]> bbs.cooldavid.org Git - net-next-2.6.git/blame - fs/nfs/nfs4proc.c
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
nfs41: introduce nfs4_call_sync
[net-next-2.6.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
cccef3b9
AA		 274#if defined(CONFIG_NFS_V4_1)
275
276int _nfs4_call_sync_session(struct nfs_server *server,
277 struct rpc_message *msg,
278 struct nfs4_sequence_args *args,
279 struct nfs4_sequence_res *res,
280 int cache_reply)
281{
282 /* in preparation for setting up the sequence op */
283 return rpc_call_sync(server->client, msg, 0);
284}
285
286#endif /* CONFIG_NFS_V4_1 */
287
288int _nfs4_call_sync(struct nfs_server *server,
289 struct rpc_message *msg,
290 struct nfs4_sequence_args *args,
291 struct nfs4_sequence_res *res,
292 int cache_reply)
293{
294 return rpc_call_sync(server->client, msg, 0);
295}
296
297#define nfs4_call_sync(server, msg, args, res, cache_reply) \
298 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
299 &(res)->seq_res, (cache_reply))
300
38478b24 301static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 302{
38478b24 303 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 304
38478b24 305 spin_lock(&dir->i_lock);
40d24704
TM		 306 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
307 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 308 nfs_force_lookup_revalidate(dir);
40d24704 309 nfsi->change_attr = cinfo->after;
38478b24 310 spin_unlock(&dir->i_lock);
1da177e4
LT		 311}
312
e56e0b78 313struct nfs4_opendata {
c6d00e63 314 struct kref kref;
e56e0b78
TM		 315 struct nfs_openargs o_arg;
316 struct nfs_openres o_res;
cdd4e68b
TM		 317 struct nfs_open_confirmargs c_arg;
318 struct nfs_open_confirmres c_res;
e56e0b78
TM		 319 struct nfs_fattr f_attr;
320 struct nfs_fattr dir_attr;
ad389da7 321 struct path path;
e56e0b78
TM		 322 struct dentry *dir;
323 struct nfs4_state_owner *owner;
aac00a8d 324 struct nfs4_state *state;
e56e0b78 325 struct iattr attrs;
26e976a8 326 unsigned long timestamp;
3e309914 327 unsigned int rpc_done : 1;
24ac23ab
TM		 328 int rpc_status;
329 int cancelled;
e56e0b78
TM		 330};
331
2ced46c2
TM		 332
333static void nfs4_init_opendata_res(struct nfs4_opendata *p)
334{
335 p->o_res.f_attr = &p->f_attr;
336 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 337 p->o_res.seqid = p->o_arg.seqid;
338 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 339 p->o_res.server = p->o_arg.server;
340 nfs_fattr_init(&p->f_attr);
341 nfs_fattr_init(&p->dir_attr);
342}
343
ad389da7 344static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 345 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 346 const struct iattr *attrs)
347{
ad389da7 348 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 349 struct inode *dir = parent->d_inode;
350 struct nfs_server *server = NFS_SERVER(dir);
351 struct nfs4_opendata *p;
352
353 p = kzalloc(sizeof(*p), GFP_KERNEL);
354 if (p == NULL)
355 goto err;
356 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
357 if (p->o_arg.seqid == NULL)
358 goto err_free;
ad389da7
TM		 359 p->path.mnt = mntget(path->mnt);
360 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 361 p->dir = parent;
362 p->owner = sp;
363 atomic_inc(&sp->so_count);
364 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 365 p->o_arg.open_flags = flags;
366 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 367 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 368 p->o_arg.id = sp->so_owner_id.id;
ad389da7 369 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 370 p->o_arg.server = server;
371 p->o_arg.bitmask = server->attr_bitmask;
372 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 373 if (flags & O_EXCL) {
374 u32 *s = (u32 *) p->o_arg.u.verifier.data;
375 s[0] = jiffies;
376 s[1] = current->pid;
377 } else if (flags & O_CREAT) {
378 p->o_arg.u.attrs = &p->attrs;
379 memcpy(&p->attrs, attrs, sizeof(p->attrs));
380 }
cdd4e68b
TM		 381 p->c_arg.fh = &p->o_res.fh;
382 p->c_arg.stateid = &p->o_res.stateid;
383 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 384 nfs4_init_opendata_res(p);
c6d00e63 385 kref_init(&p->kref);
e56e0b78
TM		 386 return p;
387err_free:
388 kfree(p);
389err:
390 dput(parent);
391 return NULL;
392}
393
c6d00e63 394static void nfs4_opendata_free(struct kref *kref)
e56e0b78 395{
c6d00e63
TM		 396 struct nfs4_opendata *p = container_of(kref,
397 struct nfs4_opendata, kref);
398
399 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 400 if (p->state != NULL)
401 nfs4_put_open_state(p->state);
c6d00e63
TM		 402 nfs4_put_state_owner(p->owner);
403 dput(p->dir);
31f31db1 404 path_put(&p->path);
c6d00e63
TM		 405 kfree(p);
406}
407
408static void nfs4_opendata_put(struct nfs4_opendata *p)
409{
410 if (p != NULL)
411 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 412}
413
06f814a3
TM		 414static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
415{
06f814a3
TM		 416 int ret;
417
06f814a3 418 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 419 return ret;
420}
421
dc0b027d 422static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 423{
424 int ret = 0;
dc0b027d
TM		 425
426 if (open_mode & O_EXCL)
427 goto out;
428 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 429 case FMODE_READ:
430 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 431 break;
432 case FMODE_WRITE:
433 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 434 break;
435 case FMODE_READ|FMODE_WRITE:
436 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
437 }
dc0b027d 438out:
6ee41268
TM		 439 return ret;
440}
441
dc0b027d 442static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 443{
dc0b027d 444 if ((delegation->type & fmode) != fmode)
aac00a8d 445 return 0;
15c831bf 446 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 447 return 0;
b7391f44 448 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 449 return 1;
450}
451
dc0b027d 452static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 453{
dc0b027d 454 switch (fmode) {
e7616923
TM		 455 case FMODE_WRITE:
456 state->n_wronly++;
457 break;
458 case FMODE_READ:
459 state->n_rdonly++;
460 break;
461 case FMODE_READ|FMODE_WRITE:
462 state->n_rdwr++;
463 }
dc0b027d 464 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 465}
466
dc0b027d 467static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 468{
469 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
470 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
471 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 472 switch (fmode) {
003707c7
TM		 473 case FMODE_READ:
474 set_bit(NFS_O_RDONLY_STATE, &state->flags);
475 break;
476 case FMODE_WRITE:
477 set_bit(NFS_O_WRONLY_STATE, &state->flags);
478 break;
479 case FMODE_READ|FMODE_WRITE:
480 set_bit(NFS_O_RDWR_STATE, &state->flags);
481 }
e7616923
TM		 482}
483
dc0b027d 484static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 485{
8bda4e4c 486 write_seqlock(&state->seqlock);
dc0b027d 487 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 488 write_sequnlock(&state->seqlock);
003707c7
TM		 489}
490
dc0b027d 491static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 492{
8bda4e4c
TM		 493 /*
494 * Protect the call to nfs4_state_set_mode_locked and
495 * serialise the stateid update
496 */
497 write_seqlock(&state->seqlock);
003707c7
TM		 498 if (deleg_stateid != NULL) {
499 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
500 set_bit(NFS_DELEGATED_STATE, &state->flags);
501 }
502 if (open_stateid != NULL)
dc0b027d 503 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 504 write_sequnlock(&state->seqlock);
505 spin_lock(&state->owner->so_lock);
dc0b027d 506 update_open_stateflags(state, fmode);
ec073428 507 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 508}
509
dc0b027d 510static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 511{
512 struct nfs_inode *nfsi = NFS_I(state->inode);
513 struct nfs_delegation *deleg_cur;
514 int ret = 0;
515
dc0b027d 516 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 517
518 rcu_read_lock();
519 deleg_cur = rcu_dereference(nfsi->delegation);
520 if (deleg_cur == NULL)
521 goto no_delegation;
522
523 spin_lock(&deleg_cur->lock);
524 if (nfsi->delegation != deleg_cur ||
dc0b027d 525 (deleg_cur->type & fmode) != fmode)
34310430
TM		 526 goto no_delegation_unlock;
527
528 if (delegation == NULL)
529 delegation = &deleg_cur->stateid;
530 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
531 goto no_delegation_unlock;
532
b7391f44 533 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 534 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 535 ret = 1;
536no_delegation_unlock:
537 spin_unlock(&deleg_cur->lock);
538no_delegation:
539 rcu_read_unlock();
540
541 if (!ret && open_stateid != NULL) {
dc0b027d 542 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 543 ret = 1;
544 }
545
546 return ret;
547}
548
549
dc0b027d 550static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 551{
552 struct nfs_delegation *delegation;
553
554 rcu_read_lock();
555 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 556 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 557 rcu_read_unlock();
558 return;
559 }
560 rcu_read_unlock();
561 nfs_inode_return_delegation(inode);
562}
563
6ee41268 564static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 565{
566 struct nfs4_state *state = opendata->state;
567 struct nfs_inode *nfsi = NFS_I(state->inode);
568 struct nfs_delegation *delegation;
dc0b027d
TM		 569 int open_mode = opendata->o_arg.open_flags & O_EXCL;
570 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 571 nfs4_stateid stateid;
572 int ret = -EAGAIN;
573
aac00a8d 574 for (;;) {
dc0b027d 575 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 576 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 577 if (can_open_cached(state, fmode, open_mode)) {
578 update_open_stateflags(state, fmode);
6ee41268 579 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 580 goto out_return_state;
581 }
582 spin_unlock(&state->owner->so_lock);
583 }
34310430
TM		 584 rcu_read_lock();
585 delegation = rcu_dereference(nfsi->delegation);
586 if (delegation == NULL ||
dc0b027d 587 !can_open_delegated(delegation, fmode)) {
34310430 588 rcu_read_unlock();
aac00a8d 589 break;
34310430 590 }
aac00a8d
TM		 591 /* Save the delegation */
592 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
593 rcu_read_unlock();
af22f94a 594 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 595 if (ret != 0)
596 goto out;
597 ret = -EAGAIN;
34310430
TM		 598
599 /* Try to update the stateid using the delegation */
dc0b027d 600 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 601 goto out_return_state;
aac00a8d 602 }
aac00a8d
TM		 603out:
604 return ERR_PTR(ret);
605out_return_state:
606 atomic_inc(&state->count);
607 return state;
608}
609
24ac23ab
TM		 610static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
611{
612 struct inode *inode;
613 struct nfs4_state *state = NULL;
003707c7 614 struct nfs_delegation *delegation;
1b370bc2 615 int ret;
24ac23ab 616
aac00a8d 617 if (!data->rpc_done) {
6ee41268 618 state = nfs4_try_open_cached(data);
aac00a8d
TM		 619 goto out;
620 }
621
1b370bc2 622 ret = -EAGAIN;
24ac23ab 623 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 624 goto err;
24ac23ab 625 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 626 ret = PTR_ERR(inode);
03f28e3a 627 if (IS_ERR(inode))
1b370bc2
TM		 628 goto err;
629 ret = -ENOMEM;
24ac23ab
TM		 630 state = nfs4_get_open_state(inode, data->owner);
631 if (state == NULL)
1b370bc2 632 goto err_put_inode;
549d6ed5 633 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 634 int delegation_flags = 0;
635
003707c7
TM		 636 rcu_read_lock();
637 delegation = rcu_dereference(NFS_I(inode)->delegation);
638 if (delegation)
639 delegation_flags = delegation->flags;
640 rcu_read_unlock();
15c831bf 641 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 642 nfs_inode_set_delegation(state->inode,
643 data->owner->so_cred,
644 &data->o_res);
645 else
646 nfs_inode_reclaim_delegation(state->inode,
647 data->owner->so_cred,
648 &data->o_res);
649 }
34310430
TM		 650
651 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 652 data->o_arg.fmode);
24ac23ab 653 iput(inode);
aac00a8d 654out:
24ac23ab 655 return state;
1b370bc2
TM		 656err_put_inode:
657 iput(inode);
658err:
659 return ERR_PTR(ret);
24ac23ab
TM		 660}
661
864472e9
TM		 662static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
663{
664 struct nfs_inode *nfsi = NFS_I(state->inode);
665 struct nfs_open_context *ctx;
666
667 spin_lock(&state->inode->i_lock);
668 list_for_each_entry(ctx, &nfsi->open_files, list) {
669 if (ctx->state != state)
670 continue;
671 get_nfs_open_context(ctx);
672 spin_unlock(&state->inode->i_lock);
673 return ctx;
674 }
675 spin_unlock(&state->inode->i_lock);
676 return ERR_PTR(-ENOENT);
677}
678
6f220ed5
TM		 679static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
680{
681 struct nfs4_opendata *opendata;
682
dc0b027d 683 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 684 if (opendata == NULL)
685 return ERR_PTR(-ENOMEM);
686 opendata->state = state;
687 atomic_inc(&state->count);
688 return opendata;
689}
690
dc0b027d 691static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 692{
2ced46c2 693 struct nfs4_state *newstate;
864472e9
TM		 694 int ret;
695
dc0b027d
TM		 696 opendata->o_arg.open_flags = 0;
697 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 698 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
699 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
700 nfs4_init_opendata_res(opendata);
864472e9
TM		 701 ret = _nfs4_proc_open(opendata);
702 if (ret != 0)
703 return ret;
2ced46c2 704 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 705 if (IS_ERR(newstate))
706 return PTR_ERR(newstate);
dc0b027d 707 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 708 *res = newstate;
864472e9
TM		 709 return 0;
710}
711
712static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
713{
864472e9 714 struct nfs4_state *newstate;
864472e9
TM		 715 int ret;
716
717 /* memory barrier prior to reading state->n_* */
2ced46c2 718 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 719 smp_rmb();
720 if (state->n_rdwr != 0) {
2ced46c2 721 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 722 if (ret != 0)
723 return ret;
2ced46c2
TM		 724 if (newstate != state)
725 return -ESTALE;
864472e9
TM		 726 }
727 if (state->n_wronly != 0) {
2ced46c2 728 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 729 if (ret != 0)
730 return ret;
2ced46c2
TM		 731 if (newstate != state)
732 return -ESTALE;
864472e9
TM		 733 }
734 if (state->n_rdonly != 0) {
2ced46c2 735 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 736 if (ret != 0)
737 return ret;
2ced46c2
TM		 738 if (newstate != state)
739 return -ESTALE;
864472e9 740 }
1ac7e2fd
TM		 741 /*
742 * We may have performed cached opens for all three recoveries.
