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1da177e4 LT |
1 | /* |
2 | * linux/fs/nfsd/nfs4state.c | |
3 | * | |
4 | * Copyright (c) 2001 The Regents of the University of Michigan. | |
5 | * All rights reserved. | |
6 | * | |
7 | * Kendrick Smith <kmsmith@umich.edu> | |
8 | * Andy Adamson <kandros@umich.edu> | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions and the following disclaimer. | |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in the | |
18 | * documentation and/or other materials provided with the distribution. | |
19 | * 3. Neither the name of the University nor the names of its | |
20 | * contributors may be used to endorse or promote products derived | |
21 | * from this software without specific prior written permission. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
34 | * | |
35 | */ | |
36 | ||
37 | #include <linux/param.h> | |
38 | #include <linux/major.h> | |
39 | #include <linux/slab.h> | |
40 | ||
41 | #include <linux/sunrpc/svc.h> | |
42 | #include <linux/nfsd/nfsd.h> | |
43 | #include <linux/nfsd/cache.h> | |
aceaf78d | 44 | #include <linux/file.h> |
1da177e4 LT |
45 | #include <linux/mount.h> |
46 | #include <linux/workqueue.h> | |
47 | #include <linux/smp_lock.h> | |
48 | #include <linux/kthread.h> | |
49 | #include <linux/nfs4.h> | |
50 | #include <linux/nfsd/state.h> | |
51 | #include <linux/nfsd/xdr4.h> | |
0964a3d3 | 52 | #include <linux/namei.h> |
c2f1a551 | 53 | #include <linux/swap.h> |
353ab6e9 | 54 | #include <linux/mutex.h> |
fd85b817 | 55 | #include <linux/lockd/bind.h> |
9a8db97e | 56 | #include <linux/module.h> |
68e76ad0 | 57 | #include <linux/sunrpc/svcauth_gss.h> |
1da177e4 LT |
58 | |
59 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
60 | ||
61 | /* Globals */ | |
62 | static time_t lease_time = 90; /* default lease time */ | |
d99a05ad | 63 | static time_t user_lease_time = 90; |
fd39ca9a | 64 | static time_t boot_time; |
1da177e4 LT |
65 | static u32 current_ownerid = 1; |
66 | static u32 current_fileid = 1; | |
67 | static u32 current_delegid = 1; | |
68 | static u32 nfs4_init; | |
fd39ca9a N |
69 | static stateid_t zerostateid; /* bits all 0 */ |
70 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 71 | static u64 current_sessionid = 1; |
fd39ca9a N |
72 | |
73 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
74 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 75 | |
1da177e4 | 76 | /* forward declarations */ |
fd39ca9a | 77 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 | 78 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
0964a3d3 N |
79 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
80 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 | 81 | |
8b671b80 BF |
82 | /* Locking: */ |
83 | ||
84 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 85 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 86 | |
8b671b80 BF |
87 | /* |
88 | * Currently used for the del_recall_lru and file hash table. In an | |
89 | * effort to decrease the scope of the client_mutex, this spinlock may | |
90 | * eventually cover more: | |
91 | */ | |
92 | static DEFINE_SPINLOCK(recall_lock); | |
93 | ||
e18b890b CL |
94 | static struct kmem_cache *stateowner_slab = NULL; |
95 | static struct kmem_cache *file_slab = NULL; | |
96 | static struct kmem_cache *stateid_slab = NULL; | |
97 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 98 | |
1da177e4 LT |
99 | void |
100 | nfs4_lock_state(void) | |
101 | { | |
353ab6e9 | 102 | mutex_lock(&client_mutex); |
1da177e4 LT |
103 | } |
104 | ||
105 | void | |
106 | nfs4_unlock_state(void) | |
107 | { | |
353ab6e9 | 108 | mutex_unlock(&client_mutex); |
1da177e4 LT |
109 | } |
110 | ||
111 | static inline u32 | |
112 | opaque_hashval(const void *ptr, int nbytes) | |
113 | { | |
114 | unsigned char *cptr = (unsigned char *) ptr; | |
115 | ||
116 | u32 x = 0; | |
117 | while (nbytes--) { | |
118 | x *= 37; | |
119 | x += *cptr++; | |
120 | } | |
121 | return x; | |
122 | } | |
123 | ||
1da177e4 LT |
124 | static struct list_head del_recall_lru; |
125 | ||
13cd2184 N |
126 | static inline void |
127 | put_nfs4_file(struct nfs4_file *fi) | |
128 | { | |
8b671b80 BF |
129 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
130 | list_del(&fi->fi_hash); | |
131 | spin_unlock(&recall_lock); | |
132 | iput(fi->fi_inode); | |
133 | kmem_cache_free(file_slab, fi); | |
134 | } | |
13cd2184 N |
135 | } |
136 | ||
137 | static inline void | |
138 | get_nfs4_file(struct nfs4_file *fi) | |
139 | { | |
8b671b80 | 140 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
141 | } |
142 | ||
ef0f3390 | 143 | static int num_delegations; |
c2f1a551 | 144 | unsigned int max_delegations; |
ef0f3390 N |
145 | |
146 | /* | |
147 | * Open owner state (share locks) | |
148 | */ | |
149 | ||
150 | /* hash tables for nfs4_stateowner */ | |
151 | #define OWNER_HASH_BITS 8 | |
152 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
153 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
154 | ||
155 | #define ownerid_hashval(id) \ | |
156 | ((id) & OWNER_HASH_MASK) | |
157 | #define ownerstr_hashval(clientid, ownername) \ | |
158 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
159 | ||
160 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
161 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
162 | ||
163 | /* hash table for nfs4_file */ | |
164 | #define FILE_HASH_BITS 8 | |
165 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
166 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
167 | /* hash table for (open)nfs4_stateid */ | |
168 | #define STATEID_HASH_BITS 10 | |
169 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
170 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
171 | ||
172 | #define file_hashval(x) \ | |
173 | hash_ptr(x, FILE_HASH_BITS) | |
174 | #define stateid_hashval(owner_id, file_id) \ | |
175 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
176 | ||
177 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
178 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
179 | ||
1da177e4 LT |
180 | static struct nfs4_delegation * |
181 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
182 | { | |
183 | struct nfs4_delegation *dp; | |
184 | struct nfs4_file *fp = stp->st_file; | |
185 | struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; | |
186 | ||
187 | dprintk("NFSD alloc_init_deleg\n"); | |
47f9940c MS |
188 | if (fp->fi_had_conflict) |
189 | return NULL; | |
c2f1a551 | 190 | if (num_delegations > max_delegations) |
ef0f3390 | 191 | return NULL; |
5b2d21c1 N |
192 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
193 | if (dp == NULL) | |
1da177e4 | 194 | return dp; |
ef0f3390 | 195 | num_delegations++; |
ea1da636 N |
196 | INIT_LIST_HEAD(&dp->dl_perfile); |
197 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
198 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
199 | dp->dl_client = clp; | |
13cd2184 | 200 | get_nfs4_file(fp); |
1da177e4 LT |
201 | dp->dl_file = fp; |
202 | dp->dl_flock = NULL; | |
203 | get_file(stp->st_vfs_file); | |
204 | dp->dl_vfs_file = stp->st_vfs_file; | |
205 | dp->dl_type = type; | |
206 | dp->dl_recall.cbr_dp = NULL; | |
207 | dp->dl_recall.cbr_ident = cb->cb_ident; | |
208 | dp->dl_recall.cbr_trunc = 0; | |
209 | dp->dl_stateid.si_boot = boot_time; | |
210 | dp->dl_stateid.si_stateownerid = current_delegid++; | |
211 | dp->dl_stateid.si_fileid = 0; | |
212 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 213 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
214 | dp->dl_time = 0; |
215 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
216 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
217 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
1da177e4 LT |
218 | return dp; |
219 | } | |
220 | ||
221 | void | |
222 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
223 | { | |
224 | if (atomic_dec_and_test(&dp->dl_count)) { | |
225 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 226 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 227 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 228 | num_delegations--; |
1da177e4 LT |
229 | } |
230 | } | |
231 | ||
232 | /* Remove the associated file_lock first, then remove the delegation. | |
233 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
234 | * the i_flock list, eventually calling nfsd's lock_manager | |
235 | * fl_release_callback. | |
236 | */ | |
237 | static void | |
238 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
239 | { | |
240 | struct file *filp = dp->dl_vfs_file; | |
241 | ||
242 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
243 | dp->dl_vfs_file = NULL; | |
244 | /* The following nfsd_close may not actually close the file, | |
245 | * but we want to remove the lease in any case. */ | |
c907132d | 246 | if (dp->dl_flock) |
a9933cea | 247 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
1da177e4 | 248 | nfsd_close(filp); |
1da177e4 LT |
249 | } |
250 | ||
251 | /* Called under the state lock. */ | |
252 | static void | |
253 | unhash_delegation(struct nfs4_delegation *dp) | |
254 | { | |
ea1da636 N |
255 | list_del_init(&dp->dl_perfile); |
256 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
257 | spin_lock(&recall_lock); |
258 | list_del_init(&dp->dl_recall_lru); | |
259 | spin_unlock(&recall_lock); | |
260 | nfs4_close_delegation(dp); | |
261 | nfs4_put_delegation(dp); | |
262 | } | |
263 | ||
264 | /* | |
265 | * SETCLIENTID state | |
266 | */ | |
267 | ||
268 | /* Hash tables for nfs4_clientid state */ | |
269 | #define CLIENT_HASH_BITS 4 | |
270 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
271 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
272 | ||
273 | #define clientid_hashval(id) \ | |
274 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
275 | #define clientstr_hashval(name) \ |
276 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
277 | /* |
278 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
279 | * used in reboot/reset lease grace period processing | |
280 | * | |
281 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
282 | * setclientid_confirmed info. | |
283 | * | |
284 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
285 | * setclientid info. | |
286 | * | |
287 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
288 | * for lease renewal. | |
289 | * | |
290 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
291 | * for last close replay. | |
292 | */ | |
293 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
294 | static int reclaim_str_hashtbl_size = 0; | |
295 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
296 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
297 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
298 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
299 | static struct list_head client_lru; | |
300 | static struct list_head close_lru; | |
301 | ||
2283963f BF |
302 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
303 | { | |
304 | list_del(&stp->st_hash); | |
305 | list_del(&stp->st_perfile); | |
306 | list_del(&stp->st_perstateowner); | |
307 | } | |
308 | ||
309 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
310 | { | |
311 | put_nfs4_file(stp->st_file); | |
312 | kmem_cache_free(stateid_slab, stp); | |
313 | } | |
314 | ||
315 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
316 | { | |
317 | unhash_generic_stateid(stp); | |
318 | locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); | |
319 | free_generic_stateid(stp); | |
320 | } | |
321 | ||
f044ff83 BF |
322 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
323 | { | |
324 | struct nfs4_stateid *stp; | |
325 | ||
326 | list_del(&sop->so_idhash); | |
327 | list_del(&sop->so_strhash); | |
328 | list_del(&sop->so_perstateid); | |
329 | while (!list_empty(&sop->so_stateids)) { | |
330 | stp = list_first_entry(&sop->so_stateids, | |
331 | struct nfs4_stateid, st_perstateowner); | |
332 | release_lock_stateid(stp); | |
333 | } | |
334 | } | |
335 | ||
336 | static void release_lockowner(struct nfs4_stateowner *sop) | |
337 | { | |
338 | unhash_lockowner(sop); | |
339 | nfs4_put_stateowner(sop); | |
340 | } | |
341 | ||
f1d110ca BF |
342 | static void |
343 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
344 | { | |
345 | struct nfs4_stateowner *lock_sop; | |
346 | ||
347 | while (!list_empty(&open_stp->st_lockowners)) { | |
348 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
349 | struct nfs4_stateowner, so_perstateid); | |
350 | /* list_del(&open_stp->st_lockowners); */ | |
351 | BUG_ON(lock_sop->so_is_open_owner); | |
f044ff83 | 352 | release_lockowner(lock_sop); |
f1d110ca BF |
353 | } |
354 | } | |
355 | ||
2283963f BF |
356 | static void release_open_stateid(struct nfs4_stateid *stp) |
357 | { | |
358 | unhash_generic_stateid(stp); | |
359 | release_stateid_lockowners(stp); | |
360 | nfsd_close(stp->st_vfs_file); | |
361 | free_generic_stateid(stp); | |
362 | } | |
363 | ||
f044ff83 | 364 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
365 | { |
366 | struct nfs4_stateid *stp; | |
367 | ||
368 | list_del(&sop->so_idhash); | |
369 | list_del(&sop->so_strhash); | |
f044ff83 BF |
370 | list_del(&sop->so_perclient); |
371 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 372 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
373 | stp = list_first_entry(&sop->so_stateids, |
374 | struct nfs4_stateid, st_perstateowner); | |
375 | release_open_stateid(stp); | |
f1d110ca BF |
376 | } |
377 | } | |
378 | ||
f044ff83 | 379 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 380 | { |
f044ff83 | 381 | unhash_openowner(sop); |
f1d110ca BF |
382 | list_del(&sop->so_close_lru); |
383 | nfs4_put_stateowner(sop); | |
384 | } | |
385 | ||
5282fd72 ME |
386 | static DEFINE_SPINLOCK(sessionid_lock); |
387 | #define SESSION_HASH_SIZE 512 | |
388 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
389 | ||
390 | static inline int | |
391 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
392 | { | |
393 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
394 | ||
395 | return sid->sequence % SESSION_HASH_SIZE; | |
396 | } | |
397 | ||
398 | static inline void | |
399 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
400 | { | |
401 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
402 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
403 | } | |
404 | ||
ec6b5d7b AA |
405 | static void |
406 | gen_sessionid(struct nfsd4_session *ses) | |
407 | { | |
408 | struct nfs4_client *clp = ses->se_client; | |
409 | struct nfsd4_sessionid *sid; | |
410 | ||
411 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
412 | sid->clientid = clp->cl_clientid; | |
413 | sid->sequence = current_sessionid++; | |
414 | sid->reserved = 0; | |
415 | } | |
416 | ||
417 | /* | |
418 | * Give the client the number of slots it requests bound by | |
419 | * NFSD_MAX_SLOTS_PER_SESSION and by sv_drc_max_pages. | |
420 | * | |
421 | * If we run out of pages (sv_drc_pages_used == sv_drc_max_pages) we | |
422 | * should (up to a point) re-negotiate active sessions and reduce their | |
423 | * slot usage to make rooom for new connections. For now we just fail the | |
424 | * create session. | |
425 | */ | |
426 | static int set_forechannel_maxreqs(struct nfsd4_channel_attrs *fchan) | |
427 | { | |
428 | int status = 0, np = fchan->maxreqs * NFSD_PAGES_PER_SLOT; | |
429 | ||
430 | spin_lock(&nfsd_serv->sv_lock); | |
431 | if (np + nfsd_serv->sv_drc_pages_used > nfsd_serv->sv_drc_max_pages) | |
432 | np = nfsd_serv->sv_drc_max_pages - nfsd_serv->sv_drc_pages_used; | |
433 | nfsd_serv->sv_drc_pages_used += np; | |
434 | spin_unlock(&nfsd_serv->sv_lock); | |
435 | ||
436 | if (np <= 0) { | |
437 | status = nfserr_resource; | |
438 | fchan->maxreqs = 0; | |
439 | } else | |
440 | fchan->maxreqs = np / NFSD_PAGES_PER_SLOT; | |
441 | ||
442 | return status; | |
443 | } | |
444 | ||
445 | /* | |
446 | * fchan holds the client values on input, and the server values on output | |
447 | */ | |
448 | static int init_forechannel_attrs(struct svc_rqst *rqstp, | |
449 | struct nfsd4_session *session, | |
450 | struct nfsd4_channel_attrs *fchan) | |
451 | { | |
452 | int status = 0; | |
453 | __u32 maxcount = svc_max_payload(rqstp); | |
454 | ||
455 | /* headerpadsz set to zero in encode routine */ | |
456 | ||
457 | /* Use the client's max request and max response size if possible */ | |
458 | if (fchan->maxreq_sz > maxcount) | |
459 | fchan->maxreq_sz = maxcount; | |
460 | session->se_fmaxreq_sz = fchan->maxreq_sz; | |
461 | ||
462 | if (fchan->maxresp_sz > maxcount) | |
463 | fchan->maxresp_sz = maxcount; | |
464 | session->se_fmaxresp_sz = fchan->maxresp_sz; | |
465 | ||
466 | /* Set the max response cached size our default which is | |
467 | * a multiple of PAGE_SIZE and small */ | |
468 | session->se_fmaxresp_cached = NFSD_PAGES_PER_SLOT * PAGE_SIZE; | |
469 | fchan->maxresp_cached = session->se_fmaxresp_cached; | |
470 | ||
471 | /* Use the client's maxops if possible */ | |
472 | if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) | |
473 | fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; | |
474 | session->se_fmaxops = fchan->maxops; | |
475 | ||
476 | /* try to use the client requested number of slots */ | |
477 | if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) | |
478 | fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; | |
479 | ||
480 | /* FIXME: Error means no more DRC pages so the server should | |
481 | * recover pages from existing sessions. For now fail session | |
482 | * creation. | |
483 | */ | |
484 | status = set_forechannel_maxreqs(fchan); | |
485 | ||
486 | session->se_fnumslots = fchan->maxreqs; | |
487 | return status; | |
488 | } | |
489 | ||
490 | static int | |
491 | alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, | |
492 | struct nfsd4_create_session *cses) | |
493 | { | |
494 | struct nfsd4_session *new, tmp; | |
495 | int idx, status = nfserr_resource, slotsize; | |
496 | ||
497 | memset(&tmp, 0, sizeof(tmp)); | |
498 | ||
499 | /* FIXME: For now, we just accept the client back channel attributes. */ | |
500 | status = init_forechannel_attrs(rqstp, &tmp, &cses->fore_channel); | |
501 | if (status) | |
502 | goto out; | |
503 | ||
504 | /* allocate struct nfsd4_session and slot table in one piece */ | |
505 | slotsize = tmp.se_fnumslots * sizeof(struct nfsd4_slot); | |
506 | new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); | |
507 | if (!new) | |
508 | goto out; | |
509 | ||
510 | memcpy(new, &tmp, sizeof(*new)); | |
511 | ||
512 | new->se_client = clp; | |
513 | gen_sessionid(new); | |
514 | idx = hash_sessionid(&new->se_sessionid); | |
515 | memcpy(clp->cl_sessionid.data, new->se_sessionid.data, | |
516 | NFS4_MAX_SESSIONID_LEN); | |
517 | ||
518 | new->se_flags = cses->flags; | |
519 | kref_init(&new->se_ref); | |
520 | spin_lock(&sessionid_lock); | |
521 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); | |
522 | list_add(&new->se_perclnt, &clp->cl_sessions); | |
523 | spin_unlock(&sessionid_lock); | |
524 | ||
525 | status = nfs_ok; | |
526 | out: | |
527 | return status; | |
528 | } | |
529 | ||
5282fd72 ME |
530 | /* caller must hold sessionid_lock */ |
531 | static struct nfsd4_session * | |
