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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
b89f4321 | 36 | #include <linux/fs.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
0964a3d3 | 38 | #include <linux/namei.h> |
c2f1a551 | 39 | #include <linux/swap.h> |
68e76ad0 | 40 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 41 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 42 | #include "xdr4.h" |
0a3adade | 43 | #include "vfs.h" |
1da177e4 LT |
44 | |
45 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
46 | ||
47 | /* Globals */ | |
cf07d2ea | 48 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 49 | time_t nfsd4_grace = 90; |
fd39ca9a | 50 | static time_t boot_time; |
1da177e4 LT |
51 | static u32 current_ownerid = 1; |
52 | static u32 current_fileid = 1; | |
53 | static u32 current_delegid = 1; | |
fd39ca9a N |
54 | static stateid_t zerostateid; /* bits all 0 */ |
55 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 56 | static u64 current_sessionid = 1; |
fd39ca9a N |
57 | |
58 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
59 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 60 | |
1da177e4 | 61 | /* forward declarations */ |
fd39ca9a | 62 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 | 63 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
0964a3d3 N |
64 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
65 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 | 66 | |
8b671b80 BF |
67 | /* Locking: */ |
68 | ||
69 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 70 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 71 | |
8b671b80 BF |
72 | /* |
73 | * Currently used for the del_recall_lru and file hash table. In an | |
74 | * effort to decrease the scope of the client_mutex, this spinlock may | |
75 | * eventually cover more: | |
76 | */ | |
77 | static DEFINE_SPINLOCK(recall_lock); | |
78 | ||
e18b890b CL |
79 | static struct kmem_cache *stateowner_slab = NULL; |
80 | static struct kmem_cache *file_slab = NULL; | |
81 | static struct kmem_cache *stateid_slab = NULL; | |
82 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 83 | |
1da177e4 LT |
84 | void |
85 | nfs4_lock_state(void) | |
86 | { | |
353ab6e9 | 87 | mutex_lock(&client_mutex); |
1da177e4 LT |
88 | } |
89 | ||
90 | void | |
91 | nfs4_unlock_state(void) | |
92 | { | |
353ab6e9 | 93 | mutex_unlock(&client_mutex); |
1da177e4 LT |
94 | } |
95 | ||
96 | static inline u32 | |
97 | opaque_hashval(const void *ptr, int nbytes) | |
98 | { | |
99 | unsigned char *cptr = (unsigned char *) ptr; | |
100 | ||
101 | u32 x = 0; | |
102 | while (nbytes--) { | |
103 | x *= 37; | |
104 | x += *cptr++; | |
105 | } | |
106 | return x; | |
107 | } | |
108 | ||
1da177e4 LT |
109 | static struct list_head del_recall_lru; |
110 | ||
13cd2184 N |
111 | static inline void |
112 | put_nfs4_file(struct nfs4_file *fi) | |
113 | { | |
8b671b80 BF |
114 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
115 | list_del(&fi->fi_hash); | |
116 | spin_unlock(&recall_lock); | |
117 | iput(fi->fi_inode); | |
118 | kmem_cache_free(file_slab, fi); | |
119 | } | |
13cd2184 N |
120 | } |
121 | ||
122 | static inline void | |
123 | get_nfs4_file(struct nfs4_file *fi) | |
124 | { | |
8b671b80 | 125 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
126 | } |
127 | ||
ef0f3390 | 128 | static int num_delegations; |
c2f1a551 | 129 | unsigned int max_delegations; |
ef0f3390 N |
130 | |
131 | /* | |
132 | * Open owner state (share locks) | |
133 | */ | |
134 | ||
135 | /* hash tables for nfs4_stateowner */ | |
136 | #define OWNER_HASH_BITS 8 | |
137 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
138 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
139 | ||
140 | #define ownerid_hashval(id) \ | |
141 | ((id) & OWNER_HASH_MASK) | |
142 | #define ownerstr_hashval(clientid, ownername) \ | |
143 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
144 | ||
145 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
146 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
147 | ||
148 | /* hash table for nfs4_file */ | |
149 | #define FILE_HASH_BITS 8 | |
150 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
35079582 | 151 | |
ef0f3390 N |
152 | /* hash table for (open)nfs4_stateid */ |
153 | #define STATEID_HASH_BITS 10 | |
154 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
155 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
156 | ||
157 | #define file_hashval(x) \ | |
158 | hash_ptr(x, FILE_HASH_BITS) | |
159 | #define stateid_hashval(owner_id, file_id) \ | |
160 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
161 | ||
162 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
163 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
164 | ||
998db52c | 165 | static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
166 | { |
167 | BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); | |
168 | atomic_inc(&fp->fi_access[oflag]); | |
169 | } | |
170 | ||
998db52c BF |
171 | static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) |
172 | { | |
173 | if (oflag == O_RDWR) { | |
174 | __nfs4_file_get_access(fp, O_RDONLY); | |
175 | __nfs4_file_get_access(fp, O_WRONLY); | |
176 | } else | |
177 | __nfs4_file_get_access(fp, oflag); | |
178 | } | |
179 | ||
180 | static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) | |
f9d7562f BF |
181 | { |
182 | if (fp->fi_fds[oflag]) { | |
183 | fput(fp->fi_fds[oflag]); | |
184 | fp->fi_fds[oflag] = NULL; | |
185 | } | |
186 | } | |
187 | ||
998db52c | 188 | static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
f9d7562f BF |
189 | { |
190 | if (atomic_dec_and_test(&fp->fi_access[oflag])) { | |
191 | nfs4_file_put_fd(fp, O_RDWR); | |
192 | nfs4_file_put_fd(fp, oflag); | |
193 | } | |
194 | } | |
195 | ||
998db52c BF |
196 | static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) |
197 | { | |
198 | if (oflag == O_RDWR) { | |
199 | __nfs4_file_put_access(fp, O_RDONLY); | |
200 | __nfs4_file_put_access(fp, O_WRONLY); | |
201 | } else | |
202 | __nfs4_file_put_access(fp, oflag); | |
203 | } | |
204 | ||
1da177e4 LT |
205 | static struct nfs4_delegation * |
206 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
207 | { | |
208 | struct nfs4_delegation *dp; | |
209 | struct nfs4_file *fp = stp->st_file; | |
1da177e4 LT |
210 | |
211 | dprintk("NFSD alloc_init_deleg\n"); | |
c3e48080 BF |
212 | /* |
213 | * Major work on the lease subsystem (for example, to support | |
214 | * calbacks on stat) will be required before we can support | |
215 | * write delegations properly. | |
216 | */ | |
217 | if (type != NFS4_OPEN_DELEGATE_READ) | |
218 | return NULL; | |
47f9940c MS |
219 | if (fp->fi_had_conflict) |
220 | return NULL; | |
c2f1a551 | 221 | if (num_delegations > max_delegations) |
ef0f3390 | 222 | return NULL; |
5b2d21c1 N |
223 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
224 | if (dp == NULL) | |
1da177e4 | 225 | return dp; |
ef0f3390 | 226 | num_delegations++; |
ea1da636 N |
227 | INIT_LIST_HEAD(&dp->dl_perfile); |
228 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
229 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
230 | dp->dl_client = clp; | |
13cd2184 | 231 | get_nfs4_file(fp); |
1da177e4 | 232 | dp->dl_file = fp; |
1da177e4 | 233 | dp->dl_type = type; |
e4e83ea4 | 234 | dp->dl_stateid.si_boot = boot_time; |
1da177e4 LT |
235 | dp->dl_stateid.si_stateownerid = current_delegid++; |
236 | dp->dl_stateid.si_fileid = 0; | |
237 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 238 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
239 | dp->dl_time = 0; |
240 | atomic_set(&dp->dl_count, 1); | |
b5a1a81e | 241 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
242 | return dp; |
243 | } | |
244 | ||
245 | void | |
246 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
247 | { | |
248 | if (atomic_dec_and_test(&dp->dl_count)) { | |
249 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 250 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 251 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 252 | num_delegations--; |
1da177e4 LT |
253 | } |
254 | } | |
255 | ||
acfdf5c3 | 256 | static void nfs4_put_deleg_lease(struct nfs4_file *fp) |
1da177e4 | 257 | { |
acfdf5c3 BF |
258 | if (atomic_dec_and_test(&fp->fi_delegees)) { |
259 | vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); | |
260 | fp->fi_lease = NULL; | |
261 | fp->fi_deleg_file = NULL; | |
262 | } | |
1da177e4 LT |
263 | } |
264 | ||
265 | /* Called under the state lock. */ | |
266 | static void | |
267 | unhash_delegation(struct nfs4_delegation *dp) | |
268 | { | |
ea1da636 | 269 | list_del_init(&dp->dl_perclnt); |
1da177e4 | 270 | spin_lock(&recall_lock); |
5d926e8c | 271 | list_del_init(&dp->dl_perfile); |
1da177e4 LT |
272 | list_del_init(&dp->dl_recall_lru); |
273 | spin_unlock(&recall_lock); | |
acfdf5c3 | 274 | nfs4_put_deleg_lease(dp->dl_file); |
1da177e4 LT |
275 | nfs4_put_delegation(dp); |
276 | } | |
277 | ||
278 | /* | |
279 | * SETCLIENTID state | |
280 | */ | |
281 | ||
36acb66b | 282 | /* client_lock protects the client lru list and session hash table */ |
9089f1b4 BH |
283 | static DEFINE_SPINLOCK(client_lock); |
284 | ||
1da177e4 LT |
285 | /* Hash tables for nfs4_clientid state */ |
286 | #define CLIENT_HASH_BITS 4 | |
287 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
288 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
289 | ||
290 | #define clientid_hashval(id) \ | |
291 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
292 | #define clientstr_hashval(name) \ |
293 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
294 | /* |
295 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
296 | * used in reboot/reset lease grace period processing | |
297 | * | |
298 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
299 | * setclientid_confirmed info. | |
300 | * | |
301 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
302 | * setclientid info. | |
303 | * | |
304 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
305 | * for lease renewal. | |
306 | * | |
307 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
308 | * for last close replay. | |
309 | */ | |
310 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
311 | static int reclaim_str_hashtbl_size = 0; | |
312 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
313 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
314 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
315 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
316 | static struct list_head client_lru; | |
317 | static struct list_head close_lru; | |
318 | ||
2283963f BF |
319 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
320 | { | |
321 | list_del(&stp->st_hash); | |
322 | list_del(&stp->st_perfile); | |
323 | list_del(&stp->st_perstateowner); | |
324 | } | |
325 | ||
326 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
327 | { | |
328 | put_nfs4_file(stp->st_file); | |
329 | kmem_cache_free(stateid_slab, stp); | |
330 | } | |
331 | ||
332 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
333 | { | |
f9d7562f BF |
334 | struct file *file; |
335 | ||
2283963f | 336 | unhash_generic_stateid(stp); |
f9d7562f BF |
337 | file = find_any_file(stp->st_file); |
338 | if (file) | |
339 | locks_remove_posix(file, (fl_owner_t)stp->st_stateowner); | |
2283963f BF |
340 | free_generic_stateid(stp); |
341 | } | |
342 | ||
f044ff83 BF |
343 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
344 | { | |
345 | struct nfs4_stateid *stp; | |
346 | ||
347 | list_del(&sop->so_idhash); | |
348 | list_del(&sop->so_strhash); | |
349 | list_del(&sop->so_perstateid); | |
350 | while (!list_empty(&sop->so_stateids)) { | |
351 | stp = list_first_entry(&sop->so_stateids, | |
352 | struct nfs4_stateid, st_perstateowner); | |
353 | release_lock_stateid(stp); | |
354 | } | |
355 | } | |
356 | ||
357 | static void release_lockowner(struct nfs4_stateowner *sop) | |
358 | { | |
359 | unhash_lockowner(sop); | |
360 | nfs4_put_stateowner(sop); | |
361 | } | |
362 | ||
f1d110ca BF |
363 | static void |
364 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
365 | { | |
366 | struct nfs4_stateowner *lock_sop; | |
367 | ||
368 | while (!list_empty(&open_stp->st_lockowners)) { | |
369 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
370 | struct nfs4_stateowner, so_perstateid); | |
371 | /* list_del(&open_stp->st_lockowners); */ | |
372 | BUG_ON(lock_sop->so_is_open_owner); | |
f044ff83 | 373 | release_lockowner(lock_sop); |
f1d110ca BF |
374 | } |
375 | } | |
376 | ||
f9d7562f BF |
377 | /* |
378 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
379 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
380 | * only what share bits are currently in force, but also what | |
381 | * combinations of share bits previous opens have used. This allows us | |
382 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
383 | * return an error if the client attempt to downgrade to a combination | |
384 | * of share bits not explicable by closing some of its previous opens. | |
385 | * | |
386 | * XXX: This enforcement is actually incomplete, since we don't keep | |
387 | * track of access/deny bit combinations; so, e.g., we allow: | |
388 | * | |
389 | * OPEN allow read, deny write | |
390 | * OPEN allow both, deny none | |
391 | * DOWNGRADE allow read, deny none | |
392 | * | |
393 | * which we should reject. | |
394 | */ | |
395 | static void | |
396 | set_access(unsigned int *access, unsigned long bmap) { | |
397 | int i; | |
398 | ||
399 | *access = 0; | |
400 | for (i = 1; i < 4; i++) { | |
401 | if (test_bit(i, &bmap)) | |
402 | *access |= i; | |
403 | } | |
404 | } | |
405 | ||
406 | static void | |
407 | set_deny(unsigned int *deny, unsigned long bmap) { | |
408 | int i; | |
409 | ||
410 | *deny = 0; | |
411 | for (i = 0; i < 4; i++) { | |
412 | if (test_bit(i, &bmap)) | |
413 | *deny |= i ; | |
414 | } | |
415 | } | |
416 | ||
417 | static int | |
418 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
419 | unsigned int access, deny; | |
420 | ||
421 | set_access(&access, stp->st_access_bmap); | |
422 | set_deny(&deny, stp->st_deny_bmap); | |
423 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
424 | return 0; | |
425 | return 1; | |
426 | } | |
427 | ||
428 | static int nfs4_access_to_omode(u32 access) | |
429 | { | |
8f34a430 | 430 | switch (access & NFS4_SHARE_ACCESS_BOTH) { |
f9d7562f BF |
431 | case NFS4_SHARE_ACCESS_READ: |
432 | return O_RDONLY; | |
433 | case NFS4_SHARE_ACCESS_WRITE: | |
434 | return O_WRONLY; | |
435 | case NFS4_SHARE_ACCESS_BOTH: | |
436 | return O_RDWR; | |
437 | } | |
438 | BUG(); | |
439 | } | |
440 | ||
441 | static int nfs4_access_bmap_to_omode(struct nfs4_stateid *stp) | |
442 | { | |
443 | unsigned int access; | |
444 | ||
445 | set_access(&access, stp->st_access_bmap); | |
446 | return nfs4_access_to_omode(access); | |
447 | } | |
448 | ||
2283963f BF |
449 | static void release_open_stateid(struct nfs4_stateid *stp) |
450 | { | |
f9d7562f BF |
451 | int oflag = nfs4_access_bmap_to_omode(stp); |
452 | ||
2283963f BF |
453 | unhash_generic_stateid(stp); |
454 | release_stateid_lockowners(stp); | |
f9d7562f | 455 | nfs4_file_put_access(stp->st_file, oflag); |
2283963f BF |
456 | free_generic_stateid(stp); |
457 | } | |
458 | ||
f044ff83 | 459 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
460 | { |
461 | struct nfs4_stateid *stp; | |
462 | ||
463 | list_del(&sop->so_idhash); | |
464 | list_del(&sop->so_strhash); | |
f044ff83 BF |
465 | list_del(&sop->so_perclient); |
466 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 467 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
468 | stp = list_first_entry(&sop->so_stateids, |
469 | struct nfs4_stateid, st_perstateowner); | |
470 | release_open_stateid(stp); | |
f1d110ca BF |
471 | } |
472 | } | |
473 | ||
f044ff83 | 474 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 475 | { |
f044ff83 | 476 | unhash_openowner(sop); |
f1d110ca BF |
477 | list_del(&sop->so_close_lru); |
478 | nfs4_put_stateowner(sop); | |
479 | } | |
480 | ||
5282fd72 ME |
481 | #define SESSION_HASH_SIZE 512 |
482 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
483 | ||
484 | static inline int | |
485 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
486 | { | |
487 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
488 | ||
489 | return sid->sequence % SESSION_HASH_SIZE; | |
490 | } | |
491 | ||
492 | static inline void | |
493 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
494 | { | |
495 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
496 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
497 | } | |
498 | ||
ec6b5d7b AA |
499 | static void |
500 | gen_sessionid(struct nfsd4_session *ses) | |
501 | { | |
502 | struct nfs4_client *clp = ses->se_client; | |
503 | struct nfsd4_sessionid *sid; | |
504 | ||
505 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
506 | sid->clientid = clp->cl_clientid; | |
507 | sid->sequence = current_sessionid++; | |
508 | sid->reserved = 0; | |
509 | } | |
510 | ||
511 | /* | |
a649637c AA |
512 | * The protocol defines ca_maxresponssize_cached to include the size of |
513 | * the rpc header, but all we need to cache is the data starting after | |
514 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
515 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
516 | * value that is the number of bytes in our cache plus a few additional | |
517 | * bytes. In order to stay on the safe side, and not promise more than | |
518 | * we can cache, those additional bytes must be the minimum possible: 24 | |
519 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
520 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
521 | * for the SEQUENCE op response: | |
522 | */ | |
523 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
524 | ||
557ce264 AA |
525 | static void |
526 | free_session_slots(struct nfsd4_session *ses) | |
527 | { | |
528 | int i; | |
529 | ||
530 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
531 | kfree(ses->se_slots[i]); | |
532 | } | |
533 | ||
a649637c | 534 | /* |
efe0cb6d BF |
535 | * We don't actually need to cache the rpc and session headers, so we |
536 | * can allocate a little less for each slot: | |
537 | */ | |
538 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
539 | { | |
540 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
541 | } | |
542 | ||
5b6feee9 | 543 | static int nfsd4_sanitize_slot_size(u32 size) |
ec6b5d7b | 544 | { |
5b6feee9 BF |
545 | size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ |
546 | size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); | |
ec6b5d7b | 547 | |
5b6feee9 BF |
548 | return size; |
549 | } | |
ec6b5d7b | 550 | |
5b6feee9 BF |
551 | /* |
552 | * XXX: If we run out of reserved DRC memory we could (up to a point) | |
a649637c AA |
553 | * re-negotiate active sessions and reduce their slot usage to make |
554 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 555 | */ |
5b6feee9 | 556 | static int nfsd4_get_drc_mem(int slotsize, u32 num) |
ec6b5d7b | 557 | { |
5b6feee9 | 558 | int avail; |
ec6b5d7b | 559 | |
5b6feee9 | 560 | num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); |
5d77ddfb | 561 | |
5b6feee9 BF |
562 | spin_lock(&nfsd_drc_lock); |
563 | avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, | |
564 | nfsd_drc_max_mem - nfsd_drc_mem_used); | |
565 | num = min_t(int, num, avail / slotsize); | |
566 | nfsd_drc_mem_used += num * slotsize; | |
567 | spin_unlock(&nfsd_drc_lock); | |
ec6b5d7b | 568 | |
5b6feee9 BF |
569 | return num; |
570 | } | |
ec6b5d7b | 571 | |
5b6feee9 BF |
572 | static void nfsd4_put_drc_mem(int slotsize, int num) |
573 | { | |
4bd9b0f4 | 574 | spin_lock(&nfsd_drc_lock); |
5b6feee9 | 575 | nfsd_drc_mem_used -= slotsize * num; |
4bd9b0f4 | 576 | spin_unlock(&nfsd_drc_lock); |
5b6feee9 | 577 | } |
ec6b5d7b | 578 | |
5b6feee9 BF |
579 | static struct nfsd4_session *alloc_session(int slotsize, int numslots) |
580 | { | |
581 | struct nfsd4_session *new; | |
582 | int mem, i; | |
a649637c | 583 | |
5b6feee9 BF |
584 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) |
585 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
586 | mem = numslots * sizeof(struct nfsd4_slot *); | |
ec6b5d7b | 587 | |
5b6feee9 BF |
588 | new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); |
589 | if (!new) | |
590 | return NULL; | |
557ce264 | 591 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
5b6feee9 BF |
592 | for (i = 0; i < numslots; i++) { |
593 | mem = sizeof(struct nfsd4_slot) + slotsize; | |
594 | new->se_slots[i] = kzalloc(mem, GFP_KERNEL); | |
595 | if (!new->se_slots[i]) | |
557ce264 | 596 | goto out_free; |
557ce264 | 597 | } |
