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nfs/lsm: make NFSv4 set LSM mount options
[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",
76 __FUNCTION__, -err);
77 return -EIO;
78 }
79 return err;
80}
81
82/*
83 * This is our standard bitmap for GETATTR requests.
84 */
85const u32 nfs4_fattr_bitmap[2] = {
86 FATTR4_WORD0_TYPE
87 | FATTR4_WORD0_CHANGE
88 | FATTR4_WORD0_SIZE
89 | FATTR4_WORD0_FSID
90 | FATTR4_WORD0_FILEID,
91 FATTR4_WORD1_MODE
92 | FATTR4_WORD1_NUMLINKS
93 | FATTR4_WORD1_OWNER
94 | FATTR4_WORD1_OWNER_GROUP
95 | FATTR4_WORD1_RAWDEV
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
100};
101
102const u32 nfs4_statfs_bitmap[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
109};
110
4ce79717 111const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 112 FATTR4_WORD0_MAXLINK
113 | FATTR4_WORD0_MAXNAME,
114 0
115};
116
117const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME,
121 0
122};
123
830b8e33
MN		 124const u32 nfs4_fs_locations_bitmap[2] = {
125 FATTR4_WORD0_TYPE
126 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_SIZE
128 | FATTR4_WORD0_FSID
129 | FATTR4_WORD0_FILEID
130 | FATTR4_WORD0_FS_LOCATIONS,
131 FATTR4_WORD1_MODE
132 | FATTR4_WORD1_NUMLINKS
133 | FATTR4_WORD1_OWNER
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140 | FATTR4_WORD1_MOUNTED_ON_FILEID
141};
142
bc4785cd 143static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 144 struct nfs4_readdir_arg *readdir)
145{
0dbb4c67 146 __be32 *start, *p;
1da177e4
LT		 147
148 BUG_ON(readdir->count < 80);
149 if (cookie > 2) {
b7ef1956 150 readdir->cookie = cookie;
1da177e4
LT		 151 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
152 return;
153 }
154
155 readdir->cookie = 0;
156 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
157 if (cookie == 2)
158 return;
159
160 /*
161 * NFSv4 servers do not return entries for '.' and '..'
162 * Therefore, we fake these entries here. We let '.'
163 * have cookie 0 and '..' have cookie 1. Note that
164 * when talking to the server, we always send cookie 0
165 * instead of 1 or 2.
166 */
0dbb4c67 167 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 168
169 if (cookie == 0) {
170 *p++ = xdr_one; /* next */
171 *p++ = xdr_zero; /* cookie, first word */
172 *p++ = xdr_one; /* cookie, second word */
173 *p++ = xdr_one; /* entry len */
174 memcpy(p, ".\0\0\0", 4); /* entry */
175 p++;
176 *p++ = xdr_one; /* bitmap length */
177 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
178 *p++ = htonl(8); /* attribute buffer length */
4e769b93 179 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 180 }
181
182 *p++ = xdr_one; /* next */
183 *p++ = xdr_zero; /* cookie, first word */
184 *p++ = xdr_two; /* cookie, second word */
185 *p++ = xdr_two; /* entry len */
186 memcpy(p, "..\0\0", 4); /* entry */
187 p++;
188 *p++ = xdr_one; /* bitmap length */
189 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
190 *p++ = htonl(8); /* attribute buffer length */
4e769b93 191 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 192
193 readdir->pgbase = (char *)p - (char *)start;
194 readdir->count -= readdir->pgbase;
195 kunmap_atomic(start, KM_USER0);
196}
197
26e976a8 198static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 199{
7539bbab 200 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 201 spin_lock(&clp->cl_lock);
202 if (time_before(clp->cl_last_renewal,timestamp))
203 clp->cl_last_renewal = timestamp;
204 spin_unlock(&clp->cl_lock);
205}
206
38478b24 207static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 208{
38478b24 209 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 210
38478b24 211 spin_lock(&dir->i_lock);
40d24704
TM		 212 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
213 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 214 nfs_force_lookup_revalidate(dir);
40d24704 215 nfsi->change_attr = cinfo->after;
38478b24 216 spin_unlock(&dir->i_lock);
1da177e4
LT		 217}
218
e56e0b78 219struct nfs4_opendata {
c6d00e63 220 struct kref kref;
e56e0b78
TM		 221 struct nfs_openargs o_arg;
222 struct nfs_openres o_res;
cdd4e68b
TM		 223 struct nfs_open_confirmargs c_arg;
224 struct nfs_open_confirmres c_res;
e56e0b78
TM		 225 struct nfs_fattr f_attr;
226 struct nfs_fattr dir_attr;
ad389da7 227 struct path path;
e56e0b78
TM		 228 struct dentry *dir;
229 struct nfs4_state_owner *owner;
aac00a8d 230 struct nfs4_state *state;
e56e0b78 231 struct iattr attrs;
26e976a8 232 unsigned long timestamp;
3e309914 233 unsigned int rpc_done : 1;
24ac23ab
TM		 234 int rpc_status;
235 int cancelled;
e56e0b78
TM		 236};
237
2ced46c2
TM		 238
239static void nfs4_init_opendata_res(struct nfs4_opendata *p)
240{
241 p->o_res.f_attr = &p->f_attr;
242 p->o_res.dir_attr = &p->dir_attr;
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);
309 dput(p->path.dentry);
310 mntput(p->path.mnt);
311 kfree(p);
312}
313
314static void nfs4_opendata_put(struct nfs4_opendata *p)
315{
316 if (p != NULL)
317 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 318}
319
06f814a3
TM		 320static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
321{
06f814a3
TM		 322 int ret;
323
06f814a3 324 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 325 return ret;
326}
327
6ee41268
TM		 328static int can_open_cached(struct nfs4_state *state, int mode)
329{
330 int ret = 0;
331 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
332 case FMODE_READ:
333 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 334 break;
335 case FMODE_WRITE:
336 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 337 break;
338 case FMODE_READ|FMODE_WRITE:
339 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
340 }
341 return ret;
342}
343
aac00a8d
TM		 344static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
345{
346 if ((delegation->type & open_flags) != open_flags)
347 return 0;
348 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
349 return 0;
350 return 1;
351}
352
003707c7 353static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
e7616923
TM		 354{
355 switch (open_flags) {
356 case FMODE_WRITE:
357 state->n_wronly++;
358 break;
359 case FMODE_READ:
360 state->n_rdonly++;
361 break;
362 case FMODE_READ|FMODE_WRITE:
363 state->n_rdwr++;
364 }
003707c7
TM		 365 nfs4_state_set_mode_locked(state, state->state | open_flags);
366}
367
368static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
369{
370 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
371 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
372 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
373 switch (open_flags) {
374 case FMODE_READ:
375 set_bit(NFS_O_RDONLY_STATE, &state->flags);
376 break;
377 case FMODE_WRITE:
378 set_bit(NFS_O_WRONLY_STATE, &state->flags);
379 break;
380 case FMODE_READ|FMODE_WRITE:
381 set_bit(NFS_O_RDWR_STATE, &state->flags);
382 }
e7616923
TM		 383}
384
003707c7
TM		 385static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
386{
8bda4e4c 387 write_seqlock(&state->seqlock);
003707c7 388 nfs_set_open_stateid_locked(state, stateid, open_flags);
8bda4e4c 389 write_sequnlock(&state->seqlock);
003707c7
TM		 390}
391
392static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
1da177e4 393{
1da177e4 394 open_flags &= (FMODE_READ|FMODE_WRITE);
8bda4e4c
TM		 395 /*
396 * Protect the call to nfs4_state_set_mode_locked and
397 * serialise the stateid update
398 */
399 write_seqlock(&state->seqlock);
003707c7
TM		 400 if (deleg_stateid != NULL) {
401 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
402 set_bit(NFS_DELEGATED_STATE, &state->flags);
403 }
404 if (open_stateid != NULL)
405 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
8bda4e4c
TM		 406 write_sequnlock(&state->seqlock);
407 spin_lock(&state->owner->so_lock);
e7616923 408 update_open_stateflags(state, open_flags);
ec073428 409 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 410}
411
aac00a8d
TM		 412static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
413{
414 struct nfs_delegation *delegation;
415
416 rcu_read_lock();
417 delegation = rcu_dereference(NFS_I(inode)->delegation);
418 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
419 rcu_read_unlock();
420 return;
421 }
422 rcu_read_unlock();
423 nfs_inode_return_delegation(inode);
424}
425
6ee41268 426static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 427{
428 struct nfs4_state *state = opendata->state;
429 struct nfs_inode *nfsi = NFS_I(state->inode);
430 struct nfs_delegation *delegation;
431 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
432 nfs4_stateid stateid;
433 int ret = -EAGAIN;
434
435 rcu_read_lock();
436 delegation = rcu_dereference(nfsi->delegation);
aac00a8d 437 for (;;) {
6ee41268
TM		 438 if (can_open_cached(state, open_mode)) {
439 spin_lock(&state->owner->so_lock);
440 if (can_open_cached(state, open_mode)) {
441 update_open_stateflags(state, open_mode);
442 spin_unlock(&state->owner->so_lock);
443 rcu_read_unlock();
444 goto out_return_state;
445 }
446 spin_unlock(&state->owner->so_lock);
447 }
448 if (delegation == NULL)
449 break;
aac00a8d
TM		 450 if (!can_open_delegated(delegation, open_mode))
451 break;
452 /* Save the delegation */
453 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
454 rcu_read_unlock();
455 lock_kernel();
af22f94a 456 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 457 unlock_kernel();
458 if (ret != 0)
459 goto out;
460 ret = -EAGAIN;
461 rcu_read_lock();
462 delegation = rcu_dereference(nfsi->delegation);
6ee41268 463 /* If no delegation, try a cached open */
aac00a8d 464 if (delegation == NULL)
6ee41268 465 continue;
aac00a8d
TM		 466 /* Is the delegation still valid? */
467 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
468 continue;
469 rcu_read_unlock();
470 update_open_stateid(state, NULL, &stateid, open_mode);
471 goto out_return_state;
472 }
aac00a8d
TM		 473 rcu_read_unlock();
474out:
475 return ERR_PTR(ret);
476out_return_state:
477 atomic_inc(&state->count);
478 return state;
479}
480
24ac23ab
TM		 481static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
482{
483 struct inode *inode;
484 struct nfs4_state *state = NULL;
003707c7
TM		 485 struct nfs_delegation *delegation;
486 nfs4_stateid *deleg_stateid = NULL;
1b370bc2 487 int ret;
24ac23ab 488
aac00a8d 489 if (!data->rpc_done) {
6ee41268 490 state = nfs4_try_open_cached(data);
aac00a8d
TM		 491 goto out;
492 }
493
1b370bc2 494 ret = -EAGAIN;
24ac23ab 495 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 496 goto err;
24ac23ab 497 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 498 ret = PTR_ERR(inode);
03f28e3a 499 if (IS_ERR(inode))
1b370bc2
TM		 500 goto err;
501 ret = -ENOMEM;
24ac23ab
TM		 502 state = nfs4_get_open_state(inode, data->owner);
503 if (state == NULL)
1b370bc2 504 goto err_put_inode;
549d6ed5 505 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 506 int delegation_flags = 0;
507
003707c7
TM		 508 rcu_read_lock();
509 delegation = rcu_dereference(NFS_I(inode)->delegation);
510 if (delegation)
511 delegation_flags = delegation->flags;
512 rcu_read_unlock();
549d6ed5
TM		 513 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
514 nfs_inode_set_delegation(state->inode,
515 data->owner->so_cred,
516 &data->o_res);
517 else
518 nfs_inode_reclaim_delegation(state->inode,
519 data->owner->so_cred,
520 &data->o_res);
521 }
003707c7
TM		 522 rcu_read_lock();
523 delegation = rcu_dereference(NFS_I(inode)->delegation);
524 if (delegation != NULL)
525 deleg_stateid = &delegation->stateid;
526 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
527 rcu_read_unlock();
24ac23ab 528 iput(inode);
aac00a8d 529out:
24ac23ab 530 return state;
1b370bc2
TM		 531err_put_inode:
532 iput(inode);
533err:
534 return ERR_PTR(ret);
24ac23ab
TM		 535}
536
864472e9
TM		 537static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
538{
539 struct nfs_inode *nfsi = NFS_I(state->inode);
540 struct nfs_open_context *ctx;
541
542 spin_lock(&state->inode->i_lock);
543 list_for_each_entry(ctx, &nfsi->open_files, list) {
544 if (ctx->state != state)
545 continue;
546 get_nfs_open_context(ctx);
547 spin_unlock(&state->inode->i_lock);
548 return ctx;
549 }
550 spin_unlock(&state->inode->i_lock);
551 return ERR_PTR(-ENOENT);
552}
553
6f220ed5
TM		 554static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
555{
556 struct nfs4_opendata *opendata;
557
558 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
559 if (opendata == NULL)
560 return ERR_PTR(-ENOMEM);
561 opendata->state = state;
562 atomic_inc(&state->count);
563 return opendata;
564}
565
2ced46c2 566static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
864472e9 567{
2ced46c2 568 struct nfs4_state *newstate;
864472e9
TM		 569 int ret;
570
571 opendata->o_arg.open_flags = openflags;
2ced46c2
TM		 572 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
573 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
574 nfs4_init_opendata_res(opendata);
864472e9
TM		 575 ret = _nfs4_proc_open(opendata);
576 if (ret != 0)
577 return ret;
2ced46c2 578 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 579 if (IS_ERR(newstate))
580 return PTR_ERR(newstate);
581 nfs4_close_state(&opendata->path, newstate, openflags);
2ced46c2 582 *res = newstate;
864472e9
TM		 583 return 0;
584}
585
586static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
587{
864472e9 588 struct nfs4_state *newstate;
864472e9
TM		 589 int ret;
590
591 /* memory barrier prior to reading state->n_* */
2ced46c2 592 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 593 smp_rmb();
594 if (state->n_rdwr != 0) {
2ced46c2 595 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 596 if (ret != 0)
597 return ret;
2ced46c2
TM		 598 if (newstate != state)
599 return -ESTALE;
864472e9
TM		 600 }
601 if (state->n_wronly != 0) {
2ced46c2 602 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 603 if (ret != 0)
604 return ret;
2ced46c2
TM		 605 if (newstate != state)
606 return -ESTALE;
864472e9
TM		 607 }
608 if (state->n_rdonly != 0) {
2ced46c2 609 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 610 if (ret != 0)
611 return ret;
2ced46c2
TM		 612 if (newstate != state)
613 return -ESTALE;
864472e9 614 }
1ac7e2fd
TM		 615 /*
616 * We may have performed cached opens for all three recoveries.
