projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFS: Fix use of cancel_delayed_work_sync in nfs_release_automount_timer
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
006ea73e 54#include "iostat.h"
1da177e4
LT		 55
56#define NFSDBG_FACILITY NFSDBG_PROC
57
2066fe89 58#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 59#define NFS4_POLL_RETRY_MAX (15*HZ)
60
cdd4e68b 61struct nfs4_opendata;
864472e9 62static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 63static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
faf5f49c 64static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
1da177e4 65static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
faf5f49c 66static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
adfa6f98 67static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
aac00a8d 68static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags);
9936781d
TM		 69static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 71
1da177e4
LT		 72/* Prevent leaks of NFSv4 errors into userland */
73int nfs4_map_errors(int err)
74{
75 if (err < -1000) {
76 dprintk("%s could not handle NFSv4 error %d\n",
77 __FUNCTION__, -err);
78 return -EIO;
79 }
80 return err;
81}
82
83/*
84 * This is our standard bitmap for GETATTR requests.
85 */
86const u32 nfs4_fattr_bitmap[2] = {
87 FATTR4_WORD0_TYPE
88 | FATTR4_WORD0_CHANGE
89 | FATTR4_WORD0_SIZE
90 | FATTR4_WORD0_FSID
91 | FATTR4_WORD0_FILEID,
92 FATTR4_WORD1_MODE
93 | FATTR4_WORD1_NUMLINKS
94 | FATTR4_WORD1_OWNER
95 | FATTR4_WORD1_OWNER_GROUP
96 | FATTR4_WORD1_RAWDEV
97 | FATTR4_WORD1_SPACE_USED
98 | FATTR4_WORD1_TIME_ACCESS
99 | FATTR4_WORD1_TIME_METADATA
100 | FATTR4_WORD1_TIME_MODIFY
101};
102
103const u32 nfs4_statfs_bitmap[2] = {
104 FATTR4_WORD0_FILES_AVAIL
105 | FATTR4_WORD0_FILES_FREE
106 | FATTR4_WORD0_FILES_TOTAL,
107 FATTR4_WORD1_SPACE_AVAIL
108 | FATTR4_WORD1_SPACE_FREE
109 | FATTR4_WORD1_SPACE_TOTAL
110};
111
4ce79717 112const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 113 FATTR4_WORD0_MAXLINK
114 | FATTR4_WORD0_MAXNAME,
115 0
116};
117
118const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
119 | FATTR4_WORD0_MAXREAD
120 | FATTR4_WORD0_MAXWRITE
121 | FATTR4_WORD0_LEASE_TIME,
122 0
123};
124
830b8e33
MN		 125const u32 nfs4_fs_locations_bitmap[2] = {
126 FATTR4_WORD0_TYPE
127 | FATTR4_WORD0_CHANGE
128 | FATTR4_WORD0_SIZE
129 | FATTR4_WORD0_FSID
130 | FATTR4_WORD0_FILEID
131 | FATTR4_WORD0_FS_LOCATIONS,
132 FATTR4_WORD1_MODE
133 | FATTR4_WORD1_NUMLINKS
134 | FATTR4_WORD1_OWNER
135 | FATTR4_WORD1_OWNER_GROUP
136 | FATTR4_WORD1_RAWDEV
137 | FATTR4_WORD1_SPACE_USED
138 | FATTR4_WORD1_TIME_ACCESS
139 | FATTR4_WORD1_TIME_METADATA
140 | FATTR4_WORD1_TIME_MODIFY
141 | FATTR4_WORD1_MOUNTED_ON_FILEID
142};
143
bc4785cd 144static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 145 struct nfs4_readdir_arg *readdir)
146{
0dbb4c67 147 __be32 *start, *p;
1da177e4
LT		 148
149 BUG_ON(readdir->count < 80);
150 if (cookie > 2) {
b7ef1956 151 readdir->cookie = cookie;
1da177e4
LT		 152 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
153 return;
154 }
155
156 readdir->cookie = 0;
157 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
158 if (cookie == 2)
159 return;
160
161 /*
162 * NFSv4 servers do not return entries for '.' and '..'
163 * Therefore, we fake these entries here. We let '.'
164 * have cookie 0 and '..' have cookie 1. Note that
165 * when talking to the server, we always send cookie 0
166 * instead of 1 or 2.
167 */
0dbb4c67 168 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 169
170 if (cookie == 0) {
171 *p++ = xdr_one; /* next */
172 *p++ = xdr_zero; /* cookie, first word */
173 *p++ = xdr_one; /* cookie, second word */
174 *p++ = xdr_one; /* entry len */
175 memcpy(p, ".\0\0\0", 4); /* entry */
176 p++;
177 *p++ = xdr_one; /* bitmap length */
178 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
179 *p++ = htonl(8); /* attribute buffer length */
180 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
181 }
182
183 *p++ = xdr_one; /* next */
184 *p++ = xdr_zero; /* cookie, first word */
185 *p++ = xdr_two; /* cookie, second word */
186 *p++ = xdr_two; /* entry len */
187 memcpy(p, "..\0\0", 4); /* entry */
188 p++;
189 *p++ = xdr_one; /* bitmap length */
190 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
191 *p++ = htonl(8); /* attribute buffer length */
192 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
193
194 readdir->pgbase = (char *)p - (char *)start;
195 readdir->count -= readdir->pgbase;
196 kunmap_atomic(start, KM_USER0);
197}
198
26e976a8 199static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 200{
7539bbab 201 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 202 spin_lock(&clp->cl_lock);
203 if (time_before(clp->cl_last_renewal,timestamp))
204 clp->cl_last_renewal = timestamp;
205 spin_unlock(&clp->cl_lock);
206}
207
38478b24 208static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 209{
38478b24 210 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 211
38478b24
TM		 212 spin_lock(&dir->i_lock);
213 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
1da177e4
LT		 214 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
215 nfsi->change_attr = cinfo->after;
38478b24 216 spin_unlock(&dir->i_lock);
1da177e4
LT		 217}
218
e56e0b78 219struct nfs4_opendata {
c6d00e63 220 struct kref kref;
e56e0b78
TM		 221 struct nfs_openargs o_arg;
222 struct nfs_openres o_res;
cdd4e68b
TM		 223 struct nfs_open_confirmargs c_arg;
224 struct nfs_open_confirmres c_res;
e56e0b78
TM		 225 struct nfs_fattr f_attr;
226 struct nfs_fattr dir_attr;
ad389da7 227 struct path path;
e56e0b78
TM		 228 struct dentry *dir;
229 struct nfs4_state_owner *owner;
aac00a8d 230 struct nfs4_state *state;
e56e0b78 231 struct iattr attrs;
26e976a8 232 unsigned long timestamp;
3e309914 233 unsigned int rpc_done : 1;
24ac23ab
TM		 234 int rpc_status;
235 int cancelled;
e56e0b78
TM		 236};
237
2ced46c2
TM		 238
239static void nfs4_init_opendata_res(struct nfs4_opendata *p)
240{
241 p->o_res.f_attr = &p->f_attr;
242 p->o_res.dir_attr = &p->dir_attr;
243 p->o_res.server = p->o_arg.server;
244 nfs_fattr_init(&p->f_attr);
245 nfs_fattr_init(&p->dir_attr);
246}
247
ad389da7 248static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
e56e0b78
TM		 249 struct nfs4_state_owner *sp, int flags,
250 const struct iattr *attrs)
251{
ad389da7 252 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 253 struct inode *dir = parent->d_inode;
254 struct nfs_server *server = NFS_SERVER(dir);
255 struct nfs4_opendata *p;
256
257 p = kzalloc(sizeof(*p), GFP_KERNEL);
258 if (p == NULL)
259 goto err;
260 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
261 if (p->o_arg.seqid == NULL)
262 goto err_free;
ad389da7
TM		 263 p->path.mnt = mntget(path->mnt);
264 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 265 p->dir = parent;
266 p->owner = sp;
267 atomic_inc(&sp->so_count);
268 p->o_arg.fh = NFS_FH(dir);
269 p->o_arg.open_flags = flags,
7539bbab 270 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 271 p->o_arg.id = sp->so_owner_id.id;
ad389da7 272 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 273 p->o_arg.server = server;
274 p->o_arg.bitmask = server->attr_bitmask;
275 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 276 if (flags & O_EXCL) {
277 u32 *s = (u32 *) p->o_arg.u.verifier.data;
278 s[0] = jiffies;
279 s[1] = current->pid;
280 } else if (flags & O_CREAT) {
281 p->o_arg.u.attrs = &p->attrs;
282 memcpy(&p->attrs, attrs, sizeof(p->attrs));
283 }
cdd4e68b
TM		 284 p->c_arg.fh = &p->o_res.fh;
285 p->c_arg.stateid = &p->o_res.stateid;
286 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 287 nfs4_init_opendata_res(p);
c6d00e63 288 kref_init(&p->kref);
e56e0b78
TM		 289 return p;
290err_free:
291 kfree(p);
292err:
293 dput(parent);
294 return NULL;
295}
296
c6d00e63 297static void nfs4_opendata_free(struct kref *kref)
e56e0b78 298{
c6d00e63
TM		 299 struct nfs4_opendata *p = container_of(kref,
300 struct nfs4_opendata, kref);
301
302 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 303 if (p->state != NULL)
304 nfs4_put_open_state(p->state);
c6d00e63
TM		 305 nfs4_put_state_owner(p->owner);
306 dput(p->dir);
307 dput(p->path.dentry);
308 mntput(p->path.mnt);
309 kfree(p);
310}
311
312static void nfs4_opendata_put(struct nfs4_opendata *p)
313{
314 if (p != NULL)
315 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 316}
317
06f814a3
TM		 318static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
319{
320 sigset_t oldset;
321 int ret;
322
323 rpc_clnt_sigmask(task->tk_client, &oldset);
324 ret = rpc_wait_for_completion_task(task);
325 rpc_clnt_sigunmask(task->tk_client, &oldset);
326 return ret;
327}
328
6ee41268
TM		 329static int can_open_cached(struct nfs4_state *state, int mode)
330{
331 int ret = 0;
332 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
333 case FMODE_READ:
334 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 335 break;
336 case FMODE_WRITE:
337 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 338 break;
339 case FMODE_READ|FMODE_WRITE:
340 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
341 }
342 return ret;
343}
344
aac00a8d
TM		 345static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
346{
347 if ((delegation->type & open_flags) != open_flags)
348 return 0;
349 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
350 return 0;
351 return 1;
352}
353
003707c7 354static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
e7616923
TM		 355{
356 switch (open_flags) {
357 case FMODE_WRITE:
358 state->n_wronly++;
359 break;
360 case FMODE_READ:
361 state->n_rdonly++;
362 break;
363 case FMODE_READ|FMODE_WRITE:
364 state->n_rdwr++;
365 }
003707c7
TM		 366 nfs4_state_set_mode_locked(state, state->state | open_flags);
367}
368
369static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
370{
371 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
372 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
373 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
374 switch (open_flags) {
375 case FMODE_READ:
376 set_bit(NFS_O_RDONLY_STATE, &state->flags);
377 break;
378 case FMODE_WRITE:
379 set_bit(NFS_O_WRONLY_STATE, &state->flags);
380 break;
381 case FMODE_READ|FMODE_WRITE:
382 set_bit(NFS_O_RDWR_STATE, &state->flags);
383 }
e7616923
TM		 384}
385
003707c7
TM		 386static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
387{
8bda4e4c 388 write_seqlock(&state->seqlock);
003707c7 389 nfs_set_open_stateid_locked(state, stateid, open_flags);
8bda4e4c 390 write_sequnlock(&state->seqlock);
003707c7
TM		 391}
392
393static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
1da177e4 394{
1da177e4 395 open_flags &= (FMODE_READ|FMODE_WRITE);
8bda4e4c
TM		 396 /*
397 * Protect the call to nfs4_state_set_mode_locked and
398 * serialise the stateid update
399 */
400 write_seqlock(&state->seqlock);
003707c7
TM		 401 if (deleg_stateid != NULL) {
402 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
403 set_bit(NFS_DELEGATED_STATE, &state->flags);
404 }
405 if (open_stateid != NULL)
406 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
8bda4e4c
TM		 407 write_sequnlock(&state->seqlock);
408 spin_lock(&state->owner->so_lock);
e7616923 409 update_open_stateflags(state, open_flags);
ec073428 410 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 411}
412
aac00a8d
TM		 413static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
414{
415 struct nfs_delegation *delegation;
416
417 rcu_read_lock();
418 delegation = rcu_dereference(NFS_I(inode)->delegation);
419 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
420 rcu_read_unlock();
421 return;
422 }
423 rcu_read_unlock();
424 nfs_inode_return_delegation(inode);
425}
426
6ee41268 427static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 428{
429 struct nfs4_state *state = opendata->state;
430 struct nfs_inode *nfsi = NFS_I(state->inode);
431 struct nfs_delegation *delegation;
432 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
433 nfs4_stateid stateid;
434 int ret = -EAGAIN;
435
436 rcu_read_lock();
437 delegation = rcu_dereference(nfsi->delegation);
aac00a8d 438 for (;;) {
6ee41268
TM		 439 if (can_open_cached(state, open_mode)) {
440 spin_lock(&state->owner->so_lock);
441 if (can_open_cached(state, open_mode)) {
442 update_open_stateflags(state, open_mode);
443 spin_unlock(&state->owner->so_lock);
444 rcu_read_unlock();
445 goto out_return_state;
446 }
447 spin_unlock(&state->owner->so_lock);
448 }
449 if (delegation == NULL)
450 break;
aac00a8d
TM		 451 if (!can_open_delegated(delegation, open_mode))
452 break;
453 /* Save the delegation */
454 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
455 rcu_read_unlock();
456 lock_kernel();
457 ret = _nfs4_do_access(state->inode, state->owner->so_cred, open_mode);
458 unlock_kernel();
459 if (ret != 0)
460 goto out;
461 ret = -EAGAIN;
462 rcu_read_lock();
463 delegation = rcu_dereference(nfsi->delegation);
6ee41268 464 /* If no delegation, try a cached open */
aac00a8d 465 if (delegation == NULL)
6ee41268 466 continue;
aac00a8d
TM		 467 /* Is the delegation still valid? */
468 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
469 continue;
470 rcu_read_unlock();
471 update_open_stateid(state, NULL, &stateid, open_mode);
472 goto out_return_state;
473 }
aac00a8d
TM		 474 rcu_read_unlock();
475out:
476 return ERR_PTR(ret);
477out_return_state:
478 atomic_inc(&state->count);
479 return state;
480}
481
24ac23ab
TM		 482static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
483{
484 struct inode *inode;
485 struct nfs4_state *state = NULL;
003707c7
TM		 486 struct nfs_delegation *delegation;
487 nfs4_stateid *deleg_stateid = NULL;
1b370bc2 488 int ret;
24ac23ab 489
aac00a8d 490 if (!data->rpc_done) {
6ee41268 491 state = nfs4_try_open_cached(data);
aac00a8d
TM		 492 goto out;
493 }
494
1b370bc2 495 ret = -EAGAIN;
24ac23ab 496 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 497 goto err;
24ac23ab 498 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 499 ret = PTR_ERR(inode);
03f28e3a 500 if (IS_ERR(inode))
1b370bc2
TM		 501 goto err;
502 ret = -ENOMEM;
24ac23ab
TM		 503 state = nfs4_get_open_state(inode, data->owner);
504 if (state == NULL)
1b370bc2 505 goto err_put_inode;
549d6ed5 506 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 507 int delegation_flags = 0;
508
003707c7
TM		 509 rcu_read_lock();
510 delegation = rcu_dereference(NFS_I(inode)->delegation);
511 if (delegation)
512 delegation_flags = delegation->flags;
513 rcu_read_unlock();
549d6ed5
TM		 514 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
515 nfs_inode_set_delegation(state->inode,
516 data->owner->so_cred,
517 &data->o_res);
518 else
519 nfs_inode_reclaim_delegation(state->inode,
520 data->owner->so_cred,
521 &data->o_res);
522 }
003707c7
TM		 523 rcu_read_lock();
524 delegation = rcu_dereference(NFS_I(inode)->delegation);
525 if (delegation != NULL)
526 deleg_stateid = &delegation->stateid;
527 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
528 rcu_read_unlock();
24ac23ab 529 iput(inode);
aac00a8d 530out:
24ac23ab 531 return state;
1b370bc2
TM		 532err_put_inode:
533 iput(inode);
534err:
535 return ERR_PTR(ret);
24ac23ab
TM		 536}
537
864472e9
TM		 538static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
539{
540 struct nfs_inode *nfsi = NFS_I(state->inode);
541 struct nfs_open_context *ctx;
542
543 spin_lock(&state->inode->i_lock);
544 list_for_each_entry(ctx, &nfsi->open_files, list) {
545 if (ctx->state != state)
546 continue;
547 get_nfs_open_context(ctx);
548 spin_unlock(&state->inode->i_lock);
549 return ctx;
550 }
551 spin_unlock(&state->inode->i_lock);
552 return ERR_PTR(-ENOENT);
553}
554
6f220ed5
TM		 555static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
556{
557 struct nfs4_opendata *opendata;
558
559 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
560 if (opendata == NULL)
561 return ERR_PTR(-ENOMEM);
562 opendata->state = state;
563 atomic_inc(&state->count);
564 return opendata;
565}
566
2ced46c2 567static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
864472e9 568{
2ced46c2 569 struct nfs4_state *newstate;
864472e9
TM		 570 int ret;
571
572 opendata->o_arg.open_flags = openflags;
2ced46c2
TM		 573 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
574 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
575 nfs4_init_opendata_res(opendata);
864472e9
TM		 576 ret = _nfs4_proc_open(opendata);
577 if (ret != 0)
578 return ret;
2ced46c2 579 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 580 if (IS_ERR(newstate))
581 return PTR_ERR(newstate);
582 nfs4_close_state(&opendata->path, newstate, openflags);
2ced46c2 583 *res = newstate;
864472e9
TM		 584 return 0;
585}
586
587static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
588{
864472e9 589 struct nfs4_state *newstate;
864472e9
TM		 590 int ret;
591
592 /* memory barrier prior to reading state->n_* */
2ced46c2 593 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 594 smp_rmb();
595 if (state->n_rdwr != 0) {
2ced46c2 596 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 597 if (ret != 0)
598 return ret;
2ced46c2
TM		 599 if (newstate != state)
600 return -ESTALE;
864472e9
TM		 601 }
602 if (state->n_wronly != 0) {
2ced46c2 603 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 604 if (ret != 0)
605 return ret;
2ced46c2
TM		 606 if (newstate != state)
607 return -ESTALE;
864472e9
TM		 608 }
609 if (state->n_rdonly != 0) {
2ced46c2 610 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 611 if (ret != 0)
612 return ret;
2ced46c2
TM		 613 if (newstate != state)
614 return -ESTALE;
864472e9 615 }
1ac7e2fd
TM		 616 /*
617 * We may have performed cached opens for all three recoveries.
