projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFS: Reduce stack footprint of nfs_readdir()
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
5a0e3ad6 42#include <linux/slab.h>
1da177e4
LT		 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>
1da177e4 48#include <linux/namei.h>
02a913a7 49#include <linux/mount.h>
99fe60d0 50#include <linux/module.h>
5a0ffe54 51#include <linux/sunrpc/bc_xprt.h>
1da177e4 52
4ce79717 53#include "nfs4_fs.h"
1da177e4 54#include "delegation.h"
101070ca 55#include "internal.h"
006ea73e 56#include "iostat.h"
fc931582 57#include "callback.h"
1da177e4
LT		 58
59#define NFSDBG_FACILITY NFSDBG_PROC
60
2066fe89 61#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 62#define NFS4_POLL_RETRY_MAX (15*HZ)
63
a78cb57a
TM		 64#define NFS4_MAX_LOOP_ON_RECOVER (10)
65
cdd4e68b 66struct nfs4_opendata;
864472e9 67static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 68static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 69static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 70static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 71static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
72static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 73
1da177e4 74/* Prevent leaks of NFSv4 errors into userland */
46f72f57 75static int nfs4_map_errors(int err)
1da177e4 76{
52567b03
TM		 77 if (err >= -1000)
78 return err;
79 switch (err) {
80 case -NFS4ERR_RESOURCE:
81 return -EREMOTEIO;
82 default:
1da177e4 83 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 84 __func__, -err);
52567b03 85 break;
1da177e4 86 }
52567b03 87 return -EIO;
1da177e4
LT		 88}
89
90/*
91 * This is our standard bitmap for GETATTR requests.
92 */
93const u32 nfs4_fattr_bitmap[2] = {
94 FATTR4_WORD0_TYPE
95 | FATTR4_WORD0_CHANGE
96 | FATTR4_WORD0_SIZE
97 | FATTR4_WORD0_FSID
98 | FATTR4_WORD0_FILEID,
99 FATTR4_WORD1_MODE
100 | FATTR4_WORD1_NUMLINKS
101 | FATTR4_WORD1_OWNER
102 | FATTR4_WORD1_OWNER_GROUP
103 | FATTR4_WORD1_RAWDEV
104 | FATTR4_WORD1_SPACE_USED
105 | FATTR4_WORD1_TIME_ACCESS
106 | FATTR4_WORD1_TIME_METADATA
107 | FATTR4_WORD1_TIME_MODIFY
108};
109
110const u32 nfs4_statfs_bitmap[2] = {
111 FATTR4_WORD0_FILES_AVAIL
112 | FATTR4_WORD0_FILES_FREE
113 | FATTR4_WORD0_FILES_TOTAL,
114 FATTR4_WORD1_SPACE_AVAIL
115 | FATTR4_WORD1_SPACE_FREE
116 | FATTR4_WORD1_SPACE_TOTAL
117};
118
4ce79717 119const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 120 FATTR4_WORD0_MAXLINK
121 | FATTR4_WORD0_MAXNAME,
122 0
123};
124
125const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
126 | FATTR4_WORD0_MAXREAD
127 | FATTR4_WORD0_MAXWRITE
128 | FATTR4_WORD0_LEASE_TIME,
129 0
130};
131
830b8e33
MN		 132const u32 nfs4_fs_locations_bitmap[2] = {
133 FATTR4_WORD0_TYPE
134 | FATTR4_WORD0_CHANGE
135 | FATTR4_WORD0_SIZE
136 | FATTR4_WORD0_FSID
137 | FATTR4_WORD0_FILEID
138 | FATTR4_WORD0_FS_LOCATIONS,
139 FATTR4_WORD1_MODE
140 | FATTR4_WORD1_NUMLINKS
141 | FATTR4_WORD1_OWNER
142 | FATTR4_WORD1_OWNER_GROUP
143 | FATTR4_WORD1_RAWDEV
144 | FATTR4_WORD1_SPACE_USED
145 | FATTR4_WORD1_TIME_ACCESS
146 | FATTR4_WORD1_TIME_METADATA
147 | FATTR4_WORD1_TIME_MODIFY
148 | FATTR4_WORD1_MOUNTED_ON_FILEID
149};
150
bc4785cd 151static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 152 struct nfs4_readdir_arg *readdir)
153{
0dbb4c67 154 __be32 *start, *p;
1da177e4
LT		 155
156 BUG_ON(readdir->count < 80);
157 if (cookie > 2) {
b7ef1956 158 readdir->cookie = cookie;
1da177e4
LT		 159 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
160 return;
161 }
162
163 readdir->cookie = 0;
164 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
165 if (cookie == 2)
166 return;
167
168 /*
169 * NFSv4 servers do not return entries for '.' and '..'
170 * Therefore, we fake these entries here. We let '.'
171 * have cookie 0 and '..' have cookie 1. Note that
172 * when talking to the server, we always send cookie 0
173 * instead of 1 or 2.
174 */
0dbb4c67 175 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 176
177 if (cookie == 0) {
178 *p++ = xdr_one; /* next */
179 *p++ = xdr_zero; /* cookie, first word */
180 *p++ = xdr_one; /* cookie, second word */
181 *p++ = xdr_one; /* entry len */
182 memcpy(p, ".\0\0\0", 4); /* entry */
183 p++;
184 *p++ = xdr_one; /* bitmap length */
185 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
186 *p++ = htonl(8); /* attribute buffer length */
4e769b93 187 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 188 }
189
190 *p++ = xdr_one; /* next */
191 *p++ = xdr_zero; /* cookie, first word */
192 *p++ = xdr_two; /* cookie, second word */
193 *p++ = xdr_two; /* entry len */
194 memcpy(p, "..\0\0", 4); /* entry */
195 p++;
196 *p++ = xdr_one; /* bitmap length */
197 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
198 *p++ = htonl(8); /* attribute buffer length */
4e769b93 199 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 200
201 readdir->pgbase = (char *)p - (char *)start;
202 readdir->count -= readdir->pgbase;
203 kunmap_atomic(start, KM_USER0);
204}
205
65de872e
TM		 206static int nfs4_wait_clnt_recover(struct nfs_client *clp)
207{
208 int res;
209
210 might_sleep();
211
e005e804 212 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 213 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 214 return res;
215}
216
217static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
218{
219 int res = 0;
220
221 might_sleep();
222
223 if (*timeout <= 0)
224 *timeout = NFS4_POLL_RETRY_MIN;
225 if (*timeout > NFS4_POLL_RETRY_MAX)
226 *timeout = NFS4_POLL_RETRY_MAX;
227 schedule_timeout_killable(*timeout);
228 if (fatal_signal_pending(current))
229 res = -ERESTARTSYS;
230 *timeout <<= 1;
231 return res;
232}
233
234/* This is the error handling routine for processes that are allowed
235 * to sleep.
236 */
237static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
238{
239 struct nfs_client *clp = server->nfs_client;
9e33bed5 240 struct nfs4_state *state = exception->state;
65de872e
TM		 241 int ret = errorcode;
242
243 exception->retry = 0;
244 switch(errorcode) {
245 case 0:
246 return 0;
9e33bed5
TM		 247 case -NFS4ERR_ADMIN_REVOKED:
248 case -NFS4ERR_BAD_STATEID:
249 case -NFS4ERR_OPENMODE:
250 if (state == NULL)
251 break;
252 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 253 goto do_state_recovery;
65de872e 254 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 255 if (state == NULL)
256 break;
257 nfs4_state_mark_reclaim_reboot(clp, state);
258 case -NFS4ERR_STALE_CLIENTID:
65de872e 259 case -NFS4ERR_EXPIRED:
a2c0b9e2 260 goto do_state_recovery;
03391693 261#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 262 case -NFS4ERR_BADSESSION:
263 case -NFS4ERR_BADSLOT:
264 case -NFS4ERR_BAD_HIGH_SLOT:
265 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
266 case -NFS4ERR_DEADSESSION:
267 case -NFS4ERR_SEQ_FALSE_RETRY:
268 case -NFS4ERR_SEQ_MISORDERED:
269 dprintk("%s ERROR: %d Reset session\n", __func__,
270 errorcode);
0b9e2d41 271 nfs4_schedule_state_recovery(clp);
4745e315 272 exception->retry = 1;
b9179237 273 break;
03391693 274#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 275 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 276 if (exception->timeout > HZ) {
277 /* We have retried a decent amount, time to
278 * fail
279 */
280 ret = -EBUSY;
281 break;
282 }
65de872e
TM		 283 case -NFS4ERR_GRACE:
284 case -NFS4ERR_DELAY:
2c643488 285 case -EKEYEXPIRED:
65de872e
TM		 286 ret = nfs4_delay(server->client, &exception->timeout);
287 if (ret != 0)
288 break;
289 case -NFS4ERR_OLD_STATEID:
290 exception->retry = 1;
291 }
292 /* We failed to handle the error */
293 return nfs4_map_errors(ret);
a2c0b9e2
TM		 294do_state_recovery:
295 nfs4_schedule_state_recovery(clp);
296 ret = nfs4_wait_clnt_recover(clp);
297 if (ret == 0)
298 exception->retry = 1;
299 return ret;
65de872e
TM		 300}
301
302
26e976a8 303static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 304{
7539bbab 305 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 306 spin_lock(&clp->cl_lock);
307 if (time_before(clp->cl_last_renewal,timestamp))
308 clp->cl_last_renewal = timestamp;
309 spin_unlock(&clp->cl_lock);
310}
311
cccef3b9
AA		 312#if defined(CONFIG_NFS_V4_1)
313
e2c4ab3c
AA		 314/*
315 * nfs4_free_slot - free a slot and efficiently update slot table.
316 *
317 * freeing a slot is trivially done by clearing its respective bit
318 * in the bitmap.
319 * If the freed slotid equals highest_used_slotid we want to update it
320 * so that the server would be able to size down the slot table if needed,
321 * otherwise we know that the highest_used_slotid is still in use.
322 * When updating highest_used_slotid there may be "holes" in the bitmap
323 * so we need to scan down from highest_used_slotid to 0 looking for the now
324 * highest slotid in use.
325 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 326 *
327 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 328 */
329static void
330nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
331{
332 int slotid = free_slotid;
333
e2c4ab3c
AA		 334 /* clear used bit in bitmap */
335 __clear_bit(slotid, tbl->used_slots);
336
337 /* update highest_used_slotid when it is freed */
338 if (slotid == tbl->highest_used_slotid) {
339 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 340 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 341 tbl->highest_used_slotid = slotid;
342 else
343 tbl->highest_used_slotid = -1;
344 }
e2c4ab3c
AA		 345 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
346 free_slotid, tbl->highest_used_slotid);
347}
348
3bfb0fc5
AB		 349/*
350 * Signal state manager thread if session is drained
351 */
352static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
353{
689cf5c1
AB		 354 struct rpc_task *task;
355
3bfb0fc5 356 if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
689cf5c1
AB		 357 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
358 if (task)
359 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 360 return;
361 }
362
363 if (ses->fc_slot_table.highest_used_slotid != -1)
364 return;
365
366 dprintk("%s COMPLETE: Session Drained\n", __func__);
367 complete(&ses->complete);
368}
369
d61e612a 370static void nfs41_sequence_free_slot(const struct nfs_client *clp,
13615871
AA		 371 struct nfs4_sequence_res *res)
372{
373 struct nfs4_slot_table *tbl;
374
13615871
AA		 375 tbl = &clp->cl_session->fc_slot_table;
376 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 377 /* just wake up the next guy waiting since
378 * we may have not consumed a slot after all */
691daf3b 379 dprintk("%s: No slot\n", __func__);
35dc1d74 380 return;
13615871 381 }
ea028ac9 382
35dc1d74
TM		 383 spin_lock(&tbl->slot_tbl_lock);
384 nfs4_free_slot(tbl, res->sr_slotid);
3bfb0fc5 385 nfs41_check_drain_session_complete(clp->cl_session);
35dc1d74
TM		 386 spin_unlock(&tbl->slot_tbl_lock);
387 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 388}
389
b0df806c
AA		 390static void nfs41_sequence_done(struct nfs_client *clp,
391 struct nfs4_sequence_res *res,
392 int rpc_status)
393{
394 unsigned long timestamp;
395 struct nfs4_slot_table *tbl;
396 struct nfs4_slot *slot;
397
398 /*
399 * sr_status remains 1 if an RPC level error occurred. The server
400 * may or may not have processed the sequence operation..
401 * Proceed as if the server received and processed the sequence
402 * operation.
403 */
404 if (res->sr_status == 1)
405 res->sr_status = NFS_OK;
406
407 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
408 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
409 goto out;
410
691daf3b 411 /* Check the SEQUENCE operation status */
b0df806c 412 if (res->sr_status == 0) {
691daf3b
AA		 413 tbl = &clp->cl_session->fc_slot_table;
414 slot = tbl->slots + res->sr_slotid;
b0df806c
AA		 415 /* Update the slot's sequence and clientid lease timer */
416 ++slot->seq_nr;
417 timestamp = res->sr_renewal_time;
418 spin_lock(&clp->cl_lock);
419 if (time_before(clp->cl_last_renewal, timestamp))
420 clp->cl_last_renewal = timestamp;
421 spin_unlock(&clp->cl_lock);
0629e370 422 /* Check sequence flags */
7135840f
AB		 423 if (atomic_read(&clp->cl_count) > 1)
424 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
b0df806c
AA		 425 }
426out:
427 /* The session may be reset by one of the error handlers. */
428 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
429 nfs41_sequence_free_slot(clp, res);
430}
431
510b8175
BH		 432/*
433 * nfs4_find_slot - efficiently look for a free slot
434 *
435 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
436 * If found, we mark the slot as used, update the highest_used_slotid,
437 * and respectively set up the sequence operation args.
438 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 439 *
440 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 441 */
442static u8
40ead580 443nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 444{
445 int slotid;
446 u8 ret_id = NFS4_MAX_SLOT_TABLE;
447 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
448
510b8175
BH		 449 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
450 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
451 tbl->max_slots);
452 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
453 if (slotid >= tbl->max_slots)
454 goto out;
455 __set_bit(slotid, tbl->used_slots);
456 if (slotid > tbl->highest_used_slotid)
457 tbl->highest_used_slotid = slotid;
458 ret_id = slotid;
459out:
460 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
461 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 462 return ret_id;
463}
464
ce5039c1
AA		 465static int nfs41_setup_sequence(struct nfs4_session *session,
466 struct nfs4_sequence_args *args,
467 struct nfs4_sequence_res *res,
468 int cache_reply,
469 struct rpc_task *task)
470{
fbcd4abc
AA		 471 struct nfs4_slot *slot;
472 struct nfs4_slot_table *tbl;
473 u8 slotid;
474
475 dprintk("--> %s\n", __func__);
ce5039c1
AA		 476 /* slot already allocated? */
477 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
478 return 0;
479
480 memset(res, 0, sizeof(*res));
481 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 482 tbl = &session->fc_slot_table;
483
484 spin_lock(&tbl->slot_tbl_lock);
5601a00d
AB		 485 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
486 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 487 /*
488 * The state manager will wait until the slot table is empty.
489 * Schedule the reset thread
490 */
05f0d236 491 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 492 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 493 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 494 return -EAGAIN;
b069d94a
AA		 495 }
496
689cf5c1
AB		 497 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
498 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
499 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
500 spin_unlock(&tbl->slot_tbl_lock);
501 dprintk("%s enforce FIFO order\n", __func__);
502 return -EAGAIN;
503 }
504
40ead580 505 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 506 if (slotid == NFS4_MAX_SLOT_TABLE) {
507 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
508 spin_unlock(&tbl->slot_tbl_lock);
509 dprintk("<-- %s: no free slots\n", __func__);
510 return -EAGAIN;
511 }
512 spin_unlock(&tbl->slot_tbl_lock);
513
689cf5c1 514 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 515 slot = tbl->slots + slotid;
99fe60d0 516 args->sa_session = session;
fbcd4abc
AA		 517 args->sa_slotid = slotid;
518 args->sa_cache_this = cache_reply;
519
520 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
521
99fe60d0 522 res->sr_session = session;
fbcd4abc
AA		 523 res->sr_slotid = slotid;
524 res->sr_renewal_time = jiffies;
525 /*
526 * sr_status is only set in decode_sequence, and so will remain
527 * set to 1 if an rpc level failure occurs.
