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NFSv4: Callers to nfs4_get_renew_cred() need to hold nfs_client->cl_lock
[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;
987 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
988 break;
58d9714a 989 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 990 }
991 return 0;
58d9714a
TM		 992}
993
1da177e4
LT		 994/*
995 * OPEN_EXPIRED:
996 * reclaim state on the server after a network partition.
997 * Assumes caller holds the appropriate lock
998 */
539cd03a 999static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1000{
e56e0b78 1001 struct nfs4_opendata *opendata;
864472e9 1002 int ret;
1da177e4 1003
6f220ed5
TM		 1004 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1005 if (IS_ERR(opendata))
1006 return PTR_ERR(opendata);
864472e9 1007 ret = nfs4_open_recover(opendata, state);
35d05778 1008 if (ret == -ESTALE)
539cd03a 1009 d_drop(ctx->path.dentry);
c6d00e63 1010 nfs4_opendata_put(opendata);
864472e9 1011 return ret;
1da177e4
LT		 1012}
1013
539cd03a 1014static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1015{
539cd03a 1016 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1017 struct nfs4_exception exception = { };
1018 int err;
1019
1020 do {
539cd03a 1021 err = _nfs4_open_expired(ctx, state);
202b50dc
TM		 1022 if (err == -NFS4ERR_DELAY)
1023 nfs4_handle_exception(server, err, &exception);
1024 } while (exception.retry);
1025 return err;
1026}
1027
1da177e4
LT		 1028static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1029{
1da177e4 1030 struct nfs_open_context *ctx;
864472e9 1031 int ret;
1da177e4 1032
864472e9
TM		 1033 ctx = nfs4_state_find_open_context(state);
1034 if (IS_ERR(ctx))
1035 return PTR_ERR(ctx);
539cd03a 1036 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1037 put_nfs_open_context(ctx);
1038 return ret;
1da177e4
LT		 1039}
1040
aa53ed54
JL		 1041/*
1042 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1043 * fields corresponding to attributes that were used to store the verifier.
1044 * Make sure we clobber those fields in the later setattr call
1045 */
1046static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1047{
1048 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1049 !(sattr->ia_valid & ATTR_ATIME_SET))
1050 sattr->ia_valid |= ATTR_ATIME;
1051
1052 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1053 !(sattr->ia_valid & ATTR_MTIME_SET))
1054 sattr->ia_valid |= ATTR_MTIME;
1055}
1056
1da177e4 1057/*
24ac23ab 1058 * Returns a referenced nfs4_state
1da177e4 1059 */
ad389da7 1060static 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		 1061{
1062 struct nfs4_state_owner *sp;
1063 struct nfs4_state *state = NULL;
1064 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 1065 struct nfs_client *clp = server->nfs_client;
e56e0b78 1066 struct nfs4_opendata *opendata;
aac00a8d 1067 int status;
1da177e4
LT		 1068
1069 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1070 status = -ENOMEM;
1071 if (!(sp = nfs4_get_state_owner(server, cred))) {
1072 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1073 goto out_err;
1074 }
58d9714a
TM		 1075 status = nfs4_recover_expired_lease(server);
1076 if (status != 0)
b4454fe1 1077 goto err_put_state_owner;
aac00a8d
TM		 1078 if (path->dentry->d_inode != NULL)
1079 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
58d9714a
TM		 1080 down_read(&clp->cl_sem);
1081 status = -ENOMEM;
ad389da7 1082 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
e56e0b78 1083 if (opendata == NULL)
76723de0 1084 goto err_release_rwsem;
1da177e4 1085
aac00a8d
TM		 1086 if (path->dentry->d_inode != NULL)
1087 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1088
24ac23ab 1089 status = _nfs4_proc_open(opendata);
1da177e4 1090 if (status != 0)
c6d00e63 1091 goto err_opendata_put;
1da177e4 1092
aa53ed54
JL		 1093 if (opendata->o_arg.open_flags & O_EXCL)
1094 nfs4_exclusive_attrset(opendata, sattr);
1095
24ac23ab 1096 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1097 status = PTR_ERR(state);
1098 if (IS_ERR(state))
c6d00e63 1099 goto err_opendata_put;
c6d00e63 1100 nfs4_opendata_put(opendata);
1da177e4
LT		 1101 nfs4_put_state_owner(sp);
1102 up_read(&clp->cl_sem);
1103 *res = state;
1104 return 0;
c6d00e63
TM		 1105err_opendata_put:
1106 nfs4_opendata_put(opendata);
76723de0
TM		 1107err_release_rwsem:
1108 up_read(&clp->cl_sem);
e56e0b78
TM		 1109err_put_state_owner:
1110 nfs4_put_state_owner(sp);
1da177e4 1111out_err:
1da177e4
LT		 1112 *res = NULL;
1113 return status;
1114}
1115
1116
ad389da7 1117static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1118{
1119 struct nfs4_exception exception = { };
1120 struct nfs4_state *res;
1121 int status;
1122
1123 do {
ad389da7 1124 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1da177e4
LT		 1125 if (status == 0)
1126 break;
1127 /* NOTE: BAD_SEQID means the server and client disagree about the
1128 * book-keeping w.r.t. state-changing operations
1129 * (OPEN/CLOSE/LOCK/LOCKU...)
1130 * It is actually a sign of a bug on the client or on the server.
1131 *
1132 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1133 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1134 * have unhashed the old state_owner for us, and that we can
1135 * therefore safely retry using a new one. We should still warn
1136 * the user though...
1137 */
1138 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1139 printk(KERN_WARNING "NFS: v4 server %s "
1140 " returned a bad sequence-id error!\n",
1141 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1142 exception.retry = 1;
1143 continue;
1144 }
550f5747
TM		 1145 /*
1146 * BAD_STATEID on OPEN means that the server cancelled our
1147 * state before it received the OPEN_CONFIRM.
1148 * Recover by retrying the request as per the discussion
1149 * on Page 181 of RFC3530.
