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nfs41: use nfs4_fs_locations_res
[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 69/* Prevent leaks of NFSv4 errors into userland */
46f72f57 70static int nfs4_map_errors(int err)
1da177e4
LT		 71{
72 if (err < -1000) {
73 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 74 __func__, -err);
1da177e4
LT		 75 return -EIO;
76 }
77 return err;
78}
79
80/*
81 * This is our standard bitmap for GETATTR requests.
82 */
83const u32 nfs4_fattr_bitmap[2] = {
84 FATTR4_WORD0_TYPE
85 | FATTR4_WORD0_CHANGE
86 | FATTR4_WORD0_SIZE
87 | FATTR4_WORD0_FSID
88 | FATTR4_WORD0_FILEID,
89 FATTR4_WORD1_MODE
90 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER
92 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_RAWDEV
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
98};
99
100const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
107};
108
4ce79717 109const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 110 FATTR4_WORD0_MAXLINK
111 | FATTR4_WORD0_MAXNAME,
112 0
113};
114
115const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
119 0
120};
121
830b8e33
MN		 122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
139};
140
bc4785cd 141static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 142 struct nfs4_readdir_arg *readdir)
143{
0dbb4c67 144 __be32 *start, *p;
1da177e4
LT		 145
146 BUG_ON(readdir->count < 80);
147 if (cookie > 2) {
b7ef1956 148 readdir->cookie = cookie;
1da177e4
LT		 149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
150 return;
151 }
152
153 readdir->cookie = 0;
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
155 if (cookie == 2)
156 return;
157
158 /*
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
163 * instead of 1 or 2.
164 */
0dbb4c67 165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 166
167 if (cookie == 0) {
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
173 p++;
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
4e769b93 177 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 178 }
179
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
185 p++;
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
4e769b93 189 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 190
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
194}
195
65de872e
TM		 196static int nfs4_wait_clnt_recover(struct nfs_client *clp)
197{
198 int res;
199
200 might_sleep();
201
e005e804 202 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 203 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 204 return res;
205}
206
207static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
208{
209 int res = 0;
210
211 might_sleep();
212
213 if (*timeout <= 0)
214 *timeout = NFS4_POLL_RETRY_MIN;
215 if (*timeout > NFS4_POLL_RETRY_MAX)
216 *timeout = NFS4_POLL_RETRY_MAX;
217 schedule_timeout_killable(*timeout);
218 if (fatal_signal_pending(current))
219 res = -ERESTARTSYS;
220 *timeout <<= 1;
221 return res;
222}
223
224/* This is the error handling routine for processes that are allowed
225 * to sleep.
226 */
227static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
228{
229 struct nfs_client *clp = server->nfs_client;
9e33bed5 230 struct nfs4_state *state = exception->state;
65de872e
TM		 231 int ret = errorcode;
232
233 exception->retry = 0;
234 switch(errorcode) {
235 case 0:
236 return 0;
9e33bed5
TM		 237 case -NFS4ERR_ADMIN_REVOKED:
238 case -NFS4ERR_BAD_STATEID:
239 case -NFS4ERR_OPENMODE:
240 if (state == NULL)
241 break;
242 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 243 case -NFS4ERR_STALE_CLIENTID:
244 case -NFS4ERR_STALE_STATEID:
245 case -NFS4ERR_EXPIRED:
246 nfs4_schedule_state_recovery(clp);
247 ret = nfs4_wait_clnt_recover(clp);
248 if (ret == 0)
249 exception->retry = 1;
250 break;
251 case -NFS4ERR_FILE_OPEN:
252 case -NFS4ERR_GRACE:
253 case -NFS4ERR_DELAY:
254 ret = nfs4_delay(server->client, &exception->timeout);
255 if (ret != 0)
256 break;
257 case -NFS4ERR_OLD_STATEID:
258 exception->retry = 1;
259 }
260 /* We failed to handle the error */
261 return nfs4_map_errors(ret);
262}
263
264
26e976a8 265static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 266{
7539bbab 267 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 268 spin_lock(&clp->cl_lock);
269 if (time_before(clp->cl_last_renewal,timestamp))
270 clp->cl_last_renewal = timestamp;
271 spin_unlock(&clp->cl_lock);
272}
273
38478b24 274static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 275{
38478b24 276 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 277
38478b24 278 spin_lock(&dir->i_lock);
40d24704
TM		 279 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
280 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 281 nfs_force_lookup_revalidate(dir);
40d24704 282 nfsi->change_attr = cinfo->after;
38478b24 283 spin_unlock(&dir->i_lock);
1da177e4
LT		 284}
285
e56e0b78 286struct nfs4_opendata {
c6d00e63 287 struct kref kref;
e56e0b78
TM		 288 struct nfs_openargs o_arg;
289 struct nfs_openres o_res;
cdd4e68b
TM		 290 struct nfs_open_confirmargs c_arg;
291 struct nfs_open_confirmres c_res;
e56e0b78
TM		 292 struct nfs_fattr f_attr;
293 struct nfs_fattr dir_attr;
ad389da7 294 struct path path;
e56e0b78
TM		 295 struct dentry *dir;
296 struct nfs4_state_owner *owner;
aac00a8d 297 struct nfs4_state *state;
e56e0b78 298 struct iattr attrs;
26e976a8 299 unsigned long timestamp;
3e309914 300 unsigned int rpc_done : 1;
24ac23ab
TM		 301 int rpc_status;
302 int cancelled;
e56e0b78
TM		 303};
304
2ced46c2
TM		 305
306static void nfs4_init_opendata_res(struct nfs4_opendata *p)
307{
308 p->o_res.f_attr = &p->f_attr;
309 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 310 p->o_res.seqid = p->o_arg.seqid;
311 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 312 p->o_res.server = p->o_arg.server;
313 nfs_fattr_init(&p->f_attr);
314 nfs_fattr_init(&p->dir_attr);
315}
316
ad389da7 317static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 318 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 319 const struct iattr *attrs)
320{
ad389da7 321 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 322 struct inode *dir = parent->d_inode;
323 struct nfs_server *server = NFS_SERVER(dir);
324 struct nfs4_opendata *p;
325
326 p = kzalloc(sizeof(*p), GFP_KERNEL);
327 if (p == NULL)
328 goto err;
329 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
330 if (p->o_arg.seqid == NULL)
331 goto err_free;
ad389da7
TM		 332 p->path.mnt = mntget(path->mnt);
333 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 334 p->dir = parent;
335 p->owner = sp;
336 atomic_inc(&sp->so_count);
337 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 338 p->o_arg.open_flags = flags;
339 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 340 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 341 p->o_arg.id = sp->so_owner_id.id;
ad389da7 342 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 343 p->o_arg.server = server;
344 p->o_arg.bitmask = server->attr_bitmask;
345 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 346 if (flags & O_EXCL) {
347 u32 *s = (u32 *) p->o_arg.u.verifier.data;
348 s[0] = jiffies;
349 s[1] = current->pid;
350 } else if (flags & O_CREAT) {
351 p->o_arg.u.attrs = &p->attrs;
352 memcpy(&p->attrs, attrs, sizeof(p->attrs));
353 }
cdd4e68b
TM		 354 p->c_arg.fh = &p->o_res.fh;
355 p->c_arg.stateid = &p->o_res.stateid;
356 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 357 nfs4_init_opendata_res(p);
c6d00e63 358 kref_init(&p->kref);
e56e0b78
TM		 359 return p;
360err_free:
361 kfree(p);
362err:
363 dput(parent);
364 return NULL;
365}
366
c6d00e63 367static void nfs4_opendata_free(struct kref *kref)
e56e0b78 368{
c6d00e63
TM		 369 struct nfs4_opendata *p = container_of(kref,
370 struct nfs4_opendata, kref);
371
372 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 373 if (p->state != NULL)
374 nfs4_put_open_state(p->state);
c6d00e63
TM		 375 nfs4_put_state_owner(p->owner);
376 dput(p->dir);
31f31db1 377 path_put(&p->path);
c6d00e63
TM		 378 kfree(p);
379}
380
381static void nfs4_opendata_put(struct nfs4_opendata *p)
382{
383 if (p != NULL)
384 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 385}
386
06f814a3
TM		 387static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
388{
06f814a3
TM		 389 int ret;
390
06f814a3 391 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 392 return ret;
393}
394
dc0b027d 395static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 396{
397 int ret = 0;
dc0b027d
TM		 398
399 if (open_mode & O_EXCL)
400 goto out;
401 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 402 case FMODE_READ:
403 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 404 break;
405 case FMODE_WRITE:
406 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 407 break;
408 case FMODE_READ|FMODE_WRITE:
409 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
410 }
dc0b027d 411out:
6ee41268
TM		 412 return ret;
413}
414
dc0b027d 415static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 416{
dc0b027d 417 if ((delegation->type & fmode) != fmode)
aac00a8d 418 return 0;
15c831bf 419 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 420 return 0;
b7391f44 421 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 422 return 1;
423}
424
dc0b027d 425static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 426{
dc0b027d 427 switch (fmode) {
e7616923
TM		 428 case FMODE_WRITE:
429 state->n_wronly++;
430 break;
431 case FMODE_READ:
432 state->n_rdonly++;
433 break;
434 case FMODE_READ|FMODE_WRITE:
435 state->n_rdwr++;
436 }
dc0b027d 437 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 438}
439
dc0b027d 440static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 441{
442 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
443 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
444 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 445 switch (fmode) {
003707c7
TM		 446 case FMODE_READ:
447 set_bit(NFS_O_RDONLY_STATE, &state->flags);
448 break;
449 case FMODE_WRITE:
450 set_bit(NFS_O_WRONLY_STATE, &state->flags);
451 break;
452 case FMODE_READ|FMODE_WRITE:
453 set_bit(NFS_O_RDWR_STATE, &state->flags);
454 }
e7616923
TM		 455}
456
dc0b027d 457static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 458{
8bda4e4c 459 write_seqlock(&state->seqlock);
dc0b027d 460 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 461 write_sequnlock(&state->seqlock);
003707c7
TM		 462}
463
dc0b027d 464static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 465{
8bda4e4c
TM		 466 /*
467 * Protect the call to nfs4_state_set_mode_locked and
468 * serialise the stateid update
469 */
470 write_seqlock(&state->seqlock);
003707c7
TM		 471 if (deleg_stateid != NULL) {
472 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
473 set_bit(NFS_DELEGATED_STATE, &state->flags);
474 }
475 if (open_stateid != NULL)
dc0b027d 476 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 477 write_sequnlock(&state->seqlock);
478 spin_lock(&state->owner->so_lock);
dc0b027d 479 update_open_stateflags(state, fmode);
ec073428 480 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 481}
482
dc0b027d 483static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 484{
485 struct nfs_inode *nfsi = NFS_I(state->inode);
486 struct nfs_delegation *deleg_cur;
487 int ret = 0;
488
dc0b027d 489 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 490
491 rcu_read_lock();
492 deleg_cur = rcu_dereference(nfsi->delegation);
493 if (deleg_cur == NULL)
494 goto no_delegation;
495
496 spin_lock(&deleg_cur->lock);
497 if (nfsi->delegation != deleg_cur ||
dc0b027d 498 (deleg_cur->type & fmode) != fmode)
34310430
TM		 499 goto no_delegation_unlock;
500
501 if (delegation == NULL)
502 delegation = &deleg_cur->stateid;
503 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
504 goto no_delegation_unlock;
505
b7391f44 506 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 507 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 508 ret = 1;
509no_delegation_unlock:
510 spin_unlock(&deleg_cur->lock);
511no_delegation:
512 rcu_read_unlock();
513
514 if (!ret && open_stateid != NULL) {
dc0b027d 515 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 516 ret = 1;
517 }
518
519 return ret;
520}
521
522
dc0b027d 523static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 524{
525 struct nfs_delegation *delegation;
526
527 rcu_read_lock();
528 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 529 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 530 rcu_read_unlock();
531 return;
532 }
533 rcu_read_unlock();
534 nfs_inode_return_delegation(inode);
535}
536
6ee41268 537static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 538{
539 struct nfs4_state *state = opendata->state;
540 struct nfs_inode *nfsi = NFS_I(state->inode);
541 struct nfs_delegation *delegation;
dc0b027d
TM		 542 int open_mode = opendata->o_arg.open_flags & O_EXCL;
543 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 544 nfs4_stateid stateid;
545 int ret = -EAGAIN;
546
aac00a8d 547 for (;;) {
dc0b027d 548 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 549 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 550 if (can_open_cached(state, fmode, open_mode)) {
551 update_open_stateflags(state, fmode);
6ee41268 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 ||
dc0b027d 560 !can_open_delegated(delegation, fmode)) {
34310430 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 */
dc0b027d 573 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 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,
dc0b027d 625 data->o_arg.fmode);
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
dc0b027d 656 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 657 if (opendata == NULL)
658 return ERR_PTR(-ENOMEM);
659 opendata->state = state;
660 atomic_inc(&state->count);
661 return opendata;
662}
663
dc0b027d 664static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 665{
2ced46c2 666 struct nfs4_state *newstate;
864472e9
TM		 667 int ret;
668
dc0b027d
TM		 669 opendata->o_arg.open_flags = 0;
670 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 671 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
672 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
673 nfs4_init_opendata_res(opendata);
864472e9
TM		 674 ret = _nfs4_proc_open(opendata);
675 if (ret != 0)
676 return ret;
2ced46c2 677 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 678 if (IS_ERR(newstate))
679 return PTR_ERR(newstate);
dc0b027d 680 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 681 *res = newstate;
864472e9
TM		 682 return 0;
683}
684
685static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
686{
864472e9 687 struct nfs4_state *newstate;
864472e9
TM		 688 int ret;
689
690 /* memory barrier prior to reading state->n_* */
2ced46c2 691 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 692 smp_rmb();
693 if (state->n_rdwr != 0) {
2ced46c2 694 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 695 if (ret != 0)
696 return ret;
2ced46c2
TM		 697 if (newstate != state)
698 return -ESTALE;
864472e9
TM		 699 }
700 if (state->n_wronly != 0) {
2ced46c2 701 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 702 if (ret != 0)
703 return ret;
2ced46c2
TM		 704 if (newstate != state)
705 return -ESTALE;
864472e9
TM		 706 }
707 if (state->n_rdonly != 0) {
2ced46c2 708 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 709 if (ret != 0)
710 return ret;
2ced46c2
TM		 711 if (newstate != state)
712 return -ESTALE;
864472e9 713 }
1ac7e2fd
TM		 714 /*
715 * We may have performed cached opens for all three recoveries.
