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NFS: Don't use readdirplus data if the page cache is invalid
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
006ea73e 54#include "iostat.h"
1da177e4
LT		 55
56#define NFSDBG_FACILITY NFSDBG_PROC
57
2066fe89 58#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 59#define NFS4_POLL_RETRY_MAX (15*HZ)
60
cdd4e68b 61struct nfs4_opendata;
864472e9 62static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 63static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
faf5f49c 64static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
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
TM		 1401 if (IS_ERR(state)) {
1402 if (PTR_ERR(state) == -ENOENT)
1403 d_add(dentry, NULL);
1404 return (struct dentry *)state;
1405 }
24ac23ab 1406 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1407 if (res != NULL)
deee9369 1408 path.dentry = res;
4a35bd41 1409 nfs4_intent_set_file(nd, &path, state);
02a913a7 1410 return res;
1da177e4
LT		 1411}
1412
1413int
02a913a7 1414nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1415{
ad389da7
TM		 1416 struct path path = {
1417 .mnt = nd->mnt,
1418 .dentry = dentry,
1419 };
1da177e4
LT		 1420 struct rpc_cred *cred;
1421 struct nfs4_state *state;
1da177e4 1422
1f163415 1423 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1424 if (IS_ERR(cred))
1425 return PTR_ERR(cred);
aac00a8d 1426 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1427 put_rpccred(cred);
02a913a7
TM		 1428 if (IS_ERR(state)) {
1429 switch (PTR_ERR(state)) {
1430 case -EPERM:
1431 case -EACCES:
1432 case -EDQUOT:
1433 case -ENOSPC:
1434 case -EROFS:
1435 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1436 return 1;
b87c0adf
CL		 1437 default:
1438 goto out_drop;
02a913a7 1439 }
02a913a7 1440 }
24ac23ab 1441 if (state->inode == dentry->d_inode) {
4a35bd41 1442 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1443 return 1;
1444 }
4a35bd41 1445 nfs4_close_state(&path, state, openflags);
02a913a7
TM		 1446out_drop:
1447 d_drop(dentry);
1da177e4
LT		 1448 return 0;
1449}
1450
1451
1452static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1453{
1454 struct nfs4_server_caps_res res = {};
1455 struct rpc_message msg = {
1456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1457 .rpc_argp = fhandle,
1458 .rpc_resp = &res,
1459 };
1460 int status;
1461
1462 status = rpc_call_sync(server->client, &msg, 0);
1463 if (status == 0) {
1464 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1465 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1466 server->caps |= NFS_CAP_ACLS;
1467 if (res.has_links != 0)
1468 server->caps |= NFS_CAP_HARDLINKS;
1469 if (res.has_symlinks != 0)
1470 server->caps |= NFS_CAP_SYMLINKS;
1471 server->acl_bitmask = res.acl_bitmask;
1472 }
1473 return status;
1474}
1475
55a97593 1476int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1477{
1478 struct nfs4_exception exception = { };
1479 int err;
1480 do {
1481 err = nfs4_handle_exception(server,
1482 _nfs4_server_capabilities(server, fhandle),
1483 &exception);
1484 } while (exception.retry);
1485 return err;
1486}
1487
1488static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1489 struct nfs_fsinfo *info)
1490{
1da177e4
LT		 1491 struct nfs4_lookup_root_arg args = {
1492 .bitmask = nfs4_fattr_bitmap,
1493 };
1494 struct nfs4_lookup_res res = {
1495 .server = server,
0e574af1 1496 .fattr = info->fattr,
1da177e4
LT		 1497 .fh = fhandle,
1498 };
1499 struct rpc_message msg = {
1500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1501 .rpc_argp = &args,
1502 .rpc_resp = &res,
1503 };
0e574af1 1504 nfs_fattr_init(info->fattr);
1da177e4
LT		 1505 return rpc_call_sync(server->client, &msg, 0);
1506}
1507
1508static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1509 struct nfs_fsinfo *info)
1510{
1511 struct nfs4_exception exception = { };
1512 int err;
1513 do {
1514 err = nfs4_handle_exception(server,
1515 _nfs4_lookup_root(server, fhandle, info),
1516 &exception);
1517 } while (exception.retry);
1518 return err;
1519}
1520
54ceac45
DH		 1521/*
1522 * get the file handle for the "/" directory on the server
1523 */
1da177e4 1524static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1525 struct nfs_fsinfo *info)
1da177e4 1526{
1da177e4
LT		 1527 int status;
1528
1da177e4 1529 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1530 if (status == 0)
1531 status = nfs4_server_capabilities(server, fhandle);
1532 if (status == 0)
1533 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1534 return nfs4_map_errors(status);
1da177e4
LT		 1535}
1536
6b97fd3d
MN		 1537/*
1538 * Get locations and (maybe) other attributes of a referral.
1539 * Note that we'll actually follow the referral later when
1540 * we detect fsid mismatch in inode revalidation
1541 */
56659e99 1542static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1543{
1544 int status = -ENOMEM;
1545 struct page *page = NULL;
1546 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1547
1548 page = alloc_page(GFP_KERNEL);
1549 if (page == NULL)
1550 goto out;
1551 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1552 if (locations == NULL)
1553 goto out;
1554
c228fd3a 1555 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1556 if (status != 0)
1557 goto out;
1558 /* Make sure server returned a different fsid for the referral */
1559 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1560 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1561 status = -EIO;
1562 goto out;
1563 }
1564
1565 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1566 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1567 if (!fattr->mode)
1568 fattr->mode = S_IFDIR;
1569 memset(fhandle, 0, sizeof(struct nfs_fh));
1570out:
1571 if (page)
1572 __free_page(page);
1573 if (locations)
1574 kfree(locations);
1575 return status;
1576}
1577
1da177e4
LT		 1578static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1579{
1580 struct nfs4_getattr_arg args = {
1581 .fh = fhandle,
1582 .bitmask = server->attr_bitmask,
1583 };
1584 struct nfs4_getattr_res res = {
1585 .fattr = fattr,
1586 .server = server,
1587 };
1588 struct rpc_message msg = {
1589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1590 .rpc_argp = &args,
1591 .rpc_resp = &res,
1592 };
1593
0e574af1 1594 nfs_fattr_init(fattr);
1da177e4
LT		 1595 return rpc_call_sync(server->client, &msg, 0);
1596}
1597
1598static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1599{
1600 struct nfs4_exception exception = { };
1601 int err;
1602 do {
1603 err = nfs4_handle_exception(server,
1604 _nfs4_proc_getattr(server, fhandle, fattr),
1605 &exception);
1606 } while (exception.retry);
1607 return err;
1608}
1609
1610/*
1611 * The file is not closed if it is opened due to the a request to change
1612 * the size of the file. The open call will not be needed once the
1613 * VFS layer lookup-intents are implemented.
1614 *
1615 * Close is called when the inode is destroyed.
1616 * If we haven't opened the file for O_WRONLY, we
1617 * need to in the size_change case to obtain a stateid.
1618 *
1619 * Got race?
1620 * Because OPEN is always done by name in nfsv4, it is
1621 * possible that we opened a different file by the same
1622 * name. We can recognize this race condition, but we
1623 * can't do anything about it besides returning an error.
1624 *
1625 * This will be fixed with VFS changes (lookup-intent).
1626 */
1627static int
1628nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1629 struct iattr *sattr)
1630{
08e9eac4
TM		 1631 struct rpc_cred *cred;
1632 struct inode *inode = dentry->d_inode;
d530838b
TM		 1633 struct nfs_open_context *ctx;
1634 struct nfs4_state *state = NULL;
1da177e4
LT		 1635 int status;
1636
0e574af1 1637 nfs_fattr_init(fattr);
1da177e4 1638
1f163415 1639 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
08e9eac4
TM		 1640 if (IS_ERR(cred))
1641 return PTR_ERR(cred);
d530838b
TM		 1642
1643 /* Search for an existing open(O_WRITE) file */
1644 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1645 if (ctx != NULL)
1646 state = ctx->state;
08e9eac4 1647
3e4f6290 1648 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1649 if (status == 0)
1650 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1651 if (ctx != NULL)
1652 put_nfs_open_context(ctx);
08e9eac4 1653 put_rpccred(cred);
1da177e4
LT		 1654 return status;
1655}
1656
56659e99
TM		 1657static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1658 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1659 struct nfs_fattr *fattr)
1660{
1661 int status;
1662 struct nfs4_lookup_arg args = {
1663 .bitmask = server->attr_bitmask,
1664 .dir_fh = dirfh,
1665 .name = name,
1666 };
1667 struct nfs4_lookup_res res = {
1668 .server = server,
1669 .fattr = fattr,
1670 .fh = fhandle,
1671 };
1672 struct rpc_message msg = {
1673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1674 .rpc_argp = &args,
1675 .rpc_resp = &res,
1676 };
1677
1678 nfs_fattr_init(fattr);
1679
1680 dprintk("NFS call lookupfh %s\n", name->name);
1681 status = rpc_call_sync(server->client, &msg, 0);
1682 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1683 return status;
1684}
1685
1686static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1687 struct qstr *name, struct nfs_fh *fhandle,
1688 struct nfs_fattr *fattr)
1689{
1690 struct nfs4_exception exception = { };
1691 int err;
1692 do {
4e56e082
TM		 1693 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1694 /* FIXME: !!!! */
1695 if (err == -NFS4ERR_MOVED) {
1696 err = -EREMOTE;
1697 break;
1698 }
1699 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1700 } while (exception.retry);
1701 return err;
1702}
1703
56659e99 1704static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1705 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1706{
4e56e082 1707 int status;
1da177e4
LT		 1708
1709 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1710 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1711 if (status == -NFS4ERR_MOVED)
1712 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1713 dprintk("NFS reply lookup: %d\n", status);
1714 return status;
1715}
1716
1717static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1718{
1719 struct nfs4_exception exception = { };
1720 int err;
1721 do {
1722 err = nfs4_handle_exception(NFS_SERVER(dir),
1723 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1724 &exception);
1725 } while (exception.retry);
1726 return err;
1727}
1728
1729static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1730{
76b32999
TM		 1731 struct nfs_server *server = NFS_SERVER(inode);
1732 struct nfs_fattr fattr;
1da177e4
LT		 1733 struct nfs4_accessargs args = {
1734 .fh = NFS_FH(inode),
76b32999
TM		 1735 .bitmask = server->attr_bitmask,
1736 };
1737 struct nfs4_accessres res = {
1738 .server = server,
1739 .fattr = &fattr,
1da177e4 1740 };
1da177e4
LT		 1741 struct rpc_message msg = {
1742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1743 .rpc_argp = &args,
1744 .rpc_resp = &res,
1745 .rpc_cred = entry->cred,
1746 };
1747 int mode = entry->mask;
1748 int status;
1749
1750 /*
1751 * Determine which access bits we want to ask for...
