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nfs41: renewd sequence operations should take/put client reference
[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>
42#include <linux/sunrpc/clnt.h>
43#include <linux/nfs.h>
44#include <linux/nfs4.h>
45#include <linux/nfs_fs.h>
46#include <linux/nfs_page.h>
1da177e4 47#include <linux/namei.h>
02a913a7 48#include <linux/mount.h>
99fe60d0 49#include <linux/module.h>
5a0ffe54 50#include <linux/sunrpc/bc_xprt.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
101070ca 54#include "internal.h"
006ea73e 55#include "iostat.h"
fc931582 56#include "callback.h"
1da177e4
LT		 57
58#define NFSDBG_FACILITY NFSDBG_PROC
59
2066fe89 60#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 61#define NFS4_POLL_RETRY_MAX (15*HZ)
62
a78cb57a
TM		 63#define NFS4_MAX_LOOP_ON_RECOVER (10)
64
cdd4e68b 65struct nfs4_opendata;
864472e9 66static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 67static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 68static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 69static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 70static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
71static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 72
1da177e4 73/* Prevent leaks of NFSv4 errors into userland */
46f72f57 74static int nfs4_map_errors(int err)
1da177e4 75{
52567b03
TM		 76 if (err >= -1000)
77 return err;
78 switch (err) {
79 case -NFS4ERR_RESOURCE:
80 return -EREMOTEIO;
81 default:
1da177e4 82 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 83 __func__, -err);
52567b03 84 break;
1da177e4 85 }
52567b03 86 return -EIO;
1da177e4
LT		 87}
88
89/*
90 * This is our standard bitmap for GETATTR requests.
91 */
92const u32 nfs4_fattr_bitmap[2] = {
93 FATTR4_WORD0_TYPE
94 | FATTR4_WORD0_CHANGE
95 | FATTR4_WORD0_SIZE
96 | FATTR4_WORD0_FSID
97 | FATTR4_WORD0_FILEID,
98 FATTR4_WORD1_MODE
99 | FATTR4_WORD1_NUMLINKS
100 | FATTR4_WORD1_OWNER
101 | FATTR4_WORD1_OWNER_GROUP
102 | FATTR4_WORD1_RAWDEV
103 | FATTR4_WORD1_SPACE_USED
104 | FATTR4_WORD1_TIME_ACCESS
105 | FATTR4_WORD1_TIME_METADATA
106 | FATTR4_WORD1_TIME_MODIFY
107};
108
109const u32 nfs4_statfs_bitmap[2] = {
110 FATTR4_WORD0_FILES_AVAIL
111 | FATTR4_WORD0_FILES_FREE
112 | FATTR4_WORD0_FILES_TOTAL,
113 FATTR4_WORD1_SPACE_AVAIL
114 | FATTR4_WORD1_SPACE_FREE
115 | FATTR4_WORD1_SPACE_TOTAL
116};
117
4ce79717 118const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 119 FATTR4_WORD0_MAXLINK
120 | FATTR4_WORD0_MAXNAME,
121 0
122};
123
124const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
125 | FATTR4_WORD0_MAXREAD
126 | FATTR4_WORD0_MAXWRITE
127 | FATTR4_WORD0_LEASE_TIME,
128 0
129};
130
830b8e33
MN		 131const u32 nfs4_fs_locations_bitmap[2] = {
132 FATTR4_WORD0_TYPE
133 | FATTR4_WORD0_CHANGE
134 | FATTR4_WORD0_SIZE
135 | FATTR4_WORD0_FSID
136 | FATTR4_WORD0_FILEID
137 | FATTR4_WORD0_FS_LOCATIONS,
138 FATTR4_WORD1_MODE
139 | FATTR4_WORD1_NUMLINKS
140 | FATTR4_WORD1_OWNER
141 | FATTR4_WORD1_OWNER_GROUP
142 | FATTR4_WORD1_RAWDEV
143 | FATTR4_WORD1_SPACE_USED
144 | FATTR4_WORD1_TIME_ACCESS
145 | FATTR4_WORD1_TIME_METADATA
146 | FATTR4_WORD1_TIME_MODIFY
147 | FATTR4_WORD1_MOUNTED_ON_FILEID
148};
149
bc4785cd 150static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 151 struct nfs4_readdir_arg *readdir)
152{
0dbb4c67 153 __be32 *start, *p;
1da177e4
LT		 154
155 BUG_ON(readdir->count < 80);
156 if (cookie > 2) {
b7ef1956 157 readdir->cookie = cookie;
1da177e4
LT		 158 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
159 return;
160 }
161
162 readdir->cookie = 0;
163 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
164 if (cookie == 2)
165 return;
166
167 /*
168 * NFSv4 servers do not return entries for '.' and '..'
169 * Therefore, we fake these entries here. We let '.'
170 * have cookie 0 and '..' have cookie 1. Note that
171 * when talking to the server, we always send cookie 0
172 * instead of 1 or 2.
173 */
0dbb4c67 174 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 175
176 if (cookie == 0) {
177 *p++ = xdr_one; /* next */
178 *p++ = xdr_zero; /* cookie, first word */
179 *p++ = xdr_one; /* cookie, second word */
180 *p++ = xdr_one; /* entry len */
181 memcpy(p, ".\0\0\0", 4); /* entry */
182 p++;
183 *p++ = xdr_one; /* bitmap length */
184 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
185 *p++ = htonl(8); /* attribute buffer length */
4e769b93 186 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 187 }
188
189 *p++ = xdr_one; /* next */
190 *p++ = xdr_zero; /* cookie, first word */
191 *p++ = xdr_two; /* cookie, second word */
192 *p++ = xdr_two; /* entry len */
193 memcpy(p, "..\0\0", 4); /* entry */
194 p++;
195 *p++ = xdr_one; /* bitmap length */
196 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
197 *p++ = htonl(8); /* attribute buffer length */
4e769b93 198 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 199
200 readdir->pgbase = (char *)p - (char *)start;
201 readdir->count -= readdir->pgbase;
202 kunmap_atomic(start, KM_USER0);
203}
204
65de872e
TM		 205static int nfs4_wait_clnt_recover(struct nfs_client *clp)
206{
207 int res;
208
209 might_sleep();
210
e005e804 211 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 212 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 213 return res;
214}
215
216static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
217{
218 int res = 0;
219
220 might_sleep();
221
222 if (*timeout <= 0)
223 *timeout = NFS4_POLL_RETRY_MIN;
224 if (*timeout > NFS4_POLL_RETRY_MAX)
225 *timeout = NFS4_POLL_RETRY_MAX;
226 schedule_timeout_killable(*timeout);
227 if (fatal_signal_pending(current))
228 res = -ERESTARTSYS;
229 *timeout <<= 1;
230 return res;
231}
232
233/* This is the error handling routine for processes that are allowed
234 * to sleep.
235 */
236static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
237{
238 struct nfs_client *clp = server->nfs_client;
9e33bed5 239 struct nfs4_state *state = exception->state;
65de872e
TM		 240 int ret = errorcode;
241
242 exception->retry = 0;
243 switch(errorcode) {
244 case 0:
245 return 0;
9e33bed5
TM		 246 case -NFS4ERR_ADMIN_REVOKED:
247 case -NFS4ERR_BAD_STATEID:
248 case -NFS4ERR_OPENMODE:
249 if (state == NULL)
250 break;
251 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 252 goto do_state_recovery;
65de872e 253 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 254 if (state == NULL)
255 break;
256 nfs4_state_mark_reclaim_reboot(clp, state);
257 case -NFS4ERR_STALE_CLIENTID:
65de872e 258 case -NFS4ERR_EXPIRED:
a2c0b9e2 259 goto do_state_recovery;
03391693 260#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 261 case -NFS4ERR_BADSESSION:
262 case -NFS4ERR_BADSLOT:
263 case -NFS4ERR_BAD_HIGH_SLOT:
264 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
265 case -NFS4ERR_DEADSESSION:
266 case -NFS4ERR_SEQ_FALSE_RETRY:
267 case -NFS4ERR_SEQ_MISORDERED:
268 dprintk("%s ERROR: %d Reset session\n", __func__,
269 errorcode);
0b9e2d41 270 nfs4_schedule_state_recovery(clp);
4745e315 271 exception->retry = 1;
b9179237 272 break;
03391693 273#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 274 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 275 if (exception->timeout > HZ) {
276 /* We have retried a decent amount, time to
277 * fail
278 */
279 ret = -EBUSY;
280 break;
281 }
65de872e
TM		 282 case -NFS4ERR_GRACE:
283 case -NFS4ERR_DELAY:
2c643488 284 case -EKEYEXPIRED:
65de872e
TM		 285 ret = nfs4_delay(server->client, &exception->timeout);
286 if (ret != 0)
287 break;
288 case -NFS4ERR_OLD_STATEID:
289 exception->retry = 1;
290 }
291 /* We failed to handle the error */
292 return nfs4_map_errors(ret);
a2c0b9e2
TM		 293do_state_recovery:
294 nfs4_schedule_state_recovery(clp);
295 ret = nfs4_wait_clnt_recover(clp);
296 if (ret == 0)
297 exception->retry = 1;
298 return ret;
65de872e
TM		 299}
300
301
26e976a8 302static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 303{
7539bbab 304 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 305 spin_lock(&clp->cl_lock);
306 if (time_before(clp->cl_last_renewal,timestamp))
307 clp->cl_last_renewal = timestamp;
308 spin_unlock(&clp->cl_lock);
309}
310
cccef3b9
AA		 311#if defined(CONFIG_NFS_V4_1)
312
e2c4ab3c
AA		 313/*
314 * nfs4_free_slot - free a slot and efficiently update slot table.
