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NFSv4: Don't tell server we rebooted when not necessary
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
101070ca 54#include "internal.h"
006ea73e 55#include "iostat.h"
1da177e4
LT		 56
57#define NFSDBG_FACILITY NFSDBG_PROC
58
2066fe89 59#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 60#define NFS4_POLL_RETRY_MAX (15*HZ)
61
cdd4e68b 62struct nfs4_opendata;
864472e9 63static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 64static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
faf5f49c 65static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
faf5f49c 66static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
adfa6f98 67static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
9936781d
TM		 68static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 70
1da177e4
LT		 71/* Prevent leaks of NFSv4 errors into userland */
72int nfs4_map_errors(int err)
73{
74 if (err < -1000) {
75 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 76 __func__, -err);
1da177e4
LT		 77 return -EIO;
78 }
79 return err;
80}
81
82/*
83 * This is our standard bitmap for GETATTR requests.
84 */
85const u32 nfs4_fattr_bitmap[2] = {
86 FATTR4_WORD0_TYPE
87 | FATTR4_WORD0_CHANGE
88 | FATTR4_WORD0_SIZE
89 | FATTR4_WORD0_FSID
90 | FATTR4_WORD0_FILEID,
91 FATTR4_WORD1_MODE
92 | FATTR4_WORD1_NUMLINKS
93 | FATTR4_WORD1_OWNER
94 | FATTR4_WORD1_OWNER_GROUP
95 | FATTR4_WORD1_RAWDEV
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
100};
101
102const u32 nfs4_statfs_bitmap[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
109};
110
4ce79717 111const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 112 FATTR4_WORD0_MAXLINK
113 | FATTR4_WORD0_MAXNAME,
114 0
115};
116
117const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME,
121 0
122};
123
830b8e33
MN		 124const u32 nfs4_fs_locations_bitmap[2] = {
125 FATTR4_WORD0_TYPE
126 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_SIZE
128 | FATTR4_WORD0_FSID
129 | FATTR4_WORD0_FILEID
130 | FATTR4_WORD0_FS_LOCATIONS,
131 FATTR4_WORD1_MODE
132 | FATTR4_WORD1_NUMLINKS
133 | FATTR4_WORD1_OWNER
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140 | FATTR4_WORD1_MOUNTED_ON_FILEID
141};
142
bc4785cd 143static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 144 struct nfs4_readdir_arg *readdir)
145{
0dbb4c67 146 __be32 *start, *p;
1da177e4
LT		 147
148 BUG_ON(readdir->count < 80);
149 if (cookie > 2) {
b7ef1956 150 readdir->cookie = cookie;
1da177e4
LT		 151 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
152 return;
153 }
154
155 readdir->cookie = 0;
156 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
157 if (cookie == 2)
158 return;
159
160 /*
161 * NFSv4 servers do not return entries for '.' and '..'
162 * Therefore, we fake these entries here. We let '.'
163 * have cookie 0 and '..' have cookie 1. Note that
164 * when talking to the server, we always send cookie 0
165 * instead of 1 or 2.
166 */
0dbb4c67 167 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 168
169 if (cookie == 0) {
170 *p++ = xdr_one; /* next */
171 *p++ = xdr_zero; /* cookie, first word */
172 *p++ = xdr_one; /* cookie, second word */
173 *p++ = xdr_one; /* entry len */
174 memcpy(p, ".\0\0\0", 4); /* entry */
175 p++;
176 *p++ = xdr_one; /* bitmap length */
177 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
178 *p++ = htonl(8); /* attribute buffer length */
4e769b93 179 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 180 }
181
182 *p++ = xdr_one; /* next */
183 *p++ = xdr_zero; /* cookie, first word */
184 *p++ = xdr_two; /* cookie, second word */
185 *p++ = xdr_two; /* entry len */
186 memcpy(p, "..\0\0", 4); /* entry */
187 p++;
188 *p++ = xdr_one; /* bitmap length */
189 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
190 *p++ = htonl(8); /* attribute buffer length */
4e769b93 191 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 192
193 readdir->pgbase = (char *)p - (char *)start;
194 readdir->count -= readdir->pgbase;
195 kunmap_atomic(start, KM_USER0);
196}
197
26e976a8 198static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 199{
7539bbab 200 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 201 spin_lock(&clp->cl_lock);
202 if (time_before(clp->cl_last_renewal,timestamp))
203 clp->cl_last_renewal = timestamp;
204 spin_unlock(&clp->cl_lock);
205}
206
38478b24 207static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 208{
38478b24 209 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 210
38478b24 211 spin_lock(&dir->i_lock);
40d24704
TM		 212 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
213 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 214 nfs_force_lookup_revalidate(dir);
40d24704 215 nfsi->change_attr = cinfo->after;
38478b24 216 spin_unlock(&dir->i_lock);
1da177e4
LT		 217}
218
e56e0b78 219struct nfs4_opendata {
c6d00e63 220 struct kref kref;
e56e0b78
TM		 221 struct nfs_openargs o_arg;
222 struct nfs_openres o_res;
cdd4e68b
TM		 223 struct nfs_open_confirmargs c_arg;
224 struct nfs_open_confirmres c_res;
e56e0b78
TM		 225 struct nfs_fattr f_attr;
226 struct nfs_fattr dir_attr;
ad389da7 227 struct path path;
e56e0b78
TM		 228 struct dentry *dir;
229 struct nfs4_state_owner *owner;
aac00a8d 230 struct nfs4_state *state;
e56e0b78 231 struct iattr attrs;
26e976a8 232 unsigned long timestamp;
3e309914 233 unsigned int rpc_done : 1;
24ac23ab
TM		 234 int rpc_status;
235 int cancelled;
e56e0b78
TM		 236};
237
2ced46c2
TM		 238
239static void nfs4_init_opendata_res(struct nfs4_opendata *p)
240{
241 p->o_res.f_attr = &p->f_attr;
242 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 243 p->o_res.seqid = p->o_arg.seqid;
244 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 245 p->o_res.server = p->o_arg.server;
246 nfs_fattr_init(&p->f_attr);
247 nfs_fattr_init(&p->dir_attr);
248}
249
ad389da7 250static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
e56e0b78
TM		 251 struct nfs4_state_owner *sp, int flags,
252 const struct iattr *attrs)
253{
ad389da7 254 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 255 struct inode *dir = parent->d_inode;
256 struct nfs_server *server = NFS_SERVER(dir);
257 struct nfs4_opendata *p;
258
259 p = kzalloc(sizeof(*p), GFP_KERNEL);
260 if (p == NULL)
261 goto err;
262 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
263 if (p->o_arg.seqid == NULL)
264 goto err_free;
ad389da7
TM		 265 p->path.mnt = mntget(path->mnt);
266 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 267 p->dir = parent;
268 p->owner = sp;
269 atomic_inc(&sp->so_count);
270 p->o_arg.fh = NFS_FH(dir);
271 p->o_arg.open_flags = flags,
7539bbab 272 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 273 p->o_arg.id = sp->so_owner_id.id;
ad389da7 274 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 275 p->o_arg.server = server;
276 p->o_arg.bitmask = server->attr_bitmask;
277 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 278 if (flags & O_EXCL) {
279 u32 *s = (u32 *) p->o_arg.u.verifier.data;
280 s[0] = jiffies;
281 s[1] = current->pid;
282 } else if (flags & O_CREAT) {
283 p->o_arg.u.attrs = &p->attrs;
284 memcpy(&p->attrs, attrs, sizeof(p->attrs));
285 }
cdd4e68b
TM		 286 p->c_arg.fh = &p->o_res.fh;
287 p->c_arg.stateid = &p->o_res.stateid;
288 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 289 nfs4_init_opendata_res(p);
c6d00e63 290 kref_init(&p->kref);
e56e0b78
TM		 291 return p;
292err_free:
293 kfree(p);
294err:
295 dput(parent);
296 return NULL;
297}
298
c6d00e63 299static void nfs4_opendata_free(struct kref *kref)
e56e0b78 300{
c6d00e63
TM		 301 struct nfs4_opendata *p = container_of(kref,
302 struct nfs4_opendata, kref);
303
304 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 305 if (p->state != NULL)
306 nfs4_put_open_state(p->state);
c6d00e63
TM		 307 nfs4_put_state_owner(p->owner);
308 dput(p->dir);
31f31db1 309 path_put(&p->path);
c6d00e63
TM		 310 kfree(p);
311}
312
313static void nfs4_opendata_put(struct nfs4_opendata *p)
314{
315 if (p != NULL)
316 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 317}
318
06f814a3
TM		 319static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
320{
06f814a3
TM		 321 int ret;
322
06f814a3 323 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 324 return ret;
325}
326
6ee41268
TM		 327static int can_open_cached(struct nfs4_state *state, int mode)
328{
329 int ret = 0;
330 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
331 case FMODE_READ:
332 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 333 break;
334 case FMODE_WRITE:
335 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 336 break;
337 case FMODE_READ|FMODE_WRITE:
338 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
339 }
340 return ret;
341}
342
aac00a8d
TM		 343static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
344{
345 if ((delegation->type & open_flags) != open_flags)
346 return 0;
15c831bf 347 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d
TM		 348 return 0;
349 return 1;
350}
351
003707c7 352static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
e7616923
TM		 353{
354 switch (open_flags) {
355 case FMODE_WRITE:
356 state->n_wronly++;
357 break;
358 case FMODE_READ:
359 state->n_rdonly++;
360 break;
361 case FMODE_READ|FMODE_WRITE:
362 state->n_rdwr++;
363 }
003707c7
TM		 364 nfs4_state_set_mode_locked(state, state->state | open_flags);
365}
366
367static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
368{
369 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
370 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
371 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
372 switch (open_flags) {
373 case FMODE_READ:
374 set_bit(NFS_O_RDONLY_STATE, &state->flags);
375 break;
376 case FMODE_WRITE:
377 set_bit(NFS_O_WRONLY_STATE, &state->flags);
378 break;
379 case FMODE_READ|FMODE_WRITE:
380 set_bit(NFS_O_RDWR_STATE, &state->flags);
381 }
e7616923
TM		 382}
383
003707c7
TM		 384static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
385{
8bda4e4c 386 write_seqlock(&state->seqlock);
003707c7 387 nfs_set_open_stateid_locked(state, stateid, open_flags);
8bda4e4c 388 write_sequnlock(&state->seqlock);
003707c7
TM		 389}
390
34310430 391static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, int open_flags)
1da177e4 392{
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
34310430
TM		 410static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, int open_flags)
411{
412 struct nfs_inode *nfsi = NFS_I(state->inode);
413 struct nfs_delegation *deleg_cur;
414 int ret = 0;
415
416 open_flags &= (FMODE_READ|FMODE_WRITE);
417
418 rcu_read_lock();
419 deleg_cur = rcu_dereference(nfsi->delegation);
420 if (deleg_cur == NULL)
421 goto no_delegation;
422
423 spin_lock(&deleg_cur->lock);
424 if (nfsi->delegation != deleg_cur ||
425 (deleg_cur->type & open_flags) != open_flags)
426 goto no_delegation_unlock;
427
428 if (delegation == NULL)
429 delegation = &deleg_cur->stateid;
430 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
431 goto no_delegation_unlock;
432
433 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, open_flags);
434 ret = 1;
435no_delegation_unlock:
436 spin_unlock(&deleg_cur->lock);
437no_delegation:
438 rcu_read_unlock();
439
440 if (!ret && open_stateid != NULL) {
441 __update_open_stateid(state, open_stateid, NULL, open_flags);
442 ret = 1;
443 }
444
445 return ret;
446}
447
448
aac00a8d
TM		 449static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
450{
451 struct nfs_delegation *delegation;
452
453 rcu_read_lock();
454 delegation = rcu_dereference(NFS_I(inode)->delegation);
455 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
456 rcu_read_unlock();
457 return;
458 }
459 rcu_read_unlock();
460 nfs_inode_return_delegation(inode);
461}
462
6ee41268 463static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 464{
465 struct nfs4_state *state = opendata->state;
466 struct nfs_inode *nfsi = NFS_I(state->inode);
467 struct nfs_delegation *delegation;
468 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
469 nfs4_stateid stateid;
470 int ret = -EAGAIN;
471
aac00a8d 472 for (;;) {
6ee41268
TM		 473 if (can_open_cached(state, open_mode)) {
474 spin_lock(&state->owner->so_lock);
475 if (can_open_cached(state, open_mode)) {
476 update_open_stateflags(state, open_mode);
477 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 478 goto out_return_state;
479 }
480 spin_unlock(&state->owner->so_lock);
481 }
34310430
TM		 482 rcu_read_lock();
483 delegation = rcu_dereference(nfsi->delegation);
484 if (delegation == NULL ||
485 !can_open_delegated(delegation, open_mode)) {
486 rcu_read_unlock();
aac00a8d 487 break;
34310430 488 }
aac00a8d
TM		 489 /* Save the delegation */
490 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
491 rcu_read_unlock();
af22f94a 492 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 493 if (ret != 0)
494 goto out;
495 ret = -EAGAIN;
34310430
TM		 496
497 /* Try to update the stateid using the delegation */
498 if (update_open_stateid(state, NULL, &stateid, open_mode))
499 goto out_return_state;
aac00a8d 500 }
aac00a8d
TM		 501out:
502 return ERR_PTR(ret);
503out_return_state:
504 atomic_inc(&state->count);
505 return state;
506}
507
24ac23ab
TM		 508static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
509{
510 struct inode *inode;
511 struct nfs4_state *state = NULL;
003707c7 512 struct nfs_delegation *delegation;
1b370bc2 513 int ret;
24ac23ab 514
aac00a8d 515 if (!data->rpc_done) {
6ee41268 516 state = nfs4_try_open_cached(data);
aac00a8d
TM		 517 goto out;
518 }
519
1b370bc2 520 ret = -EAGAIN;
24ac23ab 521 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 522 goto err;
24ac23ab 523 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 524 ret = PTR_ERR(inode);
03f28e3a 525 if (IS_ERR(inode))
1b370bc2
TM		 526 goto err;
527 ret = -ENOMEM;
24ac23ab
TM		 528 state = nfs4_get_open_state(inode, data->owner);
529 if (state == NULL)
1b370bc2 530 goto err_put_inode;
549d6ed5 531 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 532 int delegation_flags = 0;
533
003707c7
TM		 534 rcu_read_lock();
535 delegation = rcu_dereference(NFS_I(inode)->delegation);
536 if (delegation)
537 delegation_flags = delegation->flags;
538 rcu_read_unlock();
15c831bf 539 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 540 nfs_inode_set_delegation(state->inode,
541 data->owner->so_cred,
542 &data->o_res);
543 else
544 nfs_inode_reclaim_delegation(state->inode,
545 data->owner->so_cred,
546 &data->o_res);
547 }
34310430
TM		 548
549 update_open_stateid(state, &data->o_res.stateid, NULL,
550 data->o_arg.open_flags);
24ac23ab 551 iput(inode);
aac00a8d 552out:
24ac23ab 553 return state;
1b370bc2
TM		 554err_put_inode:
555 iput(inode);
556err:
557 return ERR_PTR(ret);
24ac23ab
TM		 558}
559
864472e9
TM		 560static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
561{
562 struct nfs_inode *nfsi = NFS_I(state->inode);
563 struct nfs_open_context *ctx;
564
565 spin_lock(&state->inode->i_lock);
566 list_for_each_entry(ctx, &nfsi->open_files, list) {
567 if (ctx->state != state)
568 continue;
569 get_nfs_open_context(ctx);
570 spin_unlock(&state->inode->i_lock);
571 return ctx;
572 }
573 spin_unlock(&state->inode->i_lock);
574 return ERR_PTR(-ENOENT);
575}
576
6f220ed5
TM		 577static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
578{
579 struct nfs4_opendata *opendata;
580
581 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
582 if (opendata == NULL)
583 return ERR_PTR(-ENOMEM);
584 opendata->state = state;
585 atomic_inc(&state->count);
586 return opendata;
587}
588
2ced46c2 589static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
864472e9 590{
2ced46c2 591 struct nfs4_state *newstate;
864472e9
TM		 592 int ret;
593
594 opendata->o_arg.open_flags = openflags;
2ced46c2
TM		 595 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
596 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
597 nfs4_init_opendata_res(opendata);
864472e9
TM		 598 ret = _nfs4_proc_open(opendata);
599 if (ret != 0)
600 return ret;
2ced46c2 601 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 602 if (IS_ERR(newstate))
603 return PTR_ERR(newstate);
604 nfs4_close_state(&opendata->path, newstate, openflags);
2ced46c2 605 *res = newstate;
864472e9
TM		 606 return 0;
607}
608
609static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
610{
864472e9 611 struct nfs4_state *newstate;
864472e9
TM		 612 int ret;
613
614 /* memory barrier prior to reading state->n_* */
2ced46c2 615 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 616 smp_rmb();
617 if (state->n_rdwr != 0) {
2ced46c2 618 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 619 if (ret != 0)
620 return ret;
2ced46c2
TM		 621 if (newstate != state)
622 return -ESTALE;
864472e9
TM		 623 }
624 if (state->n_wronly != 0) {
2ced46c2 625 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 626 if (ret != 0)
627 return ret;
2ced46c2
TM		 628 if (newstate != state)
629 return -ESTALE;
864472e9
TM		 630 }
631 if (state->n_rdonly != 0) {
2ced46c2 632 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 633 if (ret != 0)
634 return ret;
2ced46c2
TM		 635 if (newstate != state)
636 return -ESTALE;
864472e9 637 }
1ac7e2fd
TM		 638 /*
639 * We may have performed cached opens for all three recoveries.
