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SUNRPC: Add an rpc_credop callback for binding a credential to an rpc_task
[net-next-2.6.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
101070ca 54#include "internal.h"
006ea73e 55#include "iostat.h"
1da177e4
LT		 56
57#define NFSDBG_FACILITY NFSDBG_PROC
58
2066fe89 59#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 60#define NFS4_POLL_RETRY_MAX (15*HZ)
61
cdd4e68b 62struct nfs4_opendata;
864472e9 63static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 64static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
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",
76 __FUNCTION__, -err);
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;
243 p->o_res.server = p->o_arg.server;
244 nfs_fattr_init(&p->f_attr);
245 nfs_fattr_init(&p->dir_attr);
246}
247
ad389da7 248static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
e56e0b78
TM		 249 struct nfs4_state_owner *sp, int flags,
250 const struct iattr *attrs)
251{
ad389da7 252 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 253 struct inode *dir = parent->d_inode;
254 struct nfs_server *server = NFS_SERVER(dir);
255 struct nfs4_opendata *p;
256
257 p = kzalloc(sizeof(*p), GFP_KERNEL);
258 if (p == NULL)
259 goto err;
260 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
261 if (p->o_arg.seqid == NULL)
262 goto err_free;
ad389da7
TM		 263 p->path.mnt = mntget(path->mnt);
264 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 265 p->dir = parent;
266 p->owner = sp;
267 atomic_inc(&sp->so_count);
268 p->o_arg.fh = NFS_FH(dir);
269 p->o_arg.open_flags = flags,
7539bbab 270 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 271 p->o_arg.id = sp->so_owner_id.id;
ad389da7 272 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 273 p->o_arg.server = server;
274 p->o_arg.bitmask = server->attr_bitmask;
275 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 276 if (flags & O_EXCL) {
277 u32 *s = (u32 *) p->o_arg.u.verifier.data;
278 s[0] = jiffies;
279 s[1] = current->pid;
280 } else if (flags & O_CREAT) {
281 p->o_arg.u.attrs = &p->attrs;
282 memcpy(&p->attrs, attrs, sizeof(p->attrs));
283 }
cdd4e68b
TM		 284 p->c_arg.fh = &p->o_res.fh;
285 p->c_arg.stateid = &p->o_res.stateid;
286 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 287 nfs4_init_opendata_res(p);
c6d00e63 288 kref_init(&p->kref);
e56e0b78
TM		 289 return p;
290err_free:
291 kfree(p);
292err:
293 dput(parent);
294 return NULL;
295}
296
c6d00e63 297static void nfs4_opendata_free(struct kref *kref)
e56e0b78 298{
c6d00e63
TM		 299 struct nfs4_opendata *p = container_of(kref,
300 struct nfs4_opendata, kref);
301
302 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 303 if (p->state != NULL)
304 nfs4_put_open_state(p->state);
c6d00e63
TM		 305 nfs4_put_state_owner(p->owner);
306 dput(p->dir);
307 dput(p->path.dentry);
308 mntput(p->path.mnt);
309 kfree(p);
310}
311
312static void nfs4_opendata_put(struct nfs4_opendata *p)
313{
314 if (p != NULL)
315 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 316}
317
06f814a3
TM		 318static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
319{
06f814a3
TM		 320 int ret;
321
06f814a3 322 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 323 return ret;
324}
325
6ee41268
TM		 326static int can_open_cached(struct nfs4_state *state, int mode)
327{
328 int ret = 0;
329 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
330 case FMODE_READ:
331 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 332 break;
333 case FMODE_WRITE:
334 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 335 break;
336 case FMODE_READ|FMODE_WRITE:
337 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
338 }
339 return ret;
340}
341
aac00a8d
TM		 342static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
343{
344 if ((delegation->type & open_flags) != open_flags)
345 return 0;
346 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
347 return 0;
348 return 1;
349}
350
003707c7 351static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
e7616923
TM		 352{
353 switch (open_flags) {
354 case FMODE_WRITE:
355 state->n_wronly++;
356 break;
357 case FMODE_READ:
358 state->n_rdonly++;
359 break;
360 case FMODE_READ|FMODE_WRITE:
361 state->n_rdwr++;
362 }
003707c7
TM		 363 nfs4_state_set_mode_locked(state, state->state | open_flags);
364}
365
366static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
367{
368 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
369 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
370 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
371 switch (open_flags) {
372 case FMODE_READ:
373 set_bit(NFS_O_RDONLY_STATE, &state->flags);
374 break;
375 case FMODE_WRITE:
376 set_bit(NFS_O_WRONLY_STATE, &state->flags);
377 break;
378 case FMODE_READ|FMODE_WRITE:
379 set_bit(NFS_O_RDWR_STATE, &state->flags);
380 }
e7616923
TM		 381}
382
003707c7
TM		 383static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
384{
8bda4e4c 385 write_seqlock(&state->seqlock);
003707c7 386 nfs_set_open_stateid_locked(state, stateid, open_flags);
8bda4e4c 387 write_sequnlock(&state->seqlock);
003707c7
TM		 388}
389
390static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
1da177e4 391{
1da177e4 392 open_flags &= (FMODE_READ|FMODE_WRITE);
8bda4e4c
TM		 393 /*
394 * Protect the call to nfs4_state_set_mode_locked and
395 * serialise the stateid update
396 */
397 write_seqlock(&state->seqlock);
003707c7
TM		 398 if (deleg_stateid != NULL) {
399 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
400 set_bit(NFS_DELEGATED_STATE, &state->flags);
401 }
402 if (open_stateid != NULL)
403 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
8bda4e4c
TM		 404 write_sequnlock(&state->seqlock);
405 spin_lock(&state->owner->so_lock);
e7616923 406 update_open_stateflags(state, open_flags);
ec073428 407 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 408}
409
aac00a8d
TM		 410static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
411{
412 struct nfs_delegation *delegation;
413
414 rcu_read_lock();
415 delegation = rcu_dereference(NFS_I(inode)->delegation);
416 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
417 rcu_read_unlock();
418 return;
419 }
420 rcu_read_unlock();
421 nfs_inode_return_delegation(inode);
422}
423
6ee41268 424static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 425{
426 struct nfs4_state *state = opendata->state;
427 struct nfs_inode *nfsi = NFS_I(state->inode);
428 struct nfs_delegation *delegation;
429 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
430 nfs4_stateid stateid;
431 int ret = -EAGAIN;
432
433 rcu_read_lock();
434 delegation = rcu_dereference(nfsi->delegation);
aac00a8d 435 for (;;) {
6ee41268
TM		 436 if (can_open_cached(state, open_mode)) {
437 spin_lock(&state->owner->so_lock);
438 if (can_open_cached(state, open_mode)) {
439 update_open_stateflags(state, open_mode);
440 spin_unlock(&state->owner->so_lock);
441 rcu_read_unlock();
442 goto out_return_state;
443 }
444 spin_unlock(&state->owner->so_lock);
445 }
446 if (delegation == NULL)
447 break;
aac00a8d
TM		 448 if (!can_open_delegated(delegation, open_mode))
449 break;
450 /* Save the delegation */
451 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
452 rcu_read_unlock();
453 lock_kernel();
af22f94a 454 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 455 unlock_kernel();
456 if (ret != 0)
457 goto out;
458 ret = -EAGAIN;
459 rcu_read_lock();
460 delegation = rcu_dereference(nfsi->delegation);
6ee41268 461 /* If no delegation, try a cached open */
aac00a8d 462 if (delegation == NULL)
6ee41268 463 continue;
aac00a8d
TM		 464 /* Is the delegation still valid? */
465 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
466 continue;
467 rcu_read_unlock();
468 update_open_stateid(state, NULL, &stateid, open_mode);
469 goto out_return_state;
470 }
aac00a8d
TM		 471 rcu_read_unlock();
472out:
473 return ERR_PTR(ret);
474out_return_state:
475 atomic_inc(&state->count);
476 return state;
477}
478
24ac23ab
TM		 479static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
480{
481 struct inode *inode;
482 struct nfs4_state *state = NULL;
003707c7
TM		 483 struct nfs_delegation *delegation;
484 nfs4_stateid *deleg_stateid = NULL;
1b370bc2 485 int ret;
24ac23ab 486
aac00a8d 487 if (!data->rpc_done) {
6ee41268 488 state = nfs4_try_open_cached(data);
aac00a8d
TM		 489 goto out;
490 }
491
1b370bc2 492 ret = -EAGAIN;
24ac23ab 493 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 494 goto err;
24ac23ab 495 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 496 ret = PTR_ERR(inode);
03f28e3a 497 if (IS_ERR(inode))
1b370bc2
TM		 498 goto err;
499 ret = -ENOMEM;
24ac23ab
TM		 500 state = nfs4_get_open_state(inode, data->owner);
501 if (state == NULL)
1b370bc2 502 goto err_put_inode;
549d6ed5 503 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 504 int delegation_flags = 0;
505
003707c7
TM		 506 rcu_read_lock();
507 delegation = rcu_dereference(NFS_I(inode)->delegation);
508 if (delegation)
509 delegation_flags = delegation->flags;
510 rcu_read_unlock();
549d6ed5
TM		 511 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
512 nfs_inode_set_delegation(state->inode,
513 data->owner->so_cred,
514 &data->o_res);
515 else
516 nfs_inode_reclaim_delegation(state->inode,
517 data->owner->so_cred,
518 &data->o_res);
519 }
003707c7
TM		 520 rcu_read_lock();
521 delegation = rcu_dereference(NFS_I(inode)->delegation);
522 if (delegation != NULL)
523 deleg_stateid = &delegation->stateid;
524 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
525 rcu_read_unlock();
24ac23ab 526 iput(inode);
aac00a8d 527out:
24ac23ab 528 return state;
1b370bc2
TM		 529err_put_inode:
530 iput(inode);
531err:
532 return ERR_PTR(ret);
24ac23ab
TM		 533}
534
864472e9
TM		 535static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
536{
537 struct nfs_inode *nfsi = NFS_I(state->inode);
538 struct nfs_open_context *ctx;
539
540 spin_lock(&state->inode->i_lock);
541 list_for_each_entry(ctx, &nfsi->open_files, list) {
542 if (ctx->state != state)
543 continue;
544 get_nfs_open_context(ctx);
545 spin_unlock(&state->inode->i_lock);
546 return ctx;
547 }
548 spin_unlock(&state->inode->i_lock);
549 return ERR_PTR(-ENOENT);
550}
551
6f220ed5
TM		 552static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
553{
554 struct nfs4_opendata *opendata;
555
556 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
557 if (opendata == NULL)
558 return ERR_PTR(-ENOMEM);
559 opendata->state = state;
560 atomic_inc(&state->count);
561 return opendata;
562}
563
2ced46c2 564static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
864472e9 565{
2ced46c2 566 struct nfs4_state *newstate;
864472e9
TM		 567 int ret;
568
569 opendata->o_arg.open_flags = openflags;
2ced46c2
TM		 570 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
571 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
572 nfs4_init_opendata_res(opendata);
864472e9
TM		 573 ret = _nfs4_proc_open(opendata);
574 if (ret != 0)
575 return ret;
2ced46c2 576 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 577 if (IS_ERR(newstate))
578 return PTR_ERR(newstate);
579 nfs4_close_state(&opendata->path, newstate, openflags);
2ced46c2 580 *res = newstate;
864472e9
TM		 581 return 0;
582}
583
584static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
585{
864472e9 586 struct nfs4_state *newstate;
864472e9
TM		 587 int ret;
588
589 /* memory barrier prior to reading state->n_* */
2ced46c2 590 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 591 smp_rmb();
592 if (state->n_rdwr != 0) {
2ced46c2 593 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 594 if (ret != 0)
595 return ret;
2ced46c2
TM		 596 if (newstate != state)
597 return -ESTALE;
864472e9
TM		 598 }
599 if (state->n_wronly != 0) {
2ced46c2 600 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 601 if (ret != 0)
602 return ret;
2ced46c2
TM		 603 if (newstate != state)
604 return -ESTALE;
864472e9
TM		 605 }
606 if (state->n_rdonly != 0) {
2ced46c2 607 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 608 if (ret != 0)
609 return ret;
2ced46c2
TM		 610 if (newstate != state)
611 return -ESTALE;
864472e9 612 }
1ac7e2fd
TM		 613 /*
614 * We may have performed cached opens for all three recoveries.
615 * Check if we need to update the current stateid.
616 */
617 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
618 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 619 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 620 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
621 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 622 write_sequnlock(&state->seqlock);
1ac7e2fd 623 }
864472e9
TM		 624 return 0;
625}
626
1da177e4
LT		 627/*
628 * OPEN_RECLAIM:
629 * reclaim state on the server after a reboot.
