Commit | Line | Data |
---|---|---|
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; | |
c237dc03 | 185 | struct nfs4_cb_conn *cb = &stp->st_stateowner->so_client->cl_cb_conn; |
1da177e4 LT |
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; | |
b53d40c5 | 206 | dp->dl_ident = cb->cb_ident; |
78155ed7 | 207 | dp->dl_stateid.si_boot = get_seconds(); |
1da177e4 LT |
208 | dp->dl_stateid.si_stateownerid = current_delegid++; |
209 | dp->dl_stateid.si_fileid = 0; | |
210 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 211 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
212 | dp->dl_time = 0; |
213 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
214 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
215 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
1da177e4 LT |
216 | return dp; |
217 | } | |
218 | ||
219 | void | |
220 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
221 | { | |
222 | if (atomic_dec_and_test(&dp->dl_count)) { | |
223 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 224 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 225 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 226 | num_delegations--; |
1da177e4 LT |
227 | } |
228 | } | |
229 | ||
230 | /* Remove the associated file_lock first, then remove the delegation. | |
231 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
232 | * the i_flock list, eventually calling nfsd's lock_manager | |
233 | * fl_release_callback. | |
234 | */ | |
235 | static void | |
236 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
237 | { | |
238 | struct file *filp = dp->dl_vfs_file; | |
239 | ||
240 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
241 | dp->dl_vfs_file = NULL; | |
242 | /* The following nfsd_close may not actually close the file, | |
243 | * but we want to remove the lease in any case. */ | |
c907132d | 244 | if (dp->dl_flock) |
a9933cea | 245 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
1da177e4 | 246 | nfsd_close(filp); |
1da177e4 LT |
247 | } |
248 | ||
249 | /* Called under the state lock. */ | |
250 | static void | |
251 | unhash_delegation(struct nfs4_delegation *dp) | |
252 | { | |
ea1da636 N |
253 | list_del_init(&dp->dl_perfile); |
254 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
255 | spin_lock(&recall_lock); |
256 | list_del_init(&dp->dl_recall_lru); | |
257 | spin_unlock(&recall_lock); | |
258 | nfs4_close_delegation(dp); | |
259 | nfs4_put_delegation(dp); | |
260 | } | |
261 | ||
262 | /* | |
263 | * SETCLIENTID state | |
264 | */ | |
265 | ||
266 | /* Hash tables for nfs4_clientid state */ | |
267 | #define CLIENT_HASH_BITS 4 | |
268 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
269 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
270 | ||
271 | #define clientid_hashval(id) \ | |
272 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
273 | #define clientstr_hashval(name) \ |
274 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
275 | /* |
276 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
277 | * used in reboot/reset lease grace period processing | |
278 | * | |
279 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
280 | * setclientid_confirmed info. | |
281 | * | |
282 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
283 | * setclientid info. | |
284 | * | |
285 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
286 | * for lease renewal. | |
287 | * | |
288 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
289 | * for last close replay. | |
290 | */ | |
291 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
292 | static int reclaim_str_hashtbl_size = 0; | |
293 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
294 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
295 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
296 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
297 | static struct list_head client_lru; | |
298 | static struct list_head close_lru; | |
299 | ||
2283963f BF |
300 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
301 | { | |
302 | list_del(&stp->st_hash); | |
303 | list_del(&stp->st_perfile); | |
304 | list_del(&stp->st_perstateowner); | |
305 | } | |
306 | ||
307 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
308 | { | |
309 | put_nfs4_file(stp->st_file); | |
310 | kmem_cache_free(stateid_slab, stp); | |
311 | } | |
312 | ||
313 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
314 | { | |
315 | unhash_generic_stateid(stp); | |
316 | locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); | |
317 | free_generic_stateid(stp); | |
318 | } | |
319 | ||
f044ff83 BF |
320 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
321 | { | |
322 | struct nfs4_stateid *stp; | |
323 | ||
324 | list_del(&sop->so_idhash); | |
325 | list_del(&sop->so_strhash); | |
326 | list_del(&sop->so_perstateid); | |
327 | while (!list_empty(&sop->so_stateids)) { | |
328 | stp = list_first_entry(&sop->so_stateids, | |
329 | struct nfs4_stateid, st_perstateowner); | |
330 | release_lock_stateid(stp); | |
331 | } | |
332 | } | |
333 | ||
334 | static void release_lockowner(struct nfs4_stateowner *sop) | |
335 | { | |
336 | unhash_lockowner(sop); | |
337 | nfs4_put_stateowner(sop); | |
338 | } | |
339 | ||
f1d110ca BF |
340 | static void |
341 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
342 | { | |
343 | struct nfs4_stateowner *lock_sop; | |
344 | ||
345 | while (!list_empty(&open_stp->st_lockowners)) { | |
346 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
347 | struct nfs4_stateowner, so_perstateid); | |
348 | /* list_del(&open_stp->st_lockowners); */ | |
349 | BUG_ON(lock_sop->so_is_open_owner); | |
f044ff83 | 350 | release_lockowner(lock_sop); |
f1d110ca BF |
351 | } |
352 | } | |
353 | ||
2283963f BF |
354 | static void release_open_stateid(struct nfs4_stateid *stp) |
355 | { | |
356 | unhash_generic_stateid(stp); | |
357 | release_stateid_lockowners(stp); | |
358 | nfsd_close(stp->st_vfs_file); | |
359 | free_generic_stateid(stp); | |
360 | } | |
361 | ||
f044ff83 | 362 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
363 | { |
364 | struct nfs4_stateid *stp; | |
365 | ||
366 | list_del(&sop->so_idhash); | |
367 | list_del(&sop->so_strhash); | |
f044ff83 BF |
368 | list_del(&sop->so_perclient); |
369 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 370 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
371 | stp = list_first_entry(&sop->so_stateids, |
372 | struct nfs4_stateid, st_perstateowner); | |
373 | release_open_stateid(stp); | |
f1d110ca BF |
374 | } |
375 | } | |
376 | ||
f044ff83 | 377 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 378 | { |
f044ff83 | 379 | unhash_openowner(sop); |
f1d110ca BF |
380 | list_del(&sop->so_close_lru); |
381 | nfs4_put_stateowner(sop); | |
382 | } | |
383 | ||
5282fd72 ME |
384 | static DEFINE_SPINLOCK(sessionid_lock); |
385 | #define SESSION_HASH_SIZE 512 | |
386 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
387 | ||
388 | static inline int | |
389 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
390 | { | |
391 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
392 | ||
393 | return sid->sequence % SESSION_HASH_SIZE; | |
394 | } | |
395 | ||
396 | static inline void | |
397 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
398 | { | |
399 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
400 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
401 | } | |
402 | ||
ec6b5d7b AA |
403 | static void |
404 | gen_sessionid(struct nfsd4_session *ses) | |
405 | { | |
406 | struct nfs4_client *clp = ses->se_client; | |
407 | struct nfsd4_sessionid *sid; | |
408 | ||
409 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
410 | sid->clientid = clp->cl_clientid; | |
411 | sid->sequence = current_sessionid++; | |
412 | sid->reserved = 0; | |
413 | } | |
414 | ||
415 | /* | |
416 | * Give the client the number of slots it requests bound by | |
417 | * NFSD_MAX_SLOTS_PER_SESSION and by sv_drc_max_pages. | |
418 | * | |
419 | * If we run out of pages (sv_drc_pages_used == sv_drc_max_pages) we | |
420 | * should (up to a point) re-negotiate active sessions and reduce their | |
421 | * slot usage to make rooom for new connections. For now we just fail the | |
422 | * create session. | |
423 | */ | |
424 | static int set_forechannel_maxreqs(struct nfsd4_channel_attrs *fchan) | |
425 | { | |
426 | int status = 0, np = fchan->maxreqs * NFSD_PAGES_PER_SLOT; | |
427 | ||
428 | spin_lock(&nfsd_serv->sv_lock); | |
429 | if (np + nfsd_serv->sv_drc_pages_used > nfsd_serv->sv_drc_max_pages) | |
430 | np = nfsd_serv->sv_drc_max_pages - nfsd_serv->sv_drc_pages_used; | |
431 | nfsd_serv->sv_drc_pages_used += np; | |
432 | spin_unlock(&nfsd_serv->sv_lock); | |
433 | ||
434 | if (np <= 0) { | |
435 | status = nfserr_resource; | |
436 | fchan->maxreqs = 0; | |
437 | } else | |
438 | fchan->maxreqs = np / NFSD_PAGES_PER_SLOT; | |
439 | ||
440 | return status; | |
441 | } | |
442 | ||
443 | /* | |
444 | * fchan holds the client values on input, and the server values on output | |
445 | */ | |
446 | static int init_forechannel_attrs(struct svc_rqst *rqstp, | |
447 | struct nfsd4_session *session, | |
448 | struct nfsd4_channel_attrs *fchan) | |
449 | { | |
450 | int status = 0; | |
451 | __u32 maxcount = svc_max_payload(rqstp); | |
452 | ||
453 | /* headerpadsz set to zero in encode routine */ | |
454 | ||
455 | /* Use the client's max request and max response size if possible */ | |
456 | if (fchan->maxreq_sz > maxcount) | |
457 | fchan->maxreq_sz = maxcount; | |
458 | session->se_fmaxreq_sz = fchan->maxreq_sz; | |
459 | ||
460 | if (fchan->maxresp_sz > maxcount) | |
461 | fchan->maxresp_sz = maxcount; | |
462 | session->se_fmaxresp_sz = fchan->maxresp_sz; | |
463 | ||
464 | /* Set the max response cached size our default which is | |
465 | * a multiple of PAGE_SIZE and small */ | |
466 | session->se_fmaxresp_cached = NFSD_PAGES_PER_SLOT * PAGE_SIZE; | |
467 | fchan->maxresp_cached = session->se_fmaxresp_cached; | |
468 | ||
469 | /* Use the client's maxops if possible */ | |
470 | if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) | |
471 | fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; | |
472 | session->se_fmaxops = fchan->maxops; | |
473 | ||
474 | /* try to use the client requested number of slots */ | |
475 | if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) | |
476 | fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; | |
477 | ||
478 | /* FIXME: Error means no more DRC pages so the server should | |
479 | * recover pages from existing sessions. For now fail session | |
480 | * creation. | |
481 | */ | |
482 | status = set_forechannel_maxreqs(fchan); | |
483 | ||
484 | session->se_fnumslots = fchan->maxreqs; | |
485 | return status; | |
486 | } | |
487 | ||
488 | static int | |
489 | alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, | |
490 | struct nfsd4_create_session *cses) | |
491 | { | |
492 | struct nfsd4_session *new, tmp; | |
493 | int idx, status = nfserr_resource, slotsize; | |
494 | ||
495 | memset(&tmp, 0, sizeof(tmp)); | |
496 | ||
497 | /* FIXME: For now, we just accept the client back channel attributes. */ | |
498 | status = init_forechannel_attrs(rqstp, &tmp, &cses->fore_channel); | |
499 | if (status) | |
500 | goto out; | |
501 | ||
502 | /* allocate struct nfsd4_session and slot table in one piece */ | |
503 | slotsize = tmp.se_fnumslots * sizeof(struct nfsd4_slot); | |
504 | new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); | |
505 | if (!new) | |
506 | goto out; | |
507 | ||
508 | memcpy(new, &tmp, sizeof(*new)); | |
509 | ||
510 | new->se_client = clp; | |
511 | gen_sessionid(new); | |
512 | idx = hash_sessionid(&new->se_sessionid); | |
513 | memcpy(clp->cl_sessionid.data, new->se_sessionid.data, | |
514 | NFS4_MAX_SESSIONID_LEN); | |
515 | ||
516 | new->se_flags = cses->flags; | |
517 | kref_init(&new->se_ref); | |
518 | spin_lock(&sessionid_lock); | |
519 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); | |
520 | list_add(&new->se_perclnt, &clp->cl_sessions); | |
521 | spin_unlock(&sessionid_lock); | |
522 | ||
523 | status = nfs_ok; | |
524 | out: | |
525 | return status; | |
526 | } | |
527 | ||
5282fd72 ME |
528 | /* caller must hold sessionid_lock */ |
529 | static struct nfsd4_session * | |
530 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
531 | { | |
532 | struct nfsd4_session *elem; | |
533 | int idx; | |
534 | ||
535 | dump_sessionid(__func__, sessionid); | |
536 | idx = hash_sessionid(sessionid); | |
537 | dprintk("%s: idx is %d\n", __func__, idx); | |
538 | /* Search in the appropriate list */ | |
539 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
540 | dump_sessionid("list traversal", &elem->se_sessionid); | |
541 | if (!memcmp(elem->se_sessionid.data, sessionid->data, | |
542 | NFS4_MAX_SESSIONID_LEN)) { | |
543 | return elem; | |
544 | } | |
545 | } | |
546 | ||
547 | dprintk("%s: session not found\n", __func__); | |
548 | return NULL; | |
549 | } | |
550 | ||
551 | /* caller must hold sessionid_lock */ | |
7116ed6b | 552 | static void |
5282fd72 | 553 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
554 | { |
555 | list_del(&ses->se_hash); | |
556 | list_del(&ses->se_perclnt); | |
5282fd72 ME |
557 | } |
558 | ||
559 | static void | |
560 | release_session(struct nfsd4_session *ses) | |
561 | { | |
562 | spin_lock(&sessionid_lock); | |
563 | unhash_session(ses); | |
564 | spin_unlock(&sessionid_lock); | |
7116ed6b AA |
565 | nfsd4_put_session(ses); |
566 | } | |
567 | ||
14778a13 AA |
568 | static void nfsd4_release_respages(struct page **respages, short resused); |
569 | ||
7116ed6b AA |
570 | void |
571 | free_session(struct kref *kref) | |
572 | { | |
573 | struct nfsd4_session *ses; | |
14778a13 | 574 | int i; |
7116ed6b AA |
575 | |
576 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
14778a13 AA |
577 | for (i = 0; i < ses->se_fnumslots; i++) { |
578 | struct nfsd4_cache_entry *e = &ses->se_slots[i].sl_cache_entry; | |
579 | nfsd4_release_respages(e->ce_respages, e->ce_resused); | |
580 | } | |
7116ed6b AA |
581 | kfree(ses->se_slots); |
582 | kfree(ses); | |
583 | } | |
584 | ||
1da177e4 LT |
585 | static inline void |
586 | renew_client(struct nfs4_client *clp) | |
587 | { | |
588 | /* | |
589 | * Move client to the end to the LRU list. | |
590 | */ | |
591 | dprintk("renewing client (clientid %08x/%08x)\n", | |
592 | clp->cl_clientid.cl_boot, | |
593 | clp->cl_clientid.cl_id); | |
594 | list_move_tail(&clp->cl_lru, &client_lru); | |
595 | clp->cl_time = get_seconds(); | |
596 | } | |
597 | ||
598 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
599 | static int | |
600 | STALE_CLIENTID(clientid_t *clid) | |
601 | { | |
602 | if (clid->cl_boot == boot_time) | |
603 | return 0; | |
60adfc50 AA |
604 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
605 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
606 | return 1; |
607 | } | |
608 | ||
609 | /* | |
610 | * XXX Should we use a slab cache ? | |
611 | * This type of memory management is somewhat inefficient, but we use it | |
612 | * anyway since SETCLIENTID is not a common operation. | |
613 | */ | |
35bba9a3 | 614 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
615 | { |
616 | struct nfs4_client *clp; | |
617 | ||
35bba9a3 BF |
618 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
619 | if (clp == NULL) | |
620 | return NULL; | |
621 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
622 | if (clp->cl_name.data == NULL) { | |
623 | kfree(clp); | |
624 | return NULL; | |
1da177e4 | 625 | } |
35bba9a3 BF |
626 | memcpy(clp->cl_name.data, name.data, name.len); |
627 | clp->cl_name.len = name.len; | |
1da177e4 LT |
628 | return clp; |
629 | } | |
630 | ||
1b1a9b31 BF |
631 | static void |
632 | shutdown_callback_client(struct nfs4_client *clp) | |
633 | { | |
c237dc03 | 634 | struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client; |
1b1a9b31 | 635 | |
1b1a9b31 | 636 | if (clnt) { |
404ec117 BF |
637 | /* |
638 | * Callback threads take a reference on the client, so there | |
639 | * should be no outstanding callbacks at this point. | |
640 | */ | |
c237dc03 | 641 | clp->cl_cb_conn.cb_client = NULL; |
1b1a9b31 BF |
642 | rpc_shutdown_client(clnt); |
643 | } | |
c237dc03 BF |
644 | if (clp->cl_cb_conn.cb_cred) { |
645 | put_rpccred(clp->cl_cb_conn.cb_cred); | |
646 | clp->cl_cb_conn.cb_cred = NULL; | |
3cef9ab2 | 647 | } |
1b1a9b31 BF |
648 | } |
649 | ||
1da177e4 LT |
650 | static inline void |
651 | free_client(struct nfs4_client *clp) | |
652 | { | |
1b1a9b31 | 653 | shutdown_callback_client(clp); |
38eb76a5 AA |
654 | nfsd4_release_respages(clp->cl_slot.sl_cache_entry.ce_respages, |
655 | clp->cl_slot.sl_cache_entry.ce_resused); | |
