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NFS: Add an nfsiod workqueue
[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);
40d24704
TM		 211 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
212 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 213 nfs_force_lookup_revalidate(dir);
40d24704 214 nfsi->change_attr = cinfo->after;
38478b24 215 spin_unlock(&dir->i_lock);
1da177e4
LT		 216}
217
e56e0b78 218struct nfs4_opendata {
c6d00e63 219 struct kref kref;
e56e0b78
TM		 220 struct nfs_openargs o_arg;
221 struct nfs_openres o_res;
cdd4e68b
TM		 222 struct nfs_open_confirmargs c_arg;
223 struct nfs_open_confirmres c_res;
e56e0b78
TM		 224 struct nfs_fattr f_attr;
225 struct nfs_fattr dir_attr;
ad389da7 226 struct path path;
e56e0b78
TM		 227 struct dentry *dir;
228 struct nfs4_state_owner *owner;
aac00a8d 229 struct nfs4_state *state;
e56e0b78 230 struct iattr attrs;
26e976a8 231 unsigned long timestamp;
3e309914 232 unsigned int rpc_done : 1;
24ac23ab
TM		 233 int rpc_status;
234 int cancelled;
e56e0b78
TM		 235};
236
2ced46c2
TM		 237
238static void nfs4_init_opendata_res(struct nfs4_opendata *p)
239{
240 p->o_res.f_attr = &p->f_attr;
241 p->o_res.dir_attr = &p->dir_attr;
242 p->o_res.server = p->o_arg.server;
243 nfs_fattr_init(&p->f_attr);
244 nfs_fattr_init(&p->dir_attr);
245}
246
ad389da7 247static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
e56e0b78
TM		 248 struct nfs4_state_owner *sp, int flags,
249 const struct iattr *attrs)
250{
ad389da7 251 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 252 struct inode *dir = parent->d_inode;
253 struct nfs_server *server = NFS_SERVER(dir);
254 struct nfs4_opendata *p;
255
256 p = kzalloc(sizeof(*p), GFP_KERNEL);
257 if (p == NULL)
258 goto err;
259 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
260 if (p->o_arg.seqid == NULL)
261 goto err_free;
ad389da7
TM		 262 p->path.mnt = mntget(path->mnt);
263 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 264 p->dir = parent;
265 p->owner = sp;
266 atomic_inc(&sp->so_count);
267 p->o_arg.fh = NFS_FH(dir);
268 p->o_arg.open_flags = flags,
7539bbab 269 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 270 p->o_arg.id = sp->so_owner_id.id;
ad389da7 271 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 272 p->o_arg.server = server;
273 p->o_arg.bitmask = server->attr_bitmask;
274 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 275 if (flags & O_EXCL) {
276 u32 *s = (u32 *) p->o_arg.u.verifier.data;
277 s[0] = jiffies;
278 s[1] = current->pid;
279 } else if (flags & O_CREAT) {
280 p->o_arg.u.attrs = &p->attrs;
281 memcpy(&p->attrs, attrs, sizeof(p->attrs));
282 }
cdd4e68b
TM		 283 p->c_arg.fh = &p->o_res.fh;
284 p->c_arg.stateid = &p->o_res.stateid;
285 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 286 nfs4_init_opendata_res(p);
c6d00e63 287 kref_init(&p->kref);
e56e0b78
TM		 288 return p;
289err_free:
290 kfree(p);
291err:
292 dput(parent);
293 return NULL;
294}
295
c6d00e63 296static void nfs4_opendata_free(struct kref *kref)
e56e0b78 297{
c6d00e63
TM		 298 struct nfs4_opendata *p = container_of(kref,
299 struct nfs4_opendata, kref);
300
301 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 302 if (p->state != NULL)
303 nfs4_put_open_state(p->state);
c6d00e63
TM		 304 nfs4_put_state_owner(p->owner);
305 dput(p->dir);
306 dput(p->path.dentry);
307 mntput(p->path.mnt);
308 kfree(p);
309}
310
311static void nfs4_opendata_put(struct nfs4_opendata *p)
312{
313 if (p != NULL)
314 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 315}
316
06f814a3
TM		 317static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
318{
06f814a3
TM		 319 int ret;
320
06f814a3 321 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 322 return ret;
323}
324
6ee41268
TM		 325static int can_open_cached(struct nfs4_state *state, int mode)
326{
327 int ret = 0;
328 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
329 case FMODE_READ:
330 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 331 break;
332 case FMODE_WRITE:
333 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 334 break;
335 case FMODE_READ|FMODE_WRITE:
336 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
337 }
338 return ret;
339}
340
aac00a8d
TM		 341static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
342{
343 if ((delegation->type & open_flags) != open_flags)
344 return 0;
345 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
346 return 0;
347 return 1;
348}
349
003707c7 350static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
e7616923
TM		 351{
352 switch (open_flags) {
353 case FMODE_WRITE:
354 state->n_wronly++;
355 break;
356 case FMODE_READ:
357 state->n_rdonly++;
358 break;
359 case FMODE_READ|FMODE_WRITE:
360 state->n_rdwr++;
361 }
003707c7
TM		 362 nfs4_state_set_mode_locked(state, state->state | open_flags);
363}
364
365static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
366{
367 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
368 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
369 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
370 switch (open_flags) {
371 case FMODE_READ:
372 set_bit(NFS_O_RDONLY_STATE, &state->flags);
373 break;
374 case FMODE_WRITE:
375 set_bit(NFS_O_WRONLY_STATE, &state->flags);
376 break;
377 case FMODE_READ|FMODE_WRITE:
378 set_bit(NFS_O_RDWR_STATE, &state->flags);
379 }
e7616923
TM		 380}
381
003707c7
TM		 382static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
383{
8bda4e4c 384 write_seqlock(&state->seqlock);
003707c7 385 nfs_set_open_stateid_locked(state, stateid, open_flags);
8bda4e4c 386 write_sequnlock(&state->seqlock);
003707c7
TM		 387}
388
389static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
1da177e4 390{
1da177e4 391 open_flags &= (FMODE_READ|FMODE_WRITE);
8bda4e4c
TM		 392 /*
393 * Protect the call to nfs4_state_set_mode_locked and
394 * serialise the stateid update
395 */
396 write_seqlock(&state->seqlock);
003707c7
TM		 397 if (deleg_stateid != NULL) {
398 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
399 set_bit(NFS_DELEGATED_STATE, &state->flags);
400 }
401 if (open_stateid != NULL)
402 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
8bda4e4c
TM		 403 write_sequnlock(&state->seqlock);
404 spin_lock(&state->owner->so_lock);
e7616923 405 update_open_stateflags(state, open_flags);
ec073428 406 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 407}
408
aac00a8d
TM		 409static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
410{
411 struct nfs_delegation *delegation;
412
413 rcu_read_lock();
414 delegation = rcu_dereference(NFS_I(inode)->delegation);
415 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
416 rcu_read_unlock();
417 return;
418 }
419 rcu_read_unlock();
420 nfs_inode_return_delegation(inode);
421}
422
6ee41268 423static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 424{
425 struct nfs4_state *state = opendata->state;
426 struct nfs_inode *nfsi = NFS_I(state->inode);
427 struct nfs_delegation *delegation;
428 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
429 nfs4_stateid stateid;
430 int ret = -EAGAIN;
431
432 rcu_read_lock();
433 delegation = rcu_dereference(nfsi->delegation);
aac00a8d 434 for (;;) {
6ee41268
TM		 435 if (can_open_cached(state, open_mode)) {
436 spin_lock(&state->owner->so_lock);
437 if (can_open_cached(state, open_mode)) {
438 update_open_stateflags(state, open_mode);
439 spin_unlock(&state->owner->so_lock);
440 rcu_read_unlock();
441 goto out_return_state;
442 }
443 spin_unlock(&state->owner->so_lock);
444 }
445 if (delegation == NULL)
446 break;
aac00a8d
TM		 447 if (!can_open_delegated(delegation, open_mode))
448 break;
449 /* Save the delegation */
450 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
451 rcu_read_unlock();
452 lock_kernel();
af22f94a 453 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 454 unlock_kernel();
455 if (ret != 0)
456 goto out;
457 ret = -EAGAIN;
458 rcu_read_lock();
459 delegation = rcu_dereference(nfsi->delegation);
6ee41268 460 /* If no delegation, try a cached open */
aac00a8d 461 if (delegation == NULL)
6ee41268 462 continue;
aac00a8d
TM		 463 /* Is the delegation still valid? */
464 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
465 continue;
466 rcu_read_unlock();
467 update_open_stateid(state, NULL, &stateid, open_mode);
468 goto out_return_state;
469 }
aac00a8d
TM		 470 rcu_read_unlock();
471out:
472 return ERR_PTR(ret);
473out_return_state:
474 atomic_inc(&state->count);
475 return state;
476}
477
24ac23ab
TM		 478static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
479{
480 struct inode *inode;
481 struct nfs4_state *state = NULL;
003707c7
TM		 482 struct nfs_delegation *delegation;
483 nfs4_stateid *deleg_stateid = NULL;
1b370bc2 484 int ret;
24ac23ab 485
aac00a8d 486 if (!data->rpc_done) {
6ee41268 487 state = nfs4_try_open_cached(data);
aac00a8d
TM		 488 goto out;
489 }
490
1b370bc2 491 ret = -EAGAIN;
24ac23ab 492 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 493 goto err;
24ac23ab 494 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 495 ret = PTR_ERR(inode);
03f28e3a 496 if (IS_ERR(inode))
1b370bc2
TM		 497 goto err;
498 ret = -ENOMEM;
24ac23ab
TM		 499 state = nfs4_get_open_state(inode, data->owner);
500 if (state == NULL)
1b370bc2 501 goto err_put_inode;
549d6ed5 502 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 503 int delegation_flags = 0;
504
003707c7
TM		 505 rcu_read_lock();
506 delegation = rcu_dereference(NFS_I(inode)->delegation);
507 if (delegation)
508 delegation_flags = delegation->flags;
509 rcu_read_unlock();
549d6ed5
TM		 510 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
511 nfs_inode_set_delegation(state->inode,
512 data->owner->so_cred,
513 &data->o_res);
514 else
515 nfs_inode_reclaim_delegation(state->inode,
516 data->owner->so_cred,
517 &data->o_res);
518 }
003707c7
TM		 519 rcu_read_lock();
520 delegation = rcu_dereference(NFS_I(inode)->delegation);
521 if (delegation != NULL)
522 deleg_stateid = &delegation->stateid;
523 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
524 rcu_read_unlock();
24ac23ab 525 iput(inode);
aac00a8d 526out:
24ac23ab 527 return state;
1b370bc2
TM		 528err_put_inode:
529 iput(inode);
530err:
531 return ERR_PTR(ret);
24ac23ab
TM		 532}
533
864472e9
TM		 534static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
535{
536 struct nfs_inode *nfsi = NFS_I(state->inode);
537 struct nfs_open_context *ctx;
538
539 spin_lock(&state->inode->i_lock);
540 list_for_each_entry(ctx, &nfsi->open_files, list) {
541 if (ctx->state != state)
542 continue;
543 get_nfs_open_context(ctx);
544 spin_unlock(&state->inode->i_lock);
545 return ctx;
546 }
547 spin_unlock(&state->inode->i_lock);
548 return ERR_PTR(-ENOENT);
549}
550
6f220ed5
TM		 551static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
552{
553 struct nfs4_opendata *opendata;
554
555 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
556 if (opendata == NULL)
557 return ERR_PTR(-ENOMEM);
558 opendata->state = state;
559 atomic_inc(&state->count);
560 return opendata;
561}
562
2ced46c2 563static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
864472e9 564{
2ced46c2 565 struct nfs4_state *newstate;
864472e9
TM		 566 int ret;
567
568 opendata->o_arg.open_flags = openflags;
2ced46c2
TM		 569 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
570 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
571 nfs4_init_opendata_res(opendata);
864472e9
TM		 572 ret = _nfs4_proc_open(opendata);
573 if (ret != 0)
574 return ret;
2ced46c2 575 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 576 if (IS_ERR(newstate))
577 return PTR_ERR(newstate);
578 nfs4_close_state(&opendata->path, newstate, openflags);
2ced46c2 579 *res = newstate;
864472e9
TM		 580 return 0;
581}
582
583static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
584{
864472e9 585 struct nfs4_state *newstate;
864472e9
TM		 586 int ret;
587
588 /* memory barrier prior to reading state->n_* */
2ced46c2 589 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 590 smp_rmb();
591 if (state->n_rdwr != 0) {
2ced46c2 592 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 593 if (ret != 0)
594 return ret;
2ced46c2
TM		 595 if (newstate != state)
596 return -ESTALE;
864472e9
TM		 597 }
598 if (state->n_wronly != 0) {
2ced46c2 599 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 600 if (ret != 0)
601 return ret;
2ced46c2
TM		 602 if (newstate != state)
603 return -ESTALE;
864472e9
TM		 604 }
605 if (state->n_rdonly != 0) {
2ced46c2 606 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 607 if (ret != 0)
608 return ret;
2ced46c2
TM		 609 if (newstate != state)
610 return -ESTALE;
864472e9 611 }
1ac7e2fd
TM		 612 /*
613 * We may have performed cached opens for all three recoveries.