1150 */
1151 if (status == -NFS4ERR_BAD_STATEID) {
1152 exception.retry = 1;
1153 continue;
1154 }
aac00a8d
TM		 1155 if (status == -EAGAIN) {
1156 /* We must have found a delegation */
1157 exception.retry = 1;
1158 continue;
1159 }
1da177e4
LT		 1160 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1161 status, &exception));
1162 } while (exception.retry);
1163 return res;
1164}
1165
659bfcd6
TM		 1166static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1167 struct nfs_fattr *fattr, struct iattr *sattr,
1168 struct nfs4_state *state)
1da177e4 1169{
3e4f6290 1170 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1171 struct nfs_setattrargs arg = {
3e4f6290 1172 .fh = NFS_FH(inode),
1da177e4
LT		 1173 .iap = sattr,
1174 .server = server,
1175 .bitmask = server->attr_bitmask,
1176 };
1177 struct nfs_setattrres res = {
1178 .fattr = fattr,
1179 .server = server,
1180 };
1181 struct rpc_message msg = {
659bfcd6
TM		 1182 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1183 .rpc_argp = &arg,
1184 .rpc_resp = &res,
1185 .rpc_cred = cred,
1da177e4 1186 };
26e976a8 1187 unsigned long timestamp = jiffies;
65e4308d 1188 int status;
1da177e4 1189
0e574af1 1190 nfs_fattr_init(fattr);
1da177e4 1191
3e4f6290
TM		 1192 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1193 /* Use that stateid */
1194 } else if (state != NULL) {
08e9eac4
TM		 1195 nfs4_copy_stateid(&arg.stateid, state, current->files);
1196 } else
1da177e4
LT		 1197 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1198
65e4308d 1199 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1200 if (status == 0 && state != NULL)
1201 renew_lease(server, timestamp);
65e4308d 1202 return status;
1da177e4
LT		 1203}
1204
659bfcd6
TM		 1205static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1206 struct nfs_fattr *fattr, struct iattr *sattr,
1207 struct nfs4_state *state)
1da177e4 1208{
3e4f6290 1209 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1210 struct nfs4_exception exception = { };
1211 int err;
1212 do {
1213 err = nfs4_handle_exception(server,
659bfcd6 1214 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1215 &exception);
1216 } while (exception.retry);
1217 return err;
1218}
1219
1220struct nfs4_closedata {
4a35bd41 1221 struct path path;
1da177e4
LT		 1222 struct inode *inode;
1223 struct nfs4_state *state;
1224 struct nfs_closeargs arg;
1225 struct nfs_closeres res;
516a6af6 1226 struct nfs_fattr fattr;
26e976a8 1227 unsigned long timestamp;
1da177e4
LT		 1228};
1229
963d8fe5 1230static void nfs4_free_closedata(void *data)
9512135d 1231{
963d8fe5
TM		 1232 struct nfs4_closedata *calldata = data;
1233 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1234
1235 nfs4_put_open_state(calldata->state);
1236 nfs_free_seqid(calldata->arg.seqid);
9512135d 1237 nfs4_put_state_owner(sp);
31f31db1 1238 path_put(&calldata->path);
9512135d
TM		 1239 kfree(calldata);
1240}
1241
963d8fe5 1242static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1243{
963d8fe5 1244 struct nfs4_closedata *calldata = data;
1da177e4 1245 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1246 struct nfs_server *server = NFS_SERVER(calldata->inode);
1247
4ce70ada
TM		 1248 if (RPC_ASSASSINATED(task))
1249 return;
1da177e4
LT		 1250 /* hmm. we are done with the inode, and in the process of freeing
1251 * the state_owner. we keep this around to process errors
1252 */
1da177e4
LT		 1253 switch (task->tk_status) {
1254 case 0:
45328c35 1255 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1256 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1257 break;
1258 case -NFS4ERR_STALE_STATEID:
1259 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1260 break;
1261 default:
1262 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1263 rpc_restart_call(task);
1264 return;
1265 }
1266 }
516a6af6 1267 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1268}
1269
4ce70ada 1270static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1271{
4ce70ada 1272 struct nfs4_closedata *calldata = data;
9512135d 1273 struct nfs4_state *state = calldata->state;
003707c7 1274 int clear_rd, clear_wr, clear_rdwr;
9512135d 1275
963d8fe5 1276 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1277 return;
003707c7 1278
003707c7 1279 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1280 spin_lock(&state->owner->so_lock);
003707c7 1281 /* Calculate the change in open mode */
e7616923 1282 if (state->n_rdwr == 0) {
003707c7 1283 if (state->n_rdonly == 0) {
003707c7
TM		 1284 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1285 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1286 }
1287 if (state->n_wronly == 0) {
003707c7
TM		 1288 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1289 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1290 }
e7616923 1291 }
4cecb76f 1292 spin_unlock(&state->owner->so_lock);
003707c7 1293 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1294 /* Note: exit _without_ calling nfs4_close_done */
1295 task->tk_action = NULL;
9512135d
TM		 1296 return;
1297 }
516a6af6 1298 nfs_fattr_init(calldata->res.fattr);
45328c35 1299 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1300 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1301 calldata->arg.open_flags = FMODE_READ;
1302 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1303 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1304 calldata->arg.open_flags = FMODE_WRITE;
1305 }
26e976a8 1306 calldata->timestamp = jiffies;
5138fde0 1307 rpc_call_start(task);
1da177e4
LT		 1308}
1309
963d8fe5 1310static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1311 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1312 .rpc_call_done = nfs4_close_done,
1313 .rpc_release = nfs4_free_closedata,
1314};
1315
1da177e4
LT		 1316/*
1317 * It is possible for data to be read/written from a mem-mapped file
1318 * after the sys_close call (which hits the vfs layer as a flush).
1319 * This means that we can't safely call nfsv4 close on a file until
1320 * the inode is cleared. This in turn means that we are not good
1321 * NFSv4 citizens - we do not indicate to the server to update the file's
1322 * share state even when we are done with one of the three share
1323 * stateid's in the inode.
1324 *
1325 * NOTE: Caller must be holding the sp->so_owner semaphore!
1326 */
a49c3c77 1327int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1328{
4a35bd41 1329 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1330 struct nfs4_closedata *calldata;
b39e625b
TM		 1331 struct nfs4_state_owner *sp = state->owner;
1332 struct rpc_task *task;
5138fde0
TM		 1333 struct rpc_message msg = {
1334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1335 .rpc_cred = state->owner->so_cred,
1336 };
c970aa85
TM		 1337 struct rpc_task_setup task_setup_data = {
1338 .rpc_client = server->client,
5138fde0 1339 .rpc_message = &msg,
c970aa85 1340 .callback_ops = &nfs4_close_ops,
101070ca 1341 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1342 .flags = RPC_TASK_ASYNC,
1343 };
9512135d 1344 int status = -ENOMEM;
1da177e4 1345
9512135d 1346 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1347 if (calldata == NULL)
9512135d 1348 goto out;
4a35bd41 1349 calldata->inode = state->inode;
1da177e4 1350 calldata->state = state;
4a35bd41 1351 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1352 calldata->arg.stateid = &state->open_stateid;
1da177e4 1353 /* Serialization for the sequence id */
cee54fc9 1354 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1355 if (calldata->arg.seqid == NULL)
1356 goto out_free_calldata;
516a6af6
TM		 1357 calldata->arg.bitmask = server->attr_bitmask;
1358 calldata->res.fattr = &calldata->fattr;
c1d51931 1359 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1360 calldata->res.server = server;
4a35bd41
TM		 1361 calldata->path.mnt = mntget(path->mnt);
1362 calldata->path.dentry = dget(path->dentry);
9512135d 1363
5138fde0
TM		 1364 msg.rpc_argp = &calldata->arg,
1365 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1366 task_setup_data.callback_data = calldata;
1367 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1368 if (IS_ERR(task))
1369 return PTR_ERR(task);
a49c3c77
TM		 1370 status = 0;
1371 if (wait)
1372 status = rpc_wait_for_completion_task(task);
b39e625b 1373 rpc_put_task(task);
a49c3c77 1374 return status;
9512135d
TM		 1375out_free_calldata:
1376 kfree(calldata);
1377out:
b39e625b
TM		 1378 nfs4_put_open_state(state);
1379 nfs4_put_state_owner(sp);
9512135d 1380 return status;
1da177e4
LT		 1381}
1382
4a35bd41 1383static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM		 1384{
1385 struct file *filp;
1b45c46c 1386 int ret;
02a913a7 1387
1b45c46c
TM		 1388 /* If the open_intent is for execute, we have an extra check to make */