640 * Check if we need to update the current stateid.
641 */
642 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
643 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 644 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 645 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
646 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 647 write_sequnlock(&state->seqlock);
1ac7e2fd 648 }
864472e9
TM		 649 return 0;
650}
651
1da177e4
LT		 652/*
653 * OPEN_RECLAIM:
654 * reclaim state on the server after a reboot.
1da177e4 655 */
539cd03a 656static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 657{
1ac7e2fd 658 struct nfs_delegation *delegation;
864472e9
TM		 659 struct nfs4_opendata *opendata;
660 int delegation_type = 0;
1da177e4
LT		 661 int status;
662
6f220ed5
TM		 663 opendata = nfs4_open_recoverdata_alloc(ctx, state);
664 if (IS_ERR(opendata))
665 return PTR_ERR(opendata);
864472e9
TM		 666 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
667 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 668 rcu_read_lock();
669 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 670 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 671 delegation_type = delegation->type;
1ac7e2fd 672 rcu_read_unlock();
864472e9
TM		 673 opendata->o_arg.u.delegation_type = delegation_type;
674 status = nfs4_open_recover(opendata, state);
c6d00e63 675 nfs4_opendata_put(opendata);
1da177e4
LT		 676 return status;
677}
678
539cd03a 679static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 680{
681 struct nfs_server *server = NFS_SERVER(state->inode);
682 struct nfs4_exception exception = { };
683 int err;
684 do {
539cd03a 685 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 686 if (err != -NFS4ERR_DELAY)
687 break;
688 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 689 } while (exception.retry);
690 return err;
691}
692
864472e9
TM		 693static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
694{
695 struct nfs_open_context *ctx;
696 int ret;
697
698 ctx = nfs4_state_find_open_context(state);
699 if (IS_ERR(ctx))
700 return PTR_ERR(ctx);
539cd03a 701 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 702 put_nfs_open_context(ctx);
703 return ret;
704}
705
13437e12 706static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 707{
e56e0b78 708 struct nfs4_opendata *opendata;
864472e9 709 int ret;
1da177e4 710
6f220ed5
TM		 711 opendata = nfs4_open_recoverdata_alloc(ctx, state);
712 if (IS_ERR(opendata))
713 return PTR_ERR(opendata);
e56e0b78 714 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 715 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 716 sizeof(opendata->o_arg.u.delegation.data));
864472e9 717 ret = nfs4_open_recover(opendata, state);
c6d00e63 718 nfs4_opendata_put(opendata);
864472e9 719 return ret;
1da177e4
LT		 720}
721
13437e12 722int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 723{
724 struct nfs4_exception exception = { };
539cd03a 725 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 726 int err;
727 do {
13437e12 728 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 729 switch (err) {
730 case 0:
731 return err;
732 case -NFS4ERR_STALE_CLIENTID:
733 case -NFS4ERR_STALE_STATEID:
734 case -NFS4ERR_EXPIRED:
735 /* Don't recall a delegation if it was lost */
7539bbab 736 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 737 return err;
738 }
739 err = nfs4_handle_exception(server, err, &exception);
740 } while (exception.retry);
741 return err;
742}
743
cdd4e68b
TM		 744static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
745{
746 struct nfs4_opendata *data = calldata;
747
748 data->rpc_status = task->tk_status;
749 if (RPC_ASSASSINATED(task))
750 return;
26e976a8 751 if (data->rpc_status == 0) {
cdd4e68b
TM		 752 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
753 sizeof(data->o_res.stateid.data));
bb22629e 754 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 755 renew_lease(data->o_res.server, data->timestamp);
3e309914 756 data->rpc_done = 1;
26e976a8 757 }
cdd4e68b
TM		 758}
759
760static void nfs4_open_confirm_release(void *calldata)
761{
762 struct nfs4_opendata *data = calldata;
763 struct nfs4_state *state = NULL;
764
765 /* If this request hasn't been cancelled, do nothing */
766 if (data->cancelled == 0)
767 goto out_free;
768 /* In case of error, no cleanup! */
3e309914 769 if (!data->rpc_done)
cdd4e68b 770 goto out_free;
cdd4e68b 771 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 772 if (!IS_ERR(state))
4a35bd41 773 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
cdd4e68b 774out_free:
c6d00e63 775 nfs4_opendata_put(data);
cdd4e68b
TM		 776}
777
778static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 779 .rpc_call_done = nfs4_open_confirm_done,
780 .rpc_release = nfs4_open_confirm_release,
781};
782
783/*
784 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
785 */
786static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
787{
788 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
789 struct rpc_task *task;
5138fde0
TM		 790 struct rpc_message msg = {
791 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
792 .rpc_argp = &data->c_arg,
793 .rpc_resp = &data->c_res,
794 .rpc_cred = data->owner->so_cred,
795 };
c970aa85
TM		 796 struct rpc_task_setup task_setup_data = {
797 .rpc_client = server->client,
5138fde0 798 .rpc_message = &msg,
c970aa85
TM		 799 .callback_ops = &nfs4_open_confirm_ops,
800 .callback_data = data,
101070ca 801 .workqueue = nfsiod_workqueue,
c970aa85
TM		 802 .flags = RPC_TASK_ASYNC,
803 };
1da177e4
LT		 804 int status;
805
c6d00e63 806 kref_get(&data->kref);
3e309914
TM		 807 data->rpc_done = 0;
808 data->rpc_status = 0;
5138fde0 809 data->timestamp = jiffies;
c970aa85 810 task = rpc_run_task(&task_setup_data);
7a1218a2 811 if (IS_ERR(task))
cdd4e68b 812 return PTR_ERR(task);
cdd4e68b
TM		 813 status = nfs4_wait_for_completion_rpc_task(task);
814 if (status != 0) {
815 data->cancelled = 1;
816 smp_wmb();
817 } else
818 status = data->rpc_status;
e6b3c4db 819 rpc_put_task(task);
1da177e4
LT		 820 return status;
821}
822
24ac23ab 823static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 824{
24ac23ab
TM		 825 struct nfs4_opendata *data = calldata;
826 struct nfs4_state_owner *sp = data->owner;
5138fde0 827
24ac23ab
TM		 828 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
829 return;
aac00a8d
TM		 830 /*
831 * Check if we still need to send an OPEN call, or if we can use
832 * a delegation instead.
833 */
834 if (data->state != NULL) {
835 struct nfs_delegation *delegation;
836
6ee41268
TM		 837 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
838 goto out_no_action;
aac00a8d
TM		 839 rcu_read_lock();
840 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
841 if (delegation != NULL &&
15c831bf 842 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 843 rcu_read_unlock();
6ee41268 844 goto out_no_action;
aac00a8d
TM		 845 }
846 rcu_read_unlock();
847 }
24ac23ab 848 /* Update sequence id. */
9f958ab8 849 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 850 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 851 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 852 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 853 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
854 }
26e976a8 855 data->timestamp = jiffies;
5138fde0 856 rpc_call_start(task);
6ee41268
TM		 857 return;
858out_no_action:
859 task->tk_action = NULL;
860
24ac23ab 861}
1da177e4 862
24ac23ab
TM		 863static void nfs4_open_done(struct rpc_task *task, void *calldata)
864{
865 struct nfs4_opendata *data = calldata;
1da177e4 866
24ac23ab
TM		 867 data->rpc_status = task->tk_status;
868 if (RPC_ASSASSINATED(task))
869 return;
870 if (task->tk_status == 0) {
871 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 872 case S_IFREG:
873 break;
874 case S_IFLNK:
24ac23ab 875 data->rpc_status = -ELOOP;
6f926b5b
TM		 876 break;
877 case S_IFDIR:
24ac23ab 878 data->rpc_status = -EISDIR;
6f926b5b
TM		 879 break;
880 default:
24ac23ab 881 data->rpc_status = -ENOTDIR;
6f926b5b 882 }
26e976a8 883 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 884 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
885 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 886 }
3e309914 887 data->rpc_done = 1;
24ac23ab 888}
6f926b5b 889
24ac23ab
TM		 890static void nfs4_open_release(void *calldata)
891{
892 struct nfs4_opendata *data = calldata;
893 struct nfs4_state *state = NULL;
894
895 /* If this request hasn't been cancelled, do nothing */
896 if (data->cancelled == 0)
897 goto out_free;
898 /* In case of error, no cleanup! */
3e309914 899 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 900 goto out_free;
901 /* In case we need an open_confirm, no cleanup! */
902 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
903 goto out_free;
24ac23ab 904 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 905 if (!IS_ERR(state))
4a35bd41 906 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
24ac23ab 907out_free:
c6d00e63 908 nfs4_opendata_put(data);
24ac23ab
TM		 909}
910
911static const struct rpc_call_ops nfs4_open_ops = {
912 .rpc_call_prepare = nfs4_open_prepare,
913 .rpc_call_done = nfs4_open_done,
914 .rpc_release = nfs4_open_release,
915};
916
917/*
918 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
919 */
920static int _nfs4_proc_open(struct nfs4_opendata *data)
921{
922 struct inode *dir = data->dir->d_inode;
923 struct nfs_server *server = NFS_SERVER(dir);
924 struct nfs_openargs *o_arg = &data->o_arg;
925 struct nfs_openres *o_res = &data->o_res;
926 struct rpc_task *task;
5138fde0
TM		 927 struct rpc_message msg = {
928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
929 .rpc_argp = o_arg,
930 .rpc_resp = o_res,
931 .rpc_cred = data->owner->so_cred,
932 };
c970aa85
TM		 933 struct rpc_task_setup task_setup_data = {
934 .rpc_client = server->client,
5138fde0 935 .rpc_message = &msg,
c970aa85
TM		 936 .callback_ops = &nfs4_open_ops,
937 .callback_data = data,
101070ca 938 .workqueue = nfsiod_workqueue,
c970aa85
TM		 939 .flags = RPC_TASK_ASYNC,
940 };
24ac23ab
TM		 941 int status;
942
c6d00e63 943 kref_get(&data->kref);
3e309914
TM		 944 data->rpc_done = 0;
945 data->rpc_status = 0;
2ced46c2 946 data->cancelled = 0;
c970aa85 947 task = rpc_run_task(&task_setup_data);
7a1218a2 948 if (IS_ERR(task))
24ac23ab 949 return PTR_ERR(task);
24ac23ab
TM		 950 status = nfs4_wait_for_completion_rpc_task(task);
951 if (status != 0) {
952 data->cancelled = 1;
953 smp_wmb();
954 } else
955 status = data->rpc_status;
e6b3c4db 956 rpc_put_task(task);
3e309914 957 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 958 return status;
959
9936781d
TM		 960 if (o_res->fh.size == 0)
961 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
962
56ae19f3
TM		 963 if (o_arg->open_flags & O_CREAT) {
964 update_changeattr(dir, &o_res->cinfo);
965 nfs_post_op_update_inode(dir, o_res->dir_attr);
966 } else
967 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 968 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 969 status = _nfs4_proc_open_confirm(data);
1da177e4 970 if (status != 0)
24ac23ab 971 return status;
1da177e4
LT		 972 }
973 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 974 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 975 return 0;
1da177e4
LT		 976}
977
10afec90 978static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 979{
7539bbab 980 struct nfs_client *clp = server->nfs_client;
6b30954e 981 int ret;
58d9714a 982
6b30954e
TM		 983 for (;;) {
984 ret = nfs4_wait_clnt_recover(server->client, clp);
985 if (ret != 0)
986 return ret;
e598d843
TM		 987 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
988 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 989 break;
58d9714a 990 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 991 }
992 return 0;
58d9714a
TM		 993}
994
1da177e4
LT		 995/*
996 * OPEN_EXPIRED:
997 * reclaim state on the server after a network partition.