5b6feee9 BF |
598 | return new; |
599 | out_free: | |
600 | while (i--) | |
601 | kfree(new->se_slots[i]); | |
602 | kfree(new); | |
603 | return NULL; | |
ec6b5d7b AA |
604 | } |
605 | ||
5b6feee9 | 606 | static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) |
ec6b5d7b | 607 | { |
5b6feee9 | 608 | u32 maxrpc = nfsd_serv->sv_max_mesg; |
ec6b5d7b | 609 | |
5b6feee9 BF |
610 | new->maxreqs = numslots; |
611 | new->maxresp_cached = slotsize + NFSD_MIN_HDR_SEQ_SZ; | |
612 | new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); | |
613 | new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); | |
614 | new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); | |
615 | } | |
ec6b5d7b | 616 | |
19cf5c02 BF |
617 | static void free_conn(struct nfsd4_conn *c) |
618 | { | |
619 | svc_xprt_put(c->cn_xprt); | |
620 | kfree(c); | |
621 | } | |
ec6b5d7b | 622 | |
19cf5c02 BF |
623 | static void nfsd4_conn_lost(struct svc_xpt_user *u) |
624 | { | |
625 | struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); | |
626 | struct nfs4_client *clp = c->cn_session->se_client; | |
ec6b5d7b | 627 | |
19cf5c02 BF |
628 | spin_lock(&clp->cl_lock); |
629 | if (!list_empty(&c->cn_persession)) { | |
630 | list_del(&c->cn_persession); | |
631 | free_conn(c); | |
632 | } | |
633 | spin_unlock(&clp->cl_lock); | |
eea49806 | 634 | nfsd4_probe_callback(clp); |
19cf5c02 | 635 | } |
ec6b5d7b | 636 | |
d29c374c | 637 | static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) |
c7662518 | 638 | { |
c7662518 | 639 | struct nfsd4_conn *conn; |
ec6b5d7b | 640 | |
c7662518 BF |
641 | conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); |
642 | if (!conn) | |
db90681d | 643 | return NULL; |
c7662518 BF |
644 | svc_xprt_get(rqstp->rq_xprt); |
645 | conn->cn_xprt = rqstp->rq_xprt; | |
d29c374c | 646 | conn->cn_flags = flags; |
db90681d BF |
647 | INIT_LIST_HEAD(&conn->cn_xpt_user.list); |
648 | return conn; | |
649 | } | |
a649637c | 650 | |
328ead28 BF |
651 | static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
652 | { | |
653 | conn->cn_session = ses; | |
654 | list_add(&conn->cn_persession, &ses->se_conns); | |
ec6b5d7b AA |
655 | } |
656 | ||
db90681d | 657 | static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) |
557ce264 | 658 | { |
db90681d | 659 | struct nfs4_client *clp = ses->se_client; |
557ce264 | 660 | |
c7662518 | 661 | spin_lock(&clp->cl_lock); |
328ead28 | 662 | __nfsd4_hash_conn(conn, ses); |
c7662518 | 663 | spin_unlock(&clp->cl_lock); |
557ce264 AA |
664 | } |
665 | ||
21b75b01 | 666 | static int nfsd4_register_conn(struct nfsd4_conn *conn) |
efe0cb6d | 667 | { |
19cf5c02 | 668 | conn->cn_xpt_user.callback = nfsd4_conn_lost; |
21b75b01 | 669 | return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); |
efe0cb6d BF |
670 | } |
671 | ||
1d1bc8f2 | 672 | static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) |
ec6b5d7b | 673 | { |
db90681d | 674 | struct nfsd4_conn *conn; |
21b75b01 | 675 | int ret; |
ec6b5d7b | 676 | |
1d1bc8f2 | 677 | conn = alloc_conn(rqstp, dir); |
db90681d BF |
678 | if (!conn) |
679 | return nfserr_jukebox; | |
680 | nfsd4_hash_conn(conn, ses); | |
21b75b01 BF |
681 | ret = nfsd4_register_conn(conn); |
682 | if (ret) | |
683 | /* oops; xprt is already down: */ | |
684 | nfsd4_conn_lost(&conn->cn_xpt_user); | |
c7662518 BF |
685 | return nfs_ok; |
686 | } | |
ec6b5d7b | 687 | |
1d1bc8f2 BF |
688 | static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) |
689 | { | |
690 | u32 dir = NFS4_CDFC4_FORE; | |
691 | ||
692 | if (ses->se_flags & SESSION4_BACK_CHAN) | |
693 | dir |= NFS4_CDFC4_BACK; | |
694 | ||
695 | return nfsd4_new_conn(rqstp, ses, dir); | |
696 | } | |
697 | ||
698 | /* must be called under client_lock */ | |
19cf5c02 | 699 | static void nfsd4_del_conns(struct nfsd4_session *s) |
c7662518 | 700 | { |
19cf5c02 BF |
701 | struct nfs4_client *clp = s->se_client; |
702 | struct nfsd4_conn *c; | |
ec6b5d7b | 703 | |
19cf5c02 BF |
704 | spin_lock(&clp->cl_lock); |
705 | while (!list_empty(&s->se_conns)) { | |
706 | c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); | |
707 | list_del_init(&c->cn_persession); | |
708 | spin_unlock(&clp->cl_lock); | |
557ce264 | 709 | |
19cf5c02 BF |
710 | unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); |
711 | free_conn(c); | |
ec6b5d7b | 712 | |
19cf5c02 BF |
713 | spin_lock(&clp->cl_lock); |
714 | } | |
715 | spin_unlock(&clp->cl_lock); | |
c7662518 | 716 | } |
ec6b5d7b | 717 | |
c7662518 BF |
718 | void free_session(struct kref *kref) |
719 | { | |
720 | struct nfsd4_session *ses; | |
721 | int mem; | |
722 | ||
723 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
19cf5c02 | 724 | nfsd4_del_conns(ses); |
c7662518 BF |
725 | spin_lock(&nfsd_drc_lock); |
726 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); | |
727 | nfsd_drc_mem_used -= mem; | |
728 | spin_unlock(&nfsd_drc_lock); | |
729 | free_session_slots(ses); | |
730 | kfree(ses); | |
731 | } | |
732 | ||
ac7c46f2 | 733 | static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) |
5b6feee9 BF |
734 | { |
735 | struct nfsd4_session *new; | |
736 | struct nfsd4_channel_attrs *fchan = &cses->fore_channel; | |
737 | int numslots, slotsize; | |
c7662518 | 738 | int status; |
5b6feee9 BF |
739 | int idx; |
740 | ||
741 | /* | |
742 | * Note decreasing slot size below client's request may | |
743 | * make it difficult for client to function correctly, whereas | |
744 | * decreasing the number of slots will (just?) affect | |
745 | * performance. When short on memory we therefore prefer to | |
746 | * decrease number of slots instead of their size. | |
747 | */ | |
748 | slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); | |
749 | numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); | |
ced6dfe9 MJ |
750 | if (numslots < 1) |
751 | return NULL; | |
5b6feee9 BF |
752 | |
753 | new = alloc_session(slotsize, numslots); | |
754 | if (!new) { | |
755 | nfsd4_put_drc_mem(slotsize, fchan->maxreqs); | |
ac7c46f2 | 756 | return NULL; |
557ce264 | 757 | } |
5b6feee9 | 758 | init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); |
557ce264 | 759 | |
ec6b5d7b AA |
760 | new->se_client = clp; |
761 | gen_sessionid(new); | |
ec6b5d7b | 762 | |
c7662518 BF |
763 | INIT_LIST_HEAD(&new->se_conns); |
764 | ||
ac7c46f2 | 765 | new->se_cb_seq_nr = 1; |
ec6b5d7b | 766 | new->se_flags = cses->flags; |
8b5ce5cd | 767 | new->se_cb_prog = cses->callback_prog; |
ec6b5d7b | 768 | kref_init(&new->se_ref); |
5b6feee9 | 769 | idx = hash_sessionid(&new->se_sessionid); |
9089f1b4 | 770 | spin_lock(&client_lock); |
ec6b5d7b | 771 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); |
4c649378 | 772 | spin_lock(&clp->cl_lock); |
ec6b5d7b | 773 | list_add(&new->se_perclnt, &clp->cl_sessions); |
4c649378 | 774 | spin_unlock(&clp->cl_lock); |
9089f1b4 | 775 | spin_unlock(&client_lock); |
ec6b5d7b | 776 | |
1d1bc8f2 | 777 | status = nfsd4_new_conn_from_crses(rqstp, new); |
ac7c46f2 | 778 | /* whoops: benny points out, status is ignored! (err, or bogus) */ |
c7662518 BF |
779 | if (status) { |
780 | free_session(&new->se_ref); | |
ac7c46f2 | 781 | return NULL; |
c7662518 | 782 | } |
dcbeaa68 | 783 | if (cses->flags & SESSION4_BACK_CHAN) { |
edd76786 | 784 | struct sockaddr *sa = svc_addr(rqstp); |
dcbeaa68 BF |
785 | /* |
786 | * This is a little silly; with sessions there's no real | |
787 | * use for the callback address. Use the peer address | |
788 | * as a reasonable default for now, but consider fixing | |
789 | * the rpc client not to require an address in the | |
790 | * future: | |
791 | */ | |
edd76786 BF |
792 | rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); |
793 | clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
edd76786 | 794 | } |
dcbeaa68 | 795 | nfsd4_probe_callback(clp); |
ac7c46f2 | 796 | return new; |
ec6b5d7b AA |
797 | } |
798 | ||
9089f1b4 | 799 | /* caller must hold client_lock */ |
5282fd72 ME |
800 | static struct nfsd4_session * |
801 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
802 | { | |
803 | struct nfsd4_session *elem; | |
804 | int idx; | |
805 | ||
806 | dump_sessionid(__func__, sessionid); | |
807 | idx = hash_sessionid(sessionid); | |
5282fd72 ME |
808 | /* Search in the appropriate list */ |
809 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
5282fd72 ME |
810 | if (!memcmp(elem->se_sessionid.data, sessionid->data, |
811 | NFS4_MAX_SESSIONID_LEN)) { | |
812 | return elem; | |
813 | } | |
814 | } | |
815 | ||
816 | dprintk("%s: session not found\n", __func__); | |
817 | return NULL; | |
818 | } | |
819 | ||
9089f1b4 | 820 | /* caller must hold client_lock */ |
7116ed6b | 821 | static void |
5282fd72 | 822 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
823 | { |
824 | list_del(&ses->se_hash); | |
4c649378 | 825 | spin_lock(&ses->se_client->cl_lock); |
7116ed6b | 826 | list_del(&ses->se_perclnt); |
4c649378 | 827 | spin_unlock(&ses->se_client->cl_lock); |
5282fd72 ME |
828 | } |
829 | ||
36acb66b | 830 | /* must be called under the client_lock */ |
1da177e4 | 831 | static inline void |
36acb66b | 832 | renew_client_locked(struct nfs4_client *clp) |
1da177e4 | 833 | { |
07cd4909 BH |
834 | if (is_client_expired(clp)) { |
835 | dprintk("%s: client (clientid %08x/%08x) already expired\n", | |
836 | __func__, | |
837 | clp->cl_clientid.cl_boot, | |
838 | clp->cl_clientid.cl_id); | |
839 | return; | |
840 | } | |
841 | ||
1da177e4 LT |
842 | /* |
843 | * Move client to the end to the LRU list. | |
844 | */ | |
845 | dprintk("renewing client (clientid %08x/%08x)\n", | |
846 | clp->cl_clientid.cl_boot, | |
847 | clp->cl_clientid.cl_id); | |
848 | list_move_tail(&clp->cl_lru, &client_lru); | |
849 | clp->cl_time = get_seconds(); | |
850 | } | |
851 | ||
36acb66b BH |
852 | static inline void |
853 | renew_client(struct nfs4_client *clp) | |
854 | { | |
855 | spin_lock(&client_lock); | |
856 | renew_client_locked(clp); | |
857 | spin_unlock(&client_lock); | |
858 | } | |
859 | ||
1da177e4 LT |
860 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
861 | static int | |
862 | STALE_CLIENTID(clientid_t *clid) | |
863 | { | |
864 | if (clid->cl_boot == boot_time) | |
865 | return 0; | |
60adfc50 AA |
866 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
867 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
868 | return 1; |
869 | } | |
870 | ||
871 | /* | |
872 | * XXX Should we use a slab cache ? | |
873 | * This type of memory management is somewhat inefficient, but we use it | |
874 | * anyway since SETCLIENTID is not a common operation. | |
875 | */ | |
35bba9a3 | 876 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
877 | { |
878 | struct nfs4_client *clp; | |
879 | ||
35bba9a3 BF |
880 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
881 | if (clp == NULL) | |
882 | return NULL; | |
883 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
884 | if (clp->cl_name.data == NULL) { | |
885 | kfree(clp); | |
886 | return NULL; | |
1da177e4 | 887 | } |
35bba9a3 BF |
888 | memcpy(clp->cl_name.data, name.data, name.len); |
889 | clp->cl_name.len = name.len; | |
1da177e4 LT |
890 | return clp; |
891 | } | |
892 | ||
893 | static inline void | |
894 | free_client(struct nfs4_client *clp) | |
895 | { | |
792c95dd BF |
896 | while (!list_empty(&clp->cl_sessions)) { |
897 | struct nfsd4_session *ses; | |
898 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
899 | se_perclnt); | |
900 | list_del(&ses->se_perclnt); | |
901 | nfsd4_put_session(ses); | |
902 | } | |
1da177e4 LT |
903 | if (clp->cl_cred.cr_group_info) |
904 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 905 | kfree(clp->cl_principal); |
1da177e4 LT |
906 | kfree(clp->cl_name.data); |
907 | kfree(clp); | |
908 | } | |
909 | ||
d7682988 BH |
910 | void |
911 | release_session_client(struct nfsd4_session *session) | |
912 | { | |
913 | struct nfs4_client *clp = session->se_client; | |
914 | ||
915 | if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) | |
916 | return; | |
917 | if (is_client_expired(clp)) { | |
918 | free_client(clp); | |
919 | session->se_client = NULL; | |
920 | } else | |
921 | renew_client_locked(clp); | |
922 | spin_unlock(&client_lock); | |
d7682988 BH |
923 | } |
924 | ||
84d38ac9 BH |
925 | /* must be called under the client_lock */ |
926 | static inline void | |
927 | unhash_client_locked(struct nfs4_client *clp) | |
928 | { | |
792c95dd BF |
929 | struct nfsd4_session *ses; |
930 | ||
07cd4909 | 931 | mark_client_expired(clp); |
84d38ac9 | 932 | list_del(&clp->cl_lru); |
4c649378 | 933 | spin_lock(&clp->cl_lock); |
792c95dd BF |
934 | list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) |
935 | list_del_init(&ses->se_hash); | |
4c649378 | 936 | spin_unlock(&clp->cl_lock); |
84d38ac9 BH |
937 | } |
938 | ||
1da177e4 LT |
939 | static void |
940 | expire_client(struct nfs4_client *clp) | |
941 | { | |
942 | struct nfs4_stateowner *sop; | |
943 | struct nfs4_delegation *dp; | |
1da177e4 LT |
944 | struct list_head reaplist; |
945 | ||
1da177e4 LT |
946 | INIT_LIST_HEAD(&reaplist); |
947 | spin_lock(&recall_lock); | |
ea1da636 N |
948 | while (!list_empty(&clp->cl_delegations)) { |
949 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
ea1da636 | 950 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
951 | list_move(&dp->dl_recall_lru, &reaplist); |
952 | } | |
953 | spin_unlock(&recall_lock); | |
954 | while (!list_empty(&reaplist)) { | |
955 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
956 | list_del_init(&dp->dl_recall_lru); | |
957 | unhash_delegation(dp); | |
958 | } | |
ea1da636 N |
959 | while (!list_empty(&clp->cl_openowners)) { |
960 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 961 | release_openowner(sop); |
1da177e4 | 962 | } |
6ff8da08 | 963 | nfsd4_shutdown_callback(clp); |
84d38ac9 BH |
964 | if (clp->cl_cb_conn.cb_xprt) |
965 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
36acb66b BH |
966 | list_del(&clp->cl_idhash); |
967 | list_del(&clp->cl_strhash); | |
be1fdf6c | 968 | spin_lock(&client_lock); |
84d38ac9 | 969 | unhash_client_locked(clp); |
46583e25 BH |
970 | if (atomic_read(&clp->cl_refcount) == 0) |
971 | free_client(clp); | |
be1fdf6c | 972 | spin_unlock(&client_lock); |
1da177e4 LT |
973 | } |
974 | ||
35bba9a3 BF |
975 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
976 | { | |
977 | memcpy(target->cl_verifier.data, source->data, | |
978 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
979 | } |
980 | ||
35bba9a3 BF |
981 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
982 | { | |
1da177e4 LT |
983 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
984 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
985 | } | |
986 | ||
35bba9a3 BF |
987 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
988 | { | |
1da177e4 LT |
989 | target->cr_uid = source->cr_uid; |
990 | target->cr_gid = source->cr_gid; | |
991 | target->cr_group_info = source->cr_group_info; | |
992 | get_group_info(target->cr_group_info); | |
993 | } | |
994 | ||
35bba9a3 | 995 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 996 | { |
a55370a3 | 997 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
998 | } |
999 | ||
1000 | static int | |
599e0a22 BF |
1001 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
1002 | { | |
1003 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
1004 | } |
1005 | ||
1006 | static int | |
599e0a22 BF |
1007 | same_clid(clientid_t *cl1, clientid_t *cl2) |
1008 | { | |
1009 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
1010 | } |
1011 | ||
1012 | /* XXX what about NGROUP */ | |
1013 | static int | |
599e0a22 BF |
1014 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
1015 | { | |
1016 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
1017 | } |
1018 | ||
5ec7b46c BF |
1019 | static void gen_clid(struct nfs4_client *clp) |
1020 | { | |
1021 | static u32 current_clientid = 1; | |
1022 | ||
1da177e4 LT |
1023 | clp->cl_clientid.cl_boot = boot_time; |
1024 | clp->cl_clientid.cl_id = current_clientid++; | |
1025 | } | |
1026 | ||
deda2faa BF |
1027 | static void gen_confirm(struct nfs4_client *clp) |
1028 | { | |
1029 | static u32 i; | |
1030 | u32 *p; | |
1da177e4 | 1031 | |
1da177e4 | 1032 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
1033 | *p++ = get_seconds(); |
1034 | *p++ = i++; | |
1da177e4 LT |
1035 | } |
1036 | ||
b09333c4 RL |
1037 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
1038 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
1039 | { | |
1040 | struct nfs4_client *clp; | |
1041 | struct sockaddr *sa = svc_addr(rqstp); | |
1042 | char *princ; | |
1043 | ||
1044 | clp = alloc_client(name); | |
1045 | if (clp == NULL) | |
1046 | return NULL; | |
1047 | ||
792c95dd BF |
1048 | INIT_LIST_HEAD(&clp->cl_sessions); |
1049 | ||
b09333c4 RL |
1050 | princ = svc_gss_principal(rqstp); |
1051 | if (princ) { | |
1052 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1053 | if (clp->cl_principal == NULL) { | |
1054 | free_client(clp); | |
1055 | return NULL; | |
1056 | } | |
1057 | } | |
1058 | ||
1059 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
46583e25 | 1060 | atomic_set(&clp->cl_refcount, 0); |
77a3569d | 1061 | clp->cl_cb_state = NFSD4_CB_UNKNOWN; |
b09333c4 RL |
1062 | INIT_LIST_HEAD(&clp->cl_idhash); |
1063 | INIT_LIST_HEAD(&clp->cl_strhash); | |
1064 | INIT_LIST_HEAD(&clp->cl_openowners); | |
1065 | INIT_LIST_HEAD(&clp->cl_delegations); | |
b09333c4 | 1066 | INIT_LIST_HEAD(&clp->cl_lru); |
5ce8ba25 | 1067 | INIT_LIST_HEAD(&clp->cl_callbacks); |
6ff8da08 | 1068 | spin_lock_init(&clp->cl_lock); |
cee277d9 | 1069 | INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); |
07cd4909 | 1070 | clp->cl_time = get_seconds(); |
b09333c4 RL |
1071 | clear_bit(0, &clp->cl_cb_slot_busy); |
1072 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
1073 | copy_verf(clp, verf); | |
1074 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
1075 | clp->cl_flavor = rqstp->rq_flavor; | |
1076 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
1077 | gen_confirm(clp); | |
edd76786 | 1078 | clp->cl_cb_session = NULL; |
b09333c4 RL |
1079 | return clp; |
1080 | } | |
1081 | ||
35bba9a3 BF |
1082 | static int check_name(struct xdr_netobj name) |
1083 | { | |
1da177e4 LT |
1084 | if (name.len == 0) |
1085 | return 0; | |
1086 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 1087 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
1088 | return 0; |
1089 | } | |
1090 | return 1; | |
1091 | } | |
1092 | ||
fd39ca9a | 1093 | static void |
1da177e4 LT |
1094 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
1095 | { | |
1096 | unsigned int idhashval; | |
1097 | ||
1098 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
1099 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1100 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
36acb66b | 1101 | renew_client(clp); |
1da177e4 LT |
1102 | } |
1103 | ||
fd39ca9a | 1104 | static void |
1da177e4 LT |
1105 | move_to_confirmed(struct nfs4_client *clp) |
1106 | { | |
1107 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
1108 | unsigned int strhashval; | |
1109 | ||
1110 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
f116629d | 1111 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 1112 | strhashval = clientstr_hashval(clp->cl_recdir); |
328efbab | 1113 | list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
1da177e4 LT |
1114 | renew_client(clp); |
1115 | } | |
1116 | ||
1117 | static struct nfs4_client * | |
1118 | find_confirmed_client(clientid_t *clid) | |
1119 | { | |
1120 | struct nfs4_client *clp; | |
1121 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1122 | ||
1123 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1124 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1125 | return clp; |
1126 | } | |
1127 | return NULL; | |
1128 | } | |
1129 | ||
1130 | static struct nfs4_client * | |
1131 | find_unconfirmed_client(clientid_t *clid) | |
1132 | { | |
1133 | struct nfs4_client *clp; | |
1134 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
1135 | ||
1136 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 1137 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
1138 | return clp; |
1139 | } | |
1140 | return NULL; | |
1141 | } | |
1142 | ||
6e5f15c9 | 1143 | static bool clp_used_exchangeid(struct nfs4_client *clp) |
a1bcecd2 | 1144 | { |
6e5f15c9 | 1145 | return clp->cl_exchange_flags != 0; |
e203d506 | 1146 | } |
a1bcecd2 | 1147 | |
28ce6054 | 1148 | static struct nfs4_client * |
e203d506 | 1149 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1150 | { |
1151 | struct nfs4_client *clp; | |
1152 | ||
1153 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1154 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1155 | return clp; |