1da177e4 630 */
539cd03a 631static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 632{
1ac7e2fd 633 struct nfs_delegation *delegation;
864472e9
TM		 634 struct nfs4_opendata *opendata;
635 int delegation_type = 0;
1da177e4
LT		 636 int status;
637
6f220ed5
TM		 638 opendata = nfs4_open_recoverdata_alloc(ctx, state);
639 if (IS_ERR(opendata))
640 return PTR_ERR(opendata);
864472e9
TM		 641 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
642 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 643 rcu_read_lock();
644 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
645 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
65bbf6bd 646 delegation_type = delegation->type;
1ac7e2fd 647 rcu_read_unlock();
864472e9
TM		 648 opendata->o_arg.u.delegation_type = delegation_type;
649 status = nfs4_open_recover(opendata, state);
c6d00e63 650 nfs4_opendata_put(opendata);
1da177e4
LT		 651 return status;
652}
653
539cd03a 654static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 655{
656 struct nfs_server *server = NFS_SERVER(state->inode);
657 struct nfs4_exception exception = { };
658 int err;
659 do {
539cd03a 660 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 661 if (err != -NFS4ERR_DELAY)
662 break;
663 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 664 } while (exception.retry);
665 return err;
666}
667
864472e9
TM		 668static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
669{
670 struct nfs_open_context *ctx;
671 int ret;
672
673 ctx = nfs4_state_find_open_context(state);
674 if (IS_ERR(ctx))
675 return PTR_ERR(ctx);
539cd03a 676 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 677 put_nfs_open_context(ctx);
678 return ret;
679}
680
13437e12 681static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 682{
e56e0b78 683 struct nfs4_opendata *opendata;
864472e9 684 int ret;
1da177e4 685
6f220ed5
TM		 686 opendata = nfs4_open_recoverdata_alloc(ctx, state);
687 if (IS_ERR(opendata))
688 return PTR_ERR(opendata);
e56e0b78 689 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 690 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 691 sizeof(opendata->o_arg.u.delegation.data));
864472e9 692 ret = nfs4_open_recover(opendata, state);
c6d00e63 693 nfs4_opendata_put(opendata);
864472e9 694 return ret;
1da177e4
LT		 695}
696
13437e12 697int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 698{
699 struct nfs4_exception exception = { };
539cd03a 700 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 701 int err;
702 do {
13437e12 703 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 704 switch (err) {
705 case 0:
706 return err;
707 case -NFS4ERR_STALE_CLIENTID:
708 case -NFS4ERR_STALE_STATEID:
709 case -NFS4ERR_EXPIRED:
710 /* Don't recall a delegation if it was lost */
7539bbab 711 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 712 return err;
713 }
714 err = nfs4_handle_exception(server, err, &exception);
715 } while (exception.retry);
716 return err;
717}
718
cdd4e68b
TM		 719static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
720{
721 struct nfs4_opendata *data = calldata;
722
723 data->rpc_status = task->tk_status;
724 if (RPC_ASSASSINATED(task))
725 return;
26e976a8 726 if (data->rpc_status == 0) {
cdd4e68b
TM		 727 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
728 sizeof(data->o_res.stateid.data));
bb22629e 729 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 730 renew_lease(data->o_res.server, data->timestamp);
3e309914 731 data->rpc_done = 1;
26e976a8 732 }
0f9f95e0 733 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
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 }
24ac23ab 863 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
3e309914 864 data->rpc_done = 1;
24ac23ab 865}
6f926b5b 866
24ac23ab
TM		 867static void nfs4_open_release(void *calldata)
868{
869 struct nfs4_opendata *data = calldata;
870 struct nfs4_state *state = NULL;
871
872 /* If this request hasn't been cancelled, do nothing */
873 if (data->cancelled == 0)
874 goto out_free;
875 /* In case of error, no cleanup! */
3e309914 876 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 877 goto out_free;
878 /* In case we need an open_confirm, no cleanup! */
879 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
880 goto out_free;
24ac23ab 881 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 882 if (!IS_ERR(state))
4a35bd41 883 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
24ac23ab 884out_free:
c6d00e63 885 nfs4_opendata_put(data);
24ac23ab
TM		 886}
887
888static const struct rpc_call_ops nfs4_open_ops = {
889 .rpc_call_prepare = nfs4_open_prepare,
890 .rpc_call_done = nfs4_open_done,
891 .rpc_release = nfs4_open_release,
892};
893
894/*
895 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
896 */
897static int _nfs4_proc_open(struct nfs4_opendata *data)
898{
899 struct inode *dir = data->dir->d_inode;
900 struct nfs_server *server = NFS_SERVER(dir);
901 struct nfs_openargs *o_arg = &data->o_arg;
902 struct nfs_openres *o_res = &data->o_res;
903 struct rpc_task *task;
5138fde0
TM		 904 struct rpc_message msg = {
905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
906 .rpc_argp = o_arg,
907 .rpc_resp = o_res,
908 .rpc_cred = data->owner->so_cred,
909 };
c970aa85
TM		 910 struct rpc_task_setup task_setup_data = {
911 .rpc_client = server->client,
5138fde0 912 .rpc_message = &msg,
c970aa85
TM		 913 .callback_ops = &nfs4_open_ops,
914 .callback_data = data,
101070ca 915 .workqueue = nfsiod_workqueue,
c970aa85
TM		 916 .flags = RPC_TASK_ASYNC,
917 };
24ac23ab
TM		 918 int status;
919
c6d00e63 920 kref_get(&data->kref);
3e309914
TM		 921 data->rpc_done = 0;
922 data->rpc_status = 0;
2ced46c2 923 data->cancelled = 0;
c970aa85 924 task = rpc_run_task(&task_setup_data);
7a1218a2 925 if (IS_ERR(task))
24ac23ab 926 return PTR_ERR(task);
24ac23ab
TM		 927 status = nfs4_wait_for_completion_rpc_task(task);
928 if (status != 0) {
929 data->cancelled = 1;
930 smp_wmb();
931 } else
932 status = data->rpc_status;
e6b3c4db 933 rpc_put_task(task);
3e309914 934 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 935 return status;
936
9936781d
TM		 937 if (o_res->fh.size == 0)
938 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
939
56ae19f3
TM		 940 if (o_arg->open_flags & O_CREAT) {
941 update_changeattr(dir, &o_res->cinfo);
942 nfs_post_op_update_inode(dir, o_res->dir_attr);
943 } else
944 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 945 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 946 status = _nfs4_proc_open_confirm(data);
1da177e4 947 if (status != 0)
24ac23ab 948 return status;
1da177e4
LT		 949 }
950 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 951 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 952 return 0;
1da177e4
LT		 953}
954
10afec90 955static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 956{
7539bbab 957 struct nfs_client *clp = server->nfs_client;
6b30954e 958 int ret;
58d9714a 959
6b30954e
TM		 960 for (;;) {
961 ret = nfs4_wait_clnt_recover(server->client, clp);
962 if (ret != 0)
963 return ret;
964 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
965 break;
58d9714a 966 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 967 }
968 return 0;
58d9714a
TM		 969}
970
1da177e4
LT		 971/*
972 * OPEN_EXPIRED:
973 * reclaim state on the server after a network partition.
974 * Assumes caller holds the appropriate lock
975 */
539cd03a 976static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 977{
e56e0b78 978 struct nfs4_opendata *opendata;
864472e9 979 int ret;
1da177e4 980
6f220ed5
TM		 981 opendata = nfs4_open_recoverdata_alloc(ctx, state);
982 if (IS_ERR(opendata))
983 return PTR_ERR(opendata);
864472e9
TM		 984 ret = nfs4_open_recover(opendata, state);
985 if (ret == -ESTALE) {
986 /* Invalidate the state owner so we don't ever use it again */
539cd03a
TM		 987 nfs4_drop_state_owner(state->owner);
988 d_drop(ctx->path.dentry);
1da177e4 989 }
c6d00e63 990 nfs4_opendata_put(opendata);
864472e9 991 return ret;
1da177e4
LT		 992}
993
539cd03a 994static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 995{
539cd03a 996 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 997 struct nfs4_exception exception = { };
998 int err;
999
1000 do {
539cd03a 1001 err = _nfs4_open_expired(ctx, state);
202b50dc
TM		 1002 if (err == -NFS4ERR_DELAY)
1003 nfs4_handle_exception(server, err, &exception);
1004 } while (exception.retry);
1005 return err;
1006}
1007
1da177e4
LT		 1008static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1009{
1da177e4 1010 struct nfs_open_context *ctx;
864472e9 1011 int ret;
1da177e4 1012
864472e9
TM		 1013 ctx = nfs4_state_find_open_context(state);
1014 if (IS_ERR(ctx))
1015 return PTR_ERR(ctx);
539cd03a 1016 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1017 put_nfs_open_context(ctx);
1018 return ret;
1da177e4
LT		 1019}
1020
aa53ed54
JL		 1021/*
1022 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1023 * fields corresponding to attributes that were used to store the verifier.
1024 * Make sure we clobber those fields in the later setattr call
1025 */
1026static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1027{
1028 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1029 !(sattr->ia_valid & ATTR_ATIME_SET))
1030 sattr->ia_valid |= ATTR_ATIME;
1031
1032 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1033 !(sattr->ia_valid & ATTR_MTIME_SET))
1034 sattr->ia_valid |= ATTR_MTIME;
1035}
1036
1da177e4 1037/*
24ac23ab 1038 * Returns a referenced nfs4_state
1da177e4 1039 */
ad389da7 1040static 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		 1041{
1042 struct nfs4_state_owner *sp;
1043 struct nfs4_state *state = NULL;
1044 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 1045 struct nfs_client *clp = server->nfs_client;
e56e0b78 1046 struct nfs4_opendata *opendata;
aac00a8d 1047 int status;
1da177e4
LT		 1048
1049 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1050 status = -ENOMEM;
1051 if (!(sp = nfs4_get_state_owner(server, cred))) {
1052 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1053 goto out_err;
1054 }
58d9714a
TM		 1055 status = nfs4_recover_expired_lease(server);
1056 if (status != 0)
b4454fe1 1057 goto err_put_state_owner;
aac00a8d
TM		 1058 if (path->dentry->d_inode != NULL)
1059 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
58d9714a
TM		 1060 down_read(&clp->cl_sem);
1061 status = -ENOMEM;
ad389da7 1062 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
e56e0b78 1063 if (opendata == NULL)
76723de0 1064 goto err_release_rwsem;
1da177e4 1065
aac00a8d
TM		 1066 if (path->dentry->d_inode != NULL)
1067 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1068
24ac23ab 1069 status = _nfs4_proc_open(opendata);
1da177e4 1070 if (status != 0)
c6d00e63 1071 goto err_opendata_put;
1da177e4 1072
aa53ed54
JL		 1073 if (opendata->o_arg.open_flags & O_EXCL)
1074 nfs4_exclusive_attrset(opendata, sattr);
1075
24ac23ab 1076 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1077 status = PTR_ERR(state);
1078 if (IS_ERR(state))
c6d00e63 1079 goto err_opendata_put;
c6d00e63 1080 nfs4_opendata_put(opendata);
1da177e4
LT		 1081 nfs4_put_state_owner(sp);
1082 up_read(&clp->cl_sem);
1083 *res = state;
1084 return 0;
c6d00e63
TM		 1085err_opendata_put:
1086 nfs4_opendata_put(opendata);
76723de0
TM		 1087err_release_rwsem:
1088 up_read(&clp->cl_sem);
e56e0b78
TM		 1089err_put_state_owner:
1090 nfs4_put_state_owner(sp);
1da177e4 1091out_err:
1da177e4
LT		 1092 *res = NULL;
1093 return status;
1094}
1095
1096
ad389da7 1097static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1098{
1099 struct nfs4_exception exception = { };
1100 struct nfs4_state *res;
1101 int status;
1102
1103 do {
ad389da7 1104 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1da177e4
LT		 1105 if (status == 0)
1106 break;
1107 /* NOTE: BAD_SEQID means the server and client disagree about the
1108 * book-keeping w.r.t. state-changing operations
1109 * (OPEN/CLOSE/LOCK/LOCKU...)
1110 * It is actually a sign of a bug on the client or on the server.
1111 *
1112 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1113 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1114 * have unhashed the old state_owner for us, and that we can
1115 * therefore safely retry using a new one. We should still warn
1116 * the user though...
1117 */
1118 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1119 printk(KERN_WARNING "NFS: v4 server %s "
1120 " returned a bad sequence-id error!\n",
1121 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1122 exception.retry = 1;
1123 continue;
1124 }
550f5747
TM		 1125 /*
1126 * BAD_STATEID on OPEN means that the server cancelled our
1127 * state before it received the OPEN_CONFIRM.
1128 * Recover by retrying the request as per the discussion
1129 * on Page 181 of RFC3530.