617 * Check if we need to update the current stateid.
618 */
619 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
620 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 621 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 622 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
623 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 624 write_sequnlock(&state->seqlock);
1ac7e2fd 625 }
864472e9
TM		 626 return 0;
627}
628
1da177e4
LT		 629/*
630 * OPEN_RECLAIM:
631 * reclaim state on the server after a reboot.
1da177e4 632 */
539cd03a 633static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 634{
1ac7e2fd 635 struct nfs_delegation *delegation;
864472e9
TM		 636 struct nfs4_opendata *opendata;
637 int delegation_type = 0;
1da177e4
LT		 638 int status;
639
6f220ed5
TM		 640 opendata = nfs4_open_recoverdata_alloc(ctx, state);
641 if (IS_ERR(opendata))
642 return PTR_ERR(opendata);
864472e9
TM		 643 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
644 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 645 rcu_read_lock();
646 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
647 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
65bbf6bd 648 delegation_type = delegation->type;
1ac7e2fd 649 rcu_read_unlock();
864472e9
TM		 650 opendata->o_arg.u.delegation_type = delegation_type;
651 status = nfs4_open_recover(opendata, state);
c6d00e63 652 nfs4_opendata_put(opendata);
1da177e4
LT		 653 return status;
654}
655
539cd03a 656static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 657{
658 struct nfs_server *server = NFS_SERVER(state->inode);
659 struct nfs4_exception exception = { };
660 int err;
661 do {
539cd03a 662 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 663 if (err != -NFS4ERR_DELAY)
664 break;
665 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 666 } while (exception.retry);
667 return err;
668}
669
864472e9
TM		 670static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
671{
672 struct nfs_open_context *ctx;
673 int ret;
674
675 ctx = nfs4_state_find_open_context(state);
676 if (IS_ERR(ctx))
677 return PTR_ERR(ctx);
539cd03a 678 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 679 put_nfs_open_context(ctx);
680 return ret;
681}
682
13437e12 683static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 684{
e56e0b78 685 struct nfs4_opendata *opendata;
864472e9 686 int ret;
1da177e4 687
6f220ed5
TM		 688 opendata = nfs4_open_recoverdata_alloc(ctx, state);
689 if (IS_ERR(opendata))
690 return PTR_ERR(opendata);
e56e0b78 691 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 692 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 693 sizeof(opendata->o_arg.u.delegation.data));
864472e9 694 ret = nfs4_open_recover(opendata, state);
c6d00e63 695 nfs4_opendata_put(opendata);
864472e9 696 return ret;
1da177e4
LT		 697}
698
13437e12 699int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 700{
701 struct nfs4_exception exception = { };
539cd03a 702 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 703 int err;
704 do {
13437e12 705 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 706 switch (err) {
707 case 0:
708 return err;
709 case -NFS4ERR_STALE_CLIENTID:
710 case -NFS4ERR_STALE_STATEID:
711 case -NFS4ERR_EXPIRED:
712 /* Don't recall a delegation if it was lost */
7539bbab 713 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 714 return err;
715 }
716 err = nfs4_handle_exception(server, err, &exception);
717 } while (exception.retry);
718 return err;
719}
720
cdd4e68b
TM		 721static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
722{
723 struct nfs4_opendata *data = calldata;
724
725 data->rpc_status = task->tk_status;
726 if (RPC_ASSASSINATED(task))
727 return;
26e976a8 728 if (data->rpc_status == 0) {
cdd4e68b
TM		 729 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
730 sizeof(data->o_res.stateid.data));
bb22629e 731 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 732 renew_lease(data->o_res.server, data->timestamp);
3e309914 733 data->rpc_done = 1;
26e976a8 734 }
cdd4e68b
TM		 735}
736
737static void nfs4_open_confirm_release(void *calldata)
738{
739 struct nfs4_opendata *data = calldata;
740 struct nfs4_state *state = NULL;
741
742 /* If this request hasn't been cancelled, do nothing */
743 if (data->cancelled == 0)
744 goto out_free;
745 /* In case of error, no cleanup! */
3e309914 746 if (!data->rpc_done)
cdd4e68b 747 goto out_free;
cdd4e68b 748 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 749 if (!IS_ERR(state))
4a35bd41 750 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
cdd4e68b 751out_free:
c6d00e63 752 nfs4_opendata_put(data);
cdd4e68b
TM		 753}
754
755static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 756 .rpc_call_done = nfs4_open_confirm_done,
757 .rpc_release = nfs4_open_confirm_release,
758};
759
760/*
761 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
762 */
763static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
764{
765 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
766 struct rpc_task *task;
5138fde0
TM		 767 struct rpc_message msg = {
768 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
769 .rpc_argp = &data->c_arg,
770 .rpc_resp = &data->c_res,
771 .rpc_cred = data->owner->so_cred,
772 };
c970aa85
TM		 773 struct rpc_task_setup task_setup_data = {
774 .rpc_client = server->client,
5138fde0 775 .rpc_message = &msg,
c970aa85
TM		 776 .callback_ops = &nfs4_open_confirm_ops,
777 .callback_data = data,
101070ca 778 .workqueue = nfsiod_workqueue,
c970aa85
TM		 779 .flags = RPC_TASK_ASYNC,
780 };
1da177e4
LT		 781 int status;
782
c6d00e63 783 kref_get(&data->kref);
3e309914
TM		 784 data->rpc_done = 0;
785 data->rpc_status = 0;
5138fde0 786 data->timestamp = jiffies;
c970aa85 787 task = rpc_run_task(&task_setup_data);
7a1218a2 788 if (IS_ERR(task))
cdd4e68b 789 return PTR_ERR(task);
cdd4e68b
TM		 790 status = nfs4_wait_for_completion_rpc_task(task);
791 if (status != 0) {
792 data->cancelled = 1;
793 smp_wmb();
794 } else
795 status = data->rpc_status;
e6b3c4db 796 rpc_put_task(task);
1da177e4
LT		 797 return status;
798}
799
24ac23ab 800static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 801{
24ac23ab
TM		 802 struct nfs4_opendata *data = calldata;
803 struct nfs4_state_owner *sp = data->owner;
5138fde0 804
24ac23ab
TM		 805 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
806 return;
aac00a8d
TM		 807 /*
808 * Check if we still need to send an OPEN call, or if we can use
809 * a delegation instead.
810 */
811 if (data->state != NULL) {
812 struct nfs_delegation *delegation;
813
6ee41268
TM		 814 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
815 goto out_no_action;
aac00a8d
TM		 816 rcu_read_lock();
817 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
818 if (delegation != NULL &&
819 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
820 rcu_read_unlock();
6ee41268 821 goto out_no_action;
aac00a8d
TM		 822 }
823 rcu_read_unlock();
824 }
24ac23ab 825 /* Update sequence id. */
9f958ab8 826 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 827 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 828 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 829 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 830 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
831 }
26e976a8 832 data->timestamp = jiffies;
5138fde0 833 rpc_call_start(task);
6ee41268
TM		 834 return;
835out_no_action:
836 task->tk_action = NULL;
837
24ac23ab 838}
1da177e4 839
24ac23ab
TM		 840static void nfs4_open_done(struct rpc_task *task, void *calldata)
841{
842 struct nfs4_opendata *data = calldata;
1da177e4 843
24ac23ab
TM		 844 data->rpc_status = task->tk_status;
845 if (RPC_ASSASSINATED(task))
846 return;
847 if (task->tk_status == 0) {
848 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 849 case S_IFREG:
850 break;
851 case S_IFLNK:
24ac23ab 852 data->rpc_status = -ELOOP;
6f926b5b
TM		 853 break;
854 case S_IFDIR:
24ac23ab 855 data->rpc_status = -EISDIR;
6f926b5b
TM		 856 break;
857 default:
24ac23ab 858 data->rpc_status = -ENOTDIR;
6f926b5b 859 }
26e976a8 860 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 861 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
862 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 863 }
3e309914 864 data->rpc_done = 1;
24ac23ab 865}
6f926b5b 866
24ac23ab
TM		 867static void nfs4_open_release(void *calldata)
868{
869 struct nfs4_opendata *data = calldata;
870 struct nfs4_state *state = NULL;
871
872 /* If this request hasn't been cancelled, do nothing */
873 if (data->cancelled == 0)
874 goto out_free;
875 /* In case of error, no cleanup! */
3e309914 876 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 877 goto out_free;
878 /* In case we need an open_confirm, no cleanup! */
879 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
880 goto out_free;
24ac23ab 881 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 882 if (!IS_ERR(state))
4a35bd41 883 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
24ac23ab 884out_free:
c6d00e63 885 nfs4_opendata_put(data);
24ac23ab
TM		 886}
887
888static const struct rpc_call_ops nfs4_open_ops = {
889 .rpc_call_prepare = nfs4_open_prepare,
890 .rpc_call_done = nfs4_open_done,
891 .rpc_release = nfs4_open_release,
892};
893
894/*
895 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
896 */
897static int _nfs4_proc_open(struct nfs4_opendata *data)
898{
899 struct inode *dir = data->dir->d_inode;
900 struct nfs_server *server = NFS_SERVER(dir);
901 struct nfs_openargs *o_arg = &data->o_arg;
902 struct nfs_openres *o_res = &data->o_res;
903 struct rpc_task *task;
5138fde0
TM		 904 struct rpc_message msg = {
905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
906 .rpc_argp = o_arg,
907 .rpc_resp = o_res,
908 .rpc_cred = data->owner->so_cred,
909 };
c970aa85
TM		 910 struct rpc_task_setup task_setup_data = {
911 .rpc_client = server->client,
5138fde0 912 .rpc_message = &msg,
c970aa85
TM		 913 .callback_ops = &nfs4_open_ops,
914 .callback_data = data,
101070ca 915 .workqueue = nfsiod_workqueue,
c970aa85
TM		 916 .flags = RPC_TASK_ASYNC,
917 };
24ac23ab
TM		 918 int status;
919
c6d00e63 920 kref_get(&data->kref);
3e309914
TM		 921 data->rpc_done = 0;
922 data->rpc_status = 0;
2ced46c2 923 data->cancelled = 0;
c970aa85 924 task = rpc_run_task(&task_setup_data);
7a1218a2 925 if (IS_ERR(task))
24ac23ab 926 return PTR_ERR(task);
24ac23ab
TM		 927 status = nfs4_wait_for_completion_rpc_task(task);
928 if (status != 0) {
929 data->cancelled = 1;
930 smp_wmb();
931 } else
932 status = data->rpc_status;
e6b3c4db 933 rpc_put_task(task);
3e309914 934 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 935 return status;
936
9936781d
TM		 937 if (o_res->fh.size == 0)
938 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
939
56ae19f3
TM		 940 if (o_arg->open_flags & O_CREAT) {
941 update_changeattr(dir, &o_res->cinfo);
942 nfs_post_op_update_inode(dir, o_res->dir_attr);
943 } else
944 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 945 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 946 status = _nfs4_proc_open_confirm(data);
1da177e4 947 if (status != 0)
24ac23ab 948 return status;
1da177e4
LT		 949 }
950 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 951 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 952 return 0;
1da177e4
LT		 953}
954
10afec90 955static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 956{
7539bbab 957 struct nfs_client *clp = server->nfs_client;
6b30954e 958 int ret;
58d9714a 959
6b30954e
TM		 960 for (;;) {
961 ret = nfs4_wait_clnt_recover(server->client, clp);
962 if (ret != 0)
963 return ret;
964 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
965 break;
58d9714a 966 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 967 }
968 return 0;
58d9714a
TM		 969}
970
1da177e4
LT		 971/*
972 * OPEN_EXPIRED:
973 * reclaim state on the server after a network partition.
974 * Assumes caller holds the appropriate lock
975 */
539cd03a 976static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 977{
e56e0b78 978 struct nfs4_opendata *opendata;
864472e9 979 int ret;
1da177e4 980
6f220ed5
TM		 981 opendata = nfs4_open_recoverdata_alloc(ctx, state);
982 if (IS_ERR(opendata))
983 return PTR_ERR(opendata);
864472e9 984 ret = nfs4_open_recover(opendata, state);
35d05778 985 if (ret == -ESTALE)
539cd03a 986 d_drop(ctx->path.dentry);
c6d00e63 987 nfs4_opendata_put(opendata);
864472e9 988 return ret;
1da177e4
LT		 989}
990
539cd03a 991static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 992{
539cd03a 993 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 994 struct nfs4_exception exception = { };
995 int err;
996
997 do {
539cd03a 998 err = _nfs4_open_expired(ctx, state);
202b50dc
TM		 999 if (err == -NFS4ERR_DELAY)
1000 nfs4_handle_exception(server, err, &exception);
1001 } while (exception.retry);
1002 return err;
1003}
1004
1da177e4
LT		 1005static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1006{
1da177e4 1007 struct nfs_open_context *ctx;
864472e9 1008 int ret;
1da177e4 1009
864472e9
TM		 1010 ctx = nfs4_state_find_open_context(state);
1011 if (IS_ERR(ctx))
1012 return PTR_ERR(ctx);
539cd03a 1013 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1014 put_nfs_open_context(ctx);
1015 return ret;
1da177e4
LT		 1016}
1017
aa53ed54
JL		 1018/*
1019 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1020 * fields corresponding to attributes that were used to store the verifier.