998 * Assumes caller holds the appropriate lock
999 */
539cd03a 1000static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1001{
e56e0b78 1002 struct nfs4_opendata *opendata;
864472e9 1003 int ret;
1da177e4 1004
6f220ed5
TM		 1005 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1006 if (IS_ERR(opendata))
1007 return PTR_ERR(opendata);
864472e9 1008 ret = nfs4_open_recover(opendata, state);
35d05778 1009 if (ret == -ESTALE)
539cd03a 1010 d_drop(ctx->path.dentry);
c6d00e63 1011 nfs4_opendata_put(opendata);
864472e9 1012 return ret;
1da177e4
LT		 1013}
1014
539cd03a 1015static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1016{
539cd03a 1017 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1018 struct nfs4_exception exception = { };
1019 int err;
1020
1021 do {
539cd03a 1022 err = _nfs4_open_expired(ctx, state);
202b50dc
TM		 1023 if (err == -NFS4ERR_DELAY)
1024 nfs4_handle_exception(server, err, &exception);
1025 } while (exception.retry);
1026 return err;
1027}
1028
1da177e4
LT		 1029static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1030{
1da177e4 1031 struct nfs_open_context *ctx;
864472e9 1032 int ret;
1da177e4 1033
864472e9
TM		 1034 ctx = nfs4_state_find_open_context(state);
1035 if (IS_ERR(ctx))
1036 return PTR_ERR(ctx);
539cd03a 1037 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1038 put_nfs_open_context(ctx);
1039 return ret;
1da177e4
LT		 1040}
1041
aa53ed54
JL		 1042/*
1043 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1044 * fields corresponding to attributes that were used to store the verifier.
1045 * Make sure we clobber those fields in the later setattr call
1046 */
1047static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1048{
1049 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1050 !(sattr->ia_valid & ATTR_ATIME_SET))
1051 sattr->ia_valid |= ATTR_ATIME;
1052
1053 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1054 !(sattr->ia_valid & ATTR_MTIME_SET))
1055 sattr->ia_valid |= ATTR_MTIME;
1056}
1057
1da177e4 1058/*
24ac23ab 1059 * Returns a referenced nfs4_state
1da177e4 1060 */
ad389da7 1061static 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		 1062{
1063 struct nfs4_state_owner *sp;
1064 struct nfs4_state *state = NULL;
1065 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 1066 struct nfs_client *clp = server->nfs_client;
e56e0b78 1067 struct nfs4_opendata *opendata;
aac00a8d 1068 int status;
1da177e4
LT		 1069
1070 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1071 status = -ENOMEM;
1072 if (!(sp = nfs4_get_state_owner(server, cred))) {
1073 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1074 goto out_err;
1075 }
58d9714a
TM		 1076 status = nfs4_recover_expired_lease(server);
1077 if (status != 0)
b4454fe1 1078 goto err_put_state_owner;
aac00a8d
TM		 1079 if (path->dentry->d_inode != NULL)
1080 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
58d9714a
TM		 1081 down_read(&clp->cl_sem);
1082 status = -ENOMEM;
ad389da7 1083 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
e56e0b78 1084 if (opendata == NULL)
76723de0 1085 goto err_release_rwsem;
1da177e4 1086
aac00a8d
TM		 1087 if (path->dentry->d_inode != NULL)
1088 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1089
24ac23ab 1090 status = _nfs4_proc_open(opendata);
1da177e4 1091 if (status != 0)
c6d00e63 1092 goto err_opendata_put;
1da177e4 1093
aa53ed54
JL		 1094 if (opendata->o_arg.open_flags & O_EXCL)
1095 nfs4_exclusive_attrset(opendata, sattr);
1096
24ac23ab 1097 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1098 status = PTR_ERR(state);
1099 if (IS_ERR(state))
c6d00e63 1100 goto err_opendata_put;
c6d00e63 1101 nfs4_opendata_put(opendata);
1da177e4
LT		 1102 nfs4_put_state_owner(sp);
1103 up_read(&clp->cl_sem);
1104 *res = state;
1105 return 0;
c6d00e63
TM		 1106err_opendata_put:
1107 nfs4_opendata_put(opendata);
76723de0
TM		 1108err_release_rwsem:
1109 up_read(&clp->cl_sem);
e56e0b78
TM		 1110err_put_state_owner:
1111 nfs4_put_state_owner(sp);
1da177e4 1112out_err:
1da177e4
LT		 1113 *res = NULL;
1114 return status;
1115}
1116
1117
ad389da7 1118static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1119{
1120 struct nfs4_exception exception = { };
1121 struct nfs4_state *res;
1122 int status;
1123
1124 do {
ad389da7 1125 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1da177e4
LT		 1126 if (status == 0)
1127 break;
1128 /* NOTE: BAD_SEQID means the server and client disagree about the
1129 * book-keeping w.r.t. state-changing operations
1130 * (OPEN/CLOSE/LOCK/LOCKU...)
1131 * It is actually a sign of a bug on the client or on the server.
1132 *
1133 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1134 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1135 * have unhashed the old state_owner for us, and that we can
1136 * therefore safely retry using a new one. We should still warn
1137 * the user though...
1138 */
1139 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1140 printk(KERN_WARNING "NFS: v4 server %s "
1141 " returned a bad sequence-id error!\n",
1142 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1143 exception.retry = 1;
1144 continue;
1145 }
550f5747
TM		 1146 /*
1147 * BAD_STATEID on OPEN means that the server cancelled our
1148 * state before it received the OPEN_CONFIRM.
1149 * Recover by retrying the request as per the discussion
1150 * on Page 181 of RFC3530.
1151 */
1152 if (status == -NFS4ERR_BAD_STATEID) {
1153 exception.retry = 1;
1154 continue;
1155 }
aac00a8d
TM		 1156 if (status == -EAGAIN) {
1157 /* We must have found a delegation */
1158 exception.retry = 1;
1159 continue;
1160 }
1da177e4
LT		 1161 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1162 status, &exception));
1163 } while (exception.retry);
1164 return res;
1165}
1166
659bfcd6
TM		 1167static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1168 struct nfs_fattr *fattr, struct iattr *sattr,
1169 struct nfs4_state *state)
1da177e4 1170{
3e4f6290 1171 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1172 struct nfs_setattrargs arg = {
3e4f6290 1173 .fh = NFS_FH(inode),
1da177e4
LT		 1174 .iap = sattr,
1175 .server = server,
1176 .bitmask = server->attr_bitmask,
1177 };
1178 struct nfs_setattrres res = {
1179 .fattr = fattr,
1180 .server = server,
1181 };
1182 struct rpc_message msg = {
659bfcd6
TM		 1183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1184 .rpc_argp = &arg,
1185 .rpc_resp = &res,
1186 .rpc_cred = cred,
1da177e4 1187 };
26e976a8 1188 unsigned long timestamp = jiffies;
65e4308d 1189 int status;
1da177e4 1190
0e574af1 1191 nfs_fattr_init(fattr);
1da177e4 1192
3e4f6290
TM		 1193 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1194 /* Use that stateid */
1195 } else if (state != NULL) {
08e9eac4
TM		 1196 nfs4_copy_stateid(&arg.stateid, state, current->files);
1197 } else
1da177e4
LT		 1198 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1199
65e4308d 1200 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1201 if (status == 0 && state != NULL)
1202 renew_lease(server, timestamp);
65e4308d 1203 return status;
1da177e4
LT		 1204}
1205
659bfcd6
TM		 1206static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1207 struct nfs_fattr *fattr, struct iattr *sattr,
1208 struct nfs4_state *state)
1da177e4 1209{
3e4f6290 1210 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1211 struct nfs4_exception exception = { };
1212 int err;
1213 do {
1214 err = nfs4_handle_exception(server,
659bfcd6 1215 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1216 &exception);
1217 } while (exception.retry);
1218 return err;
1219}
1220
1221struct nfs4_closedata {
4a35bd41 1222 struct path path;
1da177e4
LT		 1223 struct inode *inode;
1224 struct nfs4_state *state;
1225 struct nfs_closeargs arg;
1226 struct nfs_closeres res;
516a6af6 1227 struct nfs_fattr fattr;
26e976a8 1228 unsigned long timestamp;
1da177e4
LT		 1229};
1230
963d8fe5 1231static void nfs4_free_closedata(void *data)
9512135d 1232{
963d8fe5
TM		 1233 struct nfs4_closedata *calldata = data;
1234 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1235
1236 nfs4_put_open_state(calldata->state);
1237 nfs_free_seqid(calldata->arg.seqid);
9512135d 1238 nfs4_put_state_owner(sp);
31f31db1 1239 path_put(&calldata->path);
9512135d
TM		 1240 kfree(calldata);
1241}
1242
963d8fe5 1243static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1244{
963d8fe5 1245 struct nfs4_closedata *calldata = data;
1da177e4 1246 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1247 struct nfs_server *server = NFS_SERVER(calldata->inode);
1248
4ce70ada
TM		 1249 if (RPC_ASSASSINATED(task))
1250 return;
1da177e4
LT		 1251 /* hmm. we are done with the inode, and in the process of freeing
1252 * the state_owner. we keep this around to process errors
1253 */
1da177e4
LT		 1254 switch (task->tk_status) {
1255 case 0:
45328c35 1256 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1257 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1258 break;
1259 case -NFS4ERR_STALE_STATEID:
1260 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1261 break;
1262 default:
1263 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1264 rpc_restart_call(task);
1265 return;
1266 }
1267 }
516a6af6 1268 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1269}
1270
4ce70ada 1271static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1272{
4ce70ada 1273 struct nfs4_closedata *calldata = data;
9512135d 1274 struct nfs4_state *state = calldata->state;
003707c7 1275 int clear_rd, clear_wr, clear_rdwr;
9512135d 1276
963d8fe5 1277 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1278 return;
003707c7 1279
003707c7 1280 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1281 spin_lock(&state->owner->so_lock);
003707c7 1282 /* Calculate the change in open mode */
e7616923 1283 if (state->n_rdwr == 0) {
003707c7 1284 if (state->n_rdonly == 0) {
003707c7
TM		 1285 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1286 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1287 }
1288 if (state->n_wronly == 0) {
003707c7
TM		 1289 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1290 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1291 }
e7616923 1292 }
4cecb76f 1293 spin_unlock(&state->owner->so_lock);
003707c7 1294 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1295 /* Note: exit _without_ calling nfs4_close_done */
1296 task->tk_action = NULL;
9512135d
TM		 1297 return;
1298 }
516a6af6 1299 nfs_fattr_init(calldata->res.fattr);
45328c35 1300 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1301 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1302 calldata->arg.open_flags = FMODE_READ;
1303 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1304 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1305 calldata->arg.open_flags = FMODE_WRITE;
1306 }
26e976a8 1307 calldata->timestamp = jiffies;
5138fde0 1308 rpc_call_start(task);
1da177e4
LT		 1309}
1310
963d8fe5 1311static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1312 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1313 .rpc_call_done = nfs4_close_done,
1314 .rpc_release = nfs4_free_closedata,
1315};
1316
1da177e4
LT		 1317/*
1318 * It is possible for data to be read/written from a mem-mapped file
1319 * after the sys_close call (which hits the vfs layer as a flush).
1320 * This means that we can't safely call nfsv4 close on a file until
1321 * the inode is cleared. This in turn means that we are not good
1322 * NFSv4 citizens - we do not indicate to the server to update the file's
1323 * share state even when we are done with one of the three share
1324 * stateid's in the inode.
1325 *
1326 * NOTE: Caller must be holding the sp->so_owner semaphore!