1da177e4 LT |
656 | if (clp->cl_cred.cr_group_info) |
657 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 658 | kfree(clp->cl_principal); |
1da177e4 LT |
659 | kfree(clp->cl_name.data); |
660 | kfree(clp); | |
661 | } | |
662 | ||
663 | void | |
664 | put_nfs4_client(struct nfs4_client *clp) | |
665 | { | |
666 | if (atomic_dec_and_test(&clp->cl_count)) | |
667 | free_client(clp); | |
668 | } | |
669 | ||
670 | static void | |
671 | expire_client(struct nfs4_client *clp) | |
672 | { | |
673 | struct nfs4_stateowner *sop; | |
674 | struct nfs4_delegation *dp; | |
1da177e4 LT |
675 | struct list_head reaplist; |
676 | ||
677 | dprintk("NFSD: expire_client cl_count %d\n", | |
678 | atomic_read(&clp->cl_count)); | |
679 | ||
1da177e4 LT |
680 | INIT_LIST_HEAD(&reaplist); |
681 | spin_lock(&recall_lock); | |
ea1da636 N |
682 | while (!list_empty(&clp->cl_delegations)) { |
683 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
684 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
685 | dp->dl_flock); | |
ea1da636 | 686 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
687 | list_move(&dp->dl_recall_lru, &reaplist); |
688 | } | |
689 | spin_unlock(&recall_lock); | |
690 | while (!list_empty(&reaplist)) { | |
691 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
692 | list_del_init(&dp->dl_recall_lru); | |
693 | unhash_delegation(dp); | |
694 | } | |
695 | list_del(&clp->cl_idhash); | |
696 | list_del(&clp->cl_strhash); | |
697 | list_del(&clp->cl_lru); | |
ea1da636 N |
698 | while (!list_empty(&clp->cl_openowners)) { |
699 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 700 | release_openowner(sop); |
1da177e4 | 701 | } |
c4bf7868 ME |
702 | while (!list_empty(&clp->cl_sessions)) { |
703 | struct nfsd4_session *ses; | |
704 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
705 | se_perclnt); | |
706 | release_session(ses); | |
707 | } | |
1da177e4 LT |
708 | put_nfs4_client(clp); |
709 | } | |
710 | ||
35bba9a3 BF |
711 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) |
712 | { | |
1da177e4 LT |
713 | struct nfs4_client *clp; |
714 | ||
35bba9a3 BF |
715 | clp = alloc_client(name); |
716 | if (clp == NULL) | |
717 | return NULL; | |
a55370a3 | 718 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
1da177e4 | 719 | atomic_set(&clp->cl_count, 1); |
c237dc03 | 720 | atomic_set(&clp->cl_cb_conn.cb_set, 0); |
1da177e4 LT |
721 | INIT_LIST_HEAD(&clp->cl_idhash); |
722 | INIT_LIST_HEAD(&clp->cl_strhash); | |
ea1da636 N |
723 | INIT_LIST_HEAD(&clp->cl_openowners); |
724 | INIT_LIST_HEAD(&clp->cl_delegations); | |
9fb87070 | 725 | INIT_LIST_HEAD(&clp->cl_sessions); |
1da177e4 | 726 | INIT_LIST_HEAD(&clp->cl_lru); |
1da177e4 LT |
727 | return clp; |
728 | } | |
729 | ||
35bba9a3 BF |
730 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
731 | { | |
732 | memcpy(target->cl_verifier.data, source->data, | |
733 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
734 | } |
735 | ||
35bba9a3 BF |
736 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
737 | { | |
1da177e4 LT |
738 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
739 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
740 | } | |
741 | ||
35bba9a3 BF |
742 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
743 | { | |
1da177e4 LT |
744 | target->cr_uid = source->cr_uid; |
745 | target->cr_gid = source->cr_gid; | |
746 | target->cr_group_info = source->cr_group_info; | |
747 | get_group_info(target->cr_group_info); | |
748 | } | |
749 | ||
35bba9a3 | 750 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 751 | { |
a55370a3 | 752 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
753 | } |
754 | ||
755 | static int | |
599e0a22 BF |
756 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
757 | { | |
758 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
759 | } |
760 | ||
761 | static int | |
599e0a22 BF |
762 | same_clid(clientid_t *cl1, clientid_t *cl2) |
763 | { | |
764 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
765 | } |
766 | ||
767 | /* XXX what about NGROUP */ | |
768 | static int | |
599e0a22 BF |
769 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
770 | { | |
771 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
772 | } |
773 | ||
5ec7b46c BF |
774 | static void gen_clid(struct nfs4_client *clp) |
775 | { | |
776 | static u32 current_clientid = 1; | |
777 | ||
1da177e4 LT |
778 | clp->cl_clientid.cl_boot = boot_time; |
779 | clp->cl_clientid.cl_id = current_clientid++; | |
780 | } | |
781 | ||
deda2faa BF |
782 | static void gen_confirm(struct nfs4_client *clp) |
783 | { | |
784 | static u32 i; | |
785 | u32 *p; | |
1da177e4 | 786 | |
1da177e4 | 787 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
788 | *p++ = get_seconds(); |
789 | *p++ = i++; | |
1da177e4 LT |
790 | } |
791 | ||
35bba9a3 BF |
792 | static int check_name(struct xdr_netobj name) |
793 | { | |
1da177e4 LT |
794 | if (name.len == 0) |
795 | return 0; | |
796 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 797 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
798 | return 0; |
799 | } | |
800 | return 1; | |
801 | } | |
802 | ||
fd39ca9a | 803 | static void |
1da177e4 LT |
804 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
805 | { | |
806 | unsigned int idhashval; | |
807 | ||
808 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
809 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
810 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
811 | list_add_tail(&clp->cl_lru, &client_lru); | |
812 | clp->cl_time = get_seconds(); | |
813 | } | |
814 | ||
fd39ca9a | 815 | static void |
1da177e4 LT |
816 | move_to_confirmed(struct nfs4_client *clp) |
817 | { | |
818 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
819 | unsigned int strhashval; | |
820 | ||
821 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
822 | list_del_init(&clp->cl_strhash); | |
f116629d | 823 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 824 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
825 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
826 | renew_client(clp); | |
827 | } | |
828 | ||
829 | static struct nfs4_client * | |
830 | find_confirmed_client(clientid_t *clid) | |
831 | { | |
832 | struct nfs4_client *clp; | |
833 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
834 | ||
835 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 836 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
837 | return clp; |
838 | } | |
839 | return NULL; | |
840 | } | |
841 | ||
842 | static struct nfs4_client * | |
843 | find_unconfirmed_client(clientid_t *clid) | |
844 | { | |
845 | struct nfs4_client *clp; | |
846 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
847 | ||
848 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 849 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
850 | return clp; |
851 | } | |
852 | return NULL; | |
853 | } | |
854 | ||
a1bcecd2 AA |
855 | /* |
856 | * Return 1 iff clp's clientid establishment method matches the use_exchange_id | |
857 | * parameter. Matching is based on the fact the at least one of the | |
858 | * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 | |
859 | * | |
860 | * FIXME: we need to unify the clientid namespaces for nfsv4.x | |
861 | * and correctly deal with client upgrade/downgrade in EXCHANGE_ID | |
862 | * and SET_CLIENTID{,_CONFIRM} | |
863 | */ | |
864 | static inline int | |
865 | match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) | |
866 | { | |
867 | bool has_exchange_flags = (clp->cl_exchange_flags != 0); | |
868 | return use_exchange_id == has_exchange_flags; | |
869 | } | |
870 | ||
28ce6054 | 871 | static struct nfs4_client * |
a1bcecd2 AA |
872 | find_confirmed_client_by_str(const char *dname, unsigned int hashval, |
873 | bool use_exchange_id) | |
28ce6054 N |
874 | { |
875 | struct nfs4_client *clp; | |
876 | ||
877 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
878 | if (same_name(clp->cl_recdir, dname) && |
879 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
880 | return clp; |
881 | } | |
882 | return NULL; | |
883 | } | |
884 | ||
885 | static struct nfs4_client * | |
a1bcecd2 AA |
886 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, |
887 | bool use_exchange_id) | |
28ce6054 N |
888 | { |
889 | struct nfs4_client *clp; | |
890 | ||
891 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
892 | if (same_name(clp->cl_recdir, dname) && |
893 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
894 | return clp; |
895 | } | |
896 | return NULL; | |
897 | } | |
898 | ||
1da177e4 LT |
899 | /* a helper function for parse_callback */ |
900 | static int | |
901 | parse_octet(unsigned int *lenp, char **addrp) | |
902 | { | |
903 | unsigned int len = *lenp; | |
904 | char *p = *addrp; | |
905 | int n = -1; | |
906 | char c; | |
907 | ||
908 | for (;;) { | |
909 | if (!len) | |
910 | break; | |
911 | len--; | |
912 | c = *p++; | |
913 | if (c == '.') | |
914 | break; | |
915 | if ((c < '0') || (c > '9')) { | |
916 | n = -1; | |
917 | break; | |
918 | } | |
919 | if (n < 0) | |
920 | n = 0; | |
921 | n = (n * 10) + (c - '0'); | |
922 | if (n > 255) { | |
923 | n = -1; | |
924 | break; | |
925 | } | |
926 | } | |
927 | *lenp = len; | |
928 | *addrp = p; | |
929 | return n; | |
930 | } | |
931 | ||
932 | /* parse and set the setclientid ipv4 callback address */ | |
fd39ca9a | 933 | static int |
1da177e4 LT |
934 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
935 | { | |
936 | int temp = 0; | |
937 | u32 cbaddr = 0; | |
938 | u16 cbport = 0; | |
939 | u32 addrlen = addr_len; | |
940 | char *addr = addr_val; | |
941 | int i, shift; | |
942 | ||
943 | /* ipaddress */ | |
944 | shift = 24; | |
945 | for(i = 4; i > 0 ; i--) { | |
946 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
947 | return 0; | |
948 | } | |
949 | cbaddr |= (temp << shift); | |
950 | if (shift > 0) | |
951 | shift -= 8; | |
952 | } | |
953 | *cbaddrp = cbaddr; | |
954 | ||
955 | /* port */ | |
956 | shift = 8; | |
957 | for(i = 2; i > 0 ; i--) { | |
958 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
959 | return 0; | |
960 | } | |
961 | cbport |= (temp << shift); | |
962 | if (shift > 0) | |
963 | shift -= 8; | |
964 | } | |
965 | *cbportp = cbport; | |
966 | return 1; | |
967 | } | |
968 | ||
fd39ca9a | 969 | static void |
1da177e4 LT |
970 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
971 | { | |
c237dc03 | 972 | struct nfs4_cb_conn *cb = &clp->cl_cb_conn; |
1da177e4 LT |
973 | |
974 | /* Currently, we only support tcp for the callback channel */ | |
975 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) | |
976 | goto out_err; | |
977 | ||
978 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, | |
979 | &cb->cb_addr, &cb->cb_port))) | |
980 | goto out_err; | |
981 | cb->cb_prog = se->se_callback_prog; | |
982 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
983 | return; |
984 | out_err: | |
849823c5 | 985 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
986 | "will not receive delegations\n", |
987 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
988 | ||
1da177e4 LT |
989 | return; |
990 | } | |
991 | ||
074fe897 AA |
992 | void |
993 | nfsd4_set_statp(struct svc_rqst *rqstp, __be32 *statp) | |
994 | { | |
995 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
996 | ||
997 | resp->cstate.statp = statp; | |
998 | } | |
999 | ||
1000 | /* | |
1001 | * Dereference the result pages. | |
1002 | */ | |
1003 | static void | |
1004 | nfsd4_release_respages(struct page **respages, short resused) | |
1005 | { | |
1006 | int i; | |
1007 | ||
1008 | dprintk("--> %s\n", __func__); | |
1009 | for (i = 0; i < resused; i++) { | |
1010 | if (!respages[i]) | |
1011 | continue; | |
1012 | put_page(respages[i]); | |
1013 | respages[i] = NULL; | |
1014 | } | |
1015 | } | |
1016 | ||
1017 | static void | |
1018 | nfsd4_copy_pages(struct page **topages, struct page **frompages, short count) | |
1019 | { | |
1020 | int i; | |
1021 | ||
1022 | for (i = 0; i < count; i++) { | |
1023 | topages[i] = frompages[i]; | |
1024 | if (!topages[i]) | |
1025 | continue; | |
1026 | get_page(topages[i]); | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | /* | |
1031 | * Cache the reply pages up to NFSD_PAGES_PER_SLOT + 1, clearing the previous | |
1032 | * pages. We add a page to NFSD_PAGES_PER_SLOT for the case where the total | |
1033 | * length of the XDR response is less than se_fmaxresp_cached | |
1034 | * (NFSD_PAGES_PER_SLOT * PAGE_SIZE) but the xdr_buf pages is used for a | |
1035 | * of the reply (e.g. readdir). | |
1036 | * | |
1037 | * Store the base and length of the rq_req.head[0] page | |
1038 | * of the NFSv4.1 data, just past the rpc header. | |
1039 | */ | |
1040 | void | |
1041 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
1042 | { | |
1043 | struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; | |
1044 | struct svc_rqst *rqstp = resp->rqstp; | |
1045 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1046 | struct nfsd4_op *op = &args->ops[resp->opcnt]; | |
1047 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
1048 | ||
1049 | dprintk("--> %s entry %p\n", __func__, entry); | |
1050 | ||
1051 | /* Don't cache a failed OP_SEQUENCE. */ | |
1052 | if (resp->opcnt == 1 && op->opnum == OP_SEQUENCE && resp->cstate.status) | |
1053 | return; | |
bf864a31 | 1054 | |
074fe897 | 1055 | nfsd4_release_respages(entry->ce_respages, entry->ce_resused); |
bf864a31 AA |
1056 | entry->ce_opcnt = resp->opcnt; |
1057 | entry->ce_status = resp->cstate.status; | |
1058 | ||
1059 | /* | |
1060 | * Don't need a page to cache just the sequence operation - the slot | |
1061 | * does this for us! | |
1062 | */ | |
1063 | ||
1064 | if (nfsd4_not_cached(resp)) { | |
1065 | entry->ce_resused = 0; | |
1066 | entry->ce_rpchdrlen = 0; | |
1067 | dprintk("%s Just cache SEQUENCE. ce_cachethis %d\n", __func__, | |
1068 | resp->cstate.slot->sl_cache_entry.ce_cachethis); | |
1069 | return; | |
1070 | } | |
074fe897 AA |
1071 | entry->ce_resused = rqstp->rq_resused; |
1072 | if (entry->ce_resused > NFSD_PAGES_PER_SLOT + 1) | |
1073 | entry->ce_resused = NFSD_PAGES_PER_SLOT + 1; | |
1074 | nfsd4_copy_pages(entry->ce_respages, rqstp->rq_respages, | |
1075 | entry->ce_resused); | |
074fe897 AA |
1076 | entry->ce_datav.iov_base = resp->cstate.statp; |
1077 | entry->ce_datav.iov_len = resv->iov_len - ((char *)resp->cstate.statp - | |
1078 | (char *)page_address(rqstp->rq_respages[0])); | |
074fe897 AA |
1079 | /* Current request rpc header length*/ |
1080 | entry->ce_rpchdrlen = (char *)resp->cstate.statp - | |
1081 | (char *)page_address(rqstp->rq_respages[0]); | |
1082 | } | |
1083 | ||
1084 | /* | |
1085 | * We keep the rpc header, but take the nfs reply from the replycache. | |
1086 | */ | |
1087 | static int | |
1088 | nfsd41_copy_replay_data(struct nfsd4_compoundres *resp, | |
1089 | struct nfsd4_cache_entry *entry) | |
1090 | { | |
1091 | struct svc_rqst *rqstp = resp->rqstp; | |
1092 | struct kvec *resv = &resp->rqstp->rq_res.head[0]; | |
1093 | int len; | |
1094 | ||
1095 | /* Current request rpc header length*/ | |
1096 | len = (char *)resp->cstate.statp - | |
1097 | (char *)page_address(rqstp->rq_respages[0]); | |
1098 | if (entry->ce_datav.iov_len + len > PAGE_SIZE) { | |
1099 | dprintk("%s v41 cached reply too large (%Zd).\n", __func__, | |
1100 | entry->ce_datav.iov_len); | |
1101 | return 0; | |
1102 | } | |
1103 | /* copy the cached reply nfsd data past the current rpc header */ | |
1104 | memcpy((char *)resv->iov_base + len, entry->ce_datav.iov_base, | |
1105 | entry->ce_datav.iov_len); | |
1106 | resv->iov_len = len + entry->ce_datav.iov_len; | |
1107 | return 1; | |
1108 | } | |
1109 | ||
1110 | /* | |
1111 | * Keep the first page of the replay. Copy the NFSv4.1 data from the first | |
1112 | * cached page. Replace any futher replay pages from the cache. | |
1113 | */ | |
1114 | __be32 | |
bf864a31 AA |
1115 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1116 | struct nfsd4_sequence *seq) | |
074fe897 AA |
1117 | { |
1118 | struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; | |
1119 | __be32 status; | |
1120 | ||
1121 | dprintk("--> %s entry %p\n", __func__, entry); | |
1122 | ||
bf864a31 AA |
1123 | /* |
1124 | * If this is just the sequence operation, we did not keep | |
1125 | * a page in the cache entry because we can just use the | |
1126 | * slot info stored in struct nfsd4_sequence that was checked | |
1127 | * against the slot in nfsd4_sequence(). | |
1128 | * | |
1129 | * This occurs when seq->cachethis is FALSE, or when the client | |
1130 | * session inactivity timer fires and a solo sequence operation | |
1131 | * is sent (lease renewal). | |
1132 | */ | |
1133 | if (seq && nfsd4_not_cached(resp)) { | |
