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1da177e4 LT |
1 | /* |
2 | * linux/fs/nfsd/nfs4state.c | |
3 | * | |
4 | * Copyright (c) 2001 The Regents of the University of Michigan. | |
5 | * All rights reserved. | |
6 | * | |
7 | * Kendrick Smith <kmsmith@umich.edu> | |
8 | * Andy Adamson <kandros@umich.edu> | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions and the following disclaimer. | |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in the | |
18 | * documentation and/or other materials provided with the distribution. | |
19 | * 3. Neither the name of the University nor the names of its | |
20 | * contributors may be used to endorse or promote products derived | |
21 | * from this software without specific prior written permission. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
34 | * | |
35 | */ | |
36 | ||
37 | #include <linux/param.h> | |
38 | #include <linux/major.h> | |
39 | #include <linux/slab.h> | |
40 | ||
41 | #include <linux/sunrpc/svc.h> | |
42 | #include <linux/nfsd/nfsd.h> | |
43 | #include <linux/nfsd/cache.h> | |
aceaf78d | 44 | #include <linux/file.h> |
1da177e4 LT |
45 | #include <linux/mount.h> |
46 | #include <linux/workqueue.h> | |
47 | #include <linux/smp_lock.h> | |
48 | #include <linux/kthread.h> | |
49 | #include <linux/nfs4.h> | |
50 | #include <linux/nfsd/state.h> | |
51 | #include <linux/nfsd/xdr4.h> | |
0964a3d3 | 52 | #include <linux/namei.h> |
c2f1a551 | 53 | #include <linux/swap.h> |
353ab6e9 | 54 | #include <linux/mutex.h> |
fd85b817 | 55 | #include <linux/lockd/bind.h> |
9a8db97e | 56 | #include <linux/module.h> |
68e76ad0 | 57 | #include <linux/sunrpc/svcauth_gss.h> |
1da177e4 LT |
58 | |
59 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
60 | ||
61 | /* Globals */ | |
62 | static time_t lease_time = 90; /* default lease time */ | |
d99a05ad | 63 | static time_t user_lease_time = 90; |
fd39ca9a | 64 | static time_t boot_time; |
1da177e4 LT |
65 | static u32 current_ownerid = 1; |
66 | static u32 current_fileid = 1; | |
67 | static u32 current_delegid = 1; | |
68 | static u32 nfs4_init; | |
fd39ca9a N |
69 | static stateid_t zerostateid; /* bits all 0 */ |
70 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 71 | static u64 current_sessionid = 1; |
fd39ca9a N |
72 | |
73 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
74 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 75 | |
1da177e4 | 76 | /* forward declarations */ |
fd39ca9a | 77 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 | 78 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
0964a3d3 N |
79 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
80 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 | 81 | |
8b671b80 BF |
82 | /* Locking: */ |
83 | ||
84 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 85 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 86 | |
8b671b80 BF |
87 | /* |
88 | * Currently used for the del_recall_lru and file hash table. In an | |
89 | * effort to decrease the scope of the client_mutex, this spinlock may | |
90 | * eventually cover more: | |
91 | */ | |
92 | static DEFINE_SPINLOCK(recall_lock); | |
93 | ||
e18b890b CL |
94 | static struct kmem_cache *stateowner_slab = NULL; |
95 | static struct kmem_cache *file_slab = NULL; | |
96 | static struct kmem_cache *stateid_slab = NULL; | |
97 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 98 | |
1da177e4 LT |
99 | void |
100 | nfs4_lock_state(void) | |
101 | { | |
353ab6e9 | 102 | mutex_lock(&client_mutex); |
1da177e4 LT |
103 | } |
104 | ||
105 | void | |
106 | nfs4_unlock_state(void) | |
107 | { | |
353ab6e9 | 108 | mutex_unlock(&client_mutex); |
1da177e4 LT |
109 | } |
110 | ||
111 | static inline u32 | |
112 | opaque_hashval(const void *ptr, int nbytes) | |
113 | { | |
114 | unsigned char *cptr = (unsigned char *) ptr; | |
115 | ||
116 | u32 x = 0; | |
117 | while (nbytes--) { | |
118 | x *= 37; | |
119 | x += *cptr++; | |
120 | } | |
121 | return x; | |
122 | } | |
123 | ||
1da177e4 LT |
124 | static struct list_head del_recall_lru; |
125 | ||
13cd2184 N |
126 | static inline void |
127 | put_nfs4_file(struct nfs4_file *fi) | |
128 | { | |
8b671b80 BF |
129 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
130 | list_del(&fi->fi_hash); | |
131 | spin_unlock(&recall_lock); | |
132 | iput(fi->fi_inode); | |
133 | kmem_cache_free(file_slab, fi); | |
134 | } | |
13cd2184 N |
135 | } |
136 | ||
137 | static inline void | |
138 | get_nfs4_file(struct nfs4_file *fi) | |
139 | { | |
8b671b80 | 140 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
141 | } |
142 | ||
ef0f3390 | 143 | static int num_delegations; |
c2f1a551 | 144 | unsigned int max_delegations; |
ef0f3390 N |
145 | |
146 | /* | |
147 | * Open owner state (share locks) | |
148 | */ | |
149 | ||
150 | /* hash tables for nfs4_stateowner */ | |
151 | #define OWNER_HASH_BITS 8 | |
152 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
153 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
154 | ||
155 | #define ownerid_hashval(id) \ | |
156 | ((id) & OWNER_HASH_MASK) | |
157 | #define ownerstr_hashval(clientid, ownername) \ | |
158 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
159 | ||
160 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
161 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
162 | ||
163 | /* hash table for nfs4_file */ | |
164 | #define FILE_HASH_BITS 8 | |
165 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
166 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
167 | /* hash table for (open)nfs4_stateid */ | |
168 | #define STATEID_HASH_BITS 10 | |
169 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
170 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
171 | ||
172 | #define file_hashval(x) \ | |
173 | hash_ptr(x, FILE_HASH_BITS) | |
174 | #define stateid_hashval(owner_id, file_id) \ | |
175 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
176 | ||
177 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
178 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
179 | ||
1da177e4 LT |
180 | static struct nfs4_delegation * |
181 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
182 | { | |
183 | struct nfs4_delegation *dp; | |
184 | struct nfs4_file *fp = stp->st_file; | |
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 | |
0c193054 | 417 | * NFSD_MAX_SLOTS_PER_SESSION and by nfsd_drc_max_mem. |
ec6b5d7b | 418 | * |
0c193054 AA |
419 | * If we run out of reserved DRC memory we should (up to a point) re-negotiate |
420 | * active sessions and reduce their slot usage to make rooom for new | |
421 | * connections. For now we just fail the create session. | |
ec6b5d7b AA |
422 | */ |
423 | static int set_forechannel_maxreqs(struct nfsd4_channel_attrs *fchan) | |
424 | { | |
0c193054 | 425 | int mem; |
ec6b5d7b | 426 | |
5d77ddfb AA |
427 | if (fchan->maxreqs < 1) |
428 | return nfserr_inval; | |
429 | else if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) | |
430 | fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; | |
431 | ||
0c193054 | 432 | mem = fchan->maxreqs * NFSD_SLOT_CACHE_SIZE; |
b101ebbc | 433 | |
4bd9b0f4 | 434 | spin_lock(&nfsd_drc_lock); |
0c193054 AA |
435 | if (mem + nfsd_drc_mem_used > nfsd_drc_max_mem) |
436 | mem = ((nfsd_drc_max_mem - nfsd_drc_mem_used) / | |
437 | NFSD_SLOT_CACHE_SIZE) * NFSD_SLOT_CACHE_SIZE; | |
438 | nfsd_drc_mem_used += mem; | |
4bd9b0f4 | 439 | spin_unlock(&nfsd_drc_lock); |
ec6b5d7b | 440 | |
0c193054 | 441 | fchan->maxreqs = mem / NFSD_SLOT_CACHE_SIZE; |
b101ebbc AA |
442 | if (fchan->maxreqs == 0) |
443 | return nfserr_resource; | |
444 | return 0; | |
ec6b5d7b AA |
445 | } |
446 | ||
447 | /* | |
448 | * fchan holds the client values on input, and the server values on output | |
449 | */ | |
450 | static int init_forechannel_attrs(struct svc_rqst *rqstp, | |
6c18ba9f AB |
451 | struct nfsd4_channel_attrs *session_fchan, |
452 | struct nfsd4_channel_attrs *fchan) | |
ec6b5d7b AA |
453 | { |
454 | int status = 0; | |
455 | __u32 maxcount = svc_max_payload(rqstp); | |
456 | ||
457 | /* headerpadsz set to zero in encode routine */ | |
458 | ||
459 | /* Use the client's max request and max response size if possible */ | |
460 | if (fchan->maxreq_sz > maxcount) | |
461 | fchan->maxreq_sz = maxcount; | |
6c18ba9f | 462 | session_fchan->maxreq_sz = fchan->maxreq_sz; |
ec6b5d7b AA |
463 | |
464 | if (fchan->maxresp_sz > maxcount) | |
465 | fchan->maxresp_sz = maxcount; | |
6c18ba9f | 466 | session_fchan->maxresp_sz = fchan->maxresp_sz; |
ec6b5d7b | 467 | |
0c193054 | 468 | session_fchan->maxresp_cached = NFSD_SLOT_CACHE_SIZE; |
6c18ba9f | 469 | fchan->maxresp_cached = session_fchan->maxresp_cached; |
ec6b5d7b AA |
470 | |
471 | /* Use the client's maxops if possible */ | |
472 | if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) | |
473 | fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; | |
6c18ba9f | 474 | session_fchan->maxops = fchan->maxops; |
ec6b5d7b | 475 | |
ec6b5d7b AA |
476 | /* FIXME: Error means no more DRC pages so the server should |
477 | * recover pages from existing sessions. For now fail session | |
478 | * creation. | |
479 | */ | |
480 | status = set_forechannel_maxreqs(fchan); | |
481 | ||
6c18ba9f | 482 | session_fchan->maxreqs = fchan->maxreqs; |
ec6b5d7b AA |
483 | return status; |
484 | } | |
485 | ||
486 | static int | |
487 | alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, | |
488 | struct nfsd4_create_session *cses) | |
489 | { | |
490 | struct nfsd4_session *new, tmp; | |
491 | int idx, status = nfserr_resource, slotsize; | |
492 | ||
493 | memset(&tmp, 0, sizeof(tmp)); | |
494 | ||
495 | /* FIXME: For now, we just accept the client back channel attributes. */ | |
6c18ba9f AB |
496 | tmp.se_bchannel = cses->back_channel; |
497 | status = init_forechannel_attrs(rqstp, &tmp.se_fchannel, | |
498 | &cses->fore_channel); | |
ec6b5d7b AA |
499 | if (status) |
500 | goto out; | |
501 | ||
502 | /* allocate struct nfsd4_session and slot table in one piece */ | |
6c18ba9f | 503 | slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot); |
ec6b5d7b AA |
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); | |
6c18ba9f | 577 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) { |
14778a13 AA |
578 | struct nfsd4_cache_entry *e = &ses->se_slots[i].sl_cache_entry; |
579 | nfsd4_release_respages(e->ce_respages, e->ce_resused); | |
580 | } | |
be98d1bb | 581 | spin_lock(&nfsd_drc_lock); |
0c193054 | 582 | nfsd_drc_mem_used -= ses->se_fchannel.maxreqs * NFSD_SLOT_CACHE_SIZE; |
be98d1bb | 583 | spin_unlock(&nfsd_drc_lock); |
7116ed6b AA |
584 | kfree(ses); |
585 | } | |
586 | ||
1da177e4 LT |
587 | static inline void |
588 | renew_client(struct nfs4_client *clp) | |
589 | { | |
590 | /* | |
591 | * Move client to the end to the LRU list. | |
592 | */ | |
593 | dprintk("renewing client (clientid %08x/%08x)\n", | |
594 | clp->cl_clientid.cl_boot, | |
595 | clp->cl_clientid.cl_id); | |
596 | list_move_tail(&clp->cl_lru, &client_lru); | |
597 | clp->cl_time = get_seconds(); | |
598 | } | |
599 | ||
600 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
601 | static int | |
602 | STALE_CLIENTID(clientid_t *clid) | |
603 | { | |
604 | if (clid->cl_boot == boot_time) | |
605 | return 0; | |
60adfc50 AA |
606 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
607 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
608 | return 1; |
609 | } | |
610 | ||
611 | /* | |
612 | * XXX Should we use a slab cache ? | |
613 | * This type of memory management is somewhat inefficient, but we use it | |
614 | * anyway since SETCLIENTID is not a common operation. | |
615 | */ | |
35bba9a3 | 616 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
617 | { |
618 | struct nfs4_client *clp; | |
619 | ||
35bba9a3 BF |
620 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
621 | if (clp == NULL) | |
622 | return NULL; | |
623 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
624 | if (clp->cl_name.data == NULL) { | |
625 | kfree(clp); | |
626 | return NULL; | |
1da177e4 | 627 | } |
35bba9a3 BF |
628 | memcpy(clp->cl_name.data, name.data, name.len); |
629 | clp->cl_name.len = name.len; | |
1da177e4 LT |
630 | return clp; |
631 | } | |
632 | ||
1b1a9b31 BF |
633 | static void |
634 | shutdown_callback_client(struct nfs4_client *clp) | |
635 | { | |
c237dc03 | 636 | struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client; |
1b1a9b31 | 637 | |
1b1a9b31 | 638 | if (clnt) { |
404ec117 BF |
639 | /* |
640 | * Callback threads take a reference on the client, so there | |
641 | * should be no outstanding callbacks at this point. | |
642 | */ | |
c237dc03 | 643 | clp->cl_cb_conn.cb_client = NULL; |
1b1a9b31 BF |
644 | rpc_shutdown_client(clnt); |
645 | } | |
c237dc03 BF |
646 | if (clp->cl_cb_conn.cb_cred) { |
647 | put_rpccred(clp->cl_cb_conn.cb_cred); | |
648 | clp->cl_cb_conn.cb_cred = NULL; | |
3cef9ab2 | 649 | } |
1b1a9b31 BF |
650 | } |
651 | ||
1da177e4 LT |
652 | static inline void |
653 | free_client(struct nfs4_client *clp) | |
654 | { | |
1b1a9b31 | 655 | shutdown_callback_client(clp); |
38eb76a5 AA |
656 | nfsd4_release_respages(clp->cl_slot.sl_cache_entry.ce_respages, |
657 | clp->cl_slot.sl_cache_entry.ce_resused); | |
1da177e4 LT |
658 | if (clp->cl_cred.cr_group_info) |
659 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 660 | kfree(clp->cl_principal); |
1da177e4 LT |
661 | kfree(clp->cl_name.data); |
662 | kfree(clp); | |
663 | } | |
664 | ||
665 | void | |
666 | put_nfs4_client(struct nfs4_client *clp) | |
667 | { | |
668 | if (atomic_dec_and_test(&clp->cl_count)) | |
669 | free_client(clp); | |
670 | } | |
671 | ||
672 | static void | |
673 | expire_client(struct nfs4_client *clp) | |
674 | { | |
675 | struct nfs4_stateowner *sop; | |
676 | struct nfs4_delegation *dp; | |
1da177e4 LT |
677 | struct list_head reaplist; |
678 | ||
679 | dprintk("NFSD: expire_client cl_count %d\n", | |
680 | atomic_read(&clp->cl_count)); | |
681 | ||
1da177e4 LT |
682 | INIT_LIST_HEAD(&reaplist); |
683 | spin_lock(&recall_lock); | |
ea1da636 N |
684 | while (!list_empty(&clp->cl_delegations)) { |
685 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
686 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
687 | dp->dl_flock); | |
ea1da636 | 688 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
689 | list_move(&dp->dl_recall_lru, &reaplist); |
690 | } | |
691 | spin_unlock(&recall_lock); | |
692 | while (!list_empty(&reaplist)) { | |
693 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
694 | list_del_init(&dp->dl_recall_lru); | |
695 | unhash_delegation(dp); | |
696 | } | |
697 | list_del(&clp->cl_idhash); | |
698 | list_del(&clp->cl_strhash); | |
699 | list_del(&clp->cl_lru); | |
ea1da636 N |
700 | while (!list_empty(&clp->cl_openowners)) { |
701 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 702 | release_openowner(sop); |
1da177e4 | 703 | } |
c4bf7868 ME |
704 | while (!list_empty(&clp->cl_sessions)) { |
705 | struct nfsd4_session *ses; | |
706 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
707 | se_perclnt); | |
708 | release_session(ses); | |
709 | } | |
1da177e4 LT |
710 | put_nfs4_client(clp); |
711 | } | |
712 | ||
35bba9a3 BF |
713 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) |
714 | { | |
1da177e4 LT |
715 | struct nfs4_client *clp; |
716 | ||
35bba9a3 BF |
717 | clp = alloc_client(name); |
718 | if (clp == NULL) | |
719 | return NULL; | |
a55370a3 | 720 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
1da177e4 | 721 | atomic_set(&clp->cl_count, 1); |
c237dc03 | 722 | atomic_set(&clp->cl_cb_conn.cb_set, 0); |
1da177e4 LT |
723 | INIT_LIST_HEAD(&clp->cl_idhash); |
724 | INIT_LIST_HEAD(&clp->cl_strhash); | |
ea1da636 N |
725 | INIT_LIST_HEAD(&clp->cl_openowners); |
726 | INIT_LIST_HEAD(&clp->cl_delegations); | |
9fb87070 | 727 | INIT_LIST_HEAD(&clp->cl_sessions); |
1da177e4 | 728 | INIT_LIST_HEAD(&clp->cl_lru); |
1da177e4 LT |
729 | return clp; |
730 | } | |
731 | ||
35bba9a3 BF |
732 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
733 | { | |
734 | memcpy(target->cl_verifier.data, source->data, | |
735 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
736 | } |
737 | ||
35bba9a3 BF |
738 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
739 | { | |
1da177e4 LT |
740 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
741 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
742 | } | |
743 | ||
35bba9a3 BF |
744 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
745 | { | |
1da177e4 LT |
746 | target->cr_uid = source->cr_uid; |
747 | target->cr_gid = source->cr_gid; | |
748 | target->cr_group_info = source->cr_group_info; | |
749 | get_group_info(target->cr_group_info); | |
750 | } | |
751 | ||
35bba9a3 | 752 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 753 | { |
a55370a3 | 754 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
755 | } |
756 | ||
757 | static int | |
599e0a22 BF |
758 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
759 | { | |
760 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
761 | } |
762 | ||
763 | static int | |
599e0a22 BF |
764 | same_clid(clientid_t *cl1, clientid_t *cl2) |
765 | { | |
766 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
767 | } |
768 | ||
769 | /* XXX what about NGROUP */ | |
770 | static int | |
599e0a22 BF |
771 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
772 | { | |
773 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
774 | } |
775 | ||
5ec7b46c BF |
776 | static void gen_clid(struct nfs4_client *clp) |
777 | { | |
778 | static u32 current_clientid = 1; | |
779 | ||
1da177e4 LT |
780 | clp->cl_clientid.cl_boot = boot_time; |
781 | clp->cl_clientid.cl_id = current_clientid++; | |
782 | } | |
783 | ||
deda2faa BF |
784 | static void gen_confirm(struct nfs4_client *clp) |
785 | { | |
786 | static u32 i; | |
787 | u32 *p; | |
1da177e4 | 788 | |
1da177e4 | 789 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
790 | *p++ = get_seconds(); |
791 | *p++ = i++; | |
1da177e4 LT |
792 | } |
793 | ||
