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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
17456804 | 40 | #include <linux/pagemap.h> |
68e76ad0 | 41 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 42 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 43 | #include "xdr4.h" |
0a3adade | 44 | #include "vfs.h" |
1da177e4 LT |
45 | |
46 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
47 | ||
48 | /* Globals */ | |
cf07d2ea | 49 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 50 | time_t nfsd4_grace = 90; |
fd39ca9a | 51 | static time_t boot_time; |
1da177e4 LT |
52 | static u32 current_ownerid = 1; |
53 | static u32 current_fileid = 1; | |
54 | static u32 current_delegid = 1; | |
fd39ca9a N |
55 | static stateid_t zerostateid; /* bits all 0 */ |
56 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 57 | static u64 current_sessionid = 1; |
fd39ca9a N |
58 | |
59 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
60 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 61 | |
1da177e4 | 62 | /* forward declarations */ |
fd39ca9a | 63 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
e1ca12df BS |
64 | static struct nfs4_stateid * search_for_stateid(stateid_t *stid); |
65 | static struct nfs4_delegation * search_for_delegation(stateid_t *stid); | |
1da177e4 | 66 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
e1ca12df | 67 | static int check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner); |
1da177e4 | 68 | |
8b671b80 BF |
69 | /* Locking: */ |
70 | ||
71 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 72 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 73 | |
8b671b80 BF |
74 | /* |
75 | * Currently used for the del_recall_lru and file hash table. In an | |
76 | * effort to decrease the scope of the client_mutex, this spinlock may | |
77 | * eventually cover more: | |
78 | */ | |
79 | static DEFINE_SPINLOCK(recall_lock); | |
80 | ||
e18b890b CL |
81 | static struct kmem_cache *stateowner_slab = NULL; |
82 | static struct kmem_cache *file_slab = NULL; | |
83 | static struct kmem_cache *stateid_slab = NULL; | |
84 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 85 | |
1da177e4 LT |
86 | void |
87 | nfs4_lock_state(void) | |
88 | { | |
353ab6e9 | 89 | mutex_lock(&client_mutex); |
1da177e4 LT |
90 | } |
91 | ||
92 | void | |
93 | nfs4_unlock_state(void) | |
94 | { | |
353ab6e9 | 95 | mutex_unlock(&client_mutex); |
1da177e4 LT |
96 | } |
97 | ||
98 | static inline u32 | |
99 | opaque_hashval(const void *ptr, int nbytes) | |
100 | { | |
101 | unsigned char *cptr = (unsigned char *) ptr; | |
102 | ||
103 | u32 x = 0; | |
104 | while (nbytes--) { | |
105 | x *= 37; | |
106 | x += *cptr++; | |
107 | } | |
108 | return x; | |
109 | } | |
110 | ||
1da177e4 LT |
111 | static struct list_head del_recall_lru; |
112 | ||
13cd2184 N |
113 | static inline void |
114 | put_nfs4_file(struct nfs4_file *fi) | |
115 | { | |
8b671b80 BF |
116 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
117 | list_del(&fi->fi_hash); | |
118 | spin_unlock(&recall_lock); | |
119 | iput(fi->fi_inode); | |
120 | kmem_cache_free(file_slab, fi); | |
121 | } | |
13cd2184 N |
122 | } |
123 | ||
124 | static inline void | |
125 | get_nfs4_file(struct nfs4_file *fi) | |
126 | { | |
8b671b80 | 127 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
128 | } |
129 | ||
ef0f3390 | 130 | static int num_delegations; |
c2f1a551 | 131 | unsigned int max_delegations; |
ef0f3390 N |
132 | |
133 | /* | |
134 | * Open owner state (share locks) | |
135 | */ | |
136 | ||
137 | /* hash tables for nfs4_stateowner */ | |
138 | #define OWNER_HASH_BITS 8 | |
139 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
140 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
141 | ||
142 | #define ownerid_hashval(id) \ | |
143 | ((id) & OWNER_HASH_MASK) | |
144 | #define ownerstr_hashval(clientid, ownername) \ | |
145 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
146 | ||
147 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
148 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
149 | ||
150 | /* hash table for nfs4_file */ | |
151 | #define FILE_HASH_BITS 8 | |
152 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 153 | |
ef0f3390 N |
154 | /* hash table for (open)nfs4_stateid */ |
155 | #define STATEID_HASH_BITS 10 | |
156 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
157 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
158 | ||
159 | #define file_hashval(x) \ | |
160 | hash_ptr(x, FILE_HASH_BITS) | |
161 | #define stateid_hashval(owner_id, file_id) \ | |
162 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
163 | ||
164 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
165 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
166 | ||
998db52c | 167 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
168 | { |
169 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
170 | atomic_inc(&fp->fi_access[oflag]); | |
171 | } | |
172 | ||
998db52c BF |
173 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
174 | { | |
175 | if (oflag == O_RDWR) { | |
176 | __nfs4_file_get_access(fp, O_RDONLY); | |
177 | __nfs4_file_get_access(fp, O_WRONLY); | |
178 | } else | |
179 | __nfs4_file_get_access(fp, oflag); | |
180 | } | |
181 | ||
182 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
183 | { |
184 | if (fp->fi_fds[oflag]) { | |
185 | fput(fp->fi_fds[oflag]); | |
186 | fp->fi_fds[oflag] = NULL; | |
187 | } | |
188 | } | |
189 | ||
998db52c | 190 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
191 | { |
192 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
193 | nfs4_file_put_fd(fp, O_RDWR); | |
194 | nfs4_file_put_fd(fp, oflag); | |
195 | } | |
196 | } | |
197 | ||
998db52c BF |
198 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
199 | { | |
200 | if (oflag == O_RDWR) { | |
201 | __nfs4_file_put_access(fp, O_RDONLY); | |
202 | __nfs4_file_put_access(fp, O_WRONLY); | |
203 | } else | |
204 | __nfs4_file_put_access(fp, oflag); | |
205 | } | |
206 | ||
1da177e4 LT |
207 | static struct nfs4_delegation * |
208 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
209 | { | |
210 | struct nfs4_delegation *dp; | |
211 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
212 | |
213 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
214 | /* |
215 | * Major work on the lease subsystem (for example, to support | |
216 | * calbacks on stat) will be required before we can support | |
217 | * write delegations properly. | |
218 | */ | |
219 | if (type != NFS4_OPEN_DELEGATE_READ) | |
220 | return NULL; | |
47f9940c MS |
221 | if (fp->fi_had_conflict) |
222 | return NULL; | |
c2f1a551 | 223 | if (num_delegations > max_delegations) |
ef0f3390 | 224 | return NULL; |
5b2d21c1 N |
225 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
226 | if (dp == NULL) | |
1da177e4 | 227 | return dp; |
ef0f3390 | 228 | num_delegations++; |
ea1da636 N |
229 | INIT_LIST_HEAD(&dp->dl_perfile); |
230 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
231 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
232 | dp->dl_client = clp; | |
13cd2184 | 233 | get_nfs4_file(fp); |
1da177e4 | 234 | dp->dl_file = fp; |
1da177e4 | 235 | dp->dl_type = type; |
e4e83ea4 | 236 | dp->dl_stateid.si_boot = boot_time; |
1da177e4 LT |
237 | dp->dl_stateid.si_stateownerid = current_delegid++; |
238 | dp->dl_stateid.si_fileid = 0; | |
239 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 240 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
241 | dp->dl_time = 0; |
242 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 243 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
244 | return dp; |
245 | } | |
246 | ||
247 | void | |
248 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
249 | { | |
250 | if (atomic_dec_and_test(&dp->dl_count)) { | |
251 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 252 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 253 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 254 | num_delegations--; |
1da177e4 LT |
255 | } |
256 | } | |
257 | ||
acfdf5c3 | 258 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 259 | { |
acfdf5c3 BF |
260 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
261 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
262 | fp->fi_lease = NULL; | |
4ee63624 | 263 | fput(fp->fi_deleg_file); |
acfdf5c3 BF |
264 | fp->fi_deleg_file = NULL; |
265 | } | |
1da177e4 LT |
266 | } |
267 | ||
268 | /* Called under the state lock. */ | |
269 | static void | |
270 | unhash_delegation(struct nfs4_delegation *dp) | |
271 | { | |
ea1da636 | 272 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 273 | spin_lock(&recall_lock); |
5d926e8c | 274 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
275 | list_del_init(&dp->dl_recall_lru); |
276 | spin_unlock(&recall_lock); | |
acfdf5c3 | 277 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
278 | nfs4_put_delegation(dp); |
279 | } | |
280 | ||
281 | /* | |
282 | * SETCLIENTID state | |
283 | */ | |
284 | ||
36acb66b | 285 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
286 | static DEFINE_SPINLOCK(client_lock); |
287 | ||
1da177e4 LT |
288 | /* Hash tables for nfs4_clientid state */ |
289 | #define CLIENT_HASH_BITS 4 | |
290 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
291 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
292 | ||
293 | #define clientid_hashval(id) \ | |
294 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
295 | #define clientstr_hashval(name) \ |
296 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
297 | /* |
298 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
299 | * used in reboot/reset lease grace period processing | |
300 | * | |
301 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
302 | * setclientid_confirmed info. | |
303 | * | |
304 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
305 | * setclientid info. | |
306 | * | |
307 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
308 | * for lease renewal. | |
309 | * | |
310 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
311 | * for last close replay. | |
312 | */ | |
313 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
314 | static int reclaim_str_hashtbl_size = 0; | |
315 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
316 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
317 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
318 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
319 | static struct list_head client_lru; | |
320 | static struct list_head close_lru; | |
321 | ||
f9d7562f BF |
322 | /* |
323 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
324 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
325 | * only what share bits are currently in force, but also what | |
326 | * combinations of share bits previous opens have used. This allows us | |
327 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
328 | * return an error if the client attempt to downgrade to a combination | |
329 | * of share bits not explicable by closing some of its previous opens. | |
330 | * | |
331 | * XXX: This enforcement is actually incomplete, since we don't keep | |
332 | * track of access/deny bit combinations; so, e.g., we allow: | |
333 | * | |
334 | * OPEN allow read, deny write | |
335 | * OPEN allow both, deny none | |
336 | * DOWNGRADE allow read, deny none | |
337 | * | |
338 | * which we should reject. | |
339 | */ | |
340 | static void | |
341 | set_access(unsigned int *access, unsigned long bmap) { | |
342 | int i; | |
343 | ||
344 | *access = 0; | |
345 | for (i = 1; i < 4; i++) { | |
346 | if (test_bit(i, &bmap)) | |
347 | *access |= i; | |
348 | } | |
349 | } | |
350 | ||
351 | static void | |
352 | set_deny(unsigned int *deny, unsigned long bmap) { | |
353 | int i; | |
354 | ||
355 | *deny = 0; | |
356 | for (i = 0; i < 4; i++) { | |
357 | if (test_bit(i, &bmap)) | |
358 | *deny |= i ; | |
359 | } | |
360 | } | |
361 | ||
362 | static int | |
363 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
364 | unsigned int access, deny; | |
365 | ||
366 | set_access(&access, stp->st_access_bmap); | |
367 | set_deny(&deny, stp->st_deny_bmap); | |
368 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
369 | return 0; | |
370 | return 1; | |
371 | } | |
372 | ||
373 | static int nfs4_access_to_omode(u32 access) | |
374 | { | |
8f34a430 | 375 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
376 | case NFS4_SHARE_ACCESS_READ: |
377 | return O_RDONLY; | |
378 | case NFS4_SHARE_ACCESS_WRITE: | |
379 | return O_WRONLY; | |
380 | case NFS4_SHARE_ACCESS_BOTH: | |
381 | return O_RDWR; | |
382 | } | |
383 | BUG(); | |
384 | } | |
385 | ||
529d7b2a BF |
386 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
387 | { | |
388 | list_del(&stp->st_hash); | |
389 | list_del(&stp->st_perfile); | |
390 | list_del(&stp->st_perstateowner); | |
391 | } | |
392 | ||
393 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
394 | { | |
499f3edc | 395 | int i; |
0997b173 | 396 | |
23fcf2ec | 397 | if (stp->st_access_bmap) { |
499f3edc BF |
398 | for (i = 1; i < 4; i++) { |
399 | if (test_bit(i, &stp->st_access_bmap)) | |
400 | nfs4_file_put_access(stp->st_file, | |
401 | nfs4_access_to_omode(i)); | |
402 | } | |
23fcf2ec | 403 | } |
a96e5b90 | 404 | put_nfs4_file(stp->st_file); |
529d7b2a BF |
405 | kmem_cache_free(stateid_slab, stp); |
406 | } | |
407 | ||
408 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
409 | { | |
410 | struct file *file; | |
411 | ||
412 | unhash_generic_stateid(stp); | |
413 | file = find_any_file(stp->st_file); | |
414 | if (file) | |
415 | locks_remove_posix(file, (fl_owner_t)stp->st_stateowner); | |
416 | free_generic_stateid(stp); | |
417 | } | |
418 | ||
419 | static void unhash_lockowner(struct nfs4_stateowner *sop) | |
420 | { | |
421 | struct nfs4_stateid *stp; | |
422 | ||
423 | list_del(&sop->so_idhash); | |
424 | list_del(&sop->so_strhash); | |
425 | list_del(&sop->so_perstateid); | |
426 | while (!list_empty(&sop->so_stateids)) { | |
427 | stp = list_first_entry(&sop->so_stateids, | |
428 | struct nfs4_stateid, st_perstateowner); | |
429 | release_lock_stateid(stp); | |
430 | } | |
431 | } | |
432 | ||
433 | static void release_lockowner(struct nfs4_stateowner *sop) | |
434 | { | |
435 | unhash_lockowner(sop); | |
436 | nfs4_put_stateowner(sop); | |
437 | } | |
438 | ||
439 | static void | |
440 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
441 | { | |
442 | struct nfs4_stateowner *lock_sop; | |
443 | ||
444 | while (!list_empty(&open_stp->st_lockowners)) { | |
445 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
446 | struct nfs4_stateowner, so_perstateid); | |
447 | /* list_del(&open_stp->st_lockowners); */ | |
448 | BUG_ON(lock_sop->so_is_open_owner); | |
449 | release_lockowner(lock_sop); | |
450 | } | |
451 | } | |
452 | ||
2283963f BF |
453 | static void release_open_stateid(struct nfs4_stateid *stp) |
454 | { | |
455 | unhash_generic_stateid(stp); | |
456 | release_stateid_lockowners(stp); | |
2283963f BF |
457 | free_generic_stateid(stp); |
458 | } | |
459 | ||
f044ff83 | 460 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
461 | { |
462 | struct nfs4_stateid *stp; | |
463 | ||
464 | list_del(&sop->so_idhash); | |
465 | list_del(&sop->so_strhash); | |
f044ff83 BF |
466 | list_del(&sop->so_perclient); |
467 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 468 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
469 | stp = list_first_entry(&sop->so_stateids, |
470 | struct nfs4_stateid, st_perstateowner); | |
471 | release_open_stateid(stp); | |
f1d110ca BF |
472 | } |
473 | } | |
474 | ||
f044ff83 | 475 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 476 | { |
f044ff83 | 477 | unhash_openowner(sop); |
f1d110ca BF |
478 | list_del(&sop->so_close_lru); |
479 | nfs4_put_stateowner(sop); | |
480 | } | |
481 | ||
5282fd72 ME |
482 | #define SESSION_HASH_SIZE 512 |
483 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
484 | ||
485 | static inline int | |
486 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
487 | { | |
488 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
489 | ||
490 | return sid->sequence % SESSION_HASH_SIZE; | |
491 | } | |
492 | ||
493 | static inline void | |
494 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
495 | { | |
496 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
497 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
498 | } | |
499 | ||
ec6b5d7b AA |
500 | static void |
501 | gen_sessionid(struct nfsd4_session *ses) | |
502 | { | |
503 | struct nfs4_client *clp = ses->se_client; | |
504 | struct nfsd4_sessionid *sid; | |
505 | ||
506 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
507 | sid->clientid = clp->cl_clientid; | |
508 | sid->sequence = current_sessionid++; | |
509 | sid->reserved = 0; | |
510 | } | |
511 | ||
512 | /* | |
a649637c AA |
513 | * The protocol defines ca_maxresponssize_cached to include the size of |
514 | * the rpc header, but all we need to cache is the data starting after | |
515 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
516 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
517 | * value that is the number of bytes in our cache plus a few additional | |
518 | * bytes. In order to stay on the safe side, and not promise more than | |
519 | * we can cache, those additional bytes must be the minimum possible: 24 | |
520 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
521 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
522 | * for the SEQUENCE op response: | |
523 | */ | |
524 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
525 | ||
557ce264 AA |
526 | static void |
527 | free_session_slots(struct nfsd4_session *ses) | |
528 | { | |
529 | int i; | |
530 | ||
531 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
532 | kfree(ses->se_slots[i]); | |
533 | } | |
534 | ||
a649637c | 535 | /* |
efe0cb6d BF |
536 | * We don't actually need to cache the rpc and session headers, so we |
537 | * can allocate a little less for each slot: | |
538 | */ | |
539 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
540 | { | |
541 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
542 | } | |
543 | ||
5b6feee9 | 544 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 545 | { |
5b6feee9 BF |
546 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
547 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 548 | |
5b6feee9 BF |
549 | return size; |
550 | } | |
ec6b5d7b | 551 | |
5b6feee9 BF |
552 | /* |
553 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
554 | * re-negotiate active sessions and reduce their slot usage to make |
555 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 556 | */ |
5b6feee9 | 557 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 558 | { |
5b6feee9 | 559 | int avail; |
ec6b5d7b | 560 | |
5b6feee9 | 561 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 562 | |
5b6feee9 BF |
563 | spin_lock(&nfsd_drc_lock); |
564 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
565 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
566 | num = min_t(int, num, avail / slotsize); | |
567 | nfsd_drc_mem_used += num * slotsize; | |
568 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 569 | |
5b6feee9 BF |
570 | return num; |
571 | } | |
ec6b5d7b | 572 | |
5b6feee9 BF |
573 | static void nfsd4_put_drc_mem(int slotsize, int num) |
574 | { | |
4bd9b0f4 | 575 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 576 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 577 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 578 | } |
ec6b5d7b | 579 | |
5b6feee9 BF |
580 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
581 | { | |
582 | struct nfsd4_session *new; | |
583 | int mem, i; | |
a649637c | 584 | |
5b6feee9 BF |
585 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
586 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
587 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 588 | |
5b6feee9 BF |
589 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
590 | if (!new) | |
591 | return NULL; | |
557ce264 | 592 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
593 | for (i = 0; i < numslots; i++) { |
594 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
595 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
596 | if (!new->se_slots[i]) | |
557ce264 | 597 | goto out_free; |
557ce264 | 598 | } |
5b6feee9 BF |
599 | return new; |
600 | out_free: | |
601 | while (i--) | |
602 | kfree(new->se_slots[i]); | |
603 | kfree(new); | |
604 | return NULL; | |
ec6b5d7b AA |
605 | } |
606 | ||
5b6feee9 | 607 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 608 | { |
5b6feee9 | 609 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 610 | |
5b6feee9 | 611 | new->maxreqs = numslots; |
d2b21743 MJ |
612 | new->maxresp_cached = min_t(u32, req->maxresp_cached, |
613 | slotsize + NFSD_MIN_HDR_SEQ_SZ); | |
5b6feee9 BF |
614 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); |
615 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
616 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
617 | } | |
ec6b5d7b | 618 | |
19cf5c02 BF |
619 | static void free_conn(struct nfsd4_conn *c) |
620 | { | |
621 | svc_xprt_put(c->cn_xprt); | |
622 | kfree(c); | |
623 | } | |
ec6b5d7b | 624 | |
19cf5c02 BF |