315 *
316 * freeing a slot is trivially done by clearing its respective bit
317 * in the bitmap.
318 * If the freed slotid equals highest_used_slotid we want to update it
319 * so that the server would be able to size down the slot table if needed,
320 * otherwise we know that the highest_used_slotid is still in use.
321 * When updating highest_used_slotid there may be "holes" in the bitmap
322 * so we need to scan down from highest_used_slotid to 0 looking for the now
323 * highest slotid in use.
324 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 325 *
326 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 327 */
328static void
329nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
330{
331 int slotid = free_slotid;
332
e2c4ab3c
AA		 333 /* clear used bit in bitmap */
334 __clear_bit(slotid, tbl->used_slots);
335
336 /* update highest_used_slotid when it is freed */
337 if (slotid == tbl->highest_used_slotid) {
338 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 339 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 340 tbl->highest_used_slotid = slotid;
341 else
342 tbl->highest_used_slotid = -1;
343 }
e2c4ab3c
AA		 344 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
345 free_slotid, tbl->highest_used_slotid);
346}
347
3bfb0fc5
AB		 348/*
349 * Signal state manager thread if session is drained
350 */
351static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
352{
689cf5c1
AB		 353 struct rpc_task *task;
354
3bfb0fc5 355 if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
689cf5c1
AB		 356 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
357 if (task)
358 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 359 return;
360 }
361
362 if (ses->fc_slot_table.highest_used_slotid != -1)
363 return;
364
365 dprintk("%s COMPLETE: Session Drained\n", __func__);
366 complete(&ses->complete);
367}
368
d61e612a 369static void nfs41_sequence_free_slot(const struct nfs_client *clp,
13615871
AA		 370 struct nfs4_sequence_res *res)
371{
372 struct nfs4_slot_table *tbl;
373
13615871
AA		 374 tbl = &clp->cl_session->fc_slot_table;
375 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 376 /* just wake up the next guy waiting since
377 * we may have not consumed a slot after all */
691daf3b 378 dprintk("%s: No slot\n", __func__);
35dc1d74 379 return;
13615871 380 }
ea028ac9 381
35dc1d74
TM		 382 spin_lock(&tbl->slot_tbl_lock);
383 nfs4_free_slot(tbl, res->sr_slotid);
3bfb0fc5 384 nfs41_check_drain_session_complete(clp->cl_session);
35dc1d74
TM		 385 spin_unlock(&tbl->slot_tbl_lock);
386 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 387}
388
b0df806c
AA		 389static void nfs41_sequence_done(struct nfs_client *clp,
390 struct nfs4_sequence_res *res,
391 int rpc_status)
392{
393 unsigned long timestamp;
394 struct nfs4_slot_table *tbl;
395 struct nfs4_slot *slot;
396
397 /*
398 * sr_status remains 1 if an RPC level error occurred. The server
399 * may or may not have processed the sequence operation..
400 * Proceed as if the server received and processed the sequence
401 * operation.
402 */
403 if (res->sr_status == 1)
404 res->sr_status = NFS_OK;
405
406 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
407 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
408 goto out;
409
691daf3b 410 /* Check the SEQUENCE operation status */
b0df806c 411 if (res->sr_status == 0) {
691daf3b
AA		 412 tbl = &clp->cl_session->fc_slot_table;
413 slot = tbl->slots + res->sr_slotid;
b0df806c
AA		 414 /* Update the slot's sequence and clientid lease timer */
415 ++slot->seq_nr;
416 timestamp = res->sr_renewal_time;
417 spin_lock(&clp->cl_lock);
418 if (time_before(clp->cl_last_renewal, timestamp))
419 clp->cl_last_renewal = timestamp;
420 spin_unlock(&clp->cl_lock);
0629e370 421 /* Check sequence flags */
7135840f
AB		 422 if (atomic_read(&clp->cl_count) > 1)
423 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
b0df806c
AA		 424 }
425out:
426 /* The session may be reset by one of the error handlers. */
427 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
428 nfs41_sequence_free_slot(clp, res);
429}
430
510b8175
BH		 431/*
432 * nfs4_find_slot - efficiently look for a free slot
433 *
434 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
435 * If found, we mark the slot as used, update the highest_used_slotid,
436 * and respectively set up the sequence operation args.
437 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 438 *
439 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 440 */
441static u8
40ead580 442nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 443{
444 int slotid;
445 u8 ret_id = NFS4_MAX_SLOT_TABLE;
446 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
447
510b8175
BH		 448 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
449 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
450 tbl->max_slots);
451 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
452 if (slotid >= tbl->max_slots)
453 goto out;
454 __set_bit(slotid, tbl->used_slots);
455 if (slotid > tbl->highest_used_slotid)
456 tbl->highest_used_slotid = slotid;
457 ret_id = slotid;
458out:
459 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
460 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 461 return ret_id;
462}
463
ce5039c1
AA		 464static int nfs41_setup_sequence(struct nfs4_session *session,
465 struct nfs4_sequence_args *args,
466 struct nfs4_sequence_res *res,
467 int cache_reply,
468 struct rpc_task *task)
469{
fbcd4abc
AA		 470 struct nfs4_slot *slot;
471 struct nfs4_slot_table *tbl;
472 u8 slotid;
473
474 dprintk("--> %s\n", __func__);
ce5039c1
AA		 475 /* slot already allocated? */
476 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
477 return 0;
478
479 memset(res, 0, sizeof(*res));
480 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 481 tbl = &session->fc_slot_table;
482
483 spin_lock(&tbl->slot_tbl_lock);
5601a00d
AB		 484 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
485 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 486 /*
487 * The state manager will wait until the slot table is empty.
488 * Schedule the reset thread
489 */
05f0d236 490 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 491 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 492 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 493 return -EAGAIN;
b069d94a
AA		 494 }
495
689cf5c1
AB		 496 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
497 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
498 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
499 spin_unlock(&tbl->slot_tbl_lock);
500 dprintk("%s enforce FIFO order\n", __func__);
501 return -EAGAIN;
502 }
503
40ead580 504 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 505 if (slotid == NFS4_MAX_SLOT_TABLE) {
506 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
507 spin_unlock(&tbl->slot_tbl_lock);
508 dprintk("<-- %s: no free slots\n", __func__);
509 return -EAGAIN;
510 }
511 spin_unlock(&tbl->slot_tbl_lock);
512
689cf5c1 513 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 514 slot = tbl->slots + slotid;
99fe60d0 515 args->sa_session = session;
fbcd4abc
AA		 516 args->sa_slotid = slotid;
517 args->sa_cache_this = cache_reply;
518
519 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
520
99fe60d0 521 res->sr_session = session;
fbcd4abc
AA		 522 res->sr_slotid = slotid;
523 res->sr_renewal_time = jiffies;
524 /*
525 * sr_status is only set in decode_sequence, and so will remain
526 * set to 1 if an rpc level failure occurs.