614 * Check if we need to update the current stateid.
615 */
616 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
617 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 618 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 619 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
620 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 621 write_sequnlock(&state->seqlock);
1ac7e2fd 622 }
864472e9
TM		 623 return 0;
624}
625
1da177e4
LT		 626/*
627 * OPEN_RECLAIM:
628 * reclaim state on the server after a reboot.
1da177e4 629 */
539cd03a 630static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 631{
1ac7e2fd 632 struct nfs_delegation *delegation;
864472e9
TM		 633 struct nfs4_opendata *opendata;
634 int delegation_type = 0;
1da177e4
LT		 635 int status;
636
6f220ed5
TM		 637 opendata = nfs4_open_recoverdata_alloc(ctx, state);
638 if (IS_ERR(opendata))
639 return PTR_ERR(opendata);
864472e9
TM		 640 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
641 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 642 rcu_read_lock();
643 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
644 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
65bbf6bd 645 delegation_type = delegation->type;
1ac7e2fd 646 rcu_read_unlock();
864472e9
TM		 647 opendata->o_arg.u.delegation_type = delegation_type;
648 status = nfs4_open_recover(opendata, state);
c6d00e63 649 nfs4_opendata_put(opendata);
1da177e4
LT		 650 return status;
651}
652
539cd03a 653static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 654{
655 struct nfs_server *server = NFS_SERVER(state->inode);
656 struct nfs4_exception exception = { };
657 int err;
658 do {
539cd03a 659 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 660 if (err != -NFS4ERR_DELAY)
661 break;
662 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 663 } while (exception.retry);
664 return err;
665}
666
864472e9
TM		 667static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
668{
669 struct nfs_open_context *ctx;
670 int ret;
671
672 ctx = nfs4_state_find_open_context(state);
673 if (IS_ERR(ctx))
674 return PTR_ERR(ctx);
539cd03a 675 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 676 put_nfs_open_context(ctx);
677 return ret;
678}
679
13437e12 680static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 681{
e56e0b78 682 struct nfs4_opendata *opendata;
864472e9 683 int ret;
1da177e4 684
6f220ed5
TM		 685 opendata = nfs4_open_recoverdata_alloc(ctx, state);
686 if (IS_ERR(opendata))
687 return PTR_ERR(opendata);
e56e0b78 688 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 689 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 690 sizeof(opendata->o_arg.u.delegation.data));
864472e9 691 ret = nfs4_open_recover(opendata, state);
c6d00e63 692 nfs4_opendata_put(opendata);
864472e9 693 return ret;
1da177e4
LT		 694}
695
13437e12 696int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 697{
698 struct nfs4_exception exception = { };
539cd03a 699 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 700 int err;
701 do {
13437e12 702 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 703 switch (err) {
704 case 0:
705 return err;
706 case -NFS4ERR_STALE_CLIENTID:
707 case -NFS4ERR_STALE_STATEID:
708 case -NFS4ERR_EXPIRED:
709 /* Don't recall a delegation if it was lost */
7539bbab 710 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 711 return err;
712 }
713 err = nfs4_handle_exception(server, err, &exception);
714 } while (exception.retry);
715 return err;
716}
717
cdd4e68b
TM		 718static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
719{
720 struct nfs4_opendata *data = calldata;
721
722 data->rpc_status = task->tk_status;
723 if (RPC_ASSASSINATED(task))
724 return;
26e976a8 725 if (data->rpc_status == 0) {
cdd4e68b
TM		 726 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
727 sizeof(data->o_res.stateid.data));
bb22629e 728 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 729 renew_lease(data->o_res.server, data->timestamp);
3e309914 730 data->rpc_done = 1;
26e976a8 731 }
0f9f95e0 732 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
cdd4e68b
TM		 733}
734
735static void nfs4_open_confirm_release(void *calldata)
736{
737 struct nfs4_opendata *data = calldata;
738 struct nfs4_state *state = NULL;
739
740 /* If this request hasn't been cancelled, do nothing */
741 if (data->cancelled == 0)
742 goto out_free;
743 /* In case of error, no cleanup! */
3e309914 744 if (!data->rpc_done)
cdd4e68b 745 goto out_free;
cdd4e68b 746 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 747 if (!IS_ERR(state))
4a35bd41 748 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
cdd4e68b 749out_free:
c6d00e63 750 nfs4_opendata_put(data);
cdd4e68b
TM		 751}
752
753static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 754 .rpc_call_done = nfs4_open_confirm_done,
755 .rpc_release = nfs4_open_confirm_release,
756};
757
758/*
759 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
760 */
761static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
762{
763 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
764 struct rpc_task *task;
5138fde0
TM		 765 struct rpc_message msg = {
766 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
767 .rpc_argp = &data->c_arg,
768 .rpc_resp = &data->c_res,
769 .rpc_cred = data->owner->so_cred,
770 };
c970aa85
TM		 771 struct rpc_task_setup task_setup_data = {
772 .rpc_client = server->client,
5138fde0 773 .rpc_message = &msg,
c970aa85
TM		 774 .callback_ops = &nfs4_open_confirm_ops,
775 .callback_data = data,
776 .flags = RPC_TASK_ASYNC,
777 };
1da177e4
LT		 778 int status;
779
c6d00e63 780 kref_get(&data->kref);
3e309914
TM		 781 data->rpc_done = 0;
782 data->rpc_status = 0;
5138fde0 783 data->timestamp = jiffies;
c970aa85 784 task = rpc_run_task(&task_setup_data);
7a1218a2 785 if (IS_ERR(task))
cdd4e68b 786 return PTR_ERR(task);
cdd4e68b
TM		 787 status = nfs4_wait_for_completion_rpc_task(task);
788 if (status != 0) {
789 data->cancelled = 1;
790 smp_wmb();
791 } else
792 status = data->rpc_status;
e6b3c4db 793 rpc_put_task(task);
1da177e4
LT		 794 return status;
795}
796
24ac23ab 797static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 798{
24ac23ab
TM		 799 struct nfs4_opendata *data = calldata;
800 struct nfs4_state_owner *sp = data->owner;
5138fde0 801
24ac23ab
TM		 802 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
803 return;
aac00a8d
TM		 804 /*
805 * Check if we still need to send an OPEN call, or if we can use
806 * a delegation instead.
807 */
808 if (data->state != NULL) {
809 struct nfs_delegation *delegation;
810
6ee41268
TM		 811 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
812 goto out_no_action;
aac00a8d
TM		 813 rcu_read_lock();
814 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
815 if (delegation != NULL &&
816 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
817 rcu_read_unlock();
6ee41268 818 goto out_no_action;
aac00a8d
TM		 819 }
820 rcu_read_unlock();
821 }
24ac23ab 822 /* Update sequence id. */
9f958ab8 823 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 824 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 825 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 826 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 827 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
828 }
26e976a8 829 data->timestamp = jiffies;
5138fde0 830 rpc_call_start(task);
6ee41268
TM		 831 return;
832out_no_action:
833 task->tk_action = NULL;
834
24ac23ab 835}
1da177e4 836
24ac23ab
TM		 837static void nfs4_open_done(struct rpc_task *task, void *calldata)
838{
839 struct nfs4_opendata *data = calldata;
1da177e4 840
24ac23ab
TM		 841 data->rpc_status = task->tk_status;
842 if (RPC_ASSASSINATED(task))
843 return;
844 if (task->tk_status == 0) {
845 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 846 case S_IFREG:
847 break;
848 case S_IFLNK:
24ac23ab 849 data->rpc_status = -ELOOP;
6f926b5b
TM		 850 break;
851 case S_IFDIR:
24ac23ab 852 data->rpc_status = -EISDIR;
6f926b5b
TM		 853 break;
854 default:
24ac23ab 855 data->rpc_status = -ENOTDIR;
6f926b5b 856 }
26e976a8 857 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 858 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
859 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 860 }
24ac23ab 861 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
3e309914 862 data->rpc_done = 1;
24ac23ab 863}
6f926b5b 864
24ac23ab
TM		 865static void nfs4_open_release(void *calldata)
866{
867 struct nfs4_opendata *data = calldata;
868 struct nfs4_state *state = NULL;
869
870 /* If this request hasn't been cancelled, do nothing */
871 if (data->cancelled == 0)
872 goto out_free;
873 /* In case of error, no cleanup! */
3e309914 874 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 875 goto out_free;
876 /* In case we need an open_confirm, no cleanup! */
877 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
878 goto out_free;
24ac23ab 879 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 880 if (!IS_ERR(state))
4a35bd41 881 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
24ac23ab 882out_free:
c6d00e63 883 nfs4_opendata_put(data);
24ac23ab
TM		 884}
885
886static const struct rpc_call_ops nfs4_open_ops = {
887 .rpc_call_prepare = nfs4_open_prepare,
888 .rpc_call_done = nfs4_open_done,
889 .rpc_release = nfs4_open_release,
890};
891
892/*
893 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
894 */
895static int _nfs4_proc_open(struct nfs4_opendata *data)
896{
897 struct inode *dir = data->dir->d_inode;
898 struct nfs_server *server = NFS_SERVER(dir);
899 struct nfs_openargs *o_arg = &data->o_arg;
900 struct nfs_openres *o_res = &data->o_res;
901 struct rpc_task *task;
5138fde0
TM		 902 struct rpc_message msg = {
903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
904 .rpc_argp = o_arg,
905 .rpc_resp = o_res,
906 .rpc_cred = data->owner->so_cred,
907 };
c970aa85
TM		 908 struct rpc_task_setup task_setup_data = {
909 .rpc_client = server->client,
5138fde0 910 .rpc_message = &msg,
c970aa85
TM		 911 .callback_ops = &nfs4_open_ops,
912 .callback_data = data,
913 .flags = RPC_TASK_ASYNC,
914 };
24ac23ab
TM		 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;
c970aa85 921 task = rpc_run_task(&task_setup_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;
003707c7 1251 int clear_rd, clear_wr, clear_rdwr;
9512135d 1252
963d8fe5 1253 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1254 return;
003707c7 1255
003707c7 1256 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1257 spin_lock(&state->owner->so_lock);
003707c7 1258 /* Calculate the change in open mode */
e7616923 1259 if (state->n_rdwr == 0) {
003707c7 1260 if (state->n_rdonly == 0) {
003707c7
TM		 1261 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1262 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1263 }
1264 if (state->n_wronly == 0) {
003707c7
TM		 1265 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1266 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1267 }
e7616923 1268 }
4cecb76f 1269 spin_unlock(&state->owner->so_lock);
003707c7 1270 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1271 /* Note: exit _without_ calling nfs4_close_done */
1272 task->tk_action = NULL;
9512135d
TM		 1273 return;
1274 }
516a6af6 1275 nfs_fattr_init(calldata->res.fattr);
45328c35 1276 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1277 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1278 calldata->arg.open_flags = FMODE_READ;
1279 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1280 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
45328c35
TM		 1281 calldata->arg.open_flags = FMODE_WRITE;
1282 }
26e976a8 1283 calldata->timestamp = jiffies;
5138fde0 1284 rpc_call_start(task);
1da177e4
LT		 1285}
1286
963d8fe5 1287static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1288 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1289 .rpc_call_done = nfs4_close_done,
1290 .rpc_release = nfs4_free_closedata,
1291};
1292
1da177e4
LT		 1293/*
1294 * It is possible for data to be read/written from a mem-mapped file
1295 * after the sys_close call (which hits the vfs layer as a flush).
