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nfs41: nfs4_setup_sequence
[mirror_ubuntu-bionic-kernel.git] / fs / nfs / nfs4proc.c
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1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
101070ca 54#include "internal.h"
006ea73e 55#include "iostat.h"
1da177e4
LT		 56
57#define NFSDBG_FACILITY NFSDBG_PROC
58
2066fe89 59#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 60#define NFS4_POLL_RETRY_MAX (15*HZ)
61
cdd4e68b 62struct nfs4_opendata;
864472e9 63static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 64static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 65static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 66static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
67static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 68
1da177e4 69/* Prevent leaks of NFSv4 errors into userland */
46f72f57 70static int nfs4_map_errors(int err)
1da177e4
LT		 71{
72 if (err < -1000) {
73 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 74 __func__, -err);
1da177e4
LT		 75 return -EIO;
76 }
77 return err;
78}
79
80/*
81 * This is our standard bitmap for GETATTR requests.
82 */
83const u32 nfs4_fattr_bitmap[2] = {
84 FATTR4_WORD0_TYPE
85 | FATTR4_WORD0_CHANGE
86 | FATTR4_WORD0_SIZE
87 | FATTR4_WORD0_FSID
88 | FATTR4_WORD0_FILEID,
89 FATTR4_WORD1_MODE
90 | FATTR4_WORD1_NUMLINKS
91 | FATTR4_WORD1_OWNER
92 | FATTR4_WORD1_OWNER_GROUP
93 | FATTR4_WORD1_RAWDEV
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
98};
99
100const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
107};
108
4ce79717 109const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 110 FATTR4_WORD0_MAXLINK
111 | FATTR4_WORD0_MAXNAME,
112 0
113};
114
115const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
119 0
120};
121
830b8e33
MN		 122const u32 nfs4_fs_locations_bitmap[2] = {
123 FATTR4_WORD0_TYPE
124 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_SIZE
126 | FATTR4_WORD0_FSID
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
139};
140
bc4785cd 141static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 142 struct nfs4_readdir_arg *readdir)
143{
0dbb4c67 144 __be32 *start, *p;
1da177e4
LT		 145
146 BUG_ON(readdir->count < 80);
147 if (cookie > 2) {
b7ef1956 148 readdir->cookie = cookie;
1da177e4
LT		 149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
150 return;
151 }
152
153 readdir->cookie = 0;
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
155 if (cookie == 2)
156 return;
157
158 /*
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
163 * instead of 1 or 2.
164 */
0dbb4c67 165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 166
167 if (cookie == 0) {
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
173 p++;
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
4e769b93 177 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 178 }
179
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
185 p++;
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
4e769b93 189 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 190
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
194}
195
65de872e
TM		 196static int nfs4_wait_clnt_recover(struct nfs_client *clp)
197{
198 int res;
199
200 might_sleep();
201
e005e804 202 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 203 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 204 return res;
205}
206
207static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
208{
209 int res = 0;
210
211 might_sleep();
212
213 if (*timeout <= 0)
214 *timeout = NFS4_POLL_RETRY_MIN;
215 if (*timeout > NFS4_POLL_RETRY_MAX)
216 *timeout = NFS4_POLL_RETRY_MAX;
217 schedule_timeout_killable(*timeout);
218 if (fatal_signal_pending(current))
219 res = -ERESTARTSYS;
220 *timeout <<= 1;
221 return res;
222}
223
224/* This is the error handling routine for processes that are allowed
225 * to sleep.
226 */
227static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
228{
229 struct nfs_client *clp = server->nfs_client;
9e33bed5 230 struct nfs4_state *state = exception->state;
65de872e
TM		 231 int ret = errorcode;
232
233 exception->retry = 0;
234 switch(errorcode) {
235 case 0:
236 return 0;
9e33bed5
TM		 237 case -NFS4ERR_ADMIN_REVOKED:
238 case -NFS4ERR_BAD_STATEID:
239 case -NFS4ERR_OPENMODE:
240 if (state == NULL)
241 break;
242 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 243 case -NFS4ERR_STALE_CLIENTID:
244 case -NFS4ERR_STALE_STATEID:
245 case -NFS4ERR_EXPIRED:
246 nfs4_schedule_state_recovery(clp);
247 ret = nfs4_wait_clnt_recover(clp);
248 if (ret == 0)
249 exception->retry = 1;
250 break;
251 case -NFS4ERR_FILE_OPEN:
252 case -NFS4ERR_GRACE:
253 case -NFS4ERR_DELAY:
254 ret = nfs4_delay(server->client, &exception->timeout);
255 if (ret != 0)
256 break;
257 case -NFS4ERR_OLD_STATEID:
258 exception->retry = 1;
259 }
260 /* We failed to handle the error */
261 return nfs4_map_errors(ret);
262}
263
264
26e976a8 265static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 266{
7539bbab 267 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 268 spin_lock(&clp->cl_lock);
269 if (time_before(clp->cl_last_renewal,timestamp))
270 clp->cl_last_renewal = timestamp;
271 spin_unlock(&clp->cl_lock);
272}
273
cccef3b9
AA		 274#if defined(CONFIG_NFS_V4_1)
275
ce5039c1
AA		 276static int nfs41_setup_sequence(struct nfs4_session *session,
277 struct nfs4_sequence_args *args,
278 struct nfs4_sequence_res *res,
279 int cache_reply,
280 struct rpc_task *task)
281{
282 /* slot already allocated? */
283 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
284 return 0;
285
286 memset(res, 0, sizeof(*res));
287 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
288 return 0;
289}
290
291int nfs4_setup_sequence(struct nfs_client *clp,
292 struct nfs4_sequence_args *args,
293 struct nfs4_sequence_res *res,
294 int cache_reply,
295 struct rpc_task *task)
296{
297 int ret = 0;
298
299 dprintk("--> %s clp %p session %p sr_slotid %d\n",
300 __func__, clp, clp->cl_session, res->sr_slotid);
301
302 if (!nfs4_has_session(clp))
303 goto out;
304 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
305 task);
306 if (ret != -EAGAIN) {
307 /* terminate rpc task */
308 task->tk_status = ret;
309 task->tk_action = NULL;
310 }
311out:
312 dprintk("<-- %s status=%d\n", __func__, ret);
313 return ret;
314}
315
316struct nfs41_call_sync_data {
317 struct nfs_client *clp;
318 struct nfs4_sequence_args *seq_args;
319 struct nfs4_sequence_res *seq_res;
320 int cache_reply;
321};
322
323static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
324{
325 struct nfs41_call_sync_data *data = calldata;
326
327 dprintk("--> %s data->clp->cl_session %p\n", __func__,
328 data->clp->cl_session);
329 if (nfs4_setup_sequence(data->clp, data->seq_args,
330 data->seq_res, data->cache_reply, task))
331 return;
332 rpc_call_start(task);
333}
334
335struct rpc_call_ops nfs41_call_sync_ops = {
336 .rpc_call_prepare = nfs41_call_sync_prepare,
337};
338
339static int nfs4_call_sync_sequence(struct nfs_client *clp,
340 struct rpc_clnt *clnt,
341 struct rpc_message *msg,
342 struct nfs4_sequence_args *args,
343 struct nfs4_sequence_res *res,
344 int cache_reply)
345{
346 int ret;
347 struct rpc_task *task;
348 struct nfs41_call_sync_data data = {
349 .clp = clp,
350 .seq_args = args,
351 .seq_res = res,
352 .cache_reply = cache_reply,
353 };
354 struct rpc_task_setup task_setup = {
355 .rpc_client = clnt,
356 .rpc_message = msg,
357 .callback_ops = &nfs41_call_sync_ops,
358 .callback_data = &data
359 };
360
361 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
362 task = rpc_run_task(&task_setup);
363 if (IS_ERR(task))
364 ret = PTR_ERR(task);
365 else {
366 ret = task->tk_status;
367 rpc_put_task(task);
368 }
369 return ret;
370}
371
cccef3b9
AA		 372int _nfs4_call_sync_session(struct nfs_server *server,
373 struct rpc_message *msg,
374 struct nfs4_sequence_args *args,
375 struct nfs4_sequence_res *res,
376 int cache_reply)
377{
ce5039c1
AA		 378 return nfs4_call_sync_sequence(server->nfs_client, server->client,
379 msg, args, res, cache_reply);
cccef3b9
AA		 380}
381
382#endif /* CONFIG_NFS_V4_1 */
383
384int _nfs4_call_sync(struct nfs_server *server,
385 struct rpc_message *msg,
386 struct nfs4_sequence_args *args,
387 struct nfs4_sequence_res *res,
388 int cache_reply)
389{
f3752975 390 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 391 return rpc_call_sync(server->client, msg, 0);
392}
393
394#define nfs4_call_sync(server, msg, args, res, cache_reply) \
395 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
396 &(res)->seq_res, (cache_reply))
397
38478b24 398static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 399{
38478b24 400 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 401
38478b24 402 spin_lock(&dir->i_lock);
40d24704
TM		 403 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
404 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 405 nfs_force_lookup_revalidate(dir);
40d24704 406 nfsi->change_attr = cinfo->after;
38478b24 407 spin_unlock(&dir->i_lock);
1da177e4
LT		 408}
409
e56e0b78 410struct nfs4_opendata {
c6d00e63 411 struct kref kref;
e56e0b78
TM		 412 struct nfs_openargs o_arg;
413 struct nfs_openres o_res;
cdd4e68b
TM		 414 struct nfs_open_confirmargs c_arg;
415 struct nfs_open_confirmres c_res;
e56e0b78
TM		 416 struct nfs_fattr f_attr;
417 struct nfs_fattr dir_attr;
ad389da7 418 struct path path;
e56e0b78
TM		 419 struct dentry *dir;
420 struct nfs4_state_owner *owner;
aac00a8d 421 struct nfs4_state *state;
e56e0b78 422 struct iattr attrs;
26e976a8 423 unsigned long timestamp;
3e309914 424 unsigned int rpc_done : 1;
24ac23ab
TM		 425 int rpc_status;
426 int cancelled;
e56e0b78
TM		 427};
428
2ced46c2
TM		 429
430static void nfs4_init_opendata_res(struct nfs4_opendata *p)
431{
432 p->o_res.f_attr = &p->f_attr;
433 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 434 p->o_res.seqid = p->o_arg.seqid;
435 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 436 p->o_res.server = p->o_arg.server;
437 nfs_fattr_init(&p->f_attr);
438 nfs_fattr_init(&p->dir_attr);
439}
440
ad389da7 441static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 442 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 443 const struct iattr *attrs)
444{
ad389da7 445 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 446 struct inode *dir = parent->d_inode;
447 struct nfs_server *server = NFS_SERVER(dir);
448 struct nfs4_opendata *p;
449
450 p = kzalloc(sizeof(*p), GFP_KERNEL);
451 if (p == NULL)
452 goto err;
453 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
454 if (p->o_arg.seqid == NULL)
455 goto err_free;
ad389da7
TM		 456 p->path.mnt = mntget(path->mnt);
457 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 458 p->dir = parent;
459 p->owner = sp;
460 atomic_inc(&sp->so_count);
461 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 462 p->o_arg.open_flags = flags;
463 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 464 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 465 p->o_arg.id = sp->so_owner_id.id;
ad389da7 466 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 467 p->o_arg.server = server;
468 p->o_arg.bitmask = server->attr_bitmask;
469 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
5f7dbd5c 470 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
e56e0b78
TM		 471 if (flags & O_EXCL) {
472 u32 *s = (u32 *) p->o_arg.u.verifier.data;
473 s[0] = jiffies;
474 s[1] = current->pid;
475 } else if (flags & O_CREAT) {
476 p->o_arg.u.attrs = &p->attrs;
477 memcpy(&p->attrs, attrs, sizeof(p->attrs));
478 }
cdd4e68b
TM		 479 p->c_arg.fh = &p->o_res.fh;
480 p->c_arg.stateid = &p->o_res.stateid;
481 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 482 nfs4_init_opendata_res(p);
c6d00e63 483 kref_init(&p->kref);
e56e0b78
TM		 484 return p;
485err_free:
486 kfree(p);
487err:
488 dput(parent);
489 return NULL;
490}
491
c6d00e63 492static void nfs4_opendata_free(struct kref *kref)
e56e0b78 493{
c6d00e63
TM		 494 struct nfs4_opendata *p = container_of(kref,
495 struct nfs4_opendata, kref);
496
497 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 498 if (p->state != NULL)
499 nfs4_put_open_state(p->state);
c6d00e63
TM		 500 nfs4_put_state_owner(p->owner);
501 dput(p->dir);
31f31db1 502 path_put(&p->path);
c6d00e63
TM		 503 kfree(p);
504}
505
506static void nfs4_opendata_put(struct nfs4_opendata *p)
507{
508 if (p != NULL)
509 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 510}
511
06f814a3
TM		 512static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
513{
06f814a3
TM		 514 int ret;
515
06f814a3 516 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 517 return ret;
518}
519
dc0b027d 520static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 521{
522 int ret = 0;
dc0b027d
TM		 523
524 if (open_mode & O_EXCL)
525 goto out;
526 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 527 case FMODE_READ:
528 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 529 break;
530 case FMODE_WRITE:
531 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 532 break;
533 case FMODE_READ|FMODE_WRITE:
534 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
535 }
dc0b027d 536out:
6ee41268
TM		 537 return ret;
538}
539
dc0b027d 540static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 541{
dc0b027d 542 if ((delegation->type & fmode) != fmode)
aac00a8d 543 return 0;
15c831bf 544 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 545 return 0;
b7391f44 546 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 547 return 1;
548}
549
dc0b027d 550static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 551{
dc0b027d 552 switch (fmode) {
e7616923
TM		 553 case FMODE_WRITE:
554 state->n_wronly++;
555 break;
556 case FMODE_READ:
557 state->n_rdonly++;
558 break;
559 case FMODE_READ|FMODE_WRITE:
560 state->n_rdwr++;
561 }
dc0b027d 562 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 563}
564
dc0b027d 565static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 566{
567 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
568 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
569 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 570 switch (fmode) {
003707c7
TM		 571 case FMODE_READ:
572 set_bit(NFS_O_RDONLY_STATE, &state->flags);
573 break;
574 case FMODE_WRITE:
575 set_bit(NFS_O_WRONLY_STATE, &state->flags);
576 break;
577 case FMODE_READ|FMODE_WRITE:
578 set_bit(NFS_O_RDWR_STATE, &state->flags);
579 }
e7616923
TM		 580}
581
dc0b027d 582static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 583{