1389 if (nd->intent.open.flags & FMODE_EXEC) {
af22f94a 1390 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1391 state->owner->so_cred,
1392 nd->intent.open.flags);
1393 if (ret < 0)
1394 goto out_close;
1395 }
4a35bd41 1396 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1397 if (!IS_ERR(filp)) {
1398 struct nfs_open_context *ctx;
cd3758e3 1399 ctx = nfs_file_open_context(filp);
02a913a7 1400 ctx->state = state;
95cf959b
TM		 1401 return 0;
1402 }
1b45c46c
TM		 1403 ret = PTR_ERR(filp);
1404out_close:
a49c3c77 1405 nfs4_close_sync(path, state, nd->intent.open.flags);
1b45c46c 1406 return ret;
02a913a7
TM		 1407}
1408
1409struct dentry *
1da177e4
LT		 1410nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1411{
ad389da7 1412 struct path path = {
4ac91378 1413 .mnt = nd->path.mnt,
ad389da7
TM		 1414 .dentry = dentry,
1415 };
4ac91378 1416 struct dentry *parent;
1da177e4
LT		 1417 struct iattr attr;
1418 struct rpc_cred *cred;
1419 struct nfs4_state *state;
02a913a7 1420 struct dentry *res;
1da177e4
LT		 1421
1422 if (nd->flags & LOOKUP_CREATE) {
1423 attr.ia_mode = nd->intent.open.create_mode;
1424 attr.ia_valid = ATTR_MODE;
1425 if (!IS_POSIXACL(dir))
1426 attr.ia_mode &= ~current->fs->umask;
1427 } else {
1428 attr.ia_valid = 0;
1429 BUG_ON(nd->intent.open.flags & O_CREAT);
1430 }
1431
98a8e323 1432 cred = rpc_lookup_cred();
1da177e4 1433 if (IS_ERR(cred))
02a913a7 1434 return (struct dentry *)cred;
565277f6
TM		 1435 parent = dentry->d_parent;
1436 /* Protect against concurrent sillydeletes */
1437 nfs_block_sillyrename(parent);
ad389da7 1438 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1439 put_rpccred(cred);
02a913a7 1440 if (IS_ERR(state)) {
d75340cc 1441 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1442 d_add(dentry, NULL);
d75340cc
TM		 1443 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1444 }
565277f6 1445 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1446 return (struct dentry *)state;
1447 }
24ac23ab 1448 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1449 if (res != NULL)
deee9369 1450 path.dentry = res;
d75340cc 1451 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1452 nfs_unblock_sillyrename(parent);
4a35bd41 1453 nfs4_intent_set_file(nd, &path, state);
02a913a7 1454 return res;
1da177e4
LT		 1455}
1456
1457int
02a913a7 1458nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1459{
ad389da7 1460 struct path path = {
4ac91378 1461 .mnt = nd->path.mnt,
ad389da7
TM		 1462 .dentry = dentry,
1463 };
1da177e4
LT		 1464 struct rpc_cred *cred;
1465 struct nfs4_state *state;
1da177e4 1466
98a8e323 1467 cred = rpc_lookup_cred();
1da177e4
LT		 1468 if (IS_ERR(cred))
1469 return PTR_ERR(cred);
aac00a8d 1470 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1471 put_rpccred(cred);
02a913a7
TM		 1472 if (IS_ERR(state)) {
1473 switch (PTR_ERR(state)) {
1474 case -EPERM:
1475 case -EACCES:
1476 case -EDQUOT:
1477 case -ENOSPC:
1478 case -EROFS:
1479 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1480 return 1;
b87c0adf
CL		 1481 default:
1482 goto out_drop;
02a913a7 1483 }
02a913a7 1484 }
24ac23ab 1485 if (state->inode == dentry->d_inode) {
d75340cc 1486 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
4a35bd41 1487 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1488 return 1;
1489 }
a49c3c77 1490 nfs4_close_sync(&path, state, openflags);
02a913a7
TM		 1491out_drop:
1492 d_drop(dentry);
1da177e4
LT		 1493 return 0;
1494}
1495
1496
1497static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1498{
1499 struct nfs4_server_caps_res res = {};
1500 struct rpc_message msg = {
1501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1502 .rpc_argp = fhandle,
1503 .rpc_resp = &res,
1504 };
1505 int status;
1506
1507 status = rpc_call_sync(server->client, &msg, 0);
1508 if (status == 0) {
1509 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1510 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1511 server->caps |= NFS_CAP_ACLS;
1512 if (res.has_links != 0)
1513 server->caps |= NFS_CAP_HARDLINKS;
1514 if (res.has_symlinks != 0)
1515 server->caps |= NFS_CAP_SYMLINKS;
1516 server->acl_bitmask = res.acl_bitmask;
1517 }
1518 return status;
1519}
1520
55a97593 1521int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1522{
1523 struct nfs4_exception exception = { };
1524 int err;
1525 do {
1526 err = nfs4_handle_exception(server,
1527 _nfs4_server_capabilities(server, fhandle),
1528 &exception);
1529 } while (exception.retry);
1530 return err;
1531}
1532
1533static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1534 struct nfs_fsinfo *info)
1535{
1da177e4
LT		 1536 struct nfs4_lookup_root_arg args = {
1537 .bitmask = nfs4_fattr_bitmap,
1538 };
1539 struct nfs4_lookup_res res = {
1540 .server = server,
0e574af1 1541 .fattr = info->fattr,
1da177e4
LT		 1542 .fh = fhandle,
1543 };
1544 struct rpc_message msg = {
1545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1546 .rpc_argp = &args,
1547 .rpc_resp = &res,
1548 };
0e574af1 1549 nfs_fattr_init(info->fattr);
1da177e4
LT		 1550 return rpc_call_sync(server->client, &msg, 0);
1551}
1552
1553static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1554 struct nfs_fsinfo *info)
1555{
1556 struct nfs4_exception exception = { };
1557 int err;
1558 do {
1559 err = nfs4_handle_exception(server,
1560 _nfs4_lookup_root(server, fhandle, info),
1561 &exception);
1562 } while (exception.retry);
1563 return err;
1564}
1565
54ceac45
DH		 1566/*
1567 * get the file handle for the "/" directory on the server
1568 */
1da177e4 1569static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1570 struct nfs_fsinfo *info)
1da177e4 1571{
1da177e4
LT		 1572 int status;
1573
1da177e4 1574 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1575 if (status == 0)
1576 status = nfs4_server_capabilities(server, fhandle);
1577 if (status == 0)
1578 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1579 return nfs4_map_errors(status);
1da177e4
LT		 1580}
1581
6b97fd3d
MN		 1582/*
1583 * Get locations and (maybe) other attributes of a referral.
1584 * Note that we'll actually follow the referral later when
1585 * we detect fsid mismatch in inode revalidation
1586 */
56659e99 1587static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1588{
1589 int status = -ENOMEM;
1590 struct page *page = NULL;
1591 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1592
1593 page = alloc_page(GFP_KERNEL);
1594 if (page == NULL)
1595 goto out;
1596 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1597 if (locations == NULL)
1598 goto out;
1599
c228fd3a 1600 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1601 if (status != 0)
1602 goto out;
1603 /* Make sure server returned a different fsid for the referral */
1604 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 1605 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 1606 status = -EIO;
1607 goto out;
1608 }
1609
1610 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1611 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1612 if (!fattr->mode)
1613 fattr->mode = S_IFDIR;
1614 memset(fhandle, 0, sizeof(struct nfs_fh));
1615out:
1616 if (page)
1617 __free_page(page);
1618 if (locations)
1619 kfree(locations);
1620 return status;
1621}
1622
1da177e4
LT		 1623static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1624{
1625 struct nfs4_getattr_arg args = {
1626 .fh = fhandle,
1627 .bitmask = server->attr_bitmask,
1628 };
1629 struct nfs4_getattr_res res = {
1630 .fattr = fattr,
1631 .server = server,
1632 };
1633 struct rpc_message msg = {
1634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1635 .rpc_argp = &args,
1636 .rpc_resp = &res,
1637 };
1638
0e574af1 1639 nfs_fattr_init(fattr);
1da177e4
LT		 1640 return rpc_call_sync(server->client, &msg, 0);
1641}
1642
1643static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1644{
1645 struct nfs4_exception exception = { };
1646 int err;
1647 do {
1648 err = nfs4_handle_exception(server,
1649 _nfs4_proc_getattr(server, fhandle, fattr),
1650 &exception);
1651 } while (exception.retry);
1652 return err;
1653}
1654
1655/*
1656 * The file is not closed if it is opened due to the a request to change
1657 * the size of the file. The open call will not be needed once the
1658 * VFS layer lookup-intents are implemented.
1659 *
1660 * Close is called when the inode is destroyed.
1661 * If we haven't opened the file for O_WRONLY, we
1662 * need to in the size_change case to obtain a stateid.
1663 *
1664 * Got race?
1665 * Because OPEN is always done by name in nfsv4, it is
1666 * possible that we opened a different file by the same
1667 * name. We can recognize this race condition, but we
1668 * can't do anything about it besides returning an error.
1669 *
1670 * This will be fixed with VFS changes (lookup-intent).