618 * Check if we need to update the current stateid.
619 */
620 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
621 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 622 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 623 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
624 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 625 write_sequnlock(&state->seqlock);
1ac7e2fd 626 }
864472e9
TM		 627 return 0;
628}
629
1da177e4
LT		 630/*
631 * OPEN_RECLAIM:
632 * reclaim state on the server after a reboot.
1da177e4 633 */
539cd03a 634static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 635{
1ac7e2fd 636 struct nfs_delegation *delegation;
864472e9
TM		 637 struct nfs4_opendata *opendata;
638 int delegation_type = 0;
1da177e4
LT		 639 int status;
640
6f220ed5
TM		 641 opendata = nfs4_open_recoverdata_alloc(ctx, state);
642 if (IS_ERR(opendata))
643 return PTR_ERR(opendata);
864472e9
TM		 644 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
645 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 646 rcu_read_lock();
647 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
648 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
649 delegation_type = delegation->flags;
650 rcu_read_unlock();
864472e9
TM		 651 opendata->o_arg.u.delegation_type = delegation_type;
652 status = nfs4_open_recover(opendata, state);
c6d00e63 653 nfs4_opendata_put(opendata);
1da177e4
LT		 654 return status;
655}
656
539cd03a 657static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 658{
659 struct nfs_server *server = NFS_SERVER(state->inode);
660 struct nfs4_exception exception = { };
661 int err;
662 do {
539cd03a 663 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 664 if (err != -NFS4ERR_DELAY)
665 break;
666 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 667 } while (exception.retry);
668 return err;
669}
670
864472e9
TM		 671static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
672{
673 struct nfs_open_context *ctx;
674 int ret;
675
676 ctx = nfs4_state_find_open_context(state);
677 if (IS_ERR(ctx))
678 return PTR_ERR(ctx);
539cd03a 679 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 680 put_nfs_open_context(ctx);
681 return ret;
682}
683
13437e12 684static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 685{
e56e0b78 686 struct nfs4_opendata *opendata;
864472e9 687 int ret;
1da177e4 688
6f220ed5
TM		 689 opendata = nfs4_open_recoverdata_alloc(ctx, state);
690 if (IS_ERR(opendata))
691 return PTR_ERR(opendata);
e56e0b78 692 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 693 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 694 sizeof(opendata->o_arg.u.delegation.data));
864472e9 695 ret = nfs4_open_recover(opendata, state);
c6d00e63 696 nfs4_opendata_put(opendata);
864472e9 697 return ret;
1da177e4
LT		 698}
699
13437e12 700int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 701{
702 struct nfs4_exception exception = { };
539cd03a 703 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 704 int err;
705 do {
13437e12 706 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 707 switch (err) {
708 case 0:
709 return err;
710 case -NFS4ERR_STALE_CLIENTID:
711 case -NFS4ERR_STALE_STATEID:
712 case -NFS4ERR_EXPIRED:
713 /* Don't recall a delegation if it was lost */
7539bbab 714 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 715 return err;
716 }
717 err = nfs4_handle_exception(server, err, &exception);
718 } while (exception.retry);
719 return err;
720}
721
cdd4e68b 722static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1da177e4 723{
cdd4e68b
TM		 724 struct nfs4_opendata *data = calldata;
725 struct rpc_message msg = {
726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
727 .rpc_argp = &data->c_arg,
728 .rpc_resp = &data->c_res,
729 .rpc_cred = data->owner->so_cred,
1da177e4 730 };
26e976a8 731 data->timestamp = jiffies;
cdd4e68b
TM		 732 rpc_call_setup(task, &msg, 0);
733}
734
735static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
736{
737 struct nfs4_opendata *data = calldata;
738
739 data->rpc_status = task->tk_status;
740 if (RPC_ASSASSINATED(task))
741 return;
26e976a8 742 if (data->rpc_status == 0) {
cdd4e68b
TM		 743 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
744 sizeof(data->o_res.stateid.data));
26e976a8 745 renew_lease(data->o_res.server, data->timestamp);
3e309914 746 data->rpc_done = 1;
26e976a8 747 }
cdd4e68b 748 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
0f9f95e0 749 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
cdd4e68b
TM		 750}
751
752static void nfs4_open_confirm_release(void *calldata)
753{
754 struct nfs4_opendata *data = calldata;
755 struct nfs4_state *state = NULL;
756
757 /* If this request hasn't been cancelled, do nothing */
758 if (data->cancelled == 0)
759 goto out_free;
760 /* In case of error, no cleanup! */
3e309914 761 if (!data->rpc_done)
cdd4e68b
TM		 762 goto out_free;
763 nfs_confirm_seqid(&data->owner->so_seqid, 0);
764 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 765 if (!IS_ERR(state))
4a35bd41 766 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
cdd4e68b 767out_free:
c6d00e63 768 nfs4_opendata_put(data);
cdd4e68b
TM		 769}
770
771static const struct rpc_call_ops nfs4_open_confirm_ops = {
772 .rpc_call_prepare = nfs4_open_confirm_prepare,
773 .rpc_call_done = nfs4_open_confirm_done,
774 .rpc_release = nfs4_open_confirm_release,
775};
776
777/*
778 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
779 */
780static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
781{
782 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
783 struct rpc_task *task;
1da177e4
LT		 784 int status;
785
c6d00e63 786 kref_get(&data->kref);
3e309914
TM		 787 data->rpc_done = 0;
788 data->rpc_status = 0;
cdd4e68b 789 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
7a1218a2 790 if (IS_ERR(task))
cdd4e68b 791 return PTR_ERR(task);
cdd4e68b
TM		 792 status = nfs4_wait_for_completion_rpc_task(task);
793 if (status != 0) {
794 data->cancelled = 1;
795 smp_wmb();
796 } else
797 status = data->rpc_status;
e6b3c4db 798 rpc_put_task(task);
1da177e4
LT		 799 return status;
800}
801
24ac23ab 802static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 803{
24ac23ab
TM		 804 struct nfs4_opendata *data = calldata;
805 struct nfs4_state_owner *sp = data->owner;
1da177e4
LT		 806 struct rpc_message msg = {
807 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
24ac23ab
TM		 808 .rpc_argp = &data->o_arg,
809 .rpc_resp = &data->o_res,
1da177e4
LT		 810 .rpc_cred = sp->so_cred,
811 };
24ac23ab
TM		 812
813 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
814 return;
aac00a8d
TM		 815 /*
816 * Check if we still need to send an OPEN call, or if we can use
817 * a delegation instead.
818 */
819 if (data->state != NULL) {
820 struct nfs_delegation *delegation;
821
6ee41268
TM		 822 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
823 goto out_no_action;
aac00a8d
TM		 824 rcu_read_lock();
825 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
826 if (delegation != NULL &&
827 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
828 rcu_read_unlock();
6ee41268 829 goto out_no_action;
aac00a8d
TM		 830 }
831 rcu_read_unlock();
832 }
24ac23ab 833 /* Update sequence id. */
9f958ab8 834 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 835 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 836 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
864472e9 837 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 838 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
839 }
26e976a8 840 data->timestamp = jiffies;
24ac23ab 841 rpc_call_setup(task, &msg, 0);
6ee41268
TM		 842 return;
843out_no_action:
844 task->tk_action = NULL;
845
24ac23ab 846}
1da177e4 847
24ac23ab
TM		 848static void nfs4_open_done(struct rpc_task *task, void *calldata)
849{
850 struct nfs4_opendata *data = calldata;
1da177e4 851
24ac23ab
TM		 852 data->rpc_status = task->tk_status;
853 if (RPC_ASSASSINATED(task))
854 return;
855 if (task->tk_status == 0) {
856 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 857 case S_IFREG:
858 break;
859 case S_IFLNK:
24ac23ab 860 data->rpc_status = -ELOOP;
6f926b5b
TM		 861 break;
862 case S_IFDIR:
24ac23ab 863 data->rpc_status = -EISDIR;
6f926b5b
TM		 864 break;
865 default:
24ac23ab 866 data->rpc_status = -ENOTDIR;
6f926b5b 867 }
26e976a8 868 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 869 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
870 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 871 }
24ac23ab 872 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
3e309914 873 data->rpc_done = 1;
24ac23ab 874}
6f926b5b 875
24ac23ab
TM		 876static void nfs4_open_release(void *calldata)
877{
878 struct nfs4_opendata *data = calldata;
879 struct nfs4_state *state = NULL;
880
881 /* If this request hasn't been cancelled, do nothing */
882 if (data->cancelled == 0)
883 goto out_free;
884 /* In case of error, no cleanup! */
3e309914 885 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 886 goto out_free;
887 /* In case we need an open_confirm, no cleanup! */
888 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
889 goto out_free;
890 nfs_confirm_seqid(&data->owner->so_seqid, 0);
891 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 892 if (!IS_ERR(state))
4a35bd41 893 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
24ac23ab 894out_free:
c6d00e63 895 nfs4_opendata_put(data);
24ac23ab
TM		 896}
897
898static const struct rpc_call_ops nfs4_open_ops = {
899 .rpc_call_prepare = nfs4_open_prepare,
900 .rpc_call_done = nfs4_open_done,
901 .rpc_release = nfs4_open_release,
902};
903
904/*
905 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
906 */
907static int _nfs4_proc_open(struct nfs4_opendata *data)
908{
909 struct inode *dir = data->dir->d_inode;
910 struct nfs_server *server = NFS_SERVER(dir);
911 struct nfs_openargs *o_arg = &data->o_arg;
912 struct nfs_openres *o_res = &data->o_res;
913 struct rpc_task *task;
914 int status;
915
c6d00e63 916 kref_get(&data->kref);
3e309914
TM		 917 data->rpc_done = 0;
918 data->rpc_status = 0;
2ced46c2 919 data->cancelled = 0;
24ac23ab 920 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
7a1218a2 921 if (IS_ERR(task))
24ac23ab 922 return PTR_ERR(task);
24ac23ab
TM		 923 status = nfs4_wait_for_completion_rpc_task(task);
924 if (status != 0) {
925 data->cancelled = 1;
926 smp_wmb();
927 } else
928 status = data->rpc_status;
e6b3c4db 929 rpc_put_task(task);
3e309914 930 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 931 return status;
932
9936781d
TM		 933 if (o_res->fh.size == 0)
934 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
935
56ae19f3
TM		 936 if (o_arg->open_flags & O_CREAT) {
937 update_changeattr(dir, &o_res->cinfo);
938 nfs_post_op_update_inode(dir, o_res->dir_attr);
939 } else
940 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 941 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 942 status = _nfs4_proc_open_confirm(data);
1da177e4 943 if (status != 0)
24ac23ab 944 return status;
1da177e4
LT		 945 }
946 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 947 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 948 return 0;
1da177e4
LT		 949}
950
951static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
952{
953 struct nfs_access_entry cache;
954 int mask = 0;
955 int status;
956
957 if (openflags & FMODE_READ)
958 mask |= MAY_READ;
959 if (openflags & FMODE_WRITE)
960 mask |= MAY_WRITE;
1b45c46c
TM		 961 if (openflags & FMODE_EXEC)
962 mask |= MAY_EXEC;
1da177e4
LT		 963 status = nfs_access_get_cached(inode, cred, &cache);
964 if (status == 0)
965 goto out;
966
967 /* Be clever: ask server to check for all possible rights */
968 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
969 cache.cred = cred;
970 cache.jiffies = jiffies;
971 status = _nfs4_proc_access(inode, &cache);
972 if (status != 0)
973 return status;
974 nfs_access_add_cache(inode, &cache);
975out:
976 if ((cache.mask & mask) == mask)
977 return 0;
978 return -EACCES;
979}
980
10afec90 981static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 982{
7539bbab 983 struct nfs_client *clp = server->nfs_client;
6b30954e 984 int ret;
58d9714a 985
6b30954e
TM		 986 for (;;) {
987 ret = nfs4_wait_clnt_recover(server->client, clp);
988 if (ret != 0)
989 return ret;
990 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
991 break;
58d9714a 992 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 993 }
994 return 0;
58d9714a
TM		 995}
996
1da177e4
LT		 997/*
998 * OPEN_EXPIRED:
999 * reclaim state on the server after a network partition.