1296 * This means that we can't safely call nfsv4 close on a file until
1297 * the inode is cleared. This in turn means that we are not good
1298 * NFSv4 citizens - we do not indicate to the server to update the file's
1299 * share state even when we are done with one of the three share
1300 * stateid's in the inode.
1301 *
1302 * NOTE: Caller must be holding the sp->so_owner semaphore!
1303 */
a49c3c77 1304int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1305{
4a35bd41 1306 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1307 struct nfs4_closedata *calldata;
b39e625b
TM		 1308 struct nfs4_state_owner *sp = state->owner;
1309 struct rpc_task *task;
5138fde0
TM		 1310 struct rpc_message msg = {
1311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1312 .rpc_cred = state->owner->so_cred,
1313 };
c970aa85
TM		 1314 struct rpc_task_setup task_setup_data = {
1315 .rpc_client = server->client,
5138fde0 1316 .rpc_message = &msg,
c970aa85
TM		 1317 .callback_ops = &nfs4_close_ops,
1318 .flags = RPC_TASK_ASYNC,
1319 };
9512135d 1320 int status = -ENOMEM;
1da177e4 1321
9512135d 1322 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1323 if (calldata == NULL)
9512135d 1324 goto out;
4a35bd41 1325 calldata->inode = state->inode;
1da177e4 1326 calldata->state = state;
4a35bd41 1327 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1328 calldata->arg.stateid = &state->open_stateid;
1da177e4 1329 /* Serialization for the sequence id */
cee54fc9 1330 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1331 if (calldata->arg.seqid == NULL)
1332 goto out_free_calldata;
516a6af6
TM		 1333 calldata->arg.bitmask = server->attr_bitmask;
1334 calldata->res.fattr = &calldata->fattr;
1335 calldata->res.server = server;
4a35bd41
TM		 1336 calldata->path.mnt = mntget(path->mnt);
1337 calldata->path.dentry = dget(path->dentry);
9512135d 1338
5138fde0
TM		 1339 msg.rpc_argp = &calldata->arg,
1340 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1341 task_setup_data.callback_data = calldata;
1342 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1343 if (IS_ERR(task))
1344 return PTR_ERR(task);
a49c3c77
TM		 1345 status = 0;
1346 if (wait)
1347 status = rpc_wait_for_completion_task(task);
b39e625b 1348 rpc_put_task(task);
a49c3c77 1349 return status;
9512135d
TM		 1350out_free_calldata:
1351 kfree(calldata);
1352out:
b39e625b
TM		 1353 nfs4_put_open_state(state);
1354 nfs4_put_state_owner(sp);
9512135d 1355 return status;
1da177e4
LT		 1356}
1357
4a35bd41 1358static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
02a913a7
TM		 1359{
1360 struct file *filp;
1b45c46c 1361 int ret;
02a913a7 1362
1b45c46c
TM		 1363 /* If the open_intent is for execute, we have an extra check to make */
1364 if (nd->intent.open.flags & FMODE_EXEC) {
af22f94a 1365 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1366 state->owner->so_cred,
1367 nd->intent.open.flags);
1368 if (ret < 0)
1369 goto out_close;
1370 }
4a35bd41 1371 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1372 if (!IS_ERR(filp)) {
1373 struct nfs_open_context *ctx;
cd3758e3 1374 ctx = nfs_file_open_context(filp);
02a913a7 1375 ctx->state = state;
95cf959b
TM		 1376 return 0;
1377 }
1b45c46c
TM		 1378 ret = PTR_ERR(filp);
1379out_close:
a49c3c77 1380 nfs4_close_sync(path, state, nd->intent.open.flags);
1b45c46c 1381 return ret;
02a913a7
TM		 1382}
1383
1384struct dentry *
1da177e4
LT		 1385nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1386{
ad389da7 1387 struct path path = {
4ac91378 1388 .mnt = nd->path.mnt,
ad389da7
TM		 1389 .dentry = dentry,
1390 };
4ac91378 1391 struct dentry *parent;
1da177e4
LT		 1392 struct iattr attr;
1393 struct rpc_cred *cred;
1394 struct nfs4_state *state;
02a913a7 1395 struct dentry *res;
1da177e4
LT		 1396
1397 if (nd->flags & LOOKUP_CREATE) {
1398 attr.ia_mode = nd->intent.open.create_mode;
1399 attr.ia_valid = ATTR_MODE;
1400 if (!IS_POSIXACL(dir))
1401 attr.ia_mode &= ~current->fs->umask;
1402 } else {
1403 attr.ia_valid = 0;
1404 BUG_ON(nd->intent.open.flags & O_CREAT);
1405 }
1406
1f163415 1407 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4 1408 if (IS_ERR(cred))
02a913a7 1409 return (struct dentry *)cred;
565277f6
TM		 1410 parent = dentry->d_parent;
1411 /* Protect against concurrent sillydeletes */
1412 nfs_block_sillyrename(parent);
ad389da7 1413 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1da177e4 1414 put_rpccred(cred);
02a913a7 1415 if (IS_ERR(state)) {
d75340cc 1416 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1417 d_add(dentry, NULL);
d75340cc
TM		 1418 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1419 }
565277f6 1420 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1421 return (struct dentry *)state;
1422 }
24ac23ab 1423 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1424 if (res != NULL)
deee9369 1425 path.dentry = res;
d75340cc 1426 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1427 nfs_unblock_sillyrename(parent);
4a35bd41 1428 nfs4_intent_set_file(nd, &path, state);
02a913a7 1429 return res;
1da177e4
LT		 1430}
1431
1432int
02a913a7 1433nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1434{
ad389da7 1435 struct path path = {
4ac91378 1436 .mnt = nd->path.mnt,
ad389da7
TM		 1437 .dentry = dentry,
1438 };
1da177e4
LT		 1439 struct rpc_cred *cred;
1440 struct nfs4_state *state;
1da177e4 1441
1f163415 1442 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1443 if (IS_ERR(cred))
1444 return PTR_ERR(cred);
aac00a8d 1445 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1da177e4 1446 put_rpccred(cred);
02a913a7
TM		 1447 if (IS_ERR(state)) {
1448 switch (PTR_ERR(state)) {
1449 case -EPERM:
1450 case -EACCES:
1451 case -EDQUOT:
1452 case -ENOSPC:
1453 case -EROFS:
1454 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1455 return 1;
b87c0adf
CL		 1456 default:
1457 goto out_drop;
02a913a7 1458 }
02a913a7 1459 }
24ac23ab 1460 if (state->inode == dentry->d_inode) {
d75340cc 1461 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
4a35bd41 1462 nfs4_intent_set_file(nd, &path, state);
1da177e4
LT		 1463 return 1;
1464 }
a49c3c77 1465 nfs4_close_sync(&path, state, openflags);
02a913a7
TM		 1466out_drop:
1467 d_drop(dentry);
1da177e4
LT		 1468 return 0;
1469}
1470
1471
1472static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1473{
1474 struct nfs4_server_caps_res res = {};
1475 struct rpc_message msg = {
1476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1477 .rpc_argp = fhandle,
1478 .rpc_resp = &res,
1479 };
1480 int status;
1481
1482 status = rpc_call_sync(server->client, &msg, 0);
1483 if (status == 0) {
1484 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1485 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1486 server->caps |= NFS_CAP_ACLS;
1487 if (res.has_links != 0)
1488 server->caps |= NFS_CAP_HARDLINKS;
1489 if (res.has_symlinks != 0)
1490 server->caps |= NFS_CAP_SYMLINKS;
1491 server->acl_bitmask = res.acl_bitmask;
1492 }
1493 return status;
1494}
1495
55a97593 1496int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1497{
1498 struct nfs4_exception exception = { };
1499 int err;
1500 do {
1501 err = nfs4_handle_exception(server,
1502 _nfs4_server_capabilities(server, fhandle),
1503 &exception);
1504 } while (exception.retry);
1505 return err;
1506}
1507
1508static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1509 struct nfs_fsinfo *info)
1510{
1da177e4
LT		 1511 struct nfs4_lookup_root_arg args = {
1512 .bitmask = nfs4_fattr_bitmap,
1513 };
1514 struct nfs4_lookup_res res = {
1515 .server = server,
0e574af1 1516 .fattr = info->fattr,
1da177e4
LT		 1517 .fh = fhandle,
1518 };
1519 struct rpc_message msg = {
1520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1521 .rpc_argp = &args,
1522 .rpc_resp = &res,
1523 };
0e574af1 1524 nfs_fattr_init(info->fattr);
1da177e4
LT		 1525 return rpc_call_sync(server->client, &msg, 0);
1526}
1527
1528static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1529 struct nfs_fsinfo *info)
1530{
1531 struct nfs4_exception exception = { };
1532 int err;
1533 do {
1534 err = nfs4_handle_exception(server,
1535 _nfs4_lookup_root(server, fhandle, info),
1536 &exception);
1537 } while (exception.retry);
1538 return err;
1539}
1540
54ceac45
DH		 1541/*
1542 * get the file handle for the "/" directory on the server
1543 */
1da177e4 1544static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1545 struct nfs_fsinfo *info)
1da177e4 1546{
1da177e4
LT		 1547 int status;
1548
1da177e4 1549 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1550 if (status == 0)
1551 status = nfs4_server_capabilities(server, fhandle);
1552 if (status == 0)
1553 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1554 return nfs4_map_errors(status);
1da177e4
LT		 1555}
1556
6b97fd3d
MN		 1557/*
1558 * Get locations and (maybe) other attributes of a referral.
1559 * Note that we'll actually follow the referral later when
1560 * we detect fsid mismatch in inode revalidation
1561 */
56659e99 1562static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1563{
1564 int status = -ENOMEM;
1565 struct page *page = NULL;
1566 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1567
1568 page = alloc_page(GFP_KERNEL);
1569 if (page == NULL)
1570 goto out;
1571 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1572 if (locations == NULL)
1573 goto out;
1574
c228fd3a 1575 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1576 if (status != 0)
1577 goto out;
1578 /* Make sure server returned a different fsid for the referral */
1579 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1580 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1581 status = -EIO;
1582 goto out;
1583 }
1584
1585 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1586 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1587 if (!fattr->mode)
1588 fattr->mode = S_IFDIR;
1589 memset(fhandle, 0, sizeof(struct nfs_fh));
1590out:
1591 if (page)
1592 __free_page(page);
1593 if (locations)
1594 kfree(locations);
1595 return status;
1596}
1597
1da177e4
LT		 1598static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1599{
1600 struct nfs4_getattr_arg args = {
1601 .fh = fhandle,
1602 .bitmask = server->attr_bitmask,
1603 };
1604 struct nfs4_getattr_res res = {
1605 .fattr = fattr,
1606 .server = server,
1607 };
1608 struct rpc_message msg = {
1609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1610 .rpc_argp = &args,
1611 .rpc_resp = &res,
1612 };
1613
0e574af1 1614 nfs_fattr_init(fattr);
1da177e4
LT		 1615 return rpc_call_sync(server->client, &msg, 0);
1616}
1617
1618static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1619{
1620 struct nfs4_exception exception = { };
1621 int err;
1622 do {
1623 err = nfs4_handle_exception(server,
1624 _nfs4_proc_getattr(server, fhandle, fattr),
1625 &exception);
1626 } while (exception.retry);
1627 return err;
1628}
1629
1630/*
1631 * The file is not closed if it is opened due to the a request to change
1632 * the size of the file. The open call will not be needed once the
1633 * VFS layer lookup-intents are implemented.
1634 *
1635 * Close is called when the inode is destroyed.
1636 * If we haven't opened the file for O_WRONLY, we
1637 * need to in the size_change case to obtain a stateid.
1638 *
1639 * Got race?
1640 * Because OPEN is always done by name in nfsv4, it is
1641 * possible that we opened a different file by the same
1642 * name. We can recognize this race condition, but we
1643 * can't do anything about it besides returning an error.
1644 *
1645 * This will be fixed with VFS changes (lookup-intent).