1021 * Make sure we clobber those fields in the later setattr call
1022 */
1023static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1024{
1025 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1026 !(sattr->ia_valid & ATTR_ATIME_SET))
1027 sattr->ia_valid |= ATTR_ATIME;
1028
1029 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1030 !(sattr->ia_valid & ATTR_MTIME_SET))
1031 sattr->ia_valid |= ATTR_MTIME;
1032}
1033
1da177e4 1034/*
24ac23ab 1035 * Returns a referenced nfs4_state
1da177e4 1036 */
ad389da7 1037static 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		 1038{
1039 struct nfs4_state_owner *sp;
1040 struct nfs4_state *state = NULL;
1041 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 1042 struct nfs_client *clp = server->nfs_client;
e56e0b78 1043 struct nfs4_opendata *opendata;
aac00a8d 1044 int status;
1da177e4
LT		 1045
1046 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1047 status = -ENOMEM;
1048 if (!(sp = nfs4_get_state_owner(server, cred))) {
1049 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1050 goto out_err;
1051 }
58d9714a
TM		 1052 status = nfs4_recover_expired_lease(server);
1053 if (status != 0)
b4454fe1 1054 goto err_put_state_owner;
aac00a8d
TM		 1055 if (path->dentry->d_inode != NULL)
1056 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
58d9714a
TM		 1057 down_read(&clp->cl_sem);
1058 status = -ENOMEM;
ad389da7 1059 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
e56e0b78 1060 if (opendata == NULL)
76723de0 1061 goto err_release_rwsem;
1da177e4 1062
aac00a8d
TM		 1063 if (path->dentry->d_inode != NULL)
1064 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1065
24ac23ab 1066 status = _nfs4_proc_open(opendata);
1da177e4 1067 if (status != 0)
c6d00e63 1068 goto err_opendata_put;
1da177e4 1069
aa53ed54
JL		 1070 if (opendata->o_arg.open_flags & O_EXCL)
1071 nfs4_exclusive_attrset(opendata, sattr);
1072
24ac23ab 1073 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1074 status = PTR_ERR(state);
1075 if (IS_ERR(state))
c6d00e63 1076 goto err_opendata_put;
c6d00e63 1077 nfs4_opendata_put(opendata);
1da177e4
LT		 1078 nfs4_put_state_owner(sp);
1079 up_read(&clp->cl_sem);
1080 *res = state;
1081 return 0;
c6d00e63
TM		 1082err_opendata_put:
1083 nfs4_opendata_put(opendata);
76723de0
TM		 1084err_release_rwsem:
1085 up_read(&clp->cl_sem);
e56e0b78
TM		 1086err_put_state_owner:
1087 nfs4_put_state_owner(sp);
1da177e4 1088out_err:
1da177e4
LT		 1089 *res = NULL;
1090 return status;
1091}
1092
1093
ad389da7 1094static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1095{
1096 struct nfs4_exception exception = { };
1097 struct nfs4_state *res;
1098 int status;
1099
1100 do {
ad389da7 1101 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1da177e4
LT		 1102 if (status == 0)
1103 break;
1104 /* NOTE: BAD_SEQID means the server and client disagree about the
1105 * book-keeping w.r.t. state-changing operations
1106 * (OPEN/CLOSE/LOCK/LOCKU...)
1107 * It is actually a sign of a bug on the client or on the server.
1108 *
1109 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1110 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1111 * have unhashed the old state_owner for us, and that we can
1112 * therefore safely retry using a new one. We should still warn
1113 * the user though...
1114 */
1115 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1116 printk(KERN_WARNING "NFS: v4 server %s "
1117 " returned a bad sequence-id error!\n",
1118 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1119 exception.retry = 1;
1120 continue;
1121 }
550f5747
TM		 1122 /*
1123 * BAD_STATEID on OPEN means that the server cancelled our
1124 * state before it received the OPEN_CONFIRM.
1125 * Recover by retrying the request as per the discussion
1126 * on Page 181 of RFC3530.
1127 */
1128 if (status == -NFS4ERR_BAD_STATEID) {
1129 exception.retry = 1;
1130 continue;
1131 }
aac00a8d
TM		 1132 if (status == -EAGAIN) {
1133 /* We must have found a delegation */
1134 exception.retry = 1;
1135 continue;
1136 }
1da177e4
LT		 1137 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1138 status, &exception));
1139 } while (exception.retry);
1140 return res;
1141}
1142
3e4f6290
TM		 1143static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1144 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1145{
3e4f6290 1146 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1147 struct nfs_setattrargs arg = {
3e4f6290 1148 .fh = NFS_FH(inode),
1da177e4
LT		 1149 .iap = sattr,
1150 .server = server,
1151 .bitmask = server->attr_bitmask,
1152 };
1153 struct nfs_setattrres res = {
1154 .fattr = fattr,
1155 .server = server,
1156 };
1157 struct rpc_message msg = {
1158 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1159 .rpc_argp = &arg,
1160 .rpc_resp = &res,
1161 };
26e976a8 1162 unsigned long timestamp = jiffies;
65e4308d 1163 int status;
1da177e4 1164
0e574af1 1165 nfs_fattr_init(fattr);
1da177e4 1166
3e4f6290
TM		 1167 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1168 /* Use that stateid */
1169 } else if (state != NULL) {
1da177e4 1170 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1171 nfs4_copy_stateid(&arg.stateid, state, current->files);
1172 } else
1da177e4
LT		 1173 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1174
65e4308d 1175 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1176 if (status == 0 && state != NULL)
1177 renew_lease(server, timestamp);
65e4308d 1178 return status;
1da177e4
LT		 1179}
1180
3e4f6290
TM		 1181static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1182 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1183{
3e4f6290 1184 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1185 struct nfs4_exception exception = { };
1186 int err;
1187 do {
1188 err = nfs4_handle_exception(server,
3e4f6290 1189 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1190 &exception);
1191 } while (exception.retry);
1192 return err;
1193}
1194
1195struct nfs4_closedata {
4a35bd41 1196 struct path path;
1da177e4
LT		 1197 struct inode *inode;
1198 struct nfs4_state *state;
1199 struct nfs_closeargs arg;
1200 struct nfs_closeres res;
516a6af6 1201 struct nfs_fattr fattr;
26e976a8 1202 unsigned long timestamp;
1da177e4
LT		 1203};
1204
963d8fe5 1205static void nfs4_free_closedata(void *data)
9512135d 1206{
963d8fe5
TM		 1207 struct nfs4_closedata *calldata = data;
1208 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1209
1210 nfs4_put_open_state(calldata->state);
1211 nfs_free_seqid(calldata->arg.seqid);
9512135d 1212 nfs4_put_state_owner(sp);
4a35bd41
TM		 1213 dput(calldata->path.dentry);
1214 mntput(calldata->path.mnt);
9512135d
TM		 1215 kfree(calldata);
1216}
1217
963d8fe5 1218static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1219{
963d8fe5 1220 struct nfs4_closedata *calldata = data;
1da177e4 1221 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1222 struct nfs_server *server = NFS_SERVER(calldata->inode);
1223
4ce70ada
TM		 1224 if (RPC_ASSASSINATED(task))
1225 return;
1da177e4
LT		 1226 /* hmm. we are done with the inode, and in the process of freeing
1227 * the state_owner. we keep this around to process errors
1228 */
1da177e4
LT		 1229 switch (task->tk_status) {
1230 case 0:
45328c35 1231 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1232 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1233 break;
1234 case -NFS4ERR_STALE_STATEID:
1235 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1236 break;
1237 default:
1238 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1239 rpc_restart_call(task);
1240 return;
1241 }
1242 }
516a6af6 1243 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1244}
1245
4ce70ada 1246static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1247{
4ce70ada 1248 struct nfs4_closedata *calldata = data;
9512135d 1249 struct nfs4_state *state = calldata->state;
003707c7 1250 int clear_rd, clear_wr, clear_rdwr;
9512135d 1251
963d8fe5 1252 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1253 return;
003707c7 1254
003707c7 1255 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1256 spin_lock(&state->owner->so_lock);
003707c7 1257 /* Calculate the change in open mode */
e7616923 1258 if (state->n_rdwr == 0) {
003707c7 1259 if (state->n_rdonly == 0) {
003707c7
TM		 1260 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1261 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1262 }
1263 if (state->n_wronly == 0) {
003707c7
TM		 1264 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1265 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1266 }
e7616923 1267 }
4cecb76f 1268 spin_unlock(&state->owner->so_lock);
003707c7 1269 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1270 /* Note: exit _without_ calling nfs4_close_done */
1271 task->tk_action = NULL;
9512135d
TM		 1272 return;
1273 }
516a6af6 1274 nfs_fattr_init(calldata->res.fattr);
45328c35 1275 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1276 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1277 calldata->arg.open_flags = FMODE_READ;
1278 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1279 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1280 calldata->arg.open_flags = FMODE_WRITE;
1281 }
26e976a8 1282 calldata->timestamp = jiffies;
5138fde0 1283 rpc_call_start(task);
1da177e4
LT		 1284}
1285
963d8fe5 1286static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1287 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1288 .rpc_call_done = nfs4_close_done,
1289 .rpc_release = nfs4_free_closedata,
1290};
1291
1da177e4
LT		 1292/*
1293 * It is possible for data to be read/written from a mem-mapped file
1294 * after the sys_close call (which hits the vfs layer as a flush).
1295 * This means that we can't safely call nfsv4 close on a file until
1296 * the inode is cleared. This in turn means that we are not good
1297 * NFSv4 citizens - we do not indicate to the server to update the file's
1298 * share state even when we are done with one of the three share
1299 * stateid's in the inode.
1300 *
1301 * NOTE: Caller must be holding the sp->so_owner semaphore!
1302 */
a49c3c77 1303int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1304{
4a35bd41 1305 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1306 struct nfs4_closedata *calldata;
b39e625b
TM		 1307 struct nfs4_state_owner *sp = state->owner;
1308 struct rpc_task *task;
5138fde0
TM		 1309 struct rpc_message msg = {
1310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1311 .rpc_cred = state->owner->so_cred,
1312 };
c970aa85
TM		 1313 struct rpc_task_setup task_setup_data = {
1314 .rpc_client = server->client,
5138fde0 1315 .rpc_message = &msg,
c970aa85 1316 .callback_ops = &nfs4_close_ops,
101070ca 1317 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1318 .flags = RPC_TASK_ASYNC,
1319 };
9512135d 1320 int status = -ENOMEM;
1da177e4 1321
9512135d 1322 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1323 if (calldata == NULL)
9512135d 1324 goto out;
4a35bd41 1325 calldata->inode = state->inode;
1da177e4 1326 calldata->state = state;
4a35bd41 1327 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1328 calldata->arg.stateid = &state->open_stateid;
1da177e4 1329 /* Serialization for the sequence id */
cee54fc9 1330 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1331 if (calldata->arg.seqid == NULL)
1332 goto out_free_calldata;
516a6af6
TM		 1333 calldata->arg.bitmask = server->attr_bitmask;
1334 calldata->res.fattr = &calldata->fattr;
c1d51931 1335 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1336 calldata->res.server = server;
4a35bd41
TM		 1337 calldata->path.mnt = mntget(path->mnt);
1338 calldata->path.dentry = dget(path->dentry);
9512135d 1339
5138fde0
TM		 1340 msg.rpc_argp = &calldata->arg,
1341 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1342 task_setup_data.callback_data = calldata;
1343 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1344 if (IS_ERR(task))
1345 return PTR_ERR(task);
a49c3c77
TM		 1346 status = 0;
1347 if (wait)
1348 status = rpc_wait_for_completion_task(task);
b39e625b 1349 rpc_put_task(task);
a49c3c77 1350 return status;
9512135d
TM		 1351out_free_calldata:
1352 kfree(calldata);
1353out:
b39e625b
TM		 1354 nfs4_put_open_state(state);
1355 nfs4_put_state_owner(sp);
9512135d 1356 return status;
1da177e4
LT		 1357}
1358
4a35bd41 1359static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM		 1360{
1361 struct file *filp;
1b45c46c 1362 int ret;
02a913a7 1363
1b45c46c
TM		 1364 /* If the open_intent is for execute, we have an extra check to make */
1365 if (nd->intent.open.flags & FMODE_EXEC) {
af22f94a 1366 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1367 state->owner->so_cred,
1368 nd->intent.open.flags);
1369 if (ret < 0)
1370 goto out_close;
1371 }
4a35bd41 1372 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1373 if (!IS_ERR(filp)) {
1374 struct nfs_open_context *ctx;
cd3758e3 1375 ctx = nfs_file_open_context(filp);
02a913a7 1376 ctx->state = state;
95cf959b
TM		 1377 return 0;
1378 }
1b45c46c
TM		 1379 ret = PTR_ERR(filp);
1380out_close:
a49c3c77 1381 nfs4_close_sync(path, state, nd->intent.open.flags);
1b45c46c 1382 return ret;
02a913a7
TM		 1383}
1384
1385struct dentry *
1da177e4
LT		 1386nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1387{
ad389da7 1388 struct path path = {
4ac91378 1389 .mnt = nd->path.mnt,
ad389da7
TM		 1390 .dentry = dentry,
1391 };
4ac91378 1392 struct dentry *parent;
1da177e4
LT		 1393 struct iattr attr;
1394 struct rpc_cred *cred;
1395 struct nfs4_state *state;
02a913a7 1396 struct dentry *res;
1da177e4
LT		 1397
1398 if (nd->flags & LOOKUP_CREATE) {
1399 attr.ia_mode = nd->intent.open.create_mode;
1400 attr.ia_valid = ATTR_MODE;
1401 if (!IS_POSIXACL(dir))
1402 attr.ia_mode &= ~current->fs->umask;
1403 } else {
1404 attr.ia_valid = 0;
1405 BUG_ON(nd->intent.open.flags & O_CREAT);
1406 }
1407
98a8e323 1408 cred = rpc_lookup_cred();
1da177e4 1409 if (IS_ERR(cred))
02a913a7 1410 return (struct dentry *)cred;
565277f6
TM		 1411 parent = dentry->d_parent;
1412 /* Protect against concurrent sillydeletes */
1413 nfs_block_sillyrename(parent);
ad389da7 1414 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1415 put_rpccred(cred);
02a913a7 1416 if (IS_ERR(state)) {
d75340cc 1417 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1418 d_add(dentry, NULL);
d75340cc
TM		 1419 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1420 }
565277f6 1421 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1422 return (struct dentry *)state;
1423 }
24ac23ab 1424 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1425 if (res != NULL)
deee9369 1426 path.dentry = res;
d75340cc 1427 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1428 nfs_unblock_sillyrename(parent);
4a35bd41 1429 nfs4_intent_set_file(nd, &path, state);
02a913a7 1430 return res;
1da177e4
LT		 1431}
1432
1433int
02a913a7 1434nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1435{
ad389da7 1436 struct path path = {
4ac91378 1437 .mnt = nd->path.mnt,
ad389da7
TM		 1438 .dentry = dentry,
1439 };
1da177e4
LT		 1440 struct rpc_cred *cred;
1441 struct nfs4_state *state;
1da177e4 1442
98a8e323 1443 cred = rpc_lookup_cred();
1da177e4
LT		 1444 if (IS_ERR(cred))
1445 return PTR_ERR(cred);
aac00a8d 1446 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1447 put_rpccred(cred);
02a913a7
TM		 1448 if (IS_ERR(state)) {
1449 switch (PTR_ERR(state)) {
1450 case -EPERM:
1451 case -EACCES:
1452 case -EDQUOT:
1453 case -ENOSPC:
1454 case -EROFS:
1455 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1456 return 1;
b87c0adf
CL		 1457 default:
1458 goto out_drop;
02a913a7 1459 }
02a913a7 1460 }
24ac23ab 1461 if (state->inode == dentry->d_inode) {
d75340cc 1462 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
4a35bd41 1463 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1464 return 1;
1465 }
a49c3c77 1466 nfs4_close_sync(&path, state, openflags);
02a913a7
TM		 1467out_drop:
1468 d_drop(dentry);
1da177e4
LT		 1469 return 0;
1470}
1471
1472
1473static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1474{
1475 struct nfs4_server_caps_res res = {};
1476 struct rpc_message msg = {
1477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1478 .rpc_argp = fhandle,
1479 .rpc_resp = &res,
1480 };
1481 int status;
1482
1483 status = rpc_call_sync(server->client, &msg, 0);
1484 if (status == 0) {
1485 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1486 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1487 server->caps |= NFS_CAP_ACLS;
1488 if (res.has_links != 0)
1489 server->caps |= NFS_CAP_HARDLINKS;
1490 if (res.has_symlinks != 0)
1491 server->caps |= NFS_CAP_SYMLINKS;
1492 server->acl_bitmask = res.acl_bitmask;
1493 }
1494 return status;
1495}
1496
55a97593 1497int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1498{
1499 struct nfs4_exception exception = { };
1500 int err;
1501 do {
1502 err = nfs4_handle_exception(server,
1503 _nfs4_server_capabilities(server, fhandle),
1504 &exception);
1505 } while (exception.retry);
1506 return err;
1507}
1508
1509static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1510 struct nfs_fsinfo *info)
1511{
1da177e4
LT		 1512 struct nfs4_lookup_root_arg args = {
1513 .bitmask = nfs4_fattr_bitmap,
1514 };
1515 struct nfs4_lookup_res res = {
1516 .server = server,
0e574af1 1517 .fattr = info->fattr,
1da177e4
LT		 1518 .fh = fhandle,
1519 };
1520 struct rpc_message msg = {
1521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1522 .rpc_argp = &args,
1523 .rpc_resp = &res,
1524 };
0e574af1 1525 nfs_fattr_init(info->fattr);
1da177e4
LT		 1526 return rpc_call_sync(server->client, &msg, 0);
1527}
1528
1529static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1530 struct nfs_fsinfo *info)
1531{
1532 struct nfs4_exception exception = { };
1533 int err;
1534 do {
1535 err = nfs4_handle_exception(server,
1536 _nfs4_lookup_root(server, fhandle, info),
1537 &exception);
1538 } while (exception.retry);
1539 return err;
1540}
1541
54ceac45
DH		 1542/*
1543 * get the file handle for the "/" directory on the server
1544 */
1da177e4 1545static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1546 struct nfs_fsinfo *info)
1da177e4 1547{
1da177e4
LT		 1548 int status;
1549
1da177e4 1550 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1551 if (status == 0)
1552 status = nfs4_server_capabilities(server, fhandle);
1553 if (status == 0)
1554 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1555 return nfs4_map_errors(status);
1da177e4
LT		 1556}
1557
6b97fd3d
MN		 1558/*
1559 * Get locations and (maybe) other attributes of a referral.