1130 */
1131 if (status == -NFS4ERR_BAD_STATEID) {
1132 exception.retry = 1;
1133 continue;
1134 }
aac00a8d
TM		 1135 if (status == -EAGAIN) {
1136 /* We must have found a delegation */
1137 exception.retry = 1;
1138 continue;
1139 }
1da177e4
LT		 1140 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1141 status, &exception));
1142 } while (exception.retry);
1143 return res;
1144}
1145
3e4f6290
TM		 1146static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1147 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1148{
3e4f6290 1149 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1150 struct nfs_setattrargs arg = {
3e4f6290 1151 .fh = NFS_FH(inode),
1da177e4
LT		 1152 .iap = sattr,
1153 .server = server,
1154 .bitmask = server->attr_bitmask,
1155 };
1156 struct nfs_setattrres res = {
1157 .fattr = fattr,
1158 .server = server,
1159 };
1160 struct rpc_message msg = {
1161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1162 .rpc_argp = &arg,
1163 .rpc_resp = &res,
1164 };
26e976a8 1165 unsigned long timestamp = jiffies;
65e4308d 1166 int status;
1da177e4 1167
0e574af1 1168 nfs_fattr_init(fattr);
1da177e4 1169
3e4f6290
TM		 1170 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1171 /* Use that stateid */
1172 } else if (state != NULL) {
1da177e4 1173 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1174 nfs4_copy_stateid(&arg.stateid, state, current->files);
1175 } else
1da177e4
LT		 1176 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1177
65e4308d 1178 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1179 if (status == 0 && state != NULL)
1180 renew_lease(server, timestamp);
65e4308d 1181 return status;
1da177e4
LT		 1182}
1183
3e4f6290
TM		 1184static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1185 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1186{
3e4f6290 1187 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1188 struct nfs4_exception exception = { };
1189 int err;
1190 do {
1191 err = nfs4_handle_exception(server,
3e4f6290 1192 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1193 &exception);
1194 } while (exception.retry);
1195 return err;
1196}
1197
1198struct nfs4_closedata {
4a35bd41 1199 struct path path;
1da177e4
LT		 1200 struct inode *inode;
1201 struct nfs4_state *state;
1202 struct nfs_closeargs arg;
1203 struct nfs_closeres res;
516a6af6 1204 struct nfs_fattr fattr;
26e976a8 1205 unsigned long timestamp;
1da177e4
LT		 1206};
1207
963d8fe5 1208static void nfs4_free_closedata(void *data)
9512135d 1209{
963d8fe5
TM		 1210 struct nfs4_closedata *calldata = data;
1211 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1212
1213 nfs4_put_open_state(calldata->state);
1214 nfs_free_seqid(calldata->arg.seqid);
9512135d 1215 nfs4_put_state_owner(sp);
4a35bd41
TM		 1216 dput(calldata->path.dentry);
1217 mntput(calldata->path.mnt);
9512135d
TM		 1218 kfree(calldata);
1219}
1220
963d8fe5 1221static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1222{
963d8fe5 1223 struct nfs4_closedata *calldata = data;
1da177e4 1224 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1225 struct nfs_server *server = NFS_SERVER(calldata->inode);
1226
4ce70ada
TM		 1227 if (RPC_ASSASSINATED(task))
1228 return;
1da177e4
LT		 1229 /* hmm. we are done with the inode, and in the process of freeing
1230 * the state_owner. we keep this around to process errors
1231 */
cee54fc9 1232 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1233 switch (task->tk_status) {
1234 case 0:
45328c35 1235 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1236 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1237 break;
1238 case -NFS4ERR_STALE_STATEID:
1239 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1240 break;
1241 default:
1242 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1243 rpc_restart_call(task);
1244 return;
1245 }
1246 }
516a6af6 1247 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1248}
1249
4ce70ada 1250static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1251{
4ce70ada 1252 struct nfs4_closedata *calldata = data;
9512135d 1253 struct nfs4_state *state = calldata->state;
003707c7 1254 int clear_rd, clear_wr, clear_rdwr;
9512135d 1255
963d8fe5 1256 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1257 return;
003707c7 1258
003707c7 1259 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1260 spin_lock(&state->owner->so_lock);
003707c7 1261 /* Calculate the change in open mode */
e7616923 1262 if (state->n_rdwr == 0) {
003707c7 1263 if (state->n_rdonly == 0) {
003707c7
TM		 1264 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1265 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1266 }
1267 if (state->n_wronly == 0) {
003707c7
TM		 1268 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1269 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1270 }
e7616923 1271 }
4cecb76f 1272 spin_unlock(&state->owner->so_lock);
003707c7 1273 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1274 /* Note: exit _without_ calling nfs4_close_done */
1275 task->tk_action = NULL;
9512135d
TM		 1276 return;
1277 }
516a6af6 1278 nfs_fattr_init(calldata->res.fattr);
45328c35 1279 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1280 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1281 calldata->arg.open_flags = FMODE_READ;
1282 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1283 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1284 calldata->arg.open_flags = FMODE_WRITE;
1285 }
26e976a8 1286 calldata->timestamp = jiffies;
5138fde0 1287 rpc_call_start(task);
1da177e4
LT		 1288}
1289
963d8fe5 1290static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1291 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1292 .rpc_call_done = nfs4_close_done,
1293 .rpc_release = nfs4_free_closedata,
1294};
1295
1da177e4
LT		 1296/*
1297 * It is possible for data to be read/written from a mem-mapped file
1298 * after the sys_close call (which hits the vfs layer as a flush).
1299 * This means that we can't safely call nfsv4 close on a file until
1300 * the inode is cleared. This in turn means that we are not good
1301 * NFSv4 citizens - we do not indicate to the server to update the file's
1302 * share state even when we are done with one of the three share
1303 * stateid's in the inode.
1304 *
1305 * NOTE: Caller must be holding the sp->so_owner semaphore!
1306 */
a49c3c77 1307int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1308{
4a35bd41 1309 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1310 struct nfs4_closedata *calldata;
b39e625b
TM		 1311 struct nfs4_state_owner *sp = state->owner;
1312 struct rpc_task *task;
5138fde0
TM		 1313 struct rpc_message msg = {
1314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1315 .rpc_cred = state->owner->so_cred,
1316 };
c970aa85
TM		 1317 struct rpc_task_setup task_setup_data = {
1318 .rpc_client = server->client,
5138fde0 1319 .rpc_message = &msg,
c970aa85 1320 .callback_ops = &nfs4_close_ops,
101070ca 1321 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1322 .flags = RPC_TASK_ASYNC,
1323 };
9512135d 1324 int status = -ENOMEM;
1da177e4 1325
9512135d 1326 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1327 if (calldata == NULL)
9512135d 1328 goto out;
4a35bd41 1329 calldata->inode = state->inode;
1da177e4 1330 calldata->state = state;
4a35bd41 1331 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1332 calldata->arg.stateid = &state->open_stateid;
1da177e4 1333 /* Serialization for the sequence id */
cee54fc9 1334 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1335 if (calldata->arg.seqid == NULL)
1336 goto out_free_calldata;
516a6af6
TM		 1337 calldata->arg.bitmask = server->attr_bitmask;
1338 calldata->res.fattr = &calldata->fattr;
1339 calldata->res.server = server;
4a35bd41
TM		 1340 calldata->path.mnt = mntget(path->mnt);
1341 calldata->path.dentry = dget(path->dentry);
9512135d 1342
5138fde0
TM		 1343 msg.rpc_argp = &calldata->arg,
1344 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1345 task_setup_data.callback_data = calldata;
1346 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1347 if (IS_ERR(task))
1348 return PTR_ERR(task);
a49c3c77
TM		 1349 status = 0;
1350 if (wait)
1351 status = rpc_wait_for_completion_task(task);
b39e625b 1352 rpc_put_task(task);
a49c3c77 1353 return status;
9512135d
TM		 1354out_free_calldata:
1355 kfree(calldata);
1356out:
b39e625b
TM		 1357 nfs4_put_open_state(state);
1358 nfs4_put_state_owner(sp);
9512135d 1359 return status;
1da177e4
LT		 1360}
1361
4a35bd41 1362static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM		 1363{
1364 struct file *filp;
1b45c46c 1365 int ret;
02a913a7 1366
1b45c46c
TM		 1367 /* If the open_intent is for execute, we have an extra check to make */
1368 if (nd->intent.open.flags & FMODE_EXEC) {
af22f94a 1369 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1370 state->owner->so_cred,
1371 nd->intent.open.flags);
1372 if (ret < 0)
1373 goto out_close;
1374 }
4a35bd41 1375 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1376 if (!IS_ERR(filp)) {
1377 struct nfs_open_context *ctx;
cd3758e3 1378 ctx = nfs_file_open_context(filp);
02a913a7 1379 ctx->state = state;
95cf959b
TM		 1380 return 0;
1381 }
1b45c46c
TM		 1382 ret = PTR_ERR(filp);
1383out_close:
a49c3c77 1384 nfs4_close_sync(path, state, nd->intent.open.flags);
1b45c46c 1385 return ret;
02a913a7
TM		 1386}
1387
1388struct dentry *
1da177e4
LT		 1389nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1390{
ad389da7 1391 struct path path = {
4ac91378 1392 .mnt = nd->path.mnt,
ad389da7
TM		 1393 .dentry = dentry,
1394 };
4ac91378 1395 struct dentry *parent;
1da177e4
LT		 1396 struct iattr attr;
1397 struct rpc_cred *cred;
1398 struct nfs4_state *state;
02a913a7 1399 struct dentry *res;
1da177e4
LT		 1400
1401 if (nd->flags & LOOKUP_CREATE) {
1402 attr.ia_mode = nd->intent.open.create_mode;
1403 attr.ia_valid = ATTR_MODE;
1404 if (!IS_POSIXACL(dir))
1405 attr.ia_mode &= ~current->fs->umask;
1406 } else {
1407 attr.ia_valid = 0;
1408 BUG_ON(nd->intent.open.flags & O_CREAT);
1409 }
1410
1f163415 1411 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4 1412 if (IS_ERR(cred))
02a913a7 1413 return (struct dentry *)cred;
565277f6
TM		 1414 parent = dentry->d_parent;
1415 /* Protect against concurrent sillydeletes */
1416 nfs_block_sillyrename(parent);
ad389da7 1417 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1418 put_rpccred(cred);
02a913a7 1419 if (IS_ERR(state)) {
d75340cc 1420 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1421 d_add(dentry, NULL);
d75340cc
TM		 1422 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1423 }
565277f6 1424 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1425 return (struct dentry *)state;
1426 }
24ac23ab 1427 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1428 if (res != NULL)
deee9369 1429 path.dentry = res;
d75340cc 1430 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1431 nfs_unblock_sillyrename(parent);
4a35bd41 1432 nfs4_intent_set_file(nd, &path, state);
02a913a7 1433 return res;
1da177e4
LT		 1434}
1435
1436int
02a913a7 1437nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1438{
ad389da7 1439 struct path path = {
4ac91378 1440 .mnt = nd->path.mnt,
ad389da7
TM		 1441 .dentry = dentry,
1442 };
1da177e4
LT		 1443 struct rpc_cred *cred;
1444 struct nfs4_state *state;
1da177e4 1445
1f163415 1446 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1447 if (IS_ERR(cred))
1448 return PTR_ERR(cred);
aac00a8d 1449 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1450 put_rpccred(cred);
02a913a7
TM		 1451 if (IS_ERR(state)) {
1452 switch (PTR_ERR(state)) {
1453 case -EPERM:
1454 case -EACCES:
1455 case -EDQUOT:
1456 case -ENOSPC:
1457 case -EROFS:
1458 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1459 return 1;
b87c0adf
CL		 1460 default:
1461 goto out_drop;
02a913a7 1462 }
02a913a7 1463 }
24ac23ab 1464 if (state->inode == dentry->d_inode) {
d75340cc 1465 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
4a35bd41 1466 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1467 return 1;
1468 }
a49c3c77 1469 nfs4_close_sync(&path, state, openflags);
02a913a7
TM		 1470out_drop:
1471 d_drop(dentry);
1da177e4
LT		 1472 return 0;
1473}
1474
1475
1476static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1477{
1478 struct nfs4_server_caps_res res = {};
1479 struct rpc_message msg = {
1480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1481 .rpc_argp = fhandle,
1482 .rpc_resp = &res,
1483 };
1484 int status;
1485
1486 status = rpc_call_sync(server->client, &msg, 0);
1487 if (status == 0) {
1488 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1489 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1490 server->caps |= NFS_CAP_ACLS;
1491 if (res.has_links != 0)
1492 server->caps |= NFS_CAP_HARDLINKS;
1493 if (res.has_symlinks != 0)
1494 server->caps |= NFS_CAP_SYMLINKS;
1495 server->acl_bitmask = res.acl_bitmask;
1496 }
1497 return status;
1498}
1499
55a97593 1500int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1501{
1502 struct nfs4_exception exception = { };
1503 int err;
1504 do {
1505 err = nfs4_handle_exception(server,
1506 _nfs4_server_capabilities(server, fhandle),
1507 &exception);
1508 } while (exception.retry);
1509 return err;
1510}
1511
1512static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1513 struct nfs_fsinfo *info)
1514{
1da177e4
LT		 1515 struct nfs4_lookup_root_arg args = {
1516 .bitmask = nfs4_fattr_bitmap,
1517 };
1518 struct nfs4_lookup_res res = {
1519 .server = server,
0e574af1 1520 .fattr = info->fattr,
1da177e4
LT		 1521 .fh = fhandle,
1522 };
1523 struct rpc_message msg = {
1524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1525 .rpc_argp = &args,
1526 .rpc_resp = &res,
1527 };
0e574af1 1528 nfs_fattr_init(info->fattr);
1da177e4
LT		 1529 return rpc_call_sync(server->client, &msg, 0);
1530}
1531
1532static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1533 struct nfs_fsinfo *info)
1534{
1535 struct nfs4_exception exception = { };
1536 int err;
1537 do {
1538 err = nfs4_handle_exception(server,
1539 _nfs4_lookup_root(server, fhandle, info),
1540 &exception);
1541 } while (exception.retry);
1542 return err;
1543}
1544
54ceac45
DH		 1545/*
1546 * get the file handle for the "/" directory on the server
1547 */
1da177e4 1548static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1549 struct nfs_fsinfo *info)
1da177e4 1550{
1da177e4
LT		 1551 int status;
1552
1da177e4 1553 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1554 if (status == 0)
1555 status = nfs4_server_capabilities(server, fhandle);
1556 if (status == 0)
1557 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1558 return nfs4_map_errors(status);
1da177e4
LT		 1559}
1560
6b97fd3d
MN		 1561/*
1562 * Get locations and (maybe) other attributes of a referral.