35bba9a3 BF |
794 | static int check_name(struct xdr_netobj name) |
795 | { | |
1da177e4 LT |
796 | if (name.len == 0) |
797 | return 0; | |
798 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 799 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
800 | return 0; |
801 | } | |
802 | return 1; | |
803 | } | |
804 | ||
fd39ca9a | 805 | static void |
1da177e4 LT |
806 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
807 | { | |
808 | unsigned int idhashval; | |
809 | ||
810 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
811 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
812 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
813 | list_add_tail(&clp->cl_lru, &client_lru); | |
814 | clp->cl_time = get_seconds(); | |
815 | } | |
816 | ||
fd39ca9a | 817 | static void |
1da177e4 LT |
818 | move_to_confirmed(struct nfs4_client *clp) |
819 | { | |
820 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
821 | unsigned int strhashval; | |
822 | ||
823 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
824 | list_del_init(&clp->cl_strhash); | |
f116629d | 825 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 826 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
827 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
828 | renew_client(clp); | |
829 | } | |
830 | ||
831 | static struct nfs4_client * | |
832 | find_confirmed_client(clientid_t *clid) | |
833 | { | |
834 | struct nfs4_client *clp; | |
835 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
836 | ||
837 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 838 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
839 | return clp; |
840 | } | |
841 | return NULL; | |
842 | } | |
843 | ||
844 | static struct nfs4_client * | |
845 | find_unconfirmed_client(clientid_t *clid) | |
846 | { | |
847 | struct nfs4_client *clp; | |
848 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
849 | ||
850 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 851 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
852 | return clp; |
853 | } | |
854 | return NULL; | |
855 | } | |
856 | ||
a1bcecd2 AA |
857 | /* |
858 | * Return 1 iff clp's clientid establishment method matches the use_exchange_id | |
859 | * parameter. Matching is based on the fact the at least one of the | |
860 | * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 | |
861 | * | |
862 | * FIXME: we need to unify the clientid namespaces for nfsv4.x | |
863 | * and correctly deal with client upgrade/downgrade in EXCHANGE_ID | |
864 | * and SET_CLIENTID{,_CONFIRM} | |
865 | */ | |
866 | static inline int | |
867 | match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) | |
868 | { | |
869 | bool has_exchange_flags = (clp->cl_exchange_flags != 0); | |
870 | return use_exchange_id == has_exchange_flags; | |
871 | } | |
872 | ||
28ce6054 | 873 | static struct nfs4_client * |
a1bcecd2 AA |
874 | find_confirmed_client_by_str(const char *dname, unsigned int hashval, |
875 | bool use_exchange_id) | |
28ce6054 N |
876 | { |
877 | struct nfs4_client *clp; | |
878 | ||
879 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
880 | if (same_name(clp->cl_recdir, dname) && |
881 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
882 | return clp; |
883 | } | |
884 | return NULL; | |
885 | } | |
886 | ||
887 | static struct nfs4_client * | |
a1bcecd2 AA |
888 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, |
889 | bool use_exchange_id) | |
28ce6054 N |
890 | { |
891 | struct nfs4_client *clp; | |
892 | ||
893 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
894 | if (same_name(clp->cl_recdir, dname) && |
895 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
896 | return clp; |
897 | } | |
898 | return NULL; | |
899 | } | |
900 | ||
1da177e4 LT |
901 | /* a helper function for parse_callback */ |
902 | static int | |
903 | parse_octet(unsigned int *lenp, char **addrp) | |
904 | { | |
905 | unsigned int len = *lenp; | |
906 | char *p = *addrp; | |
907 | int n = -1; | |
908 | char c; | |
909 | ||
910 | for (;;) { | |
911 | if (!len) | |
912 | break; | |
913 | len--; | |
914 | c = *p++; | |
915 | if (c == '.') | |
916 | break; | |
917 | if ((c < '0') || (c > '9')) { | |
918 | n = -1; | |
919 | break; | |
920 | } | |
921 | if (n < 0) | |
922 | n = 0; | |
923 | n = (n * 10) + (c - '0'); | |
924 | if (n > 255) { | |
925 | n = -1; | |
926 | break; | |
927 | } | |
928 | } | |
929 | *lenp = len; | |
930 | *addrp = p; | |
931 | return n; | |
932 | } | |
933 | ||
934 | /* parse and set the setclientid ipv4 callback address */ | |
fd39ca9a | 935 | static int |
1da177e4 LT |
936 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
937 | { | |
938 | int temp = 0; | |
939 | u32 cbaddr = 0; | |
940 | u16 cbport = 0; | |
941 | u32 addrlen = addr_len; | |
942 | char *addr = addr_val; | |
943 | int i, shift; | |
944 | ||
945 | /* ipaddress */ | |
946 | shift = 24; | |
947 | for(i = 4; i > 0 ; i--) { | |
948 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
949 | return 0; | |
950 | } | |
951 | cbaddr |= (temp << shift); | |
952 | if (shift > 0) | |
953 | shift -= 8; | |
954 | } | |
955 | *cbaddrp = cbaddr; | |
956 | ||
957 | /* port */ | |
958 | shift = 8; | |
959 | for(i = 2; i > 0 ; i--) { | |
960 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
961 | return 0; | |
962 | } | |
963 | cbport |= (temp << shift); | |
964 | if (shift > 0) | |
965 | shift -= 8; | |
966 | } | |
967 | *cbportp = cbport; | |
968 | return 1; | |
969 | } | |
970 | ||
fd39ca9a | 971 | static void |
1da177e4 LT |
972 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
973 | { | |
c237dc03 | 974 | struct nfs4_cb_conn *cb = &clp->cl_cb_conn; |
1da177e4 LT |
975 | |
976 | /* Currently, we only support tcp for the callback channel */ | |
977 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) | |
978 | goto out_err; | |
979 | ||
980 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, | |
981 | &cb->cb_addr, &cb->cb_port))) | |
982 | goto out_err; | |
ab52ae6d | 983 | cb->cb_minorversion = 0; |
1da177e4 LT |
984 | cb->cb_prog = se->se_callback_prog; |
985 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
986 | return; |
987 | out_err: | |
849823c5 | 988 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
989 | "will not receive delegations\n", |
990 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
991 | ||
1da177e4 LT |
992 | return; |
993 | } | |
994 | ||
074fe897 AA |
995 | void |
996 | nfsd4_set_statp(struct svc_rqst *rqstp, __be32 *statp) | |
997 | { | |
998 | struct nfsd4_compoundres *resp = rqstp->rq_resp; | |
999 | ||
1000 | resp->cstate.statp = statp; | |
1001 | } | |
1002 | ||
1003 | /* | |
1004 | * Dereference the result pages. | |
1005 | */ | |
1006 | static void | |
1007 | nfsd4_release_respages(struct page **respages, short resused) | |
1008 | { | |
1009 | int i; | |
1010 | ||
1011 | dprintk("--> %s\n", __func__); | |
1012 | for (i = 0; i < resused; i++) { | |
1013 | if (!respages[i]) | |
1014 | continue; | |
1015 | put_page(respages[i]); | |
1016 | respages[i] = NULL; | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | static void | |
1021 | nfsd4_copy_pages(struct page **topages, struct page **frompages, short count) | |
1022 | { | |
1023 | int i; | |
1024 | ||
1025 | for (i = 0; i < count; i++) { | |
1026 | topages[i] = frompages[i]; | |
1027 | if (!topages[i]) | |
1028 | continue; | |
1029 | get_page(topages[i]); | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * Cache the reply pages up to NFSD_PAGES_PER_SLOT + 1, clearing the previous | |
1035 | * pages. We add a page to NFSD_PAGES_PER_SLOT for the case where the total | |
1036 | * length of the XDR response is less than se_fmaxresp_cached | |
1037 | * (NFSD_PAGES_PER_SLOT * PAGE_SIZE) but the xdr_buf pages is used for a | |
1038 | * of the reply (e.g. readdir). | |
1039 | * | |
1040 | * Store the base and length of the rq_req.head[0] page | |
1041 | * of the NFSv4.1 data, just past the rpc header. | |
1042 | */ | |
1043 | void | |
1044 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
1045 | { | |
1046 | struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; | |
1047 | struct svc_rqst *rqstp = resp->rqstp; | |
1048 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
1049 | struct nfsd4_op *op = &args->ops[resp->opcnt]; | |
1050 | struct kvec *resv = &rqstp->rq_res.head[0]; | |
1051 | ||
1052 | dprintk("--> %s entry %p\n", __func__, entry); | |
1053 | ||
1054 | /* Don't cache a failed OP_SEQUENCE. */ | |
1055 | if (resp->opcnt == 1 && op->opnum == OP_SEQUENCE && resp->cstate.status) | |
1056 | return; | |
bf864a31 | 1057 | |
074fe897 | 1058 | nfsd4_release_respages(entry->ce_respages, entry->ce_resused); |
bf864a31 AA |
1059 | entry->ce_opcnt = resp->opcnt; |
1060 | entry->ce_status = resp->cstate.status; | |
1061 | ||
1062 | /* | |
1063 | * Don't need a page to cache just the sequence operation - the slot | |
1064 | * does this for us! | |
1065 | */ | |
1066 | ||
1067 | if (nfsd4_not_cached(resp)) { | |
1068 | entry->ce_resused = 0; | |
1069 | entry->ce_rpchdrlen = 0; | |
1070 | dprintk("%s Just cache SEQUENCE. ce_cachethis %d\n", __func__, | |
1071 | resp->cstate.slot->sl_cache_entry.ce_cachethis); | |
1072 | return; | |
1073 | } | |
074fe897 AA |
1074 | entry->ce_resused = rqstp->rq_resused; |
1075 | if (entry->ce_resused > NFSD_PAGES_PER_SLOT + 1) | |
1076 | entry->ce_resused = NFSD_PAGES_PER_SLOT + 1; | |
1077 | nfsd4_copy_pages(entry->ce_respages, rqstp->rq_respages, | |
1078 | entry->ce_resused); | |
074fe897 AA |
1079 | entry->ce_datav.iov_base = resp->cstate.statp; |
1080 | entry->ce_datav.iov_len = resv->iov_len - ((char *)resp->cstate.statp - | |
1081 | (char *)page_address(rqstp->rq_respages[0])); | |
074fe897 AA |
1082 | /* Current request rpc header length*/ |
1083 | entry->ce_rpchdrlen = (char *)resp->cstate.statp - | |
1084 | (char *)page_address(rqstp->rq_respages[0]); | |
1085 | } | |
1086 | ||
1087 | /* | |
1088 | * We keep the rpc header, but take the nfs reply from the replycache. | |
1089 | */ | |
1090 | static int | |
1091 | nfsd41_copy_replay_data(struct nfsd4_compoundres *resp, | |
1092 | struct nfsd4_cache_entry *entry) | |
1093 | { | |
1094 | struct svc_rqst *rqstp = resp->rqstp; | |
1095 | struct kvec *resv = &resp->rqstp->rq_res.head[0]; | |
1096 | int len; | |
1097 | ||
1098 | /* Current request rpc header length*/ | |
1099 | len = (char *)resp->cstate.statp - | |
1100 | (char *)page_address(rqstp->rq_respages[0]); | |
1101 | if (entry->ce_datav.iov_len + len > PAGE_SIZE) { | |
1102 | dprintk("%s v41 cached reply too large (%Zd).\n", __func__, | |
1103 | entry->ce_datav.iov_len); | |
1104 | return 0; | |
1105 | } | |
1106 | /* copy the cached reply nfsd data past the current rpc header */ | |
1107 | memcpy((char *)resv->iov_base + len, entry->ce_datav.iov_base, | |
1108 | entry->ce_datav.iov_len); | |
1109 | resv->iov_len = len + entry->ce_datav.iov_len; | |
1110 | return 1; | |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * Keep the first page of the replay. Copy the NFSv4.1 data from the first | |
1115 | * cached page. Replace any futher replay pages from the cache. | |
1116 | */ | |
1117 | __be32 | |
bf864a31 AA |
1118 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1119 | struct nfsd4_sequence *seq) | |
074fe897 AA |
1120 | { |
1121 | struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; | |
1122 | __be32 status; | |
1123 | ||
1124 | dprintk("--> %s entry %p\n", __func__, entry); | |
1125 | ||
bf864a31 AA |
1126 | /* |
1127 | * If this is just the sequence operation, we did not keep | |
1128 | * a page in the cache entry because we can just use the | |
1129 | * slot info stored in struct nfsd4_sequence that was checked | |
1130 | * against the slot in nfsd4_sequence(). | |
1131 | * | |
1132 | * This occurs when seq->cachethis is FALSE, or when the client | |
1133 | * session inactivity timer fires and a solo sequence operation | |
1134 | * is sent (lease renewal). | |
1135 | */ | |
1136 | if (seq && nfsd4_not_cached(resp)) { | |
6c18ba9f | 1137 | seq->maxslots = resp->cstate.session->se_fchannel.maxreqs; |
bf864a31 AA |
1138 | return nfs_ok; |
1139 | } | |
074fe897 AA |
1140 | |
1141 | if (!nfsd41_copy_replay_data(resp, entry)) { | |
1142 | /* | |
1143 | * Not enough room to use the replay rpc header, send the | |
1144 | * cached header. Release all the allocated result pages. | |
1145 | */ | |
1146 | svc_free_res_pages(resp->rqstp); | |
1147 | nfsd4_copy_pages(resp->rqstp->rq_respages, entry->ce_respages, | |
1148 | entry->ce_resused); | |
1149 | } else { | |
1150 | /* Release all but the first allocated result page */ | |
1151 | ||
1152 | resp->rqstp->rq_resused--; | |
1153 | svc_free_res_pages(resp->rqstp); | |
1154 | ||
1155 | nfsd4_copy_pages(&resp->rqstp->rq_respages[1], | |
1156 | &entry->ce_respages[1], | |
1157 | entry->ce_resused - 1); | |
1158 | } | |
1159 | ||
1160 | resp->rqstp->rq_resused = entry->ce_resused; | |
da3846a2 AA |
1161 | resp->opcnt = entry->ce_opcnt; |
1162 | resp->cstate.iovlen = entry->ce_datav.iov_len + entry->ce_rpchdrlen; | |
074fe897 AA |
1163 | status = entry->ce_status; |
1164 | ||
1165 | return status; | |
1166 | } | |
1167 | ||
0733d213 AA |
1168 | /* |
1169 | * Set the exchange_id flags returned by the server. | |
1170 | */ | |
1171 | static void | |
1172 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1173 | { | |
1174 | /* pNFS is not supported */ | |
1175 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1176 | ||
1177 | /* Referrals are supported, Migration is not. */ | |
1178 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1179 | ||
1180 | /* set the wire flags to return to client. */ | |
1181 | clid->flags = new->cl_exchange_flags; | |
1182 | } | |
1183 | ||
069b6ad4 AA |
1184 | __be32 |
1185 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1186 | struct nfsd4_compound_state *cstate, | |
1187 | struct nfsd4_exchange_id *exid) | |
1188 | { | |
0733d213 AA |
1189 | struct nfs4_client *unconf, *conf, *new; |
1190 | int status; | |
1191 | unsigned int strhashval; | |
1192 | char dname[HEXDIR_LEN]; | |
1193 | nfs4_verifier verf = exid->verifier; | |
1194 | u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr; | |
1195 | ||
1196 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " | |
1197 | " ip_addr=%u flags %x, spa_how %d\n", | |
1198 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, | |
1199 | ip_addr, exid->flags, exid->spa_how); | |
1200 | ||
1201 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1202 | return nfserr_inval; | |
1203 | ||
1204 | /* Currently only support SP4_NONE */ | |
1205 | switch (exid->spa_how) { | |
1206 | case SP4_NONE: | |
1207 | break; | |
1208 | case SP4_SSV: | |
1209 | return nfserr_encr_alg_unsupp; | |
1210 | default: | |
1211 | BUG(); /* checked by xdr code */ | |
1212 | case SP4_MACH_CRED: | |
1213 | return nfserr_serverfault; /* no excuse :-/ */ | |
1214 | } | |
1215 | ||
1216 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1217 | ||
1218 | if (status) | |
1219 | goto error; | |
1220 | ||
1221 | strhashval = clientstr_hashval(dname); | |
1222 | ||
1223 | nfs4_lock_state(); | |
1224 | status = nfs_ok; | |
1225 | ||
a1bcecd2 | 1226 | conf = find_confirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1227 | if (conf) { |
1228 | if (!same_verf(&verf, &conf->cl_verifier)) { | |
1229 | /* 18.35.4 case 8 */ | |
1230 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1231 | status = nfserr_not_same; | |
1232 | goto out; | |
1233 | } | |
1234 | /* Client reboot: destroy old state */ | |
1235 | expire_client(conf); | |
1236 | goto out_new; | |
1237 | } | |
1238 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1239 | /* 18.35.4 case 9 */ | |
1240 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1241 | status = nfserr_perm; | |
1242 | goto out; | |
1243 | } | |
1244 | expire_client(conf); | |
1245 | goto out_new; | |
1246 | } | |
0733d213 AA |
1247 | /* |
1248 | * Set bit when the owner id and verifier map to an already | |
1249 | * confirmed client id (18.35.3). | |
1250 | */ | |
1251 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1252 | ||
1253 | /* | |
1254 | * Falling into 18.35.4 case 2, possible router replay. | |
1255 | * Leave confirmed record intact and return same result. | |
1256 | */ | |
1257 | copy_verf(conf, &verf); | |
1258 | new = conf; | |
1259 | goto out_copy; | |
6ddbbbfe MS |
1260 | } |
1261 | ||
1262 | /* 18.35.4 case 7 */ | |
1263 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1264 | status = nfserr_noent; | |
1265 | goto out; | |
0733d213 AA |
1266 | } |
1267 | ||
a1bcecd2 | 1268 | unconf = find_unconfirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1269 | if (unconf) { |
1270 | /* | |
1271 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1272 | * a new unconfirmed record should be generated regardless | |
1273 | * of whether any properties have changed. | |
1274 | */ | |
1275 | expire_client(unconf); | |
1276 | } | |
1277 | ||
1278 | out_new: | |
1279 | /* Normal case */ | |
1280 | new = create_client(exid->clname, dname); | |
1281 | if (new == NULL) { | |
1282 | status = nfserr_resource; | |
1283 | goto out; | |
1284 | } | |
1285 | ||
1286 | copy_verf(new, &verf); | |
1287 | copy_cred(&new->cl_cred, &rqstp->rq_cred); | |
1288 | new->cl_addr = ip_addr; | |
1289 | gen_clid(new); | |
1290 | gen_confirm(new); | |
1291 | add_to_unconfirmed(new, strhashval); | |
1292 | out_copy: | |
1293 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1294 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1295 | ||
38eb76a5 AA |
1296 | new->cl_slot.sl_seqid = 0; |
1297 | exid->seqid = 1; | |
0733d213 AA |
1298 | nfsd4_set_ex_flags(new, exid); |
1299 | ||
1300 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
38eb76a5 | 1301 | new->cl_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1302 | status = nfs_ok; |
1303 | ||
1304 | out: | |
1305 | nfs4_unlock_state(); | |
1306 | error: | |
1307 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1308 | return status; | |
069b6ad4 AA |
