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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 BS |
64 | static struct nfs4_stateid * search_for_stateid(stateid_t *stid); |
65 | static struct nfs4_delegation * search_for_delegation(stateid_t *stid); | |
1da177e4 | 66 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
0964a3d3 N |
67 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
68 | static void nfs4_set_recdir(char *recdir); | |
e1ca12df | 69 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner); |
1da177e4 | 70 | |
8b671b80 BF |
71 | /* Locking: */ |
72 | ||
73 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 74 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 75 | |
8b671b80 BF |
76 | /* |
77 | * Currently used for the del_recall_lru and file hash table. In an | |
78 | * effort to decrease the scope of the client_mutex, this spinlock may | |
79 | * eventually cover more: | |
80 | */ | |
81 | static DEFINE_SPINLOCK(recall_lock); | |
82 | ||
e18b890b CL |
83 | static struct kmem_cache *stateowner_slab = NULL; |
84 | static struct kmem_cache *file_slab = NULL; | |
85 | static struct kmem_cache *stateid_slab = NULL; | |
86 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 87 | |
1da177e4 LT |
88 | void |
89 | nfs4_lock_state(void) | |
90 | { | |
353ab6e9 | 91 | mutex_lock(&client_mutex); |
1da177e4 LT |
92 | } |
93 | ||
94 | void | |
95 | nfs4_unlock_state(void) | |
96 | { | |
353ab6e9 | 97 | mutex_unlock(&client_mutex); |
1da177e4 LT |
98 | } |
99 | ||
100 | static inline u32 | |
101 | opaque_hashval(const void *ptr, int nbytes) | |
102 | { | |
103 | unsigned char *cptr = (unsigned char *) ptr; | |
104 | ||
105 | u32 x = 0; | |
106 | while (nbytes--) { | |
107 | x *= 37; | |
108 | x += *cptr++; | |
109 | } | |
110 | return x; | |
111 | } | |
112 | ||
1da177e4 LT |
113 | static struct list_head del_recall_lru; |
114 | ||
13cd2184 N |
115 | static inline void |
116 | put_nfs4_file(struct nfs4_file *fi) | |
117 | { | |
8b671b80 BF |
118 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
119 | list_del(&fi->fi_hash); | |
120 | spin_unlock(&recall_lock); | |
121 | iput(fi->fi_inode); | |
122 | kmem_cache_free(file_slab, fi); | |
123 | } | |
13cd2184 N |
124 | } |
125 | ||
126 | static inline void | |
127 | get_nfs4_file(struct nfs4_file *fi) | |
128 | { | |
8b671b80 | 129 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
130 | } |
131 | ||
ef0f3390 | 132 | static int num_delegations; |
c2f1a551 | 133 | unsigned int max_delegations; |
ef0f3390 N |
134 | |
135 | /* | |
136 | * Open owner state (share locks) | |
137 | */ | |
138 | ||
139 | /* hash tables for nfs4_stateowner */ | |
140 | #define OWNER_HASH_BITS 8 | |
141 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
142 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
143 | ||
144 | #define ownerid_hashval(id) \ | |
145 | ((id) & OWNER_HASH_MASK) | |
146 | #define ownerstr_hashval(clientid, ownername) \ | |
147 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
148 | ||
149 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
150 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
151 | ||
152 | /* hash table for nfs4_file */ | |
153 | #define FILE_HASH_BITS 8 | |
154 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 155 | |
ef0f3390 N |
156 | /* hash table for (open)nfs4_stateid */ |
157 | #define STATEID_HASH_BITS 10 | |
158 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
159 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
160 | ||
161 | #define file_hashval(x) \ | |
162 | hash_ptr(x, FILE_HASH_BITS) | |
163 | #define stateid_hashval(owner_id, file_id) \ | |
164 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
165 | ||
166 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
167 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
168 | ||
998db52c | 169 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
170 | { |
171 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
172 | atomic_inc(&fp->fi_access[oflag]); | |
173 | } | |
174 | ||
998db52c BF |
175 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
176 | { | |
177 | if (oflag == O_RDWR) { | |
178 | __nfs4_file_get_access(fp, O_RDONLY); | |
179 | __nfs4_file_get_access(fp, O_WRONLY); | |
180 | } else | |
181 | __nfs4_file_get_access(fp, oflag); | |
182 | } | |
183 | ||
184 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
185 | { |
186 | if (fp->fi_fds[oflag]) { | |
187 | fput(fp->fi_fds[oflag]); | |
188 | fp->fi_fds[oflag] = NULL; | |
189 | } | |
190 | } | |
191 | ||
998db52c | 192 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
193 | { |
194 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
195 | nfs4_file_put_fd(fp, O_RDWR); | |
196 | nfs4_file_put_fd(fp, oflag); | |
197 | } | |
198 | } | |
199 | ||
998db52c BF |
200 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
201 | { | |
202 | if (oflag == O_RDWR) { | |
203 | __nfs4_file_put_access(fp, O_RDONLY); | |
204 | __nfs4_file_put_access(fp, O_WRONLY); | |
205 | } else | |
206 | __nfs4_file_put_access(fp, oflag); | |
207 | } | |
208 | ||
1da177e4 LT |
209 | static struct nfs4_delegation * |
210 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
211 | { | |
212 | struct nfs4_delegation *dp; | |
213 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
214 | |
215 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
216 | /* |
217 | * Major work on the lease subsystem (for example, to support | |
218 | * calbacks on stat) will be required before we can support | |
219 | * write delegations properly. | |
220 | */ | |
221 | if (type != NFS4_OPEN_DELEGATE_READ) | |
222 | return NULL; | |
47f9940c MS |
223 | if (fp->fi_had_conflict) |
224 | return NULL; | |
c2f1a551 | 225 | if (num_delegations > max_delegations) |
ef0f3390 | 226 | return NULL; |
5b2d21c1 N |
227 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
228 | if (dp == NULL) | |
1da177e4 | 229 | return dp; |
ef0f3390 | 230 | num_delegations++; |
ea1da636 N |
231 | INIT_LIST_HEAD(&dp->dl_perfile); |
232 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
233 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
234 | dp->dl_client = clp; | |
13cd2184 | 235 | get_nfs4_file(fp); |
1da177e4 | 236 | dp->dl_file = fp; |
1da177e4 | 237 | dp->dl_type = type; |
e4e83ea4 | 238 | dp->dl_stateid.si_boot = boot_time; |
1da177e4 LT |
239 | dp->dl_stateid.si_stateownerid = current_delegid++; |
240 | dp->dl_stateid.si_fileid = 0; | |
241 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 242 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
243 | dp->dl_time = 0; |
244 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 245 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
246 | return dp; |
247 | } | |
248 | ||
249 | void | |
250 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
251 | { | |
252 | if (atomic_dec_and_test(&dp->dl_count)) { | |
253 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 254 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 255 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 256 | num_delegations--; |
1da177e4 LT |
257 | } |
258 | } | |
259 | ||
acfdf5c3 | 260 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 261 | { |
acfdf5c3 BF |
262 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
263 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
264 | fp->fi_lease = NULL; | |
4ee63624 | 265 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
266 | fp->fi_deleg_file = NULL; |
267 | } | |
1da177e4 LT |
268 | } |
269 | ||
270 | /* Called under the state lock. */ | |
271 | static void | |
272 | unhash_delegation(struct nfs4_delegation *dp) | |
273 | { | |
ea1da636 | 274 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 275 | spin_lock(&recall_lock); |
5d926e8c | 276 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
277 | list_del_init(&dp->dl_recall_lru); |
278 | spin_unlock(&recall_lock); | |
acfdf5c3 | 279 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
280 | nfs4_put_delegation(dp); |
281 | } | |
282 | ||
283 | /* | |
284 | * SETCLIENTID state | |
285 | */ | |
286 | ||
36acb66b | 287 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
288 | static DEFINE_SPINLOCK(client_lock); |
289 | ||
1da177e4 LT |
290 | /* Hash tables for nfs4_clientid state */ |
291 | #define CLIENT_HASH_BITS 4 | |
292 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
293 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
294 | ||
295 | #define clientid_hashval(id) \ | |
296 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
297 | #define clientstr_hashval(name) \ |
298 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
299 | /* |
300 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
301 | * used in reboot/reset lease grace period processing | |
302 | * | |
303 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
304 | * setclientid_confirmed info. | |
305 | * | |
306 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
307 | * setclientid info. | |
308 | * | |
309 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
310 | * for lease renewal. | |
311 | * | |
312 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
313 | * for last close replay. | |
314 | */ | |
315 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
316 | static int reclaim_str_hashtbl_size = 0; | |
317 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
318 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
319 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
320 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
321 | static struct list_head client_lru; | |
322 | static struct list_head close_lru; | |
323 | ||
f9d7562f BF |
324 | /* |
325 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
326 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
327 | * only what share bits are currently in force, but also what | |
328 | * combinations of share bits previous opens have used. This allows us | |
329 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
330 | * return an error if the client attempt to downgrade to a combination | |
331 | * of share bits not explicable by closing some of its previous opens. | |
332 | * | |
333 | * XXX: This enforcement is actually incomplete, since we don't keep | |
334 | * track of access/deny bit combinations; so, e.g., we allow: | |
335 | * | |
336 | * OPEN allow read, deny write | |
337 | * OPEN allow both, deny none | |
338 | * DOWNGRADE allow read, deny none | |
339 | * | |
340 | * which we should reject. | |
341 | */ | |
342 | static void | |
343 | set_access(unsigned int *access, unsigned long bmap) { | |
344 | int i; | |
345 | ||
346 | *access = 0; | |
347 | for (i = 1; i < 4; i++) { | |
348 | if (test_bit(i, &bmap)) | |
349 | *access |= i; | |
350 | } | |
351 | } | |
352 | ||
353 | static void | |
354 | set_deny(unsigned int *deny, unsigned long bmap) { | |
355 | int i; | |
356 | ||
357 | *deny = 0; | |
358 | for (i = 0; i < 4; i++) { | |
359 | if (test_bit(i, &bmap)) | |
360 | *deny |= i ; | |
361 | } | |
362 | } | |
363 | ||
364 | static int | |
365 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
366 | unsigned int access, deny; | |
367 | ||
368 | set_access(&access, stp->st_access_bmap); | |
369 | set_deny(&deny, stp->st_deny_bmap); | |
370 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
371 | return 0; | |
372 | return 1; | |
373 | } | |
374 | ||
375 | static int nfs4_access_to_omode(u32 access) | |
376 | { | |
8f34a430 | 377 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
378 | case NFS4_SHARE_ACCESS_READ: |
379 | return O_RDONLY; | |
380 | case NFS4_SHARE_ACCESS_WRITE: | |
381 | return O_WRONLY; | |
382 | case NFS4_SHARE_ACCESS_BOTH: | |
383 | return O_RDWR; | |
384 | } | |
385 | BUG(); | |
386 | } | |
387 | ||
529d7b2a BF |
388 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
389 | { | |
390 | list_del(&stp->st_hash); | |
391 | list_del(&stp->st_perfile); | |
392 | list_del(&stp->st_perstateowner); | |
393 | } | |
394 | ||
395 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
396 | { | |
499f3edc | 397 | int i; |
0997b173 | 398 | |
23fcf2ec | 399 | if (stp->st_access_bmap) { |
499f3edc BF |
400 | for (i = 1; i < 4; i++) { |
401 | if (test_bit(i, &stp->st_access_bmap)) | |
402 | nfs4_file_put_access(stp->st_file, | |
403 | nfs4_access_to_omode(i)); | |
404 | } | |
23fcf2ec | 405 | } |
a96e5b90 | 406 | put_nfs4_file(stp->st_file); |
529d7b2a BF |
407 | kmem_cache_free(stateid_slab, stp); |
408 | } | |
409 | ||
410 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
411 | { | |
412 | struct file *file; | |
413 | ||
414 | unhash_generic_stateid(stp); | |
415 | file = find_any_file(stp->st_file); | |
416 | if (file) | |
417 | locks_remove_posix(file, (fl_owner_t)stp->st_stateowner); | |
418 | free_generic_stateid(stp); | |
419 | } | |
420 | ||
421 | static void unhash_lockowner(struct nfs4_stateowner *sop) | |
422 | { | |
423 | struct nfs4_stateid *stp; | |
424 | ||
425 | list_del(&sop->so_idhash); | |
426 | list_del(&sop->so_strhash); | |
427 | list_del(&sop->so_perstateid); | |
428 | while (!list_empty(&sop->so_stateids)) { | |
429 | stp = list_first_entry(&sop->so_stateids, | |
430 | struct nfs4_stateid, st_perstateowner); | |
431 | release_lock_stateid(stp); | |
432 | } | |
433 | } | |
434 | ||
435 | static void release_lockowner(struct nfs4_stateowner *sop) | |
436 | { | |
437 | unhash_lockowner(sop); | |
438 | nfs4_put_stateowner(sop); | |
439 | } | |
440 | ||
441 | static void | |
442 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
443 | { | |
444 | struct nfs4_stateowner *lock_sop; | |
445 | ||
446 | while (!list_empty(&open_stp->st_lockowners)) { | |
447 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
448 | struct nfs4_stateowner, so_perstateid); | |
449 | /* list_del(&open_stp->st_lockowners); */ | |
450 | BUG_ON(lock_sop->so_is_open_owner); | |
451 | release_lockowner(lock_sop); | |
452 | } | |
453 | } | |
454 | ||
2283963f BF |
455 | static void release_open_stateid(struct nfs4_stateid *stp) |
456 | { | |
457 | unhash_generic_stateid(stp); | |
458 | release_stateid_lockowners(stp); | |
2283963f BF |
459 | free_generic_stateid(stp); |
460 | } | |
461 | ||
f044ff83 | 462 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
463 | { |
464 | struct nfs4_stateid *stp; | |
465 | ||
466 | list_del(&sop->so_idhash); | |
467 | list_del(&sop->so_strhash); | |
f044ff83 BF |
468 | list_del(&sop->so_perclient); |
469 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 470 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
471 | stp = list_first_entry(&sop->so_stateids, |
472 | struct nfs4_stateid, st_perstateowner); | |
473 | release_open_stateid(stp); | |
f1d110ca BF |
474 | } |
475 | } | |
476 | ||
f044ff83 | 477 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 478 | { |
f044ff83 | 479 | unhash_openowner(sop); |
f1d110ca BF |
480 | list_del(&sop->so_close_lru); |
481 | nfs4_put_stateowner(sop); | |
482 | } | |
483 | ||
5282fd72 ME |
484 | #define SESSION_HASH_SIZE 512 |
485 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
486 | ||
487 | static inline int | |
488 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
489 | { | |
490 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
491 | ||
492 | return sid->sequence % SESSION_HASH_SIZE; | |
493 | } | |
494 | ||
495 | static inline void | |
496 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
497 | { | |
498 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
499 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
500 | } | |
501 | ||
ec6b5d7b AA |
502 | static void |
503 | gen_sessionid(struct nfsd4_session *ses) | |
504 | { | |
505 | struct nfs4_client *clp = ses->se_client; | |
506 | struct nfsd4_sessionid *sid; | |
507 | ||
508 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
509 | sid->clientid = clp->cl_clientid; | |
510 | sid->sequence = current_sessionid++; | |
511 | sid->reserved = 0; | |
512 | } | |
513 | ||
514 | /* | |
a649637c AA |
515 | * The protocol defines ca_maxresponssize_cached to include the size of |
516 | * the rpc header, but all we need to cache is the data starting after | |
517 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
518 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
519 | * value that is the number of bytes in our cache plus a few additional | |
520 | * bytes. In order to stay on the safe side, and not promise more than | |
521 | * we can cache, those additional bytes must be the minimum possible: 24 | |
522 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
523 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
524 | * for the SEQUENCE op response: | |
525 | */ | |
526 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
527 | ||
557ce264 AA |
528 | static void |
529 | free_session_slots(struct nfsd4_session *ses) | |
530 | { | |
531 | int i; | |
532 | ||
533 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
534 | kfree(ses->se_slots[i]); | |
535 | } | |
536 | ||
a649637c | 537 | /* |
efe0cb6d BF |
538 | * We don't actually need to cache the rpc and session headers, so we |
539 | * can allocate a little less for each slot: | |
540 | */ | |
541 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
542 | { | |
543 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
544 | } | |
545 | ||
5b6feee9 | 546 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 547 | { |
5b6feee9 BF |
548 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
549 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 550 | |
5b6feee9 BF |
551 | return size; |
552 | } | |
ec6b5d7b | 553 | |
5b6feee9 BF |
554 | /* |
555 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
556 | * re-negotiate active sessions and reduce their slot usage to make |
557 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 558 | */ |
5b6feee9 | 559 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 560 | { |
5b6feee9 | 561 | int avail; |
ec6b5d7b | 562 | |
5b6feee9 | 563 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 564 | |
5b6feee9 BF |
565 | spin_lock(&nfsd_drc_lock); |
566 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
567 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
568 | num = min_t(int, num, avail / slotsize); | |
569 | nfsd_drc_mem_used += num * slotsize; | |
570 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 571 | |
5b6feee9 BF |
572 | return num; |
573 | } | |
ec6b5d7b | 574 | |
5b6feee9 BF |
575 | static void nfsd4_put_drc_mem(int slotsize, int num) |
576 | { | |
4bd9b0f4 | 577 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 578 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 579 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 580 | } |
ec6b5d7b | 581 | |
5b6feee9 BF |
582 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
583 | { | |
584 | struct nfsd4_session *new; | |
585 | int mem, i; | |
a649637c | 586 | |
5b6feee9 BF |
587 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
588 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
589 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 590 | |
5b6feee9 BF |
591 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
592 | if (!new) | |
593 | return NULL; | |
557ce264 | 594 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
595 | for (i = 0; i < numslots; i++) { |
596 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
597 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
598 | if (!new->se_slots[i]) | |
557ce264 | 599 | goto out_free; |
557ce264 | 600 | } |
5b6feee9 BF |
601 | return new; |
602 | out_free: | |
603 | while (i--) | |
604 | kfree(new->se_slots[i]); | |
605 | kfree(new); | |
606 | return NULL; | |
ec6b5d7b AA |
607 | } |
608 | ||
5b6feee9 | 609 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 610 | { |
5b6feee9 | 611 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 612 | |
5b6feee9 | 613 | new->maxreqs = numslots; |
d2b21743 MJ |
614 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
615 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
616 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
617 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
618 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
619 | } | |
ec6b5d7b | 620 | |
19cf5c02 BF |
621 | static void free_conn(struct nfsd4_conn *c) |
622 | { | |
623 | svc_xprt_put(c->cn_xprt); | |
624 | kfree(c); | |
625 | } | |
ec6b5d7b | 626 | |
19cf5c02 BF |
627 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
628 | { | |
629 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
630 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 631 | |
19cf5c02 BF |
632 | spin_lock(&clp->cl_lock); |
633 | if (!list_empty(&c->cn_persession)) { | |
634 | list_del(&c->cn_persession); | |
635 | free_conn(c); | |
636 | } | |
637 | spin_unlock(&clp->cl_lock); | |
eea49806 | 638 | nfsd4_probe_callback(clp); |
19cf5c02 | 639 | } |
ec6b5d7b | 640 | |
d29c374c | 641 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 642 | { |
c7662518 | 643 | struct nfsd4_conn *conn; |
ec6b5d7b | 644 | |
c7662518 BF |
645 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
646 | if (!conn) | |
db90681d | 647 | return NULL; |
c7662518 BF |
648 | svc_xprt_get(rqstp->rq_xprt); |
649 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 650 | conn->cn_flags = flags; |