716 * Check if we need to update the current stateid.
717 */
718 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
719 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 720 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 721 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
722 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 723 write_sequnlock(&state->seqlock);
1ac7e2fd 724 }
864472e9
TM		 725 return 0;
726}
727
1da177e4
LT		 728/*
729 * OPEN_RECLAIM:
730 * reclaim state on the server after a reboot.
1da177e4 731 */
539cd03a 732static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 733{
1ac7e2fd 734 struct nfs_delegation *delegation;
864472e9 735 struct nfs4_opendata *opendata;
dc0b027d 736 fmode_t delegation_type = 0;
1da177e4
LT		 737 int status;
738
6f220ed5
TM		 739 opendata = nfs4_open_recoverdata_alloc(ctx, state);
740 if (IS_ERR(opendata))
741 return PTR_ERR(opendata);
864472e9
TM		 742 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
743 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 744 rcu_read_lock();
745 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 746 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 747 delegation_type = delegation->type;
1ac7e2fd 748 rcu_read_unlock();
864472e9
TM		 749 opendata->o_arg.u.delegation_type = delegation_type;
750 status = nfs4_open_recover(opendata, state);
c6d00e63 751 nfs4_opendata_put(opendata);
1da177e4
LT		 752 return status;
753}
754
539cd03a 755static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 756{
757 struct nfs_server *server = NFS_SERVER(state->inode);
758 struct nfs4_exception exception = { };
759 int err;
760 do {
539cd03a 761 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 762 if (err != -NFS4ERR_DELAY)
763 break;
764 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 765 } while (exception.retry);
766 return err;
767}
768
864472e9
TM		 769static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
770{
771 struct nfs_open_context *ctx;
772 int ret;
773
774 ctx = nfs4_state_find_open_context(state);
775 if (IS_ERR(ctx))
776 return PTR_ERR(ctx);
539cd03a 777 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 778 put_nfs_open_context(ctx);
779 return ret;
780}
781
13437e12 782static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 783{
e56e0b78 784 struct nfs4_opendata *opendata;
864472e9 785 int ret;
1da177e4 786
6f220ed5
TM		 787 opendata = nfs4_open_recoverdata_alloc(ctx, state);
788 if (IS_ERR(opendata))
789 return PTR_ERR(opendata);
e56e0b78 790 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 791 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 792 sizeof(opendata->o_arg.u.delegation.data));
864472e9 793 ret = nfs4_open_recover(opendata, state);
c6d00e63 794 nfs4_opendata_put(opendata);
864472e9 795 return ret;
1da177e4
LT		 796}
797
13437e12 798int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 799{
800 struct nfs4_exception exception = { };
539cd03a 801 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 802 int err;
803 do {
13437e12 804 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 805 switch (err) {
806 case 0:
807 return err;
808 case -NFS4ERR_STALE_CLIENTID:
809 case -NFS4ERR_STALE_STATEID:
810 case -NFS4ERR_EXPIRED:
811 /* Don't recall a delegation if it was lost */
7539bbab 812 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 813 return err;
814 }
815 err = nfs4_handle_exception(server, err, &exception);
816 } while (exception.retry);
817 return err;
818}
819
cdd4e68b
TM		 820static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
821{
822 struct nfs4_opendata *data = calldata;
823
824 data->rpc_status = task->tk_status;
825 if (RPC_ASSASSINATED(task))
826 return;
26e976a8 827 if (data->rpc_status == 0) {
cdd4e68b
TM		 828 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
829 sizeof(data->o_res.stateid.data));
bb22629e 830 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 831 renew_lease(data->o_res.server, data->timestamp);
3e309914 832 data->rpc_done = 1;
26e976a8 833 }
cdd4e68b
TM		 834}
835
836static void nfs4_open_confirm_release(void *calldata)
837{
838 struct nfs4_opendata *data = calldata;
839 struct nfs4_state *state = NULL;
840
841 /* If this request hasn't been cancelled, do nothing */
842 if (data->cancelled == 0)
843 goto out_free;
844 /* In case of error, no cleanup! */
3e309914 845 if (!data->rpc_done)
cdd4e68b 846 goto out_free;
cdd4e68b 847 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 848 if (!IS_ERR(state))
dc0b027d 849 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 850out_free:
c6d00e63 851 nfs4_opendata_put(data);
cdd4e68b
TM		 852}
853
854static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 855 .rpc_call_done = nfs4_open_confirm_done,
856 .rpc_release = nfs4_open_confirm_release,
857};
858
859/*
860 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
861 */
862static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
863{
864 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
865 struct rpc_task *task;
5138fde0
TM		 866 struct rpc_message msg = {
867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
868 .rpc_argp = &data->c_arg,
869 .rpc_resp = &data->c_res,
870 .rpc_cred = data->owner->so_cred,
871 };
c970aa85
TM		 872 struct rpc_task_setup task_setup_data = {
873 .rpc_client = server->client,
5138fde0 874 .rpc_message = &msg,
c970aa85
TM		 875 .callback_ops = &nfs4_open_confirm_ops,
876 .callback_data = data,
101070ca 877 .workqueue = nfsiod_workqueue,
c970aa85
TM		 878 .flags = RPC_TASK_ASYNC,
879 };
1da177e4
LT		 880 int status;
881
c6d00e63 882 kref_get(&data->kref);
3e309914
TM		 883 data->rpc_done = 0;
884 data->rpc_status = 0;
5138fde0 885 data->timestamp = jiffies;
c970aa85 886 task = rpc_run_task(&task_setup_data);
7a1218a2 887 if (IS_ERR(task))
cdd4e68b 888 return PTR_ERR(task);
cdd4e68b
TM		 889 status = nfs4_wait_for_completion_rpc_task(task);
890 if (status != 0) {
891 data->cancelled = 1;
892 smp_wmb();
893 } else
894 status = data->rpc_status;
e6b3c4db 895 rpc_put_task(task);
1da177e4
LT		 896 return status;
897}
898
24ac23ab 899static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 900{
24ac23ab
TM		 901 struct nfs4_opendata *data = calldata;
902 struct nfs4_state_owner *sp = data->owner;
5138fde0 903
24ac23ab
TM		 904 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
905 return;
aac00a8d
TM		 906 /*
907 * Check if we still need to send an OPEN call, or if we can use
908 * a delegation instead.
909 */
910 if (data->state != NULL) {
911 struct nfs_delegation *delegation;
912
dc0b027d 913 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 914 goto out_no_action;
aac00a8d
TM		 915 rcu_read_lock();
916 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
917 if (delegation != NULL &&
15c831bf 918 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 919 rcu_read_unlock();
6ee41268 920 goto out_no_action;
aac00a8d
TM		 921 }
922 rcu_read_unlock();
923 }
24ac23ab 924 /* Update sequence id. */
9f958ab8 925 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 926 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 927 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 928 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 929 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
930 }
26e976a8 931 data->timestamp = jiffies;
5138fde0 932 rpc_call_start(task);
6ee41268
TM		 933 return;
934out_no_action:
935 task->tk_action = NULL;
936
24ac23ab 937}
1da177e4 938
24ac23ab
TM		 939static void nfs4_open_done(struct rpc_task *task, void *calldata)
940{
941 struct nfs4_opendata *data = calldata;
1da177e4 942
24ac23ab
TM		 943 data->rpc_status = task->tk_status;
944 if (RPC_ASSASSINATED(task))
945 return;
946 if (task->tk_status == 0) {
947 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 948 case S_IFREG:
949 break;
950 case S_IFLNK:
24ac23ab 951 data->rpc_status = -ELOOP;
6f926b5b
TM		 952 break;
953 case S_IFDIR:
24ac23ab 954 data->rpc_status = -EISDIR;
6f926b5b
TM		 955 break;
956 default:
24ac23ab 957 data->rpc_status = -ENOTDIR;
6f926b5b 958 }
26e976a8 959 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 960 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
961 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 962 }
3e309914 963 data->rpc_done = 1;
24ac23ab 964}
6f926b5b 965
24ac23ab
TM		 966static void nfs4_open_release(void *calldata)
967{
968 struct nfs4_opendata *data = calldata;
969 struct nfs4_state *state = NULL;
970
971 /* If this request hasn't been cancelled, do nothing */
972 if (data->cancelled == 0)
973 goto out_free;
974 /* In case of error, no cleanup! */
3e309914 975 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 976 goto out_free;
977 /* In case we need an open_confirm, no cleanup! */
978 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
979 goto out_free;
24ac23ab 980 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 981 if (!IS_ERR(state))
dc0b027d 982 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 983out_free:
c6d00e63 984 nfs4_opendata_put(data);
24ac23ab
TM		 985}
986
987static const struct rpc_call_ops nfs4_open_ops = {
988 .rpc_call_prepare = nfs4_open_prepare,
989 .rpc_call_done = nfs4_open_done,
990 .rpc_release = nfs4_open_release,
991};
992
993/*
994 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
995 */
996static int _nfs4_proc_open(struct nfs4_opendata *data)
997{
998 struct inode *dir = data->dir->d_inode;
999 struct nfs_server *server = NFS_SERVER(dir);
1000 struct nfs_openargs *o_arg = &data->o_arg;
1001 struct nfs_openres *o_res = &data->o_res;
1002 struct rpc_task *task;
5138fde0
TM		 1003 struct rpc_message msg = {
1004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1005 .rpc_argp = o_arg,
1006 .rpc_resp = o_res,
1007 .rpc_cred = data->owner->so_cred,
1008 };
c970aa85
TM		 1009 struct rpc_task_setup task_setup_data = {
1010 .rpc_client = server->client,
5138fde0 1011 .rpc_message = &msg,
c970aa85
TM		 1012 .callback_ops = &nfs4_open_ops,
1013 .callback_data = data,
101070ca 1014 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1015 .flags = RPC_TASK_ASYNC,
1016 };
24ac23ab
TM		 1017 int status;
1018
c6d00e63 1019 kref_get(&data->kref);
3e309914
TM		 1020 data->rpc_done = 0;
1021 data->rpc_status = 0;
2ced46c2 1022 data->cancelled = 0;
c970aa85 1023 task = rpc_run_task(&task_setup_data);
7a1218a2 1024 if (IS_ERR(task))
24ac23ab 1025 return PTR_ERR(task);
24ac23ab
TM		 1026 status = nfs4_wait_for_completion_rpc_task(task);
1027 if (status != 0) {
1028 data->cancelled = 1;
1029 smp_wmb();
1030 } else
1031 status = data->rpc_status;
e6b3c4db 1032 rpc_put_task(task);
3e309914 1033 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1034 return status;
1035
9936781d
TM		 1036 if (o_res->fh.size == 0)
1037 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1038
56ae19f3
TM		 1039 if (o_arg->open_flags & O_CREAT) {
1040 update_changeattr(dir, &o_res->cinfo);
1041 nfs_post_op_update_inode(dir, o_res->dir_attr);
1042 } else
1043 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1044 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1045 status = _nfs4_proc_open_confirm(data);
1da177e4 1046 if (status != 0)
24ac23ab 1047 return status;
1da177e4
LT		 1048 }
1049 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1050 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1051 return 0;
1da177e4
LT		 1052}
1053
10afec90 1054static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1055{
7539bbab 1056 struct nfs_client *clp = server->nfs_client;
6b30954e 1057 int ret;
58d9714a 1058
6b30954e 1059 for (;;) {
65de872e 1060 ret = nfs4_wait_clnt_recover(clp);
6b30954e
TM		 1061 if (ret != 0)
1062 return ret;
e598d843
TM		 1063 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1064 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1065 break;
58d9714a 1066 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 1067 }
1068 return 0;
58d9714a
TM		 1069}
1070
1da177e4
LT		 1071/*
1072 * OPEN_EXPIRED:
1073 * reclaim state on the server after a network partition.
1074 * Assumes caller holds the appropriate lock
1075 */
539cd03a 1076static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1077{
e56e0b78 1078 struct nfs4_opendata *opendata;
864472e9 1079 int ret;
1da177e4 1080
6f220ed5
TM		 1081 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1082 if (IS_ERR(opendata))
1083 return PTR_ERR(opendata);
864472e9 1084 ret = nfs4_open_recover(opendata, state);
35d05778 1085 if (ret == -ESTALE)
539cd03a 1086 d_drop(ctx->path.dentry);
c6d00e63 1087 nfs4_opendata_put(opendata);
864472e9 1088 return ret;
1da177e4
LT		 1089}
1090
539cd03a 1091static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1092{
539cd03a 1093 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1094 struct nfs4_exception exception = { };
1095 int err;
1096
1097 do {
539cd03a 1098 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM		 1099 if (err != -NFS4ERR_DELAY)
1100 break;
1101 nfs4_handle_exception(server, err, &exception);
202b50dc
TM		 1102 } while (exception.retry);
1103 return err;
1104}
1105
1da177e4
LT		 1106static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1107{
1da177e4 1108 struct nfs_open_context *ctx;
864472e9 1109 int ret;
1da177e4 1110
864472e9
TM		 1111 ctx = nfs4_state_find_open_context(state);
1112 if (IS_ERR(ctx))
1113 return PTR_ERR(ctx);
539cd03a 1114 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1115 put_nfs_open_context(ctx);
1116 return ret;
1da177e4
LT		 1117}
1118
aa53ed54
JL		 1119/*
1120 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1121 * fields corresponding to attributes that were used to store the verifier.