1156 | } | |
1157 | return NULL; | |
1158 | } | |
1159 | ||
1160 | static struct nfs4_client * | |
e203d506 | 1161 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
28ce6054 N |
1162 | { |
1163 | struct nfs4_client *clp; | |
1164 | ||
1165 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
e203d506 | 1166 | if (same_name(clp->cl_recdir, dname)) |
28ce6054 N |
1167 | return clp; |
1168 | } | |
1169 | return NULL; | |
1170 | } | |
1171 | ||
6f3d772f TU |
1172 | static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) |
1173 | { | |
1174 | switch (family) { | |
1175 | case AF_INET: | |
1176 | ((struct sockaddr_in *)sa)->sin_family = AF_INET; | |
1177 | ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; | |
1178 | return; | |
1179 | case AF_INET6: | |
1180 | ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; | |
1181 | ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; | |
1182 | return; | |
1183 | } | |
1184 | } | |
1185 | ||
fd39ca9a | 1186 | static void |
6f3d772f | 1187 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) |
1da177e4 | 1188 | { |
07263f1e | 1189 | struct nfs4_cb_conn *conn = &clp->cl_cb_conn; |
6f3d772f TU |
1190 | struct sockaddr *sa = svc_addr(rqstp); |
1191 | u32 scopeid = rpc_get_scope_id(sa); | |
7077ecba JL |
1192 | unsigned short expected_family; |
1193 | ||
1194 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
1195 | if (se->se_callback_netid_len == 3 && | |
1196 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
1197 | expected_family = AF_INET; | |
1198 | else if (se->se_callback_netid_len == 4 && | |
1199 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
1200 | expected_family = AF_INET6; | |
1201 | else | |
1da177e4 LT |
1202 | goto out_err; |
1203 | ||
07263f1e | 1204 | conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
aa9a4ec7 | 1205 | se->se_callback_addr_len, |
07263f1e BF |
1206 | (struct sockaddr *)&conn->cb_addr, |
1207 | sizeof(conn->cb_addr)); | |
aa9a4ec7 | 1208 | |
07263f1e | 1209 | if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) |
1da177e4 | 1210 | goto out_err; |
aa9a4ec7 | 1211 | |
07263f1e BF |
1212 | if (conn->cb_addr.ss_family == AF_INET6) |
1213 | ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; | |
fbf4665f | 1214 | |
07263f1e BF |
1215 | conn->cb_prog = se->se_callback_prog; |
1216 | conn->cb_ident = se->se_callback_ident; | |
6f3d772f | 1217 | rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); |
1da177e4 LT |
1218 | return; |
1219 | out_err: | |
07263f1e BF |
1220 | conn->cb_addr.ss_family = AF_UNSPEC; |
1221 | conn->cb_addrlen = 0; | |
849823c5 | 1222 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
1223 | "will not receive delegations\n", |
1224 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1225 | ||
1da177e4 LT |
1226 | return; |
1227 | } | |
1228 | ||
074fe897 | 1229 | /* |
557ce264 | 1230 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 1231 | */ |
074fe897 AA |
1232 | void |
1233 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 1234 | { |
557ce264 AA |
1235 | struct nfsd4_slot *slot = resp->cstate.slot; |
1236 | unsigned int base; | |
074fe897 | 1237 | |
557ce264 | 1238 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1239 | |
557ce264 AA |
1240 | slot->sl_opcnt = resp->opcnt; |
1241 | slot->sl_status = resp->cstate.status; | |
074fe897 | 1242 | |
bf864a31 | 1243 | if (nfsd4_not_cached(resp)) { |
557ce264 | 1244 | slot->sl_datalen = 0; |
bf864a31 | 1245 | return; |
074fe897 | 1246 | } |
557ce264 AA |
1247 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1248 | base = (char *)resp->cstate.datap - | |
1249 | (char *)resp->xbuf->head[0].iov_base; | |
1250 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1251 | slot->sl_datalen)) | |
1252 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1253 | return; | |
074fe897 AA |
1254 | } |
1255 | ||
1256 | /* | |
abfabf8c AA |
1257 | * Encode the replay sequence operation from the slot values. |
1258 | * If cachethis is FALSE encode the uncached rep error on the next | |
1259 | * operation which sets resp->p and increments resp->opcnt for | |
1260 | * nfs4svc_encode_compoundres. | |
074fe897 | 1261 | * |
074fe897 | 1262 | */ |
abfabf8c AA |
1263 | static __be32 |
1264 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1265 | struct nfsd4_compoundres *resp) | |
074fe897 | 1266 | { |
abfabf8c AA |
1267 | struct nfsd4_op *op; |
1268 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1269 | |
abfabf8c | 1270 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1271 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1272 | |
abfabf8c AA |
1273 | /* Encode the replayed sequence operation */ |
1274 | op = &args->ops[resp->opcnt - 1]; | |
1275 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1276 | |
abfabf8c | 1277 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1278 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1279 | op = &args->ops[resp->opcnt++]; |
1280 | op->status = nfserr_retry_uncached_rep; | |
1281 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1282 | } |
abfabf8c | 1283 | return op->status; |
074fe897 AA |
1284 | } |
1285 | ||
1286 | /* | |
557ce264 AA |
1287 | * The sequence operation is not cached because we can use the slot and |
1288 | * session values. | |
074fe897 AA |
1289 | */ |
1290 | __be32 | |
bf864a31 AA |
1291 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1292 | struct nfsd4_sequence *seq) | |
074fe897 | 1293 | { |
557ce264 | 1294 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1295 | __be32 status; |
1296 | ||
557ce264 | 1297 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1298 | |
abfabf8c AA |
1299 | /* Either returns 0 or nfserr_retry_uncached */ |
1300 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1301 | if (status == nfserr_retry_uncached_rep) | |
1302 | return status; | |
074fe897 | 1303 | |
557ce264 AA |
1304 | /* The sequence operation has been encoded, cstate->datap set. */ |
1305 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1306 | |
557ce264 AA |
1307 | resp->opcnt = slot->sl_opcnt; |
1308 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1309 | status = slot->sl_status; | |
074fe897 AA |
1310 | |
1311 | return status; | |
1312 | } | |
1313 | ||
0733d213 AA |
1314 | /* |
1315 | * Set the exchange_id flags returned by the server. | |
1316 | */ | |
1317 | static void | |
1318 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1319 | { | |
1320 | /* pNFS is not supported */ | |
1321 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1322 | ||
1323 | /* Referrals are supported, Migration is not. */ | |
1324 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1325 | ||
1326 | /* set the wire flags to return to client. */ | |
1327 | clid->flags = new->cl_exchange_flags; | |
1328 | } | |
1329 | ||
069b6ad4 AA |
1330 | __be32 |
1331 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1332 | struct nfsd4_compound_state *cstate, | |
1333 | struct nfsd4_exchange_id *exid) | |
1334 | { | |
0733d213 AA |
1335 | struct nfs4_client *unconf, *conf, *new; |
1336 | int status; | |
1337 | unsigned int strhashval; | |
1338 | char dname[HEXDIR_LEN]; | |
363168b4 | 1339 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1340 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1341 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1342 | |
363168b4 | 1343 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1344 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1345 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1346 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1347 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1348 | |
1349 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1350 | return nfserr_inval; | |
1351 | ||
1352 | /* Currently only support SP4_NONE */ | |
1353 | switch (exid->spa_how) { | |
1354 | case SP4_NONE: | |
1355 | break; | |
1356 | case SP4_SSV: | |
044bc1d4 | 1357 | return nfserr_serverfault; |
0733d213 AA |
1358 | default: |
1359 | BUG(); /* checked by xdr code */ | |
1360 | case SP4_MACH_CRED: | |
1361 | return nfserr_serverfault; /* no excuse :-/ */ | |
1362 | } | |
1363 | ||
1364 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1365 | ||
1366 | if (status) | |
1367 | goto error; | |
1368 | ||
1369 | strhashval = clientstr_hashval(dname); | |
1370 | ||
1371 | nfs4_lock_state(); | |
1372 | status = nfs_ok; | |
1373 | ||
e203d506 | 1374 | conf = find_confirmed_client_by_str(dname, strhashval); |
0733d213 | 1375 | if (conf) { |
e203d506 BF |
1376 | if (!clp_used_exchangeid(conf)) { |
1377 | status = nfserr_clid_inuse; /* XXX: ? */ | |
1378 | goto out; | |
1379 | } | |
0733d213 AA |
1380 | if (!same_verf(&verf, &conf->cl_verifier)) { |
1381 | /* 18.35.4 case 8 */ | |
1382 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1383 | status = nfserr_not_same; | |
1384 | goto out; | |
1385 | } | |
1386 | /* Client reboot: destroy old state */ | |
1387 | expire_client(conf); | |
1388 | goto out_new; | |
1389 | } | |
1390 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1391 | /* 18.35.4 case 9 */ | |
1392 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1393 | status = nfserr_perm; | |
1394 | goto out; | |
1395 | } | |
1396 | expire_client(conf); | |
1397 | goto out_new; | |
1398 | } | |
0733d213 AA |
1399 | /* |
1400 | * Set bit when the owner id and verifier map to an already | |
1401 | * confirmed client id (18.35.3). | |
1402 | */ | |
1403 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1404 | ||
1405 | /* | |
1406 | * Falling into 18.35.4 case 2, possible router replay. | |
1407 | * Leave confirmed record intact and return same result. | |
1408 | */ | |
1409 | copy_verf(conf, &verf); | |
1410 | new = conf; | |
1411 | goto out_copy; | |
6ddbbbfe MS |
1412 | } |
1413 | ||
1414 | /* 18.35.4 case 7 */ | |
1415 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1416 | status = nfserr_noent; | |
1417 | goto out; | |
0733d213 AA |
1418 | } |
1419 | ||
e203d506 | 1420 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
0733d213 AA |
1421 | if (unconf) { |
1422 | /* | |
1423 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1424 | * a new unconfirmed record should be generated regardless | |
1425 | * of whether any properties have changed. | |
1426 | */ | |
1427 | expire_client(unconf); | |
1428 | } | |
1429 | ||
1430 | out_new: | |
1431 | /* Normal case */ | |
b09333c4 | 1432 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1433 | if (new == NULL) { |
4731030d | 1434 | status = nfserr_jukebox; |
0733d213 AA |
1435 | goto out; |
1436 | } | |
1437 | ||
0733d213 | 1438 | gen_clid(new); |
0733d213 AA |
1439 | add_to_unconfirmed(new, strhashval); |
1440 | out_copy: | |
1441 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1442 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1443 | ||
38eb76a5 | 1444 | exid->seqid = 1; |
0733d213 AA |
1445 | nfsd4_set_ex_flags(new, exid); |
1446 | ||
1447 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1448 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1449 | status = nfs_ok; |
1450 | ||
1451 | out: | |
1452 | nfs4_unlock_state(); | |
1453 | error: | |
1454 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1455 | return status; | |
069b6ad4 AA |
1456 | } |
1457 | ||
b85d4c01 | 1458 | static int |
88e588d5 | 1459 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1460 | { |
88e588d5 AA |
1461 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1462 | slot_seqid); | |
b85d4c01 BH |
1463 | |
1464 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1465 | if (slot_inuse) { |
1466 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1467 | return nfserr_jukebox; |
1468 | else | |
1469 | return nfserr_seq_misordered; | |
1470 | } | |
1471 | /* Normal */ | |
88e588d5 | 1472 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1473 | return nfs_ok; |
1474 | /* Replay */ | |
88e588d5 | 1475 | if (seqid == slot_seqid) |
b85d4c01 BH |
1476 | return nfserr_replay_cache; |
1477 | /* Wraparound */ | |
88e588d5 | 1478 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1479 | return nfs_ok; |
1480 | /* Misordered replay or misordered new request */ | |
1481 | return nfserr_seq_misordered; | |
1482 | } | |
1483 | ||
49557cc7 AA |
1484 | /* |
1485 | * Cache the create session result into the create session single DRC | |
1486 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1487 | * Do this for solo or embedded create session operations. | |
1488 | */ | |
1489 | static void | |
1490 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1491 | struct nfsd4_clid_slot *slot, int nfserr) | |
1492 | { | |
1493 | slot->sl_status = nfserr; | |
1494 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1495 | } | |
1496 | ||
1497 | static __be32 | |
1498 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1499 | struct nfsd4_clid_slot *slot) | |
1500 | { | |
1501 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1502 | return slot->sl_status; | |
1503 | } | |
1504 | ||
069b6ad4 AA |
1505 | __be32 |
1506 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1507 | struct nfsd4_compound_state *cstate, | |
1508 | struct nfsd4_create_session *cr_ses) | |
1509 | { | |
363168b4 | 1510 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1511 | struct nfs4_client *conf, *unconf; |
ac7c46f2 | 1512 | struct nfsd4_session *new; |
49557cc7 | 1513 | struct nfsd4_clid_slot *cs_slot = NULL; |
86c3e16c | 1514 | bool confirm_me = false; |
ec6b5d7b AA |
1515 | int status = 0; |
1516 | ||
1517 | nfs4_lock_state(); | |
1518 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1519 | conf = find_confirmed_client(&cr_ses->clientid); | |
1520 | ||
1521 | if (conf) { | |
49557cc7 AA |
1522 | cs_slot = &conf->cl_cs_slot; |
1523 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1524 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1525 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1526 | cs_slot->sl_seqid); |
38eb76a5 | 1527 | /* Return the cached reply status */ |
49557cc7 | 1528 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1529 | goto out; |
49557cc7 | 1530 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1531 | status = nfserr_seq_misordered; |
1532 | dprintk("Sequence misordered!\n"); | |
1533 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1534 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1535 | goto out; |
1536 | } | |
ec6b5d7b AA |
1537 | } else if (unconf) { |
1538 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1539 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1540 | status = nfserr_clid_inuse; |
1541 | goto out; | |
1542 | } | |
1543 | ||
49557cc7 AA |
1544 | cs_slot = &unconf->cl_cs_slot; |
1545 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1546 | if (status) { |
1547 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1548 | status = nfserr_seq_misordered; |
cd5b8144 | 1549 | goto out; |
ec6b5d7b AA |
1550 | } |
1551 | ||
86c3e16c | 1552 | confirm_me = true; |
ec6b5d7b AA |
1553 | conf = unconf; |
1554 | } else { | |
1555 | status = nfserr_stale_clientid; | |
1556 | goto out; | |
1557 | } | |
1558 | ||
8323c3b2 BF |
1559 | /* |
1560 | * XXX: we should probably set this at creation time, and check | |
1561 | * for consistent minorversion use throughout: | |
1562 | */ | |
1563 | conf->cl_minorversion = 1; | |
408b79bc BF |
1564 | /* |
1565 | * We do not support RDMA or persistent sessions | |
1566 | */ | |
1567 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1568 | cr_ses->flags &= ~SESSION4_RDMA; | |
1569 | ||
ac7c46f2 BF |
1570 | status = nfserr_jukebox; |
1571 | new = alloc_init_session(rqstp, conf, cr_ses); | |
1572 | if (!new) | |
ec6b5d7b | 1573 | goto out; |
ac7c46f2 BF |
1574 | status = nfs_ok; |
1575 | memcpy(cr_ses->sessionid.data, new->se_sessionid.data, | |
ec6b5d7b | 1576 | NFS4_MAX_SESSIONID_LEN); |
12050657 MJ |
1577 | memcpy(&cr_ses->fore_channel, &new->se_fchannel, |
1578 | sizeof(struct nfsd4_channel_attrs)); | |
86c3e16c | 1579 | cs_slot->sl_seqid++; |
49557cc7 | 1580 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1581 | |
49557cc7 AA |
1582 | /* cache solo and embedded create sessions under the state lock */ |
1583 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
86c3e16c BF |
1584 | if (confirm_me) |
1585 | move_to_confirmed(conf); | |
ec6b5d7b AA |
1586 | out: |
1587 | nfs4_unlock_state(); | |
1588 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1589 | return status; | |
069b6ad4 AA |
1590 | } |
1591 | ||
57716355 BF |
1592 | static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) |
1593 | { | |
1594 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
1595 | struct nfsd4_compoundargs *argp = rqstp->rq_argp; | |
1596 | ||
1597 | return argp->opcnt == resp->opcnt; | |
1598 | } | |
1599 | ||
1d1bc8f2 BF |
1600 | static __be32 nfsd4_map_bcts_dir(u32 *dir) |
1601 | { | |
1602 | switch (*dir) { | |
1603 | case NFS4_CDFC4_FORE: | |
1604 | case NFS4_CDFC4_BACK: | |
1605 | return nfs_ok; | |
1606 | case NFS4_CDFC4_FORE_OR_BOTH: | |
1607 | case NFS4_CDFC4_BACK_OR_BOTH: | |
1608 | *dir = NFS4_CDFC4_BOTH; | |
1609 | return nfs_ok; | |
1610 | }; | |
1611 | return nfserr_inval; | |
1612 | } | |
1613 | ||
1614 | __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, | |
1615 | struct nfsd4_compound_state *cstate, | |
1616 | struct nfsd4_bind_conn_to_session *bcts) | |
1617 | { | |
1618 | __be32 status; | |
1619 | ||
1620 | if (!nfsd4_last_compound_op(rqstp)) | |
1621 | return nfserr_not_only_op; | |
1622 | spin_lock(&client_lock); | |
1623 | cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); | |
1624 | /* Sorta weird: we only need the refcnt'ing because new_conn acquires | |
1625 | * client_lock iself: */ | |
1626 | if (cstate->session) { | |
1627 | nfsd4_get_session(cstate->session); | |
1628 | atomic_inc(&cstate->session->se_client->cl_refcount); | |
1629 | } | |
1630 | spin_unlock(&client_lock); | |
1631 | if (!cstate->session) | |
1632 | return nfserr_badsession; | |
1633 | ||
1634 | status = nfsd4_map_bcts_dir(&bcts->dir); | |
1635 | nfsd4_new_conn(rqstp, cstate->session, bcts->dir); | |
1636 | return nfs_ok; | |
1637 | } | |
1638 | ||
5d4cec2f BF |
1639 | static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) |
1640 | { | |
1641 | if (!session) | |
1642 | return 0; | |
1643 | return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); | |
1644 | } | |
1645 | ||
069b6ad4 AA |
1646 | __be32 |
1647 | nfsd4_destroy_session(struct svc_rqst *r, | |
1648 | struct nfsd4_compound_state *cstate, | |
1649 | struct nfsd4_destroy_session *sessionid) | |
1650 | { | |
e10e0cfc BH |
1651 | struct nfsd4_session *ses; |
1652 | u32 status = nfserr_badsession; | |
1653 | ||
1654 | /* Notes: | |
1655 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1656 | * - Should we return nfserr_back_chan_busy if waiting for | |
1657 | * callbacks on to-be-destroyed session? | |
1658 | * - Do we need to clear any callback info from previous session? | |
1659 | */ | |
1660 | ||
5d4cec2f | 1661 | if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { |
57716355 BF |
1662 | if (!nfsd4_last_compound_op(r)) |
1663 | return nfserr_not_only_op; | |
1664 | } | |
e10e0cfc | 1665 | dump_sessionid(__func__, &sessionid->sessionid); |
9089f1b4 | 1666 | spin_lock(&client_lock); |
e10e0cfc BH |
1667 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); |
1668 | if (!ses) { | |
9089f1b4 | 1669 | spin_unlock(&client_lock); |
e10e0cfc BH |
1670 | goto out; |
1671 | } | |
1672 | ||
1673 | unhash_session(ses); | |
9089f1b4 | 1674 | spin_unlock(&client_lock); |
e10e0cfc | 1675 | |
ab707e15 | 1676 | nfs4_lock_state(); |
84f5f7cc | 1677 | nfsd4_probe_callback_sync(ses->se_client); |
ab707e15 | 1678 | nfs4_unlock_state(); |
19cf5c02 BF |
1679 | |
1680 | nfsd4_del_conns(ses); | |
1681 | ||
e10e0cfc BH |
1682 | nfsd4_put_session(ses); |
1683 | status = nfs_ok; | |
1684 | out: | |
1685 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1686 | return status; | |
069b6ad4 AA |
1687 | } |
1688 | ||
a663bdd8 | 1689 | static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) |
328ead28 BF |
1690 | { |
1691 | struct nfsd4_conn *c; | |
1692 | ||
1693 | list_for_each_entry(c, &s->se_conns, cn_persession) { | |
a663bdd8 | 1694 | if (c->cn_xprt == xpt) { |
328ead28 BF |
1695 | return c; |
1696 | } | |
1697 | } | |
1698 | return NULL; | |
1699 | } | |
1700 | ||
a663bdd8 | 1701 | static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) |
328ead28 BF |
1702 | { |
1703 | struct nfs4_client *clp = ses->se_client; | |
a663bdd8 | 1704 | struct nfsd4_conn *c; |
21b75b01 | 1705 | int ret; |
328ead28 BF |
1706 | |
1707 | spin_lock(&clp->cl_lock); | |
a663bdd8 | 1708 | c = __nfsd4_find_conn(new->cn_xprt, ses); |
328ead28 BF |