528 */
529 res->sr_status = 1;
ce5039c1
AA		 530 return 0;
531}
532
533int nfs4_setup_sequence(struct nfs_client *clp,
534 struct nfs4_sequence_args *args,
535 struct nfs4_sequence_res *res,
536 int cache_reply,
537 struct rpc_task *task)
538{
539 int ret = 0;
540
541 dprintk("--> %s clp %p session %p sr_slotid %d\n",
542 __func__, clp, clp->cl_session, res->sr_slotid);
543
544 if (!nfs4_has_session(clp))
545 goto out;
546 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
547 task);
2628eddf 548 if (ret && ret != -EAGAIN) {
ce5039c1
AA		 549 /* terminate rpc task */
550 task->tk_status = ret;
551 task->tk_action = NULL;
552 }
553out:
554 dprintk("<-- %s status=%d\n", __func__, ret);
555 return ret;
556}
557
558struct nfs41_call_sync_data {
559 struct nfs_client *clp;
560 struct nfs4_sequence_args *seq_args;
561 struct nfs4_sequence_res *seq_res;
562 int cache_reply;
563};
564
565static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
566{
567 struct nfs41_call_sync_data *data = calldata;
568
569 dprintk("--> %s data->clp->cl_session %p\n", __func__,
570 data->clp->cl_session);
571 if (nfs4_setup_sequence(data->clp, data->seq_args,
572 data->seq_res, data->cache_reply, task))
573 return;
574 rpc_call_start(task);
575}
576
b257957e
AB		 577static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
578{
579 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
580 nfs41_call_sync_prepare(task, calldata);
581}
582
69ab40c4
AA		 583static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
584{
585 struct nfs41_call_sync_data *data = calldata;
586
587 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
69ab40c4
AA		 588}
589
ce5039c1
AA		 590struct rpc_call_ops nfs41_call_sync_ops = {
591 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 592 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 593};
594
b257957e
AB		 595struct rpc_call_ops nfs41_call_priv_sync_ops = {
596 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
597 .rpc_call_done = nfs41_call_sync_done,
598};
599
ce5039c1
AA		 600static int nfs4_call_sync_sequence(struct nfs_client *clp,
601 struct rpc_clnt *clnt,
602 struct rpc_message *msg,
603 struct nfs4_sequence_args *args,
604 struct nfs4_sequence_res *res,
b257957e
AB		 605 int cache_reply,
606 int privileged)
ce5039c1
AA		 607{
608 int ret;
609 struct rpc_task *task;
610 struct nfs41_call_sync_data data = {
611 .clp = clp,
612 .seq_args = args,
613 .seq_res = res,
614 .cache_reply = cache_reply,
615 };
616 struct rpc_task_setup task_setup = {
617 .rpc_client = clnt,
618 .rpc_message = msg,
619 .callback_ops = &nfs41_call_sync_ops,
620 .callback_data = &data
621 };
622
623 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 624 if (privileged)
625 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 626 task = rpc_run_task(&task_setup);
627 if (IS_ERR(task))
628 ret = PTR_ERR(task);
629 else {
630 ret = task->tk_status;
631 rpc_put_task(task);
632 }
633 return ret;
634}
635
cccef3b9
AA		 636int _nfs4_call_sync_session(struct nfs_server *server,
637 struct rpc_message *msg,
638 struct nfs4_sequence_args *args,
639 struct nfs4_sequence_res *res,
640 int cache_reply)
641{
ce5039c1 642 return nfs4_call_sync_sequence(server->nfs_client, server->client,
b257957e 643 msg, args, res, cache_reply, 0);
cccef3b9
AA		 644}
645
646#endif /* CONFIG_NFS_V4_1 */
647
648int _nfs4_call_sync(struct nfs_server *server,
649 struct rpc_message *msg,
650 struct nfs4_sequence_args *args,
651 struct nfs4_sequence_res *res,
652 int cache_reply)
653{
f3752975 654 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 655 return rpc_call_sync(server->client, msg, 0);
656}
657
658#define nfs4_call_sync(server, msg, args, res, cache_reply) \
659 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
660 &(res)->seq_res, (cache_reply))
661
b0df806c
AA		 662static void nfs4_sequence_done(const struct nfs_server *server,
663 struct nfs4_sequence_res *res, int rpc_status)
664{
665#ifdef CONFIG_NFS_V4_1
666 if (nfs4_has_session(server->nfs_client))
667 nfs41_sequence_done(server->nfs_client, res, rpc_status);
668#endif /* CONFIG_NFS_V4_1 */
669}
670
38478b24 671static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 672{
38478b24 673 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 674
38478b24 675 spin_lock(&dir->i_lock);
40d24704
TM		 676 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
677 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 678 nfs_force_lookup_revalidate(dir);
40d24704 679 nfsi->change_attr = cinfo->after;
38478b24 680 spin_unlock(&dir->i_lock);
1da177e4
LT		 681}
682
e56e0b78 683struct nfs4_opendata {
c6d00e63 684 struct kref kref;
e56e0b78
TM		 685 struct nfs_openargs o_arg;
686 struct nfs_openres o_res;
cdd4e68b
TM		 687 struct nfs_open_confirmargs c_arg;
688 struct nfs_open_confirmres c_res;
e56e0b78
TM		 689 struct nfs_fattr f_attr;
690 struct nfs_fattr dir_attr;
ad389da7 691 struct path path;
e56e0b78
TM		 692 struct dentry *dir;
693 struct nfs4_state_owner *owner;
aac00a8d 694 struct nfs4_state *state;
e56e0b78 695 struct iattr attrs;
26e976a8 696 unsigned long timestamp;
3e309914 697 unsigned int rpc_done : 1;
24ac23ab
TM		 698 int rpc_status;
699 int cancelled;
e56e0b78
TM		 700};
701
2ced46c2
TM		 702
703static void nfs4_init_opendata_res(struct nfs4_opendata *p)
704{
705 p->o_res.f_attr = &p->f_attr;
706 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 707 p->o_res.seqid = p->o_arg.seqid;
708 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 709 p->o_res.server = p->o_arg.server;
710 nfs_fattr_init(&p->f_attr);
711 nfs_fattr_init(&p->dir_attr);
578e4585 712 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 713}
714
ad389da7 715static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 716 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 717 const struct iattr *attrs)
718{
ad389da7 719 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 720 struct inode *dir = parent->d_inode;
721 struct nfs_server *server = NFS_SERVER(dir);
722 struct nfs4_opendata *p;
723
724 p = kzalloc(sizeof(*p), GFP_KERNEL);
725 if (p == NULL)
726 goto err;
727 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
728 if (p->o_arg.seqid == NULL)
729 goto err_free;
f6948697
AV		 730 path_get(path);
731 p->path = *path;
e56e0b78
TM		 732 p->dir = parent;
733 p->owner = sp;
734 atomic_inc(&sp->so_count);
735 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 736 p->o_arg.open_flags = flags;
737 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 738 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 739 p->o_arg.id = sp->so_owner_id.id;
ad389da7 740 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 741 p->o_arg.server = server;
742 p->o_arg.bitmask = server->attr_bitmask;
743 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78 744 if (flags & O_EXCL) {
4882ef72
AB		 745 if (nfs4_has_persistent_session(server->nfs_client)) {
746 /* GUARDED */
747 p->o_arg.u.attrs = &p->attrs;
748 memcpy(&p->attrs, attrs, sizeof(p->attrs));
749 } else { /* EXCLUSIVE4_1 */
750 u32 *s = (u32 *) p->o_arg.u.verifier.data;
751 s[0] = jiffies;
752 s[1] = current->pid;
753 }
e56e0b78
TM		 754 } else if (flags & O_CREAT) {
755 p->o_arg.u.attrs = &p->attrs;
756 memcpy(&p->attrs, attrs, sizeof(p->attrs));
757 }
cdd4e68b
TM		 758 p->c_arg.fh = &p->o_res.fh;
759 p->c_arg.stateid = &p->o_res.stateid;
760 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 761 nfs4_init_opendata_res(p);
c6d00e63 762 kref_init(&p->kref);
e56e0b78
TM		 763 return p;
764err_free:
765 kfree(p);
766err:
767 dput(parent);
768 return NULL;
769}
770
c6d00e63 771static void nfs4_opendata_free(struct kref *kref)
e56e0b78 772{
c6d00e63
TM		 773 struct nfs4_opendata *p = container_of(kref,
774 struct nfs4_opendata, kref);
775
776 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 777 if (p->state != NULL)
778 nfs4_put_open_state(p->state);
c6d00e63
TM		 779 nfs4_put_state_owner(p->owner);
780 dput(p->dir);
31f31db1 781 path_put(&p->path);
c6d00e63
TM		 782 kfree(p);
783}
784
785static void nfs4_opendata_put(struct nfs4_opendata *p)
786{
787 if (p != NULL)
788 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 789}
790
06f814a3
TM		 791static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
792{
06f814a3
TM		 793 int ret;
794
06f814a3 795 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 796 return ret;
797}
798
dc0b027d 799static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 800{
801 int ret = 0;
dc0b027d
TM		 802
803 if (open_mode & O_EXCL)
804 goto out;
805 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 806 case FMODE_READ:
88069f77
TM		 807 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
808 && state->n_rdonly != 0;
6ee41268
TM		 809 break;
810 case FMODE_WRITE:
88069f77
TM		 811 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
812 && state->n_wronly != 0;
6ee41268
TM		 813 break;
814 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 815 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
816 && state->n_rdwr != 0;
6ee41268 817 }
dc0b027d 818out:
6ee41268
TM		 819 return ret;
820}
821
dc0b027d 822static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 823{
dc0b027d 824 if ((delegation->type & fmode) != fmode)
aac00a8d 825 return 0;
15c831bf 826 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 827 return 0;
b7391f44 828 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 829 return 1;
830}
831
dc0b027d 832static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 833{
dc0b027d 834 switch (fmode) {
e7616923
TM		 835 case FMODE_WRITE:
836 state->n_wronly++;
837 break;
838 case FMODE_READ:
839 state->n_rdonly++;
840 break;
841 case FMODE_READ|FMODE_WRITE:
842 state->n_rdwr++;
843 }
dc0b027d 844 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 845}
846
dc0b027d 847static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 848{
849 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
850 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
851 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 852 switch (fmode) {
003707c7
TM		 853 case FMODE_READ:
854 set_bit(NFS_O_RDONLY_STATE, &state->flags);
855 break;
856 case FMODE_WRITE:
857 set_bit(NFS_O_WRONLY_STATE, &state->flags);
858 break;
859 case FMODE_READ|FMODE_WRITE:
860 set_bit(NFS_O_RDWR_STATE, &state->flags);
861 }
e7616923
TM		 862}
863
dc0b027d 864static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 865{
8bda4e4c 866 write_seqlock(&state->seqlock);
dc0b027d 867 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 868 write_sequnlock(&state->seqlock);
003707c7
TM		 869}
870
dc0b027d 871static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 872{
8bda4e4c
TM		 873 /*
874 * Protect the call to nfs4_state_set_mode_locked and
875 * serialise the stateid update
876 */
877 write_seqlock(&state->seqlock);
003707c7
TM		 878 if (deleg_stateid != NULL) {
879 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
880 set_bit(NFS_DELEGATED_STATE, &state->flags);
881 }
882 if (open_stateid != NULL)
dc0b027d 883 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 884 write_sequnlock(&state->seqlock);
885 spin_lock(&state->owner->so_lock);
dc0b027d 886 update_open_stateflags(state, fmode);
ec073428 887 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 888}
889
dc0b027d 890static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 891{
892 struct nfs_inode *nfsi = NFS_I(state->inode);
893 struct nfs_delegation *deleg_cur;
894 int ret = 0;
895
dc0b027d 896 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 897
898 rcu_read_lock();
899 deleg_cur = rcu_dereference(nfsi->delegation);
900 if (deleg_cur == NULL)
901 goto no_delegation;
902
903 spin_lock(&deleg_cur->lock);
904 if (nfsi->delegation != deleg_cur ||
dc0b027d 905 (deleg_cur->type & fmode) != fmode)
34310430
TM		 906 goto no_delegation_unlock;
907
908 if (delegation == NULL)
909 delegation = &deleg_cur->stateid;
910 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
911 goto no_delegation_unlock;
912
b7391f44 913 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 914 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 915 ret = 1;
916no_delegation_unlock:
917 spin_unlock(&deleg_cur->lock);
918no_delegation:
919 rcu_read_unlock();
920
921 if (!ret && open_stateid != NULL) {
dc0b027d 922 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 923 ret = 1;
924 }
925
926 return ret;
927}
928
929
dc0b027d 930static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 931{
932 struct nfs_delegation *delegation;
933
934 rcu_read_lock();
935 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 936 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 937 rcu_read_unlock();
938 return;
939 }
940 rcu_read_unlock();
941 nfs_inode_return_delegation(inode);
942}
943
6ee41268 944static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 945{
946 struct nfs4_state *state = opendata->state;
947 struct nfs_inode *nfsi = NFS_I(state->inode);
948 struct nfs_delegation *delegation;
dc0b027d
TM		 949 int open_mode = opendata->o_arg.open_flags & O_EXCL;
950 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 951 nfs4_stateid stateid;
952 int ret = -EAGAIN;
953
aac00a8d 954 for (;;) {
dc0b027d 955 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 956 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 957 if (can_open_cached(state, fmode, open_mode)) {
958 update_open_stateflags(state, fmode);
6ee41268 959 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 960 goto out_return_state;
961 }
962 spin_unlock(&state->owner->so_lock);
963 }
34310430
TM		 964 rcu_read_lock();
965 delegation = rcu_dereference(nfsi->delegation);
966 if (delegation == NULL ||
dc0b027d 967 !can_open_delegated(delegation, fmode)) {
34310430 968 rcu_read_unlock();
aac00a8d 969 break;
34310430 970 }
aac00a8d
TM		 971 /* Save the delegation */
972 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
973 rcu_read_unlock();
af22f94a 974 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 975 if (ret != 0)
976 goto out;
977 ret = -EAGAIN;
34310430
TM		 978
979 /* Try to update the stateid using the delegation */
dc0b027d 980 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 981 goto out_return_state;
aac00a8d 982 }
aac00a8d
TM		 983out:
984 return ERR_PTR(ret);
985out_return_state:
986 atomic_inc(&state->count);
987 return state;
988}
989
24ac23ab
TM		 990static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
991{
992 struct inode *inode;
993 struct nfs4_state *state = NULL;
003707c7 994 struct nfs_delegation *delegation;
1b370bc2 995 int ret;
24ac23ab 996
aac00a8d 997 if (!data->rpc_done) {
6ee41268 998 state = nfs4_try_open_cached(data);
aac00a8d
TM		 999 goto out;
1000 }
1001
1b370bc2 1002 ret = -EAGAIN;
24ac23ab 1003 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1004 goto err;
24ac23ab 1005 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1006 ret = PTR_ERR(inode);
03f28e3a 1007 if (IS_ERR(inode))
1b370bc2
TM		 1008 goto err;
1009 ret = -ENOMEM;
24ac23ab
TM		 1010 state = nfs4_get_open_state(inode, data->owner);
1011 if (state == NULL)
1b370bc2 1012 goto err_put_inode;
549d6ed5 1013 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1014 int delegation_flags = 0;
1015
003707c7
TM		 1016 rcu_read_lock();
1017 delegation = rcu_dereference(NFS_I(inode)->delegation);
1018 if (delegation)
1019 delegation_flags = delegation->flags;
1020 rcu_read_unlock();
15c831bf 1021 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1022 nfs_inode_set_delegation(state->inode,
1023 data->owner->so_cred,
1024 &data->o_res);
1025 else
1026 nfs_inode_reclaim_delegation(state->inode,
1027 data->owner->so_cred,
1028 &data->o_res);
1029 }
34310430
TM		 1030
1031 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1032 data->o_arg.fmode);
24ac23ab 1033 iput(inode);
aac00a8d 1034out:
24ac23ab 1035 return state;
1b370bc2
TM		 1036err_put_inode:
1037 iput(inode);
1038err:
1039 return ERR_PTR(ret);
24ac23ab
TM		 1040}
1041
864472e9
TM		 1042static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1043{
1044 struct nfs_inode *nfsi = NFS_I(state->inode);
1045 struct nfs_open_context *ctx;
1046
1047 spin_lock(&state->inode->i_lock);
1048 list_for_each_entry(ctx, &nfsi->open_files, list) {
1049 if (ctx->state != state)
1050 continue;
1051 get_nfs_open_context(ctx);
1052 spin_unlock(&state->inode->i_lock);
1053 return ctx;
1054 }
1055 spin_unlock(&state->inode->i_lock);
1056 return ERR_PTR(-ENOENT);
1057}
1058
6f220ed5
TM		 1059static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1060{
1061 struct nfs4_opendata *opendata;
1062
dc0b027d 1063 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1064 if (opendata == NULL)
1065 return ERR_PTR(-ENOMEM);
1066 opendata->state = state;
1067 atomic_inc(&state->count);
1068 return opendata;
1069}
1070
dc0b027d 1071static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1072{
2ced46c2 1073 struct nfs4_state *newstate;
864472e9
TM		 1074 int ret;
1075
dc0b027d
TM		 1076 opendata->o_arg.open_flags = 0;
1077 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1078 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1079 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1080 nfs4_init_opendata_res(opendata);
b257957e 1081 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1082 if (ret != 0)
1083 return ret;
2ced46c2 1084 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1085 if (IS_ERR(newstate))
1086 return PTR_ERR(newstate);
dc0b027d 1087 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1088 *res = newstate;
864472e9
TM		 1089 return 0;
1090}
1091
1092static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1093{
864472e9 1094 struct nfs4_state *newstate;
864472e9
TM		 1095 int ret;
1096
1097 /* memory barrier prior to reading state->n_* */
2ced46c2 1098 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1099 smp_rmb();
1100 if (state->n_rdwr != 0) {
2ced46c2 1101 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1102 if (ret != 0)
1103 return ret;
2ced46c2
TM		 1104 if (newstate != state)
1105 return -ESTALE;
864472e9
TM		 1106 }
1107 if (state->n_wronly != 0) {
2ced46c2 1108 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1109 if (ret != 0)
1110 return ret;
2ced46c2
TM		 1111 if (newstate != state)
1112 return -ESTALE;
864472e9
TM		 1113 }
1114 if (state->n_rdonly != 0) {
2ced46c2 1115 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1116 if (ret != 0)
1117 return ret;
2ced46c2
TM		 1118 if (newstate != state)
1119 return -ESTALE;
864472e9 1120 }
1ac7e2fd
TM		 1121 /*
1122 * We may have performed cached opens for all three recoveries.
1123 * Check if we need to update the current stateid.
1124 */
1125 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1126 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1127 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1128 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1129 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1130 write_sequnlock(&state->seqlock);
1ac7e2fd 1131 }
864472e9
TM		 1132 return 0;
1133}
1134
1da177e4
LT		 1135/*
1136 * OPEN_RECLAIM:
1137 * reclaim state on the server after a reboot.
1da177e4 1138 */
539cd03a 1139static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1140{
1ac7e2fd 1141 struct nfs_delegation *delegation;
864472e9 1142 struct nfs4_opendata *opendata;
dc0b027d 1143 fmode_t delegation_type = 0;
1da177e4
LT		 1144 int status;
1145
6f220ed5
TM		 1146 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1147 if (IS_ERR(opendata))
1148 return PTR_ERR(opendata);
864472e9
TM		 1149 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1150 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1151 rcu_read_lock();
1152 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1153 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1154 delegation_type = delegation->type;
1ac7e2fd 1155 rcu_read_unlock();
864472e9
TM		 1156 opendata->o_arg.u.delegation_type = delegation_type;
1157 status = nfs4_open_recover(opendata, state);
c6d00e63 1158 nfs4_opendata_put(opendata);
1da177e4
LT		 1159 return status;
1160}
1161
539cd03a 1162static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1163{
1164 struct nfs_server *server = NFS_SERVER(state->inode);
1165 struct nfs4_exception exception = { };
1166 int err;
1167 do {
539cd03a 1168 err = _nfs4_do_open_reclaim(ctx, state);
2c643488 1169 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 1170 break;
1171 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1172 } while (exception.retry);
1173 return err;
1174}
1175
864472e9
TM		 1176static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1177{
1178 struct nfs_open_context *ctx;
1179 int ret;
1180
1181 ctx = nfs4_state_find_open_context(state);
1182 if (IS_ERR(ctx))
1183 return PTR_ERR(ctx);
539cd03a 1184 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1185 put_nfs_open_context(ctx);
1186 return ret;
1187}
1188
13437e12 1189static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1190{
e56e0b78 1191 struct nfs4_opendata *opendata;
864472e9 1192 int ret;
1da177e4 1193
6f220ed5
TM		 1194 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1195 if (IS_ERR(opendata))
1196 return PTR_ERR(opendata);
e56e0b78 1197 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1198 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1199 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1200 ret = nfs4_open_recover(opendata, state);
c6d00e63 1201 nfs4_opendata_put(opendata);
864472e9 1202 return ret;
1da177e4
LT		 1203}
1204
13437e12 1205int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1206{
1207 struct nfs4_exception exception = { };
539cd03a 1208 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1209 int err;
1210 do {
13437e12 1211 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1212 switch (err) {
1213 case 0:
965b5d67
TM		 1214 case -ENOENT:
1215 case -ESTALE:
1216 goto out;
bcfa49f6
RL		 1217 case -NFS4ERR_BADSESSION:
1218 case -NFS4ERR_BADSLOT:
1219 case -NFS4ERR_BAD_HIGH_SLOT:
1220 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1221 case -NFS4ERR_DEADSESSION:
1222 nfs4_schedule_state_recovery(
1223 server->nfs_client);
1224 goto out;
1da177e4
LT		 1225 case -NFS4ERR_STALE_CLIENTID:
1226 case -NFS4ERR_STALE_STATEID:
1227 case -NFS4ERR_EXPIRED:
1228 /* Don't recall a delegation if it was lost */
7539bbab 1229 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1230 goto out;
1231 case -ERESTARTSYS:
1232 /*
1233 * The show must go on: exit, but mark the
1234 * stateid as needing recovery.
1235 */
1236 case -NFS4ERR_ADMIN_REVOKED:
1237 case -NFS4ERR_BAD_STATEID:
1238 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1239 case -ENOMEM:
1240 err = 0;
1241 goto out;
1da177e4
LT		 1242 }
1243 err = nfs4_handle_exception(server, err, &exception);
1244 } while (exception.retry);
965b5d67 1245out:
1da177e4
LT		 1246 return err;
1247}
1248
cdd4e68b
TM		 1249static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1250{
1251 struct nfs4_opendata *data = calldata;
1252
1253 data->rpc_status = task->tk_status;
1254 if (RPC_ASSASSINATED(task))
1255 return;
26e976a8 1256 if (data->rpc_status == 0) {
cdd4e68b
TM		 1257 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1258 sizeof(data->o_res.stateid.data));
bb22629e 1259 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1260 renew_lease(data->o_res.server, data->timestamp);
3e309914 1261 data->rpc_done = 1;
26e976a8 1262 }
cdd4e68b
TM		 1263}
1264
1265static void nfs4_open_confirm_release(void *calldata)
1266{
1267 struct nfs4_opendata *data = calldata;
1268 struct nfs4_state *state = NULL;
1269
1270 /* If this request hasn't been cancelled, do nothing */
1271 if (data->cancelled == 0)
1272 goto out_free;
1273 /* In case of error, no cleanup! */
3e309914 1274 if (!data->rpc_done)
cdd4e68b 1275 goto out_free;
cdd4e68b 1276 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1277 if (!IS_ERR(state))
dc0b027d 1278 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1279out_free:
c6d00e63 1280 nfs4_opendata_put(data);
cdd4e68b
TM		 1281}
1282
1283static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1284 .rpc_call_done = nfs4_open_confirm_done,
1285 .rpc_release = nfs4_open_confirm_release,
1286};
1287
1288/*
1289 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1290 */
1291static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1292{
1293 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1294 struct rpc_task *task;
5138fde0
TM		 1295 struct rpc_message msg = {
1296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1297 .rpc_argp = &data->c_arg,
1298 .rpc_resp = &data->c_res,
1299 .rpc_cred = data->owner->so_cred,
1300 };
c970aa85
TM		 1301 struct rpc_task_setup task_setup_data = {
1302 .rpc_client = server->client,
5138fde0 1303 .rpc_message = &msg,
c970aa85
TM		 1304 .callback_ops = &nfs4_open_confirm_ops,
1305 .callback_data = data,
101070ca 1306 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1307 .flags = RPC_TASK_ASYNC,
1308 };
1da177e4
LT		 1309 int status;
1310
c6d00e63 1311 kref_get(&data->kref);
3e309914
TM		 1312 data->rpc_done = 0;
1313 data->rpc_status = 0;
5138fde0 1314 data->timestamp = jiffies;
c970aa85 1315 task = rpc_run_task(&task_setup_data);
7a1218a2 1316 if (IS_ERR(task))
cdd4e68b 1317 return PTR_ERR(task);
cdd4e68b
TM		 1318 status = nfs4_wait_for_completion_rpc_task(task);
1319 if (status != 0) {
1320 data->cancelled = 1;
1321 smp_wmb();
1322 } else
1323 status = data->rpc_status;
e6b3c4db 1324 rpc_put_task(task);
1da177e4
LT		 1325 return status;
1326}
1327
24ac23ab 1328static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1329{
24ac23ab
TM		 1330 struct nfs4_opendata *data = calldata;
1331 struct nfs4_state_owner *sp = data->owner;
5138fde0 1332
24ac23ab
TM		 1333 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1334 return;
aac00a8d
TM		 1335 /*
1336 * Check if we still need to send an OPEN call, or if we can use
1337 * a delegation instead.