1671 */
1672static int
1673nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1674 struct iattr *sattr)
1675{
08e9eac4 1676 struct inode *inode = dentry->d_inode;
659bfcd6 1677 struct rpc_cred *cred = NULL;
d530838b 1678 struct nfs4_state *state = NULL;
1da177e4
LT		 1679 int status;
1680
0e574af1 1681 nfs_fattr_init(fattr);
1da177e4 1682
d530838b 1683 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 1684 if (sattr->ia_valid & ATTR_FILE) {
1685 struct nfs_open_context *ctx;
1686
1687 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 1688 if (ctx) {
1689 cred = ctx->cred;
1690 state = ctx->state;
1691 }
659bfcd6 1692 }
08e9eac4 1693
659bfcd6 1694 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 1695 if (status == 0)
1696 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 1697 return status;
1698}
1699
56659e99
TM		 1700static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1701 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1702 struct nfs_fattr *fattr)
1703{
1704 int status;
1705 struct nfs4_lookup_arg args = {
1706 .bitmask = server->attr_bitmask,
1707 .dir_fh = dirfh,
1708 .name = name,
1709 };
1710 struct nfs4_lookup_res res = {
1711 .server = server,
1712 .fattr = fattr,
1713 .fh = fhandle,
1714 };
1715 struct rpc_message msg = {
1716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1717 .rpc_argp = &args,
1718 .rpc_resp = &res,
1719 };
1720
1721 nfs_fattr_init(fattr);
1722
1723 dprintk("NFS call lookupfh %s\n", name->name);
1724 status = rpc_call_sync(server->client, &msg, 0);
1725 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1726 return status;
1727}
1728
1729static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1730 struct qstr *name, struct nfs_fh *fhandle,
1731 struct nfs_fattr *fattr)
1732{
1733 struct nfs4_exception exception = { };
1734 int err;
1735 do {
4e56e082
TM		 1736 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1737 /* FIXME: !!!! */
1738 if (err == -NFS4ERR_MOVED) {
1739 err = -EREMOTE;
1740 break;
1741 }
1742 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1743 } while (exception.retry);
1744 return err;
1745}
1746
56659e99 1747static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1748 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1749{
4e56e082 1750 int status;
1da177e4
LT		 1751
1752 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1753 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1754 if (status == -NFS4ERR_MOVED)
1755 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1756 dprintk("NFS reply lookup: %d\n", status);
1757 return status;
1758}
1759
1760static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1761{
1762 struct nfs4_exception exception = { };
1763 int err;
1764 do {
1765 err = nfs4_handle_exception(NFS_SERVER(dir),
1766 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1767 &exception);
1768 } while (exception.retry);
1769 return err;
1770}
1771
1772static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1773{
76b32999
TM		 1774 struct nfs_server *server = NFS_SERVER(inode);
1775 struct nfs_fattr fattr;
1da177e4
LT		 1776 struct nfs4_accessargs args = {
1777 .fh = NFS_FH(inode),
76b32999
TM		 1778 .bitmask = server->attr_bitmask,
1779 };
1780 struct nfs4_accessres res = {
1781 .server = server,
1782 .fattr = &fattr,
1da177e4 1783 };
1da177e4
LT		 1784 struct rpc_message msg = {
1785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1786 .rpc_argp = &args,
1787 .rpc_resp = &res,
1788 .rpc_cred = entry->cred,
1789 };
1790 int mode = entry->mask;
1791 int status;
1792
1793 /*
1794 * Determine which access bits we want to ask for...
1795 */
1796 if (mode & MAY_READ)
1797 args.access |= NFS4_ACCESS_READ;
1798 if (S_ISDIR(inode->i_mode)) {
1799 if (mode & MAY_WRITE)
1800 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1801 if (mode & MAY_EXEC)
1802 args.access |= NFS4_ACCESS_LOOKUP;
1803 } else {
1804 if (mode & MAY_WRITE)
1805 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1806 if (mode & MAY_EXEC)
1807 args.access |= NFS4_ACCESS_EXECUTE;
1808 }
76b32999 1809 nfs_fattr_init(&fattr);
1da177e4
LT		 1810 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1811 if (!status) {
1812 entry->mask = 0;
1813 if (res.access & NFS4_ACCESS_READ)
1814 entry->mask |= MAY_READ;
1815 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1816 entry->mask |= MAY_WRITE;
1817 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1818 entry->mask |= MAY_EXEC;
76b32999 1819 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1820 }
1821 return status;
1822}
1823
1824static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1825{
1826 struct nfs4_exception exception = { };
1827 int err;
1828 do {
1829 err = nfs4_handle_exception(NFS_SERVER(inode),
1830 _nfs4_proc_access(inode, entry),
1831 &exception);
1832 } while (exception.retry);
1833 return err;
1834}
1835
1836/*
1837 * TODO: For the time being, we don't try to get any attributes
1838 * along with any of the zero-copy operations READ, READDIR,
1839 * READLINK, WRITE.
1840 *
1841 * In the case of the first three, we want to put the GETATTR
1842 * after the read-type operation -- this is because it is hard
1843 * to predict the length of a GETATTR response in v4, and thus
1844 * align the READ data correctly. This means that the GETATTR
1845 * may end up partially falling into the page cache, and we should
1846 * shift it into the 'tail' of the xdr_buf before processing.
1847 * To do this efficiently, we need to know the total length
1848 * of data received, which doesn't seem to be available outside
1849 * of the RPC layer.
1850 *
1851 * In the case of WRITE, we also want to put the GETATTR after
1852 * the operation -- in this case because we want to make sure
1853 * we get the post-operation mtime and size. This means that
1854 * we can't use xdr_encode_pages() as written: we need a variant
1855 * of it which would leave room in the 'tail' iovec.
1856 *
1857 * Both of these changes to the XDR layer would in fact be quite
1858 * minor, but I decided to leave them for a subsequent patch.
1859 */
1860static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1861 unsigned int pgbase, unsigned int pglen)
1862{
1863 struct nfs4_readlink args = {
1864 .fh = NFS_FH(inode),
1865 .pgbase = pgbase,
1866 .pglen = pglen,
1867 .pages = &page,
1868 };
1869 struct rpc_message msg = {
1870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1871 .rpc_argp = &args,
1872 .rpc_resp = NULL,
1873 };
1874
1875 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1876}
1877
1878static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1879 unsigned int pgbase, unsigned int pglen)
1880{
1881 struct nfs4_exception exception = { };
1882 int err;
1883 do {
1884 err = nfs4_handle_exception(NFS_SERVER(inode),
1885 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1886 &exception);
1887 } while (exception.retry);
1888 return err;
1889}
1890
1da177e4
LT		 1891/*
1892 * Got race?
1893 * We will need to arrange for the VFS layer to provide an atomic open.
1894 * Until then, this create/open method is prone to inefficiency and race
1895 * conditions due to the lookup, create, and open VFS calls from sys_open()
1896 * placed on the wire.
1897 *
1898 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1899 * The file will be opened again in the subsequent VFS open call
1900 * (nfs4_proc_file_open).