1122 * Make sure we clobber those fields in the later setattr call
1123 */
1124static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1125{
1126 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1127 !(sattr->ia_valid & ATTR_ATIME_SET))
1128 sattr->ia_valid |= ATTR_ATIME;
1129
1130 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1131 !(sattr->ia_valid & ATTR_MTIME_SET))
1132 sattr->ia_valid |= ATTR_MTIME;
1133}
1134
1da177e4 1135/*
24ac23ab 1136 * Returns a referenced nfs4_state
1da177e4 1137 */
dc0b027d 1138static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1139{
1140 struct nfs4_state_owner *sp;
1141 struct nfs4_state *state = NULL;
1142 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1143 struct nfs4_opendata *opendata;
aac00a8d 1144 int status;
1da177e4
LT		 1145
1146 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1147 status = -ENOMEM;
1148 if (!(sp = nfs4_get_state_owner(server, cred))) {
1149 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1150 goto out_err;
1151 }
58d9714a
TM		 1152 status = nfs4_recover_expired_lease(server);
1153 if (status != 0)
b4454fe1 1154 goto err_put_state_owner;
aac00a8d 1155 if (path->dentry->d_inode != NULL)
dc0b027d 1156 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1157 status = -ENOMEM;
dc0b027d 1158 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1159 if (opendata == NULL)
95d35cb4 1160 goto err_put_state_owner;
1da177e4 1161
aac00a8d
TM		 1162 if (path->dentry->d_inode != NULL)
1163 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1164
24ac23ab 1165 status = _nfs4_proc_open(opendata);
1da177e4 1166 if (status != 0)
c6d00e63 1167 goto err_opendata_put;
1da177e4 1168
aa53ed54
JL		 1169 if (opendata->o_arg.open_flags & O_EXCL)
1170 nfs4_exclusive_attrset(opendata, sattr);
1171
24ac23ab 1172 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1173 status = PTR_ERR(state);
1174 if (IS_ERR(state))
c6d00e63 1175 goto err_opendata_put;
c6d00e63 1176 nfs4_opendata_put(opendata);
1da177e4 1177 nfs4_put_state_owner(sp);
1da177e4
LT		 1178 *res = state;
1179 return 0;
c6d00e63
TM		 1180err_opendata_put:
1181 nfs4_opendata_put(opendata);
e56e0b78
TM		 1182err_put_state_owner:
1183 nfs4_put_state_owner(sp);
1da177e4 1184out_err:
1da177e4
LT		 1185 *res = NULL;
1186 return status;
1187}
1188
1189
dc0b027d 1190static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1191{
1192 struct nfs4_exception exception = { };
1193 struct nfs4_state *res;
1194 int status;
1195
1196 do {
dc0b027d 1197 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1198 if (status == 0)
1199 break;
1200 /* NOTE: BAD_SEQID means the server and client disagree about the
1201 * book-keeping w.r.t. state-changing operations
1202 * (OPEN/CLOSE/LOCK/LOCKU...)
1203 * It is actually a sign of a bug on the client or on the server.
1204 *
1205 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1206 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1207 * have unhashed the old state_owner for us, and that we can
1208 * therefore safely retry using a new one. We should still warn
1209 * the user though...
1210 */
1211 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1212 printk(KERN_WARNING "NFS: v4 server %s "
1213 " returned a bad sequence-id error!\n",
1214 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1215 exception.retry = 1;
1216 continue;
1217 }
550f5747
TM		 1218 /*
1219 * BAD_STATEID on OPEN means that the server cancelled our
1220 * state before it received the OPEN_CONFIRM.
1221 * Recover by retrying the request as per the discussion
1222 * on Page 181 of RFC3530.
1223 */
1224 if (status == -NFS4ERR_BAD_STATEID) {
1225 exception.retry = 1;
1226 continue;
1227 }
aac00a8d
TM		 1228 if (status == -EAGAIN) {
1229 /* We must have found a delegation */
1230 exception.retry = 1;
1231 continue;
1232 }
1da177e4
LT		 1233 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1234 status, &exception));
1235 } while (exception.retry);
1236 return res;
1237}
1238
659bfcd6
TM		 1239static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1240 struct nfs_fattr *fattr, struct iattr *sattr,
1241 struct nfs4_state *state)
1da177e4 1242{
3e4f6290 1243 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1244 struct nfs_setattrargs arg = {
3e4f6290 1245 .fh = NFS_FH(inode),
1da177e4
LT		 1246 .iap = sattr,
1247 .server = server,
1248 .bitmask = server->attr_bitmask,
1249 };
1250 struct nfs_setattrres res = {
1251 .fattr = fattr,
1252 .server = server,
1253 };
1254 struct rpc_message msg = {
659bfcd6
TM		 1255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1256 .rpc_argp = &arg,
1257 .rpc_resp = &res,
1258 .rpc_cred = cred,
1da177e4 1259 };
26e976a8 1260 unsigned long timestamp = jiffies;
65e4308d 1261 int status;
1da177e4 1262
0e574af1 1263 nfs_fattr_init(fattr);
1da177e4 1264
3e4f6290
TM		 1265 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1266 /* Use that stateid */
1267 } else if (state != NULL) {
08e9eac4
TM		 1268 nfs4_copy_stateid(&arg.stateid, state, current->files);
1269 } else
1da177e4
LT		 1270 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1271
65e4308d 1272 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1273 if (status == 0 && state != NULL)
1274 renew_lease(server, timestamp);
65e4308d 1275 return status;
1da177e4
LT		 1276}
1277
659bfcd6
TM		 1278static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1279 struct nfs_fattr *fattr, struct iattr *sattr,
1280 struct nfs4_state *state)
1da177e4 1281{
3e4f6290 1282 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1283 struct nfs4_exception exception = { };
1284 int err;
1285 do {
1286 err = nfs4_handle_exception(server,
659bfcd6 1287 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1288 &exception);
1289 } while (exception.retry);
1290 return err;
1291}
1292
1293struct nfs4_closedata {
4a35bd41 1294 struct path path;
1da177e4
LT		 1295 struct inode *inode;
1296 struct nfs4_state *state;
1297 struct nfs_closeargs arg;
1298 struct nfs_closeres res;
516a6af6 1299 struct nfs_fattr fattr;
26e976a8 1300 unsigned long timestamp;
1da177e4
LT		 1301};
1302
963d8fe5 1303static void nfs4_free_closedata(void *data)
9512135d 1304{
963d8fe5
TM		 1305 struct nfs4_closedata *calldata = data;
1306 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1307
1308 nfs4_put_open_state(calldata->state);
1309 nfs_free_seqid(calldata->arg.seqid);
9512135d 1310 nfs4_put_state_owner(sp);
31f31db1 1311 path_put(&calldata->path);
9512135d
TM		 1312 kfree(calldata);
1313}
1314
963d8fe5 1315static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1316{
963d8fe5 1317 struct nfs4_closedata *calldata = data;
1da177e4 1318 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1319 struct nfs_server *server = NFS_SERVER(calldata->inode);
1320
4ce70ada
TM		 1321 if (RPC_ASSASSINATED(task))
1322 return;
1da177e4
LT		 1323 /* hmm. we are done with the inode, and in the process of freeing
1324 * the state_owner. we keep this around to process errors
1325 */
1da177e4
LT		 1326 switch (task->tk_status) {
1327 case 0:
45328c35 1328 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1329 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1330 break;
1331 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1332 case -NFS4ERR_OLD_STATEID:
1333 case -NFS4ERR_BAD_STATEID:
1da177e4 1334 case -NFS4ERR_EXPIRED:
dc0b027d 1335 if (calldata->arg.fmode == 0)
9e33bed5 1336 break;
1da177e4 1337 default:
9e33bed5 1338 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1da177e4
LT		 1339 rpc_restart_call(task);
1340 return;
1341 }
1342 }
516a6af6 1343 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1344}
1345
4ce70ada 1346static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1347{
4ce70ada 1348 struct nfs4_closedata *calldata = data;
9512135d 1349 struct nfs4_state *state = calldata->state;
003707c7 1350 int clear_rd, clear_wr, clear_rdwr;
9512135d 1351
963d8fe5 1352 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1353 return;
003707c7 1354
003707c7 1355 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1356 spin_lock(&state->owner->so_lock);
003707c7 1357 /* Calculate the change in open mode */
e7616923 1358 if (state->n_rdwr == 0) {
003707c7 1359 if (state->n_rdonly == 0) {
003707c7
TM		 1360 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1361 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1362 }
1363 if (state->n_wronly == 0) {
003707c7
TM		 1364 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1365 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1366 }
e7616923 1367 }
4cecb76f 1368 spin_unlock(&state->owner->so_lock);
003707c7 1369 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1370 /* Note: exit _without_ calling nfs4_close_done */
1371 task->tk_action = NULL;
9512135d
TM		 1372 return;
1373 }
516a6af6 1374 nfs_fattr_init(calldata->res.fattr);
45328c35 1375 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1376 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1377 calldata->arg.fmode = FMODE_READ;
45328c35 1378 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1379 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1380 calldata->arg.fmode = FMODE_WRITE;
45328c35 1381 }
26e976a8 1382 calldata->timestamp = jiffies;
5138fde0 1383 rpc_call_start(task);
1da177e4
LT		 1384}
1385
963d8fe5 1386static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1387 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1388 .rpc_call_done = nfs4_close_done,
1389 .rpc_release = nfs4_free_closedata,
1390};
1391
1da177e4
LT		 1392/*
1393 * It is possible for data to be read/written from a mem-mapped file
1394 * after the sys_close call (which hits the vfs layer as a flush).
1395 * This means that we can't safely call nfsv4 close on a file until
1396 * the inode is cleared. This in turn means that we are not good
1397 * NFSv4 citizens - we do not indicate to the server to update the file's
1398 * share state even when we are done with one of the three share
1399 * stateid's in the inode.
1400 *
1401 * NOTE: Caller must be holding the sp->so_owner semaphore!
1402 */
a49c3c77 1403int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1404{
4a35bd41 1405 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1406 struct nfs4_closedata *calldata;
b39e625b
TM		 1407 struct nfs4_state_owner *sp = state->owner;
1408 struct rpc_task *task;
5138fde0
TM		 1409 struct rpc_message msg = {
1410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1411 .rpc_cred = state->owner->so_cred,
1412 };
c970aa85
TM		 1413 struct rpc_task_setup task_setup_data = {
1414 .rpc_client = server->client,
5138fde0 1415 .rpc_message = &msg,
c970aa85 1416 .callback_ops = &nfs4_close_ops,
101070ca 1417 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1418 .flags = RPC_TASK_ASYNC,
1419 };
9512135d 1420 int status = -ENOMEM;
1da177e4 1421
9512135d 1422 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1423 if (calldata == NULL)
9512135d 1424 goto out;
4a35bd41 1425 calldata->inode = state->inode;
1da177e4 1426 calldata->state = state;
4a35bd41 1427 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1428 calldata->arg.stateid = &state->open_stateid;
1da177e4 1429 /* Serialization for the sequence id */
cee54fc9 1430 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1431 if (calldata->arg.seqid == NULL)
1432 goto out_free_calldata;
dc0b027d 1433 calldata->arg.fmode = 0;
a65318bf 1434 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1435 calldata->res.fattr = &calldata->fattr;
c1d51931 1436 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1437 calldata->res.server = server;
4a35bd41
TM		 1438 calldata->path.mnt = mntget(path->mnt);
1439 calldata->path.dentry = dget(path->dentry);
9512135d 1440
5138fde0
TM		 1441 msg.rpc_argp = &calldata->arg,
1442 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1443 task_setup_data.callback_data = calldata;
1444 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1445 if (IS_ERR(task))
1446 return PTR_ERR(task);
a49c3c77
TM		 1447 status = 0;
1448 if (wait)
1449 status = rpc_wait_for_completion_task(task);
b39e625b 1450 rpc_put_task(task);
a49c3c77 1451 return status;
9512135d
TM		 1452out_free_calldata:
1453 kfree(calldata);
1454out:
b39e625b
TM		 1455 nfs4_put_open_state(state);
1456 nfs4_put_state_owner(sp);
9512135d 1457 return status;
1da177e4
LT		 1458}
1459
dc0b027d 1460static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1461{
1462 struct file *filp;
1b45c46c 1463 int ret;
02a913a7 1464
1b45c46c 1465 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1466 if (fmode & FMODE_EXEC) {
af22f94a 1467 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1468 state->owner->so_cred,
1469 nd->intent.open.flags);
1470 if (ret < 0)
1471 goto out_close;
1472 }
4a35bd41 1473 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1474 if (!IS_ERR(filp)) {
1475 struct nfs_open_context *ctx;
cd3758e3 1476 ctx = nfs_file_open_context(filp);
02a913a7 1477 ctx->state = state;
95cf959b
TM		 1478 return 0;
1479 }
1b45c46c
TM		 1480 ret = PTR_ERR(filp);
1481out_close:
dc0b027d 1482 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1483 return ret;
02a913a7
TM		 1484}
1485
1486struct dentry *
1da177e4
LT		 1487nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1488{
ad389da7 1489 struct path path = {
4ac91378 1490 .mnt = nd->path.mnt,
ad389da7
TM		 1491 .dentry = dentry,
1492 };
4ac91378 1493 struct dentry *parent;
1da177e4
LT		 1494 struct iattr attr;
1495 struct rpc_cred *cred;
1496 struct nfs4_state *state;
02a913a7 1497 struct dentry *res;
dc0b027d 1498 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1499
1500 if (nd->flags & LOOKUP_CREATE) {
1501 attr.ia_mode = nd->intent.open.create_mode;
1502 attr.ia_valid = ATTR_MODE;
1503 if (!IS_POSIXACL(dir))
ce3b0f8d 1504 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1505 } else {
1506 attr.ia_valid = 0;
1507 BUG_ON(nd->intent.open.flags & O_CREAT);
1508 }
1509
98a8e323 1510 cred = rpc_lookup_cred();
1da177e4 1511 if (IS_ERR(cred))
02a913a7 1512 return (struct dentry *)cred;
565277f6
TM		 1513 parent = dentry->d_parent;
1514 /* Protect against concurrent sillydeletes */
1515 nfs_block_sillyrename(parent);
dc0b027d 1516 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1517 put_rpccred(cred);
02a913a7 1518 if (IS_ERR(state)) {
d75340cc 1519 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1520 d_add(dentry, NULL);
d75340cc
TM		 1521 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1522 }
565277f6 1523 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1524 return (struct dentry *)state;
1525 }
24ac23ab 1526 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1527 if (res != NULL)
deee9369 1528 path.dentry = res;
d75340cc 1529 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1530 nfs_unblock_sillyrename(parent);
dc0b027d 1531 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1532 return res;
1da177e4
LT		 1533}
1534
1535int
02a913a7 1536nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1537{
ad389da7 1538 struct path path = {
4ac91378 1539 .mnt = nd->path.mnt,
ad389da7
TM		 1540 .dentry = dentry,
1541 };
1da177e4
LT		 1542 struct rpc_cred *cred;
1543 struct nfs4_state *state;
dc0b027d 1544 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1545
98a8e323 1546 cred = rpc_lookup_cred();
1da177e4
LT		 1547 if (IS_ERR(cred))
1548 return PTR_ERR(cred);
dc0b027d 1549 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1550 put_rpccred(cred);
02a913a7
TM		 1551 if (IS_ERR(state)) {
1552 switch (PTR_ERR(state)) {
1553 case -EPERM:
1554 case -EACCES:
1555 case -EDQUOT:
1556 case -ENOSPC:
1557 case -EROFS:
1558 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1559 return 1;
b87c0adf
CL		 1560 default:
1561 goto out_drop;
02a913a7 1562 }
02a913a7 1563 }
24ac23ab 1564 if (state->inode == dentry->d_inode) {
d75340cc 1565 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1566 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1567 return 1;
1568 }
dc0b027d 1569 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1570out_drop:
1571 d_drop(dentry);
1da177e4
LT		 1572 return 0;
1573}
1574
7fe5c398
TM		 1575void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1576{
1577 if (ctx->state == NULL)
1578 return;
1579 if (is_sync)
1580 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1581 else
1582 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1583}
1da177e4
LT		 1584
1585static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1586{
43652ad5
BH		 1587 struct nfs4_server_caps_arg args = {
1588 .fhandle = fhandle,
1589 };
1da177e4
LT		 1590 struct nfs4_server_caps_res res = {};
1591 struct rpc_message msg = {
1592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 1593 .rpc_argp = &args,
1da177e4
LT		 1594 .rpc_resp = &res,
1595 };
1596 int status;
1597
1598 status = rpc_call_sync(server->client, &msg, 0);
1599 if (status == 0) {
1600 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1601 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1602 server->caps |= NFS_CAP_ACLS;
1603 if (res.has_links != 0)
1604 server->caps |= NFS_CAP_HARDLINKS;
1605 if (res.has_symlinks != 0)
1606 server->caps |= NFS_CAP_SYMLINKS;
a65318bf
TM		 1607 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1608 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1609 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 1610 server->acl_bitmask = res.acl_bitmask;
1611 }
1612 return status;
1613}
1614
55a97593 1615int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1616{
1617 struct nfs4_exception exception = { };
1618 int err;
1619 do {
1620 err = nfs4_handle_exception(server,
1621 _nfs4_server_capabilities(server, fhandle),
1622 &exception);
1623 } while (exception.retry);
1624 return err;
1625}
1626
1627static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1628 struct nfs_fsinfo *info)
1629{
1da177e4
LT		 1630 struct nfs4_lookup_root_arg args = {
1631 .bitmask = nfs4_fattr_bitmap,
1632 };
1633 struct nfs4_lookup_res res = {
1634 .server = server,
0e574af1 1635 .fattr = info->fattr,
1da177e4
LT		 1636 .fh = fhandle,
1637 };
1638 struct rpc_message msg = {
1639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1640 .rpc_argp = &args,
1641 .rpc_resp = &res,
1642 };
0e574af1 1643 nfs_fattr_init(info->fattr);
1da177e4
LT		 1644 return rpc_call_sync(server->client, &msg, 0);
1645}
1646
1647static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1648 struct nfs_fsinfo *info)
1649{
1650 struct nfs4_exception exception = { };
1651 int err;
1652 do {
1653 err = nfs4_handle_exception(server,
1654 _nfs4_lookup_root(server, fhandle, info),
1655 &exception);
1656 } while (exception.retry);
1657 return err;
1658}
1659
54ceac45
DH		 1660/*
1661 * get the file handle for the "/" directory on the server
1662 */
1da177e4 1663static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1664 struct nfs_fsinfo *info)
1da177e4 1665{
1da177e4
LT		 1666 int status;
1667
1da177e4 1668 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1669 if (status == 0)
1670 status = nfs4_server_capabilities(server, fhandle);
1671 if (status == 0)
1672 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1673 return nfs4_map_errors(status);
1da177e4
LT		 1674}
1675
6b97fd3d
MN		 1676/*
1677 * Get locations and (maybe) other attributes of a referral.
