projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NLM: fix source address of callback to client
[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"
006ea73e 54#include "iostat.h"
1da177e4
LT		 55
56#define NFSDBG_FACILITY NFSDBG_PROC
57
2066fe89 58#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 59#define NFS4_POLL_RETRY_MAX (15*HZ)
60
cdd4e68b 61struct nfs4_opendata;
864472e9 62static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 63static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
faf5f49c 64static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
1da177e4 65static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
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);
aac00a8d 68static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags);
1da177e4 69
1da177e4
LT		 70/* Prevent leaks of NFSv4 errors into userland */
71int nfs4_map_errors(int err)
72{
73 if (err < -1000) {
74 dprintk("%s could not handle NFSv4 error %d\n",
75 __FUNCTION__, -err);
76 return -EIO;
77 }
78 return err;
79}
80
81/*
82 * This is our standard bitmap for GETATTR requests.
83 */
84const u32 nfs4_fattr_bitmap[2] = {
85 FATTR4_WORD0_TYPE
86 | FATTR4_WORD0_CHANGE
87 | FATTR4_WORD0_SIZE
88 | FATTR4_WORD0_FSID
89 | FATTR4_WORD0_FILEID,
90 FATTR4_WORD1_MODE
91 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER
93 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_RAWDEV
95 | FATTR4_WORD1_SPACE_USED
96 | FATTR4_WORD1_TIME_ACCESS
97 | FATTR4_WORD1_TIME_METADATA
98 | FATTR4_WORD1_TIME_MODIFY
99};
100
101const u32 nfs4_statfs_bitmap[2] = {
102 FATTR4_WORD0_FILES_AVAIL
103 | FATTR4_WORD0_FILES_FREE
104 | FATTR4_WORD0_FILES_TOTAL,
105 FATTR4_WORD1_SPACE_AVAIL
106 | FATTR4_WORD1_SPACE_FREE
107 | FATTR4_WORD1_SPACE_TOTAL
108};
109
4ce79717 110const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 111 FATTR4_WORD0_MAXLINK
112 | FATTR4_WORD0_MAXNAME,
113 0
114};
115
116const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
117 | FATTR4_WORD0_MAXREAD
118 | FATTR4_WORD0_MAXWRITE
119 | FATTR4_WORD0_LEASE_TIME,
120 0
121};
122
830b8e33
MN		 123const u32 nfs4_fs_locations_bitmap[2] = {
124 FATTR4_WORD0_TYPE
125 | FATTR4_WORD0_CHANGE
126 | FATTR4_WORD0_SIZE
127 | FATTR4_WORD0_FSID
128 | FATTR4_WORD0_FILEID
129 | FATTR4_WORD0_FS_LOCATIONS,
130 FATTR4_WORD1_MODE
131 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER
133 | FATTR4_WORD1_OWNER_GROUP
134 | FATTR4_WORD1_RAWDEV
135 | FATTR4_WORD1_SPACE_USED
136 | FATTR4_WORD1_TIME_ACCESS
137 | FATTR4_WORD1_TIME_METADATA
138 | FATTR4_WORD1_TIME_MODIFY
139 | FATTR4_WORD1_MOUNTED_ON_FILEID
140};
141
bc4785cd 142static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 143 struct nfs4_readdir_arg *readdir)
144{
0dbb4c67 145 __be32 *start, *p;
1da177e4
LT		 146
147 BUG_ON(readdir->count < 80);
148 if (cookie > 2) {
b7ef1956 149 readdir->cookie = cookie;
1da177e4
LT		 150 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
151 return;
152 }
153
154 readdir->cookie = 0;
155 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
156 if (cookie == 2)
157 return;
158
159 /*
160 * NFSv4 servers do not return entries for '.' and '..'
161 * Therefore, we fake these entries here. We let '.'
162 * have cookie 0 and '..' have cookie 1. Note that
163 * when talking to the server, we always send cookie 0
164 * instead of 1 or 2.
165 */
0dbb4c67 166 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 167
168 if (cookie == 0) {
169 *p++ = xdr_one; /* next */
170 *p++ = xdr_zero; /* cookie, first word */
171 *p++ = xdr_one; /* cookie, second word */
172 *p++ = xdr_one; /* entry len */
173 memcpy(p, ".\0\0\0", 4); /* entry */
174 p++;
175 *p++ = xdr_one; /* bitmap length */
176 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
177 *p++ = htonl(8); /* attribute buffer length */
178 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
179 }
180
181 *p++ = xdr_one; /* next */
182 *p++ = xdr_zero; /* cookie, first word */
183 *p++ = xdr_two; /* cookie, second word */
184 *p++ = xdr_two; /* entry len */
185 memcpy(p, "..\0\0", 4); /* entry */
186 p++;
187 *p++ = xdr_one; /* bitmap length */
188 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
189 *p++ = htonl(8); /* attribute buffer length */
190 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
191
192 readdir->pgbase = (char *)p - (char *)start;
193 readdir->count -= readdir->pgbase;
194 kunmap_atomic(start, KM_USER0);
195}
196
26e976a8 197static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 198{
7539bbab 199 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 200 spin_lock(&clp->cl_lock);
201 if (time_before(clp->cl_last_renewal,timestamp))
202 clp->cl_last_renewal = timestamp;
203 spin_unlock(&clp->cl_lock);
204}
205
38478b24 206static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 207{
38478b24 208 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 209
38478b24
TM		 210 spin_lock(&dir->i_lock);
211 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
1da177e4
LT		 212 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
213 nfsi->change_attr = cinfo->after;
38478b24 214 spin_unlock(&dir->i_lock);
1da177e4
LT		 215}
216
e56e0b78 217struct nfs4_opendata {
c6d00e63 218 struct kref kref;
e56e0b78
TM		 219 struct nfs_openargs o_arg;
220 struct nfs_openres o_res;
cdd4e68b
TM		 221 struct nfs_open_confirmargs c_arg;
222 struct nfs_open_confirmres c_res;
e56e0b78
TM		 223 struct nfs_fattr f_attr;
224 struct nfs_fattr dir_attr;
ad389da7 225 struct path path;
e56e0b78
TM		 226 struct dentry *dir;
227 struct nfs4_state_owner *owner;
aac00a8d 228 struct nfs4_state *state;
e56e0b78 229 struct iattr attrs;
26e976a8 230 unsigned long timestamp;
3e309914 231 unsigned int rpc_done : 1;
24ac23ab
TM		 232 int rpc_status;
233 int cancelled;
e56e0b78
TM		 234};
235
2ced46c2
TM		 236
237static void nfs4_init_opendata_res(struct nfs4_opendata *p)
238{
239 p->o_res.f_attr = &p->f_attr;
240 p->o_res.dir_attr = &p->dir_attr;
241 p->o_res.server = p->o_arg.server;
242 nfs_fattr_init(&p->f_attr);
243 nfs_fattr_init(&p->dir_attr);
244}
245
ad389da7 246static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
e56e0b78
TM		 247 struct nfs4_state_owner *sp, int flags,
248 const struct iattr *attrs)
249{
ad389da7 250 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 251 struct inode *dir = parent->d_inode;
252 struct nfs_server *server = NFS_SERVER(dir);
253 struct nfs4_opendata *p;
254
255 p = kzalloc(sizeof(*p), GFP_KERNEL);
256 if (p == NULL)
257 goto err;
258 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
259 if (p->o_arg.seqid == NULL)
260 goto err_free;
ad389da7
TM		 261 p->path.mnt = mntget(path->mnt);
262 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 263 p->dir = parent;
264 p->owner = sp;
265 atomic_inc(&sp->so_count);
266 p->o_arg.fh = NFS_FH(dir);
267 p->o_arg.open_flags = flags,
7539bbab 268 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 269 p->o_arg.id = sp->so_owner_id.id;
ad389da7 270 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 271 p->o_arg.server = server;
272 p->o_arg.bitmask = server->attr_bitmask;
273 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 274 if (flags & O_EXCL) {
275 u32 *s = (u32 *) p->o_arg.u.verifier.data;
276 s[0] = jiffies;
277 s[1] = current->pid;
278 } else if (flags & O_CREAT) {
279 p->o_arg.u.attrs = &p->attrs;
280 memcpy(&p->attrs, attrs, sizeof(p->attrs));
281 }
cdd4e68b
TM		 282 p->c_arg.fh = &p->o_res.fh;
283 p->c_arg.stateid = &p->o_res.stateid;
284 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 285 nfs4_init_opendata_res(p);
c6d00e63 286 kref_init(&p->kref);
e56e0b78
TM		 287 return p;
288err_free:
289 kfree(p);
290err:
291 dput(parent);
292 return NULL;
293}
294
c6d00e63 295static void nfs4_opendata_free(struct kref *kref)
e56e0b78 296{
c6d00e63
TM		 297 struct nfs4_opendata *p = container_of(kref,
298 struct nfs4_opendata, kref);
299
300 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 301 if (p->state != NULL)
302 nfs4_put_open_state(p->state);
c6d00e63
TM		 303 nfs4_put_state_owner(p->owner);
304 dput(p->dir);
305 dput(p->path.dentry);
306 mntput(p->path.mnt);
307 kfree(p);
308}
309
310static void nfs4_opendata_put(struct nfs4_opendata *p)
311{
312 if (p != NULL)
313 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 314}
315
06f814a3
TM		 316static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
317{
318 sigset_t oldset;
319 int ret;
320
321 rpc_clnt_sigmask(task->tk_client, &oldset);
322 ret = rpc_wait_for_completion_task(task);
323 rpc_clnt_sigunmask(task->tk_client, &oldset);
324 return ret;
325}
326
6ee41268
TM		 327static int can_open_cached(struct nfs4_state *state, int mode)
328{
329 int ret = 0;
330 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
331 case FMODE_READ:
332 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
333 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
334 break;
335 case FMODE_WRITE:
336 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
337 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
338 break;
339 case FMODE_READ|FMODE_WRITE:
340 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
341 }
342 return ret;
343}
344
aac00a8d
TM		 345static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
346{
347 if ((delegation->type & open_flags) != open_flags)
348 return 0;
349 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
350 return 0;
351 return 1;
352}
353
003707c7 354static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
e7616923
TM		 355{
356 switch (open_flags) {
357 case FMODE_WRITE:
358 state->n_wronly++;
359 break;
360 case FMODE_READ:
361 state->n_rdonly++;
362 break;
363 case FMODE_READ|FMODE_WRITE:
364 state->n_rdwr++;
365 }
003707c7
TM		 366 nfs4_state_set_mode_locked(state, state->state | open_flags);
367}
368
369static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
370{
371 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
372 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
373 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
374 switch (open_flags) {
375 case FMODE_READ:
376 set_bit(NFS_O_RDONLY_STATE, &state->flags);
377 break;
378 case FMODE_WRITE:
379 set_bit(NFS_O_WRONLY_STATE, &state->flags);
380 break;
381 case FMODE_READ|FMODE_WRITE:
382 set_bit(NFS_O_RDWR_STATE, &state->flags);
383 }
e7616923
TM		 384}
385
003707c7
TM		 386static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
387{
8bda4e4c 388 write_seqlock(&state->seqlock);
003707c7 389 nfs_set_open_stateid_locked(state, stateid, open_flags);
8bda4e4c 390 write_sequnlock(&state->seqlock);
003707c7
TM		 391}
392
393static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
1da177e4 394{
1da177e4 395 open_flags &= (FMODE_READ|FMODE_WRITE);
8bda4e4c
TM		 396 /*
397 * Protect the call to nfs4_state_set_mode_locked and
398 * serialise the stateid update
399 */
400 write_seqlock(&state->seqlock);
003707c7
TM		 401 if (deleg_stateid != NULL) {
402 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
403 set_bit(NFS_DELEGATED_STATE, &state->flags);
404 }
405 if (open_stateid != NULL)
406 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
8bda4e4c
TM		 407 write_sequnlock(&state->seqlock);
408 spin_lock(&state->owner->so_lock);
e7616923 409 update_open_stateflags(state, open_flags);
ec073428 410 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 411}
412
aac00a8d
TM		 413static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
414{
415 struct nfs_delegation *delegation;
416
417 rcu_read_lock();
418 delegation = rcu_dereference(NFS_I(inode)->delegation);
419 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
420 rcu_read_unlock();
421 return;
422 }
423 rcu_read_unlock();
424 nfs_inode_return_delegation(inode);
425}
426
6ee41268 427static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 428{
429 struct nfs4_state *state = opendata->state;
430 struct nfs_inode *nfsi = NFS_I(state->inode);
431 struct nfs_delegation *delegation;
432 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
433 nfs4_stateid stateid;
434 int ret = -EAGAIN;
435
436 rcu_read_lock();
437 delegation = rcu_dereference(nfsi->delegation);
aac00a8d 438 for (;;) {
6ee41268
TM		 439 if (can_open_cached(state, open_mode)) {
440 spin_lock(&state->owner->so_lock);
441 if (can_open_cached(state, open_mode)) {
442 update_open_stateflags(state, open_mode);
443 spin_unlock(&state->owner->so_lock);
444 rcu_read_unlock();
445 goto out_return_state;
446 }
447 spin_unlock(&state->owner->so_lock);
448 }
449 if (delegation == NULL)
450 break;
aac00a8d
TM		 451 if (!can_open_delegated(delegation, open_mode))
452 break;
453 /* Save the delegation */
454 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
455 rcu_read_unlock();
456 lock_kernel();
457 ret = _nfs4_do_access(state->inode, state->owner->so_cred, open_mode);
458 unlock_kernel();
459 if (ret != 0)
460 goto out;
461 ret = -EAGAIN;
462 rcu_read_lock();
463 delegation = rcu_dereference(nfsi->delegation);
6ee41268 464 /* If no delegation, try a cached open */
aac00a8d 465 if (delegation == NULL)
6ee41268 466 continue;
aac00a8d
TM		 467 /* Is the delegation still valid? */
468 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
469 continue;
470 rcu_read_unlock();
471 update_open_stateid(state, NULL, &stateid, open_mode);
472 goto out_return_state;
473 }
aac00a8d
TM		 474 rcu_read_unlock();
475out:
476 return ERR_PTR(ret);
477out_return_state:
478 atomic_inc(&state->count);
479 return state;
480}
481
24ac23ab
TM		 482static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
483{
484 struct inode *inode;
485 struct nfs4_state *state = NULL;
003707c7
TM		 486 struct nfs_delegation *delegation;
487 nfs4_stateid *deleg_stateid = NULL;
1b370bc2 488 int ret;
24ac23ab 489
aac00a8d 490 if (!data->rpc_done) {
6ee41268 491 state = nfs4_try_open_cached(data);
aac00a8d
TM		 492 goto out;
493 }
494
1b370bc2 495 ret = -EAGAIN;
24ac23ab 496 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 497 goto err;
24ac23ab 498 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 499 ret = PTR_ERR(inode);
03f28e3a 500 if (IS_ERR(inode))
1b370bc2
TM		 501 goto err;
502 ret = -ENOMEM;
24ac23ab
TM		 503 state = nfs4_get_open_state(inode, data->owner);
504 if (state == NULL)
1b370bc2 505 goto err_put_inode;
549d6ed5 506 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 507 int delegation_flags = 0;
508
003707c7
TM		 509 rcu_read_lock();
510 delegation = rcu_dereference(NFS_I(inode)->delegation);
511 if (delegation)
512 delegation_flags = delegation->flags;
513 rcu_read_unlock();
549d6ed5
TM		 514 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
515 nfs_inode_set_delegation(state->inode,
516 data->owner->so_cred,
517 &data->o_res);
518 else
519 nfs_inode_reclaim_delegation(state->inode,
520 data->owner->so_cred,
521 &data->o_res);
522 }
003707c7
TM		 523 rcu_read_lock();
524 delegation = rcu_dereference(NFS_I(inode)->delegation);
525 if (delegation != NULL)
526 deleg_stateid = &delegation->stateid;
527 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
528 rcu_read_unlock();
24ac23ab 529 iput(inode);
aac00a8d 530out:
24ac23ab 531 return state;
1b370bc2
TM		 532err_put_inode:
533 iput(inode);
534err:
535 return ERR_PTR(ret);
24ac23ab
TM		 536}
537
864472e9
TM		 538static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
539{
540 struct nfs_inode *nfsi = NFS_I(state->inode);
541 struct nfs_open_context *ctx;
542
543 spin_lock(&state->inode->i_lock);
544 list_for_each_entry(ctx, &nfsi->open_files, list) {
545 if (ctx->state != state)
546 continue;
547 get_nfs_open_context(ctx);
548 spin_unlock(&state->inode->i_lock);
549 return ctx;
550 }
551 spin_unlock(&state->inode->i_lock);
552 return ERR_PTR(-ENOENT);
553}
554
2ced46c2 555static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
864472e9 556{
2ced46c2 557 struct nfs4_state *newstate;
864472e9
TM		 558 int ret;
559
560 opendata->o_arg.open_flags = openflags;
2ced46c2
TM		 561 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
562 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
563 nfs4_init_opendata_res(opendata);
864472e9
TM		 564 ret = _nfs4_proc_open(opendata);
565 if (ret != 0)
566 return ret;
2ced46c2 567 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 568 if (IS_ERR(newstate))
569 return PTR_ERR(newstate);
570 nfs4_close_state(&opendata->path, newstate, openflags);
2ced46c2 571 *res = newstate;
864472e9
TM		 572 return 0;
573}
574
575static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
576{
864472e9 577 struct nfs4_state *newstate;
864472e9
TM		 578 int ret;
579
580 /* memory barrier prior to reading state->n_* */
2ced46c2 581 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 582 smp_rmb();
583 if (state->n_rdwr != 0) {
2ced46c2 584 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 585 if (ret != 0)
586 return ret;
2ced46c2
TM		 587 if (newstate != state)
588 return -ESTALE;
864472e9
TM		 589 }
590 if (state->n_wronly != 0) {
2ced46c2 591 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 592 if (ret != 0)
593 return ret;
2ced46c2
TM		 594 if (newstate != state)
595 return -ESTALE;
864472e9
TM		 596 }
597 if (state->n_rdonly != 0) {
2ced46c2 598 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 599 if (ret != 0)
600 return ret;
2ced46c2
TM		 601 if (newstate != state)
602 return -ESTALE;
864472e9 603 }
1ac7e2fd
TM		 604 /*
605 * We may have performed cached opens for all three recoveries.