1327 */
a49c3c77 1328int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1329{
4a35bd41 1330 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1331 struct nfs4_closedata *calldata;
b39e625b
TM		 1332 struct nfs4_state_owner *sp = state->owner;
1333 struct rpc_task *task;
5138fde0
TM		 1334 struct rpc_message msg = {
1335 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1336 .rpc_cred = state->owner->so_cred,
1337 };
c970aa85
TM		 1338 struct rpc_task_setup task_setup_data = {
1339 .rpc_client = server->client,
5138fde0 1340 .rpc_message = &msg,
c970aa85 1341 .callback_ops = &nfs4_close_ops,
101070ca 1342 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1343 .flags = RPC_TASK_ASYNC,
1344 };
9512135d 1345 int status = -ENOMEM;
1da177e4 1346
9512135d 1347 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1348 if (calldata == NULL)
9512135d 1349 goto out;
4a35bd41 1350 calldata->inode = state->inode;
1da177e4 1351 calldata->state = state;
4a35bd41 1352 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1353 calldata->arg.stateid = &state->open_stateid;
1da177e4 1354 /* Serialization for the sequence id */
cee54fc9 1355 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1356 if (calldata->arg.seqid == NULL)
1357 goto out_free_calldata;
516a6af6
TM		 1358 calldata->arg.bitmask = server->attr_bitmask;
1359 calldata->res.fattr = &calldata->fattr;
c1d51931 1360 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1361 calldata->res.server = server;
4a35bd41
TM		 1362 calldata->path.mnt = mntget(path->mnt);
1363 calldata->path.dentry = dget(path->dentry);
9512135d 1364
5138fde0
TM		 1365 msg.rpc_argp = &calldata->arg,
1366 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1367 task_setup_data.callback_data = calldata;
1368 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1369 if (IS_ERR(task))
1370 return PTR_ERR(task);
a49c3c77
TM		 1371 status = 0;
1372 if (wait)
1373 status = rpc_wait_for_completion_task(task);
b39e625b 1374 rpc_put_task(task);
a49c3c77 1375 return status;
9512135d
TM		 1376out_free_calldata:
1377 kfree(calldata);
1378out:
b39e625b
TM		 1379 nfs4_put_open_state(state);
1380 nfs4_put_state_owner(sp);
9512135d 1381 return status;
1da177e4
LT		 1382}
1383
4a35bd41 1384static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM		 1385{
1386 struct file *filp;
1b45c46c 1387 int ret;
02a913a7 1388
1b45c46c
TM		 1389 /* If the open_intent is for execute, we have an extra check to make */
1390 if (nd->intent.open.flags & FMODE_EXEC) {
af22f94a 1391 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1392 state->owner->so_cred,
1393 nd->intent.open.flags);
1394 if (ret < 0)
1395 goto out_close;
1396 }
4a35bd41 1397 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1398 if (!IS_ERR(filp)) {
1399 struct nfs_open_context *ctx;
cd3758e3 1400 ctx = nfs_file_open_context(filp);
02a913a7 1401 ctx->state = state;
95cf959b
TM		 1402 return 0;
1403 }
1b45c46c
TM		 1404 ret = PTR_ERR(filp);
1405out_close:
a49c3c77 1406 nfs4_close_sync(path, state, nd->intent.open.flags);
1b45c46c 1407 return ret;
02a913a7
TM		 1408}
1409
1410struct dentry *
1da177e4
LT		 1411nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1412{
ad389da7 1413 struct path path = {
4ac91378 1414 .mnt = nd->path.mnt,
ad389da7
TM		 1415 .dentry = dentry,
1416 };
4ac91378 1417 struct dentry *parent;
1da177e4
LT		 1418 struct iattr attr;
1419 struct rpc_cred *cred;
1420 struct nfs4_state *state;
02a913a7 1421 struct dentry *res;
1da177e4
LT		 1422
1423 if (nd->flags & LOOKUP_CREATE) {
1424 attr.ia_mode = nd->intent.open.create_mode;
1425 attr.ia_valid = ATTR_MODE;
1426 if (!IS_POSIXACL(dir))
1427 attr.ia_mode &= ~current->fs->umask;
1428 } else {
1429 attr.ia_valid = 0;
1430 BUG_ON(nd->intent.open.flags & O_CREAT);
1431 }
1432
98a8e323 1433 cred = rpc_lookup_cred();
1da177e4 1434 if (IS_ERR(cred))
02a913a7 1435 return (struct dentry *)cred;
565277f6
TM		 1436 parent = dentry->d_parent;
1437 /* Protect against concurrent sillydeletes */
1438 nfs_block_sillyrename(parent);
ad389da7 1439 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1440 put_rpccred(cred);
02a913a7 1441 if (IS_ERR(state)) {
d75340cc 1442 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1443 d_add(dentry, NULL);
d75340cc
TM		 1444 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1445 }
565277f6 1446 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1447 return (struct dentry *)state;
1448 }
24ac23ab 1449 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1450 if (res != NULL)
deee9369 1451 path.dentry = res;
d75340cc 1452 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1453 nfs_unblock_sillyrename(parent);
4a35bd41 1454 nfs4_intent_set_file(nd, &path, state);
02a913a7 1455 return res;
1da177e4
LT		 1456}
1457
1458int
02a913a7 1459nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1460{
ad389da7 1461 struct path path = {
4ac91378 1462 .mnt = nd->path.mnt,
ad389da7
TM		 1463 .dentry = dentry,
1464 };
1da177e4
LT		 1465 struct rpc_cred *cred;
1466 struct nfs4_state *state;
1da177e4 1467
98a8e323 1468 cred = rpc_lookup_cred();
1da177e4
LT		 1469 if (IS_ERR(cred))
1470 return PTR_ERR(cred);
aac00a8d 1471 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1472 put_rpccred(cred);
02a913a7
TM		 1473 if (IS_ERR(state)) {
1474 switch (PTR_ERR(state)) {
1475 case -EPERM:
1476 case -EACCES:
1477 case -EDQUOT:
1478 case -ENOSPC:
1479 case -EROFS:
1480 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1481 return 1;
b87c0adf
CL		 1482 default:
1483 goto out_drop;
02a913a7 1484 }
02a913a7 1485 }
24ac23ab 1486 if (state->inode == dentry->d_inode) {
d75340cc 1487 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
4a35bd41 1488 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1489 return 1;
1490 }
a49c3c77 1491 nfs4_close_sync(&path, state, openflags);
02a913a7
TM		 1492out_drop:
1493 d_drop(dentry);
1da177e4
LT		 1494 return 0;
1495}
1496
1497
1498static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1499{
1500 struct nfs4_server_caps_res res = {};
1501 struct rpc_message msg = {
1502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1503 .rpc_argp = fhandle,
1504 .rpc_resp = &res,
1505 };
1506 int status;
1507
1508 status = rpc_call_sync(server->client, &msg, 0);
1509 if (status == 0) {
1510 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1511 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1512 server->caps |= NFS_CAP_ACLS;
1513 if (res.has_links != 0)
1514 server->caps |= NFS_CAP_HARDLINKS;
1515 if (res.has_symlinks != 0)
1516 server->caps |= NFS_CAP_SYMLINKS;
1517 server->acl_bitmask = res.acl_bitmask;
1518 }
1519 return status;
1520}
1521
55a97593 1522int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1523{
1524 struct nfs4_exception exception = { };
1525 int err;
1526 do {
1527 err = nfs4_handle_exception(server,
1528 _nfs4_server_capabilities(server, fhandle),
1529 &exception);
1530 } while (exception.retry);
1531 return err;
1532}
1533
1534static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1535 struct nfs_fsinfo *info)
1536{
1da177e4
LT		 1537 struct nfs4_lookup_root_arg args = {
1538 .bitmask = nfs4_fattr_bitmap,
1539 };
1540 struct nfs4_lookup_res res = {
1541 .server = server,
0e574af1 1542 .fattr = info->fattr,
1da177e4
LT		 1543 .fh = fhandle,
1544 };
1545 struct rpc_message msg = {
1546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1547 .rpc_argp = &args,
1548 .rpc_resp = &res,
1549 };
0e574af1 1550 nfs_fattr_init(info->fattr);
1da177e4
LT		 1551 return rpc_call_sync(server->client, &msg, 0);
1552}
1553
1554static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1555 struct nfs_fsinfo *info)
1556{
1557 struct nfs4_exception exception = { };
1558 int err;
1559 do {
1560 err = nfs4_handle_exception(server,
1561 _nfs4_lookup_root(server, fhandle, info),
1562 &exception);
1563 } while (exception.retry);
1564 return err;
1565}
1566
54ceac45
DH		 1567/*
1568 * get the file handle for the "/" directory on the server
1569 */
1da177e4 1570static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1571 struct nfs_fsinfo *info)
1da177e4 1572{
1da177e4
LT		 1573 int status;
1574
1da177e4 1575 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1576 if (status == 0)
1577 status = nfs4_server_capabilities(server, fhandle);
1578 if (status == 0)
1579 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1580 return nfs4_map_errors(status);
1da177e4
LT		 1581}
1582
6b97fd3d
MN		 1583/*
1584 * Get locations and (maybe) other attributes of a referral.
1585 * Note that we'll actually follow the referral later when
1586 * we detect fsid mismatch in inode revalidation
1587 */
56659e99 1588static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1589{
1590 int status = -ENOMEM;
1591 struct page *page = NULL;
1592 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1593
1594 page = alloc_page(GFP_KERNEL);
1595 if (page == NULL)
1596 goto out;
1597 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1598 if (locations == NULL)
1599 goto out;
1600
c228fd3a 1601 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1602 if (status != 0)
1603 goto out;
1604 /* Make sure server returned a different fsid for the referral */
1605 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 1606 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 1607 status = -EIO;
1608 goto out;
1609 }
1610
1611 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1612 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1613 if (!fattr->mode)
1614 fattr->mode = S_IFDIR;
1615 memset(fhandle, 0, sizeof(struct nfs_fh));
1616out:
1617 if (page)
1618 __free_page(page);
1619 if (locations)
1620 kfree(locations);
1621 return status;
1622}
1623
1da177e4
LT		 1624static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1625{
1626 struct nfs4_getattr_arg args = {
1627 .fh = fhandle,
1628 .bitmask = server->attr_bitmask,
1629 };
1630 struct nfs4_getattr_res res = {
1631 .fattr = fattr,
1632 .server = server,
1633 };
1634 struct rpc_message msg = {
1635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1636 .rpc_argp = &args,
1637 .rpc_resp = &res,
1638 };
1639
0e574af1 1640 nfs_fattr_init(fattr);
1da177e4
LT		 1641 return rpc_call_sync(server->client, &msg, 0);
1642}
1643
1644static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1645{
1646 struct nfs4_exception exception = { };
1647 int err;
1648 do {
1649 err = nfs4_handle_exception(server,
1650 _nfs4_proc_getattr(server, fhandle, fattr),
1651 &exception);
1652 } while (exception.retry);
1653 return err;
1654}
1655
1656/*
1657 * The file is not closed if it is opened due to the a request to change
1658 * the size of the file. The open call will not be needed once the
1659 * VFS layer lookup-intents are implemented.
1660 *
1661 * Close is called when the inode is destroyed.
1662 * If we haven't opened the file for O_WRONLY, we
1663 * need to in the size_change case to obtain a stateid.
1664 *
1665 * Got race?
1666 * Because OPEN is always done by name in nfsv4, it is
1667 * possible that we opened a different file by the same
1668 * name. We can recognize this race condition, but we
1669 * can't do anything about it besides returning an error.
1670 *
1671 * This will be fixed with VFS changes (lookup-intent).
1672 */
1673static int
1674nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1675 struct iattr *sattr)
1676{
08e9eac4 1677 struct inode *inode = dentry->d_inode;
659bfcd6 1678 struct rpc_cred *cred = NULL;
d530838b 1679 struct nfs4_state *state = NULL;
1da177e4
LT		 1680 int status;
1681
0e574af1 1682 nfs_fattr_init(fattr);
1da177e4 1683
d530838b 1684 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 1685 if (sattr->ia_valid & ATTR_FILE) {
1686 struct nfs_open_context *ctx;
1687
1688 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 1689 if (ctx) {
1690 cred = ctx->cred;
1691 state = ctx->state;
1692 }
659bfcd6 1693 }
08e9eac4 1694
659bfcd6 1695 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 1696 if (status == 0)
1697 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 1698 return status;
1699}
1700
56659e99
TM		 1701static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1702 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1703 struct nfs_fattr *fattr)
1704{
1705 int status;
1706 struct nfs4_lookup_arg args = {
1707 .bitmask = server->attr_bitmask,
1708 .dir_fh = dirfh,
1709 .name = name,
1710 };
1711 struct nfs4_lookup_res res = {
1712 .server = server,
1713 .fattr = fattr,
1714 .fh = fhandle,
1715 };
1716 struct rpc_message msg = {
1717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1718 .rpc_argp = &args,
1719 .rpc_resp = &res,
1720 };
1721
1722 nfs_fattr_init(fattr);
1723
1724 dprintk("NFS call lookupfh %s\n", name->name);
1725 status = rpc_call_sync(server->client, &msg, 0);
1726 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1727 return status;
1728}
1729
1730static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1731 struct qstr *name, struct nfs_fh *fhandle,
1732 struct nfs_fattr *fattr)
1733{
1734 struct nfs4_exception exception = { };
1735 int err;
1736 do {
4e56e082
TM		 1737 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1738 /* FIXME: !!!! */
1739 if (err == -NFS4ERR_MOVED) {
1740 err = -EREMOTE;
1741 break;
1742 }
1743 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1744 } while (exception.retry);
1745 return err;
1746}
1747
56659e99 1748static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1749 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1750{
4e56e082 1751 int status;
1da177e4
LT		 1752
1753 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1754 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1755 if (status == -NFS4ERR_MOVED)
1756 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1757 dprintk("NFS reply lookup: %d\n", status);
1758 return status;
1759}
1760
1761static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1762{
1763 struct nfs4_exception exception = { };
1764 int err;
1765 do {
1766 err = nfs4_handle_exception(NFS_SERVER(dir),
1767 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1768 &exception);
1769 } while (exception.retry);
1770 return err;
1771}
1772
1773static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1774{
76b32999
TM		 1775 struct nfs_server *server = NFS_SERVER(inode);
1776 struct nfs_fattr fattr;
1da177e4
LT		 1777 struct nfs4_accessargs args = {
1778 .fh = NFS_FH(inode),
76b32999
TM		 1779 .bitmask = server->attr_bitmask,
1780 };
1781 struct nfs4_accessres res = {
1782 .server = server,
1783 .fattr = &fattr,
1da177e4 1784 };
1da177e4
LT		 1785 struct rpc_message msg = {
1786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1787 .rpc_argp = &args,
1788 .rpc_resp = &res,
1789 .rpc_cred = entry->cred,
1790 };
1791 int mode = entry->mask;
1792 int status;
1793
1794 /*
1795 * Determine which access bits we want to ask for...
1796 */
1797 if (mode & MAY_READ)
1798 args.access |= NFS4_ACCESS_READ;
1799 if (S_ISDIR(inode->i_mode)) {
1800 if (mode & MAY_WRITE)
1801 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1802 if (mode & MAY_EXEC)
1803 args.access |= NFS4_ACCESS_LOOKUP;
1804 } else {
1805 if (mode & MAY_WRITE)
1806 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1807 if (mode & MAY_EXEC)
1808 args.access |= NFS4_ACCESS_EXECUTE;
1809 }
76b32999 1810 nfs_fattr_init(&fattr);
1da177e4
LT		 1811 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1812 if (!status) {
1813 entry->mask = 0;
1814 if (res.access & NFS4_ACCESS_READ)
1815 entry->mask |= MAY_READ;
1816 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1817 entry->mask |= MAY_WRITE;
1818 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1819 entry->mask |= MAY_EXEC;
76b32999 1820 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1821 }
1822 return status;
1823}
1824
1825static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1826{
1827 struct nfs4_exception exception = { };
1828 int err;
1829 do {
1830 err = nfs4_handle_exception(NFS_SERVER(inode),
1831 _nfs4_proc_access(inode, entry),
1832 &exception);
1833 } while (exception.retry);
1834 return err;
1835}
1836
1837/*
1838 * TODO: For the time being, we don't try to get any attributes
1839 * along with any of the zero-copy operations READ, READDIR,
1840 * READLINK, WRITE.
1841 *
1842 * In the case of the first three, we want to put the GETATTR
1843 * after the read-type operation -- this is because it is hard
1844 * to predict the length of a GETATTR response in v4, and thus
1845 * align the READ data correctly. This means that the GETATTR
1846 * may end up partially falling into the page cache, and we should
1847 * shift it into the 'tail' of the xdr_buf before processing.
1848 * To do this efficiently, we need to know the total length
1849 * of data received, which doesn't seem to be available outside
1850 * of the RPC layer.
1851 *
1852 * In the case of WRITE, we also want to put the GETATTR after
1853 * the operation -- in this case because we want to make sure
1854 * we get the post-operation mtime and size. This means that
1855 * we can't use xdr_encode_pages() as written: we need a variant
1856 * of it which would leave room in the 'tail' iovec.
1857 *
1858 * Both of these changes to the XDR layer would in fact be quite
1859 * minor, but I decided to leave them for a subsequent patch.
1860 */
1861static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1862 unsigned int pgbase, unsigned int pglen)
1863{
1864 struct nfs4_readlink args = {
1865 .fh = NFS_FH(inode),
1866 .pgbase = pgbase,
1867 .pglen = pglen,
1868 .pages = &page,
1869 };
1870 struct rpc_message msg = {
1871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1872 .rpc_argp = &args,
1873 .rpc_resp = NULL,
1874 };
1875
1876 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1877}
1878
1879static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1880 unsigned int pgbase, unsigned int pglen)
1881{
1882 struct nfs4_exception exception = { };
1883 int err;
1884 do {
1885 err = nfs4_handle_exception(NFS_SERVER(inode),
1886 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1887 &exception);
1888 } while (exception.retry);
1889 return err;
1890}
1891
1da177e4
LT		 1892/*
1893 * Got race?