db90681d BF |
651 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
652 | return conn; | |
653 | } | |
a649637c | 654 | |
328ead28 BF |
655 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
656 | { | |
657 | conn->cn_session = ses; | |
658 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
659 | } |
660 | ||
db90681d | 661 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 662 | { |
db90681d | 663 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 664 | |
c7662518 | 665 | spin_lock(&clp->cl_lock); |
328ead28 | 666 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 667 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
668 | } |
669 | ||
21b75b01 | 670 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 671 | { |
19cf5c02 | 672 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 673 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
674 | } |
675 | ||
1d1bc8f2 | 676 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 677 | { |
db90681d | 678 | struct nfsd4_conn *conn; |
21b75b01 | 679 | int ret; |
ec6b5d7b | 680 | |
1d1bc8f2 | 681 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
682 | if (!conn) |
683 | return nfserr_jukebox; | |
684 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
685 | ret = nfsd4_register_conn(conn); |
686 | if (ret) | |
687 | /* oops; xprt is already down: */ | |
688 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
689 | return nfs_ok; |
690 | } | |
ec6b5d7b | 691 | |
1d1bc8f2 BF |
692 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
693 | { | |
694 | u32 dir = NFS4_CDFC4_FORE; | |
695 | ||
696 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
697 | dir |= NFS4_CDFC4_BACK; | |
698 | ||
699 | return nfsd4_new_conn(rqstp, ses, dir); | |
700 | } | |
701 | ||
702 | /* must be called under client_lock */ | |
19cf5c02 | 703 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 704 | { |
19cf5c02 BF |
705 | struct nfs4_client *clp = s->se_client; |
706 | struct nfsd4_conn *c; | |
ec6b5d7b | 707 | |
19cf5c02 BF |
708 | spin_lock(&clp->cl_lock); |
709 | while (!list_empty(&s->se_conns)) { | |
710 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
711 | list_del_init(&c->cn_persession); | |
712 | spin_unlock(&clp->cl_lock); | |
557ce264 | 713 | |
19cf5c02 BF |
714 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
715 | free_conn(c); | |
ec6b5d7b | 716 | |
19cf5c02 BF |
717 | spin_lock(&clp->cl_lock); |
718 | } | |
719 | spin_unlock(&clp->cl_lock); | |
c7662518 | 720 | } |
ec6b5d7b | 721 | |
c7662518 BF |
722 | void free_session(struct kref *kref) |
723 | { | |
724 | struct nfsd4_session *ses; | |
725 | int mem; | |
726 | ||
727 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 728 | nfsd4_del_conns(ses); |
c7662518 BF |
729 | spin_lock(&nfsd_drc_lock); |
730 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
731 | nfsd_drc_mem_used -= mem; | |
732 | spin_unlock(&nfsd_drc_lock); | |
733 | free_session_slots(ses); | |
734 | kfree(ses); | |
735 | } | |
736 | ||
ac7c46f2 | 737 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
738 | { |
739 | struct nfsd4_session *new; | |
740 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
741 | int numslots, slotsize; | |
c7662518 | 742 | int status; |
5b6feee9 BF |
743 | int idx; |
744 | ||
745 | /* | |
746 | * Note decreasing slot size below client's request may | |
747 | * make it difficult for client to function correctly, whereas | |
748 | * decreasing the number of slots will (just?) affect | |
749 | * performance. When short on memory we therefore prefer to | |
750 | * decrease number of slots instead of their size. | |
751 | */ | |
752 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
753 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
754 | if (numslots < 1) |
755 | return NULL; | |
5b6feee9 BF |
756 | |
757 | new = alloc_session(slotsize, numslots); | |
758 | if (!new) { | |
759 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 760 | return NULL; |
557ce264 | 761 | } |
5b6feee9 | 762 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 763 | |
ec6b5d7b AA |
764 | new->se_client = clp; |
765 | gen_sessionid(new); | |
ec6b5d7b | 766 | |
c7662518 BF |
767 | INIT_LIST_HEAD(&new->se_conns); |
768 | ||
ac7c46f2 | 769 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 770 | new->se_flags = cses->flags; |
8b5ce5cd | 771 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 772 | kref_init(&new->se_ref); |
5b6feee9 | 773 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 774 | spin_lock(&client_lock); |
ec6b5d7b | 775 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 776 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 777 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 778 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 779 | spin_unlock(&client_lock); |
ec6b5d7b | 780 | |
1d1bc8f2 | 781 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 782 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
783 | if (status) { |
784 | free_session(&new->se_ref); | |
ac7c46f2 | 785 | return NULL; |
c7662518 | 786 | } |
dcbeaa68 | 787 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 788 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
789 | /* |
790 | * This is a little silly; with sessions there's no real | |
791 | * use for the callback address. Use the peer address | |
792 | * as a reasonable default for now, but consider fixing | |
793 | * the rpc client not to require an address in the | |
794 | * future: | |
795 | */ | |
edd76786 BF |
796 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
797 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 798 | } |
dcbeaa68 | 799 | nfsd4_probe_callback(clp); |
ac7c46f2 | 800 | return new; |
ec6b5d7b AA |
801 | } |
802 | ||
9089f1b4 | 803 | /* caller must hold client_lock */ |
5282fd72 ME |
804 | static struct nfsd4_session * |
805 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
806 | { | |
807 | struct nfsd4_session *elem; | |
808 | int idx; | |
809 | ||
810 | dump_sessionid(__func__, sessionid); | |
811 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
812 | /* Search in the appropriate list */ |
813 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
814 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
815 | NFS4_MAX_SESSIONID_LEN)) { | |
816 | return elem; | |
817 | } | |
818 | } | |
819 | ||
820 | dprintk("%s: session not found\n", __func__); | |
821 | return NULL; | |
822 | } | |
823 | ||
9089f1b4 | 824 | /* caller must hold client_lock */ |
7116ed6b | 825 | static void |
5282fd72 | 826 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
827 | { |
828 | list_del(&ses->se_hash); | |
4c649378 | 829 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 830 | list_del(&ses->se_perclnt); |
4c649378 | 831 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
832 | } |
833 | ||
36acb66b | 834 | /* must be called under the client_lock */ |
1da177e4 | 835 | static inline void |
36acb66b | 836 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 837 | { |
07cd4909 BH |
838 | if (is_client_expired(clp)) { |
839 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
840 | __func__, | |
841 | clp->cl_clientid.cl_boot, | |
842 | clp->cl_clientid.cl_id); | |
843 | return; | |
844 | } | |
845 | ||
1da177e4 LT |
846 | /* |
847 | * Move client to the end to the LRU list. | |
848 | */ | |
849 | dprintk("renewing client (clientid %08x/%08x)\n", | |
850 | clp->cl_clientid.cl_boot, | |
851 | clp->cl_clientid.cl_id); | |
852 | list_move_tail(&clp->cl_lru, &client_lru); | |
853 | clp->cl_time = get_seconds(); | |
854 | } | |
855 | ||
36acb66b BH |
856 | static inline void |
857 | renew_client(struct nfs4_client *clp) | |
858 | { | |
859 | spin_lock(&client_lock); | |
860 | renew_client_locked(clp); | |
861 | spin_unlock(&client_lock); | |
862 | } | |
863 | ||
1da177e4 LT |
864 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
865 | static int | |
866 | STALE_CLIENTID(clientid_t *clid) | |
867 | { | |
868 | if (clid->cl_boot == boot_time) | |
869 | return 0; | |
60adfc50 AA |
870 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
871 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
872 | return 1; |
873 | } | |
874 | ||
875 | /* | |
876 | * XXX Should we use a slab cache ? | |
877 | * This type of memory management is somewhat inefficient, but we use it | |
878 | * anyway since SETCLIENTID is not a common operation. | |
879 | */ | |
35bba9a3 | 880 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
881 | { |
882 | struct nfs4_client *clp; | |
883 | ||
35bba9a3 BF |
884 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
885 | if (clp == NULL) | |
886 | return NULL; | |
887 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
888 | if (clp->cl_name.data == NULL) { | |
889 | kfree(clp); | |
890 | return NULL; | |
1da177e4 | 891 | } |
35bba9a3 BF |
892 | memcpy(clp->cl_name.data, name.data, name.len); |
893 | clp->cl_name.len = name.len; | |
1da177e4 LT |
894 | return clp; |
895 | } | |
896 | ||
897 | static inline void | |
898 | free_client(struct nfs4_client *clp) | |
899 | { | |
792c95dd BF |
900 | while (!list_empty(&clp->cl_sessions)) { |
901 | struct nfsd4_session *ses; | |
902 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
903 | se_perclnt); | |
904 | list_del(&ses->se_perclnt); | |
905 | nfsd4_put_session(ses); | |
906 | } | |
1da177e4 LT |
907 | if (clp->cl_cred.cr_group_info) |
908 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 909 | kfree(clp->cl_principal); |
1da177e4 LT |
910 | kfree(clp->cl_name.data); |
911 | kfree(clp); | |
912 | } | |
913 | ||
d7682988 BH |
914 | void |
915 | release_session_client(struct nfsd4_session *session) | |
916 | { | |
917 | struct nfs4_client *clp = session->se_client; | |
918 | ||
919 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
920 | return; | |
921 | if (is_client_expired(clp)) { | |
922 | free_client(clp); | |
923 | session->se_client = NULL; | |
924 | } else | |
925 | renew_client_locked(clp); | |
926 | spin_unlock(&client_lock); | |
d7682988 BH |
927 | } |
928 | ||
84d38ac9 BH |
929 | /* must be called under the client_lock */ |
930 | static inline void | |
931 | unhash_client_locked(struct nfs4_client *clp) | |
932 | { | |
792c95dd BF |
933 | struct nfsd4_session *ses; |
934 | ||
07cd4909 | 935 | mark_client_expired(clp); |
84d38ac9 | 936 | list_del(&clp->cl_lru); |
4c649378 | 937 | spin_lock(&clp->cl_lock); |
792c95dd BF |
938 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
939 | list_del_init(&ses->se_hash); | |
4c649378 | 940 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
941 | } |
942 | ||
1da177e4 LT |
943 | static void |
944 | expire_client(struct nfs4_client *clp) | |
945 | { | |
946 | struct nfs4_stateowner *sop; | |
947 | struct nfs4_delegation *dp; | |
1da177e4 LT |
948 | struct list_head reaplist; |
949 | ||
1da177e4 LT |
950 | INIT_LIST_HEAD(&reaplist); |
951 | spin_lock(&recall_lock); | |
ea1da636 N |
952 | while (!list_empty(&clp->cl_delegations)) { |
953 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 954 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
955 | list_move(&dp->dl_recall_lru, &reaplist); |
956 | } | |
957 | spin_unlock(&recall_lock); | |
958 | while (!list_empty(&reaplist)) { | |
959 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
960 | list_del_init(&dp->dl_recall_lru); | |
961 | unhash_delegation(dp); | |
962 | } | |
ea1da636 N |
963 | while (!list_empty(&clp->cl_openowners)) { |
964 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 965 | release_openowner(sop); |
1da177e4 | 966 | } |
6ff8da08 | 967 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
968 | if (clp->cl_cb_conn.cb_xprt) |
969 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
970 | list_del(&clp->cl_idhash); |
971 | list_del(&clp->cl_strhash); | |
be1fdf6c | 972 | spin_lock(&client_lock); |
84d38ac9 | 973 | unhash_client_locked(clp); |
46583e25 BH |
974 | if (atomic_read(&clp->cl_refcount) == 0) |
975 | free_client(clp); | |
be1fdf6c | 976 | spin_unlock(&client_lock); |
1da177e4 LT |
977 | } |
978 | ||
35bba9a3 BF |
979 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
980 | { | |
981 | memcpy(target->cl_verifier.data, source->data, | |
982 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
983 | } |
984 | ||
35bba9a3 BF |
985 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
986 | { | |
1da177e4 LT |
987 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
988 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
989 | } | |
990 | ||
35bba9a3 BF |
991 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
992 | { | |
1da177e4 LT |
993 | target->cr_uid = source->cr_uid; |
994 | target->cr_gid = source->cr_gid; | |
995 | target->cr_group_info = source->cr_group_info; | |
996 | get_group_info(target->cr_group_info); | |
997 | } | |
998 | ||
35bba9a3 | 999 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1000 | { |
a55370a3 | 1001 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1002 | } |
1003 | ||
1004 | static int | |
599e0a22 BF |
1005 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1006 | { | |
1007 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1008 | } |
1009 | ||
1010 | static int | |
599e0a22 BF |
1011 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1012 | { | |
1013 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1014 | } |
1015 | ||
1016 | /* XXX what about NGROUP */ | |
1017 | static int | |
599e0a22 BF |
1018 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1019 | { | |
1020 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1021 | } |
1022 | ||
5ec7b46c BF |
1023 | static void gen_clid(struct nfs4_client *clp) |
1024 | { | |
1025 | static u32 current_clientid = 1; | |
1026 | ||
1da177e4 LT |
1027 | clp->cl_clientid.cl_boot = boot_time; |
1028 | clp->cl_clientid.cl_id = current_clientid++; | |
1029 | } | |
1030 | ||
deda2faa BF |
1031 | static void gen_confirm(struct nfs4_client *clp) |
1032 | { | |
1033 | static u32 i; | |
1034 | u32 *p; | |
1da177e4 | 1035 | |
1da177e4 | 1036 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1037 | *p++ = get_seconds(); |
1038 | *p++ = i++; | |
1da177e4 LT |
1039 | } |
1040 | ||
b09333c4 RL |
1041 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1042 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1043 | { | |
1044 | struct nfs4_client *clp; | |
1045 | struct sockaddr *sa = svc_addr(rqstp); | |
1046 | char *princ; | |
1047 | ||
1048 | clp = alloc_client(name); | |
1049 | if (clp == NULL) | |
1050 | return NULL; | |
1051 | ||
792c95dd BF |
1052 | INIT_LIST_HEAD(&clp->cl_sessions); |
1053 | ||
b09333c4 RL |
1054 | princ = svc_gss_principal(rqstp); |
1055 | if (princ) { | |
1056 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1057 | if (clp->cl_principal == NULL) { | |
1058 | free_client(clp); | |
1059 | return NULL; | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 1064 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1065 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1066 | INIT_LIST_HEAD(&clp->cl_idhash); |
1067 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1068 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1069 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1070 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1071 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1072 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1073 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1074 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1075 | clear_bit(0, &clp->cl_cb_slot_busy); |
1076 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1077 | copy_verf(clp, verf); | |
1078 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1079 | clp->cl_flavor = rqstp->rq_flavor; | |
1080 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1081 | gen_confirm(clp); | |
edd76786 | 1082 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1083 | return clp; |
1084 | } | |
1085 | ||
35bba9a3 BF |
1086 | static int check_name(struct xdr_netobj name) |
1087 | { | |
1da177e4 LT |
1088 | if (name.len == 0) |
1089 | return 0; | |
1090 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 1091 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
1092 | return 0; |
1093 | } | |
1094 | return 1; | |
1095 | } | |
1096 | ||
fd39ca9a | 1097 | static void |
1da177e4 LT |
1098 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1099 | { | |
1100 | unsigned int idhashval; | |
1101 | ||
1102 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1103 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1104 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1105 | renew_client(clp); |
1da177e4 LT |
1106 | } |
1107 | ||
fd39ca9a | 1108 | static void |
1da177e4 LT |
1109 | move_to_confirmed(struct nfs4_client *clp) |
1110 | { | |
1111 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1112 | unsigned int strhashval; | |
1113 | ||
1114 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1115 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1116 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1117 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1118 | renew_client(clp); |
1119 | } | |
1120 | ||
1121 | static struct nfs4_client * | |
1122 | find_confirmed_client(clientid_t *clid) | |
1123 | { | |
1124 | struct nfs4_client *clp; | |
1125 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1126 | ||
1127 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1128 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1129 | return clp; |
1130 | } | |
1131 | return NULL; | |
1132 | } | |
1133 | ||
1134 | static struct nfs4_client * | |
1135 | find_unconfirmed_client(clientid_t *clid) | |
1136 | { | |
1137 | struct nfs4_client *clp; | |
1138 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1139 | ||
1140 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1141 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1142 | return clp; |
1143 | } | |
1144 | return NULL; | |
1145 | } | |
1146 | ||
6e5f15c9 | 1147 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1148 | { |
6e5f15c9 | 1149 | return clp->cl_exchange_flags != 0; |
e203d506 | 1150 | } |
a1bcecd2 | 1151 | |
28ce6054 | 1152 | static struct nfs4_client * |
e203d506 | 1153 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1154 | { |
1155 | struct nfs4_client *clp; | |
1156 | ||
1157 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1158 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1159 | return clp; |
1160 | } | |
1161 | return NULL; | |
1162 | } | |
1163 | ||
1164 | static struct nfs4_client * | |
e203d506 | 1165 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1166 | { |
1167 | struct nfs4_client *clp; | |
1168 | ||
1169 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1170 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1171 | return clp; |
1172 | } | |
1173 | return NULL; | |
1174 | } | |
1175 | ||
6f3d772f TU |
1176 | static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) |
1177 | { | |
1178 | switch (family) { | |
1179 | case AF_INET: | |
1180 | ((struct sockaddr_in *)sa)->sin_family = AF_INET; | |
1181 | ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; | |
1182 | return; | |
1183 | case AF_INET6: | |
1184 | ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; | |
1185 | ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; | |
1186 | return; | |
1187 | } | |
1188 | } | |
1189 | ||
fd39ca9a | 1190 | static void |
6f3d772f | 1191 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1192 | { |
07263f1e | 1193 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1194 | struct sockaddr *sa = svc_addr(rqstp); |
1195 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1196 | unsigned short expected_family; |
1197 | ||
1198 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1199 | if (se->se_callback_netid_len == 3 && | |
1200 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1201 | expected_family = AF_INET; | |
1202 | else if (se->se_callback_netid_len == 4 && | |
1203 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1204 | expected_family = AF_INET6; | |
1205 | else | |
1da177e4 LT |
1206 | goto out_err; |
1207 | ||
07263f1e | 1208 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1209 | se->se_callback_addr_len, |
07263f1e BF |
1210 | (struct sockaddr *)&conn->cb_addr, |
1211 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1212 | |
07263f1e | 1213 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1214 | goto out_err; |
aa9a4ec7 | 1215 | |
07263f1e BF |
1216 | if (conn->cb_addr.ss_family == AF_INET6) |
1217 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1218 | |
07263f1e BF |
1219 | conn->cb_prog = se->se_callback_prog; |
1220 | conn->cb_ident = se->se_callback_ident; | |
6f3d772f | 1221 | rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); |
1da177e4 LT |
1222 | return; |
1223 | out_err: | |
07263f1e BF |
1224 | conn->cb_addr.ss_family = AF_UNSPEC; |
1225 | conn->cb_addrlen = 0; | |
849823c5 | 1226 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1227 | "will not receive delegations\n", |
1228 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1229 | ||
1da177e4 LT |
1230 | return; |
1231 | } | |
1232 | ||
074fe897 | 1233 | /* |
557ce264 | 1234 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1235 | */ |
