Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
68e76ad0 | 40 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 41 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 42 | #include "xdr4.h" |
0a3adade | 43 | #include "vfs.h" |
1da177e4 LT |
44 | |
45 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
46 | ||
47 | /* Globals */ | |
cf07d2ea | 48 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 49 | time_t nfsd4_grace = 90; |
fd39ca9a | 50 | static time_t boot_time; |
1da177e4 LT |
51 | static u32 current_ownerid = 1; |
52 | static u32 current_fileid = 1; | |
53 | static u32 current_delegid = 1; | |
fd39ca9a N |
54 | static stateid_t zerostateid; /* bits all 0 */ |
55 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 56 | static u64 current_sessionid = 1; |
fd39ca9a N |
57 | |
58 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
59 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 60 | |
1da177e4 | 61 | /* forward declarations */ |
fd39ca9a | 62 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 | 63 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
0964a3d3 N |
64 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
65 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 | 66 | |
8b671b80 BF |
67 | /* Locking: */ |
68 | ||
69 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 70 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 71 | |
8b671b80 BF |
72 | /* |
73 | * Currently used for the del_recall_lru and file hash table. In an | |
74 | * effort to decrease the scope of the client_mutex, this spinlock may | |
75 | * eventually cover more: | |
76 | */ | |
77 | static DEFINE_SPINLOCK(recall_lock); | |
78 | ||
e18b890b CL |
79 | static struct kmem_cache *stateowner_slab = NULL; |
80 | static struct kmem_cache *file_slab = NULL; | |
81 | static struct kmem_cache *stateid_slab = NULL; | |
82 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 83 | |
1da177e4 LT |
84 | void |
85 | nfs4_lock_state(void) | |
86 | { | |
353ab6e9 | 87 | mutex_lock(&client_mutex); |
1da177e4 LT |
88 | } |
89 | ||
90 | void | |
91 | nfs4_unlock_state(void) | |
92 | { | |
353ab6e9 | 93 | mutex_unlock(&client_mutex); |
1da177e4 LT |
94 | } |
95 | ||
96 | static inline u32 | |
97 | opaque_hashval(const void *ptr, int nbytes) | |
98 | { | |
99 | unsigned char *cptr = (unsigned char *) ptr; | |
100 | ||
101 | u32 x = 0; | |
102 | while (nbytes--) { | |
103 | x *= 37; | |
104 | x += *cptr++; | |
105 | } | |
106 | return x; | |
107 | } | |
108 | ||
1da177e4 LT |
109 | static struct list_head del_recall_lru; |
110 | ||
13cd2184 N |
111 | static inline void |
112 | put_nfs4_file(struct nfs4_file *fi) | |
113 | { | |
8b671b80 BF |
114 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
115 | list_del(&fi->fi_hash); | |
116 | spin_unlock(&recall_lock); | |
117 | iput(fi->fi_inode); | |
118 | kmem_cache_free(file_slab, fi); | |
119 | } | |
13cd2184 N |
120 | } |
121 | ||
122 | static inline void | |
123 | get_nfs4_file(struct nfs4_file *fi) | |
124 | { | |
8b671b80 | 125 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
126 | } |
127 | ||
ef0f3390 | 128 | static int num_delegations; |
c2f1a551 | 129 | unsigned int max_delegations; |
ef0f3390 N |
130 | |
131 | /* | |
132 | * Open owner state (share locks) | |
133 | */ | |
134 | ||
135 | /* hash tables for nfs4_stateowner */ | |
136 | #define OWNER_HASH_BITS 8 | |
137 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
138 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
139 | ||
140 | #define ownerid_hashval(id) \ | |
141 | ((id) & OWNER_HASH_MASK) | |
142 | #define ownerstr_hashval(clientid, ownername) \ | |
143 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
144 | ||
145 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
146 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
147 | ||
148 | /* hash table for nfs4_file */ | |
149 | #define FILE_HASH_BITS 8 | |
150 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 151 | |
ef0f3390 N |
152 | /* hash table for (open)nfs4_stateid */ |
153 | #define STATEID_HASH_BITS 10 | |
154 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
155 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
156 | ||
157 | #define file_hashval(x) \ | |
158 | hash_ptr(x, FILE_HASH_BITS) | |
159 | #define stateid_hashval(owner_id, file_id) \ | |
160 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
161 | ||
162 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
163 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
164 | ||
998db52c | 165 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
166 | { |
167 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
168 | atomic_inc(&fp->fi_access[oflag]); | |
169 | } | |
170 | ||
998db52c BF |
171 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
172 | { | |
173 | if (oflag == O_RDWR) { | |
174 | __nfs4_file_get_access(fp, O_RDONLY); | |
175 | __nfs4_file_get_access(fp, O_WRONLY); | |
176 | } else | |
177 | __nfs4_file_get_access(fp, oflag); | |
178 | } | |
179 | ||
180 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
181 | { |
182 | if (fp->fi_fds[oflag]) { | |
183 | fput(fp->fi_fds[oflag]); | |
184 | fp->fi_fds[oflag] = NULL; | |
185 | } | |
186 | } | |
187 | ||
998db52c | 188 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
189 | { |
190 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
191 | nfs4_file_put_fd(fp, O_RDWR); | |
192 | nfs4_file_put_fd(fp, oflag); | |
193 | } | |
194 | } | |
195 | ||
998db52c BF |
196 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
197 | { | |
198 | if (oflag == O_RDWR) { | |
199 | __nfs4_file_put_access(fp, O_RDONLY); | |
200 | __nfs4_file_put_access(fp, O_WRONLY); | |
201 | } else | |
202 | __nfs4_file_put_access(fp, oflag); | |
203 | } | |
204 | ||
1da177e4 LT |
205 | static struct nfs4_delegation * |
206 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
207 | { | |
208 | struct nfs4_delegation *dp; | |
209 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
210 | |
211 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
212 | /* |
213 | * Major work on the lease subsystem (for example, to support | |
214 | * calbacks on stat) will be required before we can support | |
215 | * write delegations properly. | |
216 | */ | |
217 | if (type != NFS4_OPEN_DELEGATE_READ) | |
218 | return NULL; | |
47f9940c MS |
219 | if (fp->fi_had_conflict) |
220 | return NULL; | |
c2f1a551 | 221 | if (num_delegations > max_delegations) |
ef0f3390 | 222 | return NULL; |
5b2d21c1 N |
223 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
224 | if (dp == NULL) | |
1da177e4 | 225 | return dp; |
ef0f3390 | 226 | num_delegations++; |
ea1da636 N |
227 | INIT_LIST_HEAD(&dp->dl_perfile); |
228 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
229 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
230 | dp->dl_client = clp; | |
13cd2184 | 231 | get_nfs4_file(fp); |
1da177e4 | 232 | dp->dl_file = fp; |
1da177e4 | 233 | dp->dl_type = type; |
e4e83ea4 | 234 | dp->dl_stateid.si_boot = boot_time; |
1da177e4 LT |
235 | dp->dl_stateid.si_stateownerid = current_delegid++; |
236 | dp->dl_stateid.si_fileid = 0; | |
237 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 238 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
239 | dp->dl_time = 0; |
240 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 241 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
242 | return dp; |
243 | } | |
244 | ||
245 | void | |
246 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
247 | { | |
248 | if (atomic_dec_and_test(&dp->dl_count)) { | |
249 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 250 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 251 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 252 | num_delegations--; |
1da177e4 LT |
253 | } |
254 | } | |
255 | ||
acfdf5c3 | 256 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 257 | { |
acfdf5c3 BF |
258 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
259 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
260 | fp->fi_lease = NULL; | |
4ee63624 | 261 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
262 | fp->fi_deleg_file = NULL; |
263 | } | |
1da177e4 LT |
264 | } |
265 | ||
266 | /* Called under the state lock. */ | |
267 | static void | |
268 | unhash_delegation(struct nfs4_delegation *dp) | |
269 | { | |
ea1da636 | 270 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 271 | spin_lock(&recall_lock); |
5d926e8c | 272 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
273 | list_del_init(&dp->dl_recall_lru); |
274 | spin_unlock(&recall_lock); | |
acfdf5c3 | 275 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
276 | nfs4_put_delegation(dp); |
277 | } | |
278 | ||
279 | /* | |
280 | * SETCLIENTID state | |
281 | */ | |
282 | ||
36acb66b | 283 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
284 | static DEFINE_SPINLOCK(client_lock); |
285 | ||
1da177e4 LT |
286 | /* Hash tables for nfs4_clientid state */ |
287 | #define CLIENT_HASH_BITS 4 | |
288 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
289 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
290 | ||
291 | #define clientid_hashval(id) \ | |
292 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
293 | #define clientstr_hashval(name) \ |
294 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
295 | /* |
296 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
297 | * used in reboot/reset lease grace period processing | |
298 | * | |
299 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
300 | * setclientid_confirmed info. | |
301 | * | |
302 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
303 | * setclientid info. | |
304 | * | |
305 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
306 | * for lease renewal. | |
307 | * | |
308 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
309 | * for last close replay. | |
310 | */ | |
311 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
312 | static int reclaim_str_hashtbl_size = 0; | |
313 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
314 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
315 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
316 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
317 | static struct list_head client_lru; | |
318 | static struct list_head close_lru; | |
319 | ||
f9d7562f BF |
320 | /* |
321 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
322 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
323 | * only what share bits are currently in force, but also what | |
324 | * combinations of share bits previous opens have used. This allows us | |
325 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
326 | * return an error if the client attempt to downgrade to a combination | |
327 | * of share bits not explicable by closing some of its previous opens. | |
328 | * | |
329 | * XXX: This enforcement is actually incomplete, since we don't keep | |
330 | * track of access/deny bit combinations; so, e.g., we allow: | |
331 | * | |
332 | * OPEN allow read, deny write | |
333 | * OPEN allow both, deny none | |
334 | * DOWNGRADE allow read, deny none | |
335 | * | |
336 | * which we should reject. | |
337 | */ | |
338 | static void | |
339 | set_access(unsigned int *access, unsigned long bmap) { | |
340 | int i; | |
341 | ||
342 | *access = 0; | |
343 | for (i = 1; i < 4; i++) { | |
344 | if (test_bit(i, &bmap)) | |
345 | *access |= i; | |
346 | } | |
347 | } | |
348 | ||
349 | static void | |
350 | set_deny(unsigned int *deny, unsigned long bmap) { | |
351 | int i; | |
352 | ||
353 | *deny = 0; | |
354 | for (i = 0; i < 4; i++) { | |
355 | if (test_bit(i, &bmap)) | |
356 | *deny |= i ; | |
357 | } | |
358 | } | |
359 | ||
360 | static int | |
361 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
362 | unsigned int access, deny; | |
363 | ||
364 | set_access(&access, stp->st_access_bmap); | |
365 | set_deny(&deny, stp->st_deny_bmap); | |
366 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
367 | return 0; | |
368 | return 1; | |
369 | } | |
370 | ||
371 | static int nfs4_access_to_omode(u32 access) | |
372 | { | |
8f34a430 | 373 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
374 | case NFS4_SHARE_ACCESS_READ: |
375 | return O_RDONLY; | |
376 | case NFS4_SHARE_ACCESS_WRITE: | |
377 | return O_WRONLY; | |
378 | case NFS4_SHARE_ACCESS_BOTH: | |
379 | return O_RDWR; | |
380 | } | |
381 | BUG(); | |
382 | } | |
383 | ||
384 | static int nfs4_access_bmap_to_omode(struct nfs4_stateid *stp) | |
385 | { | |
386 | unsigned int access; | |
387 | ||
388 | set_access(&access, stp->st_access_bmap); | |
389 | return nfs4_access_to_omode(access); | |
390 | } | |
391 | ||
529d7b2a BF |
392 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
393 | { | |
394 | list_del(&stp->st_hash); | |
395 | list_del(&stp->st_perfile); | |
396 | list_del(&stp->st_perstateowner); | |
397 | } | |
398 | ||
399 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
400 | { | |
23fcf2ec | 401 | int oflag; |
0997b173 | 402 | |
23fcf2ec BF |
403 | if (stp->st_access_bmap) { |
404 | oflag = nfs4_access_bmap_to_omode(stp); | |
405 | nfs4_file_put_access(stp->st_file, oflag); | |
23fcf2ec | 406 | } |
a96e5b90 | 407 | put_nfs4_file(stp->st_file); |
529d7b2a BF |
408 | kmem_cache_free(stateid_slab, stp); |
409 | } | |
410 | ||
411 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
412 | { | |
413 | struct file *file; | |
414 | ||
415 | unhash_generic_stateid(stp); | |
416 | file = find_any_file(stp->st_file); | |
417 | if (file) | |
418 | locks_remove_posix(file, (fl_owner_t)stp->st_stateowner); | |
419 | free_generic_stateid(stp); | |
420 | } | |
421 | ||
422 | static void unhash_lockowner(struct nfs4_stateowner *sop) | |
423 | { | |
424 | struct nfs4_stateid *stp; | |
425 | ||
426 | list_del(&sop->so_idhash); | |
427 | list_del(&sop->so_strhash); | |
428 | list_del(&sop->so_perstateid); | |
429 | while (!list_empty(&sop->so_stateids)) { | |
430 | stp = list_first_entry(&sop->so_stateids, | |
431 | struct nfs4_stateid, st_perstateowner); | |
432 | release_lock_stateid(stp); | |
433 | } | |
434 | } | |
435 | ||
436 | static void release_lockowner(struct nfs4_stateowner *sop) | |
437 | { | |
438 | unhash_lockowner(sop); | |
439 | nfs4_put_stateowner(sop); | |
440 | } | |
441 | ||
442 | static void | |
443 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
444 | { | |
445 | struct nfs4_stateowner *lock_sop; | |
446 | ||
447 | while (!list_empty(&open_stp->st_lockowners)) { | |
448 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
449 | struct nfs4_stateowner, so_perstateid); | |
450 | /* list_del(&open_stp->st_lockowners); */ | |
451 | BUG_ON(lock_sop->so_is_open_owner); | |
452 | release_lockowner(lock_sop); | |
453 | } | |
454 | } | |
455 | ||
2283963f BF |
456 | static void release_open_stateid(struct nfs4_stateid *stp) |
457 | { | |
458 | unhash_generic_stateid(stp); | |
459 | release_stateid_lockowners(stp); | |
2283963f BF |
460 | free_generic_stateid(stp); |
461 | } | |
462 | ||
f044ff83 | 463 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
464 | { |
465 | struct nfs4_stateid *stp; | |
466 | ||
467 | list_del(&sop->so_idhash); | |
468 | list_del(&sop->so_strhash); | |
f044ff83 BF |
469 | list_del(&sop->so_perclient); |
470 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 471 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
472 | stp = list_first_entry(&sop->so_stateids, |
473 | struct nfs4_stateid, st_perstateowner); | |
474 | release_open_stateid(stp); | |
f1d110ca BF |
475 | } |
476 | } | |
477 | ||
f044ff83 | 478 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 479 | { |
f044ff83 | 480 | unhash_openowner(sop); |
f1d110ca BF |
481 | list_del(&sop->so_close_lru); |
482 | nfs4_put_stateowner(sop); | |
483 | } | |
484 | ||
5282fd72 ME |
485 | #define SESSION_HASH_SIZE 512 |
486 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
487 | ||
488 | static inline int | |
489 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
490 | { | |
491 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
492 | ||
493 | return sid->sequence % SESSION_HASH_SIZE; | |
494 | } | |
495 | ||
496 | static inline void | |
497 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
498 | { | |
499 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
500 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
501 | } | |
502 | ||
ec6b5d7b AA |
503 | static void |
504 | gen_sessionid(struct nfsd4_session *ses) | |
505 | { | |
506 | struct nfs4_client *clp = ses->se_client; | |
507 | struct nfsd4_sessionid *sid; | |
508 | ||
509 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
510 | sid->clientid = clp->cl_clientid; | |
511 | sid->sequence = current_sessionid++; | |
512 | sid->reserved = 0; | |
513 | } | |
514 | ||
515 | /* | |
a649637c AA |
516 | * The protocol defines ca_maxresponssize_cached to include the size of |
517 | * the rpc header, but all we need to cache is the data starting after | |
518 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
519 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
520 | * value that is the number of bytes in our cache plus a few additional | |
521 | * bytes. In order to stay on the safe side, and not promise more than | |
522 | * we can cache, those additional bytes must be the minimum possible: 24 | |
523 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
524 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
525 | * for the SEQUENCE op response: | |
526 | */ | |
527 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
528 | ||
557ce264 AA |
529 | static void |
530 | free_session_slots(struct nfsd4_session *ses) | |
531 | { | |
532 | int i; | |
533 | ||
534 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
535 | kfree(ses->se_slots[i]); | |
536 | } | |
537 | ||
a649637c | 538 | /* |
efe0cb6d BF |
539 | * We don't actually need to cache the rpc and session headers, so we |
540 | * can allocate a little less for each slot: | |
541 | */ | |
542 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
543 | { | |
544 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
545 | } | |
546 | ||
5b6feee9 | 547 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 548 | { |
5b6feee9 BF |
549 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
550 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 551 | |
5b6feee9 BF |
552 | return size; |
553 | } | |
ec6b5d7b | 554 | |
5b6feee9 BF |
555 | /* |
556 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
557 | * re-negotiate active sessions and reduce their slot usage to make |
558 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 559 | */ |
5b6feee9 | 560 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 561 | { |
5b6feee9 | 562 | int avail; |
ec6b5d7b | 563 | |
5b6feee9 | 564 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 565 | |
5b6feee9 BF |
566 | spin_lock(&nfsd_drc_lock); |
567 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
568 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
569 | num = min_t(int, num, avail / slotsize); | |
570 | nfsd_drc_mem_used += num * slotsize; | |
571 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 572 | |
5b6feee9 BF |
573 | return num; |
574 | } | |
ec6b5d7b | 575 | |
5b6feee9 BF |
576 | static void nfsd4_put_drc_mem(int slotsize, int num) |
577 | { | |
4bd9b0f4 | 578 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 579 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 580 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 581 | } |
ec6b5d7b | 582 | |
5b6feee9 BF |
583 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
584 | { | |
585 | struct nfsd4_session *new; | |
586 | int mem, i; | |
a649637c | 587 | |
5b6feee9 BF |
588 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
589 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
590 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 591 | |
5b6feee9 BF |
592 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
593 | if (!new) | |
594 | return NULL; | |
557ce264 | 595 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
596 | for (i = 0; i < numslots; i++) { |
597 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
598 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
599 | if (!new->se_slots[i]) | |
557ce264 | 600 | goto out_free; |
557ce264 | 601 | } |
5b6feee9 BF |
602 | return new; |
603 | out_free: | |
604 | while (i--) | |
605 | kfree(new->se_slots[i]); | |
606 | kfree(new); | |
607 | return NULL; | |
ec6b5d7b AA |
608 | } |
609 | ||