532 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
533 | { | |
534 | struct nfsd4_session *elem; | |
535 | int idx; | |
536 | ||
537 | dump_sessionid(__func__, sessionid); | |
538 | idx = hash_sessionid(sessionid); | |
539 | dprintk("%s: idx is %d\n", __func__, idx); | |
540 | /* Search in the appropriate list */ | |
541 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
542 | dump_sessionid("list traversal", &elem->se_sessionid); | |
543 | if (!memcmp(elem->se_sessionid.data, sessionid->data, | |
544 | NFS4_MAX_SESSIONID_LEN)) { | |
545 | return elem; | |
546 | } | |
547 | } | |
548 | ||
549 | dprintk("%s: session not found\n", __func__); | |
550 | return NULL; | |
551 | } | |
552 | ||
553 | /* caller must hold sessionid_lock */ | |
7116ed6b | 554 | static void |
5282fd72 | 555 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
556 | { |
557 | list_del(&ses->se_hash); | |
558 | list_del(&ses->se_perclnt); | |
5282fd72 ME |
559 | } |
560 | ||
561 | static void | |
562 | release_session(struct nfsd4_session *ses) | |
563 | { | |
564 | spin_lock(&sessionid_lock); | |
565 | unhash_session(ses); | |
566 | spin_unlock(&sessionid_lock); | |
7116ed6b AA |
567 | nfsd4_put_session(ses); |
568 | } | |
569 | ||
14778a13 AA |
570 | static void nfsd4_release_respages(struct page **respages, short resused); |
571 | ||
7116ed6b AA |
572 | void |
573 | free_session(struct kref *kref) | |
574 | { | |
575 | struct nfsd4_session *ses; | |
14778a13 | 576 | int i; |
7116ed6b AA |
577 | |
578 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
14778a13 AA |
579 | for (i = 0; i < ses->se_fnumslots; i++) { |
580 | struct nfsd4_cache_entry *e = &ses->se_slots[i].sl_cache_entry; | |
581 | nfsd4_release_respages(e->ce_respages, e->ce_resused); | |
582 | } | |
7116ed6b AA |
583 | kfree(ses->se_slots); |
584 | kfree(ses); | |
585 | } | |
586 | ||
1da177e4 LT |
587 | static inline void |
588 | renew_client(struct nfs4_client *clp) | |
589 | { | |
590 | /* | |
591 | * Move client to the end to the LRU list. | |
592 | */ | |
593 | dprintk("renewing client (clientid %08x/%08x)\n", | |
594 | clp->cl_clientid.cl_boot, | |
595 | clp->cl_clientid.cl_id); | |
596 | list_move_tail(&clp->cl_lru, &client_lru); | |
597 | clp->cl_time = get_seconds(); | |
598 | } | |
599 | ||
600 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
601 | static int | |
602 | STALE_CLIENTID(clientid_t *clid) | |
603 | { | |
604 | if (clid->cl_boot == boot_time) | |
605 | return 0; | |
60adfc50 AA |
606 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
607 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
608 | return 1; |
609 | } | |
610 | ||
611 | /* | |
612 | * XXX Should we use a slab cache ? | |
613 | * This type of memory management is somewhat inefficient, but we use it | |
614 | * anyway since SETCLIENTID is not a common operation. | |
615 | */ | |
35bba9a3 | 616 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
617 | { |
618 | struct nfs4_client *clp; | |
619 | ||
35bba9a3 BF |
620 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
621 | if (clp == NULL) | |
622 | return NULL; | |
623 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
624 | if (clp->cl_name.data == NULL) { | |
625 | kfree(clp); | |
626 | return NULL; | |
1da177e4 | 627 | } |
35bba9a3 BF |
628 | memcpy(clp->cl_name.data, name.data, name.len); |
629 | clp->cl_name.len = name.len; | |
1da177e4 LT |
630 | return clp; |
631 | } | |
632 | ||
1b1a9b31 BF |
633 | static void |
634 | shutdown_callback_client(struct nfs4_client *clp) | |
635 | { | |
636 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; | |
637 | ||
1b1a9b31 | 638 | if (clnt) { |
404ec117 BF |
639 | /* |
640 | * Callback threads take a reference on the client, so there | |
641 | * should be no outstanding callbacks at this point. | |
642 | */ | |
1b1a9b31 BF |
643 | clp->cl_callback.cb_client = NULL; |
644 | rpc_shutdown_client(clnt); | |
645 | } | |
646 | } | |
647 | ||
1da177e4 LT |
648 | static inline void |
649 | free_client(struct nfs4_client *clp) | |
650 | { | |
1b1a9b31 | 651 | shutdown_callback_client(clp); |
38eb76a5 AA |
652 | nfsd4_release_respages(clp->cl_slot.sl_cache_entry.ce_respages, |
653 | clp->cl_slot.sl_cache_entry.ce_resused); | |
1da177e4 LT |
654 | if (clp->cl_cred.cr_group_info) |
655 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 656 | kfree(clp->cl_principal); |
1da177e4 LT |
657 | kfree(clp->cl_name.data); |
658 | kfree(clp); | |
659 | } | |
660 | ||
661 | void | |
662 | put_nfs4_client(struct nfs4_client *clp) | |
663 | { | |
664 | if (atomic_dec_and_test(&clp->cl_count)) | |
665 | free_client(clp); | |
666 | } | |
667 | ||
668 | static void | |
669 | expire_client(struct nfs4_client *clp) | |
670 | { | |
671 | struct nfs4_stateowner *sop; | |
672 | struct nfs4_delegation *dp; | |
1da177e4 LT |
673 | struct list_head reaplist; |
674 | ||
675 | dprintk("NFSD: expire_client cl_count %d\n", | |
676 | atomic_read(&clp->cl_count)); | |
677 | ||
1da177e4 LT |
678 | INIT_LIST_HEAD(&reaplist); |
679 | spin_lock(&recall_lock); | |
ea1da636 N |
680 | while (!list_empty(&clp->cl_delegations)) { |
681 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
682 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
683 | dp->dl_flock); | |
ea1da636 | 684 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
685 | list_move(&dp->dl_recall_lru, &reaplist); |
686 | } | |
687 | spin_unlock(&recall_lock); | |
688 | while (!list_empty(&reaplist)) { | |
689 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
690 | list_del_init(&dp->dl_recall_lru); | |
691 | unhash_delegation(dp); | |
692 | } | |
693 | list_del(&clp->cl_idhash); | |
694 | list_del(&clp->cl_strhash); | |
695 | list_del(&clp->cl_lru); | |
ea1da636 N |
696 | while (!list_empty(&clp->cl_openowners)) { |
697 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 698 | release_openowner(sop); |
1da177e4 | 699 | } |
c4bf7868 ME |
700 | while (!list_empty(&clp->cl_sessions)) { |
701 | struct nfsd4_session *ses; | |
702 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
703 | se_perclnt); | |
704 | release_session(ses); | |
705 | } | |
1da177e4 LT |
706 | put_nfs4_client(clp); |
707 | } | |
708 | ||
35bba9a3 BF |
709 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) |
710 | { | |
1da177e4 LT |
711 | struct nfs4_client *clp; |
712 | ||
35bba9a3 BF |
713 | clp = alloc_client(name); |
714 | if (clp == NULL) | |
715 | return NULL; | |
a55370a3 | 716 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
1da177e4 LT |
717 | atomic_set(&clp->cl_count, 1); |
718 | atomic_set(&clp->cl_callback.cb_set, 0); | |
1da177e4 LT |
719 | INIT_LIST_HEAD(&clp->cl_idhash); |
720 | INIT_LIST_HEAD(&clp->cl_strhash); | |
ea1da636 N |
721 | INIT_LIST_HEAD(&clp->cl_openowners); |
722 | INIT_LIST_HEAD(&clp->cl_delegations); | |
9fb87070 | 723 | INIT_LIST_HEAD(&clp->cl_sessions); |
1da177e4 | 724 | INIT_LIST_HEAD(&clp->cl_lru); |
1da177e4 LT |
725 | return clp; |
726 | } | |
727 | ||
35bba9a3 BF |
728 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
729 | { | |
730 | memcpy(target->cl_verifier.data, source->data, | |
731 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
732 | } |
733 | ||
35bba9a3 BF |
734 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
735 | { | |
1da177e4 LT |
736 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
737 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
738 | } | |
739 | ||
35bba9a3 BF |
740 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
741 | { | |
1da177e4 LT |
742 | target->cr_uid = source->cr_uid; |
743 | target->cr_gid = source->cr_gid; | |
744 | target->cr_group_info = source->cr_group_info; | |
745 | get_group_info(target->cr_group_info); | |
746 | } | |
747 | ||
35bba9a3 | 748 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 749 | { |
a55370a3 | 750 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
751 | } |
752 | ||
753 | static int | |
599e0a22 BF |
754 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
755 | { | |
756 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
757 | } |
758 | ||
759 | static int | |
599e0a22 BF |
760 | same_clid(clientid_t *cl1, clientid_t *cl2) |
761 | { | |
762 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
763 | } |
764 | ||
765 | /* XXX what about NGROUP */ | |
766 | static int | |
599e0a22 BF |
767 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
768 | { | |
769 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
770 | } |
771 | ||
5ec7b46c BF |
772 | static void gen_clid(struct nfs4_client *clp) |
773 | { | |
774 | static u32 current_clientid = 1; | |
775 | ||
1da177e4 LT |
776 | clp->cl_clientid.cl_boot = boot_time; |
777 | clp->cl_clientid.cl_id = current_clientid++; | |
778 | } | |
779 | ||
deda2faa BF |
780 | static void gen_confirm(struct nfs4_client *clp) |
781 | { | |
782 | static u32 i; | |
783 | u32 *p; | |
1da177e4 | 784 | |
1da177e4 | 785 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
786 | *p++ = get_seconds(); |
787 | *p++ = i++; | |
1da177e4 LT |
788 | } |
789 | ||
35bba9a3 BF |
790 | static int check_name(struct xdr_netobj name) |
791 | { | |
1da177e4 LT |
792 | if (name.len == 0) |
793 | return 0; | |
794 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 795 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
796 | return 0; |
797 | } | |
798 | return 1; | |
799 | } | |
800 | ||
fd39ca9a | 801 | static void |
1da177e4 LT |
802 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
803 | { | |
804 | unsigned int idhashval; | |
805 | ||
806 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
807 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
808 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
809 | list_add_tail(&clp->cl_lru, &client_lru); | |
810 | clp->cl_time = get_seconds(); | |
811 | } | |
812 | ||
fd39ca9a | 813 | static void |
1da177e4 LT |
814 | move_to_confirmed(struct nfs4_client *clp) |
815 | { | |
816 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
817 | unsigned int strhashval; | |
818 | ||
819 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
820 | list_del_init(&clp->cl_strhash); | |
f116629d | 821 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 822 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
823 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
824 | renew_client(clp); | |
825 | } | |
826 | ||
827 | static struct nfs4_client * | |
828 | find_confirmed_client(clientid_t *clid) | |
829 | { | |
830 | struct nfs4_client *clp; | |
831 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
832 | ||
833 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 834 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
835 | return clp; |
836 | } | |
837 | return NULL; | |
838 | } | |
839 | ||
840 | static struct nfs4_client * | |
841 | find_unconfirmed_client(clientid_t *clid) | |
842 | { | |
843 | struct nfs4_client *clp; | |
844 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
845 | ||
846 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 847 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
848 | return clp; |
849 | } | |
850 | return NULL; | |
851 | } | |
852 | ||
a1bcecd2 AA |
853 | /* |
854 | * Return 1 iff clp's clientid establishment method matches the use_exchange_id | |
855 | * parameter. Matching is based on the fact the at least one of the | |
856 | * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 | |
857 | * | |
858 | * FIXME: we need to unify the clientid namespaces for nfsv4.x | |
859 | * and correctly deal with client upgrade/downgrade in EXCHANGE_ID | |
860 | * and SET_CLIENTID{,_CONFIRM} | |
861 | */ | |
862 | static inline int | |
863 | match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) | |
864 | { | |
865 | bool has_exchange_flags = (clp->cl_exchange_flags != 0); | |
866 | return use_exchange_id == has_exchange_flags; | |
867 | } | |
868 | ||
28ce6054 | 869 | static struct nfs4_client * |
a1bcecd2 AA |
870 | find_confirmed_client_by_str(const char *dname, unsigned int hashval, |
871 | bool use_exchange_id) | |
28ce6054 N |
872 | { |
873 | struct nfs4_client *clp; | |
874 | ||
875 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
876 | if (same_name(clp->cl_recdir, dname) && |
877 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
878 | return clp; |
879 | } | |
880 | return NULL; | |
881 | } | |
882 | ||
883 | static struct nfs4_client * | |
a1bcecd2 AA |
884 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, |
885 | bool use_exchange_id) | |
28ce6054 N |
886 | { |
887 | struct nfs4_client *clp; | |
888 | ||
889 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
890 | if (same_name(clp->cl_recdir, dname) && |
891 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
892 | return clp; |
893 | } | |
894 | return NULL; | |
895 | } | |
896 | ||
1da177e4 LT |
897 | /* a helper function for parse_callback */ |
898 | static int | |
899 | parse_octet(unsigned int *lenp, char **addrp) | |
900 | { | |
901 | unsigned int len = *lenp; | |
902 | char *p = *addrp; | |
903 | int n = -1; | |
904 | char c; | |
905 | ||
906 | for (;;) { | |
907 | if (!len) | |
908 | break; | |
909 | len--; | |
910 | c = *p++; | |
911 | if (c == '.') | |
912 | break; | |
913 | if ((c < '0') || (c > '9')) { | |
914 | n = -1; | |
915 | break; | |
916 | } | |
917 | if (n < 0) | |
918 | n = 0; | |
919 | n = (n * 10) + (c - '0'); | |
920 | if (n > 255) { | |
921 | n = -1; | |
922 | break; | |
923 | } | |
924 | } | |
925 | *lenp = len; | |
926 | *addrp = p; | |
927 | return n; | |
928 | } | |
929 | ||
930 | /* parse and set the setclientid ipv4 callback address */ | |
fd39ca9a | 931 | static int |
1da177e4 LT |
932 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
933 | { | |
934 | int temp = 0; | |
935 | u32 cbaddr = 0; | |
936 | u16 cbport = 0; | |
937 | u32 addrlen = addr_len; | |
938 | char *addr = addr_val; | |
939 | int i, shift; | |
940 | ||
941 | /* ipaddress */ | |
942 | shift = 24; | |
943 | for(i = 4; i > 0 ; i--) { | |
944 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
945 | return 0; | |
946 | } | |
947 | cbaddr |= (temp << shift); | |
948 | if (shift > 0) | |
949 | shift -= 8; | |
950 | } | |
951 | *cbaddrp = cbaddr; | |
952 | ||
953 | /* port */ | |
954 | shift = 8; | |
955 | for(i = 2; i > 0 ; i--) { | |
956 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
957 | return 0; | |
958 | } | |
959 | cbport |= (temp << shift); | |
960 | if (shift > 0) | |
961 | shift -= 8; | |
962 | } | |
963 | *cbportp = cbport; | |
964 | return 1; | |
965 | } | |
966 | ||
fd39ca9a | 967 | static void |
1da177e4 LT |
968 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
969 | { | |
970 | struct nfs4_callback *cb = &clp->cl_callback; | |
971 | ||
972 | /* Currently, we only support tcp for the callback channel */ | |
973 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) | |
974 | goto out_err; | |
975 | ||
976 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, | |
977 | &cb->cb_addr, &cb->cb_port))) | |
978 | goto out_err; | |
979 | cb->cb_prog = se->se_callback_prog; | |
980 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
981 | return; |
982 | out_err: | |
849823c5 | 983 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
984 | "will not receive delegations\n", |
985 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
986 | ||
1da177e4 LT |
987 | return; |
988 | } | |
989 | ||
074fe897 AA |
990 | void |
991 | nfsd4_set_statp(struct svc_rqst *rqstp, __be32 *statp) | |
992 | { | |
993 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
994 | ||
995 | resp->cstate.statp = statp; | |
996 | } | |
997 | ||
998 | /* | |
999 | * Dereference the result pages. | |
1000 | */ | |
1001 | static void | |
1002 | nfsd4_release_respages(struct page **respages, short resused) | |
1003 | { | |
1004 | int i; | |
1005 | ||
1006 | dprintk("--> %s\n", __func__); | |
1007 | for (i = 0; i < resused; i++) { | |
1008 | if (!respages[i]) | |
1009 | continue; | |
1010 | put_page(respages[i]); | |
1011 | respages[i] = NULL; | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | static void | |
1016 | nfsd4_copy_pages(struct page **topages, struct page **frompages, short count) | |
1017 | { | |
1018 | int i; | |
1019 | ||
1020 | for (i = 0; i < count; i++) { | |
1021 | topages[i] = frompages[i]; | |
1022 | if (!topages[i]) | |
1023 | continue; | |
1024 | get_page(topages[i]); | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | /* | |
1029 | * Cache the reply pages up to NFSD_PAGES_PER_SLOT + 1, clearing the previous | |
1030 | * pages. We add a page to NFSD_PAGES_PER_SLOT for the case where the total | |
1031 | * length of the XDR response is less than se_fmaxresp_cached | |
1032 | * (NFSD_PAGES_PER_SLOT * PAGE_SIZE) but the xdr_buf pages is used for a | |
1033 | * of the reply (e.g. readdir). | |
1034 | * | |
1035 | * Store the base and length of the rq_req.head[0] page | |
1036 | * of the NFSv4.1 data, just past the rpc header. | |
1037 | */ | |
1038 | void | |
1039 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
1040 | { | |
1041 | struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; | |
1042 | struct svc_rqst *rqstp = resp->rqstp; | |
1043 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1044 | struct nfsd4_op *op = &args->ops[resp->opcnt]; | |
1045 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
1046 | ||
1047 | dprintk("--> %s entry %p\n", __func__, entry); | |
1048 | ||
1049 | /* Don't cache a failed OP_SEQUENCE. */ | |
1050 | if (resp->opcnt == 1 && op->opnum == OP_SEQUENCE && resp->cstate.status) | |
1051 | return; | |
bf864a31 | 1052 | |
074fe897 | 1053 | nfsd4_release_respages(entry->ce_respages, entry->ce_resused); |
bf864a31 AA |
1054 | entry->ce_opcnt = resp->opcnt; |
1055 | entry->ce_status = resp->cstate.status; | |
1056 | ||
1057 | /* | |
1058 | * Don't need a page to cache just the sequence operation - the slot | |
1059 | * does this for us! | |
1060 | */ | |
1061 | ||
1062 | if (nfsd4_not_cached(resp)) { | |
1063 | entry->ce_resused = 0; | |
1064 | entry->ce_rpchdrlen = 0; | |
1065 | dprintk("%s Just cache SEQUENCE. ce_cachethis %d\n", __func__, | |
1066 | resp->cstate.slot->sl_cache_entry.ce_cachethis); | |
1067 | return; | |
1068 | } | |
074fe897 AA |
1069 | entry->ce_resused = rqstp->rq_resused; |
1070 | if (entry->ce_resused > NFSD_PAGES_PER_SLOT + 1) | |
1071 | entry->ce_resused = NFSD_PAGES_PER_SLOT + 1; | |
1072 | nfsd4_copy_pages(entry->ce_respages, rqstp->rq_respages, | |
1073 | entry->ce_resused); | |
074fe897 AA |
1074 | entry->ce_datav.iov_base = resp->cstate.statp; |
1075 | entry->ce_datav.iov_len = resv->iov_len - ((char *)resp->cstate.statp - | |
1076 | (char *)page_address(rqstp->rq_respages[0])); | |
074fe897 AA |
1077 | /* Current request rpc header length*/ |
1078 | entry->ce_rpchdrlen = (char *)resp->cstate.statp - | |
1079 | (char *)page_address(rqstp->rq_respages[0]); | |
1080 | } | |
1081 | ||
1082 | /* | |
1083 | * We keep the rpc header, but take the nfs reply from the replycache. | |
1084 | */ | |
1085 | static int | |
1086 | nfsd41_copy_replay_data(struct nfsd4_compoundres *resp, | |
1087 | struct nfsd4_cache_entry *entry) | |
1088 | { | |
1089 | struct svc_rqst *rqstp = resp->rqstp; | |