8bda4e4c 584 write_seqlock(&state->seqlock);
dc0b027d 585 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 586 write_sequnlock(&state->seqlock);
003707c7
TM		 587}
588
dc0b027d 589static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 590{
8bda4e4c
TM		 591 /*
592 * Protect the call to nfs4_state_set_mode_locked and
593 * serialise the stateid update
594 */
595 write_seqlock(&state->seqlock);
003707c7
TM		 596 if (deleg_stateid != NULL) {
597 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
598 set_bit(NFS_DELEGATED_STATE, &state->flags);
599 }
600 if (open_stateid != NULL)
dc0b027d 601 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 602 write_sequnlock(&state->seqlock);
603 spin_lock(&state->owner->so_lock);
dc0b027d 604 update_open_stateflags(state, fmode);
ec073428 605 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 606}
607
dc0b027d 608static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 609{
610 struct nfs_inode *nfsi = NFS_I(state->inode);
611 struct nfs_delegation *deleg_cur;
612 int ret = 0;
613
dc0b027d 614 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 615
616 rcu_read_lock();
617 deleg_cur = rcu_dereference(nfsi->delegation);
618 if (deleg_cur == NULL)
619 goto no_delegation;
620
621 spin_lock(&deleg_cur->lock);
622 if (nfsi->delegation != deleg_cur ||
dc0b027d 623 (deleg_cur->type & fmode) != fmode)
34310430
TM		 624 goto no_delegation_unlock;
625
626 if (delegation == NULL)
627 delegation = &deleg_cur->stateid;
628 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
629 goto no_delegation_unlock;
630
b7391f44 631 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 632 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 633 ret = 1;
634no_delegation_unlock:
635 spin_unlock(&deleg_cur->lock);
636no_delegation:
637 rcu_read_unlock();
638
639 if (!ret && open_stateid != NULL) {
dc0b027d 640 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 641 ret = 1;
642 }
643
644 return ret;
645}
646
647
dc0b027d 648static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 649{
650 struct nfs_delegation *delegation;
651
652 rcu_read_lock();
653 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 654 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 655 rcu_read_unlock();
656 return;
657 }
658 rcu_read_unlock();
659 nfs_inode_return_delegation(inode);
660}
661
6ee41268 662static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 663{
664 struct nfs4_state *state = opendata->state;
665 struct nfs_inode *nfsi = NFS_I(state->inode);
666 struct nfs_delegation *delegation;
dc0b027d
TM		 667 int open_mode = opendata->o_arg.open_flags & O_EXCL;
668 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 669 nfs4_stateid stateid;
670 int ret = -EAGAIN;
671
aac00a8d 672 for (;;) {
dc0b027d 673 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 674 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 675 if (can_open_cached(state, fmode, open_mode)) {
676 update_open_stateflags(state, fmode);
6ee41268 677 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 678 goto out_return_state;
679 }
680 spin_unlock(&state->owner->so_lock);
681 }
34310430
TM		 682 rcu_read_lock();
683 delegation = rcu_dereference(nfsi->delegation);
684 if (delegation == NULL ||
dc0b027d 685 !can_open_delegated(delegation, fmode)) {
34310430 686 rcu_read_unlock();
aac00a8d 687 break;
34310430 688 }
aac00a8d
TM		 689 /* Save the delegation */
690 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
691 rcu_read_unlock();
af22f94a 692 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 693 if (ret != 0)
694 goto out;
695 ret = -EAGAIN;
34310430
TM		 696
697 /* Try to update the stateid using the delegation */
dc0b027d 698 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 699 goto out_return_state;
aac00a8d 700 }
aac00a8d
TM		 701out:
702 return ERR_PTR(ret);
703out_return_state:
704 atomic_inc(&state->count);
705 return state;
706}
707
24ac23ab
TM		 708static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
709{
710 struct inode *inode;
711 struct nfs4_state *state = NULL;
003707c7 712 struct nfs_delegation *delegation;
1b370bc2 713 int ret;
24ac23ab 714
aac00a8d 715 if (!data->rpc_done) {
6ee41268 716 state = nfs4_try_open_cached(data);
aac00a8d
TM		 717 goto out;
718 }
719
1b370bc2 720 ret = -EAGAIN;
24ac23ab 721 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 722 goto err;
24ac23ab 723 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 724 ret = PTR_ERR(inode);
03f28e3a 725 if (IS_ERR(inode))
1b370bc2
TM		 726 goto err;
727 ret = -ENOMEM;
24ac23ab
TM		 728 state = nfs4_get_open_state(inode, data->owner);
729 if (state == NULL)
1b370bc2 730 goto err_put_inode;
549d6ed5 731 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 732 int delegation_flags = 0;
733
003707c7
TM		 734 rcu_read_lock();
735 delegation = rcu_dereference(NFS_I(inode)->delegation);
736 if (delegation)
737 delegation_flags = delegation->flags;
738 rcu_read_unlock();
15c831bf 739 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 740 nfs_inode_set_delegation(state->inode,
741 data->owner->so_cred,
742 &data->o_res);
743 else
744 nfs_inode_reclaim_delegation(state->inode,
745 data->owner->so_cred,
746 &data->o_res);
747 }
34310430
TM		 748
749 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 750 data->o_arg.fmode);
24ac23ab 751 iput(inode);
aac00a8d 752out:
24ac23ab 753 return state;
1b370bc2
TM		 754err_put_inode:
755 iput(inode);
756err:
757 return ERR_PTR(ret);
24ac23ab
TM		 758}
759
864472e9
TM		 760static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
761{
762 struct nfs_inode *nfsi = NFS_I(state->inode);
763 struct nfs_open_context *ctx;
764
765 spin_lock(&state->inode->i_lock);
766 list_for_each_entry(ctx, &nfsi->open_files, list) {
767 if (ctx->state != state)
768 continue;
769 get_nfs_open_context(ctx);
770 spin_unlock(&state->inode->i_lock);
771 return ctx;
772 }
773 spin_unlock(&state->inode->i_lock);
774 return ERR_PTR(-ENOENT);
775}
776
6f220ed5
TM		 777static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
778{
779 struct nfs4_opendata *opendata;
780
dc0b027d 781 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 782 if (opendata == NULL)
783 return ERR_PTR(-ENOMEM);
784 opendata->state = state;
785 atomic_inc(&state->count);
786 return opendata;
787}
788
dc0b027d 789static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 790{
2ced46c2 791 struct nfs4_state *newstate;
864472e9
TM		 792 int ret;
793
dc0b027d
TM		 794 opendata->o_arg.open_flags = 0;
795 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 796 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
797 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
798 nfs4_init_opendata_res(opendata);
864472e9
TM		 799 ret = _nfs4_proc_open(opendata);
800 if (ret != 0)
801 return ret;
2ced46c2 802 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 803 if (IS_ERR(newstate))
804 return PTR_ERR(newstate);
dc0b027d 805 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 806 *res = newstate;
864472e9
TM		 807 return 0;
808}
809
810static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
811{
864472e9 812 struct nfs4_state *newstate;
864472e9
TM		 813 int ret;
814
815 /* memory barrier prior to reading state->n_* */
2ced46c2 816 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 817 smp_rmb();
818 if (state->n_rdwr != 0) {
2ced46c2 819 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 820 if (ret != 0)
821 return ret;
2ced46c2
TM		 822 if (newstate != state)
823 return -ESTALE;
864472e9
TM		 824 }
825 if (state->n_wronly != 0) {
2ced46c2 826 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 827 if (ret != 0)
828 return ret;
2ced46c2
TM		 829 if (newstate != state)
830 return -ESTALE;
864472e9
TM		 831 }
832 if (state->n_rdonly != 0) {
2ced46c2 833 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 834 if (ret != 0)
835 return ret;
2ced46c2
TM		 836 if (newstate != state)
837 return -ESTALE;
864472e9 838 }
1ac7e2fd
TM		 839 /*
840 * We may have performed cached opens for all three recoveries.
841 * Check if we need to update the current stateid.
842 */
843 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
844 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 845 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 846 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
847 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 848 write_sequnlock(&state->seqlock);
1ac7e2fd 849 }
864472e9
TM		 850 return 0;
851}
852
1da177e4
LT		 853/*
854 * OPEN_RECLAIM:
855 * reclaim state on the server after a reboot.
1da177e4 856 */
539cd03a 857static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 858{
1ac7e2fd 859 struct nfs_delegation *delegation;
864472e9 860 struct nfs4_opendata *opendata;
dc0b027d 861 fmode_t delegation_type = 0;
1da177e4
LT		 862 int status;
863
6f220ed5
TM		 864 opendata = nfs4_open_recoverdata_alloc(ctx, state);
865 if (IS_ERR(opendata))
866 return PTR_ERR(opendata);
864472e9
TM		 867 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
868 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 869 rcu_read_lock();
870 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 871 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 872 delegation_type = delegation->type;
1ac7e2fd 873 rcu_read_unlock();
864472e9
TM		 874 opendata->o_arg.u.delegation_type = delegation_type;
875 status = nfs4_open_recover(opendata, state);
c6d00e63 876 nfs4_opendata_put(opendata);
1da177e4
LT		 877 return status;
878}
879
539cd03a 880static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 881{
882 struct nfs_server *server = NFS_SERVER(state->inode);
883 struct nfs4_exception exception = { };
884 int err;
885 do {
539cd03a 886 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 887 if (err != -NFS4ERR_DELAY)
888 break;
889 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 890 } while (exception.retry);
891 return err;
892}
893
864472e9
TM		 894static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
895{
896 struct nfs_open_context *ctx;
897 int ret;
898
899 ctx = nfs4_state_find_open_context(state);
900 if (IS_ERR(ctx))
901 return PTR_ERR(ctx);
539cd03a 902 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 903 put_nfs_open_context(ctx);
904 return ret;
905}
906
13437e12 907static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 908{
e56e0b78 909 struct nfs4_opendata *opendata;
864472e9 910 int ret;
1da177e4 911
6f220ed5
TM		 912 opendata = nfs4_open_recoverdata_alloc(ctx, state);
913 if (IS_ERR(opendata))
914 return PTR_ERR(opendata);
e56e0b78 915 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 916 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 917 sizeof(opendata->o_arg.u.delegation.data));
864472e9 918 ret = nfs4_open_recover(opendata, state);
c6d00e63 919 nfs4_opendata_put(opendata);
864472e9 920 return ret;
1da177e4
LT		 921}
922
13437e12 923int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 924{
925 struct nfs4_exception exception = { };
539cd03a 926 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 927 int err;
928 do {
13437e12 929 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 930 switch (err) {
931 case 0:
932 return err;
933 case -NFS4ERR_STALE_CLIENTID:
934 case -NFS4ERR_STALE_STATEID:
935 case -NFS4ERR_EXPIRED:
936 /* Don't recall a delegation if it was lost */
7539bbab 937 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 938 return err;
939 }
940 err = nfs4_handle_exception(server, err, &exception);
941 } while (exception.retry);
942 return err;
943}
944
cdd4e68b
TM		 945static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
946{
947 struct nfs4_opendata *data = calldata;
948
949 data->rpc_status = task->tk_status;
950 if (RPC_ASSASSINATED(task))
951 return;
26e976a8 952 if (data->rpc_status == 0) {
cdd4e68b
TM		 953 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
954 sizeof(data->o_res.stateid.data));
bb22629e 955 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 956 renew_lease(data->o_res.server, data->timestamp);
3e309914 957 data->rpc_done = 1;
26e976a8 958 }
cdd4e68b
TM		 959}
960
961static void nfs4_open_confirm_release(void *calldata)
962{
963 struct nfs4_opendata *data = calldata;
964 struct nfs4_state *state = NULL;
965
966 /* If this request hasn't been cancelled, do nothing */
967 if (data->cancelled == 0)
968 goto out_free;
969 /* In case of error, no cleanup! */
3e309914 970 if (!data->rpc_done)
cdd4e68b 971 goto out_free;
cdd4e68b 972 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 973 if (!IS_ERR(state))
dc0b027d 974 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 975out_free:
c6d00e63 976 nfs4_opendata_put(data);
cdd4e68b
TM		 977}
978
979static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 980 .rpc_call_done = nfs4_open_confirm_done,
981 .rpc_release = nfs4_open_confirm_release,
982};
983
984/*
985 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
986 */
987static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
988{
989 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
990 struct rpc_task *task;
5138fde0
TM		 991 struct rpc_message msg = {
992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
993 .rpc_argp = &data->c_arg,
994 .rpc_resp = &data->c_res,
995 .rpc_cred = data->owner->so_cred,
996 };
c970aa85
TM		 997 struct rpc_task_setup task_setup_data = {
998 .rpc_client = server->client,
5138fde0 999 .rpc_message = &msg,
c970aa85
TM		 1000 .callback_ops = &nfs4_open_confirm_ops,
1001 .callback_data = data,
101070ca 1002 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1003 .flags = RPC_TASK_ASYNC,
1004 };
1da177e4
LT		 1005 int status;
1006
c6d00e63 1007 kref_get(&data->kref);
3e309914
TM		 1008 data->rpc_done = 0;
1009 data->rpc_status = 0;
5138fde0 1010 data->timestamp = jiffies;
c970aa85 1011 task = rpc_run_task(&task_setup_data);
7a1218a2 1012 if (IS_ERR(task))
cdd4e68b 1013 return PTR_ERR(task);
cdd4e68b
TM		 1014 status = nfs4_wait_for_completion_rpc_task(task);
1015 if (status != 0) {
1016 data->cancelled = 1;
1017 smp_wmb();
1018 } else
1019 status = data->rpc_status;
e6b3c4db 1020 rpc_put_task(task);
1da177e4
LT		 1021 return status;
1022}
1023
24ac23ab 1024static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1025{
24ac23ab
TM		 1026 struct nfs4_opendata *data = calldata;
1027 struct nfs4_state_owner *sp = data->owner;
5138fde0 1028
24ac23ab
TM		 1029 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1030 return;
aac00a8d
TM		 1031 /*
1032 * Check if we still need to send an OPEN call, or if we can use
1033 * a delegation instead.