1560 * Note that we'll actually follow the referral later when
1561 * we detect fsid mismatch in inode revalidation
1562 */
56659e99 1563static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1564{
1565 int status = -ENOMEM;
1566 struct page *page = NULL;
1567 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1568
1569 page = alloc_page(GFP_KERNEL);
1570 if (page == NULL)
1571 goto out;
1572 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1573 if (locations == NULL)
1574 goto out;
1575
c228fd3a 1576 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1577 if (status != 0)
1578 goto out;
1579 /* Make sure server returned a different fsid for the referral */
1580 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1581 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1582 status = -EIO;
1583 goto out;
1584 }
1585
1586 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1587 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1588 if (!fattr->mode)
1589 fattr->mode = S_IFDIR;
1590 memset(fhandle, 0, sizeof(struct nfs_fh));
1591out:
1592 if (page)
1593 __free_page(page);
1594 if (locations)
1595 kfree(locations);
1596 return status;
1597}
1598
1da177e4
LT		 1599static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1600{
1601 struct nfs4_getattr_arg args = {
1602 .fh = fhandle,
1603 .bitmask = server->attr_bitmask,
1604 };
1605 struct nfs4_getattr_res res = {
1606 .fattr = fattr,
1607 .server = server,
1608 };
1609 struct rpc_message msg = {
1610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1611 .rpc_argp = &args,
1612 .rpc_resp = &res,
1613 };
1614
0e574af1 1615 nfs_fattr_init(fattr);
1da177e4
LT		 1616 return rpc_call_sync(server->client, &msg, 0);
1617}
1618
1619static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1620{
1621 struct nfs4_exception exception = { };
1622 int err;
1623 do {
1624 err = nfs4_handle_exception(server,
1625 _nfs4_proc_getattr(server, fhandle, fattr),
1626 &exception);
1627 } while (exception.retry);
1628 return err;
1629}
1630
1631/*
1632 * The file is not closed if it is opened due to the a request to change
1633 * the size of the file. The open call will not be needed once the
1634 * VFS layer lookup-intents are implemented.
1635 *
1636 * Close is called when the inode is destroyed.
1637 * If we haven't opened the file for O_WRONLY, we
1638 * need to in the size_change case to obtain a stateid.
1639 *
1640 * Got race?
1641 * Because OPEN is always done by name in nfsv4, it is
1642 * possible that we opened a different file by the same
1643 * name. We can recognize this race condition, but we
1644 * can't do anything about it besides returning an error.
1645 *
1646 * This will be fixed with VFS changes (lookup-intent).
1647 */
1648static int
1649nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1650 struct iattr *sattr)
1651{
08e9eac4
TM		 1652 struct rpc_cred *cred;
1653 struct inode *inode = dentry->d_inode;
d530838b
TM		 1654 struct nfs_open_context *ctx;
1655 struct nfs4_state *state = NULL;
1da177e4
LT		 1656 int status;
1657
0e574af1 1658 nfs_fattr_init(fattr);
1da177e4 1659
98a8e323 1660 cred = rpc_lookup_cred();
08e9eac4
TM		 1661 if (IS_ERR(cred))
1662 return PTR_ERR(cred);
d530838b
TM		 1663
1664 /* Search for an existing open(O_WRITE) file */
1665 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1666 if (ctx != NULL)
1667 state = ctx->state;
08e9eac4 1668
3e4f6290 1669 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1670 if (status == 0)
1671 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1672 if (ctx != NULL)
1673 put_nfs_open_context(ctx);
08e9eac4 1674 put_rpccred(cred);
1da177e4
LT		 1675 return status;
1676}
1677
56659e99
TM		 1678static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1679 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1680 struct nfs_fattr *fattr)
1681{
1682 int status;
1683 struct nfs4_lookup_arg args = {
1684 .bitmask = server->attr_bitmask,
1685 .dir_fh = dirfh,
1686 .name = name,
1687 };
1688 struct nfs4_lookup_res res = {
1689 .server = server,
1690 .fattr = fattr,
1691 .fh = fhandle,
1692 };
1693 struct rpc_message msg = {
1694 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1695 .rpc_argp = &args,
1696 .rpc_resp = &res,
1697 };
1698
1699 nfs_fattr_init(fattr);
1700
1701 dprintk("NFS call lookupfh %s\n", name->name);
1702 status = rpc_call_sync(server->client, &msg, 0);
1703 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1704 return status;
1705}
1706
1707static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1708 struct qstr *name, struct nfs_fh *fhandle,
1709 struct nfs_fattr *fattr)
1710{
1711 struct nfs4_exception exception = { };
1712 int err;
1713 do {
4e56e082
TM		 1714 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1715 /* FIXME: !!!! */
1716 if (err == -NFS4ERR_MOVED) {
1717 err = -EREMOTE;
1718 break;
1719 }
1720 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1721 } while (exception.retry);
1722 return err;
1723}
1724
56659e99 1725static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1726 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1727{
4e56e082 1728 int status;
1da177e4
LT		 1729
1730 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1731 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1732 if (status == -NFS4ERR_MOVED)
1733 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1734 dprintk("NFS reply lookup: %d\n", status);
1735 return status;
1736}
1737
1738static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1739{
1740 struct nfs4_exception exception = { };
1741 int err;
1742 do {
1743 err = nfs4_handle_exception(NFS_SERVER(dir),
1744 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1745 &exception);
1746 } while (exception.retry);
1747 return err;
1748}
1749
1750static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1751{
76b32999
TM		 1752 struct nfs_server *server = NFS_SERVER(inode);
1753 struct nfs_fattr fattr;
1da177e4
LT		 1754 struct nfs4_accessargs args = {
1755 .fh = NFS_FH(inode),
76b32999
TM		 1756 .bitmask = server->attr_bitmask,
1757 };
1758 struct nfs4_accessres res = {
1759 .server = server,
1760 .fattr = &fattr,
1da177e4 1761 };
1da177e4
LT		 1762 struct rpc_message msg = {
1763 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1764 .rpc_argp = &args,
1765 .rpc_resp = &res,
1766 .rpc_cred = entry->cred,
1767 };
1768 int mode = entry->mask;
1769 int status;
1770
1771 /*
1772 * Determine which access bits we want to ask for...
1773 */
1774 if (mode & MAY_READ)
1775 args.access |= NFS4_ACCESS_READ;
1776 if (S_ISDIR(inode->i_mode)) {
1777 if (mode & MAY_WRITE)
1778 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1779 if (mode & MAY_EXEC)
1780 args.access |= NFS4_ACCESS_LOOKUP;
1781 } else {
1782 if (mode & MAY_WRITE)
1783 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1784 if (mode & MAY_EXEC)
1785 args.access |= NFS4_ACCESS_EXECUTE;
1786 }
76b32999 1787 nfs_fattr_init(&fattr);
1da177e4
LT		 1788 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1789 if (!status) {
1790 entry->mask = 0;
1791 if (res.access & NFS4_ACCESS_READ)
1792 entry->mask |= MAY_READ;
1793 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1794 entry->mask |= MAY_WRITE;
1795 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1796 entry->mask |= MAY_EXEC;
76b32999 1797 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1798 }
1799 return status;
1800}
1801
1802static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1803{
1804 struct nfs4_exception exception = { };
1805 int err;
1806 do {
1807 err = nfs4_handle_exception(NFS_SERVER(inode),
1808 _nfs4_proc_access(inode, entry),
1809 &exception);
1810 } while (exception.retry);
1811 return err;
1812}
1813
1814/*
1815 * TODO: For the time being, we don't try to get any attributes
1816 * along with any of the zero-copy operations READ, READDIR,
1817 * READLINK, WRITE.
1818 *
1819 * In the case of the first three, we want to put the GETATTR
1820 * after the read-type operation -- this is because it is hard
1821 * to predict the length of a GETATTR response in v4, and thus
1822 * align the READ data correctly. This means that the GETATTR
1823 * may end up partially falling into the page cache, and we should
1824 * shift it into the 'tail' of the xdr_buf before processing.
1825 * To do this efficiently, we need to know the total length
1826 * of data received, which doesn't seem to be available outside
1827 * of the RPC layer.
1828 *
1829 * In the case of WRITE, we also want to put the GETATTR after
1830 * the operation -- in this case because we want to make sure
1831 * we get the post-operation mtime and size. This means that
1832 * we can't use xdr_encode_pages() as written: we need a variant
1833 * of it which would leave room in the 'tail' iovec.
1834 *
1835 * Both of these changes to the XDR layer would in fact be quite
1836 * minor, but I decided to leave them for a subsequent patch.
1837 */
1838static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1839 unsigned int pgbase, unsigned int pglen)
1840{
1841 struct nfs4_readlink args = {
1842 .fh = NFS_FH(inode),
1843 .pgbase = pgbase,
1844 .pglen = pglen,
1845 .pages = &page,
1846 };
1847 struct rpc_message msg = {
1848 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1849 .rpc_argp = &args,
1850 .rpc_resp = NULL,
1851 };
1852
1853 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1854}
1855
1856static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1857 unsigned int pgbase, unsigned int pglen)
1858{
1859 struct nfs4_exception exception = { };
1860 int err;
1861 do {
1862 err = nfs4_handle_exception(NFS_SERVER(inode),
1863 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1864 &exception);
1865 } while (exception.retry);
1866 return err;
1867}
1868
1da177e4
LT		 1869/*
1870 * Got race?
1871 * We will need to arrange for the VFS layer to provide an atomic open.
1872 * Until then, this create/open method is prone to inefficiency and race
1873 * conditions due to the lookup, create, and open VFS calls from sys_open()
1874 * placed on the wire.
1875 *
1876 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1877 * The file will be opened again in the subsequent VFS open call
1878 * (nfs4_proc_file_open).