1090 | struct kvec *resv = &resp->rqstp->rq_res.head[0]; | |
1091 | int len; | |
1092 | ||
1093 | /* Current request rpc header length*/ | |
1094 | len = (char *)resp->cstate.statp - | |
1095 | (char *)page_address(rqstp->rq_respages[0]); | |
1096 | if (entry->ce_datav.iov_len + len > PAGE_SIZE) { | |
1097 | dprintk("%s v41 cached reply too large (%Zd).\n", __func__, | |
1098 | entry->ce_datav.iov_len); | |
1099 | return 0; | |
1100 | } | |
1101 | /* copy the cached reply nfsd data past the current rpc header */ | |
1102 | memcpy((char *)resv->iov_base + len, entry->ce_datav.iov_base, | |
1103 | entry->ce_datav.iov_len); | |
1104 | resv->iov_len = len + entry->ce_datav.iov_len; | |
1105 | return 1; | |
1106 | } | |
1107 | ||
1108 | /* | |
1109 | * Keep the first page of the replay. Copy the NFSv4.1 data from the first | |
1110 | * cached page. Replace any futher replay pages from the cache. | |
1111 | */ | |
1112 | __be32 | |
bf864a31 AA |
1113 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1114 | struct nfsd4_sequence *seq) | |
074fe897 AA |
1115 | { |
1116 | struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; | |
1117 | __be32 status; | |
1118 | ||
1119 | dprintk("--> %s entry %p\n", __func__, entry); | |
1120 | ||
bf864a31 AA |
1121 | /* |
1122 | * If this is just the sequence operation, we did not keep | |
1123 | * a page in the cache entry because we can just use the | |
1124 | * slot info stored in struct nfsd4_sequence that was checked | |
1125 | * against the slot in nfsd4_sequence(). | |
1126 | * | |
1127 | * This occurs when seq->cachethis is FALSE, or when the client | |
1128 | * session inactivity timer fires and a solo sequence operation | |
1129 | * is sent (lease renewal). | |
1130 | */ | |
1131 | if (seq && nfsd4_not_cached(resp)) { | |
1132 | seq->maxslots = resp->cstate.session->se_fnumslots; | |
1133 | return nfs_ok; | |
1134 | } | |
074fe897 AA |
1135 | |
1136 | if (!nfsd41_copy_replay_data(resp, entry)) { | |
1137 | /* | |
1138 | * Not enough room to use the replay rpc header, send the | |
1139 | * cached header. Release all the allocated result pages. | |
1140 | */ | |
1141 | svc_free_res_pages(resp->rqstp); | |
1142 | nfsd4_copy_pages(resp->rqstp->rq_respages, entry->ce_respages, | |
1143 | entry->ce_resused); | |
1144 | } else { | |
1145 | /* Release all but the first allocated result page */ | |
1146 | ||
1147 | resp->rqstp->rq_resused--; | |
1148 | svc_free_res_pages(resp->rqstp); | |
1149 | ||
1150 | nfsd4_copy_pages(&resp->rqstp->rq_respages[1], | |
1151 | &entry->ce_respages[1], | |
1152 | entry->ce_resused - 1); | |
1153 | } | |
1154 | ||
1155 | resp->rqstp->rq_resused = entry->ce_resused; | |
da3846a2 AA |
1156 | resp->opcnt = entry->ce_opcnt; |
1157 | resp->cstate.iovlen = entry->ce_datav.iov_len + entry->ce_rpchdrlen; | |
074fe897 AA |
1158 | status = entry->ce_status; |
1159 | ||
1160 | return status; | |
1161 | } | |
1162 | ||
0733d213 AA |
1163 | /* |
1164 | * Set the exchange_id flags returned by the server. | |
1165 | */ | |
1166 | static void | |
1167 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1168 | { | |
1169 | /* pNFS is not supported */ | |
1170 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1171 | ||
1172 | /* Referrals are supported, Migration is not. */ | |
1173 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1174 | ||
1175 | /* set the wire flags to return to client. */ | |
1176 | clid->flags = new->cl_exchange_flags; | |
1177 | } | |
1178 | ||
069b6ad4 AA |
1179 | __be32 |
1180 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1181 | struct nfsd4_compound_state *cstate, | |
1182 | struct nfsd4_exchange_id *exid) | |
1183 | { | |
0733d213 AA |
1184 | struct nfs4_client *unconf, *conf, *new; |
1185 | int status; | |
1186 | unsigned int strhashval; | |
1187 | char dname[HEXDIR_LEN]; | |
1188 | nfs4_verifier verf = exid->verifier; | |
1189 | u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr; | |
1190 | ||
1191 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " | |
1192 | " ip_addr=%u flags %x, spa_how %d\n", | |
1193 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, | |
1194 | ip_addr, exid->flags, exid->spa_how); | |
1195 | ||
1196 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1197 | return nfserr_inval; | |
1198 | ||
1199 | /* Currently only support SP4_NONE */ | |
1200 | switch (exid->spa_how) { | |
1201 | case SP4_NONE: | |
1202 | break; | |
1203 | case SP4_SSV: | |
1204 | return nfserr_encr_alg_unsupp; | |
1205 | default: | |
1206 | BUG(); /* checked by xdr code */ | |
1207 | case SP4_MACH_CRED: | |
1208 | return nfserr_serverfault; /* no excuse :-/ */ | |
1209 | } | |
1210 | ||
1211 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1212 | ||
1213 | if (status) | |
1214 | goto error; | |
1215 | ||
1216 | strhashval = clientstr_hashval(dname); | |
1217 | ||
1218 | nfs4_lock_state(); | |
1219 | status = nfs_ok; | |
1220 | ||
a1bcecd2 | 1221 | conf = find_confirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1222 | if (conf) { |
1223 | if (!same_verf(&verf, &conf->cl_verifier)) { | |
1224 | /* 18.35.4 case 8 */ | |
1225 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1226 | status = nfserr_not_same; | |
1227 | goto out; | |
1228 | } | |
1229 | /* Client reboot: destroy old state */ | |
1230 | expire_client(conf); | |
1231 | goto out_new; | |
1232 | } | |
1233 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1234 | /* 18.35.4 case 9 */ | |
1235 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1236 | status = nfserr_perm; | |
1237 | goto out; | |
1238 | } | |
1239 | expire_client(conf); | |
1240 | goto out_new; | |
1241 | } | |
1242 | if (ip_addr != conf->cl_addr && | |
1243 | !(exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A)) { | |
1244 | /* Client collision. 18.35.4 case 3 */ | |
1245 | status = nfserr_clid_inuse; | |
1246 | goto out; | |
1247 | } | |
1248 | /* | |
1249 | * Set bit when the owner id and verifier map to an already | |
1250 | * confirmed client id (18.35.3). | |
1251 | */ | |
1252 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1253 | ||
1254 | /* | |
1255 | * Falling into 18.35.4 case 2, possible router replay. | |
1256 | * Leave confirmed record intact and return same result. | |
1257 | */ | |
1258 | copy_verf(conf, &verf); | |
1259 | new = conf; | |
1260 | goto out_copy; | |
1261 | } else { | |
1262 | /* 18.35.4 case 7 */ | |
1263 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1264 | status = nfserr_noent; | |
1265 | goto out; | |
1266 | } | |
1267 | } | |
1268 | ||
a1bcecd2 | 1269 | unconf = find_unconfirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1270 | if (unconf) { |
1271 | /* | |
1272 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1273 | * a new unconfirmed record should be generated regardless | |
1274 | * of whether any properties have changed. | |
1275 | */ | |
1276 | expire_client(unconf); | |
1277 | } | |
1278 | ||
1279 | out_new: | |
1280 | /* Normal case */ | |
1281 | new = create_client(exid->clname, dname); | |
1282 | if (new == NULL) { | |
1283 | status = nfserr_resource; | |
1284 | goto out; | |
1285 | } | |
1286 | ||
1287 | copy_verf(new, &verf); | |
1288 | copy_cred(&new->cl_cred, &rqstp->rq_cred); | |
1289 | new->cl_addr = ip_addr; | |
1290 | gen_clid(new); | |
1291 | gen_confirm(new); | |
1292 | add_to_unconfirmed(new, strhashval); | |
1293 | out_copy: | |
1294 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1295 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1296 | ||
38eb76a5 AA |
1297 | new->cl_slot.sl_seqid = 0; |
1298 | exid->seqid = 1; | |
0733d213 AA |
1299 | nfsd4_set_ex_flags(new, exid); |
1300 | ||
1301 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
38eb76a5 | 1302 | new->cl_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1303 | status = nfs_ok; |
1304 | ||
1305 | out: | |
1306 | nfs4_unlock_state(); | |
1307 | error: | |
1308 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1309 | return status; | |
069b6ad4 AA |
1310 | } |
1311 | ||
b85d4c01 BH |
1312 | static int |
1313 | check_slot_seqid(u32 seqid, struct nfsd4_slot *slot) | |
1314 | { | |
1315 | dprintk("%s enter. seqid %d slot->sl_seqid %d\n", __func__, seqid, | |
1316 | slot->sl_seqid); | |
1317 | ||
1318 | /* The slot is in use, and no response has been sent. */ | |
1319 | if (slot->sl_inuse) { | |
1320 | if (seqid == slot->sl_seqid) | |
1321 | return nfserr_jukebox; | |
1322 | else | |
1323 | return nfserr_seq_misordered; | |
1324 | } | |
1325 | /* Normal */ | |
1326 | if (likely(seqid == slot->sl_seqid + 1)) | |
1327 | return nfs_ok; | |
1328 | /* Replay */ | |
1329 | if (seqid == slot->sl_seqid) | |
1330 | return nfserr_replay_cache; | |
1331 | /* Wraparound */ | |
1332 | if (seqid == 1 && (slot->sl_seqid + 1) == 0) | |
1333 | return nfs_ok; | |
1334 | /* Misordered replay or misordered new request */ | |
1335 | return nfserr_seq_misordered; | |
1336 | } | |
1337 | ||
069b6ad4 AA |
1338 | __be32 |
1339 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1340 | struct nfsd4_compound_state *cstate, | |
1341 | struct nfsd4_create_session *cr_ses) | |
1342 | { | |
ec6b5d7b | 1343 | u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr; |
38eb76a5 | 1344 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
ec6b5d7b | 1345 | struct nfs4_client *conf, *unconf; |
38eb76a5 | 1346 | struct nfsd4_slot *slot = NULL; |
ec6b5d7b AA |
1347 | int status = 0; |
1348 | ||
1349 | nfs4_lock_state(); | |
1350 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1351 | conf = find_confirmed_client(&cr_ses->clientid); | |
1352 | ||
1353 | if (conf) { | |
38eb76a5 AA |
1354 | slot = &conf->cl_slot; |
1355 | status = check_slot_seqid(cr_ses->seqid, slot); | |
1356 | if (status == nfserr_replay_cache) { | |
ec6b5d7b | 1357 | dprintk("Got a create_session replay! seqid= %d\n", |
38eb76a5 AA |
1358 | slot->sl_seqid); |
1359 | cstate->slot = slot; | |
1360 | cstate->status = status; | |
1361 | /* Return the cached reply status */ | |
bf864a31 | 1362 | status = nfsd4_replay_cache_entry(resp, NULL); |
38eb76a5 AA |
1363 | goto out; |
1364 | } else if (cr_ses->seqid != conf->cl_slot.sl_seqid + 1) { | |
ec6b5d7b AA |
1365 | status = nfserr_seq_misordered; |
1366 | dprintk("Sequence misordered!\n"); | |
1367 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
38eb76a5 | 1368 | slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1369 | goto out; |
1370 | } | |
38eb76a5 | 1371 | conf->cl_slot.sl_seqid++; |
ec6b5d7b AA |
1372 | } else if (unconf) { |
1373 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
1374 | (ip_addr != unconf->cl_addr)) { | |
1375 | status = nfserr_clid_inuse; | |
1376 | goto out; | |
1377 | } | |
1378 | ||
38eb76a5 AA |
1379 | slot = &unconf->cl_slot; |
1380 | status = check_slot_seqid(cr_ses->seqid, slot); | |
1381 | if (status) { | |
1382 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b AA |
1383 | status = nfserr_seq_misordered; |
1384 | goto out; | |
1385 | } | |
1386 | ||
38eb76a5 | 1387 | slot->sl_seqid++; /* from 0 to 1 */ |
ec6b5d7b AA |
1388 | move_to_confirmed(unconf); |
1389 | ||
1390 | /* | |
1391 | * We do not support RDMA or persistent sessions | |
1392 | */ | |
1393 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1394 | cr_ses->flags &= ~SESSION4_RDMA; | |
1395 | ||
1396 | conf = unconf; | |
1397 | } else { | |
1398 | status = nfserr_stale_clientid; | |
1399 | goto out; | |
1400 | } | |
1401 | ||
1402 | status = alloc_init_session(rqstp, conf, cr_ses); | |
1403 | if (status) | |
1404 | goto out; | |
1405 | ||
ec6b5d7b AA |
1406 | memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, |
1407 | NFS4_MAX_SESSIONID_LEN); | |
38eb76a5 | 1408 | cr_ses->seqid = slot->sl_seqid; |
ec6b5d7b | 1409 | |
38eb76a5 AA |
1410 | slot->sl_inuse = true; |
1411 | cstate->slot = slot; | |
bf864a31 AA |
1412 | /* Ensure a page is used for the cache */ |
1413 | slot->sl_cache_entry.ce_cachethis = 1; | |
ec6b5d7b AA |
1414 | out: |
1415 | nfs4_unlock_state(); | |
1416 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1417 | return status; | |
069b6ad4 AA |
1418 | } |
1419 | ||
1420 | __be32 | |
1421 | nfsd4_destroy_session(struct svc_rqst *r, | |
1422 | struct nfsd4_compound_state *cstate, | |
1423 | struct nfsd4_destroy_session *sessionid) | |
1424 | { | |
e10e0cfc BH |
1425 | struct nfsd4_session *ses; |
1426 | u32 status = nfserr_badsession; | |
1427 | ||
1428 | /* Notes: | |
1429 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1430 | * - Should we return nfserr_back_chan_busy if waiting for | |
1431 | * callbacks on to-be-destroyed session? | |
1432 | * - Do we need to clear any callback info from previous session? | |
1433 | */ | |
1434 | ||
1435 | dump_sessionid(__func__, &sessionid->sessionid); | |
1436 | spin_lock(&sessionid_lock); | |
1437 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); | |
1438 | if (!ses) { | |
1439 | spin_unlock(&sessionid_lock); | |
1440 | goto out; | |
1441 | } | |
1442 | ||
1443 | unhash_session(ses); | |
1444 | spin_unlock(&sessionid_lock); | |
1445 | ||
1446 | /* wait for callbacks */ | |
1447 | shutdown_callback_client(ses->se_client); | |
1448 | nfsd4_put_session(ses); | |
1449 | status = nfs_ok; | |
1450 | out: | |
1451 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1452 | return status; | |
069b6ad4 AA |
1453 | } |
1454 | ||
1455 | __be32 | |
b85d4c01 | 1456 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1457 | struct nfsd4_compound_state *cstate, |
1458 | struct nfsd4_sequence *seq) | |
1459 | { | |
f9bb94c4 | 1460 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1461 | struct nfsd4_session *session; |
1462 | struct nfsd4_slot *slot; | |
1463 | int status; | |
1464 | ||
f9bb94c4 AA |
1465 | if (resp->opcnt != 1) |
1466 | return nfserr_sequence_pos; | |
1467 | ||
b85d4c01 BH |
1468 | spin_lock(&sessionid_lock); |
1469 | status = nfserr_badsession; | |
1470 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1471 | if (!session) | |
1472 | goto out; | |
1473 | ||
1474 | status = nfserr_badslot; | |
1475 | if (seq->slotid >= session->se_fnumslots) | |
1476 | goto out; | |
1477 | ||
1478 | slot = &session->se_slots[seq->slotid]; | |
1479 | dprintk("%s: slotid %d\n", __func__, seq->slotid); | |
1480 | ||
1481 | status = check_slot_seqid(seq->seqid, slot); | |
1482 | if (status == nfserr_replay_cache) { | |
1483 | cstate->slot = slot; | |
1484 | cstate->session = session; | |
da3846a2 | 1485 | /* Return the cached reply status and set cstate->status |
bf864a31 AA |
1486 | * for nfsd4_svc_encode_compoundres processing */ |
1487 | status = nfsd4_replay_cache_entry(resp, seq); | |
da3846a2 | 1488 | cstate->status = nfserr_replay_cache; |
b85d4c01 BH |
1489 | goto replay_cache; |
1490 | } | |
1491 | if (status) | |
1492 | goto out; | |
1493 | ||
1494 | /* Success! bump slot seqid */ | |
1495 | slot->sl_inuse = true; | |
1496 | slot->sl_seqid = seq->seqid; | |
bf864a31 AA |
1497 | slot->sl_cache_entry.ce_cachethis = seq->cachethis; |
1498 | /* Always set the cache entry cachethis for solo sequence */ | |
1499 | if (nfsd4_is_solo_sequence(resp)) | |
1500 | slot->sl_cache_entry.ce_cachethis = 1; | |
b85d4c01 BH |
1501 | |
1502 | cstate->slot = slot; | |
1503 | cstate->session = session; | |
1504 | ||
1505 | replay_cache: | |
1506 | /* Renew the clientid on success and on replay. | |
1507 | * Hold a session reference until done processing the compound: | |
1508 | * nfsd4_put_session called only if the cstate slot is set. | |
1509 | */ | |
1510 | renew_client(session->se_client); | |
1511 | nfsd4_get_session(session); | |
1512 | out: | |
1513 | spin_unlock(&sessionid_lock); | |
1514 | dprintk("%s: return %d\n", __func__, ntohl(status)); | |
1515 | return status; | |
069b6ad4 AA |
1516 | } |
1517 | ||
b37ad28b | 1518 | __be32 |
b591480b BF |
1519 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1520 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1521 | { |
27459f09 | 1522 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
1da177e4 LT |
1523 | struct xdr_netobj clname = { |
1524 | .len = setclid->se_namelen, | |
1525 | .data = setclid->se_name, | |
1526 | }; | |
1527 | nfs4_verifier clverifier = setclid->se_verf; | |
1528 | unsigned int strhashval; | |
28ce6054 | 1529 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1530 | __be32 status; |
68e76ad0 | 1531 | char *princ; |
a55370a3 | 1532 | char dname[HEXDIR_LEN]; |
1da177e4 | 1533 | |
1da177e4 | 1534 | if (!check_name(clname)) |
73aea4ec | 1535 | return nfserr_inval; |
1da177e4 | 1536 | |
a55370a3 N |
1537 | status = nfs4_make_rec_clidname(dname, &clname); |
1538 | if (status) | |
73aea4ec | 1539 | return status; |
a55370a3 | 1540 | |
1da177e4 LT |
1541 | /* |
1542 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1543 | * We get here on a DRC miss. | |
1544 | */ | |
1545 | ||
a55370a3 | 1546 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1547 | |
1da177e4 | 1548 | nfs4_lock_state(); |
a1bcecd2 | 1549 | conf = find_confirmed_client_by_str(dname, strhashval, false); |
28ce6054 | 1550 | if (conf) { |
a186e767 | 1551 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1552 | status = nfserr_clid_inuse; |
026722c2 BF |
1553 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
1554 | dprintk("NFSD: setclientid: string in use by client" | |
1555 | " at %pI4\n", &conf->cl_addr); | |
1da177e4 LT |
1556 | goto out; |
1557 | } | |
1da177e4 | 1558 | } |
a186e767 BF |
1559 | /* |
1560 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1561 | * has a description of SETCLIENTID request processing consisting | |
1562 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1563 | */ | |
a1bcecd2 | 1564 | unconf = find_unconfirmed_client_by_str(dname, strhashval, false); |
1da177e4 LT |
1565 | status = nfserr_resource; |
1566 | if (!conf) { | |
a186e767 BF |
1567 | /* |
1568 | * RFC 3530 14.2.33 CASE 4: | |
1569 | * placed first, because it is the normal case | |
1da177e4 LT |
1570 | */ |
1571 | if (unconf) | |
1572 | expire_client(unconf); | |
a55370a3 N |
1573 | new = create_client(clname, dname); |
1574 | if (new == NULL) | |
1da177e4 | 1575 | goto out; |
1da177e4 | 1576 | gen_clid(new); |
599e0a22 | 1577 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1578 | /* |
a186e767 BF |
1579 | * RFC 3530 14.2.33 CASE 1: |
1580 | * probable callback update | |
1da177e4 | 1581 | */ |
31f4a6c1 N |
1582 | if (unconf) { |
1583 | /* Note this is removing unconfirmed {*x***}, | |
1584 | * which is stronger than RFC recommended {vxc**}. | |
1585 | * This has the advantage that there is at most | |
1586 | * one {*x***} in either list at any time. | |
1587 | */ | |
1588 | expire_client(unconf); | |
1da177e4 | 1589 | } |
a55370a3 N |
1590 | new = create_client(clname, dname); |
1591 | if (new == NULL) | |
1da177e4 | 1592 | goto out; |
1da177e4 | 1593 | copy_clid(new, conf); |
1da177e4 LT |
1594 | } else if (!unconf) { |
1595 | /* | |
a186e767 BF |
1596 | * RFC 3530 14.2.33 CASE 2: |
1597 | * probable client reboot; state will be removed if | |
1598 | * confirmed. | |
1da177e4 | 1599 | */ |
a55370a3 N |
1600 | new = create_client(clname, dname); |
1601 | if (new == NULL) | |
1da177e4 | 1602 | goto out; |
1da177e4 | 1603 | gen_clid(new); |
49ba8781 | 1604 | } else { |
a186e767 BF |