743 * Check if we need to update the current stateid.
744 */
745 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
746 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 747 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 748 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
749 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 750 write_sequnlock(&state->seqlock);
1ac7e2fd 751 }
864472e9
TM		 752 return 0;
753}
754
1da177e4
LT		 755/*
756 * OPEN_RECLAIM:
757 * reclaim state on the server after a reboot.
1da177e4 758 */
539cd03a 759static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 760{
1ac7e2fd 761 struct nfs_delegation *delegation;
864472e9 762 struct nfs4_opendata *opendata;
dc0b027d 763 fmode_t delegation_type = 0;
1da177e4
LT		 764 int status;
765
6f220ed5
TM		 766 opendata = nfs4_open_recoverdata_alloc(ctx, state);
767 if (IS_ERR(opendata))
768 return PTR_ERR(opendata);
864472e9
TM		 769 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
770 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 771 rcu_read_lock();
772 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 773 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 774 delegation_type = delegation->type;
1ac7e2fd 775 rcu_read_unlock();
864472e9
TM		 776 opendata->o_arg.u.delegation_type = delegation_type;
777 status = nfs4_open_recover(opendata, state);
c6d00e63 778 nfs4_opendata_put(opendata);
1da177e4
LT		 779 return status;
780}
781
539cd03a 782static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 783{
784 struct nfs_server *server = NFS_SERVER(state->inode);
785 struct nfs4_exception exception = { };
786 int err;
787 do {
539cd03a 788 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 789 if (err != -NFS4ERR_DELAY)
790 break;
791 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 792 } while (exception.retry);
793 return err;
794}
795
864472e9
TM		 796static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
797{
798 struct nfs_open_context *ctx;
799 int ret;
800
801 ctx = nfs4_state_find_open_context(state);
802 if (IS_ERR(ctx))
803 return PTR_ERR(ctx);
539cd03a 804 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 805 put_nfs_open_context(ctx);
806 return ret;
807}
808
13437e12 809static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 810{
e56e0b78 811 struct nfs4_opendata *opendata;
864472e9 812 int ret;
1da177e4 813
6f220ed5
TM		 814 opendata = nfs4_open_recoverdata_alloc(ctx, state);
815 if (IS_ERR(opendata))
816 return PTR_ERR(opendata);
e56e0b78 817 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 818 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 819 sizeof(opendata->o_arg.u.delegation.data));
864472e9 820 ret = nfs4_open_recover(opendata, state);
c6d00e63 821 nfs4_opendata_put(opendata);
864472e9 822 return ret;
1da177e4
LT		 823}
824
13437e12 825int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 826{
827 struct nfs4_exception exception = { };
539cd03a 828 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 829 int err;
830 do {
13437e12 831 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 832 switch (err) {
833 case 0:
834 return err;
835 case -NFS4ERR_STALE_CLIENTID:
836 case -NFS4ERR_STALE_STATEID:
837 case -NFS4ERR_EXPIRED:
838 /* Don't recall a delegation if it was lost */
7539bbab 839 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 840 return err;
841 }
842 err = nfs4_handle_exception(server, err, &exception);
843 } while (exception.retry);
844 return err;
845}
846
cdd4e68b
TM		 847static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
848{
849 struct nfs4_opendata *data = calldata;
850
851 data->rpc_status = task->tk_status;
852 if (RPC_ASSASSINATED(task))
853 return;
26e976a8 854 if (data->rpc_status == 0) {
cdd4e68b
TM		 855 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
856 sizeof(data->o_res.stateid.data));
bb22629e 857 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 858 renew_lease(data->o_res.server, data->timestamp);
3e309914 859 data->rpc_done = 1;
26e976a8 860 }
cdd4e68b
TM		 861}
862
863static void nfs4_open_confirm_release(void *calldata)
864{
865 struct nfs4_opendata *data = calldata;
866 struct nfs4_state *state = NULL;
867
868 /* If this request hasn't been cancelled, do nothing */
869 if (data->cancelled == 0)
870 goto out_free;
871 /* In case of error, no cleanup! */
3e309914 872 if (!data->rpc_done)
cdd4e68b 873 goto out_free;
cdd4e68b 874 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 875 if (!IS_ERR(state))
dc0b027d 876 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 877out_free:
c6d00e63 878 nfs4_opendata_put(data);
cdd4e68b
TM		 879}
880
881static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 882 .rpc_call_done = nfs4_open_confirm_done,
883 .rpc_release = nfs4_open_confirm_release,
884};
885
886/*
887 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
888 */
889static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
890{
891 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
892 struct rpc_task *task;
5138fde0
TM		 893 struct rpc_message msg = {
894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
895 .rpc_argp = &data->c_arg,
896 .rpc_resp = &data->c_res,
897 .rpc_cred = data->owner->so_cred,
898 };
c970aa85
TM		 899 struct rpc_task_setup task_setup_data = {
900 .rpc_client = server->client,
5138fde0 901 .rpc_message = &msg,
c970aa85
TM		 902 .callback_ops = &nfs4_open_confirm_ops,
903 .callback_data = data,
101070ca 904 .workqueue = nfsiod_workqueue,
c970aa85
TM		 905 .flags = RPC_TASK_ASYNC,
906 };
1da177e4
LT		 907 int status;
908
c6d00e63 909 kref_get(&data->kref);
3e309914
TM		 910 data->rpc_done = 0;
911 data->rpc_status = 0;
5138fde0 912 data->timestamp = jiffies;
c970aa85 913 task = rpc_run_task(&task_setup_data);
7a1218a2 914 if (IS_ERR(task))
cdd4e68b 915 return PTR_ERR(task);
cdd4e68b
TM		 916 status = nfs4_wait_for_completion_rpc_task(task);
917 if (status != 0) {
918 data->cancelled = 1;
919 smp_wmb();
920 } else
921 status = data->rpc_status;
e6b3c4db 922 rpc_put_task(task);
1da177e4
LT		 923 return status;
924}
925
24ac23ab 926static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 927{
24ac23ab
TM		 928 struct nfs4_opendata *data = calldata;
929 struct nfs4_state_owner *sp = data->owner;
5138fde0 930
24ac23ab
TM		 931 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
932 return;
aac00a8d
TM		 933 /*
934 * Check if we still need to send an OPEN call, or if we can use
935 * a delegation instead.
936 */
937 if (data->state != NULL) {
938 struct nfs_delegation *delegation;
939
dc0b027d 940 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 941 goto out_no_action;
aac00a8d
TM		 942 rcu_read_lock();
943 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
944 if (delegation != NULL &&
15c831bf 945 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 946 rcu_read_unlock();
6ee41268 947 goto out_no_action;
aac00a8d
TM		 948 }
949 rcu_read_unlock();
950 }
24ac23ab 951 /* Update sequence id. */
9f958ab8 952 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 953 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 954 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 955 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 956 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
957 }
26e976a8 958 data->timestamp = jiffies;
5138fde0 959 rpc_call_start(task);
6ee41268
TM		 960 return;
961out_no_action:
962 task->tk_action = NULL;
963
24ac23ab 964}
1da177e4 965
24ac23ab
TM		 966static void nfs4_open_done(struct rpc_task *task, void *calldata)
967{
968 struct nfs4_opendata *data = calldata;
1da177e4 969
24ac23ab
TM		 970 data->rpc_status = task->tk_status;
971 if (RPC_ASSASSINATED(task))
972 return;
973 if (task->tk_status == 0) {
974 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 975 case S_IFREG:
976 break;
977 case S_IFLNK:
24ac23ab 978 data->rpc_status = -ELOOP;
6f926b5b
TM		 979 break;
980 case S_IFDIR:
24ac23ab 981 data->rpc_status = -EISDIR;
6f926b5b
TM		 982 break;
983 default:
24ac23ab 984 data->rpc_status = -ENOTDIR;
6f926b5b 985 }
26e976a8 986 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 987 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
988 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 989 }
3e309914 990 data->rpc_done = 1;
24ac23ab 991}
6f926b5b 992
24ac23ab
TM		 993static void nfs4_open_release(void *calldata)
994{
995 struct nfs4_opendata *data = calldata;
996 struct nfs4_state *state = NULL;
997
998 /* If this request hasn't been cancelled, do nothing */
999 if (data->cancelled == 0)
1000 goto out_free;
1001 /* In case of error, no cleanup! */
3e309914 1002 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1003 goto out_free;
1004 /* In case we need an open_confirm, no cleanup! */
1005 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1006 goto out_free;
24ac23ab 1007 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1008 if (!IS_ERR(state))
dc0b027d 1009 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1010out_free:
c6d00e63 1011 nfs4_opendata_put(data);
24ac23ab
TM		 1012}
1013
1014static const struct rpc_call_ops nfs4_open_ops = {
1015 .rpc_call_prepare = nfs4_open_prepare,
1016 .rpc_call_done = nfs4_open_done,
1017 .rpc_release = nfs4_open_release,
1018};
1019
1020/*
1021 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1022 */
1023static int _nfs4_proc_open(struct nfs4_opendata *data)
1024{
1025 struct inode *dir = data->dir->d_inode;
1026 struct nfs_server *server = NFS_SERVER(dir);
1027 struct nfs_openargs *o_arg = &data->o_arg;
1028 struct nfs_openres *o_res = &data->o_res;
1029 struct rpc_task *task;
5138fde0
TM		 1030 struct rpc_message msg = {
1031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1032 .rpc_argp = o_arg,
1033 .rpc_resp = o_res,
1034 .rpc_cred = data->owner->so_cred,
1035 };
c970aa85
TM		 1036 struct rpc_task_setup task_setup_data = {
1037 .rpc_client = server->client,
5138fde0 1038 .rpc_message = &msg,
c970aa85
TM		 1039 .callback_ops = &nfs4_open_ops,
1040 .callback_data = data,
101070ca 1041 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1042 .flags = RPC_TASK_ASYNC,
1043 };
24ac23ab
TM		 1044 int status;
1045
c6d00e63 1046 kref_get(&data->kref);
3e309914
TM		 1047 data->rpc_done = 0;
1048 data->rpc_status = 0;
2ced46c2 1049 data->cancelled = 0;
c970aa85 1050 task = rpc_run_task(&task_setup_data);
7a1218a2 1051 if (IS_ERR(task))
24ac23ab 1052 return PTR_ERR(task);
24ac23ab
TM		 1053 status = nfs4_wait_for_completion_rpc_task(task);
1054 if (status != 0) {
1055 data->cancelled = 1;
1056 smp_wmb();
1057 } else
1058 status = data->rpc_status;
e6b3c4db 1059 rpc_put_task(task);
3e309914 1060 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1061 return status;
1062
9936781d
TM		 1063 if (o_res->fh.size == 0)
1064 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1065
56ae19f3
TM		 1066 if (o_arg->open_flags & O_CREAT) {
1067 update_changeattr(dir, &o_res->cinfo);
1068 nfs_post_op_update_inode(dir, o_res->dir_attr);
1069 } else
1070 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1071 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1072 status = _nfs4_proc_open_confirm(data);
1da177e4 1073 if (status != 0)
24ac23ab 1074 return status;
1da177e4
LT		 1075 }
1076 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1077 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1078 return 0;
1da177e4
LT		 1079}
1080
10afec90 1081static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1082{
7539bbab 1083 struct nfs_client *clp = server->nfs_client;
6b30954e 1084 int ret;
58d9714a 1085
6b30954e 1086 for (;;) {
65de872e 1087 ret = nfs4_wait_clnt_recover(clp);
6b30954e
TM		 1088 if (ret != 0)
1089 return ret;
e598d843
TM		 1090 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1091 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1092 break;
58d9714a 1093 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 1094 }
1095 return 0;
58d9714a
TM		 1096}
1097
1da177e4
LT		 1098/*
1099 * OPEN_EXPIRED:
1100 * reclaim state on the server after a network partition.
1101 * Assumes caller holds the appropriate lock
1102 */
539cd03a 1103static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1104{
e56e0b78 1105 struct nfs4_opendata *opendata;
864472e9 1106 int ret;
1da177e4 1107
6f220ed5
TM		 1108 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1109 if (IS_ERR(opendata))
1110 return PTR_ERR(opendata);
864472e9 1111 ret = nfs4_open_recover(opendata, state);
35d05778 1112 if (ret == -ESTALE)
539cd03a 1113 d_drop(ctx->path.dentry);
c6d00e63 1114 nfs4_opendata_put(opendata);
864472e9 1115 return ret;
1da177e4
LT		 1116}
1117
539cd03a 1118static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1119{
539cd03a 1120 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1121 struct nfs4_exception exception = { };
1122 int err;
1123
1124 do {
539cd03a 1125 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM		 1126 if (err != -NFS4ERR_DELAY)
1127 break;
1128 nfs4_handle_exception(server, err, &exception);
202b50dc
TM		 1129 } while (exception.retry);
1130 return err;
1131}
1132
1da177e4
LT		 1133static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1134{
1da177e4 1135 struct nfs_open_context *ctx;
864472e9 1136 int ret;
1da177e4 1137
864472e9
TM		 1138 ctx = nfs4_state_find_open_context(state);
1139 if (IS_ERR(ctx))
1140 return PTR_ERR(ctx);
539cd03a 1141 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1142 put_nfs_open_context(ctx);
1143 return ret;
1da177e4
LT		 1144}
1145
aa53ed54
JL		 1146/*
1147 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1148 * fields corresponding to attributes that were used to store the verifier.
