221 | */ | |
4222 | update_stateid(&stp->st_stateid); | |
4223 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
4224 | ||
4225 | out: | |
1da177e4 LT |
4226 | nfs4_unlock_state(); |
4227 | return status; | |
4228 | ||
4229 | out_nfserr: | |
b8dd7b9a | 4230 | status = nfserrno(err); |
1da177e4 LT |
4231 | goto out; |
4232 | } | |
4233 | ||
4234 | /* | |
4235 | * returns | |
4236 | * 1: locks held by lockowner | |
4237 | * 0: no locks held by lockowner | |
4238 | */ | |
4239 | static int | |
fe0750e5 | 4240 | check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) |
1da177e4 LT |
4241 | { |
4242 | struct file_lock **flpp; | |
f9d7562f | 4243 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4244 | int status = 0; |
4245 | ||
b89f4321 | 4246 | lock_flocks(); |
1da177e4 | 4247 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4248 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4249 | status = 1; |
4250 | goto out; | |
796dadfd | 4251 | } |
1da177e4 LT |
4252 | } |
4253 | out: | |
b89f4321 | 4254 | unlock_flocks(); |
1da177e4 LT |
4255 | return status; |
4256 | } | |
4257 | ||
b37ad28b | 4258 | __be32 |
b591480b BF |
4259 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4260 | struct nfsd4_compound_state *cstate, | |
4261 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4262 | { |
4263 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe | 4264 | struct nfs4_stateowner *sop; |
fe0750e5 | 4265 | struct nfs4_lockowner *lo; |
3e9e3dbe | 4266 | struct nfs4_stateid *stp; |
1da177e4 | 4267 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4268 | struct list_head matches; |
4269 | int i; | |
b37ad28b | 4270 | __be32 status; |
1da177e4 LT |
4271 | |
4272 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4273 | clid->cl_boot, clid->cl_id); | |
4274 | ||
4275 | /* XXX check for lease expiration */ | |
4276 | ||
4277 | status = nfserr_stale_clientid; | |
849823c5 | 4278 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4279 | return status; |
1da177e4 LT |
4280 | |
4281 | nfs4_lock_state(); | |
4282 | ||
3e9e3dbe N |
4283 | status = nfserr_locks_held; |
4284 | /* XXX: we're doing a linear search through all the lockowners. | |
4285 | * Yipes! For now we'll just hope clients aren't really using | |
4286 | * release_lockowner much, but eventually we have to fix these | |
4287 | * data structures. */ | |
4288 | INIT_LIST_HEAD(&matches); | |
4289 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4290 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 4291 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4292 | continue; |
4293 | list_for_each_entry(stp, &sop->so_stateids, | |
4294 | st_perstateowner) { | |
fe0750e5 BF |
4295 | lo = lockowner(sop); |
4296 | if (check_for_locks(stp->st_file, lo)) | |
3e9e3dbe | 4297 | goto out; |
fe0750e5 | 4298 | list_add(&lo->lo_list, &matches); |
3e9e3dbe | 4299 | } |
1da177e4 | 4300 | } |
3e9e3dbe N |
4301 | } |
4302 | /* Clients probably won't expect us to return with some (but not all) | |
4303 | * of the lockowner state released; so don't release any until all | |
4304 | * have been checked. */ | |
4305 | status = nfs_ok; | |
0fa822e4 | 4306 | while (!list_empty(&matches)) { |
fe0750e5 BF |
4307 | lo = list_entry(matches.next, struct nfs4_lockowner, |
4308 | lo_list); | |
0fa822e4 N |
4309 | /* unhash_stateowner deletes so_perclient only |
4310 | * for openowners. */ | |
fe0750e5 BF |
4311 | list_del(&lo->lo_list); |
4312 | release_lockowner(lo); | |
1da177e4 LT |
4313 | } |
4314 | out: | |
4315 | nfs4_unlock_state(); | |
4316 | return status; | |
4317 | } | |
4318 | ||
4319 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4320 | alloc_reclaim(void) |
1da177e4 | 4321 | { |
a55370a3 | 4322 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4323 | } |
4324 | ||
c7b9a459 | 4325 | int |
a1bcecd2 | 4326 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4327 | { |
4328 | unsigned int strhashval = clientstr_hashval(name); | |
4329 | struct nfs4_client *clp; | |
4330 | ||
e203d506 | 4331 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4332 | return clp ? 1 : 0; |
4333 | } | |
4334 | ||
1da177e4 LT |
4335 | /* |
4336 | * failure => all reset bets are off, nfserr_no_grace... | |
4337 | */ | |
190e4fbf N |
4338 | int |
4339 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4340 | { |