1752 */
1753 if (mode & MAY_READ)
1754 args.access |= NFS4_ACCESS_READ;
1755 if (S_ISDIR(inode->i_mode)) {
1756 if (mode & MAY_WRITE)
1757 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1758 if (mode & MAY_EXEC)
1759 args.access |= NFS4_ACCESS_LOOKUP;
1760 } else {
1761 if (mode & MAY_WRITE)
1762 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1763 if (mode & MAY_EXEC)
1764 args.access |= NFS4_ACCESS_EXECUTE;
1765 }
76b32999 1766 nfs_fattr_init(&fattr);
1da177e4
LT		 1767 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1768 if (!status) {
1769 entry->mask = 0;
1770 if (res.access & NFS4_ACCESS_READ)
1771 entry->mask |= MAY_READ;
1772 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1773 entry->mask |= MAY_WRITE;
1774 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1775 entry->mask |= MAY_EXEC;
76b32999 1776 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1777 }
1778 return status;
1779}
1780
1781static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1782{
1783 struct nfs4_exception exception = { };
1784 int err;
1785 do {
1786 err = nfs4_handle_exception(NFS_SERVER(inode),
1787 _nfs4_proc_access(inode, entry),
1788 &exception);
1789 } while (exception.retry);
1790 return err;
1791}
1792
1793/*
1794 * TODO: For the time being, we don't try to get any attributes
1795 * along with any of the zero-copy operations READ, READDIR,
1796 * READLINK, WRITE.
1797 *
1798 * In the case of the first three, we want to put the GETATTR
1799 * after the read-type operation -- this is because it is hard
1800 * to predict the length of a GETATTR response in v4, and thus
1801 * align the READ data correctly. This means that the GETATTR
1802 * may end up partially falling into the page cache, and we should
1803 * shift it into the 'tail' of the xdr_buf before processing.
1804 * To do this efficiently, we need to know the total length
1805 * of data received, which doesn't seem to be available outside
1806 * of the RPC layer.
1807 *
1808 * In the case of WRITE, we also want to put the GETATTR after
1809 * the operation -- in this case because we want to make sure
1810 * we get the post-operation mtime and size. This means that
1811 * we can't use xdr_encode_pages() as written: we need a variant
1812 * of it which would leave room in the 'tail' iovec.
1813 *
1814 * Both of these changes to the XDR layer would in fact be quite
1815 * minor, but I decided to leave them for a subsequent patch.
1816 */
1817static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1818 unsigned int pgbase, unsigned int pglen)
1819{
1820 struct nfs4_readlink args = {
1821 .fh = NFS_FH(inode),
1822 .pgbase = pgbase,
1823 .pglen = pglen,
1824 .pages = &page,
1825 };
1826 struct rpc_message msg = {
1827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1828 .rpc_argp = &args,
1829 .rpc_resp = NULL,
1830 };
1831
1832 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1833}
1834
1835static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1836 unsigned int pgbase, unsigned int pglen)
1837{
1838 struct nfs4_exception exception = { };
1839 int err;
1840 do {
1841 err = nfs4_handle_exception(NFS_SERVER(inode),
1842 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1843 &exception);
1844 } while (exception.retry);
1845 return err;
1846}
1847
1da177e4
LT		 1848/*
1849 * Got race?
1850 * We will need to arrange for the VFS layer to provide an atomic open.
1851 * Until then, this create/open method is prone to inefficiency and race
1852 * conditions due to the lookup, create, and open VFS calls from sys_open()
1853 * placed on the wire.
1854 *
1855 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1856 * The file will be opened again in the subsequent VFS open call
1857 * (nfs4_proc_file_open).
1858 *
1859 * The open for read will just hang around to be used by any process that
1860 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1861 */
1862
1863static int
1864nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1865 int flags, struct nameidata *nd)
1da177e4 1866{
ad389da7
TM		 1867 struct path path = {
1868 .mnt = nd->mnt,
1869 .dentry = dentry,
1870 };
1da177e4
LT		 1871 struct nfs4_state *state;
1872 struct rpc_cred *cred;
1873 int status = 0;
1874
1f163415 1875 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1876 if (IS_ERR(cred)) {
1877 status = PTR_ERR(cred);
1878 goto out;
1879 }
ad389da7 1880 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1da177e4
LT		 1881 put_rpccred(cred);
1882 if (IS_ERR(state)) {
1883 status = PTR_ERR(state);
1884 goto out;
1885 }
24ac23ab 1886 d_instantiate(dentry, igrab(state->inode));
1da177e4
LT		 1887 if (flags & O_EXCL) {
1888 struct nfs_fattr fattr;
3e4f6290 1889 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1890 if (status == 0)
65e4308d 1891 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 1892 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 1893 }
ad389da7 1894 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
4a35bd41 1895 status = nfs4_intent_set_file(nd, &path, state);
02a913a7 1896 else
4a35bd41 1897 nfs4_close_state(&path, state, flags);
1da177e4
LT		 1898out:
1899 return status;
1900}
1901
1902static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1903{
16e42959 1904 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 1905 struct nfs_removeargs args = {
1da177e4 1906 .fh = NFS_FH(dir),
4fdc17b2
TM		 1907 .name.len = name->len,
1908 .name.name = name->name,
16e42959
TM		 1909 .bitmask = server->attr_bitmask,
1910 };
4fdc17b2 1911 struct nfs_removeres res = {
16e42959 1912 .server = server,
1da177e4 1913 };
1da177e4 1914 struct rpc_message msg = {
4fdc17b2
TM		 1915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1916 .rpc_argp = &args,
1917 .rpc_resp = &res,
1da177e4
LT		 1918 };
1919 int status;
1920
4fdc17b2 1921 nfs_fattr_init(&res.dir_attr);
16e42959
TM		 1922 status = rpc_call_sync(server->client, &msg, 0);
1923 if (status == 0) {
1924 update_changeattr(dir, &res.cinfo);
4fdc17b2 1925 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 1926 }
1da177e4
LT		 1927 return status;
1928}
1929
1930static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1931{
1932 struct nfs4_exception exception = { };
1933 int err;
1934 do {
1935 err = nfs4_handle_exception(NFS_SERVER(dir),
1936 _nfs4_proc_remove(dir, name),
1937 &exception);
1938 } while (exception.retry);
1939 return err;
1940}
1941
e4eff1a6 1942static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 1943{
e4eff1a6
TM		 1944 struct nfs_server *server = NFS_SERVER(dir);
1945 struct nfs_removeargs *args = msg->rpc_argp;
1946 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 1947
e4eff1a6
TM		 1948 args->bitmask = server->attr_bitmask;
1949 res->server = server;
1da177e4 1950 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 1951}
1952
e4eff1a6 1953static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 1954{
e4eff1a6
TM		 1955 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1956
1957 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1958 return 0;
1959 update_changeattr(dir, &res->cinfo);
1960 nfs_post_op_update_inode(dir, &res->dir_attr);
1961 return 1;
1da177e4
LT		 1962}
1963
1964static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1965 struct inode *new_dir, struct qstr *new_name)
1966{
6caf2c82 1967 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1968 struct nfs4_rename_arg arg = {
1969 .old_dir = NFS_FH(old_dir),
1970 .new_dir = NFS_FH(new_dir),
1971 .old_name = old_name,
1972 .new_name = new_name,
6caf2c82
TM		 1973 .bitmask = server->attr_bitmask,
1974 };
1975 struct nfs_fattr old_fattr, new_fattr;
1976 struct nfs4_rename_res res = {
1977 .server = server,
1978 .old_fattr = &old_fattr,
1979 .new_fattr = &new_fattr,
1da177e4 1980 };
1da177e4
LT		 1981 struct rpc_message msg = {
1982 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1983 .rpc_argp = &arg,
1984 .rpc_resp = &res,
1985 };
1986 int status;
1987
6caf2c82
TM		 1988 nfs_fattr_init(res.old_fattr);
1989 nfs_fattr_init(res.new_fattr);
1990 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 1991
1992 if (!status) {
1993 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 1994 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 1995 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 1996 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 1997 }
1998 return status;
1999}
2000