1134 | seq->maxslots = resp->cstate.session->se_fnumslots; | |
1135 | return nfs_ok; | |
1136 | } | |
074fe897 AA |
1137 | |
1138 | if (!nfsd41_copy_replay_data(resp, entry)) { | |
1139 | /* | |
1140 | * Not enough room to use the replay rpc header, send the | |
1141 | * cached header. Release all the allocated result pages. | |
1142 | */ | |
1143 | svc_free_res_pages(resp->rqstp); | |
1144 | nfsd4_copy_pages(resp->rqstp->rq_respages, entry->ce_respages, | |
1145 | entry->ce_resused); | |
1146 | } else { | |
1147 | /* Release all but the first allocated result page */ | |
1148 | ||
1149 | resp->rqstp->rq_resused--; | |
1150 | svc_free_res_pages(resp->rqstp); | |
1151 | ||
1152 | nfsd4_copy_pages(&resp->rqstp->rq_respages[1], | |
1153 | &entry->ce_respages[1], | |
1154 | entry->ce_resused - 1); | |
1155 | } | |
1156 | ||
1157 | resp->rqstp->rq_resused = entry->ce_resused; | |
da3846a2 AA |
1158 | resp->opcnt = entry->ce_opcnt; |
1159 | resp->cstate.iovlen = entry->ce_datav.iov_len + entry->ce_rpchdrlen; | |
074fe897 AA |
1160 | status = entry->ce_status; |
1161 | ||
1162 | return status; | |
1163 | } | |
1164 | ||
0733d213 AA |
1165 | /* |
1166 | * Set the exchange_id flags returned by the server. | |
1167 | */ | |
1168 | static void | |
1169 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1170 | { | |
1171 | /* pNFS is not supported */ | |
1172 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1173 | ||
1174 | /* Referrals are supported, Migration is not. */ | |
1175 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1176 | ||
1177 | /* set the wire flags to return to client. */ | |
1178 | clid->flags = new->cl_exchange_flags; | |
1179 | } | |
1180 | ||
069b6ad4 AA |
1181 | __be32 |
1182 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1183 | struct nfsd4_compound_state *cstate, | |
1184 | struct nfsd4_exchange_id *exid) | |
1185 | { | |
0733d213 AA |
1186 | struct nfs4_client *unconf, *conf, *new; |
1187 | int status; | |
1188 | unsigned int strhashval; | |
1189 | char dname[HEXDIR_LEN]; | |
1190 | nfs4_verifier verf = exid->verifier; | |
1191 | u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr; | |
1192 | ||
1193 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " | |
1194 | " ip_addr=%u flags %x, spa_how %d\n", | |
1195 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, | |
1196 | ip_addr, exid->flags, exid->spa_how); | |
1197 | ||
1198 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1199 | return nfserr_inval; | |
1200 | ||
1201 | /* Currently only support SP4_NONE */ | |
1202 | switch (exid->spa_how) { | |
1203 | case SP4_NONE: | |
1204 | break; | |
1205 | case SP4_SSV: | |
1206 | return nfserr_encr_alg_unsupp; | |
1207 | default: | |
1208 | BUG(); /* checked by xdr code */ | |
1209 | case SP4_MACH_CRED: | |
1210 | return nfserr_serverfault; /* no excuse :-/ */ | |
1211 | } | |
1212 | ||
1213 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1214 | ||
1215 | if (status) | |
1216 | goto error; | |
1217 | ||
1218 | strhashval = clientstr_hashval(dname); | |
1219 | ||
1220 | nfs4_lock_state(); | |
1221 | status = nfs_ok; | |
1222 | ||
a1bcecd2 | 1223 | conf = find_confirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1224 | if (conf) { |
1225 | if (!same_verf(&verf, &conf->cl_verifier)) { | |
1226 | /* 18.35.4 case 8 */ | |
1227 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1228 | status = nfserr_not_same; | |
1229 | goto out; | |
1230 | } | |
1231 | /* Client reboot: destroy old state */ | |
1232 | expire_client(conf); | |
1233 | goto out_new; | |
1234 | } | |
1235 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1236 | /* 18.35.4 case 9 */ | |
1237 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1238 | status = nfserr_perm; | |
1239 | goto out; | |
1240 | } | |
1241 | expire_client(conf); | |
1242 | goto out_new; | |
1243 | } | |
1244 | if (ip_addr != conf->cl_addr && | |
1245 | !(exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A)) { | |
1246 | /* Client collision. 18.35.4 case 3 */ | |
1247 | status = nfserr_clid_inuse; | |
1248 | goto out; | |
1249 | } | |
1250 | /* | |
1251 | * Set bit when the owner id and verifier map to an already | |
1252 | * confirmed client id (18.35.3). | |
1253 | */ | |
1254 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1255 | ||
1256 | /* | |
1257 | * Falling into 18.35.4 case 2, possible router replay. | |
1258 | * Leave confirmed record intact and return same result. | |
1259 | */ | |
1260 | copy_verf(conf, &verf); | |
1261 | new = conf; | |
1262 | goto out_copy; | |
1263 | } else { | |
1264 | /* 18.35.4 case 7 */ | |
1265 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1266 | status = nfserr_noent; | |
1267 | goto out; | |
1268 | } | |
1269 | } | |
1270 | ||
a1bcecd2 | 1271 | unconf = find_unconfirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1272 | if (unconf) { |
1273 | /* | |
1274 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1275 | * a new unconfirmed record should be generated regardless | |
1276 | * of whether any properties have changed. | |
1277 | */ | |
1278 | expire_client(unconf); | |
1279 | } | |
1280 | ||
1281 | out_new: | |
1282 | /* Normal case */ | |
1283 | new = create_client(exid->clname, dname); | |
1284 | if (new == NULL) { | |
1285 | status = nfserr_resource; | |
1286 | goto out; | |
1287 | } | |
1288 | ||
1289 | copy_verf(new, &verf); | |
1290 | copy_cred(&new->cl_cred, &rqstp->rq_cred); | |
1291 | new->cl_addr = ip_addr; | |
1292 | gen_clid(new); | |
1293 | gen_confirm(new); | |
1294 | add_to_unconfirmed(new, strhashval); | |
1295 | out_copy: | |
1296 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1297 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1298 | ||
38eb76a5 AA |
1299 | new->cl_slot.sl_seqid = 0; |
1300 | exid->seqid = 1; | |
0733d213 AA |
1301 | nfsd4_set_ex_flags(new, exid); |
1302 | ||
1303 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
38eb76a5 | 1304 | new->cl_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1305 | status = nfs_ok; |
1306 | ||
1307 | out: | |
1308 | nfs4_unlock_state(); | |
1309 | error: | |
1310 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1311 | return status; | |
069b6ad4 AA |
1312 | } |
1313 | ||
b85d4c01 BH |
1314 | static int |
1315 | check_slot_seqid(u32 seqid, struct nfsd4_slot *slot) | |
1316 | { | |
1317 | dprintk("%s enter. seqid %d slot->sl_seqid %d\n", __func__, seqid, | |
1318 | slot->sl_seqid); | |
1319 | ||
1320 | /* The slot is in use, and no response has been sent. */ | |
1321 | if (slot->sl_inuse) { | |
1322 | if (seqid == slot->sl_seqid) | |
1323 | return nfserr_jukebox; | |
1324 | else | |
1325 | return nfserr_seq_misordered; | |
1326 | } | |
1327 | /* Normal */ | |
1328 | if (likely(seqid == slot->sl_seqid + 1)) | |
1329 | return nfs_ok; | |
1330 | /* Replay */ | |
1331 | if (seqid == slot->sl_seqid) | |
1332 | return nfserr_replay_cache; | |
1333 | /* Wraparound */ | |
1334 | if (seqid == 1 && (slot->sl_seqid + 1) == 0) | |
1335 | return nfs_ok; | |
1336 | /* Misordered replay or misordered new request */ | |
1337 | return nfserr_seq_misordered; | |
1338 | } | |
1339 | ||
069b6ad4 AA |
1340 | __be32 |
1341 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1342 | struct nfsd4_compound_state *cstate, | |
1343 | struct nfsd4_create_session *cr_ses) | |
1344 | { | |
ec6b5d7b | 1345 | u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr; |
38eb76a5 | 1346 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
ec6b5d7b | 1347 | struct nfs4_client *conf, *unconf; |
38eb76a5 | 1348 | struct nfsd4_slot *slot = NULL; |
ec6b5d7b AA |
1349 | int status = 0; |
1350 | ||
1351 | nfs4_lock_state(); | |
1352 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1353 | conf = find_confirmed_client(&cr_ses->clientid); | |
1354 | ||
1355 | if (conf) { | |
38eb76a5 AA |
1356 | slot = &conf->cl_slot; |
1357 | status = check_slot_seqid(cr_ses->seqid, slot); | |
1358 | if (status == nfserr_replay_cache) { | |
ec6b5d7b | 1359 | dprintk("Got a create_session replay! seqid= %d\n", |
38eb76a5 AA |
1360 | slot->sl_seqid); |
1361 | cstate->slot = slot; | |
1362 | cstate->status = status; | |
1363 | /* Return the cached reply status */ | |
bf864a31 | 1364 | status = nfsd4_replay_cache_entry(resp, NULL); |
38eb76a5 AA |
1365 | goto out; |
1366 | } else if (cr_ses->seqid != conf->cl_slot.sl_seqid + 1) { | |
ec6b5d7b AA |
1367 | status = nfserr_seq_misordered; |
1368 | dprintk("Sequence misordered!\n"); | |
1369 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
38eb76a5 | 1370 | slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1371 | goto out; |
1372 | } | |
38eb76a5 | 1373 | conf->cl_slot.sl_seqid++; |
ec6b5d7b AA |
1374 | } else if (unconf) { |
1375 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
1376 | (ip_addr != unconf->cl_addr)) { | |
1377 | status = nfserr_clid_inuse; | |
1378 | goto out; | |
1379 | } | |
1380 | ||
38eb76a5 AA |
1381 | slot = &unconf->cl_slot; |
1382 | status = check_slot_seqid(cr_ses->seqid, slot); | |
1383 | if (status) { | |
1384 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b AA |
1385 | status = nfserr_seq_misordered; |
1386 | goto out; | |
1387 | } | |
1388 | ||
38eb76a5 | 1389 | slot->sl_seqid++; /* from 0 to 1 */ |
ec6b5d7b AA |
1390 | move_to_confirmed(unconf); |
1391 | ||
1392 | /* | |
1393 | * We do not support RDMA or persistent sessions | |
1394 | */ | |
1395 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1396 | cr_ses->flags &= ~SESSION4_RDMA; | |
1397 | ||
1398 | conf = unconf; | |
1399 | } else { | |
1400 | status = nfserr_stale_clientid; | |
1401 | goto out; | |
1402 | } | |
1403 | ||
1404 | status = alloc_init_session(rqstp, conf, cr_ses); | |
1405 | if (status) | |
1406 | goto out; | |
1407 | ||
ec6b5d7b AA |
1408 | memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, |
1409 | NFS4_MAX_SESSIONID_LEN); | |
38eb76a5 | 1410 | cr_ses->seqid = slot->sl_seqid; |
ec6b5d7b | 1411 | |
38eb76a5 AA |
1412 | slot->sl_inuse = true; |
1413 | cstate->slot = slot; | |
bf864a31 AA |
1414 | /* Ensure a page is used for the cache */ |
1415 | slot->sl_cache_entry.ce_cachethis = 1; | |
ec6b5d7b AA |
1416 | out: |
1417 | nfs4_unlock_state(); | |
1418 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1419 | return status; | |
069b6ad4 AA |
1420 | } |
1421 | ||
1422 | __be32 | |
1423 | nfsd4_destroy_session(struct svc_rqst *r, | |
1424 | struct nfsd4_compound_state *cstate, | |
1425 | struct nfsd4_destroy_session *sessionid) | |
1426 | { | |
e10e0cfc BH |
1427 | struct nfsd4_session *ses; |
1428 | u32 status = nfserr_badsession; | |
1429 | ||
1430 | /* Notes: | |
1431 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1432 | * - Should we return nfserr_back_chan_busy if waiting for | |
1433 | * callbacks on to-be-destroyed session? | |
1434 | * - Do we need to clear any callback info from previous session? | |
1435 | */ | |
1436 | ||
1437 | dump_sessionid(__func__, &sessionid->sessionid); | |
1438 | spin_lock(&sessionid_lock); | |
1439 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); | |
1440 | if (!ses) { | |
1441 | spin_unlock(&sessionid_lock); | |
1442 | goto out; | |
1443 | } | |
1444 | ||
1445 | unhash_session(ses); | |
1446 | spin_unlock(&sessionid_lock); | |
1447 | ||
1448 | /* wait for callbacks */ | |
1449 | shutdown_callback_client(ses->se_client); | |
1450 | nfsd4_put_session(ses); | |
1451 | status = nfs_ok; | |
1452 | out: | |
1453 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1454 | return status; | |
069b6ad4 AA |
1455 | } |
1456 | ||
1457 | __be32 | |
b85d4c01 | 1458 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1459 | struct nfsd4_compound_state *cstate, |
1460 | struct nfsd4_sequence *seq) | |
1461 | { | |
f9bb94c4 | 1462 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1463 | struct nfsd4_session *session; |
1464 | struct nfsd4_slot *slot; | |
1465 | int status; | |
1466 | ||
f9bb94c4 AA |
1467 | if (resp->opcnt != 1) |
1468 | return nfserr_sequence_pos; | |
1469 | ||
b85d4c01 BH |
1470 | spin_lock(&sessionid_lock); |
1471 | status = nfserr_badsession; | |
1472 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1473 | if (!session) | |
1474 | goto out; | |
1475 | ||
1476 | status = nfserr_badslot; | |
1477 | if (seq->slotid >= session->se_fnumslots) | |
1478 | goto out; | |
1479 | ||
1480 | slot = &session->se_slots[seq->slotid]; | |
1481 | dprintk("%s: slotid %d\n", __func__, seq->slotid); | |
1482 | ||
1483 | status = check_slot_seqid(seq->seqid, slot); | |
1484 | if (status == nfserr_replay_cache) { | |
1485 | cstate->slot = slot; | |
1486 | cstate->session = session; | |
da3846a2 | 1487 | /* Return the cached reply status and set cstate->status |
bf864a31 AA |
1488 | * for nfsd4_svc_encode_compoundres processing */ |
1489 | status = nfsd4_replay_cache_entry(resp, seq); | |
da3846a2 | 1490 | cstate->status = nfserr_replay_cache; |
b85d4c01 BH |
1491 | goto replay_cache; |
1492 | } | |
1493 | if (status) | |
1494 | goto out; | |
1495 | ||
1496 | /* Success! bump slot seqid */ | |
1497 | slot->sl_inuse = true; | |
1498 | slot->sl_seqid = seq->seqid; | |
bf864a31 AA |
1499 | slot->sl_cache_entry.ce_cachethis = seq->cachethis; |
1500 | /* Always set the cache entry cachethis for solo sequence */ | |
1501 | if (nfsd4_is_solo_sequence(resp)) | |
1502 | slot->sl_cache_entry.ce_cachethis = 1; | |
b85d4c01 BH |
1503 | |
1504 | cstate->slot = slot; | |
1505 | cstate->session = session; | |
1506 | ||
1507 | replay_cache: | |
1508 | /* Renew the clientid on success and on replay. | |
1509 | * Hold a session reference until done processing the compound: | |
1510 | * nfsd4_put_session called only if the cstate slot is set. | |
1511 | */ | |
1512 | renew_client(session->se_client); | |
1513 | nfsd4_get_session(session); | |
1514 | out: | |
1515 | spin_unlock(&sessionid_lock); | |
1516 | dprintk("%s: return %d\n", __func__, ntohl(status)); | |
1517 | return status; | |
069b6ad4 AA |
1518 | } |
1519 | ||
b37ad28b | 1520 | __be32 |
b591480b BF |
1521 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1522 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1523 | { |
27459f09 | 1524 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
1da177e4 LT |
1525 | struct xdr_netobj clname = { |
1526 | .len = setclid->se_namelen, | |
1527 | .data = setclid->se_name, | |
1528 | }; | |
1529 | nfs4_verifier clverifier = setclid->se_verf; | |
1530 | unsigned int strhashval; | |
28ce6054 | 1531 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1532 | __be32 status; |
68e76ad0 | 1533 | char *princ; |
a55370a3 | 1534 | char dname[HEXDIR_LEN]; |
1da177e4 | 1535 | |
1da177e4 | 1536 | if (!check_name(clname)) |
73aea4ec | 1537 | return nfserr_inval; |
1da177e4 | 1538 | |
a55370a3 N |
1539 | status = nfs4_make_rec_clidname(dname, &clname); |
1540 | if (status) | |
73aea4ec | 1541 | return status; |
a55370a3 | 1542 | |
1da177e4 LT |
1543 | /* |
1544 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1545 | * We get here on a DRC miss. | |
1546 | */ | |
1547 | ||
a55370a3 | 1548 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1549 | |
1da177e4 | 1550 | nfs4_lock_state(); |
a1bcecd2 | 1551 | conf = find_confirmed_client_by_str(dname, strhashval, false); |
28ce6054 | 1552 | if (conf) { |
a186e767 | 1553 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1554 | status = nfserr_clid_inuse; |
026722c2 BF |
1555 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
1556 | dprintk("NFSD: setclientid: string in use by client" | |
1557 | " at %pI4\n", &conf->cl_addr); | |
1da177e4 LT |
1558 | goto out; |
1559 | } | |
1da177e4 | 1560 | } |
a186e767 BF |
1561 | /* |
1562 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1563 | * has a description of SETCLIENTID request processing consisting | |
1564 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1565 | */ | |
a1bcecd2 | 1566 | unconf = find_unconfirmed_client_by_str(dname, strhashval, false); |
1da177e4 LT |
1567 | status = nfserr_resource; |
1568 | if (!conf) { | |
a186e767 BF |
1569 | /* |
1570 | * RFC 3530 14.2.33 CASE 4: | |
1571 | * placed first, because it is the normal case | |
1da177e4 LT |
1572 | */ |
1573 | if (unconf) | |
1574 | expire_client(unconf); | |
a55370a3 N |
1575 | new = create_client(clname, dname); |
1576 | if (new == NULL) | |
1da177e4 | 1577 | goto out; |
1da177e4 | 1578 | gen_clid(new); |
599e0a22 | 1579 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1580 | /* |
a186e767 BF |
1581 | * RFC 3530 14.2.33 CASE 1: |
1582 | * probable callback update | |
1da177e4 | 1583 | */ |
31f4a6c1 N |
1584 | if (unconf) { |
1585 | /* Note this is removing unconfirmed {*x***}, | |
1586 | * which is stronger than RFC recommended {vxc**}. | |
1587 | * This has the advantage that there is at most | |