5b6feee9 | 610 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 611 | { |
5b6feee9 | 612 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 613 | |
5b6feee9 | 614 | new->maxreqs = numslots; |
d2b21743 MJ |
615 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
616 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
617 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
618 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
619 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
620 | } | |
ec6b5d7b | 621 | |
19cf5c02 BF |
622 | static void free_conn(struct nfsd4_conn *c) |
623 | { | |
624 | svc_xprt_put(c->cn_xprt); | |
625 | kfree(c); | |
626 | } | |
ec6b5d7b | 627 | |
19cf5c02 BF |
628 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
629 | { | |
630 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
631 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 632 | |
19cf5c02 BF |
633 | spin_lock(&clp->cl_lock); |
634 | if (!list_empty(&c->cn_persession)) { | |
635 | list_del(&c->cn_persession); | |
636 | free_conn(c); | |
637 | } | |
638 | spin_unlock(&clp->cl_lock); | |
eea49806 | 639 | nfsd4_probe_callback(clp); |
19cf5c02 | 640 | } |
ec6b5d7b | 641 | |
d29c374c | 642 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 643 | { |
c7662518 | 644 | struct nfsd4_conn *conn; |
ec6b5d7b | 645 | |
c7662518 BF |
646 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
647 | if (!conn) | |
db90681d | 648 | return NULL; |
c7662518 BF |
649 | svc_xprt_get(rqstp->rq_xprt); |
650 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 651 | conn->cn_flags = flags; |
db90681d BF |
652 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
653 | return conn; | |
654 | } | |
a649637c | 655 | |
328ead28 BF |
656 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
657 | { | |
658 | conn->cn_session = ses; | |
659 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
660 | } |
661 | ||
db90681d | 662 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 663 | { |
db90681d | 664 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 665 | |
c7662518 | 666 | spin_lock(&clp->cl_lock); |
328ead28 | 667 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 668 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
669 | } |
670 | ||
21b75b01 | 671 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 672 | { |
19cf5c02 | 673 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 674 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
675 | } |
676 | ||
1d1bc8f2 | 677 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 678 | { |
db90681d | 679 | struct nfsd4_conn *conn; |
21b75b01 | 680 | int ret; |
ec6b5d7b | 681 | |
1d1bc8f2 | 682 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
683 | if (!conn) |
684 | return nfserr_jukebox; | |
685 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
686 | ret = nfsd4_register_conn(conn); |
687 | if (ret) | |
688 | /* oops; xprt is already down: */ | |
689 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
690 | return nfs_ok; |
691 | } | |
ec6b5d7b | 692 | |
1d1bc8f2 BF |
693 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
694 | { | |
695 | u32 dir = NFS4_CDFC4_FORE; | |
696 | ||
697 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
698 | dir |= NFS4_CDFC4_BACK; | |
699 | ||
700 | return nfsd4_new_conn(rqstp, ses, dir); | |
701 | } | |
702 | ||
703 | /* must be called under client_lock */ | |
19cf5c02 | 704 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 705 | { |
19cf5c02 BF |
706 | struct nfs4_client *clp = s->se_client; |
707 | struct nfsd4_conn *c; | |
ec6b5d7b | 708 | |
19cf5c02 BF |
709 | spin_lock(&clp->cl_lock); |
710 | while (!list_empty(&s->se_conns)) { | |
711 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
712 | list_del_init(&c->cn_persession); | |
713 | spin_unlock(&clp->cl_lock); | |
557ce264 | 714 | |
19cf5c02 BF |
715 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
716 | free_conn(c); | |
ec6b5d7b | 717 | |
19cf5c02 BF |
718 | spin_lock(&clp->cl_lock); |
719 | } | |
720 | spin_unlock(&clp->cl_lock); | |
c7662518 | 721 | } |
ec6b5d7b | 722 | |
c7662518 BF |
723 | void free_session(struct kref *kref) |
724 | { | |
725 | struct nfsd4_session *ses; | |
726 | int mem; | |
727 | ||
728 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 729 | nfsd4_del_conns(ses); |
c7662518 BF |
730 | spin_lock(&nfsd_drc_lock); |
731 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
732 | nfsd_drc_mem_used -= mem; | |
733 | spin_unlock(&nfsd_drc_lock); | |
734 | free_session_slots(ses); | |
735 | kfree(ses); | |
736 | } | |
737 | ||
ac7c46f2 | 738 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
739 | { |
740 | struct nfsd4_session *new; | |
741 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
742 | int numslots, slotsize; | |
c7662518 | 743 | int status; |
5b6feee9 BF |
744 | int idx; |
745 | ||
746 | /* | |
747 | * Note decreasing slot size below client's request may | |
748 | * make it difficult for client to function correctly, whereas | |
749 | * decreasing the number of slots will (just?) affect | |
750 | * performance. When short on memory we therefore prefer to | |
751 | * decrease number of slots instead of their size. | |
752 | */ | |
753 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
754 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
755 | if (numslots < 1) |
756 | return NULL; | |
5b6feee9 BF |
757 | |
758 | new = alloc_session(slotsize, numslots); | |
759 | if (!new) { | |
760 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 761 | return NULL; |
557ce264 | 762 | } |
5b6feee9 | 763 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 764 | |
ec6b5d7b AA |
765 | new->se_client = clp; |
766 | gen_sessionid(new); | |
ec6b5d7b | 767 | |
c7662518 BF |
768 | INIT_LIST_HEAD(&new->se_conns); |
769 | ||
ac7c46f2 | 770 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 771 | new->se_flags = cses->flags; |
8b5ce5cd | 772 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 773 | kref_init(&new->se_ref); |
5b6feee9 | 774 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 775 | spin_lock(&client_lock); |
ec6b5d7b | 776 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 777 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 778 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 779 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 780 | spin_unlock(&client_lock); |
ec6b5d7b | 781 | |
1d1bc8f2 | 782 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 783 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
784 | if (status) { |
785 | free_session(&new->se_ref); | |
ac7c46f2 | 786 | return NULL; |
c7662518 | 787 | } |
dcbeaa68 | 788 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 789 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
790 | /* |
791 | * This is a little silly; with sessions there's no real | |
792 | * use for the callback address. Use the peer address | |
793 | * as a reasonable default for now, but consider fixing | |
794 | * the rpc client not to require an address in the | |
795 | * future: | |
796 | */ | |
edd76786 BF |
797 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
798 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 799 | } |
dcbeaa68 | 800 | nfsd4_probe_callback(clp); |
ac7c46f2 | 801 | return new; |
ec6b5d7b AA |
802 | } |
803 | ||
9089f1b4 | 804 | /* caller must hold client_lock */ |
5282fd72 ME |
805 | static struct nfsd4_session * |
806 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
807 | { | |
808 | struct nfsd4_session *elem; | |
809 | int idx; | |
810 | ||
811 | dump_sessionid(__func__, sessionid); | |
812 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
813 | /* Search in the appropriate list */ |
814 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
815 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
816 | NFS4_MAX_SESSIONID_LEN)) { | |
817 | return elem; | |
818 | } | |
819 | } | |
820 | ||
821 | dprintk("%s: session not found\n", __func__); | |
822 | return NULL; | |
823 | } | |
824 | ||
9089f1b4 | 825 | /* caller must hold client_lock */ |
7116ed6b | 826 | static void |
5282fd72 | 827 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
828 | { |
829 | list_del(&ses->se_hash); | |
4c649378 | 830 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 831 | list_del(&ses->se_perclnt); |
4c649378 | 832 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
833 | } |
834 | ||
36acb66b | 835 | /* must be called under the client_lock */ |
1da177e4 | 836 | static inline void |
36acb66b | 837 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 838 | { |
07cd4909 BH |
839 | if (is_client_expired(clp)) { |
840 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
841 | __func__, | |
842 | clp->cl_clientid.cl_boot, | |
843 | clp->cl_clientid.cl_id); | |
844 | return; | |
845 | } | |
846 | ||
1da177e4 LT |
847 | /* |
848 | * Move client to the end to the LRU list. | |
849 | */ | |
850 | dprintk("renewing client (clientid %08x/%08x)\n", | |
851 | clp->cl_clientid.cl_boot, | |
852 | clp->cl_clientid.cl_id); | |
853 | list_move_tail(&clp->cl_lru, &client_lru); | |
854 | clp->cl_time = get_seconds(); | |
855 | } | |
856 | ||
36acb66b BH |
857 | static inline void |
858 | renew_client(struct nfs4_client *clp) | |
859 | { | |
860 | spin_lock(&client_lock); | |
861 | renew_client_locked(clp); | |
862 | spin_unlock(&client_lock); | |
863 | } | |
864 | ||
1da177e4 LT |
865 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
866 | static int | |
867 | STALE_CLIENTID(clientid_t *clid) | |
868 | { | |
869 | if (clid->cl_boot == boot_time) | |
870 | return 0; | |
60adfc50 AA |
871 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
872 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
873 | return 1; |
874 | } | |
875 | ||
876 | /* | |
877 | * XXX Should we use a slab cache ? | |
878 | * This type of memory management is somewhat inefficient, but we use it | |
879 | * anyway since SETCLIENTID is not a common operation. | |
880 | */ | |
35bba9a3 | 881 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
882 | { |
883 | struct nfs4_client *clp; | |
884 | ||
35bba9a3 BF |
885 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
886 | if (clp == NULL) | |
887 | return NULL; | |
888 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
889 | if (clp->cl_name.data == NULL) { | |
890 | kfree(clp); | |
891 | return NULL; | |
1da177e4 | 892 | } |
35bba9a3 BF |
893 | memcpy(clp->cl_name.data, name.data, name.len); |
894 | clp->cl_name.len = name.len; | |
1da177e4 LT |
895 | return clp; |
896 | } | |
897 | ||
898 | static inline void | |
899 | free_client(struct nfs4_client *clp) | |
900 | { | |
792c95dd BF |
901 | while (!list_empty(&clp->cl_sessions)) { |
902 | struct nfsd4_session *ses; | |
903 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
904 | se_perclnt); | |
905 | list_del(&ses->se_perclnt); | |
906 | nfsd4_put_session(ses); | |
907 | } | |
1da177e4 LT |
908 | if (clp->cl_cred.cr_group_info) |
909 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 910 | kfree(clp->cl_principal); |
1da177e4 LT |
911 | kfree(clp->cl_name.data); |
912 | kfree(clp); | |
913 | } | |
914 | ||
d7682988 BH |
915 | void |
916 | release_session_client(struct nfsd4_session *session) | |
917 | { | |
918 | struct nfs4_client *clp = session->se_client; | |
919 | ||
920 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
921 | return; | |
922 | if (is_client_expired(clp)) { | |
923 | free_client(clp); | |
924 | session->se_client = NULL; | |
925 | } else | |
926 | renew_client_locked(clp); | |
927 | spin_unlock(&client_lock); | |
d7682988 BH |
928 | } |
929 | ||
84d38ac9 BH |
930 | /* must be called under the client_lock */ |
931 | static inline void | |
932 | unhash_client_locked(struct nfs4_client *clp) | |
933 | { | |
792c95dd BF |
934 | struct nfsd4_session *ses; |
935 | ||
07cd4909 | 936 | mark_client_expired(clp); |
84d38ac9 | 937 | list_del(&clp->cl_lru); |
4c649378 | 938 | spin_lock(&clp->cl_lock); |
792c95dd BF |
939 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
940 | list_del_init(&ses->se_hash); | |
4c649378 | 941 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
942 | } |
943 | ||
1da177e4 LT |
944 | static void |
945 | expire_client(struct nfs4_client *clp) | |
946 | { | |
947 | struct nfs4_stateowner *sop; | |
948 | struct nfs4_delegation *dp; | |
1da177e4 LT |
949 | struct list_head reaplist; |
950 | ||
1da177e4 LT |
951 | INIT_LIST_HEAD(&reaplist); |
952 | spin_lock(&recall_lock); | |
ea1da636 N |
953 | while (!list_empty(&clp->cl_delegations)) { |
954 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 955 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
956 | list_move(&dp->dl_recall_lru, &reaplist); |
957 | } | |
958 | spin_unlock(&recall_lock); | |
959 | while (!list_empty(&reaplist)) { | |
960 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
961 | list_del_init(&dp->dl_recall_lru); | |
962 | unhash_delegation(dp); | |
963 | } | |
ea1da636 N |
964 | while (!list_empty(&clp->cl_openowners)) { |
965 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 966 | release_openowner(sop); |
1da177e4 | 967 | } |
6ff8da08 | 968 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
969 | if (clp->cl_cb_conn.cb_xprt) |
970 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
971 | list_del(&clp->cl_idhash); |
972 | list_del(&clp->cl_strhash); | |
be1fdf6c | 973 | spin_lock(&client_lock); |
84d38ac9 | 974 | unhash_client_locked(clp); |
46583e25 BH |
975 | if (atomic_read(&clp->cl_refcount) == 0) |
976 | free_client(clp); | |
be1fdf6c | 977 | spin_unlock(&client_lock); |
1da177e4 LT |
978 | } |
979 | ||
35bba9a3 BF |
980 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
981 | { | |
982 | memcpy(target->cl_verifier.data, source->data, | |
983 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
984 | } |
985 | ||
35bba9a3 BF |
986 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
987 | { | |
1da177e4 LT |
988 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
989 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
990 | } | |
991 | ||
35bba9a3 BF |
992 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
993 | { | |
1da177e4 LT |
994 | target->cr_uid = source->cr_uid; |
995 | target->cr_gid = source->cr_gid; | |
996 | target->cr_group_info = source->cr_group_info; | |
997 | get_group_info(target->cr_group_info); | |
998 | } | |
999 | ||
35bba9a3 | 1000 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 1001 | { |
a55370a3 | 1002 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1003 | } |
1004 | ||
1005 | static int | |
599e0a22 BF |
1006 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1007 | { | |
1008 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1009 | } |
1010 | ||
1011 | static int | |
599e0a22 BF |
1012 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1013 | { | |
1014 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1015 | } |
1016 | ||
1017 | /* XXX what about NGROUP */ | |
1018 | static int | |
599e0a22 BF |
1019 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1020 | { | |
1021 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1022 | } |
1023 | ||
5ec7b46c BF |
1024 | static void gen_clid(struct nfs4_client *clp) |
1025 | { | |
1026 | static u32 current_clientid = 1; | |
1027 | ||
1da177e4 LT |
1028 | clp->cl_clientid.cl_boot = boot_time; |
1029 | clp->cl_clientid.cl_id = current_clientid++; | |
1030 | } | |
1031 | ||
deda2faa BF |
1032 | static void gen_confirm(struct nfs4_client *clp) |
1033 | { | |
1034 | static u32 i; | |
1035 | u32 *p; | |
1da177e4 | 1036 | |
1da177e4 | 1037 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1038 | *p++ = get_seconds(); |
1039 | *p++ = i++; | |
1da177e4 LT |
1040 | } |
1041 | ||
b09333c4 RL |
1042 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1043 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1044 | { | |
1045 | struct nfs4_client *clp; | |
1046 | struct sockaddr *sa = svc_addr(rqstp); | |
1047 | char *princ; | |
1048 | ||
1049 | clp = alloc_client(name); | |
1050 | if (clp == NULL) | |
1051 | return NULL; | |
1052 | ||
792c95dd BF |
1053 | INIT_LIST_HEAD(&clp->cl_sessions); |
1054 | ||
b09333c4 RL |
1055 | princ = svc_gss_principal(rqstp); |
1056 | if (princ) { | |
1057 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1058 | if (clp->cl_principal == NULL) { | |
1059 | free_client(clp); | |
1060 | return NULL; | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 1065 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1066 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1067 | INIT_LIST_HEAD(&clp->cl_idhash); |
1068 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1069 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1070 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1071 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1072 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1073 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1074 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1075 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1076 | clear_bit(0, &clp->cl_cb_slot_busy); |
1077 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1078 | copy_verf(clp, verf); | |
1079 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1080 | clp->cl_flavor = rqstp->rq_flavor; | |
1081 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1082 | gen_confirm(clp); | |
edd76786 | 1083 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1084 | return clp; |
1085 | } | |
1086 | ||
35bba9a3 BF |
1087 | static int check_name(struct xdr_netobj name) |
1088 | { | |
1da177e4 LT |
1089 | if (name.len == 0) |
1090 | return 0; | |
1091 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 1092 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
1093 | return 0; |
1094 | } | |
1095 | return 1; | |
1096 | } | |
1097 | ||
fd39ca9a | 1098 | static void |
1da177e4 LT |
1099 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1100 | { | |
1101 | unsigned int idhashval; | |
1102 | ||
1103 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1104 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1105 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1106 | renew_client(clp); |
1da177e4 LT |
1107 | } |
1108 | ||
fd39ca9a | 1109 | static void |
1da177e4 LT |
1110 | move_to_confirmed(struct nfs4_client *clp) |
1111 | { | |
1112 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1113 | unsigned int strhashval; | |
1114 | ||
1115 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1116 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1117 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1118 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1119 | renew_client(clp); |
1120 | } | |
1121 | ||
1122 | static struct nfs4_client * | |
1123 | find_confirmed_client(clientid_t *clid) | |
1124 | { | |
1125 | struct nfs4_client *clp; | |
1126 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1127 | ||
1128 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1129 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1130 | return clp; |
1131 | } | |
1132 | return NULL; | |
1133 | } | |
1134 | ||
1135 | static struct nfs4_client * | |
1136 | find_unconfirmed_client(clientid_t *clid) | |
1137 | { | |
1138 | struct nfs4_client *clp; | |
1139 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1140 | ||
1141 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1142 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1143 | return clp; |
1144 | } | |
1145 | return NULL; | |
1146 | } | |
1147 | ||
6e5f15c9 | 1148 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1149 | { |
6e5f15c9 | 1150 | return clp->cl_exchange_flags != 0; |
e203d506 | 1151 | } |
a1bcecd2 | 1152 | |
28ce6054 | 1153 | static struct nfs4_client * |
e203d506 | 1154 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1155 | { |
1156 | struct nfs4_client *clp; | |
1157 | ||
1158 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1159 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1160 | return clp; |
1161 | } | |
1162 | return NULL; | |
1163 | } | |
1164 | ||
1165 | static struct nfs4_client * | |
e203d506 | 1166 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1167 | { |
1168 | struct nfs4_client *clp; | |
1169 | ||
1170 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1171 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1172 | return clp; |
1173 | } | |
1174 | return NULL; | |
1175 | } | |
1176 | ||
6f3d772f TU |
1177 | static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) |