1563 * Note that we'll actually follow the referral later when
1564 * we detect fsid mismatch in inode revalidation
1565 */
56659e99 1566static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1567{
1568 int status = -ENOMEM;
1569 struct page *page = NULL;
1570 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1571
1572 page = alloc_page(GFP_KERNEL);
1573 if (page == NULL)
1574 goto out;
1575 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1576 if (locations == NULL)
1577 goto out;
1578
c228fd3a 1579 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1580 if (status != 0)
1581 goto out;
1582 /* Make sure server returned a different fsid for the referral */
1583 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1584 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1585 status = -EIO;
1586 goto out;
1587 }
1588
1589 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1590 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1591 if (!fattr->mode)
1592 fattr->mode = S_IFDIR;
1593 memset(fhandle, 0, sizeof(struct nfs_fh));
1594out:
1595 if (page)
1596 __free_page(page);
1597 if (locations)
1598 kfree(locations);
1599 return status;
1600}
1601
1da177e4
LT		 1602static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1603{
1604 struct nfs4_getattr_arg args = {
1605 .fh = fhandle,
1606 .bitmask = server->attr_bitmask,
1607 };
1608 struct nfs4_getattr_res res = {
1609 .fattr = fattr,
1610 .server = server,
1611 };
1612 struct rpc_message msg = {
1613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1614 .rpc_argp = &args,
1615 .rpc_resp = &res,
1616 };
1617
0e574af1 1618 nfs_fattr_init(fattr);
1da177e4
LT		 1619 return rpc_call_sync(server->client, &msg, 0);
1620}
1621
1622static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1623{
1624 struct nfs4_exception exception = { };
1625 int err;
1626 do {
1627 err = nfs4_handle_exception(server,
1628 _nfs4_proc_getattr(server, fhandle, fattr),
1629 &exception);
1630 } while (exception.retry);
1631 return err;
1632}
1633
1634/*
1635 * The file is not closed if it is opened due to the a request to change
1636 * the size of the file. The open call will not be needed once the
1637 * VFS layer lookup-intents are implemented.
1638 *
1639 * Close is called when the inode is destroyed.
1640 * If we haven't opened the file for O_WRONLY, we
1641 * need to in the size_change case to obtain a stateid.
1642 *
1643 * Got race?
1644 * Because OPEN is always done by name in nfsv4, it is
1645 * possible that we opened a different file by the same
1646 * name. We can recognize this race condition, but we
1647 * can't do anything about it besides returning an error.
1648 *
1649 * This will be fixed with VFS changes (lookup-intent).
1650 */
1651static int
1652nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1653 struct iattr *sattr)
1654{
08e9eac4
TM		 1655 struct rpc_cred *cred;
1656 struct inode *inode = dentry->d_inode;
d530838b
TM		 1657 struct nfs_open_context *ctx;
1658 struct nfs4_state *state = NULL;
1da177e4
LT		 1659 int status;
1660
0e574af1 1661 nfs_fattr_init(fattr);
1da177e4 1662
1f163415 1663 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
08e9eac4
TM		 1664 if (IS_ERR(cred))
1665 return PTR_ERR(cred);
d530838b
TM		 1666
1667 /* Search for an existing open(O_WRITE) file */
1668 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1669 if (ctx != NULL)
1670 state = ctx->state;
08e9eac4 1671
3e4f6290 1672 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1673 if (status == 0)
1674 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1675 if (ctx != NULL)
1676 put_nfs_open_context(ctx);
08e9eac4 1677 put_rpccred(cred);
1da177e4
LT		 1678 return status;
1679}
1680
56659e99
TM		 1681static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1682 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1683 struct nfs_fattr *fattr)
1684{
1685 int status;
1686 struct nfs4_lookup_arg args = {
1687 .bitmask = server->attr_bitmask,
1688 .dir_fh = dirfh,
1689 .name = name,
1690 };
1691 struct nfs4_lookup_res res = {
1692 .server = server,
1693 .fattr = fattr,
1694 .fh = fhandle,
1695 };
1696 struct rpc_message msg = {
1697 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1698 .rpc_argp = &args,
1699 .rpc_resp = &res,
1700 };
1701
1702 nfs_fattr_init(fattr);
1703
1704 dprintk("NFS call lookupfh %s\n", name->name);
1705 status = rpc_call_sync(server->client, &msg, 0);
1706 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1707 return status;
1708}
1709
1710static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1711 struct qstr *name, struct nfs_fh *fhandle,
1712 struct nfs_fattr *fattr)
1713{
1714 struct nfs4_exception exception = { };
1715 int err;
1716 do {
4e56e082
TM		 1717 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1718 /* FIXME: !!!! */
1719 if (err == -NFS4ERR_MOVED) {
1720 err = -EREMOTE;
1721 break;
1722 }
1723 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1724 } while (exception.retry);
1725 return err;
1726}
1727
56659e99 1728static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1729 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1730{
4e56e082 1731 int status;
1da177e4
LT		 1732
1733 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1734 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1735 if (status == -NFS4ERR_MOVED)
1736 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1737 dprintk("NFS reply lookup: %d\n", status);
1738 return status;
1739}
1740
1741static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1742{
1743 struct nfs4_exception exception = { };
1744 int err;
1745 do {
1746 err = nfs4_handle_exception(NFS_SERVER(dir),
1747 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1748 &exception);
1749 } while (exception.retry);
1750 return err;
1751}
1752
1753static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1754{
76b32999
TM		 1755 struct nfs_server *server = NFS_SERVER(inode);
1756 struct nfs_fattr fattr;
1da177e4
LT		 1757 struct nfs4_accessargs args = {
1758 .fh = NFS_FH(inode),
76b32999
TM		 1759 .bitmask = server->attr_bitmask,
1760 };
1761 struct nfs4_accessres res = {
1762 .server = server,
1763 .fattr = &fattr,
1da177e4 1764 };
1da177e4
LT		 1765 struct rpc_message msg = {
1766 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1767 .rpc_argp = &args,
1768 .rpc_resp = &res,
1769 .rpc_cred = entry->cred,
1770 };
1771 int mode = entry->mask;
1772 int status;
1773
1774 /*
1775 * Determine which access bits we want to ask for...
1776 */
1777 if (mode & MAY_READ)
1778 args.access |= NFS4_ACCESS_READ;
1779 if (S_ISDIR(inode->i_mode)) {
1780 if (mode & MAY_WRITE)
1781 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1782 if (mode & MAY_EXEC)
1783 args.access |= NFS4_ACCESS_LOOKUP;
1784 } else {
1785 if (mode & MAY_WRITE)
1786 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1787 if (mode & MAY_EXEC)
1788 args.access |= NFS4_ACCESS_EXECUTE;
1789 }
76b32999 1790 nfs_fattr_init(&fattr);
1da177e4
LT		 1791 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1792 if (!status) {
1793 entry->mask = 0;
1794 if (res.access & NFS4_ACCESS_READ)
1795 entry->mask |= MAY_READ;
1796 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1797 entry->mask |= MAY_WRITE;
1798 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1799 entry->mask |= MAY_EXEC;
76b32999 1800 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1801 }
1802 return status;
1803}
1804
1805static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1806{
1807 struct nfs4_exception exception = { };
1808 int err;
1809 do {
1810 err = nfs4_handle_exception(NFS_SERVER(inode),
1811 _nfs4_proc_access(inode, entry),
1812 &exception);
1813 } while (exception.retry);
1814 return err;
1815}
1816
1817/*
1818 * TODO: For the time being, we don't try to get any attributes
1819 * along with any of the zero-copy operations READ, READDIR,
1820 * READLINK, WRITE.
1821 *
1822 * In the case of the first three, we want to put the GETATTR
1823 * after the read-type operation -- this is because it is hard
1824 * to predict the length of a GETATTR response in v4, and thus
1825 * align the READ data correctly. This means that the GETATTR
1826 * may end up partially falling into the page cache, and we should
1827 * shift it into the 'tail' of the xdr_buf before processing.
1828 * To do this efficiently, we need to know the total length
1829 * of data received, which doesn't seem to be available outside
1830 * of the RPC layer.
1831 *
1832 * In the case of WRITE, we also want to put the GETATTR after
1833 * the operation -- in this case because we want to make sure
1834 * we get the post-operation mtime and size. This means that
1835 * we can't use xdr_encode_pages() as written: we need a variant
1836 * of it which would leave room in the 'tail' iovec.
1837 *
1838 * Both of these changes to the XDR layer would in fact be quite
1839 * minor, but I decided to leave them for a subsequent patch.
1840 */
1841static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1842 unsigned int pgbase, unsigned int pglen)
1843{
1844 struct nfs4_readlink args = {
1845 .fh = NFS_FH(inode),
1846 .pgbase = pgbase,
1847 .pglen = pglen,
1848 .pages = &page,
1849 };
1850 struct rpc_message msg = {
1851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1852 .rpc_argp = &args,
1853 .rpc_resp = NULL,
1854 };
1855
1856 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1857}
1858
1859static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1860 unsigned int pgbase, unsigned int pglen)
1861{
1862 struct nfs4_exception exception = { };
1863 int err;
1864 do {
1865 err = nfs4_handle_exception(NFS_SERVER(inode),
1866 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1867 &exception);
1868 } while (exception.retry);
1869 return err;
1870}
1871
1da177e4
LT		 1872/*
1873 * Got race?
1874 * We will need to arrange for the VFS layer to provide an atomic open.
1875 * Until then, this create/open method is prone to inefficiency and race
1876 * conditions due to the lookup, create, and open VFS calls from sys_open()
1877 * placed on the wire.
1878 *
1879 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1880 * The file will be opened again in the subsequent VFS open call
1881 * (nfs4_proc_file_open).
1882 *
1883 * The open for read will just hang around to be used by any process that
1884 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1885 */
1886
1887static int
1888nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1889 int flags, struct nameidata *nd)
1da177e4 1890{
ad389da7 1891 struct path path = {
4ac91378 1892 .mnt = nd->path.mnt,
ad389da7
TM		 1893 .dentry = dentry,
1894 };
1da177e4
LT		 1895 struct nfs4_state *state;
1896 struct rpc_cred *cred;
1897 int status = 0;
1898
1f163415 1899 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1900 if (IS_ERR(cred)) {
1901 status = PTR_ERR(cred);
1902 goto out;
1903 }
ad389da7 1904 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1da177e4 1905 put_rpccred(cred);
d4d9cdcb 1906 d_drop(dentry);
1da177e4
LT		 1907 if (IS_ERR(state)) {
1908 status = PTR_ERR(state);
1909 goto out;
1910 }
d4d9cdcb 1911 d_add(dentry, igrab(state->inode));
d75340cc 1912 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 1913 if (flags & O_EXCL) {
1914 struct nfs_fattr fattr;
3e4f6290 1915 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1916 if (status == 0)
65e4308d 1917 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 1918 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 1919 }
ad389da7 1920 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
4a35bd41 1921 status = nfs4_intent_set_file(nd, &path, state);
02a913a7 1922 else
a49c3c77 1923 nfs4_close_sync(&path, state, flags);
1da177e4
LT		 1924out:
1925 return status;
1926}
1927
1928static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1929{
16e42959 1930 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 1931 struct nfs_removeargs args = {
1da177e4 1932 .fh = NFS_FH(dir),
4fdc17b2
TM		 1933 .name.len = name->len,
1934 .name.name = name->name,
16e42959
TM		 1935 .bitmask = server->attr_bitmask,
1936 };
4fdc17b2 1937 struct nfs_removeres res = {
16e42959 1938 .server = server,
1da177e4 1939 };
1da177e4 1940 struct rpc_message msg = {
4fdc17b2
TM		 1941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1942 .rpc_argp = &args,
1943 .rpc_resp = &res,
1da177e4
LT		 1944 };
1945 int status;
1946
4fdc17b2 1947 nfs_fattr_init(&res.dir_attr);
16e42959
TM		 1948 status = rpc_call_sync(server->client, &msg, 0);
1949 if (status == 0) {
1950 update_changeattr(dir, &res.cinfo);
4fdc17b2 1951 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 1952 }
1da177e4
LT		 1953 return status;
1954}
1955
1956static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1957{
1958 struct nfs4_exception exception = { };
1959 int err;
1960 do {
1961 err = nfs4_handle_exception(NFS_SERVER(dir),
1962 _nfs4_proc_remove(dir, name),
1963 &exception);
1964 } while (exception.retry);
1965 return err;
1966}
1967
e4eff1a6 1968static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 1969{
e4eff1a6
TM		 1970 struct nfs_server *server = NFS_SERVER(dir);
1971 struct nfs_removeargs *args = msg->rpc_argp;
1972 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 1973
e4eff1a6
TM		 1974 args->bitmask = server->attr_bitmask;
1975 res->server = server;
1da177e4 1976 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 1977}
1978
e4eff1a6 1979static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 1980{
e4eff1a6
TM		 1981 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1982
1983 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1984 return 0;
1985 update_changeattr(dir, &res->cinfo);
1986 nfs_post_op_update_inode(dir, &res->dir_attr);
1987 return 1;
1da177e4
LT		 1988}
1989
1990static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1991 struct inode *new_dir, struct qstr *new_name)
1992{
6caf2c82 1993 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1994 struct nfs4_rename_arg arg = {
1995 .old_dir = NFS_FH(old_dir),
1996 .new_dir = NFS_FH(new_dir),
1997 .old_name = old_name,
1998 .new_name = new_name,
6caf2c82
TM		 1999 .bitmask = server->attr_bitmask,
2000 };
2001 struct nfs_fattr old_fattr, new_fattr;
2002 struct nfs4_rename_res res = {
2003 .server = server,
2004 .old_fattr = &old_fattr,
2005 .new_fattr = &new_fattr,
1da177e4 2006 };
1da177e4
LT		 2007 struct rpc_message msg = {