1149 * Make sure we clobber those fields in the later setattr call
1150 */
1151static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1152{
1153 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1154 !(sattr->ia_valid & ATTR_ATIME_SET))
1155 sattr->ia_valid |= ATTR_ATIME;
1156
1157 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1158 !(sattr->ia_valid & ATTR_MTIME_SET))
1159 sattr->ia_valid |= ATTR_MTIME;
1160}
1161
1da177e4 1162/*
24ac23ab 1163 * Returns a referenced nfs4_state
1da177e4 1164 */
dc0b027d 1165static 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		 1166{
1167 struct nfs4_state_owner *sp;
1168 struct nfs4_state *state = NULL;
1169 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1170 struct nfs4_opendata *opendata;
aac00a8d 1171 int status;
1da177e4
LT		 1172
1173 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1174 status = -ENOMEM;
1175 if (!(sp = nfs4_get_state_owner(server, cred))) {
1176 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1177 goto out_err;
1178 }
58d9714a
TM		 1179 status = nfs4_recover_expired_lease(server);
1180 if (status != 0)
b4454fe1 1181 goto err_put_state_owner;
aac00a8d 1182 if (path->dentry->d_inode != NULL)
dc0b027d 1183 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1184 status = -ENOMEM;
dc0b027d 1185 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1186 if (opendata == NULL)
95d35cb4 1187 goto err_put_state_owner;
1da177e4 1188
aac00a8d
TM		 1189 if (path->dentry->d_inode != NULL)
1190 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1191
24ac23ab 1192 status = _nfs4_proc_open(opendata);
1da177e4 1193 if (status != 0)
c6d00e63 1194 goto err_opendata_put;
1da177e4 1195
aa53ed54
JL		 1196 if (opendata->o_arg.open_flags & O_EXCL)
1197 nfs4_exclusive_attrset(opendata, sattr);
1198
24ac23ab 1199 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1200 status = PTR_ERR(state);
1201 if (IS_ERR(state))
c6d00e63 1202 goto err_opendata_put;
c6d00e63 1203 nfs4_opendata_put(opendata);
1da177e4 1204 nfs4_put_state_owner(sp);
1da177e4
LT		 1205 *res = state;
1206 return 0;
c6d00e63
TM		 1207err_opendata_put:
1208 nfs4_opendata_put(opendata);
e56e0b78
TM		 1209err_put_state_owner:
1210 nfs4_put_state_owner(sp);
1da177e4 1211out_err:
1da177e4
LT		 1212 *res = NULL;
1213 return status;
1214}
1215
1216
dc0b027d 1217static 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		 1218{
1219 struct nfs4_exception exception = { };
1220 struct nfs4_state *res;
1221 int status;
1222
1223 do {
dc0b027d 1224 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1225 if (status == 0)
1226 break;
1227 /* NOTE: BAD_SEQID means the server and client disagree about the
1228 * book-keeping w.r.t. state-changing operations
1229 * (OPEN/CLOSE/LOCK/LOCKU...)
1230 * It is actually a sign of a bug on the client or on the server.
1231 *
1232 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1233 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1234 * have unhashed the old state_owner for us, and that we can
1235 * therefore safely retry using a new one. We should still warn
1236 * the user though...
1237 */
1238 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1239 printk(KERN_WARNING "NFS: v4 server %s "
1240 " returned a bad sequence-id error!\n",
1241 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1242 exception.retry = 1;
1243 continue;
1244 }
550f5747
TM		 1245 /*
1246 * BAD_STATEID on OPEN means that the server cancelled our
1247 * state before it received the OPEN_CONFIRM.
1248 * Recover by retrying the request as per the discussion
1249 * on Page 181 of RFC3530.
1250 */
1251 if (status == -NFS4ERR_BAD_STATEID) {
1252 exception.retry = 1;
1253 continue;
1254 }
aac00a8d
TM		 1255 if (status == -EAGAIN) {
1256 /* We must have found a delegation */
1257 exception.retry = 1;
1258 continue;
1259 }
1da177e4
LT		 1260 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1261 status, &exception));
1262 } while (exception.retry);
1263 return res;
1264}
1265
659bfcd6
TM		 1266static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1267 struct nfs_fattr *fattr, struct iattr *sattr,
1268 struct nfs4_state *state)
1da177e4 1269{
3e4f6290 1270 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1271 struct nfs_setattrargs arg = {
3e4f6290 1272 .fh = NFS_FH(inode),
1da177e4
LT		 1273 .iap = sattr,
1274 .server = server,
1275 .bitmask = server->attr_bitmask,
1276 };
1277 struct nfs_setattrres res = {
1278 .fattr = fattr,
1279 .server = server,
1280 };
1281 struct rpc_message msg = {
659bfcd6
TM		 1282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1283 .rpc_argp = &arg,
1284 .rpc_resp = &res,
1285 .rpc_cred = cred,
1da177e4 1286 };
26e976a8 1287 unsigned long timestamp = jiffies;
65e4308d 1288 int status;
1da177e4 1289
0e574af1 1290 nfs_fattr_init(fattr);
1da177e4 1291
3e4f6290
TM		 1292 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1293 /* Use that stateid */
1294 } else if (state != NULL) {
08e9eac4
TM		 1295 nfs4_copy_stateid(&arg.stateid, state, current->files);
1296 } else
1da177e4
LT		 1297 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1298
cccef3b9 1299 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1300 if (status == 0 && state != NULL)
1301 renew_lease(server, timestamp);
65e4308d 1302 return status;
1da177e4
LT		 1303}
1304
659bfcd6
TM		 1305static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1306 struct nfs_fattr *fattr, struct iattr *sattr,
1307 struct nfs4_state *state)
1da177e4 1308{
3e4f6290 1309 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1310 struct nfs4_exception exception = { };
1311 int err;
1312 do {
1313 err = nfs4_handle_exception(server,
659bfcd6 1314 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1315 &exception);
1316 } while (exception.retry);
1317 return err;
1318}
1319
1320struct nfs4_closedata {
4a35bd41 1321 struct path path;
1da177e4
LT		 1322 struct inode *inode;
1323 struct nfs4_state *state;
1324 struct nfs_closeargs arg;
1325 struct nfs_closeres res;
516a6af6 1326 struct nfs_fattr fattr;
26e976a8 1327 unsigned long timestamp;
1da177e4
LT		 1328};
1329
963d8fe5 1330static void nfs4_free_closedata(void *data)
9512135d 1331{
963d8fe5
TM		 1332 struct nfs4_closedata *calldata = data;
1333 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1334
1335 nfs4_put_open_state(calldata->state);
1336 nfs_free_seqid(calldata->arg.seqid);
9512135d 1337 nfs4_put_state_owner(sp);
31f31db1 1338 path_put(&calldata->path);
9512135d
TM		 1339 kfree(calldata);
1340}
1341
963d8fe5 1342static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1343{
963d8fe5 1344 struct nfs4_closedata *calldata = data;
1da177e4 1345 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1346 struct nfs_server *server = NFS_SERVER(calldata->inode);
1347
4ce70ada
TM		 1348 if (RPC_ASSASSINATED(task))
1349 return;
1da177e4
LT		 1350 /* hmm. we are done with the inode, and in the process of freeing
1351 * the state_owner. we keep this around to process errors
1352 */
1da177e4
LT		 1353 switch (task->tk_status) {
1354 case 0:
45328c35 1355 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1356 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1357 break;
1358 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1359 case -NFS4ERR_OLD_STATEID:
1360 case -NFS4ERR_BAD_STATEID:
1da177e4 1361 case -NFS4ERR_EXPIRED:
dc0b027d 1362 if (calldata->arg.fmode == 0)
9e33bed5 1363 break;
1da177e4 1364 default:
9e33bed5 1365 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1da177e4
LT		 1366 rpc_restart_call(task);
1367 return;
1368 }
1369 }
516a6af6 1370 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1371}
1372
4ce70ada 1373static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1374{
4ce70ada 1375 struct nfs4_closedata *calldata = data;
9512135d 1376 struct nfs4_state *state = calldata->state;
003707c7 1377 int clear_rd, clear_wr, clear_rdwr;
9512135d 1378
963d8fe5 1379 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1380 return;
003707c7 1381
003707c7 1382 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1383 spin_lock(&state->owner->so_lock);
003707c7 1384 /* Calculate the change in open mode */
e7616923 1385 if (state->n_rdwr == 0) {
003707c7 1386 if (state->n_rdonly == 0) {
003707c7
TM		 1387 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1388 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1389 }
1390 if (state->n_wronly == 0) {
003707c7
TM		 1391 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1392 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1393 }
e7616923 1394 }
4cecb76f 1395 spin_unlock(&state->owner->so_lock);
003707c7 1396 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1397 /* Note: exit _without_ calling nfs4_close_done */
1398 task->tk_action = NULL;
9512135d
TM		 1399 return;
1400 }
516a6af6 1401 nfs_fattr_init(calldata->res.fattr);
45328c35 1402 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1403 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1404 calldata->arg.fmode = FMODE_READ;
45328c35 1405 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1406 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1407 calldata->arg.fmode = FMODE_WRITE;
45328c35 1408 }
26e976a8 1409 calldata->timestamp = jiffies;
5138fde0 1410 rpc_call_start(task);
1da177e4
LT		 1411}
1412
963d8fe5 1413static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1414 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1415 .rpc_call_done = nfs4_close_done,
1416 .rpc_release = nfs4_free_closedata,
1417};
1418
1da177e4
LT		 1419/*
1420 * It is possible for data to be read/written from a mem-mapped file
1421 * after the sys_close call (which hits the vfs layer as a flush).
1422 * This means that we can't safely call nfsv4 close on a file until
1423 * the inode is cleared. This in turn means that we are not good
1424 * NFSv4 citizens - we do not indicate to the server to update the file's
1425 * share state even when we are done with one of the three share
1426 * stateid's in the inode.
1427 *
1428 * NOTE: Caller must be holding the sp->so_owner semaphore!
1429 */
a49c3c77 1430int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1431{
4a35bd41 1432 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1433 struct nfs4_closedata *calldata;
b39e625b
TM		 1434 struct nfs4_state_owner *sp = state->owner;
1435 struct rpc_task *task;
5138fde0
TM		 1436 struct rpc_message msg = {
1437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1438 .rpc_cred = state->owner->so_cred,
1439 };
c970aa85
TM		 1440 struct rpc_task_setup task_setup_data = {
1441 .rpc_client = server->client,
5138fde0 1442 .rpc_message = &msg,
c970aa85 1443 .callback_ops = &nfs4_close_ops,
101070ca 1444 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1445 .flags = RPC_TASK_ASYNC,
1446 };
9512135d 1447 int status = -ENOMEM;
1da177e4 1448
9512135d 1449 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1450 if (calldata == NULL)
9512135d 1451 goto out;
4a35bd41 1452 calldata->inode = state->inode;
1da177e4 1453 calldata->state = state;
4a35bd41 1454 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1455 calldata->arg.stateid = &state->open_stateid;
1da177e4 1456 /* Serialization for the sequence id */
cee54fc9 1457 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1458 if (calldata->arg.seqid == NULL)
1459 goto out_free_calldata;
dc0b027d 1460 calldata->arg.fmode = 0;
a65318bf 1461 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1462 calldata->res.fattr = &calldata->fattr;
c1d51931 1463 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1464 calldata->res.server = server;
4a35bd41
TM		 1465 calldata->path.mnt = mntget(path->mnt);
1466 calldata->path.dentry = dget(path->dentry);
9512135d 1467
5138fde0
TM		 1468 msg.rpc_argp = &calldata->arg,
1469 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1470 task_setup_data.callback_data = calldata;
1471 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1472 if (IS_ERR(task))
1473 return PTR_ERR(task);
a49c3c77
TM		 1474 status = 0;
1475 if (wait)
1476 status = rpc_wait_for_completion_task(task);
b39e625b 1477 rpc_put_task(task);
a49c3c77 1478 return status;
9512135d
TM		 1479out_free_calldata:
1480 kfree(calldata);
1481out:
b39e625b
TM		 1482 nfs4_put_open_state(state);
1483 nfs4_put_state_owner(sp);
9512135d 1484 return status;
1da177e4
LT		 1485}
1486
dc0b027d 1487static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1488{
1489 struct file *filp;
1b45c46c 1490 int ret;
02a913a7 1491
1b45c46c 1492 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1493 if (fmode & FMODE_EXEC) {
af22f94a 1494 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1495 state->owner->so_cred,
1496 nd->intent.open.flags);
1497 if (ret < 0)
1498 goto out_close;
1499 }
4a35bd41 1500 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1501 if (!IS_ERR(filp)) {
1502 struct nfs_open_context *ctx;
cd3758e3 1503 ctx = nfs_file_open_context(filp);
02a913a7 1504 ctx->state = state;
95cf959b
TM		 1505 return 0;
1506 }
1b45c46c
TM		 1507 ret = PTR_ERR(filp);
1508out_close:
dc0b027d 1509 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1510 return ret;
02a913a7
TM		 1511}
1512
1513struct dentry *
1da177e4
LT		 1514nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1515{
ad389da7 1516 struct path path = {
4ac91378 1517 .mnt = nd->path.mnt,
ad389da7
TM		 1518 .dentry = dentry,
1519 };
4ac91378 1520 struct dentry *parent;
1da177e4
LT		 1521 struct iattr attr;
1522 struct rpc_cred *cred;
1523 struct nfs4_state *state;
02a913a7 1524 struct dentry *res;
dc0b027d 1525 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1526
1527 if (nd->flags & LOOKUP_CREATE) {
1528 attr.ia_mode = nd->intent.open.create_mode;
1529 attr.ia_valid = ATTR_MODE;
1530 if (!IS_POSIXACL(dir))
ce3b0f8d 1531 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1532 } else {
1533 attr.ia_valid = 0;
1534 BUG_ON(nd->intent.open.flags & O_CREAT);
1535 }
1536
98a8e323 1537 cred = rpc_lookup_cred();
1da177e4 1538 if (IS_ERR(cred))
02a913a7 1539 return (struct dentry *)cred;
565277f6
TM		 1540 parent = dentry->d_parent;
1541 /* Protect against concurrent sillydeletes */
1542 nfs_block_sillyrename(parent);
dc0b027d 1543 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1544 put_rpccred(cred);
02a913a7 1545 if (IS_ERR(state)) {
d75340cc 1546 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1547 d_add(dentry, NULL);
d75340cc
TM		 1548 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1549 }
565277f6 1550 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1551 return (struct dentry *)state;
1552 }
24ac23ab 1553 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1554 if (res != NULL)
deee9369 1555 path.dentry = res;
d75340cc 1556 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1557 nfs_unblock_sillyrename(parent);
dc0b027d 1558 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1559 return res;
1da177e4
LT		 1560}
1561
1562int
02a913a7 1563nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1564{
ad389da7 1565 struct path path = {
4ac91378 1566 .mnt = nd->path.mnt,
ad389da7
TM		 1567 .dentry = dentry,
1568 };
1da177e4
LT		 1569 struct rpc_cred *cred;
1570 struct nfs4_state *state;
dc0b027d 1571 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1572
98a8e323 1573 cred = rpc_lookup_cred();
1da177e4
LT		 1574 if (IS_ERR(cred))
1575 return PTR_ERR(cred);
dc0b027d 1576 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1577 put_rpccred(cred);
02a913a7
TM		 1578 if (IS_ERR(state)) {
1579 switch (PTR_ERR(state)) {
1580 case -EPERM:
1581 case -EACCES:
1582 case -EDQUOT:
1583 case -ENOSPC:
1584 case -EROFS:
1585 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1586 return 1;
b87c0adf
CL		 1587 default:
1588 goto out_drop;
02a913a7 1589 }
02a913a7 1590 }
24ac23ab 1591 if (state->inode == dentry->d_inode) {
d75340cc 1592 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1593 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1594 return 1;
1595 }
dc0b027d 1596 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1597out_drop:
1598 d_drop(dentry);
1da177e4
LT		 1599 return 0;
1600}
1601
7fe5c398
TM		 1602void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1603{
1604 if (ctx->state == NULL)
1605 return;
1606 if (is_sync)
1607 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1608 else
1609 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1610}
1da177e4
LT		 1611
1612static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1613{
43652ad5
BH		 1614 struct nfs4_server_caps_arg args = {
1615 .fhandle = fhandle,
1616 };
1da177e4
LT		 1617 struct nfs4_server_caps_res res = {};
1618 struct rpc_message msg = {
1619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 1620 .rpc_argp = &args,
1da177e4
LT		 1621 .rpc_resp = &res,
1622 };
1623 int status;
1624
cccef3b9 1625 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1626 if (status == 0) {
1627 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1628 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1629 server->caps |= NFS_CAP_ACLS;
1630 if (res.has_links != 0)
1631 server->caps |= NFS_CAP_HARDLINKS;
1632 if (res.has_symlinks != 0)
1633 server->caps |= NFS_CAP_SYMLINKS;
a65318bf
TM		 1634 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1635 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1636 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 1637 server->acl_bitmask = res.acl_bitmask;
1638 }
cccef3b9 1639
1da177e4
LT		 1640 return status;
1641}
1642
55a97593 1643int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1644{
1645 struct nfs4_exception exception = { };
1646 int err;
1647 do {
1648 err = nfs4_handle_exception(server,
1649 _nfs4_server_capabilities(server, fhandle),
1650 &exception);
1651 } while (exception.retry);
1652 return err;
1653}
1654
1655static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1656 struct nfs_fsinfo *info)
1657{
1da177e4
LT		 1658 struct nfs4_lookup_root_arg args = {
1659 .bitmask = nfs4_fattr_bitmap,
1660 };
1661 struct nfs4_lookup_res res = {
1662 .server = server,
0e574af1 1663 .fattr = info->fattr,
1da177e4
LT		 1664 .fh = fhandle,
1665 };
1666 struct rpc_message msg = {
1667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1668 .rpc_argp = &args,
1669 .rpc_resp = &res,
1670 };
0e574af1 1671 nfs_fattr_init(info->fattr);
cccef3b9 1672 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1673}
1674
1675static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1676 struct nfs_fsinfo *info)
1677{
1678 struct nfs4_exception exception = { };
1679 int err;
1680 do {
1681 err = nfs4_handle_exception(server,
1682 _nfs4_lookup_root(server, fhandle, info),
1683 &exception);
1684 } while (exception.retry);
1685 return err;
1686}
1687
54ceac45
DH		 1688/*
1689 * get the file handle for the "/" directory on the server
1690 */
1da177e4 1691static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1692 struct nfs_fsinfo *info)
1da177e4 1693{
1da177e4
LT		 1694 int status;
1695
1da177e4 1696 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1697 if (status == 0)
1698 status = nfs4_server_capabilities(server, fhandle);
1699 if (status == 0)
1700 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1701 return nfs4_map_errors(status);
1da177e4
LT		 1702}
1703
6b97fd3d
MN		 1704/*
1705 * Get locations and (maybe) other attributes of a referral.
