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Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
[deliverable/linux.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
101070ca 54#include "internal.h"
006ea73e 55#include "iostat.h"
1da177e4
LT		 56
57#define NFSDBG_FACILITY NFSDBG_PROC
58
2066fe89 59#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 60#define NFS4_POLL_RETRY_MAX (15*HZ)
61
cdd4e68b 62struct nfs4_opendata;
864472e9 63static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 64static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
faf5f49c 65static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
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);
9936781d
TM		 68static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 70
1da177e4
LT		 71/* Prevent leaks of NFSv4 errors into userland */
72int nfs4_map_errors(int err)
73{
74 if (err < -1000) {
75 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 76 __func__, -err);
1da177e4
LT		 77 return -EIO;
78 }
79 return err;
80}
81
82/*
83 * This is our standard bitmap for GETATTR requests.
84 */
85const u32 nfs4_fattr_bitmap[2] = {
86 FATTR4_WORD0_TYPE
87 | FATTR4_WORD0_CHANGE
88 | FATTR4_WORD0_SIZE
89 | FATTR4_WORD0_FSID
90 | FATTR4_WORD0_FILEID,
91 FATTR4_WORD1_MODE
92 | FATTR4_WORD1_NUMLINKS
93 | FATTR4_WORD1_OWNER
94 | FATTR4_WORD1_OWNER_GROUP
95 | FATTR4_WORD1_RAWDEV
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
100};
101
102const u32 nfs4_statfs_bitmap[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
109};
110
4ce79717 111const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 112 FATTR4_WORD0_MAXLINK
113 | FATTR4_WORD0_MAXNAME,
114 0
115};
116
117const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME,
121 0
122};
123
830b8e33
MN		 124const u32 nfs4_fs_locations_bitmap[2] = {
125 FATTR4_WORD0_TYPE
126 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_SIZE
128 | FATTR4_WORD0_FSID
129 | FATTR4_WORD0_FILEID
130 | FATTR4_WORD0_FS_LOCATIONS,
131 FATTR4_WORD1_MODE
132 | FATTR4_WORD1_NUMLINKS
133 | FATTR4_WORD1_OWNER
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140 | FATTR4_WORD1_MOUNTED_ON_FILEID
141};
142
bc4785cd 143static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 144 struct nfs4_readdir_arg *readdir)
145{
0dbb4c67 146 __be32 *start, *p;
1da177e4
LT		 147
148 BUG_ON(readdir->count < 80);
149 if (cookie > 2) {
b7ef1956 150 readdir->cookie = cookie;
1da177e4
LT		 151 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
152 return;
153 }
154
155 readdir->cookie = 0;
156 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
157 if (cookie == 2)
158 return;
159
160 /*
161 * NFSv4 servers do not return entries for '.' and '..'
162 * Therefore, we fake these entries here. We let '.'
163 * have cookie 0 and '..' have cookie 1. Note that
164 * when talking to the server, we always send cookie 0
165 * instead of 1 or 2.
166 */
0dbb4c67 167 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 168
169 if (cookie == 0) {
170 *p++ = xdr_one; /* next */
171 *p++ = xdr_zero; /* cookie, first word */
172 *p++ = xdr_one; /* cookie, second word */
173 *p++ = xdr_one; /* entry len */
174 memcpy(p, ".\0\0\0", 4); /* entry */
175 p++;
176 *p++ = xdr_one; /* bitmap length */
177 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
178 *p++ = htonl(8); /* attribute buffer length */
4e769b93 179 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 180 }
181
182 *p++ = xdr_one; /* next */
183 *p++ = xdr_zero; /* cookie, first word */
184 *p++ = xdr_two; /* cookie, second word */
185 *p++ = xdr_two; /* entry len */
186 memcpy(p, "..\0\0", 4); /* entry */
187 p++;
188 *p++ = xdr_one; /* bitmap length */
189 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
190 *p++ = htonl(8); /* attribute buffer length */
4e769b93 191 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 192
193 readdir->pgbase = (char *)p - (char *)start;
194 readdir->count -= readdir->pgbase;
195 kunmap_atomic(start, KM_USER0);
196}
197
26e976a8 198static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 199{
7539bbab 200 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 201 spin_lock(&clp->cl_lock);
202 if (time_before(clp->cl_last_renewal,timestamp))
203 clp->cl_last_renewal = timestamp;
204 spin_unlock(&clp->cl_lock);
205}
206
38478b24 207static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 208{
38478b24 209 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 210
38478b24 211 spin_lock(&dir->i_lock);
40d24704
TM		 212 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
213 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 214 nfs_force_lookup_revalidate(dir);
40d24704 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;
c1d51931
TM		 243 p->o_res.seqid = p->o_arg.seqid;
244 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 245 p->o_res.server = p->o_arg.server;
246 nfs_fattr_init(&p->f_attr);
247 nfs_fattr_init(&p->dir_attr);
248}
249
ad389da7 250static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
e56e0b78
TM		 251 struct nfs4_state_owner *sp, int flags,
252 const struct iattr *attrs)
253{
ad389da7 254 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 255 struct inode *dir = parent->d_inode;
256 struct nfs_server *server = NFS_SERVER(dir);
257 struct nfs4_opendata *p;
258
259 p = kzalloc(sizeof(*p), GFP_KERNEL);
260 if (p == NULL)
261 goto err;
262 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
263 if (p->o_arg.seqid == NULL)
264 goto err_free;
ad389da7
TM		 265 p->path.mnt = mntget(path->mnt);
266 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 267 p->dir = parent;
268 p->owner = sp;
269 atomic_inc(&sp->so_count);
270 p->o_arg.fh = NFS_FH(dir);
271 p->o_arg.open_flags = flags,
7539bbab 272 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 273 p->o_arg.id = sp->so_owner_id.id;
ad389da7 274 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 275 p->o_arg.server = server;
276 p->o_arg.bitmask = server->attr_bitmask;
277 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 278 if (flags & O_EXCL) {
279 u32 *s = (u32 *) p->o_arg.u.verifier.data;
280 s[0] = jiffies;
281 s[1] = current->pid;
282 } else if (flags & O_CREAT) {
283 p->o_arg.u.attrs = &p->attrs;
284 memcpy(&p->attrs, attrs, sizeof(p->attrs));
285 }
cdd4e68b
TM		 286 p->c_arg.fh = &p->o_res.fh;
287 p->c_arg.stateid = &p->o_res.stateid;
288 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 289 nfs4_init_opendata_res(p);
c6d00e63 290 kref_init(&p->kref);
e56e0b78
TM		 291 return p;
292err_free:
293 kfree(p);
294err:
295 dput(parent);
296 return NULL;
297}
298
c6d00e63 299static void nfs4_opendata_free(struct kref *kref)
e56e0b78 300{
c6d00e63
TM		 301 struct nfs4_opendata *p = container_of(kref,
302 struct nfs4_opendata, kref);
303
304 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 305 if (p->state != NULL)
306 nfs4_put_open_state(p->state);
c6d00e63
TM		 307 nfs4_put_state_owner(p->owner);
308 dput(p->dir);
31f31db1 309 path_put(&p->path);
c6d00e63
TM		 310 kfree(p);
311}
312
313static void nfs4_opendata_put(struct nfs4_opendata *p)
314{
315 if (p != NULL)
316 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 317}
318
06f814a3
TM		 319static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
320{
06f814a3
TM		 321 int ret;
322
06f814a3 323 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 324 return ret;
325}
326
6ee41268
TM		 327static int can_open_cached(struct nfs4_state *state, int mode)
328{
329 int ret = 0;
330 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
331 case FMODE_READ:
332 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 333 break;
334 case FMODE_WRITE:
335 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 336 break;
337 case FMODE_READ|FMODE_WRITE:
338 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
339 }
340 return ret;
341}
342
aac00a8d
TM		 343static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
344{
345 if ((delegation->type & open_flags) != open_flags)
346 return 0;
347 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
348 return 0;
349 return 1;
350}
351
003707c7 352static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
e7616923
TM		 353{
354 switch (open_flags) {
355 case FMODE_WRITE:
356 state->n_wronly++;
357 break;
358 case FMODE_READ:
359 state->n_rdonly++;
360 break;
361 case FMODE_READ|FMODE_WRITE:
362 state->n_rdwr++;
363 }
003707c7
TM		 364 nfs4_state_set_mode_locked(state, state->state | open_flags);
365}
366
367static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
368{
369 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
370 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
371 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
372 switch (open_flags) {
373 case FMODE_READ:
374 set_bit(NFS_O_RDONLY_STATE, &state->flags);
375 break;
376 case FMODE_WRITE:
377 set_bit(NFS_O_WRONLY_STATE, &state->flags);
378 break;
379 case FMODE_READ|FMODE_WRITE:
380 set_bit(NFS_O_RDWR_STATE, &state->flags);
381 }
e7616923
TM		 382}
383
003707c7
TM		 384static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
385{
8bda4e4c 386 write_seqlock(&state->seqlock);
003707c7 387 nfs_set_open_stateid_locked(state, stateid, open_flags);
8bda4e4c 388 write_sequnlock(&state->seqlock);
003707c7
TM		 389}
390
391static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
1da177e4 392{
1da177e4 393 open_flags &= (FMODE_READ|FMODE_WRITE);
8bda4e4c
TM		 394 /*
395 * Protect the call to nfs4_state_set_mode_locked and
396 * serialise the stateid update
397 */
398 write_seqlock(&state->seqlock);
003707c7
TM		 399 if (deleg_stateid != NULL) {
400 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
401 set_bit(NFS_DELEGATED_STATE, &state->flags);
402 }
403 if (open_stateid != NULL)
404 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
8bda4e4c
TM		 405 write_sequnlock(&state->seqlock);
406 spin_lock(&state->owner->so_lock);
e7616923 407 update_open_stateflags(state, open_flags);
ec073428 408 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 409}
410
aac00a8d
TM		 411static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
412{
413 struct nfs_delegation *delegation;
414
415 rcu_read_lock();
416 delegation = rcu_dereference(NFS_I(inode)->delegation);
417 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
418 rcu_read_unlock();
419 return;
420 }
421 rcu_read_unlock();
422 nfs_inode_return_delegation(inode);
423}
424
6ee41268 425static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 426{
427 struct nfs4_state *state = opendata->state;
428 struct nfs_inode *nfsi = NFS_I(state->inode);
429 struct nfs_delegation *delegation;
430 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
431 nfs4_stateid stateid;
432 int ret = -EAGAIN;
433
434 rcu_read_lock();
435 delegation = rcu_dereference(nfsi->delegation);
aac00a8d 436 for (;;) {
6ee41268
TM		 437 if (can_open_cached(state, open_mode)) {
438 spin_lock(&state->owner->so_lock);
439 if (can_open_cached(state, open_mode)) {
440 update_open_stateflags(state, open_mode);
441 spin_unlock(&state->owner->so_lock);
442 rcu_read_unlock();
443 goto out_return_state;
444 }
445 spin_unlock(&state->owner->so_lock);
446 }
447 if (delegation == NULL)
448 break;
aac00a8d
TM		 449 if (!can_open_delegated(delegation, open_mode))
450 break;
451 /* Save the delegation */
452 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
453 rcu_read_unlock();
454 lock_kernel();
af22f94a 455 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 456 unlock_kernel();
457 if (ret != 0)
458 goto out;
459 ret = -EAGAIN;
460 rcu_read_lock();
461 delegation = rcu_dereference(nfsi->delegation);
6ee41268 462 /* If no delegation, try a cached open */
aac00a8d 463 if (delegation == NULL)
6ee41268 464 continue;
aac00a8d
TM		 465 /* Is the delegation still valid? */
466 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
467 continue;
468 rcu_read_unlock();
469 update_open_stateid(state, NULL, &stateid, open_mode);
470 goto out_return_state;
471 }
aac00a8d
TM		 472 rcu_read_unlock();
473out:
474 return ERR_PTR(ret);
475out_return_state:
476 atomic_inc(&state->count);
477 return state;
478}
479
24ac23ab
TM		 480static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
481{
482 struct inode *inode;
483 struct nfs4_state *state = NULL;
003707c7
TM		 484 struct nfs_delegation *delegation;
485 nfs4_stateid *deleg_stateid = NULL;
1b370bc2 486 int ret;
24ac23ab 487
aac00a8d 488 if (!data->rpc_done) {
6ee41268 489 state = nfs4_try_open_cached(data);
aac00a8d
TM		 490 goto out;
491 }
492
1b370bc2 493 ret = -EAGAIN;
24ac23ab 494 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 495 goto err;
24ac23ab 496 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 497 ret = PTR_ERR(inode);
03f28e3a 498 if (IS_ERR(inode))
1b370bc2
TM		 499 goto err;
500 ret = -ENOMEM;
24ac23ab
TM		 501 state = nfs4_get_open_state(inode, data->owner);
502 if (state == NULL)
1b370bc2 503 goto err_put_inode;
549d6ed5 504 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 505 int delegation_flags = 0;
506
003707c7
TM		 507 rcu_read_lock();
508 delegation = rcu_dereference(NFS_I(inode)->delegation);
509 if (delegation)
510 delegation_flags = delegation->flags;
511 rcu_read_unlock();
549d6ed5
TM		 512 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
513 nfs_inode_set_delegation(state->inode,
514 data->owner->so_cred,
515 &data->o_res);
516 else
517 nfs_inode_reclaim_delegation(state->inode,
518 data->owner->so_cred,
519 &data->o_res);
520 }
003707c7
TM		 521 rcu_read_lock();
522 delegation = rcu_dereference(NFS_I(inode)->delegation);
523 if (delegation != NULL)
524 deleg_stateid = &delegation->stateid;
525 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
526 rcu_read_unlock();
24ac23ab 527 iput(inode);
aac00a8d 528out:
24ac23ab 529 return state;
1b370bc2
TM		 530err_put_inode:
531 iput(inode);
532err:
533 return ERR_PTR(ret);
24ac23ab
TM		 534}
535
864472e9
TM		 536static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
537{
538 struct nfs_inode *nfsi = NFS_I(state->inode);
539 struct nfs_open_context *ctx;
540
541 spin_lock(&state->inode->i_lock);
542 list_for_each_entry(ctx, &nfsi->open_files, list) {
543 if (ctx->state != state)
544 continue;
545 get_nfs_open_context(ctx);
546 spin_unlock(&state->inode->i_lock);
547 return ctx;
548 }
549 spin_unlock(&state->inode->i_lock);
550 return ERR_PTR(-ENOENT);
551}
552
6f220ed5
TM		 553static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
554{
555 struct nfs4_opendata *opendata;
556
557 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
558 if (opendata == NULL)
559 return ERR_PTR(-ENOMEM);
560 opendata->state = state;
561 atomic_inc(&state->count);
562 return opendata;
563}
564
2ced46c2 565static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
864472e9 566{
2ced46c2 567 struct nfs4_state *newstate;
864472e9
TM		 568 int ret;
569
570 opendata->o_arg.open_flags = openflags;
2ced46c2
TM		 571 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
572 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
573 nfs4_init_opendata_res(opendata);
864472e9
TM		 574 ret = _nfs4_proc_open(opendata);
575 if (ret != 0)
576 return ret;
2ced46c2 577 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 578 if (IS_ERR(newstate))
579 return PTR_ERR(newstate);
580 nfs4_close_state(&opendata->path, newstate, openflags);
2ced46c2 581 *res = newstate;
864472e9
TM		 582 return 0;
583}
584
585static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
586{
864472e9 587 struct nfs4_state *newstate;
864472e9
TM		 588 int ret;
589
590 /* memory barrier prior to reading state->n_* */
2ced46c2 591 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 592 smp_rmb();
593 if (state->n_rdwr != 0) {
2ced46c2 594 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 595 if (ret != 0)
596 return ret;
2ced46c2
TM		 597 if (newstate != state)
598 return -ESTALE;
864472e9
TM		 599 }
600 if (state->n_wronly != 0) {
2ced46c2 601 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 602 if (ret != 0)
603 return ret;
2ced46c2
TM		 604 if (newstate != state)
605 return -ESTALE;
864472e9
TM		 606 }
607 if (state->n_rdonly != 0) {
2ced46c2 608 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 609 if (ret != 0)
610 return ret;
2ced46c2
TM		 611 if (newstate != state)
612 return -ESTALE;
864472e9 613 }
1ac7e2fd
TM		 614 /*
615 * We may have performed cached opens for all three recoveries.