625 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
626 | { | |
627 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
628 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 629 | |
19cf5c02 BF |
630 | spin_lock(&clp->cl_lock); |
631 | if (!list_empty(&c->cn_persession)) { | |
632 | list_del(&c->cn_persession); | |
633 | free_conn(c); | |
634 | } | |
635 | spin_unlock(&clp->cl_lock); | |
eea49806 | 636 | nfsd4_probe_callback(clp); |
19cf5c02 | 637 | } |
ec6b5d7b | 638 | |
d29c374c | 639 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 640 | { |
c7662518 | 641 | struct nfsd4_conn *conn; |
ec6b5d7b | 642 | |
c7662518 BF |
643 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
644 | if (!conn) | |
db90681d | 645 | return NULL; |
c7662518 BF |
646 | svc_xprt_get(rqstp->rq_xprt); |
647 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 648 | conn->cn_flags = flags; |
db90681d BF |
649 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
650 | return conn; | |
651 | } | |
a649637c | 652 | |
328ead28 BF |
653 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
654 | { | |
655 | conn->cn_session = ses; | |
656 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
657 | } |
658 | ||
db90681d | 659 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 660 | { |
db90681d | 661 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 662 | |
c7662518 | 663 | spin_lock(&clp->cl_lock); |
328ead28 | 664 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 665 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
666 | } |
667 | ||
21b75b01 | 668 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 669 | { |
19cf5c02 | 670 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 671 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
672 | } |
673 | ||
1d1bc8f2 | 674 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 675 | { |
db90681d | 676 | struct nfsd4_conn *conn; |
21b75b01 | 677 | int ret; |
ec6b5d7b | 678 | |
1d1bc8f2 | 679 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
680 | if (!conn) |
681 | return nfserr_jukebox; | |
682 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
683 | ret = nfsd4_register_conn(conn); |
684 | if (ret) | |
685 | /* oops; xprt is already down: */ | |
686 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
687 | return nfs_ok; |
688 | } | |
ec6b5d7b | 689 | |
1d1bc8f2 BF |
690 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
691 | { | |
692 | u32 dir = NFS4_CDFC4_FORE; | |
693 | ||
694 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
695 | dir |= NFS4_CDFC4_BACK; | |
696 | ||
697 | return nfsd4_new_conn(rqstp, ses, dir); | |
698 | } | |
699 | ||
700 | /* must be called under client_lock */ | |
19cf5c02 | 701 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 702 | { |
19cf5c02 BF |
703 | struct nfs4_client *clp = s->se_client; |
704 | struct nfsd4_conn *c; | |
ec6b5d7b | 705 | |
19cf5c02 BF |
706 | spin_lock(&clp->cl_lock); |
707 | while (!list_empty(&s->se_conns)) { | |
708 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
709 | list_del_init(&c->cn_persession); | |
710 | spin_unlock(&clp->cl_lock); | |
557ce264 | 711 | |
19cf5c02 BF |
712 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
713 | free_conn(c); | |
ec6b5d7b | 714 | |
19cf5c02 BF |
715 | spin_lock(&clp->cl_lock); |
716 | } | |
717 | spin_unlock(&clp->cl_lock); | |
c7662518 | 718 | } |
ec6b5d7b | 719 | |
c7662518 BF |
720 | void free_session(struct kref *kref) |
721 | { | |
722 | struct nfsd4_session *ses; | |
723 | int mem; | |
724 | ||
725 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 726 | nfsd4_del_conns(ses); |
c7662518 BF |
727 | spin_lock(&nfsd_drc_lock); |
728 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
729 | nfsd_drc_mem_used -= mem; | |
730 | spin_unlock(&nfsd_drc_lock); | |
731 | free_session_slots(ses); | |
732 | kfree(ses); | |
733 | } | |
734 | ||
ac7c46f2 | 735 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
736 | { |
737 | struct nfsd4_session *new; | |
738 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
739 | int numslots, slotsize; | |
c7662518 | 740 | int status; |
5b6feee9 BF |
741 | int idx; |
742 | ||
743 | /* | |
744 | * Note decreasing slot size below client's request may | |
745 | * make it difficult for client to function correctly, whereas | |
746 | * decreasing the number of slots will (just?) affect | |
747 | * performance. When short on memory we therefore prefer to | |
748 | * decrease number of slots instead of their size. | |
749 | */ | |
750 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
751 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
752 | if (numslots < 1) |
753 | return NULL; | |
5b6feee9 BF |
754 | |
755 | new = alloc_session(slotsize, numslots); | |
756 | if (!new) { | |
757 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 758 | return NULL; |
557ce264 | 759 | } |
5b6feee9 | 760 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 761 | |
ec6b5d7b AA |
762 | new->se_client = clp; |
763 | gen_sessionid(new); | |
ec6b5d7b | 764 | |
c7662518 BF |
765 | INIT_LIST_HEAD(&new->se_conns); |
766 | ||
ac7c46f2 | 767 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 768 | new->se_flags = cses->flags; |
8b5ce5cd | 769 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 770 | kref_init(&new->se_ref); |
5b6feee9 | 771 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 772 | spin_lock(&client_lock); |
ec6b5d7b | 773 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 774 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 775 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 776 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 777 | spin_unlock(&client_lock); |
ec6b5d7b | 778 | |
1d1bc8f2 | 779 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 780 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
781 | if (status) { |
782 | free_session(&new->se_ref); | |
ac7c46f2 | 783 | return NULL; |
c7662518 | 784 | } |
dcbeaa68 | 785 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 786 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
787 | /* |
788 | * This is a little silly; with sessions there's no real | |
789 | * use for the callback address. Use the peer address | |
790 | * as a reasonable default for now, but consider fixing | |
791 | * the rpc client not to require an address in the | |
792 | * future: | |
793 | */ | |
edd76786 BF |
794 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
795 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 796 | } |
dcbeaa68 | 797 | nfsd4_probe_callback(clp); |
ac7c46f2 | 798 | return new; |
ec6b5d7b AA |
799 | } |
800 | ||
9089f1b4 | 801 | /* caller must hold client_lock */ |
5282fd72 ME |
802 | static struct nfsd4_session * |
803 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
804 | { | |
805 | struct nfsd4_session *elem; | |
806 | int idx; | |
807 | ||
808 | dump_sessionid(__func__, sessionid); | |
809 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
810 | /* Search in the appropriate list */ |
811 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
812 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
813 | NFS4_MAX_SESSIONID_LEN)) { | |
814 | return elem; | |
815 | } | |
816 | } | |
817 | ||
818 | dprintk("%s: session not found\n", __func__); | |
819 | return NULL; | |
820 | } | |
821 | ||
9089f1b4 | 822 | /* caller must hold client_lock */ |
7116ed6b | 823 | static void |
5282fd72 | 824 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
825 | { |
826 | list_del(&ses->se_hash); | |
4c649378 | 827 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 828 | list_del(&ses->se_perclnt); |
4c649378 | 829 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
830 | } |
831 | ||
36acb66b | 832 | /* must be called under the client_lock */ |
1da177e4 | 833 | static inline void |
36acb66b | 834 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 835 | { |
07cd4909 BH |
836 | if (is_client_expired(clp)) { |
837 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
838 | __func__, | |
839 | clp->cl_clientid.cl_boot, | |
840 | clp->cl_clientid.cl_id); | |
841 | return; | |
842 | } | |
843 | ||
1da177e4 LT |
844 | /* |
845 | * Move client to the end to the LRU list. | |
846 | */ | |
847 | dprintk("renewing client (clientid %08x/%08x)\n", | |
848 | clp->cl_clientid.cl_boot, | |
849 | clp->cl_clientid.cl_id); | |
850 | list_move_tail(&clp->cl_lru, &client_lru); | |
851 | clp->cl_time = get_seconds(); | |
852 | } | |
853 | ||
36acb66b BH |
854 | static inline void |
855 | renew_client(struct nfs4_client *clp) | |
856 | { | |
857 | spin_lock(&client_lock); | |
858 | renew_client_locked(clp); | |
859 | spin_unlock(&client_lock); | |
860 | } | |
861 | ||
1da177e4 LT |
862 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
863 | static int | |
864 | STALE_CLIENTID(clientid_t *clid) | |
865 | { | |
866 | if (clid->cl_boot == boot_time) | |
867 | return 0; | |
60adfc50 AA |
868 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
869 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
870 | return 1; |
871 | } | |
872 | ||
873 | /* | |
874 | * XXX Should we use a slab cache ? | |
875 | * This type of memory management is somewhat inefficient, but we use it | |
876 | * anyway since SETCLIENTID is not a common operation. | |
877 | */ | |
35bba9a3 | 878 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
879 | { |
880 | struct nfs4_client *clp; | |
881 | ||
35bba9a3 BF |
882 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
883 | if (clp == NULL) | |
884 | return NULL; | |
885 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
886 | if (clp->cl_name.data == NULL) { | |
887 | kfree(clp); | |
888 | return NULL; | |
1da177e4 | 889 | } |
35bba9a3 BF |
890 | memcpy(clp->cl_name.data, name.data, name.len); |
891 | clp->cl_name.len = name.len; | |
1da177e4 LT |
892 | return clp; |
893 | } | |
894 | ||
895 | static inline void | |
896 | free_client(struct nfs4_client *clp) | |
897 | { | |
792c95dd BF |
898 | while (!list_empty(&clp->cl_sessions)) { |
899 | struct nfsd4_session *ses; | |
900 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
901 | se_perclnt); | |
902 | list_del(&ses->se_perclnt); | |
903 | nfsd4_put_session(ses); | |
904 | } | |
1da177e4 LT |
905 | if (clp->cl_cred.cr_group_info) |
906 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 907 | kfree(clp->cl_principal); |
1da177e4 LT |
908 | kfree(clp->cl_name.data); |
909 | kfree(clp); | |
910 | } | |
911 | ||
d7682988 BH |
912 | void |
913 | release_session_client(struct nfsd4_session *session) | |
914 | { | |
915 | struct nfs4_client *clp = session->se_client; | |
916 | ||
917 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
918 | return; | |
919 | if (is_client_expired(clp)) { | |
920 | free_client(clp); | |
921 | session->se_client = NULL; | |
922 | } else | |
923 | renew_client_locked(clp); | |
924 | spin_unlock(&client_lock); | |
d7682988 BH |
925 | } |
926 | ||
84d38ac9 BH |
927 | /* must be called under the client_lock */ |
928 | static inline void | |
929 | unhash_client_locked(struct nfs4_client *clp) | |
930 | { | |
792c95dd BF |
931 | struct nfsd4_session *ses; |
932 | ||
07cd4909 | 933 | mark_client_expired(clp); |
84d38ac9 | 934 | list_del(&clp->cl_lru); |
4c649378 | 935 | spin_lock(&clp->cl_lock); |
792c95dd BF |
936 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
937 | list_del_init(&ses->se_hash); | |
4c649378 | 938 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
939 | } |
940 | ||
1da177e4 LT |
941 | static void |
942 | expire_client(struct nfs4_client *clp) | |
943 | { | |
944 | struct nfs4_stateowner *sop; | |
945 | struct nfs4_delegation *dp; | |
1da177e4 LT |
946 | struct list_head reaplist; |
947 | ||
1da177e4 LT |
948 | INIT_LIST_HEAD(&reaplist); |
949 | spin_lock(&recall_lock); | |
ea1da636 N |
950 | while (!list_empty(&clp->cl_delegations)) { |
951 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 952 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
953 | list_move(&dp->dl_recall_lru, &reaplist); |
954 | } | |
955 | spin_unlock(&recall_lock); | |
956 | while (!list_empty(&reaplist)) { | |
957 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
958 | list_del_init(&dp->dl_recall_lru); | |
959 | unhash_delegation(dp); | |
960 | } | |
ea1da636 N |
961 | while (!list_empty(&clp->cl_openowners)) { |
962 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 963 | release_openowner(sop); |
1da177e4 | 964 | } |
6ff8da08 | 965 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
966 | if (clp->cl_cb_conn.cb_xprt) |
967 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
968 | list_del(&clp->cl_idhash); |
969 | list_del(&clp->cl_strhash); | |
be1fdf6c | 970 | spin_lock(&client_lock); |
84d38ac9 | 971 | unhash_client_locked(clp); |
46583e25 BH |
972 | if (atomic_read(&clp->cl_refcount) == 0) |
973 | free_client(clp); | |
be1fdf6c | 974 | spin_unlock(&client_lock); |
1da177e4 LT |
975 | } |
976 | ||
35bba9a3 BF |
977 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
978 | { | |
979 | memcpy(target->cl_verifier.data, source->data, | |
980 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
981 | } |
982 | ||
35bba9a3 BF |
983 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
984 | { | |
1da177e4 LT |
985 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
986 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
987 | } | |
988 | ||
35bba9a3 BF |
989 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
990 | { | |
1da177e4 LT |
991 | target->cr_uid = source->cr_uid; |
992 | target->cr_gid = source->cr_gid; | |
993 | target->cr_group_info = source->cr_group_info; | |
994 | get_group_info(target->cr_group_info); | |
995 | } | |
996 | ||
35bba9a3 | 997 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 998 | { |
a55370a3 | 999 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
1000 | } |
1001 | ||
1002 | static int | |
599e0a22 BF |
1003 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1004 | { | |
1005 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1006 | } |
1007 | ||
1008 | static int | |
599e0a22 BF |
1009 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1010 | { | |
1011 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1012 | } |
1013 | ||
1014 | /* XXX what about NGROUP */ | |
1015 | static int | |
599e0a22 BF |
1016 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1017 | { | |
1018 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1019 | } |
1020 | ||
5ec7b46c BF |
1021 | static void gen_clid(struct nfs4_client *clp) |
1022 | { | |
1023 | static u32 current_clientid = 1; | |
1024 | ||
1da177e4 LT |
1025 | clp->cl_clientid.cl_boot = boot_time; |
1026 | clp->cl_clientid.cl_id = current_clientid++; | |
1027 | } | |
1028 | ||
deda2faa BF |
1029 | static void gen_confirm(struct nfs4_client *clp) |
1030 | { | |
1031 | static u32 i; | |
1032 | u32 *p; | |
1da177e4 | 1033 | |
1da177e4 | 1034 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1035 | *p++ = get_seconds(); |
1036 | *p++ = i++; | |
1da177e4 LT |
1037 | } |
1038 | ||
b09333c4 RL |
1039 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1040 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1041 | { | |
1042 | struct nfs4_client *clp; | |
1043 | struct sockaddr *sa = svc_addr(rqstp); | |
1044 | char *princ; | |
1045 | ||
1046 | clp = alloc_client(name); | |
1047 | if (clp == NULL) | |
1048 | return NULL; | |
1049 | ||
792c95dd BF |
1050 | INIT_LIST_HEAD(&clp->cl_sessions); |
1051 | ||
b09333c4 RL |
1052 | princ = svc_gss_principal(rqstp); |
1053 | if (princ) { | |
1054 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1055 | if (clp->cl_principal == NULL) { | |
1056 | free_client(clp); | |
1057 | return NULL; | |
1058 | } | |
1059 | } | |
1060 | ||
1061 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 1062 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1063 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1064 | INIT_LIST_HEAD(&clp->cl_idhash); |
1065 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1066 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1067 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1068 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1069 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1070 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1071 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1072 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1073 | clear_bit(0, &clp->cl_cb_slot_busy); |
1074 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1075 | copy_verf(clp, verf); | |
1076 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1077 | clp->cl_flavor = rqstp->rq_flavor; | |
1078 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1079 | gen_confirm(clp); | |
edd76786 | 1080 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1081 | return clp; |
1082 | } | |
1083 | ||
35bba9a3 BF |
1084 | static int check_name(struct xdr_netobj name) |
1085 | { | |
1da177e4 LT |
1086 | if (name.len == 0) |
1087 | return 0; | |
1088 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 1089 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
1090 | return 0; |
1091 | } | |
1092 | return 1; | |
1093 | } | |
1094 | ||
fd39ca9a | 1095 | static void |
1da177e4 LT |
1096 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1097 | { | |
1098 | unsigned int idhashval; | |
1099 | ||
1100 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1101 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1102 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1103 | renew_client(clp); |
1da177e4 LT |
1104 | } |
1105 | ||
fd39ca9a | 1106 | static void |
1da177e4 LT |
1107 | move_to_confirmed(struct nfs4_client *clp) |
1108 | { | |
1109 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1110 | unsigned int strhashval; | |
1111 | ||
1112 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1113 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1114 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1115 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1116 | renew_client(clp); |
1117 | } | |
1118 | ||
1119 | static struct nfs4_client * | |
1120 | find_confirmed_client(clientid_t *clid) | |
1121 | { | |
1122 | struct nfs4_client *clp; | |
1123 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1124 | ||
1125 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1126 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1127 | return clp; |
1128 | } | |
1129 | return NULL; | |
1130 | } | |
1131 | ||
1132 | static struct nfs4_client * | |
1133 | find_unconfirmed_client(clientid_t *clid) | |
1134 | { | |
1135 | struct nfs4_client *clp; | |
1136 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1137 | ||
1138 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1139 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1140 | return clp; |
1141 | } | |
1142 | return NULL; | |
1143 | } | |
1144 | ||
6e5f15c9 | 1145 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1146 | { |
6e5f15c9 | 1147 | return clp->cl_exchange_flags != 0; |
e203d506 | 1148 | } |
a1bcecd2 | 1149 | |
28ce6054 | 1150 | static struct nfs4_client * |
e203d506 | 1151 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1152 | { |
1153 | struct nfs4_client *clp; | |
1154 | ||
1155 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1156 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1157 | return clp; |
1158 | } | |
1159 | return NULL; | |
1160 | } | |
1161 | ||
1162 | static struct nfs4_client * | |
e203d506 | 1163 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1164 | { |
1165 | struct nfs4_client *clp; | |
1166 | ||
1167 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1168 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1169 | return clp; |
1170 | } | |
1171 | return NULL; | |
1172 | } | |
1173 | ||
6f3d772f TU |
1174 | static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) |
1175 | { | |
1176 | switch (family) { | |
1177 | case AF_INET: | |
1178 | ((struct sockaddr_in *)sa)->sin_family = AF_INET; | |
1179 | ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; | |
1180 | return; | |
1181 | case AF_INET6: | |
1182 | ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; | |
1183 | ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; | |
1184 | return; | |
1185 | } | |
1186 | } | |
1187 | ||
fd39ca9a | 1188 | static void |
6f3d772f | 1189 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1190 | { |
07263f1e | 1191 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1192 | struct sockaddr *sa = svc_addr(rqstp); |
1193 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1194 | unsigned short expected_family; |
1195 | ||
1196 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1197 | if (se->se_callback_netid_len == 3 && | |
1198 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1199 | expected_family = AF_INET; | |
1200 | else if (se->se_callback_netid_len == 4 && | |
1201 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1202 | expected_family = AF_INET6; | |
1203 | else | |
1da177e4 LT |
1204 | goto out_err; |
1205 | ||
07263f1e | 1206 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1207 | se->se_callback_addr_len, |
07263f1e BF |
1208 | (struct sockaddr *)&conn->cb_addr, |
1209 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1210 | |