1000 * Assumes caller holds the appropriate lock
1001 */
539cd03a 1002static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1003{
e56e0b78 1004 struct nfs4_opendata *opendata;
864472e9 1005 int ret;
1da177e4 1006
6f220ed5
TM		 1007 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1008 if (IS_ERR(opendata))
1009 return PTR_ERR(opendata);
864472e9
TM		 1010 ret = nfs4_open_recover(opendata, state);
1011 if (ret == -ESTALE) {
1012 /* Invalidate the state owner so we don't ever use it again */
539cd03a
TM		 1013 nfs4_drop_state_owner(state->owner);
1014 d_drop(ctx->path.dentry);
1da177e4 1015 }
c6d00e63 1016 nfs4_opendata_put(opendata);
864472e9 1017 return ret;
1da177e4
LT		 1018}
1019
539cd03a 1020static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1021{
539cd03a 1022 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1023 struct nfs4_exception exception = { };
1024 int err;
1025
1026 do {
539cd03a 1027 err = _nfs4_open_expired(ctx, state);
202b50dc
TM		 1028 if (err == -NFS4ERR_DELAY)
1029 nfs4_handle_exception(server, err, &exception);
1030 } while (exception.retry);
1031 return err;
1032}
1033
1da177e4
LT		 1034static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1035{
1da177e4 1036 struct nfs_open_context *ctx;
864472e9 1037 int ret;
1da177e4 1038
864472e9
TM		 1039 ctx = nfs4_state_find_open_context(state);
1040 if (IS_ERR(ctx))
1041 return PTR_ERR(ctx);
539cd03a 1042 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1043 put_nfs_open_context(ctx);
1044 return ret;
1da177e4
LT		 1045}
1046
aa53ed54
JL		 1047/*
1048 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1049 * fields corresponding to attributes that were used to store the verifier.
1050 * Make sure we clobber those fields in the later setattr call
1051 */
1052static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1053{
1054 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1055 !(sattr->ia_valid & ATTR_ATIME_SET))
1056 sattr->ia_valid |= ATTR_ATIME;
1057
1058 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1059 !(sattr->ia_valid & ATTR_MTIME_SET))
1060 sattr->ia_valid |= ATTR_MTIME;
1061}
1062
1da177e4 1063/*
24ac23ab 1064 * Returns a referenced nfs4_state
1da177e4 1065 */
ad389da7 1066static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1067{
1068 struct nfs4_state_owner *sp;
1069 struct nfs4_state *state = NULL;
1070 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 1071 struct nfs_client *clp = server->nfs_client;
e56e0b78 1072 struct nfs4_opendata *opendata;
aac00a8d 1073 int status;
1da177e4
LT		 1074
1075 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1076 status = -ENOMEM;
1077 if (!(sp = nfs4_get_state_owner(server, cred))) {
1078 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1079 goto out_err;
1080 }
58d9714a
TM		 1081 status = nfs4_recover_expired_lease(server);
1082 if (status != 0)
b4454fe1 1083 goto err_put_state_owner;
aac00a8d
TM		 1084 if (path->dentry->d_inode != NULL)
1085 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
58d9714a
TM		 1086 down_read(&clp->cl_sem);
1087 status = -ENOMEM;
ad389da7 1088 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
e56e0b78 1089 if (opendata == NULL)
76723de0 1090 goto err_release_rwsem;
1da177e4 1091
aac00a8d
TM		 1092 if (path->dentry->d_inode != NULL)
1093 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1094
24ac23ab 1095 status = _nfs4_proc_open(opendata);
1da177e4 1096 if (status != 0)
c6d00e63 1097 goto err_opendata_put;
1da177e4 1098
aa53ed54
JL		 1099 if (opendata->o_arg.open_flags & O_EXCL)
1100 nfs4_exclusive_attrset(opendata, sattr);
1101
24ac23ab 1102 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1103 status = PTR_ERR(state);
1104 if (IS_ERR(state))
c6d00e63 1105 goto err_opendata_put;
c6d00e63 1106 nfs4_opendata_put(opendata);
1da177e4
LT		 1107 nfs4_put_state_owner(sp);
1108 up_read(&clp->cl_sem);
1109 *res = state;
1110 return 0;
c6d00e63
TM		 1111err_opendata_put:
1112 nfs4_opendata_put(opendata);
76723de0
TM		 1113err_release_rwsem:
1114 up_read(&clp->cl_sem);
e56e0b78
TM		 1115err_put_state_owner:
1116 nfs4_put_state_owner(sp);
1da177e4 1117out_err:
1da177e4
LT		 1118 *res = NULL;
1119 return status;
1120}
1121
1122
ad389da7 1123static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1124{
1125 struct nfs4_exception exception = { };
1126 struct nfs4_state *res;
1127 int status;
1128
1129 do {
ad389da7 1130 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1da177e4
LT		 1131 if (status == 0)
1132 break;
1133 /* NOTE: BAD_SEQID means the server and client disagree about the
1134 * book-keeping w.r.t. state-changing operations
1135 * (OPEN/CLOSE/LOCK/LOCKU...)
1136 * It is actually a sign of a bug on the client or on the server.
1137 *
1138 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1139 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1140 * have unhashed the old state_owner for us, and that we can
1141 * therefore safely retry using a new one. We should still warn
1142 * the user though...
1143 */
1144 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1145 printk(KERN_WARNING "NFS: v4 server %s "
1146 " returned a bad sequence-id error!\n",
1147 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1148 exception.retry = 1;
1149 continue;
1150 }
550f5747
TM		 1151 /*
1152 * BAD_STATEID on OPEN means that the server cancelled our
1153 * state before it received the OPEN_CONFIRM.
1154 * Recover by retrying the request as per the discussion
1155 * on Page 181 of RFC3530.
1156 */
1157 if (status == -NFS4ERR_BAD_STATEID) {
1158 exception.retry = 1;
1159 continue;
1160 }
aac00a8d
TM		 1161 if (status == -EAGAIN) {
1162 /* We must have found a delegation */
1163 exception.retry = 1;
1164 continue;
1165 }
1da177e4
LT		 1166 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1167 status, &exception));
1168 } while (exception.retry);
1169 return res;
1170}
1171
3e4f6290
TM		 1172static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1173 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1174{
3e4f6290 1175 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1176 struct nfs_setattrargs arg = {
3e4f6290 1177 .fh = NFS_FH(inode),
1da177e4
LT		 1178 .iap = sattr,
1179 .server = server,
1180 .bitmask = server->attr_bitmask,
1181 };
1182 struct nfs_setattrres res = {
1183 .fattr = fattr,
1184 .server = server,
1185 };
1186 struct rpc_message msg = {
1187 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1188 .rpc_argp = &arg,
1189 .rpc_resp = &res,
1190 };
26e976a8 1191 unsigned long timestamp = jiffies;
65e4308d 1192 int status;
1da177e4 1193
0e574af1 1194 nfs_fattr_init(fattr);
1da177e4 1195
3e4f6290
TM		 1196 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1197 /* Use that stateid */
1198 } else if (state != NULL) {
1da177e4 1199 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1200 nfs4_copy_stateid(&arg.stateid, state, current->files);
1201 } else
1da177e4
LT		 1202 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1203
65e4308d 1204 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1205 if (status == 0 && state != NULL)
1206 renew_lease(server, timestamp);
65e4308d 1207 return status;
1da177e4
LT		 1208}
1209
3e4f6290
TM		 1210static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1211 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1212{
3e4f6290 1213 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1214 struct nfs4_exception exception = { };
1215 int err;
1216 do {
1217 err = nfs4_handle_exception(server,
3e4f6290 1218 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1219 &exception);
1220 } while (exception.retry);
1221 return err;
1222}
1223
1224struct nfs4_closedata {
4a35bd41 1225 struct path path;
1da177e4
LT		 1226 struct inode *inode;
1227 struct nfs4_state *state;
1228 struct nfs_closeargs arg;
1229 struct nfs_closeres res;
516a6af6 1230 struct nfs_fattr fattr;
26e976a8 1231 unsigned long timestamp;
1da177e4
LT		 1232};
1233
963d8fe5 1234static void nfs4_free_closedata(void *data)
9512135d 1235{
963d8fe5
TM		 1236 struct nfs4_closedata *calldata = data;
1237 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1238
1239 nfs4_put_open_state(calldata->state);
1240 nfs_free_seqid(calldata->arg.seqid);
9512135d 1241 nfs4_put_state_owner(sp);
4a35bd41
TM		 1242 dput(calldata->path.dentry);
1243 mntput(calldata->path.mnt);
9512135d
TM		 1244 kfree(calldata);
1245}
1246
963d8fe5 1247static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1248{
963d8fe5 1249 struct nfs4_closedata *calldata = data;
1da177e4 1250 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1251 struct nfs_server *server = NFS_SERVER(calldata->inode);
1252
4ce70ada
TM		 1253 if (RPC_ASSASSINATED(task))
1254 return;
1da177e4
LT		 1255 /* hmm. we are done with the inode, and in the process of freeing
1256 * the state_owner. we keep this around to process errors
1257 */
cee54fc9 1258 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1259 switch (task->tk_status) {
1260 case 0:
45328c35 1261 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1262 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1263 break;
1264 case -NFS4ERR_STALE_STATEID:
1265 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1266 break;
1267 default:
1268 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1269 rpc_restart_call(task);
1270 return;
1271 }
1272 }
516a6af6 1273 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1274}
1275
4ce70ada 1276static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1277{
4ce70ada 1278 struct nfs4_closedata *calldata = data;
9512135d 1279 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1280 struct rpc_message msg = {
1281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1282 .rpc_argp = &calldata->arg,
1283 .rpc_resp = &calldata->res,
9512135d 1284 .rpc_cred = state->owner->so_cred,
1da177e4 1285 };
003707c7 1286 int clear_rd, clear_wr, clear_rdwr;
9512135d 1287
963d8fe5 1288 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1289 return;
003707c7 1290
003707c7 1291 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1292 spin_lock(&state->owner->so_lock);
003707c7 1293 /* Calculate the change in open mode */
e7616923 1294 if (state->n_rdwr == 0) {
003707c7 1295 if (state->n_rdonly == 0) {
003707c7
TM		 1296 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1297 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1298 }
1299 if (state->n_wronly == 0) {
003707c7
TM		 1300 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1301 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1302 }
e7616923 1303 }
4cecb76f 1304 spin_unlock(&state->owner->so_lock);
003707c7 1305 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1306 /* Note: exit _without_ calling nfs4_close_done */
1307 task->tk_action = NULL;
9512135d
TM		 1308 return;
1309 }
516a6af6 1310 nfs_fattr_init(calldata->res.fattr);
45328c35 1311 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1da177e4 1312 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1313 calldata->arg.open_flags = FMODE_READ;
1314 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1315 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1316 calldata->arg.open_flags = FMODE_WRITE;
1317 }
26e976a8 1318 calldata->timestamp = jiffies;
9512135d 1319 rpc_call_setup(task, &msg, 0);
1da177e4
LT		 1320}
1321
963d8fe5 1322static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1323 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1324 .rpc_call_done = nfs4_close_done,
1325 .rpc_release = nfs4_free_closedata,
1326};
1327
1da177e4
LT		 1328/*
1329 * It is possible for data to be read/written from a mem-mapped file
1330 * after the sys_close call (which hits the vfs layer as a flush).
1331 * This means that we can't safely call nfsv4 close on a file until
1332 * the inode is cleared. This in turn means that we are not good
1333 * NFSv4 citizens - we do not indicate to the server to update the file's
1334 * share state even when we are done with one of the three share
1335 * stateid's in the inode.
1336 *
1337 * NOTE: Caller must be holding the sp->so_owner semaphore!