1879 *
1880 * The open for read will just hang around to be used by any process that
1881 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1882 */
1883
1884static int
1885nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1886 int flags, struct nameidata *nd)
1da177e4 1887{
ad389da7 1888 struct path path = {
4ac91378 1889 .mnt = nd->path.mnt,
ad389da7
TM		 1890 .dentry = dentry,
1891 };
1da177e4
LT		 1892 struct nfs4_state *state;
1893 struct rpc_cred *cred;
1894 int status = 0;
1895
98a8e323 1896 cred = rpc_lookup_cred();
1da177e4
LT		 1897 if (IS_ERR(cred)) {
1898 status = PTR_ERR(cred);
1899 goto out;
1900 }
ad389da7 1901 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1da177e4 1902 put_rpccred(cred);
d4d9cdcb 1903 d_drop(dentry);
1da177e4
LT		 1904 if (IS_ERR(state)) {
1905 status = PTR_ERR(state);
1906 goto out;
1907 }
d4d9cdcb 1908 d_add(dentry, igrab(state->inode));
d75340cc 1909 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 1910 if (flags & O_EXCL) {
1911 struct nfs_fattr fattr;
3e4f6290 1912 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1913 if (status == 0)
65e4308d 1914 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 1915 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 1916 }
ad389da7 1917 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
4a35bd41 1918 status = nfs4_intent_set_file(nd, &path, state);
02a913a7 1919 else
a49c3c77 1920 nfs4_close_sync(&path, state, flags);
1da177e4
LT		 1921out:
1922 return status;
1923}
1924
1925static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1926{
16e42959 1927 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 1928 struct nfs_removeargs args = {
1da177e4 1929 .fh = NFS_FH(dir),
4fdc17b2
TM		 1930 .name.len = name->len,
1931 .name.name = name->name,
16e42959
TM		 1932 .bitmask = server->attr_bitmask,
1933 };
4fdc17b2 1934 struct nfs_removeres res = {
16e42959 1935 .server = server,
1da177e4 1936 };
1da177e4 1937 struct rpc_message msg = {
4fdc17b2
TM		 1938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1939 .rpc_argp = &args,
1940 .rpc_resp = &res,
1da177e4
LT		 1941 };
1942 int status;
1943
4fdc17b2 1944 nfs_fattr_init(&res.dir_attr);
16e42959
TM		 1945 status = rpc_call_sync(server->client, &msg, 0);
1946 if (status == 0) {
1947 update_changeattr(dir, &res.cinfo);
4fdc17b2 1948 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 1949 }
1da177e4
LT		 1950 return status;
1951}
1952
1953static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1954{
1955 struct nfs4_exception exception = { };
1956 int err;
1957 do {
1958 err = nfs4_handle_exception(NFS_SERVER(dir),
1959 _nfs4_proc_remove(dir, name),
1960 &exception);
1961 } while (exception.retry);
1962 return err;
1963}
1964
e4eff1a6 1965static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 1966{
e4eff1a6
TM		 1967 struct nfs_server *server = NFS_SERVER(dir);
1968 struct nfs_removeargs *args = msg->rpc_argp;
1969 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 1970
e4eff1a6
TM		 1971 args->bitmask = server->attr_bitmask;
1972 res->server = server;
1da177e4 1973 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 1974}
1975
e4eff1a6 1976static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 1977{
e4eff1a6
TM		 1978 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1979
1980 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1981 return 0;
1982 update_changeattr(dir, &res->cinfo);
1983 nfs_post_op_update_inode(dir, &res->dir_attr);
1984 return 1;
1da177e4
LT		 1985}
1986
1987static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1988 struct inode *new_dir, struct qstr *new_name)
1989{
6caf2c82 1990 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1991 struct nfs4_rename_arg arg = {
1992 .old_dir = NFS_FH(old_dir),
1993 .new_dir = NFS_FH(new_dir),
1994 .old_name = old_name,
1995 .new_name = new_name,
6caf2c82
TM		 1996 .bitmask = server->attr_bitmask,
1997 };
1998 struct nfs_fattr old_fattr, new_fattr;
1999 struct nfs4_rename_res res = {
2000 .server = server,
2001 .old_fattr = &old_fattr,
2002 .new_fattr = &new_fattr,
1da177e4 2003 };
1da177e4
LT		 2004 struct rpc_message msg = {
2005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2006 .rpc_argp = &arg,
2007 .rpc_resp = &res,
2008 };
2009 int status;
2010
6caf2c82
TM		 2011 nfs_fattr_init(res.old_fattr);
2012 nfs_fattr_init(res.new_fattr);
2013 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2014
2015 if (!status) {
2016 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2017 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2018 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2019 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2020 }
2021 return status;
2022}
2023
2024static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2025 struct inode *new_dir, struct qstr *new_name)
2026{
2027 struct nfs4_exception exception = { };
2028 int err;
2029 do {
2030 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2031 _nfs4_proc_rename(old_dir, old_name,
2032 new_dir, new_name),
2033 &exception);
2034 } while (exception.retry);
2035 return err;
2036}
2037
2038static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2039{
91ba2eee 2040 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2041 struct nfs4_link_arg arg = {
2042 .fh = NFS_FH(inode),
2043 .dir_fh = NFS_FH(dir),
2044 .name = name,
91ba2eee
TM		 2045 .bitmask = server->attr_bitmask,
2046 };
2047 struct nfs_fattr fattr, dir_attr;
2048 struct nfs4_link_res res = {
2049 .server = server,
2050 .fattr = &fattr,
2051 .dir_attr = &dir_attr,
1da177e4 2052 };
1da177e4
LT		 2053 struct rpc_message msg = {
2054 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2055 .rpc_argp = &arg,
91ba2eee 2056 .rpc_resp = &res,
1da177e4
LT		 2057 };
2058 int status;
2059
91ba2eee
TM		 2060 nfs_fattr_init(res.fattr);
2061 nfs_fattr_init(res.dir_attr);
2062 status = rpc_call_sync(server->client, &msg, 0);
2063 if (!status) {
2064 update_changeattr(dir, &res.cinfo);
2065 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2066 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2067 }
1da177e4
LT		 2068
2069 return status;
2070}
2071
2072static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2073{
2074 struct nfs4_exception exception = { };
2075 int err;
2076 do {
2077 err = nfs4_handle_exception(NFS_SERVER(inode),
2078 _nfs4_proc_link(inode, dir, name),
2079 &exception);
2080 } while (exception.retry);
2081 return err;
2082}
2083
4f390c15 2084static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2085 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2086{
2087 struct nfs_server *server = NFS_SERVER(dir);
4f390c15
CL		 2088 struct nfs_fh fhandle;
2089 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2090 struct nfs4_create_arg arg = {
2091 .dir_fh = NFS_FH(dir),
2092 .server = server,
4f390c15 2093 .name = &dentry->d_name,
1da177e4
LT		 2094 .attrs = sattr,
2095 .ftype = NF4LNK,
2096 .bitmask = server->attr_bitmask,
2097 };
2098 struct nfs4_create_res res = {
2099 .server = server,
4f390c15
CL		 2100 .fh = &fhandle,
2101 .fattr = &fattr,
56ae19f3 2102 .dir_fattr = &dir_fattr,
1da177e4
LT		 2103 };
2104 struct rpc_message msg = {
2105 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2106 .rpc_argp = &arg,
2107 .rpc_resp = &res,
2108 };
2109 int status;
2110
94a6d753 2111 if (len > NFS4_MAXPATHLEN)
1da177e4 2112 return -ENAMETOOLONG;
4f390c15 2113
94a6d753
CL		 2114 arg.u.symlink.pages = &page;
2115 arg.u.symlink.len = len;
4f390c15 2116 nfs_fattr_init(&fattr);
56ae19f3 2117 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2118
2119 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
4f390c15 2120 if (!status) {
1da177e4 2121 update_changeattr(dir, &res.dir_cinfo);
4f390c15
CL		 2122 nfs_post_op_update_inode(dir, res.dir_fattr);
2123 status = nfs_instantiate(dentry, &fhandle, &fattr);
2124 }
1da177e4
LT		 2125 return status;
2126}
2127
4f390c15 2128static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2129 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2130{
2131 struct nfs4_exception exception = { };
2132 int err;
2133 do {
2134 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2135 _nfs4_proc_symlink(dir, dentry, page,
2136 len, sattr),
1da177e4
LT		 2137 &exception);
2138 } while (exception.retry);
2139 return err;
2140}
2141
2142static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2143 struct iattr *sattr)
2144{
2145 struct nfs_server *server = NFS_SERVER(dir);
2146 struct nfs_fh fhandle;
56ae19f3 2147 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2148 struct nfs4_create_arg arg = {
2149 .dir_fh = NFS_FH(dir),
2150 .server = server,
2151 .name = &dentry->d_name,
2152 .attrs = sattr,
2153 .ftype = NF4DIR,
2154 .bitmask = server->attr_bitmask,
2155 };
2156 struct nfs4_create_res res = {
2157 .server = server,
2158 .fh = &fhandle,
2159 .fattr = &fattr,
56ae19f3 2160 .dir_fattr = &dir_fattr,
1da177e4
LT		 2161 };
2162 struct rpc_message msg = {
2163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2164 .rpc_argp = &arg,
2165 .rpc_resp = &res,
2166 };
2167 int status;
2168
0e574af1 2169 nfs_fattr_init(&fattr);
56ae19f3 2170 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2171
2172 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2173 if (!status) {
2174 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2175 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2176 status = nfs_instantiate(dentry, &fhandle, &fattr);
2177 }
2178 return status;
2179}
2180
2181static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2182 struct iattr *sattr)
2183{
2184 struct nfs4_exception exception = { };
2185 int err;
2186 do {
2187 err = nfs4_handle_exception(NFS_SERVER(dir),
2188 _nfs4_proc_mkdir(dir, dentry, sattr),
2189 &exception);
2190 } while (exception.retry);
2191 return err;
2192}
2193
2194static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2195 u64 cookie, struct page *page, unsigned int count, int plus)
2196{
2197 struct inode *dir = dentry->d_inode;
2198 struct nfs4_readdir_arg args = {
2199 .fh = NFS_FH(dir),
2200 .pages = &page,
2201 .pgbase = 0,
2202 .count = count,
2203 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2204 };
2205 struct nfs4_readdir_res res;
2206 struct rpc_message msg = {
2207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2208 .rpc_argp = &args,
2209 .rpc_resp = &res,
2210 .rpc_cred = cred,
2211 };
2212 int status;
2213
eadf4598
TM		 2214 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2215 dentry->d_parent->d_name.name,
2216 dentry->d_name.name,
2217 (unsigned long long)cookie);
1da177e4
LT		 2218 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2219 res.pgbase = args.pgbase;
2220 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2221 if (status == 0)
2222 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2223
2224 nfs_invalidate_atime(dir);
2225
eadf4598 2226 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2227 return status;
2228}
2229
2230static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2231 u64 cookie, struct page *page, unsigned int count, int plus)
2232{
2233 struct nfs4_exception exception = { };
2234 int err;
2235 do {
2236 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2237 _nfs4_proc_readdir(dentry, cred, cookie,
2238 page, count, plus),
2239 &exception);
2240 } while (exception.retry);
2241 return err;
2242}
2243
2244static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2245 struct iattr *sattr, dev_t rdev)
2246{
2247 struct nfs_server *server = NFS_SERVER(dir);
2248 struct nfs_fh fh;
56ae19f3 2249 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2250 struct nfs4_create_arg arg = {
2251 .dir_fh = NFS_FH(dir),
2252 .server = server,
2253 .name = &dentry->d_name,
2254 .attrs = sattr,
2255 .bitmask = server->attr_bitmask,
2256 };
2257 struct nfs4_create_res res = {
2258 .server = server,
2259 .fh = &fh,
2260 .fattr = &fattr,
56ae19f3 2261 .dir_fattr = &dir_fattr,
1da177e4
LT		 2262 };
2263 struct rpc_message msg = {
2264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2265 .rpc_argp = &arg,
2266 .rpc_resp = &res,
2267 };
2268 int status;
2269 int mode = sattr->ia_mode;
2270
0e574af1 2271 nfs_fattr_init(&fattr);
56ae19f3 2272 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2273
2274 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2275 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2276 if (S_ISFIFO(mode))
2277 arg.ftype = NF4FIFO;
2278 else if (S_ISBLK(mode)) {
2279 arg.ftype = NF4BLK;
2280 arg.u.device.specdata1 = MAJOR(rdev);
2281 arg.u.device.specdata2 = MINOR(rdev);
2282 }
2283 else if (S_ISCHR(mode)) {
2284 arg.ftype = NF4CHR;
2285 arg.u.device.specdata1 = MAJOR(rdev);
2286 arg.u.device.specdata2 = MINOR(rdev);
2287 }
2288 else
2289 arg.ftype = NF4SOCK;
2290
2291 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2292 if (status == 0) {
2293 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2294 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2295 status = nfs_instantiate(dentry, &fh, &fattr);
2296 }
2297 return status;
2298}
2299
2300static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2301 struct iattr *sattr, dev_t rdev)
2302{
2303 struct nfs4_exception exception = { };
2304 int err;
2305 do {
2306 err = nfs4_handle_exception(NFS_SERVER(dir),
2307 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2308 &exception);
2309 } while (exception.retry);
2310 return err;
2311}
2312
2313static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2314 struct nfs_fsstat *fsstat)
2315{
2316 struct nfs4_statfs_arg args = {
2317 .fh = fhandle,
2318 .bitmask = server->attr_bitmask,
2319 };
2320 struct rpc_message msg = {
2321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2322 .rpc_argp = &args,
2323 .rpc_resp = fsstat,
2324 };
2325
0e574af1 2326 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2327 return rpc_call_sync(server->client, &msg, 0);
2328}
2329
2330static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2331{
2332 struct nfs4_exception exception = { };
2333 int err;
2334 do {
2335 err = nfs4_handle_exception(server,
2336 _nfs4_proc_statfs(server, fhandle, fsstat),
2337 &exception);
2338 } while (exception.retry);
2339 return err;
2340}
2341
2342static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2343 struct nfs_fsinfo *fsinfo)
2344{
2345 struct nfs4_fsinfo_arg args = {
2346 .fh = fhandle,
2347 .bitmask = server->attr_bitmask,
2348 };
2349 struct rpc_message msg = {
2350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2351 .rpc_argp = &args,
2352 .rpc_resp = fsinfo,
2353 };
2354
2355 return rpc_call_sync(server->client, &msg, 0);
2356}
2357
2358static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2359{
2360 struct nfs4_exception exception = { };
2361 int err;
2362
2363 do {
2364 err = nfs4_handle_exception(server,
2365 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2366 &exception);
2367 } while (exception.retry);
2368 return err;
2369}
2370
2371static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2372{
0e574af1 2373 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2374 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2375}
2376
2377static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2378 struct nfs_pathconf *pathconf)
2379{
2380 struct nfs4_pathconf_arg args = {
2381 .fh = fhandle,
2382 .bitmask = server->attr_bitmask,
2383 };
2384 struct rpc_message msg = {
2385 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2386 .rpc_argp = &args,
2387 .rpc_resp = pathconf,
2388 };
2389
2390 /* None of the pathconf attributes are mandatory to implement */
2391 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2392 memset(pathconf, 0, sizeof(*pathconf));
2393 return 0;
2394 }
2395
0e574af1 2396 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2397 return rpc_call_sync(server->client, &msg, 0);
2398}
2399
2400static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2401 struct nfs_pathconf *pathconf)
2402{
2403 struct nfs4_exception exception = { };
2404 int err;
2405
2406 do {
2407 err = nfs4_handle_exception(server,
2408 _nfs4_proc_pathconf(server, fhandle, pathconf),
2409 &exception);
2410 } while (exception.retry);
2411 return err;
2412}
2413
ec06c096 2414static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2415{
ec06c096 2416 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2417
ec06c096 2418 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2419 rpc_restart_call(task);
ec06c096 2420 return -EAGAIN;
1da177e4 2421 }
8850df99
TM		 2422
2423 nfs_invalidate_atime(data->inode);
1da177e4 2424 if (task->tk_status > 0)
ec06c096
TM		 2425 renew_lease(server, data->timestamp);
2426 return 0;
1da177e4
LT		 2427}
2428
bdc7f021 2429static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2430{
1da177e4 2431 data->timestamp = jiffies;
bdc7f021 2432 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2433}
2434
788e7a89 2435static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2436{
1da177e4
LT		 2437 struct inode *inode = data->inode;
2438
2439 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2440 rpc_restart_call(task);
788e7a89 2441 return -EAGAIN;
1da177e4 2442 }
4f9838c7 2443 if (task->tk_status >= 0) {
1da177e4 2444 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2445 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2446 }
788e7a89 2447 return 0;
1da177e4
LT		 2448}
2449
bdc7f021 2450static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2451{
bdc7f021
TM		 2452 struct nfs_server *server = NFS_SERVER(data->inode);
2453
4f9838c7
TM		 2454 data->args.bitmask = server->attr_bitmask;
2455 data->res.server = server;
1da177e4
LT		 2456 data->timestamp = jiffies;
2457
bdc7f021 2458 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2459}
2460
788e7a89 2461static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2462{
1da177e4
LT		 2463 struct inode *inode = data->inode;
2464
2465 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2466 rpc_restart_call(task);
788e7a89 2467 return -EAGAIN;
1da177e4 2468 }
9e08a3c5 2469 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2470 return 0;
1da177e4
LT		 2471}
2472
bdc7f021 2473static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2474{
788e7a89 2475 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2476
4f9838c7
TM		 2477 data->args.bitmask = server->attr_bitmask;
2478 data->res.server = server;
bdc7f021 2479 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2480}
2481
2482/*
2483 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2484 * standalone procedure for queueing an asynchronous RENEW.