1178 | { | |
1179 | switch (family) { | |
1180 | case AF_INET: | |
1181 | ((struct sockaddr_in *)sa)->sin_family = AF_INET; | |
1182 | ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; | |
1183 | return; | |
1184 | case AF_INET6: | |
1185 | ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; | |
1186 | ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; | |
1187 | return; | |
1188 | } | |
1189 | } | |
1190 | ||
fd39ca9a | 1191 | static void |
6f3d772f | 1192 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1193 | { |
07263f1e | 1194 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1195 | struct sockaddr *sa = svc_addr(rqstp); |
1196 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1197 | unsigned short expected_family; |
1198 | ||
1199 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1200 | if (se->se_callback_netid_len == 3 && | |
1201 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1202 | expected_family = AF_INET; | |
1203 | else if (se->se_callback_netid_len == 4 && | |
1204 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1205 | expected_family = AF_INET6; | |
1206 | else | |
1da177e4 LT |
1207 | goto out_err; |
1208 | ||
07263f1e | 1209 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1210 | se->se_callback_addr_len, |
07263f1e BF |
1211 | (struct sockaddr *)&conn->cb_addr, |
1212 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1213 | |
07263f1e | 1214 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1215 | goto out_err; |
aa9a4ec7 | 1216 | |
07263f1e BF |
1217 | if (conn->cb_addr.ss_family == AF_INET6) |
1218 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1219 | |
07263f1e BF |
1220 | conn->cb_prog = se->se_callback_prog; |
1221 | conn->cb_ident = se->se_callback_ident; | |
6f3d772f | 1222 | rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); |
1da177e4 LT |
1223 | return; |
1224 | out_err: | |
07263f1e BF |
1225 | conn->cb_addr.ss_family = AF_UNSPEC; |
1226 | conn->cb_addrlen = 0; | |
849823c5 | 1227 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1228 | "will not receive delegations\n", |
1229 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1230 | ||
1da177e4 LT |
1231 | return; |
1232 | } | |
1233 | ||
074fe897 | 1234 | /* |
557ce264 | 1235 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1236 | */ |
074fe897 AA |
1237 | void |
1238 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1239 | { |
557ce264 AA |
1240 | struct nfsd4_slot *slot = resp->cstate.slot; |
1241 | unsigned int base; | |
074fe897 | 1242 | |
557ce264 | 1243 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1244 | |
557ce264 AA |
1245 | slot->sl_opcnt = resp->opcnt; |
1246 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1247 | |
bf864a31 | 1248 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1249 | slot->sl_datalen = 0; |
bf864a31 | 1250 | return; |
074fe897 | 1251 | } |
557ce264 AA |
1252 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1253 | base = (char *)resp->cstate.datap - | |
1254 | (char *)resp->xbuf->head[0].iov_base; | |
1255 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1256 | slot->sl_datalen)) | |
1257 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1258 | return; | |
074fe897 AA |
1259 | } |
1260 | ||
1261 | /* | |
abfabf8c AA |
1262 | * Encode the replay sequence operation from the slot values. |
1263 | * If cachethis is FALSE encode the uncached rep error on the next | |
1264 | * operation which sets resp->p and increments resp->opcnt for | |
1265 | * nfs4svc_encode_compoundres. | |
074fe897 | 1266 | * |
074fe897 | 1267 | */ |
abfabf8c AA |
1268 | static __be32 |
1269 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1270 | struct nfsd4_compoundres *resp) | |
074fe897 | 1271 | { |
abfabf8c AA |
1272 | struct nfsd4_op *op; |
1273 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1274 | |
abfabf8c | 1275 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1276 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1277 | |
abfabf8c AA |
1278 | /* Encode the replayed sequence operation */ |
1279 | op = &args->ops[resp->opcnt - 1]; | |
1280 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1281 | |
abfabf8c | 1282 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1283 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1284 | op = &args->ops[resp->opcnt++]; |
1285 | op->status = nfserr_retry_uncached_rep; | |
1286 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1287 | } |
abfabf8c | 1288 | return op->status; |
074fe897 AA |
1289 | } |
1290 | ||
1291 | /* | |
557ce264 AA |
1292 | * The sequence operation is not cached because we can use the slot and |
1293 | * session values. | |
074fe897 AA |
1294 | */ |
1295 | __be32 | |
bf864a31 AA |
1296 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1297 | struct nfsd4_sequence *seq) | |
074fe897 | 1298 | { |
557ce264 | 1299 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1300 | __be32 status; |
1301 | ||
557ce264 | 1302 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1303 | |
abfabf8c AA |
1304 | /* Either returns 0 or nfserr_retry_uncached */ |
1305 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1306 | if (status == nfserr_retry_uncached_rep) | |
1307 | return status; | |
074fe897 | 1308 | |
557ce264 AA |
1309 | /* The sequence operation has been encoded, cstate->datap set. */ |
1310 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1311 | |
557ce264 AA |
1312 | resp->opcnt = slot->sl_opcnt; |
1313 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1314 | status = slot->sl_status; | |
074fe897 AA |
1315 | |
1316 | return status; | |
1317 | } | |
1318 | ||
0733d213 AA |
1319 | /* |
1320 | * Set the exchange_id flags returned by the server. | |
1321 | */ | |
1322 | static void | |
1323 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1324 | { | |
1325 | /* pNFS is not supported */ | |
1326 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1327 | ||
1328 | /* Referrals are supported, Migration is not. */ | |
1329 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1330 | ||
1331 | /* set the wire flags to return to client. */ | |
1332 | clid->flags = new->cl_exchange_flags; | |
1333 | } | |
1334 | ||
069b6ad4 AA |
1335 | __be32 |
1336 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1337 | struct nfsd4_compound_state *cstate, | |
1338 | struct nfsd4_exchange_id *exid) | |
1339 | { | |
0733d213 AA |
1340 | struct nfs4_client *unconf, *conf, *new; |
1341 | int status; | |
1342 | unsigned int strhashval; | |
1343 | char dname[HEXDIR_LEN]; | |
363168b4 | 1344 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1345 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1346 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1347 | |
363168b4 | 1348 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1349 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1350 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1351 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1352 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1353 | |
1354 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1355 | return nfserr_inval; | |
1356 | ||
1357 | /* Currently only support SP4_NONE */ | |
1358 | switch (exid->spa_how) { | |
1359 | case SP4_NONE: | |
1360 | break; | |
1361 | case SP4_SSV: | |
044bc1d4 | 1362 | return nfserr_serverfault; |
0733d213 AA |
1363 | default: |
1364 | BUG(); /* checked by xdr code */ | |
1365 | case SP4_MACH_CRED: | |
1366 | return nfserr_serverfault; /* no excuse :-/ */ | |
1367 | } | |
1368 | ||
1369 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1370 | ||
1371 | if (status) | |
1372 | goto error; | |
1373 | ||
1374 | strhashval = clientstr_hashval(dname); | |
1375 | ||
1376 | nfs4_lock_state(); | |
1377 | status = nfs_ok; | |
1378 | ||
e203d506 | 1379 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1380 | if (conf) { |
e203d506 BF |
1381 | if (!clp_used_exchangeid(conf)) { |
1382 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1383 | goto out; | |
1384 | } | |
0733d213 AA |
1385 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1386 | /* 18.35.4 case 8 */ | |
1387 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1388 | status = nfserr_not_same; | |
1389 | goto out; | |
1390 | } | |
1391 | /* Client reboot: destroy old state */ | |
1392 | expire_client(conf); | |
1393 | goto out_new; | |
1394 | } | |
1395 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1396 | /* 18.35.4 case 9 */ | |
1397 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1398 | status = nfserr_perm; | |
1399 | goto out; | |
1400 | } | |
1401 | expire_client(conf); | |
1402 | goto out_new; | |
1403 | } | |
0733d213 AA |
1404 | /* |
1405 | * Set bit when the owner id and verifier map to an already | |
1406 | * confirmed client id (18.35.3). | |
1407 | */ | |
1408 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1409 | ||
1410 | /* | |
1411 | * Falling into 18.35.4 case 2, possible router replay. | |
1412 | * Leave confirmed record intact and return same result. | |
1413 | */ | |
1414 | copy_verf(conf, &verf); | |
1415 | new = conf; | |
1416 | goto out_copy; | |
6ddbbbfe MS |
1417 | } |
1418 | ||
1419 | /* 18.35.4 case 7 */ | |
1420 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1421 | status = nfserr_noent; | |
1422 | goto out; | |
0733d213 AA |
1423 | } |
1424 | ||
e203d506 | 1425 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1426 | if (unconf) { |
1427 | /* | |
1428 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1429 | * a new unconfirmed record should be generated regardless | |
1430 | * of whether any properties have changed. | |
1431 | */ | |
1432 | expire_client(unconf); | |
1433 | } | |
1434 | ||
1435 | out_new: | |
1436 | /* Normal case */ | |
b09333c4 | 1437 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1438 | if (new == NULL) { |
4731030d | 1439 | status = nfserr_jukebox; |
0733d213 AA |
1440 | goto out; |
1441 | } | |
1442 | ||
0733d213 | 1443 | gen_clid(new); |
0733d213 AA |
1444 | add_to_unconfirmed(new, strhashval); |
1445 | out_copy: | |
1446 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1447 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1448 | ||
38eb76a5 | 1449 | exid->seqid = 1; |
0733d213 AA |
1450 | nfsd4_set_ex_flags(new, exid); |
1451 | ||
1452 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1453 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1454 | status = nfs_ok; |
1455 | ||
1456 | out: | |
1457 | nfs4_unlock_state(); | |
1458 | error: | |
1459 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1460 | return status; | |
069b6ad4 AA |
1461 | } |
1462 | ||
b85d4c01 | 1463 | static int |
88e588d5 | 1464 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1465 | { |
88e588d5 AA |
1466 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1467 | slot_seqid); | |
b85d4c01 BH |
1468 | |
1469 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1470 | if (slot_inuse) { |
1471 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1472 | return nfserr_jukebox; |
1473 | else | |
1474 | return nfserr_seq_misordered; | |
1475 | } | |
1476 | /* Normal */ | |
88e588d5 | 1477 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1478 | return nfs_ok; |
1479 | /* Replay */ | |
88e588d5 | 1480 | if (seqid == slot_seqid) |
b85d4c01 BH |
1481 | return nfserr_replay_cache; |
1482 | /* Wraparound */ | |
88e588d5 | 1483 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1484 | return nfs_ok; |
1485 | /* Misordered replay or misordered new request */ | |
1486 | return nfserr_seq_misordered; | |
1487 | } | |
1488 | ||
49557cc7 AA |
1489 | /* |
1490 | * Cache the create session result into the create session single DRC | |
1491 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1492 | * Do this for solo or embedded create session operations. | |
1493 | */ | |
1494 | static void | |
1495 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1496 | struct nfsd4_clid_slot *slot, int nfserr) | |
1497 | { | |
1498 | slot->sl_status = nfserr; | |
1499 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1500 | } | |
1501 | ||
1502 | static __be32 | |
1503 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1504 | struct nfsd4_clid_slot *slot) | |
1505 | { | |
1506 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1507 | return slot->sl_status; | |
1508 | } | |
1509 | ||
069b6ad4 AA |
1510 | __be32 |
1511 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1512 | struct nfsd4_compound_state *cstate, | |
1513 | struct nfsd4_create_session *cr_ses) | |
1514 | { | |
363168b4 | 1515 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1516 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1517 | struct nfsd4_session *new; |
49557cc7 | 1518 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1519 | bool confirm_me = false; |
ec6b5d7b AA |
1520 | int status = 0; |
1521 | ||
1522 | nfs4_lock_state(); | |
1523 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1524 | conf = find_confirmed_client(&cr_ses->clientid); | |
1525 | ||
1526 | if (conf) { | |
49557cc7 AA |
1527 | cs_slot = &conf->cl_cs_slot; |
1528 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1529 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1530 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1531 | cs_slot->sl_seqid); |
38eb76a5 | 1532 | /* Return the cached reply status */ |
49557cc7 | 1533 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1534 | goto out; |
49557cc7 | 1535 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1536 | status = nfserr_seq_misordered; |
1537 | dprintk("Sequence misordered!\n"); | |
1538 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1539 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1540 | goto out; |
1541 | } | |
ec6b5d7b AA |
1542 | } else if (unconf) { |
1543 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1544 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1545 | status = nfserr_clid_inuse; |
1546 | goto out; | |
1547 | } | |
1548 | ||
49557cc7 AA |
1549 | cs_slot = &unconf->cl_cs_slot; |
1550 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1551 | if (status) { |
1552 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1553 | status = nfserr_seq_misordered; |
cd5b8144 | 1554 | goto out; |
ec6b5d7b AA |
1555 | } |
1556 | ||
86c3e16c | 1557 | confirm_me = true; |
ec6b5d7b AA |
1558 | conf = unconf; |
1559 | } else { | |
1560 | status = nfserr_stale_clientid; | |
1561 | goto out; | |
1562 | } | |
1563 | ||
8323c3b2 BF |
1564 | /* |
1565 | * XXX: we should probably set this at creation time, and check | |
1566 | * for consistent minorversion use throughout: | |
1567 | */ | |
1568 | conf->cl_minorversion = 1; | |
408b79bc BF |
1569 | /* |
1570 | * We do not support RDMA or persistent sessions | |
1571 | */ | |
1572 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1573 | cr_ses->flags &= ~SESSION4_RDMA; | |
1574 | ||
ac7c46f2 BF |
1575 | status = nfserr_jukebox; |
1576 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1577 | if (!new) | |
ec6b5d7b | 1578 | goto out; |
ac7c46f2 BF |
1579 | status = nfs_ok; |
1580 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1581 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1582 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1583 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1584 | cs_slot->sl_seqid++; |
49557cc7 | 1585 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1586 | |
49557cc7 AA |
1587 | /* cache solo and embedded create sessions under the state lock */ |
1588 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1589 | if (confirm_me) |
1590 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1591 | out: |
1592 | nfs4_unlock_state(); | |
1593 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1594 | return status; | |
069b6ad4 AA |
1595 | } |
1596 | ||
57716355 BF |
1597 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1598 | { | |
1599 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1600 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1601 | ||
1602 | return argp->opcnt == resp->opcnt; | |
1603 | } | |
1604 | ||
1d1bc8f2 BF |
1605 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1606 | { | |
1607 | switch (*dir) { | |
1608 | case NFS4_CDFC4_FORE: | |
1609 | case NFS4_CDFC4_BACK: | |
1610 | return nfs_ok; | |
1611 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1612 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1613 | *dir = NFS4_CDFC4_BOTH; | |
1614 | return nfs_ok; | |
1615 | }; | |
1616 | return nfserr_inval; | |
1617 | } | |
1618 | ||
1619 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1620 | struct nfsd4_compound_state *cstate, | |
1621 | struct nfsd4_bind_conn_to_session *bcts) | |
1622 | { | |
1623 | __be32 status; | |
1624 | ||
1625 | if (!nfsd4_last_compound_op(rqstp)) | |
1626 | return nfserr_not_only_op; | |
1627 | spin_lock(&client_lock); | |
1628 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1629 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1630 | * client_lock iself: */ | |
1631 | if (cstate->session) { | |
1632 | nfsd4_get_session(cstate->session); | |
1633 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1634 | } | |
1635 | spin_unlock(&client_lock); | |
1636 | if (!cstate->session) | |
1637 | return nfserr_badsession; | |
1638 | ||
1639 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1640 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1641 | return nfs_ok; | |
1642 | } | |
1643 | ||
5d4cec2f BF |
1644 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1645 | { | |
1646 | if (!session) | |
1647 | return 0; | |
1648 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1649 | } | |
1650 | ||
069b6ad4 AA |
1651 | __be32 |
1652 | nfsd4_destroy_session(struct svc_rqst *r, | |
1653 | struct nfsd4_compound_state *cstate, | |
1654 | struct nfsd4_destroy_session *sessionid) | |
1655 | { | |
e10e0cfc BH |
1656 | struct nfsd4_session *ses; |
1657 | u32 status = nfserr_badsession; | |
1658 | ||
1659 | /* Notes: | |
1660 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1661 | * - Should we return nfserr_back_chan_busy if waiting for | |
1662 | * callbacks on to-be-destroyed session? | |
1663 | * - Do we need to clear any callback info from previous session? | |
1664 | */ | |
1665 | ||
5d4cec2f | 1666 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1667 | if (!nfsd4_last_compound_op(r)) |
1668 | return nfserr_not_only_op; | |
1669 | } | |
e10e0cfc | 1670 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1671 | spin_lock(&client_lock); |
e10e0cfc BH |
1672 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1673 | if (!ses) { | |
9089f1b4 | 1674 | spin_unlock(&client_lock); |
e10e0cfc BH |
1675 | goto out; |
1676 | } | |
1677 | ||
1678 | unhash_session(ses); | |
9089f1b4 | 1679 | spin_unlock(&client_lock); |
e10e0cfc | 1680 | |
ab707e15 | 1681 | nfs4_lock_state(); |
84f5f7cc | 1682 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1683 | nfs4_unlock_state(); |
19cf5c02 BF |
1684 | |
1685 | nfsd4_del_conns(ses); | |
1686 | ||
e10e0cfc BH |
1687 | nfsd4_put_session(ses); |
1688 | status = nfs_ok; | |
1689 | out: | |
1690 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1691 | return status; | |
069b6ad4 AA |
1692 | } |
1693 | ||
a663bdd8 | 1694 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1695 | { |
1696 | struct nfsd4_conn *c; | |
1697 | ||
1698 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1699 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1700 | return c; |
1701 | } | |
1702 | } | |
1703 | return NULL; | |
1704 | } | |
1705 | ||
a663bdd8 | 1706 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1707 | { |
1708 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1709 | struct nfsd4_conn *c; |
21b75b01 | 1710 | int ret; |
328ead28 BF |
1711 | |
1712 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1713 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1714 | if (c) { |
1715 | spin_unlock(&clp->cl_lock); | |
1716 | free_conn(new); | |
1717 | return; | |
1718 | } | |
1719 | __nfsd4_hash_conn(new, ses); | |
1720 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1721 | ret = nfsd4_register_conn(new); |
1722 | if (ret) | |
1723 | /* oops; xprt is already down: */ | |
1724 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1725 | return; |
1726 | } | |
1727 | ||
069b6ad4 | 1728 | __be32 |
b85d4c01 | 1729 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1730 | struct nfsd4_compound_state *cstate, |
1731 | struct nfsd4_sequence *seq) | |
1732 | { | |