606 * Check if we need to update the current stateid.
607 */
608 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
609 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 610 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 611 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
612 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 613 write_sequnlock(&state->seqlock);
1ac7e2fd 614 }
864472e9
TM		 615 return 0;
616}
617
1da177e4
LT		 618/*
619 * OPEN_RECLAIM:
620 * reclaim state on the server after a reboot.
1da177e4 621 */
539cd03a 622static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 623{
1ac7e2fd 624 struct nfs_delegation *delegation;
864472e9
TM		 625 struct nfs4_opendata *opendata;
626 int delegation_type = 0;
1da177e4
LT		 627 int status;
628
ad389da7 629 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
864472e9 630 if (opendata == NULL)
cee54fc9 631 return -ENOMEM;
864472e9
TM		 632 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
633 opendata->o_arg.fh = NFS_FH(state->inode);
634 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
1ac7e2fd
TM		 635 rcu_read_lock();
636 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
637 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
638 delegation_type = delegation->flags;
639 rcu_read_unlock();
864472e9
TM		 640 opendata->o_arg.u.delegation_type = delegation_type;
641 status = nfs4_open_recover(opendata, state);
c6d00e63 642 nfs4_opendata_put(opendata);
1da177e4
LT		 643 return status;
644}
645
539cd03a 646static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 647{
648 struct nfs_server *server = NFS_SERVER(state->inode);
649 struct nfs4_exception exception = { };
650 int err;
651 do {
539cd03a 652 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 653 if (err != -NFS4ERR_DELAY)
654 break;
655 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 656 } while (exception.retry);
657 return err;
658}
659
864472e9
TM		 660static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
661{
662 struct nfs_open_context *ctx;
663 int ret;
664
665 ctx = nfs4_state_find_open_context(state);
666 if (IS_ERR(ctx))
667 return PTR_ERR(ctx);
539cd03a 668 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 669 put_nfs_open_context(ctx);
670 return ret;
671}
672
13437e12 673static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 674{
675 struct nfs4_state_owner *sp = state->owner;
e56e0b78 676 struct nfs4_opendata *opendata;
864472e9 677 int ret;
1da177e4 678
ad389da7 679 opendata = nfs4_opendata_alloc(&ctx->path, sp, 0, NULL);
e56e0b78 680 if (opendata == NULL)
864472e9 681 return -ENOMEM;
e56e0b78 682 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 683 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 684 sizeof(opendata->o_arg.u.delegation.data));
864472e9 685 ret = nfs4_open_recover(opendata, state);
c6d00e63 686 nfs4_opendata_put(opendata);
864472e9 687 return ret;
1da177e4
LT		 688}
689
13437e12 690int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 691{
692 struct nfs4_exception exception = { };
539cd03a 693 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 694 int err;
695 do {
13437e12 696 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 697 switch (err) {
698 case 0:
699 return err;
700 case -NFS4ERR_STALE_CLIENTID:
701 case -NFS4ERR_STALE_STATEID:
702 case -NFS4ERR_EXPIRED:
703 /* Don't recall a delegation if it was lost */
7539bbab 704 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 705 return err;
706 }
707 err = nfs4_handle_exception(server, err, &exception);
708 } while (exception.retry);
709 return err;
710}
711
cdd4e68b 712static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1da177e4 713{
cdd4e68b
TM		 714 struct nfs4_opendata *data = calldata;
715 struct rpc_message msg = {
716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
717 .rpc_argp = &data->c_arg,
718 .rpc_resp = &data->c_res,
719 .rpc_cred = data->owner->so_cred,
1da177e4 720 };
26e976a8 721 data->timestamp = jiffies;
cdd4e68b
TM		 722 rpc_call_setup(task, &msg, 0);
723}
724
725static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
726{
727 struct nfs4_opendata *data = calldata;
728
729 data->rpc_status = task->tk_status;
730 if (RPC_ASSASSINATED(task))
731 return;
26e976a8 732 if (data->rpc_status == 0) {
cdd4e68b
TM		 733 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
734 sizeof(data->o_res.stateid.data));
26e976a8 735 renew_lease(data->o_res.server, data->timestamp);
3e309914 736 data->rpc_done = 1;
26e976a8 737 }
cdd4e68b 738 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
0f9f95e0 739 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
cdd4e68b
TM		 740}
741
742static void nfs4_open_confirm_release(void *calldata)
743{
744 struct nfs4_opendata *data = calldata;
745 struct nfs4_state *state = NULL;
746
747 /* If this request hasn't been cancelled, do nothing */
748 if (data->cancelled == 0)
749 goto out_free;
750 /* In case of error, no cleanup! */
3e309914 751 if (!data->rpc_done)
cdd4e68b
TM		 752 goto out_free;
753 nfs_confirm_seqid(&data->owner->so_seqid, 0);
754 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 755 if (!IS_ERR(state))
4a35bd41 756 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
cdd4e68b 757out_free:
c6d00e63 758 nfs4_opendata_put(data);
cdd4e68b
TM		 759}
760
761static const struct rpc_call_ops nfs4_open_confirm_ops = {
762 .rpc_call_prepare = nfs4_open_confirm_prepare,
763 .rpc_call_done = nfs4_open_confirm_done,
764 .rpc_release = nfs4_open_confirm_release,
765};
766
767/*
768 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
769 */
770static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
771{
772 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
773 struct rpc_task *task;
1da177e4
LT		 774 int status;
775
c6d00e63 776 kref_get(&data->kref);
3e309914
TM		 777 data->rpc_done = 0;
778 data->rpc_status = 0;
cdd4e68b 779 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
7a1218a2 780 if (IS_ERR(task))
cdd4e68b 781 return PTR_ERR(task);
cdd4e68b
TM		 782 status = nfs4_wait_for_completion_rpc_task(task);
783 if (status != 0) {
784 data->cancelled = 1;
785 smp_wmb();
786 } else
787 status = data->rpc_status;
e6b3c4db 788 rpc_put_task(task);
1da177e4
LT		 789 return status;
790}
791
24ac23ab 792static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 793{
24ac23ab
TM		 794 struct nfs4_opendata *data = calldata;
795 struct nfs4_state_owner *sp = data->owner;
1da177e4
LT		 796 struct rpc_message msg = {
797 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
24ac23ab
TM		 798 .rpc_argp = &data->o_arg,
799 .rpc_resp = &data->o_res,
1da177e4
LT		 800 .rpc_cred = sp->so_cred,
801 };
24ac23ab
TM		 802
803 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
804 return;
aac00a8d
TM		 805 /*
806 * Check if we still need to send an OPEN call, or if we can use
807 * a delegation instead.
808 */
809 if (data->state != NULL) {
810 struct nfs_delegation *delegation;
811
6ee41268
TM		 812 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
813 goto out_no_action;
aac00a8d
TM		 814 rcu_read_lock();
815 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
816 if (delegation != NULL &&
817 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
818 rcu_read_unlock();
6ee41268 819 goto out_no_action;
aac00a8d
TM		 820 }
821 rcu_read_unlock();
822 }
24ac23ab 823 /* Update sequence id. */
9f958ab8 824 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 825 data->o_arg.clientid = sp->so_client->cl_clientid;
864472e9
TM		 826 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
827 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
26e976a8 828 data->timestamp = jiffies;
24ac23ab 829 rpc_call_setup(task, &msg, 0);
6ee41268
TM		 830 return;
831out_no_action:
832 task->tk_action = NULL;
833
24ac23ab 834}
1da177e4 835
24ac23ab
TM		 836static void nfs4_open_done(struct rpc_task *task, void *calldata)
837{
838 struct nfs4_opendata *data = calldata;
1da177e4 839
24ac23ab
TM		 840 data->rpc_status = task->tk_status;
841 if (RPC_ASSASSINATED(task))
842 return;
843 if (task->tk_status == 0) {
844 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 845 case S_IFREG:
846 break;
847 case S_IFLNK:
24ac23ab 848 data->rpc_status = -ELOOP;
6f926b5b
TM		 849 break;
850 case S_IFDIR:
24ac23ab 851 data->rpc_status = -EISDIR;
6f926b5b
TM		 852 break;
853 default:
24ac23ab 854 data->rpc_status = -ENOTDIR;
6f926b5b 855 }
26e976a8 856 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 857 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
858 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 859 }
24ac23ab 860 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
3e309914 861 data->rpc_done = 1;
24ac23ab 862}
6f926b5b 863
24ac23ab
TM		 864static void nfs4_open_release(void *calldata)
865{
866 struct nfs4_opendata *data = calldata;
867 struct nfs4_state *state = NULL;
868
869 /* If this request hasn't been cancelled, do nothing */
870 if (data->cancelled == 0)
871 goto out_free;
872 /* In case of error, no cleanup! */
3e309914 873 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 874 goto out_free;
875 /* In case we need an open_confirm, no cleanup! */
876 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
877 goto out_free;
878 nfs_confirm_seqid(&data->owner->so_seqid, 0);
879 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 880 if (!IS_ERR(state))
4a35bd41 881 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
24ac23ab 882out_free:
c6d00e63 883 nfs4_opendata_put(data);
24ac23ab
TM		 884}
885
886static const struct rpc_call_ops nfs4_open_ops = {
887 .rpc_call_prepare = nfs4_open_prepare,
888 .rpc_call_done = nfs4_open_done,
889 .rpc_release = nfs4_open_release,
890};
891
892/*
893 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
894 */
895static int _nfs4_proc_open(struct nfs4_opendata *data)
896{
897 struct inode *dir = data->dir->d_inode;
898 struct nfs_server *server = NFS_SERVER(dir);
899 struct nfs_openargs *o_arg = &data->o_arg;
900 struct nfs_openres *o_res = &data->o_res;
901 struct rpc_task *task;
902 int status;
903
c6d00e63 904 kref_get(&data->kref);
3e309914
TM		 905 data->rpc_done = 0;
906 data->rpc_status = 0;
2ced46c2 907 data->cancelled = 0;
24ac23ab 908 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
7a1218a2 909 if (IS_ERR(task))
24ac23ab 910 return PTR_ERR(task);
24ac23ab
TM		 911 status = nfs4_wait_for_completion_rpc_task(task);
912 if (status != 0) {
913 data->cancelled = 1;
914 smp_wmb();
915 } else
916 status = data->rpc_status;
e6b3c4db 917 rpc_put_task(task);
3e309914 918 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 919 return status;
920
56ae19f3
TM		 921 if (o_arg->open_flags & O_CREAT) {
922 update_changeattr(dir, &o_res->cinfo);
923 nfs_post_op_update_inode(dir, o_res->dir_attr);
924 } else
925 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 926 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 927 status = _nfs4_proc_open_confirm(data);
1da177e4 928 if (status != 0)
24ac23ab 929 return status;
1da177e4
LT		 930 }
931 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8fa5c000 932 return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 933 return 0;
1da177e4
LT		 934}
935
936static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
937{
938 struct nfs_access_entry cache;
939 int mask = 0;
940 int status;
941
942 if (openflags & FMODE_READ)
943 mask |= MAY_READ;
944 if (openflags & FMODE_WRITE)
945 mask |= MAY_WRITE;
1b45c46c
TM		 946 if (openflags & FMODE_EXEC)
947 mask |= MAY_EXEC;
1da177e4
LT		 948 status = nfs_access_get_cached(inode, cred, &cache);
949 if (status == 0)
950 goto out;
951
952 /* Be clever: ask server to check for all possible rights */
953 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
954 cache.cred = cred;
955 cache.jiffies = jiffies;
956 status = _nfs4_proc_access(inode, &cache);
957 if (status != 0)
958 return status;
959 nfs_access_add_cache(inode, &cache);
960out:
961 if ((cache.mask & mask) == mask)
962 return 0;
963 return -EACCES;
964}
965
10afec90 966static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 967{
7539bbab 968 struct nfs_client *clp = server->nfs_client;
6b30954e 969 int ret;
58d9714a 970
6b30954e
TM		 971 for (;;) {
972 ret = nfs4_wait_clnt_recover(server->client, clp);
973 if (ret != 0)
974 return ret;
975 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
976 break;
58d9714a 977 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 978 }
979 return 0;
58d9714a
TM		 980}
981
1da177e4
LT		 982/*
983 * OPEN_EXPIRED:
984 * reclaim state on the server after a network partition.