2001static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2002 struct inode *new_dir, struct qstr *new_name)
2003{
2004 struct nfs4_exception exception = { };
2005 int err;
2006 do {
2007 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2008 _nfs4_proc_rename(old_dir, old_name,
2009 new_dir, new_name),
2010 &exception);
2011 } while (exception.retry);
2012 return err;
2013}
2014
2015static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2016{
91ba2eee 2017 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2018 struct nfs4_link_arg arg = {
2019 .fh = NFS_FH(inode),
2020 .dir_fh = NFS_FH(dir),
2021 .name = name,
91ba2eee
TM		 2022 .bitmask = server->attr_bitmask,
2023 };
2024 struct nfs_fattr fattr, dir_attr;
2025 struct nfs4_link_res res = {
2026 .server = server,
2027 .fattr = &fattr,
2028 .dir_attr = &dir_attr,
1da177e4 2029 };
1da177e4
LT		 2030 struct rpc_message msg = {
2031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2032 .rpc_argp = &arg,
91ba2eee 2033 .rpc_resp = &res,
1da177e4
LT		 2034 };
2035 int status;
2036
91ba2eee
TM		 2037 nfs_fattr_init(res.fattr);
2038 nfs_fattr_init(res.dir_attr);
2039 status = rpc_call_sync(server->client, &msg, 0);
2040 if (!status) {
2041 update_changeattr(dir, &res.cinfo);
2042 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2043 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2044 }
1da177e4
LT		 2045
2046 return status;
2047}
2048
2049static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2050{
2051 struct nfs4_exception exception = { };
2052 int err;
2053 do {
2054 err = nfs4_handle_exception(NFS_SERVER(inode),
2055 _nfs4_proc_link(inode, dir, name),
2056 &exception);
2057 } while (exception.retry);
2058 return err;
2059}
2060
4f390c15 2061static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2062 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2063{
2064 struct nfs_server *server = NFS_SERVER(dir);
4f390c15
CL		 2065 struct nfs_fh fhandle;
2066 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2067 struct nfs4_create_arg arg = {
2068 .dir_fh = NFS_FH(dir),
2069 .server = server,
4f390c15 2070 .name = &dentry->d_name,
1da177e4
LT		 2071 .attrs = sattr,
2072 .ftype = NF4LNK,
2073 .bitmask = server->attr_bitmask,
2074 };
2075 struct nfs4_create_res res = {
2076 .server = server,
4f390c15
CL		 2077 .fh = &fhandle,
2078 .fattr = &fattr,
56ae19f3 2079 .dir_fattr = &dir_fattr,
1da177e4
LT		 2080 };
2081 struct rpc_message msg = {
2082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2083 .rpc_argp = &arg,
2084 .rpc_resp = &res,
2085 };
2086 int status;
2087
94a6d753 2088 if (len > NFS4_MAXPATHLEN)
1da177e4 2089 return -ENAMETOOLONG;
4f390c15 2090
94a6d753
CL		 2091 arg.u.symlink.pages = &page;
2092 arg.u.symlink.len = len;
4f390c15 2093 nfs_fattr_init(&fattr);
56ae19f3 2094 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2095
2096 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
4f390c15 2097 if (!status) {
1da177e4 2098 update_changeattr(dir, &res.dir_cinfo);
4f390c15
CL		 2099 nfs_post_op_update_inode(dir, res.dir_fattr);
2100 status = nfs_instantiate(dentry, &fhandle, &fattr);
2101 }
1da177e4
LT		 2102 return status;
2103}
2104
4f390c15 2105static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2106 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2107{
2108 struct nfs4_exception exception = { };
2109 int err;
2110 do {
2111 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2112 _nfs4_proc_symlink(dir, dentry, page,
2113 len, sattr),
1da177e4
LT		 2114 &exception);
2115 } while (exception.retry);
2116 return err;
2117}
2118
2119static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2120 struct iattr *sattr)
2121{
2122 struct nfs_server *server = NFS_SERVER(dir);
2123 struct nfs_fh fhandle;
56ae19f3 2124 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2125 struct nfs4_create_arg arg = {
2126 .dir_fh = NFS_FH(dir),
2127 .server = server,
2128 .name = &dentry->d_name,
2129 .attrs = sattr,
2130 .ftype = NF4DIR,
2131 .bitmask = server->attr_bitmask,
2132 };
2133 struct nfs4_create_res res = {
2134 .server = server,
2135 .fh = &fhandle,
2136 .fattr = &fattr,
56ae19f3 2137 .dir_fattr = &dir_fattr,
1da177e4
LT		 2138 };
2139 struct rpc_message msg = {
2140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2141 .rpc_argp = &arg,
2142 .rpc_resp = &res,
2143 };
2144 int status;
2145
0e574af1 2146 nfs_fattr_init(&fattr);
56ae19f3 2147 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2148
2149 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2150 if (!status) {
2151 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2152 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2153 status = nfs_instantiate(dentry, &fhandle, &fattr);
2154 }
2155 return status;
2156}
2157
2158static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2159 struct iattr *sattr)
2160{
2161 struct nfs4_exception exception = { };
2162 int err;
2163 do {
2164 err = nfs4_handle_exception(NFS_SERVER(dir),
2165 _nfs4_proc_mkdir(dir, dentry, sattr),
2166 &exception);
2167 } while (exception.retry);
2168 return err;
2169}
2170
2171static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2172 u64 cookie, struct page *page, unsigned int count, int plus)
2173{
2174 struct inode *dir = dentry->d_inode;
2175 struct nfs4_readdir_arg args = {
2176 .fh = NFS_FH(dir),
2177 .pages = &page,
2178 .pgbase = 0,
2179 .count = count,
2180 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2181 };
2182 struct nfs4_readdir_res res;
2183 struct rpc_message msg = {
2184 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2185 .rpc_argp = &args,
2186 .rpc_resp = &res,
2187 .rpc_cred = cred,
2188 };
2189 int status;
2190
eadf4598
TM		 2191 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2192 dentry->d_parent->d_name.name,
2193 dentry->d_name.name,
2194 (unsigned long long)cookie);
1da177e4
LT		 2195 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2196 res.pgbase = args.pgbase;
2197 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2198 if (status == 0)
2199 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
eadf4598 2200 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2201 return status;
2202}
2203
2204static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2205 u64 cookie, struct page *page, unsigned int count, int plus)
2206{
2207 struct nfs4_exception exception = { };
2208 int err;
2209 do {
2210 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2211 _nfs4_proc_readdir(dentry, cred, cookie,
2212 page, count, plus),
2213 &exception);
2214 } while (exception.retry);
2215 return err;
2216}
2217
2218static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2219 struct iattr *sattr, dev_t rdev)
2220{
2221 struct nfs_server *server = NFS_SERVER(dir);
2222 struct nfs_fh fh;
56ae19f3 2223 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2224 struct nfs4_create_arg arg = {
2225 .dir_fh = NFS_FH(dir),
2226 .server = server,
2227 .name = &dentry->d_name,
2228 .attrs = sattr,
2229 .bitmask = server->attr_bitmask,
2230 };
2231 struct nfs4_create_res res = {
2232 .server = server,
2233 .fh = &fh,
2234 .fattr = &fattr,
56ae19f3 2235 .dir_fattr = &dir_fattr,
1da177e4
LT		 2236 };
2237 struct rpc_message msg = {
2238 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2239 .rpc_argp = &arg,
2240 .rpc_resp = &res,
2241 };
2242 int status;
2243 int mode = sattr->ia_mode;
2244
0e574af1 2245 nfs_fattr_init(&fattr);
56ae19f3 2246 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2247
2248 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2249 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2250 if (S_ISFIFO(mode))
2251 arg.ftype = NF4FIFO;
2252 else if (S_ISBLK(mode)) {
2253 arg.ftype = NF4BLK;
2254 arg.u.device.specdata1 = MAJOR(rdev);
2255 arg.u.device.specdata2 = MINOR(rdev);
2256 }
2257 else if (S_ISCHR(mode)) {
2258 arg.ftype = NF4CHR;
2259 arg.u.device.specdata1 = MAJOR(rdev);
2260 arg.u.device.specdata2 = MINOR(rdev);
2261 }
2262 else
2263 arg.ftype = NF4SOCK;
2264
2265 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2266 if (status == 0) {
2267 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2268 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2269 status = nfs_instantiate(dentry, &fh, &fattr);
2270 }
2271 return status;
2272}
2273
2274static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2275 struct iattr *sattr, dev_t rdev)
2276{