1338 */
1339 if (data->state != NULL) {
1340 struct nfs_delegation *delegation;
1341
dc0b027d 1342 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1343 goto out_no_action;
aac00a8d
TM		 1344 rcu_read_lock();
1345 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1346 if (delegation != NULL &&
15c831bf 1347 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1348 rcu_read_unlock();
6ee41268 1349 goto out_no_action;
aac00a8d
TM		 1350 }
1351 rcu_read_unlock();
1352 }
24ac23ab 1353 /* Update sequence id. */
9f958ab8 1354 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1355 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1356 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1357 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1358 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1359 }
26e976a8 1360 data->timestamp = jiffies;
d898528c
AA		 1361 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1362 &data->o_arg.seq_args,
1363 &data->o_res.seq_res, 1, task))
1364 return;
5138fde0 1365 rpc_call_start(task);
6ee41268
TM		 1366 return;
1367out_no_action:
1368 task->tk_action = NULL;
1369
24ac23ab 1370}
1da177e4 1371
b257957e
AB		 1372static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1373{
1374 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1375 nfs4_open_prepare(task, calldata);
1376}
1377
24ac23ab
TM		 1378static void nfs4_open_done(struct rpc_task *task, void *calldata)
1379{
1380 struct nfs4_opendata *data = calldata;
1da177e4 1381
24ac23ab 1382 data->rpc_status = task->tk_status;
d898528c 1383
d61e612a
TM		 1384 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1385 task->tk_status);
d898528c 1386
24ac23ab
TM		 1387 if (RPC_ASSASSINATED(task))
1388 return;
1389 if (task->tk_status == 0) {
1390 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1391 case S_IFREG:
1392 break;
1393 case S_IFLNK:
24ac23ab 1394 data->rpc_status = -ELOOP;
6f926b5b
TM		 1395 break;
1396 case S_IFDIR:
24ac23ab 1397 data->rpc_status = -EISDIR;
6f926b5b
TM		 1398 break;
1399 default:
24ac23ab 1400 data->rpc_status = -ENOTDIR;
6f926b5b 1401 }
26e976a8 1402 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1403 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1404 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1405 }
3e309914 1406 data->rpc_done = 1;
24ac23ab 1407}
6f926b5b 1408
24ac23ab
TM		 1409static void nfs4_open_release(void *calldata)
1410{
1411 struct nfs4_opendata *data = calldata;
1412 struct nfs4_state *state = NULL;
1413
1414 /* If this request hasn't been cancelled, do nothing */
1415 if (data->cancelled == 0)
1416 goto out_free;
1417 /* In case of error, no cleanup! */
3e309914 1418 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1419 goto out_free;
1420 /* In case we need an open_confirm, no cleanup! */
1421 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1422 goto out_free;
24ac23ab 1423 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1424 if (!IS_ERR(state))
dc0b027d 1425 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1426out_free:
c6d00e63 1427 nfs4_opendata_put(data);
24ac23ab
TM		 1428}
1429
1430static const struct rpc_call_ops nfs4_open_ops = {
1431 .rpc_call_prepare = nfs4_open_prepare,
1432 .rpc_call_done = nfs4_open_done,
1433 .rpc_release = nfs4_open_release,
1434};
1435
b257957e
AB		 1436static const struct rpc_call_ops nfs4_recover_open_ops = {
1437 .rpc_call_prepare = nfs4_recover_open_prepare,
1438 .rpc_call_done = nfs4_open_done,
1439 .rpc_release = nfs4_open_release,
1440};
1441
1442static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1443{
1444 struct inode *dir = data->dir->d_inode;
1445 struct nfs_server *server = NFS_SERVER(dir);
1446 struct nfs_openargs *o_arg = &data->o_arg;
1447 struct nfs_openres *o_res = &data->o_res;
1448 struct rpc_task *task;
5138fde0
TM		 1449 struct rpc_message msg = {
1450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1451 .rpc_argp = o_arg,
1452 .rpc_resp = o_res,
1453 .rpc_cred = data->owner->so_cred,
1454 };
c970aa85
TM		 1455 struct rpc_task_setup task_setup_data = {
1456 .rpc_client = server->client,
5138fde0 1457 .rpc_message = &msg,
c970aa85
TM		 1458 .callback_ops = &nfs4_open_ops,
1459 .callback_data = data,
101070ca 1460 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1461 .flags = RPC_TASK_ASYNC,
1462 };
24ac23ab
TM		 1463 int status;
1464
c6d00e63 1465 kref_get(&data->kref);
3e309914
TM		 1466 data->rpc_done = 0;
1467 data->rpc_status = 0;
2ced46c2 1468 data->cancelled = 0;
b257957e
AB		 1469 if (isrecover)
1470 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1471 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1472 if (IS_ERR(task))
1473 return PTR_ERR(task);
1474 status = nfs4_wait_for_completion_rpc_task(task);
1475 if (status != 0) {
1476 data->cancelled = 1;
1477 smp_wmb();
1478 } else
1479 status = data->rpc_status;
1480 rpc_put_task(task);
1481
1482 return status;
1483}
1484
1485static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1486{
1487 struct inode *dir = data->dir->d_inode;
1488 struct nfs_openres *o_res = &data->o_res;
1489 int status;
1490
1491 status = nfs4_run_open_task(data, 1);
1492 if (status != 0 || !data->rpc_done)
1493 return status;
1494
1495 nfs_refresh_inode(dir, o_res->dir_attr);
1496
1497 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1498 status = _nfs4_proc_open_confirm(data);
1499 if (status != 0)
1500 return status;
1501 }
1502
1503 return status;
1504}
1505
1506/*
1507 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1508 */
1509static int _nfs4_proc_open(struct nfs4_opendata *data)
1510{
1511 struct inode *dir = data->dir->d_inode;
1512 struct nfs_server *server = NFS_SERVER(dir);
1513 struct nfs_openargs *o_arg = &data->o_arg;
1514 struct nfs_openres *o_res = &data->o_res;
1515 int status;
1516
1517 status = nfs4_run_open_task(data, 0);
3e309914 1518 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1519 return status;
1520
56ae19f3
TM		 1521 if (o_arg->open_flags & O_CREAT) {
1522 update_changeattr(dir, &o_res->cinfo);
1523 nfs_post_op_update_inode(dir, o_res->dir_attr);
1524 } else
1525 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1526 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1527 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1528 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1529 status = _nfs4_proc_open_confirm(data);
1da177e4 1530 if (status != 0)
24ac23ab 1531 return status;
1da177e4
LT		 1532 }
1533 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1534 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1535 return 0;
1da177e4
LT		 1536}
1537
10afec90 1538static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1539{
7539bbab 1540 struct nfs_client *clp = server->nfs_client;
a78cb57a 1541 unsigned int loop;
6b30954e 1542 int ret;
58d9714a 1543
a78cb57a 1544 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1545 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1546 if (ret != 0)
a78cb57a 1547 break;
e598d843
TM		 1548 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1549 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1550 break;
58d9714a 1551 nfs4_schedule_state_recovery(clp);
a78cb57a 1552 ret = -EIO;
6b30954e 1553 }
a78cb57a 1554 return ret;
58d9714a
TM		 1555}
1556
1da177e4
LT		 1557/*
1558 * OPEN_EXPIRED:
1559 * reclaim state on the server after a network partition.
1560 * Assumes caller holds the appropriate lock
1561 */
539cd03a 1562static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1563{
e56e0b78 1564 struct nfs4_opendata *opendata;
864472e9 1565 int ret;
1da177e4 1566
6f220ed5
TM		 1567 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1568 if (IS_ERR(opendata))
1569 return PTR_ERR(opendata);
864472e9 1570 ret = nfs4_open_recover(opendata, state);
35d05778 1571 if (ret == -ESTALE)
539cd03a 1572 d_drop(ctx->path.dentry);
c6d00e63 1573 nfs4_opendata_put(opendata);
864472e9 1574 return ret;
1da177e4
LT		 1575}
1576
a9ed2e25 1577static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1578{
539cd03a 1579 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1580 struct nfs4_exception exception = { };
1581 int err;
1582
1583 do {
539cd03a 1584 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1585 switch (err) {
1586 default:
1587 goto out;
1588 case -NFS4ERR_GRACE:
1589 case -NFS4ERR_DELAY:
2c643488 1590 case -EKEYEXPIRED:
a9ed2e25
TM		 1591 nfs4_handle_exception(server, err, &exception);
1592 err = 0;
1593 }
202b50dc 1594 } while (exception.retry);
a9ed2e25 1595out:
202b50dc
TM		 1596 return err;
1597}
1598
1da177e4
LT		 1599static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1600{
1da177e4 1601 struct nfs_open_context *ctx;
864472e9 1602 int ret;
1da177e4 1603
864472e9
TM		 1604 ctx = nfs4_state_find_open_context(state);
1605 if (IS_ERR(ctx))
1606 return PTR_ERR(ctx);
539cd03a 1607 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1608 put_nfs_open_context(ctx);
1609 return ret;
1da177e4
LT		 1610}
1611
aa53ed54
JL		 1612/*
1613 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1614 * fields corresponding to attributes that were used to store the verifier.
1615 * Make sure we clobber those fields in the later setattr call
1616 */
1617static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1618{
1619 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1620 !(sattr->ia_valid & ATTR_ATIME_SET))
1621 sattr->ia_valid |= ATTR_ATIME;
1622
1623 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1624 !(sattr->ia_valid & ATTR_MTIME_SET))
1625 sattr->ia_valid |= ATTR_MTIME;
1626}
1627
1da177e4 1628/*
24ac23ab 1629 * Returns a referenced nfs4_state
1da177e4 1630 */
dc0b027d 1631static 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		 1632{
1633 struct nfs4_state_owner *sp;
1634 struct nfs4_state *state = NULL;
1635 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1636 struct nfs4_opendata *opendata;
aac00a8d 1637 int status;
1da177e4
LT		 1638
1639 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1640 status = -ENOMEM;
1641 if (!(sp = nfs4_get_state_owner(server, cred))) {
1642 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1643 goto out_err;
1644 }
58d9714a
TM		 1645 status = nfs4_recover_expired_lease(server);
1646 if (status != 0)
b4454fe1 1647 goto err_put_state_owner;
aac00a8d 1648 if (path->dentry->d_inode != NULL)
dc0b027d 1649 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1650 status = -ENOMEM;
dc0b027d 1651 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1652 if (opendata == NULL)
95d35cb4 1653 goto err_put_state_owner;
1da177e4 1654
aac00a8d
TM		 1655 if (path->dentry->d_inode != NULL)
1656 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1657
24ac23ab 1658 status = _nfs4_proc_open(opendata);
1da177e4 1659 if (status != 0)
c6d00e63 1660 goto err_opendata_put;
1da177e4 1661
aa53ed54
JL		 1662 if (opendata->o_arg.open_flags & O_EXCL)
1663 nfs4_exclusive_attrset(opendata, sattr);
1664
24ac23ab 1665 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1666 status = PTR_ERR(state);
1667 if (IS_ERR(state))
c6d00e63 1668 goto err_opendata_put;
0df5dd4a 1669 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1670 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
c6d00e63 1671 nfs4_opendata_put(opendata);
1da177e4 1672 nfs4_put_state_owner(sp);
1da177e4
LT		 1673 *res = state;
1674 return 0;
c6d00e63
TM		 1675err_opendata_put:
1676 nfs4_opendata_put(opendata);
e56e0b78
TM		 1677err_put_state_owner:
1678 nfs4_put_state_owner(sp);
1da177e4 1679out_err:
1da177e4
LT		 1680 *res = NULL;
1681 return status;
1682}
1683
1684
dc0b027d 1685static 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		 1686{
1687 struct nfs4_exception exception = { };
1688 struct nfs4_state *res;
1689 int status;
1690
1691 do {
dc0b027d 1692 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1693 if (status == 0)
1694 break;
1695 /* NOTE: BAD_SEQID means the server and client disagree about the
1696 * book-keeping w.r.t. state-changing operations
1697 * (OPEN/CLOSE/LOCK/LOCKU...)
1698 * It is actually a sign of a bug on the client or on the server.
1699 *
1700 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1701 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1702 * have unhashed the old state_owner for us, and that we can
1703 * therefore safely retry using a new one. We should still warn
1704 * the user though...
1705 */
1706 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1707 printk(KERN_WARNING "NFS: v4 server %s "
1708 " returned a bad sequence-id error!\n",
1709 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1710 exception.retry = 1;
1711 continue;
1712 }
550f5747
TM		 1713 /*
1714 * BAD_STATEID on OPEN means that the server cancelled our
1715 * state before it received the OPEN_CONFIRM.
1716 * Recover by retrying the request as per the discussion
1717 * on Page 181 of RFC3530.
1718 */
1719 if (status == -NFS4ERR_BAD_STATEID) {
1720 exception.retry = 1;
1721 continue;
1722 }
aac00a8d
TM		 1723 if (status == -EAGAIN) {
1724 /* We must have found a delegation */
1725 exception.retry = 1;
1726 continue;
1727 }
1da177e4
LT		 1728 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1729 status, &exception));
1730 } while (exception.retry);
1731 return res;
1732}
1733
659bfcd6
TM		 1734static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1735 struct nfs_fattr *fattr, struct iattr *sattr,
1736 struct nfs4_state *state)
1da177e4 1737{
3e4f6290 1738 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1739 struct nfs_setattrargs arg = {
3e4f6290 1740 .fh = NFS_FH(inode),
1da177e4
LT		 1741 .iap = sattr,
1742 .server = server,
1743 .bitmask = server->attr_bitmask,
1744 };
1745 struct nfs_setattrres res = {
1746 .fattr = fattr,
1747 .server = server,
1748 };
1749 struct rpc_message msg = {
659bfcd6
TM		 1750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1751 .rpc_argp = &arg,
1752 .rpc_resp = &res,
1753 .rpc_cred = cred,
1da177e4 1754 };
26e976a8 1755 unsigned long timestamp = jiffies;
65e4308d 1756 int status;
1da177e4 1757
0e574af1 1758 nfs_fattr_init(fattr);
1da177e4 1759
3e4f6290
TM		 1760 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1761 /* Use that stateid */
1762 } else if (state != NULL) {
08e9eac4
TM		 1763 nfs4_copy_stateid(&arg.stateid, state, current->files);
1764 } else
1da177e4
LT		 1765 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1766
cccef3b9 1767 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1768 if (status == 0 && state != NULL)
1769 renew_lease(server, timestamp);
65e4308d 1770 return status;
1da177e4
LT		 1771}
1772
659bfcd6
TM		 1773static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1774 struct nfs_fattr *fattr, struct iattr *sattr,
1775 struct nfs4_state *state)
1da177e4 1776{
3e4f6290 1777 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1778 struct nfs4_exception exception = { };
1779 int err;
1780 do {
1781 err = nfs4_handle_exception(server,
659bfcd6 1782 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1783 &exception);
1784 } while (exception.retry);
1785 return err;
1786}
1787
1788struct nfs4_closedata {
4a35bd41 1789 struct path path;
1da177e4
LT		 1790 struct inode *inode;
1791 struct nfs4_state *state;
1792 struct nfs_closeargs arg;
1793 struct nfs_closeres res;
516a6af6 1794 struct nfs_fattr fattr;
26e976a8 1795 unsigned long timestamp;
1da177e4
LT		 1796};
1797
963d8fe5 1798static void nfs4_free_closedata(void *data)
9512135d 1799{
963d8fe5
TM		 1800 struct nfs4_closedata *calldata = data;
1801 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1802
1803 nfs4_put_open_state(calldata->state);
1804 nfs_free_seqid(calldata->arg.seqid);
9512135d 1805 nfs4_put_state_owner(sp);
31f31db1 1806 path_put(&calldata->path);
9512135d
TM		 1807 kfree(calldata);
1808}
1809
88069f77
TM		 1810static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1811 fmode_t fmode)
1812{
1813 spin_lock(&state->owner->so_lock);
1814 if (!(fmode & FMODE_READ))
1815 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1816 if (!(fmode & FMODE_WRITE))
1817 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1818 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1819 spin_unlock(&state->owner->so_lock);
1820}
1821
963d8fe5 1822static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1823{
963d8fe5 1824 struct nfs4_closedata *calldata = data;
1da177e4 1825 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1826 struct nfs_server *server = NFS_SERVER(calldata->inode);
1827
19ddab06 1828 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1829 if (RPC_ASSASSINATED(task))
1830 return;
1da177e4
LT		 1831 /* hmm. we are done with the inode, and in the process of freeing
1832 * the state_owner. we keep this around to process errors
1833 */
1da177e4
LT		 1834 switch (task->tk_status) {
1835 case 0:
45328c35 1836 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1837 renew_lease(server, calldata->timestamp);
88069f77
TM		 1838 nfs4_close_clear_stateid_flags(state,
1839 calldata->arg.fmode);
1da177e4
LT		 1840 break;
1841 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1842 case -NFS4ERR_OLD_STATEID:
1843 case -NFS4ERR_BAD_STATEID:
1da177e4 1844 case -NFS4ERR_EXPIRED:
dc0b027d 1845 if (calldata->arg.fmode == 0)
9e33bed5 1846 break;
1da177e4 1847 default:
72211dbe
TM		 1848 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1849 rpc_restart_call_prepare(task);
1da177e4 1850 }
72211dbe 1851 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1852 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1853}
1854
4ce70ada 1855static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1856{
4ce70ada 1857 struct nfs4_closedata *calldata = data;
9512135d 1858 struct nfs4_state *state = calldata->state;
88069f77 1859 int call_close = 0;
9512135d 1860
963d8fe5 1861 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1862 return;
003707c7 1863
88069f77
TM		 1864 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1865 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1866 spin_lock(&state->owner->so_lock);
003707c7 1867 /* Calculate the change in open mode */
e7616923 1868 if (state->n_rdwr == 0) {
003707c7 1869 if (state->n_rdonly == 0) {
88069f77
TM		 1870 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1871 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1872 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1873 }
1874 if (state->n_wronly == 0) {
88069f77
TM		 1875 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1876 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1877 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1878 }
e7616923 1879 }
4cecb76f 1880 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1881
1882 if (!call_close) {
963d8fe5
TM		 1883 /* Note: exit _without_ calling nfs4_close_done */
1884 task->tk_action = NULL;
9512135d
TM		 1885 return;
1886 }
88069f77
TM		 1887
1888 if (calldata->arg.fmode == 0)
1889 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1890
516a6af6 1891 nfs_fattr_init(calldata->res.fattr);
26e976a8 1892 calldata->timestamp = jiffies;
19ddab06
AA		 1893 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1894 &calldata->arg.seq_args, &calldata->res.seq_res,
1895 1, task))
1896 return;
5138fde0 1897 rpc_call_start(task);
1da177e4
LT		 1898}
1899
963d8fe5 1900static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1901 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1902 .rpc_call_done = nfs4_close_done,
1903 .rpc_release = nfs4_free_closedata,
1904};
1905
1da177e4
LT		 1906/*
1907 * It is possible for data to be read/written from a mem-mapped file
1908 * after the sys_close call (which hits the vfs layer as a flush).
1909 * This means that we can't safely call nfsv4 close on a file until
1910 * the inode is cleared. This in turn means that we are not good
1911 * NFSv4 citizens - we do not indicate to the server to update the file's
1912 * share state even when we are done with one of the three share
1913 * stateid's in the inode.
1914 *
1915 * NOTE: Caller must be holding the sp->so_owner semaphore!