1901 *
1902 * The open for read will just hang around to be used by any process that
1903 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1904 */
1905
1906static int
1907nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1908 int flags, struct nameidata *nd)
1da177e4 1909{
ad389da7 1910 struct path path = {
4ac91378 1911 .mnt = nd->path.mnt,
ad389da7
TM		 1912 .dentry = dentry,
1913 };
1da177e4
LT		 1914 struct nfs4_state *state;
1915 struct rpc_cred *cred;
1916 int status = 0;
1917
98a8e323 1918 cred = rpc_lookup_cred();
1da177e4
LT		 1919 if (IS_ERR(cred)) {
1920 status = PTR_ERR(cred);
1921 goto out;
1922 }
ad389da7 1923 state = nfs4_do_open(dir, &path, flags, sattr, cred);
d4d9cdcb 1924 d_drop(dentry);
1da177e4
LT		 1925 if (IS_ERR(state)) {
1926 status = PTR_ERR(state);
659bfcd6 1927 goto out_putcred;
1da177e4 1928 }
d4d9cdcb 1929 d_add(dentry, igrab(state->inode));
d75340cc 1930 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 1931 if (flags & O_EXCL) {
1932 struct nfs_fattr fattr;
659bfcd6 1933 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 1934 if (status == 0)
65e4308d 1935 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 1936 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 1937 }
ad389da7 1938 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
4a35bd41 1939 status = nfs4_intent_set_file(nd, &path, state);
02a913a7 1940 else
a49c3c77 1941 nfs4_close_sync(&path, state, flags);
659bfcd6
TM		 1942out_putcred:
1943 put_rpccred(cred);
1da177e4
LT		 1944out:
1945 return status;
1946}
1947
1948static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1949{
16e42959 1950 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 1951 struct nfs_removeargs args = {
1da177e4 1952 .fh = NFS_FH(dir),
4fdc17b2
TM		 1953 .name.len = name->len,
1954 .name.name = name->name,
16e42959
TM		 1955 .bitmask = server->attr_bitmask,
1956 };
4fdc17b2 1957 struct nfs_removeres res = {
16e42959 1958 .server = server,
1da177e4 1959 };
1da177e4 1960 struct rpc_message msg = {
4fdc17b2
TM		 1961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1962 .rpc_argp = &args,
1963 .rpc_resp = &res,
1da177e4
LT		 1964 };
1965 int status;
1966
4fdc17b2 1967 nfs_fattr_init(&res.dir_attr);
16e42959
TM		 1968 status = rpc_call_sync(server->client, &msg, 0);
1969 if (status == 0) {
1970 update_changeattr(dir, &res.cinfo);
4fdc17b2 1971 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 1972 }
1da177e4
LT		 1973 return status;
1974}
1975
1976static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1977{
1978 struct nfs4_exception exception = { };
1979 int err;
1980 do {
1981 err = nfs4_handle_exception(NFS_SERVER(dir),
1982 _nfs4_proc_remove(dir, name),
1983 &exception);
1984 } while (exception.retry);
1985 return err;
1986}
1987
e4eff1a6 1988static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 1989{
e4eff1a6
TM		 1990 struct nfs_server *server = NFS_SERVER(dir);
1991 struct nfs_removeargs *args = msg->rpc_argp;
1992 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 1993
e4eff1a6
TM		 1994 args->bitmask = server->attr_bitmask;
1995 res->server = server;
1da177e4 1996 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 1997}
1998
e4eff1a6 1999static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2000{
e4eff1a6
TM		 2001 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2002
2003 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
2004 return 0;
2005 update_changeattr(dir, &res->cinfo);
2006 nfs_post_op_update_inode(dir, &res->dir_attr);
2007 return 1;
1da177e4
LT		 2008}
2009
2010static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2011 struct inode *new_dir, struct qstr *new_name)
2012{
6caf2c82 2013 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2014 struct nfs4_rename_arg arg = {
2015 .old_dir = NFS_FH(old_dir),
2016 .new_dir = NFS_FH(new_dir),
2017 .old_name = old_name,
2018 .new_name = new_name,
6caf2c82
TM		 2019 .bitmask = server->attr_bitmask,
2020 };
2021 struct nfs_fattr old_fattr, new_fattr;
2022 struct nfs4_rename_res res = {
2023 .server = server,
2024 .old_fattr = &old_fattr,
2025 .new_fattr = &new_fattr,
1da177e4 2026 };
1da177e4
LT		 2027 struct rpc_message msg = {
2028 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2029 .rpc_argp = &arg,
2030 .rpc_resp = &res,
2031 };
2032 int status;
2033
6caf2c82
TM		 2034 nfs_fattr_init(res.old_fattr);
2035 nfs_fattr_init(res.new_fattr);
2036 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2037
2038 if (!status) {
2039 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2040 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2041 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2042 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2043 }
2044 return status;
2045}
2046
2047static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2048 struct inode *new_dir, struct qstr *new_name)
2049{
2050 struct nfs4_exception exception = { };
2051 int err;
2052 do {
2053 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2054 _nfs4_proc_rename(old_dir, old_name,
2055 new_dir, new_name),
2056 &exception);
2057 } while (exception.retry);
2058 return err;
2059}
2060
2061static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2062{
91ba2eee 2063 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2064 struct nfs4_link_arg arg = {
2065 .fh = NFS_FH(inode),
2066 .dir_fh = NFS_FH(dir),
2067 .name = name,
91ba2eee
TM		 2068 .bitmask = server->attr_bitmask,
2069 };
2070 struct nfs_fattr fattr, dir_attr;
2071 struct nfs4_link_res res = {
2072 .server = server,
2073 .fattr = &fattr,
2074 .dir_attr = &dir_attr,
1da177e4 2075 };
1da177e4
LT		 2076 struct rpc_message msg = {
2077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2078 .rpc_argp = &arg,
91ba2eee 2079 .rpc_resp = &res,
1da177e4
LT		 2080 };
2081 int status;
2082
91ba2eee
TM		 2083 nfs_fattr_init(res.fattr);
2084 nfs_fattr_init(res.dir_attr);
2085 status = rpc_call_sync(server->client, &msg, 0);
2086 if (!status) {
2087 update_changeattr(dir, &res.cinfo);
2088 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2089 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2090 }
1da177e4
LT		 2091
2092 return status;
2093}
2094
2095static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2096{
2097 struct nfs4_exception exception = { };
2098 int err;
2099 do {
2100 err = nfs4_handle_exception(NFS_SERVER(inode),
2101 _nfs4_proc_link(inode, dir, name),
2102 &exception);
2103 } while (exception.retry);
2104 return err;
2105}
2106
57dc9a57
TM		 2107struct nfs4_createdata {
2108 struct rpc_message msg;
2109 struct nfs4_create_arg arg;
2110 struct nfs4_create_res res;
2111 struct nfs_fh fh;
2112 struct nfs_fattr fattr;
2113 struct nfs_fattr dir_fattr;
2114};
2115
2116static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2117 struct qstr *name, struct iattr *sattr, u32 ftype)
2118{
2119 struct nfs4_createdata *data;
2120
2121 data = kzalloc(sizeof(*data), GFP_KERNEL);
2122 if (data != NULL) {
2123 struct nfs_server *server = NFS_SERVER(dir);
2124
2125 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2126 data->msg.rpc_argp = &data->arg;
2127 data->msg.rpc_resp = &data->res;
2128 data->arg.dir_fh = NFS_FH(dir);
2129 data->arg.server = server;
2130 data->arg.name = name;
2131 data->arg.attrs = sattr;
2132 data->arg.ftype = ftype;
2133 data->arg.bitmask = server->attr_bitmask;
2134 data->res.server = server;
2135 data->res.fh = &data->fh;
2136 data->res.fattr = &data->fattr;
2137 data->res.dir_fattr = &data->dir_fattr;
2138 nfs_fattr_init(data->res.fattr);
2139 nfs_fattr_init(data->res.dir_fattr);
2140 }
2141 return data;
2142}
2143
2144static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2145{
2146 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2147 if (status == 0) {
2148 update_changeattr(dir, &data->res.dir_cinfo);
2149 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2150 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2151 }
2152 return status;
2153}
2154
2155static void nfs4_free_createdata(struct nfs4_createdata *data)
2156{
2157 kfree(data);
2158}
2159
4f390c15 2160static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2161 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2162{
57dc9a57
TM		 2163 struct nfs4_createdata *data;
2164 int status = -ENAMETOOLONG;
1da177e4 2165
94a6d753 2166 if (len > NFS4_MAXPATHLEN)
57dc9a57 2167 goto out;
4f390c15 2168
57dc9a57
TM		 2169 status = -ENOMEM;
2170 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2171 if (data == NULL)
2172 goto out;
2173
2174 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2175 data->arg.u.symlink.pages = &page;
2176 data->arg.u.symlink.len = len;
1da177e4 2177
57dc9a57
TM		 2178 status = nfs4_do_create(dir, dentry, data);
2179
2180 nfs4_free_createdata(data);
2181out:
1da177e4
LT		 2182 return status;
2183}
2184
4f390c15 2185static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2186 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2187{
2188 struct nfs4_exception exception = { };
2189 int err;
2190 do {
2191 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2192 _nfs4_proc_symlink(dir, dentry, page,