1709 | if (c) { |
1710 | spin_unlock(&clp->cl_lock); | |
1711 | free_conn(new); | |
1712 | return; | |
1713 | } | |
1714 | __nfsd4_hash_conn(new, ses); | |
1715 | spin_unlock(&clp->cl_lock); | |
21b75b01 BF |
1716 | ret = nfsd4_register_conn(new); |
1717 | if (ret) | |
1718 | /* oops; xprt is already down: */ | |
1719 | nfsd4_conn_lost(&new->cn_xpt_user); | |
328ead28 BF |
1720 | return; |
1721 | } | |
1722 | ||
069b6ad4 | 1723 | __be32 |
b85d4c01 | 1724 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1725 | struct nfsd4_compound_state *cstate, |
1726 | struct nfsd4_sequence *seq) | |
1727 | { | |
f9bb94c4 | 1728 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1729 | struct nfsd4_session *session; |
1730 | struct nfsd4_slot *slot; | |
a663bdd8 | 1731 | struct nfsd4_conn *conn; |
b85d4c01 BH |
1732 | int status; |
1733 | ||
f9bb94c4 AA |
1734 | if (resp->opcnt != 1) |
1735 | return nfserr_sequence_pos; | |
1736 | ||
a663bdd8 BF |
1737 | /* |
1738 | * Will be either used or freed by nfsd4_sequence_check_conn | |
1739 | * below. | |
1740 | */ | |
1741 | conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); | |
1742 | if (!conn) | |
1743 | return nfserr_jukebox; | |
1744 | ||
9089f1b4 | 1745 | spin_lock(&client_lock); |
b85d4c01 BH |
1746 | status = nfserr_badsession; |
1747 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1748 | if (!session) | |
1749 | goto out; | |
1750 | ||
1751 | status = nfserr_badslot; | |
6c18ba9f | 1752 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1753 | goto out; |
1754 | ||
557ce264 | 1755 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1756 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1757 | ||
a8dfdaeb AA |
1758 | /* We do not negotiate the number of slots yet, so set the |
1759 | * maxslots to the session maxreqs which is used to encode | |
1760 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1761 | seq->maxslots = session->se_fchannel.maxreqs; | |
1762 | ||
88e588d5 | 1763 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1764 | if (status == nfserr_replay_cache) { |
1765 | cstate->slot = slot; | |
1766 | cstate->session = session; | |
da3846a2 | 1767 | /* Return the cached reply status and set cstate->status |
557ce264 | 1768 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1769 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1770 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1771 | goto out; |
b85d4c01 BH |
1772 | } |
1773 | if (status) | |
1774 | goto out; | |
1775 | ||
a663bdd8 BF |
1776 | nfsd4_sequence_check_conn(conn, session); |
1777 | conn = NULL; | |
328ead28 | 1778 | |
b85d4c01 BH |
1779 | /* Success! bump slot seqid */ |
1780 | slot->sl_inuse = true; | |
1781 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1782 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1783 | |
1784 | cstate->slot = slot; | |
1785 | cstate->session = session; | |
1786 | ||
b85d4c01 | 1787 | out: |
26c0c75e | 1788 | /* Hold a session reference until done processing the compound. */ |
aaf84eb9 | 1789 | if (cstate->session) { |
0d7bb719 BF |
1790 | struct nfs4_client *clp = session->se_client; |
1791 | ||
36acb66b | 1792 | nfsd4_get_session(cstate->session); |
0d7bb719 BF |
1793 | atomic_inc(&clp->cl_refcount); |
1794 | if (clp->cl_cb_state == NFSD4_CB_DOWN) | |
1795 | seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; | |
aaf84eb9 | 1796 | } |
a663bdd8 | 1797 | kfree(conn); |
36acb66b | 1798 | spin_unlock(&client_lock); |
b85d4c01 BH |
1799 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1800 | return status; | |
069b6ad4 AA |
1801 | } |
1802 | ||
4dc6ec00 BF |
1803 | __be32 |
1804 | nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) | |
1805 | { | |
1806 | if (rc->rca_one_fs) { | |
1807 | if (!cstate->current_fh.fh_dentry) | |
1808 | return nfserr_nofilehandle; | |
1809 | /* | |
1810 | * We don't take advantage of the rca_one_fs case. | |
1811 | * That's OK, it's optional, we can safely ignore it. | |
1812 | */ | |
1813 | return nfs_ok; | |
1814 | } | |
1815 | nfs4_lock_state(); | |
1816 | if (is_client_expired(cstate->session->se_client)) { | |
1817 | nfs4_unlock_state(); | |
1818 | /* | |
1819 | * The following error isn't really legal. | |
1820 | * But we only get here if the client just explicitly | |
1821 | * destroyed the client. Surely it no longer cares what | |
1822 | * error it gets back on an operation for the dead | |
1823 | * client. | |
1824 | */ | |
1825 | return nfserr_stale_clientid; | |
1826 | } | |
1827 | nfsd4_create_clid_dir(cstate->session->se_client); | |
1828 | nfs4_unlock_state(); | |
1829 | return nfs_ok; | |
1830 | } | |
1831 | ||
b37ad28b | 1832 | __be32 |
b591480b BF |
1833 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1834 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1835 | { |
1da177e4 LT |
1836 | struct xdr_netobj clname = { |
1837 | .len = setclid->se_namelen, | |
1838 | .data = setclid->se_name, | |
1839 | }; | |
1840 | nfs4_verifier clverifier = setclid->se_verf; | |
1841 | unsigned int strhashval; | |
28ce6054 | 1842 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1843 | __be32 status; |
a55370a3 | 1844 | char dname[HEXDIR_LEN]; |
1da177e4 | 1845 | |
1da177e4 | 1846 | if (!check_name(clname)) |
73aea4ec | 1847 | return nfserr_inval; |
1da177e4 | 1848 | |
a55370a3 N |
1849 | status = nfs4_make_rec_clidname(dname, &clname); |
1850 | if (status) | |
73aea4ec | 1851 | return status; |
a55370a3 | 1852 | |
1da177e4 LT |
1853 | /* |
1854 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1855 | * We get here on a DRC miss. | |
1856 | */ | |
1857 | ||
a55370a3 | 1858 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1859 | |
1da177e4 | 1860 | nfs4_lock_state(); |
e203d506 | 1861 | conf = find_confirmed_client_by_str(dname, strhashval); |
28ce6054 | 1862 | if (conf) { |
a186e767 | 1863 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1864 | status = nfserr_clid_inuse; |
e203d506 BF |
1865 | if (clp_used_exchangeid(conf)) |
1866 | goto out; | |
026722c2 | 1867 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1868 | char addr_str[INET6_ADDRSTRLEN]; |
1869 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1870 | sizeof(addr_str)); | |
1871 | dprintk("NFSD: setclientid: string in use by client " | |
1872 | "at %s\n", addr_str); | |
1da177e4 LT |
1873 | goto out; |
1874 | } | |
1da177e4 | 1875 | } |
a186e767 BF |
1876 | /* |
1877 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1878 | * has a description of SETCLIENTID request processing consisting | |
1879 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1880 | */ | |
e203d506 | 1881 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
1da177e4 LT |
1882 | status = nfserr_resource; |
1883 | if (!conf) { | |
a186e767 BF |
1884 | /* |
1885 | * RFC 3530 14.2.33 CASE 4: | |
1886 | * placed first, because it is the normal case | |
1da177e4 LT |
1887 | */ |
1888 | if (unconf) | |
1889 | expire_client(unconf); | |
b09333c4 | 1890 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1891 | if (new == NULL) |
1da177e4 | 1892 | goto out; |
1da177e4 | 1893 | gen_clid(new); |
599e0a22 | 1894 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1895 | /* |
a186e767 BF |
1896 | * RFC 3530 14.2.33 CASE 1: |
1897 | * probable callback update | |
1da177e4 | 1898 | */ |
31f4a6c1 N |
1899 | if (unconf) { |
1900 | /* Note this is removing unconfirmed {*x***}, | |
1901 | * which is stronger than RFC recommended {vxc**}. | |
1902 | * This has the advantage that there is at most | |
1903 | * one {*x***} in either list at any time. | |
1904 | */ | |
1905 | expire_client(unconf); | |
1da177e4 | 1906 | } |
b09333c4 | 1907 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1908 | if (new == NULL) |
1da177e4 | 1909 | goto out; |
1da177e4 | 1910 | copy_clid(new, conf); |
1da177e4 LT |
1911 | } else if (!unconf) { |
1912 | /* | |
a186e767 BF |
1913 | * RFC 3530 14.2.33 CASE 2: |
1914 | * probable client reboot; state will be removed if | |
1915 | * confirmed. | |
1da177e4 | 1916 | */ |
b09333c4 | 1917 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1918 | if (new == NULL) |
1da177e4 | 1919 | goto out; |
1da177e4 | 1920 | gen_clid(new); |
49ba8781 | 1921 | } else { |
a186e767 BF |
1922 | /* |
1923 | * RFC 3530 14.2.33 CASE 3: | |
1924 | * probable client reboot; state will be removed if | |
1925 | * confirmed. | |
1da177e4 LT |
1926 | */ |
1927 | expire_client(unconf); | |
b09333c4 | 1928 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1929 | if (new == NULL) |
1da177e4 | 1930 | goto out; |
1da177e4 | 1931 | gen_clid(new); |
1da177e4 | 1932 | } |
8323c3b2 BF |
1933 | /* |
1934 | * XXX: we should probably set this at creation time, and check | |
1935 | * for consistent minorversion use throughout: | |
1936 | */ | |
1937 | new->cl_minorversion = 0; | |
6f3d772f | 1938 | gen_callback(new, setclid, rqstp); |
c175b83c | 1939 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
1940 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
1941 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
1942 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
1943 | status = nfs_ok; | |
1944 | out: | |
1945 | nfs4_unlock_state(); | |
1946 | return status; | |
1947 | } | |
1948 | ||
1949 | ||
1950 | /* | |
a186e767 BF |
1951 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
1952 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
1953 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 1954 | */ |
b37ad28b | 1955 | __be32 |
b591480b BF |
1956 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
1957 | struct nfsd4_compound_state *cstate, | |
1958 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 1959 | { |
363168b4 | 1960 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 1961 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
1962 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
1963 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 1964 | __be32 status; |
1da177e4 LT |
1965 | |
1966 | if (STALE_CLIENTID(clid)) | |
1967 | return nfserr_stale_clientid; | |
1968 | /* | |
1969 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1970 | * We get here on a DRC miss. | |
1971 | */ | |
1972 | ||
1973 | nfs4_lock_state(); | |
21ab45a4 N |
1974 | |
1975 | conf = find_confirmed_client(clid); | |
1976 | unconf = find_unconfirmed_client(clid); | |
1977 | ||
1978 | status = nfserr_clid_inuse; | |
363168b4 | 1979 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 1980 | goto out; |
363168b4 | 1981 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
1982 | goto out; |
1983 | ||
a186e767 BF |
1984 | /* |
1985 | * section 14.2.34 of RFC 3530 has a description of | |
1986 | * SETCLIENTID_CONFIRM request processing consisting | |
1987 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
1988 | */ | |
366e0c1d | 1989 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
1990 | /* |
1991 | * RFC 3530 14.2.34 CASE 1: | |
1992 | * callback update | |
1993 | */ | |
599e0a22 | 1994 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
1995 | status = nfserr_clid_inuse; |
1996 | else { | |
5a3c9d71 BF |
1997 | nfsd4_change_callback(conf, &unconf->cl_cb_conn); |
1998 | nfsd4_probe_callback(conf); | |
1a69c179 | 1999 | expire_client(unconf); |
1da177e4 | 2000 | status = nfs_ok; |
1a69c179 | 2001 | |
1da177e4 | 2002 | } |
f3aba4e5 | 2003 | } else if (conf && !unconf) { |
a186e767 BF |
2004 | /* |
2005 | * RFC 3530 14.2.34 CASE 2: | |
2006 | * probable retransmitted request; play it safe and | |
2007 | * do nothing. | |
7c79f737 | 2008 | */ |
599e0a22 | 2009 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 2010 | status = nfserr_clid_inuse; |
21ab45a4 | 2011 | else |
1da177e4 | 2012 | status = nfs_ok; |
7c79f737 | 2013 | } else if (!conf && unconf |
599e0a22 | 2014 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
2015 | /* |
2016 | * RFC 3530 14.2.34 CASE 3: | |
2017 | * Normal case; new or rebooted client: | |
7c79f737 | 2018 | */ |
599e0a22 | 2019 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
2020 | status = nfserr_clid_inuse; |
2021 | } else { | |
1a69c179 N |
2022 | unsigned int hash = |
2023 | clientstr_hashval(unconf->cl_recdir); | |
2024 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
e203d506 | 2025 | hash); |
1a69c179 | 2026 | if (conf) { |
c7b9a459 | 2027 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
2028 | expire_client(conf); |
2029 | } | |
1da177e4 | 2030 | move_to_confirmed(unconf); |
21ab45a4 | 2031 | conf = unconf; |
5a3c9d71 | 2032 | nfsd4_probe_callback(conf); |
1a69c179 | 2033 | status = nfs_ok; |
1da177e4 | 2034 | } |
599e0a22 BF |
2035 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
2036 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 2037 | &confirm)))) { |
a186e767 BF |
2038 | /* |
2039 | * RFC 3530 14.2.34 CASE 4: | |
2040 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 2041 | */ |
1da177e4 | 2042 | status = nfserr_stale_clientid; |
7c79f737 | 2043 | } else { |
08e8987c N |
2044 | /* check that we have hit one of the cases...*/ |
2045 | status = nfserr_clid_inuse; | |
2046 | } | |
1da177e4 | 2047 | out: |
1da177e4 LT |
2048 | nfs4_unlock_state(); |
2049 | return status; | |
2050 | } | |
2051 | ||
1da177e4 LT |
2052 | /* OPEN Share state helper functions */ |
2053 | static inline struct nfs4_file * | |
2054 | alloc_init_file(struct inode *ino) | |
2055 | { | |
2056 | struct nfs4_file *fp; | |
2057 | unsigned int hashval = file_hashval(ino); | |
2058 | ||
e60d4398 N |
2059 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
2060 | if (fp) { | |
8b671b80 | 2061 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 2062 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
2063 | INIT_LIST_HEAD(&fp->fi_stateids); |
2064 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
2065 | fp->fi_inode = igrab(ino); |
2066 | fp->fi_id = current_fileid++; | |
47f9940c | 2067 | fp->fi_had_conflict = false; |
acfdf5c3 | 2068 | fp->fi_lease = NULL; |
f9d7562f BF |
2069 | memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); |
2070 | memset(fp->fi_access, 0, sizeof(fp->fi_access)); | |
47cee541 PE |
2071 | spin_lock(&recall_lock); |
2072 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
2073 | spin_unlock(&recall_lock); | |
1da177e4 LT |
2074 | return fp; |
2075 | } | |
2076 | return NULL; | |
2077 | } | |
2078 | ||
e60d4398 | 2079 | static void |
e18b890b | 2080 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 2081 | { |
e60d4398 N |
2082 | if (*slab == NULL) |
2083 | return; | |
1a1d92c1 | 2084 | kmem_cache_destroy(*slab); |
e60d4398 | 2085 | *slab = NULL; |
1da177e4 LT |
2086 | } |
2087 | ||
e8ff2a84 | 2088 | void |
1da177e4 LT |
2089 | nfsd4_free_slabs(void) |
2090 | { | |
e60d4398 N |
2091 | nfsd4_free_slab(&stateowner_slab); |
2092 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 2093 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 2094 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 2095 | } |
1da177e4 | 2096 | |
e60d4398 N |
2097 | static int |
2098 | nfsd4_init_slabs(void) | |
2099 | { | |
2100 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 2101 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
2102 | if (stateowner_slab == NULL) |
2103 | goto out_nomem; | |
2104 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 2105 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
2106 | if (file_slab == NULL) |
2107 | goto out_nomem; | |
5ac049ac | 2108 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 2109 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
2110 | if (stateid_slab == NULL) |
2111 | goto out_nomem; | |
5b2d21c1 | 2112 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 2113 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
2114 | if (deleg_slab == NULL) |
2115 | goto out_nomem; | |
e60d4398 N |
2116 | return 0; |
2117 | out_nomem: | |
2118 | nfsd4_free_slabs(); | |
2119 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
2120 | return -ENOMEM; | |
1da177e4 LT |
2121 | } |
2122 | ||
2123 | void | |
2124 | nfs4_free_stateowner(struct kref *kref) | |
2125 | { | |
2126 | struct nfs4_stateowner *sop = | |
2127 | container_of(kref, struct nfs4_stateowner, so_ref); | |
2128 | kfree(sop->so_owner.data); | |
2129 | kmem_cache_free(stateowner_slab, sop); | |
2130 | } | |
2131 | ||
2132 | static inline struct nfs4_stateowner * | |
2133 | alloc_stateowner(struct xdr_netobj *owner) | |
2134 | { | |
2135 | struct nfs4_stateowner *sop; | |
2136 | ||
2137 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
2138 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
2139 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
2140 | sop->so_owner.len = owner->len; | |
2141 | kref_init(&sop->so_ref); | |
2142 | return sop; | |
2143 | } | |
2144 | kmem_cache_free(stateowner_slab, sop); | |
2145 | } | |
2146 | return NULL; | |
2147 | } | |
2148 | ||
2149 | static struct nfs4_stateowner * | |
2150 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
2151 | struct nfs4_stateowner *sop; | |
2152 | struct nfs4_replay *rp; | |
2153 | unsigned int idhashval; | |
2154 | ||
2155 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
2156 | return NULL; | |
2157 | idhashval = ownerid_hashval(current_ownerid); | |
2158 | INIT_LIST_HEAD(&sop->so_idhash); | |
2159 | INIT_LIST_HEAD(&sop->so_strhash); | |
2160 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2161 | INIT_LIST_HEAD(&sop->so_stateids); |
2162 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
2163 | INIT_LIST_HEAD(&sop->so_close_lru); |
2164 | sop->so_time = 0; | |
2165 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
2166 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2167 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
2168 | sop->so_is_open_owner = 1; |
2169 | sop->so_id = current_ownerid++; | |
2170 | sop->so_client = clp; | |
2171 | sop->so_seqid = open->op_seqid; | |
2172 | sop->so_confirmed = 0; | |
2173 | rp = &sop->so_replay; | |
de1ae286 | 2174 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2175 | rp->rp_buflen = 0; |
2176 | rp->rp_buf = rp->rp_ibuf; | |
2177 | return sop; | |
2178 | } | |
2179 | ||
1da177e4 LT |
2180 | static inline void |
2181 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
2182 | struct nfs4_stateowner *sop = open->op_stateowner; | |
2183 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2184 | ||
2185 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
2186 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2187 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
2188 | INIT_LIST_HEAD(&stp->st_perfile); |
2189 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 2190 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 2191 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 2192 | stp->st_stateowner = sop; |
13cd2184 | 2193 | get_nfs4_file(fp); |
1da177e4 | 2194 | stp->st_file = fp; |
e4e83ea4 | 2195 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
2196 | stp->st_stateid.si_stateownerid = sop->so_id; |
2197 | stp->st_stateid.si_fileid = fp->fi_id; | |
2198 | stp->st_stateid.si_generation = 0; | |
2199 | stp->st_access_bmap = 0; | |
2200 | stp->st_deny_bmap = 0; | |
84459a11 AA |
2201 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
2202 | &stp->st_access_bmap); | |
1da177e4 | 2203 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 2204 | stp->st_openstp = NULL; |
1da177e4 LT |
2205 | } |
2206 | ||
fd39ca9a | 2207 | static void |
1da177e4 LT |
2208 | move_to_close_lru(struct nfs4_stateowner *sop) |
2209 | { | |
2210 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
2211 | ||
358dd55a | 2212 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
2213 | sop->so_time = get_seconds(); |
2214 | } | |
2215 | ||
1da177e4 | 2216 | static int |
599e0a22 BF |
2217 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
2218 | clientid_t *clid) | |
2219 | { | |
2220 | return (sop->so_owner.len == owner->len) && | |
2221 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
2222 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
2223 | } |
2224 | ||
2225 | static struct nfs4_stateowner * | |
2226 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
2227 | { | |
2228 | struct nfs4_stateowner *so = NULL; | |
2229 | ||
2230 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 2231 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
2232 | return so; |
2233 | } | |
2234 | return NULL; | |
2235 | } | |
2236 | ||
2237 | /* search file_hashtbl[] for file */ | |
2238 | static struct nfs4_file * | |
2239 | find_file(struct inode *ino) | |
2240 | { | |
2241 | unsigned int hashval = file_hashval(ino); | |
2242 | struct nfs4_file *fp; | |
2243 | ||
8b671b80 | 2244 | spin_lock(&recall_lock); |
1da177e4 | 2245 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
