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NFSv4: Clean up the asynchronous delegation return
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
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
LT		 69/* Prevent leaks of NFSv4 errors into userland */
70int nfs4_map_errors(int err)
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,
e56e0b78
TM		 326 struct nfs4_state_owner *sp, int flags,
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);
346 p->o_arg.open_flags = flags,
7539bbab 347 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 348 p->o_arg.id = sp->so_owner_id.id;
ad389da7 349 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 350 p->o_arg.server = server;
351 p->o_arg.bitmask = server->attr_bitmask;
352 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 353 if (flags & O_EXCL) {
354 u32 *s = (u32 *) p->o_arg.u.verifier.data;
355 s[0] = jiffies;
356 s[1] = current->pid;
357 } else if (flags & O_CREAT) {
358 p->o_arg.u.attrs = &p->attrs;
359 memcpy(&p->attrs, attrs, sizeof(p->attrs));
360 }
cdd4e68b
TM		 361 p->c_arg.fh = &p->o_res.fh;
362 p->c_arg.stateid = &p->o_res.stateid;
363 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 364 nfs4_init_opendata_res(p);
c6d00e63 365 kref_init(&p->kref);
e56e0b78
TM		 366 return p;
367err_free:
368 kfree(p);
369err:
370 dput(parent);
371 return NULL;
372}
373
c6d00e63 374static void nfs4_opendata_free(struct kref *kref)
e56e0b78 375{
c6d00e63
TM		 376 struct nfs4_opendata *p = container_of(kref,
377 struct nfs4_opendata, kref);
378
379 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 380 if (p->state != NULL)
381 nfs4_put_open_state(p->state);
c6d00e63
TM		 382 nfs4_put_state_owner(p->owner);
383 dput(p->dir);
31f31db1 384 path_put(&p->path);
c6d00e63
TM		 385 kfree(p);
386}
387
388static void nfs4_opendata_put(struct nfs4_opendata *p)
389{
390 if (p != NULL)
391 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 392}
393
06f814a3
TM		 394static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
395{
06f814a3
TM		 396 int ret;
397
06f814a3 398 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 399 return ret;
400}
401
6ee41268
TM		 402static int can_open_cached(struct nfs4_state *state, int mode)
403{
404 int ret = 0;
405 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
406 case FMODE_READ:
407 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 408 break;
409 case FMODE_WRITE:
410 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 411 break;
412 case FMODE_READ|FMODE_WRITE:
413 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
414 }
415 return ret;
416}
417
aac00a8d
TM		 418static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
419{
420 if ((delegation->type & open_flags) != open_flags)
421 return 0;
15c831bf 422 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d
TM		 423 return 0;
424 return 1;
425}
426
003707c7 427static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
e7616923
TM		 428{
429 switch (open_flags) {
430 case FMODE_WRITE:
431 state->n_wronly++;
432 break;
433 case FMODE_READ:
434 state->n_rdonly++;
435 break;
436 case FMODE_READ|FMODE_WRITE:
437 state->n_rdwr++;
438 }
003707c7
TM		 439 nfs4_state_set_mode_locked(state, state->state | open_flags);
440}
441
442static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
443{
444 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
445 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
446 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
447 switch (open_flags) {
448 case FMODE_READ:
449 set_bit(NFS_O_RDONLY_STATE, &state->flags);
450 break;
451 case FMODE_WRITE:
452 set_bit(NFS_O_WRONLY_STATE, &state->flags);
453 break;
454 case FMODE_READ|FMODE_WRITE:
455 set_bit(NFS_O_RDWR_STATE, &state->flags);
456 }
e7616923
TM		 457}
458
003707c7
TM		 459static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
460{
8bda4e4c 461 write_seqlock(&state->seqlock);
003707c7 462 nfs_set_open_stateid_locked(state, stateid, open_flags);
8bda4e4c 463 write_sequnlock(&state->seqlock);
003707c7
TM		 464}
465
34310430 466static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, int open_flags)
1da177e4 467{
8bda4e4c
TM		 468 /*
469 * Protect the call to nfs4_state_set_mode_locked and
470 * serialise the stateid update
471 */
472 write_seqlock(&state->seqlock);
003707c7
TM		 473 if (deleg_stateid != NULL) {
474 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
475 set_bit(NFS_DELEGATED_STATE, &state->flags);
476 }
477 if (open_stateid != NULL)
478 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
8bda4e4c
TM		 479 write_sequnlock(&state->seqlock);
480 spin_lock(&state->owner->so_lock);
e7616923 481 update_open_stateflags(state, open_flags);
ec073428 482 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 483}
484
34310430
TM		 485static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, int open_flags)
486{
487 struct nfs_inode *nfsi = NFS_I(state->inode);
488 struct nfs_delegation *deleg_cur;
489 int ret = 0;
490
491 open_flags &= (FMODE_READ|FMODE_WRITE);
492
493 rcu_read_lock();
494 deleg_cur = rcu_dereference(nfsi->delegation);
495 if (deleg_cur == NULL)
496 goto no_delegation;
497
498 spin_lock(&deleg_cur->lock);
499 if (nfsi->delegation != deleg_cur ||
500 (deleg_cur->type & open_flags) != open_flags)
501 goto no_delegation_unlock;
502
503 if (delegation == NULL)
504 delegation = &deleg_cur->stateid;
505 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
506 goto no_delegation_unlock;
507
508 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, open_flags);
509 ret = 1;
510no_delegation_unlock:
511 spin_unlock(&deleg_cur->lock);
512no_delegation:
513 rcu_read_unlock();
514
515 if (!ret && open_stateid != NULL) {
516 __update_open_stateid(state, open_stateid, NULL, open_flags);
517 ret = 1;
518 }
519
520 return ret;
521}
522
523
aac00a8d
TM		 524static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
525{
526 struct nfs_delegation *delegation;
527
528 rcu_read_lock();
529 delegation = rcu_dereference(NFS_I(inode)->delegation);
530 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
531 rcu_read_unlock();
532 return;
533 }
534 rcu_read_unlock();
535 nfs_inode_return_delegation(inode);
536}
537
6ee41268 538static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 539{
540 struct nfs4_state *state = opendata->state;
541 struct nfs_inode *nfsi = NFS_I(state->inode);
542 struct nfs_delegation *delegation;
543 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
544 nfs4_stateid stateid;
545 int ret = -EAGAIN;
546
aac00a8d 547 for (;;) {
6ee41268
TM		 548 if (can_open_cached(state, open_mode)) {
549 spin_lock(&state->owner->so_lock);
550 if (can_open_cached(state, open_mode)) {
551 update_open_stateflags(state, open_mode);
552 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 553 goto out_return_state;
554 }
555 spin_unlock(&state->owner->so_lock);
556 }
34310430
TM		 557 rcu_read_lock();
558 delegation = rcu_dereference(nfsi->delegation);
559 if (delegation == NULL ||
560 !can_open_delegated(delegation, open_mode)) {
561 rcu_read_unlock();
aac00a8d 562 break;
34310430 563 }
aac00a8d
TM		 564 /* Save the delegation */
565 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
566 rcu_read_unlock();
af22f94a 567 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 568 if (ret != 0)
569 goto out;
570 ret = -EAGAIN;
34310430
TM		 571
572 /* Try to update the stateid using the delegation */
573 if (update_open_stateid(state, NULL, &stateid, open_mode))
574 goto out_return_state;
aac00a8d 575 }
aac00a8d
TM		 576out:
577 return ERR_PTR(ret);
578out_return_state:
579 atomic_inc(&state->count);
580 return state;
581}
582
24ac23ab
TM		 583static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
584{
585 struct inode *inode;
586 struct nfs4_state *state = NULL;
003707c7 587 struct nfs_delegation *delegation;
1b370bc2 588 int ret;
24ac23ab 589
aac00a8d 590 if (!data->rpc_done) {
6ee41268 591 state = nfs4_try_open_cached(data);
aac00a8d
TM		 592 goto out;
593 }
594
1b370bc2 595 ret = -EAGAIN;
24ac23ab 596 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 597 goto err;
24ac23ab 598 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 599 ret = PTR_ERR(inode);
03f28e3a 600 if (IS_ERR(inode))
1b370bc2
TM		 601 goto err;
602 ret = -ENOMEM;
24ac23ab
TM		 603 state = nfs4_get_open_state(inode, data->owner);
604 if (state == NULL)
1b370bc2 605 goto err_put_inode;
549d6ed5 606 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 607 int delegation_flags = 0;
608
003707c7
TM		 609 rcu_read_lock();
610 delegation = rcu_dereference(NFS_I(inode)->delegation);
611 if (delegation)
612 delegation_flags = delegation->flags;
613 rcu_read_unlock();
15c831bf 614 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 615 nfs_inode_set_delegation(state->inode,
616 data->owner->so_cred,
617 &data->o_res);
618 else
619 nfs_inode_reclaim_delegation(state->inode,
620 data->owner->so_cred,
621 &data->o_res);
622 }
34310430
TM		 623
624 update_open_stateid(state, &data->o_res.stateid, NULL,
625 data->o_arg.open_flags);
24ac23ab 626 iput(inode);
aac00a8d 627out:
24ac23ab 628 return state;
1b370bc2
TM		 629err_put_inode:
630 iput(inode);
631err:
632 return ERR_PTR(ret);
24ac23ab
TM		 633}
634
864472e9
TM		 635static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
636{
637 struct nfs_inode *nfsi = NFS_I(state->inode);
638 struct nfs_open_context *ctx;
639
640 spin_lock(&state->inode->i_lock);
641 list_for_each_entry(ctx, &nfsi->open_files, list) {
642 if (ctx->state != state)
643 continue;
644 get_nfs_open_context(ctx);
645 spin_unlock(&state->inode->i_lock);
646 return ctx;
647 }
648 spin_unlock(&state->inode->i_lock);
649 return ERR_PTR(-ENOENT);
650}
651
6f220ed5
TM		 652static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
653{
654 struct nfs4_opendata *opendata;
655
656 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
657 if (opendata == NULL)
658 return ERR_PTR(-ENOMEM);
659 opendata->state = state;
660 atomic_inc(&state->count);
661 return opendata;
662}
663
2ced46c2 664static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
864472e9 665{
2ced46c2 666 struct nfs4_state *newstate;
864472e9
TM		 667 int ret;
668
669 opendata->o_arg.open_flags = openflags;
2ced46c2
TM		 670 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
671 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
672 nfs4_init_opendata_res(opendata);
864472e9
TM		 673 ret = _nfs4_proc_open(opendata);
674 if (ret != 0)
675 return ret;
2ced46c2 676 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 677 if (IS_ERR(newstate))
678 return PTR_ERR(newstate);
679 nfs4_close_state(&opendata->path, newstate, openflags);
2ced46c2 680 *res = newstate;
864472e9
TM		 681 return 0;
682}
683
684static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
685{
864472e9 686 struct nfs4_state *newstate;
864472e9
TM		 687 int ret;
688
689 /* memory barrier prior to reading state->n_* */
2ced46c2 690 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 691 smp_rmb();
692 if (state->n_rdwr != 0) {
2ced46c2 693 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 694 if (ret != 0)
695 return ret;
2ced46c2
TM		 696 if (newstate != state)
697 return -ESTALE;
864472e9
TM		 698 }
699 if (state->n_wronly != 0) {
2ced46c2 700 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 701 if (ret != 0)
702 return ret;
2ced46c2
TM		 703 if (newstate != state)
704 return -ESTALE;
864472e9
TM		 705 }
706 if (state->n_rdonly != 0) {
2ced46c2 707 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 708 if (ret != 0)
709 return ret;
2ced46c2
TM		 710 if (newstate != state)
711 return -ESTALE;
864472e9 712 }
1ac7e2fd
TM		 713 /*
714 * We may have performed cached opens for all three recoveries.
715 * Check if we need to update the current stateid.
716 */
717 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
718 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 719 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 720 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
721 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 722 write_sequnlock(&state->seqlock);
1ac7e2fd 723 }
864472e9
TM		 724 return 0;
725}
726
1da177e4
LT		 727/*
728 * OPEN_RECLAIM:
729 * reclaim state on the server after a reboot.