1309 | } |
1310 | ||
b85d4c01 | 1311 | static int |
88e588d5 | 1312 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1313 | { |
88e588d5 AA |
1314 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1315 | slot_seqid); | |
b85d4c01 BH |
1316 | |
1317 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1318 | if (slot_inuse) { |
1319 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1320 | return nfserr_jukebox; |
1321 | else | |
1322 | return nfserr_seq_misordered; | |
1323 | } | |
1324 | /* Normal */ | |
88e588d5 | 1325 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1326 | return nfs_ok; |
1327 | /* Replay */ | |
88e588d5 | 1328 | if (seqid == slot_seqid) |
b85d4c01 BH |
1329 | return nfserr_replay_cache; |
1330 | /* Wraparound */ | |
88e588d5 | 1331 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1332 | return nfs_ok; |
1333 | /* Misordered replay or misordered new request */ | |
1334 | return nfserr_seq_misordered; | |
1335 | } | |
1336 | ||
069b6ad4 AA |
1337 | __be32 |
1338 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1339 | struct nfsd4_compound_state *cstate, | |
1340 | struct nfsd4_create_session *cr_ses) | |
1341 | { | |
ec6b5d7b | 1342 | u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr; |
38eb76a5 | 1343 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
ec6b5d7b | 1344 | struct nfs4_client *conf, *unconf; |
38eb76a5 | 1345 | struct nfsd4_slot *slot = NULL; |
ec6b5d7b AA |
1346 | int status = 0; |
1347 | ||
1348 | nfs4_lock_state(); | |
1349 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1350 | conf = find_confirmed_client(&cr_ses->clientid); | |
1351 | ||
1352 | if (conf) { | |
38eb76a5 | 1353 | slot = &conf->cl_slot; |
88e588d5 AA |
1354 | status = check_slot_seqid(cr_ses->seqid, slot->sl_seqid, |
1355 | slot->sl_inuse); | |
38eb76a5 | 1356 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1357 | dprintk("Got a create_session replay! seqid= %d\n", |
38eb76a5 AA |
1358 | slot->sl_seqid); |
1359 | cstate->slot = slot; | |
1360 | cstate->status = status; | |
1361 | /* Return the cached reply status */ | |
bf864a31 | 1362 | status = nfsd4_replay_cache_entry(resp, NULL); |
38eb76a5 AA |
1363 | goto out; |
1364 | } else if (cr_ses->seqid != conf->cl_slot.sl_seqid + 1) { | |
ec6b5d7b AA |
1365 | status = nfserr_seq_misordered; |
1366 | dprintk("Sequence misordered!\n"); | |
1367 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
38eb76a5 | 1368 | slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1369 | goto out; |
1370 | } | |
38eb76a5 | 1371 | conf->cl_slot.sl_seqid++; |
ec6b5d7b AA |
1372 | } else if (unconf) { |
1373 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
1374 | (ip_addr != unconf->cl_addr)) { | |
1375 | status = nfserr_clid_inuse; | |
1376 | goto out; | |
1377 | } | |
1378 | ||
38eb76a5 | 1379 | slot = &unconf->cl_slot; |
88e588d5 AA |
1380 | status = check_slot_seqid(cr_ses->seqid, slot->sl_seqid, |
1381 | slot->sl_inuse); | |
38eb76a5 AA |
1382 | if (status) { |
1383 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b AA |
1384 | status = nfserr_seq_misordered; |
1385 | goto out; | |
1386 | } | |
1387 | ||
38eb76a5 | 1388 | slot->sl_seqid++; /* from 0 to 1 */ |
ec6b5d7b AA |
1389 | move_to_confirmed(unconf); |
1390 | ||
1391 | /* | |
1392 | * We do not support RDMA or persistent sessions | |
1393 | */ | |
1394 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1395 | cr_ses->flags &= ~SESSION4_RDMA; | |
1396 | ||
1397 | conf = unconf; | |
1398 | } else { | |
1399 | status = nfserr_stale_clientid; | |
1400 | goto out; | |
1401 | } | |
1402 | ||
1403 | status = alloc_init_session(rqstp, conf, cr_ses); | |
1404 | if (status) | |
1405 | goto out; | |
1406 | ||
ec6b5d7b AA |
1407 | memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, |
1408 | NFS4_MAX_SESSIONID_LEN); | |
38eb76a5 | 1409 | cr_ses->seqid = slot->sl_seqid; |
ec6b5d7b | 1410 | |
38eb76a5 AA |
1411 | slot->sl_inuse = true; |
1412 | cstate->slot = slot; | |
bf864a31 AA |
1413 | /* Ensure a page is used for the cache */ |
1414 | slot->sl_cache_entry.ce_cachethis = 1; | |
ec6b5d7b AA |
1415 | out: |
1416 | nfs4_unlock_state(); | |
1417 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1418 | return status; | |
069b6ad4 AA |
1419 | } |
1420 | ||
1421 | __be32 | |
1422 | nfsd4_destroy_session(struct svc_rqst *r, | |
1423 | struct nfsd4_compound_state *cstate, | |
1424 | struct nfsd4_destroy_session *sessionid) | |
1425 | { | |
e10e0cfc BH |
1426 | struct nfsd4_session *ses; |
1427 | u32 status = nfserr_badsession; | |
1428 | ||
1429 | /* Notes: | |
1430 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1431 | * - Should we return nfserr_back_chan_busy if waiting for | |
1432 | * callbacks on to-be-destroyed session? | |
1433 | * - Do we need to clear any callback info from previous session? | |
1434 | */ | |
1435 | ||
1436 | dump_sessionid(__func__, &sessionid->sessionid); | |
1437 | spin_lock(&sessionid_lock); | |
1438 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); | |
1439 | if (!ses) { | |
1440 | spin_unlock(&sessionid_lock); | |
1441 | goto out; | |
1442 | } | |
1443 | ||
1444 | unhash_session(ses); | |
1445 | spin_unlock(&sessionid_lock); | |
1446 | ||
1447 | /* wait for callbacks */ | |
1448 | shutdown_callback_client(ses->se_client); | |
1449 | nfsd4_put_session(ses); | |
1450 | status = nfs_ok; | |
1451 | out: | |
1452 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1453 | return status; | |
069b6ad4 AA |
1454 | } |
1455 | ||
1456 | __be32 | |
b85d4c01 | 1457 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1458 | struct nfsd4_compound_state *cstate, |
1459 | struct nfsd4_sequence *seq) | |
1460 | { | |
f9bb94c4 | 1461 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1462 | struct nfsd4_session *session; |
1463 | struct nfsd4_slot *slot; | |
1464 | int status; | |
1465 | ||
f9bb94c4 AA |
1466 | if (resp->opcnt != 1) |
1467 | return nfserr_sequence_pos; | |
1468 | ||
b85d4c01 BH |
1469 | spin_lock(&sessionid_lock); |
1470 | status = nfserr_badsession; | |
1471 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1472 | if (!session) | |
1473 | goto out; | |
1474 | ||
1475 | status = nfserr_badslot; | |
6c18ba9f | 1476 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1477 | goto out; |
1478 | ||
1479 | slot = &session->se_slots[seq->slotid]; | |
1480 | dprintk("%s: slotid %d\n", __func__, seq->slotid); | |
1481 | ||
88e588d5 | 1482 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1483 | if (status == nfserr_replay_cache) { |
1484 | cstate->slot = slot; | |
1485 | cstate->session = session; | |
da3846a2 | 1486 | /* Return the cached reply status and set cstate->status |
bf864a31 AA |
1487 | * for nfsd4_svc_encode_compoundres processing */ |
1488 | status = nfsd4_replay_cache_entry(resp, seq); | |
da3846a2 | 1489 | cstate->status = nfserr_replay_cache; |
b85d4c01 BH |
1490 | goto replay_cache; |
1491 | } | |
1492 | if (status) | |
1493 | goto out; | |
1494 | ||
1495 | /* Success! bump slot seqid */ | |
1496 | slot->sl_inuse = true; | |
1497 | slot->sl_seqid = seq->seqid; | |
bf864a31 AA |
1498 | slot->sl_cache_entry.ce_cachethis = seq->cachethis; |
1499 | /* Always set the cache entry cachethis for solo sequence */ | |
1500 | if (nfsd4_is_solo_sequence(resp)) | |
1501 | slot->sl_cache_entry.ce_cachethis = 1; | |
b85d4c01 BH |
1502 | |
1503 | cstate->slot = slot; | |
1504 | cstate->session = session; | |
1505 | ||
1506 | replay_cache: | |
1507 | /* Renew the clientid on success and on replay. | |
1508 | * Hold a session reference until done processing the compound: | |
1509 | * nfsd4_put_session called only if the cstate slot is set. | |
1510 | */ | |
1511 | renew_client(session->se_client); | |
1512 | nfsd4_get_session(session); | |
1513 | out: | |
1514 | spin_unlock(&sessionid_lock); | |
1515 | dprintk("%s: return %d\n", __func__, ntohl(status)); | |
1516 | return status; | |
069b6ad4 AA |
1517 | } |
1518 | ||
b37ad28b | 1519 | __be32 |
b591480b BF |
1520 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1521 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1522 | { |
27459f09 | 1523 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
1da177e4 LT |
1524 | struct xdr_netobj clname = { |
1525 | .len = setclid->se_namelen, | |
1526 | .data = setclid->se_name, | |
1527 | }; | |
1528 | nfs4_verifier clverifier = setclid->se_verf; | |
1529 | unsigned int strhashval; | |
28ce6054 | 1530 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1531 | __be32 status; |
68e76ad0 | 1532 | char *princ; |
a55370a3 | 1533 | char dname[HEXDIR_LEN]; |
1da177e4 | 1534 | |
1da177e4 | 1535 | if (!check_name(clname)) |
73aea4ec | 1536 | return nfserr_inval; |
1da177e4 | 1537 | |
a55370a3 N |
1538 | status = nfs4_make_rec_clidname(dname, &clname); |
1539 | if (status) | |
73aea4ec | 1540 | return status; |
a55370a3 | 1541 | |
1da177e4 LT |
1542 | /* |
1543 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1544 | * We get here on a DRC miss. | |
1545 | */ | |
1546 | ||
a55370a3 | 1547 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1548 | |
1da177e4 | 1549 | nfs4_lock_state(); |
a1bcecd2 | 1550 | conf = find_confirmed_client_by_str(dname, strhashval, false); |
28ce6054 | 1551 | if (conf) { |
a186e767 | 1552 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1553 | status = nfserr_clid_inuse; |
026722c2 BF |
1554 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
1555 | dprintk("NFSD: setclientid: string in use by client" | |
1556 | " at %pI4\n", &conf->cl_addr); | |
1da177e4 LT |
1557 | goto out; |
1558 | } | |
1da177e4 | 1559 | } |
a186e767 BF |
1560 | /* |
1561 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1562 | * has a description of SETCLIENTID request processing consisting | |
1563 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1564 | */ | |
a1bcecd2 | 1565 | unconf = find_unconfirmed_client_by_str(dname, strhashval, false); |
1da177e4 LT |
1566 | status = nfserr_resource; |
1567 | if (!conf) { | |
a186e767 BF |
1568 | /* |
1569 | * RFC 3530 14.2.33 CASE 4: | |
1570 | * placed first, because it is the normal case | |
1da177e4 LT |
1571 | */ |
1572 | if (unconf) | |
1573 | expire_client(unconf); | |
a55370a3 N |
1574 | new = create_client(clname, dname); |
1575 | if (new == NULL) | |
1da177e4 | 1576 | goto out; |
1da177e4 | 1577 | gen_clid(new); |
599e0a22 | 1578 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1579 | /* |
a186e767 BF |
1580 | * RFC 3530 14.2.33 CASE 1: |
1581 | * probable callback update | |
1da177e4 | 1582 | */ |
31f4a6c1 N |
1583 | if (unconf) { |
1584 | /* Note this is removing unconfirmed {*x***}, | |
1585 | * which is stronger than RFC recommended {vxc**}. | |
1586 | * This has the advantage that there is at most | |
1587 | * one {*x***} in either list at any time. | |
1588 | */ | |
1589 | expire_client(unconf); | |
1da177e4 | 1590 | } |
a55370a3 N |
1591 | new = create_client(clname, dname); |
1592 | if (new == NULL) | |
1da177e4 | 1593 | goto out; |
1da177e4 | 1594 | copy_clid(new, conf); |
1da177e4 LT |
1595 | } else if (!unconf) { |
1596 | /* | |
a186e767 BF |
1597 | * RFC 3530 14.2.33 CASE 2: |
1598 | * probable client reboot; state will be removed if | |
1599 | * confirmed. | |
1da177e4 | 1600 | */ |
a55370a3 N |
1601 | new = create_client(clname, dname); |
1602 | if (new == NULL) | |
1da177e4 | 1603 | goto out; |
1da177e4 | 1604 | gen_clid(new); |
49ba8781 | 1605 | } else { |
a186e767 BF |
1606 | /* |
1607 | * RFC 3530 14.2.33 CASE 3: | |
1608 | * probable client reboot; state will be removed if | |
1609 | * confirmed. | |
1da177e4 LT |
1610 | */ |
1611 | expire_client(unconf); | |
a55370a3 N |
1612 | new = create_client(clname, dname); |
1613 | if (new == NULL) | |
1da177e4 | 1614 | goto out; |
1da177e4 | 1615 | gen_clid(new); |
1da177e4 | 1616 | } |
c175b83c BF |
1617 | copy_verf(new, &clverifier); |
1618 | new->cl_addr = sin->sin_addr.s_addr; | |
61054b14 | 1619 | new->cl_flavor = rqstp->rq_flavor; |
68e76ad0 OK |
1620 | princ = svc_gss_principal(rqstp); |
1621 | if (princ) { | |
1622 | new->cl_principal = kstrdup(princ, GFP_KERNEL); | |
1623 | if (new->cl_principal == NULL) { | |
1624 | free_client(new); | |
1625 | goto out; | |
1626 | } | |
1627 | } | |
c175b83c BF |
1628 | copy_cred(&new->cl_cred, &rqstp->rq_cred); |
1629 | gen_confirm(new); | |
1630 | gen_callback(new, setclid); | |
1631 | add_to_unconfirmed(new, strhashval); | |
1da177e4 LT |
1632 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
1633 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
1634 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
1635 | status = nfs_ok; | |
1636 | out: | |
1637 | nfs4_unlock_state(); | |
1638 | return status; | |
1639 | } | |
1640 | ||
1641 | ||
1642 | /* | |
a186e767 BF |
1643 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
1644 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
1645 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 1646 | */ |
b37ad28b | 1647 | __be32 |
b591480b BF |
1648 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
1649 | struct nfsd4_compound_state *cstate, | |
1650 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 1651 | { |
27459f09 | 1652 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
21ab45a4 | 1653 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
1654 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
1655 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 1656 | __be32 status; |
1da177e4 LT |
1657 | |
1658 | if (STALE_CLIENTID(clid)) | |
1659 | return nfserr_stale_clientid; | |
1660 | /* | |
1661 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1662 | * We get here on a DRC miss. | |
1663 | */ | |
1664 | ||
1665 | nfs4_lock_state(); | |
21ab45a4 N |
1666 | |
1667 | conf = find_confirmed_client(clid); | |
1668 | unconf = find_unconfirmed_client(clid); | |
1669 | ||
1670 | status = nfserr_clid_inuse; | |
27459f09 | 1671 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 | 1672 | goto out; |
27459f09 | 1673 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 N |
1674 | goto out; |
1675 | ||
a186e767 BF |
1676 | /* |
1677 | * section 14.2.34 of RFC 3530 has a description of | |
1678 | * SETCLIENTID_CONFIRM request processing consisting | |
1679 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
1680 | */ | |
366e0c1d | 1681 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
1682 | /* |
1683 | * RFC 3530 14.2.34 CASE 1: | |
1684 | * callback update | |
1685 | */ | |
599e0a22 | 1686 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
1687 | status = nfserr_clid_inuse; |
1688 | else { | |
1a69c179 N |
1689 | /* XXX: We just turn off callbacks until we can handle |
1690 | * change request correctly. */ | |
c237dc03 | 1691 | atomic_set(&conf->cl_cb_conn.cb_set, 0); |
1a69c179 | 1692 | expire_client(unconf); |
1da177e4 | 1693 | status = nfs_ok; |
1a69c179 | 1694 | |
1da177e4 | 1695 | } |
f3aba4e5 | 1696 | } else if (conf && !unconf) { |
a186e767 BF |
1697 | /* |
1698 | * RFC 3530 14.2.34 CASE 2: | |
1699 | * probable retransmitted request; play it safe and | |
1700 | * do nothing. | |
7c79f737 | 1701 | */ |
599e0a22 | 1702 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 1703 | status = nfserr_clid_inuse; |
21ab45a4 | 1704 | else |
1da177e4 | 1705 | status = nfs_ok; |
7c79f737 | 1706 | } else if (!conf && unconf |
599e0a22 | 1707 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
1708 | /* |
1709 | * RFC 3530 14.2.34 CASE 3: | |
1710 | * Normal case; new or rebooted client: | |
7c79f737 | 1711 | */ |
599e0a22 | 1712 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
1713 | status = nfserr_clid_inuse; |
1714 | } else { | |
1a69c179 N |
1715 | unsigned int hash = |
1716 | clientstr_hashval(unconf->cl_recdir); | |
1717 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
a1bcecd2 | 1718 | hash, false); |
1a69c179 | 1719 | if (conf) { |
c7b9a459 | 1720 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
1721 | expire_client(conf); |
1722 | } | |
1da177e4 | 1723 | move_to_confirmed(unconf); |
21ab45a4 | 1724 | conf = unconf; |
46f8a64b | 1725 | nfsd4_probe_callback(conf); |
1a69c179 | 1726 | status = nfs_ok; |
1da177e4 | 1727 | } |
599e0a22 BF |
1728 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
1729 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 1730 | &confirm)))) { |
a186e767 BF |
1731 | /* |
1732 | * RFC 3530 14.2.34 CASE 4: | |
1733 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 1734 | */ |
1da177e4 | 1735 | status = nfserr_stale_clientid; |
7c79f737 | 1736 | } else { |
08e8987c N |
1737 | /* check that we have hit one of the cases...*/ |
1738 | status = nfserr_clid_inuse; | |
1739 | } | |
1da177e4 | 1740 | out: |
1da177e4 LT |
1741 | nfs4_unlock_state(); |
1742 | return status; | |
1743 | } | |
1744 | ||
1da177e4 LT |
1745 | /* OPEN Share state helper functions */ |
1746 | static inline struct nfs4_file * | |
1747 | alloc_init_file(struct inode *ino) | |
1748 | { | |
1749 | struct nfs4_file *fp; | |
1750 | unsigned int hashval = file_hashval(ino); | |
1751 | ||
e60d4398 N |
1752 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
1753 | if (fp) { | |
8b671b80 | 1754 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 1755 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
1756 | INIT_LIST_HEAD(&fp->fi_stateids); |
1757 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8b671b80 | 1758 | spin_lock(&recall_lock); |
1da177e4 | 1759 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
8b671b80 | 1760 | spin_unlock(&recall_lock); |
1da177e4 LT |
1761 | fp->fi_inode = igrab(ino); |
1762 | fp->fi_id = current_fileid++; | |
47f9940c | 1763 | fp->fi_had_conflict = false; |
1da177e4 LT |
1764 | return fp; |
1765 | } | |
1766 | return NULL; | |
1767 | } | |
1768 | ||
e60d4398 | 1769 | static void |
e18b890b | 1770 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1771 | { |
e60d4398 N |
1772 | if (*slab == NULL) |
1773 | return; | |
1a1d92c1 | 1774 | kmem_cache_destroy(*slab); |
e60d4398 | 1775 | *slab = NULL; |
1da177e4 LT |
1776 | } |
1777 | ||