985 * Assumes caller holds the appropriate lock
986 */
539cd03a 987static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 988{
e56e0b78 989 struct nfs4_opendata *opendata;
864472e9 990 int ret;
1da177e4 991
1ac7e2fd 992 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
e56e0b78 993 if (opendata == NULL)
864472e9
TM		 994 return -ENOMEM;
995 ret = nfs4_open_recover(opendata, state);
996 if (ret == -ESTALE) {
997 /* Invalidate the state owner so we don't ever use it again */
539cd03a
TM		 998 nfs4_drop_state_owner(state->owner);
999 d_drop(ctx->path.dentry);
1da177e4 1000 }
c6d00e63 1001 nfs4_opendata_put(opendata);
864472e9 1002 return ret;
1da177e4
LT		 1003}
1004
539cd03a 1005static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1006{
539cd03a 1007 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1008 struct nfs4_exception exception = { };
1009 int err;
1010
1011 do {
539cd03a 1012 err = _nfs4_open_expired(ctx, state);
202b50dc
TM		 1013 if (err == -NFS4ERR_DELAY)
1014 nfs4_handle_exception(server, err, &exception);
1015 } while (exception.retry);
1016 return err;
1017}
1018
1da177e4
LT		 1019static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1020{
1da177e4 1021 struct nfs_open_context *ctx;
864472e9 1022 int ret;
1da177e4 1023
864472e9
TM		 1024 ctx = nfs4_state_find_open_context(state);
1025 if (IS_ERR(ctx))
1026 return PTR_ERR(ctx);
539cd03a 1027 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1028 put_nfs_open_context(ctx);
1029 return ret;
1da177e4
LT		 1030}
1031
aa53ed54
JL		 1032/*
1033 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1034 * fields corresponding to attributes that were used to store the verifier.
1035 * Make sure we clobber those fields in the later setattr call
1036 */
1037static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1038{
1039 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1040 !(sattr->ia_valid & ATTR_ATIME_SET))
1041 sattr->ia_valid |= ATTR_ATIME;
1042
1043 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1044 !(sattr->ia_valid & ATTR_MTIME_SET))
1045 sattr->ia_valid |= ATTR_MTIME;
1046}
1047
1da177e4 1048/*
24ac23ab 1049 * Returns a referenced nfs4_state
1da177e4 1050 */
ad389da7 1051static 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		 1052{
1053 struct nfs4_state_owner *sp;
1054 struct nfs4_state *state = NULL;
1055 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 1056 struct nfs_client *clp = server->nfs_client;
e56e0b78 1057 struct nfs4_opendata *opendata;
aac00a8d 1058 int status;
1da177e4
LT		 1059
1060 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1061 status = -ENOMEM;
1062 if (!(sp = nfs4_get_state_owner(server, cred))) {
1063 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1064 goto out_err;
1065 }
58d9714a
TM		 1066 status = nfs4_recover_expired_lease(server);
1067 if (status != 0)
b4454fe1 1068 goto err_put_state_owner;
aac00a8d
TM		 1069 if (path->dentry->d_inode != NULL)
1070 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
58d9714a
TM		 1071 down_read(&clp->cl_sem);
1072 status = -ENOMEM;
ad389da7 1073 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
e56e0b78 1074 if (opendata == NULL)
76723de0 1075 goto err_release_rwsem;
1da177e4 1076
aac00a8d
TM		 1077 if (path->dentry->d_inode != NULL)
1078 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1079
24ac23ab 1080 status = _nfs4_proc_open(opendata);
1da177e4 1081 if (status != 0)
c6d00e63 1082 goto err_opendata_put;
1da177e4 1083
aa53ed54
JL		 1084 if (opendata->o_arg.open_flags & O_EXCL)
1085 nfs4_exclusive_attrset(opendata, sattr);
1086
24ac23ab 1087 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1088 status = PTR_ERR(state);
1089 if (IS_ERR(state))
c6d00e63 1090 goto err_opendata_put;
c6d00e63 1091 nfs4_opendata_put(opendata);
1da177e4
LT		 1092 nfs4_put_state_owner(sp);
1093 up_read(&clp->cl_sem);
1094 *res = state;
1095 return 0;
c6d00e63
TM		 1096err_opendata_put:
1097 nfs4_opendata_put(opendata);
76723de0
TM		 1098err_release_rwsem:
1099 up_read(&clp->cl_sem);
e56e0b78
TM		 1100err_put_state_owner:
1101 nfs4_put_state_owner(sp);
1da177e4 1102out_err:
1da177e4
LT		 1103 *res = NULL;
1104 return status;
1105}
1106
1107
ad389da7 1108static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1109{
1110 struct nfs4_exception exception = { };
1111 struct nfs4_state *res;
1112 int status;
1113
1114 do {
ad389da7 1115 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1da177e4
LT		 1116 if (status == 0)
1117 break;
1118 /* NOTE: BAD_SEQID means the server and client disagree about the
1119 * book-keeping w.r.t. state-changing operations
1120 * (OPEN/CLOSE/LOCK/LOCKU...)
1121 * It is actually a sign of a bug on the client or on the server.
1122 *
1123 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1124 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1125 * have unhashed the old state_owner for us, and that we can
1126 * therefore safely retry using a new one. We should still warn
1127 * the user though...
1128 */
1129 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1130 printk(KERN_WARNING "NFS: v4 server %s "
1131 " returned a bad sequence-id error!\n",
1132 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1133 exception.retry = 1;
1134 continue;
1135 }
550f5747
TM		 1136 /*
1137 * BAD_STATEID on OPEN means that the server cancelled our
1138 * state before it received the OPEN_CONFIRM.
1139 * Recover by retrying the request as per the discussion
1140 * on Page 181 of RFC3530.
1141 */
1142 if (status == -NFS4ERR_BAD_STATEID) {
1143 exception.retry = 1;
1144 continue;
1145 }
aac00a8d
TM		 1146 if (status == -EAGAIN) {
1147 /* We must have found a delegation */
1148 exception.retry = 1;
1149 continue;
1150 }
1da177e4
LT		 1151 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1152 status, &exception));
1153 } while (exception.retry);
1154 return res;
1155}
1156
3e4f6290
TM		 1157static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1158 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1159{
3e4f6290 1160 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1161 struct nfs_setattrargs arg = {
3e4f6290 1162 .fh = NFS_FH(inode),
1da177e4
LT		 1163 .iap = sattr,
1164 .server = server,
1165 .bitmask = server->attr_bitmask,
1166 };
1167 struct nfs_setattrres res = {
1168 .fattr = fattr,
1169 .server = server,
1170 };
1171 struct rpc_message msg = {
1172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1173 .rpc_argp = &arg,
1174 .rpc_resp = &res,
1175 };
26e976a8 1176 unsigned long timestamp = jiffies;
65e4308d 1177 int status;
1da177e4 1178
0e574af1 1179 nfs_fattr_init(fattr);
1da177e4 1180
3e4f6290
TM		 1181 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1182 /* Use that stateid */
1183 } else if (state != NULL) {
1da177e4 1184 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1185 nfs4_copy_stateid(&arg.stateid, state, current->files);
1186 } else
1da177e4
LT		 1187 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1188
65e4308d 1189 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1190 if (status == 0 && state != NULL)
1191 renew_lease(server, timestamp);
65e4308d 1192 return status;
1da177e4
LT		 1193}
1194
3e4f6290
TM		 1195static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1196 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1197{
3e4f6290 1198 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1199 struct nfs4_exception exception = { };
1200 int err;
1201 do {
1202 err = nfs4_handle_exception(server,
3e4f6290 1203 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1204 &exception);
1205 } while (exception.retry);
1206 return err;
1207}
1208
1209struct nfs4_closedata {
4a35bd41 1210 struct path path;
1da177e4
LT		 1211 struct inode *inode;
1212 struct nfs4_state *state;
1213 struct nfs_closeargs arg;
1214 struct nfs_closeres res;
516a6af6 1215 struct nfs_fattr fattr;
26e976a8 1216 unsigned long timestamp;
1da177e4
LT		 1217};
1218
963d8fe5 1219static void nfs4_free_closedata(void *data)
9512135d 1220{
963d8fe5
TM		 1221 struct nfs4_closedata *calldata = data;
1222 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1223
1224 nfs4_put_open_state(calldata->state);
1225 nfs_free_seqid(calldata->arg.seqid);
9512135d 1226 nfs4_put_state_owner(sp);
4a35bd41
TM		 1227 dput(calldata->path.dentry);
1228 mntput(calldata->path.mnt);
9512135d
TM		 1229 kfree(calldata);
1230}
1231
963d8fe5 1232static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1233{
963d8fe5 1234 struct nfs4_closedata *calldata = data;
1da177e4 1235 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1236 struct nfs_server *server = NFS_SERVER(calldata->inode);
1237
4ce70ada
TM		 1238 if (RPC_ASSASSINATED(task))
1239 return;
1da177e4
LT		 1240 /* hmm. we are done with the inode, and in the process of freeing
1241 * the state_owner. we keep this around to process errors
1242 */
cee54fc9 1243 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1244 switch (task->tk_status) {
1245 case 0:
003707c7 1246 nfs_set_open_stateid(state, &calldata->res.stateid, calldata->arg.open_flags);
26e976a8 1247 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1248 break;
1249 case -NFS4ERR_STALE_STATEID:
1250 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1251 break;
1252 default:
1253 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1254 rpc_restart_call(task);
1255 return;
1256 }
1257 }
516a6af6 1258 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1259}
1260
4ce70ada 1261static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1262{
4ce70ada 1263 struct nfs4_closedata *calldata = data;
9512135d 1264 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1265 struct rpc_message msg = {
1266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1267 .rpc_argp = &calldata->arg,
1268 .rpc_resp = &calldata->res,
9512135d 1269 .rpc_cred = state->owner->so_cred,
1da177e4 1270 };
003707c7
TM		 1271 int clear_rd, clear_wr, clear_rdwr;
1272 int mode;
9512135d 1273
963d8fe5 1274 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1275 return;
003707c7
TM		 1276
1277 mode = FMODE_READ|FMODE_WRITE;
1278 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1279 spin_lock(&state->owner->so_lock);
003707c7 1280 /* Calculate the change in open mode */
e7616923 1281 if (state->n_rdwr == 0) {
003707c7 1282 if (state->n_rdonly == 0) {
e7616923 1283 mode &= ~FMODE_READ;
003707c7
TM		 1284 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1285 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1286 }
1287 if (state->n_wronly == 0) {
e7616923 1288 mode &= ~FMODE_WRITE;
003707c7
TM		 1289 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1290 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1291 }
e7616923 1292 }
4cecb76f 1293 spin_unlock(&state->owner->so_lock);
003707c7 1294 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1295 /* Note: exit _without_ calling nfs4_close_done */
1296 task->tk_action = NULL;
9512135d
TM		 1297 return;
1298 }
516a6af6 1299 nfs_fattr_init(calldata->res.fattr);
9512135d 1300 if (mode != 0)
1da177e4 1301 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
9512135d 1302 calldata->arg.open_flags = mode;
26e976a8 1303 calldata->timestamp = jiffies;
9512135d 1304 rpc_call_setup(task, &msg, 0);
1da177e4
LT		 1305}
1306
963d8fe5 1307static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1308 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1309 .rpc_call_done = nfs4_close_done,
1310 .rpc_release = nfs4_free_closedata,
1311};
1312
1da177e4
LT		 1313/*
1314 * It is possible for data to be read/written from a mem-mapped file
1315 * after the sys_close call (which hits the vfs layer as a flush).
1316 * This means that we can't safely call nfsv4 close on a file until
1317 * the inode is cleared. This in turn means that we are not good
1318 * NFSv4 citizens - we do not indicate to the server to update the file's
1319 * share state even when we are done with one of the three share
1320 * stateid's in the inode.
1321 *
1322 * NOTE: Caller must be holding the sp->so_owner semaphore!