1678 * Note that we'll actually follow the referral later when
1679 * we detect fsid mismatch in inode revalidation
1680 */
56659e99 1681static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1682{
1683 int status = -ENOMEM;
1684 struct page *page = NULL;
1685 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1686
1687 page = alloc_page(GFP_KERNEL);
1688 if (page == NULL)
1689 goto out;
1690 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1691 if (locations == NULL)
1692 goto out;
1693
c228fd3a 1694 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1695 if (status != 0)
1696 goto out;
1697 /* Make sure server returned a different fsid for the referral */
1698 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 1699 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 1700 status = -EIO;
1701 goto out;
1702 }
1703
1704 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1705 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1706 if (!fattr->mode)
1707 fattr->mode = S_IFDIR;
1708 memset(fhandle, 0, sizeof(struct nfs_fh));
1709out:
1710 if (page)
1711 __free_page(page);
1712 if (locations)
1713 kfree(locations);
1714 return status;
1715}
1716
1da177e4
LT		 1717static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1718{
1719 struct nfs4_getattr_arg args = {
1720 .fh = fhandle,
1721 .bitmask = server->attr_bitmask,
1722 };
1723 struct nfs4_getattr_res res = {
1724 .fattr = fattr,
1725 .server = server,
1726 };
1727 struct rpc_message msg = {
1728 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1729 .rpc_argp = &args,
1730 .rpc_resp = &res,
1731 };
1732
0e574af1 1733 nfs_fattr_init(fattr);
1da177e4
LT		 1734 return rpc_call_sync(server->client, &msg, 0);
1735}
1736
1737static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1738{
1739 struct nfs4_exception exception = { };
1740 int err;
1741 do {
1742 err = nfs4_handle_exception(server,
1743 _nfs4_proc_getattr(server, fhandle, fattr),
1744 &exception);
1745 } while (exception.retry);
1746 return err;
1747}
1748
1749/*
1750 * The file is not closed if it is opened due to the a request to change
1751 * the size of the file. The open call will not be needed once the
1752 * VFS layer lookup-intents are implemented.
1753 *
1754 * Close is called when the inode is destroyed.
1755 * If we haven't opened the file for O_WRONLY, we
1756 * need to in the size_change case to obtain a stateid.
1757 *
1758 * Got race?
1759 * Because OPEN is always done by name in nfsv4, it is
1760 * possible that we opened a different file by the same
1761 * name. We can recognize this race condition, but we
1762 * can't do anything about it besides returning an error.
1763 *
1764 * This will be fixed with VFS changes (lookup-intent).
1765 */
1766static int
1767nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1768 struct iattr *sattr)
1769{
08e9eac4 1770 struct inode *inode = dentry->d_inode;
659bfcd6 1771 struct rpc_cred *cred = NULL;
d530838b 1772 struct nfs4_state *state = NULL;
1da177e4
LT		 1773 int status;
1774
0e574af1 1775 nfs_fattr_init(fattr);
1da177e4 1776
d530838b 1777 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 1778 if (sattr->ia_valid & ATTR_FILE) {
1779 struct nfs_open_context *ctx;
1780
1781 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 1782 if (ctx) {
1783 cred = ctx->cred;
1784 state = ctx->state;
1785 }
659bfcd6 1786 }
08e9eac4 1787
659bfcd6 1788 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 1789 if (status == 0)
1790 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 1791 return status;
1792}
1793
56659e99
TM		 1794static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1795 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1796 struct nfs_fattr *fattr)
1797{
1798 int status;
1799 struct nfs4_lookup_arg args = {
1800 .bitmask = server->attr_bitmask,
1801 .dir_fh = dirfh,
1802 .name = name,
1803 };
1804 struct nfs4_lookup_res res = {
1805 .server = server,
1806 .fattr = fattr,
1807 .fh = fhandle,
1808 };
1809 struct rpc_message msg = {
1810 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1811 .rpc_argp = &args,
1812 .rpc_resp = &res,
1813 };
1814
1815 nfs_fattr_init(fattr);
1816
1817 dprintk("NFS call lookupfh %s\n", name->name);
1818 status = rpc_call_sync(server->client, &msg, 0);
1819 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1820 return status;
1821}
1822
1823static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1824 struct qstr *name, struct nfs_fh *fhandle,
1825 struct nfs_fattr *fattr)
1826{
1827 struct nfs4_exception exception = { };
1828 int err;
1829 do {
4e56e082
TM		 1830 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1831 /* FIXME: !!!! */
1832 if (err == -NFS4ERR_MOVED) {
1833 err = -EREMOTE;
1834 break;
1835 }
1836 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1837 } while (exception.retry);
1838 return err;
1839}
1840
56659e99 1841static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1842 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1843{
4e56e082 1844 int status;
1da177e4
LT		 1845
1846 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1847 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1848 if (status == -NFS4ERR_MOVED)
1849 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1850 dprintk("NFS reply lookup: %d\n", status);
1851 return status;
1852}
1853
1854static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1855{
1856 struct nfs4_exception exception = { };
1857 int err;
1858 do {
1859 err = nfs4_handle_exception(NFS_SERVER(dir),
1860 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1861 &exception);
1862 } while (exception.retry);
1863 return err;
1864}
1865
1866static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1867{
76b32999
TM		 1868 struct nfs_server *server = NFS_SERVER(inode);
1869 struct nfs_fattr fattr;
1da177e4
LT		 1870 struct nfs4_accessargs args = {
1871 .fh = NFS_FH(inode),
76b32999
TM		 1872 .bitmask = server->attr_bitmask,
1873 };
1874 struct nfs4_accessres res = {
1875 .server = server,
1876 .fattr = &fattr,
1da177e4 1877 };
1da177e4
LT		 1878 struct rpc_message msg = {
1879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1880 .rpc_argp = &args,
1881 .rpc_resp = &res,
1882 .rpc_cred = entry->cred,
1883 };
1884 int mode = entry->mask;
1885 int status;
1886
1887 /*
1888 * Determine which access bits we want to ask for...
1889 */
1890 if (mode & MAY_READ)
1891 args.access |= NFS4_ACCESS_READ;
1892 if (S_ISDIR(inode->i_mode)) {
1893 if (mode & MAY_WRITE)
1894 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1895 if (mode & MAY_EXEC)
1896 args.access |= NFS4_ACCESS_LOOKUP;
1897 } else {
1898 if (mode & MAY_WRITE)
1899 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1900 if (mode & MAY_EXEC)
1901 args.access |= NFS4_ACCESS_EXECUTE;
1902 }
76b32999 1903 nfs_fattr_init(&fattr);
1da177e4
LT		 1904 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1905 if (!status) {
1906 entry->mask = 0;
1907 if (res.access & NFS4_ACCESS_READ)
1908 entry->mask |= MAY_READ;
1909 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1910 entry->mask |= MAY_WRITE;
1911 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1912 entry->mask |= MAY_EXEC;
76b32999 1913 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1914 }
1915 return status;
1916}
1917
1918static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1919{
1920 struct nfs4_exception exception = { };
1921 int err;
1922 do {
1923 err = nfs4_handle_exception(NFS_SERVER(inode),
1924 _nfs4_proc_access(inode, entry),
1925 &exception);
1926 } while (exception.retry);
1927 return err;
1928}
1929
1930/*
1931 * TODO: For the time being, we don't try to get any attributes
1932 * along with any of the zero-copy operations READ, READDIR,
1933 * READLINK, WRITE.
1934 *
1935 * In the case of the first three, we want to put the GETATTR
1936 * after the read-type operation -- this is because it is hard
1937 * to predict the length of a GETATTR response in v4, and thus
1938 * align the READ data correctly. This means that the GETATTR
1939 * may end up partially falling into the page cache, and we should
1940 * shift it into the 'tail' of the xdr_buf before processing.
1941 * To do this efficiently, we need to know the total length
1942 * of data received, which doesn't seem to be available outside
1943 * of the RPC layer.
1944 *
1945 * In the case of WRITE, we also want to put the GETATTR after
1946 * the operation -- in this case because we want to make sure
1947 * we get the post-operation mtime and size. This means that
1948 * we can't use xdr_encode_pages() as written: we need a variant
1949 * of it which would leave room in the 'tail' iovec.
1950 *
1951 * Both of these changes to the XDR layer would in fact be quite
1952 * minor, but I decided to leave them for a subsequent patch.
1953 */
1954static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1955 unsigned int pgbase, unsigned int pglen)
1956{
1957 struct nfs4_readlink args = {
1958 .fh = NFS_FH(inode),
1959 .pgbase = pgbase,
1960 .pglen = pglen,
1961 .pages = &page,
1962 };
f50c7000 1963 struct nfs4_readlink_res res;
1da177e4
LT		 1964 struct rpc_message msg = {
1965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1966 .rpc_argp = &args,
f50c7000 1967 .rpc_resp = &res,
1da177e4
LT		 1968 };
1969
1970 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1971}
1972
1973static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1974 unsigned int pgbase, unsigned int pglen)
1975{
1976 struct nfs4_exception exception = { };
1977 int err;
1978 do {
1979 err = nfs4_handle_exception(NFS_SERVER(inode),
1980 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1981 &exception);
1982 } while (exception.retry);
1983 return err;
1984}
1985
1da177e4
LT		 1986/*
1987 * Got race?
1988 * We will need to arrange for the VFS layer to provide an atomic open.
1989 * Until then, this create/open method is prone to inefficiency and race
1990 * conditions due to the lookup, create, and open VFS calls from sys_open()
1991 * placed on the wire.
1992 *
1993 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1994 * The file will be opened again in the subsequent VFS open call
1995 * (nfs4_proc_file_open).