e8ff2a84 | 1778 | void |
1da177e4 LT |
1779 | nfsd4_free_slabs(void) |
1780 | { | |
e60d4398 N |
1781 | nfsd4_free_slab(&stateowner_slab); |
1782 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1783 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1784 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1785 | } |
1da177e4 | 1786 | |
e60d4398 N |
1787 | static int |
1788 | nfsd4_init_slabs(void) | |
1789 | { | |
1790 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 1791 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
1792 | if (stateowner_slab == NULL) |
1793 | goto out_nomem; | |
1794 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 1795 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
1796 | if (file_slab == NULL) |
1797 | goto out_nomem; | |
5ac049ac | 1798 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 1799 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
1800 | if (stateid_slab == NULL) |
1801 | goto out_nomem; | |
5b2d21c1 | 1802 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 1803 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
1804 | if (deleg_slab == NULL) |
1805 | goto out_nomem; | |
e60d4398 N |
1806 | return 0; |
1807 | out_nomem: | |
1808 | nfsd4_free_slabs(); | |
1809 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1810 | return -ENOMEM; | |
1da177e4 LT |
1811 | } |
1812 | ||
1813 | void | |
1814 | nfs4_free_stateowner(struct kref *kref) | |
1815 | { | |
1816 | struct nfs4_stateowner *sop = | |
1817 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1818 | kfree(sop->so_owner.data); | |
1819 | kmem_cache_free(stateowner_slab, sop); | |
1820 | } | |
1821 | ||
1822 | static inline struct nfs4_stateowner * | |
1823 | alloc_stateowner(struct xdr_netobj *owner) | |
1824 | { | |
1825 | struct nfs4_stateowner *sop; | |
1826 | ||
1827 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1828 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1829 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1830 | sop->so_owner.len = owner->len; | |
1831 | kref_init(&sop->so_ref); | |
1832 | return sop; | |
1833 | } | |
1834 | kmem_cache_free(stateowner_slab, sop); | |
1835 | } | |
1836 | return NULL; | |
1837 | } | |
1838 | ||
1839 | static struct nfs4_stateowner * | |
1840 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1841 | struct nfs4_stateowner *sop; | |
1842 | struct nfs4_replay *rp; | |
1843 | unsigned int idhashval; | |
1844 | ||
1845 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1846 | return NULL; | |
1847 | idhashval = ownerid_hashval(current_ownerid); | |
1848 | INIT_LIST_HEAD(&sop->so_idhash); | |
1849 | INIT_LIST_HEAD(&sop->so_strhash); | |
1850 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1851 | INIT_LIST_HEAD(&sop->so_stateids); |
1852 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1853 | INIT_LIST_HEAD(&sop->so_close_lru); |
1854 | sop->so_time = 0; | |
1855 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1856 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1857 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1858 | sop->so_is_open_owner = 1; |
1859 | sop->so_id = current_ownerid++; | |
1860 | sop->so_client = clp; | |
1861 | sop->so_seqid = open->op_seqid; | |
1862 | sop->so_confirmed = 0; | |
1863 | rp = &sop->so_replay; | |
de1ae286 | 1864 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1865 | rp->rp_buflen = 0; |
1866 | rp->rp_buf = rp->rp_ibuf; | |
1867 | return sop; | |
1868 | } | |
1869 | ||
1da177e4 LT |
1870 | static inline void |
1871 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1872 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1873 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1874 | ||
1875 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1876 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1877 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1878 | INIT_LIST_HEAD(&stp->st_perfile); |
1879 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1880 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1881 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1882 | stp->st_stateowner = sop; |
13cd2184 | 1883 | get_nfs4_file(fp); |
1da177e4 | 1884 | stp->st_file = fp; |
78155ed7 | 1885 | stp->st_stateid.si_boot = get_seconds(); |
1da177e4 LT |
1886 | stp->st_stateid.si_stateownerid = sop->so_id; |
1887 | stp->st_stateid.si_fileid = fp->fi_id; | |
1888 | stp->st_stateid.si_generation = 0; | |
1889 | stp->st_access_bmap = 0; | |
1890 | stp->st_deny_bmap = 0; | |
84459a11 AA |
1891 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
1892 | &stp->st_access_bmap); | |
1da177e4 | 1893 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 1894 | stp->st_openstp = NULL; |
1da177e4 LT |
1895 | } |
1896 | ||
fd39ca9a | 1897 | static void |
1da177e4 LT |
1898 | move_to_close_lru(struct nfs4_stateowner *sop) |
1899 | { | |
1900 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1901 | ||
358dd55a | 1902 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1903 | sop->so_time = get_seconds(); |
1904 | } | |
1905 | ||
1da177e4 | 1906 | static int |
599e0a22 BF |
1907 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1908 | clientid_t *clid) | |
1909 | { | |
1910 | return (sop->so_owner.len == owner->len) && | |
1911 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1912 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1913 | } |
1914 | ||
1915 | static struct nfs4_stateowner * | |
1916 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1917 | { | |
1918 | struct nfs4_stateowner *so = NULL; | |
1919 | ||
1920 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1921 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1922 | return so; |
1923 | } | |
1924 | return NULL; | |
1925 | } | |
1926 | ||
1927 | /* search file_hashtbl[] for file */ | |
1928 | static struct nfs4_file * | |
1929 | find_file(struct inode *ino) | |
1930 | { | |
1931 | unsigned int hashval = file_hashval(ino); | |
1932 | struct nfs4_file *fp; | |
1933 | ||
8b671b80 | 1934 | spin_lock(&recall_lock); |
1da177e4 | 1935 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
1936 | if (fp->fi_inode == ino) { |
1937 | get_nfs4_file(fp); | |
8b671b80 | 1938 | spin_unlock(&recall_lock); |
1da177e4 | 1939 | return fp; |
13cd2184 | 1940 | } |
1da177e4 | 1941 | } |
8b671b80 | 1942 | spin_unlock(&recall_lock); |
1da177e4 LT |
1943 | return NULL; |
1944 | } | |
1945 | ||
d87a8ade | 1946 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 1947 | { |
d87a8ade | 1948 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 1949 | return 0; |
d87a8ade AA |
1950 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
1951 | return 0; | |
1952 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
1953 | if (minorversion && x) { | |
1954 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
1955 | return 0; | |
1956 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
1957 | return 0; | |
1958 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
1959 | } | |
1960 | if (x) | |
8838dc43 BF |
1961 | return 0; |
1962 | return 1; | |
ba5a6a19 BF |
1963 | } |
1964 | ||
8838dc43 | 1965 | static inline int deny_valid(u32 x) |
ba5a6a19 | 1966 | { |
8838dc43 BF |
1967 | /* Note: unlike access bits, deny bits may be zero. */ |
1968 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 1969 | } |
1da177e4 | 1970 | |
4f83aa30 BF |
1971 | /* |
1972 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1973 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1974 | * only what share bits are currently in force, but also what | |
1975 | * combinations of share bits previous opens have used. This allows us | |
1976 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1977 | * return an error if the client attempt to downgrade to a combination | |
1978 | * of share bits not explicable by closing some of its previous opens. | |
1979 | * | |
1980 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1981 | * track of access/deny bit combinations; so, e.g., we allow: | |
1982 | * | |
1983 | * OPEN allow read, deny write | |
1984 | * OPEN allow both, deny none | |
1985 | * DOWNGRADE allow read, deny none | |
1986 | * | |
1987 | * which we should reject. | |
1988 | */ | |
fd39ca9a | 1989 | static void |
1da177e4 LT |
1990 | set_access(unsigned int *access, unsigned long bmap) { |
1991 | int i; | |
1992 | ||
1993 | *access = 0; | |
1994 | for (i = 1; i < 4; i++) { | |
1995 | if (test_bit(i, &bmap)) | |
1996 | *access |= i; | |
1997 | } | |
1998 | } | |
1999 | ||
fd39ca9a | 2000 | static void |
1da177e4 LT |
2001 | set_deny(unsigned int *deny, unsigned long bmap) { |
2002 | int i; | |
2003 | ||
2004 | *deny = 0; | |
2005 | for (i = 0; i < 4; i++) { | |
2006 | if (test_bit(i, &bmap)) | |
2007 | *deny |= i ; | |
2008 | } | |
2009 | } | |
2010 | ||
2011 | static int | |
2012 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
2013 | unsigned int access, deny; | |
2014 | ||
2015 | set_access(&access, stp->st_access_bmap); | |
2016 | set_deny(&deny, stp->st_deny_bmap); | |
2017 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
2018 | return 0; | |
2019 | return 1; | |
2020 | } | |
2021 | ||
2022 | /* | |
2023 | * Called to check deny when READ with all zero stateid or | |
2024 | * WRITE with all zero or all one stateid | |
2025 | */ | |
b37ad28b | 2026 | static __be32 |
1da177e4 LT |
2027 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
2028 | { | |
2029 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2030 | struct nfs4_file *fp; | |
2031 | struct nfs4_stateid *stp; | |
b37ad28b | 2032 | __be32 ret; |
1da177e4 LT |
2033 | |
2034 | dprintk("NFSD: nfs4_share_conflict\n"); | |
2035 | ||
2036 | fp = find_file(ino); | |
13cd2184 N |
2037 | if (!fp) |
2038 | return nfs_ok; | |
b700949b | 2039 | ret = nfserr_locked; |
1da177e4 | 2040 | /* Search for conflicting share reservations */ |
13cd2184 N |
2041 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
2042 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
2043 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
2044 | goto out; | |
1da177e4 | 2045 | } |
13cd2184 N |
2046 | ret = nfs_ok; |
2047 | out: | |
2048 | put_nfs4_file(fp); | |
2049 | return ret; | |
1da177e4 LT |
2050 | } |
2051 | ||
2052 | static inline void | |
2053 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
2054 | { | |
2055 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
aceaf78d | 2056 | drop_file_write_access(filp); |
1da177e4 LT |
2057 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
2058 | } | |
2059 | } | |
2060 | ||
1da177e4 LT |
2061 | /* |
2062 | * Spawn a thread to perform a recall on the delegation represented | |
2063 | * by the lease (file_lock) | |
2064 | * | |
2065 | * Called from break_lease() with lock_kernel() held. | |
2066 | * Note: we assume break_lease will only call this *once* for any given | |
2067 | * lease. | |
2068 | */ | |
2069 | static | |
2070 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
2071 | { | |
63e4863f | 2072 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
1da177e4 LT |
2073 | |
2074 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
2075 | if (!dp) | |
2076 | return; | |
2077 | ||
2078 | /* We're assuming the state code never drops its reference | |
2079 | * without first removing the lease. Since we're in this lease | |
2080 | * callback (and since the lease code is serialized by the kernel | |
2081 | * lock) we know the server hasn't removed the lease yet, we know | |
2082 | * it's safe to take a reference: */ | |
2083 | atomic_inc(&dp->dl_count); | |
cfdcad4d | 2084 | atomic_inc(&dp->dl_client->cl_count); |
1da177e4 LT |
2085 | |
2086 | spin_lock(&recall_lock); | |
2087 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
2088 | spin_unlock(&recall_lock); | |
2089 | ||
2090 | /* only place dl_time is set. protected by lock_kernel*/ | |
2091 | dp->dl_time = get_seconds(); | |
2092 | ||
0272e1fd BF |
2093 | /* |
2094 | * We don't want the locks code to timeout the lease for us; | |
2095 | * we'll remove it ourself if the delegation isn't returned | |
2096 | * in time. | |
2097 | */ | |
2098 | fl->fl_break_time = 0; | |
1da177e4 | 2099 | |
63e4863f BF |
2100 | dp->dl_file->fi_had_conflict = true; |
2101 | nfsd4_cb_recall(dp); | |
1da177e4 LT |
2102 | } |
2103 | ||
2104 | /* | |
2105 | * The file_lock is being reapd. | |
2106 | * | |
2107 | * Called by locks_free_lock() with lock_kernel() held. | |
2108 | */ | |
2109 | static | |
2110 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
2111 | { | |
2112 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
2113 | ||
2114 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
2115 | ||
2116 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
2117 | return; | |
2118 | dp->dl_flock = NULL; | |
2119 | } | |
2120 | ||
2121 | /* | |
2122 | * Set the delegation file_lock back pointer. | |
2123 | * | |
a9933cea | 2124 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
2125 | */ |
2126 | static | |
2127 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
2128 | { | |
2129 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
2130 | ||
2131 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
2132 | if (!dp) | |
2133 | return; | |
2134 | dp->dl_flock = new; | |
2135 | } | |
2136 | ||
2137 | /* | |
a9933cea | 2138 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
2139 | */ |
2140 | static | |
2141 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
2142 | { | |
2143 | struct nfs4_delegation *onlistd = | |
2144 | (struct nfs4_delegation *)onlist->fl_owner; | |
2145 | struct nfs4_delegation *tryd = | |
2146 | (struct nfs4_delegation *)try->fl_owner; | |
2147 | ||
2148 | if (onlist->fl_lmops != try->fl_lmops) | |
2149 | return 0; | |
2150 | ||
2151 | return onlistd->dl_client == tryd->dl_client; | |
2152 | } | |
2153 | ||
2154 | ||
2155 | static | |
2156 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2157 | { | |
2158 | if (arg & F_UNLCK) | |
2159 | return lease_modify(onlist, arg); | |
2160 | else | |
2161 | return -EAGAIN; | |
2162 | } | |
2163 | ||
fd39ca9a | 2164 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
2165 | .fl_break = nfsd_break_deleg_cb, |
2166 | .fl_release_private = nfsd_release_deleg_cb, | |
2167 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
2168 | .fl_mylease = nfsd_same_client_deleg_cb, | |
2169 | .fl_change = nfsd_change_deleg_cb, | |
2170 | }; | |
2171 | ||
2172 | ||
b37ad28b | 2173 | __be32 |
6668958f AA |
2174 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2175 | struct nfsd4_open *open) | |
1da177e4 | 2176 | { |
1da177e4 LT |
2177 | clientid_t *clientid = &open->op_clientid; |
2178 | struct nfs4_client *clp = NULL; | |
2179 | unsigned int strhashval; | |
2180 | struct nfs4_stateowner *sop = NULL; | |
2181 | ||
1da177e4 | 2182 | if (!check_name(open->op_owner)) |
0f442aa2 | 2183 | return nfserr_inval; |
1da177e4 LT |
2184 | |
2185 | if (STALE_CLIENTID(&open->op_clientid)) | |
2186 | return nfserr_stale_clientid; | |
2187 | ||
2188 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2189 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2190 | open->op_stateowner = sop; |
2191 | if (!sop) { | |
2192 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2193 | clp = find_confirmed_client(clientid); |
2194 | if (clp == NULL) | |
0f442aa2 BF |
2195 | return nfserr_expired; |
2196 | goto renew; | |
1da177e4 | 2197 | } |
6668958f AA |
2198 | /* When sessions are used, skip open sequenceid processing */ |
2199 | if (nfsd4_has_session(cstate)) | |
2200 | goto renew; | |
0f442aa2 BF |
2201 | if (!sop->so_confirmed) { |
2202 | /* Replace unconfirmed owners without checking for replay. */ | |
2203 | clp = sop->so_client; | |
f044ff83 | 2204 | release_openowner(sop); |
0f442aa2 BF |
2205 | open->op_stateowner = NULL; |
2206 | goto renew; | |
2207 | } | |
2208 | if (open->op_seqid == sop->so_seqid - 1) { | |
2209 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2210 | return nfserr_replay_me; |
0f442aa2 BF |
2211 | /* The original OPEN failed so spectacularly |
2212 | * that we don't even have replay data saved! | |
2213 | * Therefore, we have no choice but to continue | |
2214 | * processing this OPEN; presumably, we'll | |
2215 | * fail again for the same reason. | |
2216 | */ | |
2217 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2218 | goto renew; | |
2219 | } | |
2220 | if (open->op_seqid != sop->so_seqid) | |
2221 | return nfserr_bad_seqid; | |
1da177e4 | 2222 | renew: |
0f442aa2 BF |
2223 | if (open->op_stateowner == NULL) { |
2224 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2225 | if (sop == NULL) | |
2226 | return nfserr_resource; | |
2227 | open->op_stateowner = sop; | |
2228 | } | |
2229 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2230 | renew_client(sop->so_client); |
0f442aa2 | 2231 | return nfs_ok; |
1da177e4 LT |
2232 | } |
2233 | ||
b37ad28b | 2234 | static inline __be32 |
4a6e43e6 N |
2235 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2236 | { | |
2237 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2238 | return nfserr_openmode; | |
2239 | else | |
2240 | return nfs_ok; | |
2241 | } | |
2242 | ||
52f4fb43 N |
2243 | static struct nfs4_delegation * |
2244 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2245 | { | |
2246 | struct nfs4_delegation *dp; | |
2247 | ||
ea1da636 | 2248 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
2249 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
2250 | return dp; | |
2251 | } | |
2252 | return NULL; | |
2253 | } | |
2254 | ||
b37ad28b | 2255 | static __be32 |
567d9829 N |
2256 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2257 | struct nfs4_delegation **dp) | |
2258 | { | |
2259 | int flags; | |
b37ad28b | 2260 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2261 | |
2262 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2263 | if (*dp == NULL) | |
c44c5eeb | 2264 | goto out; |
567d9829 N |
2265 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
2266 | RD_STATE : WR_STATE; | |