1034 */
1035 if (data->state != NULL) {
1036 struct nfs_delegation *delegation;
1037
dc0b027d 1038 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1039 goto out_no_action;
aac00a8d
TM		 1040 rcu_read_lock();
1041 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1042 if (delegation != NULL &&
15c831bf 1043 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1044 rcu_read_unlock();
6ee41268 1045 goto out_no_action;
aac00a8d
TM		 1046 }
1047 rcu_read_unlock();
1048 }
24ac23ab 1049 /* Update sequence id. */
9f958ab8 1050 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1051 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1052 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1053 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1054 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1055 }
26e976a8 1056 data->timestamp = jiffies;
5138fde0 1057 rpc_call_start(task);
6ee41268
TM		 1058 return;
1059out_no_action:
1060 task->tk_action = NULL;
1061
24ac23ab 1062}
1da177e4 1063
24ac23ab
TM		 1064static void nfs4_open_done(struct rpc_task *task, void *calldata)
1065{
1066 struct nfs4_opendata *data = calldata;
1da177e4 1067
24ac23ab
TM		 1068 data->rpc_status = task->tk_status;
1069 if (RPC_ASSASSINATED(task))
1070 return;
1071 if (task->tk_status == 0) {
1072 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1073 case S_IFREG:
1074 break;
1075 case S_IFLNK:
24ac23ab 1076 data->rpc_status = -ELOOP;
6f926b5b
TM		 1077 break;
1078 case S_IFDIR:
24ac23ab 1079 data->rpc_status = -EISDIR;
6f926b5b
TM		 1080 break;
1081 default:
24ac23ab 1082 data->rpc_status = -ENOTDIR;
6f926b5b 1083 }
26e976a8 1084 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1085 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1086 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1087 }
3e309914 1088 data->rpc_done = 1;
24ac23ab 1089}
6f926b5b 1090
24ac23ab
TM		 1091static void nfs4_open_release(void *calldata)
1092{
1093 struct nfs4_opendata *data = calldata;
1094 struct nfs4_state *state = NULL;
1095
1096 /* If this request hasn't been cancelled, do nothing */
1097 if (data->cancelled == 0)
1098 goto out_free;
1099 /* In case of error, no cleanup! */
3e309914 1100 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1101 goto out_free;
1102 /* In case we need an open_confirm, no cleanup! */
1103 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1104 goto out_free;
24ac23ab 1105 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1106 if (!IS_ERR(state))
dc0b027d 1107 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1108out_free:
c6d00e63 1109 nfs4_opendata_put(data);
24ac23ab
TM		 1110}
1111
1112static const struct rpc_call_ops nfs4_open_ops = {
1113 .rpc_call_prepare = nfs4_open_prepare,
1114 .rpc_call_done = nfs4_open_done,
1115 .rpc_release = nfs4_open_release,
1116};
1117
1118/*
1119 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1120 */
1121static int _nfs4_proc_open(struct nfs4_opendata *data)
1122{
1123 struct inode *dir = data->dir->d_inode;
1124 struct nfs_server *server = NFS_SERVER(dir);
1125 struct nfs_openargs *o_arg = &data->o_arg;
1126 struct nfs_openres *o_res = &data->o_res;
1127 struct rpc_task *task;
5138fde0
TM		 1128 struct rpc_message msg = {
1129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1130 .rpc_argp = o_arg,
1131 .rpc_resp = o_res,
1132 .rpc_cred = data->owner->so_cred,
1133 };
c970aa85
TM		 1134 struct rpc_task_setup task_setup_data = {
1135 .rpc_client = server->client,
5138fde0 1136 .rpc_message = &msg,
c970aa85
TM		 1137 .callback_ops = &nfs4_open_ops,
1138 .callback_data = data,
101070ca 1139 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1140 .flags = RPC_TASK_ASYNC,
1141 };
24ac23ab
TM		 1142 int status;
1143
c6d00e63 1144 kref_get(&data->kref);
3e309914
TM		 1145 data->rpc_done = 0;
1146 data->rpc_status = 0;
2ced46c2 1147 data->cancelled = 0;
c970aa85 1148 task = rpc_run_task(&task_setup_data);
7a1218a2 1149 if (IS_ERR(task))
24ac23ab 1150 return PTR_ERR(task);
24ac23ab
TM		 1151 status = nfs4_wait_for_completion_rpc_task(task);
1152 if (status != 0) {
1153 data->cancelled = 1;
1154 smp_wmb();
1155 } else
1156 status = data->rpc_status;
e6b3c4db 1157 rpc_put_task(task);
3e309914 1158 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1159 return status;
1160
9936781d
TM		 1161 if (o_res->fh.size == 0)
1162 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1163
56ae19f3
TM		 1164 if (o_arg->open_flags & O_CREAT) {
1165 update_changeattr(dir, &o_res->cinfo);
1166 nfs_post_op_update_inode(dir, o_res->dir_attr);
1167 } else
1168 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1169 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1170 status = _nfs4_proc_open_confirm(data);
1da177e4 1171 if (status != 0)
24ac23ab 1172 return status;
1da177e4
LT		 1173 }
1174 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1175 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1176 return 0;
1da177e4
LT		 1177}
1178
10afec90 1179static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1180{
7539bbab 1181 struct nfs_client *clp = server->nfs_client;
6b30954e 1182 int ret;
58d9714a 1183
6b30954e 1184 for (;;) {
65de872e 1185 ret = nfs4_wait_clnt_recover(clp);
6b30954e
TM		 1186 if (ret != 0)
1187 return ret;
e598d843
TM		 1188 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1189 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1190 break;
58d9714a 1191 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 1192 }
1193 return 0;
58d9714a
TM		 1194}
1195
1da177e4
LT		 1196/*
1197 * OPEN_EXPIRED:
1198 * reclaim state on the server after a network partition.
1199 * Assumes caller holds the appropriate lock
1200 */
539cd03a 1201static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1202{
e56e0b78 1203 struct nfs4_opendata *opendata;
864472e9 1204 int ret;
1da177e4 1205
6f220ed5
TM		 1206 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1207 if (IS_ERR(opendata))
1208 return PTR_ERR(opendata);
864472e9 1209 ret = nfs4_open_recover(opendata, state);
35d05778 1210 if (ret == -ESTALE)
539cd03a 1211 d_drop(ctx->path.dentry);
c6d00e63 1212 nfs4_opendata_put(opendata);
864472e9 1213 return ret;
1da177e4
LT		 1214}
1215
539cd03a 1216static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1217{
539cd03a 1218 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1219 struct nfs4_exception exception = { };
1220 int err;
1221
1222 do {
539cd03a 1223 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM		 1224 if (err != -NFS4ERR_DELAY)
1225 break;
1226 nfs4_handle_exception(server, err, &exception);
202b50dc
TM		 1227 } while (exception.retry);
1228 return err;
1229}
1230
1da177e4
LT		 1231static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1232{
1da177e4 1233 struct nfs_open_context *ctx;
864472e9 1234 int ret;
1da177e4 1235
864472e9
TM		 1236 ctx = nfs4_state_find_open_context(state);
1237 if (IS_ERR(ctx))
1238 return PTR_ERR(ctx);
539cd03a 1239 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1240 put_nfs_open_context(ctx);
1241 return ret;
1da177e4
LT		 1242}
1243
aa53ed54
JL		 1244/*
1245 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1246 * fields corresponding to attributes that were used to store the verifier.
1247 * Make sure we clobber those fields in the later setattr call
1248 */
1249static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1250{
1251 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1252 !(sattr->ia_valid & ATTR_ATIME_SET))
1253 sattr->ia_valid |= ATTR_ATIME;
1254
1255 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1256 !(sattr->ia_valid & ATTR_MTIME_SET))
1257 sattr->ia_valid |= ATTR_MTIME;
1258}
1259
1da177e4 1260/*
24ac23ab 1261 * Returns a referenced nfs4_state
1da177e4 1262 */
dc0b027d 1263static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1264{
1265 struct nfs4_state_owner *sp;
1266 struct nfs4_state *state = NULL;
1267 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1268 struct nfs4_opendata *opendata;
aac00a8d 1269 int status;
1da177e4
LT		 1270
1271 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1272 status = -ENOMEM;
1273 if (!(sp = nfs4_get_state_owner(server, cred))) {
1274 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1275 goto out_err;
1276 }
58d9714a
TM		 1277 status = nfs4_recover_expired_lease(server);
1278 if (status != 0)
b4454fe1 1279 goto err_put_state_owner;
aac00a8d 1280 if (path->dentry->d_inode != NULL)
dc0b027d 1281 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1282 status = -ENOMEM;
dc0b027d 1283 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1284 if (opendata == NULL)
95d35cb4 1285 goto err_put_state_owner;
1da177e4 1286
aac00a8d
TM		 1287 if (path->dentry->d_inode != NULL)
1288 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1289
24ac23ab 1290 status = _nfs4_proc_open(opendata);
1da177e4 1291 if (status != 0)
c6d00e63 1292 goto err_opendata_put;
1da177e4 1293
aa53ed54
JL		 1294 if (opendata->o_arg.open_flags & O_EXCL)
1295 nfs4_exclusive_attrset(opendata, sattr);
1296
24ac23ab 1297 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1298 status = PTR_ERR(state);
1299 if (IS_ERR(state))
c6d00e63 1300 goto err_opendata_put;
c6d00e63 1301 nfs4_opendata_put(opendata);
1da177e4 1302 nfs4_put_state_owner(sp);
1da177e4
LT		 1303 *res = state;
1304 return 0;
c6d00e63
TM		 1305err_opendata_put:
1306 nfs4_opendata_put(opendata);
e56e0b78
TM		 1307err_put_state_owner:
1308 nfs4_put_state_owner(sp);
1da177e4 1309out_err:
1da177e4
LT		 1310 *res = NULL;
1311 return status;
1312}
1313
1314
dc0b027d 1315static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1316{
1317 struct nfs4_exception exception = { };
1318 struct nfs4_state *res;
1319 int status;
1320
1321 do {
dc0b027d 1322 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1323 if (status == 0)
1324 break;
1325 /* NOTE: BAD_SEQID means the server and client disagree about the
1326 * book-keeping w.r.t. state-changing operations
1327 * (OPEN/CLOSE/LOCK/LOCKU...)
1328 * It is actually a sign of a bug on the client or on the server.
1329 *
1330 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1331 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1332 * have unhashed the old state_owner for us, and that we can
1333 * therefore safely retry using a new one. We should still warn
1334 * the user though...
1335 */
1336 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1337 printk(KERN_WARNING "NFS: v4 server %s "
1338 " returned a bad sequence-id error!\n",
1339 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1340 exception.retry = 1;
1341 continue;
1342 }
550f5747
TM		 1343 /*
1344 * BAD_STATEID on OPEN means that the server cancelled our
1345 * state before it received the OPEN_CONFIRM.
1346 * Recover by retrying the request as per the discussion
1347 * on Page 181 of RFC3530.
1348 */
1349 if (status == -NFS4ERR_BAD_STATEID) {
1350 exception.retry = 1;
1351 continue;
1352 }
aac00a8d
TM		 1353 if (status == -EAGAIN) {
1354 /* We must have found a delegation */
1355 exception.retry = 1;
1356 continue;
1357 }
1da177e4
LT		 1358 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1359 status, &exception));
1360 } while (exception.retry);
1361 return res;
1362}
1363
659bfcd6
TM		 1364static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1365 struct nfs_fattr *fattr, struct iattr *sattr,
1366 struct nfs4_state *state)
1da177e4 1367{
3e4f6290 1368 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1369 struct nfs_setattrargs arg = {
3e4f6290 1370 .fh = NFS_FH(inode),
1da177e4
LT		 1371 .iap = sattr,
1372 .server = server,
1373 .bitmask = server->attr_bitmask,
1374 };
1375 struct nfs_setattrres res = {
1376 .fattr = fattr,
1377 .server = server,
1378 };
1379 struct rpc_message msg = {
659bfcd6
TM		 1380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1381 .rpc_argp = &arg,
1382 .rpc_resp = &res,
1383 .rpc_cred = cred,
1da177e4 1384 };
26e976a8 1385 unsigned long timestamp = jiffies;
65e4308d 1386 int status;
1da177e4 1387
0e574af1 1388 nfs_fattr_init(fattr);
1da177e4 1389
3e4f6290
TM		 1390 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1391 /* Use that stateid */
1392 } else if (state != NULL) {
08e9eac4
TM		 1393 nfs4_copy_stateid(&arg.stateid, state, current->files);
1394 } else
1da177e4
LT		 1395 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1396
cccef3b9 1397 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1398 if (status == 0 && state != NULL)
1399 renew_lease(server, timestamp);
65e4308d 1400 return status;
1da177e4
LT		 1401}
1402
659bfcd6
TM		 1403static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1404 struct nfs_fattr *fattr, struct iattr *sattr,
1405 struct nfs4_state *state)
1da177e4 1406{
3e4f6290 1407 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1408 struct nfs4_exception exception = { };
1409 int err;
1410 do {
1411 err = nfs4_handle_exception(server,
659bfcd6 1412 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1413 &exception);
1414 } while (exception.retry);
1415 return err;
1416}
1417
1418struct nfs4_closedata {
4a35bd41 1419 struct path path;
1da177e4
LT		 1420 struct inode *inode;
1421 struct nfs4_state *state;
1422 struct nfs_closeargs arg;
1423 struct nfs_closeres res;
516a6af6 1424 struct nfs_fattr fattr;
26e976a8 1425 unsigned long timestamp;
1da177e4
LT		 1426};
1427
963d8fe5 1428static void nfs4_free_closedata(void *data)
9512135d 1429{
963d8fe5
TM		 1430 struct nfs4_closedata *calldata = data;
1431 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1432
1433 nfs4_put_open_state(calldata->state);
1434 nfs_free_seqid(calldata->arg.seqid);
9512135d 1435 nfs4_put_state_owner(sp);
31f31db1 1436 path_put(&calldata->path);
9512135d
TM		 1437 kfree(calldata);
1438}
1439
963d8fe5 1440static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1441{
963d8fe5 1442 struct nfs4_closedata *calldata = data;
1da177e4 1443 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1444 struct nfs_server *server = NFS_SERVER(calldata->inode);
1445
4ce70ada
TM		 1446 if (RPC_ASSASSINATED(task))
1447 return;
1da177e4
LT		 1448 /* hmm. we are done with the inode, and in the process of freeing
1449 * the state_owner. we keep this around to process errors
1450 */
1da177e4
LT		 1451 switch (task->tk_status) {
1452 case 0:
45328c35 1453 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1454 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1455 break;
1456 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1457 case -NFS4ERR_OLD_STATEID:
1458 case -NFS4ERR_BAD_STATEID:
1da177e4 1459 case -NFS4ERR_EXPIRED:
dc0b027d 1460 if (calldata->arg.fmode == 0)
9e33bed5 1461 break;
1da177e4 1462 default:
9e33bed5 1463 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1da177e4
LT		 1464 rpc_restart_call(task);
1465 return;
1466 }
1467 }
516a6af6 1468 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1469}
1470
4ce70ada 1471static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1472{
4ce70ada 1473 struct nfs4_closedata *calldata = data;
9512135d 1474 struct nfs4_state *state = calldata->state;
003707c7 1475 int clear_rd, clear_wr, clear_rdwr;
9512135d 1476
963d8fe5 1477 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1478 return;
003707c7 1479
003707c7 1480 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1481 spin_lock(&state->owner->so_lock);
003707c7 1482 /* Calculate the change in open mode */
e7616923 1483 if (state->n_rdwr == 0) {
003707c7 1484 if (state->n_rdonly == 0) {
003707c7
TM		 1485 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1486 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1487 }
1488 if (state->n_wronly == 0) {
003707c7
TM		 1489 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1490 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1491 }
e7616923 1492 }
4cecb76f 1493 spin_unlock(&state->owner->so_lock);
003707c7 1494 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1495 /* Note: exit _without_ calling nfs4_close_done */
1496 task->tk_action = NULL;
9512135d
TM		 1497 return;
1498 }
516a6af6 1499 nfs_fattr_init(calldata->res.fattr);
45328c35 1500 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1501 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1502 calldata->arg.fmode = FMODE_READ;
45328c35 1503 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1504 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1505 calldata->arg.fmode = FMODE_WRITE;
45328c35 1506 }
26e976a8 1507 calldata->timestamp = jiffies;
5138fde0 1508 rpc_call_start(task);
1da177e4
LT		 1509}
1510
963d8fe5 1511static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1512 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1513 .rpc_call_done = nfs4_close_done,
1514 .rpc_release = nfs4_free_closedata,
1515};
1516
1da177e4
LT		 1517/*
1518 * It is possible for data to be read/written from a mem-mapped file
1519 * after the sys_close call (which hits the vfs layer as a flush).
1520 * This means that we can't safely call nfsv4 close on a file until
1521 * the inode is cleared. This in turn means that we are not good
1522 * NFSv4 citizens - we do not indicate to the server to update the file's
1523 * share state even when we are done with one of the three share
1524 * stateid's in the inode.
1525 *
1526 * NOTE: Caller must be holding the sp->so_owner semaphore!