07263f1e | 1211 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1212 | goto out_err; |
aa9a4ec7 | 1213 | |
07263f1e BF |
1214 | if (conn->cb_addr.ss_family == AF_INET6) |
1215 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1216 | |
07263f1e BF |
1217 | conn->cb_prog = se->se_callback_prog; |
1218 | conn->cb_ident = se->se_callback_ident; | |
6f3d772f | 1219 | rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); |
1da177e4 LT |
1220 | return; |
1221 | out_err: | |
07263f1e BF |
1222 | conn->cb_addr.ss_family = AF_UNSPEC; |
1223 | conn->cb_addrlen = 0; | |
849823c5 | 1224 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1225 | "will not receive delegations\n", |
1226 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1227 | ||
1da177e4 LT |
1228 | return; |
1229 | } | |
1230 | ||
074fe897 | 1231 | /* |
557ce264 | 1232 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1233 | */ |
074fe897 AA |
1234 | void |
1235 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1236 | { |
557ce264 AA |
1237 | struct nfsd4_slot *slot = resp->cstate.slot; |
1238 | unsigned int base; | |
074fe897 | 1239 | |
557ce264 | 1240 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1241 | |
557ce264 AA |
1242 | slot->sl_opcnt = resp->opcnt; |
1243 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1244 | |
bf864a31 | 1245 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1246 | slot->sl_datalen = 0; |
bf864a31 | 1247 | return; |
074fe897 | 1248 | } |
557ce264 AA |
1249 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1250 | base = (char *)resp->cstate.datap - | |
1251 | (char *)resp->xbuf->head[0].iov_base; | |
1252 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1253 | slot->sl_datalen)) | |
1254 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1255 | return; | |
074fe897 AA |
1256 | } |
1257 | ||
1258 | /* | |
abfabf8c AA |
1259 | * Encode the replay sequence operation from the slot values. |
1260 | * If cachethis is FALSE encode the uncached rep error on the next | |
1261 | * operation which sets resp->p and increments resp->opcnt for | |
1262 | * nfs4svc_encode_compoundres. | |
074fe897 | 1263 | * |
074fe897 | 1264 | */ |
abfabf8c AA |
1265 | static __be32 |
1266 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1267 | struct nfsd4_compoundres *resp) | |
074fe897 | 1268 | { |
abfabf8c AA |
1269 | struct nfsd4_op *op; |
1270 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1271 | |
abfabf8c | 1272 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1273 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1274 | |
abfabf8c AA |
1275 | /* Encode the replayed sequence operation */ |
1276 | op = &args->ops[resp->opcnt - 1]; | |
1277 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1278 | |
abfabf8c | 1279 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1280 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1281 | op = &args->ops[resp->opcnt++]; |
1282 | op->status = nfserr_retry_uncached_rep; | |
1283 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1284 | } |
abfabf8c | 1285 | return op->status; |
074fe897 AA |
1286 | } |
1287 | ||
1288 | /* | |
557ce264 AA |
1289 | * The sequence operation is not cached because we can use the slot and |
1290 | * session values. | |
074fe897 AA |
1291 | */ |
1292 | __be32 | |
bf864a31 AA |
1293 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1294 | struct nfsd4_sequence *seq) | |
074fe897 | 1295 | { |
557ce264 | 1296 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1297 | __be32 status; |
1298 | ||
557ce264 | 1299 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1300 | |
abfabf8c AA |
1301 | /* Either returns 0 or nfserr_retry_uncached */ |
1302 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1303 | if (status == nfserr_retry_uncached_rep) | |
1304 | return status; | |
074fe897 | 1305 | |
557ce264 AA |
1306 | /* The sequence operation has been encoded, cstate->datap set. */ |
1307 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1308 | |
557ce264 AA |
1309 | resp->opcnt = slot->sl_opcnt; |
1310 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1311 | status = slot->sl_status; | |
074fe897 AA |
1312 | |
1313 | return status; | |
1314 | } | |
1315 | ||
0733d213 AA |
1316 | /* |
1317 | * Set the exchange_id flags returned by the server. | |
1318 | */ | |
1319 | static void | |
1320 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1321 | { | |
1322 | /* pNFS is not supported */ | |
1323 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1324 | ||
1325 | /* Referrals are supported, Migration is not. */ | |
1326 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1327 | ||
1328 | /* set the wire flags to return to client. */ | |
1329 | clid->flags = new->cl_exchange_flags; | |
1330 | } | |
1331 | ||
069b6ad4 AA |
1332 | __be32 |
1333 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1334 | struct nfsd4_compound_state *cstate, | |
1335 | struct nfsd4_exchange_id *exid) | |
1336 | { | |
0733d213 AA |
1337 | struct nfs4_client *unconf, *conf, *new; |
1338 | int status; | |
1339 | unsigned int strhashval; | |
1340 | char dname[HEXDIR_LEN]; | |
363168b4 | 1341 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1342 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1343 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1344 | |
363168b4 | 1345 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1346 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1347 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1348 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1349 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1350 | |
1351 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1352 | return nfserr_inval; | |
1353 | ||
1354 | /* Currently only support SP4_NONE */ | |
1355 | switch (exid->spa_how) { | |
1356 | case SP4_NONE: | |
1357 | break; | |
1358 | case SP4_SSV: | |
044bc1d4 | 1359 | return nfserr_serverfault; |
0733d213 AA |
1360 | default: |
1361 | BUG(); /* checked by xdr code */ | |
1362 | case SP4_MACH_CRED: | |
1363 | return nfserr_serverfault; /* no excuse :-/ */ | |
1364 | } | |
1365 | ||
1366 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1367 | ||
1368 | if (status) | |
1369 | goto error; | |
1370 | ||
1371 | strhashval = clientstr_hashval(dname); | |
1372 | ||
1373 | nfs4_lock_state(); | |
1374 | status = nfs_ok; | |
1375 | ||
e203d506 | 1376 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1377 | if (conf) { |
e203d506 BF |
1378 | if (!clp_used_exchangeid(conf)) { |
1379 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1380 | goto out; | |
1381 | } | |
0733d213 AA |
1382 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1383 | /* 18.35.4 case 8 */ | |
1384 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1385 | status = nfserr_not_same; | |
1386 | goto out; | |
1387 | } | |
1388 | /* Client reboot: destroy old state */ | |
1389 | expire_client(conf); | |
1390 | goto out_new; | |
1391 | } | |
1392 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1393 | /* 18.35.4 case 9 */ | |
1394 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1395 | status = nfserr_perm; | |
1396 | goto out; | |
1397 | } | |
1398 | expire_client(conf); | |
1399 | goto out_new; | |
1400 | } | |
0733d213 AA |
1401 | /* |
1402 | * Set bit when the owner id and verifier map to an already | |
1403 | * confirmed client id (18.35.3). | |
1404 | */ | |
1405 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1406 | ||
1407 | /* | |
1408 | * Falling into 18.35.4 case 2, possible router replay. | |
1409 | * Leave confirmed record intact and return same result. | |
1410 | */ | |
1411 | copy_verf(conf, &verf); | |
1412 | new = conf; | |
1413 | goto out_copy; | |
6ddbbbfe MS |
1414 | } |
1415 | ||
1416 | /* 18.35.4 case 7 */ | |
1417 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1418 | status = nfserr_noent; | |
1419 | goto out; | |
0733d213 AA |
1420 | } |
1421 | ||
e203d506 | 1422 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1423 | if (unconf) { |
1424 | /* | |
1425 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1426 | * a new unconfirmed record should be generated regardless | |
1427 | * of whether any properties have changed. | |
1428 | */ | |
1429 | expire_client(unconf); | |
1430 | } | |
1431 | ||
1432 | out_new: | |
1433 | /* Normal case */ | |
b09333c4 | 1434 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1435 | if (new == NULL) { |
4731030d | 1436 | status = nfserr_jukebox; |
0733d213 AA |
1437 | goto out; |
1438 | } | |
1439 | ||
0733d213 | 1440 | gen_clid(new); |
0733d213 AA |
1441 | add_to_unconfirmed(new, strhashval); |
1442 | out_copy: | |
1443 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1444 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1445 | ||
38eb76a5 | 1446 | exid->seqid = 1; |
0733d213 AA |
1447 | nfsd4_set_ex_flags(new, exid); |
1448 | ||
1449 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1450 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1451 | status = nfs_ok; |
1452 | ||
1453 | out: | |
1454 | nfs4_unlock_state(); | |
1455 | error: | |
1456 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1457 | return status; | |
069b6ad4 AA |
1458 | } |
1459 | ||
b85d4c01 | 1460 | static int |
88e588d5 | 1461 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1462 | { |
88e588d5 AA |
1463 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1464 | slot_seqid); | |
b85d4c01 BH |
1465 | |
1466 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1467 | if (slot_inuse) { |
1468 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1469 | return nfserr_jukebox; |
1470 | else | |
1471 | return nfserr_seq_misordered; | |
1472 | } | |
1473 | /* Normal */ | |
88e588d5 | 1474 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1475 | return nfs_ok; |
1476 | /* Replay */ | |
88e588d5 | 1477 | if (seqid == slot_seqid) |
b85d4c01 BH |
1478 | return nfserr_replay_cache; |
1479 | /* Wraparound */ | |
88e588d5 | 1480 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1481 | return nfs_ok; |
1482 | /* Misordered replay or misordered new request */ | |
1483 | return nfserr_seq_misordered; | |
1484 | } | |
1485 | ||
49557cc7 AA |
1486 | /* |
1487 | * Cache the create session result into the create session single DRC | |
1488 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1489 | * Do this for solo or embedded create session operations. | |
1490 | */ | |
1491 | static void | |
1492 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1493 | struct nfsd4_clid_slot *slot, int nfserr) | |
1494 | { | |
1495 | slot->sl_status = nfserr; | |
1496 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1497 | } | |
1498 | ||
1499 | static __be32 | |
1500 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1501 | struct nfsd4_clid_slot *slot) | |
1502 | { | |
1503 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1504 | return slot->sl_status; | |
1505 | } | |
1506 | ||
1b74c25b MJ |
1507 | #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ |
1508 | 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ | |
1509 | 1 + /* MIN tag is length with zero, only length */ \ | |
1510 | 3 + /* version, opcount, opcode */ \ | |
1511 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1512 | /* seqid, slotID, slotID, cache */ \ | |
1513 | 4 ) * sizeof(__be32)) | |
1514 | ||
1515 | #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ | |
1516 | 2 + /* verifier: AUTH_NULL, length 0 */\ | |
1517 | 1 + /* status */ \ | |
1518 | 1 + /* MIN tag is length with zero, only length */ \ | |
1519 | 3 + /* opcount, opcode, opstatus*/ \ | |
1520 | XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ | |
1521 | /* seqid, slotID, slotID, slotID, status */ \ | |
1522 | 5 ) * sizeof(__be32)) | |
1523 | ||
1524 | static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) | |
1525 | { | |
1526 | return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ | |
1527 | || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; | |
1528 | } | |
1529 | ||
069b6ad4 AA |
1530 | __be32 |
1531 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1532 | struct nfsd4_compound_state *cstate, | |
1533 | struct nfsd4_create_session *cr_ses) | |
1534 | { | |
363168b4 | 1535 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1536 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1537 | struct nfsd4_session *new; |
49557cc7 | 1538 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1539 | bool confirm_me = false; |
ec6b5d7b AA |
1540 | int status = 0; |
1541 | ||
a62573dc MJ |
1542 | if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) |
1543 | return nfserr_inval; | |
1544 | ||
ec6b5d7b AA |
1545 | nfs4_lock_state(); |
1546 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1547 | conf = find_confirmed_client(&cr_ses->clientid); | |
1548 | ||
1549 | if (conf) { | |
49557cc7 AA |
1550 | cs_slot = &conf->cl_cs_slot; |
1551 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1552 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1553 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1554 | cs_slot->sl_seqid); |
38eb76a5 | 1555 | /* Return the cached reply status */ |
49557cc7 | 1556 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1557 | goto out; |
49557cc7 | 1558 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1559 | status = nfserr_seq_misordered; |
1560 | dprintk("Sequence misordered!\n"); | |
1561 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1562 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1563 | goto out; |
1564 | } | |
ec6b5d7b AA |
1565 | } else if (unconf) { |
1566 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1567 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1568 | status = nfserr_clid_inuse; |
1569 | goto out; | |
1570 | } | |
1571 | ||
49557cc7 AA |
1572 | cs_slot = &unconf->cl_cs_slot; |
1573 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1574 | if (status) { |
1575 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1576 | status = nfserr_seq_misordered; |
cd5b8144 | 1577 | goto out; |
ec6b5d7b AA |
1578 | } |
1579 | ||
86c3e16c | 1580 | confirm_me = true; |
ec6b5d7b AA |
1581 | conf = unconf; |
1582 | } else { | |
1583 | status = nfserr_stale_clientid; | |
1584 | goto out; | |
1585 | } | |
1586 | ||
8323c3b2 BF |
1587 | /* |
1588 | * XXX: we should probably set this at creation time, and check | |
1589 | * for consistent minorversion use throughout: | |
1590 | */ | |
1591 | conf->cl_minorversion = 1; | |
408b79bc BF |
1592 | /* |
1593 | * We do not support RDMA or persistent sessions | |
1594 | */ | |
1595 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1596 | cr_ses->flags &= ~SESSION4_RDMA; | |
1597 | ||
1b74c25b MJ |
1598 | status = nfserr_toosmall; |
1599 | if (check_forechannel_attrs(cr_ses->fore_channel)) | |
1600 | goto out; | |
1601 | ||
ac7c46f2 BF |
1602 | status = nfserr_jukebox; |
1603 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1604 | if (!new) | |
ec6b5d7b | 1605 | goto out; |
ac7c46f2 BF |
1606 | status = nfs_ok; |
1607 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1608 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1609 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1610 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1611 | cs_slot->sl_seqid++; |
49557cc7 | 1612 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1613 | |
49557cc7 AA |
1614 | /* cache solo and embedded create sessions under the state lock */ |
1615 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1616 | if (confirm_me) |
1617 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1618 | out: |
1619 | nfs4_unlock_state(); | |
1620 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1621 | return status; | |
069b6ad4 AA |
1622 | } |
1623 | ||
57716355 BF |
1624 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1625 | { | |
1626 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1627 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1628 | ||
1629 | return argp->opcnt == resp->opcnt; | |
1630 | } | |
1631 | ||
1d1bc8f2 BF |
1632 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1633 | { | |
1634 | switch (*dir) { | |
1635 | case NFS4_CDFC4_FORE: | |
1636 | case NFS4_CDFC4_BACK: | |
1637 | return nfs_ok; | |
1638 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1639 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1640 | *dir = NFS4_CDFC4_BOTH; | |
1641 | return nfs_ok; | |
1642 | }; | |
1643 | return nfserr_inval; | |
1644 | } | |
1645 | ||
1646 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1647 | struct nfsd4_compound_state *cstate, | |
1648 | struct nfsd4_bind_conn_to_session *bcts) | |
1649 | { | |
1650 | __be32 status; | |
1651 | ||
1652 | if (!nfsd4_last_compound_op(rqstp)) | |
1653 | return nfserr_not_only_op; | |
1654 | spin_lock(&client_lock); | |
1655 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1656 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1657 | * client_lock iself: */ | |
1658 | if (cstate->session) { | |
1659 | nfsd4_get_session(cstate->session); | |
1660 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1661 | } | |
1662 | spin_unlock(&client_lock); | |
1663 | if (!cstate->session) | |
1664 | return nfserr_badsession; | |
1665 | ||
1666 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1db2b9dd BS |
1667 | if (!status) |
1668 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1669 | return status; | |
1d1bc8f2 BF |
1670 | } |
1671 | ||
5d4cec2f BF |
1672 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1673 | { | |
1674 | if (!session) | |
1675 | return 0; | |
1676 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1677 | } | |
1678 | ||
069b6ad4 AA |
1679 | __be32 |
1680 | nfsd4_destroy_session(struct svc_rqst *r, | |
1681 | struct nfsd4_compound_state *cstate, | |
1682 | struct nfsd4_destroy_session *sessionid) | |
1683 | { | |
e10e0cfc BH |
1684 | struct nfsd4_session *ses; |
1685 | u32 status = nfserr_badsession; | |
1686 | ||
1687 | /* Notes: | |
1688 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1689 | * - Should we return nfserr_back_chan_busy if waiting for | |
1690 | * callbacks on to-be-destroyed session? | |
1691 | * - Do we need to clear any callback info from previous session? | |
1692 | */ | |
1693 | ||
5d4cec2f | 1694 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1695 | if (!nfsd4_last_compound_op(r)) |
1696 | return nfserr_not_only_op; | |
1697 | } | |
e10e0cfc | 1698 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1699 | spin_lock(&client_lock); |
e10e0cfc BH |
1700 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1701 | if (!ses) { | |
9089f1b4 | 1702 | spin_unlock(&client_lock); |
e10e0cfc BH |
1703 | goto out; |
1704 | } | |
1705 | ||
1706 | unhash_session(ses); | |
9089f1b4 | 1707 | spin_unlock(&client_lock); |
e10e0cfc | 1708 | |
ab707e15 | 1709 | nfs4_lock_state(); |
84f5f7cc | 1710 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1711 | nfs4_unlock_state(); |
19cf5c02 BF |
1712 | |
1713 | nfsd4_del_conns(ses); | |
1714 | ||
e10e0cfc BH |
1715 | nfsd4_put_session(ses); |
1716 | status = nfs_ok; | |
1717 | out: | |
1718 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1719 | return status; | |
069b6ad4 AA |
1720 | } |
1721 | ||
a663bdd8 | 1722 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1723 | { |
1724 | struct nfsd4_conn *c; | |
1725 | ||
1726 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1727 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1728 | return c; |
1729 | } | |
1730 | } | |
1731 | return NULL; | |
1732 | } | |
1733 | ||
a663bdd8 | 1734 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1735 | { |
1736 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1737 | struct nfsd4_conn *c; |
21b75b01 | 1738 | int ret; |
328ead28 BF |
1739 | |
1740 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1741 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1742 | if (c) { |
1743 | spin_unlock(&clp->cl_lock); | |
1744 | free_conn(new); | |
1745 | return; | |
1746 | } | |
1747 | __nfsd4_hash_conn(new, ses); | |
1748 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1749 | ret = nfsd4_register_conn(new); |
1750 | if (ret) | |
1751 | /* oops; xprt is already down: */ | |
1752 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1753 | return; |
1754 | } | |
1755 | ||
868b89c3 MJ |
1756 | static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) |
1757 | { | |
1758 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1759 | ||
1760 | return args->opcnt > session->se_fchannel.maxops; | |
1761 | } | |
1762 | ||
ae82a8d0 MJ |
1763 | static bool nfsd4_request_too_big(struct svc_rqst *rqstp, |
1764 | struct nfsd4_session *session) | |
1765 | { | |
1766 | struct xdr_buf *xb = &rqstp->rq_arg; | |
1767 | ||
1768 | return xb->len > session->se_fchannel.maxreq_sz; | |
1769 | } | |
1770 | ||
069b6ad4 | 1771 | __be32 |
b85d4c01 | 1772 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1773 | struct nfsd4_compound_state *cstate, |
1774 | struct nfsd4_sequence *seq) | |
1775 | { | |
f9bb94c4 | 1776 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1777 | struct nfsd4_session *session; |
1778 | struct nfsd4_slot *slot; | |
a663bdd8 | 1779 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1780 | int status; |
1781 | ||
f9bb94c4 AA |
1782 | if (resp->opcnt != 1) |
