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CommitLineData
1da177e4
LT
1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
101070ca 54#include "internal.h"
006ea73e 55#include "iostat.h"
1da177e4
LT
56
57#define NFSDBG_FACILITY NFSDBG_PROC
58
2066fe89 59#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT
60#define NFS4_POLL_RETRY_MAX (15*HZ)
61
cdd4e68b 62struct nfs4_opendata;
864472e9 63static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 64static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 65static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM
66static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
67static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 68
1da177e4 69/* Prevent leaks of NFSv4 errors into userland */
46f72f57 70static int nfs4_map_errors(int err)
1da177e4
LT
71{
72 if (err < -1000) {
73 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 74 __func__, -err);
1da177e4
LT
75 return -EIO;
76 }
77 return err;
78}
79
80/*
81 * This is our standard bitmap for GETATTR requests.
82 */
83const u32 nfs4_fattr_bitmap[2] = {
84 FATTR4_WORD0_TYPE
85 | FATTR4_WORD0_CHANGE
86 | FATTR4_WORD0_SIZE
87 | FATTR4_WORD0_FSID
88 | FATTR4_WORD0_FILEID,
89 FATTR4_WORD1_MODE
90 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER
92 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_RAWDEV
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
98};
99
100const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
107};
108
4ce79717 109const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT
110 FATTR4_WORD0_MAXLINK
111 | FATTR4_WORD0_MAXNAME,
112 0
113};
114
115const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
119 0
120};
121
830b8e33
MN
122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
139};
140
bc4785cd 141static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT
142 struct nfs4_readdir_arg *readdir)
143{
0dbb4c67 144 __be32 *start, *p;
1da177e4
LT
145
146 BUG_ON(readdir->count < 80);
147 if (cookie > 2) {
b7ef1956 148 readdir->cookie = cookie;
1da177e4
LT
149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
150 return;
151 }
152
153 readdir->cookie = 0;
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
155 if (cookie == 2)
156 return;
157
158 /*
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
163 * instead of 1 or 2.
164 */
0dbb4c67 165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT
166
167 if (cookie == 0) {
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
173 p++;
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
4e769b93 177 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT
178 }
179
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
185 p++;
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
4e769b93 189 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT
190
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
194}
195
65de872e
TM
196static int nfs4_wait_bit_killable(void *word)
197{
198 if (fatal_signal_pending(current))
199 return -ERESTARTSYS;
200 schedule();
201 return 0;
202}
203
204static int nfs4_wait_clnt_recover(struct nfs_client *clp)
205{
206 int res;
207
208 might_sleep();
209
e005e804 210 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
65de872e 211 nfs4_wait_bit_killable, TASK_KILLABLE);
65de872e
TM
212 return res;
213}
214
215static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
216{
217 int res = 0;
218
219 might_sleep();
220
221 if (*timeout <= 0)
222 *timeout = NFS4_POLL_RETRY_MIN;
223 if (*timeout > NFS4_POLL_RETRY_MAX)
224 *timeout = NFS4_POLL_RETRY_MAX;
225 schedule_timeout_killable(*timeout);
226 if (fatal_signal_pending(current))
227 res = -ERESTARTSYS;
228 *timeout <<= 1;
229 return res;
230}
231
232/* This is the error handling routine for processes that are allowed
233 * to sleep.
234 */
235static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
236{
237 struct nfs_client *clp = server->nfs_client;
9e33bed5 238 struct nfs4_state *state = exception->state;
65de872e
TM
239 int ret = errorcode;
240
241 exception->retry = 0;
242 switch(errorcode) {
243 case 0:
244 return 0;
9e33bed5
TM
245 case -NFS4ERR_ADMIN_REVOKED:
246 case -NFS4ERR_BAD_STATEID:
247 case -NFS4ERR_OPENMODE:
248 if (state == NULL)
249 break;
250 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM
251 case -NFS4ERR_STALE_CLIENTID:
252 case -NFS4ERR_STALE_STATEID:
253 case -NFS4ERR_EXPIRED:
254 nfs4_schedule_state_recovery(clp);
255 ret = nfs4_wait_clnt_recover(clp);
256 if (ret == 0)
257 exception->retry = 1;
258 break;
259 case -NFS4ERR_FILE_OPEN:
260 case -NFS4ERR_GRACE:
261 case -NFS4ERR_DELAY:
262 ret = nfs4_delay(server->client, &exception->timeout);
263 if (ret != 0)
264 break;
265 case -NFS4ERR_OLD_STATEID:
266 exception->retry = 1;
267 }
268 /* We failed to handle the error */
269 return nfs4_map_errors(ret);
270}
271
272
26e976a8 273static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 274{
7539bbab 275 struct nfs_client *clp = server->nfs_client;
1da177e4
LT
276 spin_lock(&clp->cl_lock);
277 if (time_before(clp->cl_last_renewal,timestamp))
278 clp->cl_last_renewal = timestamp;
279 spin_unlock(&clp->cl_lock);
280}
281
38478b24 282static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 283{
38478b24 284 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 285
38478b24 286 spin_lock(&dir->i_lock);
40d24704
TM
287 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
288 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 289 nfs_force_lookup_revalidate(dir);
40d24704 290 nfsi->change_attr = cinfo->after;
38478b24 291 spin_unlock(&dir->i_lock);
1da177e4
LT
292}
293
e56e0b78 294struct nfs4_opendata {
c6d00e63 295 struct kref kref;
e56e0b78
TM
296 struct nfs_openargs o_arg;
297 struct nfs_openres o_res;
cdd4e68b
TM
298 struct nfs_open_confirmargs c_arg;
299 struct nfs_open_confirmres c_res;
e56e0b78
TM
300 struct nfs_fattr f_attr;
301 struct nfs_fattr dir_attr;
ad389da7 302 struct path path;
e56e0b78
TM
303 struct dentry *dir;
304 struct nfs4_state_owner *owner;
aac00a8d 305 struct nfs4_state *state;
e56e0b78 306 struct iattr attrs;
26e976a8 307 unsigned long timestamp;
3e309914 308 unsigned int rpc_done : 1;
24ac23ab
TM
309 int rpc_status;
310 int cancelled;
e56e0b78
TM
311};
312
2ced46c2
TM
313
314static void nfs4_init_opendata_res(struct nfs4_opendata *p)
315{
316 p->o_res.f_attr = &p->f_attr;
317 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM
318 p->o_res.seqid = p->o_arg.seqid;
319 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM
320 p->o_res.server = p->o_arg.server;
321 nfs_fattr_init(&p->f_attr);
322 nfs_fattr_init(&p->dir_attr);
323}
324
ad389da7 325static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 326 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM
327 const struct iattr *attrs)
328{
ad389da7 329 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM
330 struct inode *dir = parent->d_inode;
331 struct nfs_server *server = NFS_SERVER(dir);
332 struct nfs4_opendata *p;
333
334 p = kzalloc(sizeof(*p), GFP_KERNEL);
335 if (p == NULL)
336 goto err;
337 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
338 if (p->o_arg.seqid == NULL)
339 goto err_free;
ad389da7
TM
340 p->path.mnt = mntget(path->mnt);
341 p->path.dentry = dget(path->dentry);
e56e0b78
TM
342 p->dir = parent;
343 p->owner = sp;
344 atomic_inc(&sp->so_count);
345 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM
346 p->o_arg.open_flags = flags;
347 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 348 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 349 p->o_arg.id = sp->so_owner_id.id;
ad389da7 350 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM
351 p->o_arg.server = server;
352 p->o_arg.bitmask = server->attr_bitmask;
353 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM
354 if (flags & O_EXCL) {
355 u32 *s = (u32 *) p->o_arg.u.verifier.data;
356 s[0] = jiffies;
357 s[1] = current->pid;
358 } else if (flags & O_CREAT) {
359 p->o_arg.u.attrs = &p->attrs;
360 memcpy(&p->attrs, attrs, sizeof(p->attrs));
361 }
cdd4e68b
TM
362 p->c_arg.fh = &p->o_res.fh;
363 p->c_arg.stateid = &p->o_res.stateid;
364 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 365 nfs4_init_opendata_res(p);
c6d00e63 366 kref_init(&p->kref);
e56e0b78
TM
367 return p;
368err_free:
369 kfree(p);
370err:
371 dput(parent);
372 return NULL;
373}
374
c6d00e63 375static void nfs4_opendata_free(struct kref *kref)
e56e0b78 376{
c6d00e63
TM
377 struct nfs4_opendata *p = container_of(kref,
378 struct nfs4_opendata, kref);
379
380 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM
381 if (p->state != NULL)
382 nfs4_put_open_state(p->state);
c6d00e63
TM
383 nfs4_put_state_owner(p->owner);
384 dput(p->dir);
31f31db1 385 path_put(&p->path);
c6d00e63
TM
386 kfree(p);
387}
388
389static void nfs4_opendata_put(struct nfs4_opendata *p)
390{
391 if (p != NULL)
392 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM
393}
394
06f814a3
TM
395static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
396{
06f814a3
TM
397 int ret;
398
06f814a3 399 ret = rpc_wait_for_completion_task(task);
06f814a3
TM
400 return ret;
401}
402
dc0b027d 403static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM
404{
405 int ret = 0;
dc0b027d
TM
406
407 if (open_mode & O_EXCL)
408 goto out;
409 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM
410 case FMODE_READ:
411 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM
412 break;
413 case FMODE_WRITE:
414 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM
415 break;
416 case FMODE_READ|FMODE_WRITE:
417 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
418 }
dc0b027d 419out:
6ee41268
TM
420 return ret;
421}
422
dc0b027d 423static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 424{
dc0b027d 425 if ((delegation->type & fmode) != fmode)
aac00a8d 426 return 0;
15c831bf 427 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 428 return 0;
b7391f44 429 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM
430 return 1;
431}
432
dc0b027d 433static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 434{
dc0b027d 435 switch (fmode) {
e7616923
TM
436 case FMODE_WRITE:
437 state->n_wronly++;
438 break;
439 case FMODE_READ:
440 state->n_rdonly++;
441 break;
442 case FMODE_READ|FMODE_WRITE:
443 state->n_rdwr++;
444 }
dc0b027d 445 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM
446}
447
dc0b027d 448static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM
449{
450 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
451 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
452 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 453 switch (fmode) {
003707c7
TM
454 case FMODE_READ:
455 set_bit(NFS_O_RDONLY_STATE, &state->flags);
456 break;
457 case FMODE_WRITE:
458 set_bit(NFS_O_WRONLY_STATE, &state->flags);
459 break;
460 case FMODE_READ|FMODE_WRITE:
461 set_bit(NFS_O_RDWR_STATE, &state->flags);
462 }
e7616923
TM
463}
464
dc0b027d 465static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 466{
8bda4e4c 467 write_seqlock(&state->seqlock);
dc0b027d 468 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 469 write_sequnlock(&state->seqlock);
003707c7
TM
470}
471
dc0b027d 472static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 473{
8bda4e4c
TM
474 /*
475 * Protect the call to nfs4_state_set_mode_locked and
476 * serialise the stateid update
477 */
478 write_seqlock(&state->seqlock);
003707c7
TM
479 if (deleg_stateid != NULL) {
480 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
481 set_bit(NFS_DELEGATED_STATE, &state->flags);
482 }
483 if (open_stateid != NULL)
dc0b027d 484 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM
485 write_sequnlock(&state->seqlock);
486 spin_lock(&state->owner->so_lock);
dc0b027d 487 update_open_stateflags(state, fmode);
ec073428 488 spin_unlock(&state->owner->so_lock);
1da177e4
LT
489}
490
dc0b027d 491static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM
492{
493 struct nfs_inode *nfsi = NFS_I(state->inode);
494 struct nfs_delegation *deleg_cur;
495 int ret = 0;
496
dc0b027d 497 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM
498
499 rcu_read_lock();
500 deleg_cur = rcu_dereference(nfsi->delegation);
501 if (deleg_cur == NULL)
502 goto no_delegation;
503
504 spin_lock(&deleg_cur->lock);
505 if (nfsi->delegation != deleg_cur ||
dc0b027d 506 (deleg_cur->type & fmode) != fmode)
34310430
TM
507 goto no_delegation_unlock;
508
509 if (delegation == NULL)
510 delegation = &deleg_cur->stateid;
511 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
512 goto no_delegation_unlock;
513
b7391f44 514 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 515 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM
516 ret = 1;
517no_delegation_unlock:
518 spin_unlock(&deleg_cur->lock);
519no_delegation:
520 rcu_read_unlock();
521
522 if (!ret && open_stateid != NULL) {
dc0b027d 523 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM
524 ret = 1;
525 }
526
527 return ret;
528}
529
530
dc0b027d 531static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM
532{
533 struct nfs_delegation *delegation;
534
535 rcu_read_lock();
536 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 537 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM
538 rcu_read_unlock();
539 return;
540 }
541 rcu_read_unlock();
542 nfs_inode_return_delegation(inode);
543}
544
6ee41268 545static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM
546{
547 struct nfs4_state *state = opendata->state;
548 struct nfs_inode *nfsi = NFS_I(state->inode);
549 struct nfs_delegation *delegation;
dc0b027d
TM
550 int open_mode = opendata->o_arg.open_flags & O_EXCL;
551 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM
552 nfs4_stateid stateid;
553 int ret = -EAGAIN;
554
aac00a8d 555 for (;;) {
dc0b027d 556 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 557 spin_lock(&state->owner->so_lock);
dc0b027d
TM
558 if (can_open_cached(state, fmode, open_mode)) {
559 update_open_stateflags(state, fmode);
6ee41268 560 spin_unlock(&state->owner->so_lock);
6ee41268
TM
561 goto out_return_state;
562 }
563 spin_unlock(&state->owner->so_lock);
564 }
34310430
TM
565 rcu_read_lock();
566 delegation = rcu_dereference(nfsi->delegation);
567 if (delegation == NULL ||
dc0b027d 568 !can_open_delegated(delegation, fmode)) {
34310430 569 rcu_read_unlock();
aac00a8d 570 break;
34310430 571 }
aac00a8d
TM
572 /* Save the delegation */
573 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
574 rcu_read_unlock();
af22f94a 575 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM
576 if (ret != 0)
577 goto out;
578 ret = -EAGAIN;
34310430
TM
579
580 /* Try to update the stateid using the delegation */
dc0b027d 581 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 582 goto out_return_state;
aac00a8d 583 }
aac00a8d
TM
584out:
585 return ERR_PTR(ret);
586out_return_state:
587 atomic_inc(&state->count);
588 return state;
589}
590
24ac23ab
TM
591static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
592{
593 struct inode *inode;
594 struct nfs4_state *state = NULL;
003707c7 595 struct nfs_delegation *delegation;
1b370bc2 596 int ret;
24ac23ab 597
aac00a8d 598 if (!data->rpc_done) {
6ee41268 599 state = nfs4_try_open_cached(data);
aac00a8d
TM
600 goto out;
601 }
602
1b370bc2 603 ret = -EAGAIN;
24ac23ab 604 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 605 goto err;
24ac23ab 606 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 607 ret = PTR_ERR(inode);
03f28e3a 608 if (IS_ERR(inode))
1b370bc2
TM
609 goto err;
610 ret = -ENOMEM;
24ac23ab
TM
611 state = nfs4_get_open_state(inode, data->owner);
612 if (state == NULL)
1b370bc2 613 goto err_put_inode;
549d6ed5 614 if (data->o_res.delegation_type != 0) {
549d6ed5
TM
615 int delegation_flags = 0;
616
003707c7
TM
617 rcu_read_lock();
618 delegation = rcu_dereference(NFS_I(inode)->delegation);
619 if (delegation)
620 delegation_flags = delegation->flags;
621 rcu_read_unlock();
15c831bf 622 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM
623 nfs_inode_set_delegation(state->inode,
624 data->owner->so_cred,
625 &data->o_res);
626 else
627 nfs_inode_reclaim_delegation(state->inode,
628 data->owner->so_cred,
629 &data->o_res);
630 }
34310430
TM
631
632 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 633 data->o_arg.fmode);
24ac23ab 634 iput(inode);
aac00a8d 635out:
24ac23ab 636 return state;
1b370bc2
TM
637err_put_inode:
638 iput(inode);
639err:
640 return ERR_PTR(ret);
24ac23ab
TM
641}
642
864472e9
TM
643static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
644{
645 struct nfs_inode *nfsi = NFS_I(state->inode);
646 struct nfs_open_context *ctx;
647
648 spin_lock(&state->inode->i_lock);
649 list_for_each_entry(ctx, &nfsi->open_files, list) {
650 if (ctx->state != state)
651 continue;
652 get_nfs_open_context(ctx);
653 spin_unlock(&state->inode->i_lock);
654 return ctx;
655 }
656 spin_unlock(&state->inode->i_lock);
657 return ERR_PTR(-ENOENT);
658}
659
6f220ed5
TM
660static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
661{
662 struct nfs4_opendata *opendata;
663
dc0b027d 664 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM
665 if (opendata == NULL)
666 return ERR_PTR(-ENOMEM);
667 opendata->state = state;
668 atomic_inc(&state->count);
669 return opendata;
670}
671
dc0b027d 672static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 673{
2ced46c2 674 struct nfs4_state *newstate;
864472e9
TM
675 int ret;
676
dc0b027d
TM
677 opendata->o_arg.open_flags = 0;
678 opendata->o_arg.fmode = fmode;
2ced46c2
TM
679 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
680 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
681 nfs4_init_opendata_res(opendata);
864472e9
TM
682 ret = _nfs4_proc_open(opendata);
683 if (ret != 0)
684 return ret;
2ced46c2 685 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM
686 if (IS_ERR(newstate))
687 return PTR_ERR(newstate);
dc0b027d 688 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 689 *res = newstate;
864472e9
TM
690 return 0;
691}
692
693static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
694{
864472e9 695 struct nfs4_state *newstate;
864472e9
TM
696 int ret;
697
698 /* memory barrier prior to reading state->n_* */
2ced46c2 699 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM
700 smp_rmb();
701 if (state->n_rdwr != 0) {
2ced46c2 702 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM
703 if (ret != 0)
704 return ret;
2ced46c2
TM
705 if (newstate != state)
706 return -ESTALE;
864472e9
TM
707 }
708 if (state->n_wronly != 0) {
2ced46c2 709 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM
710 if (ret != 0)
711 return ret;
2ced46c2
TM
712 if (newstate != state)
713 return -ESTALE;
864472e9
TM
714 }
715 if (state->n_rdonly != 0) {
2ced46c2 716 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM
717 if (ret != 0)
718 return ret;
2ced46c2
TM
719 if (newstate != state)
720 return -ESTALE;
864472e9 721 }
1ac7e2fd
TM
722 /*
723 * We may have performed cached opens for all three recoveries.
