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[net-next-2.6.git] / fs / nfs / nfs4proc.c
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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 *);
faf5f49c 65static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
adfa6f98 66static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
9936781d
TM		 67static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
68static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
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 */
4e769b93 178 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 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 */
4e769b93 190 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 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 210 spin_lock(&dir->i_lock);
17cadc95
TM		 211 if (cinfo->after != nfsi->change_attr) {
212 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
213 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
214 nfsi->cache_change_attribute = jiffies;
1da177e4 215 nfsi->change_attr = cinfo->after;
17cadc95 216 }
38478b24 217 spin_unlock(&dir->i_lock);
1da177e4
LT		 218}
219
e56e0b78 220struct nfs4_opendata {
c6d00e63 221 struct kref kref;
e56e0b78
TM		 222 struct nfs_openargs o_arg;
223 struct nfs_openres o_res;
cdd4e68b
TM		 224 struct nfs_open_confirmargs c_arg;
225 struct nfs_open_confirmres c_res;
e56e0b78
TM		 226 struct nfs_fattr f_attr;
227 struct nfs_fattr dir_attr;
ad389da7 228 struct path path;
e56e0b78
TM		 229 struct dentry *dir;
230 struct nfs4_state_owner *owner;
aac00a8d 231 struct nfs4_state *state;
e56e0b78 232 struct iattr attrs;
26e976a8 233 unsigned long timestamp;
3e309914 234 unsigned int rpc_done : 1;
24ac23ab
TM		 235 int rpc_status;
236 int cancelled;
e56e0b78
TM		 237};
238
2ced46c2
TM		 239
240static void nfs4_init_opendata_res(struct nfs4_opendata *p)
241{
242 p->o_res.f_attr = &p->f_attr;
243 p->o_res.dir_attr = &p->dir_attr;
244 p->o_res.server = p->o_arg.server;
245 nfs_fattr_init(&p->f_attr);
246 nfs_fattr_init(&p->dir_attr);
247}
248
ad389da7 249static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
e56e0b78
TM		 250 struct nfs4_state_owner *sp, int flags,
251 const struct iattr *attrs)
252{
ad389da7 253 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 254 struct inode *dir = parent->d_inode;
255 struct nfs_server *server = NFS_SERVER(dir);
256 struct nfs4_opendata *p;
257
258 p = kzalloc(sizeof(*p), GFP_KERNEL);
259 if (p == NULL)
260 goto err;
261 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
262 if (p->o_arg.seqid == NULL)
263 goto err_free;
ad389da7
TM		 264 p->path.mnt = mntget(path->mnt);
265 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 266 p->dir = parent;
267 p->owner = sp;
268 atomic_inc(&sp->so_count);
269 p->o_arg.fh = NFS_FH(dir);
270 p->o_arg.open_flags = flags,
7539bbab 271 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 272 p->o_arg.id = sp->so_owner_id.id;
ad389da7 273 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 274 p->o_arg.server = server;
275 p->o_arg.bitmask = server->attr_bitmask;
276 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 277 if (flags & O_EXCL) {
278 u32 *s = (u32 *) p->o_arg.u.verifier.data;
279 s[0] = jiffies;
280 s[1] = current->pid;
281 } else if (flags & O_CREAT) {
282 p->o_arg.u.attrs = &p->attrs;
283 memcpy(&p->attrs, attrs, sizeof(p->attrs));
284 }
cdd4e68b
TM		 285 p->c_arg.fh = &p->o_res.fh;
286 p->c_arg.stateid = &p->o_res.stateid;
287 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 288 nfs4_init_opendata_res(p);
c6d00e63 289 kref_init(&p->kref);
e56e0b78
TM		 290 return p;
291err_free:
292 kfree(p);
293err:
294 dput(parent);
295 return NULL;
296}
297
c6d00e63 298static void nfs4_opendata_free(struct kref *kref)
e56e0b78 299{
c6d00e63
TM		 300 struct nfs4_opendata *p = container_of(kref,
301 struct nfs4_opendata, kref);
302
303 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 304 if (p->state != NULL)
305 nfs4_put_open_state(p->state);
c6d00e63
TM		 306 nfs4_put_state_owner(p->owner);
307 dput(p->dir);
308 dput(p->path.dentry);
309 mntput(p->path.mnt);
310 kfree(p);
311}
312
313static void nfs4_opendata_put(struct nfs4_opendata *p)
314{
315 if (p != NULL)
316 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 317}
318
06f814a3
TM		 319static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
320{
321 sigset_t oldset;
322 int ret;
323
324 rpc_clnt_sigmask(task->tk_client, &oldset);
325 ret = rpc_wait_for_completion_task(task);
326 rpc_clnt_sigunmask(task->tk_client, &oldset);
327 return ret;
328}
329
6ee41268
TM		 330static int can_open_cached(struct nfs4_state *state, int mode)
331{
332 int ret = 0;
333 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
334 case FMODE_READ:
335 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 336 break;
337 case FMODE_WRITE:
338 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 339 break;
340 case FMODE_READ|FMODE_WRITE:
341 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
342 }
343 return ret;
344}
345
aac00a8d
TM		 346static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
347{
348 if ((delegation->type & open_flags) != open_flags)
349 return 0;
350 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
351 return 0;
352 return 1;
353}
354
003707c7 355static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
e7616923
TM		 356{
357 switch (open_flags) {
358 case FMODE_WRITE:
359 state->n_wronly++;
360 break;
361 case FMODE_READ:
362 state->n_rdonly++;
363 break;
364 case FMODE_READ|FMODE_WRITE:
365 state->n_rdwr++;
366 }
003707c7
TM		 367 nfs4_state_set_mode_locked(state, state->state | open_flags);
368}
369
370static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
371{
372 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
373 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
374 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
375 switch (open_flags) {
376 case FMODE_READ:
377 set_bit(NFS_O_RDONLY_STATE, &state->flags);
378 break;
379 case FMODE_WRITE:
380 set_bit(NFS_O_WRONLY_STATE, &state->flags);
381 break;
382 case FMODE_READ|FMODE_WRITE:
383 set_bit(NFS_O_RDWR_STATE, &state->flags);
384 }
e7616923
TM		 385}
386
003707c7
TM		 387static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
388{
8bda4e4c 389 write_seqlock(&state->seqlock);
003707c7 390 nfs_set_open_stateid_locked(state, stateid, open_flags);
8bda4e4c 391 write_sequnlock(&state->seqlock);
003707c7
TM		 392}
393
394static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
1da177e4 395{
1da177e4 396 open_flags &= (FMODE_READ|FMODE_WRITE);
8bda4e4c
TM		 397 /*
398 * Protect the call to nfs4_state_set_mode_locked and
399 * serialise the stateid update
400 */
401 write_seqlock(&state->seqlock);
003707c7
TM		 402 if (deleg_stateid != NULL) {
403 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
404 set_bit(NFS_DELEGATED_STATE, &state->flags);
405 }
406 if (open_stateid != NULL)
407 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
8bda4e4c
TM		 408 write_sequnlock(&state->seqlock);
409 spin_lock(&state->owner->so_lock);
e7616923 410 update_open_stateflags(state, open_flags);
ec073428 411 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 412}
413
aac00a8d
TM		 414static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
415{
416 struct nfs_delegation *delegation;
417
418 rcu_read_lock();
419 delegation = rcu_dereference(NFS_I(inode)->delegation);
420 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
421 rcu_read_unlock();
422 return;
423 }
424 rcu_read_unlock();
425 nfs_inode_return_delegation(inode);
426}
427
6ee41268 428static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 429{
430 struct nfs4_state *state = opendata->state;
431 struct nfs_inode *nfsi = NFS_I(state->inode);
432 struct nfs_delegation *delegation;
433 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
434 nfs4_stateid stateid;
435 int ret = -EAGAIN;
436
437 rcu_read_lock();
438 delegation = rcu_dereference(nfsi->delegation);
aac00a8d 439 for (;;) {
6ee41268
TM		 440 if (can_open_cached(state, open_mode)) {
441 spin_lock(&state->owner->so_lock);
442 if (can_open_cached(state, open_mode)) {
443 update_open_stateflags(state, open_mode);
444 spin_unlock(&state->owner->so_lock);
445 rcu_read_unlock();
446 goto out_return_state;
447 }
448 spin_unlock(&state->owner->so_lock);
449 }
450 if (delegation == NULL)
451 break;
aac00a8d
TM		 452 if (!can_open_delegated(delegation, open_mode))
453 break;
454 /* Save the delegation */
455 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
456 rcu_read_unlock();
457 lock_kernel();
af22f94a 458 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 459 unlock_kernel();
460 if (ret != 0)
461 goto out;
462 ret = -EAGAIN;
463 rcu_read_lock();
464 delegation = rcu_dereference(nfsi->delegation);
6ee41268 465 /* If no delegation, try a cached open */
aac00a8d 466 if (delegation == NULL)
6ee41268 467 continue;
aac00a8d
TM		 468 /* Is the delegation still valid? */
469 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
470 continue;
471 rcu_read_unlock();
472 update_open_stateid(state, NULL, &stateid, open_mode);
473 goto out_return_state;
474 }
aac00a8d
TM		 475 rcu_read_unlock();
476out:
477 return ERR_PTR(ret);
478out_return_state:
479 atomic_inc(&state->count);
480 return state;
481}
482
24ac23ab
TM		 483static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
484{
485 struct inode *inode;
486 struct nfs4_state *state = NULL;
003707c7
TM		 487 struct nfs_delegation *delegation;
488 nfs4_stateid *deleg_stateid = NULL;
1b370bc2 489 int ret;
24ac23ab 490
aac00a8d 491 if (!data->rpc_done) {
6ee41268 492 state = nfs4_try_open_cached(data);
aac00a8d
TM		 493 goto out;
494 }
495
1b370bc2 496 ret = -EAGAIN;
24ac23ab 497 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 498 goto err;
24ac23ab 499 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 500 ret = PTR_ERR(inode);
03f28e3a 501 if (IS_ERR(inode))
1b370bc2
TM		 502 goto err;
503 ret = -ENOMEM;
24ac23ab
TM		 504 state = nfs4_get_open_state(inode, data->owner);
505 if (state == NULL)
1b370bc2 506 goto err_put_inode;
549d6ed5 507 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 508 int delegation_flags = 0;
509
003707c7
TM		 510 rcu_read_lock();
511 delegation = rcu_dereference(NFS_I(inode)->delegation);
512 if (delegation)
513 delegation_flags = delegation->flags;
514 rcu_read_unlock();
549d6ed5
TM		 515 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
516 nfs_inode_set_delegation(state->inode,
517 data->owner->so_cred,
518 &data->o_res);
519 else
520 nfs_inode_reclaim_delegation(state->inode,
521 data->owner->so_cred,
522 &data->o_res);
523 }
003707c7
TM		 524 rcu_read_lock();
525 delegation = rcu_dereference(NFS_I(inode)->delegation);
526 if (delegation != NULL)
527 deleg_stateid = &delegation->stateid;
528 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
529 rcu_read_unlock();
24ac23ab 530 iput(inode);
aac00a8d 531out:
24ac23ab 532 return state;
1b370bc2
TM		 533err_put_inode:
534 iput(inode);
535err:
536 return ERR_PTR(ret);
24ac23ab
TM		 537}
538
864472e9
TM		 539static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
540{
541 struct nfs_inode *nfsi = NFS_I(state->inode);
542 struct nfs_open_context *ctx;
543
544 spin_lock(&state->inode->i_lock);
545 list_for_each_entry(ctx, &nfsi->open_files, list) {
546 if (ctx->state != state)
547 continue;
548 get_nfs_open_context(ctx);
549 spin_unlock(&state->inode->i_lock);
550 return ctx;
551 }
552 spin_unlock(&state->inode->i_lock);
553 return ERR_PTR(-ENOENT);
554}
555
6f220ed5
TM		 556static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
557{
558 struct nfs4_opendata *opendata;
559
560 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
561 if (opendata == NULL)
562 return ERR_PTR(-ENOMEM);
563 opendata->state = state;
564 atomic_inc(&state->count);
565 return opendata;
566}
567
2ced46c2 568static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
864472e9 569{
2ced46c2 570 struct nfs4_state *newstate;
864472e9
TM		 571 int ret;
572
573 opendata->o_arg.open_flags = openflags;
2ced46c2
TM		 574 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
575 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
576 nfs4_init_opendata_res(opendata);
864472e9
TM		 577 ret = _nfs4_proc_open(opendata);
578 if (ret != 0)
579 return ret;
2ced46c2 580 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 581 if (IS_ERR(newstate))
582 return PTR_ERR(newstate);
583 nfs4_close_state(&opendata->path, newstate, openflags);
2ced46c2 584 *res = newstate;
864472e9
TM		 585 return 0;
586}
587
588static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
589{
864472e9 590 struct nfs4_state *newstate;
864472e9
TM		 591 int ret;
592
593 /* memory barrier prior to reading state->n_* */
2ced46c2 594 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 595 smp_rmb();
596 if (state->n_rdwr != 0) {
2ced46c2 597 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 598 if (ret != 0)
599 return ret;
2ced46c2
TM		 600 if (newstate != state)
601 return -ESTALE;
864472e9
TM		 602 }
603 if (state->n_wronly != 0) {
2ced46c2 604 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 605 if (ret != 0)
606 return ret;
2ced46c2
TM		 607 if (newstate != state)
608 return -ESTALE;
864472e9
TM		 609 }
610 if (state->n_rdonly != 0) {
2ced46c2 611 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 612 if (ret != 0)
613 return ret;
2ced46c2
TM		 614 if (newstate != state)
615 return -ESTALE;
864472e9 616 }
1ac7e2fd
TM		 617 /*
618 * We may have performed cached opens for all three recoveries.
619 * Check if we need to update the current stateid.
620 */
621 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
622 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 623 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 624 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
625 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 626 write_sequnlock(&state->seqlock);
1ac7e2fd 627 }
864472e9
TM		 628 return 0;
629}
630
1da177e4
LT		 631/*
632 * OPEN_RECLAIM:
633 * reclaim state on the server after a reboot.