1588 | * one {*x***} in either list at any time. | |
1589 | */ | |
1590 | expire_client(unconf); | |
1da177e4 | 1591 | } |
a55370a3 N |
1592 | new = create_client(clname, dname); |
1593 | if (new == NULL) | |
1da177e4 | 1594 | goto out; |
1da177e4 | 1595 | copy_clid(new, conf); |
1da177e4 LT |
1596 | } else if (!unconf) { |
1597 | /* | |
a186e767 BF |
1598 | * RFC 3530 14.2.33 CASE 2: |
1599 | * probable client reboot; state will be removed if | |
1600 | * confirmed. | |
1da177e4 | 1601 | */ |
a55370a3 N |
1602 | new = create_client(clname, dname); |
1603 | if (new == NULL) | |
1da177e4 | 1604 | goto out; |
1da177e4 | 1605 | gen_clid(new); |
49ba8781 | 1606 | } else { |
a186e767 BF |
1607 | /* |
1608 | * RFC 3530 14.2.33 CASE 3: | |
1609 | * probable client reboot; state will be removed if | |
1610 | * confirmed. | |
1da177e4 LT |
1611 | */ |
1612 | expire_client(unconf); | |
a55370a3 N |
1613 | new = create_client(clname, dname); |
1614 | if (new == NULL) | |
1da177e4 | 1615 | goto out; |
1da177e4 | 1616 | gen_clid(new); |
1da177e4 | 1617 | } |
c175b83c BF |
1618 | copy_verf(new, &clverifier); |
1619 | new->cl_addr = sin->sin_addr.s_addr; | |
61054b14 | 1620 | new->cl_flavor = rqstp->rq_flavor; |
68e76ad0 OK |
1621 | princ = svc_gss_principal(rqstp); |
1622 | if (princ) { | |
1623 | new->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1624 | if (new->cl_principal == NULL) { | |
1625 | free_client(new); | |
1626 | goto out; | |
1627 | } | |
1628 | } | |
c175b83c BF |
1629 | copy_cred(&new->cl_cred, &rqstp->rq_cred); |
1630 | gen_confirm(new); | |
1631 | gen_callback(new, setclid); | |
1632 | add_to_unconfirmed(new, strhashval); | |
1da177e4 LT |
1633 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
1634 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
1635 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
1636 | status = nfs_ok; | |
1637 | out: | |
1638 | nfs4_unlock_state(); | |
1639 | return status; | |
1640 | } | |
1641 | ||
1642 | ||
1643 | /* | |
a186e767 BF |
1644 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
1645 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
1646 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 1647 | */ |
b37ad28b | 1648 | __be32 |
b591480b BF |
1649 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
1650 | struct nfsd4_compound_state *cstate, | |
1651 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 1652 | { |
27459f09 | 1653 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
21ab45a4 | 1654 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
1655 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
1656 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 1657 | __be32 status; |
1da177e4 LT |
1658 | |
1659 | if (STALE_CLIENTID(clid)) | |
1660 | return nfserr_stale_clientid; | |
1661 | /* | |
1662 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1663 | * We get here on a DRC miss. | |
1664 | */ | |
1665 | ||
1666 | nfs4_lock_state(); | |
21ab45a4 N |
1667 | |
1668 | conf = find_confirmed_client(clid); | |
1669 | unconf = find_unconfirmed_client(clid); | |
1670 | ||
1671 | status = nfserr_clid_inuse; | |
27459f09 | 1672 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 | 1673 | goto out; |
27459f09 | 1674 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 N |
1675 | goto out; |
1676 | ||
a186e767 BF |
1677 | /* |
1678 | * section 14.2.34 of RFC 3530 has a description of | |
1679 | * SETCLIENTID_CONFIRM request processing consisting | |
1680 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
1681 | */ | |
366e0c1d | 1682 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
1683 | /* |
1684 | * RFC 3530 14.2.34 CASE 1: | |
1685 | * callback update | |
1686 | */ | |
599e0a22 | 1687 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
1688 | status = nfserr_clid_inuse; |
1689 | else { | |
1a69c179 N |
1690 | /* XXX: We just turn off callbacks until we can handle |
1691 | * change request correctly. */ | |
c237dc03 | 1692 | atomic_set(&conf->cl_cb_conn.cb_set, 0); |
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 | 1885 | stp->st_file = fp; |
78155ed7 | 1886 | stp->st_stateid.si_boot = get_seconds(); |
1da177e4 LT |
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 | ||
1da177e4 LT |
2062 | /* |
2063 | * Spawn a thread to perform a recall on the delegation represented | |
2064 | * by the lease (file_lock) | |
2065 | * | |
2066 | * Called from break_lease() with lock_kernel() held. | |
2067 | * Note: we assume break_lease will only call this *once* for any given | |
2068 | * lease. | |
2069 | */ | |
2070 | static | |
2071 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
2072 | { | |
63e4863f | 2073 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
1da177e4 LT |
2074 | |
2075 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
2076 | if (!dp) | |
2077 | return; | |
2078 | ||
2079 | /* We're assuming the state code never drops its reference | |
2080 | * without first removing the lease. Since we're in this lease | |
2081 | * callback (and since the lease code is serialized by the kernel | |
2082 | * lock) we know the server hasn't removed the lease yet, we know | |
2083 | * it's safe to take a reference: */ | |
2084 | atomic_inc(&dp->dl_count); | |
cfdcad4d | 2085 | atomic_inc(&dp->dl_client->cl_count); |
1da177e4 LT |
2086 | |
2087 | spin_lock(&recall_lock); | |
2088 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
2089 | spin_unlock(&recall_lock); | |
2090 | ||
2091 | /* only place dl_time is set. protected by lock_kernel*/ | |
2092 | dp->dl_time = get_seconds(); | |
2093 | ||
0272e1fd BF |
2094 | /* |
2095 | * We don't want the locks code to timeout the lease for us; | |
2096 | * we'll remove it ourself if the delegation isn't returned | |
2097 | * in time. | |
2098 | */ | |
2099 | fl->fl_break_time = 0; | |
1da177e4 | 2100 | |
63e4863f BF |
2101 | dp->dl_file->fi_had_conflict = true; |
2102 | nfsd4_cb_recall(dp); | |
1da177e4 LT |
2103 | } |
2104 | ||
2105 | /* | |
2106 | * The file_lock is being reapd. | |
2107 | * | |
2108 | * Called by locks_free_lock() with lock_kernel() held. | |
2109 | */ | |
2110 | static | |
2111 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
2112 | { | |
2113 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
2114 | ||
2115 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
2116 | ||
2117 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
2118 | return; | |
2119 | dp->dl_flock = NULL; | |
2120 | } | |
2121 | ||
2122 | /* | |
2123 | * Set the delegation file_lock back pointer. | |
2124 | * | |
a9933cea | 2125 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
2126 | */ |
2127 | static | |
2128 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
2129 | { | |
2130 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
2131 | ||
2132 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
2133 | if (!dp) | |
2134 | return; | |
2135 | dp->dl_flock = new; | |
2136 | } | |
2137 | ||
2138 | /* | |
a9933cea | 2139 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
2140 | */ |
2141 | static | |
2142 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
2143 | { | |
2144 | struct nfs4_delegation *onlistd = | |
2145 | (struct nfs4_delegation *)onlist->fl_owner; | |
2146 | struct nfs4_delegation *tryd = | |
2147 | (struct nfs4_delegation *)try->fl_owner; | |
2148 | ||
2149 | if (onlist->fl_lmops != try->fl_lmops) | |
2150 | return 0; | |
2151 | ||
2152 | return onlistd->dl_client == tryd->dl_client; | |
2153 | } | |
2154 | ||
2155 | ||
2156 | static | |
2157 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2158 | { | |
2159 | if (arg & F_UNLCK) | |
2160 | return lease_modify(onlist, arg); | |
2161 | else | |
2162 | return -EAGAIN; | |
2163 | } | |
2164 | ||
fd39ca9a | 2165 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
2166 | .fl_break = nfsd_break_deleg_cb, |
2167 | .fl_release_private = nfsd_release_deleg_cb, | |
2168 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
2169 | .fl_mylease = nfsd_same_client_deleg_cb, | |
2170 | .fl_change = nfsd_change_deleg_cb, | |
2171 | }; | |
2172 | ||
2173 | ||
b37ad28b | 2174 | __be32 |
6668958f AA |
2175 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2176 | struct nfsd4_open *open) | |
1da177e4 | 2177 | { |
1da177e4 LT |
2178 | clientid_t *clientid = &open->op_clientid; |
2179 | struct nfs4_client *clp = NULL; | |
2180 | unsigned int strhashval; | |
2181 | struct nfs4_stateowner *sop = NULL; | |
2182 | ||
1da177e4 | 2183 | if (!check_name(open->op_owner)) |
0f442aa2 | 2184 | return nfserr_inval; |
1da177e4 LT |
2185 | |
2186 | if (STALE_CLIENTID(&open->op_clientid)) | |
2187 | return nfserr_stale_clientid; | |
2188 | ||
2189 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2190 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2191 | open->op_stateowner = sop; |
2192 | if (!sop) { | |
2193 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2194 | clp = find_confirmed_client(clientid); |
2195 | if (clp == NULL) | |
0f442aa2 BF |
2196 | return nfserr_expired; |
2197 | goto renew; | |
1da177e4 | 2198 | } |
6668958f AA |
2199 | /* When sessions are used, skip open sequenceid processing */ |
2200 | if (nfsd4_has_session(cstate)) | |
2201 | goto renew; | |
0f442aa2 BF |
2202 | if (!sop->so_confirmed) { |
2203 | /* Replace unconfirmed owners without checking for replay. */ | |
2204 | clp = sop->so_client; | |
f044ff83 | 2205 | release_openowner(sop); |
0f442aa2 BF |
2206 | open->op_stateowner = NULL; |
2207 | goto renew; | |
2208 | } | |
2209 | if (open->op_seqid == sop->so_seqid - 1) { | |
2210 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2211 | return nfserr_replay_me; |
0f442aa2 BF |
2212 | /* The original OPEN failed so spectacularly |
2213 | * that we don't even have replay data saved! | |
2214 | * Therefore, we have no choice but to continue | |
2215 | * processing this OPEN; presumably, we'll | |
2216 | * fail again for the same reason. | |
2217 | */ | |
2218 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2219 | goto renew; | |
2220 | } | |
2221 | if (open->op_seqid != sop->so_seqid) | |
2222 | return nfserr_bad_seqid; | |
1da177e4 | 2223 | renew: |
0f442aa2 BF |
2224 | if (open->op_stateowner == NULL) { |
2225 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2226 | if (sop == NULL) | |
2227 | return nfserr_resource; | |
2228 | open->op_stateowner = sop; | |
2229 | } | |
2230 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2231 | renew_client(sop->so_client); |
0f442aa2 | 2232 | return nfs_ok; |
1da177e4 LT |
2233 | } |
2234 | ||
b37ad28b | 2235 | static inline __be32 |
4a6e43e6 N |
2236 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2237 | { | |
2238 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2239 | return nfserr_openmode; | |
2240 | else | |
2241 | return nfs_ok; | |
2242 | } | |
2243 | ||
52f4fb43 N |
2244 | static struct nfs4_delegation * |
2245 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2246 | { | |
2247 | struct nfs4_delegation *dp; | |
2248 | ||
ea1da636 | 2249 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
2250 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
2251 | return dp; | |
2252 | } | |
2253 | return NULL; | |
2254 | } | |
2255 | ||
b37ad28b | 2256 | static __be32 |
567d9829 N |
2257 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2258 | struct nfs4_delegation **dp) | |
2259 | { | |
2260 | int flags; | |
b37ad28b | 2261 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2262 | |
2263 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2264 | if (*dp == NULL) | |
c44c5eeb | 2265 | goto out; |
567d9829 N |
2266 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
2267 | RD_STATE : WR_STATE; | |
2268 | status = nfs4_check_delegmode(*dp, flags); | |
2269 | if (status) | |
2270 | *dp = NULL; | |
c44c5eeb N |
2271 | out: |
2272 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2273 | return nfs_ok; | |
2274 | if (status) | |
2275 | return status; | |
2276 | open->op_stateowner->so_confirmed = 1; | |
2277 | return nfs_ok; | |
567d9829 N |
2278 | } |
2279 | ||
b37ad28b | 2280 | static __be32 |
1da177e4 LT |
2281 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2282 | { | |
2283 | struct nfs4_stateid *local; | |
b37ad28b | 2284 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2285 | struct nfs4_stateowner *sop = open->op_stateowner; |
2286 | ||
8beefa24 | 2287 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2288 | /* ignore lock owners */ |
2289 | if (local->st_stateowner->so_is_open_owner == 0) | |
2290 | continue; | |
2291 | /* remember if we have seen this open owner */ | |
2292 | if (local->st_stateowner == sop) | |
2293 | *stpp = local; | |
2294 | /* check for conflicting share reservations */ | |
2295 | if (!test_share(local, open)) | |
2296 | goto out; | |
2297 | } | |
2298 | status = 0; | |
2299 | out: | |
2300 | return status; | |
2301 | } | |
2302 | ||
5ac049ac N |
2303 | static inline struct nfs4_stateid * |
2304 | nfs4_alloc_stateid(void) | |
2305 | { | |
2306 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2307 | } | |
2308 | ||
b37ad28b | 2309 | static __be32 |
1da177e4 | 2310 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 2311 | struct nfs4_delegation *dp, |
1da177e4 LT |
2312 | struct svc_fh *cur_fh, int flags) |
2313 | { | |
2314 | struct nfs4_stateid *stp; | |
1da177e4 | 2315 | |
5ac049ac | 2316 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2317 | if (stp == NULL) |
2318 | return nfserr_resource; | |
2319 | ||
567d9829 N |
2320 | if (dp) { |
2321 | get_file(dp->dl_vfs_file); | |
2322 | stp->st_vfs_file = dp->dl_vfs_file; | |
2323 | } else { | |
b37ad28b | 2324 | __be32 status; |
567d9829 N |
2325 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
2326 | &stp->st_vfs_file); | |
2327 | if (status) { | |
2328 | if (status == nfserr_dropit) | |
2329 | status = nfserr_jukebox; | |
5ac049ac | 2330 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
2331 | return status; |
2332 | } | |
1da177e4 | 2333 | } |
1da177e4 LT |
2334 | *stpp = stp; |
2335 | return 0; | |
2336 | } | |
2337 | ||
b37ad28b | 2338 | static inline __be32 |
1da177e4 LT |
2339 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2340 | struct nfsd4_open *open) | |
2341 | { | |
2342 | struct iattr iattr = { | |
2343 | .ia_valid = ATTR_SIZE, | |
2344 | .ia_size = 0, | |
2345 | }; | |
2346 | if (!open->op_truncate) | |
2347 | return 0; | |
2348 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2349 | return nfserr_inval; |
1da177e4 LT |
2350 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2351 | } | |
2352 | ||
b37ad28b | 2353 | static __be32 |
1da177e4 LT |
2354 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
2355 | { | |
2356 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 2357 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 2358 | unsigned int share_access, new_writer; |
b37ad28b | 2359 | __be32 status; |
1da177e4 LT |
2360 | |
2361 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
2362 | new_writer = (~share_access) & open->op_share_access |
2363 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 2364 | |
6c26d08f | 2365 | if (new_writer) { |
b37ad28b AV |
2366 | int err = get_write_access(inode); |
2367 | if (err) | |
2368 | return nfserrno(err); | |
e518f056 BH |
2369 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
2370 | if (err) | |
2371 | return nfserrno(err); | |
2372 | file_take_write(filp); | |
6c26d08f | 2373 | } |
1da177e4 LT |
2374 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2375 | if (status) { | |
6c26d08f BF |
2376 | if (new_writer) |
2377 | put_write_access(inode); | |
1da177e4 LT |
2378 | return status; |
2379 | } | |
2380 | /* remember the open */ | |
6c26d08f | 2381 | filp->f_mode |= open->op_share_access; |
b55e0ba1 BF |
2382 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
2383 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1da177e4 LT |
2384 | |
2385 | return nfs_ok; | |
2386 | } | |
2387 | ||
2388 | ||
1da177e4 | 2389 | static void |
37515177 | 2390 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2391 | { |
37515177 N |
2392 | open->op_stateowner->so_confirmed = 1; |
2393 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2394 | } |
2395 | ||
2396 | /* | |
2397 | * Attempt to hand out a delegation. | |
2398 | */ | |
2399 | static void | |
2400 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2401 | { | |
2402 | struct nfs4_delegation *dp; | |
2403 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
c237dc03 | 2404 | struct nfs4_cb_conn *cb = &sop->so_client->cl_cb_conn; |
1da177e4 LT |
2405 | struct file_lock fl, *flp = &fl; |
2406 | int status, flag = 0; | |
2407 | ||
2408 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
2409 | open->op_recall = 0; |