2008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2009 .rpc_argp = &arg,
2010 .rpc_resp = &res,
2011 };
2012 int status;
2013
6caf2c82
TM		 2014 nfs_fattr_init(res.old_fattr);
2015 nfs_fattr_init(res.new_fattr);
2016 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2017
2018 if (!status) {
2019 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2020 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2021 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2022 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2023 }
2024 return status;
2025}
2026
2027static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2028 struct inode *new_dir, struct qstr *new_name)
2029{
2030 struct nfs4_exception exception = { };
2031 int err;
2032 do {
2033 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2034 _nfs4_proc_rename(old_dir, old_name,
2035 new_dir, new_name),
2036 &exception);
2037 } while (exception.retry);
2038 return err;
2039}
2040
2041static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2042{
91ba2eee 2043 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2044 struct nfs4_link_arg arg = {
2045 .fh = NFS_FH(inode),
2046 .dir_fh = NFS_FH(dir),
2047 .name = name,
91ba2eee
TM		 2048 .bitmask = server->attr_bitmask,
2049 };
2050 struct nfs_fattr fattr, dir_attr;
2051 struct nfs4_link_res res = {
2052 .server = server,
2053 .fattr = &fattr,
2054 .dir_attr = &dir_attr,
1da177e4 2055 };
1da177e4
LT		 2056 struct rpc_message msg = {
2057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2058 .rpc_argp = &arg,
91ba2eee 2059 .rpc_resp = &res,
1da177e4
LT		 2060 };
2061 int status;
2062
91ba2eee
TM		 2063 nfs_fattr_init(res.fattr);
2064 nfs_fattr_init(res.dir_attr);
2065 status = rpc_call_sync(server->client, &msg, 0);
2066 if (!status) {
2067 update_changeattr(dir, &res.cinfo);
2068 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2069 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2070 }
1da177e4
LT		 2071
2072 return status;
2073}
2074
2075static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2076{
2077 struct nfs4_exception exception = { };
2078 int err;
2079 do {
2080 err = nfs4_handle_exception(NFS_SERVER(inode),
2081 _nfs4_proc_link(inode, dir, name),
2082 &exception);
2083 } while (exception.retry);
2084 return err;
2085}
2086
4f390c15 2087static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2088 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2089{
2090 struct nfs_server *server = NFS_SERVER(dir);
4f390c15
CL		 2091 struct nfs_fh fhandle;
2092 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2093 struct nfs4_create_arg arg = {
2094 .dir_fh = NFS_FH(dir),
2095 .server = server,
4f390c15 2096 .name = &dentry->d_name,
1da177e4
LT		 2097 .attrs = sattr,
2098 .ftype = NF4LNK,
2099 .bitmask = server->attr_bitmask,
2100 };
2101 struct nfs4_create_res res = {
2102 .server = server,
4f390c15
CL		 2103 .fh = &fhandle,
2104 .fattr = &fattr,
56ae19f3 2105 .dir_fattr = &dir_fattr,
1da177e4
LT		 2106 };
2107 struct rpc_message msg = {
2108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2109 .rpc_argp = &arg,
2110 .rpc_resp = &res,
2111 };
2112 int status;
2113
94a6d753 2114 if (len > NFS4_MAXPATHLEN)
1da177e4 2115 return -ENAMETOOLONG;
4f390c15 2116
94a6d753
CL		 2117 arg.u.symlink.pages = &page;
2118 arg.u.symlink.len = len;
4f390c15 2119 nfs_fattr_init(&fattr);
56ae19f3 2120 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2121
2122 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
4f390c15 2123 if (!status) {
1da177e4 2124 update_changeattr(dir, &res.dir_cinfo);
4f390c15
CL		 2125 nfs_post_op_update_inode(dir, res.dir_fattr);
2126 status = nfs_instantiate(dentry, &fhandle, &fattr);
2127 }
1da177e4
LT		 2128 return status;
2129}
2130
4f390c15 2131static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2132 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2133{
2134 struct nfs4_exception exception = { };
2135 int err;
2136 do {
2137 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2138 _nfs4_proc_symlink(dir, dentry, page,
2139 len, sattr),
1da177e4
LT		 2140 &exception);
2141 } while (exception.retry);
2142 return err;
2143}
2144
2145static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2146 struct iattr *sattr)
2147{
2148 struct nfs_server *server = NFS_SERVER(dir);
2149 struct nfs_fh fhandle;
56ae19f3 2150 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2151 struct nfs4_create_arg arg = {
2152 .dir_fh = NFS_FH(dir),
2153 .server = server,
2154 .name = &dentry->d_name,
2155 .attrs = sattr,
2156 .ftype = NF4DIR,
2157 .bitmask = server->attr_bitmask,
2158 };
2159 struct nfs4_create_res res = {
2160 .server = server,
2161 .fh = &fhandle,
2162 .fattr = &fattr,
56ae19f3 2163 .dir_fattr = &dir_fattr,
1da177e4
LT		 2164 };
2165 struct rpc_message msg = {
2166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2167 .rpc_argp = &arg,
2168 .rpc_resp = &res,
2169 };
2170 int status;
2171
0e574af1 2172 nfs_fattr_init(&fattr);
56ae19f3 2173 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2174
2175 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2176 if (!status) {
2177 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2178 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2179 status = nfs_instantiate(dentry, &fhandle, &fattr);
2180 }
2181 return status;
2182}
2183
2184static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2185 struct iattr *sattr)
2186{
2187 struct nfs4_exception exception = { };
2188 int err;
2189 do {
2190 err = nfs4_handle_exception(NFS_SERVER(dir),
2191 _nfs4_proc_mkdir(dir, dentry, sattr),
2192 &exception);
2193 } while (exception.retry);
2194 return err;
2195}
2196
2197static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2198 u64 cookie, struct page *page, unsigned int count, int plus)
2199{
2200 struct inode *dir = dentry->d_inode;
2201 struct nfs4_readdir_arg args = {
2202 .fh = NFS_FH(dir),
2203 .pages = &page,
2204 .pgbase = 0,
2205 .count = count,
2206 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2207 };
2208 struct nfs4_readdir_res res;
2209 struct rpc_message msg = {
2210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2211 .rpc_argp = &args,
2212 .rpc_resp = &res,
2213 .rpc_cred = cred,
2214 };
2215 int status;
2216
eadf4598
TM		 2217 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2218 dentry->d_parent->d_name.name,
2219 dentry->d_name.name,
2220 (unsigned long long)cookie);
1da177e4
LT		 2221 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2222 res.pgbase = args.pgbase;
2223 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2224 if (status == 0)
2225 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2226
2227 nfs_invalidate_atime(dir);
2228
eadf4598 2229 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2230 return status;
2231}
2232
2233static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2234 u64 cookie, struct page *page, unsigned int count, int plus)
2235{
2236 struct nfs4_exception exception = { };
2237 int err;
2238 do {
2239 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2240 _nfs4_proc_readdir(dentry, cred, cookie,
2241 page, count, plus),
2242 &exception);
2243 } while (exception.retry);
2244 return err;
2245}
2246
2247static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2248 struct iattr *sattr, dev_t rdev)
2249{
2250 struct nfs_server *server = NFS_SERVER(dir);
2251 struct nfs_fh fh;
56ae19f3 2252 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2253 struct nfs4_create_arg arg = {
2254 .dir_fh = NFS_FH(dir),
2255 .server = server,
2256 .name = &dentry->d_name,
2257 .attrs = sattr,
2258 .bitmask = server->attr_bitmask,
2259 };
2260 struct nfs4_create_res res = {
2261 .server = server,
2262 .fh = &fh,
2263 .fattr = &fattr,
56ae19f3 2264 .dir_fattr = &dir_fattr,
1da177e4
LT		 2265 };
2266 struct rpc_message msg = {
2267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2268 .rpc_argp = &arg,
2269 .rpc_resp = &res,
2270 };
2271 int status;
2272 int mode = sattr->ia_mode;
2273
0e574af1 2274 nfs_fattr_init(&fattr);
56ae19f3 2275 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2276
2277 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2278 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2279 if (S_ISFIFO(mode))
2280 arg.ftype = NF4FIFO;
2281 else if (S_ISBLK(mode)) {
2282 arg.ftype = NF4BLK;
2283 arg.u.device.specdata1 = MAJOR(rdev);
2284 arg.u.device.specdata2 = MINOR(rdev);
2285 }
2286 else if (S_ISCHR(mode)) {
2287 arg.ftype = NF4CHR;
2288 arg.u.device.specdata1 = MAJOR(rdev);
2289 arg.u.device.specdata2 = MINOR(rdev);
2290 }
2291 else
2292 arg.ftype = NF4SOCK;
2293
2294 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2295 if (status == 0) {
2296 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2297 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2298 status = nfs_instantiate(dentry, &fh, &fattr);
2299 }
2300 return status;
2301}
2302
2303static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2304 struct iattr *sattr, dev_t rdev)
2305{
2306 struct nfs4_exception exception = { };
2307 int err;
2308 do {
2309 err = nfs4_handle_exception(NFS_SERVER(dir),
2310 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2311 &exception);
2312 } while (exception.retry);
2313 return err;
2314}
2315
2316static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2317 struct nfs_fsstat *fsstat)
2318{
2319 struct nfs4_statfs_arg args = {
2320 .fh = fhandle,
2321 .bitmask = server->attr_bitmask,
2322 };
2323 struct rpc_message msg = {
2324 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2325 .rpc_argp = &args,
2326 .rpc_resp = fsstat,
2327 };
2328
0e574af1 2329 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2330 return rpc_call_sync(server->client, &msg, 0);
2331}
2332
2333static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2334{
2335 struct nfs4_exception exception = { };
2336 int err;
2337 do {
2338 err = nfs4_handle_exception(server,
2339 _nfs4_proc_statfs(server, fhandle, fsstat),
2340 &exception);
2341 } while (exception.retry);
2342 return err;
2343}
2344
2345static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2346 struct nfs_fsinfo *fsinfo)
2347{
2348 struct nfs4_fsinfo_arg args = {
2349 .fh = fhandle,
2350 .bitmask = server->attr_bitmask,
2351 };
2352 struct rpc_message msg = {
2353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2354 .rpc_argp = &args,
2355 .rpc_resp = fsinfo,
2356 };
2357
2358 return rpc_call_sync(server->client, &msg, 0);
2359}
2360
2361static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2362{
2363 struct nfs4_exception exception = { };
2364 int err;
2365
2366 do {
2367 err = nfs4_handle_exception(server,
2368 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2369 &exception);
2370 } while (exception.retry);
2371 return err;
2372}
2373
2374static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2375{
0e574af1 2376 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2377 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2378}
2379
2380static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2381 struct nfs_pathconf *pathconf)
2382{
2383 struct nfs4_pathconf_arg args = {
2384 .fh = fhandle,
2385 .bitmask = server->attr_bitmask,
2386 };
2387 struct rpc_message msg = {
2388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2389 .rpc_argp = &args,
2390 .rpc_resp = pathconf,
2391 };
2392
2393 /* None of the pathconf attributes are mandatory to implement */
2394 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2395 memset(pathconf, 0, sizeof(*pathconf));
2396 return 0;
2397 }
2398
0e574af1 2399 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2400 return rpc_call_sync(server->client, &msg, 0);
2401}
2402
2403static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2404 struct nfs_pathconf *pathconf)
2405{
2406 struct nfs4_exception exception = { };
2407 int err;
2408
2409 do {
2410 err = nfs4_handle_exception(server,
2411 _nfs4_proc_pathconf(server, fhandle, pathconf),
2412 &exception);
2413 } while (exception.retry);
2414 return err;
2415}
2416
ec06c096 2417static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2418{
ec06c096 2419 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2420
ec06c096 2421 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2422 rpc_restart_call(task);
ec06c096 2423 return -EAGAIN;
1da177e4 2424 }
8850df99
TM		 2425
2426 nfs_invalidate_atime(data->inode);
1da177e4 2427 if (task->tk_status > 0)
ec06c096
TM		 2428 renew_lease(server, data->timestamp);
2429 return 0;
1da177e4
LT		 2430}
2431
bdc7f021 2432static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2433{
1da177e4 2434 data->timestamp = jiffies;
bdc7f021 2435 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2436}
2437
788e7a89 2438static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2439{
1da177e4
LT		 2440 struct inode *inode = data->inode;
2441
2442 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2443 rpc_restart_call(task);
788e7a89 2444 return -EAGAIN;
1da177e4 2445 }
4f9838c7 2446 if (task->tk_status >= 0) {
1da177e4 2447 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2448 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2449 }
788e7a89 2450 return 0;
1da177e4
LT		 2451}
2452
bdc7f021 2453static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2454{
bdc7f021
TM		 2455 struct nfs_server *server = NFS_SERVER(data->inode);
2456
4f9838c7
TM		 2457 data->args.bitmask = server->attr_bitmask;
2458 data->res.server = server;
1da177e4
LT		 2459 data->timestamp = jiffies;
2460
bdc7f021 2461 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2462}
2463
788e7a89 2464static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2465{
1da177e4
LT		 2466 struct inode *inode = data->inode;
2467
2468 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2469 rpc_restart_call(task);
788e7a89 2470 return -EAGAIN;
1da177e4 2471 }
9e08a3c5 2472 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2473 return 0;
1da177e4
LT		 2474}
2475
bdc7f021 2476static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2477{
788e7a89 2478 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2479
4f9838c7
TM		 2480 data->args.bitmask = server->attr_bitmask;
2481 data->res.server = server;
bdc7f021 2482 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2483}
2484
2485/*
2486 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2487 * standalone procedure for queueing an asynchronous RENEW.