1da177e4 634 */
539cd03a 635static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 636{
1ac7e2fd 637 struct nfs_delegation *delegation;
864472e9
TM		 638 struct nfs4_opendata *opendata;
639 int delegation_type = 0;
1da177e4
LT		 640 int status;
641
6f220ed5
TM		 642 opendata = nfs4_open_recoverdata_alloc(ctx, state);
643 if (IS_ERR(opendata))
644 return PTR_ERR(opendata);
864472e9
TM		 645 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
646 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 647 rcu_read_lock();
648 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
649 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
65bbf6bd 650 delegation_type = delegation->type;
1ac7e2fd 651 rcu_read_unlock();
864472e9
TM		 652 opendata->o_arg.u.delegation_type = delegation_type;
653 status = nfs4_open_recover(opendata, state);
c6d00e63 654 nfs4_opendata_put(opendata);
1da177e4
LT		 655 return status;
656}
657
539cd03a 658static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 659{
660 struct nfs_server *server = NFS_SERVER(state->inode);
661 struct nfs4_exception exception = { };
662 int err;
663 do {
539cd03a 664 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 665 if (err != -NFS4ERR_DELAY)
666 break;
667 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 668 } while (exception.retry);
669 return err;
670}
671
864472e9
TM		 672static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
673{
674 struct nfs_open_context *ctx;
675 int ret;
676
677 ctx = nfs4_state_find_open_context(state);
678 if (IS_ERR(ctx))
679 return PTR_ERR(ctx);
539cd03a 680 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 681 put_nfs_open_context(ctx);
682 return ret;
683}
684
13437e12 685static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 686{
e56e0b78 687 struct nfs4_opendata *opendata;
864472e9 688 int ret;
1da177e4 689
6f220ed5
TM		 690 opendata = nfs4_open_recoverdata_alloc(ctx, state);
691 if (IS_ERR(opendata))
692 return PTR_ERR(opendata);
e56e0b78 693 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 694 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 695 sizeof(opendata->o_arg.u.delegation.data));
864472e9 696 ret = nfs4_open_recover(opendata, state);
c6d00e63 697 nfs4_opendata_put(opendata);
864472e9 698 return ret;
1da177e4
LT		 699}
700
13437e12 701int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 702{
703 struct nfs4_exception exception = { };
539cd03a 704 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 705 int err;
706 do {
13437e12 707 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 708 switch (err) {
709 case 0:
710 return err;
711 case -NFS4ERR_STALE_CLIENTID:
712 case -NFS4ERR_STALE_STATEID:
713 case -NFS4ERR_EXPIRED:
714 /* Don't recall a delegation if it was lost */
7539bbab 715 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 716 return err;
717 }
718 err = nfs4_handle_exception(server, err, &exception);
719 } while (exception.retry);
720 return err;
721}
722
cdd4e68b 723static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1da177e4 724{
cdd4e68b
TM		 725 struct nfs4_opendata *data = calldata;
726 struct rpc_message msg = {
727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
728 .rpc_argp = &data->c_arg,
729 .rpc_resp = &data->c_res,
730 .rpc_cred = data->owner->so_cred,
1da177e4 731 };
26e976a8 732 data->timestamp = jiffies;
cdd4e68b
TM		 733 rpc_call_setup(task, &msg, 0);
734}
735
736static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
737{
738 struct nfs4_opendata *data = calldata;
739
740 data->rpc_status = task->tk_status;
741 if (RPC_ASSASSINATED(task))
742 return;
26e976a8 743 if (data->rpc_status == 0) {
cdd4e68b
TM		 744 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
745 sizeof(data->o_res.stateid.data));
26e976a8 746 renew_lease(data->o_res.server, data->timestamp);
3e309914 747 data->rpc_done = 1;
26e976a8 748 }
cdd4e68b 749 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
0f9f95e0 750 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
cdd4e68b
TM		 751}
752
753static void nfs4_open_confirm_release(void *calldata)
754{
755 struct nfs4_opendata *data = calldata;
756 struct nfs4_state *state = NULL;
757
758 /* If this request hasn't been cancelled, do nothing */
759 if (data->cancelled == 0)
760 goto out_free;
761 /* In case of error, no cleanup! */
3e309914 762 if (!data->rpc_done)
cdd4e68b
TM		 763 goto out_free;
764 nfs_confirm_seqid(&data->owner->so_seqid, 0);
765 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 766 if (!IS_ERR(state))
4a35bd41 767 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
cdd4e68b 768out_free:
c6d00e63 769 nfs4_opendata_put(data);
cdd4e68b
TM		 770}
771
772static const struct rpc_call_ops nfs4_open_confirm_ops = {
773 .rpc_call_prepare = nfs4_open_confirm_prepare,
774 .rpc_call_done = nfs4_open_confirm_done,
775 .rpc_release = nfs4_open_confirm_release,
776};
777
778/*
779 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
780 */
781static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
782{
783 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
784 struct rpc_task *task;
1da177e4
LT		 785 int status;
786
c6d00e63 787 kref_get(&data->kref);
3e309914
TM		 788 data->rpc_done = 0;
789 data->rpc_status = 0;
cdd4e68b 790 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
7a1218a2 791 if (IS_ERR(task))
cdd4e68b 792 return PTR_ERR(task);
cdd4e68b
TM		 793 status = nfs4_wait_for_completion_rpc_task(task);
794 if (status != 0) {
795 data->cancelled = 1;
796 smp_wmb();
797 } else
798 status = data->rpc_status;
e6b3c4db 799 rpc_put_task(task);
1da177e4
LT		 800 return status;
801}
802
24ac23ab 803static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 804{
24ac23ab
TM		 805 struct nfs4_opendata *data = calldata;
806 struct nfs4_state_owner *sp = data->owner;
1da177e4
LT		 807 struct rpc_message msg = {
808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
24ac23ab
TM		 809 .rpc_argp = &data->o_arg,
810 .rpc_resp = &data->o_res,
1da177e4
LT		 811 .rpc_cred = sp->so_cred,
812 };
24ac23ab
TM		 813
814 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
815 return;
aac00a8d
TM		 816 /*
817 * Check if we still need to send an OPEN call, or if we can use
818 * a delegation instead.
819 */
820 if (data->state != NULL) {
821 struct nfs_delegation *delegation;
822
6ee41268
TM		 823 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
824 goto out_no_action;
aac00a8d
TM		 825 rcu_read_lock();
826 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
827 if (delegation != NULL &&
828 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
829 rcu_read_unlock();
6ee41268 830 goto out_no_action;
aac00a8d
TM		 831 }
832 rcu_read_unlock();
833 }
24ac23ab 834 /* Update sequence id. */
9f958ab8 835 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 836 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 837 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
864472e9 838 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 839 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
840 }
26e976a8 841 data->timestamp = jiffies;
24ac23ab 842 rpc_call_setup(task, &msg, 0);
6ee41268
TM		 843 return;
844out_no_action:
845 task->tk_action = NULL;
846
24ac23ab 847}
1da177e4 848
24ac23ab
TM		 849static void nfs4_open_done(struct rpc_task *task, void *calldata)
850{
851 struct nfs4_opendata *data = calldata;
1da177e4 852
24ac23ab
TM		 853 data->rpc_status = task->tk_status;
854 if (RPC_ASSASSINATED(task))
855 return;
856 if (task->tk_status == 0) {
857 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 858 case S_IFREG:
859 break;
860 case S_IFLNK:
24ac23ab 861 data->rpc_status = -ELOOP;
6f926b5b
TM		 862 break;
863 case S_IFDIR:
24ac23ab 864 data->rpc_status = -EISDIR;
6f926b5b
TM		 865 break;
866 default:
24ac23ab 867 data->rpc_status = -ENOTDIR;
6f926b5b 868 }
26e976a8 869 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 870 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
871 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 872 }
24ac23ab 873 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
3e309914 874 data->rpc_done = 1;
24ac23ab 875}
6f926b5b 876
24ac23ab
TM		 877static void nfs4_open_release(void *calldata)
878{
879 struct nfs4_opendata *data = calldata;
880 struct nfs4_state *state = NULL;
881
882 /* If this request hasn't been cancelled, do nothing */
883 if (data->cancelled == 0)
884 goto out_free;
885 /* In case of error, no cleanup! */
3e309914 886 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 887 goto out_free;
888 /* In case we need an open_confirm, no cleanup! */
889 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
890 goto out_free;
891 nfs_confirm_seqid(&data->owner->so_seqid, 0);
892 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 893 if (!IS_ERR(state))
4a35bd41 894 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
24ac23ab 895out_free:
c6d00e63 896 nfs4_opendata_put(data);
24ac23ab
TM		 897}
898
899static const struct rpc_call_ops nfs4_open_ops = {
900 .rpc_call_prepare = nfs4_open_prepare,
901 .rpc_call_done = nfs4_open_done,
902 .rpc_release = nfs4_open_release,
903};
904
905/*
906 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
907 */
908static int _nfs4_proc_open(struct nfs4_opendata *data)
909{
910 struct inode *dir = data->dir->d_inode;
911 struct nfs_server *server = NFS_SERVER(dir);
912 struct nfs_openargs *o_arg = &data->o_arg;
913 struct nfs_openres *o_res = &data->o_res;
914 struct rpc_task *task;
915 int status;
916
c6d00e63 917 kref_get(&data->kref);
3e309914
TM		 918 data->rpc_done = 0;
919 data->rpc_status = 0;
2ced46c2 920 data->cancelled = 0;
24ac23ab 921 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
7a1218a2 922 if (IS_ERR(task))
24ac23ab 923 return PTR_ERR(task);
24ac23ab
TM		 924 status = nfs4_wait_for_completion_rpc_task(task);
925 if (status != 0) {
926 data->cancelled = 1;
927 smp_wmb();
928 } else
929 status = data->rpc_status;
e6b3c4db 930 rpc_put_task(task);
3e309914 931 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 932 return status;
933
9936781d
TM		 934 if (o_res->fh.size == 0)
935 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
936
56ae19f3
TM		 937 if (o_arg->open_flags & O_CREAT) {
938 update_changeattr(dir, &o_res->cinfo);
939 nfs_post_op_update_inode(dir, o_res->dir_attr);
940 } else
941 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 942 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 943 status = _nfs4_proc_open_confirm(data);
1da177e4 944 if (status != 0)
24ac23ab 945 return status;
1da177e4
LT		 946 }
947 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 948 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 949 return 0;
1da177e4
LT		 950}
951
10afec90 952static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 953{
7539bbab 954 struct nfs_client *clp = server->nfs_client;
6b30954e 955 int ret;
58d9714a 956
6b30954e
TM		 957 for (;;) {
958 ret = nfs4_wait_clnt_recover(server->client, clp);
959 if (ret != 0)
960 return ret;
961 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
962 break;
58d9714a 963 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 964 }
965 return 0;
58d9714a
TM		 966}
967
1da177e4
LT		 968/*
969 * OPEN_EXPIRED:
970 * reclaim state on the server after a network partition.
971 * Assumes caller holds the appropriate lock
972 */
539cd03a 973static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 974{
e56e0b78 975 struct nfs4_opendata *opendata;
864472e9 976 int ret;
1da177e4 977
6f220ed5
TM		 978 opendata = nfs4_open_recoverdata_alloc(ctx, state);
979 if (IS_ERR(opendata))
980 return PTR_ERR(opendata);
864472e9
TM		 981 ret = nfs4_open_recover(opendata, state);
982 if (ret == -ESTALE) {
983 /* Invalidate the state owner so we don't ever use it again */
539cd03a
TM		 984 nfs4_drop_state_owner(state->owner);
985 d_drop(ctx->path.dentry);
1da177e4 986 }
c6d00e63 987 nfs4_opendata_put(opendata);
864472e9 988 return ret;
1da177e4
LT		 989}
990
539cd03a 991static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 992{
539cd03a 993 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 994 struct nfs4_exception exception = { };
995 int err;
996
997 do {
539cd03a 998 err = _nfs4_open_expired(ctx, state);
202b50dc
TM		 999 if (err == -NFS4ERR_DELAY)
1000 nfs4_handle_exception(server, err, &exception);
1001 } while (exception.retry);
1002 return err;
1003}
1004
1da177e4
LT		 1005static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1006{
1da177e4 1007 struct nfs_open_context *ctx;
864472e9 1008 int ret;
1da177e4 1009
864472e9
TM		 1010 ctx = nfs4_state_find_open_context(state);
1011 if (IS_ERR(ctx))
1012 return PTR_ERR(ctx);
539cd03a 1013 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1014 put_nfs_open_context(ctx);
1015 return ret;
1da177e4
LT		 1016}
1017
aa53ed54
JL		 1018/*
1019 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1020 * fields corresponding to attributes that were used to store the verifier.