2246 | if (fp->fi_inode == ino) { |
2247 | get_nfs4_file(fp); | |
8b671b80 | 2248 | spin_unlock(&recall_lock); |
1da177e4 | 2249 | return fp; |
13cd2184 | 2250 | } |
1da177e4 | 2251 | } |
8b671b80 | 2252 | spin_unlock(&recall_lock); |
1da177e4 LT |
2253 | return NULL; |
2254 | } | |
2255 | ||
d87a8ade | 2256 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 2257 | { |
d87a8ade | 2258 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 2259 | return 0; |
d87a8ade AA |
2260 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
2261 | return 0; | |
2262 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
2263 | if (minorversion && x) { | |
2264 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
2265 | return 0; | |
2266 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
2267 | return 0; | |
2268 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
2269 | } | |
2270 | if (x) | |
8838dc43 BF |
2271 | return 0; |
2272 | return 1; | |
ba5a6a19 BF |
2273 | } |
2274 | ||
8838dc43 | 2275 | static inline int deny_valid(u32 x) |
ba5a6a19 | 2276 | { |
8838dc43 BF |
2277 | /* Note: unlike access bits, deny bits may be zero. */ |
2278 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 2279 | } |
1da177e4 | 2280 | |
1da177e4 LT |
2281 | /* |
2282 | * Called to check deny when READ with all zero stateid or | |
2283 | * WRITE with all zero or all one stateid | |
2284 | */ | |
b37ad28b | 2285 | static __be32 |
1da177e4 LT |
2286 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2287 | { | |
2288 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2289 | struct nfs4_file *fp; | |
2290 | struct nfs4_stateid *stp; | |
b37ad28b | 2291 | __be32 ret; |
1da177e4 LT |
2292 | |
2293 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2294 | ||
2295 | fp = find_file(ino); | |
13cd2184 N |
2296 | if (!fp) |
2297 | return nfs_ok; | |
b700949b | 2298 | ret = nfserr_locked; |
1da177e4 | 2299 | /* Search for conflicting share reservations */ |
13cd2184 N |
2300 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2301 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2302 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2303 | goto out; | |
1da177e4 | 2304 | } |
13cd2184 N |
2305 | ret = nfs_ok; |
2306 | out: | |
2307 | put_nfs4_file(fp); | |
2308 | return ret; | |
1da177e4 LT |
2309 | } |
2310 | ||
2311 | static inline void | |
f9d7562f | 2312 | nfs4_file_downgrade(struct nfs4_file *fp, unsigned int share_access) |
1da177e4 | 2313 | { |
f9d7562f BF |
2314 | if (share_access & NFS4_SHARE_ACCESS_WRITE) |
2315 | nfs4_file_put_access(fp, O_WRONLY); | |
2316 | if (share_access & NFS4_SHARE_ACCESS_READ) | |
2317 | nfs4_file_put_access(fp, O_RDONLY); | |
1da177e4 LT |
2318 | } |
2319 | ||
6b57d9c8 | 2320 | static void nfsd_break_one_deleg(struct nfs4_delegation *dp) |
1da177e4 | 2321 | { |
1da177e4 LT |
2322 | /* We're assuming the state code never drops its reference |
2323 | * without first removing the lease. Since we're in this lease | |
2324 | * callback (and since the lease code is serialized by the kernel | |
2325 | * lock) we know the server hasn't removed the lease yet, we know | |
2326 | * it's safe to take a reference: */ | |
2327 | atomic_inc(&dp->dl_count); | |
2328 | ||
1da177e4 | 2329 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
1da177e4 | 2330 | |
460781b5 | 2331 | /* only place dl_time is set. protected by lock_flocks*/ |
1da177e4 LT |
2332 | dp->dl_time = get_seconds(); |
2333 | ||
6b57d9c8 BF |
2334 | nfsd4_cb_recall(dp); |
2335 | } | |
2336 | ||
acfdf5c3 | 2337 | /* Called from break_lease() with lock_flocks() held. */ |
6b57d9c8 BF |
2338 | static void nfsd_break_deleg_cb(struct file_lock *fl) |
2339 | { | |
acfdf5c3 BF |
2340 | struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; |
2341 | struct nfs4_delegation *dp; | |
6b57d9c8 | 2342 | |
acfdf5c3 BF |
2343 | BUG_ON(!fp); |
2344 | /* We assume break_lease is only called once per lease: */ | |
2345 | BUG_ON(fp->fi_had_conflict); | |
0272e1fd BF |
2346 | /* |
2347 | * We don't want the locks code to timeout the lease for us; | |
acfdf5c3 | 2348 | * we'll remove it ourself if a delegation isn't returned |
6b57d9c8 | 2349 | * in time: |
0272e1fd BF |
2350 | */ |
2351 | fl->fl_break_time = 0; | |
1da177e4 | 2352 | |
5d926e8c | 2353 | spin_lock(&recall_lock); |
acfdf5c3 BF |
2354 | fp->fi_had_conflict = true; |
2355 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) | |
2356 | nfsd_break_one_deleg(dp); | |
5d926e8c | 2357 | spin_unlock(&recall_lock); |
1da177e4 LT |
2358 | } |
2359 | ||
1da177e4 LT |
2360 | static |
2361 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2362 | { | |
2363 | if (arg & F_UNLCK) | |
2364 | return lease_modify(onlist, arg); | |
2365 | else | |
2366 | return -EAGAIN; | |
2367 | } | |
2368 | ||
7b021967 | 2369 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 | 2370 | .fl_break = nfsd_break_deleg_cb, |
1da177e4 LT |
2371 | .fl_change = nfsd_change_deleg_cb, |
2372 | }; | |
2373 | ||
2374 | ||
b37ad28b | 2375 | __be32 |
6668958f AA |
2376 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2377 | struct nfsd4_open *open) | |
1da177e4 | 2378 | { |
1da177e4 LT |
2379 | clientid_t *clientid = &open->op_clientid; |
2380 | struct nfs4_client *clp = NULL; | |
2381 | unsigned int strhashval; | |
2382 | struct nfs4_stateowner *sop = NULL; | |
2383 | ||
1da177e4 | 2384 | if (!check_name(open->op_owner)) |
0f442aa2 | 2385 | return nfserr_inval; |
1da177e4 LT |
2386 | |
2387 | if (STALE_CLIENTID(&open->op_clientid)) | |
2388 | return nfserr_stale_clientid; | |
2389 | ||
2390 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2391 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2392 | open->op_stateowner = sop; |
2393 | if (!sop) { | |
2394 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2395 | clp = find_confirmed_client(clientid); |
2396 | if (clp == NULL) | |
0f442aa2 BF |
2397 | return nfserr_expired; |
2398 | goto renew; | |
1da177e4 | 2399 | } |
6668958f AA |
2400 | /* When sessions are used, skip open sequenceid processing */ |
2401 | if (nfsd4_has_session(cstate)) | |
2402 | goto renew; | |
0f442aa2 BF |
2403 | if (!sop->so_confirmed) { |
2404 | /* Replace unconfirmed owners without checking for replay. */ | |
2405 | clp = sop->so_client; | |
f044ff83 | 2406 | release_openowner(sop); |
0f442aa2 BF |
2407 | open->op_stateowner = NULL; |
2408 | goto renew; | |
2409 | } | |
2410 | if (open->op_seqid == sop->so_seqid - 1) { | |
2411 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2412 | return nfserr_replay_me; |
0f442aa2 BF |
2413 | /* The original OPEN failed so spectacularly |
2414 | * that we don't even have replay data saved! | |
2415 | * Therefore, we have no choice but to continue | |
2416 | * processing this OPEN; presumably, we'll | |
2417 | * fail again for the same reason. | |
2418 | */ | |
2419 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2420 | goto renew; | |
2421 | } | |
2422 | if (open->op_seqid != sop->so_seqid) | |
2423 | return nfserr_bad_seqid; | |
1da177e4 | 2424 | renew: |
0f442aa2 BF |
2425 | if (open->op_stateowner == NULL) { |
2426 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2427 | if (sop == NULL) | |
2428 | return nfserr_resource; | |
2429 | open->op_stateowner = sop; | |
2430 | } | |
2431 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2432 | renew_client(sop->so_client); |
0f442aa2 | 2433 | return nfs_ok; |
1da177e4 LT |
2434 | } |
2435 | ||
b37ad28b | 2436 | static inline __be32 |
4a6e43e6 N |
2437 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2438 | { | |
2439 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2440 | return nfserr_openmode; | |
2441 | else | |
2442 | return nfs_ok; | |
2443 | } | |
2444 | ||
52f4fb43 N |
2445 | static struct nfs4_delegation * |
2446 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2447 | { | |
acfdf5c3 | 2448 | struct nfs4_delegation *dp = NULL; |
52f4fb43 | 2449 | |
acfdf5c3 | 2450 | spin_lock(&recall_lock); |
ea1da636 | 2451 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 | 2452 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
acfdf5c3 | 2453 | break; |
52f4fb43 | 2454 | } |
acfdf5c3 BF |
2455 | spin_unlock(&recall_lock); |
2456 | return dp; | |
52f4fb43 N |
2457 | } |
2458 | ||
24a0111e BF |
2459 | int share_access_to_flags(u32 share_access) |
2460 | { | |
2461 | share_access &= ~NFS4_SHARE_WANT_MASK; | |
2462 | ||
2463 | return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; | |
2464 | } | |
2465 | ||
b37ad28b | 2466 | static __be32 |
567d9829 N |
2467 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2468 | struct nfs4_delegation **dp) | |
2469 | { | |
2470 | int flags; | |
b37ad28b | 2471 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2472 | |
2473 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2474 | if (*dp == NULL) | |
c44c5eeb | 2475 | goto out; |
24a0111e | 2476 | flags = share_access_to_flags(open->op_share_access); |
567d9829 N |
2477 | status = nfs4_check_delegmode(*dp, flags); |
2478 | if (status) | |
2479 | *dp = NULL; | |
c44c5eeb N |
2480 | out: |
2481 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2482 | return nfs_ok; | |
2483 | if (status) | |
2484 | return status; | |
2485 | open->op_stateowner->so_confirmed = 1; | |
2486 | return nfs_ok; | |
567d9829 N |
2487 | } |
2488 | ||
b37ad28b | 2489 | static __be32 |
1da177e4 LT |
2490 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2491 | { | |
2492 | struct nfs4_stateid *local; | |
b37ad28b | 2493 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2494 | struct nfs4_stateowner *sop = open->op_stateowner; |
2495 | ||
8beefa24 | 2496 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2497 | /* ignore lock owners */ |
2498 | if (local->st_stateowner->so_is_open_owner == 0) | |
2499 | continue; | |
2500 | /* remember if we have seen this open owner */ | |
2501 | if (local->st_stateowner == sop) | |
2502 | *stpp = local; | |
2503 | /* check for conflicting share reservations */ | |
2504 | if (!test_share(local, open)) | |
2505 | goto out; | |
2506 | } | |
2507 | status = 0; | |
2508 | out: | |
2509 | return status; | |
2510 | } | |
2511 | ||
5ac049ac N |
2512 | static inline struct nfs4_stateid * |
2513 | nfs4_alloc_stateid(void) | |
2514 | { | |
2515 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2516 | } | |
2517 | ||
21fb4016 BF |
2518 | static inline int nfs4_access_to_access(u32 nfs4_access) |
2519 | { | |
2520 | int flags = 0; | |
2521 | ||
2522 | if (nfs4_access & NFS4_SHARE_ACCESS_READ) | |
2523 | flags |= NFSD_MAY_READ; | |
2524 | if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) | |
2525 | flags |= NFSD_MAY_WRITE; | |
2526 | return flags; | |
2527 | } | |
2528 | ||
f9d7562f BF |
2529 | static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file |
2530 | *fp, struct svc_fh *cur_fh, u32 nfs4_access) | |
2531 | { | |
2532 | __be32 status; | |
2533 | int oflag = nfs4_access_to_omode(nfs4_access); | |
2534 | int access = nfs4_access_to_access(nfs4_access); | |
2535 | ||
2536 | if (!fp->fi_fds[oflag]) { | |
2537 | status = nfsd_open(rqstp, cur_fh, S_IFREG, access, | |
2538 | &fp->fi_fds[oflag]); | |
f9d7562f BF |
2539 | if (status) |
2540 | return status; | |
2541 | } | |
2542 | nfs4_file_get_access(fp, oflag); | |
2543 | ||
2544 | return nfs_ok; | |
2545 | } | |
2546 | ||
b37ad28b | 2547 | static __be32 |
1da177e4 | 2548 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
f9d7562f BF |
2549 | struct nfs4_file *fp, struct svc_fh *cur_fh, |
2550 | struct nfsd4_open *open) | |
1da177e4 LT |
2551 | { |
2552 | struct nfs4_stateid *stp; | |
f9d7562f | 2553 | __be32 status; |
1da177e4 | 2554 | |
5ac049ac | 2555 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2556 | if (stp == NULL) |
2557 | return nfserr_resource; | |
2558 | ||
f9d7562f BF |
2559 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open->op_share_access); |
2560 | if (status) { | |
2561 | kmem_cache_free(stateid_slab, stp); | |
2562 | return status; | |
1da177e4 | 2563 | } |
1da177e4 LT |
2564 | *stpp = stp; |
2565 | return 0; | |
2566 | } | |
2567 | ||
b37ad28b | 2568 | static inline __be32 |
1da177e4 LT |
2569 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2570 | struct nfsd4_open *open) | |
2571 | { | |
2572 | struct iattr iattr = { | |
2573 | .ia_valid = ATTR_SIZE, | |
2574 | .ia_size = 0, | |
2575 | }; | |
2576 | if (!open->op_truncate) | |
2577 | return 0; | |
2578 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2579 | return nfserr_inval; |
1da177e4 LT |
2580 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2581 | } | |
2582 | ||
b37ad28b | 2583 | static __be32 |
f9d7562f | 2584 | 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 | 2585 | { |
7d947842 BF |
2586 | u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; |
2587 | bool new_access; | |
b37ad28b | 2588 | __be32 status; |
1da177e4 | 2589 | |
7d947842 | 2590 | new_access = !test_bit(op_share_access, &stp->st_access_bmap); |
f9d7562f | 2591 | if (new_access) { |
7d947842 | 2592 | status = nfs4_get_vfs_file(rqstp, fp, cur_fh, op_share_access); |
f9d7562f BF |
2593 | if (status) |
2594 | return status; | |
6c26d08f | 2595 | } |
1da177e4 LT |
2596 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2597 | if (status) { | |
f9d7562f BF |
2598 | if (new_access) { |
2599 | int oflag = nfs4_access_to_omode(new_access); | |
2600 | nfs4_file_put_access(fp, oflag); | |
2601 | } | |
1da177e4 LT |
2602 | return status; |
2603 | } | |
2604 | /* remember the open */ | |
24a0111e | 2605 | __set_bit(op_share_access, &stp->st_access_bmap); |
b55e0ba1 | 2606 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
1da177e4 LT |
2607 | |
2608 | return nfs_ok; | |
2609 | } | |
2610 | ||
2611 | ||
1da177e4 | 2612 | static void |
37515177 | 2613 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2614 | { |
37515177 N |
2615 | open->op_stateowner->so_confirmed = 1; |
2616 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2617 | } |
2618 | ||
14a24e99 BF |
2619 | /* Should we give out recallable state?: */ |
2620 | static bool nfsd4_cb_channel_good(struct nfs4_client *clp) | |
2621 | { | |
2622 | if (clp->cl_cb_state == NFSD4_CB_UP) | |
2623 | return true; | |
2624 | /* | |
2625 | * In the sessions case, since we don't have to establish a | |
2626 | * separate connection for callbacks, we assume it's OK | |
2627 | * until we hear otherwise: | |
2628 | */ | |
2629 | return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; | |
2630 | } | |
2631 | ||
22d38c4c BF |
2632 | static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) |
2633 | { | |
2634 | struct file_lock *fl; | |
2635 | ||
2636 | fl = locks_alloc_lock(); | |
2637 | if (!fl) | |
2638 | return NULL; | |
2639 | locks_init_lock(fl); | |
2640 | fl->fl_lmops = &nfsd_lease_mng_ops; | |
2641 | fl->fl_flags = FL_LEASE; | |
2642 | fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; | |
2643 | fl->fl_end = OFFSET_MAX; | |
acfdf5c3 | 2644 | fl->fl_owner = (fl_owner_t)(dp->dl_file); |
22d38c4c | 2645 | fl->fl_pid = current->tgid; |
22d38c4c BF |
2646 | return fl; |
2647 | } | |
2648 | ||
edab9782 BF |
2649 | static int nfs4_setlease(struct nfs4_delegation *dp, int flag) |
2650 | { | |
acfdf5c3 | 2651 | struct nfs4_file *fp = dp->dl_file; |
edab9782 BF |
2652 | struct file_lock *fl; |
2653 | int status; | |
2654 | ||
2655 | fl = nfs4_alloc_init_lease(dp, flag); | |
2656 | if (!fl) | |
2657 | return -ENOMEM; | |
acfdf5c3 BF |
2658 | fl->fl_file = find_readable_file(fp); |
2659 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
2660 | status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); | |
edab9782 | 2661 | if (status) { |
acfdf5c3 | 2662 | list_del_init(&dp->dl_perclnt); |
edab9782 BF |
2663 | locks_free_lock(fl); |
2664 | return -ENOMEM; | |
2665 | } | |
acfdf5c3 BF |
2666 | fp->fi_lease = fl; |
2667 | fp->fi_deleg_file = fl->fl_file; | |
2668 | get_file(fp->fi_deleg_file); | |
2669 | atomic_set(&fp->fi_delegees, 1); | |
2670 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2671 | return 0; | |
2672 | } | |
2673 | ||
2674 | static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) | |
2675 | { | |
2676 | struct nfs4_file *fp = dp->dl_file; | |
2677 | ||
2678 | if (!fp->fi_lease) | |
2679 | return nfs4_setlease(dp, flag); | |
2680 | spin_lock(&recall_lock); | |
2681 | if (fp->fi_had_conflict) { | |
2682 | spin_unlock(&recall_lock); | |
2683 | return -EAGAIN; | |
2684 | } | |
2685 | atomic_inc(&fp->fi_delegees); | |
2686 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
2687 | spin_unlock(&recall_lock); | |
2688 | list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); | |
edab9782 BF |
2689 | return 0; |
2690 | } | |
2691 | ||
1da177e4 LT |
2692 | /* |
2693 | * Attempt to hand out a delegation. | |
2694 | */ | |
2695 | static void | |
2696 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2697 | { | |
2698 | struct nfs4_delegation *dp; | |
2699 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
14a24e99 | 2700 | int cb_up; |
1da177e4 LT |
2701 | int status, flag = 0; |
2702 | ||
14a24e99 | 2703 | cb_up = nfsd4_cb_channel_good(sop->so_client); |
1da177e4 | 2704 | flag = NFS4_OPEN_DELEGATE_NONE; |
7b190fec N |
2705 | open->op_recall = 0; |
2706 | switch (open->op_claim_type) { | |
2707 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2708 | if (!cb_up) |
7b190fec N |
2709 | open->op_recall = 1; |
2710 | flag = open->op_delegate_type; | |
2711 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2712 | goto out; | |
2713 | break; | |
2714 | case NFS4_OPEN_CLAIM_NULL: | |
2715 | /* Let's not give out any delegations till everyone's | |
2716 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2717 | if (locks_in_grace()) |
7b190fec | 2718 | goto out; |
2bf23875 | 2719 | if (!cb_up || !sop->so_confirmed) |
7b190fec N |
2720 | goto out; |
2721 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2722 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2723 | else | |
2724 | flag = NFS4_OPEN_DELEGATE_READ; | |
2725 | break; | |
2726 | default: | |
2727 | goto out; | |
2728 | } | |
1da177e4 LT |
2729 | |
2730 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
dd239cc0 BF |
2731 | if (dp == NULL) |
2732 | goto out_no_deleg; | |
acfdf5c3 | 2733 | status = nfs4_set_delegation(dp, flag); |
edab9782 | 2734 | if (status) |
dd239cc0 | 2735 | goto out_free; |
1da177e4 LT |
2736 | |
2737 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2738 | ||
8c10cbdb BH |
2739 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2740 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2741 | out: |
7b190fec N |
2742 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2743 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2744 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2745 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 | 2746 | open->op_delegate_type = flag; |
dd239cc0 BF |
2747 | return; |
2748 | out_free: | |
acfdf5c3 | 2749 | nfs4_put_delegation(dp); |
dd239cc0 BF |
2750 | out_no_deleg: |
2751 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2752 | goto out; | |
1da177e4 LT |
2753 | } |
2754 | ||
2755 | /* | |
2756 | * called with nfs4_lock_state() held. | |
2757 | */ | |
b37ad28b | 2758 | __be32 |
1da177e4 LT |
2759 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2760 | { | |
6668958f | 2761 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2762 | struct nfs4_file *fp = NULL; |
2763 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2764 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2765 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2766 | __be32 status; |
1da177e4 LT |
2767 | |
2768 | status = nfserr_inval; | |
d87a8ade | 2769 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2770 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2771 | goto out; |
2772 | /* | |
2773 | * Lookup file; if found, lookup stateid and check open request, | |
2774 | * and check for delegations in the process of being recalled. | |
2775 | * If not found, create the nfs4_file struct | |
2776 | */ | |
2777 | fp = find_file(ino); | |
2778 | if (fp) { | |
2779 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2780 | goto out; | |
c44c5eeb N |
2781 | status = nfs4_check_deleg(fp, open, &dp); |
2782 | if (status) | |
2783 | goto out; | |
1da177e4 | 2784 | } else { |
c44c5eeb N |
2785 | status = nfserr_bad_stateid; |
2786 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2787 | goto out; | |
1da177e4 LT |
2788 | status = nfserr_resource; |
2789 | fp = alloc_init_file(ino); | |
2790 | if (fp == NULL) | |
2791 | goto out; | |
2792 | } | |
2793 | ||
2794 | /* | |
2795 | * OPEN the file, or upgrade an existing OPEN. | |
2796 | * If truncate fails, the OPEN fails. | |
2797 | */ | |