1706 * Note that we'll actually follow the referral later when
1707 * we detect fsid mismatch in inode revalidation
1708 */
56659e99 1709static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1710{
1711 int status = -ENOMEM;
1712 struct page *page = NULL;
1713 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1714
1715 page = alloc_page(GFP_KERNEL);
1716 if (page == NULL)
1717 goto out;
1718 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1719 if (locations == NULL)
1720 goto out;
1721
c228fd3a 1722 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1723 if (status != 0)
1724 goto out;
1725 /* Make sure server returned a different fsid for the referral */
1726 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 1727 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 1728 status = -EIO;
1729 goto out;
1730 }
1731
1732 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1733 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1734 if (!fattr->mode)
1735 fattr->mode = S_IFDIR;
1736 memset(fhandle, 0, sizeof(struct nfs_fh));
1737out:
1738 if (page)
1739 __free_page(page);
1740 if (locations)
1741 kfree(locations);
1742 return status;
1743}
1744
1da177e4
LT		 1745static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1746{
1747 struct nfs4_getattr_arg args = {
1748 .fh = fhandle,
1749 .bitmask = server->attr_bitmask,
1750 };
1751 struct nfs4_getattr_res res = {
1752 .fattr = fattr,
1753 .server = server,
1754 };
1755 struct rpc_message msg = {
1756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1757 .rpc_argp = &args,
1758 .rpc_resp = &res,
1759 };
1760
0e574af1 1761 nfs_fattr_init(fattr);
cccef3b9 1762 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1763}
1764
1765static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1766{
1767 struct nfs4_exception exception = { };
1768 int err;
1769 do {
1770 err = nfs4_handle_exception(server,
1771 _nfs4_proc_getattr(server, fhandle, fattr),
1772 &exception);
1773 } while (exception.retry);
1774 return err;
1775}
1776
1777/*
1778 * The file is not closed if it is opened due to the a request to change
1779 * the size of the file. The open call will not be needed once the
1780 * VFS layer lookup-intents are implemented.
1781 *
1782 * Close is called when the inode is destroyed.
1783 * If we haven't opened the file for O_WRONLY, we
1784 * need to in the size_change case to obtain a stateid.
1785 *
1786 * Got race?
1787 * Because OPEN is always done by name in nfsv4, it is
1788 * possible that we opened a different file by the same
1789 * name. We can recognize this race condition, but we
1790 * can't do anything about it besides returning an error.
1791 *
1792 * This will be fixed with VFS changes (lookup-intent).
1793 */
1794static int
1795nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1796 struct iattr *sattr)
1797{
08e9eac4 1798 struct inode *inode = dentry->d_inode;
659bfcd6 1799 struct rpc_cred *cred = NULL;
d530838b 1800 struct nfs4_state *state = NULL;
1da177e4
LT		 1801 int status;
1802
0e574af1 1803 nfs_fattr_init(fattr);
1da177e4 1804
d530838b 1805 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 1806 if (sattr->ia_valid & ATTR_FILE) {
1807 struct nfs_open_context *ctx;
1808
1809 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 1810 if (ctx) {
1811 cred = ctx->cred;
1812 state = ctx->state;
1813 }
659bfcd6 1814 }
08e9eac4 1815
659bfcd6 1816 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 1817 if (status == 0)
1818 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 1819 return status;
1820}
1821
56659e99
TM		 1822static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1823 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1824 struct nfs_fattr *fattr)
1825{
1826 int status;
1827 struct nfs4_lookup_arg args = {
1828 .bitmask = server->attr_bitmask,
1829 .dir_fh = dirfh,
1830 .name = name,
1831 };
1832 struct nfs4_lookup_res res = {
1833 .server = server,
1834 .fattr = fattr,
1835 .fh = fhandle,
1836 };
1837 struct rpc_message msg = {
1838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1839 .rpc_argp = &args,
1840 .rpc_resp = &res,
1841 };
1842
1843 nfs_fattr_init(fattr);
1844
1845 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 1846 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 1847 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1848 return status;
1849}
1850
1851static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1852 struct qstr *name, struct nfs_fh *fhandle,
1853 struct nfs_fattr *fattr)
1854{
1855 struct nfs4_exception exception = { };
1856 int err;
1857 do {
4e56e082
TM		 1858 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1859 /* FIXME: !!!! */
1860 if (err == -NFS4ERR_MOVED) {
1861 err = -EREMOTE;
1862 break;
1863 }
1864 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1865 } while (exception.retry);
1866 return err;
1867}
1868
56659e99 1869static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1870 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1871{
4e56e082 1872 int status;
1da177e4
LT		 1873
1874 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1875 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1876 if (status == -NFS4ERR_MOVED)
1877 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1878 dprintk("NFS reply lookup: %d\n", status);
1879 return status;
1880}
1881
1882static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1883{
1884 struct nfs4_exception exception = { };
1885 int err;
1886 do {
1887 err = nfs4_handle_exception(NFS_SERVER(dir),
1888 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1889 &exception);
1890 } while (exception.retry);
1891 return err;
1892}
1893
1894static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1895{
76b32999
TM		 1896 struct nfs_server *server = NFS_SERVER(inode);
1897 struct nfs_fattr fattr;
1da177e4
LT		 1898 struct nfs4_accessargs args = {
1899 .fh = NFS_FH(inode),
76b32999
TM		 1900 .bitmask = server->attr_bitmask,
1901 };
1902 struct nfs4_accessres res = {
1903 .server = server,
1904 .fattr = &fattr,
1da177e4 1905 };
1da177e4
LT		 1906 struct rpc_message msg = {
1907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1908 .rpc_argp = &args,
1909 .rpc_resp = &res,
1910 .rpc_cred = entry->cred,
1911 };
1912 int mode = entry->mask;
1913 int status;
1914
1915 /*
1916 * Determine which access bits we want to ask for...
1917 */
1918 if (mode & MAY_READ)
1919 args.access |= NFS4_ACCESS_READ;
1920 if (S_ISDIR(inode->i_mode)) {
1921 if (mode & MAY_WRITE)
1922 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1923 if (mode & MAY_EXEC)
1924 args.access |= NFS4_ACCESS_LOOKUP;
1925 } else {
1926 if (mode & MAY_WRITE)
1927 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1928 if (mode & MAY_EXEC)
1929 args.access |= NFS4_ACCESS_EXECUTE;
1930 }
76b32999 1931 nfs_fattr_init(&fattr);
cccef3b9 1932 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1933 if (!status) {
1934 entry->mask = 0;
1935 if (res.access & NFS4_ACCESS_READ)
1936 entry->mask |= MAY_READ;
1937 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1938 entry->mask |= MAY_WRITE;
1939 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1940 entry->mask |= MAY_EXEC;
76b32999 1941 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1942 }
1943 return status;
1944}
1945
1946static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1947{
1948 struct nfs4_exception exception = { };
1949 int err;
1950 do {
1951 err = nfs4_handle_exception(NFS_SERVER(inode),
1952 _nfs4_proc_access(inode, entry),
1953 &exception);
1954 } while (exception.retry);
1955 return err;
1956}
1957
1958/*
1959 * TODO: For the time being, we don't try to get any attributes
1960 * along with any of the zero-copy operations READ, READDIR,
1961 * READLINK, WRITE.
1962 *
1963 * In the case of the first three, we want to put the GETATTR
1964 * after the read-type operation -- this is because it is hard
1965 * to predict the length of a GETATTR response in v4, and thus
1966 * align the READ data correctly. This means that the GETATTR
1967 * may end up partially falling into the page cache, and we should
1968 * shift it into the 'tail' of the xdr_buf before processing.
1969 * To do this efficiently, we need to know the total length
1970 * of data received, which doesn't seem to be available outside
1971 * of the RPC layer.
1972 *
1973 * In the case of WRITE, we also want to put the GETATTR after
1974 * the operation -- in this case because we want to make sure
1975 * we get the post-operation mtime and size. This means that
1976 * we can't use xdr_encode_pages() as written: we need a variant
1977 * of it which would leave room in the 'tail' iovec.
1978 *
1979 * Both of these changes to the XDR layer would in fact be quite
1980 * minor, but I decided to leave them for a subsequent patch.
1981 */
1982static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1983 unsigned int pgbase, unsigned int pglen)
1984{
1985 struct nfs4_readlink args = {
1986 .fh = NFS_FH(inode),
1987 .pgbase = pgbase,
1988 .pglen = pglen,
1989 .pages = &page,
1990 };
f50c7000 1991 struct nfs4_readlink_res res;
1da177e4
LT		 1992 struct rpc_message msg = {
1993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1994 .rpc_argp = &args,
f50c7000 1995 .rpc_resp = &res,
1da177e4
LT		 1996 };
1997
cccef3b9 1998 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 1999}
2000
2001static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2002 unsigned int pgbase, unsigned int pglen)
2003{
2004 struct nfs4_exception exception = { };
2005 int err;
2006 do {
2007 err = nfs4_handle_exception(NFS_SERVER(inode),
2008 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2009 &exception);
2010 } while (exception.retry);
2011 return err;
2012}
2013
1da177e4
LT		 2014/*
2015 * Got race?
2016 * We will need to arrange for the VFS layer to provide an atomic open.
2017 * Until then, this create/open method is prone to inefficiency and race
2018 * conditions due to the lookup, create, and open VFS calls from sys_open()
2019 * placed on the wire.
2020 *
2021 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2022 * The file will be opened again in the subsequent VFS open call
2023 * (nfs4_proc_file_open).