1894 * We will need to arrange for the VFS layer to provide an atomic open.
1895 * Until then, this create/open method is prone to inefficiency and race
1896 * conditions due to the lookup, create, and open VFS calls from sys_open()
1897 * placed on the wire.
1898 *
1899 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1900 * The file will be opened again in the subsequent VFS open call
1901 * (nfs4_proc_file_open).
1902 *
1903 * The open for read will just hang around to be used by any process that
1904 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1905 */
1906
1907static int
1908nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1909 int flags, struct nameidata *nd)
1da177e4 1910{
ad389da7 1911 struct path path = {
4ac91378 1912 .mnt = nd->path.mnt,
ad389da7
TM		 1913 .dentry = dentry,
1914 };
1da177e4
LT		 1915 struct nfs4_state *state;
1916 struct rpc_cred *cred;
1917 int status = 0;
1918
98a8e323 1919 cred = rpc_lookup_cred();
1da177e4
LT		 1920 if (IS_ERR(cred)) {
1921 status = PTR_ERR(cred);
1922 goto out;
1923 }
ad389da7 1924 state = nfs4_do_open(dir, &path, flags, sattr, cred);
d4d9cdcb 1925 d_drop(dentry);
1da177e4
LT		 1926 if (IS_ERR(state)) {
1927 status = PTR_ERR(state);
659bfcd6 1928 goto out_putcred;
1da177e4 1929 }
d4d9cdcb 1930 d_add(dentry, igrab(state->inode));
d75340cc 1931 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 1932 if (flags & O_EXCL) {
1933 struct nfs_fattr fattr;
659bfcd6 1934 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 1935 if (status == 0)
65e4308d 1936 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 1937 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 1938 }
ad389da7 1939 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
4a35bd41 1940 status = nfs4_intent_set_file(nd, &path, state);
02a913a7 1941 else
a49c3c77 1942 nfs4_close_sync(&path, state, flags);
659bfcd6
TM		 1943out_putcred:
1944 put_rpccred(cred);
1da177e4
LT		 1945out:
1946 return status;
1947}
1948
1949static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1950{
16e42959 1951 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 1952 struct nfs_removeargs args = {
1da177e4 1953 .fh = NFS_FH(dir),
4fdc17b2
TM		 1954 .name.len = name->len,
1955 .name.name = name->name,
16e42959
TM		 1956 .bitmask = server->attr_bitmask,
1957 };
4fdc17b2 1958 struct nfs_removeres res = {
16e42959 1959 .server = server,
1da177e4 1960 };
1da177e4 1961 struct rpc_message msg = {
4fdc17b2
TM		 1962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1963 .rpc_argp = &args,
1964 .rpc_resp = &res,
1da177e4
LT		 1965 };
1966 int status;
1967
4fdc17b2 1968 nfs_fattr_init(&res.dir_attr);
16e42959
TM		 1969 status = rpc_call_sync(server->client, &msg, 0);
1970 if (status == 0) {
1971 update_changeattr(dir, &res.cinfo);
4fdc17b2 1972 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 1973 }
1da177e4
LT		 1974 return status;
1975}
1976
1977static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1978{
1979 struct nfs4_exception exception = { };
1980 int err;
1981 do {
1982 err = nfs4_handle_exception(NFS_SERVER(dir),
1983 _nfs4_proc_remove(dir, name),
1984 &exception);
1985 } while (exception.retry);
1986 return err;
1987}
1988
e4eff1a6 1989static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 1990{
e4eff1a6
TM		 1991 struct nfs_server *server = NFS_SERVER(dir);
1992 struct nfs_removeargs *args = msg->rpc_argp;
1993 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 1994
e4eff1a6
TM		 1995 args->bitmask = server->attr_bitmask;
1996 res->server = server;
1da177e4 1997 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 1998}
1999
e4eff1a6 2000static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2001{
e4eff1a6
TM		 2002 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2003
2004 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
2005 return 0;
2006 update_changeattr(dir, &res->cinfo);
2007 nfs_post_op_update_inode(dir, &res->dir_attr);
2008 return 1;
1da177e4
LT		 2009}
2010
2011static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2012 struct inode *new_dir, struct qstr *new_name)
2013{
6caf2c82 2014 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2015 struct nfs4_rename_arg arg = {
2016 .old_dir = NFS_FH(old_dir),
2017 .new_dir = NFS_FH(new_dir),
2018 .old_name = old_name,
2019 .new_name = new_name,
6caf2c82
TM		 2020 .bitmask = server->attr_bitmask,
2021 };
2022 struct nfs_fattr old_fattr, new_fattr;
2023 struct nfs4_rename_res res = {
2024 .server = server,
2025 .old_fattr = &old_fattr,
2026 .new_fattr = &new_fattr,
1da177e4 2027 };
1da177e4
LT		 2028 struct rpc_message msg = {
2029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2030 .rpc_argp = &arg,
2031 .rpc_resp = &res,
2032 };
2033 int status;
2034
6caf2c82
TM		 2035 nfs_fattr_init(res.old_fattr);
2036 nfs_fattr_init(res.new_fattr);
2037 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2038
2039 if (!status) {
2040 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2041 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2042 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2043 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2044 }
2045 return status;
2046}
2047
2048static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2049 struct inode *new_dir, struct qstr *new_name)
2050{
2051 struct nfs4_exception exception = { };
2052 int err;
2053 do {
2054 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2055 _nfs4_proc_rename(old_dir, old_name,
2056 new_dir, new_name),
2057 &exception);
2058 } while (exception.retry);
2059 return err;
2060}
2061
2062static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2063{
91ba2eee 2064 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2065 struct nfs4_link_arg arg = {
2066 .fh = NFS_FH(inode),
2067 .dir_fh = NFS_FH(dir),
2068 .name = name,
91ba2eee
TM		 2069 .bitmask = server->attr_bitmask,
2070 };
2071 struct nfs_fattr fattr, dir_attr;
2072 struct nfs4_link_res res = {
2073 .server = server,
2074 .fattr = &fattr,
2075 .dir_attr = &dir_attr,
1da177e4 2076 };
1da177e4
LT		 2077 struct rpc_message msg = {
2078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2079 .rpc_argp = &arg,
91ba2eee 2080 .rpc_resp = &res,
1da177e4
LT		 2081 };
2082 int status;
2083
91ba2eee
TM		 2084 nfs_fattr_init(res.fattr);
2085 nfs_fattr_init(res.dir_attr);
2086 status = rpc_call_sync(server->client, &msg, 0);
2087 if (!status) {
2088 update_changeattr(dir, &res.cinfo);
2089 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2090 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2091 }
1da177e4
LT		 2092
2093 return status;
2094}
2095
2096static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2097{
2098 struct nfs4_exception exception = { };
2099 int err;
2100 do {
2101 err = nfs4_handle_exception(NFS_SERVER(inode),
2102 _nfs4_proc_link(inode, dir, name),
2103 &exception);
2104 } while (exception.retry);
2105 return err;
2106}
2107
57dc9a57
TM		 2108struct nfs4_createdata {
2109 struct rpc_message msg;
2110 struct nfs4_create_arg arg;
2111 struct nfs4_create_res res;
2112 struct nfs_fh fh;
2113 struct nfs_fattr fattr;
2114 struct nfs_fattr dir_fattr;
2115};
2116
2117static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2118 struct qstr *name, struct iattr *sattr, u32 ftype)
2119{
2120 struct nfs4_createdata *data;
2121
2122 data = kzalloc(sizeof(*data), GFP_KERNEL);
2123 if (data != NULL) {
2124 struct nfs_server *server = NFS_SERVER(dir);
2125
2126 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2127 data->msg.rpc_argp = &data->arg;
2128 data->msg.rpc_resp = &data->res;
2129 data->arg.dir_fh = NFS_FH(dir);
2130 data->arg.server = server;
2131 data->arg.name = name;
2132 data->arg.attrs = sattr;
2133 data->arg.ftype = ftype;
2134 data->arg.bitmask = server->attr_bitmask;
2135 data->res.server = server;
2136 data->res.fh = &data->fh;
2137 data->res.fattr = &data->fattr;
2138 data->res.dir_fattr = &data->dir_fattr;
2139 nfs_fattr_init(data->res.fattr);
2140 nfs_fattr_init(data->res.dir_fattr);
2141 }
2142 return data;
2143}
2144
2145static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2146{
2147 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2148 if (status == 0) {
2149 update_changeattr(dir, &data->res.dir_cinfo);
2150 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2151 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2152 }
2153 return status;
2154}
2155
2156static void nfs4_free_createdata(struct nfs4_createdata *data)
2157{
2158 kfree(data);
2159}
2160
4f390c15 2161static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2162 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2163{
57dc9a57
TM		 2164 struct nfs4_createdata *data;
2165 int status = -ENAMETOOLONG;
1da177e4 2166
94a6d753 2167 if (len > NFS4_MAXPATHLEN)
57dc9a57 2168 goto out;
4f390c15 2169
57dc9a57
TM		 2170 status = -ENOMEM;
2171 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2172 if (data == NULL)
2173 goto out;
2174
2175 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2176 data->arg.u.symlink.pages = &page;
2177 data->arg.u.symlink.len = len;
1da177e4 2178
57dc9a57
TM		 2179 status = nfs4_do_create(dir, dentry, data);
2180
2181 nfs4_free_createdata(data);
2182out:
1da177e4
LT		 2183 return status;
2184}
2185
4f390c15 2186static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2187 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2188{
2189 struct nfs4_exception exception = { };
2190 int err;
2191 do {
2192 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2193 _nfs4_proc_symlink(dir, dentry, page,
2194 len, sattr),
1da177e4
LT		 2195 &exception);
2196 } while (exception.retry);
2197 return err;
2198}
2199
2200static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2201 struct iattr *sattr)
2202{
57dc9a57
TM		 2203 struct nfs4_createdata *data;
2204 int status = -ENOMEM;
1da177e4 2205
57dc9a57
TM		 2206 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2207 if (data == NULL)
2208 goto out;
2209
2210 status = nfs4_do_create(dir, dentry, data);
2211
2212 nfs4_free_createdata(data);
2213out:
1da177e4
LT		 2214 return status;
2215}
2216
2217static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2218 struct iattr *sattr)
2219{
2220 struct nfs4_exception exception = { };
2221 int err;
2222 do {
2223 err = nfs4_handle_exception(NFS_SERVER(dir),
2224 _nfs4_proc_mkdir(dir, dentry, sattr),
2225 &exception);
2226 } while (exception.retry);
2227 return err;
2228}
2229
2230static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2231 u64 cookie, struct page *page, unsigned int count, int plus)
2232{
2233 struct inode *dir = dentry->d_inode;
2234 struct nfs4_readdir_arg args = {
2235 .fh = NFS_FH(dir),
2236 .pages = &page,
2237 .pgbase = 0,
2238 .count = count,
2239 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2240 };
2241 struct nfs4_readdir_res res;
2242 struct rpc_message msg = {
2243 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2244 .rpc_argp = &args,
2245 .rpc_resp = &res,
2246 .rpc_cred = cred,
2247 };
2248 int status;
2249
3110ff80 2250 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2251 dentry->d_parent->d_name.name,
2252 dentry->d_name.name,
2253 (unsigned long long)cookie);
1da177e4
LT		 2254 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2255 res.pgbase = args.pgbase;
2256 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2257 if (status == 0)
2258 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2259
2260 nfs_invalidate_atime(dir);
2261
3110ff80 2262 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2263 return status;
2264}
2265
2266static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2267 u64 cookie, struct page *page, unsigned int count, int plus)
2268{
2269 struct nfs4_exception exception = { };
2270 int err;
2271 do {
2272 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2273 _nfs4_proc_readdir(dentry, cred, cookie,
2274 page, count, plus),
2275 &exception);
2276 } while (exception.retry);
2277 return err;
2278}
2279
2280static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2281 struct iattr *sattr, dev_t rdev)
2282{
57dc9a57
TM		 2283 struct nfs4_createdata *data;
2284 int mode = sattr->ia_mode;
2285 int status = -ENOMEM;
1da177e4
LT		 2286
2287 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2288 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2289
2290 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2291 if (data == NULL)
2292 goto out;
2293
1da177e4 2294 if (S_ISFIFO(mode))
57dc9a57 2295 data->arg.ftype = NF4FIFO;
1da177e4 2296 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2297 data->arg.ftype = NF4BLK;
2298 data->arg.u.device.specdata1 = MAJOR(rdev);
2299 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2300 }
2301 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2302 data->arg.ftype = NF4CHR;
2303 data->arg.u.device.specdata1 = MAJOR(rdev);
2304 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2305 }
1da177e4 2306
57dc9a57
TM		 2307 status = nfs4_do_create(dir, dentry, data);
2308
2309 nfs4_free_createdata(data);
2310out:
1da177e4
LT		 2311 return status;
2312}
2313
2314static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2315 struct iattr *sattr, dev_t rdev)
2316{
2317 struct nfs4_exception exception = { };
2318 int err;
2319 do {
2320 err = nfs4_handle_exception(NFS_SERVER(dir),
2321 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2322 &exception);
2323 } while (exception.retry);
2324 return err;
2325}
2326
2327static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2328 struct nfs_fsstat *fsstat)
2329{
2330 struct nfs4_statfs_arg args = {
2331 .fh = fhandle,
2332 .bitmask = server->attr_bitmask,
2333 };
2334 struct rpc_message msg = {
2335 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2336 .rpc_argp = &args,
2337 .rpc_resp = fsstat,
2338 };
2339
0e574af1 2340 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2341 return rpc_call_sync(server->client, &msg, 0);
2342}
2343
2344static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2345{
2346 struct nfs4_exception exception = { };
2347 int err;
2348 do {
2349 err = nfs4_handle_exception(server,
2350 _nfs4_proc_statfs(server, fhandle, fsstat),
2351 &exception);
2352 } while (exception.retry);
2353 return err;
2354}
2355
2356static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2357 struct nfs_fsinfo *fsinfo)
2358{
2359 struct nfs4_fsinfo_arg args = {
2360 .fh = fhandle,
2361 .bitmask = server->attr_bitmask,
2362 };
2363 struct rpc_message msg = {
2364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2365 .rpc_argp = &args,
2366 .rpc_resp = fsinfo,
2367 };
2368
2369 return rpc_call_sync(server->client, &msg, 0);
2370}
2371
2372static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2373{
2374 struct nfs4_exception exception = { };
2375 int err;
2376
2377 do {
2378 err = nfs4_handle_exception(server,
2379 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2380 &exception);
2381 } while (exception.retry);
2382 return err;
2383}
2384
2385static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2386{
0e574af1 2387 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2388 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2389}
2390
2391static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2392 struct nfs_pathconf *pathconf)
2393{
2394 struct nfs4_pathconf_arg args = {
2395 .fh = fhandle,
2396 .bitmask = server->attr_bitmask,
2397 };
2398 struct rpc_message msg = {
2399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2400 .rpc_argp = &args,
2401 .rpc_resp = pathconf,
2402 };
2403
2404 /* None of the pathconf attributes are mandatory to implement */
2405 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2406 memset(pathconf, 0, sizeof(*pathconf));
2407 return 0;
2408 }
2409
0e574af1 2410 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2411 return rpc_call_sync(server->client, &msg, 0);
2412}
2413
2414static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2415 struct nfs_pathconf *pathconf)
2416{
2417 struct nfs4_exception exception = { };
2418 int err;
2419
2420 do {
2421 err = nfs4_handle_exception(server,
2422 _nfs4_proc_pathconf(server, fhandle, pathconf),
2423 &exception);
2424 } while (exception.retry);
2425 return err;
2426}
2427
ec06c096 2428static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2429{
ec06c096 2430 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2431
ec06c096 2432 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2433 rpc_restart_call(task);
ec06c096 2434 return -EAGAIN;
1da177e4 2435 }
8850df99
TM		 2436
2437 nfs_invalidate_atime(data->inode);
1da177e4 2438 if (task->tk_status > 0)
ec06c096
TM		 2439 renew_lease(server, data->timestamp);
2440 return 0;
1da177e4
LT		 2441}
2442
bdc7f021 2443static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2444{
1da177e4 2445 data->timestamp = jiffies;
bdc7f021 2446 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2447}
2448
788e7a89 2449static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2450{
1da177e4
LT		 2451 struct inode *inode = data->inode;
2452
2453 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2454 rpc_restart_call(task);
788e7a89 2455 return -EAGAIN;
1da177e4 2456 }
4f9838c7 2457 if (task->tk_status >= 0) {
1da177e4 2458 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2459 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2460 }
788e7a89 2461 return 0;
1da177e4
LT		 2462}
2463
bdc7f021 2464static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2465{
bdc7f021
TM		 2466 struct nfs_server *server = NFS_SERVER(data->inode);
2467
4f9838c7
TM		 2468 data->args.bitmask = server->attr_bitmask;
2469 data->res.server = server;
1da177e4
LT		 2470 data->timestamp = jiffies;
2471
bdc7f021 2472 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2473}
2474
788e7a89 2475static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2476{
1da177e4
LT		 2477 struct inode *inode = data->inode;
2478
2479 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2480 rpc_restart_call(task);
788e7a89 2481 return -EAGAIN;
1da177e4 2482 }
9e08a3c5 2483 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2484 return 0;
1da177e4
LT		 2485}
2486
bdc7f021 2487static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2488{
788e7a89 2489 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2490
4f9838c7
TM		 2491 data->args.bitmask = server->attr_bitmask;
2492 data->res.server = server;
bdc7f021 2493 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2494}
2495
2496/*
2497 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2498 * standalone procedure for queueing an asynchronous RENEW.