1783 | return nfserr_sequence_pos; | |
1784 | ||
a663bdd8 BF |
1785 | /* |
1786 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1787 | * below. | |
1788 | */ | |
1789 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1790 | if (!conn) | |
1791 | return nfserr_jukebox; | |
1792 | ||
9089f1b4 | 1793 | spin_lock(&client_lock); |
b85d4c01 BH |
1794 | status = nfserr_badsession; |
1795 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1796 | if (!session) | |
1797 | goto out; | |
1798 | ||
868b89c3 MJ |
1799 | status = nfserr_too_many_ops; |
1800 | if (nfsd4_session_too_many_ops(rqstp, session)) | |
1801 | goto out; | |
1802 | ||
ae82a8d0 MJ |
1803 | status = nfserr_req_too_big; |
1804 | if (nfsd4_request_too_big(rqstp, session)) | |
1805 | goto out; | |
1806 | ||
b85d4c01 | 1807 | status = nfserr_badslot; |
6c18ba9f | 1808 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1809 | goto out; |
1810 | ||
557ce264 | 1811 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1812 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1813 | ||
a8dfdaeb AA |
1814 | /* We do not negotiate the number of slots yet, so set the |
1815 | * maxslots to the session maxreqs which is used to encode | |
1816 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1817 | seq->maxslots = session->se_fchannel.maxreqs; | |
1818 | ||
88e588d5 | 1819 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1820 | if (status == nfserr_replay_cache) { |
1821 | cstate->slot = slot; | |
1822 | cstate->session = session; | |
da3846a2 | 1823 | /* Return the cached reply status and set cstate->status |
557ce264 | 1824 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1825 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1826 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1827 | goto out; |
b85d4c01 BH |
1828 | } |
1829 | if (status) | |
1830 | goto out; | |
1831 | ||
a663bdd8 BF |
1832 | nfsd4_sequence_check_conn(conn, session); |
1833 | conn = NULL; | |
328ead28 | 1834 | |
b85d4c01 BH |
1835 | /* Success! bump slot seqid */ |
1836 | slot->sl_inuse = true; | |
1837 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1838 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1839 | |
1840 | cstate->slot = slot; | |
1841 | cstate->session = session; | |
1842 | ||
b85d4c01 | 1843 | out: |
26c0c75e | 1844 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1845 | if (cstate->session) { |
0d7bb719 BF |
1846 | struct nfs4_client *clp = session->se_client; |
1847 | ||
36acb66b | 1848 | nfsd4_get_session(cstate->session); |
0d7bb719 BF |
1849 | atomic_inc(&clp->cl_refcount); |
1850 | if (clp->cl_cb_state == NFSD4_CB_DOWN) | |
1851 | seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; | |
aaf84eb9 | 1852 | } |
a663bdd8 | 1853 | kfree(conn); |
36acb66b | 1854 | spin_unlock(&client_lock); |
b85d4c01 BH |
1855 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1856 | return status; | |
069b6ad4 AA |
1857 | } |
1858 | ||
4dc6ec00 BF |
1859 | __be32 |
1860 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1861 | { | |
bcecf1cc MJ |
1862 | int status = 0; |
1863 | ||
4dc6ec00 BF |
1864 | if (rc->rca_one_fs) { |
1865 | if (!cstate->current_fh.fh_dentry) | |
1866 | return nfserr_nofilehandle; | |
1867 | /* | |
1868 | * We don't take advantage of the rca_one_fs case. | |
1869 | * That's OK, it's optional, we can safely ignore it. | |
1870 | */ | |
1871 | return nfs_ok; | |
1872 | } | |
bcecf1cc | 1873 | |
4dc6ec00 | 1874 | nfs4_lock_state(); |
bcecf1cc MJ |
1875 | status = nfserr_complete_already; |
1876 | if (cstate->session->se_client->cl_firststate) | |
1877 | goto out; | |
1878 | ||
1879 | status = nfserr_stale_clientid; | |
1880 | if (is_client_expired(cstate->session->se_client)) | |
4dc6ec00 BF |
1881 | /* |
1882 | * The following error isn't really legal. | |
1883 | * But we only get here if the client just explicitly | |
1884 | * destroyed the client. Surely it no longer cares what | |
1885 | * error it gets back on an operation for the dead | |
1886 | * client. | |
1887 | */ | |
bcecf1cc MJ |
1888 | goto out; |
1889 | ||
1890 | status = nfs_ok; | |
4dc6ec00 | 1891 | nfsd4_create_clid_dir(cstate->session->se_client); |
bcecf1cc | 1892 | out: |
4dc6ec00 | 1893 | nfs4_unlock_state(); |
bcecf1cc | 1894 | return status; |
4dc6ec00 BF |
1895 | } |
1896 | ||
b37ad28b | 1897 | __be32 |
b591480b BF |
1898 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1899 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1900 | { |
1da177e4 LT |
1901 | struct xdr_netobj clname = { |
1902 | .len = setclid->se_namelen, | |
1903 | .data = setclid->se_name, | |
1904 | }; | |
1905 | nfs4_verifier clverifier = setclid->se_verf; | |
1906 | unsigned int strhashval; | |
28ce6054 | 1907 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1908 | __be32 status; |
a55370a3 | 1909 | char dname[HEXDIR_LEN]; |
1da177e4 | 1910 | |
1da177e4 | 1911 | if (!check_name(clname)) |
73aea4ec | 1912 | return nfserr_inval; |
1da177e4 | 1913 | |
a55370a3 N |
1914 | status = nfs4_make_rec_clidname(dname, &clname); |
1915 | if (status) | |
73aea4ec | 1916 | return status; |
a55370a3 | 1917 | |
1da177e4 LT |
1918 | /* |
1919 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1920 | * We get here on a DRC miss. | |
1921 | */ | |
1922 | ||
a55370a3 | 1923 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1924 | |
1da177e4 | 1925 | nfs4_lock_state(); |
e203d506 | 1926 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 1927 | if (conf) { |
a186e767 | 1928 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1929 | status = nfserr_clid_inuse; |
e203d506 BF |
1930 | if (clp_used_exchangeid(conf)) |
1931 | goto out; | |
026722c2 | 1932 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1933 | char addr_str[INET6_ADDRSTRLEN]; |
1934 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1935 | sizeof(addr_str)); | |
1936 | dprintk("NFSD: setclientid: string in use by client " | |
1937 | "at %s\n", addr_str); | |
1da177e4 LT |
1938 | goto out; |
1939 | } | |
1da177e4 | 1940 | } |
a186e767 BF |
1941 | /* |
1942 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1943 | * has a description of SETCLIENTID request processing consisting | |
1944 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1945 | */ | |
e203d506 | 1946 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
1da177e4 LT |
1947 | status = nfserr_resource; |
1948 | if (!conf) { | |
a186e767 BF |
1949 | /* |
1950 | * RFC 3530 14.2.33 CASE 4: | |
1951 | * placed first, because it is the normal case | |
1da177e4 LT |
1952 | */ |
1953 | if (unconf) | |
1954 | expire_client(unconf); | |
b09333c4 | 1955 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1956 | if (new == NULL) |
1da177e4 | 1957 | goto out; |
1da177e4 | 1958 | gen_clid(new); |
599e0a22 | 1959 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1960 | /* |
a186e767 BF |
1961 | * RFC 3530 14.2.33 CASE 1: |
1962 | * probable callback update | |
1da177e4 | 1963 | */ |
31f4a6c1 N |
1964 | if (unconf) { |
1965 | /* Note this is removing unconfirmed {*x***}, | |
1966 | * which is stronger than RFC recommended {vxc**}. | |
1967 | * This has the advantage that there is at most | |
1968 | * one {*x***} in either list at any time. | |
1969 | */ | |
1970 | expire_client(unconf); | |
1da177e4 | 1971 | } |
b09333c4 | 1972 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1973 | if (new == NULL) |
1da177e4 | 1974 | goto out; |
1da177e4 | 1975 | copy_clid(new, conf); |
1da177e4 LT |
1976 | } else if (!unconf) { |
1977 | /* | |
a186e767 BF |
1978 | * RFC 3530 14.2.33 CASE 2: |
1979 | * probable client reboot; state will be removed if | |
1980 | * confirmed. | |
1da177e4 | 1981 | */ |
b09333c4 | 1982 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1983 | if (new == NULL) |
1da177e4 | 1984 | goto out; |
1da177e4 | 1985 | gen_clid(new); |
49ba8781 | 1986 | } else { |
a186e767 BF |
1987 | /* |
1988 | * RFC 3530 14.2.33 CASE 3: | |
1989 | * probable client reboot; state will be removed if | |
1990 | * confirmed. | |
1da177e4 LT |
1991 | */ |
1992 | expire_client(unconf); | |
b09333c4 | 1993 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1994 | if (new == NULL) |
1da177e4 | 1995 | goto out; |
1da177e4 | 1996 | gen_clid(new); |
1da177e4 | 1997 | } |
8323c3b2 BF |
1998 | /* |
1999 | * XXX: we should probably set this at creation time, and check | |
2000 | * for consistent minorversion use throughout: | |
2001 | */ | |
2002 | new->cl_minorversion = 0; | |
6f3d772f | 2003 | gen_callback(new, setclid, rqstp); |
c175b83c | 2004 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
2005 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
2006 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
2007 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
2008 | status = nfs_ok; | |
2009 | out: | |
2010 | nfs4_unlock_state(); | |
2011 | return status; | |
2012 | } | |
2013 | ||
2014 | ||
2015 | /* | |
a186e767 BF |
2016 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
2017 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
2018 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 2019 | */ |
b37ad28b | 2020 | __be32 |
b591480b BF |
2021 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
2022 | struct nfsd4_compound_state *cstate, | |
2023 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 2024 | { |
363168b4 | 2025 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 2026 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
2027 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
2028 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 2029 | __be32 status; |
1da177e4 LT |
2030 | |
2031 | if (STALE_CLIENTID(clid)) | |
2032 | return nfserr_stale_clientid; | |
2033 | /* | |
2034 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
2035 | * We get here on a DRC miss. | |
2036 | */ | |
2037 | ||
2038 | nfs4_lock_state(); | |
21ab45a4 N |
2039 | |
2040 | conf = find_confirmed_client(clid); | |
2041 | unconf = find_unconfirmed_client(clid); | |
2042 | ||
2043 | status = nfserr_clid_inuse; | |
363168b4 | 2044 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 2045 | goto out; |
363168b4 | 2046 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
2047 | goto out; |
2048 | ||
a186e767 BF |
2049 | /* |
2050 | * section 14.2.34 of RFC 3530 has a description of | |
2051 | * SETCLIENTID_CONFIRM request processing consisting | |
2052 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
2053 | */ | |
366e0c1d | 2054 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
2055 | /* |
2056 | * RFC 3530 14.2.34 CASE 1: | |
2057 | * callback update | |
2058 | */ | |
599e0a22 | 2059 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
2060 | status = nfserr_clid_inuse; |
2061 | else { | |
5a3c9d71 BF |
2062 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
2063 | nfsd4_probe_callback(conf); | |
1a69c179 | 2064 | expire_client(unconf); |
1da177e4 | 2065 | status = nfs_ok; |
1a69c179 | 2066 | |
1da177e4 | 2067 | } |
f3aba4e5 | 2068 | } else if (conf && !unconf) { |
a186e767 BF |
2069 | /* |
2070 | * RFC 3530 14.2.34 CASE 2: | |
2071 | * probable retransmitted request; play it safe and | |
2072 | * do nothing. | |
7c79f737 | 2073 | */ |
599e0a22 | 2074 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2075 | status = nfserr_clid_inuse; |
21ab45a4 | 2076 | else |
1da177e4 | 2077 | status = nfs_ok; |
7c79f737 | 2078 | } else if (!conf && unconf |
599e0a22 | 2079 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2080 | /* |
2081 | * RFC 3530 14.2.34 CASE 3: | |
2082 | * Normal case; new or rebooted client: | |
7c79f737 | 2083 | */ |
599e0a22 | 2084 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2085 | status = nfserr_clid_inuse; |
2086 | } else { | |
1a69c179 N |
2087 | unsigned int hash = |
2088 | clientstr_hashval(unconf->cl_recdir); | |
2089 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2090 | hash); |
1a69c179 | 2091 | if (conf) { |
c7b9a459 | 2092 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2093 | expire_client(conf); |
2094 | } | |
1da177e4 | 2095 | move_to_confirmed(unconf); |
21ab45a4 | 2096 | conf = unconf; |
5a3c9d71 | 2097 | nfsd4_probe_callback(conf); |
1a69c179 | 2098 | status = nfs_ok; |
1da177e4 | 2099 | } |
599e0a22 BF |
2100 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2101 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2102 | &confirm)))) { |
a186e767 BF |
2103 | /* |
2104 | * RFC 3530 14.2.34 CASE 4: | |
2105 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2106 | */ |
1da177e4 | 2107 | status = nfserr_stale_clientid; |
7c79f737 | 2108 | } else { |
08e8987c N |
2109 | /* check that we have hit one of the cases...*/ |
2110 | status = nfserr_clid_inuse; | |
2111 | } | |
1da177e4 | 2112 | out: |
1da177e4 LT |
2113 | nfs4_unlock_state(); |
2114 | return status; | |
2115 | } | |
2116 | ||
1da177e4 LT |
2117 | /* OPEN Share state helper functions */ |
2118 | static inline struct nfs4_file * | |
2119 | alloc_init_file(struct inode *ino) | |
2120 | { | |
2121 | struct nfs4_file *fp; | |
2122 | unsigned int hashval = file_hashval(ino); | |
2123 | ||
e60d4398 N |
2124 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
2125 | if (fp) { | |
8b671b80 | 2126 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 2127 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
2128 | INIT_LIST_HEAD(&fp->fi_stateids); |
2129 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
2130 | fp->fi_inode = igrab(ino); |
2131 | fp->fi_id = current_fileid++; | |
47f9940c | 2132 | fp->fi_had_conflict = false; |
acfdf5c3 | 2133 | fp->fi_lease = NULL; |
f9d7562f BF |
2134 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2135 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
2136 | spin_lock(&recall_lock); |
2137 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2138 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2139 | return fp; |
2140 | } | |
2141 | return NULL; | |
2142 | } | |
2143 | ||
e60d4398 | 2144 | static void |
e18b890b | 2145 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2146 | { |
e60d4398 N |
2147 | if (*slab == NULL) |
2148 | return; | |
1a1d92c1 | 2149 | kmem_cache_destroy(*slab); |
e60d4398 | 2150 | *slab = NULL; |
1da177e4 LT |
2151 | } |
2152 | ||
e8ff2a84 | 2153 | void |
1da177e4 LT |
2154 | nfsd4_free_slabs(void) |
2155 | { | |
e60d4398 N |
2156 | nfsd4_free_slab(&stateowner_slab); |
2157 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 2158 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2159 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2160 | } |
1da177e4 | 2161 | |
e60d4398 N |
2162 | static int |
2163 | nfsd4_init_slabs(void) | |
2164 | { | |
2165 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 2166 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
2167 | if (stateowner_slab == NULL) |
2168 | goto out_nomem; | |
2169 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2170 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2171 | if (file_slab == NULL) |
2172 | goto out_nomem; | |
5ac049ac | 2173 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 2174 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
2175 | if (stateid_slab == NULL) |
2176 | goto out_nomem; | |
5b2d21c1 | 2177 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2178 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2179 | if (deleg_slab == NULL) |
2180 | goto out_nomem; | |
e60d4398 N |
2181 | return 0; |
2182 | out_nomem: | |
2183 | nfsd4_free_slabs(); | |
2184 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2185 | return -ENOMEM; | |
1da177e4 LT |
2186 | } |
2187 | ||
2188 | void | |
2189 | nfs4_free_stateowner(struct kref *kref) | |
2190 | { | |
2191 | struct nfs4_stateowner *sop = | |
2192 | container_of(kref, struct nfs4_stateowner, so_ref); | |
2193 | kfree(sop->so_owner.data); | |
2194 | kmem_cache_free(stateowner_slab, sop); | |
2195 | } | |
2196 | ||
2197 | static inline struct nfs4_stateowner * | |
2198 | alloc_stateowner(struct xdr_netobj *owner) | |
2199 | { | |
2200 | struct nfs4_stateowner *sop; | |
2201 | ||
2202 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
2203 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
2204 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
2205 | sop->so_owner.len = owner->len; | |
2206 | kref_init(&sop->so_ref); | |
2207 | return sop; | |
2208 | } | |
2209 | kmem_cache_free(stateowner_slab, sop); | |
2210 | } | |
2211 | return NULL; | |
2212 | } | |
2213 | ||
2214 | static struct nfs4_stateowner * | |
2215 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
2216 | struct nfs4_stateowner *sop; | |
2217 | struct nfs4_replay *rp; | |
2218 | unsigned int idhashval; | |
2219 | ||
2220 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
2221 | return NULL; | |
2222 | idhashval = ownerid_hashval(current_ownerid); | |
2223 | INIT_LIST_HEAD(&sop->so_idhash); | |
2224 | INIT_LIST_HEAD(&sop->so_strhash); | |
2225 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2226 | INIT_LIST_HEAD(&sop->so_stateids); |
2227 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
2228 | INIT_LIST_HEAD(&sop->so_close_lru); |
2229 | sop->so_time = 0; | |
2230 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
2231 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2232 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
2233 | sop->so_is_open_owner = 1; |
2234 | sop->so_id = current_ownerid++; | |
2235 | sop->so_client = clp; | |
2236 | sop->so_seqid = open->op_seqid; | |
2237 | sop->so_confirmed = 0; | |
2238 | rp = &sop->so_replay; | |
de1ae286 | 2239 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2240 | rp->rp_buflen = 0; |
2241 | rp->rp_buf = rp->rp_ibuf; | |
2242 | return sop; | |
2243 | } | |
2244 | ||
1da177e4 LT |
2245 | static inline void |
2246 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
2247 | struct nfs4_stateowner *sop = open->op_stateowner; | |
2248 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2249 | ||
2250 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
2251 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2252 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
2253 | INIT_LIST_HEAD(&stp->st_perfile); |
2254 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 2255 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 2256 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 2257 | stp->st_stateowner = sop; |
13cd2184 | 2258 | get_nfs4_file(fp); |
1da177e4 | 2259 | stp->st_file = fp; |
e4e83ea4 | 2260 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
2261 | stp->st_stateid.si_stateownerid = sop->so_id; |
2262 | stp->st_stateid.si_fileid = fp->fi_id; | |
2263 | stp->st_stateid.si_generation = 0; | |
2264 | stp->st_access_bmap = 0; | |
2265 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2266 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2267 | &stp->st_access_bmap); | |
1da177e4 | 2268 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2269 | stp->st_openstp = NULL; |
1da177e4 LT |
2270 | } |
2271 | ||
fd39ca9a | 2272 | static void |
1da177e4 LT |
2273 | move_to_close_lru(struct nfs4_stateowner *sop) |
2274 | { | |
2275 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
2276 | ||
358dd55a | 2277 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
2278 | sop->so_time = get_seconds(); |
2279 | } | |
2280 | ||
1da177e4 | 2281 | static int |
599e0a22 BF |
2282 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2283 | clientid_t *clid) | |
2284 | { | |
2285 | return (sop->so_owner.len == owner->len) && | |
2286 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2287 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2288 | } |
2289 | ||
2290 | static struct nfs4_stateowner * | |
2291 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
2292 | { | |
2293 | struct nfs4_stateowner *so = NULL; | |
2294 | ||
2295 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 2296 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
2297 | return so; |
2298 | } | |
2299 | return NULL; | |
2300 | } | |
2301 | ||
2302 | /* search file_hashtbl[] for file */ | |
2303 | static struct nfs4_file * | |
2304 | find_file(struct inode *ino) | |
2305 | { | |
2306 | unsigned int hashval = file_hashval(ino); | |
2307 | struct nfs4_file *fp; | |
2308 | ||
8b671b80 | 2309 | spin_lock(&recall_lock); |
1da177e4 | 2310 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2311 | if (fp->fi_inode == ino) { |
2312 | get_nfs4_file(fp); | |
8b671b80 | 2313 | spin_unlock(&recall_lock); |
1da177e4 | 2314 | return fp; |
13cd2184 | 2315 | } |
1da177e4 | 2316 | } |
8b671b80 | 2317 | spin_unlock(&recall_lock); |
1da177e4 LT |
2318 | return NULL; |
2319 | } | |
2320 | ||
d87a8ade | 2321 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2322 | { |
d87a8ade | 2323 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2324 | return 0; |
d87a8ade AA |
2325 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2326 | return 0; | |
2327 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2328 | if (minorversion && x) { | |
2329 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2330 | return 0; | |
2331 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2332 | return 0; | |
2333 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2334 | } | |
2335 | if (x) | |
8838dc43 BF |
2336 | return 0; |
2337 | return 1; | |
ba5a6a19 BF |