1527 */
a49c3c77 1528int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1529{
4a35bd41 1530 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1531 struct nfs4_closedata *calldata;
b39e625b
TM		 1532 struct nfs4_state_owner *sp = state->owner;
1533 struct rpc_task *task;
5138fde0
TM		 1534 struct rpc_message msg = {
1535 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1536 .rpc_cred = state->owner->so_cred,
1537 };
c970aa85
TM		 1538 struct rpc_task_setup task_setup_data = {
1539 .rpc_client = server->client,
5138fde0 1540 .rpc_message = &msg,
c970aa85 1541 .callback_ops = &nfs4_close_ops,
101070ca 1542 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1543 .flags = RPC_TASK_ASYNC,
1544 };
9512135d 1545 int status = -ENOMEM;
1da177e4 1546
9512135d 1547 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1548 if (calldata == NULL)
9512135d 1549 goto out;
4a35bd41 1550 calldata->inode = state->inode;
1da177e4 1551 calldata->state = state;
4a35bd41 1552 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1553 calldata->arg.stateid = &state->open_stateid;
1da177e4 1554 /* Serialization for the sequence id */
cee54fc9 1555 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1556 if (calldata->arg.seqid == NULL)
1557 goto out_free_calldata;
dc0b027d 1558 calldata->arg.fmode = 0;
a65318bf 1559 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1560 calldata->res.fattr = &calldata->fattr;
c1d51931 1561 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1562 calldata->res.server = server;
5f7dbd5c 1563 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1564 calldata->path.mnt = mntget(path->mnt);
1565 calldata->path.dentry = dget(path->dentry);
9512135d 1566
5138fde0
TM		 1567 msg.rpc_argp = &calldata->arg,
1568 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1569 task_setup_data.callback_data = calldata;
1570 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1571 if (IS_ERR(task))
1572 return PTR_ERR(task);
a49c3c77
TM		 1573 status = 0;
1574 if (wait)
1575 status = rpc_wait_for_completion_task(task);
b39e625b 1576 rpc_put_task(task);
a49c3c77 1577 return status;
9512135d
TM		 1578out_free_calldata:
1579 kfree(calldata);
1580out:
b39e625b
TM		 1581 nfs4_put_open_state(state);
1582 nfs4_put_state_owner(sp);
9512135d 1583 return status;
1da177e4
LT		 1584}
1585
dc0b027d 1586static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1587{
1588 struct file *filp;
1b45c46c 1589 int ret;
02a913a7 1590
1b45c46c 1591 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1592 if (fmode & FMODE_EXEC) {
af22f94a 1593 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1594 state->owner->so_cred,
1595 nd->intent.open.flags);
1596 if (ret < 0)
1597 goto out_close;
1598 }
4a35bd41 1599 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1600 if (!IS_ERR(filp)) {
1601 struct nfs_open_context *ctx;
cd3758e3 1602 ctx = nfs_file_open_context(filp);
02a913a7 1603 ctx->state = state;
95cf959b
TM		 1604 return 0;
1605 }
1b45c46c
TM		 1606 ret = PTR_ERR(filp);
1607out_close:
dc0b027d 1608 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1609 return ret;
02a913a7
TM		 1610}
1611
1612struct dentry *
1da177e4
LT		 1613nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1614{
ad389da7 1615 struct path path = {
4ac91378 1616 .mnt = nd->path.mnt,
ad389da7
TM		 1617 .dentry = dentry,
1618 };
4ac91378 1619 struct dentry *parent;
1da177e4
LT		 1620 struct iattr attr;
1621 struct rpc_cred *cred;
1622 struct nfs4_state *state;
02a913a7 1623 struct dentry *res;
dc0b027d 1624 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1625
1626 if (nd->flags & LOOKUP_CREATE) {
1627 attr.ia_mode = nd->intent.open.create_mode;
1628 attr.ia_valid = ATTR_MODE;
1629 if (!IS_POSIXACL(dir))
ce3b0f8d 1630 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1631 } else {
1632 attr.ia_valid = 0;
1633 BUG_ON(nd->intent.open.flags & O_CREAT);
1634 }
1635
98a8e323 1636 cred = rpc_lookup_cred();
1da177e4 1637 if (IS_ERR(cred))
02a913a7 1638 return (struct dentry *)cred;
565277f6
TM		 1639 parent = dentry->d_parent;
1640 /* Protect against concurrent sillydeletes */
1641 nfs_block_sillyrename(parent);
dc0b027d 1642 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1643 put_rpccred(cred);
02a913a7 1644 if (IS_ERR(state)) {
d75340cc 1645 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1646 d_add(dentry, NULL);
d75340cc
TM		 1647 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1648 }
565277f6 1649 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1650 return (struct dentry *)state;
1651 }
24ac23ab 1652 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1653 if (res != NULL)
deee9369 1654 path.dentry = res;
d75340cc 1655 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1656 nfs_unblock_sillyrename(parent);
dc0b027d 1657 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1658 return res;
1da177e4
LT		 1659}
1660
1661int
02a913a7 1662nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1663{
ad389da7 1664 struct path path = {
4ac91378 1665 .mnt = nd->path.mnt,
ad389da7
TM		 1666 .dentry = dentry,
1667 };
1da177e4
LT		 1668 struct rpc_cred *cred;
1669 struct nfs4_state *state;
dc0b027d 1670 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1671
98a8e323 1672 cred = rpc_lookup_cred();
1da177e4
LT		 1673 if (IS_ERR(cred))
1674 return PTR_ERR(cred);
dc0b027d 1675 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1676 put_rpccred(cred);
02a913a7
TM		 1677 if (IS_ERR(state)) {
1678 switch (PTR_ERR(state)) {
1679 case -EPERM:
1680 case -EACCES:
1681 case -EDQUOT:
1682 case -ENOSPC:
1683 case -EROFS:
1684 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1685 return 1;
b87c0adf
CL		 1686 default:
1687 goto out_drop;
02a913a7 1688 }
02a913a7 1689 }
24ac23ab 1690 if (state->inode == dentry->d_inode) {
d75340cc 1691 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1692 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1693 return 1;
1694 }
dc0b027d 1695 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1696out_drop:
1697 d_drop(dentry);
1da177e4
LT		 1698 return 0;
1699}
1700
7fe5c398
TM		 1701void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1702{
1703 if (ctx->state == NULL)
1704 return;
1705 if (is_sync)
1706 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1707 else
1708 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1709}
1da177e4
LT		 1710
1711static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1712{
43652ad5
BH		 1713 struct nfs4_server_caps_arg args = {
1714 .fhandle = fhandle,
1715 };
1da177e4
LT		 1716 struct nfs4_server_caps_res res = {};
1717 struct rpc_message msg = {
1718 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 1719 .rpc_argp = &args,
1da177e4
LT		 1720 .rpc_resp = &res,
1721 };
1722 int status;
1723
cccef3b9 1724 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1725 if (status == 0) {
1726 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1727 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1728 server->caps |= NFS_CAP_ACLS;
1729 if (res.has_links != 0)
1730 server->caps |= NFS_CAP_HARDLINKS;
1731 if (res.has_symlinks != 0)
1732 server->caps |= NFS_CAP_SYMLINKS;
a65318bf
TM		 1733 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1734 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1735 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 1736 server->acl_bitmask = res.acl_bitmask;
1737 }
cccef3b9 1738
1da177e4
LT		 1739 return status;
1740}
1741
55a97593 1742int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 1743{
1744 struct nfs4_exception exception = { };
1745 int err;
1746 do {
1747 err = nfs4_handle_exception(server,
1748 _nfs4_server_capabilities(server, fhandle),
1749 &exception);
1750 } while (exception.retry);
1751 return err;
1752}
1753
1754static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1755 struct nfs_fsinfo *info)
1756{
1da177e4
LT		 1757 struct nfs4_lookup_root_arg args = {
1758 .bitmask = nfs4_fattr_bitmap,
1759 };
1760 struct nfs4_lookup_res res = {
1761 .server = server,
0e574af1 1762 .fattr = info->fattr,
1da177e4
LT		 1763 .fh = fhandle,
1764 };
1765 struct rpc_message msg = {
1766 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1767 .rpc_argp = &args,
1768 .rpc_resp = &res,
1769 };
0e574af1 1770 nfs_fattr_init(info->fattr);
cccef3b9 1771 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1772}
1773
1774static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1775 struct nfs_fsinfo *info)
1776{
1777 struct nfs4_exception exception = { };
1778 int err;
1779 do {
1780 err = nfs4_handle_exception(server,
1781 _nfs4_lookup_root(server, fhandle, info),
1782 &exception);
1783 } while (exception.retry);
1784 return err;
1785}
1786
54ceac45
DH		 1787/*
1788 * get the file handle for the "/" directory on the server
1789 */
1da177e4 1790static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 1791 struct nfs_fsinfo *info)
1da177e4 1792{
1da177e4
LT		 1793 int status;
1794
1da177e4 1795 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 1796 if (status == 0)
1797 status = nfs4_server_capabilities(server, fhandle);
1798 if (status == 0)
1799 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 1800 return nfs4_map_errors(status);
1da177e4
LT		 1801}
1802
6b97fd3d
MN		 1803/*
1804 * Get locations and (maybe) other attributes of a referral.
1805 * Note that we'll actually follow the referral later when
1806 * we detect fsid mismatch in inode revalidation
1807 */
56659e99 1808static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 1809{
1810 int status = -ENOMEM;
1811 struct page *page = NULL;
1812 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 1813
1814 page = alloc_page(GFP_KERNEL);
1815 if (page == NULL)
1816 goto out;
1817 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1818 if (locations == NULL)
1819 goto out;
1820
c228fd3a 1821 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 1822 if (status != 0)
1823 goto out;
1824 /* Make sure server returned a different fsid for the referral */
1825 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 1826 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 1827 status = -EIO;
1828 goto out;
1829 }
1830
1831 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1832 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1833 if (!fattr->mode)
1834 fattr->mode = S_IFDIR;
1835 memset(fhandle, 0, sizeof(struct nfs_fh));
1836out:
1837 if (page)
1838 __free_page(page);
1839 if (locations)
1840 kfree(locations);
1841 return status;
1842}
1843
1da177e4
LT		 1844static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1845{
1846 struct nfs4_getattr_arg args = {
1847 .fh = fhandle,
1848 .bitmask = server->attr_bitmask,
1849 };
1850 struct nfs4_getattr_res res = {
1851 .fattr = fattr,
1852 .server = server,
1853 };
1854 struct rpc_message msg = {
1855 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1856 .rpc_argp = &args,
1857 .rpc_resp = &res,
1858 };
1859
0e574af1 1860 nfs_fattr_init(fattr);
cccef3b9 1861 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1862}
1863
1864static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1865{
1866 struct nfs4_exception exception = { };
1867 int err;
1868 do {
1869 err = nfs4_handle_exception(server,
1870 _nfs4_proc_getattr(server, fhandle, fattr),
1871 &exception);
1872 } while (exception.retry);
1873 return err;
1874}
1875
1876/*
1877 * The file is not closed if it is opened due to the a request to change
1878 * the size of the file. The open call will not be needed once the
1879 * VFS layer lookup-intents are implemented.
1880 *
1881 * Close is called when the inode is destroyed.
1882 * If we haven't opened the file for O_WRONLY, we
1883 * need to in the size_change case to obtain a stateid.
1884 *
1885 * Got race?
1886 * Because OPEN is always done by name in nfsv4, it is
1887 * possible that we opened a different file by the same
1888 * name. We can recognize this race condition, but we
1889 * can't do anything about it besides returning an error.
1890 *
1891 * This will be fixed with VFS changes (lookup-intent).
1892 */
1893static int
1894nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1895 struct iattr *sattr)
1896{
08e9eac4 1897 struct inode *inode = dentry->d_inode;
659bfcd6 1898 struct rpc_cred *cred = NULL;
d530838b 1899 struct nfs4_state *state = NULL;
1da177e4
LT		 1900 int status;
1901
0e574af1 1902 nfs_fattr_init(fattr);
1da177e4 1903
d530838b 1904 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 1905 if (sattr->ia_valid & ATTR_FILE) {
1906 struct nfs_open_context *ctx;
1907
1908 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 1909 if (ctx) {
1910 cred = ctx->cred;
1911 state = ctx->state;
1912 }
659bfcd6 1913 }
08e9eac4 1914
659bfcd6 1915 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 1916 if (status == 0)
1917 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 1918 return status;
1919}
1920
56659e99
TM		 1921static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1922 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 1923 struct nfs_fattr *fattr)
1924{
1925 int status;
1926 struct nfs4_lookup_arg args = {
1927 .bitmask = server->attr_bitmask,
1928 .dir_fh = dirfh,
1929 .name = name,
1930 };
1931 struct nfs4_lookup_res res = {
1932 .server = server,
1933 .fattr = fattr,
1934 .fh = fhandle,
1935 };
1936 struct rpc_message msg = {
1937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1938 .rpc_argp = &args,
1939 .rpc_resp = &res,
1940 };
1941
1942 nfs_fattr_init(fattr);
1943
1944 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 1945 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 1946 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 1947 return status;
1948}
1949
1950static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1951 struct qstr *name, struct nfs_fh *fhandle,
1952 struct nfs_fattr *fattr)
1953{
1954 struct nfs4_exception exception = { };
1955 int err;
1956 do {
4e56e082
TM		 1957 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1958 /* FIXME: !!!! */
1959 if (err == -NFS4ERR_MOVED) {
1960 err = -EREMOTE;
1961 break;
1962 }
1963 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 1964 } while (exception.retry);
1965 return err;
1966}
1967
56659e99 1968static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 1969 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1970{
4e56e082 1971 int status;
1da177e4
LT		 1972
1973 dprintk("NFS call lookup %s\n", name->name);
4e56e082 1974 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 1975 if (status == -NFS4ERR_MOVED)
1976 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 1977 dprintk("NFS reply lookup: %d\n", status);
1978 return status;
1979}
1980
1981static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1982{
1983 struct nfs4_exception exception = { };
1984 int err;
1985 do {
1986 err = nfs4_handle_exception(NFS_SERVER(dir),
1987 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1988 &exception);
1989 } while (exception.retry);
1990 return err;
1991}
1992
1993static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1994{
76b32999
TM		 1995 struct nfs_server *server = NFS_SERVER(inode);
1996 struct nfs_fattr fattr;
1da177e4
LT		 1997 struct nfs4_accessargs args = {
1998 .fh = NFS_FH(inode),
76b32999
TM		 1999 .bitmask = server->attr_bitmask,
2000 };
2001 struct nfs4_accessres res = {
2002 .server = server,
2003 .fattr = &fattr,
1da177e4 2004 };
1da177e4
LT		 2005 struct rpc_message msg = {
2006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2007 .rpc_argp = &args,
2008 .rpc_resp = &res,
2009 .rpc_cred = entry->cred,
2010 };
2011 int mode = entry->mask;
2012 int status;
2013
2014 /*
2015 * Determine which access bits we want to ask for...