2193 len, sattr),
1da177e4
LT		 2194 &exception);
2195 } while (exception.retry);
2196 return err;
2197}
2198
2199static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2200 struct iattr *sattr)
2201{
57dc9a57
TM		 2202 struct nfs4_createdata *data;
2203 int status = -ENOMEM;
1da177e4 2204
57dc9a57
TM		 2205 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2206 if (data == NULL)
2207 goto out;
2208
2209 status = nfs4_do_create(dir, dentry, data);
2210
2211 nfs4_free_createdata(data);
2212out:
1da177e4
LT		 2213 return status;
2214}
2215
2216static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2217 struct iattr *sattr)
2218{
2219 struct nfs4_exception exception = { };
2220 int err;
2221 do {
2222 err = nfs4_handle_exception(NFS_SERVER(dir),
2223 _nfs4_proc_mkdir(dir, dentry, sattr),
2224 &exception);
2225 } while (exception.retry);
2226 return err;
2227}
2228
2229static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2230 u64 cookie, struct page *page, unsigned int count, int plus)
2231{
2232 struct inode *dir = dentry->d_inode;
2233 struct nfs4_readdir_arg args = {
2234 .fh = NFS_FH(dir),
2235 .pages = &page,
2236 .pgbase = 0,
2237 .count = count,
2238 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2239 };
2240 struct nfs4_readdir_res res;
2241 struct rpc_message msg = {
2242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2243 .rpc_argp = &args,
2244 .rpc_resp = &res,
2245 .rpc_cred = cred,
2246 };
2247 int status;
2248
3110ff80 2249 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2250 dentry->d_parent->d_name.name,
2251 dentry->d_name.name,
2252 (unsigned long long)cookie);
1da177e4
LT		 2253 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2254 res.pgbase = args.pgbase;
2255 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2256 if (status == 0)
2257 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2258
2259 nfs_invalidate_atime(dir);
2260
3110ff80 2261 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2262 return status;
2263}
2264
2265static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2266 u64 cookie, struct page *page, unsigned int count, int plus)
2267{
2268 struct nfs4_exception exception = { };
2269 int err;
2270 do {
2271 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2272 _nfs4_proc_readdir(dentry, cred, cookie,
2273 page, count, plus),
2274 &exception);
2275 } while (exception.retry);
2276 return err;
2277}
2278
2279static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2280 struct iattr *sattr, dev_t rdev)
2281{
57dc9a57
TM		 2282 struct nfs4_createdata *data;
2283 int mode = sattr->ia_mode;
2284 int status = -ENOMEM;
1da177e4
LT		 2285
2286 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2287 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2288
2289 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2290 if (data == NULL)
2291 goto out;
2292
1da177e4 2293 if (S_ISFIFO(mode))
57dc9a57 2294 data->arg.ftype = NF4FIFO;
1da177e4 2295 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2296 data->arg.ftype = NF4BLK;
2297 data->arg.u.device.specdata1 = MAJOR(rdev);
2298 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2299 }
2300 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2301 data->arg.ftype = NF4CHR;
2302 data->arg.u.device.specdata1 = MAJOR(rdev);
2303 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2304 }
1da177e4 2305
57dc9a57
TM		 2306 status = nfs4_do_create(dir, dentry, data);
2307
2308 nfs4_free_createdata(data);
2309out:
1da177e4
LT		 2310 return status;
2311}
2312
2313static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2314 struct iattr *sattr, dev_t rdev)
2315{
2316 struct nfs4_exception exception = { };
2317 int err;
2318 do {
2319 err = nfs4_handle_exception(NFS_SERVER(dir),
2320 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2321 &exception);
2322 } while (exception.retry);
2323 return err;
2324}
2325
2326static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2327 struct nfs_fsstat *fsstat)
2328{
2329 struct nfs4_statfs_arg args = {
2330 .fh = fhandle,
2331 .bitmask = server->attr_bitmask,
2332 };
2333 struct rpc_message msg = {
2334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2335 .rpc_argp = &args,
2336 .rpc_resp = fsstat,
2337 };
2338
0e574af1 2339 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2340 return rpc_call_sync(server->client, &msg, 0);
2341}
2342
2343static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2344{
2345 struct nfs4_exception exception = { };
2346 int err;
2347 do {
2348 err = nfs4_handle_exception(server,
2349 _nfs4_proc_statfs(server, fhandle, fsstat),
2350 &exception);
2351 } while (exception.retry);
2352 return err;
2353}
2354
2355static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2356 struct nfs_fsinfo *fsinfo)
2357{
2358 struct nfs4_fsinfo_arg args = {
2359 .fh = fhandle,
2360 .bitmask = server->attr_bitmask,
2361 };
2362 struct rpc_message msg = {
2363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2364 .rpc_argp = &args,
2365 .rpc_resp = fsinfo,
2366 };
2367
2368 return rpc_call_sync(server->client, &msg, 0);
2369}
2370
2371static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2372{
2373 struct nfs4_exception exception = { };
2374 int err;
2375
2376 do {
2377 err = nfs4_handle_exception(server,
2378 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2379 &exception);
2380 } while (exception.retry);
2381 return err;
2382}
2383
2384static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2385{
0e574af1 2386 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2387 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2388}
2389
2390static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2391 struct nfs_pathconf *pathconf)
2392{
2393 struct nfs4_pathconf_arg args = {
2394 .fh = fhandle,
2395 .bitmask = server->attr_bitmask,
2396 };
2397 struct rpc_message msg = {
2398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2399 .rpc_argp = &args,
2400 .rpc_resp = pathconf,
2401 };
2402
2403 /* None of the pathconf attributes are mandatory to implement */
2404 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2405 memset(pathconf, 0, sizeof(*pathconf));
2406 return 0;
2407 }
2408
0e574af1 2409 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2410 return rpc_call_sync(server->client, &msg, 0);
2411}
2412
2413static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2414 struct nfs_pathconf *pathconf)
2415{
2416 struct nfs4_exception exception = { };
2417 int err;
2418
2419 do {
2420 err = nfs4_handle_exception(server,
2421 _nfs4_proc_pathconf(server, fhandle, pathconf),
2422 &exception);
2423 } while (exception.retry);
2424 return err;
2425}
2426
ec06c096 2427static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2428{
ec06c096 2429 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2430
ec06c096 2431 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2432 rpc_restart_call(task);
ec06c096 2433 return -EAGAIN;
1da177e4 2434 }
8850df99
TM		 2435
2436 nfs_invalidate_atime(data->inode);
1da177e4 2437 if (task->tk_status > 0)
ec06c096
TM		 2438 renew_lease(server, data->timestamp);
2439 return 0;
1da177e4
LT		 2440}
2441
bdc7f021 2442static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2443{
1da177e4 2444 data->timestamp = jiffies;
bdc7f021 2445 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2446}
2447
788e7a89 2448static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2449{
1da177e4
LT		 2450 struct inode *inode = data->inode;
2451
2452 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2453 rpc_restart_call(task);
788e7a89 2454 return -EAGAIN;
1da177e4 2455 }
4f9838c7 2456 if (task->tk_status >= 0) {
1da177e4 2457 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2458 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2459 }
788e7a89 2460 return 0;
1da177e4
LT		 2461}
2462
bdc7f021 2463static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2464{
bdc7f021
TM		 2465 struct nfs_server *server = NFS_SERVER(data->inode);
2466
4f9838c7
TM		 2467 data->args.bitmask = server->attr_bitmask;
2468 data->res.server = server;
1da177e4
LT		 2469 data->timestamp = jiffies;
2470
bdc7f021 2471 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2472}
2473
788e7a89 2474static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2475{
1da177e4
LT		 2476 struct inode *inode = data->inode;
2477
2478 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2479 rpc_restart_call(task);
788e7a89 2480 return -EAGAIN;
1da177e4 2481 }
9e08a3c5 2482 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2483 return 0;
1da177e4
LT		 2484}
2485
bdc7f021 2486static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2487{
788e7a89 2488 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2489
4f9838c7
TM		 2490 data->args.bitmask = server->attr_bitmask;
2491 data->res.server = server;
bdc7f021 2492 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2493}
2494
2495/*
2496 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2497 * standalone procedure for queueing an asynchronous RENEW.