074fe897 AA |
1236 | void |
1237 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1238 | { |
557ce264 AA |
1239 | struct nfsd4_slot *slot = resp->cstate.slot; |
1240 | unsigned int base; | |
074fe897 | 1241 | |
557ce264 | 1242 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1243 | |
557ce264 AA |
1244 | slot->sl_opcnt = resp->opcnt; |
1245 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1246 | |
bf864a31 | 1247 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1248 | slot->sl_datalen = 0; |
bf864a31 | 1249 | return; |
074fe897 | 1250 | } |
557ce264 AA |
1251 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1252 | base = (char *)resp->cstate.datap - | |
1253 | (char *)resp->xbuf->head[0].iov_base; | |
1254 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1255 | slot->sl_datalen)) | |
1256 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1257 | return; | |
074fe897 AA |
1258 | } |
1259 | ||
1260 | /* | |
abfabf8c AA |
1261 | * Encode the replay sequence operation from the slot values. |
1262 | * If cachethis is FALSE encode the uncached rep error on the next | |
1263 | * operation which sets resp->p and increments resp->opcnt for | |
1264 | * nfs4svc_encode_compoundres. | |
074fe897 | 1265 | * |
074fe897 | 1266 | */ |
abfabf8c AA |
1267 | static __be32 |
1268 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1269 | struct nfsd4_compoundres *resp) | |
074fe897 | 1270 | { |
abfabf8c AA |
1271 | struct nfsd4_op *op; |
1272 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1273 | |
abfabf8c | 1274 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1275 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1276 | |
abfabf8c AA |
1277 | /* Encode the replayed sequence operation */ |
1278 | op = &args->ops[resp->opcnt - 1]; | |
1279 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1280 | |
abfabf8c | 1281 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1282 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1283 | op = &args->ops[resp->opcnt++]; |
1284 | op->status = nfserr_retry_uncached_rep; | |
1285 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1286 | } |
abfabf8c | 1287 | return op->status; |
074fe897 AA |
1288 | } |
1289 | ||
1290 | /* | |
557ce264 AA |
1291 | * The sequence operation is not cached because we can use the slot and |
1292 | * session values. | |
074fe897 AA |
1293 | */ |
1294 | __be32 | |
bf864a31 AA |
1295 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1296 | struct nfsd4_sequence *seq) | |
074fe897 | 1297 | { |
557ce264 | 1298 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1299 | __be32 status; |
1300 | ||
557ce264 | 1301 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1302 | |
abfabf8c AA |
1303 | /* Either returns 0 or nfserr_retry_uncached */ |
1304 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1305 | if (status == nfserr_retry_uncached_rep) | |
1306 | return status; | |
074fe897 | 1307 | |
557ce264 AA |
1308 | /* The sequence operation has been encoded, cstate->datap set. */ |
1309 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1310 | |
557ce264 AA |
1311 | resp->opcnt = slot->sl_opcnt; |
1312 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1313 | status = slot->sl_status; | |
074fe897 AA |
1314 | |
1315 | return status; | |
1316 | } | |
1317 | ||
0733d213 AA |
1318 | /* |
1319 | * Set the exchange_id flags returned by the server. | |
1320 | */ | |
1321 | static void | |
1322 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1323 | { | |
1324 | /* pNFS is not supported */ | |
1325 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1326 | ||
1327 | /* Referrals are supported, Migration is not. */ | |
1328 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1329 | ||
1330 | /* set the wire flags to return to client. */ | |
1331 | clid->flags = new->cl_exchange_flags; | |
1332 | } | |
1333 | ||
069b6ad4 AA |
1334 | __be32 |
1335 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1336 | struct nfsd4_compound_state *cstate, | |
1337 | struct nfsd4_exchange_id *exid) | |
1338 | { | |
0733d213 AA |
1339 | struct nfs4_client *unconf, *conf, *new; |
1340 | int status; | |
1341 | unsigned int strhashval; | |
1342 | char dname[HEXDIR_LEN]; | |
363168b4 | 1343 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1344 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1345 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1346 | |
363168b4 | 1347 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1348 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1349 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1350 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1351 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1352 | |
1353 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1354 | return nfserr_inval; | |
1355 | ||
1356 | /* Currently only support SP4_NONE */ | |
1357 | switch (exid->spa_how) { | |
1358 | case SP4_NONE: | |
1359 | break; | |
1360 | case SP4_SSV: | |
044bc1d4 | 1361 | return nfserr_serverfault; |
0733d213 AA |
1362 | default: |
1363 | BUG(); /* checked by xdr code */ | |
1364 | case SP4_MACH_CRED: | |
1365 | return nfserr_serverfault; /* no excuse :-/ */ | |
1366 | } | |
1367 | ||
1368 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1369 | ||
1370 | if (status) | |
1371 | goto error; | |
1372 | ||
1373 | strhashval = clientstr_hashval(dname); | |
1374 | ||
1375 | nfs4_lock_state(); | |
1376 | status = nfs_ok; | |
1377 | ||
e203d506 | 1378 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1379 | if (conf) { |
e203d506 BF |
1380 | if (!clp_used_exchangeid(conf)) { |
1381 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1382 | goto out; | |
1383 | } | |
0733d213 AA |
1384 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1385 | /* 18.35.4 case 8 */ | |
1386 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1387 | status = nfserr_not_same; | |
1388 | goto out; | |
1389 | } | |
1390 | /* Client reboot: destroy old state */ | |
1391 | expire_client(conf); | |
1392 | goto out_new; | |
1393 | } | |
1394 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1395 | /* 18.35.4 case 9 */ | |
1396 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1397 | status = nfserr_perm; | |
1398 | goto out; | |
1399 | } | |
1400 | expire_client(conf); | |
1401 | goto out_new; | |
1402 | } | |
0733d213 AA |
1403 | /* |
1404 | * Set bit when the owner id and verifier map to an already | |
1405 | * confirmed client id (18.35.3). | |
1406 | */ | |
1407 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1408 | ||
1409 | /* | |
1410 | * Falling into 18.35.4 case 2, possible router replay. | |
1411 | * Leave confirmed record intact and return same result. | |
1412 | */ | |
1413 | copy_verf(conf, &verf); | |
1414 | new = conf; | |
1415 | goto out_copy; | |
6ddbbbfe MS |
1416 | } |
1417 | ||
1418 | /* 18.35.4 case 7 */ | |
1419 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1420 | status = nfserr_noent; | |
1421 | goto out; | |
0733d213 AA |
1422 | } |
1423 | ||
e203d506 | 1424 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1425 | if (unconf) { |
1426 | /* | |
1427 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1428 | * a new unconfirmed record should be generated regardless | |
1429 | * of whether any properties have changed. | |
1430 | */ | |
1431 | expire_client(unconf); | |
1432 | } | |
1433 | ||
1434 | out_new: | |
1435 | /* Normal case */ | |
b09333c4 | 1436 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1437 | if (new == NULL) { |
4731030d | 1438 | status = nfserr_jukebox; |
0733d213 AA |
1439 | goto out; |
1440 | } | |
1441 | ||
0733d213 | 1442 | gen_clid(new); |
0733d213 AA |
1443 | add_to_unconfirmed(new, strhashval); |
1444 | out_copy: | |
1445 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1446 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1447 | ||
38eb76a5 | 1448 | exid->seqid = 1; |
0733d213 AA |
1449 | nfsd4_set_ex_flags(new, exid); |
1450 | ||
1451 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1452 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1453 | status = nfs_ok; |
1454 | ||
1455 | out: | |
1456 | nfs4_unlock_state(); | |
1457 | error: | |
1458 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1459 | return status; | |
069b6ad4 AA |
1460 | } |
1461 | ||
b85d4c01 | 1462 | static int |
88e588d5 | 1463 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1464 | { |
88e588d5 AA |
1465 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1466 | slot_seqid); | |
b85d4c01 BH |
1467 | |
1468 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1469 | if (slot_inuse) { |
1470 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1471 | return nfserr_jukebox; |
1472 | else | |
1473 | return nfserr_seq_misordered; | |
1474 | } | |
1475 | /* Normal */ | |
88e588d5 | 1476 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1477 | return nfs_ok; |
1478 | /* Replay */ | |
88e588d5 | 1479 | if (seqid == slot_seqid) |
b85d4c01 BH |
1480 | return nfserr_replay_cache; |
1481 | /* Wraparound */ | |
88e588d5 | 1482 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1483 | return nfs_ok; |
1484 | /* Misordered replay or misordered new request */ | |
1485 | return nfserr_seq_misordered; | |
1486 | } | |
1487 | ||
49557cc7 AA |
1488 | /* |
1489 | * Cache the create session result into the create session single DRC | |
1490 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1491 | * Do this for solo or embedded create session operations. | |
1492 | */ | |
1493 | static void | |
1494 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1495 | struct nfsd4_clid_slot *slot, int nfserr) | |
1496 | { | |
1497 | slot->sl_status = nfserr; | |
1498 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1499 | } | |
1500 | ||
1501 | static __be32 | |
1502 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1503 | struct nfsd4_clid_slot *slot) | |
1504 | { | |
1505 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1506 | return slot->sl_status; | |
1507 | } | |
1508 | ||
1b74c25b MJ |
1509 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1510 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1511 | 1 + /* MIN tag is length with zero, only length */ \ | |
1512 | 3 + /* version, opcount, opcode */ \ | |
1513 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1514 | /* seqid, slotID, slotID, cache */ \ | |
1515 | 4 ) * sizeof(__be32)) | |
1516 | ||
1517 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1518 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1519 | 1 + /* status */ \ | |
1520 | 1 + /* MIN tag is length with zero, only length */ \ | |
1521 | 3 + /* opcount, opcode, opstatus*/ \ | |
1522 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1523 | /* seqid, slotID, slotID, slotID, status */ \ | |
1524 | 5 ) * sizeof(__be32)) | |
1525 | ||
1526 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) | |
1527 | { | |
1528 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1529 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1530 | } | |
1531 | ||
069b6ad4 AA |
1532 | __be32 |
1533 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1534 | struct nfsd4_compound_state *cstate, | |
1535 | struct nfsd4_create_session *cr_ses) | |
1536 | { | |
363168b4 | 1537 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1538 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1539 | struct nfsd4_session *new; |
49557cc7 | 1540 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1541 | bool confirm_me = false; |
ec6b5d7b AA |
1542 | int status = 0; |
1543 | ||
a62573dc MJ |
1544 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1545 | return nfserr_inval; | |
1546 | ||
ec6b5d7b AA |
1547 | nfs4_lock_state(); |
1548 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1549 | conf = find_confirmed_client(&cr_ses->clientid); | |
1550 | ||
1551 | if (conf) { | |
49557cc7 AA |
1552 | cs_slot = &conf->cl_cs_slot; |
1553 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1554 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1555 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1556 | cs_slot->sl_seqid); |
38eb76a5 | 1557 | /* Return the cached reply status */ |
49557cc7 | 1558 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1559 | goto out; |
49557cc7 | 1560 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1561 | status = nfserr_seq_misordered; |
1562 | dprintk("Sequence misordered!\n"); | |
1563 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1564 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1565 | goto out; |
1566 | } | |
ec6b5d7b AA |
1567 | } else if (unconf) { |
1568 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1569 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1570 | status = nfserr_clid_inuse; |
1571 | goto out; | |
1572 | } | |
1573 | ||
49557cc7 AA |
1574 | cs_slot = &unconf->cl_cs_slot; |
1575 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1576 | if (status) { |
1577 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1578 | status = nfserr_seq_misordered; |
cd5b8144 | 1579 | goto out; |
ec6b5d7b AA |
1580 | } |
1581 | ||
86c3e16c | 1582 | confirm_me = true; |
ec6b5d7b AA |
1583 | conf = unconf; |
1584 | } else { | |
1585 | status = nfserr_stale_clientid; | |
1586 | goto out; | |
1587 | } | |
1588 | ||
8323c3b2 BF |
1589 | /* |
1590 | * XXX: we should probably set this at creation time, and check | |
1591 | * for consistent minorversion use throughout: | |
1592 | */ | |
1593 | conf->cl_minorversion = 1; | |
408b79bc BF |
1594 | /* |
1595 | * We do not support RDMA or persistent sessions | |
1596 | */ | |
1597 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1598 | cr_ses->flags &= ~SESSION4_RDMA; | |
1599 | ||
1b74c25b MJ |
1600 | status = nfserr_toosmall; |
1601 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1602 | goto out; | |
1603 | ||
ac7c46f2 BF |
1604 | status = nfserr_jukebox; |
1605 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1606 | if (!new) | |
ec6b5d7b | 1607 | goto out; |
ac7c46f2 BF |
1608 | status = nfs_ok; |
1609 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1610 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1611 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1612 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1613 | cs_slot->sl_seqid++; |
49557cc7 | 1614 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1615 | |
49557cc7 AA |
1616 | /* cache solo and embedded create sessions under the state lock */ |
1617 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1618 | if (confirm_me) |
1619 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1620 | out: |
1621 | nfs4_unlock_state(); | |
1622 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1623 | return status; | |
069b6ad4 AA |
1624 | } |
1625 | ||
57716355 BF |
1626 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1627 | { | |
1628 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1629 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1630 | ||
1631 | return argp->opcnt == resp->opcnt; | |
1632 | } | |
1633 | ||
1d1bc8f2 BF |
1634 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1635 | { | |
1636 | switch (*dir) { | |
1637 | case NFS4_CDFC4_FORE: | |
1638 | case NFS4_CDFC4_BACK: | |
1639 | return nfs_ok; | |
1640 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1641 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1642 | *dir = NFS4_CDFC4_BOTH; | |
1643 | return nfs_ok; | |
1644 | }; | |
1645 | return nfserr_inval; | |
1646 | } | |
1647 | ||
1648 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1649 | struct nfsd4_compound_state *cstate, | |
1650 | struct nfsd4_bind_conn_to_session *bcts) | |
1651 | { | |
1652 | __be32 status; | |
1653 | ||
1654 | if (!nfsd4_last_compound_op(rqstp)) | |
1655 | return nfserr_not_only_op; | |
1656 | spin_lock(&client_lock); | |
1657 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1658 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1659 | * client_lock iself: */ | |
1660 | if (cstate->session) { | |
1661 | nfsd4_get_session(cstate->session); | |
1662 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1663 | } | |
1664 | spin_unlock(&client_lock); | |
1665 | if (!cstate->session) | |
1666 | return nfserr_badsession; | |
1667 | ||
1668 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1669 | if (!status) |
1670 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1671 | return status; | |
1d1bc8f2 BF |
1672 | } |
1673 | ||
5d4cec2f BF |
1674 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1675 | { | |
1676 | if (!session) | |
1677 | return 0; | |
1678 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1679 | } | |
1680 | ||
069b6ad4 AA |
1681 | __be32 |
1682 | nfsd4_destroy_session(struct svc_rqst *r, | |
1683 | struct nfsd4_compound_state *cstate, | |
1684 | struct nfsd4_destroy_session *sessionid) | |
1685 | { | |
e10e0cfc BH |
1686 | struct nfsd4_session *ses; |
1687 | u32 status = nfserr_badsession; | |
1688 | ||
1689 | /* Notes: | |
1690 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1691 | * - Should we return nfserr_back_chan_busy if waiting for | |
1692 | * callbacks on to-be-destroyed session? | |
1693 | * - Do we need to clear any callback info from previous session? | |
1694 | */ | |
1695 | ||
5d4cec2f | 1696 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1697 | if (!nfsd4_last_compound_op(r)) |
1698 | return nfserr_not_only_op; | |
1699 | } | |
e10e0cfc | 1700 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1701 | spin_lock(&client_lock); |
e10e0cfc BH |
1702 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1703 | if (!ses) { | |
9089f1b4 | 1704 | spin_unlock(&client_lock); |
e10e0cfc BH |
1705 | goto out; |
1706 | } | |
1707 | ||
1708 | unhash_session(ses); | |
9089f1b4 | 1709 | spin_unlock(&client_lock); |
e10e0cfc | 1710 | |
ab707e15 | 1711 | nfs4_lock_state(); |
84f5f7cc | 1712 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1713 | nfs4_unlock_state(); |
19cf5c02 BF |
1714 | |
1715 | nfsd4_del_conns(ses); | |
1716 | ||
e10e0cfc BH |
1717 | nfsd4_put_session(ses); |
1718 | status = nfs_ok; | |
1719 | out: | |
1720 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1721 | return status; | |
069b6ad4 AA |
1722 | } |
1723 | ||
a663bdd8 | 1724 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1725 | { |
1726 | struct nfsd4_conn *c; | |
1727 | ||
1728 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1729 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1730 | return c; |
1731 | } | |
1732 | } | |
1733 | return NULL; | |
1734 | } | |
1735 | ||
a663bdd8 | 1736 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1737 | { |
1738 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1739 | struct nfsd4_conn *c; |
21b75b01 | 1740 | int ret; |
328ead28 BF |
1741 | |
1742 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1743 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1744 | if (c) { |
1745 | spin_unlock(&clp->cl_lock); | |
1746 | free_conn(new); | |
1747 | return; | |
1748 | } | |
1749 | __nfsd4_hash_conn(new, ses); | |
1750 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1751 | ret = nfsd4_register_conn(new); |
1752 | if (ret) | |
1753 | /* oops; xprt is already down: */ | |
1754 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1755 | return; |
1756 | } | |
1757 | ||
868b89c3 MJ |
1758 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1759 | { | |
1760 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1761 | ||
1762 | return args->opcnt > session->se_fchannel.maxops; | |
1763 | } | |
1764 | ||
ae82a8d0 MJ |
1765 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1766 | struct nfsd4_session *session) | |
1767 | { | |
1768 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1769 | ||
1770 | return xb->len > session->se_fchannel.maxreq_sz; | |
1771 | } | |
1772 | ||
069b6ad4 | 1773 | __be32 |
b85d4c01 | 1774 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1775 | struct nfsd4_compound_state *cstate, |
1776 | struct nfsd4_sequence *seq) | |
1777 | { | |
f9bb94c4 | 1778 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1779 | struct nfsd4_session *session; |
1780 | struct nfsd4_slot *slot; | |
a663bdd8 | 1781 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1782 | int status; |
1783 | ||
f9bb94c4 AA |
1784 | if (resp->opcnt != 1) |
1785 | return nfserr_sequence_pos; | |
1786 | ||
a663bdd8 BF |
1787 | /* |
1788 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1789 | * below. | |
1790 | */ | |
1791 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1792 | if (!conn) | |
1793 | return nfserr_jukebox; | |
1794 | ||
9089f1b4 | 1795 | spin_lock(&client_lock); |
b85d4c01 BH |
1796 | status = nfserr_badsession; |
1797 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1798 | if (!session) | |
1799 | goto out; | |
1800 | ||
868b89c3 MJ |
1801 | status = nfserr_too_many_ops; |
1802 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1803 | goto out; | |
1804 | ||
ae82a8d0 MJ |
1805 | status = nfserr_req_too_big; |
1806 | if (nfsd4_request_too_big(rqstp, session)) | |
1807 | goto out; | |
1808 | ||
b85d4c01 | 1809 | status = nfserr_badslot; |
6c18ba9f | 1810 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1811 | goto out; |
1812 | ||