2410 | switch (open->op_claim_type) { | |
2411 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2412 | if (!atomic_read(&cb->cb_set)) | |
2413 | open->op_recall = 1; | |
2414 | flag = open->op_delegate_type; | |
2415 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2416 | goto out; | |
2417 | break; | |
2418 | case NFS4_OPEN_CLAIM_NULL: | |
2419 | /* Let's not give out any delegations till everyone's | |
2420 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2421 | if (locks_in_grace()) |
7b190fec N |
2422 | goto out; |
2423 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
2424 | goto out; | |
2425 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2426 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2427 | else | |
2428 | flag = NFS4_OPEN_DELEGATE_READ; | |
2429 | break; | |
2430 | default: | |
2431 | goto out; | |
2432 | } | |
1da177e4 LT |
2433 | |
2434 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
2435 | if (dp == NULL) { | |
2436 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2437 | goto out; | |
2438 | } | |
2439 | locks_init_lock(&fl); | |
2440 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
2441 | fl.fl_flags = FL_LEASE; | |
9167f501 | 2442 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
2443 | fl.fl_end = OFFSET_MAX; |
2444 | fl.fl_owner = (fl_owner_t)dp; | |
2445 | fl.fl_file = stp->st_vfs_file; | |
2446 | fl.fl_pid = current->tgid; | |
2447 | ||
a9933cea | 2448 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
2449 | * the lock_manager callbacks fl_mylease and fl_change are used |
2450 | */ | |
9167f501 | 2451 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 2452 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 2453 | unhash_delegation(dp); |
1da177e4 LT |
2454 | flag = NFS4_OPEN_DELEGATE_NONE; |
2455 | goto out; | |
2456 | } | |
2457 | ||
2458 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2459 | ||
2460 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | |
2461 | dp->dl_stateid.si_boot, | |
2462 | dp->dl_stateid.si_stateownerid, | |
2463 | dp->dl_stateid.si_fileid, | |
2464 | dp->dl_stateid.si_generation); | |
2465 | out: | |
7b190fec N |
2466 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2467 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2468 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2469 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
2470 | open->op_delegate_type = flag; |
2471 | } | |
2472 | ||
2473 | /* | |
2474 | * called with nfs4_lock_state() held. | |
2475 | */ | |
b37ad28b | 2476 | __be32 |
1da177e4 LT |
2477 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2478 | { | |
6668958f | 2479 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2480 | struct nfs4_file *fp = NULL; |
2481 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2482 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2483 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2484 | __be32 status; |
1da177e4 LT |
2485 | |
2486 | status = nfserr_inval; | |
d87a8ade | 2487 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2488 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2489 | goto out; |
2490 | /* | |
2491 | * Lookup file; if found, lookup stateid and check open request, | |
2492 | * and check for delegations in the process of being recalled. | |
2493 | * If not found, create the nfs4_file struct | |
2494 | */ | |
2495 | fp = find_file(ino); | |
2496 | if (fp) { | |
2497 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2498 | goto out; | |
c44c5eeb N |
2499 | status = nfs4_check_deleg(fp, open, &dp); |
2500 | if (status) | |
2501 | goto out; | |
1da177e4 | 2502 | } else { |
c44c5eeb N |
2503 | status = nfserr_bad_stateid; |
2504 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2505 | goto out; | |
1da177e4 LT |
2506 | status = nfserr_resource; |
2507 | fp = alloc_init_file(ino); | |
2508 | if (fp == NULL) | |
2509 | goto out; | |
2510 | } | |
2511 | ||
2512 | /* | |
2513 | * OPEN the file, or upgrade an existing OPEN. | |
2514 | * If truncate fails, the OPEN fails. | |
2515 | */ | |
2516 | if (stp) { | |
2517 | /* Stateid was found, this is an OPEN upgrade */ | |
2518 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
2519 | if (status) | |
2520 | goto out; | |
444c2c07 | 2521 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
2522 | } else { |
2523 | /* Stateid was not found, this is a new OPEN */ | |
2524 | int flags = 0; | |
9ecb6a08 | 2525 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 2526 | flags |= NFSD_MAY_READ; |
1da177e4 | 2527 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 2528 | flags |= NFSD_MAY_WRITE; |
567d9829 N |
2529 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
2530 | if (status) | |
1da177e4 LT |
2531 | goto out; |
2532 | init_stateid(stp, fp, open); | |
2533 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2534 | if (status) { | |
2283963f | 2535 | release_open_stateid(stp); |
1da177e4 LT |
2536 | goto out; |
2537 | } | |
6668958f AA |
2538 | if (nfsd4_has_session(&resp->cstate)) |
2539 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2540 | } |
2541 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2542 | ||
6668958f AA |
2543 | if (nfsd4_has_session(&resp->cstate)) |
2544 | open->op_stateowner->so_confirmed = 1; | |
2545 | ||
1da177e4 LT |
2546 | /* |
2547 | * Attempt to hand out a delegation. No error return, because the | |
2548 | * OPEN succeeds even if we fail. | |
2549 | */ | |
2550 | nfs4_open_delegation(current_fh, open, stp); | |
2551 | ||
2552 | status = nfs_ok; | |
2553 | ||
2554 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | |
2555 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | |
2556 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | |
2557 | out: | |
13cd2184 N |
2558 | if (fp) |
2559 | put_nfs4_file(fp); | |
37515177 N |
2560 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2561 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2562 | /* |
2563 | * To finish the open response, we just need to set the rflags. | |
2564 | */ | |
2565 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2566 | if (!open->op_stateowner->so_confirmed && |
2567 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2568 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2569 | ||
2570 | return status; | |
2571 | } | |
2572 | ||
b37ad28b | 2573 | __be32 |
b591480b BF |
2574 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2575 | clientid_t *clid) | |
1da177e4 LT |
2576 | { |
2577 | struct nfs4_client *clp; | |
b37ad28b | 2578 | __be32 status; |
1da177e4 LT |
2579 | |
2580 | nfs4_lock_state(); | |
2581 | dprintk("process_renew(%08x/%08x): starting\n", | |
2582 | clid->cl_boot, clid->cl_id); | |
2583 | status = nfserr_stale_clientid; | |
2584 | if (STALE_CLIENTID(clid)) | |
2585 | goto out; | |
2586 | clp = find_confirmed_client(clid); | |
2587 | status = nfserr_expired; | |
2588 | if (clp == NULL) { | |
2589 | /* We assume the client took too long to RENEW. */ | |
2590 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2591 | goto out; | |
2592 | } | |
2593 | renew_client(clp); | |
2594 | status = nfserr_cb_path_down; | |
ea1da636 | 2595 | if (!list_empty(&clp->cl_delegations) |
c237dc03 | 2596 | && !atomic_read(&clp->cl_cb_conn.cb_set)) |
1da177e4 LT |
2597 | goto out; |
2598 | status = nfs_ok; | |
2599 | out: | |
2600 | nfs4_unlock_state(); | |
2601 | return status; | |
2602 | } | |
2603 | ||
af558e33 BF |
2604 | struct lock_manager nfsd4_manager = { |
2605 | }; | |
2606 | ||
a76b4319 | 2607 | static void |
af558e33 | 2608 | nfsd4_end_grace(void) |
a76b4319 N |
2609 | { |
2610 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2611 | nfsd4_recdir_purge_old(); |
af558e33 | 2612 | locks_end_grace(&nfsd4_manager); |
a76b4319 N |
2613 | } |
2614 | ||
fd39ca9a | 2615 | static time_t |
1da177e4 LT |
2616 | nfs4_laundromat(void) |
2617 | { | |
2618 | struct nfs4_client *clp; | |
2619 | struct nfs4_stateowner *sop; | |
2620 | struct nfs4_delegation *dp; | |
2621 | struct list_head *pos, *next, reaplist; | |
2622 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
2623 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
2624 | time_t u, test_val = NFSD_LEASE_TIME; | |
2625 | ||
2626 | nfs4_lock_state(); | |
2627 | ||
2628 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2629 | if (locks_in_grace()) |
2630 | nfsd4_end_grace(); | |
1da177e4 LT |
2631 | list_for_each_safe(pos, next, &client_lru) { |
2632 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2633 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2634 | t = clp->cl_time - cutoff; | |
2635 | if (clientid_val > t) | |
2636 | clientid_val = t; | |
2637 | break; | |
2638 | } | |
2639 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
2640 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2641 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2642 | expire_client(clp); |
2643 | } | |
2644 | INIT_LIST_HEAD(&reaplist); | |
2645 | spin_lock(&recall_lock); | |
2646 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2647 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2648 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
2649 | u = dp->dl_time - cutoff; | |
2650 | if (test_val > u) | |
2651 | test_val = u; | |
2652 | break; | |
2653 | } | |
2654 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
2655 | dp, dp->dl_flock); | |
2656 | list_move(&dp->dl_recall_lru, &reaplist); | |
2657 | } | |
2658 | spin_unlock(&recall_lock); | |
2659 | list_for_each_safe(pos, next, &reaplist) { | |
2660 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2661 | list_del_init(&dp->dl_recall_lru); | |
2662 | unhash_delegation(dp); | |
2663 | } | |
2664 | test_val = NFSD_LEASE_TIME; | |
2665 | list_for_each_safe(pos, next, &close_lru) { | |
2666 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
2667 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
2668 | u = sop->so_time - cutoff; | |
2669 | if (test_val > u) | |
2670 | test_val = u; | |
2671 | break; | |
2672 | } | |
2673 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
2674 | sop->so_id); | |
f044ff83 | 2675 | release_openowner(sop); |
1da177e4 LT |
2676 | } |
2677 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
2678 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
2679 | nfs4_unlock_state(); | |
2680 | return clientid_val; | |
2681 | } | |
2682 | ||
a254b246 HH |
2683 | static struct workqueue_struct *laundry_wq; |
2684 | static void laundromat_main(struct work_struct *); | |
2685 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
2686 | ||
2687 | static void | |
c4028958 | 2688 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
2689 | { |
2690 | time_t t; | |
2691 | ||
2692 | t = nfs4_laundromat(); | |
2693 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 2694 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
2695 | } |
2696 | ||
fd39ca9a | 2697 | static struct nfs4_stateowner * |
f8816512 N |
2698 | search_close_lru(u32 st_id, int flags) |
2699 | { | |
1da177e4 LT |
2700 | struct nfs4_stateowner *local = NULL; |
2701 | ||
1da177e4 LT |
2702 | if (flags & CLOSE_STATE) { |
2703 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
2704 | if (local->so_id == st_id) | |
2705 | return local; | |
2706 | } | |
2707 | } | |
2708 | return NULL; | |
2709 | } | |
2710 | ||
2711 | static inline int | |
2712 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
2713 | { | |
7eaa36e2 | 2714 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
2715 | } |
2716 | ||
2717 | static int | |
2718 | STALE_STATEID(stateid_t *stateid) | |
2719 | { | |
78155ed7 BN |
2720 | if (time_after((unsigned long)boot_time, |
2721 | (unsigned long)stateid->si_boot)) { | |
2722 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", | |
2723 | stateid->si_boot, stateid->si_stateownerid, | |
2724 | stateid->si_fileid, stateid->si_generation); | |
2725 | return 1; | |
2726 | } | |
2727 | return 0; | |
2728 | } | |
2729 | ||
2730 | static int | |
2731 | EXPIRED_STATEID(stateid_t *stateid) | |
2732 | { | |
2733 | if (time_before((unsigned long)boot_time, | |
2734 | ((unsigned long)stateid->si_boot)) && | |
b8fd47ae | 2735 | time_before((unsigned long)(stateid->si_boot + lease_time), get_seconds())) { |
78155ed7 BN |
2736 | dprintk("NFSD: expired stateid (%08x/%08x/%08x/%08x)!\n", |
2737 | stateid->si_boot, stateid->si_stateownerid, | |
2738 | stateid->si_fileid, stateid->si_generation); | |
2739 | return 1; | |
2740 | } | |
2741 | return 0; | |
2742 | } | |
2743 | ||
2744 | static __be32 | |
2745 | stateid_error_map(stateid_t *stateid) | |
2746 | { | |
2747 | if (STALE_STATEID(stateid)) | |
2748 | return nfserr_stale_stateid; | |
2749 | if (EXPIRED_STATEID(stateid)) | |
2750 | return nfserr_expired; | |
2751 | ||
2752 | dprintk("NFSD: bad stateid (%08x/%08x/%08x/%08x)!\n", | |
2753 | stateid->si_boot, stateid->si_stateownerid, | |
2754 | stateid->si_fileid, stateid->si_generation); | |
2755 | return nfserr_bad_stateid; | |
1da177e4 LT |
2756 | } |
2757 | ||
2758 | static inline int | |
2759 | access_permit_read(unsigned long access_bmap) | |
2760 | { | |
2761 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
2762 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
2763 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
2764 | } | |
2765 | ||
2766 | static inline int | |
2767 | access_permit_write(unsigned long access_bmap) | |
2768 | { | |
2769 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
2770 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
2771 | } | |
2772 | ||
2773 | static | |
b37ad28b | 2774 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2775 | { |
b37ad28b | 2776 | __be32 status = nfserr_openmode; |
1da177e4 LT |
2777 | |
2778 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
2779 | goto out; | |
2780 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2781 | goto out; | |
2782 | status = nfs_ok; | |
2783 | out: | |
2784 | return status; | |
2785 | } | |
2786 | ||
b37ad28b | 2787 | static inline __be32 |
1da177e4 LT |
2788 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2789 | { | |
203a8c8e | 2790 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 2791 | return nfs_ok; |
af558e33 | 2792 | else if (locks_in_grace()) { |
1da177e4 LT |
2793 | /* Answer in remaining cases depends on existance of |
2794 | * conflicting state; so we must wait out the grace period. */ | |
2795 | return nfserr_grace; | |
2796 | } else if (flags & WR_STATE) | |
2797 | return nfs4_share_conflict(current_fh, | |
2798 | NFS4_SHARE_DENY_WRITE); | |
2799 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2800 | return nfs4_share_conflict(current_fh, | |
2801 | NFS4_SHARE_DENY_READ); | |
2802 | } | |
2803 | ||
2804 | /* | |
2805 | * Allow READ/WRITE during grace period on recovered state only for files | |
2806 | * that are not able to provide mandatory locking. | |
2807 | */ | |
2808 | static inline int | |
18f82731 | 2809 | grace_disallows_io(struct inode *inode) |
1da177e4 | 2810 | { |
203a8c8e | 2811 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
2812 | } |
2813 | ||
6668958f | 2814 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 2815 | { |
6668958f AA |
2816 | /* |
2817 | * When sessions are used the stateid generation number is ignored | |
2818 | * when it is zero. | |
2819 | */ | |
2820 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
2821 | goto out; | |
2822 | ||
0836f587 BF |
2823 | /* If the client sends us a stateid from the future, it's buggy: */ |
2824 | if (in->si_generation > ref->si_generation) | |
2825 | return nfserr_bad_stateid; | |
2826 | /* | |
2827 | * The following, however, can happen. For example, if the | |
2828 | * client sends an open and some IO at the same time, the open | |
2829 | * may bump si_generation while the IO is still in flight. | |
2830 | * Thanks to hard links and renames, the client never knows what | |
2831 | * file an open will affect. So it could avoid that situation | |
2832 | * only by serializing all opens and IO from the same open | |
2833 | * owner. To recover from the old_stateid error, the client | |
2834 | * will just have to retry the IO: | |
2835 | */ | |
2836 | if (in->si_generation < ref->si_generation) | |
2837 | return nfserr_old_stateid; | |
6668958f | 2838 | out: |
0836f587 BF |
2839 | return nfs_ok; |
2840 | } | |
2841 | ||
3e633079 BF |
2842 | static int is_delegation_stateid(stateid_t *stateid) |
2843 | { | |
2844 | return stateid->si_fileid == 0; | |
2845 | } | |
2846 | ||
1da177e4 LT |
2847 | /* |
2848 | * Checks for stateid operations | |
2849 | */ | |
b37ad28b | 2850 | __be32 |
dd453dfd BH |
2851 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
2852 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
2853 | { |
2854 | struct nfs4_stateid *stp = NULL; | |