2488 */
963d8fe5 2489static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2490{
adfa6f98 2491 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2492 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2493
2494 if (task->tk_status < 0) {
2495 switch (task->tk_status) {
2496 case -NFS4ERR_STALE_CLIENTID:
2497 case -NFS4ERR_EXPIRED:
2498 case -NFS4ERR_CB_PATH_DOWN:
2499 nfs4_schedule_state_recovery(clp);
2500 }
2501 return;
2502 }
2503 spin_lock(&clp->cl_lock);
2504 if (time_before(clp->cl_last_renewal,timestamp))
2505 clp->cl_last_renewal = timestamp;
2506 spin_unlock(&clp->cl_lock);
2507}
2508
963d8fe5
TM		 2509static const struct rpc_call_ops nfs4_renew_ops = {
2510 .rpc_call_done = nfs4_renew_done,
2511};
2512
adfa6f98 2513int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2514{
2515 struct rpc_message msg = {
2516 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2517 .rpc_argp = clp,
b4454fe1 2518 .rpc_cred = cred,
1da177e4
LT		 2519 };
2520
2521 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2522 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2523}
2524
adfa6f98 2525int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2526{
2527 struct rpc_message msg = {
2528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2529 .rpc_argp = clp,
b4454fe1 2530 .rpc_cred = cred,
1da177e4
LT		 2531 };
2532 unsigned long now = jiffies;
2533 int status;
2534
2535 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2536 if (status < 0)
2537 return status;
2538 spin_lock(&clp->cl_lock);
2539 if (time_before(clp->cl_last_renewal,now))
2540 clp->cl_last_renewal = now;
2541 spin_unlock(&clp->cl_lock);
2542 return 0;
2543}
2544
aa1870af
BF		 2545static inline int nfs4_server_supports_acls(struct nfs_server *server)
2546{
2547 return (server->caps & NFS_CAP_ACLS)
2548 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2549 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2550}
2551
2552/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2553 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2554 * the stack.
2555 */
2556#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2557
2558static void buf_to_pages(const void *buf, size_t buflen,
2559 struct page **pages, unsigned int *pgbase)
2560{
2561 const void *p = buf;
2562
2563 *pgbase = offset_in_page(buf);
2564 p -= *pgbase;
2565 while (p < buf + buflen) {
2566 *(pages++) = virt_to_page(p);
2567 p += PAGE_CACHE_SIZE;
2568 }
2569}
2570
e50a1c2e
BF		 2571struct nfs4_cached_acl {
2572 int cached;
2573 size_t len;
3e9d4154 2574 char data[0];
e50a1c2e
BF		 2575};
2576
2577static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2578{
2579 struct nfs_inode *nfsi = NFS_I(inode);
2580
2581 spin_lock(&inode->i_lock);
2582 kfree(nfsi->nfs4_acl);
2583 nfsi->nfs4_acl = acl;
2584 spin_unlock(&inode->i_lock);
2585}
2586
2587static void nfs4_zap_acl_attr(struct inode *inode)
2588{
2589 nfs4_set_cached_acl(inode, NULL);
2590}
2591
2592static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2593{
2594 struct nfs_inode *nfsi = NFS_I(inode);
2595 struct nfs4_cached_acl *acl;
2596 int ret = -ENOENT;
2597
2598 spin_lock(&inode->i_lock);
2599 acl = nfsi->nfs4_acl;
2600 if (acl == NULL)
2601 goto out;
2602 if (buf == NULL) /* user is just asking for length */
2603 goto out_len;
2604 if (acl->cached == 0)
2605 goto out;
2606 ret = -ERANGE; /* see getxattr(2) man page */
2607 if (acl->len > buflen)
2608 goto out;
2609 memcpy(buf, acl->data, acl->len);
2610out_len:
2611 ret = acl->len;
2612out:
2613 spin_unlock(&inode->i_lock);
2614 return ret;
2615}
2616
2617static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2618{
2619 struct nfs4_cached_acl *acl;
2620
2621 if (buf && acl_len <= PAGE_SIZE) {
2622 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2623 if (acl == NULL)
2624 goto out;
2625 acl->cached = 1;
2626 memcpy(acl->data, buf, acl_len);
2627 } else {
2628 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2629 if (acl == NULL)
2630 goto out;
2631 acl->cached = 0;
2632 }
2633 acl->len = acl_len;
2634out:
2635 nfs4_set_cached_acl(inode, acl);
2636}
2637
16b4289c 2638static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2639{
aa1870af
BF		 2640 struct page *pages[NFS4ACL_MAXPAGES];
2641 struct nfs_getaclargs args = {
2642 .fh = NFS_FH(inode),
2643 .acl_pages = pages,
2644 .acl_len = buflen,
2645 };
2646 size_t resp_len = buflen;
e50a1c2e 2647 void *resp_buf;
aa1870af
BF		 2648 struct rpc_message msg = {
2649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2650 .rpc_argp = &args,
2651 .rpc_resp = &resp_len,
2652 };
e50a1c2e 2653 struct page *localpage = NULL;
aa1870af
BF		 2654 int ret;
2655
e50a1c2e
BF		 2656 if (buflen < PAGE_SIZE) {
2657 /* As long as we're doing a round trip to the server anyway,
2658 * let's be prepared for a page of acl data. */
2659 localpage = alloc_page(GFP_KERNEL);
2660 resp_buf = page_address(localpage);
2661 if (localpage == NULL)
2662 return -ENOMEM;
2663 args.acl_pages[0] = localpage;
2664 args.acl_pgbase = 0;
1d95db8e 2665 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2666 } else {
2667 resp_buf = buf;
2668 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2669 }
aa1870af 2670 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2671 if (ret)
2672 goto out_free;
2673 if (resp_len > args.acl_len)
2674 nfs4_write_cached_acl(inode, NULL, resp_len);
2675 else
2676 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2677 if (buf) {
2678 ret = -ERANGE;
2679 if (resp_len > buflen)
2680 goto out_free;
2681 if (localpage)
2682 memcpy(buf, resp_buf, resp_len);
2683 }
2684 ret = resp_len;
2685out_free:
2686 if (localpage)
2687 __free_page(localpage);
aa1870af
BF		 2688 return ret;
2689}
2690
16b4289c
TM		 2691static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2692{
2693 struct nfs4_exception exception = { };
2694 ssize_t ret;
2695 do {
2696 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2697 if (ret >= 0)
2698 break;
2699 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2700 } while (exception.retry);
2701 return ret;
2702}
2703
e50a1c2e
BF		 2704static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2705{
2706 struct nfs_server *server = NFS_SERVER(inode);
2707 int ret;
2708
2709 if (!nfs4_server_supports_acls(server))
2710 return -EOPNOTSUPP;
2711 ret = nfs_revalidate_inode(server, inode);
2712 if (ret < 0)
2713 return ret;
2714 ret = nfs4_read_cached_acl(inode, buf, buflen);
2715 if (ret != -ENOENT)
2716 return ret;
2717 return nfs4_get_acl_uncached(inode, buf, buflen);
2718}
2719
16b4289c 2720static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2721{
2722 struct nfs_server *server = NFS_SERVER(inode);
2723 struct page *pages[NFS4ACL_MAXPAGES];
2724 struct nfs_setaclargs arg = {
2725 .fh = NFS_FH(inode),
2726 .acl_pages = pages,
2727 .acl_len = buflen,
2728 };
2729 struct rpc_message msg = {
2730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2731 .rpc_argp = &arg,
2732 .rpc_resp = NULL,
2733 };
2734 int ret;
2735
2736 if (!nfs4_server_supports_acls(server))
2737 return -EOPNOTSUPP;
642ac549 2738 nfs_inode_return_delegation(inode);
4b580ee3 2739 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2740 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
08efa202 2741 nfs_zap_caches(inode);
4b580ee3
BF		 2742 return ret;
2743}
2744
16b4289c
TM		 2745static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2746{
2747 struct nfs4_exception exception = { };
2748 int err;
2749 do {
2750 err = nfs4_handle_exception(NFS_SERVER(inode),
2751 __nfs4_proc_set_acl(inode, buf, buflen),
2752 &exception);
2753 } while (exception.retry);
2754 return err;
2755}
2756
1da177e4 2757static int
faf5f49c 2758nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2759{
7539bbab 2760 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2761
2762 if (!clp || task->tk_status >= 0)
2763 return 0;
2764 switch(task->tk_status) {
2765 case -NFS4ERR_STALE_CLIENTID:
2766 case -NFS4ERR_STALE_STATEID:
2767 case -NFS4ERR_EXPIRED:
5d00837b 2768 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 2769 nfs4_schedule_state_recovery(clp);
433fbe4c 2770 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
fda13939 2771 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 2772 task->tk_status = 0;
2773 return -EAGAIN;
1da177e4 2774 case -NFS4ERR_DELAY:
006ea73e
CL		 2775 nfs_inc_server_stats((struct nfs_server *) server,
2776 NFSIOS_DELAY);
2777 case -NFS4ERR_GRACE:
1da177e4
LT		 2778 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2779 task->tk_status = 0;
2780 return -EAGAIN;
2781 case -NFS4ERR_OLD_STATEID:
2782 task->tk_status = 0;
2783 return -EAGAIN;
2784 }
2785 task->tk_status = nfs4_map_errors(task->tk_status);
2786 return 0;
2787}
2788
150030b7 2789static int nfs4_wait_bit_killable(void *word)
433fbe4c 2790{
150030b7 2791 if (fatal_signal_pending(current))
433fbe4c
TM		 2792 return -ERESTARTSYS;
2793 schedule();
2794 return 0;
2795}
2796
adfa6f98 2797static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2798{
433fbe4c 2799 int res;
1da177e4
LT		 2800
2801 might_sleep();
2802
e148582e
TM		 2803 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2804
433fbe4c 2805 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
150030b7 2806 nfs4_wait_bit_killable, TASK_KILLABLE);
e148582e
TM		 2807
2808 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT		 2809 return res;
2810}
2811
2812static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2813{
1da177e4
LT		 2814 int res = 0;
2815
2816 might_sleep();
2817
2818 if (*timeout <= 0)
2819 *timeout = NFS4_POLL_RETRY_MIN;
2820 if (*timeout > NFS4_POLL_RETRY_MAX)
2821 *timeout = NFS4_POLL_RETRY_MAX;
150030b7
MW		 2822 schedule_timeout_killable(*timeout);
2823 if (fatal_signal_pending(current))
2824 res = -ERESTARTSYS;
1da177e4
LT		 2825 *timeout <<= 1;
2826 return res;
2827}
2828
2829/* This is the error handling routine for processes that are allowed
2830 * to sleep.