2338 | } |
2339 | ||
8838dc43 | 2340 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2341 | { |
8838dc43 BF |
2342 | /* Note: unlike access bits, deny bits may be zero. */ |
2343 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2344 | } |
1da177e4 | 2345 | |
1da177e4 LT |
2346 | /* |
2347 | * Called to check deny when READ with all zero stateid or | |
2348 | * WRITE with all zero or all one stateid | |
2349 | */ | |
b37ad28b | 2350 | static __be32 |
1da177e4 LT |
2351 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2352 | { | |
2353 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2354 | struct nfs4_file *fp; | |
2355 | struct nfs4_stateid *stp; | |
b37ad28b | 2356 | __be32 ret; |
1da177e4 LT |
2357 | |
2358 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2359 | ||
2360 | fp = find_file(ino); | |
13cd2184 N |
2361 | if (!fp) |
2362 | return nfs_ok; | |
b700949b | 2363 | ret = nfserr_locked; |
1da177e4 | 2364 | /* Search for conflicting share reservations */ |
13cd2184 N |
2365 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2366 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2367 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2368 | goto out; | |
1da177e4 | 2369 | } |
13cd2184 N |
2370 | ret = nfs_ok; |
2371 | out: | |
2372 | put_nfs4_file(fp); | |
2373 | return ret; | |
1da177e4 LT |
2374 | } |
2375 | ||
6b57d9c8 | 2376 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2377 | { |
1da177e4 LT |
2378 | /* We're assuming the state code never drops its reference |
2379 | * without first removing the lease. Since we're in this lease | |
2380 | * callback (and since the lease code is serialized by the kernel | |
2381 | * lock) we know the server hasn't removed the lease yet, we know | |
2382 | * it's safe to take a reference: */ | |
2383 | atomic_inc(&dp->dl_count); | |
2384 | ||
1da177e4 | 2385 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2386 | |
460781b5 | 2387 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2388 | dp->dl_time = get_seconds(); |
2389 | ||
6b57d9c8 BF |
2390 | nfsd4_cb_recall(dp); |
2391 | } | |
2392 | ||
acfdf5c3 | 2393 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2394 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2395 | { | |
acfdf5c3 BF |
2396 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2397 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2398 | |
acfdf5c3 BF |
2399 | BUG_ON(!fp); |
2400 | /* We assume break_lease is only called once per lease: */ | |
2401 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2402 | /* |
2403 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2404 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2405 | * in time: |
0272e1fd BF |
2406 | */ |
2407 | fl->fl_break_time = 0; | |
1da177e4 | 2408 | |
5d926e8c | 2409 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2410 | fp->fi_had_conflict = true; |
2411 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2412 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2413 | spin_unlock(&recall_lock); |
1da177e4 LT |
2414 | } |
2415 | ||
1da177e4 LT |
2416 | static |
2417 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2418 | { | |
2419 | if (arg & F_UNLCK) | |
2420 | return lease_modify(onlist, arg); | |
2421 | else | |
2422 | return -EAGAIN; | |
2423 | } | |
2424 | ||
7b021967 | 2425 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
8fb47a4f BF |
2426 | .lm_break = nfsd_break_deleg_cb, |
2427 | .lm_change = nfsd_change_deleg_cb, | |
1da177e4 LT |
2428 | }; |
2429 | ||
2430 | ||
b37ad28b | 2431 | __be32 |
6668958f AA |
2432 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2433 | struct nfsd4_open *open) | |
1da177e4 | 2434 | { |
1da177e4 LT |
2435 | clientid_t *clientid = &open->op_clientid; |
2436 | struct nfs4_client *clp = NULL; | |
2437 | unsigned int strhashval; | |
2438 | struct nfs4_stateowner *sop = NULL; | |
2439 | ||
1da177e4 | 2440 | if (!check_name(open->op_owner)) |
0f442aa2 | 2441 | return nfserr_inval; |
1da177e4 LT |
2442 | |
2443 | if (STALE_CLIENTID(&open->op_clientid)) | |
2444 | return nfserr_stale_clientid; | |
2445 | ||
2446 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2447 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2448 | open->op_stateowner = sop; |
2449 | if (!sop) { | |
2450 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2451 | clp = find_confirmed_client(clientid); |
2452 | if (clp == NULL) | |
0f442aa2 BF |
2453 | return nfserr_expired; |
2454 | goto renew; | |
1da177e4 | 2455 | } |
6668958f AA |
2456 | /* When sessions are used, skip open sequenceid processing */ |
2457 | if (nfsd4_has_session(cstate)) | |
2458 | goto renew; | |
0f442aa2 BF |
2459 | if (!sop->so_confirmed) { |
2460 | /* Replace unconfirmed owners without checking for replay. */ | |
2461 | clp = sop->so_client; | |
f044ff83 | 2462 | release_openowner(sop); |
0f442aa2 BF |
2463 | open->op_stateowner = NULL; |
2464 | goto renew; | |
2465 | } | |
2466 | if (open->op_seqid == sop->so_seqid - 1) { | |
2467 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2468 | return nfserr_replay_me; |
0f442aa2 BF |
2469 | /* The original OPEN failed so spectacularly |
2470 | * that we don't even have replay data saved! | |
2471 | * Therefore, we have no choice but to continue | |
2472 | * processing this OPEN; presumably, we'll | |
2473 | * fail again for the same reason. | |
2474 | */ | |
2475 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2476 | goto renew; | |
2477 | } | |
2478 | if (open->op_seqid != sop->so_seqid) | |
2479 | return nfserr_bad_seqid; | |
1da177e4 | 2480 | renew: |
0f442aa2 BF |
2481 | if (open->op_stateowner == NULL) { |
2482 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2483 | if (sop == NULL) | |
2484 | return nfserr_resource; | |
2485 | open->op_stateowner = sop; | |
2486 | } | |
2487 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2488 | renew_client(sop->so_client); |
0f442aa2 | 2489 | return nfs_ok; |
1da177e4 LT |
2490 | } |
2491 | ||
b37ad28b | 2492 | static inline __be32 |
4a6e43e6 N |
2493 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2494 | { | |
2495 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2496 | return nfserr_openmode; | |
2497 | else | |
2498 | return nfs_ok; | |
2499 | } | |
2500 | ||
52f4fb43 N |
2501 | static struct nfs4_delegation * |
2502 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2503 | { | |
32b007b4 | 2504 | struct nfs4_delegation *dp; |
52f4fb43 | 2505 | |
acfdf5c3 | 2506 | spin_lock(&recall_lock); |
32b007b4 BF |
2507 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) |
2508 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) { | |
2509 | spin_unlock(&recall_lock); | |
2510 | return dp; | |
2511 | } | |
acfdf5c3 | 2512 | spin_unlock(&recall_lock); |
32b007b4 | 2513 | return NULL; |
52f4fb43 N |
2514 | } |
2515 | ||
c47d832b | 2516 | static int share_access_to_flags(u32 share_access) |
24a0111e BF |
2517 | { |
2518 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2519 | ||
2520 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2521 | } | |
2522 | ||
b37ad28b | 2523 | static __be32 |
567d9829 N |
2524 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2525 | struct nfs4_delegation **dp) | |
2526 | { | |
2527 | int flags; | |
b37ad28b | 2528 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2529 | |
2530 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2531 | if (*dp == NULL) | |
c44c5eeb | 2532 | goto out; |
24a0111e | 2533 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2534 | status = nfs4_check_delegmode(*dp, flags); |
2535 | if (status) | |
2536 | *dp = NULL; | |
c44c5eeb N |
2537 | out: |
2538 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2539 | return nfs_ok; | |
2540 | if (status) | |
2541 | return status; | |
2542 | open->op_stateowner->so_confirmed = 1; | |
2543 | return nfs_ok; | |
567d9829 N |
2544 | } |
2545 | ||
b37ad28b | 2546 | static __be32 |
1da177e4 LT |
2547 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2548 | { | |
2549 | struct nfs4_stateid *local; | |
b37ad28b | 2550 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2551 | struct nfs4_stateowner *sop = open->op_stateowner; |
2552 | ||
8beefa24 | 2553 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2554 | /* ignore lock owners */ |
2555 | if (local->st_stateowner->so_is_open_owner == 0) | |
2556 | continue; | |
2557 | /* remember if we have seen this open owner */ | |
2558 | if (local->st_stateowner == sop) | |
2559 | *stpp = local; | |
2560 | /* check for conflicting share reservations */ | |
2561 | if (!test_share(local, open)) | |
2562 | goto out; | |
2563 | } | |
2564 | status = 0; | |
2565 | out: | |
2566 | return status; | |
2567 | } | |
2568 | ||
5ac049ac N |
2569 | static inline struct nfs4_stateid * |
2570 | nfs4_alloc_stateid(void) | |
2571 | { | |
2572 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2573 | } | |
2574 | ||
21fb4016 BF |
2575 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2576 | { | |
2577 | int flags = 0; | |
2578 | ||
2579 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2580 | flags |= NFSD_MAY_READ; | |
2581 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2582 | flags |= NFSD_MAY_WRITE; | |
2583 | return flags; | |
2584 | } | |
2585 | ||
0c12eaff CB |
2586 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, |
2587 | struct svc_fh *cur_fh, struct nfsd4_open *open) | |
f9d7562f BF |
2588 | { |
2589 | __be32 status; | |
0c12eaff CB |
2590 | int oflag = nfs4_access_to_omode(open->op_share_access); |
2591 | int access = nfs4_access_to_access(open->op_share_access); | |
2592 | ||
2593 | /* CLAIM_DELEGATE_CUR is used in response to a broken lease; | |
2594 | * allowing it to break the lease and return EAGAIN leaves the | |
2595 | * client unable to make progress in returning the delegation */ | |
2596 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2597 | access |= NFSD_MAY_NOT_BREAK_LEASE; | |
f9d7562f BF |
2598 | |
2599 | if (!fp->fi_fds[oflag]) { | |
2600 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2601 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2602 | if (status) |
2603 | return status; | |
2604 | } | |
2605 | nfs4_file_get_access(fp, oflag); | |
2606 | ||
2607 | return nfs_ok; | |
2608 | } | |
2609 | ||
b37ad28b | 2610 | static __be32 |
1da177e4 | 2611 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
f9d7562f BF |
2612 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2613 | struct nfsd4_open *open) | |
1da177e4 LT |
2614 | { |
2615 | struct nfs4_stateid *stp; | |
f9d7562f | 2616 | __be32 status; |
1da177e4 | 2617 | |
5ac049ac | 2618 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2619 | if (stp == NULL) |
2620 | return nfserr_resource; | |
2621 | ||
0c12eaff | 2622 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2623 | if (status) { |
2624 | kmem_cache_free(stateid_slab, stp); | |
2625 | return status; | |
1da177e4 | 2626 | } |
1da177e4 LT |
2627 | *stpp = stp; |
2628 | return 0; | |
2629 | } | |
2630 | ||
b37ad28b | 2631 | static inline __be32 |
1da177e4 LT |
2632 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2633 | struct nfsd4_open *open) | |
2634 | { | |
2635 | struct iattr iattr = { | |
2636 | .ia_valid = ATTR_SIZE, | |
2637 | .ia_size = 0, | |
2638 | }; | |
2639 | if (!open->op_truncate) | |
2640 | return 0; | |
2641 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2642 | return nfserr_inval; |
1da177e4 LT |
2643 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2644 | } | |
2645 | ||
b37ad28b | 2646 | static __be32 |
f9d7562f | 2647 | 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 | 2648 | { |
7d947842 BF |
2649 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2650 | bool new_access; | |
b37ad28b | 2651 | __be32 status; |
1da177e4 | 2652 | |
7d947842 | 2653 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2654 | if (new_access) { |
0c12eaff | 2655 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); |
f9d7562f BF |
2656 | if (status) |
2657 | return status; | |
6c26d08f | 2658 | } |
1da177e4 LT |
2659 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2660 | if (status) { | |
f9d7562f | 2661 | if (new_access) { |
f197c271 | 2662 | int oflag = nfs4_access_to_omode(op_share_access); |
f9d7562f BF |
2663 | nfs4_file_put_access(fp, oflag); |
2664 | } | |
1da177e4 LT |
2665 | return status; |
2666 | } | |
2667 | /* remember the open */ | |
24a0111e | 2668 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2669 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2670 | |
2671 | return nfs_ok; | |
2672 | } | |
2673 | ||
2674 | ||
1da177e4 | 2675 | static void |
37515177 | 2676 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2677 | { |
37515177 N |
2678 | open->op_stateowner->so_confirmed = 1; |
2679 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2680 | } |
2681 | ||
14a24e99 BF |
2682 | /* Should we give out recallable state?: */ |
2683 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2684 | { | |
2685 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2686 | return true; | |
2687 | /* | |
2688 | * In the sessions case, since we don't have to establish a | |
2689 | * separate connection for callbacks, we assume it's OK | |
2690 | * until we hear otherwise: | |
2691 | */ | |
2692 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2693 | } | |
2694 | ||
22d38c4c BF |
2695 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2696 | { | |
2697 | struct file_lock *fl; | |
2698 | ||
2699 | fl = locks_alloc_lock(); | |
2700 | if (!fl) | |
2701 | return NULL; | |
2702 | locks_init_lock(fl); | |
2703 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2704 | fl->fl_flags = FL_LEASE; | |
2705 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2706 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2707 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2708 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2709 | return fl; |
2710 | } | |
2711 | ||
edab9782 BF |
2712 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2713 | { | |
acfdf5c3 | 2714 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2715 | struct file_lock *fl; |
2716 | int status; | |
2717 | ||
2718 | fl = nfs4_alloc_init_lease(dp, flag); | |
2719 | if (!fl) | |
2720 | return -ENOMEM; | |
acfdf5c3 BF |
2721 | fl->fl_file = find_readable_file(fp); |
2722 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
2723 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); | |
edab9782 | 2724 | if (status) { |
acfdf5c3 | 2725 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2726 | locks_free_lock(fl); |
2727 | return -ENOMEM; | |
2728 | } | |
acfdf5c3 BF |
2729 | fp->fi_lease = fl; |
2730 | fp->fi_deleg_file = fl->fl_file; | |
2731 | get_file(fp->fi_deleg_file); | |
2732 | atomic_set(&fp->fi_delegees, 1); | |
2733 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2734 | return 0; | |
2735 | } | |
2736 | ||
2737 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2738 | { | |
2739 | struct nfs4_file *fp = dp->dl_file; | |
2740 | ||
2741 | if (!fp->fi_lease) | |
2742 | return nfs4_setlease(dp, flag); | |
2743 | spin_lock(&recall_lock); | |
2744 | if (fp->fi_had_conflict) { | |
2745 | spin_unlock(&recall_lock); | |
2746 | return -EAGAIN; | |
2747 | } | |
2748 | atomic_inc(&fp->fi_delegees); | |
2749 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2750 | spin_unlock(&recall_lock); | |
2751 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
edab9782 BF |
2752 | return 0; |
2753 | } | |
2754 | ||
1da177e4 LT |
2755 | /* |
2756 | * Attempt to hand out a delegation. | |
2757 | */ | |
2758 | static void | |
2759 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2760 | { | |
2761 | struct nfs4_delegation *dp; | |
2762 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
14a24e99 | 2763 | int cb_up; |
1da177e4 LT |
2764 | int status, flag = 0; |
2765 | ||
14a24e99 | 2766 | cb_up = nfsd4_cb_channel_good(sop->so_client); |
1da177e4 | 2767 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2768 | open->op_recall = 0; |
2769 | switch (open->op_claim_type) { | |
2770 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2771 | if (!cb_up) |
7b190fec N |
2772 | open->op_recall = 1; |
2773 | flag = open->op_delegate_type; | |
2774 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2775 | goto out; | |
2776 | break; | |
2777 | case NFS4_OPEN_CLAIM_NULL: | |
2778 | /* Let's not give out any delegations till everyone's | |
2779 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2780 | if (locks_in_grace()) |
7b190fec | 2781 | goto out; |
2bf23875 | 2782 | if (!cb_up || !sop->so_confirmed) |
7b190fec N |
2783 | goto out; |
2784 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2785 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2786 | else | |
2787 | flag = NFS4_OPEN_DELEGATE_READ; | |
2788 | break; | |
2789 | default: | |
2790 | goto out; | |
2791 | } | |
1da177e4 LT |
2792 | |
2793 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
dd239cc0 BF |
2794 | if (dp == NULL) |
2795 | goto out_no_deleg; | |
acfdf5c3 | 2796 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2797 | if (status) |
dd239cc0 | 2798 | goto out_free; |
1da177e4 LT |
2799 | |
2800 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2801 | ||
8c10cbdb BH |
2802 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2803 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2804 | out: |
7b190fec N |
2805 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2806 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2807 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2808 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2809 | open->op_delegate_type = flag; |
dd239cc0 BF |
2810 | return; |
2811 | out_free: | |
acfdf5c3 | 2812 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2813 | out_no_deleg: |
2814 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2815 | goto out; | |
1da177e4 LT |
2816 | } |
2817 | ||
2818 | /* | |
2819 | * called with nfs4_lock_state() held. | |
2820 | */ | |
b37ad28b | 2821 | __be32 |
1da177e4 LT |
2822 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2823 | { | |
6668958f | 2824 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2825 | struct nfs4_file *fp = NULL; |
2826 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2827 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2828 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2829 | __be32 status; |
1da177e4 LT |
2830 | |
2831 | status = nfserr_inval; | |
d87a8ade | 2832 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2833 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2834 | goto out; |
2835 | /* | |
2836 | * Lookup file; if found, lookup stateid and check open request, | |
2837 | * and check for delegations in the process of being recalled. | |
2838 | * If not found, create the nfs4_file struct | |
2839 | */ | |
2840 | fp = find_file(ino); | |
2841 | if (fp) { | |
2842 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2843 | goto out; | |
c44c5eeb N |
2844 | status = nfs4_check_deleg(fp, open, &dp); |
2845 | if (status) | |
2846 | goto out; | |
1da177e4 | 2847 | } else { |
c44c5eeb N |
2848 | status = nfserr_bad_stateid; |
2849 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2850 | goto out; | |
1da177e4 LT |
2851 | status = nfserr_resource; |
2852 | fp = alloc_init_file(ino); | |
2853 | if (fp == NULL) | |
2854 | goto out; | |
2855 | } | |
2856 | ||
2857 | /* | |
2858 | * OPEN the file, or upgrade an existing OPEN. | |
2859 | * If truncate fails, the OPEN fails. | |
2860 | */ | |
2861 | if (stp) { | |
2862 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2863 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2864 | if (status) |
2865 | goto out; | |
444c2c07 | 2866 | update_stateid(&stp->st_stateid); |
1da177e4 | 2867 | } else { |
f9d7562f | 2868 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2869 | if (status) |
1da177e4 LT |
2870 | goto out; |
2871 | init_stateid(stp, fp, open); | |
2872 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2873 | if (status) { | |
2283963f | 2874 | release_open_stateid(stp); |
1da177e4 LT |
2875 | goto out; |
2876 | } | |
6668958f AA |
2877 | if (nfsd4_has_session(&resp->cstate)) |
2878 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2879 | } |
2880 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2881 | ||
4dc6ec00 | 2882 | if (nfsd4_has_session(&resp->cstate)) |
6668958f AA |
2883 | open->op_stateowner->so_confirmed = 1; |
2884 | ||
1da177e4 LT |
2885 | /* |
2886 | * Attempt to hand out a delegation. No error return, because the | |
2887 | * OPEN succeeds even if we fail. | |
2888 | */ | |
2889 | nfs4_open_delegation(current_fh, open, stp); | |
2890 | ||
2891 | status = nfs_ok; | |
2892 | ||
8c10cbdb BH |
2893 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2894 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2895 | out: |
13cd2184 N |
2896 | if (fp) |
2897 | put_nfs4_file(fp); | |
37515177 N |
2898 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2899 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2900 | /* |
2901 | * To finish the open response, we just need to set the rflags. | |
2902 | */ | |
2903 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2904 | if (!open->op_stateowner->so_confirmed && |