2016 */
2017 if (mode & MAY_READ)
2018 args.access |= NFS4_ACCESS_READ;
2019 if (S_ISDIR(inode->i_mode)) {
2020 if (mode & MAY_WRITE)
2021 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2022 if (mode & MAY_EXEC)
2023 args.access |= NFS4_ACCESS_LOOKUP;
2024 } else {
2025 if (mode & MAY_WRITE)
2026 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2027 if (mode & MAY_EXEC)
2028 args.access |= NFS4_ACCESS_EXECUTE;
2029 }
76b32999 2030 nfs_fattr_init(&fattr);
cccef3b9 2031 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2032 if (!status) {
2033 entry->mask = 0;
2034 if (res.access & NFS4_ACCESS_READ)
2035 entry->mask |= MAY_READ;
2036 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2037 entry->mask |= MAY_WRITE;
2038 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2039 entry->mask |= MAY_EXEC;
76b32999 2040 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2041 }
2042 return status;
2043}
2044
2045static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2046{
2047 struct nfs4_exception exception = { };
2048 int err;
2049 do {
2050 err = nfs4_handle_exception(NFS_SERVER(inode),
2051 _nfs4_proc_access(inode, entry),
2052 &exception);
2053 } while (exception.retry);
2054 return err;
2055}
2056
2057/*
2058 * TODO: For the time being, we don't try to get any attributes
2059 * along with any of the zero-copy operations READ, READDIR,
2060 * READLINK, WRITE.
2061 *
2062 * In the case of the first three, we want to put the GETATTR
2063 * after the read-type operation -- this is because it is hard
2064 * to predict the length of a GETATTR response in v4, and thus
2065 * align the READ data correctly. This means that the GETATTR
2066 * may end up partially falling into the page cache, and we should
2067 * shift it into the 'tail' of the xdr_buf before processing.
2068 * To do this efficiently, we need to know the total length
2069 * of data received, which doesn't seem to be available outside
2070 * of the RPC layer.
2071 *
2072 * In the case of WRITE, we also want to put the GETATTR after
2073 * the operation -- in this case because we want to make sure
2074 * we get the post-operation mtime and size. This means that
2075 * we can't use xdr_encode_pages() as written: we need a variant
2076 * of it which would leave room in the 'tail' iovec.
2077 *
2078 * Both of these changes to the XDR layer would in fact be quite
2079 * minor, but I decided to leave them for a subsequent patch.
2080 */
2081static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2082 unsigned int pgbase, unsigned int pglen)
2083{
2084 struct nfs4_readlink args = {
2085 .fh = NFS_FH(inode),
2086 .pgbase = pgbase,
2087 .pglen = pglen,
2088 .pages = &page,
2089 };
f50c7000 2090 struct nfs4_readlink_res res;
1da177e4
LT		 2091 struct rpc_message msg = {
2092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2093 .rpc_argp = &args,
f50c7000 2094 .rpc_resp = &res,
1da177e4
LT		 2095 };
2096
cccef3b9 2097 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2098}
2099
2100static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2101 unsigned int pgbase, unsigned int pglen)
2102{
2103 struct nfs4_exception exception = { };
2104 int err;
2105 do {
2106 err = nfs4_handle_exception(NFS_SERVER(inode),
2107 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2108 &exception);
2109 } while (exception.retry);
2110 return err;
2111}
2112
1da177e4
LT		 2113/*
2114 * Got race?
2115 * We will need to arrange for the VFS layer to provide an atomic open.
2116 * Until then, this create/open method is prone to inefficiency and race
2117 * conditions due to the lookup, create, and open VFS calls from sys_open()
2118 * placed on the wire.
2119 *
2120 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2121 * The file will be opened again in the subsequent VFS open call
2122 * (nfs4_proc_file_open).
2123 *
2124 * The open for read will just hang around to be used by any process that
2125 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2126 */
2127
2128static int
2129nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2130 int flags, struct nameidata *nd)
1da177e4 2131{
ad389da7 2132 struct path path = {
4ac91378 2133 .mnt = nd->path.mnt,
ad389da7
TM		 2134 .dentry = dentry,
2135 };
1da177e4
LT		 2136 struct nfs4_state *state;
2137 struct rpc_cred *cred;
dc0b027d 2138 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2139 int status = 0;
2140
98a8e323 2141 cred = rpc_lookup_cred();
1da177e4
LT		 2142 if (IS_ERR(cred)) {
2143 status = PTR_ERR(cred);
2144 goto out;
2145 }
dc0b027d 2146 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2147 d_drop(dentry);
1da177e4
LT		 2148 if (IS_ERR(state)) {
2149 status = PTR_ERR(state);
659bfcd6 2150 goto out_putcred;
1da177e4 2151 }
d4d9cdcb 2152 d_add(dentry, igrab(state->inode));
d75340cc 2153 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2154 if (flags & O_EXCL) {
2155 struct nfs_fattr fattr;
659bfcd6 2156 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2157 if (status == 0)
65e4308d 2158 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2159 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2160 }
ad389da7 2161 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2162 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2163 else
dc0b027d 2164 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2165out_putcred:
2166 put_rpccred(cred);
1da177e4
LT		 2167out:
2168 return status;
2169}
2170
2171static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2172{
16e42959 2173 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2174 struct nfs_removeargs args = {
1da177e4 2175 .fh = NFS_FH(dir),
4fdc17b2
TM		 2176 .name.len = name->len,
2177 .name.name = name->name,
16e42959
TM		 2178 .bitmask = server->attr_bitmask,
2179 };
4fdc17b2 2180 struct nfs_removeres res = {
16e42959 2181 .server = server,
1da177e4 2182 };
1da177e4 2183 struct rpc_message msg = {
4fdc17b2
TM		 2184 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2185 .rpc_argp = &args,
2186 .rpc_resp = &res,
1da177e4
LT		 2187 };
2188 int status;
2189
4fdc17b2 2190 nfs_fattr_init(&res.dir_attr);
cccef3b9 2191 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2192 if (status == 0) {
2193 update_changeattr(dir, &res.cinfo);
4fdc17b2 2194 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2195 }
1da177e4
LT		 2196 return status;
2197}
2198
2199static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2200{
2201 struct nfs4_exception exception = { };
2202 int err;
2203 do {
2204 err = nfs4_handle_exception(NFS_SERVER(dir),
2205 _nfs4_proc_remove(dir, name),
2206 &exception);
2207 } while (exception.retry);
2208 return err;
2209}
2210
e4eff1a6 2211static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2212{
e4eff1a6
TM		 2213 struct nfs_server *server = NFS_SERVER(dir);
2214 struct nfs_removeargs *args = msg->rpc_argp;
2215 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2216
a65318bf 2217 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2218 res->server = server;
1da177e4 2219 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2220}
2221
e4eff1a6 2222static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2223{
e4eff1a6
TM		 2224 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2225
9e33bed5 2226 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2227 return 0;
2228 update_changeattr(dir, &res->cinfo);
2229 nfs_post_op_update_inode(dir, &res->dir_attr);
2230 return 1;
1da177e4
LT		 2231}
2232
2233static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2234 struct inode *new_dir, struct qstr *new_name)
2235{
6caf2c82 2236 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2237 struct nfs4_rename_arg arg = {
2238 .old_dir = NFS_FH(old_dir),
2239 .new_dir = NFS_FH(new_dir),
2240 .old_name = old_name,
2241 .new_name = new_name,
6caf2c82
TM		 2242 .bitmask = server->attr_bitmask,
2243 };
2244 struct nfs_fattr old_fattr, new_fattr;
2245 struct nfs4_rename_res res = {
2246 .server = server,
2247 .old_fattr = &old_fattr,
2248 .new_fattr = &new_fattr,
1da177e4 2249 };
1da177e4
LT		 2250 struct rpc_message msg = {
2251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2252 .rpc_argp = &arg,
2253 .rpc_resp = &res,
2254 };
2255 int status;
2256
6caf2c82
TM		 2257 nfs_fattr_init(res.old_fattr);
2258 nfs_fattr_init(res.new_fattr);
cccef3b9 2259 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2260
2261 if (!status) {
2262 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2263 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2264 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2265 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2266 }
2267 return status;
2268}
2269
2270static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2271 struct inode *new_dir, struct qstr *new_name)
2272{
2273 struct nfs4_exception exception = { };
2274 int err;
2275 do {
2276 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2277 _nfs4_proc_rename(old_dir, old_name,
2278 new_dir, new_name),
2279 &exception);
2280 } while (exception.retry);
2281 return err;
2282}
2283
2284static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2285{
91ba2eee 2286 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2287 struct nfs4_link_arg arg = {
2288 .fh = NFS_FH(inode),
2289 .dir_fh = NFS_FH(dir),
2290 .name = name,
91ba2eee
TM		 2291 .bitmask = server->attr_bitmask,
2292 };
2293 struct nfs_fattr fattr, dir_attr;
2294 struct nfs4_link_res res = {
2295 .server = server,
2296 .fattr = &fattr,
2297 .dir_attr = &dir_attr,
1da177e4 2298 };
1da177e4
LT		 2299 struct rpc_message msg = {
2300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2301 .rpc_argp = &arg,
91ba2eee 2302 .rpc_resp = &res,
1da177e4
LT		 2303 };
2304 int status;
2305
91ba2eee
TM		 2306 nfs_fattr_init(res.fattr);
2307 nfs_fattr_init(res.dir_attr);
cccef3b9 2308 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2309 if (!status) {
2310 update_changeattr(dir, &res.cinfo);
2311 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2312 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2313 }
1da177e4
LT		 2314
2315 return status;
2316}
2317
2318static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2319{
2320 struct nfs4_exception exception = { };
2321 int err;
2322 do {
2323 err = nfs4_handle_exception(NFS_SERVER(inode),
2324 _nfs4_proc_link(inode, dir, name),
2325 &exception);
2326 } while (exception.retry);
2327 return err;
2328}
2329
57dc9a57
TM		 2330struct nfs4_createdata {
2331 struct rpc_message msg;
2332 struct nfs4_create_arg arg;
2333 struct nfs4_create_res res;
2334 struct nfs_fh fh;
2335 struct nfs_fattr fattr;
2336 struct nfs_fattr dir_fattr;
2337};
2338
2339static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2340 struct qstr *name, struct iattr *sattr, u32 ftype)
2341{
2342 struct nfs4_createdata *data;
2343
2344 data = kzalloc(sizeof(*data), GFP_KERNEL);
2345 if (data != NULL) {
2346 struct nfs_server *server = NFS_SERVER(dir);
2347
2348 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2349 data->msg.rpc_argp = &data->arg;
2350 data->msg.rpc_resp = &data->res;
2351 data->arg.dir_fh = NFS_FH(dir);
2352 data->arg.server = server;
2353 data->arg.name = name;
2354 data->arg.attrs = sattr;
2355 data->arg.ftype = ftype;
2356 data->arg.bitmask = server->attr_bitmask;
2357 data->res.server = server;
2358 data->res.fh = &data->fh;
2359 data->res.fattr = &data->fattr;
2360 data->res.dir_fattr = &data->dir_fattr;
2361 nfs_fattr_init(data->res.fattr);
2362 nfs_fattr_init(data->res.dir_fattr);
2363 }
2364 return data;
2365}
2366
2367static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2368{
cccef3b9
AA		 2369 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2370 &data->arg, &data->res, 1);
57dc9a57
TM		 2371 if (status == 0) {
2372 update_changeattr(dir, &data->res.dir_cinfo);
2373 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2374 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2375 }
2376 return status;
2377}
2378
2379static void nfs4_free_createdata(struct nfs4_createdata *data)
2380{
2381 kfree(data);
2382}
2383
4f390c15 2384static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2385 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2386{
57dc9a57
TM		 2387 struct nfs4_createdata *data;
2388 int status = -ENAMETOOLONG;
1da177e4 2389
94a6d753 2390 if (len > NFS4_MAXPATHLEN)
57dc9a57 2391 goto out;
4f390c15 2392
57dc9a57
TM		 2393 status = -ENOMEM;
2394 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2395 if (data == NULL)
2396 goto out;
2397
2398 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2399 data->arg.u.symlink.pages = &page;
2400 data->arg.u.symlink.len = len;
1da177e4 2401
57dc9a57
TM		 2402 status = nfs4_do_create(dir, dentry, data);
2403
2404 nfs4_free_createdata(data);
2405out:
1da177e4
LT		 2406 return status;
2407}
2408
4f390c15 2409static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2410 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2411{
2412 struct nfs4_exception exception = { };
2413 int err;
2414 do {
2415 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2416 _nfs4_proc_symlink(dir, dentry, page,
2417 len, sattr),
1da177e4
LT		 2418 &exception);
2419 } while (exception.retry);
2420 return err;
2421}
2422
2423static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2424 struct iattr *sattr)
2425{
57dc9a57
TM		 2426 struct nfs4_createdata *data;
2427 int status = -ENOMEM;
1da177e4 2428
57dc9a57
TM		 2429 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2430 if (data == NULL)
2431 goto out;
2432
2433 status = nfs4_do_create(dir, dentry, data);
2434
2435 nfs4_free_createdata(data);
2436out:
1da177e4
LT		 2437 return status;
2438}
2439
2440static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2441 struct iattr *sattr)
2442{
2443 struct nfs4_exception exception = { };
2444 int err;
2445 do {
2446 err = nfs4_handle_exception(NFS_SERVER(dir),
2447 _nfs4_proc_mkdir(dir, dentry, sattr),
2448 &exception);
2449 } while (exception.retry);
2450 return err;
2451}
2452
2453static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2454 u64 cookie, struct page *page, unsigned int count, int plus)
2455{
2456 struct inode *dir = dentry->d_inode;
2457 struct nfs4_readdir_arg args = {
2458 .fh = NFS_FH(dir),
2459 .pages = &page,
2460 .pgbase = 0,
2461 .count = count,
a65318bf 2462 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
1da177e4
LT		 2463 };
2464 struct nfs4_readdir_res res;
2465 struct rpc_message msg = {
2466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2467 .rpc_argp = &args,
2468 .rpc_resp = &res,
2469 .rpc_cred = cred,
2470 };
2471 int status;
2472
3110ff80 2473 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2474 dentry->d_parent->d_name.name,
2475 dentry->d_name.name,
2476 (unsigned long long)cookie);
1da177e4