f9bb94c4 | 1733 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1734 | struct nfsd4_session *session; |
1735 | struct nfsd4_slot *slot; | |
a663bdd8 | 1736 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1737 | int status; |
1738 | ||
f9bb94c4 AA |
1739 | if (resp->opcnt != 1) |
1740 | return nfserr_sequence_pos; | |
1741 | ||
a663bdd8 BF |
1742 | /* |
1743 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1744 | * below. | |
1745 | */ | |
1746 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1747 | if (!conn) | |
1748 | return nfserr_jukebox; | |
1749 | ||
9089f1b4 | 1750 | spin_lock(&client_lock); |
b85d4c01 BH |
1751 | status = nfserr_badsession; |
1752 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1753 | if (!session) | |
1754 | goto out; | |
1755 | ||
1756 | status = nfserr_badslot; | |
6c18ba9f | 1757 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1758 | goto out; |
1759 | ||
557ce264 | 1760 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1761 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1762 | ||
a8dfdaeb AA |
1763 | /* We do not negotiate the number of slots yet, so set the |
1764 | * maxslots to the session maxreqs which is used to encode | |
1765 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1766 | seq->maxslots = session->se_fchannel.maxreqs; | |
1767 | ||
88e588d5 | 1768 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1769 | if (status == nfserr_replay_cache) { |
1770 | cstate->slot = slot; | |
1771 | cstate->session = session; | |
da3846a2 | 1772 | /* Return the cached reply status and set cstate->status |
557ce264 | 1773 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1774 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1775 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1776 | goto out; |
b85d4c01 BH |
1777 | } |
1778 | if (status) | |
1779 | goto out; | |
1780 | ||
a663bdd8 BF |
1781 | nfsd4_sequence_check_conn(conn, session); |
1782 | conn = NULL; | |
328ead28 | 1783 | |
b85d4c01 BH |
1784 | /* Success! bump slot seqid */ |
1785 | slot->sl_inuse = true; | |
1786 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1787 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1788 | |
1789 | cstate->slot = slot; | |
1790 | cstate->session = session; | |
1791 | ||
b85d4c01 | 1792 | out: |
26c0c75e | 1793 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1794 | if (cstate->session) { |
0d7bb719 BF |
1795 | struct nfs4_client *clp = session->se_client; |
1796 | ||
36acb66b | 1797 | nfsd4_get_session(cstate->session); |
0d7bb719 BF |
1798 | atomic_inc(&clp->cl_refcount); |
1799 | if (clp->cl_cb_state == NFSD4_CB_DOWN) | |
1800 | seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; | |
aaf84eb9 | 1801 | } |
a663bdd8 | 1802 | kfree(conn); |
36acb66b | 1803 | spin_unlock(&client_lock); |
b85d4c01 BH |
1804 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1805 | return status; | |
069b6ad4 AA |
1806 | } |
1807 | ||
4dc6ec00 BF |
1808 | __be32 |
1809 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1810 | { | |
1811 | if (rc->rca_one_fs) { | |
1812 | if (!cstate->current_fh.fh_dentry) | |
1813 | return nfserr_nofilehandle; | |
1814 | /* | |
1815 | * We don't take advantage of the rca_one_fs case. | |
1816 | * That's OK, it's optional, we can safely ignore it. | |
1817 | */ | |
1818 | return nfs_ok; | |
1819 | } | |
1820 | nfs4_lock_state(); | |
1821 | if (is_client_expired(cstate->session->se_client)) { | |
1822 | nfs4_unlock_state(); | |
1823 | /* | |
1824 | * The following error isn't really legal. | |
1825 | * But we only get here if the client just explicitly | |
1826 | * destroyed the client. Surely it no longer cares what | |
1827 | * error it gets back on an operation for the dead | |
1828 | * client. | |
1829 | */ | |
1830 | return nfserr_stale_clientid; | |
1831 | } | |
1832 | nfsd4_create_clid_dir(cstate->session->se_client); | |
1833 | nfs4_unlock_state(); | |
1834 | return nfs_ok; | |
1835 | } | |
1836 | ||
b37ad28b | 1837 | __be32 |
b591480b BF |
1838 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1839 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1840 | { |
1da177e4 LT |
1841 | struct xdr_netobj clname = { |
1842 | .len = setclid->se_namelen, | |
1843 | .data = setclid->se_name, | |
1844 | }; | |
1845 | nfs4_verifier clverifier = setclid->se_verf; | |
1846 | unsigned int strhashval; | |
28ce6054 | 1847 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1848 | __be32 status; |
a55370a3 | 1849 | char dname[HEXDIR_LEN]; |
1da177e4 | 1850 | |
1da177e4 | 1851 | if (!check_name(clname)) |
73aea4ec | 1852 | return nfserr_inval; |
1da177e4 | 1853 | |
a55370a3 N |
1854 | status = nfs4_make_rec_clidname(dname, &clname); |
1855 | if (status) | |
73aea4ec | 1856 | return status; |
a55370a3 | 1857 | |
1da177e4 LT |
1858 | /* |
1859 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1860 | * We get here on a DRC miss. | |
1861 | */ | |
1862 | ||
a55370a3 | 1863 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1864 | |
1da177e4 | 1865 | nfs4_lock_state(); |
e203d506 | 1866 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 1867 | if (conf) { |
a186e767 | 1868 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1869 | status = nfserr_clid_inuse; |
e203d506 BF |
1870 | if (clp_used_exchangeid(conf)) |
1871 | goto out; | |
026722c2 | 1872 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1873 | char addr_str[INET6_ADDRSTRLEN]; |
1874 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1875 | sizeof(addr_str)); | |
1876 | dprintk("NFSD: setclientid: string in use by client " | |
1877 | "at %s\n", addr_str); | |
1da177e4 LT |
1878 | goto out; |
1879 | } | |
1da177e4 | 1880 | } |
a186e767 BF |
1881 | /* |
1882 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1883 | * has a description of SETCLIENTID request processing consisting | |
1884 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1885 | */ | |
e203d506 | 1886 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
1da177e4 LT |
1887 | status = nfserr_resource; |
1888 | if (!conf) { | |
a186e767 BF |
1889 | /* |
1890 | * RFC 3530 14.2.33 CASE 4: | |
1891 | * placed first, because it is the normal case | |
1da177e4 LT |
1892 | */ |
1893 | if (unconf) | |
1894 | expire_client(unconf); | |
b09333c4 | 1895 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1896 | if (new == NULL) |
1da177e4 | 1897 | goto out; |
1da177e4 | 1898 | gen_clid(new); |
599e0a22 | 1899 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1900 | /* |
a186e767 BF |
1901 | * RFC 3530 14.2.33 CASE 1: |
1902 | * probable callback update | |
1da177e4 | 1903 | */ |
31f4a6c1 N |
1904 | if (unconf) { |
1905 | /* Note this is removing unconfirmed {*x***}, | |
1906 | * which is stronger than RFC recommended {vxc**}. | |
1907 | * This has the advantage that there is at most | |
1908 | * one {*x***} in either list at any time. | |
1909 | */ | |
1910 | expire_client(unconf); | |
1da177e4 | 1911 | } |
b09333c4 | 1912 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1913 | if (new == NULL) |
1da177e4 | 1914 | goto out; |
1da177e4 | 1915 | copy_clid(new, conf); |
1da177e4 LT |
1916 | } else if (!unconf) { |
1917 | /* | |
a186e767 BF |
1918 | * RFC 3530 14.2.33 CASE 2: |
1919 | * probable client reboot; state will be removed if | |
1920 | * confirmed. | |
1da177e4 | 1921 | */ |
b09333c4 | 1922 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1923 | if (new == NULL) |
1da177e4 | 1924 | goto out; |
1da177e4 | 1925 | gen_clid(new); |
49ba8781 | 1926 | } else { |
a186e767 BF |
1927 | /* |
1928 | * RFC 3530 14.2.33 CASE 3: | |
1929 | * probable client reboot; state will be removed if | |
1930 | * confirmed. | |
1da177e4 LT |
1931 | */ |
1932 | expire_client(unconf); | |
b09333c4 | 1933 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1934 | if (new == NULL) |
1da177e4 | 1935 | goto out; |
1da177e4 | 1936 | gen_clid(new); |
1da177e4 | 1937 | } |
8323c3b2 BF |
1938 | /* |
1939 | * XXX: we should probably set this at creation time, and check | |
1940 | * for consistent minorversion use throughout: | |
1941 | */ | |
1942 | new->cl_minorversion = 0; | |
6f3d772f | 1943 | gen_callback(new, setclid, rqstp); |
c175b83c | 1944 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
1945 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
1946 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
1947 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
1948 | status = nfs_ok; | |
1949 | out: | |
1950 | nfs4_unlock_state(); | |
1951 | return status; | |
1952 | } | |
1953 | ||
1954 | ||
1955 | /* | |
a186e767 BF |
1956 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
1957 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
1958 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 1959 | */ |
b37ad28b | 1960 | __be32 |
b591480b BF |
1961 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
1962 | struct nfsd4_compound_state *cstate, | |
1963 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 1964 | { |
363168b4 | 1965 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 1966 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
1967 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
1968 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 1969 | __be32 status; |
1da177e4 LT |
1970 | |
1971 | if (STALE_CLIENTID(clid)) | |
1972 | return nfserr_stale_clientid; | |
1973 | /* | |
1974 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1975 | * We get here on a DRC miss. | |
1976 | */ | |
1977 | ||
1978 | nfs4_lock_state(); | |
21ab45a4 N |
1979 | |
1980 | conf = find_confirmed_client(clid); | |
1981 | unconf = find_unconfirmed_client(clid); | |
1982 | ||
1983 | status = nfserr_clid_inuse; | |
363168b4 | 1984 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 1985 | goto out; |
363168b4 | 1986 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
1987 | goto out; |
1988 | ||
a186e767 BF |
1989 | /* |
1990 | * section 14.2.34 of RFC 3530 has a description of | |
1991 | * SETCLIENTID_CONFIRM request processing consisting | |
1992 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
1993 | */ | |
366e0c1d | 1994 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
1995 | /* |
1996 | * RFC 3530 14.2.34 CASE 1: | |
1997 | * callback update | |
1998 | */ | |
599e0a22 | 1999 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2000 | status = nfserr_clid_inuse; |
2001 | else { | |
5a3c9d71 BF |
2002 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2003 | nfsd4_probe_callback(conf); | |
1a69c179 | 2004 | expire_client(unconf); |
1da177e4 | 2005 | status = nfs_ok; |
1a69c179 | 2006 | |
1da177e4 | 2007 | } |
f3aba4e5 | 2008 | } else if (conf && !unconf) { |
a186e767 BF |
2009 | /* |
2010 | * RFC 3530 14.2.34 CASE 2: | |
2011 | * probable retransmitted request; play it safe and | |
2012 | * do nothing. | |
7c79f737 | 2013 | */ |
599e0a22 | 2014 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2015 | status = nfserr_clid_inuse; |
21ab45a4 | 2016 | else |
1da177e4 | 2017 | status = nfs_ok; |
7c79f737 | 2018 | } else if (!conf && unconf |
599e0a22 | 2019 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2020 | /* |
2021 | * RFC 3530 14.2.34 CASE 3: | |
2022 | * Normal case; new or rebooted client: | |
7c79f737 | 2023 | */ |
599e0a22 | 2024 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2025 | status = nfserr_clid_inuse; |
2026 | } else { | |
1a69c179 N |
2027 | unsigned int hash = |
2028 | clientstr_hashval(unconf->cl_recdir); | |
2029 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2030 | hash); |
1a69c179 | 2031 | if (conf) { |
c7b9a459 | 2032 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2033 | expire_client(conf); |
2034 | } | |
1da177e4 | 2035 | move_to_confirmed(unconf); |
21ab45a4 | 2036 | conf = unconf; |
5a3c9d71 | 2037 | nfsd4_probe_callback(conf); |
1a69c179 | 2038 | status = nfs_ok; |
1da177e4 | 2039 | } |
599e0a22 BF |
2040 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2041 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2042 | &confirm)))) { |
a186e767 BF |
2043 | /* |
2044 | * RFC 3530 14.2.34 CASE 4: | |
2045 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2046 | */ |
1da177e4 | 2047 | status = nfserr_stale_clientid; |
7c79f737 | 2048 | } else { |
08e8987c N |
2049 | /* check that we have hit one of the cases...*/ |
2050 | status = nfserr_clid_inuse; | |
2051 | } | |
1da177e4 | 2052 | out: |
1da177e4 LT |
2053 | nfs4_unlock_state(); |
2054 | return status; | |
2055 | } | |
2056 | ||
1da177e4 LT |
2057 | /* OPEN Share state helper functions */ |
2058 | static inline struct nfs4_file * | |
2059 | alloc_init_file(struct inode *ino) | |
2060 | { | |
2061 | struct nfs4_file *fp; | |
2062 | unsigned int hashval = file_hashval(ino); | |
2063 | ||
e60d4398 N |
2064 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
2065 | if (fp) { | |
8b671b80 | 2066 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 2067 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
2068 | INIT_LIST_HEAD(&fp->fi_stateids); |
2069 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
2070 | fp->fi_inode = igrab(ino); |
2071 | fp->fi_id = current_fileid++; | |
47f9940c | 2072 | fp->fi_had_conflict = false; |
acfdf5c3 | 2073 | fp->fi_lease = NULL; |
f9d7562f BF |
2074 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2075 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
2076 | spin_lock(&recall_lock); |
2077 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2078 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2079 | return fp; |
2080 | } | |
2081 | return NULL; | |
2082 | } | |
2083 | ||
e60d4398 | 2084 | static void |
e18b890b | 2085 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2086 | { |
e60d4398 N |
2087 | if (*slab == NULL) |
2088 | return; | |
1a1d92c1 | 2089 | kmem_cache_destroy(*slab); |
e60d4398 | 2090 | *slab = NULL; |
1da177e4 LT |
2091 | } |
2092 | ||
e8ff2a84 | 2093 | void |
1da177e4 LT |
2094 | nfsd4_free_slabs(void) |
2095 | { | |
e60d4398 N |
2096 | nfsd4_free_slab(&stateowner_slab); |
2097 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 2098 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2099 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2100 | } |
1da177e4 | 2101 | |
e60d4398 N |
2102 | static int |
2103 | nfsd4_init_slabs(void) | |
2104 | { | |
2105 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 2106 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
2107 | if (stateowner_slab == NULL) |
2108 | goto out_nomem; | |
2109 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2110 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2111 | if (file_slab == NULL) |
2112 | goto out_nomem; | |
5ac049ac | 2113 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 2114 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
2115 | if (stateid_slab == NULL) |
2116 | goto out_nomem; | |
5b2d21c1 | 2117 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2118 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2119 | if (deleg_slab == NULL) |
2120 | goto out_nomem; | |
e60d4398 N |
2121 | return 0; |
2122 | out_nomem: | |
2123 | nfsd4_free_slabs(); | |
2124 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2125 | return -ENOMEM; | |
1da177e4 LT |
2126 | } |
2127 | ||
2128 | void | |
2129 | nfs4_free_stateowner(struct kref *kref) | |
2130 | { | |
2131 | struct nfs4_stateowner *sop = | |
2132 | container_of(kref, struct nfs4_stateowner, so_ref); | |
2133 | kfree(sop->so_owner.data); | |
2134 | kmem_cache_free(stateowner_slab, sop); | |
2135 | } | |
2136 | ||
2137 | static inline struct nfs4_stateowner * | |
2138 | alloc_stateowner(struct xdr_netobj *owner) | |
2139 | { | |
2140 | struct nfs4_stateowner *sop; | |
2141 | ||
2142 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
2143 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
2144 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
2145 | sop->so_owner.len = owner->len; | |
2146 | kref_init(&sop->so_ref); | |
2147 | return sop; | |
2148 | } | |
2149 | kmem_cache_free(stateowner_slab, sop); | |
2150 | } | |
2151 | return NULL; | |
2152 | } | |
2153 | ||
2154 | static struct nfs4_stateowner * | |
2155 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
2156 | struct nfs4_stateowner *sop; | |
2157 | struct nfs4_replay *rp; | |
2158 | unsigned int idhashval; | |
2159 | ||
2160 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
2161 | return NULL; | |
2162 | idhashval = ownerid_hashval(current_ownerid); | |
2163 | INIT_LIST_HEAD(&sop->so_idhash); | |
2164 | INIT_LIST_HEAD(&sop->so_strhash); | |
2165 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2166 | INIT_LIST_HEAD(&sop->so_stateids); |
2167 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
2168 | INIT_LIST_HEAD(&sop->so_close_lru); |
2169 | sop->so_time = 0; | |
2170 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
2171 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2172 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
2173 | sop->so_is_open_owner = 1; |
2174 | sop->so_id = current_ownerid++; | |
2175 | sop->so_client = clp; | |
2176 | sop->so_seqid = open->op_seqid; | |
2177 | sop->so_confirmed = 0; | |
2178 | rp = &sop->so_replay; | |
de1ae286 | 2179 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2180 | rp->rp_buflen = 0; |
2181 | rp->rp_buf = rp->rp_ibuf; | |
2182 | return sop; | |
2183 | } | |
2184 | ||
1da177e4 LT |
2185 | static inline void |
2186 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
2187 | struct nfs4_stateowner *sop = open->op_stateowner; | |
2188 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2189 | ||
2190 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
2191 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2192 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
2193 | INIT_LIST_HEAD(&stp->st_perfile); |
2194 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 2195 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 2196 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 2197 | stp->st_stateowner = sop; |
13cd2184 | 2198 | get_nfs4_file(fp); |
1da177e4 | 2199 | stp->st_file = fp; |
e4e83ea4 | 2200 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
2201 | stp->st_stateid.si_stateownerid = sop->so_id; |
2202 | stp->st_stateid.si_fileid = fp->fi_id; | |
2203 | stp->st_stateid.si_generation = 0; | |
2204 | stp->st_access_bmap = 0; | |
2205 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2206 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2207 | &stp->st_access_bmap); | |
1da177e4 | 2208 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2209 | stp->st_openstp = NULL; |
1da177e4 LT |
2210 | } |
2211 | ||
fd39ca9a | 2212 | static void |
1da177e4 LT |
2213 | move_to_close_lru(struct nfs4_stateowner *sop) |
2214 | { | |
2215 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
2216 | ||
358dd55a | 2217 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
2218 | sop->so_time = get_seconds(); |
2219 | } | |
2220 | ||
1da177e4 | 2221 | static int |
599e0a22 BF |
2222 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2223 | clientid_t *clid) | |
2224 | { | |
2225 | return (sop->so_owner.len == owner->len) && | |
2226 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2227 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2228 | } |
2229 | ||
2230 | static struct nfs4_stateowner * | |
2231 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
2232 | { | |
2233 | struct nfs4_stateowner *so = NULL; | |
2234 | ||
2235 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 2236 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
2237 | return so; |
2238 | } | |
2239 | return NULL; | |
2240 | } | |
2241 | ||
2242 | /* search file_hashtbl[] for file */ | |
2243 | static struct nfs4_file * | |
2244 | find_file(struct inode *ino) | |
2245 | { | |
2246 | unsigned int hashval = file_hashval(ino); | |
2247 | struct nfs4_file *fp; | |
2248 | ||
8b671b80 | 2249 | spin_lock(&recall_lock); |
1da177e4 | 2250 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2251 | if (fp->fi_inode == ino) { |
2252 | get_nfs4_file(fp); | |
8b671b80 | 2253 | spin_unlock(&recall_lock); |
1da177e4 | 2254 | return fp; |
13cd2184 | 2255 | } |
1da177e4 | 2256 | } |
8b671b80 | 2257 | spin_unlock(&recall_lock); |
1da177e4 LT |
2258 | return NULL; |
2259 | } | |
2260 | ||
d87a8ade | 2261 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2262 | { |
d87a8ade | 2263 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2264 | return 0; |
d87a8ade AA |
2265 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2266 | return 0; | |