557ce264 | 1813 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1814 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1815 | ||
a8dfdaeb AA |
1816 | /* We do not negotiate the number of slots yet, so set the |
1817 | * maxslots to the session maxreqs which is used to encode | |
1818 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1819 | seq->maxslots = session->se_fchannel.maxreqs; | |
1820 | ||
88e588d5 | 1821 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1822 | if (status == nfserr_replay_cache) { |
1823 | cstate->slot = slot; | |
1824 | cstate->session = session; | |
da3846a2 | 1825 | /* Return the cached reply status and set cstate->status |
557ce264 | 1826 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1827 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1828 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1829 | goto out; |
b85d4c01 BH |
1830 | } |
1831 | if (status) | |
1832 | goto out; | |
1833 | ||
a663bdd8 BF |
1834 | nfsd4_sequence_check_conn(conn, session); |
1835 | conn = NULL; | |
328ead28 | 1836 | |
b85d4c01 BH |
1837 | /* Success! bump slot seqid */ |
1838 | slot->sl_inuse = true; | |
1839 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1840 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1841 | |
1842 | cstate->slot = slot; | |
1843 | cstate->session = session; | |
1844 | ||
b85d4c01 | 1845 | out: |
26c0c75e | 1846 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1847 | if (cstate->session) { |
0d7bb719 BF |
1848 | struct nfs4_client *clp = session->se_client; |
1849 | ||
36acb66b | 1850 | nfsd4_get_session(cstate->session); |
0d7bb719 BF |
1851 | atomic_inc(&clp->cl_refcount); |
1852 | if (clp->cl_cb_state == NFSD4_CB_DOWN) | |
1853 | seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; | |
aaf84eb9 | 1854 | } |
a663bdd8 | 1855 | kfree(conn); |
36acb66b | 1856 | spin_unlock(&client_lock); |
b85d4c01 BH |
1857 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1858 | return status; | |
069b6ad4 AA |
1859 | } |
1860 | ||
4dc6ec00 BF |
1861 | __be32 |
1862 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1863 | { | |
bcecf1cc MJ |
1864 | int status = 0; |
1865 | ||
4dc6ec00 BF |
1866 | if (rc->rca_one_fs) { |
1867 | if (!cstate->current_fh.fh_dentry) | |
1868 | return nfserr_nofilehandle; | |
1869 | /* | |
1870 | * We don't take advantage of the rca_one_fs case. | |
1871 | * That's OK, it's optional, we can safely ignore it. | |
1872 | */ | |
1873 | return nfs_ok; | |
1874 | } | |
bcecf1cc | 1875 | |
4dc6ec00 | 1876 | nfs4_lock_state(); |
bcecf1cc MJ |
1877 | status = nfserr_complete_already; |
1878 | if (cstate->session->se_client->cl_firststate) | |
1879 | goto out; | |
1880 | ||
1881 | status = nfserr_stale_clientid; | |
1882 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
1883 | /* |
1884 | * The following error isn't really legal. | |
1885 | * But we only get here if the client just explicitly | |
1886 | * destroyed the client. Surely it no longer cares what | |
1887 | * error it gets back on an operation for the dead | |
1888 | * client. | |
1889 | */ | |
bcecf1cc MJ |
1890 | goto out; |
1891 | ||
1892 | status = nfs_ok; | |
4dc6ec00 | 1893 | nfsd4_create_clid_dir(cstate->session->se_client); |
bcecf1cc | 1894 | out: |
4dc6ec00 | 1895 | nfs4_unlock_state(); |
bcecf1cc | 1896 | return status; |
4dc6ec00 BF |
1897 | } |
1898 | ||
b37ad28b | 1899 | __be32 |
b591480b BF |
1900 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1901 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1902 | { |
1da177e4 LT |
1903 | struct xdr_netobj clname = { |
1904 | .len = setclid->se_namelen, | |
1905 | .data = setclid->se_name, | |
1906 | }; | |
1907 | nfs4_verifier clverifier = setclid->se_verf; | |
1908 | unsigned int strhashval; | |
28ce6054 | 1909 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1910 | __be32 status; |
a55370a3 | 1911 | char dname[HEXDIR_LEN]; |
1da177e4 | 1912 | |
1da177e4 | 1913 | if (!check_name(clname)) |
73aea4ec | 1914 | return nfserr_inval; |
1da177e4 | 1915 | |
a55370a3 N |
1916 | status = nfs4_make_rec_clidname(dname, &clname); |
1917 | if (status) | |
73aea4ec | 1918 | return status; |
a55370a3 | 1919 | |
1da177e4 LT |
1920 | /* |
1921 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1922 | * We get here on a DRC miss. | |
1923 | */ | |
1924 | ||
a55370a3 | 1925 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1926 | |
1da177e4 | 1927 | nfs4_lock_state(); |
e203d506 | 1928 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 1929 | if (conf) { |
a186e767 | 1930 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1931 | status = nfserr_clid_inuse; |
e203d506 BF |
1932 | if (clp_used_exchangeid(conf)) |
1933 | goto out; | |
026722c2 | 1934 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1935 | char addr_str[INET6_ADDRSTRLEN]; |
1936 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1937 | sizeof(addr_str)); | |
1938 | dprintk("NFSD: setclientid: string in use by client " | |
1939 | "at %s\n", addr_str); | |
1da177e4 LT |
1940 | goto out; |
1941 | } | |
1da177e4 | 1942 | } |
a186e767 BF |
1943 | /* |
1944 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1945 | * has a description of SETCLIENTID request processing consisting | |
1946 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1947 | */ | |
e203d506 | 1948 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
1da177e4 LT |
1949 | status = nfserr_resource; |
1950 | if (!conf) { | |
a186e767 BF |
1951 | /* |
1952 | * RFC 3530 14.2.33 CASE 4: | |
1953 | * placed first, because it is the normal case | |
1da177e4 LT |
1954 | */ |
1955 | if (unconf) | |
1956 | expire_client(unconf); | |
b09333c4 | 1957 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1958 | if (new == NULL) |
1da177e4 | 1959 | goto out; |
1da177e4 | 1960 | gen_clid(new); |
599e0a22 | 1961 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1962 | /* |
a186e767 BF |
1963 | * RFC 3530 14.2.33 CASE 1: |
1964 | * probable callback update | |
1da177e4 | 1965 | */ |
31f4a6c1 N |
1966 | if (unconf) { |
1967 | /* Note this is removing unconfirmed {*x***}, | |
1968 | * which is stronger than RFC recommended {vxc**}. | |
1969 | * This has the advantage that there is at most | |
1970 | * one {*x***} in either list at any time. | |
1971 | */ | |
1972 | expire_client(unconf); | |
1da177e4 | 1973 | } |
b09333c4 | 1974 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1975 | if (new == NULL) |
1da177e4 | 1976 | goto out; |
1da177e4 | 1977 | copy_clid(new, conf); |
1da177e4 LT |
1978 | } else if (!unconf) { |
1979 | /* | |
a186e767 BF |
1980 | * RFC 3530 14.2.33 CASE 2: |
1981 | * probable client reboot; state will be removed if | |
1982 | * confirmed. | |
1da177e4 | 1983 | */ |
b09333c4 | 1984 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1985 | if (new == NULL) |
1da177e4 | 1986 | goto out; |
1da177e4 | 1987 | gen_clid(new); |
49ba8781 | 1988 | } else { |
a186e767 BF |
1989 | /* |
1990 | * RFC 3530 14.2.33 CASE 3: | |
1991 | * probable client reboot; state will be removed if | |
1992 | * confirmed. | |
1da177e4 LT |
1993 | */ |
1994 | expire_client(unconf); | |
b09333c4 | 1995 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1996 | if (new == NULL) |
1da177e4 | 1997 | goto out; |
1da177e4 | 1998 | gen_clid(new); |
1da177e4 | 1999 | } |
8323c3b2 BF |
2000 | /* |
2001 | * XXX: we should probably set this at creation time, and check | |
2002 | * for consistent minorversion use throughout: | |
2003 | */ | |
2004 | new->cl_minorversion = 0; | |
6f3d772f | 2005 | gen_callback(new, setclid, rqstp); |
c175b83c | 2006 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2007 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2008 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2009 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2010 | status = nfs_ok; | |
2011 | out: | |
2012 | nfs4_unlock_state(); | |
2013 | return status; | |
2014 | } | |
2015 | ||
2016 | ||
2017 | /* | |
a186e767 BF |
2018 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2019 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2020 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2021 | */ |
b37ad28b | 2022 | __be32 |
b591480b BF |
2023 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2024 | struct nfsd4_compound_state *cstate, | |
2025 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2026 | { |
363168b4 | 2027 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 2028 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2029 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2030 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2031 | __be32 status; |
1da177e4 LT |
2032 | |
2033 | if (STALE_CLIENTID(clid)) | |
2034 | return nfserr_stale_clientid; | |
2035 | /* | |
2036 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2037 | * We get here on a DRC miss. | |
2038 | */ | |
2039 | ||
2040 | nfs4_lock_state(); | |
21ab45a4 N |
2041 | |
2042 | conf = find_confirmed_client(clid); | |
2043 | unconf = find_unconfirmed_client(clid); | |
2044 | ||
2045 | status = nfserr_clid_inuse; | |
363168b4 | 2046 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 2047 | goto out; |
363168b4 | 2048 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
2049 | goto out; |
2050 | ||
a186e767 BF |
2051 | /* |
2052 | * section 14.2.34 of RFC 3530 has a description of | |
2053 | * SETCLIENTID_CONFIRM request processing consisting | |
2054 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2055 | */ | |
366e0c1d | 2056 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2057 | /* |
2058 | * RFC 3530 14.2.34 CASE 1: | |
2059 | * callback update | |
2060 | */ | |
599e0a22 | 2061 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2062 | status = nfserr_clid_inuse; |
2063 | else { | |
5a3c9d71 BF |
2064 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2065 | nfsd4_probe_callback(conf); | |
1a69c179 | 2066 | expire_client(unconf); |
1da177e4 | 2067 | status = nfs_ok; |
1a69c179 | 2068 | |
1da177e4 | 2069 | } |
f3aba4e5 | 2070 | } else if (conf && !unconf) { |
a186e767 BF |
2071 | /* |
2072 | * RFC 3530 14.2.34 CASE 2: | |
2073 | * probable retransmitted request; play it safe and | |
2074 | * do nothing. | |
7c79f737 | 2075 | */ |
599e0a22 | 2076 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2077 | status = nfserr_clid_inuse; |
21ab45a4 | 2078 | else |
1da177e4 | 2079 | status = nfs_ok; |
7c79f737 | 2080 | } else if (!conf && unconf |
599e0a22 | 2081 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2082 | /* |
2083 | * RFC 3530 14.2.34 CASE 3: | |
2084 | * Normal case; new or rebooted client: | |
7c79f737 | 2085 | */ |
599e0a22 | 2086 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2087 | status = nfserr_clid_inuse; |
2088 | } else { | |
1a69c179 N |
2089 | unsigned int hash = |
2090 | clientstr_hashval(unconf->cl_recdir); | |
2091 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2092 | hash); |
1a69c179 | 2093 | if (conf) { |
c7b9a459 | 2094 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2095 | expire_client(conf); |
2096 | } | |
1da177e4 | 2097 | move_to_confirmed(unconf); |
21ab45a4 | 2098 | conf = unconf; |
5a3c9d71 | 2099 | nfsd4_probe_callback(conf); |
1a69c179 | 2100 | status = nfs_ok; |
1da177e4 | 2101 | } |
599e0a22 BF |
2102 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2103 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2104 | &confirm)))) { |
a186e767 BF |
2105 | /* |
2106 | * RFC 3530 14.2.34 CASE 4: | |
2107 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2108 | */ |
1da177e4 | 2109 | status = nfserr_stale_clientid; |
7c79f737 | 2110 | } else { |
08e8987c N |
2111 | /* check that we have hit one of the cases...*/ |
2112 | status = nfserr_clid_inuse; | |
2113 | } | |
1da177e4 | 2114 | out: |
1da177e4 LT |
2115 | nfs4_unlock_state(); |
2116 | return status; | |
2117 | } | |
2118 | ||
1da177e4 LT |
2119 | /* OPEN Share state helper functions */ |
2120 | static inline struct nfs4_file * | |
2121 | alloc_init_file(struct inode *ino) | |
2122 | { | |
2123 | struct nfs4_file *fp; | |
2124 | unsigned int hashval = file_hashval(ino); | |
2125 | ||
e60d4398 N |
2126 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
2127 | if (fp) { | |
8b671b80 | 2128 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 2129 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
2130 | INIT_LIST_HEAD(&fp->fi_stateids); |
2131 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
2132 | fp->fi_inode = igrab(ino); |
2133 | fp->fi_id = current_fileid++; | |
47f9940c | 2134 | fp->fi_had_conflict = false; |
acfdf5c3 | 2135 | fp->fi_lease = NULL; |
f9d7562f BF |
2136 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2137 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
2138 | spin_lock(&recall_lock); |
2139 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2140 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2141 | return fp; |
2142 | } | |
2143 | return NULL; | |
2144 | } | |
2145 | ||
e60d4398 | 2146 | static void |
e18b890b | 2147 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2148 | { |
e60d4398 N |
2149 | if (*slab == NULL) |
2150 | return; | |
1a1d92c1 | 2151 | kmem_cache_destroy(*slab); |
e60d4398 | 2152 | *slab = NULL; |
1da177e4 LT |
2153 | } |
2154 | ||
e8ff2a84 | 2155 | void |
1da177e4 LT |
2156 | nfsd4_free_slabs(void) |
2157 | { | |
e60d4398 N |
2158 | nfsd4_free_slab(&stateowner_slab); |
2159 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 2160 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2161 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2162 | } |
1da177e4 | 2163 | |
e60d4398 N |
2164 | static int |
2165 | nfsd4_init_slabs(void) | |
2166 | { | |
2167 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 2168 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
2169 | if (stateowner_slab == NULL) |
2170 | goto out_nomem; | |
2171 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2172 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2173 | if (file_slab == NULL) |
2174 | goto out_nomem; | |
5ac049ac | 2175 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 2176 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
2177 | if (stateid_slab == NULL) |
2178 | goto out_nomem; | |
5b2d21c1 | 2179 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2180 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2181 | if (deleg_slab == NULL) |
2182 | goto out_nomem; | |
e60d4398 N |
2183 | return 0; |
2184 | out_nomem: | |
2185 | nfsd4_free_slabs(); | |
2186 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2187 | return -ENOMEM; | |
1da177e4 LT |
2188 | } |
2189 | ||
2190 | void | |
2191 | nfs4_free_stateowner(struct kref *kref) | |
2192 | { | |
2193 | struct nfs4_stateowner *sop = | |
2194 | container_of(kref, struct nfs4_stateowner, so_ref); | |
2195 | kfree(sop->so_owner.data); | |
2196 | kmem_cache_free(stateowner_slab, sop); | |
2197 | } | |
2198 | ||
2199 | static inline struct nfs4_stateowner * | |
2200 | alloc_stateowner(struct xdr_netobj *owner) | |
2201 | { | |
2202 | struct nfs4_stateowner *sop; | |
2203 | ||
2204 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
2205 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
2206 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
2207 | sop->so_owner.len = owner->len; | |
2208 | kref_init(&sop->so_ref); | |
2209 | return sop; | |
2210 | } | |
2211 | kmem_cache_free(stateowner_slab, sop); | |
2212 | } | |
2213 | return NULL; | |
2214 | } | |
2215 | ||
2216 | static struct nfs4_stateowner * | |
2217 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
2218 | struct nfs4_stateowner *sop; | |
2219 | struct nfs4_replay *rp; | |
2220 | unsigned int idhashval; | |
2221 | ||
2222 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
2223 | return NULL; | |
2224 | idhashval = ownerid_hashval(current_ownerid); | |
2225 | INIT_LIST_HEAD(&sop->so_idhash); | |
2226 | INIT_LIST_HEAD(&sop->so_strhash); | |
2227 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2228 | INIT_LIST_HEAD(&sop->so_stateids); |
2229 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
2230 | INIT_LIST_HEAD(&sop->so_close_lru); |
2231 | sop->so_time = 0; | |
2232 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
2233 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2234 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
2235 | sop->so_is_open_owner = 1; |
2236 | sop->so_id = current_ownerid++; | |
2237 | sop->so_client = clp; | |
2238 | sop->so_seqid = open->op_seqid; | |
2239 | sop->so_confirmed = 0; | |
2240 | rp = &sop->so_replay; | |
de1ae286 | 2241 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2242 | rp->rp_buflen = 0; |
2243 | rp->rp_buf = rp->rp_ibuf; | |
2244 | return sop; | |
2245 | } | |
2246 | ||
1da177e4 LT |
2247 | static inline void |
2248 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
2249 | struct nfs4_stateowner *sop = open->op_stateowner; | |
2250 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2251 | ||
2252 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
2253 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2254 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
2255 | INIT_LIST_HEAD(&stp->st_perfile); |
2256 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 2257 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 2258 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 2259 | stp->st_stateowner = sop; |
13cd2184 | 2260 | get_nfs4_file(fp); |
1da177e4 | 2261 | stp->st_file = fp; |
e4e83ea4 | 2262 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
2263 | stp->st_stateid.si_stateownerid = sop->so_id; |
2264 | stp->st_stateid.si_fileid = fp->fi_id; | |
2265 | stp->st_stateid.si_generation = 0; | |
2266 | stp->st_access_bmap = 0; | |
2267 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2268 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2269 | &stp->st_access_bmap); | |
1da177e4 | 2270 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2271 | stp->st_openstp = NULL; |
1da177e4 LT |
2272 | } |
2273 | ||
fd39ca9a | 2274 | static void |
1da177e4 LT |
2275 | move_to_close_lru(struct nfs4_stateowner *sop) |
2276 | { | |
2277 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
2278 | ||
358dd55a | 2279 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
2280 | sop->so_time = get_seconds(); |
2281 | } | |
2282 | ||
1da177e4 | 2283 | static int |
599e0a22 BF |
2284 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2285 | clientid_t *clid) | |
2286 | { | |
2287 | return (sop->so_owner.len == owner->len) && | |
2288 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2289 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2290 | } |
2291 | ||
2292 | static struct nfs4_stateowner * | |
2293 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
2294 | { | |
2295 | struct nfs4_stateowner *so = NULL; | |
2296 | ||
2297 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 2298 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
2299 | return so; |
2300 | } | |
2301 | return NULL; | |
2302 | } | |
2303 | ||
2304 | /* search file_hashtbl[] for file */ | |
2305 | static struct nfs4_file * | |
2306 | find_file(struct inode *ino) | |
2307 | { | |
2308 | unsigned int hashval = file_hashval(ino); | |
2309 | struct nfs4_file *fp; | |
2310 | ||
8b671b80 | 2311 | spin_lock(&recall_lock); |
1da177e4 | 2312 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2313 | if (fp->fi_inode == ino) { |
2314 | get_nfs4_file(fp); | |
8b671b80 | 2315 | spin_unlock(&recall_lock); |
1da177e4 | 2316 | return fp; |
13cd2184 | 2317 | } |
1da177e4 | 2318 | } |
8b671b80 | 2319 | spin_unlock(&recall_lock); |
1da177e4 LT |
2320 | return NULL; |
2321 | } | |
2322 | ||
d87a8ade | 2323 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2324 | { |
d87a8ade | 2325 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2326 | return 0; |
d87a8ade AA |
2327 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2328 | return 0; | |
2329 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2330 | if (minorversion && x) { | |
2331 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2332 | return 0; | |
2333 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2334 | return 0; | |
2335 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2336 | } | |
2337 | if (x) | |
8838dc43 BF |
2338 | return 0; |
2339 | return 1; | |
ba5a6a19 BF |
2340 | } |
2341 | ||
8838dc43 | 2342 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2343 | { |
8838dc43 BF |
2344 | /* Note: unlike access bits, deny bits may be zero. */ |
2345 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2346 | } |
1da177e4 | 2347 | |
1da177e4 LT |
2348 | /* |
2349 | * Called to check deny when READ with all zero stateid or | |
2350 | * WRITE with all zero or all one stateid | |
2351 | */ | |
b37ad28b | 2352 | static __be32 |
1da177e4 LT |
2353 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2354 | { | |
2355 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2356 | struct nfs4_file *fp; | |
2357 | struct nfs4_stateid *stp; | |
b37ad28b | 2358 | __be32 ret; |
1da177e4 LT |
2359 | |
2360 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2361 | ||
2362 | fp = find_file(ino); | |
13cd2184 N |
2363 | if (!fp) |
2364 | return nfs_ok; | |
b700949b | 2365 | ret = nfserr_locked; |