527 */
528 res->sr_status = 1;
ce5039c1
AA		 529 return 0;
530}
531
532int nfs4_setup_sequence(struct nfs_client *clp,
533 struct nfs4_sequence_args *args,
534 struct nfs4_sequence_res *res,
535 int cache_reply,
536 struct rpc_task *task)
537{
538 int ret = 0;
539
540 dprintk("--> %s clp %p session %p sr_slotid %d\n",
541 __func__, clp, clp->cl_session, res->sr_slotid);
542
543 if (!nfs4_has_session(clp))
544 goto out;
545 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
546 task);
2628eddf 547 if (ret && ret != -EAGAIN) {
ce5039c1
AA		 548 /* terminate rpc task */
549 task->tk_status = ret;
550 task->tk_action = NULL;
551 }
552out:
553 dprintk("<-- %s status=%d\n", __func__, ret);
554 return ret;
555}
556
557struct nfs41_call_sync_data {
558 struct nfs_client *clp;
559 struct nfs4_sequence_args *seq_args;
560 struct nfs4_sequence_res *seq_res;
561 int cache_reply;
562};
563
564static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
565{
566 struct nfs41_call_sync_data *data = calldata;
567
568 dprintk("--> %s data->clp->cl_session %p\n", __func__,
569 data->clp->cl_session);
570 if (nfs4_setup_sequence(data->clp, data->seq_args,
571 data->seq_res, data->cache_reply, task))
572 return;
573 rpc_call_start(task);
574}
575
b257957e
AB		 576static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
577{
578 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
579 nfs41_call_sync_prepare(task, calldata);
580}
581
69ab40c4
AA		 582static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
583{
584 struct nfs41_call_sync_data *data = calldata;
585
586 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
69ab40c4
AA		 587}
588
ce5039c1
AA		 589struct rpc_call_ops nfs41_call_sync_ops = {
590 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 591 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 592};
593
b257957e
AB		 594struct rpc_call_ops nfs41_call_priv_sync_ops = {
595 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
596 .rpc_call_done = nfs41_call_sync_done,
597};
598
ce5039c1
AA		 599static int nfs4_call_sync_sequence(struct nfs_client *clp,
600 struct rpc_clnt *clnt,
601 struct rpc_message *msg,
602 struct nfs4_sequence_args *args,
603 struct nfs4_sequence_res *res,
b257957e
AB		 604 int cache_reply,
605 int privileged)
ce5039c1
AA		 606{
607 int ret;
608 struct rpc_task *task;
609 struct nfs41_call_sync_data data = {
610 .clp = clp,
611 .seq_args = args,
612 .seq_res = res,
613 .cache_reply = cache_reply,
614 };
615 struct rpc_task_setup task_setup = {
616 .rpc_client = clnt,
617 .rpc_message = msg,
618 .callback_ops = &nfs41_call_sync_ops,
619 .callback_data = &data
620 };
621
622 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 623 if (privileged)
624 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 625 task = rpc_run_task(&task_setup);
626 if (IS_ERR(task))
627 ret = PTR_ERR(task);
628 else {
629 ret = task->tk_status;
630 rpc_put_task(task);
631 }
632 return ret;
633}
634
cccef3b9
AA		 635int _nfs4_call_sync_session(struct nfs_server *server,
636 struct rpc_message *msg,
637 struct nfs4_sequence_args *args,
638 struct nfs4_sequence_res *res,
639 int cache_reply)
640{
ce5039c1 641 return nfs4_call_sync_sequence(server->nfs_client, server->client,
b257957e 642 msg, args, res, cache_reply, 0);
cccef3b9
AA		 643}
644
645#endif /* CONFIG_NFS_V4_1 */
646
647int _nfs4_call_sync(struct nfs_server *server,
648 struct rpc_message *msg,
649 struct nfs4_sequence_args *args,
650 struct nfs4_sequence_res *res,
651 int cache_reply)
652{
f3752975 653 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 654 return rpc_call_sync(server->client, msg, 0);
655}
656
657#define nfs4_call_sync(server, msg, args, res, cache_reply) \
658 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
659 &(res)->seq_res, (cache_reply))
660
b0df806c
AA		 661static void nfs4_sequence_done(const struct nfs_server *server,
662 struct nfs4_sequence_res *res, int rpc_status)
663{
664#ifdef CONFIG_NFS_V4_1
665 if (nfs4_has_session(server->nfs_client))
666 nfs41_sequence_done(server->nfs_client, res, rpc_status);
667#endif /* CONFIG_NFS_V4_1 */
668}
669
38478b24 670static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 671{
38478b24 672 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 673
38478b24 674 spin_lock(&dir->i_lock);
40d24704
TM		 675 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
676 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 677 nfs_force_lookup_revalidate(dir);
40d24704 678 nfsi->change_attr = cinfo->after;
38478b24 679 spin_unlock(&dir->i_lock);
1da177e4
LT		 680}
681
e56e0b78 682struct nfs4_opendata {
c6d00e63 683 struct kref kref;
e56e0b78
TM		 684 struct nfs_openargs o_arg;
685 struct nfs_openres o_res;
cdd4e68b
TM		 686 struct nfs_open_confirmargs c_arg;
687 struct nfs_open_confirmres c_res;
e56e0b78
TM		 688 struct nfs_fattr f_attr;
689 struct nfs_fattr dir_attr;
ad389da7 690 struct path path;
e56e0b78
TM		 691 struct dentry *dir;
692 struct nfs4_state_owner *owner;
aac00a8d 693 struct nfs4_state *state;
e56e0b78 694 struct iattr attrs;
26e976a8 695 unsigned long timestamp;
3e309914 696 unsigned int rpc_done : 1;
24ac23ab
TM		 697 int rpc_status;
698 int cancelled;
e56e0b78
TM		 699};
700
2ced46c2
TM		 701
702static void nfs4_init_opendata_res(struct nfs4_opendata *p)
703{
704 p->o_res.f_attr = &p->f_attr;
705 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 706 p->o_res.seqid = p->o_arg.seqid;
707 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 708 p->o_res.server = p->o_arg.server;
709 nfs_fattr_init(&p->f_attr);
710 nfs_fattr_init(&p->dir_attr);
578e4585 711 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 712}
713
ad389da7 714static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 715 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 716 const struct iattr *attrs)
717{
ad389da7 718 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 719 struct inode *dir = parent->d_inode;
720 struct nfs_server *server = NFS_SERVER(dir);
721 struct nfs4_opendata *p;
722
723 p = kzalloc(sizeof(*p), GFP_KERNEL);
724 if (p == NULL)
725 goto err;
726 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
727 if (p->o_arg.seqid == NULL)
728 goto err_free;
ad389da7
TM		 729 p->path.mnt = mntget(path->mnt);
730 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 731 p->dir = parent;
732 p->owner = sp;
733 atomic_inc(&sp->so_count);
734 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 735 p->o_arg.open_flags = flags;
736 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 737 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 738 p->o_arg.id = sp->so_owner_id.id;
ad389da7 739 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 740 p->o_arg.server = server;
741 p->o_arg.bitmask = server->attr_bitmask;
742 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78 743 if (flags & O_EXCL) {
4882ef72
AB		 744 if (nfs4_has_persistent_session(server->nfs_client)) {
745 /* GUARDED */
746 p->o_arg.u.attrs = &p->attrs;
747 memcpy(&p->attrs, attrs, sizeof(p->attrs));
748 } else { /* EXCLUSIVE4_1 */
749 u32 *s = (u32 *) p->o_arg.u.verifier.data;
750 s[0] = jiffies;
751 s[1] = current->pid;
752 }
e56e0b78
TM		 753 } else if (flags & O_CREAT) {
754 p->o_arg.u.attrs = &p->attrs;
755 memcpy(&p->attrs, attrs, sizeof(p->attrs));
756 }
cdd4e68b
TM		 757 p->c_arg.fh = &p->o_res.fh;
758 p->c_arg.stateid = &p->o_res.stateid;
759 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 760 nfs4_init_opendata_res(p);
c6d00e63 761 kref_init(&p->kref);
e56e0b78
TM		 762 return p;
763err_free:
764 kfree(p);
765err:
766 dput(parent);
767 return NULL;
768}
769
c6d00e63 770static void nfs4_opendata_free(struct kref *kref)
e56e0b78 771{
c6d00e63
TM		 772 struct nfs4_opendata *p = container_of(kref,
773 struct nfs4_opendata, kref);
774
775 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 776 if (p->state != NULL)
777 nfs4_put_open_state(p->state);
c6d00e63
TM		 778 nfs4_put_state_owner(p->owner);
779 dput(p->dir);
31f31db1 780 path_put(&p->path);
c6d00e63
TM		 781 kfree(p);
782}
783
784static void nfs4_opendata_put(struct nfs4_opendata *p)
785{
786 if (p != NULL)
787 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 788}
789
06f814a3
TM		 790static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
791{
06f814a3
TM		 792 int ret;
793
06f814a3 794 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 795 return ret;
796}
797
dc0b027d 798static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 799{
800 int ret = 0;
dc0b027d
TM		 801
802 if (open_mode & O_EXCL)
803 goto out;
804 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 805 case FMODE_READ:
88069f77
TM		 806 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
807 && state->n_rdonly != 0;
6ee41268
TM		 808 break;
809 case FMODE_WRITE:
88069f77
TM		 810 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
811 && state->n_wronly != 0;
6ee41268
TM		 812 break;
813 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 814 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
815 && state->n_rdwr != 0;
6ee41268 816 }
dc0b027d 817out:
6ee41268
TM		 818 return ret;
819}
820
dc0b027d 821static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 822{
dc0b027d 823 if ((delegation->type & fmode) != fmode)
aac00a8d 824 return 0;