2277 struct nfs4_exception exception = { };
2278 int err;
2279 do {
2280 err = nfs4_handle_exception(NFS_SERVER(dir),
2281 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2282 &exception);
2283 } while (exception.retry);
2284 return err;
2285}
2286
2287static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2288 struct nfs_fsstat *fsstat)
2289{
2290 struct nfs4_statfs_arg args = {
2291 .fh = fhandle,
2292 .bitmask = server->attr_bitmask,
2293 };
2294 struct rpc_message msg = {
2295 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2296 .rpc_argp = &args,
2297 .rpc_resp = fsstat,
2298 };
2299
0e574af1 2300 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2301 return rpc_call_sync(server->client, &msg, 0);
2302}
2303
2304static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2305{
2306 struct nfs4_exception exception = { };
2307 int err;
2308 do {
2309 err = nfs4_handle_exception(server,
2310 _nfs4_proc_statfs(server, fhandle, fsstat),
2311 &exception);
2312 } while (exception.retry);
2313 return err;
2314}
2315
2316static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2317 struct nfs_fsinfo *fsinfo)
2318{
2319 struct nfs4_fsinfo_arg args = {
2320 .fh = fhandle,
2321 .bitmask = server->attr_bitmask,
2322 };
2323 struct rpc_message msg = {
2324 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2325 .rpc_argp = &args,
2326 .rpc_resp = fsinfo,
2327 };
2328
2329 return rpc_call_sync(server->client, &msg, 0);
2330}
2331
2332static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2333{
2334 struct nfs4_exception exception = { };
2335 int err;
2336
2337 do {
2338 err = nfs4_handle_exception(server,
2339 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2340 &exception);
2341 } while (exception.retry);
2342 return err;
2343}
2344
2345static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2346{
0e574af1 2347 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2348 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2349}
2350
2351static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2352 struct nfs_pathconf *pathconf)
2353{
2354 struct nfs4_pathconf_arg args = {
2355 .fh = fhandle,
2356 .bitmask = server->attr_bitmask,
2357 };
2358 struct rpc_message msg = {
2359 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2360 .rpc_argp = &args,
2361 .rpc_resp = pathconf,
2362 };
2363
2364 /* None of the pathconf attributes are mandatory to implement */
2365 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2366 memset(pathconf, 0, sizeof(*pathconf));
2367 return 0;
2368 }
2369
0e574af1 2370 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2371 return rpc_call_sync(server->client, &msg, 0);
2372}
2373
2374static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2375 struct nfs_pathconf *pathconf)
2376{
2377 struct nfs4_exception exception = { };
2378 int err;
2379
2380 do {
2381 err = nfs4_handle_exception(server,
2382 _nfs4_proc_pathconf(server, fhandle, pathconf),
2383 &exception);
2384 } while (exception.retry);
2385 return err;
2386}
2387
ec06c096 2388static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2389{
ec06c096 2390 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2391
ec06c096 2392 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2393 rpc_restart_call(task);
ec06c096 2394 return -EAGAIN;
1da177e4
LT		 2395 }
2396 if (task->tk_status > 0)
ec06c096
TM		 2397 renew_lease(server, data->timestamp);
2398 return 0;
1da177e4
LT		 2399}
2400
ec06c096 2401static void nfs4_proc_read_setup(struct nfs_read_data *data)
1da177e4 2402{
1da177e4
LT		 2403 struct rpc_message msg = {
2404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2405 .rpc_argp = &data->args,
2406 .rpc_resp = &data->res,
2407 .rpc_cred = data->cred,
2408 };
1da177e4
LT		 2409
2410 data->timestamp = jiffies;
2411
ec06c096 2412 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2413}
2414
788e7a89 2415static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2416{
1da177e4
LT		 2417 struct inode *inode = data->inode;
2418
2419 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2420 rpc_restart_call(task);
788e7a89 2421 return -EAGAIN;
1da177e4 2422 }
4f9838c7 2423 if (task->tk_status >= 0) {
1da177e4 2424 renew_lease(NFS_SERVER(inode), data->timestamp);
4f9838c7
TM		 2425 nfs_post_op_update_inode(inode, data->res.fattr);
2426 }
788e7a89 2427 return 0;
1da177e4
LT		 2428}
2429
788e7a89 2430static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1da177e4 2431{
1da177e4
LT		 2432 struct rpc_message msg = {
2433 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2434 .rpc_argp = &data->args,
2435 .rpc_resp = &data->res,
2436 .rpc_cred = data->cred,
2437 };
2438 struct inode *inode = data->inode;
4f9838c7 2439 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2440 int stable;
1da177e4
LT		 2441
2442 if (how & FLUSH_STABLE) {
2443 if (!NFS_I(inode)->ncommit)
2444 stable = NFS_FILE_SYNC;
2445 else
2446 stable = NFS_DATA_SYNC;
2447 } else
2448 stable = NFS_UNSTABLE;
2449 data->args.stable = stable;
4f9838c7
TM		 2450 data->args.bitmask = server->attr_bitmask;
2451 data->res.server = server;
1da177e4
LT		 2452
2453 data->timestamp = jiffies;
2454
1da177e4 2455 /* Finalize the task. */
788e7a89 2456 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2457}
2458
788e7a89 2459static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2460{
1da177e4
LT		 2461 struct inode *inode = data->inode;
2462
2463 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2464 rpc_restart_call(task);
788e7a89 2465 return -EAGAIN;
1da177e4 2466 }
4f9838c7
TM		 2467 if (task->tk_status >= 0)
2468 nfs_post_op_update_inode(inode, data->res.fattr);
788e7a89 2469 return 0;
1da177e4
LT		 2470}
2471
788e7a89 2472static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1da177e4 2473{
1da177e4
LT		 2474 struct rpc_message msg = {
2475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2476 .rpc_argp = &data->args,
2477 .rpc_resp = &data->res,
2478 .rpc_cred = data->cred,
2479 };
788e7a89 2480 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2481
4f9838c7
TM		 2482 data->args.bitmask = server->attr_bitmask;
2483 data->res.server = server;
2484
788e7a89 2485 rpc_call_setup(&data->task, &msg, 0);
1da177e4
LT		 2486}
2487
2488/*
2489 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2490 * standalone procedure for queueing an asynchronous RENEW.
2491 */
963d8fe5 2492static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2493{
adfa6f98 2494 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2495 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2496
2497 if (task->tk_status < 0) {
2498 switch (task->tk_status) {
2499 case -NFS4ERR_STALE_CLIENTID:
2500 case -NFS4ERR_EXPIRED:
2501 case -NFS4ERR_CB_PATH_DOWN:
2502 nfs4_schedule_state_recovery(clp);
2503 }
2504 return;
2505 }
2506 spin_lock(&clp->cl_lock);
2507 if (time_before(clp->cl_last_renewal,timestamp))
2508 clp->cl_last_renewal = timestamp;
2509 spin_unlock(&clp->cl_lock);
2510}
2511
963d8fe5
TM		 2512static const struct rpc_call_ops nfs4_renew_ops = {
2513 .rpc_call_done = nfs4_renew_done,
2514};
2515
adfa6f98 2516int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2517{
2518 struct rpc_message msg = {
2519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2520 .rpc_argp = clp,
b4454fe1 2521 .rpc_cred = cred,
1da177e4
LT		 2522 };
2523
2524 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2525 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2526}
2527
adfa6f98 2528int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2529{
2530 struct rpc_message msg = {
2531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2532 .rpc_argp = clp,
b4454fe1 2533 .rpc_cred = cred,
1da177e4
LT		 2534 };
2535 unsigned long now = jiffies;
2536 int status;
2537
2538 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2539 if (status < 0)
2540 return status;
2541 spin_lock(&clp->cl_lock);
2542 if (time_before(clp->cl_last_renewal,now))
2543 clp->cl_last_renewal = now;
2544 spin_unlock(&clp->cl_lock);
2545 return 0;
2546}
2547
aa1870af
BF		 2548static inline int nfs4_server_supports_acls(struct nfs_server *server)
2549{
2550 return (server->caps & NFS_CAP_ACLS)
2551 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2552 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2553}
2554
2555/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2556 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2557 * the stack.