1338 */
4a35bd41 1339int nfs4_do_close(struct path *path, struct nfs4_state *state)
1da177e4 1340{
4a35bd41 1341 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1342 struct nfs4_closedata *calldata;
b39e625b
TM		 1343 struct nfs4_state_owner *sp = state->owner;
1344 struct rpc_task *task;
9512135d 1345 int status = -ENOMEM;
1da177e4 1346
9512135d 1347 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1348 if (calldata == NULL)
9512135d 1349 goto out;
4a35bd41 1350 calldata->inode = state->inode;
1da177e4 1351 calldata->state = state;
4a35bd41 1352 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1353 calldata->arg.stateid = &state->open_stateid;
1da177e4 1354 /* Serialization for the sequence id */
cee54fc9 1355 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1356 if (calldata->arg.seqid == NULL)
1357 goto out_free_calldata;
516a6af6
TM		 1358 calldata->arg.bitmask = server->attr_bitmask;
1359 calldata->res.fattr = &calldata->fattr;
1360 calldata->res.server = server;
4a35bd41
TM		 1361 calldata->path.mnt = mntget(path->mnt);
1362 calldata->path.dentry = dget(path->dentry);
9512135d 1363
b39e625b
TM		 1364 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
1365 if (IS_ERR(task))
1366 return PTR_ERR(task);
1367 rpc_put_task(task);
1368 return 0;
9512135d
TM		 1369out_free_calldata:
1370 kfree(calldata);
1371out:
b39e625b
TM		 1372 nfs4_put_open_state(state);
1373 nfs4_put_state_owner(sp);
9512135d 1374 return status;
1da177e4
LT		 1375}
1376
4a35bd41 1377static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM		 1378{
1379 struct file *filp;
1b45c46c 1380 int ret;
02a913a7 1381
1b45c46c
TM		 1382 /* If the open_intent is for execute, we have an extra check to make */
1383 if (nd->intent.open.flags & FMODE_EXEC) {
1384 ret = _nfs4_do_access(state->inode,
1385 state->owner->so_cred,
1386 nd->intent.open.flags);
1387 if (ret < 0)
1388 goto out_close;
1389 }
4a35bd41 1390 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1391 if (!IS_ERR(filp)) {
1392 struct nfs_open_context *ctx;
1393 ctx = (struct nfs_open_context *)filp->private_data;
1394 ctx->state = state;
95cf959b
TM		 1395 return 0;
1396 }
1b45c46c
TM		 1397 ret = PTR_ERR(filp);
1398out_close:
4a35bd41 1399 nfs4_close_state(path, state, nd->intent.open.flags);
1b45c46c 1400 return ret;
02a913a7
TM		 1401}
1402
1403struct dentry *
1da177e4
LT		 1404nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1405{
ad389da7
TM		 1406 struct path path = {
1407 .mnt = nd->mnt,
1408 .dentry = dentry,
1409 };
1da177e4
LT		 1410 struct iattr attr;
1411 struct rpc_cred *cred;
1412 struct nfs4_state *state;
02a913a7 1413 struct dentry *res;
1da177e4
LT		 1414
1415 if (nd->flags & LOOKUP_CREATE) {
1416 attr.ia_mode = nd->intent.open.create_mode;
1417 attr.ia_valid = ATTR_MODE;
1418 if (!IS_POSIXACL(dir))
1419 attr.ia_mode &= ~current->fs->umask;
1420 } else {
1421 attr.ia_valid = 0;
1422 BUG_ON(nd->intent.open.flags & O_CREAT);
1423 }
1424
1f163415 1425 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4 1426 if (IS_ERR(cred))
02a913a7 1427 return (struct dentry *)cred;
ad389da7 1428 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1429 put_rpccred(cred);
02a913a7
TM		 1430 if (IS_ERR(state)) {
1431 if (PTR_ERR(state) == -ENOENT)
1432 d_add(dentry, NULL);
1433 return (struct dentry *)state;
1434 }
24ac23ab 1435 res = d_add_unique(dentry, igrab(state->inode));
02a913a7
TM		 1436 if (res != NULL)
1437 dentry = res;
4a35bd41 1438 nfs4_intent_set_file(nd, &path, state);
02a913a7 1439 return res;
1da177e4
LT		 1440}
1441
1442int
02a913a7 1443nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1444{
ad389da7
TM		 1445 struct path path = {
1446 .mnt = nd->mnt,
1447 .dentry = dentry,
1448 };
1da177e4
LT		 1449 struct rpc_cred *cred;
1450 struct nfs4_state *state;
1da177e4 1451
1f163415 1452 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1453 if (IS_ERR(cred))
1454 return PTR_ERR(cred);
aac00a8d 1455 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1456 put_rpccred(cred);
02a913a7
TM		 1457 if (IS_ERR(state)) {
1458 switch (PTR_ERR(state)) {
1459 case -EPERM:
1460 case -EACCES:
1461 case -EDQUOT:
1462 case -ENOSPC:
1463 case -EROFS:
1464 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1465 return 1;
b87c0adf
CL		 1466 default:
1467 goto out_drop;
02a913a7 1468 }
02a913a7 1469 }
24ac23ab 1470 if (state->inode == dentry->d_inode) {
4a35bd41 1471 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1472 return 1;
1473 }
4a35bd41 1474 nfs4_close_state(&path, state, openflags);
02a913a7
TM		 1475out_drop:
1476 d_drop(dentry);
1da177e4
LT		 1477 return 0;
1478}
1479
1480
1481static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1482{
1483 struct nfs4_server_caps_res res = {};
1484 struct rpc_message msg = {
1485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1486 .rpc_argp = fhandle,
1487 .rpc_resp = &res,
1488 };
1489 int status;
1490
1491 status = rpc_call_sync(server->client, &msg, 0);
1492 if (status == 0) {
1493 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1494 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1495 server->caps |= NFS_CAP_ACLS;
1496 if (res.has_links != 0)
1497 server->caps |= NFS_CAP_HARDLINKS;
1498 if (res.has_symlinks != 0)
1499 server->caps |= NFS_CAP_SYMLINKS;
1500 server->acl_bitmask = res.acl_bitmask;
1501 }
1502 return status;
1503}
1504
55a97593 1505int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1506{
1507 struct nfs4_exception exception = { };
1508 int err;
1509 do {
1510 err = nfs4_handle_exception(server,
1511 _nfs4_server_capabilities(server, fhandle),
1512 &exception);
1513 } while (exception.retry);
1514 return err;
1515}
1516
1517static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1518 struct nfs_fsinfo *info)
1519{
1da177e4
LT		 1520 struct nfs4_lookup_root_arg args = {
1521 .bitmask = nfs4_fattr_bitmap,
1522 };
1523 struct nfs4_lookup_res res = {
1524 .server = server,
0e574af1 1525 .fattr = info->fattr,
1da177e4
LT		 1526 .fh = fhandle,
1527 };
1528 struct rpc_message msg = {
1529 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1530 .rpc_argp = &args,
1531 .rpc_resp = &res,
1532 };
0e574af1 1533 nfs_fattr_init(info->fattr);
1da177e4
LT		 1534 return rpc_call_sync(server->client, &msg, 0);
1535}
1536
1537static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1538 struct nfs_fsinfo *info)
1539{
1540 struct nfs4_exception exception = { };
1541 int err;
1542 do {
1543 err = nfs4_handle_exception(server,
1544 _nfs4_lookup_root(server, fhandle, info),
1545 &exception);
1546 } while (exception.retry);
1547 return err;
1548}
1549
54ceac45
DH		 1550/*
1551 * get the file handle for the "/" directory on the server
1552 */
1da177e4 1553static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1554 struct nfs_fsinfo *info)
1da177e4 1555{
1da177e4
LT		 1556 int status;
1557
1da177e4 1558 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1559 if (status == 0)
1560 status = nfs4_server_capabilities(server, fhandle);
1561 if (status == 0)
1562 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1563 return nfs4_map_errors(status);
1da177e4
LT		 1564}
1565
6b97fd3d
MN		 1566/*
1567 * Get locations and (maybe) other attributes of a referral.
1568 * Note that we'll actually follow the referral later when
1569 * we detect fsid mismatch in inode revalidation
1570 */
56659e99 1571static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1572{
1573 int status = -ENOMEM;
1574 struct page *page = NULL;
1575 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1576
1577 page = alloc_page(GFP_KERNEL);
1578 if (page == NULL)
1579 goto out;
1580 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1581 if (locations == NULL)
1582 goto out;
1583
c228fd3a 1584 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1585 if (status != 0)
1586 goto out;
1587 /* Make sure server returned a different fsid for the referral */
1588 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1589 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1590 status = -EIO;
1591 goto out;
1592 }
1593
1594 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1595 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1596 if (!fattr->mode)
1597 fattr->mode = S_IFDIR;
1598 memset(fhandle, 0, sizeof(struct nfs_fh));
1599out:
1600 if (page)
1601 __free_page(page);
1602 if (locations)
1603 kfree(locations);
1604 return status;
1605}
1606
1da177e4
LT		 1607static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1608{
1609 struct nfs4_getattr_arg args = {
1610 .fh = fhandle,
1611 .bitmask = server->attr_bitmask,
1612 };
1613 struct nfs4_getattr_res res = {
1614 .fattr = fattr,
1615 .server = server,
1616 };
1617 struct rpc_message msg = {
1618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1619 .rpc_argp = &args,
1620 .rpc_resp = &res,
1621 };
1622
0e574af1 1623 nfs_fattr_init(fattr);
1da177e4
LT		 1624 return rpc_call_sync(server->client, &msg, 0);
1625}
1626
1627static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1628{
1629 struct nfs4_exception exception = { };
1630 int err;
1631 do {
1632 err = nfs4_handle_exception(server,
1633 _nfs4_proc_getattr(server, fhandle, fattr),
1634 &exception);
1635 } while (exception.retry);
1636 return err;
1637}
1638
1639/*
1640 * The file is not closed if it is opened due to the a request to change
1641 * the size of the file. The open call will not be needed once the
1642 * VFS layer lookup-intents are implemented.
1643 *
1644 * Close is called when the inode is destroyed.
1645 * If we haven't opened the file for O_WRONLY, we
1646 * need to in the size_change case to obtain a stateid.
1647 *
1648 * Got race?
1649 * Because OPEN is always done by name in nfsv4, it is
1650 * possible that we opened a different file by the same
1651 * name. We can recognize this race condition, but we
1652 * can't do anything about it besides returning an error.
1653 *
1654 * This will be fixed with VFS changes (lookup-intent).
1655 */
1656static int
1657nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1658 struct iattr *sattr)
1659{
08e9eac4
TM		 1660 struct rpc_cred *cred;
1661 struct inode *inode = dentry->d_inode;
d530838b
TM		 1662 struct nfs_open_context *ctx;
1663 struct nfs4_state *state = NULL;
1da177e4
LT		 1664 int status;
1665
0e574af1 1666 nfs_fattr_init(fattr);
1da177e4 1667
1f163415 1668 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
08e9eac4
TM		 1669 if (IS_ERR(cred))
1670 return PTR_ERR(cred);
d530838b
TM		 1671
1672 /* Search for an existing open(O_WRITE) file */
1673 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1674 if (ctx != NULL)
1675 state = ctx->state;
08e9eac4 1676
3e4f6290 1677 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1678 if (status == 0)
1679 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1680 if (ctx != NULL)
1681 put_nfs_open_context(ctx);
08e9eac4 1682 put_rpccred(cred);
1da177e4
LT		 1683 return status;
1684}
1685
56659e99
TM		 1686static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1687 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1688 struct nfs_fattr *fattr)
1689{
1690 int status;
1691 struct nfs4_lookup_arg args = {
1692 .bitmask = server->attr_bitmask,
1693 .dir_fh = dirfh,
1694 .name = name,
1695 };
1696 struct nfs4_lookup_res res = {
1697 .server = server,
1698 .fattr = fattr,
1699 .fh = fhandle,
1700 };
1701 struct rpc_message msg = {
1702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1703 .rpc_argp = &args,
1704 .rpc_resp = &res,
1705 };
1706
1707 nfs_fattr_init(fattr);
1708
1709 dprintk("NFS call lookupfh %s\n", name->name);
1710 status = rpc_call_sync(server->client, &msg, 0);
1711 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1712 return status;
1713}
1714
1715static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1716 struct qstr *name, struct nfs_fh *fhandle,
1717 struct nfs_fattr *fattr)
1718{
1719 struct nfs4_exception exception = { };
1720 int err;
1721 do {
4e56e082
TM		 1722 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1723 /* FIXME: !!!! */
1724 if (err == -NFS4ERR_MOVED) {
1725 err = -EREMOTE;
1726 break;
1727 }
1728 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1729 } while (exception.retry);
1730 return err;
1731}
1732
56659e99 1733static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1734 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1735{
4e56e082 1736 int status;
1da177e4
LT		 1737
1738 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1739 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1740 if (status == -NFS4ERR_MOVED)
1741 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1742 dprintk("NFS reply lookup: %d\n", status);
1743 return status;
1744}
1745
1746static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1747{
1748 struct nfs4_exception exception = { };
1749 int err;
1750 do {
1751 err = nfs4_handle_exception(NFS_SERVER(dir),
1752 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1753 &exception);
1754 } while (exception.retry);
1755 return err;
1756}
1757
1758static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1759{
1760 struct nfs4_accessargs args = {
1761 .fh = NFS_FH(inode),
1762 };
1763 struct nfs4_accessres res = { 0 };
1764 struct rpc_message msg = {
1765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1766 .rpc_argp = &args,
1767 .rpc_resp = &res,
1768 .rpc_cred = entry->cred,
1769 };
1770 int mode = entry->mask;
1771 int status;
1772
1773 /*
1774 * Determine which access bits we want to ask for...
1775 */
1776 if (mode & MAY_READ)
1777 args.access |= NFS4_ACCESS_READ;
1778 if (S_ISDIR(inode->i_mode)) {
1779 if (mode & MAY_WRITE)
1780 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1781 if (mode & MAY_EXEC)
1782 args.access |= NFS4_ACCESS_LOOKUP;
1783 } else {
1784 if (mode & MAY_WRITE)
1785 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1786 if (mode & MAY_EXEC)
1787 args.access |= NFS4_ACCESS_EXECUTE;
1788 }
1789 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1790 if (!status) {
1791 entry->mask = 0;
1792 if (res.access & NFS4_ACCESS_READ)
1793 entry->mask |= MAY_READ;
1794 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1795 entry->mask |= MAY_WRITE;
1796 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1797 entry->mask |= MAY_EXEC;
1798 }
1799 return status;
1800}
1801
1802static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1803{
1804 struct nfs4_exception exception = { };
1805 int err;
1806 do {
1807 err = nfs4_handle_exception(NFS_SERVER(inode),
1808 _nfs4_proc_access(inode, entry),
1809 &exception);
1810 } while (exception.retry);
1811 return err;
1812}
1813
1814/*
1815 * TODO: For the time being, we don't try to get any attributes
1816 * along with any of the zero-copy operations READ, READDIR,
1817 * READLINK, WRITE.
1818 *
1819 * In the case of the first three, we want to put the GETATTR
1820 * after the read-type operation -- this is because it is hard
1821 * to predict the length of a GETATTR response in v4, and thus
1822 * align the READ data correctly. This means that the GETATTR
1823 * may end up partially falling into the page cache, and we should
1824 * shift it into the 'tail' of the xdr_buf before processing.
1825 * To do this efficiently, we need to know the total length
1826 * of data received, which doesn't seem to be available outside
1827 * of the RPC layer.
1828 *
1829 * In the case of WRITE, we also want to put the GETATTR after
1830 * the operation -- in this case because we want to make sure
1831 * we get the post-operation mtime and size. This means that
1832 * we can't use xdr_encode_pages() as written: we need a variant
1833 * of it which would leave room in the 'tail' iovec.
1834 *
1835 * Both of these changes to the XDR layer would in fact be quite
1836 * minor, but I decided to leave them for a subsequent patch.
1837 */
1838static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1839 unsigned int pgbase, unsigned int pglen)
1840{
1841 struct nfs4_readlink args = {
1842 .fh = NFS_FH(inode),
1843 .pgbase = pgbase,
1844 .pglen = pglen,
1845 .pages = &page,
1846 };
1847 struct rpc_message msg = {
1848 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1849 .rpc_argp = &args,
1850 .rpc_resp = NULL,
1851 };
1852
1853 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1854}
1855
1856static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1857 unsigned int pgbase, unsigned int pglen)
1858{
1859 struct nfs4_exception exception = { };
1860 int err;
1861 do {
1862 err = nfs4_handle_exception(NFS_SERVER(inode),
1863 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1864 &exception);
1865 } while (exception.retry);
1866 return err;
1867}
1868
1da177e4
LT		 1869/*
1870 * Got race?