15c831bf 825 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 826 return 0;
b7391f44 827 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 828 return 1;
829}
830
dc0b027d 831static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 832{
dc0b027d 833 switch (fmode) {
e7616923
TM		 834 case FMODE_WRITE:
835 state->n_wronly++;
836 break;
837 case FMODE_READ:
838 state->n_rdonly++;
839 break;
840 case FMODE_READ|FMODE_WRITE:
841 state->n_rdwr++;
842 }
dc0b027d 843 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 844}
845
dc0b027d 846static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 847{
848 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
849 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
850 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 851 switch (fmode) {
003707c7
TM		 852 case FMODE_READ:
853 set_bit(NFS_O_RDONLY_STATE, &state->flags);
854 break;
855 case FMODE_WRITE:
856 set_bit(NFS_O_WRONLY_STATE, &state->flags);
857 break;
858 case FMODE_READ|FMODE_WRITE:
859 set_bit(NFS_O_RDWR_STATE, &state->flags);
860 }
e7616923
TM		 861}
862
dc0b027d 863static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 864{
8bda4e4c 865 write_seqlock(&state->seqlock);
dc0b027d 866 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 867 write_sequnlock(&state->seqlock);
003707c7
TM		 868}
869
dc0b027d 870static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 871{
8bda4e4c
TM		 872 /*
873 * Protect the call to nfs4_state_set_mode_locked and
874 * serialise the stateid update
875 */
876 write_seqlock(&state->seqlock);
003707c7
TM		 877 if (deleg_stateid != NULL) {
878 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
879 set_bit(NFS_DELEGATED_STATE, &state->flags);
880 }
881 if (open_stateid != NULL)
dc0b027d 882 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 883 write_sequnlock(&state->seqlock);
884 spin_lock(&state->owner->so_lock);
dc0b027d 885 update_open_stateflags(state, fmode);
ec073428 886 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 887}
888
dc0b027d 889static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 890{
891 struct nfs_inode *nfsi = NFS_I(state->inode);
892 struct nfs_delegation *deleg_cur;
893 int ret = 0;
894
dc0b027d 895 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 896
897 rcu_read_lock();
898 deleg_cur = rcu_dereference(nfsi->delegation);
899 if (deleg_cur == NULL)
900 goto no_delegation;
901
902 spin_lock(&deleg_cur->lock);
903 if (nfsi->delegation != deleg_cur ||
dc0b027d 904 (deleg_cur->type & fmode) != fmode)
34310430
TM		 905 goto no_delegation_unlock;
906
907 if (delegation == NULL)
908 delegation = &deleg_cur->stateid;
909 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
910 goto no_delegation_unlock;
911
b7391f44 912 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 913 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 914 ret = 1;
915no_delegation_unlock:
916 spin_unlock(&deleg_cur->lock);
917no_delegation:
918 rcu_read_unlock();
919
920 if (!ret && open_stateid != NULL) {
dc0b027d 921 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 922 ret = 1;
923 }
924
925 return ret;
926}
927
928
dc0b027d 929static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 930{
931 struct nfs_delegation *delegation;
932
933 rcu_read_lock();
934 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 935 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 936 rcu_read_unlock();
937 return;
938 }
939 rcu_read_unlock();
940 nfs_inode_return_delegation(inode);
941}
942
6ee41268 943static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 944{
945 struct nfs4_state *state = opendata->state;
946 struct nfs_inode *nfsi = NFS_I(state->inode);
947 struct nfs_delegation *delegation;
dc0b027d
TM		 948 int open_mode = opendata->o_arg.open_flags & O_EXCL;
949 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 950 nfs4_stateid stateid;
951 int ret = -EAGAIN;
952
aac00a8d 953 for (;;) {
dc0b027d 954 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 955 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 956 if (can_open_cached(state, fmode, open_mode)) {
957 update_open_stateflags(state, fmode);
6ee41268 958 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 959 goto out_return_state;
960 }
961 spin_unlock(&state->owner->so_lock);
962 }
34310430
TM		 963 rcu_read_lock();
964 delegation = rcu_dereference(nfsi->delegation);
965 if (delegation == NULL ||
dc0b027d 966 !can_open_delegated(delegation, fmode)) {
34310430 967 rcu_read_unlock();
aac00a8d 968 break;
34310430 969 }
aac00a8d
TM		 970 /* Save the delegation */
971 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
972 rcu_read_unlock();
af22f94a 973 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 974 if (ret != 0)
975 goto out;
976 ret = -EAGAIN;
34310430
TM		 977
978 /* Try to update the stateid using the delegation */
dc0b027d 979 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 980 goto out_return_state;
aac00a8d 981 }
aac00a8d
TM		 982out:
983 return ERR_PTR(ret);
984out_return_state:
985 atomic_inc(&state->count);
986 return state;
987}
988
24ac23ab
TM		 989static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
990{
991 struct inode *inode;
992 struct nfs4_state *state = NULL;
003707c7 993 struct nfs_delegation *delegation;
1b370bc2 994 int ret;
24ac23ab 995
aac00a8d 996 if (!data->rpc_done) {
6ee41268 997 state = nfs4_try_open_cached(data);
aac00a8d
TM		 998 goto out;
999 }
1000
1b370bc2 1001 ret = -EAGAIN;
24ac23ab 1002 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1003 goto err;
24ac23ab 1004 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1005 ret = PTR_ERR(inode);
03f28e3a 1006 if (IS_ERR(inode))
1b370bc2
TM		 1007 goto err;
1008 ret = -ENOMEM;
24ac23ab
TM		 1009 state = nfs4_get_open_state(inode, data->owner);
1010 if (state == NULL)
1b370bc2 1011 goto err_put_inode;
549d6ed5 1012 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1013 int delegation_flags = 0;
1014
003707c7
TM		 1015 rcu_read_lock();
1016 delegation = rcu_dereference(NFS_I(inode)->delegation);
1017 if (delegation)
1018 delegation_flags = delegation->flags;
1019 rcu_read_unlock();
15c831bf 1020 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1021 nfs_inode_set_delegation(state->inode,
1022 data->owner->so_cred,
1023 &data->o_res);
1024 else
1025 nfs_inode_reclaim_delegation(state->inode,
1026 data->owner->so_cred,
1027 &data->o_res);
1028 }
34310430
TM		 1029
1030 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1031 data->o_arg.fmode);
24ac23ab 1032 iput(inode);
aac00a8d 1033out:
24ac23ab 1034 return state;
1b370bc2
TM		 1035err_put_inode:
1036 iput(inode);
1037err:
1038 return ERR_PTR(ret);
24ac23ab
TM		 1039}
1040
864472e9
TM		 1041static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1042{
1043 struct nfs_inode *nfsi = NFS_I(state->inode);
1044 struct nfs_open_context *ctx;
1045
1046 spin_lock(&state->inode->i_lock);
1047 list_for_each_entry(ctx, &nfsi->open_files, list) {
1048 if (ctx->state != state)
1049 continue;
1050 get_nfs_open_context(ctx);
1051 spin_unlock(&state->inode->i_lock);
1052 return ctx;
1053 }
1054 spin_unlock(&state->inode->i_lock);
1055 return ERR_PTR(-ENOENT);
1056}
1057
6f220ed5
TM		 1058static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1059{
1060 struct nfs4_opendata *opendata;
1061
dc0b027d 1062 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1063 if (opendata == NULL)
1064 return ERR_PTR(-ENOMEM);
1065 opendata->state = state;
1066 atomic_inc(&state->count);
1067 return opendata;
1068}
1069
dc0b027d 1070static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1071{
2ced46c2 1072 struct nfs4_state *newstate;
864472e9
TM		 1073 int ret;
1074
dc0b027d
TM		 1075 opendata->o_arg.open_flags = 0;
1076 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1077 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1078 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1079 nfs4_init_opendata_res(opendata);
b257957e 1080 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1081 if (ret != 0)
1082 return ret;
2ced46c2 1083 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1084 if (IS_ERR(newstate))
1085 return PTR_ERR(newstate);
dc0b027d 1086 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1087 *res = newstate;
864472e9
TM		 1088 return 0;
1089}
1090
1091static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1092{
864472e9 1093 struct nfs4_state *newstate;
864472e9
TM		 1094 int ret;
1095
1096 /* memory barrier prior to reading state->n_* */
2ced46c2 1097 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1098 smp_rmb();
1099 if (state->n_rdwr != 0) {
2ced46c2 1100 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1101 if (ret != 0)
1102 return ret;
2ced46c2
TM		 1103 if (newstate != state)
1104 return -ESTALE;
864472e9
TM		 1105 }
1106 if (state->n_wronly != 0) {
2ced46c2 1107 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1108 if (ret != 0)
1109 return ret;
2ced46c2
TM		 1110 if (newstate != state)
1111 return -ESTALE;
864472e9
TM		 1112 }
1113 if (state->n_rdonly != 0) {
2ced46c2 1114 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1115 if (ret != 0)
1116 return ret;
2ced46c2
TM		 1117 if (newstate != state)
1118 return -ESTALE;
864472e9 1119 }
1ac7e2fd
TM		 1120 /*
1121 * We may have performed cached opens for all three recoveries.