2558 */
2559#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2560
2561static void buf_to_pages(const void *buf, size_t buflen,
2562 struct page **pages, unsigned int *pgbase)
2563{
2564 const void *p = buf;
2565
2566 *pgbase = offset_in_page(buf);
2567 p -= *pgbase;
2568 while (p < buf + buflen) {
2569 *(pages++) = virt_to_page(p);
2570 p += PAGE_CACHE_SIZE;
2571 }
2572}
2573
e50a1c2e
BF		 2574struct nfs4_cached_acl {
2575 int cached;
2576 size_t len;
3e9d4154 2577 char data[0];
e50a1c2e
BF		 2578};
2579
2580static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2581{
2582 struct nfs_inode *nfsi = NFS_I(inode);
2583
2584 spin_lock(&inode->i_lock);
2585 kfree(nfsi->nfs4_acl);
2586 nfsi->nfs4_acl = acl;
2587 spin_unlock(&inode->i_lock);
2588}
2589
2590static void nfs4_zap_acl_attr(struct inode *inode)
2591{
2592 nfs4_set_cached_acl(inode, NULL);
2593}
2594
2595static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2596{
2597 struct nfs_inode *nfsi = NFS_I(inode);
2598 struct nfs4_cached_acl *acl;
2599 int ret = -ENOENT;
2600
2601 spin_lock(&inode->i_lock);
2602 acl = nfsi->nfs4_acl;
2603 if (acl == NULL)
2604 goto out;
2605 if (buf == NULL) /* user is just asking for length */
2606 goto out_len;
2607 if (acl->cached == 0)
2608 goto out;
2609 ret = -ERANGE; /* see getxattr(2) man page */
2610 if (acl->len > buflen)
2611 goto out;
2612 memcpy(buf, acl->data, acl->len);
2613out_len:
2614 ret = acl->len;
2615out:
2616 spin_unlock(&inode->i_lock);
2617 return ret;
2618}
2619
2620static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2621{
2622 struct nfs4_cached_acl *acl;
2623
2624 if (buf && acl_len <= PAGE_SIZE) {
2625 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2626 if (acl == NULL)
2627 goto out;
2628 acl->cached = 1;
2629 memcpy(acl->data, buf, acl_len);
2630 } else {
2631 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2632 if (acl == NULL)
2633 goto out;
2634 acl->cached = 0;
2635 }
2636 acl->len = acl_len;
2637out:
2638 nfs4_set_cached_acl(inode, acl);
2639}
2640
16b4289c 2641static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2642{
aa1870af
BF		 2643 struct page *pages[NFS4ACL_MAXPAGES];
2644 struct nfs_getaclargs args = {
2645 .fh = NFS_FH(inode),
2646 .acl_pages = pages,
2647 .acl_len = buflen,
2648 };
2649 size_t resp_len = buflen;
e50a1c2e 2650 void *resp_buf;
aa1870af
BF		 2651 struct rpc_message msg = {
2652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2653 .rpc_argp = &args,
2654 .rpc_resp = &resp_len,
2655 };
e50a1c2e 2656 struct page *localpage = NULL;
aa1870af
BF		 2657 int ret;
2658
e50a1c2e
BF		 2659 if (buflen < PAGE_SIZE) {
2660 /* As long as we're doing a round trip to the server anyway,
2661 * let's be prepared for a page of acl data. */
2662 localpage = alloc_page(GFP_KERNEL);
2663 resp_buf = page_address(localpage);
2664 if (localpage == NULL)
2665 return -ENOMEM;
2666 args.acl_pages[0] = localpage;
2667 args.acl_pgbase = 0;
1d95db8e 2668 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2669 } else {
2670 resp_buf = buf;
2671 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2672 }
aa1870af 2673 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2674 if (ret)
2675 goto out_free;
2676 if (resp_len > args.acl_len)
2677 nfs4_write_cached_acl(inode, NULL, resp_len);
2678 else
2679 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2680 if (buf) {
2681 ret = -ERANGE;
2682 if (resp_len > buflen)
2683 goto out_free;
2684 if (localpage)
2685 memcpy(buf, resp_buf, resp_len);
2686 }
2687 ret = resp_len;
2688out_free:
2689 if (localpage)
2690 __free_page(localpage);
aa1870af
BF		 2691 return ret;
2692}
2693
16b4289c
TM		 2694static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2695{
2696 struct nfs4_exception exception = { };
2697 ssize_t ret;
2698 do {
2699 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2700 if (ret >= 0)
2701 break;
2702 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2703 } while (exception.retry);
2704 return ret;
2705}
2706
e50a1c2e
BF		 2707static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2708{
2709 struct nfs_server *server = NFS_SERVER(inode);
2710 int ret;
2711
2712 if (!nfs4_server_supports_acls(server))
2713 return -EOPNOTSUPP;
2714 ret = nfs_revalidate_inode(server, inode);
2715 if (ret < 0)
2716 return ret;
2717 ret = nfs4_read_cached_acl(inode, buf, buflen);
2718 if (ret != -ENOENT)
2719 return ret;
2720 return nfs4_get_acl_uncached(inode, buf, buflen);
2721}
2722
16b4289c 2723static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2724{
2725 struct nfs_server *server = NFS_SERVER(inode);
2726 struct page *pages[NFS4ACL_MAXPAGES];
2727 struct nfs_setaclargs arg = {
2728 .fh = NFS_FH(inode),
2729 .acl_pages = pages,
2730 .acl_len = buflen,
2731 };
2732 struct rpc_message msg = {
2733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2734 .rpc_argp = &arg,
2735 .rpc_resp = NULL,
2736 };
2737 int ret;
2738
2739 if (!nfs4_server_supports_acls(server))
2740 return -EOPNOTSUPP;
642ac549 2741 nfs_inode_return_delegation(inode);
4b580ee3 2742 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2743 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
08efa202 2744 nfs_zap_caches(inode);
4b580ee3
BF		 2745 return ret;
2746}
2747
16b4289c
TM		 2748static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2749{
2750 struct nfs4_exception exception = { };
2751 int err;
2752 do {
2753 err = nfs4_handle_exception(NFS_SERVER(inode),
2754 __nfs4_proc_set_acl(inode, buf, buflen),
2755 &exception);
2756 } while (exception.retry);
2757 return err;
2758}
2759
1da177e4 2760static int
faf5f49c 2761nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2762{
7539bbab 2763 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2764
2765 if (!clp || task->tk_status >= 0)
2766 return 0;
2767 switch(task->tk_status) {
2768 case -NFS4ERR_STALE_CLIENTID:
2769 case -NFS4ERR_STALE_STATEID:
2770 case -NFS4ERR_EXPIRED:
2771 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2772 nfs4_schedule_state_recovery(clp);
433fbe4c 2773 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2774 rpc_wake_up_task(task);
2775 task->tk_status = 0;
2776 return -EAGAIN;
1da177e4 2777 case -NFS4ERR_DELAY:
006ea73e
CL		 2778 nfs_inc_server_stats((struct nfs_server *) server,
2779 NFSIOS_DELAY);
2780 case -NFS4ERR_GRACE:
1da177e4
LT		 2781 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2782 task->tk_status = 0;
2783 return -EAGAIN;
2784 case -NFS4ERR_OLD_STATEID:
2785 task->tk_status = 0;
2786 return -EAGAIN;
2787 }
2788 task->tk_status = nfs4_map_errors(task->tk_status);
2789 return 0;
2790}
2791
433fbe4c
TM		 2792static int nfs4_wait_bit_interruptible(void *word)
2793{
2794 if (signal_pending(current))
2795 return -ERESTARTSYS;
2796 schedule();
2797 return 0;
2798}
2799
adfa6f98 2800static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2801{
1da177e4 2802 sigset_t oldset;
433fbe4c 2803 int res;
1da177e4
LT		 2804
2805 might_sleep();
2806
e148582e
TM		 2807 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2808
1da177e4 2809 rpc_clnt_sigmask(clnt, &oldset);
433fbe4c
TM		 2810 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2811 nfs4_wait_bit_interruptible,
2812 TASK_INTERRUPTIBLE);
1da177e4 2813 rpc_clnt_sigunmask(clnt, &oldset);
e148582e
TM		 2814
2815 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT		 2816 return res;
2817}
2818
2819static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2820{
2821 sigset_t oldset;
2822 int res = 0;
2823
2824 might_sleep();
2825
2826 if (*timeout <= 0)
2827 *timeout = NFS4_POLL_RETRY_MIN;
2828 if (*timeout > NFS4_POLL_RETRY_MAX)
2829 *timeout = NFS4_POLL_RETRY_MAX;
2830 rpc_clnt_sigmask(clnt, &oldset);
2831 if (clnt->cl_intr) {
041e0e3b 2832 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2833 if (signalled())
2834 res = -ERESTARTSYS;
041e0e3b
NA		 2835 } else
2836 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2837 rpc_clnt_sigunmask(clnt, &oldset);
2838 *timeout <<= 1;
2839 return res;
2840}
2841
2842/* This is the error handling routine for processes that are allowed
2843 * to sleep.