724 * Check if we need to update the current stateid.
725 */
726 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
727 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 728 write_seqlock(&state->seqlock);
1ac7e2fd
TM
729 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
730 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 731 write_sequnlock(&state->seqlock);
1ac7e2fd 732 }
864472e9
TM
733 return 0;
734}
735
1da177e4
LT
736/*
737 * OPEN_RECLAIM:
738 * reclaim state on the server after a reboot.
1da177e4 739 */
539cd03a 740static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 741{
1ac7e2fd 742 struct nfs_delegation *delegation;
864472e9 743 struct nfs4_opendata *opendata;
dc0b027d 744 fmode_t delegation_type = 0;
1da177e4
LT
745 int status;
746
6f220ed5
TM
747 opendata = nfs4_open_recoverdata_alloc(ctx, state);
748 if (IS_ERR(opendata))
749 return PTR_ERR(opendata);
864472e9
TM
750 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
751 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM
752 rcu_read_lock();
753 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 754 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 755 delegation_type = delegation->type;
1ac7e2fd 756 rcu_read_unlock();
864472e9
TM
757 opendata->o_arg.u.delegation_type = delegation_type;
758 status = nfs4_open_recover(opendata, state);
c6d00e63 759 nfs4_opendata_put(opendata);
1da177e4
LT
760 return status;
761}
762
539cd03a 763static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT
764{
765 struct nfs_server *server = NFS_SERVER(state->inode);
766 struct nfs4_exception exception = { };
767 int err;
768 do {
539cd03a 769 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM
770 if (err != -NFS4ERR_DELAY)
771 break;
772 nfs4_handle_exception(server, err, &exception);
1da177e4
LT
773 } while (exception.retry);
774 return err;
775}
776
864472e9
TM
777static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
778{
779 struct nfs_open_context *ctx;
780 int ret;
781
782 ctx = nfs4_state_find_open_context(state);
783 if (IS_ERR(ctx))
784 return PTR_ERR(ctx);
539cd03a 785 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM
786 put_nfs_open_context(ctx);
787 return ret;
788}
789
13437e12 790static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 791{
e56e0b78 792 struct nfs4_opendata *opendata;
864472e9 793 int ret;
1da177e4 794
6f220ed5
TM
795 opendata = nfs4_open_recoverdata_alloc(ctx, state);
796 if (IS_ERR(opendata))
797 return PTR_ERR(opendata);
e56e0b78 798 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 799 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 800 sizeof(opendata->o_arg.u.delegation.data));
864472e9 801 ret = nfs4_open_recover(opendata, state);
c6d00e63 802 nfs4_opendata_put(opendata);
864472e9 803 return ret;
1da177e4
LT
804}
805
13437e12 806int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT
807{
808 struct nfs4_exception exception = { };
539cd03a 809 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT
810 int err;
811 do {
13437e12 812 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT
813 switch (err) {
814 case 0:
815 return err;
816 case -NFS4ERR_STALE_CLIENTID:
817 case -NFS4ERR_STALE_STATEID:
818 case -NFS4ERR_EXPIRED:
819 /* Don't recall a delegation if it was lost */
7539bbab 820 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT
821 return err;
822 }
823 err = nfs4_handle_exception(server, err, &exception);
824 } while (exception.retry);
825 return err;
826}
827
cdd4e68b
TM
828static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
829{
830 struct nfs4_opendata *data = calldata;
831
832 data->rpc_status = task->tk_status;
833 if (RPC_ASSASSINATED(task))
834 return;
26e976a8 835 if (data->rpc_status == 0) {
cdd4e68b
TM
836 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
837 sizeof(data->o_res.stateid.data));
bb22629e 838 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 839 renew_lease(data->o_res.server, data->timestamp);
3e309914 840 data->rpc_done = 1;
26e976a8 841 }
cdd4e68b
TM
842}
843
844static void nfs4_open_confirm_release(void *calldata)
845{
846 struct nfs4_opendata *data = calldata;
847 struct nfs4_state *state = NULL;
848
849 /* If this request hasn't been cancelled, do nothing */
850 if (data->cancelled == 0)
851 goto out_free;
852 /* In case of error, no cleanup! */
3e309914 853 if (!data->rpc_done)
cdd4e68b 854 goto out_free;
cdd4e68b 855 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 856 if (!IS_ERR(state))
dc0b027d 857 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 858out_free:
c6d00e63 859 nfs4_opendata_put(data);
cdd4e68b
TM
860}
861
862static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM
863 .rpc_call_done = nfs4_open_confirm_done,
864 .rpc_release = nfs4_open_confirm_release,
865};
866
867/*
868 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
869 */
870static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
871{
872 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
873 struct rpc_task *task;
5138fde0
TM
874 struct rpc_message msg = {
875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
876 .rpc_argp = &data->c_arg,
877 .rpc_resp = &data->c_res,
878 .rpc_cred = data->owner->so_cred,
879 };
c970aa85
TM
880 struct rpc_task_setup task_setup_data = {
881 .rpc_client = server->client,
5138fde0 882 .rpc_message = &msg,
c970aa85
TM
883 .callback_ops = &nfs4_open_confirm_ops,
884 .callback_data = data,
101070ca 885 .workqueue = nfsiod_workqueue,
c970aa85
TM
886 .flags = RPC_TASK_ASYNC,
887 };
1da177e4
LT
888 int status;
889
c6d00e63 890 kref_get(&data->kref);
3e309914
TM
891 data->rpc_done = 0;
892 data->rpc_status = 0;
5138fde0 893 data->timestamp = jiffies;
c970aa85 894 task = rpc_run_task(&task_setup_data);
7a1218a2 895 if (IS_ERR(task))
cdd4e68b 896 return PTR_ERR(task);
cdd4e68b
TM
897 status = nfs4_wait_for_completion_rpc_task(task);
898 if (status != 0) {
899 data->cancelled = 1;
900 smp_wmb();
901 } else
902 status = data->rpc_status;
e6b3c4db 903 rpc_put_task(task);
1da177e4
LT
904 return status;
905}
906
24ac23ab 907static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 908{
24ac23ab
TM
909 struct nfs4_opendata *data = calldata;
910 struct nfs4_state_owner *sp = data->owner;
5138fde0 911
24ac23ab
TM
912 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
913 return;
aac00a8d
TM
914 /*
915 * Check if we still need to send an OPEN call, or if we can use
916 * a delegation instead.
917 */
918 if (data->state != NULL) {
919 struct nfs_delegation *delegation;
920
dc0b027d 921 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 922 goto out_no_action;
aac00a8d
TM
923 rcu_read_lock();
924 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
925 if (delegation != NULL &&
15c831bf 926 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 927 rcu_read_unlock();
6ee41268 928 goto out_no_action;
aac00a8d
TM
929 }
930 rcu_read_unlock();
931 }
24ac23ab 932 /* Update sequence id. */
9f958ab8 933 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 934 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 935 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 936 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM
937 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
938 }
26e976a8 939 data->timestamp = jiffies;
5138fde0 940 rpc_call_start(task);
6ee41268
TM
941 return;
942out_no_action:
943 task->tk_action = NULL;
944
24ac23ab 945}
1da177e4 946
24ac23ab
TM
947static void nfs4_open_done(struct rpc_task *task, void *calldata)
948{
949 struct nfs4_opendata *data = calldata;
1da177e4 950
24ac23ab
TM
951 data->rpc_status = task->tk_status;
952 if (RPC_ASSASSINATED(task))
953 return;
954 if (task->tk_status == 0) {
955 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM
956 case S_IFREG:
957 break;
958 case S_IFLNK:
24ac23ab 959 data->rpc_status = -ELOOP;
6f926b5b
TM
960 break;
961 case S_IFDIR:
24ac23ab 962 data->rpc_status = -EISDIR;
6f926b5b
TM
963 break;
964 default:
24ac23ab 965 data->rpc_status = -ENOTDIR;
6f926b5b 966 }
26e976a8 967 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM
968 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
969 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 970 }
3e309914 971 data->rpc_done = 1;
24ac23ab 972}
6f926b5b 973
24ac23ab
TM
974static void nfs4_open_release(void *calldata)
975{
976 struct nfs4_opendata *data = calldata;
977 struct nfs4_state *state = NULL;
978
979 /* If this request hasn't been cancelled, do nothing */
980 if (data->cancelled == 0)
981 goto out_free;
982 /* In case of error, no cleanup! */
3e309914 983 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM
984 goto out_free;
985 /* In case we need an open_confirm, no cleanup! */
986 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
987 goto out_free;
24ac23ab 988 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 989 if (!IS_ERR(state))
dc0b027d 990 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 991out_free:
c6d00e63 992 nfs4_opendata_put(data);
24ac23ab
TM
993}
994
995static const struct rpc_call_ops nfs4_open_ops = {
996 .rpc_call_prepare = nfs4_open_prepare,
997 .rpc_call_done = nfs4_open_done,
998 .rpc_release = nfs4_open_release,
999};
1000
1001/*
1002 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1003 */
1004static int _nfs4_proc_open(struct nfs4_opendata *data)
1005{
1006 struct inode *dir = data->dir->d_inode;
1007 struct nfs_server *server = NFS_SERVER(dir);
1008 struct nfs_openargs *o_arg = &data->o_arg;
1009 struct nfs_openres *o_res = &data->o_res;
1010 struct rpc_task *task;
5138fde0
TM
1011 struct rpc_message msg = {
1012 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1013 .rpc_argp = o_arg,
1014 .rpc_resp = o_res,
1015 .rpc_cred = data->owner->so_cred,
1016 };
c970aa85
TM
1017 struct rpc_task_setup task_setup_data = {
1018 .rpc_client = server->client,
5138fde0 1019 .rpc_message = &msg,
c970aa85
TM
1020 .callback_ops = &nfs4_open_ops,
1021 .callback_data = data,
101070ca 1022 .workqueue = nfsiod_workqueue,
c970aa85
TM
1023 .flags = RPC_TASK_ASYNC,
1024 };
24ac23ab
TM
1025 int status;
1026
c6d00e63 1027 kref_get(&data->kref);
3e309914
TM
1028 data->rpc_done = 0;
1029 data->rpc_status = 0;
2ced46c2 1030 data->cancelled = 0;
c970aa85 1031 task = rpc_run_task(&task_setup_data);
7a1218a2 1032 if (IS_ERR(task))
24ac23ab 1033 return PTR_ERR(task);
24ac23ab
TM
1034 status = nfs4_wait_for_completion_rpc_task(task);
1035 if (status != 0) {
1036 data->cancelled = 1;
1037 smp_wmb();
1038 } else
1039 status = data->rpc_status;
e6b3c4db 1040 rpc_put_task(task);
3e309914 1041 if (status != 0 || !data->rpc_done)
24ac23ab
TM
1042 return status;
1043
9936781d
TM
1044 if (o_res->fh.size == 0)
1045 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1046
56ae19f3
TM
1047 if (o_arg->open_flags & O_CREAT) {
1048 update_changeattr(dir, &o_res->cinfo);
1049 nfs_post_op_update_inode(dir, o_res->dir_attr);
1050 } else
1051 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1052 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1053 status = _nfs4_proc_open_confirm(data);
1da177e4 1054 if (status != 0)
24ac23ab 1055 return status;
1da177e4
LT
1056 }
1057 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1058 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1059 return 0;
1da177e4
LT
1060}
1061
10afec90 1062static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1063{
7539bbab 1064 struct nfs_client *clp = server->nfs_client;
6b30954e 1065 int ret;
58d9714a 1066
6b30954e 1067 for (;;) {
65de872e 1068 ret = nfs4_wait_clnt_recover(clp);
6b30954e
TM
1069 if (ret != 0)
1070 return ret;
e598d843
TM
1071 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1072 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1073 break;
58d9714a 1074 nfs4_schedule_state_recovery(clp);
6b30954e
TM
1075 }
1076 return 0;
58d9714a
TM
1077}
1078
1da177e4
LT
1079/*
1080 * OPEN_EXPIRED:
1081 * reclaim state on the server after a network partition.