1605 | /* |
1606 | * RFC 3530 14.2.33 CASE 3: | |
1607 | * probable client reboot; state will be removed if | |
1608 | * confirmed. | |
1da177e4 LT |
1609 | */ |
1610 | expire_client(unconf); | |
a55370a3 N |
1611 | new = create_client(clname, dname); |
1612 | if (new == NULL) | |
1da177e4 | 1613 | goto out; |
1da177e4 | 1614 | gen_clid(new); |
1da177e4 | 1615 | } |
c175b83c BF |
1616 | copy_verf(new, &clverifier); |
1617 | new->cl_addr = sin->sin_addr.s_addr; | |
61054b14 | 1618 | new->cl_flavor = rqstp->rq_flavor; |
68e76ad0 OK |
1619 | princ = svc_gss_principal(rqstp); |
1620 | if (princ) { | |
1621 | new->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1622 | if (new->cl_principal == NULL) { | |
1623 | free_client(new); | |
1624 | goto out; | |
1625 | } | |
1626 | } | |
c175b83c BF |
1627 | copy_cred(&new->cl_cred, &rqstp->rq_cred); |
1628 | gen_confirm(new); | |
1629 | gen_callback(new, setclid); | |
1630 | add_to_unconfirmed(new, strhashval); | |
1da177e4 LT |
1631 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
1632 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
1633 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
1634 | status = nfs_ok; | |
1635 | out: | |
1636 | nfs4_unlock_state(); | |
1637 | return status; | |
1638 | } | |
1639 | ||
1640 | ||
1641 | /* | |
a186e767 BF |
1642 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
1643 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
1644 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 1645 | */ |
b37ad28b | 1646 | __be32 |
b591480b BF |
1647 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
1648 | struct nfsd4_compound_state *cstate, | |
1649 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 1650 | { |
27459f09 | 1651 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
21ab45a4 | 1652 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
1653 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
1654 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 1655 | __be32 status; |
1da177e4 LT |
1656 | |
1657 | if (STALE_CLIENTID(clid)) | |
1658 | return nfserr_stale_clientid; | |
1659 | /* | |
1660 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1661 | * We get here on a DRC miss. | |
1662 | */ | |
1663 | ||
1664 | nfs4_lock_state(); | |
21ab45a4 N |
1665 | |
1666 | conf = find_confirmed_client(clid); | |
1667 | unconf = find_unconfirmed_client(clid); | |
1668 | ||
1669 | status = nfserr_clid_inuse; | |
27459f09 | 1670 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 | 1671 | goto out; |
27459f09 | 1672 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 N |
1673 | goto out; |
1674 | ||
a186e767 BF |
1675 | /* |
1676 | * section 14.2.34 of RFC 3530 has a description of | |
1677 | * SETCLIENTID_CONFIRM request processing consisting | |
1678 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
1679 | */ | |
366e0c1d | 1680 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
1681 | /* |
1682 | * RFC 3530 14.2.34 CASE 1: | |
1683 | * callback update | |
1684 | */ | |
599e0a22 | 1685 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
1686 | status = nfserr_clid_inuse; |
1687 | else { | |
1a69c179 N |
1688 | /* XXX: We just turn off callbacks until we can handle |
1689 | * change request correctly. */ | |
cb36d634 | 1690 | atomic_set(&conf->cl_callback.cb_set, 0); |
21ab45a4 | 1691 | gen_confirm(conf); |
46309029 | 1692 | nfsd4_remove_clid_dir(unconf); |
1a69c179 | 1693 | expire_client(unconf); |
1da177e4 | 1694 | status = nfs_ok; |
1a69c179 | 1695 | |
1da177e4 | 1696 | } |
f3aba4e5 | 1697 | } else if (conf && !unconf) { |
a186e767 BF |
1698 | /* |
1699 | * RFC 3530 14.2.34 CASE 2: | |
1700 | * probable retransmitted request; play it safe and | |
1701 | * do nothing. | |
7c79f737 | 1702 | */ |
599e0a22 | 1703 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 1704 | status = nfserr_clid_inuse; |
21ab45a4 | 1705 | else |
1da177e4 | 1706 | status = nfs_ok; |
7c79f737 | 1707 | } else if (!conf && unconf |
599e0a22 | 1708 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
1709 | /* |
1710 | * RFC 3530 14.2.34 CASE 3: | |
1711 | * Normal case; new or rebooted client: | |
7c79f737 | 1712 | */ |
599e0a22 | 1713 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
1714 | status = nfserr_clid_inuse; |
1715 | } else { | |
1a69c179 N |
1716 | unsigned int hash = |
1717 | clientstr_hashval(unconf->cl_recdir); | |
1718 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
a1bcecd2 | 1719 | hash, false); |
1a69c179 | 1720 | if (conf) { |
c7b9a459 | 1721 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
1722 | expire_client(conf); |
1723 | } | |
1da177e4 | 1724 | move_to_confirmed(unconf); |
21ab45a4 | 1725 | conf = unconf; |
46f8a64b | 1726 | nfsd4_probe_callback(conf); |
1a69c179 | 1727 | status = nfs_ok; |
1da177e4 | 1728 | } |
599e0a22 BF |
1729 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
1730 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 1731 | &confirm)))) { |
a186e767 BF |
1732 | /* |
1733 | * RFC 3530 14.2.34 CASE 4: | |
1734 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 1735 | */ |
1da177e4 | 1736 | status = nfserr_stale_clientid; |
7c79f737 | 1737 | } else { |
08e8987c N |
1738 | /* check that we have hit one of the cases...*/ |
1739 | status = nfserr_clid_inuse; | |
1740 | } | |
1da177e4 | 1741 | out: |
1da177e4 LT |
1742 | nfs4_unlock_state(); |
1743 | return status; | |
1744 | } | |
1745 | ||
1da177e4 LT |
1746 | /* OPEN Share state helper functions */ |
1747 | static inline struct nfs4_file * | |
1748 | alloc_init_file(struct inode *ino) | |
1749 | { | |
1750 | struct nfs4_file *fp; | |
1751 | unsigned int hashval = file_hashval(ino); | |
1752 | ||
e60d4398 N |
1753 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
1754 | if (fp) { | |
8b671b80 | 1755 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 1756 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
1757 | INIT_LIST_HEAD(&fp->fi_stateids); |
1758 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8b671b80 | 1759 | spin_lock(&recall_lock); |
1da177e4 | 1760 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
8b671b80 | 1761 | spin_unlock(&recall_lock); |
1da177e4 LT |
1762 | fp->fi_inode = igrab(ino); |
1763 | fp->fi_id = current_fileid++; | |
47f9940c | 1764 | fp->fi_had_conflict = false; |
1da177e4 LT |
1765 | return fp; |
1766 | } | |
1767 | return NULL; | |
1768 | } | |
1769 | ||
e60d4398 | 1770 | static void |
e18b890b | 1771 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1772 | { |
e60d4398 N |
1773 | if (*slab == NULL) |
1774 | return; | |
1a1d92c1 | 1775 | kmem_cache_destroy(*slab); |
e60d4398 | 1776 | *slab = NULL; |
1da177e4 LT |
1777 | } |
1778 | ||
e8ff2a84 | 1779 | void |
1da177e4 LT |
1780 | nfsd4_free_slabs(void) |
1781 | { | |
e60d4398 N |
1782 | nfsd4_free_slab(&stateowner_slab); |
1783 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1784 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1785 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1786 | } |
1da177e4 | 1787 | |
e60d4398 N |
1788 | static int |
1789 | nfsd4_init_slabs(void) | |
1790 | { | |
1791 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 1792 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
1793 | if (stateowner_slab == NULL) |
1794 | goto out_nomem; | |
1795 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 1796 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
1797 | if (file_slab == NULL) |
1798 | goto out_nomem; | |
5ac049ac | 1799 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 1800 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
1801 | if (stateid_slab == NULL) |
1802 | goto out_nomem; | |
5b2d21c1 | 1803 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 1804 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
1805 | if (deleg_slab == NULL) |
1806 | goto out_nomem; | |
e60d4398 N |
1807 | return 0; |
1808 | out_nomem: | |
1809 | nfsd4_free_slabs(); | |
1810 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1811 | return -ENOMEM; | |
1da177e4 LT |
1812 | } |
1813 | ||
1814 | void | |
1815 | nfs4_free_stateowner(struct kref *kref) | |
1816 | { | |
1817 | struct nfs4_stateowner *sop = | |
1818 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1819 | kfree(sop->so_owner.data); | |
1820 | kmem_cache_free(stateowner_slab, sop); | |
1821 | } | |
1822 | ||
1823 | static inline struct nfs4_stateowner * | |
1824 | alloc_stateowner(struct xdr_netobj *owner) | |
1825 | { | |
1826 | struct nfs4_stateowner *sop; | |
1827 | ||
1828 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1829 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1830 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1831 | sop->so_owner.len = owner->len; | |
1832 | kref_init(&sop->so_ref); | |
1833 | return sop; | |
1834 | } | |
1835 | kmem_cache_free(stateowner_slab, sop); | |
1836 | } | |
1837 | return NULL; | |
1838 | } | |
1839 | ||
1840 | static struct nfs4_stateowner * | |
1841 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1842 | struct nfs4_stateowner *sop; | |
1843 | struct nfs4_replay *rp; | |
1844 | unsigned int idhashval; | |
1845 | ||
1846 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1847 | return NULL; | |
1848 | idhashval = ownerid_hashval(current_ownerid); | |
1849 | INIT_LIST_HEAD(&sop->so_idhash); | |
1850 | INIT_LIST_HEAD(&sop->so_strhash); | |
1851 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1852 | INIT_LIST_HEAD(&sop->so_stateids); |
1853 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1854 | INIT_LIST_HEAD(&sop->so_close_lru); |
1855 | sop->so_time = 0; | |
1856 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1857 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1858 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1859 | sop->so_is_open_owner = 1; |
1860 | sop->so_id = current_ownerid++; | |
1861 | sop->so_client = clp; | |
1862 | sop->so_seqid = open->op_seqid; | |
1863 | sop->so_confirmed = 0; | |
1864 | rp = &sop->so_replay; | |
de1ae286 | 1865 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1866 | rp->rp_buflen = 0; |
1867 | rp->rp_buf = rp->rp_ibuf; | |
1868 | return sop; | |
1869 | } | |
1870 | ||
1da177e4 LT |
1871 | static inline void |
1872 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1873 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1874 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1875 | ||
1876 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1877 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1878 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1879 | INIT_LIST_HEAD(&stp->st_perfile); |
1880 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1881 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1882 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1883 | stp->st_stateowner = sop; |
13cd2184 | 1884 | get_nfs4_file(fp); |
1da177e4 LT |
1885 | stp->st_file = fp; |
1886 | stp->st_stateid.si_boot = boot_time; | |
1887 | stp->st_stateid.si_stateownerid = sop->so_id; | |
1888 | stp->st_stateid.si_fileid = fp->fi_id; | |
1889 | stp->st_stateid.si_generation = 0; | |
1890 | stp->st_access_bmap = 0; | |
1891 | stp->st_deny_bmap = 0; | |
84459a11 AA |
1892 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
1893 | &stp->st_access_bmap); | |
1da177e4 | 1894 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 1895 | stp->st_openstp = NULL; |
1da177e4 LT |
1896 | } |
1897 | ||
fd39ca9a | 1898 | static void |
1da177e4 LT |
1899 | move_to_close_lru(struct nfs4_stateowner *sop) |
1900 | { | |
1901 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1902 | ||
358dd55a | 1903 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1904 | sop->so_time = get_seconds(); |
1905 | } | |
1906 | ||
1da177e4 | 1907 | static int |
599e0a22 BF |
1908 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1909 | clientid_t *clid) | |
1910 | { | |
1911 | return (sop->so_owner.len == owner->len) && | |
1912 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1913 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1914 | } |
1915 | ||
1916 | static struct nfs4_stateowner * | |
1917 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1918 | { | |
1919 | struct nfs4_stateowner *so = NULL; | |
1920 | ||
1921 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1922 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1923 | return so; |
1924 | } | |
1925 | return NULL; | |
1926 | } | |
1927 | ||
1928 | /* search file_hashtbl[] for file */ | |
1929 | static struct nfs4_file * | |
1930 | find_file(struct inode *ino) | |
1931 | { | |
1932 | unsigned int hashval = file_hashval(ino); | |
1933 | struct nfs4_file *fp; | |
1934 | ||
8b671b80 | 1935 | spin_lock(&recall_lock); |
1da177e4 | 1936 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
1937 | if (fp->fi_inode == ino) { |
1938 | get_nfs4_file(fp); | |
8b671b80 | 1939 | spin_unlock(&recall_lock); |
1da177e4 | 1940 | return fp; |
13cd2184 | 1941 | } |
1da177e4 | 1942 | } |
8b671b80 | 1943 | spin_unlock(&recall_lock); |
1da177e4 LT |
1944 | return NULL; |
1945 | } | |
1946 | ||
d87a8ade | 1947 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 1948 | { |
d87a8ade | 1949 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 1950 | return 0; |
d87a8ade AA |
1951 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
1952 | return 0; | |
1953 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
1954 | if (minorversion && x) { | |
1955 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
1956 | return 0; | |
1957 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
1958 | return 0; | |
1959 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
1960 | } | |
1961 | if (x) | |
8838dc43 BF |
1962 | return 0; |
1963 | return 1; | |
ba5a6a19 BF |
1964 | } |
1965 | ||
8838dc43 | 1966 | static inline int deny_valid(u32 x) |
ba5a6a19 | 1967 | { |
8838dc43 BF |
1968 | /* Note: unlike access bits, deny bits may be zero. */ |
1969 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 1970 | } |
1da177e4 | 1971 | |
4f83aa30 BF |
1972 | /* |
1973 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1974 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1975 | * only what share bits are currently in force, but also what | |
1976 | * combinations of share bits previous opens have used. This allows us | |
1977 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1978 | * return an error if the client attempt to downgrade to a combination | |
1979 | * of share bits not explicable by closing some of its previous opens. | |
1980 | * | |
1981 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1982 | * track of access/deny bit combinations; so, e.g., we allow: | |
1983 | * | |
1984 | * OPEN allow read, deny write | |
1985 | * OPEN allow both, deny none | |
1986 | * DOWNGRADE allow read, deny none | |
1987 | * | |
1988 | * which we should reject. | |
1989 | */ | |
fd39ca9a | 1990 | static void |
1da177e4 LT |
1991 | set_access(unsigned int *access, unsigned long bmap) { |
1992 | int i; | |
1993 | ||
1994 | *access = 0; | |
1995 | for (i = 1; i < 4; i++) { | |
1996 | if (test_bit(i, &bmap)) | |
1997 | *access |= i; | |
1998 | } | |
1999 | } | |
2000 | ||
fd39ca9a | 2001 | static void |
1da177e4 LT |
2002 | set_deny(unsigned int *deny, unsigned long bmap) { |
2003 | int i; | |
2004 | ||
2005 | *deny = 0; | |
2006 | for (i = 0; i < 4; i++) { | |
2007 | if (test_bit(i, &bmap)) | |
2008 | *deny |= i ; | |
2009 | } | |
2010 | } | |
2011 | ||
2012 | static int | |
2013 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
2014 | unsigned int access, deny; | |
2015 | ||
2016 | set_access(&access, stp->st_access_bmap); | |
2017 | set_deny(&deny, stp->st_deny_bmap); | |
2018 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
2019 | return 0; | |
2020 | return 1; | |
2021 | } | |
2022 | ||
2023 | /* | |
2024 | * Called to check deny when READ with all zero stateid or | |
2025 | * WRITE with all zero or all one stateid | |
2026 | */ | |
b37ad28b | 2027 | static __be32 |
1da177e4 LT |
2028 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2029 | { | |
2030 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2031 | struct nfs4_file *fp; | |
2032 | struct nfs4_stateid *stp; | |
b37ad28b | 2033 | __be32 ret; |
1da177e4 LT |
2034 | |
2035 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2036 | ||
2037 | fp = find_file(ino); | |
13cd2184 N |
2038 | if (!fp) |
2039 | return nfs_ok; | |
b700949b | 2040 | ret = nfserr_locked; |
1da177e4 | 2041 | /* Search for conflicting share reservations */ |
13cd2184 N |
2042 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2043 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2044 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2045 | goto out; | |
1da177e4 | 2046 | } |
13cd2184 N |
2047 | ret = nfs_ok; |
2048 | out: | |
2049 | put_nfs4_file(fp); | |
2050 | return ret; | |
1da177e4 LT |
2051 | } |
2052 | ||
2053 | static inline void | |
2054 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
2055 | { | |
2056 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
aceaf78d | 2057 | drop_file_write_access(filp); |
1da177e4 LT |
2058 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
2059 | } | |
2060 | } | |
2061 | ||
2062 | /* | |
2063 | * Recall a delegation | |
2064 | */ | |
2065 | static int | |
2066 | do_recall(void *__dp) | |
2067 | { | |
2068 | struct nfs4_delegation *dp = __dp; | |
2069 | ||
47f9940c | 2070 | dp->dl_file->fi_had_conflict = true; |
1da177e4 LT |
2071 | nfsd4_cb_recall(dp); |
2072 | return 0; | |
2073 | } | |
2074 | ||
2075 | /* | |
2076 | * Spawn a thread to perform a recall on the delegation represented | |
2077 | * by the lease (file_lock) | |
2078 | * | |
2079 | * Called from break_lease() with lock_kernel() held. | |
2080 | * Note: we assume break_lease will only call this *once* for any given | |
2081 | * lease. | |
2082 | */ | |
2083 | static | |
2084 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
2085 | { | |
2086 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; | |
2087 | struct task_struct *t; | |
2088 | ||
2089 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
2090 | if (!dp) | |
2091 | return; | |
2092 | ||
2093 | /* We're assuming the state code never drops its reference | |
2094 | * without first removing the lease. Since we're in this lease | |
2095 | * callback (and since the lease code is serialized by the kernel | |
2096 | * lock) we know the server hasn't removed the lease yet, we know | |
2097 | * it's safe to take a reference: */ | |
2098 | atomic_inc(&dp->dl_count); | |
cfdcad4d | 2099 | atomic_inc(&dp->dl_client->cl_count); |
1da177e4 LT |
2100 | |
2101 | spin_lock(&recall_lock); | |
2102 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
2103 | spin_unlock(&recall_lock); | |
2104 | ||
2105 | /* only place dl_time is set. protected by lock_kernel*/ | |
2106 | dp->dl_time = get_seconds(); | |
2107 | ||
0272e1fd BF |
2108 | /* |
2109 | * We don't want the locks code to timeout the lease for us; | |
2110 | * we'll remove it ourself if the delegation isn't returned | |
2111 | * in time. | |
2112 | */ | |
2113 | fl->fl_break_time = 0; | |
1da177e4 LT |
2114 | |
2115 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); | |