1323 */
4a35bd41 1324int nfs4_do_close(struct path *path, struct nfs4_state *state)
1da177e4 1325{
4a35bd41 1326 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1327 struct nfs4_closedata *calldata;
b39e625b
TM		 1328 struct nfs4_state_owner *sp = state->owner;
1329 struct rpc_task *task;
9512135d 1330 int status = -ENOMEM;
1da177e4 1331
9512135d 1332 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1333 if (calldata == NULL)
9512135d 1334 goto out;
4a35bd41 1335 calldata->inode = state->inode;
1da177e4 1336 calldata->state = state;
4a35bd41 1337 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1338 calldata->arg.stateid = &state->open_stateid;
1da177e4 1339 /* Serialization for the sequence id */
cee54fc9 1340 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1341 if (calldata->arg.seqid == NULL)
1342 goto out_free_calldata;
516a6af6
TM		 1343 calldata->arg.bitmask = server->attr_bitmask;
1344 calldata->res.fattr = &calldata->fattr;
1345 calldata->res.server = server;
4a35bd41
TM		 1346 calldata->path.mnt = mntget(path->mnt);
1347 calldata->path.dentry = dget(path->dentry);
9512135d 1348
b39e625b
TM		 1349 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
1350 if (IS_ERR(task))
1351 return PTR_ERR(task);
1352 rpc_put_task(task);
1353 return 0;
9512135d
TM		 1354out_free_calldata:
1355 kfree(calldata);
1356out:
b39e625b
TM		 1357 nfs4_put_open_state(state);
1358 nfs4_put_state_owner(sp);
9512135d 1359 return status;
1da177e4
LT		 1360}
1361
4a35bd41 1362static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM		 1363{
1364 struct file *filp;
1b45c46c 1365 int ret;
02a913a7 1366
1b45c46c
TM		 1367 /* If the open_intent is for execute, we have an extra check to make */
1368 if (nd->intent.open.flags & FMODE_EXEC) {
1369 ret = _nfs4_do_access(state->inode,
1370 state->owner->so_cred,
1371 nd->intent.open.flags);
1372 if (ret < 0)
1373 goto out_close;
1374 }
4a35bd41 1375 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1376 if (!IS_ERR(filp)) {
1377 struct nfs_open_context *ctx;
1378 ctx = (struct nfs_open_context *)filp->private_data;
1379 ctx->state = state;
95cf959b
TM		 1380 return 0;
1381 }
1b45c46c
TM		 1382 ret = PTR_ERR(filp);
1383out_close:
4a35bd41 1384 nfs4_close_state(path, state, nd->intent.open.flags);
1b45c46c 1385 return ret;
02a913a7
TM		 1386}
1387
1388struct dentry *
1da177e4
LT		 1389nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1390{
ad389da7
TM		 1391 struct path path = {
1392 .mnt = nd->mnt,
1393 .dentry = dentry,
1394 };
1da177e4
LT		 1395 struct iattr attr;
1396 struct rpc_cred *cred;
1397 struct nfs4_state *state;
02a913a7 1398 struct dentry *res;
1da177e4
LT		 1399
1400 if (nd->flags & LOOKUP_CREATE) {
1401 attr.ia_mode = nd->intent.open.create_mode;
1402 attr.ia_valid = ATTR_MODE;
1403 if (!IS_POSIXACL(dir))
1404 attr.ia_mode &= ~current->fs->umask;
1405 } else {
1406 attr.ia_valid = 0;
1407 BUG_ON(nd->intent.open.flags & O_CREAT);
1408 }
1409
1f163415 1410 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4 1411 if (IS_ERR(cred))
02a913a7 1412 return (struct dentry *)cred;
ad389da7 1413 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1414 put_rpccred(cred);
02a913a7
TM		 1415 if (IS_ERR(state)) {
1416 if (PTR_ERR(state) == -ENOENT)
1417 d_add(dentry, NULL);
1418 return (struct dentry *)state;
1419 }
24ac23ab 1420 res = d_add_unique(dentry, igrab(state->inode));
02a913a7
TM		 1421 if (res != NULL)
1422 dentry = res;
4a35bd41 1423 nfs4_intent_set_file(nd, &path, state);
02a913a7 1424 return res;
1da177e4
LT		 1425}
1426
1427int
02a913a7 1428nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1429{
ad389da7
TM		 1430 struct path path = {
1431 .mnt = nd->mnt,
1432 .dentry = dentry,
1433 };
1da177e4
LT		 1434 struct rpc_cred *cred;
1435 struct nfs4_state *state;
1da177e4 1436
1f163415 1437 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1438 if (IS_ERR(cred))
1439 return PTR_ERR(cred);
aac00a8d 1440 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1441 put_rpccred(cred);
02a913a7
TM		 1442 if (IS_ERR(state)) {
1443 switch (PTR_ERR(state)) {
1444 case -EPERM:
1445 case -EACCES:
1446 case -EDQUOT:
1447 case -ENOSPC:
1448 case -EROFS:
1449 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1450 return 1;
b87c0adf
CL		 1451 default:
1452 goto out_drop;
02a913a7 1453 }
02a913a7 1454 }
24ac23ab 1455 if (state->inode == dentry->d_inode) {
4a35bd41 1456 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1457 return 1;
1458 }
4a35bd41 1459 nfs4_close_state(&path, state, openflags);
02a913a7
TM		 1460out_drop:
1461 d_drop(dentry);
1da177e4
LT		 1462 return 0;
1463}
1464
1465
1466static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1467{
1468 struct nfs4_server_caps_res res = {};
1469 struct rpc_message msg = {
1470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1471 .rpc_argp = fhandle,
1472 .rpc_resp = &res,
1473 };
1474 int status;
1475
1476 status = rpc_call_sync(server->client, &msg, 0);
1477 if (status == 0) {
1478 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1479 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1480 server->caps |= NFS_CAP_ACLS;
1481 if (res.has_links != 0)
1482 server->caps |= NFS_CAP_HARDLINKS;
1483 if (res.has_symlinks != 0)
1484 server->caps |= NFS_CAP_SYMLINKS;
1485 server->acl_bitmask = res.acl_bitmask;
1486 }
1487 return status;
1488}
1489
55a97593 1490int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1491{
1492 struct nfs4_exception exception = { };
1493 int err;
1494 do {
1495 err = nfs4_handle_exception(server,
1496 _nfs4_server_capabilities(server, fhandle),
1497 &exception);
1498 } while (exception.retry);
1499 return err;
1500}
1501
1502static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1503 struct nfs_fsinfo *info)
1504{
1da177e4
LT		 1505 struct nfs4_lookup_root_arg args = {
1506 .bitmask = nfs4_fattr_bitmap,
1507 };
1508 struct nfs4_lookup_res res = {
1509 .server = server,
0e574af1 1510 .fattr = info->fattr,
1da177e4
LT		 1511 .fh = fhandle,
1512 };
1513 struct rpc_message msg = {
1514 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1515 .rpc_argp = &args,
1516 .rpc_resp = &res,
1517 };
0e574af1 1518 nfs_fattr_init(info->fattr);
1da177e4
LT		 1519 return rpc_call_sync(server->client, &msg, 0);
1520}
1521
1522static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1523 struct nfs_fsinfo *info)
1524{
1525 struct nfs4_exception exception = { };
1526 int err;
1527 do {
1528 err = nfs4_handle_exception(server,
1529 _nfs4_lookup_root(server, fhandle, info),
1530 &exception);
1531 } while (exception.retry);
1532 return err;
1533}
1534
54ceac45
DH		 1535/*
1536 * get the file handle for the "/" directory on the server
1537 */
1da177e4 1538static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1539 struct nfs_fsinfo *info)
1da177e4 1540{
1da177e4
LT		 1541 int status;
1542
1da177e4 1543 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1544 if (status == 0)
1545 status = nfs4_server_capabilities(server, fhandle);
1546 if (status == 0)
1547 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1548 return nfs4_map_errors(status);
1da177e4
LT		 1549}
1550
6b97fd3d
MN		 1551/*
1552 * Get locations and (maybe) other attributes of a referral.
1553 * Note that we'll actually follow the referral later when
1554 * we detect fsid mismatch in inode revalidation
1555 */
1556static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1557{
1558 int status = -ENOMEM;
1559 struct page *page = NULL;
1560 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1561
1562 page = alloc_page(GFP_KERNEL);
1563 if (page == NULL)
1564 goto out;
1565 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1566 if (locations == NULL)
1567 goto out;
1568
c228fd3a 1569 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1570 if (status != 0)
1571 goto out;
1572 /* Make sure server returned a different fsid for the referral */
1573 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1574 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1575 status = -EIO;
1576 goto out;
1577 }
1578
1579 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1580 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1581 if (!fattr->mode)
1582 fattr->mode = S_IFDIR;
1583 memset(fhandle, 0, sizeof(struct nfs_fh));
1584out:
1585 if (page)
1586 __free_page(page);
1587 if (locations)
1588 kfree(locations);
1589 return status;
1590}
1591
1da177e4
LT		 1592static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1593{
1594 struct nfs4_getattr_arg args = {
1595 .fh = fhandle,
1596 .bitmask = server->attr_bitmask,
1597 };
1598 struct nfs4_getattr_res res = {
1599 .fattr = fattr,
1600 .server = server,
1601 };
1602 struct rpc_message msg = {
1603 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1604 .rpc_argp = &args,
1605 .rpc_resp = &res,
1606 };
1607
0e574af1 1608 nfs_fattr_init(fattr);
1da177e4
LT		 1609 return rpc_call_sync(server->client, &msg, 0);
1610}
1611
1612static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1613{
1614 struct nfs4_exception exception = { };
1615 int err;
1616 do {
1617 err = nfs4_handle_exception(server,
1618 _nfs4_proc_getattr(server, fhandle, fattr),
1619 &exception);
1620 } while (exception.retry);
1621 return err;
1622}
1623
1624/*
1625 * The file is not closed if it is opened due to the a request to change
1626 * the size of the file. The open call will not be needed once the
1627 * VFS layer lookup-intents are implemented.
1628 *
1629 * Close is called when the inode is destroyed.
1630 * If we haven't opened the file for O_WRONLY, we
1631 * need to in the size_change case to obtain a stateid.
1632 *
1633 * Got race?
1634 * Because OPEN is always done by name in nfsv4, it is
1635 * possible that we opened a different file by the same
1636 * name. We can recognize this race condition, but we
1637 * can't do anything about it besides returning an error.
1638 *
1639 * This will be fixed with VFS changes (lookup-intent).
1640 */
1641static int
1642nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1643 struct iattr *sattr)
1644{
08e9eac4
TM		 1645 struct rpc_cred *cred;
1646 struct inode *inode = dentry->d_inode;
d530838b
TM		 1647 struct nfs_open_context *ctx;
1648 struct nfs4_state *state = NULL;
1da177e4
LT		 1649 int status;
1650
0e574af1 1651 nfs_fattr_init(fattr);
1da177e4 1652
1f163415 1653 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
08e9eac4
TM		 1654 if (IS_ERR(cred))
1655 return PTR_ERR(cred);
d530838b
TM		 1656
1657 /* Search for an existing open(O_WRITE) file */
1658 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1659 if (ctx != NULL)
1660 state = ctx->state;
08e9eac4 1661
3e4f6290 1662 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1663 if (status == 0)
1664 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1665 if (ctx != NULL)
1666 put_nfs_open_context(ctx);
08e9eac4 1667 put_rpccred(cred);
1da177e4
LT		 1668 return status;
1669}
1670
2b3de441
DH		 1671static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1672 struct qstr *name, struct nfs_fh *fhandle,
1673 struct nfs_fattr *fattr)
1674{
1675 int status;
1676 struct nfs4_lookup_arg args = {
1677 .bitmask = server->attr_bitmask,
1678 .dir_fh = dirfh,
1679 .name = name,
1680 };
1681 struct nfs4_lookup_res res = {
1682 .server = server,
1683 .fattr = fattr,
1684 .fh = fhandle,
1685 };
1686 struct rpc_message msg = {
1687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1688 .rpc_argp = &args,
1689 .rpc_resp = &res,
1690 };
1691
1692 nfs_fattr_init(fattr);
1693
1694 dprintk("NFS call lookupfh %s\n", name->name);
1695 status = rpc_call_sync(server->client, &msg, 0);
1696 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1697 return status;
1698}
1699
1700static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1701 struct qstr *name, struct nfs_fh *fhandle,
1702 struct nfs_fattr *fattr)
1703{
1704 struct nfs4_exception exception = { };
1705 int err;
1706 do {
4e56e082
TM		 1707 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1708 /* FIXME: !!!! */
1709 if (err == -NFS4ERR_MOVED) {
1710 err = -EREMOTE;
1711 break;
1712 }
1713 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1714 } while (exception.retry);
1715 return err;
1716}
1717
1da177e4
LT		 1718static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1719 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1720{
4e56e082 1721 int status;
1da177e4
LT		 1722
1723 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1724 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1725 if (status == -NFS4ERR_MOVED)
1726 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1727 dprintk("NFS reply lookup: %d\n", status);
1728 return status;
1729}
1730
1731static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1732{
1733 struct nfs4_exception exception = { };
1734 int err;
1735 do {
1736 err = nfs4_handle_exception(NFS_SERVER(dir),
1737 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1738 &exception);
1739 } while (exception.retry);
1740 return err;
1741}
1742
1743static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1744{
1745 struct nfs4_accessargs args = {
1746 .fh = NFS_FH(inode),
1747 };
1748 struct nfs4_accessres res = { 0 };
1749 struct rpc_message msg = {
1750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1751 .rpc_argp = &args,
1752 .rpc_resp = &res,
1753 .rpc_cred = entry->cred,
1754 };
1755 int mode = entry->mask;
1756 int status;
1757
1758 /*
1759 * Determine which access bits we want to ask for...
1760 */
1761 if (mode & MAY_READ)
1762 args.access |= NFS4_ACCESS_READ;
1763 if (S_ISDIR(inode->i_mode)) {
1764 if (mode & MAY_WRITE)
1765 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1766 if (mode & MAY_EXEC)
1767 args.access |= NFS4_ACCESS_LOOKUP;
1768 } else {
1769 if (mode & MAY_WRITE)
1770 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1771 if (mode & MAY_EXEC)
1772 args.access |= NFS4_ACCESS_EXECUTE;
1773 }
1774 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1775 if (!status) {
1776 entry->mask = 0;
1777 if (res.access & NFS4_ACCESS_READ)
1778 entry->mask |= MAY_READ;
1779 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1780 entry->mask |= MAY_WRITE;
1781 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1782 entry->mask |= MAY_EXEC;
1783 }
1784 return status;
1785}
1786
1787static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1788{
1789 struct nfs4_exception exception = { };
1790 int err;
1791 do {
1792 err = nfs4_handle_exception(NFS_SERVER(inode),
1793 _nfs4_proc_access(inode, entry),
1794 &exception);
1795 } while (exception.retry);
1796 return err;
1797}
1798
1799/*
1800 * TODO: For the time being, we don't try to get any attributes
1801 * along with any of the zero-copy operations READ, READDIR,
1802 * READLINK, WRITE.
1803 *
1804 * In the case of the first three, we want to put the GETATTR
1805 * after the read-type operation -- this is because it is hard
1806 * to predict the length of a GETATTR response in v4, and thus
1807 * align the READ data correctly. This means that the GETATTR
1808 * may end up partially falling into the page cache, and we should
1809 * shift it into the 'tail' of the xdr_buf before processing.
1810 * To do this efficiently, we need to know the total length
1811 * of data received, which doesn't seem to be available outside
1812 * of the RPC layer.
1813 *
1814 * In the case of WRITE, we also want to put the GETATTR after
1815 * the operation -- in this case because we want to make sure
1816 * we get the post-operation mtime and size. This means that
1817 * we can't use xdr_encode_pages() as written: we need a variant
1818 * of it which would leave room in the 'tail' iovec.
1819 *
1820 * Both of these changes to the XDR layer would in fact be quite
1821 * minor, but I decided to leave them for a subsequent patch.
1822 */
1823static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1824 unsigned int pgbase, unsigned int pglen)
1825{
1826 struct nfs4_readlink args = {
1827 .fh = NFS_FH(inode),
1828 .pgbase = pgbase,
1829 .pglen = pglen,
1830 .pages = &page,
1831 };
1832 struct rpc_message msg = {
1833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1834 .rpc_argp = &args,
1835 .rpc_resp = NULL,
1836 };
1837
1838 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1839}
1840
1841static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1842 unsigned int pgbase, unsigned int pglen)
1843{
1844 struct nfs4_exception exception = { };
1845 int err;
1846 do {
1847 err = nfs4_handle_exception(NFS_SERVER(inode),
1848 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1849 &exception);
1850 } while (exception.retry);
1851 return err;
1852}
1853
1da177e4
LT		 1854/*
1855 * Got race?
1856 * We will need to arrange for the VFS layer to provide an atomic open.
1857 * Until then, this create/open method is prone to inefficiency and race
1858 * conditions due to the lookup, create, and open VFS calls from sys_open()
1859 * placed on the wire.