2485 */
963d8fe5 2486static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2487{
adfa6f98 2488 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2489 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2490
2491 if (task->tk_status < 0) {
2492 switch (task->tk_status) {
2493 case -NFS4ERR_STALE_CLIENTID:
2494 case -NFS4ERR_EXPIRED:
2495 case -NFS4ERR_CB_PATH_DOWN:
2496 nfs4_schedule_state_recovery(clp);
2497 }
2498 return;
2499 }
2500 spin_lock(&clp->cl_lock);
2501 if (time_before(clp->cl_last_renewal,timestamp))
2502 clp->cl_last_renewal = timestamp;
2503 spin_unlock(&clp->cl_lock);
2504}
2505
963d8fe5
TM		 2506static const struct rpc_call_ops nfs4_renew_ops = {
2507 .rpc_call_done = nfs4_renew_done,
2508};
2509
adfa6f98 2510int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2511{
2512 struct rpc_message msg = {
2513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2514 .rpc_argp = clp,
b4454fe1 2515 .rpc_cred = cred,
1da177e4
LT		 2516 };
2517
2518 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2519 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2520}
2521
adfa6f98 2522int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2523{
2524 struct rpc_message msg = {
2525 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2526 .rpc_argp = clp,
b4454fe1 2527 .rpc_cred = cred,
1da177e4
LT		 2528 };
2529 unsigned long now = jiffies;
2530 int status;
2531
2532 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2533 if (status < 0)
2534 return status;
2535 spin_lock(&clp->cl_lock);
2536 if (time_before(clp->cl_last_renewal,now))
2537 clp->cl_last_renewal = now;
2538 spin_unlock(&clp->cl_lock);
2539 return 0;
2540}
2541
aa1870af
BF		 2542static inline int nfs4_server_supports_acls(struct nfs_server *server)
2543{
2544 return (server->caps & NFS_CAP_ACLS)
2545 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2546 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2547}
2548
2549/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2550 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2551 * the stack.
2552 */
2553#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2554
2555static void buf_to_pages(const void *buf, size_t buflen,
2556 struct page **pages, unsigned int *pgbase)
2557{
2558 const void *p = buf;
2559
2560 *pgbase = offset_in_page(buf);
2561 p -= *pgbase;
2562 while (p < buf + buflen) {
2563 *(pages++) = virt_to_page(p);
2564 p += PAGE_CACHE_SIZE;
2565 }
2566}
2567
e50a1c2e
BF		 2568struct nfs4_cached_acl {
2569 int cached;
2570 size_t len;
3e9d4154 2571 char data[0];
e50a1c2e
BF		 2572};
2573
2574static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2575{
2576 struct nfs_inode *nfsi = NFS_I(inode);
2577
2578 spin_lock(&inode->i_lock);
2579 kfree(nfsi->nfs4_acl);
2580 nfsi->nfs4_acl = acl;
2581 spin_unlock(&inode->i_lock);
2582}
2583
2584static void nfs4_zap_acl_attr(struct inode *inode)
2585{
2586 nfs4_set_cached_acl(inode, NULL);
2587}
2588
2589static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2590{
2591 struct nfs_inode *nfsi = NFS_I(inode);
2592 struct nfs4_cached_acl *acl;
2593 int ret = -ENOENT;
2594
2595 spin_lock(&inode->i_lock);
2596 acl = nfsi->nfs4_acl;
2597 if (acl == NULL)
2598 goto out;
2599 if (buf == NULL) /* user is just asking for length */
2600 goto out_len;
2601 if (acl->cached == 0)
2602 goto out;
2603 ret = -ERANGE; /* see getxattr(2) man page */
2604 if (acl->len > buflen)
2605 goto out;
2606 memcpy(buf, acl->data, acl->len);
2607out_len:
2608 ret = acl->len;
2609out:
2610 spin_unlock(&inode->i_lock);
2611 return ret;
2612}
2613
2614static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2615{
2616 struct nfs4_cached_acl *acl;
2617
2618 if (buf && acl_len <= PAGE_SIZE) {
2619 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2620 if (acl == NULL)
2621 goto out;
2622 acl->cached = 1;
2623 memcpy(acl->data, buf, acl_len);
2624 } else {
2625 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2626 if (acl == NULL)
2627 goto out;
2628 acl->cached = 0;
2629 }
2630 acl->len = acl_len;
2631out:
2632 nfs4_set_cached_acl(inode, acl);
2633}
2634
16b4289c 2635static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2636{
aa1870af
BF		 2637 struct page *pages[NFS4ACL_MAXPAGES];
2638 struct nfs_getaclargs args = {
2639 .fh = NFS_FH(inode),
2640 .acl_pages = pages,
2641 .acl_len = buflen,
2642 };
2643 size_t resp_len = buflen;
e50a1c2e 2644 void *resp_buf;
aa1870af
BF		 2645 struct rpc_message msg = {
2646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2647 .rpc_argp = &args,
2648 .rpc_resp = &resp_len,
2649 };
e50a1c2e 2650 struct page *localpage = NULL;
aa1870af
BF		 2651 int ret;
2652
e50a1c2e
BF		 2653 if (buflen < PAGE_SIZE) {
2654 /* As long as we're doing a round trip to the server anyway,
2655 * let's be prepared for a page of acl data. */
2656 localpage = alloc_page(GFP_KERNEL);
2657 resp_buf = page_address(localpage);
2658 if (localpage == NULL)
2659 return -ENOMEM;
2660 args.acl_pages[0] = localpage;
2661 args.acl_pgbase = 0;
1d95db8e 2662 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2663 } else {
2664 resp_buf = buf;
2665 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2666 }
aa1870af 2667 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2668 if (ret)
2669 goto out_free;
2670 if (resp_len > args.acl_len)
2671 nfs4_write_cached_acl(inode, NULL, resp_len);
2672 else
2673 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2674 if (buf) {
2675 ret = -ERANGE;
2676 if (resp_len > buflen)
2677 goto out_free;
2678 if (localpage)
2679 memcpy(buf, resp_buf, resp_len);
2680 }
2681 ret = resp_len;
2682out_free:
2683 if (localpage)
2684 __free_page(localpage);
aa1870af
BF		 2685 return ret;
2686}
2687
16b4289c
TM		 2688static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2689{
2690 struct nfs4_exception exception = { };
2691 ssize_t ret;
2692 do {
2693 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2694 if (ret >= 0)
2695 break;
2696 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2697 } while (exception.retry);
2698 return ret;
2699}
2700
e50a1c2e
BF		 2701static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2702{
2703 struct nfs_server *server = NFS_SERVER(inode);
2704 int ret;
2705
2706 if (!nfs4_server_supports_acls(server))
2707 return -EOPNOTSUPP;
2708 ret = nfs_revalidate_inode(server, inode);
2709 if (ret < 0)
2710 return ret;
2711 ret = nfs4_read_cached_acl(inode, buf, buflen);
2712 if (ret != -ENOENT)
2713 return ret;
2714 return nfs4_get_acl_uncached(inode, buf, buflen);
2715}
2716
16b4289c 2717static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2718{
2719 struct nfs_server *server = NFS_SERVER(inode);
2720 struct page *pages[NFS4ACL_MAXPAGES];
2721 struct nfs_setaclargs arg = {
2722 .fh = NFS_FH(inode),
2723 .acl_pages = pages,
2724 .acl_len = buflen,
2725 };
2726 struct rpc_message msg = {
2727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2728 .rpc_argp = &arg,
2729 .rpc_resp = NULL,
2730 };
2731 int ret;
2732
2733 if (!nfs4_server_supports_acls(server))
2734 return -EOPNOTSUPP;
642ac549 2735 nfs_inode_return_delegation(inode);
4b580ee3 2736 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2737 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
08efa202 2738 nfs_zap_caches(inode);
4b580ee3
BF		 2739 return ret;
2740}
2741
16b4289c
TM		 2742static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2743{
2744 struct nfs4_exception exception = { };
2745 int err;
2746 do {
2747 err = nfs4_handle_exception(NFS_SERVER(inode),
2748 __nfs4_proc_set_acl(inode, buf, buflen),
2749 &exception);
2750 } while (exception.retry);
2751 return err;
2752}
2753
1da177e4 2754static int
faf5f49c 2755nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2756{
7539bbab 2757 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2758
2759 if (!clp || task->tk_status >= 0)
2760 return 0;
2761 switch(task->tk_status) {
2762 case -NFS4ERR_STALE_CLIENTID:
2763 case -NFS4ERR_STALE_STATEID:
2764 case -NFS4ERR_EXPIRED:
5d00837b 2765 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 2766 nfs4_schedule_state_recovery(clp);
433fbe4c 2767 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
fda13939 2768 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 2769 task->tk_status = 0;
2770 return -EAGAIN;
1da177e4 2771 case -NFS4ERR_DELAY:
006ea73e
CL		 2772 nfs_inc_server_stats((struct nfs_server *) server,
2773 NFSIOS_DELAY);
2774 case -NFS4ERR_GRACE:
1da177e4
LT		 2775 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2776 task->tk_status = 0;
2777 return -EAGAIN;
2778 case -NFS4ERR_OLD_STATEID:
2779 task->tk_status = 0;
2780 return -EAGAIN;
2781 }
2782 task->tk_status = nfs4_map_errors(task->tk_status);
2783 return 0;
2784}
2785
150030b7 2786static int nfs4_wait_bit_killable(void *word)
433fbe4c 2787{
150030b7 2788 if (fatal_signal_pending(current))
433fbe4c
TM		 2789 return -ERESTARTSYS;
2790 schedule();
2791 return 0;
2792}
2793
adfa6f98 2794static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2795{
433fbe4c 2796 int res;
1da177e4
LT		 2797
2798 might_sleep();
2799
e148582e
TM		 2800 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2801
433fbe4c 2802 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
150030b7 2803 nfs4_wait_bit_killable, TASK_KILLABLE);
e148582e
TM		 2804
2805 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT		 2806 return res;
2807}
2808
2809static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2810{
1da177e4
LT		 2811 int res = 0;
2812
2813 might_sleep();
2814
2815 if (*timeout <= 0)
2816 *timeout = NFS4_POLL_RETRY_MIN;
2817 if (*timeout > NFS4_POLL_RETRY_MAX)
2818 *timeout = NFS4_POLL_RETRY_MAX;
150030b7
MW		 2819 schedule_timeout_killable(*timeout);
2820 if (fatal_signal_pending(current))
2821 res = -ERESTARTSYS;
1da177e4
LT		 2822 *timeout <<= 1;
2823 return res;
2824}
2825
2826/* This is the error handling routine for processes that are allowed
2827 * to sleep.