2499 */
963d8fe5 2500static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2501{
adfa6f98 2502 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2503 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2504
2505 if (task->tk_status < 0) {
2506 switch (task->tk_status) {
2507 case -NFS4ERR_STALE_CLIENTID:
2508 case -NFS4ERR_EXPIRED:
2509 case -NFS4ERR_CB_PATH_DOWN:
2510 nfs4_schedule_state_recovery(clp);
2511 }
2512 return;
2513 }
2514 spin_lock(&clp->cl_lock);
2515 if (time_before(clp->cl_last_renewal,timestamp))
2516 clp->cl_last_renewal = timestamp;
2517 spin_unlock(&clp->cl_lock);
2518}
2519
963d8fe5
TM		 2520static const struct rpc_call_ops nfs4_renew_ops = {
2521 .rpc_call_done = nfs4_renew_done,
2522};
2523
adfa6f98 2524int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2525{
2526 struct rpc_message msg = {
2527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2528 .rpc_argp = clp,
b4454fe1 2529 .rpc_cred = cred,
1da177e4
LT		 2530 };
2531
2532 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2533 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2534}
2535
adfa6f98 2536int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2537{
2538 struct rpc_message msg = {
2539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2540 .rpc_argp = clp,
b4454fe1 2541 .rpc_cred = cred,
1da177e4
LT		 2542 };
2543 unsigned long now = jiffies;
2544 int status;
2545
2546 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2547 if (status < 0)
2548 return status;
2549 spin_lock(&clp->cl_lock);
2550 if (time_before(clp->cl_last_renewal,now))
2551 clp->cl_last_renewal = now;
2552 spin_unlock(&clp->cl_lock);
2553 return 0;
2554}
2555
aa1870af
BF		 2556static inline int nfs4_server_supports_acls(struct nfs_server *server)
2557{
2558 return (server->caps & NFS_CAP_ACLS)
2559 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2560 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2561}
2562
2563/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2564 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2565 * the stack.
2566 */
2567#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2568
2569static void buf_to_pages(const void *buf, size_t buflen,
2570 struct page **pages, unsigned int *pgbase)
2571{
2572 const void *p = buf;
2573
2574 *pgbase = offset_in_page(buf);
2575 p -= *pgbase;
2576 while (p < buf + buflen) {
2577 *(pages++) = virt_to_page(p);
2578 p += PAGE_CACHE_SIZE;
2579 }
2580}
2581
e50a1c2e
BF		 2582struct nfs4_cached_acl {
2583 int cached;
2584 size_t len;
3e9d4154 2585 char data[0];
e50a1c2e
BF		 2586};
2587
2588static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2589{
2590 struct nfs_inode *nfsi = NFS_I(inode);
2591
2592 spin_lock(&inode->i_lock);
2593 kfree(nfsi->nfs4_acl);
2594 nfsi->nfs4_acl = acl;
2595 spin_unlock(&inode->i_lock);
2596}
2597
2598static void nfs4_zap_acl_attr(struct inode *inode)
2599{
2600 nfs4_set_cached_acl(inode, NULL);
2601}
2602
2603static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2604{
2605 struct nfs_inode *nfsi = NFS_I(inode);
2606 struct nfs4_cached_acl *acl;
2607 int ret = -ENOENT;
2608
2609 spin_lock(&inode->i_lock);
2610 acl = nfsi->nfs4_acl;
2611 if (acl == NULL)
2612 goto out;
2613 if (buf == NULL) /* user is just asking for length */
2614 goto out_len;
2615 if (acl->cached == 0)
2616 goto out;
2617 ret = -ERANGE; /* see getxattr(2) man page */
2618 if (acl->len > buflen)
2619 goto out;
2620 memcpy(buf, acl->data, acl->len);
2621out_len:
2622 ret = acl->len;
2623out:
2624 spin_unlock(&inode->i_lock);
2625 return ret;
2626}
2627
2628static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2629{
2630 struct nfs4_cached_acl *acl;
2631
2632 if (buf && acl_len <= PAGE_SIZE) {
2633 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2634 if (acl == NULL)
2635 goto out;
2636 acl->cached = 1;
2637 memcpy(acl->data, buf, acl_len);
2638 } else {
2639 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2640 if (acl == NULL)
2641 goto out;
2642 acl->cached = 0;
2643 }
2644 acl->len = acl_len;
2645out:
2646 nfs4_set_cached_acl(inode, acl);
2647}
2648
16b4289c 2649static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2650{
aa1870af
BF		 2651 struct page *pages[NFS4ACL_MAXPAGES];
2652 struct nfs_getaclargs args = {
2653 .fh = NFS_FH(inode),
2654 .acl_pages = pages,
2655 .acl_len = buflen,
2656 };
2657 size_t resp_len = buflen;
e50a1c2e 2658 void *resp_buf;
aa1870af
BF		 2659 struct rpc_message msg = {
2660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2661 .rpc_argp = &args,
2662 .rpc_resp = &resp_len,
2663 };
e50a1c2e 2664 struct page *localpage = NULL;
aa1870af
BF		 2665 int ret;
2666
e50a1c2e
BF		 2667 if (buflen < PAGE_SIZE) {
2668 /* As long as we're doing a round trip to the server anyway,
2669 * let's be prepared for a page of acl data. */
2670 localpage = alloc_page(GFP_KERNEL);
2671 resp_buf = page_address(localpage);
2672 if (localpage == NULL)
2673 return -ENOMEM;
2674 args.acl_pages[0] = localpage;
2675 args.acl_pgbase = 0;
1d95db8e 2676 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2677 } else {
2678 resp_buf = buf;
2679 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2680 }
aa1870af 2681 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2682 if (ret)
2683 goto out_free;
2684 if (resp_len > args.acl_len)
2685 nfs4_write_cached_acl(inode, NULL, resp_len);
2686 else
2687 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2688 if (buf) {
2689 ret = -ERANGE;
2690 if (resp_len > buflen)
2691 goto out_free;
2692 if (localpage)
2693 memcpy(buf, resp_buf, resp_len);
2694 }
2695 ret = resp_len;
2696out_free:
2697 if (localpage)
2698 __free_page(localpage);
aa1870af
BF		 2699 return ret;
2700}
2701
16b4289c
TM		 2702static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2703{
2704 struct nfs4_exception exception = { };
2705 ssize_t ret;
2706 do {
2707 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2708 if (ret >= 0)
2709 break;
2710 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2711 } while (exception.retry);
2712 return ret;
2713}
2714
e50a1c2e
BF		 2715static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2716{
2717 struct nfs_server *server = NFS_SERVER(inode);
2718 int ret;
2719
2720 if (!nfs4_server_supports_acls(server))
2721 return -EOPNOTSUPP;
2722 ret = nfs_revalidate_inode(server, inode);
2723 if (ret < 0)
2724 return ret;
f41f7418
TM		 2725 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2726 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 2727 ret = nfs4_read_cached_acl(inode, buf, buflen);
2728 if (ret != -ENOENT)
2729 return ret;
2730 return nfs4_get_acl_uncached(inode, buf, buflen);
2731}
2732
16b4289c 2733static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2734{
2735 struct nfs_server *server = NFS_SERVER(inode);
2736 struct page *pages[NFS4ACL_MAXPAGES];
2737 struct nfs_setaclargs arg = {
2738 .fh = NFS_FH(inode),
2739 .acl_pages = pages,
2740 .acl_len = buflen,
2741 };
2742 struct rpc_message msg = {
2743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2744 .rpc_argp = &arg,
2745 .rpc_resp = NULL,
2746 };
2747 int ret;
2748
2749 if (!nfs4_server_supports_acls(server))
2750 return -EOPNOTSUPP;
642ac549 2751 nfs_inode_return_delegation(inode);
4b580ee3 2752 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2753 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
f41f7418
TM		 2754 nfs_access_zap_cache(inode);
2755 nfs_zap_acl_cache(inode);
4b580ee3
BF		 2756 return ret;
2757}
2758
16b4289c
TM		 2759static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2760{
2761 struct nfs4_exception exception = { };
2762 int err;
2763 do {
2764 err = nfs4_handle_exception(NFS_SERVER(inode),
2765 __nfs4_proc_set_acl(inode, buf, buflen),
2766 &exception);
2767 } while (exception.retry);
2768 return err;
2769}
2770
1da177e4 2771static int
faf5f49c 2772nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2773{
7539bbab 2774 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2775
2776 if (!clp || task->tk_status >= 0)
2777 return 0;
2778 switch(task->tk_status) {
2779 case -NFS4ERR_STALE_CLIENTID:
2780 case -NFS4ERR_STALE_STATEID:
2781 case -NFS4ERR_EXPIRED:
5d00837b 2782 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 2783 nfs4_schedule_state_recovery(clp);
433fbe4c 2784 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
fda13939 2785 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 2786 task->tk_status = 0;
2787 return -EAGAIN;
1da177e4 2788 case -NFS4ERR_DELAY:
2e96d286 2789 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 2790 case -NFS4ERR_GRACE:
1da177e4
LT		 2791 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2792 task->tk_status = 0;
2793 return -EAGAIN;
2794 case -NFS4ERR_OLD_STATEID:
2795 task->tk_status = 0;
2796 return -EAGAIN;
2797 }
2798 task->tk_status = nfs4_map_errors(task->tk_status);
2799 return 0;
2800}
2801
150030b7 2802static int nfs4_wait_bit_killable(void *word)
433fbe4c 2803{
150030b7 2804 if (fatal_signal_pending(current))
433fbe4c
TM		 2805 return -ERESTARTSYS;
2806 schedule();
2807 return 0;
2808}
2809
adfa6f98 2810static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2811{
433fbe4c 2812 int res;
1da177e4
LT		 2813
2814 might_sleep();
2815
e148582e
TM		 2816 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2817
433fbe4c 2818 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
150030b7 2819 nfs4_wait_bit_killable, TASK_KILLABLE);
e148582e
TM		 2820
2821 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT		 2822 return res;
2823}
2824
2825static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2826{
1da177e4
LT		 2827 int res = 0;
2828
2829 might_sleep();
2830
2831 if (*timeout <= 0)
2832 *timeout = NFS4_POLL_RETRY_MIN;
2833 if (*timeout > NFS4_POLL_RETRY_MAX)
2834 *timeout = NFS4_POLL_RETRY_MAX;
150030b7
MW		 2835 schedule_timeout_killable(*timeout);
2836 if (fatal_signal_pending(current))
2837 res = -ERESTARTSYS;
1da177e4
LT		 2838 *timeout <<= 1;
2839 return res;
2840}
2841
2842/* This is the error handling routine for processes that are allowed
2843 * to sleep.