1996 *
1997 * The open for read will just hang around to be used by any process that
1998 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1999 */
2000
2001static int
2002nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2003 int flags, struct nameidata *nd)
1da177e4 2004{
ad389da7 2005 struct path path = {
4ac91378 2006 .mnt = nd->path.mnt,
ad389da7
TM		 2007 .dentry = dentry,
2008 };
1da177e4
LT		 2009 struct nfs4_state *state;
2010 struct rpc_cred *cred;
dc0b027d 2011 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2012 int status = 0;
2013
98a8e323 2014 cred = rpc_lookup_cred();
1da177e4
LT		 2015 if (IS_ERR(cred)) {
2016 status = PTR_ERR(cred);
2017 goto out;
2018 }
dc0b027d 2019 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2020 d_drop(dentry);
1da177e4
LT		 2021 if (IS_ERR(state)) {
2022 status = PTR_ERR(state);
659bfcd6 2023 goto out_putcred;
1da177e4 2024 }
d4d9cdcb 2025 d_add(dentry, igrab(state->inode));
d75340cc 2026 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2027 if (flags & O_EXCL) {
2028 struct nfs_fattr fattr;
659bfcd6 2029 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2030 if (status == 0)
65e4308d 2031 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2032 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2033 }
ad389da7 2034 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2035 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2036 else
dc0b027d 2037 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2038out_putcred:
2039 put_rpccred(cred);
1da177e4
LT		 2040out:
2041 return status;
2042}
2043
2044static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2045{
16e42959 2046 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2047 struct nfs_removeargs args = {
1da177e4 2048 .fh = NFS_FH(dir),
4fdc17b2
TM		 2049 .name.len = name->len,
2050 .name.name = name->name,
16e42959
TM		 2051 .bitmask = server->attr_bitmask,
2052 };
4fdc17b2 2053 struct nfs_removeres res = {
16e42959 2054 .server = server,
1da177e4 2055 };
1da177e4 2056 struct rpc_message msg = {
4fdc17b2
TM		 2057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2058 .rpc_argp = &args,
2059 .rpc_resp = &res,
1da177e4
LT		 2060 };
2061 int status;
2062
4fdc17b2 2063 nfs_fattr_init(&res.dir_attr);
16e42959
TM		 2064 status = rpc_call_sync(server->client, &msg, 0);
2065 if (status == 0) {
2066 update_changeattr(dir, &res.cinfo);
4fdc17b2 2067 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2068 }
1da177e4
LT		 2069 return status;
2070}
2071
2072static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2073{
2074 struct nfs4_exception exception = { };
2075 int err;
2076 do {
2077 err = nfs4_handle_exception(NFS_SERVER(dir),
2078 _nfs4_proc_remove(dir, name),
2079 &exception);
2080 } while (exception.retry);
2081 return err;
2082}
2083
e4eff1a6 2084static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2085{
e4eff1a6
TM		 2086 struct nfs_server *server = NFS_SERVER(dir);
2087 struct nfs_removeargs *args = msg->rpc_argp;
2088 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2089
a65318bf 2090 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2091 res->server = server;
1da177e4 2092 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2093}
2094
e4eff1a6 2095static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2096{
e4eff1a6
TM		 2097 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2098
9e33bed5 2099 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2100 return 0;
2101 update_changeattr(dir, &res->cinfo);
2102 nfs_post_op_update_inode(dir, &res->dir_attr);
2103 return 1;
1da177e4
LT		 2104}
2105
2106static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2107 struct inode *new_dir, struct qstr *new_name)
2108{
6caf2c82 2109 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2110 struct nfs4_rename_arg arg = {
2111 .old_dir = NFS_FH(old_dir),
2112 .new_dir = NFS_FH(new_dir),
2113 .old_name = old_name,
2114 .new_name = new_name,
6caf2c82
TM		 2115 .bitmask = server->attr_bitmask,
2116 };
2117 struct nfs_fattr old_fattr, new_fattr;
2118 struct nfs4_rename_res res = {
2119 .server = server,
2120 .old_fattr = &old_fattr,
2121 .new_fattr = &new_fattr,
1da177e4 2122 };
1da177e4
LT		 2123 struct rpc_message msg = {
2124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2125 .rpc_argp = &arg,
2126 .rpc_resp = &res,
2127 };
2128 int status;
2129
6caf2c82
TM		 2130 nfs_fattr_init(res.old_fattr);
2131 nfs_fattr_init(res.new_fattr);
2132 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2133
2134 if (!status) {
2135 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2136 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2137 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2138 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2139 }
2140 return status;
2141}
2142
2143static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2144 struct inode *new_dir, struct qstr *new_name)
2145{
2146 struct nfs4_exception exception = { };
2147 int err;
2148 do {
2149 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2150 _nfs4_proc_rename(old_dir, old_name,
2151 new_dir, new_name),
2152 &exception);
2153 } while (exception.retry);
2154 return err;
2155}
2156
2157static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2158{
91ba2eee 2159 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2160 struct nfs4_link_arg arg = {
2161 .fh = NFS_FH(inode),
2162 .dir_fh = NFS_FH(dir),
2163 .name = name,
91ba2eee
TM		 2164 .bitmask = server->attr_bitmask,
2165 };
2166 struct nfs_fattr fattr, dir_attr;
2167 struct nfs4_link_res res = {
2168 .server = server,
2169 .fattr = &fattr,
2170 .dir_attr = &dir_attr,
1da177e4 2171 };
1da177e4
LT		 2172 struct rpc_message msg = {
2173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2174 .rpc_argp = &arg,
91ba2eee 2175 .rpc_resp = &res,
1da177e4
LT		 2176 };
2177 int status;
2178
91ba2eee
TM		 2179 nfs_fattr_init(res.fattr);
2180 nfs_fattr_init(res.dir_attr);
2181 status = rpc_call_sync(server->client, &msg, 0);
2182 if (!status) {
2183 update_changeattr(dir, &res.cinfo);
2184 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2185 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2186 }
1da177e4
LT		 2187
2188 return status;
2189}
2190
2191static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2192{
2193 struct nfs4_exception exception = { };
2194 int err;
2195 do {
2196 err = nfs4_handle_exception(NFS_SERVER(inode),
2197 _nfs4_proc_link(inode, dir, name),
2198 &exception);
2199 } while (exception.retry);
2200 return err;
2201}
2202
57dc9a57
TM		 2203struct nfs4_createdata {
2204 struct rpc_message msg;
2205 struct nfs4_create_arg arg;
2206 struct nfs4_create_res res;
2207 struct nfs_fh fh;
2208 struct nfs_fattr fattr;
2209 struct nfs_fattr dir_fattr;
2210};
2211
2212static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2213 struct qstr *name, struct iattr *sattr, u32 ftype)
2214{
2215 struct nfs4_createdata *data;
2216
2217 data = kzalloc(sizeof(*data), GFP_KERNEL);
2218 if (data != NULL) {
2219 struct nfs_server *server = NFS_SERVER(dir);
2220
2221 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2222 data->msg.rpc_argp = &data->arg;
2223 data->msg.rpc_resp = &data->res;
2224 data->arg.dir_fh = NFS_FH(dir);
2225 data->arg.server = server;
2226 data->arg.name = name;
2227 data->arg.attrs = sattr;
2228 data->arg.ftype = ftype;
2229 data->arg.bitmask = server->attr_bitmask;
2230 data->res.server = server;
2231 data->res.fh = &data->fh;
2232 data->res.fattr = &data->fattr;
2233 data->res.dir_fattr = &data->dir_fattr;
2234 nfs_fattr_init(data->res.fattr);
2235 nfs_fattr_init(data->res.dir_fattr);
2236 }
2237 return data;
2238}
2239
2240static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2241{
2242 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2243 if (status == 0) {
2244 update_changeattr(dir, &data->res.dir_cinfo);
2245 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2246 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2247 }
2248 return status;
2249}
2250
2251static void nfs4_free_createdata(struct nfs4_createdata *data)
2252{
2253 kfree(data);
2254}
2255
4f390c15 2256static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2257 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2258{
57dc9a57
TM		 2259 struct nfs4_createdata *data;
2260 int status = -ENAMETOOLONG;
1da177e4 2261
94a6d753 2262 if (len > NFS4_MAXPATHLEN)
57dc9a57 2263 goto out;
4f390c15 2264
57dc9a57
TM		 2265 status = -ENOMEM;
2266 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2267 if (data == NULL)
2268 goto out;
2269
2270 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2271 data->arg.u.symlink.pages = &page;
2272 data->arg.u.symlink.len = len;
1da177e4 2273
57dc9a57
TM		 2274 status = nfs4_do_create(dir, dentry, data);
2275
2276 nfs4_free_createdata(data);
2277out:
1da177e4
LT		 2278 return status;
2279}
2280
4f390c15 2281static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2282 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2283{
2284 struct nfs4_exception exception = { };
2285 int err;
2286 do {
2287 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2288 _nfs4_proc_symlink(dir, dentry, page,
2289 len, sattr),
1da177e4
LT		 2290 &exception);
2291 } while (exception.retry);
2292 return err;
2293}
2294
2295static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2296 struct iattr *sattr)
2297{
57dc9a57
TM		 2298 struct nfs4_createdata *data;
2299 int status = -ENOMEM;
1da177e4 2300
57dc9a57
TM		 2301 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2302 if (data == NULL)
2303 goto out;
2304
2305 status = nfs4_do_create(dir, dentry, data);
2306
2307 nfs4_free_createdata(data);
2308out:
1da177e4
LT		 2309 return status;
2310}
2311
2312static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2313 struct iattr *sattr)
2314{
2315 struct nfs4_exception exception = { };
2316 int err;
2317 do {
2318 err = nfs4_handle_exception(NFS_SERVER(dir),
2319 _nfs4_proc_mkdir(dir, dentry, sattr),
2320 &exception);
2321 } while (exception.retry);
2322 return err;
2323}
2324
2325static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2326 u64 cookie, struct page *page, unsigned int count, int plus)
2327{
2328 struct inode *dir = dentry->d_inode;
2329 struct nfs4_readdir_arg args = {
2330 .fh = NFS_FH(dir),
2331 .pages = &page,
2332 .pgbase = 0,
2333 .count = count,
a65318bf 2334 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
1da177e4
LT		 2335 };
2336 struct nfs4_readdir_res res;
2337 struct rpc_message msg = {
2338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2339 .rpc_argp = &args,
2340 .rpc_resp = &res,
2341 .rpc_cred = cred,
2342 };
2343 int status;
2344
3110ff80 2345 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2346 dentry->d_parent->d_name.name,
2347 dentry->d_name.name,
2348 (unsigned long long)cookie);
1da177e4
LT		 2349 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2350 res.pgbase = args.pgbase;
2351 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2352 if (status == 0)
2353 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2354
2355 nfs_invalidate_atime(dir);
2356
3110ff80 2357 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2358 return status;
2359}
2360
2361static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2362 u64 cookie, struct page *page, unsigned int count, int plus)
2363{
2364 struct nfs4_exception exception = { };
2365 int err;
2366 do {
2367 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2368 _nfs4_proc_readdir(dentry, cred, cookie,
2369 page, count, plus),
2370 &exception);
2371 } while (exception.retry);
2372 return err;
2373}
2374
2375static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2376 struct iattr *sattr, dev_t rdev)
2377{
57dc9a57
TM		 2378 struct nfs4_createdata *data;
2379 int mode = sattr->ia_mode;
2380 int status = -ENOMEM;
1da177e4
LT		 2381
2382 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2383 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2384
2385 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2386 if (data == NULL)
2387 goto out;
2388
1da177e4 2389 if (S_ISFIFO(mode))
57dc9a57 2390 data->arg.ftype = NF4FIFO;
1da177e4 2391 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2392 data->arg.ftype = NF4BLK;
2393 data->arg.u.device.specdata1 = MAJOR(rdev);
2394 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2395 }
2396 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2397 data->arg.ftype = NF4CHR;
2398 data->arg.u.device.specdata1 = MAJOR(rdev);
2399 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2400 }
1da177e4 2401
57dc9a57
TM		 2402 status = nfs4_do_create(dir, dentry, data);
2403
2404 nfs4_free_createdata(data);
2405out:
1da177e4
LT		 2406 return status;
2407}
2408
2409static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2410 struct iattr *sattr, dev_t rdev)
2411{
2412 struct nfs4_exception exception = { };
2413 int err;
2414 do {
2415 err = nfs4_handle_exception(NFS_SERVER(dir),
2416 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2417 &exception);
2418 } while (exception.retry);
2419 return err;
2420}
2421
2422static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2423 struct nfs_fsstat *fsstat)
2424{
2425 struct nfs4_statfs_arg args = {
2426 .fh = fhandle,
2427 .bitmask = server->attr_bitmask,
2428 };
24ad148a
BH		 2429 struct nfs4_statfs_res res = {
2430 .fsstat = fsstat,
2431 };
1da177e4
LT		 2432 struct rpc_message msg = {
2433 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2434 .rpc_argp = &args,
24ad148a 2435 .rpc_resp = &res,
1da177e4
LT		 2436 };
2437
0e574af1 2438 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2439 return rpc_call_sync(server->client, &msg, 0);
2440}
2441
2442static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2443{
2444 struct nfs4_exception exception = { };
2445 int err;
2446 do {
2447 err = nfs4_handle_exception(server,
2448 _nfs4_proc_statfs(server, fhandle, fsstat),
2449 &exception);
2450 } while (exception.retry);
2451 return err;
2452}
2453
2454static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2455 struct nfs_fsinfo *fsinfo)
2456{
2457 struct nfs4_fsinfo_arg args = {
2458 .fh = fhandle,
2459 .bitmask = server->attr_bitmask,
2460 };
3dda5e43
BH		 2461 struct nfs4_fsinfo_res res = {
2462 .fsinfo = fsinfo,
2463 };
1da177e4
LT		 2464 struct rpc_message msg = {
2465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2466 .rpc_argp = &args,
3dda5e43 2467 .rpc_resp = &res,
1da177e4
LT		 2468 };
2469
2470 return rpc_call_sync(server->client, &msg, 0);
2471}
2472
2473static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2474{
2475 struct nfs4_exception exception = { };
2476 int err;
2477
2478 do {
2479 err = nfs4_handle_exception(server,
2480 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2481 &exception);
2482 } while (exception.retry);
2483 return err;
2484}
2485
2486static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2487{
0e574af1 2488 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2489 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2490}
2491
2492static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2493 struct nfs_pathconf *pathconf)
2494{
2495 struct nfs4_pathconf_arg args = {
2496 .fh = fhandle,
2497 .bitmask = server->attr_bitmask,
2498 };
d45b2989
BH		 2499 struct nfs4_pathconf_res res = {
2500 .pathconf = pathconf,
2501 };
1da177e4
LT		 2502 struct rpc_message msg = {
2503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2504 .rpc_argp = &args,
d45b2989 2505 .rpc_resp = &res,
1da177e4
LT		 2506 };
2507
2508 /* None of the pathconf attributes are mandatory to implement */
2509 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2510 memset(pathconf, 0, sizeof(*pathconf));
2511 return 0;
2512 }
2513
0e574af1 2514 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2515 return rpc_call_sync(server->client, &msg, 0);
2516}
2517
2518static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2519 struct nfs_pathconf *pathconf)
2520{
2521 struct nfs4_exception exception = { };
2522 int err;
2523
2524 do {
2525 err = nfs4_handle_exception(server,
2526 _nfs4_proc_pathconf(server, fhandle, pathconf),
2527 &exception);
2528 } while (exception.retry);
2529 return err;
2530}
2531
ec06c096 2532static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2533{
ec06c096 2534 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2535
9e33bed5 2536 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
1da177e4 2537 rpc_restart_call(task);
ec06c096 2538 return -EAGAIN;
1da177e4 2539 }
8850df99
TM		 2540
2541 nfs_invalidate_atime(data->inode);
1da177e4 2542 if (task->tk_status > 0)
ec06c096
TM		 2543 renew_lease(server, data->timestamp);
2544 return 0;
1da177e4
LT		 2545}
2546
bdc7f021 2547static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2548{
1da177e4 2549 data->timestamp = jiffies;
bdc7f021 2550 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2551}
2552
788e7a89 2553static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2554{
1da177e4
LT		 2555 struct inode *inode = data->inode;
2556
9e33bed5 2557 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
1da177e4 2558 rpc_restart_call(task);
788e7a89 2559 return -EAGAIN;
1da177e4 2560 }
4f9838c7 2561 if (task->tk_status >= 0) {
1da177e4 2562 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2563 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2564 }
788e7a89 2565 return 0;
1da177e4
LT		 2566}
2567
bdc7f021 2568static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2569{
bdc7f021
TM		 2570 struct nfs_server *server = NFS_SERVER(data->inode);
2571
a65318bf 2572 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2573 data->res.server = server;
1da177e4
LT		 2574 data->timestamp = jiffies;
2575
bdc7f021 2576 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2577}
2578
788e7a89 2579static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2580{
1da177e4
LT		 2581 struct inode *inode = data->inode;
2582
9e33bed5 2583 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
1da177e4 2584 rpc_restart_call(task);
788e7a89 2585 return -EAGAIN;
1da177e4 2586 }
9e08a3c5 2587 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2588 return 0;
1da177e4
LT		 2589}
2590
bdc7f021 2591static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2592{
788e7a89 2593 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2594
a65318bf 2595 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2596 data->res.server = server;
bdc7f021 2597 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2598}
2599
2600/*
2601 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2602 * standalone procedure for queueing an asynchronous RENEW.