1082 * Assumes caller holds the appropriate lock
1083 */
539cd03a 1084static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1085{
e56e0b78 1086 struct nfs4_opendata *opendata;
864472e9 1087 int ret;
1da177e4 1088
6f220ed5
TM
1089 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1090 if (IS_ERR(opendata))
1091 return PTR_ERR(opendata);
864472e9 1092 ret = nfs4_open_recover(opendata, state);
35d05778 1093 if (ret == -ESTALE)
539cd03a 1094 d_drop(ctx->path.dentry);
c6d00e63 1095 nfs4_opendata_put(opendata);
864472e9 1096 return ret;
1da177e4
LT
1097}
1098
539cd03a 1099static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1100{
539cd03a 1101 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM
1102 struct nfs4_exception exception = { };
1103 int err;
1104
1105 do {
539cd03a 1106 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM
1107 if (err != -NFS4ERR_DELAY)
1108 break;
1109 nfs4_handle_exception(server, err, &exception);
202b50dc
TM
1110 } while (exception.retry);
1111 return err;
1112}
1113
1da177e4
LT
1114static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1115{
1da177e4 1116 struct nfs_open_context *ctx;
864472e9 1117 int ret;
1da177e4 1118
864472e9
TM
1119 ctx = nfs4_state_find_open_context(state);
1120 if (IS_ERR(ctx))
1121 return PTR_ERR(ctx);
539cd03a 1122 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM
1123 put_nfs_open_context(ctx);
1124 return ret;
1da177e4
LT
1125}
1126
aa53ed54
JL
1127/*
1128 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1129 * fields corresponding to attributes that were used to store the verifier.
1130 * Make sure we clobber those fields in the later setattr call
1131 */
1132static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1133{
1134 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1135 !(sattr->ia_valid & ATTR_ATIME_SET))
1136 sattr->ia_valid |= ATTR_ATIME;
1137
1138 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1139 !(sattr->ia_valid & ATTR_MTIME_SET))
1140 sattr->ia_valid |= ATTR_MTIME;
1141}
1142
1da177e4 1143/*
24ac23ab 1144 * Returns a referenced nfs4_state
1da177e4 1145 */
dc0b027d 1146static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT
1147{
1148 struct nfs4_state_owner *sp;
1149 struct nfs4_state *state = NULL;
1150 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1151 struct nfs4_opendata *opendata;
aac00a8d 1152 int status;
1da177e4
LT
1153
1154 /* Protect against reboot recovery conflicts */
1da177e4
LT
1155 status = -ENOMEM;
1156 if (!(sp = nfs4_get_state_owner(server, cred))) {
1157 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1158 goto out_err;
1159 }
58d9714a
TM
1160 status = nfs4_recover_expired_lease(server);
1161 if (status != 0)
b4454fe1 1162 goto err_put_state_owner;
aac00a8d 1163 if (path->dentry->d_inode != NULL)
dc0b027d 1164 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1165 status = -ENOMEM;
dc0b027d 1166 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1167 if (opendata == NULL)
95d35cb4 1168 goto err_put_state_owner;
1da177e4 1169
aac00a8d
TM
1170 if (path->dentry->d_inode != NULL)
1171 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1172
24ac23ab 1173 status = _nfs4_proc_open(opendata);
1da177e4 1174 if (status != 0)
c6d00e63 1175 goto err_opendata_put;
1da177e4 1176
aa53ed54
JL
1177 if (opendata->o_arg.open_flags & O_EXCL)
1178 nfs4_exclusive_attrset(opendata, sattr);
1179
24ac23ab 1180 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM
1181 status = PTR_ERR(state);
1182 if (IS_ERR(state))
c6d00e63 1183 goto err_opendata_put;
c6d00e63 1184 nfs4_opendata_put(opendata);
1da177e4 1185 nfs4_put_state_owner(sp);
1da177e4
LT
1186 *res = state;
1187 return 0;
c6d00e63
TM
1188err_opendata_put:
1189 nfs4_opendata_put(opendata);
e56e0b78
TM
1190err_put_state_owner:
1191 nfs4_put_state_owner(sp);
1da177e4 1192out_err:
1da177e4
LT
1193 *res = NULL;
1194 return status;
1195}
1196
1197
dc0b027d 1198static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT
1199{
1200 struct nfs4_exception exception = { };
1201 struct nfs4_state *res;
1202 int status;
1203
1204 do {
dc0b027d 1205 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT
1206 if (status == 0)
1207 break;
1208 /* NOTE: BAD_SEQID means the server and client disagree about the
1209 * book-keeping w.r.t. state-changing operations
1210 * (OPEN/CLOSE/LOCK/LOCKU...)
1211 * It is actually a sign of a bug on the client or on the server.
1212 *
1213 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1214 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT
1215 * have unhashed the old state_owner for us, and that we can
1216 * therefore safely retry using a new one. We should still warn
1217 * the user though...
1218 */
1219 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM
1220 printk(KERN_WARNING "NFS: v4 server %s "
1221 " returned a bad sequence-id error!\n",
1222 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT
1223 exception.retry = 1;
1224 continue;
1225 }
550f5747
TM
1226 /*
1227 * BAD_STATEID on OPEN means that the server cancelled our
1228 * state before it received the OPEN_CONFIRM.
1229 * Recover by retrying the request as per the discussion
1230 * on Page 181 of RFC3530.
1231 */
1232 if (status == -NFS4ERR_BAD_STATEID) {
1233 exception.retry = 1;
1234 continue;
1235 }
aac00a8d
TM
1236 if (status == -EAGAIN) {
1237 /* We must have found a delegation */
1238 exception.retry = 1;
1239 continue;
1240 }
1da177e4
LT
1241 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1242 status, &exception));
1243 } while (exception.retry);
1244 return res;
1245}
1246
659bfcd6
TM
1247static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1248 struct nfs_fattr *fattr, struct iattr *sattr,
1249 struct nfs4_state *state)
1da177e4 1250{
3e4f6290 1251 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1252 struct nfs_setattrargs arg = {
3e4f6290 1253 .fh = NFS_FH(inode),
1da177e4
LT
1254 .iap = sattr,
1255 .server = server,
1256 .bitmask = server->attr_bitmask,
1257 };
1258 struct nfs_setattrres res = {
1259 .fattr = fattr,
1260 .server = server,
1261 };
1262 struct rpc_message msg = {
659bfcd6
TM
1263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1264 .rpc_argp = &arg,
1265 .rpc_resp = &res,
1266 .rpc_cred = cred,
1da177e4 1267 };
26e976a8 1268 unsigned long timestamp = jiffies;
65e4308d 1269 int status;
1da177e4 1270
0e574af1 1271 nfs_fattr_init(fattr);
1da177e4 1272
3e4f6290
TM
1273 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1274 /* Use that stateid */
1275 } else if (state != NULL) {
08e9eac4
TM
1276 nfs4_copy_stateid(&arg.stateid, state, current->files);
1277 } else
1da177e4
LT
1278 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1279
65e4308d 1280 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM
1281 if (status == 0 && state != NULL)
1282 renew_lease(server, timestamp);
65e4308d 1283 return status;
1da177e4
LT
1284}
1285
659bfcd6
TM
1286static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1287 struct nfs_fattr *fattr, struct iattr *sattr,
1288 struct nfs4_state *state)
1da177e4 1289{
3e4f6290 1290 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT
1291 struct nfs4_exception exception = { };
1292 int err;
1293 do {
1294 err = nfs4_handle_exception(server,
659bfcd6 1295 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT
1296 &exception);
1297 } while (exception.retry);
1298 return err;
1299}
1300
1301struct nfs4_closedata {
4a35bd41 1302 struct path path;
1da177e4
LT
1303 struct inode *inode;
1304 struct nfs4_state *state;
1305 struct nfs_closeargs arg;
1306 struct nfs_closeres res;
516a6af6 1307 struct nfs_fattr fattr;
26e976a8 1308 unsigned long timestamp;
1da177e4
LT
1309};
1310
963d8fe5 1311static void nfs4_free_closedata(void *data)
9512135d 1312{
963d8fe5
TM
1313 struct nfs4_closedata *calldata = data;
1314 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM
1315
1316 nfs4_put_open_state(calldata->state);
1317 nfs_free_seqid(calldata->arg.seqid);
9512135d 1318 nfs4_put_state_owner(sp);
31f31db1 1319 path_put(&calldata->path);
9512135d
TM
1320 kfree(calldata);
1321}
1322
963d8fe5 1323static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1324{
963d8fe5 1325 struct nfs4_closedata *calldata = data;
1da177e4 1326 struct nfs4_state *state = calldata->state;
1da177e4
LT
1327 struct nfs_server *server = NFS_SERVER(calldata->inode);
1328
4ce70ada
TM
1329 if (RPC_ASSASSINATED(task))
1330 return;
1da177e4
LT
1331 /* hmm. we are done with the inode, and in the process of freeing
1332 * the state_owner. we keep this around to process errors
1333 */
1da177e4
LT
1334 switch (task->tk_status) {
1335 case 0:
45328c35 1336 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1337 renew_lease(server, calldata->timestamp);
1da177e4
LT
1338 break;
1339 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM
1340 case -NFS4ERR_OLD_STATEID:
1341 case -NFS4ERR_BAD_STATEID:
1da177e4 1342 case -NFS4ERR_EXPIRED:
dc0b027d 1343 if (calldata->arg.fmode == 0)
9e33bed5 1344 break;
1da177e4 1345 default:
9e33bed5 1346 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1da177e4
LT
1347 rpc_restart_call(task);
1348 return;
1349 }
1350 }
516a6af6 1351 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT
1352}
1353
4ce70ada 1354static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1355{
4ce70ada 1356 struct nfs4_closedata *calldata = data;
9512135d 1357 struct nfs4_state *state = calldata->state;
003707c7 1358 int clear_rd, clear_wr, clear_rdwr;
9512135d 1359
963d8fe5 1360 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1361 return;
003707c7 1362
003707c7 1363 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1364 spin_lock(&state->owner->so_lock);
003707c7 1365 /* Calculate the change in open mode */
e7616923 1366 if (state->n_rdwr == 0) {
003707c7 1367 if (state->n_rdonly == 0) {
003707c7
TM
1368 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1369 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1370 }
1371 if (state->n_wronly == 0) {
003707c7
TM
1372 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1373 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1374 }
e7616923 1375 }
4cecb76f 1376 spin_unlock(&state->owner->so_lock);
003707c7 1377 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM
1378 /* Note: exit _without_ calling nfs4_close_done */
1379 task->tk_action = NULL;
9512135d
TM
1380 return;
1381 }
516a6af6 1382 nfs_fattr_init(calldata->res.fattr);
45328c35 1383 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1384 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1385 calldata->arg.fmode = FMODE_READ;
45328c35 1386 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1387 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1388 calldata->arg.fmode = FMODE_WRITE;
45328c35 1389 }
26e976a8 1390 calldata->timestamp = jiffies;
5138fde0 1391 rpc_call_start(task);
1da177e4
LT
1392}
1393
963d8fe5 1394static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1395 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM
1396 .rpc_call_done = nfs4_close_done,
1397 .rpc_release = nfs4_free_closedata,
1398};
1399
1da177e4
LT
1400/*
1401 * It is possible for data to be read/written from a mem-mapped file
1402 * after the sys_close call (which hits the vfs layer as a flush).
1403 * This means that we can't safely call nfsv4 close on a file until
1404 * the inode is cleared. This in turn means that we are not good
1405 * NFSv4 citizens - we do not indicate to the server to update the file's
1406 * share state even when we are done with one of the three share
1407 * stateid's in the inode.
1408 *
1409 * NOTE: Caller must be holding the sp->so_owner semaphore!