2844 */
10afec90 2845static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2846{
7539bbab 2847 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2848 int ret = errorcode;
2849
2850 exception->retry = 0;
2851 switch(errorcode) {
2852 case 0:
2853 return 0;
2854 case -NFS4ERR_STALE_CLIENTID:
2855 case -NFS4ERR_STALE_STATEID:
2856 case -NFS4ERR_EXPIRED:
433fbe4c 2857 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2858 ret = nfs4_wait_clnt_recover(server->client, clp);
2859 if (ret == 0)
2860 exception->retry = 1;
2861 break;
c514983d 2862 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2863 case -NFS4ERR_GRACE:
2864 case -NFS4ERR_DELAY:
2865 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2866 if (ret != 0)
2867 break;
1da177e4 2868 case -NFS4ERR_OLD_STATEID:
2c56617d 2869 exception->retry = 1;
1da177e4
LT		 2870 }
2871 /* We failed to handle the error */
2872 return nfs4_map_errors(ret);
2873}
2874
adfa6f98 2875int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2876{
2877 nfs4_verifier sc_verifier;
2878 struct nfs4_setclientid setclientid = {
2879 .sc_verifier = &sc_verifier,
2880 .sc_prog = program,
2881 };
2882 struct rpc_message msg = {
2883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2884 .rpc_argp = &setclientid,
2885 .rpc_resp = clp,
286d7d6a 2886 .rpc_cred = cred,
1da177e4 2887 };
bc4785cd 2888 __be32 *p;
1da177e4
LT		 2889 int loop = 0;
2890 int status;
2891
bc4785cd 2892 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2893 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2894 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2895
2896 for(;;) {
2897 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2898 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
24c8dbbb 2899 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
286d7d6a 2900 cred->cr_ops->cr_name,
1da177e4
LT		 2901 clp->cl_id_uniquifier);
2902 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2903 sizeof(setclientid.sc_netid), "tcp");
2904 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2905 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2906 clp->cl_ipaddr, port >> 8, port & 255);
2907
2908 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2909 if (status != -NFS4ERR_CLID_INUSE)
2910 break;
2911 if (signalled())
2912 break;
2913 if (loop++ & 1)
2914 ssleep(clp->cl_lease_time + 1);
2915 else
2916 if (++clp->cl_id_uniquifier == 0)
2917 break;
2918 }
2919 return status;
2920}
2921
adfa6f98 2922static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2923{
2924 struct nfs_fsinfo fsinfo;
2925 struct rpc_message msg = {
2926 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2927 .rpc_argp = clp,
2928 .rpc_resp = &fsinfo,
286d7d6a 2929 .rpc_cred = cred,
1da177e4
LT		 2930 };
2931 unsigned long now;
2932 int status;
2933
2934 now = jiffies;
2935 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2936 if (status == 0) {
2937 spin_lock(&clp->cl_lock);
2938 clp->cl_lease_time = fsinfo.lease_time * HZ;
2939 clp->cl_last_renewal = now;
58d9714a 2940 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2941 spin_unlock(&clp->cl_lock);
2942 }
2943 return status;
2944}
2945
adfa6f98 2946int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM		 2947{
2948 long timeout;
2949 int err;
2950 do {
2951 err = _nfs4_proc_setclientid_confirm(clp, cred);
2952 switch (err) {
2953 case 0:
2954 return err;
2955 case -NFS4ERR_RESOURCE:
2956 /* The IBM lawyers misread another document! */
2957 case -NFS4ERR_DELAY:
2958 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2959 }
2960 } while (err == 0);
2961 return err;
2962}
2963
fe650407
TM		 2964struct nfs4_delegreturndata {
2965 struct nfs4_delegreturnargs args;
fa178f29 2966 struct nfs4_delegreturnres res;
fe650407
TM		 2967 struct nfs_fh fh;
2968 nfs4_stateid stateid;
2969 struct rpc_cred *cred;
26e976a8 2970 unsigned long timestamp;
fa178f29 2971 struct nfs_fattr fattr;
fe650407
TM		 2972 int rpc_status;
2973};
2974
2975static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
1da177e4 2976{
fe650407 2977 struct nfs4_delegreturndata *data = calldata;
1da177e4
LT		 2978 struct rpc_message msg = {
2979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
fe650407 2980 .rpc_argp = &data->args,
fa178f29 2981 .rpc_resp = &data->res,
fe650407 2982 .rpc_cred = data->cred,
1da177e4 2983 };
fa178f29 2984 nfs_fattr_init(data->res.fattr);
fe650407
TM		 2985 rpc_call_setup(task, &msg, 0);
2986}
1da177e4 2987
fe650407
TM		 2988static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2989{
2990 struct nfs4_delegreturndata *data = calldata;
2991 data->rpc_status = task->tk_status;
26e976a8 2992 if (data->rpc_status == 0)
fa178f29 2993 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 2994}
2995
2996static void nfs4_delegreturn_release(void *calldata)
2997{
2998 struct nfs4_delegreturndata *data = calldata;
2999
3000 put_rpccred(data->cred);
3001 kfree(calldata);
3002}
3003
c8d149f3 3004static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3005 .rpc_call_prepare = nfs4_delegreturn_prepare,
3006 .rpc_call_done = nfs4_delegreturn_done,
3007 .rpc_release = nfs4_delegreturn_release,
3008};
3009
3010static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3011{
3012 struct nfs4_delegreturndata *data;
fa178f29 3013 struct nfs_server *server = NFS_SERVER(inode);
fe650407
TM		 3014 struct rpc_task *task;
3015 int status;
3016
3017 data = kmalloc(sizeof(*data), GFP_KERNEL);
3018 if (data == NULL)
3019 return -ENOMEM;
3020 data->args.fhandle = &data->fh;
3021 data->args.stateid = &data->stateid;
fa178f29 3022 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3023 nfs_copy_fh(&data->fh, NFS_FH(inode));
3024 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3025 data->res.fattr = &data->fattr;
3026 data->res.server = server;
fe650407 3027 data->cred = get_rpccred(cred);
26e976a8 3028 data->timestamp = jiffies;
fe650407
TM		 3029 data->rpc_status = 0;
3030
3031 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
7a1218a2 3032 if (IS_ERR(task))
fe650407 3033 return PTR_ERR(task);
fe650407 3034 status = nfs4_wait_for_completion_rpc_task(task);
fa178f29 3035 if (status == 0) {
fe650407 3036 status = data->rpc_status;
fa178f29
TM		 3037 if (status == 0)
3038 nfs_post_op_update_inode(inode, &data->fattr);
3039 }
e6b3c4db 3040 rpc_put_task(task);
fe650407 3041 return status;
1da177e4
LT		 3042}
3043
3044int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3045{
3046 struct nfs_server *server = NFS_SERVER(inode);
3047 struct nfs4_exception exception = { };
3048 int err;
3049 do {
3050 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3051 switch (err) {
3052 case -NFS4ERR_STALE_STATEID:
3053 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3054 case 0:
3055 return 0;
3056 }
3057 err = nfs4_handle_exception(server, err, &exception);
3058 } while (exception.retry);
3059 return err;
3060}
3061
3062#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3063#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3064
3065/*
3066 * sleep, with exponential backoff, and retry the LOCK operation.
3067 */
3068static unsigned long
3069nfs4_set_lock_task_retry(unsigned long timeout)
3070{
041e0e3b 3071 schedule_timeout_interruptible(timeout);
1da177e4
LT		 3072 timeout <<= 1;
3073 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3074 return NFS4_LOCK_MAXTIMEOUT;
3075 return timeout;
3076}
3077
1da177e4
LT		 3078static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3079{
3080 struct inode *inode = state->inode;
3081 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3082 struct nfs_client *clp = server->nfs_client;
911d1aaf 3083 struct nfs_lockt_args arg = {
1da177e4 3084 .fh = NFS_FH(inode),
911d1aaf 3085 .fl = request,
1da177e4 3086 };
911d1aaf
TM		 3087 struct nfs_lockt_res res = {
3088 .denied = request,
1da177e4
LT		 3089 };
3090 struct rpc_message msg = {
3091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3092 .rpc_argp = &arg,
3093 .rpc_resp = &res,
3094 .rpc_cred = state->owner->so_cred,
3095 };
1da177e4
LT		 3096 struct nfs4_lock_state *lsp;
3097 int status;
3098
3099 down_read(&clp->cl_sem);
911d1aaf 3100 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3101 status = nfs4_set_lock_state(state, request);
3102 if (status != 0)
3103 goto out;
3104 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3105 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3106 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3107 switch (status) {
3108 case 0:
3109 request->fl_type = F_UNLCK;
3110 break;
3111 case -NFS4ERR_DENIED:
3112 status = 0;
1da177e4 3113 }
70cc6487 3114 request->fl_ops->fl_release_private(request);
8d0a8a9d 3115out:
1da177e4
LT		 3116 up_read(&clp->cl_sem);
3117 return status;
3118}
3119
3120static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3121{
3122 struct nfs4_exception exception = { };
3123 int err;
3124
3125 do {
3126 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3127 _nfs4_proc_getlk(state, cmd, request),
3128 &exception);
3129 } while (exception.retry);
3130 return err;
3131}
3132
3133static int do_vfs_lock(struct file *file, struct file_lock *fl)
3134{
3135 int res = 0;
3136 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3137 case FL_POSIX:
3138 res = posix_lock_file_wait(file, fl);
3139 break;
3140 case FL_FLOCK:
3141 res = flock_lock_file_wait(file, fl);
3142 break;
3143 default:
3144 BUG();
3145 }
1da177e4
LT		 3146 return res;
3147}
3148
faf5f49c 3149struct nfs4_unlockdata {
911d1aaf
TM		 3150 struct nfs_locku_args arg;
3151 struct nfs_locku_res res;
faf5f49c
TM		 3152 struct nfs4_lock_state *lsp;
3153 struct nfs_open_context *ctx;
911d1aaf
TM		 3154 struct file_lock fl;
3155 const struct nfs_server *server;
26e976a8 3156 unsigned long timestamp;
faf5f49c
TM		 3157};
3158
911d1aaf
TM		 3159static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3160 struct nfs_open_context *ctx,
3161 struct nfs4_lock_state *lsp,
3162 struct nfs_seqid *seqid)
3163{
3164 struct nfs4_unlockdata *p;
3165 struct inode *inode = lsp->ls_state->inode;
3166
3167 p = kmalloc(sizeof(*p), GFP_KERNEL);
3168 if (p == NULL)
3169 return NULL;
3170 p->arg.fh = NFS_FH(inode);
3171 p->arg.fl = &p->fl;
3172 p->arg.seqid = seqid;
3173 p->arg.stateid = &lsp->ls_stateid;
3174 p->lsp = lsp;
3175 atomic_inc(&lsp->ls_count);
3176 /* Ensure we don't close file until we're done freeing locks! */
3177 p->ctx = get_nfs_open_context(ctx);
3178 memcpy(&p->fl, fl, sizeof(p->fl));
3179 p->server = NFS_SERVER(inode);
3180 return p;
3181}
3182
06f814a3 3183static void nfs4_locku_release_calldata(void *data)
faf5f49c 3184{
963d8fe5 3185 struct nfs4_unlockdata *calldata = data;
911d1aaf 3186 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3187 nfs4_put_lock_state(calldata->lsp);
3188 put_nfs_open_context(calldata->ctx);
3189 kfree(calldata);
faf5f49c
TM		 3190}
3191
963d8fe5 3192static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3193{
963d8fe5 3194 struct nfs4_unlockdata *calldata = data;
faf5f49c 3195
06f814a3
TM		 3196 if (RPC_ASSASSINATED(task))
3197 return;
911d1aaf 3198 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3199 switch (task->tk_status) {
3200 case 0:
3201 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3202 calldata->res.stateid.data,
faf5f49c 3203 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3204 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3205 break;
3206 case -NFS4ERR_STALE_STATEID:
3207 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3208 break;
3209 default:
a6a352e9 3210 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
faf5f49c 3211 rpc_restart_call(task);
faf5f49c 3212 }
faf5f49c
TM		 3213}
3214
4ce70ada 3215static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3216{
4ce70ada 3217 struct nfs4_unlockdata *calldata = data;
1da177e4
LT		 3218 struct rpc_message msg = {
3219 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
faf5f49c
TM		 3220 .rpc_argp = &calldata->arg,
3221 .rpc_resp = &calldata->res,
3222 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
1da177e4 3223 };
faf5f49c 3224
911d1aaf 3225 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3226 return;
3227 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3228 /* Note: exit _without_ running nfs4_locku_done */
3229 task->tk_action = NULL;
faf5f49c
TM		 3230 return;
3231 }
26e976a8 3232 calldata->timestamp = jiffies;
faf5f49c
TM		 3233 rpc_call_setup(task, &msg, 0);
3234}
3235
963d8fe5 3236static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3237 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3238 .rpc_call_done = nfs4_locku_done,
06f814a3 3239 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3240};
3241
a5d16a4d
TM		 3242static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3243 struct nfs_open_context *ctx,
3244 struct nfs4_lock_state *lsp,
3245 struct nfs_seqid *seqid)
3246{
3247 struct nfs4_unlockdata *data;
a5d16a4d 3248
137d6aca
FF		 3249 /* Ensure this is an unlock - when canceling a lock, the
3250 * canceled lock is passed in, and it won't be an unlock.