1871 * We will need to arrange for the VFS layer to provide an atomic open.
1872 * Until then, this create/open method is prone to inefficiency and race
1873 * conditions due to the lookup, create, and open VFS calls from sys_open()
1874 * placed on the wire.
1875 *
1876 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1877 * The file will be opened again in the subsequent VFS open call
1878 * (nfs4_proc_file_open).
1879 *
1880 * The open for read will just hang around to be used by any process that
1881 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1882 */
1883
1884static int
1885nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1886 int flags, struct nameidata *nd)
1da177e4 1887{
ad389da7
TM		 1888 struct path path = {
1889 .mnt = nd->mnt,
1890 .dentry = dentry,
1891 };
1da177e4
LT		 1892 struct nfs4_state *state;
1893 struct rpc_cred *cred;
1894 int status = 0;
1895
1f163415 1896 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1897 if (IS_ERR(cred)) {
1898 status = PTR_ERR(cred);
1899 goto out;
1900 }
ad389da7 1901 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1da177e4
LT		 1902 put_rpccred(cred);
1903 if (IS_ERR(state)) {
1904 status = PTR_ERR(state);
1905 goto out;
1906 }
24ac23ab 1907 d_instantiate(dentry, igrab(state->inode));
1da177e4
LT		 1908 if (flags & O_EXCL) {
1909 struct nfs_fattr fattr;
3e4f6290 1910 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1911 if (status == 0)
65e4308d 1912 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 1913 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 1914 }
ad389da7 1915 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
4a35bd41 1916 status = nfs4_intent_set_file(nd, &path, state);
02a913a7 1917 else
4a35bd41 1918 nfs4_close_state(&path, state, flags);
1da177e4
LT		 1919out:
1920 return status;
1921}
1922
1923static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1924{
16e42959 1925 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 1926 struct nfs_removeargs args = {
1da177e4 1927 .fh = NFS_FH(dir),
4fdc17b2
TM		 1928 .name.len = name->len,
1929 .name.name = name->name,
16e42959
TM		 1930 .bitmask = server->attr_bitmask,
1931 };
4fdc17b2 1932 struct nfs_removeres res = {
16e42959 1933 .server = server,
1da177e4 1934 };
1da177e4 1935 struct rpc_message msg = {
4fdc17b2
TM		 1936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1937 .rpc_argp = &args,
1938 .rpc_resp = &res,
1da177e4
LT		 1939 };
1940 int status;
1941
4fdc17b2 1942 nfs_fattr_init(&res.dir_attr);
16e42959
TM		 1943 status = rpc_call_sync(server->client, &msg, 0);
1944 if (status == 0) {
1945 update_changeattr(dir, &res.cinfo);
4fdc17b2 1946 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 1947 }
1da177e4
LT		 1948 return status;
1949}
1950
1951static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1952{
1953 struct nfs4_exception exception = { };
1954 int err;
1955 do {
1956 err = nfs4_handle_exception(NFS_SERVER(dir),
1957 _nfs4_proc_remove(dir, name),
1958 &exception);
1959 } while (exception.retry);
1960 return err;
1961}
1962
e4eff1a6 1963static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 1964{
e4eff1a6
TM		 1965 struct nfs_server *server = NFS_SERVER(dir);
1966 struct nfs_removeargs *args = msg->rpc_argp;
1967 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 1968
e4eff1a6
TM		 1969 args->bitmask = server->attr_bitmask;
1970 res->server = server;
1da177e4 1971 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 1972}
1973
e4eff1a6 1974static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 1975{
e4eff1a6
TM		 1976 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1977
1978 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1979 return 0;
1980 update_changeattr(dir, &res->cinfo);
1981 nfs_post_op_update_inode(dir, &res->dir_attr);
1982 return 1;
1da177e4
LT		 1983}
1984
1985static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1986 struct inode *new_dir, struct qstr *new_name)
1987{
6caf2c82 1988 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1989 struct nfs4_rename_arg arg = {
1990 .old_dir = NFS_FH(old_dir),
1991 .new_dir = NFS_FH(new_dir),
1992 .old_name = old_name,
1993 .new_name = new_name,
6caf2c82
TM		 1994 .bitmask = server->attr_bitmask,
1995 };
1996 struct nfs_fattr old_fattr, new_fattr;
1997 struct nfs4_rename_res res = {
1998 .server = server,
1999 .old_fattr = &old_fattr,
2000 .new_fattr = &new_fattr,
1da177e4 2001 };
1da177e4
LT		 2002 struct rpc_message msg = {
2003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2004 .rpc_argp = &arg,
2005 .rpc_resp = &res,
2006 };
2007 int status;
2008
6caf2c82
TM		 2009 nfs_fattr_init(res.old_fattr);
2010 nfs_fattr_init(res.new_fattr);
2011 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2012
2013 if (!status) {
2014 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2015 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2016 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2017 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2018 }
2019 return status;
2020}
2021
2022static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2023 struct inode *new_dir, struct qstr *new_name)
2024{
2025 struct nfs4_exception exception = { };
2026 int err;
2027 do {
2028 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2029 _nfs4_proc_rename(old_dir, old_name,
2030 new_dir, new_name),
2031 &exception);
2032 } while (exception.retry);
2033 return err;
2034}
2035
2036static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2037{
91ba2eee 2038 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2039 struct nfs4_link_arg arg = {
2040 .fh = NFS_FH(inode),
2041 .dir_fh = NFS_FH(dir),
2042 .name = name,
91ba2eee
TM		 2043 .bitmask = server->attr_bitmask,
2044 };
2045 struct nfs_fattr fattr, dir_attr;
2046 struct nfs4_link_res res = {
2047 .server = server,
2048 .fattr = &fattr,
2049 .dir_attr = &dir_attr,
1da177e4 2050 };
1da177e4
LT		 2051 struct rpc_message msg = {
2052 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2053 .rpc_argp = &arg,
91ba2eee 2054 .rpc_resp = &res,
1da177e4
LT		 2055 };
2056 int status;
2057
91ba2eee
TM		 2058 nfs_fattr_init(res.fattr);
2059 nfs_fattr_init(res.dir_attr);
2060 status = rpc_call_sync(server->client, &msg, 0);
2061 if (!status) {
2062 update_changeattr(dir, &res.cinfo);
2063 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2064 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2065 }
1da177e4
LT		 2066
2067 return status;
2068}
2069
2070static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2071{
2072 struct nfs4_exception exception = { };
2073 int err;
2074 do {
2075 err = nfs4_handle_exception(NFS_SERVER(inode),
2076 _nfs4_proc_link(inode, dir, name),
2077 &exception);
2078 } while (exception.retry);
2079 return err;
2080}
2081
4f390c15 2082static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2083 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2084{
2085 struct nfs_server *server = NFS_SERVER(dir);
4f390c15
CL		 2086 struct nfs_fh fhandle;
2087 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2088 struct nfs4_create_arg arg = {
2089 .dir_fh = NFS_FH(dir),
2090 .server = server,
4f390c15 2091 .name = &dentry->d_name,
1da177e4
LT		 2092 .attrs = sattr,
2093 .ftype = NF4LNK,
2094 .bitmask = server->attr_bitmask,
2095 };
2096 struct nfs4_create_res res = {
2097 .server = server,
4f390c15
CL		 2098 .fh = &fhandle,
2099 .fattr = &fattr,
56ae19f3 2100 .dir_fattr = &dir_fattr,
1da177e4
LT		 2101 };
2102 struct rpc_message msg = {
2103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2104 .rpc_argp = &arg,
2105 .rpc_resp = &res,
2106 };
2107 int status;
2108
94a6d753 2109 if (len > NFS4_MAXPATHLEN)
1da177e4 2110 return -ENAMETOOLONG;
4f390c15 2111
94a6d753
CL		 2112 arg.u.symlink.pages = &page;
2113 arg.u.symlink.len = len;
4f390c15 2114 nfs_fattr_init(&fattr);
56ae19f3 2115 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2116
2117 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
4f390c15 2118 if (!status) {
1da177e4 2119 update_changeattr(dir, &res.dir_cinfo);
4f390c15
CL		 2120 nfs_post_op_update_inode(dir, res.dir_fattr);
2121 status = nfs_instantiate(dentry, &fhandle, &fattr);
2122 }
1da177e4
LT		 2123 return status;
2124}
2125
4f390c15 2126static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2127 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2128{
2129 struct nfs4_exception exception = { };
2130 int err;
2131 do {
2132 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2133 _nfs4_proc_symlink(dir, dentry, page,
2134 len, sattr),
1da177e4
LT		 2135 &exception);
2136 } while (exception.retry);
2137 return err;
2138}
2139
2140static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2141 struct iattr *sattr)
2142{
2143 struct nfs_server *server = NFS_SERVER(dir);
2144 struct nfs_fh fhandle;
56ae19f3 2145 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2146 struct nfs4_create_arg arg = {
2147 .dir_fh = NFS_FH(dir),
2148 .server = server,
2149 .name = &dentry->d_name,
2150 .attrs = sattr,
2151 .ftype = NF4DIR,
2152 .bitmask = server->attr_bitmask,
2153 };
2154 struct nfs4_create_res res = {
2155 .server = server,
2156 .fh = &fhandle,
2157 .fattr = &fattr,
56ae19f3 2158 .dir_fattr = &dir_fattr,
1da177e4
LT		 2159 };
2160 struct rpc_message msg = {
2161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2162 .rpc_argp = &arg,
2163 .rpc_resp = &res,
2164 };
2165 int status;
2166
0e574af1 2167 nfs_fattr_init(&fattr);
56ae19f3 2168 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2169
2170 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2171 if (!status) {
2172 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2173 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2174 status = nfs_instantiate(dentry, &fhandle, &fattr);
2175 }
2176 return status;
2177}
2178
2179static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2180 struct iattr *sattr)
2181{
2182 struct nfs4_exception exception = { };
2183 int err;
2184 do {
2185 err = nfs4_handle_exception(NFS_SERVER(dir),
2186 _nfs4_proc_mkdir(dir, dentry, sattr),
2187 &exception);
2188 } while (exception.retry);
2189 return err;
2190}
2191
2192static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2193 u64 cookie, struct page *page, unsigned int count, int plus)
2194{
2195 struct inode *dir = dentry->d_inode;
2196 struct nfs4_readdir_arg args = {
2197 .fh = NFS_FH(dir),
2198 .pages = &page,
2199 .pgbase = 0,
2200 .count = count,
2201 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2202 };
2203 struct nfs4_readdir_res res;
2204 struct rpc_message msg = {
2205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2206 .rpc_argp = &args,
2207 .rpc_resp = &res,
2208 .rpc_cred = cred,
2209 };
2210 int status;
2211
eadf4598
TM		 2212 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2213 dentry->d_parent->d_name.name,
2214 dentry->d_name.name,
2215 (unsigned long long)cookie);
1da177e4
LT		 2216 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2217 res.pgbase = args.pgbase;
2218 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2219 if (status == 0)
2220 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
eadf4598 2221 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2222 return status;
2223}
2224
2225static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2226 u64 cookie, struct page *page, unsigned int count, int plus)
2227{
2228 struct nfs4_exception exception = { };
2229 int err;
2230 do {
2231 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2232 _nfs4_proc_readdir(dentry, cred, cookie,
2233 page, count, plus),
2234 &exception);
2235 } while (exception.retry);
2236 return err;
2237}
2238
2239static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2240 struct iattr *sattr, dev_t rdev)
2241{
2242 struct nfs_server *server = NFS_SERVER(dir);
2243 struct nfs_fh fh;
56ae19f3 2244 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2245 struct nfs4_create_arg arg = {
2246 .dir_fh = NFS_FH(dir),
2247 .server = server,
2248 .name = &dentry->d_name,
2249 .attrs = sattr,
2250 .bitmask = server->attr_bitmask,
2251 };
2252 struct nfs4_create_res res = {
2253 .server = server,
2254 .fh = &fh,
2255 .fattr = &fattr,
56ae19f3 2256 .dir_fattr = &dir_fattr,
1da177e4
LT		 2257 };
2258 struct rpc_message msg = {
2259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2260 .rpc_argp = &arg,
2261 .rpc_resp = &res,
2262 };
2263 int status;
2264 int mode = sattr->ia_mode;
2265
0e574af1 2266 nfs_fattr_init(&fattr);
56ae19f3 2267 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2268
2269 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2270 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2271 if (S_ISFIFO(mode))
2272 arg.ftype = NF4FIFO;
2273 else if (S_ISBLK(mode)) {
2274 arg.ftype = NF4BLK;
2275 arg.u.device.specdata1 = MAJOR(rdev);
2276 arg.u.device.specdata2 = MINOR(rdev);
2277 }
2278 else if (S_ISCHR(mode)) {
2279 arg.ftype = NF4CHR;
2280 arg.u.device.specdata1 = MAJOR(rdev);
2281 arg.u.device.specdata2 = MINOR(rdev);
2282 }
2283 else
2284 arg.ftype = NF4SOCK;
2285
2286 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2287 if (status == 0) {
2288 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2289 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2290 status = nfs_instantiate(dentry, &fh, &fattr);
2291 }
2292 return status;
2293}
2294
2295static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2296 struct iattr *sattr, dev_t rdev)
2297{
2298 struct nfs4_exception exception = { };
2299 int err;
2300 do {
2301 err = nfs4_handle_exception(NFS_SERVER(dir),
2302 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2303 &exception);
2304 } while (exception.retry);
2305 return err;
2306}
2307
2308static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2309 struct nfs_fsstat *fsstat)
2310{
2311 struct nfs4_statfs_arg args = {
2312 .fh = fhandle,
2313 .bitmask = server->attr_bitmask,
2314 };
2315 struct rpc_message msg = {
2316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2317 .rpc_argp = &args,
2318 .rpc_resp = fsstat,
2319 };
2320
0e574af1 2321 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2322 return rpc_call_sync(server->client, &msg, 0);
2323}
2324
2325static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2326{
2327 struct nfs4_exception exception = { };
2328 int err;
2329 do {
2330 err = nfs4_handle_exception(server,
2331 _nfs4_proc_statfs(server, fhandle, fsstat),
2332 &exception);
2333 } while (exception.retry);
2334 return err;
2335}
2336
2337static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2338 struct nfs_fsinfo *fsinfo)
2339{
2340 struct nfs4_fsinfo_arg args = {
2341 .fh = fhandle,
2342 .bitmask = server->attr_bitmask,
2343 };
2344 struct rpc_message msg = {
2345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2346 .rpc_argp = &args,
2347 .rpc_resp = fsinfo,
2348 };
2349
2350 return rpc_call_sync(server->client, &msg, 0);
2351}
2352
2353static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2354{