1916 */
a49c3c77 1917int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1918{
4a35bd41 1919 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1920 struct nfs4_closedata *calldata;
b39e625b
TM		 1921 struct nfs4_state_owner *sp = state->owner;
1922 struct rpc_task *task;
5138fde0
TM		 1923 struct rpc_message msg = {
1924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1925 .rpc_cred = state->owner->so_cred,
1926 };
c970aa85
TM		 1927 struct rpc_task_setup task_setup_data = {
1928 .rpc_client = server->client,
5138fde0 1929 .rpc_message = &msg,
c970aa85 1930 .callback_ops = &nfs4_close_ops,
101070ca 1931 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1932 .flags = RPC_TASK_ASYNC,
1933 };
9512135d 1934 int status = -ENOMEM;
1da177e4 1935
19ddab06 1936 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1937 if (calldata == NULL)
9512135d 1938 goto out;
4a35bd41 1939 calldata->inode = state->inode;
1da177e4 1940 calldata->state = state;
4a35bd41 1941 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1942 calldata->arg.stateid = &state->open_stateid;
1da177e4 1943 /* Serialization for the sequence id */
cee54fc9 1944 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1945 if (calldata->arg.seqid == NULL)
1946 goto out_free_calldata;
dc0b027d 1947 calldata->arg.fmode = 0;
a65318bf 1948 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1949 calldata->res.fattr = &calldata->fattr;
c1d51931 1950 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1951 calldata->res.server = server;
5f7dbd5c 1952 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
f6948697
AV		 1953 path_get(path);
1954 calldata->path = *path;
9512135d 1955
5138fde0
TM		 1956 msg.rpc_argp = &calldata->arg,
1957 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1958 task_setup_data.callback_data = calldata;
1959 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1960 if (IS_ERR(task))
1961 return PTR_ERR(task);
a49c3c77
TM		 1962 status = 0;
1963 if (wait)
1964 status = rpc_wait_for_completion_task(task);
b39e625b 1965 rpc_put_task(task);
a49c3c77 1966 return status;
9512135d
TM		 1967out_free_calldata:
1968 kfree(calldata);
1969out:
b39e625b
TM		 1970 nfs4_put_open_state(state);
1971 nfs4_put_state_owner(sp);
9512135d 1972 return status;
1da177e4
LT		 1973}
1974
dc0b027d 1975static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1976{
1977 struct file *filp;
1b45c46c 1978 int ret;
02a913a7 1979
1b45c46c 1980 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1981 if (fmode & FMODE_EXEC) {
af22f94a 1982 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1983 state->owner->so_cred,
1984 nd->intent.open.flags);
1985 if (ret < 0)
1986 goto out_close;
1987 }
4a35bd41 1988 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1989 if (!IS_ERR(filp)) {
1990 struct nfs_open_context *ctx;
cd3758e3 1991 ctx = nfs_file_open_context(filp);
02a913a7 1992 ctx->state = state;
95cf959b
TM		 1993 return 0;
1994 }
1b45c46c
TM		 1995 ret = PTR_ERR(filp);
1996out_close:
dc0b027d 1997 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1998 return ret;
02a913a7
TM		 1999}
2000
2001struct dentry *
1da177e4
LT		 2002nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
2003{
ad389da7 2004 struct path path = {
4ac91378 2005 .mnt = nd->path.mnt,
ad389da7
TM		 2006 .dentry = dentry,
2007 };
4ac91378 2008 struct dentry *parent;
1da177e4
LT		 2009 struct iattr attr;
2010 struct rpc_cred *cred;
2011 struct nfs4_state *state;
02a913a7 2012 struct dentry *res;
dc0b027d 2013 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2014
2015 if (nd->flags & LOOKUP_CREATE) {
2016 attr.ia_mode = nd->intent.open.create_mode;
2017 attr.ia_valid = ATTR_MODE;
2018 if (!IS_POSIXACL(dir))
ce3b0f8d 2019 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2020 } else {
2021 attr.ia_valid = 0;
2022 BUG_ON(nd->intent.open.flags & O_CREAT);
2023 }
2024
98a8e323 2025 cred = rpc_lookup_cred();
1da177e4 2026 if (IS_ERR(cred))
02a913a7 2027 return (struct dentry *)cred;
565277f6
TM		 2028 parent = dentry->d_parent;
2029 /* Protect against concurrent sillydeletes */
2030 nfs_block_sillyrename(parent);
dc0b027d 2031 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2032 put_rpccred(cred);
02a913a7 2033 if (IS_ERR(state)) {
d75340cc 2034 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2035 d_add(dentry, NULL);
d75340cc
TM		 2036 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2037 }
565277f6 2038 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2039 return (struct dentry *)state;
2040 }
24ac23ab 2041 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2042 if (res != NULL)
deee9369 2043 path.dentry = res;
d75340cc 2044 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2045 nfs_unblock_sillyrename(parent);
dc0b027d 2046 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2047 return res;
1da177e4
LT		 2048}
2049
2050int
02a913a7 2051nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2052{
ad389da7 2053 struct path path = {
4ac91378 2054 .mnt = nd->path.mnt,
ad389da7
TM		 2055 .dentry = dentry,
2056 };
1da177e4
LT		 2057 struct rpc_cred *cred;
2058 struct nfs4_state *state;
dc0b027d 2059 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2060
98a8e323 2061 cred = rpc_lookup_cred();
1da177e4
LT		 2062 if (IS_ERR(cred))
2063 return PTR_ERR(cred);
dc0b027d 2064 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2065 put_rpccred(cred);
02a913a7
TM		 2066 if (IS_ERR(state)) {
2067 switch (PTR_ERR(state)) {
2068 case -EPERM:
2069 case -EACCES:
2070 case -EDQUOT:
2071 case -ENOSPC:
2072 case -EROFS:
04287f97 2073 return PTR_ERR(state);
b87c0adf
CL		 2074 default:
2075 goto out_drop;
02a913a7 2076 }
02a913a7 2077 }
24ac23ab 2078 if (state->inode == dentry->d_inode) {
d75340cc 2079 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2080 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2081 return 1;
2082 }
dc0b027d 2083 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2084out_drop:
2085 d_drop(dentry);
1da177e4
LT		 2086 return 0;
2087}
2088
1185a552 2089static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2090{
2091 if (ctx->state == NULL)
2092 return;
2093 if (is_sync)
2094 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2095 else
2096 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2097}
1da177e4
LT		 2098
2099static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2100{
43652ad5
BH		 2101 struct nfs4_server_caps_arg args = {
2102 .fhandle = fhandle,
2103 };
1da177e4
LT		 2104 struct nfs4_server_caps_res res = {};
2105 struct rpc_message msg = {
2106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2107 .rpc_argp = &args,
1da177e4
LT		 2108 .rpc_resp = &res,
2109 };
2110 int status;
2111
cccef3b9 2112 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2113 if (status == 0) {
2114 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2115 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2116 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2117 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2118 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2119 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2120 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2121 server->caps |= NFS_CAP_ACLS;
2122 if (res.has_links != 0)
2123 server->caps |= NFS_CAP_HARDLINKS;
2124 if (res.has_symlinks != 0)
2125 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2126 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2127 server->caps |= NFS_CAP_FILEID;
2128 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2129 server->caps |= NFS_CAP_MODE;
2130 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2131 server->caps |= NFS_CAP_NLINK;
2132 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2133 server->caps |= NFS_CAP_OWNER;
2134 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2135 server->caps |= NFS_CAP_OWNER_GROUP;
2136 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2137 server->caps |= NFS_CAP_ATIME;
2138 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2139 server->caps |= NFS_CAP_CTIME;
2140 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2141 server->caps |= NFS_CAP_MTIME;
2142
a65318bf
TM		 2143 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2144 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2145 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2146 server->acl_bitmask = res.acl_bitmask;
2147 }
cccef3b9 2148
1da177e4
LT		 2149 return status;
2150}
2151
55a97593 2152int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2153{
2154 struct nfs4_exception exception = { };
2155 int err;
2156 do {
2157 err = nfs4_handle_exception(server,
2158 _nfs4_server_capabilities(server, fhandle),
2159 &exception);
2160 } while (exception.retry);
2161 return err;
2162}
2163
2164static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2165 struct nfs_fsinfo *info)
2166{
1da177e4
LT		 2167 struct nfs4_lookup_root_arg args = {
2168 .bitmask = nfs4_fattr_bitmap,
2169 };
2170 struct nfs4_lookup_res res = {
2171 .server = server,
0e574af1 2172 .fattr = info->fattr,
1da177e4
LT		 2173 .fh = fhandle,
2174 };
2175 struct rpc_message msg = {
2176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2177 .rpc_argp = &args,
2178 .rpc_resp = &res,
2179 };
008f55d0 2180
0e574af1 2181 nfs_fattr_init(info->fattr);
fccba804 2182 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2183}
2184
2185static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2186 struct nfs_fsinfo *info)
2187{
2188 struct nfs4_exception exception = { };
2189 int err;
2190 do {
2191 err = nfs4_handle_exception(server,
2192 _nfs4_lookup_root(server, fhandle, info),
2193 &exception);
2194 } while (exception.retry);
2195 return err;
2196}
2197
54ceac45
DH		 2198/*
2199 * get the file handle for the "/" directory on the server
2200 */
1da177e4 2201static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2202 struct nfs_fsinfo *info)
1da177e4 2203{
1da177e4
LT		 2204 int status;
2205
1da177e4 2206 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2207 if (status == 0)
2208 status = nfs4_server_capabilities(server, fhandle);
2209 if (status == 0)
2210 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2211 return nfs4_map_errors(status);
1da177e4
LT		 2212}
2213
6b97fd3d
MN		 2214/*
2215 * Get locations and (maybe) other attributes of a referral.
2216 * Note that we'll actually follow the referral later when
2217 * we detect fsid mismatch in inode revalidation
2218 */
56659e99 2219static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2220{
2221 int status = -ENOMEM;
2222 struct page *page = NULL;
2223 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2224
2225 page = alloc_page(GFP_KERNEL);
2226 if (page == NULL)
2227 goto out;
2228 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2229 if (locations == NULL)
2230 goto out;
2231
c228fd3a 2232 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2233 if (status != 0)
2234 goto out;
2235 /* Make sure server returned a different fsid for the referral */
2236 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2237 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2238 status = -EIO;
2239 goto out;
2240 }
2241
2242 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2243 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2244 if (!fattr->mode)
2245 fattr->mode = S_IFDIR;
2246 memset(fhandle, 0, sizeof(struct nfs_fh));
2247out:
2248 if (page)
2249 __free_page(page);
2250 if (locations)
2251 kfree(locations);
2252 return status;
2253}
2254
1da177e4
LT		 2255static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2256{
2257 struct nfs4_getattr_arg args = {
2258 .fh = fhandle,
2259 .bitmask = server->attr_bitmask,
2260 };
2261 struct nfs4_getattr_res res = {
2262 .fattr = fattr,
2263 .server = server,
2264 };
2265 struct rpc_message msg = {
2266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2267 .rpc_argp = &args,
2268 .rpc_resp = &res,
2269 };
2270
0e574af1 2271 nfs_fattr_init(fattr);
cccef3b9 2272 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2273}
2274
2275static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2276{
2277 struct nfs4_exception exception = { };
2278 int err;
2279 do {
2280 err = nfs4_handle_exception(server,
2281 _nfs4_proc_getattr(server, fhandle, fattr),
2282 &exception);
2283 } while (exception.retry);
2284 return err;
2285}
2286
2287/*
2288 * The file is not closed if it is opened due to the a request to change
2289 * the size of the file. The open call will not be needed once the
2290 * VFS layer lookup-intents are implemented.
2291 *
2292 * Close is called when the inode is destroyed.
2293 * If we haven't opened the file for O_WRONLY, we
2294 * need to in the size_change case to obtain a stateid.
2295 *
2296 * Got race?
2297 * Because OPEN is always done by name in nfsv4, it is
2298 * possible that we opened a different file by the same
2299 * name. We can recognize this race condition, but we
2300 * can't do anything about it besides returning an error.
2301 *
2302 * This will be fixed with VFS changes (lookup-intent).
2303 */
2304static int
2305nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2306 struct iattr *sattr)
2307{
08e9eac4 2308 struct inode *inode = dentry->d_inode;
659bfcd6 2309 struct rpc_cred *cred = NULL;
d530838b 2310 struct nfs4_state *state = NULL;
1da177e4
LT		 2311 int status;
2312
0e574af1 2313 nfs_fattr_init(fattr);
1da177e4 2314
d530838b 2315 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2316 if (sattr->ia_valid & ATTR_FILE) {
2317 struct nfs_open_context *ctx;
2318
2319 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2320 if (ctx) {
2321 cred = ctx->cred;
2322 state = ctx->state;
2323 }
659bfcd6 2324 }
08e9eac4 2325
659bfcd6 2326 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2327 if (status == 0)
2328 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2329 return status;
2330}
2331
56659e99
TM		 2332static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2333 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2334 struct nfs_fattr *fattr)
2335{
2336 int status;
2337 struct nfs4_lookup_arg args = {
2338 .bitmask = server->attr_bitmask,
2339 .dir_fh = dirfh,
2340 .name = name,
2341 };
2342 struct nfs4_lookup_res res = {
2343 .server = server,
2344 .fattr = fattr,
2345 .fh = fhandle,
2346 };
2347 struct rpc_message msg = {
2348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2349 .rpc_argp = &args,
2350 .rpc_resp = &res,
2351 };
2352
2353 nfs_fattr_init(fattr);
2354
2355 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2356 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2357 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2358 return status;
2359}
2360
2361static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2362 struct qstr *name, struct nfs_fh *fhandle,
2363 struct nfs_fattr *fattr)
2364{
2365 struct nfs4_exception exception = { };
2366 int err;
2367 do {
4e56e082
TM		 2368 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2369 /* FIXME: !!!! */
2370 if (err == -NFS4ERR_MOVED) {
2371 err = -EREMOTE;
2372 break;
2373 }
2374 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2375 } while (exception.retry);
2376 return err;
2377}
2378
56659e99 2379static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2380 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2381{
4e56e082 2382 int status;
1da177e4
LT		 2383
2384 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2385 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2386 if (status == -NFS4ERR_MOVED)
2387 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2388 dprintk("NFS reply lookup: %d\n", status);
2389 return status;
2390}
2391
2392static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2393{
2394 struct nfs4_exception exception = { };
2395 int err;
2396 do {
2397 err = nfs4_handle_exception(NFS_SERVER(dir),
2398 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2399 &exception);
2400 } while (exception.retry);
2401 return err;
2402}
2403
2404static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2405{
76b32999 2406 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2407 struct nfs4_accessargs args = {
2408 .fh = NFS_FH(inode),
76b32999
TM		 2409 .bitmask = server->attr_bitmask,
2410 };
2411 struct nfs4_accessres res = {
2412 .server = server,
1da177e4 2413 };
1da177e4
LT		 2414 struct rpc_message msg = {
2415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2416 .rpc_argp = &args,
2417 .rpc_resp = &res,
2418 .rpc_cred = entry->cred,
2419 };
2420 int mode = entry->mask;
2421 int status;
2422
2423 /*
2424 * Determine which access bits we want to ask for...
2425 */
2426 if (mode & MAY_READ)
2427 args.access |= NFS4_ACCESS_READ;
2428 if (S_ISDIR(inode->i_mode)) {
2429 if (mode & MAY_WRITE)
2430 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2431 if (mode & MAY_EXEC)
2432 args.access |= NFS4_ACCESS_LOOKUP;
2433 } else {
2434 if (mode & MAY_WRITE)
2435 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2436 if (mode & MAY_EXEC)
2437 args.access |= NFS4_ACCESS_EXECUTE;
2438 }
c407d41a
TM		 2439
2440 res.fattr = nfs_alloc_fattr();
2441 if (res.fattr == NULL)
2442 return -ENOMEM;
2443
cccef3b9 2444 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2445 if (!status) {
2446 entry->mask = 0;
2447 if (res.access & NFS4_ACCESS_READ)
2448 entry->mask |= MAY_READ;
2449 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2450 entry->mask |= MAY_WRITE;
2451 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2452 entry->mask |= MAY_EXEC;
c407d41a 2453 nfs_refresh_inode(inode, res.fattr);
1da177e4 2454 }
c407d41a 2455 nfs_free_fattr(res.fattr);
1da177e4
LT		 2456 return status;
2457}
2458
2459static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2460{
2461 struct nfs4_exception exception = { };
2462 int err;
2463 do {
2464 err = nfs4_handle_exception(NFS_SERVER(inode),
2465 _nfs4_proc_access(inode, entry),
2466 &exception);
2467 } while (exception.retry);
2468 return err;
2469}
2470
2471/*
2472 * TODO: For the time being, we don't try to get any attributes
2473 * along with any of the zero-copy operations READ, READDIR,
2474 * READLINK, WRITE.
2475 *
2476 * In the case of the first three, we want to put the GETATTR
2477 * after the read-type operation -- this is because it is hard
2478 * to predict the length of a GETATTR response in v4, and thus
2479 * align the READ data correctly. This means that the GETATTR
2480 * may end up partially falling into the page cache, and we should
2481 * shift it into the 'tail' of the xdr_buf before processing.
2482 * To do this efficiently, we need to know the total length
2483 * of data received, which doesn't seem to be available outside
2484 * of the RPC layer.
2485 *
2486 * In the case of WRITE, we also want to put the GETATTR after
2487 * the operation -- in this case because we want to make sure
2488 * we get the post-operation mtime and size. This means that
2489 * we can't use xdr_encode_pages() as written: we need a variant
2490 * of it which would leave room in the 'tail' iovec.
2491 *
2492 * Both of these changes to the XDR layer would in fact be quite
2493 * minor, but I decided to leave them for a subsequent patch.
2494 */
2495static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2496 unsigned int pgbase, unsigned int pglen)
2497{
2498 struct nfs4_readlink args = {
2499 .fh = NFS_FH(inode),
2500 .pgbase = pgbase,
2501 .pglen = pglen,
2502 .pages = &page,
2503 };
f50c7000 2504 struct nfs4_readlink_res res;
1da177e4
LT		 2505 struct rpc_message msg = {
2506 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2507 .rpc_argp = &args,
f50c7000 2508 .rpc_resp = &res,
1da177e4
LT		 2509 };
2510
cccef3b9 2511 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2512}
2513
2514static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2515 unsigned int pgbase, unsigned int pglen)
2516{
2517 struct nfs4_exception exception = { };
2518 int err;
2519 do {
2520 err = nfs4_handle_exception(NFS_SERVER(inode),
2521 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2522 &exception);
2523 } while (exception.retry);
2524 return err;
2525}
2526
1da177e4
LT		 2527/*
2528 * Got race?
2529 * We will need to arrange for the VFS layer to provide an atomic open.
2530 * Until then, this create/open method is prone to inefficiency and race
2531 * conditions due to the lookup, create, and open VFS calls from sys_open()
2532 * placed on the wire.
2533 *
2534 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2535 * The file will be opened again in the subsequent VFS open call
2536 * (nfs4_proc_file_open).