1860 *
1861 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1862 * The file will be opened again in the subsequent VFS open call
1863 * (nfs4_proc_file_open).
1864 *
1865 * The open for read will just hang around to be used by any process that
1866 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1867 */
1868
1869static int
1870nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1871 int flags, struct nameidata *nd)
1da177e4 1872{
ad389da7
TM		 1873 struct path path = {
1874 .mnt = nd->mnt,
1875 .dentry = dentry,
1876 };
1da177e4
LT		 1877 struct nfs4_state *state;
1878 struct rpc_cred *cred;
1879 int status = 0;
1880
1f163415 1881 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1882 if (IS_ERR(cred)) {
1883 status = PTR_ERR(cred);
1884 goto out;
1885 }
ad389da7 1886 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1da177e4
LT		 1887 put_rpccred(cred);
1888 if (IS_ERR(state)) {
1889 status = PTR_ERR(state);
1890 goto out;
1891 }
24ac23ab 1892 d_instantiate(dentry, igrab(state->inode));
1da177e4
LT		 1893 if (flags & O_EXCL) {
1894 struct nfs_fattr fattr;
3e4f6290 1895 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1896 if (status == 0)
65e4308d 1897 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 1898 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 1899 }
ad389da7 1900 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
4a35bd41 1901 status = nfs4_intent_set_file(nd, &path, state);
02a913a7 1902 else
4a35bd41 1903 nfs4_close_state(&path, state, flags);
1da177e4
LT		 1904out:
1905 return status;
1906}
1907
1908static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1909{
16e42959 1910 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 1911 struct nfs4_remove_arg args = {
1912 .fh = NFS_FH(dir),
1913 .name = name,
16e42959
TM		 1914 .bitmask = server->attr_bitmask,
1915 };
1916 struct nfs_fattr dir_attr;
1917 struct nfs4_remove_res res = {
1918 .server = server,
1919 .dir_attr = &dir_attr,
1da177e4 1920 };
1da177e4
LT		 1921 struct rpc_message msg = {
1922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1923 .rpc_argp = &args,
1924 .rpc_resp = &res,
1925 };
1926 int status;
1927
16e42959
TM		 1928 nfs_fattr_init(res.dir_attr);
1929 status = rpc_call_sync(server->client, &msg, 0);
1930 if (status == 0) {
1931 update_changeattr(dir, &res.cinfo);
1932 nfs_post_op_update_inode(dir, res.dir_attr);
1933 }
1da177e4
LT		 1934 return status;
1935}
1936
1937static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1938{
1939 struct nfs4_exception exception = { };
1940 int err;
1941 do {
1942 err = nfs4_handle_exception(NFS_SERVER(dir),
1943 _nfs4_proc_remove(dir, name),
1944 &exception);
1945 } while (exception.retry);
1946 return err;
1947}
1948
1949struct unlink_desc {
1950 struct nfs4_remove_arg args;
16e42959
TM		 1951 struct nfs4_remove_res res;
1952 struct nfs_fattr dir_attr;
1da177e4
LT		 1953};
1954
1955static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1956 struct qstr *name)
1957{
16e42959 1958 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1da177e4
LT		 1959 struct unlink_desc *up;
1960
5cbded58 1961 up = kmalloc(sizeof(*up), GFP_KERNEL);
1da177e4
LT		 1962 if (!up)
1963 return -ENOMEM;
1964
1965 up->args.fh = NFS_FH(dir->d_inode);
1966 up->args.name = name;
16e42959
TM		 1967 up->args.bitmask = server->attr_bitmask;
1968 up->res.server = server;
1969 up->res.dir_attr = &up->dir_attr;
1da177e4
LT		 1970
1971 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1972 msg->rpc_argp = &up->args;
1973 msg->rpc_resp = &up->res;
1974 return 0;
1975}
1976
1977static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1978{
1979 struct rpc_message *msg = &task->tk_msg;
1980 struct unlink_desc *up;
1981
1982 if (msg->rpc_resp != NULL) {
1983 up = container_of(msg->rpc_resp, struct unlink_desc, res);
16e42959
TM		 1984 update_changeattr(dir->d_inode, &up->res.cinfo);
1985 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1da177e4
LT		 1986 kfree(up);
1987 msg->rpc_resp = NULL;
1988 msg->rpc_argp = NULL;
1989 }
1990 return 0;
1991}
1992
1993static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1994 struct inode *new_dir, struct qstr *new_name)
1995{
6caf2c82 1996 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1997 struct nfs4_rename_arg arg = {
1998 .old_dir = NFS_FH(old_dir),
1999 .new_dir = NFS_FH(new_dir),
2000 .old_name = old_name,
2001 .new_name = new_name,
6caf2c82
TM		 2002 .bitmask = server->attr_bitmask,
2003 };
2004 struct nfs_fattr old_fattr, new_fattr;
2005 struct nfs4_rename_res res = {
2006 .server = server,
2007 .old_fattr = &old_fattr,
2008 .new_fattr = &new_fattr,
1da177e4 2009 };
1da177e4
LT		 2010 struct rpc_message msg = {
2011 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2012 .rpc_argp = &arg,
2013 .rpc_resp = &res,
2014 };
2015 int status;
2016
6caf2c82
TM		 2017 nfs_fattr_init(res.old_fattr);
2018 nfs_fattr_init(res.new_fattr);
2019 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2020
2021 if (!status) {
2022 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2023 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2024 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2025 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2026 }
2027 return status;
2028}
2029
2030static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2031 struct inode *new_dir, struct qstr *new_name)
2032{
2033 struct nfs4_exception exception = { };
2034 int err;
2035 do {
2036 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2037 _nfs4_proc_rename(old_dir, old_name,
2038 new_dir, new_name),
2039 &exception);
2040 } while (exception.retry);
2041 return err;
2042}
2043
2044static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2045{
91ba2eee 2046 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2047 struct nfs4_link_arg arg = {
2048 .fh = NFS_FH(inode),
2049 .dir_fh = NFS_FH(dir),
2050 .name = name,
91ba2eee
TM		 2051 .bitmask = server->attr_bitmask,
2052 };
2053 struct nfs_fattr fattr, dir_attr;
2054 struct nfs4_link_res res = {
2055 .server = server,
2056 .fattr = &fattr,
2057 .dir_attr = &dir_attr,
1da177e4 2058 };
1da177e4
LT		 2059 struct rpc_message msg = {
2060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2061 .rpc_argp = &arg,
91ba2eee 2062 .rpc_resp = &res,
1da177e4
LT		 2063 };
2064 int status;
2065
91ba2eee
TM		 2066 nfs_fattr_init(res.fattr);
2067 nfs_fattr_init(res.dir_attr);
2068 status = rpc_call_sync(server->client, &msg, 0);
2069 if (!status) {
2070 update_changeattr(dir, &res.cinfo);
2071 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2072 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2073 }
1da177e4
LT		 2074
2075 return status;
2076}
2077
2078static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2079{
2080 struct nfs4_exception exception = { };
2081 int err;
2082 do {
2083 err = nfs4_handle_exception(NFS_SERVER(inode),
2084 _nfs4_proc_link(inode, dir, name),
2085 &exception);
2086 } while (exception.retry);
2087 return err;
2088}
2089
4f390c15 2090static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2091 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2092{
2093 struct nfs_server *server = NFS_SERVER(dir);
4f390c15
CL		 2094 struct nfs_fh fhandle;
2095 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2096 struct nfs4_create_arg arg = {
2097 .dir_fh = NFS_FH(dir),
2098 .server = server,
4f390c15 2099 .name = &dentry->d_name,
1da177e4
LT		 2100 .attrs = sattr,
2101 .ftype = NF4LNK,
2102 .bitmask = server->attr_bitmask,
2103 };
2104 struct nfs4_create_res res = {
2105 .server = server,
4f390c15
CL		 2106 .fh = &fhandle,
2107 .fattr = &fattr,
56ae19f3 2108 .dir_fattr = &dir_fattr,
1da177e4
LT		 2109 };
2110 struct rpc_message msg = {
2111 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2112 .rpc_argp = &arg,
2113 .rpc_resp = &res,
2114 };
2115 int status;
2116
94a6d753 2117 if (len > NFS4_MAXPATHLEN)
1da177e4 2118 return -ENAMETOOLONG;
4f390c15 2119
94a6d753
CL		 2120 arg.u.symlink.pages = &page;
2121 arg.u.symlink.len = len;
4f390c15 2122 nfs_fattr_init(&fattr);
56ae19f3 2123 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2124
2125 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
4f390c15 2126 if (!status) {
1da177e4 2127 update_changeattr(dir, &res.dir_cinfo);
4f390c15
CL		 2128 nfs_post_op_update_inode(dir, res.dir_fattr);
2129 status = nfs_instantiate(dentry, &fhandle, &fattr);
2130 }
1da177e4
LT		 2131 return status;
2132}
2133
4f390c15 2134static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2135 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2136{
2137 struct nfs4_exception exception = { };
2138 int err;
2139 do {
2140 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2141 _nfs4_proc_symlink(dir, dentry, page,
2142 len, sattr),
1da177e4
LT		 2143 &exception);
2144 } while (exception.retry);
2145 return err;
2146}
2147
2148static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2149 struct iattr *sattr)
2150{
2151 struct nfs_server *server = NFS_SERVER(dir);
2152 struct nfs_fh fhandle;
56ae19f3 2153 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2154 struct nfs4_create_arg arg = {
2155 .dir_fh = NFS_FH(dir),
2156 .server = server,
2157 .name = &dentry->d_name,
2158 .attrs = sattr,
2159 .ftype = NF4DIR,
2160 .bitmask = server->attr_bitmask,
2161 };
2162 struct nfs4_create_res res = {
2163 .server = server,
2164 .fh = &fhandle,
2165 .fattr = &fattr,
56ae19f3 2166 .dir_fattr = &dir_fattr,
1da177e4
LT		 2167 };
2168 struct rpc_message msg = {
2169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2170 .rpc_argp = &arg,
2171 .rpc_resp = &res,
2172 };
2173 int status;
2174
0e574af1 2175 nfs_fattr_init(&fattr);
56ae19f3 2176 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2177
2178 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2179 if (!status) {
2180 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2181 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2182 status = nfs_instantiate(dentry, &fhandle, &fattr);
2183 }
2184 return status;
2185}
2186
2187static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2188 struct iattr *sattr)
2189{
2190 struct nfs4_exception exception = { };
2191 int err;
2192 do {
2193 err = nfs4_handle_exception(NFS_SERVER(dir),
2194 _nfs4_proc_mkdir(dir, dentry, sattr),
2195 &exception);
2196 } while (exception.retry);
2197 return err;
2198}
2199
2200static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2201 u64 cookie, struct page *page, unsigned int count, int plus)
2202{
2203 struct inode *dir = dentry->d_inode;
2204 struct nfs4_readdir_arg args = {
2205 .fh = NFS_FH(dir),
2206 .pages = &page,
2207 .pgbase = 0,
2208 .count = count,
2209 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2210 };
2211 struct nfs4_readdir_res res;
2212 struct rpc_message msg = {
2213 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2214 .rpc_argp = &args,
2215 .rpc_resp = &res,
2216 .rpc_cred = cred,
2217 };
2218 int status;
2219
eadf4598
TM		 2220 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2221 dentry->d_parent->d_name.name,
2222 dentry->d_name.name,
2223 (unsigned long long)cookie);
1da177e4
LT		 2224 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2225 res.pgbase = args.pgbase;
2226 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2227 if (status == 0)
2228 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
eadf4598 2229 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2230 return status;
2231}
2232
2233static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2234 u64 cookie, struct page *page, unsigned int count, int plus)
2235{
2236 struct nfs4_exception exception = { };
2237 int err;
2238 do {
2239 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2240 _nfs4_proc_readdir(dentry, cred, cookie,
2241 page, count, plus),
2242 &exception);
2243 } while (exception.retry);
2244 return err;
2245}
2246
2247static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2248 struct iattr *sattr, dev_t rdev)
2249{
2250 struct nfs_server *server = NFS_SERVER(dir);
2251 struct nfs_fh fh;
56ae19f3 2252 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2253 struct nfs4_create_arg arg = {
2254 .dir_fh = NFS_FH(dir),
2255 .server = server,
2256 .name = &dentry->d_name,
2257 .attrs = sattr,
2258 .bitmask = server->attr_bitmask,
2259 };
2260 struct nfs4_create_res res = {
2261 .server = server,
2262 .fh = &fh,
2263 .fattr = &fattr,
56ae19f3 2264 .dir_fattr = &dir_fattr,
1da177e4
LT		 2265 };
2266 struct rpc_message msg = {
2267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2268 .rpc_argp = &arg,
2269 .rpc_resp = &res,
2270 };
2271 int status;
2272 int mode = sattr->ia_mode;
2273
0e574af1 2274 nfs_fattr_init(&fattr);
56ae19f3 2275 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2276
2277 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2278 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2279 if (S_ISFIFO(mode))
2280 arg.ftype = NF4FIFO;
2281 else if (S_ISBLK(mode)) {
2282 arg.ftype = NF4BLK;
2283 arg.u.device.specdata1 = MAJOR(rdev);
2284 arg.u.device.specdata2 = MINOR(rdev);
2285 }
2286 else if (S_ISCHR(mode)) {
2287 arg.ftype = NF4CHR;
2288 arg.u.device.specdata1 = MAJOR(rdev);
2289 arg.u.device.specdata2 = MINOR(rdev);
2290 }
2291 else
2292 arg.ftype = NF4SOCK;
2293
2294 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2295 if (status == 0) {
2296 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2297 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2298 status = nfs_instantiate(dentry, &fh, &fattr);
2299 }
2300 return status;
2301}
2302
2303static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2304 struct iattr *sattr, dev_t rdev)
2305{
2306 struct nfs4_exception exception = { };
2307 int err;
2308 do {
2309 err = nfs4_handle_exception(NFS_SERVER(dir),
2310 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2311 &exception);
2312 } while (exception.retry);
2313 return err;
2314}
2315
2316static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2317 struct nfs_fsstat *fsstat)
2318{
2319 struct nfs4_statfs_arg args = {
2320 .fh = fhandle,
2321 .bitmask = server->attr_bitmask,
2322 };
2323 struct rpc_message msg = {
2324 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2325 .rpc_argp = &args,
2326 .rpc_resp = fsstat,
2327 };
2328
0e574af1 2329 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2330 return rpc_call_sync(server->client, &msg, 0);
2331}
2332
2333static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2334{
2335 struct nfs4_exception exception = { };
2336 int err;
2337 do {
2338 err = nfs4_handle_exception(server,
2339 _nfs4_proc_statfs(server, fhandle, fsstat),
2340 &exception);
2341 } while (exception.retry);
2342 return err;
2343}
2344
2345static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2346 struct nfs_fsinfo *fsinfo)
2347{
2348 struct nfs4_fsinfo_arg args = {
2349 .fh = fhandle,
2350 .bitmask = server->attr_bitmask,
2351 };
2352 struct rpc_message msg = {
2353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2354 .rpc_argp = &args,
2355 .rpc_resp = fsinfo,
2356 };
2357