2355 struct nfs4_exception exception = { };
2356 int err;
2357
2358 do {
2359 err = nfs4_handle_exception(server,
2360 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2361 &exception);
2362 } while (exception.retry);
2363 return err;
2364}
2365
2366static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2367{
0e574af1 2368 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2369 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2370}
2371
2372static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2373 struct nfs_pathconf *pathconf)
2374{
2375 struct nfs4_pathconf_arg args = {
2376 .fh = fhandle,
2377 .bitmask = server->attr_bitmask,
2378 };
2379 struct rpc_message msg = {
2380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2381 .rpc_argp = &args,
2382 .rpc_resp = pathconf,
2383 };
2384
2385 /* None of the pathconf attributes are mandatory to implement */
2386 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2387 memset(pathconf, 0, sizeof(*pathconf));
2388 return 0;
2389 }
2390
0e574af1 2391 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2392 return rpc_call_sync(server->client, &msg, 0);
2393}
2394
2395static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2396 struct nfs_pathconf *pathconf)
2397{
2398 struct nfs4_exception exception = { };
2399 int err;
2400
2401 do {
2402 err = nfs4_handle_exception(server,
2403 _nfs4_proc_pathconf(server, fhandle, pathconf),
2404 &exception);
2405 } while (exception.retry);
2406 return err;
2407}
2408
ec06c096 2409static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2410{
ec06c096 2411 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2412
ec06c096 2413 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2414 rpc_restart_call(task);
ec06c096 2415 return -EAGAIN;
1da177e4
LT		 2416 }
2417 if (task->tk_status > 0)
ec06c096
TM		 2418 renew_lease(server, data->timestamp);
2419 return 0;
1da177e4
LT		 2420}
2421
ec06c096 2422static void nfs4_proc_read_setup(struct nfs_read_data *data)
1da177e4 2423{
1da177e4
LT		 2424 struct rpc_message msg = {
2425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2426 .rpc_argp = &data->args,
2427 .rpc_resp = &data->res,
2428 .rpc_cred = data->cred,
2429 };
1da177e4
LT		 2430
2431 data->timestamp = jiffies;
2432
ec06c096 2433 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2434}
2435
788e7a89 2436static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2437{
1da177e4
LT		 2438 struct inode *inode = data->inode;
2439
2440 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2441 rpc_restart_call(task);
788e7a89 2442 return -EAGAIN;
1da177e4 2443 }
4f9838c7 2444 if (task->tk_status >= 0) {
1da177e4 2445 renew_lease(NFS_SERVER(inode), data->timestamp);
4f9838c7
TM		 2446 nfs_post_op_update_inode(inode, data->res.fattr);
2447 }
788e7a89 2448 return 0;
1da177e4
LT		 2449}
2450
788e7a89 2451static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1da177e4 2452{
1da177e4
LT		 2453 struct rpc_message msg = {
2454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2455 .rpc_argp = &data->args,
2456 .rpc_resp = &data->res,
2457 .rpc_cred = data->cred,
2458 };
2459 struct inode *inode = data->inode;
4f9838c7 2460 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2461 int stable;
1da177e4
LT		 2462
2463 if (how & FLUSH_STABLE) {
2464 if (!NFS_I(inode)->ncommit)
2465 stable = NFS_FILE_SYNC;
2466 else
2467 stable = NFS_DATA_SYNC;
2468 } else
2469 stable = NFS_UNSTABLE;
2470 data->args.stable = stable;
4f9838c7
TM		 2471 data->args.bitmask = server->attr_bitmask;
2472 data->res.server = server;
1da177e4
LT		 2473
2474 data->timestamp = jiffies;
2475
1da177e4 2476 /* Finalize the task. */
788e7a89 2477 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2478}
2479
788e7a89 2480static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2481{
1da177e4
LT		 2482 struct inode *inode = data->inode;
2483
2484 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2485 rpc_restart_call(task);
788e7a89 2486 return -EAGAIN;
1da177e4 2487 }
4f9838c7
TM		 2488 if (task->tk_status >= 0)
2489 nfs_post_op_update_inode(inode, data->res.fattr);
788e7a89 2490 return 0;
1da177e4
LT		 2491}
2492
788e7a89 2493static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1da177e4 2494{
1da177e4
LT		 2495 struct rpc_message msg = {
2496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2497 .rpc_argp = &data->args,
2498 .rpc_resp = &data->res,
2499 .rpc_cred = data->cred,
2500 };
788e7a89 2501 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2502
4f9838c7
TM		 2503 data->args.bitmask = server->attr_bitmask;
2504 data->res.server = server;
2505
788e7a89 2506 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2507}
2508
2509/*
2510 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2511 * standalone procedure for queueing an asynchronous RENEW.
2512 */
963d8fe5 2513static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2514{
adfa6f98 2515 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2516 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2517
2518 if (task->tk_status < 0) {
2519 switch (task->tk_status) {
2520 case -NFS4ERR_STALE_CLIENTID:
2521 case -NFS4ERR_EXPIRED:
2522 case -NFS4ERR_CB_PATH_DOWN:
2523 nfs4_schedule_state_recovery(clp);
2524 }
2525 return;
2526 }
2527 spin_lock(&clp->cl_lock);
2528 if (time_before(clp->cl_last_renewal,timestamp))
2529 clp->cl_last_renewal = timestamp;
2530 spin_unlock(&clp->cl_lock);
2531}
2532
963d8fe5
TM		 2533static const struct rpc_call_ops nfs4_renew_ops = {
2534 .rpc_call_done = nfs4_renew_done,
2535};
2536
adfa6f98 2537int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2538{
2539 struct rpc_message msg = {
2540 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2541 .rpc_argp = clp,
b4454fe1 2542 .rpc_cred = cred,
1da177e4
LT		 2543 };
2544
2545 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2546 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2547}
2548
adfa6f98 2549int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2550{
2551 struct rpc_message msg = {
2552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2553 .rpc_argp = clp,
b4454fe1 2554 .rpc_cred = cred,
1da177e4
LT		 2555 };
2556 unsigned long now = jiffies;
2557 int status;
2558
2559 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2560 if (status < 0)
2561 return status;
2562 spin_lock(&clp->cl_lock);
2563 if (time_before(clp->cl_last_renewal,now))
2564 clp->cl_last_renewal = now;
2565 spin_unlock(&clp->cl_lock);
2566 return 0;
2567}
2568
aa1870af
BF		 2569static inline int nfs4_server_supports_acls(struct nfs_server *server)
2570{
2571 return (server->caps & NFS_CAP_ACLS)
2572 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2573 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2574}
2575
2576/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2577 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2578 * the stack.
2579 */
2580#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2581
2582static void buf_to_pages(const void *buf, size_t buflen,
2583 struct page **pages, unsigned int *pgbase)
2584{
2585 const void *p = buf;
2586
2587 *pgbase = offset_in_page(buf);
2588 p -= *pgbase;
2589 while (p < buf + buflen) {
2590 *(pages++) = virt_to_page(p);
2591 p += PAGE_CACHE_SIZE;
2592 }
2593}
2594
e50a1c2e
BF		 2595struct nfs4_cached_acl {
2596 int cached;
2597 size_t len;
3e9d4154 2598 char data[0];
e50a1c2e
BF		 2599};
2600
2601static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2602{
2603 struct nfs_inode *nfsi = NFS_I(inode);
2604
2605 spin_lock(&inode->i_lock);
2606 kfree(nfsi->nfs4_acl);
2607 nfsi->nfs4_acl = acl;
2608 spin_unlock(&inode->i_lock);
2609}
2610
2611static void nfs4_zap_acl_attr(struct inode *inode)
2612{
2613 nfs4_set_cached_acl(inode, NULL);
2614}
2615
2616static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2617{
2618 struct nfs_inode *nfsi = NFS_I(inode);
2619 struct nfs4_cached_acl *acl;
2620 int ret = -ENOENT;
2621
2622 spin_lock(&inode->i_lock);
2623 acl = nfsi->nfs4_acl;
2624 if (acl == NULL)
2625 goto out;
2626 if (buf == NULL) /* user is just asking for length */
2627 goto out_len;
2628 if (acl->cached == 0)
2629 goto out;
2630 ret = -ERANGE; /* see getxattr(2) man page */
2631 if (acl->len > buflen)
2632 goto out;
2633 memcpy(buf, acl->data, acl->len);
2634out_len:
2635 ret = acl->len;
2636out:
2637 spin_unlock(&inode->i_lock);
2638 return ret;
2639}
2640
2641static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2642{
2643 struct nfs4_cached_acl *acl;
2644
2645 if (buf && acl_len <= PAGE_SIZE) {
2646 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2647 if (acl == NULL)
2648 goto out;
2649 acl->cached = 1;
2650 memcpy(acl->data, buf, acl_len);
2651 } else {
2652 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2653 if (acl == NULL)
2654 goto out;
2655 acl->cached = 0;
2656 }
2657 acl->len = acl_len;
2658out:
2659 nfs4_set_cached_acl(inode, acl);
2660}
2661
16b4289c 2662static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2663{
aa1870af
BF		 2664 struct page *pages[NFS4ACL_MAXPAGES];
2665 struct nfs_getaclargs args = {
2666 .fh = NFS_FH(inode),
2667 .acl_pages = pages,
2668 .acl_len = buflen,
2669 };
2670 size_t resp_len = buflen;
e50a1c2e 2671 void *resp_buf;
aa1870af
BF		 2672 struct rpc_message msg = {
2673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2674 .rpc_argp = &args,
2675 .rpc_resp = &resp_len,
2676 };
e50a1c2e 2677 struct page *localpage = NULL;
aa1870af
BF		 2678 int ret;
2679
e50a1c2e
BF		 2680 if (buflen < PAGE_SIZE) {
2681 /* As long as we're doing a round trip to the server anyway,
2682 * let's be prepared for a page of acl data. */
2683 localpage = alloc_page(GFP_KERNEL);
2684 resp_buf = page_address(localpage);
2685 if (localpage == NULL)
2686 return -ENOMEM;
2687 args.acl_pages[0] = localpage;
2688 args.acl_pgbase = 0;
1d95db8e 2689 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2690 } else {
2691 resp_buf = buf;
2692 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2693 }
aa1870af 2694 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2695 if (ret)
2696 goto out_free;
2697 if (resp_len > args.acl_len)
2698 nfs4_write_cached_acl(inode, NULL, resp_len);
2699 else
2700 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2701 if (buf) {
2702 ret = -ERANGE;
2703 if (resp_len > buflen)
2704 goto out_free;
2705 if (localpage)
2706 memcpy(buf, resp_buf, resp_len);
2707 }
2708 ret = resp_len;
2709out_free:
2710 if (localpage)
2711 __free_page(localpage);
aa1870af
BF		 2712 return ret;
2713}
2714
16b4289c
TM		 2715static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2716{
2717 struct nfs4_exception exception = { };
2718 ssize_t ret;
2719 do {
2720 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2721 if (ret >= 0)
2722 break;
2723 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2724 } while (exception.retry);
2725 return ret;
2726}
2727
e50a1c2e
BF		 2728static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2729{
2730 struct nfs_server *server = NFS_SERVER(inode);
2731 int ret;
2732
2733 if (!nfs4_server_supports_acls(server))
2734 return -EOPNOTSUPP;
2735 ret = nfs_revalidate_inode(server, inode);
2736 if (ret < 0)
2737 return ret;
2738 ret = nfs4_read_cached_acl(inode, buf, buflen);
2739 if (ret != -ENOENT)
2740 return ret;
2741 return nfs4_get_acl_uncached(inode, buf, buflen);
2742}
2743
16b4289c 2744static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2745{
2746 struct nfs_server *server = NFS_SERVER(inode);
2747 struct page *pages[NFS4ACL_MAXPAGES];
2748 struct nfs_setaclargs arg = {
2749 .fh = NFS_FH(inode),
2750 .acl_pages = pages,
2751 .acl_len = buflen,
2752 };
2753 struct rpc_message msg = {
2754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2755 .rpc_argp = &arg,
2756 .rpc_resp = NULL,
2757 };
2758 int ret;
2759
2760 if (!nfs4_server_supports_acls(server))
2761 return -EOPNOTSUPP;
642ac549 2762 nfs_inode_return_delegation(inode);
4b580ee3 2763 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2764 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
08efa202 2765 nfs_zap_caches(inode);
4b580ee3
BF		 2766 return ret;
2767}
2768
16b4289c
TM		 2769static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2770{
2771 struct nfs4_exception exception = { };
2772 int err;
2773 do {
2774 err = nfs4_handle_exception(NFS_SERVER(inode),
2775 __nfs4_proc_set_acl(inode, buf, buflen),
2776 &exception);
2777 } while (exception.retry);
2778 return err;
2779}
2780
1da177e4 2781static int
faf5f49c 2782nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2783{
7539bbab 2784 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2785
2786 if (!clp || task->tk_status >= 0)
2787 return 0;
2788 switch(task->tk_status) {
2789 case -NFS4ERR_STALE_CLIENTID:
2790 case -NFS4ERR_STALE_STATEID:
2791 case -NFS4ERR_EXPIRED:
2792 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2793 nfs4_schedule_state_recovery(clp);
433fbe4c 2794 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2795 rpc_wake_up_task(task);
2796 task->tk_status = 0;
2797 return -EAGAIN;
1da177e4 2798 case -NFS4ERR_DELAY:
006ea73e
CL		 2799 nfs_inc_server_stats((struct nfs_server *) server,
2800 NFSIOS_DELAY);
2801 case -NFS4ERR_GRACE:
1da177e4
LT		 2802 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2803 task->tk_status = 0;
2804 return -EAGAIN;
2805 case -NFS4ERR_OLD_STATEID:
2806 task->tk_status = 0;
2807 return -EAGAIN;
2808 }
2809 task->tk_status = nfs4_map_errors(task->tk_status);
2810 return 0;
2811}
2812
433fbe4c
TM		 2813static int nfs4_wait_bit_interruptible(void *word)
2814{
2815 if (signal_pending(current))
2816 return -ERESTARTSYS;
2817 schedule();
2818 return 0;
2819}
2820
adfa6f98 2821static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2822{
1da177e4 2823 sigset_t oldset;
433fbe4c 2824 int res;
1da177e4
LT		 2825
2826 might_sleep();
2827
e148582e
TM		 2828 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2829
1da177e4 2830 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM		 2831 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2832 nfs4_wait_bit_interruptible,
2833 TASK_INTERRUPTIBLE);
1da177e4 2834 rpc_clnt_sigunmask(clnt, &oldset);
e148582e
TM		 2835
2836 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT		 2837 return res;
2838}
2839
2840static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2841{
2842 sigset_t oldset;
2843 int res = 0;
2844
2845 might_sleep();
2846
2847 if (*timeout <= 0)
2848 *timeout = NFS4_POLL_RETRY_MIN;
2849 if (*timeout > NFS4_POLL_RETRY_MAX)
2850 *timeout = NFS4_POLL_RETRY_MAX;
2851 rpc_clnt_sigmask(clnt, &oldset);
2852 if (clnt->cl_intr) {
041e0e3b 2853 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2854 if (signalled())
2855 res = -ERESTARTSYS;
041e0e3b
NA		 2856 } else
2857 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2858 rpc_clnt_sigunmask(clnt, &oldset);
2859 *timeout <<= 1;
2860 return res;
2861}
2862
2863/* This is the error handling routine for processes that are allowed
2864 * to sleep.