1da177e4 730 */
539cd03a 731static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 732{
1ac7e2fd 733 struct nfs_delegation *delegation;
864472e9
TM		 734 struct nfs4_opendata *opendata;
735 int delegation_type = 0;
1da177e4
LT		 736 int status;
737
6f220ed5
TM		 738 opendata = nfs4_open_recoverdata_alloc(ctx, state);
739 if (IS_ERR(opendata))
740 return PTR_ERR(opendata);
864472e9
TM		 741 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
742 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 743 rcu_read_lock();
744 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 745 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 746 delegation_type = delegation->type;
1ac7e2fd 747 rcu_read_unlock();
864472e9
TM		 748 opendata->o_arg.u.delegation_type = delegation_type;
749 status = nfs4_open_recover(opendata, state);
c6d00e63 750 nfs4_opendata_put(opendata);
1da177e4
LT		 751 return status;
752}
753
539cd03a 754static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 755{
756 struct nfs_server *server = NFS_SERVER(state->inode);
757 struct nfs4_exception exception = { };
758 int err;
759 do {
539cd03a 760 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 761 if (err != -NFS4ERR_DELAY)
762 break;
763 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 764 } while (exception.retry);
765 return err;
766}
767
864472e9
TM		 768static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
769{
770 struct nfs_open_context *ctx;
771 int ret;
772
773 ctx = nfs4_state_find_open_context(state);
774 if (IS_ERR(ctx))
775 return PTR_ERR(ctx);
539cd03a 776 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 777 put_nfs_open_context(ctx);
778 return ret;
779}
780
13437e12 781static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 782{
e56e0b78 783 struct nfs4_opendata *opendata;
864472e9 784 int ret;
1da177e4 785
6f220ed5
TM		 786 opendata = nfs4_open_recoverdata_alloc(ctx, state);
787 if (IS_ERR(opendata))
788 return PTR_ERR(opendata);
e56e0b78 789 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 790 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 791 sizeof(opendata->o_arg.u.delegation.data));
864472e9 792 ret = nfs4_open_recover(opendata, state);
c6d00e63 793 nfs4_opendata_put(opendata);
864472e9 794 return ret;
1da177e4
LT		 795}
796
13437e12 797int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 798{
799 struct nfs4_exception exception = { };
539cd03a 800 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 801 int err;
802 do {
13437e12 803 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 804 switch (err) {
805 case 0:
806 return err;
807 case -NFS4ERR_STALE_CLIENTID:
808 case -NFS4ERR_STALE_STATEID:
809 case -NFS4ERR_EXPIRED:
810 /* Don't recall a delegation if it was lost */
7539bbab 811 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 812 return err;
813 }
814 err = nfs4_handle_exception(server, err, &exception);
815 } while (exception.retry);
816 return err;
817}
818
cdd4e68b
TM		 819static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
820{
821 struct nfs4_opendata *data = calldata;
822
823 data->rpc_status = task->tk_status;
824 if (RPC_ASSASSINATED(task))
825 return;
26e976a8 826 if (data->rpc_status == 0) {
cdd4e68b
TM		 827 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
828 sizeof(data->o_res.stateid.data));
bb22629e 829 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 830 renew_lease(data->o_res.server, data->timestamp);
3e309914 831 data->rpc_done = 1;
26e976a8 832 }
cdd4e68b
TM		 833}
834
835static void nfs4_open_confirm_release(void *calldata)
836{
837 struct nfs4_opendata *data = calldata;
838 struct nfs4_state *state = NULL;
839
840 /* If this request hasn't been cancelled, do nothing */
841 if (data->cancelled == 0)
842 goto out_free;
843 /* In case of error, no cleanup! */
3e309914 844 if (!data->rpc_done)
cdd4e68b 845 goto out_free;
cdd4e68b 846 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 847 if (!IS_ERR(state))
4a35bd41 848 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
cdd4e68b 849out_free:
c6d00e63 850 nfs4_opendata_put(data);
cdd4e68b
TM		 851}
852
853static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 854 .rpc_call_done = nfs4_open_confirm_done,
855 .rpc_release = nfs4_open_confirm_release,
856};
857
858/*
859 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
860 */
861static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
862{
863 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
864 struct rpc_task *task;
5138fde0
TM		 865 struct rpc_message msg = {
866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
867 .rpc_argp = &data->c_arg,
868 .rpc_resp = &data->c_res,
869 .rpc_cred = data->owner->so_cred,
870 };
c970aa85
TM		 871 struct rpc_task_setup task_setup_data = {
872 .rpc_client = server->client,
5138fde0 873 .rpc_message = &msg,
c970aa85
TM		 874 .callback_ops = &nfs4_open_confirm_ops,
875 .callback_data = data,
101070ca 876 .workqueue = nfsiod_workqueue,
c970aa85
TM		 877 .flags = RPC_TASK_ASYNC,
878 };
1da177e4
LT		 879 int status;
880
c6d00e63 881 kref_get(&data->kref);
3e309914
TM		 882 data->rpc_done = 0;
883 data->rpc_status = 0;
5138fde0 884 data->timestamp = jiffies;
c970aa85 885 task = rpc_run_task(&task_setup_data);
7a1218a2 886 if (IS_ERR(task))
cdd4e68b 887 return PTR_ERR(task);
cdd4e68b
TM		 888 status = nfs4_wait_for_completion_rpc_task(task);
889 if (status != 0) {
890 data->cancelled = 1;
891 smp_wmb();
892 } else
893 status = data->rpc_status;
e6b3c4db 894 rpc_put_task(task);
1da177e4
LT		 895 return status;
896}
897
24ac23ab 898static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 899{
24ac23ab
TM		 900 struct nfs4_opendata *data = calldata;
901 struct nfs4_state_owner *sp = data->owner;
5138fde0 902
24ac23ab
TM		 903 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
904 return;
aac00a8d
TM		 905 /*
906 * Check if we still need to send an OPEN call, or if we can use
907 * a delegation instead.
908 */
909 if (data->state != NULL) {
910 struct nfs_delegation *delegation;
911
6ee41268
TM		 912 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
913 goto out_no_action;
aac00a8d
TM		 914 rcu_read_lock();
915 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
916 if (delegation != NULL &&
15c831bf 917 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 918 rcu_read_unlock();
6ee41268 919 goto out_no_action;
aac00a8d
TM		 920 }
921 rcu_read_unlock();
922 }
24ac23ab 923 /* Update sequence id. */
9f958ab8 924 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 925 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 926 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 927 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 928 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
929 }
26e976a8 930 data->timestamp = jiffies;
5138fde0 931 rpc_call_start(task);
6ee41268
TM		 932 return;
933out_no_action:
934 task->tk_action = NULL;
935
24ac23ab 936}
1da177e4 937
24ac23ab
TM		 938static void nfs4_open_done(struct rpc_task *task, void *calldata)
939{
940 struct nfs4_opendata *data = calldata;
1da177e4 941
24ac23ab
TM		 942 data->rpc_status = task->tk_status;
943 if (RPC_ASSASSINATED(task))
944 return;
945 if (task->tk_status == 0) {
946 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 947 case S_IFREG:
948 break;
949 case S_IFLNK:
24ac23ab 950 data->rpc_status = -ELOOP;
6f926b5b
TM		 951 break;
952 case S_IFDIR:
24ac23ab 953 data->rpc_status = -EISDIR;
6f926b5b
TM		 954 break;
955 default:
24ac23ab 956 data->rpc_status = -ENOTDIR;
6f926b5b 957 }
26e976a8 958 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 959 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
960 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 961 }
3e309914 962 data->rpc_done = 1;
24ac23ab 963}
6f926b5b 964
24ac23ab
TM		 965static void nfs4_open_release(void *calldata)
966{
967 struct nfs4_opendata *data = calldata;
968 struct nfs4_state *state = NULL;
969
970 /* If this request hasn't been cancelled, do nothing */
971 if (data->cancelled == 0)
972 goto out_free;
973 /* In case of error, no cleanup! */
3e309914 974 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 975 goto out_free;
976 /* In case we need an open_confirm, no cleanup! */
977 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
978 goto out_free;
24ac23ab 979 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 980 if (!IS_ERR(state))
4a35bd41 981 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
24ac23ab 982out_free:
c6d00e63 983 nfs4_opendata_put(data);
24ac23ab
TM		 984}
985
986static const struct rpc_call_ops nfs4_open_ops = {
987 .rpc_call_prepare = nfs4_open_prepare,
988 .rpc_call_done = nfs4_open_done,
989 .rpc_release = nfs4_open_release,
990};
991
992/*
993 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
994 */
995static int _nfs4_proc_open(struct nfs4_opendata *data)
996{
997 struct inode *dir = data->dir->d_inode;
998 struct nfs_server *server = NFS_SERVER(dir);
999 struct nfs_openargs *o_arg = &data->o_arg;
1000 struct nfs_openres *o_res = &data->o_res;
1001 struct rpc_task *task;
5138fde0
TM		 1002 struct rpc_message msg = {
1003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1004 .rpc_argp = o_arg,
1005 .rpc_resp = o_res,
1006 .rpc_cred = data->owner->so_cred,
1007 };
c970aa85
TM		 1008 struct rpc_task_setup task_setup_data = {
1009 .rpc_client = server->client,
5138fde0 1010 .rpc_message = &msg,
c970aa85
TM		 1011 .callback_ops = &nfs4_open_ops,
1012 .callback_data = data,
101070ca 1013 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1014 .flags = RPC_TASK_ASYNC,
1015 };
24ac23ab
TM		 1016 int status;
1017
c6d00e63 1018 kref_get(&data->kref);
3e309914
TM		 1019 data->rpc_done = 0;
1020 data->rpc_status = 0;
2ced46c2 1021 data->cancelled = 0;
c970aa85 1022 task = rpc_run_task(&task_setup_data);
7a1218a2 1023 if (IS_ERR(task))
24ac23ab 1024 return PTR_ERR(task);
24ac23ab
TM		 1025 status = nfs4_wait_for_completion_rpc_task(task);
1026 if (status != 0) {
1027 data->cancelled = 1;
1028 smp_wmb();
1029 } else
1030 status = data->rpc_status;
e6b3c4db 1031 rpc_put_task(task);
3e309914 1032 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1033 return status;
1034
9936781d
TM		 1035 if (o_res->fh.size == 0)
1036 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1037
56ae19f3
TM		 1038 if (o_arg->open_flags & O_CREAT) {
1039 update_changeattr(dir, &o_res->cinfo);
1040 nfs_post_op_update_inode(dir, o_res->dir_attr);
1041 } else
1042 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1043 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1044 status = _nfs4_proc_open_confirm(data);
1da177e4 1045 if (status != 0)
24ac23ab 1046 return status;
1da177e4
LT		 1047 }
1048 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1049 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1050 return 0;
1da177e4
LT		 1051}
1052
10afec90 1053static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1054{
7539bbab 1055 struct nfs_client *clp = server->nfs_client;
6b30954e 1056 int ret;
58d9714a 1057
6b30954e 1058 for (;;) {
65de872e 1059 ret = nfs4_wait_clnt_recover(clp);
6b30954e
TM		 1060 if (ret != 0)
1061 return ret;
e598d843
TM		 1062 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1063 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1064 break;
58d9714a 1065 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 1066 }
1067 return 0;
58d9714a
TM		 1068}
1069
1da177e4
LT		 1070/*
1071 * OPEN_EXPIRED:
1072 * reclaim state on the server after a network partition.
1073 * Assumes caller holds the appropriate lock
1074 */
539cd03a 1075static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1076{
e56e0b78 1077 struct nfs4_opendata *opendata;
864472e9 1078 int ret;
1da177e4 1079
6f220ed5
TM		 1080 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1081 if (IS_ERR(opendata))
1082 return PTR_ERR(opendata);
864472e9 1083 ret = nfs4_open_recover(opendata, state);
35d05778 1084 if (ret == -ESTALE)
539cd03a 1085 d_drop(ctx->path.dentry);
c6d00e63 1086 nfs4_opendata_put(opendata);
864472e9 1087 return ret;
1da177e4
LT		 1088}
1089
539cd03a 1090static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1091{
539cd03a 1092 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1093 struct nfs4_exception exception = { };
1094 int err;
1095
1096 do {
539cd03a 1097 err = _nfs4_open_expired(ctx, state);
202b50dc
TM		 1098 if (err == -NFS4ERR_DELAY)
1099 nfs4_handle_exception(server, err, &exception);
1100 } while (exception.retry);
1101 return err;
1102}
1103
1da177e4
LT		 1104static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1105{
1da177e4 1106 struct nfs_open_context *ctx;
864472e9 1107 int ret;
1da177e4 1108
864472e9
TM		 1109 ctx = nfs4_state_find_open_context(state);
1110 if (IS_ERR(ctx))
1111 return PTR_ERR(ctx);
539cd03a 1112 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1113 put_nfs_open_context(ctx);
1114 return ret;
1da177e4
LT		 1115}
1116
aa53ed54
JL		 1117/*
1118 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1119 * fields corresponding to attributes that were used to store the verifier.
1120 * Make sure we clobber those fields in the later setattr call
1121 */
1122static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1123{
1124 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1125 !(sattr->ia_valid & ATTR_ATIME_SET))
1126 sattr->ia_valid |= ATTR_ATIME;
1127
1128 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1129 !(sattr->ia_valid & ATTR_MTIME_SET))
1130 sattr->ia_valid |= ATTR_MTIME;
1131}
1132
1da177e4 1133/*
24ac23ab 1134 * Returns a referenced nfs4_state
1da177e4 1135 */
ad389da7 1136static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1137{
1138 struct nfs4_state_owner *sp;
1139 struct nfs4_state *state = NULL;
1140 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1141 struct nfs4_opendata *opendata;
aac00a8d 1142 int status;
1da177e4
LT		 1143
1144 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1145 status = -ENOMEM;
1146 if (!(sp = nfs4_get_state_owner(server, cred))) {
1147 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1148 goto out_err;
1149 }
58d9714a
TM		 1150 status = nfs4_recover_expired_lease(server);
1151 if (status != 0)
b4454fe1 1152 goto err_put_state_owner;
aac00a8d
TM		 1153 if (path->dentry->d_inode != NULL)
1154 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
58d9714a 1155 status = -ENOMEM;
ad389da7 1156 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
e56e0b78 1157 if (opendata == NULL)
95d35cb4 1158 goto err_put_state_owner;
1da177e4 1159
aac00a8d
TM		 1160 if (path->dentry->d_inode != NULL)
1161 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1162
24ac23ab 1163 status = _nfs4_proc_open(opendata);
1da177e4 1164 if (status != 0)
c6d00e63 1165 goto err_opendata_put;
1da177e4 1166
aa53ed54
JL		 1167 if (opendata->o_arg.open_flags & O_EXCL)
1168 nfs4_exclusive_attrset(opendata, sattr);
1169
24ac23ab 1170 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1171 status = PTR_ERR(state);
1172 if (IS_ERR(state))
c6d00e63 1173 goto err_opendata_put;
c6d00e63 1174 nfs4_opendata_put(opendata);
1da177e4 1175 nfs4_put_state_owner(sp);
1da177e4
LT		 1176 *res = state;
1177 return 0;
c6d00e63
TM		 1178err_opendata_put:
1179 nfs4_opendata_put(opendata);
e56e0b78
TM		 1180err_put_state_owner:
1181 nfs4_put_state_owner(sp);
1da177e4 1182out_err:
1da177e4
LT		 1183 *res = NULL;
1184 return status;
1185}
1186
1187
ad389da7 1188static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1189{
1190 struct nfs4_exception exception = { };
1191 struct nfs4_state *res;
1192 int status;
1193
1194 do {
ad389da7 1195 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1da177e4
LT		 1196 if (status == 0)
1197 break;
1198 /* NOTE: BAD_SEQID means the server and client disagree about the
1199 * book-keeping w.r.t. state-changing operations
1200 * (OPEN/CLOSE/LOCK/LOCKU...)