2024 *
2025 * The open for read will just hang around to be used by any process that
2026 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2027 */
2028
2029static int
2030nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2031 int flags, struct nameidata *nd)
1da177e4 2032{
ad389da7 2033 struct path path = {
4ac91378 2034 .mnt = nd->path.mnt,
ad389da7
TM		 2035 .dentry = dentry,
2036 };
1da177e4
LT		 2037 struct nfs4_state *state;
2038 struct rpc_cred *cred;
dc0b027d 2039 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2040 int status = 0;
2041
98a8e323 2042 cred = rpc_lookup_cred();
1da177e4
LT		 2043 if (IS_ERR(cred)) {
2044 status = PTR_ERR(cred);
2045 goto out;
2046 }
dc0b027d 2047 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2048 d_drop(dentry);
1da177e4
LT		 2049 if (IS_ERR(state)) {
2050 status = PTR_ERR(state);
659bfcd6 2051 goto out_putcred;
1da177e4 2052 }
d4d9cdcb 2053 d_add(dentry, igrab(state->inode));
d75340cc 2054 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2055 if (flags & O_EXCL) {
2056 struct nfs_fattr fattr;
659bfcd6 2057 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2058 if (status == 0)
65e4308d 2059 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2060 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2061 }
ad389da7 2062 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2063 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2064 else
dc0b027d 2065 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2066out_putcred:
2067 put_rpccred(cred);
1da177e4
LT		 2068out:
2069 return status;
2070}
2071
2072static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2073{
16e42959 2074 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2075 struct nfs_removeargs args = {
1da177e4 2076 .fh = NFS_FH(dir),
4fdc17b2
TM		 2077 .name.len = name->len,
2078 .name.name = name->name,
16e42959
TM		 2079 .bitmask = server->attr_bitmask,
2080 };
4fdc17b2 2081 struct nfs_removeres res = {
16e42959 2082 .server = server,
1da177e4 2083 };
1da177e4 2084 struct rpc_message msg = {
4fdc17b2
TM		 2085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2086 .rpc_argp = &args,
2087 .rpc_resp = &res,
1da177e4
LT		 2088 };
2089 int status;
2090
4fdc17b2 2091 nfs_fattr_init(&res.dir_attr);
cccef3b9 2092 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2093 if (status == 0) {
2094 update_changeattr(dir, &res.cinfo);
4fdc17b2 2095 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2096 }
1da177e4
LT		 2097 return status;
2098}
2099
2100static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2101{
2102 struct nfs4_exception exception = { };
2103 int err;
2104 do {
2105 err = nfs4_handle_exception(NFS_SERVER(dir),
2106 _nfs4_proc_remove(dir, name),
2107 &exception);
2108 } while (exception.retry);
2109 return err;
2110}
2111
e4eff1a6 2112static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2113{
e4eff1a6
TM		 2114 struct nfs_server *server = NFS_SERVER(dir);
2115 struct nfs_removeargs *args = msg->rpc_argp;
2116 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2117
a65318bf 2118 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2119 res->server = server;
1da177e4 2120 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2121}
2122
e4eff1a6 2123static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2124{
e4eff1a6
TM		 2125 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2126
9e33bed5 2127 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2128 return 0;
2129 update_changeattr(dir, &res->cinfo);
2130 nfs_post_op_update_inode(dir, &res->dir_attr);
2131 return 1;
1da177e4
LT		 2132}
2133
2134static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2135 struct inode *new_dir, struct qstr *new_name)
2136{
6caf2c82 2137 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2138 struct nfs4_rename_arg arg = {
2139 .old_dir = NFS_FH(old_dir),
2140 .new_dir = NFS_FH(new_dir),
2141 .old_name = old_name,
2142 .new_name = new_name,
6caf2c82
TM		 2143 .bitmask = server->attr_bitmask,
2144 };
2145 struct nfs_fattr old_fattr, new_fattr;
2146 struct nfs4_rename_res res = {
2147 .server = server,
2148 .old_fattr = &old_fattr,
2149 .new_fattr = &new_fattr,
1da177e4 2150 };
1da177e4
LT		 2151 struct rpc_message msg = {
2152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2153 .rpc_argp = &arg,
2154 .rpc_resp = &res,
2155 };
2156 int status;
2157
6caf2c82
TM		 2158 nfs_fattr_init(res.old_fattr);
2159 nfs_fattr_init(res.new_fattr);
cccef3b9 2160 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2161
2162 if (!status) {
2163 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2164 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2165 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2166 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2167 }
2168 return status;
2169}
2170
2171static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2172 struct inode *new_dir, struct qstr *new_name)
2173{
2174 struct nfs4_exception exception = { };
2175 int err;
2176 do {
2177 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2178 _nfs4_proc_rename(old_dir, old_name,
2179 new_dir, new_name),
2180 &exception);
2181 } while (exception.retry);
2182 return err;
2183}
2184
2185static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2186{
91ba2eee 2187 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2188 struct nfs4_link_arg arg = {
2189 .fh = NFS_FH(inode),
2190 .dir_fh = NFS_FH(dir),
2191 .name = name,
91ba2eee
TM		 2192 .bitmask = server->attr_bitmask,
2193 };
2194 struct nfs_fattr fattr, dir_attr;
2195 struct nfs4_link_res res = {
2196 .server = server,
2197 .fattr = &fattr,
2198 .dir_attr = &dir_attr,
1da177e4 2199 };
1da177e4
LT		 2200 struct rpc_message msg = {
2201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2202 .rpc_argp = &arg,
91ba2eee 2203 .rpc_resp = &res,
1da177e4
LT		 2204 };
2205 int status;
2206
91ba2eee
TM		 2207 nfs_fattr_init(res.fattr);
2208 nfs_fattr_init(res.dir_attr);
cccef3b9 2209 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2210 if (!status) {
2211 update_changeattr(dir, &res.cinfo);
2212 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2213 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2214 }
1da177e4
LT		 2215
2216 return status;
2217}
2218
2219static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2220{
2221 struct nfs4_exception exception = { };
2222 int err;
2223 do {
2224 err = nfs4_handle_exception(NFS_SERVER(inode),
2225 _nfs4_proc_link(inode, dir, name),
2226 &exception);
2227 } while (exception.retry);
2228 return err;
2229}
2230
57dc9a57
TM		 2231struct nfs4_createdata {
2232 struct rpc_message msg;
2233 struct nfs4_create_arg arg;
2234 struct nfs4_create_res res;
2235 struct nfs_fh fh;
2236 struct nfs_fattr fattr;
2237 struct nfs_fattr dir_fattr;
2238};
2239
2240static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2241 struct qstr *name, struct iattr *sattr, u32 ftype)
2242{
2243 struct nfs4_createdata *data;
2244
2245 data = kzalloc(sizeof(*data), GFP_KERNEL);
2246 if (data != NULL) {
2247 struct nfs_server *server = NFS_SERVER(dir);
2248
2249 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2250 data->msg.rpc_argp = &data->arg;
2251 data->msg.rpc_resp = &data->res;
2252 data->arg.dir_fh = NFS_FH(dir);
2253 data->arg.server = server;
2254 data->arg.name = name;
2255 data->arg.attrs = sattr;
2256 data->arg.ftype = ftype;
2257 data->arg.bitmask = server->attr_bitmask;
2258 data->res.server = server;
2259 data->res.fh = &data->fh;
2260 data->res.fattr = &data->fattr;
2261 data->res.dir_fattr = &data->dir_fattr;
2262 nfs_fattr_init(data->res.fattr);
2263 nfs_fattr_init(data->res.dir_fattr);
2264 }
2265 return data;
2266}
2267
2268static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2269{
cccef3b9
AA		 2270 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2271 &data->arg, &data->res, 1);
57dc9a57
TM		 2272 if (status == 0) {
2273 update_changeattr(dir, &data->res.dir_cinfo);
2274 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2275 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2276 }
2277 return status;
2278}
2279
2280static void nfs4_free_createdata(struct nfs4_createdata *data)
2281{
2282 kfree(data);
2283}
2284
4f390c15 2285static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2286 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2287{
57dc9a57
TM		 2288 struct nfs4_createdata *data;
2289 int status = -ENAMETOOLONG;
1da177e4 2290
94a6d753 2291 if (len > NFS4_MAXPATHLEN)
57dc9a57 2292 goto out;
4f390c15 2293
57dc9a57
TM		 2294 status = -ENOMEM;
2295 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2296 if (data == NULL)
2297 goto out;
2298
2299 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2300 data->arg.u.symlink.pages = &page;
2301 data->arg.u.symlink.len = len;
1da177e4 2302
57dc9a57
TM		 2303 status = nfs4_do_create(dir, dentry, data);
2304
2305 nfs4_free_createdata(data);
2306out:
1da177e4
LT		 2307 return status;
2308}
2309
4f390c15 2310static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2311 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2312{
2313 struct nfs4_exception exception = { };
2314 int err;
2315 do {
2316 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2317 _nfs4_proc_symlink(dir, dentry, page,
2318 len, sattr),
1da177e4
LT		 2319 &exception);
2320 } while (exception.retry);
2321 return err;
2322}
2323
2324static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2325 struct iattr *sattr)
2326{
57dc9a57
TM		 2327 struct nfs4_createdata *data;
2328 int status = -ENOMEM;
1da177e4 2329
57dc9a57
TM		 2330 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2331 if (data == NULL)
2332 goto out;
2333
2334 status = nfs4_do_create(dir, dentry, data);
2335
2336 nfs4_free_createdata(data);
2337out:
1da177e4
LT		 2338 return status;
2339}
2340
2341static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2342 struct iattr *sattr)
2343{
2344 struct nfs4_exception exception = { };
2345 int err;
2346 do {
2347 err = nfs4_handle_exception(NFS_SERVER(dir),
2348 _nfs4_proc_mkdir(dir, dentry, sattr),
2349 &exception);
2350 } while (exception.retry);
2351 return err;
2352}
2353
2354static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2355 u64 cookie, struct page *page, unsigned int count, int plus)
2356{
2357 struct inode *dir = dentry->d_inode;
2358 struct nfs4_readdir_arg args = {
2359 .fh = NFS_FH(dir),
2360 .pages = &page,
2361 .pgbase = 0,
2362 .count = count,
a65318bf 2363 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
1da177e4
LT		 2364 };
2365 struct nfs4_readdir_res res;
2366 struct rpc_message msg = {
2367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2368 .rpc_argp = &args,
2369 .rpc_resp = &res,
2370 .rpc_cred = cred,
2371 };
2372 int status;
2373
3110ff80 2374 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2375 dentry->d_parent->d_name.name,
2376 dentry->d_name.name,
2377 (unsigned long long)cookie);
1da177e4
LT		 2378 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2379 res.pgbase = args.pgbase;
cccef3b9 2380 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2381 if (status == 0)
2382 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2383
2384 nfs_invalidate_atime(dir);
2385
3110ff80 2386 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2387 return status;
2388}
2389
2390static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2391 u64 cookie, struct page *page, unsigned int count, int plus)
2392{
2393 struct nfs4_exception exception = { };
2394 int err;
2395 do {
2396 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2397 _nfs4_proc_readdir(dentry, cred, cookie,
2398 page, count, plus),
2399 &exception);
2400 } while (exception.retry);
2401 return err;
2402}
2403
2404static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2405 struct iattr *sattr, dev_t rdev)
2406{
57dc9a57
TM		 2407 struct nfs4_createdata *data;
2408 int mode = sattr->ia_mode;
2409 int status = -ENOMEM;
1da177e4
LT		 2410
2411 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2412 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2413
2414 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2415 if (data == NULL)
2416 goto out;
2417
1da177e4 2418 if (S_ISFIFO(mode))
57dc9a57 2419 data->arg.ftype = NF4FIFO;
1da177e4 2420 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2421 data->arg.ftype = NF4BLK;
2422 data->arg.u.device.specdata1 = MAJOR(rdev);
2423 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2424 }
2425 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2426 data->arg.ftype = NF4CHR;
2427 data->arg.u.device.specdata1 = MAJOR(rdev);
2428 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2429 }
1da177e4 2430
57dc9a57
TM		 2431 status = nfs4_do_create(dir, dentry, data);
2432
2433 nfs4_free_createdata(data);
2434out:
1da177e4
LT		 2435 return status;
2436}
2437
2438static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2439 struct iattr *sattr, dev_t rdev)
2440{
2441 struct nfs4_exception exception = { };
2442 int err;
2443 do {
2444 err = nfs4_handle_exception(NFS_SERVER(dir),
2445 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2446 &exception);
2447 } while (exception.retry);
2448 return err;
2449}
2450
2451static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2452 struct nfs_fsstat *fsstat)
2453{
2454 struct nfs4_statfs_arg args = {
2455 .fh = fhandle,
2456 .bitmask = server->attr_bitmask,
2457 };
24ad148a
BH		 2458 struct nfs4_statfs_res res = {
2459 .fsstat = fsstat,
2460 };
1da177e4
LT		 2461 struct rpc_message msg = {
2462 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2463 .rpc_argp = &args,
24ad148a 2464 .rpc_resp = &res,
1da177e4
LT		 2465 };
2466
0e574af1 2467 nfs_fattr_init(fsstat->fattr);
cccef3b9 2468 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2469}
2470
2471static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2472{
2473 struct nfs4_exception exception = { };
2474 int err;
2475 do {
2476 err = nfs4_handle_exception(server,
2477 _nfs4_proc_statfs(server, fhandle, fsstat),
2478 &exception);
2479 } while (exception.retry);
2480 return err;
2481}
2482
2483static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2484 struct nfs_fsinfo *fsinfo)
2485{
2486 struct nfs4_fsinfo_arg args = {
2487 .fh = fhandle,
2488 .bitmask = server->attr_bitmask,
2489 };
3dda5e43
BH		 2490 struct nfs4_fsinfo_res res = {
2491 .fsinfo = fsinfo,
2492 };
1da177e4
LT		 2493 struct rpc_message msg = {
2494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2495 .rpc_argp = &args,
3dda5e43 2496 .rpc_resp = &res,
1da177e4
LT		 2497 };
2498
cccef3b9 2499 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2500}
2501
2502static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2503{
2504 struct nfs4_exception exception = { };
2505 int err;
2506
2507 do {
2508 err = nfs4_handle_exception(server,
2509 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2510 &exception);
2511 } while (exception.retry);
2512 return err;
2513}
2514
2515static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2516{
0e574af1 2517 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2518 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2519}
2520
2521static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2522 struct nfs_pathconf *pathconf)
2523{
2524 struct nfs4_pathconf_arg args = {
2525 .fh = fhandle,
2526 .bitmask = server->attr_bitmask,
2527 };
d45b2989
BH		 2528 struct nfs4_pathconf_res res = {
2529 .pathconf = pathconf,
2530 };
1da177e4
LT		 2531 struct rpc_message msg = {
2532 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2533 .rpc_argp = &args,
d45b2989 2534 .rpc_resp = &res,
1da177e4
LT		 2535 };
2536
2537 /* None of the pathconf attributes are mandatory to implement */
2538 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2539 memset(pathconf, 0, sizeof(*pathconf));
2540 return 0;
2541 }
2542
0e574af1 2543 nfs_fattr_init(pathconf->fattr);
cccef3b9 2544 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2545}
2546
2547static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2548 struct nfs_pathconf *pathconf)
2549{
2550 struct nfs4_exception exception = { };
2551 int err;
2552
2553 do {
2554 err = nfs4_handle_exception(server,
2555 _nfs4_proc_pathconf(server, fhandle, pathconf),
2556 &exception);
2557 } while (exception.retry);
2558 return err;
2559}
2560
ec06c096 2561static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2562{
ec06c096 2563 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2564
9e33bed5 2565 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
1da177e4 2566 rpc_restart_call(task);
ec06c096 2567 return -EAGAIN;
1da177e4 2568 }
8850df99
TM		 2569
2570 nfs_invalidate_atime(data->inode);
1da177e4 2571 if (task->tk_status > 0)
ec06c096
TM		 2572 renew_lease(server, data->timestamp);
2573 return 0;
1da177e4
LT		 2574}
2575
bdc7f021 2576static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2577{
1da177e4 2578 data->timestamp = jiffies;
bdc7f021 2579 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2580}
2581
788e7a89 2582static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2583{
1da177e4
LT		 2584 struct inode *inode = data->inode;
2585
9e33bed5 2586 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
1da177e4 2587 rpc_restart_call(task);
788e7a89 2588 return -EAGAIN;
1da177e4 2589 }
4f9838c7 2590 if (task->tk_status >= 0) {
1da177e4 2591 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2592 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2593 }
788e7a89 2594 return 0;
1da177e4
LT		 2595}
2596
bdc7f021 2597static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2598{
bdc7f021
TM		 2599 struct nfs_server *server = NFS_SERVER(data->inode);
2600
a65318bf 2601 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2602 data->res.server = server;
1da177e4
LT		 2603 data->timestamp = jiffies;
2604
bdc7f021 2605 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2606}
2607
788e7a89 2608static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2609{
1da177e4
LT		 2610 struct inode *inode = data->inode;
2611
9e33bed5 2612 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
1da177e4 2613 rpc_restart_call(task);
788e7a89 2614 return -EAGAIN;
1da177e4 2615 }
9e08a3c5 2616 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2617 return 0;
1da177e4
LT		 2618}
2619
bdc7f021 2620static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2621{
788e7a89 2622 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2623
a65318bf 2624 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2625 data->res.server = server;
bdc7f021 2626 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2627}
2628
2629/*
2630 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2631 * standalone procedure for queueing an asynchronous RENEW.