1410 */
a49c3c77 1411int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1412{
4a35bd41 1413 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1414 struct nfs4_closedata *calldata;
b39e625b
TM
1415 struct nfs4_state_owner *sp = state->owner;
1416 struct rpc_task *task;
5138fde0
TM
1417 struct rpc_message msg = {
1418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1419 .rpc_cred = state->owner->so_cred,
1420 };
c970aa85
TM
1421 struct rpc_task_setup task_setup_data = {
1422 .rpc_client = server->client,
5138fde0 1423 .rpc_message = &msg,
c970aa85 1424 .callback_ops = &nfs4_close_ops,
101070ca 1425 .workqueue = nfsiod_workqueue,
c970aa85
TM
1426 .flags = RPC_TASK_ASYNC,
1427 };
9512135d 1428 int status = -ENOMEM;
1da177e4 1429
9512135d 1430 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1431 if (calldata == NULL)
9512135d 1432 goto out;
4a35bd41 1433 calldata->inode = state->inode;
1da177e4 1434 calldata->state = state;
4a35bd41 1435 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1436 calldata->arg.stateid = &state->open_stateid;
1da177e4 1437 /* Serialization for the sequence id */
cee54fc9 1438 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM
1439 if (calldata->arg.seqid == NULL)
1440 goto out_free_calldata;
dc0b027d 1441 calldata->arg.fmode = 0;
a65318bf 1442 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1443 calldata->res.fattr = &calldata->fattr;
c1d51931 1444 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1445 calldata->res.server = server;
4a35bd41
TM
1446 calldata->path.mnt = mntget(path->mnt);
1447 calldata->path.dentry = dget(path->dentry);
9512135d 1448
5138fde0
TM
1449 msg.rpc_argp = &calldata->arg,
1450 msg.rpc_resp = &calldata->res,
c970aa85
TM
1451 task_setup_data.callback_data = calldata;
1452 task = rpc_run_task(&task_setup_data);
b39e625b
TM
1453 if (IS_ERR(task))
1454 return PTR_ERR(task);
a49c3c77
TM
1455 status = 0;
1456 if (wait)
1457 status = rpc_wait_for_completion_task(task);
b39e625b 1458 rpc_put_task(task);
a49c3c77 1459 return status;
9512135d
TM
1460out_free_calldata:
1461 kfree(calldata);
1462out:
b39e625b
TM
1463 nfs4_put_open_state(state);
1464 nfs4_put_state_owner(sp);
9512135d 1465 return status;
1da177e4
LT
1466}
1467
dc0b027d 1468static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM
1469{
1470 struct file *filp;
1b45c46c 1471 int ret;
02a913a7 1472
1b45c46c 1473 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1474 if (fmode & FMODE_EXEC) {
af22f94a 1475 ret = nfs_may_open(state->inode,
1b45c46c
TM
1476 state->owner->so_cred,
1477 nd->intent.open.flags);
1478 if (ret < 0)
1479 goto out_close;
1480 }
4a35bd41 1481 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM
1482 if (!IS_ERR(filp)) {
1483 struct nfs_open_context *ctx;
cd3758e3 1484 ctx = nfs_file_open_context(filp);
02a913a7 1485 ctx->state = state;
95cf959b
TM
1486 return 0;
1487 }
1b45c46c
TM
1488 ret = PTR_ERR(filp);
1489out_close:
dc0b027d 1490 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1491 return ret;
02a913a7
TM
1492}
1493
1494struct dentry *
1da177e4
LT
1495nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1496{
ad389da7 1497 struct path path = {
4ac91378 1498 .mnt = nd->path.mnt,
ad389da7
TM
1499 .dentry = dentry,
1500 };
4ac91378 1501 struct dentry *parent;
1da177e4
LT
1502 struct iattr attr;
1503 struct rpc_cred *cred;
1504 struct nfs4_state *state;
02a913a7 1505 struct dentry *res;
dc0b027d 1506 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT
1507
1508 if (nd->flags & LOOKUP_CREATE) {
1509 attr.ia_mode = nd->intent.open.create_mode;
1510 attr.ia_valid = ATTR_MODE;
1511 if (!IS_POSIXACL(dir))
1512 attr.ia_mode &= ~current->fs->umask;
1513 } else {
1514 attr.ia_valid = 0;
1515 BUG_ON(nd->intent.open.flags & O_CREAT);
1516 }
1517
98a8e323 1518 cred = rpc_lookup_cred();
1da177e4 1519 if (IS_ERR(cred))
02a913a7 1520 return (struct dentry *)cred;
565277f6
TM
1521 parent = dentry->d_parent;
1522 /* Protect against concurrent sillydeletes */
1523 nfs_block_sillyrename(parent);
dc0b027d 1524 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1525 put_rpccred(cred);
02a913a7 1526 if (IS_ERR(state)) {
d75340cc 1527 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1528 d_add(dentry, NULL);
d75340cc
TM
1529 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1530 }
565277f6 1531 nfs_unblock_sillyrename(parent);
02a913a7
TM
1532 return (struct dentry *)state;
1533 }
24ac23ab 1534 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1535 if (res != NULL)
deee9369 1536 path.dentry = res;
d75340cc 1537 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1538 nfs_unblock_sillyrename(parent);
dc0b027d 1539 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1540 return res;
1da177e4
LT
1541}
1542
1543int
02a913a7 1544nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1545{
ad389da7 1546 struct path path = {
4ac91378 1547 .mnt = nd->path.mnt,
ad389da7
TM
1548 .dentry = dentry,
1549 };
1da177e4
LT
1550 struct rpc_cred *cred;
1551 struct nfs4_state *state;
dc0b027d 1552 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1553
98a8e323 1554 cred = rpc_lookup_cred();
1da177e4
LT
1555 if (IS_ERR(cred))
1556 return PTR_ERR(cred);
dc0b027d 1557 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1558 put_rpccred(cred);
02a913a7
TM
1559 if (IS_ERR(state)) {
1560 switch (PTR_ERR(state)) {
1561 case -EPERM:
1562 case -EACCES:
1563 case -EDQUOT:
1564 case -ENOSPC:
1565 case -EROFS:
1566 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1567 return 1;
b87c0adf
CL
1568 default:
1569 goto out_drop;
02a913a7 1570 }
02a913a7 1571 }
24ac23ab 1572 if (state->inode == dentry->d_inode) {
d75340cc 1573 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1574 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT
1575 return 1;
1576 }
dc0b027d 1577 nfs4_close_sync(&path, state, fmode);
02a913a7
TM
1578out_drop:
1579 d_drop(dentry);
1da177e4
LT
1580 return 0;
1581}
1582
1583
1584static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1585{
1586 struct nfs4_server_caps_res res = {};
1587 struct rpc_message msg = {
1588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1589 .rpc_argp = fhandle,
1590 .rpc_resp = &res,
1591 };
1592 int status;
1593
1594 status = rpc_call_sync(server->client, &msg, 0);
1595 if (status == 0) {
1596 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1597 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1598 server->caps |= NFS_CAP_ACLS;
1599 if (res.has_links != 0)
1600 server->caps |= NFS_CAP_HARDLINKS;
1601 if (res.has_symlinks != 0)
1602 server->caps |= NFS_CAP_SYMLINKS;
a65318bf
TM
1603 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1604 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1605 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT
1606 server->acl_bitmask = res.acl_bitmask;
1607 }
1608 return status;
1609}
1610
55a97593 1611int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT
1612{
1613 struct nfs4_exception exception = { };
1614 int err;
1615 do {
1616 err = nfs4_handle_exception(server,
1617 _nfs4_server_capabilities(server, fhandle),
1618 &exception);
1619 } while (exception.retry);
1620 return err;
1621}
1622
1623static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1624 struct nfs_fsinfo *info)
1625{
1da177e4
LT
1626 struct nfs4_lookup_root_arg args = {
1627 .bitmask = nfs4_fattr_bitmap,
1628 };
1629 struct nfs4_lookup_res res = {
1630 .server = server,
0e574af1 1631 .fattr = info->fattr,
1da177e4
LT
1632 .fh = fhandle,
1633 };
1634 struct rpc_message msg = {
1635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1636 .rpc_argp = &args,
1637 .rpc_resp = &res,
1638 };
0e574af1 1639 nfs_fattr_init(info->fattr);
1da177e4
LT
1640 return rpc_call_sync(server->client, &msg, 0);
1641}
1642
1643static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1644 struct nfs_fsinfo *info)
1645{
1646 struct nfs4_exception exception = { };
1647 int err;
1648 do {
1649 err = nfs4_handle_exception(server,
1650 _nfs4_lookup_root(server, fhandle, info),
1651 &exception);
1652 } while (exception.retry);
1653 return err;
1654}
1655
54ceac45
DH
1656/*
1657 * get the file handle for the "/" directory on the server
1658 */
1da177e4 1659static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1660 struct nfs_fsinfo *info)
1da177e4 1661{
1da177e4
LT
1662 int status;
1663
1da177e4 1664 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT
1665 if (status == 0)
1666 status = nfs4_server_capabilities(server, fhandle);
1667 if (status == 0)
1668 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1669 return nfs4_map_errors(status);
1da177e4
LT
1670}
1671
6b97fd3d
MN
1672/*
1673 * Get locations and (maybe) other attributes of a referral.
1674 * Note that we'll actually follow the referral later when
1675 * we detect fsid mismatch in inode revalidation
1676 */
56659e99 1677static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN
1678{
1679 int status = -ENOMEM;
1680 struct page *page = NULL;
1681 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN
1682
1683 page = alloc_page(GFP_KERNEL);
1684 if (page == NULL)
1685 goto out;
1686 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1687 if (locations == NULL)
1688 goto out;
1689
c228fd3a 1690 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN
1691 if (status != 0)
1692 goto out;
1693 /* Make sure server returned a different fsid for the referral */
1694 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 1695 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN
1696 status = -EIO;
1697 goto out;
1698 }
1699
1700 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1701 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1702 if (!fattr->mode)
1703 fattr->mode = S_IFDIR;
1704 memset(fhandle, 0, sizeof(struct nfs_fh));
1705out:
1706 if (page)
1707 __free_page(page);
1708 if (locations)
1709 kfree(locations);
1710 return status;
1711}
1712
1da177e4
LT
1713static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1714{
1715 struct nfs4_getattr_arg args = {
1716 .fh = fhandle,
1717 .bitmask = server->attr_bitmask,
1718 };
1719 struct nfs4_getattr_res res = {
1720 .fattr = fattr,
1721 .server = server,
1722 };
1723 struct rpc_message msg = {
1724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1725 .rpc_argp = &args,
1726 .rpc_resp = &res,
1727 };
1728
0e574af1 1729 nfs_fattr_init(fattr);
1da177e4
LT
1730 return rpc_call_sync(server->client, &msg, 0);
1731}
1732
1733static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1734{
1735 struct nfs4_exception exception = { };
1736 int err;
1737 do {
1738 err = nfs4_handle_exception(server,
1739 _nfs4_proc_getattr(server, fhandle, fattr),
1740 &exception);
1741 } while (exception.retry);
1742 return err;
1743}
1744
1745/*
1746 * The file is not closed if it is opened due to the a request to change
1747 * the size of the file. The open call will not be needed once the
1748 * VFS layer lookup-intents are implemented.
1749 *
1750 * Close is called when the inode is destroyed.
1751 * If we haven't opened the file for O_WRONLY, we
1752 * need to in the size_change case to obtain a stateid.
1753 *
1754 * Got race?
1755 * Because OPEN is always done by name in nfsv4, it is
1756 * possible that we opened a different file by the same
1757 * name. We can recognize this race condition, but we
1758 * can't do anything about it besides returning an error.
1759 *
1760 * This will be fixed with VFS changes (lookup-intent).
1761 */
1762static int
1763nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1764 struct iattr *sattr)
1765{
08e9eac4 1766 struct inode *inode = dentry->d_inode;
659bfcd6 1767 struct rpc_cred *cred = NULL;
d530838b 1768 struct nfs4_state *state = NULL;
1da177e4
LT
1769 int status;
1770
0e574af1 1771 nfs_fattr_init(fattr);
1da177e4 1772
d530838b 1773 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM
1774 if (sattr->ia_valid & ATTR_FILE) {
1775 struct nfs_open_context *ctx;
1776
1777 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB
1778 if (ctx) {
1779 cred = ctx->cred;
1780 state = ctx->state;
1781 }
659bfcd6 1782 }
08e9eac4 1783
659bfcd6 1784 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM
1785 if (status == 0)
1786 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT
1787 return status;
1788}
1789
56659e99
TM
1790static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1791 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH
1792 struct nfs_fattr *fattr)
1793{
1794 int status;
1795 struct nfs4_lookup_arg args = {
1796 .bitmask = server->attr_bitmask,
1797 .dir_fh = dirfh,
1798 .name = name,
1799 };
1800 struct nfs4_lookup_res res = {
1801 .server = server,
1802 .fattr = fattr,
1803 .fh = fhandle,
1804 };
1805 struct rpc_message msg = {
1806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1807 .rpc_argp = &args,
1808 .rpc_resp = &res,
1809 };
1810
1811 nfs_fattr_init(fattr);
1812
1813 dprintk("NFS call lookupfh %s\n", name->name);
1814 status = rpc_call_sync(server->client, &msg, 0);
1815 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH
1816 return status;
1817}
1818
1819static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1820 struct qstr *name, struct nfs_fh *fhandle,
1821 struct nfs_fattr *fattr)
1822{
1823 struct nfs4_exception exception = { };
1824 int err;
1825 do {
4e56e082
TM
1826 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1827 /* FIXME: !!!! */
1828 if (err == -NFS4ERR_MOVED) {
1829 err = -EREMOTE;
1830 break;
1831 }
1832 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH
1833 } while (exception.retry);
1834 return err;
1835}
1836
56659e99 1837static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT
1838 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1839{
4e56e082 1840 int status;
1da177e4
LT
1841
1842 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1843 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN
1844 if (status == -NFS4ERR_MOVED)
1845 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT
1846 dprintk("NFS reply lookup: %d\n", status);
1847 return status;
1848}
1849
1850static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1851{
1852 struct nfs4_exception exception = { };
1853 int err;
1854 do {
1855 err = nfs4_handle_exception(NFS_SERVER(dir),
1856 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1857 &exception);
1858 } while (exception.retry);
1859 return err;
1860}
1861
1862static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1863{
76b32999
TM
1864 struct nfs_server *server = NFS_SERVER(inode);
1865 struct nfs_fattr fattr;
1da177e4
LT
1866 struct nfs4_accessargs args = {
1867 .fh = NFS_FH(inode),
76b32999
TM
1868 .bitmask = server->attr_bitmask,
1869 };
1870 struct nfs4_accessres res = {
1871 .server = server,
1872 .fattr = &fattr,
1da177e4 1873 };
1da177e4
LT
1874 struct rpc_message msg = {
1875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1876 .rpc_argp = &args,
1877 .rpc_resp = &res,
1878 .rpc_cred = entry->cred,
1879 };
1880 int mode = entry->mask;
1881 int status;
1882
1883 /*
1884 * Determine which access bits we want to ask for...
1885 */
1886 if (mode & MAY_READ)
1887 args.access |= NFS4_ACCESS_READ;
1888 if (S_ISDIR(inode->i_mode)) {
1889 if (mode & MAY_WRITE)
1890 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1891 if (mode & MAY_EXEC)
1892 args.access |= NFS4_ACCESS_LOOKUP;
1893 } else {
1894 if (mode & MAY_WRITE)
1895 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1896 if (mode & MAY_EXEC)
1897 args.access |= NFS4_ACCESS_EXECUTE;
1898 }
76b32999 1899 nfs_fattr_init(&fattr);
1da177e4
LT
1900 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1901 if (!status) {
1902 entry->mask = 0;
1903 if (res.access & NFS4_ACCESS_READ)
1904 entry->mask |= MAY_READ;
1905 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1906 entry->mask |= MAY_WRITE;
1907 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1908 entry->mask |= MAY_EXEC;
76b32999 1909 nfs_refresh_inode(inode, &fattr);
1da177e4
LT
1910 }
1911 return status;
1912}
1913
1914static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1915{
1916 struct nfs4_exception exception = { };
1917 int err;
1918 do {
1919 err = nfs4_handle_exception(NFS_SERVER(inode),
1920 _nfs4_proc_access(inode, entry),
1921 &exception);
1922 } while (exception.retry);
1923 return err;
1924}
1925
1926/*
1927 * TODO: For the time being, we don't try to get any attributes
1928 * along with any of the zero-copy operations READ, READDIR,
1929 * READLINK, WRITE.