2603 */
963d8fe5 2604static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2605{
adfa6f98 2606 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2607 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2608
2609 if (task->tk_status < 0) {
95baa25c
TM		 2610 /* Unless we're shutting down, schedule state recovery! */
2611 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
2612 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2613 return;
2614 }
2615 spin_lock(&clp->cl_lock);
2616 if (time_before(clp->cl_last_renewal,timestamp))
2617 clp->cl_last_renewal = timestamp;
2618 spin_unlock(&clp->cl_lock);
2619}
2620
963d8fe5
TM		 2621static const struct rpc_call_ops nfs4_renew_ops = {
2622 .rpc_call_done = nfs4_renew_done,
2623};
2624
adfa6f98 2625int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2626{
2627 struct rpc_message msg = {
2628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2629 .rpc_argp = clp,
b4454fe1 2630 .rpc_cred = cred,
1da177e4
LT		 2631 };
2632
2633 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2634 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2635}
2636
adfa6f98 2637int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2638{
2639 struct rpc_message msg = {
2640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2641 .rpc_argp = clp,
b4454fe1 2642 .rpc_cred = cred,
1da177e4
LT		 2643 };
2644 unsigned long now = jiffies;
2645 int status;
2646
2647 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2648 if (status < 0)
2649 return status;
2650 spin_lock(&clp->cl_lock);
2651 if (time_before(clp->cl_last_renewal,now))
2652 clp->cl_last_renewal = now;
2653 spin_unlock(&clp->cl_lock);
2654 return 0;
2655}
2656
aa1870af
BF		 2657static inline int nfs4_server_supports_acls(struct nfs_server *server)
2658{
2659 return (server->caps & NFS_CAP_ACLS)
2660 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2661 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2662}
2663
2664/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2665 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2666 * the stack.
2667 */
2668#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2669
2670static void buf_to_pages(const void *buf, size_t buflen,
2671 struct page **pages, unsigned int *pgbase)
2672{
2673 const void *p = buf;
2674
2675 *pgbase = offset_in_page(buf);
2676 p -= *pgbase;
2677 while (p < buf + buflen) {
2678 *(pages++) = virt_to_page(p);
2679 p += PAGE_CACHE_SIZE;
2680 }
2681}
2682
e50a1c2e
BF		 2683struct nfs4_cached_acl {
2684 int cached;
2685 size_t len;
3e9d4154 2686 char data[0];
e50a1c2e
BF		 2687};
2688
2689static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2690{
2691 struct nfs_inode *nfsi = NFS_I(inode);
2692
2693 spin_lock(&inode->i_lock);
2694 kfree(nfsi->nfs4_acl);
2695 nfsi->nfs4_acl = acl;
2696 spin_unlock(&inode->i_lock);
2697}
2698
2699static void nfs4_zap_acl_attr(struct inode *inode)
2700{
2701 nfs4_set_cached_acl(inode, NULL);
2702}
2703
2704static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2705{
2706 struct nfs_inode *nfsi = NFS_I(inode);
2707 struct nfs4_cached_acl *acl;
2708 int ret = -ENOENT;
2709
2710 spin_lock(&inode->i_lock);
2711 acl = nfsi->nfs4_acl;
2712 if (acl == NULL)
2713 goto out;
2714 if (buf == NULL) /* user is just asking for length */
2715 goto out_len;
2716 if (acl->cached == 0)
2717 goto out;
2718 ret = -ERANGE; /* see getxattr(2) man page */
2719 if (acl->len > buflen)
2720 goto out;
2721 memcpy(buf, acl->data, acl->len);
2722out_len:
2723 ret = acl->len;
2724out:
2725 spin_unlock(&inode->i_lock);
2726 return ret;
2727}
2728
2729static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2730{
2731 struct nfs4_cached_acl *acl;
2732
2733 if (buf && acl_len <= PAGE_SIZE) {
2734 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2735 if (acl == NULL)
2736 goto out;
2737 acl->cached = 1;
2738 memcpy(acl->data, buf, acl_len);
2739 } else {
2740 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2741 if (acl == NULL)
2742 goto out;
2743 acl->cached = 0;
2744 }
2745 acl->len = acl_len;
2746out:
2747 nfs4_set_cached_acl(inode, acl);
2748}
2749
16b4289c 2750static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2751{
aa1870af
BF		 2752 struct page *pages[NFS4ACL_MAXPAGES];
2753 struct nfs_getaclargs args = {
2754 .fh = NFS_FH(inode),
2755 .acl_pages = pages,
2756 .acl_len = buflen,
2757 };
663c79b3
BH		 2758 struct nfs_getaclres res = {
2759 .acl_len = buflen,
2760 };
e50a1c2e 2761 void *resp_buf;
aa1870af
BF		 2762 struct rpc_message msg = {
2763 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2764 .rpc_argp = &args,
663c79b3 2765 .rpc_resp = &res,
aa1870af 2766 };
e50a1c2e 2767 struct page *localpage = NULL;
aa1870af
BF		 2768 int ret;
2769
e50a1c2e
BF		 2770 if (buflen < PAGE_SIZE) {
2771 /* As long as we're doing a round trip to the server anyway,
2772 * let's be prepared for a page of acl data. */
2773 localpage = alloc_page(GFP_KERNEL);
2774 resp_buf = page_address(localpage);
2775 if (localpage == NULL)
2776 return -ENOMEM;
2777 args.acl_pages[0] = localpage;
2778 args.acl_pgbase = 0;
663c79b3 2779 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2780 } else {
2781 resp_buf = buf;
2782 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2783 }
aa1870af 2784 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2785 if (ret)
2786 goto out_free;
663c79b3
BH		 2787 if (res.acl_len > args.acl_len)
2788 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 2789 else
663c79b3 2790 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 2791 if (buf) {
2792 ret = -ERANGE;
663c79b3 2793 if (res.acl_len > buflen)
e50a1c2e
BF		 2794 goto out_free;
2795 if (localpage)
663c79b3 2796 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 2797 }
663c79b3 2798 ret = res.acl_len;
e50a1c2e
BF		 2799out_free:
2800 if (localpage)
2801 __free_page(localpage);
aa1870af
BF		 2802 return ret;
2803}
2804
16b4289c
TM		 2805static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2806{
2807 struct nfs4_exception exception = { };
2808 ssize_t ret;
2809 do {
2810 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2811 if (ret >= 0)
2812 break;
2813 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2814 } while (exception.retry);
2815 return ret;
2816}
2817
e50a1c2e
BF		 2818static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2819{
2820 struct nfs_server *server = NFS_SERVER(inode);
2821 int ret;
2822
2823 if (!nfs4_server_supports_acls(server))
2824 return -EOPNOTSUPP;
2825 ret = nfs_revalidate_inode(server, inode);
2826 if (ret < 0)
2827 return ret;
f41f7418
TM		 2828 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2829 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 2830 ret = nfs4_read_cached_acl(inode, buf, buflen);
2831 if (ret != -ENOENT)
2832 return ret;
2833 return nfs4_get_acl_uncached(inode, buf, buflen);
2834}
2835
16b4289c 2836static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2837{
2838 struct nfs_server *server = NFS_SERVER(inode);
2839 struct page *pages[NFS4ACL_MAXPAGES];
2840 struct nfs_setaclargs arg = {
2841 .fh = NFS_FH(inode),
2842 .acl_pages = pages,
2843 .acl_len = buflen,
2844 };
73c403a9 2845 struct nfs_setaclres res;
4b580ee3
BF		 2846 struct rpc_message msg = {
2847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2848 .rpc_argp = &arg,
73c403a9 2849 .rpc_resp = &res,
4b580ee3
BF		 2850 };
2851 int ret;
2852
2853 if (!nfs4_server_supports_acls(server))
2854 return -EOPNOTSUPP;
642ac549 2855 nfs_inode_return_delegation(inode);
4b580ee3 2856 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2857 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
f41f7418
TM		 2858 nfs_access_zap_cache(inode);
2859 nfs_zap_acl_cache(inode);
4b580ee3
BF		 2860 return ret;
2861}
2862
16b4289c
TM		 2863static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2864{
2865 struct nfs4_exception exception = { };
2866 int err;
2867 do {
2868 err = nfs4_handle_exception(NFS_SERVER(inode),
2869 __nfs4_proc_set_acl(inode, buf, buflen),
2870 &exception);
2871 } while (exception.retry);
2872 return err;
2873}
2874
1da177e4 2875static int
9e33bed5 2876nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 2877{
7539bbab 2878 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2879
2880 if (!clp || task->tk_status >= 0)
2881 return 0;
2882 switch(task->tk_status) {
9e33bed5
TM		 2883 case -NFS4ERR_ADMIN_REVOKED:
2884 case -NFS4ERR_BAD_STATEID:
2885 case -NFS4ERR_OPENMODE:
2886 if (state == NULL)
2887 break;
2888 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 2889 case -NFS4ERR_STALE_CLIENTID:
2890 case -NFS4ERR_STALE_STATEID:
2891 case -NFS4ERR_EXPIRED:
5d00837b 2892 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 2893 nfs4_schedule_state_recovery(clp);
e005e804 2894 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 2895 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 2896 task->tk_status = 0;
2897 return -EAGAIN;
1da177e4 2898 case -NFS4ERR_DELAY:
2e96d286 2899 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 2900 case -NFS4ERR_GRACE:
1da177e4
LT		 2901 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2902 task->tk_status = 0;
2903 return -EAGAIN;
2904 case -NFS4ERR_OLD_STATEID:
2905 task->tk_status = 0;
2906 return -EAGAIN;
2907 }
2908 task->tk_status = nfs4_map_errors(task->tk_status);
2909 return 0;
2910}
2911
adfa6f98 2912int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2913{
2914 nfs4_verifier sc_verifier;
2915 struct nfs4_setclientid setclientid = {
2916 .sc_verifier = &sc_verifier,
2917 .sc_prog = program,
2918 };
2919 struct rpc_message msg = {
2920 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2921 .rpc_argp = &setclientid,
2922 .rpc_resp = clp,
286d7d6a 2923 .rpc_cred = cred,
1da177e4 2924 };
bc4785cd 2925 __be32 *p;
1da177e4
LT		 2926 int loop = 0;
2927 int status;
2928
bc4785cd 2929 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2930 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2931 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2932
2933 for(;;) {
2934 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 2935 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 2936 clp->cl_ipaddr,
2937 rpc_peeraddr2str(clp->cl_rpcclient,
2938 RPC_DISPLAY_ADDR),
69dd716c
TM		 2939 rpc_peeraddr2str(clp->cl_rpcclient,
2940 RPC_DISPLAY_PROTO),
78ea323b 2941 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 2942 clp->cl_id_uniquifier);
2943 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 2944 sizeof(setclientid.sc_netid),
2945 rpc_peeraddr2str(clp->cl_rpcclient,
2946 RPC_DISPLAY_NETID));
1da177e4 2947 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 2948 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 2949 clp->cl_ipaddr, port >> 8, port & 255);
2950
2951 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2952 if (status != -NFS4ERR_CLID_INUSE)
2953 break;