2798 | if (stp) { | |
2799 | /* Stateid was found, this is an OPEN upgrade */ | |
f9d7562f | 2800 | status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); |
1da177e4 LT |
2801 | if (status) |
2802 | goto out; | |
444c2c07 | 2803 | update_stateid(&stp->st_stateid); |
1da177e4 | 2804 | } else { |
f9d7562f | 2805 | status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); |
567d9829 | 2806 | if (status) |
1da177e4 LT |
2807 | goto out; |
2808 | init_stateid(stp, fp, open); | |
2809 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2810 | if (status) { | |
2283963f | 2811 | release_open_stateid(stp); |
1da177e4 LT |
2812 | goto out; |
2813 | } | |
6668958f AA |
2814 | if (nfsd4_has_session(&resp->cstate)) |
2815 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2816 | } |
2817 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2818 | ||
4dc6ec00 | 2819 | if (nfsd4_has_session(&resp->cstate)) |
6668958f AA |
2820 | open->op_stateowner->so_confirmed = 1; |
2821 | ||
1da177e4 LT |
2822 | /* |
2823 | * Attempt to hand out a delegation. No error return, because the | |
2824 | * OPEN succeeds even if we fail. | |
2825 | */ | |
2826 | nfs4_open_delegation(current_fh, open, stp); | |
2827 | ||
2828 | status = nfs_ok; | |
2829 | ||
8c10cbdb BH |
2830 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2831 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2832 | out: |
13cd2184 N |
2833 | if (fp) |
2834 | put_nfs4_file(fp); | |
37515177 N |
2835 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2836 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2837 | /* |
2838 | * To finish the open response, we just need to set the rflags. | |
2839 | */ | |
2840 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2841 | if (!open->op_stateowner->so_confirmed && |
2842 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2843 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2844 | ||
2845 | return status; | |
2846 | } | |
2847 | ||
b37ad28b | 2848 | __be32 |
b591480b BF |
2849 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2850 | clientid_t *clid) | |
1da177e4 LT |
2851 | { |
2852 | struct nfs4_client *clp; | |
b37ad28b | 2853 | __be32 status; |
1da177e4 LT |
2854 | |
2855 | nfs4_lock_state(); | |
2856 | dprintk("process_renew(%08x/%08x): starting\n", | |
2857 | clid->cl_boot, clid->cl_id); | |
2858 | status = nfserr_stale_clientid; | |
2859 | if (STALE_CLIENTID(clid)) | |
2860 | goto out; | |
2861 | clp = find_confirmed_client(clid); | |
2862 | status = nfserr_expired; | |
2863 | if (clp == NULL) { | |
2864 | /* We assume the client took too long to RENEW. */ | |
2865 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2866 | goto out; | |
2867 | } | |
2868 | renew_client(clp); | |
2869 | status = nfserr_cb_path_down; | |
ea1da636 | 2870 | if (!list_empty(&clp->cl_delegations) |
77a3569d | 2871 | && clp->cl_cb_state != NFSD4_CB_UP) |
1da177e4 LT |
2872 | goto out; |
2873 | status = nfs_ok; | |
2874 | out: | |
2875 | nfs4_unlock_state(); | |
2876 | return status; | |
2877 | } | |
2878 | ||
af558e33 BF |
2879 | struct lock_manager nfsd4_manager = { |
2880 | }; | |
2881 | ||
a76b4319 | 2882 | static void |
af558e33 | 2883 | nfsd4_end_grace(void) |
a76b4319 N |
2884 | { |
2885 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2886 | nfsd4_recdir_purge_old(); |
af558e33 | 2887 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2888 | /* |
2889 | * Now that every NFSv4 client has had the chance to recover and | |
2890 | * to see the (possibly new, possibly shorter) lease time, we | |
2891 | * can safely set the next grace time to the current lease time: | |
2892 | */ | |
2893 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2894 | } |
2895 | ||
fd39ca9a | 2896 | static time_t |
1da177e4 LT |
2897 | nfs4_laundromat(void) |
2898 | { | |
2899 | struct nfs4_client *clp; | |
2900 | struct nfs4_stateowner *sop; | |
2901 | struct nfs4_delegation *dp; | |
2902 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
2903 | time_t cutoff = get_seconds() - nfsd4_lease; |
2904 | time_t t, clientid_val = nfsd4_lease; | |
2905 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
2906 | |
2907 | nfs4_lock_state(); | |
2908 | ||
2909 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2910 | if (locks_in_grace()) |
2911 | nfsd4_end_grace(); | |
36acb66b BH |
2912 | INIT_LIST_HEAD(&reaplist); |
2913 | spin_lock(&client_lock); | |
1da177e4 LT |
2914 | list_for_each_safe(pos, next, &client_lru) { |
2915 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2916 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2917 | t = clp->cl_time - cutoff; | |
2918 | if (clientid_val > t) | |
2919 | clientid_val = t; | |
2920 | break; | |
2921 | } | |
d7682988 BH |
2922 | if (atomic_read(&clp->cl_refcount)) { |
2923 | dprintk("NFSD: client in use (clientid %08x)\n", | |
2924 | clp->cl_clientid.cl_id); | |
2925 | continue; | |
2926 | } | |
2927 | unhash_client_locked(clp); | |
2928 | list_add(&clp->cl_lru, &reaplist); | |
36acb66b BH |
2929 | } |
2930 | spin_unlock(&client_lock); | |
2931 | list_for_each_safe(pos, next, &reaplist) { | |
2932 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1da177e4 LT |
2933 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
2934 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2935 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2936 | expire_client(clp); |
2937 | } | |
1da177e4 LT |
2938 | spin_lock(&recall_lock); |
2939 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2940 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2941 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
2942 | u = dp->dl_time - cutoff; | |
2943 | if (test_val > u) | |
2944 | test_val = u; | |
2945 | break; | |
2946 | } | |
1da177e4 LT |
2947 | list_move(&dp->dl_recall_lru, &reaplist); |
2948 | } | |
2949 | spin_unlock(&recall_lock); | |
2950 | list_for_each_safe(pos, next, &reaplist) { | |
2951 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2952 | list_del_init(&dp->dl_recall_lru); | |
2953 | unhash_delegation(dp); | |
2954 | } | |
cf07d2ea | 2955 | test_val = nfsd4_lease; |
1da177e4 LT |
2956 | list_for_each_safe(pos, next, &close_lru) { |
2957 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
2958 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
2959 | u = sop->so_time - cutoff; | |
2960 | if (test_val > u) | |
2961 | test_val = u; | |
2962 | break; | |
2963 | } | |
2964 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
2965 | sop->so_id); | |
f044ff83 | 2966 | release_openowner(sop); |
1da177e4 LT |
2967 | } |
2968 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
2969 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
2970 | nfs4_unlock_state(); | |
2971 | return clientid_val; | |
2972 | } | |
2973 | ||
a254b246 HH |
2974 | static struct workqueue_struct *laundry_wq; |
2975 | static void laundromat_main(struct work_struct *); | |
2976 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
2977 | ||
2978 | static void | |
c4028958 | 2979 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
2980 | { |
2981 | time_t t; | |
2982 | ||
2983 | t = nfs4_laundromat(); | |
2984 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 2985 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
2986 | } |
2987 | ||
fd39ca9a | 2988 | static struct nfs4_stateowner * |
f8816512 N |
2989 | search_close_lru(u32 st_id, int flags) |
2990 | { | |
1da177e4 LT |
2991 | struct nfs4_stateowner *local = NULL; |
2992 | ||
1da177e4 LT |
2993 | if (flags & CLOSE_STATE) { |
2994 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
2995 | if (local->so_id == st_id) | |
2996 | return local; | |
2997 | } | |
2998 | } | |
2999 | return NULL; | |
3000 | } | |
3001 | ||
3002 | static inline int | |
3003 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
3004 | { | |
f9d7562f | 3005 | return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; |
1da177e4 LT |
3006 | } |
3007 | ||
3008 | static int | |
3009 | STALE_STATEID(stateid_t *stateid) | |
3010 | { | |
e4e83ea4 BF |
3011 | if (stateid->si_boot == boot_time) |
3012 | return 0; | |
3013 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", | |
8c10cbdb | 3014 | STATEID_VAL(stateid)); |
e4e83ea4 | 3015 | return 1; |
1da177e4 LT |
3016 | } |
3017 | ||
3018 | static inline int | |
3019 | access_permit_read(unsigned long access_bmap) | |
3020 | { | |
3021 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
3022 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
3023 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
3024 | } | |
3025 | ||
3026 | static inline int | |
3027 | access_permit_write(unsigned long access_bmap) | |
3028 | { | |
3029 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
3030 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
3031 | } | |
3032 | ||
3033 | static | |
b37ad28b | 3034 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 3035 | { |
b37ad28b | 3036 | __be32 status = nfserr_openmode; |
1da177e4 | 3037 | |
02921914 BF |
3038 | /* For lock stateid's, we test the parent open, not the lock: */ |
3039 | if (stp->st_openstp) | |
3040 | stp = stp->st_openstp; | |
1da177e4 LT |
3041 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
3042 | goto out; | |
3043 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
3044 | goto out; | |
3045 | status = nfs_ok; | |
3046 | out: | |
3047 | return status; | |
3048 | } | |
3049 | ||
b37ad28b | 3050 | static inline __be32 |
1da177e4 LT |
3051 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
3052 | { | |
203a8c8e | 3053 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 3054 | return nfs_ok; |
af558e33 | 3055 | else if (locks_in_grace()) { |
1da177e4 LT |
3056 | /* Answer in remaining cases depends on existance of |
3057 | * conflicting state; so we must wait out the grace period. */ | |
3058 | return nfserr_grace; | |
3059 | } else if (flags & WR_STATE) | |
3060 | return nfs4_share_conflict(current_fh, | |
3061 | NFS4_SHARE_DENY_WRITE); | |
3062 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
3063 | return nfs4_share_conflict(current_fh, | |
3064 | NFS4_SHARE_DENY_READ); | |
3065 | } | |
3066 | ||
3067 | /* | |
3068 | * Allow READ/WRITE during grace period on recovered state only for files | |
3069 | * that are not able to provide mandatory locking. | |
3070 | */ | |
3071 | static inline int | |
18f82731 | 3072 | grace_disallows_io(struct inode *inode) |
1da177e4 | 3073 | { |
203a8c8e | 3074 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
3075 | } |
3076 | ||
6668958f | 3077 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 3078 | { |
6668958f AA |
3079 | /* |
3080 | * When sessions are used the stateid generation number is ignored | |
3081 | * when it is zero. | |
3082 | */ | |
3083 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
3084 | goto out; | |
3085 | ||
0836f587 BF |
3086 | /* If the client sends us a stateid from the future, it's buggy: */ |
3087 | if (in->si_generation > ref->si_generation) | |
3088 | return nfserr_bad_stateid; | |
3089 | /* | |
3090 | * The following, however, can happen. For example, if the | |
3091 | * client sends an open and some IO at the same time, the open | |
3092 | * may bump si_generation while the IO is still in flight. | |
3093 | * Thanks to hard links and renames, the client never knows what | |
3094 | * file an open will affect. So it could avoid that situation | |
3095 | * only by serializing all opens and IO from the same open | |
3096 | * owner. To recover from the old_stateid error, the client | |
3097 | * will just have to retry the IO: | |
3098 | */ | |
3099 | if (in->si_generation < ref->si_generation) | |
3100 | return nfserr_old_stateid; | |
6668958f | 3101 | out: |
0836f587 BF |
3102 | return nfs_ok; |
3103 | } | |
3104 | ||
3e633079 BF |
3105 | static int is_delegation_stateid(stateid_t *stateid) |
3106 | { | |
3107 | return stateid->si_fileid == 0; | |
3108 | } | |
3109 | ||
1da177e4 LT |
3110 | /* |
3111 | * Checks for stateid operations | |
3112 | */ | |
b37ad28b | 3113 | __be32 |
dd453dfd BH |
3114 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
3115 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
3116 | { |
3117 | struct nfs4_stateid *stp = NULL; | |
3118 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 3119 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 3120 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 3121 | __be32 status; |
1da177e4 | 3122 | |
1da177e4 LT |
3123 | if (filpp) |
3124 | *filpp = NULL; | |
3125 | ||
18f82731 | 3126 | if (grace_disallows_io(ino)) |
1da177e4 LT |
3127 | return nfserr_grace; |
3128 | ||
6668958f AA |
3129 | if (nfsd4_has_session(cstate)) |
3130 | flags |= HAS_SESSION; | |
3131 | ||
1da177e4 LT |
3132 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
3133 | return check_special_stateids(current_fh, stateid, flags); | |
3134 | ||
1da177e4 LT |
3135 | status = nfserr_stale_stateid; |
3136 | if (STALE_STATEID(stateid)) | |
3137 | goto out; | |
3138 | ||
33515142 BF |
3139 | /* |
3140 | * We assume that any stateid that has the current boot time, | |
3141 | * but that we can't find, is expired: | |
3142 | */ | |
3143 | status = nfserr_expired; | |
3e633079 | 3144 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 3145 | dp = find_delegation_stateid(ino, stateid); |
e4e83ea4 | 3146 | if (!dp) |
1da177e4 | 3147 | goto out; |
6668958f AA |
3148 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
3149 | flags); | |
0c2a498f BF |
3150 | if (status) |
3151 | goto out; | |
dc9bf700 BF |
3152 | status = nfs4_check_delegmode(dp, flags); |
3153 | if (status) | |
3154 | goto out; | |
3155 | renew_client(dp->dl_client); | |
43b0178e | 3156 | if (filpp) { |
acfdf5c3 | 3157 | *filpp = dp->dl_file->fi_deleg_file; |
43b0178e DC |
3158 | BUG_ON(!*filpp); |
3159 | } | |
1da177e4 | 3160 | } else { /* open or lock stateid */ |
a4455be0 | 3161 | stp = find_stateid(stateid, flags); |
e4e83ea4 | 3162 | if (!stp) |
1da177e4 | 3163 | goto out; |
33515142 | 3164 | status = nfserr_bad_stateid; |
6150ef0d | 3165 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
3166 | goto out; |
3167 | if (!stp->st_stateowner->so_confirmed) | |
3168 | goto out; | |
6668958f AA |
3169 | status = check_stateid_generation(stateid, &stp->st_stateid, |
3170 | flags); | |
0c2a498f BF |
3171 | if (status) |
3172 | goto out; | |
a4455be0 BF |
3173 | status = nfs4_check_openmode(stp, flags); |
3174 | if (status) | |
1da177e4 LT |
3175 | goto out; |
3176 | renew_client(stp->st_stateowner->so_client); | |
f9d7562f BF |
3177 | if (filpp) { |
3178 | if (flags & RD_STATE) | |
3179 | *filpp = find_readable_file(stp->st_file); | |
3180 | else | |
3181 | *filpp = find_writeable_file(stp->st_file); | |
f9d7562f | 3182 | } |
1da177e4 LT |
3183 | } |
3184 | status = nfs_ok; | |
3185 | out: | |
3186 | return status; | |
3187 | } | |
3188 | ||
4c4cd222 N |
3189 | static inline int |
3190 | setlkflg (int type) | |
3191 | { | |
3192 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
3193 | RD_STATE : WR_STATE; | |
3194 | } | |
1da177e4 LT |
3195 | |
3196 | /* | |
3197 | * Checks for sequence id mutating operations. | |
3198 | */ | |
b37ad28b | 3199 | static __be32 |
dd453dfd BH |
3200 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
3201 | stateid_t *stateid, int flags, | |
3202 | struct nfs4_stateowner **sopp, | |
3203 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 3204 | { |
1da177e4 LT |
3205 | struct nfs4_stateid *stp; |
3206 | struct nfs4_stateowner *sop; | |
dd453dfd | 3207 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 3208 | __be32 status; |
1da177e4 | 3209 | |
8c10cbdb BH |
3210 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
3211 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 3212 | |
1da177e4 LT |
3213 | *stpp = NULL; |
3214 | *sopp = NULL; | |
3215 | ||
1da177e4 | 3216 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 3217 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 3218 | return nfserr_bad_stateid; |
1da177e4 LT |
3219 | } |
3220 | ||
1da177e4 | 3221 | if (STALE_STATEID(stateid)) |
3a4f98bb | 3222 | return nfserr_stale_stateid; |
6668958f AA |
3223 | |
3224 | if (nfsd4_has_session(cstate)) | |
3225 | flags |= HAS_SESSION; | |
3226 | ||
1da177e4 LT |
3227 | /* |
3228 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
3229 | * the confirmed flag is incorrecly set, or the generation | |
3230 | * number is incorrect. | |
1da177e4 | 3231 | */ |
f8816512 N |
3232 | stp = find_stateid(stateid, flags); |
3233 | if (stp == NULL) { | |
3234 | /* | |
3235 | * Also, we should make sure this isn't just the result of | |
3236 | * a replayed close: | |
3237 | */ | |
3238 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
33515142 | 3239 | /* It's not stale; let's assume it's expired: */ |
f8816512 | 3240 | if (sop == NULL) |
33515142 | 3241 | return nfserr_expired; |
f8816512 N |
3242 | *sopp = sop; |
3243 | goto check_replay; | |
3244 | } | |
1da177e4 | 3245 | |
39325bd0 BF |
3246 | *stpp = stp; |
3247 | *sopp = sop = stp->st_stateowner; | |
3248 | ||
4c4cd222 | 3249 | if (lock) { |
4c4cd222 | 3250 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 3251 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 3252 | int lkflg = 0; |
b37ad28b | 3253 | __be32 status; |
4c4cd222 N |
3254 | |
3255 | lkflg = setlkflg(lock->lk_type); | |
3256 | ||
3257 | if (lock->lk_is_new) { | |
599e0a22 BF |
3258 | if (!sop->so_is_open_owner) |
3259 | return nfserr_bad_stateid; | |
60adfc50 AA |
3260 | if (!(flags & HAS_SESSION) && |
3261 | !same_clid(&clp->cl_clientid, lockclid)) | |
3262 | return nfserr_bad_stateid; | |
599e0a22 BF |
3263 | /* stp is the open stateid */ |
3264 | status = nfs4_check_openmode(stp, lkflg); | |
3265 | if (status) | |
3266 | return status; | |
3267 | } else { | |
3268 | /* stp is the lock stateid */ | |
3269 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
3270 | if (status) | |
3271 | return status; | |
4c4cd222 | 3272 | } |
1da177e4 LT |
3273 | } |
3274 | ||
f3362737 | 3275 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 3276 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 3277 | return nfserr_bad_stateid; |
1da177e4 LT |
3278 | } |
3279 | ||
1da177e4 LT |
3280 | /* |
3281 | * We now validate the seqid and stateid generation numbers. | |
3282 | * For the moment, we ignore the possibility of | |
3283 | * generation number wraparound. | |
3284 | */ | |
6668958f | 3285 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
3286 | goto check_replay; |
3287 | ||
3a4f98bb | 3288 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 3289 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3290 | " unconfirmed stateowner!\n"); |
3291 | return nfserr_bad_stateid; | |
1da177e4 | 3292 | } |
3a4f98bb | 3293 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3294 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3295 | " confirmed yet!\n"); |
3296 | return nfserr_bad_stateid; | |
1da177e4 | 3297 | } |
6668958f | 3298 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
3299 | if (status) |
3300 | return status; | |
52fd004e | 3301 | renew_client(sop->so_client); |
3a4f98bb | 3302 | return nfs_ok; |
1da177e4 | 3303 | |
1da177e4 | 3304 | check_replay: |
bd9aac52 | 3305 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3306 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3307 | /* indicate replay to calling function */ |
a90b061c | 3308 | return nfserr_replay_me; |
1da177e4 | 3309 | } |
2fdada03 | 3310 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3311 | sop->so_seqid, seqid); |
3312 | *sopp = NULL; | |
3313 | return nfserr_bad_seqid; | |
1da177e4 LT |
3314 | } |
3315 | ||
b37ad28b | 3316 | __be32 |
ca364317 | 3317 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3318 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3319 | { |
b37ad28b | 3320 | __be32 status; |
1da177e4 LT |
3321 | struct nfs4_stateowner *sop; |
3322 | struct nfs4_stateid *stp; | |
3323 | ||
3324 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3325 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3326 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3327 | |
ca364317 | 3328 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3329 | if (status) |
3330 | return status; | |
1da177e4 LT |
3331 | |
3332 | nfs4_lock_state(); | |
3333 | ||
dd453dfd | 3334 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3335 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3336 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3337 | &oc->oc_stateowner, &stp, NULL))) |
3338 | goto out; | |
3339 | ||
3340 | sop = oc->oc_stateowner; | |
3341 | sop->so_confirmed = 1; | |
3342 | update_stateid(&stp->st_stateid); | |
3343 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