1201 * It is actually a sign of a bug on the client or on the server.
1202 *
1203 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1204 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1205 * have unhashed the old state_owner for us, and that we can
1206 * therefore safely retry using a new one. We should still warn
1207 * the user though...
1208 */
1209 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1210 printk(KERN_WARNING "NFS: v4 server %s "
1211 " returned a bad sequence-id error!\n",
1212 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1213 exception.retry = 1;
1214 continue;
1215 }
550f5747
TM		 1216 /*
1217 * BAD_STATEID on OPEN means that the server cancelled our
1218 * state before it received the OPEN_CONFIRM.
1219 * Recover by retrying the request as per the discussion
1220 * on Page 181 of RFC3530.
1221 */
1222 if (status == -NFS4ERR_BAD_STATEID) {
1223 exception.retry = 1;
1224 continue;
1225 }
aac00a8d
TM		 1226 if (status == -EAGAIN) {
1227 /* We must have found a delegation */
1228 exception.retry = 1;
1229 continue;
1230 }
1da177e4
LT		 1231 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1232 status, &exception));
1233 } while (exception.retry);
1234 return res;
1235}
1236
659bfcd6
TM		 1237static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1238 struct nfs_fattr *fattr, struct iattr *sattr,
1239 struct nfs4_state *state)
1da177e4 1240{
3e4f6290 1241 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1242 struct nfs_setattrargs arg = {
3e4f6290 1243 .fh = NFS_FH(inode),
1da177e4
LT		 1244 .iap = sattr,
1245 .server = server,
1246 .bitmask = server->attr_bitmask,
1247 };
1248 struct nfs_setattrres res = {
1249 .fattr = fattr,
1250 .server = server,
1251 };
1252 struct rpc_message msg = {
659bfcd6
TM		 1253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1254 .rpc_argp = &arg,
1255 .rpc_resp = &res,
1256 .rpc_cred = cred,
1da177e4 1257 };
26e976a8 1258 unsigned long timestamp = jiffies;
65e4308d 1259 int status;
1da177e4 1260
0e574af1 1261 nfs_fattr_init(fattr);
1da177e4 1262
3e4f6290
TM		 1263 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1264 /* Use that stateid */
1265 } else if (state != NULL) {
08e9eac4
TM		 1266 nfs4_copy_stateid(&arg.stateid, state, current->files);
1267 } else
1da177e4
LT		 1268 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1269
65e4308d 1270 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1271 if (status == 0 && state != NULL)
1272 renew_lease(server, timestamp);
65e4308d 1273 return status;
1da177e4
LT		 1274}
1275
659bfcd6
TM		 1276static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1277 struct nfs_fattr *fattr, struct iattr *sattr,
1278 struct nfs4_state *state)
1da177e4 1279{
3e4f6290 1280 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1281 struct nfs4_exception exception = { };
1282 int err;
1283 do {
1284 err = nfs4_handle_exception(server,
659bfcd6 1285 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1286 &exception);
1287 } while (exception.retry);
1288 return err;
1289}
1290
1291struct nfs4_closedata {
4a35bd41 1292 struct path path;
1da177e4
LT		 1293 struct inode *inode;
1294 struct nfs4_state *state;
1295 struct nfs_closeargs arg;
1296 struct nfs_closeres res;
516a6af6 1297 struct nfs_fattr fattr;
26e976a8 1298 unsigned long timestamp;
1da177e4
LT		 1299};
1300
963d8fe5 1301static void nfs4_free_closedata(void *data)
9512135d 1302{
963d8fe5
TM		 1303 struct nfs4_closedata *calldata = data;
1304 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1305
1306 nfs4_put_open_state(calldata->state);
1307 nfs_free_seqid(calldata->arg.seqid);
9512135d 1308 nfs4_put_state_owner(sp);
31f31db1 1309 path_put(&calldata->path);
9512135d
TM		 1310 kfree(calldata);
1311}
1312
963d8fe5 1313static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1314{
963d8fe5 1315 struct nfs4_closedata *calldata = data;
1da177e4 1316 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1317 struct nfs_server *server = NFS_SERVER(calldata->inode);
1318
4ce70ada
TM		 1319 if (RPC_ASSASSINATED(task))
1320 return;
1da177e4
LT		 1321 /* hmm. we are done with the inode, and in the process of freeing
1322 * the state_owner. we keep this around to process errors
1323 */
1da177e4
LT		 1324 switch (task->tk_status) {
1325 case 0:
45328c35 1326 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1327 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1328 break;
1329 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1330 case -NFS4ERR_OLD_STATEID:
1331 case -NFS4ERR_BAD_STATEID:
1da177e4 1332 case -NFS4ERR_EXPIRED:
9e33bed5
TM		 1333 if (calldata->arg.open_flags == 0)
1334 break;
1da177e4 1335 default:
9e33bed5 1336 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1da177e4
LT		 1337 rpc_restart_call(task);
1338 return;
1339 }
1340 }
516a6af6 1341 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1342}
1343
4ce70ada 1344static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1345{
4ce70ada 1346 struct nfs4_closedata *calldata = data;
9512135d 1347 struct nfs4_state *state = calldata->state;
003707c7 1348 int clear_rd, clear_wr, clear_rdwr;
9512135d 1349
963d8fe5 1350 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1351 return;
003707c7 1352
003707c7 1353 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1354 spin_lock(&state->owner->so_lock);
003707c7 1355 /* Calculate the change in open mode */
e7616923 1356 if (state->n_rdwr == 0) {
003707c7 1357 if (state->n_rdonly == 0) {
003707c7
TM		 1358 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1359 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1360 }
1361 if (state->n_wronly == 0) {
003707c7
TM		 1362 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1363 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1364 }
e7616923 1365 }
4cecb76f 1366 spin_unlock(&state->owner->so_lock);
003707c7 1367 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1368 /* Note: exit _without_ calling nfs4_close_done */
1369 task->tk_action = NULL;
9512135d
TM		 1370 return;
1371 }
516a6af6 1372 nfs_fattr_init(calldata->res.fattr);
45328c35 1373 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1374 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1375 calldata->arg.open_flags = FMODE_READ;
1376 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1377 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1378 calldata->arg.open_flags = FMODE_WRITE;
1379 }
26e976a8 1380 calldata->timestamp = jiffies;
5138fde0 1381 rpc_call_start(task);
1da177e4
LT		 1382}
1383
963d8fe5 1384static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1385 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1386 .rpc_call_done = nfs4_close_done,
1387 .rpc_release = nfs4_free_closedata,
1388};
1389
1da177e4
LT		 1390/*
1391 * It is possible for data to be read/written from a mem-mapped file
1392 * after the sys_close call (which hits the vfs layer as a flush).
1393 * This means that we can't safely call nfsv4 close on a file until
1394 * the inode is cleared. This in turn means that we are not good
1395 * NFSv4 citizens - we do not indicate to the server to update the file's
1396 * share state even when we are done with one of the three share
1397 * stateid's in the inode.
1398 *
1399 * NOTE: Caller must be holding the sp->so_owner semaphore!
1400 */
a49c3c77 1401int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1402{
4a35bd41 1403 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1404 struct nfs4_closedata *calldata;
b39e625b
TM		 1405 struct nfs4_state_owner *sp = state->owner;
1406 struct rpc_task *task;
5138fde0
TM		 1407 struct rpc_message msg = {
1408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1409 .rpc_cred = state->owner->so_cred,
1410 };
c970aa85
TM		 1411 struct rpc_task_setup task_setup_data = {
1412 .rpc_client = server->client,
5138fde0 1413 .rpc_message = &msg,
c970aa85 1414 .callback_ops = &nfs4_close_ops,
101070ca 1415 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1416 .flags = RPC_TASK_ASYNC,
1417 };
9512135d 1418 int status = -ENOMEM;
1da177e4 1419
9512135d 1420 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1421 if (calldata == NULL)
9512135d 1422 goto out;
4a35bd41 1423 calldata->inode = state->inode;
1da177e4 1424 calldata->state = state;
4a35bd41 1425 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1426 calldata->arg.stateid = &state->open_stateid;
1da177e4 1427 /* Serialization for the sequence id */
cee54fc9 1428 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1429 if (calldata->arg.seqid == NULL)
1430 goto out_free_calldata;
9e33bed5 1431 calldata->arg.open_flags = 0;
516a6af6
TM		 1432 calldata->arg.bitmask = server->attr_bitmask;
1433 calldata->res.fattr = &calldata->fattr;
c1d51931 1434 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1435 calldata->res.server = server;
4a35bd41
TM		 1436 calldata->path.mnt = mntget(path->mnt);
1437 calldata->path.dentry = dget(path->dentry);
9512135d 1438
5138fde0
TM		 1439 msg.rpc_argp = &calldata->arg,
1440 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1441 task_setup_data.callback_data = calldata;
1442 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1443 if (IS_ERR(task))
1444 return PTR_ERR(task);
a49c3c77
TM		 1445 status = 0;
1446 if (wait)
1447 status = rpc_wait_for_completion_task(task);
b39e625b 1448 rpc_put_task(task);
a49c3c77 1449 return status;
9512135d
TM		 1450out_free_calldata:
1451 kfree(calldata);
1452out:
b39e625b
TM		 1453 nfs4_put_open_state(state);
1454 nfs4_put_state_owner(sp);
9512135d 1455 return status;
1da177e4
LT		 1456}
1457
4a35bd41 1458static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM		 1459{
1460 struct file *filp;
1b45c46c 1461 int ret;
02a913a7 1462
1b45c46c
TM		 1463 /* If the open_intent is for execute, we have an extra check to make */
1464 if (nd->intent.open.flags & FMODE_EXEC) {
af22f94a 1465 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1466 state->owner->so_cred,
1467 nd->intent.open.flags);
1468 if (ret < 0)
1469 goto out_close;
1470 }
4a35bd41 1471 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1472 if (!IS_ERR(filp)) {
1473 struct nfs_open_context *ctx;
cd3758e3 1474 ctx = nfs_file_open_context(filp);
02a913a7 1475 ctx->state = state;
95cf959b
TM		 1476 return 0;
1477 }
1b45c46c
TM		 1478 ret = PTR_ERR(filp);
1479out_close:
a49c3c77 1480 nfs4_close_sync(path, state, nd->intent.open.flags);
1b45c46c 1481 return ret;
02a913a7
TM		 1482}
1483
1484struct dentry *
1da177e4
LT		 1485nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1486{
ad389da7 1487 struct path path = {
4ac91378 1488 .mnt = nd->path.mnt,
ad389da7
TM		 1489 .dentry = dentry,
1490 };
4ac91378 1491 struct dentry *parent;
1da177e4
LT		 1492 struct iattr attr;
1493 struct rpc_cred *cred;
1494 struct nfs4_state *state;
02a913a7 1495 struct dentry *res;
1da177e4
LT		 1496
1497 if (nd->flags & LOOKUP_CREATE) {
1498 attr.ia_mode = nd->intent.open.create_mode;
1499 attr.ia_valid = ATTR_MODE;
1500 if (!IS_POSIXACL(dir))
1501 attr.ia_mode &= ~current->fs->umask;
1502 } else {
1503 attr.ia_valid = 0;
1504 BUG_ON(nd->intent.open.flags & O_CREAT);
1505 }
1506
98a8e323 1507 cred = rpc_lookup_cred();
1da177e4 1508 if (IS_ERR(cred))
02a913a7 1509 return (struct dentry *)cred;
565277f6
TM		 1510 parent = dentry->d_parent;
1511 /* Protect against concurrent sillydeletes */
1512 nfs_block_sillyrename(parent);
ad389da7 1513 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1514 put_rpccred(cred);
02a913a7 1515 if (IS_ERR(state)) {
d75340cc 1516 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1517 d_add(dentry, NULL);
d75340cc
TM		 1518 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1519 }
565277f6 1520 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1521 return (struct dentry *)state;
1522 }
24ac23ab 1523 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1524 if (res != NULL)
deee9369 1525 path.dentry = res;
d75340cc 1526 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1527 nfs_unblock_sillyrename(parent);
4a35bd41 1528 nfs4_intent_set_file(nd, &path, state);
02a913a7 1529 return res;
1da177e4
LT		 1530}
1531
1532int
02a913a7 1533nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1534{
ad389da7 1535 struct path path = {
4ac91378 1536 .mnt = nd->path.mnt,
ad389da7
TM		 1537 .dentry = dentry,
1538 };
1da177e4
LT		 1539 struct rpc_cred *cred;
1540 struct nfs4_state *state;
1da177e4 1541
98a8e323 1542 cred = rpc_lookup_cred();
1da177e4
LT		 1543 if (IS_ERR(cred))
1544 return PTR_ERR(cred);
aac00a8d 1545 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1546 put_rpccred(cred);
02a913a7
TM		 1547 if (IS_ERR(state)) {
1548 switch (PTR_ERR(state)) {
1549 case -EPERM:
1550 case -EACCES:
1551 case -EDQUOT:
1552 case -ENOSPC:
1553 case -EROFS:
1554 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1555 return 1;
b87c0adf
CL		 1556 default:
1557 goto out_drop;
02a913a7 1558 }
02a913a7 1559 }
24ac23ab 1560 if (state->inode == dentry->d_inode) {
d75340cc 1561 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
4a35bd41 1562 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1563 return 1;
1564 }
a49c3c77 1565 nfs4_close_sync(&path, state, openflags);
02a913a7
TM		 1566out_drop:
1567 d_drop(dentry);
1da177e4
LT		 1568 return 0;
1569}
1570
1571
1572static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1573{
1574 struct nfs4_server_caps_res res = {};
1575 struct rpc_message msg = {
1576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1577 .rpc_argp = fhandle,
1578 .rpc_resp = &res,
1579 };
1580 int status;
1581
1582 status = rpc_call_sync(server->client, &msg, 0);
1583 if (status == 0) {
1584 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1585 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1586 server->caps |= NFS_CAP_ACLS;
1587 if (res.has_links != 0)
1588 server->caps |= NFS_CAP_HARDLINKS;
1589 if (res.has_symlinks != 0)
1590 server->caps |= NFS_CAP_SYMLINKS;
1591 server->acl_bitmask = res.acl_bitmask;
1592 }
1593 return status;
1594}
1595
55a97593 1596int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1597{
1598 struct nfs4_exception exception = { };
1599 int err;
1600 do {
1601 err = nfs4_handle_exception(server,
1602 _nfs4_server_capabilities(server, fhandle),
1603 &exception);
1604 } while (exception.retry);
1605 return err;
1606}
1607
1608static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1609 struct nfs_fsinfo *info)
1610{
1da177e4
LT		 1611 struct nfs4_lookup_root_arg args = {
1612 .bitmask = nfs4_fattr_bitmap,
1613 };
1614 struct nfs4_lookup_res res = {
1615 .server = server,
0e574af1 1616 .fattr = info->fattr,
1da177e4
LT		 1617 .fh = fhandle,
1618 };
1619 struct rpc_message msg = {
1620 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1621 .rpc_argp = &args,
1622 .rpc_resp = &res,
1623 };
0e574af1 1624 nfs_fattr_init(info->fattr);
1da177e4
LT		 1625 return rpc_call_sync(server->client, &msg, 0);
1626}
1627
1628static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1629 struct nfs_fsinfo *info)
1630{
1631 struct nfs4_exception exception = { };
1632 int err;
1633 do {
1634 err = nfs4_handle_exception(server,
1635 _nfs4_lookup_root(server, fhandle, info),
1636 &exception);
1637 } while (exception.retry);
1638 return err;
1639}
1640
54ceac45
DH		 1641/*
1642 * get the file handle for the "/" directory on the server
1643 */
1da177e4 1644static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1645 struct nfs_fsinfo *info)
1da177e4 1646{
1da177e4
LT		 1647 int status;
1648
1da177e4 1649 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1650 if (status == 0)
1651 status = nfs4_server_capabilities(server, fhandle);
1652 if (status == 0)
1653 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1654 return nfs4_map_errors(status);
1da177e4
LT		 1655}
1656
6b97fd3d
MN		 1657/*
1658 * Get locations and (maybe) other attributes of a referral.