2954 if (signalled())
2955 break;
2956 if (loop++ & 1)
2957 ssleep(clp->cl_lease_time + 1);
2958 else
2959 if (++clp->cl_id_uniquifier == 0)
2960 break;
2961 }
2962 return status;
2963}
2964
adfa6f98 2965static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2966{
2967 struct nfs_fsinfo fsinfo;
2968 struct rpc_message msg = {
2969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2970 .rpc_argp = clp,
2971 .rpc_resp = &fsinfo,
286d7d6a 2972 .rpc_cred = cred,
1da177e4
LT		 2973 };
2974 unsigned long now;
2975 int status;
2976
2977 now = jiffies;
2978 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2979 if (status == 0) {
2980 spin_lock(&clp->cl_lock);
2981 clp->cl_lease_time = fsinfo.lease_time * HZ;
2982 clp->cl_last_renewal = now;
2983 spin_unlock(&clp->cl_lock);
2984 }
2985 return status;
2986}
2987
adfa6f98 2988int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 2989{
77e03677 2990 long timeout = 0;
51581f3b
TM		 2991 int err;
2992 do {
2993 err = _nfs4_proc_setclientid_confirm(clp, cred);
2994 switch (err) {
2995 case 0:
2996 return err;
2997 case -NFS4ERR_RESOURCE:
2998 /* The IBM lawyers misread another document! */
2999 case -NFS4ERR_DELAY:
3000 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3001 }
3002 } while (err == 0);
3003 return err;
3004}
3005
fe650407
TM		 3006struct nfs4_delegreturndata {
3007 struct nfs4_delegreturnargs args;
fa178f29 3008 struct nfs4_delegreturnres res;
fe650407
TM		 3009 struct nfs_fh fh;
3010 nfs4_stateid stateid;
26e976a8 3011 unsigned long timestamp;
fa178f29 3012 struct nfs_fattr fattr;
fe650407
TM		 3013 int rpc_status;
3014};
3015
fe650407
TM		 3016static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3017{
3018 struct nfs4_delegreturndata *data = calldata;
3019 data->rpc_status = task->tk_status;
26e976a8 3020 if (data->rpc_status == 0)
fa178f29 3021 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3022}
3023
3024static void nfs4_delegreturn_release(void *calldata)
3025{
fe650407
TM		 3026 kfree(calldata);
3027}
3028
c8d149f3 3029static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3030 .rpc_call_done = nfs4_delegreturn_done,
3031 .rpc_release = nfs4_delegreturn_release,
3032};
3033
e6f81075 3034static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3035{
3036 struct nfs4_delegreturndata *data;
fa178f29 3037 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3038 struct rpc_task *task;
5138fde0
TM		 3039 struct rpc_message msg = {
3040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3041 .rpc_cred = cred,
3042 };
c970aa85
TM		 3043 struct rpc_task_setup task_setup_data = {
3044 .rpc_client = server->client,
5138fde0 3045 .rpc_message = &msg,
c970aa85
TM		 3046 .callback_ops = &nfs4_delegreturn_ops,
3047 .flags = RPC_TASK_ASYNC,
3048 };
e6f81075 3049 int status = 0;
fe650407
TM		 3050
3051 data = kmalloc(sizeof(*data), GFP_KERNEL);
3052 if (data == NULL)
3053 return -ENOMEM;
3054 data->args.fhandle = &data->fh;
3055 data->args.stateid = &data->stateid;
fa178f29 3056 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3057 nfs_copy_fh(&data->fh, NFS_FH(inode));
3058 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3059 data->res.fattr = &data->fattr;
3060 data->res.server = server;
5138fde0 3061 nfs_fattr_init(data->res.fattr);
26e976a8 3062 data->timestamp = jiffies;
fe650407
TM		 3063 data->rpc_status = 0;
3064
c970aa85 3065 task_setup_data.callback_data = data;
5138fde0
TM		 3066 msg.rpc_argp = &data->args,
3067 msg.rpc_resp = &data->res,
c970aa85 3068 task = rpc_run_task(&task_setup_data);
7a1218a2 3069 if (IS_ERR(task))
fe650407 3070 return PTR_ERR(task);
e6f81075
TM		 3071 if (!issync)
3072 goto out;
fe650407 3073 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3074 if (status != 0)
3075 goto out;
3076 status = data->rpc_status;
3077 if (status != 0)
3078 goto out;
3079 nfs_refresh_inode(inode, &data->fattr);
3080out:
e6b3c4db 3081 rpc_put_task(task);
fe650407 3082 return status;
1da177e4
LT		 3083}
3084
e6f81075 3085int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3086{
3087 struct nfs_server *server = NFS_SERVER(inode);
3088 struct nfs4_exception exception = { };
3089 int err;
3090 do {
e6f81075 3091 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3092 switch (err) {
3093 case -NFS4ERR_STALE_STATEID:
3094 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3095 case 0:
3096 return 0;
3097 }
3098 err = nfs4_handle_exception(server, err, &exception);
3099 } while (exception.retry);
3100 return err;
3101}
3102
3103#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3104#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3105
3106/*
3107 * sleep, with exponential backoff, and retry the LOCK operation.
3108 */
3109static unsigned long
3110nfs4_set_lock_task_retry(unsigned long timeout)
3111{
150030b7 3112 schedule_timeout_killable(timeout);
1da177e4
LT		 3113 timeout <<= 1;
3114 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3115 return NFS4_LOCK_MAXTIMEOUT;
3116 return timeout;
3117}
3118
1da177e4
LT		 3119static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3120{
3121 struct inode *inode = state->inode;
3122 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3123 struct nfs_client *clp = server->nfs_client;
911d1aaf 3124 struct nfs_lockt_args arg = {
1da177e4 3125 .fh = NFS_FH(inode),
911d1aaf 3126 .fl = request,
1da177e4 3127 };
911d1aaf
TM		 3128 struct nfs_lockt_res res = {
3129 .denied = request,
1da177e4
LT		 3130 };
3131 struct rpc_message msg = {
3132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3133 .rpc_argp = &arg,
3134 .rpc_resp = &res,
3135 .rpc_cred = state->owner->so_cred,
3136 };
1da177e4
LT		 3137 struct nfs4_lock_state *lsp;
3138 int status;
3139
911d1aaf 3140 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3141 status = nfs4_set_lock_state(state, request);
3142 if (status != 0)
3143 goto out;
3144 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3145 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3146 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3147 switch (status) {
3148 case 0:
3149 request->fl_type = F_UNLCK;
3150 break;
3151 case -NFS4ERR_DENIED:
3152 status = 0;
1da177e4 3153 }
70cc6487 3154 request->fl_ops->fl_release_private(request);
8d0a8a9d 3155out:
1da177e4
LT		 3156 return status;
3157}
3158
3159static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3160{
3161 struct nfs4_exception exception = { };
3162 int err;
3163
3164 do {
3165 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3166 _nfs4_proc_getlk(state, cmd, request),
3167 &exception);
3168 } while (exception.retry);
3169 return err;
3170}
3171
3172static int do_vfs_lock(struct file *file, struct file_lock *fl)
3173{
3174 int res = 0;
3175 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3176 case FL_POSIX:
3177 res = posix_lock_file_wait(file, fl);
3178 break;
3179 case FL_FLOCK:
3180 res = flock_lock_file_wait(file, fl);
3181 break;
3182 default:
3183 BUG();
3184 }
1da177e4
LT		 3185 return res;
3186}
3187
faf5f49c 3188struct nfs4_unlockdata {
911d1aaf
TM		 3189 struct nfs_locku_args arg;
3190 struct nfs_locku_res res;
faf5f49c
TM		 3191 struct nfs4_lock_state *lsp;
3192 struct nfs_open_context *ctx;
911d1aaf
TM		 3193 struct file_lock fl;
3194 const struct nfs_server *server;
26e976a8 3195 unsigned long timestamp;
faf5f49c
TM		 3196};
3197
911d1aaf
TM		 3198static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3199 struct nfs_open_context *ctx,
3200 struct nfs4_lock_state *lsp,
3201 struct nfs_seqid *seqid)
3202{
3203 struct nfs4_unlockdata *p;
3204 struct inode *inode = lsp->ls_state->inode;
3205
3206 p = kmalloc(sizeof(*p), GFP_KERNEL);
3207 if (p == NULL)
3208 return NULL;
3209 p->arg.fh = NFS_FH(inode);
3210 p->arg.fl = &p->fl;
3211 p->arg.seqid = seqid;
c1d51931 3212 p->res.seqid = seqid;
911d1aaf
TM		 3213 p->arg.stateid = &lsp->ls_stateid;
3214 p->lsp = lsp;
3215 atomic_inc(&lsp->ls_count);
3216 /* Ensure we don't close file until we're done freeing locks! */
3217 p->ctx = get_nfs_open_context(ctx);
3218 memcpy(&p->fl, fl, sizeof(p->fl));
3219 p->server = NFS_SERVER(inode);
3220 return p;
3221}
3222
06f814a3 3223static void nfs4_locku_release_calldata(void *data)
faf5f49c 3224{
963d8fe5 3225 struct nfs4_unlockdata *calldata = data;
911d1aaf 3226 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3227 nfs4_put_lock_state(calldata->lsp);
3228 put_nfs_open_context(calldata->ctx);
3229 kfree(calldata);
faf5f49c
TM		 3230}
3231
963d8fe5 3232static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3233{
963d8fe5 3234 struct nfs4_unlockdata *calldata = data;
faf5f49c 3235
06f814a3
TM		 3236 if (RPC_ASSASSINATED(task))
3237 return;
faf5f49c
TM		 3238 switch (task->tk_status) {
3239 case 0:
3240 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3241 calldata->res.stateid.data,
faf5f49c 3242 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3243 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3244 break;
9e33bed5
TM		 3245 case -NFS4ERR_BAD_STATEID:
3246 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3247 case -NFS4ERR_STALE_STATEID:
3248 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3249 break;
3250 default:
9e33bed5 3251 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
faf5f49c 3252 rpc_restart_call(task);
faf5f49c 3253 }
faf5f49c
TM		 3254}
3255
4ce70ada 3256static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3257{
4ce70ada 3258 struct nfs4_unlockdata *calldata = data;
faf5f49c 3259
911d1aaf 3260 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3261 return;
3262 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3263 /* Note: exit _without_ running nfs4_locku_done */
3264 task->tk_action = NULL;
faf5f49c
TM		 3265 return;
3266 }
26e976a8 3267 calldata->timestamp = jiffies;
5138fde0 3268 rpc_call_start(task);
faf5f49c
TM		 3269}
3270
963d8fe5 3271static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3272 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3273 .rpc_call_done = nfs4_locku_done,
06f814a3 3274 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3275};
3276
a5d16a4d
TM		 3277static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3278 struct nfs_open_context *ctx,
3279 struct nfs4_lock_state *lsp,
3280 struct nfs_seqid *seqid)
3281{
3282 struct nfs4_unlockdata *data;
5138fde0
TM		 3283 struct rpc_message msg = {
3284 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3285 .rpc_cred = ctx->cred,
3286 };
c970aa85
TM		 3287 struct rpc_task_setup task_setup_data = {
3288 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3289 .rpc_message = &msg,
c970aa85 3290 .callback_ops = &nfs4_locku_ops,
101070ca 3291 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3292 .flags = RPC_TASK_ASYNC,
3293 };
a5d16a4d 3294
137d6aca
FF		 3295 /* Ensure this is an unlock - when canceling a lock, the
3296 * canceled lock is passed in, and it won't be an unlock.