1021 * Make sure we clobber those fields in the later setattr call
1022 */
1023static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1024{
1025 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1026 !(sattr->ia_valid & ATTR_ATIME_SET))
1027 sattr->ia_valid |= ATTR_ATIME;
1028
1029 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1030 !(sattr->ia_valid & ATTR_MTIME_SET))
1031 sattr->ia_valid |= ATTR_MTIME;
1032}
1033
1da177e4 1034/*
24ac23ab 1035 * Returns a referenced nfs4_state
1da177e4 1036 */
ad389da7 1037static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1038{
1039 struct nfs4_state_owner *sp;
1040 struct nfs4_state *state = NULL;
1041 struct nfs_server *server = NFS_SERVER(dir);
7539bbab 1042 struct nfs_client *clp = server->nfs_client;
e56e0b78 1043 struct nfs4_opendata *opendata;
aac00a8d 1044 int status;
1da177e4
LT		 1045
1046 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1047 status = -ENOMEM;
1048 if (!(sp = nfs4_get_state_owner(server, cred))) {
1049 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1050 goto out_err;
1051 }
58d9714a
TM		 1052 status = nfs4_recover_expired_lease(server);
1053 if (status != 0)
b4454fe1 1054 goto err_put_state_owner;
aac00a8d
TM		 1055 if (path->dentry->d_inode != NULL)
1056 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
58d9714a
TM		 1057 down_read(&clp->cl_sem);
1058 status = -ENOMEM;
ad389da7 1059 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
e56e0b78 1060 if (opendata == NULL)
76723de0 1061 goto err_release_rwsem;
1da177e4 1062
aac00a8d
TM		 1063 if (path->dentry->d_inode != NULL)
1064 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1065
24ac23ab 1066 status = _nfs4_proc_open(opendata);
1da177e4 1067 if (status != 0)
c6d00e63 1068 goto err_opendata_put;
1da177e4 1069
aa53ed54
JL		 1070 if (opendata->o_arg.open_flags & O_EXCL)
1071 nfs4_exclusive_attrset(opendata, sattr);
1072
24ac23ab 1073 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1074 status = PTR_ERR(state);
1075 if (IS_ERR(state))
c6d00e63 1076 goto err_opendata_put;
c6d00e63 1077 nfs4_opendata_put(opendata);
1da177e4
LT		 1078 nfs4_put_state_owner(sp);
1079 up_read(&clp->cl_sem);
1080 *res = state;
1081 return 0;
c6d00e63
TM		 1082err_opendata_put:
1083 nfs4_opendata_put(opendata);
76723de0
TM		 1084err_release_rwsem:
1085 up_read(&clp->cl_sem);
e56e0b78
TM		 1086err_put_state_owner:
1087 nfs4_put_state_owner(sp);
1da177e4 1088out_err:
1da177e4
LT		 1089 *res = NULL;
1090 return status;
1091}
1092
1093
ad389da7 1094static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1095{
1096 struct nfs4_exception exception = { };
1097 struct nfs4_state *res;
1098 int status;
1099
1100 do {
ad389da7 1101 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1da177e4
LT		 1102 if (status == 0)
1103 break;
1104 /* NOTE: BAD_SEQID means the server and client disagree about the
1105 * book-keeping w.r.t. state-changing operations
1106 * (OPEN/CLOSE/LOCK/LOCKU...)
1107 * It is actually a sign of a bug on the client or on the server.
1108 *
1109 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1110 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1111 * have unhashed the old state_owner for us, and that we can
1112 * therefore safely retry using a new one. We should still warn
1113 * the user though...
1114 */
1115 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1116 printk(KERN_WARNING "NFS: v4 server %s "
1117 " returned a bad sequence-id error!\n",
1118 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1119 exception.retry = 1;
1120 continue;
1121 }
550f5747
TM		 1122 /*
1123 * BAD_STATEID on OPEN means that the server cancelled our
1124 * state before it received the OPEN_CONFIRM.
1125 * Recover by retrying the request as per the discussion
1126 * on Page 181 of RFC3530.
1127 */
1128 if (status == -NFS4ERR_BAD_STATEID) {
1129 exception.retry = 1;
1130 continue;
1131 }
aac00a8d
TM		 1132 if (status == -EAGAIN) {
1133 /* We must have found a delegation */
1134 exception.retry = 1;
1135 continue;
1136 }
1da177e4
LT		 1137 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1138 status, &exception));
1139 } while (exception.retry);
1140 return res;
1141}
1142
3e4f6290
TM		 1143static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1144 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1145{
3e4f6290 1146 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1147 struct nfs_setattrargs arg = {
3e4f6290 1148 .fh = NFS_FH(inode),
1da177e4
LT		 1149 .iap = sattr,
1150 .server = server,
1151 .bitmask = server->attr_bitmask,
1152 };
1153 struct nfs_setattrres res = {
1154 .fattr = fattr,
1155 .server = server,
1156 };
1157 struct rpc_message msg = {
1158 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1159 .rpc_argp = &arg,
1160 .rpc_resp = &res,
1161 };
26e976a8 1162 unsigned long timestamp = jiffies;
65e4308d 1163 int status;
1da177e4 1164
0e574af1 1165 nfs_fattr_init(fattr);
1da177e4 1166
3e4f6290
TM		 1167 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1168 /* Use that stateid */
1169 } else if (state != NULL) {
1da177e4 1170 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 1171 nfs4_copy_stateid(&arg.stateid, state, current->files);
1172 } else
1da177e4
LT		 1173 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1174
65e4308d 1175 status = rpc_call_sync(server->client, &msg, 0);
26e976a8
TM		 1176 if (status == 0 && state != NULL)
1177 renew_lease(server, timestamp);
65e4308d 1178 return status;
1da177e4
LT		 1179}
1180
3e4f6290
TM		 1181static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1182 struct iattr *sattr, struct nfs4_state *state)
1da177e4 1183{
3e4f6290 1184 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1185 struct nfs4_exception exception = { };
1186 int err;
1187 do {
1188 err = nfs4_handle_exception(server,
3e4f6290 1189 _nfs4_do_setattr(inode, fattr, sattr, state),
1da177e4
LT		 1190 &exception);
1191 } while (exception.retry);
1192 return err;
1193}
1194
1195struct nfs4_closedata {
4a35bd41 1196 struct path path;
1da177e4
LT		 1197 struct inode *inode;
1198 struct nfs4_state *state;
1199 struct nfs_closeargs arg;
1200 struct nfs_closeres res;
516a6af6 1201 struct nfs_fattr fattr;
26e976a8 1202 unsigned long timestamp;
1da177e4
LT		 1203};
1204
963d8fe5 1205static void nfs4_free_closedata(void *data)
9512135d 1206{
963d8fe5
TM		 1207 struct nfs4_closedata *calldata = data;
1208 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1209
1210 nfs4_put_open_state(calldata->state);
1211 nfs_free_seqid(calldata->arg.seqid);
9512135d 1212 nfs4_put_state_owner(sp);
4a35bd41
TM		 1213 dput(calldata->path.dentry);
1214 mntput(calldata->path.mnt);
9512135d
TM		 1215 kfree(calldata);
1216}
1217
963d8fe5 1218static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1219{
963d8fe5 1220 struct nfs4_closedata *calldata = data;
1da177e4 1221 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1222 struct nfs_server *server = NFS_SERVER(calldata->inode);
1223
4ce70ada
TM		 1224 if (RPC_ASSASSINATED(task))
1225 return;
1da177e4
LT		 1226 /* hmm. we are done with the inode, and in the process of freeing
1227 * the state_owner. we keep this around to process errors
1228 */
cee54fc9 1229 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 1230 switch (task->tk_status) {
1231 case 0:
45328c35 1232 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1233 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1234 break;
1235 case -NFS4ERR_STALE_STATEID:
1236 case -NFS4ERR_EXPIRED:
1da177e4
LT		 1237 break;
1238 default:
1239 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1240 rpc_restart_call(task);
1241 return;
1242 }
1243 }
516a6af6 1244 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1245}
1246
4ce70ada 1247static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1248{
4ce70ada 1249 struct nfs4_closedata *calldata = data;
9512135d 1250 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1251 struct rpc_message msg = {
1252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1253 .rpc_argp = &calldata->arg,
1254 .rpc_resp = &calldata->res,
9512135d 1255 .rpc_cred = state->owner->so_cred,
1da177e4 1256 };
003707c7 1257 int clear_rd, clear_wr, clear_rdwr;
9512135d 1258
963d8fe5 1259 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1260 return;
003707c7 1261
003707c7 1262 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1263 spin_lock(&state->owner->so_lock);
003707c7 1264 /* Calculate the change in open mode */
e7616923 1265 if (state->n_rdwr == 0) {
003707c7 1266 if (state->n_rdonly == 0) {
003707c7
TM		 1267 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1268 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1269 }
1270 if (state->n_wronly == 0) {
003707c7
TM		 1271 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1272 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1273 }
e7616923 1274 }
4cecb76f 1275 spin_unlock(&state->owner->so_lock);
003707c7 1276 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1277 /* Note: exit _without_ calling nfs4_close_done */
1278 task->tk_action = NULL;
9512135d
TM		 1279 return;
1280 }
516a6af6 1281 nfs_fattr_init(calldata->res.fattr);
45328c35 1282 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1da177e4 1283 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1284 calldata->arg.open_flags = FMODE_READ;
1285 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1286 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1287 calldata->arg.open_flags = FMODE_WRITE;
1288 }
26e976a8 1289 calldata->timestamp = jiffies;
9512135d 1290 rpc_call_setup(task, &msg, 0);
1da177e4
LT		 1291}
1292
963d8fe5 1293static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1294 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1295 .rpc_call_done = nfs4_close_done,
1296 .rpc_release = nfs4_free_closedata,
1297};
1298
1da177e4
LT		 1299/*
1300 * It is possible for data to be read/written from a mem-mapped file
1301 * after the sys_close call (which hits the vfs layer as a flush).
1302 * This means that we can't safely call nfsv4 close on a file until
1303 * the inode is cleared. This in turn means that we are not good
1304 * NFSv4 citizens - we do not indicate to the server to update the file's
1305 * share state even when we are done with one of the three share
1306 * stateid's in the inode.
1307 *
1308 * NOTE: Caller must be holding the sp->so_owner semaphore!
1309 */
4a35bd41 1310int nfs4_do_close(struct path *path, struct nfs4_state *state)
1da177e4 1311{
4a35bd41 1312 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1313 struct nfs4_closedata *calldata;
b39e625b
TM		 1314 struct nfs4_state_owner *sp = state->owner;
1315 struct rpc_task *task;
9512135d 1316 int status = -ENOMEM;
1da177e4 1317
9512135d 1318 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1319 if (calldata == NULL)
9512135d 1320 goto out;
4a35bd41 1321 calldata->inode = state->inode;
1da177e4 1322 calldata->state = state;
4a35bd41 1323 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1324 calldata->arg.stateid = &state->open_stateid;
1da177e4 1325 /* Serialization for the sequence id */
cee54fc9 1326 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1327 if (calldata->arg.seqid == NULL)
1328 goto out_free_calldata;
516a6af6
TM		 1329 calldata->arg.bitmask = server->attr_bitmask;
1330 calldata->res.fattr = &calldata->fattr;
1331 calldata->res.server = server;
4a35bd41
TM		 1332 calldata->path.mnt = mntget(path->mnt);
1333 calldata->path.dentry = dget(path->dentry);
9512135d 1334
b39e625b
TM		 1335 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
1336 if (IS_ERR(task))
1337 return PTR_ERR(task);
1338 rpc_put_task(task);
1339 return 0;
9512135d
TM		 1340out_free_calldata:
1341 kfree(calldata);
1342out:
b39e625b
TM		 1343 nfs4_put_open_state(state);
1344 nfs4_put_state_owner(sp);
9512135d 1345 return status;
1da177e4
LT		 1346}
1347
4a35bd41 1348static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM		 1349{
1350 struct file *filp;
1b45c46c 1351 int ret;
02a913a7 1352
1b45c46c
TM		 1353 /* If the open_intent is for execute, we have an extra check to make */
1354 if (nd->intent.open.flags & FMODE_EXEC) {
af22f94a 1355 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1356 state->owner->so_cred,
1357 nd->intent.open.flags);
1358 if (ret < 0)
1359 goto out_close;
1360 }
4a35bd41 1361 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1362 if (!IS_ERR(filp)) {
1363 struct nfs_open_context *ctx;
cd3758e3 1364 ctx = nfs_file_open_context(filp);
02a913a7 1365 ctx->state = state;
95cf959b
TM		 1366 return 0;
1367 }
1b45c46c
TM		 1368 ret = PTR_ERR(filp);
1369out_close:
4a35bd41 1370 nfs4_close_state(path, state, nd->intent.open.flags);
1b45c46c 1371 return ret;
02a913a7
TM		 1372}
1373
1374struct dentry *
1da177e4
LT		 1375nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1376{
ad389da7
TM		 1377 struct path path = {
1378 .mnt = nd->mnt,
1379 .dentry = dentry,
1380 };
1da177e4
LT		 1381 struct iattr attr;
1382 struct rpc_cred *cred;
1383 struct nfs4_state *state;
02a913a7 1384 struct dentry *res;
1da177e4
LT		 1385
1386 if (nd->flags & LOOKUP_CREATE) {
1387 attr.ia_mode = nd->intent.open.create_mode;
1388 attr.ia_valid = ATTR_MODE;
1389 if (!IS_POSIXACL(dir))
1390 attr.ia_mode &= ~current->fs->umask;
1391 } else {
1392 attr.ia_valid = 0;
1393 BUG_ON(nd->intent.open.flags & O_CREAT);
1394 }
1395
1f163415 1396 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4 1397 if (IS_ERR(cred))
02a913a7 1398 return (struct dentry *)cred;
ad389da7 1399 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1400 put_rpccred(cred);
02a913a7 1401 if (IS_ERR(state)) {
d75340cc 1402 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1403 d_add(dentry, NULL);
d75340cc
TM		 1404 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1405 }
02a913a7
TM		 1406 return (struct dentry *)state;
1407 }
24ac23ab 1408 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1409 if (res != NULL)
deee9369 1410 path.dentry = res;
d75340cc 1411 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
4a35bd41 1412 nfs4_intent_set_file(nd, &path, state);
02a913a7 1413 return res;
1da177e4
LT		 1414}
1415
1416int
02a913a7 1417nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1418{
ad389da7
TM		 1419 struct path path = {
1420 .mnt = nd->mnt,
1421 .dentry = dentry,
1422 };
1da177e4
LT		 1423 struct rpc_cred *cred;
1424 struct nfs4_state *state;
1da177e4 1425
1f163415 1426 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1427 if (IS_ERR(cred))
1428 return PTR_ERR(cred);
aac00a8d 1429 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1430 put_rpccred(cred);
02a913a7
TM		 1431 if (IS_ERR(state)) {
1432 switch (PTR_ERR(state)) {
1433 case -EPERM:
1434 case -EACCES:
1435 case -EDQUOT:
1436 case -ENOSPC:
1437 case -EROFS:
1438 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1439 return 1;
b87c0adf
CL		 1440 default:
1441 goto out_drop;
02a913a7 1442 }
02a913a7 1443 }
24ac23ab 1444 if (state->inode == dentry->d_inode) {
d75340cc 1445 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
4a35bd41 1446 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1447 return 1;
1448 }
4a35bd41 1449 nfs4_close_state(&path, state, openflags);
02a913a7
TM		 1450out_drop:
1451 d_drop(dentry);
1da177e4
LT		 1452 return 0;
1453}
1454
1455
1456static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1457{
1458 struct nfs4_server_caps_res res = {};
1459 struct rpc_message msg = {
1460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1461 .rpc_argp = fhandle,
1462 .rpc_resp = &res,
1463 };
1464 int status;
1465
1466 status = rpc_call_sync(server->client, &msg, 0);
1467 if (status == 0) {
1468 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1469 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1470 server->caps |= NFS_CAP_ACLS;
1471 if (res.has_links != 0)
1472 server->caps |= NFS_CAP_HARDLINKS;
1473 if (res.has_symlinks != 0)
1474 server->caps |= NFS_CAP_SYMLINKS;
1475 server->acl_bitmask = res.acl_bitmask;
1476 }
1477 return status;
1478}
1479
55a97593 1480int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1481{
1482 struct nfs4_exception exception = { };
1483 int err;
1484 do {
1485 err = nfs4_handle_exception(server,
1486 _nfs4_server_capabilities(server, fhandle),
1487 &exception);
1488 } while (exception.retry);
1489 return err;
1490}
1491
1492static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1493 struct nfs_fsinfo *info)
1494{
1da177e4
LT		 1495 struct nfs4_lookup_root_arg args = {
1496 .bitmask = nfs4_fattr_bitmap,
1497 };
1498 struct nfs4_lookup_res res = {
1499 .server = server,
0e574af1 1500 .fattr = info->fattr,
1da177e4
LT		 1501 .fh = fhandle,
1502 };
1503 struct rpc_message msg = {
1504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1505 .rpc_argp = &args,
1506 .rpc_resp = &res,
1507 };
0e574af1 1508 nfs_fattr_init(info->fattr);
1da177e4
LT		 1509 return rpc_call_sync(server->client, &msg, 0);
1510}
1511
1512static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1513 struct nfs_fsinfo *info)
1514{
1515 struct nfs4_exception exception = { };
1516 int err;
1517 do {
1518 err = nfs4_handle_exception(server,
1519 _nfs4_lookup_root(server, fhandle, info),
1520 &exception);
1521 } while (exception.retry);
1522 return err;
1523}
1524
54ceac45
DH		 1525/*
1526 * get the file handle for the "/" directory on the server
1527 */
1da177e4 1528static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1529 struct nfs_fsinfo *info)
1da177e4 1530{
1da177e4
LT		 1531 int status;
1532
1da177e4 1533 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1534 if (status == 0)
1535 status = nfs4_server_capabilities(server, fhandle);
1536 if (status == 0)
1537 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1538 return nfs4_map_errors(status);
1da177e4
LT		 1539}
1540
6b97fd3d
MN		 1541/*
1542 * Get locations and (maybe) other attributes of a referral.