1646 */
1647static int
1648nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1649 struct iattr *sattr)
1650{
08e9eac4
TM		 1651 struct rpc_cred *cred;
1652 struct inode *inode = dentry->d_inode;
d530838b
TM		 1653 struct nfs_open_context *ctx;
1654 struct nfs4_state *state = NULL;
1da177e4
LT		 1655 int status;
1656
0e574af1 1657 nfs_fattr_init(fattr);
1da177e4 1658
1f163415 1659 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
08e9eac4
TM		 1660 if (IS_ERR(cred))
1661 return PTR_ERR(cred);
d530838b
TM		 1662
1663 /* Search for an existing open(O_WRITE) file */
1664 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1665 if (ctx != NULL)
1666 state = ctx->state;
08e9eac4 1667
3e4f6290 1668 status = nfs4_do_setattr(inode, fattr, sattr, state);
65e4308d
TM		 1669 if (status == 0)
1670 nfs_setattr_update_inode(inode, sattr);
d530838b
TM		 1671 if (ctx != NULL)
1672 put_nfs_open_context(ctx);
08e9eac4 1673 put_rpccred(cred);
1da177e4
LT		 1674 return status;
1675}
1676
56659e99
TM		 1677static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1678 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1679 struct nfs_fattr *fattr)
1680{
1681 int status;
1682 struct nfs4_lookup_arg args = {
1683 .bitmask = server->attr_bitmask,
1684 .dir_fh = dirfh,
1685 .name = name,
1686 };
1687 struct nfs4_lookup_res res = {
1688 .server = server,
1689 .fattr = fattr,
1690 .fh = fhandle,
1691 };
1692 struct rpc_message msg = {
1693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1694 .rpc_argp = &args,
1695 .rpc_resp = &res,
1696 };
1697
1698 nfs_fattr_init(fattr);
1699
1700 dprintk("NFS call lookupfh %s\n", name->name);
1701 status = rpc_call_sync(server->client, &msg, 0);
1702 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1703 return status;
1704}
1705
1706static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1707 struct qstr *name, struct nfs_fh *fhandle,
1708 struct nfs_fattr *fattr)
1709{
1710 struct nfs4_exception exception = { };
1711 int err;
1712 do {
4e56e082
TM		 1713 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1714 /* FIXME: !!!! */
1715 if (err == -NFS4ERR_MOVED) {
1716 err = -EREMOTE;
1717 break;
1718 }
1719 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1720 } while (exception.retry);
1721 return err;
1722}
1723
56659e99 1724static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1725 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1726{
4e56e082 1727 int status;
1da177e4
LT		 1728
1729 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1730 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1731 if (status == -NFS4ERR_MOVED)
1732 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1733 dprintk("NFS reply lookup: %d\n", status);
1734 return status;
1735}
1736
1737static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1738{
1739 struct nfs4_exception exception = { };
1740 int err;
1741 do {
1742 err = nfs4_handle_exception(NFS_SERVER(dir),
1743 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1744 &exception);
1745 } while (exception.retry);
1746 return err;
1747}
1748
1749static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1750{
76b32999
TM		 1751 struct nfs_server *server = NFS_SERVER(inode);
1752 struct nfs_fattr fattr;
1da177e4
LT		 1753 struct nfs4_accessargs args = {
1754 .fh = NFS_FH(inode),
76b32999
TM		 1755 .bitmask = server->attr_bitmask,
1756 };
1757 struct nfs4_accessres res = {
1758 .server = server,
1759 .fattr = &fattr,
1da177e4 1760 };
1da177e4
LT		 1761 struct rpc_message msg = {
1762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1763 .rpc_argp = &args,
1764 .rpc_resp = &res,
1765 .rpc_cred = entry->cred,
1766 };
1767 int mode = entry->mask;
1768 int status;
1769
1770 /*
1771 * Determine which access bits we want to ask for...
1772 */
1773 if (mode & MAY_READ)
1774 args.access |= NFS4_ACCESS_READ;
1775 if (S_ISDIR(inode->i_mode)) {
1776 if (mode & MAY_WRITE)
1777 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1778 if (mode & MAY_EXEC)
1779 args.access |= NFS4_ACCESS_LOOKUP;
1780 } else {
1781 if (mode & MAY_WRITE)
1782 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1783 if (mode & MAY_EXEC)
1784 args.access |= NFS4_ACCESS_EXECUTE;
1785 }
76b32999 1786 nfs_fattr_init(&fattr);
1da177e4
LT		 1787 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1788 if (!status) {
1789 entry->mask = 0;
1790 if (res.access & NFS4_ACCESS_READ)
1791 entry->mask |= MAY_READ;
1792 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1793 entry->mask |= MAY_WRITE;
1794 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1795 entry->mask |= MAY_EXEC;
76b32999 1796 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 1797 }
1798 return status;
1799}
1800
1801static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1802{
1803 struct nfs4_exception exception = { };
1804 int err;
1805 do {
1806 err = nfs4_handle_exception(NFS_SERVER(inode),
1807 _nfs4_proc_access(inode, entry),
1808 &exception);
1809 } while (exception.retry);
1810 return err;
1811}
1812
1813/*
1814 * TODO: For the time being, we don't try to get any attributes
1815 * along with any of the zero-copy operations READ, READDIR,
1816 * READLINK, WRITE.
1817 *
1818 * In the case of the first three, we want to put the GETATTR
1819 * after the read-type operation -- this is because it is hard
1820 * to predict the length of a GETATTR response in v4, and thus
1821 * align the READ data correctly. This means that the GETATTR
1822 * may end up partially falling into the page cache, and we should
1823 * shift it into the 'tail' of the xdr_buf before processing.
1824 * To do this efficiently, we need to know the total length
1825 * of data received, which doesn't seem to be available outside
1826 * of the RPC layer.
1827 *
1828 * In the case of WRITE, we also want to put the GETATTR after
1829 * the operation -- in this case because we want to make sure
1830 * we get the post-operation mtime and size. This means that
1831 * we can't use xdr_encode_pages() as written: we need a variant
1832 * of it which would leave room in the 'tail' iovec.
1833 *
1834 * Both of these changes to the XDR layer would in fact be quite
1835 * minor, but I decided to leave them for a subsequent patch.
1836 */
1837static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1838 unsigned int pgbase, unsigned int pglen)
1839{
1840 struct nfs4_readlink args = {
1841 .fh = NFS_FH(inode),
1842 .pgbase = pgbase,
1843 .pglen = pglen,
1844 .pages = &page,
1845 };
1846 struct rpc_message msg = {
1847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1848 .rpc_argp = &args,
1849 .rpc_resp = NULL,
1850 };
1851
1852 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1853}
1854
1855static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1856 unsigned int pgbase, unsigned int pglen)
1857{
1858 struct nfs4_exception exception = { };
1859 int err;
1860 do {
1861 err = nfs4_handle_exception(NFS_SERVER(inode),
1862 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1863 &exception);
1864 } while (exception.retry);
1865 return err;
1866}
1867
1da177e4
LT		 1868/*
1869 * Got race?
1870 * We will need to arrange for the VFS layer to provide an atomic open.
1871 * Until then, this create/open method is prone to inefficiency and race
1872 * conditions due to the lookup, create, and open VFS calls from sys_open()
1873 * placed on the wire.
1874 *
1875 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1876 * The file will be opened again in the subsequent VFS open call
1877 * (nfs4_proc_file_open).
1878 *
1879 * The open for read will just hang around to be used by any process that
1880 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1881 */
1882
1883static int
1884nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 1885 int flags, struct nameidata *nd)
1da177e4 1886{
ad389da7 1887 struct path path = {
4ac91378 1888 .mnt = nd->path.mnt,
ad389da7
TM		 1889 .dentry = dentry,
1890 };
1da177e4
LT		 1891 struct nfs4_state *state;
1892 struct rpc_cred *cred;
1893 int status = 0;
1894
1f163415 1895 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1da177e4
LT		 1896 if (IS_ERR(cred)) {
1897 status = PTR_ERR(cred);
1898 goto out;
1899 }
ad389da7 1900 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1da177e4 1901 put_rpccred(cred);
d4d9cdcb 1902 d_drop(dentry);
1da177e4
LT		 1903 if (IS_ERR(state)) {
1904 status = PTR_ERR(state);
1905 goto out;
1906 }
d4d9cdcb 1907 d_add(dentry, igrab(state->inode));
d75340cc 1908 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 1909 if (flags & O_EXCL) {
1910 struct nfs_fattr fattr;
3e4f6290 1911 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
02a913a7 1912 if (status == 0)
65e4308d 1913 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 1914 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 1915 }
ad389da7 1916 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
4a35bd41 1917 status = nfs4_intent_set_file(nd, &path, state);
02a913a7 1918 else
a49c3c77 1919 nfs4_close_sync(&path, state, flags);
1da177e4
LT		 1920out:
1921 return status;
1922}
1923
1924static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1925{
16e42959 1926 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 1927 struct nfs_removeargs args = {
1da177e4 1928 .fh = NFS_FH(dir),
4fdc17b2
TM		 1929 .name.len = name->len,
1930 .name.name = name->name,
16e42959
TM		 1931 .bitmask = server->attr_bitmask,
1932 };
4fdc17b2 1933 struct nfs_removeres res = {
16e42959 1934 .server = server,
1da177e4 1935 };
1da177e4 1936 struct rpc_message msg = {
4fdc17b2
TM		 1937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1938 .rpc_argp = &args,
1939 .rpc_resp = &res,
1da177e4
LT		 1940 };
1941 int status;
1942
4fdc17b2 1943 nfs_fattr_init(&res.dir_attr);
16e42959
TM		 1944 status = rpc_call_sync(server->client, &msg, 0);
1945 if (status == 0) {
1946 update_changeattr(dir, &res.cinfo);
4fdc17b2 1947 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 1948 }
1da177e4
LT		 1949 return status;
1950}
1951
1952static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1953{
1954 struct nfs4_exception exception = { };
1955 int err;
1956 do {
1957 err = nfs4_handle_exception(NFS_SERVER(dir),
1958 _nfs4_proc_remove(dir, name),
1959 &exception);
1960 } while (exception.retry);
1961 return err;
1962}
1963
e4eff1a6 1964static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 1965{
e4eff1a6
TM		 1966 struct nfs_server *server = NFS_SERVER(dir);
1967 struct nfs_removeargs *args = msg->rpc_argp;
1968 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 1969
e4eff1a6
TM		 1970 args->bitmask = server->attr_bitmask;
1971 res->server = server;
1da177e4 1972 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 1973}
1974
e4eff1a6 1975static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 1976{
e4eff1a6
TM		 1977 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1978
1979 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1980 return 0;
1981 update_changeattr(dir, &res->cinfo);
1982 nfs_post_op_update_inode(dir, &res->dir_attr);
1983 return 1;
1da177e4
LT		 1984}
1985
1986static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1987 struct inode *new_dir, struct qstr *new_name)
1988{
6caf2c82 1989 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 1990 struct nfs4_rename_arg arg = {
1991 .old_dir = NFS_FH(old_dir),
1992 .new_dir = NFS_FH(new_dir),
1993 .old_name = old_name,
1994 .new_name = new_name,
6caf2c82
TM		 1995 .bitmask = server->attr_bitmask,
1996 };
1997 struct nfs_fattr old_fattr, new_fattr;
1998 struct nfs4_rename_res res = {
1999 .server = server,
2000 .old_fattr = &old_fattr,
2001 .new_fattr = &new_fattr,
1da177e4 2002 };
1da177e4
LT		 2003 struct rpc_message msg = {
2004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2005 .rpc_argp = &arg,
2006 .rpc_resp = &res,
2007 };
2008 int status;
2009
6caf2c82
TM		 2010 nfs_fattr_init(res.old_fattr);
2011 nfs_fattr_init(res.new_fattr);
2012 status = rpc_call_sync(server->client, &msg, 0);
1da177e4
LT		 2013
2014 if (!status) {
2015 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2016 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2017 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2018 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2019 }
2020 return status;
2021}
2022
2023static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2024 struct inode *new_dir, struct qstr *new_name)
2025{
2026 struct nfs4_exception exception = { };
2027 int err;
2028 do {
2029 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2030 _nfs4_proc_rename(old_dir, old_name,
2031 new_dir, new_name),
2032 &exception);
2033 } while (exception.retry);
2034 return err;
2035}
2036
2037static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2038{
91ba2eee 2039 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2040 struct nfs4_link_arg arg = {
2041 .fh = NFS_FH(inode),
2042 .dir_fh = NFS_FH(dir),
2043 .name = name,
91ba2eee
TM		 2044 .bitmask = server->attr_bitmask,
2045 };
2046 struct nfs_fattr fattr, dir_attr;
2047 struct nfs4_link_res res = {