3251 */
3252 fl->fl_type = F_UNLCK;
3253
a5d16a4d
TM		 3254 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3255 if (data == NULL) {
3256 nfs_free_seqid(seqid);
3257 return ERR_PTR(-ENOMEM);
3258 }
3259
7a1218a2 3260 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
a5d16a4d
TM		 3261}
3262
faf5f49c
TM		 3263static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3264{
911d1aaf 3265 struct nfs_seqid *seqid;
1da177e4 3266 struct nfs4_lock_state *lsp;
06f814a3
TM		 3267 struct rpc_task *task;
3268 int status = 0;
faf5f49c 3269
8d0a8a9d 3270 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3271 /* Unlock _before_ we do the RPC call */
3272 request->fl_flags |= FL_EXISTS;
3273 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3274 goto out;
8d0a8a9d 3275 if (status != 0)
9b073574
TM		 3276 goto out;
3277 /* Is this a delegated lock? */
3278 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3279 goto out;
8d0a8a9d 3280 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3281 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3282 status = -ENOMEM;
911d1aaf 3283 if (seqid == NULL)
9b073574 3284 goto out;
cd3758e3 3285 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3286 status = PTR_ERR(task);
3287 if (IS_ERR(task))
9b073574 3288 goto out;
a5d16a4d 3289 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3290 rpc_put_task(task);
9b073574 3291out:
1da177e4
LT		 3292 return status;
3293}
3294
a5d16a4d
TM		 3295struct nfs4_lockdata {
3296 struct nfs_lock_args arg;
3297 struct nfs_lock_res res;
3298 struct nfs4_lock_state *lsp;
3299 struct nfs_open_context *ctx;
3300 struct file_lock fl;
26e976a8 3301 unsigned long timestamp;
a5d16a4d
TM		 3302 int rpc_status;
3303 int cancelled;
3304};
3305
3306static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3307 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3308{
a5d16a4d
TM		 3309 struct nfs4_lockdata *p;
3310 struct inode *inode = lsp->ls_state->inode;
1da177e4 3311 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3312
3313 p = kzalloc(sizeof(*p), GFP_KERNEL);
3314 if (p == NULL)
3315 return NULL;
3316
3317 p->arg.fh = NFS_FH(inode);
3318 p->arg.fl = &p->fl;
3319 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3320 if (p->arg.lock_seqid == NULL)
3321 goto out_free;
3322 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3323 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3324 p->arg.lock_owner.id = lsp->ls_id.id;
a5d16a4d
TM		 3325 p->lsp = lsp;
3326 atomic_inc(&lsp->ls_count);
3327 p->ctx = get_nfs_open_context(ctx);
3328 memcpy(&p->fl, fl, sizeof(p->fl));
3329 return p;
3330out_free:
3331 kfree(p);
3332 return NULL;
3333}
3334
3335static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3336{
3337 struct nfs4_lockdata *data = calldata;
3338 struct nfs4_state *state = data->lsp->ls_state;
3339 struct nfs4_state_owner *sp = state->owner;
1da177e4 3340 struct rpc_message msg = {
a5d16a4d
TM		 3341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3342 .rpc_argp = &data->arg,
3343 .rpc_resp = &data->res,
3344 .rpc_cred = sp->so_cred,
1da177e4 3345 };
06735b34 3346
a5d16a4d
TM		 3347 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3348 return;
3349 dprintk("%s: begin!\n", __FUNCTION__);
3350 /* Do we need to do an open_to_lock_owner? */
3351 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3352 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3353 if (data->arg.open_seqid == NULL) {
3354 data->rpc_status = -ENOMEM;
3355 task->tk_action = NULL;
06735b34 3356 goto out;
8d0a8a9d 3357 }
a5d16a4d
TM		 3358 data->arg.open_stateid = &state->stateid;
3359 data->arg.new_lock_owner = 1;
3360 }
26e976a8 3361 data->timestamp = jiffies;
a5d16a4d 3362 rpc_call_setup(task, &msg, 0);
06735b34 3363out:
a5d16a4d
TM		 3364 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3365}
3366
3367static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3368{
3369 struct nfs4_lockdata *data = calldata;
3370
3371 dprintk("%s: begin!\n", __FUNCTION__);
3372
3373 data->rpc_status = task->tk_status;
3374 if (RPC_ASSASSINATED(task))
3375 goto out;
3376 if (data->arg.new_lock_owner != 0) {
3377 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3378 if (data->rpc_status == 0)
3379 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3380 else
3381 goto out;
3382 }
3383 if (data->rpc_status == 0) {
3384 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3385 sizeof(data->lsp->ls_stateid.data));
3386 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3387 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3388 }
3389 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3390out:
3391 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3392}
3393
3394static void nfs4_lock_release(void *calldata)
3395{
3396 struct nfs4_lockdata *data = calldata;
3397
3398 dprintk("%s: begin!\n", __FUNCTION__);
3399 if (data->arg.open_seqid != NULL)
3400 nfs_free_seqid(data->arg.open_seqid);
3401 if (data->cancelled != 0) {
3402 struct rpc_task *task;
3403 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3404 data->arg.lock_seqid);
3405 if (!IS_ERR(task))
e6b3c4db 3406 rpc_put_task(task);
a5d16a4d
TM		 3407 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3408 } else
3409 nfs_free_seqid(data->arg.lock_seqid);
3410 nfs4_put_lock_state(data->lsp);
3411 put_nfs_open_context(data->ctx);
3412 kfree(data);
3413 dprintk("%s: done!\n", __FUNCTION__);
3414}
3415
3416static const struct rpc_call_ops nfs4_lock_ops = {
3417 .rpc_call_prepare = nfs4_lock_prepare,
3418 .rpc_call_done = nfs4_lock_done,
3419 .rpc_release = nfs4_lock_release,
3420};
3421
3422static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3423{
3424 struct nfs4_lockdata *data;
3425 struct rpc_task *task;
3426 int ret;
3427
3428 dprintk("%s: begin!\n", __FUNCTION__);
cd3758e3 3429 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3430 fl->fl_u.nfs4_fl.owner);
3431 if (data == NULL)
3432 return -ENOMEM;
3433 if (IS_SETLKW(cmd))
3434 data->arg.block = 1;
3435 if (reclaim != 0)
3436 data->arg.reclaim = 1;
3437 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3438 &nfs4_lock_ops, data);
7a1218a2 3439 if (IS_ERR(task))
a5d16a4d 3440 return PTR_ERR(task);
a5d16a4d
TM		 3441 ret = nfs4_wait_for_completion_rpc_task(task);
3442 if (ret == 0) {
3443 ret = data->rpc_status;
3444 if (ret == -NFS4ERR_DENIED)
3445 ret = -EAGAIN;
3446 } else
3447 data->cancelled = 1;
e6b3c4db 3448 rpc_put_task(task);
a5d16a4d
TM		 3449 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3450 return ret;
1da177e4
LT		 3451}
3452
3453static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3454{
202b50dc
TM		 3455 struct nfs_server *server = NFS_SERVER(state->inode);
3456 struct nfs4_exception exception = { };
3457 int err;
3458
3459 do {
42a2d13e
TM		 3460 /* Cache the lock if possible... */
3461 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3462 return 0;
202b50dc
TM		 3463 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3464 if (err != -NFS4ERR_DELAY)
3465 break;
3466 nfs4_handle_exception(server, err, &exception);
3467 } while (exception.retry);
3468 return err;
1da177e4
LT		 3469}
3470
3471static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3472{
202b50dc
TM		 3473 struct nfs_server *server = NFS_SERVER(state->inode);
3474 struct nfs4_exception exception = { };
3475 int err;
3476
6bfc93ef
TM		 3477 err = nfs4_set_lock_state(state, request);
3478 if (err != 0)
3479 return err;
202b50dc 3480 do {
42a2d13e
TM		 3481 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3482 return 0;
202b50dc
TM		 3483 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3484 if (err != -NFS4ERR_DELAY)
3485 break;
3486 nfs4_handle_exception(server, err, &exception);
3487 } while (exception.retry);
3488 return err;
1da177e4
LT		 3489}
3490
3491static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3492{
adfa6f98 3493 struct nfs_client *clp = state->owner->so_client;
01c3b861 3494 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3495 int status;
3496
6bfc93ef 3497 /* Is this a delegated open? */