616 * Check if we need to update the current stateid.
617 */
618 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
619 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 620 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 621 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
622 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 623 write_sequnlock(&state->seqlock);
1ac7e2fd 624 }
864472e9
TM		 625 return 0;
626}
627
1da177e4
LT		 628/*
629 * OPEN_RECLAIM:
630 * reclaim state on the server after a reboot.
1da177e4 631 */
539cd03a 632static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 633{
1ac7e2fd 634 struct nfs_delegation *delegation;
864472e9
TM		 635 struct nfs4_opendata *opendata;
636 int delegation_type = 0;
1da177e4
LT		 637 int status;
638
6f220ed5
TM		 639 opendata = nfs4_open_recoverdata_alloc(ctx, state);
640 if (IS_ERR(opendata))
641 return PTR_ERR(opendata);
864472e9
TM		 642 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
643 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 644 rcu_read_lock();
645 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
646 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
65bbf6bd 647 delegation_type = delegation->type;
1ac7e2fd 648 rcu_read_unlock();
864472e9
TM		 649 opendata->o_arg.u.delegation_type = delegation_type;
650 status = nfs4_open_recover(opendata, state);
c6d00e63 651 nfs4_opendata_put(opendata);
1da177e4
LT		 652 return status;
653}
654
539cd03a 655static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 656{
657 struct nfs_server *server = NFS_SERVER(state->inode);
658 struct nfs4_exception exception = { };
659 int err;
660 do {
539cd03a 661 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 662 if (err != -NFS4ERR_DELAY)
663 break;
664 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 665 } while (exception.retry);
666 return err;
667}
668
864472e9
TM		 669static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
670{
671 struct nfs_open_context *ctx;
672 int ret;
673
674 ctx = nfs4_state_find_open_context(state);
675 if (IS_ERR(ctx))
676 return PTR_ERR(ctx);
539cd03a 677 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 678 put_nfs_open_context(ctx);
679 return ret;
680}
681
13437e12 682static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 683{
e56e0b78 684 struct nfs4_opendata *opendata;
864472e9 685 int ret;
1da177e4 686
6f220ed5
TM		 687 opendata = nfs4_open_recoverdata_alloc(ctx, state);
688 if (IS_ERR(opendata))
689 return PTR_ERR(opendata);
e56e0b78 690 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 691 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 692 sizeof(opendata->o_arg.u.delegation.data));
864472e9 693 ret = nfs4_open_recover(opendata, state);
c6d00e63 694 nfs4_opendata_put(opendata);
864472e9 695 return ret;
1da177e4
LT		 696}
697
13437e12 698int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 699{
700 struct nfs4_exception exception = { };
539cd03a 701 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 702 int err;
703 do {
13437e12 704 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 705 switch (err) {
706 case 0:
707 return err;
708 case -NFS4ERR_STALE_CLIENTID:
709 case -NFS4ERR_STALE_STATEID:
710 case -NFS4ERR_EXPIRED:
711 /* Don't recall a delegation if it was lost */
7539bbab 712 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 713 return err;
714 }
715 err = nfs4_handle_exception(server, err, &exception);
716 } while (exception.retry);
717 return err;
718}
719
cdd4e68b
TM		 720static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
721{
722 struct nfs4_opendata *data = calldata;
723
724 data->rpc_status = task->tk_status;
725 if (RPC_ASSASSINATED(task))
726 return;
26e976a8 727 if (data->rpc_status == 0) {
cdd4e68b
TM		 728 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
729 sizeof(data->o_res.stateid.data));
bb22629e 730 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 731 renew_lease(data->o_res.server, data->timestamp);
3e309914 732 data->rpc_done = 1;
26e976a8 733 }
cdd4e68b
TM		 734}
735
736static void nfs4_open_confirm_release(void *calldata)
737{
738 struct nfs4_opendata *data = calldata;
739 struct nfs4_state *state = NULL;
740
741 /* If this request hasn't been cancelled, do nothing */
742 if (data->cancelled == 0)
743 goto out_free;
744 /* In case of error, no cleanup! */
3e309914 745 if (!data->rpc_done)
cdd4e68b 746 goto out_free;
cdd4e68b 747 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 748 if (!IS_ERR(state))
4a35bd41 749 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
cdd4e68b 750out_free:
c6d00e63 751 nfs4_opendata_put(data);
cdd4e68b
TM		 752}
753
754static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 755 .rpc_call_done = nfs4_open_confirm_done,
756 .rpc_release = nfs4_open_confirm_release,
757};
758
759/*
760 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
761 */
762static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
763{
764 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
765 struct rpc_task *task;
5138fde0
TM		 766 struct rpc_message msg = {
767 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
768 .rpc_argp = &data->c_arg,
769 .rpc_resp = &data->c_res,
770 .rpc_cred = data->owner->so_cred,
771 };
c970aa85
TM		 772 struct rpc_task_setup task_setup_data = {
773 .rpc_client = server->client,
5138fde0 774 .rpc_message = &msg,
c970aa85
TM		 775 .callback_ops = &nfs4_open_confirm_ops,
776 .callback_data = data,
101070ca 777 .workqueue = nfsiod_workqueue,
c970aa85
TM		 778 .flags = RPC_TASK_ASYNC,
779 };
1da177e4
LT		 780 int status;
781
c6d00e63 782 kref_get(&data->kref);
3e309914
TM		 783 data->rpc_done = 0;
784 data->rpc_status = 0;
5138fde0 785 data->timestamp = jiffies;
c970aa85 786 task = rpc_run_task(&task_setup_data);
7a1218a2 787 if (IS_ERR(task))
cdd4e68b 788 return PTR_ERR(task);
cdd4e68b
TM		 789 status = nfs4_wait_for_completion_rpc_task(task);
790 if (status != 0) {
791 data->cancelled = 1;
792 smp_wmb();
793 } else
794 status = data->rpc_status;
e6b3c4db 795 rpc_put_task(task);
1da177e4
LT		 796 return status;
797}
798
24ac23ab 799static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 800{
24ac23ab
TM		 801 struct nfs4_opendata *data = calldata;
802 struct nfs4_state_owner *sp = data->owner;
5138fde0 803
24ac23ab
TM		 804 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
805 return;
aac00a8d
TM		 806 /*
807 * Check if we still need to send an OPEN call, or if we can use
808 * a delegation instead.
809 */
810 if (data->state != NULL) {
811 struct nfs_delegation *delegation;
812
6ee41268
TM		 813 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
814 goto out_no_action;
aac00a8d
TM		 815 rcu_read_lock();
816 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
817 if (delegation != NULL &&
818 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
819 rcu_read_unlock();
6ee41268 820 goto out_no_action;
aac00a8d
TM		 821 }
822 rcu_read_unlock();
823 }
24ac23ab 824 /* Update sequence id. */
9f958ab8 825 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 826 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 827 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 828 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 829 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
830 }
26e976a8 831 data->timestamp = jiffies;
5138fde0 832 rpc_call_start(task);
6ee41268
TM		 833 return;
834out_no_action:
835 task->tk_action = NULL;
836
24ac23ab 837}
1da177e4 838
24ac23ab
TM		 839static void nfs4_open_done(struct rpc_task *task, void *calldata)
840{
841 struct nfs4_opendata *data = calldata;
1da177e4 842
24ac23ab
TM		 843 data->rpc_status = task->tk_status;
844 if (RPC_ASSASSINATED(task))
845 return;
846 if (task->tk_status == 0) {
847 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 848 case S_IFREG:
849 break;
850 case S_IFLNK:
24ac23ab 851 data->rpc_status = -ELOOP;
6f926b5b
TM		 852 break;
853 case S_IFDIR:
24ac23ab 854 data->rpc_status = -EISDIR;
6f926b5b
TM		 855 break;
856 default:
24ac23ab 857 data->rpc_status = -ENOTDIR;
6f926b5b 858 }
26e976a8 859 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 860 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
861 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 862 }
3e309914 863 data->rpc_done = 1;
24ac23ab 864}
6f926b5b 865
24ac23ab
TM		 866static void nfs4_open_release(void *calldata)
867{
868 struct nfs4_opendata *data = calldata;
869 struct nfs4_state *state = NULL;
870
871 /* If this request hasn't been cancelled, do nothing */
872 if (data->cancelled == 0)
873 goto out_free;
874 /* In case of error, no cleanup! */
3e309914 875 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 876 goto out_free;
877 /* In case we need an open_confirm, no cleanup! */
878 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
879 goto out_free;
24ac23ab 880 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 881 if (!IS_ERR(state))
4a35bd41 882 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
24ac23ab 883out_free:
c6d00e63 884 nfs4_opendata_put(data);
24ac23ab
TM		 885}
886
887static const struct rpc_call_ops nfs4_open_ops = {
888 .rpc_call_prepare = nfs4_open_prepare,
889 .rpc_call_done = nfs4_open_done,
890 .rpc_release = nfs4_open_release,
891};
892
893/*
894 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
895 */
896static int _nfs4_proc_open(struct nfs4_opendata *data)
897{
898 struct inode *dir = data->dir->d_inode;
899 struct nfs_server *server = NFS_SERVER(dir);
900 struct nfs_openargs *o_arg = &data->o_arg;
901 struct nfs_openres *o_res = &data->o_res;
902 struct rpc_task *task;
5138fde0
TM		 903 struct rpc_message msg = {
904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
905 .rpc_argp = o_arg,
906 .rpc_resp = o_res,
907 .rpc_cred = data->owner->so_cred,
908 };
c970aa85
TM		 909 struct rpc_task_setup task_setup_data = {
910 .rpc_client = server->client,
5138fde0 911 .rpc_message = &msg,
c970aa85
TM		 912 .callback_ops = &nfs4_open_ops,
913 .callback_data = data,
101070ca 914 .workqueue = nfsiod_workqueue,
c970aa85
TM		 915 .flags = RPC_TASK_ASYNC,
916 };
24ac23ab
TM		 917 int status;
918
c6d00e63 919 kref_get(&data->kref);
3e309914
TM		 920 data->rpc_done = 0;
921 data->rpc_status = 0;
2ced46c2 922 data->cancelled = 0;
c970aa85 923 task = rpc_run_task(&task_setup_data);
7a1218a2 924 if (IS_ERR(task))
24ac23ab 925 return PTR_ERR(task);
24ac23ab
TM		 926 status = nfs4_wait_for_completion_rpc_task(task);
927 if (status != 0) {
928 data->cancelled = 1;
929 smp_wmb();
930 } else
931 status = data->rpc_status;
e6b3c4db 932 rpc_put_task(task);
3e309914 933 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 934 return status;
935
9936781d
TM		 936 if (o_res->fh.size == 0)
937 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
938
56ae19f3
TM		 939 if (o_arg->open_flags & O_CREAT) {
940 update_changeattr(dir, &o_res->cinfo);
941 nfs_post_op_update_inode(dir, o_res->dir_attr);
942 } else
943 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 944 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 945 status = _nfs4_proc_open_confirm(data);
1da177e4 946 if (status != 0)
24ac23ab 947 return status;
1da177e4
LT		 948 }
949 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 950 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 951 return 0;
1da177e4
LT		 952}
953
10afec90 954static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 955{
7539bbab 956 struct nfs_client *clp = server->nfs_client;
6b30954e 957 int ret;
58d9714a 958
6b30954e
TM		 959 for (;;) {
960 ret = nfs4_wait_clnt_recover(server->client, clp);
961 if (ret != 0)
962 return ret;
963 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
964 break;
58d9714a 965 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 966 }
967 return 0;
58d9714a
TM		 968}
969
1da177e4
LT		 970/*
971 * OPEN_EXPIRED:
972 * reclaim state on the server after a network partition.