2048 .server = server,
2049 .fattr = &fattr,
2050 .dir_attr = &dir_attr,
1da177e4 2051 };
1da177e4
LT		 2052 struct rpc_message msg = {
2053 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2054 .rpc_argp = &arg,
91ba2eee 2055 .rpc_resp = &res,
1da177e4
LT		 2056 };
2057 int status;
2058
91ba2eee
TM		 2059 nfs_fattr_init(res.fattr);
2060 nfs_fattr_init(res.dir_attr);
2061 status = rpc_call_sync(server->client, &msg, 0);
2062 if (!status) {
2063 update_changeattr(dir, &res.cinfo);
2064 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2065 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2066 }
1da177e4
LT		 2067
2068 return status;
2069}
2070
2071static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2072{
2073 struct nfs4_exception exception = { };
2074 int err;
2075 do {
2076 err = nfs4_handle_exception(NFS_SERVER(inode),
2077 _nfs4_proc_link(inode, dir, name),
2078 &exception);
2079 } while (exception.retry);
2080 return err;
2081}
2082
4f390c15 2083static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2084 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2085{
2086 struct nfs_server *server = NFS_SERVER(dir);
4f390c15
CL		 2087 struct nfs_fh fhandle;
2088 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2089 struct nfs4_create_arg arg = {
2090 .dir_fh = NFS_FH(dir),
2091 .server = server,
4f390c15 2092 .name = &dentry->d_name,
1da177e4
LT		 2093 .attrs = sattr,
2094 .ftype = NF4LNK,
2095 .bitmask = server->attr_bitmask,
2096 };
2097 struct nfs4_create_res res = {
2098 .server = server,
4f390c15
CL		 2099 .fh = &fhandle,
2100 .fattr = &fattr,
56ae19f3 2101 .dir_fattr = &dir_fattr,
1da177e4
LT		 2102 };
2103 struct rpc_message msg = {
2104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2105 .rpc_argp = &arg,
2106 .rpc_resp = &res,
2107 };
2108 int status;
2109
94a6d753 2110 if (len > NFS4_MAXPATHLEN)
1da177e4 2111 return -ENAMETOOLONG;
4f390c15 2112
94a6d753
CL		 2113 arg.u.symlink.pages = &page;
2114 arg.u.symlink.len = len;
4f390c15 2115 nfs_fattr_init(&fattr);
56ae19f3 2116 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2117
2118 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
4f390c15 2119 if (!status) {
1da177e4 2120 update_changeattr(dir, &res.dir_cinfo);
4f390c15
CL		 2121 nfs_post_op_update_inode(dir, res.dir_fattr);
2122 status = nfs_instantiate(dentry, &fhandle, &fattr);
2123 }
1da177e4
LT		 2124 return status;
2125}
2126
4f390c15 2127static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2128 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2129{
2130 struct nfs4_exception exception = { };
2131 int err;
2132 do {
2133 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2134 _nfs4_proc_symlink(dir, dentry, page,
2135 len, sattr),
1da177e4
LT		 2136 &exception);
2137 } while (exception.retry);
2138 return err;
2139}
2140
2141static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2142 struct iattr *sattr)
2143{
2144 struct nfs_server *server = NFS_SERVER(dir);
2145 struct nfs_fh fhandle;
56ae19f3 2146 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2147 struct nfs4_create_arg arg = {
2148 .dir_fh = NFS_FH(dir),
2149 .server = server,
2150 .name = &dentry->d_name,
2151 .attrs = sattr,
2152 .ftype = NF4DIR,
2153 .bitmask = server->attr_bitmask,
2154 };
2155 struct nfs4_create_res res = {
2156 .server = server,
2157 .fh = &fhandle,
2158 .fattr = &fattr,
56ae19f3 2159 .dir_fattr = &dir_fattr,
1da177e4
LT		 2160 };
2161 struct rpc_message msg = {
2162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2163 .rpc_argp = &arg,
2164 .rpc_resp = &res,
2165 };
2166 int status;
2167
0e574af1 2168 nfs_fattr_init(&fattr);
56ae19f3 2169 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2170
2171 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2172 if (!status) {
2173 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2174 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2175 status = nfs_instantiate(dentry, &fhandle, &fattr);
2176 }
2177 return status;
2178}
2179
2180static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2181 struct iattr *sattr)
2182{
2183 struct nfs4_exception exception = { };
2184 int err;
2185 do {
2186 err = nfs4_handle_exception(NFS_SERVER(dir),
2187 _nfs4_proc_mkdir(dir, dentry, sattr),
2188 &exception);
2189 } while (exception.retry);
2190 return err;
2191}
2192
2193static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2194 u64 cookie, struct page *page, unsigned int count, int plus)
2195{
2196 struct inode *dir = dentry->d_inode;
2197 struct nfs4_readdir_arg args = {
2198 .fh = NFS_FH(dir),
2199 .pages = &page,
2200 .pgbase = 0,
2201 .count = count,
2202 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2203 };
2204 struct nfs4_readdir_res res;
2205 struct rpc_message msg = {
2206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2207 .rpc_argp = &args,
2208 .rpc_resp = &res,
2209 .rpc_cred = cred,
2210 };
2211 int status;
2212
eadf4598
TM		 2213 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2214 dentry->d_parent->d_name.name,
2215 dentry->d_name.name,
2216 (unsigned long long)cookie);
1da177e4
LT		 2217 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2218 res.pgbase = args.pgbase;
2219 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2220 if (status == 0)
2221 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2222
2223 nfs_invalidate_atime(dir);
2224
eadf4598 2225 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 2226 return status;
2227}
2228
2229static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2230 u64 cookie, struct page *page, unsigned int count, int plus)
2231{
2232 struct nfs4_exception exception = { };
2233 int err;
2234 do {
2235 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2236 _nfs4_proc_readdir(dentry, cred, cookie,
2237 page, count, plus),
2238 &exception);
2239 } while (exception.retry);
2240 return err;
2241}
2242
2243static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2244 struct iattr *sattr, dev_t rdev)
2245{
2246 struct nfs_server *server = NFS_SERVER(dir);
2247 struct nfs_fh fh;
56ae19f3 2248 struct nfs_fattr fattr, dir_fattr;
1da177e4
LT		 2249 struct nfs4_create_arg arg = {
2250 .dir_fh = NFS_FH(dir),
2251 .server = server,
2252 .name = &dentry->d_name,
2253 .attrs = sattr,
2254 .bitmask = server->attr_bitmask,
2255 };
2256 struct nfs4_create_res res = {
2257 .server = server,
2258 .fh = &fh,
2259 .fattr = &fattr,
56ae19f3 2260 .dir_fattr = &dir_fattr,
1da177e4
LT		 2261 };
2262 struct rpc_message msg = {
2263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2264 .rpc_argp = &arg,
2265 .rpc_resp = &res,
2266 };
2267 int status;
2268 int mode = sattr->ia_mode;
2269
0e574af1 2270 nfs_fattr_init(&fattr);
56ae19f3 2271 nfs_fattr_init(&dir_fattr);
1da177e4
LT		 2272
2273 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2274 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2275 if (S_ISFIFO(mode))
2276 arg.ftype = NF4FIFO;
2277 else if (S_ISBLK(mode)) {
2278 arg.ftype = NF4BLK;
2279 arg.u.device.specdata1 = MAJOR(rdev);
2280 arg.u.device.specdata2 = MINOR(rdev);
2281 }
2282 else if (S_ISCHR(mode)) {
2283 arg.ftype = NF4CHR;
2284 arg.u.device.specdata1 = MAJOR(rdev);
2285 arg.u.device.specdata2 = MINOR(rdev);
2286 }
2287 else
2288 arg.ftype = NF4SOCK;
2289
2290 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2291 if (status == 0) {
2292 update_changeattr(dir, &res.dir_cinfo);
56ae19f3 2293 nfs_post_op_update_inode(dir, res.dir_fattr);
1da177e4
LT		 2294 status = nfs_instantiate(dentry, &fh, &fattr);
2295 }
2296 return status;
2297}
2298
2299static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2300 struct iattr *sattr, dev_t rdev)
2301{
2302 struct nfs4_exception exception = { };
2303 int err;
2304 do {
2305 err = nfs4_handle_exception(NFS_SERVER(dir),
2306 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2307 &exception);
2308 } while (exception.retry);
2309 return err;
2310}
2311
2312static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2313 struct nfs_fsstat *fsstat)
2314{
2315 struct nfs4_statfs_arg args = {
2316 .fh = fhandle,
2317 .bitmask = server->attr_bitmask,
2318 };
2319 struct rpc_message msg = {
2320 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2321 .rpc_argp = &args,
2322 .rpc_resp = fsstat,
2323 };
2324
0e574af1 2325 nfs_fattr_init(fsstat->fattr);
1da177e4
LT		 2326 return rpc_call_sync(server->client, &msg, 0);
2327}
2328
2329static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2330{
2331 struct nfs4_exception exception = { };
2332 int err;
2333 do {
2334 err = nfs4_handle_exception(server,
2335 _nfs4_proc_statfs(server, fhandle, fsstat),
2336 &exception);
2337 } while (exception.retry);
2338 return err;
2339}
2340
2341static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2342 struct nfs_fsinfo *fsinfo)
2343{
2344 struct nfs4_fsinfo_arg args = {
2345 .fh = fhandle,
2346 .bitmask = server->attr_bitmask,
2347 };
2348 struct rpc_message msg = {
2349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2350 .rpc_argp = &args,
2351 .rpc_resp = fsinfo,
2352 };
2353
2354 return rpc_call_sync(server->client, &msg, 0);
2355}
2356
2357static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2358{
2359 struct nfs4_exception exception = { };
2360 int err;
2361
2362 do {
2363 err = nfs4_handle_exception(server,
2364 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2365 &exception);
2366 } while (exception.retry);
2367 return err;
2368}
2369
2370static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2371{
0e574af1 2372 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2373 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2374}
2375
2376static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2377 struct nfs_pathconf *pathconf)
2378{
2379 struct nfs4_pathconf_arg args = {
2380 .fh = fhandle,
2381 .bitmask = server->attr_bitmask,
2382 };
2383 struct rpc_message msg = {
2384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2385 .rpc_argp = &args,
2386 .rpc_resp = pathconf,
2387 };
2388
2389 /* None of the pathconf attributes are mandatory to implement */
2390 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2391 memset(pathconf, 0, sizeof(*pathconf));
2392 return 0;
2393 }
2394
0e574af1 2395 nfs_fattr_init(pathconf->fattr);
1da177e4
LT		 2396 return rpc_call_sync(server->client, &msg, 0);
2397}
2398
2399static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2400 struct nfs_pathconf *pathconf)
2401{
2402 struct nfs4_exception exception = { };
2403 int err;
2404
2405 do {
2406 err = nfs4_handle_exception(server,
2407 _nfs4_proc_pathconf(server, fhandle, pathconf),
2408 &exception);
2409 } while (exception.retry);
2410 return err;
2411}
2412
ec06c096 2413static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2414{
ec06c096 2415 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2416
ec06c096 2417 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1da177e4 2418 rpc_restart_call(task);
ec06c096 2419 return -EAGAIN;
1da177e4 2420 }
8850df99
TM		 2421
2422 nfs_invalidate_atime(data->inode);
1da177e4 2423 if (task->tk_status > 0)
ec06c096
TM		 2424 renew_lease(server, data->timestamp);
2425 return 0;
1da177e4
LT		 2426}
2427
bdc7f021 2428static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2429{
1da177e4 2430 data->timestamp = jiffies;
bdc7f021 2431 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2432}
2433
788e7a89 2434static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2435{
1da177e4
LT		 2436 struct inode *inode = data->inode;
2437
2438 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2439 rpc_restart_call(task);
788e7a89 2440 return -EAGAIN;
1da177e4 2441 }
4f9838c7 2442 if (task->tk_status >= 0) {
1da177e4 2443 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2444 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2445 }
788e7a89 2446 return 0;
1da177e4
LT		 2447}
2448
bdc7f021 2449static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2450{
bdc7f021
TM		 2451 struct nfs_server *server = NFS_SERVER(data->inode);
2452
4f9838c7
TM		 2453 data->args.bitmask = server->attr_bitmask;
2454 data->res.server = server;
1da177e4
LT		 2455 data->timestamp = jiffies;
2456
bdc7f021 2457 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2458}
2459
788e7a89 2460static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2461{
1da177e4
LT		 2462 struct inode *inode = data->inode;
2463
2464 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2465 rpc_restart_call(task);
788e7a89 2466 return -EAGAIN;
1da177e4 2467 }
9e08a3c5 2468 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2469 return 0;
1da177e4
LT		 2470}
2471
bdc7f021 2472static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2473{
788e7a89 2474 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2475
4f9838c7
TM		 2476 data->args.bitmask = server->attr_bitmask;
2477 data->res.server = server;
bdc7f021 2478 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2479}
2480
2481/*
2482 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2483 * standalone procedure for queueing an asynchronous RENEW.