2267 | status = nfs4_check_delegmode(*dp, flags); | |
2268 | if (status) | |
2269 | *dp = NULL; | |
c44c5eeb N |
2270 | out: |
2271 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2272 | return nfs_ok; | |
2273 | if (status) | |
2274 | return status; | |
2275 | open->op_stateowner->so_confirmed = 1; | |
2276 | return nfs_ok; | |
567d9829 N |
2277 | } |
2278 | ||
b37ad28b | 2279 | static __be32 |
1da177e4 LT |
2280 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2281 | { | |
2282 | struct nfs4_stateid *local; | |
b37ad28b | 2283 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2284 | struct nfs4_stateowner *sop = open->op_stateowner; |
2285 | ||
8beefa24 | 2286 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2287 | /* ignore lock owners */ |
2288 | if (local->st_stateowner->so_is_open_owner == 0) | |
2289 | continue; | |
2290 | /* remember if we have seen this open owner */ | |
2291 | if (local->st_stateowner == sop) | |
2292 | *stpp = local; | |
2293 | /* check for conflicting share reservations */ | |
2294 | if (!test_share(local, open)) | |
2295 | goto out; | |
2296 | } | |
2297 | status = 0; | |
2298 | out: | |
2299 | return status; | |
2300 | } | |
2301 | ||
5ac049ac N |
2302 | static inline struct nfs4_stateid * |
2303 | nfs4_alloc_stateid(void) | |
2304 | { | |
2305 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2306 | } | |
2307 | ||
b37ad28b | 2308 | static __be32 |
1da177e4 | 2309 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 2310 | struct nfs4_delegation *dp, |
1da177e4 LT |
2311 | struct svc_fh *cur_fh, int flags) |
2312 | { | |
2313 | struct nfs4_stateid *stp; | |
1da177e4 | 2314 | |
5ac049ac | 2315 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2316 | if (stp == NULL) |
2317 | return nfserr_resource; | |
2318 | ||
567d9829 N |
2319 | if (dp) { |
2320 | get_file(dp->dl_vfs_file); | |
2321 | stp->st_vfs_file = dp->dl_vfs_file; | |
2322 | } else { | |
b37ad28b | 2323 | __be32 status; |
567d9829 N |
2324 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
2325 | &stp->st_vfs_file); | |
2326 | if (status) { | |
2327 | if (status == nfserr_dropit) | |
2328 | status = nfserr_jukebox; | |
5ac049ac | 2329 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
2330 | return status; |
2331 | } | |
1da177e4 | 2332 | } |
1da177e4 LT |
2333 | *stpp = stp; |
2334 | return 0; | |
2335 | } | |
2336 | ||
b37ad28b | 2337 | static inline __be32 |
1da177e4 LT |
2338 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2339 | struct nfsd4_open *open) | |
2340 | { | |
2341 | struct iattr iattr = { | |
2342 | .ia_valid = ATTR_SIZE, | |
2343 | .ia_size = 0, | |
2344 | }; | |
2345 | if (!open->op_truncate) | |
2346 | return 0; | |
2347 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2348 | return nfserr_inval; |
1da177e4 LT |
2349 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2350 | } | |
2351 | ||
b37ad28b | 2352 | static __be32 |
1da177e4 LT |
2353 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
2354 | { | |
2355 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 2356 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 2357 | unsigned int share_access, new_writer; |
b37ad28b | 2358 | __be32 status; |
1da177e4 LT |
2359 | |
2360 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
2361 | new_writer = (~share_access) & open->op_share_access |
2362 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 2363 | |
6c26d08f | 2364 | if (new_writer) { |
b37ad28b AV |
2365 | int err = get_write_access(inode); |
2366 | if (err) | |
2367 | return nfserrno(err); | |
e518f056 BH |
2368 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
2369 | if (err) | |
2370 | return nfserrno(err); | |
2371 | file_take_write(filp); | |
6c26d08f | 2372 | } |
1da177e4 LT |
2373 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2374 | if (status) { | |
6c26d08f BF |
2375 | if (new_writer) |
2376 | put_write_access(inode); | |
1da177e4 LT |
2377 | return status; |
2378 | } | |
2379 | /* remember the open */ | |
6c26d08f | 2380 | filp->f_mode |= open->op_share_access; |
b55e0ba1 BF |
2381 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
2382 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1da177e4 LT |
2383 | |
2384 | return nfs_ok; | |
2385 | } | |
2386 | ||
2387 | ||
1da177e4 | 2388 | static void |
37515177 | 2389 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2390 | { |
37515177 N |
2391 | open->op_stateowner->so_confirmed = 1; |
2392 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2393 | } |
2394 | ||
2395 | /* | |
2396 | * Attempt to hand out a delegation. | |
2397 | */ | |
2398 | static void | |
2399 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2400 | { | |
2401 | struct nfs4_delegation *dp; | |
2402 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
c237dc03 | 2403 | struct nfs4_cb_conn *cb = &sop->so_client->cl_cb_conn; |
1da177e4 LT |
2404 | struct file_lock fl, *flp = &fl; |
2405 | int status, flag = 0; | |
2406 | ||
2407 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
2408 | open->op_recall = 0; |
2409 | switch (open->op_claim_type) { | |
2410 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2411 | if (!atomic_read(&cb->cb_set)) | |
2412 | open->op_recall = 1; | |
2413 | flag = open->op_delegate_type; | |
2414 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2415 | goto out; | |
2416 | break; | |
2417 | case NFS4_OPEN_CLAIM_NULL: | |
2418 | /* Let's not give out any delegations till everyone's | |
2419 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2420 | if (locks_in_grace()) |
7b190fec N |
2421 | goto out; |
2422 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
2423 | goto out; | |
2424 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2425 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2426 | else | |
2427 | flag = NFS4_OPEN_DELEGATE_READ; | |
2428 | break; | |
2429 | default: | |
2430 | goto out; | |
2431 | } | |
1da177e4 LT |
2432 | |
2433 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
2434 | if (dp == NULL) { | |
2435 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2436 | goto out; | |
2437 | } | |
2438 | locks_init_lock(&fl); | |
2439 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
2440 | fl.fl_flags = FL_LEASE; | |
9167f501 | 2441 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
2442 | fl.fl_end = OFFSET_MAX; |
2443 | fl.fl_owner = (fl_owner_t)dp; | |
2444 | fl.fl_file = stp->st_vfs_file; | |
2445 | fl.fl_pid = current->tgid; | |
2446 | ||
a9933cea | 2447 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
2448 | * the lock_manager callbacks fl_mylease and fl_change are used |
2449 | */ | |
9167f501 | 2450 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 2451 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 2452 | unhash_delegation(dp); |
1da177e4 LT |
2453 | flag = NFS4_OPEN_DELEGATE_NONE; |
2454 | goto out; | |
2455 | } | |
2456 | ||
2457 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2458 | ||
2459 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | |
2460 | dp->dl_stateid.si_boot, | |
2461 | dp->dl_stateid.si_stateownerid, | |
2462 | dp->dl_stateid.si_fileid, | |
2463 | dp->dl_stateid.si_generation); | |
2464 | out: | |
7b190fec N |
2465 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2466 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2467 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2468 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
2469 | open->op_delegate_type = flag; |
2470 | } | |
2471 | ||
2472 | /* | |
2473 | * called with nfs4_lock_state() held. | |
2474 | */ | |
b37ad28b | 2475 | __be32 |
1da177e4 LT |
2476 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2477 | { | |
6668958f | 2478 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2479 | struct nfs4_file *fp = NULL; |
2480 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2481 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2482 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2483 | __be32 status; |
1da177e4 LT |
2484 | |
2485 | status = nfserr_inval; | |
d87a8ade | 2486 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2487 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2488 | goto out; |
2489 | /* | |
2490 | * Lookup file; if found, lookup stateid and check open request, | |
2491 | * and check for delegations in the process of being recalled. | |
2492 | * If not found, create the nfs4_file struct | |
2493 | */ | |
2494 | fp = find_file(ino); | |
2495 | if (fp) { | |
2496 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2497 | goto out; | |
c44c5eeb N |
2498 | status = nfs4_check_deleg(fp, open, &dp); |
2499 | if (status) | |
2500 | goto out; | |
1da177e4 | 2501 | } else { |
c44c5eeb N |
2502 | status = nfserr_bad_stateid; |
2503 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2504 | goto out; | |
1da177e4 LT |
2505 | status = nfserr_resource; |
2506 | fp = alloc_init_file(ino); | |
2507 | if (fp == NULL) | |
2508 | goto out; | |
2509 | } | |
2510 | ||
2511 | /* | |
2512 | * OPEN the file, or upgrade an existing OPEN. | |
2513 | * If truncate fails, the OPEN fails. | |
2514 | */ | |
2515 | if (stp) { | |
2516 | /* Stateid was found, this is an OPEN upgrade */ | |
2517 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
2518 | if (status) | |
2519 | goto out; | |
444c2c07 | 2520 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
2521 | } else { |
2522 | /* Stateid was not found, this is a new OPEN */ | |
2523 | int flags = 0; | |
9ecb6a08 | 2524 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 2525 | flags |= NFSD_MAY_READ; |
1da177e4 | 2526 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 2527 | flags |= NFSD_MAY_WRITE; |
567d9829 N |
2528 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
2529 | if (status) | |
1da177e4 LT |
2530 | goto out; |
2531 | init_stateid(stp, fp, open); | |
2532 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2533 | if (status) { | |
2283963f | 2534 | release_open_stateid(stp); |
1da177e4 LT |
2535 | goto out; |
2536 | } | |
6668958f AA |
2537 | if (nfsd4_has_session(&resp->cstate)) |
2538 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2539 | } |
2540 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2541 | ||
6668958f AA |
2542 | if (nfsd4_has_session(&resp->cstate)) |
2543 | open->op_stateowner->so_confirmed = 1; | |
2544 | ||
1da177e4 LT |
2545 | /* |
2546 | * Attempt to hand out a delegation. No error return, because the | |
2547 | * OPEN succeeds even if we fail. | |
2548 | */ | |
2549 | nfs4_open_delegation(current_fh, open, stp); | |
2550 | ||
2551 | status = nfs_ok; | |
2552 | ||
2553 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | |
2554 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | |
2555 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | |
2556 | out: | |
13cd2184 N |
2557 | if (fp) |
2558 | put_nfs4_file(fp); | |
37515177 N |
2559 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2560 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2561 | /* |
2562 | * To finish the open response, we just need to set the rflags. | |
2563 | */ | |
2564 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2565 | if (!open->op_stateowner->so_confirmed && |
2566 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2567 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2568 | ||
2569 | return status; | |
2570 | } | |
2571 | ||
b37ad28b | 2572 | __be32 |
b591480b BF |
2573 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2574 | clientid_t *clid) | |
1da177e4 LT |
2575 | { |
2576 | struct nfs4_client *clp; | |
b37ad28b | 2577 | __be32 status; |
1da177e4 LT |
2578 | |
2579 | nfs4_lock_state(); | |
2580 | dprintk("process_renew(%08x/%08x): starting\n", | |
2581 | clid->cl_boot, clid->cl_id); | |
2582 | status = nfserr_stale_clientid; | |
2583 | if (STALE_CLIENTID(clid)) | |
2584 | goto out; | |
2585 | clp = find_confirmed_client(clid); | |
2586 | status = nfserr_expired; | |
2587 | if (clp == NULL) { | |
2588 | /* We assume the client took too long to RENEW. */ | |
2589 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2590 | goto out; | |
2591 | } | |
2592 | renew_client(clp); | |
2593 | status = nfserr_cb_path_down; | |
ea1da636 | 2594 | if (!list_empty(&clp->cl_delegations) |
c237dc03 | 2595 | && !atomic_read(&clp->cl_cb_conn.cb_set)) |
1da177e4 LT |
2596 | goto out; |
2597 | status = nfs_ok; | |
2598 | out: | |
2599 | nfs4_unlock_state(); | |
2600 | return status; | |
2601 | } | |
2602 | ||
af558e33 BF |
2603 | struct lock_manager nfsd4_manager = { |
2604 | }; | |
2605 | ||
a76b4319 | 2606 | static void |
af558e33 | 2607 | nfsd4_end_grace(void) |
a76b4319 N |
2608 | { |
2609 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2610 | nfsd4_recdir_purge_old(); |
af558e33 | 2611 | locks_end_grace(&nfsd4_manager); |
a76b4319 N |
2612 | } |
2613 | ||
fd39ca9a | 2614 | static time_t |
1da177e4 LT |
2615 | nfs4_laundromat(void) |
2616 | { | |
2617 | struct nfs4_client *clp; | |
2618 | struct nfs4_stateowner *sop; | |
2619 | struct nfs4_delegation *dp; | |
2620 | struct list_head *pos, *next, reaplist; | |
2621 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
2622 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
2623 | time_t u, test_val = NFSD_LEASE_TIME; | |
2624 | ||
2625 | nfs4_lock_state(); | |
2626 | ||
2627 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2628 | if (locks_in_grace()) |
2629 | nfsd4_end_grace(); | |
1da177e4 LT |
2630 | list_for_each_safe(pos, next, &client_lru) { |
2631 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2632 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2633 | t = clp->cl_time - cutoff; | |
2634 | if (clientid_val > t) | |
2635 | clientid_val = t; | |
2636 | break; | |
2637 | } | |
2638 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
2639 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2640 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2641 | expire_client(clp); |
2642 | } | |
2643 | INIT_LIST_HEAD(&reaplist); | |
2644 | spin_lock(&recall_lock); | |
2645 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2646 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2647 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
2648 | u = dp->dl_time - cutoff; | |
2649 | if (test_val > u) | |
2650 | test_val = u; | |
2651 | break; | |
2652 | } | |
2653 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
2654 | dp, dp->dl_flock); | |
2655 | list_move(&dp->dl_recall_lru, &reaplist); | |
2656 | } | |
2657 | spin_unlock(&recall_lock); | |
2658 | list_for_each_safe(pos, next, &reaplist) { | |
2659 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2660 | list_del_init(&dp->dl_recall_lru); | |
2661 | unhash_delegation(dp); | |
2662 | } | |
2663 | test_val = NFSD_LEASE_TIME; | |
2664 | list_for_each_safe(pos, next, &close_lru) { | |
2665 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
2666 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
2667 | u = sop->so_time - cutoff; | |
2668 | if (test_val > u) | |
2669 | test_val = u; | |
2670 | break; | |
2671 | } | |
2672 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
2673 | sop->so_id); | |
f044ff83 | 2674 | release_openowner(sop); |
1da177e4 LT |
2675 | } |
2676 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
2677 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
2678 | nfs4_unlock_state(); | |
2679 | return clientid_val; | |
2680 | } | |
2681 | ||
a254b246 HH |
2682 | static struct workqueue_struct *laundry_wq; |
2683 | static void laundromat_main(struct work_struct *); | |
2684 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
2685 | ||
2686 | static void | |
c4028958 | 2687 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
2688 | { |
2689 | time_t t; | |
2690 | ||
2691 | t = nfs4_laundromat(); | |
2692 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 2693 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
2694 | } |
2695 | ||
fd39ca9a | 2696 | static struct nfs4_stateowner * |
f8816512 N |
2697 | search_close_lru(u32 st_id, int flags) |
2698 | { | |
1da177e4 LT |
2699 | struct nfs4_stateowner *local = NULL; |
2700 | ||
1da177e4 LT |
2701 | if (flags & CLOSE_STATE) { |
2702 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
2703 | if (local->so_id == st_id) | |
2704 | return local; | |
2705 | } | |
2706 | } | |
2707 | return NULL; | |
2708 | } | |
2709 | ||
2710 | static inline int | |
2711 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
2712 | { | |
7eaa36e2 | 2713 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
2714 | } |
2715 | ||
2716 | static int | |
2717 | STALE_STATEID(stateid_t *stateid) | |
2718 | { | |
78155ed7 BN |
2719 | if (time_after((unsigned long)boot_time, |
2720 | (unsigned long)stateid->si_boot)) { | |
2721 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", | |
2722 | stateid->si_boot, stateid->si_stateownerid, | |
2723 | stateid->si_fileid, stateid->si_generation); | |
2724 | return 1; | |
2725 | } | |
2726 | return 0; | |
2727 | } | |
2728 | ||
2729 | static int | |
2730 | EXPIRED_STATEID(stateid_t *stateid) | |
2731 | { | |
2732 | if (time_before((unsigned long)boot_time, | |
2733 | ((unsigned long)stateid->si_boot)) && | |
b8fd47ae | 2734 | time_before((unsigned long)(stateid->si_boot + lease_time), get_seconds())) { |
78155ed7 BN |
2735 | dprintk("NFSD: expired stateid (%08x/%08x/%08x/%08x)!\n", |
2736 | stateid->si_boot, stateid->si_stateownerid, | |
2737 | stateid->si_fileid, stateid->si_generation); | |
2738 | return 1; | |
2739 | } | |
2740 | return 0; | |
2741 | } | |
2742 | ||
2743 | static __be32 | |
2744 | stateid_error_map(stateid_t *stateid) | |
2745 | { | |
2746 | if (STALE_STATEID(stateid)) | |
2747 | return nfserr_stale_stateid; | |
2748 | if (EXPIRED_STATEID(stateid)) | |
2749 | return nfserr_expired; | |
2750 | ||
2751 | dprintk("NFSD: bad stateid (%08x/%08x/%08x/%08x)!\n", | |
2752 | stateid->si_boot, stateid->si_stateownerid, | |
2753 | stateid->si_fileid, stateid->si_generation); | |
2754 | return nfserr_bad_stateid; | |
1da177e4 LT |
2755 | } |