2537 *
2538 * The open for read will just hang around to be used by any process that
2539 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2540 */
2541
2542static int
2543nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2544 int flags, struct nameidata *nd)
1da177e4 2545{
ad389da7 2546 struct path path = {
4ac91378 2547 .mnt = nd->path.mnt,
ad389da7
TM		 2548 .dentry = dentry,
2549 };
1da177e4
LT		 2550 struct nfs4_state *state;
2551 struct rpc_cred *cred;
dc0b027d 2552 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2553 int status = 0;
2554
98a8e323 2555 cred = rpc_lookup_cred();
1da177e4
LT		 2556 if (IS_ERR(cred)) {
2557 status = PTR_ERR(cred);
2558 goto out;
2559 }
dc0b027d 2560 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2561 d_drop(dentry);
1da177e4
LT		 2562 if (IS_ERR(state)) {
2563 status = PTR_ERR(state);
659bfcd6 2564 goto out_putcred;
1da177e4 2565 }
d4d9cdcb 2566 d_add(dentry, igrab(state->inode));
d75340cc 2567 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2568 if (flags & O_EXCL) {
2569 struct nfs_fattr fattr;
659bfcd6 2570 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2571 if (status == 0)
65e4308d 2572 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2573 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2574 }
ad389da7 2575 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2576 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2577 else
dc0b027d 2578 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2579out_putcred:
2580 put_rpccred(cred);
1da177e4
LT		 2581out:
2582 return status;
2583}
2584
2585static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2586{
16e42959 2587 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2588 struct nfs_removeargs args = {
1da177e4 2589 .fh = NFS_FH(dir),
4fdc17b2
TM		 2590 .name.len = name->len,
2591 .name.name = name->name,
16e42959
TM		 2592 .bitmask = server->attr_bitmask,
2593 };
4fdc17b2 2594 struct nfs_removeres res = {
16e42959 2595 .server = server,
1da177e4 2596 };
1da177e4 2597 struct rpc_message msg = {
4fdc17b2
TM		 2598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2599 .rpc_argp = &args,
2600 .rpc_resp = &res,
1da177e4
LT		 2601 };
2602 int status;
2603
4fdc17b2 2604 nfs_fattr_init(&res.dir_attr);
cccef3b9 2605 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2606 if (status == 0) {
2607 update_changeattr(dir, &res.cinfo);
4fdc17b2 2608 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2609 }
1da177e4
LT		 2610 return status;
2611}
2612
2613static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2614{
2615 struct nfs4_exception exception = { };
2616 int err;
2617 do {
2618 err = nfs4_handle_exception(NFS_SERVER(dir),
2619 _nfs4_proc_remove(dir, name),
2620 &exception);
2621 } while (exception.retry);
2622 return err;
2623}
2624
e4eff1a6 2625static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2626{
e4eff1a6
TM		 2627 struct nfs_server *server = NFS_SERVER(dir);
2628 struct nfs_removeargs *args = msg->rpc_argp;
2629 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2630
a65318bf 2631 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2632 res->server = server;
1da177e4 2633 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2634}
2635
e4eff1a6 2636static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2637{
e4eff1a6
TM		 2638 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2639
472cfbd9 2640 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2641 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2642 return 0;
2643 update_changeattr(dir, &res->cinfo);
2644 nfs_post_op_update_inode(dir, &res->dir_attr);
2645 return 1;
1da177e4
LT		 2646}
2647
2648static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2649 struct inode *new_dir, struct qstr *new_name)
2650{
6caf2c82 2651 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2652 struct nfs4_rename_arg arg = {
2653 .old_dir = NFS_FH(old_dir),
2654 .new_dir = NFS_FH(new_dir),
2655 .old_name = old_name,
2656 .new_name = new_name,
6caf2c82
TM		 2657 .bitmask = server->attr_bitmask,
2658 };
6caf2c82
TM		 2659 struct nfs4_rename_res res = {
2660 .server = server,
1da177e4 2661 };
1da177e4
LT		 2662 struct rpc_message msg = {
2663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2664 .rpc_argp = &arg,
2665 .rpc_resp = &res,
2666 };
011fff72 2667 int status = -ENOMEM;
1da177e4 2668
011fff72
TM		 2669 res.old_fattr = nfs_alloc_fattr();
2670 res.new_fattr = nfs_alloc_fattr();
2671 if (res.old_fattr == NULL || res.new_fattr == NULL)
2672 goto out;
1da177e4 2673
011fff72 2674 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2675 if (!status) {
2676 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2677 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2678 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2679 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2680 }
011fff72
TM		 2681out:
2682 nfs_free_fattr(res.new_fattr);
2683 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2684 return status;
2685}
2686
2687static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2688 struct inode *new_dir, struct qstr *new_name)
2689{
2690 struct nfs4_exception exception = { };
2691 int err;
2692 do {
2693 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2694 _nfs4_proc_rename(old_dir, old_name,
2695 new_dir, new_name),
2696 &exception);
2697 } while (exception.retry);
2698 return err;
2699}
2700
2701static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2702{
91ba2eee 2703 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2704 struct nfs4_link_arg arg = {
2705 .fh = NFS_FH(inode),
2706 .dir_fh = NFS_FH(dir),
2707 .name = name,
91ba2eee
TM		 2708 .bitmask = server->attr_bitmask,
2709 };
2710 struct nfs_fattr fattr, dir_attr;
2711 struct nfs4_link_res res = {
2712 .server = server,
2713 .fattr = &fattr,
2714 .dir_attr = &dir_attr,
1da177e4 2715 };
1da177e4
LT		 2716 struct rpc_message msg = {
2717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2718 .rpc_argp = &arg,
91ba2eee 2719 .rpc_resp = &res,
1da177e4
LT		 2720 };
2721 int status;
2722
91ba2eee
TM		 2723 nfs_fattr_init(res.fattr);
2724 nfs_fattr_init(res.dir_attr);
cccef3b9 2725 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2726 if (!status) {
2727 update_changeattr(dir, &res.cinfo);
2728 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2729 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2730 }
1da177e4
LT		 2731
2732 return status;
2733}
2734
2735static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2736{
2737 struct nfs4_exception exception = { };
2738 int err;
2739 do {
2740 err = nfs4_handle_exception(NFS_SERVER(inode),
2741 _nfs4_proc_link(inode, dir, name),
2742 &exception);
2743 } while (exception.retry);
2744 return err;
2745}
2746
57dc9a57
TM		 2747struct nfs4_createdata {
2748 struct rpc_message msg;
2749 struct nfs4_create_arg arg;
2750 struct nfs4_create_res res;
2751 struct nfs_fh fh;
2752 struct nfs_fattr fattr;
2753 struct nfs_fattr dir_fattr;
2754};
2755
2756static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2757 struct qstr *name, struct iattr *sattr, u32 ftype)
2758{
2759 struct nfs4_createdata *data;
2760
2761 data = kzalloc(sizeof(*data), GFP_KERNEL);
2762 if (data != NULL) {
2763 struct nfs_server *server = NFS_SERVER(dir);
2764
2765 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2766 data->msg.rpc_argp = &data->arg;
2767 data->msg.rpc_resp = &data->res;
2768 data->arg.dir_fh = NFS_FH(dir);
2769 data->arg.server = server;
2770 data->arg.name = name;
2771 data->arg.attrs = sattr;
2772 data->arg.ftype = ftype;
2773 data->arg.bitmask = server->attr_bitmask;
2774 data->res.server = server;
2775 data->res.fh = &data->fh;
2776 data->res.fattr = &data->fattr;
2777 data->res.dir_fattr = &data->dir_fattr;
2778 nfs_fattr_init(data->res.fattr);
2779 nfs_fattr_init(data->res.dir_fattr);
2780 }
2781 return data;
2782}
2783
2784static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2785{
cccef3b9
AA		 2786 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2787 &data->arg, &data->res, 1);
57dc9a57
TM		 2788 if (status == 0) {
2789 update_changeattr(dir, &data->res.dir_cinfo);
2790 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2791 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2792 }
2793 return status;
2794}
2795
2796static void nfs4_free_createdata(struct nfs4_createdata *data)
2797{
2798 kfree(data);
2799}
2800
4f390c15 2801static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2802 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2803{
57dc9a57
TM		 2804 struct nfs4_createdata *data;
2805 int status = -ENAMETOOLONG;
1da177e4 2806
94a6d753 2807 if (len > NFS4_MAXPATHLEN)
57dc9a57 2808 goto out;
4f390c15 2809
57dc9a57
TM		 2810 status = -ENOMEM;
2811 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2812 if (data == NULL)
2813 goto out;
2814
2815 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2816 data->arg.u.symlink.pages = &page;
2817 data->arg.u.symlink.len = len;
1da177e4 2818
57dc9a57
TM		 2819 status = nfs4_do_create(dir, dentry, data);
2820
2821 nfs4_free_createdata(data);
2822out:
1da177e4
LT		 2823 return status;
2824}
2825
4f390c15 2826static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2827 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2828{
2829 struct nfs4_exception exception = { };
2830 int err;
2831 do {
2832 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2833 _nfs4_proc_symlink(dir, dentry, page,
2834 len, sattr),
1da177e4
LT		 2835 &exception);
2836 } while (exception.retry);
2837 return err;
2838}
2839
2840static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2841 struct iattr *sattr)
2842{
57dc9a57
TM		 2843 struct nfs4_createdata *data;
2844 int status = -ENOMEM;
1da177e4 2845
57dc9a57
TM		 2846 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2847 if (data == NULL)
2848 goto out;
2849
2850 status = nfs4_do_create(dir, dentry, data);
2851
2852 nfs4_free_createdata(data);
2853out:
1da177e4
LT		 2854 return status;
2855}
2856
2857static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2858 struct iattr *sattr)
2859{
2860 struct nfs4_exception exception = { };
2861 int err;
2862 do {
2863 err = nfs4_handle_exception(NFS_SERVER(dir),
2864 _nfs4_proc_mkdir(dir, dentry, sattr),
2865 &exception);
2866 } while (exception.retry);
2867 return err;
2868}
2869
2870static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2871 u64 cookie, struct page *page, unsigned int count, int plus)
2872{
2873 struct inode *dir = dentry->d_inode;
2874 struct nfs4_readdir_arg args = {
2875 .fh = NFS_FH(dir),
2876 .pages = &page,
2877 .pgbase = 0,
2878 .count = count,
96d25e53 2879 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2880 };
2881 struct nfs4_readdir_res res;
2882 struct rpc_message msg = {
2883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2884 .rpc_argp = &args,
2885 .rpc_resp = &res,
2886 .rpc_cred = cred,
2887 };
2888 int status;
2889
3110ff80 2890 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2891 dentry->d_parent->d_name.name,
2892 dentry->d_name.name,
2893 (unsigned long long)cookie);
1da177e4
LT		 2894 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2895 res.pgbase = args.pgbase;
cccef3b9 2896 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2897 if (status == 0)
2898 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2899
2900 nfs_invalidate_atime(dir);
2901
3110ff80 2902 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2903 return status;
2904}
2905
2906static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2907 u64 cookie, struct page *page, unsigned int count, int plus)
2908{
2909 struct nfs4_exception exception = { };
2910 int err;
2911 do {
2912 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2913 _nfs4_proc_readdir(dentry, cred, cookie,
2914 page, count, plus),
2915 &exception);
2916 } while (exception.retry);
2917 return err;
2918}
2919
2920static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2921 struct iattr *sattr, dev_t rdev)
2922{
57dc9a57
TM		 2923 struct nfs4_createdata *data;
2924 int mode = sattr->ia_mode;
2925 int status = -ENOMEM;
1da177e4
LT		 2926
2927 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2928 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2929
2930 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2931 if (data == NULL)
2932 goto out;
2933
1da177e4 2934 if (S_ISFIFO(mode))
57dc9a57 2935 data->arg.ftype = NF4FIFO;
1da177e4 2936 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2937 data->arg.ftype = NF4BLK;
2938 data->arg.u.device.specdata1 = MAJOR(rdev);
2939 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2940 }
2941 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2942 data->arg.ftype = NF4CHR;
2943 data->arg.u.device.specdata1 = MAJOR(rdev);
2944 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2945 }
1da177e4 2946
57dc9a57
TM		 2947 status = nfs4_do_create(dir, dentry, data);
2948
2949 nfs4_free_createdata(data);
2950out:
1da177e4
LT		 2951 return status;
2952}
2953
2954static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2955 struct iattr *sattr, dev_t rdev)
2956{
2957 struct nfs4_exception exception = { };
2958 int err;
2959 do {
2960 err = nfs4_handle_exception(NFS_SERVER(dir),
2961 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2962 &exception);
2963 } while (exception.retry);
2964 return err;
2965}
2966
2967static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2968 struct nfs_fsstat *fsstat)
2969{
2970 struct nfs4_statfs_arg args = {
2971 .fh = fhandle,
2972 .bitmask = server->attr_bitmask,
2973 };
24ad148a
BH		 2974 struct nfs4_statfs_res res = {
2975 .fsstat = fsstat,
2976 };
1da177e4
LT		 2977 struct rpc_message msg = {
2978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2979 .rpc_argp = &args,
24ad148a 2980 .rpc_resp = &res,
1da177e4
LT		 2981 };
2982
0e574af1 2983 nfs_fattr_init(fsstat->fattr);
cccef3b9 2984 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2985}
2986
2987static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2988{
2989 struct nfs4_exception exception = { };
2990 int err;
2991 do {
2992 err = nfs4_handle_exception(server,
2993 _nfs4_proc_statfs(server, fhandle, fsstat),
2994 &exception);
2995 } while (exception.retry);
2996 return err;
2997}
2998
2999static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3000 struct nfs_fsinfo *fsinfo)
3001{
3002 struct nfs4_fsinfo_arg args = {
3003 .fh = fhandle,
3004 .bitmask = server->attr_bitmask,
3005 };
3dda5e43
BH		 3006 struct nfs4_fsinfo_res res = {
3007 .fsinfo = fsinfo,
3008 };
1da177e4
LT		 3009 struct rpc_message msg = {
3010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3011 .rpc_argp = &args,
3dda5e43 3012 .rpc_resp = &res,
1da177e4
LT		 3013 };
3014
cccef3b9 3015 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3016}
3017
3018static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3019{
3020 struct nfs4_exception exception = { };
3021 int err;
3022
3023 do {
3024 err = nfs4_handle_exception(server,
3025 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3026 &exception);
3027 } while (exception.retry);
3028 return err;
3029}
3030
3031static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3032{
0e574af1 3033 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3034 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3035}
3036
3037static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3038 struct nfs_pathconf *pathconf)
3039{
3040 struct nfs4_pathconf_arg args = {
3041 .fh = fhandle,
3042 .bitmask = server->attr_bitmask,
3043 };
d45b2989
BH		 3044 struct nfs4_pathconf_res res = {
3045 .pathconf = pathconf,
3046 };
1da177e4
LT		 3047 struct rpc_message msg = {
3048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3049 .rpc_argp = &args,
d45b2989 3050 .rpc_resp = &res,
1da177e4
LT		 3051 };
3052
3053 /* None of the pathconf attributes are mandatory to implement */
3054 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3055 memset(pathconf, 0, sizeof(*pathconf));
3056 return 0;
3057 }
3058
0e574af1 3059 nfs_fattr_init(pathconf->fattr);
cccef3b9 3060 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3061}
3062
3063static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3064 struct nfs_pathconf *pathconf)
3065{
3066 struct nfs4_exception exception = { };
3067 int err;
3068
3069 do {
3070 err = nfs4_handle_exception(server,
3071 _nfs4_proc_pathconf(server, fhandle, pathconf),
3072 &exception);
3073 } while (exception.retry);
3074 return err;
3075}
3076
ec06c096 3077static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3078{
ec06c096 3079 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3080
f11c88af
AA		 3081 dprintk("--> %s\n", __func__);
3082
f11c88af
AA		 3083 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3084
9e33bed5 3085 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3086 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3087 return -EAGAIN;
1da177e4 3088 }
8850df99
TM		 3089
3090 nfs_invalidate_atime(data->inode);
1da177e4 3091 if (task->tk_status > 0)
ec06c096
TM		 3092 renew_lease(server, data->timestamp);
3093 return 0;
1da177e4
LT		 3094}
3095
bdc7f021 3096static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3097{
1da177e4 3098 data->timestamp = jiffies;
bdc7f021 3099 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3100}
3101
788e7a89 3102static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3103{
1da177e4
LT		 3104 struct inode *inode = data->inode;
3105
def6ed7e
AA		 3106 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3107 task->tk_status);
3108
9e33bed5 3109 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3110 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3111 return -EAGAIN;
1da177e4 3112 }
4f9838c7 3113 if (task->tk_status >= 0) {
1da177e4 3114 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3115 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3116 }
788e7a89 3117 return 0;
1da177e4
LT		 3118}
3119
bdc7f021 3120static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3121{
bdc7f021
TM		 3122 struct nfs_server *server = NFS_SERVER(data->inode);
3123
a65318bf 3124 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3125 data->res.server = server;
1da177e4
LT		 3126 data->timestamp = jiffies;
3127
bdc7f021 3128 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3129}
3130
788e7a89 3131static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3132{
1da177e4
LT		 3133 struct inode *inode = data->inode;
3134
21d9a851
AA		 3135 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3136 task->tk_status);
9e33bed5 3137 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3138 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3139 return -EAGAIN;
1da177e4 3140 }
9e08a3c5 3141 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3142 return 0;
1da177e4
LT		 3143}
3144
bdc7f021 3145static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3146{
788e7a89 3147 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3148
a65318bf 3149 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3150 data->res.server = server;
bdc7f021 3151 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3152}
3153
3154/*
3155 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3156 * standalone procedure for queueing an asynchronous RENEW.
3157 */
dc96aef9
AB		 3158static void nfs4_renew_release(void *data)
3159{
3160 struct nfs_client *clp = data;
3161
0851de06
AB		 3162 if (atomic_read(&clp->cl_count) > 1)
3163 nfs4_schedule_state_renewal(clp);
3164 nfs_put_client(clp);
dc96aef9
AB		 3165}
3166
963d8fe5 3167static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3168{
dc96aef9
AB		 3169 struct nfs_client *clp = data;
3170 unsigned long timestamp = task->tk_start;
1da177e4
LT		 3171
3172 if (task->tk_status < 0) {
95baa25c
TM		 3173 /* Unless we're shutting down, schedule state recovery! */
3174 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3175 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3176 return;
3177 }
3178 spin_lock(&clp->cl_lock);
3179 if (time_before(clp->cl_last_renewal,timestamp))
3180 clp->cl_last_renewal = timestamp;
3181 spin_unlock(&clp->cl_lock);
3182}
3183
963d8fe5
TM		 3184static const struct rpc_call_ops nfs4_renew_ops = {
3185 .rpc_call_done = nfs4_renew_done,
dc96aef9 3186 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3187};
3188
adfa6f98 3189int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3190{
3191 struct rpc_message msg = {
3192 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3193 .rpc_argp = clp,
b4454fe1 3194 .rpc_cred = cred,
1da177e4
LT		 3195 };
3196
0851de06
AB		 3197 if (!atomic_inc_not_zero(&clp->cl_count))
3198 return -EIO;
1da177e4 3199 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
dc96aef9 3200 &nfs4_renew_ops, clp);
1da177e4
LT		 3201}
3202
adfa6f98 3203int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3204{
3205 struct rpc_message msg = {
3206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3207 .rpc_argp = clp,
b4454fe1 3208 .rpc_cred = cred,
1da177e4
LT		 3209 };
3210 unsigned long now = jiffies;
3211 int status;
3212
3213 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3214 if (status < 0)
3215 return status;
3216 spin_lock(&clp->cl_lock);
3217 if (time_before(clp->cl_last_renewal,now))
3218 clp->cl_last_renewal = now;
3219 spin_unlock(&clp->cl_lock);
3220 return 0;
3221}
3222
aa1870af
BF		 3223static inline int nfs4_server_supports_acls(struct nfs_server *server)
3224{
3225 return (server->caps & NFS_CAP_ACLS)
3226 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3227 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3228}
3229
3230/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3231 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3232 * the stack.