1543 * Note that we'll actually follow the referral later when
1544 * we detect fsid mismatch in inode revalidation
1545 */
56659e99 1546static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1547{
1548 int status = -ENOMEM;
1549 struct page *page = NULL;
1550 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1551
1552 page = alloc_page(GFP_KERNEL);
1553 if (page == NULL)
1554 goto out;
1555 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1556 if (locations == NULL)
1557 goto out;
1558
c228fd3a 1559 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1560 if (status != 0)
1561 goto out;
1562 /* Make sure server returned a different fsid for the referral */
1563 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1564 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1565 status = -EIO;
1566 goto out;
1567 }
1568
1569 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1570 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1571 if (!fattr->mode)
1572 fattr->mode = S_IFDIR;
1573 memset(fhandle, 0, sizeof(struct nfs_fh));
1574out:
1575 if (page)
1576 __free_page(page);
1577 if (locations)
1578 kfree(locations);
1579 return status;
1580}
1581
1da177e4
LT		 1582static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1583{
1584 struct nfs4_getattr_arg args = {
1585 .fh = fhandle,
1586 .bitmask = server->attr_bitmask,
1587 };
1588 struct nfs4_getattr_res res = {
1589 .fattr = fattr,
1590 .server = server,
1591 };
1592 struct rpc_message msg = {
1593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1594 .rpc_argp = &args,
1595 .rpc_resp = &res,
1596 };
1597
0e574af1 1598 nfs_fattr_init(fattr);
1da177e4
LT		 1599 return rpc_call_sync(server->client, &msg, 0);
1600}
1601
1602static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1603{
1604 struct nfs4_exception exception = { };
1605 int err;
1606 do {
1607 err = nfs4_handle_exception(server,
1608 _nfs4_proc_getattr(server, fhandle, fattr),
1609 &exception);
1610 } while (exception.retry);
1611 return err;
1612}
1613
1614/*
1615 * The file is not closed if it is opened due to the a request to change
1616 * the size of the file. The open call will not be needed once the
1617 * VFS layer lookup-intents are implemented.
1618 *
1619 * Close is called when the inode is destroyed.
1620 * If we haven't opened the file for O_WRONLY, we
1621 * need to in the size_change case to obtain a stateid.
1622 *
1623 * Got race?
1624 * Because OPEN is always done by name in nfsv4, it is
1625 * possible that we opened a different file by the same
1626 * name. We can recognize this race condition, but we
1627 * can't do anything about it besides returning an error.
1628 *
1629 * This will be fixed with VFS changes (lookup-intent).
1630 */
1631static int
1632nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1633 struct iattr *sattr)
1634{
08e9eac4
TM		 1635 struct rpc_cred *cred;
1636 struct inode *inode = dentry->d_inode;
d530838b
TM		 1637 struct nfs_open_context *ctx;
1638 struct nfs4_state *state = NULL;
1da177e4
LT		 1639 int status;
1640
0e574af1 1641 nfs_fattr_init(fattr);
1da177e4 1642
1f163415 1643 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
08e9eac4
TM		 1644 if (IS_ERR(cred))
1645 return PTR_ERR(cred);
d530838b
TM		 1646
1647 /* Search for an existing open(O_WRITE) file */
1648 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1649 if (ctx != NULL)
1650 state = ctx->state;
08e9eac4 1651
3e4f6290 1652 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1653 if (status == 0)
1654 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1655 if (ctx != NULL)
1656 put_nfs_open_context(ctx);
08e9eac4 1657 put_rpccred(cred);
1da177e4
LT		 1658 return status;
1659}
1660
56659e99
TM		 1661static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1662 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1663 struct nfs_fattr *fattr)
1664{
1665 int status;
1666 struct nfs4_lookup_arg args = {
1667 .bitmask = server->attr_bitmask,
1668 .dir_fh = dirfh,
1669 .name = name,
1670 };
1671 struct nfs4_lookup_res res = {
1672 .server = server,
1673 .fattr = fattr,
1674 .fh = fhandle,
1675 };
1676 struct rpc_message msg = {
1677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1678 .rpc_argp = &args,
1679 .rpc_resp = &res,
1680 };
1681
1682 nfs_fattr_init(fattr);
1683
1684 dprintk("NFS call lookupfh %s\n", name->name);
1685 status = rpc_call_sync(server->client, &msg, 0);
1686 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1687 return status;
1688}
1689
1690static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1691 struct qstr *name, struct nfs_fh *fhandle,
1692 struct nfs_fattr *fattr)
1693{
1694 struct nfs4_exception exception = { };
1695 int err;
1696 do {
4e56e082
TM		 1697 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1698 /* FIXME: !!!! */
1699 if (err == -NFS4ERR_MOVED) {
1700 err = -EREMOTE;
1701 break;
1702 }
1703 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1704 } while (exception.retry);
1705 return err;
1706}
1707
56659e99 1708static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1709 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1710{
4e56e082 1711 int status;
1da177e4
LT		 1712
1713 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1714 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1715 if (status == -NFS4ERR_MOVED)
1716 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1717 dprintk("NFS reply lookup: %d\n", status);
1718 return status;
1719}
1720
1721static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1722{
1723 struct nfs4_exception exception = { };
1724 int err;
1725 do {
1726 err = nfs4_handle_exception(NFS_SERVER(dir),
1727 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1728 &exception);
1729 } while (exception.retry);
1730 return err;
1731}
1732
1733static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1734{
76b32999
TM		 1735 struct nfs_server *server = NFS_SERVER(inode);
1736 struct nfs_fattr fattr;
1da177e4
LT		 1737 struct nfs4_accessargs args = {
1738 .fh = NFS_FH(inode),
76b32999
TM		 1739 .bitmask = server->attr_bitmask,
1740 };
1741 struct nfs4_accessres res = {
1742 .server = server,
1743 .fattr = &fattr,
1da177e4 1744 };
1da177e4
LT		 1745 struct rpc_message msg = {
1746 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1747 .rpc_argp = &args,
1748 .rpc_resp = &res,
1749 .rpc_cred = entry->cred,
1750 };
1751 int mode = entry->mask;
1752 int status;
1753
1754 /*
1755 * Determine which access bits we want to ask for...
1756 */
1757 if (mode & MAY_READ)
1758 args.access |= NFS4_ACCESS_READ;
1759 if (S_ISDIR(inode->i_mode)) {
1760 if (mode & MAY_WRITE)
1761 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1762 if (mode & MAY_EXEC)
1763 args.access |= NFS4_ACCESS_LOOKUP;
1764 } else {
1765 if (mode & MAY_WRITE)
1766 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1767 if (mode & MAY_EXEC)
1768 args.access |= NFS4_ACCESS_EXECUTE;
1769 }
76b32999 1770 nfs_fattr_init(&fattr);
1da177e4
LT		 1771 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1772 if (!status) {
1773 entry->mask = 0;
1774 if (res.access & NFS4_ACCESS_READ)
1775 entry->mask |= MAY_READ;
1776 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1777 entry->mask |= MAY_WRITE;
1778 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1779 entry->mask |= MAY_EXEC;
76b32999 1780 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1781 }
1782 return status;
1783}
1784
1785static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1786{
1787 struct nfs4_exception exception = { };
1788 int err;
1789 do {
1790 err = nfs4_handle_exception(NFS_SERVER(inode),
1791 _nfs4_proc_access(inode, entry),
1792 &exception);
1793 } while (exception.retry);
1794 return err;
1795}
1796
1797/*
1798 * TODO: For the time being, we don't try to get any attributes
1799 * along with any of the zero-copy operations READ, READDIR,
1800 * READLINK, WRITE.
1801 *
1802 * In the case of the first three, we want to put the GETATTR
1803 * after the read-type operation -- this is because it is hard
1804 * to predict the length of a GETATTR response in v4, and thus
1805 * align the READ data correctly. This means that the GETATTR
1806 * may end up partially falling into the page cache, and we should
1807 * shift it into the 'tail' of the xdr_buf before processing.
1808 * To do this efficiently, we need to know the total length
1809 * of data received, which doesn't seem to be available outside
1810 * of the RPC layer.
1811 *
1812 * In the case of WRITE, we also want to put the GETATTR after
1813 * the operation -- in this case because we want to make sure
1814 * we get the post-operation mtime and size. This means that
1815 * we can't use xdr_encode_pages() as written: we need a variant
1816 * of it which would leave room in the 'tail' iovec.
1817 *
1818 * Both of these changes to the XDR layer would in fact be quite
1819 * minor, but I decided to leave them for a subsequent patch.
1820 */
1821static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1822 unsigned int pgbase, unsigned int pglen)
1823{
1824 struct nfs4_readlink args = {
1825 .fh = NFS_FH(inode),
1826 .pgbase = pgbase,
1827 .pglen = pglen,
1828 .pages = &page,
1829 };
1830 struct rpc_message msg = {
1831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1832 .rpc_argp = &args,
1833 .rpc_resp = NULL,
1834 };
1835
1836 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1837}
1838
1839static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1840 unsigned int pgbase, unsigned int pglen)
1841{
1842 struct nfs4_exception exception = { };
1843 int err;
1844 do {
1845 err = nfs4_handle_exception(NFS_SERVER(inode),
1846 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1847 &exception);
1848 } while (exception.retry);
1849 return err;
1850}
1851
1da177e4
LT		 1852/*
1853 * Got race?
1854 * We will need to arrange for the VFS layer to provide an atomic open.
1855 * Until then, this create/open method is prone to inefficiency and race
1856 * conditions due to the lookup, create, and open VFS calls from sys_open()
1857 * placed on the wire.
1858 *
1859 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1860 * The file will be opened again in the subsequent VFS open call
1861 * (nfs4_proc_file_open).