2828 */
10afec90 2829static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2830{
7539bbab 2831 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2832 int ret = errorcode;
2833
2834 exception->retry = 0;
2835 switch(errorcode) {
2836 case 0:
2837 return 0;
2838 case -NFS4ERR_STALE_CLIENTID:
2839 case -NFS4ERR_STALE_STATEID:
2840 case -NFS4ERR_EXPIRED:
433fbe4c 2841 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2842 ret = nfs4_wait_clnt_recover(server->client, clp);
2843 if (ret == 0)
2844 exception->retry = 1;
2845 break;
c514983d 2846 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2847 case -NFS4ERR_GRACE:
2848 case -NFS4ERR_DELAY:
2849 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2850 if (ret != 0)
2851 break;
1da177e4 2852 case -NFS4ERR_OLD_STATEID:
2c56617d 2853 exception->retry = 1;
1da177e4
LT		 2854 }
2855 /* We failed to handle the error */
2856 return nfs4_map_errors(ret);
2857}
2858
adfa6f98 2859int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2860{
2861 nfs4_verifier sc_verifier;
2862 struct nfs4_setclientid setclientid = {
2863 .sc_verifier = &sc_verifier,
2864 .sc_prog = program,
2865 };
2866 struct rpc_message msg = {
2867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2868 .rpc_argp = &setclientid,
2869 .rpc_resp = clp,
286d7d6a 2870 .rpc_cred = cred,
1da177e4 2871 };
bc4785cd 2872 __be32 *p;
1da177e4
LT		 2873 int loop = 0;
2874 int status;
2875
bc4785cd 2876 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2877 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2878 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2879
2880 for(;;) {
2881 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 2882 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 2883 clp->cl_ipaddr,
2884 rpc_peeraddr2str(clp->cl_rpcclient,
2885 RPC_DISPLAY_ADDR),
69dd716c
TM		 2886 rpc_peeraddr2str(clp->cl_rpcclient,
2887 RPC_DISPLAY_PROTO),
78ea323b 2888 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 2889 clp->cl_id_uniquifier);
2890 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 2891 sizeof(setclientid.sc_netid),
2892 rpc_peeraddr2str(clp->cl_rpcclient,
2893 RPC_DISPLAY_NETID));
1da177e4 2894 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 2895 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 2896 clp->cl_ipaddr, port >> 8, port & 255);
2897
2898 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2899 if (status != -NFS4ERR_CLID_INUSE)
2900 break;
2901 if (signalled())
2902 break;
2903 if (loop++ & 1)
2904 ssleep(clp->cl_lease_time + 1);
2905 else
2906 if (++clp->cl_id_uniquifier == 0)
2907 break;
2908 }
2909 return status;
2910}
2911
adfa6f98 2912static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2913{
2914 struct nfs_fsinfo fsinfo;
2915 struct rpc_message msg = {
2916 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2917 .rpc_argp = clp,
2918 .rpc_resp = &fsinfo,
286d7d6a 2919 .rpc_cred = cred,
1da177e4
LT		 2920 };
2921 unsigned long now;
2922 int status;
2923
2924 now = jiffies;
2925 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2926 if (status == 0) {
2927 spin_lock(&clp->cl_lock);
2928 clp->cl_lease_time = fsinfo.lease_time * HZ;
2929 clp->cl_last_renewal = now;
58d9714a 2930 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2931 spin_unlock(&clp->cl_lock);
2932 }
2933 return status;
2934}
2935
adfa6f98 2936int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM		 2937{
2938 long timeout;
2939 int err;
2940 do {
2941 err = _nfs4_proc_setclientid_confirm(clp, cred);
2942 switch (err) {
2943 case 0:
2944 return err;
2945 case -NFS4ERR_RESOURCE:
2946 /* The IBM lawyers misread another document! */
2947 case -NFS4ERR_DELAY:
2948 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2949 }
2950 } while (err == 0);
2951 return err;
2952}
2953
fe650407
TM		 2954struct nfs4_delegreturndata {
2955 struct nfs4_delegreturnargs args;
fa178f29 2956 struct nfs4_delegreturnres res;
fe650407
TM		 2957 struct nfs_fh fh;
2958 nfs4_stateid stateid;
26e976a8 2959 unsigned long timestamp;
fa178f29 2960 struct nfs_fattr fattr;
fe650407
TM		 2961 int rpc_status;
2962};
2963
fe650407
TM		 2964static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2965{
2966 struct nfs4_delegreturndata *data = calldata;
2967 data->rpc_status = task->tk_status;
26e976a8 2968 if (data->rpc_status == 0)
fa178f29 2969 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 2970}
2971
2972static void nfs4_delegreturn_release(void *calldata)
2973{
fe650407
TM		 2974 kfree(calldata);
2975}
2976
c8d149f3 2977static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 2978 .rpc_call_done = nfs4_delegreturn_done,
2979 .rpc_release = nfs4_delegreturn_release,
2980};
2981
e6f81075 2982static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 2983{
2984 struct nfs4_delegreturndata *data;
fa178f29 2985 struct nfs_server *server = NFS_SERVER(inode);
fe650407 2986 struct rpc_task *task;
5138fde0
TM		 2987 struct rpc_message msg = {
2988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2989 .rpc_cred = cred,
2990 };
c970aa85
TM		 2991 struct rpc_task_setup task_setup_data = {
2992 .rpc_client = server->client,
5138fde0 2993 .rpc_message = &msg,
c970aa85
TM		 2994 .callback_ops = &nfs4_delegreturn_ops,
2995 .flags = RPC_TASK_ASYNC,
2996 };
e6f81075 2997 int status = 0;
fe650407
TM		 2998
2999 data = kmalloc(sizeof(*data), GFP_KERNEL);
3000 if (data == NULL)
3001 return -ENOMEM;
3002 data->args.fhandle = &data->fh;
3003 data->args.stateid = &data->stateid;
fa178f29 3004 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3005 nfs_copy_fh(&data->fh, NFS_FH(inode));
3006 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3007 data->res.fattr = &data->fattr;
3008 data->res.server = server;
5138fde0 3009 nfs_fattr_init(data->res.fattr);
26e976a8 3010 data->timestamp = jiffies;
fe650407
TM		 3011 data->rpc_status = 0;
3012
c970aa85 3013 task_setup_data.callback_data = data;
5138fde0
TM		 3014 msg.rpc_argp = &data->args,
3015 msg.rpc_resp = &data->res,
c970aa85 3016 task = rpc_run_task(&task_setup_data);
7a1218a2 3017 if (IS_ERR(task))
fe650407 3018 return PTR_ERR(task);
e6f81075
TM		 3019 if (!issync)
3020 goto out;
fe650407 3021 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3022 if (status != 0)
3023 goto out;
3024 status = data->rpc_status;
3025 if (status != 0)
3026 goto out;
3027 nfs_refresh_inode(inode, &data->fattr);
3028out:
e6b3c4db 3029 rpc_put_task(task);
fe650407 3030 return status;
1da177e4
LT		 3031}
3032
e6f81075 3033int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3034{
3035 struct nfs_server *server = NFS_SERVER(inode);
3036 struct nfs4_exception exception = { };
3037 int err;
3038 do {
e6f81075 3039 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3040 switch (err) {
3041 case -NFS4ERR_STALE_STATEID:
3042 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3043 case 0:
3044 return 0;
3045 }
3046 err = nfs4_handle_exception(server, err, &exception);
3047 } while (exception.retry);
3048 return err;
3049}
3050
3051#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3052#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3053
3054/*
3055 * sleep, with exponential backoff, and retry the LOCK operation.
3056 */
3057static unsigned long
3058nfs4_set_lock_task_retry(unsigned long timeout)
3059{
150030b7 3060 schedule_timeout_killable(timeout);
1da177e4
LT		 3061 timeout <<= 1;
3062 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3063 return NFS4_LOCK_MAXTIMEOUT;
3064 return timeout;
3065}
3066
1da177e4
LT		 3067static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3068{
3069 struct inode *inode = state->inode;
3070 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3071 struct nfs_client *clp = server->nfs_client;
911d1aaf 3072 struct nfs_lockt_args arg = {
1da177e4 3073 .fh = NFS_FH(inode),
911d1aaf 3074 .fl = request,
1da177e4 3075 };
911d1aaf
TM		 3076 struct nfs_lockt_res res = {
3077 .denied = request,
1da177e4
LT		 3078 };
3079 struct rpc_message msg = {
3080 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3081 .rpc_argp = &arg,
3082 .rpc_resp = &res,
3083 .rpc_cred = state->owner->so_cred,
3084 };
1da177e4
LT		 3085 struct nfs4_lock_state *lsp;
3086 int status;
3087
3088 down_read(&clp->cl_sem);
911d1aaf 3089 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3090 status = nfs4_set_lock_state(state, request);
3091 if (status != 0)
3092 goto out;
3093 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3094 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3095 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3096 switch (status) {
3097 case 0:
3098 request->fl_type = F_UNLCK;
3099 break;
3100 case -NFS4ERR_DENIED:
3101 status = 0;
1da177e4 3102 }
70cc6487 3103 request->fl_ops->fl_release_private(request);
8d0a8a9d 3104out:
1da177e4
LT		 3105 up_read(&clp->cl_sem);
3106 return status;
3107}
3108
3109static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3110{
3111 struct nfs4_exception exception = { };
3112 int err;
3113
3114 do {
3115 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3116 _nfs4_proc_getlk(state, cmd, request),
3117 &exception);
3118 } while (exception.retry);
3119 return err;
3120}
3121
3122static int do_vfs_lock(struct file *file, struct file_lock *fl)
3123{
3124 int res = 0;
3125 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3126 case FL_POSIX:
3127 res = posix_lock_file_wait(file, fl);
3128 break;
3129 case FL_FLOCK:
3130 res = flock_lock_file_wait(file, fl);
3131 break;
3132 default:
3133 BUG();
3134 }
1da177e4
LT		 3135 return res;
3136}
3137
faf5f49c 3138struct nfs4_unlockdata {
911d1aaf
TM		 3139 struct nfs_locku_args arg;
3140 struct nfs_locku_res res;
faf5f49c
TM		 3141 struct nfs4_lock_state *lsp;
3142 struct nfs_open_context *ctx;
911d1aaf
TM		 3143 struct file_lock fl;
3144 const struct nfs_server *server;
26e976a8 3145 unsigned long timestamp;
faf5f49c
TM		 3146};
3147
911d1aaf
TM		 3148static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3149 struct nfs_open_context *ctx,
3150 struct nfs4_lock_state *lsp,
3151 struct nfs_seqid *seqid)
3152{
3153 struct nfs4_unlockdata *p;
3154 struct inode *inode = lsp->ls_state->inode;
3155
3156 p = kmalloc(sizeof(*p), GFP_KERNEL);
3157 if (p == NULL)
3158 return NULL;
3159 p->arg.fh = NFS_FH(inode);
3160 p->arg.fl = &p->fl;
3161 p->arg.seqid = seqid;
c1d51931 3162 p->res.seqid = seqid;
911d1aaf
TM		 3163 p->arg.stateid = &lsp->ls_stateid;
3164 p->lsp = lsp;
3165 atomic_inc(&lsp->ls_count);
3166 /* Ensure we don't close file until we're done freeing locks! */
3167 p->ctx = get_nfs_open_context(ctx);
3168 memcpy(&p->fl, fl, sizeof(p->fl));
3169 p->server = NFS_SERVER(inode);
3170 return p;
3171}
3172
06f814a3 3173static void nfs4_locku_release_calldata(void *data)
faf5f49c 3174{
963d8fe5 3175 struct nfs4_unlockdata *calldata = data;
911d1aaf 3176 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3177 nfs4_put_lock_state(calldata->lsp);
3178 put_nfs_open_context(calldata->ctx);
3179 kfree(calldata);
faf5f49c
TM		 3180}
3181
963d8fe5 3182static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3183{
963d8fe5 3184 struct nfs4_unlockdata *calldata = data;
faf5f49c 3185
06f814a3
TM		 3186 if (RPC_ASSASSINATED(task))
3187 return;
faf5f49c
TM		 3188 switch (task->tk_status) {
3189 case 0:
3190 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3191 calldata->res.stateid.data,
faf5f49c 3192 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3193 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3194 break;
3195 case -NFS4ERR_STALE_STATEID:
3196 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3197 break;
3198 default:
a6a352e9 3199 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
faf5f49c 3200 rpc_restart_call(task);
faf5f49c 3201 }
faf5f49c
TM		 3202}
3203
4ce70ada 3204static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3205{
4ce70ada 3206 struct nfs4_unlockdata *calldata = data;
faf5f49c 3207
911d1aaf 3208 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3209 return;
3210 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3211 /* Note: exit _without_ running nfs4_locku_done */
3212 task->tk_action = NULL;
faf5f49c
TM		 3213 return;
3214 }
26e976a8 3215 calldata->timestamp = jiffies;
5138fde0 3216 rpc_call_start(task);
faf5f49c
TM		 3217}
3218
963d8fe5 3219static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3220 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3221 .rpc_call_done = nfs4_locku_done,
06f814a3 3222 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3223};
3224
a5d16a4d
TM		 3225static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3226 struct nfs_open_context *ctx,
3227 struct nfs4_lock_state *lsp,
3228 struct nfs_seqid *seqid)
3229{
3230 struct nfs4_unlockdata *data;
5138fde0
TM		 3231 struct rpc_message msg = {
3232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3233 .rpc_cred = ctx->cred,
3234 };
c970aa85
TM		 3235 struct rpc_task_setup task_setup_data = {
3236 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3237 .rpc_message = &msg,
c970aa85 3238 .callback_ops = &nfs4_locku_ops,
101070ca 3239 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3240 .flags = RPC_TASK_ASYNC,
3241 };
a5d16a4d 3242
137d6aca
FF		 3243 /* Ensure this is an unlock - when canceling a lock, the
3244 * canceled lock is passed in, and it won't be an unlock.