2498 */
963d8fe5 2499static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2500{
adfa6f98 2501 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2502 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2503
2504 if (task->tk_status < 0) {
2505 switch (task->tk_status) {
2506 case -NFS4ERR_STALE_CLIENTID:
2507 case -NFS4ERR_EXPIRED:
2508 case -NFS4ERR_CB_PATH_DOWN:
2509 nfs4_schedule_state_recovery(clp);
2510 }
2511 return;
2512 }
2513 spin_lock(&clp->cl_lock);
2514 if (time_before(clp->cl_last_renewal,timestamp))
2515 clp->cl_last_renewal = timestamp;
2516 spin_unlock(&clp->cl_lock);
2517}
2518
963d8fe5
TM		 2519static const struct rpc_call_ops nfs4_renew_ops = {
2520 .rpc_call_done = nfs4_renew_done,
2521};
2522
adfa6f98 2523int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2524{
2525 struct rpc_message msg = {
2526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2527 .rpc_argp = clp,
b4454fe1 2528 .rpc_cred = cred,
1da177e4
LT		 2529 };
2530
2531 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2532 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2533}
2534
adfa6f98 2535int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2536{
2537 struct rpc_message msg = {
2538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2539 .rpc_argp = clp,
b4454fe1 2540 .rpc_cred = cred,
1da177e4
LT		 2541 };
2542 unsigned long now = jiffies;
2543 int status;
2544
2545 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2546 if (status < 0)
2547 return status;
2548 spin_lock(&clp->cl_lock);
2549 if (time_before(clp->cl_last_renewal,now))
2550 clp->cl_last_renewal = now;
2551 spin_unlock(&clp->cl_lock);
2552 return 0;
2553}
2554
aa1870af
BF		 2555static inline int nfs4_server_supports_acls(struct nfs_server *server)
2556{
2557 return (server->caps & NFS_CAP_ACLS)
2558 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2559 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2560}
2561
2562/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2563 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2564 * the stack.
2565 */
2566#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2567
2568static void buf_to_pages(const void *buf, size_t buflen,
2569 struct page **pages, unsigned int *pgbase)
2570{
2571 const void *p = buf;
2572
2573 *pgbase = offset_in_page(buf);
2574 p -= *pgbase;
2575 while (p < buf + buflen) {
2576 *(pages++) = virt_to_page(p);
2577 p += PAGE_CACHE_SIZE;
2578 }
2579}
2580
e50a1c2e
BF		 2581struct nfs4_cached_acl {
2582 int cached;
2583 size_t len;
3e9d4154 2584 char data[0];
e50a1c2e
BF		 2585};
2586
2587static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2588{
2589 struct nfs_inode *nfsi = NFS_I(inode);
2590
2591 spin_lock(&inode->i_lock);
2592 kfree(nfsi->nfs4_acl);
2593 nfsi->nfs4_acl = acl;
2594 spin_unlock(&inode->i_lock);
2595}
2596
2597static void nfs4_zap_acl_attr(struct inode *inode)
2598{
2599 nfs4_set_cached_acl(inode, NULL);
2600}
2601
2602static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2603{
2604 struct nfs_inode *nfsi = NFS_I(inode);
2605 struct nfs4_cached_acl *acl;
2606 int ret = -ENOENT;
2607
2608 spin_lock(&inode->i_lock);
2609 acl = nfsi->nfs4_acl;
2610 if (acl == NULL)
2611 goto out;
2612 if (buf == NULL) /* user is just asking for length */
2613 goto out_len;
2614 if (acl->cached == 0)
2615 goto out;
2616 ret = -ERANGE; /* see getxattr(2) man page */
2617 if (acl->len > buflen)
2618 goto out;
2619 memcpy(buf, acl->data, acl->len);
2620out_len:
2621 ret = acl->len;
2622out:
2623 spin_unlock(&inode->i_lock);
2624 return ret;
2625}
2626
2627static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2628{
2629 struct nfs4_cached_acl *acl;
2630
2631 if (buf && acl_len <= PAGE_SIZE) {
2632 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2633 if (acl == NULL)
2634 goto out;
2635 acl->cached = 1;
2636 memcpy(acl->data, buf, acl_len);
2637 } else {
2638 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2639 if (acl == NULL)
2640 goto out;
2641 acl->cached = 0;
2642 }
2643 acl->len = acl_len;
2644out:
2645 nfs4_set_cached_acl(inode, acl);
2646}
2647
16b4289c 2648static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2649{
aa1870af
BF		 2650 struct page *pages[NFS4ACL_MAXPAGES];
2651 struct nfs_getaclargs args = {
2652 .fh = NFS_FH(inode),
2653 .acl_pages = pages,
2654 .acl_len = buflen,
2655 };
2656 size_t resp_len = buflen;
e50a1c2e 2657 void *resp_buf;
aa1870af
BF		 2658 struct rpc_message msg = {
2659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2660 .rpc_argp = &args,
2661 .rpc_resp = &resp_len,
2662 };
e50a1c2e 2663 struct page *localpage = NULL;
aa1870af
BF		 2664 int ret;
2665
e50a1c2e
BF		 2666 if (buflen < PAGE_SIZE) {
2667 /* As long as we're doing a round trip to the server anyway,
2668 * let's be prepared for a page of acl data. */
2669 localpage = alloc_page(GFP_KERNEL);
2670 resp_buf = page_address(localpage);
2671 if (localpage == NULL)
2672 return -ENOMEM;
2673 args.acl_pages[0] = localpage;
2674 args.acl_pgbase = 0;
1d95db8e 2675 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2676 } else {
2677 resp_buf = buf;
2678 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2679 }
aa1870af 2680 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2681 if (ret)
2682 goto out_free;
2683 if (resp_len > args.acl_len)
2684 nfs4_write_cached_acl(inode, NULL, resp_len);
2685 else
2686 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2687 if (buf) {
2688 ret = -ERANGE;
2689 if (resp_len > buflen)
2690 goto out_free;
2691 if (localpage)
2692 memcpy(buf, resp_buf, resp_len);
2693 }
2694 ret = resp_len;
2695out_free:
2696 if (localpage)
2697 __free_page(localpage);
aa1870af
BF		 2698 return ret;
2699}
2700
16b4289c
TM		 2701static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2702{
2703 struct nfs4_exception exception = { };
2704 ssize_t ret;
2705 do {
2706 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2707 if (ret >= 0)
2708 break;
2709 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2710 } while (exception.retry);
2711 return ret;
2712}
2713
e50a1c2e
BF		 2714static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2715{
2716 struct nfs_server *server = NFS_SERVER(inode);
2717 int ret;
2718
2719 if (!nfs4_server_supports_acls(server))
2720 return -EOPNOTSUPP;
2721 ret = nfs_revalidate_inode(server, inode);
2722 if (ret < 0)
2723 return ret;
f41f7418
TM		 2724 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2725 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 2726 ret = nfs4_read_cached_acl(inode, buf, buflen);
2727 if (ret != -ENOENT)
2728 return ret;
2729 return nfs4_get_acl_uncached(inode, buf, buflen);
2730}
2731
16b4289c 2732static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2733{
2734 struct nfs_server *server = NFS_SERVER(inode);
2735 struct page *pages[NFS4ACL_MAXPAGES];
2736 struct nfs_setaclargs arg = {
2737 .fh = NFS_FH(inode),
2738 .acl_pages = pages,
2739 .acl_len = buflen,
2740 };
2741 struct rpc_message msg = {
2742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2743 .rpc_argp = &arg,
2744 .rpc_resp = NULL,
2745 };
2746 int ret;
2747
2748 if (!nfs4_server_supports_acls(server))
2749 return -EOPNOTSUPP;
642ac549 2750 nfs_inode_return_delegation(inode);
4b580ee3 2751 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2752 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
f41f7418
TM		 2753 nfs_access_zap_cache(inode);
2754 nfs_zap_acl_cache(inode);
4b580ee3
BF		 2755 return ret;
2756}
2757
16b4289c
TM		 2758static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2759{
2760 struct nfs4_exception exception = { };
2761 int err;
2762 do {
2763 err = nfs4_handle_exception(NFS_SERVER(inode),
2764 __nfs4_proc_set_acl(inode, buf, buflen),
2765 &exception);
2766 } while (exception.retry);
2767 return err;
2768}
2769
1da177e4 2770static int
faf5f49c 2771nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2772{
7539bbab 2773 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2774
2775 if (!clp || task->tk_status >= 0)
2776 return 0;
2777 switch(task->tk_status) {
2778 case -NFS4ERR_STALE_CLIENTID:
2779 case -NFS4ERR_STALE_STATEID:
2780 case -NFS4ERR_EXPIRED:
5d00837b 2781 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 2782 nfs4_schedule_state_recovery(clp);
433fbe4c 2783 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
fda13939 2784 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 2785 task->tk_status = 0;
2786 return -EAGAIN;
1da177e4 2787 case -NFS4ERR_DELAY:
2e96d286 2788 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 2789 case -NFS4ERR_GRACE:
1da177e4
LT		 2790 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2791 task->tk_status = 0;
2792 return -EAGAIN;
2793 case -NFS4ERR_OLD_STATEID:
2794 task->tk_status = 0;
2795 return -EAGAIN;
2796 }
2797 task->tk_status = nfs4_map_errors(task->tk_status);
2798 return 0;
2799}
2800
150030b7 2801static int nfs4_wait_bit_killable(void *word)
433fbe4c 2802{
150030b7 2803 if (fatal_signal_pending(current))
433fbe4c
TM		 2804 return -ERESTARTSYS;
2805 schedule();
2806 return 0;
2807}
2808
adfa6f98 2809static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2810{
433fbe4c 2811 int res;
1da177e4
LT		 2812
2813 might_sleep();
2814
e148582e
TM		 2815 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2816
433fbe4c 2817 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
150030b7 2818 nfs4_wait_bit_killable, TASK_KILLABLE);
e148582e
TM		 2819
2820 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT		 2821 return res;
2822}
2823
2824static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2825{
1da177e4
LT		 2826 int res = 0;
2827
2828 might_sleep();
2829
2830 if (*timeout <= 0)
2831 *timeout = NFS4_POLL_RETRY_MIN;
2832 if (*timeout > NFS4_POLL_RETRY_MAX)
2833 *timeout = NFS4_POLL_RETRY_MAX;
150030b7
MW		 2834 schedule_timeout_killable(*timeout);
2835 if (fatal_signal_pending(current))
2836 res = -ERESTARTSYS;
1da177e4
LT		 2837 *timeout <<= 1;
2838 return res;
2839}
2840
2841/* This is the error handling routine for processes that are allowed
2842 * to sleep.