2484 */
963d8fe5 2485static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2486{
adfa6f98 2487 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2488 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2489
2490 if (task->tk_status < 0) {
2491 switch (task->tk_status) {
2492 case -NFS4ERR_STALE_CLIENTID:
2493 case -NFS4ERR_EXPIRED:
2494 case -NFS4ERR_CB_PATH_DOWN:
2495 nfs4_schedule_state_recovery(clp);
2496 }
2497 return;
2498 }
2499 spin_lock(&clp->cl_lock);
2500 if (time_before(clp->cl_last_renewal,timestamp))
2501 clp->cl_last_renewal = timestamp;
2502 spin_unlock(&clp->cl_lock);
2503}
2504
963d8fe5
TM		 2505static const struct rpc_call_ops nfs4_renew_ops = {
2506 .rpc_call_done = nfs4_renew_done,
2507};
2508
adfa6f98 2509int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2510{
2511 struct rpc_message msg = {
2512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2513 .rpc_argp = clp,
b4454fe1 2514 .rpc_cred = cred,
1da177e4
LT		 2515 };
2516
2517 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2518 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2519}
2520
adfa6f98 2521int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2522{
2523 struct rpc_message msg = {
2524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2525 .rpc_argp = clp,
b4454fe1 2526 .rpc_cred = cred,
1da177e4
LT		 2527 };
2528 unsigned long now = jiffies;
2529 int status;
2530
2531 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2532 if (status < 0)
2533 return status;
2534 spin_lock(&clp->cl_lock);
2535 if (time_before(clp->cl_last_renewal,now))
2536 clp->cl_last_renewal = now;
2537 spin_unlock(&clp->cl_lock);
2538 return 0;
2539}
2540
aa1870af
BF		 2541static inline int nfs4_server_supports_acls(struct nfs_server *server)
2542{
2543 return (server->caps & NFS_CAP_ACLS)
2544 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2545 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2546}
2547
2548/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2549 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2550 * the stack.
2551 */
2552#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2553
2554static void buf_to_pages(const void *buf, size_t buflen,
2555 struct page **pages, unsigned int *pgbase)
2556{
2557 const void *p = buf;
2558
2559 *pgbase = offset_in_page(buf);
2560 p -= *pgbase;
2561 while (p < buf + buflen) {
2562 *(pages++) = virt_to_page(p);
2563 p += PAGE_CACHE_SIZE;
2564 }
2565}
2566
e50a1c2e
BF		 2567struct nfs4_cached_acl {
2568 int cached;
2569 size_t len;
3e9d4154 2570 char data[0];
e50a1c2e
BF		 2571};
2572
2573static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2574{
2575 struct nfs_inode *nfsi = NFS_I(inode);
2576
2577 spin_lock(&inode->i_lock);
2578 kfree(nfsi->nfs4_acl);
2579 nfsi->nfs4_acl = acl;
2580 spin_unlock(&inode->i_lock);
2581}
2582
2583static void nfs4_zap_acl_attr(struct inode *inode)
2584{
2585 nfs4_set_cached_acl(inode, NULL);
2586}
2587
2588static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2589{
2590 struct nfs_inode *nfsi = NFS_I(inode);
2591 struct nfs4_cached_acl *acl;
2592 int ret = -ENOENT;
2593
2594 spin_lock(&inode->i_lock);
2595 acl = nfsi->nfs4_acl;
2596 if (acl == NULL)
2597 goto out;
2598 if (buf == NULL) /* user is just asking for length */
2599 goto out_len;
2600 if (acl->cached == 0)
2601 goto out;
2602 ret = -ERANGE; /* see getxattr(2) man page */
2603 if (acl->len > buflen)
2604 goto out;
2605 memcpy(buf, acl->data, acl->len);
2606out_len:
2607 ret = acl->len;
2608out:
2609 spin_unlock(&inode->i_lock);
2610 return ret;
2611}
2612
2613static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2614{
2615 struct nfs4_cached_acl *acl;
2616
2617 if (buf && acl_len <= PAGE_SIZE) {
2618 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2619 if (acl == NULL)
2620 goto out;
2621 acl->cached = 1;
2622 memcpy(acl->data, buf, acl_len);
2623 } else {
2624 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2625 if (acl == NULL)
2626 goto out;
2627 acl->cached = 0;
2628 }
2629 acl->len = acl_len;
2630out:
2631 nfs4_set_cached_acl(inode, acl);
2632}
2633
16b4289c 2634static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2635{
aa1870af
BF		 2636 struct page *pages[NFS4ACL_MAXPAGES];
2637 struct nfs_getaclargs args = {
2638 .fh = NFS_FH(inode),
2639 .acl_pages = pages,
2640 .acl_len = buflen,
2641 };
2642 size_t resp_len = buflen;
e50a1c2e 2643 void *resp_buf;
aa1870af
BF		 2644 struct rpc_message msg = {
2645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2646 .rpc_argp = &args,
2647 .rpc_resp = &resp_len,
2648 };
e50a1c2e 2649 struct page *localpage = NULL;
aa1870af
BF		 2650 int ret;
2651
e50a1c2e
BF		 2652 if (buflen < PAGE_SIZE) {
2653 /* As long as we're doing a round trip to the server anyway,
2654 * let's be prepared for a page of acl data. */
2655 localpage = alloc_page(GFP_KERNEL);
2656 resp_buf = page_address(localpage);
2657 if (localpage == NULL)
2658 return -ENOMEM;
2659 args.acl_pages[0] = localpage;
2660 args.acl_pgbase = 0;
1d95db8e 2661 resp_len = args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2662 } else {
2663 resp_buf = buf;
2664 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2665 }
aa1870af 2666 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2667 if (ret)
2668 goto out_free;
2669 if (resp_len > args.acl_len)
2670 nfs4_write_cached_acl(inode, NULL, resp_len);
2671 else
2672 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2673 if (buf) {
2674 ret = -ERANGE;
2675 if (resp_len > buflen)
2676 goto out_free;
2677 if (localpage)
2678 memcpy(buf, resp_buf, resp_len);
2679 }
2680 ret = resp_len;
2681out_free:
2682 if (localpage)
2683 __free_page(localpage);
aa1870af
BF		 2684 return ret;
2685}
2686
16b4289c
TM		 2687static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2688{
2689 struct nfs4_exception exception = { };
2690 ssize_t ret;
2691 do {
2692 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2693 if (ret >= 0)
2694 break;
2695 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2696 } while (exception.retry);
2697 return ret;
2698}
2699
e50a1c2e
BF		 2700static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2701{
2702 struct nfs_server *server = NFS_SERVER(inode);
2703 int ret;
2704
2705 if (!nfs4_server_supports_acls(server))
2706 return -EOPNOTSUPP;
2707 ret = nfs_revalidate_inode(server, inode);
2708 if (ret < 0)
2709 return ret;
2710 ret = nfs4_read_cached_acl(inode, buf, buflen);
2711 if (ret != -ENOENT)
2712 return ret;
2713 return nfs4_get_acl_uncached(inode, buf, buflen);
2714}
2715
16b4289c 2716static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2717{
2718 struct nfs_server *server = NFS_SERVER(inode);
2719 struct page *pages[NFS4ACL_MAXPAGES];
2720 struct nfs_setaclargs arg = {
2721 .fh = NFS_FH(inode),
2722 .acl_pages = pages,
2723 .acl_len = buflen,
2724 };
2725 struct rpc_message msg = {
2726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2727 .rpc_argp = &arg,
2728 .rpc_resp = NULL,
2729 };
2730 int ret;
2731
2732 if (!nfs4_server_supports_acls(server))
2733 return -EOPNOTSUPP;
642ac549 2734 nfs_inode_return_delegation(inode);
4b580ee3 2735 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
1f163415 2736 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
08efa202 2737 nfs_zap_caches(inode);
4b580ee3
BF		 2738 return ret;
2739}
2740
16b4289c
TM		 2741static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2742{
2743 struct nfs4_exception exception = { };
2744 int err;
2745 do {
2746 err = nfs4_handle_exception(NFS_SERVER(inode),
2747 __nfs4_proc_set_acl(inode, buf, buflen),
2748 &exception);
2749 } while (exception.retry);
2750 return err;
2751}
2752
1da177e4 2753static int
faf5f49c 2754nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
1da177e4 2755{
7539bbab 2756 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2757
2758 if (!clp || task->tk_status >= 0)
2759 return 0;
2760 switch(task->tk_status) {
2761 case -NFS4ERR_STALE_CLIENTID:
2762 case -NFS4ERR_STALE_STATEID:
2763 case -NFS4ERR_EXPIRED:
2764 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2765 nfs4_schedule_state_recovery(clp);
433fbe4c 2766 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
1da177e4
LT		 2767 rpc_wake_up_task(task);
2768 task->tk_status = 0;
2769 return -EAGAIN;
1da177e4 2770 case -NFS4ERR_DELAY:
006ea73e
CL		 2771 nfs_inc_server_stats((struct nfs_server *) server,
2772 NFSIOS_DELAY);
2773 case -NFS4ERR_GRACE:
1da177e4
LT		 2774 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2775 task->tk_status = 0;
2776 return -EAGAIN;
2777 case -NFS4ERR_OLD_STATEID:
2778 task->tk_status = 0;
2779 return -EAGAIN;
2780 }
2781 task->tk_status = nfs4_map_errors(task->tk_status);
2782 return 0;
2783}
2784
150030b7 2785static int nfs4_wait_bit_killable(void *word)
433fbe4c 2786{
150030b7 2787 if (fatal_signal_pending(current))
433fbe4c
TM		 2788 return -ERESTARTSYS;
2789 schedule();
2790 return 0;
2791}
2792
adfa6f98 2793static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
1da177e4 2794{
433fbe4c 2795 int res;
1da177e4
LT		 2796
2797 might_sleep();
2798
e148582e
TM		 2799 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2800
433fbe4c 2801 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
150030b7 2802 nfs4_wait_bit_killable, TASK_KILLABLE);
e148582e
TM		 2803
2804 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
1da177e4
LT		 2805 return res;
2806}
2807
2808static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2809{
1da177e4
LT		 2810 int res = 0;
2811
2812 might_sleep();
2813
2814 if (*timeout <= 0)
2815 *timeout = NFS4_POLL_RETRY_MIN;
2816 if (*timeout > NFS4_POLL_RETRY_MAX)
2817 *timeout = NFS4_POLL_RETRY_MAX;
150030b7
MW		 2818 schedule_timeout_killable(*timeout);
2819 if (fatal_signal_pending(current))
2820 res = -ERESTARTSYS;
1da177e4
LT		 2821 *timeout <<= 1;
2822 return res;
2823}
2824
2825/* This is the error handling routine for processes that are allowed
2826 * to sleep.