973 * Assumes caller holds the appropriate lock
974 */
539cd03a 975static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 976{
e56e0b78 977 struct nfs4_opendata *opendata;
864472e9 978 int ret;
1da177e4 979
6f220ed5
TM		 980 opendata = nfs4_open_recoverdata_alloc(ctx, state);
981 if (IS_ERR(opendata))
982 return PTR_ERR(opendata);
864472e9 983 ret = nfs4_open_recover(opendata, state);
35d05778 984 if (ret == -ESTALE)
539cd03a 985 d_drop(ctx->path.dentry);
c6d00e63 986 nfs4_opendata_put(opendata);
864472e9 987 return ret;
1da177e4
LT		 988}
989
539cd03a 990static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 991{
539cd03a 992 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 993 struct nfs4_exception exception = { };
994 int err;
995
996 do {
539cd03a 997 err = _nfs4_open_expired(ctx, state);
202b50dc
TM		 998 if (err == -NFS4ERR_DELAY)
999 nfs4_handle_exception(server, err, &exception);
1000 } while (exception.retry);
1001 return err;
1002}
1003
1da177e4
LT		 1004static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1005{
1da177e4 1006 struct nfs_open_context *ctx;
864472e9 1007 int ret;
1da177e4 1008
864472e9
TM		 1009 ctx = nfs4_state_find_open_context(state);
1010 if (IS_ERR(ctx))
1011 return PTR_ERR(ctx);
539cd03a 1012 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1013 put_nfs_open_context(ctx);
1014 return ret;
1da177e4
LT		 1015}
1016
aa53ed54
JL		 1017/*
1018 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1019 * fields corresponding to attributes that were used to store the verifier.
1020 * Make sure we clobber those fields in the later setattr call
1021 */
1022static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1023{
1024 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1025 !(sattr->ia_valid & ATTR_ATIME_SET))
1026 sattr->ia_valid |= ATTR_ATIME;
1027
1028 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1029 !(sattr->ia_valid & ATTR_MTIME_SET))
1030 sattr->ia_valid |= ATTR_MTIME;
1031}
1032
1da177e4 1033/*
24ac23ab 1034 * Returns a referenced nfs4_state
1da177e4 1035 */
ad389da7 1036static 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		 1037{
1038 struct nfs4_state_owner *sp;
1039 struct nfs4_state *state = NULL;
1040 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 1041 struct nfs_client *clp = server->nfs_client;
e56e0b78 1042 struct nfs4_opendata *opendata;
aac00a8d 1043 int status;
1da177e4
LT		 1044
1045 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1046 status = -ENOMEM;
1047 if (!(sp = nfs4_get_state_owner(server, cred))) {
1048 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1049 goto out_err;
1050 }
58d9714a
TM		 1051 status = nfs4_recover_expired_lease(server);
1052 if (status != 0)
b4454fe1 1053 goto err_put_state_owner;
aac00a8d
TM		 1054 if (path->dentry->d_inode != NULL)
1055 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
58d9714a
TM		 1056 down_read(&clp->cl_sem);
1057 status = -ENOMEM;
ad389da7 1058 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
e56e0b78 1059 if (opendata == NULL)
76723de0 1060 goto err_release_rwsem;
1da177e4 1061
aac00a8d
TM		 1062 if (path->dentry->d_inode != NULL)
1063 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1064
24ac23ab 1065 status = _nfs4_proc_open(opendata);
1da177e4 1066 if (status != 0)
c6d00e63 1067 goto err_opendata_put;
1da177e4 1068
aa53ed54
JL		 1069 if (opendata->o_arg.open_flags & O_EXCL)
1070 nfs4_exclusive_attrset(opendata, sattr);
1071
24ac23ab 1072 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1073 status = PTR_ERR(state);
1074 if (IS_ERR(state))
c6d00e63 1075 goto err_opendata_put;
c6d00e63 1076 nfs4_opendata_put(opendata);
1da177e4
LT		 1077 nfs4_put_state_owner(sp);
1078 up_read(&clp->cl_sem);
1079 *res = state;
1080 return 0;
c6d00e63
TM		 1081err_opendata_put:
1082 nfs4_opendata_put(opendata);
76723de0
TM		 1083err_release_rwsem:
1084 up_read(&clp->cl_sem);
e56e0b78
TM		 1085err_put_state_owner:
1086 nfs4_put_state_owner(sp);
1da177e4 1087out_err:
1da177e4
LT		 1088 *res = NULL;
1089 return status;
1090}
1091
1092
ad389da7 1093static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1094{
1095 struct nfs4_exception exception = { };
1096 struct nfs4_state *res;
1097 int status;
1098
1099 do {
ad389da7 1100 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1da177e4
LT		 1101 if (status == 0)
1102 break;
1103 /* NOTE: BAD_SEQID means the server and client disagree about the
1104 * book-keeping w.r.t. state-changing operations
1105 * (OPEN/CLOSE/LOCK/LOCKU...)
1106 * It is actually a sign of a bug on the client or on the server.
1107 *
1108 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1109 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1110 * have unhashed the old state_owner for us, and that we can
1111 * therefore safely retry using a new one. We should still warn
1112 * the user though...
1113 */
1114 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1115 printk(KERN_WARNING "NFS: v4 server %s "
1116 " returned a bad sequence-id error!\n",
1117 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1118 exception.retry = 1;
1119 continue;
1120 }
550f5747
TM		 1121 /*
1122 * BAD_STATEID on OPEN means that the server cancelled our
1123 * state before it received the OPEN_CONFIRM.
1124 * Recover by retrying the request as per the discussion
1125 * on Page 181 of RFC3530.
1126 */
1127 if (status == -NFS4ERR_BAD_STATEID) {
1128 exception.retry = 1;
1129 continue;
1130 }
aac00a8d
TM		 1131 if (status == -EAGAIN) {
1132 /* We must have found a delegation */
1133 exception.retry = 1;
1134 continue;
1135 }
1da177e4
LT		 1136 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1137 status, &exception));
1138 } while (exception.retry);
1139 return res;
1140}
1141
3e4f6290
TM		 1142static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1143 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1144{
3e4f6290 1145 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1146 struct nfs_setattrargs arg = {
3e4f6290 1147 .fh = NFS_FH(inode),
1da177e4
LT		 1148 .iap = sattr,
1149 .server = server,
1150 .bitmask = server->attr_bitmask,
1151 };
1152 struct nfs_setattrres res = {
1153 .fattr = fattr,
1154 .server = server,
1155 };
1156 struct rpc_message msg = {
1157 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1158 .rpc_argp = &arg,
1159 .rpc_resp = &res,
1160 };
26e976a8 1161 unsigned long timestamp = jiffies;
65e4308d 1162 int status;
1da177e4 1163
0e574af1 1164 nfs_fattr_init(fattr);
1da177e4 1165
3e4f6290
TM		 1166 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1167 /* Use that stateid */
1168 } else if (state != NULL) {
1da177e4 1169 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1170 nfs4_copy_stateid(&arg.stateid, state, current->files);
1171 } else
1da177e4
LT		 1172 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1173
65e4308d 1174 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1175 if (status == 0 && state != NULL)
1176 renew_lease(server, timestamp);
65e4308d 1177 return status;
1da177e4
LT		 1178}
1179
3e4f6290
TM		 1180static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1181 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1182{
3e4f6290 1183 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1184 struct nfs4_exception exception = { };
1185 int err;
1186 do {
1187 err = nfs4_handle_exception(server,
3e4f6290 1188 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1189 &exception);
1190 } while (exception.retry);
1191 return err;
1192}
1193
1194struct nfs4_closedata {
4a35bd41 1195 struct path path;
1da177e4
LT		 1196 struct inode *inode;
1197 struct nfs4_state *state;
1198 struct nfs_closeargs arg;
1199 struct nfs_closeres res;
516a6af6 1200 struct nfs_fattr fattr;
26e976a8 1201 unsigned long timestamp;
1da177e4
LT		 1202};
1203
963d8fe5 1204static void nfs4_free_closedata(void *data)
9512135d 1205{
963d8fe5
TM		 1206 struct nfs4_closedata *calldata = data;
1207 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1208
1209 nfs4_put_open_state(calldata->state);
1210 nfs_free_seqid(calldata->arg.seqid);
9512135d 1211 nfs4_put_state_owner(sp);
31f31db1 1212 path_put(&calldata->path);
9512135d
TM		 1213 kfree(calldata);
1214}
1215
963d8fe5 1216static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1217{
963d8fe5 1218 struct nfs4_closedata *calldata = data;
1da177e4 1219 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1220 struct nfs_server *server = NFS_SERVER(calldata->inode);
1221
4ce70ada
TM		 1222 if (RPC_ASSASSINATED(task))
1223 return;
1da177e4
LT		 1224 /* hmm. we are done with the inode, and in the process of freeing
1225 * the state_owner. we keep this around to process errors
1226 */
1da177e4
LT		 1227 switch (task->tk_status) {
1228 case 0:
45328c35 1229 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1230 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1231 break;
1232 case -NFS4ERR_STALE_STATEID:
1233 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1234 break;
1235 default:
1236 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1237 rpc_restart_call(task);
1238 return;
1239 }
1240 }
516a6af6 1241 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1242}
1243
4ce70ada 1244static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1245{
4ce70ada 1246 struct nfs4_closedata *calldata = data;
9512135d 1247 struct nfs4_state *state = calldata->state;
003707c7 1248 int clear_rd, clear_wr, clear_rdwr;
9512135d 1249
963d8fe5 1250 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1251 return;
003707c7 1252
003707c7 1253 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1254 spin_lock(&state->owner->so_lock);
003707c7 1255 /* Calculate the change in open mode */
e7616923 1256 if (state->n_rdwr == 0) {
003707c7 1257 if (state->n_rdonly == 0) {
003707c7
TM		 1258 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1259 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1260 }
1261 if (state->n_wronly == 0) {
003707c7
TM		 1262 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1263 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1264 }
e7616923 1265 }
4cecb76f 1266 spin_unlock(&state->owner->so_lock);
003707c7 1267 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1268 /* Note: exit _without_ calling nfs4_close_done */
1269 task->tk_action = NULL;
9512135d
TM		 1270 return;
1271 }
516a6af6 1272 nfs_fattr_init(calldata->res.fattr);
45328c35 1273 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1274 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1275 calldata->arg.open_flags = FMODE_READ;
1276 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1277 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1278 calldata->arg.open_flags = FMODE_WRITE;
1279 }
26e976a8 1280 calldata->timestamp = jiffies;
5138fde0 1281 rpc_call_start(task);
1da177e4
LT		 1282}
1283
963d8fe5 1284static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1285 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1286 .rpc_call_done = nfs4_close_done,
1287 .rpc_release = nfs4_free_closedata,
1288};
1289
1da177e4
LT		 1290/*
1291 * It is possible for data to be read/written from a mem-mapped file
1292 * after the sys_close call (which hits the vfs layer as a flush).
1293 * This means that we can't safely call nfsv4 close on a file until
1294 * the inode is cleared. This in turn means that we are not good
1295 * NFSv4 citizens - we do not indicate to the server to update the file's
1296 * share state even when we are done with one of the three share
1297 * stateid's in the inode.
1298 *
1299 * NOTE: Caller must be holding the sp->so_owner semaphore!