2632 */
963d8fe5 2633static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2634{
adfa6f98 2635 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2636 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2637
2638 if (task->tk_status < 0) {
95baa25c
TM		 2639 /* Unless we're shutting down, schedule state recovery! */
2640 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
2641 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2642 return;
2643 }
2644 spin_lock(&clp->cl_lock);
2645 if (time_before(clp->cl_last_renewal,timestamp))
2646 clp->cl_last_renewal = timestamp;
2647 spin_unlock(&clp->cl_lock);
2648}
2649
963d8fe5
TM		 2650static const struct rpc_call_ops nfs4_renew_ops = {
2651 .rpc_call_done = nfs4_renew_done,
2652};
2653
adfa6f98 2654int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2655{
2656 struct rpc_message msg = {
2657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2658 .rpc_argp = clp,
b4454fe1 2659 .rpc_cred = cred,
1da177e4
LT		 2660 };
2661
2662 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2663 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2664}
2665
adfa6f98 2666int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2667{
2668 struct rpc_message msg = {
2669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2670 .rpc_argp = clp,
b4454fe1 2671 .rpc_cred = cred,
1da177e4
LT		 2672 };
2673 unsigned long now = jiffies;
2674 int status;
2675
2676 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2677 if (status < 0)
2678 return status;
2679 spin_lock(&clp->cl_lock);
2680 if (time_before(clp->cl_last_renewal,now))
2681 clp->cl_last_renewal = now;
2682 spin_unlock(&clp->cl_lock);
2683 return 0;
2684}
2685
aa1870af
BF		 2686static inline int nfs4_server_supports_acls(struct nfs_server *server)
2687{
2688 return (server->caps & NFS_CAP_ACLS)
2689 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2690 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2691}
2692
2693/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2694 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2695 * the stack.
2696 */
2697#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2698
2699static void buf_to_pages(const void *buf, size_t buflen,
2700 struct page **pages, unsigned int *pgbase)
2701{
2702 const void *p = buf;
2703
2704 *pgbase = offset_in_page(buf);
2705 p -= *pgbase;
2706 while (p < buf + buflen) {
2707 *(pages++) = virt_to_page(p);
2708 p += PAGE_CACHE_SIZE;
2709 }
2710}
2711
e50a1c2e
BF		 2712struct nfs4_cached_acl {
2713 int cached;
2714 size_t len;
3e9d4154 2715 char data[0];
e50a1c2e
BF		 2716};
2717
2718static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2719{
2720 struct nfs_inode *nfsi = NFS_I(inode);
2721
2722 spin_lock(&inode->i_lock);
2723 kfree(nfsi->nfs4_acl);
2724 nfsi->nfs4_acl = acl;
2725 spin_unlock(&inode->i_lock);
2726}
2727
2728static void nfs4_zap_acl_attr(struct inode *inode)
2729{
2730 nfs4_set_cached_acl(inode, NULL);
2731}
2732
2733static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2734{
2735 struct nfs_inode *nfsi = NFS_I(inode);
2736 struct nfs4_cached_acl *acl;
2737 int ret = -ENOENT;
2738
2739 spin_lock(&inode->i_lock);
2740 acl = nfsi->nfs4_acl;
2741 if (acl == NULL)
2742 goto out;
2743 if (buf == NULL) /* user is just asking for length */
2744 goto out_len;
2745 if (acl->cached == 0)
2746 goto out;
2747 ret = -ERANGE; /* see getxattr(2) man page */
2748 if (acl->len > buflen)
2749 goto out;
2750 memcpy(buf, acl->data, acl->len);
2751out_len:
2752 ret = acl->len;
2753out:
2754 spin_unlock(&inode->i_lock);
2755 return ret;
2756}
2757
2758static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2759{
2760 struct nfs4_cached_acl *acl;
2761
2762 if (buf && acl_len <= PAGE_SIZE) {
2763 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2764 if (acl == NULL)
2765 goto out;
2766 acl->cached = 1;
2767 memcpy(acl->data, buf, acl_len);
2768 } else {
2769 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2770 if (acl == NULL)
2771 goto out;
2772 acl->cached = 0;
2773 }
2774 acl->len = acl_len;
2775out:
2776 nfs4_set_cached_acl(inode, acl);
2777}
2778
16b4289c 2779static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2780{
aa1870af
BF		 2781 struct page *pages[NFS4ACL_MAXPAGES];
2782 struct nfs_getaclargs args = {
2783 .fh = NFS_FH(inode),
2784 .acl_pages = pages,
2785 .acl_len = buflen,
2786 };
663c79b3
BH		 2787 struct nfs_getaclres res = {
2788 .acl_len = buflen,
2789 };
e50a1c2e 2790 void *resp_buf;
aa1870af
BF		 2791 struct rpc_message msg = {
2792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2793 .rpc_argp = &args,
663c79b3 2794 .rpc_resp = &res,
aa1870af 2795 };
e50a1c2e 2796 struct page *localpage = NULL;
aa1870af
BF		 2797 int ret;
2798
e50a1c2e
BF		 2799 if (buflen < PAGE_SIZE) {
2800 /* As long as we're doing a round trip to the server anyway,
2801 * let's be prepared for a page of acl data. */
2802 localpage = alloc_page(GFP_KERNEL);
2803 resp_buf = page_address(localpage);
2804 if (localpage == NULL)
2805 return -ENOMEM;
2806 args.acl_pages[0] = localpage;
2807 args.acl_pgbase = 0;
663c79b3 2808 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2809 } else {
2810 resp_buf = buf;
2811 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2812 }
cccef3b9 2813 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 2814 if (ret)
2815 goto out_free;
663c79b3
BH		 2816 if (res.acl_len > args.acl_len)
2817 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 2818 else
663c79b3 2819 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 2820 if (buf) {
2821 ret = -ERANGE;
663c79b3 2822 if (res.acl_len > buflen)
e50a1c2e
BF		 2823 goto out_free;
2824 if (localpage)
663c79b3 2825 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 2826 }
663c79b3 2827 ret = res.acl_len;
e50a1c2e
BF		 2828out_free:
2829 if (localpage)
2830 __free_page(localpage);
aa1870af
BF		 2831 return ret;
2832}
2833
16b4289c
TM		 2834static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2835{
2836 struct nfs4_exception exception = { };
2837 ssize_t ret;
2838 do {
2839 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2840 if (ret >= 0)
2841 break;
2842 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2843 } while (exception.retry);
2844 return ret;
2845}
2846
e50a1c2e
BF		 2847static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2848{
2849 struct nfs_server *server = NFS_SERVER(inode);
2850 int ret;
2851
2852 if (!nfs4_server_supports_acls(server))
2853 return -EOPNOTSUPP;
2854 ret = nfs_revalidate_inode(server, inode);
2855 if (ret < 0)
2856 return ret;
f41f7418
TM		 2857 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2858 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 2859 ret = nfs4_read_cached_acl(inode, buf, buflen);
2860 if (ret != -ENOENT)
2861 return ret;
2862 return nfs4_get_acl_uncached(inode, buf, buflen);
2863}
2864
16b4289c 2865static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2866{
2867 struct nfs_server *server = NFS_SERVER(inode);
2868 struct page *pages[NFS4ACL_MAXPAGES];
2869 struct nfs_setaclargs arg = {
2870 .fh = NFS_FH(inode),
2871 .acl_pages = pages,
2872 .acl_len = buflen,
2873 };
73c403a9 2874 struct nfs_setaclres res;
4b580ee3
BF		 2875 struct rpc_message msg = {
2876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2877 .rpc_argp = &arg,
73c403a9 2878 .rpc_resp = &res,
4b580ee3
BF		 2879 };
2880 int ret;
2881
2882 if (!nfs4_server_supports_acls(server))
2883 return -EOPNOTSUPP;
642ac549 2884 nfs_inode_return_delegation(inode);
4b580ee3 2885 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 2886 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 2887 nfs_access_zap_cache(inode);
2888 nfs_zap_acl_cache(inode);
4b580ee3
BF		 2889 return ret;
2890}
2891
16b4289c
TM		 2892static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2893{
2894 struct nfs4_exception exception = { };
2895 int err;
2896 do {
2897 err = nfs4_handle_exception(NFS_SERVER(inode),
2898 __nfs4_proc_set_acl(inode, buf, buflen),
2899 &exception);
2900 } while (exception.retry);
2901 return err;
2902}
2903
1da177e4 2904static int
9e33bed5 2905nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 2906{
7539bbab 2907 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2908
2909 if (!clp || task->tk_status >= 0)
2910 return 0;
2911 switch(task->tk_status) {
9e33bed5
TM		 2912 case -NFS4ERR_ADMIN_REVOKED:
2913 case -NFS4ERR_BAD_STATEID:
2914 case -NFS4ERR_OPENMODE:
2915 if (state == NULL)
2916 break;
2917 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 2918 case -NFS4ERR_STALE_CLIENTID:
2919 case -NFS4ERR_STALE_STATEID:
2920 case -NFS4ERR_EXPIRED:
5d00837b 2921 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 2922 nfs4_schedule_state_recovery(clp);
e005e804 2923 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 2924 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 2925 task->tk_status = 0;
2926 return -EAGAIN;
1da177e4 2927 case -NFS4ERR_DELAY:
2e96d286 2928 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 2929 case -NFS4ERR_GRACE:
1da177e4
LT		 2930 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2931 task->tk_status = 0;
2932 return -EAGAIN;
2933 case -NFS4ERR_OLD_STATEID:
2934 task->tk_status = 0;
2935 return -EAGAIN;
2936 }
2937 task->tk_status = nfs4_map_errors(task->tk_status);
2938 return 0;
2939}
2940
adfa6f98 2941int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2942{
2943 nfs4_verifier sc_verifier;
2944 struct nfs4_setclientid setclientid = {
2945 .sc_verifier = &sc_verifier,
2946 .sc_prog = program,
2947 };
2948 struct rpc_message msg = {
2949 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2950 .rpc_argp = &setclientid,
2951 .rpc_resp = clp,
286d7d6a 2952 .rpc_cred = cred,
1da177e4 2953 };
bc4785cd 2954 __be32 *p;
1da177e4
LT		 2955 int loop = 0;
2956 int status;
2957
bc4785cd 2958 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2959 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2960 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2961
2962 for(;;) {
2963 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 2964 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 2965 clp->cl_ipaddr,
2966 rpc_peeraddr2str(clp->cl_rpcclient,
2967 RPC_DISPLAY_ADDR),
69dd716c
TM		 2968 rpc_peeraddr2str(clp->cl_rpcclient,
2969 RPC_DISPLAY_PROTO),
78ea323b 2970 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 2971 clp->cl_id_uniquifier);
2972 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 2973 sizeof(setclientid.sc_netid),
2974 rpc_peeraddr2str(clp->cl_rpcclient,
2975 RPC_DISPLAY_NETID));
1da177e4 2976 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 2977 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 2978 clp->cl_ipaddr, port >> 8, port & 255);
2979
2980 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2981 if (status != -NFS4ERR_CLID_INUSE)
2982 break;
2983 if (signalled())