1659 * Note that we'll actually follow the referral later when
1660 * we detect fsid mismatch in inode revalidation
1661 */
56659e99 1662static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1663{
1664 int status = -ENOMEM;
1665 struct page *page = NULL;
1666 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1667
1668 page = alloc_page(GFP_KERNEL);
1669 if (page == NULL)
1670 goto out;
1671 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1672 if (locations == NULL)
1673 goto out;
1674
c228fd3a 1675 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1676 if (status != 0)
1677 goto out;
1678 /* Make sure server returned a different fsid for the referral */
1679 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 1680 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 1681 status = -EIO;
1682 goto out;
1683 }
1684
1685 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1686 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1687 if (!fattr->mode)
1688 fattr->mode = S_IFDIR;
1689 memset(fhandle, 0, sizeof(struct nfs_fh));
1690out:
1691 if (page)
1692 __free_page(page);
1693 if (locations)
1694 kfree(locations);
1695 return status;
1696}
1697
1da177e4
LT		 1698static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1699{
1700 struct nfs4_getattr_arg args = {
1701 .fh = fhandle,
1702 .bitmask = server->attr_bitmask,
1703 };
1704 struct nfs4_getattr_res res = {
1705 .fattr = fattr,
1706 .server = server,
1707 };
1708 struct rpc_message msg = {
1709 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1710 .rpc_argp = &args,
1711 .rpc_resp = &res,
1712 };
1713
0e574af1 1714 nfs_fattr_init(fattr);
1da177e4
LT		 1715 return rpc_call_sync(server->client, &msg, 0);
1716}
1717
1718static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1719{
1720 struct nfs4_exception exception = { };
1721 int err;
1722 do {
1723 err = nfs4_handle_exception(server,
1724 _nfs4_proc_getattr(server, fhandle, fattr),
1725 &exception);
1726 } while (exception.retry);
1727 return err;
1728}
1729
1730/*
1731 * The file is not closed if it is opened due to the a request to change
1732 * the size of the file. The open call will not be needed once the
1733 * VFS layer lookup-intents are implemented.
1734 *
1735 * Close is called when the inode is destroyed.
1736 * If we haven't opened the file for O_WRONLY, we
1737 * need to in the size_change case to obtain a stateid.
1738 *
1739 * Got race?
1740 * Because OPEN is always done by name in nfsv4, it is
1741 * possible that we opened a different file by the same
1742 * name. We can recognize this race condition, but we
1743 * can't do anything about it besides returning an error.
1744 *
1745 * This will be fixed with VFS changes (lookup-intent).
1746 */
1747static int
1748nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1749 struct iattr *sattr)
1750{
08e9eac4 1751 struct inode *inode = dentry->d_inode;
659bfcd6 1752 struct rpc_cred *cred = NULL;
d530838b 1753 struct nfs4_state *state = NULL;
1da177e4
LT		 1754 int status;
1755
0e574af1 1756 nfs_fattr_init(fattr);
1da177e4 1757
d530838b 1758 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 1759 if (sattr->ia_valid & ATTR_FILE) {
1760 struct nfs_open_context *ctx;
1761
1762 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 1763 if (ctx) {
1764 cred = ctx->cred;
1765 state = ctx->state;
1766 }
659bfcd6 1767 }
08e9eac4 1768
659bfcd6 1769 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 1770 if (status == 0)
1771 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 1772 return status;
1773}
1774
56659e99
TM		 1775static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1776 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1777 struct nfs_fattr *fattr)
1778{
1779 int status;
1780 struct nfs4_lookup_arg args = {
1781 .bitmask = server->attr_bitmask,
1782 .dir_fh = dirfh,
1783 .name = name,
1784 };
1785 struct nfs4_lookup_res res = {
1786 .server = server,
1787 .fattr = fattr,
1788 .fh = fhandle,
1789 };
1790 struct rpc_message msg = {
1791 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1792 .rpc_argp = &args,
1793 .rpc_resp = &res,
1794 };
1795
1796 nfs_fattr_init(fattr);
1797
1798 dprintk("NFS call lookupfh %s\n", name->name);
1799 status = rpc_call_sync(server->client, &msg, 0);
1800 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1801 return status;
1802}
1803
1804static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1805 struct qstr *name, struct nfs_fh *fhandle,
1806 struct nfs_fattr *fattr)
1807{
1808 struct nfs4_exception exception = { };
1809 int err;
1810 do {
4e56e082
TM		 1811 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1812 /* FIXME: !!!! */
1813 if (err == -NFS4ERR_MOVED) {
1814 err = -EREMOTE;
1815 break;
1816 }
1817 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1818 } while (exception.retry);
1819 return err;
1820}
1821
56659e99 1822static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1823 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1824{
4e56e082 1825 int status;
1da177e4
LT		 1826
1827 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1828 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1829 if (status == -NFS4ERR_MOVED)
1830 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1831 dprintk("NFS reply lookup: %d\n", status);
1832 return status;
1833}
1834
1835static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1836{
1837 struct nfs4_exception exception = { };
1838 int err;
1839 do {
1840 err = nfs4_handle_exception(NFS_SERVER(dir),
1841 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1842 &exception);
1843 } while (exception.retry);
1844 return err;
1845}
1846
1847static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1848{
76b32999
TM		 1849 struct nfs_server *server = NFS_SERVER(inode);
1850 struct nfs_fattr fattr;
1da177e4
LT		 1851 struct nfs4_accessargs args = {
1852 .fh = NFS_FH(inode),
76b32999
TM		 1853 .bitmask = server->attr_bitmask,
1854 };
1855 struct nfs4_accessres res = {
1856 .server = server,
1857 .fattr = &fattr,
1da177e4 1858 };
1da177e4
LT		 1859 struct rpc_message msg = {
1860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1861 .rpc_argp = &args,
1862 .rpc_resp = &res,
1863 .rpc_cred = entry->cred,
1864 };
1865 int mode = entry->mask;
1866 int status;
1867
1868 /*
1869 * Determine which access bits we want to ask for...
1870 */
1871 if (mode & MAY_READ)
1872 args.access |= NFS4_ACCESS_READ;
1873 if (S_ISDIR(inode->i_mode)) {
1874 if (mode & MAY_WRITE)
1875 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1876 if (mode & MAY_EXEC)
1877 args.access |= NFS4_ACCESS_LOOKUP;
1878 } else {
1879 if (mode & MAY_WRITE)
1880 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1881 if (mode & MAY_EXEC)
1882 args.access |= NFS4_ACCESS_EXECUTE;
1883 }
76b32999 1884 nfs_fattr_init(&fattr);
1da177e4
LT		 1885 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1886 if (!status) {
1887 entry->mask = 0;
1888 if (res.access & NFS4_ACCESS_READ)
1889 entry->mask |= MAY_READ;
1890 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1891 entry->mask |= MAY_WRITE;
1892 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1893 entry->mask |= MAY_EXEC;
76b32999 1894 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1895 }
1896 return status;
1897}
1898
1899static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1900{
1901 struct nfs4_exception exception = { };
1902 int err;
1903 do {
1904 err = nfs4_handle_exception(NFS_SERVER(inode),
1905 _nfs4_proc_access(inode, entry),
1906 &exception);
1907 } while (exception.retry);
1908 return err;
1909}
1910
1911/*
1912 * TODO: For the time being, we don't try to get any attributes
1913 * along with any of the zero-copy operations READ, READDIR,
1914 * READLINK, WRITE.
1915 *
1916 * In the case of the first three, we want to put the GETATTR
1917 * after the read-type operation -- this is because it is hard
1918 * to predict the length of a GETATTR response in v4, and thus
1919 * align the READ data correctly. This means that the GETATTR
1920 * may end up partially falling into the page cache, and we should
1921 * shift it into the 'tail' of the xdr_buf before processing.
1922 * To do this efficiently, we need to know the total length
1923 * of data received, which doesn't seem to be available outside
1924 * of the RPC layer.
1925 *
1926 * In the case of WRITE, we also want to put the GETATTR after
1927 * the operation -- in this case because we want to make sure
1928 * we get the post-operation mtime and size. This means that
1929 * we can't use xdr_encode_pages() as written: we need a variant
1930 * of it which would leave room in the 'tail' iovec.
1931 *
1932 * Both of these changes to the XDR layer would in fact be quite
1933 * minor, but I decided to leave them for a subsequent patch.
1934 */
1935static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1936 unsigned int pgbase, unsigned int pglen)
1937{
1938 struct nfs4_readlink args = {
1939 .fh = NFS_FH(inode),
1940 .pgbase = pgbase,
1941 .pglen = pglen,
1942 .pages = &page,
1943 };
1944 struct rpc_message msg = {
1945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1946 .rpc_argp = &args,
1947 .rpc_resp = NULL,
1948 };
1949
1950 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1951}
1952
1953static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1954 unsigned int pgbase, unsigned int pglen)
1955{
1956 struct nfs4_exception exception = { };
1957 int err;
1958 do {
1959 err = nfs4_handle_exception(NFS_SERVER(inode),
1960 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1961 &exception);
1962 } while (exception.retry);
1963 return err;
1964}
1965
1da177e4
LT		 1966/*
1967 * Got race?
1968 * We will need to arrange for the VFS layer to provide an atomic open.
1969 * Until then, this create/open method is prone to inefficiency and race
1970 * conditions due to the lookup, create, and open VFS calls from sys_open()
1971 * placed on the wire.
1972 *
1973 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1974 * The file will be opened again in the subsequent VFS open call
1975 * (nfs4_proc_file_open).