1862 *
1863 * The open for read will just hang around to be used by any process that
1864 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1865 */
1866
1867static int
1868nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1869 int flags, struct nameidata *nd)
1da177e4 1870{
ad389da7
TM		 1871 struct path path = {
1872 .mnt = nd->mnt,
1873 .dentry = dentry,
1874 };
1da177e4
LT		 1875 struct nfs4_state *state;
1876 struct rpc_cred *cred;
1877 int status = 0;
1878
1f163415 1879 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1880 if (IS_ERR(cred)) {
1881 status = PTR_ERR(cred);
1882 goto out;
1883 }
ad389da7 1884 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1da177e4 1885 put_rpccred(cred);
d4d9cdcb 1886 d_drop(dentry);
1da177e4
LT		 1887 if (IS_ERR(state)) {
1888 status = PTR_ERR(state);
1889 goto out;
1890 }
d4d9cdcb 1891 d_add(dentry, igrab(state->inode));
d75340cc 1892 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
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);
4fdc17b2 1911 struct nfs_removeargs args = {
1da177e4 1912 .fh = NFS_FH(dir),
4fdc17b2
TM		 1913 .name.len = name->len,
1914 .name.name = name->name,
16e42959
TM		 1915 .bitmask = server->attr_bitmask,
1916 };
4fdc17b2 1917 struct nfs_removeres res = {
16e42959 1918 .server = server,
1da177e4 1919 };
1da177e4 1920 struct rpc_message msg = {
4fdc17b2
TM		 1921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1922 .rpc_argp = &args,
1923 .rpc_resp = &res,
1da177e4
LT		 1924 };
1925 int status;
1926
4fdc17b2 1927 nfs_fattr_init(&res.dir_attr);
16e42959
TM		 1928 status = rpc_call_sync(server->client, &msg, 0);
1929 if (status == 0) {
1930 update_changeattr(dir, &res.cinfo);
4fdc17b2 1931 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 1932 }
1da177e4
LT		 1933 return status;
1934}
1935
1936static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1937{
1938 struct nfs4_exception exception = { };
1939 int err;
1940 do {
1941 err = nfs4_handle_exception(NFS_SERVER(dir),
1942 _nfs4_proc_remove(dir, name),
1943 &exception);
1944 } while (exception.retry);
1945 return err;
1946}
1947
e4eff1a6 1948static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 1949{
e4eff1a6
TM		 1950 struct nfs_server *server = NFS_SERVER(dir);
1951 struct nfs_removeargs *args = msg->rpc_argp;
1952 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 1953
e4eff1a6
TM		 1954 args->bitmask = server->attr_bitmask;
1955 res->server = server;
1da177e4 1956 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 1957}
1958
e4eff1a6 1959static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 1960{
e4eff1a6
TM		 1961 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1962
1963 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1964 return 0;
1965 update_changeattr(dir, &res->cinfo);
1966 nfs_post_op_update_inode(dir, &res->dir_attr);
1967 return 1;
1da177e4
LT		 1968}
1969
1970static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1971 struct inode *new_dir, struct qstr *new_name)
1972{
6caf2c82 1973 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1974 struct nfs4_rename_arg arg = {
1975 .old_dir = NFS_FH(old_dir),
1976 .new_dir = NFS_FH(new_dir),
1977 .old_name = old_name,
1978 .new_name = new_name,
6caf2c82
TM		 1979 .bitmask = server->attr_bitmask,
1980 };
1981 struct nfs_fattr old_fattr, new_fattr;
1982 struct nfs4_rename_res res = {
1983 .server = server,
1984 .old_fattr = &old_fattr,
1985 .new_fattr = &new_fattr,
1da177e4 1986 };
1da177e4
LT		 1987 struct rpc_message msg = {
1988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1989 .rpc_argp = &arg,
1990 .rpc_resp = &res,
1991 };
1992 int status;
1993
6caf2c82
TM		 1994 nfs_fattr_init(res.old_fattr);
1995 nfs_fattr_init(res.new_fattr);
1996 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 1997
1998 if (!status) {
1999 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2000 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2001 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2002 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2003 }
2004 return status;
2005}
2006
2007static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2008 struct inode *new_dir, struct qstr *new_name)
2009{
2010 struct nfs4_exception exception = { };
2011 int err;
2012 do {
2013 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2014 _nfs4_proc_rename(old_dir, old_name,
2015 new_dir, new_name),
2016 &exception);
2017 } while (exception.retry);
2018 return err;
2019}
2020
2021static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2022{
91ba2eee 2023 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2024 struct nfs4_link_arg arg = {
2025 .fh = NFS_FH(inode),
2026 .dir_fh = NFS_FH(dir),
2027 .name = name,
91ba2eee
TM		 2028 .bitmask = server->attr_bitmask,
2029 };
2030 struct nfs_fattr fattr, dir_attr;
2031 struct nfs4_link_res res = {
2032 .server = server,
2033 .fattr = &fattr,
2034 .dir_attr = &dir_attr,
1da177e4 2035 };
1da177e4
LT		 2036 struct rpc_message msg = {
2037 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2038 .rpc_argp = &arg,
91ba2eee 2039 .rpc_resp = &res,
1da177e4
LT		 2040 };
2041 int status;
2042
91ba2eee
TM		 2043 nfs_fattr_init(res.fattr);
2044 nfs_fattr_init(res.dir_attr);
2045 status = rpc_call_sync(server->client, &msg, 0);
2046 if (!status) {
2047 update_changeattr(dir, &res.cinfo);
2048 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2049 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2050 }
1da177e4
LT		 2051
2052 return status;
2053}
2054
2055static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2056{
2057 struct nfs4_exception exception = { };
2058 int err;
2059 do {
2060 err = nfs4_handle_exception(NFS_SERVER(inode),
2061 _nfs4_proc_link(inode, dir, name),
2062 &exception);
2063 } while (exception.retry);
2064 return err;
2065}
2066
4f390c15 2067static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2068 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2069{
2070 struct nfs_server *server = NFS_SERVER(dir);
4f390c15
CL		 2071 struct nfs_fh fhandle;
2072 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2073 struct nfs4_create_arg arg = {
2074 .dir_fh = NFS_FH(dir),
2075 .server = server,
4f390c15 2076 .name = &dentry->d_name,
1da177e4
LT		 2077 .attrs = sattr,
2078 .ftype = NF4LNK,
2079 .bitmask = server->attr_bitmask,
2080 };
2081 struct nfs4_create_res res = {
2082 .server = server,
4f390c15
CL		 2083 .fh = &fhandle,
2084 .fattr = &fattr,
56ae19f3 2085 .dir_fattr = &dir_fattr,
1da177e4
LT		 2086 };
2087 struct rpc_message msg = {
2088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2089 .rpc_argp = &arg,
2090 .rpc_resp = &res,
2091 };
2092 int status;
2093
94a6d753 2094 if (len > NFS4_MAXPATHLEN)
1da177e4 2095 return -ENAMETOOLONG;
4f390c15 2096
94a6d753
CL		 2097 arg.u.symlink.pages = &page;
2098 arg.u.symlink.len = len;
4f390c15 2099 nfs_fattr_init(&fattr);
56ae19f3 2100 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2101
2102 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
4f390c15 2103 if (!status) {
1da177e4 2104 update_changeattr(dir, &res.dir_cinfo);
4f390c15
CL		 2105 nfs_post_op_update_inode(dir, res.dir_fattr);
2106 status = nfs_instantiate(dentry, &fhandle, &fattr);
2107 }
1da177e4
LT		 2108 return status;
2109}
2110
4f390c15 2111static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2112 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2113{
2114 struct nfs4_exception exception = { };
2115 int err;
2116 do {
2117 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2118 _nfs4_proc_symlink(dir, dentry, page,
2119 len, sattr),
1da177e4
LT		 2120 &exception);
2121 } while (exception.retry);
2122 return err;
2123}
2124
2125static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2126 struct iattr *sattr)
2127{
2128 struct nfs_server *server = NFS_SERVER(dir);
2129 struct nfs_fh fhandle;
56ae19f3 2130 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2131 struct nfs4_create_arg arg = {
2132 .dir_fh = NFS_FH(dir),
2133 .server = server,
2134 .name = &dentry->d_name,
2135 .attrs = sattr,
2136 .ftype = NF4DIR,
2137 .bitmask = server->attr_bitmask,
2138 };
2139 struct nfs4_create_res res = {
2140 .server = server,
2141 .fh = &fhandle,
2142 .fattr = &fattr,
56ae19f3 2143 .dir_fattr = &dir_fattr,
1da177e4
LT		 2144 };
2145 struct rpc_message msg = {
2146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2147 .rpc_argp = &arg,
2148 .rpc_resp = &res,
2149 };
2150 int status;
2151
0e574af1 2152 nfs_fattr_init(&fattr);
56ae19f3 2153 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2154
2155 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2156 if (!status) {
2157 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2158 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2159 status = nfs_instantiate(dentry, &fhandle, &fattr);
2160 }
2161 return status;
2162}
2163
2164static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2165 struct iattr *sattr)
2166{
2167 struct nfs4_exception exception = { };
2168 int err;
2169 do {
2170 err = nfs4_handle_exception(NFS_SERVER(dir),
2171 _nfs4_proc_mkdir(dir, dentry, sattr),
2172 &exception);
2173 } while (exception.retry);
2174 return err;
2175}
2176
2177static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2178 u64 cookie, struct page *page, unsigned int count, int plus)
2179{
2180 struct inode *dir = dentry->d_inode;
2181 struct nfs4_readdir_arg args = {
2182 .fh = NFS_FH(dir),
2183 .pages = &page,
2184 .pgbase = 0,
2185 .count = count,
2186 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2187 };
2188 struct nfs4_readdir_res res;
2189 struct rpc_message msg = {
2190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2191 .rpc_argp = &args,
2192 .rpc_resp = &res,
2193 .rpc_cred = cred,
2194 };
2195 int status;
2196
eadf4598
TM		 2197 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2198 dentry->d_parent->d_name.name,
2199 dentry->d_name.name,
2200 (unsigned long long)cookie);
1da177e4
LT		 2201 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2202 res.pgbase = args.pgbase;
2203 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2204 if (status == 0)
2205 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2206
2207 nfs_invalidate_atime(dir);
2208
eadf4598 2209 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2210 return status;
2211}
2212
2213static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2214 u64 cookie, struct page *page, unsigned int count, int plus)
2215{
2216 struct nfs4_exception exception = { };
2217 int err;
2218 do {
2219 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2220 _nfs4_proc_readdir(dentry, cred, cookie,
2221 page, count, plus),
2222 &exception);
2223 } while (exception.retry);
2224 return err;
2225}
2226
2227static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2228 struct iattr *sattr, dev_t rdev)
2229{
2230 struct nfs_server *server = NFS_SERVER(dir);
2231 struct nfs_fh fh;
56ae19f3 2232 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2233 struct nfs4_create_arg arg = {
2234 .dir_fh = NFS_FH(dir),
2235 .server = server,
2236 .name = &dentry->d_name,
2237 .attrs = sattr,
2238 .bitmask = server->attr_bitmask,
2239 };
2240 struct nfs4_create_res res = {
2241 .server = server,
2242 .fh = &fh,
2243 .fattr = &fattr,
56ae19f3 2244 .dir_fattr = &dir_fattr,
1da177e4
LT		 2245 };
2246 struct rpc_message msg = {
2247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2248 .rpc_argp = &arg,
2249 .rpc_resp = &res,
2250 };
2251 int status;
2252 int mode = sattr->ia_mode;
2253
0e574af1 2254 nfs_fattr_init(&fattr);
56ae19f3 2255 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2256
2257 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2258 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2259 if (S_ISFIFO(mode))
2260 arg.ftype = NF4FIFO;
2261 else if (S_ISBLK(mode)) {
2262 arg.ftype = NF4BLK;
2263 arg.u.device.specdata1 = MAJOR(rdev);
2264 arg.u.device.specdata2 = MINOR(rdev);
2265 }
2266 else if (S_ISCHR(mode)) {
2267 arg.ftype = NF4CHR;
2268 arg.u.device.specdata1 = MAJOR(rdev);
2269 arg.u.device.specdata2 = MINOR(rdev);
2270 }
2271 else
2272 arg.ftype = NF4SOCK;
2273
2274 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2275 if (status == 0) {
2276 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2277 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2278 status = nfs_instantiate(dentry, &fh, &fattr);
2279 }
2280 return status;
2281}
2282
2283static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2284 struct iattr *sattr, dev_t rdev)
2285{
2286 struct nfs4_exception exception = { };
2287 int err;
2288 do {
2289 err = nfs4_handle_exception(NFS_SERVER(dir),
2290 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2291 &exception);
2292 } while (exception.retry);
2293 return err;
2294}
2295
2296static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2297 struct nfs_fsstat *fsstat)
2298{
2299 struct nfs4_statfs_arg args = {
2300 .fh = fhandle,
2301 .bitmask = server->attr_bitmask,
2302 };
2303 struct rpc_message msg = {
2304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2305 .rpc_argp = &args,
2306 .rpc_resp = fsstat,
2307 };
2308
0e574af1 2309 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2310 return rpc_call_sync(server->client, &msg, 0);
2311}
2312
2313static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2314{
2315 struct nfs4_exception exception = { };
2316 int err;
2317 do {
2318 err = nfs4_handle_exception(server,
2319 _nfs4_proc_statfs(server, fhandle, fsstat),
2320 &exception);
2321 } while (exception.retry);
2322 return err;
2323}
2324
2325static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2326 struct nfs_fsinfo *fsinfo)
2327{
2328 struct nfs4_fsinfo_arg args = {
2329 .fh = fhandle,
2330 .bitmask = server->attr_bitmask,
2331 };
2332 struct rpc_message msg = {
2333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2334 .rpc_argp = &args,
2335 .rpc_resp = fsinfo,
2336 };
2337
2338 return rpc_call_sync(server->client, &msg, 0);
2339}
2340
2341static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2342{
2343 struct nfs4_exception exception = { };
2344 int err;
2345
2346 do {
2347 err = nfs4_handle_exception(server,
2348 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2349 &exception);
2350 } while (exception.retry);
2351 return err;
2352}
2353
2354static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2355{
0e574af1 2356 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2357 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2358}
2359
2360static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2361 struct nfs_pathconf *pathconf)
2362{
2363 struct nfs4_pathconf_arg args = {
2364 .fh = fhandle,
2365 .bitmask = server->attr_bitmask,
2366 };
2367 struct rpc_message msg = {
2368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2369 .rpc_argp = &args,
2370 .rpc_resp = pathconf,
2371 };
2372
2373 /* None of the pathconf attributes are mandatory to implement */
2374 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2375 memset(pathconf, 0, sizeof(*pathconf));
2376 return 0;
2377 }
2378
0e574af1 2379 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2380 return rpc_call_sync(server->client, &msg, 0);
2381}
2382
2383static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2384 struct nfs_pathconf *pathconf)
2385{
2386 struct nfs4_exception exception = { };
2387 int err;
2388
2389 do {
2390 err = nfs4_handle_exception(server,
2391 _nfs4_proc_pathconf(server, fhandle, pathconf),
2392 &exception);
2393 } while (exception.retry);
2394 return err;
2395}
2396
ec06c096 2397static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2398{
ec06c096 2399 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2400
ec06c096 2401 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2402 rpc_restart_call(task);
ec06c096 2403 return -EAGAIN;
1da177e4 2404 }
8850df99
TM		 2405
2406 nfs_invalidate_atime(data->inode);
1da177e4 2407 if (task->tk_status > 0)
ec06c096
TM		 2408 renew_lease(server, data->timestamp);
2409 return 0;
1da177e4
LT		 2410}
2411
ec06c096 2412static void nfs4_proc_read_setup(struct nfs_read_data *data)
1da177e4 2413{
1da177e4
LT		 2414 struct rpc_message msg = {
2415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2416 .rpc_argp = &data->args,
2417 .rpc_resp = &data->res,
2418 .rpc_cred = data->cred,
2419 };
1da177e4
LT		 2420
2421 data->timestamp = jiffies;
2422
ec06c096 2423 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2424}
2425
788e7a89 2426static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2427{
1da177e4
LT		 2428 struct inode *inode = data->inode;
2429
2430 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2431 rpc_restart_call(task);
788e7a89 2432 return -EAGAIN;
1da177e4 2433 }
4f9838c7 2434 if (task->tk_status >= 0) {
1da177e4 2435 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2436 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2437 }
788e7a89 2438 return 0;
1da177e4
LT		 2439}
2440
788e7a89 2441static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1da177e4 2442{
1da177e4
LT		 2443 struct rpc_message msg = {
2444 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2445 .rpc_argp = &data->args,
2446 .rpc_resp = &data->res,
2447 .rpc_cred = data->cred,
2448 };
2449 struct inode *inode = data->inode;
4f9838c7 2450 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2451 int stable;
1da177e4
LT		 2452
2453 if (how & FLUSH_STABLE) {
2454 if (!NFS_I(inode)->ncommit)
2455 stable = NFS_FILE_SYNC;
2456 else
2457 stable = NFS_DATA_SYNC;
2458 } else
2459 stable = NFS_UNSTABLE;
2460 data->args.stable = stable;
4f9838c7
TM		 2461 data->args.bitmask = server->attr_bitmask;
2462 data->res.server = server;
1da177e4
LT		 2463
2464 data->timestamp = jiffies;
2465
1da177e4 2466 /* Finalize the task. */
788e7a89 2467 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2468}
2469
788e7a89 2470static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2471{
1da177e4
LT		 2472 struct inode *inode = data->inode;
2473
2474 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2475 rpc_restart_call(task);
788e7a89 2476 return -EAGAIN;
1da177e4 2477 }
4f9838c7
TM		 2478 if (task->tk_status >= 0)
2479 nfs_post_op_update_inode(inode, data->res.fattr);
788e7a89 2480 return 0;
1da177e4
LT		 2481}
2482
788e7a89 2483static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1da177e4 2484{
1da177e4
LT		 2485 struct rpc_message msg = {
2486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2487 .rpc_argp = &data->args,
2488 .rpc_resp = &data->res,
2489 .rpc_cred = data->cred,
2490 };
788e7a89 2491 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2492
4f9838c7
TM		 2493 data->args.bitmask = server->attr_bitmask;
2494 data->res.server = server;
2495
788e7a89 2496 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2497}
2498
2499/*
2500 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2501 * standalone procedure for queueing an asynchronous RENEW.