2984 break;
2985 if (loop++ & 1)
2986 ssleep(clp->cl_lease_time + 1);
2987 else
2988 if (++clp->cl_id_uniquifier == 0)
2989 break;
2990 }
2991 return status;
2992}
2993
adfa6f98 2994static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2995{
2996 struct nfs_fsinfo fsinfo;
2997 struct rpc_message msg = {
2998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2999 .rpc_argp = clp,
3000 .rpc_resp = &fsinfo,
286d7d6a 3001 .rpc_cred = cred,
1da177e4
LT		 3002 };
3003 unsigned long now;
3004 int status;
3005
3006 now = jiffies;
3007 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3008 if (status == 0) {
3009 spin_lock(&clp->cl_lock);
3010 clp->cl_lease_time = fsinfo.lease_time * HZ;
3011 clp->cl_last_renewal = now;
3012 spin_unlock(&clp->cl_lock);
3013 }
3014 return status;
3015}
3016
adfa6f98 3017int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3018{
77e03677 3019 long timeout = 0;
51581f3b
TM		 3020 int err;
3021 do {
3022 err = _nfs4_proc_setclientid_confirm(clp, cred);
3023 switch (err) {
3024 case 0:
3025 return err;
3026 case -NFS4ERR_RESOURCE:
3027 /* The IBM lawyers misread another document! */
3028 case -NFS4ERR_DELAY:
3029 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3030 }
3031 } while (err == 0);
3032 return err;
3033}
3034
fe650407
TM		 3035struct nfs4_delegreturndata {
3036 struct nfs4_delegreturnargs args;
fa178f29 3037 struct nfs4_delegreturnres res;
fe650407
TM		 3038 struct nfs_fh fh;
3039 nfs4_stateid stateid;
26e976a8 3040 unsigned long timestamp;
fa178f29 3041 struct nfs_fattr fattr;
fe650407
TM		 3042 int rpc_status;
3043};
3044
fe650407
TM		 3045static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3046{
3047 struct nfs4_delegreturndata *data = calldata;
3048 data->rpc_status = task->tk_status;
26e976a8 3049 if (data->rpc_status == 0)
fa178f29 3050 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3051}
3052
3053static void nfs4_delegreturn_release(void *calldata)
3054{
fe650407
TM		 3055 kfree(calldata);
3056}
3057
c8d149f3 3058static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3059 .rpc_call_done = nfs4_delegreturn_done,
3060 .rpc_release = nfs4_delegreturn_release,
3061};
3062
e6f81075 3063static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3064{
3065 struct nfs4_delegreturndata *data;
fa178f29 3066 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3067 struct rpc_task *task;
5138fde0
TM		 3068 struct rpc_message msg = {
3069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3070 .rpc_cred = cred,
3071 };
c970aa85
TM		 3072 struct rpc_task_setup task_setup_data = {
3073 .rpc_client = server->client,
5138fde0 3074 .rpc_message = &msg,
c970aa85
TM		 3075 .callback_ops = &nfs4_delegreturn_ops,
3076 .flags = RPC_TASK_ASYNC,
3077 };
e6f81075 3078 int status = 0;
fe650407
TM		 3079
3080 data = kmalloc(sizeof(*data), GFP_KERNEL);
3081 if (data == NULL)
3082 return -ENOMEM;
3083 data->args.fhandle = &data->fh;
3084 data->args.stateid = &data->stateid;
fa178f29 3085 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3086 nfs_copy_fh(&data->fh, NFS_FH(inode));
3087 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3088 data->res.fattr = &data->fattr;
3089 data->res.server = server;
5138fde0 3090 nfs_fattr_init(data->res.fattr);
26e976a8 3091 data->timestamp = jiffies;
fe650407
TM		 3092 data->rpc_status = 0;
3093
c970aa85 3094 task_setup_data.callback_data = data;
5138fde0
TM		 3095 msg.rpc_argp = &data->args,
3096 msg.rpc_resp = &data->res,
c970aa85 3097 task = rpc_run_task(&task_setup_data);
7a1218a2 3098 if (IS_ERR(task))
fe650407 3099 return PTR_ERR(task);
e6f81075
TM		 3100 if (!issync)
3101 goto out;
fe650407 3102 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3103 if (status != 0)
3104 goto out;
3105 status = data->rpc_status;
3106 if (status != 0)
3107 goto out;
3108 nfs_refresh_inode(inode, &data->fattr);
3109out:
e6b3c4db 3110 rpc_put_task(task);
fe650407 3111 return status;
1da177e4
LT		 3112}
3113
e6f81075 3114int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3115{
3116 struct nfs_server *server = NFS_SERVER(inode);
3117 struct nfs4_exception exception = { };
3118 int err;
3119 do {
e6f81075 3120 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3121 switch (err) {
3122 case -NFS4ERR_STALE_STATEID:
3123 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3124 case 0:
3125 return 0;
3126 }
3127 err = nfs4_handle_exception(server, err, &exception);
3128 } while (exception.retry);
3129 return err;
3130}
3131
3132#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3133#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3134
3135/*
3136 * sleep, with exponential backoff, and retry the LOCK operation.
3137 */
3138static unsigned long
3139nfs4_set_lock_task_retry(unsigned long timeout)
3140{
150030b7 3141 schedule_timeout_killable(timeout);
1da177e4
LT		 3142 timeout <<= 1;
3143 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3144 return NFS4_LOCK_MAXTIMEOUT;
3145 return timeout;
3146}
3147
1da177e4
LT		 3148static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3149{
3150 struct inode *inode = state->inode;
3151 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3152 struct nfs_client *clp = server->nfs_client;
911d1aaf 3153 struct nfs_lockt_args arg = {
1da177e4 3154 .fh = NFS_FH(inode),
911d1aaf 3155 .fl = request,
1da177e4 3156 };
911d1aaf
TM		 3157 struct nfs_lockt_res res = {
3158 .denied = request,
1da177e4
LT		 3159 };
3160 struct rpc_message msg = {
3161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3162 .rpc_argp = &arg,
3163 .rpc_resp = &res,
3164 .rpc_cred = state->owner->so_cred,
3165 };
1da177e4
LT		 3166 struct nfs4_lock_state *lsp;
3167 int status;
3168
911d1aaf 3169 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3170 status = nfs4_set_lock_state(state, request);
3171 if (status != 0)
3172 goto out;
3173 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3174 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3175 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3176 switch (status) {
3177 case 0:
3178 request->fl_type = F_UNLCK;
3179 break;
3180 case -NFS4ERR_DENIED:
3181 status = 0;
1da177e4 3182 }
70cc6487 3183 request->fl_ops->fl_release_private(request);
8d0a8a9d 3184out:
1da177e4
LT		 3185 return status;
3186}
3187
3188static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3189{
3190 struct nfs4_exception exception = { };
3191 int err;
3192
3193 do {
3194 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3195 _nfs4_proc_getlk(state, cmd, request),
3196 &exception);
3197 } while (exception.retry);
3198 return err;
3199}
3200
3201static int do_vfs_lock(struct file *file, struct file_lock *fl)
3202{
3203 int res = 0;
3204 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3205 case FL_POSIX:
3206 res = posix_lock_file_wait(file, fl);
3207 break;
3208 case FL_FLOCK:
3209 res = flock_lock_file_wait(file, fl);
3210 break;
3211 default:
3212 BUG();
3213 }
1da177e4
LT		 3214 return res;
3215}
3216
faf5f49c 3217struct nfs4_unlockdata {
911d1aaf
TM		 3218 struct nfs_locku_args arg;
3219 struct nfs_locku_res res;
faf5f49c
TM		 3220 struct nfs4_lock_state *lsp;
3221 struct nfs_open_context *ctx;
911d1aaf
TM		 3222 struct file_lock fl;
3223 const struct nfs_server *server;
26e976a8 3224 unsigned long timestamp;
faf5f49c
TM		 3225};
3226
911d1aaf
TM		 3227static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3228 struct nfs_open_context *ctx,
3229 struct nfs4_lock_state *lsp,
3230 struct nfs_seqid *seqid)
3231{
3232 struct nfs4_unlockdata *p;
3233 struct inode *inode = lsp->ls_state->inode;
3234
3235 p = kmalloc(sizeof(*p), GFP_KERNEL);
3236 if (p == NULL)
3237 return NULL;
3238 p->arg.fh = NFS_FH(inode);
3239 p->arg.fl = &p->fl;
3240 p->arg.seqid = seqid;
c1d51931 3241 p->res.seqid = seqid;
911d1aaf
TM		 3242 p->arg.stateid = &lsp->ls_stateid;
3243 p->lsp = lsp;
3244 atomic_inc(&lsp->ls_count);
3245 /* Ensure we don't close file until we're done freeing locks! */
3246 p->ctx = get_nfs_open_context(ctx);
3247 memcpy(&p->fl, fl, sizeof(p->fl));
3248 p->server = NFS_SERVER(inode);
3249 return p;
3250}
3251
06f814a3 3252static void nfs4_locku_release_calldata(void *data)
faf5f49c 3253{
963d8fe5 3254 struct nfs4_unlockdata *calldata = data;
911d1aaf 3255 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3256 nfs4_put_lock_state(calldata->lsp);
3257 put_nfs_open_context(calldata->ctx);
3258 kfree(calldata);
faf5f49c
TM		 3259}
3260
963d8fe5 3261static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3262{
963d8fe5 3263 struct nfs4_unlockdata *calldata = data;
faf5f49c 3264
06f814a3
TM		 3265 if (RPC_ASSASSINATED(task))
3266 return;
faf5f49c
TM		 3267 switch (task->tk_status) {
3268 case 0:
3269 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3270 calldata->res.stateid.data,
faf5f49c 3271 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3272 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3273 break;
9e33bed5
TM		 3274 case -NFS4ERR_BAD_STATEID:
3275 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3276 case -NFS4ERR_STALE_STATEID:
3277 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3278 break;
3279 default:
9e33bed5 3280 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
faf5f49c 3281 rpc_restart_call(task);
faf5f49c 3282 }
faf5f49c
TM		 3283}
3284
4ce70ada 3285static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3286{
4ce70ada 3287 struct nfs4_unlockdata *calldata = data;
faf5f49c 3288
911d1aaf 3289 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3290 return;
3291 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3292 /* Note: exit _without_ running nfs4_locku_done */
3293 task->tk_action = NULL;
faf5f49c
TM		 3294 return;
3295 }
26e976a8 3296 calldata->timestamp = jiffies;
5138fde0 3297 rpc_call_start(task);
faf5f49c
TM		 3298}
3299
963d8fe5 3300static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3301 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3302 .rpc_call_done = nfs4_locku_done,
06f814a3 3303 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3304};
3305
a5d16a4d
TM		 3306static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3307 struct nfs_open_context *ctx,
3308 struct nfs4_lock_state *lsp,
3309 struct nfs_seqid *seqid)
3310{
3311 struct nfs4_unlockdata *data;
5138fde0
TM		 3312 struct rpc_message msg = {
3313 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3314 .rpc_cred = ctx->cred,
3315 };
c970aa85
TM		 3316 struct rpc_task_setup task_setup_data = {
3317 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3318 .rpc_message = &msg,
c970aa85 3319 .callback_ops = &nfs4_locku_ops,
101070ca 3320 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3321 .flags = RPC_TASK_ASYNC,
3322 };
a5d16a4d 3323
137d6aca
FF		 3324 /* Ensure this is an unlock - when canceling a lock, the
3325 * canceled lock is passed in, and it won't be an unlock.