2267 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2268 | if (minorversion && x) { | |
2269 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2270 | return 0; | |
2271 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2272 | return 0; | |
2273 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2274 | } | |
2275 | if (x) | |
8838dc43 BF |
2276 | return 0; |
2277 | return 1; | |
ba5a6a19 BF |
2278 | } |
2279 | ||
8838dc43 | 2280 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2281 | { |
8838dc43 BF |
2282 | /* Note: unlike access bits, deny bits may be zero. */ |
2283 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2284 | } |
1da177e4 | 2285 | |
1da177e4 LT |
2286 | /* |
2287 | * Called to check deny when READ with all zero stateid or | |
2288 | * WRITE with all zero or all one stateid | |
2289 | */ | |
b37ad28b | 2290 | static __be32 |
1da177e4 LT |
2291 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2292 | { | |
2293 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2294 | struct nfs4_file *fp; | |
2295 | struct nfs4_stateid *stp; | |
b37ad28b | 2296 | __be32 ret; |
1da177e4 LT |
2297 | |
2298 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2299 | ||
2300 | fp = find_file(ino); | |
13cd2184 N |
2301 | if (!fp) |
2302 | return nfs_ok; | |
b700949b | 2303 | ret = nfserr_locked; |
1da177e4 | 2304 | /* Search for conflicting share reservations */ |
13cd2184 N |
2305 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2306 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2307 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2308 | goto out; | |
1da177e4 | 2309 | } |
13cd2184 N |
2310 | ret = nfs_ok; |
2311 | out: | |
2312 | put_nfs4_file(fp); | |
2313 | return ret; | |
1da177e4 LT |
2314 | } |
2315 | ||
2316 | static inline void | |
f9d7562f | 2317 | nfs4_file_downgrade(struct nfs4_file *fp, unsigned int share_access) |
1da177e4 | 2318 | { |
f9d7562f BF |
2319 | if (share_access & NFS4_SHARE_ACCESS_WRITE) |
2320 | nfs4_file_put_access(fp, O_WRONLY); | |
2321 | if (share_access & NFS4_SHARE_ACCESS_READ) | |
2322 | nfs4_file_put_access(fp, O_RDONLY); | |
1da177e4 LT |
2323 | } |
2324 | ||
6b57d9c8 | 2325 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2326 | { |
1da177e4 LT |
2327 | /* We're assuming the state code never drops its reference |
2328 | * without first removing the lease. Since we're in this lease | |
2329 | * callback (and since the lease code is serialized by the kernel | |
2330 | * lock) we know the server hasn't removed the lease yet, we know | |
2331 | * it's safe to take a reference: */ | |
2332 | atomic_inc(&dp->dl_count); | |
2333 | ||
1da177e4 | 2334 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2335 | |
460781b5 | 2336 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2337 | dp->dl_time = get_seconds(); |
2338 | ||
6b57d9c8 BF |
2339 | nfsd4_cb_recall(dp); |
2340 | } | |
2341 | ||
acfdf5c3 | 2342 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2343 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2344 | { | |
acfdf5c3 BF |
2345 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2346 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2347 | |
acfdf5c3 BF |
2348 | BUG_ON(!fp); |
2349 | /* We assume break_lease is only called once per lease: */ | |
2350 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2351 | /* |
2352 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2353 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2354 | * in time: |
0272e1fd BF |
2355 | */ |
2356 | fl->fl_break_time = 0; | |
1da177e4 | 2357 | |
5d926e8c | 2358 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2359 | fp->fi_had_conflict = true; |
2360 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2361 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2362 | spin_unlock(&recall_lock); |
1da177e4 LT |
2363 | } |
2364 | ||
1da177e4 LT |
2365 | static |
2366 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2367 | { | |
2368 | if (arg & F_UNLCK) | |
2369 | return lease_modify(onlist, arg); | |
2370 | else | |
2371 | return -EAGAIN; | |
2372 | } | |
2373 | ||
7b021967 | 2374 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 | 2375 | .fl_break = nfsd_break_deleg_cb, |
1da177e4 LT |
2376 | .fl_change = nfsd_change_deleg_cb, |
2377 | }; | |
2378 | ||
2379 | ||
b37ad28b | 2380 | __be32 |
6668958f AA |
2381 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2382 | struct nfsd4_open *open) | |
1da177e4 | 2383 | { |
1da177e4 LT |
2384 | clientid_t *clientid = &open->op_clientid; |
2385 | struct nfs4_client *clp = NULL; | |
2386 | unsigned int strhashval; | |
2387 | struct nfs4_stateowner *sop = NULL; | |
2388 | ||
1da177e4 | 2389 | if (!check_name(open->op_owner)) |
0f442aa2 | 2390 | return nfserr_inval; |
1da177e4 LT |
2391 | |
2392 | if (STALE_CLIENTID(&open->op_clientid)) | |
2393 | return nfserr_stale_clientid; | |
2394 | ||
2395 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2396 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2397 | open->op_stateowner = sop; |
2398 | if (!sop) { | |
2399 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2400 | clp = find_confirmed_client(clientid); |
2401 | if (clp == NULL) | |
0f442aa2 BF |
2402 | return nfserr_expired; |
2403 | goto renew; | |
1da177e4 | 2404 | } |
6668958f AA |
2405 | /* When sessions are used, skip open sequenceid processing */ |
2406 | if (nfsd4_has_session(cstate)) | |
2407 | goto renew; | |
0f442aa2 BF |
2408 | if (!sop->so_confirmed) { |
2409 | /* Replace unconfirmed owners without checking for replay. */ | |
2410 | clp = sop->so_client; | |
f044ff83 | 2411 | release_openowner(sop); |
0f442aa2 BF |
2412 | open->op_stateowner = NULL; |
2413 | goto renew; | |
2414 | } | |
2415 | if (open->op_seqid == sop->so_seqid - 1) { | |
2416 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2417 | return nfserr_replay_me; |
0f442aa2 BF |
2418 | /* The original OPEN failed so spectacularly |
2419 | * that we don't even have replay data saved! | |
2420 | * Therefore, we have no choice but to continue | |
2421 | * processing this OPEN; presumably, we'll | |
2422 | * fail again for the same reason. | |
2423 | */ | |
2424 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2425 | goto renew; | |
2426 | } | |
2427 | if (open->op_seqid != sop->so_seqid) | |
2428 | return nfserr_bad_seqid; | |
1da177e4 | 2429 | renew: |
0f442aa2 BF |
2430 | if (open->op_stateowner == NULL) { |
2431 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2432 | if (sop == NULL) | |
2433 | return nfserr_resource; | |
2434 | open->op_stateowner = sop; | |
2435 | } | |
2436 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2437 | renew_client(sop->so_client); |
0f442aa2 | 2438 | return nfs_ok; |
1da177e4 LT |
2439 | } |
2440 | ||
b37ad28b | 2441 | static inline __be32 |
4a6e43e6 N |
2442 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2443 | { | |
2444 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2445 | return nfserr_openmode; | |
2446 | else | |
2447 | return nfs_ok; | |
2448 | } | |
2449 | ||
52f4fb43 N |
2450 | static struct nfs4_delegation * |
2451 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2452 | { | |
32b007b4 | 2453 | struct nfs4_delegation *dp; |
52f4fb43 | 2454 | |
acfdf5c3 | 2455 | spin_lock(&recall_lock); |
32b007b4 BF |
2456 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) |
2457 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) { | |
2458 | spin_unlock(&recall_lock); | |
2459 | return dp; | |
2460 | } | |
acfdf5c3 | 2461 | spin_unlock(&recall_lock); |
32b007b4 | 2462 | return NULL; |
52f4fb43 N |
2463 | } |
2464 | ||
24a0111e BF |
2465 | int share_access_to_flags(u32 share_access) |
2466 | { | |
2467 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2468 | ||
2469 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2470 | } | |
2471 | ||
b37ad28b | 2472 | static __be32 |
567d9829 N |
2473 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2474 | struct nfs4_delegation **dp) | |
2475 | { | |
2476 | int flags; | |
b37ad28b | 2477 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2478 | |
2479 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2480 | if (*dp == NULL) | |
c44c5eeb | 2481 | goto out; |
24a0111e | 2482 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2483 | status = nfs4_check_delegmode(*dp, flags); |
2484 | if (status) | |
2485 | *dp = NULL; | |
c44c5eeb N |
2486 | out: |
2487 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2488 | return nfs_ok; | |
2489 | if (status) | |
2490 | return status; | |
2491 | open->op_stateowner->so_confirmed = 1; | |
2492 | return nfs_ok; | |
567d9829 N |
2493 | } |
2494 | ||
b37ad28b | 2495 | static __be32 |
1da177e4 LT |
2496 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2497 | { | |
2498 | struct nfs4_stateid *local; | |
b37ad28b | 2499 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2500 | struct nfs4_stateowner *sop = open->op_stateowner; |
2501 | ||
8beefa24 | 2502 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2503 | /* ignore lock owners */ |
2504 | if (local->st_stateowner->so_is_open_owner == 0) | |
2505 | continue; | |
2506 | /* remember if we have seen this open owner */ | |
2507 | if (local->st_stateowner == sop) | |
2508 | *stpp = local; | |
2509 | /* check for conflicting share reservations */ | |
2510 | if (!test_share(local, open)) | |
2511 | goto out; | |
2512 | } | |
2513 | status = 0; | |
2514 | out: | |
2515 | return status; | |
2516 | } | |
2517 | ||
5ac049ac N |
2518 | static inline struct nfs4_stateid * |
2519 | nfs4_alloc_stateid(void) | |
2520 | { | |
2521 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2522 | } | |
2523 | ||
21fb4016 BF |
2524 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2525 | { | |
2526 | int flags = 0; | |
2527 | ||
2528 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2529 | flags |= NFSD_MAY_READ; | |
2530 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2531 | flags |= NFSD_MAY_WRITE; | |
2532 | return flags; | |
2533 | } | |
2534 | ||
f9d7562f BF |
2535 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file |
2536 | *fp, struct svc_fh *cur_fh, u32 nfs4_access) | |
2537 | { | |
2538 | __be32 status; | |
2539 | int oflag = nfs4_access_to_omode(nfs4_access); | |
2540 | int access = nfs4_access_to_access(nfs4_access); | |
2541 | ||
2542 | if (!fp->fi_fds[oflag]) { | |
2543 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2544 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2545 | if (status) |
2546 | return status; | |
2547 | } | |
2548 | nfs4_file_get_access(fp, oflag); | |
2549 | ||
2550 | return nfs_ok; | |
2551 | } | |
2552 | ||
b37ad28b | 2553 | static __be32 |
1da177e4 | 2554 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
f9d7562f BF |
2555 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2556 | struct nfsd4_open *open) | |
1da177e4 LT |
2557 | { |
2558 | struct nfs4_stateid *stp; | |
f9d7562f | 2559 | __be32 status; |
1da177e4 | 2560 | |
5ac049ac | 2561 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2562 | if (stp == NULL) |
2563 | return nfserr_resource; | |
2564 | ||
f9d7562f BF |
2565 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open->op_share_access); |
2566 | if (status) { | |
2567 | kmem_cache_free(stateid_slab, stp); | |
2568 | return status; | |
1da177e4 | 2569 | } |
1da177e4 LT |
2570 | *stpp = stp; |
2571 | return 0; | |
2572 | } | |
2573 | ||
b37ad28b | 2574 | static inline __be32 |
1da177e4 LT |
2575 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2576 | struct nfsd4_open *open) | |
2577 | { | |
2578 | struct iattr iattr = { | |
2579 | .ia_valid = ATTR_SIZE, | |
2580 | .ia_size = 0, | |
2581 | }; | |
2582 | if (!open->op_truncate) | |
2583 | return 0; | |
2584 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2585 | return nfserr_inval; |
1da177e4 LT |
2586 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2587 | } | |
2588 | ||
b37ad28b | 2589 | static __be32 |
f9d7562f | 2590 | 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 | 2591 | { |
7d947842 BF |
2592 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2593 | bool new_access; | |
b37ad28b | 2594 | __be32 status; |
1da177e4 | 2595 | |
7d947842 | 2596 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2597 | if (new_access) { |
7d947842 | 2598 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, op_share_access); |
f9d7562f BF |
2599 | if (status) |
2600 | return status; | |
6c26d08f | 2601 | } |
1da177e4 LT |
2602 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2603 | if (status) { | |
f9d7562f BF |
2604 | if (new_access) { |
2605 | int oflag = nfs4_access_to_omode(new_access); | |
2606 | nfs4_file_put_access(fp, oflag); | |
2607 | } | |
1da177e4 LT |
2608 | return status; |
2609 | } | |
2610 | /* remember the open */ | |
24a0111e | 2611 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2612 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2613 | |
2614 | return nfs_ok; | |
2615 | } | |
2616 | ||
2617 | ||
1da177e4 | 2618 | static void |
37515177 | 2619 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2620 | { |
37515177 N |
2621 | open->op_stateowner->so_confirmed = 1; |
2622 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2623 | } |
2624 | ||
14a24e99 BF |
2625 | /* Should we give out recallable state?: */ |
2626 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2627 | { | |
2628 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2629 | return true; | |
2630 | /* | |
2631 | * In the sessions case, since we don't have to establish a | |
2632 | * separate connection for callbacks, we assume it's OK | |
2633 | * until we hear otherwise: | |
2634 | */ | |
2635 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2636 | } | |
2637 | ||
22d38c4c BF |
2638 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2639 | { | |
2640 | struct file_lock *fl; | |
2641 | ||
2642 | fl = locks_alloc_lock(); | |
2643 | if (!fl) | |
2644 | return NULL; | |
2645 | locks_init_lock(fl); | |
2646 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2647 | fl->fl_flags = FL_LEASE; | |
2648 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2649 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2650 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2651 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2652 | return fl; |
2653 | } | |
2654 | ||
edab9782 BF |
2655 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2656 | { | |
acfdf5c3 | 2657 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2658 | struct file_lock *fl; |
2659 | int status; | |
2660 | ||
2661 | fl = nfs4_alloc_init_lease(dp, flag); | |
2662 | if (!fl) | |
2663 | return -ENOMEM; | |
acfdf5c3 BF |
2664 | fl->fl_file = find_readable_file(fp); |
2665 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
2666 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); | |
edab9782 | 2667 | if (status) { |
acfdf5c3 | 2668 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2669 | locks_free_lock(fl); |
2670 | return -ENOMEM; | |
2671 | } | |
acfdf5c3 BF |
2672 | fp->fi_lease = fl; |
2673 | fp->fi_deleg_file = fl->fl_file; | |
2674 | get_file(fp->fi_deleg_file); | |
2675 | atomic_set(&fp->fi_delegees, 1); | |
2676 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2677 | return 0; | |
2678 | } | |
2679 | ||
2680 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2681 | { | |
2682 | struct nfs4_file *fp = dp->dl_file; | |
2683 | ||
2684 | if (!fp->fi_lease) | |
2685 | return nfs4_setlease(dp, flag); | |
2686 | spin_lock(&recall_lock); | |
2687 | if (fp->fi_had_conflict) { | |
2688 | spin_unlock(&recall_lock); | |
2689 | return -EAGAIN; | |
2690 | } | |
2691 | atomic_inc(&fp->fi_delegees); | |
2692 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2693 | spin_unlock(&recall_lock); | |
2694 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
edab9782 BF |
2695 | return 0; |
2696 | } | |
2697 | ||
1da177e4 LT |
2698 | /* |
2699 | * Attempt to hand out a delegation. | |
2700 | */ | |
2701 | static void | |
2702 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2703 | { | |
2704 | struct nfs4_delegation *dp; | |
2705 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
14a24e99 | 2706 | int cb_up; |
1da177e4 LT |
2707 | int status, flag = 0; |
2708 | ||
14a24e99 | 2709 | cb_up = nfsd4_cb_channel_good(sop->so_client); |
1da177e4 | 2710 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2711 | open->op_recall = 0; |
2712 | switch (open->op_claim_type) { | |
2713 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2714 | if (!cb_up) |
7b190fec N |
2715 | open->op_recall = 1; |
2716 | flag = open->op_delegate_type; | |
2717 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2718 | goto out; | |
2719 | break; | |
2720 | case NFS4_OPEN_CLAIM_NULL: | |
2721 | /* Let's not give out any delegations till everyone's | |
2722 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2723 | if (locks_in_grace()) |
7b190fec | 2724 | goto out; |
2bf23875 | 2725 | if (!cb_up || !sop->so_confirmed) |
7b190fec N |
2726 | goto out; |
2727 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2728 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2729 | else | |
2730 | flag = NFS4_OPEN_DELEGATE_READ; | |
2731 | break; | |
2732 | default: | |
2733 | goto out; | |
2734 | } | |
1da177e4 LT |
2735 | |
2736 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
dd239cc0 BF |
2737 | if (dp == NULL) |
2738 | goto out_no_deleg; | |
acfdf5c3 | 2739 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2740 | if (status) |
dd239cc0 | 2741 | goto out_free; |
1da177e4 LT |
2742 | |
2743 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2744 | ||
8c10cbdb BH |
2745 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2746 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2747 | out: |
7b190fec N |
2748 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2749 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2750 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2751 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2752 | open->op_delegate_type = flag; |
dd239cc0 BF |
2753 | return; |
2754 | out_free: | |
acfdf5c3 | 2755 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2756 | out_no_deleg: |
2757 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2758 | goto out; | |
1da177e4 LT |
2759 | } |
2760 | ||
2761 | /* | |
2762 | * called with nfs4_lock_state() held. | |
2763 | */ | |
b37ad28b | 2764 | __be32 |
1da177e4 LT |
2765 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2766 | { | |
6668958f | 2767 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2768 | struct nfs4_file *fp = NULL; |
2769 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2770 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2771 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2772 | __be32 status; |
1da177e4 LT |
2773 | |
2774 | status = nfserr_inval; | |
d87a8ade | 2775 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2776 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2777 | goto out; |
2778 | /* | |
2779 | * Lookup file; if found, lookup stateid and check open request, | |
2780 | * and check for delegations in the process of being recalled. | |
2781 | * If not found, create the nfs4_file struct | |
2782 | */ | |
2783 | fp = find_file(ino); | |
2784 | if (fp) { | |
2785 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2786 | goto out; | |
c44c5eeb N |
2787 | status = nfs4_check_deleg(fp, open, &dp); |
2788 | if (status) | |
2789 | goto out; | |
1da177e4 | 2790 | } else { |
c44c5eeb N |
2791 | status = nfserr_bad_stateid; |
2792 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2793 | goto out; | |
1da177e4 LT |
2794 | status = nfserr_resource; |
2795 | fp = alloc_init_file(ino); | |
2796 | if (fp == NULL) | |
2797 | goto out; | |
2798 | } | |
2799 | ||
2800 | /* | |
2801 | * OPEN the file, or upgrade an existing OPEN. | |
2802 | * If truncate fails, the OPEN fails. | |
2803 | */ | |
2804 | if (stp) { | |
2805 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2806 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2807 | if (status) |
2808 | goto out; | |
444c2c07 | 2809 | update_stateid(&stp->st_stateid); |
1da177e4 | 2810 | } else { |
f9d7562f | 2811 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2812 | if (status) |
1da177e4 LT |
2813 | goto out; |
2814 | init_stateid(stp, fp, open); | |
2815 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2816 | if (status) { | |
2283963f | 2817 | release_open_stateid(stp); |
1da177e4 LT |
2818 | goto out; |