2502 */
963d8fe5 2503static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2504{
adfa6f98 2505 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2506 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2507
2508 if (task->tk_status < 0) {
2509 switch (task->tk_status) {
2510 case -NFS4ERR_STALE_CLIENTID:
2511 case -NFS4ERR_EXPIRED:
2512 case -NFS4ERR_CB_PATH_DOWN:
2513 nfs4_schedule_state_recovery(clp);
2514 }
2515 return;
2516 }
2517 spin_lock(&clp->cl_lock);
2518 if (time_before(clp->cl_last_renewal,timestamp))
2519 clp->cl_last_renewal = timestamp;
2520 spin_unlock(&clp->cl_lock);
2521}
2522
963d8fe5
TM		 2523static const struct rpc_call_ops nfs4_renew_ops = {
2524 .rpc_call_done = nfs4_renew_done,
2525};
2526
adfa6f98 2527int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2528{
2529 struct rpc_message msg = {
2530 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2531 .rpc_argp = clp,
b4454fe1 2532 .rpc_cred = cred,
1da177e4
LT		 2533 };
2534
2535 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2536 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2537}
2538
adfa6f98 2539int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2540{
2541 struct rpc_message msg = {
2542 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2543 .rpc_argp = clp,
b4454fe1 2544 .rpc_cred = cred,
1da177e4
LT		 2545 };
2546 unsigned long now = jiffies;
2547 int status;
2548
2549 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2550 if (status < 0)
2551 return status;
2552 spin_lock(&clp->cl_lock);
2553 if (time_before(clp->cl_last_renewal,now))
2554 clp->cl_last_renewal = now;
2555 spin_unlock(&clp->cl_lock);
2556 return 0;
2557}
2558
aa1870af
BF		 2559static inline int nfs4_server_supports_acls(struct nfs_server *server)
2560{
2561 return (server->caps & NFS_CAP_ACLS)
2562 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2563 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2564}
2565
2566/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2567 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2568 * the stack.
2569 */
2570#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2571
2572static void buf_to_pages(const void *buf, size_t buflen,
2573 struct page **pages, unsigned int *pgbase)
2574{
2575 const void *p = buf;
2576
2577 *pgbase = offset_in_page(buf);
2578 p -= *pgbase;
2579 while (p < buf + buflen) {
2580 *(pages++) = virt_to_page(p);
2581 p += PAGE_CACHE_SIZE;
2582 }
2583}
2584
e50a1c2e
BF		 2585struct nfs4_cached_acl {
2586 int cached;
2587 size_t len;
3e9d4154 2588 char data[0];
e50a1c2e
BF		 2589};
2590
2591static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2592{
2593 struct nfs_inode *nfsi = NFS_I(inode);
2594
2595 spin_lock(&inode->i_lock);
2596 kfree(nfsi->nfs4_acl);
2597 nfsi->nfs4_acl = acl;
2598 spin_unlock(&inode->i_lock);
2599}
2600
2601static void nfs4_zap_acl_attr(struct inode *inode)
2602{
2603 nfs4_set_cached_acl(inode, NULL);
2604}
2605
2606static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2607{
2608 struct nfs_inode *nfsi = NFS_I(inode);
2609 struct nfs4_cached_acl *acl;
2610 int ret = -ENOENT;
2611
2612 spin_lock(&inode->i_lock);
2613 acl = nfsi->nfs4_acl;
2614 if (acl == NULL)
2615 goto out;
2616 if (buf == NULL) /* user is just asking for length */
2617 goto out_len;
2618 if (acl->cached == 0)
2619 goto out;
2620 ret = -ERANGE; /* see getxattr(2) man page */
2621 if (acl->len > buflen)
2622 goto out;
2623 memcpy(buf, acl->data, acl->len);
2624out_len:
2625 ret = acl->len;
2626out:
2627 spin_unlock(&inode->i_lock);
2628 return ret;
2629}
2630
2631static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2632{
2633 struct nfs4_cached_acl *acl;
2634
2635 if (buf && acl_len <= PAGE_SIZE) {
2636 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2637 if (acl == NULL)
2638 goto out;
2639 acl->cached = 1;
2640 memcpy(acl->data, buf, acl_len);
2641 } else {
2642 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2643 if (acl == NULL)
2644 goto out;
2645 acl->cached = 0;
2646 }
2647 acl->len = acl_len;
2648out:
2649 nfs4_set_cached_acl(inode, acl);
2650}
2651
16b4289c 2652static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2653{
aa1870af
BF		 2654 struct page *pages[NFS4ACL_MAXPAGES];
2655 struct nfs_getaclargs args = {
2656 .fh = NFS_FH(inode),
2657 .acl_pages = pages,
2658 .acl_len = buflen,
2659 };
2660 size_t resp_len = buflen;
e50a1c2e 2661 void *resp_buf;
aa1870af
BF		 2662 struct rpc_message msg = {
2663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2664 .rpc_argp = &args,
2665 .rpc_resp = &resp_len,
2666 };
e50a1c2e 2667 struct page *localpage = NULL;
aa1870af
BF		 2668 int ret;
2669
e50a1c2e
BF		 2670 if (buflen < PAGE_SIZE) {
2671 /* As long as we're doing a round trip to the server anyway,
2672 * let's be prepared for a page of acl data. */
2673 localpage = alloc_page(GFP_KERNEL);
2674 resp_buf = page_address(localpage);
2675 if (localpage == NULL)
2676 return -ENOMEM;
2677 args.acl_pages[0] = localpage;
2678 args.acl_pgbase = 0;
1d95db8e 2679 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2680 } else {
2681 resp_buf = buf;
2682 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2683 }
aa1870af 2684 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2685 if (ret)
2686 goto out_free;
2687 if (resp_len > args.acl_len)
2688 nfs4_write_cached_acl(inode, NULL, resp_len);
2689 else
2690 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2691 if (buf) {
2692 ret = -ERANGE;
2693 if (resp_len > buflen)
2694 goto out_free;
2695 if (localpage)
2696 memcpy(buf, resp_buf, resp_len);
2697 }
2698 ret = resp_len;
2699out_free:
2700 if (localpage)
2701 __free_page(localpage);
aa1870af
BF		 2702 return ret;
2703}
2704
16b4289c
TM		 2705static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2706{
2707 struct nfs4_exception exception = { };
2708 ssize_t ret;
2709 do {
2710 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2711 if (ret >= 0)
2712 break;
2713 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2714 } while (exception.retry);
2715 return ret;
2716}
2717
e50a1c2e
BF		 2718static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2719{
2720 struct nfs_server *server = NFS_SERVER(inode);
2721 int ret;
2722
2723 if (!nfs4_server_supports_acls(server))
2724 return -EOPNOTSUPP;
2725 ret = nfs_revalidate_inode(server, inode);
2726 if (ret < 0)
2727 return ret;
2728 ret = nfs4_read_cached_acl(inode, buf, buflen);
2729 if (ret != -ENOENT)
2730 return ret;
2731 return nfs4_get_acl_uncached(inode, buf, buflen);
2732}
2733
16b4289c 2734static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2735{
2736 struct nfs_server *server = NFS_SERVER(inode);
2737 struct page *pages[NFS4ACL_MAXPAGES];
2738 struct nfs_setaclargs arg = {
2739 .fh = NFS_FH(inode),
2740 .acl_pages = pages,
2741 .acl_len = buflen,
2742 };
2743 struct rpc_message msg = {
2744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2745 .rpc_argp = &arg,
2746 .rpc_resp = NULL,
2747 };
2748 int ret;
2749
2750 if (!nfs4_server_supports_acls(server))
2751 return -EOPNOTSUPP;
642ac549 2752 nfs_inode_return_delegation(inode);
4b580ee3 2753 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2754 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
08efa202 2755 nfs_zap_caches(inode);
4b580ee3
BF		 2756 return ret;
2757}
2758
16b4289c
TM		 2759static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2760{
2761 struct nfs4_exception exception = { };
2762 int err;
2763 do {
2764 err = nfs4_handle_exception(NFS_SERVER(inode),
2765 __nfs4_proc_set_acl(inode, buf, buflen),
2766 &exception);
2767 } while (exception.retry);
2768 return err;
2769}
2770
1da177e4 2771static int
faf5f49c 2772nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2773{
7539bbab 2774 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2775
2776 if (!clp || task->tk_status >= 0)
2777 return 0;
2778 switch(task->tk_status) {
2779 case -NFS4ERR_STALE_CLIENTID:
2780 case -NFS4ERR_STALE_STATEID:
2781 case -NFS4ERR_EXPIRED:
2782 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2783 nfs4_schedule_state_recovery(clp);
433fbe4c 2784 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2785 rpc_wake_up_task(task);
2786 task->tk_status = 0;
2787 return -EAGAIN;
1da177e4 2788 case -NFS4ERR_DELAY:
006ea73e
CL		 2789 nfs_inc_server_stats((struct nfs_server *) server,
2790 NFSIOS_DELAY);
2791 case -NFS4ERR_GRACE:
1da177e4
LT		 2792 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2793 task->tk_status = 0;
2794 return -EAGAIN;
2795 case -NFS4ERR_OLD_STATEID:
2796 task->tk_status = 0;
2797 return -EAGAIN;
2798 }
2799 task->tk_status = nfs4_map_errors(task->tk_status);
2800 return 0;
2801}
2802
433fbe4c
TM		 2803static int nfs4_wait_bit_interruptible(void *word)
2804{
2805 if (signal_pending(current))
2806 return -ERESTARTSYS;
2807 schedule();
2808 return 0;
2809}
2810
adfa6f98 2811static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2812{
1da177e4 2813 sigset_t oldset;
433fbe4c 2814 int res;
1da177e4
LT		 2815
2816 might_sleep();
2817
e148582e
TM		 2818 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2819
1da177e4 2820 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM		 2821 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2822 nfs4_wait_bit_interruptible,
2823 TASK_INTERRUPTIBLE);
1da177e4 2824 rpc_clnt_sigunmask(clnt, &oldset);
e148582e
TM		 2825
2826 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT		 2827 return res;
2828}
2829
2830static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2831{
2832 sigset_t oldset;
2833 int res = 0;
2834
2835 might_sleep();
2836
2837 if (*timeout <= 0)
2838 *timeout = NFS4_POLL_RETRY_MIN;
2839 if (*timeout > NFS4_POLL_RETRY_MAX)
2840 *timeout = NFS4_POLL_RETRY_MAX;
2841 rpc_clnt_sigmask(clnt, &oldset);
2842 if (clnt->cl_intr) {
041e0e3b 2843 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2844 if (signalled())
2845 res = -ERESTARTSYS;
041e0e3b
NA		 2846 } else
2847 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2848 rpc_clnt_sigunmask(clnt, &oldset);
2849 *timeout <<= 1;
2850 return res;
2851}
2852
2853/* This is the error handling routine for processes that are allowed
2854 * to sleep.