3326 */
3327 fl->fl_type = F_UNLCK;
3328
a5d16a4d
TM		 3329 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3330 if (data == NULL) {
3331 nfs_free_seqid(seqid);
3332 return ERR_PTR(-ENOMEM);
3333 }
3334
5138fde0
TM		 3335 msg.rpc_argp = &data->arg,
3336 msg.rpc_resp = &data->res,
c970aa85
TM		 3337 task_setup_data.callback_data = data;
3338 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3339}
3340
faf5f49c
TM		 3341static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3342{
19e03c57 3343 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3344 struct nfs_seqid *seqid;
1da177e4 3345 struct nfs4_lock_state *lsp;
06f814a3
TM		 3346 struct rpc_task *task;
3347 int status = 0;
536ff0f8 3348 unsigned char fl_flags = request->fl_flags;
faf5f49c 3349
8d0a8a9d 3350 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3351 /* Unlock _before_ we do the RPC call */
3352 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3353 down_read(&nfsi->rwsem);
3354 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3355 up_read(&nfsi->rwsem);
9b073574 3356 goto out;
19e03c57
TM		 3357 }
3358 up_read(&nfsi->rwsem);
8d0a8a9d 3359 if (status != 0)
9b073574
TM		 3360 goto out;
3361 /* Is this a delegated lock? */
3362 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3363 goto out;
8d0a8a9d 3364 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3365 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3366 status = -ENOMEM;
911d1aaf 3367 if (seqid == NULL)
9b073574 3368 goto out;
cd3758e3 3369 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3370 status = PTR_ERR(task);
3371 if (IS_ERR(task))
9b073574 3372 goto out;
a5d16a4d 3373 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3374 rpc_put_task(task);
9b073574 3375out:
536ff0f8 3376 request->fl_flags = fl_flags;
1da177e4
LT		 3377 return status;
3378}
3379
a5d16a4d
TM		 3380struct nfs4_lockdata {
3381 struct nfs_lock_args arg;
3382 struct nfs_lock_res res;
3383 struct nfs4_lock_state *lsp;
3384 struct nfs_open_context *ctx;
3385 struct file_lock fl;
26e976a8 3386 unsigned long timestamp;
a5d16a4d
TM		 3387 int rpc_status;
3388 int cancelled;
3389};
3390
3391static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3392 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3393{
a5d16a4d
TM		 3394 struct nfs4_lockdata *p;
3395 struct inode *inode = lsp->ls_state->inode;
1da177e4 3396 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3397
3398 p = kzalloc(sizeof(*p), GFP_KERNEL);
3399 if (p == NULL)
3400 return NULL;
3401
3402 p->arg.fh = NFS_FH(inode);
3403 p->arg.fl = &p->fl;
2f74c0a0
TM		 3404 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3405 if (p->arg.open_seqid == NULL)
3406 goto out_free;
a5d16a4d
TM		 3407 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3408 if (p->arg.lock_seqid == NULL)
2f74c0a0 3409 goto out_free_seqid;
a5d16a4d 3410 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3411 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3412 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3413 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d
TM		 3414 p->lsp = lsp;
3415 atomic_inc(&lsp->ls_count);
3416 p->ctx = get_nfs_open_context(ctx);
3417 memcpy(&p->fl, fl, sizeof(p->fl));
3418 return p;
2f74c0a0
TM		 3419out_free_seqid:
3420 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3421out_free:
3422 kfree(p);
3423 return NULL;
3424}
3425
3426static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3427{
3428 struct nfs4_lockdata *data = calldata;
3429 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3430
3110ff80 3431 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3432 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3433 return;
a5d16a4d
TM		 3434 /* Do we need to do an open_to_lock_owner? */
3435 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3436 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3437 return;
a5d16a4d
TM		 3438 data->arg.open_stateid = &state->stateid;
3439 data->arg.new_lock_owner = 1;
c1d51931 3440 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3441 } else
3442 data->arg.new_lock_owner = 0;
26e976a8 3443 data->timestamp = jiffies;
5138fde0 3444 rpc_call_start(task);
3110ff80 3445 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3446}
3447
3448static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3449{
3450 struct nfs4_lockdata *data = calldata;
3451
3110ff80 3452 dprintk("%s: begin!\n", __func__);
a5d16a4d
TM		 3453
3454 data->rpc_status = task->tk_status;
3455 if (RPC_ASSASSINATED(task))
3456 goto out;
3457 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3458 if (data->rpc_status == 0)
3459 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3460 else
3461 goto out;
3462 }
3463 if (data->rpc_status == 0) {
3464 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3465 sizeof(data->lsp->ls_stateid.data));
3466 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3467 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3468 }
a5d16a4d 3469out:
3110ff80 3470 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3471}
3472
3473static void nfs4_lock_release(void *calldata)
3474{
3475 struct nfs4_lockdata *data = calldata;
3476
3110ff80 3477 dprintk("%s: begin!\n", __func__);
2f74c0a0 3478 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3479 if (data->cancelled != 0) {
3480 struct rpc_task *task;
3481 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3482 data->arg.lock_seqid);
3483 if (!IS_ERR(task))
e6b3c4db 3484 rpc_put_task(task);
3110ff80 3485 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3486 } else
3487 nfs_free_seqid(data->arg.lock_seqid);
3488 nfs4_put_lock_state(data->lsp);
3489 put_nfs_open_context(data->ctx);
3490 kfree(data);
3110ff80 3491 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3492}
3493
3494static const struct rpc_call_ops nfs4_lock_ops = {
3495 .rpc_call_prepare = nfs4_lock_prepare,
3496 .rpc_call_done = nfs4_lock_done,
3497 .rpc_release = nfs4_lock_release,
3498};
3499
3500static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3501{
3502 struct nfs4_lockdata *data;
3503 struct rpc_task *task;
5138fde0
TM		 3504 struct rpc_message msg = {
3505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3506 .rpc_cred = state->owner->so_cred,
3507 };
c970aa85
TM		 3508 struct rpc_task_setup task_setup_data = {
3509 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3510 .rpc_message = &msg,
c970aa85 3511 .callback_ops = &nfs4_lock_ops,
101070ca 3512 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3513 .flags = RPC_TASK_ASYNC,
3514 };
a5d16a4d
TM		 3515 int ret;
3516
3110ff80 3517 dprintk("%s: begin!\n", __func__);
cd3758e3 3518 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3519 fl->fl_u.nfs4_fl.owner);
3520 if (data == NULL)
3521 return -ENOMEM;
3522 if (IS_SETLKW(cmd))
3523 data->arg.block = 1;
3524 if (reclaim != 0)
3525 data->arg.reclaim = 1;
5138fde0
TM		 3526 msg.rpc_argp = &data->arg,
3527 msg.rpc_resp = &data->res,
c970aa85
TM		 3528 task_setup_data.callback_data = data;
3529 task = rpc_run_task(&task_setup_data);
7a1218a2 3530 if (IS_ERR(task))
a5d16a4d 3531 return PTR_ERR(task);
a5d16a4d
TM		 3532 ret = nfs4_wait_for_completion_rpc_task(task);
3533 if (ret == 0) {
3534 ret = data->rpc_status;
3535 if (ret == -NFS4ERR_DENIED)
3536 ret = -EAGAIN;
3537 } else
3538 data->cancelled = 1;
e6b3c4db 3539 rpc_put_task(task);
3110ff80 3540 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3541 return ret;
1da177e4
LT		 3542}
3543
3544static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3545{
202b50dc
TM		 3546 struct nfs_server *server = NFS_SERVER(state->inode);
3547 struct nfs4_exception exception = { };
3548 int err;
3549
3550 do {
42a2d13e
TM		 3551 /* Cache the lock if possible... */
3552 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3553 return 0;
202b50dc
TM		 3554 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3555 if (err != -NFS4ERR_DELAY)
3556 break;
3557 nfs4_handle_exception(server, err, &exception);
3558 } while (exception.retry);
3559 return err;
1da177e4
LT		 3560}
3561
3562static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3563{
202b50dc
TM		 3564 struct nfs_server *server = NFS_SERVER(state->inode);
3565 struct nfs4_exception exception = { };
3566 int err;
3567
6bfc93ef
TM		 3568 err = nfs4_set_lock_state(state, request);
3569 if (err != 0)
3570 return err;
202b50dc 3571 do {
42a2d13e
TM		 3572 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3573 return 0;
202b50dc
TM		 3574 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3575 if (err != -NFS4ERR_DELAY)
3576 break;
3577 nfs4_handle_exception(server, err, &exception);
3578 } while (exception.retry);
3579 return err;
1da177e4
LT		 3580}
3581
3582static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3583{
19e03c57 3584 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 3585 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3586 int status;
3587
6bfc93ef 3588 /* Is this a delegated open? */
6bfc93ef
TM		 3589 status = nfs4_set_lock_state(state, request);
3590 if (status != 0)
3591 goto out;
01c3b861
TM		 3592 request->fl_flags |= FL_ACCESS;
3593 status = do_vfs_lock(request->fl_file, request);
3594 if (status < 0)
3595 goto out;
19e03c57 3596 down_read(&nfsi->rwsem);
01c3b861 3597 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 3598 /* Yes: cache locks! */
01c3b861 3599 /* ...but avoid races with delegation recall... */
19e03c57
TM		 3600 request->fl_flags = fl_flags & ~FL_SLEEP;
3601 status = do_vfs_lock(request->fl_file, request);
3602 goto out_unlock;
01c3b861 3603 }
6bfc93ef
TM		 3604 status = _nfs4_do_setlk(state, cmd, request, 0);
3605 if (status != 0)
01c3b861 3606 goto out_unlock;
6bfc93ef 3607 /* Note: we always want to sleep here! */
01c3b861 3608 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 3609 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 3610 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 3611out_unlock:
19e03c57 3612 up_read(&nfsi->rwsem);
01c3b861
TM		 3613out:
3614 request->fl_flags = fl_flags;
1da177e4
LT		 3615 return status;
3616}
3617
3618static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3619{
3620 struct nfs4_exception exception = { };
3621 int err;
3622
3623 do {
3624 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3625 _nfs4_proc_setlk(state, cmd, request),
3626 &exception);
3627 } while (exception.retry);
3628 return err;
3629}
3630
3631static int
3632nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3633{
3634 struct nfs_open_context *ctx;
3635 struct nfs4_state *state;
3636 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3637 int status;
3638
3639 /* verify open state */
cd3758e3 3640 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3641 state = ctx->state;
3642
3643 if (request->fl_start < 0 || request->fl_end < 0)
3644 return -EINVAL;
3645
3646 if (IS_GETLK(cmd))
3647 return nfs4_proc_getlk(state, F_GETLK, request);
3648
3649 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3650 return -EINVAL;
3651
3652 if (request->fl_type == F_UNLCK)
3653 return nfs4_proc_unlck(state, cmd, request);
3654
3655 do {
3656 status = nfs4_proc_setlk(state, cmd, request);
3657 if ((status != -EAGAIN) || IS_SETLK(cmd))
3658 break;
3659 timeout = nfs4_set_lock_task_retry(timeout);
3660 status = -ERESTARTSYS;
3661 if (signalled())
3662 break;
3663 } while(status < 0);
1da177e4
LT		 3664 return status;
3665}
3666
888e694c
TM		 3667int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3668{
3669 struct nfs_server *server = NFS_SERVER(state->inode);
3670 struct nfs4_exception exception = { };
3671 int err;
3672
3673 err = nfs4_set_lock_state(state, fl);
3674 if (err != 0)
3675 goto out;
3676 do {
3677 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3678 if (err != -NFS4ERR_DELAY)
3679 break;
3680 err = nfs4_handle_exception(server, err, &exception);
3681 } while (exception.retry);
3682out:
3683 return err;
3684}
6b3b5496 3685
aa1870af
BF		 3686#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3687
6b3b5496
BF		 3688int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3689 size_t buflen, int flags)
3690{
4b580ee3
BF		 3691 struct inode *inode = dentry->d_inode;
3692
3693 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3694 return -EOPNOTSUPP;
3695
4b580ee3 3696 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3697}
3698
3699/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3700 * and that's what we'll do for e.g. user attributes that haven't been set.
3701 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3702 * attributes in kernel-managed attribute namespaces. */
3703ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3704 size_t buflen)
3705{
aa1870af
BF		 3706 struct inode *inode = dentry->d_inode;
3707
3708 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3709 return -EOPNOTSUPP;
3710
3711 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3712}
3713
3714ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3715{
aa1870af 3716 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3717
096455a2
BF		 3718 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3719 return 0;
6b3b5496
BF		 3720 if (buf && buflen < len)
3721 return -ERANGE;
3722 if (buf)
aa1870af
BF		 3723 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3724 return len;
6b3b5496
BF		 3725}
3726
69aaaae1
TM		 3727static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
3728{
3729 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
3730 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
3731 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
3732 return;
3733
3734 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3735 NFS_ATTR_FATTR_NLINK;
3736 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3737 fattr->nlink = 2;
3738}
3739
56659e99 3740int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3741 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3742{
3743 struct nfs_server *server = NFS_SERVER(dir);
3744 u32 bitmask[2] = {
361e624f
MN		 3745 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3746 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3747 };
3748 struct nfs4_fs_locations_arg args = {
3749 .dir_fh = NFS_FH(dir),
c228fd3a 3750 .name = name,
683b57b4
TM		 3751 .page = page,
3752 .bitmask = bitmask,
3753 };
22958463
BH		 3754 struct nfs4_fs_locations_res res = {
3755 .fs_locations = fs_locations,
3756 };
683b57b4
TM		 3757 struct rpc_message msg = {
3758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3759 .rpc_argp = &args,
22958463 3760 .rpc_resp = &res,
683b57b4
TM		 3761 };
3762 int status;
3763
3110ff80 3764 dprintk("%s: start\n", __func__);
c228fd3a 3765 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3766 fs_locations->server = server;
830b8e33 3767 fs_locations->nlocations = 0;
cccef3b9 3768 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 3769 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 3770 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 3771 return status;
3772}
3773
557134a3
AA		 3774#ifdef CONFIG_NFS_V4_1
3775/* Destroy the slot table */
3776static void nfs4_destroy_slot_table(struct nfs4_session *session)
3777{
3778 if (session->fc_slot_table.slots == NULL)
3779 return;
3780 kfree(session->fc_slot_table.slots);
3781 session->fc_slot_table.slots = NULL;
3782 return;
3783}
3784
3785struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
3786{
3787 struct nfs4_session *session;
3788 struct nfs4_slot_table *tbl;
3789
3790 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
3791 if (!session)
3792 return NULL;
3793 tbl = &session->fc_slot_table;
3794 spin_lock_init(&tbl->slot_tbl_lock);
3795 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table");
3796 session->clp = clp;
3797 return session;
3798}
3799
3800void nfs4_destroy_session(struct nfs4_session *session)
3801{
3802 nfs4_destroy_slot_table(session);
3803 kfree(session);
3804}
3805
3806#endif /* CONFIG_NFS_V4_1 */
3807
1da177e4 3808struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
7eff03ae 3809 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 3810 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 3811 .recover_open = nfs4_open_reclaim,
3812 .recover_lock = nfs4_lock_reclaim,
3813};
3814
b79a4a1b 3815struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
7eff03ae 3816 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 3817 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 3818 .recover_open = nfs4_open_expired,
3819 .recover_lock = nfs4_lock_expired,
3820};
3821
92e1d5be 3822static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3823 .permission = nfs_permission,
3824 .getattr = nfs_getattr,
3825 .setattr = nfs_setattr,
3826 .getxattr = nfs4_getxattr,
3827 .setxattr = nfs4_setxattr,
3828 .listxattr = nfs4_listxattr,
3829};
3830
509de811 3831const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3832 .version = 4, /* protocol version */
3833 .dentry_ops = &nfs4_dentry_operations,
3834 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3835 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3836 .getroot = nfs4_proc_get_root,
3837 .getattr = nfs4_proc_getattr,
3838 .setattr = nfs4_proc_setattr,
2b3de441 3839 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3840 .lookup = nfs4_proc_lookup,
3841 .access = nfs4_proc_access,
3842 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3843 .create = nfs4_proc_create,
3844 .remove = nfs4_proc_remove,
3845 .unlink_setup = nfs4_proc_unlink_setup,
3846 .unlink_done = nfs4_proc_unlink_done,
3847 .rename = nfs4_proc_rename,
3848 .link = nfs4_proc_link,
3849 .symlink = nfs4_proc_symlink,
3850 .mkdir = nfs4_proc_mkdir,
3851 .rmdir = nfs4_proc_remove,
3852 .readdir = nfs4_proc_readdir,
3853 .mknod = nfs4_proc_mknod,
3854 .statfs = nfs4_proc_statfs,
3855 .fsinfo = nfs4_proc_fsinfo,
3856 .pathconf = nfs4_proc_pathconf,
e9326dca 3857 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3858 .decode_dirent = nfs4_decode_dirent,
3859 .read_setup = nfs4_proc_read_setup,
ec06c096 3860 .read_done = nfs4_read_done,
1da177e4 3861 .write_setup = nfs4_proc_write_setup,
788e7a89 3862 .write_done = nfs4_write_done,
1da177e4 3863 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3864 .commit_done = nfs4_commit_done,
1da177e4 3865 .lock = nfs4_proc_lock,
e50a1c2e 3866 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 3867 .close_context = nfs4_close_context,
1da177e4
LT		 3868};
3869
3870/*
3871 * Local variables:
3872 * c-basic-offset: 8
3873 * End:
3874 */
Clone of davem's net-next-2.6 tree