1976 *
1977 * The open for read will just hang around to be used by any process that
1978 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1979 */
1980
1981static int
1982nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1983 int flags, struct nameidata *nd)
1da177e4 1984{
ad389da7 1985 struct path path = {
4ac91378 1986 .mnt = nd->path.mnt,
ad389da7
TM		 1987 .dentry = dentry,
1988 };
1da177e4
LT		 1989 struct nfs4_state *state;
1990 struct rpc_cred *cred;
1991 int status = 0;
1992
98a8e323 1993 cred = rpc_lookup_cred();
1da177e4
LT		 1994 if (IS_ERR(cred)) {
1995 status = PTR_ERR(cred);
1996 goto out;
1997 }
ad389da7 1998 state = nfs4_do_open(dir, &path, flags, sattr, cred);
d4d9cdcb 1999 d_drop(dentry);
1da177e4
LT		 2000 if (IS_ERR(state)) {
2001 status = PTR_ERR(state);
659bfcd6 2002 goto out_putcred;
1da177e4 2003 }
d4d9cdcb 2004 d_add(dentry, igrab(state->inode));
d75340cc 2005 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2006 if (flags & O_EXCL) {
2007 struct nfs_fattr fattr;
659bfcd6 2008 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2009 if (status == 0)
65e4308d 2010 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2011 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2012 }
ad389da7 2013 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
4a35bd41 2014 status = nfs4_intent_set_file(nd, &path, state);
02a913a7 2015 else
a49c3c77 2016 nfs4_close_sync(&path, state, flags);
659bfcd6
TM		 2017out_putcred:
2018 put_rpccred(cred);
1da177e4
LT		 2019out:
2020 return status;
2021}
2022
2023static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2024{
16e42959 2025 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2026 struct nfs_removeargs args = {
1da177e4 2027 .fh = NFS_FH(dir),
4fdc17b2
TM		 2028 .name.len = name->len,
2029 .name.name = name->name,
16e42959
TM		 2030 .bitmask = server->attr_bitmask,
2031 };
4fdc17b2 2032 struct nfs_removeres res = {
16e42959 2033 .server = server,
1da177e4 2034 };
1da177e4 2035 struct rpc_message msg = {
4fdc17b2
TM		 2036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2037 .rpc_argp = &args,
2038 .rpc_resp = &res,
1da177e4
LT		 2039 };
2040 int status;
2041
4fdc17b2 2042 nfs_fattr_init(&res.dir_attr);
16e42959
TM		 2043 status = rpc_call_sync(server->client, &msg, 0);
2044 if (status == 0) {
2045 update_changeattr(dir, &res.cinfo);
4fdc17b2 2046 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2047 }
1da177e4
LT		 2048 return status;
2049}
2050
2051static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2052{
2053 struct nfs4_exception exception = { };
2054 int err;
2055 do {
2056 err = nfs4_handle_exception(NFS_SERVER(dir),
2057 _nfs4_proc_remove(dir, name),
2058 &exception);
2059 } while (exception.retry);
2060 return err;
2061}
2062
e4eff1a6 2063static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2064{
e4eff1a6
TM		 2065 struct nfs_server *server = NFS_SERVER(dir);
2066 struct nfs_removeargs *args = msg->rpc_argp;
2067 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2068
e4eff1a6
TM		 2069 args->bitmask = server->attr_bitmask;
2070 res->server = server;
1da177e4 2071 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2072}
2073
e4eff1a6 2074static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2075{
e4eff1a6
TM		 2076 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2077
9e33bed5 2078 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2079 return 0;
2080 update_changeattr(dir, &res->cinfo);
2081 nfs_post_op_update_inode(dir, &res->dir_attr);
2082 return 1;
1da177e4
LT		 2083}
2084
2085static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2086 struct inode *new_dir, struct qstr *new_name)
2087{
6caf2c82 2088 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2089 struct nfs4_rename_arg arg = {
2090 .old_dir = NFS_FH(old_dir),
2091 .new_dir = NFS_FH(new_dir),
2092 .old_name = old_name,
2093 .new_name = new_name,
6caf2c82
TM		 2094 .bitmask = server->attr_bitmask,
2095 };
2096 struct nfs_fattr old_fattr, new_fattr;
2097 struct nfs4_rename_res res = {
2098 .server = server,
2099 .old_fattr = &old_fattr,
2100 .new_fattr = &new_fattr,
1da177e4 2101 };
1da177e4
LT		 2102 struct rpc_message msg = {
2103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2104 .rpc_argp = &arg,
2105 .rpc_resp = &res,
2106 };
2107 int status;
2108
6caf2c82
TM		 2109 nfs_fattr_init(res.old_fattr);
2110 nfs_fattr_init(res.new_fattr);
2111 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2112
2113 if (!status) {
2114 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2115 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2116 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2117 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2118 }
2119 return status;
2120}
2121
2122static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2123 struct inode *new_dir, struct qstr *new_name)
2124{
2125 struct nfs4_exception exception = { };
2126 int err;
2127 do {
2128 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2129 _nfs4_proc_rename(old_dir, old_name,
2130 new_dir, new_name),
2131 &exception);
2132 } while (exception.retry);
2133 return err;
2134}
2135
2136static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2137{
91ba2eee 2138 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2139 struct nfs4_link_arg arg = {
2140 .fh = NFS_FH(inode),
2141 .dir_fh = NFS_FH(dir),
2142 .name = name,
91ba2eee
TM		 2143 .bitmask = server->attr_bitmask,
2144 };
2145 struct nfs_fattr fattr, dir_attr;
2146 struct nfs4_link_res res = {
2147 .server = server,
2148 .fattr = &fattr,
2149 .dir_attr = &dir_attr,
1da177e4 2150 };
1da177e4
LT		 2151 struct rpc_message msg = {
2152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2153 .rpc_argp = &arg,
91ba2eee 2154 .rpc_resp = &res,
1da177e4
LT		 2155 };
2156 int status;
2157
91ba2eee
TM		 2158 nfs_fattr_init(res.fattr);
2159 nfs_fattr_init(res.dir_attr);
2160 status = rpc_call_sync(server->client, &msg, 0);
2161 if (!status) {
2162 update_changeattr(dir, &res.cinfo);
2163 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2164 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2165 }
1da177e4
LT		 2166
2167 return status;
2168}
2169
2170static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2171{
2172 struct nfs4_exception exception = { };
2173 int err;
2174 do {
2175 err = nfs4_handle_exception(NFS_SERVER(inode),
2176 _nfs4_proc_link(inode, dir, name),
2177 &exception);
2178 } while (exception.retry);
2179 return err;
2180}
2181
57dc9a57
TM		 2182struct nfs4_createdata {
2183 struct rpc_message msg;
2184 struct nfs4_create_arg arg;
2185 struct nfs4_create_res res;
2186 struct nfs_fh fh;
2187 struct nfs_fattr fattr;
2188 struct nfs_fattr dir_fattr;
2189};
2190
2191static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2192 struct qstr *name, struct iattr *sattr, u32 ftype)
2193{
2194 struct nfs4_createdata *data;
2195
2196 data = kzalloc(sizeof(*data), GFP_KERNEL);
2197 if (data != NULL) {
2198 struct nfs_server *server = NFS_SERVER(dir);
2199
2200 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2201 data->msg.rpc_argp = &data->arg;
2202 data->msg.rpc_resp = &data->res;
2203 data->arg.dir_fh = NFS_FH(dir);
2204 data->arg.server = server;
2205 data->arg.name = name;
2206 data->arg.attrs = sattr;
2207 data->arg.ftype = ftype;
2208 data->arg.bitmask = server->attr_bitmask;
2209 data->res.server = server;
2210 data->res.fh = &data->fh;
2211 data->res.fattr = &data->fattr;
2212 data->res.dir_fattr = &data->dir_fattr;
2213 nfs_fattr_init(data->res.fattr);
2214 nfs_fattr_init(data->res.dir_fattr);
2215 }
2216 return data;
2217}
2218
2219static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2220{
2221 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2222 if (status == 0) {
2223 update_changeattr(dir, &data->res.dir_cinfo);
2224 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2225 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2226 }
2227 return status;
2228}
2229
2230static void nfs4_free_createdata(struct nfs4_createdata *data)
2231{
2232 kfree(data);
2233}
2234
4f390c15 2235static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2236 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2237{
57dc9a57
TM		 2238 struct nfs4_createdata *data;
2239 int status = -ENAMETOOLONG;
1da177e4 2240
94a6d753 2241 if (len > NFS4_MAXPATHLEN)
57dc9a57 2242 goto out;
4f390c15 2243
57dc9a57
TM		 2244 status = -ENOMEM;
2245 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2246 if (data == NULL)
2247 goto out;
2248
2249 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2250 data->arg.u.symlink.pages = &page;
2251 data->arg.u.symlink.len = len;
1da177e4 2252
57dc9a57
TM		 2253 status = nfs4_do_create(dir, dentry, data);
2254
2255 nfs4_free_createdata(data);
2256out:
1da177e4
LT		 2257 return status;
2258}
2259
4f390c15 2260static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2261 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2262{
2263 struct nfs4_exception exception = { };
2264 int err;
2265 do {
2266 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2267 _nfs4_proc_symlink(dir, dentry, page,
2268 len, sattr),
1da177e4
LT		 2269 &exception);
2270 } while (exception.retry);
2271 return err;
2272}
2273
2274static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2275 struct iattr *sattr)
2276{
57dc9a57
TM		 2277 struct nfs4_createdata *data;
2278 int status = -ENOMEM;
1da177e4 2279
57dc9a57
TM		 2280 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2281 if (data == NULL)
2282 goto out;
2283
2284 status = nfs4_do_create(dir, dentry, data);
2285
2286 nfs4_free_createdata(data);
2287out:
1da177e4
LT		 2288 return status;
2289}
2290
2291static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2292 struct iattr *sattr)
2293{
2294 struct nfs4_exception exception = { };
2295 int err;
2296 do {
2297 err = nfs4_handle_exception(NFS_SERVER(dir),
2298 _nfs4_proc_mkdir(dir, dentry, sattr),
2299 &exception);
2300 } while (exception.retry);
2301 return err;
2302}
2303
2304static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2305 u64 cookie, struct page *page, unsigned int count, int plus)
2306{
2307 struct inode *dir = dentry->d_inode;
2308 struct nfs4_readdir_arg args = {
2309 .fh = NFS_FH(dir),
2310 .pages = &page,
2311 .pgbase = 0,
2312 .count = count,
2313 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2314 };
2315 struct nfs4_readdir_res res;
2316 struct rpc_message msg = {
2317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2318 .rpc_argp = &args,
2319 .rpc_resp = &res,
2320 .rpc_cred = cred,
2321 };
2322 int status;
2323
3110ff80 2324 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2325 dentry->d_parent->d_name.name,
2326 dentry->d_name.name,
2327 (unsigned long long)cookie);
1da177e4
LT		 2328 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2329 res.pgbase = args.pgbase;
2330 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2331 if (status == 0)
2332 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2333
2334 nfs_invalidate_atime(dir);
2335
3110ff80 2336 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2337 return status;
2338}
2339
2340static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2341 u64 cookie, struct page *page, unsigned int count, int plus)
2342{
2343 struct nfs4_exception exception = { };
2344 int err;
2345 do {
2346 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2347 _nfs4_proc_readdir(dentry, cred, cookie,
2348 page, count, plus),
2349 &exception);
2350 } while (exception.retry);
2351 return err;
2352}
2353
2354static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2355 struct iattr *sattr, dev_t rdev)
2356{
57dc9a57
TM		 2357 struct nfs4_createdata *data;
2358 int mode = sattr->ia_mode;
2359 int status = -ENOMEM;
1da177e4
LT		 2360
2361 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2362 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2363
2364 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2365 if (data == NULL)
2366 goto out;
2367
1da177e4 2368 if (S_ISFIFO(mode))
57dc9a57 2369 data->arg.ftype = NF4FIFO;
1da177e4 2370 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2371 data->arg.ftype = NF4BLK;
2372 data->arg.u.device.specdata1 = MAJOR(rdev);
2373 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2374 }
2375 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2376 data->arg.ftype = NF4CHR;
2377 data->arg.u.device.specdata1 = MAJOR(rdev);
2378 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2379 }
1da177e4 2380
57dc9a57
TM		 2381 status = nfs4_do_create(dir, dentry, data);
2382
2383 nfs4_free_createdata(data);
2384out:
1da177e4
LT		 2385 return status;
2386}
2387
2388static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2389 struct iattr *sattr, dev_t rdev)
2390{
2391 struct nfs4_exception exception = { };
2392 int err;
2393 do {
2394 err = nfs4_handle_exception(NFS_SERVER(dir),
2395 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2396 &exception);
2397 } while (exception.retry);
2398 return err;
2399}
2400
2401static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2402 struct nfs_fsstat *fsstat)
2403{
2404 struct nfs4_statfs_arg args = {
2405 .fh = fhandle,
2406 .bitmask = server->attr_bitmask,
2407 };
2408 struct rpc_message msg = {
2409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2410 .rpc_argp = &args,
2411 .rpc_resp = fsstat,
2412 };
2413
0e574af1 2414 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2415 return rpc_call_sync(server->client, &msg, 0);
2416}
2417
2418static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2419{
2420 struct nfs4_exception exception = { };
2421 int err;
2422 do {
2423 err = nfs4_handle_exception(server,
2424 _nfs4_proc_statfs(server, fhandle, fsstat),
2425 &exception);
2426 } while (exception.retry);
2427 return err;
2428}
2429
2430static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2431 struct nfs_fsinfo *fsinfo)
2432{
2433 struct nfs4_fsinfo_arg args = {
2434 .fh = fhandle,
2435 .bitmask = server->attr_bitmask,
2436 };
2437 struct rpc_message msg = {
2438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2439 .rpc_argp = &args,
2440 .rpc_resp = fsinfo,
2441 };
2442
2443 return rpc_call_sync(server->client, &msg, 0);
2444}
2445
2446static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2447{
2448 struct nfs4_exception exception = { };
2449 int err;
2450
2451 do {
2452 err = nfs4_handle_exception(server,
2453 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2454 &exception);
2455 } while (exception.retry);
2456 return err;
2457}
2458
2459static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2460{
0e574af1 2461 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2462 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2463}
2464
2465static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2466 struct nfs_pathconf *pathconf)
2467{
2468 struct nfs4_pathconf_arg args = {
2469 .fh = fhandle,
2470 .bitmask = server->attr_bitmask,
2471 };
2472 struct rpc_message msg = {
2473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2474 .rpc_argp = &args,
2475 .rpc_resp = pathconf,
2476 };
2477
2478 /* None of the pathconf attributes are mandatory to implement */
2479 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2480 memset(pathconf, 0, sizeof(*pathconf));
2481 return 0;
2482 }
2483
0e574af1 2484 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2485 return rpc_call_sync(server->client, &msg, 0);
2486}
2487
2488static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2489 struct nfs_pathconf *pathconf)
2490{
2491 struct nfs4_exception exception = { };
2492 int err;
2493
2494 do {
2495 err = nfs4_handle_exception(server,
2496 _nfs4_proc_pathconf(server, fhandle, pathconf),
2497 &exception);
2498 } while (exception.retry);
2499 return err;
2500}
2501
ec06c096 2502static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2503{
ec06c096 2504 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2505
9e33bed5 2506 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
1da177e4 2507 rpc_restart_call(task);
ec06c096 2508 return -EAGAIN;
1da177e4 2509 }
8850df99
TM		 2510
2511 nfs_invalidate_atime(data->inode);
1da177e4 2512 if (task->tk_status > 0)
ec06c096
TM		 2513 renew_lease(server, data->timestamp);
2514 return 0;
1da177e4
LT		 2515}
2516
bdc7f021 2517static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2518{
1da177e4 2519 data->timestamp = jiffies;
bdc7f021 2520 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2521}
2522
788e7a89 2523static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2524{
1da177e4
LT		 2525 struct inode *inode = data->inode;
2526
9e33bed5 2527 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
1da177e4 2528 rpc_restart_call(task);
788e7a89 2529 return -EAGAIN;
1da177e4 2530 }
4f9838c7 2531 if (task->tk_status >= 0) {
1da177e4 2532 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2533 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2534 }
788e7a89 2535 return 0;
1da177e4
LT		 2536}
2537
bdc7f021 2538static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2539{
bdc7f021
TM		 2540 struct nfs_server *server = NFS_SERVER(data->inode);
2541
4f9838c7
TM		 2542 data->args.bitmask = server->attr_bitmask;
2543 data->res.server = server;
1da177e4
LT		 2544 data->timestamp = jiffies;
2545
bdc7f021 2546 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2547}
2548
788e7a89 2549static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2550{
1da177e4
LT		 2551 struct inode *inode = data->inode;
2552
9e33bed5 2553 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
1da177e4 2554 rpc_restart_call(task);
788e7a89 2555 return -EAGAIN;
1da177e4 2556 }
9e08a3c5 2557 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2558 return 0;
1da177e4
LT		 2559}
2560
bdc7f021 2561static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2562{
788e7a89 2563 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2564
4f9838c7
TM		 2565 data->args.bitmask = server->attr_bitmask;
2566 data->res.server = server;
bdc7f021 2567 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2568}
2569
2570/*
2571 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2572 * standalone procedure for queueing an asynchronous RENEW.