3297 */
3298 fl->fl_type = F_UNLCK;
3299
a5d16a4d
TM		 3300 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3301 if (data == NULL) {
3302 nfs_free_seqid(seqid);
3303 return ERR_PTR(-ENOMEM);
3304 }
3305
5138fde0
TM		 3306 msg.rpc_argp = &data->arg,
3307 msg.rpc_resp = &data->res,
c970aa85
TM		 3308 task_setup_data.callback_data = data;
3309 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3310}
3311
faf5f49c
TM		 3312static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3313{
19e03c57 3314 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3315 struct nfs_seqid *seqid;
1da177e4 3316 struct nfs4_lock_state *lsp;
06f814a3
TM		 3317 struct rpc_task *task;
3318 int status = 0;
536ff0f8 3319 unsigned char fl_flags = request->fl_flags;
faf5f49c 3320
8d0a8a9d 3321 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3322 /* Unlock _before_ we do the RPC call */
3323 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3324 down_read(&nfsi->rwsem);
3325 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3326 up_read(&nfsi->rwsem);
9b073574 3327 goto out;
19e03c57
TM		 3328 }
3329 up_read(&nfsi->rwsem);
8d0a8a9d 3330 if (status != 0)
9b073574
TM		 3331 goto out;
3332 /* Is this a delegated lock? */
3333 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3334 goto out;
8d0a8a9d 3335 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3336 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3337 status = -ENOMEM;
911d1aaf 3338 if (seqid == NULL)
9b073574 3339 goto out;
cd3758e3 3340 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3341 status = PTR_ERR(task);
3342 if (IS_ERR(task))
9b073574 3343 goto out;
a5d16a4d 3344 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3345 rpc_put_task(task);
9b073574 3346out:
536ff0f8 3347 request->fl_flags = fl_flags;
1da177e4
LT		 3348 return status;
3349}
3350
a5d16a4d
TM		 3351struct nfs4_lockdata {
3352 struct nfs_lock_args arg;
3353 struct nfs_lock_res res;
3354 struct nfs4_lock_state *lsp;
3355 struct nfs_open_context *ctx;
3356 struct file_lock fl;
26e976a8 3357 unsigned long timestamp;
a5d16a4d
TM		 3358 int rpc_status;
3359 int cancelled;
3360};
3361
3362static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3363 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3364{
a5d16a4d
TM		 3365 struct nfs4_lockdata *p;
3366 struct inode *inode = lsp->ls_state->inode;
1da177e4 3367 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3368
3369 p = kzalloc(sizeof(*p), GFP_KERNEL);
3370 if (p == NULL)
3371 return NULL;
3372
3373 p->arg.fh = NFS_FH(inode);
3374 p->arg.fl = &p->fl;
2f74c0a0
TM		 3375 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3376 if (p->arg.open_seqid == NULL)
3377 goto out_free;
a5d16a4d
TM		 3378 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3379 if (p->arg.lock_seqid == NULL)
2f74c0a0 3380 goto out_free_seqid;
a5d16a4d 3381 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3382 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3383 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3384 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d
TM		 3385 p->lsp = lsp;
3386 atomic_inc(&lsp->ls_count);
3387 p->ctx = get_nfs_open_context(ctx);
3388 memcpy(&p->fl, fl, sizeof(p->fl));
3389 return p;
2f74c0a0
TM		 3390out_free_seqid:
3391 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3392out_free:
3393 kfree(p);
3394 return NULL;
3395}
3396
3397static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3398{
3399 struct nfs4_lockdata *data = calldata;
3400 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3401
3110ff80 3402 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3403 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3404 return;
a5d16a4d
TM		 3405 /* Do we need to do an open_to_lock_owner? */
3406 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3407 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3408 return;
a5d16a4d
TM		 3409 data->arg.open_stateid = &state->stateid;
3410 data->arg.new_lock_owner = 1;
c1d51931 3411 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3412 } else
3413 data->arg.new_lock_owner = 0;
26e976a8 3414 data->timestamp = jiffies;
5138fde0 3415 rpc_call_start(task);
3110ff80 3416 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3417}
3418
3419static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3420{
3421 struct nfs4_lockdata *data = calldata;
3422
3110ff80 3423 dprintk("%s: begin!\n", __func__);
a5d16a4d
TM		 3424
3425 data->rpc_status = task->tk_status;
3426 if (RPC_ASSASSINATED(task))
3427 goto out;
3428 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3429 if (data->rpc_status == 0)
3430 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3431 else
3432 goto out;
3433 }
3434 if (data->rpc_status == 0) {
3435 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3436 sizeof(data->lsp->ls_stateid.data));
3437 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3438 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3439 }
a5d16a4d 3440out:
3110ff80 3441 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3442}
3443
3444static void nfs4_lock_release(void *calldata)
3445{
3446 struct nfs4_lockdata *data = calldata;
3447
3110ff80 3448 dprintk("%s: begin!\n", __func__);
2f74c0a0 3449 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3450 if (data->cancelled != 0) {
3451 struct rpc_task *task;
3452 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3453 data->arg.lock_seqid);
3454 if (!IS_ERR(task))
e6b3c4db 3455 rpc_put_task(task);
3110ff80 3456 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3457 } else
3458 nfs_free_seqid(data->arg.lock_seqid);
3459 nfs4_put_lock_state(data->lsp);
3460 put_nfs_open_context(data->ctx);
3461 kfree(data);
3110ff80 3462 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3463}
3464
3465static const struct rpc_call_ops nfs4_lock_ops = {
3466 .rpc_call_prepare = nfs4_lock_prepare,
3467 .rpc_call_done = nfs4_lock_done,
3468 .rpc_release = nfs4_lock_release,
3469};
3470
3471static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3472{
3473 struct nfs4_lockdata *data;
3474 struct rpc_task *task;
5138fde0
TM		 3475 struct rpc_message msg = {
3476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3477 .rpc_cred = state->owner->so_cred,
3478 };
c970aa85
TM		 3479 struct rpc_task_setup task_setup_data = {
3480 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3481 .rpc_message = &msg,
c970aa85 3482 .callback_ops = &nfs4_lock_ops,
101070ca 3483 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3484 .flags = RPC_TASK_ASYNC,
3485 };
a5d16a4d
TM		 3486 int ret;
3487
3110ff80 3488 dprintk("%s: begin!\n", __func__);
cd3758e3 3489 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3490 fl->fl_u.nfs4_fl.owner);
3491 if (data == NULL)
3492 return -ENOMEM;
3493 if (IS_SETLKW(cmd))
3494 data->arg.block = 1;
3495 if (reclaim != 0)
3496 data->arg.reclaim = 1;
5138fde0
TM		 3497 msg.rpc_argp = &data->arg,
3498 msg.rpc_resp = &data->res,
c970aa85
TM		 3499 task_setup_data.callback_data = data;
3500 task = rpc_run_task(&task_setup_data);
7a1218a2 3501 if (IS_ERR(task))
a5d16a4d 3502 return PTR_ERR(task);
a5d16a4d
TM		 3503 ret = nfs4_wait_for_completion_rpc_task(task);
3504 if (ret == 0) {
3505 ret = data->rpc_status;
3506 if (ret == -NFS4ERR_DENIED)
3507 ret = -EAGAIN;
3508 } else
3509 data->cancelled = 1;
e6b3c4db 3510 rpc_put_task(task);
3110ff80 3511 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3512 return ret;
1da177e4
LT		 3513}
3514
3515static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3516{
202b50dc
TM		 3517 struct nfs_server *server = NFS_SERVER(state->inode);
3518 struct nfs4_exception exception = { };
3519 int err;
3520
3521 do {
42a2d13e
TM		 3522 /* Cache the lock if possible... */
3523 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3524 return 0;
202b50dc
TM		 3525 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3526 if (err != -NFS4ERR_DELAY)
3527 break;
3528 nfs4_handle_exception(server, err, &exception);
3529 } while (exception.retry);
3530 return err;
1da177e4
LT		 3531}
3532
3533static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3534{
202b50dc
TM		 3535 struct nfs_server *server = NFS_SERVER(state->inode);
3536 struct nfs4_exception exception = { };
3537 int err;
3538
6bfc93ef
TM		 3539 err = nfs4_set_lock_state(state, request);
3540 if (err != 0)
3541 return err;
202b50dc 3542 do {
42a2d13e
TM		 3543 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3544 return 0;
202b50dc
TM		 3545 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3546 if (err != -NFS4ERR_DELAY)
3547 break;
3548 nfs4_handle_exception(server, err, &exception);
3549 } while (exception.retry);
3550 return err;
1da177e4
LT		 3551}
3552
3553static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3554{
19e03c57 3555 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 3556 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3557 int status;
3558
6bfc93ef 3559 /* Is this a delegated open? */
6bfc93ef
TM		 3560 status = nfs4_set_lock_state(state, request);
3561 if (status != 0)
3562 goto out;
01c3b861
TM		 3563 request->fl_flags |= FL_ACCESS;
3564 status = do_vfs_lock(request->fl_file, request);
3565 if (status < 0)
3566 goto out;
19e03c57 3567 down_read(&nfsi->rwsem);
01c3b861 3568 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 3569 /* Yes: cache locks! */
01c3b861 3570 /* ...but avoid races with delegation recall... */
19e03c57
TM		 3571 request->fl_flags = fl_flags & ~FL_SLEEP;
3572 status = do_vfs_lock(request->fl_file, request);
3573 goto out_unlock;
01c3b861 3574 }
6bfc93ef
TM		 3575 status = _nfs4_do_setlk(state, cmd, request, 0);
3576 if (status != 0)
01c3b861 3577 goto out_unlock;
6bfc93ef 3578 /* Note: we always want to sleep here! */
01c3b861 3579 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 3580 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 3581 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 3582out_unlock:
19e03c57 3583 up_read(&nfsi->rwsem);
01c3b861
TM		 3584out:
3585 request->fl_flags = fl_flags;
1da177e4
LT		 3586 return status;
3587}
3588
3589static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3590{
3591 struct nfs4_exception exception = { };
3592 int err;
3593
3594 do {
3595 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3596 _nfs4_proc_setlk(state, cmd, request),
3597 &exception);
3598 } while (exception.retry);
3599 return err;
3600}
3601
3602static int
3603nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3604{
3605 struct nfs_open_context *ctx;
3606 struct nfs4_state *state;
3607 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3608 int status;
3609
3610 /* verify open state */
cd3758e3 3611 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3612 state = ctx->state;
3613
3614 if (request->fl_start < 0 || request->fl_end < 0)
3615 return -EINVAL;
3616
3617 if (IS_GETLK(cmd))
3618 return nfs4_proc_getlk(state, F_GETLK, request);
3619
3620 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3621 return -EINVAL;
3622
3623 if (request->fl_type == F_UNLCK)
3624 return nfs4_proc_unlck(state, cmd, request);
3625
3626 do {
3627 status = nfs4_proc_setlk(state, cmd, request);
3628 if ((status != -EAGAIN) || IS_SETLK(cmd))
3629 break;
3630 timeout = nfs4_set_lock_task_retry(timeout);
3631 status = -ERESTARTSYS;
3632 if (signalled())
3633 break;
3634 } while(status < 0);
1da177e4
LT		 3635 return status;
3636}
3637
888e694c
TM		 3638int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3639{
3640 struct nfs_server *server = NFS_SERVER(state->inode);
3641 struct nfs4_exception exception = { };
3642 int err;
3643
3644 err = nfs4_set_lock_state(state, fl);
3645 if (err != 0)
3646 goto out;
3647 do {
3648 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3649 if (err != -NFS4ERR_DELAY)
3650 break;
3651 err = nfs4_handle_exception(server, err, &exception);
3652 } while (exception.retry);
3653out:
3654 return err;
3655}
6b3b5496 3656
aa1870af
BF		 3657#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3658
6b3b5496
BF		 3659int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3660 size_t buflen, int flags)
3661{
4b580ee3
BF		 3662 struct inode *inode = dentry->d_inode;
3663
3664 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3665 return -EOPNOTSUPP;
3666
4b580ee3 3667 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3668}
3669
3670/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3671 * and that's what we'll do for e.g. user attributes that haven't been set.
3672 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3673 * attributes in kernel-managed attribute namespaces. */
3674ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3675 size_t buflen)
3676{
aa1870af
BF		 3677 struct inode *inode = dentry->d_inode;
3678
3679 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3680 return -EOPNOTSUPP;
3681
3682 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3683}
3684
3685ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3686{
aa1870af 3687 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3688
096455a2
BF		 3689 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3690 return 0;
6b3b5496
BF		 3691 if (buf && buflen < len)
3692 return -ERANGE;
3693 if (buf)
aa1870af
BF		 3694 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3695 return len;
6b3b5496
BF		 3696}
3697
69aaaae1
TM		 3698static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
3699{
3700 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
3701 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
3702 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
3703 return;
3704
3705 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3706 NFS_ATTR_FATTR_NLINK;
3707 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3708 fattr->nlink = 2;
3709}
3710
56659e99 3711int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3712 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3713{
3714 struct nfs_server *server = NFS_SERVER(dir);
3715 u32 bitmask[2] = {
361e624f
MN		 3716 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3717 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3718 };
3719 struct nfs4_fs_locations_arg args = {
3720 .dir_fh = NFS_FH(dir),
c228fd3a 3721 .name = name,
683b57b4
TM		 3722 .page = page,
3723 .bitmask = bitmask,
3724 };
22958463
BH		 3725 struct nfs4_fs_locations_res res = {
3726 .fs_locations = fs_locations,
3727 };
683b57b4
TM		 3728 struct rpc_message msg = {
3729 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3730 .rpc_argp = &args,
22958463 3731 .rpc_resp = &res,
683b57b4
TM		 3732 };
3733 int status;
3734
3110ff80 3735 dprintk("%s: start\n", __func__);
c228fd3a 3736 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3737 fs_locations->server = server;
830b8e33 3738 fs_locations->nlocations = 0;
683b57b4 3739 status = rpc_call_sync(server->client, &msg, 0);
69aaaae1 3740 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 3741 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 3742 return status;
3743}
3744
557134a3
AA		 3745#ifdef CONFIG_NFS_V4_1
3746/* Destroy the slot table */
3747static void nfs4_destroy_slot_table(struct nfs4_session *session)
3748{
3749 if (session->fc_slot_table.slots == NULL)
3750 return;
3751 kfree(session->fc_slot_table.slots);
3752 session->fc_slot_table.slots = NULL;
3753 return;
3754}
3755
3756struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
3757{
3758 struct nfs4_session *session;
3759 struct nfs4_slot_table *tbl;
3760
3761 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
3762 if (!session)
3763 return NULL;
3764 tbl = &session->fc_slot_table;
3765 spin_lock_init(&tbl->slot_tbl_lock);
3766 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table");
3767 session->clp = clp;
3768 return session;
3769}
3770
3771void nfs4_destroy_session(struct nfs4_session *session)
3772{
3773 nfs4_destroy_slot_table(session);
3774 kfree(session);
3775}
3776
3777#endif /* CONFIG_NFS_V4_1 */
3778
1da177e4 3779struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
7eff03ae 3780 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 3781 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 3782 .recover_open = nfs4_open_reclaim,
3783 .recover_lock = nfs4_lock_reclaim,
3784};
3785
b79a4a1b 3786struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
7eff03ae 3787 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 3788 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 3789 .recover_open = nfs4_open_expired,
3790 .recover_lock = nfs4_lock_expired,
3791};
3792
92e1d5be 3793static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3794 .permission = nfs_permission,
3795 .getattr = nfs_getattr,
3796 .setattr = nfs_setattr,
3797 .getxattr = nfs4_getxattr,
3798 .setxattr = nfs4_setxattr,
3799 .listxattr = nfs4_listxattr,
3800};
3801
509de811 3802const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3803 .version = 4, /* protocol version */
3804 .dentry_ops = &nfs4_dentry_operations,
3805 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3806 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3807 .getroot = nfs4_proc_get_root,
3808 .getattr = nfs4_proc_getattr,
3809 .setattr = nfs4_proc_setattr,
2b3de441 3810 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3811 .lookup = nfs4_proc_lookup,
3812 .access = nfs4_proc_access,
3813 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3814 .create = nfs4_proc_create,
3815 .remove = nfs4_proc_remove,
3816 .unlink_setup = nfs4_proc_unlink_setup,
3817 .unlink_done = nfs4_proc_unlink_done,
3818 .rename = nfs4_proc_rename,
3819 .link = nfs4_proc_link,
3820 .symlink = nfs4_proc_symlink,
3821 .mkdir = nfs4_proc_mkdir,
3822 .rmdir = nfs4_proc_remove,
3823 .readdir = nfs4_proc_readdir,
3824 .mknod = nfs4_proc_mknod,
3825 .statfs = nfs4_proc_statfs,
3826 .fsinfo = nfs4_proc_fsinfo,
3827 .pathconf = nfs4_proc_pathconf,
e9326dca 3828 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3829 .decode_dirent = nfs4_decode_dirent,
3830 .read_setup = nfs4_proc_read_setup,
ec06c096 3831 .read_done = nfs4_read_done,
1da177e4 3832 .write_setup = nfs4_proc_write_setup,
788e7a89 3833 .write_done = nfs4_write_done,
1da177e4 3834 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3835 .commit_done = nfs4_commit_done,
1da177e4 3836 .lock = nfs4_proc_lock,
e50a1c2e 3837 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 3838 .close_context = nfs4_close_context,
1da177e4
LT		 3839};
3840
3841/*
3842 * Local variables:
3843 * c-basic-offset: 8
3844 * End:
3845 */
Linux 6.x block layer and io_uring tree(s)