2819 | } | |
6668958f AA |
2820 | if (nfsd4_has_session(&resp->cstate)) |
2821 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2822 | } |
2823 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2824 | ||
4dc6ec00 | 2825 | if (nfsd4_has_session(&resp->cstate)) |
6668958f AA |
2826 | open->op_stateowner->so_confirmed = 1; |
2827 | ||
1da177e4 LT |
2828 | /* |
2829 | * Attempt to hand out a delegation. No error return, because the | |
2830 | * OPEN succeeds even if we fail. | |
2831 | */ | |
2832 | nfs4_open_delegation(current_fh, open, stp); | |
2833 | ||
2834 | status = nfs_ok; | |
2835 | ||
8c10cbdb BH |
2836 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2837 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2838 | out: |
13cd2184 N |
2839 | if (fp) |
2840 | put_nfs4_file(fp); | |
37515177 N |
2841 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2842 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2843 | /* |
2844 | * To finish the open response, we just need to set the rflags. | |
2845 | */ | |
2846 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2847 | if (!open->op_stateowner->so_confirmed && |
2848 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2849 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2850 | ||
2851 | return status; | |
2852 | } | |
2853 | ||
b37ad28b | 2854 | __be32 |
b591480b BF |
2855 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2856 | clientid_t *clid) | |
1da177e4 LT |
2857 | { |
2858 | struct nfs4_client *clp; | |
b37ad28b | 2859 | __be32 status; |
1da177e4 LT |
2860 | |
2861 | nfs4_lock_state(); | |
2862 | dprintk("process_renew(%08x/%08x): starting\n", | |
2863 | clid->cl_boot, clid->cl_id); | |
2864 | status = nfserr_stale_clientid; | |
2865 | if (STALE_CLIENTID(clid)) | |
2866 | goto out; | |
2867 | clp = find_confirmed_client(clid); | |
2868 | status = nfserr_expired; | |
2869 | if (clp == NULL) { | |
2870 | /* We assume the client took too long to RENEW. */ | |
2871 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2872 | goto out; | |
2873 | } | |
2874 | renew_client(clp); | |
2875 | status = nfserr_cb_path_down; | |
ea1da636 | 2876 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 2877 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
2878 | goto out; |
2879 | status = nfs_ok; | |
2880 | out: | |
2881 | nfs4_unlock_state(); | |
2882 | return status; | |
2883 | } | |
2884 | ||
af558e33 BF |
2885 | struct lock_manager nfsd4_manager = { |
2886 | }; | |
2887 | ||
a76b4319 | 2888 | static void |
af558e33 | 2889 | nfsd4_end_grace(void) |
a76b4319 N |
2890 | { |
2891 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2892 | nfsd4_recdir_purge_old(); |
af558e33 | 2893 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2894 | /* |
2895 | * Now that every NFSv4 client has had the chance to recover and | |
2896 | * to see the (possibly new, possibly shorter) lease time, we | |
2897 | * can safely set the next grace time to the current lease time: | |
2898 | */ | |
2899 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2900 | } |
2901 | ||
fd39ca9a | 2902 | static time_t |
1da177e4 LT |
2903 | nfs4_laundromat(void) |
2904 | { | |
2905 | struct nfs4_client *clp; | |
2906 | struct nfs4_stateowner *sop; | |
2907 | struct nfs4_delegation *dp; | |
2908 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
2909 | time_t cutoff = get_seconds() - nfsd4_lease; |
2910 | time_t t, clientid_val = nfsd4_lease; | |
2911 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
2912 | |
2913 | nfs4_lock_state(); | |
2914 | ||
2915 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2916 | if (locks_in_grace()) |
2917 | nfsd4_end_grace(); | |
36acb66b BH |
2918 | INIT_LIST_HEAD(&reaplist); |
2919 | spin_lock(&client_lock); | |
1da177e4 LT |
2920 | list_for_each_safe(pos, next, &client_lru) { |
2921 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2922 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2923 | t = clp->cl_time - cutoff; | |
2924 | if (clientid_val > t) | |
2925 | clientid_val = t; | |
2926 | break; | |
2927 | } | |
d7682988 BH |
2928 | if (atomic_read(&clp->cl_refcount)) { |
2929 | dprintk("NFSD: client in use (clientid %08x)\n", | |
2930 | clp->cl_clientid.cl_id); | |
2931 | continue; | |
2932 | } | |
2933 | unhash_client_locked(clp); | |
2934 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
2935 | } |
2936 | spin_unlock(&client_lock); | |
2937 | list_for_each_safe(pos, next, &reaplist) { | |
2938 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
2939 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
2940 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2941 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2942 | expire_client(clp); |
2943 | } | |
1da177e4 LT |
2944 | spin_lock(&recall_lock); |
2945 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2946 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2947 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
2948 | u = dp->dl_time - cutoff; | |
2949 | if (test_val > u) | |
2950 | test_val = u; | |
2951 | break; | |
2952 | } | |
1da177e4 LT |
2953 | list_move(&dp->dl_recall_lru, &reaplist); |
2954 | } | |
2955 | spin_unlock(&recall_lock); | |
2956 | list_for_each_safe(pos, next, &reaplist) { | |
2957 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2958 | list_del_init(&dp->dl_recall_lru); | |
2959 | unhash_delegation(dp); | |
2960 | } | |
cf07d2ea | 2961 | test_val = nfsd4_lease; |
1da177e4 LT |
2962 | list_for_each_safe(pos, next, &close_lru) { |
2963 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
2964 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
2965 | u = sop->so_time - cutoff; | |
2966 | if (test_val > u) | |
2967 | test_val = u; | |
2968 | break; | |
2969 | } | |
2970 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
2971 | sop->so_id); | |
f044ff83 | 2972 | release_openowner(sop); |
1da177e4 LT |
2973 | } |
2974 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
2975 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
2976 | nfs4_unlock_state(); | |
2977 | return clientid_val; | |
2978 | } | |
2979 | ||
a254b246 HH |
2980 | static struct workqueue_struct *laundry_wq; |
2981 | static void laundromat_main(struct work_struct *); | |
2982 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
2983 | ||
2984 | static void | |
c4028958 | 2985 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
2986 | { |
2987 | time_t t; | |
2988 | ||
2989 | t = nfs4_laundromat(); | |
2990 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 2991 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
2992 | } |
2993 | ||
fd39ca9a | 2994 | static struct nfs4_stateowner * |
f8816512 N |
2995 | search_close_lru(u32 st_id, int flags) |
2996 | { | |
1da177e4 LT |
2997 | struct nfs4_stateowner *local = NULL; |
2998 | ||
1da177e4 LT |
2999 | if (flags & CLOSE_STATE) { |
3000 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
3001 | if (local->so_id == st_id) | |
3002 | return local; | |
3003 | } | |
3004 | } | |
3005 | return NULL; | |
3006 | } | |
3007 | ||
3008 | static inline int | |
3009 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
3010 | { | |
f9d7562f | 3011 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
3012 | } |
3013 | ||
3014 | static int | |
3015 | STALE_STATEID(stateid_t *stateid) | |
3016 | { | |
e4e83ea4 BF |
3017 | if (stateid->si_boot == boot_time) |
3018 | return 0; | |
3019 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3020 | STATEID_VAL(stateid)); |
e4e83ea4 | 3021 | return 1; |
1da177e4 LT |
3022 | } |
3023 | ||
3024 | static inline int | |
3025 | access_permit_read(unsigned long access_bmap) | |
3026 | { | |
3027 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3028 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3029 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3030 | } | |
3031 | ||
3032 | static inline int | |
3033 | access_permit_write(unsigned long access_bmap) | |
3034 | { | |
3035 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3036 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3037 | } | |
3038 | ||
3039 | static | |
b37ad28b | 3040 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 3041 | { |
b37ad28b | 3042 | __be32 status = nfserr_openmode; |
1da177e4 | 3043 | |
02921914 BF |
3044 | /* For lock stateid's, we test the parent open, not the lock: */ |
3045 | if (stp->st_openstp) | |
3046 | stp = stp->st_openstp; | |
1da177e4 LT |
3047 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3048 | goto out; | |
3049 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3050 | goto out; | |
3051 | status = nfs_ok; | |
3052 | out: | |
3053 | return status; | |
3054 | } | |
3055 | ||
b37ad28b | 3056 | static inline __be32 |
1da177e4 LT |
3057 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3058 | { | |
203a8c8e | 3059 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3060 | return nfs_ok; |
af558e33 | 3061 | else if (locks_in_grace()) { |
25985edc | 3062 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3063 | * conflicting state; so we must wait out the grace period. */ |
3064 | return nfserr_grace; | |
3065 | } else if (flags & WR_STATE) | |
3066 | return nfs4_share_conflict(current_fh, | |
3067 | NFS4_SHARE_DENY_WRITE); | |
3068 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3069 | return nfs4_share_conflict(current_fh, | |
3070 | NFS4_SHARE_DENY_READ); | |
3071 | } | |
3072 | ||
3073 | /* | |
3074 | * Allow READ/WRITE during grace period on recovered state only for files | |
3075 | * that are not able to provide mandatory locking. | |
3076 | */ | |
3077 | static inline int | |
18f82731 | 3078 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3079 | { |
203a8c8e | 3080 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3081 | } |
3082 | ||
6668958f | 3083 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 3084 | { |
6668958f AA |
3085 | /* |
3086 | * When sessions are used the stateid generation number is ignored | |
3087 | * when it is zero. | |
3088 | */ | |
3089 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
3090 | goto out; | |
3091 | ||
0836f587 BF |
3092 | /* If the client sends us a stateid from the future, it's buggy: */ |
3093 | if (in->si_generation > ref->si_generation) | |
3094 | return nfserr_bad_stateid; | |
3095 | /* | |
3096 | * The following, however, can happen. For example, if the | |
3097 | * client sends an open and some IO at the same time, the open | |
3098 | * may bump si_generation while the IO is still in flight. | |
3099 | * Thanks to hard links and renames, the client never knows what | |
3100 | * file an open will affect. So it could avoid that situation | |
3101 | * only by serializing all opens and IO from the same open | |
3102 | * owner. To recover from the old_stateid error, the client | |
3103 | * will just have to retry the IO: | |
3104 | */ | |
3105 | if (in->si_generation < ref->si_generation) | |
3106 | return nfserr_old_stateid; | |
6668958f | 3107 | out: |
0836f587 BF |
3108 | return nfs_ok; |
3109 | } | |
3110 | ||
3e633079 BF |
3111 | static int is_delegation_stateid(stateid_t *stateid) |
3112 | { | |
3113 | return stateid->si_fileid == 0; | |
3114 | } | |
3115 | ||
1da177e4 LT |
3116 | /* |
3117 | * Checks for stateid operations | |
3118 | */ | |
b37ad28b | 3119 | __be32 |
dd453dfd BH |
3120 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3121 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
3122 | { |
3123 | struct nfs4_stateid *stp = NULL; | |
3124 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 3125 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3126 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3127 | __be32 status; |
1da177e4 | 3128 | |
1da177e4 LT |
3129 | if (filpp) |
3130 | *filpp = NULL; | |
3131 | ||
18f82731 | 3132 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3133 | return nfserr_grace; |
3134 | ||
6668958f AA |
3135 | if (nfsd4_has_session(cstate)) |
3136 | flags |= HAS_SESSION; | |
3137 | ||
1da177e4 LT |
3138 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3139 | return check_special_stateids(current_fh, stateid, flags); | |
3140 | ||
1da177e4 LT |
3141 | status = nfserr_stale_stateid; |
3142 | if (STALE_STATEID(stateid)) | |
3143 | goto out; | |
3144 | ||
33515142 BF |
3145 | /* |
3146 | * We assume that any stateid that has the current boot time, | |
3147 | * but that we can't find, is expired: | |
3148 | */ | |
3149 | status = nfserr_expired; | |
3e633079 | 3150 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 3151 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 3152 | if (!dp) |
1da177e4 | 3153 | goto out; |
6668958f AA |
3154 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
3155 | flags); | |
0c2a498f BF |
3156 | if (status) |
3157 | goto out; | |
dc9bf700 BF |
3158 | status = nfs4_check_delegmode(dp, flags); |
3159 | if (status) | |
3160 | goto out; | |
3161 | renew_client(dp->dl_client); | |
43b0178e | 3162 | if (filpp) { |
acfdf5c3 | 3163 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3164 | BUG_ON(!*filpp); |
3165 | } | |
1da177e4 | 3166 | } else { /* open or lock stateid */ |
a4455be0 | 3167 | stp = find_stateid(stateid, flags); |
e4e83ea4 | 3168 | if (!stp) |
1da177e4 | 3169 | goto out; |
33515142 | 3170 | status = nfserr_bad_stateid; |
6150ef0d | 3171 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
3172 | goto out; |
3173 | if (!stp->st_stateowner->so_confirmed) | |
3174 | goto out; | |
6668958f AA |
3175 | status = check_stateid_generation(stateid, &stp->st_stateid, |
3176 | flags); | |
0c2a498f BF |
3177 | if (status) |
3178 | goto out; | |
a4455be0 BF |
3179 | status = nfs4_check_openmode(stp, flags); |
3180 | if (status) | |
1da177e4 LT |
3181 | goto out; |
3182 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3183 | if (filpp) { |
3184 | if (flags & RD_STATE) | |
3185 | *filpp = find_readable_file(stp->st_file); | |
3186 | else | |
3187 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3188 | } |
1da177e4 LT |
3189 | } |
3190 | status = nfs_ok; | |
3191 | out: | |
3192 | return status; | |
3193 | } | |
3194 | ||
4c4cd222 N |
3195 | static inline int |
3196 | setlkflg (int type) | |
3197 | { | |
3198 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3199 | RD_STATE : WR_STATE; | |
3200 | } | |
1da177e4 LT |
3201 | |
3202 | /* | |
3203 | * Checks for sequence id mutating operations. | |
3204 | */ | |
b37ad28b | 3205 | static __be32 |
dd453dfd BH |
3206 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3207 | stateid_t *stateid, int flags, | |
3208 | struct nfs4_stateowner **sopp, | |
3209 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 3210 | { |
1da177e4 LT |
3211 | struct nfs4_stateid *stp; |
3212 | struct nfs4_stateowner *sop; | |
dd453dfd | 3213 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 3214 | __be32 status; |
1da177e4 | 3215 | |
8c10cbdb BH |
3216 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3217 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3218 | |
1da177e4 LT |
3219 | *stpp = NULL; |
3220 | *sopp = NULL; | |
3221 | ||
1da177e4 | 3222 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 3223 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 3224 | return nfserr_bad_stateid; |
1da177e4 LT |
3225 | } |
3226 | ||
1da177e4 | 3227 | if (STALE_STATEID(stateid)) |
3a4f98bb | 3228 | return nfserr_stale_stateid; |
6668958f AA |
3229 | |
3230 | if (nfsd4_has_session(cstate)) | |
3231 | flags |= HAS_SESSION; | |
3232 | ||
1da177e4 LT |
3233 | /* |
3234 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
3235 | * the confirmed flag is incorrecly set, or the generation | |
3236 | * number is incorrect. | |
1da177e4 | 3237 | */ |
f8816512 N |
3238 | stp = find_stateid(stateid, flags); |
3239 | if (stp == NULL) { | |
3240 | /* | |
3241 | * Also, we should make sure this isn't just the result of | |
3242 | * a replayed close: | |
3243 | */ | |
3244 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
33515142 | 3245 | /* It's not stale; let's assume it's expired: */ |
f8816512 | 3246 | if (sop == NULL) |
33515142 | 3247 | return nfserr_expired; |
f8816512 N |
3248 | *sopp = sop; |
3249 | goto check_replay; | |
3250 | } | |
1da177e4 | 3251 | |
39325bd0 BF |
3252 | *stpp = stp; |
3253 | *sopp = sop = stp->st_stateowner; | |
3254 | ||
4c4cd222 | 3255 | if (lock) { |
4c4cd222 | 3256 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 3257 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 3258 | int lkflg = 0; |
b37ad28b | 3259 | __be32 status; |
4c4cd222 N |
3260 | |
3261 | lkflg = setlkflg(lock->lk_type); | |
3262 | ||
3263 | if (lock->lk_is_new) { | |
599e0a22 BF |
3264 | if (!sop->so_is_open_owner) |
3265 | return nfserr_bad_stateid; | |
60adfc50 AA |
3266 | if (!(flags & HAS_SESSION) && |
3267 | !same_clid(&clp->cl_clientid, lockclid)) | |
3268 | return nfserr_bad_stateid; | |
599e0a22 BF |
3269 | /* stp is the open stateid */ |
3270 | status = nfs4_check_openmode(stp, lkflg); | |
3271 | if (status) | |
3272 | return status; | |
3273 | } else { | |
3274 | /* stp is the lock stateid */ | |
3275 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
3276 | if (status) | |
3277 | return status; | |
4c4cd222 | 3278 | } |
1da177e4 LT |
3279 | } |
3280 | ||
f3362737 | 3281 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 3282 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 3283 | return nfserr_bad_stateid; |
1da177e4 LT |
3284 | } |
3285 | ||
1da177e4 LT |
3286 | /* |
3287 | * We now validate the seqid and stateid generation numbers. | |
3288 | * For the moment, we ignore the possibility of | |
3289 | * generation number wraparound. | |
3290 | */ | |
6668958f | 3291 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
3292 | goto check_replay; |
3293 | ||
3a4f98bb | 3294 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 3295 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3296 | " unconfirmed stateowner!\n"); |
3297 | return nfserr_bad_stateid; | |
1da177e4 | 3298 | } |
3a4f98bb | 3299 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3300 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3301 | " confirmed yet!\n"); |
3302 | return nfserr_bad_stateid; | |
1da177e4 | 3303 | } |
6668958f | 3304 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
3305 | if (status) |
3306 | return status; | |
52fd004e | 3307 | renew_client(sop->so_client); |
3a4f98bb | 3308 | return nfs_ok; |
1da177e4 | 3309 | |
1da177e4 | 3310 | check_replay: |
bd9aac52 | 3311 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3312 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3313 | /* indicate replay to calling function */ |
a90b061c | 3314 | return nfserr_replay_me; |
1da177e4 | 3315 | } |
2fdada03 | 3316 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3317 | sop->so_seqid, seqid); |
3318 | *sopp = NULL; | |
3319 | return nfserr_bad_seqid; | |
1da177e4 LT |
3320 | } |
3321 | ||
b37ad28b | 3322 | __be32 |
ca364317 | 3323 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3324 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3325 | { |
b37ad28b | 3326 | __be32 status; |
1da177e4 LT |
3327 | struct nfs4_stateowner *sop; |
3328 | struct nfs4_stateid *stp; | |
3329 | ||
3330 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3331 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3332 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3333 | |
ca364317 | 3334 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3335 | if (status) |
3336 | return status; | |
1da177e4 LT |
3337 | |
3338 | nfs4_lock_state(); | |
3339 | ||
dd453dfd | 3340 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3341 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3342 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3343 | &oc->oc_stateowner, &stp, NULL))) |
3344 | goto out; | |
3345 | ||
3346 | sop = oc->oc_stateowner; | |
3347 | sop->so_confirmed = 1; | |
3348 | update_stateid(&stp->st_stateid); | |
3349 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3350 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3351 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
3352 | |
3353 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3354 | out: |
f2327d9a | 3355 | if (oc->oc_stateowner) { |
1da177e4 | 3356 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3357 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3358 | } |
1da177e4 LT |
3359 | nfs4_unlock_state(); |
3360 | return status; | |
3361 | } | |
3362 | ||
3363 | ||
3364 | /* | |
3365 | * unset all bits in union bitmap (bmap) that | |