1da177e4 | 2366 | /* Search for conflicting share reservations */ |
13cd2184 N |
2367 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2368 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2369 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2370 | goto out; | |
1da177e4 | 2371 | } |
13cd2184 N |
2372 | ret = nfs_ok; |
2373 | out: | |
2374 | put_nfs4_file(fp); | |
2375 | return ret; | |
1da177e4 LT |
2376 | } |
2377 | ||
6b57d9c8 | 2378 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2379 | { |
1da177e4 LT |
2380 | /* We're assuming the state code never drops its reference |
2381 | * without first removing the lease. Since we're in this lease | |
2382 | * callback (and since the lease code is serialized by the kernel | |
2383 | * lock) we know the server hasn't removed the lease yet, we know | |
2384 | * it's safe to take a reference: */ | |
2385 | atomic_inc(&dp->dl_count); | |
2386 | ||
1da177e4 | 2387 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2388 | |
460781b5 | 2389 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2390 | dp->dl_time = get_seconds(); |
2391 | ||
6b57d9c8 BF |
2392 | nfsd4_cb_recall(dp); |
2393 | } | |
2394 | ||
acfdf5c3 | 2395 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2396 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2397 | { | |
acfdf5c3 BF |
2398 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2399 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2400 | |
acfdf5c3 BF |
2401 | BUG_ON(!fp); |
2402 | /* We assume break_lease is only called once per lease: */ | |
2403 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2404 | /* |
2405 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2406 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2407 | * in time: |
0272e1fd BF |
2408 | */ |
2409 | fl->fl_break_time = 0; | |
1da177e4 | 2410 | |
5d926e8c | 2411 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2412 | fp->fi_had_conflict = true; |
2413 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2414 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2415 | spin_unlock(&recall_lock); |
1da177e4 LT |
2416 | } |
2417 | ||
1da177e4 LT |
2418 | static |
2419 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2420 | { | |
2421 | if (arg & F_UNLCK) | |
2422 | return lease_modify(onlist, arg); | |
2423 | else | |
2424 | return -EAGAIN; | |
2425 | } | |
2426 | ||
7b021967 | 2427 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 | 2428 | .fl_break = nfsd_break_deleg_cb, |
1da177e4 LT |
2429 | .fl_change = nfsd_change_deleg_cb, |
2430 | }; | |
2431 | ||
2432 | ||
b37ad28b | 2433 | __be32 |
6668958f AA |
2434 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2435 | struct nfsd4_open *open) | |
1da177e4 | 2436 | { |
1da177e4 LT |
2437 | clientid_t *clientid = &open->op_clientid; |
2438 | struct nfs4_client *clp = NULL; | |
2439 | unsigned int strhashval; | |
2440 | struct nfs4_stateowner *sop = NULL; | |
2441 | ||
1da177e4 | 2442 | if (!check_name(open->op_owner)) |
0f442aa2 | 2443 | return nfserr_inval; |
1da177e4 LT |
2444 | |
2445 | if (STALE_CLIENTID(&open->op_clientid)) | |
2446 | return nfserr_stale_clientid; | |
2447 | ||
2448 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2449 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2450 | open->op_stateowner = sop; |
2451 | if (!sop) { | |
2452 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2453 | clp = find_confirmed_client(clientid); |
2454 | if (clp == NULL) | |
0f442aa2 BF |
2455 | return nfserr_expired; |
2456 | goto renew; | |
1da177e4 | 2457 | } |
6668958f AA |
2458 | /* When sessions are used, skip open sequenceid processing */ |
2459 | if (nfsd4_has_session(cstate)) | |
2460 | goto renew; | |
0f442aa2 BF |
2461 | if (!sop->so_confirmed) { |
2462 | /* Replace unconfirmed owners without checking for replay. */ | |
2463 | clp = sop->so_client; | |
f044ff83 | 2464 | release_openowner(sop); |
0f442aa2 BF |
2465 | open->op_stateowner = NULL; |
2466 | goto renew; | |
2467 | } | |
2468 | if (open->op_seqid == sop->so_seqid - 1) { | |
2469 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2470 | return nfserr_replay_me; |
0f442aa2 BF |
2471 | /* The original OPEN failed so spectacularly |
2472 | * that we don't even have replay data saved! | |
2473 | * Therefore, we have no choice but to continue | |
2474 | * processing this OPEN; presumably, we'll | |
2475 | * fail again for the same reason. | |
2476 | */ | |
2477 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2478 | goto renew; | |
2479 | } | |
2480 | if (open->op_seqid != sop->so_seqid) | |
2481 | return nfserr_bad_seqid; | |
1da177e4 | 2482 | renew: |
0f442aa2 BF |
2483 | if (open->op_stateowner == NULL) { |
2484 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2485 | if (sop == NULL) | |
2486 | return nfserr_resource; | |
2487 | open->op_stateowner = sop; | |
2488 | } | |
2489 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2490 | renew_client(sop->so_client); |
0f442aa2 | 2491 | return nfs_ok; |
1da177e4 LT |
2492 | } |
2493 | ||
b37ad28b | 2494 | static inline __be32 |
4a6e43e6 N |
2495 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2496 | { | |
2497 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2498 | return nfserr_openmode; | |
2499 | else | |
2500 | return nfs_ok; | |
2501 | } | |
2502 | ||
52f4fb43 N |
2503 | static struct nfs4_delegation * |
2504 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2505 | { | |
32b007b4 | 2506 | struct nfs4_delegation *dp; |
52f4fb43 | 2507 | |
acfdf5c3 | 2508 | spin_lock(&recall_lock); |
32b007b4 BF |
2509 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) |
2510 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) { | |
2511 | spin_unlock(&recall_lock); | |
2512 | return dp; | |
2513 | } | |
acfdf5c3 | 2514 | spin_unlock(&recall_lock); |
32b007b4 | 2515 | return NULL; |
52f4fb43 N |
2516 | } |
2517 | ||
c47d832b | 2518 | static int share_access_to_flags(u32 share_access) |
24a0111e BF |
2519 | { |
2520 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2521 | ||
2522 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2523 | } | |
2524 | ||
b37ad28b | 2525 | static __be32 |
567d9829 N |
2526 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2527 | struct nfs4_delegation **dp) | |
2528 | { | |
2529 | int flags; | |
b37ad28b | 2530 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2531 | |
2532 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2533 | if (*dp == NULL) | |
c44c5eeb | 2534 | goto out; |
24a0111e | 2535 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2536 | status = nfs4_check_delegmode(*dp, flags); |
2537 | if (status) | |
2538 | *dp = NULL; | |
c44c5eeb N |
2539 | out: |
2540 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2541 | return nfs_ok; | |
2542 | if (status) | |
2543 | return status; | |
2544 | open->op_stateowner->so_confirmed = 1; | |
2545 | return nfs_ok; | |
567d9829 N |
2546 | } |
2547 | ||
b37ad28b | 2548 | static __be32 |
1da177e4 LT |
2549 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2550 | { | |
2551 | struct nfs4_stateid *local; | |
b37ad28b | 2552 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2553 | struct nfs4_stateowner *sop = open->op_stateowner; |
2554 | ||
8beefa24 | 2555 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2556 | /* ignore lock owners */ |
2557 | if (local->st_stateowner->so_is_open_owner == 0) | |
2558 | continue; | |
2559 | /* remember if we have seen this open owner */ | |
2560 | if (local->st_stateowner == sop) | |
2561 | *stpp = local; | |
2562 | /* check for conflicting share reservations */ | |
2563 | if (!test_share(local, open)) | |
2564 | goto out; | |
2565 | } | |
2566 | status = 0; | |
2567 | out: | |
2568 | return status; | |
2569 | } | |
2570 | ||
5ac049ac N |
2571 | static inline struct nfs4_stateid * |
2572 | nfs4_alloc_stateid(void) | |
2573 | { | |
2574 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2575 | } | |
2576 | ||
21fb4016 BF |
2577 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2578 | { | |
2579 | int flags = 0; | |
2580 | ||
2581 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2582 | flags |= NFSD_MAY_READ; | |
2583 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2584 | flags |= NFSD_MAY_WRITE; | |
2585 | return flags; | |
2586 | } | |
2587 | ||
f9d7562f BF |
2588 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file |
2589 | *fp, struct svc_fh *cur_fh, u32 nfs4_access) | |
2590 | { | |
2591 | __be32 status; | |
2592 | int oflag = nfs4_access_to_omode(nfs4_access); | |
2593 | int access = nfs4_access_to_access(nfs4_access); | |
2594 | ||
2595 | if (!fp->fi_fds[oflag]) { | |
2596 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2597 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2598 | if (status) |
2599 | return status; | |
2600 | } | |
2601 | nfs4_file_get_access(fp, oflag); | |
2602 | ||
2603 | return nfs_ok; | |
2604 | } | |
2605 | ||
b37ad28b | 2606 | static __be32 |
1da177e4 | 2607 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
f9d7562f BF |
2608 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2609 | struct nfsd4_open *open) | |
1da177e4 LT |
2610 | { |
2611 | struct nfs4_stateid *stp; | |
f9d7562f | 2612 | __be32 status; |
1da177e4 | 2613 | |
5ac049ac | 2614 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2615 | if (stp == NULL) |
2616 | return nfserr_resource; | |
2617 | ||
f9d7562f BF |
2618 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open->op_share_access); |
2619 | if (status) { | |
2620 | kmem_cache_free(stateid_slab, stp); | |
2621 | return status; | |
1da177e4 | 2622 | } |
1da177e4 LT |
2623 | *stpp = stp; |
2624 | return 0; | |
2625 | } | |
2626 | ||
b37ad28b | 2627 | static inline __be32 |
1da177e4 LT |
2628 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2629 | struct nfsd4_open *open) | |
2630 | { | |
2631 | struct iattr iattr = { | |
2632 | .ia_valid = ATTR_SIZE, | |
2633 | .ia_size = 0, | |
2634 | }; | |
2635 | if (!open->op_truncate) | |
2636 | return 0; | |
2637 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2638 | return nfserr_inval; |
1da177e4 LT |
2639 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2640 | } | |
2641 | ||
b37ad28b | 2642 | static __be32 |
f9d7562f | 2643 | 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 | 2644 | { |
7d947842 BF |
2645 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2646 | bool new_access; | |
b37ad28b | 2647 | __be32 status; |
1da177e4 | 2648 | |
7d947842 | 2649 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2650 | if (new_access) { |
7d947842 | 2651 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, op_share_access); |
f9d7562f BF |
2652 | if (status) |
2653 | return status; | |
6c26d08f | 2654 | } |
1da177e4 LT |
2655 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2656 | if (status) { | |
f9d7562f | 2657 | if (new_access) { |
f197c271 | 2658 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2659 | nfs4_file_put_access(fp, oflag); |
2660 | } | |
1da177e4 LT |
2661 | return status; |
2662 | } | |
2663 | /* remember the open */ | |
24a0111e | 2664 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2665 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2666 | |
2667 | return nfs_ok; | |
2668 | } | |
2669 | ||
2670 | ||
1da177e4 | 2671 | static void |
37515177 | 2672 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2673 | { |
37515177 N |
2674 | open->op_stateowner->so_confirmed = 1; |
2675 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2676 | } |
2677 | ||
14a24e99 BF |
2678 | /* Should we give out recallable state?: */ |
2679 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2680 | { | |
2681 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2682 | return true; | |
2683 | /* | |
2684 | * In the sessions case, since we don't have to establish a | |
2685 | * separate connection for callbacks, we assume it's OK | |
2686 | * until we hear otherwise: | |
2687 | */ | |
2688 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2689 | } | |
2690 | ||
22d38c4c BF |
2691 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2692 | { | |
2693 | struct file_lock *fl; | |
2694 | ||
2695 | fl = locks_alloc_lock(); | |
2696 | if (!fl) | |
2697 | return NULL; | |
2698 | locks_init_lock(fl); | |
2699 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2700 | fl->fl_flags = FL_LEASE; | |
2701 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2702 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2703 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2704 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2705 | return fl; |
2706 | } | |
2707 | ||
edab9782 BF |
2708 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2709 | { | |
acfdf5c3 | 2710 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2711 | struct file_lock *fl; |
2712 | int status; | |
2713 | ||
2714 | fl = nfs4_alloc_init_lease(dp, flag); | |
2715 | if (!fl) | |
2716 | return -ENOMEM; | |
acfdf5c3 BF |
2717 | fl->fl_file = find_readable_file(fp); |
2718 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
2719 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); | |
edab9782 | 2720 | if (status) { |
acfdf5c3 | 2721 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2722 | locks_free_lock(fl); |
2723 | return -ENOMEM; | |
2724 | } | |
acfdf5c3 BF |
2725 | fp->fi_lease = fl; |
2726 | fp->fi_deleg_file = fl->fl_file; | |
2727 | get_file(fp->fi_deleg_file); | |
2728 | atomic_set(&fp->fi_delegees, 1); | |
2729 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2730 | return 0; | |
2731 | } | |
2732 | ||
2733 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2734 | { | |
2735 | struct nfs4_file *fp = dp->dl_file; | |
2736 | ||
2737 | if (!fp->fi_lease) | |
2738 | return nfs4_setlease(dp, flag); | |
2739 | spin_lock(&recall_lock); | |
2740 | if (fp->fi_had_conflict) { | |
2741 | spin_unlock(&recall_lock); | |
2742 | return -EAGAIN; | |
2743 | } | |
2744 | atomic_inc(&fp->fi_delegees); | |
2745 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2746 | spin_unlock(&recall_lock); | |
2747 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
edab9782 BF |
2748 | return 0; |
2749 | } | |
2750 | ||
1da177e4 LT |
2751 | /* |
2752 | * Attempt to hand out a delegation. | |
2753 | */ | |
2754 | static void | |
2755 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2756 | { | |
2757 | struct nfs4_delegation *dp; | |
2758 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
14a24e99 | 2759 | int cb_up; |
1da177e4 LT |
2760 | int status, flag = 0; |
2761 | ||
14a24e99 | 2762 | cb_up = nfsd4_cb_channel_good(sop->so_client); |
1da177e4 | 2763 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2764 | open->op_recall = 0; |
2765 | switch (open->op_claim_type) { | |
2766 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2767 | if (!cb_up) |
7b190fec N |
2768 | open->op_recall = 1; |
2769 | flag = open->op_delegate_type; | |
2770 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2771 | goto out; | |
2772 | break; | |
2773 | case NFS4_OPEN_CLAIM_NULL: | |
2774 | /* Let's not give out any delegations till everyone's | |
2775 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2776 | if (locks_in_grace()) |
7b190fec | 2777 | goto out; |
2bf23875 | 2778 | if (!cb_up || !sop->so_confirmed) |
7b190fec N |
2779 | goto out; |
2780 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2781 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2782 | else | |
2783 | flag = NFS4_OPEN_DELEGATE_READ; | |
2784 | break; | |
2785 | default: | |
2786 | goto out; | |
2787 | } | |
1da177e4 LT |
2788 | |
2789 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
dd239cc0 BF |
2790 | if (dp == NULL) |
2791 | goto out_no_deleg; | |
acfdf5c3 | 2792 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2793 | if (status) |
dd239cc0 | 2794 | goto out_free; |
1da177e4 LT |
2795 | |
2796 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2797 | ||
8c10cbdb BH |
2798 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2799 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2800 | out: |
7b190fec N |
2801 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2802 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2803 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2804 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2805 | open->op_delegate_type = flag; |
dd239cc0 BF |
2806 | return; |
2807 | out_free: | |
acfdf5c3 | 2808 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2809 | out_no_deleg: |
2810 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2811 | goto out; | |
1da177e4 LT |
2812 | } |
2813 | ||
2814 | /* | |
2815 | * called with nfs4_lock_state() held. | |
2816 | */ | |
b37ad28b | 2817 | __be32 |
1da177e4 LT |
2818 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2819 | { | |
6668958f | 2820 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2821 | struct nfs4_file *fp = NULL; |
2822 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2823 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2824 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2825 | __be32 status; |
1da177e4 LT |
2826 | |
2827 | status = nfserr_inval; | |
d87a8ade | 2828 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2829 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2830 | goto out; |
2831 | /* | |
2832 | * Lookup file; if found, lookup stateid and check open request, | |
2833 | * and check for delegations in the process of being recalled. | |
2834 | * If not found, create the nfs4_file struct | |
2835 | */ | |
2836 | fp = find_file(ino); | |
2837 | if (fp) { | |
2838 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2839 | goto out; | |
c44c5eeb N |
2840 | status = nfs4_check_deleg(fp, open, &dp); |
2841 | if (status) | |
2842 | goto out; | |
1da177e4 | 2843 | } else { |
c44c5eeb N |
2844 | status = nfserr_bad_stateid; |
2845 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2846 | goto out; | |
1da177e4 LT |
2847 | status = nfserr_resource; |
2848 | fp = alloc_init_file(ino); | |
2849 | if (fp == NULL) | |
2850 | goto out; | |
2851 | } | |
2852 | ||
2853 | /* | |
2854 | * OPEN the file, or upgrade an existing OPEN. | |
2855 | * If truncate fails, the OPEN fails. | |
2856 | */ | |
2857 | if (stp) { | |
2858 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2859 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2860 | if (status) |
2861 | goto out; | |
444c2c07 | 2862 | update_stateid(&stp->st_stateid); |
1da177e4 | 2863 | } else { |
f9d7562f | 2864 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2865 | if (status) |
1da177e4 LT |
2866 | goto out; |
2867 | init_stateid(stp, fp, open); | |
2868 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2869 | if (status) { | |
2283963f | 2870 | release_open_stateid(stp); |
1da177e4 LT |
2871 | goto out; |
2872 | } | |
6668958f AA |
2873 | if (nfsd4_has_session(&resp->cstate)) |
2874 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2875 | } |
2876 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2877 | ||
4dc6ec00 | 2878 | if (nfsd4_has_session(&resp->cstate)) |
6668958f AA |
2879 | open->op_stateowner->so_confirmed = 1; |
2880 | ||
1da177e4 LT |
2881 | /* |
2882 | * Attempt to hand out a delegation. No error return, because the | |
2883 | * OPEN succeeds even if we fail. | |
2884 | */ | |
2885 | nfs4_open_delegation(current_fh, open, stp); | |
2886 | ||
2887 | status = nfs_ok; | |
2888 | ||
8c10cbdb BH |
2889 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2890 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2891 | out: |
13cd2184 N |
2892 | if (fp) |
2893 | put_nfs4_file(fp); | |
37515177 N |
2894 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2895 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2896 | /* |
2897 | * To finish the open response, we just need to set the rflags. | |
2898 | */ | |
2899 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2900 | if (!open->op_stateowner->so_confirmed && |
2901 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2902 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2903 | ||
2904 | return status; | |
2905 | } | |
2906 | ||
b37ad28b | 2907 | __be32 |
b591480b BF |
2908 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2909 | clientid_t *clid) | |
1da177e4 LT |
2910 | { |
2911 | struct nfs4_client *clp; | |
b37ad28b | 2912 | __be32 status; |
1da177e4 LT |
2913 | |
2914 | nfs4_lock_state(); | |
2915 | dprintk("process_renew(%08x/%08x): starting\n", | |
2916 | clid->cl_boot, clid->cl_id); | |
2917 | status = nfserr_stale_clientid; | |
2918 | if (STALE_CLIENTID(clid)) | |
2919 | goto out; | |
2920 | clp = find_confirmed_client(clid); | |
2921 | status = nfserr_expired; | |
2922 | if (clp == NULL) { | |
2923 | /* We assume the client took too long to RENEW. */ | |
2924 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2925 | goto out; | |
2926 | } | |
2927 | renew_client(clp); | |
2928 | status = nfserr_cb_path_down; | |
ea1da636 | 2929 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 2930 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
2931 | goto out; |
2932 | status = nfs_ok; | |
2933 | out: | |
2934 | nfs4_unlock_state(); | |
2935 | return status; | |
2936 | } | |
2937 | ||