3233 */
3234#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3235
3236static void buf_to_pages(const void *buf, size_t buflen,
3237 struct page **pages, unsigned int *pgbase)
3238{
3239 const void *p = buf;
3240
3241 *pgbase = offset_in_page(buf);
3242 p -= *pgbase;
3243 while (p < buf + buflen) {
3244 *(pages++) = virt_to_page(p);
3245 p += PAGE_CACHE_SIZE;
3246 }
3247}
3248
e50a1c2e
BF		 3249struct nfs4_cached_acl {
3250 int cached;
3251 size_t len;
3e9d4154 3252 char data[0];
e50a1c2e
BF		 3253};
3254
3255static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3256{
3257 struct nfs_inode *nfsi = NFS_I(inode);
3258
3259 spin_lock(&inode->i_lock);
3260 kfree(nfsi->nfs4_acl);
3261 nfsi->nfs4_acl = acl;
3262 spin_unlock(&inode->i_lock);
3263}
3264
3265static void nfs4_zap_acl_attr(struct inode *inode)
3266{
3267 nfs4_set_cached_acl(inode, NULL);
3268}
3269
3270static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3271{
3272 struct nfs_inode *nfsi = NFS_I(inode);
3273 struct nfs4_cached_acl *acl;
3274 int ret = -ENOENT;
3275
3276 spin_lock(&inode->i_lock);
3277 acl = nfsi->nfs4_acl;
3278 if (acl == NULL)
3279 goto out;
3280 if (buf == NULL) /* user is just asking for length */
3281 goto out_len;
3282 if (acl->cached == 0)
3283 goto out;
3284 ret = -ERANGE; /* see getxattr(2) man page */
3285 if (acl->len > buflen)
3286 goto out;
3287 memcpy(buf, acl->data, acl->len);
3288out_len:
3289 ret = acl->len;
3290out:
3291 spin_unlock(&inode->i_lock);
3292 return ret;
3293}
3294
3295static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3296{
3297 struct nfs4_cached_acl *acl;
3298
3299 if (buf && acl_len <= PAGE_SIZE) {
3300 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3301 if (acl == NULL)
3302 goto out;
3303 acl->cached = 1;
3304 memcpy(acl->data, buf, acl_len);
3305 } else {
3306 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3307 if (acl == NULL)
3308 goto out;
3309 acl->cached = 0;
3310 }
3311 acl->len = acl_len;
3312out:
3313 nfs4_set_cached_acl(inode, acl);
3314}
3315
16b4289c 3316static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3317{
aa1870af
BF		 3318 struct page *pages[NFS4ACL_MAXPAGES];
3319 struct nfs_getaclargs args = {
3320 .fh = NFS_FH(inode),
3321 .acl_pages = pages,
3322 .acl_len = buflen,
3323 };
663c79b3
BH		 3324 struct nfs_getaclres res = {
3325 .acl_len = buflen,
3326 };
e50a1c2e 3327 void *resp_buf;
aa1870af
BF		 3328 struct rpc_message msg = {
3329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3330 .rpc_argp = &args,
663c79b3 3331 .rpc_resp = &res,
aa1870af 3332 };
e50a1c2e 3333 struct page *localpage = NULL;
aa1870af
BF		 3334 int ret;
3335
e50a1c2e
BF		 3336 if (buflen < PAGE_SIZE) {
3337 /* As long as we're doing a round trip to the server anyway,
3338 * let's be prepared for a page of acl data. */
3339 localpage = alloc_page(GFP_KERNEL);
3340 resp_buf = page_address(localpage);
3341 if (localpage == NULL)
3342 return -ENOMEM;
3343 args.acl_pages[0] = localpage;
3344 args.acl_pgbase = 0;
663c79b3 3345 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3346 } else {
3347 resp_buf = buf;
3348 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3349 }
cccef3b9 3350 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3351 if (ret)
3352 goto out_free;
663c79b3
BH		 3353 if (res.acl_len > args.acl_len)
3354 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3355 else
663c79b3 3356 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3357 if (buf) {
3358 ret = -ERANGE;
663c79b3 3359 if (res.acl_len > buflen)
e50a1c2e
BF		 3360 goto out_free;
3361 if (localpage)
663c79b3 3362 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3363 }
663c79b3 3364 ret = res.acl_len;
e50a1c2e
BF		 3365out_free:
3366 if (localpage)
3367 __free_page(localpage);
aa1870af
BF		 3368 return ret;
3369}
3370
16b4289c
TM		 3371static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3372{
3373 struct nfs4_exception exception = { };
3374 ssize_t ret;
3375 do {
3376 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3377 if (ret >= 0)
3378 break;
3379 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3380 } while (exception.retry);
3381 return ret;
3382}
3383
e50a1c2e
BF		 3384static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3385{
3386 struct nfs_server *server = NFS_SERVER(inode);
3387 int ret;
3388
3389 if (!nfs4_server_supports_acls(server))
3390 return -EOPNOTSUPP;
3391 ret = nfs_revalidate_inode(server, inode);
3392 if (ret < 0)
3393 return ret;
3394 ret = nfs4_read_cached_acl(inode, buf, buflen);
3395 if (ret != -ENOENT)
3396 return ret;
3397 return nfs4_get_acl_uncached(inode, buf, buflen);
3398}
3399
16b4289c 3400static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3401{
3402 struct nfs_server *server = NFS_SERVER(inode);
3403 struct page *pages[NFS4ACL_MAXPAGES];
3404 struct nfs_setaclargs arg = {
3405 .fh = NFS_FH(inode),
3406 .acl_pages = pages,
3407 .acl_len = buflen,
3408 };
73c403a9 3409 struct nfs_setaclres res;
4b580ee3
BF		 3410 struct rpc_message msg = {
3411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3412 .rpc_argp = &arg,
73c403a9 3413 .rpc_resp = &res,
4b580ee3
BF		 3414 };
3415 int ret;
3416
3417 if (!nfs4_server_supports_acls(server))
3418 return -EOPNOTSUPP;
642ac549 3419 nfs_inode_return_delegation(inode);
4b580ee3 3420 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3421 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3422 nfs_access_zap_cache(inode);
3423 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3424 return ret;
3425}
3426
16b4289c
TM		 3427static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3428{
3429 struct nfs4_exception exception = { };
3430 int err;
3431 do {
3432 err = nfs4_handle_exception(NFS_SERVER(inode),
3433 __nfs4_proc_set_acl(inode, buf, buflen),
3434 &exception);
3435 } while (exception.retry);
3436 return err;
3437}
3438
1da177e4 3439static int
8328d59f 3440_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3441{
1da177e4
LT		 3442 if (!clp || task->tk_status >= 0)
3443 return 0;
3444 switch(task->tk_status) {
9e33bed5
TM		 3445 case -NFS4ERR_ADMIN_REVOKED:
3446 case -NFS4ERR_BAD_STATEID:
3447 case -NFS4ERR_OPENMODE:
3448 if (state == NULL)
3449 break;
3450 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3451 goto do_state_recovery;
1da177e4 3452 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3453 if (state == NULL)
3454 break;
3455 nfs4_state_mark_reclaim_reboot(clp, state);
3456 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3457 case -NFS4ERR_EXPIRED:
a2c0b9e2 3458 goto do_state_recovery;
4745e315
AA		 3459#if defined(CONFIG_NFS_V4_1)
3460 case -NFS4ERR_BADSESSION:
3461 case -NFS4ERR_BADSLOT:
3462 case -NFS4ERR_BAD_HIGH_SLOT:
3463 case -NFS4ERR_DEADSESSION:
3464 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3465 case -NFS4ERR_SEQ_FALSE_RETRY:
3466 case -NFS4ERR_SEQ_MISORDERED:
3467 dprintk("%s ERROR %d, Reset session\n", __func__,
3468 task->tk_status);
0b9e2d41 3469 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3470 task->tk_status = 0;
3471 return -EAGAIN;
3472#endif /* CONFIG_NFS_V4_1 */
1da177e4 3473 case -NFS4ERR_DELAY:
8328d59f
AA		 3474 if (server)
3475 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3476 case -NFS4ERR_GRACE:
2c643488 3477 case -EKEYEXPIRED:
1da177e4
LT		 3478 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3479 task->tk_status = 0;
3480 return -EAGAIN;
3481 case -NFS4ERR_OLD_STATEID:
3482 task->tk_status = 0;
3483 return -EAGAIN;
3484 }
3485 task->tk_status = nfs4_map_errors(task->tk_status);
3486 return 0;
a2c0b9e2
TM		 3487do_state_recovery:
3488 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3489 nfs4_schedule_state_recovery(clp);
3490 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3491 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3492 task->tk_status = 0;
3493 return -EAGAIN;
1da177e4
LT		 3494}
3495
8328d59f
AA		 3496static int
3497nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3498{
3499 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3500}
3501
adfa6f98 3502int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3503{
3504 nfs4_verifier sc_verifier;
3505 struct nfs4_setclientid setclientid = {
3506 .sc_verifier = &sc_verifier,
3507 .sc_prog = program,
3508 };
3509 struct rpc_message msg = {
3510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3511 .rpc_argp = &setclientid,
3512 .rpc_resp = clp,
286d7d6a 3513 .rpc_cred = cred,
1da177e4 3514 };
bc4785cd 3515 __be32 *p;
1da177e4
LT		 3516 int loop = 0;
3517 int status;
3518
bc4785cd 3519 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3520 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3521 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3522
3523 for(;;) {
3524 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3525 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3526 clp->cl_ipaddr,
3527 rpc_peeraddr2str(clp->cl_rpcclient,
3528 RPC_DISPLAY_ADDR),
69dd716c
TM		 3529 rpc_peeraddr2str(clp->cl_rpcclient,
3530 RPC_DISPLAY_PROTO),
78ea323b 3531 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3532 clp->cl_id_uniquifier);
3533 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3534 sizeof(setclientid.sc_netid),
3535 rpc_peeraddr2str(clp->cl_rpcclient,
3536 RPC_DISPLAY_NETID));
1da177e4 3537 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3538 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3539 clp->cl_ipaddr, port >> 8, port & 255);
3540
3541 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3542 if (status != -NFS4ERR_CLID_INUSE)
3543 break;
3544 if (signalled())
3545 break;
3546 if (loop++ & 1)
3547 ssleep(clp->cl_lease_time + 1);
3548 else
3549 if (++clp->cl_id_uniquifier == 0)
3550 break;
3551 }
3552 return status;
3553}
3554
adfa6f98 3555static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3556{
3557 struct nfs_fsinfo fsinfo;
3558 struct rpc_message msg = {
3559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3560 .rpc_argp = clp,
3561 .rpc_resp = &fsinfo,
286d7d6a 3562 .rpc_cred = cred,
1da177e4
LT		 3563 };
3564 unsigned long now;
3565 int status;
3566
3567 now = jiffies;
3568 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3569 if (status == 0) {
3570 spin_lock(&clp->cl_lock);
3571 clp->cl_lease_time = fsinfo.lease_time * HZ;
3572 clp->cl_last_renewal = now;
3573 spin_unlock(&clp->cl_lock);
3574 }
3575 return status;
3576}
3577
adfa6f98 3578int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3579{
77e03677 3580 long timeout = 0;
51581f3b
TM		 3581 int err;
3582 do {
3583 err = _nfs4_proc_setclientid_confirm(clp, cred);
3584 switch (err) {
3585 case 0:
3586 return err;
3587 case -NFS4ERR_RESOURCE:
3588 /* The IBM lawyers misread another document! */
3589 case -NFS4ERR_DELAY:
2c643488 3590 case -EKEYEXPIRED:
51581f3b
TM		 3591 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3592 }
3593 } while (err == 0);
3594 return err;
3595}
3596
fe650407
TM		 3597struct nfs4_delegreturndata {
3598 struct nfs4_delegreturnargs args;
fa178f29 3599 struct nfs4_delegreturnres res;
fe650407
TM		 3600 struct nfs_fh fh;
3601 nfs4_stateid stateid;
26e976a8 3602 unsigned long timestamp;
fa178f29 3603 struct nfs_fattr fattr;
fe650407
TM		 3604 int rpc_status;
3605};
3606
fe650407
TM		 3607static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3608{
3609 struct nfs4_delegreturndata *data = calldata;
938e1010 3610
d61e612a
TM		 3611 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3612 task->tk_status);
938e1010 3613
79708861
RL		 3614 switch (task->tk_status) {
3615 case -NFS4ERR_STALE_STATEID:
3616 case -NFS4ERR_EXPIRED:
3617 case 0:
fa178f29 3618 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3619 break;
3620 default:
3621 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3622 -EAGAIN) {
3623 nfs_restart_rpc(task, data->res.server->nfs_client);
3624 return;
3625 }
3626 }
3627 data->rpc_status = task->tk_status;
fe650407
TM		 3628}
3629
3630static void nfs4_delegreturn_release(void *calldata)
3631{
fe650407
TM		 3632 kfree(calldata);
3633}
3634
938e1010
AA		 3635#if defined(CONFIG_NFS_V4_1)
3636static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3637{
3638 struct nfs4_delegreturndata *d_data;
3639
3640 d_data = (struct nfs4_delegreturndata *)data;
3641
3642 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3643 &d_data->args.seq_args,
3644 &d_data->res.seq_res, 1, task))
3645 return;
3646 rpc_call_start(task);
3647}
3648#endif /* CONFIG_NFS_V4_1 */
3649
c8d149f3 3650static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3651#if defined(CONFIG_NFS_V4_1)
3652 .rpc_call_prepare = nfs4_delegreturn_prepare,
3653#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3654 .rpc_call_done = nfs4_delegreturn_done,
3655 .rpc_release = nfs4_delegreturn_release,
3656};
3657
e6f81075 3658static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3659{
3660 struct nfs4_delegreturndata *data;
fa178f29 3661 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3662 struct rpc_task *task;
5138fde0
TM		 3663 struct rpc_message msg = {
3664 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3665 .rpc_cred = cred,
3666 };
c970aa85
TM		 3667 struct rpc_task_setup task_setup_data = {
3668 .rpc_client = server->client,
5138fde0 3669 .rpc_message = &msg,
c970aa85
TM		 3670 .callback_ops = &nfs4_delegreturn_ops,
3671 .flags = RPC_TASK_ASYNC,
3672 };
e6f81075 3673 int status = 0;
fe650407 3674
938e1010 3675 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3676 if (data == NULL)
3677 return -ENOMEM;
3678 data->args.fhandle = &data->fh;
3679 data->args.stateid = &data->stateid;
fa178f29 3680 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3681 nfs_copy_fh(&data->fh, NFS_FH(inode));
3682 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3683 data->res.fattr = &data->fattr;
3684 data->res.server = server;
5f7dbd5c 3685 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3686 nfs_fattr_init(data->res.fattr);
26e976a8 3687 data->timestamp = jiffies;
fe650407
TM		 3688 data->rpc_status = 0;
3689
c970aa85 3690 task_setup_data.callback_data = data;
5138fde0
TM		 3691 msg.rpc_argp = &data->args,
3692 msg.rpc_resp = &data->res,
c970aa85 3693 task = rpc_run_task(&task_setup_data);
7a1218a2 3694 if (IS_ERR(task))
fe650407 3695 return PTR_ERR(task);
e6f81075
TM		 3696 if (!issync)
3697 goto out;
fe650407 3698 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3699 if (status != 0)
3700 goto out;
3701 status = data->rpc_status;
3702 if (status != 0)
3703 goto out;
3704 nfs_refresh_inode(inode, &data->fattr);
3705out:
e6b3c4db 3706 rpc_put_task(task);
fe650407 3707 return status;
1da177e4
LT		 3708}
3709
e6f81075 3710int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3711{
3712 struct nfs_server *server = NFS_SERVER(inode);
3713 struct nfs4_exception exception = { };
3714 int err;
3715 do {
e6f81075 3716 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3717 switch (err) {
3718 case -NFS4ERR_STALE_STATEID:
3719 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3720 case 0:
3721 return 0;
3722 }
3723 err = nfs4_handle_exception(server, err, &exception);
3724 } while (exception.retry);
3725 return err;
3726}
3727
3728#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3729#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3730
3731/*
3732 * sleep, with exponential backoff, and retry the LOCK operation.
3733 */
3734static unsigned long
3735nfs4_set_lock_task_retry(unsigned long timeout)
3736{
150030b7 3737 schedule_timeout_killable(timeout);
1da177e4
LT		 3738 timeout <<= 1;
3739 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3740 return NFS4_LOCK_MAXTIMEOUT;
3741 return timeout;
3742}
3743
1da177e4
LT		 3744static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3745{
3746 struct inode *inode = state->inode;
3747 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3748 struct nfs_client *clp = server->nfs_client;
911d1aaf 3749 struct nfs_lockt_args arg = {
1da177e4 3750 .fh = NFS_FH(inode),
911d1aaf 3751 .fl = request,
1da177e4 3752 };
911d1aaf
TM		 3753 struct nfs_lockt_res res = {
3754 .denied = request,
1da177e4
LT		 3755 };
3756 struct rpc_message msg = {
3757 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3758 .rpc_argp = &arg,
3759 .rpc_resp = &res,
3760 .rpc_cred = state->owner->so_cred,
3761 };
1da177e4
LT		 3762 struct nfs4_lock_state *lsp;
3763 int status;
3764
911d1aaf 3765 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3766 status = nfs4_set_lock_state(state, request);
3767 if (status != 0)
3768 goto out;
3769 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3770 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3771 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3772 switch (status) {
3773 case 0:
3774 request->fl_type = F_UNLCK;
3775 break;
3776 case -NFS4ERR_DENIED:
3777 status = 0;
1da177e4 3778 }
70cc6487 3779 request->fl_ops->fl_release_private(request);
8d0a8a9d 3780out:
1da177e4
LT		 3781 return status;
3782}
3783
3784static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3785{
3786 struct nfs4_exception exception = { };
3787 int err;
3788
3789 do {
3790 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3791 _nfs4_proc_getlk(state, cmd, request),
3792 &exception);
3793 } while (exception.retry);
3794 return err;
3795}
3796
3797static int do_vfs_lock(struct file *file, struct file_lock *fl)
3798{
3799 int res = 0;
3800 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3801 case FL_POSIX:
3802 res = posix_lock_file_wait(file, fl);
3803 break;
3804 case FL_FLOCK:
3805 res = flock_lock_file_wait(file, fl);
3806 break;
3807 default:
3808 BUG();
3809 }
1da177e4
LT		 3810 return res;
3811}
3812
faf5f49c 3813struct nfs4_unlockdata {
911d1aaf
TM		 3814 struct nfs_locku_args arg;
3815 struct nfs_locku_res res;
faf5f49c
TM		 3816 struct nfs4_lock_state *lsp;
3817 struct nfs_open_context *ctx;
911d1aaf
TM		 3818 struct file_lock fl;
3819 const struct nfs_server *server;
26e976a8 3820 unsigned long timestamp;
faf5f49c
TM		 3821};
3822
911d1aaf
TM		 3823static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3824 struct nfs_open_context *ctx,
3825 struct nfs4_lock_state *lsp,
3826 struct nfs_seqid *seqid)
3827{
3828 struct nfs4_unlockdata *p;
3829 struct inode *inode = lsp->ls_state->inode;
3830
a893693c 3831 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3832 if (p == NULL)
3833 return NULL;
3834 p->arg.fh = NFS_FH(inode);
3835 p->arg.fl = &p->fl;
3836 p->arg.seqid = seqid;
c1d51931 3837 p->res.seqid = seqid;
5f7dbd5c 3838 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3839 p->arg.stateid = &lsp->ls_stateid;
3840 p->lsp = lsp;
3841 atomic_inc(&lsp->ls_count);
3842 /* Ensure we don't close file until we're done freeing locks! */
3843 p->ctx = get_nfs_open_context(ctx);
3844 memcpy(&p->fl, fl, sizeof(p->fl));
3845 p->server = NFS_SERVER(inode);
3846 return p;
3847}
3848
06f814a3 3849static void nfs4_locku_release_calldata(void *data)
faf5f49c 3850{
963d8fe5 3851 struct nfs4_unlockdata *calldata = data;
911d1aaf 3852 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3853 nfs4_put_lock_state(calldata->lsp);
3854 put_nfs_open_context(calldata->ctx);
3855 kfree(calldata);
faf5f49c
TM		 3856}
3857
963d8fe5 3858static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3859{
963d8fe5 3860 struct nfs4_unlockdata *calldata = data;
faf5f49c 3861
a893693c
AA		 3862 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3863 task->tk_status);
06f814a3
TM		 3864 if (RPC_ASSASSINATED(task))
3865 return;
faf5f49c
TM		 3866 switch (task->tk_status) {
3867 case 0:
3868 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3869 calldata->res.stateid.data,
faf5f49c 3870 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3871 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3872 break;
9e33bed5
TM		 3873 case -NFS4ERR_BAD_STATEID:
3874 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3875 case -NFS4ERR_STALE_STATEID:
3876 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3877 break;
3878 default:
9e33bed5 3879 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3880 nfs_restart_rpc(task,
d61e612a 3881 calldata->server->nfs_client);
faf5f49c 3882 }
faf5f49c
TM		 3883}
3884
4ce70ada 3885static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3886{
4ce70ada 3887 struct nfs4_unlockdata *calldata = data;
faf5f49c 3888
911d1aaf 3889 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3890 return;
3891 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3892 /* Note: exit _without_ running nfs4_locku_done */
3893 task->tk_action = NULL;
faf5f49c
TM		 3894 return;
3895 }
26e976a8 3896 calldata->timestamp = jiffies;
a893693c
AA		 3897 if (nfs4_setup_sequence(calldata->server->nfs_client,
3898 &calldata->arg.seq_args,
3899 &calldata->res.seq_res, 1, task))
3900 return;
5138fde0 3901 rpc_call_start(task);
faf5f49c
TM		 3902}
3903
963d8fe5 3904static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3905 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3906 .rpc_call_done = nfs4_locku_done,
06f814a3 3907 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3908};
3909
a5d16a4d
TM		 3910static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3911 struct nfs_open_context *ctx,
3912 struct nfs4_lock_state *lsp,
3913 struct nfs_seqid *seqid)
3914{
3915 struct nfs4_unlockdata *data;
5138fde0
TM		 3916 struct rpc_message msg = {
3917 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3918 .rpc_cred = ctx->cred,
3919 };
c970aa85
TM		 3920 struct rpc_task_setup task_setup_data = {
3921 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3922 .rpc_message = &msg,
c970aa85 3923 .callback_ops = &nfs4_locku_ops,
101070ca 3924 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3925 .flags = RPC_TASK_ASYNC,
3926 };
a5d16a4d 3927
137d6aca
FF		 3928 /* Ensure this is an unlock - when canceling a lock, the
3929 * canceled lock is passed in, and it won't be an unlock.