1300 */
a49c3c77 1301int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1302{
4a35bd41 1303 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1304 struct nfs4_closedata *calldata;
b39e625b
TM		 1305 struct nfs4_state_owner *sp = state->owner;
1306 struct rpc_task *task;
5138fde0
TM		 1307 struct rpc_message msg = {
1308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1309 .rpc_cred = state->owner->so_cred,
1310 };
c970aa85
TM		 1311 struct rpc_task_setup task_setup_data = {
1312 .rpc_client = server->client,
5138fde0 1313 .rpc_message = &msg,
c970aa85 1314 .callback_ops = &nfs4_close_ops,
101070ca 1315 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1316 .flags = RPC_TASK_ASYNC,
1317 };
9512135d 1318 int status = -ENOMEM;
1da177e4 1319
9512135d 1320 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1321 if (calldata == NULL)
9512135d 1322 goto out;
4a35bd41 1323 calldata->inode = state->inode;
1da177e4 1324 calldata->state = state;
4a35bd41 1325 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1326 calldata->arg.stateid = &state->open_stateid;
1da177e4 1327 /* Serialization for the sequence id */
cee54fc9 1328 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1329 if (calldata->arg.seqid == NULL)
1330 goto out_free_calldata;
516a6af6
TM		 1331 calldata->arg.bitmask = server->attr_bitmask;
1332 calldata->res.fattr = &calldata->fattr;
c1d51931 1333 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1334 calldata->res.server = server;
4a35bd41
TM		 1335 calldata->path.mnt = mntget(path->mnt);
1336 calldata->path.dentry = dget(path->dentry);
9512135d 1337
5138fde0
TM		 1338 msg.rpc_argp = &calldata->arg,
1339 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1340 task_setup_data.callback_data = calldata;
1341 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1342 if (IS_ERR(task))
1343 return PTR_ERR(task);
a49c3c77
TM		 1344 status = 0;
1345 if (wait)
1346 status = rpc_wait_for_completion_task(task);
b39e625b 1347 rpc_put_task(task);
a49c3c77 1348 return status;
9512135d
TM		 1349out_free_calldata:
1350 kfree(calldata);
1351out:
b39e625b
TM		 1352 nfs4_put_open_state(state);
1353 nfs4_put_state_owner(sp);
9512135d 1354 return status;
1da177e4
LT		 1355}
1356
4a35bd41 1357static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM		 1358{
1359 struct file *filp;
1b45c46c 1360 int ret;
02a913a7 1361
1b45c46c
TM		 1362 /* If the open_intent is for execute, we have an extra check to make */
1363 if (nd->intent.open.flags & FMODE_EXEC) {
af22f94a 1364 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1365 state->owner->so_cred,
1366 nd->intent.open.flags);
1367 if (ret < 0)
1368 goto out_close;
1369 }
4a35bd41 1370 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1371 if (!IS_ERR(filp)) {
1372 struct nfs_open_context *ctx;
cd3758e3 1373 ctx = nfs_file_open_context(filp);
02a913a7 1374 ctx->state = state;
95cf959b
TM		 1375 return 0;
1376 }
1b45c46c
TM		 1377 ret = PTR_ERR(filp);
1378out_close:
a49c3c77 1379 nfs4_close_sync(path, state, nd->intent.open.flags);
1b45c46c 1380 return ret;
02a913a7
TM		 1381}
1382
1383struct dentry *
1da177e4
LT		 1384nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1385{
ad389da7 1386 struct path path = {
4ac91378 1387 .mnt = nd->path.mnt,
ad389da7
TM		 1388 .dentry = dentry,
1389 };
4ac91378 1390 struct dentry *parent;
1da177e4
LT		 1391 struct iattr attr;
1392 struct rpc_cred *cred;
1393 struct nfs4_state *state;
02a913a7 1394 struct dentry *res;
1da177e4
LT		 1395
1396 if (nd->flags & LOOKUP_CREATE) {
1397 attr.ia_mode = nd->intent.open.create_mode;
1398 attr.ia_valid = ATTR_MODE;
1399 if (!IS_POSIXACL(dir))
1400 attr.ia_mode &= ~current->fs->umask;
1401 } else {
1402 attr.ia_valid = 0;
1403 BUG_ON(nd->intent.open.flags & O_CREAT);
1404 }
1405
98a8e323 1406 cred = rpc_lookup_cred();
1da177e4 1407 if (IS_ERR(cred))
02a913a7 1408 return (struct dentry *)cred;
565277f6
TM		 1409 parent = dentry->d_parent;
1410 /* Protect against concurrent sillydeletes */
1411 nfs_block_sillyrename(parent);
ad389da7 1412 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1413 put_rpccred(cred);
02a913a7 1414 if (IS_ERR(state)) {
d75340cc 1415 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1416 d_add(dentry, NULL);
d75340cc
TM		 1417 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1418 }
565277f6 1419 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1420 return (struct dentry *)state;
1421 }
24ac23ab 1422 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1423 if (res != NULL)
deee9369 1424 path.dentry = res;
d75340cc 1425 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1426 nfs_unblock_sillyrename(parent);
4a35bd41 1427 nfs4_intent_set_file(nd, &path, state);
02a913a7 1428 return res;
1da177e4
LT		 1429}
1430
1431int
02a913a7 1432nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1433{
ad389da7 1434 struct path path = {
4ac91378 1435 .mnt = nd->path.mnt,
ad389da7
TM		 1436 .dentry = dentry,
1437 };
1da177e4
LT		 1438 struct rpc_cred *cred;
1439 struct nfs4_state *state;
1da177e4 1440
98a8e323 1441 cred = rpc_lookup_cred();
1da177e4
LT		 1442 if (IS_ERR(cred))
1443 return PTR_ERR(cred);
aac00a8d 1444 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1445 put_rpccred(cred);
02a913a7
TM		 1446 if (IS_ERR(state)) {
1447 switch (PTR_ERR(state)) {
1448 case -EPERM:
1449 case -EACCES:
1450 case -EDQUOT:
1451 case -ENOSPC:
1452 case -EROFS:
1453 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1454 return 1;
b87c0adf
CL		 1455 default:
1456 goto out_drop;
02a913a7 1457 }
02a913a7 1458 }
24ac23ab 1459 if (state->inode == dentry->d_inode) {
d75340cc 1460 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
4a35bd41 1461 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1462 return 1;
1463 }
a49c3c77 1464 nfs4_close_sync(&path, state, openflags);
02a913a7
TM		 1465out_drop:
1466 d_drop(dentry);
1da177e4
LT		 1467 return 0;
1468}
1469
1470
1471static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1472{
1473 struct nfs4_server_caps_res res = {};
1474 struct rpc_message msg = {
1475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1476 .rpc_argp = fhandle,
1477 .rpc_resp = &res,
1478 };
1479 int status;
1480
1481 status = rpc_call_sync(server->client, &msg, 0);
1482 if (status == 0) {
1483 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1484 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1485 server->caps |= NFS_CAP_ACLS;
1486 if (res.has_links != 0)
1487 server->caps |= NFS_CAP_HARDLINKS;
1488 if (res.has_symlinks != 0)
1489 server->caps |= NFS_CAP_SYMLINKS;
1490 server->acl_bitmask = res.acl_bitmask;
1491 }
1492 return status;
1493}
1494
55a97593 1495int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1496{
1497 struct nfs4_exception exception = { };
1498 int err;
1499 do {
1500 err = nfs4_handle_exception(server,
1501 _nfs4_server_capabilities(server, fhandle),
1502 &exception);
1503 } while (exception.retry);
1504 return err;
1505}
1506
1507static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1508 struct nfs_fsinfo *info)
1509{
1da177e4
LT		 1510 struct nfs4_lookup_root_arg args = {
1511 .bitmask = nfs4_fattr_bitmap,
1512 };
1513 struct nfs4_lookup_res res = {
1514 .server = server,
0e574af1 1515 .fattr = info->fattr,
1da177e4
LT		 1516 .fh = fhandle,
1517 };
1518 struct rpc_message msg = {
1519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1520 .rpc_argp = &args,
1521 .rpc_resp = &res,
1522 };
0e574af1 1523 nfs_fattr_init(info->fattr);
1da177e4
LT		 1524 return rpc_call_sync(server->client, &msg, 0);
1525}
1526
1527static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1528 struct nfs_fsinfo *info)
1529{
1530 struct nfs4_exception exception = { };
1531 int err;
1532 do {
1533 err = nfs4_handle_exception(server,
1534 _nfs4_lookup_root(server, fhandle, info),
1535 &exception);
1536 } while (exception.retry);
1537 return err;
1538}
1539
54ceac45
DH		 1540/*
1541 * get the file handle for the "/" directory on the server
1542 */
1da177e4 1543static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1544 struct nfs_fsinfo *info)
1da177e4 1545{
1da177e4
LT		 1546 int status;
1547
1da177e4 1548 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1549 if (status == 0)
1550 status = nfs4_server_capabilities(server, fhandle);
1551 if (status == 0)
1552 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1553 return nfs4_map_errors(status);
1da177e4
LT		 1554}
1555
6b97fd3d
MN		 1556/*
1557 * Get locations and (maybe) other attributes of a referral.
1558 * Note that we'll actually follow the referral later when
1559 * we detect fsid mismatch in inode revalidation
1560 */
56659e99 1561static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1562{
1563 int status = -ENOMEM;
1564 struct page *page = NULL;
1565 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1566
1567 page = alloc_page(GFP_KERNEL);
1568 if (page == NULL)
1569 goto out;
1570 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1571 if (locations == NULL)
1572 goto out;
1573
c228fd3a 1574 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1575 if (status != 0)
1576 goto out;
1577 /* Make sure server returned a different fsid for the referral */
1578 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 1579 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 1580 status = -EIO;
1581 goto out;
1582 }
1583
1584 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1585 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1586 if (!fattr->mode)
1587 fattr->mode = S_IFDIR;
1588 memset(fhandle, 0, sizeof(struct nfs_fh));
1589out:
1590 if (page)
1591 __free_page(page);
1592 if (locations)
1593 kfree(locations);
1594 return status;
1595}
1596
1da177e4
LT		 1597static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1598{
1599 struct nfs4_getattr_arg args = {
1600 .fh = fhandle,
1601 .bitmask = server->attr_bitmask,
1602 };
1603 struct nfs4_getattr_res res = {
1604 .fattr = fattr,
1605 .server = server,
1606 };
1607 struct rpc_message msg = {
1608 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1609 .rpc_argp = &args,
1610 .rpc_resp = &res,
1611 };
1612
0e574af1 1613 nfs_fattr_init(fattr);
1da177e4
LT		 1614 return rpc_call_sync(server->client, &msg, 0);
1615}
1616
1617static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1618{
1619 struct nfs4_exception exception = { };
1620 int err;
1621 do {
1622 err = nfs4_handle_exception(server,
1623 _nfs4_proc_getattr(server, fhandle, fattr),
1624 &exception);
1625 } while (exception.retry);
1626 return err;
1627}
1628
1629/*
1630 * The file is not closed if it is opened due to the a request to change
1631 * the size of the file. The open call will not be needed once the
1632 * VFS layer lookup-intents are implemented.
1633 *
1634 * Close is called when the inode is destroyed.
1635 * If we haven't opened the file for O_WRONLY, we
1636 * need to in the size_change case to obtain a stateid.
1637 *
1638 * Got race?
1639 * Because OPEN is always done by name in nfsv4, it is
1640 * possible that we opened a different file by the same
1641 * name. We can recognize this race condition, but we
1642 * can't do anything about it besides returning an error.
1643 *
1644 * This will be fixed with VFS changes (lookup-intent).
1645 */
1646static int
1647nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1648 struct iattr *sattr)
1649{
08e9eac4
TM		 1650 struct rpc_cred *cred;
1651 struct inode *inode = dentry->d_inode;
d530838b
TM		 1652 struct nfs_open_context *ctx;
1653 struct nfs4_state *state = NULL;
1da177e4
LT		 1654 int status;
1655
0e574af1 1656 nfs_fattr_init(fattr);
1da177e4 1657
98a8e323 1658 cred = rpc_lookup_cred();
08e9eac4
TM		 1659 if (IS_ERR(cred))
1660 return PTR_ERR(cred);
d530838b
TM		 1661
1662 /* Search for an existing open(O_WRITE) file */
1663 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1664 if (ctx != NULL)
1665 state = ctx->state;
08e9eac4 1666
3e4f6290 1667 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1668 if (status == 0)
1669 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1670 if (ctx != NULL)
1671 put_nfs_open_context(ctx);
08e9eac4 1672 put_rpccred(cred);
1da177e4
LT		 1673 return status;
1674}
1675
56659e99
TM		 1676static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1677 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1678 struct nfs_fattr *fattr)
1679{
1680 int status;
1681 struct nfs4_lookup_arg args = {
1682 .bitmask = server->attr_bitmask,
1683 .dir_fh = dirfh,
1684 .name = name,
1685 };
1686 struct nfs4_lookup_res res = {
1687 .server = server,
1688 .fattr = fattr,
1689 .fh = fhandle,
1690 };
1691 struct rpc_message msg = {
1692 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1693 .rpc_argp = &args,
1694 .rpc_resp = &res,
1695 };
1696
1697 nfs_fattr_init(fattr);
1698
1699 dprintk("NFS call lookupfh %s\n", name->name);
1700 status = rpc_call_sync(server->client, &msg, 0);
1701 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1702 return status;
1703}
1704
1705static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1706 struct qstr *name, struct nfs_fh *fhandle,
1707 struct nfs_fattr *fattr)
1708{
1709 struct nfs4_exception exception = { };
1710 int err;
1711 do {
4e56e082
TM		 1712 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1713 /* FIXME: !!!! */
1714 if (err == -NFS4ERR_MOVED) {
1715 err = -EREMOTE;
1716 break;
1717 }
1718 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1719 } while (exception.retry);
1720 return err;
1721}
1722
56659e99 1723static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1724 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1725{
4e56e082 1726 int status;
1da177e4
LT		 1727
1728 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1729 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1730 if (status == -NFS4ERR_MOVED)
1731 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1732 dprintk("NFS reply lookup: %d\n", status);
1733 return status;
1734}
1735
1736static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1737{
1738 struct nfs4_exception exception = { };
1739 int err;
1740 do {
1741 err = nfs4_handle_exception(NFS_SERVER(dir),
1742 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1743 &exception);
1744 } while (exception.retry);
1745 return err;
1746}
1747
1748static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1749{
76b32999
TM		 1750 struct nfs_server *server = NFS_SERVER(inode);
1751 struct nfs_fattr fattr;
1da177e4
LT		 1752 struct nfs4_accessargs args = {
1753 .fh = NFS_FH(inode),
76b32999
TM		 1754 .bitmask = server->attr_bitmask,
1755 };
1756 struct nfs4_accessres res = {
1757 .server = server,
1758 .fattr = &fattr,
1da177e4 1759 };
1da177e4
LT		 1760 struct rpc_message msg = {
1761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1762 .rpc_argp = &args,
1763 .rpc_resp = &res,
1764 .rpc_cred = entry->cred,
1765 };
1766 int mode = entry->mask;
1767 int status;
1768
1769 /*
1770 * Determine which access bits we want to ask for...