LT		 2477 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2478 res.pgbase = args.pgbase;
cccef3b9 2479 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2480 if (status == 0)
2481 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2482
2483 nfs_invalidate_atime(dir);
2484
3110ff80 2485 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2486 return status;
2487}
2488
2489static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2490 u64 cookie, struct page *page, unsigned int count, int plus)
2491{
2492 struct nfs4_exception exception = { };
2493 int err;
2494 do {
2495 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2496 _nfs4_proc_readdir(dentry, cred, cookie,
2497 page, count, plus),
2498 &exception);
2499 } while (exception.retry);
2500 return err;
2501}
2502
2503static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2504 struct iattr *sattr, dev_t rdev)
2505{
57dc9a57
TM		 2506 struct nfs4_createdata *data;
2507 int mode = sattr->ia_mode;
2508 int status = -ENOMEM;
1da177e4
LT		 2509
2510 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2511 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2512
2513 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2514 if (data == NULL)
2515 goto out;
2516
1da177e4 2517 if (S_ISFIFO(mode))
57dc9a57 2518 data->arg.ftype = NF4FIFO;
1da177e4 2519 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2520 data->arg.ftype = NF4BLK;
2521 data->arg.u.device.specdata1 = MAJOR(rdev);
2522 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2523 }
2524 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2525 data->arg.ftype = NF4CHR;
2526 data->arg.u.device.specdata1 = MAJOR(rdev);
2527 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2528 }
1da177e4 2529
57dc9a57
TM		 2530 status = nfs4_do_create(dir, dentry, data);
2531
2532 nfs4_free_createdata(data);
2533out:
1da177e4
LT		 2534 return status;
2535}
2536
2537static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2538 struct iattr *sattr, dev_t rdev)
2539{
2540 struct nfs4_exception exception = { };
2541 int err;
2542 do {
2543 err = nfs4_handle_exception(NFS_SERVER(dir),
2544 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2545 &exception);
2546 } while (exception.retry);
2547 return err;
2548}
2549
2550static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2551 struct nfs_fsstat *fsstat)
2552{
2553 struct nfs4_statfs_arg args = {
2554 .fh = fhandle,
2555 .bitmask = server->attr_bitmask,
2556 };
24ad148a
BH		 2557 struct nfs4_statfs_res res = {
2558 .fsstat = fsstat,
2559 };
1da177e4
LT		 2560 struct rpc_message msg = {
2561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2562 .rpc_argp = &args,
24ad148a 2563 .rpc_resp = &res,
1da177e4
LT		 2564 };
2565
0e574af1 2566 nfs_fattr_init(fsstat->fattr);
cccef3b9 2567 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2568}
2569
2570static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2571{
2572 struct nfs4_exception exception = { };
2573 int err;
2574 do {
2575 err = nfs4_handle_exception(server,
2576 _nfs4_proc_statfs(server, fhandle, fsstat),
2577 &exception);
2578 } while (exception.retry);
2579 return err;
2580}
2581
2582static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2583 struct nfs_fsinfo *fsinfo)
2584{
2585 struct nfs4_fsinfo_arg args = {
2586 .fh = fhandle,
2587 .bitmask = server->attr_bitmask,
2588 };
3dda5e43
BH		 2589 struct nfs4_fsinfo_res res = {
2590 .fsinfo = fsinfo,
2591 };
1da177e4
LT		 2592 struct rpc_message msg = {
2593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2594 .rpc_argp = &args,
3dda5e43 2595 .rpc_resp = &res,
1da177e4
LT		 2596 };
2597
cccef3b9 2598 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2599}
2600
2601static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2602{
2603 struct nfs4_exception exception = { };
2604 int err;
2605
2606 do {
2607 err = nfs4_handle_exception(server,
2608 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2609 &exception);
2610 } while (exception.retry);
2611 return err;
2612}
2613
2614static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2615{
0e574af1 2616 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2617 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2618}
2619
2620static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2621 struct nfs_pathconf *pathconf)
2622{
2623 struct nfs4_pathconf_arg args = {
2624 .fh = fhandle,
2625 .bitmask = server->attr_bitmask,
2626 };
d45b2989
BH		 2627 struct nfs4_pathconf_res res = {
2628 .pathconf = pathconf,
2629 };
1da177e4
LT		 2630 struct rpc_message msg = {
2631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2632 .rpc_argp = &args,
d45b2989 2633 .rpc_resp = &res,
1da177e4
LT		 2634 };
2635
2636 /* None of the pathconf attributes are mandatory to implement */
2637 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2638 memset(pathconf, 0, sizeof(*pathconf));
2639 return 0;
2640 }
2641
0e574af1 2642 nfs_fattr_init(pathconf->fattr);
cccef3b9 2643 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2644}
2645
2646static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2647 struct nfs_pathconf *pathconf)
2648{
2649 struct nfs4_exception exception = { };
2650 int err;
2651
2652 do {
2653 err = nfs4_handle_exception(server,
2654 _nfs4_proc_pathconf(server, fhandle, pathconf),
2655 &exception);
2656 } while (exception.retry);
2657 return err;
2658}
2659
ec06c096 2660static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2661{
ec06c096 2662 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2663
9e33bed5 2664 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
1da177e4 2665 rpc_restart_call(task);
ec06c096 2666 return -EAGAIN;
1da177e4 2667 }
8850df99
TM		 2668
2669 nfs_invalidate_atime(data->inode);
1da177e4 2670 if (task->tk_status > 0)
ec06c096
TM		 2671 renew_lease(server, data->timestamp);
2672 return 0;
1da177e4
LT		 2673}
2674
bdc7f021 2675static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2676{
1da177e4 2677 data->timestamp = jiffies;
bdc7f021 2678 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2679}
2680
788e7a89 2681static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2682{
1da177e4
LT		 2683 struct inode *inode = data->inode;
2684
9e33bed5 2685 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
1da177e4 2686 rpc_restart_call(task);
788e7a89 2687 return -EAGAIN;
1da177e4 2688 }
4f9838c7 2689 if (task->tk_status >= 0) {
1da177e4 2690 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2691 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2692 }
788e7a89 2693 return 0;
1da177e4
LT		 2694}
2695
bdc7f021 2696static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2697{
bdc7f021
TM		 2698 struct nfs_server *server = NFS_SERVER(data->inode);
2699
a65318bf 2700 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2701 data->res.server = server;
1da177e4
LT		 2702 data->timestamp = jiffies;
2703
bdc7f021 2704 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2705}
2706
788e7a89 2707static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2708{
1da177e4
LT		 2709 struct inode *inode = data->inode;
2710
9e33bed5 2711 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
1da177e4 2712 rpc_restart_call(task);
788e7a89 2713 return -EAGAIN;
1da177e4 2714 }
9e08a3c5 2715 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2716 return 0;
1da177e4
LT		 2717}
2718
bdc7f021 2719static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2720{
788e7a89 2721 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2722
a65318bf 2723 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2724 data->res.server = server;
bdc7f021 2725 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2726}
2727
2728/*
2729 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2730 * standalone procedure for queueing an asynchronous RENEW.
2731 */
963d8fe5 2732static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 2733{
adfa6f98 2734 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 2735 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 2736
2737 if (task->tk_status < 0) {
95baa25c
TM		 2738 /* Unless we're shutting down, schedule state recovery! */
2739 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
2740 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 2741 return;
2742 }
2743 spin_lock(&clp->cl_lock);
2744 if (time_before(clp->cl_last_renewal,timestamp))
2745 clp->cl_last_renewal = timestamp;
2746 spin_unlock(&clp->cl_lock);
2747}
2748
963d8fe5
TM		 2749static const struct rpc_call_ops nfs4_renew_ops = {
2750 .rpc_call_done = nfs4_renew_done,
2751};
2752
adfa6f98 2753int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2754{
2755 struct rpc_message msg = {
2756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2757 .rpc_argp = clp,
b4454fe1 2758 .rpc_cred = cred,
1da177e4
LT		 2759 };
2760
2761 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 2762 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 2763}
2764
adfa6f98 2765int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 2766{
2767 struct rpc_message msg = {
2768 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2769 .rpc_argp = clp,
b4454fe1 2770 .rpc_cred = cred,
1da177e4
LT		 2771 };
2772 unsigned long now = jiffies;
2773 int status;
2774
2775 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2776 if (status < 0)
2777 return status;
2778 spin_lock(&clp->cl_lock);
2779 if (time_before(clp->cl_last_renewal,now))
2780 clp->cl_last_renewal = now;
2781 spin_unlock(&clp->cl_lock);
2782 return 0;
2783}
2784
aa1870af
BF		 2785static inline int nfs4_server_supports_acls(struct nfs_server *server)
2786{
2787 return (server->caps & NFS_CAP_ACLS)
2788 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2789 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2790}
2791
2792/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2793 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2794 * the stack.
2795 */
2796#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2797
2798static void buf_to_pages(const void *buf, size_t buflen,
2799 struct page **pages, unsigned int *pgbase)
2800{
2801 const void *p = buf;
2802
2803 *pgbase = offset_in_page(buf);
2804 p -= *pgbase;
2805 while (p < buf + buflen) {
2806 *(pages++) = virt_to_page(p);
2807 p += PAGE_CACHE_SIZE;
2808 }
2809}
2810
e50a1c2e
BF		 2811struct nfs4_cached_acl {
2812 int cached;
2813 size_t len;
3e9d4154 2814 char data[0];
e50a1c2e
BF		 2815};
2816
2817static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2818{
2819 struct nfs_inode *nfsi = NFS_I(inode);
2820
2821 spin_lock(&inode->i_lock);
2822 kfree(nfsi->nfs4_acl);
2823 nfsi->nfs4_acl = acl;
2824 spin_unlock(&inode->i_lock);
2825}
2826
2827static void nfs4_zap_acl_attr(struct inode *inode)
2828{
2829 nfs4_set_cached_acl(inode, NULL);
2830}
2831
2832static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2833{
2834 struct nfs_inode *nfsi = NFS_I(inode);
2835 struct nfs4_cached_acl *acl;
2836 int ret = -ENOENT;
2837
2838 spin_lock(&inode->i_lock);
2839 acl = nfsi->nfs4_acl;
2840 if (acl == NULL)
2841 goto out;
2842 if (buf == NULL) /* user is just asking for length */
2843 goto out_len;
2844 if (acl->cached == 0)
2845 goto out;
2846 ret = -ERANGE; /* see getxattr(2) man page */
2847 if (acl->len > buflen)
2848 goto out;
2849 memcpy(buf, acl->data, acl->len);
2850out_len:
2851 ret = acl->len;
2852out:
2853 spin_unlock(&inode->i_lock);
2854 return ret;
2855}
2856
2857static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2858{
2859 struct nfs4_cached_acl *acl;
2860
2861 if (buf && acl_len <= PAGE_SIZE) {
2862 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2863 if (acl == NULL)
2864 goto out;
2865 acl->cached = 1;
2866 memcpy(acl->data, buf, acl_len);
2867 } else {
2868 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2869 if (acl == NULL)
2870 goto out;
2871 acl->cached = 0;
2872 }
2873 acl->len = acl_len;
2874out:
2875 nfs4_set_cached_acl(inode, acl);
2876}
2877
16b4289c 2878static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2879{
aa1870af
BF		 2880 struct page *pages[NFS4ACL_MAXPAGES];
2881 struct nfs_getaclargs args = {
2882 .fh = NFS_FH(inode),
2883 .acl_pages = pages,
2884 .acl_len = buflen,
2885 };
663c79b3
BH		 2886 struct nfs_getaclres res = {
2887 .acl_len = buflen,
2888 };
e50a1c2e 2889 void *resp_buf;
aa1870af
BF		 2890 struct rpc_message msg = {
2891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2892 .rpc_argp = &args,
663c79b3 2893 .rpc_resp = &res,
aa1870af 2894 };
e50a1c2e 2895 struct page *localpage = NULL;
aa1870af
BF		 2896 int ret;
2897
e50a1c2e
BF		 2898 if (buflen < PAGE_SIZE) {
2899 /* As long as we're doing a round trip to the server anyway,
2900 * let's be prepared for a page of acl data. */
2901 localpage = alloc_page(GFP_KERNEL);
2902 resp_buf = page_address(localpage);
2903 if (localpage == NULL)
2904 return -ENOMEM;
2905 args.acl_pages[0] = localpage;
2906 args.acl_pgbase = 0;
663c79b3 2907 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 2908 } else {
2909 resp_buf = buf;
2910 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2911 }
cccef3b9 2912 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 2913 if (ret)
2914 goto out_free;
663c79b3
BH		 2915 if (res.acl_len > args.acl_len)
2916 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 2917 else
663c79b3 2918 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 2919 if (buf) {
2920 ret = -ERANGE;
663c79b3 2921 if (res.acl_len > buflen)
e50a1c2e
BF		 2922 goto out_free;
2923 if (localpage)
663c79b3 2924 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 2925 }
663c79b3 2926 ret = res.acl_len;
e50a1c2e
BF		 2927out_free:
2928 if (localpage)
2929 __free_page(localpage);
aa1870af
BF		 2930 return ret;
2931}
2932
16b4289c
TM		 2933static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2934{
2935 struct nfs4_exception exception = { };
2936 ssize_t ret;
2937 do {
2938 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2939 if (ret >= 0)
2940 break;
2941 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2942 } while (exception.retry);
2943 return ret;
2944}
2945
e50a1c2e
BF		 2946static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2947{
2948 struct nfs_server *server = NFS_SERVER(inode);
2949 int ret;
2950
2951 if (!nfs4_server_supports_acls(server))
2952 return -EOPNOTSUPP;
2953 ret = nfs_revalidate_inode(server, inode);
2954 if (ret < 0)
2955 return ret;
f41f7418
TM		 2956 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2957 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 2958 ret = nfs4_read_cached_acl(inode, buf, buflen);
2959 if (ret != -ENOENT)
2960 return ret;
2961 return nfs4_get_acl_uncached(inode, buf, buflen);
2962}
2963
16b4289c 2964static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 2965{
2966 struct nfs_server *server = NFS_SERVER(inode);
2967 struct page *pages[NFS4ACL_MAXPAGES];