2905 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2906 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2907 | ||
2908 | return status; | |
2909 | } | |
2910 | ||
b37ad28b | 2911 | __be32 |
b591480b BF |
2912 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2913 | clientid_t *clid) | |
1da177e4 LT |
2914 | { |
2915 | struct nfs4_client *clp; | |
b37ad28b | 2916 | __be32 status; |
1da177e4 LT |
2917 | |
2918 | nfs4_lock_state(); | |
2919 | dprintk("process_renew(%08x/%08x): starting\n", | |
2920 | clid->cl_boot, clid->cl_id); | |
2921 | status = nfserr_stale_clientid; | |
2922 | if (STALE_CLIENTID(clid)) | |
2923 | goto out; | |
2924 | clp = find_confirmed_client(clid); | |
2925 | status = nfserr_expired; | |
2926 | if (clp == NULL) { | |
2927 | /* We assume the client took too long to RENEW. */ | |
2928 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2929 | goto out; | |
2930 | } | |
2931 | renew_client(clp); | |
2932 | status = nfserr_cb_path_down; | |
ea1da636 | 2933 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 2934 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
2935 | goto out; |
2936 | status = nfs_ok; | |
2937 | out: | |
2938 | nfs4_unlock_state(); | |
2939 | return status; | |
2940 | } | |
2941 | ||
c47d832b | 2942 | static struct lock_manager nfsd4_manager = { |
af558e33 BF |
2943 | }; |
2944 | ||
a76b4319 | 2945 | static void |
af558e33 | 2946 | nfsd4_end_grace(void) |
a76b4319 N |
2947 | { |
2948 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2949 | nfsd4_recdir_purge_old(); |
af558e33 | 2950 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2951 | /* |
2952 | * Now that every NFSv4 client has had the chance to recover and | |
2953 | * to see the (possibly new, possibly shorter) lease time, we | |
2954 | * can safely set the next grace time to the current lease time: | |
2955 | */ | |
2956 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2957 | } |
2958 | ||
fd39ca9a | 2959 | static time_t |
1da177e4 LT |
2960 | nfs4_laundromat(void) |
2961 | { | |
2962 | struct nfs4_client *clp; | |
2963 | struct nfs4_stateowner *sop; | |
2964 | struct nfs4_delegation *dp; | |
2965 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
2966 | time_t cutoff = get_seconds() - nfsd4_lease; |
2967 | time_t t, clientid_val = nfsd4_lease; | |
2968 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
2969 | |
2970 | nfs4_lock_state(); | |
2971 | ||
2972 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2973 | if (locks_in_grace()) |
2974 | nfsd4_end_grace(); | |
36acb66b BH |
2975 | INIT_LIST_HEAD(&reaplist); |
2976 | spin_lock(&client_lock); | |
1da177e4 LT |
2977 | list_for_each_safe(pos, next, &client_lru) { |
2978 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2979 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2980 | t = clp->cl_time - cutoff; | |
2981 | if (clientid_val > t) | |
2982 | clientid_val = t; | |
2983 | break; | |
2984 | } | |
d7682988 BH |
2985 | if (atomic_read(&clp->cl_refcount)) { |
2986 | dprintk("NFSD: client in use (clientid %08x)\n", | |
2987 | clp->cl_clientid.cl_id); | |
2988 | continue; | |
2989 | } | |
2990 | unhash_client_locked(clp); | |
2991 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
2992 | } |
2993 | spin_unlock(&client_lock); | |
2994 | list_for_each_safe(pos, next, &reaplist) { | |
2995 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
2996 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
2997 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2998 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2999 | expire_client(clp); |
3000 | } | |
1da177e4 LT |
3001 | spin_lock(&recall_lock); |
3002 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3003 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3004 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
3005 | u = dp->dl_time - cutoff; | |
3006 | if (test_val > u) | |
3007 | test_val = u; | |
3008 | break; | |
3009 | } | |
1da177e4 LT |
3010 | list_move(&dp->dl_recall_lru, &reaplist); |
3011 | } | |
3012 | spin_unlock(&recall_lock); | |
3013 | list_for_each_safe(pos, next, &reaplist) { | |
3014 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3015 | list_del_init(&dp->dl_recall_lru); | |
3016 | unhash_delegation(dp); | |
3017 | } | |
cf07d2ea | 3018 | test_val = nfsd4_lease; |
1da177e4 LT |
3019 | list_for_each_safe(pos, next, &close_lru) { |
3020 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
3021 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
3022 | u = sop->so_time - cutoff; | |
3023 | if (test_val > u) | |
3024 | test_val = u; | |
3025 | break; | |
3026 | } | |
3027 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
3028 | sop->so_id); | |
f044ff83 | 3029 | release_openowner(sop); |
1da177e4 LT |
3030 | } |
3031 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
3032 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
3033 | nfs4_unlock_state(); | |
3034 | return clientid_val; | |
3035 | } | |
3036 | ||
a254b246 HH |
3037 | static struct workqueue_struct *laundry_wq; |
3038 | static void laundromat_main(struct work_struct *); | |
3039 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
3040 | ||
3041 | static void | |
c4028958 | 3042 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
3043 | { |
3044 | time_t t; | |
3045 | ||
3046 | t = nfs4_laundromat(); | |
3047 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 3048 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
3049 | } |
3050 | ||
fd39ca9a | 3051 | static struct nfs4_stateowner * |
f8816512 N |
3052 | search_close_lru(u32 st_id, int flags) |
3053 | { | |
1da177e4 LT |
3054 | struct nfs4_stateowner *local = NULL; |
3055 | ||
1da177e4 LT |
3056 | if (flags & CLOSE_STATE) { |
3057 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
3058 | if (local->so_id == st_id) | |
3059 | return local; | |
3060 | } | |
3061 | } | |
3062 | return NULL; | |
3063 | } | |
3064 | ||
3065 | static inline int | |
3066 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
3067 | { | |
f9d7562f | 3068 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
3069 | } |
3070 | ||
3071 | static int | |
3072 | STALE_STATEID(stateid_t *stateid) | |
3073 | { | |
e4e83ea4 BF |
3074 | if (stateid->si_boot == boot_time) |
3075 | return 0; | |
3076 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3077 | STATEID_VAL(stateid)); |
e4e83ea4 | 3078 | return 1; |
1da177e4 LT |
3079 | } |
3080 | ||
3081 | static inline int | |
3082 | access_permit_read(unsigned long access_bmap) | |
3083 | { | |
3084 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3085 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3086 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3087 | } | |
3088 | ||
3089 | static inline int | |
3090 | access_permit_write(unsigned long access_bmap) | |
3091 | { | |
3092 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3093 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3094 | } | |
3095 | ||
3096 | static | |
b37ad28b | 3097 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 3098 | { |
b37ad28b | 3099 | __be32 status = nfserr_openmode; |
1da177e4 | 3100 | |
02921914 BF |
3101 | /* For lock stateid's, we test the parent open, not the lock: */ |
3102 | if (stp->st_openstp) | |
3103 | stp = stp->st_openstp; | |
1da177e4 LT |
3104 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3105 | goto out; | |
3106 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3107 | goto out; | |
3108 | status = nfs_ok; | |
3109 | out: | |
3110 | return status; | |
3111 | } | |
3112 | ||
b37ad28b | 3113 | static inline __be32 |
1da177e4 LT |
3114 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3115 | { | |
203a8c8e | 3116 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3117 | return nfs_ok; |
af558e33 | 3118 | else if (locks_in_grace()) { |
25985edc | 3119 | /* Answer in remaining cases depends on existence of |
1da177e4 LT |
3120 | * conflicting state; so we must wait out the grace period. */ |
3121 | return nfserr_grace; | |
3122 | } else if (flags & WR_STATE) | |
3123 | return nfs4_share_conflict(current_fh, | |
3124 | NFS4_SHARE_DENY_WRITE); | |
3125 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3126 | return nfs4_share_conflict(current_fh, | |
3127 | NFS4_SHARE_DENY_READ); | |
3128 | } | |
3129 | ||
3130 | /* | |
3131 | * Allow READ/WRITE during grace period on recovered state only for files | |
3132 | * that are not able to provide mandatory locking. | |
3133 | */ | |
3134 | static inline int | |
18f82731 | 3135 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3136 | { |
203a8c8e | 3137 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3138 | } |
3139 | ||
6668958f | 3140 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 3141 | { |
6668958f AA |
3142 | /* |
3143 | * When sessions are used the stateid generation number is ignored | |
3144 | * when it is zero. | |
3145 | */ | |
3146 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
3147 | goto out; | |
3148 | ||
0836f587 BF |
3149 | /* If the client sends us a stateid from the future, it's buggy: */ |
3150 | if (in->si_generation > ref->si_generation) | |
3151 | return nfserr_bad_stateid; | |
3152 | /* | |
3153 | * The following, however, can happen. For example, if the | |
3154 | * client sends an open and some IO at the same time, the open | |
3155 | * may bump si_generation while the IO is still in flight. | |
3156 | * Thanks to hard links and renames, the client never knows what | |
3157 | * file an open will affect. So it could avoid that situation | |
3158 | * only by serializing all opens and IO from the same open | |
3159 | * owner. To recover from the old_stateid error, the client | |
3160 | * will just have to retry the IO: | |
3161 | */ | |
3162 | if (in->si_generation < ref->si_generation) | |
3163 | return nfserr_old_stateid; | |
6668958f | 3164 | out: |
0836f587 BF |
3165 | return nfs_ok; |
3166 | } | |
3167 | ||
3e633079 BF |
3168 | static int is_delegation_stateid(stateid_t *stateid) |
3169 | { | |
3170 | return stateid->si_fileid == 0; | |
3171 | } | |
3172 | ||
e1ca12df BS |
3173 | static int is_open_stateid(struct nfs4_stateid *stateid) |
3174 | { | |
3175 | return stateid->st_openstp == NULL; | |
3176 | } | |
3177 | ||
17456804 BS |
3178 | __be32 nfs4_validate_stateid(stateid_t *stateid, int flags) |
3179 | { | |
3180 | struct nfs4_stateid *stp = NULL; | |
3181 | __be32 status = nfserr_stale_stateid; | |
3182 | ||
3183 | if (STALE_STATEID(stateid)) | |
3184 | goto out; | |
3185 | ||
3186 | status = nfserr_expired; | |
3187 | stp = search_for_stateid(stateid); | |
3188 | if (!stp) | |
3189 | goto out; | |
3190 | status = nfserr_bad_stateid; | |
3191 | ||
3192 | if (!stp->st_stateowner->so_confirmed) | |
3193 | goto out; | |
3194 | ||
3195 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); | |
3196 | if (status) | |
3197 | goto out; | |
3198 | ||
3199 | status = nfs_ok; | |
3200 | out: | |
3201 | return status; | |
3202 | } | |
3203 | ||
1da177e4 LT |
3204 | /* |
3205 | * Checks for stateid operations | |
3206 | */ | |
b37ad28b | 3207 | __be32 |
dd453dfd BH |
3208 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3209 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
3210 | { |
3211 | struct nfs4_stateid *stp = NULL; | |
3212 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 3213 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3214 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3215 | __be32 status; |
1da177e4 | 3216 | |
1da177e4 LT |
3217 | if (filpp) |
3218 | *filpp = NULL; | |
3219 | ||
18f82731 | 3220 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3221 | return nfserr_grace; |
3222 | ||
6668958f AA |
3223 | if (nfsd4_has_session(cstate)) |
3224 | flags |= HAS_SESSION; | |
3225 | ||
1da177e4 LT |
3226 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3227 | return check_special_stateids(current_fh, stateid, flags); | |
3228 | ||
1da177e4 LT |
3229 | status = nfserr_stale_stateid; |
3230 | if (STALE_STATEID(stateid)) | |
3231 | goto out; | |
3232 | ||
33515142 BF |
3233 | /* |
3234 | * We assume that any stateid that has the current boot time, | |
3235 | * but that we can't find, is expired: | |
3236 | */ | |
3237 | status = nfserr_expired; | |
3e633079 | 3238 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 3239 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 3240 | if (!dp) |
1da177e4 | 3241 | goto out; |
6668958f AA |
3242 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
3243 | flags); | |
0c2a498f BF |
3244 | if (status) |
3245 | goto out; | |
dc9bf700 BF |
3246 | status = nfs4_check_delegmode(dp, flags); |
3247 | if (status) | |
3248 | goto out; | |
3249 | renew_client(dp->dl_client); | |
43b0178e | 3250 | if (filpp) { |
acfdf5c3 | 3251 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3252 | BUG_ON(!*filpp); |
3253 | } | |
1da177e4 | 3254 | } else { /* open or lock stateid */ |
a4455be0 | 3255 | stp = find_stateid(stateid, flags); |
e4e83ea4 | 3256 | if (!stp) |
1da177e4 | 3257 | goto out; |
33515142 | 3258 | status = nfserr_bad_stateid; |
6150ef0d | 3259 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
3260 | goto out; |
3261 | if (!stp->st_stateowner->so_confirmed) | |
3262 | goto out; | |
6668958f AA |
3263 | status = check_stateid_generation(stateid, &stp->st_stateid, |
3264 | flags); | |
0c2a498f BF |
3265 | if (status) |
3266 | goto out; | |
a4455be0 BF |
3267 | status = nfs4_check_openmode(stp, flags); |
3268 | if (status) | |
1da177e4 LT |
3269 | goto out; |
3270 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3271 | if (filpp) { |
3272 | if (flags & RD_STATE) | |
3273 | *filpp = find_readable_file(stp->st_file); | |
3274 | else | |
3275 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3276 | } |
1da177e4 LT |
3277 | } |
3278 | status = nfs_ok; | |
3279 | out: | |
3280 | return status; | |
3281 | } | |
3282 | ||
e1ca12df BS |
3283 | static __be32 |
3284 | nfsd4_free_delegation_stateid(stateid_t *stateid) | |
3285 | { | |
3286 | struct nfs4_delegation *dp = search_for_delegation(stateid); | |
3287 | if (dp) | |
3288 | return nfserr_locks_held; | |
3289 | return nfserr_bad_stateid; | |
3290 | } | |
3291 | ||
3292 | static __be32 | |
3293 | nfsd4_free_lock_stateid(struct nfs4_stateid *stp) | |
3294 | { | |
3295 | if (check_for_locks(stp->st_file, stp->st_stateowner)) | |
3296 | return nfserr_locks_held; | |
3297 | release_lock_stateid(stp); | |
3298 | return nfs_ok; | |
3299 | } | |
3300 | ||
17456804 BS |
3301 | /* |
3302 | * Test if the stateid is valid | |
3303 | */ | |
3304 | __be32 | |
3305 | nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3306 | struct nfsd4_test_stateid *test_stateid) | |
3307 | { | |
3308 | test_stateid->ts_has_session = nfsd4_has_session(cstate); | |
3309 | return nfs_ok; | |
3310 | } | |
3311 | ||
e1ca12df BS |
3312 | /* |
3313 | * Free a state id | |
3314 | */ | |
3315 | __be32 | |
3316 | nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
3317 | struct nfsd4_free_stateid *free_stateid) | |
3318 | { | |
3319 | stateid_t *stateid = &free_stateid->fr_stateid; | |
3320 | struct nfs4_stateid *stp; | |
3321 | __be32 ret; | |
3322 | ||
3323 | nfs4_lock_state(); | |
3324 | if (is_delegation_stateid(stateid)) { | |
3325 | ret = nfsd4_free_delegation_stateid(stateid); | |
3326 | goto out; | |
3327 | } | |
3328 | ||
3329 | stp = search_for_stateid(stateid); | |
3330 | if (!stp) { | |
3331 | ret = nfserr_bad_stateid; | |
3332 | goto out; | |
3333 | } | |
3334 | if (stateid->si_generation != 0) { | |
3335 | if (stateid->si_generation < stp->st_stateid.si_generation) { | |
3336 | ret = nfserr_old_stateid; | |
3337 | goto out; | |
3338 | } | |
3339 | if (stateid->si_generation > stp->st_stateid.si_generation) { | |
3340 | ret = nfserr_bad_stateid; | |
3341 | goto out; | |
3342 | } | |
3343 | } | |
3344 | ||
3345 | if (is_open_stateid(stp)) { | |
3346 | ret = nfserr_locks_held; | |
3347 | goto out; | |
3348 | } else { | |
3349 | ret = nfsd4_free_lock_stateid(stp); | |
3350 | goto out; | |
3351 | } | |
3352 | ||
3353 | out: | |
3354 | nfs4_unlock_state(); | |
3355 | return ret; | |
3356 | } | |
3357 | ||
4c4cd222 N |
3358 | static inline int |
3359 | setlkflg (int type) | |
3360 | { | |
3361 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3362 | RD_STATE : WR_STATE; | |
3363 | } | |
1da177e4 LT |
3364 | |
3365 | /* | |
3366 | * Checks for sequence id mutating operations. | |
3367 | */ | |
b37ad28b | 3368 | static __be32 |
dd453dfd BH |
3369 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3370 | stateid_t *stateid, int flags, | |
3371 | struct nfs4_stateowner **sopp, | |
3372 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 3373 | { |
1da177e4 LT |
3374 | struct nfs4_stateid *stp; |
3375 | struct nfs4_stateowner *sop; | |
dd453dfd | 3376 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 3377 | __be32 status; |
1da177e4 | 3378 | |
8c10cbdb BH |
3379 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3380 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3381 | |
1da177e4 LT |
3382 | *stpp = NULL; |
3383 | *sopp = NULL; | |
3384 | ||
1da177e4 | 3385 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 3386 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 3387 | return nfserr_bad_stateid; |
1da177e4 LT |
3388 | } |
3389 | ||
1da177e4 | 3390 | if (STALE_STATEID(stateid)) |
3a4f98bb | 3391 | return nfserr_stale_stateid; |
6668958f AA |
3392 | |
3393 | if (nfsd4_has_session(cstate)) | |
3394 | flags |= HAS_SESSION; | |
3395 | ||
1da177e4 LT |
3396 | /* |
3397 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
3398 | * the confirmed flag is incorrecly set, or the generation | |
3399 | * number is incorrect. | |
1da177e4 | 3400 | */ |
f8816512 N |
3401 | stp = find_stateid(stateid, flags); |
3402 | if (stp == NULL) { | |
3403 | /* | |
3404 | * Also, we should make sure this isn't just the result of | |
3405 | * a replayed close: | |
3406 | */ | |
3407 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
33515142 | 3408 | /* It's not stale; let's assume it's expired: */ |
f8816512 | 3409 | if (sop == NULL) |
33515142 | 3410 | return nfserr_expired; |
f8816512 N |
3411 | *sopp = sop; |
3412 | goto check_replay; | |
3413 | } | |
1da177e4 | 3414 | |
39325bd0 BF |
3415 | *stpp = stp; |
3416 | *sopp = sop = stp->st_stateowner; | |
3417 | ||
4c4cd222 | 3418 | if (lock) { |
4c4cd222 | 3419 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 3420 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 3421 | int lkflg = 0; |
b37ad28b | 3422 | __be32 status; |
4c4cd222 N |
3423 | |
3424 | lkflg = setlkflg(lock->lk_type); | |
3425 | ||
3426 | if (lock->lk_is_new) { | |
599e0a22 BF |
3427 | if (!sop->so_is_open_owner) |
3428 | return nfserr_bad_stateid; | |
60adfc50 AA |
3429 | if (!(flags & HAS_SESSION) && |
3430 | !same_clid(&clp->cl_clientid, lockclid)) | |
3431 | return nfserr_bad_stateid; | |
599e0a22 BF |
3432 | /* stp is the open stateid */ |
3433 | status = nfs4_check_openmode(stp, lkflg); | |
3434 | if (status) | |
3435 | return status; | |
3436 | } else { | |
3437 | /* stp is the lock stateid */ | |
3438 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
3439 | if (status) | |
3440 | return status; | |
4c4cd222 | 3441 | } |
1da177e4 LT |
3442 | } |
3443 | ||
f3362737 | 3444 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 3445 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 3446 | return nfserr_bad_stateid; |
1da177e4 LT |
3447 | } |
3448 | ||
1da177e4 LT |
3449 | /* |
3450 | * We now validate the seqid and stateid generation numbers. | |
3451 | * For the moment, we ignore the possibility of | |
3452 | * generation number wraparound. | |
3453 | */ | |
6668958f | 3454 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
3455 | goto check_replay; |
3456 | ||
3a4f98bb | 3457 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 3458 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3459 | " unconfirmed stateowner!\n"); |
3460 | return nfserr_bad_stateid; | |
1da177e4 | 3461 | } |
3a4f98bb | 3462 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3463 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3464 | " confirmed yet!\n"); |
3465 | return nfserr_bad_stateid; | |
1da177e4 | 3466 | } |
6668958f | 3467 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
3468 | if (status) |
3469 | return status; | |
52fd004e | 3470 | renew_client(sop->so_client); |
3a4f98bb | 3471 | return nfs_ok; |
1da177e4 | 3472 | |
1da177e4 | 3473 | check_replay: |
bd9aac52 | 3474 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3475 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3476 | /* indicate replay to calling function */ |
a90b061c | 3477 | return nfserr_replay_me; |
1da177e4 | 3478 | } |
2fdada03 | 3479 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3480 | sop->so_seqid, seqid); |
3481 | *sopp = NULL; | |
3482 | return nfserr_bad_seqid; | |
1da177e4 LT |
3483 | } |
3484 | ||
b37ad28b | 3485 | __be32 |
ca364317 | 3486 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3487 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3488 | { |
b37ad28b | 3489 | __be32 status; |
1da177e4 LT |
3490 | struct nfs4_stateowner *sop; |
3491 | struct nfs4_stateid *stp; | |
3492 | ||
3493 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3494 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3495 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3496 | |