1771 */
1772 if (mode & MAY_READ)
1773 args.access |= NFS4_ACCESS_READ;
1774 if (S_ISDIR(inode->i_mode)) {
1775 if (mode & MAY_WRITE)
1776 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1777 if (mode & MAY_EXEC)
1778 args.access |= NFS4_ACCESS_LOOKUP;
1779 } else {
1780 if (mode & MAY_WRITE)
1781 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1782 if (mode & MAY_EXEC)
1783 args.access |= NFS4_ACCESS_EXECUTE;
1784 }
76b32999 1785 nfs_fattr_init(&fattr);
1da177e4
LT		 1786 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1787 if (!status) {
1788 entry->mask = 0;
1789 if (res.access & NFS4_ACCESS_READ)
1790 entry->mask |= MAY_READ;
1791 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1792 entry->mask |= MAY_WRITE;
1793 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1794 entry->mask |= MAY_EXEC;
76b32999 1795 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1796 }
1797 return status;
1798}
1799
1800static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1801{
1802 struct nfs4_exception exception = { };
1803 int err;
1804 do {
1805 err = nfs4_handle_exception(NFS_SERVER(inode),
1806 _nfs4_proc_access(inode, entry),
1807 &exception);
1808 } while (exception.retry);
1809 return err;
1810}
1811
1812/*
1813 * TODO: For the time being, we don't try to get any attributes
1814 * along with any of the zero-copy operations READ, READDIR,
1815 * READLINK, WRITE.
1816 *
1817 * In the case of the first three, we want to put the GETATTR
1818 * after the read-type operation -- this is because it is hard
1819 * to predict the length of a GETATTR response in v4, and thus
1820 * align the READ data correctly. This means that the GETATTR
1821 * may end up partially falling into the page cache, and we should
1822 * shift it into the 'tail' of the xdr_buf before processing.
1823 * To do this efficiently, we need to know the total length
1824 * of data received, which doesn't seem to be available outside
1825 * of the RPC layer.
1826 *
1827 * In the case of WRITE, we also want to put the GETATTR after
1828 * the operation -- in this case because we want to make sure
1829 * we get the post-operation mtime and size. This means that
1830 * we can't use xdr_encode_pages() as written: we need a variant
1831 * of it which would leave room in the 'tail' iovec.
1832 *
1833 * Both of these changes to the XDR layer would in fact be quite
1834 * minor, but I decided to leave them for a subsequent patch.
1835 */
1836static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1837 unsigned int pgbase, unsigned int pglen)
1838{
1839 struct nfs4_readlink args = {
1840 .fh = NFS_FH(inode),
1841 .pgbase = pgbase,
1842 .pglen = pglen,
1843 .pages = &page,
1844 };
1845 struct rpc_message msg = {
1846 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1847 .rpc_argp = &args,
1848 .rpc_resp = NULL,
1849 };
1850
1851 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1852}
1853
1854static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1855 unsigned int pgbase, unsigned int pglen)
1856{
1857 struct nfs4_exception exception = { };
1858 int err;
1859 do {
1860 err = nfs4_handle_exception(NFS_SERVER(inode),
1861 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1862 &exception);
1863 } while (exception.retry);
1864 return err;
1865}
1866
1da177e4
LT		 1867/*
1868 * Got race?
1869 * We will need to arrange for the VFS layer to provide an atomic open.
1870 * Until then, this create/open method is prone to inefficiency and race
1871 * conditions due to the lookup, create, and open VFS calls from sys_open()
1872 * placed on the wire.
1873 *
1874 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1875 * The file will be opened again in the subsequent VFS open call
1876 * (nfs4_proc_file_open).
1877 *
1878 * The open for read will just hang around to be used by any process that
1879 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1880 */
1881
1882static int
1883nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1884 int flags, struct nameidata *nd)
1da177e4 1885{
ad389da7 1886 struct path path = {
4ac91378 1887 .mnt = nd->path.mnt,
ad389da7
TM		 1888 .dentry = dentry,
1889 };
1da177e4
LT		 1890 struct nfs4_state *state;
1891 struct rpc_cred *cred;
1892 int status = 0;
1893
98a8e323 1894 cred = rpc_lookup_cred();
1da177e4
LT		 1895 if (IS_ERR(cred)) {
1896 status = PTR_ERR(cred);
1897 goto out;
1898 }
ad389da7 1899 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1da177e4 1900 put_rpccred(cred);
d4d9cdcb 1901 d_drop(dentry);
1da177e4
LT		 1902 if (IS_ERR(state)) {
1903 status = PTR_ERR(state);
1904 goto out;
1905 }
d4d9cdcb 1906 d_add(dentry, igrab(state->inode));
d75340cc 1907 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
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
a49c3c77 1918 nfs4_close_sync(&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
3110ff80 2212 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 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);
c4812998
TM		 2221
2222 nfs_invalidate_atime(dir);
2223
3110ff80 2224 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2225 return status;
2226}
2227
2228static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2229 u64 cookie, struct page *page, unsigned int count, int plus)
2230{
2231 struct nfs4_exception exception = { };
2232 int err;
2233 do {
2234 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2235 _nfs4_proc_readdir(dentry, cred, cookie,
2236 page, count, plus),
2237 &exception);
2238 } while (exception.retry);
2239 return err;
2240}
2241
2242static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2243 struct iattr *sattr, dev_t rdev)
2244{
2245 struct nfs_server *server = NFS_SERVER(dir);
2246 struct nfs_fh fh;
56ae19f3 2247 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2248 struct nfs4_create_arg arg = {
2249 .dir_fh = NFS_FH(dir),
2250 .server = server,
2251 .name = &dentry->d_name,
2252 .attrs = sattr,
2253 .bitmask = server->attr_bitmask,
2254 };
2255 struct nfs4_create_res res = {
2256 .server = server,
2257 .fh = &fh,
2258 .fattr = &fattr,
56ae19f3 2259 .dir_fattr = &dir_fattr,
1da177e4
LT		 2260 };
2261 struct rpc_message msg = {
2262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2263 .rpc_argp = &arg,
2264 .rpc_resp = &res,
2265 };
2266 int status;
2267 int mode = sattr->ia_mode;
2268
0e574af1 2269 nfs_fattr_init(&fattr);
56ae19f3 2270 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2271
2272 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2273 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2274 if (S_ISFIFO(mode))
2275 arg.ftype = NF4FIFO;
2276 else if (S_ISBLK(mode)) {
2277 arg.ftype = NF4BLK;
2278 arg.u.device.specdata1 = MAJOR(rdev);
2279 arg.u.device.specdata2 = MINOR(rdev);
2280 }
2281 else if (S_ISCHR(mode)) {
2282 arg.ftype = NF4CHR;
2283 arg.u.device.specdata1 = MAJOR(rdev);
2284 arg.u.device.specdata2 = MINOR(rdev);
2285 }
2286 else
2287 arg.ftype = NF4SOCK;
2288
2289 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2290 if (status == 0) {
2291 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2292 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2293 status = nfs_instantiate(dentry, &fh, &fattr);
2294 }
2295 return status;
2296}
2297
2298static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2299 struct iattr *sattr, dev_t rdev)
2300{
2301 struct nfs4_exception exception = { };
2302 int err;
2303 do {
2304 err = nfs4_handle_exception(NFS_SERVER(dir),
2305 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2306 &exception);
2307 } while (exception.retry);
2308 return err;
2309}
2310
2311static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2312 struct nfs_fsstat *fsstat)
2313{
2314 struct nfs4_statfs_arg args = {
2315 .fh = fhandle,
2316 .bitmask = server->attr_bitmask,
2317 };
2318 struct rpc_message msg = {
2319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2320 .rpc_argp = &args,
2321 .rpc_resp = fsstat,
2322 };
2323
0e574af1 2324 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2325 return rpc_call_sync(server->client, &msg, 0);
2326}
2327
2328static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2329{
2330 struct nfs4_exception exception = { };
2331 int err;
2332 do {
2333 err = nfs4_handle_exception(server,
2334 _nfs4_proc_statfs(server, fhandle, fsstat),
2335 &exception);
2336 } while (exception.retry);
2337 return err;
2338}
2339
2340static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2341 struct nfs_fsinfo *fsinfo)
2342{
2343 struct nfs4_fsinfo_arg args = {
2344 .fh = fhandle,
2345 .bitmask = server->attr_bitmask,
2346 };
2347 struct rpc_message msg = {
2348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2349 .rpc_argp = &args,
2350 .rpc_resp = fsinfo,
2351 };
2352
2353 return rpc_call_sync(server->client, &msg, 0);
2354}
2355
2356static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2357{
2358 struct nfs4_exception exception = { };
2359 int err;
2360
2361 do {
2362 err = nfs4_handle_exception(server,
2363 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2364 &exception);
2365 } while (exception.retry);
2366 return err;
2367}
2368
2369static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2370{
0e574af1 2371 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2372 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2373}
2374
2375static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2376 struct nfs_pathconf *pathconf)
2377{
2378 struct nfs4_pathconf_arg args = {
2379 .fh = fhandle,
2380 .bitmask = server->attr_bitmask,
2381 };
2382 struct rpc_message msg = {
2383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2384 .rpc_argp = &args,
2385 .rpc_resp = pathconf,
2386 };
2387
2388 /* None of the pathconf attributes are mandatory to implement */
2389 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2390 memset(pathconf, 0, sizeof(*pathconf));
2391 return 0;
2392 }
2393
0e574af1 2394 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2395 return rpc_call_sync(server->client, &msg, 0);
2396}
2397
2398static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2399 struct nfs_pathconf *pathconf)
2400{
2401 struct nfs4_exception exception = { };
2402 int err;
2403
2404 do {
2405 err = nfs4_handle_exception(server,
2406 _nfs4_proc_pathconf(server, fhandle, pathconf),
2407 &exception);
2408 } while (exception.retry);
2409 return err;
2410}
2411
ec06c096 2412static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2413{
ec06c096 2414 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2415
ec06c096 2416 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2417 rpc_restart_call(task);
ec06c096 2418 return -EAGAIN;
1da177e4 2419 }
8850df99
TM		 2420
2421 nfs_invalidate_atime(data->inode);
1da177e4 2422 if (task->tk_status > 0)
ec06c096
TM		 2423 renew_lease(server, data->timestamp);
2424 return 0;
1da177e4
LT		 2425}
2426
bdc7f021 2427static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2428{
1da177e4 2429 data->timestamp = jiffies;
bdc7f021 2430 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2431}
2432
788e7a89 2433static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2434{
1da177e4
LT		 2435 struct inode *inode = data->inode;
2436
2437 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2438 rpc_restart_call(task);
788e7a89 2439 return -EAGAIN;
1da177e4 2440 }
4f9838c7 2441 if (task->tk_status >= 0) {
1da177e4 2442 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2443 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2444 }
788e7a89 2445 return 0;
1da177e4
LT		 2446}
2447
bdc7f021 2448static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2449{
bdc7f021
TM		 2450 struct nfs_server *server = NFS_SERVER(data->inode);
2451
4f9838c7
TM		 2452 data->args.bitmask = server->attr_bitmask;
2453 data->res.server = server;
1da177e4
LT		 2454 data->timestamp = jiffies;
2455
bdc7f021 2456 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2457}
2458
788e7a89 2459static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2460{
1da177e4
LT		 2461 struct inode *inode = data->inode;
2462
2463 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2464 rpc_restart_call(task);
788e7a89 2465 return -EAGAIN;
1da177e4 2466 }
9e08a3c5 2467 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2468 return 0;
1da177e4
LT		 2469}
2470
bdc7f021 2471static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2472{
788e7a89 2473 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2474
4f9838c7
TM		 2475 data->args.bitmask = server->attr_bitmask;
2476 data->res.server = server;
bdc7f021 2477 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2478}
2479
2480/*
2481 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2482 * standalone procedure for queueing an asynchronous RENEW.