2855 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 2856 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 2857 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 2858 | __be32 status; |
1da177e4 | 2859 | |
1da177e4 LT |
2860 | if (filpp) |
2861 | *filpp = NULL; | |
2862 | ||
18f82731 | 2863 | if (grace_disallows_io(ino)) |
1da177e4 LT |
2864 | return nfserr_grace; |
2865 | ||
6668958f AA |
2866 | if (nfsd4_has_session(cstate)) |
2867 | flags |= HAS_SESSION; | |
2868 | ||
1da177e4 LT |
2869 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
2870 | return check_special_stateids(current_fh, stateid, flags); | |
2871 | ||
1da177e4 LT |
2872 | status = nfserr_stale_stateid; |
2873 | if (STALE_STATEID(stateid)) | |
2874 | goto out; | |
2875 | ||
1da177e4 | 2876 | status = nfserr_bad_stateid; |
3e633079 | 2877 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 2878 | dp = find_delegation_stateid(ino, stateid); |
78155ed7 BN |
2879 | if (!dp) { |
2880 | status = stateid_error_map(stateid); | |
1da177e4 | 2881 | goto out; |
78155ed7 | 2882 | } |
6668958f AA |
2883 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
2884 | flags); | |
0c2a498f BF |
2885 | if (status) |
2886 | goto out; | |
dc9bf700 BF |
2887 | status = nfs4_check_delegmode(dp, flags); |
2888 | if (status) | |
2889 | goto out; | |
2890 | renew_client(dp->dl_client); | |
dc9bf700 BF |
2891 | if (filpp) |
2892 | *filpp = dp->dl_vfs_file; | |
1da177e4 | 2893 | } else { /* open or lock stateid */ |
a4455be0 | 2894 | stp = find_stateid(stateid, flags); |
78155ed7 BN |
2895 | if (!stp) { |
2896 | status = stateid_error_map(stateid); | |
1da177e4 | 2897 | goto out; |
78155ed7 | 2898 | } |
6150ef0d | 2899 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
2900 | goto out; |
2901 | if (!stp->st_stateowner->so_confirmed) | |
2902 | goto out; | |
6668958f AA |
2903 | status = check_stateid_generation(stateid, &stp->st_stateid, |
2904 | flags); | |
0c2a498f BF |
2905 | if (status) |
2906 | goto out; | |
a4455be0 BF |
2907 | status = nfs4_check_openmode(stp, flags); |
2908 | if (status) | |
1da177e4 LT |
2909 | goto out; |
2910 | renew_client(stp->st_stateowner->so_client); | |
2911 | if (filpp) | |
2912 | *filpp = stp->st_vfs_file; | |
1da177e4 LT |
2913 | } |
2914 | status = nfs_ok; | |
2915 | out: | |
2916 | return status; | |
2917 | } | |
2918 | ||
4c4cd222 N |
2919 | static inline int |
2920 | setlkflg (int type) | |
2921 | { | |
2922 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2923 | RD_STATE : WR_STATE; | |
2924 | } | |
1da177e4 LT |
2925 | |
2926 | /* | |
2927 | * Checks for sequence id mutating operations. | |
2928 | */ | |
b37ad28b | 2929 | static __be32 |
dd453dfd BH |
2930 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2931 | stateid_t *stateid, int flags, | |
2932 | struct nfs4_stateowner **sopp, | |
2933 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 2934 | { |
1da177e4 LT |
2935 | struct nfs4_stateid *stp; |
2936 | struct nfs4_stateowner *sop; | |
dd453dfd | 2937 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 2938 | __be32 status; |
1da177e4 LT |
2939 | |
2940 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | |
2941 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | |
2942 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
2943 | stateid->si_generation); | |
3a4f98bb | 2944 | |
1da177e4 LT |
2945 | *stpp = NULL; |
2946 | *sopp = NULL; | |
2947 | ||
1da177e4 | 2948 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2949 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2950 | return nfserr_bad_stateid; |
1da177e4 LT |
2951 | } |
2952 | ||
1da177e4 | 2953 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2954 | return nfserr_stale_stateid; |
6668958f AA |
2955 | |
2956 | if (nfsd4_has_session(cstate)) | |
2957 | flags |= HAS_SESSION; | |
2958 | ||
1da177e4 LT |
2959 | /* |
2960 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2961 | * the confirmed flag is incorrecly set, or the generation | |
2962 | * number is incorrect. | |
1da177e4 | 2963 | */ |
f8816512 N |
2964 | stp = find_stateid(stateid, flags); |
2965 | if (stp == NULL) { | |
2966 | /* | |
2967 | * Also, we should make sure this isn't just the result of | |
2968 | * a replayed close: | |
2969 | */ | |
2970 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2971 | if (sop == NULL) | |
78155ed7 | 2972 | return stateid_error_map(stateid); |
f8816512 N |
2973 | *sopp = sop; |
2974 | goto check_replay; | |
2975 | } | |
1da177e4 | 2976 | |
39325bd0 BF |
2977 | *stpp = stp; |
2978 | *sopp = sop = stp->st_stateowner; | |
2979 | ||
4c4cd222 | 2980 | if (lock) { |
4c4cd222 | 2981 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2982 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2983 | int lkflg = 0; |
b37ad28b | 2984 | __be32 status; |
4c4cd222 N |
2985 | |
2986 | lkflg = setlkflg(lock->lk_type); | |
2987 | ||
2988 | if (lock->lk_is_new) { | |
599e0a22 BF |
2989 | if (!sop->so_is_open_owner) |
2990 | return nfserr_bad_stateid; | |
60adfc50 AA |
2991 | if (!(flags & HAS_SESSION) && |
2992 | !same_clid(&clp->cl_clientid, lockclid)) | |
2993 | return nfserr_bad_stateid; | |
599e0a22 BF |
2994 | /* stp is the open stateid */ |
2995 | status = nfs4_check_openmode(stp, lkflg); | |
2996 | if (status) | |
2997 | return status; | |
2998 | } else { | |
2999 | /* stp is the lock stateid */ | |
3000 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
3001 | if (status) | |
3002 | return status; | |
4c4cd222 | 3003 | } |
1da177e4 LT |
3004 | } |
3005 | ||
f3362737 | 3006 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 3007 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 3008 | return nfserr_bad_stateid; |
1da177e4 LT |
3009 | } |
3010 | ||
1da177e4 LT |
3011 | /* |
3012 | * We now validate the seqid and stateid generation numbers. | |
3013 | * For the moment, we ignore the possibility of | |
3014 | * generation number wraparound. | |
3015 | */ | |
6668958f | 3016 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
3017 | goto check_replay; |
3018 | ||
3a4f98bb | 3019 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 3020 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3021 | " unconfirmed stateowner!\n"); |
3022 | return nfserr_bad_stateid; | |
1da177e4 | 3023 | } |
3a4f98bb | 3024 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3025 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3026 | " confirmed yet!\n"); |
3027 | return nfserr_bad_stateid; | |
1da177e4 | 3028 | } |
6668958f | 3029 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
3030 | if (status) |
3031 | return status; | |
52fd004e | 3032 | renew_client(sop->so_client); |
3a4f98bb | 3033 | return nfs_ok; |
1da177e4 | 3034 | |
1da177e4 | 3035 | check_replay: |
bd9aac52 | 3036 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3037 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3038 | /* indicate replay to calling function */ |
a90b061c | 3039 | return nfserr_replay_me; |
1da177e4 | 3040 | } |
2fdada03 | 3041 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3042 | sop->so_seqid, seqid); |
3043 | *sopp = NULL; | |
3044 | return nfserr_bad_seqid; | |
1da177e4 LT |
3045 | } |
3046 | ||
b37ad28b | 3047 | __be32 |
ca364317 | 3048 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3049 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3050 | { |
b37ad28b | 3051 | __be32 status; |
1da177e4 LT |
3052 | struct nfs4_stateowner *sop; |
3053 | struct nfs4_stateid *stp; | |
3054 | ||
3055 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3056 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3057 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3058 | |
ca364317 | 3059 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3060 | if (status) |
3061 | return status; | |
1da177e4 LT |
3062 | |
3063 | nfs4_lock_state(); | |
3064 | ||
dd453dfd | 3065 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3066 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3067 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3068 | &oc->oc_stateowner, &stp, NULL))) |
3069 | goto out; | |
3070 | ||
3071 | sop = oc->oc_stateowner; | |
3072 | sop->so_confirmed = 1; | |
3073 | update_stateid(&stp->st_stateid); | |
3074 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3075 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | |
3076 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | |
3077 | stp->st_stateid.si_boot, | |
3078 | stp->st_stateid.si_stateownerid, | |
3079 | stp->st_stateid.si_fileid, | |
3080 | stp->st_stateid.si_generation); | |
c7b9a459 N |
3081 | |
3082 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3083 | out: |
f2327d9a | 3084 | if (oc->oc_stateowner) { |
1da177e4 | 3085 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3086 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3087 | } |
1da177e4 LT |
3088 | nfs4_unlock_state(); |
3089 | return status; | |
3090 | } | |
3091 | ||
3092 | ||
3093 | /* | |
3094 | * unset all bits in union bitmap (bmap) that | |
3095 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
3096 | */ | |
3097 | static void | |
3098 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
3099 | { | |
3100 | int i; | |
3101 | for (i = 1; i < 4; i++) { | |
3102 | if ((i & access) != i) | |
3103 | __clear_bit(i, bmap); | |
3104 | } | |
3105 | } | |
3106 | ||
3107 | static void | |
3108 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3109 | { | |
3110 | int i; | |
3111 | for (i = 0; i < 4; i++) { | |
3112 | if ((i & deny) != i) | |
3113 | __clear_bit(i, bmap); | |
3114 | } | |
3115 | } | |
3116 | ||
b37ad28b | 3117 | __be32 |
ca364317 BF |
3118 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3119 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3120 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3121 | { |
b37ad28b | 3122 | __be32 status; |
1da177e4 LT |
3123 | struct nfs4_stateid *stp; |
3124 | unsigned int share_access; | |
3125 | ||
3126 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3127 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3128 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3129 | |
d87a8ade | 3130 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3131 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3132 | return nfserr_inval; |
3133 | ||
3134 | nfs4_lock_state(); | |
dd453dfd | 3135 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3136 | od->od_seqid, |
1da177e4 | 3137 | &od->od_stateid, |
f3362737 | 3138 | OPEN_STATE, |
1da177e4 LT |
3139 | &od->od_stateowner, &stp, NULL))) |
3140 | goto out; | |
3141 | ||
3142 | status = nfserr_inval; | |
3143 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3144 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3145 | stp->st_access_bmap, od->od_share_access); | |
3146 | goto out; | |
3147 | } | |
3148 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3149 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3150 | stp->st_deny_bmap, od->od_share_deny); | |
3151 | goto out; | |
3152 | } | |
3153 | set_access(&share_access, stp->st_access_bmap); | |
3154 | nfs4_file_downgrade(stp->st_vfs_file, | |
3155 | share_access & ~od->od_share_access); | |
3156 | ||
3157 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
3158 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
3159 | ||
3160 | update_stateid(&stp->st_stateid); | |
3161 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3162 | status = nfs_ok; | |
3163 | out: | |
f2327d9a | 3164 | if (od->od_stateowner) { |
1da177e4 | 3165 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3166 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3167 | } |
1da177e4 LT |
3168 | nfs4_unlock_state(); |
3169 | return status; | |
3170 | } | |
3171 | ||
3172 | /* | |
3173 | * nfs4_unlock_state() called after encode | |
3174 | */ | |
b37ad28b | 3175 | __be32 |
ca364317 | 3176 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3177 | struct nfsd4_close *close) |
1da177e4 | 3178 | { |
b37ad28b | 3179 | __be32 status; |
1da177e4 LT |
3180 | struct nfs4_stateid *stp; |
3181 | ||
3182 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3183 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3184 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3185 | |
3186 | nfs4_lock_state(); | |
3187 | /* check close_lru for replay */ | |
dd453dfd | 3188 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3189 | close->cl_seqid, |
1da177e4 | 3190 | &close->cl_stateid, |
f3362737 | 3191 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3192 | &close->cl_stateowner, &stp, NULL))) |
3193 | goto out; | |
1da177e4 LT |
3194 | status = nfs_ok; |
3195 | update_stateid(&stp->st_stateid); | |
3196 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3197 | ||
04ef5954 | 3198 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3199 | release_open_stateid(stp); |
04ef5954 BF |
3200 | |
3201 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3202 | * released by the laundromat service after the lease period | |
3203 | * to enable us to handle CLOSE replay | |
3204 | */ | |
3205 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3206 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3207 | out: |
f2327d9a | 3208 | if (close->cl_stateowner) { |
1da177e4 | 3209 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3210 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3211 | } |
1da177e4 LT |
3212 | nfs4_unlock_state(); |
3213 | return status; | |
3214 | } | |
3215 | ||
b37ad28b | 3216 | __be32 |
ca364317 BF |
3217 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3218 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3219 | { |
203a8c8e BF |
3220 | struct nfs4_delegation *dp; |
3221 | stateid_t *stateid = &dr->dr_stateid; | |
3222 | struct inode *inode; | |
b37ad28b | 3223 | __be32 status; |
6668958f | 3224 | int flags = 0; |
1da177e4 | 3225 | |
ca364317 | 3226 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3227 | return status; |
3228 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3229 | |
6668958f AA |
3230 | if (nfsd4_has_session(cstate)) |
3231 | flags |= HAS_SESSION; | |
1da177e4 | 3232 | nfs4_lock_state(); |
203a8c8e BF |
3233 | status = nfserr_bad_stateid; |
3234 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3235 | goto out; | |
3236 | status = nfserr_stale_stateid; | |
3237 | if (STALE_STATEID(stateid)) | |
3238 | goto out; | |
7e0f7cf5 | 3239 | status = nfserr_bad_stateid; |
203a8c8e BF |
3240 | if (!is_delegation_stateid(stateid)) |
3241 | goto out; | |
203a8c8e | 3242 | dp = find_delegation_stateid(inode, stateid); |
78155ed7 BN |
3243 | if (!dp) { |
3244 | status = stateid_error_map(stateid); | |
203a8c8e | 3245 | goto out; |
78155ed7 | 3246 | } |
6668958f | 3247 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3248 | if (status) |
3249 | goto out; | |
3250 | renew_client(dp->dl_client); | |
3251 | ||
3252 | unhash_delegation(dp); | |
1da177e4 | 3253 | out: |
203a8c8e BF |
3254 | nfs4_unlock_state(); |
3255 | ||
1da177e4 LT |
3256 | return status; |
3257 | } | |
3258 | ||
3259 | ||
3260 | /* | |
3261 | * Lock owner state (byte-range locks) | |
3262 | */ | |
3263 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3264 | #define LOCK_HASH_BITS 8 | |
3265 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3266 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3267 | ||
87df4de8 BH |
3268 | static inline u64 |
3269 | end_offset(u64 start, u64 len) | |
3270 | { | |
3271 | u64 end; | |
3272 | ||
3273 | end = start + len; | |
3274 | return end >= start ? end: NFS4_MAX_UINT64; | |
3275 | } | |
3276 | ||
3277 | /* last octet in a range */ | |
3278 | static inline u64 | |
3279 | last_byte_offset(u64 start, u64 len) | |
3280 | { | |
3281 | u64 end; | |
3282 | ||
3283 | BUG_ON(!len); | |
3284 | end = start + len; | |
3285 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3286 | } | |
3287 | ||
1da177e4 LT |
3288 | #define lockownerid_hashval(id) \ |
3289 | ((id) & LOCK_HASH_MASK) | |
3290 | ||
3291 | static inline unsigned int | |
3292 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3293 | struct xdr_netobj *ownername) | |
3294 | { | |
3295 | return (file_hashval(inode) + cl_id | |
3296 | + opaque_hashval(ownername->data, ownername->len)) | |
3297 | & LOCK_HASH_MASK; | |
3298 | } | |
3299 | ||
3300 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3301 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3302 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3303 | ||
fd39ca9a | 3304 | static struct nfs4_stateid * |
1da177e4 LT |
3305 | find_stateid(stateid_t *stid, int flags) |
3306 | { | |
9346eff0 | 3307 | struct nfs4_stateid *local; |
1da177e4 LT |
3308 | u32 st_id = stid->si_stateownerid; |
3309 | u32 f_id = stid->si_fileid; | |