1122 * Check if we need to update the current stateid.
1123 */
1124 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1125 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1126 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1127 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1128 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1129 write_sequnlock(&state->seqlock);
1ac7e2fd 1130 }
864472e9
TM		 1131 return 0;
1132}
1133
1da177e4
LT		 1134/*
1135 * OPEN_RECLAIM:
1136 * reclaim state on the server after a reboot.
1da177e4 1137 */
539cd03a 1138static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1139{
1ac7e2fd 1140 struct nfs_delegation *delegation;
864472e9 1141 struct nfs4_opendata *opendata;
dc0b027d 1142 fmode_t delegation_type = 0;
1da177e4
LT		 1143 int status;
1144
6f220ed5
TM		 1145 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1146 if (IS_ERR(opendata))
1147 return PTR_ERR(opendata);
864472e9
TM		 1148 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1149 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1150 rcu_read_lock();
1151 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1152 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1153 delegation_type = delegation->type;
1ac7e2fd 1154 rcu_read_unlock();
864472e9
TM		 1155 opendata->o_arg.u.delegation_type = delegation_type;
1156 status = nfs4_open_recover(opendata, state);
c6d00e63 1157 nfs4_opendata_put(opendata);
1da177e4
LT		 1158 return status;
1159}
1160
539cd03a 1161static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1162{
1163 struct nfs_server *server = NFS_SERVER(state->inode);
1164 struct nfs4_exception exception = { };
1165 int err;
1166 do {
539cd03a 1167 err = _nfs4_do_open_reclaim(ctx, state);
2c643488 1168 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 1169 break;
1170 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1171 } while (exception.retry);
1172 return err;
1173}
1174
864472e9
TM		 1175static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1176{
1177 struct nfs_open_context *ctx;
1178 int ret;
1179
1180 ctx = nfs4_state_find_open_context(state);
1181 if (IS_ERR(ctx))
1182 return PTR_ERR(ctx);
539cd03a 1183 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1184 put_nfs_open_context(ctx);
1185 return ret;
1186}
1187
13437e12 1188static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1189{
e56e0b78 1190 struct nfs4_opendata *opendata;
864472e9 1191 int ret;
1da177e4 1192
6f220ed5
TM		 1193 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1194 if (IS_ERR(opendata))
1195 return PTR_ERR(opendata);
e56e0b78 1196 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1197 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1198 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1199 ret = nfs4_open_recover(opendata, state);
c6d00e63 1200 nfs4_opendata_put(opendata);
864472e9 1201 return ret;
1da177e4
LT		 1202}
1203
13437e12 1204int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1205{
1206 struct nfs4_exception exception = { };
539cd03a 1207 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1208 int err;
1209 do {
13437e12 1210 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1211 switch (err) {
1212 case 0:
965b5d67
TM		 1213 case -ENOENT:
1214 case -ESTALE:
1215 goto out;
bcfa49f6
RL		 1216 case -NFS4ERR_BADSESSION:
1217 case -NFS4ERR_BADSLOT:
1218 case -NFS4ERR_BAD_HIGH_SLOT:
1219 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1220 case -NFS4ERR_DEADSESSION:
1221 nfs4_schedule_state_recovery(
1222 server->nfs_client);
1223 goto out;
1da177e4
LT		 1224 case -NFS4ERR_STALE_CLIENTID:
1225 case -NFS4ERR_STALE_STATEID:
1226 case -NFS4ERR_EXPIRED:
1227 /* Don't recall a delegation if it was lost */
7539bbab 1228 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1229 goto out;
1230 case -ERESTARTSYS:
1231 /*
1232 * The show must go on: exit, but mark the
1233 * stateid as needing recovery.
1234 */
1235 case -NFS4ERR_ADMIN_REVOKED:
1236 case -NFS4ERR_BAD_STATEID:
1237 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1238 case -ENOMEM:
1239 err = 0;
1240 goto out;
1da177e4
LT		 1241 }
1242 err = nfs4_handle_exception(server, err, &exception);
1243 } while (exception.retry);
965b5d67 1244out:
1da177e4
LT		 1245 return err;
1246}
1247
cdd4e68b
TM		 1248static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1249{
1250 struct nfs4_opendata *data = calldata;
1251
1252 data->rpc_status = task->tk_status;
1253 if (RPC_ASSASSINATED(task))
1254 return;
26e976a8 1255 if (data->rpc_status == 0) {
cdd4e68b
TM		 1256 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1257 sizeof(data->o_res.stateid.data));
bb22629e 1258 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1259 renew_lease(data->o_res.server, data->timestamp);
3e309914 1260 data->rpc_done = 1;
26e976a8 1261 }
cdd4e68b
TM		 1262}
1263
1264static void nfs4_open_confirm_release(void *calldata)
1265{
1266 struct nfs4_opendata *data = calldata;
1267 struct nfs4_state *state = NULL;
1268
1269 /* If this request hasn't been cancelled, do nothing */
1270 if (data->cancelled == 0)
1271 goto out_free;
1272 /* In case of error, no cleanup! */
3e309914 1273 if (!data->rpc_done)
cdd4e68b 1274 goto out_free;
cdd4e68b 1275 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1276 if (!IS_ERR(state))
dc0b027d 1277 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1278out_free:
c6d00e63 1279 nfs4_opendata_put(data);
cdd4e68b
TM		 1280}
1281
1282static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1283 .rpc_call_done = nfs4_open_confirm_done,
1284 .rpc_release = nfs4_open_confirm_release,
1285};
1286
1287/*
1288 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1289 */
1290static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1291{
1292 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1293 struct rpc_task *task;
5138fde0
TM		 1294 struct rpc_message msg = {
1295 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1296 .rpc_argp = &data->c_arg,
1297 .rpc_resp = &data->c_res,
1298 .rpc_cred = data->owner->so_cred,
1299 };
c970aa85
TM		 1300 struct rpc_task_setup task_setup_data = {
1301 .rpc_client = server->client,
5138fde0 1302 .rpc_message = &msg,
c970aa85
TM		 1303 .callback_ops = &nfs4_open_confirm_ops,
1304 .callback_data = data,
101070ca 1305 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1306 .flags = RPC_TASK_ASYNC,
1307 };
1da177e4
LT		 1308 int status;
1309
c6d00e63 1310 kref_get(&data->kref);
3e309914
TM		 1311 data->rpc_done = 0;
1312 data->rpc_status = 0;
5138fde0 1313 data->timestamp = jiffies;
c970aa85 1314 task = rpc_run_task(&task_setup_data);
7a1218a2 1315 if (IS_ERR(task))
cdd4e68b 1316 return PTR_ERR(task);
cdd4e68b
TM		 1317 status = nfs4_wait_for_completion_rpc_task(task);
1318 if (status != 0) {
1319 data->cancelled = 1;
1320 smp_wmb();
1321 } else
1322 status = data->rpc_status;
e6b3c4db 1323 rpc_put_task(task);
1da177e4
LT		 1324 return status;
1325}
1326
24ac23ab 1327static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1328{
24ac23ab
TM		 1329 struct nfs4_opendata *data = calldata;
1330 struct nfs4_state_owner *sp = data->owner;
5138fde0 1331
24ac23ab
TM		 1332 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1333 return;
aac00a8d
TM		 1334 /*
1335 * Check if we still need to send an OPEN call, or if we can use
1336 * a delegation instead.