2483 */
963d8fe5 2484static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2485{
adfa6f98 2486 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2487 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2488
2489 if (task->tk_status < 0) {
2490 switch (task->tk_status) {
2491 case -NFS4ERR_STALE_CLIENTID:
2492 case -NFS4ERR_EXPIRED:
2493 case -NFS4ERR_CB_PATH_DOWN:
2494 nfs4_schedule_state_recovery(clp);
2495 }
2496 return;
2497 }
2498 spin_lock(&clp->cl_lock);
2499 if (time_before(clp->cl_last_renewal,timestamp))
2500 clp->cl_last_renewal = timestamp;
2501 spin_unlock(&clp->cl_lock);
2502}
2503
963d8fe5
TM		 2504static const struct rpc_call_ops nfs4_renew_ops = {
2505 .rpc_call_done = nfs4_renew_done,
2506};
2507
adfa6f98 2508int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2509{
2510 struct rpc_message msg = {
2511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2512 .rpc_argp = clp,
b4454fe1 2513 .rpc_cred = cred,
1da177e4
LT		 2514 };
2515
2516 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2517 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2518}
2519
adfa6f98 2520int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2521{
2522 struct rpc_message msg = {
2523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2524 .rpc_argp = clp,
b4454fe1 2525 .rpc_cred = cred,
1da177e4
LT		 2526 };
2527 unsigned long now = jiffies;
2528 int status;
2529
2530 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2531 if (status < 0)
2532 return status;
2533 spin_lock(&clp->cl_lock);
2534 if (time_before(clp->cl_last_renewal,now))
2535 clp->cl_last_renewal = now;
2536 spin_unlock(&clp->cl_lock);
2537 return 0;
2538}
2539
aa1870af
BF		 2540static inline int nfs4_server_supports_acls(struct nfs_server *server)
2541{
2542 return (server->caps & NFS_CAP_ACLS)
2543 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2544 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2545}
2546
2547/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2548 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2549 * the stack.
2550 */
2551#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2552
2553static void buf_to_pages(const void *buf, size_t buflen,
2554 struct page **pages, unsigned int *pgbase)
2555{
2556 const void *p = buf;
2557
2558 *pgbase = offset_in_page(buf);
2559 p -= *pgbase;
2560 while (p < buf + buflen) {
2561 *(pages++) = virt_to_page(p);
2562 p += PAGE_CACHE_SIZE;
2563 }
2564}
2565
e50a1c2e
BF		 2566struct nfs4_cached_acl {
2567 int cached;
2568 size_t len;
3e9d4154 2569 char data[0];
e50a1c2e
BF		 2570};
2571
2572static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2573{
2574 struct nfs_inode *nfsi = NFS_I(inode);
2575
2576 spin_lock(&inode->i_lock);
2577 kfree(nfsi->nfs4_acl);
2578 nfsi->nfs4_acl = acl;
2579 spin_unlock(&inode->i_lock);
2580}
2581
2582static void nfs4_zap_acl_attr(struct inode *inode)
2583{
2584 nfs4_set_cached_acl(inode, NULL);
2585}
2586
2587static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2588{
2589 struct nfs_inode *nfsi = NFS_I(inode);
2590 struct nfs4_cached_acl *acl;
2591 int ret = -ENOENT;
2592
2593 spin_lock(&inode->i_lock);
2594 acl = nfsi->nfs4_acl;
2595 if (acl == NULL)
2596 goto out;
2597 if (buf == NULL) /* user is just asking for length */
2598 goto out_len;
2599 if (acl->cached == 0)
2600 goto out;
2601 ret = -ERANGE; /* see getxattr(2) man page */
2602 if (acl->len > buflen)
2603 goto out;
2604 memcpy(buf, acl->data, acl->len);
2605out_len:
2606 ret = acl->len;
2607out:
2608 spin_unlock(&inode->i_lock);
2609 return ret;
2610}
2611
2612static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2613{
2614 struct nfs4_cached_acl *acl;
2615
2616 if (buf && acl_len <= PAGE_SIZE) {
2617 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2618 if (acl == NULL)
2619 goto out;
2620 acl->cached = 1;
2621 memcpy(acl->data, buf, acl_len);
2622 } else {
2623 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2624 if (acl == NULL)
2625 goto out;
2626 acl->cached = 0;
2627 }
2628 acl->len = acl_len;
2629out:
2630 nfs4_set_cached_acl(inode, acl);
2631}
2632
16b4289c 2633static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2634{
aa1870af
BF		 2635 struct page *pages[NFS4ACL_MAXPAGES];
2636 struct nfs_getaclargs args = {
2637 .fh = NFS_FH(inode),
2638 .acl_pages = pages,
2639 .acl_len = buflen,
2640 };
2641 size_t resp_len = buflen;
e50a1c2e 2642 void *resp_buf;
aa1870af
BF		 2643 struct rpc_message msg = {
2644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2645 .rpc_argp = &args,
2646 .rpc_resp = &resp_len,
2647 };
e50a1c2e 2648 struct page *localpage = NULL;
aa1870af
BF		 2649 int ret;
2650
e50a1c2e
BF		 2651 if (buflen < PAGE_SIZE) {
2652 /* As long as we're doing a round trip to the server anyway,
2653 * let's be prepared for a page of acl data. */
2654 localpage = alloc_page(GFP_KERNEL);
2655 resp_buf = page_address(localpage);
2656 if (localpage == NULL)
2657 return -ENOMEM;
2658 args.acl_pages[0] = localpage;
2659 args.acl_pgbase = 0;
1d95db8e 2660 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2661 } else {
2662 resp_buf = buf;
2663 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2664 }
aa1870af 2665 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2666 if (ret)
2667 goto out_free;
2668 if (resp_len > args.acl_len)
2669 nfs4_write_cached_acl(inode, NULL, resp_len);
2670 else
2671 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2672 if (buf) {
2673 ret = -ERANGE;
2674 if (resp_len > buflen)
2675 goto out_free;
2676 if (localpage)
2677 memcpy(buf, resp_buf, resp_len);
2678 }
2679 ret = resp_len;
2680out_free:
2681 if (localpage)
2682 __free_page(localpage);
aa1870af
BF		 2683 return ret;
2684}
2685
16b4289c
TM		 2686static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2687{
2688 struct nfs4_exception exception = { };
2689 ssize_t ret;
2690 do {
2691 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2692 if (ret >= 0)
2693 break;
2694 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2695 } while (exception.retry);
2696 return ret;
2697}
2698
e50a1c2e
BF		 2699static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2700{
2701 struct nfs_server *server = NFS_SERVER(inode);
2702 int ret;
2703
2704 if (!nfs4_server_supports_acls(server))
2705 return -EOPNOTSUPP;
2706 ret = nfs_revalidate_inode(server, inode);
2707 if (ret < 0)
2708 return ret;
2709 ret = nfs4_read_cached_acl(inode, buf, buflen);
2710 if (ret != -ENOENT)
2711 return ret;
2712 return nfs4_get_acl_uncached(inode, buf, buflen);
2713}
2714
16b4289c 2715static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2716{
2717 struct nfs_server *server = NFS_SERVER(inode);
2718 struct page *pages[NFS4ACL_MAXPAGES];
2719 struct nfs_setaclargs arg = {
2720 .fh = NFS_FH(inode),
2721 .acl_pages = pages,
2722 .acl_len = buflen,
2723 };
2724 struct rpc_message msg = {
2725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2726 .rpc_argp = &arg,
2727 .rpc_resp = NULL,
2728 };
2729 int ret;
2730
2731 if (!nfs4_server_supports_acls(server))
2732 return -EOPNOTSUPP;
642ac549 2733 nfs_inode_return_delegation(inode);
4b580ee3 2734 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2735 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
08efa202 2736 nfs_zap_caches(inode);
4b580ee3
BF		 2737 return ret;
2738}
2739
16b4289c
TM		 2740static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2741{
2742 struct nfs4_exception exception = { };
2743 int err;
2744 do {
2745 err = nfs4_handle_exception(NFS_SERVER(inode),
2746 __nfs4_proc_set_acl(inode, buf, buflen),
2747 &exception);
2748 } while (exception.retry);
2749 return err;
2750}
2751
1da177e4 2752static int
faf5f49c 2753nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2754{
7539bbab 2755 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2756
2757 if (!clp || task->tk_status >= 0)
2758 return 0;
2759 switch(task->tk_status) {
2760 case -NFS4ERR_STALE_CLIENTID:
2761 case -NFS4ERR_STALE_STATEID:
2762 case -NFS4ERR_EXPIRED:
5d00837b 2763 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 2764 nfs4_schedule_state_recovery(clp);
433fbe4c 2765 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
fda13939 2766 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 2767 task->tk_status = 0;
2768 return -EAGAIN;
1da177e4 2769 case -NFS4ERR_DELAY:
006ea73e
CL		 2770 nfs_inc_server_stats((struct nfs_server *) server,
2771 NFSIOS_DELAY);
2772 case -NFS4ERR_GRACE:
1da177e4
LT		 2773 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2774 task->tk_status = 0;
2775 return -EAGAIN;
2776 case -NFS4ERR_OLD_STATEID:
2777 task->tk_status = 0;
2778 return -EAGAIN;
2779 }
2780 task->tk_status = nfs4_map_errors(task->tk_status);
2781 return 0;
2782}
2783
150030b7 2784static int nfs4_wait_bit_killable(void *word)
433fbe4c 2785{
150030b7 2786 if (fatal_signal_pending(current))
433fbe4c
TM		 2787 return -ERESTARTSYS;
2788 schedule();
2789 return 0;
2790}
2791
adfa6f98 2792static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2793{
433fbe4c 2794 int res;
1da177e4
LT		 2795
2796 might_sleep();
2797
e148582e
TM		 2798 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2799
433fbe4c 2800 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
150030b7 2801 nfs4_wait_bit_killable, TASK_KILLABLE);
e148582e
TM		 2802
2803 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT		 2804 return res;
2805}
2806
2807static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2808{
1da177e4
LT		 2809 int res = 0;
2810
2811 might_sleep();
2812
2813 if (*timeout <= 0)
2814 *timeout = NFS4_POLL_RETRY_MIN;
2815 if (*timeout > NFS4_POLL_RETRY_MAX)
2816 *timeout = NFS4_POLL_RETRY_MAX;
150030b7
MW		 2817 schedule_timeout_killable(*timeout);
2818 if (fatal_signal_pending(current))
2819 res = -ERESTARTSYS;
1da177e4
LT		 2820 *timeout <<= 1;
2821 return res;
2822}
2823
2824/* This is the error handling routine for processes that are allowed
2825 * to sleep.