2756 | ||
2757 | static inline int | |
2758 | access_permit_read(unsigned long access_bmap) | |
2759 | { | |
2760 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
2761 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
2762 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
2763 | } | |
2764 | ||
2765 | static inline int | |
2766 | access_permit_write(unsigned long access_bmap) | |
2767 | { | |
2768 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
2769 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
2770 | } | |
2771 | ||
2772 | static | |
b37ad28b | 2773 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2774 | { |
b37ad28b | 2775 | __be32 status = nfserr_openmode; |
1da177e4 LT |
2776 | |
2777 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
2778 | goto out; | |
2779 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2780 | goto out; | |
2781 | status = nfs_ok; | |
2782 | out: | |
2783 | return status; | |
2784 | } | |
2785 | ||
b37ad28b | 2786 | static inline __be32 |
1da177e4 LT |
2787 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2788 | { | |
203a8c8e | 2789 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 2790 | return nfs_ok; |
af558e33 | 2791 | else if (locks_in_grace()) { |
1da177e4 LT |
2792 | /* Answer in remaining cases depends on existance of |
2793 | * conflicting state; so we must wait out the grace period. */ | |
2794 | return nfserr_grace; | |
2795 | } else if (flags & WR_STATE) | |
2796 | return nfs4_share_conflict(current_fh, | |
2797 | NFS4_SHARE_DENY_WRITE); | |
2798 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2799 | return nfs4_share_conflict(current_fh, | |
2800 | NFS4_SHARE_DENY_READ); | |
2801 | } | |
2802 | ||
2803 | /* | |
2804 | * Allow READ/WRITE during grace period on recovered state only for files | |
2805 | * that are not able to provide mandatory locking. | |
2806 | */ | |
2807 | static inline int | |
18f82731 | 2808 | grace_disallows_io(struct inode *inode) |
1da177e4 | 2809 | { |
203a8c8e | 2810 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
2811 | } |
2812 | ||
6668958f | 2813 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 2814 | { |
6668958f AA |
2815 | /* |
2816 | * When sessions are used the stateid generation number is ignored | |
2817 | * when it is zero. | |
2818 | */ | |
2819 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
2820 | goto out; | |
2821 | ||
0836f587 BF |
2822 | /* If the client sends us a stateid from the future, it's buggy: */ |
2823 | if (in->si_generation > ref->si_generation) | |
2824 | return nfserr_bad_stateid; | |
2825 | /* | |
2826 | * The following, however, can happen. For example, if the | |
2827 | * client sends an open and some IO at the same time, the open | |
2828 | * may bump si_generation while the IO is still in flight. | |
2829 | * Thanks to hard links and renames, the client never knows what | |
2830 | * file an open will affect. So it could avoid that situation | |
2831 | * only by serializing all opens and IO from the same open | |
2832 | * owner. To recover from the old_stateid error, the client | |
2833 | * will just have to retry the IO: | |
2834 | */ | |
2835 | if (in->si_generation < ref->si_generation) | |
2836 | return nfserr_old_stateid; | |
6668958f | 2837 | out: |
0836f587 BF |
2838 | return nfs_ok; |
2839 | } | |
2840 | ||
3e633079 BF |
2841 | static int is_delegation_stateid(stateid_t *stateid) |
2842 | { | |
2843 | return stateid->si_fileid == 0; | |
2844 | } | |
2845 | ||
1da177e4 LT |
2846 | /* |
2847 | * Checks for stateid operations | |
2848 | */ | |
b37ad28b | 2849 | __be32 |
dd453dfd BH |
2850 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
2851 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
2852 | { |
2853 | struct nfs4_stateid *stp = NULL; | |
2854 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 2855 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 2856 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 2857 | __be32 status; |
1da177e4 | 2858 | |
1da177e4 LT |
2859 | if (filpp) |
2860 | *filpp = NULL; | |
2861 | ||
18f82731 | 2862 | if (grace_disallows_io(ino)) |
1da177e4 LT |
2863 | return nfserr_grace; |
2864 | ||
6668958f AA |
2865 | if (nfsd4_has_session(cstate)) |
2866 | flags |= HAS_SESSION; | |
2867 | ||
1da177e4 LT |
2868 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
2869 | return check_special_stateids(current_fh, stateid, flags); | |
2870 | ||
1da177e4 LT |
2871 | status = nfserr_stale_stateid; |
2872 | if (STALE_STATEID(stateid)) | |
2873 | goto out; | |
2874 | ||
1da177e4 | 2875 | status = nfserr_bad_stateid; |
3e633079 | 2876 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 2877 | dp = find_delegation_stateid(ino, stateid); |
78155ed7 BN |
2878 | if (!dp) { |
2879 | status = stateid_error_map(stateid); | |
1da177e4 | 2880 | goto out; |
78155ed7 | 2881 | } |
6668958f AA |
2882 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
2883 | flags); | |
0c2a498f BF |
2884 | if (status) |
2885 | goto out; | |
dc9bf700 BF |
2886 | status = nfs4_check_delegmode(dp, flags); |
2887 | if (status) | |
2888 | goto out; | |
2889 | renew_client(dp->dl_client); | |
dc9bf700 BF |
2890 | if (filpp) |
2891 | *filpp = dp->dl_vfs_file; | |
1da177e4 | 2892 | } else { /* open or lock stateid */ |
a4455be0 | 2893 | stp = find_stateid(stateid, flags); |
78155ed7 BN |
2894 | if (!stp) { |
2895 | status = stateid_error_map(stateid); | |
1da177e4 | 2896 | goto out; |
78155ed7 | 2897 | } |
6150ef0d | 2898 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
2899 | goto out; |
2900 | if (!stp->st_stateowner->so_confirmed) | |
2901 | goto out; | |
6668958f AA |
2902 | status = check_stateid_generation(stateid, &stp->st_stateid, |
2903 | flags); | |
0c2a498f BF |
2904 | if (status) |
2905 | goto out; | |
a4455be0 BF |
2906 | status = nfs4_check_openmode(stp, flags); |
2907 | if (status) | |
1da177e4 LT |
2908 | goto out; |
2909 | renew_client(stp->st_stateowner->so_client); | |
2910 | if (filpp) | |
2911 | *filpp = stp->st_vfs_file; | |
1da177e4 LT |
2912 | } |
2913 | status = nfs_ok; | |
2914 | out: | |
2915 | return status; | |
2916 | } | |
2917 | ||
4c4cd222 N |
2918 | static inline int |
2919 | setlkflg (int type) | |
2920 | { | |
2921 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2922 | RD_STATE : WR_STATE; | |
2923 | } | |
1da177e4 LT |
2924 | |
2925 | /* | |
2926 | * Checks for sequence id mutating operations. | |
2927 | */ | |
b37ad28b | 2928 | static __be32 |
dd453dfd BH |
2929 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2930 | stateid_t *stateid, int flags, | |
2931 | struct nfs4_stateowner **sopp, | |
2932 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 2933 | { |
1da177e4 LT |
2934 | struct nfs4_stateid *stp; |
2935 | struct nfs4_stateowner *sop; | |
dd453dfd | 2936 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 2937 | __be32 status; |
1da177e4 LT |
2938 | |
2939 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | |
2940 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | |
2941 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
2942 | stateid->si_generation); | |
3a4f98bb | 2943 | |
1da177e4 LT |
2944 | *stpp = NULL; |
2945 | *sopp = NULL; | |
2946 | ||
1da177e4 | 2947 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2948 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2949 | return nfserr_bad_stateid; |
1da177e4 LT |
2950 | } |
2951 | ||
1da177e4 | 2952 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2953 | return nfserr_stale_stateid; |
6668958f AA |
2954 | |
2955 | if (nfsd4_has_session(cstate)) | |
2956 | flags |= HAS_SESSION; | |
2957 | ||
1da177e4 LT |
2958 | /* |
2959 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2960 | * the confirmed flag is incorrecly set, or the generation | |
2961 | * number is incorrect. | |
1da177e4 | 2962 | */ |
f8816512 N |
2963 | stp = find_stateid(stateid, flags); |
2964 | if (stp == NULL) { | |
2965 | /* | |
2966 | * Also, we should make sure this isn't just the result of | |
2967 | * a replayed close: | |
2968 | */ | |
2969 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2970 | if (sop == NULL) | |
78155ed7 | 2971 | return stateid_error_map(stateid); |
f8816512 N |
2972 | *sopp = sop; |
2973 | goto check_replay; | |
2974 | } | |
1da177e4 | 2975 | |
39325bd0 BF |
2976 | *stpp = stp; |
2977 | *sopp = sop = stp->st_stateowner; | |
2978 | ||
4c4cd222 | 2979 | if (lock) { |
4c4cd222 | 2980 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2981 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2982 | int lkflg = 0; |
b37ad28b | 2983 | __be32 status; |
4c4cd222 N |
2984 | |
2985 | lkflg = setlkflg(lock->lk_type); | |
2986 | ||
2987 | if (lock->lk_is_new) { | |
599e0a22 BF |
2988 | if (!sop->so_is_open_owner) |
2989 | return nfserr_bad_stateid; | |
60adfc50 AA |
2990 | if (!(flags & HAS_SESSION) && |
2991 | !same_clid(&clp->cl_clientid, lockclid)) | |
2992 | return nfserr_bad_stateid; | |
599e0a22 BF |
2993 | /* stp is the open stateid */ |
2994 | status = nfs4_check_openmode(stp, lkflg); | |
2995 | if (status) | |
2996 | return status; | |
2997 | } else { | |
2998 | /* stp is the lock stateid */ | |
2999 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
3000 | if (status) | |
3001 | return status; | |
4c4cd222 | 3002 | } |
1da177e4 LT |
3003 | } |
3004 | ||
f3362737 | 3005 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 3006 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 3007 | return nfserr_bad_stateid; |
1da177e4 LT |
3008 | } |
3009 | ||
1da177e4 LT |
3010 | /* |
3011 | * We now validate the seqid and stateid generation numbers. | |
3012 | * For the moment, we ignore the possibility of | |
3013 | * generation number wraparound. | |
3014 | */ | |
6668958f | 3015 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
3016 | goto check_replay; |
3017 | ||
3a4f98bb | 3018 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 3019 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
3020 | " unconfirmed stateowner!\n"); |
3021 | return nfserr_bad_stateid; | |
1da177e4 | 3022 | } |
3a4f98bb | 3023 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 3024 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
3025 | " confirmed yet!\n"); |
3026 | return nfserr_bad_stateid; | |
1da177e4 | 3027 | } |
6668958f | 3028 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
3029 | if (status) |
3030 | return status; | |
52fd004e | 3031 | renew_client(sop->so_client); |
3a4f98bb | 3032 | return nfs_ok; |
1da177e4 | 3033 | |
1da177e4 | 3034 | check_replay: |
bd9aac52 | 3035 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 3036 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 3037 | /* indicate replay to calling function */ |
a90b061c | 3038 | return nfserr_replay_me; |
1da177e4 | 3039 | } |
2fdada03 | 3040 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
3041 | sop->so_seqid, seqid); |
3042 | *sopp = NULL; | |
3043 | return nfserr_bad_seqid; | |
1da177e4 LT |
3044 | } |
3045 | ||
b37ad28b | 3046 | __be32 |
ca364317 | 3047 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3048 | struct nfsd4_open_confirm *oc) |
1da177e4 | 3049 | { |
b37ad28b | 3050 | __be32 status; |
1da177e4 LT |
3051 | struct nfs4_stateowner *sop; |
3052 | struct nfs4_stateid *stp; | |
3053 | ||
3054 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
3055 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3056 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3057 | |
ca364317 | 3058 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
3059 | if (status) |
3060 | return status; | |
1da177e4 LT |
3061 | |
3062 | nfs4_lock_state(); | |
3063 | ||
dd453dfd | 3064 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3065 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 3066 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
3067 | &oc->oc_stateowner, &stp, NULL))) |
3068 | goto out; | |
3069 | ||
3070 | sop = oc->oc_stateowner; | |
3071 | sop->so_confirmed = 1; | |
3072 | update_stateid(&stp->st_stateid); | |
3073 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3074 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | |
3075 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | |
3076 | stp->st_stateid.si_boot, | |
3077 | stp->st_stateid.si_stateownerid, | |
3078 | stp->st_stateid.si_fileid, | |
3079 | stp->st_stateid.si_generation); | |
c7b9a459 N |
3080 | |
3081 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 3082 | out: |
f2327d9a | 3083 | if (oc->oc_stateowner) { |
1da177e4 | 3084 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3085 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3086 | } |
1da177e4 LT |
3087 | nfs4_unlock_state(); |
3088 | return status; | |
3089 | } | |
3090 | ||
3091 | ||
3092 | /* | |
3093 | * unset all bits in union bitmap (bmap) that | |
3094 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
3095 | */ | |
3096 | static void | |
3097 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
3098 | { | |
3099 | int i; | |
3100 | for (i = 1; i < 4; i++) { | |
3101 | if ((i & access) != i) | |
3102 | __clear_bit(i, bmap); | |
3103 | } | |
3104 | } | |
3105 | ||
3106 | static void | |
3107 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3108 | { | |
3109 | int i; | |
3110 | for (i = 0; i < 4; i++) { | |
3111 | if ((i & deny) != i) | |
3112 | __clear_bit(i, bmap); | |
3113 | } | |
3114 | } | |
3115 | ||
b37ad28b | 3116 | __be32 |
ca364317 BF |
3117 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3118 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3119 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3120 | { |
b37ad28b | 3121 | __be32 status; |
1da177e4 LT |
3122 | struct nfs4_stateid *stp; |
3123 | unsigned int share_access; | |
3124 | ||
3125 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3126 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3127 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3128 | |
d87a8ade | 3129 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3130 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3131 | return nfserr_inval; |
3132 | ||
3133 | nfs4_lock_state(); | |
dd453dfd | 3134 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3135 | od->od_seqid, |
1da177e4 | 3136 | &od->od_stateid, |
f3362737 | 3137 | OPEN_STATE, |
1da177e4 LT |
3138 | &od->od_stateowner, &stp, NULL))) |
3139 | goto out; | |
3140 | ||
3141 | status = nfserr_inval; | |
3142 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3143 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3144 | stp->st_access_bmap, od->od_share_access); | |
3145 | goto out; | |
3146 | } | |
3147 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3148 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3149 | stp->st_deny_bmap, od->od_share_deny); | |
3150 | goto out; | |
3151 | } | |
3152 | set_access(&share_access, stp->st_access_bmap); | |
3153 | nfs4_file_downgrade(stp->st_vfs_file, | |
3154 | share_access & ~od->od_share_access); | |
3155 | ||
3156 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
3157 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
3158 | ||
3159 | update_stateid(&stp->st_stateid); | |
3160 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3161 | status = nfs_ok; | |
3162 | out: | |
f2327d9a | 3163 | if (od->od_stateowner) { |
1da177e4 | 3164 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3165 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3166 | } |
1da177e4 LT |
3167 | nfs4_unlock_state(); |
3168 | return status; | |
3169 | } | |
3170 | ||
3171 | /* | |
3172 | * nfs4_unlock_state() called after encode | |
3173 | */ | |
b37ad28b | 3174 | __be32 |
ca364317 | 3175 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3176 | struct nfsd4_close *close) |
1da177e4 | 3177 | { |
b37ad28b | 3178 | __be32 status; |
1da177e4 LT |
3179 | struct nfs4_stateid *stp; |
3180 | ||
3181 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3182 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3183 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3184 | |
3185 | nfs4_lock_state(); | |
3186 | /* check close_lru for replay */ | |
dd453dfd | 3187 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3188 | close->cl_seqid, |
1da177e4 | 3189 | &close->cl_stateid, |
f3362737 | 3190 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3191 | &close->cl_stateowner, &stp, NULL))) |
3192 | goto out; | |
1da177e4 LT |
3193 | status = nfs_ok; |
3194 | update_stateid(&stp->st_stateid); | |
3195 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3196 | ||
04ef5954 | 3197 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3198 | release_open_stateid(stp); |
04ef5954 BF |
3199 | |
3200 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3201 | * released by the laundromat service after the lease period | |
3202 | * to enable us to handle CLOSE replay | |
3203 | */ | |
3204 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3205 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3206 | out: |
f2327d9a | 3207 | if (close->cl_stateowner) { |
1da177e4 | 3208 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3209 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3210 | } |
1da177e4 LT |
3211 | nfs4_unlock_state(); |
3212 | return status; | |
3213 | } | |
3214 | ||
b37ad28b | 3215 | __be32 |
ca364317 BF |
3216 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3217 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3218 | { |
203a8c8e BF |
3219 | struct nfs4_delegation *dp; |
3220 | stateid_t *stateid = &dr->dr_stateid; | |
3221 | struct inode *inode; | |
b37ad28b | 3222 | __be32 status; |
6668958f | 3223 | int flags = 0; |
1da177e4 | 3224 | |
ca364317 | 3225 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3226 | return status; |
3227 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3228 | |
6668958f AA |
3229 | if (nfsd4_has_session(cstate)) |
3230 | flags |= HAS_SESSION; | |
1da177e4 | 3231 | nfs4_lock_state(); |
203a8c8e BF |
3232 | status = nfserr_bad_stateid; |