3344 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
3345 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
3346 | |
3347 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3348 | out: |
f2327d9a | 3349 | if (oc->oc_stateowner) { |
1da177e4 | 3350 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3351 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3352 | } |
1da177e4 LT |
3353 | nfs4_unlock_state(); |
3354 | return status; | |
3355 | } | |
3356 | ||
3357 | ||
3358 | /* | |
3359 | * unset all bits in union bitmap (bmap) that | |
3360 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
3361 | */ | |
3362 | static void | |
3363 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
3364 | { | |
3365 | int i; | |
3366 | for (i = 1; i < 4; i++) { | |
3367 | if ((i & access) != i) | |
3368 | __clear_bit(i, bmap); | |
3369 | } | |
3370 | } | |
3371 | ||
3372 | static void | |
3373 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3374 | { | |
3375 | int i; | |
3376 | for (i = 0; i < 4; i++) { | |
3377 | if ((i & deny) != i) | |
3378 | __clear_bit(i, bmap); | |
3379 | } | |
3380 | } | |
3381 | ||
b37ad28b | 3382 | __be32 |
ca364317 BF |
3383 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3384 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3385 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3386 | { |
b37ad28b | 3387 | __be32 status; |
1da177e4 LT |
3388 | struct nfs4_stateid *stp; |
3389 | unsigned int share_access; | |
3390 | ||
3391 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3392 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3393 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3394 | |
d87a8ade | 3395 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3396 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3397 | return nfserr_inval; |
3398 | ||
3399 | nfs4_lock_state(); | |
dd453dfd | 3400 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3401 | od->od_seqid, |
1da177e4 | 3402 | &od->od_stateid, |
f3362737 | 3403 | OPEN_STATE, |
1da177e4 LT |
3404 | &od->od_stateowner, &stp, NULL))) |
3405 | goto out; | |
3406 | ||
3407 | status = nfserr_inval; | |
3408 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3409 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3410 | stp->st_access_bmap, od->od_share_access); | |
3411 | goto out; | |
3412 | } | |
3413 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3414 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3415 | stp->st_deny_bmap, od->od_share_deny); | |
3416 | goto out; | |
3417 | } | |
3418 | set_access(&share_access, stp->st_access_bmap); | |
f9d7562f | 3419 | nfs4_file_downgrade(stp->st_file, share_access & ~od->od_share_access); |
1da177e4 LT |
3420 | |
3421 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
3422 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
3423 | ||
3424 | update_stateid(&stp->st_stateid); | |
3425 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3426 | status = nfs_ok; | |
3427 | out: | |
f2327d9a | 3428 | if (od->od_stateowner) { |
1da177e4 | 3429 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3430 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3431 | } |
1da177e4 LT |
3432 | nfs4_unlock_state(); |
3433 | return status; | |
3434 | } | |
3435 | ||
3436 | /* | |
3437 | * nfs4_unlock_state() called after encode | |
3438 | */ | |
b37ad28b | 3439 | __be32 |
ca364317 | 3440 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3441 | struct nfsd4_close *close) |
1da177e4 | 3442 | { |
b37ad28b | 3443 | __be32 status; |
1da177e4 LT |
3444 | struct nfs4_stateid *stp; |
3445 | ||
3446 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3447 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3448 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3449 | |
3450 | nfs4_lock_state(); | |
3451 | /* check close_lru for replay */ | |
dd453dfd | 3452 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3453 | close->cl_seqid, |
1da177e4 | 3454 | &close->cl_stateid, |
f3362737 | 3455 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3456 | &close->cl_stateowner, &stp, NULL))) |
3457 | goto out; | |
1da177e4 LT |
3458 | status = nfs_ok; |
3459 | update_stateid(&stp->st_stateid); | |
3460 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3461 | ||
04ef5954 | 3462 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3463 | release_open_stateid(stp); |
04ef5954 BF |
3464 | |
3465 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3466 | * released by the laundromat service after the lease period | |
3467 | * to enable us to handle CLOSE replay | |
3468 | */ | |
3469 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3470 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3471 | out: |
f2327d9a | 3472 | if (close->cl_stateowner) { |
1da177e4 | 3473 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3474 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3475 | } |
1da177e4 LT |
3476 | nfs4_unlock_state(); |
3477 | return status; | |
3478 | } | |
3479 | ||
b37ad28b | 3480 | __be32 |
ca364317 BF |
3481 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3482 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3483 | { |
203a8c8e BF |
3484 | struct nfs4_delegation *dp; |
3485 | stateid_t *stateid = &dr->dr_stateid; | |
3486 | struct inode *inode; | |
b37ad28b | 3487 | __be32 status; |
6668958f | 3488 | int flags = 0; |
1da177e4 | 3489 | |
ca364317 | 3490 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3491 | return status; |
3492 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3493 | |
6668958f AA |
3494 | if (nfsd4_has_session(cstate)) |
3495 | flags |= HAS_SESSION; | |
1da177e4 | 3496 | nfs4_lock_state(); |
203a8c8e BF |
3497 | status = nfserr_bad_stateid; |
3498 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3499 | goto out; | |
3500 | status = nfserr_stale_stateid; | |
3501 | if (STALE_STATEID(stateid)) | |
3502 | goto out; | |
7e0f7cf5 | 3503 | status = nfserr_bad_stateid; |
203a8c8e BF |
3504 | if (!is_delegation_stateid(stateid)) |
3505 | goto out; | |
33515142 | 3506 | status = nfserr_expired; |
203a8c8e | 3507 | dp = find_delegation_stateid(inode, stateid); |
e4e83ea4 | 3508 | if (!dp) |
203a8c8e | 3509 | goto out; |
6668958f | 3510 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3511 | if (status) |
3512 | goto out; | |
3513 | renew_client(dp->dl_client); | |
3514 | ||
3515 | unhash_delegation(dp); | |
1da177e4 | 3516 | out: |
203a8c8e BF |
3517 | nfs4_unlock_state(); |
3518 | ||
1da177e4 LT |
3519 | return status; |
3520 | } | |
3521 | ||
3522 | ||
3523 | /* | |
3524 | * Lock owner state (byte-range locks) | |
3525 | */ | |
3526 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3527 | #define LOCK_HASH_BITS 8 | |
3528 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3529 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3530 | ||
87df4de8 BH |
3531 | static inline u64 |
3532 | end_offset(u64 start, u64 len) | |
3533 | { | |
3534 | u64 end; | |
3535 | ||
3536 | end = start + len; | |
3537 | return end >= start ? end: NFS4_MAX_UINT64; | |
3538 | } | |
3539 | ||
3540 | /* last octet in a range */ | |
3541 | static inline u64 | |
3542 | last_byte_offset(u64 start, u64 len) | |
3543 | { | |
3544 | u64 end; | |
3545 | ||
3546 | BUG_ON(!len); | |
3547 | end = start + len; | |
3548 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3549 | } | |
3550 | ||
1da177e4 LT |
3551 | #define lockownerid_hashval(id) \ |
3552 | ((id) & LOCK_HASH_MASK) | |
3553 | ||
3554 | static inline unsigned int | |
3555 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3556 | struct xdr_netobj *ownername) | |
3557 | { | |
3558 | return (file_hashval(inode) + cl_id | |
3559 | + opaque_hashval(ownername->data, ownername->len)) | |
3560 | & LOCK_HASH_MASK; | |
3561 | } | |
3562 | ||
3563 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3564 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3565 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3566 | ||
fd39ca9a | 3567 | static struct nfs4_stateid * |
1da177e4 LT |
3568 | find_stateid(stateid_t *stid, int flags) |
3569 | { | |
9346eff0 | 3570 | struct nfs4_stateid *local; |
1da177e4 LT |
3571 | u32 st_id = stid->si_stateownerid; |
3572 | u32 f_id = stid->si_fileid; | |
3573 | unsigned int hashval; | |
3574 | ||
3575 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3576 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3577 | hashval = stateid_hashval(st_id, f_id); |
3578 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3579 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3580 | (local->st_stateid.si_fileid == f_id)) | |
3581 | return local; | |
3582 | } | |
3583 | } | |
9346eff0 KK |
3584 | |
3585 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3586 | hashval = stateid_hashval(st_id, f_id); |
3587 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3588 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3589 | (local->st_stateid.si_fileid == f_id)) | |
3590 | return local; | |
3591 | } | |
849823c5 | 3592 | } |
1da177e4 LT |
3593 | return NULL; |
3594 | } | |
3595 | ||
3596 | static struct nfs4_delegation * | |
3597 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3598 | { | |
13cd2184 N |
3599 | struct nfs4_file *fp; |
3600 | struct nfs4_delegation *dl; | |
1da177e4 | 3601 | |
8c10cbdb BH |
3602 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3603 | STATEID_VAL(stid)); | |
1da177e4 | 3604 | |
1da177e4 | 3605 | fp = find_file(ino); |
13cd2184 N |
3606 | if (!fp) |
3607 | return NULL; | |
3608 | dl = find_delegation_file(fp, stid); | |
3609 | put_nfs4_file(fp); | |
3610 | return dl; | |
1da177e4 LT |
3611 | } |
3612 | ||
3613 | /* | |
3614 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3615 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3616 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3617 | * locking, this prevents us from being completely protocol-compliant. The | |
3618 | * real solution to this problem is to start using unsigned file offsets in | |
3619 | * the VFS, but this is a very deep change! | |
3620 | */ | |
3621 | static inline void | |
3622 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3623 | { | |
3624 | if (lock->fl_start < 0) | |
3625 | lock->fl_start = OFFSET_MAX; | |
3626 | if (lock->fl_end < 0) | |
3627 | lock->fl_end = OFFSET_MAX; | |
3628 | } | |
3629 | ||
d5b9026a N |
3630 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3631 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3632 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3633 | }; |
1da177e4 LT |
3634 | |
3635 | static inline void | |
3636 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3637 | { | |
d5b9026a | 3638 | struct nfs4_stateowner *sop; |
1da177e4 | 3639 | |
d5b9026a N |
3640 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3641 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
1da177e4 LT |
3642 | kref_get(&sop->so_ref); |
3643 | deny->ld_sop = sop; | |
3644 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3645 | } else { |
3646 | deny->ld_sop = NULL; | |
3647 | deny->ld_clientid.cl_boot = 0; | |
3648 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3649 | } |
3650 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3651 | deny->ld_length = NFS4_MAX_UINT64; |
3652 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3653 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3654 | deny->ld_type = NFS4_READ_LT; | |
3655 | if (fl->fl_type != F_RDLCK) | |
3656 | deny->ld_type = NFS4_WRITE_LT; | |
3657 | } | |
3658 | ||
1da177e4 LT |
3659 | static struct nfs4_stateowner * |
3660 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3661 | struct xdr_netobj *owner) | |
3662 | { | |
3663 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3664 | struct nfs4_stateowner *op; | |
3665 | ||
3666 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3667 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3668 | return op; |
3669 | } | |
3670 | return NULL; | |
3671 | } | |
3672 | ||
3673 | /* | |
3674 | * Alloc a lock owner structure. | |
3675 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
3676 | * occured. | |
3677 | * | |
3678 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3679 | */ |
3680 | ||
3681 | static struct nfs4_stateowner * | |
3682 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3683 | struct nfs4_stateowner *sop; | |
3684 | struct nfs4_replay *rp; | |
3685 | unsigned int idhashval; | |
3686 | ||
3687 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3688 | return NULL; | |
3689 | idhashval = lockownerid_hashval(current_ownerid); | |
3690 | INIT_LIST_HEAD(&sop->so_idhash); | |
3691 | INIT_LIST_HEAD(&sop->so_strhash); | |
3692 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3693 | INIT_LIST_HEAD(&sop->so_stateids); |
3694 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3695 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3696 | sop->so_time = 0; | |
3697 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3698 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3699 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3700 | sop->so_is_open_owner = 0; |
3701 | sop->so_id = current_ownerid++; | |
3702 | sop->so_client = clp; | |
b59e3c0e NB |
3703 | /* It is the openowner seqid that will be incremented in encode in the |
3704 | * case of new lockowners; so increment the lock seqid manually: */ | |
3705 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3706 | sop->so_confirmed = 1; |
3707 | rp = &sop->so_replay; | |
de1ae286 | 3708 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3709 | rp->rp_buflen = 0; |
3710 | rp->rp_buf = rp->rp_ibuf; | |
3711 | return sop; | |
3712 | } | |
3713 | ||
fd39ca9a | 3714 | static struct nfs4_stateid * |
1da177e4 LT |
3715 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3716 | { | |
3717 | struct nfs4_stateid *stp; | |
3718 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3719 | ||
5ac049ac N |
3720 | stp = nfs4_alloc_stateid(); |
3721 | if (stp == NULL) | |
1da177e4 LT |
3722 | goto out; |
3723 | INIT_LIST_HEAD(&stp->st_hash); | |
3724 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3725 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3726 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3727 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3728 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3729 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3730 | stp->st_stateowner = sop; |
13cd2184 | 3731 | get_nfs4_file(fp); |
1da177e4 | 3732 | stp->st_file = fp; |
e4e83ea4 | 3733 | stp->st_stateid.si_boot = boot_time; |
1da177e4 LT |
3734 | stp->st_stateid.si_stateownerid = sop->so_id; |
3735 | stp->st_stateid.si_fileid = fp->fi_id; | |
3736 | stp->st_stateid.si_generation = 0; | |
1da177e4 | 3737 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
4c4cd222 | 3738 | stp->st_openstp = open_stp; |
1da177e4 LT |
3739 | |
3740 | out: | |
3741 | return stp; | |
3742 | } | |
3743 | ||
fd39ca9a | 3744 | static int |
1da177e4 LT |
3745 | check_lock_length(u64 offset, u64 length) |
3746 | { | |
87df4de8 | 3747 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3748 | LOFF_OVERFLOW(offset, length))); |
3749 | } | |
3750 | ||
3751 | /* | |
3752 | * LOCK operation | |
3753 | */ | |
b37ad28b | 3754 | __be32 |
ca364317 | 3755 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3756 | struct nfsd4_lock *lock) |
1da177e4 | 3757 | { |
3e9e3dbe | 3758 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3759 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 | 3760 | struct nfs4_stateid *lock_stp; |
7d947842 BF |
3761 | struct nfs4_file *fp; |
3762 | struct file *filp = NULL; | |
1da177e4 | 3763 | struct file_lock file_lock; |
8dc7c311 | 3764 | struct file_lock conflock; |
b37ad28b | 3765 | __be32 status = 0; |
1da177e4 | 3766 | unsigned int strhashval; |
150b3934 | 3767 | unsigned int cmd; |
b8dd7b9a | 3768 | int err; |
1da177e4 LT |
3769 | |
3770 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3771 | (long long) lock->lk_offset, | |
3772 | (long long) lock->lk_length); | |
3773 | ||
1da177e4 LT |
3774 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3775 | return nfserr_inval; | |
3776 | ||
ca364317 | 3777 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3778 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3779 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3780 | return status; | |
3781 | } | |
3782 | ||
1da177e4 LT |
3783 | nfs4_lock_state(); |
3784 | ||
3785 | if (lock->lk_is_new) { | |
893f8770 N |
3786 | /* |
3787 | * Client indicates that this is a new lockowner. | |
3788 | * Use open owner and open stateid to create lock owner and | |
3789 | * lock stateid. | |
3790 | */ | |
1da177e4 | 3791 | struct nfs4_stateid *open_stp = NULL; |
1da177e4 LT |
3792 | |
3793 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3794 | if (!nfsd4_has_session(cstate) && |
3795 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3796 | goto out; |
1da177e4 | 3797 | |
1da177e4 | 3798 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3799 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3800 | lock->lk_new_open_seqid, |
3801 | &lock->lk_new_open_stateid, | |
f3362737 | 3802 | OPEN_STATE, |
3a65588a | 3803 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 3804 | lock); |
37515177 | 3805 | if (status) |
1da177e4 | 3806 | goto out; |
3a65588a | 3807 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
3808 | /* create lockowner and lock stateid */ |
3809 | fp = open_stp->st_file; | |
3810 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3811 | open_sop->so_client->cl_clientid.cl_id, | |
3812 | &lock->v.new.owner); | |
3e9e3dbe N |
3813 | /* XXX: Do we need to check for duplicate stateowners on |
3814 | * the same file, or should they just be allowed (and | |
3815 | * create new stateids)? */ | |
1da177e4 | 3816 | status = nfserr_resource; |
b59e3c0e NB |
3817 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3818 | open_sop->so_client, open_stp, lock); | |
3819 | if (lock_sop == NULL) | |
1da177e4 | 3820 | goto out; |
b59e3c0e | 3821 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3822 | if (lock_stp == NULL) |
1da177e4 | 3823 | goto out; |
1da177e4 LT |
3824 | } else { |
3825 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3826 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3827 | lock->lk_old_lock_seqid, |
3828 | &lock->lk_old_lock_stateid, | |
f3362737 | 3829 | LOCK_STATE, |
3a65588a | 3830 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
3831 | if (status) |
3832 | goto out; | |
3a65588a | 3833 | lock_sop = lock->lk_replay_owner; |
7d947842 | 3834 | fp = lock_stp->st_file; |
1da177e4 | 3835 | } |
3a65588a | 3836 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 | 3837 | |
0dd395dc | 3838 | status = nfserr_grace; |
af558e33 | 3839 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3840 | goto out; |
3841 | status = nfserr_no_grace; | |
af558e33 | 3842 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3843 | goto out; |
3844 | ||
1da177e4 LT |
3845 | locks_init_lock(&file_lock); |
3846 | switch (lock->lk_type) { | |
3847 | case NFS4_READ_LT: | |
3848 | case NFS4_READW_LT: | |
7d947842 BF |
3849 | if (find_readable_file(lock_stp->st_file)) { |
3850 | nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_READ); | |
3851 | filp = find_readable_file(lock_stp->st_file); | |
3852 | } | |
1da177e4 | 3853 | file_lock.fl_type = F_RDLCK; |
150b3934 | 3854 | cmd = F_SETLK; |
1da177e4 LT |
3855 | break; |
3856 | case NFS4_WRITE_LT: | |
3857 | case NFS4_WRITEW_LT: | |
7d947842 BF |
3858 | if (find_writeable_file(lock_stp->st_file)) { |
3859 | nfs4_get_vfs_file(rqstp, fp, &cstate->current_fh, NFS4_SHARE_ACCESS_WRITE); | |
3860 | filp = find_writeable_file(lock_stp->st_file); | |
3861 | } | |
1da177e4 | 3862 | file_lock.fl_type = F_WRLCK; |
150b3934 | 3863 | cmd = F_SETLK; |
1da177e4 LT |
3864 | break; |
3865 | default: | |
3866 | status = nfserr_inval; | |
3867 | goto out; | |
3868 | } | |
f9d7562f BF |
3869 | if (!filp) { |
3870 | status = nfserr_openmode; | |
3871 | goto out; | |
3872 | } | |
b59e3c0e | 3873 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3874 | file_lock.fl_pid = current->tgid; |
3875 | file_lock.fl_file = filp; | |
3876 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3877 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3878 | |
3879 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3880 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3881 | nfs4_transform_lock_offset(&file_lock); |
3882 | ||
3883 | /* | |
3884 | * Try to lock the file in the VFS. | |
3885 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3886 | */ | |
3887 | ||