2831 */
10afec90 2832static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2833{
7539bbab 2834 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2835 int ret = errorcode;
2836
2837 exception->retry = 0;
2838 switch(errorcode) {
2839 case 0:
2840 return 0;
2841 case -NFS4ERR_STALE_CLIENTID:
2842 case -NFS4ERR_STALE_STATEID:
2843 case -NFS4ERR_EXPIRED:
433fbe4c 2844 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2845 ret = nfs4_wait_clnt_recover(server->client, clp);
2846 if (ret == 0)
2847 exception->retry = 1;
2848 break;
c514983d 2849 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2850 case -NFS4ERR_GRACE:
2851 case -NFS4ERR_DELAY:
2852 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2853 if (ret != 0)
2854 break;
1da177e4 2855 case -NFS4ERR_OLD_STATEID:
2c56617d 2856 exception->retry = 1;
1da177e4
LT		 2857 }
2858 /* We failed to handle the error */
2859 return nfs4_map_errors(ret);
2860}
2861
adfa6f98 2862int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2863{
2864 nfs4_verifier sc_verifier;
2865 struct nfs4_setclientid setclientid = {
2866 .sc_verifier = &sc_verifier,
2867 .sc_prog = program,
2868 };
2869 struct rpc_message msg = {
2870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2871 .rpc_argp = &setclientid,
2872 .rpc_resp = clp,
286d7d6a 2873 .rpc_cred = cred,
1da177e4 2874 };
bc4785cd 2875 __be32 *p;
1da177e4
LT		 2876 int loop = 0;
2877 int status;
2878
bc4785cd 2879 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2880 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2881 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2882
2883 for(;;) {
2884 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 2885 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 2886 clp->cl_ipaddr,
2887 rpc_peeraddr2str(clp->cl_rpcclient,
2888 RPC_DISPLAY_ADDR),
69dd716c
TM		 2889 rpc_peeraddr2str(clp->cl_rpcclient,
2890 RPC_DISPLAY_PROTO),
286d7d6a 2891 cred->cr_ops->cr_name,
1da177e4
LT		 2892 clp->cl_id_uniquifier);
2893 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 2894 sizeof(setclientid.sc_netid),
2895 rpc_peeraddr2str(clp->cl_rpcclient,
2896 RPC_DISPLAY_NETID));
1da177e4 2897 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 2898 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 2899 clp->cl_ipaddr, port >> 8, port & 255);
2900
2901 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2902 if (status != -NFS4ERR_CLID_INUSE)
2903 break;
2904 if (signalled())
2905 break;
2906 if (loop++ & 1)
2907 ssleep(clp->cl_lease_time + 1);
2908 else
2909 if (++clp->cl_id_uniquifier == 0)
2910 break;
2911 }
2912 return status;
2913}
2914
adfa6f98 2915static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2916{
2917 struct nfs_fsinfo fsinfo;
2918 struct rpc_message msg = {
2919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2920 .rpc_argp = clp,
2921 .rpc_resp = &fsinfo,
286d7d6a 2922 .rpc_cred = cred,
1da177e4
LT		 2923 };
2924 unsigned long now;
2925 int status;
2926
2927 now = jiffies;
2928 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2929 if (status == 0) {
2930 spin_lock(&clp->cl_lock);
2931 clp->cl_lease_time = fsinfo.lease_time * HZ;
2932 clp->cl_last_renewal = now;
58d9714a 2933 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2934 spin_unlock(&clp->cl_lock);
2935 }
2936 return status;
2937}
2938
adfa6f98 2939int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM		 2940{
2941 long timeout;
2942 int err;
2943 do {
2944 err = _nfs4_proc_setclientid_confirm(clp, cred);
2945 switch (err) {
2946 case 0:
2947 return err;
2948 case -NFS4ERR_RESOURCE:
2949 /* The IBM lawyers misread another document! */
2950 case -NFS4ERR_DELAY:
2951 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2952 }
2953 } while (err == 0);
2954 return err;
2955}
2956
fe650407
TM		 2957struct nfs4_delegreturndata {
2958 struct nfs4_delegreturnargs args;
fa178f29 2959 struct nfs4_delegreturnres res;
fe650407
TM		 2960 struct nfs_fh fh;
2961 nfs4_stateid stateid;
26e976a8 2962 unsigned long timestamp;
fa178f29 2963 struct nfs_fattr fattr;
fe650407
TM		 2964 int rpc_status;
2965};
2966
fe650407
TM		 2967static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2968{
2969 struct nfs4_delegreturndata *data = calldata;
2970 data->rpc_status = task->tk_status;
26e976a8 2971 if (data->rpc_status == 0)
fa178f29 2972 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 2973}
2974
2975static void nfs4_delegreturn_release(void *calldata)
2976{
fe650407
TM		 2977 kfree(calldata);
2978}
2979
c8d149f3 2980static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 2981 .rpc_call_done = nfs4_delegreturn_done,
2982 .rpc_release = nfs4_delegreturn_release,
2983};
2984
e6f81075 2985static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 2986{
2987 struct nfs4_delegreturndata *data;
fa178f29 2988 struct nfs_server *server = NFS_SERVER(inode);
fe650407 2989 struct rpc_task *task;
5138fde0
TM		 2990 struct rpc_message msg = {
2991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2992 .rpc_cred = cred,
2993 };
c970aa85
TM		 2994 struct rpc_task_setup task_setup_data = {
2995 .rpc_client = server->client,
5138fde0 2996 .rpc_message = &msg,
c970aa85
TM		 2997 .callback_ops = &nfs4_delegreturn_ops,
2998 .flags = RPC_TASK_ASYNC,
2999 };
e6f81075 3000 int status = 0;
fe650407
TM		 3001
3002 data = kmalloc(sizeof(*data), GFP_KERNEL);
3003 if (data == NULL)
3004 return -ENOMEM;
3005 data->args.fhandle = &data->fh;
3006 data->args.stateid = &data->stateid;
fa178f29 3007 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3008 nfs_copy_fh(&data->fh, NFS_FH(inode));
3009 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3010 data->res.fattr = &data->fattr;
3011 data->res.server = server;
5138fde0 3012 nfs_fattr_init(data->res.fattr);
26e976a8 3013 data->timestamp = jiffies;
fe650407
TM		 3014 data->rpc_status = 0;
3015
c970aa85 3016 task_setup_data.callback_data = data;
5138fde0
TM		 3017 msg.rpc_argp = &data->args,
3018 msg.rpc_resp = &data->res,
c970aa85 3019 task = rpc_run_task(&task_setup_data);
7a1218a2 3020 if (IS_ERR(task))
fe650407 3021 return PTR_ERR(task);
e6f81075
TM		 3022 if (!issync)
3023 goto out;
fe650407 3024 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3025 if (status != 0)
3026 goto out;
3027 status = data->rpc_status;
3028 if (status != 0)
3029 goto out;
3030 nfs_refresh_inode(inode, &data->fattr);
3031out:
e6b3c4db 3032 rpc_put_task(task);
fe650407 3033 return status;
1da177e4
LT		 3034}
3035
e6f81075 3036int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3037{
3038 struct nfs_server *server = NFS_SERVER(inode);
3039 struct nfs4_exception exception = { };
3040 int err;
3041 do {
e6f81075 3042 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3043 switch (err) {
3044 case -NFS4ERR_STALE_STATEID:
3045 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3046 case 0:
3047 return 0;
3048 }
3049 err = nfs4_handle_exception(server, err, &exception);
3050 } while (exception.retry);
3051 return err;
3052}
3053
3054#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3055#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3056
3057/*
3058 * sleep, with exponential backoff, and retry the LOCK operation.
3059 */
3060static unsigned long
3061nfs4_set_lock_task_retry(unsigned long timeout)
3062{
150030b7 3063 schedule_timeout_killable(timeout);
1da177e4
LT		 3064 timeout <<= 1;
3065 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3066 return NFS4_LOCK_MAXTIMEOUT;
3067 return timeout;
3068}
3069
1da177e4
LT		 3070static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3071{
3072 struct inode *inode = state->inode;
3073 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3074 struct nfs_client *clp = server->nfs_client;
911d1aaf 3075 struct nfs_lockt_args arg = {
1da177e4 3076 .fh = NFS_FH(inode),
911d1aaf 3077 .fl = request,
1da177e4 3078 };
911d1aaf
TM		 3079 struct nfs_lockt_res res = {
3080 .denied = request,
1da177e4
LT		 3081 };
3082 struct rpc_message msg = {
3083 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3084 .rpc_argp = &arg,
3085 .rpc_resp = &res,
3086 .rpc_cred = state->owner->so_cred,
3087 };
1da177e4
LT		 3088 struct nfs4_lock_state *lsp;
3089 int status;
3090
3091 down_read(&clp->cl_sem);
911d1aaf 3092 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3093 status = nfs4_set_lock_state(state, request);
3094 if (status != 0)
3095 goto out;
3096 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3097 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3098 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3099 switch (status) {
3100 case 0:
3101 request->fl_type = F_UNLCK;
3102 break;
3103 case -NFS4ERR_DENIED:
3104 status = 0;
1da177e4 3105 }
70cc6487 3106 request->fl_ops->fl_release_private(request);
8d0a8a9d 3107out:
1da177e4
LT		 3108 up_read(&clp->cl_sem);
3109 return status;
3110}
3111
3112static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3113{
3114 struct nfs4_exception exception = { };
3115 int err;
3116
3117 do {
3118 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3119 _nfs4_proc_getlk(state, cmd, request),
3120 &exception);
3121 } while (exception.retry);
3122 return err;
3123}
3124
3125static int do_vfs_lock(struct file *file, struct file_lock *fl)
3126{
3127 int res = 0;
3128 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3129 case FL_POSIX:
3130 res = posix_lock_file_wait(file, fl);
3131 break;
3132 case FL_FLOCK:
3133 res = flock_lock_file_wait(file, fl);
3134 break;
3135 default:
3136 BUG();
3137 }
1da177e4
LT		 3138 return res;
3139}
3140
faf5f49c 3141struct nfs4_unlockdata {
911d1aaf
TM		 3142 struct nfs_locku_args arg;
3143 struct nfs_locku_res res;
faf5f49c
TM		 3144 struct nfs4_lock_state *lsp;
3145 struct nfs_open_context *ctx;
911d1aaf
TM		 3146 struct file_lock fl;
3147 const struct nfs_server *server;
26e976a8 3148 unsigned long timestamp;
faf5f49c
TM		 3149};
3150
911d1aaf
TM		 3151static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3152 struct nfs_open_context *ctx,
3153 struct nfs4_lock_state *lsp,
3154 struct nfs_seqid *seqid)
3155{
3156 struct nfs4_unlockdata *p;
3157 struct inode *inode = lsp->ls_state->inode;
3158
3159 p = kmalloc(sizeof(*p), GFP_KERNEL);
3160 if (p == NULL)
3161 return NULL;
3162 p->arg.fh = NFS_FH(inode);
3163 p->arg.fl = &p->fl;
3164 p->arg.seqid = seqid;
3165 p->arg.stateid = &lsp->ls_stateid;
3166 p->lsp = lsp;
3167 atomic_inc(&lsp->ls_count);
3168 /* Ensure we don't close file until we're done freeing locks! */
3169 p->ctx = get_nfs_open_context(ctx);
3170 memcpy(&p->fl, fl, sizeof(p->fl));
3171 p->server = NFS_SERVER(inode);
3172 return p;
3173}
3174
06f814a3 3175static void nfs4_locku_release_calldata(void *data)
faf5f49c 3176{
963d8fe5 3177 struct nfs4_unlockdata *calldata = data;
911d1aaf 3178 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3179 nfs4_put_lock_state(calldata->lsp);
3180 put_nfs_open_context(calldata->ctx);
3181 kfree(calldata);
faf5f49c
TM		 3182}
3183
963d8fe5 3184static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3185{
963d8fe5 3186 struct nfs4_unlockdata *calldata = data;
faf5f49c 3187
06f814a3
TM		 3188 if (RPC_ASSASSINATED(task))
3189 return;
911d1aaf 3190 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3191 switch (task->tk_status) {
3192 case 0:
3193 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3194 calldata->res.stateid.data,
faf5f49c 3195 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3196 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3197 break;
3198 case -NFS4ERR_STALE_STATEID:
3199 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3200 break;
3201 default:
a6a352e9 3202 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
faf5f49c 3203 rpc_restart_call(task);
faf5f49c 3204 }
faf5f49c
TM		 3205}
3206
4ce70ada 3207static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3208{
4ce70ada 3209 struct nfs4_unlockdata *calldata = data;
faf5f49c 3210
911d1aaf 3211 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3212 return;
3213 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3214 /* Note: exit _without_ running nfs4_locku_done */
3215 task->tk_action = NULL;
faf5f49c
TM		 3216 return;
3217 }
26e976a8 3218 calldata->timestamp = jiffies;
5138fde0 3219 rpc_call_start(task);
faf5f49c
TM		 3220}
3221
963d8fe5 3222static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3223 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3224 .rpc_call_done = nfs4_locku_done,
06f814a3 3225 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3226};
3227
a5d16a4d
TM		 3228static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3229 struct nfs_open_context *ctx,
3230 struct nfs4_lock_state *lsp,
3231 struct nfs_seqid *seqid)
3232{
3233 struct nfs4_unlockdata *data;
5138fde0
TM		 3234 struct rpc_message msg = {
3235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3236 .rpc_cred = ctx->cred,
3237 };
c970aa85
TM		 3238 struct rpc_task_setup task_setup_data = {
3239 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3240 .rpc_message = &msg,
c970aa85 3241 .callback_ops = &nfs4_locku_ops,
101070ca 3242 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3243 .flags = RPC_TASK_ASYNC,
3244 };
a5d16a4d 3245
137d6aca
FF		 3246 /* Ensure this is an unlock - when canceling a lock, the
3247 * canceled lock is passed in, and it won't be an unlock.