c47d832b | 2938 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
2939 | }; |
2940 | ||
a76b4319 | 2941 | static void |
af558e33 | 2942 | nfsd4_end_grace(void) |
a76b4319 N |
2943 | { |
2944 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2945 | nfsd4_recdir_purge_old(); |
af558e33 | 2946 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2947 | /* |
2948 | * Now that every NFSv4 client has had the chance to recover and | |
2949 | * to see the (possibly new, possibly shorter) lease time, we | |
2950 | * can safely set the next grace time to the current lease time: | |
2951 | */ | |
2952 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2953 | } |
2954 | ||
fd39ca9a | 2955 | static time_t |
1da177e4 LT |
2956 | nfs4_laundromat(void) |
2957 | { | |
2958 | struct nfs4_client *clp; | |
2959 | struct nfs4_stateowner *sop; | |
2960 | struct nfs4_delegation *dp; | |
2961 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
2962 | time_t cutoff = get_seconds() - nfsd4_lease; |
2963 | time_t t, clientid_val = nfsd4_lease; | |
2964 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
2965 | |
2966 | nfs4_lock_state(); | |
2967 | ||
2968 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2969 | if (locks_in_grace()) |
2970 | nfsd4_end_grace(); | |
36acb66b BH |
2971 | INIT_LIST_HEAD(&reaplist); |
2972 | spin_lock(&client_lock); | |
1da177e4 LT |
2973 | list_for_each_safe(pos, next, &client_lru) { |
2974 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2975 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2976 | t = clp->cl_time - cutoff; | |
2977 | if (clientid_val > t) | |
2978 | clientid_val = t; | |
2979 | break; | |
2980 | } | |
d7682988 BH |
2981 | if (atomic_read(&clp->cl_refcount)) { |
2982 | dprintk("NFSD: client in use (clientid %08x)\n", | |
2983 | clp->cl_clientid.cl_id); | |
2984 | continue; | |
2985 | } | |
2986 | unhash_client_locked(clp); | |
2987 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
2988 | } |
2989 | spin_unlock(&client_lock); | |
2990 | list_for_each_safe(pos, next, &reaplist) { | |
2991 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
2992 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
2993 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2994 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2995 | expire_client(clp); |
2996 | } | |
1da177e4 LT |
2997 | spin_lock(&recall_lock); |
2998 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2999 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3000 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3001 | u = dp->dl_time - cutoff; | |
3002 | if (test_val > u) | |
3003 | test_val = u; | |
3004 | break; | |
3005 | } | |
1da177e4 LT |
3006 | list_move(&dp->dl_recall_lru, &reaplist); |
3007 | } | |
3008 | spin_unlock(&recall_lock); | |
3009 | list_for_each_safe(pos, next, &reaplist) { | |
3010 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3011 | list_del_init(&dp->dl_recall_lru); | |
3012 | unhash_delegation(dp); | |
3013 | } | |
cf07d2ea | 3014 | test_val = nfsd4_lease; |
1da177e4 LT |
3015 | list_for_each_safe(pos, next, &close_lru) { |
3016 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
3017 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
3018 | u = sop->so_time - cutoff; | |
3019 | if (test_val > u) | |
3020 | test_val = u; | |
3021 | break; | |
3022 | } | |
3023 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
3024 | sop->so_id); | |
f044ff83 | 3025 | release_openowner(sop); |
1da177e4 LT |
3026 | } |
3027 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3028 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3029 | nfs4_unlock_state(); | |
3030 | return clientid_val; | |
3031 | } | |
3032 | ||
a254b246 HH |
3033 | static struct workqueue_struct *laundry_wq; |
3034 | static void laundromat_main(struct work_struct *); | |
3035 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3036 | ||
3037 | static void | |
c4028958 | 3038 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3039 | { |
3040 | time_t t; | |
3041 | ||
3042 | t = nfs4_laundromat(); | |
3043 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3044 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3045 | } |
3046 | ||
fd39ca9a | 3047 | static struct nfs4_stateowner * |
f8816512 N |
3048 | search_close_lru(u32 st_id, int flags) |
3049 | { | |
1da177e4 LT |
3050 | struct nfs4_stateowner *local = NULL; |
3051 | ||
1da177e4 LT |
3052 | if (flags & CLOSE_STATE) { |
3053 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
3054 | if (local->so_id == st_id) | |
3055 | return local; | |
3056 | } | |
3057 | } | |
3058 | return NULL; | |
3059 | } | |
3060 | ||
3061 | static inline int | |
3062 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
3063 | { | |
f9d7562f | 3064 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
3065 | } |
3066 | ||
3067 | static int | |
3068 | STALE_STATEID(stateid_t *stateid) | |
3069 | { | |
e4e83ea4 BF |
3070 | if (stateid->si_boot == boot_time) |
3071 | return 0; | |
3072 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3073 | STATEID_VAL(stateid)); |
e4e83ea4 | 3074 | return 1; |
1da177e4 LT |
3075 | } |
3076 | ||
3077 | static inline int | |
3078 | access_permit_read(unsigned long access_bmap) | |
3079 | { | |
3080 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3081 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3082 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3083 | } | |
3084 | ||
3085 | static inline int | |
3086 | access_permit_write(unsigned long access_bmap) | |
3087 | { | |
3088 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3089 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3090 | } | |
3091 | ||
3092 | static | |
b37ad28b | 3093 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 3094 | { |
b37ad28b | 3095 | __be32 status = nfserr_openmode; |
1da177e4 | 3096 | |
02921914 BF |
3097 | /* For lock stateid's, we test the parent open, not the lock: */ |
3098 | if (stp->st_openstp) | |
3099 | stp = stp->st_openstp; | |
1da177e4 LT |
3100 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3101 | goto out; | |
3102 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3103 | goto out; | |
3104 | status = nfs_ok; | |
3105 | out: | |
3106 | return status; | |
3107 | } | |
3108 | ||
b37ad28b | 3109 | static inline __be32 |
1da177e4 LT |
3110 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3111 | { | |
203a8c8e | 3112 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3113 | return nfs_ok; |
af558e33 | 3114 | else if (locks_in_grace()) { |
25985edc | 3115 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3116 | * conflicting state; so we must wait out the grace period. */ |
3117 | return nfserr_grace; | |
3118 | } else if (flags & WR_STATE) | |
3119 | return nfs4_share_conflict(current_fh, | |
3120 | NFS4_SHARE_DENY_WRITE); | |
3121 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3122 | return nfs4_share_conflict(current_fh, | |
3123 | NFS4_SHARE_DENY_READ); | |
3124 | } | |
3125 | ||
3126 | /* | |
3127 | * Allow READ/WRITE during grace period on recovered state only for files | |
3128 | * that are not able to provide mandatory locking. | |
3129 | */ | |
3130 | static inline int | |
18f82731 | 3131 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3132 | { |
203a8c8e | 3133 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3134 | } |
3135 | ||
6668958f | 3136 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 3137 | { |
6668958f AA |
3138 | /* |
3139 | * When sessions are used the stateid generation number is ignored | |
3140 | * when it is zero. | |
3141 | */ | |
3142 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
3143 | goto out; | |
3144 | ||
0836f587 BF |
3145 | /* If the client sends us a stateid from the future, it's buggy: */ |
3146 | if (in->si_generation > ref->si_generation) | |
3147 | return nfserr_bad_stateid; | |
3148 | /* | |
3149 | * The following, however, can happen. For example, if the | |
3150 | * client sends an open and some IO at the same time, the open | |
3151 | * may bump si_generation while the IO is still in flight. | |
3152 | * Thanks to hard links and renames, the client never knows what | |
3153 | * file an open will affect. So it could avoid that situation | |
3154 | * only by serializing all opens and IO from the same open | |
3155 | * owner. To recover from the old_stateid error, the client | |
3156 | * will just have to retry the IO: | |
3157 | */ | |
3158 | if (in->si_generation < ref->si_generation) | |
3159 | return nfserr_old_stateid; | |
6668958f | 3160 | out: |
0836f587 BF |
3161 | return nfs_ok; |
3162 | } | |
3163 | ||
3e633079 BF |
3164 | static int is_delegation_stateid(stateid_t *stateid) |
3165 | { | |
3166 | return stateid->si_fileid == 0; | |
3167 | } | |
3168 | ||
e1ca12df BS |
3169 | static int is_open_stateid(struct nfs4_stateid *stateid) |
3170 | { | |
3171 | return stateid->st_openstp == NULL; | |
3172 | } | |
3173 | ||
17456804 BS |
3174 | __be32 nfs4_validate_stateid(stateid_t *stateid, int flags) |
3175 | { | |
3176 | struct nfs4_stateid *stp = NULL; | |
3177 | __be32 status = nfserr_stale_stateid; | |
3178 | ||
3179 | if (STALE_STATEID(stateid)) | |
3180 | goto out; | |
3181 | ||
3182 | status = nfserr_expired; | |
3183 | stp = search_for_stateid(stateid); | |
3184 | if (!stp) | |
3185 | goto out; | |
3186 | status = nfserr_bad_stateid; | |
3187 | ||
3188 | if (!stp->st_stateowner->so_confirmed) | |
3189 | goto out; | |
3190 | ||
3191 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); | |
3192 | if (status) | |
3193 | goto out; | |
3194 | ||
3195 | status = nfs_ok; | |
3196 | out: | |
3197 | return status; | |
3198 | } | |
3199 | ||
1da177e4 LT |
3200 | /* |
3201 | * Checks for stateid operations | |
3202 | */ | |
b37ad28b | 3203 | __be32 |
dd453dfd BH |
3204 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3205 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
3206 | { |
3207 | struct nfs4_stateid *stp = NULL; | |
3208 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 3209 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3210 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3211 | __be32 status; |
1da177e4 | 3212 | |
1da177e4 LT |
3213 | if (filpp) |
3214 | *filpp = NULL; | |
3215 | ||
18f82731 | 3216 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3217 | return nfserr_grace; |
3218 | ||
6668958f AA |
3219 | if (nfsd4_has_session(cstate)) |
3220 | flags |= HAS_SESSION; | |
3221 | ||
1da177e4 LT |
3222 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3223 | return check_special_stateids(current_fh, stateid, flags); | |
3224 | ||
1da177e4 LT |
3225 | status = nfserr_stale_stateid; |
3226 | if (STALE_STATEID(stateid)) | |
3227 | goto out; | |
3228 | ||
33515142 BF |
3229 | /* |
3230 | * We assume that any stateid that has the current boot time, | |
3231 | * but that we can't find, is expired: | |
3232 | */ | |
3233 | status = nfserr_expired; | |
3e633079 | 3234 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 3235 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 3236 | if (!dp) |
1da177e4 | 3237 | goto out; |
6668958f AA |
3238 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
3239 | flags); | |
0c2a498f BF |
3240 | if (status) |
3241 | goto out; | |
dc9bf700 BF |
3242 | status = nfs4_check_delegmode(dp, flags); |
3243 | if (status) | |
3244 | goto out; | |
3245 | renew_client(dp->dl_client); | |
43b0178e | 3246 | if (filpp) { |
acfdf5c3 | 3247 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3248 | BUG_ON(!*filpp); |
3249 | } | |
1da177e4 | 3250 | } else { /* open or lock stateid */ |
a4455be0 | 3251 | stp = find_stateid(stateid, flags); |
e4e83ea4 | 3252 | if (!stp) |
1da177e4 | 3253 | goto out; |
33515142 | 3254 | status = nfserr_bad_stateid; |
6150ef0d | 3255 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
3256 | goto out; |
3257 | if (!stp->st_stateowner->so_confirmed) | |
3258 | goto out; | |
6668958f AA |
3259 | status = check_stateid_generation(stateid, &stp->st_stateid, |
3260 | flags); | |
0c2a498f BF |
3261 | if (status) |
3262 | goto out; | |
a4455be0 BF |
3263 | status = nfs4_check_openmode(stp, flags); |
3264 | if (status) | |
1da177e4 LT |
3265 | goto out; |
3266 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3267 | if (filpp) { |
3268 | if (flags & RD_STATE) | |
3269 | *filpp = find_readable_file(stp->st_file); | |
3270 | else | |
3271 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3272 | } |
1da177e4 LT |
3273 | } |
3274 | status = nfs_ok; | |
3275 | out: | |
3276 | return status; | |
3277 | } | |
3278 | ||
e1ca12df BS |
3279 | static __be32 |
3280 | nfsd4_free_delegation_stateid(stateid_t *stateid) | |
3281 | { | |
3282 | struct nfs4_delegation *dp = search_for_delegation(stateid); | |
3283 | if (dp) | |
3284 | return nfserr_locks_held; | |
3285 | return nfserr_bad_stateid; | |
3286 | } | |
3287 | ||
3288 | static __be32 | |
3289 | nfsd4_free_lock_stateid(struct nfs4_stateid *stp) | |
3290 | { | |
3291 | if (check_for_locks(stp->st_file, stp->st_stateowner)) | |
3292 | return nfserr_locks_held; | |
3293 | release_lock_stateid(stp); | |
3294 | return nfs_ok; | |
3295 | } | |
3296 | ||
17456804 BS |
3297 | /* |
3298 | * Test if the stateid is valid | |
3299 | */ | |
3300 | __be32 | |
3301 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3302 | struct nfsd4_test_stateid *test_stateid) | |
3303 | { | |
3304 | test_stateid->ts_has_session = nfsd4_has_session(cstate); | |
3305 | return nfs_ok; | |
3306 | } | |
3307 | ||
e1ca12df BS |
3308 | /* |
3309 | * Free a state id | |
3310 | */ | |
3311 | __be32 | |
3312 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3313 | struct nfsd4_free_stateid *free_stateid) | |
3314 | { | |
3315 | stateid_t *stateid = &free_stateid->fr_stateid; | |
3316 | struct nfs4_stateid *stp; | |
3317 | __be32 ret; | |
3318 | ||
3319 | nfs4_lock_state(); | |
3320 | if (is_delegation_stateid(stateid)) { | |
3321 | ret = nfsd4_free_delegation_stateid(stateid); | |
3322 | goto out; | |
3323 | } | |
3324 | ||
3325 | stp = search_for_stateid(stateid); | |
3326 | if (!stp) { | |
3327 | ret = nfserr_bad_stateid; | |
3328 | goto out; | |
3329 | } | |
3330 | if (stateid->si_generation != 0) { | |
3331 | if (stateid->si_generation < stp->st_stateid.si_generation) { | |
3332 | ret = nfserr_old_stateid; | |
3333 | goto out; | |
3334 | } | |
3335 | if (stateid->si_generation > stp->st_stateid.si_generation) { | |
3336 | ret = nfserr_bad_stateid; | |
3337 | goto out; | |
3338 | } | |
3339 | } | |
3340 | ||
3341 | if (is_open_stateid(stp)) { | |
3342 | ret = nfserr_locks_held; | |
3343 | goto out; | |
3344 | } else { | |
3345 | ret = nfsd4_free_lock_stateid(stp); | |
3346 | goto out; | |
3347 | } | |
3348 | ||
3349 | out: | |
3350 | nfs4_unlock_state(); | |
3351 | return ret; | |
3352 | } | |
3353 | ||
4c4cd222 N |
3354 | static inline int |
3355 | setlkflg (int type) | |
3356 | { | |
3357 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3358 | RD_STATE : WR_STATE; | |
3359 | } | |
1da177e4 LT |
3360 | |
3361 | /* | |
3362 | * Checks for sequence id mutating operations. | |
3363 | */ | |
b37ad28b | 3364 | static __be32 |
dd453dfd BH |
3365 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3366 | stateid_t *stateid, int flags, | |
3367 | struct nfs4_stateowner **sopp, | |
3368 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 3369 | { |
1da177e4 LT |
3370 | struct nfs4_stateid *stp; |
3371 | struct nfs4_stateowner *sop; | |
dd453dfd | 3372 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 3373 | __be32 status; |
1da177e4 | 3374 | |
8c10cbdb BH |
3375 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3376 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3377 | |
1da177e4 LT |
3378 | *stpp = NULL; |
3379 | *sopp = NULL; | |
3380 | ||
1da177e4 | 3381 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 3382 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 3383 | return nfserr_bad_stateid; |
1da177e4 LT |
3384 | } |
3385 | ||
1da177e4 | 3386 | if (STALE_STATEID(stateid)) |
3a4f98bb | 3387 | return nfserr_stale_stateid; |
6668958f AA |
3388 | |
3389 | if (nfsd4_has_session(cstate)) | |
3390 | flags |= HAS_SESSION; | |
3391 | ||
1da177e4 LT |
3392 | /* |
3393 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
3394 | * the confirmed flag is incorrecly set, or the generation | |
3395 | * number is incorrect. | |
1da177e4 | 3396 | */ |
f8816512 N |
3397 | stp = find_stateid(stateid, flags); |
3398 | if (stp == NULL) { | |
3399 | /* | |
3400 | * Also, we should make sure this isn't just the result of | |
3401 | * a replayed close: | |
3402 | */ | |
3403 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
33515142 | 3404 | /* It's not stale; let's assume it's expired: */ |
f8816512 | 3405 | if (sop == NULL) |
33515142 | 3406 | return nfserr_expired; |
f8816512 N |
3407 | *sopp = sop; |
3408 | goto check_replay; | |
3409 | } | |
1da177e4 | 3410 | |
39325bd0 BF |
3411 | *stpp = stp; |
3412 | *sopp = sop = stp->st_stateowner; | |
3413 | ||
4c4cd222 | 3414 | if (lock) { |
4c4cd222 | 3415 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 3416 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 3417 | int lkflg = 0; |
b37ad28b | 3418 | __be32 status; |
4c4cd222 N |
3419 | |
3420 | lkflg = setlkflg(lock->lk_type); | |
3421 | ||
3422 | if (lock->lk_is_new) { | |
599e0a22 BF |
3423 | if (!sop->so_is_open_owner) |
3424 | return nfserr_bad_stateid; | |
60adfc50 AA |
3425 | if (!(flags & HAS_SESSION) && |
3426 | !same_clid(&clp->cl_clientid, lockclid)) | |
3427 | return nfserr_bad_stateid; | |
599e0a22 BF |
3428 | /* stp is the open stateid */ |
3429 | status = nfs4_check_openmode(stp, lkflg); | |
3430 | if (status) | |
3431 | return status; | |
3432 | } else { | |
3433 | /* stp is the lock stateid */ | |
3434 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
3435 | if (status) | |
3436 | return status; | |
4c4cd222 | 3437 | } |
1da177e4 LT |
3438 | } |
3439 | ||
f3362737 | 3440 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 3441 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 3442 | return nfserr_bad_stateid; |
1da177e4 LT |
3443 | } |
3444 | ||
1da177e4 LT |
3445 | /* |
3446 | * We now validate the seqid and stateid generation numbers. | |
3447 | * For the moment, we ignore the possibility of | |
3448 | * generation number wraparound. | |
3449 | */ | |
6668958f | 3450 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
3451 | goto check_replay; |
3452 | ||
3a4f98bb | 3453 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 3454 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3455 | " unconfirmed stateowner!\n"); |
3456 | return nfserr_bad_stateid; | |
1da177e4 | 3457 | } |
3a4f98bb | 3458 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3459 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3460 | " confirmed yet!\n"); |
3461 | return nfserr_bad_stateid; | |
1da177e4 | 3462 | } |
6668958f | 3463 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
3464 | if (status) |
3465 | return status; | |
52fd004e | 3466 | renew_client(sop->so_client); |
3a4f98bb | 3467 | return nfs_ok; |
1da177e4 | 3468 | |
1da177e4 | 3469 | check_replay: |
bd9aac52 | 3470 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3471 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3472 | /* indicate replay to calling function */ |
a90b061c | 3473 | return nfserr_replay_me; |
1da177e4 | 3474 | } |
2fdada03 | 3475 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3476 | sop->so_seqid, seqid); |
3477 | *sopp = NULL; | |
3478 | return nfserr_bad_seqid; | |
1da177e4 LT |
3479 | } |
3480 | ||
b37ad28b | 3481 | __be32 |
ca364317 | 3482 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3483 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3484 | { |
b37ad28b | 3485 | __be32 status; |
1da177e4 LT |
3486 | struct nfs4_stateowner *sop; |
3487 | struct nfs4_stateid *stp; | |
3488 | ||
3489 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3490 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3491 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3492 | |
ca364317 | 3493 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3494 | if (status) |
3495 | return status; | |
1da177e4 LT |
3496 | |
3497 | nfs4_lock_state(); | |
3498 | ||
dd453dfd | 3499 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3500 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3501 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3502 | &oc->oc_stateowner, &stp, NULL))) |
3503 | goto out; | |
3504 | ||
3505 | sop = oc->oc_stateowner; | |
3506 | sop->so_confirmed = 1; | |
3507 | update_stateid(&stp->st_stateid); | |
3508 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3509 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3510 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
3511 | |
3512 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3513 | out: |
f2327d9a | 3514 | if (oc->oc_stateowner) { |
1da177e4 | 3515 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3516 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3517 | } |
1da177e4 LT |
3518 | nfs4_unlock_state(); |
3519 | return status; | |
3520 | } | |
3521 | ||
f197c271 | 3522 | static inline void nfs4_file_downgrade(struct nfs4_stateid *stp, unsigned int to_access) |