fd85b817 | 3888 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 3889 | switch (-err) { |
1da177e4 LT |
3890 | case 0: /* success! */ |
3891 | update_stateid(&lock_stp->st_stateid); | |
3892 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
3893 | sizeof(stateid_t)); | |
b8dd7b9a | 3894 | status = 0; |
eb76b3fd AA |
3895 | break; |
3896 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3897 | status = nfserr_denied; | |
3898 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3899 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3900 | break; | |
1da177e4 LT |
3901 | case (EDEADLK): |
3902 | status = nfserr_deadlock; | |
eb76b3fd | 3903 | break; |
1da177e4 | 3904 | default: |
fd85b817 | 3905 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
3906 | status = nfserr_resource; |
3907 | break; | |
1da177e4 | 3908 | } |
1da177e4 | 3909 | out: |
8a280510 | 3910 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3911 | release_lockowner(lock_sop); |
3a65588a BF |
3912 | if (lock->lk_replay_owner) { |
3913 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 3914 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 3915 | } |
1da177e4 LT |
3916 | nfs4_unlock_state(); |
3917 | return status; | |
3918 | } | |
3919 | ||
55ef1274 BF |
3920 | /* |
3921 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
3922 | * so we do a temporary open here just to get an open file to pass to | |
3923 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
3924 | * inode operation.) | |
3925 | */ | |
3926 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
3927 | { | |
3928 | struct file *file; | |
3929 | int err; | |
3930 | ||
3931 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
3932 | if (err) | |
3933 | return err; | |
3934 | err = vfs_test_lock(file, lock); | |
3935 | nfsd_close(file); | |
3936 | return err; | |
3937 | } | |
3938 | ||
1da177e4 LT |
3939 | /* |
3940 | * LOCKT operation | |
3941 | */ | |
b37ad28b | 3942 | __be32 |
ca364317 BF |
3943 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3944 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
3945 | { |
3946 | struct inode *inode; | |
1da177e4 | 3947 | struct file_lock file_lock; |
fd85b817 | 3948 | int error; |
b37ad28b | 3949 | __be32 status; |
1da177e4 | 3950 | |
af558e33 | 3951 | if (locks_in_grace()) |
1da177e4 LT |
3952 | return nfserr_grace; |
3953 | ||
3954 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
3955 | return nfserr_inval; | |
3956 | ||
3957 | lockt->lt_stateowner = NULL; | |
3958 | nfs4_lock_state(); | |
3959 | ||
3960 | status = nfserr_stale_clientid; | |
60adfc50 | 3961 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 3962 | goto out; |
1da177e4 | 3963 | |
ca364317 | 3964 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 3965 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
3966 | if (status == nfserr_symlink) |
3967 | status = nfserr_inval; | |
3968 | goto out; | |
3969 | } | |
3970 | ||
ca364317 | 3971 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
3972 | locks_init_lock(&file_lock); |
3973 | switch (lockt->lt_type) { | |
3974 | case NFS4_READ_LT: | |
3975 | case NFS4_READW_LT: | |
3976 | file_lock.fl_type = F_RDLCK; | |
3977 | break; | |
3978 | case NFS4_WRITE_LT: | |
3979 | case NFS4_WRITEW_LT: | |
3980 | file_lock.fl_type = F_WRLCK; | |
3981 | break; | |
3982 | default: | |
2fdada03 | 3983 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
3984 | status = nfserr_inval; |
3985 | goto out; | |
3986 | } | |
3987 | ||
3988 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
3989 | &lockt->lt_clientid, &lockt->lt_owner); | |
3990 | if (lockt->lt_stateowner) | |
3991 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
3992 | file_lock.fl_pid = current->tgid; | |
3993 | file_lock.fl_flags = FL_POSIX; | |
3994 | ||
3995 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 3996 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
3997 | |
3998 | nfs4_transform_lock_offset(&file_lock); | |
3999 | ||
1da177e4 | 4000 | status = nfs_ok; |
55ef1274 | 4001 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
4002 | if (error) { |
4003 | status = nfserrno(error); | |
4004 | goto out; | |
4005 | } | |
9d6a8c5c | 4006 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 4007 | status = nfserr_denied; |
9d6a8c5c | 4008 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
4009 | } |
4010 | out: | |
4011 | nfs4_unlock_state(); | |
4012 | return status; | |
4013 | } | |
4014 | ||
b37ad28b | 4015 | __be32 |
ca364317 | 4016 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 4017 | struct nfsd4_locku *locku) |
1da177e4 LT |
4018 | { |
4019 | struct nfs4_stateid *stp; | |
4020 | struct file *filp = NULL; | |
4021 | struct file_lock file_lock; | |
b37ad28b | 4022 | __be32 status; |
b8dd7b9a | 4023 | int err; |
1da177e4 LT |
4024 | |
4025 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
4026 | (long long) locku->lu_offset, | |
4027 | (long long) locku->lu_length); | |
4028 | ||
4029 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
4030 | return nfserr_inval; | |
4031 | ||
4032 | nfs4_lock_state(); | |
4033 | ||
dd453dfd | 4034 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
4035 | locku->lu_seqid, |
4036 | &locku->lu_stateid, | |
f3362737 | 4037 | LOCK_STATE, |
1da177e4 LT |
4038 | &locku->lu_stateowner, &stp, NULL))) |
4039 | goto out; | |
4040 | ||
f9d7562f BF |
4041 | filp = find_any_file(stp->st_file); |
4042 | if (!filp) { | |
4043 | status = nfserr_lock_range; | |
4044 | goto out; | |
4045 | } | |
1da177e4 LT |
4046 | BUG_ON(!filp); |
4047 | locks_init_lock(&file_lock); | |
4048 | file_lock.fl_type = F_UNLCK; | |
4049 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
4050 | file_lock.fl_pid = current->tgid; | |
4051 | file_lock.fl_file = filp; | |
4052 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 4053 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
4054 | file_lock.fl_start = locku->lu_offset; |
4055 | ||
87df4de8 | 4056 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
4057 | nfs4_transform_lock_offset(&file_lock); |
4058 | ||
4059 | /* | |
4060 | * Try to unlock the file in the VFS. | |
4061 | */ | |
fd85b817 | 4062 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 4063 | if (err) { |
fd85b817 | 4064 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
4065 | goto out_nfserr; |
4066 | } | |
4067 | /* | |
4068 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
4069 | */ | |
4070 | update_stateid(&stp->st_stateid); | |
4071 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
4072 | ||
4073 | out: | |
f2327d9a | 4074 | if (locku->lu_stateowner) { |
1da177e4 | 4075 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 4076 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 4077 | } |
1da177e4 LT |
4078 | nfs4_unlock_state(); |
4079 | return status; | |
4080 | ||
4081 | out_nfserr: | |
b8dd7b9a | 4082 | status = nfserrno(err); |
1da177e4 LT |
4083 | goto out; |
4084 | } | |
4085 | ||
4086 | /* | |
4087 | * returns | |
4088 | * 1: locks held by lockowner | |
4089 | * 0: no locks held by lockowner | |
4090 | */ | |
4091 | static int | |
f9d7562f | 4092 | check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner) |
1da177e4 LT |
4093 | { |
4094 | struct file_lock **flpp; | |
f9d7562f | 4095 | struct inode *inode = filp->fi_inode; |
1da177e4 LT |
4096 | int status = 0; |
4097 | ||
b89f4321 | 4098 | lock_flocks(); |
1da177e4 | 4099 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
796dadfd | 4100 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
4101 | status = 1; |
4102 | goto out; | |
796dadfd | 4103 | } |
1da177e4 LT |
4104 | } |
4105 | out: | |
b89f4321 | 4106 | unlock_flocks(); |
1da177e4 LT |
4107 | return status; |
4108 | } | |
4109 | ||
b37ad28b | 4110 | __be32 |
b591480b BF |
4111 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
4112 | struct nfsd4_compound_state *cstate, | |
4113 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
4114 | { |
4115 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
4116 | struct nfs4_stateowner *sop; |
4117 | struct nfs4_stateid *stp; | |
1da177e4 | 4118 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
4119 | struct list_head matches; |
4120 | int i; | |
b37ad28b | 4121 | __be32 status; |
1da177e4 LT |
4122 | |
4123 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
4124 | clid->cl_boot, clid->cl_id); | |
4125 | ||
4126 | /* XXX check for lease expiration */ | |
4127 | ||
4128 | status = nfserr_stale_clientid; | |
849823c5 | 4129 | if (STALE_CLIENTID(clid)) |
1da177e4 | 4130 | return status; |
1da177e4 LT |
4131 | |
4132 | nfs4_lock_state(); | |
4133 | ||
3e9e3dbe N |
4134 | status = nfserr_locks_held; |
4135 | /* XXX: we're doing a linear search through all the lockowners. | |
4136 | * Yipes! For now we'll just hope clients aren't really using | |
4137 | * release_lockowner much, but eventually we have to fix these | |
4138 | * data structures. */ | |
4139 | INIT_LIST_HEAD(&matches); | |
4140 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4141 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 4142 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
4143 | continue; |
4144 | list_for_each_entry(stp, &sop->so_stateids, | |
4145 | st_perstateowner) { | |
f9d7562f | 4146 | if (check_for_locks(stp->st_file, sop)) |
3e9e3dbe N |
4147 | goto out; |
4148 | /* Note: so_perclient unused for lockowners, | |
4149 | * so it's OK to fool with here. */ | |
4150 | list_add(&sop->so_perclient, &matches); | |
4151 | } | |
1da177e4 | 4152 | } |
3e9e3dbe N |
4153 | } |
4154 | /* Clients probably won't expect us to return with some (but not all) | |
4155 | * of the lockowner state released; so don't release any until all | |
4156 | * have been checked. */ | |
4157 | status = nfs_ok; | |
0fa822e4 N |
4158 | while (!list_empty(&matches)) { |
4159 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
4160 | so_perclient); | |
4161 | /* unhash_stateowner deletes so_perclient only | |
4162 | * for openowners. */ | |
4163 | list_del(&sop->so_perclient); | |
f044ff83 | 4164 | release_lockowner(sop); |
1da177e4 LT |
4165 | } |
4166 | out: | |
4167 | nfs4_unlock_state(); | |
4168 | return status; | |
4169 | } | |
4170 | ||
4171 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 4172 | alloc_reclaim(void) |
1da177e4 | 4173 | { |
a55370a3 | 4174 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
4175 | } |
4176 | ||
c7b9a459 | 4177 | int |
a1bcecd2 | 4178 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
4179 | { |
4180 | unsigned int strhashval = clientstr_hashval(name); | |
4181 | struct nfs4_client *clp; | |
4182 | ||
e203d506 | 4183 | clp = find_confirmed_client_by_str(name, strhashval); |
c7b9a459 N |
4184 | return clp ? 1 : 0; |
4185 | } | |
4186 | ||
1da177e4 LT |
4187 | /* |
4188 | * failure => all reset bets are off, nfserr_no_grace... | |
4189 | */ | |
190e4fbf N |
4190 | int |
4191 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
4192 | { |
4193 | unsigned int strhashval; | |
4194 | struct nfs4_client_reclaim *crp = NULL; | |
4195 | ||
a55370a3 N |
4196 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
4197 | crp = alloc_reclaim(); | |
1da177e4 LT |
4198 | if (!crp) |
4199 | return 0; | |
a55370a3 | 4200 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
4201 | INIT_LIST_HEAD(&crp->cr_strhash); |
4202 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 4203 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
4204 | reclaim_str_hashtbl_size++; |
4205 | return 1; | |
4206 | } | |
4207 | ||
4208 | static void | |
4209 | nfs4_release_reclaim(void) | |
4210 | { | |
4211 | struct nfs4_client_reclaim *crp = NULL; | |
4212 | int i; | |
4213 | ||
1da177e4 LT |
4214 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4215 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
4216 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
4217 | struct nfs4_client_reclaim, cr_strhash); | |
4218 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
4219 | kfree(crp); |
4220 | reclaim_str_hashtbl_size--; | |
4221 | } | |
4222 | } | |
4223 | BUG_ON(reclaim_str_hashtbl_size); | |
4224 | } | |
4225 | ||
4226 | /* | |
4227 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 4228 | static struct nfs4_client_reclaim * |
1da177e4 LT |
4229 | nfs4_find_reclaim_client(clientid_t *clid) |
4230 | { | |
4231 | unsigned int strhashval; | |
4232 | struct nfs4_client *clp; | |
4233 | struct nfs4_client_reclaim *crp = NULL; | |
4234 | ||
4235 | ||
4236 | /* find clientid in conf_id_hashtbl */ | |
4237 | clp = find_confirmed_client(clid); | |
4238 | if (clp == NULL) | |
4239 | return NULL; | |
4240 | ||
a55370a3 N |
4241 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
4242 | clp->cl_name.len, clp->cl_name.data, | |
4243 | clp->cl_recdir); | |
1da177e4 LT |
4244 | |
4245 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 4246 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 4247 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 4248 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
4249 | return crp; |
4250 | } | |
4251 | } | |
4252 | return NULL; | |
4253 | } | |
4254 | ||
4255 | /* | |
4256 | * Called from OPEN. Look for clientid in reclaim list. | |
4257 | */ | |
b37ad28b | 4258 | __be32 |
1da177e4 LT |
4259 | nfs4_check_open_reclaim(clientid_t *clid) |
4260 | { | |
dfc83565 | 4261 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
4262 | } |
4263 | ||
ac4d8ff2 | 4264 | /* initialization to perform at module load time: */ |
1da177e4 | 4265 | |
e8ff2a84 | 4266 | int |
ac4d8ff2 | 4267 | nfs4_state_init(void) |
1da177e4 | 4268 | { |
e8ff2a84 | 4269 | int i, status; |
1da177e4 | 4270 | |
e8ff2a84 BF |
4271 | status = nfsd4_init_slabs(); |
4272 | if (status) | |
4273 | return status; | |
1da177e4 LT |
4274 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4275 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4276 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4277 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4278 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4279 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4280 | } |
5282fd72 ME |
4281 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4282 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4283 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4284 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4285 | } | |
4286 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
4287 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
4288 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
4289 | } | |
4290 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
4291 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
4292 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
4293 | } | |
4294 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4295 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4296 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4297 | } | |
1da177e4 | 4298 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4299 | INIT_LIST_HEAD(&close_lru); |
4300 | INIT_LIST_HEAD(&client_lru); | |
4301 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4302 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4303 | return 0; |
ac4d8ff2 N |
4304 | } |
4305 | ||
190e4fbf N |
4306 | static void |
4307 | nfsd4_load_reboot_recovery_data(void) | |
4308 | { | |
4309 | int status; | |
4310 | ||
0964a3d3 N |
4311 | nfs4_lock_state(); |
4312 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 4313 | status = nfsd4_recdir_load(); |
0964a3d3 | 4314 | nfs4_unlock_state(); |
190e4fbf N |
4315 | if (status) |
4316 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4317 | } | |
4318 | ||
c2f1a551 MS |
4319 | /* |
4320 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4321 | * client may quite reasonably hang on to a delegation as long as it has | |
4322 | * the inode cached. This becomes an obvious problem the first time a | |
4323 | * client's inode cache approaches the size of the server's total memory. | |
4324 | * | |
4325 | * For now we avoid this problem by imposing a hard limit on the number | |
4326 | * of delegations, which varies according to the server's memory size. | |
4327 | */ | |
4328 | static void | |
4329 | set_max_delegations(void) | |
4330 | { | |
4331 | /* | |
4332 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4333 | * estimates suggest that in the worst case (where every delegation | |
4334 | * is for a different inode), a delegation could take about 1.5K, | |
4335 | * giving a worst case usage of about 6% of memory. | |
4336 | */ | |
4337 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4338 | } | |
4339 | ||
ac4d8ff2 N |
4340 | /* initialization to perform when the nfsd service is started: */ |
4341 | ||
29ab23cc | 4342 | static int |
ac4d8ff2 N |
4343 | __nfs4_state_start(void) |
4344 | { | |
b5a1a81e BF |
4345 | int ret; |
4346 | ||
1da177e4 | 4347 | boot_time = get_seconds(); |
af558e33 | 4348 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 4349 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 4350 | nfsd4_grace); |
b5a1a81e BF |
4351 | ret = set_callback_cred(); |
4352 | if (ret) | |
4353 | return -ENOMEM; | |
58da282b | 4354 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
4355 | if (laundry_wq == NULL) |
4356 | return -ENOMEM; | |
b5a1a81e BF |
4357 | ret = nfsd4_create_callback_queue(); |
4358 | if (ret) | |
4359 | goto out_free_laundry; | |
e46b498c | 4360 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4361 | set_max_delegations(); |
b5a1a81e BF |
4362 | return 0; |
4363 | out_free_laundry: | |
4364 | destroy_workqueue(laundry_wq); | |
4365 | return ret; | |
1da177e4 LT |
4366 | } |
4367 | ||
29ab23cc | 4368 | int |
76a3550e | 4369 | nfs4_state_start(void) |
1da177e4 | 4370 | { |
190e4fbf | 4371 | nfsd4_load_reboot_recovery_data(); |
4ad9a344 | 4372 | return __nfs4_state_start(); |
1da177e4 LT |
4373 | } |
4374 | ||
1da177e4 LT |
4375 | static void |
4376 | __nfs4_state_shutdown(void) | |
4377 | { | |
4378 | int i; | |
4379 | struct nfs4_client *clp = NULL; | |
4380 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4381 | struct list_head *pos, *next, reaplist; |
4382 | ||
1da177e4 LT |
4383 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4384 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4385 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4386 | expire_client(clp); | |
4387 | } | |
4388 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4389 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4390 | expire_client(clp); | |
4391 | } | |
4392 | } | |
4393 | INIT_LIST_HEAD(&reaplist); | |
4394 | spin_lock(&recall_lock); | |
4395 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4396 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4397 | list_move(&dp->dl_recall_lru, &reaplist); | |
4398 | } | |
4399 | spin_unlock(&recall_lock); | |
4400 | list_for_each_safe(pos, next, &reaplist) { | |
4401 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4402 | list_del_init(&dp->dl_recall_lru); | |
4403 | unhash_delegation(dp); | |
4404 | } | |
4405 | ||
190e4fbf | 4406 | nfsd4_shutdown_recdir(); |
1da177e4 LT |
4407 | } |
4408 | ||
4409 | void | |
4410 | nfs4_state_shutdown(void) | |
4411 | { | |
afe2c511 | 4412 | cancel_delayed_work_sync(&laundromat_work); |
5e8d5c29 | 4413 | destroy_workqueue(laundry_wq); |
2c5e7615 | 4414 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4415 | nfs4_lock_state(); |
4416 | nfs4_release_reclaim(); | |
4417 | __nfs4_state_shutdown(); | |
1da177e4 | 4418 | nfs4_unlock_state(); |
c3935e30 | 4419 | nfsd4_destroy_callback_queue(); |
1da177e4 LT |
4420 | } |
4421 | ||
3dd98a3b JL |
4422 | /* |
4423 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4424 | * accessed when nfsd is starting. | |
4425 | */ | |
0964a3d3 N |
4426 | static void |
4427 | nfs4_set_recdir(char *recdir) | |
4428 | { | |
0964a3d3 | 4429 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4430 | } |
4431 | ||
4432 | /* | |
4433 | * Change the NFSv4 recovery directory to recdir. | |
4434 | */ | |
4435 | int | |
4436 | nfs4_reset_recoverydir(char *recdir) | |
4437 | { | |
4438 | int status; | |
a63bb996 | 4439 | struct path path; |
0964a3d3 | 4440 | |
a63bb996 | 4441 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4442 | if (status) |
4443 | return status; | |
4444 | status = -ENOTDIR; | |
a63bb996 | 4445 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4446 | nfs4_set_recdir(recdir); |
4447 | status = 0; | |
4448 | } | |
a63bb996 | 4449 | path_put(&path); |
0964a3d3 N |
4450 | return status; |
4451 | } | |
4452 | ||
3dd98a3b JL |
4453 | char * |
4454 | nfs4_recoverydir(void) | |
4455 | { | |
4456 | return user_recovery_dirname; | |
4457 | } |