1337 */
1338 if (data->state != NULL) {
1339 struct nfs_delegation *delegation;
1340
dc0b027d 1341 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1342 goto out_no_action;
aac00a8d
TM		 1343 rcu_read_lock();
1344 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1345 if (delegation != NULL &&
15c831bf 1346 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1347 rcu_read_unlock();
6ee41268 1348 goto out_no_action;
aac00a8d
TM		 1349 }
1350 rcu_read_unlock();
1351 }
24ac23ab 1352 /* Update sequence id. */
9f958ab8 1353 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1354 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1355 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1356 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1357 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1358 }
26e976a8 1359 data->timestamp = jiffies;
d898528c
AA		 1360 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1361 &data->o_arg.seq_args,
1362 &data->o_res.seq_res, 1, task))
1363 return;
5138fde0 1364 rpc_call_start(task);
6ee41268
TM		 1365 return;
1366out_no_action:
1367 task->tk_action = NULL;
1368
24ac23ab 1369}
1da177e4 1370
b257957e
AB		 1371static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1372{
1373 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1374 nfs4_open_prepare(task, calldata);
1375}
1376
24ac23ab
TM		 1377static void nfs4_open_done(struct rpc_task *task, void *calldata)
1378{
1379 struct nfs4_opendata *data = calldata;
1da177e4 1380
24ac23ab 1381 data->rpc_status = task->tk_status;
d898528c 1382
d61e612a
TM		 1383 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1384 task->tk_status);
d898528c 1385
24ac23ab
TM		 1386 if (RPC_ASSASSINATED(task))
1387 return;
1388 if (task->tk_status == 0) {
1389 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1390 case S_IFREG:
1391 break;
1392 case S_IFLNK:
24ac23ab 1393 data->rpc_status = -ELOOP;
6f926b5b
TM		 1394 break;
1395 case S_IFDIR:
24ac23ab 1396 data->rpc_status = -EISDIR;
6f926b5b
TM		 1397 break;
1398 default:
24ac23ab 1399 data->rpc_status = -ENOTDIR;
6f926b5b 1400 }
26e976a8 1401 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1402 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1403 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1404 }
3e309914 1405 data->rpc_done = 1;
24ac23ab 1406}
6f926b5b 1407
24ac23ab
TM		 1408static void nfs4_open_release(void *calldata)
1409{
1410 struct nfs4_opendata *data = calldata;
1411 struct nfs4_state *state = NULL;
1412
1413 /* If this request hasn't been cancelled, do nothing */
1414 if (data->cancelled == 0)
1415 goto out_free;
1416 /* In case of error, no cleanup! */
3e309914 1417 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1418 goto out_free;
1419 /* In case we need an open_confirm, no cleanup! */
1420 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1421 goto out_free;
24ac23ab 1422 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1423 if (!IS_ERR(state))
dc0b027d 1424 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1425out_free:
c6d00e63 1426 nfs4_opendata_put(data);
24ac23ab
TM		 1427}
1428
1429static const struct rpc_call_ops nfs4_open_ops = {
1430 .rpc_call_prepare = nfs4_open_prepare,
1431 .rpc_call_done = nfs4_open_done,
1432 .rpc_release = nfs4_open_release,
1433};
1434
b257957e
AB		 1435static const struct rpc_call_ops nfs4_recover_open_ops = {
1436 .rpc_call_prepare = nfs4_recover_open_prepare,
1437 .rpc_call_done = nfs4_open_done,
1438 .rpc_release = nfs4_open_release,
1439};
1440
1441static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1442{
1443 struct inode *dir = data->dir->d_inode;
1444 struct nfs_server *server = NFS_SERVER(dir);
1445 struct nfs_openargs *o_arg = &data->o_arg;
1446 struct nfs_openres *o_res = &data->o_res;
1447 struct rpc_task *task;
5138fde0
TM		 1448 struct rpc_message msg = {
1449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1450 .rpc_argp = o_arg,
1451 .rpc_resp = o_res,
1452 .rpc_cred = data->owner->so_cred,
1453 };
c970aa85
TM		 1454 struct rpc_task_setup task_setup_data = {
1455 .rpc_client = server->client,
5138fde0 1456 .rpc_message = &msg,
c970aa85
TM		 1457 .callback_ops = &nfs4_open_ops,
1458 .callback_data = data,
101070ca 1459 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1460 .flags = RPC_TASK_ASYNC,
1461 };
24ac23ab
TM		 1462 int status;
1463
c6d00e63 1464 kref_get(&data->kref);
3e309914
TM		 1465 data->rpc_done = 0;
1466 data->rpc_status = 0;
2ced46c2 1467 data->cancelled = 0;
b257957e
AB		 1468 if (isrecover)
1469 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1470 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1471 if (IS_ERR(task))
1472 return PTR_ERR(task);
1473 status = nfs4_wait_for_completion_rpc_task(task);
1474 if (status != 0) {
1475 data->cancelled = 1;
1476 smp_wmb();
1477 } else
1478 status = data->rpc_status;
1479 rpc_put_task(task);
1480
1481 return status;
1482}
1483
1484static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1485{
1486 struct inode *dir = data->dir->d_inode;
1487 struct nfs_openres *o_res = &data->o_res;
1488 int status;
1489
1490 status = nfs4_run_open_task(data, 1);
1491 if (status != 0 || !data->rpc_done)
1492 return status;
1493
1494 nfs_refresh_inode(dir, o_res->dir_attr);
1495
1496 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1497 status = _nfs4_proc_open_confirm(data);
1498 if (status != 0)
1499 return status;
1500 }
1501
1502 return status;
1503}
1504
1505/*
1506 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1507 */
1508static int _nfs4_proc_open(struct nfs4_opendata *data)
1509{
1510 struct inode *dir = data->dir->d_inode;
1511 struct nfs_server *server = NFS_SERVER(dir);
1512 struct nfs_openargs *o_arg = &data->o_arg;
1513 struct nfs_openres *o_res = &data->o_res;
1514 int status;
1515
1516 status = nfs4_run_open_task(data, 0);
3e309914 1517 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1518 return status;
1519
56ae19f3
TM		 1520 if (o_arg->open_flags & O_CREAT) {
1521 update_changeattr(dir, &o_res->cinfo);
1522 nfs_post_op_update_inode(dir, o_res->dir_attr);
1523 } else
1524 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1525 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1526 status = _nfs4_proc_open_confirm(data);
1da177e4 1527 if (status != 0)
24ac23ab 1528 return status;
1da177e4
LT		 1529 }
1530 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1531 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1532 return 0;
1da177e4
LT		 1533}
1534
10afec90 1535static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1536{
7539bbab 1537 struct nfs_client *clp = server->nfs_client;
a78cb57a 1538 unsigned int loop;
6b30954e 1539 int ret;
58d9714a 1540
a78cb57a 1541 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1542 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1543 if (ret != 0)
a78cb57a 1544 break;
e598d843
TM		 1545 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1546 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1547 break;
58d9714a 1548 nfs4_schedule_state_recovery(clp);
a78cb57a 1549 ret = -EIO;
6b30954e 1550 }
a78cb57a 1551 return ret;
58d9714a
TM		 1552}
1553
1da177e4
LT		 1554/*
1555 * OPEN_EXPIRED:
1556 * reclaim state on the server after a network partition.
1557 * Assumes caller holds the appropriate lock
1558 */
539cd03a 1559static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1560{
e56e0b78 1561 struct nfs4_opendata *opendata;
864472e9 1562 int ret;
1da177e4 1563
6f220ed5
TM		 1564 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1565 if (IS_ERR(opendata))
1566 return PTR_ERR(opendata);
864472e9 1567 ret = nfs4_open_recover(opendata, state);
35d05778 1568 if (ret == -ESTALE)
539cd03a 1569 d_drop(ctx->path.dentry);
c6d00e63 1570 nfs4_opendata_put(opendata);
864472e9 1571 return ret;
1da177e4
LT		 1572}
1573
a9ed2e25 1574static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1575{
539cd03a 1576 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1577 struct nfs4_exception exception = { };
1578 int err;
1579
1580 do {
539cd03a 1581 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1582 switch (err) {
1583 default:
1584 goto out;
1585 case -NFS4ERR_GRACE:
1586 case -NFS4ERR_DELAY:
2c643488 1587 case -EKEYEXPIRED:
a9ed2e25
TM		 1588 nfs4_handle_exception(server, err, &exception);
1589 err = 0;
1590 }
202b50dc 1591 } while (exception.retry);
a9ed2e25 1592out:
202b50dc
TM		 1593 return err;
1594}
1595
1da177e4
LT		 1596static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1597{
1da177e4 1598 struct nfs_open_context *ctx;
864472e9 1599 int ret;
1da177e4 1600
864472e9
TM		 1601 ctx = nfs4_state_find_open_context(state);
1602 if (IS_ERR(ctx))
1603 return PTR_ERR(ctx);
539cd03a 1604 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1605 put_nfs_open_context(ctx);
1606 return ret;
1da177e4
LT		 1607}
1608
aa53ed54
JL		 1609/*
1610 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1611 * fields corresponding to attributes that were used to store the verifier.