2844 */
10afec90 2845static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2846{
7539bbab 2847 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2848 int ret = errorcode;
2849
2850 exception->retry = 0;
2851 switch(errorcode) {
2852 case 0:
2853 return 0;
2854 case -NFS4ERR_STALE_CLIENTID:
2855 case -NFS4ERR_STALE_STATEID:
2856 case -NFS4ERR_EXPIRED:
433fbe4c 2857 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2858 ret = nfs4_wait_clnt_recover(server->client, clp);
2859 if (ret == 0)
2860 exception->retry = 1;
2861 break;
c514983d 2862 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2863 case -NFS4ERR_GRACE:
2864 case -NFS4ERR_DELAY:
2865 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2866 if (ret != 0)
2867 break;
1da177e4 2868 case -NFS4ERR_OLD_STATEID:
2c56617d 2869 exception->retry = 1;
1da177e4
LT		 2870 }
2871 /* We failed to handle the error */
2872 return nfs4_map_errors(ret);
2873}
2874
adfa6f98 2875int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2876{
2877 nfs4_verifier sc_verifier;
2878 struct nfs4_setclientid setclientid = {
2879 .sc_verifier = &sc_verifier,
2880 .sc_prog = program,
2881 };
2882 struct rpc_message msg = {
2883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2884 .rpc_argp = &setclientid,
2885 .rpc_resp = clp,
286d7d6a 2886 .rpc_cred = cred,
1da177e4 2887 };
bc4785cd 2888 __be32 *p;
1da177e4
LT		 2889 int loop = 0;
2890 int status;
2891
bc4785cd 2892 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2893 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2894 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2895
2896 for(;;) {
2897 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 2898 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 2899 clp->cl_ipaddr,
2900 rpc_peeraddr2str(clp->cl_rpcclient,
2901 RPC_DISPLAY_ADDR),
69dd716c
TM		 2902 rpc_peeraddr2str(clp->cl_rpcclient,
2903 RPC_DISPLAY_PROTO),
78ea323b 2904 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 2905 clp->cl_id_uniquifier);
2906 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 2907 sizeof(setclientid.sc_netid),
2908 rpc_peeraddr2str(clp->cl_rpcclient,
2909 RPC_DISPLAY_NETID));
1da177e4 2910 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 2911 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 2912 clp->cl_ipaddr, port >> 8, port & 255);
2913
2914 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2915 if (status != -NFS4ERR_CLID_INUSE)
2916 break;
2917 if (signalled())
2918 break;
2919 if (loop++ & 1)
2920 ssleep(clp->cl_lease_time + 1);
2921 else
2922 if (++clp->cl_id_uniquifier == 0)
2923 break;
2924 }
2925 return status;
2926}
2927
adfa6f98 2928static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2929{
2930 struct nfs_fsinfo fsinfo;
2931 struct rpc_message msg = {
2932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2933 .rpc_argp = clp,
2934 .rpc_resp = &fsinfo,
286d7d6a 2935 .rpc_cred = cred,
1da177e4
LT		 2936 };
2937 unsigned long now;
2938 int status;
2939
2940 now = jiffies;
2941 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2942 if (status == 0) {
2943 spin_lock(&clp->cl_lock);
2944 clp->cl_lease_time = fsinfo.lease_time * HZ;
2945 clp->cl_last_renewal = now;
2946 spin_unlock(&clp->cl_lock);
2947 }
2948 return status;
2949}
2950
adfa6f98 2951int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 2952{
77e03677 2953 long timeout = 0;
51581f3b
TM		 2954 int err;
2955 do {
2956 err = _nfs4_proc_setclientid_confirm(clp, cred);
2957 switch (err) {
2958 case 0:
2959 return err;
2960 case -NFS4ERR_RESOURCE:
2961 /* The IBM lawyers misread another document! */
2962 case -NFS4ERR_DELAY:
2963 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2964 }
2965 } while (err == 0);
2966 return err;
2967}
2968
fe650407
TM		 2969struct nfs4_delegreturndata {
2970 struct nfs4_delegreturnargs args;
fa178f29 2971 struct nfs4_delegreturnres res;
fe650407
TM		 2972 struct nfs_fh fh;
2973 nfs4_stateid stateid;
26e976a8 2974 unsigned long timestamp;
fa178f29 2975 struct nfs_fattr fattr;
fe650407
TM		 2976 int rpc_status;
2977};
2978
fe650407
TM		 2979static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2980{
2981 struct nfs4_delegreturndata *data = calldata;
2982 data->rpc_status = task->tk_status;
26e976a8 2983 if (data->rpc_status == 0)
fa178f29 2984 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 2985}
2986
2987static void nfs4_delegreturn_release(void *calldata)
2988{
fe650407
TM		 2989 kfree(calldata);
2990}
2991
c8d149f3 2992static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 2993 .rpc_call_done = nfs4_delegreturn_done,
2994 .rpc_release = nfs4_delegreturn_release,
2995};
2996
e6f81075 2997static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 2998{
2999 struct nfs4_delegreturndata *data;
fa178f29 3000 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3001 struct rpc_task *task;
5138fde0
TM		 3002 struct rpc_message msg = {
3003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3004 .rpc_cred = cred,
3005 };
c970aa85
TM		 3006 struct rpc_task_setup task_setup_data = {
3007 .rpc_client = server->client,
5138fde0 3008 .rpc_message = &msg,
c970aa85
TM		 3009 .callback_ops = &nfs4_delegreturn_ops,
3010 .flags = RPC_TASK_ASYNC,
3011 };
e6f81075 3012 int status = 0;
fe650407
TM		 3013
3014 data = kmalloc(sizeof(*data), GFP_KERNEL);
3015 if (data == NULL)
3016 return -ENOMEM;
3017 data->args.fhandle = &data->fh;
3018 data->args.stateid = &data->stateid;
fa178f29 3019 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3020 nfs_copy_fh(&data->fh, NFS_FH(inode));
3021 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3022 data->res.fattr = &data->fattr;
3023 data->res.server = server;
5138fde0 3024 nfs_fattr_init(data->res.fattr);
26e976a8 3025 data->timestamp = jiffies;
fe650407
TM		 3026 data->rpc_status = 0;
3027
c970aa85 3028 task_setup_data.callback_data = data;
5138fde0
TM		 3029 msg.rpc_argp = &data->args,
3030 msg.rpc_resp = &data->res,
c970aa85 3031 task = rpc_run_task(&task_setup_data);
7a1218a2 3032 if (IS_ERR(task))
fe650407 3033 return PTR_ERR(task);
e6f81075
TM		 3034 if (!issync)
3035 goto out;
fe650407 3036 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3037 if (status != 0)
3038 goto out;
3039 status = data->rpc_status;
3040 if (status != 0)
3041 goto out;
3042 nfs_refresh_inode(inode, &data->fattr);
3043out:
e6b3c4db 3044 rpc_put_task(task);
fe650407 3045 return status;
1da177e4
LT		 3046}
3047
e6f81075 3048int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3049{
3050 struct nfs_server *server = NFS_SERVER(inode);
3051 struct nfs4_exception exception = { };
3052 int err;
3053 do {
e6f81075 3054 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3055 switch (err) {
3056 case -NFS4ERR_STALE_STATEID:
3057 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3058 case 0:
3059 return 0;
3060 }
3061 err = nfs4_handle_exception(server, err, &exception);
3062 } while (exception.retry);
3063 return err;
3064}
3065
3066#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3067#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3068
3069/*
3070 * sleep, with exponential backoff, and retry the LOCK operation.
3071 */
3072static unsigned long
3073nfs4_set_lock_task_retry(unsigned long timeout)
3074{
150030b7 3075 schedule_timeout_killable(timeout);
1da177e4
LT		 3076 timeout <<= 1;
3077 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3078 return NFS4_LOCK_MAXTIMEOUT;
3079 return timeout;
3080}
3081
1da177e4
LT		 3082static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3083{
3084 struct inode *inode = state->inode;
3085 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3086 struct nfs_client *clp = server->nfs_client;
911d1aaf 3087 struct nfs_lockt_args arg = {
1da177e4 3088 .fh = NFS_FH(inode),
911d1aaf 3089 .fl = request,
1da177e4 3090 };
911d1aaf
TM		 3091 struct nfs_lockt_res res = {
3092 .denied = request,
1da177e4
LT		 3093 };
3094 struct rpc_message msg = {
3095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3096 .rpc_argp = &arg,
3097 .rpc_resp = &res,
3098 .rpc_cred = state->owner->so_cred,
3099 };
1da177e4
LT		 3100 struct nfs4_lock_state *lsp;
3101 int status;
3102
3103 down_read(&clp->cl_sem);
911d1aaf 3104 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3105 status = nfs4_set_lock_state(state, request);
3106 if (status != 0)
3107 goto out;
3108 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3109 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3110 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3111 switch (status) {
3112 case 0:
3113 request->fl_type = F_UNLCK;
3114 break;
3115 case -NFS4ERR_DENIED:
3116 status = 0;
1da177e4 3117 }
70cc6487 3118 request->fl_ops->fl_release_private(request);
8d0a8a9d 3119out:
1da177e4
LT		 3120 up_read(&clp->cl_sem);
3121 return status;
3122}
3123
3124static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3125{
3126 struct nfs4_exception exception = { };
3127 int err;
3128
3129 do {
3130 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3131 _nfs4_proc_getlk(state, cmd, request),
3132 &exception);
3133 } while (exception.retry);
3134 return err;
3135}
3136
3137static int do_vfs_lock(struct file *file, struct file_lock *fl)
3138{
3139 int res = 0;
3140 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3141 case FL_POSIX:
3142 res = posix_lock_file_wait(file, fl);
3143 break;
3144 case FL_FLOCK:
3145 res = flock_lock_file_wait(file, fl);
3146 break;
3147 default:
3148 BUG();
3149 }
1da177e4
LT		 3150 return res;
3151}
3152
faf5f49c 3153struct nfs4_unlockdata {
911d1aaf
TM		 3154 struct nfs_locku_args arg;
3155 struct nfs_locku_res res;
faf5f49c
TM		 3156 struct nfs4_lock_state *lsp;
3157 struct nfs_open_context *ctx;
911d1aaf
TM		 3158 struct file_lock fl;
3159 const struct nfs_server *server;
26e976a8 3160 unsigned long timestamp;
faf5f49c
TM		 3161};
3162
911d1aaf
TM		 3163static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3164 struct nfs_open_context *ctx,
3165 struct nfs4_lock_state *lsp,
3166 struct nfs_seqid *seqid)
3167{
3168 struct nfs4_unlockdata *p;
3169 struct inode *inode = lsp->ls_state->inode;
3170
3171 p = kmalloc(sizeof(*p), GFP_KERNEL);
3172 if (p == NULL)
3173 return NULL;
3174 p->arg.fh = NFS_FH(inode);
3175 p->arg.fl = &p->fl;
3176 p->arg.seqid = seqid;
c1d51931 3177 p->res.seqid = seqid;
911d1aaf
TM		 3178 p->arg.stateid = &lsp->ls_stateid;
3179 p->lsp = lsp;
3180 atomic_inc(&lsp->ls_count);
3181 /* Ensure we don't close file until we're done freeing locks! */
3182 p->ctx = get_nfs_open_context(ctx);
3183 memcpy(&p->fl, fl, sizeof(p->fl));
3184 p->server = NFS_SERVER(inode);
3185 return p;
3186}
3187
06f814a3 3188static void nfs4_locku_release_calldata(void *data)
faf5f49c 3189{
963d8fe5 3190 struct nfs4_unlockdata *calldata = data;
911d1aaf 3191 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3192 nfs4_put_lock_state(calldata->lsp);
3193 put_nfs_open_context(calldata->ctx);
3194 kfree(calldata);
faf5f49c
TM		 3195}
3196
963d8fe5 3197static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3198{
963d8fe5 3199 struct nfs4_unlockdata *calldata = data;
faf5f49c 3200
06f814a3
TM		 3201 if (RPC_ASSASSINATED(task))
3202 return;
faf5f49c
TM		 3203 switch (task->tk_status) {
3204 case 0:
3205 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3206 calldata->res.stateid.data,
faf5f49c 3207 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3208 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3209 break;
3210 case -NFS4ERR_STALE_STATEID:
3211 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3212 break;
3213 default:
a6a352e9 3214 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
faf5f49c 3215 rpc_restart_call(task);
faf5f49c 3216 }
faf5f49c
TM		 3217}
3218
4ce70ada 3219static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3220{
4ce70ada 3221 struct nfs4_unlockdata *calldata = data;
faf5f49c 3222
911d1aaf 3223 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3224 return;
3225 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3226 /* Note: exit _without_ running nfs4_locku_done */
3227 task->tk_action = NULL;
faf5f49c
TM		 3228 return;
3229 }
26e976a8 3230 calldata->timestamp = jiffies;
5138fde0 3231 rpc_call_start(task);
faf5f49c
TM		 3232}
3233
963d8fe5 3234static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3235 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3236 .rpc_call_done = nfs4_locku_done,
06f814a3 3237 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3238};
3239
a5d16a4d
TM		 3240static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3241 struct nfs_open_context *ctx,
3242 struct nfs4_lock_state *lsp,
3243 struct nfs_seqid *seqid)
3244{
3245 struct nfs4_unlockdata *data;
5138fde0
TM		 3246 struct rpc_message msg = {
3247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3248 .rpc_cred = ctx->cred,
3249 };
c970aa85
TM		 3250 struct rpc_task_setup task_setup_data = {
3251 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3252 .rpc_message = &msg,
c970aa85 3253 .callback_ops = &nfs4_locku_ops,
101070ca 3254 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3255 .flags = RPC_TASK_ASYNC,
3256 };
a5d16a4d 3257
137d6aca
FF		 3258 /* Ensure this is an unlock - when canceling a lock, the
3259 * canceled lock is passed in, and it won't be an unlock.