2855 */
10afec90 2856static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2857{
7539bbab 2858 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2859 int ret = errorcode;
2860
2861 exception->retry = 0;
2862 switch(errorcode) {
2863 case 0:
2864 return 0;
2865 case -NFS4ERR_STALE_CLIENTID:
2866 case -NFS4ERR_STALE_STATEID:
2867 case -NFS4ERR_EXPIRED:
433fbe4c 2868 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2869 ret = nfs4_wait_clnt_recover(server->client, clp);
2870 if (ret == 0)
2871 exception->retry = 1;
2872 break;
c514983d 2873 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2874 case -NFS4ERR_GRACE:
2875 case -NFS4ERR_DELAY:
2876 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2877 if (ret != 0)
2878 break;
1da177e4 2879 case -NFS4ERR_OLD_STATEID:
2c56617d 2880 exception->retry = 1;
1da177e4
LT		 2881 }
2882 /* We failed to handle the error */
2883 return nfs4_map_errors(ret);
2884}
2885
adfa6f98 2886int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2887{
2888 nfs4_verifier sc_verifier;
2889 struct nfs4_setclientid setclientid = {
2890 .sc_verifier = &sc_verifier,
2891 .sc_prog = program,
2892 };
2893 struct rpc_message msg = {
2894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2895 .rpc_argp = &setclientid,
2896 .rpc_resp = clp,
286d7d6a 2897 .rpc_cred = cred,
1da177e4 2898 };
bc4785cd 2899 __be32 *p;
1da177e4
LT		 2900 int loop = 0;
2901 int status;
2902
bc4785cd 2903 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2904 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2905 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2906
2907 for(;;) {
2908 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2909 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
24c8dbbb 2910 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
286d7d6a 2911 cred->cr_ops->cr_name,
1da177e4
LT		 2912 clp->cl_id_uniquifier);
2913 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2914 sizeof(setclientid.sc_netid), "tcp");
2915 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2916 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2917 clp->cl_ipaddr, port >> 8, port & 255);
2918
2919 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2920 if (status != -NFS4ERR_CLID_INUSE)
2921 break;
2922 if (signalled())
2923 break;
2924 if (loop++ & 1)
2925 ssleep(clp->cl_lease_time + 1);
2926 else
2927 if (++clp->cl_id_uniquifier == 0)
2928 break;
2929 }
2930 return status;
2931}
2932
adfa6f98 2933static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2934{
2935 struct nfs_fsinfo fsinfo;
2936 struct rpc_message msg = {
2937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2938 .rpc_argp = clp,
2939 .rpc_resp = &fsinfo,
286d7d6a 2940 .rpc_cred = cred,
1da177e4
LT		 2941 };
2942 unsigned long now;
2943 int status;
2944
2945 now = jiffies;
2946 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2947 if (status == 0) {
2948 spin_lock(&clp->cl_lock);
2949 clp->cl_lease_time = fsinfo.lease_time * HZ;
2950 clp->cl_last_renewal = now;
58d9714a 2951 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2952 spin_unlock(&clp->cl_lock);
2953 }
2954 return status;
2955}
2956
adfa6f98 2957int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM		 2958{
2959 long timeout;
2960 int err;
2961 do {
2962 err = _nfs4_proc_setclientid_confirm(clp, cred);
2963 switch (err) {
2964 case 0:
2965 return err;
2966 case -NFS4ERR_RESOURCE:
2967 /* The IBM lawyers misread another document! */
2968 case -NFS4ERR_DELAY:
2969 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2970 }
2971 } while (err == 0);
2972 return err;
2973}
2974
fe650407
TM		 2975struct nfs4_delegreturndata {
2976 struct nfs4_delegreturnargs args;
fa178f29 2977 struct nfs4_delegreturnres res;
fe650407
TM		 2978 struct nfs_fh fh;
2979 nfs4_stateid stateid;
2980 struct rpc_cred *cred;
26e976a8 2981 unsigned long timestamp;
fa178f29 2982 struct nfs_fattr fattr;
fe650407
TM		 2983 int rpc_status;
2984};
2985
2986static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 2987{
fe650407 2988 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT		 2989 struct rpc_message msg = {
2990 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407 2991 .rpc_argp = &data->args,
fa178f29 2992 .rpc_resp = &data->res,
fe650407 2993 .rpc_cred = data->cred,
1da177e4 2994 };
fa178f29 2995 nfs_fattr_init(data->res.fattr);
fe650407
TM		 2996 rpc_call_setup(task, &msg, 0);
2997}
1da177e4 2998
fe650407
TM		 2999static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3000{
3001 struct nfs4_delegreturndata *data = calldata;
3002 data->rpc_status = task->tk_status;
26e976a8 3003 if (data->rpc_status == 0)
fa178f29 3004 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3005}
3006
3007static void nfs4_delegreturn_release(void *calldata)
3008{
3009 struct nfs4_delegreturndata *data = calldata;
3010
3011 put_rpccred(data->cred);
3012 kfree(calldata);
3013}
3014
c8d149f3 3015static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3016 .rpc_call_prepare = nfs4_delegreturn_prepare,
3017 .rpc_call_done = nfs4_delegreturn_done,
3018 .rpc_release = nfs4_delegreturn_release,
3019};
3020
3021static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3022{
3023 struct nfs4_delegreturndata *data;
fa178f29 3024 struct nfs_server *server = NFS_SERVER(inode);
fe650407
TM		 3025 struct rpc_task *task;
3026 int status;
3027
3028 data = kmalloc(sizeof(*data), GFP_KERNEL);
3029 if (data == NULL)
3030 return -ENOMEM;
3031 data->args.fhandle = &data->fh;
3032 data->args.stateid = &data->stateid;
fa178f29 3033 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3034 nfs_copy_fh(&data->fh, NFS_FH(inode));
3035 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3036 data->res.fattr = &data->fattr;
3037 data->res.server = server;
fe650407 3038 data->cred = get_rpccred(cred);
26e976a8 3039 data->timestamp = jiffies;
fe650407
TM		 3040 data->rpc_status = 0;
3041
3042 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
7a1218a2 3043 if (IS_ERR(task))
fe650407 3044 return PTR_ERR(task);
fe650407 3045 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 3046 if (status == 0) {
fe650407 3047 status = data->rpc_status;
fa178f29
TM		 3048 if (status == 0)
3049 nfs_post_op_update_inode(inode, &data->fattr);
3050 }
e6b3c4db 3051 rpc_put_task(task);
fe650407 3052 return status;
1da177e4
LT		 3053}
3054
3055int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3056{
3057 struct nfs_server *server = NFS_SERVER(inode);
3058 struct nfs4_exception exception = { };
3059 int err;
3060 do {
3061 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3062 switch (err) {
3063 case -NFS4ERR_STALE_STATEID:
3064 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3065 case 0:
3066 return 0;
3067 }
3068 err = nfs4_handle_exception(server, err, &exception);
3069 } while (exception.retry);
3070 return err;
3071}
3072
3073#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3074#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3075
3076/*
3077 * sleep, with exponential backoff, and retry the LOCK operation.
3078 */
3079static unsigned long
3080nfs4_set_lock_task_retry(unsigned long timeout)
3081{
041e0e3b 3082 schedule_timeout_interruptible(timeout);
1da177e4
LT		 3083 timeout <<= 1;
3084 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3085 return NFS4_LOCK_MAXTIMEOUT;
3086 return timeout;
3087}
3088
1da177e4
LT		 3089static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3090{
3091 struct inode *inode = state->inode;
3092 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3093 struct nfs_client *clp = server->nfs_client;
911d1aaf 3094 struct nfs_lockt_args arg = {
1da177e4 3095 .fh = NFS_FH(inode),
911d1aaf 3096 .fl = request,
1da177e4 3097 };
911d1aaf
TM		 3098 struct nfs_lockt_res res = {
3099 .denied = request,
1da177e4
LT		 3100 };
3101 struct rpc_message msg = {
3102 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3103 .rpc_argp = &arg,
3104 .rpc_resp = &res,
3105 .rpc_cred = state->owner->so_cred,
3106 };
1da177e4
LT		 3107 struct nfs4_lock_state *lsp;
3108 int status;
3109
3110 down_read(&clp->cl_sem);
911d1aaf 3111 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3112 status = nfs4_set_lock_state(state, request);
3113 if (status != 0)
3114 goto out;
3115 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3116 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3117 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3118 switch (status) {
3119 case 0:
3120 request->fl_type = F_UNLCK;
3121 break;
3122 case -NFS4ERR_DENIED:
3123 status = 0;
1da177e4 3124 }
70cc6487 3125 request->fl_ops->fl_release_private(request);
8d0a8a9d 3126out:
1da177e4
LT		 3127 up_read(&clp->cl_sem);
3128 return status;
3129}
3130
3131static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3132{
3133 struct nfs4_exception exception = { };
3134 int err;
3135
3136 do {
3137 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3138 _nfs4_proc_getlk(state, cmd, request),
3139 &exception);
3140 } while (exception.retry);
3141 return err;
3142}
3143
3144static int do_vfs_lock(struct file *file, struct file_lock *fl)
3145{
3146 int res = 0;
3147 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3148 case FL_POSIX:
3149 res = posix_lock_file_wait(file, fl);
3150 break;
3151 case FL_FLOCK:
3152 res = flock_lock_file_wait(file, fl);
3153 break;
3154 default:
3155 BUG();
3156 }
1da177e4
LT		 3157 return res;
3158}
3159
faf5f49c 3160struct nfs4_unlockdata {
911d1aaf
TM		 3161 struct nfs_locku_args arg;
3162 struct nfs_locku_res res;
faf5f49c
TM		 3163 struct nfs4_lock_state *lsp;
3164 struct nfs_open_context *ctx;
911d1aaf
TM		 3165 struct file_lock fl;
3166 const struct nfs_server *server;
26e976a8 3167 unsigned long timestamp;
faf5f49c
TM		 3168};
3169
911d1aaf
TM		 3170static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3171 struct nfs_open_context *ctx,
3172 struct nfs4_lock_state *lsp,
3173 struct nfs_seqid *seqid)
3174{
3175 struct nfs4_unlockdata *p;
3176 struct inode *inode = lsp->ls_state->inode;
3177
3178 p = kmalloc(sizeof(*p), GFP_KERNEL);
3179 if (p == NULL)
3180 return NULL;
3181 p->arg.fh = NFS_FH(inode);
3182 p->arg.fl = &p->fl;
3183 p->arg.seqid = seqid;
3184 p->arg.stateid = &lsp->ls_stateid;
3185 p->lsp = lsp;
3186 atomic_inc(&lsp->ls_count);
3187 /* Ensure we don't close file until we're done freeing locks! */
3188 p->ctx = get_nfs_open_context(ctx);
3189 memcpy(&p->fl, fl, sizeof(p->fl));
3190 p->server = NFS_SERVER(inode);
3191 return p;
3192}
3193
06f814a3 3194static void nfs4_locku_release_calldata(void *data)
faf5f49c 3195{
963d8fe5 3196 struct nfs4_unlockdata *calldata = data;
911d1aaf 3197 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3198 nfs4_put_lock_state(calldata->lsp);
3199 put_nfs_open_context(calldata->ctx);
3200 kfree(calldata);
faf5f49c
TM		 3201}
3202
963d8fe5 3203static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3204{
963d8fe5 3205 struct nfs4_unlockdata *calldata = data;
faf5f49c 3206
06f814a3
TM		 3207 if (RPC_ASSASSINATED(task))
3208 return;
911d1aaf 3209 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3210 switch (task->tk_status) {
3211 case 0:
3212 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3213 calldata->res.stateid.data,
faf5f49c 3214 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3215 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3216 break;
3217 case -NFS4ERR_STALE_STATEID:
3218 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3219 break;
3220 default:
a6a352e9 3221 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
faf5f49c 3222 rpc_restart_call(task);
faf5f49c 3223 }
faf5f49c
TM		 3224}
3225
4ce70ada 3226static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3227{
4ce70ada 3228 struct nfs4_unlockdata *calldata = data;
1da177e4
LT		 3229 struct rpc_message msg = {
3230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM		 3231 .rpc_argp = &calldata->arg,
3232 .rpc_resp = &calldata->res,
3233 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3234 };
faf5f49c 3235
911d1aaf 3236 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3237 return;
3238 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3239 /* Note: exit _without_ running nfs4_locku_done */
3240 task->tk_action = NULL;
faf5f49c
TM		 3241 return;
3242 }
26e976a8 3243 calldata->timestamp = jiffies;
faf5f49c
TM		 3244 rpc_call_setup(task, &msg, 0);
3245}
3246
963d8fe5 3247static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3248 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3249 .rpc_call_done = nfs4_locku_done,
06f814a3 3250 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3251};
3252
a5d16a4d
TM		 3253static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3254 struct nfs_open_context *ctx,
3255 struct nfs4_lock_state *lsp,
3256 struct nfs_seqid *seqid)
3257{
3258 struct nfs4_unlockdata *data;
a5d16a4d 3259
137d6aca
FF		 3260 /* Ensure this is an unlock - when canceling a lock, the
3261 * canceled lock is passed in, and it won't be an unlock.