2968 struct nfs_setaclargs arg = {
2969 .fh = NFS_FH(inode),
2970 .acl_pages = pages,
2971 .acl_len = buflen,
2972 };
73c403a9 2973 struct nfs_setaclres res;
4b580ee3
BF		 2974 struct rpc_message msg = {
2975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2976 .rpc_argp = &arg,
73c403a9 2977 .rpc_resp = &res,
4b580ee3
BF		 2978 };
2979 int ret;
2980
2981 if (!nfs4_server_supports_acls(server))
2982 return -EOPNOTSUPP;
642ac549 2983 nfs_inode_return_delegation(inode);
4b580ee3 2984 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 2985 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 2986 nfs_access_zap_cache(inode);
2987 nfs_zap_acl_cache(inode);
4b580ee3
BF		 2988 return ret;
2989}
2990
16b4289c
TM		 2991static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2992{
2993 struct nfs4_exception exception = { };
2994 int err;
2995 do {
2996 err = nfs4_handle_exception(NFS_SERVER(inode),
2997 __nfs4_proc_set_acl(inode, buf, buflen),
2998 &exception);
2999 } while (exception.retry);
3000 return err;
3001}
3002
1da177e4 3003static int
9e33bed5 3004nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3005{
7539bbab 3006 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 3007
3008 if (!clp || task->tk_status >= 0)
3009 return 0;
3010 switch(task->tk_status) {
9e33bed5
TM		 3011 case -NFS4ERR_ADMIN_REVOKED:
3012 case -NFS4ERR_BAD_STATEID:
3013 case -NFS4ERR_OPENMODE:
3014 if (state == NULL)
3015 break;
3016 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3017 case -NFS4ERR_STALE_CLIENTID:
3018 case -NFS4ERR_STALE_STATEID:
3019 case -NFS4ERR_EXPIRED:
5d00837b 3020 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3021 nfs4_schedule_state_recovery(clp);
e005e804 3022 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3023 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3024 task->tk_status = 0;
3025 return -EAGAIN;
1da177e4 3026 case -NFS4ERR_DELAY:
2e96d286 3027 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3028 case -NFS4ERR_GRACE:
1da177e4
LT		 3029 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3030 task->tk_status = 0;
3031 return -EAGAIN;
3032 case -NFS4ERR_OLD_STATEID:
3033 task->tk_status = 0;
3034 return -EAGAIN;
3035 }
3036 task->tk_status = nfs4_map_errors(task->tk_status);
3037 return 0;
3038}
3039
adfa6f98 3040int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3041{
3042 nfs4_verifier sc_verifier;
3043 struct nfs4_setclientid setclientid = {
3044 .sc_verifier = &sc_verifier,
3045 .sc_prog = program,
3046 };
3047 struct rpc_message msg = {
3048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3049 .rpc_argp = &setclientid,
3050 .rpc_resp = clp,
286d7d6a 3051 .rpc_cred = cred,
1da177e4 3052 };
bc4785cd 3053 __be32 *p;
1da177e4
LT		 3054 int loop = 0;
3055 int status;
3056
bc4785cd 3057 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3058 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3059 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3060
3061 for(;;) {
3062 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3063 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3064 clp->cl_ipaddr,
3065 rpc_peeraddr2str(clp->cl_rpcclient,
3066 RPC_DISPLAY_ADDR),
69dd716c
TM		 3067 rpc_peeraddr2str(clp->cl_rpcclient,
3068 RPC_DISPLAY_PROTO),
78ea323b 3069 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3070 clp->cl_id_uniquifier);
3071 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3072 sizeof(setclientid.sc_netid),
3073 rpc_peeraddr2str(clp->cl_rpcclient,
3074 RPC_DISPLAY_NETID));
1da177e4 3075 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3076 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3077 clp->cl_ipaddr, port >> 8, port & 255);
3078
3079 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3080 if (status != -NFS4ERR_CLID_INUSE)
3081 break;
3082 if (signalled())
3083 break;
3084 if (loop++ & 1)
3085 ssleep(clp->cl_lease_time + 1);
3086 else
3087 if (++clp->cl_id_uniquifier == 0)
3088 break;
3089 }
3090 return status;
3091}
3092
adfa6f98 3093static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3094{
3095 struct nfs_fsinfo fsinfo;
3096 struct rpc_message msg = {
3097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3098 .rpc_argp = clp,
3099 .rpc_resp = &fsinfo,
286d7d6a 3100 .rpc_cred = cred,
1da177e4
LT		 3101 };
3102 unsigned long now;
3103 int status;
3104
3105 now = jiffies;
3106 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3107 if (status == 0) {
3108 spin_lock(&clp->cl_lock);
3109 clp->cl_lease_time = fsinfo.lease_time * HZ;
3110 clp->cl_last_renewal = now;
3111 spin_unlock(&clp->cl_lock);
3112 }
3113 return status;
3114}
3115
adfa6f98 3116int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3117{
77e03677 3118 long timeout = 0;
51581f3b
TM		 3119 int err;
3120 do {
3121 err = _nfs4_proc_setclientid_confirm(clp, cred);
3122 switch (err) {
3123 case 0:
3124 return err;
3125 case -NFS4ERR_RESOURCE:
3126 /* The IBM lawyers misread another document! */
3127 case -NFS4ERR_DELAY:
3128 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3129 }
3130 } while (err == 0);
3131 return err;
3132}
3133
fe650407
TM		 3134struct nfs4_delegreturndata {
3135 struct nfs4_delegreturnargs args;
fa178f29 3136 struct nfs4_delegreturnres res;
fe650407
TM		 3137 struct nfs_fh fh;
3138 nfs4_stateid stateid;
26e976a8 3139 unsigned long timestamp;
fa178f29 3140 struct nfs_fattr fattr;
fe650407
TM		 3141 int rpc_status;
3142};
3143
fe650407
TM		 3144static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3145{
3146 struct nfs4_delegreturndata *data = calldata;
3147 data->rpc_status = task->tk_status;
26e976a8 3148 if (data->rpc_status == 0)
fa178f29 3149 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3150}
3151
3152static void nfs4_delegreturn_release(void *calldata)
3153{
fe650407
TM		 3154 kfree(calldata);
3155}
3156
c8d149f3 3157static const struct rpc_call_ops nfs4_delegreturn_ops = {
fe650407
TM		 3158 .rpc_call_done = nfs4_delegreturn_done,
3159 .rpc_release = nfs4_delegreturn_release,
3160};
3161
e6f81075 3162static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3163{
3164 struct nfs4_delegreturndata *data;
fa178f29 3165 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3166 struct rpc_task *task;
5138fde0
TM		 3167 struct rpc_message msg = {
3168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3169 .rpc_cred = cred,
3170 };
c970aa85
TM		 3171 struct rpc_task_setup task_setup_data = {
3172 .rpc_client = server->client,
5138fde0 3173 .rpc_message = &msg,
c970aa85
TM		 3174 .callback_ops = &nfs4_delegreturn_ops,
3175 .flags = RPC_TASK_ASYNC,
3176 };
e6f81075 3177 int status = 0;
fe650407
TM		 3178
3179 data = kmalloc(sizeof(*data), GFP_KERNEL);
3180 if (data == NULL)
3181 return -ENOMEM;
3182 data->args.fhandle = &data->fh;
3183 data->args.stateid = &data->stateid;
fa178f29 3184 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3185 nfs_copy_fh(&data->fh, NFS_FH(inode));
3186 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3187 data->res.fattr = &data->fattr;
3188 data->res.server = server;
5f7dbd5c 3189 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3190 nfs_fattr_init(data->res.fattr);
26e976a8 3191 data->timestamp = jiffies;
fe650407
TM		 3192 data->rpc_status = 0;
3193
c970aa85 3194 task_setup_data.callback_data = data;
5138fde0
TM		 3195 msg.rpc_argp = &data->args,
3196 msg.rpc_resp = &data->res,
c970aa85 3197 task = rpc_run_task(&task_setup_data);
7a1218a2 3198 if (IS_ERR(task))
fe650407 3199 return PTR_ERR(task);
e6f81075
TM		 3200 if (!issync)
3201 goto out;
fe650407 3202 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3203 if (status != 0)
3204 goto out;
3205 status = data->rpc_status;
3206 if (status != 0)
3207 goto out;
3208 nfs_refresh_inode(inode, &data->fattr);
3209out:
e6b3c4db 3210 rpc_put_task(task);
fe650407 3211 return status;
1da177e4
LT		 3212}
3213
e6f81075 3214int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3215{
3216 struct nfs_server *server = NFS_SERVER(inode);
3217 struct nfs4_exception exception = { };
3218 int err;
3219 do {
e6f81075 3220 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3221 switch (err) {
3222 case -NFS4ERR_STALE_STATEID:
3223 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3224 case 0:
3225 return 0;
3226 }
3227 err = nfs4_handle_exception(server, err, &exception);
3228 } while (exception.retry);
3229 return err;
3230}
3231
3232#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3233#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3234
3235/*
3236 * sleep, with exponential backoff, and retry the LOCK operation.
3237 */
3238static unsigned long
3239nfs4_set_lock_task_retry(unsigned long timeout)
3240{
150030b7 3241 schedule_timeout_killable(timeout);
1da177e4
LT		 3242 timeout <<= 1;
3243 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3244 return NFS4_LOCK_MAXTIMEOUT;
3245 return timeout;
3246}
3247
1da177e4
LT		 3248static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3249{
3250 struct inode *inode = state->inode;
3251 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3252 struct nfs_client *clp = server->nfs_client;
911d1aaf 3253 struct nfs_lockt_args arg = {
1da177e4 3254 .fh = NFS_FH(inode),
911d1aaf 3255 .fl = request,
1da177e4 3256 };
911d1aaf
TM		 3257 struct nfs_lockt_res res = {
3258 .denied = request,
1da177e4
LT		 3259 };
3260 struct rpc_message msg = {
3261 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3262 .rpc_argp = &arg,
3263 .rpc_resp = &res,
3264 .rpc_cred = state->owner->so_cred,
3265 };
1da177e4
LT		 3266 struct nfs4_lock_state *lsp;
3267 int status;
3268
911d1aaf 3269 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3270 status = nfs4_set_lock_state(state, request);
3271 if (status != 0)
3272 goto out;
3273 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3274 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3275 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3276 switch (status) {
3277 case 0:
3278 request->fl_type = F_UNLCK;
3279 break;
3280 case -NFS4ERR_DENIED:
3281 status = 0;
1da177e4 3282 }
70cc6487 3283 request->fl_ops->fl_release_private(request);
8d0a8a9d 3284out:
1da177e4
LT		 3285 return status;
3286}
3287
3288static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3289{
3290 struct nfs4_exception exception = { };
3291 int err;
3292
3293 do {
3294 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3295 _nfs4_proc_getlk(state, cmd, request),
3296 &exception);
3297 } while (exception.retry);
3298 return err;
3299}
3300
3301static int do_vfs_lock(struct file *file, struct file_lock *fl)
3302{
3303 int res = 0;
3304 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3305 case FL_POSIX:
3306 res = posix_lock_file_wait(file, fl);
3307 break;
3308 case FL_FLOCK:
3309 res = flock_lock_file_wait(file, fl);
3310 break;
3311 default:
3312 BUG();
3313 }
1da177e4
LT		 3314 return res;
3315}
3316
faf5f49c 3317struct nfs4_unlockdata {
911d1aaf
TM		 3318 struct nfs_locku_args arg;
3319 struct nfs_locku_res res;
faf5f49c
TM		 3320 struct nfs4_lock_state *lsp;
3321 struct nfs_open_context *ctx;
911d1aaf
TM		 3322 struct file_lock fl;
3323 const struct nfs_server *server;
26e976a8 3324 unsigned long timestamp;
faf5f49c
TM		 3325};
3326
911d1aaf
TM		 3327static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3328 struct nfs_open_context *ctx,
3329 struct nfs4_lock_state *lsp,
3330 struct nfs_seqid *seqid)
3331{
3332 struct nfs4_unlockdata *p;
3333 struct inode *inode = lsp->ls_state->inode;
3334
3335 p = kmalloc(sizeof(*p), GFP_KERNEL);
3336 if (p == NULL)
3337 return NULL;
3338 p->arg.fh = NFS_FH(inode);
3339 p->arg.fl = &p->fl;
3340 p->arg.seqid = seqid;
c1d51931 3341 p->res.seqid = seqid;
5f7dbd5c 3342 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3343 p->arg.stateid = &lsp->ls_stateid;
3344 p->lsp = lsp;
3345 atomic_inc(&lsp->ls_count);
3346 /* Ensure we don't close file until we're done freeing locks! */
3347 p->ctx = get_nfs_open_context(ctx);
3348 memcpy(&p->fl, fl, sizeof(p->fl));
3349 p->server = NFS_SERVER(inode);
3350 return p;
3351}
3352
06f814a3 3353static void nfs4_locku_release_calldata(void *data)
faf5f49c 3354{
963d8fe5 3355 struct nfs4_unlockdata *calldata = data;
911d1aaf 3356 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3357 nfs4_put_lock_state(calldata->lsp);
3358 put_nfs_open_context(calldata->ctx);
3359 kfree(calldata);
faf5f49c
TM		 3360}
3361
963d8fe5 3362static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3363{
963d8fe5 3364 struct nfs4_unlockdata *calldata = data;
faf5f49c 3365
06f814a3
TM		 3366 if (RPC_ASSASSINATED(task))
3367 return;
faf5f49c
TM		 3368 switch (task->tk_status) {
3369 case 0:
3370 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3371 calldata->res.stateid.data,
faf5f49c 3372 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3373 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3374 break;
9e33bed5
TM		 3375 case -NFS4ERR_BAD_STATEID:
3376 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3377 case -NFS4ERR_STALE_STATEID:
3378 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3379 break;
3380 default:
9e33bed5 3381 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
faf5f49c 3382 rpc_restart_call(task);
faf5f49c 3383 }
faf5f49c
TM		 3384}
3385
4ce70ada 3386static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3387{
4ce70ada 3388 struct nfs4_unlockdata *calldata = data;
faf5f49c 3389
911d1aaf 3390 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3391 return;
3392 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3393 /* Note: exit _without_ running nfs4_locku_done */
3394 task->tk_action = NULL;
faf5f49c
TM		 3395 return;
3396 }
26e976a8 3397 calldata->timestamp = jiffies;
5138fde0 3398 rpc_call_start(task);
faf5f49c
TM		 3399}
3400
963d8fe5 3401static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3402 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3403 .rpc_call_done = nfs4_locku_done,
06f814a3 3404 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3405};
3406
a5d16a4d
TM		 3407static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3408 struct nfs_open_context *ctx,
3409 struct nfs4_lock_state *lsp,
3410 struct nfs_seqid *seqid)
3411{
3412 struct nfs4_unlockdata *data;
5138fde0
TM		 3413 struct rpc_message msg = {
3414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3415 .rpc_cred = ctx->cred,
3416 };
c970aa85
TM		 3417 struct rpc_task_setup task_setup_data = {
3418 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3419 .rpc_message = &msg,
c970aa85 3420 .callback_ops = &nfs4_locku_ops,
101070ca 3421 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3422 .flags = RPC_TASK_ASYNC,
3423 };
a5d16a4d 3424
137d6aca
FF		 3425 /* Ensure this is an unlock - when canceling a lock, the
3426 * canceled lock is passed in, and it won't be an unlock.