ca364317 | 3497 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3498 | if (status) |
3499 | return status; | |
1da177e4 LT |
3500 | |
3501 | nfs4_lock_state(); | |
3502 | ||
dd453dfd | 3503 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3504 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3505 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3506 | &oc->oc_stateowner, &stp, NULL))) |
3507 | goto out; | |
3508 | ||
3509 | sop = oc->oc_stateowner; | |
3510 | sop->so_confirmed = 1; | |
3511 | update_stateid(&stp->st_stateid); | |
3512 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3513 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3514 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
3515 | |
3516 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3517 | out: |
f2327d9a | 3518 | if (oc->oc_stateowner) { |
1da177e4 | 3519 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3520 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3521 | } |
1da177e4 LT |
3522 | nfs4_unlock_state(); |
3523 | return status; | |
3524 | } | |
3525 | ||
f197c271 | 3526 | static inline void nfs4_file_downgrade(struct nfs4_stateid *stp, unsigned int to_access) |
1da177e4 LT |
3527 | { |
3528 | int i; | |
f197c271 | 3529 | |
1da177e4 | 3530 | for (i = 1; i < 4; i++) { |
f197c271 BF |
3531 | if (test_bit(i, &stp->st_access_bmap) && !(i & to_access)) { |
3532 | nfs4_file_put_access(stp->st_file, i); | |
3533 | __clear_bit(i, &stp->st_access_bmap); | |
3534 | } | |
1da177e4 LT |
3535 | } |
3536 | } | |
3537 | ||
3538 | static void | |
3539 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3540 | { | |
3541 | int i; | |
3542 | for (i = 0; i < 4; i++) { | |
3543 | if ((i & deny) != i) | |
3544 | __clear_bit(i, bmap); | |
3545 | } | |
3546 | } | |
3547 | ||
b37ad28b | 3548 | __be32 |
ca364317 BF |
3549 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3550 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3551 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3552 | { |
b37ad28b | 3553 | __be32 status; |
1da177e4 | 3554 | struct nfs4_stateid *stp; |
1da177e4 LT |
3555 | |
3556 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3557 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3558 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3559 | |
d87a8ade | 3560 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3561 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3562 | return nfserr_inval; |
3563 | ||
3564 | nfs4_lock_state(); | |
dd453dfd | 3565 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3566 | od->od_seqid, |
1da177e4 | 3567 | &od->od_stateid, |
f3362737 | 3568 | OPEN_STATE, |
1da177e4 LT |
3569 | &od->od_stateowner, &stp, NULL))) |
3570 | goto out; | |
3571 | ||
3572 | status = nfserr_inval; | |
3573 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3574 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3575 | stp->st_access_bmap, od->od_share_access); | |
3576 | goto out; | |
3577 | } | |
3578 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3579 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3580 | stp->st_deny_bmap, od->od_share_deny); | |
3581 | goto out; | |
3582 | } | |
f197c271 | 3583 | nfs4_file_downgrade(stp, od->od_share_access); |
1da177e4 | 3584 | |
1da177e4 LT |
3585 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
3586 | ||
3587 | update_stateid(&stp->st_stateid); | |
3588 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3589 | status = nfs_ok; | |
3590 | out: | |
f2327d9a | 3591 | if (od->od_stateowner) { |
1da177e4 | 3592 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3593 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3594 | } |
1da177e4 LT |
3595 | nfs4_unlock_state(); |
3596 | return status; | |
3597 | } | |
3598 | ||
3599 | /* | |
3600 | * nfs4_unlock_state() called after encode | |
3601 | */ | |
b37ad28b | 3602 | __be32 |
ca364317 | 3603 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3604 | struct nfsd4_close *close) |
1da177e4 | 3605 | { |
b37ad28b | 3606 | __be32 status; |
1da177e4 LT |
3607 | struct nfs4_stateid *stp; |
3608 | ||
3609 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3610 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3611 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3612 | |
3613 | nfs4_lock_state(); | |
3614 | /* check close_lru for replay */ | |
dd453dfd | 3615 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3616 | close->cl_seqid, |
1da177e4 | 3617 | &close->cl_stateid, |
f3362737 | 3618 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3619 | &close->cl_stateowner, &stp, NULL))) |
3620 | goto out; | |
1da177e4 LT |
3621 | status = nfs_ok; |
3622 | update_stateid(&stp->st_stateid); | |
3623 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3624 | ||
04ef5954 | 3625 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3626 | release_open_stateid(stp); |
04ef5954 BF |
3627 | |
3628 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3629 | * released by the laundromat service after the lease period | |
3630 | * to enable us to handle CLOSE replay | |
3631 | */ | |
3632 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3633 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3634 | out: |
f2327d9a | 3635 | if (close->cl_stateowner) { |
1da177e4 | 3636 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3637 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3638 | } |
1da177e4 LT |
3639 | nfs4_unlock_state(); |
3640 | return status; | |
3641 | } | |
3642 | ||
b37ad28b | 3643 | __be32 |
ca364317 BF |
3644 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3645 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3646 | { |
203a8c8e BF |
3647 | struct nfs4_delegation *dp; |
3648 | stateid_t *stateid = &dr->dr_stateid; | |
3649 | struct inode *inode; | |
b37ad28b | 3650 | __be32 status; |
6668958f | 3651 | int flags = 0; |
1da177e4 | 3652 | |
ca364317 | 3653 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3654 | return status; |
3655 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3656 | |
6668958f AA |
3657 | if (nfsd4_has_session(cstate)) |
3658 | flags |= HAS_SESSION; | |
1da177e4 | 3659 | nfs4_lock_state(); |
203a8c8e BF |
3660 | status = nfserr_bad_stateid; |
3661 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3662 | goto out; | |
3663 | status = nfserr_stale_stateid; | |
3664 | if (STALE_STATEID(stateid)) | |
3665 | goto out; | |
7e0f7cf5 | 3666 | status = nfserr_bad_stateid; |
203a8c8e BF |
3667 | if (!is_delegation_stateid(stateid)) |
3668 | goto out; | |
33515142 | 3669 | status = nfserr_expired; |
203a8c8e | 3670 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3671 | if (!dp) |
203a8c8e | 3672 | goto out; |
6668958f | 3673 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3674 | if (status) |
3675 | goto out; | |
3676 | renew_client(dp->dl_client); | |
3677 | ||
3678 | unhash_delegation(dp); | |
1da177e4 | 3679 | out: |
203a8c8e BF |
3680 | nfs4_unlock_state(); |
3681 | ||
1da177e4 LT |
3682 | return status; |
3683 | } | |
3684 | ||
3685 | ||
3686 | /* | |
3687 | * Lock owner state (byte-range locks) | |
3688 | */ | |
3689 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3690 | #define LOCK_HASH_BITS 8 | |
3691 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3692 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3693 | ||
87df4de8 BH |
3694 | static inline u64 |
3695 | end_offset(u64 start, u64 len) | |
3696 | { | |
3697 | u64 end; | |
3698 | ||
3699 | end = start + len; | |
3700 | return end >= start ? end: NFS4_MAX_UINT64; | |
3701 | } | |
3702 | ||
3703 | /* last octet in a range */ | |
3704 | static inline u64 | |
3705 | last_byte_offset(u64 start, u64 len) | |
3706 | { | |
3707 | u64 end; | |
3708 | ||
3709 | BUG_ON(!len); | |
3710 | end = start + len; | |
3711 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3712 | } | |
3713 | ||
1da177e4 LT |
3714 | #define lockownerid_hashval(id) \ |
3715 | ((id) & LOCK_HASH_MASK) | |
3716 | ||
3717 | static inline unsigned int | |
3718 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3719 | struct xdr_netobj *ownername) | |
3720 | { | |
3721 | return (file_hashval(inode) + cl_id | |
3722 | + opaque_hashval(ownername->data, ownername->len)) | |
3723 | & LOCK_HASH_MASK; | |
3724 | } | |
3725 | ||
3726 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3727 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3728 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3729 | ||
e1ca12df BS |
3730 | static int |
3731 | same_stateid(stateid_t *id_one, stateid_t *id_two) | |
3732 | { | |
3733 | if (id_one->si_stateownerid != id_two->si_stateownerid) | |
3734 | return 0; | |
3735 | return id_one->si_fileid == id_two->si_fileid; | |
3736 | } | |
3737 | ||
fd39ca9a | 3738 | static struct nfs4_stateid * |
1da177e4 LT |
3739 | find_stateid(stateid_t *stid, int flags) |
3740 | { | |
9346eff0 | 3741 | struct nfs4_stateid *local; |
1da177e4 LT |
3742 | u32 st_id = stid->si_stateownerid; |
3743 | u32 f_id = stid->si_fileid; | |
3744 | unsigned int hashval; | |
3745 | ||
3746 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3747 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3748 | hashval = stateid_hashval(st_id, f_id); |
3749 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3750 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3751 | (local->st_stateid.si_fileid == f_id)) | |
3752 | return local; | |
3753 | } | |
3754 | } | |
9346eff0 KK |
3755 | |
3756 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3757 | hashval = stateid_hashval(st_id, f_id); |
3758 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3759 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3760 | (local->st_stateid.si_fileid == f_id)) | |
3761 | return local; | |
3762 | } | |
849823c5 | 3763 | } |
1da177e4 LT |
3764 | return NULL; |
3765 | } | |
3766 | ||
e1ca12df BS |
3767 | static struct nfs4_stateid * |
3768 | search_for_stateid(stateid_t *stid) | |
3769 | { | |
3770 | struct nfs4_stateid *local; | |
3771 | unsigned int hashval = stateid_hashval(stid->si_stateownerid, stid->si_fileid); | |
3772 | ||
3773 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3774 | if (same_stateid(&local->st_stateid, stid)) | |
3775 | return local; | |
3776 | } | |
3777 | ||
3778 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3779 | if (same_stateid(&local->st_stateid, stid)) | |
3780 | return local; | |
3781 | } | |
3782 | return NULL; | |
3783 | } | |
3784 | ||
3785 | static struct nfs4_delegation * | |
3786 | search_for_delegation(stateid_t *stid) | |
3787 | { | |
3788 | struct nfs4_file *fp; | |
3789 | struct nfs4_delegation *dp; | |
3790 | struct list_head *pos; | |
3791 | int i; | |
3792 | ||
3793 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3794 | list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { | |
3795 | list_for_each(pos, &fp->fi_delegations) { | |
3796 | dp = list_entry(pos, struct nfs4_delegation, dl_perfile); | |
3797 | if (same_stateid(&dp->dl_stateid, stid)) | |
3798 | return dp; | |
3799 | } | |
3800 | } | |
3801 | } | |
3802 | return NULL; | |
3803 | } | |
3804 | ||
1da177e4 LT |
3805 | static struct nfs4_delegation * |
3806 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3807 | { | |
13cd2184 N |
3808 | struct nfs4_file *fp; |
3809 | struct nfs4_delegation *dl; | |
1da177e4 | 3810 | |
8c10cbdb BH |
3811 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3812 | STATEID_VAL(stid)); | |
1da177e4 | 3813 | |
1da177e4 | 3814 | fp = find_file(ino); |
13cd2184 N |
3815 | if (!fp) |
3816 | return NULL; | |
3817 | dl = find_delegation_file(fp, stid); | |
3818 | put_nfs4_file(fp); | |
3819 | return dl; | |
1da177e4 LT |
3820 | } |
3821 | ||
3822 | /* | |
3823 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3824 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3825 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3826 | * locking, this prevents us from being completely protocol-compliant. The | |
3827 | * real solution to this problem is to start using unsigned file offsets in | |
3828 | * the VFS, but this is a very deep change! | |
3829 | */ | |
3830 | static inline void | |
3831 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3832 | { | |
3833 | if (lock->fl_start < 0) | |
3834 | lock->fl_start = OFFSET_MAX; | |
3835 | if (lock->fl_end < 0) | |
3836 | lock->fl_end = OFFSET_MAX; | |
3837 | } | |
3838 | ||
d5b9026a N |
3839 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3840 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3841 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3842 | }; |
1da177e4 LT |
3843 | |
3844 | static inline void | |
3845 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3846 | { | |
d5b9026a | 3847 | struct nfs4_stateowner *sop; |
1da177e4 | 3848 | |
d5b9026a N |
3849 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3850 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
1da177e4 LT |
3851 | kref_get(&sop->so_ref); |
3852 | deny->ld_sop = sop; | |
3853 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3854 | } else { |
3855 | deny->ld_sop = NULL; | |
3856 | deny->ld_clientid.cl_boot = 0; | |
3857 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3858 | } |
3859 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3860 | deny->ld_length = NFS4_MAX_UINT64; |
3861 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3862 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3863 | deny->ld_type = NFS4_READ_LT; | |
3864 | if (fl->fl_type != F_RDLCK) | |
3865 | deny->ld_type = NFS4_WRITE_LT; | |
3866 | } | |
3867 | ||
1da177e4 LT |
3868 | static struct nfs4_stateowner * |
3869 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3870 | struct xdr_netobj *owner) | |
3871 | { | |
3872 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3873 | struct nfs4_stateowner *op; | |
3874 | ||
3875 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3876 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3877 | return op; |
3878 | } | |
3879 | return NULL; | |
3880 | } | |
3881 | ||
3882 | /* | |
3883 | * Alloc a lock owner structure. | |
3884 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
25985edc | 3885 | * occurred. |
1da177e4 LT |
3886 | * |
3887 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3888 | */ |
3889 | ||
3890 | static struct nfs4_stateowner * | |
3891 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3892 | struct nfs4_stateowner *sop; | |
3893 | struct nfs4_replay *rp; | |
3894 | unsigned int idhashval; | |
3895 | ||
3896 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3897 | return NULL; | |
3898 | idhashval = lockownerid_hashval(current_ownerid); | |
3899 | INIT_LIST_HEAD(&sop->so_idhash); | |
3900 | INIT_LIST_HEAD(&sop->so_strhash); | |
3901 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3902 | INIT_LIST_HEAD(&sop->so_stateids); |
3903 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3904 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3905 | sop->so_time = 0; | |
3906 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3907 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3908 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3909 | sop->so_is_open_owner = 0; |
3910 | sop->so_id = current_ownerid++; | |
3911 | sop->so_client = clp; | |
b59e3c0e NB |
3912 | /* It is the openowner seqid that will be incremented in encode in the |
3913 | * case of new lockowners; so increment the lock seqid manually: */ | |
3914 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3915 | sop->so_confirmed = 1; |
3916 | rp = &sop->so_replay; | |
de1ae286 | 3917 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3918 | rp->rp_buflen = 0; |
3919 | rp->rp_buf = rp->rp_ibuf; | |
3920 | return sop; | |
3921 | } | |
3922 | ||
fd39ca9a | 3923 | static struct nfs4_stateid * |
1da177e4 LT |
3924 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3925 | { | |
3926 | struct nfs4_stateid *stp; | |
3927 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3928 | ||
5ac049ac N |
3929 | stp = nfs4_alloc_stateid(); |
3930 | if (stp == NULL) | |
1da177e4 LT |
3931 | goto out; |
3932 | INIT_LIST_HEAD(&stp->st_hash); | |
3933 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3934 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3935 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3936 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3937 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3938 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3939 | stp->st_stateowner = sop; |
13cd2184 | 3940 | get_nfs4_file(fp); |
1da177e4 | 3941 | stp->st_file = fp; |
e4e83ea4 | 3942 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
3943 | stp->st_stateid.si_stateownerid = sop->so_id; |
3944 | stp->st_stateid.si_fileid = fp->fi_id; | |
3945 | stp->st_stateid.si_generation = 0; | |
0997b173 | 3946 | stp->st_access_bmap = 0; |
1da177e4 | 3947 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3948 | stp->st_openstp = open_stp; |
1da177e4 LT |
3949 | |
3950 | out: | |
3951 | return stp; | |
3952 | } | |
3953 | ||
fd39ca9a | 3954 | static int |
1da177e4 LT |
3955 | check_lock_length(u64 offset, u64 length) |
3956 | { | |
87df4de8 | 3957 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3958 | LOFF_OVERFLOW(offset, length))); |
3959 | } | |
3960 | ||
0997b173 BF |
3961 | static void get_lock_access(struct nfs4_stateid *lock_stp, u32 access) |
3962 | { | |
3963 | struct nfs4_file *fp = lock_stp->st_file; | |
3964 | int oflag = nfs4_access_to_omode(access); | |
3965 | ||
3966 | if (test_bit(access, &lock_stp->st_access_bmap)) | |
3967 | return; | |
3968 | nfs4_file_get_access(fp, oflag); | |
3969 | __set_bit(access, &lock_stp->st_access_bmap); | |
3970 | } | |
3971 | ||
1da177e4 LT |
3972 | /* |
3973 | * LOCK operation | |
3974 | */ | |
b37ad28b | 3975 | __be32 |
ca364317 | 3976 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3977 | struct nfsd4_lock *lock) |
1da177e4 | 3978 | { |
3e9e3dbe | 3979 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3980 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 | 3981 | struct nfs4_stateid *lock_stp; |
7d947842 BF |
3982 | struct nfs4_file *fp; |
3983 | struct file *filp = NULL; | |
1da177e4 | 3984 | struct file_lock file_lock; |
8dc7c311 | 3985 | struct file_lock conflock; |
b37ad28b | 3986 | __be32 status = 0; |
1da177e4 | 3987 | unsigned int strhashval; |
b8dd7b9a | 3988 | int err; |
1da177e4 LT |
3989 | |
3990 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3991 | (long long) lock->lk_offset, | |
3992 | (long long) lock->lk_length); | |
3993 | ||
1da177e4 LT |
3994 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3995 | return nfserr_inval; | |
3996 | ||
ca364317 | 3997 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3998 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3999 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
4000 | return status; | |
4001 | } | |
4002 | ||
1da177e4 LT |
4003 | nfs4_lock_state(); |
4004 | ||
4005 | if (lock->lk_is_new) { | |
893f8770 N |
4006 | /* |
4007 | * Client indicates that this is a new lockowner. | |
4008 | * Use open owner and open stateid to create lock owner and | |
4009 | * lock stateid. | |
4010 | */ | |
1da177e4 | 4011 | struct nfs4_stateid *open_stp = NULL; |
1da177e4 LT |
4012 | |
4013 | status = nfserr_stale_clientid; | |
60adfc50 AA |
4014 | if (!nfsd4_has_session(cstate) && |
4015 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 4016 | goto out; |
1da177e4 | 4017 | |
1da177e4 | 4018 | /* validate and update open stateid and open seqid */ |
dd453dfd | 4019 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
4020 | lock->lk_new_open_seqid, |
4021 | &lock->lk_new_open_stateid, | |
f3362737 | 4022 | OPEN_STATE, |
3a65588a | 4023 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 4024 | lock); |
37515177 | 4025 | if (status) |
1da177e4 | 4026 | goto out; |
3a65588a | 4027 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
4028 | /* create lockowner and lock stateid */ |
4029 | fp = open_stp->st_file; | |
4030 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
4031 | open_sop->so_client->cl_clientid.cl_id, | |
4032 | &lock->v.new.owner); | |
3e9e3dbe N |
4033 | /* XXX: Do we need to check for duplicate stateowners on |
4034 | * the same file, or should they just be allowed (and | |
4035 | * create new stateids)? */ | |
1da177e4 | 4036 | status = nfserr_resource; |
b59e3c0e NB |
4037 | lock_sop = alloc_init_lock_stateowner(strhashval, |
4038 | open_sop->so_client, open_stp, lock); | |
4039 | if (lock_sop == NULL) | |
1da177e4 | 4040 | goto out; |
b59e3c0e | 4041 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 4042 | if (lock_stp == NULL) |
1da177e4 | 4043 | goto out; |
1da177e4 LT |
4044 | } else { |
4045 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 4046 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
4047 | lock->lk_old_lock_seqid, |
4048 | &lock->lk_old_lock_stateid, | |
f3362737 | 4049 | LOCK_STATE, |
3a65588a | 4050 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
4051 | if (status) |
4052 | goto out; | |
3a65588a | 4053 | lock_sop = lock->lk_replay_owner; |
7d947842 | 4054 | fp = lock_stp->st_file; |
1da177e4 | 4055 | } |