1612 * Make sure we clobber those fields in the later setattr call
1613 */
1614static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1615{
1616 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1617 !(sattr->ia_valid & ATTR_ATIME_SET))
1618 sattr->ia_valid |= ATTR_ATIME;
1619
1620 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1621 !(sattr->ia_valid & ATTR_MTIME_SET))
1622 sattr->ia_valid |= ATTR_MTIME;
1623}
1624
1da177e4 1625/*
24ac23ab 1626 * Returns a referenced nfs4_state
1da177e4 1627 */
dc0b027d 1628static 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		 1629{
1630 struct nfs4_state_owner *sp;
1631 struct nfs4_state *state = NULL;
1632 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1633 struct nfs4_opendata *opendata;
aac00a8d 1634 int status;
1da177e4
LT		 1635
1636 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1637 status = -ENOMEM;
1638 if (!(sp = nfs4_get_state_owner(server, cred))) {
1639 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1640 goto out_err;
1641 }
58d9714a
TM		 1642 status = nfs4_recover_expired_lease(server);
1643 if (status != 0)
b4454fe1 1644 goto err_put_state_owner;
aac00a8d 1645 if (path->dentry->d_inode != NULL)
dc0b027d 1646 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1647 status = -ENOMEM;
dc0b027d 1648 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1649 if (opendata == NULL)
95d35cb4 1650 goto err_put_state_owner;
1da177e4 1651
aac00a8d
TM		 1652 if (path->dentry->d_inode != NULL)
1653 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1654
24ac23ab 1655 status = _nfs4_proc_open(opendata);
1da177e4 1656 if (status != 0)
c6d00e63 1657 goto err_opendata_put;
1da177e4 1658
aa53ed54
JL		 1659 if (opendata->o_arg.open_flags & O_EXCL)
1660 nfs4_exclusive_attrset(opendata, sattr);
1661
24ac23ab 1662 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1663 status = PTR_ERR(state);
1664 if (IS_ERR(state))
c6d00e63 1665 goto err_opendata_put;
8e469ebd
TM		 1666 if ((opendata->o_res.rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) != 0)
1667 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
c6d00e63 1668 nfs4_opendata_put(opendata);
1da177e4 1669 nfs4_put_state_owner(sp);
1da177e4
LT		 1670 *res = state;
1671 return 0;
c6d00e63
TM		 1672err_opendata_put:
1673 nfs4_opendata_put(opendata);
e56e0b78
TM		 1674err_put_state_owner:
1675 nfs4_put_state_owner(sp);
1da177e4 1676out_err:
1da177e4
LT		 1677 *res = NULL;
1678 return status;
1679}
1680
1681
dc0b027d 1682static 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		 1683{
1684 struct nfs4_exception exception = { };
1685 struct nfs4_state *res;
1686 int status;
1687
1688 do {
dc0b027d 1689 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1690 if (status == 0)
1691 break;
1692 /* NOTE: BAD_SEQID means the server and client disagree about the
1693 * book-keeping w.r.t. state-changing operations
1694 * (OPEN/CLOSE/LOCK/LOCKU...)
1695 * It is actually a sign of a bug on the client or on the server.
1696 *
1697 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1698 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1699 * have unhashed the old state_owner for us, and that we can
1700 * therefore safely retry using a new one. We should still warn
1701 * the user though...
1702 */
1703 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1704 printk(KERN_WARNING "NFS: v4 server %s "
1705 " returned a bad sequence-id error!\n",
1706 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1707 exception.retry = 1;
1708 continue;
1709 }
550f5747
TM		 1710 /*
1711 * BAD_STATEID on OPEN means that the server cancelled our
1712 * state before it received the OPEN_CONFIRM.
1713 * Recover by retrying the request as per the discussion
1714 * on Page 181 of RFC3530.
1715 */
1716 if (status == -NFS4ERR_BAD_STATEID) {
1717 exception.retry = 1;
1718 continue;
1719 }
aac00a8d
TM		 1720 if (status == -EAGAIN) {
1721 /* We must have found a delegation */
1722 exception.retry = 1;
1723 continue;
1724 }
1da177e4
LT		 1725 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1726 status, &exception));
1727 } while (exception.retry);
1728 return res;
1729}
1730
659bfcd6
TM		 1731static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1732 struct nfs_fattr *fattr, struct iattr *sattr,
1733 struct nfs4_state *state)
1da177e4 1734{
3e4f6290 1735 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1736 struct nfs_setattrargs arg = {
3e4f6290 1737 .fh = NFS_FH(inode),
1da177e4
LT		 1738 .iap = sattr,
1739 .server = server,
1740 .bitmask = server->attr_bitmask,
1741 };
1742 struct nfs_setattrres res = {
1743 .fattr = fattr,
1744 .server = server,
1745 };
1746 struct rpc_message msg = {
659bfcd6
TM		 1747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1748 .rpc_argp = &arg,
1749 .rpc_resp = &res,
1750 .rpc_cred = cred,
1da177e4 1751 };
26e976a8 1752 unsigned long timestamp = jiffies;
65e4308d 1753 int status;
1da177e4 1754
0e574af1 1755 nfs_fattr_init(fattr);
1da177e4 1756
3e4f6290
TM		 1757 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1758 /* Use that stateid */
1759 } else if (state != NULL) {
08e9eac4
TM		 1760 nfs4_copy_stateid(&arg.stateid, state, current->files);
1761 } else
1da177e4
LT		 1762 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1763
cccef3b9 1764 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1765 if (status == 0 && state != NULL)
1766 renew_lease(server, timestamp);
65e4308d 1767 return status;
1da177e4
LT		 1768}
1769
659bfcd6
TM		 1770static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1771 struct nfs_fattr *fattr, struct iattr *sattr,
1772 struct nfs4_state *state)
1da177e4 1773{
3e4f6290 1774 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1775 struct nfs4_exception exception = { };
1776 int err;
1777 do {
1778 err = nfs4_handle_exception(server,
659bfcd6 1779 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1780 &exception);
1781 } while (exception.retry);
1782 return err;
1783}
1784
1785struct nfs4_closedata {
4a35bd41 1786 struct path path;
1da177e4
LT		 1787 struct inode *inode;
1788 struct nfs4_state *state;
1789 struct nfs_closeargs arg;
1790 struct nfs_closeres res;
516a6af6 1791 struct nfs_fattr fattr;
26e976a8 1792 unsigned long timestamp;
1da177e4
LT		 1793};
1794
963d8fe5 1795static void nfs4_free_closedata(void *data)
9512135d 1796{
963d8fe5
TM		 1797 struct nfs4_closedata *calldata = data;
1798 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1799
1800 nfs4_put_open_state(calldata->state);
1801 nfs_free_seqid(calldata->arg.seqid);
9512135d 1802 nfs4_put_state_owner(sp);
31f31db1 1803 path_put(&calldata->path);
9512135d
TM		 1804 kfree(calldata);
1805}
1806
88069f77
TM		 1807static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1808 fmode_t fmode)
1809{
1810 spin_lock(&state->owner->so_lock);
1811 if (!(fmode & FMODE_READ))
1812 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1813 if (!(fmode & FMODE_WRITE))
1814 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1815 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1816 spin_unlock(&state->owner->so_lock);
1817}
1818
963d8fe5 1819static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1820{
963d8fe5 1821 struct nfs4_closedata *calldata = data;
1da177e4 1822 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1823 struct nfs_server *server = NFS_SERVER(calldata->inode);
1824
19ddab06 1825 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1826 if (RPC_ASSASSINATED(task))
1827 return;
1da177e4
LT		 1828 /* hmm. we are done with the inode, and in the process of freeing
1829 * the state_owner. we keep this around to process errors
1830 */
1da177e4
LT		 1831 switch (task->tk_status) {
1832 case 0:
45328c35 1833 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1834 renew_lease(server, calldata->timestamp);
88069f77
TM		 1835 nfs4_close_clear_stateid_flags(state,
1836 calldata->arg.fmode);
1da177e4
LT		 1837 break;
1838 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1839 case -NFS4ERR_OLD_STATEID:
1840 case -NFS4ERR_BAD_STATEID:
1da177e4 1841 case -NFS4ERR_EXPIRED:
dc0b027d 1842 if (calldata->arg.fmode == 0)
9e33bed5 1843 break;
1da177e4 1844 default:
72211dbe
TM		 1845 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1846 rpc_restart_call_prepare(task);
1da177e4 1847 }
72211dbe 1848 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1849 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1850}
1851
4ce70ada 1852static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1853{
4ce70ada 1854 struct nfs4_closedata *calldata = data;
9512135d 1855 struct nfs4_state *state = calldata->state;
88069f77 1856 int call_close = 0;
9512135d 1857
963d8fe5 1858 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1859 return;
003707c7 1860
88069f77
TM		 1861 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1862 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1863 spin_lock(&state->owner->so_lock);
003707c7 1864 /* Calculate the change in open mode */
e7616923 1865 if (state->n_rdwr == 0) {
003707c7 1866 if (state->n_rdonly == 0) {
88069f77
TM		 1867 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1868 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1869 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1870 }
1871 if (state->n_wronly == 0) {
88069f77
TM		 1872 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1873 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1874 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1875 }
e7616923 1876 }
4cecb76f 1877 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1878
1879 if (!call_close) {
963d8fe5
TM		 1880 /* Note: exit _without_ calling nfs4_close_done */
1881 task->tk_action = NULL;
9512135d
TM		 1882 return;
1883 }
88069f77
TM		 1884
1885 if (calldata->arg.fmode == 0)
1886 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1887
516a6af6 1888 nfs_fattr_init(calldata->res.fattr);
26e976a8 1889 calldata->timestamp = jiffies;
19ddab06
AA		 1890 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1891 &calldata->arg.seq_args, &calldata->res.seq_res,
1892 1, task))
1893 return;
5138fde0 1894 rpc_call_start(task);
1da177e4
LT		 1895}
1896
963d8fe5 1897static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1898 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1899 .rpc_call_done = nfs4_close_done,
1900 .rpc_release = nfs4_free_closedata,
1901};
1902
1da177e4
LT		 1903/*
1904 * It is possible for data to be read/written from a mem-mapped file
1905 * after the sys_close call (which hits the vfs layer as a flush).