3427 */
3428 fl->fl_type = F_UNLCK;
3429
a5d16a4d
TM		 3430 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3431 if (data == NULL) {
3432 nfs_free_seqid(seqid);
3433 return ERR_PTR(-ENOMEM);
3434 }
3435
5138fde0
TM		 3436 msg.rpc_argp = &data->arg,
3437 msg.rpc_resp = &data->res,
c970aa85
TM		 3438 task_setup_data.callback_data = data;
3439 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3440}
3441
faf5f49c
TM		 3442static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3443{
19e03c57 3444 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3445 struct nfs_seqid *seqid;
1da177e4 3446 struct nfs4_lock_state *lsp;
06f814a3
TM		 3447 struct rpc_task *task;
3448 int status = 0;
536ff0f8 3449 unsigned char fl_flags = request->fl_flags;
faf5f49c 3450
8d0a8a9d 3451 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3452 /* Unlock _before_ we do the RPC call */
3453 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3454 down_read(&nfsi->rwsem);
3455 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3456 up_read(&nfsi->rwsem);
9b073574 3457 goto out;
19e03c57
TM		 3458 }
3459 up_read(&nfsi->rwsem);
8d0a8a9d 3460 if (status != 0)
9b073574
TM		 3461 goto out;
3462 /* Is this a delegated lock? */
3463 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3464 goto out;
8d0a8a9d 3465 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3466 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3467 status = -ENOMEM;
911d1aaf 3468 if (seqid == NULL)
9b073574 3469 goto out;
cd3758e3 3470 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3471 status = PTR_ERR(task);
3472 if (IS_ERR(task))
9b073574 3473 goto out;
a5d16a4d 3474 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3475 rpc_put_task(task);
9b073574 3476out:
536ff0f8 3477 request->fl_flags = fl_flags;
1da177e4
LT		 3478 return status;
3479}
3480
a5d16a4d
TM		 3481struct nfs4_lockdata {
3482 struct nfs_lock_args arg;
3483 struct nfs_lock_res res;
3484 struct nfs4_lock_state *lsp;
3485 struct nfs_open_context *ctx;
3486 struct file_lock fl;
26e976a8 3487 unsigned long timestamp;
a5d16a4d
TM		 3488 int rpc_status;
3489 int cancelled;
3490};
3491
3492static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3493 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3494{
a5d16a4d
TM		 3495 struct nfs4_lockdata *p;
3496 struct inode *inode = lsp->ls_state->inode;
1da177e4 3497 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3498
3499 p = kzalloc(sizeof(*p), GFP_KERNEL);
3500 if (p == NULL)
3501 return NULL;
3502
3503 p->arg.fh = NFS_FH(inode);
3504 p->arg.fl = &p->fl;
2f74c0a0
TM		 3505 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3506 if (p->arg.open_seqid == NULL)
3507 goto out_free;
a5d16a4d
TM		 3508 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3509 if (p->arg.lock_seqid == NULL)
2f74c0a0 3510 goto out_free_seqid;
a5d16a4d 3511 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3512 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3513 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3514 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3515 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d
TM		 3516 p->lsp = lsp;
3517 atomic_inc(&lsp->ls_count);
3518 p->ctx = get_nfs_open_context(ctx);
3519 memcpy(&p->fl, fl, sizeof(p->fl));
3520 return p;
2f74c0a0
TM		 3521out_free_seqid:
3522 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3523out_free:
3524 kfree(p);
3525 return NULL;
3526}
3527
3528static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3529{
3530 struct nfs4_lockdata *data = calldata;
3531 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3532
3110ff80 3533 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3534 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3535 return;
a5d16a4d
TM		 3536 /* Do we need to do an open_to_lock_owner? */
3537 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3538 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3539 return;
a5d16a4d
TM		 3540 data->arg.open_stateid = &state->stateid;
3541 data->arg.new_lock_owner = 1;
c1d51931 3542 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3543 } else
3544 data->arg.new_lock_owner = 0;
26e976a8 3545 data->timestamp = jiffies;
5138fde0 3546 rpc_call_start(task);
3110ff80 3547 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3548}
3549
3550static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3551{
3552 struct nfs4_lockdata *data = calldata;
3553
3110ff80 3554 dprintk("%s: begin!\n", __func__);
a5d16a4d
TM		 3555
3556 data->rpc_status = task->tk_status;
3557 if (RPC_ASSASSINATED(task))
3558 goto out;
3559 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3560 if (data->rpc_status == 0)
3561 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3562 else
3563 goto out;
3564 }
3565 if (data->rpc_status == 0) {
3566 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3567 sizeof(data->lsp->ls_stateid.data));
3568 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3569 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3570 }
a5d16a4d 3571out:
3110ff80 3572 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3573}
3574
3575static void nfs4_lock_release(void *calldata)
3576{
3577 struct nfs4_lockdata *data = calldata;
3578
3110ff80 3579 dprintk("%s: begin!\n", __func__);
2f74c0a0 3580 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3581 if (data->cancelled != 0) {
3582 struct rpc_task *task;
3583 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3584 data->arg.lock_seqid);
3585 if (!IS_ERR(task))
e6b3c4db 3586 rpc_put_task(task);
3110ff80 3587 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3588 } else
3589 nfs_free_seqid(data->arg.lock_seqid);
3590 nfs4_put_lock_state(data->lsp);
3591 put_nfs_open_context(data->ctx);
3592 kfree(data);
3110ff80 3593 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3594}
3595
3596static const struct rpc_call_ops nfs4_lock_ops = {
3597 .rpc_call_prepare = nfs4_lock_prepare,
3598 .rpc_call_done = nfs4_lock_done,
3599 .rpc_release = nfs4_lock_release,
3600};
3601
3602static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3603{
3604 struct nfs4_lockdata *data;
3605 struct rpc_task *task;
5138fde0
TM		 3606 struct rpc_message msg = {
3607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3608 .rpc_cred = state->owner->so_cred,
3609 };
c970aa85
TM		 3610 struct rpc_task_setup task_setup_data = {
3611 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3612 .rpc_message = &msg,
c970aa85 3613 .callback_ops = &nfs4_lock_ops,
101070ca 3614 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3615 .flags = RPC_TASK_ASYNC,
3616 };
a5d16a4d
TM		 3617 int ret;
3618
3110ff80 3619 dprintk("%s: begin!\n", __func__);
cd3758e3 3620 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3621 fl->fl_u.nfs4_fl.owner);
3622 if (data == NULL)
3623 return -ENOMEM;
3624 if (IS_SETLKW(cmd))
3625 data->arg.block = 1;
3626 if (reclaim != 0)
3627 data->arg.reclaim = 1;
5138fde0
TM		 3628 msg.rpc_argp = &data->arg,
3629 msg.rpc_resp = &data->res,
c970aa85
TM		 3630 task_setup_data.callback_data = data;
3631 task = rpc_run_task(&task_setup_data);
7a1218a2 3632 if (IS_ERR(task))
a5d16a4d 3633 return PTR_ERR(task);
a5d16a4d
TM		 3634 ret = nfs4_wait_for_completion_rpc_task(task);
3635 if (ret == 0) {
3636 ret = data->rpc_status;
3637 if (ret == -NFS4ERR_DENIED)
3638 ret = -EAGAIN;
3639 } else
3640 data->cancelled = 1;
e6b3c4db 3641 rpc_put_task(task);
3110ff80 3642 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3643 return ret;
1da177e4
LT		 3644}
3645
3646static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3647{
202b50dc
TM		 3648 struct nfs_server *server = NFS_SERVER(state->inode);
3649 struct nfs4_exception exception = { };
3650 int err;
3651
3652 do {
42a2d13e
TM		 3653 /* Cache the lock if possible... */
3654 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3655 return 0;
202b50dc
TM		 3656 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3657 if (err != -NFS4ERR_DELAY)
3658 break;
3659 nfs4_handle_exception(server, err, &exception);
3660 } while (exception.retry);
3661 return err;
1da177e4
LT		 3662}
3663
3664static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3665{
202b50dc
TM		 3666 struct nfs_server *server = NFS_SERVER(state->inode);
3667 struct nfs4_exception exception = { };
3668 int err;
3669
6bfc93ef
TM		 3670 err = nfs4_set_lock_state(state, request);
3671 if (err != 0)
3672 return err;
202b50dc 3673 do {
42a2d13e
TM		 3674 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3675 return 0;
202b50dc
TM		 3676 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3677 if (err != -NFS4ERR_DELAY)
3678 break;
3679 nfs4_handle_exception(server, err, &exception);
3680 } while (exception.retry);
3681 return err;
1da177e4
LT		 3682}
3683
3684static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3685{
19e03c57 3686 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 3687 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 3688 int status;
3689
6bfc93ef 3690 /* Is this a delegated open? */
6bfc93ef
TM		 3691 status = nfs4_set_lock_state(state, request);
3692 if (status != 0)
3693 goto out;
01c3b861
TM		 3694 request->fl_flags |= FL_ACCESS;
3695 status = do_vfs_lock(request->fl_file, request);
3696 if (status < 0)
3697 goto out;
19e03c57 3698 down_read(&nfsi->rwsem);
01c3b861 3699 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 3700 /* Yes: cache locks! */
01c3b861 3701 /* ...but avoid races with delegation recall... */
19e03c57
TM		 3702 request->fl_flags = fl_flags & ~FL_SLEEP;
3703 status = do_vfs_lock(request->fl_file, request);
3704 goto out_unlock;
01c3b861 3705 }
6bfc93ef
TM		 3706 status = _nfs4_do_setlk(state, cmd, request, 0);
3707 if (status != 0)
01c3b861 3708 goto out_unlock;
6bfc93ef 3709 /* Note: we always want to sleep here! */
01c3b861 3710 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 3711 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 3712 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 3713out_unlock:
19e03c57 3714 up_read(&nfsi->rwsem);
01c3b861
TM		 3715out:
3716 request->fl_flags = fl_flags;
1da177e4
LT		 3717 return status;
3718}
3719
3720static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3721{
3722 struct nfs4_exception exception = { };
3723 int err;
3724
3725 do {
3726 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3727 _nfs4_proc_setlk(state, cmd, request),
3728 &exception);
3729 } while (exception.retry);
3730 return err;
3731}
3732
3733static int
3734nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3735{
3736 struct nfs_open_context *ctx;
3737 struct nfs4_state *state;
3738 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3739 int status;
3740
3741 /* verify open state */
cd3758e3 3742 ctx = nfs_file_open_context(filp);
1da177e4
LT		 3743 state = ctx->state;
3744
3745 if (request->fl_start < 0 || request->fl_end < 0)
3746 return -EINVAL;
3747
3748 if (IS_GETLK(cmd))
3749 return nfs4_proc_getlk(state, F_GETLK, request);
3750
3751 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3752 return -EINVAL;
3753
3754 if (request->fl_type == F_UNLCK)
3755 return nfs4_proc_unlck(state, cmd, request);
3756
3757 do {
3758 status = nfs4_proc_setlk(state, cmd, request);
3759 if ((status != -EAGAIN) || IS_SETLK(cmd))
3760 break;
3761 timeout = nfs4_set_lock_task_retry(timeout);
3762 status = -ERESTARTSYS;
3763 if (signalled())
3764 break;
3765 } while(status < 0);
1da177e4
LT		 3766 return status;
3767}
3768
888e694c
TM		 3769int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3770{
3771 struct nfs_server *server = NFS_SERVER(state->inode);
3772 struct nfs4_exception exception = { };
3773 int err;
3774
3775 err = nfs4_set_lock_state(state, fl);
3776 if (err != 0)
3777 goto out;
3778 do {
3779 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3780 if (err != -NFS4ERR_DELAY)
3781 break;
3782 err = nfs4_handle_exception(server, err, &exception);
3783 } while (exception.retry);
3784out:
3785 return err;
3786}
6b3b5496 3787
aa1870af
BF		 3788#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3789
6b3b5496
BF		 3790int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3791 size_t buflen, int flags)
3792{
4b580ee3
BF		 3793 struct inode *inode = dentry->d_inode;
3794
3795 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3796 return -EOPNOTSUPP;
3797
4b580ee3 3798 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3799}
3800
3801/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3802 * and that's what we'll do for e.g. user attributes that haven't been set.
3803 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3804 * attributes in kernel-managed attribute namespaces. */
3805ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3806 size_t buflen)
3807{
aa1870af
BF		 3808 struct inode *inode = dentry->d_inode;
3809
3810 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3811 return -EOPNOTSUPP;
3812
3813 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3814}
3815
3816ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3817{
aa1870af 3818 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 3819
096455a2
BF		 3820 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3821 return 0;
6b3b5496
BF		 3822 if (buf && buflen < len)
3823 return -ERANGE;
3824 if (buf)
aa1870af
BF		 3825 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3826 return len;
6b3b5496
BF		 3827}
3828
69aaaae1
TM		 3829static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
3830{
3831 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
3832 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
3833 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
3834 return;
3835
3836 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3837 NFS_ATTR_FATTR_NLINK;
3838 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3839 fattr->nlink = 2;
3840}
3841
56659e99 3842int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 3843 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 3844{
3845 struct nfs_server *server = NFS_SERVER(dir);
3846 u32 bitmask[2] = {
361e624f
MN		 3847 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3848 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 3849 };
3850 struct nfs4_fs_locations_arg args = {
3851 .dir_fh = NFS_FH(dir),
c228fd3a 3852 .name = name,
683b57b4
TM		 3853 .page = page,
3854 .bitmask = bitmask,
3855 };
22958463
BH		 3856 struct nfs4_fs_locations_res res = {
3857 .fs_locations = fs_locations,
3858 };
683b57b4
TM		 3859 struct rpc_message msg = {
3860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3861 .rpc_argp = &args,
22958463 3862 .rpc_resp = &res,
683b57b4
TM		 3863 };
3864 int status;
3865
3110ff80 3866 dprintk("%s: start\n", __func__);
c228fd3a 3867 nfs_fattr_init(&fs_locations->fattr);
683b57b4 3868 fs_locations->server = server;
830b8e33 3869 fs_locations->nlocations = 0;
cccef3b9 3870 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 3871 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 3872 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 3873 return status;
3874}
3875
557134a3
AA		 3876#ifdef CONFIG_NFS_V4_1
3877/* Destroy the slot table */
3878static void nfs4_destroy_slot_table(struct nfs4_session *session)
3879{
3880 if (session->fc_slot_table.slots == NULL)
3881 return;
3882 kfree(session->fc_slot_table.slots);
3883 session->fc_slot_table.slots = NULL;
3884 return;
3885}
3886
3887struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
3888{
3889 struct nfs4_session *session;
3890 struct nfs4_slot_table *tbl;
3891
3892 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
3893 if (!session)
3894 return NULL;
3895 tbl = &session->fc_slot_table;
3896 spin_lock_init(&tbl->slot_tbl_lock);
3897 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table");
3898 session->clp = clp;
3899 return session;
3900}
3901
3902void nfs4_destroy_session(struct nfs4_session *session)
3903{
3904 nfs4_destroy_slot_table(session);
3905 kfree(session);
3906}
3907
3908#endif /* CONFIG_NFS_V4_1 */
3909
1da177e4 3910struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
7eff03ae 3911 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 3912 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 3913 .recover_open = nfs4_open_reclaim,
3914 .recover_lock = nfs4_lock_reclaim,
3915};
3916
b79a4a1b 3917struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
7eff03ae 3918 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 3919 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 3920 .recover_open = nfs4_open_expired,
3921 .recover_lock = nfs4_lock_expired,
3922};
3923
92e1d5be 3924static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 3925 .permission = nfs_permission,
3926 .getattr = nfs_getattr,
3927 .setattr = nfs_setattr,
3928 .getxattr = nfs4_getxattr,
3929 .setxattr = nfs4_setxattr,
3930 .listxattr = nfs4_listxattr,
3931};
3932
509de811 3933const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 3934 .version = 4, /* protocol version */
3935 .dentry_ops = &nfs4_dentry_operations,
3936 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3937 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3938 .getroot = nfs4_proc_get_root,
3939 .getattr = nfs4_proc_getattr,
3940 .setattr = nfs4_proc_setattr,
2b3de441 3941 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 3942 .lookup = nfs4_proc_lookup,
3943 .access = nfs4_proc_access,
3944 .readlink = nfs4_proc_readlink,
1da177e4
LT		 3945 .create = nfs4_proc_create,
3946 .remove = nfs4_proc_remove,
3947 .unlink_setup = nfs4_proc_unlink_setup,
3948 .unlink_done = nfs4_proc_unlink_done,
3949 .rename = nfs4_proc_rename,
3950 .link = nfs4_proc_link,
3951 .symlink = nfs4_proc_symlink,
3952 .mkdir = nfs4_proc_mkdir,
3953 .rmdir = nfs4_proc_remove,
3954 .readdir = nfs4_proc_readdir,
3955 .mknod = nfs4_proc_mknod,
3956 .statfs = nfs4_proc_statfs,
3957 .fsinfo = nfs4_proc_fsinfo,
3958 .pathconf = nfs4_proc_pathconf,
e9326dca 3959 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 3960 .decode_dirent = nfs4_decode_dirent,
3961 .read_setup = nfs4_proc_read_setup,
ec06c096 3962 .read_done = nfs4_read_done,
1da177e4 3963 .write_setup = nfs4_proc_write_setup,
788e7a89 3964 .write_done = nfs4_write_done,
1da177e4 3965 .commit_setup = nfs4_proc_commit_setup,
788e7a89 3966 .commit_done = nfs4_commit_done,
1da177e4 3967 .lock = nfs4_proc_lock,
e50a1c2e 3968 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 3969 .close_context = nfs4_close_context,
1da177e4
LT		 3970};
3971
3972/*
3973 * Local variables:
3974 * c-basic-offset: 8
3975 * End:
3976 */
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