3248 */
3249 fl->fl_type = F_UNLCK;
3250
a5d16a4d
TM		 3251 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3252 if (data == NULL) {
3253 nfs_free_seqid(seqid);
3254 return ERR_PTR(-ENOMEM);
3255 }
3256
5138fde0
TM		 3257 msg.rpc_argp = &data->arg,
3258 msg.rpc_resp = &data->res,
c970aa85
TM		 3259 task_setup_data.callback_data = data;
3260 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3261}
3262
faf5f49c
TM		 3263static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3264{
911d1aaf 3265 struct nfs_seqid *seqid;
1da177e4 3266 struct nfs4_lock_state *lsp;
06f814a3
TM		 3267 struct rpc_task *task;
3268 int status = 0;
faf5f49c 3269
8d0a8a9d 3270 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3271 /* Unlock _before_ we do the RPC call */
3272 request->fl_flags |= FL_EXISTS;
3273 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3274 goto out;
8d0a8a9d 3275 if (status != 0)
9b073574
TM		 3276 goto out;
3277 /* Is this a delegated lock? */
3278 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3279 goto out;
8d0a8a9d 3280 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3281 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3282 status = -ENOMEM;
911d1aaf 3283 if (seqid == NULL)
9b073574 3284 goto out;
cd3758e3 3285 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3286 status = PTR_ERR(task);
3287 if (IS_ERR(task))
9b073574 3288 goto out;
a5d16a4d 3289 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3290 rpc_put_task(task);
9b073574 3291out:
1da177e4
LT		 3292 return status;
3293}
3294
a5d16a4d
TM		 3295struct nfs4_lockdata {
3296 struct nfs_lock_args arg;
3297 struct nfs_lock_res res;
3298 struct nfs4_lock_state *lsp;
3299 struct nfs_open_context *ctx;
3300 struct file_lock fl;
26e976a8 3301 unsigned long timestamp;
a5d16a4d
TM		 3302 int rpc_status;
3303 int cancelled;
3304};
3305
3306static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3307 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3308{
a5d16a4d
TM		 3309 struct nfs4_lockdata *p;
3310 struct inode *inode = lsp->ls_state->inode;
1da177e4 3311 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3312
3313 p = kzalloc(sizeof(*p), GFP_KERNEL);
3314 if (p == NULL)
3315 return NULL;
3316
3317 p->arg.fh = NFS_FH(inode);
3318 p->arg.fl = &p->fl;
2f74c0a0
TM		 3319 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3320 if (p->arg.open_seqid == NULL)
3321 goto out_free;
a5d16a4d
TM		 3322 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3323 if (p->arg.lock_seqid == NULL)
2f74c0a0 3324 goto out_free_seqid;
a5d16a4d 3325 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3326 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3327 p->arg.lock_owner.id = lsp->ls_id.id;
a5d16a4d
TM		 3328 p->lsp = lsp;
3329 atomic_inc(&lsp->ls_count);
3330 p->ctx = get_nfs_open_context(ctx);
3331 memcpy(&p->fl, fl, sizeof(p->fl));
3332 return p;
2f74c0a0
TM		 3333out_free_seqid:
3334 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3335out_free:
3336 kfree(p);
3337 return NULL;
3338}
3339
3340static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3341{
3342 struct nfs4_lockdata *data = calldata;
3343 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3344
a5d16a4d 3345 dprintk("%s: begin!\n", __FUNCTION__);
2f74c0a0
TM		 3346 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3347 return;
a5d16a4d
TM		 3348 /* Do we need to do an open_to_lock_owner? */
3349 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3350 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3351 return;
a5d16a4d
TM		 3352 data->arg.open_stateid = &state->stateid;
3353 data->arg.new_lock_owner = 1;
2f74c0a0
TM		 3354 } else
3355 data->arg.new_lock_owner = 0;
26e976a8 3356 data->timestamp = jiffies;
5138fde0 3357 rpc_call_start(task);
a5d16a4d
TM		 3358 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3359}
3360
3361static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3362{
3363 struct nfs4_lockdata *data = calldata;
3364
3365 dprintk("%s: begin!\n", __FUNCTION__);
3366
3367 data->rpc_status = task->tk_status;
3368 if (RPC_ASSASSINATED(task))
3369 goto out;
3370 if (data->arg.new_lock_owner != 0) {
3371 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3372 if (data->rpc_status == 0)
3373 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3374 else
3375 goto out;
3376 }
3377 if (data->rpc_status == 0) {
3378 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3379 sizeof(data->lsp->ls_stateid.data));
3380 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3381 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3382 }
3383 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3384out:
3385 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3386}
3387
3388static void nfs4_lock_release(void *calldata)
3389{
3390 struct nfs4_lockdata *data = calldata;
3391
3392 dprintk("%s: begin!\n", __FUNCTION__);
2f74c0a0 3393 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3394 if (data->cancelled != 0) {
3395 struct rpc_task *task;
3396 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3397 data->arg.lock_seqid);
3398 if (!IS_ERR(task))
e6b3c4db 3399 rpc_put_task(task);
a5d16a4d
TM		 3400 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3401 } else
3402 nfs_free_seqid(data->arg.lock_seqid);
3403 nfs4_put_lock_state(data->lsp);
3404 put_nfs_open_context(data->ctx);
3405 kfree(data);
3406 dprintk("%s: done!\n", __FUNCTION__);
3407}
3408
3409static const struct rpc_call_ops nfs4_lock_ops = {
3410 .rpc_call_prepare = nfs4_lock_prepare,
3411 .rpc_call_done = nfs4_lock_done,
3412 .rpc_release = nfs4_lock_release,
3413};
3414
3415static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3416{
3417 struct nfs4_lockdata *data;
3418 struct rpc_task *task;
5138fde0
TM		 3419 struct rpc_message msg = {
3420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3421 .rpc_cred = state->owner->so_cred,
3422 };
c970aa85
TM		 3423 struct rpc_task_setup task_setup_data = {
3424 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3425 .rpc_message = &msg,
c970aa85 3426 .callback_ops = &nfs4_lock_ops,
101070ca 3427 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3428 .flags = RPC_TASK_ASYNC,
3429 };
a5d16a4d
TM		 3430 int ret;
3431
3432 dprintk("%s: begin!\n", __FUNCTION__);
cd3758e3 3433 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3434 fl->fl_u.nfs4_fl.owner);
3435 if (data == NULL)
3436 return -ENOMEM;
3437 if (IS_SETLKW(cmd))
3438 data->arg.block = 1;
3439 if (reclaim != 0)
3440 data->arg.reclaim = 1;
5138fde0
TM		 3441 msg.rpc_argp = &data->arg,
3442 msg.rpc_resp = &data->res,
c970aa85
TM		 3443 task_setup_data.callback_data = data;
3444 task = rpc_run_task(&task_setup_data);
7a1218a2 3445 if (IS_ERR(task))
a5d16a4d 3446 return PTR_ERR(task);
a5d16a4d
TM		 3447 ret = nfs4_wait_for_completion_rpc_task(task);
3448 if (ret == 0) {
3449 ret = data->rpc_status;
3450 if (ret == -NFS4ERR_DENIED)
3451 ret = -EAGAIN;
3452 } else
3453 data->cancelled = 1;
e6b3c4db 3454 rpc_put_task(task);
a5d16a4d
TM		 3455 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3456 return ret;
1da177e4
LT		 3457}
3458
3459static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3460{
202b50dc
TM		 3461 struct nfs_server *server = NFS_SERVER(state->inode);
3462 struct nfs4_exception exception = { };
3463 int err;
3464
3465 do {
42a2d13e
TM		 3466 /* Cache the lock if possible... */
3467 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3468 return 0;
202b50dc
TM		 3469 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3470 if (err != -NFS4ERR_DELAY)
3471 break;
3472 nfs4_handle_exception(server, err, &exception);
3473 } while (exception.retry);
3474 return err;
1da177e4
LT		 3475}
3476
3477static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3478{
202b50dc
TM		 3479 struct nfs_server *server = NFS_SERVER(state->inode);
3480 struct nfs4_exception exception = { };
3481 int err;
3482
6bfc93ef
TM		 3483 err = nfs4_set_lock_state(state, request);
3484 if (err != 0)
3485 return err;
202b50dc 3486 do {
42a2d13e
TM		 3487 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3488 return 0;
202b50dc
TM		 3489 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3490 if (err != -NFS4ERR_DELAY)
3491 break;
3492 nfs4_handle_exception(server, err, &exception);
3493 } while (exception.retry);
3494 return err;
1da177e4
LT		 3495}
3496
3497static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3498{
adfa6f98 3499 struct nfs_client *clp = state->owner->so_client;
01c3b861 3500 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3501 int status;
3502
6bfc93ef 3503 /* Is this a delegated open? */
6bfc93ef
TM		 3504 status = nfs4_set_lock_state(state, request);
3505 if (status != 0)
3506 goto out;
01c3b861
TM		 3507 request->fl_flags |= FL_ACCESS;
3508 status = do_vfs_lock(request->fl_file, request);
3509 if (status < 0)
3510 goto out;
3511 down_read(&clp->cl_sem);
3512 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3513 struct nfs_inode *nfsi = NFS_I(state->inode);
3514 /* Yes: cache locks! */
3515 down_read(&nfsi->rwsem);
3516 /* ...but avoid races with delegation recall... */
3517 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3518 request->fl_flags = fl_flags & ~FL_SLEEP;
3519 status = do_vfs_lock(request->fl_file, request);
3520 up_read(&nfsi->rwsem);
3521 goto out_unlock;
3522 }
3523 up_read(&nfsi->rwsem);
3524 }
6bfc93ef
TM		 3525 status = _nfs4_do_setlk(state, cmd, request, 0);
3526 if (status != 0)
01c3b861 3527 goto out_unlock;
6bfc93ef 3528 /* Note: we always want to sleep here! */
01c3b861 3529 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef
TM		 3530 if (do_vfs_lock(request->fl_file, request) < 0)
3531 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
01c3b861 3532out_unlock:
1da177e4 3533 up_read(&clp->cl_sem);
01c3b861
TM		 3534out:
3535 request->fl_flags = fl_flags;
1da177e4
LT		 3536 return status;
3537}
3538
3539static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3540{
3541 struct nfs4_exception exception = { };
3542 int err;
3543
3544 do {
3545 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3546 _nfs4_proc_setlk(state, cmd, request),
3547 &exception);
3548 } while (exception.retry);
3549 return err;
3550}
3551
3552static int
3553nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3554{
3555 struct nfs_open_context *ctx;
3556 struct nfs4_state *state;
3557 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3558 int status;
3559
3560 /* verify open state */
cd3758e3 3561 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3562 state = ctx->state;
3563
3564 if (request->fl_start < 0 || request->fl_end < 0)
3565 return -EINVAL;
3566
3567 if (IS_GETLK(cmd))
3568 return nfs4_proc_getlk(state, F_GETLK, request);
3569
3570 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3571 return -EINVAL;
3572
3573 if (request->fl_type == F_UNLCK)
3574 return nfs4_proc_unlck(state, cmd, request);
3575
3576 do {
3577 status = nfs4_proc_setlk(state, cmd, request);
3578 if ((status != -EAGAIN) || IS_SETLK(cmd))
3579 break;
3580 timeout = nfs4_set_lock_task_retry(timeout);
3581 status = -ERESTARTSYS;
3582 if (signalled())
3583 break;
3584 } while(status < 0);
1da177e4
LT		 3585 return status;
3586}
3587
888e694c
TM		 3588int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3589{
3590 struct nfs_server *server = NFS_SERVER(state->inode);
3591 struct nfs4_exception exception = { };
3592 int err;
3593
3594 err = nfs4_set_lock_state(state, fl);
3595 if (err != 0)
3596 goto out;
3597 do {
3598 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3599 if (err != -NFS4ERR_DELAY)
3600 break;
3601 err = nfs4_handle_exception(server, err, &exception);
3602 } while (exception.retry);
3603out:
3604 return err;
3605}
6b3b5496 3606
aa1870af
BF		 3607#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3608
6b3b5496
BF		 3609int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3610 size_t buflen, int flags)
3611{
4b580ee3
BF		 3612 struct inode *inode = dentry->d_inode;
3613
3614 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3615 return -EOPNOTSUPP;
3616
4b580ee3 3617 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3618}
3619
3620/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3621 * and that's what we'll do for e.g. user attributes that haven't been set.
3622 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3623 * attributes in kernel-managed attribute namespaces. */
3624ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3625 size_t buflen)
3626{
aa1870af
BF		 3627 struct inode *inode = dentry->d_inode;
3628
3629 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3630 return -EOPNOTSUPP;
3631
3632 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3633}
3634
3635ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3636{
aa1870af 3637 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3638
096455a2
BF		 3639 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3640 return 0;
6b3b5496
BF		 3641 if (buf && buflen < len)
3642 return -ERANGE;
3643 if (buf)
aa1870af
BF		 3644 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3645 return len;
6b3b5496
BF		 3646}
3647
56659e99 3648int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3649 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3650{
3651 struct nfs_server *server = NFS_SERVER(dir);
3652 u32 bitmask[2] = {
361e624f
MN		 3653 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3654 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3655 };
3656 struct nfs4_fs_locations_arg args = {
3657 .dir_fh = NFS_FH(dir),
c228fd3a 3658 .name = name,
683b57b4
TM		 3659 .page = page,
3660 .bitmask = bitmask,
3661 };
3662 struct rpc_message msg = {
3663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3664 .rpc_argp = &args,
7aaa0b3b 3665 .rpc_resp = fs_locations,
683b57b4
TM		 3666 };
3667 int status;
3668
3669 dprintk("%s: start\n", __FUNCTION__);
c228fd3a 3670 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3671 fs_locations->server = server;
830b8e33 3672 fs_locations->nlocations = 0;
683b57b4
TM		 3673 status = rpc_call_sync(server->client, &msg, 0);
3674 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3675 return status;
3676}
3677
1da177e4
LT		 3678struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3679 .recover_open = nfs4_open_reclaim,
3680 .recover_lock = nfs4_lock_reclaim,
3681};
3682
3683struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3684 .recover_open = nfs4_open_expired,
3685 .recover_lock = nfs4_lock_expired,
3686};
3687
92e1d5be 3688static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3689 .permission = nfs_permission,
3690 .getattr = nfs_getattr,
3691 .setattr = nfs_setattr,
3692 .getxattr = nfs4_getxattr,
3693 .setxattr = nfs4_setxattr,
3694 .listxattr = nfs4_listxattr,
3695};
3696
509de811 3697const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3698 .version = 4, /* protocol version */
3699 .dentry_ops = &nfs4_dentry_operations,
3700 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3701 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3702 .getroot = nfs4_proc_get_root,
3703 .getattr = nfs4_proc_getattr,
3704 .setattr = nfs4_proc_setattr,
2b3de441 3705 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3706 .lookup = nfs4_proc_lookup,
3707 .access = nfs4_proc_access,
3708 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3709 .create = nfs4_proc_create,
3710 .remove = nfs4_proc_remove,
3711 .unlink_setup = nfs4_proc_unlink_setup,
3712 .unlink_done = nfs4_proc_unlink_done,
3713 .rename = nfs4_proc_rename,
3714 .link = nfs4_proc_link,
3715 .symlink = nfs4_proc_symlink,
3716 .mkdir = nfs4_proc_mkdir,
3717 .rmdir = nfs4_proc_remove,
3718 .readdir = nfs4_proc_readdir,
3719 .mknod = nfs4_proc_mknod,
3720 .statfs = nfs4_proc_statfs,
3721 .fsinfo = nfs4_proc_fsinfo,
3722 .pathconf = nfs4_proc_pathconf,
e9326dca 3723 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3724 .decode_dirent = nfs4_decode_dirent,
3725 .read_setup = nfs4_proc_read_setup,
ec06c096 3726 .read_done = nfs4_read_done,
1da177e4 3727 .write_setup = nfs4_proc_write_setup,
788e7a89 3728 .write_done = nfs4_write_done,
1da177e4 3729 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3730 .commit_done = nfs4_commit_done,
02a913a7
TM		 3731 .file_open = nfs_open,
3732 .file_release = nfs_release,
1da177e4 3733 .lock = nfs4_proc_lock,
e50a1c2e 3734 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3735};
3736
3737/*
3738 * Local variables:
3739 * c-basic-offset: 8
3740 * End:
3741 */
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