2865 */
10afec90 2866static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2867{
7539bbab 2868 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2869 int ret = errorcode;
2870
2871 exception->retry = 0;
2872 switch(errorcode) {
2873 case 0:
2874 return 0;
2875 case -NFS4ERR_STALE_CLIENTID:
2876 case -NFS4ERR_STALE_STATEID:
2877 case -NFS4ERR_EXPIRED:
433fbe4c 2878 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2879 ret = nfs4_wait_clnt_recover(server->client, clp);
2880 if (ret == 0)
2881 exception->retry = 1;
2882 break;
c514983d 2883 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2884 case -NFS4ERR_GRACE:
2885 case -NFS4ERR_DELAY:
2886 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2887 if (ret != 0)
2888 break;
1da177e4 2889 case -NFS4ERR_OLD_STATEID:
2c56617d 2890 exception->retry = 1;
1da177e4
LT		 2891 }
2892 /* We failed to handle the error */
2893 return nfs4_map_errors(ret);
2894}
2895
adfa6f98 2896int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2897{
2898 nfs4_verifier sc_verifier;
2899 struct nfs4_setclientid setclientid = {
2900 .sc_verifier = &sc_verifier,
2901 .sc_prog = program,
2902 };
2903 struct rpc_message msg = {
2904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2905 .rpc_argp = &setclientid,
2906 .rpc_resp = clp,
286d7d6a 2907 .rpc_cred = cred,
1da177e4 2908 };
bc4785cd 2909 __be32 *p;
1da177e4
LT		 2910 int loop = 0;
2911 int status;
2912
bc4785cd 2913 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2914 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2915 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2916
2917 for(;;) {
2918 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2919 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
24c8dbbb 2920 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
286d7d6a 2921 cred->cr_ops->cr_name,
1da177e4
LT		 2922 clp->cl_id_uniquifier);
2923 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2924 sizeof(setclientid.sc_netid), "tcp");
2925 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2926 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2927 clp->cl_ipaddr, port >> 8, port & 255);
2928
2929 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2930 if (status != -NFS4ERR_CLID_INUSE)
2931 break;
2932 if (signalled())
2933 break;
2934 if (loop++ & 1)
2935 ssleep(clp->cl_lease_time + 1);
2936 else
2937 if (++clp->cl_id_uniquifier == 0)
2938 break;
2939 }
2940 return status;
2941}
2942
adfa6f98 2943static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2944{
2945 struct nfs_fsinfo fsinfo;
2946 struct rpc_message msg = {
2947 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2948 .rpc_argp = clp,
2949 .rpc_resp = &fsinfo,
286d7d6a 2950 .rpc_cred = cred,
1da177e4
LT		 2951 };
2952 unsigned long now;
2953 int status;
2954
2955 now = jiffies;
2956 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2957 if (status == 0) {
2958 spin_lock(&clp->cl_lock);
2959 clp->cl_lease_time = fsinfo.lease_time * HZ;
2960 clp->cl_last_renewal = now;
58d9714a 2961 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2962 spin_unlock(&clp->cl_lock);
2963 }
2964 return status;
2965}
2966
adfa6f98 2967int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM		 2968{
2969 long timeout;
2970 int err;
2971 do {
2972 err = _nfs4_proc_setclientid_confirm(clp, cred);
2973 switch (err) {
2974 case 0:
2975 return err;
2976 case -NFS4ERR_RESOURCE:
2977 /* The IBM lawyers misread another document! */
2978 case -NFS4ERR_DELAY:
2979 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2980 }
2981 } while (err == 0);
2982 return err;
2983}
2984
fe650407
TM		 2985struct nfs4_delegreturndata {
2986 struct nfs4_delegreturnargs args;
fa178f29 2987 struct nfs4_delegreturnres res;
fe650407
TM		 2988 struct nfs_fh fh;
2989 nfs4_stateid stateid;
2990 struct rpc_cred *cred;
26e976a8 2991 unsigned long timestamp;
fa178f29 2992 struct nfs_fattr fattr;
fe650407
TM		 2993 int rpc_status;
2994};
2995
2996static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 2997{
fe650407 2998 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT		 2999 struct rpc_message msg = {
3000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407 3001 .rpc_argp = &data->args,
fa178f29 3002 .rpc_resp = &data->res,
fe650407 3003 .rpc_cred = data->cred,
1da177e4 3004 };
fa178f29 3005 nfs_fattr_init(data->res.fattr);
fe650407
TM		 3006 rpc_call_setup(task, &msg, 0);
3007}
1da177e4 3008
fe650407
TM		 3009static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3010{
3011 struct nfs4_delegreturndata *data = calldata;
3012 data->rpc_status = task->tk_status;
26e976a8 3013 if (data->rpc_status == 0)
fa178f29 3014 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3015}
3016
3017static void nfs4_delegreturn_release(void *calldata)
3018{
3019 struct nfs4_delegreturndata *data = calldata;
3020
3021 put_rpccred(data->cred);
3022 kfree(calldata);
3023}
3024
c8d149f3 3025static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3026 .rpc_call_prepare = nfs4_delegreturn_prepare,
3027 .rpc_call_done = nfs4_delegreturn_done,
3028 .rpc_release = nfs4_delegreturn_release,
3029};
3030
3031static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3032{
3033 struct nfs4_delegreturndata *data;
fa178f29 3034 struct nfs_server *server = NFS_SERVER(inode);
fe650407
TM		 3035 struct rpc_task *task;
3036 int status;
3037
3038 data = kmalloc(sizeof(*data), GFP_KERNEL);
3039 if (data == NULL)
3040 return -ENOMEM;
3041 data->args.fhandle = &data->fh;
3042 data->args.stateid = &data->stateid;
fa178f29 3043 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3044 nfs_copy_fh(&data->fh, NFS_FH(inode));
3045 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3046 data->res.fattr = &data->fattr;
3047 data->res.server = server;
fe650407 3048 data->cred = get_rpccred(cred);
26e976a8 3049 data->timestamp = jiffies;
fe650407
TM		 3050 data->rpc_status = 0;
3051
3052 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
7a1218a2 3053 if (IS_ERR(task))
fe650407 3054 return PTR_ERR(task);
fe650407 3055 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 3056 if (status == 0) {
fe650407 3057 status = data->rpc_status;
fa178f29
TM		 3058 if (status == 0)
3059 nfs_post_op_update_inode(inode, &data->fattr);
3060 }
e6b3c4db 3061 rpc_put_task(task);
fe650407 3062 return status;
1da177e4
LT		 3063}
3064
3065int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3066{
3067 struct nfs_server *server = NFS_SERVER(inode);
3068 struct nfs4_exception exception = { };
3069 int err;
3070 do {
3071 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3072 switch (err) {
3073 case -NFS4ERR_STALE_STATEID:
3074 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3075 case 0:
3076 return 0;
3077 }
3078 err = nfs4_handle_exception(server, err, &exception);
3079 } while (exception.retry);
3080 return err;
3081}
3082
3083#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3084#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3085
3086/*
3087 * sleep, with exponential backoff, and retry the LOCK operation.
3088 */
3089static unsigned long
3090nfs4_set_lock_task_retry(unsigned long timeout)
3091{
041e0e3b 3092 schedule_timeout_interruptible(timeout);
1da177e4
LT		 3093 timeout <<= 1;
3094 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3095 return NFS4_LOCK_MAXTIMEOUT;
3096 return timeout;
3097}
3098
1da177e4
LT		 3099static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3100{
3101 struct inode *inode = state->inode;
3102 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3103 struct nfs_client *clp = server->nfs_client;
911d1aaf 3104 struct nfs_lockt_args arg = {
1da177e4 3105 .fh = NFS_FH(inode),
911d1aaf 3106 .fl = request,
1da177e4 3107 };
911d1aaf
TM		 3108 struct nfs_lockt_res res = {
3109 .denied = request,
1da177e4
LT		 3110 };
3111 struct rpc_message msg = {
3112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3113 .rpc_argp = &arg,
3114 .rpc_resp = &res,
3115 .rpc_cred = state->owner->so_cred,
3116 };
1da177e4
LT		 3117 struct nfs4_lock_state *lsp;
3118 int status;
3119
3120 down_read(&clp->cl_sem);
911d1aaf 3121 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3122 status = nfs4_set_lock_state(state, request);
3123 if (status != 0)
3124 goto out;
3125 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3126 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3127 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3128 switch (status) {
3129 case 0:
3130 request->fl_type = F_UNLCK;
3131 break;
3132 case -NFS4ERR_DENIED:
3133 status = 0;
1da177e4 3134 }
70cc6487 3135 request->fl_ops->fl_release_private(request);
8d0a8a9d 3136out:
1da177e4
LT		 3137 up_read(&clp->cl_sem);
3138 return status;
3139}
3140
3141static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3142{
3143 struct nfs4_exception exception = { };
3144 int err;
3145
3146 do {
3147 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3148 _nfs4_proc_getlk(state, cmd, request),
3149 &exception);
3150 } while (exception.retry);
3151 return err;
3152}
3153
3154static int do_vfs_lock(struct file *file, struct file_lock *fl)
3155{
3156 int res = 0;
3157 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3158 case FL_POSIX:
3159 res = posix_lock_file_wait(file, fl);
3160 break;
3161 case FL_FLOCK:
3162 res = flock_lock_file_wait(file, fl);
3163 break;
3164 default:
3165 BUG();
3166 }
1da177e4
LT		 3167 return res;
3168}
3169
faf5f49c 3170struct nfs4_unlockdata {
911d1aaf
TM		 3171 struct nfs_locku_args arg;
3172 struct nfs_locku_res res;
faf5f49c
TM		 3173 struct nfs4_lock_state *lsp;
3174 struct nfs_open_context *ctx;
911d1aaf
TM		 3175 struct file_lock fl;
3176 const struct nfs_server *server;
26e976a8 3177 unsigned long timestamp;
faf5f49c
TM		 3178};
3179
911d1aaf
TM		 3180static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3181 struct nfs_open_context *ctx,
3182 struct nfs4_lock_state *lsp,
3183 struct nfs_seqid *seqid)
3184{
3185 struct nfs4_unlockdata *p;
3186 struct inode *inode = lsp->ls_state->inode;
3187
3188 p = kmalloc(sizeof(*p), GFP_KERNEL);
3189 if (p == NULL)
3190 return NULL;
3191 p->arg.fh = NFS_FH(inode);
3192 p->arg.fl = &p->fl;
3193 p->arg.seqid = seqid;
3194 p->arg.stateid = &lsp->ls_stateid;
3195 p->lsp = lsp;
3196 atomic_inc(&lsp->ls_count);
3197 /* Ensure we don't close file until we're done freeing locks! */
3198 p->ctx = get_nfs_open_context(ctx);
3199 memcpy(&p->fl, fl, sizeof(p->fl));
3200 p->server = NFS_SERVER(inode);
3201 return p;
3202}
3203
06f814a3 3204static void nfs4_locku_release_calldata(void *data)
faf5f49c 3205{
963d8fe5 3206 struct nfs4_unlockdata *calldata = data;
911d1aaf 3207 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3208 nfs4_put_lock_state(calldata->lsp);
3209 put_nfs_open_context(calldata->ctx);
3210 kfree(calldata);
faf5f49c
TM		 3211}
3212
963d8fe5 3213static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3214{
963d8fe5 3215 struct nfs4_unlockdata *calldata = data;
faf5f49c 3216
06f814a3
TM		 3217 if (RPC_ASSASSINATED(task))
3218 return;
911d1aaf 3219 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3220 switch (task->tk_status) {
3221 case 0:
3222 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3223 calldata->res.stateid.data,
faf5f49c 3224 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3225 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3226 break;
3227 case -NFS4ERR_STALE_STATEID:
3228 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3229 break;
3230 default:
a6a352e9 3231 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
faf5f49c 3232 rpc_restart_call(task);
faf5f49c 3233 }
faf5f49c
TM		 3234}
3235
4ce70ada 3236static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3237{
4ce70ada 3238 struct nfs4_unlockdata *calldata = data;
1da177e4
LT		 3239 struct rpc_message msg = {
3240 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM		 3241 .rpc_argp = &calldata->arg,
3242 .rpc_resp = &calldata->res,
3243 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3244 };
faf5f49c 3245
911d1aaf 3246 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3247 return;
3248 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3249 /* Note: exit _without_ running nfs4_locku_done */
3250 task->tk_action = NULL;
faf5f49c
TM		 3251 return;
3252 }
26e976a8 3253 calldata->timestamp = jiffies;
faf5f49c
TM		 3254 rpc_call_setup(task, &msg, 0);
3255}
3256
963d8fe5 3257static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3258 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3259 .rpc_call_done = nfs4_locku_done,
06f814a3 3260 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3261};
3262
a5d16a4d
TM		 3263static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3264 struct nfs_open_context *ctx,
3265 struct nfs4_lock_state *lsp,
3266 struct nfs_seqid *seqid)
3267{
3268 struct nfs4_unlockdata *data;
a5d16a4d 3269
137d6aca
FF		 3270 /* Ensure this is an unlock - when canceling a lock, the
3271 * canceled lock is passed in, and it won't be an unlock.