2573 */
963d8fe5 2574static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2575{
adfa6f98 2576 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2577 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2578
2579 if (task->tk_status < 0) {
2580 switch (task->tk_status) {
2581 case -NFS4ERR_STALE_CLIENTID:
2582 case -NFS4ERR_EXPIRED:
2583 case -NFS4ERR_CB_PATH_DOWN:
2584 nfs4_schedule_state_recovery(clp);
2585 }
2586 return;
2587 }
2588 spin_lock(&clp->cl_lock);
2589 if (time_before(clp->cl_last_renewal,timestamp))
2590 clp->cl_last_renewal = timestamp;
2591 spin_unlock(&clp->cl_lock);
2592}
2593
963d8fe5
TM		 2594static const struct rpc_call_ops nfs4_renew_ops = {
2595 .rpc_call_done = nfs4_renew_done,
2596};
2597
adfa6f98 2598int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2599{
2600 struct rpc_message msg = {
2601 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2602 .rpc_argp = clp,
b4454fe1 2603 .rpc_cred = cred,
1da177e4
LT		 2604 };
2605
2606 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2607 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2608}
2609
adfa6f98 2610int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2611{
2612 struct rpc_message msg = {
2613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2614 .rpc_argp = clp,
b4454fe1 2615 .rpc_cred = cred,
1da177e4
LT		 2616 };
2617 unsigned long now = jiffies;
2618 int status;
2619
2620 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2621 if (status < 0)
2622 return status;
2623 spin_lock(&clp->cl_lock);
2624 if (time_before(clp->cl_last_renewal,now))
2625 clp->cl_last_renewal = now;
2626 spin_unlock(&clp->cl_lock);
2627 return 0;
2628}
2629
aa1870af
BF		 2630static inline int nfs4_server_supports_acls(struct nfs_server *server)
2631{
2632 return (server->caps & NFS_CAP_ACLS)
2633 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2634 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2635}
2636
2637/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2638 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2639 * the stack.
2640 */
2641#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2642
2643static void buf_to_pages(const void *buf, size_t buflen,
2644 struct page **pages, unsigned int *pgbase)
2645{
2646 const void *p = buf;
2647
2648 *pgbase = offset_in_page(buf);
2649 p -= *pgbase;
2650 while (p < buf + buflen) {
2651 *(pages++) = virt_to_page(p);
2652 p += PAGE_CACHE_SIZE;
2653 }
2654}
2655
e50a1c2e
BF		 2656struct nfs4_cached_acl {
2657 int cached;
2658 size_t len;
3e9d4154 2659 char data[0];
e50a1c2e
BF		 2660};
2661
2662static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2663{
2664 struct nfs_inode *nfsi = NFS_I(inode);
2665
2666 spin_lock(&inode->i_lock);
2667 kfree(nfsi->nfs4_acl);
2668 nfsi->nfs4_acl = acl;
2669 spin_unlock(&inode->i_lock);
2670}
2671
2672static void nfs4_zap_acl_attr(struct inode *inode)
2673{
2674 nfs4_set_cached_acl(inode, NULL);
2675}
2676
2677static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2678{
2679 struct nfs_inode *nfsi = NFS_I(inode);
2680 struct nfs4_cached_acl *acl;
2681 int ret = -ENOENT;
2682
2683 spin_lock(&inode->i_lock);
2684 acl = nfsi->nfs4_acl;
2685 if (acl == NULL)
2686 goto out;
2687 if (buf == NULL) /* user is just asking for length */
2688 goto out_len;
2689 if (acl->cached == 0)
2690 goto out;
2691 ret = -ERANGE; /* see getxattr(2) man page */
2692 if (acl->len > buflen)
2693 goto out;
2694 memcpy(buf, acl->data, acl->len);
2695out_len:
2696 ret = acl->len;
2697out:
2698 spin_unlock(&inode->i_lock);
2699 return ret;
2700}
2701
2702static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2703{
2704 struct nfs4_cached_acl *acl;
2705
2706 if (buf && acl_len <= PAGE_SIZE) {
2707 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2708 if (acl == NULL)
2709 goto out;
2710 acl->cached = 1;
2711 memcpy(acl->data, buf, acl_len);
2712 } else {
2713 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2714 if (acl == NULL)
2715 goto out;
2716 acl->cached = 0;
2717 }
2718 acl->len = acl_len;
2719out:
2720 nfs4_set_cached_acl(inode, acl);
2721}
2722
16b4289c 2723static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2724{
aa1870af
BF		 2725 struct page *pages[NFS4ACL_MAXPAGES];
2726 struct nfs_getaclargs args = {
2727 .fh = NFS_FH(inode),
2728 .acl_pages = pages,
2729 .acl_len = buflen,
2730 };
2731 size_t resp_len = buflen;
e50a1c2e 2732 void *resp_buf;
aa1870af
BF		 2733 struct rpc_message msg = {
2734 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2735 .rpc_argp = &args,
2736 .rpc_resp = &resp_len,
2737 };
e50a1c2e 2738 struct page *localpage = NULL;
aa1870af
BF		 2739 int ret;
2740
e50a1c2e
BF		 2741 if (buflen < PAGE_SIZE) {
2742 /* As long as we're doing a round trip to the server anyway,
2743 * let's be prepared for a page of acl data. */
2744 localpage = alloc_page(GFP_KERNEL);
2745 resp_buf = page_address(localpage);
2746 if (localpage == NULL)
2747 return -ENOMEM;
2748 args.acl_pages[0] = localpage;
2749 args.acl_pgbase = 0;
1d95db8e 2750 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2751 } else {
2752 resp_buf = buf;
2753 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2754 }
aa1870af 2755 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2756 if (ret)
2757 goto out_free;
2758 if (resp_len > args.acl_len)
2759 nfs4_write_cached_acl(inode, NULL, resp_len);
2760 else
2761 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2762 if (buf) {
2763 ret = -ERANGE;
2764 if (resp_len > buflen)
2765 goto out_free;
2766 if (localpage)
2767 memcpy(buf, resp_buf, resp_len);
2768 }
2769 ret = resp_len;
2770out_free:
2771 if (localpage)
2772 __free_page(localpage);
aa1870af
BF		 2773 return ret;
2774}
2775
16b4289c
TM		 2776static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2777{
2778 struct nfs4_exception exception = { };
2779 ssize_t ret;
2780 do {
2781 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2782 if (ret >= 0)
2783 break;
2784 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2785 } while (exception.retry);
2786 return ret;
2787}
2788
e50a1c2e
BF		 2789static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2790{
2791 struct nfs_server *server = NFS_SERVER(inode);
2792 int ret;
2793
2794 if (!nfs4_server_supports_acls(server))
2795 return -EOPNOTSUPP;
2796 ret = nfs_revalidate_inode(server, inode);
2797 if (ret < 0)
2798 return ret;
f41f7418
TM		 2799 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2800 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 2801 ret = nfs4_read_cached_acl(inode, buf, buflen);
2802 if (ret != -ENOENT)
2803 return ret;
2804 return nfs4_get_acl_uncached(inode, buf, buflen);
2805}
2806
16b4289c 2807static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2808{
2809 struct nfs_server *server = NFS_SERVER(inode);
2810 struct page *pages[NFS4ACL_MAXPAGES];
2811 struct nfs_setaclargs arg = {
2812 .fh = NFS_FH(inode),
2813 .acl_pages = pages,
2814 .acl_len = buflen,
2815 };
2816 struct rpc_message msg = {
2817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2818 .rpc_argp = &arg,
2819 .rpc_resp = NULL,
2820 };
2821 int ret;
2822
2823 if (!nfs4_server_supports_acls(server))
2824 return -EOPNOTSUPP;
642ac549 2825 nfs_inode_return_delegation(inode);
4b580ee3 2826 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2827 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
f41f7418
TM		 2828 nfs_access_zap_cache(inode);
2829 nfs_zap_acl_cache(inode);
4b580ee3
BF		 2830 return ret;
2831}
2832
16b4289c
TM		 2833static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2834{
2835 struct nfs4_exception exception = { };
2836 int err;
2837 do {
2838 err = nfs4_handle_exception(NFS_SERVER(inode),
2839 __nfs4_proc_set_acl(inode, buf, buflen),
2840 &exception);
2841 } while (exception.retry);
2842 return err;
2843}
2844
1da177e4 2845static int
9e33bed5 2846nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 2847{
7539bbab 2848 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2849
2850 if (!clp || task->tk_status >= 0)
2851 return 0;
2852 switch(task->tk_status) {
9e33bed5
TM		 2853 case -NFS4ERR_ADMIN_REVOKED:
2854 case -NFS4ERR_BAD_STATEID:
2855 case -NFS4ERR_OPENMODE:
2856 if (state == NULL)
2857 break;
2858 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 2859 case -NFS4ERR_STALE_CLIENTID:
2860 case -NFS4ERR_STALE_STATEID:
2861 case -NFS4ERR_EXPIRED:
5d00837b 2862 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 2863 nfs4_schedule_state_recovery(clp);
e005e804 2864 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 2865 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 2866 task->tk_status = 0;
2867 return -EAGAIN;
1da177e4 2868 case -NFS4ERR_DELAY:
2e96d286 2869 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 2870 case -NFS4ERR_GRACE:
1da177e4
LT		 2871 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2872 task->tk_status = 0;
2873 return -EAGAIN;
2874 case -NFS4ERR_OLD_STATEID:
2875 task->tk_status = 0;
2876 return -EAGAIN;
2877 }
2878 task->tk_status = nfs4_map_errors(task->tk_status);
2879 return 0;
2880}
2881
adfa6f98 2882int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2883{
2884 nfs4_verifier sc_verifier;
2885 struct nfs4_setclientid setclientid = {
2886 .sc_verifier = &sc_verifier,
2887 .sc_prog = program,
2888 };
2889 struct rpc_message msg = {
2890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2891 .rpc_argp = &setclientid,
2892 .rpc_resp = clp,
286d7d6a 2893 .rpc_cred = cred,
1da177e4 2894 };
bc4785cd 2895 __be32 *p;
1da177e4
LT		 2896 int loop = 0;
2897 int status;
2898
bc4785cd 2899 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2900 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2901 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2902
2903 for(;;) {
2904 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 2905 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 2906 clp->cl_ipaddr,
2907 rpc_peeraddr2str(clp->cl_rpcclient,
2908 RPC_DISPLAY_ADDR),
69dd716c
TM		 2909 rpc_peeraddr2str(clp->cl_rpcclient,
2910 RPC_DISPLAY_PROTO),
78ea323b 2911 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 2912 clp->cl_id_uniquifier);
2913 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 2914 sizeof(setclientid.sc_netid),
2915 rpc_peeraddr2str(clp->cl_rpcclient,
2916 RPC_DISPLAY_NETID));
1da177e4 2917 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 2918 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 2919 clp->cl_ipaddr, port >> 8, port & 255);
2920
2921 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2922 if (status != -NFS4ERR_CLID_INUSE)
2923 break;
2924 if (signalled())
2925 break;
2926 if (loop++ & 1)
2927 ssleep(clp->cl_lease_time + 1);
2928 else
2929 if (++clp->cl_id_uniquifier == 0)