2116 | if (IS_ERR(t)) { | |
2117 | struct nfs4_client *clp = dp->dl_client; | |
2118 | ||
2119 | printk(KERN_INFO "NFSD: Callback thread failed for " | |
2120 | "for client (clientid %08x/%08x)\n", | |
2121 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
cfdcad4d | 2122 | put_nfs4_client(dp->dl_client); |
1da177e4 LT |
2123 | nfs4_put_delegation(dp); |
2124 | } | |
2125 | } | |
2126 | ||
2127 | /* | |
2128 | * The file_lock is being reapd. | |
2129 | * | |
2130 | * Called by locks_free_lock() with lock_kernel() held. | |
2131 | */ | |
2132 | static | |
2133 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
2134 | { | |
2135 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
2136 | ||
2137 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
2138 | ||
2139 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
2140 | return; | |
2141 | dp->dl_flock = NULL; | |
2142 | } | |
2143 | ||
2144 | /* | |
2145 | * Set the delegation file_lock back pointer. | |
2146 | * | |
a9933cea | 2147 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
2148 | */ |
2149 | static | |
2150 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
2151 | { | |
2152 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
2153 | ||
2154 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
2155 | if (!dp) | |
2156 | return; | |
2157 | dp->dl_flock = new; | |
2158 | } | |
2159 | ||
2160 | /* | |
a9933cea | 2161 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
2162 | */ |
2163 | static | |
2164 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
2165 | { | |
2166 | struct nfs4_delegation *onlistd = | |
2167 | (struct nfs4_delegation *)onlist->fl_owner; | |
2168 | struct nfs4_delegation *tryd = | |
2169 | (struct nfs4_delegation *)try->fl_owner; | |
2170 | ||
2171 | if (onlist->fl_lmops != try->fl_lmops) | |
2172 | return 0; | |
2173 | ||
2174 | return onlistd->dl_client == tryd->dl_client; | |
2175 | } | |
2176 | ||
2177 | ||
2178 | static | |
2179 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2180 | { | |
2181 | if (arg & F_UNLCK) | |
2182 | return lease_modify(onlist, arg); | |
2183 | else | |
2184 | return -EAGAIN; | |
2185 | } | |
2186 | ||
fd39ca9a | 2187 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
2188 | .fl_break = nfsd_break_deleg_cb, |
2189 | .fl_release_private = nfsd_release_deleg_cb, | |
2190 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
2191 | .fl_mylease = nfsd_same_client_deleg_cb, | |
2192 | .fl_change = nfsd_change_deleg_cb, | |
2193 | }; | |
2194 | ||
2195 | ||
b37ad28b | 2196 | __be32 |
6668958f AA |
2197 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2198 | struct nfsd4_open *open) | |
1da177e4 | 2199 | { |
1da177e4 LT |
2200 | clientid_t *clientid = &open->op_clientid; |
2201 | struct nfs4_client *clp = NULL; | |
2202 | unsigned int strhashval; | |
2203 | struct nfs4_stateowner *sop = NULL; | |
2204 | ||
1da177e4 | 2205 | if (!check_name(open->op_owner)) |
0f442aa2 | 2206 | return nfserr_inval; |
1da177e4 LT |
2207 | |
2208 | if (STALE_CLIENTID(&open->op_clientid)) | |
2209 | return nfserr_stale_clientid; | |
2210 | ||
2211 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2212 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2213 | open->op_stateowner = sop; |
2214 | if (!sop) { | |
2215 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2216 | clp = find_confirmed_client(clientid); |
2217 | if (clp == NULL) | |
0f442aa2 BF |
2218 | return nfserr_expired; |
2219 | goto renew; | |
1da177e4 | 2220 | } |
6668958f AA |
2221 | /* When sessions are used, skip open sequenceid processing */ |
2222 | if (nfsd4_has_session(cstate)) | |
2223 | goto renew; | |
0f442aa2 BF |
2224 | if (!sop->so_confirmed) { |
2225 | /* Replace unconfirmed owners without checking for replay. */ | |
2226 | clp = sop->so_client; | |
f044ff83 | 2227 | release_openowner(sop); |
0f442aa2 BF |
2228 | open->op_stateowner = NULL; |
2229 | goto renew; | |
2230 | } | |
2231 | if (open->op_seqid == sop->so_seqid - 1) { | |
2232 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2233 | return nfserr_replay_me; |
0f442aa2 BF |
2234 | /* The original OPEN failed so spectacularly |
2235 | * that we don't even have replay data saved! | |
2236 | * Therefore, we have no choice but to continue | |
2237 | * processing this OPEN; presumably, we'll | |
2238 | * fail again for the same reason. | |
2239 | */ | |
2240 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2241 | goto renew; | |
2242 | } | |
2243 | if (open->op_seqid != sop->so_seqid) | |
2244 | return nfserr_bad_seqid; | |
1da177e4 | 2245 | renew: |
0f442aa2 BF |
2246 | if (open->op_stateowner == NULL) { |
2247 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2248 | if (sop == NULL) | |
2249 | return nfserr_resource; | |
2250 | open->op_stateowner = sop; | |
2251 | } | |
2252 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2253 | renew_client(sop->so_client); |
0f442aa2 | 2254 | return nfs_ok; |
1da177e4 LT |
2255 | } |
2256 | ||
b37ad28b | 2257 | static inline __be32 |
4a6e43e6 N |
2258 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2259 | { | |
2260 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2261 | return nfserr_openmode; | |
2262 | else | |
2263 | return nfs_ok; | |
2264 | } | |
2265 | ||
52f4fb43 N |
2266 | static struct nfs4_delegation * |
2267 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2268 | { | |
2269 | struct nfs4_delegation *dp; | |
2270 | ||
ea1da636 | 2271 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
2272 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
2273 | return dp; | |
2274 | } | |
2275 | return NULL; | |
2276 | } | |
2277 | ||
b37ad28b | 2278 | static __be32 |
567d9829 N |
2279 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2280 | struct nfs4_delegation **dp) | |
2281 | { | |
2282 | int flags; | |
b37ad28b | 2283 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2284 | |
2285 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2286 | if (*dp == NULL) | |
c44c5eeb | 2287 | goto out; |
567d9829 N |
2288 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
2289 | RD_STATE : WR_STATE; | |
2290 | status = nfs4_check_delegmode(*dp, flags); | |
2291 | if (status) | |
2292 | *dp = NULL; | |
c44c5eeb N |
2293 | out: |
2294 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2295 | return nfs_ok; | |
2296 | if (status) | |
2297 | return status; | |
2298 | open->op_stateowner->so_confirmed = 1; | |
2299 | return nfs_ok; | |
567d9829 N |
2300 | } |
2301 | ||
b37ad28b | 2302 | static __be32 |
1da177e4 LT |
2303 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2304 | { | |
2305 | struct nfs4_stateid *local; | |
b37ad28b | 2306 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2307 | struct nfs4_stateowner *sop = open->op_stateowner; |
2308 | ||
8beefa24 | 2309 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2310 | /* ignore lock owners */ |
2311 | if (local->st_stateowner->so_is_open_owner == 0) | |
2312 | continue; | |
2313 | /* remember if we have seen this open owner */ | |
2314 | if (local->st_stateowner == sop) | |
2315 | *stpp = local; | |
2316 | /* check for conflicting share reservations */ | |
2317 | if (!test_share(local, open)) | |
2318 | goto out; | |
2319 | } | |
2320 | status = 0; | |
2321 | out: | |
2322 | return status; | |
2323 | } | |
2324 | ||
5ac049ac N |
2325 | static inline struct nfs4_stateid * |
2326 | nfs4_alloc_stateid(void) | |
2327 | { | |
2328 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2329 | } | |
2330 | ||
b37ad28b | 2331 | static __be32 |
1da177e4 | 2332 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 2333 | struct nfs4_delegation *dp, |
1da177e4 LT |
2334 | struct svc_fh *cur_fh, int flags) |
2335 | { | |
2336 | struct nfs4_stateid *stp; | |
1da177e4 | 2337 | |
5ac049ac | 2338 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2339 | if (stp == NULL) |
2340 | return nfserr_resource; | |
2341 | ||
567d9829 N |
2342 | if (dp) { |
2343 | get_file(dp->dl_vfs_file); | |
2344 | stp->st_vfs_file = dp->dl_vfs_file; | |
2345 | } else { | |
b37ad28b | 2346 | __be32 status; |
567d9829 N |
2347 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
2348 | &stp->st_vfs_file); | |
2349 | if (status) { | |
2350 | if (status == nfserr_dropit) | |
2351 | status = nfserr_jukebox; | |
5ac049ac | 2352 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
2353 | return status; |
2354 | } | |
1da177e4 | 2355 | } |
1da177e4 LT |
2356 | *stpp = stp; |
2357 | return 0; | |
2358 | } | |
2359 | ||
b37ad28b | 2360 | static inline __be32 |
1da177e4 LT |
2361 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2362 | struct nfsd4_open *open) | |
2363 | { | |
2364 | struct iattr iattr = { | |
2365 | .ia_valid = ATTR_SIZE, | |
2366 | .ia_size = 0, | |
2367 | }; | |
2368 | if (!open->op_truncate) | |
2369 | return 0; | |
2370 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2371 | return nfserr_inval; |
1da177e4 LT |
2372 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2373 | } | |
2374 | ||
b37ad28b | 2375 | static __be32 |
1da177e4 LT |
2376 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
2377 | { | |
2378 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 2379 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 2380 | unsigned int share_access, new_writer; |
b37ad28b | 2381 | __be32 status; |
1da177e4 LT |
2382 | |
2383 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
2384 | new_writer = (~share_access) & open->op_share_access |
2385 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 2386 | |
6c26d08f | 2387 | if (new_writer) { |
b37ad28b AV |
2388 | int err = get_write_access(inode); |
2389 | if (err) | |
2390 | return nfserrno(err); | |
e518f056 BH |
2391 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
2392 | if (err) | |
2393 | return nfserrno(err); | |
2394 | file_take_write(filp); | |
6c26d08f | 2395 | } |
1da177e4 LT |
2396 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2397 | if (status) { | |
6c26d08f BF |
2398 | if (new_writer) |
2399 | put_write_access(inode); | |
1da177e4 LT |
2400 | return status; |
2401 | } | |
2402 | /* remember the open */ | |
6c26d08f | 2403 | filp->f_mode |= open->op_share_access; |
b55e0ba1 BF |
2404 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
2405 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1da177e4 LT |
2406 | |
2407 | return nfs_ok; | |
2408 | } | |
2409 | ||
2410 | ||
1da177e4 | 2411 | static void |
37515177 | 2412 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2413 | { |
37515177 N |
2414 | open->op_stateowner->so_confirmed = 1; |
2415 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2416 | } |
2417 | ||
2418 | /* | |
2419 | * Attempt to hand out a delegation. | |
2420 | */ | |
2421 | static void | |
2422 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2423 | { | |
2424 | struct nfs4_delegation *dp; | |
2425 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
2426 | struct nfs4_callback *cb = &sop->so_client->cl_callback; | |
2427 | struct file_lock fl, *flp = &fl; | |
2428 | int status, flag = 0; | |
2429 | ||
2430 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
2431 | open->op_recall = 0; |
2432 | switch (open->op_claim_type) { | |
2433 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2434 | if (!atomic_read(&cb->cb_set)) | |
2435 | open->op_recall = 1; | |
2436 | flag = open->op_delegate_type; | |
2437 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2438 | goto out; | |
2439 | break; | |
2440 | case NFS4_OPEN_CLAIM_NULL: | |
2441 | /* Let's not give out any delegations till everyone's | |
2442 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2443 | if (locks_in_grace()) |
7b190fec N |
2444 | goto out; |
2445 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
2446 | goto out; | |
2447 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2448 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2449 | else | |
2450 | flag = NFS4_OPEN_DELEGATE_READ; | |
2451 | break; | |
2452 | default: | |
2453 | goto out; | |
2454 | } | |
1da177e4 LT |
2455 | |
2456 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
2457 | if (dp == NULL) { | |
2458 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2459 | goto out; | |
2460 | } | |
2461 | locks_init_lock(&fl); | |
2462 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
2463 | fl.fl_flags = FL_LEASE; | |
9167f501 | 2464 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
2465 | fl.fl_end = OFFSET_MAX; |
2466 | fl.fl_owner = (fl_owner_t)dp; | |
2467 | fl.fl_file = stp->st_vfs_file; | |
2468 | fl.fl_pid = current->tgid; | |
2469 | ||
a9933cea | 2470 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
2471 | * the lock_manager callbacks fl_mylease and fl_change are used |
2472 | */ | |
9167f501 | 2473 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 2474 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 2475 | unhash_delegation(dp); |
1da177e4 LT |
2476 | flag = NFS4_OPEN_DELEGATE_NONE; |
2477 | goto out; | |
2478 | } | |
2479 | ||
2480 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2481 | ||
2482 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | |
2483 | dp->dl_stateid.si_boot, | |
2484 | dp->dl_stateid.si_stateownerid, | |
2485 | dp->dl_stateid.si_fileid, | |
2486 | dp->dl_stateid.si_generation); | |
2487 | out: | |
7b190fec N |
2488 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2489 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2490 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2491 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
2492 | open->op_delegate_type = flag; |
2493 | } | |
2494 | ||
2495 | /* | |
2496 | * called with nfs4_lock_state() held. | |
2497 | */ | |
b37ad28b | 2498 | __be32 |
1da177e4 LT |
2499 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2500 | { | |
6668958f | 2501 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2502 | struct nfs4_file *fp = NULL; |
2503 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2504 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2505 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2506 | __be32 status; |
1da177e4 LT |
2507 | |
2508 | status = nfserr_inval; | |
d87a8ade | 2509 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2510 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2511 | goto out; |
2512 | /* | |
2513 | * Lookup file; if found, lookup stateid and check open request, | |
2514 | * and check for delegations in the process of being recalled. | |
2515 | * If not found, create the nfs4_file struct | |
2516 | */ | |
2517 | fp = find_file(ino); | |
2518 | if (fp) { | |
2519 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2520 | goto out; | |
c44c5eeb N |
2521 | status = nfs4_check_deleg(fp, open, &dp); |
2522 | if (status) | |
2523 | goto out; | |
1da177e4 | 2524 | } else { |
c44c5eeb N |
2525 | status = nfserr_bad_stateid; |
2526 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2527 | goto out; | |
1da177e4 LT |
2528 | status = nfserr_resource; |
2529 | fp = alloc_init_file(ino); | |
2530 | if (fp == NULL) | |
2531 | goto out; | |
2532 | } | |
2533 | ||
2534 | /* | |
2535 | * OPEN the file, or upgrade an existing OPEN. | |
2536 | * If truncate fails, the OPEN fails. | |
2537 | */ | |
2538 | if (stp) { | |
2539 | /* Stateid was found, this is an OPEN upgrade */ | |
2540 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
2541 | if (status) | |
2542 | goto out; | |
444c2c07 | 2543 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
2544 | } else { |
2545 | /* Stateid was not found, this is a new OPEN */ | |
2546 | int flags = 0; | |
9ecb6a08 | 2547 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 2548 | flags |= NFSD_MAY_READ; |
1da177e4 | 2549 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 2550 | flags |= NFSD_MAY_WRITE; |
567d9829 N |
2551 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
2552 | if (status) | |
1da177e4 LT |
2553 | goto out; |
2554 | init_stateid(stp, fp, open); | |
2555 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2556 | if (status) { | |
2283963f | 2557 | release_open_stateid(stp); |
1da177e4 LT |
2558 | goto out; |
2559 | } | |
6668958f AA |
2560 | if (nfsd4_has_session(&resp->cstate)) |
2561 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2562 | } |
2563 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2564 | ||
6668958f AA |
2565 | if (nfsd4_has_session(&resp->cstate)) |
2566 | open->op_stateowner->so_confirmed = 1; | |
2567 | ||
1da177e4 LT |
2568 | /* |
2569 | * Attempt to hand out a delegation. No error return, because the | |
2570 | * OPEN succeeds even if we fail. | |
2571 | */ | |
2572 | nfs4_open_delegation(current_fh, open, stp); | |
2573 | ||
2574 | status = nfs_ok; | |
2575 | ||
2576 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | |
2577 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | |
2578 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | |
2579 | out: | |
13cd2184 N |
2580 | if (fp) |
2581 | put_nfs4_file(fp); | |
37515177 N |
2582 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2583 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2584 | /* |
2585 | * To finish the open response, we just need to set the rflags. | |
2586 | */ | |
2587 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2588 | if (!open->op_stateowner->so_confirmed && |
2589 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2590 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2591 | ||
2592 | return status; | |
2593 | } | |
2594 | ||
b37ad28b | 2595 | __be32 |
b591480b BF |
2596 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2597 | clientid_t *clid) | |
1da177e4 LT |
2598 | { |
2599 | struct nfs4_client *clp; | |
b37ad28b | 2600 | __be32 status; |
1da177e4 LT |
2601 | |
2602 | nfs4_lock_state(); | |
2603 | dprintk("process_renew(%08x/%08x): starting\n", | |
2604 | clid->cl_boot, clid->cl_id); | |
2605 | status = nfserr_stale_clientid; | |
2606 | if (STALE_CLIENTID(clid)) | |
2607 | goto out; | |
2608 | clp = find_confirmed_client(clid); | |
2609 | status = nfserr_expired; | |
2610 | if (clp == NULL) { | |
2611 | /* We assume the client took too long to RENEW. */ | |
2612 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2613 | goto out; | |
2614 | } | |
2615 | renew_client(clp); | |
2616 | status = nfserr_cb_path_down; | |
ea1da636 | 2617 | if (!list_empty(&clp->cl_delegations) |
1da177e4 LT |
2618 | && !atomic_read(&clp->cl_callback.cb_set)) |
2619 | goto out; | |
2620 | status = nfs_ok; | |
2621 | out: | |
2622 | nfs4_unlock_state(); | |
2623 | return status; | |
2624 | } | |
2625 | ||
af558e33 BF |
2626 | struct lock_manager nfsd4_manager = { |
2627 | }; | |
2628 | ||
a76b4319 | 2629 | static void |
af558e33 | 2630 | nfsd4_end_grace(void) |
a76b4319 N |
2631 | { |
2632 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2633 | nfsd4_recdir_purge_old(); |
af558e33 | 2634 | locks_end_grace(&nfsd4_manager); |
a76b4319 N |
2635 | } |
2636 | ||
fd39ca9a | 2637 | static time_t |
1da177e4 LT |
2638 | nfs4_laundromat(void) |
2639 | { | |
2640 | struct nfs4_client *clp; | |
2641 | struct nfs4_stateowner *sop; | |
2642 | struct nfs4_delegation *dp; | |
2643 | struct list_head *pos, *next, reaplist; | |