3310 | unsigned int hashval; | |
3311 | ||
3312 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3313 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3314 | hashval = stateid_hashval(st_id, f_id); |
3315 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3316 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3317 | (local->st_stateid.si_fileid == f_id)) | |
3318 | return local; | |
3319 | } | |
3320 | } | |
9346eff0 KK |
3321 | |
3322 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3323 | hashval = stateid_hashval(st_id, f_id); |
3324 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3325 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3326 | (local->st_stateid.si_fileid == f_id)) | |
3327 | return local; | |
3328 | } | |
849823c5 | 3329 | } |
1da177e4 LT |
3330 | return NULL; |
3331 | } | |
3332 | ||
3333 | static struct nfs4_delegation * | |
3334 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3335 | { | |
13cd2184 N |
3336 | struct nfs4_file *fp; |
3337 | struct nfs4_delegation *dl; | |
1da177e4 LT |
3338 | |
3339 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | |
3340 | stid->si_boot, stid->si_stateownerid, | |
3341 | stid->si_fileid, stid->si_generation); | |
3342 | ||
1da177e4 | 3343 | fp = find_file(ino); |
13cd2184 N |
3344 | if (!fp) |
3345 | return NULL; | |
3346 | dl = find_delegation_file(fp, stid); | |
3347 | put_nfs4_file(fp); | |
3348 | return dl; | |
1da177e4 LT |
3349 | } |
3350 | ||
3351 | /* | |
3352 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3353 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3354 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3355 | * locking, this prevents us from being completely protocol-compliant. The | |
3356 | * real solution to this problem is to start using unsigned file offsets in | |
3357 | * the VFS, but this is a very deep change! | |
3358 | */ | |
3359 | static inline void | |
3360 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3361 | { | |
3362 | if (lock->fl_start < 0) | |
3363 | lock->fl_start = OFFSET_MAX; | |
3364 | if (lock->fl_end < 0) | |
3365 | lock->fl_end = OFFSET_MAX; | |
3366 | } | |
3367 | ||
d5b9026a N |
3368 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3369 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
e465a77f | 3370 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3371 | }; |
1da177e4 LT |
3372 | |
3373 | static inline void | |
3374 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3375 | { | |
d5b9026a N |
3376 | struct nfs4_stateowner *sop; |
3377 | unsigned int hval; | |
1da177e4 | 3378 | |
d5b9026a N |
3379 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3380 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
3381 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
3382 | kref_get(&sop->so_ref); |
3383 | deny->ld_sop = sop; | |
3384 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3385 | } else { |
3386 | deny->ld_sop = NULL; | |
3387 | deny->ld_clientid.cl_boot = 0; | |
3388 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3389 | } |
3390 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3391 | deny->ld_length = NFS4_MAX_UINT64; |
3392 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3393 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3394 | deny->ld_type = NFS4_READ_LT; | |
3395 | if (fl->fl_type != F_RDLCK) | |
3396 | deny->ld_type = NFS4_WRITE_LT; | |
3397 | } | |
3398 | ||
1da177e4 LT |
3399 | static struct nfs4_stateowner * |
3400 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3401 | struct xdr_netobj *owner) | |
3402 | { | |
3403 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3404 | struct nfs4_stateowner *op; | |
3405 | ||
3406 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3407 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3408 | return op; |
3409 | } | |
3410 | return NULL; | |
3411 | } | |
3412 | ||
3413 | /* | |
3414 | * Alloc a lock owner structure. | |
3415 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
3416 | * occured. | |
3417 | * | |
3418 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3419 | */ |
3420 | ||
3421 | static struct nfs4_stateowner * | |
3422 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3423 | struct nfs4_stateowner *sop; | |
3424 | struct nfs4_replay *rp; | |
3425 | unsigned int idhashval; | |
3426 | ||
3427 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3428 | return NULL; | |
3429 | idhashval = lockownerid_hashval(current_ownerid); | |
3430 | INIT_LIST_HEAD(&sop->so_idhash); | |
3431 | INIT_LIST_HEAD(&sop->so_strhash); | |
3432 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3433 | INIT_LIST_HEAD(&sop->so_stateids); |
3434 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3435 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3436 | sop->so_time = 0; | |
3437 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3438 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3439 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3440 | sop->so_is_open_owner = 0; |
3441 | sop->so_id = current_ownerid++; | |
3442 | sop->so_client = clp; | |
b59e3c0e NB |
3443 | /* It is the openowner seqid that will be incremented in encode in the |
3444 | * case of new lockowners; so increment the lock seqid manually: */ | |
3445 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3446 | sop->so_confirmed = 1; |
3447 | rp = &sop->so_replay; | |
de1ae286 | 3448 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3449 | rp->rp_buflen = 0; |
3450 | rp->rp_buf = rp->rp_ibuf; | |
3451 | return sop; | |
3452 | } | |
3453 | ||
fd39ca9a | 3454 | static struct nfs4_stateid * |
1da177e4 LT |
3455 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3456 | { | |
3457 | struct nfs4_stateid *stp; | |
3458 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3459 | ||
5ac049ac N |
3460 | stp = nfs4_alloc_stateid(); |
3461 | if (stp == NULL) | |
1da177e4 LT |
3462 | goto out; |
3463 | INIT_LIST_HEAD(&stp->st_hash); | |
3464 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3465 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3466 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3467 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3468 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3469 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3470 | stp->st_stateowner = sop; |
13cd2184 | 3471 | get_nfs4_file(fp); |
1da177e4 | 3472 | stp->st_file = fp; |
78155ed7 | 3473 | stp->st_stateid.si_boot = get_seconds(); |
1da177e4 LT |
3474 | stp->st_stateid.si_stateownerid = sop->so_id; |
3475 | stp->st_stateid.si_fileid = fp->fi_id; | |
3476 | stp->st_stateid.si_generation = 0; | |
3477 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
3478 | stp->st_access_bmap = open_stp->st_access_bmap; | |
3479 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 3480 | stp->st_openstp = open_stp; |
1da177e4 LT |
3481 | |
3482 | out: | |
3483 | return stp; | |
3484 | } | |
3485 | ||
fd39ca9a | 3486 | static int |
1da177e4 LT |
3487 | check_lock_length(u64 offset, u64 length) |
3488 | { | |
87df4de8 | 3489 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3490 | LOFF_OVERFLOW(offset, length))); |
3491 | } | |
3492 | ||
3493 | /* | |
3494 | * LOCK operation | |
3495 | */ | |
b37ad28b | 3496 | __be32 |
ca364317 | 3497 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3498 | struct nfsd4_lock *lock) |
1da177e4 | 3499 | { |
3e9e3dbe | 3500 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3501 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
3502 | struct nfs4_stateid *lock_stp; |
3503 | struct file *filp; | |
3504 | struct file_lock file_lock; | |
8dc7c311 | 3505 | struct file_lock conflock; |
b37ad28b | 3506 | __be32 status = 0; |
1da177e4 | 3507 | unsigned int strhashval; |
150b3934 | 3508 | unsigned int cmd; |
b8dd7b9a | 3509 | int err; |
1da177e4 LT |
3510 | |
3511 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3512 | (long long) lock->lk_offset, | |
3513 | (long long) lock->lk_length); | |
3514 | ||
1da177e4 LT |
3515 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3516 | return nfserr_inval; | |
3517 | ||
ca364317 | 3518 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3519 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3520 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3521 | return status; | |
3522 | } | |
3523 | ||
1da177e4 LT |
3524 | nfs4_lock_state(); |
3525 | ||
3526 | if (lock->lk_is_new) { | |
893f8770 N |
3527 | /* |
3528 | * Client indicates that this is a new lockowner. | |
3529 | * Use open owner and open stateid to create lock owner and | |
3530 | * lock stateid. | |
3531 | */ | |
1da177e4 LT |
3532 | struct nfs4_stateid *open_stp = NULL; |
3533 | struct nfs4_file *fp; | |
3534 | ||
3535 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3536 | if (!nfsd4_has_session(cstate) && |
3537 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3538 | goto out; |
1da177e4 | 3539 | |
1da177e4 | 3540 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3541 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3542 | lock->lk_new_open_seqid, |
3543 | &lock->lk_new_open_stateid, | |
f3362737 | 3544 | OPEN_STATE, |
3a65588a | 3545 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 3546 | lock); |
37515177 | 3547 | if (status) |
1da177e4 | 3548 | goto out; |
3a65588a | 3549 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
3550 | /* create lockowner and lock stateid */ |
3551 | fp = open_stp->st_file; | |
3552 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3553 | open_sop->so_client->cl_clientid.cl_id, | |
3554 | &lock->v.new.owner); | |
3e9e3dbe N |
3555 | /* XXX: Do we need to check for duplicate stateowners on |
3556 | * the same file, or should they just be allowed (and | |
3557 | * create new stateids)? */ | |
1da177e4 | 3558 | status = nfserr_resource; |
b59e3c0e NB |
3559 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3560 | open_sop->so_client, open_stp, lock); | |
3561 | if (lock_sop == NULL) | |
1da177e4 | 3562 | goto out; |
b59e3c0e | 3563 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3564 | if (lock_stp == NULL) |
1da177e4 | 3565 | goto out; |
1da177e4 LT |
3566 | } else { |
3567 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3568 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3569 | lock->lk_old_lock_seqid, |
3570 | &lock->lk_old_lock_stateid, | |
f3362737 | 3571 | LOCK_STATE, |
3a65588a | 3572 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
3573 | if (status) |
3574 | goto out; | |
3a65588a | 3575 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 3576 | } |
3a65588a | 3577 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
3578 | filp = lock_stp->st_vfs_file; |
3579 | ||
0dd395dc | 3580 | status = nfserr_grace; |
af558e33 | 3581 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3582 | goto out; |
3583 | status = nfserr_no_grace; | |
af558e33 | 3584 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3585 | goto out; |
3586 | ||
1da177e4 LT |
3587 | locks_init_lock(&file_lock); |
3588 | switch (lock->lk_type) { | |
3589 | case NFS4_READ_LT: | |
3590 | case NFS4_READW_LT: | |
3591 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 3592 | cmd = F_SETLK; |
1da177e4 LT |
3593 | break; |
3594 | case NFS4_WRITE_LT: | |
3595 | case NFS4_WRITEW_LT: | |
3596 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 3597 | cmd = F_SETLK; |
1da177e4 LT |
3598 | break; |
3599 | default: | |
3600 | status = nfserr_inval; | |
3601 | goto out; | |
3602 | } | |
b59e3c0e | 3603 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3604 | file_lock.fl_pid = current->tgid; |
3605 | file_lock.fl_file = filp; | |
3606 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3607 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3608 | |
3609 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3610 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3611 | nfs4_transform_lock_offset(&file_lock); |
3612 | ||
3613 | /* | |
3614 | * Try to lock the file in the VFS. | |
3615 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3616 | */ | |
3617 | ||
fd85b817 | 3618 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 3619 | switch (-err) { |
1da177e4 LT |
3620 | case 0: /* success! */ |
3621 | update_stateid(&lock_stp->st_stateid); | |
3622 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
3623 | sizeof(stateid_t)); | |
b8dd7b9a | 3624 | status = 0; |
eb76b3fd AA |
3625 | break; |
3626 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3627 | status = nfserr_denied; | |
3628 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3629 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3630 | break; | |
1da177e4 LT |
3631 | case (EDEADLK): |
3632 | status = nfserr_deadlock; | |
eb76b3fd | 3633 | break; |
1da177e4 | 3634 | default: |
fd85b817 | 3635 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
3636 | status = nfserr_resource; |
3637 | break; | |
1da177e4 | 3638 | } |
1da177e4 | 3639 | out: |
8a280510 | 3640 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3641 | release_lockowner(lock_sop); |
3a65588a BF |
3642 | if (lock->lk_replay_owner) { |
3643 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 3644 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 3645 | } |
1da177e4 LT |
3646 | nfs4_unlock_state(); |
3647 | return status; | |
3648 | } | |
3649 | ||
55ef1274 BF |
3650 | /* |
3651 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
3652 | * so we do a temporary open here just to get an open file to pass to | |
3653 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
3654 | * inode operation.) | |
3655 | */ | |
3656 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
3657 | { | |
3658 | struct file *file; | |
3659 | int err; | |
3660 | ||
3661 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
3662 | if (err) | |
3663 | return err; | |
3664 | err = vfs_test_lock(file, lock); | |
3665 | nfsd_close(file); | |
3666 | return err; | |
3667 | } | |
3668 | ||
1da177e4 LT |
3669 | /* |
3670 | * LOCKT operation | |
3671 | */ | |
b37ad28b | 3672 | __be32 |
ca364317 BF |
3673 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3674 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
3675 | { |
3676 | struct inode *inode; | |
1da177e4 | 3677 | struct file_lock file_lock; |
fd85b817 | 3678 | int error; |
b37ad28b | 3679 | __be32 status; |
1da177e4 | 3680 | |
af558e33 | 3681 | if (locks_in_grace()) |
1da177e4 LT |
3682 | return nfserr_grace; |
3683 | ||
3684 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
3685 | return nfserr_inval; | |
3686 | ||
3687 | lockt->lt_stateowner = NULL; | |
3688 | nfs4_lock_state(); | |
3689 | ||
3690 | status = nfserr_stale_clientid; | |
60adfc50 | 3691 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 3692 | goto out; |
1da177e4 | 3693 | |
ca364317 | 3694 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 3695 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
3696 | if (status == nfserr_symlink) |
3697 | status = nfserr_inval; | |
3698 | goto out; | |
3699 | } | |
3700 | ||
ca364317 | 3701 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
3702 | locks_init_lock(&file_lock); |
3703 | switch (lockt->lt_type) { | |
3704 | case NFS4_READ_LT: | |
3705 | case NFS4_READW_LT: | |
3706 | file_lock.fl_type = F_RDLCK; | |
3707 | break; | |
3708 | case NFS4_WRITE_LT: | |
3709 | case NFS4_WRITEW_LT: | |
3710 | file_lock.fl_type = F_WRLCK; | |
3711 | break; | |
3712 | default: | |
2fdada03 | 3713 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
3714 | status = nfserr_inval; |
3715 | goto out; | |
3716 | } | |
3717 | ||
3718 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
3719 | &lockt->lt_clientid, &lockt->lt_owner); | |
3720 | if (lockt->lt_stateowner) | |
3721 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
3722 | file_lock.fl_pid = current->tgid; | |
3723 | file_lock.fl_flags = FL_POSIX; | |
3724 | ||
3725 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 3726 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
3727 | |
3728 | nfs4_transform_lock_offset(&file_lock); | |
3729 | ||
1da177e4 | 3730 | status = nfs_ok; |
55ef1274 | 3731 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
3732 | if (error) { |
3733 | status = nfserrno(error); | |
3734 | goto out; | |
3735 | } | |
9d6a8c5c | 3736 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 3737 | status = nfserr_denied; |
9d6a8c5c | 3738 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
3739 | } |
3740 | out: | |
3741 | nfs4_unlock_state(); | |
3742 | return status; | |
3743 | } | |
3744 | ||
b37ad28b | 3745 | __be32 |
ca364317 | 3746 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3747 | struct nfsd4_locku *locku) |
1da177e4 LT |
3748 | { |
3749 | struct nfs4_stateid *stp; | |