2827 */
10afec90 2828static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
1da177e4 2829{
7539bbab 2830 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 2831 int ret = errorcode;
2832
2833 exception->retry = 0;
2834 switch(errorcode) {
2835 case 0:
2836 return 0;
2837 case -NFS4ERR_STALE_CLIENTID:
2838 case -NFS4ERR_STALE_STATEID:
2839 case -NFS4ERR_EXPIRED:
433fbe4c 2840 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2841 ret = nfs4_wait_clnt_recover(server->client, clp);
2842 if (ret == 0)
2843 exception->retry = 1;
2844 break;
c514983d 2845 case -NFS4ERR_FILE_OPEN:
1da177e4
LT		 2846 case -NFS4ERR_GRACE:
2847 case -NFS4ERR_DELAY:
2848 ret = nfs4_delay(server->client, &exception->timeout);
2c56617d
TM		 2849 if (ret != 0)
2850 break;
1da177e4 2851 case -NFS4ERR_OLD_STATEID:
2c56617d 2852 exception->retry = 1;
1da177e4
LT		 2853 }
2854 /* We failed to handle the error */
2855 return nfs4_map_errors(ret);
2856}
2857
adfa6f98 2858int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 2859{
2860 nfs4_verifier sc_verifier;
2861 struct nfs4_setclientid setclientid = {
2862 .sc_verifier = &sc_verifier,
2863 .sc_prog = program,
2864 };
2865 struct rpc_message msg = {
2866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2867 .rpc_argp = &setclientid,
2868 .rpc_resp = clp,
286d7d6a 2869 .rpc_cred = cred,
1da177e4 2870 };
bc4785cd 2871 __be32 *p;
1da177e4
LT		 2872 int loop = 0;
2873 int status;
2874
bc4785cd 2875 p = (__be32*)sc_verifier.data;
1da177e4
LT		 2876 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2877 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2878
2879 for(;;) {
2880 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 2881 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 2882 clp->cl_ipaddr,
2883 rpc_peeraddr2str(clp->cl_rpcclient,
2884 RPC_DISPLAY_ADDR),
69dd716c
TM		 2885 rpc_peeraddr2str(clp->cl_rpcclient,
2886 RPC_DISPLAY_PROTO),
286d7d6a 2887 cred->cr_ops->cr_name,
1da177e4
LT		 2888 clp->cl_id_uniquifier);
2889 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 2890 sizeof(setclientid.sc_netid),
2891 rpc_peeraddr2str(clp->cl_rpcclient,
2892 RPC_DISPLAY_NETID));
1da177e4 2893 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 2894 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 2895 clp->cl_ipaddr, port >> 8, port & 255);
2896
2897 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2898 if (status != -NFS4ERR_CLID_INUSE)
2899 break;
2900 if (signalled())
2901 break;
2902 if (loop++ & 1)
2903 ssleep(clp->cl_lease_time + 1);
2904 else
2905 if (++clp->cl_id_uniquifier == 0)
2906 break;
2907 }
2908 return status;
2909}
2910
adfa6f98 2911static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2912{
2913 struct nfs_fsinfo fsinfo;
2914 struct rpc_message msg = {
2915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2916 .rpc_argp = clp,
2917 .rpc_resp = &fsinfo,
286d7d6a 2918 .rpc_cred = cred,
1da177e4
LT		 2919 };
2920 unsigned long now;
2921 int status;
2922
2923 now = jiffies;
2924 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2925 if (status == 0) {
2926 spin_lock(&clp->cl_lock);
2927 clp->cl_lease_time = fsinfo.lease_time * HZ;
2928 clp->cl_last_renewal = now;
58d9714a 2929 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
1da177e4
LT		 2930 spin_unlock(&clp->cl_lock);
2931 }
2932 return status;
2933}
2934
adfa6f98 2935int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b
TM		 2936{
2937 long timeout;
2938 int err;
2939 do {
2940 err = _nfs4_proc_setclientid_confirm(clp, cred);
2941 switch (err) {
2942 case 0:
2943 return err;
2944 case -NFS4ERR_RESOURCE:
2945 /* The IBM lawyers misread another document! */
2946 case -NFS4ERR_DELAY:
2947 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2948 }
2949 } while (err == 0);
2950 return err;
2951}
2952
fe650407
TM		 2953struct nfs4_delegreturndata {
2954 struct nfs4_delegreturnargs args;
fa178f29 2955 struct nfs4_delegreturnres res;
fe650407
TM		 2956 struct nfs_fh fh;
2957 nfs4_stateid stateid;
26e976a8 2958 unsigned long timestamp;
fa178f29 2959 struct nfs_fattr fattr;
fe650407
TM		 2960 int rpc_status;
2961};
2962
fe650407
TM		 2963static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2964{
2965 struct nfs4_delegreturndata *data = calldata;
2966 data->rpc_status = task->tk_status;
26e976a8 2967 if (data->rpc_status == 0)
fa178f29 2968 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 2969}
2970
2971static void nfs4_delegreturn_release(void *calldata)
2972{
fe650407
TM		 2973 kfree(calldata);
2974}
2975
c8d149f3 2976static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 2977 .rpc_call_done = nfs4_delegreturn_done,
2978 .rpc_release = nfs4_delegreturn_release,
2979};
2980
e6f81075 2981static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 2982{
2983 struct nfs4_delegreturndata *data;
fa178f29 2984 struct nfs_server *server = NFS_SERVER(inode);
fe650407 2985 struct rpc_task *task;
5138fde0
TM		 2986 struct rpc_message msg = {
2987 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2988 .rpc_cred = cred,
2989 };
c970aa85
TM		 2990 struct rpc_task_setup task_setup_data = {
2991 .rpc_client = server->client,
5138fde0 2992 .rpc_message = &msg,
c970aa85
TM		 2993 .callback_ops = &nfs4_delegreturn_ops,
2994 .flags = RPC_TASK_ASYNC,
2995 };
e6f81075 2996 int status = 0;
fe650407
TM		 2997
2998 data = kmalloc(sizeof(*data), GFP_KERNEL);
2999 if (data == NULL)
3000 return -ENOMEM;
3001 data->args.fhandle = &data->fh;
3002 data->args.stateid = &data->stateid;
fa178f29 3003 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3004 nfs_copy_fh(&data->fh, NFS_FH(inode));
3005 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3006 data->res.fattr = &data->fattr;
3007 data->res.server = server;
5138fde0 3008 nfs_fattr_init(data->res.fattr);
26e976a8 3009 data->timestamp = jiffies;
fe650407
TM		 3010 data->rpc_status = 0;
3011
c970aa85 3012 task_setup_data.callback_data = data;
5138fde0
TM		 3013 msg.rpc_argp = &data->args,
3014 msg.rpc_resp = &data->res,
c970aa85 3015 task = rpc_run_task(&task_setup_data);
7a1218a2 3016 if (IS_ERR(task))
fe650407 3017 return PTR_ERR(task);
e6f81075
TM		 3018 if (!issync)
3019 goto out;
fe650407 3020 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3021 if (status != 0)
3022 goto out;
3023 status = data->rpc_status;
3024 if (status != 0)
3025 goto out;
3026 nfs_refresh_inode(inode, &data->fattr);
3027out:
e6b3c4db 3028 rpc_put_task(task);
fe650407 3029 return status;
1da177e4
LT		 3030}
3031
e6f81075 3032int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3033{
3034 struct nfs_server *server = NFS_SERVER(inode);
3035 struct nfs4_exception exception = { };
3036 int err;
3037 do {
e6f81075 3038 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3039 switch (err) {
3040 case -NFS4ERR_STALE_STATEID:
3041 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3042 case 0:
3043 return 0;
3044 }
3045 err = nfs4_handle_exception(server, err, &exception);
3046 } while (exception.retry);
3047 return err;
3048}
3049
3050#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3051#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3052
3053/*
3054 * sleep, with exponential backoff, and retry the LOCK operation.
3055 */
3056static unsigned long
3057nfs4_set_lock_task_retry(unsigned long timeout)
3058{
150030b7 3059 schedule_timeout_killable(timeout);
1da177e4
LT		 3060 timeout <<= 1;
3061 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3062 return NFS4_LOCK_MAXTIMEOUT;
3063 return timeout;
3064}
3065
1da177e4
LT		 3066static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3067{
3068 struct inode *inode = state->inode;
3069 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3070 struct nfs_client *clp = server->nfs_client;
911d1aaf 3071 struct nfs_lockt_args arg = {
1da177e4 3072 .fh = NFS_FH(inode),
911d1aaf 3073 .fl = request,
1da177e4 3074 };
911d1aaf
TM		 3075 struct nfs_lockt_res res = {
3076 .denied = request,
1da177e4
LT		 3077 };
3078 struct rpc_message msg = {
3079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3080 .rpc_argp = &arg,
3081 .rpc_resp = &res,
3082 .rpc_cred = state->owner->so_cred,
3083 };
1da177e4
LT		 3084 struct nfs4_lock_state *lsp;
3085 int status;
3086
3087 down_read(&clp->cl_sem);
911d1aaf 3088 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3089 status = nfs4_set_lock_state(state, request);
3090 if (status != 0)
3091 goto out;
3092 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3093 arg.lock_owner.id = lsp->ls_id.id;
1da177e4 3094 status = rpc_call_sync(server->client, &msg, 0);
911d1aaf
TM		 3095 switch (status) {
3096 case 0:
3097 request->fl_type = F_UNLCK;
3098 break;
3099 case -NFS4ERR_DENIED:
3100 status = 0;
1da177e4 3101 }
70cc6487 3102 request->fl_ops->fl_release_private(request);
8d0a8a9d 3103out:
1da177e4
LT		 3104 up_read(&clp->cl_sem);
3105 return status;
3106}
3107
3108static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3109{
3110 struct nfs4_exception exception = { };
3111 int err;
3112
3113 do {
3114 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3115 _nfs4_proc_getlk(state, cmd, request),
3116 &exception);
3117 } while (exception.retry);
3118 return err;
3119}
3120
3121static int do_vfs_lock(struct file *file, struct file_lock *fl)
3122{
3123 int res = 0;
3124 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3125 case FL_POSIX:
3126 res = posix_lock_file_wait(file, fl);
3127 break;
3128 case FL_FLOCK:
3129 res = flock_lock_file_wait(file, fl);
3130 break;
3131 default:
3132 BUG();
3133 }
1da177e4
LT		 3134 return res;
3135}
3136
faf5f49c 3137struct nfs4_unlockdata {
911d1aaf
TM		 3138 struct nfs_locku_args arg;
3139 struct nfs_locku_res res;
faf5f49c
TM		 3140 struct nfs4_lock_state *lsp;
3141 struct nfs_open_context *ctx;
911d1aaf
TM		 3142 struct file_lock fl;
3143 const struct nfs_server *server;
26e976a8 3144 unsigned long timestamp;
faf5f49c
TM		 3145};
3146
911d1aaf
TM		 3147static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3148 struct nfs_open_context *ctx,
3149 struct nfs4_lock_state *lsp,
3150 struct nfs_seqid *seqid)
3151{
3152 struct nfs4_unlockdata *p;
3153 struct inode *inode = lsp->ls_state->inode;
3154
3155 p = kmalloc(sizeof(*p), GFP_KERNEL);
3156 if (p == NULL)
3157 return NULL;
3158 p->arg.fh = NFS_FH(inode);
3159 p->arg.fl = &p->fl;
3160 p->arg.seqid = seqid;
3161 p->arg.stateid = &lsp->ls_stateid;
3162 p->lsp = lsp;
3163 atomic_inc(&lsp->ls_count);
3164 /* Ensure we don't close file until we're done freeing locks! */
3165 p->ctx = get_nfs_open_context(ctx);
3166 memcpy(&p->fl, fl, sizeof(p->fl));
3167 p->server = NFS_SERVER(inode);
3168 return p;
3169}
3170
06f814a3 3171static void nfs4_locku_release_calldata(void *data)
faf5f49c 3172{
963d8fe5 3173 struct nfs4_unlockdata *calldata = data;
911d1aaf 3174 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3175 nfs4_put_lock_state(calldata->lsp);
3176 put_nfs_open_context(calldata->ctx);
3177 kfree(calldata);
faf5f49c
TM		 3178}
3179
963d8fe5 3180static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3181{
963d8fe5 3182 struct nfs4_unlockdata *calldata = data;
faf5f49c 3183
06f814a3
TM		 3184 if (RPC_ASSASSINATED(task))
3185 return;
911d1aaf 3186 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
faf5f49c
TM		 3187 switch (task->tk_status) {
3188 case 0:
3189 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3190 calldata->res.stateid.data,
faf5f49c 3191 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3192 renew_lease(calldata->server, calldata->timestamp);
faf5f49c
TM		 3193 break;
3194 case -NFS4ERR_STALE_STATEID:
3195 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3196 break;
3197 default:
a6a352e9 3198 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
faf5f49c 3199 rpc_restart_call(task);
faf5f49c 3200 }
faf5f49c
TM		 3201}
3202
4ce70ada 3203static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3204{
4ce70ada 3205 struct nfs4_unlockdata *calldata = data;
faf5f49c 3206
911d1aaf 3207 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3208 return;
3209 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3210 /* Note: exit _without_ running nfs4_locku_done */
3211 task->tk_action = NULL;
faf5f49c
TM		 3212 return;
3213 }
26e976a8 3214 calldata->timestamp = jiffies;
5138fde0 3215 rpc_call_start(task);
faf5f49c
TM		 3216}
3217
963d8fe5 3218static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3219 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3220 .rpc_call_done = nfs4_locku_done,
06f814a3 3221 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3222};
3223
a5d16a4d
TM		 3224static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3225 struct nfs_open_context *ctx,
3226 struct nfs4_lock_state *lsp,
3227 struct nfs_seqid *seqid)
3228{
3229 struct nfs4_unlockdata *data;
5138fde0
TM		 3230 struct rpc_message msg = {
3231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3232 .rpc_cred = ctx->cred,
3233 };
c970aa85
TM		 3234 struct rpc_task_setup task_setup_data = {
3235 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3236 .rpc_message = &msg,
c970aa85
TM		 3237 .callback_ops = &nfs4_locku_ops,
3238 .flags = RPC_TASK_ASYNC,
3239 };
a5d16a4d 3240
137d6aca
FF		 3241 /* Ensure this is an unlock - when canceling a lock, the
3242 * canceled lock is passed in, and it won't be an unlock.