2930 break;
2931 }
2932 return status;
2933}
2934
adfa6f98 2935static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2936{
2937 struct nfs_fsinfo fsinfo;
2938 struct rpc_message msg = {
2939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2940 .rpc_argp = clp,
2941 .rpc_resp = &fsinfo,
286d7d6a 2942 .rpc_cred = cred,
1da177e4
LT		 2943 };
2944 unsigned long now;
2945 int status;
2946
2947 now = jiffies;
2948 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2949 if (status == 0) {
2950 spin_lock(&clp->cl_lock);
2951 clp->cl_lease_time = fsinfo.lease_time * HZ;
2952 clp->cl_last_renewal = now;
2953 spin_unlock(&clp->cl_lock);
2954 }
2955 return status;
2956}
2957
adfa6f98 2958int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 2959{
77e03677 2960 long timeout = 0;
51581f3b
TM		 2961 int err;
2962 do {
2963 err = _nfs4_proc_setclientid_confirm(clp, cred);
2964 switch (err) {
2965 case 0:
2966 return err;
2967 case -NFS4ERR_RESOURCE:
2968 /* The IBM lawyers misread another document! */
2969 case -NFS4ERR_DELAY:
2970 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2971 }
2972 } while (err == 0);
2973 return err;
2974}
2975
fe650407
TM		 2976struct nfs4_delegreturndata {
2977 struct nfs4_delegreturnargs args;
fa178f29 2978 struct nfs4_delegreturnres res;
fe650407
TM		 2979 struct nfs_fh fh;
2980 nfs4_stateid stateid;
26e976a8 2981 unsigned long timestamp;
fa178f29 2982 struct nfs_fattr fattr;
fe650407
TM		 2983 int rpc_status;
2984};
2985
fe650407
TM		 2986static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2987{
2988 struct nfs4_delegreturndata *data = calldata;
2989 data->rpc_status = task->tk_status;
26e976a8 2990 if (data->rpc_status == 0)
fa178f29 2991 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 2992}
2993
2994static void nfs4_delegreturn_release(void *calldata)
2995{
fe650407
TM		 2996 kfree(calldata);
2997}
2998
c8d149f3 2999static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3000 .rpc_call_done = nfs4_delegreturn_done,
3001 .rpc_release = nfs4_delegreturn_release,
3002};
3003
e6f81075 3004static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3005{
3006 struct nfs4_delegreturndata *data;
fa178f29 3007 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3008 struct rpc_task *task;
5138fde0
TM		 3009 struct rpc_message msg = {
3010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3011 .rpc_cred = cred,
3012 };
c970aa85
TM		 3013 struct rpc_task_setup task_setup_data = {
3014 .rpc_client = server->client,
5138fde0 3015 .rpc_message = &msg,
c970aa85
TM		 3016 .callback_ops = &nfs4_delegreturn_ops,
3017 .flags = RPC_TASK_ASYNC,
3018 };
e6f81075 3019 int status = 0;
fe650407
TM		 3020
3021 data = kmalloc(sizeof(*data), GFP_KERNEL);
3022 if (data == NULL)
3023 return -ENOMEM;
3024 data->args.fhandle = &data->fh;
3025 data->args.stateid = &data->stateid;
fa178f29 3026 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3027 nfs_copy_fh(&data->fh, NFS_FH(inode));
3028 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3029 data->res.fattr = &data->fattr;
3030 data->res.server = server;
5138fde0 3031 nfs_fattr_init(data->res.fattr);
26e976a8 3032 data->timestamp = jiffies;
fe650407
TM		 3033 data->rpc_status = 0;
3034
c970aa85 3035 task_setup_data.callback_data = data;
5138fde0
TM		 3036 msg.rpc_argp = &data->args,
3037 msg.rpc_resp = &data->res,
c970aa85 3038 task = rpc_run_task(&task_setup_data);
7a1218a2 3039 if (IS_ERR(task))
fe650407 3040 return PTR_ERR(task);
e6f81075
TM		 3041 if (!issync)
3042 goto out;
fe650407 3043 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3044 if (status != 0)
3045 goto out;
3046 status = data->rpc_status;
3047 if (status != 0)
3048 goto out;
3049 nfs_refresh_inode(inode, &data->fattr);
3050out:
e6b3c4db 3051 rpc_put_task(task);
fe650407 3052 return status;
1da177e4
LT		 3053}
3054
e6f81075 3055int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3056{
3057 struct nfs_server *server = NFS_SERVER(inode);
3058 struct nfs4_exception exception = { };
3059 int err;
3060 do {
e6f81075 3061 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3062 switch (err) {
3063 case -NFS4ERR_STALE_STATEID:
3064 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3065 case 0:
3066 return 0;
3067 }
3068 err = nfs4_handle_exception(server, err, &exception);
3069 } while (exception.retry);
3070 return err;
3071}
3072
3073#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3074#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3075
3076/*
3077 * sleep, with exponential backoff, and retry the LOCK operation.
3078 */
3079static unsigned long
3080nfs4_set_lock_task_retry(unsigned long timeout)
3081{
150030b7 3082 schedule_timeout_killable(timeout);
1da177e4
LT		 3083 timeout <<= 1;
3084 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3085 return NFS4_LOCK_MAXTIMEOUT;
3086 return timeout;
3087}
3088
1da177e4
LT		 3089static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3090{
3091 struct inode *inode = state->inode;
3092 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3093 struct nfs_client *clp = server->nfs_client;
911d1aaf 3094 struct nfs_lockt_args arg = {
1da177e4 3095 .fh = NFS_FH(inode),
911d1aaf 3096 .fl = request,
1da177e4 3097 };
911d1aaf
TM		 3098 struct nfs_lockt_res res = {
3099 .denied = request,
1da177e4
LT		 3100 };
3101 struct rpc_message msg = {
3102 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3103 .rpc_argp = &arg,
3104 .rpc_resp = &res,
3105 .rpc_cred = state->owner->so_cred,
3106 };
1da177e4
LT		 3107 struct nfs4_lock_state *lsp;
3108 int status;
3109
911d1aaf 3110 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3111 status = nfs4_set_lock_state(state, request);
3112 if (status != 0)
3113 goto out;
3114 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3115 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3116 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3117 switch (status) {
3118 case 0:
3119 request->fl_type = F_UNLCK;
3120 break;
3121 case -NFS4ERR_DENIED:
3122 status = 0;
1da177e4 3123 }
70cc6487 3124 request->fl_ops->fl_release_private(request);
8d0a8a9d 3125out:
1da177e4
LT		 3126 return status;
3127}
3128
3129static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3130{
3131 struct nfs4_exception exception = { };
3132 int err;
3133
3134 do {
3135 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3136 _nfs4_proc_getlk(state, cmd, request),
3137 &exception);
3138 } while (exception.retry);
3139 return err;
3140}
3141
3142static int do_vfs_lock(struct file *file, struct file_lock *fl)
3143{
3144 int res = 0;
3145 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3146 case FL_POSIX:
3147 res = posix_lock_file_wait(file, fl);
3148 break;
3149 case FL_FLOCK:
3150 res = flock_lock_file_wait(file, fl);
3151 break;
3152 default:
3153 BUG();
3154 }
1da177e4
LT		 3155 return res;
3156}
3157
faf5f49c 3158struct nfs4_unlockdata {
911d1aaf
TM		 3159 struct nfs_locku_args arg;
3160 struct nfs_locku_res res;
faf5f49c
TM		 3161 struct nfs4_lock_state *lsp;
3162 struct nfs_open_context *ctx;
911d1aaf
TM		 3163 struct file_lock fl;
3164 const struct nfs_server *server;
26e976a8 3165 unsigned long timestamp;
faf5f49c
TM		 3166};
3167
911d1aaf
TM		 3168static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3169 struct nfs_open_context *ctx,
3170 struct nfs4_lock_state *lsp,
3171 struct nfs_seqid *seqid)
3172{
3173 struct nfs4_unlockdata *p;
3174 struct inode *inode = lsp->ls_state->inode;
3175
3176 p = kmalloc(sizeof(*p), GFP_KERNEL);
3177 if (p == NULL)
3178 return NULL;
3179 p->arg.fh = NFS_FH(inode);
3180 p->arg.fl = &p->fl;
3181 p->arg.seqid = seqid;
c1d51931 3182 p->res.seqid = seqid;
911d1aaf
TM		 3183 p->arg.stateid = &lsp->ls_stateid;
3184 p->lsp = lsp;
3185 atomic_inc(&lsp->ls_count);
3186 /* Ensure we don't close file until we're done freeing locks! */
3187 p->ctx = get_nfs_open_context(ctx);
3188 memcpy(&p->fl, fl, sizeof(p->fl));
3189 p->server = NFS_SERVER(inode);
3190 return p;
3191}
3192
06f814a3 3193static void nfs4_locku_release_calldata(void *data)
faf5f49c 3194{
963d8fe5 3195 struct nfs4_unlockdata *calldata = data;
911d1aaf 3196 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3197 nfs4_put_lock_state(calldata->lsp);
3198 put_nfs_open_context(calldata->ctx);
3199 kfree(calldata);
faf5f49c
TM		 3200}
3201
963d8fe5 3202static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3203{
963d8fe5 3204 struct nfs4_unlockdata *calldata = data;
faf5f49c 3205
06f814a3
TM		 3206 if (RPC_ASSASSINATED(task))
3207 return;
faf5f49c
TM		 3208 switch (task->tk_status) {
3209 case 0:
3210 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3211 calldata->res.stateid.data,
faf5f49c 3212 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3213 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3214 break;
9e33bed5
TM		 3215 case -NFS4ERR_BAD_STATEID:
3216 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3217 case -NFS4ERR_STALE_STATEID:
3218 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3219 break;
3220 default:
9e33bed5 3221 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
faf5f49c 3222 rpc_restart_call(task);
faf5f49c 3223 }
faf5f49c
TM		 3224}
3225
4ce70ada 3226static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3227{
4ce70ada 3228 struct nfs4_unlockdata *calldata = data;
faf5f49c 3229
911d1aaf 3230 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3231 return;
3232 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3233 /* Note: exit _without_ running nfs4_locku_done */
3234 task->tk_action = NULL;
faf5f49c
TM		 3235 return;
3236 }
26e976a8 3237 calldata->timestamp = jiffies;
5138fde0 3238 rpc_call_start(task);
faf5f49c
TM		 3239}
3240
963d8fe5 3241static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3242 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3243 .rpc_call_done = nfs4_locku_done,
06f814a3 3244 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3245};
3246
a5d16a4d
TM		 3247static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3248 struct nfs_open_context *ctx,
3249 struct nfs4_lock_state *lsp,
3250 struct nfs_seqid *seqid)
3251{
3252 struct nfs4_unlockdata *data;
5138fde0
TM		 3253 struct rpc_message msg = {
3254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3255 .rpc_cred = ctx->cred,
3256 };
c970aa85
TM		 3257 struct rpc_task_setup task_setup_data = {
3258 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3259 .rpc_message = &msg,
c970aa85 3260 .callback_ops = &nfs4_locku_ops,
101070ca 3261 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3262 .flags = RPC_TASK_ASYNC,
3263 };
a5d16a4d 3264
137d6aca
FF		 3265 /* Ensure this is an unlock - when canceling a lock, the
3266 * canceled lock is passed in, and it won't be an unlock.