3233 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3234 | goto out; | |
3235 | status = nfserr_stale_stateid; | |
3236 | if (STALE_STATEID(stateid)) | |
3237 | goto out; | |
7e0f7cf5 | 3238 | status = nfserr_bad_stateid; |
203a8c8e BF |
3239 | if (!is_delegation_stateid(stateid)) |
3240 | goto out; | |
203a8c8e | 3241 | dp = find_delegation_stateid(inode, stateid); |
78155ed7 BN |
3242 | if (!dp) { |
3243 | status = stateid_error_map(stateid); | |
203a8c8e | 3244 | goto out; |
78155ed7 | 3245 | } |
6668958f | 3246 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3247 | if (status) |
3248 | goto out; | |
3249 | renew_client(dp->dl_client); | |
3250 | ||
3251 | unhash_delegation(dp); | |
1da177e4 | 3252 | out: |
203a8c8e BF |
3253 | nfs4_unlock_state(); |
3254 | ||
1da177e4 LT |
3255 | return status; |
3256 | } | |
3257 | ||
3258 | ||
3259 | /* | |
3260 | * Lock owner state (byte-range locks) | |
3261 | */ | |
3262 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3263 | #define LOCK_HASH_BITS 8 | |
3264 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3265 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3266 | ||
87df4de8 BH |
3267 | static inline u64 |
3268 | end_offset(u64 start, u64 len) | |
3269 | { | |
3270 | u64 end; | |
3271 | ||
3272 | end = start + len; | |
3273 | return end >= start ? end: NFS4_MAX_UINT64; | |
3274 | } | |
3275 | ||
3276 | /* last octet in a range */ | |
3277 | static inline u64 | |
3278 | last_byte_offset(u64 start, u64 len) | |
3279 | { | |
3280 | u64 end; | |
3281 | ||
3282 | BUG_ON(!len); | |
3283 | end = start + len; | |
3284 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3285 | } | |
3286 | ||
1da177e4 LT |
3287 | #define lockownerid_hashval(id) \ |
3288 | ((id) & LOCK_HASH_MASK) | |
3289 | ||
3290 | static inline unsigned int | |
3291 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3292 | struct xdr_netobj *ownername) | |
3293 | { | |
3294 | return (file_hashval(inode) + cl_id | |
3295 | + opaque_hashval(ownername->data, ownername->len)) | |
3296 | & LOCK_HASH_MASK; | |
3297 | } | |
3298 | ||
3299 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3300 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3301 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3302 | ||
fd39ca9a | 3303 | static struct nfs4_stateid * |
1da177e4 LT |
3304 | find_stateid(stateid_t *stid, int flags) |
3305 | { | |
9346eff0 | 3306 | struct nfs4_stateid *local; |
1da177e4 LT |
3307 | u32 st_id = stid->si_stateownerid; |
3308 | u32 f_id = stid->si_fileid; | |
3309 | unsigned int hashval; | |
3310 | ||
3311 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3312 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3313 | hashval = stateid_hashval(st_id, f_id); |
3314 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3315 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3316 | (local->st_stateid.si_fileid == f_id)) | |
3317 | return local; | |
3318 | } | |
3319 | } | |
9346eff0 KK |
3320 | |
3321 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3322 | hashval = stateid_hashval(st_id, f_id); |
3323 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3324 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3325 | (local->st_stateid.si_fileid == f_id)) | |
3326 | return local; | |
3327 | } | |
849823c5 | 3328 | } |
1da177e4 LT |
3329 | return NULL; |
3330 | } | |
3331 | ||
3332 | static struct nfs4_delegation * | |
3333 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3334 | { | |
13cd2184 N |
3335 | struct nfs4_file *fp; |
3336 | struct nfs4_delegation *dl; | |
1da177e4 LT |
3337 | |
3338 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | |
3339 | stid->si_boot, stid->si_stateownerid, | |
3340 | stid->si_fileid, stid->si_generation); | |
3341 | ||
1da177e4 | 3342 | fp = find_file(ino); |
13cd2184 N |
3343 | if (!fp) |
3344 | return NULL; | |
3345 | dl = find_delegation_file(fp, stid); | |
3346 | put_nfs4_file(fp); | |
3347 | return dl; | |
1da177e4 LT |
3348 | } |
3349 | ||
3350 | /* | |
3351 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3352 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3353 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3354 | * locking, this prevents us from being completely protocol-compliant. The | |
3355 | * real solution to this problem is to start using unsigned file offsets in | |
3356 | * the VFS, but this is a very deep change! | |
3357 | */ | |
3358 | static inline void | |
3359 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3360 | { | |
3361 | if (lock->fl_start < 0) | |
3362 | lock->fl_start = OFFSET_MAX; | |
3363 | if (lock->fl_end < 0) | |
3364 | lock->fl_end = OFFSET_MAX; | |
3365 | } | |
3366 | ||
d5b9026a N |
3367 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3368 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
e465a77f | 3369 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3370 | }; |
1da177e4 LT |
3371 | |
3372 | static inline void | |
3373 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3374 | { | |
d5b9026a N |
3375 | struct nfs4_stateowner *sop; |
3376 | unsigned int hval; | |
1da177e4 | 3377 | |
d5b9026a N |
3378 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3379 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
3380 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
3381 | kref_get(&sop->so_ref); |
3382 | deny->ld_sop = sop; | |
3383 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3384 | } else { |
3385 | deny->ld_sop = NULL; | |
3386 | deny->ld_clientid.cl_boot = 0; | |
3387 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3388 | } |
3389 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3390 | deny->ld_length = NFS4_MAX_UINT64; |
3391 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3392 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3393 | deny->ld_type = NFS4_READ_LT; | |
3394 | if (fl->fl_type != F_RDLCK) | |
3395 | deny->ld_type = NFS4_WRITE_LT; | |
3396 | } | |
3397 | ||
1da177e4 LT |
3398 | static struct nfs4_stateowner * |
3399 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3400 | struct xdr_netobj *owner) | |
3401 | { | |
3402 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3403 | struct nfs4_stateowner *op; | |
3404 | ||
3405 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3406 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3407 | return op; |
3408 | } | |
3409 | return NULL; | |
3410 | } | |
3411 | ||
3412 | /* | |
3413 | * Alloc a lock owner structure. | |
3414 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
3415 | * occured. | |
3416 | * | |
3417 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3418 | */ |
3419 | ||
3420 | static struct nfs4_stateowner * | |
3421 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3422 | struct nfs4_stateowner *sop; | |
3423 | struct nfs4_replay *rp; | |
3424 | unsigned int idhashval; | |
3425 | ||
3426 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3427 | return NULL; | |
3428 | idhashval = lockownerid_hashval(current_ownerid); | |
3429 | INIT_LIST_HEAD(&sop->so_idhash); | |
3430 | INIT_LIST_HEAD(&sop->so_strhash); | |
3431 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3432 | INIT_LIST_HEAD(&sop->so_stateids); |
3433 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3434 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3435 | sop->so_time = 0; | |
3436 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3437 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3438 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3439 | sop->so_is_open_owner = 0; |
3440 | sop->so_id = current_ownerid++; | |
3441 | sop->so_client = clp; | |
b59e3c0e NB |
3442 | /* It is the openowner seqid that will be incremented in encode in the |
3443 | * case of new lockowners; so increment the lock seqid manually: */ | |
3444 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3445 | sop->so_confirmed = 1; |
3446 | rp = &sop->so_replay; | |
de1ae286 | 3447 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3448 | rp->rp_buflen = 0; |
3449 | rp->rp_buf = rp->rp_ibuf; | |
3450 | return sop; | |
3451 | } | |
3452 | ||
fd39ca9a | 3453 | static struct nfs4_stateid * |
1da177e4 LT |
3454 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3455 | { | |
3456 | struct nfs4_stateid *stp; | |
3457 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3458 | ||
5ac049ac N |
3459 | stp = nfs4_alloc_stateid(); |
3460 | if (stp == NULL) | |
1da177e4 LT |
3461 | goto out; |
3462 | INIT_LIST_HEAD(&stp->st_hash); | |
3463 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3464 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3465 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3466 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3467 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3468 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3469 | stp->st_stateowner = sop; |
13cd2184 | 3470 | get_nfs4_file(fp); |
1da177e4 | 3471 | stp->st_file = fp; |
78155ed7 | 3472 | stp->st_stateid.si_boot = get_seconds(); |
1da177e4 LT |
3473 | stp->st_stateid.si_stateownerid = sop->so_id; |
3474 | stp->st_stateid.si_fileid = fp->fi_id; | |
3475 | stp->st_stateid.si_generation = 0; | |
3476 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
3477 | stp->st_access_bmap = open_stp->st_access_bmap; | |
3478 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 3479 | stp->st_openstp = open_stp; |
1da177e4 LT |
3480 | |
3481 | out: | |
3482 | return stp; | |
3483 | } | |
3484 | ||
fd39ca9a | 3485 | static int |
1da177e4 LT |
3486 | check_lock_length(u64 offset, u64 length) |
3487 | { | |
87df4de8 | 3488 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3489 | LOFF_OVERFLOW(offset, length))); |
3490 | } | |
3491 | ||
3492 | /* | |
3493 | * LOCK operation | |
3494 | */ | |
b37ad28b | 3495 | __be32 |
ca364317 | 3496 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3497 | struct nfsd4_lock *lock) |
1da177e4 | 3498 | { |
3e9e3dbe | 3499 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3500 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
3501 | struct nfs4_stateid *lock_stp; |
3502 | struct file *filp; | |
3503 | struct file_lock file_lock; | |
8dc7c311 | 3504 | struct file_lock conflock; |
b37ad28b | 3505 | __be32 status = 0; |
1da177e4 | 3506 | unsigned int strhashval; |
150b3934 | 3507 | unsigned int cmd; |
b8dd7b9a | 3508 | int err; |
1da177e4 LT |
3509 | |
3510 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3511 | (long long) lock->lk_offset, | |
3512 | (long long) lock->lk_length); | |
3513 | ||
1da177e4 LT |
3514 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3515 | return nfserr_inval; | |
3516 | ||
ca364317 | 3517 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3518 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3519 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3520 | return status; | |
3521 | } | |
3522 | ||
1da177e4 LT |
3523 | nfs4_lock_state(); |
3524 | ||
3525 | if (lock->lk_is_new) { | |
893f8770 N |
3526 | /* |
3527 | * Client indicates that this is a new lockowner. | |
3528 | * Use open owner and open stateid to create lock owner and | |
3529 | * lock stateid. | |
3530 | */ | |
1da177e4 LT |
3531 | struct nfs4_stateid *open_stp = NULL; |
3532 | struct nfs4_file *fp; | |
3533 | ||
3534 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3535 | if (!nfsd4_has_session(cstate) && |
3536 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3537 | goto out; |
1da177e4 | 3538 | |
1da177e4 | 3539 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3540 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3541 | lock->lk_new_open_seqid, |
3542 | &lock->lk_new_open_stateid, | |
f3362737 | 3543 | OPEN_STATE, |
3a65588a | 3544 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 3545 | lock); |
37515177 | 3546 | if (status) |
1da177e4 | 3547 | goto out; |
3a65588a | 3548 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
3549 | /* create lockowner and lock stateid */ |
3550 | fp = open_stp->st_file; | |
3551 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3552 | open_sop->so_client->cl_clientid.cl_id, | |
3553 | &lock->v.new.owner); | |
3e9e3dbe N |
3554 | /* XXX: Do we need to check for duplicate stateowners on |
3555 | * the same file, or should they just be allowed (and | |
3556 | * create new stateids)? */ | |
1da177e4 | 3557 | status = nfserr_resource; |
b59e3c0e NB |
3558 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3559 | open_sop->so_client, open_stp, lock); | |
3560 | if (lock_sop == NULL) | |
1da177e4 | 3561 | goto out; |
b59e3c0e | 3562 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3563 | if (lock_stp == NULL) |
1da177e4 | 3564 | goto out; |
1da177e4 LT |
3565 | } else { |
3566 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3567 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3568 | lock->lk_old_lock_seqid, |
3569 | &lock->lk_old_lock_stateid, | |
f3362737 | 3570 | LOCK_STATE, |
3a65588a | 3571 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
3572 | if (status) |
3573 | goto out; | |
3a65588a | 3574 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 3575 | } |
3a65588a | 3576 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
3577 | filp = lock_stp->st_vfs_file; |
3578 | ||
0dd395dc | 3579 | status = nfserr_grace; |
af558e33 | 3580 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3581 | goto out; |
3582 | status = nfserr_no_grace; | |
af558e33 | 3583 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3584 | goto out; |
3585 | ||
1da177e4 LT |
3586 | locks_init_lock(&file_lock); |
3587 | switch (lock->lk_type) { | |
3588 | case NFS4_READ_LT: | |
3589 | case NFS4_READW_LT: | |
3590 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 3591 | cmd = F_SETLK; |
1da177e4 LT |
3592 | break; |
3593 | case NFS4_WRITE_LT: | |
3594 | case NFS4_WRITEW_LT: | |
3595 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 3596 | cmd = F_SETLK; |
1da177e4 LT |
3597 | break; |
3598 | default: | |
3599 | status = nfserr_inval; | |
3600 | goto out; | |
3601 | } | |
b59e3c0e | 3602 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3603 | file_lock.fl_pid = current->tgid; |
3604 | file_lock.fl_file = filp; | |
3605 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3606 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3607 | |
3608 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3609 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3610 | nfs4_transform_lock_offset(&file_lock); |
3611 | ||
3612 | /* | |
3613 | * Try to lock the file in the VFS. | |
3614 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3615 | */ | |
3616 | ||
fd85b817 | 3617 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 3618 | switch (-err) { |
1da177e4 LT |
3619 | case 0: /* success! */ |
3620 | update_stateid(&lock_stp->st_stateid); | |
3621 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
3622 | sizeof(stateid_t)); | |
b8dd7b9a | 3623 | status = 0; |
eb76b3fd AA |
3624 | break; |
3625 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3626 | status = nfserr_denied; | |
3627 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3628 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3629 | break; | |
1da177e4 LT |
3630 | case (EDEADLK): |
3631 | status = nfserr_deadlock; | |
eb76b3fd | 3632 | break; |
1da177e4 | 3633 | default: |
fd85b817 | 3634 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
3635 | status = nfserr_resource; |
3636 | break; | |
1da177e4 | 3637 | } |
1da177e4 | 3638 | out: |
8a280510 | 3639 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3640 | release_lockowner(lock_sop); |
3a65588a BF |
3641 | if (lock->lk_replay_owner) { |
3642 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 3643 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 3644 | } |
1da177e4 LT |
3645 | nfs4_unlock_state(); |
3646 | return status; | |
3647 | } | |
3648 | ||
55ef1274 BF |
3649 | /* |
3650 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
3651 | * so we do a temporary open here just to get an open file to pass to | |
3652 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
3653 | * inode operation.) | |
3654 | */ | |
3655 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
3656 | { | |
3657 | struct file *file; | |
3658 | int err; | |
3659 | ||
3660 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
3661 | if (err) | |
3662 | return err; | |
3663 | err = vfs_test_lock(file, lock); | |
3664 | nfsd_close(file); | |
3665 | return err; | |
3666 | } | |
3667 | ||
1da177e4 LT |
3668 | /* |
3669 | * LOCKT operation | |
3670 | */ | |
b37ad28b | 3671 | __be32 |
ca364317 BF |
3672 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3673 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
3674 | { |
3675 | struct inode *inode; | |
1da177e4 | 3676 | struct file_lock file_lock; |
fd85b817 | 3677 | int error; |
b37ad28b | 3678 | __be32 status; |
1da177e4 | 3679 | |
af558e33 | 3680 | if (locks_in_grace()) |
1da177e4 LT |
3681 | return nfserr_grace; |
3682 | ||
3683 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
3684 | return nfserr_inval; | |
3685 | ||
3686 | lockt->lt_stateowner = NULL; | |
3687 | nfs4_lock_state(); | |
3688 | ||
3689 | status = nfserr_stale_clientid; | |
60adfc50 | 3690 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 3691 | goto out; |
1da177e4 | 3692 | |
ca364317 | 3693 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 3694 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
3695 | if (status == nfserr_symlink) |
3696 | status = nfserr_inval; | |
3697 | goto out; | |
3698 | } | |
3699 | ||
ca364317 | 3700 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
3701 | locks_init_lock(&file_lock); |
3702 | switch (lockt->lt_type) { | |
3703 | case NFS4_READ_LT: | |
3704 | case NFS4_READW_LT: | |
3705 | file_lock.fl_type = F_RDLCK; | |
3706 | break; | |
3707 | case NFS4_WRITE_LT: | |
3708 | case NFS4_WRITEW_LT: | |
3709 | file_lock.fl_type = F_WRLCK; | |
3710 | break; | |
3711 | default: | |
2fdada03 | 3712 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