2644 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
2645 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
2646 | time_t u, test_val = NFSD_LEASE_TIME; | |
2647 | ||
2648 | nfs4_lock_state(); | |
2649 | ||
2650 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2651 | if (locks_in_grace()) |
2652 | nfsd4_end_grace(); | |
1da177e4 LT |
2653 | list_for_each_safe(pos, next, &client_lru) { |
2654 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2655 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2656 | t = clp->cl_time - cutoff; | |
2657 | if (clientid_val > t) | |
2658 | clientid_val = t; | |
2659 | break; | |
2660 | } | |
2661 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
2662 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2663 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2664 | expire_client(clp); |
2665 | } | |
2666 | INIT_LIST_HEAD(&reaplist); | |
2667 | spin_lock(&recall_lock); | |
2668 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2669 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2670 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
2671 | u = dp->dl_time - cutoff; | |
2672 | if (test_val > u) | |
2673 | test_val = u; | |
2674 | break; | |
2675 | } | |
2676 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
2677 | dp, dp->dl_flock); | |
2678 | list_move(&dp->dl_recall_lru, &reaplist); | |
2679 | } | |
2680 | spin_unlock(&recall_lock); | |
2681 | list_for_each_safe(pos, next, &reaplist) { | |
2682 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2683 | list_del_init(&dp->dl_recall_lru); | |
2684 | unhash_delegation(dp); | |
2685 | } | |
2686 | test_val = NFSD_LEASE_TIME; | |
2687 | list_for_each_safe(pos, next, &close_lru) { | |
2688 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
2689 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
2690 | u = sop->so_time - cutoff; | |
2691 | if (test_val > u) | |
2692 | test_val = u; | |
2693 | break; | |
2694 | } | |
2695 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
2696 | sop->so_id); | |
f044ff83 | 2697 | release_openowner(sop); |
1da177e4 LT |
2698 | } |
2699 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
2700 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
2701 | nfs4_unlock_state(); | |
2702 | return clientid_val; | |
2703 | } | |
2704 | ||
a254b246 HH |
2705 | static struct workqueue_struct *laundry_wq; |
2706 | static void laundromat_main(struct work_struct *); | |
2707 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
2708 | ||
2709 | static void | |
c4028958 | 2710 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
2711 | { |
2712 | time_t t; | |
2713 | ||
2714 | t = nfs4_laundromat(); | |
2715 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 2716 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
2717 | } |
2718 | ||
fd39ca9a | 2719 | static struct nfs4_stateowner * |
f8816512 N |
2720 | search_close_lru(u32 st_id, int flags) |
2721 | { | |
1da177e4 LT |
2722 | struct nfs4_stateowner *local = NULL; |
2723 | ||
1da177e4 LT |
2724 | if (flags & CLOSE_STATE) { |
2725 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
2726 | if (local->so_id == st_id) | |
2727 | return local; | |
2728 | } | |
2729 | } | |
2730 | return NULL; | |
2731 | } | |
2732 | ||
2733 | static inline int | |
2734 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
2735 | { | |
7eaa36e2 | 2736 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
2737 | } |
2738 | ||
2739 | static int | |
2740 | STALE_STATEID(stateid_t *stateid) | |
2741 | { | |
2742 | if (stateid->si_boot == boot_time) | |
2743 | return 0; | |
849823c5 | 2744 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
1da177e4 LT |
2745 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
2746 | stateid->si_generation); | |
2747 | return 1; | |
2748 | } | |
2749 | ||
2750 | static inline int | |
2751 | access_permit_read(unsigned long access_bmap) | |
2752 | { | |
2753 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
2754 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
2755 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
2756 | } | |
2757 | ||
2758 | static inline int | |
2759 | access_permit_write(unsigned long access_bmap) | |
2760 | { | |
2761 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
2762 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
2763 | } | |
2764 | ||
2765 | static | |
b37ad28b | 2766 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2767 | { |
b37ad28b | 2768 | __be32 status = nfserr_openmode; |
1da177e4 LT |
2769 | |
2770 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
2771 | goto out; | |
2772 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2773 | goto out; | |
2774 | status = nfs_ok; | |
2775 | out: | |
2776 | return status; | |
2777 | } | |
2778 | ||
b37ad28b | 2779 | static inline __be32 |
1da177e4 LT |
2780 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2781 | { | |
203a8c8e | 2782 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 2783 | return nfs_ok; |
af558e33 | 2784 | else if (locks_in_grace()) { |
1da177e4 LT |
2785 | /* Answer in remaining cases depends on existance of |
2786 | * conflicting state; so we must wait out the grace period. */ | |
2787 | return nfserr_grace; | |
2788 | } else if (flags & WR_STATE) | |
2789 | return nfs4_share_conflict(current_fh, | |
2790 | NFS4_SHARE_DENY_WRITE); | |
2791 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2792 | return nfs4_share_conflict(current_fh, | |
2793 | NFS4_SHARE_DENY_READ); | |
2794 | } | |
2795 | ||
2796 | /* | |
2797 | * Allow READ/WRITE during grace period on recovered state only for files | |
2798 | * that are not able to provide mandatory locking. | |
2799 | */ | |
2800 | static inline int | |
18f82731 | 2801 | grace_disallows_io(struct inode *inode) |
1da177e4 | 2802 | { |
203a8c8e | 2803 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
2804 | } |
2805 | ||
6668958f | 2806 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 2807 | { |
6668958f AA |
2808 | /* |
2809 | * When sessions are used the stateid generation number is ignored | |
2810 | * when it is zero. | |
2811 | */ | |
2812 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
2813 | goto out; | |
2814 | ||
0836f587 BF |
2815 | /* If the client sends us a stateid from the future, it's buggy: */ |
2816 | if (in->si_generation > ref->si_generation) | |
2817 | return nfserr_bad_stateid; | |
2818 | /* | |
2819 | * The following, however, can happen. For example, if the | |
2820 | * client sends an open and some IO at the same time, the open | |
2821 | * may bump si_generation while the IO is still in flight. | |
2822 | * Thanks to hard links and renames, the client never knows what | |
2823 | * file an open will affect. So it could avoid that situation | |
2824 | * only by serializing all opens and IO from the same open | |
2825 | * owner. To recover from the old_stateid error, the client | |
2826 | * will just have to retry the IO: | |
2827 | */ | |
2828 | if (in->si_generation < ref->si_generation) | |
2829 | return nfserr_old_stateid; | |
6668958f | 2830 | out: |
0836f587 BF |
2831 | return nfs_ok; |
2832 | } | |
2833 | ||
3e633079 BF |
2834 | static int is_delegation_stateid(stateid_t *stateid) |
2835 | { | |
2836 | return stateid->si_fileid == 0; | |
2837 | } | |
2838 | ||
1da177e4 LT |
2839 | /* |
2840 | * Checks for stateid operations | |
2841 | */ | |
b37ad28b | 2842 | __be32 |
dd453dfd BH |
2843 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
2844 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
2845 | { |
2846 | struct nfs4_stateid *stp = NULL; | |
2847 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 2848 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 2849 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 2850 | __be32 status; |
1da177e4 | 2851 | |
1da177e4 LT |
2852 | if (filpp) |
2853 | *filpp = NULL; | |
2854 | ||
18f82731 | 2855 | if (grace_disallows_io(ino)) |
1da177e4 LT |
2856 | return nfserr_grace; |
2857 | ||
6668958f AA |
2858 | if (nfsd4_has_session(cstate)) |
2859 | flags |= HAS_SESSION; | |
2860 | ||
1da177e4 LT |
2861 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
2862 | return check_special_stateids(current_fh, stateid, flags); | |
2863 | ||
1da177e4 LT |
2864 | status = nfserr_stale_stateid; |
2865 | if (STALE_STATEID(stateid)) | |
2866 | goto out; | |
2867 | ||
1da177e4 | 2868 | status = nfserr_bad_stateid; |
3e633079 | 2869 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 2870 | dp = find_delegation_stateid(ino, stateid); |
819a8f53 | 2871 | if (!dp) |
1da177e4 | 2872 | goto out; |
6668958f AA |
2873 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
2874 | flags); | |
0c2a498f BF |
2875 | if (status) |
2876 | goto out; | |
dc9bf700 BF |
2877 | status = nfs4_check_delegmode(dp, flags); |
2878 | if (status) | |
2879 | goto out; | |
2880 | renew_client(dp->dl_client); | |
dc9bf700 BF |
2881 | if (filpp) |
2882 | *filpp = dp->dl_vfs_file; | |
1da177e4 | 2883 | } else { /* open or lock stateid */ |
a4455be0 | 2884 | stp = find_stateid(stateid, flags); |
819a8f53 | 2885 | if (!stp) |
1da177e4 | 2886 | goto out; |
6150ef0d | 2887 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
2888 | goto out; |
2889 | if (!stp->st_stateowner->so_confirmed) | |
2890 | goto out; | |
6668958f AA |
2891 | status = check_stateid_generation(stateid, &stp->st_stateid, |
2892 | flags); | |
0c2a498f BF |
2893 | if (status) |
2894 | goto out; | |
a4455be0 BF |
2895 | status = nfs4_check_openmode(stp, flags); |
2896 | if (status) | |
1da177e4 LT |
2897 | goto out; |
2898 | renew_client(stp->st_stateowner->so_client); | |
2899 | if (filpp) | |
2900 | *filpp = stp->st_vfs_file; | |
1da177e4 LT |
2901 | } |
2902 | status = nfs_ok; | |
2903 | out: | |
2904 | return status; | |
2905 | } | |
2906 | ||
4c4cd222 N |
2907 | static inline int |
2908 | setlkflg (int type) | |
2909 | { | |
2910 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2911 | RD_STATE : WR_STATE; | |
2912 | } | |
1da177e4 LT |
2913 | |
2914 | /* | |
2915 | * Checks for sequence id mutating operations. | |
2916 | */ | |
b37ad28b | 2917 | static __be32 |
dd453dfd BH |
2918 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2919 | stateid_t *stateid, int flags, | |
2920 | struct nfs4_stateowner **sopp, | |
2921 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 2922 | { |
1da177e4 LT |
2923 | struct nfs4_stateid *stp; |
2924 | struct nfs4_stateowner *sop; | |
dd453dfd | 2925 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 2926 | __be32 status; |
1da177e4 LT |
2927 | |
2928 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | |
2929 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | |
2930 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
2931 | stateid->si_generation); | |
3a4f98bb | 2932 | |
1da177e4 LT |
2933 | *stpp = NULL; |
2934 | *sopp = NULL; | |
2935 | ||
1da177e4 | 2936 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2937 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2938 | return nfserr_bad_stateid; |
1da177e4 LT |
2939 | } |
2940 | ||
1da177e4 | 2941 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2942 | return nfserr_stale_stateid; |
6668958f AA |
2943 | |
2944 | if (nfsd4_has_session(cstate)) | |
2945 | flags |= HAS_SESSION; | |
2946 | ||
1da177e4 LT |
2947 | /* |
2948 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2949 | * the confirmed flag is incorrecly set, or the generation | |
2950 | * number is incorrect. | |
1da177e4 | 2951 | */ |
f8816512 N |
2952 | stp = find_stateid(stateid, flags); |
2953 | if (stp == NULL) { | |
2954 | /* | |
2955 | * Also, we should make sure this isn't just the result of | |
2956 | * a replayed close: | |
2957 | */ | |
2958 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2959 | if (sop == NULL) | |
2960 | return nfserr_bad_stateid; | |
2961 | *sopp = sop; | |
2962 | goto check_replay; | |
2963 | } | |
1da177e4 | 2964 | |
39325bd0 BF |
2965 | *stpp = stp; |
2966 | *sopp = sop = stp->st_stateowner; | |
2967 | ||
4c4cd222 | 2968 | if (lock) { |
4c4cd222 | 2969 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2970 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2971 | int lkflg = 0; |
b37ad28b | 2972 | __be32 status; |
4c4cd222 N |
2973 | |
2974 | lkflg = setlkflg(lock->lk_type); | |
2975 | ||
2976 | if (lock->lk_is_new) { | |
599e0a22 BF |
2977 | if (!sop->so_is_open_owner) |
2978 | return nfserr_bad_stateid; | |
60adfc50 AA |
2979 | if (!(flags & HAS_SESSION) && |
2980 | !same_clid(&clp->cl_clientid, lockclid)) | |
2981 | return nfserr_bad_stateid; | |
599e0a22 BF |
2982 | /* stp is the open stateid */ |
2983 | status = nfs4_check_openmode(stp, lkflg); | |
2984 | if (status) | |
2985 | return status; | |
2986 | } else { | |
2987 | /* stp is the lock stateid */ | |
2988 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2989 | if (status) | |
2990 | return status; | |
4c4cd222 | 2991 | } |
1da177e4 LT |
2992 | } |
2993 | ||
f3362737 | 2994 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 2995 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 2996 | return nfserr_bad_stateid; |
1da177e4 LT |
2997 | } |
2998 | ||
1da177e4 LT |
2999 | /* |
3000 | * We now validate the seqid and stateid generation numbers. | |
3001 | * For the moment, we ignore the possibility of | |
3002 | * generation number wraparound. | |
3003 | */ | |
6668958f | 3004 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
3005 | goto check_replay; |
3006 | ||
3a4f98bb | 3007 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 3008 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3009 | " unconfirmed stateowner!\n"); |
3010 | return nfserr_bad_stateid; | |
1da177e4 | 3011 | } |
3a4f98bb | 3012 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3013 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3014 | " confirmed yet!\n"); |
3015 | return nfserr_bad_stateid; | |
1da177e4 | 3016 | } |
6668958f | 3017 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
3018 | if (status) |
3019 | return status; | |
52fd004e | 3020 | renew_client(sop->so_client); |
3a4f98bb | 3021 | return nfs_ok; |
1da177e4 | 3022 | |
1da177e4 | 3023 | check_replay: |
bd9aac52 | 3024 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3025 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3026 | /* indicate replay to calling function */ |
a90b061c | 3027 | return nfserr_replay_me; |
1da177e4 | 3028 | } |
2fdada03 | 3029 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3030 | sop->so_seqid, seqid); |
3031 | *sopp = NULL; | |
3032 | return nfserr_bad_seqid; | |
1da177e4 LT |
3033 | } |
3034 | ||
b37ad28b | 3035 | __be32 |
ca364317 | 3036 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3037 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3038 | { |
b37ad28b | 3039 | __be32 status; |
1da177e4 LT |
3040 | struct nfs4_stateowner *sop; |
3041 | struct nfs4_stateid *stp; | |
3042 | ||
3043 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3044 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3045 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3046 | |
ca364317 | 3047 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3048 | if (status) |
3049 | return status; | |
1da177e4 LT |
3050 | |
3051 | nfs4_lock_state(); | |
3052 | ||
dd453dfd | 3053 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3054 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3055 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3056 | &oc->oc_stateowner, &stp, NULL))) |
3057 | goto out; | |
3058 | ||
3059 | sop = oc->oc_stateowner; | |
3060 | sop->so_confirmed = 1; | |
3061 | update_stateid(&stp->st_stateid); | |
3062 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3063 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | |
3064 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | |
3065 | stp->st_stateid.si_boot, | |
3066 | stp->st_stateid.si_stateownerid, | |
3067 | stp->st_stateid.si_fileid, | |
3068 | stp->st_stateid.si_generation); | |
c7b9a459 N |
3069 | |
3070 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3071 | out: |
f2327d9a | 3072 | if (oc->oc_stateowner) { |
1da177e4 | 3073 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3074 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3075 | } |
1da177e4 LT |
3076 | nfs4_unlock_state(); |
3077 | return status; | |
3078 | } | |
3079 | ||
3080 | ||
3081 | /* | |
3082 | * unset all bits in union bitmap (bmap) that | |
3083 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
3084 | */ | |
3085 | static void | |
3086 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
3087 | { | |
3088 | int i; | |
3089 | for (i = 1; i < 4; i++) { | |
3090 | if ((i & access) != i) | |
3091 | __clear_bit(i, bmap); | |
3092 | } | |
3093 | } | |
3094 | ||
3095 | static void | |
3096 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3097 | { | |
3098 | int i; | |
3099 | for (i = 0; i < 4; i++) { | |
3100 | if ((i & deny) != i) | |
3101 | __clear_bit(i, bmap); | |
3102 | } | |
3103 | } | |
3104 | ||
b37ad28b | 3105 | __be32 |
ca364317 BF |
3106 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3107 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3108 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3109 | { |
b37ad28b | 3110 | __be32 status; |
1da177e4 LT |
3111 | struct nfs4_stateid *stp; |
3112 | unsigned int share_access; | |
3113 | ||
3114 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3115 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3116 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3117 | |
d87a8ade | 3118 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3119 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3120 | return nfserr_inval; |
3121 | ||
3122 | nfs4_lock_state(); | |
dd453dfd | 3123 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3124 | od->od_seqid, |
1da177e4 | 3125 | &od->od_stateid, |
f3362737 | 3126 | OPEN_STATE, |
1da177e4 LT |
3127 | &od->od_stateowner, &stp, NULL))) |
3128 | goto out; | |
3129 | ||
3130 | status = nfserr_inval; | |
3131 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3132 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3133 | stp->st_access_bmap, od->od_share_access); | |
3134 | goto out; | |
3135 | } | |
3136 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3137 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3138 | stp->st_deny_bmap, od->od_share_deny); | |
3139 | goto out; | |
3140 | } | |
3141 | set_access(&share_access, stp->st_access_bmap); | |
3142 | nfs4_file_downgrade(stp->st_vfs_file, | |
3143 | share_access & ~od->od_share_access); | |
3144 | ||
3145 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
3146 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
3147 | ||
3148 | update_stateid(&stp->st_stateid); | |
3149 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3150 | status = nfs_ok; | |
3151 | out: | |
f2327d9a | 3152 | if (od->od_stateowner) { |
1da177e4 | 3153 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3154 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3155 | } |
1da177e4 LT |
3156 | nfs4_unlock_state(); |
3157 | return status; | |
3158 | } | |
3159 | ||
3160 | /* | |
3161 | * nfs4_unlock_state() called after encode | |