2358 return rpc_call_sync(server->client, &msg, 0);
2359}
2360
2361static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2362{
2363 struct nfs4_exception exception = { };
2364 int err;
2365
2366 do {
2367 err = nfs4_handle_exception(server,
2368 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2369 &exception);
2370 } while (exception.retry);
2371 return err;
2372}
2373
2374static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2375{
0e574af1 2376 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2377 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2378}
2379
2380static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2381 struct nfs_pathconf *pathconf)
2382{
2383 struct nfs4_pathconf_arg args = {
2384 .fh = fhandle,
2385 .bitmask = server->attr_bitmask,
2386 };
2387 struct rpc_message msg = {
2388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2389 .rpc_argp = &args,
2390 .rpc_resp = pathconf,
2391 };
2392
2393 /* None of the pathconf attributes are mandatory to implement */
2394 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2395 memset(pathconf, 0, sizeof(*pathconf));
2396 return 0;
2397 }
2398
0e574af1 2399 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2400 return rpc_call_sync(server->client, &msg, 0);
2401}
2402
2403static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2404 struct nfs_pathconf *pathconf)
2405{
2406 struct nfs4_exception exception = { };
2407 int err;
2408
2409 do {
2410 err = nfs4_handle_exception(server,
2411 _nfs4_proc_pathconf(server, fhandle, pathconf),
2412 &exception);
2413 } while (exception.retry);
2414 return err;
2415}
2416
ec06c096 2417static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2418{
ec06c096 2419 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2420
ec06c096 2421 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2422 rpc_restart_call(task);
ec06c096 2423 return -EAGAIN;
1da177e4
LT		 2424 }
2425 if (task->tk_status > 0)
ec06c096
TM		 2426 renew_lease(server, data->timestamp);
2427 return 0;
1da177e4
LT		 2428}
2429
ec06c096 2430static void nfs4_proc_read_setup(struct nfs_read_data *data)
1da177e4 2431{
1da177e4
LT		 2432 struct rpc_message msg = {
2433 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2434 .rpc_argp = &data->args,
2435 .rpc_resp = &data->res,
2436 .rpc_cred = data->cred,
2437 };
1da177e4
LT		 2438
2439 data->timestamp = jiffies;
2440
ec06c096 2441 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2442}
2443
788e7a89 2444static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2445{
1da177e4
LT		 2446 struct inode *inode = data->inode;
2447
2448 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2449 rpc_restart_call(task);
788e7a89 2450 return -EAGAIN;
1da177e4 2451 }
4f9838c7 2452 if (task->tk_status >= 0) {
1da177e4 2453 renew_lease(NFS_SERVER(inode), data->timestamp);
4f9838c7
TM		 2454 nfs_post_op_update_inode(inode, data->res.fattr);
2455 }
788e7a89 2456 return 0;
1da177e4
LT		 2457}
2458
788e7a89 2459static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1da177e4 2460{
1da177e4
LT		 2461 struct rpc_message msg = {
2462 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2463 .rpc_argp = &data->args,
2464 .rpc_resp = &data->res,
2465 .rpc_cred = data->cred,
2466 };
2467 struct inode *inode = data->inode;
4f9838c7 2468 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2469 int stable;
1da177e4
LT		 2470
2471 if (how & FLUSH_STABLE) {
2472 if (!NFS_I(inode)->ncommit)
2473 stable = NFS_FILE_SYNC;
2474 else
2475 stable = NFS_DATA_SYNC;
2476 } else
2477 stable = NFS_UNSTABLE;
2478 data->args.stable = stable;
4f9838c7
TM		 2479 data->args.bitmask = server->attr_bitmask;
2480 data->res.server = server;
1da177e4
LT		 2481
2482 data->timestamp = jiffies;
2483
1da177e4 2484 /* Finalize the task. */
788e7a89 2485 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2486}
2487
788e7a89 2488static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2489{
1da177e4
LT		 2490 struct inode *inode = data->inode;
2491
2492 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2493 rpc_restart_call(task);
788e7a89 2494 return -EAGAIN;
1da177e4 2495 }
4f9838c7
TM		 2496 if (task->tk_status >= 0)
2497 nfs_post_op_update_inode(inode, data->res.fattr);
788e7a89 2498 return 0;
1da177e4
LT		 2499}
2500
788e7a89 2501static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1da177e4 2502{
1da177e4
LT		 2503 struct rpc_message msg = {
2504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2505 .rpc_argp = &data->args,
2506 .rpc_resp = &data->res,
2507 .rpc_cred = data->cred,
2508 };
788e7a89 2509 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2510
4f9838c7
TM		 2511 data->args.bitmask = server->attr_bitmask;
2512 data->res.server = server;
2513
788e7a89 2514 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2515}
2516
2517/*
2518 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2519 * standalone procedure for queueing an asynchronous RENEW.
2520 */
963d8fe5 2521static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2522{
adfa6f98 2523 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2524 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2525
2526 if (task->tk_status < 0) {
2527 switch (task->tk_status) {
2528 case -NFS4ERR_STALE_CLIENTID:
2529 case -NFS4ERR_EXPIRED:
2530 case -NFS4ERR_CB_PATH_DOWN:
2531 nfs4_schedule_state_recovery(clp);
2532 }
2533 return;
2534 }
2535 spin_lock(&clp->cl_lock);
2536 if (time_before(clp->cl_last_renewal,timestamp))
2537 clp->cl_last_renewal = timestamp;
2538 spin_unlock(&clp->cl_lock);
2539}
2540
963d8fe5
TM		 2541static const struct rpc_call_ops nfs4_renew_ops = {
2542 .rpc_call_done = nfs4_renew_done,
2543};
2544
adfa6f98 2545int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2546{
2547 struct rpc_message msg = {
2548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2549 .rpc_argp = clp,
b4454fe1 2550 .rpc_cred = cred,
1da177e4
LT		 2551 };
2552
2553 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2554 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2555}
2556
adfa6f98 2557int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2558{
2559 struct rpc_message msg = {
2560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2561 .rpc_argp = clp,
b4454fe1 2562 .rpc_cred = cred,
1da177e4
LT		 2563 };
2564 unsigned long now = jiffies;
2565 int status;
2566
2567 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2568 if (status < 0)
2569 return status;
2570 spin_lock(&clp->cl_lock);
2571 if (time_before(clp->cl_last_renewal,now))
2572 clp->cl_last_renewal = now;
2573 spin_unlock(&clp->cl_lock);
2574 return 0;
2575}
2576
aa1870af
BF		 2577static inline int nfs4_server_supports_acls(struct nfs_server *server)
2578{
2579 return (server->caps & NFS_CAP_ACLS)
2580 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2581 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2582}
2583
2584/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2585 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2586 * the stack.
2587 */
2588#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2589
2590static void buf_to_pages(const void *buf, size_t buflen,
2591 struct page **pages, unsigned int *pgbase)
2592{
2593 const void *p = buf;
2594
2595 *pgbase = offset_in_page(buf);
2596 p -= *pgbase;
2597 while (p < buf + buflen) {
2598 *(pages++) = virt_to_page(p);
2599 p += PAGE_CACHE_SIZE;
2600 }
2601}
2602
e50a1c2e
BF		 2603struct nfs4_cached_acl {
2604 int cached;
2605 size_t len;
3e9d4154 2606 char data[0];
e50a1c2e
BF		 2607};
2608
2609static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2610{
2611 struct nfs_inode *nfsi = NFS_I(inode);
2612
2613 spin_lock(&inode->i_lock);
2614 kfree(nfsi->nfs4_acl);
2615 nfsi->nfs4_acl = acl;
2616 spin_unlock(&inode->i_lock);
2617}
2618
2619static void nfs4_zap_acl_attr(struct inode *inode)
2620{
2621 nfs4_set_cached_acl(inode, NULL);
2622}
2623
2624static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2625{
2626 struct nfs_inode *nfsi = NFS_I(inode);
2627 struct nfs4_cached_acl *acl;
2628 int ret = -ENOENT;
2629
2630 spin_lock(&inode->i_lock);
2631 acl = nfsi->nfs4_acl;
2632 if (acl == NULL)
2633 goto out;
2634 if (buf == NULL) /* user is just asking for length */
2635 goto out_len;
2636 if (acl->cached == 0)
2637 goto out;
2638 ret = -ERANGE; /* see getxattr(2) man page */
2639 if (acl->len > buflen)
2640 goto out;
2641 memcpy(buf, acl->data, acl->len);
2642out_len:
2643 ret = acl->len;
2644out:
2645 spin_unlock(&inode->i_lock);
2646 return ret;
2647}
2648
2649static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2650{
2651 struct nfs4_cached_acl *acl;
2652
2653 if (buf && acl_len <= PAGE_SIZE) {
2654 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2655 if (acl == NULL)
2656 goto out;
2657 acl->cached = 1;
2658 memcpy(acl->data, buf, acl_len);
2659 } else {
2660 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2661 if (acl == NULL)
2662 goto out;
2663 acl->cached = 0;
2664 }
2665 acl->len = acl_len;
2666out:
2667 nfs4_set_cached_acl(inode, acl);
2668}
2669
16b4289c 2670static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2671{
aa1870af
BF		 2672 struct page *pages[NFS4ACL_MAXPAGES];
2673 struct nfs_getaclargs args = {
2674 .fh = NFS_FH(inode),
2675 .acl_pages = pages,
2676 .acl_len = buflen,
2677 };
2678 size_t resp_len = buflen;
e50a1c2e 2679 void *resp_buf;
aa1870af
BF		 2680 struct rpc_message msg = {
2681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2682 .rpc_argp = &args,
2683 .rpc_resp = &resp_len,
2684 };
e50a1c2e 2685 struct page *localpage = NULL;
aa1870af
BF		 2686 int ret;
2687
e50a1c2e
BF		 2688 if (buflen < PAGE_SIZE) {
2689 /* As long as we're doing a round trip to the server anyway,
2690 * let's be prepared for a page of acl data. */
2691 localpage = alloc_page(GFP_KERNEL);
2692 resp_buf = page_address(localpage);
2693 if (localpage == NULL)
2694 return -ENOMEM;
2695 args.acl_pages[0] = localpage;
2696 args.acl_pgbase = 0;
1d95db8e 2697 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2698 } else {
2699 resp_buf = buf;
2700 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2701 }
aa1870af 2702 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2703 if (ret)
2704 goto out_free;
2705 if (resp_len > args.acl_len)
2706 nfs4_write_cached_acl(inode, NULL, resp_len);
2707 else
2708 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2709 if (buf) {
2710 ret = -ERANGE;
2711 if (resp_len > buflen)
2712 goto out_free;
2713 if (localpage)
2714 memcpy(buf, resp_buf, resp_len);
2715 }
2716 ret = resp_len;
2717out_free:
2718 if (localpage)
2719 __free_page(localpage);
aa1870af
BF		 2720 return ret;
2721}
2722
16b4289c
TM		 2723static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2724{
2725 struct nfs4_exception exception = { };
2726 ssize_t ret;
2727 do {
2728 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2729 if (ret >= 0)
2730 break;
2731 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2732 } while (exception.retry);
2733 return ret;
2734}
2735
e50a1c2e
BF		 2736static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2737{
2738 struct nfs_server *server = NFS_SERVER(inode);
2739 int ret;
2740
2741 if (!nfs4_server_supports_acls(server))
2742 return -EOPNOTSUPP;
2743 ret = nfs_revalidate_inode(server, inode);
2744 if (ret < 0)
2745 return ret;
2746 ret = nfs4_read_cached_acl(inode, buf, buflen);
2747 if (ret != -ENOENT)
2748 return ret;
2749 return nfs4_get_acl_uncached(inode, buf, buflen);
2750}
2751
16b4289c 2752static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2753{
2754 struct nfs_server *server = NFS_SERVER(inode);
2755 struct page *pages[NFS4ACL_MAXPAGES];
2756 struct nfs_setaclargs arg = {
2757 .fh = NFS_FH(inode),
2758 .acl_pages = pages,
2759 .acl_len = buflen,
2760 };
2761 struct rpc_message msg = {
2762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2763 .rpc_argp = &arg,
2764 .rpc_resp = NULL,
2765 };
2766 int ret;
2767
2768 if (!nfs4_server_supports_acls(server))
2769 return -EOPNOTSUPP;
642ac549 2770 nfs_inode_return_delegation(inode);
4b580ee3 2771 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2772 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
08efa202 2773 nfs_zap_caches(inode);
4b580ee3
BF		 2774 return ret;
2775}
2776
16b4289c
TM		 2777static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2778{
2779 struct nfs4_exception exception = { };
2780 int err;
2781 do {
2782 err = nfs4_handle_exception(NFS_SERVER(inode),
2783 __nfs4_proc_set_acl(inode, buf, buflen),
2784 &exception);
2785 } while (exception.retry);
2786 return err;
2787}
2788
1da177e4 2789static int
faf5f49c 2790nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2791{
7539bbab 2792 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2793
2794 if (!clp || task->tk_status >= 0)
2795 return 0;
2796 switch(task->tk_status) {
2797 case -NFS4ERR_STALE_CLIENTID:
2798 case -NFS4ERR_STALE_STATEID:
2799 case -NFS4ERR_EXPIRED:
2800 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2801 nfs4_schedule_state_recovery(clp);
433fbe4c 2802 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2803 rpc_wake_up_task(task);
2804 task->tk_status = 0;
2805 return -EAGAIN;
1da177e4 2806 case -NFS4ERR_DELAY:
006ea73e
CL		 2807 nfs_inc_server_stats((struct nfs_server *) server,
2808 NFSIOS_DELAY);
2809 case -NFS4ERR_GRACE:
1da177e4
LT		 2810 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2811 task->tk_status = 0;
2812 return -EAGAIN;
2813 case -NFS4ERR_OLD_STATEID:
2814 task->tk_status = 0;
2815 return -EAGAIN;
2816 }
2817 task->tk_status = nfs4_map_errors(task->tk_status);
2818 return 0;
2819}
2820
433fbe4c
TM		 2821static int nfs4_wait_bit_interruptible(void *word)
2822{
2823 if (signal_pending(current))
2824 return -ERESTARTSYS;
2825 schedule();
2826 return 0;
2827}
2828
adfa6f98 2829static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2830{
1da177e4 2831 sigset_t oldset;
433fbe4c 2832 int res;
1da177e4
LT		 2833
2834 might_sleep();
2835
e148582e
TM		 2836 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2837
1da177e4 2838 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM		 2839 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2840 nfs4_wait_bit_interruptible,
2841 TASK_INTERRUPTIBLE);
1da177e4 2842 rpc_clnt_sigunmask(clnt, &oldset);
e148582e
TM		 2843
2844 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT		 2845 return res;
2846}
2847
2848static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2849{
2850 sigset_t oldset;
2851 int res = 0;
2852
2853 might_sleep();
2854
2855 if (*timeout <= 0)
2856 *timeout = NFS4_POLL_RETRY_MIN;
2857 if (*timeout > NFS4_POLL_RETRY_MAX)
2858 *timeout = NFS4_POLL_RETRY_MAX;
2859 rpc_clnt_sigmask(clnt, &oldset);
2860 if (clnt->cl_intr) {
041e0e3b 2861 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2862 if (signalled())
2863 res = -ERESTARTSYS;
041e0e3b
NA		 2864 } else
2865 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2866 rpc_clnt_sigunmask(clnt, &oldset);
2867 *timeout <<= 1;
2868 return res;
2869}
2870
2871/* This is the error handling routine for processes that are allowed
2872 * to sleep.