3930 */
3931 fl->fl_type = F_UNLCK;
3932
a5d16a4d
TM		 3933 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3934 if (data == NULL) {
3935 nfs_free_seqid(seqid);
3936 return ERR_PTR(-ENOMEM);
3937 }
3938
5138fde0
TM		 3939 msg.rpc_argp = &data->arg,
3940 msg.rpc_resp = &data->res,
c970aa85
TM		 3941 task_setup_data.callback_data = data;
3942 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3943}
3944
faf5f49c
TM		 3945static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3946{
19e03c57 3947 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3948 struct nfs_seqid *seqid;
1da177e4 3949 struct nfs4_lock_state *lsp;
06f814a3
TM		 3950 struct rpc_task *task;
3951 int status = 0;
536ff0f8 3952 unsigned char fl_flags = request->fl_flags;
faf5f49c 3953
8d0a8a9d 3954 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3955 /* Unlock _before_ we do the RPC call */
3956 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3957 down_read(&nfsi->rwsem);
3958 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3959 up_read(&nfsi->rwsem);
9b073574 3960 goto out;
19e03c57
TM		 3961 }
3962 up_read(&nfsi->rwsem);
8d0a8a9d 3963 if (status != 0)
9b073574
TM		 3964 goto out;
3965 /* Is this a delegated lock? */
3966 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3967 goto out;
8d0a8a9d 3968 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3969 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3970 status = -ENOMEM;
911d1aaf 3971 if (seqid == NULL)
9b073574 3972 goto out;
cd3758e3 3973 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3974 status = PTR_ERR(task);
3975 if (IS_ERR(task))
9b073574 3976 goto out;
a5d16a4d 3977 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3978 rpc_put_task(task);
9b073574 3979out:
536ff0f8 3980 request->fl_flags = fl_flags;
1da177e4
LT		 3981 return status;
3982}
3983
a5d16a4d
TM		 3984struct nfs4_lockdata {
3985 struct nfs_lock_args arg;
3986 struct nfs_lock_res res;
3987 struct nfs4_lock_state *lsp;
3988 struct nfs_open_context *ctx;
3989 struct file_lock fl;
26e976a8 3990 unsigned long timestamp;
a5d16a4d
TM		 3991 int rpc_status;
3992 int cancelled;
66179efe 3993 struct nfs_server *server;
a5d16a4d
TM		 3994};
3995
3996static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3997 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3998{
a5d16a4d
TM		 3999 struct nfs4_lockdata *p;
4000 struct inode *inode = lsp->ls_state->inode;
1da177e4 4001 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 4002
4003 p = kzalloc(sizeof(*p), GFP_KERNEL);
4004 if (p == NULL)
4005 return NULL;
4006
4007 p->arg.fh = NFS_FH(inode);
4008 p->arg.fl = &p->fl;
2f74c0a0
TM		 4009 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
4010 if (p->arg.open_seqid == NULL)
4011 goto out_free;
a5d16a4d
TM		 4012 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
4013 if (p->arg.lock_seqid == NULL)
2f74c0a0 4014 goto out_free_seqid;
a5d16a4d 4015 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4016 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4017 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 4018 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 4019 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 4020 p->lsp = lsp;
66179efe 4021 p->server = server;
a5d16a4d
TM		 4022 atomic_inc(&lsp->ls_count);
4023 p->ctx = get_nfs_open_context(ctx);
4024 memcpy(&p->fl, fl, sizeof(p->fl));
4025 return p;
2f74c0a0
TM		 4026out_free_seqid:
4027 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4028out_free:
4029 kfree(p);
4030 return NULL;
4031}
4032
4033static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4034{
4035 struct nfs4_lockdata *data = calldata;
4036 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4037
3110ff80 4038 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4039 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4040 return;
a5d16a4d
TM		 4041 /* Do we need to do an open_to_lock_owner? */
4042 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4043 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4044 return;
a5d16a4d
TM		 4045 data->arg.open_stateid = &state->stateid;
4046 data->arg.new_lock_owner = 1;
c1d51931 4047 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4048 } else
4049 data->arg.new_lock_owner = 0;
26e976a8 4050 data->timestamp = jiffies;
66179efe
AA		 4051 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
4052 &data->res.seq_res, 1, task))
4053 return;
5138fde0 4054 rpc_call_start(task);
3110ff80 4055 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4056}
4057
b257957e
AB		 4058static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4059{
4060 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4061 nfs4_lock_prepare(task, calldata);
4062}
4063
a5d16a4d
TM		 4064static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4065{
4066 struct nfs4_lockdata *data = calldata;
4067
3110ff80 4068 dprintk("%s: begin!\n", __func__);
a5d16a4d 4069
d61e612a
TM		 4070 nfs4_sequence_done(data->server, &data->res.seq_res,
4071 task->tk_status);
66179efe 4072
a5d16a4d
TM		 4073 data->rpc_status = task->tk_status;
4074 if (RPC_ASSASSINATED(task))
4075 goto out;
4076 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4077 if (data->rpc_status == 0)
4078 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4079 else
4080 goto out;
4081 }
4082 if (data->rpc_status == 0) {
4083 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4084 sizeof(data->lsp->ls_stateid.data));
4085 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4086 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4087 }
a5d16a4d 4088out:
3110ff80 4089 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4090}
4091
4092static void nfs4_lock_release(void *calldata)
4093{
4094 struct nfs4_lockdata *data = calldata;
4095
3110ff80 4096 dprintk("%s: begin!\n", __func__);
2f74c0a0 4097 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4098 if (data->cancelled != 0) {
4099 struct rpc_task *task;
4100 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4101 data->arg.lock_seqid);
4102 if (!IS_ERR(task))
e6b3c4db 4103 rpc_put_task(task);
3110ff80 4104 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4105 } else
4106 nfs_free_seqid(data->arg.lock_seqid);
4107 nfs4_put_lock_state(data->lsp);
4108 put_nfs_open_context(data->ctx);
4109 kfree(data);
3110ff80 4110 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4111}
4112
4113static const struct rpc_call_ops nfs4_lock_ops = {
4114 .rpc_call_prepare = nfs4_lock_prepare,
4115 .rpc_call_done = nfs4_lock_done,
4116 .rpc_release = nfs4_lock_release,
4117};
4118
b257957e
AB		 4119static const struct rpc_call_ops nfs4_recover_lock_ops = {
4120 .rpc_call_prepare = nfs4_recover_lock_prepare,
4121 .rpc_call_done = nfs4_lock_done,
4122 .rpc_release = nfs4_lock_release,
4123};
4124
2bee72a6
TM		 4125static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4126{
4127 struct nfs_client *clp = server->nfs_client;
4128 struct nfs4_state *state = lsp->ls_state;
4129
4130 switch (error) {
4131 case -NFS4ERR_ADMIN_REVOKED:
4132 case -NFS4ERR_BAD_STATEID:
4133 case -NFS4ERR_EXPIRED:
4134 if (new_lock_owner != 0 ||
4135 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4136 nfs4_state_mark_reclaim_nograce(clp, state);
4137 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4138 break;
4139 case -NFS4ERR_STALE_STATEID:
4140 if (new_lock_owner != 0 ||
4141 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4142 nfs4_state_mark_reclaim_reboot(clp, state);
4143 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4144 };
4145}
4146
afe6c27c 4147static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4148{
4149 struct nfs4_lockdata *data;
4150 struct rpc_task *task;
5138fde0
TM		 4151 struct rpc_message msg = {
4152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4153 .rpc_cred = state->owner->so_cred,
4154 };
c970aa85
TM		 4155 struct rpc_task_setup task_setup_data = {
4156 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4157 .rpc_message = &msg,
c970aa85 4158 .callback_ops = &nfs4_lock_ops,
101070ca 4159 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4160 .flags = RPC_TASK_ASYNC,
4161 };
a5d16a4d
TM		 4162 int ret;
4163
3110ff80 4164 dprintk("%s: begin!\n", __func__);
cd3758e3 4165 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 4166 fl->fl_u.nfs4_fl.owner);
4167 if (data == NULL)
4168 return -ENOMEM;
4169 if (IS_SETLKW(cmd))
4170 data->arg.block = 1;
b257957e
AB		 4171 if (recovery_type > NFS_LOCK_NEW) {
4172 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4173 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4174 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4175 }
5138fde0
TM		 4176 msg.rpc_argp = &data->arg,
4177 msg.rpc_resp = &data->res,
c970aa85
TM		 4178 task_setup_data.callback_data = data;
4179 task = rpc_run_task(&task_setup_data);
7a1218a2 4180 if (IS_ERR(task))
a5d16a4d 4181 return PTR_ERR(task);
a5d16a4d
TM		 4182 ret = nfs4_wait_for_completion_rpc_task(task);
4183 if (ret == 0) {
4184 ret = data->rpc_status;
2bee72a6
TM		 4185 if (ret)
4186 nfs4_handle_setlk_error(data->server, data->lsp,
4187 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4188 } else
4189 data->cancelled = 1;
e6b3c4db 4190 rpc_put_task(task);
3110ff80 4191 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4192 return ret;
1da177e4
LT		 4193}
4194
4195static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4196{
202b50dc
TM		 4197 struct nfs_server *server = NFS_SERVER(state->inode);
4198 struct nfs4_exception exception = { };
4199 int err;
4200
4201 do {
42a2d13e
TM		 4202 /* Cache the lock if possible... */
4203 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4204 return 0;
afe6c27c 4205 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4206 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4207 break;
4208 nfs4_handle_exception(server, err, &exception);
4209 } while (exception.retry);
4210 return err;
1da177e4
LT		 4211}
4212
4213static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4214{
202b50dc
TM		 4215 struct nfs_server *server = NFS_SERVER(state->inode);
4216 struct nfs4_exception exception = { };
4217 int err;
4218
6bfc93ef
TM		 4219 err = nfs4_set_lock_state(state, request);
4220 if (err != 0)
4221 return err;
202b50dc 4222 do {
42a2d13e
TM		 4223 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4224 return 0;
afe6c27c 4225 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4226 switch (err) {
4227 default:
4228 goto out;
4229 case -NFS4ERR_GRACE:
4230 case -NFS4ERR_DELAY:
2c643488 4231 case -EKEYEXPIRED:
a9ed2e25
TM		 4232 nfs4_handle_exception(server, err, &exception);
4233 err = 0;
4234 }
202b50dc 4235 } while (exception.retry);
a9ed2e25 4236out:
202b50dc 4237 return err;
1da177e4
LT		 4238}
4239
4240static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4241{
19e03c57 4242 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4243 unsigned char fl_flags = request->fl_flags;
8e469ebd 4244 int status = -ENOLCK;
1da177e4 4245
8e469ebd
TM		 4246 if ((fl_flags & FL_POSIX) &&
4247 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4248 goto out;
6bfc93ef 4249 /* Is this a delegated open? */
6bfc93ef
TM		 4250 status = nfs4_set_lock_state(state, request);
4251 if (status != 0)
4252 goto out;
01c3b861
TM		 4253 request->fl_flags |= FL_ACCESS;
4254 status = do_vfs_lock(request->fl_file, request);
4255 if (status < 0)
4256 goto out;
19e03c57 4257 down_read(&nfsi->rwsem);
01c3b861 4258 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4259 /* Yes: cache locks! */
01c3b861 4260 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4261 request->fl_flags = fl_flags & ~FL_SLEEP;
4262 status = do_vfs_lock(request->fl_file, request);
4263 goto out_unlock;
01c3b861 4264 }
afe6c27c 4265 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4266 if (status != 0)
01c3b861 4267 goto out_unlock;
6bfc93ef 4268 /* Note: we always want to sleep here! */
01c3b861 4269 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4270 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4271 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4272out_unlock:
19e03c57 4273 up_read(&nfsi->rwsem);
01c3b861
TM		 4274out:
4275 request->fl_flags = fl_flags;
1da177e4
LT		 4276 return status;
4277}
4278
4279static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4280{
4281 struct nfs4_exception exception = { };
4282 int err;
4283
4284 do {
965b5d67
TM		 4285 err = _nfs4_proc_setlk(state, cmd, request);
4286 if (err == -NFS4ERR_DENIED)
4287 err = -EAGAIN;
1da177e4 4288 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4289 err, &exception);
1da177e4
LT		 4290 } while (exception.retry);
4291 return err;
4292}
4293
4294static int
4295nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4296{
4297 struct nfs_open_context *ctx;
4298 struct nfs4_state *state;
4299 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4300 int status;
4301
4302 /* verify open state */
cd3758e3 4303 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4304 state = ctx->state;
4305
4306 if (request->fl_start < 0 || request->fl_end < 0)
4307 return -EINVAL;
4308
d953126a
TM		 4309 if (IS_GETLK(cmd)) {
4310 if (state != NULL)
4311 return nfs4_proc_getlk(state, F_GETLK, request);
4312 return 0;
4313 }
1da177e4
LT		 4314
4315 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4316 return -EINVAL;
4317
d953126a
TM		 4318 if (request->fl_type == F_UNLCK) {
4319 if (state != NULL)
4320 return nfs4_proc_unlck(state, cmd, request);
4321 return 0;
4322 }
1da177e4 4323
d953126a
TM		 4324 if (state == NULL)
4325 return -ENOLCK;
1da177e4
LT		 4326 do {
4327 status = nfs4_proc_setlk(state, cmd, request);
4328 if ((status != -EAGAIN) || IS_SETLK(cmd))
4329 break;
4330 timeout = nfs4_set_lock_task_retry(timeout);
4331 status = -ERESTARTSYS;
4332 if (signalled())
4333 break;
4334 } while(status < 0);
1da177e4
LT		 4335 return status;
4336}
4337
888e694c
TM		 4338int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4339{
4340 struct nfs_server *server = NFS_SERVER(state->inode);
4341 struct nfs4_exception exception = { };
4342 int err;
4343
4344 err = nfs4_set_lock_state(state, fl);
4345 if (err != 0)
4346 goto out;
4347 do {
afe6c27c 4348 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4349 switch (err) {
4350 default:
4351 printk(KERN_ERR "%s: unhandled error %d.\n",
4352 __func__, err);
4353 case 0:
965b5d67 4354 case -ESTALE:
d5122201
TM		 4355 goto out;
4356 case -NFS4ERR_EXPIRED:
4357 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4358 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4359 case -NFS4ERR_BADSESSION:
4360 case -NFS4ERR_BADSLOT:
4361 case -NFS4ERR_BAD_HIGH_SLOT:
4362 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4363 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4364 nfs4_schedule_state_recovery(server->nfs_client);
4365 goto out;
965b5d67
TM		 4366 case -ERESTARTSYS:
4367 /*
4368 * The show must go on: exit, but mark the
4369 * stateid as needing recovery.
4370 */
4371 case -NFS4ERR_ADMIN_REVOKED:
4372 case -NFS4ERR_BAD_STATEID:
4373 case -NFS4ERR_OPENMODE:
4374 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4375 err = 0;
4376 goto out;
4377 case -ENOMEM:
4378 case -NFS4ERR_DENIED:
4379 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4380 err = 0;
4381 goto out;
d5122201 4382 case -NFS4ERR_DELAY:
2c643488 4383 case -EKEYEXPIRED:
d5122201
TM		 4384 break;
4385 }
888e694c
TM		 4386 err = nfs4_handle_exception(server, err, &exception);
4387 } while (exception.retry);
4388out:
4389 return err;
4390}
6b3b5496 4391
aa1870af
BF		 4392#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4393
6b3b5496
BF		 4394int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4395 size_t buflen, int flags)
4396{
4b580ee3
BF		 4397 struct inode *inode = dentry->d_inode;
4398
4399 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4400 return -EOPNOTSUPP;
4401
4b580ee3 4402 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4403}
4404
4405/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4406 * and that's what we'll do for e.g. user attributes that haven't been set.
4407 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4408 * attributes in kernel-managed attribute namespaces. */
4409ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4410 size_t buflen)
4411{
aa1870af
BF		 4412 struct inode *inode = dentry->d_inode;
4413
4414 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4415 return -EOPNOTSUPP;
4416
4417 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4418}
4419
4420ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4421{
aa1870af 4422 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4423
096455a2
BF		 4424 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4425 return 0;
6b3b5496
BF		 4426 if (buf && buflen < len)
4427 return -ERANGE;
4428 if (buf)
aa1870af
BF		 4429 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4430 return len;
6b3b5496
BF		 4431}
4432
69aaaae1
TM		 4433static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4434{
4435 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4436 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4437 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4438 return;
4439
4440 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4441 NFS_ATTR_FATTR_NLINK;
4442 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4443 fattr->nlink = 2;
4444}
4445
56659e99 4446int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4447 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4448{
4449 struct nfs_server *server = NFS_SERVER(dir);
4450 u32 bitmask[2] = {
361e624f
MN		 4451 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4452 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4453 };
4454 struct nfs4_fs_locations_arg args = {
4455 .dir_fh = NFS_FH(dir),
c228fd3a 4456 .name = name,
683b57b4
TM		 4457 .page = page,
4458 .bitmask = bitmask,
4459 };
22958463
BH		 4460 struct nfs4_fs_locations_res res = {
4461 .fs_locations = fs_locations,
4462 };
683b57b4
TM		 4463 struct rpc_message msg = {
4464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4465 .rpc_argp = &args,
22958463 4466 .rpc_resp = &res,
683b57b4
TM		 4467 };
4468 int status;
4469
3110ff80 4470 dprintk("%s: start\n", __func__);
c228fd3a 4471 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4472 fs_locations->server = server;
830b8e33 4473 fs_locations->nlocations = 0;
cccef3b9 4474 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4475 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4476 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4477 return status;
4478}
4479
557134a3 4480#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4481/*
4482 * nfs4_proc_exchange_id()
4483 *
4484 * Since the clientid has expired, all compounds using sessions
4485 * associated with the stale clientid will be returning
4486 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4487 * be in some phase of session reset.
4488 */
4d643d1d 4489int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4490{
4491 nfs4_verifier verifier;
4492 struct nfs41_exchange_id_args args = {
4493 .client = clp,
4494 .flags = clp->cl_exchange_flags,
4495 };
4496 struct nfs41_exchange_id_res res = {
4497 .client = clp,
4498 };
4499 int status;
4500 struct rpc_message msg = {
4501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4502 .rpc_argp = &args,
4503 .rpc_resp = &res,
4504 .rpc_cred = cred,
4505 };
4506 __be32 *p;
4507
4508 dprintk("--> %s\n", __func__);
4509 BUG_ON(clp == NULL);
a7b72103 4510
7b183d0d
AB		 4511 /* Remove server-only flags */
4512 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4513
99fe60d0
BH		 4514 p = (u32 *)verifier.data;
4515 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4516 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4517 args.verifier = &verifier;
4518
4519 while (1) {
4520 args.id_len = scnprintf(args.id, sizeof(args.id),
4521 "%s/%s %u",
4522 clp->cl_ipaddr,
4523 rpc_peeraddr2str(clp->cl_rpcclient,
4524 RPC_DISPLAY_ADDR),
4525 clp->cl_id_uniquifier);
4526
4527 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4528
180b62a3 4529 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4530 break;
4531
4532 if (signalled())
4533 break;
4534
4535 if (++clp->cl_id_uniquifier == 0)
4536 break;
4537 }
4538
4539 dprintk("<-- %s status= %d\n", __func__, status);
4540 return status;
4541}
4542
2050f0cc
AA		 4543struct nfs4_get_lease_time_data {
4544 struct nfs4_get_lease_time_args *args;
4545 struct nfs4_get_lease_time_res *res;
4546 struct nfs_client *clp;
4547};
4548
4549static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4550 void *calldata)
4551{
4552 int ret;
4553 struct nfs4_get_lease_time_data *data =
4554 (struct nfs4_get_lease_time_data *)calldata;
4555
4556 dprintk("--> %s\n", __func__);
689cf5c1 4557 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4558 /* just setup sequence, do not trigger session recovery
4559 since we're invoked within one */
4560 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4561 &data->args->la_seq_args,
4562 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4563
4564 BUG_ON(ret == -EAGAIN);
4565 rpc_call_start(task);
4566 dprintk("<-- %s\n", __func__);
4567}
4568
4569/*
4570 * Called from nfs4_state_manager thread for session setup, so don't recover
4571 * from sequence operation or clientid errors.
4572 */
4573static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4574{
4575 struct nfs4_get_lease_time_data *data =
4576 (struct nfs4_get_lease_time_data *)calldata;
4577
4578 dprintk("--> %s\n", __func__);
4579 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4580 switch (task->tk_status) {
4581 case -NFS4ERR_DELAY:
4582 case -NFS4ERR_GRACE:
2c643488 4583 case -EKEYEXPIRED:
2050f0cc
AA		 4584 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4585 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4586 task->tk_status = 0;
0110ee15 4587 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4588 return;
4589 }
2050f0cc
AA		 4590 dprintk("<-- %s\n", __func__);
4591}
4592
4593struct rpc_call_ops nfs4_get_lease_time_ops = {
4594 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4595 .rpc_call_done = nfs4_get_lease_time_done,
4596};
4597
4598int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4599{
4600 struct rpc_task *task;
4601 struct nfs4_get_lease_time_args args;
4602 struct nfs4_get_lease_time_res res = {
4603 .lr_fsinfo = fsinfo,
4604 };
4605 struct nfs4_get_lease_time_data data = {
4606 .args = &args,
4607 .res = &res,
4608 .clp = clp,
4609 };
4610 struct rpc_message msg = {
4611 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4612 .rpc_argp = &args,
4613 .rpc_resp = &res,
4614 };
4615 struct rpc_task_setup task_setup = {
4616 .rpc_client = clp->cl_rpcclient,
4617 .rpc_message = &msg,
4618 .callback_ops = &nfs4_get_lease_time_ops,
4619 .callback_data = &data
4620 };
4621 int status;
4622
4623 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4624 dprintk("--> %s\n", __func__);
4625 task = rpc_run_task(&task_setup);
4626
4627 if (IS_ERR(task))
4628 status = PTR_ERR(task);
4629 else {
4630 status = task->tk_status;
4631 rpc_put_task(task);
4632 }
4633 dprintk("<-- %s return %d\n", __func__, status);
4634
4635 return status;
4636}
4637
b73dafa7
RL		 4638/*
4639 * Reset a slot table
4640 */
104aeba4
AA		 4641static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4642 int ivalue)
ac72b7b3 4643{
104aeba4 4644 struct nfs4_slot *new = NULL;
b73dafa7 4645 int i;
ac72b7b3
AA		 4646 int ret = 0;
4647
104aeba4
AA		 4648 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4649 max_reqs, tbl->max_slots);
ac72b7b3 4650
104aeba4
AA		 4651 /* Does the newly negotiated max_reqs match the existing slot table? */
4652 if (max_reqs != tbl->max_slots) {
4653 ret = -ENOMEM;
4654 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4655 GFP_KERNEL);
4656 if (!new)
4657 goto out;
4658 ret = 0;
4659 kfree(tbl->slots);
ac72b7b3
AA		 4660 }
4661 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4662 if (new) {
4663 tbl->slots = new;
4664 tbl->max_slots = max_reqs;
4665 }
4666 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4667 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4668 spin_unlock(&tbl->slot_tbl_lock);
4669 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4670 tbl, tbl->slots, tbl->max_slots);
4671out:
4672 dprintk("<-- %s: return %d\n", __func__, ret);
4673 return ret;
4674}
4675
b73dafa7
RL		 4676/*
4677 * Reset the forechannel and backchannel slot tables
4678 */
4679static int nfs4_reset_slot_tables(struct nfs4_session *session)
4680{
4681 int status;
4682
4683 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4684 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4685 if (status)
4686 return status;
4687
4688 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4689 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4690 return status;
4691}
4692
f8625a6a
RL		 4693/* Destroy the slot table */
4694static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4695{
4696 if (session->fc_slot_table.slots != NULL) {
4697 kfree(session->fc_slot_table.slots);
4698 session->fc_slot_table.slots = NULL;
4699 }
4700 if (session->bc_slot_table.slots != NULL) {
4701 kfree(session->bc_slot_table.slots);
4702 session->bc_slot_table.slots = NULL;
4703 }
4704 return;
4705}
4706
fc931582
AA		 4707/*
4708 * Initialize slot table
4709 */
050047ce
RL		 4710static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4711 int max_slots, int ivalue)
fc931582 4712{
fc931582
AA		 4713 struct nfs4_slot *slot;
4714 int ret = -ENOMEM;
4715
4716 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4717
050047ce 4718 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4719
4720 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4721 if (!slot)
4722 goto out;
fc931582
AA		 4723 ret = 0;
4724
4725 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4726 tbl->max_slots = max_slots;
4727 tbl->slots = slot;
4728 tbl->highest_used_slotid = -1; /* no slot is currently used */
4729 spin_unlock(&tbl->slot_tbl_lock);
4730 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4731 tbl, tbl->slots, tbl->max_slots);
4732out:
4733 dprintk("<-- %s: return %d\n", __func__, ret);
4734 return ret;
fc931582
AA		 4735}
4736
050047ce
RL		 4737/*
4738 * Initialize the forechannel and backchannel tables
4739 */
4740static int nfs4_init_slot_tables(struct nfs4_session *session)
4741{
f26468fb
TM		 4742 struct nfs4_slot_table *tbl;
4743 int status = 0;
050047ce 4744
f26468fb
TM		 4745 tbl = &session->fc_slot_table;
4746 if (tbl->slots == NULL) {
4747 status = nfs4_init_slot_table(tbl,
4748 session->fc_attrs.max_reqs, 1);
4749 if (status)
4750 return status;
4751 }
050047ce 4752
f26468fb
TM		 4753 tbl = &session->bc_slot_table;
4754 if (tbl->slots == NULL) {
4755 status = nfs4_init_slot_table(tbl,
4756 session->bc_attrs.max_reqs, 0);
4757 if (status)
4758 nfs4_destroy_slot_tables(session);
4759 }
f8625a6a
RL		 4760
4761 return status;
557134a3
AA		 4762}
4763
4764struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4765{
4766 struct nfs4_session *session;
4767 struct nfs4_slot_table *tbl;
4768
4769 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4770 if (!session)
4771 return NULL;
76db6d95 4772
76db6d95
AA		 4773 /*
4774 * The create session reply races with the server back
4775 * channel probe. Mark the client NFS_CS_SESSION_INITING
4776 * so that the client back channel can find the
4777 * nfs_client struct
4778 */
4779 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4780 init_completion(&session->complete);
76db6d95 4781
557134a3 4782 tbl = &session->fc_slot_table;
9dfdf404 4783 tbl->highest_used_slotid = -1;
557134a3 4784 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4785 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4786
4787 tbl = &session->bc_slot_table;
9dfdf404 4788 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4789 spin_lock_init(&tbl->slot_tbl_lock);
4790 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4791
557134a3
AA		 4792 session->clp = clp;
4793 return session;
4794}
4795
4796void nfs4_destroy_session(struct nfs4_session *session)
4797{
5a0ffe54
AA		 4798 nfs4_proc_destroy_session(session);
4799 dprintk("%s Destroy backchannel for xprt %p\n",
4800 __func__, session->clp->cl_rpcclient->cl_xprt);
4801 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4802 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4803 nfs4_destroy_slot_tables(session);
557134a3
AA		 4804 kfree(session);
4805}
4806
fc931582
AA		 4807/*
4808 * Initialize the values to be used by the client in CREATE_SESSION
4809 * If nfs4_init_session set the fore channel request and response sizes,
4810 * use them.