3366 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
3367 | */ | |
3368 | static void | |
3369 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
3370 | { | |
3371 | int i; | |
3372 | for (i = 1; i < 4; i++) { | |
3373 | if ((i & access) != i) | |
3374 | __clear_bit(i, bmap); | |
3375 | } | |
3376 | } | |
3377 | ||
3378 | static void | |
3379 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3380 | { | |
3381 | int i; | |
3382 | for (i = 0; i < 4; i++) { | |
3383 | if ((i & deny) != i) | |
3384 | __clear_bit(i, bmap); | |
3385 | } | |
3386 | } | |
3387 | ||
b37ad28b | 3388 | __be32 |
ca364317 BF |
3389 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3390 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3391 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3392 | { |
b37ad28b | 3393 | __be32 status; |
1da177e4 LT |
3394 | struct nfs4_stateid *stp; |
3395 | unsigned int share_access; | |
3396 | ||
3397 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3398 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3399 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3400 | |
d87a8ade | 3401 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3402 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3403 | return nfserr_inval; |
3404 | ||
3405 | nfs4_lock_state(); | |
dd453dfd | 3406 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3407 | od->od_seqid, |
1da177e4 | 3408 | &od->od_stateid, |
f3362737 | 3409 | OPEN_STATE, |
1da177e4 LT |
3410 | &od->od_stateowner, &stp, NULL))) |
3411 | goto out; | |
3412 | ||
3413 | status = nfserr_inval; | |
3414 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3415 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3416 | stp->st_access_bmap, od->od_share_access); | |
3417 | goto out; | |
3418 | } | |
3419 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3420 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3421 | stp->st_deny_bmap, od->od_share_deny); | |
3422 | goto out; | |
3423 | } | |
3424 | set_access(&share_access, stp->st_access_bmap); | |
f9d7562f | 3425 | nfs4_file_downgrade(stp->st_file, share_access & ~od->od_share_access); |
1da177e4 LT |
3426 | |
3427 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
3428 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
3429 | ||
3430 | update_stateid(&stp->st_stateid); | |
3431 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3432 | status = nfs_ok; | |
3433 | out: | |
f2327d9a | 3434 | if (od->od_stateowner) { |
1da177e4 | 3435 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3436 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3437 | } |
1da177e4 LT |
3438 | nfs4_unlock_state(); |
3439 | return status; | |
3440 | } | |
3441 | ||
3442 | /* | |
3443 | * nfs4_unlock_state() called after encode | |
3444 | */ | |
b37ad28b | 3445 | __be32 |
ca364317 | 3446 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3447 | struct nfsd4_close *close) |
1da177e4 | 3448 | { |
b37ad28b | 3449 | __be32 status; |
1da177e4 LT |
3450 | struct nfs4_stateid *stp; |
3451 | ||
3452 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3453 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3454 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3455 | |
3456 | nfs4_lock_state(); | |
3457 | /* check close_lru for replay */ | |
dd453dfd | 3458 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3459 | close->cl_seqid, |
1da177e4 | 3460 | &close->cl_stateid, |
f3362737 | 3461 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3462 | &close->cl_stateowner, &stp, NULL))) |
3463 | goto out; | |
1da177e4 LT |
3464 | status = nfs_ok; |
3465 | update_stateid(&stp->st_stateid); | |
3466 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3467 | ||
04ef5954 | 3468 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3469 | release_open_stateid(stp); |
04ef5954 BF |
3470 | |
3471 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3472 | * released by the laundromat service after the lease period | |
3473 | * to enable us to handle CLOSE replay | |
3474 | */ | |
3475 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3476 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3477 | out: |
f2327d9a | 3478 | if (close->cl_stateowner) { |
1da177e4 | 3479 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3480 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3481 | } |
1da177e4 LT |
3482 | nfs4_unlock_state(); |
3483 | return status; | |
3484 | } | |
3485 | ||
b37ad28b | 3486 | __be32 |
ca364317 BF |
3487 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3488 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3489 | { |
203a8c8e BF |
3490 | struct nfs4_delegation *dp; |
3491 | stateid_t *stateid = &dr->dr_stateid; | |
3492 | struct inode *inode; | |
b37ad28b | 3493 | __be32 status; |
6668958f | 3494 | int flags = 0; |
1da177e4 | 3495 | |
ca364317 | 3496 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3497 | return status; |
3498 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3499 | |
6668958f AA |
3500 | if (nfsd4_has_session(cstate)) |
3501 | flags |= HAS_SESSION; | |
1da177e4 | 3502 | nfs4_lock_state(); |
203a8c8e BF |
3503 | status = nfserr_bad_stateid; |
3504 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3505 | goto out; | |
3506 | status = nfserr_stale_stateid; | |
3507 | if (STALE_STATEID(stateid)) | |
3508 | goto out; | |
7e0f7cf5 | 3509 | status = nfserr_bad_stateid; |
203a8c8e BF |
3510 | if (!is_delegation_stateid(stateid)) |
3511 | goto out; | |
33515142 | 3512 | status = nfserr_expired; |
203a8c8e | 3513 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3514 | if (!dp) |
203a8c8e | 3515 | goto out; |
6668958f | 3516 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3517 | if (status) |
3518 | goto out; | |
3519 | renew_client(dp->dl_client); | |
3520 | ||
3521 | unhash_delegation(dp); | |
1da177e4 | 3522 | out: |
203a8c8e BF |
3523 | nfs4_unlock_state(); |
3524 | ||
1da177e4 LT |
3525 | return status; |
3526 | } | |
3527 | ||
3528 | ||
3529 | /* | |
3530 | * Lock owner state (byte-range locks) | |
3531 | */ | |
3532 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3533 | #define LOCK_HASH_BITS 8 | |
3534 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3535 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3536 | ||
87df4de8 BH |
3537 | static inline u64 |
3538 | end_offset(u64 start, u64 len) | |
3539 | { | |
3540 | u64 end; | |
3541 | ||
3542 | end = start + len; | |
3543 | return end >= start ? end: NFS4_MAX_UINT64; | |
3544 | } | |
3545 | ||
3546 | /* last octet in a range */ | |
3547 | static inline u64 | |
3548 | last_byte_offset(u64 start, u64 len) | |
3549 | { | |
3550 | u64 end; | |
3551 | ||
3552 | BUG_ON(!len); | |
3553 | end = start + len; | |
3554 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3555 | } | |
3556 | ||
1da177e4 LT |
3557 | #define lockownerid_hashval(id) \ |
3558 | ((id) & LOCK_HASH_MASK) | |
3559 | ||
3560 | static inline unsigned int | |
3561 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3562 | struct xdr_netobj *ownername) | |
3563 | { | |
3564 | return (file_hashval(inode) + cl_id | |
3565 | + opaque_hashval(ownername->data, ownername->len)) | |
3566 | & LOCK_HASH_MASK; | |
3567 | } | |
3568 | ||
3569 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3570 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3571 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3572 | ||
fd39ca9a | 3573 | static struct nfs4_stateid * |
1da177e4 LT |
3574 | find_stateid(stateid_t *stid, int flags) |
3575 | { | |
9346eff0 | 3576 | struct nfs4_stateid *local; |
1da177e4 LT |
3577 | u32 st_id = stid->si_stateownerid; |
3578 | u32 f_id = stid->si_fileid; | |
3579 | unsigned int hashval; | |
3580 | ||
3581 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3582 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3583 | hashval = stateid_hashval(st_id, f_id); |
3584 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3585 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3586 | (local->st_stateid.si_fileid == f_id)) | |
3587 | return local; | |
3588 | } | |
3589 | } | |
9346eff0 KK |
3590 | |
3591 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3592 | hashval = stateid_hashval(st_id, f_id); |
3593 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3594 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3595 | (local->st_stateid.si_fileid == f_id)) | |
3596 | return local; | |
3597 | } | |
849823c5 | 3598 | } |
1da177e4 LT |
3599 | return NULL; |
3600 | } | |
3601 | ||
3602 | static struct nfs4_delegation * | |
3603 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3604 | { | |
13cd2184 N |
3605 | struct nfs4_file *fp; |
3606 | struct nfs4_delegation *dl; | |
1da177e4 | 3607 | |
8c10cbdb BH |
3608 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3609 | STATEID_VAL(stid)); | |
1da177e4 | 3610 | |
1da177e4 | 3611 | fp = find_file(ino); |
13cd2184 N |
3612 | if (!fp) |
3613 | return NULL; | |
3614 | dl = find_delegation_file(fp, stid); | |
3615 | put_nfs4_file(fp); | |
3616 | return dl; | |
1da177e4 LT |
3617 | } |
3618 | ||
3619 | /* | |
3620 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3621 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3622 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3623 | * locking, this prevents us from being completely protocol-compliant. The | |
3624 | * real solution to this problem is to start using unsigned file offsets in | |
3625 | * the VFS, but this is a very deep change! | |
3626 | */ | |
3627 | static inline void | |
3628 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3629 | { | |
3630 | if (lock->fl_start < 0) | |
3631 | lock->fl_start = OFFSET_MAX; | |
3632 | if (lock->fl_end < 0) | |
3633 | lock->fl_end = OFFSET_MAX; | |
3634 | } | |
3635 | ||
d5b9026a N |
3636 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3637 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3638 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3639 | }; |
1da177e4 LT |
3640 | |
3641 | static inline void | |
3642 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3643 | { | |
d5b9026a | 3644 | struct nfs4_stateowner *sop; |
1da177e4 | 3645 | |
d5b9026a N |
3646 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3647 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
1da177e4 LT |
3648 | kref_get(&sop->so_ref); |
3649 | deny->ld_sop = sop; | |
3650 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3651 | } else { |
3652 | deny->ld_sop = NULL; | |
3653 | deny->ld_clientid.cl_boot = 0; | |
3654 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3655 | } |
3656 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3657 | deny->ld_length = NFS4_MAX_UINT64; |
3658 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3659 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3660 | deny->ld_type = NFS4_READ_LT; | |
3661 | if (fl->fl_type != F_RDLCK) | |
3662 | deny->ld_type = NFS4_WRITE_LT; | |
3663 | } | |
3664 | ||
1da177e4 LT |
3665 | static struct nfs4_stateowner * |
3666 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3667 | struct xdr_netobj *owner) | |
3668 | { | |
3669 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3670 | struct nfs4_stateowner *op; | |
3671 | ||
3672 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3673 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3674 | return op; |
3675 | } | |
3676 | return NULL; | |
3677 | } | |
3678 | ||
3679 | /* | |
3680 | * Alloc a lock owner structure. | |
3681 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3682 | * occurred. |
1da177e4 LT |
3683 | * |
3684 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3685 | */ |
3686 | ||
3687 | static struct nfs4_stateowner * | |
3688 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3689 | struct nfs4_stateowner *sop; | |
3690 | struct nfs4_replay *rp; | |
3691 | unsigned int idhashval; | |
3692 | ||
3693 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3694 | return NULL; | |
3695 | idhashval = lockownerid_hashval(current_ownerid); | |
3696 | INIT_LIST_HEAD(&sop->so_idhash); | |
3697 | INIT_LIST_HEAD(&sop->so_strhash); | |
3698 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3699 | INIT_LIST_HEAD(&sop->so_stateids); |
3700 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3701 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3702 | sop->so_time = 0; | |
3703 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3704 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3705 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3706 | sop->so_is_open_owner = 0; |
3707 | sop->so_id = current_ownerid++; | |
3708 | sop->so_client = clp; | |
b59e3c0e NB |
3709 | /* It is the openowner seqid that will be incremented in encode in the |
3710 | * case of new lockowners; so increment the lock seqid manually: */ | |
3711 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3712 | sop->so_confirmed = 1; |
3713 | rp = &sop->so_replay; | |
de1ae286 | 3714 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3715 | rp->rp_buflen = 0; |
3716 | rp->rp_buf = rp->rp_ibuf; | |
3717 | return sop; | |
3718 | } | |
3719 | ||
fd39ca9a | 3720 | static struct nfs4_stateid * |
1da177e4 LT |
3721 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3722 | { | |
3723 | struct nfs4_stateid *stp; | |
3724 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3725 | ||
5ac049ac N |
3726 | stp = nfs4_alloc_stateid(); |
3727 | if (stp == NULL) | |
1da177e4 LT |
3728 | goto out; |
3729 | INIT_LIST_HEAD(&stp->st_hash); | |
3730 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3731 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3732 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3733 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3734 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3735 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3736 | stp->st_stateowner = sop; |
13cd2184 | 3737 | get_nfs4_file(fp); |
1da177e4 | 3738 | stp->st_file = fp; |
e4e83ea4 | 3739 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
3740 | stp->st_stateid.si_stateownerid = sop->so_id; |
3741 | stp->st_stateid.si_fileid = fp->fi_id; | |
3742 | stp->st_stateid.si_generation = 0; | |
0997b173 | 3743 | stp->st_access_bmap = 0; |
1da177e4 | 3744 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3745 | stp->st_openstp = open_stp; |
1da177e4 LT |
3746 | |
3747 | out: | |
3748 | return stp; | |
3749 | } | |
3750 | ||
fd39ca9a | 3751 | static int |
1da177e4 LT |
3752 | check_lock_length(u64 offset, u64 length) |
3753 | { | |
87df4de8 | 3754 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3755 | LOFF_OVERFLOW(offset, length))); |
3756 | } | |
3757 | ||
0997b173 BF |
3758 | static void get_lock_access(struct nfs4_stateid *lock_stp, u32 access) |
3759 | { | |
3760 | struct nfs4_file *fp = lock_stp->st_file; | |
3761 | int oflag = nfs4_access_to_omode(access); | |
3762 | ||
3763 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3764 | return; | |
3765 | nfs4_file_get_access(fp, oflag); | |
3766 | __set_bit(access, &lock_stp->st_access_bmap); | |
3767 | } | |
3768 | ||
1da177e4 LT |
3769 | /* |
3770 | * LOCK operation | |
3771 | */ | |
b37ad28b | 3772 | __be32 |
ca364317 | 3773 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3774 | struct nfsd4_lock *lock) |
1da177e4 | 3775 | { |
3e9e3dbe | 3776 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3777 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 | 3778 | struct nfs4_stateid *lock_stp; |
7d947842 BF |
3779 | struct nfs4_file *fp; |
3780 | struct file *filp = NULL; | |
1da177e4 | 3781 | struct file_lock file_lock; |
8dc7c311 | 3782 | struct file_lock conflock; |
b37ad28b | 3783 | __be32 status = 0; |
1da177e4 | 3784 | unsigned int strhashval; |
b8dd7b9a | 3785 | int err; |
1da177e4 LT |
3786 | |
3787 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3788 | (long long) lock->lk_offset, | |
3789 | (long long) lock->lk_length); | |
3790 | ||
1da177e4 LT |
3791 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3792 | return nfserr_inval; | |
3793 | ||
ca364317 | 3794 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3795 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3796 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3797 | return status; | |
3798 | } | |
3799 | ||
1da177e4 LT |
3800 | nfs4_lock_state(); |
3801 | ||
3802 | if (lock->lk_is_new) { | |
893f8770 N |
3803 | /* |
3804 | * Client indicates that this is a new lockowner. | |
3805 | * Use open owner and open stateid to create lock owner and | |
3806 | * lock stateid. | |
3807 | */ | |
1da177e4 | 3808 | struct nfs4_stateid *open_stp = NULL; |
1da177e4 LT |
3809 | |
3810 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3811 | if (!nfsd4_has_session(cstate) && |
3812 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3813 | goto out; |
1da177e4 | 3814 | |
1da177e4 | 3815 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3816 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3817 | lock->lk_new_open_seqid, |
3818 | &lock->lk_new_open_stateid, | |
f3362737 | 3819 | OPEN_STATE, |
3a65588a | 3820 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 3821 | lock); |
37515177 | 3822 | if (status) |
1da177e4 | 3823 | goto out; |
3a65588a | 3824 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
3825 | /* create lockowner and lock stateid */ |
3826 | fp = open_stp->st_file; | |
3827 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3828 | open_sop->so_client->cl_clientid.cl_id, | |
3829 | &lock->v.new.owner); | |
3e9e3dbe N |
3830 | /* XXX: Do we need to check for duplicate stateowners on |
3831 | * the same file, or should they just be allowed (and | |
3832 | * create new stateids)? */ | |
1da177e4 | 3833 | status = nfserr_resource; |
b59e3c0e NB |
3834 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3835 | open_sop->so_client, open_stp, lock); | |
3836 | if (lock_sop == NULL) | |
1da177e4 | 3837 | goto out; |
b59e3c0e | 3838 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3839 | if (lock_stp == NULL) |
1da177e4 | 3840 | goto out; |
1da177e4 LT |
3841 | } else { |
3842 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3843 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3844 | lock->lk_old_lock_seqid, |
3845 | &lock->lk_old_lock_stateid, | |
f3362737 | 3846 | LOCK_STATE, |
3a65588a | 3847 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
3848 | if (status) |
3849 | goto out; | |
3a65588a | 3850 | lock_sop = lock->lk_replay_owner; |
7d947842 | 3851 | fp = lock_stp->st_file; |
1da177e4 | 3852 | } |
3a65588a | 3853 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 | 3854 | |
0dd395dc | 3855 | status = nfserr_grace; |
af558e33 | 3856 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3857 | goto out; |
3858 | status = nfserr_no_grace; | |
af558e33 | 3859 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3860 | goto out; |
3861 | ||
1da177e4 LT |
3862 | locks_init_lock(&file_lock); |
3863 | switch (lock->lk_type) { | |
3864 | case NFS4_READ_LT: | |
3865 | case NFS4_READW_LT: | |
0997b173 BF |
3866 | filp = find_readable_file(lock_stp->st_file); |
3867 | if (filp) | |
3868 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 3869 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 3870 | break; |
1da177e4 LT |
3871 | case NFS4_WRITE_LT: |
3872 | case NFS4_WRITEW_LT: | |
0997b173 BF |
3873 | filp = find_writeable_file(lock_stp->st_file); |
3874 | if (filp) | |
3875 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 3876 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 3877 | break; |
1da177e4 LT |
3878 | default: |
3879 | status = nfserr_inval; | |
3880 | goto out; | |
3881 | } | |
f9d7562f BF |
3882 | if (!filp) { |
3883 | status = nfserr_openmode; | |
3884 | goto out; | |
3885 | } | |
b59e3c0e | 3886 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3887 | file_lock.fl_pid = current->tgid; |
3888 | file_lock.fl_file = filp; | |
3889 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3890 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3891 | |
3892 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3893 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3894 | nfs4_transform_lock_offset(&file_lock); |
3895 | ||
3896 | /* | |
3897 | * Try to lock the file in the VFS. | |
3898 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3899 | */ | |
3900 | ||
529d7b2a | 3901 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 3902 | switch (-err) { |
1da177e4 LT |
3903 | case 0: /* success! */ |