6bfc93ef
TM		 3498 status = nfs4_set_lock_state(state, request);
3499 if (status != 0)
3500 goto out;
01c3b861
TM		 3501 request->fl_flags |= FL_ACCESS;
3502 status = do_vfs_lock(request->fl_file, request);
3503 if (status < 0)
3504 goto out;
3505 down_read(&clp->cl_sem);
3506 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3507 struct nfs_inode *nfsi = NFS_I(state->inode);
3508 /* Yes: cache locks! */
3509 down_read(&nfsi->rwsem);
3510 /* ...but avoid races with delegation recall... */
3511 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3512 request->fl_flags = fl_flags & ~FL_SLEEP;
3513 status = do_vfs_lock(request->fl_file, request);
3514 up_read(&nfsi->rwsem);
3515 goto out_unlock;
3516 }
3517 up_read(&nfsi->rwsem);
3518 }
6bfc93ef
TM		 3519 status = _nfs4_do_setlk(state, cmd, request, 0);
3520 if (status != 0)
01c3b861 3521 goto out_unlock;
6bfc93ef 3522 /* Note: we always want to sleep here! */
01c3b861 3523 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef
TM		 3524 if (do_vfs_lock(request->fl_file, request) < 0)
3525 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
01c3b861 3526out_unlock:
1da177e4 3527 up_read(&clp->cl_sem);
01c3b861
TM		 3528out:
3529 request->fl_flags = fl_flags;
1da177e4
LT		 3530 return status;
3531}
3532
3533static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3534{
3535 struct nfs4_exception exception = { };
3536 int err;
3537
3538 do {
3539 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3540 _nfs4_proc_setlk(state, cmd, request),
3541 &exception);
3542 } while (exception.retry);
3543 return err;
3544}
3545
3546static int
3547nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3548{
3549 struct nfs_open_context *ctx;
3550 struct nfs4_state *state;
3551 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3552 int status;
3553
3554 /* verify open state */
cd3758e3 3555 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3556 state = ctx->state;
3557
3558 if (request->fl_start < 0 || request->fl_end < 0)
3559 return -EINVAL;
3560
3561 if (IS_GETLK(cmd))
3562 return nfs4_proc_getlk(state, F_GETLK, request);
3563
3564 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3565 return -EINVAL;
3566
3567 if (request->fl_type == F_UNLCK)
3568 return nfs4_proc_unlck(state, cmd, request);
3569
3570 do {
3571 status = nfs4_proc_setlk(state, cmd, request);
3572 if ((status != -EAGAIN) || IS_SETLK(cmd))
3573 break;
3574 timeout = nfs4_set_lock_task_retry(timeout);
3575 status = -ERESTARTSYS;
3576 if (signalled())
3577 break;
3578 } while(status < 0);
1da177e4
LT		 3579 return status;
3580}
3581
888e694c
TM		 3582int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3583{
3584 struct nfs_server *server = NFS_SERVER(state->inode);
3585 struct nfs4_exception exception = { };
3586 int err;
3587
3588 err = nfs4_set_lock_state(state, fl);
3589 if (err != 0)
3590 goto out;
3591 do {
3592 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3593 if (err != -NFS4ERR_DELAY)
3594 break;
3595 err = nfs4_handle_exception(server, err, &exception);
3596 } while (exception.retry);
3597out:
3598 return err;
3599}
6b3b5496 3600
aa1870af
BF		 3601#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3602
6b3b5496
BF		 3603int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3604 size_t buflen, int flags)
3605{
4b580ee3
BF		 3606 struct inode *inode = dentry->d_inode;
3607
3608 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3609 return -EOPNOTSUPP;
3610
3611 if (!S_ISREG(inode->i_mode) &&
3612 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3613 return -EPERM;
3614
3615 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3616}
3617
3618/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3619 * and that's what we'll do for e.g. user attributes that haven't been set.
3620 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3621 * attributes in kernel-managed attribute namespaces. */
3622ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3623 size_t buflen)
3624{
aa1870af
BF		 3625 struct inode *inode = dentry->d_inode;
3626
3627 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3628 return -EOPNOTSUPP;
3629
3630 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3631}
3632
3633ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3634{
aa1870af 3635 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3636
096455a2
BF		 3637 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3638 return 0;
6b3b5496
BF		 3639 if (buf && buflen < len)
3640 return -ERANGE;
3641 if (buf)
aa1870af
BF		 3642 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3643 return len;
6b3b5496
BF		 3644}
3645
56659e99 3646int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3647 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3648{
3649 struct nfs_server *server = NFS_SERVER(dir);
3650 u32 bitmask[2] = {
361e624f
MN		 3651 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3652 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3653 };
3654 struct nfs4_fs_locations_arg args = {
3655 .dir_fh = NFS_FH(dir),
c228fd3a 3656 .name = name,
683b57b4
TM		 3657 .page = page,
3658 .bitmask = bitmask,
3659 };
3660 struct rpc_message msg = {
3661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3662 .rpc_argp = &args,
7aaa0b3b 3663 .rpc_resp = fs_locations,
683b57b4
TM		 3664 };
3665 int status;
3666
3667 dprintk("%s: start\n", __FUNCTION__);
c228fd3a 3668 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3669 fs_locations->server = server;
830b8e33 3670 fs_locations->nlocations = 0;
683b57b4
TM		 3671 status = rpc_call_sync(server->client, &msg, 0);
3672 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3673 return status;
3674}
3675
1da177e4
LT		 3676struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3677 .recover_open = nfs4_open_reclaim,
3678 .recover_lock = nfs4_lock_reclaim,
3679};
3680
3681struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3682 .recover_open = nfs4_open_expired,
3683 .recover_lock = nfs4_lock_expired,
3684};
3685
92e1d5be 3686static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3687 .permission = nfs_permission,
3688 .getattr = nfs_getattr,
3689 .setattr = nfs_setattr,
3690 .getxattr = nfs4_getxattr,
3691 .setxattr = nfs4_setxattr,
3692 .listxattr = nfs4_listxattr,
3693};
3694
509de811 3695const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3696 .version = 4, /* protocol version */
3697 .dentry_ops = &nfs4_dentry_operations,
3698 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3699 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3700 .getroot = nfs4_proc_get_root,
3701 .getattr = nfs4_proc_getattr,
3702 .setattr = nfs4_proc_setattr,
2b3de441 3703 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3704 .lookup = nfs4_proc_lookup,
3705 .access = nfs4_proc_access,
3706 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3707 .create = nfs4_proc_create,
3708 .remove = nfs4_proc_remove,
3709 .unlink_setup = nfs4_proc_unlink_setup,
3710 .unlink_done = nfs4_proc_unlink_done,
3711 .rename = nfs4_proc_rename,
3712 .link = nfs4_proc_link,
3713 .symlink = nfs4_proc_symlink,
3714 .mkdir = nfs4_proc_mkdir,
3715 .rmdir = nfs4_proc_remove,
3716 .readdir = nfs4_proc_readdir,
3717 .mknod = nfs4_proc_mknod,
3718 .statfs = nfs4_proc_statfs,
3719 .fsinfo = nfs4_proc_fsinfo,
3720 .pathconf = nfs4_proc_pathconf,
e9326dca 3721 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3722 .decode_dirent = nfs4_decode_dirent,
3723 .read_setup = nfs4_proc_read_setup,
ec06c096 3724 .read_done = nfs4_read_done,
1da177e4 3725 .write_setup = nfs4_proc_write_setup,
788e7a89 3726 .write_done = nfs4_write_done,
1da177e4 3727 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3728 .commit_done = nfs4_commit_done,
02a913a7
TM		 3729 .file_open = nfs_open,
3730 .file_release = nfs_release,
1da177e4 3731 .lock = nfs4_proc_lock,
e50a1c2e 3732 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3733};
3734
3735/*
3736 * Local variables:
3737 * c-basic-offset: 8
3738 * End:
3739 */
Linux 6.x block layer and io_uring tree(s)