2826 */
10afec90 2827static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2828{
7539bbab 2829 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2830 int ret = errorcode;
2831
2832 exception->retry = 0;
2833 switch(errorcode) {
2834 case 0:
2835 return 0;
2836 case -NFS4ERR_STALE_CLIENTID:
2837 case -NFS4ERR_STALE_STATEID:
2838 case -NFS4ERR_EXPIRED:
433fbe4c 2839 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2840 ret = nfs4_wait_clnt_recover(server->client, clp);
2841 if (ret == 0)
2842 exception->retry = 1;
2843 break;
c514983d 2844 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2845 case -NFS4ERR_GRACE:
2846 case -NFS4ERR_DELAY:
2847 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2848 if (ret != 0)
2849 break;
1da177e4 2850 case -NFS4ERR_OLD_STATEID:
2c56617d 2851 exception->retry = 1;
1da177e4
LT		 2852 }
2853 /* We failed to handle the error */
2854 return nfs4_map_errors(ret);
2855}
2856
adfa6f98 2857int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2858{
2859 nfs4_verifier sc_verifier;
2860 struct nfs4_setclientid setclientid = {
2861 .sc_verifier = &sc_verifier,
2862 .sc_prog = program,
2863 };
2864 struct rpc_message msg = {
2865 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2866 .rpc_argp = &setclientid,
2867 .rpc_resp = clp,
286d7d6a 2868 .rpc_cred = cred,
1da177e4 2869 };
bc4785cd 2870 __be32 *p;
1da177e4
LT		 2871 int loop = 0;
2872 int status;
2873
bc4785cd 2874 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2875 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2876 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2877
2878 for(;;) {
2879 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 2880 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 2881 clp->cl_ipaddr,
2882 rpc_peeraddr2str(clp->cl_rpcclient,
2883 RPC_DISPLAY_ADDR),
69dd716c
TM		 2884 rpc_peeraddr2str(clp->cl_rpcclient,
2885 RPC_DISPLAY_PROTO),
78ea323b 2886 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 2887 clp->cl_id_uniquifier);
2888 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 2889 sizeof(setclientid.sc_netid),
2890 rpc_peeraddr2str(clp->cl_rpcclient,
2891 RPC_DISPLAY_NETID));
1da177e4 2892 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 2893 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 2894 clp->cl_ipaddr, port >> 8, port & 255);
2895
2896 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2897 if (status != -NFS4ERR_CLID_INUSE)
2898 break;
2899 if (signalled())
2900 break;
2901 if (loop++ & 1)
2902 ssleep(clp->cl_lease_time + 1);
2903 else
2904 if (++clp->cl_id_uniquifier == 0)
2905 break;
2906 }
2907 return status;
2908}
2909
adfa6f98 2910static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2911{
2912 struct nfs_fsinfo fsinfo;
2913 struct rpc_message msg = {
2914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2915 .rpc_argp = clp,
2916 .rpc_resp = &fsinfo,
286d7d6a 2917 .rpc_cred = cred,
1da177e4
LT		 2918 };
2919 unsigned long now;
2920 int status;
2921
2922 now = jiffies;
2923 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2924 if (status == 0) {
2925 spin_lock(&clp->cl_lock);
2926 clp->cl_lease_time = fsinfo.lease_time * HZ;
2927 clp->cl_last_renewal = now;
58d9714a 2928 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2929 spin_unlock(&clp->cl_lock);
2930 }
2931 return status;
2932}
2933
adfa6f98 2934int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM		 2935{
2936 long timeout;
2937 int err;
2938 do {
2939 err = _nfs4_proc_setclientid_confirm(clp, cred);
2940 switch (err) {
2941 case 0:
2942 return err;
2943 case -NFS4ERR_RESOURCE:
2944 /* The IBM lawyers misread another document! */
2945 case -NFS4ERR_DELAY:
2946 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2947 }
2948 } while (err == 0);
2949 return err;
2950}
2951
fe650407
TM		 2952struct nfs4_delegreturndata {
2953 struct nfs4_delegreturnargs args;
fa178f29 2954 struct nfs4_delegreturnres res;
fe650407
TM		 2955 struct nfs_fh fh;
2956 nfs4_stateid stateid;
26e976a8 2957 unsigned long timestamp;
fa178f29 2958 struct nfs_fattr fattr;
fe650407
TM		 2959 int rpc_status;
2960};
2961
fe650407
TM		 2962static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2963{
2964 struct nfs4_delegreturndata *data = calldata;
2965 data->rpc_status = task->tk_status;
26e976a8 2966 if (data->rpc_status == 0)
fa178f29 2967 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 2968}
2969
2970static void nfs4_delegreturn_release(void *calldata)
2971{
fe650407
TM		 2972 kfree(calldata);
2973}
2974
c8d149f3 2975static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 2976 .rpc_call_done = nfs4_delegreturn_done,
2977 .rpc_release = nfs4_delegreturn_release,
2978};
2979
e6f81075 2980static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 2981{
2982 struct nfs4_delegreturndata *data;
fa178f29 2983 struct nfs_server *server = NFS_SERVER(inode);
fe650407 2984 struct rpc_task *task;
5138fde0
TM		 2985 struct rpc_message msg = {
2986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2987 .rpc_cred = cred,
2988 };
c970aa85
TM		 2989 struct rpc_task_setup task_setup_data = {
2990 .rpc_client = server->client,
5138fde0 2991 .rpc_message = &msg,
c970aa85
TM		 2992 .callback_ops = &nfs4_delegreturn_ops,
2993 .flags = RPC_TASK_ASYNC,
2994 };
e6f81075 2995 int status = 0;
fe650407
TM		 2996
2997 data = kmalloc(sizeof(*data), GFP_KERNEL);
2998 if (data == NULL)
2999 return -ENOMEM;
3000 data->args.fhandle = &data->fh;
3001 data->args.stateid = &data->stateid;
fa178f29 3002 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3003 nfs_copy_fh(&data->fh, NFS_FH(inode));
3004 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3005 data->res.fattr = &data->fattr;
3006 data->res.server = server;
5138fde0 3007 nfs_fattr_init(data->res.fattr);
26e976a8 3008 data->timestamp = jiffies;
fe650407
TM		 3009 data->rpc_status = 0;
3010
c970aa85 3011 task_setup_data.callback_data = data;
5138fde0
TM		 3012 msg.rpc_argp = &data->args,
3013 msg.rpc_resp = &data->res,
c970aa85 3014 task = rpc_run_task(&task_setup_data);
7a1218a2 3015 if (IS_ERR(task))
fe650407 3016 return PTR_ERR(task);
e6f81075
TM		 3017 if (!issync)
3018 goto out;
fe650407 3019 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3020 if (status != 0)
3021 goto out;
3022 status = data->rpc_status;
3023 if (status != 0)
3024 goto out;
3025 nfs_refresh_inode(inode, &data->fattr);
3026out:
e6b3c4db 3027 rpc_put_task(task);
fe650407 3028 return status;
1da177e4
LT		 3029}
3030
e6f81075 3031int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3032{
3033 struct nfs_server *server = NFS_SERVER(inode);
3034 struct nfs4_exception exception = { };
3035 int err;
3036 do {
e6f81075 3037 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3038 switch (err) {
3039 case -NFS4ERR_STALE_STATEID:
3040 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3041 case 0:
3042 return 0;
3043 }
3044 err = nfs4_handle_exception(server, err, &exception);
3045 } while (exception.retry);
3046 return err;
3047}
3048
3049#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3050#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3051
3052/*
3053 * sleep, with exponential backoff, and retry the LOCK operation.
3054 */
3055static unsigned long
3056nfs4_set_lock_task_retry(unsigned long timeout)
3057{
150030b7 3058 schedule_timeout_killable(timeout);
1da177e4
LT		 3059 timeout <<= 1;
3060 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3061 return NFS4_LOCK_MAXTIMEOUT;
3062 return timeout;
3063}
3064
1da177e4
LT		 3065static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3066{
3067 struct inode *inode = state->inode;
3068 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3069 struct nfs_client *clp = server->nfs_client;
911d1aaf 3070 struct nfs_lockt_args arg = {
1da177e4 3071 .fh = NFS_FH(inode),
911d1aaf 3072 .fl = request,
1da177e4 3073 };
911d1aaf
TM		 3074 struct nfs_lockt_res res = {
3075 .denied = request,
1da177e4
LT		 3076 };
3077 struct rpc_message msg = {
3078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3079 .rpc_argp = &arg,
3080 .rpc_resp = &res,
3081 .rpc_cred = state->owner->so_cred,
3082 };
1da177e4
LT		 3083 struct nfs4_lock_state *lsp;
3084 int status;
3085
3086 down_read(&clp->cl_sem);
911d1aaf 3087 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3088 status = nfs4_set_lock_state(state, request);
3089 if (status != 0)
3090 goto out;
3091 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3092 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3093 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3094 switch (status) {
3095 case 0:
3096 request->fl_type = F_UNLCK;
3097 break;
3098 case -NFS4ERR_DENIED:
3099 status = 0;
1da177e4 3100 }
70cc6487 3101 request->fl_ops->fl_release_private(request);
8d0a8a9d 3102out:
1da177e4
LT		 3103 up_read(&clp->cl_sem);
3104 return status;
3105}
3106
3107static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3108{
3109 struct nfs4_exception exception = { };
3110 int err;
3111
3112 do {
3113 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3114 _nfs4_proc_getlk(state, cmd, request),
3115 &exception);
3116 } while (exception.retry);
3117 return err;
3118}
3119
3120static int do_vfs_lock(struct file *file, struct file_lock *fl)
3121{
3122 int res = 0;
3123 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3124 case FL_POSIX:
3125 res = posix_lock_file_wait(file, fl);
3126 break;
3127 case FL_FLOCK:
3128 res = flock_lock_file_wait(file, fl);
3129 break;
3130 default:
3131 BUG();
3132 }
1da177e4
LT		 3133 return res;
3134}
3135
faf5f49c 3136struct nfs4_unlockdata {
911d1aaf
TM		 3137 struct nfs_locku_args arg;
3138 struct nfs_locku_res res;
faf5f49c
TM		 3139 struct nfs4_lock_state *lsp;
3140 struct nfs_open_context *ctx;
911d1aaf
TM		 3141 struct file_lock fl;
3142 const struct nfs_server *server;
26e976a8 3143 unsigned long timestamp;
faf5f49c
TM		 3144};
3145
911d1aaf
TM		 3146static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3147 struct nfs_open_context *ctx,
3148 struct nfs4_lock_state *lsp,
3149 struct nfs_seqid *seqid)
3150{
3151 struct nfs4_unlockdata *p;
3152 struct inode *inode = lsp->ls_state->inode;
3153
3154 p = kmalloc(sizeof(*p), GFP_KERNEL);
3155 if (p == NULL)
3156 return NULL;
3157 p->arg.fh = NFS_FH(inode);
3158 p->arg.fl = &p->fl;
3159 p->arg.seqid = seqid;
c1d51931 3160 p->res.seqid = seqid;
911d1aaf
TM		 3161 p->arg.stateid = &lsp->ls_stateid;
3162 p->lsp = lsp;
3163 atomic_inc(&lsp->ls_count);
3164 /* Ensure we don't close file until we're done freeing locks! */
3165 p->ctx = get_nfs_open_context(ctx);
3166 memcpy(&p->fl, fl, sizeof(p->fl));
3167 p->server = NFS_SERVER(inode);
3168 return p;
3169}
3170
06f814a3 3171static void nfs4_locku_release_calldata(void *data)
faf5f49c 3172{
963d8fe5 3173 struct nfs4_unlockdata *calldata = data;
911d1aaf 3174 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3175 nfs4_put_lock_state(calldata->lsp);
3176 put_nfs_open_context(calldata->ctx);
3177 kfree(calldata);
faf5f49c
TM		 3178}
3179
963d8fe5 3180static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3181{
963d8fe5 3182 struct nfs4_unlockdata *calldata = data;
faf5f49c 3183
06f814a3
TM		 3184 if (RPC_ASSASSINATED(task))
3185 return;
faf5f49c
TM		 3186 switch (task->tk_status) {
3187 case 0:
3188 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3189 calldata->res.stateid.data,
faf5f49c 3190 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3191 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3192 break;
3193 case -NFS4ERR_STALE_STATEID:
3194 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3195 break;
3196 default:
a6a352e9 3197 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
faf5f49c 3198 rpc_restart_call(task);
faf5f49c 3199 }
faf5f49c
TM		 3200}
3201
4ce70ada 3202static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3203{
4ce70ada 3204 struct nfs4_unlockdata *calldata = data;
faf5f49c 3205
911d1aaf 3206 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3207 return;
3208 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3209 /* Note: exit _without_ running nfs4_locku_done */
3210 task->tk_action = NULL;
faf5f49c
TM		 3211 return;
3212 }
26e976a8 3213 calldata->timestamp = jiffies;
5138fde0 3214 rpc_call_start(task);
faf5f49c
TM		 3215}
3216
963d8fe5 3217static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3218 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3219 .rpc_call_done = nfs4_locku_done,
06f814a3 3220 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3221};
3222
a5d16a4d
TM		 3223static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3224 struct nfs_open_context *ctx,
3225 struct nfs4_lock_state *lsp,
3226 struct nfs_seqid *seqid)
3227{
3228 struct nfs4_unlockdata *data;
5138fde0
TM		 3229 struct rpc_message msg = {
3230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3231 .rpc_cred = ctx->cred,
3232 };
c970aa85
TM		 3233 struct rpc_task_setup task_setup_data = {
3234 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3235 .rpc_message = &msg,
c970aa85 3236 .callback_ops = &nfs4_locku_ops,
101070ca 3237 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3238 .flags = RPC_TASK_ASYNC,
3239 };
a5d16a4d 3240
137d6aca
FF		 3241 /* Ensure this is an unlock - when canceling a lock, the
3242 * canceled lock is passed in, and it won't be an unlock.