3904 | update_stateid(&lock_stp->st_stateid); | |
3905 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
3906 | sizeof(stateid_t)); | |
b8dd7b9a | 3907 | status = 0; |
eb76b3fd AA |
3908 | break; |
3909 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3910 | status = nfserr_denied; | |
3911 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3912 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3913 | break; | |
1da177e4 LT |
3914 | case (EDEADLK): |
3915 | status = nfserr_deadlock; | |
eb76b3fd | 3916 | break; |
1da177e4 | 3917 | default: |
fd85b817 | 3918 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
3919 | status = nfserr_resource; |
3920 | break; | |
1da177e4 | 3921 | } |
1da177e4 | 3922 | out: |
8a280510 | 3923 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3924 | release_lockowner(lock_sop); |
3a65588a BF |
3925 | if (lock->lk_replay_owner) { |
3926 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 3927 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 3928 | } |
1da177e4 LT |
3929 | nfs4_unlock_state(); |
3930 | return status; | |
3931 | } | |
3932 | ||
55ef1274 BF |
3933 | /* |
3934 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
3935 | * so we do a temporary open here just to get an open file to pass to | |
3936 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
3937 | * inode operation.) | |
3938 | */ | |
3939 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
3940 | { | |
3941 | struct file *file; | |
3942 | int err; | |
3943 | ||
3944 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
3945 | if (err) | |
3946 | return err; | |
3947 | err = vfs_test_lock(file, lock); | |
3948 | nfsd_close(file); | |
3949 | return err; | |
3950 | } | |
3951 | ||
1da177e4 LT |
3952 | /* |
3953 | * LOCKT operation | |
3954 | */ | |
b37ad28b | 3955 | __be32 |
ca364317 BF |
3956 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3957 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
3958 | { |
3959 | struct inode *inode; | |
1da177e4 | 3960 | struct file_lock file_lock; |
fd85b817 | 3961 | int error; |
b37ad28b | 3962 | __be32 status; |
1da177e4 | 3963 | |
af558e33 | 3964 | if (locks_in_grace()) |
1da177e4 LT |
3965 | return nfserr_grace; |
3966 | ||
3967 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
3968 | return nfserr_inval; | |
3969 | ||
3970 | lockt->lt_stateowner = NULL; | |
3971 | nfs4_lock_state(); | |
3972 | ||
3973 | status = nfserr_stale_clientid; | |
60adfc50 | 3974 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 3975 | goto out; |
1da177e4 | 3976 | |
ca364317 | 3977 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 3978 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
3979 | if (status == nfserr_symlink) |
3980 | status = nfserr_inval; | |
3981 | goto out; | |
3982 | } | |
3983 | ||
ca364317 | 3984 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
3985 | locks_init_lock(&file_lock); |
3986 | switch (lockt->lt_type) { | |
3987 | case NFS4_READ_LT: | |
3988 | case NFS4_READW_LT: | |
3989 | file_lock.fl_type = F_RDLCK; | |
3990 | break; | |
3991 | case NFS4_WRITE_LT: | |
3992 | case NFS4_WRITEW_LT: | |
3993 | file_lock.fl_type = F_WRLCK; | |
3994 | break; | |
3995 | default: | |
2fdada03 | 3996 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
3997 | status = nfserr_inval; |
3998 | goto out; | |
3999 | } | |
4000 | ||
4001 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
4002 | &lockt->lt_clientid, &lockt->lt_owner); | |
4003 | if (lockt->lt_stateowner) | |
4004 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
4005 | file_lock.fl_pid = current->tgid; | |
4006 | file_lock.fl_flags = FL_POSIX; | |
4007 | ||
4008 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4009 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4010 | |
4011 | nfs4_transform_lock_offset(&file_lock); | |
4012 | ||
1da177e4 | 4013 | status = nfs_ok; |
55ef1274 | 4014 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4015 | if (error) { |
4016 | status = nfserrno(error); | |
4017 | goto out; | |
4018 | } | |
9d6a8c5c | 4019 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4020 | status = nfserr_denied; |
9d6a8c5c | 4021 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4022 | } |
4023 | out: | |
4024 | nfs4_unlock_state(); | |
4025 | return status; | |
4026 | } | |
4027 | ||
b37ad28b | 4028 | __be32 |
ca364317 | 4029 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4030 | struct nfsd4_locku *locku) |
1da177e4 LT |
4031 | { |
4032 | struct nfs4_stateid *stp; | |
4033 | struct file *filp = NULL; | |
4034 | struct file_lock file_lock; | |
b37ad28b | 4035 | __be32 status; |
b8dd7b9a | 4036 | int err; |
1da177e4 LT |
4037 | |
4038 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4039 | (long long) locku->lu_offset, | |
4040 | (long long) locku->lu_length); | |
4041 | ||
4042 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4043 | return nfserr_inval; | |
4044 | ||
4045 | nfs4_lock_state(); | |
4046 | ||
dd453dfd | 4047 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
4048 | locku->lu_seqid, |
4049 | &locku->lu_stateid, | |
f3362737 | 4050 | LOCK_STATE, |
1da177e4 LT |
4051 | &locku->lu_stateowner, &stp, NULL))) |
4052 | goto out; | |
4053 | ||
f9d7562f BF |
4054 | filp = find_any_file(stp->st_file); |
4055 | if (!filp) { | |
4056 | status = nfserr_lock_range; | |
4057 | goto out; | |
4058 | } | |
1da177e4 LT |
4059 | BUG_ON(!filp); |
4060 | locks_init_lock(&file_lock); | |
4061 | file_lock.fl_type = F_UNLCK; | |
4062 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
4063 | file_lock.fl_pid = current->tgid; | |
4064 | file_lock.fl_file = filp; | |
4065 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4066 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4067 | file_lock.fl_start = locku->lu_offset; |
4068 | ||
87df4de8 | 4069 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4070 | nfs4_transform_lock_offset(&file_lock); |
4071 | ||
4072 | /* | |
4073 | * Try to unlock the file in the VFS. | |
4074 | */ | |
fd85b817 | 4075 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4076 | if (err) { |
fd85b817 | 4077 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4078 | goto out_nfserr; |
4079 | } | |
4080 | /* | |
4081 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4082 | */ | |
4083 | update_stateid(&stp->st_stateid); | |
4084 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
4085 | ||
4086 | out: | |
f2327d9a | 4087 | if (locku->lu_stateowner) { |
1da177e4 | 4088 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 4089 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 4090 | } |
1da177e4 LT |
4091 | nfs4_unlock_state(); |
4092 | return status; | |
4093 | ||
4094 | out_nfserr: | |
b8dd7b9a | 4095 | status = nfserrno(err); |
1da177e4 LT |
4096 | goto out; |
4097 | } | |
4098 | ||
4099 | /* | |
4100 | * returns | |
4101 | * 1: locks held by lockowner | |
4102 | * 0: no locks held by lockowner | |
4103 | */ | |
4104 | static int | |
f9d7562f | 4105 | check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner) |
1da177e4 LT |
4106 | { |
4107 | struct file_lock **flpp; | |
f9d7562f | 4108 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4109 | int status = 0; |
4110 | ||
b89f4321 | 4111 | lock_flocks(); |
1da177e4 | 4112 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4113 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4114 | status = 1; |
4115 | goto out; | |
796dadfd | 4116 | } |
1da177e4 LT |
4117 | } |
4118 | out: | |
b89f4321 | 4119 | unlock_flocks(); |
1da177e4 LT |
4120 | return status; |
4121 | } | |
4122 | ||
b37ad28b | 4123 | __be32 |
b591480b BF |
4124 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4125 | struct nfsd4_compound_state *cstate, | |
4126 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4127 | { |
4128 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
4129 | struct nfs4_stateowner *sop; |
4130 | struct nfs4_stateid *stp; | |
1da177e4 | 4131 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4132 | struct list_head matches; |
4133 | int i; | |
b37ad28b | 4134 | __be32 status; |
1da177e4 LT |
4135 | |
4136 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4137 | clid->cl_boot, clid->cl_id); | |
4138 | ||
4139 | /* XXX check for lease expiration */ | |
4140 | ||
4141 | status = nfserr_stale_clientid; | |
849823c5 | 4142 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4143 | return status; |
1da177e4 LT |
4144 | |
4145 | nfs4_lock_state(); | |
4146 | ||
3e9e3dbe N |
4147 | status = nfserr_locks_held; |
4148 | /* XXX: we're doing a linear search through all the lockowners. | |
4149 | * Yipes! For now we'll just hope clients aren't really using | |
4150 | * release_lockowner much, but eventually we have to fix these | |
4151 | * data structures. */ | |
4152 | INIT_LIST_HEAD(&matches); | |
4153 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4154 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 4155 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4156 | continue; |
4157 | list_for_each_entry(stp, &sop->so_stateids, | |
4158 | st_perstateowner) { | |
f9d7562f | 4159 | if (check_for_locks(stp->st_file, sop)) |
3e9e3dbe N |
4160 | goto out; |
4161 | /* Note: so_perclient unused for lockowners, | |
4162 | * so it's OK to fool with here. */ | |
4163 | list_add(&sop->so_perclient, &matches); | |
4164 | } | |
1da177e4 | 4165 | } |
3e9e3dbe N |
4166 | } |
4167 | /* Clients probably won't expect us to return with some (but not all) | |
4168 | * of the lockowner state released; so don't release any until all | |
4169 | * have been checked. */ | |
4170 | status = nfs_ok; | |
0fa822e4 N |
4171 | while (!list_empty(&matches)) { |
4172 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
4173 | so_perclient); | |
4174 | /* unhash_stateowner deletes so_perclient only | |
4175 | * for openowners. */ | |
4176 | list_del(&sop->so_perclient); | |
f044ff83 | 4177 | release_lockowner(sop); |
1da177e4 LT |
4178 | } |
4179 | out: | |
4180 | nfs4_unlock_state(); | |
4181 | return status; | |
4182 | } | |
4183 | ||
4184 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4185 | alloc_reclaim(void) |
1da177e4 | 4186 | { |
a55370a3 | 4187 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4188 | } |
4189 | ||
c7b9a459 | 4190 | int |
a1bcecd2 | 4191 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4192 | { |
4193 | unsigned int strhashval = clientstr_hashval(name); | |
4194 | struct nfs4_client *clp; | |
4195 | ||
e203d506 | 4196 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4197 | return clp ? 1 : 0; |
4198 | } | |
4199 | ||
1da177e4 LT |
4200 | /* |
4201 | * failure => all reset bets are off, nfserr_no_grace... | |
4202 | */ | |
190e4fbf N |
4203 | int |
4204 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4205 | { |
4206 | unsigned int strhashval; | |
4207 | struct nfs4_client_reclaim *crp = NULL; | |
4208 | ||
a55370a3 N |
4209 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4210 | crp = alloc_reclaim(); | |
1da177e4 LT |
4211 | if (!crp) |
4212 | return 0; | |
a55370a3 | 4213 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4214 | INIT_LIST_HEAD(&crp->cr_strhash); |
4215 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4216 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4217 | reclaim_str_hashtbl_size++; |
4218 | return 1; | |
4219 | } | |
4220 | ||
4221 | static void | |
4222 | nfs4_release_reclaim(void) | |
4223 | { | |
4224 | struct nfs4_client_reclaim *crp = NULL; | |
4225 | int i; | |
4226 | ||
1da177e4 LT |
4227 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4228 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4229 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4230 | struct nfs4_client_reclaim, cr_strhash); | |
4231 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4232 | kfree(crp); |
4233 | reclaim_str_hashtbl_size--; | |
4234 | } | |
4235 | } | |
4236 | BUG_ON(reclaim_str_hashtbl_size); | |
4237 | } | |
4238 | ||
4239 | /* | |
4240 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4241 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4242 | nfs4_find_reclaim_client(clientid_t *clid) |
4243 | { | |
4244 | unsigned int strhashval; | |
4245 | struct nfs4_client *clp; | |
4246 | struct nfs4_client_reclaim *crp = NULL; | |
4247 | ||
4248 | ||
4249 | /* find clientid in conf_id_hashtbl */ | |
4250 | clp = find_confirmed_client(clid); | |
4251 | if (clp == NULL) | |
4252 | return NULL; | |
4253 | ||
a55370a3 N |
4254 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4255 | clp->cl_name.len, clp->cl_name.data, | |
4256 | clp->cl_recdir); | |
1da177e4 LT |
4257 | |
4258 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4259 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4260 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4261 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4262 | return crp; |
4263 | } | |
4264 | } | |
4265 | return NULL; | |
4266 | } | |
4267 | ||
4268 | /* | |
4269 | * Called from OPEN. Look for clientid in reclaim list. | |
4270 | */ | |
b37ad28b | 4271 | __be32 |
1da177e4 LT |
4272 | nfs4_check_open_reclaim(clientid_t *clid) |
4273 | { | |
dfc83565 | 4274 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4275 | } |
4276 | ||
ac4d8ff2 | 4277 | /* initialization to perform at module load time: */ |
1da177e4 | 4278 | |
e8ff2a84 | 4279 | int |
ac4d8ff2 | 4280 | nfs4_state_init(void) |
1da177e4 | 4281 | { |
e8ff2a84 | 4282 | int i, status; |
1da177e4 | 4283 | |
e8ff2a84 BF |
4284 | status = nfsd4_init_slabs(); |
4285 | if (status) | |
4286 | return status; | |
1da177e4 LT |
4287 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4288 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4289 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4290 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4291 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4292 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4293 | } |
5282fd72 ME |
4294 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4295 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4296 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4297 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4298 | } | |
4299 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
4300 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
4301 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
4302 | } | |
4303 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
4304 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
4305 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
4306 | } | |
4307 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4308 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4309 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4310 | } | |
1da177e4 | 4311 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4312 | INIT_LIST_HEAD(&close_lru); |
4313 | INIT_LIST_HEAD(&client_lru); | |
4314 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4315 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4316 | return 0; |
ac4d8ff2 N |
4317 | } |
4318 | ||
190e4fbf N |
4319 | static void |
4320 | nfsd4_load_reboot_recovery_data(void) | |
4321 | { | |
4322 | int status; | |
4323 | ||
0964a3d3 N |
4324 | nfs4_lock_state(); |
4325 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 4326 | status = nfsd4_recdir_load(); |
0964a3d3 | 4327 | nfs4_unlock_state(); |
190e4fbf N |
4328 | if (status) |
4329 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4330 | } | |
4331 | ||
c2f1a551 MS |
4332 | /* |
4333 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4334 | * client may quite reasonably hang on to a delegation as long as it has | |
4335 | * the inode cached. This becomes an obvious problem the first time a | |
4336 | * client's inode cache approaches the size of the server's total memory. | |
4337 | * | |
4338 | * For now we avoid this problem by imposing a hard limit on the number | |
4339 | * of delegations, which varies according to the server's memory size. | |
4340 | */ | |
4341 | static void | |
4342 | set_max_delegations(void) | |
4343 | { | |
4344 | /* | |
4345 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4346 | * estimates suggest that in the worst case (where every delegation | |
4347 | * is for a different inode), a delegation could take about 1.5K, | |
4348 | * giving a worst case usage of about 6% of memory. | |
4349 | */ | |
4350 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4351 | } | |
4352 | ||
ac4d8ff2 N |
4353 | /* initialization to perform when the nfsd service is started: */ |
4354 | ||
29ab23cc | 4355 | static int |
ac4d8ff2 N |
4356 | __nfs4_state_start(void) |
4357 | { | |
b5a1a81e BF |
4358 | int ret; |
4359 | ||
1da177e4 | 4360 | boot_time = get_seconds(); |
af558e33 | 4361 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4362 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4363 | nfsd4_grace); |
b5a1a81e BF |
4364 | ret = set_callback_cred(); |
4365 | if (ret) | |
4366 | return -ENOMEM; | |
58da282b | 4367 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4368 | if (laundry_wq == NULL) |
4369 | return -ENOMEM; | |
b5a1a81e BF |
4370 | ret = nfsd4_create_callback_queue(); |
4371 | if (ret) | |
4372 | goto out_free_laundry; | |
e46b498c | 4373 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4374 | set_max_delegations(); |
b5a1a81e BF |
4375 | return 0; |
4376 | out_free_laundry: | |
4377 | destroy_workqueue(laundry_wq); | |
4378 | return ret; | |
1da177e4 LT |
4379 | } |
4380 | ||
29ab23cc | 4381 | int |
76a3550e | 4382 | nfs4_state_start(void) |
1da177e4 | 4383 | { |
190e4fbf | 4384 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4385 | return __nfs4_state_start(); |
1da177e4 LT |
4386 | } |
4387 | ||
1da177e4 LT |
4388 | static void |
4389 | __nfs4_state_shutdown(void) | |
4390 | { | |
4391 | int i; | |
4392 | struct nfs4_client *clp = NULL; | |
4393 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4394 | struct list_head *pos, *next, reaplist; |
4395 | ||
1da177e4 LT |
4396 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4397 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4398 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4399 | expire_client(clp); | |
4400 | } | |
4401 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4402 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4403 | expire_client(clp); | |
4404 | } | |
4405 | } | |
4406 | INIT_LIST_HEAD(&reaplist); | |
4407 | spin_lock(&recall_lock); | |
4408 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4409 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4410 | list_move(&dp->dl_recall_lru, &reaplist); | |
4411 | } | |
4412 | spin_unlock(&recall_lock); | |
4413 | list_for_each_safe(pos, next, &reaplist) { | |
4414 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4415 | list_del_init(&dp->dl_recall_lru); | |
4416 | unhash_delegation(dp); | |
4417 | } | |
4418 | ||
190e4fbf | 4419 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4420 | } |
4421 | ||
4422 | void | |
4423 | nfs4_state_shutdown(void) | |
4424 | { | |
afe2c511 | 4425 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4426 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4427 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4428 | nfs4_lock_state(); |
4429 | nfs4_release_reclaim(); | |
4430 | __nfs4_state_shutdown(); | |
1da177e4 | 4431 | nfs4_unlock_state(); |
c3935e30 | 4432 | nfsd4_destroy_callback_queue(); |
1da177e4 LT |
4433 | } |
4434 | ||
3dd98a3b JL |
4435 | /* |
4436 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4437 | * accessed when nfsd is starting. | |
4438 | */ | |
0964a3d3 N |
4439 | static void |
4440 | nfs4_set_recdir(char *recdir) | |
4441 | { | |
0964a3d3 | 4442 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4443 | } |
4444 | ||
4445 | /* | |
4446 | * Change the NFSv4 recovery directory to recdir. | |
4447 | */ | |
4448 | int | |
4449 | nfs4_reset_recoverydir(char *recdir) | |
4450 | { | |
4451 | int status; | |
a63bb996 | 4452 | struct path path; |
0964a3d3 | 4453 | |
a63bb996 | 4454 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4455 | if (status) |
4456 | return status; | |
4457 | status = -ENOTDIR; | |
a63bb996 | 4458 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4459 | nfs4_set_recdir(recdir); |
4460 | status = 0; | |
4461 | } | |
a63bb996 | 4462 | path_put(&path); |
0964a3d3 N |
4463 | return status; |
4464 | } | |
4465 | ||
3dd98a3b JL |
4466 | char * |
4467 | nfs4_recoverydir(void) | |
4468 | { | |
4469 | return user_recovery_dirname; | |
4470 | } |