1930 *
1931 * In the case of the first three, we want to put the GETATTR
1932 * after the read-type operation -- this is because it is hard
1933 * to predict the length of a GETATTR response in v4, and thus
1934 * align the READ data correctly. This means that the GETATTR
1935 * may end up partially falling into the page cache, and we should
1936 * shift it into the 'tail' of the xdr_buf before processing.
1937 * To do this efficiently, we need to know the total length
1938 * of data received, which doesn't seem to be available outside
1939 * of the RPC layer.
1940 *
1941 * In the case of WRITE, we also want to put the GETATTR after
1942 * the operation -- in this case because we want to make sure
1943 * we get the post-operation mtime and size. This means that
1944 * we can't use xdr_encode_pages() as written: we need a variant
1945 * of it which would leave room in the 'tail' iovec.
1946 *
1947 * Both of these changes to the XDR layer would in fact be quite
1948 * minor, but I decided to leave them for a subsequent patch.
1949 */
1950static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1951 unsigned int pgbase, unsigned int pglen)
1952{
1953 struct nfs4_readlink args = {
1954 .fh = NFS_FH(inode),
1955 .pgbase = pgbase,
1956 .pglen = pglen,
1957 .pages = &page,
1958 };
1959 struct rpc_message msg = {
1960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1961 .rpc_argp = &args,
1962 .rpc_resp = NULL,
1963 };
1964
1965 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1966}
1967
1968static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1969 unsigned int pgbase, unsigned int pglen)
1970{
1971 struct nfs4_exception exception = { };
1972 int err;
1973 do {
1974 err = nfs4_handle_exception(NFS_SERVER(inode),
1975 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1976 &exception);
1977 } while (exception.retry);
1978 return err;
1979}
1980
1da177e4
LT
1981/*
1982 * Got race?
1983 * We will need to arrange for the VFS layer to provide an atomic open.
1984 * Until then, this create/open method is prone to inefficiency and race
1985 * conditions due to the lookup, create, and open VFS calls from sys_open()
1986 * placed on the wire.
1987 *
1988 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1989 * The file will be opened again in the subsequent VFS open call
1990 * (nfs4_proc_file_open).
1991 *
1992 * The open for read will just hang around to be used by any process that
1993 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1994 */
1995
1996static int
1997nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1998 int flags, struct nameidata *nd)
1da177e4 1999{
ad389da7 2000 struct path path = {
4ac91378 2001 .mnt = nd->path.mnt,
ad389da7
TM
2002 .dentry = dentry,
2003 };
1da177e4
LT
2004 struct nfs4_state *state;
2005 struct rpc_cred *cred;
dc0b027d 2006 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT
2007 int status = 0;
2008
98a8e323 2009 cred = rpc_lookup_cred();
1da177e4
LT
2010 if (IS_ERR(cred)) {
2011 status = PTR_ERR(cred);
2012 goto out;
2013 }
dc0b027d 2014 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2015 d_drop(dentry);
1da177e4
LT
2016 if (IS_ERR(state)) {
2017 status = PTR_ERR(state);
659bfcd6 2018 goto out_putcred;
1da177e4 2019 }
d4d9cdcb 2020 d_add(dentry, igrab(state->inode));
d75340cc 2021 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT
2022 if (flags & O_EXCL) {
2023 struct nfs_fattr fattr;
659bfcd6 2024 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2025 if (status == 0)
65e4308d 2026 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2027 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2028 }
ad389da7 2029 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2030 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2031 else
dc0b027d 2032 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM
2033out_putcred:
2034 put_rpccred(cred);
1da177e4
LT
2035out:
2036 return status;
2037}
2038
2039static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2040{
16e42959 2041 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2042 struct nfs_removeargs args = {
1da177e4 2043 .fh = NFS_FH(dir),
4fdc17b2
TM
2044 .name.len = name->len,
2045 .name.name = name->name,
16e42959
TM
2046 .bitmask = server->attr_bitmask,
2047 };
4fdc17b2 2048 struct nfs_removeres res = {
16e42959 2049 .server = server,
1da177e4 2050 };
1da177e4 2051 struct rpc_message msg = {
4fdc17b2
TM
2052 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2053 .rpc_argp = &args,
2054 .rpc_resp = &res,
1da177e4
LT
2055 };
2056 int status;
2057
4fdc17b2 2058 nfs_fattr_init(&res.dir_attr);
16e42959
TM
2059 status = rpc_call_sync(server->client, &msg, 0);
2060 if (status == 0) {
2061 update_changeattr(dir, &res.cinfo);
4fdc17b2 2062 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2063 }
1da177e4
LT
2064 return status;
2065}
2066
2067static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2068{
2069 struct nfs4_exception exception = { };
2070 int err;
2071 do {
2072 err = nfs4_handle_exception(NFS_SERVER(dir),
2073 _nfs4_proc_remove(dir, name),
2074 &exception);
2075 } while (exception.retry);
2076 return err;
2077}
2078
e4eff1a6 2079static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2080{
e4eff1a6
TM
2081 struct nfs_server *server = NFS_SERVER(dir);
2082 struct nfs_removeargs *args = msg->rpc_argp;
2083 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2084
a65318bf 2085 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2086 res->server = server;
1da177e4 2087 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT
2088}
2089
e4eff1a6 2090static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2091{
e4eff1a6
TM
2092 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2093
9e33bed5 2094 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM
2095 return 0;
2096 update_changeattr(dir, &res->cinfo);
2097 nfs_post_op_update_inode(dir, &res->dir_attr);
2098 return 1;
1da177e4
LT
2099}
2100
2101static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2102 struct inode *new_dir, struct qstr *new_name)
2103{
6caf2c82 2104 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT
2105 struct nfs4_rename_arg arg = {
2106 .old_dir = NFS_FH(old_dir),
2107 .new_dir = NFS_FH(new_dir),
2108 .old_name = old_name,
2109 .new_name = new_name,
6caf2c82
TM
2110 .bitmask = server->attr_bitmask,
2111 };
2112 struct nfs_fattr old_fattr, new_fattr;
2113 struct nfs4_rename_res res = {
2114 .server = server,
2115 .old_fattr = &old_fattr,
2116 .new_fattr = &new_fattr,
1da177e4 2117 };
1da177e4
LT
2118 struct rpc_message msg = {
2119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2120 .rpc_argp = &arg,
2121 .rpc_resp = &res,
2122 };
2123 int status;
2124
6caf2c82
TM
2125 nfs_fattr_init(res.old_fattr);
2126 nfs_fattr_init(res.new_fattr);
2127 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT
2128
2129 if (!status) {
2130 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2131 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2132 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2133 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT
2134 }
2135 return status;
2136}
2137
2138static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2139 struct inode *new_dir, struct qstr *new_name)
2140{
2141 struct nfs4_exception exception = { };
2142 int err;
2143 do {
2144 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2145 _nfs4_proc_rename(old_dir, old_name,
2146 new_dir, new_name),
2147 &exception);
2148 } while (exception.retry);
2149 return err;
2150}
2151
2152static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2153{
91ba2eee 2154 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT
2155 struct nfs4_link_arg arg = {
2156 .fh = NFS_FH(inode),
2157 .dir_fh = NFS_FH(dir),
2158 .name = name,
91ba2eee
TM
2159 .bitmask = server->attr_bitmask,
2160 };
2161 struct nfs_fattr fattr, dir_attr;
2162 struct nfs4_link_res res = {
2163 .server = server,
2164 .fattr = &fattr,
2165 .dir_attr = &dir_attr,
1da177e4 2166 };
1da177e4
LT
2167 struct rpc_message msg = {
2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2169 .rpc_argp = &arg,
91ba2eee 2170 .rpc_resp = &res,
1da177e4
LT
2171 };
2172 int status;
2173
91ba2eee
TM
2174 nfs_fattr_init(res.fattr);
2175 nfs_fattr_init(res.dir_attr);
2176 status = rpc_call_sync(server->client, &msg, 0);
2177 if (!status) {
2178 update_changeattr(dir, &res.cinfo);
2179 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2180 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2181 }
1da177e4
LT
2182
2183 return status;
2184}
2185
2186static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2187{
2188 struct nfs4_exception exception = { };
2189 int err;
2190 do {
2191 err = nfs4_handle_exception(NFS_SERVER(inode),
2192 _nfs4_proc_link(inode, dir, name),
2193 &exception);
2194 } while (exception.retry);
2195 return err;
2196}
2197
57dc9a57
TM
2198struct nfs4_createdata {
2199 struct rpc_message msg;
2200 struct nfs4_create_arg arg;
2201 struct nfs4_create_res res;
2202 struct nfs_fh fh;
2203 struct nfs_fattr fattr;
2204 struct nfs_fattr dir_fattr;
2205};
2206
2207static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2208 struct qstr *name, struct iattr *sattr, u32 ftype)
2209{
2210 struct nfs4_createdata *data;
2211
2212 data = kzalloc(sizeof(*data), GFP_KERNEL);
2213 if (data != NULL) {
2214 struct nfs_server *server = NFS_SERVER(dir);
2215
2216 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2217 data->msg.rpc_argp = &data->arg;
2218 data->msg.rpc_resp = &data->res;
2219 data->arg.dir_fh = NFS_FH(dir);
2220 data->arg.server = server;
2221 data->arg.name = name;
2222 data->arg.attrs = sattr;
2223 data->arg.ftype = ftype;
2224 data->arg.bitmask = server->attr_bitmask;
2225 data->res.server = server;
2226 data->res.fh = &data->fh;
2227 data->res.fattr = &data->fattr;
2228 data->res.dir_fattr = &data->dir_fattr;
2229 nfs_fattr_init(data->res.fattr);
2230 nfs_fattr_init(data->res.dir_fattr);
2231 }
2232 return data;
2233}
2234
2235static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2236{
2237 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2238 if (status == 0) {
2239 update_changeattr(dir, &data->res.dir_cinfo);
2240 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2241 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2242 }
2243 return status;
2244}
2245
2246static void nfs4_free_createdata(struct nfs4_createdata *data)
2247{
2248 kfree(data);
2249}
2250
4f390c15 2251static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2252 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2253{
57dc9a57
TM
2254 struct nfs4_createdata *data;
2255 int status = -ENAMETOOLONG;
1da177e4 2256
94a6d753 2257 if (len > NFS4_MAXPATHLEN)
57dc9a57 2258 goto out;
4f390c15 2259
57dc9a57
TM
2260 status = -ENOMEM;
2261 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2262 if (data == NULL)
2263 goto out;
2264
2265 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2266 data->arg.u.symlink.pages = &page;
2267 data->arg.u.symlink.len = len;
1da177e4 2268
57dc9a57
TM
2269 status = nfs4_do_create(dir, dentry, data);
2270
2271 nfs4_free_createdata(data);
2272out:
1da177e4
LT
2273 return status;
2274}
2275
4f390c15 2276static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2277 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT
2278{
2279 struct nfs4_exception exception = { };
2280 int err;
2281 do {
2282 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL
2283 _nfs4_proc_symlink(dir, dentry, page,
2284 len, sattr),
1da177e4
LT
2285 &exception);
2286 } while (exception.retry);
2287 return err;
2288}
2289
2290static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2291 struct iattr *sattr)
2292{
57dc9a57
TM
2293 struct nfs4_createdata *data;
2294 int status = -ENOMEM;
1da177e4 2295
57dc9a57
TM
2296 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2297 if (data == NULL)
2298 goto out;
2299
2300 status = nfs4_do_create(dir, dentry, data);
2301
2302 nfs4_free_createdata(data);
2303out:
1da177e4
LT
2304 return status;
2305}
2306
2307static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2308 struct iattr *sattr)
2309{
2310 struct nfs4_exception exception = { };
2311 int err;
2312 do {
2313 err = nfs4_handle_exception(NFS_SERVER(dir),
2314 _nfs4_proc_mkdir(dir, dentry, sattr),
2315 &exception);
2316 } while (exception.retry);
2317 return err;
2318}
2319
2320static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2321 u64 cookie, struct page *page, unsigned int count, int plus)
2322{
2323 struct inode *dir = dentry->d_inode;
2324 struct nfs4_readdir_arg args = {
2325 .fh = NFS_FH(dir),
2326 .pages = &page,
2327 .pgbase = 0,
2328 .count = count,
a65318bf 2329 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
1da177e4
LT
2330 };
2331 struct nfs4_readdir_res res;
2332 struct rpc_message msg = {
2333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2334 .rpc_argp = &args,
2335 .rpc_resp = &res,
2336 .rpc_cred = cred,
2337 };
2338 int status;
2339
3110ff80 2340 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM
2341 dentry->d_parent->d_name.name,
2342 dentry->d_name.name,
2343 (unsigned long long)cookie);
1da177e4
LT
2344 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2345 res.pgbase = args.pgbase;
2346 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2347 if (status == 0)
2348 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM
2349
2350 nfs_invalidate_atime(dir);
2351
3110ff80 2352 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT
2353 return status;
2354}
2355
2356static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2357 u64 cookie, struct page *page, unsigned int count, int plus)
2358{
2359 struct nfs4_exception exception = { };
2360 int err;
2361 do {
2362 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2363 _nfs4_proc_readdir(dentry, cred, cookie,
2364 page, count, plus),
2365 &exception);
2366 } while (exception.retry);
2367 return err;
2368}
2369