3245 */
3246 fl->fl_type = F_UNLCK;
3247
a5d16a4d
TM		 3248 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3249 if (data == NULL) {
3250 nfs_free_seqid(seqid);
3251 return ERR_PTR(-ENOMEM);
3252 }
3253
5138fde0
TM		 3254 msg.rpc_argp = &data->arg,
3255 msg.rpc_resp = &data->res,
c970aa85
TM		 3256 task_setup_data.callback_data = data;
3257 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3258}
3259
faf5f49c
TM		 3260static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3261{
911d1aaf 3262 struct nfs_seqid *seqid;
1da177e4 3263 struct nfs4_lock_state *lsp;
06f814a3
TM		 3264 struct rpc_task *task;
3265 int status = 0;
536ff0f8 3266 unsigned char fl_flags = request->fl_flags;
faf5f49c 3267
8d0a8a9d 3268 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3269 /* Unlock _before_ we do the RPC call */
3270 request->fl_flags |= FL_EXISTS;
3271 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3272 goto out;
8d0a8a9d 3273 if (status != 0)
9b073574
TM		 3274 goto out;
3275 /* Is this a delegated lock? */
3276 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3277 goto out;
8d0a8a9d 3278 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3279 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3280 status = -ENOMEM;
911d1aaf 3281 if (seqid == NULL)
9b073574 3282 goto out;
cd3758e3 3283 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3284 status = PTR_ERR(task);
3285 if (IS_ERR(task))
9b073574 3286 goto out;
a5d16a4d 3287 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3288 rpc_put_task(task);
9b073574 3289out:
536ff0f8 3290 request->fl_flags = fl_flags;
1da177e4
LT		 3291 return status;
3292}
3293
a5d16a4d
TM		 3294struct nfs4_lockdata {
3295 struct nfs_lock_args arg;
3296 struct nfs_lock_res res;
3297 struct nfs4_lock_state *lsp;
3298 struct nfs_open_context *ctx;
3299 struct file_lock fl;
26e976a8 3300 unsigned long timestamp;
a5d16a4d
TM		 3301 int rpc_status;
3302 int cancelled;
3303};
3304
3305static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3306 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3307{
a5d16a4d
TM		 3308 struct nfs4_lockdata *p;
3309 struct inode *inode = lsp->ls_state->inode;
1da177e4 3310 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3311
3312 p = kzalloc(sizeof(*p), GFP_KERNEL);
3313 if (p == NULL)
3314 return NULL;
3315
3316 p->arg.fh = NFS_FH(inode);
3317 p->arg.fl = &p->fl;
2f74c0a0
TM		 3318 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3319 if (p->arg.open_seqid == NULL)
3320 goto out_free;
a5d16a4d
TM		 3321 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3322 if (p->arg.lock_seqid == NULL)
2f74c0a0 3323 goto out_free_seqid;
a5d16a4d 3324 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3325 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3326 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3327 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d
TM		 3328 p->lsp = lsp;
3329 atomic_inc(&lsp->ls_count);
3330 p->ctx = get_nfs_open_context(ctx);
3331 memcpy(&p->fl, fl, sizeof(p->fl));
3332 return p;
2f74c0a0
TM		 3333out_free_seqid:
3334 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3335out_free:
3336 kfree(p);
3337 return NULL;
3338}
3339
3340static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3341{
3342 struct nfs4_lockdata *data = calldata;
3343 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3344
a5d16a4d 3345 dprintk("%s: begin!\n", __FUNCTION__);
2f74c0a0
TM		 3346 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3347 return;
a5d16a4d
TM		 3348 /* Do we need to do an open_to_lock_owner? */
3349 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3350 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3351 return;
a5d16a4d
TM		 3352 data->arg.open_stateid = &state->stateid;
3353 data->arg.new_lock_owner = 1;
c1d51931 3354 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3355 } else
3356 data->arg.new_lock_owner = 0;
26e976a8 3357 data->timestamp = jiffies;
5138fde0 3358 rpc_call_start(task);
a5d16a4d
TM		 3359 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3360}
3361
3362static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3363{
3364 struct nfs4_lockdata *data = calldata;
3365
3366 dprintk("%s: begin!\n", __FUNCTION__);
3367
3368 data->rpc_status = task->tk_status;
3369 if (RPC_ASSASSINATED(task))
3370 goto out;
3371 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3372 if (data->rpc_status == 0)
3373 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3374 else
3375 goto out;
3376 }
3377 if (data->rpc_status == 0) {
3378 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3379 sizeof(data->lsp->ls_stateid.data));
3380 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3381 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3382 }
a5d16a4d
TM		 3383out:
3384 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3385}
3386
3387static void nfs4_lock_release(void *calldata)
3388{
3389 struct nfs4_lockdata *data = calldata;
3390
3391 dprintk("%s: begin!\n", __FUNCTION__);
2f74c0a0 3392 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3393 if (data->cancelled != 0) {
3394 struct rpc_task *task;
3395 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3396 data->arg.lock_seqid);
3397 if (!IS_ERR(task))
e6b3c4db 3398 rpc_put_task(task);
a5d16a4d
TM		 3399 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3400 } else
3401 nfs_free_seqid(data->arg.lock_seqid);
3402 nfs4_put_lock_state(data->lsp);
3403 put_nfs_open_context(data->ctx);
3404 kfree(data);
3405 dprintk("%s: done!\n", __FUNCTION__);
3406}
3407
3408static const struct rpc_call_ops nfs4_lock_ops = {
3409 .rpc_call_prepare = nfs4_lock_prepare,
3410 .rpc_call_done = nfs4_lock_done,
3411 .rpc_release = nfs4_lock_release,
3412};
3413
3414static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3415{
3416 struct nfs4_lockdata *data;
3417 struct rpc_task *task;
5138fde0
TM		 3418 struct rpc_message msg = {
3419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3420 .rpc_cred = state->owner->so_cred,
3421 };
c970aa85
TM		 3422 struct rpc_task_setup task_setup_data = {
3423 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3424 .rpc_message = &msg,
c970aa85 3425 .callback_ops = &nfs4_lock_ops,
101070ca 3426 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3427 .flags = RPC_TASK_ASYNC,
3428 };
a5d16a4d
TM		 3429 int ret;
3430
3431 dprintk("%s: begin!\n", __FUNCTION__);
cd3758e3 3432 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3433 fl->fl_u.nfs4_fl.owner);
3434 if (data == NULL)
3435 return -ENOMEM;
3436 if (IS_SETLKW(cmd))
3437 data->arg.block = 1;
3438 if (reclaim != 0)
3439 data->arg.reclaim = 1;
5138fde0
TM		 3440 msg.rpc_argp = &data->arg,
3441 msg.rpc_resp = &data->res,
c970aa85
TM		 3442 task_setup_data.callback_data = data;
3443 task = rpc_run_task(&task_setup_data);
7a1218a2 3444 if (IS_ERR(task))
a5d16a4d 3445 return PTR_ERR(task);
a5d16a4d
TM		 3446 ret = nfs4_wait_for_completion_rpc_task(task);
3447 if (ret == 0) {
3448 ret = data->rpc_status;
3449 if (ret == -NFS4ERR_DENIED)
3450 ret = -EAGAIN;
3451 } else
3452 data->cancelled = 1;
e6b3c4db 3453 rpc_put_task(task);
a5d16a4d
TM		 3454 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3455 return ret;
1da177e4
LT		 3456}
3457
3458static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3459{
202b50dc
TM		 3460 struct nfs_server *server = NFS_SERVER(state->inode);
3461 struct nfs4_exception exception = { };
3462 int err;
3463
3464 do {
42a2d13e
TM		 3465 /* Cache the lock if possible... */
3466 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3467 return 0;
202b50dc
TM		 3468 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3469 if (err != -NFS4ERR_DELAY)
3470 break;
3471 nfs4_handle_exception(server, err, &exception);
3472 } while (exception.retry);
3473 return err;
1da177e4
LT		 3474}
3475
3476static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3477{
202b50dc
TM		 3478 struct nfs_server *server = NFS_SERVER(state->inode);
3479 struct nfs4_exception exception = { };
3480 int err;
3481
6bfc93ef
TM		 3482 err = nfs4_set_lock_state(state, request);
3483 if (err != 0)
3484 return err;
202b50dc 3485 do {
42a2d13e
TM		 3486 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3487 return 0;
202b50dc
TM		 3488 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3489 if (err != -NFS4ERR_DELAY)
3490 break;
3491 nfs4_handle_exception(server, err, &exception);
3492 } while (exception.retry);
3493 return err;
1da177e4
LT		 3494}
3495
3496static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3497{
adfa6f98 3498 struct nfs_client *clp = state->owner->so_client;
01c3b861 3499 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3500 int status;
3501
6bfc93ef 3502 /* Is this a delegated open? */
6bfc93ef
TM		 3503 status = nfs4_set_lock_state(state, request);
3504 if (status != 0)
3505 goto out;
01c3b861
TM		 3506 request->fl_flags |= FL_ACCESS;
3507 status = do_vfs_lock(request->fl_file, request);
3508 if (status < 0)
3509 goto out;
3510 down_read(&clp->cl_sem);
3511 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3512 struct nfs_inode *nfsi = NFS_I(state->inode);
3513 /* Yes: cache locks! */
3514 down_read(&nfsi->rwsem);
3515 /* ...but avoid races with delegation recall... */
3516 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3517 request->fl_flags = fl_flags & ~FL_SLEEP;
3518 status = do_vfs_lock(request->fl_file, request);
3519 up_read(&nfsi->rwsem);
3520 goto out_unlock;
3521 }
3522 up_read(&nfsi->rwsem);
3523 }
6bfc93ef
TM		 3524 status = _nfs4_do_setlk(state, cmd, request, 0);
3525 if (status != 0)
01c3b861 3526 goto out_unlock;
6bfc93ef 3527 /* Note: we always want to sleep here! */
01c3b861 3528 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef
TM		 3529 if (do_vfs_lock(request->fl_file, request) < 0)
3530 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
01c3b861 3531out_unlock:
1da177e4 3532 up_read(&clp->cl_sem);
01c3b861
TM		 3533out:
3534 request->fl_flags = fl_flags;
1da177e4
LT		 3535 return status;
3536}
3537
3538static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3539{
3540 struct nfs4_exception exception = { };
3541 int err;
3542
3543 do {
3544 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3545 _nfs4_proc_setlk(state, cmd, request),
3546 &exception);
3547 } while (exception.retry);
3548 return err;
3549}
3550
3551static int
3552nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3553{
3554 struct nfs_open_context *ctx;
3555 struct nfs4_state *state;
3556 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3557 int status;
3558
3559 /* verify open state */
cd3758e3 3560 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3561 state = ctx->state;
3562
3563 if (request->fl_start < 0 || request->fl_end < 0)
3564 return -EINVAL;
3565
3566 if (IS_GETLK(cmd))
3567 return nfs4_proc_getlk(state, F_GETLK, request);
3568
3569 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3570 return -EINVAL;
3571
3572 if (request->fl_type == F_UNLCK)
3573 return nfs4_proc_unlck(state, cmd, request);
3574
3575 do {
3576 status = nfs4_proc_setlk(state, cmd, request);
3577 if ((status != -EAGAIN) || IS_SETLK(cmd))
3578 break;
3579 timeout = nfs4_set_lock_task_retry(timeout);
3580 status = -ERESTARTSYS;
3581 if (signalled())
3582 break;
3583 } while(status < 0);
1da177e4
LT		 3584 return status;
3585}
3586
888e694c
TM		 3587int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3588{
3589 struct nfs_server *server = NFS_SERVER(state->inode);
3590 struct nfs4_exception exception = { };
3591 int err;
3592
3593 err = nfs4_set_lock_state(state, fl);
3594 if (err != 0)
3595 goto out;
3596 do {
3597 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3598 if (err != -NFS4ERR_DELAY)
3599 break;
3600 err = nfs4_handle_exception(server, err, &exception);
3601 } while (exception.retry);
3602out:
3603 return err;
3604}
6b3b5496 3605
aa1870af
BF		 3606#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3607
6b3b5496
BF		 3608int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3609 size_t buflen, int flags)
3610{
4b580ee3
BF		 3611 struct inode *inode = dentry->d_inode;
3612
3613 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3614 return -EOPNOTSUPP;
3615
4b580ee3 3616 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3617}
3618
3619/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3620 * and that's what we'll do for e.g. user attributes that haven't been set.
3621 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3622 * attributes in kernel-managed attribute namespaces. */
3623ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3624 size_t buflen)
3625{
aa1870af
BF		 3626 struct inode *inode = dentry->d_inode;
3627
3628 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3629 return -EOPNOTSUPP;
3630
3631 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3632}
3633
3634ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3635{
aa1870af 3636 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3637
096455a2
BF		 3638 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3639 return 0;
6b3b5496
BF		 3640 if (buf && buflen < len)
3641 return -ERANGE;
3642 if (buf)
aa1870af
BF		 3643 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3644 return len;
6b3b5496
BF		 3645}
3646
56659e99 3647int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3648 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3649{
3650 struct nfs_server *server = NFS_SERVER(dir);
3651 u32 bitmask[2] = {
361e624f
MN		 3652 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3653 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3654 };
3655 struct nfs4_fs_locations_arg args = {
3656 .dir_fh = NFS_FH(dir),
c228fd3a 3657 .name = name,
683b57b4
TM		 3658 .page = page,
3659 .bitmask = bitmask,
3660 };
3661 struct rpc_message msg = {
3662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3663 .rpc_argp = &args,
7aaa0b3b 3664 .rpc_resp = fs_locations,
683b57b4
TM		 3665 };
3666 int status;
3667
3668 dprintk("%s: start\n", __FUNCTION__);
c228fd3a 3669 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3670 fs_locations->server = server;
830b8e33 3671 fs_locations->nlocations = 0;
683b57b4
TM		 3672 status = rpc_call_sync(server->client, &msg, 0);
3673 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3674 return status;
3675}
3676
1da177e4
LT		 3677struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3678 .recover_open = nfs4_open_reclaim,
3679 .recover_lock = nfs4_lock_reclaim,
3680};
3681
3682struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3683 .recover_open = nfs4_open_expired,
3684 .recover_lock = nfs4_lock_expired,
3685};
3686
92e1d5be 3687static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3688 .permission = nfs_permission,
3689 .getattr = nfs_getattr,
3690 .setattr = nfs_setattr,
3691 .getxattr = nfs4_getxattr,
3692 .setxattr = nfs4_setxattr,
3693 .listxattr = nfs4_listxattr,
3694};
3695
509de811 3696const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3697 .version = 4, /* protocol version */
3698 .dentry_ops = &nfs4_dentry_operations,
3699 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3700 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3701 .getroot = nfs4_proc_get_root,
3702 .getattr = nfs4_proc_getattr,
3703 .setattr = nfs4_proc_setattr,
2b3de441 3704 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3705 .lookup = nfs4_proc_lookup,
3706 .access = nfs4_proc_access,
3707 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3708 .create = nfs4_proc_create,
3709 .remove = nfs4_proc_remove,
3710 .unlink_setup = nfs4_proc_unlink_setup,
3711 .unlink_done = nfs4_proc_unlink_done,
3712 .rename = nfs4_proc_rename,
3713 .link = nfs4_proc_link,
3714 .symlink = nfs4_proc_symlink,
3715 .mkdir = nfs4_proc_mkdir,
3716 .rmdir = nfs4_proc_remove,
3717 .readdir = nfs4_proc_readdir,
3718 .mknod = nfs4_proc_mknod,
3719 .statfs = nfs4_proc_statfs,
3720 .fsinfo = nfs4_proc_fsinfo,
3721 .pathconf = nfs4_proc_pathconf,
e9326dca 3722 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3723 .decode_dirent = nfs4_decode_dirent,
3724 .read_setup = nfs4_proc_read_setup,
ec06c096 3725 .read_done = nfs4_read_done,
1da177e4 3726 .write_setup = nfs4_proc_write_setup,
788e7a89 3727 .write_done = nfs4_write_done,
1da177e4 3728 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3729 .commit_done = nfs4_commit_done,
02a913a7
TM		 3730 .file_open = nfs_open,
3731 .file_release = nfs_release,
1da177e4 3732 .lock = nfs4_proc_lock,
e50a1c2e 3733 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3734};
3735
3736/*
3737 * Local variables:
3738 * c-basic-offset: 8
3739 * End:
3740 */
Linux 6.x block layer and io_uring tree(s)