4341 | unsigned int strhashval; | |
4342 | struct nfs4_client_reclaim *crp = NULL; | |
4343 | ||
a55370a3 N |
4344 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4345 | crp = alloc_reclaim(); | |
1da177e4 LT |
4346 | if (!crp) |
4347 | return 0; | |
a55370a3 | 4348 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4349 | INIT_LIST_HEAD(&crp->cr_strhash); |
4350 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4351 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4352 | reclaim_str_hashtbl_size++; |
4353 | return 1; | |
4354 | } | |
4355 | ||
4356 | static void | |
4357 | nfs4_release_reclaim(void) | |
4358 | { | |
4359 | struct nfs4_client_reclaim *crp = NULL; | |
4360 | int i; | |
4361 | ||
1da177e4 LT |
4362 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4363 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4364 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4365 | struct nfs4_client_reclaim, cr_strhash); | |
4366 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4367 | kfree(crp); |
4368 | reclaim_str_hashtbl_size--; | |
4369 | } | |
4370 | } | |
4371 | BUG_ON(reclaim_str_hashtbl_size); | |
4372 | } | |
4373 | ||
4374 | /* | |
4375 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4376 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4377 | nfs4_find_reclaim_client(clientid_t *clid) |
4378 | { | |
4379 | unsigned int strhashval; | |
4380 | struct nfs4_client *clp; | |
4381 | struct nfs4_client_reclaim *crp = NULL; | |
4382 | ||
4383 | ||
4384 | /* find clientid in conf_id_hashtbl */ | |
4385 | clp = find_confirmed_client(clid); | |
4386 | if (clp == NULL) | |
4387 | return NULL; | |
4388 | ||
a55370a3 N |
4389 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4390 | clp->cl_name.len, clp->cl_name.data, | |
4391 | clp->cl_recdir); | |
1da177e4 LT |
4392 | |
4393 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4394 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4395 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4396 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4397 | return crp; |
4398 | } | |
4399 | } | |
4400 | return NULL; | |
4401 | } | |
4402 | ||
4403 | /* | |
4404 | * Called from OPEN. Look for clientid in reclaim list. | |
4405 | */ | |
b37ad28b | 4406 | __be32 |
1da177e4 LT |
4407 | nfs4_check_open_reclaim(clientid_t *clid) |
4408 | { | |
dfc83565 | 4409 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4410 | } |
4411 | ||
ac4d8ff2 | 4412 | /* initialization to perform at module load time: */ |
1da177e4 | 4413 | |
e8ff2a84 | 4414 | int |
ac4d8ff2 | 4415 | nfs4_state_init(void) |
1da177e4 | 4416 | { |
e8ff2a84 | 4417 | int i, status; |
1da177e4 | 4418 | |
e8ff2a84 BF |
4419 | status = nfsd4_init_slabs(); |
4420 | if (status) | |
4421 | return status; | |
1da177e4 LT |
4422 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4423 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4424 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4425 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4426 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4427 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4428 | } |
5282fd72 ME |
4429 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4430 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4431 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4432 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4433 | } | |
506f275f BF |
4434 | for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) { |
4435 | INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); | |
4436 | INIT_LIST_HEAD(&open_ownerid_hashtbl[i]); | |
1da177e4 | 4437 | } |
b79abadd | 4438 | for (i = 0; i < STATEID_HASH_SIZE; i++) |
1da177e4 | 4439 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
1da177e4 LT |
4440 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
4441 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4442 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4443 | } | |
1da177e4 | 4444 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4445 | INIT_LIST_HEAD(&close_lru); |
4446 | INIT_LIST_HEAD(&client_lru); | |
4447 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4448 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4449 | return 0; |
ac4d8ff2 N |
4450 | } |
4451 | ||
190e4fbf N |
4452 | static void |