3162 | */ | |
b37ad28b | 3163 | __be32 |
ca364317 | 3164 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3165 | struct nfsd4_close *close) |
1da177e4 | 3166 | { |
b37ad28b | 3167 | __be32 status; |
1da177e4 LT |
3168 | struct nfs4_stateid *stp; |
3169 | ||
3170 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3171 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3172 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3173 | |
3174 | nfs4_lock_state(); | |
3175 | /* check close_lru for replay */ | |
dd453dfd | 3176 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3177 | close->cl_seqid, |
1da177e4 | 3178 | &close->cl_stateid, |
f3362737 | 3179 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3180 | &close->cl_stateowner, &stp, NULL))) |
3181 | goto out; | |
1da177e4 LT |
3182 | status = nfs_ok; |
3183 | update_stateid(&stp->st_stateid); | |
3184 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3185 | ||
04ef5954 | 3186 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3187 | release_open_stateid(stp); |
04ef5954 BF |
3188 | |
3189 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3190 | * released by the laundromat service after the lease period | |
3191 | * to enable us to handle CLOSE replay | |
3192 | */ | |
3193 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3194 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3195 | out: |
f2327d9a | 3196 | if (close->cl_stateowner) { |
1da177e4 | 3197 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3198 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3199 | } |
1da177e4 LT |
3200 | nfs4_unlock_state(); |
3201 | return status; | |
3202 | } | |
3203 | ||
b37ad28b | 3204 | __be32 |
ca364317 BF |
3205 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3206 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3207 | { |
203a8c8e BF |
3208 | struct nfs4_delegation *dp; |
3209 | stateid_t *stateid = &dr->dr_stateid; | |
3210 | struct inode *inode; | |
b37ad28b | 3211 | __be32 status; |
6668958f | 3212 | int flags = 0; |
1da177e4 | 3213 | |
ca364317 | 3214 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3215 | return status; |
3216 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3217 | |
6668958f AA |
3218 | if (nfsd4_has_session(cstate)) |
3219 | flags |= HAS_SESSION; | |
1da177e4 | 3220 | nfs4_lock_state(); |
203a8c8e BF |
3221 | status = nfserr_bad_stateid; |
3222 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3223 | goto out; | |
3224 | status = nfserr_stale_stateid; | |
3225 | if (STALE_STATEID(stateid)) | |
3226 | goto out; | |
7e0f7cf5 | 3227 | status = nfserr_bad_stateid; |
203a8c8e BF |
3228 | if (!is_delegation_stateid(stateid)) |
3229 | goto out; | |
203a8c8e BF |
3230 | dp = find_delegation_stateid(inode, stateid); |
3231 | if (!dp) | |
3232 | goto out; | |
6668958f | 3233 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3234 | if (status) |
3235 | goto out; | |
3236 | renew_client(dp->dl_client); | |
3237 | ||
3238 | unhash_delegation(dp); | |
1da177e4 | 3239 | out: |
203a8c8e BF |
3240 | nfs4_unlock_state(); |
3241 | ||
1da177e4 LT |
3242 | return status; |
3243 | } | |
3244 | ||
3245 | ||
3246 | /* | |
3247 | * Lock owner state (byte-range locks) | |
3248 | */ | |
3249 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3250 | #define LOCK_HASH_BITS 8 | |
3251 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3252 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3253 | ||
87df4de8 BH |
3254 | static inline u64 |
3255 | end_offset(u64 start, u64 len) | |
3256 | { | |
3257 | u64 end; | |
3258 | ||
3259 | end = start + len; | |
3260 | return end >= start ? end: NFS4_MAX_UINT64; | |
3261 | } | |
3262 | ||
3263 | /* last octet in a range */ | |
3264 | static inline u64 | |
3265 | last_byte_offset(u64 start, u64 len) | |
3266 | { | |
3267 | u64 end; | |
3268 | ||
3269 | BUG_ON(!len); | |
3270 | end = start + len; | |
3271 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3272 | } | |
3273 | ||
1da177e4 LT |
3274 | #define lockownerid_hashval(id) \ |
3275 | ((id) & LOCK_HASH_MASK) | |
3276 | ||
3277 | static inline unsigned int | |
3278 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3279 | struct xdr_netobj *ownername) | |
3280 | { | |
3281 | return (file_hashval(inode) + cl_id | |
3282 | + opaque_hashval(ownername->data, ownername->len)) | |
3283 | & LOCK_HASH_MASK; | |
3284 | } | |
3285 | ||
3286 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3287 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3288 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3289 | ||
fd39ca9a | 3290 | static struct nfs4_stateid * |
1da177e4 LT |
3291 | find_stateid(stateid_t *stid, int flags) |
3292 | { | |
9346eff0 | 3293 | struct nfs4_stateid *local; |
1da177e4 LT |
3294 | u32 st_id = stid->si_stateownerid; |
3295 | u32 f_id = stid->si_fileid; | |
3296 | unsigned int hashval; | |
3297 | ||
3298 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3299 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3300 | hashval = stateid_hashval(st_id, f_id); |
3301 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3302 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3303 | (local->st_stateid.si_fileid == f_id)) | |
3304 | return local; | |
3305 | } | |
3306 | } | |
9346eff0 KK |
3307 | |
3308 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3309 | hashval = stateid_hashval(st_id, f_id); |
3310 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3311 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3312 | (local->st_stateid.si_fileid == f_id)) | |
3313 | return local; | |
3314 | } | |
849823c5 | 3315 | } |
1da177e4 LT |
3316 | return NULL; |
3317 | } | |
3318 | ||
3319 | static struct nfs4_delegation * | |
3320 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3321 | { | |
13cd2184 N |
3322 | struct nfs4_file *fp; |
3323 | struct nfs4_delegation *dl; | |
1da177e4 LT |
3324 | |
3325 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | |
3326 | stid->si_boot, stid->si_stateownerid, | |
3327 | stid->si_fileid, stid->si_generation); | |
3328 | ||
1da177e4 | 3329 | fp = find_file(ino); |
13cd2184 N |
3330 | if (!fp) |
3331 | return NULL; | |
3332 | dl = find_delegation_file(fp, stid); | |
3333 | put_nfs4_file(fp); | |
3334 | return dl; | |
1da177e4 LT |
3335 | } |
3336 | ||
3337 | /* | |
3338 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3339 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3340 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3341 | * locking, this prevents us from being completely protocol-compliant. The | |
3342 | * real solution to this problem is to start using unsigned file offsets in | |
3343 | * the VFS, but this is a very deep change! | |
3344 | */ | |
3345 | static inline void | |
3346 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3347 | { | |
3348 | if (lock->fl_start < 0) | |
3349 | lock->fl_start = OFFSET_MAX; | |
3350 | if (lock->fl_end < 0) | |
3351 | lock->fl_end = OFFSET_MAX; | |
3352 | } | |
3353 | ||
d5b9026a N |
3354 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3355 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
e465a77f | 3356 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3357 | }; |
1da177e4 LT |
3358 | |
3359 | static inline void | |
3360 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3361 | { | |
d5b9026a N |
3362 | struct nfs4_stateowner *sop; |
3363 | unsigned int hval; | |
1da177e4 | 3364 | |
d5b9026a N |
3365 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3366 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
3367 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
3368 | kref_get(&sop->so_ref); |
3369 | deny->ld_sop = sop; | |
3370 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3371 | } else { |
3372 | deny->ld_sop = NULL; | |
3373 | deny->ld_clientid.cl_boot = 0; | |
3374 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3375 | } |
3376 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3377 | deny->ld_length = NFS4_MAX_UINT64; |
3378 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3379 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3380 | deny->ld_type = NFS4_READ_LT; | |
3381 | if (fl->fl_type != F_RDLCK) | |
3382 | deny->ld_type = NFS4_WRITE_LT; | |
3383 | } | |
3384 | ||
1da177e4 LT |
3385 | static struct nfs4_stateowner * |
3386 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3387 | struct xdr_netobj *owner) | |
3388 | { | |
3389 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3390 | struct nfs4_stateowner *op; | |
3391 | ||
3392 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3393 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3394 | return op; |
3395 | } | |
3396 | return NULL; | |
3397 | } | |
3398 | ||
3399 | /* | |
3400 | * Alloc a lock owner structure. | |
3401 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
3402 | * occured. | |
3403 | * | |
3404 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3405 | */ |
3406 | ||
3407 | static struct nfs4_stateowner * | |
3408 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3409 | struct nfs4_stateowner *sop; | |
3410 | struct nfs4_replay *rp; | |
3411 | unsigned int idhashval; | |
3412 | ||
3413 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3414 | return NULL; | |
3415 | idhashval = lockownerid_hashval(current_ownerid); | |
3416 | INIT_LIST_HEAD(&sop->so_idhash); | |
3417 | INIT_LIST_HEAD(&sop->so_strhash); | |
3418 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3419 | INIT_LIST_HEAD(&sop->so_stateids); |
3420 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3421 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3422 | sop->so_time = 0; | |
3423 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3424 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3425 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3426 | sop->so_is_open_owner = 0; |
3427 | sop->so_id = current_ownerid++; | |
3428 | sop->so_client = clp; | |
b59e3c0e NB |
3429 | /* It is the openowner seqid that will be incremented in encode in the |
3430 | * case of new lockowners; so increment the lock seqid manually: */ | |
3431 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3432 | sop->so_confirmed = 1; |
3433 | rp = &sop->so_replay; | |
de1ae286 | 3434 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3435 | rp->rp_buflen = 0; |
3436 | rp->rp_buf = rp->rp_ibuf; | |
3437 | return sop; | |
3438 | } | |
3439 | ||
fd39ca9a | 3440 | static struct nfs4_stateid * |
1da177e4 LT |
3441 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3442 | { | |
3443 | struct nfs4_stateid *stp; | |
3444 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3445 | ||
5ac049ac N |
3446 | stp = nfs4_alloc_stateid(); |
3447 | if (stp == NULL) | |
1da177e4 LT |
3448 | goto out; |
3449 | INIT_LIST_HEAD(&stp->st_hash); | |
3450 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3451 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3452 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3453 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3454 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3455 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3456 | stp->st_stateowner = sop; |
13cd2184 | 3457 | get_nfs4_file(fp); |
1da177e4 LT |
3458 | stp->st_file = fp; |
3459 | stp->st_stateid.si_boot = boot_time; | |
3460 | stp->st_stateid.si_stateownerid = sop->so_id; | |
3461 | stp->st_stateid.si_fileid = fp->fi_id; | |
3462 | stp->st_stateid.si_generation = 0; | |
3463 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
3464 | stp->st_access_bmap = open_stp->st_access_bmap; | |
3465 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 3466 | stp->st_openstp = open_stp; |
1da177e4 LT |
3467 | |
3468 | out: | |
3469 | return stp; | |
3470 | } | |
3471 | ||
fd39ca9a | 3472 | static int |
1da177e4 LT |
3473 | check_lock_length(u64 offset, u64 length) |
3474 | { | |
87df4de8 | 3475 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3476 | LOFF_OVERFLOW(offset, length))); |
3477 | } | |
3478 | ||
3479 | /* | |
3480 | * LOCK operation | |
3481 | */ | |
b37ad28b | 3482 | __be32 |
ca364317 | 3483 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3484 | struct nfsd4_lock *lock) |
1da177e4 | 3485 | { |
3e9e3dbe | 3486 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3487 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
3488 | struct nfs4_stateid *lock_stp; |
3489 | struct file *filp; | |
3490 | struct file_lock file_lock; | |
8dc7c311 | 3491 | struct file_lock conflock; |
b37ad28b | 3492 | __be32 status = 0; |
1da177e4 | 3493 | unsigned int strhashval; |
150b3934 | 3494 | unsigned int cmd; |
b8dd7b9a | 3495 | int err; |
1da177e4 LT |
3496 | |
3497 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3498 | (long long) lock->lk_offset, | |
3499 | (long long) lock->lk_length); | |
3500 | ||
1da177e4 LT |
3501 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3502 | return nfserr_inval; | |
3503 | ||
ca364317 | 3504 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3505 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3506 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3507 | return status; | |
3508 | } | |
3509 | ||
1da177e4 LT |
3510 | nfs4_lock_state(); |
3511 | ||
3512 | if (lock->lk_is_new) { | |
893f8770 N |
3513 | /* |
3514 | * Client indicates that this is a new lockowner. | |
3515 | * Use open owner and open stateid to create lock owner and | |
3516 | * lock stateid. | |
3517 | */ | |
1da177e4 LT |
3518 | struct nfs4_stateid *open_stp = NULL; |
3519 | struct nfs4_file *fp; | |
3520 | ||
3521 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3522 | if (!nfsd4_has_session(cstate) && |
3523 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3524 | goto out; |
1da177e4 | 3525 | |
1da177e4 | 3526 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3527 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3528 | lock->lk_new_open_seqid, |
3529 | &lock->lk_new_open_stateid, | |
f3362737 | 3530 | OPEN_STATE, |
3a65588a | 3531 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 3532 | lock); |
37515177 | 3533 | if (status) |
1da177e4 | 3534 | goto out; |
3a65588a | 3535 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
3536 | /* create lockowner and lock stateid */ |
3537 | fp = open_stp->st_file; | |
3538 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3539 | open_sop->so_client->cl_clientid.cl_id, | |
3540 | &lock->v.new.owner); | |
3e9e3dbe N |
3541 | /* XXX: Do we need to check for duplicate stateowners on |
3542 | * the same file, or should they just be allowed (and | |
3543 | * create new stateids)? */ | |
1da177e4 | 3544 | status = nfserr_resource; |
b59e3c0e NB |
3545 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3546 | open_sop->so_client, open_stp, lock); | |
3547 | if (lock_sop == NULL) | |
1da177e4 | 3548 | goto out; |
b59e3c0e | 3549 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3550 | if (lock_stp == NULL) |
1da177e4 | 3551 | goto out; |
1da177e4 LT |
3552 | } else { |
3553 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3554 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3555 | lock->lk_old_lock_seqid, |
3556 | &lock->lk_old_lock_stateid, | |
f3362737 | 3557 | LOCK_STATE, |
3a65588a | 3558 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
3559 | if (status) |
3560 | goto out; | |
3a65588a | 3561 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 3562 | } |
3a65588a | 3563 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
3564 | filp = lock_stp->st_vfs_file; |
3565 | ||
0dd395dc | 3566 | status = nfserr_grace; |
af558e33 | 3567 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3568 | goto out; |
3569 | status = nfserr_no_grace; | |
af558e33 | 3570 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3571 | goto out; |
3572 | ||
1da177e4 LT |
3573 | locks_init_lock(&file_lock); |
3574 | switch (lock->lk_type) { | |
3575 | case NFS4_READ_LT: | |
3576 | case NFS4_READW_LT: | |
3577 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 3578 | cmd = F_SETLK; |
1da177e4 LT |
3579 | break; |
3580 | case NFS4_WRITE_LT: | |
3581 | case NFS4_WRITEW_LT: | |
3582 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 3583 | cmd = F_SETLK; |
1da177e4 LT |
3584 | break; |
3585 | default: | |
3586 | status = nfserr_inval; | |
3587 | goto out; | |
3588 | } | |
b59e3c0e | 3589 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3590 | file_lock.fl_pid = current->tgid; |
3591 | file_lock.fl_file = filp; | |
3592 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3593 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3594 | |
3595 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3596 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3597 | nfs4_transform_lock_offset(&file_lock); |
3598 | ||
3599 | /* | |
3600 | * Try to lock the file in the VFS. | |
3601 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3602 | */ | |
3603 | ||
fd85b817 | 3604 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 3605 | switch (-err) { |
1da177e4 LT |
3606 | case 0: /* success! */ |
3607 | update_stateid(&lock_stp->st_stateid); | |
3608 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
3609 | sizeof(stateid_t)); | |
b8dd7b9a | 3610 | status = 0; |
eb76b3fd AA |
3611 | break; |
3612 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3613 | status = nfserr_denied; | |
3614 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3615 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3616 | break; | |
1da177e4 LT |
3617 | case (EDEADLK): |
3618 | status = nfserr_deadlock; | |
eb76b3fd | 3619 | break; |
1da177e4 | 3620 | default: |
fd85b817 | 3621 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
3622 | status = nfserr_resource; |
3623 | break; | |
1da177e4 | 3624 | } |
1da177e4 | 3625 | out: |
8a280510 | 3626 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3627 | release_lockowner(lock_sop); |
3a65588a BF |
3628 | if (lock->lk_replay_owner) { |
3629 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 3630 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 3631 | } |
1da177e4 LT |
3632 | nfs4_unlock_state(); |
3633 | return status; | |
3634 | } | |
3635 | ||
55ef1274 BF |
3636 | /* |
3637 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
3638 | * so we do a temporary open here just to get an open file to pass to | |
3639 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
3640 | * inode operation.) | |
3641 | */ | |
3642 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
3643 | { | |
3644 | struct file *file; | |
3645 | int err; | |
3646 | ||
3647 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
3648 | if (err) | |
3649 | return err; | |
3650 | err = vfs_test_lock(file, lock); | |
3651 | nfsd_close(file); | |
3652 | return err; | |
3653 | } | |
3654 | ||
1da177e4 LT |
3655 | /* |
3656 | * LOCKT operation | |
3657 | */ | |
b37ad28b | 3658 | __be32 |
ca364317 BF |
3659 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3660 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
3661 | { |
3662 | struct inode *inode; | |
1da177e4 | 3663 | struct file_lock file_lock; |
fd85b817 | 3664 | int error; |
b37ad28b | 3665 | __be32 status; |