3262 */
3263 fl->fl_type = F_UNLCK;
3264
a5d16a4d
TM		 3265 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3266 if (data == NULL) {
3267 nfs_free_seqid(seqid);
3268 return ERR_PTR(-ENOMEM);
3269 }
3270
7a1218a2 3271 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
a5d16a4d
TM		 3272}
3273
faf5f49c
TM		 3274static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3275{
911d1aaf 3276 struct nfs_seqid *seqid;
1da177e4 3277 struct nfs4_lock_state *lsp;
06f814a3
TM		 3278 struct rpc_task *task;
3279 int status = 0;
faf5f49c 3280
8d0a8a9d 3281 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3282 /* Unlock _before_ we do the RPC call */
3283 request->fl_flags |= FL_EXISTS;
3284 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3285 goto out;
8d0a8a9d 3286 if (status != 0)
9b073574
TM		 3287 goto out;
3288 /* Is this a delegated lock? */
3289 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3290 goto out;
8d0a8a9d 3291 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3292 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3293 status = -ENOMEM;
911d1aaf 3294 if (seqid == NULL)
9b073574 3295 goto out;
cd3758e3 3296 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3297 status = PTR_ERR(task);
3298 if (IS_ERR(task))
9b073574 3299 goto out;
a5d16a4d 3300 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3301 rpc_put_task(task);
9b073574 3302out:
1da177e4
LT		 3303 return status;
3304}
3305
a5d16a4d
TM		 3306struct nfs4_lockdata {
3307 struct nfs_lock_args arg;
3308 struct nfs_lock_res res;
3309 struct nfs4_lock_state *lsp;
3310 struct nfs_open_context *ctx;
3311 struct file_lock fl;
26e976a8 3312 unsigned long timestamp;
a5d16a4d
TM		 3313 int rpc_status;
3314 int cancelled;
3315};
3316
3317static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3318 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3319{
a5d16a4d
TM		 3320 struct nfs4_lockdata *p;
3321 struct inode *inode = lsp->ls_state->inode;
1da177e4 3322 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3323
3324 p = kzalloc(sizeof(*p), GFP_KERNEL);
3325 if (p == NULL)
3326 return NULL;
3327
3328 p->arg.fh = NFS_FH(inode);
3329 p->arg.fl = &p->fl;
3330 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3331 if (p->arg.lock_seqid == NULL)
3332 goto out_free;
3333 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3334 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3335 p->arg.lock_owner.id = lsp->ls_id.id;
a5d16a4d
TM		 3336 p->lsp = lsp;
3337 atomic_inc(&lsp->ls_count);
3338 p->ctx = get_nfs_open_context(ctx);
3339 memcpy(&p->fl, fl, sizeof(p->fl));
3340 return p;
3341out_free:
3342 kfree(p);
3343 return NULL;
3344}
3345
3346static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3347{
3348 struct nfs4_lockdata *data = calldata;
3349 struct nfs4_state *state = data->lsp->ls_state;
3350 struct nfs4_state_owner *sp = state->owner;
1da177e4 3351 struct rpc_message msg = {
a5d16a4d
TM		 3352 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3353 .rpc_argp = &data->arg,
3354 .rpc_resp = &data->res,
3355 .rpc_cred = sp->so_cred,
1da177e4 3356 };
06735b34 3357
a5d16a4d
TM		 3358 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3359 return;
3360 dprintk("%s: begin!\n", __FUNCTION__);
3361 /* Do we need to do an open_to_lock_owner? */
3362 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3363 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3364 if (data->arg.open_seqid == NULL) {
3365 data->rpc_status = -ENOMEM;
3366 task->tk_action = NULL;
06735b34 3367 goto out;
8d0a8a9d 3368 }
a5d16a4d
TM		 3369 data->arg.open_stateid = &state->stateid;
3370 data->arg.new_lock_owner = 1;
3371 }
26e976a8 3372 data->timestamp = jiffies;
a5d16a4d 3373 rpc_call_setup(task, &msg, 0);
06735b34 3374out:
a5d16a4d
TM		 3375 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3376}
3377
3378static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3379{
3380 struct nfs4_lockdata *data = calldata;
3381
3382 dprintk("%s: begin!\n", __FUNCTION__);
3383
3384 data->rpc_status = task->tk_status;
3385 if (RPC_ASSASSINATED(task))
3386 goto out;
3387 if (data->arg.new_lock_owner != 0) {
3388 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3389 if (data->rpc_status == 0)
3390 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3391 else
3392 goto out;
3393 }
3394 if (data->rpc_status == 0) {
3395 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3396 sizeof(data->lsp->ls_stateid.data));
3397 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3398 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3399 }
3400 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3401out:
3402 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3403}
3404
3405static void nfs4_lock_release(void *calldata)
3406{
3407 struct nfs4_lockdata *data = calldata;
3408
3409 dprintk("%s: begin!\n", __FUNCTION__);
3410 if (data->arg.open_seqid != NULL)
3411 nfs_free_seqid(data->arg.open_seqid);
3412 if (data->cancelled != 0) {
3413 struct rpc_task *task;
3414 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3415 data->arg.lock_seqid);
3416 if (!IS_ERR(task))
e6b3c4db 3417 rpc_put_task(task);
a5d16a4d
TM		 3418 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3419 } else
3420 nfs_free_seqid(data->arg.lock_seqid);
3421 nfs4_put_lock_state(data->lsp);
3422 put_nfs_open_context(data->ctx);
3423 kfree(data);
3424 dprintk("%s: done!\n", __FUNCTION__);
3425}
3426
3427static const struct rpc_call_ops nfs4_lock_ops = {
3428 .rpc_call_prepare = nfs4_lock_prepare,
3429 .rpc_call_done = nfs4_lock_done,
3430 .rpc_release = nfs4_lock_release,
3431};
3432
3433static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3434{
3435 struct nfs4_lockdata *data;
3436 struct rpc_task *task;
3437 int ret;
3438
3439 dprintk("%s: begin!\n", __FUNCTION__);
cd3758e3 3440 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3441 fl->fl_u.nfs4_fl.owner);
3442 if (data == NULL)
3443 return -ENOMEM;
3444 if (IS_SETLKW(cmd))
3445 data->arg.block = 1;
3446 if (reclaim != 0)
3447 data->arg.reclaim = 1;
3448 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3449 &nfs4_lock_ops, data);
7a1218a2 3450 if (IS_ERR(task))
a5d16a4d 3451 return PTR_ERR(task);
a5d16a4d
TM		 3452 ret = nfs4_wait_for_completion_rpc_task(task);
3453 if (ret == 0) {
3454 ret = data->rpc_status;
3455 if (ret == -NFS4ERR_DENIED)
3456 ret = -EAGAIN;
3457 } else
3458 data->cancelled = 1;
e6b3c4db 3459 rpc_put_task(task);
a5d16a4d
TM		 3460 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3461 return ret;
1da177e4
LT		 3462}
3463
3464static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3465{
202b50dc
TM		 3466 struct nfs_server *server = NFS_SERVER(state->inode);
3467 struct nfs4_exception exception = { };
3468 int err;
3469
3470 do {
42a2d13e
TM		 3471 /* Cache the lock if possible... */
3472 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3473 return 0;
202b50dc
TM		 3474 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3475 if (err != -NFS4ERR_DELAY)
3476 break;
3477 nfs4_handle_exception(server, err, &exception);
3478 } while (exception.retry);
3479 return err;
1da177e4
LT		 3480}
3481
3482static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3483{
202b50dc
TM		 3484 struct nfs_server *server = NFS_SERVER(state->inode);
3485 struct nfs4_exception exception = { };
3486 int err;
3487
6bfc93ef
TM		 3488 err = nfs4_set_lock_state(state, request);
3489 if (err != 0)
3490 return err;
202b50dc 3491 do {
42a2d13e
TM		 3492 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3493 return 0;
202b50dc
TM		 3494 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3495 if (err != -NFS4ERR_DELAY)
3496 break;
3497 nfs4_handle_exception(server, err, &exception);
3498 } while (exception.retry);
3499 return err;
1da177e4
LT		 3500}
3501
3502static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3503{
adfa6f98 3504 struct nfs_client *clp = state->owner->so_client;
01c3b861 3505 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3506 int status;
3507
6bfc93ef 3508 /* Is this a delegated open? */
6bfc93ef
TM		 3509 status = nfs4_set_lock_state(state, request);
3510 if (status != 0)
3511 goto out;
01c3b861
TM		 3512 request->fl_flags |= FL_ACCESS;
3513 status = do_vfs_lock(request->fl_file, request);
3514 if (status < 0)
3515 goto out;
3516 down_read(&clp->cl_sem);
3517 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3518 struct nfs_inode *nfsi = NFS_I(state->inode);
3519 /* Yes: cache locks! */
3520 down_read(&nfsi->rwsem);
3521 /* ...but avoid races with delegation recall... */
3522 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3523 request->fl_flags = fl_flags & ~FL_SLEEP;
3524 status = do_vfs_lock(request->fl_file, request);
3525 up_read(&nfsi->rwsem);
3526 goto out_unlock;
3527 }
3528 up_read(&nfsi->rwsem);
3529 }
6bfc93ef
TM		 3530 status = _nfs4_do_setlk(state, cmd, request, 0);
3531 if (status != 0)
01c3b861 3532 goto out_unlock;
6bfc93ef 3533 /* Note: we always want to sleep here! */
01c3b861 3534 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef
TM		 3535 if (do_vfs_lock(request->fl_file, request) < 0)
3536 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
01c3b861 3537out_unlock:
1da177e4 3538 up_read(&clp->cl_sem);
01c3b861
TM		 3539out:
3540 request->fl_flags = fl_flags;
1da177e4
LT		 3541 return status;
3542}
3543
3544static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3545{
3546 struct nfs4_exception exception = { };
3547 int err;
3548
3549 do {
3550 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3551 _nfs4_proc_setlk(state, cmd, request),
3552 &exception);
3553 } while (exception.retry);
3554 return err;
3555}
3556
3557static int
3558nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3559{
3560 struct nfs_open_context *ctx;
3561 struct nfs4_state *state;
3562 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3563 int status;
3564
3565 /* verify open state */
cd3758e3 3566 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3567 state = ctx->state;
3568
3569 if (request->fl_start < 0 || request->fl_end < 0)
3570 return -EINVAL;
3571
3572 if (IS_GETLK(cmd))
3573 return nfs4_proc_getlk(state, F_GETLK, request);
3574
3575 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3576 return -EINVAL;
3577
3578 if (request->fl_type == F_UNLCK)
3579 return nfs4_proc_unlck(state, cmd, request);
3580
3581 do {
3582 status = nfs4_proc_setlk(state, cmd, request);
3583 if ((status != -EAGAIN) || IS_SETLK(cmd))
3584 break;
3585 timeout = nfs4_set_lock_task_retry(timeout);
3586 status = -ERESTARTSYS;
3587 if (signalled())
3588 break;
3589 } while(status < 0);
1da177e4
LT		 3590 return status;
3591}
3592
888e694c
TM		 3593int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3594{
3595 struct nfs_server *server = NFS_SERVER(state->inode);
3596 struct nfs4_exception exception = { };
3597 int err;
3598
3599 err = nfs4_set_lock_state(state, fl);
3600 if (err != 0)
3601 goto out;
3602 do {
3603 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3604 if (err != -NFS4ERR_DELAY)
3605 break;
3606 err = nfs4_handle_exception(server, err, &exception);
3607 } while (exception.retry);
3608out:
3609 return err;
3610}
6b3b5496 3611
aa1870af
BF		 3612#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3613
6b3b5496
BF		 3614int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3615 size_t buflen, int flags)
3616{
4b580ee3
BF		 3617 struct inode *inode = dentry->d_inode;
3618
3619 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3620 return -EOPNOTSUPP;
3621
3622 if (!S_ISREG(inode->i_mode) &&
3623 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3624 return -EPERM;
3625
3626 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3627}
3628
3629/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3630 * and that's what we'll do for e.g. user attributes that haven't been set.
3631 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3632 * attributes in kernel-managed attribute namespaces. */
3633ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3634 size_t buflen)
3635{
aa1870af
BF		 3636 struct inode *inode = dentry->d_inode;
3637
3638 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3639 return -EOPNOTSUPP;
3640
3641 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3642}
3643
3644ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3645{
aa1870af 3646 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3647
096455a2
BF		 3648 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3649 return 0;
6b3b5496
BF		 3650 if (buf && buflen < len)
3651 return -ERANGE;
3652 if (buf)
aa1870af
BF		 3653 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3654 return len;
6b3b5496
BF		 3655}
3656
56659e99 3657int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3658 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3659{
3660 struct nfs_server *server = NFS_SERVER(dir);
3661 u32 bitmask[2] = {
361e624f
MN		 3662 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3663 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3664 };
3665 struct nfs4_fs_locations_arg args = {
3666 .dir_fh = NFS_FH(dir),
c228fd3a 3667 .name = name,
683b57b4
TM		 3668 .page = page,
3669 .bitmask = bitmask,
3670 };
3671 struct rpc_message msg = {
3672 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3673 .rpc_argp = &args,
7aaa0b3b 3674 .rpc_resp = fs_locations,
683b57b4
TM		 3675 };
3676 int status;
3677
3678 dprintk("%s: start\n", __FUNCTION__);
c228fd3a 3679 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3680 fs_locations->server = server;
830b8e33 3681 fs_locations->nlocations = 0;
683b57b4
TM		 3682 status = rpc_call_sync(server->client, &msg, 0);
3683 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3684 return status;
3685}
3686
1da177e4
LT		 3687struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3688 .recover_open = nfs4_open_reclaim,
3689 .recover_lock = nfs4_lock_reclaim,
3690};
3691
3692struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3693 .recover_open = nfs4_open_expired,
3694 .recover_lock = nfs4_lock_expired,
3695};
3696
92e1d5be 3697static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3698 .permission = nfs_permission,
3699 .getattr = nfs_getattr,
3700 .setattr = nfs_setattr,
3701 .getxattr = nfs4_getxattr,
3702 .setxattr = nfs4_setxattr,
3703 .listxattr = nfs4_listxattr,
3704};
3705
509de811 3706const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3707 .version = 4, /* protocol version */
3708 .dentry_ops = &nfs4_dentry_operations,
3709 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3710 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3711 .getroot = nfs4_proc_get_root,
3712 .getattr = nfs4_proc_getattr,
3713 .setattr = nfs4_proc_setattr,
2b3de441 3714 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3715 .lookup = nfs4_proc_lookup,
3716 .access = nfs4_proc_access,
3717 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3718 .create = nfs4_proc_create,
3719 .remove = nfs4_proc_remove,
3720 .unlink_setup = nfs4_proc_unlink_setup,
3721 .unlink_done = nfs4_proc_unlink_done,
3722 .rename = nfs4_proc_rename,
3723 .link = nfs4_proc_link,
3724 .symlink = nfs4_proc_symlink,
3725 .mkdir = nfs4_proc_mkdir,
3726 .rmdir = nfs4_proc_remove,
3727 .readdir = nfs4_proc_readdir,
3728 .mknod = nfs4_proc_mknod,
3729 .statfs = nfs4_proc_statfs,
3730 .fsinfo = nfs4_proc_fsinfo,
3731 .pathconf = nfs4_proc_pathconf,
e9326dca 3732 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3733 .decode_dirent = nfs4_decode_dirent,
3734 .read_setup = nfs4_proc_read_setup,
ec06c096 3735 .read_done = nfs4_read_done,
1da177e4 3736 .write_setup = nfs4_proc_write_setup,
788e7a89 3737 .write_done = nfs4_write_done,
1da177e4 3738 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3739 .commit_done = nfs4_commit_done,
02a913a7
TM		 3740 .file_open = nfs_open,
3741 .file_release = nfs_release,
1da177e4 3742 .lock = nfs4_proc_lock,
e50a1c2e 3743 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3744};
3745
3746/*
3747 * Local variables:
3748 * c-basic-offset: 8
3749 * End:
3750 */
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