4811 *
4812 * Set the back channel max_resp_sz_cached to zero to force the client to
4813 * always set csa_cachethis to FALSE because the current implementation
4814 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4815 */
4816static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4817{
4818 struct nfs4_session *session = args->client->cl_session;
4819 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4820 mxresp_sz = session->fc_attrs.max_resp_sz;
4821
4822 if (mxrqst_sz == 0)
4823 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4824 if (mxresp_sz == 0)
4825 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4826 /* Fore channel attributes */
4827 args->fc_attrs.headerpadsz = 0;
4828 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4829 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4830 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4831 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4832
4833 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4834 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4835 __func__,
4836 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4837 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4838
4839 /* Back channel attributes */
4840 args->bc_attrs.headerpadsz = 0;
4841 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4842 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4843 args->bc_attrs.max_resp_sz_cached = 0;
4844 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4845 args->bc_attrs.max_reqs = 1;
4846
4847 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4848 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4849 __func__,
4850 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4851 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4852 args->bc_attrs.max_reqs);
4853}
4854
8d35301d
AA		 4855static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4856{
4857 if (rcvd <= sent)
4858 return 0;
4859 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4860 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4861 return -EINVAL;
4862}
4863
4864#define _verify_fore_channel_attr(_name_) \
4865 _verify_channel_attr("fore", #_name_, \
4866 args->fc_attrs._name_, \
4867 session->fc_attrs._name_)
4868
4869#define _verify_back_channel_attr(_name_) \
4870 _verify_channel_attr("back", #_name_, \
4871 args->bc_attrs._name_, \
4872 session->bc_attrs._name_)
4873
4874/*
4875 * The server is not allowed to increase the fore channel header pad size,
4876 * maximum response size, or maximum number of operations.
4877 *
4878 * The back channel attributes are only negotiatied down: We send what the
4879 * (back channel) server insists upon.
4880 */
4881static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4882 struct nfs4_session *session)
4883{
4884 int ret = 0;
4885
4886 ret |= _verify_fore_channel_attr(headerpadsz);
4887 ret |= _verify_fore_channel_attr(max_resp_sz);
4888 ret |= _verify_fore_channel_attr(max_ops);
4889
4890 ret |= _verify_back_channel_attr(headerpadsz);
4891 ret |= _verify_back_channel_attr(max_rqst_sz);
4892 ret |= _verify_back_channel_attr(max_resp_sz);
4893 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4894 ret |= _verify_back_channel_attr(max_ops);
4895 ret |= _verify_back_channel_attr(max_reqs);
4896
4897 return ret;
4898}
4899
fc931582
AA		 4900static int _nfs4_proc_create_session(struct nfs_client *clp)
4901{
4902 struct nfs4_session *session = clp->cl_session;
4903 struct nfs41_create_session_args args = {
4904 .client = clp,
4905 .cb_program = NFS4_CALLBACK,
4906 };
4907 struct nfs41_create_session_res res = {
4908 .client = clp,
4909 };
4910 struct rpc_message msg = {
4911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4912 .rpc_argp = &args,
4913 .rpc_resp = &res,
4914 };
4915 int status;
4916
4917 nfs4_init_channel_attrs(&args);
0f91421e 4918 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4919
4920 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4921
8d35301d
AA		 4922 if (!status)
4923 /* Verify the session's negotiated channel_attrs values */
4924 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4925 if (!status) {
4926 /* Increment the clientid slot sequence id */
4927 clp->cl_seqid++;
4928 }
4929
4930 return status;
4931}
4932
4933/*
4934 * Issues a CREATE_SESSION operation to the server.
4935 * It is the responsibility of the caller to verify the session is
4936 * expired before calling this routine.
4937 */
f26468fb 4938int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4939{
4940 int status;
4941 unsigned *ptr;
fc931582
AA		 4942 struct nfs4_session *session = clp->cl_session;
4943
4944 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4945
4946 status = _nfs4_proc_create_session(clp);
4947 if (status)
4948 goto out;
4949
f26468fb
TM		 4950 /* Init and reset the fore channel */
4951 status = nfs4_init_slot_tables(session);
4952 dprintk("slot table initialization returned %d\n", status);
4953 if (status)
4954 goto out;
4955 status = nfs4_reset_slot_tables(session);
4956 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4957 if (status)
4958 goto out;
4959
4960 ptr = (unsigned *)&session->sess_id.data[0];
4961 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4962 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4963out:
4964 dprintk("<-- %s\n", __func__);
4965 return status;
4966}
4967
0f3e66c6
AA		 4968/*
4969 * Issue the over-the-wire RPC DESTROY_SESSION.
4970 * The caller must serialize access to this routine.
4971 */
4972int nfs4_proc_destroy_session(struct nfs4_session *session)
4973{
4974 int status = 0;
4975 struct rpc_message msg;
4976
4977 dprintk("--> nfs4_proc_destroy_session\n");
4978
4979 /* session is still being setup */
4980 if (session->clp->cl_cons_state != NFS_CS_READY)
4981 return status;
4982
4983 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4984 msg.rpc_argp = session;
4985 msg.rpc_resp = NULL;
4986 msg.rpc_cred = NULL;
4987 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4988
4989 if (status)
4990 printk(KERN_WARNING
4991 "Got error %d from the server on DESTROY_SESSION. "
4992 "Session has been destroyed regardless...\n", status);
4993
4994 dprintk("<-- nfs4_proc_destroy_session\n");
4995 return status;
4996}
4997
fccba804
TM		 4998int nfs4_init_session(struct nfs_server *server)
4999{
5000 struct nfs_client *clp = server->nfs_client;
2449ea2e 5001 struct nfs4_session *session;
68bf05ef 5002 unsigned int rsize, wsize;
fccba804
TM		 5003 int ret;
5004
5005 if (!nfs4_has_session(clp))
5006 return 0;
5007
68bf05ef
AA		 5008 rsize = server->rsize;
5009 if (rsize == 0)
5010 rsize = NFS_MAX_FILE_IO_SIZE;
5011 wsize = server->wsize;
5012 if (wsize == 0)
5013 wsize = NFS_MAX_FILE_IO_SIZE;
5014
2449ea2e 5015 session = clp->cl_session;
68bf05ef
AA		 5016 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5017 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5018
fccba804
TM		 5019 ret = nfs4_recover_expired_lease(server);
5020 if (!ret)
5021 ret = nfs4_check_client_ready(clp);
5022 return ret;
5023}
5024
fc01cea9
AA		 5025/*
5026 * Renew the cl_session lease.
5027 */
5028static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5029{
5030 struct nfs4_sequence_args args;
5031 struct nfs4_sequence_res res;
5032
5033 struct rpc_message msg = {
5034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5035 .rpc_argp = &args,
5036 .rpc_resp = &res,
5037 .rpc_cred = cred,
5038 };
5039
5040 args.sa_cache_this = 0;
5041
5042 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
b257957e 5043 &res, args.sa_cache_this, 1);
fc01cea9
AA		 5044}
5045
dc96aef9
AB		 5046static void nfs41_sequence_release(void *data)
5047{
5048 struct nfs_client *clp = (struct nfs_client *)data;
5049
7135840f
AB		 5050 if (atomic_read(&clp->cl_count) > 1)
5051 nfs4_schedule_state_renewal(clp);
5052 nfs_put_client(clp);
dc96aef9
AB		 5053}
5054
5055static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9
AA		 5056{
5057 struct nfs_client *clp = (struct nfs_client *)data;
5058
5059 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
5060
5061 if (task->tk_status < 0) {
5062 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5063 if (atomic_read(&clp->cl_count) == 1)
5064 goto out;
fc01cea9
AA		 5065
5066 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
5067 == -EAGAIN) {
0110ee15 5068 nfs_restart_rpc(task, clp);
fc01cea9
AA		 5069 return;
5070 }
5071 }
fc01cea9 5072 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5073out:
fc01cea9
AA		 5074 kfree(task->tk_msg.rpc_argp);
5075 kfree(task->tk_msg.rpc_resp);
5076
5077 dprintk("<-- %s\n", __func__);
5078}
5079
5080static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5081{
5082 struct nfs_client *clp;
5083 struct nfs4_sequence_args *args;
5084 struct nfs4_sequence_res *res;
5085
5086 clp = (struct nfs_client *)data;
5087 args = task->tk_msg.rpc_argp;
5088 res = task->tk_msg.rpc_resp;
5089
5090 if (nfs4_setup_sequence(clp, args, res, 0, task))
5091 return;
5092 rpc_call_start(task);
5093}
5094
5095static const struct rpc_call_ops nfs41_sequence_ops = {
5096 .rpc_call_done = nfs41_sequence_call_done,
5097 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5098 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5099};
5100
5101static int nfs41_proc_async_sequence(struct nfs_client *clp,
5102 struct rpc_cred *cred)
5103{
5104 struct nfs4_sequence_args *args;
5105 struct nfs4_sequence_res *res;
5106 struct rpc_message msg = {
5107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5108 .rpc_cred = cred,
5109 };
5110
7135840f
AB		 5111 if (!atomic_inc_not_zero(&clp->cl_count))
5112 return -EIO;
fc01cea9 5113 args = kzalloc(sizeof(*args), GFP_KERNEL);
fc01cea9 5114 res = kzalloc(sizeof(*res), GFP_KERNEL);
7135840f 5115 if (!args || !res) {
fc01cea9 5116 kfree(args);
7dd08a57 5117 kfree(res);
7135840f 5118 nfs_put_client(clp);
fc01cea9
AA		 5119 return -ENOMEM;
5120 }
5121 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
5122 msg.rpc_argp = args;
5123 msg.rpc_resp = res;
5124
5125 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
5126 &nfs41_sequence_ops, (void *)clp);
5127}
5128
fce5c838
RL		 5129struct nfs4_reclaim_complete_data {
5130 struct nfs_client *clp;
5131 struct nfs41_reclaim_complete_args arg;
5132 struct nfs41_reclaim_complete_res res;
5133};
5134
5135static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5136{
5137 struct nfs4_reclaim_complete_data *calldata = data;
5138
b257957e 5139 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
fce5c838
RL		 5140 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
5141 &calldata->res.seq_res, 0, task))
5142 return;
5143
5144 rpc_call_start(task);
5145}
5146
5147static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5148{
5149 struct nfs4_reclaim_complete_data *calldata = data;
5150 struct nfs_client *clp = calldata->clp;
5151 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5152
5153 dprintk("--> %s\n", __func__);
5154 nfs41_sequence_done(clp, res, task->tk_status);
5155 switch (task->tk_status) {
5156 case 0:
5157 case -NFS4ERR_COMPLETE_ALREADY:
5158 break;
5159 case -NFS4ERR_BADSESSION:
5160 case -NFS4ERR_DEADSESSION:
5161 /*
5162 * Handle the session error, but do not retry the operation, as
5163 * we have no way of telling whether the clientid had to be
5164 * reset before we got our reply. If reset, a new wave of
5165 * reclaim operations will follow, containing their own reclaim
5166 * complete. We don't want our retry to get on the way of
5167 * recovery by incorrectly indicating to the server that we're
5168 * done reclaiming state since the process had to be restarted.
5169 */
5170 _nfs4_async_handle_error(task, NULL, clp, NULL);
5171 break;
5172 default:
5173 if (_nfs4_async_handle_error(
5174 task, NULL, clp, NULL) == -EAGAIN) {
5175 rpc_restart_call_prepare(task);
5176 return;
5177 }
5178 }
fce5c838
RL		 5179
5180 dprintk("<-- %s\n", __func__);
5181}
5182
5183static void nfs4_free_reclaim_complete_data(void *data)
5184{
5185 struct nfs4_reclaim_complete_data *calldata = data;
5186
5187 kfree(calldata);
5188}
5189
5190static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5191 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5192 .rpc_call_done = nfs4_reclaim_complete_done,
5193 .rpc_release = nfs4_free_reclaim_complete_data,
5194};
5195
5196/*
5197 * Issue a global reclaim complete.
5198 */
5199static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5200{
5201 struct nfs4_reclaim_complete_data *calldata;
5202 struct rpc_task *task;
5203 struct rpc_message msg = {
5204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5205 };
5206 struct rpc_task_setup task_setup_data = {
5207 .rpc_client = clp->cl_rpcclient,
5208 .rpc_message = &msg,
5209 .callback_ops = &nfs4_reclaim_complete_call_ops,
5210 .flags = RPC_TASK_ASYNC,
5211 };
5212 int status = -ENOMEM;
5213
5214 dprintk("--> %s\n", __func__);
5215 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5216 if (calldata == NULL)
5217 goto out;
5218 calldata->clp = clp;
5219 calldata->arg.one_fs = 0;
5220 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5221
5222 msg.rpc_argp = &calldata->arg;
5223 msg.rpc_resp = &calldata->res;
5224 task_setup_data.callback_data = calldata;
5225 task = rpc_run_task(&task_setup_data);
acf82b85 5226 if (IS_ERR(task)) {
fce5c838 5227 status = PTR_ERR(task);
acf82b85
DC		 5228 goto out;
5229 }
fce5c838 5230 rpc_put_task(task);
acf82b85 5231 return 0;
fce5c838
RL		 5232out:
5233 dprintk("<-- %s status=%d\n", __func__, status);
5234 return status;
5235}
557134a3
AA		 5236#endif /* CONFIG_NFS_V4_1 */
5237
591d71cb 5238struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5239 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5240 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5241 .recover_open = nfs4_open_reclaim,
5242 .recover_lock = nfs4_lock_reclaim,
591d71cb 5243 .establish_clid = nfs4_init_clientid,
90a16617 5244 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5245};
5246
591d71cb
AA		 5247#if defined(CONFIG_NFS_V4_1)
5248struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5249 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5250 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5251 .recover_open = nfs4_open_reclaim,
5252 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5253 .establish_clid = nfs41_init_clientid,
b4b82607 5254 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5255 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5256};
5257#endif /* CONFIG_NFS_V4_1 */
5258
5259struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5260 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5261 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5262 .recover_open = nfs4_open_expired,
5263 .recover_lock = nfs4_lock_expired,
5264 .establish_clid = nfs4_init_clientid,
90a16617 5265 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5266};
5267
5268#if defined(CONFIG_NFS_V4_1)
5269struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5270 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5271 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5272 .recover_open = nfs4_open_expired,
5273 .recover_lock = nfs4_lock_expired,
4d643d1d 5274 .establish_clid = nfs41_init_clientid,
b4b82607 5275 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5276};
591d71cb 5277#endif /* CONFIG_NFS_V4_1 */
1da177e4 5278
29fba38b
BH		 5279struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5280 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5281 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5282 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5283};
5284
5285#if defined(CONFIG_NFS_V4_1)
5286struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5287 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5288 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5289 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5290};
5291#endif
5292
5293/*
5294 * Per minor version reboot and network partition recovery ops
5295 */
5296
591d71cb
AA		 5297struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5298 &nfs40_reboot_recovery_ops,
5299#if defined(CONFIG_NFS_V4_1)
5300 &nfs41_reboot_recovery_ops,
5301#endif
5302};
5303
5304struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5305 &nfs40_nograce_recovery_ops,
5306#if defined(CONFIG_NFS_V4_1)
5307 &nfs41_nograce_recovery_ops,
5308#endif
5309};
5310
29fba38b
BH		 5311struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5312 &nfs40_state_renewal_ops,
5313#if defined(CONFIG_NFS_V4_1)
5314 &nfs41_state_renewal_ops,
5315#endif
5316};
5317
92e1d5be 5318static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5319 .permission = nfs_permission,
5320 .getattr = nfs_getattr,
5321 .setattr = nfs_setattr,
5322 .getxattr = nfs4_getxattr,
5323 .setxattr = nfs4_setxattr,
5324 .listxattr = nfs4_listxattr,
5325};
5326
509de811 5327const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5328 .version = 4, /* protocol version */
5329 .dentry_ops = &nfs4_dentry_operations,
5330 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5331 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5332 .getroot = nfs4_proc_get_root,
5333 .getattr = nfs4_proc_getattr,
5334 .setattr = nfs4_proc_setattr,
2b3de441 5335 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5336 .lookup = nfs4_proc_lookup,
5337 .access = nfs4_proc_access,
5338 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5339 .create = nfs4_proc_create,
5340 .remove = nfs4_proc_remove,
5341 .unlink_setup = nfs4_proc_unlink_setup,
5342 .unlink_done = nfs4_proc_unlink_done,
5343 .rename = nfs4_proc_rename,
5344 .link = nfs4_proc_link,
5345 .symlink = nfs4_proc_symlink,
5346 .mkdir = nfs4_proc_mkdir,
5347 .rmdir = nfs4_proc_remove,
5348 .readdir = nfs4_proc_readdir,
5349 .mknod = nfs4_proc_mknod,
5350 .statfs = nfs4_proc_statfs,
5351 .fsinfo = nfs4_proc_fsinfo,
5352 .pathconf = nfs4_proc_pathconf,
e9326dca 5353 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5354 .decode_dirent = nfs4_decode_dirent,
5355 .read_setup = nfs4_proc_read_setup,
ec06c096 5356 .read_done = nfs4_read_done,
1da177e4 5357 .write_setup = nfs4_proc_write_setup,
788e7a89 5358 .write_done = nfs4_write_done,
1da177e4 5359 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5360 .commit_done = nfs4_commit_done,
1da177e4 5361 .lock = nfs4_proc_lock,
e50a1c2e 5362 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5363 .close_context = nfs4_close_context,
1da177e4
LT		 5364};
5365
5366/*
5367 * Local variables:
5368 * c-basic-offset: 8
5369 * End:
5370 */
Linux 6.x block layer and io_uring tree(s)