2370static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2371 struct iattr *sattr, dev_t rdev)
2372{
57dc9a57
TM
2373 struct nfs4_createdata *data;
2374 int mode = sattr->ia_mode;
2375 int status = -ENOMEM;
1da177e4
LT
2376
2377 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2378 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM
2379
2380 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2381 if (data == NULL)
2382 goto out;
2383
1da177e4 2384 if (S_ISFIFO(mode))
57dc9a57 2385 data->arg.ftype = NF4FIFO;
1da177e4 2386 else if (S_ISBLK(mode)) {
57dc9a57
TM
2387 data->arg.ftype = NF4BLK;
2388 data->arg.u.device.specdata1 = MAJOR(rdev);
2389 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT
2390 }
2391 else if (S_ISCHR(mode)) {
57dc9a57
TM
2392 data->arg.ftype = NF4CHR;
2393 data->arg.u.device.specdata1 = MAJOR(rdev);
2394 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2395 }
1da177e4 2396
57dc9a57
TM
2397 status = nfs4_do_create(dir, dentry, data);
2398
2399 nfs4_free_createdata(data);
2400out:
1da177e4
LT
2401 return status;
2402}
2403
2404static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2405 struct iattr *sattr, dev_t rdev)
2406{
2407 struct nfs4_exception exception = { };
2408 int err;
2409 do {
2410 err = nfs4_handle_exception(NFS_SERVER(dir),
2411 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2412 &exception);
2413 } while (exception.retry);
2414 return err;
2415}
2416
2417static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2418 struct nfs_fsstat *fsstat)
2419{
2420 struct nfs4_statfs_arg args = {
2421 .fh = fhandle,
2422 .bitmask = server->attr_bitmask,
2423 };
2424 struct rpc_message msg = {
2425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2426 .rpc_argp = &args,
2427 .rpc_resp = fsstat,
2428 };
2429
0e574af1 2430 nfs_fattr_init(fsstat->fattr);
1da177e4
LT
2431 return rpc_call_sync(server->client, &msg, 0);
2432}
2433
2434static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2435{
2436 struct nfs4_exception exception = { };
2437 int err;
2438 do {
2439 err = nfs4_handle_exception(server,
2440 _nfs4_proc_statfs(server, fhandle, fsstat),
2441 &exception);
2442 } while (exception.retry);
2443 return err;
2444}
2445
2446static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2447 struct nfs_fsinfo *fsinfo)
2448{
2449 struct nfs4_fsinfo_arg args = {
2450 .fh = fhandle,
2451 .bitmask = server->attr_bitmask,
2452 };
2453 struct rpc_message msg = {
2454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2455 .rpc_argp = &args,
2456 .rpc_resp = fsinfo,
2457 };
2458
2459 return rpc_call_sync(server->client, &msg, 0);
2460}
2461
2462static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2463{
2464 struct nfs4_exception exception = { };
2465 int err;
2466
2467 do {
2468 err = nfs4_handle_exception(server,
2469 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2470 &exception);
2471 } while (exception.retry);
2472 return err;
2473}
2474
2475static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2476{
0e574af1 2477 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT
2478 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2479}
2480
2481static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2482 struct nfs_pathconf *pathconf)
2483{
2484 struct nfs4_pathconf_arg args = {
2485 .fh = fhandle,
2486 .bitmask = server->attr_bitmask,
2487 };
2488 struct rpc_message msg = {
2489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2490 .rpc_argp = &args,
2491 .rpc_resp = pathconf,
2492 };
2493
2494 /* None of the pathconf attributes are mandatory to implement */
2495 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2496 memset(pathconf, 0, sizeof(*pathconf));
2497 return 0;
2498 }
2499
0e574af1 2500 nfs_fattr_init(pathconf->fattr);
1da177e4
LT
2501 return rpc_call_sync(server->client, &msg, 0);
2502}
2503
2504static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2505 struct nfs_pathconf *pathconf)
2506{
2507 struct nfs4_exception exception = { };
2508 int err;
2509
2510 do {
2511 err = nfs4_handle_exception(server,
2512 _nfs4_proc_pathconf(server, fhandle, pathconf),
2513 &exception);
2514 } while (exception.retry);
2515 return err;
2516}
2517
ec06c096 2518static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2519{
ec06c096 2520 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2521
9e33bed5 2522 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
1da177e4 2523 rpc_restart_call(task);
ec06c096 2524 return -EAGAIN;
1da177e4 2525 }
8850df99
TM
2526
2527 nfs_invalidate_atime(data->inode);
1da177e4 2528 if (task->tk_status > 0)
ec06c096
TM
2529 renew_lease(server, data->timestamp);
2530 return 0;
1da177e4
LT
2531}
2532
bdc7f021 2533static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2534{
1da177e4 2535 data->timestamp = jiffies;
bdc7f021 2536 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT
2537}
2538
788e7a89 2539static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2540{
1da177e4
LT
2541 struct inode *inode = data->inode;
2542
9e33bed5 2543 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
1da177e4 2544 rpc_restart_call(task);
788e7a89 2545 return -EAGAIN;
1da177e4 2546 }
4f9838c7 2547 if (task->tk_status >= 0) {
1da177e4 2548 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2549 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2550 }
788e7a89 2551 return 0;
1da177e4
LT
2552}
2553
bdc7f021 2554static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2555{
bdc7f021
TM
2556 struct nfs_server *server = NFS_SERVER(data->inode);
2557
a65318bf 2558 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2559 data->res.server = server;
1da177e4
LT
2560 data->timestamp = jiffies;
2561
bdc7f021 2562 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT
2563}
2564
788e7a89 2565static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2566{
1da177e4
LT
2567 struct inode *inode = data->inode;
2568
9e33bed5 2569 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
1da177e4 2570 rpc_restart_call(task);
788e7a89 2571 return -EAGAIN;
1da177e4 2572 }
9e08a3c5 2573 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2574 return 0;
1da177e4
LT
2575}
2576
bdc7f021 2577static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2578{
788e7a89 2579 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2580
a65318bf 2581 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2582 data->res.server = server;
bdc7f021 2583 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT
2584}
2585
2586/*
2587 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2588 * standalone procedure for queueing an asynchronous RENEW.
2589 */
963d8fe5 2590static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2591{
adfa6f98 2592 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2593 unsigned long timestamp = (unsigned long)data;
1da177e4
LT
2594
2595 if (task->tk_status < 0) {
2596 switch (task->tk_status) {
2597 case -NFS4ERR_STALE_CLIENTID:
2598 case -NFS4ERR_EXPIRED:
2599 case -NFS4ERR_CB_PATH_DOWN:
2600 nfs4_schedule_state_recovery(clp);
2601 }
2602 return;
2603 }
2604 spin_lock(&clp->cl_lock);
2605 if (time_before(clp->cl_last_renewal,timestamp))
2606 clp->cl_last_renewal = timestamp;
2607 spin_unlock(&clp->cl_lock);
2608}
2609
963d8fe5
TM
2610static const struct rpc_call_ops nfs4_renew_ops = {
2611 .rpc_call_done = nfs4_renew_done,
2612};
2613
adfa6f98 2614int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT
2615{
2616 struct rpc_message msg = {
2617 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2618 .rpc_argp = clp,
b4454fe1 2619 .rpc_cred = cred,
1da177e4
LT
2620 };
2621
2622 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2623 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT
2624}
2625
adfa6f98 2626int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT
2627{
2628 struct rpc_message msg = {
2629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2630 .rpc_argp = clp,
b4454fe1 2631 .rpc_cred = cred,
1da177e4
LT
2632 };
2633 unsigned long now = jiffies;
2634 int status;
2635
2636 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2637 if (status < 0)
2638 return status;
2639 spin_lock(&clp->cl_lock);
2640 if (time_before(clp->cl_last_renewal,now))
2641 clp->cl_last_renewal = now;
2642 spin_unlock(&clp->cl_lock);
2643 return 0;
2644}
2645
aa1870af
BF
2646static inline int nfs4_server_supports_acls(struct nfs_server *server)
2647{
2648 return (server->caps & NFS_CAP_ACLS)
2649 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2650 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2651}
2652
2653/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2654 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2655 * the stack.
2656 */
2657#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2658
2659static void buf_to_pages(const void *buf, size_t buflen,
2660 struct page **pages, unsigned int *pgbase)
2661{
2662 const void *p = buf;
2663
2664 *pgbase = offset_in_page(buf);
2665 p -= *pgbase;
2666 while (p < buf + buflen) {
2667 *(pages++) = virt_to_page(p);
2668 p += PAGE_CACHE_SIZE;
2669 }
2670}
2671
e50a1c2e
BF
2672struct nfs4_cached_acl {
2673 int cached;
2674 size_t len;
3e9d4154 2675 char data[0];
e50a1c2e
BF
2676};
2677
2678static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2679{
2680 struct nfs_inode *nfsi = NFS_I(inode);
2681
2682 spin_lock(&inode->i_lock);
2683 kfree(nfsi->nfs4_acl);
2684 nfsi->nfs4_acl = acl;
2685 spin_unlock(&inode->i_lock);
2686}
2687
2688static void nfs4_zap_acl_attr(struct inode *inode)
2689{
2690 nfs4_set_cached_acl(inode, NULL);
2691}
2692
2693static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2694{
2695 struct nfs_inode *nfsi = NFS_I(inode);
2696 struct nfs4_cached_acl *acl;
2697 int ret = -ENOENT;
2698
2699 spin_lock(&inode->i_lock);
2700 acl = nfsi->nfs4_acl;
2701 if (acl == NULL)
2702 goto out;
2703 if (buf == NULL) /* user is just asking for length */
2704 goto out_len;
2705 if (acl->cached == 0)
2706 goto out;
2707 ret = -ERANGE; /* see getxattr(2) man page */
2708 if (acl->len > buflen)
2709 goto out;
2710 memcpy(buf, acl->data, acl->len);
2711out_len:
2712 ret = acl->len;
2713out:
2714 spin_unlock(&inode->i_lock);
2715 return ret;
2716}
2717
2718static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2719{
2720 struct nfs4_cached_acl *acl;
2721
2722 if (buf && acl_len <= PAGE_SIZE) {
2723 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2724 if (acl == NULL)
2725 goto out;
2726 acl->cached = 1;
2727 memcpy(acl->data, buf, acl_len);
2728 } else {
2729 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2730 if (acl == NULL)
2731 goto out;
2732 acl->cached = 0;
2733 }
2734 acl->len = acl_len;
2735out:
2736 nfs4_set_cached_acl(inode, acl);
2737}
2738
16b4289c 2739static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2740{
aa1870af
BF
2741 struct page *pages[NFS4ACL_MAXPAGES];
2742 struct nfs_getaclargs args = {
2743 .fh = NFS_FH(inode),
2744 .acl_pages = pages,
2745 .acl_len = buflen,
2746 };
2747 size_t resp_len = buflen;
e50a1c2e 2748 void *resp_buf;
aa1870af
BF
2749 struct rpc_message msg = {
2750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2751 .rpc_argp = &args,
2752 .rpc_resp = &resp_len,
2753 };
e50a1c2e 2754 struct page *localpage = NULL;
aa1870af
BF
2755 int ret;
2756
e50a1c2e
BF
2757 if (buflen < PAGE_SIZE) {
2758 /* As long as we're doing a round trip to the server anyway,
2759 * let's be prepared for a page of acl data. */
2760 localpage = alloc_page(GFP_KERNEL);
2761 resp_buf = page_address(localpage);
2762 if (localpage == NULL)
2763 return -ENOMEM;
2764 args.acl_pages[0] = localpage;
2765 args.acl_pgbase = 0;
1d95db8e 2766 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF
2767 } else {
2768 resp_buf = buf;
2769 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2770 }
aa1870af 2771 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF
2772 if (ret)
2773 goto out_free;
2774 if (resp_len > args.acl_len)
2775 nfs4_write_cached_acl(inode, NULL, resp_len);
2776 else
2777 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2778 if (buf) {
2779 ret = -ERANGE;
2780 if (resp_len > buflen)
2781 goto out_free;
2782 if (localpage)
2783 memcpy(buf, resp_buf, resp_len);
2784 }
2785 ret = resp_len;
2786out_free:
2787 if (localpage)
2788 __free_page(localpage);
aa1870af
BF
2789 return ret;
2790}
2791
16b4289c
TM
2792static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2793{
2794 struct nfs4_exception exception = { };
2795 ssize_t ret;
2796 do {
2797 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2798 if (ret >= 0)
2799 break;
2800 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2801 } while (exception.retry);
2802 return ret;
2803}
2804
e50a1c2e
BF
2805static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2806{
2807 struct nfs_server *server = NFS_SERVER(inode);
2808 int ret;
2809
2810 if (!nfs4_server_supports_acls(server))
2811 return -EOPNOTSUPP;
2812 ret = nfs_revalidate_inode(server, inode);
2813 if (ret < 0)
2814 return ret;
f41f7418
TM
2815 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2816 nfs_zap_acl_cache(inode);
e50a1c2e
BF
2817 ret = nfs4_read_cached_acl(inode, buf, buflen);
2818 if (ret != -ENOENT)
2819 return ret;
2820 return nfs4_get_acl_uncached(inode, buf, buflen);
2821}
2822
16b4289c 2823static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF
2824{
2825 struct nfs_server *server = NFS_SERVER(inode);
2826 struct page *pages[NFS4ACL_MAXPAGES];
2827 struct nfs_setaclargs arg = {
2828 .fh = NFS_FH(inode),
2829 .acl_pages = pages,
2830 .acl_len = buflen,
2831 };
2832 struct rpc_message msg = {
2833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2834 .rpc_argp = &arg,
2835 .rpc_resp = NULL,
2836 };
2837 int ret;
2838
2839 if (!nfs4_server_supports_acls(server))
2840 return -EOPNOTSUPP;
642ac549 2841 nfs_inode_return_delegation(inode);
4b580ee3 2842 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2843 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
f41f7418
TM
2844 nfs_access_zap_cache(inode);