1da177e4 LT |
3523 | { |
3524 | int i; | |
f197c271 | 3525 | |
1da177e4 | 3526 | for (i = 1; i < 4; i++) { |
f197c271 BF |
3527 | if (test_bit(i, &stp->st_access_bmap) && !(i & to_access)) { |
3528 | nfs4_file_put_access(stp->st_file, i); | |
3529 | __clear_bit(i, &stp->st_access_bmap); | |
3530 | } | |
1da177e4 LT |
3531 | } |
3532 | } | |
3533 | ||
3534 | static void | |
3535 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3536 | { | |
3537 | int i; | |
3538 | for (i = 0; i < 4; i++) { | |
3539 | if ((i & deny) != i) | |
3540 | __clear_bit(i, bmap); | |
3541 | } | |
3542 | } | |
3543 | ||
b37ad28b | 3544 | __be32 |
ca364317 BF |
3545 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3546 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3547 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3548 | { |
b37ad28b | 3549 | __be32 status; |
1da177e4 | 3550 | struct nfs4_stateid *stp; |
1da177e4 LT |
3551 | |
3552 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3553 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3554 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3555 | |
d87a8ade | 3556 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3557 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3558 | return nfserr_inval; |
3559 | ||
3560 | nfs4_lock_state(); | |
dd453dfd | 3561 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3562 | od->od_seqid, |
1da177e4 | 3563 | &od->od_stateid, |
f3362737 | 3564 | OPEN_STATE, |
1da177e4 LT |
3565 | &od->od_stateowner, &stp, NULL))) |
3566 | goto out; | |
3567 | ||
3568 | status = nfserr_inval; | |
3569 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3570 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3571 | stp->st_access_bmap, od->od_share_access); | |
3572 | goto out; | |
3573 | } | |
3574 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3575 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3576 | stp->st_deny_bmap, od->od_share_deny); | |
3577 | goto out; | |
3578 | } | |
f197c271 | 3579 | nfs4_file_downgrade(stp, od->od_share_access); |
1da177e4 | 3580 | |
1da177e4 LT |
3581 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3582 | ||
3583 | update_stateid(&stp->st_stateid); | |
3584 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3585 | status = nfs_ok; | |
3586 | out: | |
f2327d9a | 3587 | if (od->od_stateowner) { |
1da177e4 | 3588 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3589 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3590 | } |
1da177e4 LT |
3591 | nfs4_unlock_state(); |
3592 | return status; | |
3593 | } | |
3594 | ||
3595 | /* | |
3596 | * nfs4_unlock_state() called after encode | |
3597 | */ | |
b37ad28b | 3598 | __be32 |
ca364317 | 3599 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3600 | struct nfsd4_close *close) |
1da177e4 | 3601 | { |
b37ad28b | 3602 | __be32 status; |
1da177e4 LT |
3603 | struct nfs4_stateid *stp; |
3604 | ||
3605 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3606 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3607 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3608 | |
3609 | nfs4_lock_state(); | |
3610 | /* check close_lru for replay */ | |
dd453dfd | 3611 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3612 | close->cl_seqid, |
1da177e4 | 3613 | &close->cl_stateid, |
f3362737 | 3614 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3615 | &close->cl_stateowner, &stp, NULL))) |
3616 | goto out; | |
1da177e4 LT |
3617 | status = nfs_ok; |
3618 | update_stateid(&stp->st_stateid); | |
3619 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3620 | ||
04ef5954 | 3621 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3622 | release_open_stateid(stp); |
04ef5954 BF |
3623 | |
3624 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3625 | * released by the laundromat service after the lease period | |
3626 | * to enable us to handle CLOSE replay | |
3627 | */ | |
3628 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3629 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3630 | out: |
f2327d9a | 3631 | if (close->cl_stateowner) { |
1da177e4 | 3632 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3633 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3634 | } |
1da177e4 LT |
3635 | nfs4_unlock_state(); |
3636 | return status; | |
3637 | } | |
3638 | ||
b37ad28b | 3639 | __be32 |
ca364317 BF |
3640 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3641 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3642 | { |
203a8c8e BF |
3643 | struct nfs4_delegation *dp; |
3644 | stateid_t *stateid = &dr->dr_stateid; | |
3645 | struct inode *inode; | |
b37ad28b | 3646 | __be32 status; |
6668958f | 3647 | int flags = 0; |
1da177e4 | 3648 | |
ca364317 | 3649 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3650 | return status; |
3651 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3652 | |
6668958f AA |
3653 | if (nfsd4_has_session(cstate)) |
3654 | flags |= HAS_SESSION; | |
1da177e4 | 3655 | nfs4_lock_state(); |
203a8c8e BF |
3656 | status = nfserr_bad_stateid; |
3657 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3658 | goto out; | |
3659 | status = nfserr_stale_stateid; | |
3660 | if (STALE_STATEID(stateid)) | |
3661 | goto out; | |
7e0f7cf5 | 3662 | status = nfserr_bad_stateid; |
203a8c8e BF |
3663 | if (!is_delegation_stateid(stateid)) |
3664 | goto out; | |
33515142 | 3665 | status = nfserr_expired; |
203a8c8e | 3666 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3667 | if (!dp) |
203a8c8e | 3668 | goto out; |
6668958f | 3669 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3670 | if (status) |
3671 | goto out; | |
3672 | renew_client(dp->dl_client); | |
3673 | ||
3674 | unhash_delegation(dp); | |
1da177e4 | 3675 | out: |
203a8c8e BF |
3676 | nfs4_unlock_state(); |
3677 | ||
1da177e4 LT |
3678 | return status; |
3679 | } | |
3680 | ||
3681 | ||
3682 | /* | |
3683 | * Lock owner state (byte-range locks) | |
3684 | */ | |
3685 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3686 | #define LOCK_HASH_BITS 8 | |
3687 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3688 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3689 | ||
87df4de8 BH |
3690 | static inline u64 |
3691 | end_offset(u64 start, u64 len) | |
3692 | { | |
3693 | u64 end; | |
3694 | ||
3695 | end = start + len; | |
3696 | return end >= start ? end: NFS4_MAX_UINT64; | |
3697 | } | |
3698 | ||
3699 | /* last octet in a range */ | |
3700 | static inline u64 | |
3701 | last_byte_offset(u64 start, u64 len) | |
3702 | { | |
3703 | u64 end; | |
3704 | ||
3705 | BUG_ON(!len); | |
3706 | end = start + len; | |
3707 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3708 | } | |
3709 | ||
1da177e4 LT |
3710 | #define lockownerid_hashval(id) \ |
3711 | ((id) & LOCK_HASH_MASK) | |
3712 | ||
3713 | static inline unsigned int | |
3714 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3715 | struct xdr_netobj *ownername) | |
3716 | { | |
3717 | return (file_hashval(inode) + cl_id | |
3718 | + opaque_hashval(ownername->data, ownername->len)) | |
3719 | & LOCK_HASH_MASK; | |
3720 | } | |
3721 | ||
3722 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3723 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3724 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3725 | ||
e1ca12df BS |
3726 | static int |
3727 | same_stateid(stateid_t *id_one, stateid_t *id_two) | |
3728 | { | |
3729 | if (id_one->si_stateownerid != id_two->si_stateownerid) | |
3730 | return 0; | |
3731 | return id_one->si_fileid == id_two->si_fileid; | |
3732 | } | |
3733 | ||
fd39ca9a | 3734 | static struct nfs4_stateid * |
1da177e4 LT |
3735 | find_stateid(stateid_t *stid, int flags) |
3736 | { | |
9346eff0 | 3737 | struct nfs4_stateid *local; |
1da177e4 LT |
3738 | u32 st_id = stid->si_stateownerid; |
3739 | u32 f_id = stid->si_fileid; | |
3740 | unsigned int hashval; | |
3741 | ||
3742 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3743 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3744 | hashval = stateid_hashval(st_id, f_id); |
3745 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3746 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3747 | (local->st_stateid.si_fileid == f_id)) | |
3748 | return local; | |
3749 | } | |
3750 | } | |
9346eff0 KK |
3751 | |
3752 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3753 | hashval = stateid_hashval(st_id, f_id); |
3754 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3755 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3756 | (local->st_stateid.si_fileid == f_id)) | |
3757 | return local; | |
3758 | } | |
849823c5 | 3759 | } |
1da177e4 LT |
3760 | return NULL; |
3761 | } | |
3762 | ||
e1ca12df BS |
3763 | static struct nfs4_stateid * |
3764 | search_for_stateid(stateid_t *stid) | |
3765 | { | |
3766 | struct nfs4_stateid *local; | |
3767 | unsigned int hashval = stateid_hashval(stid->si_stateownerid, stid->si_fileid); | |
3768 | ||
3769 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3770 | if (same_stateid(&local->st_stateid, stid)) | |
3771 | return local; | |
3772 | } | |
3773 | ||
3774 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3775 | if (same_stateid(&local->st_stateid, stid)) | |
3776 | return local; | |
3777 | } | |
3778 | return NULL; | |
3779 | } | |
3780 | ||
3781 | static struct nfs4_delegation * | |
3782 | search_for_delegation(stateid_t *stid) | |
3783 | { | |
3784 | struct nfs4_file *fp; | |
3785 | struct nfs4_delegation *dp; | |
3786 | struct list_head *pos; | |
3787 | int i; | |
3788 | ||
3789 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3790 | list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { | |
3791 | list_for_each(pos, &fp->fi_delegations) { | |
3792 | dp = list_entry(pos, struct nfs4_delegation, dl_perfile); | |
3793 | if (same_stateid(&dp->dl_stateid, stid)) | |
3794 | return dp; | |
3795 | } | |
3796 | } | |
3797 | } | |
3798 | return NULL; | |
3799 | } | |
3800 | ||
1da177e4 LT |
3801 | static struct nfs4_delegation * |
3802 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3803 | { | |
13cd2184 N |
3804 | struct nfs4_file *fp; |
3805 | struct nfs4_delegation *dl; | |
1da177e4 | 3806 | |
8c10cbdb BH |
3807 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3808 | STATEID_VAL(stid)); | |
1da177e4 | 3809 | |
1da177e4 | 3810 | fp = find_file(ino); |
13cd2184 N |
3811 | if (!fp) |
3812 | return NULL; | |
3813 | dl = find_delegation_file(fp, stid); | |
3814 | put_nfs4_file(fp); | |
3815 | return dl; | |
1da177e4 LT |
3816 | } |
3817 | ||
3818 | /* | |
3819 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3820 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3821 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3822 | * locking, this prevents us from being completely protocol-compliant. The | |
3823 | * real solution to this problem is to start using unsigned file offsets in | |
3824 | * the VFS, but this is a very deep change! | |
3825 | */ | |
3826 | static inline void | |
3827 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3828 | { | |
3829 | if (lock->fl_start < 0) | |
3830 | lock->fl_start = OFFSET_MAX; | |
3831 | if (lock->fl_end < 0) | |
3832 | lock->fl_end = OFFSET_MAX; | |
3833 | } | |
3834 | ||
d5b9026a N |
3835 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3836 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3837 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3838 | }; |
1da177e4 LT |
3839 | |
3840 | static inline void | |
3841 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3842 | { | |
d5b9026a | 3843 | struct nfs4_stateowner *sop; |
1da177e4 | 3844 | |
d5b9026a N |
3845 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3846 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
1da177e4 LT |
3847 | kref_get(&sop->so_ref); |
3848 | deny->ld_sop = sop; | |
3849 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3850 | } else { |
3851 | deny->ld_sop = NULL; | |
3852 | deny->ld_clientid.cl_boot = 0; | |
3853 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3854 | } |
3855 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3856 | deny->ld_length = NFS4_MAX_UINT64; |
3857 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3858 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3859 | deny->ld_type = NFS4_READ_LT; | |
3860 | if (fl->fl_type != F_RDLCK) | |
3861 | deny->ld_type = NFS4_WRITE_LT; | |
3862 | } | |
3863 | ||
1da177e4 LT |
3864 | static struct nfs4_stateowner * |
3865 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3866 | struct xdr_netobj *owner) | |
3867 | { | |
3868 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3869 | struct nfs4_stateowner *op; | |
3870 | ||
3871 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3872 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3873 | return op; |
3874 | } | |
3875 | return NULL; | |
3876 | } | |
3877 | ||
3878 | /* | |
3879 | * Alloc a lock owner structure. | |
3880 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3881 | * occurred. |
1da177e4 LT |
3882 | * |
3883 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3884 | */ |
3885 | ||
3886 | static struct nfs4_stateowner * | |
3887 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3888 | struct nfs4_stateowner *sop; | |
3889 | struct nfs4_replay *rp; | |
3890 | unsigned int idhashval; | |
3891 | ||
3892 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3893 | return NULL; | |
3894 | idhashval = lockownerid_hashval(current_ownerid); | |
3895 | INIT_LIST_HEAD(&sop->so_idhash); | |
3896 | INIT_LIST_HEAD(&sop->so_strhash); | |
3897 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3898 | INIT_LIST_HEAD(&sop->so_stateids); |
3899 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3900 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3901 | sop->so_time = 0; | |
3902 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3903 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3904 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3905 | sop->so_is_open_owner = 0; |
3906 | sop->so_id = current_ownerid++; | |
3907 | sop->so_client = clp; | |
b59e3c0e NB |
3908 | /* It is the openowner seqid that will be incremented in encode in the |
3909 | * case of new lockowners; so increment the lock seqid manually: */ | |
3910 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3911 | sop->so_confirmed = 1; |
3912 | rp = &sop->so_replay; | |
de1ae286 | 3913 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3914 | rp->rp_buflen = 0; |
3915 | rp->rp_buf = rp->rp_ibuf; | |
3916 | return sop; | |
3917 | } | |
3918 | ||
fd39ca9a | 3919 | static struct nfs4_stateid * |
1da177e4 LT |
3920 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3921 | { | |
3922 | struct nfs4_stateid *stp; | |
3923 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3924 | ||
5ac049ac N |
3925 | stp = nfs4_alloc_stateid(); |
3926 | if (stp == NULL) | |
1da177e4 LT |
3927 | goto out; |
3928 | INIT_LIST_HEAD(&stp->st_hash); | |
3929 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3930 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3931 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3932 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3933 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3934 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3935 | stp->st_stateowner = sop; |
13cd2184 | 3936 | get_nfs4_file(fp); |
1da177e4 | 3937 | stp->st_file = fp; |
e4e83ea4 | 3938 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
3939 | stp->st_stateid.si_stateownerid = sop->so_id; |
3940 | stp->st_stateid.si_fileid = fp->fi_id; | |
3941 | stp->st_stateid.si_generation = 0; | |
0997b173 | 3942 | stp->st_access_bmap = 0; |
1da177e4 | 3943 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3944 | stp->st_openstp = open_stp; |
1da177e4 LT |
3945 | |
3946 | out: | |
3947 | return stp; | |
3948 | } | |
3949 | ||
fd39ca9a | 3950 | static int |
1da177e4 LT |
3951 | check_lock_length(u64 offset, u64 length) |
3952 | { | |
87df4de8 | 3953 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3954 | LOFF_OVERFLOW(offset, length))); |
3955 | } | |
3956 | ||
0997b173 BF |
3957 | static void get_lock_access(struct nfs4_stateid *lock_stp, u32 access) |
3958 | { | |
3959 | struct nfs4_file *fp = lock_stp->st_file; | |
3960 | int oflag = nfs4_access_to_omode(access); | |
3961 | ||
3962 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3963 | return; | |
3964 | nfs4_file_get_access(fp, oflag); | |
3965 | __set_bit(access, &lock_stp->st_access_bmap); | |
3966 | } | |
3967 | ||
1da177e4 LT |
3968 | /* |
3969 | * LOCK operation | |
3970 | */ | |
b37ad28b | 3971 | __be32 |
ca364317 | 3972 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3973 | struct nfsd4_lock *lock) |
1da177e4 | 3974 | { |
3e9e3dbe | 3975 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3976 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 | 3977 | struct nfs4_stateid *lock_stp; |
7d947842 BF |
3978 | struct nfs4_file *fp; |
3979 | struct file *filp = NULL; | |
1da177e4 | 3980 | struct file_lock file_lock; |
8dc7c311 | 3981 | struct file_lock conflock; |
b37ad28b | 3982 | __be32 status = 0; |
1da177e4 | 3983 | unsigned int strhashval; |
b8dd7b9a | 3984 | int err; |
1da177e4 LT |
3985 | |
3986 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3987 | (long long) lock->lk_offset, | |
3988 | (long long) lock->lk_length); | |
3989 | ||
1da177e4 LT |
3990 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3991 | return nfserr_inval; | |
3992 | ||
ca364317 | 3993 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3994 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3995 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3996 | return status; | |
3997 | } | |
3998 | ||
1da177e4 LT |
3999 | nfs4_lock_state(); |
4000 | ||
4001 | if (lock->lk_is_new) { | |
893f8770 N |
4002 | /* |
4003 | * Client indicates that this is a new lockowner. | |
4004 | * Use open owner and open stateid to create lock owner and | |
4005 | * lock stateid. | |
4006 | */ | |
1da177e4 | 4007 | struct nfs4_stateid *open_stp = NULL; |
1da177e4 LT |
4008 | |
4009 | status = nfserr_stale_clientid; | |
60adfc50 AA |
4010 | if (!nfsd4_has_session(cstate) && |
4011 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 4012 | goto out; |
1da177e4 | 4013 | |
1da177e4 | 4014 | /* validate and update open stateid and open seqid */ |
dd453dfd | 4015 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
4016 | lock->lk_new_open_seqid, |
4017 | &lock->lk_new_open_stateid, | |
f3362737 | 4018 | OPEN_STATE, |
3a65588a | 4019 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 4020 | lock); |
37515177 | 4021 | if (status) |
1da177e4 | 4022 | goto out; |
3a65588a | 4023 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
4024 | /* create lockowner and lock stateid */ |
4025 | fp = open_stp->st_file; | |
4026 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
4027 | open_sop->so_client->cl_clientid.cl_id, | |
4028 | &lock->v.new.owner); | |
3e9e3dbe N |
4029 | /* XXX: Do we need to check for duplicate stateowners on |
4030 | * the same file, or should they just be allowed (and | |
4031 | * create new stateids)? */ | |
1da177e4 | 4032 | status = nfserr_resource; |
b59e3c0e NB |
4033 | lock_sop = alloc_init_lock_stateowner(strhashval, |
4034 | open_sop->so_client, open_stp, lock); | |
4035 | if (lock_sop == NULL) | |
1da177e4 | 4036 | goto out; |
b59e3c0e | 4037 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 4038 | if (lock_stp == NULL) |
1da177e4 | 4039 | goto out; |
1da177e4 LT |
4040 | } else { |
4041 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 4042 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
4043 | lock->lk_old_lock_seqid, |
4044 | &lock->lk_old_lock_stateid, | |
f3362737 | 4045 | LOCK_STATE, |
3a65588a | 4046 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
4047 | if (status) |
4048 | goto out; | |
3a65588a | 4049 | lock_sop = lock->lk_replay_owner; |
7d947842 | 4050 | fp = lock_stp->st_file; |
1da177e4 | 4051 | } |
3a65588a | 4052 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 | 4053 | |
0dd395dc | 4054 | status = nfserr_grace; |
af558e33 | 4055 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4056 | goto out; |
4057 | status = nfserr_no_grace; | |
af558e33 | 4058 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4059 | goto out; |
4060 | ||
1da177e4 LT |
4061 | locks_init_lock(&file_lock); |
4062 | switch (lock->lk_type) { | |
4063 | case NFS4_READ_LT: | |
4064 | case NFS4_READW_LT: | |
0997b173 BF |
4065 | filp = find_readable_file(lock_stp->st_file); |
4066 | if (filp) | |
4067 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4068 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4069 | break; |
1da177e4 LT |
4070 | case NFS4_WRITE_LT: |
4071 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4072 | filp = find_writeable_file(lock_stp->st_file); |
4073 | if (filp) | |
4074 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4075 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4076 | break; |
1da177e4 LT |
4077 | default: |
4078 | status = nfserr_inval; | |
4079 | goto out; | |
4080 | } | |
f9d7562f BF |
4081 | if (!filp) { |
4082 | status = nfserr_openmode; | |
4083 | goto out; | |
4084 | } | |