3243 */
3244 fl->fl_type = F_UNLCK;
3245
a5d16a4d
TM		 3246 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3247 if (data == NULL) {
3248 nfs_free_seqid(seqid);
3249 return ERR_PTR(-ENOMEM);
3250 }
3251
5138fde0
TM		 3252 msg.rpc_argp = &data->arg,
3253 msg.rpc_resp = &data->res,
c970aa85
TM		 3254 task_setup_data.callback_data = data;
3255 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3256}
3257
faf5f49c
TM		 3258static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3259{
911d1aaf 3260 struct nfs_seqid *seqid;
1da177e4 3261 struct nfs4_lock_state *lsp;
06f814a3
TM		 3262 struct rpc_task *task;
3263 int status = 0;
faf5f49c 3264
8d0a8a9d 3265 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3266 /* Unlock _before_ we do the RPC call */
3267 request->fl_flags |= FL_EXISTS;
3268 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3269 goto out;
8d0a8a9d 3270 if (status != 0)
9b073574
TM		 3271 goto out;
3272 /* Is this a delegated lock? */
3273 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3274 goto out;
8d0a8a9d 3275 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3276 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3277 status = -ENOMEM;
911d1aaf 3278 if (seqid == NULL)
9b073574 3279 goto out;
cd3758e3 3280 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3281 status = PTR_ERR(task);
3282 if (IS_ERR(task))
9b073574 3283 goto out;
a5d16a4d 3284 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3285 rpc_put_task(task);
9b073574 3286out:
1da177e4
LT		 3287 return status;
3288}
3289
a5d16a4d
TM		 3290struct nfs4_lockdata {
3291 struct nfs_lock_args arg;
3292 struct nfs_lock_res res;
3293 struct nfs4_lock_state *lsp;
3294 struct nfs_open_context *ctx;
3295 struct file_lock fl;
26e976a8 3296 unsigned long timestamp;
a5d16a4d
TM		 3297 int rpc_status;
3298 int cancelled;
3299};
3300
3301static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3302 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3303{
a5d16a4d
TM		 3304 struct nfs4_lockdata *p;
3305 struct inode *inode = lsp->ls_state->inode;
1da177e4 3306 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3307
3308 p = kzalloc(sizeof(*p), GFP_KERNEL);
3309 if (p == NULL)
3310 return NULL;
3311
3312 p->arg.fh = NFS_FH(inode);
3313 p->arg.fl = &p->fl;
2f74c0a0
TM		 3314 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3315 if (p->arg.open_seqid == NULL)
3316 goto out_free;
a5d16a4d
TM		 3317 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3318 if (p->arg.lock_seqid == NULL)
2f74c0a0 3319 goto out_free_seqid;
a5d16a4d 3320 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3321 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3322 p->arg.lock_owner.id = lsp->ls_id.id;
a5d16a4d
TM		 3323 p->lsp = lsp;
3324 atomic_inc(&lsp->ls_count);
3325 p->ctx = get_nfs_open_context(ctx);
3326 memcpy(&p->fl, fl, sizeof(p->fl));
3327 return p;
2f74c0a0
TM		 3328out_free_seqid:
3329 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 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;
06735b34 3339
a5d16a4d 3340 dprintk("%s: begin!\n", __FUNCTION__);
2f74c0a0
TM		 3341 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3342 return;
a5d16a4d
TM		 3343 /* Do we need to do an open_to_lock_owner? */
3344 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3345 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3346 return;
a5d16a4d
TM		 3347 data->arg.open_stateid = &state->stateid;
3348 data->arg.new_lock_owner = 1;
2f74c0a0
TM		 3349 } else
3350 data->arg.new_lock_owner = 0;
26e976a8 3351 data->timestamp = jiffies;
5138fde0 3352 rpc_call_start(task);
a5d16a4d
TM		 3353 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3354}
3355
3356static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3357{
3358 struct nfs4_lockdata *data = calldata;
3359
3360 dprintk("%s: begin!\n", __FUNCTION__);
3361
3362 data->rpc_status = task->tk_status;
3363 if (RPC_ASSASSINATED(task))
3364 goto out;
3365 if (data->arg.new_lock_owner != 0) {
3366 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3367 if (data->rpc_status == 0)
3368 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3369 else
3370 goto out;
3371 }
3372 if (data->rpc_status == 0) {
3373 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3374 sizeof(data->lsp->ls_stateid.data));
3375 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3376 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d
TM		 3377 }
3378 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3379out:
3380 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3381}
3382
3383static void nfs4_lock_release(void *calldata)
3384{
3385 struct nfs4_lockdata *data = calldata;
3386
3387 dprintk("%s: begin!\n", __FUNCTION__);
2f74c0a0 3388 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3389 if (data->cancelled != 0) {
3390 struct rpc_task *task;
3391 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3392 data->arg.lock_seqid);
3393 if (!IS_ERR(task))
e6b3c4db 3394 rpc_put_task(task);
a5d16a4d
TM		 3395 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3396 } else
3397 nfs_free_seqid(data->arg.lock_seqid);
3398 nfs4_put_lock_state(data->lsp);
3399 put_nfs_open_context(data->ctx);
3400 kfree(data);
3401 dprintk("%s: done!\n", __FUNCTION__);
3402}
3403
3404static const struct rpc_call_ops nfs4_lock_ops = {
3405 .rpc_call_prepare = nfs4_lock_prepare,
3406 .rpc_call_done = nfs4_lock_done,
3407 .rpc_release = nfs4_lock_release,
3408};
3409
3410static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3411{
3412 struct nfs4_lockdata *data;
3413 struct rpc_task *task;
5138fde0
TM		 3414 struct rpc_message msg = {
3415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3416 .rpc_cred = state->owner->so_cred,
3417 };
c970aa85
TM		 3418 struct rpc_task_setup task_setup_data = {
3419 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3420 .rpc_message = &msg,
c970aa85
TM		 3421 .callback_ops = &nfs4_lock_ops,
3422 .flags = RPC_TASK_ASYNC,
3423 };
a5d16a4d
TM		 3424 int ret;
3425
3426 dprintk("%s: begin!\n", __FUNCTION__);
cd3758e3 3427 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3428 fl->fl_u.nfs4_fl.owner);
3429 if (data == NULL)
3430 return -ENOMEM;
3431 if (IS_SETLKW(cmd))
3432 data->arg.block = 1;
3433 if (reclaim != 0)
3434 data->arg.reclaim = 1;
5138fde0
TM		 3435 msg.rpc_argp = &data->arg,
3436 msg.rpc_resp = &data->res,
c970aa85
TM		 3437 task_setup_data.callback_data = data;
3438 task = rpc_run_task(&task_setup_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
4b580ee3 3611 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3612}
3613
3614/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3615 * and that's what we'll do for e.g. user attributes that haven't been set.
3616 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3617 * attributes in kernel-managed attribute namespaces. */
3618ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3619 size_t buflen)
3620{
aa1870af
BF		 3621 struct inode *inode = dentry->d_inode;
3622
3623 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3624 return -EOPNOTSUPP;
3625
3626 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3627}
3628
3629ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3630{
aa1870af 3631 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3632
096455a2
BF		 3633 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3634 return 0;
6b3b5496
BF		 3635 if (buf && buflen < len)
3636 return -ERANGE;
3637 if (buf)
aa1870af
BF		 3638 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3639 return len;
6b3b5496
BF		 3640}
3641
56659e99 3642int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3643 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3644{
3645 struct nfs_server *server = NFS_SERVER(dir);
3646 u32 bitmask[2] = {
361e624f
MN		 3647 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3648 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3649 };
3650 struct nfs4_fs_locations_arg args = {
3651 .dir_fh = NFS_FH(dir),
c228fd3a 3652 .name = name,
683b57b4
TM		 3653 .page = page,
3654 .bitmask = bitmask,
3655 };
3656 struct rpc_message msg = {
3657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3658 .rpc_argp = &args,
7aaa0b3b 3659 .rpc_resp = fs_locations,
683b57b4
TM		 3660 };
3661 int status;
3662
3663 dprintk("%s: start\n", __FUNCTION__);
c228fd3a 3664 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3665 fs_locations->server = server;
830b8e33 3666 fs_locations->nlocations = 0;
683b57b4
TM		 3667 status = rpc_call_sync(server->client, &msg, 0);
3668 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3669 return status;
3670}
3671
1da177e4
LT		 3672struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3673 .recover_open = nfs4_open_reclaim,
3674 .recover_lock = nfs4_lock_reclaim,
3675};
3676
3677struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3678 .recover_open = nfs4_open_expired,
3679 .recover_lock = nfs4_lock_expired,
3680};
3681
92e1d5be 3682static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3683 .permission = nfs_permission,
3684 .getattr = nfs_getattr,
3685 .setattr = nfs_setattr,
3686 .getxattr = nfs4_getxattr,
3687 .setxattr = nfs4_setxattr,
3688 .listxattr = nfs4_listxattr,
3689};
3690
509de811 3691const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3692 .version = 4, /* protocol version */
3693 .dentry_ops = &nfs4_dentry_operations,
3694 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3695 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3696 .getroot = nfs4_proc_get_root,
3697 .getattr = nfs4_proc_getattr,
3698 .setattr = nfs4_proc_setattr,
2b3de441 3699 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3700 .lookup = nfs4_proc_lookup,
3701 .access = nfs4_proc_access,
3702 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3703 .create = nfs4_proc_create,
3704 .remove = nfs4_proc_remove,
3705 .unlink_setup = nfs4_proc_unlink_setup,
3706 .unlink_done = nfs4_proc_unlink_done,
3707 .rename = nfs4_proc_rename,
3708 .link = nfs4_proc_link,
3709 .symlink = nfs4_proc_symlink,
3710 .mkdir = nfs4_proc_mkdir,
3711 .rmdir = nfs4_proc_remove,
3712 .readdir = nfs4_proc_readdir,
3713 .mknod = nfs4_proc_mknod,
3714 .statfs = nfs4_proc_statfs,
3715 .fsinfo = nfs4_proc_fsinfo,
3716 .pathconf = nfs4_proc_pathconf,
e9326dca 3717 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3718 .decode_dirent = nfs4_decode_dirent,
3719 .read_setup = nfs4_proc_read_setup,
ec06c096 3720 .read_done = nfs4_read_done,
1da177e4 3721 .write_setup = nfs4_proc_write_setup,
788e7a89 3722 .write_done = nfs4_write_done,
1da177e4 3723 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3724 .commit_done = nfs4_commit_done,
02a913a7
TM		 3725 .file_open = nfs_open,
3726 .file_release = nfs_release,
1da177e4 3727 .lock = nfs4_proc_lock,
e50a1c2e 3728 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3729};
3730
3731/*
3732 * Local variables:
3733 * c-basic-offset: 8
3734 * End:
3735 */
Linux 6.x block layer and io_uring tree(s)