2845 nfs_zap_acl_cache(inode);
4b580ee3
BF
2846 return ret;
2847}
2848
16b4289c
TM
2849static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2850{
2851 struct nfs4_exception exception = { };
2852 int err;
2853 do {
2854 err = nfs4_handle_exception(NFS_SERVER(inode),
2855 __nfs4_proc_set_acl(inode, buf, buflen),
2856 &exception);
2857 } while (exception.retry);
2858 return err;
2859}
2860
1da177e4 2861static int
9e33bed5 2862nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 2863{
7539bbab 2864 struct nfs_client *clp = server->nfs_client;
1da177e4
LT
2865
2866 if (!clp || task->tk_status >= 0)
2867 return 0;
2868 switch(task->tk_status) {
9e33bed5
TM
2869 case -NFS4ERR_ADMIN_REVOKED:
2870 case -NFS4ERR_BAD_STATEID:
2871 case -NFS4ERR_OPENMODE:
2872 if (state == NULL)
2873 break;
2874 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT
2875 case -NFS4ERR_STALE_CLIENTID:
2876 case -NFS4ERR_STALE_STATEID:
2877 case -NFS4ERR_EXPIRED:
5d00837b 2878 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 2879 nfs4_schedule_state_recovery(clp);
e005e804 2880 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 2881 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT
2882 task->tk_status = 0;
2883 return -EAGAIN;
1da177e4 2884 case -NFS4ERR_DELAY:
2e96d286 2885 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 2886 case -NFS4ERR_GRACE:
1da177e4
LT
2887 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2888 task->tk_status = 0;
2889 return -EAGAIN;
2890 case -NFS4ERR_OLD_STATEID:
2891 task->tk_status = 0;
2892 return -EAGAIN;
2893 }
2894 task->tk_status = nfs4_map_errors(task->tk_status);
2895 return 0;
2896}
2897
adfa6f98 2898int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT
2899{
2900 nfs4_verifier sc_verifier;
2901 struct nfs4_setclientid setclientid = {
2902 .sc_verifier = &sc_verifier,
2903 .sc_prog = program,
2904 };
2905 struct rpc_message msg = {
2906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2907 .rpc_argp = &setclientid,
2908 .rpc_resp = clp,
286d7d6a 2909 .rpc_cred = cred,
1da177e4 2910 };
bc4785cd 2911 __be32 *p;
1da177e4
LT
2912 int loop = 0;
2913 int status;
2914
bc4785cd 2915 p = (__be32*)sc_verifier.data;
1da177e4
LT
2916 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2917 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2918
2919 for(;;) {
2920 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 2921 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL
2922 clp->cl_ipaddr,
2923 rpc_peeraddr2str(clp->cl_rpcclient,
2924 RPC_DISPLAY_ADDR),
69dd716c
TM
2925 rpc_peeraddr2str(clp->cl_rpcclient,
2926 RPC_DISPLAY_PROTO),
78ea323b 2927 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT
2928 clp->cl_id_uniquifier);
2929 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL
2930 sizeof(setclientid.sc_netid),
2931 rpc_peeraddr2str(clp->cl_rpcclient,
2932 RPC_DISPLAY_NETID));
1da177e4 2933 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 2934 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT
2935 clp->cl_ipaddr, port >> 8, port & 255);
2936
2937 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2938 if (status != -NFS4ERR_CLID_INUSE)
2939 break;
2940 if (signalled())
2941 break;
2942 if (loop++ & 1)
2943 ssleep(clp->cl_lease_time + 1);
2944 else
2945 if (++clp->cl_id_uniquifier == 0)
2946 break;
2947 }
2948 return status;
2949}
2950
adfa6f98 2951static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT
2952{
2953 struct nfs_fsinfo fsinfo;
2954 struct rpc_message msg = {
2955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2956 .rpc_argp = clp,
2957 .rpc_resp = &fsinfo,
286d7d6a 2958 .rpc_cred = cred,
1da177e4
LT
2959 };
2960 unsigned long now;
2961 int status;
2962
2963 now = jiffies;
2964 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2965 if (status == 0) {
2966 spin_lock(&clp->cl_lock);
2967 clp->cl_lease_time = fsinfo.lease_time * HZ;
2968 clp->cl_last_renewal = now;
2969 spin_unlock(&clp->cl_lock);
2970 }
2971 return status;
2972}
2973
adfa6f98 2974int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 2975{
77e03677 2976 long timeout = 0;
51581f3b
TM
2977 int err;
2978 do {
2979 err = _nfs4_proc_setclientid_confirm(clp, cred);
2980 switch (err) {
2981 case 0:
2982 return err;
2983 case -NFS4ERR_RESOURCE:
2984 /* The IBM lawyers misread another document! */
2985 case -NFS4ERR_DELAY:
2986 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2987 }
2988 } while (err == 0);
2989 return err;
2990}
2991
fe650407
TM
2992struct nfs4_delegreturndata {
2993 struct nfs4_delegreturnargs args;
fa178f29 2994 struct nfs4_delegreturnres res;
fe650407
TM
2995 struct nfs_fh fh;
2996 nfs4_stateid stateid;
26e976a8 2997 unsigned long timestamp;
fa178f29 2998 struct nfs_fattr fattr;
fe650407
TM
2999 int rpc_status;
3000};
3001
fe650407
TM
3002static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3003{
3004 struct nfs4_delegreturndata *data = calldata;
3005 data->rpc_status = task->tk_status;
26e976a8 3006 if (data->rpc_status == 0)
fa178f29 3007 renew_lease(data->res.server, data->timestamp);
fe650407
TM
3008}
3009
3010static void nfs4_delegreturn_release(void *calldata)
3011{
fe650407
TM
3012 kfree(calldata);
3013}
3014
c8d149f3 3015static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM
3016 .rpc_call_done = nfs4_delegreturn_done,
3017 .rpc_release = nfs4_delegreturn_release,
3018};
3019
e6f81075 3020static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM
3021{
3022 struct nfs4_delegreturndata *data;
fa178f29 3023 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3024 struct rpc_task *task;
5138fde0
TM
3025 struct rpc_message msg = {
3026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3027 .rpc_cred = cred,
3028 };
c970aa85
TM
3029 struct rpc_task_setup task_setup_data = {
3030 .rpc_client = server->client,
5138fde0 3031 .rpc_message = &msg,
c970aa85
TM
3032 .callback_ops = &nfs4_delegreturn_ops,
3033 .flags = RPC_TASK_ASYNC,
3034 };
e6f81075 3035 int status = 0;
fe650407
TM
3036
3037 data = kmalloc(sizeof(*data), GFP_KERNEL);
3038 if (data == NULL)
3039 return -ENOMEM;
3040 data->args.fhandle = &data->fh;
3041 data->args.stateid = &data->stateid;
fa178f29 3042 data->args.bitmask = server->attr_bitmask;
fe650407
TM
3043 nfs_copy_fh(&data->fh, NFS_FH(inode));
3044 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM
3045 data->res.fattr = &data->fattr;
3046 data->res.server = server;
5138fde0 3047 nfs_fattr_init(data->res.fattr);
26e976a8 3048 data->timestamp = jiffies;
fe650407
TM
3049 data->rpc_status = 0;
3050
c970aa85 3051 task_setup_data.callback_data = data;
5138fde0
TM
3052 msg.rpc_argp = &data->args,
3053 msg.rpc_resp = &data->res,
c970aa85 3054 task = rpc_run_task(&task_setup_data);
7a1218a2 3055 if (IS_ERR(task))
fe650407 3056 return PTR_ERR(task);
e6f81075
TM
3057 if (!issync)
3058 goto out;
fe650407 3059 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM
3060 if (status != 0)
3061 goto out;
3062 status = data->rpc_status;
3063 if (status != 0)
3064 goto out;
3065 nfs_refresh_inode(inode, &data->fattr);
3066out:
e6b3c4db 3067 rpc_put_task(task);
fe650407 3068 return status;
1da177e4
LT
3069}
3070
e6f81075 3071int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT
3072{
3073 struct nfs_server *server = NFS_SERVER(inode);
3074 struct nfs4_exception exception = { };
3075 int err;
3076 do {
e6f81075 3077 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT
3078 switch (err) {
3079 case -NFS4ERR_STALE_STATEID:
3080 case -NFS4ERR_EXPIRED:
1da177e4
LT
3081 case 0:
3082 return 0;
3083 }
3084 err = nfs4_handle_exception(server, err, &exception);
3085 } while (exception.retry);
3086 return err;
3087}
3088
3089#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3090#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3091
3092/*
3093 * sleep, with exponential backoff, and retry the LOCK operation.
3094 */
3095static unsigned long
3096nfs4_set_lock_task_retry(unsigned long timeout)
3097{
150030b7 3098 schedule_timeout_killable(timeout);
1da177e4
LT
3099 timeout <<= 1;
3100 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3101 return NFS4_LOCK_MAXTIMEOUT;
3102 return timeout;
3103}
3104
1da177e4
LT
3105static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3106{
3107 struct inode *inode = state->inode;
3108 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3109 struct nfs_client *clp = server->nfs_client;
911d1aaf 3110 struct nfs_lockt_args arg = {
1da177e4 3111 .fh = NFS_FH(inode),
911d1aaf 3112 .fl = request,
1da177e4 3113 };
911d1aaf
TM
3114 struct nfs_lockt_res res = {
3115 .denied = request,
1da177e4
LT
3116 };
3117 struct rpc_message msg = {
3118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3119 .rpc_argp = &arg,
3120 .rpc_resp = &res,
3121 .rpc_cred = state->owner->so_cred,
3122 };
1da177e4
LT
3123 struct nfs4_lock_state *lsp;
3124 int status;
3125
911d1aaf 3126 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM
3127 status = nfs4_set_lock_state(state, request);
3128 if (status != 0)
3129 goto out;
3130 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3131 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3132 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM
3133 switch (status) {
3134 case 0:
3135 request->fl_type = F_UNLCK;
3136 break;
3137 case -NFS4ERR_DENIED:
3138 status = 0;
1da177e4 3139 }
70cc6487 3140 request->fl_ops->fl_release_private(request);
8d0a8a9d 3141out:
1da177e4
LT
3142 return status;
3143}
3144
3145static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3146{
3147 struct nfs4_exception exception = { };
3148 int err;
3149
3150 do {
3151 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3152 _nfs4_proc_getlk(state, cmd, request),
3153 &exception);
3154 } while (exception.retry);
3155 return err;
3156}
3157
3158static int do_vfs_lock(struct file *file, struct file_lock *fl)
3159{
3160 int res = 0;
3161 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3162 case FL_POSIX:
3163 res = posix_lock_file_wait(file, fl);
3164 break;
3165 case FL_FLOCK:
3166 res = flock_lock_file_wait(file, fl);
3167 break;
3168 default:
3169 BUG();
3170 }
1da177e4
LT
3171 return res;
3172}
3173
faf5f49c 3174struct nfs4_unlockdata {
911d1aaf
TM
3175 struct nfs_locku_args arg;
3176 struct nfs_locku_res res;
faf5f49c
TM
3177 struct nfs4_lock_state *lsp;
3178 struct nfs_open_context *ctx;
911d1aaf
TM
3179 struct file_lock fl;
3180 const struct nfs_server *server;
26e976a8 3181 unsigned long timestamp;
faf5f49c
TM
3182};
3183
911d1aaf
TM
3184static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3185 struct nfs_open_context *ctx,
3186 struct nfs4_lock_state *lsp,
3187 struct nfs_seqid *seqid)
3188{
3189 struct nfs4_unlockdata *p;
3190 struct inode *inode = lsp->ls_state->inode;
3191
3192 p = kmalloc(sizeof(*p), GFP_KERNEL);
3193 if (p == NULL)
3194 return NULL;
3195 p->arg.fh = NFS_FH(inode);
3196 p->arg.fl = &p->fl;
3197 p->arg.seqid = seqid;
c1d51931 3198 p->res.seqid = seqid;
911d1aaf
TM
3199 p->arg.stateid = &lsp->ls_stateid;
3200 p->lsp = lsp;
3201 atomic_inc(&lsp->ls_count);
3202 /* Ensure we don't close file until we're done freeing locks! */
3203 p->ctx = get_nfs_open_context(ctx);
3204 memcpy(&p->fl, fl, sizeof(p->fl));
3205 p->server = NFS_SERVER(inode);
3206 return p;
3207}
3208
06f814a3 3209static void nfs4_locku_release_calldata(void *data)
faf5f49c 3210{
963d8fe5 3211 struct nfs4_unlockdata *calldata = data;
911d1aaf 3212 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM
3213 nfs4_put_lock_state(calldata->lsp);
3214 put_nfs_open_context(calldata->ctx);
3215 kfree(calldata);
faf5f49c
TM
3216}
3217
963d8fe5 3218static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3219{
963d8fe5 3220 struct nfs4_unlockdata *calldata = data;
faf5f49c 3221
06f814a3
TM
3222 if (RPC_ASSASSINATED(task))
3223 return;
faf5f49c
TM
3224 switch (task->tk_status) {
3225 case 0:
3226 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3227 calldata->res.stateid.data,
faf5f49c 3228 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3229 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3230 break;
9e33bed5
TM
3231 case -NFS4ERR_BAD_STATEID:
3232 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM
3233 case -NFS4ERR_STALE_STATEID:
3234 case -NFS4ERR_EXPIRED:
faf5f49c
TM
3235 break;
3236 default:
9e33bed5 3237 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
faf5f49c 3238 rpc_restart_call(task);
faf5f49c 3239 }
faf5f49c
TM
3240}
3241
4ce70ada 3242static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3243{
4ce70ada 3244 struct nfs4_unlockdata *calldata = data;
faf5f49c 3245
911d1aaf 3246 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM
3247 return;
3248 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM
3249 /* Note: exit _without_ running nfs4_locku_done */
3250 task->tk_action = NULL;
faf5f49c
TM
3251 return;
3252 }
26e976a8 3253 calldata->timestamp = jiffies;
5138fde0 3254 rpc_call_start(task);
faf5f49c
TM
3255}
3256
963d8fe5 3257static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3258 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3259 .rpc_call_done = nfs4_locku_done,
06f814a3 3260 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM
3261};
3262
a5d16a4d
TM
3263static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3264 struct nfs_open_context *ctx,
3265 struct nfs4_lock_state *lsp,
3266 struct nfs_seqid *seqid)
3267{
3268 struct nfs4_unlockdata *data;
5138fde0
TM
3269 struct rpc_message msg = {
3270 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3271 .rpc_cred = ctx->cred,
3272 };
c970aa85
TM
3273 struct rpc_task_setup task_setup_data = {
3274 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3275 .rpc_message = &msg,
c970aa85 3276 .callback_ops = &nfs4_locku_ops,
101070ca 3277 .workqueue = nfsiod_workqueue,
c970aa85
TM
3278 .flags = RPC_TASK_ASYNC,
3279 };
a5d16a4d 3280
137d6aca
FF
3281 /* Ensure this is an unlock - when canceling a lock, the
3282 * canceled lock is passed in, and it won't be an unlock.