3272 */
3273 fl->fl_type = F_UNLCK;
3274
a5d16a4d
TM		 3275 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3276 if (data == NULL) {
3277 nfs_free_seqid(seqid);
3278 return ERR_PTR(-ENOMEM);
3279 }
3280
7a1218a2 3281 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
a5d16a4d
TM		 3282}
3283
faf5f49c
TM		 3284static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3285{
911d1aaf 3286 struct nfs_seqid *seqid;
1da177e4 3287 struct nfs4_lock_state *lsp;
06f814a3
TM		 3288 struct rpc_task *task;
3289 int status = 0;
faf5f49c 3290
8d0a8a9d 3291 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3292 /* Unlock _before_ we do the RPC call */
3293 request->fl_flags |= FL_EXISTS;
3294 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3295 goto out;
8d0a8a9d 3296 if (status != 0)
9b073574
TM		 3297 goto out;
3298 /* Is this a delegated lock? */
3299 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3300 goto out;
8d0a8a9d 3301 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3302 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3303 status = -ENOMEM;
911d1aaf 3304 if (seqid == NULL)
9b073574 3305 goto out;
a5d16a4d
TM		 3306 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3307 status = PTR_ERR(task);
3308 if (IS_ERR(task))
9b073574 3309 goto out;
a5d16a4d 3310 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3311 rpc_put_task(task);
9b073574 3312out:
1da177e4
LT		 3313 return status;
3314}
3315
a5d16a4d
TM		 3316struct nfs4_lockdata {
3317 struct nfs_lock_args arg;
3318 struct nfs_lock_res res;
3319 struct nfs4_lock_state *lsp;
3320 struct nfs_open_context *ctx;
3321 struct file_lock fl;
26e976a8 3322 unsigned long timestamp;
a5d16a4d
TM		 3323 int rpc_status;
3324 int cancelled;
3325};
3326
3327static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3328 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3329{
a5d16a4d
TM		 3330 struct nfs4_lockdata *p;
3331 struct inode *inode = lsp->ls_state->inode;
1da177e4 3332 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3333
3334 p = kzalloc(sizeof(*p), GFP_KERNEL);
3335 if (p == NULL)
3336 return NULL;
3337
3338 p->arg.fh = NFS_FH(inode);
3339 p->arg.fl = &p->fl;
3340 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3341 if (p->arg.lock_seqid == NULL)
3342 goto out_free;
3343 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3344 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3345 p->arg.lock_owner.id = lsp->ls_id.id;
a5d16a4d
TM		 3346 p->lsp = lsp;
3347 atomic_inc(&lsp->ls_count);
3348 p->ctx = get_nfs_open_context(ctx);
3349 memcpy(&p->fl, fl, sizeof(p->fl));
3350 return p;
3351out_free:
3352 kfree(p);
3353 return NULL;
3354}
3355
3356static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3357{
3358 struct nfs4_lockdata *data = calldata;
3359 struct nfs4_state *state = data->lsp->ls_state;
3360 struct nfs4_state_owner *sp = state->owner;
1da177e4 3361 struct rpc_message msg = {
a5d16a4d
TM		 3362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3363 .rpc_argp = &data->arg,
3364 .rpc_resp = &data->res,
3365 .rpc_cred = sp->so_cred,
1da177e4 3366 };
06735b34 3367
a5d16a4d
TM		 3368 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3369 return;
3370 dprintk("%s: begin!\n", __FUNCTION__);
3371 /* Do we need to do an open_to_lock_owner? */
3372 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3373 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3374 if (data->arg.open_seqid == NULL) {
3375 data->rpc_status = -ENOMEM;
3376 task->tk_action = NULL;
06735b34 3377 goto out;
8d0a8a9d 3378 }
a5d16a4d
TM		 3379 data->arg.open_stateid = &state->stateid;
3380 data->arg.new_lock_owner = 1;
3381 }
26e976a8 3382 data->timestamp = jiffies;
a5d16a4d 3383 rpc_call_setup(task, &msg, 0);
06735b34 3384out:
a5d16a4d
TM		 3385 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3386}
3387
3388static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3389{
3390 struct nfs4_lockdata *data = calldata;
3391
3392 dprintk("%s: begin!\n", __FUNCTION__);
3393
3394 data->rpc_status = task->tk_status;
3395 if (RPC_ASSASSINATED(task))
3396 goto out;
3397 if (data->arg.new_lock_owner != 0) {
3398 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3399 if (data->rpc_status == 0)
3400 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3401 else
3402 goto out;
3403 }
3404 if (data->rpc_status == 0) {
3405 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3406 sizeof(data->lsp->ls_stateid.data));
3407 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3408 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3409 }
3410 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3411out:
3412 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3413}
3414
3415static void nfs4_lock_release(void *calldata)
3416{
3417 struct nfs4_lockdata *data = calldata;
3418
3419 dprintk("%s: begin!\n", __FUNCTION__);
3420 if (data->arg.open_seqid != NULL)
3421 nfs_free_seqid(data->arg.open_seqid);
3422 if (data->cancelled != 0) {
3423 struct rpc_task *task;
3424 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3425 data->arg.lock_seqid);
3426 if (!IS_ERR(task))
e6b3c4db 3427 rpc_put_task(task);
a5d16a4d
TM		 3428 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3429 } else
3430 nfs_free_seqid(data->arg.lock_seqid);
3431 nfs4_put_lock_state(data->lsp);
3432 put_nfs_open_context(data->ctx);
3433 kfree(data);
3434 dprintk("%s: done!\n", __FUNCTION__);
3435}
3436
3437static const struct rpc_call_ops nfs4_lock_ops = {
3438 .rpc_call_prepare = nfs4_lock_prepare,
3439 .rpc_call_done = nfs4_lock_done,
3440 .rpc_release = nfs4_lock_release,
3441};
3442
3443static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3444{
3445 struct nfs4_lockdata *data;
3446 struct rpc_task *task;
3447 int ret;
3448
3449 dprintk("%s: begin!\n", __FUNCTION__);
3450 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3451 fl->fl_u.nfs4_fl.owner);
3452 if (data == NULL)
3453 return -ENOMEM;
3454 if (IS_SETLKW(cmd))
3455 data->arg.block = 1;
3456 if (reclaim != 0)
3457 data->arg.reclaim = 1;
3458 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3459 &nfs4_lock_ops, data);
7a1218a2 3460 if (IS_ERR(task))
a5d16a4d 3461 return PTR_ERR(task);
a5d16a4d
TM		 3462 ret = nfs4_wait_for_completion_rpc_task(task);
3463 if (ret == 0) {
3464 ret = data->rpc_status;
3465 if (ret == -NFS4ERR_DENIED)
3466 ret = -EAGAIN;
3467 } else
3468 data->cancelled = 1;
e6b3c4db 3469 rpc_put_task(task);
a5d16a4d
TM		 3470 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3471 return ret;
1da177e4
LT		 3472}
3473
3474static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3475{
202b50dc
TM		 3476 struct nfs_server *server = NFS_SERVER(state->inode);
3477 struct nfs4_exception exception = { };
3478 int err;
3479
3480 do {
42a2d13e
TM		 3481 /* Cache the lock if possible... */
3482 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3483 return 0;
202b50dc
TM		 3484 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3485 if (err != -NFS4ERR_DELAY)
3486 break;
3487 nfs4_handle_exception(server, err, &exception);
3488 } while (exception.retry);
3489 return err;
1da177e4
LT		 3490}
3491
3492static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3493{
202b50dc
TM		 3494 struct nfs_server *server = NFS_SERVER(state->inode);
3495 struct nfs4_exception exception = { };
3496 int err;
3497
6bfc93ef
TM		 3498 err = nfs4_set_lock_state(state, request);
3499 if (err != 0)
3500 return err;
202b50dc 3501 do {
42a2d13e
TM		 3502 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3503 return 0;
202b50dc
TM		 3504 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3505 if (err != -NFS4ERR_DELAY)
3506 break;
3507 nfs4_handle_exception(server, err, &exception);
3508 } while (exception.retry);
3509 return err;
1da177e4
LT		 3510}
3511
3512static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3513{
adfa6f98 3514 struct nfs_client *clp = state->owner->so_client;
01c3b861 3515 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3516 int status;
3517
6bfc93ef 3518 /* Is this a delegated open? */
6bfc93ef
TM		 3519 status = nfs4_set_lock_state(state, request);
3520 if (status != 0)
3521 goto out;
01c3b861
TM		 3522 request->fl_flags |= FL_ACCESS;
3523 status = do_vfs_lock(request->fl_file, request);
3524 if (status < 0)
3525 goto out;
3526 down_read(&clp->cl_sem);
3527 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3528 struct nfs_inode *nfsi = NFS_I(state->inode);
3529 /* Yes: cache locks! */
3530 down_read(&nfsi->rwsem);
3531 /* ...but avoid races with delegation recall... */
3532 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3533 request->fl_flags = fl_flags & ~FL_SLEEP;
3534 status = do_vfs_lock(request->fl_file, request);
3535 up_read(&nfsi->rwsem);
3536 goto out_unlock;
3537 }
3538 up_read(&nfsi->rwsem);
3539 }
6bfc93ef
TM		 3540 status = _nfs4_do_setlk(state, cmd, request, 0);
3541 if (status != 0)
01c3b861 3542 goto out_unlock;
6bfc93ef 3543 /* Note: we always want to sleep here! */
01c3b861 3544 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef
TM		 3545 if (do_vfs_lock(request->fl_file, request) < 0)
3546 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
01c3b861 3547out_unlock:
1da177e4 3548 up_read(&clp->cl_sem);
01c3b861
TM		 3549out:
3550 request->fl_flags = fl_flags;
1da177e4
LT		 3551 return status;
3552}
3553
3554static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3555{
3556 struct nfs4_exception exception = { };
3557 int err;
3558
3559 do {
3560 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3561 _nfs4_proc_setlk(state, cmd, request),
3562 &exception);
3563 } while (exception.retry);
3564 return err;
3565}
3566
3567static int
3568nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3569{
3570 struct nfs_open_context *ctx;
3571 struct nfs4_state *state;
3572 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3573 int status;
3574
3575 /* verify open state */
3576 ctx = (struct nfs_open_context *)filp->private_data;
3577 state = ctx->state;
3578
3579 if (request->fl_start < 0 || request->fl_end < 0)
3580 return -EINVAL;
3581
3582 if (IS_GETLK(cmd))
3583 return nfs4_proc_getlk(state, F_GETLK, request);
3584
3585 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3586 return -EINVAL;
3587
3588 if (request->fl_type == F_UNLCK)
3589 return nfs4_proc_unlck(state, cmd, request);
3590
3591 do {
3592 status = nfs4_proc_setlk(state, cmd, request);
3593 if ((status != -EAGAIN) || IS_SETLK(cmd))
3594 break;
3595 timeout = nfs4_set_lock_task_retry(timeout);
3596 status = -ERESTARTSYS;
3597 if (signalled())
3598 break;
3599 } while(status < 0);
1da177e4
LT		 3600 return status;
3601}
3602
888e694c
TM		 3603int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3604{
3605 struct nfs_server *server = NFS_SERVER(state->inode);
3606 struct nfs4_exception exception = { };
3607 int err;
3608
3609 err = nfs4_set_lock_state(state, fl);
3610 if (err != 0)
3611 goto out;
3612 do {
3613 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3614 if (err != -NFS4ERR_DELAY)
3615 break;
3616 err = nfs4_handle_exception(server, err, &exception);
3617 } while (exception.retry);
3618out:
3619 return err;
3620}
6b3b5496 3621
aa1870af
BF		 3622#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3623
6b3b5496
BF		 3624int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3625 size_t buflen, int flags)
3626{
4b580ee3
BF		 3627 struct inode *inode = dentry->d_inode;
3628
3629 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3630 return -EOPNOTSUPP;
3631
3632 if (!S_ISREG(inode->i_mode) &&
3633 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3634 return -EPERM;
3635
3636 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3637}
3638
3639/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3640 * and that's what we'll do for e.g. user attributes that haven't been set.
3641 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3642 * attributes in kernel-managed attribute namespaces. */
3643ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3644 size_t buflen)
3645{
aa1870af
BF		 3646 struct inode *inode = dentry->d_inode;
3647
3648 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3649 return -EOPNOTSUPP;
3650
3651 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3652}
3653
3654ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3655{
aa1870af 3656 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3657
096455a2
BF		 3658 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3659 return 0;
6b3b5496
BF		 3660 if (buf && buflen < len)
3661 return -ERANGE;
3662 if (buf)
aa1870af
BF		 3663 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3664 return len;
6b3b5496
BF		 3665}
3666
56659e99 3667int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3668 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3669{
3670 struct nfs_server *server = NFS_SERVER(dir);
3671 u32 bitmask[2] = {
361e624f
MN		 3672 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3673 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3674 };
3675 struct nfs4_fs_locations_arg args = {
3676 .dir_fh = NFS_FH(dir),
c228fd3a 3677 .name = name,
683b57b4
TM		 3678 .page = page,
3679 .bitmask = bitmask,
3680 };
3681 struct rpc_message msg = {
3682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3683 .rpc_argp = &args,
7aaa0b3b 3684 .rpc_resp = fs_locations,
683b57b4
TM		 3685 };
3686 int status;
3687
3688 dprintk("%s: start\n", __FUNCTION__);
c228fd3a 3689 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3690 fs_locations->server = server;
830b8e33 3691 fs_locations->nlocations = 0;
683b57b4
TM		 3692 status = rpc_call_sync(server->client, &msg, 0);
3693 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3694 return status;
3695}
3696
1da177e4
LT		 3697struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3698 .recover_open = nfs4_open_reclaim,
3699 .recover_lock = nfs4_lock_reclaim,
3700};
3701
3702struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3703 .recover_open = nfs4_open_expired,
3704 .recover_lock = nfs4_lock_expired,
3705};
3706
92e1d5be 3707static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3708 .permission = nfs_permission,
3709 .getattr = nfs_getattr,
3710 .setattr = nfs_setattr,
3711 .getxattr = nfs4_getxattr,
3712 .setxattr = nfs4_setxattr,
3713 .listxattr = nfs4_listxattr,
3714};
3715
509de811 3716const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3717 .version = 4, /* protocol version */
3718 .dentry_ops = &nfs4_dentry_operations,
3719 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3720 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3721 .getroot = nfs4_proc_get_root,
3722 .getattr = nfs4_proc_getattr,
3723 .setattr = nfs4_proc_setattr,
2b3de441 3724 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3725 .lookup = nfs4_proc_lookup,
3726 .access = nfs4_proc_access,
3727 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3728 .create = nfs4_proc_create,
3729 .remove = nfs4_proc_remove,
3730 .unlink_setup = nfs4_proc_unlink_setup,
3731 .unlink_done = nfs4_proc_unlink_done,
3732 .rename = nfs4_proc_rename,
3733 .link = nfs4_proc_link,
3734 .symlink = nfs4_proc_symlink,
3735 .mkdir = nfs4_proc_mkdir,
3736 .rmdir = nfs4_proc_remove,
3737 .readdir = nfs4_proc_readdir,
3738 .mknod = nfs4_proc_mknod,
3739 .statfs = nfs4_proc_statfs,
3740 .fsinfo = nfs4_proc_fsinfo,
3741 .pathconf = nfs4_proc_pathconf,
e9326dca 3742 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3743 .decode_dirent = nfs4_decode_dirent,
3744 .read_setup = nfs4_proc_read_setup,
ec06c096 3745 .read_done = nfs4_read_done,
1da177e4 3746 .write_setup = nfs4_proc_write_setup,
788e7a89 3747 .write_done = nfs4_write_done,
1da177e4 3748 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3749 .commit_done = nfs4_commit_done,
02a913a7
TM		 3750 .file_open = nfs_open,
3751 .file_release = nfs_release,
1da177e4 3752 .lock = nfs4_proc_lock,
e50a1c2e 3753 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3754};
3755
3756/*
3757 * Local variables:
3758 * c-basic-offset: 8
3759 * End:
3760 */
Linux 6.x block layer and io_uring tree(s)