3750 | struct file *filp = NULL; | |
3751 | struct file_lock file_lock; | |
b37ad28b | 3752 | __be32 status; |
b8dd7b9a | 3753 | int err; |
1da177e4 LT |
3754 | |
3755 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
3756 | (long long) locku->lu_offset, | |
3757 | (long long) locku->lu_length); | |
3758 | ||
3759 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
3760 | return nfserr_inval; | |
3761 | ||
3762 | nfs4_lock_state(); | |
3763 | ||
dd453dfd | 3764 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3765 | locku->lu_seqid, |
3766 | &locku->lu_stateid, | |
f3362737 | 3767 | LOCK_STATE, |
1da177e4 LT |
3768 | &locku->lu_stateowner, &stp, NULL))) |
3769 | goto out; | |
3770 | ||
3771 | filp = stp->st_vfs_file; | |
3772 | BUG_ON(!filp); | |
3773 | locks_init_lock(&file_lock); | |
3774 | file_lock.fl_type = F_UNLCK; | |
3775 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
3776 | file_lock.fl_pid = current->tgid; | |
3777 | file_lock.fl_file = filp; | |
3778 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3779 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3780 | file_lock.fl_start = locku->lu_offset; |
3781 | ||
87df4de8 | 3782 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
3783 | nfs4_transform_lock_offset(&file_lock); |
3784 | ||
3785 | /* | |
3786 | * Try to unlock the file in the VFS. | |
3787 | */ | |
fd85b817 | 3788 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 3789 | if (err) { |
fd85b817 | 3790 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
3791 | goto out_nfserr; |
3792 | } | |
3793 | /* | |
3794 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
3795 | */ | |
3796 | update_stateid(&stp->st_stateid); | |
3797 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3798 | ||
3799 | out: | |
f2327d9a | 3800 | if (locku->lu_stateowner) { |
1da177e4 | 3801 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 3802 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 3803 | } |
1da177e4 LT |
3804 | nfs4_unlock_state(); |
3805 | return status; | |
3806 | ||
3807 | out_nfserr: | |
b8dd7b9a | 3808 | status = nfserrno(err); |
1da177e4 LT |
3809 | goto out; |
3810 | } | |
3811 | ||
3812 | /* | |
3813 | * returns | |
3814 | * 1: locks held by lockowner | |
3815 | * 0: no locks held by lockowner | |
3816 | */ | |
3817 | static int | |
3818 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
3819 | { | |
3820 | struct file_lock **flpp; | |
7eaa36e2 | 3821 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
3822 | int status = 0; |
3823 | ||
3824 | lock_kernel(); | |
3825 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 3826 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
3827 | status = 1; |
3828 | goto out; | |
796dadfd | 3829 | } |
1da177e4 LT |
3830 | } |
3831 | out: | |
3832 | unlock_kernel(); | |
3833 | return status; | |
3834 | } | |
3835 | ||
b37ad28b | 3836 | __be32 |
b591480b BF |
3837 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
3838 | struct nfsd4_compound_state *cstate, | |
3839 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
3840 | { |
3841 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
3842 | struct nfs4_stateowner *sop; |
3843 | struct nfs4_stateid *stp; | |
1da177e4 | 3844 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3845 | struct list_head matches; |
3846 | int i; | |
b37ad28b | 3847 | __be32 status; |
1da177e4 LT |
3848 | |
3849 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3850 | clid->cl_boot, clid->cl_id); | |
3851 | ||
3852 | /* XXX check for lease expiration */ | |
3853 | ||
3854 | status = nfserr_stale_clientid; | |
849823c5 | 3855 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3856 | return status; |
1da177e4 LT |
3857 | |
3858 | nfs4_lock_state(); | |
3859 | ||
3e9e3dbe N |
3860 | status = nfserr_locks_held; |
3861 | /* XXX: we're doing a linear search through all the lockowners. | |
3862 | * Yipes! For now we'll just hope clients aren't really using | |
3863 | * release_lockowner much, but eventually we have to fix these | |
3864 | * data structures. */ | |
3865 | INIT_LIST_HEAD(&matches); | |
3866 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3867 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 3868 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3869 | continue; |
3870 | list_for_each_entry(stp, &sop->so_stateids, | |
3871 | st_perstateowner) { | |
3872 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3873 | goto out; | |
3874 | /* Note: so_perclient unused for lockowners, | |
3875 | * so it's OK to fool with here. */ | |
3876 | list_add(&sop->so_perclient, &matches); | |
3877 | } | |
1da177e4 | 3878 | } |
3e9e3dbe N |
3879 | } |
3880 | /* Clients probably won't expect us to return with some (but not all) | |
3881 | * of the lockowner state released; so don't release any until all | |
3882 | * have been checked. */ | |
3883 | status = nfs_ok; | |
0fa822e4 N |
3884 | while (!list_empty(&matches)) { |
3885 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3886 | so_perclient); | |
3887 | /* unhash_stateowner deletes so_perclient only | |
3888 | * for openowners. */ | |
3889 | list_del(&sop->so_perclient); | |
f044ff83 | 3890 | release_lockowner(sop); |
1da177e4 LT |
3891 | } |
3892 | out: | |
3893 | nfs4_unlock_state(); | |
3894 | return status; | |
3895 | } | |
3896 | ||
3897 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3898 | alloc_reclaim(void) |
1da177e4 | 3899 | { |
a55370a3 | 3900 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3901 | } |
3902 | ||
c7b9a459 | 3903 | int |
a1bcecd2 | 3904 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
3905 | { |
3906 | unsigned int strhashval = clientstr_hashval(name); | |
3907 | struct nfs4_client *clp; | |
3908 | ||
a1bcecd2 | 3909 | clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); |
c7b9a459 N |
3910 | return clp ? 1 : 0; |
3911 | } | |
3912 | ||
1da177e4 LT |
3913 | /* |
3914 | * failure => all reset bets are off, nfserr_no_grace... | |
3915 | */ | |
190e4fbf N |
3916 | int |
3917 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3918 | { |
3919 | unsigned int strhashval; | |
3920 | struct nfs4_client_reclaim *crp = NULL; | |
3921 | ||
a55370a3 N |
3922 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3923 | crp = alloc_reclaim(); | |
1da177e4 LT |
3924 | if (!crp) |
3925 | return 0; | |
a55370a3 | 3926 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3927 | INIT_LIST_HEAD(&crp->cr_strhash); |
3928 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3929 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3930 | reclaim_str_hashtbl_size++; |
3931 | return 1; | |
3932 | } | |
3933 | ||
3934 | static void | |
3935 | nfs4_release_reclaim(void) | |
3936 | { | |
3937 | struct nfs4_client_reclaim *crp = NULL; | |
3938 | int i; | |
3939 | ||
1da177e4 LT |
3940 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3941 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3942 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3943 | struct nfs4_client_reclaim, cr_strhash); | |
3944 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3945 | kfree(crp); |
3946 | reclaim_str_hashtbl_size--; | |
3947 | } | |
3948 | } | |
3949 | BUG_ON(reclaim_str_hashtbl_size); | |
3950 | } | |
3951 | ||
3952 | /* | |
3953 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3954 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3955 | nfs4_find_reclaim_client(clientid_t *clid) |
3956 | { | |
3957 | unsigned int strhashval; | |
3958 | struct nfs4_client *clp; | |
3959 | struct nfs4_client_reclaim *crp = NULL; | |
3960 | ||
3961 | ||
3962 | /* find clientid in conf_id_hashtbl */ | |
3963 | clp = find_confirmed_client(clid); | |
3964 | if (clp == NULL) | |
3965 | return NULL; | |
3966 | ||
a55370a3 N |
3967 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3968 | clp->cl_name.len, clp->cl_name.data, | |
3969 | clp->cl_recdir); | |
1da177e4 LT |
3970 | |
3971 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3972 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3973 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3974 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3975 | return crp; |
3976 | } | |
3977 | } | |
3978 | return NULL; | |
3979 | } | |
3980 | ||
3981 | /* | |
3982 | * Called from OPEN. Look for clientid in reclaim list. | |
3983 | */ | |
b37ad28b | 3984 | __be32 |
1da177e4 LT |
3985 | nfs4_check_open_reclaim(clientid_t *clid) |
3986 | { | |
dfc83565 | 3987 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3988 | } |
3989 | ||
ac4d8ff2 | 3990 | /* initialization to perform at module load time: */ |
1da177e4 | 3991 | |
e8ff2a84 | 3992 | int |
ac4d8ff2 | 3993 | nfs4_state_init(void) |
1da177e4 | 3994 | { |
e8ff2a84 | 3995 | int i, status; |
1da177e4 | 3996 | |
e8ff2a84 BF |
3997 | status = nfsd4_init_slabs(); |
3998 | if (status) | |
3999 | return status; | |
1da177e4 LT |
4000 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4001 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4002 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4003 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4004 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4005 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4006 | } |
5282fd72 ME |
4007 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4008 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4009 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4010 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4011 | } | |
4012 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
4013 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
4014 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
4015 | } | |
4016 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
4017 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
4018 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
4019 | } | |
4020 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4021 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4022 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4023 | } | |
1da177e4 | 4024 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4025 | INIT_LIST_HEAD(&close_lru); |
4026 | INIT_LIST_HEAD(&client_lru); | |
4027 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4028 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4029 | return 0; |
ac4d8ff2 N |
4030 | } |
4031 | ||
190e4fbf N |
4032 | static void |
4033 | nfsd4_load_reboot_recovery_data(void) | |
4034 | { | |
4035 | int status; | |
4036 | ||
0964a3d3 N |
4037 | nfs4_lock_state(); |
4038 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 4039 | status = nfsd4_recdir_load(); |
0964a3d3 | 4040 | nfs4_unlock_state(); |
190e4fbf N |
4041 | if (status) |
4042 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4043 | } | |
4044 | ||
9a8db97e ME |
4045 | unsigned long |
4046 | get_nfs4_grace_period(void) | |
4047 | { | |
4048 | return max(user_lease_time, lease_time) * HZ; | |
4049 | } | |
4050 | ||
c2f1a551 MS |
4051 | /* |
4052 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4053 | * client may quite reasonably hang on to a delegation as long as it has | |
4054 | * the inode cached. This becomes an obvious problem the first time a | |
4055 | * client's inode cache approaches the size of the server's total memory. | |
4056 | * | |
4057 | * For now we avoid this problem by imposing a hard limit on the number | |
4058 | * of delegations, which varies according to the server's memory size. | |
4059 | */ | |
4060 | static void | |
4061 | set_max_delegations(void) | |
4062 | { | |
4063 | /* | |
4064 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4065 | * estimates suggest that in the worst case (where every delegation | |
4066 | * is for a different inode), a delegation could take about 1.5K, | |
4067 | * giving a worst case usage of about 6% of memory. | |
4068 | */ | |
4069 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4070 | } | |
4071 | ||
ac4d8ff2 N |
4072 | /* initialization to perform when the nfsd service is started: */ |
4073 | ||
4074 | static void | |
4075 | __nfs4_state_start(void) | |
4076 | { | |
9a8db97e | 4077 | unsigned long grace_time; |
ac4d8ff2 | 4078 | |
1da177e4 | 4079 | boot_time = get_seconds(); |
af558e33 | 4080 | grace_time = get_nfs4_grace_period(); |
d99a05ad | 4081 | lease_time = user_lease_time; |
af558e33 | 4082 | locks_start_grace(&nfsd4_manager); |
9a8db97e ME |
4083 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
4084 | grace_time/HZ); | |
58da282b | 4085 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
9a8db97e | 4086 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
c2f1a551 | 4087 | set_max_delegations(); |
1da177e4 LT |
4088 | } |
4089 | ||
e8ff2a84 | 4090 | void |
76a3550e | 4091 | nfs4_state_start(void) |
1da177e4 | 4092 | { |
1da177e4 | 4093 | if (nfs4_init) |
e8ff2a84 | 4094 | return; |
190e4fbf | 4095 | nfsd4_load_reboot_recovery_data(); |
76a3550e | 4096 | __nfs4_state_start(); |
1da177e4 | 4097 | nfs4_init = 1; |
e8ff2a84 | 4098 | return; |
1da177e4 LT |
4099 | } |
4100 | ||
1da177e4 LT |
4101 | time_t |
4102 | nfs4_lease_time(void) | |
4103 | { | |
4104 | return lease_time; | |
4105 | } | |
4106 | ||
4107 | static void | |
4108 | __nfs4_state_shutdown(void) | |
4109 | { | |
4110 | int i; | |
4111 | struct nfs4_client *clp = NULL; | |
4112 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4113 | struct list_head *pos, *next, reaplist; |
4114 | ||
1da177e4 LT |
4115 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4116 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4117 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4118 | expire_client(clp); | |
4119 | } | |
4120 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4121 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4122 | expire_client(clp); | |
4123 | } | |
4124 | } | |
4125 | INIT_LIST_HEAD(&reaplist); | |
4126 | spin_lock(&recall_lock); | |
4127 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4128 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4129 | list_move(&dp->dl_recall_lru, &reaplist); | |
4130 | } | |
4131 | spin_unlock(&recall_lock); | |
4132 | list_for_each_safe(pos, next, &reaplist) { | |
4133 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4134 | list_del_init(&dp->dl_recall_lru); | |
4135 | unhash_delegation(dp); | |
4136 | } | |
4137 | ||
190e4fbf | 4138 | nfsd4_shutdown_recdir(); |
1da177e4 | 4139 | nfs4_init = 0; |
1da177e4 LT |
4140 | } |
4141 | ||
4142 | void | |
4143 | nfs4_state_shutdown(void) | |
4144 | { | |
5e8d5c29 N |
4145 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
4146 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 4147 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4148 | nfs4_lock_state(); |
4149 | nfs4_release_reclaim(); | |
4150 | __nfs4_state_shutdown(); | |
1da177e4 LT |
4151 | nfs4_unlock_state(); |
4152 | } | |
4153 | ||
3dd98a3b JL |
4154 | /* |
4155 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4156 | * accessed when nfsd is starting. | |
4157 | */ | |
0964a3d3 N |
4158 | static void |
4159 | nfs4_set_recdir(char *recdir) | |
4160 | { | |
0964a3d3 | 4161 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4162 | } |
4163 | ||
4164 | /* | |
4165 | * Change the NFSv4 recovery directory to recdir. | |
4166 | */ | |
4167 | int | |
4168 | nfs4_reset_recoverydir(char *recdir) | |
4169 | { | |
4170 | int status; | |
a63bb996 | 4171 | struct path path; |
0964a3d3 | 4172 | |
a63bb996 | 4173 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4174 | if (status) |
4175 | return status; | |
4176 | status = -ENOTDIR; | |
a63bb996 | 4177 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4178 | nfs4_set_recdir(recdir); |
4179 | status = 0; | |
4180 | } | |
a63bb996 | 4181 | path_put(&path); |
0964a3d3 N |
4182 | return status; |
4183 | } | |
4184 | ||
3dd98a3b JL |
4185 | char * |
4186 | nfs4_recoverydir(void) | |
4187 | { | |
4188 | return user_recovery_dirname; | |
4189 | } | |
4190 | ||
1da177e4 LT |
4191 | /* |
4192 | * Called when leasetime is changed. | |
4193 | * | |
d99a05ad N |
4194 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
4195 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
4196 | * we start to register any changes in lease time. If the administrator | |
4197 | * really wants to change the lease time *now*, they can go ahead and bring | |
4198 | * nfsd down and then back up again after changing the lease time. | |
3dd98a3b JL |
4199 | * |
4200 | * user_lease_time is protected by nfsd_mutex since it's only really accessed | |
4201 | * when nfsd is starting | |
1da177e4 LT |
4202 | */ |
4203 | void | |
4204 | nfs4_reset_lease(time_t leasetime) | |
4205 | { | |
d99a05ad | 4206 | user_lease_time = leasetime; |
1da177e4 | 4207 | } |