3283 */
3284 fl->fl_type = F_UNLCK;
3285
a5d16a4d
TM
3286 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3287 if (data == NULL) {
3288 nfs_free_seqid(seqid);
3289 return ERR_PTR(-ENOMEM);
3290 }
3291
5138fde0
TM
3292 msg.rpc_argp = &data->arg,
3293 msg.rpc_resp = &data->res,
c970aa85
TM
3294 task_setup_data.callback_data = data;
3295 return rpc_run_task(&task_setup_data);
a5d16a4d
TM
3296}
3297
faf5f49c
TM
3298static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3299{
19e03c57 3300 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3301 struct nfs_seqid *seqid;
1da177e4 3302 struct nfs4_lock_state *lsp;
06f814a3
TM
3303 struct rpc_task *task;
3304 int status = 0;
536ff0f8 3305 unsigned char fl_flags = request->fl_flags;
faf5f49c 3306
8d0a8a9d 3307 status = nfs4_set_lock_state(state, request);
9b073574
TM
3308 /* Unlock _before_ we do the RPC call */
3309 request->fl_flags |= FL_EXISTS;
19e03c57
TM
3310 down_read(&nfsi->rwsem);
3311 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3312 up_read(&nfsi->rwsem);
9b073574 3313 goto out;
19e03c57
TM
3314 }
3315 up_read(&nfsi->rwsem);
8d0a8a9d 3316 if (status != 0)
9b073574
TM
3317 goto out;
3318 /* Is this a delegated lock? */
3319 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3320 goto out;
8d0a8a9d 3321 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3322 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3323 status = -ENOMEM;
911d1aaf 3324 if (seqid == NULL)
9b073574 3325 goto out;
cd3758e3 3326 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM
3327 status = PTR_ERR(task);
3328 if (IS_ERR(task))
9b073574 3329 goto out;
a5d16a4d 3330 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3331 rpc_put_task(task);
9b073574 3332out:
536ff0f8 3333 request->fl_flags = fl_flags;
1da177e4
LT
3334 return status;
3335}
3336
a5d16a4d
TM
3337struct nfs4_lockdata {
3338 struct nfs_lock_args arg;
3339 struct nfs_lock_res res;
3340 struct nfs4_lock_state *lsp;
3341 struct nfs_open_context *ctx;
3342 struct file_lock fl;
26e976a8 3343 unsigned long timestamp;
a5d16a4d
TM
3344 int rpc_status;
3345 int cancelled;
3346};
3347
3348static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3349 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3350{
a5d16a4d
TM
3351 struct nfs4_lockdata *p;
3352 struct inode *inode = lsp->ls_state->inode;
1da177e4 3353 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM
3354
3355 p = kzalloc(sizeof(*p), GFP_KERNEL);
3356 if (p == NULL)
3357 return NULL;
3358
3359 p->arg.fh = NFS_FH(inode);
3360 p->arg.fl = &p->fl;
2f74c0a0
TM
3361 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3362 if (p->arg.open_seqid == NULL)
3363 goto out_free;
a5d16a4d
TM
3364 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3365 if (p->arg.lock_seqid == NULL)
2f74c0a0 3366 goto out_free_seqid;
a5d16a4d 3367 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3368 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3369 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3370 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d
TM
3371 p->lsp = lsp;
3372 atomic_inc(&lsp->ls_count);
3373 p->ctx = get_nfs_open_context(ctx);
3374 memcpy(&p->fl, fl, sizeof(p->fl));
3375 return p;
2f74c0a0
TM
3376out_free_seqid:
3377 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM
3378out_free:
3379 kfree(p);
3380 return NULL;
3381}
3382
3383static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3384{
3385 struct nfs4_lockdata *data = calldata;
3386 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3387
3110ff80 3388 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM
3389 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3390 return;
a5d16a4d
TM
3391 /* Do we need to do an open_to_lock_owner? */
3392 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM
3393 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3394 return;
a5d16a4d
TM
3395 data->arg.open_stateid = &state->stateid;
3396 data->arg.new_lock_owner = 1;
c1d51931 3397 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM
3398 } else
3399 data->arg.new_lock_owner = 0;
26e976a8 3400 data->timestamp = jiffies;
5138fde0 3401 rpc_call_start(task);
3110ff80 3402 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM
3403}
3404
3405static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3406{
3407 struct nfs4_lockdata *data = calldata;
3408
3110ff80 3409 dprintk("%s: begin!\n", __func__);
a5d16a4d
TM
3410
3411 data->rpc_status = task->tk_status;
3412 if (RPC_ASSASSINATED(task))
3413 goto out;
3414 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM
3415 if (data->rpc_status == 0)
3416 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3417 else
3418 goto out;
3419 }
3420 if (data->rpc_status == 0) {
3421 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3422 sizeof(data->lsp->ls_stateid.data));
3423 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3424 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3425 }
a5d16a4d 3426out:
3110ff80 3427 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM
3428}
3429
3430static void nfs4_lock_release(void *calldata)
3431{
3432 struct nfs4_lockdata *data = calldata;
3433
3110ff80 3434 dprintk("%s: begin!\n", __func__);
2f74c0a0 3435 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM
3436 if (data->cancelled != 0) {
3437 struct rpc_task *task;
3438 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3439 data->arg.lock_seqid);
3440 if (!IS_ERR(task))
e6b3c4db 3441 rpc_put_task(task);
3110ff80 3442 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM
3443 } else
3444 nfs_free_seqid(data->arg.lock_seqid);
3445 nfs4_put_lock_state(data->lsp);
3446 put_nfs_open_context(data->ctx);
3447 kfree(data);
3110ff80 3448 dprintk("%s: done!\n", __func__);
a5d16a4d
TM
3449}
3450
3451static const struct rpc_call_ops nfs4_lock_ops = {
3452 .rpc_call_prepare = nfs4_lock_prepare,
3453 .rpc_call_done = nfs4_lock_done,
3454 .rpc_release = nfs4_lock_release,
3455};
3456
3457static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3458{
3459 struct nfs4_lockdata *data;
3460 struct rpc_task *task;
5138fde0
TM
3461 struct rpc_message msg = {
3462 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3463 .rpc_cred = state->owner->so_cred,
3464 };
c970aa85
TM
3465 struct rpc_task_setup task_setup_data = {
3466 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3467 .rpc_message = &msg,
c970aa85 3468 .callback_ops = &nfs4_lock_ops,
101070ca 3469 .workqueue = nfsiod_workqueue,
c970aa85
TM
3470 .flags = RPC_TASK_ASYNC,
3471 };
a5d16a4d
TM
3472 int ret;
3473
3110ff80 3474 dprintk("%s: begin!\n", __func__);
cd3758e3 3475 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM
3476 fl->fl_u.nfs4_fl.owner);
3477 if (data == NULL)
3478 return -ENOMEM;
3479 if (IS_SETLKW(cmd))
3480 data->arg.block = 1;
3481 if (reclaim != 0)
3482 data->arg.reclaim = 1;
5138fde0
TM
3483 msg.rpc_argp = &data->arg,
3484 msg.rpc_resp = &data->res,
c970aa85
TM
3485 task_setup_data.callback_data = data;
3486 task = rpc_run_task(&task_setup_data);
7a1218a2 3487 if (IS_ERR(task))
a5d16a4d 3488 return PTR_ERR(task);
a5d16a4d
TM
3489 ret = nfs4_wait_for_completion_rpc_task(task);
3490 if (ret == 0) {
3491 ret = data->rpc_status;
3492 if (ret == -NFS4ERR_DENIED)
3493 ret = -EAGAIN;
3494 } else
3495 data->cancelled = 1;
e6b3c4db 3496 rpc_put_task(task);
3110ff80 3497 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3498 return ret;
1da177e4
LT
3499}
3500
3501static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3502{
202b50dc
TM
3503 struct nfs_server *server = NFS_SERVER(state->inode);
3504 struct nfs4_exception exception = { };
3505 int err;
3506
3507 do {
42a2d13e
TM
3508 /* Cache the lock if possible... */
3509 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3510 return 0;
202b50dc
TM
3511 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3512 if (err != -NFS4ERR_DELAY)
3513 break;
3514 nfs4_handle_exception(server, err, &exception);
3515 } while (exception.retry);
3516 return err;
1da177e4
LT
3517}
3518
3519static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3520{
202b50dc
TM
3521 struct nfs_server *server = NFS_SERVER(state->inode);
3522 struct nfs4_exception exception = { };
3523 int err;
3524
6bfc93ef
TM
3525 err = nfs4_set_lock_state(state, request);
3526 if (err != 0)
3527 return err;
202b50dc 3528 do {
42a2d13e
TM
3529 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3530 return 0;
202b50dc
TM
3531 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3532 if (err != -NFS4ERR_DELAY)
3533 break;
3534 nfs4_handle_exception(server, err, &exception);
3535 } while (exception.retry);
3536 return err;
1da177e4
LT
3537}
3538
3539static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3540{
19e03c57 3541 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 3542 unsigned char fl_flags = request->fl_flags;
1da177e4
LT
3543 int status;
3544
6bfc93ef 3545 /* Is this a delegated open? */
6bfc93ef
TM
3546 status = nfs4_set_lock_state(state, request);
3547 if (status != 0)
3548 goto out;
01c3b861
TM
3549 request->fl_flags |= FL_ACCESS;
3550 status = do_vfs_lock(request->fl_file, request);
3551 if (status < 0)
3552 goto out;
19e03c57 3553 down_read(&nfsi->rwsem);
01c3b861 3554 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 3555 /* Yes: cache locks! */
01c3b861 3556 /* ...but avoid races with delegation recall... */
19e03c57
TM
3557 request->fl_flags = fl_flags & ~FL_SLEEP;
3558 status = do_vfs_lock(request->fl_file, request);
3559 goto out_unlock;
01c3b861 3560 }
6bfc93ef
TM
3561 status = _nfs4_do_setlk(state, cmd, request, 0);
3562 if (status != 0)
01c3b861 3563 goto out_unlock;
6bfc93ef 3564 /* Note: we always want to sleep here! */
01c3b861 3565 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 3566 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 3567 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 3568out_unlock:
19e03c57 3569 up_read(&nfsi->rwsem);
01c3b861
TM
3570out:
3571 request->fl_flags = fl_flags;
1da177e4
LT
3572 return status;
3573}
3574
3575static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3576{
3577 struct nfs4_exception exception = { };
3578 int err;
3579
3580 do {
3581 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3582 _nfs4_proc_setlk(state, cmd, request),
3583 &exception);
3584 } while (exception.retry);
3585 return err;
3586}
3587
3588static int
3589nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3590{
3591 struct nfs_open_context *ctx;
3592 struct nfs4_state *state;
3593 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3594 int status;
3595
3596 /* verify open state */
cd3758e3 3597 ctx = nfs_file_open_context(filp);
1da177e4
LT
3598 state = ctx->state;
3599
3600 if (request->fl_start < 0 || request->fl_end < 0)
3601 return -EINVAL;
3602
3603 if (IS_GETLK(cmd))
3604 return nfs4_proc_getlk(state, F_GETLK, request);
3605
3606 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3607 return -EINVAL;
3608
3609 if (request->fl_type == F_UNLCK)
3610 return nfs4_proc_unlck(state, cmd, request);
3611
3612 do {
3613 status = nfs4_proc_setlk(state, cmd, request);
3614 if ((status != -EAGAIN) || IS_SETLK(cmd))
3615 break;
3616 timeout = nfs4_set_lock_task_retry(timeout);
3617 status = -ERESTARTSYS;
3618 if (signalled())
3619 break;
3620 } while(status < 0);
1da177e4
LT
3621 return status;
3622}
3623
888e694c
TM
3624int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3625{
3626 struct nfs_server *server = NFS_SERVER(state->inode);
3627 struct nfs4_exception exception = { };
3628 int err;
3629
3630 err = nfs4_set_lock_state(state, fl);
3631 if (err != 0)
3632 goto out;
3633 do {
3634 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3635 if (err != -NFS4ERR_DELAY)
3636 break;
3637 err = nfs4_handle_exception(server, err, &exception);
3638 } while (exception.retry);
3639out:
3640 return err;
3641}
6b3b5496 3642
aa1870af
BF
3643#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3644
6b3b5496
BF
3645int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3646 size_t buflen, int flags)
3647{
4b580ee3
BF
3648 struct inode *inode = dentry->d_inode;
3649
3650 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3651 return -EOPNOTSUPP;
3652
4b580ee3 3653 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF
3654}
3655
3656/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3657 * and that's what we'll do for e.g. user attributes that haven't been set.
3658 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3659 * attributes in kernel-managed attribute namespaces. */
3660ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3661 size_t buflen)
3662{
aa1870af
BF
3663 struct inode *inode = dentry->d_inode;
3664
3665 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3666 return -EOPNOTSUPP;
3667
3668 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF
3669}
3670
3671ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3672{
aa1870af 3673 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3674
096455a2
BF
3675 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3676 return 0;
6b3b5496
BF
3677 if (buf && buflen < len)
3678 return -ERANGE;
3679 if (buf)
aa1870af
BF
3680 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3681 return len;
6b3b5496
BF
3682}
3683
69aaaae1
TM
3684static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
3685{
3686 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
3687 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
3688 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
3689 return;
3690
3691 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3692 NFS_ATTR_FATTR_NLINK;
3693 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3694 fattr->nlink = 2;
3695}
3696
56659e99 3697int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3698 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM
3699{
3700 struct nfs_server *server = NFS_SERVER(dir);
3701 u32 bitmask[2] = {
361e624f
MN
3702 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3703 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM
3704 };
3705 struct nfs4_fs_locations_arg args = {
3706 .dir_fh = NFS_FH(dir),
c228fd3a 3707 .name = name,
683b57b4
TM
3708 .page = page,
3709 .bitmask = bitmask,
3710 };
3711 struct rpc_message msg = {
3712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3713 .rpc_argp = &args,
7aaa0b3b 3714 .rpc_resp = fs_locations,
683b57b4
TM
3715 };
3716 int status;
3717
3110ff80 3718 dprintk("%s: start\n", __func__);
c228fd3a 3719 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3720 fs_locations->server = server;
830b8e33 3721 fs_locations->nlocations = 0;
683b57b4 3722 status = rpc_call_sync(server->client, &msg, 0);
69aaaae1 3723 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 3724 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM
3725 return status;
3726}
3727
1da177e4 3728struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
7eff03ae 3729 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 3730 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT
3731 .recover_open = nfs4_open_reclaim,
3732 .recover_lock = nfs4_lock_reclaim,
3733};
3734
b79a4a1b 3735struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
7eff03ae 3736 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 3737 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT
3738 .recover_open = nfs4_open_expired,
3739 .recover_lock = nfs4_lock_expired,
3740};
3741
92e1d5be 3742static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF
3743 .permission = nfs_permission,
3744 .getattr = nfs_getattr,
3745 .setattr = nfs_setattr,
3746 .getxattr = nfs4_getxattr,
3747 .setxattr = nfs4_setxattr,
3748 .listxattr = nfs4_listxattr,
3749};
3750
509de811 3751const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT
3752 .version = 4, /* protocol version */
3753 .dentry_ops = &nfs4_dentry_operations,
3754 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3755 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT
3756 .getroot = nfs4_proc_get_root,
3757 .getattr = nfs4_proc_getattr,
3758 .setattr = nfs4_proc_setattr,
2b3de441 3759 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT
3760 .lookup = nfs4_proc_lookup,
3761 .access = nfs4_proc_access,
3762 .readlink = nfs4_proc_readlink,
1da177e4
LT
3763 .create = nfs4_proc_create,
3764 .remove = nfs4_proc_remove,
3765 .unlink_setup = nfs4_proc_unlink_setup,
3766 .unlink_done = nfs4_proc_unlink_done,
3767 .rename = nfs4_proc_rename,
3768 .link = nfs4_proc_link,
3769 .symlink = nfs4_proc_symlink,
3770 .mkdir = nfs4_proc_mkdir,
3771 .rmdir = nfs4_proc_remove,
3772 .readdir = nfs4_proc_readdir,
3773 .mknod = nfs4_proc_mknod,
3774 .statfs = nfs4_proc_statfs,
3775 .fsinfo = nfs4_proc_fsinfo,
3776 .pathconf = nfs4_proc_pathconf,
e9326dca 3777 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT
3778 .decode_dirent = nfs4_decode_dirent,
3779 .read_setup = nfs4_proc_read_setup,
ec06c096 3780 .read_done = nfs4_read_done,
1da177e4 3781 .write_setup = nfs4_proc_write_setup,
788e7a89 3782 .write_done = nfs4_write_done,
1da177e4 3783 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3784 .commit_done = nfs4_commit_done,
1da177e4 3785 .lock = nfs4_proc_lock,
e50a1c2e 3786 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT
3787};
3788
3789/*
3790 * Local variables:
3791 * c-basic-offset: 8
3792 * End:
3793 */