2843 */
10afec90 2844static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2845{
7539bbab 2846 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2847 int ret = errorcode;
2848
2849 exception->retry = 0;
2850 switch(errorcode) {
2851 case 0:
2852 return 0;
2853 case -NFS4ERR_STALE_CLIENTID:
2854 case -NFS4ERR_STALE_STATEID:
2855 case -NFS4ERR_EXPIRED:
433fbe4c 2856 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2857 ret = nfs4_wait_clnt_recover(server->client, clp);
2858 if (ret == 0)
2859 exception->retry = 1;
2860 break;
c514983d 2861 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2862 case -NFS4ERR_GRACE:
2863 case -NFS4ERR_DELAY:
2864 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2865 if (ret != 0)
2866 break;
1da177e4 2867 case -NFS4ERR_OLD_STATEID:
2c56617d 2868 exception->retry = 1;
1da177e4
LT		 2869 }
2870 /* We failed to handle the error */
2871 return nfs4_map_errors(ret);
2872}
2873
adfa6f98 2874int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2875{
2876 nfs4_verifier sc_verifier;
2877 struct nfs4_setclientid setclientid = {
2878 .sc_verifier = &sc_verifier,
2879 .sc_prog = program,
2880 };
2881 struct rpc_message msg = {
2882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2883 .rpc_argp = &setclientid,
2884 .rpc_resp = clp,
286d7d6a 2885 .rpc_cred = cred,
1da177e4 2886 };
bc4785cd 2887 __be32 *p;
1da177e4
LT		 2888 int loop = 0;
2889 int status;
2890
bc4785cd 2891 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2892 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2893 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2894
2895 for(;;) {
2896 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 2897 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 2898 clp->cl_ipaddr,
2899 rpc_peeraddr2str(clp->cl_rpcclient,
2900 RPC_DISPLAY_ADDR),
69dd716c
TM		 2901 rpc_peeraddr2str(clp->cl_rpcclient,
2902 RPC_DISPLAY_PROTO),
78ea323b 2903 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 2904 clp->cl_id_uniquifier);
2905 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 2906 sizeof(setclientid.sc_netid),
2907 rpc_peeraddr2str(clp->cl_rpcclient,
2908 RPC_DISPLAY_NETID));
1da177e4 2909 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 2910 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 2911 clp->cl_ipaddr, port >> 8, port & 255);
2912
2913 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2914 if (status != -NFS4ERR_CLID_INUSE)
2915 break;
2916 if (signalled())
2917 break;
2918 if (loop++ & 1)
2919 ssleep(clp->cl_lease_time + 1);
2920 else
2921 if (++clp->cl_id_uniquifier == 0)
2922 break;
2923 }
2924 return status;
2925}
2926
adfa6f98 2927static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2928{
2929 struct nfs_fsinfo fsinfo;
2930 struct rpc_message msg = {
2931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2932 .rpc_argp = clp,
2933 .rpc_resp = &fsinfo,
286d7d6a 2934 .rpc_cred = cred,
1da177e4
LT		 2935 };
2936 unsigned long now;
2937 int status;
2938
2939 now = jiffies;
2940 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2941 if (status == 0) {
2942 spin_lock(&clp->cl_lock);
2943 clp->cl_lease_time = fsinfo.lease_time * HZ;
2944 clp->cl_last_renewal = now;
58d9714a 2945 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 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
LT		 3692struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3693 .recover_open = nfs4_open_reclaim,
3694 .recover_lock = nfs4_lock_reclaim,
3695};
3696
3697struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3698 .recover_open = nfs4_open_expired,
3699 .recover_lock = nfs4_lock_expired,
3700};
3701
92e1d5be 3702static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3703 .permission = nfs_permission,
3704 .getattr = nfs_getattr,
3705 .setattr = nfs_setattr,
3706 .getxattr = nfs4_getxattr,
3707 .setxattr = nfs4_setxattr,
3708 .listxattr = nfs4_listxattr,
3709};
3710
509de811 3711const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3712 .version = 4, /* protocol version */
3713 .dentry_ops = &nfs4_dentry_operations,
3714 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3715 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3716 .getroot = nfs4_proc_get_root,
3717 .getattr = nfs4_proc_getattr,
3718 .setattr = nfs4_proc_setattr,
2b3de441 3719 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3720 .lookup = nfs4_proc_lookup,
3721 .access = nfs4_proc_access,
3722 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3723 .create = nfs4_proc_create,
3724 .remove = nfs4_proc_remove,
3725 .unlink_setup = nfs4_proc_unlink_setup,
3726 .unlink_done = nfs4_proc_unlink_done,
3727 .rename = nfs4_proc_rename,
3728 .link = nfs4_proc_link,
3729 .symlink = nfs4_proc_symlink,
3730 .mkdir = nfs4_proc_mkdir,
3731 .rmdir = nfs4_proc_remove,
3732 .readdir = nfs4_proc_readdir,
3733 .mknod = nfs4_proc_mknod,
3734 .statfs = nfs4_proc_statfs,
3735 .fsinfo = nfs4_proc_fsinfo,
3736 .pathconf = nfs4_proc_pathconf,
e9326dca 3737 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3738 .decode_dirent = nfs4_decode_dirent,
3739 .read_setup = nfs4_proc_read_setup,
ec06c096 3740 .read_done = nfs4_read_done,
1da177e4 3741 .write_setup = nfs4_proc_write_setup,
788e7a89 3742 .write_done = nfs4_write_done,
1da177e4 3743 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3744 .commit_done = nfs4_commit_done,
1da177e4 3745 .lock = nfs4_proc_lock,
e50a1c2e 3746 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3747};
3748
3749/*
3750 * Local variables:
3751 * c-basic-offset: 8
3752 * End:
3753 */
Linux 6.x block layer and io_uring tree(s)