3713 | status = nfserr_inval; |
3714 | goto out; | |
3715 | } | |
3716 | ||
3717 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
3718 | &lockt->lt_clientid, &lockt->lt_owner); | |
3719 | if (lockt->lt_stateowner) | |
3720 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
3721 | file_lock.fl_pid = current->tgid; | |
3722 | file_lock.fl_flags = FL_POSIX; | |
3723 | ||
3724 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 3725 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
3726 | |
3727 | nfs4_transform_lock_offset(&file_lock); | |
3728 | ||
1da177e4 | 3729 | status = nfs_ok; |
55ef1274 | 3730 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
3731 | if (error) { |
3732 | status = nfserrno(error); | |
3733 | goto out; | |
3734 | } | |
9d6a8c5c | 3735 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 3736 | status = nfserr_denied; |
9d6a8c5c | 3737 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
3738 | } |
3739 | out: | |
3740 | nfs4_unlock_state(); | |
3741 | return status; | |
3742 | } | |
3743 | ||
b37ad28b | 3744 | __be32 |
ca364317 | 3745 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3746 | struct nfsd4_locku *locku) |
1da177e4 LT |
3747 | { |
3748 | struct nfs4_stateid *stp; | |
3749 | struct file *filp = NULL; | |
3750 | struct file_lock file_lock; | |
b37ad28b | 3751 | __be32 status; |
b8dd7b9a | 3752 | int err; |
1da177e4 LT |
3753 | |
3754 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
3755 | (long long) locku->lu_offset, | |
3756 | (long long) locku->lu_length); | |
3757 | ||
3758 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
3759 | return nfserr_inval; | |
3760 | ||
3761 | nfs4_lock_state(); | |
3762 | ||
dd453dfd | 3763 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3764 | locku->lu_seqid, |
3765 | &locku->lu_stateid, | |
f3362737 | 3766 | LOCK_STATE, |
1da177e4 LT |
3767 | &locku->lu_stateowner, &stp, NULL))) |
3768 | goto out; | |
3769 | ||
3770 | filp = stp->st_vfs_file; | |
3771 | BUG_ON(!filp); | |
3772 | locks_init_lock(&file_lock); | |
3773 | file_lock.fl_type = F_UNLCK; | |
3774 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
3775 | file_lock.fl_pid = current->tgid; | |
3776 | file_lock.fl_file = filp; | |
3777 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3778 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3779 | file_lock.fl_start = locku->lu_offset; |
3780 | ||
87df4de8 | 3781 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
3782 | nfs4_transform_lock_offset(&file_lock); |
3783 | ||
3784 | /* | |
3785 | * Try to unlock the file in the VFS. | |
3786 | */ | |
fd85b817 | 3787 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 3788 | if (err) { |
fd85b817 | 3789 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
3790 | goto out_nfserr; |
3791 | } | |
3792 | /* | |
3793 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
3794 | */ | |
3795 | update_stateid(&stp->st_stateid); | |
3796 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3797 | ||
3798 | out: | |
f2327d9a | 3799 | if (locku->lu_stateowner) { |
1da177e4 | 3800 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 3801 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 3802 | } |
1da177e4 LT |
3803 | nfs4_unlock_state(); |
3804 | return status; | |
3805 | ||
3806 | out_nfserr: | |
b8dd7b9a | 3807 | status = nfserrno(err); |
1da177e4 LT |
3808 | goto out; |
3809 | } | |
3810 | ||
3811 | /* | |
3812 | * returns | |
3813 | * 1: locks held by lockowner | |
3814 | * 0: no locks held by lockowner | |
3815 | */ | |
3816 | static int | |
3817 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
3818 | { | |
3819 | struct file_lock **flpp; | |
7eaa36e2 | 3820 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
3821 | int status = 0; |
3822 | ||
3823 | lock_kernel(); | |
3824 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 3825 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
3826 | status = 1; |
3827 | goto out; | |
796dadfd | 3828 | } |
1da177e4 LT |
3829 | } |
3830 | out: | |
3831 | unlock_kernel(); | |
3832 | return status; | |
3833 | } | |
3834 | ||
b37ad28b | 3835 | __be32 |
b591480b BF |
3836 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
3837 | struct nfsd4_compound_state *cstate, | |
3838 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
3839 | { |
3840 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
3841 | struct nfs4_stateowner *sop; |
3842 | struct nfs4_stateid *stp; | |
1da177e4 | 3843 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3844 | struct list_head matches; |
3845 | int i; | |
b37ad28b | 3846 | __be32 status; |
1da177e4 LT |
3847 | |
3848 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3849 | clid->cl_boot, clid->cl_id); | |
3850 | ||
3851 | /* XXX check for lease expiration */ | |
3852 | ||
3853 | status = nfserr_stale_clientid; | |
849823c5 | 3854 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3855 | return status; |
1da177e4 LT |
3856 | |
3857 | nfs4_lock_state(); | |
3858 | ||
3e9e3dbe N |
3859 | status = nfserr_locks_held; |
3860 | /* XXX: we're doing a linear search through all the lockowners. | |
3861 | * Yipes! For now we'll just hope clients aren't really using | |
3862 | * release_lockowner much, but eventually we have to fix these | |
3863 | * data structures. */ | |
3864 | INIT_LIST_HEAD(&matches); | |
3865 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3866 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 3867 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3868 | continue; |
3869 | list_for_each_entry(stp, &sop->so_stateids, | |
3870 | st_perstateowner) { | |
3871 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3872 | goto out; | |
3873 | /* Note: so_perclient unused for lockowners, | |
3874 | * so it's OK to fool with here. */ | |
3875 | list_add(&sop->so_perclient, &matches); | |
3876 | } | |
1da177e4 | 3877 | } |
3e9e3dbe N |
3878 | } |
3879 | /* Clients probably won't expect us to return with some (but not all) | |
3880 | * of the lockowner state released; so don't release any until all | |
3881 | * have been checked. */ | |
3882 | status = nfs_ok; | |
0fa822e4 N |
3883 | while (!list_empty(&matches)) { |
3884 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3885 | so_perclient); | |
3886 | /* unhash_stateowner deletes so_perclient only | |
3887 | * for openowners. */ | |
3888 | list_del(&sop->so_perclient); | |
f044ff83 | 3889 | release_lockowner(sop); |
1da177e4 LT |
3890 | } |
3891 | out: | |
3892 | nfs4_unlock_state(); | |
3893 | return status; | |
3894 | } | |
3895 | ||
3896 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3897 | alloc_reclaim(void) |
1da177e4 | 3898 | { |
a55370a3 | 3899 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3900 | } |
3901 | ||
c7b9a459 | 3902 | int |
a1bcecd2 | 3903 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
3904 | { |
3905 | unsigned int strhashval = clientstr_hashval(name); | |
3906 | struct nfs4_client *clp; | |
3907 | ||
a1bcecd2 | 3908 | clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); |
c7b9a459 N |
3909 | return clp ? 1 : 0; |
3910 | } | |
3911 | ||
1da177e4 LT |
3912 | /* |
3913 | * failure => all reset bets are off, nfserr_no_grace... | |
3914 | */ | |
190e4fbf N |
3915 | int |
3916 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3917 | { |
3918 | unsigned int strhashval; | |
3919 | struct nfs4_client_reclaim *crp = NULL; | |
3920 | ||
a55370a3 N |
3921 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3922 | crp = alloc_reclaim(); | |
1da177e4 LT |
3923 | if (!crp) |
3924 | return 0; | |
a55370a3 | 3925 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3926 | INIT_LIST_HEAD(&crp->cr_strhash); |
3927 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3928 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3929 | reclaim_str_hashtbl_size++; |
3930 | return 1; | |
3931 | } | |
3932 | ||
3933 | static void | |
3934 | nfs4_release_reclaim(void) | |
3935 | { | |
3936 | struct nfs4_client_reclaim *crp = NULL; | |
3937 | int i; | |
3938 | ||
1da177e4 LT |
3939 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3940 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3941 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3942 | struct nfs4_client_reclaim, cr_strhash); | |
3943 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3944 | kfree(crp); |
3945 | reclaim_str_hashtbl_size--; | |
3946 | } | |
3947 | } | |
3948 | BUG_ON(reclaim_str_hashtbl_size); | |
3949 | } | |
3950 | ||
3951 | /* | |
3952 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3953 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3954 | nfs4_find_reclaim_client(clientid_t *clid) |
3955 | { | |
3956 | unsigned int strhashval; | |
3957 | struct nfs4_client *clp; | |
3958 | struct nfs4_client_reclaim *crp = NULL; | |
3959 | ||
3960 | ||
3961 | /* find clientid in conf_id_hashtbl */ | |
3962 | clp = find_confirmed_client(clid); | |
3963 | if (clp == NULL) | |
3964 | return NULL; | |
3965 | ||
a55370a3 N |
3966 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3967 | clp->cl_name.len, clp->cl_name.data, | |
3968 | clp->cl_recdir); | |
1da177e4 LT |
3969 | |
3970 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3971 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3972 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3973 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3974 | return crp; |
3975 | } | |
3976 | } | |
3977 | return NULL; | |
3978 | } | |
3979 | ||
3980 | /* | |
3981 | * Called from OPEN. Look for clientid in reclaim list. | |
3982 | */ | |
b37ad28b | 3983 | __be32 |
1da177e4 LT |
3984 | nfs4_check_open_reclaim(clientid_t *clid) |
3985 | { | |
dfc83565 | 3986 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3987 | } |
3988 | ||
ac4d8ff2 | 3989 | /* initialization to perform at module load time: */ |
1da177e4 | 3990 | |
e8ff2a84 | 3991 | int |
ac4d8ff2 | 3992 | nfs4_state_init(void) |
1da177e4 | 3993 | { |
e8ff2a84 | 3994 | int i, status; |
1da177e4 | 3995 | |
e8ff2a84 BF |
3996 | status = nfsd4_init_slabs(); |
3997 | if (status) | |
3998 | return status; | |
1da177e4 LT |
3999 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4000 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
4001 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
4002 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
4003 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 4004 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 4005 | } |
5282fd72 ME |
4006 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
4007 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
4008 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
4009 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
4010 | } | |
4011 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
4012 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
4013 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
4014 | } | |
4015 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
4016 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
4017 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
4018 | } | |
4019 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
4020 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
4021 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
4022 | } | |
1da177e4 | 4023 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
4024 | INIT_LIST_HEAD(&close_lru); |
4025 | INIT_LIST_HEAD(&client_lru); | |
4026 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 4027 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 4028 | return 0; |
ac4d8ff2 N |
4029 | } |
4030 | ||
190e4fbf N |
4031 | static void |
4032 | nfsd4_load_reboot_recovery_data(void) | |
4033 | { | |
4034 | int status; | |
4035 | ||
0964a3d3 N |
4036 | nfs4_lock_state(); |
4037 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 4038 | status = nfsd4_recdir_load(); |
0964a3d3 | 4039 | nfs4_unlock_state(); |
190e4fbf N |
4040 | if (status) |
4041 | printk("NFSD: Failure reading reboot recovery data\n"); | |
4042 | } | |
4043 | ||
9a8db97e ME |
4044 | unsigned long |
4045 | get_nfs4_grace_period(void) | |
4046 | { | |
4047 | return max(user_lease_time, lease_time) * HZ; | |
4048 | } | |
4049 | ||
c2f1a551 MS |
4050 | /* |
4051 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
4052 | * client may quite reasonably hang on to a delegation as long as it has | |
4053 | * the inode cached. This becomes an obvious problem the first time a | |
4054 | * client's inode cache approaches the size of the server's total memory. | |
4055 | * | |
4056 | * For now we avoid this problem by imposing a hard limit on the number | |
4057 | * of delegations, which varies according to the server's memory size. | |
4058 | */ | |
4059 | static void | |
4060 | set_max_delegations(void) | |
4061 | { | |
4062 | /* | |
4063 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
4064 | * estimates suggest that in the worst case (where every delegation | |
4065 | * is for a different inode), a delegation could take about 1.5K, | |
4066 | * giving a worst case usage of about 6% of memory. | |
4067 | */ | |
4068 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
4069 | } | |
4070 | ||
ac4d8ff2 N |
4071 | /* initialization to perform when the nfsd service is started: */ |
4072 | ||
4073 | static void | |
4074 | __nfs4_state_start(void) | |
4075 | { | |
9a8db97e | 4076 | unsigned long grace_time; |
ac4d8ff2 | 4077 | |
1da177e4 | 4078 | boot_time = get_seconds(); |
af558e33 | 4079 | grace_time = get_nfs4_grace_period(); |
d99a05ad | 4080 | lease_time = user_lease_time; |
af558e33 | 4081 | locks_start_grace(&nfsd4_manager); |
9a8db97e ME |
4082 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
4083 | grace_time/HZ); | |
58da282b | 4084 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
9a8db97e | 4085 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
c2f1a551 | 4086 | set_max_delegations(); |
1da177e4 LT |
4087 | } |
4088 | ||
e8ff2a84 | 4089 | void |
76a3550e | 4090 | nfs4_state_start(void) |
1da177e4 | 4091 | { |
1da177e4 | 4092 | if (nfs4_init) |
e8ff2a84 | 4093 | return; |
190e4fbf | 4094 | nfsd4_load_reboot_recovery_data(); |
76a3550e | 4095 | __nfs4_state_start(); |
1da177e4 | 4096 | nfs4_init = 1; |
e8ff2a84 | 4097 | return; |
1da177e4 LT |
4098 | } |
4099 | ||
1da177e4 LT |
4100 | time_t |
4101 | nfs4_lease_time(void) | |
4102 | { | |
4103 | return lease_time; | |
4104 | } | |
4105 | ||
4106 | static void | |
4107 | __nfs4_state_shutdown(void) | |
4108 | { | |
4109 | int i; | |
4110 | struct nfs4_client *clp = NULL; | |
4111 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4112 | struct list_head *pos, *next, reaplist; |
4113 | ||
1da177e4 LT |
4114 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4115 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4116 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4117 | expire_client(clp); | |
4118 | } | |
4119 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4120 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4121 | expire_client(clp); | |
4122 | } | |
4123 | } | |
4124 | INIT_LIST_HEAD(&reaplist); | |
4125 | spin_lock(&recall_lock); | |
4126 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4127 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4128 | list_move(&dp->dl_recall_lru, &reaplist); | |
4129 | } | |
4130 | spin_unlock(&recall_lock); | |
4131 | list_for_each_safe(pos, next, &reaplist) { | |
4132 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4133 | list_del_init(&dp->dl_recall_lru); | |
4134 | unhash_delegation(dp); | |
4135 | } | |
4136 | ||
190e4fbf | 4137 | nfsd4_shutdown_recdir(); |
1da177e4 | 4138 | nfs4_init = 0; |
1da177e4 LT |
4139 | } |
4140 | ||
4141 | void | |
4142 | nfs4_state_shutdown(void) | |
4143 | { | |
5e8d5c29 N |
4144 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
4145 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 4146 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4147 | nfs4_lock_state(); |
4148 | nfs4_release_reclaim(); | |
4149 | __nfs4_state_shutdown(); | |
1da177e4 LT |
4150 | nfs4_unlock_state(); |
4151 | } | |
4152 | ||
3dd98a3b JL |
4153 | /* |
4154 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4155 | * accessed when nfsd is starting. | |
4156 | */ | |
0964a3d3 N |
4157 | static void |
4158 | nfs4_set_recdir(char *recdir) | |
4159 | { | |
0964a3d3 | 4160 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4161 | } |
4162 | ||
4163 | /* | |
4164 | * Change the NFSv4 recovery directory to recdir. | |
4165 | */ | |
4166 | int | |
4167 | nfs4_reset_recoverydir(char *recdir) | |
4168 | { | |
4169 | int status; | |
a63bb996 | 4170 | struct path path; |
0964a3d3 | 4171 | |
a63bb996 | 4172 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4173 | if (status) |
4174 | return status; | |
4175 | status = -ENOTDIR; | |
a63bb996 | 4176 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4177 | nfs4_set_recdir(recdir); |
4178 | status = 0; | |
4179 | } | |
a63bb996 | 4180 | path_put(&path); |
0964a3d3 N |
4181 | return status; |
4182 | } | |
4183 | ||
3dd98a3b JL |
4184 | char * |
4185 | nfs4_recoverydir(void) | |
4186 | { | |
4187 | return user_recovery_dirname; | |
4188 | } | |
4189 | ||
1da177e4 LT |
4190 | /* |
4191 | * Called when leasetime is changed. | |
4192 | * | |
d99a05ad N |
4193 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
4194 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
4195 | * we start to register any changes in lease time. If the administrator | |
4196 | * really wants to change the lease time *now*, they can go ahead and bring | |
4197 | * nfsd down and then back up again after changing the lease time. | |
3dd98a3b JL |
4198 | * |
4199 | * user_lease_time is protected by nfsd_mutex since it's only really accessed | |
4200 | * when nfsd is starting | |
1da177e4 LT |
4201 | */ |
4202 | void | |
4203 | nfs4_reset_lease(time_t leasetime) | |
4204 | { | |
d99a05ad | 4205 | user_lease_time = leasetime; |
1da177e4 | 4206 | } |