3260 */
3261 fl->fl_type = F_UNLCK;
3262
a5d16a4d
TM		 3263 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3264 if (data == NULL) {
3265 nfs_free_seqid(seqid);
3266 return ERR_PTR(-ENOMEM);
3267 }
3268
5138fde0
TM		 3269 msg.rpc_argp = &data->arg,
3270 msg.rpc_resp = &data->res,
c970aa85
TM		 3271 task_setup_data.callback_data = data;
3272 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3273}
3274
faf5f49c
TM		 3275static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3276{
911d1aaf 3277 struct nfs_seqid *seqid;
1da177e4 3278 struct nfs4_lock_state *lsp;
06f814a3
TM		 3279 struct rpc_task *task;
3280 int status = 0;
536ff0f8 3281 unsigned char fl_flags = request->fl_flags;
faf5f49c 3282
8d0a8a9d 3283 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3284 /* Unlock _before_ we do the RPC call */
3285 request->fl_flags |= FL_EXISTS;
3286 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3287 goto out;
8d0a8a9d 3288 if (status != 0)
9b073574
TM		 3289 goto out;
3290 /* Is this a delegated lock? */
3291 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3292 goto out;
8d0a8a9d 3293 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3294 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3295 status = -ENOMEM;
911d1aaf 3296 if (seqid == NULL)
9b073574 3297 goto out;
cd3758e3 3298 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3299 status = PTR_ERR(task);
3300 if (IS_ERR(task))
9b073574 3301 goto out;
a5d16a4d 3302 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3303 rpc_put_task(task);
9b073574 3304out:
536ff0f8 3305 request->fl_flags = fl_flags;
1da177e4
LT		 3306 return status;
3307}
3308
a5d16a4d
TM		 3309struct nfs4_lockdata {
3310 struct nfs_lock_args arg;
3311 struct nfs_lock_res res;
3312 struct nfs4_lock_state *lsp;
3313 struct nfs_open_context *ctx;
3314 struct file_lock fl;
26e976a8 3315 unsigned long timestamp;
a5d16a4d
TM		 3316 int rpc_status;
3317 int cancelled;
3318};
3319
3320static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3321 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3322{
a5d16a4d
TM		 3323 struct nfs4_lockdata *p;
3324 struct inode *inode = lsp->ls_state->inode;
1da177e4 3325 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3326
3327 p = kzalloc(sizeof(*p), GFP_KERNEL);
3328 if (p == NULL)
3329 return NULL;
3330
3331 p->arg.fh = NFS_FH(inode);
3332 p->arg.fl = &p->fl;
2f74c0a0
TM		 3333 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3334 if (p->arg.open_seqid == NULL)
3335 goto out_free;
a5d16a4d
TM		 3336 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3337 if (p->arg.lock_seqid == NULL)
2f74c0a0 3338 goto out_free_seqid;
a5d16a4d 3339 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3340 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3341 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3342 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d
TM		 3343 p->lsp = lsp;
3344 atomic_inc(&lsp->ls_count);
3345 p->ctx = get_nfs_open_context(ctx);
3346 memcpy(&p->fl, fl, sizeof(p->fl));
3347 return p;
2f74c0a0
TM		 3348out_free_seqid:
3349 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3350out_free:
3351 kfree(p);
3352 return NULL;
3353}
3354
3355static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3356{
3357 struct nfs4_lockdata *data = calldata;
3358 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3359
3110ff80 3360 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3361 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3362 return;
a5d16a4d
TM		 3363 /* Do we need to do an open_to_lock_owner? */
3364 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3365 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3366 return;
a5d16a4d
TM		 3367 data->arg.open_stateid = &state->stateid;
3368 data->arg.new_lock_owner = 1;
c1d51931 3369 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3370 } else
3371 data->arg.new_lock_owner = 0;
26e976a8 3372 data->timestamp = jiffies;
5138fde0 3373 rpc_call_start(task);
3110ff80 3374 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3375}
3376
3377static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3378{
3379 struct nfs4_lockdata *data = calldata;
3380
3110ff80 3381 dprintk("%s: begin!\n", __func__);
a5d16a4d
TM		 3382
3383 data->rpc_status = task->tk_status;
3384 if (RPC_ASSASSINATED(task))
3385 goto out;
3386 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3387 if (data->rpc_status == 0)
3388 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3389 else
3390 goto out;
3391 }
3392 if (data->rpc_status == 0) {
3393 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3394 sizeof(data->lsp->ls_stateid.data));
3395 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3396 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3397 }
a5d16a4d 3398out:
3110ff80 3399 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3400}
3401
3402static void nfs4_lock_release(void *calldata)
3403{
3404 struct nfs4_lockdata *data = calldata;
3405
3110ff80 3406 dprintk("%s: begin!\n", __func__);
2f74c0a0 3407 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3408 if (data->cancelled != 0) {
3409 struct rpc_task *task;
3410 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3411 data->arg.lock_seqid);
3412 if (!IS_ERR(task))
e6b3c4db 3413 rpc_put_task(task);
3110ff80 3414 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3415 } else
3416 nfs_free_seqid(data->arg.lock_seqid);
3417 nfs4_put_lock_state(data->lsp);
3418 put_nfs_open_context(data->ctx);
3419 kfree(data);
3110ff80 3420 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3421}
3422
3423static const struct rpc_call_ops nfs4_lock_ops = {
3424 .rpc_call_prepare = nfs4_lock_prepare,
3425 .rpc_call_done = nfs4_lock_done,
3426 .rpc_release = nfs4_lock_release,
3427};
3428
3429static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3430{
3431 struct nfs4_lockdata *data;
3432 struct rpc_task *task;
5138fde0
TM		 3433 struct rpc_message msg = {
3434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3435 .rpc_cred = state->owner->so_cred,
3436 };
c970aa85
TM		 3437 struct rpc_task_setup task_setup_data = {
3438 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3439 .rpc_message = &msg,
c970aa85 3440 .callback_ops = &nfs4_lock_ops,
101070ca 3441 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3442 .flags = RPC_TASK_ASYNC,
3443 };
a5d16a4d
TM		 3444 int ret;
3445
3110ff80 3446 dprintk("%s: begin!\n", __func__);
cd3758e3 3447 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3448 fl->fl_u.nfs4_fl.owner);
3449 if (data == NULL)
3450 return -ENOMEM;
3451 if (IS_SETLKW(cmd))
3452 data->arg.block = 1;
3453 if (reclaim != 0)
3454 data->arg.reclaim = 1;
5138fde0
TM		 3455 msg.rpc_argp = &data->arg,
3456 msg.rpc_resp = &data->res,
c970aa85
TM		 3457 task_setup_data.callback_data = data;
3458 task = rpc_run_task(&task_setup_data);
7a1218a2 3459 if (IS_ERR(task))
a5d16a4d 3460 return PTR_ERR(task);
a5d16a4d
TM		 3461 ret = nfs4_wait_for_completion_rpc_task(task);
3462 if (ret == 0) {
3463 ret = data->rpc_status;
3464 if (ret == -NFS4ERR_DENIED)
3465 ret = -EAGAIN;
3466 } else
3467 data->cancelled = 1;
e6b3c4db 3468 rpc_put_task(task);
3110ff80 3469 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3470 return ret;
1da177e4
LT		 3471}
3472
3473static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3474{
202b50dc
TM		 3475 struct nfs_server *server = NFS_SERVER(state->inode);
3476 struct nfs4_exception exception = { };
3477 int err;
3478
3479 do {
42a2d13e
TM		 3480 /* Cache the lock if possible... */
3481 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3482 return 0;
202b50dc
TM		 3483 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3484 if (err != -NFS4ERR_DELAY)
3485 break;
3486 nfs4_handle_exception(server, err, &exception);
3487 } while (exception.retry);
3488 return err;
1da177e4
LT		 3489}
3490
3491static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3492{
202b50dc
TM		 3493 struct nfs_server *server = NFS_SERVER(state->inode);
3494 struct nfs4_exception exception = { };
3495 int err;
3496
6bfc93ef
TM		 3497 err = nfs4_set_lock_state(state, request);
3498 if (err != 0)
3499 return err;
202b50dc 3500 do {
42a2d13e
TM		 3501 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3502 return 0;
202b50dc
TM		 3503 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3504 if (err != -NFS4ERR_DELAY)
3505 break;
3506 nfs4_handle_exception(server, err, &exception);
3507 } while (exception.retry);
3508 return err;
1da177e4
LT		 3509}
3510
3511static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3512{
adfa6f98 3513 struct nfs_client *clp = state->owner->so_client;
01c3b861 3514 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3515 int status;
3516
6bfc93ef 3517 /* Is this a delegated open? */
6bfc93ef
TM		 3518 status = nfs4_set_lock_state(state, request);
3519 if (status != 0)
3520 goto out;
01c3b861
TM		 3521 request->fl_flags |= FL_ACCESS;
3522 status = do_vfs_lock(request->fl_file, request);
3523 if (status < 0)
3524 goto out;
3525 down_read(&clp->cl_sem);
3526 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3527 struct nfs_inode *nfsi = NFS_I(state->inode);
3528 /* Yes: cache locks! */
3529 down_read(&nfsi->rwsem);
3530 /* ...but avoid races with delegation recall... */
3531 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3532 request->fl_flags = fl_flags & ~FL_SLEEP;
3533 status = do_vfs_lock(request->fl_file, request);
3534 up_read(&nfsi->rwsem);
3535 goto out_unlock;
3536 }
3537 up_read(&nfsi->rwsem);
3538 }
6bfc93ef
TM		 3539 status = _nfs4_do_setlk(state, cmd, request, 0);
3540 if (status != 0)
01c3b861 3541 goto out_unlock;
6bfc93ef 3542 /* Note: we always want to sleep here! */
01c3b861 3543 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 3544 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 3545 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 3546out_unlock:
1da177e4 3547 up_read(&clp->cl_sem);
01c3b861
TM		 3548out:
3549 request->fl_flags = fl_flags;
1da177e4
LT		 3550 return status;
3551}
3552
3553static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3554{
3555 struct nfs4_exception exception = { };
3556 int err;
3557
3558 do {
3559 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3560 _nfs4_proc_setlk(state, cmd, request),
3561 &exception);
3562 } while (exception.retry);
3563 return err;
3564}
3565
3566static int
3567nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3568{
3569 struct nfs_open_context *ctx;
3570 struct nfs4_state *state;
3571 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3572 int status;
3573
3574 /* verify open state */
cd3758e3 3575 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3576 state = ctx->state;
3577
3578 if (request->fl_start < 0 || request->fl_end < 0)
3579 return -EINVAL;
3580
3581 if (IS_GETLK(cmd))
3582 return nfs4_proc_getlk(state, F_GETLK, request);
3583
3584 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3585 return -EINVAL;
3586
3587 if (request->fl_type == F_UNLCK)
3588 return nfs4_proc_unlck(state, cmd, request);
3589
3590 do {
3591 status = nfs4_proc_setlk(state, cmd, request);
3592 if ((status != -EAGAIN) || IS_SETLK(cmd))
3593 break;
3594 timeout = nfs4_set_lock_task_retry(timeout);
3595 status = -ERESTARTSYS;
3596 if (signalled())
3597 break;
3598 } while(status < 0);
1da177e4
LT		 3599 return status;
3600}
3601
888e694c
TM		 3602int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3603{
3604 struct nfs_server *server = NFS_SERVER(state->inode);
3605 struct nfs4_exception exception = { };
3606 int err;
3607
3608 err = nfs4_set_lock_state(state, fl);
3609 if (err != 0)
3610 goto out;
3611 do {
3612 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3613 if (err != -NFS4ERR_DELAY)
3614 break;
3615 err = nfs4_handle_exception(server, err, &exception);
3616 } while (exception.retry);
3617out:
3618 return err;
3619}
6b3b5496 3620
aa1870af
BF		 3621#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3622
6b3b5496
BF		 3623int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3624 size_t buflen, int flags)
3625{
4b580ee3
BF		 3626 struct inode *inode = dentry->d_inode;
3627
3628 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3629 return -EOPNOTSUPP;
3630
4b580ee3 3631 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3632}
3633
3634/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3635 * and that's what we'll do for e.g. user attributes that haven't been set.
3636 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3637 * attributes in kernel-managed attribute namespaces. */
3638ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3639 size_t buflen)
3640{
aa1870af
BF		 3641 struct inode *inode = dentry->d_inode;
3642
3643 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3644 return -EOPNOTSUPP;
3645
3646 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3647}
3648
3649ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3650{
aa1870af 3651 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3652
096455a2
BF		 3653 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3654 return 0;
6b3b5496
BF		 3655 if (buf && buflen < len)
3656 return -ERANGE;
3657 if (buf)
aa1870af
BF		 3658 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3659 return len;
6b3b5496
BF		 3660}
3661
56659e99 3662int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3663 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3664{
3665 struct nfs_server *server = NFS_SERVER(dir);
3666 u32 bitmask[2] = {
361e624f
MN		 3667 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3668 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3669 };
3670 struct nfs4_fs_locations_arg args = {
3671 .dir_fh = NFS_FH(dir),
c228fd3a 3672 .name = name,
683b57b4
TM		 3673 .page = page,
3674 .bitmask = bitmask,
3675 };
3676 struct rpc_message msg = {
3677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3678 .rpc_argp = &args,
7aaa0b3b 3679 .rpc_resp = fs_locations,
683b57b4
TM		 3680 };
3681 int status;
3682
3110ff80 3683 dprintk("%s: start\n", __func__);
c228fd3a 3684 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3685 fs_locations->server = server;
830b8e33 3686 fs_locations->nlocations = 0;
683b57b4 3687 status = rpc_call_sync(server->client, &msg, 0);
3110ff80 3688 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 3689 return status;
3690}
3691
1da177e4 3692struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
b79a4a1b 3693 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 3694 .recover_open = nfs4_open_reclaim,
3695 .recover_lock = nfs4_lock_reclaim,
3696};
3697
b79a4a1b
TM		 3698struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
3699 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 3700 .recover_open = nfs4_open_expired,
3701 .recover_lock = nfs4_lock_expired,
3702};
3703
92e1d5be 3704static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3705 .permission = nfs_permission,
3706 .getattr = nfs_getattr,
3707 .setattr = nfs_setattr,
3708 .getxattr = nfs4_getxattr,
3709 .setxattr = nfs4_setxattr,
3710 .listxattr = nfs4_listxattr,
3711};
3712
509de811 3713const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3714 .version = 4, /* protocol version */
3715 .dentry_ops = &nfs4_dentry_operations,
3716 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3717 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3718 .getroot = nfs4_proc_get_root,
3719 .getattr = nfs4_proc_getattr,
3720 .setattr = nfs4_proc_setattr,
2b3de441 3721 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3722 .lookup = nfs4_proc_lookup,
3723 .access = nfs4_proc_access,
3724 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3725 .create = nfs4_proc_create,
3726 .remove = nfs4_proc_remove,
3727 .unlink_setup = nfs4_proc_unlink_setup,
3728 .unlink_done = nfs4_proc_unlink_done,
3729 .rename = nfs4_proc_rename,
3730 .link = nfs4_proc_link,
3731 .symlink = nfs4_proc_symlink,
3732 .mkdir = nfs4_proc_mkdir,
3733 .rmdir = nfs4_proc_remove,
3734 .readdir = nfs4_proc_readdir,
3735 .mknod = nfs4_proc_mknod,
3736 .statfs = nfs4_proc_statfs,
3737 .fsinfo = nfs4_proc_fsinfo,
3738 .pathconf = nfs4_proc_pathconf,
e9326dca 3739 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3740 .decode_dirent = nfs4_decode_dirent,
3741 .read_setup = nfs4_proc_read_setup,
ec06c096 3742 .read_done = nfs4_read_done,
1da177e4 3743 .write_setup = nfs4_proc_write_setup,
788e7a89 3744 .write_done = nfs4_write_done,
1da177e4 3745 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3746 .commit_done = nfs4_commit_done,
1da177e4 3747 .lock = nfs4_proc_lock,
e50a1c2e 3748 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3749};
3750
3751/*
3752 * Local variables:
3753 * c-basic-offset: 8
3754 * End:
3755 */
Linux 6.x block layer and io_uring tree(s)