b59e3c0e | 4085 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4086 | file_lock.fl_pid = current->tgid; |
4087 | file_lock.fl_file = filp; | |
4088 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4089 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4090 | |
4091 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4092 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4093 | nfs4_transform_lock_offset(&file_lock); |
4094 | ||
4095 | /* | |
4096 | * Try to lock the file in the VFS. | |
4097 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4098 | */ | |
4099 | ||
529d7b2a | 4100 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4101 | switch (-err) { |
1da177e4 LT |
4102 | case 0: /* success! */ |
4103 | update_stateid(&lock_stp->st_stateid); | |
4104 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
4105 | sizeof(stateid_t)); | |
b8dd7b9a | 4106 | status = 0; |
eb76b3fd AA |
4107 | break; |
4108 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4109 | status = nfserr_denied; | |
4110 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4111 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4112 | break; | |
1da177e4 LT |
4113 | case (EDEADLK): |
4114 | status = nfserr_deadlock; | |
eb76b3fd | 4115 | break; |
1da177e4 | 4116 | default: |
fd85b817 | 4117 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
4118 | status = nfserr_resource; |
4119 | break; | |
1da177e4 | 4120 | } |
1da177e4 | 4121 | out: |
8a280510 | 4122 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 4123 | release_lockowner(lock_sop); |
3a65588a BF |
4124 | if (lock->lk_replay_owner) { |
4125 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 4126 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 4127 | } |
1da177e4 LT |
4128 | nfs4_unlock_state(); |
4129 | return status; | |
4130 | } | |
4131 | ||
55ef1274 BF |
4132 | /* |
4133 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4134 | * so we do a temporary open here just to get an open file to pass to | |
4135 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4136 | * inode operation.) | |
4137 | */ | |
4138 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4139 | { | |
4140 | struct file *file; | |
4141 | int err; | |
4142 | ||
4143 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4144 | if (err) | |
4145 | return err; | |
4146 | err = vfs_test_lock(file, lock); | |
4147 | nfsd_close(file); | |
4148 | return err; | |
4149 | } | |
4150 | ||
1da177e4 LT |
4151 | /* |
4152 | * LOCKT operation | |
4153 | */ | |
b37ad28b | 4154 | __be32 |
ca364317 BF |
4155 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4156 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4157 | { |
4158 | struct inode *inode; | |
1da177e4 | 4159 | struct file_lock file_lock; |
fd85b817 | 4160 | int error; |
b37ad28b | 4161 | __be32 status; |
1da177e4 | 4162 | |
af558e33 | 4163 | if (locks_in_grace()) |
1da177e4 LT |
4164 | return nfserr_grace; |
4165 | ||
4166 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4167 | return nfserr_inval; | |
4168 | ||
4169 | lockt->lt_stateowner = NULL; | |
4170 | nfs4_lock_state(); | |
4171 | ||
4172 | status = nfserr_stale_clientid; | |
60adfc50 | 4173 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4174 | goto out; |
1da177e4 | 4175 | |
ca364317 | 4176 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 4177 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
4178 | if (status == nfserr_symlink) |
4179 | status = nfserr_inval; | |
4180 | goto out; | |
4181 | } | |
4182 | ||
ca364317 | 4183 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4184 | locks_init_lock(&file_lock); |
4185 | switch (lockt->lt_type) { | |
4186 | case NFS4_READ_LT: | |
4187 | case NFS4_READW_LT: | |
4188 | file_lock.fl_type = F_RDLCK; | |
4189 | break; | |
4190 | case NFS4_WRITE_LT: | |
4191 | case NFS4_WRITEW_LT: | |
4192 | file_lock.fl_type = F_WRLCK; | |
4193 | break; | |
4194 | default: | |
2fdada03 | 4195 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4196 | status = nfserr_inval; |
4197 | goto out; | |
4198 | } | |
4199 | ||
4200 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
4201 | &lockt->lt_clientid, &lockt->lt_owner); | |
4202 | if (lockt->lt_stateowner) | |
4203 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
4204 | file_lock.fl_pid = current->tgid; | |
4205 | file_lock.fl_flags = FL_POSIX; | |
4206 | ||
4207 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4208 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4209 | |
4210 | nfs4_transform_lock_offset(&file_lock); | |
4211 | ||
1da177e4 | 4212 | status = nfs_ok; |
55ef1274 | 4213 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4214 | if (error) { |
4215 | status = nfserrno(error); | |
4216 | goto out; | |
4217 | } | |
9d6a8c5c | 4218 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4219 | status = nfserr_denied; |
9d6a8c5c | 4220 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4221 | } |
4222 | out: | |
4223 | nfs4_unlock_state(); | |
4224 | return status; | |
4225 | } | |
4226 | ||
b37ad28b | 4227 | __be32 |
ca364317 | 4228 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4229 | struct nfsd4_locku *locku) |
1da177e4 LT |
4230 | { |
4231 | struct nfs4_stateid *stp; | |
4232 | struct file *filp = NULL; | |
4233 | struct file_lock file_lock; | |
b37ad28b | 4234 | __be32 status; |
b8dd7b9a | 4235 | int err; |
1da177e4 LT |
4236 | |
4237 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4238 | (long long) locku->lu_offset, | |
4239 | (long long) locku->lu_length); | |
4240 | ||
4241 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4242 | return nfserr_inval; | |
4243 | ||
4244 | nfs4_lock_state(); | |
4245 | ||
dd453dfd | 4246 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
4247 | locku->lu_seqid, |
4248 | &locku->lu_stateid, | |
f3362737 | 4249 | LOCK_STATE, |
1da177e4 LT |
4250 | &locku->lu_stateowner, &stp, NULL))) |
4251 | goto out; | |
4252 | ||
f9d7562f BF |
4253 | filp = find_any_file(stp->st_file); |
4254 | if (!filp) { | |
4255 | status = nfserr_lock_range; | |
4256 | goto out; | |
4257 | } | |
1da177e4 LT |
4258 | BUG_ON(!filp); |
4259 | locks_init_lock(&file_lock); | |
4260 | file_lock.fl_type = F_UNLCK; | |
4261 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
4262 | file_lock.fl_pid = current->tgid; | |
4263 | file_lock.fl_file = filp; | |
4264 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4265 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4266 | file_lock.fl_start = locku->lu_offset; |
4267 | ||
87df4de8 | 4268 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4269 | nfs4_transform_lock_offset(&file_lock); |
4270 | ||
4271 | /* | |
4272 | * Try to unlock the file in the VFS. | |
4273 | */ | |
fd85b817 | 4274 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4275 | if (err) { |
fd85b817 | 4276 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4277 | goto out_nfserr; |
4278 | } | |
4279 | /* | |
4280 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4281 | */ | |
4282 | update_stateid(&stp->st_stateid); | |
4283 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
4284 | ||
4285 | out: | |
f2327d9a | 4286 | if (locku->lu_stateowner) { |
1da177e4 | 4287 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 4288 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 4289 | } |
1da177e4 LT |
4290 | nfs4_unlock_state(); |
4291 | return status; | |
4292 | ||
4293 | out_nfserr: | |
b8dd7b9a | 4294 | status = nfserrno(err); |
1da177e4 LT |
4295 | goto out; |
4296 | } | |
4297 | ||
4298 | /* | |
4299 | * returns | |
4300 | * 1: locks held by lockowner | |
4301 | * 0: no locks held by lockowner | |
4302 | */ | |
4303 | static int | |
f9d7562f | 4304 | check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner) |
1da177e4 LT |
4305 | { |
4306 | struct file_lock **flpp; | |
f9d7562f | 4307 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4308 | int status = 0; |
4309 | ||
b89f4321 | 4310 | lock_flocks(); |
1da177e4 | 4311 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4312 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4313 | status = 1; |
4314 | goto out; | |
796dadfd | 4315 | } |
1da177e4 LT |
4316 | } |
4317 | out: | |
b89f4321 | 4318 | unlock_flocks(); |
1da177e4 LT |
4319 | return status; |
4320 | } | |
4321 | ||
b37ad28b | 4322 | __be32 |
b591480b BF |
4323 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4324 | struct nfsd4_compound_state *cstate, | |
4325 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4326 | { |
4327 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
4328 | struct nfs4_stateowner *sop; |
4329 | struct nfs4_stateid *stp; | |
1da177e4 | 4330 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4331 | struct list_head matches; |
4332 | int i; | |
b37ad28b | 4333 | __be32 status; |
1da177e4 LT |
4334 | |
4335 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4336 | clid->cl_boot, clid->cl_id); | |
4337 | ||
4338 | /* XXX check for lease expiration */ | |
4339 | ||
4340 | status = nfserr_stale_clientid; | |
849823c5 | 4341 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4342 | return status; |
1da177e4 LT |
4343 | |
4344 | nfs4_lock_state(); | |
4345 | ||
3e9e3dbe N |
4346 | status = nfserr_locks_held; |
4347 | /* XXX: we're doing a linear search through all the lockowners. | |
4348 | * Yipes! For now we'll just hope clients aren't really using | |
4349 | * release_lockowner much, but eventually we have to fix these | |
4350 | * data structures. */ | |
4351 | INIT_LIST_HEAD(&matches); | |
4352 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4353 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 4354 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4355 | continue; |
4356 | list_for_each_entry(stp, &sop->so_stateids, | |
4357 | st_perstateowner) { | |
f9d7562f | 4358 | if (check_for_locks(stp->st_file, sop)) |
3e9e3dbe N |
4359 | goto out; |
4360 | /* Note: so_perclient unused for lockowners, | |
4361 | * so it's OK to fool with here. */ | |
4362 | list_add(&sop->so_perclient, &matches); | |
4363 | } | |
1da177e4 | 4364 | } |
3e9e3dbe N |
4365 | } |
4366 | /* Clients probably won't expect us to return with some (but not all) | |
4367 | * of the lockowner state released; so don't release any until all | |
4368 | * have been checked. */ | |
4369 | status = nfs_ok; | |
0fa822e4 N |
4370 | while (!list_empty(&matches)) { |
4371 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
4372 | so_perclient); | |
4373 | /* unhash_stateowner deletes so_perclient only | |
4374 | * for openowners. */ | |
4375 | list_del(&sop->so_perclient); | |
f044ff83 | 4376 | release_lockowner(sop); |
1da177e4 LT |
4377 | } |
4378 | out: | |
4379 | nfs4_unlock_state(); | |
4380 | return status; | |
4381 | } | |
4382 | ||
4383 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4384 | alloc_reclaim(void) |
1da177e4 | 4385 | { |
a55370a3 | 4386 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4387 | } |
4388 | ||
c7b9a459 | 4389 | int |
a1bcecd2 | 4390 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4391 | { |
4392 | unsigned int strhashval = clientstr_hashval(name); | |
4393 | struct nfs4_client *clp; | |
4394 | ||
e203d506 | 4395 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4396 | return clp ? 1 : 0; |
4397 | } | |
4398 | ||
1da177e4 LT |
4399 | /* |
4400 | * failure => all reset bets are off, nfserr_no_grace... | |
4401 | */ | |
190e4fbf N |
4402 | int |
4403 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4404 | { |
4405 | unsigned int strhashval; | |
4406 | struct nfs4_client_reclaim *crp = NULL; | |
4407 | ||
a55370a3 N |
4408 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4409 | crp = alloc_reclaim(); | |
1da177e4 LT |
4410 | if (!crp) |
4411 | return 0; | |
a55370a3 | 4412 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4413 | INIT_LIST_HEAD(&crp->cr_strhash); |
4414 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4415 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4416 | reclaim_str_hashtbl_size++; |
4417 | return 1; | |
4418 | } | |
4419 | ||
4420 | static void | |
4421 | nfs4_release_reclaim(void) | |
4422 | { | |
4423 | struct nfs4_client_reclaim *crp = NULL; | |
4424 | int i; | |
4425 | ||
1da177e4 LT |
4426 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4427 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4428 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4429 | struct nfs4_client_reclaim, cr_strhash); | |
4430 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4431 | kfree(crp); |
4432 | reclaim_str_hashtbl_size--; | |
4433 | } | |
4434 | } | |
4435 | BUG_ON(reclaim_str_hashtbl_size); | |
4436 | } | |
4437 | ||
4438 | /* | |
4439 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4440 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4441 | nfs4_find_reclaim_client(clientid_t *clid) |
4442 | { | |
4443 | unsigned int strhashval; | |
4444 | struct nfs4_client *clp; | |
4445 | struct nfs4_client_reclaim *crp = NULL; | |
4446 | ||
4447 | ||
4448 | /* find clientid in conf_id_hashtbl */ | |
4449 | clp = find_confirmed_client(clid); | |
4450 | if (clp == NULL) | |
4451 | return NULL; | |
4452 | ||
a55370a3 N |
4453 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4454 | clp->cl_name.len, clp->cl_name.data, | |
4455 | clp->cl_recdir); | |
1da177e4 LT |
4456 | |
4457 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4458 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4459 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4460 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4461 | return crp; |
4462 | } | |
4463 | } | |
4464 | return NULL; | |
4465 | } | |
4466 | ||
4467 | /* | |
4468 | * Called from OPEN. Look for clientid in reclaim list. | |
4469 | */ | |
b37ad28b | 4470 | __be32 |
1da177e4 LT |
4471 | nfs4_check_open_reclaim(clientid_t *clid) |
4472 | { | |
dfc83565 | 4473 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4474 | } |
4475 | ||
ac4d8ff2 | 4476 | /* initialization to perform at module load time: */ |
1da177e4 | 4477 | |
e8ff2a84 | 4478 | int |
ac4d8ff2 | 4479 | nfs4_state_init(void) |
1da177e4 | 4480 | { |
e8ff2a84 | 4481 | int i, status; |
1da177e4 | 4482 | |
e8ff2a84 BF |
4483 | status = nfsd4_init_slabs(); |
4484 | if (status) | |
4485 | return status; | |
1da177e4 LT |
4486 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4487 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4488 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4489 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4490 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4491 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4492 | } |
5282fd72 ME |
4493 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4494 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4495 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4496 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4497 | } | |
4498 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
4499 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
4500 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
4501 | } | |
4502 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
4503 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
4504 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
4505 | } | |
4506 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4507 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4508 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4509 | } | |
1da177e4 | 4510 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4511 | INIT_LIST_HEAD(&close_lru); |
4512 | INIT_LIST_HEAD(&client_lru); | |
4513 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4514 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4515 | return 0; |
ac4d8ff2 N |
4516 | } |
4517 | ||
190e4fbf N |
4518 | static void |
4519 | nfsd4_load_reboot_recovery_data(void) | |
4520 | { | |
4521 | int status; | |
4522 | ||
0964a3d3 N |
4523 | nfs4_lock_state(); |
4524 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 4525 | status = nfsd4_recdir_load(); |
0964a3d3 | 4526 | nfs4_unlock_state(); |
190e4fbf N |
4527 | if (status) |
4528 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4529 | } | |
4530 | ||
c2f1a551 MS |
4531 | /* |
4532 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4533 | * client may quite reasonably hang on to a delegation as long as it has | |
4534 | * the inode cached. This becomes an obvious problem the first time a | |
4535 | * client's inode cache approaches the size of the server's total memory. | |
4536 | * | |
4537 | * For now we avoid this problem by imposing a hard limit on the number | |
4538 | * of delegations, which varies according to the server's memory size. | |
4539 | */ | |
4540 | static void | |
4541 | set_max_delegations(void) | |
4542 | { | |
4543 | /* | |
4544 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4545 | * estimates suggest that in the worst case (where every delegation | |
4546 | * is for a different inode), a delegation could take about 1.5K, | |
4547 | * giving a worst case usage of about 6% of memory. | |
4548 | */ | |
4549 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4550 | } | |
4551 | ||
ac4d8ff2 N |
4552 | /* initialization to perform when the nfsd service is started: */ |
4553 | ||
29ab23cc | 4554 | static int |
ac4d8ff2 N |
4555 | __nfs4_state_start(void) |
4556 | { | |
b5a1a81e BF |
4557 | int ret; |
4558 | ||
1da177e4 | 4559 | boot_time = get_seconds(); |
af558e33 | 4560 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4561 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4562 | nfsd4_grace); |
b5a1a81e BF |
4563 | ret = set_callback_cred(); |
4564 | if (ret) | |
4565 | return -ENOMEM; | |
58da282b | 4566 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4567 | if (laundry_wq == NULL) |
4568 | return -ENOMEM; | |
b5a1a81e BF |
4569 | ret = nfsd4_create_callback_queue(); |
4570 | if (ret) | |
4571 | goto out_free_laundry; | |
e46b498c | 4572 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4573 | set_max_delegations(); |
b5a1a81e BF |
4574 | return 0; |
4575 | out_free_laundry: | |
4576 | destroy_workqueue(laundry_wq); | |
4577 | return ret; | |
1da177e4 LT |
4578 | } |
4579 | ||
29ab23cc | 4580 | int |
76a3550e | 4581 | nfs4_state_start(void) |
1da177e4 | 4582 | { |
190e4fbf | 4583 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4584 | return __nfs4_state_start(); |
1da177e4 LT |
4585 | } |
4586 | ||
1da177e4 LT |
4587 | static void |
4588 | __nfs4_state_shutdown(void) | |
4589 | { | |
4590 | int i; | |
4591 | struct nfs4_client *clp = NULL; | |
4592 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4593 | struct list_head *pos, *next, reaplist; |
4594 | ||
1da177e4 LT |
4595 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4596 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4597 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4598 | expire_client(clp); | |
4599 | } | |
4600 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4601 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4602 | expire_client(clp); | |
4603 | } | |
4604 | } | |
4605 | INIT_LIST_HEAD(&reaplist); | |
4606 | spin_lock(&recall_lock); | |
4607 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4608 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4609 | list_move(&dp->dl_recall_lru, &reaplist); | |
4610 | } | |
4611 | spin_unlock(&recall_lock); | |
4612 | list_for_each_safe(pos, next, &reaplist) { | |
4613 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4614 | list_del_init(&dp->dl_recall_lru); | |
4615 | unhash_delegation(dp); | |
4616 | } | |
4617 | ||
190e4fbf | 4618 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4619 | } |
4620 | ||
4621 | void | |
4622 | nfs4_state_shutdown(void) | |
4623 | { | |
afe2c511 | 4624 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4625 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4626 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4627 | nfs4_lock_state(); |
4628 | nfs4_release_reclaim(); | |
4629 | __nfs4_state_shutdown(); | |
1da177e4 | 4630 | nfs4_unlock_state(); |
c3935e30 | 4631 | nfsd4_destroy_callback_queue(); |
1da177e4 LT |
4632 | } |
4633 | ||
3dd98a3b JL |
4634 | /* |
4635 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4636 | * accessed when nfsd is starting. | |
4637 | */ | |
0964a3d3 N |
4638 | static void |
4639 | nfs4_set_recdir(char *recdir) | |
4640 | { | |
0964a3d3 | 4641 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4642 | } |
4643 | ||
4644 | /* | |
4645 | * Change the NFSv4 recovery directory to recdir. | |
4646 | */ | |
4647 | int | |
4648 | nfs4_reset_recoverydir(char *recdir) | |
4649 | { | |
4650 | int status; | |
a63bb996 | 4651 | struct path path; |
0964a3d3 | 4652 | |
a63bb996 | 4653 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4654 | if (status) |
4655 | return status; | |
4656 | status = -ENOTDIR; | |
a63bb996 | 4657 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4658 | nfs4_set_recdir(recdir); |
4659 | status = 0; | |
4660 | } | |
a63bb996 | 4661 | path_put(&path); |
0964a3d3 N |
4662 | return status; |
4663 | } | |
4664 | ||
3dd98a3b JL |
4665 | char * |
4666 | nfs4_recoverydir(void) | |
4667 | { | |
4668 | return user_recovery_dirname; | |
4669 | } |