3267 */
3268 fl->fl_type = F_UNLCK;
3269
a5d16a4d
TM		 3270 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3271 if (data == NULL) {
3272 nfs_free_seqid(seqid);
3273 return ERR_PTR(-ENOMEM);
3274 }
3275
5138fde0
TM		 3276 msg.rpc_argp = &data->arg,
3277 msg.rpc_resp = &data->res,
c970aa85
TM		 3278 task_setup_data.callback_data = data;
3279 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3280}
3281
faf5f49c
TM		 3282static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3283{
19e03c57 3284 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3285 struct nfs_seqid *seqid;
1da177e4 3286 struct nfs4_lock_state *lsp;
06f814a3
TM		 3287 struct rpc_task *task;
3288 int status = 0;
536ff0f8 3289 unsigned char fl_flags = request->fl_flags;
faf5f49c 3290
8d0a8a9d 3291 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3292 /* Unlock _before_ we do the RPC call */
3293 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3294 down_read(&nfsi->rwsem);
3295 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3296 up_read(&nfsi->rwsem);
9b073574 3297 goto out;
19e03c57
TM		 3298 }
3299 up_read(&nfsi->rwsem);
8d0a8a9d 3300 if (status != 0)
9b073574
TM		 3301 goto out;
3302 /* Is this a delegated lock? */
3303 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3304 goto out;
8d0a8a9d 3305 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3306 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3307 status = -ENOMEM;
911d1aaf 3308 if (seqid == NULL)
9b073574 3309 goto out;
cd3758e3 3310 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3311 status = PTR_ERR(task);
3312 if (IS_ERR(task))
9b073574 3313 goto out;
a5d16a4d 3314 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3315 rpc_put_task(task);
9b073574 3316out:
536ff0f8 3317 request->fl_flags = fl_flags;
1da177e4
LT		 3318 return status;
3319}
3320
a5d16a4d
TM		 3321struct nfs4_lockdata {
3322 struct nfs_lock_args arg;
3323 struct nfs_lock_res res;
3324 struct nfs4_lock_state *lsp;
3325 struct nfs_open_context *ctx;
3326 struct file_lock fl;
26e976a8 3327 unsigned long timestamp;
a5d16a4d
TM		 3328 int rpc_status;
3329 int cancelled;
3330};
3331
3332static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3333 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3334{
a5d16a4d
TM		 3335 struct nfs4_lockdata *p;
3336 struct inode *inode = lsp->ls_state->inode;
1da177e4 3337 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3338
3339 p = kzalloc(sizeof(*p), GFP_KERNEL);
3340 if (p == NULL)
3341 return NULL;
3342
3343 p->arg.fh = NFS_FH(inode);
3344 p->arg.fl = &p->fl;
2f74c0a0
TM		 3345 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3346 if (p->arg.open_seqid == NULL)
3347 goto out_free;
a5d16a4d
TM		 3348 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3349 if (p->arg.lock_seqid == NULL)
2f74c0a0 3350 goto out_free_seqid;
a5d16a4d 3351 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3352 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3353 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3354 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d
TM		 3355 p->lsp = lsp;
3356 atomic_inc(&lsp->ls_count);
3357 p->ctx = get_nfs_open_context(ctx);
3358 memcpy(&p->fl, fl, sizeof(p->fl));
3359 return p;
2f74c0a0
TM		 3360out_free_seqid:
3361 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3362out_free:
3363 kfree(p);
3364 return NULL;
3365}
3366
3367static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3368{
3369 struct nfs4_lockdata *data = calldata;
3370 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3371
3110ff80 3372 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3373 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3374 return;
a5d16a4d
TM		 3375 /* Do we need to do an open_to_lock_owner? */
3376 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3377 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3378 return;
a5d16a4d
TM		 3379 data->arg.open_stateid = &state->stateid;
3380 data->arg.new_lock_owner = 1;
c1d51931 3381 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3382 } else
3383 data->arg.new_lock_owner = 0;
26e976a8 3384 data->timestamp = jiffies;
5138fde0 3385 rpc_call_start(task);
3110ff80 3386 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3387}
3388
3389static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3390{
3391 struct nfs4_lockdata *data = calldata;
3392
3110ff80 3393 dprintk("%s: begin!\n", __func__);
a5d16a4d
TM		 3394
3395 data->rpc_status = task->tk_status;
3396 if (RPC_ASSASSINATED(task))
3397 goto out;
3398 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3399 if (data->rpc_status == 0)
3400 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3401 else
3402 goto out;
3403 }
3404 if (data->rpc_status == 0) {
3405 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3406 sizeof(data->lsp->ls_stateid.data));
3407 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3408 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3409 }
a5d16a4d 3410out:
3110ff80 3411 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3412}
3413
3414static void nfs4_lock_release(void *calldata)
3415{
3416 struct nfs4_lockdata *data = calldata;
3417
3110ff80 3418 dprintk("%s: begin!\n", __func__);
2f74c0a0 3419 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3420 if (data->cancelled != 0) {
3421 struct rpc_task *task;
3422 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3423 data->arg.lock_seqid);
3424 if (!IS_ERR(task))
e6b3c4db 3425 rpc_put_task(task);
3110ff80 3426 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3427 } else
3428 nfs_free_seqid(data->arg.lock_seqid);
3429 nfs4_put_lock_state(data->lsp);
3430 put_nfs_open_context(data->ctx);
3431 kfree(data);
3110ff80 3432 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3433}
3434
3435static const struct rpc_call_ops nfs4_lock_ops = {
3436 .rpc_call_prepare = nfs4_lock_prepare,
3437 .rpc_call_done = nfs4_lock_done,
3438 .rpc_release = nfs4_lock_release,
3439};
3440
3441static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3442{
3443 struct nfs4_lockdata *data;
3444 struct rpc_task *task;
5138fde0
TM		 3445 struct rpc_message msg = {
3446 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3447 .rpc_cred = state->owner->so_cred,
3448 };
c970aa85
TM		 3449 struct rpc_task_setup task_setup_data = {
3450 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3451 .rpc_message = &msg,
c970aa85 3452 .callback_ops = &nfs4_lock_ops,
101070ca 3453 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3454 .flags = RPC_TASK_ASYNC,
3455 };
a5d16a4d
TM		 3456 int ret;
3457
3110ff80 3458 dprintk("%s: begin!\n", __func__);
cd3758e3 3459 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3460 fl->fl_u.nfs4_fl.owner);
3461 if (data == NULL)
3462 return -ENOMEM;
3463 if (IS_SETLKW(cmd))
3464 data->arg.block = 1;
3465 if (reclaim != 0)
3466 data->arg.reclaim = 1;
5138fde0
TM		 3467 msg.rpc_argp = &data->arg,
3468 msg.rpc_resp = &data->res,
c970aa85
TM		 3469 task_setup_data.callback_data = data;
3470 task = rpc_run_task(&task_setup_data);
7a1218a2 3471 if (IS_ERR(task))
a5d16a4d 3472 return PTR_ERR(task);
a5d16a4d
TM		 3473 ret = nfs4_wait_for_completion_rpc_task(task);
3474 if (ret == 0) {
3475 ret = data->rpc_status;
3476 if (ret == -NFS4ERR_DENIED)
3477 ret = -EAGAIN;
3478 } else
3479 data->cancelled = 1;
e6b3c4db 3480 rpc_put_task(task);
3110ff80 3481 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3482 return ret;
1da177e4
LT		 3483}
3484
3485static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3486{
202b50dc
TM		 3487 struct nfs_server *server = NFS_SERVER(state->inode);
3488 struct nfs4_exception exception = { };
3489 int err;
3490
3491 do {
42a2d13e
TM		 3492 /* Cache the lock if possible... */
3493 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3494 return 0;
202b50dc
TM		 3495 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3496 if (err != -NFS4ERR_DELAY)
3497 break;
3498 nfs4_handle_exception(server, err, &exception);
3499 } while (exception.retry);
3500 return err;
1da177e4
LT		 3501}
3502
3503static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3504{
202b50dc
TM		 3505 struct nfs_server *server = NFS_SERVER(state->inode);
3506 struct nfs4_exception exception = { };
3507 int err;
3508
6bfc93ef
TM		 3509 err = nfs4_set_lock_state(state, request);
3510 if (err != 0)
3511 return err;
202b50dc 3512 do {
42a2d13e
TM		 3513 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3514 return 0;
202b50dc
TM		 3515 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3516 if (err != -NFS4ERR_DELAY)
3517 break;
3518 nfs4_handle_exception(server, err, &exception);
3519 } while (exception.retry);
3520 return err;
1da177e4
LT		 3521}
3522
3523static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3524{
19e03c57 3525 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 3526 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3527 int status;
3528
6bfc93ef 3529 /* Is this a delegated open? */
6bfc93ef
TM		 3530 status = nfs4_set_lock_state(state, request);
3531 if (status != 0)
3532 goto out;
01c3b861
TM		 3533 request->fl_flags |= FL_ACCESS;
3534 status = do_vfs_lock(request->fl_file, request);
3535 if (status < 0)
3536 goto out;
19e03c57 3537 down_read(&nfsi->rwsem);
01c3b861 3538 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 3539 /* Yes: cache locks! */
01c3b861 3540 /* ...but avoid races with delegation recall... */
19e03c57
TM		 3541 request->fl_flags = fl_flags & ~FL_SLEEP;
3542 status = do_vfs_lock(request->fl_file, request);
3543 goto out_unlock;
01c3b861 3544 }
6bfc93ef
TM		 3545 status = _nfs4_do_setlk(state, cmd, request, 0);
3546 if (status != 0)
01c3b861 3547 goto out_unlock;
6bfc93ef 3548 /* Note: we always want to sleep here! */
01c3b861 3549 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 3550 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 3551 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 3552out_unlock:
19e03c57 3553 up_read(&nfsi->rwsem);
01c3b861
TM		 3554out:
3555 request->fl_flags = fl_flags;
1da177e4
LT		 3556 return status;
3557}
3558
3559static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3560{
3561 struct nfs4_exception exception = { };
3562 int err;
3563
3564 do {
3565 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3566 _nfs4_proc_setlk(state, cmd, request),
3567 &exception);
3568 } while (exception.retry);
3569 return err;
3570}
3571
3572static int
3573nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3574{
3575 struct nfs_open_context *ctx;
3576 struct nfs4_state *state;
3577 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3578 int status;
3579
3580 /* verify open state */
cd3758e3 3581 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3582 state = ctx->state;
3583
3584 if (request->fl_start < 0 || request->fl_end < 0)
3585 return -EINVAL;
3586
3587 if (IS_GETLK(cmd))
3588 return nfs4_proc_getlk(state, F_GETLK, request);
3589
3590 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3591 return -EINVAL;
3592
3593 if (request->fl_type == F_UNLCK)
3594 return nfs4_proc_unlck(state, cmd, request);
3595
3596 do {
3597 status = nfs4_proc_setlk(state, cmd, request);
3598 if ((status != -EAGAIN) || IS_SETLK(cmd))
3599 break;
3600 timeout = nfs4_set_lock_task_retry(timeout);
3601 status = -ERESTARTSYS;
3602 if (signalled())
3603 break;
3604 } while(status < 0);
1da177e4
LT		 3605 return status;
3606}
3607
888e694c
TM		 3608int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3609{
3610 struct nfs_server *server = NFS_SERVER(state->inode);
3611 struct nfs4_exception exception = { };
3612 int err;
3613
3614 err = nfs4_set_lock_state(state, fl);
3615 if (err != 0)
3616 goto out;
3617 do {
3618 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3619 if (err != -NFS4ERR_DELAY)
3620 break;
3621 err = nfs4_handle_exception(server, err, &exception);
3622 } while (exception.retry);
3623out:
3624 return err;
3625}
6b3b5496 3626
aa1870af
BF		 3627#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3628
6b3b5496
BF		 3629int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3630 size_t buflen, int flags)
3631{
4b580ee3
BF		 3632 struct inode *inode = dentry->d_inode;
3633
3634 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3635 return -EOPNOTSUPP;
3636
4b580ee3 3637 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3638}
3639
3640/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3641 * and that's what we'll do for e.g. user attributes that haven't been set.
3642 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3643 * attributes in kernel-managed attribute namespaces. */
3644ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3645 size_t buflen)
3646{
aa1870af
BF		 3647 struct inode *inode = dentry->d_inode;
3648
3649 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3650 return -EOPNOTSUPP;
3651
3652 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3653}
3654
3655ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3656{
aa1870af 3657 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3658
096455a2
BF		 3659 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3660 return 0;
6b3b5496
BF		 3661 if (buf && buflen < len)
3662 return -ERANGE;
3663 if (buf)
aa1870af
BF		 3664 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3665 return len;
6b3b5496
BF		 3666}
3667
56659e99 3668int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3669 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3670{
3671 struct nfs_server *server = NFS_SERVER(dir);
3672 u32 bitmask[2] = {
361e624f
MN		 3673 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3674 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3675 };
3676 struct nfs4_fs_locations_arg args = {
3677 .dir_fh = NFS_FH(dir),
c228fd3a 3678 .name = name,
683b57b4
TM		 3679 .page = page,
3680 .bitmask = bitmask,
3681 };
3682 struct rpc_message msg = {
3683 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3684 .rpc_argp = &args,
7aaa0b3b 3685 .rpc_resp = fs_locations,
683b57b4
TM		 3686 };
3687 int status;
3688
3110ff80 3689 dprintk("%s: start\n", __func__);
c228fd3a 3690 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3691 fs_locations->server = server;
830b8e33 3692 fs_locations->nlocations = 0;
683b57b4 3693 status = rpc_call_sync(server->client, &msg, 0);
3110ff80 3694 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 3695 return status;
3696}
3697
1da177e4 3698struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
7eff03ae 3699 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 3700 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 3701 .recover_open = nfs4_open_reclaim,
3702 .recover_lock = nfs4_lock_reclaim,
3703};
3704
b79a4a1b 3705struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
7eff03ae 3706 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 3707 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 3708 .recover_open = nfs4_open_expired,
3709 .recover_lock = nfs4_lock_expired,
3710};
3711
92e1d5be 3712static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3713 .permission = nfs_permission,
3714 .getattr = nfs_getattr,
3715 .setattr = nfs_setattr,
3716 .getxattr = nfs4_getxattr,
3717 .setxattr = nfs4_setxattr,
3718 .listxattr = nfs4_listxattr,
3719};
3720
509de811 3721const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3722 .version = 4, /* protocol version */
3723 .dentry_ops = &nfs4_dentry_operations,
3724 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3725 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3726 .getroot = nfs4_proc_get_root,
3727 .getattr = nfs4_proc_getattr,
3728 .setattr = nfs4_proc_setattr,
2b3de441 3729 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3730 .lookup = nfs4_proc_lookup,
3731 .access = nfs4_proc_access,
3732 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3733 .create = nfs4_proc_create,
3734 .remove = nfs4_proc_remove,
3735 .unlink_setup = nfs4_proc_unlink_setup,
3736 .unlink_done = nfs4_proc_unlink_done,
3737 .rename = nfs4_proc_rename,
3738 .link = nfs4_proc_link,
3739 .symlink = nfs4_proc_symlink,
3740 .mkdir = nfs4_proc_mkdir,
3741 .rmdir = nfs4_proc_remove,
3742 .readdir = nfs4_proc_readdir,
3743 .mknod = nfs4_proc_mknod,
3744 .statfs = nfs4_proc_statfs,
3745 .fsinfo = nfs4_proc_fsinfo,
3746 .pathconf = nfs4_proc_pathconf,
e9326dca 3747 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3748 .decode_dirent = nfs4_decode_dirent,
3749 .read_setup = nfs4_proc_read_setup,
ec06c096 3750 .read_done = nfs4_read_done,
1da177e4 3751 .write_setup = nfs4_proc_write_setup,
788e7a89 3752 .write_done = nfs4_write_done,
1da177e4 3753 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3754 .commit_done = nfs4_commit_done,
1da177e4 3755 .lock = nfs4_proc_lock,
e50a1c2e 3756 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3757};
3758
3759/*
3760 * Local variables:
3761 * c-basic-offset: 8
3762 * End:
3763 */
Linux 6.x block layer and io_uring tree(s)