2873 */
10afec90 2874static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2875{
7539bbab 2876 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2877 int ret = errorcode;
2878
2879 exception->retry = 0;
2880 switch(errorcode) {
2881 case 0:
2882 return 0;
2883 case -NFS4ERR_STALE_CLIENTID:
2884 case -NFS4ERR_STALE_STATEID:
2885 case -NFS4ERR_EXPIRED:
433fbe4c 2886 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2887 ret = nfs4_wait_clnt_recover(server->client, clp);
2888 if (ret == 0)
2889 exception->retry = 1;
2890 break;
c514983d 2891 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2892 case -NFS4ERR_GRACE:
2893 case -NFS4ERR_DELAY:
2894 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2895 if (ret != 0)
2896 break;
1da177e4 2897 case -NFS4ERR_OLD_STATEID:
2c56617d 2898 exception->retry = 1;
1da177e4
LT		 2899 }
2900 /* We failed to handle the error */
2901 return nfs4_map_errors(ret);
2902}
2903
adfa6f98 2904int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2905{
2906 nfs4_verifier sc_verifier;
2907 struct nfs4_setclientid setclientid = {
2908 .sc_verifier = &sc_verifier,
2909 .sc_prog = program,
2910 };
2911 struct rpc_message msg = {
2912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2913 .rpc_argp = &setclientid,
2914 .rpc_resp = clp,
286d7d6a 2915 .rpc_cred = cred,
1da177e4 2916 };
bc4785cd 2917 __be32 *p;
1da177e4
LT		 2918 int loop = 0;
2919 int status;
2920
bc4785cd 2921 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2922 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2923 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2924
2925 for(;;) {
2926 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2927 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
24c8dbbb 2928 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
286d7d6a 2929 cred->cr_ops->cr_name,
1da177e4
LT		 2930 clp->cl_id_uniquifier);
2931 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2932 sizeof(setclientid.sc_netid), "tcp");
2933 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2934 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2935 clp->cl_ipaddr, port >> 8, port & 255);
2936
2937 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2938 if (status != -NFS4ERR_CLID_INUSE)
2939 break;
2940 if (signalled())
2941 break;
2942 if (loop++ & 1)
2943 ssleep(clp->cl_lease_time + 1);
2944 else
2945 if (++clp->cl_id_uniquifier == 0)
2946 break;
2947 }
2948 return status;
2949}
2950
adfa6f98 2951static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2952{
2953 struct nfs_fsinfo fsinfo;
2954 struct rpc_message msg = {
2955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2956 .rpc_argp = clp,
2957 .rpc_resp = &fsinfo,
286d7d6a 2958 .rpc_cred = cred,
1da177e4
LT		 2959 };
2960 unsigned long now;
2961 int status;
2962
2963 now = jiffies;
2964 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2965 if (status == 0) {
2966 spin_lock(&clp->cl_lock);
2967 clp->cl_lease_time = fsinfo.lease_time * HZ;
2968 clp->cl_last_renewal = now;
58d9714a 2969 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2970 spin_unlock(&clp->cl_lock);
2971 }
2972 return status;
2973}
2974
adfa6f98 2975int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM		 2976{
2977 long timeout;
2978 int err;
2979 do {
2980 err = _nfs4_proc_setclientid_confirm(clp, cred);
2981 switch (err) {
2982 case 0:
2983 return err;
2984 case -NFS4ERR_RESOURCE:
2985 /* The IBM lawyers misread another document! */
2986 case -NFS4ERR_DELAY:
2987 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2988 }
2989 } while (err == 0);
2990 return err;
2991}
2992
fe650407
TM		 2993struct nfs4_delegreturndata {
2994 struct nfs4_delegreturnargs args;
fa178f29 2995 struct nfs4_delegreturnres res;
fe650407
TM		 2996 struct nfs_fh fh;
2997 nfs4_stateid stateid;
2998 struct rpc_cred *cred;
26e976a8 2999 unsigned long timestamp;
fa178f29 3000 struct nfs_fattr fattr;
fe650407
TM		 3001 int rpc_status;
3002};
3003
3004static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 3005{
fe650407 3006 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT		 3007 struct rpc_message msg = {
3008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407 3009 .rpc_argp = &data->args,
fa178f29 3010 .rpc_resp = &data->res,
fe650407 3011 .rpc_cred = data->cred,
1da177e4 3012 };
fa178f29 3013 nfs_fattr_init(data->res.fattr);
fe650407
TM		 3014 rpc_call_setup(task, &msg, 0);
3015}
1da177e4 3016
fe650407
TM		 3017static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3018{
3019 struct nfs4_delegreturndata *data = calldata;
3020 data->rpc_status = task->tk_status;
26e976a8 3021 if (data->rpc_status == 0)
fa178f29 3022 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3023}
3024
3025static void nfs4_delegreturn_release(void *calldata)
3026{
3027 struct nfs4_delegreturndata *data = calldata;
3028
3029 put_rpccred(data->cred);
3030 kfree(calldata);
3031}
3032
c8d149f3 3033static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3034 .rpc_call_prepare = nfs4_delegreturn_prepare,
3035 .rpc_call_done = nfs4_delegreturn_done,
3036 .rpc_release = nfs4_delegreturn_release,
3037};
3038
3039static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3040{
3041 struct nfs4_delegreturndata *data;
fa178f29 3042 struct nfs_server *server = NFS_SERVER(inode);
fe650407
TM		 3043 struct rpc_task *task;
3044 int status;
3045
3046 data = kmalloc(sizeof(*data), GFP_KERNEL);
3047 if (data == NULL)
3048 return -ENOMEM;
3049 data->args.fhandle = &data->fh;
3050 data->args.stateid = &data->stateid;
fa178f29 3051 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3052 nfs_copy_fh(&data->fh, NFS_FH(inode));
3053 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3054 data->res.fattr = &data->fattr;
3055 data->res.server = server;
fe650407 3056 data->cred = get_rpccred(cred);
26e976a8 3057 data->timestamp = jiffies;
fe650407
TM		 3058 data->rpc_status = 0;
3059
3060 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
7a1218a2 3061 if (IS_ERR(task))
fe650407 3062 return PTR_ERR(task);
fe650407 3063 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 3064 if (status == 0) {
fe650407 3065 status = data->rpc_status;
fa178f29
TM		 3066 if (status == 0)
3067 nfs_post_op_update_inode(inode, &data->fattr);
3068 }
e6b3c4db 3069 rpc_put_task(task);
fe650407 3070 return status;
1da177e4
LT		 3071}
3072
3073int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3074{
3075 struct nfs_server *server = NFS_SERVER(inode);
3076 struct nfs4_exception exception = { };
3077 int err;
3078 do {
3079 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3080 switch (err) {
3081 case -NFS4ERR_STALE_STATEID:
3082 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3083 case 0:
3084 return 0;
3085 }
3086 err = nfs4_handle_exception(server, err, &exception);
3087 } while (exception.retry);
3088 return err;
3089}
3090
3091#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3092#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3093
3094/*
3095 * sleep, with exponential backoff, and retry the LOCK operation.
3096 */
3097static unsigned long
3098nfs4_set_lock_task_retry(unsigned long timeout)
3099{
041e0e3b 3100 schedule_timeout_interruptible(timeout);
1da177e4
LT		 3101 timeout <<= 1;
3102 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3103 return NFS4_LOCK_MAXTIMEOUT;
3104 return timeout;
3105}
3106
1da177e4
LT		 3107static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3108{
3109 struct inode *inode = state->inode;
3110 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3111 struct nfs_client *clp = server->nfs_client;
911d1aaf 3112 struct nfs_lockt_args arg = {
1da177e4 3113 .fh = NFS_FH(inode),
911d1aaf 3114 .fl = request,
1da177e4 3115 };
911d1aaf
TM		 3116 struct nfs_lockt_res res = {
3117 .denied = request,
1da177e4
LT		 3118 };
3119 struct rpc_message msg = {
3120 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3121 .rpc_argp = &arg,
3122 .rpc_resp = &res,
3123 .rpc_cred = state->owner->so_cred,
3124 };
1da177e4
LT		 3125 struct nfs4_lock_state *lsp;
3126 int status;
3127
3128 down_read(&clp->cl_sem);
911d1aaf 3129 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3130 status = nfs4_set_lock_state(state, request);
3131 if (status != 0)
3132 goto out;
3133 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3134 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3135 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3136 switch (status) {
3137 case 0:
3138 request->fl_type = F_UNLCK;
3139 break;
3140 case -NFS4ERR_DENIED:
3141 status = 0;
1da177e4 3142 }
70cc6487 3143 request->fl_ops->fl_release_private(request);
8d0a8a9d 3144out:
1da177e4
LT		 3145 up_read(&clp->cl_sem);
3146 return status;
3147}
3148
3149static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3150{
3151 struct nfs4_exception exception = { };
3152 int err;
3153
3154 do {
3155 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3156 _nfs4_proc_getlk(state, cmd, request),
3157 &exception);
3158 } while (exception.retry);
3159 return err;
3160}
3161
3162static int do_vfs_lock(struct file *file, struct file_lock *fl)
3163{
3164 int res = 0;
3165 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3166 case FL_POSIX:
3167 res = posix_lock_file_wait(file, fl);
3168 break;
3169 case FL_FLOCK:
3170 res = flock_lock_file_wait(file, fl);
3171 break;
3172 default:
3173 BUG();
3174 }
1da177e4
LT		 3175 return res;
3176}
3177
faf5f49c 3178struct nfs4_unlockdata {
911d1aaf
TM		 3179 struct nfs_locku_args arg;
3180 struct nfs_locku_res res;
faf5f49c
TM		 3181 struct nfs4_lock_state *lsp;
3182 struct nfs_open_context *ctx;
911d1aaf
TM		 3183 struct file_lock fl;
3184 const struct nfs_server *server;
26e976a8 3185 unsigned long timestamp;
faf5f49c
TM		 3186};
3187
911d1aaf
TM		 3188static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3189 struct nfs_open_context *ctx,
3190 struct nfs4_lock_state *lsp,
3191 struct nfs_seqid *seqid)
3192{
3193 struct nfs4_unlockdata *p;
3194 struct inode *inode = lsp->ls_state->inode;
3195
3196 p = kmalloc(sizeof(*p), GFP_KERNEL);
3197 if (p == NULL)
3198 return NULL;
3199 p->arg.fh = NFS_FH(inode);
3200 p->arg.fl = &p->fl;
3201 p->arg.seqid = seqid;
3202 p->arg.stateid = &lsp->ls_stateid;
3203 p->lsp = lsp;
3204 atomic_inc(&lsp->ls_count);
3205 /* Ensure we don't close file until we're done freeing locks! */
3206 p->ctx = get_nfs_open_context(ctx);
3207 memcpy(&p->fl, fl, sizeof(p->fl));
3208 p->server = NFS_SERVER(inode);
3209 return p;
3210}
3211
06f814a3 3212static void nfs4_locku_release_calldata(void *data)
faf5f49c 3213{
963d8fe5 3214 struct nfs4_unlockdata *calldata = data;
911d1aaf 3215 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3216 nfs4_put_lock_state(calldata->lsp);
3217 put_nfs_open_context(calldata->ctx);
3218 kfree(calldata);
faf5f49c
TM		 3219}
3220
963d8fe5 3221static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3222{
963d8fe5 3223 struct nfs4_unlockdata *calldata = data;
faf5f49c 3224
06f814a3
TM		 3225 if (RPC_ASSASSINATED(task))
3226 return;
911d1aaf 3227 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3228 switch (task->tk_status) {
3229 case 0:
3230 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3231 calldata->res.stateid.data,
faf5f49c 3232 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3233 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3234 break;
3235 case -NFS4ERR_STALE_STATEID:
3236 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3237 break;
3238 default:
a6a352e9 3239 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
faf5f49c 3240 rpc_restart_call(task);
faf5f49c 3241 }
faf5f49c
TM		 3242}
3243
4ce70ada 3244static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3245{
4ce70ada 3246 struct nfs4_unlockdata *calldata = data;
1da177e4
LT		 3247 struct rpc_message msg = {
3248 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM		 3249 .rpc_argp = &calldata->arg,
3250 .rpc_resp = &calldata->res,
3251 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3252 };
faf5f49c 3253
911d1aaf 3254 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3255 return;
3256 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3257 /* Note: exit _without_ running nfs4_locku_done */
3258 task->tk_action = NULL;
faf5f49c
TM		 3259 return;
3260 }
26e976a8 3261 calldata->timestamp = jiffies;
faf5f49c
TM		 3262 rpc_call_setup(task, &msg, 0);
3263}
3264
963d8fe5 3265static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3266 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3267 .rpc_call_done = nfs4_locku_done,
06f814a3 3268 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3269};
3270
a5d16a4d
TM		 3271static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3272 struct nfs_open_context *ctx,
3273 struct nfs4_lock_state *lsp,
3274 struct nfs_seqid *seqid)
3275{
3276 struct nfs4_unlockdata *data;
a5d16a4d
TM		 3277
3278 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3279 if (data == NULL) {
3280 nfs_free_seqid(seqid);
3281 return ERR_PTR(-ENOMEM);
3282 }
3283
7a1218a2 3284 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
a5d16a4d
TM		 3285}
3286
faf5f49c
TM		 3287static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3288{
911d1aaf 3289 struct nfs_seqid *seqid;
1da177e4 3290 struct nfs4_lock_state *lsp;
06f814a3
TM		 3291 struct rpc_task *task;
3292 int status = 0;
faf5f49c 3293
8d0a8a9d 3294 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3295 /* Unlock _before_ we do the RPC call */
3296 request->fl_flags |= FL_EXISTS;
3297 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3298 goto out;
8d0a8a9d 3299 if (status != 0)
9b073574
TM		 3300 goto out;
3301 /* Is this a delegated lock? */
3302 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3303 goto out;
8d0a8a9d 3304 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3305 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3306 status = -ENOMEM;
911d1aaf 3307 if (seqid == NULL)
9b073574 3308 goto out;
a5d16a4d
TM		 3309 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3310 status = PTR_ERR(task);
3311 if (IS_ERR(task))
9b073574 3312 goto out;
a5d16a4d 3313 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3314 rpc_put_task(task);
9b073574 3315out:
1da177e4
LT		 3316 return status;
3317}
3318
a5d16a4d
TM		 3319struct nfs4_lockdata {
3320 struct nfs_lock_args arg;
3321 struct nfs_lock_res res;
3322 struct nfs4_lock_state *lsp;
3323 struct nfs_open_context *ctx;
3324 struct file_lock fl;