3a65588a | 4056 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 | 4057 | |
0dd395dc | 4058 | status = nfserr_grace; |
af558e33 | 4059 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
4060 | goto out; |
4061 | status = nfserr_no_grace; | |
af558e33 | 4062 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
4063 | goto out; |
4064 | ||
1da177e4 LT |
4065 | locks_init_lock(&file_lock); |
4066 | switch (lock->lk_type) { | |
4067 | case NFS4_READ_LT: | |
4068 | case NFS4_READW_LT: | |
0997b173 BF |
4069 | filp = find_readable_file(lock_stp->st_file); |
4070 | if (filp) | |
4071 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); | |
1da177e4 | 4072 | file_lock.fl_type = F_RDLCK; |
529d7b2a | 4073 | break; |
1da177e4 LT |
4074 | case NFS4_WRITE_LT: |
4075 | case NFS4_WRITEW_LT: | |
0997b173 BF |
4076 | filp = find_writeable_file(lock_stp->st_file); |
4077 | if (filp) | |
4078 | get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); | |
1da177e4 | 4079 | file_lock.fl_type = F_WRLCK; |
529d7b2a | 4080 | break; |
1da177e4 LT |
4081 | default: |
4082 | status = nfserr_inval; | |
4083 | goto out; | |
4084 | } | |
f9d7562f BF |
4085 | if (!filp) { |
4086 | status = nfserr_openmode; | |
4087 | goto out; | |
4088 | } | |
b59e3c0e | 4089 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
4090 | file_lock.fl_pid = current->tgid; |
4091 | file_lock.fl_file = filp; | |
4092 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4093 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4094 | |
4095 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 4096 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
4097 | nfs4_transform_lock_offset(&file_lock); |
4098 | ||
4099 | /* | |
4100 | * Try to lock the file in the VFS. | |
4101 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
4102 | */ | |
4103 | ||
529d7b2a | 4104 | err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); |
b8dd7b9a | 4105 | switch (-err) { |
1da177e4 LT |
4106 | case 0: /* success! */ |
4107 | update_stateid(&lock_stp->st_stateid); | |
4108 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
4109 | sizeof(stateid_t)); | |
b8dd7b9a | 4110 | status = 0; |
eb76b3fd AA |
4111 | break; |
4112 | case (EAGAIN): /* conflock holds conflicting lock */ | |
4113 | status = nfserr_denied; | |
4114 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
4115 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
4116 | break; | |
1da177e4 LT |
4117 | case (EDEADLK): |
4118 | status = nfserr_deadlock; | |
eb76b3fd | 4119 | break; |
1da177e4 | 4120 | default: |
fd85b817 | 4121 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
4122 | status = nfserr_resource; |
4123 | break; | |
1da177e4 | 4124 | } |
1da177e4 | 4125 | out: |
8a280510 | 4126 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 4127 | release_lockowner(lock_sop); |
3a65588a BF |
4128 | if (lock->lk_replay_owner) { |
4129 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 4130 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 4131 | } |
1da177e4 LT |
4132 | nfs4_unlock_state(); |
4133 | return status; | |
4134 | } | |
4135 | ||
55ef1274 BF |
4136 | /* |
4137 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
4138 | * so we do a temporary open here just to get an open file to pass to | |
4139 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
4140 | * inode operation.) | |
4141 | */ | |
4142 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
4143 | { | |
4144 | struct file *file; | |
4145 | int err; | |
4146 | ||
4147 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
4148 | if (err) | |
4149 | return err; | |
4150 | err = vfs_test_lock(file, lock); | |
4151 | nfsd_close(file); | |
4152 | return err; | |
4153 | } | |
4154 | ||
1da177e4 LT |
4155 | /* |
4156 | * LOCKT operation | |
4157 | */ | |
b37ad28b | 4158 | __be32 |
ca364317 BF |
4159 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
4160 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
4161 | { |
4162 | struct inode *inode; | |
1da177e4 | 4163 | struct file_lock file_lock; |
fd85b817 | 4164 | int error; |
b37ad28b | 4165 | __be32 status; |
1da177e4 | 4166 | |
af558e33 | 4167 | if (locks_in_grace()) |
1da177e4 LT |
4168 | return nfserr_grace; |
4169 | ||
4170 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
4171 | return nfserr_inval; | |
4172 | ||
4173 | lockt->lt_stateowner = NULL; | |
4174 | nfs4_lock_state(); | |
4175 | ||
4176 | status = nfserr_stale_clientid; | |
60adfc50 | 4177 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 4178 | goto out; |
1da177e4 | 4179 | |
75c096f7 | 4180 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 | 4181 | goto out; |
1da177e4 | 4182 | |
ca364317 | 4183 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
4184 | locks_init_lock(&file_lock); |
4185 | switch (lockt->lt_type) { | |
4186 | case NFS4_READ_LT: | |
4187 | case NFS4_READW_LT: | |
4188 | file_lock.fl_type = F_RDLCK; | |
4189 | break; | |
4190 | case NFS4_WRITE_LT: | |
4191 | case NFS4_WRITEW_LT: | |
4192 | file_lock.fl_type = F_WRLCK; | |
4193 | break; | |
4194 | default: | |
2fdada03 | 4195 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
4196 | status = nfserr_inval; |
4197 | goto out; | |
4198 | } | |
4199 | ||
4200 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
4201 | &lockt->lt_clientid, &lockt->lt_owner); | |
4202 | if (lockt->lt_stateowner) | |
4203 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
4204 | file_lock.fl_pid = current->tgid; | |
4205 | file_lock.fl_flags = FL_POSIX; | |
4206 | ||
4207 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 4208 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
4209 | |
4210 | nfs4_transform_lock_offset(&file_lock); | |
4211 | ||
1da177e4 | 4212 | status = nfs_ok; |
55ef1274 | 4213 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4214 | if (error) { |
4215 | status = nfserrno(error); | |
4216 | goto out; | |
4217 | } | |
9d6a8c5c | 4218 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4219 | status = nfserr_denied; |
9d6a8c5c | 4220 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4221 | } |
4222 | out: | |
4223 | nfs4_unlock_state(); | |
4224 | return status; | |
4225 | } | |
4226 | ||
b37ad28b | 4227 | __be32 |
ca364317 | 4228 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4229 | struct nfsd4_locku *locku) |
1da177e4 LT |
4230 | { |
4231 | struct nfs4_stateid *stp; | |
4232 | struct file *filp = NULL; | |
4233 | struct file_lock file_lock; | |
b37ad28b | 4234 | __be32 status; |
b8dd7b9a | 4235 | int err; |
1da177e4 LT |
4236 | |
4237 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4238 | (long long) locku->lu_offset, | |
4239 | (long long) locku->lu_length); | |
4240 | ||
4241 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4242 | return nfserr_inval; | |
4243 | ||
4244 | nfs4_lock_state(); | |
4245 | ||
dd453dfd | 4246 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
4247 | locku->lu_seqid, |
4248 | &locku->lu_stateid, | |
f3362737 | 4249 | LOCK_STATE, |
1da177e4 LT |
4250 | &locku->lu_stateowner, &stp, NULL))) |
4251 | goto out; | |
4252 | ||
f9d7562f BF |
4253 | filp = find_any_file(stp->st_file); |
4254 | if (!filp) { | |
4255 | status = nfserr_lock_range; | |
4256 | goto out; | |
4257 | } | |
1da177e4 LT |
4258 | BUG_ON(!filp); |
4259 | locks_init_lock(&file_lock); | |
4260 | file_lock.fl_type = F_UNLCK; | |
4261 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
4262 | file_lock.fl_pid = current->tgid; | |
4263 | file_lock.fl_file = filp; | |
4264 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4265 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4266 | file_lock.fl_start = locku->lu_offset; |
4267 | ||
87df4de8 | 4268 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4269 | nfs4_transform_lock_offset(&file_lock); |
4270 | ||
4271 | /* | |
4272 | * Try to unlock the file in the VFS. | |
4273 | */ | |
fd85b817 | 4274 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4275 | if (err) { |
fd85b817 | 4276 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4277 | goto out_nfserr; |
4278 | } | |
4279 | /* | |
4280 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4281 | */ | |
4282 | update_stateid(&stp->st_stateid); | |
4283 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
4284 | ||
4285 | out: | |
f2327d9a | 4286 | if (locku->lu_stateowner) { |
1da177e4 | 4287 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 4288 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 4289 | } |
1da177e4 LT |
4290 | nfs4_unlock_state(); |
4291 | return status; | |
4292 | ||
4293 | out_nfserr: | |
b8dd7b9a | 4294 | status = nfserrno(err); |
1da177e4 LT |
4295 | goto out; |
4296 | } | |
4297 | ||
4298 | /* | |
4299 | * returns | |
4300 | * 1: locks held by lockowner | |
4301 | * 0: no locks held by lockowner | |
4302 | */ | |
4303 | static int | |
f9d7562f | 4304 | check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner) |
1da177e4 LT |
4305 | { |
4306 | struct file_lock **flpp; | |
f9d7562f | 4307 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4308 | int status = 0; |
4309 | ||
b89f4321 | 4310 | lock_flocks(); |
1da177e4 | 4311 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4312 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4313 | status = 1; |
4314 | goto out; | |
796dadfd | 4315 | } |
1da177e4 LT |
4316 | } |
4317 | out: | |
b89f4321 | 4318 | unlock_flocks(); |
1da177e4 LT |
4319 | return status; |
4320 | } | |
4321 | ||
b37ad28b | 4322 | __be32 |
b591480b BF |
4323 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4324 | struct nfsd4_compound_state *cstate, | |
4325 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4326 | { |
4327 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
4328 | struct nfs4_stateowner *sop; |
4329 | struct nfs4_stateid *stp; | |
1da177e4 | 4330 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4331 | struct list_head matches; |
4332 | int i; | |
b37ad28b | 4333 | __be32 status; |
1da177e4 LT |
4334 | |
4335 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4336 | clid->cl_boot, clid->cl_id); | |
4337 | ||
4338 | /* XXX check for lease expiration */ | |
4339 | ||
4340 | status = nfserr_stale_clientid; | |
849823c5 | 4341 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4342 | return status; |
1da177e4 LT |
4343 | |
4344 | nfs4_lock_state(); | |
4345 | ||
3e9e3dbe N |
4346 | status = nfserr_locks_held; |
4347 | /* XXX: we're doing a linear search through all the lockowners. | |
4348 | * Yipes! For now we'll just hope clients aren't really using | |
4349 | * release_lockowner much, but eventually we have to fix these | |
4350 | * data structures. */ | |
4351 | INIT_LIST_HEAD(&matches); | |
4352 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4353 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 4354 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4355 | continue; |
4356 | list_for_each_entry(stp, &sop->so_stateids, | |
4357 | st_perstateowner) { | |
f9d7562f | 4358 | if (check_for_locks(stp->st_file, sop)) |
3e9e3dbe N |
4359 | goto out; |
4360 | /* Note: so_perclient unused for lockowners, | |
4361 | * so it's OK to fool with here. */ | |
4362 | list_add(&sop->so_perclient, &matches); | |
4363 | } | |
1da177e4 | 4364 | } |
3e9e3dbe N |
4365 | } |
4366 | /* Clients probably won't expect us to return with some (but not all) | |
4367 | * of the lockowner state released; so don't release any until all | |
4368 | * have been checked. */ | |
4369 | status = nfs_ok; | |
0fa822e4 N |
4370 | while (!list_empty(&matches)) { |
4371 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
4372 | so_perclient); | |
4373 | /* unhash_stateowner deletes so_perclient only | |
4374 | * for openowners. */ | |
4375 | list_del(&sop->so_perclient); | |
f044ff83 | 4376 | release_lockowner(sop); |
1da177e4 LT |
4377 | } |
4378 | out: | |
4379 | nfs4_unlock_state(); | |
4380 | return status; | |
4381 | } | |
4382 | ||
4383 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4384 | alloc_reclaim(void) |
1da177e4 | 4385 | { |
a55370a3 | 4386 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4387 | } |
4388 | ||
c7b9a459 | 4389 | int |
a1bcecd2 | 4390 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4391 | { |
4392 | unsigned int strhashval = clientstr_hashval(name); | |
4393 | struct nfs4_client *clp; | |
4394 | ||
e203d506 | 4395 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4396 | return clp ? 1 : 0; |
4397 | } | |
4398 | ||
1da177e4 LT |
4399 | /* |
4400 | * failure => all reset bets are off, nfserr_no_grace... | |
4401 | */ | |
190e4fbf N |
4402 | int |
4403 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4404 | { |
4405 | unsigned int strhashval; | |
4406 | struct nfs4_client_reclaim *crp = NULL; | |
4407 | ||
a55370a3 N |
4408 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4409 | crp = alloc_reclaim(); | |
1da177e4 LT |
4410 | if (!crp) |
4411 | return 0; | |
a55370a3 | 4412 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4413 | INIT_LIST_HEAD(&crp->cr_strhash); |
4414 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4415 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4416 | reclaim_str_hashtbl_size++; |
4417 | return 1; | |
4418 | } | |
4419 | ||
4420 | static void | |
4421 | nfs4_release_reclaim(void) | |
4422 | { | |
4423 | struct nfs4_client_reclaim *crp = NULL; | |
4424 | int i; | |
4425 | ||
1da177e4 LT |
4426 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4427 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4428 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4429 | struct nfs4_client_reclaim, cr_strhash); | |
4430 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4431 | kfree(crp); |
4432 | reclaim_str_hashtbl_size--; | |
4433 | } | |
4434 | } | |
4435 | BUG_ON(reclaim_str_hashtbl_size); | |
4436 | } | |
4437 | ||
4438 | /* | |
4439 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4440 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4441 | nfs4_find_reclaim_client(clientid_t *clid) |
4442 | { | |
4443 | unsigned int strhashval; | |
4444 | struct nfs4_client *clp; | |
4445 | struct nfs4_client_reclaim *crp = NULL; | |
4446 | ||
4447 | ||
4448 | /* find clientid in conf_id_hashtbl */ | |
4449 | clp = find_confirmed_client(clid); | |
4450 | if (clp == NULL) | |
4451 | return NULL; | |
4452 | ||
a55370a3 N |
4453 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4454 | clp->cl_name.len, clp->cl_name.data, | |
4455 | clp->cl_recdir); | |
1da177e4 LT |
4456 | |
4457 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4458 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4459 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4460 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4461 | return crp; |
4462 | } | |
4463 | } | |
4464 | return NULL; | |
4465 | } | |
4466 | ||
4467 | /* | |
4468 | * Called from OPEN. Look for clientid in reclaim list. | |
4469 | */ | |
b37ad28b | 4470 | __be32 |
1da177e4 LT |
4471 | nfs4_check_open_reclaim(clientid_t *clid) |
4472 | { | |
dfc83565 | 4473 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4474 | } |
4475 | ||
ac4d8ff2 | 4476 | /* initialization to perform at module load time: */ |
1da177e4 | 4477 | |
e8ff2a84 | 4478 | int |
ac4d8ff2 | 4479 | nfs4_state_init(void) |
1da177e4 | 4480 | { |
e8ff2a84 | 4481 | int i, status; |
1da177e4 | 4482 | |
e8ff2a84 BF |
4483 | status = nfsd4_init_slabs(); |
4484 | if (status) | |
4485 | return status; | |
1da177e4 LT |
4486 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4487 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4488 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4489 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4490 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4491 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4492 | } |
5282fd72 ME |
4493 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4494 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4495 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4496 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4497 | } | |
4498 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
4499 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
4500 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
4501 | } | |
4502 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
4503 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
4504 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
4505 | } | |
4506 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4507 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4508 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4509 | } | |
1da177e4 | 4510 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4511 | INIT_LIST_HEAD(&close_lru); |
4512 | INIT_LIST_HEAD(&client_lru); | |
4513 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4514 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4515 | return 0; |
ac4d8ff2 N |
4516 | } |
4517 | ||
190e4fbf N |
4518 | static void |
4519 | nfsd4_load_reboot_recovery_data(void) | |
4520 | { | |
4521 | int status; | |
4522 | ||
0964a3d3 | 4523 | nfs4_lock_state(); |
48483bf2 | 4524 | nfsd4_init_recdir(); |
190e4fbf | 4525 | status = nfsd4_recdir_load(); |
0964a3d3 | 4526 | nfs4_unlock_state(); |
190e4fbf N |
4527 | if (status) |
4528 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4529 | } | |
4530 | ||
c2f1a551 MS |
4531 | /* |
4532 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4533 | * client may quite reasonably hang on to a delegation as long as it has | |
4534 | * the inode cached. This becomes an obvious problem the first time a | |
4535 | * client's inode cache approaches the size of the server's total memory. | |
4536 | * | |
4537 | * For now we avoid this problem by imposing a hard limit on the number | |
4538 | * of delegations, which varies according to the server's memory size. | |
4539 | */ | |
4540 | static void | |
4541 | set_max_delegations(void) | |
4542 | { | |
4543 | /* | |
4544 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4545 | * estimates suggest that in the worst case (where every delegation | |
4546 | * is for a different inode), a delegation could take about 1.5K, | |
4547 | * giving a worst case usage of about 6% of memory. | |
4548 | */ | |
4549 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4550 | } | |
4551 | ||
ac4d8ff2 N |
4552 | /* initialization to perform when the nfsd service is started: */ |
4553 | ||
29ab23cc | 4554 | static int |
ac4d8ff2 N |
4555 | __nfs4_state_start(void) |
4556 | { | |
b5a1a81e BF |
4557 | int ret; |
4558 | ||
1da177e4 | 4559 | boot_time = get_seconds(); |
af558e33 | 4560 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4561 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4562 | nfsd4_grace); |
b5a1a81e BF |
4563 | ret = set_callback_cred(); |
4564 | if (ret) | |
4565 | return -ENOMEM; | |
58da282b | 4566 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4567 | if (laundry_wq == NULL) |
4568 | return -ENOMEM; | |
b5a1a81e BF |
4569 | ret = nfsd4_create_callback_queue(); |
4570 | if (ret) | |
4571 | goto out_free_laundry; | |
e46b498c | 4572 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4573 | set_max_delegations(); |
b5a1a81e BF |
4574 | return 0; |
4575 | out_free_laundry: | |
4576 | destroy_workqueue(laundry_wq); | |
4577 | return ret; | |
1da177e4 LT |
4578 | } |
4579 | ||
29ab23cc | 4580 | int |
76a3550e | 4581 | nfs4_state_start(void) |
1da177e4 | 4582 | { |
190e4fbf | 4583 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4584 | return __nfs4_state_start(); |
1da177e4 LT |
4585 | } |
4586 | ||
1da177e4 LT |
4587 | static void |
4588 | __nfs4_state_shutdown(void) | |
4589 | { | |
4590 | int i; | |
4591 | struct nfs4_client *clp = NULL; | |
4592 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4593 | struct list_head *pos, *next, reaplist; |
4594 | ||
1da177e4 LT |
4595 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4596 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4597 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4598 | expire_client(clp); | |
4599 | } | |
4600 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4601 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4602 | expire_client(clp); | |
4603 | } | |
4604 | } | |
4605 | INIT_LIST_HEAD(&reaplist); | |
4606 | spin_lock(&recall_lock); | |
4607 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4608 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4609 | list_move(&dp->dl_recall_lru, &reaplist); | |
4610 | } | |
4611 | spin_unlock(&recall_lock); | |
4612 | list_for_each_safe(pos, next, &reaplist) { | |
4613 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4614 | list_del_init(&dp->dl_recall_lru); | |
4615 | unhash_delegation(dp); | |
4616 | } | |
4617 | ||
190e4fbf | 4618 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4619 | } |
4620 | ||
4621 | void | |
4622 | nfs4_state_shutdown(void) | |
4623 | { | |
afe2c511 | 4624 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4625 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4626 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4627 | nfs4_lock_state(); |
4628 | nfs4_release_reclaim(); | |
4629 | __nfs4_state_shutdown(); | |
1da177e4 | 4630 | nfs4_unlock_state(); |
c3935e30 | 4631 | nfsd4_destroy_callback_queue(); |
1da177e4 | 4632 | } |