3243 */
3244 fl->fl_type = F_UNLCK;
3245
a5d16a4d
TM		 3246 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3247 if (data == NULL) {
3248 nfs_free_seqid(seqid);
3249 return ERR_PTR(-ENOMEM);
3250 }
3251
5138fde0
TM		 3252 msg.rpc_argp = &data->arg,
3253 msg.rpc_resp = &data->res,
c970aa85
TM		 3254 task_setup_data.callback_data = data;
3255 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3256}
3257
faf5f49c
TM		 3258static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3259{
911d1aaf 3260 struct nfs_seqid *seqid;
1da177e4 3261 struct nfs4_lock_state *lsp;
06f814a3
TM		 3262 struct rpc_task *task;
3263 int status = 0;
536ff0f8 3264 unsigned char fl_flags = request->fl_flags;
faf5f49c 3265
8d0a8a9d 3266 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3267 /* Unlock _before_ we do the RPC call */
3268 request->fl_flags |= FL_EXISTS;
3269 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3270 goto out;
8d0a8a9d 3271 if (status != 0)
9b073574
TM		 3272 goto out;
3273 /* Is this a delegated lock? */
3274 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3275 goto out;
8d0a8a9d 3276 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3277 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3278 status = -ENOMEM;
911d1aaf 3279 if (seqid == NULL)
9b073574 3280 goto out;
cd3758e3 3281 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3282 status = PTR_ERR(task);
3283 if (IS_ERR(task))
9b073574 3284 goto out;
a5d16a4d 3285 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3286 rpc_put_task(task);
9b073574 3287out:
536ff0f8 3288 request->fl_flags = fl_flags;
1da177e4
LT		 3289 return status;
3290}
3291
a5d16a4d
TM		 3292struct nfs4_lockdata {
3293 struct nfs_lock_args arg;
3294 struct nfs_lock_res res;
3295 struct nfs4_lock_state *lsp;
3296 struct nfs_open_context *ctx;
3297 struct file_lock fl;
26e976a8 3298 unsigned long timestamp;
a5d16a4d
TM		 3299 int rpc_status;
3300 int cancelled;
3301};
3302
3303static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3304 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3305{
a5d16a4d
TM		 3306 struct nfs4_lockdata *p;
3307 struct inode *inode = lsp->ls_state->inode;
1da177e4 3308 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3309
3310 p = kzalloc(sizeof(*p), GFP_KERNEL);
3311 if (p == NULL)
3312 return NULL;
3313
3314 p->arg.fh = NFS_FH(inode);
3315 p->arg.fl = &p->fl;
2f74c0a0
TM		 3316 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3317 if (p->arg.open_seqid == NULL)
3318 goto out_free;
a5d16a4d
TM		 3319 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3320 if (p->arg.lock_seqid == NULL)
2f74c0a0 3321 goto out_free_seqid;
a5d16a4d 3322 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3323 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3324 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3325 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d
TM		 3326 p->lsp = lsp;
3327 atomic_inc(&lsp->ls_count);
3328 p->ctx = get_nfs_open_context(ctx);
3329 memcpy(&p->fl, fl, sizeof(p->fl));
3330 return p;
2f74c0a0
TM		 3331out_free_seqid:
3332 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3333out_free:
3334 kfree(p);
3335 return NULL;
3336}
3337
3338static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3339{
3340 struct nfs4_lockdata *data = calldata;
3341 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3342
3110ff80 3343 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3344 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3345 return;
a5d16a4d
TM		 3346 /* Do we need to do an open_to_lock_owner? */
3347 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3348 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3349 return;
a5d16a4d
TM		 3350 data->arg.open_stateid = &state->stateid;
3351 data->arg.new_lock_owner = 1;
c1d51931 3352 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3353 } else
3354 data->arg.new_lock_owner = 0;
26e976a8 3355 data->timestamp = jiffies;
5138fde0 3356 rpc_call_start(task);
3110ff80 3357 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3358}
3359
3360static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3361{
3362 struct nfs4_lockdata *data = calldata;
3363
3110ff80 3364 dprintk("%s: begin!\n", __func__);
a5d16a4d
TM		 3365
3366 data->rpc_status = task->tk_status;
3367 if (RPC_ASSASSINATED(task))
3368 goto out;
3369 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3370 if (data->rpc_status == 0)
3371 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3372 else
3373 goto out;
3374 }
3375 if (data->rpc_status == 0) {
3376 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3377 sizeof(data->lsp->ls_stateid.data));
3378 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3379 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3380 }
a5d16a4d 3381out:
3110ff80 3382 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3383}
3384
3385static void nfs4_lock_release(void *calldata)
3386{
3387 struct nfs4_lockdata *data = calldata;
3388
3110ff80 3389 dprintk("%s: begin!\n", __func__);
2f74c0a0 3390 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3391 if (data->cancelled != 0) {
3392 struct rpc_task *task;
3393 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3394 data->arg.lock_seqid);
3395 if (!IS_ERR(task))
e6b3c4db 3396 rpc_put_task(task);
3110ff80 3397 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3398 } else
3399 nfs_free_seqid(data->arg.lock_seqid);
3400 nfs4_put_lock_state(data->lsp);
3401 put_nfs_open_context(data->ctx);
3402 kfree(data);
3110ff80 3403 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3404}
3405
3406static const struct rpc_call_ops nfs4_lock_ops = {
3407 .rpc_call_prepare = nfs4_lock_prepare,
3408 .rpc_call_done = nfs4_lock_done,
3409 .rpc_release = nfs4_lock_release,
3410};
3411
3412static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3413{
3414 struct nfs4_lockdata *data;
3415 struct rpc_task *task;
5138fde0
TM		 3416 struct rpc_message msg = {
3417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3418 .rpc_cred = state->owner->so_cred,
3419 };
c970aa85
TM		 3420 struct rpc_task_setup task_setup_data = {
3421 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3422 .rpc_message = &msg,
c970aa85 3423 .callback_ops = &nfs4_lock_ops,
101070ca 3424 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3425 .flags = RPC_TASK_ASYNC,
3426 };
a5d16a4d
TM		 3427 int ret;
3428
3110ff80 3429 dprintk("%s: begin!\n", __func__);
cd3758e3 3430 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3431 fl->fl_u.nfs4_fl.owner);
3432 if (data == NULL)
3433 return -ENOMEM;
3434 if (IS_SETLKW(cmd))
3435 data->arg.block = 1;
3436 if (reclaim != 0)
3437 data->arg.reclaim = 1;
5138fde0
TM		 3438 msg.rpc_argp = &data->arg,
3439 msg.rpc_resp = &data->res,
c970aa85
TM		 3440 task_setup_data.callback_data = data;
3441 task = rpc_run_task(&task_setup_data);
7a1218a2 3442 if (IS_ERR(task))
a5d16a4d 3443 return PTR_ERR(task);
a5d16a4d
TM		 3444 ret = nfs4_wait_for_completion_rpc_task(task);
3445 if (ret == 0) {
3446 ret = data->rpc_status;
3447 if (ret == -NFS4ERR_DENIED)
3448 ret = -EAGAIN;
3449 } else
3450 data->cancelled = 1;
e6b3c4db 3451 rpc_put_task(task);
3110ff80 3452 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3453 return ret;
1da177e4
LT		 3454}
3455
3456static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3457{
202b50dc
TM		 3458 struct nfs_server *server = NFS_SERVER(state->inode);
3459 struct nfs4_exception exception = { };
3460 int err;
3461
3462 do {
42a2d13e
TM		 3463 /* Cache the lock if possible... */
3464 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3465 return 0;
202b50dc
TM		 3466 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3467 if (err != -NFS4ERR_DELAY)
3468 break;
3469 nfs4_handle_exception(server, err, &exception);
3470 } while (exception.retry);
3471 return err;
1da177e4
LT		 3472}
3473
3474static int nfs4_lock_expired(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
6bfc93ef
TM		 3480 err = nfs4_set_lock_state(state, request);
3481 if (err != 0)
3482 return err;
202b50dc 3483 do {
42a2d13e
TM		 3484 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3485 return 0;
202b50dc
TM		 3486 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3487 if (err != -NFS4ERR_DELAY)
3488 break;
3489 nfs4_handle_exception(server, err, &exception);
3490 } while (exception.retry);
3491 return err;
1da177e4
LT		 3492}
3493
3494static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3495{
adfa6f98 3496 struct nfs_client *clp = state->owner->so_client;
01c3b861 3497 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3498 int status;
3499
6bfc93ef 3500 /* Is this a delegated open? */
6bfc93ef
TM		 3501 status = nfs4_set_lock_state(state, request);
3502 if (status != 0)
3503 goto out;
01c3b861
TM		 3504 request->fl_flags |= FL_ACCESS;
3505 status = do_vfs_lock(request->fl_file, request);
3506 if (status < 0)
3507 goto out;
3508 down_read(&clp->cl_sem);
3509 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3510 struct nfs_inode *nfsi = NFS_I(state->inode);
3511 /* Yes: cache locks! */
3512 down_read(&nfsi->rwsem);
3513 /* ...but avoid races with delegation recall... */
3514 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3515 request->fl_flags = fl_flags & ~FL_SLEEP;
3516 status = do_vfs_lock(request->fl_file, request);
3517 up_read(&nfsi->rwsem);
3518 goto out_unlock;
3519 }
3520 up_read(&nfsi->rwsem);
3521 }
6bfc93ef
TM		 3522 status = _nfs4_do_setlk(state, cmd, request, 0);
3523 if (status != 0)
01c3b861 3524 goto out_unlock;
6bfc93ef 3525 /* Note: we always want to sleep here! */
01c3b861 3526 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 3527 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 3528 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 3529out_unlock:
1da177e4 3530 up_read(&clp->cl_sem);
01c3b861
TM		 3531out:
3532 request->fl_flags = fl_flags;
1da177e4
LT		 3533 return status;
3534}
3535
3536static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3537{
3538 struct nfs4_exception exception = { };
3539 int err;
3540
3541 do {
3542 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3543 _nfs4_proc_setlk(state, cmd, request),
3544 &exception);
3545 } while (exception.retry);
3546 return err;
3547}
3548
3549static int
3550nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3551{
3552 struct nfs_open_context *ctx;
3553 struct nfs4_state *state;
3554 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3555 int status;
3556
3557 /* verify open state */
cd3758e3 3558 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3559 state = ctx->state;
3560
3561 if (request->fl_start < 0 || request->fl_end < 0)
3562 return -EINVAL;
3563
3564 if (IS_GETLK(cmd))
3565 return nfs4_proc_getlk(state, F_GETLK, request);
3566
3567 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3568 return -EINVAL;
3569
3570 if (request->fl_type == F_UNLCK)
3571 return nfs4_proc_unlck(state, cmd, request);
3572
3573 do {
3574 status = nfs4_proc_setlk(state, cmd, request);
3575 if ((status != -EAGAIN) || IS_SETLK(cmd))
3576 break;
3577 timeout = nfs4_set_lock_task_retry(timeout);
3578 status = -ERESTARTSYS;
3579 if (signalled())
3580 break;
3581 } while(status < 0);
1da177e4
LT		 3582 return status;
3583}
3584
888e694c
TM		 3585int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3586{
3587 struct nfs_server *server = NFS_SERVER(state->inode);
3588 struct nfs4_exception exception = { };
3589 int err;
3590
3591 err = nfs4_set_lock_state(state, fl);
3592 if (err != 0)
3593 goto out;
3594 do {
3595 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3596 if (err != -NFS4ERR_DELAY)
3597 break;
3598 err = nfs4_handle_exception(server, err, &exception);
3599 } while (exception.retry);
3600out:
3601 return err;
3602}
6b3b5496 3603
aa1870af
BF		 3604#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3605
6b3b5496
BF		 3606int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3607 size_t buflen, int flags)
3608{
4b580ee3
BF		 3609 struct inode *inode = dentry->d_inode;
3610
3611 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3612 return -EOPNOTSUPP;
3613
4b580ee3 3614 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3615}
3616
3617/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3618 * and that's what we'll do for e.g. user attributes that haven't been set.
3619 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3620 * attributes in kernel-managed attribute namespaces. */
3621ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3622 size_t buflen)
3623{
aa1870af
BF		 3624 struct inode *inode = dentry->d_inode;
3625
3626 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3627 return -EOPNOTSUPP;
3628
3629 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3630}
3631
3632ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3633{
aa1870af 3634 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3635
096455a2
BF		 3636 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3637 return 0;
6b3b5496
BF		 3638 if (buf && buflen < len)
3639 return -ERANGE;
3640 if (buf)
aa1870af
BF		 3641 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3642 return len;
6b3b5496
BF		 3643}
3644
56659e99 3645int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3646 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3647{
3648 struct nfs_server *server = NFS_SERVER(dir);
3649 u32 bitmask[2] = {
361e624f
MN		 3650 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3651 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3652 };
3653 struct nfs4_fs_locations_arg args = {
3654 .dir_fh = NFS_FH(dir),
c228fd3a 3655 .name = name,
683b57b4
TM		 3656 .page = page,
3657 .bitmask = bitmask,
3658 };
3659 struct rpc_message msg = {
3660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3661 .rpc_argp = &args,
7aaa0b3b 3662 .rpc_resp = fs_locations,
683b57b4
TM		 3663 };
3664 int status;
3665
3110ff80 3666 dprintk("%s: start\n", __func__);
c228fd3a 3667 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3668 fs_locations->server = server;
830b8e33 3669 fs_locations->nlocations = 0;
683b57b4 3670 status = rpc_call_sync(server->client, &msg, 0);
3110ff80 3671 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 3672 return status;
3673}
3674
1da177e4
LT		 3675struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3676 .recover_open = nfs4_open_reclaim,
3677 .recover_lock = nfs4_lock_reclaim,
3678};
3679
3680struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3681 .recover_open = nfs4_open_expired,
3682 .recover_lock = nfs4_lock_expired,
3683};
3684
92e1d5be 3685static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3686 .permission = nfs_permission,
3687 .getattr = nfs_getattr,
3688 .setattr = nfs_setattr,
3689 .getxattr = nfs4_getxattr,
3690 .setxattr = nfs4_setxattr,
3691 .listxattr = nfs4_listxattr,
3692};
3693
509de811 3694const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3695 .version = 4, /* protocol version */
3696 .dentry_ops = &nfs4_dentry_operations,
3697 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3698 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3699 .getroot = nfs4_proc_get_root,
3700 .getattr = nfs4_proc_getattr,
3701 .setattr = nfs4_proc_setattr,
2b3de441 3702 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3703 .lookup = nfs4_proc_lookup,
3704 .access = nfs4_proc_access,
3705 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3706 .create = nfs4_proc_create,
3707 .remove = nfs4_proc_remove,
3708 .unlink_setup = nfs4_proc_unlink_setup,
3709 .unlink_done = nfs4_proc_unlink_done,
3710 .rename = nfs4_proc_rename,
3711 .link = nfs4_proc_link,
3712 .symlink = nfs4_proc_symlink,
3713 .mkdir = nfs4_proc_mkdir,
3714 .rmdir = nfs4_proc_remove,
3715 .readdir = nfs4_proc_readdir,
3716 .mknod = nfs4_proc_mknod,
3717 .statfs = nfs4_proc_statfs,
3718 .fsinfo = nfs4_proc_fsinfo,
3719 .pathconf = nfs4_proc_pathconf,
e9326dca 3720 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3721 .decode_dirent = nfs4_decode_dirent,
3722 .read_setup = nfs4_proc_read_setup,
ec06c096 3723 .read_done = nfs4_read_done,
1da177e4 3724 .write_setup = nfs4_proc_write_setup,
788e7a89 3725 .write_done = nfs4_write_done,
1da177e4 3726 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3727 .commit_done = nfs4_commit_done,
02a913a7
TM		 3728 .file_open = nfs_open,
3729 .file_release = nfs_release,
1da177e4 3730 .lock = nfs4_proc_lock,
e50a1c2e 3731 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3732};
3733
3734/*
3735 * Local variables:
3736 * c-basic-offset: 8
3737 * End:
3738 */
Linux kernel - Deliverables
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