26e976a8 3325 unsigned long timestamp;
a5d16a4d
TM		 3326 int rpc_status;
3327 int cancelled;
3328};
3329
3330static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3331 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3332{
a5d16a4d
TM		 3333 struct nfs4_lockdata *p;
3334 struct inode *inode = lsp->ls_state->inode;
1da177e4 3335 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3336
3337 p = kzalloc(sizeof(*p), GFP_KERNEL);
3338 if (p == NULL)
3339 return NULL;
3340
3341 p->arg.fh = NFS_FH(inode);
3342 p->arg.fl = &p->fl;
3343 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3344 if (p->arg.lock_seqid == NULL)
3345 goto out_free;
3346 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3347 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3348 p->arg.lock_owner.id = lsp->ls_id.id;
a5d16a4d
TM		 3349 p->lsp = lsp;
3350 atomic_inc(&lsp->ls_count);
3351 p->ctx = get_nfs_open_context(ctx);
3352 memcpy(&p->fl, fl, sizeof(p->fl));
3353 return p;
3354out_free:
3355 kfree(p);
3356 return NULL;
3357}
3358
3359static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3360{
3361 struct nfs4_lockdata *data = calldata;
3362 struct nfs4_state *state = data->lsp->ls_state;
3363 struct nfs4_state_owner *sp = state->owner;
1da177e4 3364 struct rpc_message msg = {
a5d16a4d
TM		 3365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3366 .rpc_argp = &data->arg,
3367 .rpc_resp = &data->res,
3368 .rpc_cred = sp->so_cred,
1da177e4 3369 };
06735b34 3370
a5d16a4d
TM		 3371 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3372 return;
3373 dprintk("%s: begin!\n", __FUNCTION__);
3374 /* Do we need to do an open_to_lock_owner? */
3375 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3376 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3377 if (data->arg.open_seqid == NULL) {
3378 data->rpc_status = -ENOMEM;
3379 task->tk_action = NULL;
06735b34 3380 goto out;
8d0a8a9d 3381 }
a5d16a4d
TM		 3382 data->arg.open_stateid = &state->stateid;
3383 data->arg.new_lock_owner = 1;
3384 }
26e976a8 3385 data->timestamp = jiffies;
a5d16a4d 3386 rpc_call_setup(task, &msg, 0);
06735b34 3387out:
a5d16a4d
TM		 3388 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3389}
3390
3391static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3392{
3393 struct nfs4_lockdata *data = calldata;
3394
3395 dprintk("%s: begin!\n", __FUNCTION__);
3396
3397 data->rpc_status = task->tk_status;
3398 if (RPC_ASSASSINATED(task))
3399 goto out;
3400 if (data->arg.new_lock_owner != 0) {
3401 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3402 if (data->rpc_status == 0)
3403 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3404 else
3405 goto out;
3406 }
3407 if (data->rpc_status == 0) {
3408 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3409 sizeof(data->lsp->ls_stateid.data));
3410 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3411 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3412 }
3413 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3414out:
3415 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3416}
3417
3418static void nfs4_lock_release(void *calldata)
3419{
3420 struct nfs4_lockdata *data = calldata;
3421
3422 dprintk("%s: begin!\n", __FUNCTION__);
3423 if (data->arg.open_seqid != NULL)
3424 nfs_free_seqid(data->arg.open_seqid);
3425 if (data->cancelled != 0) {
3426 struct rpc_task *task;
3427 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3428 data->arg.lock_seqid);
3429 if (!IS_ERR(task))
e6b3c4db 3430 rpc_put_task(task);
a5d16a4d
TM		 3431 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3432 } else
3433 nfs_free_seqid(data->arg.lock_seqid);
3434 nfs4_put_lock_state(data->lsp);
3435 put_nfs_open_context(data->ctx);
3436 kfree(data);
3437 dprintk("%s: done!\n", __FUNCTION__);
3438}
3439
3440static const struct rpc_call_ops nfs4_lock_ops = {
3441 .rpc_call_prepare = nfs4_lock_prepare,
3442 .rpc_call_done = nfs4_lock_done,
3443 .rpc_release = nfs4_lock_release,
3444};
3445
3446static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3447{
3448 struct nfs4_lockdata *data;
3449 struct rpc_task *task;
3450 int ret;
3451
3452 dprintk("%s: begin!\n", __FUNCTION__);
3453 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3454 fl->fl_u.nfs4_fl.owner);
3455 if (data == NULL)
3456 return -ENOMEM;
3457 if (IS_SETLKW(cmd))
3458 data->arg.block = 1;
3459 if (reclaim != 0)
3460 data->arg.reclaim = 1;
3461 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3462 &nfs4_lock_ops, data);
7a1218a2 3463 if (IS_ERR(task))
a5d16a4d 3464 return PTR_ERR(task);
a5d16a4d
TM		 3465 ret = nfs4_wait_for_completion_rpc_task(task);
3466 if (ret == 0) {
3467 ret = data->rpc_status;
3468 if (ret == -NFS4ERR_DENIED)
3469 ret = -EAGAIN;
3470 } else
3471 data->cancelled = 1;
e6b3c4db 3472 rpc_put_task(task);
a5d16a4d
TM		 3473 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3474 return ret;
1da177e4
LT		 3475}
3476
3477static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3478{
202b50dc
TM		 3479 struct nfs_server *server = NFS_SERVER(state->inode);
3480 struct nfs4_exception exception = { };
3481 int err;
3482
3483 do {
42a2d13e
TM		 3484 /* Cache the lock if possible... */
3485 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3486 return 0;
202b50dc
TM		 3487 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3488 if (err != -NFS4ERR_DELAY)
3489 break;
3490 nfs4_handle_exception(server, err, &exception);
3491 } while (exception.retry);
3492 return err;
1da177e4
LT		 3493}
3494
3495static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3496{
202b50dc
TM		 3497 struct nfs_server *server = NFS_SERVER(state->inode);
3498 struct nfs4_exception exception = { };
3499 int err;
3500
6bfc93ef
TM		 3501 err = nfs4_set_lock_state(state, request);
3502 if (err != 0)
3503 return err;
202b50dc 3504 do {
42a2d13e
TM		 3505 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3506 return 0;
202b50dc
TM		 3507 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3508 if (err != -NFS4ERR_DELAY)
3509 break;
3510 nfs4_handle_exception(server, err, &exception);
3511 } while (exception.retry);
3512 return err;
1da177e4
LT		 3513}
3514
3515static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3516{
adfa6f98 3517 struct nfs_client *clp = state->owner->so_client;
01c3b861 3518 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3519 int status;
3520
6bfc93ef 3521 /* Is this a delegated open? */
6bfc93ef
TM		 3522 status = nfs4_set_lock_state(state, request);
3523 if (status != 0)
3524 goto out;
01c3b861
TM		 3525 request->fl_flags |= FL_ACCESS;
3526 status = do_vfs_lock(request->fl_file, request);
3527 if (status < 0)
3528 goto out;
3529 down_read(&clp->cl_sem);
3530 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3531 struct nfs_inode *nfsi = NFS_I(state->inode);
3532 /* Yes: cache locks! */
3533 down_read(&nfsi->rwsem);
3534 /* ...but avoid races with delegation recall... */
3535 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3536 request->fl_flags = fl_flags & ~FL_SLEEP;
3537 status = do_vfs_lock(request->fl_file, request);
3538 up_read(&nfsi->rwsem);
3539 goto out_unlock;
3540 }
3541 up_read(&nfsi->rwsem);
3542 }
6bfc93ef
TM		 3543 status = _nfs4_do_setlk(state, cmd, request, 0);
3544 if (status != 0)
01c3b861 3545 goto out_unlock;
6bfc93ef 3546 /* Note: we always want to sleep here! */
01c3b861 3547 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef
TM		 3548 if (do_vfs_lock(request->fl_file, request) < 0)
3549 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
01c3b861 3550out_unlock:
1da177e4 3551 up_read(&clp->cl_sem);
01c3b861
TM		 3552out:
3553 request->fl_flags = fl_flags;
1da177e4
LT		 3554 return status;
3555}
3556
3557static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3558{
3559 struct nfs4_exception exception = { };
3560 int err;
3561
3562 do {
3563 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3564 _nfs4_proc_setlk(state, cmd, request),
3565 &exception);
3566 } while (exception.retry);
3567 return err;
3568}
3569
3570static int
3571nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3572{
3573 struct nfs_open_context *ctx;
3574 struct nfs4_state *state;
3575 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3576 int status;
3577
3578 /* verify open state */
3579 ctx = (struct nfs_open_context *)filp->private_data;
3580 state = ctx->state;
3581
3582 if (request->fl_start < 0 || request->fl_end < 0)
3583 return -EINVAL;
3584
3585 if (IS_GETLK(cmd))
3586 return nfs4_proc_getlk(state, F_GETLK, request);
3587
3588 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3589 return -EINVAL;
3590
3591 if (request->fl_type == F_UNLCK)
3592 return nfs4_proc_unlck(state, cmd, request);
3593
3594 do {
3595 status = nfs4_proc_setlk(state, cmd, request);
3596 if ((status != -EAGAIN) || IS_SETLK(cmd))
3597 break;
3598 timeout = nfs4_set_lock_task_retry(timeout);
3599 status = -ERESTARTSYS;
3600 if (signalled())
3601 break;
3602 } while(status < 0);
1da177e4
LT		 3603 return status;
3604}
3605
888e694c
TM		 3606int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3607{
3608 struct nfs_server *server = NFS_SERVER(state->inode);
3609 struct nfs4_exception exception = { };
3610 int err;
3611
3612 err = nfs4_set_lock_state(state, fl);
3613 if (err != 0)
3614 goto out;
3615 do {
3616 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3617 if (err != -NFS4ERR_DELAY)
3618 break;
3619 err = nfs4_handle_exception(server, err, &exception);
3620 } while (exception.retry);
3621out:
3622 return err;
3623}
6b3b5496 3624
aa1870af
BF		 3625#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3626
6b3b5496
BF		 3627int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3628 size_t buflen, int flags)
3629{
4b580ee3
BF		 3630 struct inode *inode = dentry->d_inode;
3631
3632 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3633 return -EOPNOTSUPP;
3634
3635 if (!S_ISREG(inode->i_mode) &&
3636 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3637 return -EPERM;
3638
3639 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3640}
3641
3642/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3643 * and that's what we'll do for e.g. user attributes that haven't been set.
3644 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3645 * attributes in kernel-managed attribute namespaces. */
3646ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3647 size_t buflen)
3648{
aa1870af
BF		 3649 struct inode *inode = dentry->d_inode;
3650
3651 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3652 return -EOPNOTSUPP;
3653
3654 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3655}
3656
3657ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3658{
aa1870af 3659 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3660
096455a2
BF		 3661 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3662 return 0;
6b3b5496
BF		 3663 if (buf && buflen < len)
3664 return -ERANGE;
3665 if (buf)
aa1870af
BF		 3666 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3667 return len;
6b3b5496
BF		 3668}
3669
c228fd3a 3670int nfs4_proc_fs_locations(struct inode *dir, struct qstr *name,
7aaa0b3b 3671 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3672{
3673 struct nfs_server *server = NFS_SERVER(dir);
3674 u32 bitmask[2] = {
361e624f
MN		 3675 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3676 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3677 };
3678 struct nfs4_fs_locations_arg args = {
3679 .dir_fh = NFS_FH(dir),
c228fd3a 3680 .name = name,
683b57b4
TM		 3681 .page = page,
3682 .bitmask = bitmask,
3683 };
3684 struct rpc_message msg = {
3685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3686 .rpc_argp = &args,
7aaa0b3b 3687 .rpc_resp = fs_locations,
683b57b4
TM		 3688 };
3689 int status;
3690
3691 dprintk("%s: start\n", __FUNCTION__);
c228fd3a 3692 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3693 fs_locations->server = server;
830b8e33 3694 fs_locations->nlocations = 0;
683b57b4
TM		 3695 status = rpc_call_sync(server->client, &msg, 0);
3696 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3697 return status;
3698}
3699
1da177e4
LT		 3700struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3701 .recover_open = nfs4_open_reclaim,
3702 .recover_lock = nfs4_lock_reclaim,
3703};
3704
3705struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3706 .recover_open = nfs4_open_expired,
3707 .recover_lock = nfs4_lock_expired,
3708};
3709
92e1d5be 3710static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3711 .permission = nfs_permission,
3712 .getattr = nfs_getattr,
3713 .setattr = nfs_setattr,
3714 .getxattr = nfs4_getxattr,
3715 .setxattr = nfs4_setxattr,
3716 .listxattr = nfs4_listxattr,
3717};
3718
509de811 3719const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3720 .version = 4, /* protocol version */
3721 .dentry_ops = &nfs4_dentry_operations,
3722 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3723 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3724 .getroot = nfs4_proc_get_root,
3725 .getattr = nfs4_proc_getattr,
3726 .setattr = nfs4_proc_setattr,
2b3de441 3727 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3728 .lookup = nfs4_proc_lookup,
3729 .access = nfs4_proc_access,
3730 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3731 .create = nfs4_proc_create,
3732 .remove = nfs4_proc_remove,
3733 .unlink_setup = nfs4_proc_unlink_setup,
3734 .unlink_done = nfs4_proc_unlink_done,
3735 .rename = nfs4_proc_rename,
3736 .link = nfs4_proc_link,
3737 .symlink = nfs4_proc_symlink,
3738 .mkdir = nfs4_proc_mkdir,
3739 .rmdir = nfs4_proc_remove,
3740 .readdir = nfs4_proc_readdir,
3741 .mknod = nfs4_proc_mknod,
3742 .statfs = nfs4_proc_statfs,
3743 .fsinfo = nfs4_proc_fsinfo,
3744 .pathconf = nfs4_proc_pathconf,
e9326dca 3745 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3746 .decode_dirent = nfs4_decode_dirent,
3747 .read_setup = nfs4_proc_read_setup,
ec06c096 3748 .read_done = nfs4_read_done,
1da177e4 3749 .write_setup = nfs4_proc_write_setup,
788e7a89 3750 .write_done = nfs4_write_done,
1da177e4 3751 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3752 .commit_done = nfs4_commit_done,
02a913a7
TM		 3753 .file_open = nfs_open,
3754 .file_release = nfs_release,
1da177e4 3755 .lock = nfs4_proc_lock,
e50a1c2e 3756 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3757};
3758
3759/*
3760 * Local variables:
3761 * c-basic-offset: 8
3762 * End:
3763 */
Linux 6.x block layer and io_uring tree(s)