4453 | nfsd4_load_reboot_recovery_data(void) | |
4454 | { | |
4455 | int status; | |
4456 | ||
0964a3d3 | 4457 | nfs4_lock_state(); |
48483bf2 | 4458 | nfsd4_init_recdir(); |
190e4fbf | 4459 | status = nfsd4_recdir_load(); |
0964a3d3 | 4460 | nfs4_unlock_state(); |
190e4fbf N |
4461 | if (status) |
4462 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4463 | } | |
4464 | ||
c2f1a551 MS |
4465 | /* |
4466 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4467 | * client may quite reasonably hang on to a delegation as long as it has | |
4468 | * the inode cached. This becomes an obvious problem the first time a | |
4469 | * client's inode cache approaches the size of the server's total memory. | |
4470 | * | |
4471 | * For now we avoid this problem by imposing a hard limit on the number | |
4472 | * of delegations, which varies according to the server's memory size. | |
4473 | */ | |
4474 | static void | |
4475 | set_max_delegations(void) | |
4476 | { | |
4477 | /* | |
4478 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4479 | * estimates suggest that in the worst case (where every delegation | |
4480 | * is for a different inode), a delegation could take about 1.5K, | |
4481 | * giving a worst case usage of about 6% of memory. | |
4482 | */ | |
4483 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4484 | } | |
4485 | ||
ac4d8ff2 N |
4486 | /* initialization to perform when the nfsd service is started: */ |
4487 | ||
29ab23cc | 4488 | static int |
ac4d8ff2 N |
4489 | __nfs4_state_start(void) |
4490 | { | |
b5a1a81e BF |
4491 | int ret; |
4492 | ||
1da177e4 | 4493 | boot_time = get_seconds(); |
af558e33 | 4494 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4495 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4496 | nfsd4_grace); |
b5a1a81e BF |
4497 | ret = set_callback_cred(); |
4498 | if (ret) | |
4499 | return -ENOMEM; | |
58da282b | 4500 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4501 | if (laundry_wq == NULL) |
4502 | return -ENOMEM; | |
b5a1a81e BF |
4503 | ret = nfsd4_create_callback_queue(); |
4504 | if (ret) | |
4505 | goto out_free_laundry; | |
e46b498c | 4506 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4507 | set_max_delegations(); |
b5a1a81e BF |
4508 | return 0; |
4509 | out_free_laundry: | |
4510 | destroy_workqueue(laundry_wq); | |
4511 | return ret; | |
1da177e4 LT |
4512 | } |
4513 | ||
29ab23cc | 4514 | int |
76a3550e | 4515 | nfs4_state_start(void) |
1da177e4 | 4516 | { |
190e4fbf | 4517 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4518 | return __nfs4_state_start(); |
1da177e4 LT |
4519 | } |
4520 | ||
1da177e4 LT |
4521 | static void |
4522 | __nfs4_state_shutdown(void) | |
4523 | { | |
4524 | int i; | |
4525 | struct nfs4_client *clp = NULL; | |
4526 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4527 | struct list_head *pos, *next, reaplist; |
4528 | ||
1da177e4 LT |
4529 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4530 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4531 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4532 | expire_client(clp); | |
4533 | } | |
4534 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4535 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4536 | expire_client(clp); | |
4537 | } | |
4538 | } | |
4539 | INIT_LIST_HEAD(&reaplist); | |
4540 | spin_lock(&recall_lock); | |
4541 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4542 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4543 | list_move(&dp->dl_recall_lru, &reaplist); | |
4544 | } | |
4545 | spin_unlock(&recall_lock); | |
4546 | list_for_each_safe(pos, next, &reaplist) { | |
4547 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4548 | list_del_init(&dp->dl_recall_lru); | |
4549 | unhash_delegation(dp); | |
4550 | } | |
4551 | ||
190e4fbf | 4552 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4553 | } |
4554 | ||
4555 | void | |
4556 | nfs4_state_shutdown(void) | |
4557 | { | |
afe2c511 | 4558 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4559 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4560 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4561 | nfs4_lock_state(); |
4562 | nfs4_release_reclaim(); | |
4563 | __nfs4_state_shutdown(); | |
1da177e4 | 4564 | nfs4_unlock_state(); |
c3935e30 | 4565 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4566 | } |