1da177e4 | 3666 | |
af558e33 | 3667 | if (locks_in_grace()) |
1da177e4 LT |
3668 | return nfserr_grace; |
3669 | ||
3670 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
3671 | return nfserr_inval; | |
3672 | ||
3673 | lockt->lt_stateowner = NULL; | |
3674 | nfs4_lock_state(); | |
3675 | ||
3676 | status = nfserr_stale_clientid; | |
60adfc50 | 3677 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 3678 | goto out; |
1da177e4 | 3679 | |
ca364317 | 3680 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 3681 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
3682 | if (status == nfserr_symlink) |
3683 | status = nfserr_inval; | |
3684 | goto out; | |
3685 | } | |
3686 | ||
ca364317 | 3687 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
3688 | locks_init_lock(&file_lock); |
3689 | switch (lockt->lt_type) { | |
3690 | case NFS4_READ_LT: | |
3691 | case NFS4_READW_LT: | |
3692 | file_lock.fl_type = F_RDLCK; | |
3693 | break; | |
3694 | case NFS4_WRITE_LT: | |
3695 | case NFS4_WRITEW_LT: | |
3696 | file_lock.fl_type = F_WRLCK; | |
3697 | break; | |
3698 | default: | |
2fdada03 | 3699 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
3700 | status = nfserr_inval; |
3701 | goto out; | |
3702 | } | |
3703 | ||
3704 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
3705 | &lockt->lt_clientid, &lockt->lt_owner); | |
3706 | if (lockt->lt_stateowner) | |
3707 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
3708 | file_lock.fl_pid = current->tgid; | |
3709 | file_lock.fl_flags = FL_POSIX; | |
3710 | ||
3711 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 3712 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
3713 | |
3714 | nfs4_transform_lock_offset(&file_lock); | |
3715 | ||
1da177e4 | 3716 | status = nfs_ok; |
55ef1274 | 3717 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
3718 | if (error) { |
3719 | status = nfserrno(error); | |
3720 | goto out; | |
3721 | } | |
9d6a8c5c | 3722 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 3723 | status = nfserr_denied; |
9d6a8c5c | 3724 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
3725 | } |
3726 | out: | |
3727 | nfs4_unlock_state(); | |
3728 | return status; | |
3729 | } | |
3730 | ||
b37ad28b | 3731 | __be32 |
ca364317 | 3732 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3733 | struct nfsd4_locku *locku) |
1da177e4 LT |
3734 | { |
3735 | struct nfs4_stateid *stp; | |
3736 | struct file *filp = NULL; | |
3737 | struct file_lock file_lock; | |
b37ad28b | 3738 | __be32 status; |
b8dd7b9a | 3739 | int err; |
1da177e4 LT |
3740 | |
3741 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
3742 | (long long) locku->lu_offset, | |
3743 | (long long) locku->lu_length); | |
3744 | ||
3745 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
3746 | return nfserr_inval; | |
3747 | ||
3748 | nfs4_lock_state(); | |
3749 | ||
dd453dfd | 3750 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3751 | locku->lu_seqid, |
3752 | &locku->lu_stateid, | |
f3362737 | 3753 | LOCK_STATE, |
1da177e4 LT |
3754 | &locku->lu_stateowner, &stp, NULL))) |
3755 | goto out; | |
3756 | ||
3757 | filp = stp->st_vfs_file; | |
3758 | BUG_ON(!filp); | |
3759 | locks_init_lock(&file_lock); | |
3760 | file_lock.fl_type = F_UNLCK; | |
3761 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
3762 | file_lock.fl_pid = current->tgid; | |
3763 | file_lock.fl_file = filp; | |
3764 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3765 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3766 | file_lock.fl_start = locku->lu_offset; |
3767 | ||
87df4de8 | 3768 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
3769 | nfs4_transform_lock_offset(&file_lock); |
3770 | ||
3771 | /* | |
3772 | * Try to unlock the file in the VFS. | |
3773 | */ | |
fd85b817 | 3774 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 3775 | if (err) { |
fd85b817 | 3776 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
3777 | goto out_nfserr; |
3778 | } | |
3779 | /* | |
3780 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
3781 | */ | |
3782 | update_stateid(&stp->st_stateid); | |
3783 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3784 | ||
3785 | out: | |
f2327d9a | 3786 | if (locku->lu_stateowner) { |
1da177e4 | 3787 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 3788 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 3789 | } |
1da177e4 LT |
3790 | nfs4_unlock_state(); |
3791 | return status; | |
3792 | ||
3793 | out_nfserr: | |
b8dd7b9a | 3794 | status = nfserrno(err); |
1da177e4 LT |
3795 | goto out; |
3796 | } | |
3797 | ||
3798 | /* | |
3799 | * returns | |
3800 | * 1: locks held by lockowner | |
3801 | * 0: no locks held by lockowner | |
3802 | */ | |
3803 | static int | |
3804 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
3805 | { | |
3806 | struct file_lock **flpp; | |
7eaa36e2 | 3807 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
3808 | int status = 0; |
3809 | ||
3810 | lock_kernel(); | |
3811 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 3812 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
3813 | status = 1; |
3814 | goto out; | |
796dadfd | 3815 | } |
1da177e4 LT |
3816 | } |
3817 | out: | |
3818 | unlock_kernel(); | |
3819 | return status; | |
3820 | } | |
3821 | ||
b37ad28b | 3822 | __be32 |
b591480b BF |
3823 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
3824 | struct nfsd4_compound_state *cstate, | |
3825 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
3826 | { |
3827 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
3828 | struct nfs4_stateowner *sop; |
3829 | struct nfs4_stateid *stp; | |
1da177e4 | 3830 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3831 | struct list_head matches; |
3832 | int i; | |
b37ad28b | 3833 | __be32 status; |
1da177e4 LT |
3834 | |
3835 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3836 | clid->cl_boot, clid->cl_id); | |
3837 | ||
3838 | /* XXX check for lease expiration */ | |
3839 | ||
3840 | status = nfserr_stale_clientid; | |
849823c5 | 3841 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3842 | return status; |
1da177e4 LT |
3843 | |
3844 | nfs4_lock_state(); | |
3845 | ||
3e9e3dbe N |
3846 | status = nfserr_locks_held; |
3847 | /* XXX: we're doing a linear search through all the lockowners. | |
3848 | * Yipes! For now we'll just hope clients aren't really using | |
3849 | * release_lockowner much, but eventually we have to fix these | |
3850 | * data structures. */ | |
3851 | INIT_LIST_HEAD(&matches); | |
3852 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3853 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 3854 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3855 | continue; |
3856 | list_for_each_entry(stp, &sop->so_stateids, | |
3857 | st_perstateowner) { | |
3858 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3859 | goto out; | |
3860 | /* Note: so_perclient unused for lockowners, | |
3861 | * so it's OK to fool with here. */ | |
3862 | list_add(&sop->so_perclient, &matches); | |
3863 | } | |
1da177e4 | 3864 | } |
3e9e3dbe N |
3865 | } |
3866 | /* Clients probably won't expect us to return with some (but not all) | |
3867 | * of the lockowner state released; so don't release any until all | |
3868 | * have been checked. */ | |
3869 | status = nfs_ok; | |
0fa822e4 N |
3870 | while (!list_empty(&matches)) { |
3871 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3872 | so_perclient); | |
3873 | /* unhash_stateowner deletes so_perclient only | |
3874 | * for openowners. */ | |
3875 | list_del(&sop->so_perclient); | |
f044ff83 | 3876 | release_lockowner(sop); |
1da177e4 LT |
3877 | } |
3878 | out: | |
3879 | nfs4_unlock_state(); | |
3880 | return status; | |
3881 | } | |
3882 | ||
3883 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3884 | alloc_reclaim(void) |
1da177e4 | 3885 | { |
a55370a3 | 3886 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3887 | } |
3888 | ||
c7b9a459 | 3889 | int |
a1bcecd2 | 3890 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
3891 | { |
3892 | unsigned int strhashval = clientstr_hashval(name); | |
3893 | struct nfs4_client *clp; | |
3894 | ||
a1bcecd2 | 3895 | clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); |
c7b9a459 N |
3896 | return clp ? 1 : 0; |
3897 | } | |
3898 | ||
1da177e4 LT |
3899 | /* |
3900 | * failure => all reset bets are off, nfserr_no_grace... | |
3901 | */ | |
190e4fbf N |
3902 | int |
3903 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3904 | { |
3905 | unsigned int strhashval; | |
3906 | struct nfs4_client_reclaim *crp = NULL; | |
3907 | ||
a55370a3 N |
3908 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3909 | crp = alloc_reclaim(); | |
1da177e4 LT |
3910 | if (!crp) |
3911 | return 0; | |
a55370a3 | 3912 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3913 | INIT_LIST_HEAD(&crp->cr_strhash); |
3914 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3915 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3916 | reclaim_str_hashtbl_size++; |
3917 | return 1; | |
3918 | } | |
3919 | ||
3920 | static void | |
3921 | nfs4_release_reclaim(void) | |
3922 | { | |
3923 | struct nfs4_client_reclaim *crp = NULL; | |
3924 | int i; | |
3925 | ||
1da177e4 LT |
3926 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3927 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3928 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3929 | struct nfs4_client_reclaim, cr_strhash); | |
3930 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3931 | kfree(crp); |
3932 | reclaim_str_hashtbl_size--; | |
3933 | } | |
3934 | } | |
3935 | BUG_ON(reclaim_str_hashtbl_size); | |
3936 | } | |
3937 | ||
3938 | /* | |
3939 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3940 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3941 | nfs4_find_reclaim_client(clientid_t *clid) |
3942 | { | |
3943 | unsigned int strhashval; | |
3944 | struct nfs4_client *clp; | |
3945 | struct nfs4_client_reclaim *crp = NULL; | |
3946 | ||
3947 | ||
3948 | /* find clientid in conf_id_hashtbl */ | |
3949 | clp = find_confirmed_client(clid); | |
3950 | if (clp == NULL) | |
3951 | return NULL; | |
3952 | ||
a55370a3 N |
3953 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3954 | clp->cl_name.len, clp->cl_name.data, | |
3955 | clp->cl_recdir); | |
1da177e4 LT |
3956 | |
3957 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3958 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3959 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3960 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3961 | return crp; |
3962 | } | |
3963 | } | |
3964 | return NULL; | |
3965 | } | |
3966 | ||
3967 | /* | |
3968 | * Called from OPEN. Look for clientid in reclaim list. | |
3969 | */ | |
b37ad28b | 3970 | __be32 |
1da177e4 LT |
3971 | nfs4_check_open_reclaim(clientid_t *clid) |
3972 | { | |
dfc83565 | 3973 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3974 | } |
3975 | ||
ac4d8ff2 | 3976 | /* initialization to perform at module load time: */ |
1da177e4 | 3977 | |
e8ff2a84 | 3978 | int |
ac4d8ff2 | 3979 | nfs4_state_init(void) |
1da177e4 | 3980 | { |
e8ff2a84 | 3981 | int i, status; |
1da177e4 | 3982 | |
e8ff2a84 BF |
3983 | status = nfsd4_init_slabs(); |
3984 | if (status) | |
3985 | return status; | |
1da177e4 LT |
3986 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3987 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3988 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3989 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3990 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
3991 | } | |
5282fd72 ME |
3992 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
3993 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
3994 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
3995 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3996 | } | |
3997 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3998 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3999 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
4000 | } | |
4001 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
4002 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
4003 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
4004 | } | |
4005 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4006 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4007 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4008 | } | |
1da177e4 | 4009 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4010 | INIT_LIST_HEAD(&close_lru); |
4011 | INIT_LIST_HEAD(&client_lru); | |
4012 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 N |
4013 | for (i = 0; i < CLIENT_HASH_SIZE; i++) |
4014 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); | |
4015 | reclaim_str_hashtbl_size = 0; | |
e8ff2a84 | 4016 | return 0; |
ac4d8ff2 N |
4017 | } |
4018 | ||
190e4fbf N |
4019 | static void |
4020 | nfsd4_load_reboot_recovery_data(void) | |
4021 | { | |
4022 | int status; | |
4023 | ||
0964a3d3 N |
4024 | nfs4_lock_state(); |
4025 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 4026 | status = nfsd4_recdir_load(); |
0964a3d3 | 4027 | nfs4_unlock_state(); |
190e4fbf N |
4028 | if (status) |
4029 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4030 | } | |
4031 | ||
9a8db97e ME |
4032 | unsigned long |
4033 | get_nfs4_grace_period(void) | |
4034 | { | |
4035 | return max(user_lease_time, lease_time) * HZ; | |
4036 | } | |
4037 | ||
c2f1a551 MS |
4038 | /* |
4039 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4040 | * client may quite reasonably hang on to a delegation as long as it has | |
4041 | * the inode cached. This becomes an obvious problem the first time a | |
4042 | * client's inode cache approaches the size of the server's total memory. | |
4043 | * | |
4044 | * For now we avoid this problem by imposing a hard limit on the number | |
4045 | * of delegations, which varies according to the server's memory size. | |
4046 | */ | |
4047 | static void | |
4048 | set_max_delegations(void) | |
4049 | { | |
4050 | /* | |
4051 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4052 | * estimates suggest that in the worst case (where every delegation | |
4053 | * is for a different inode), a delegation could take about 1.5K, | |
4054 | * giving a worst case usage of about 6% of memory. | |
4055 | */ | |
4056 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4057 | } | |
4058 | ||
ac4d8ff2 N |
4059 | /* initialization to perform when the nfsd service is started: */ |
4060 | ||
4061 | static void | |
4062 | __nfs4_state_start(void) | |
4063 | { | |
9a8db97e | 4064 | unsigned long grace_time; |
ac4d8ff2 | 4065 | |
1da177e4 | 4066 | boot_time = get_seconds(); |
af558e33 | 4067 | grace_time = get_nfs4_grace_period(); |
d99a05ad | 4068 | lease_time = user_lease_time; |
af558e33 | 4069 | locks_start_grace(&nfsd4_manager); |
9a8db97e ME |
4070 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
4071 | grace_time/HZ); | |
58da282b | 4072 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
9a8db97e | 4073 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
c2f1a551 | 4074 | set_max_delegations(); |
1da177e4 LT |
4075 | } |
4076 | ||
e8ff2a84 | 4077 | void |
76a3550e | 4078 | nfs4_state_start(void) |
1da177e4 | 4079 | { |
1da177e4 | 4080 | if (nfs4_init) |
e8ff2a84 | 4081 | return; |
190e4fbf | 4082 | nfsd4_load_reboot_recovery_data(); |
76a3550e | 4083 | __nfs4_state_start(); |
1da177e4 | 4084 | nfs4_init = 1; |
e8ff2a84 | 4085 | return; |
1da177e4 LT |
4086 | } |
4087 | ||
1da177e4 LT |
4088 | time_t |
4089 | nfs4_lease_time(void) | |
4090 | { | |
4091 | return lease_time; | |
4092 | } | |
4093 | ||
4094 | static void | |
4095 | __nfs4_state_shutdown(void) | |
4096 | { | |
4097 | int i; | |
4098 | struct nfs4_client *clp = NULL; | |
4099 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4100 | struct list_head *pos, *next, reaplist; |
4101 | ||
1da177e4 LT |
4102 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4103 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4104 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4105 | expire_client(clp); | |
4106 | } | |
4107 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4108 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4109 | expire_client(clp); | |
4110 | } | |
4111 | } | |
4112 | INIT_LIST_HEAD(&reaplist); | |
4113 | spin_lock(&recall_lock); | |
4114 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4115 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4116 | list_move(&dp->dl_recall_lru, &reaplist); | |
4117 | } | |
4118 | spin_unlock(&recall_lock); | |
4119 | list_for_each_safe(pos, next, &reaplist) { | |
4120 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4121 | list_del_init(&dp->dl_recall_lru); | |
4122 | unhash_delegation(dp); | |
4123 | } | |
4124 | ||
190e4fbf | 4125 | nfsd4_shutdown_recdir(); |
1da177e4 | 4126 | nfs4_init = 0; |
1da177e4 LT |
4127 | } |
4128 | ||
4129 | void | |
4130 | nfs4_state_shutdown(void) | |
4131 | { | |
5e8d5c29 N |
4132 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
4133 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 4134 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4135 | nfs4_lock_state(); |
4136 | nfs4_release_reclaim(); | |
4137 | __nfs4_state_shutdown(); | |
1da177e4 LT |
4138 | nfs4_unlock_state(); |
4139 | } | |
4140 | ||
3dd98a3b JL |
4141 | /* |
4142 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4143 | * accessed when nfsd is starting. | |
4144 | */ | |
0964a3d3 N |
4145 | static void |
4146 | nfs4_set_recdir(char *recdir) | |
4147 | { | |
0964a3d3 | 4148 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4149 | } |
4150 | ||
4151 | /* | |
4152 | * Change the NFSv4 recovery directory to recdir. | |
4153 | */ | |
4154 | int | |
4155 | nfs4_reset_recoverydir(char *recdir) | |
4156 | { | |
4157 | int status; | |
a63bb996 | 4158 | struct path path; |
0964a3d3 | 4159 | |
a63bb996 | 4160 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4161 | if (status) |
4162 | return status; | |
4163 | status = -ENOTDIR; | |
a63bb996 | 4164 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4165 | nfs4_set_recdir(recdir); |
4166 | status = 0; | |
4167 | } | |
a63bb996 | 4168 | path_put(&path); |
0964a3d3 N |
4169 | return status; |
4170 | } | |
4171 | ||
3dd98a3b JL |
4172 | char * |
4173 | nfs4_recoverydir(void) | |
4174 | { | |
4175 | return user_recovery_dirname; | |
4176 | } | |
4177 | ||
1da177e4 LT |
4178 | /* |
4179 | * Called when leasetime is changed. | |
4180 | * | |
d99a05ad N |
4181 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
4182 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
4183 | * we start to register any changes in lease time. If the administrator | |
4184 | * really wants to change the lease time *now*, they can go ahead and bring | |
4185 | * nfsd down and then back up again after changing the lease time. | |
3dd98a3b JL |
4186 | * |
4187 | * user_lease_time is protected by nfsd_mutex since it's only really accessed | |
4188 | * when nfsd is starting | |
1da177e4 LT |
4189 | */ |
4190 | void | |
4191 | nfs4_reset_lease(time_t leasetime) | |
4192 | { | |
d99a05ad | 4193 | user_lease_time = leasetime; |
1da177e4 | 4194 | } |