1906 * This means that we can't safely call nfsv4 close on a file until
1907 * the inode is cleared. This in turn means that we are not good
1908 * NFSv4 citizens - we do not indicate to the server to update the file's
1909 * share state even when we are done with one of the three share
1910 * stateid's in the inode.
1911 *
1912 * NOTE: Caller must be holding the sp->so_owner semaphore!
1913 */
a49c3c77 1914int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1915{
4a35bd41 1916 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1917 struct nfs4_closedata *calldata;
b39e625b
TM		 1918 struct nfs4_state_owner *sp = state->owner;
1919 struct rpc_task *task;
5138fde0
TM		 1920 struct rpc_message msg = {
1921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1922 .rpc_cred = state->owner->so_cred,
1923 };
c970aa85
TM		 1924 struct rpc_task_setup task_setup_data = {
1925 .rpc_client = server->client,
5138fde0 1926 .rpc_message = &msg,
c970aa85 1927 .callback_ops = &nfs4_close_ops,
101070ca 1928 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1929 .flags = RPC_TASK_ASYNC,
1930 };
9512135d 1931 int status = -ENOMEM;
1da177e4 1932
19ddab06 1933 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1934 if (calldata == NULL)
9512135d 1935 goto out;
4a35bd41 1936 calldata->inode = state->inode;
1da177e4 1937 calldata->state = state;
4a35bd41 1938 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1939 calldata->arg.stateid = &state->open_stateid;
1da177e4 1940 /* Serialization for the sequence id */
cee54fc9 1941 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1942 if (calldata->arg.seqid == NULL)
1943 goto out_free_calldata;
dc0b027d 1944 calldata->arg.fmode = 0;
a65318bf 1945 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1946 calldata->res.fattr = &calldata->fattr;
c1d51931 1947 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1948 calldata->res.server = server;
5f7dbd5c 1949 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1950 calldata->path.mnt = mntget(path->mnt);
1951 calldata->path.dentry = dget(path->dentry);
9512135d 1952
5138fde0
TM		 1953 msg.rpc_argp = &calldata->arg,
1954 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1955 task_setup_data.callback_data = calldata;
1956 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1957 if (IS_ERR(task))
1958 return PTR_ERR(task);
a49c3c77
TM		 1959 status = 0;
1960 if (wait)
1961 status = rpc_wait_for_completion_task(task);
b39e625b 1962 rpc_put_task(task);
a49c3c77 1963 return status;
9512135d
TM		 1964out_free_calldata:
1965 kfree(calldata);
1966out:
b39e625b
TM		 1967 nfs4_put_open_state(state);
1968 nfs4_put_state_owner(sp);
9512135d 1969 return status;
1da177e4
LT		 1970}
1971
dc0b027d 1972static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1973{
1974 struct file *filp;
1b45c46c 1975 int ret;
02a913a7 1976
1b45c46c 1977 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1978 if (fmode & FMODE_EXEC) {
af22f94a 1979 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1980 state->owner->so_cred,
1981 nd->intent.open.flags);
1982 if (ret < 0)
1983 goto out_close;
1984 }
4a35bd41 1985 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1986 if (!IS_ERR(filp)) {
1987 struct nfs_open_context *ctx;
cd3758e3 1988 ctx = nfs_file_open_context(filp);
02a913a7 1989 ctx->state = state;
95cf959b
TM		 1990 return 0;
1991 }
1b45c46c
TM		 1992 ret = PTR_ERR(filp);
1993out_close:
dc0b027d 1994 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1995 return ret;
02a913a7
TM		 1996}
1997
1998struct dentry *
1da177e4
LT		 1999nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
2000{
ad389da7 2001 struct path path = {
4ac91378 2002 .mnt = nd->path.mnt,
ad389da7
TM		 2003 .dentry = dentry,
2004 };
4ac91378 2005 struct dentry *parent;
1da177e4
LT		 2006 struct iattr attr;
2007 struct rpc_cred *cred;
2008 struct nfs4_state *state;
02a913a7 2009 struct dentry *res;
dc0b027d 2010 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2011
2012 if (nd->flags & LOOKUP_CREATE) {
2013 attr.ia_mode = nd->intent.open.create_mode;
2014 attr.ia_valid = ATTR_MODE;
2015 if (!IS_POSIXACL(dir))
ce3b0f8d 2016 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2017 } else {
2018 attr.ia_valid = 0;
2019 BUG_ON(nd->intent.open.flags & O_CREAT);
2020 }
2021
98a8e323 2022 cred = rpc_lookup_cred();
1da177e4 2023 if (IS_ERR(cred))
02a913a7 2024 return (struct dentry *)cred;
565277f6
TM		 2025 parent = dentry->d_parent;
2026 /* Protect against concurrent sillydeletes */
2027 nfs_block_sillyrename(parent);
dc0b027d 2028 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2029 put_rpccred(cred);
02a913a7 2030 if (IS_ERR(state)) {
d75340cc 2031 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2032 d_add(dentry, NULL);
d75340cc
TM		 2033 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2034 }
565277f6 2035 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2036 return (struct dentry *)state;
2037 }
24ac23ab 2038 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2039 if (res != NULL)
deee9369 2040 path.dentry = res;
d75340cc 2041 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2042 nfs_unblock_sillyrename(parent);
dc0b027d 2043 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2044 return res;
1da177e4
LT		 2045}
2046
2047int
02a913a7 2048nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2049{
ad389da7 2050 struct path path = {
4ac91378 2051 .mnt = nd->path.mnt,
ad389da7
TM		 2052 .dentry = dentry,
2053 };
1da177e4
LT		 2054 struct rpc_cred *cred;
2055 struct nfs4_state *state;
dc0b027d 2056 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2057
98a8e323 2058 cred = rpc_lookup_cred();
1da177e4
LT		 2059 if (IS_ERR(cred))
2060 return PTR_ERR(cred);
dc0b027d 2061 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2062 put_rpccred(cred);
02a913a7
TM		 2063 if (IS_ERR(state)) {
2064 switch (PTR_ERR(state)) {
2065 case -EPERM:
2066 case -EACCES:
2067 case -EDQUOT:
2068 case -ENOSPC:
2069 case -EROFS:
2070 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
2071 return 1;
b87c0adf
CL		 2072 default:
2073 goto out_drop;
02a913a7 2074 }
02a913a7 2075 }
24ac23ab 2076 if (state->inode == dentry->d_inode) {
d75340cc 2077 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2078 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2079 return 1;
2080 }
dc0b027d 2081 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2082out_drop:
2083 d_drop(dentry);
1da177e4
LT		 2084 return 0;
2085}
2086
1185a552 2087static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2088{
2089 if (ctx->state == NULL)
2090 return;
2091 if (is_sync)
2092 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2093 else
2094 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2095}
1da177e4
LT		 2096
2097static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2098{
43652ad5
BH		 2099 struct nfs4_server_caps_arg args = {
2100 .fhandle = fhandle,
2101 };
1da177e4
LT		 2102 struct nfs4_server_caps_res res = {};
2103 struct rpc_message msg = {
2104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2105 .rpc_argp = &args,
1da177e4
LT		 2106 .rpc_resp = &res,
2107 };
2108 int status;
2109
cccef3b9 2110 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2111 if (status == 0) {
2112 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2113 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2114 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2115 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2116 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2117 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2118 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2119 server->caps |= NFS_CAP_ACLS;
2120 if (res.has_links != 0)
2121 server->caps |= NFS_CAP_HARDLINKS;
2122 if (res.has_symlinks != 0)
2123 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2124 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2125 server->caps |= NFS_CAP_FILEID;
2126 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2127 server->caps |= NFS_CAP_MODE;
2128 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2129 server->caps |= NFS_CAP_NLINK;
2130 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2131 server->caps |= NFS_CAP_OWNER;
2132 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2133 server->caps |= NFS_CAP_OWNER_GROUP;
2134 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2135 server->caps |= NFS_CAP_ATIME;
2136 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2137 server->caps |= NFS_CAP_CTIME;
2138 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2139 server->caps |= NFS_CAP_MTIME;
2140
a65318bf
TM		 2141 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2142 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2143 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2144 server->acl_bitmask = res.acl_bitmask;
2145 }
cccef3b9 2146
1da177e4
LT		 2147 return status;
2148}
2149
55a97593 2150int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2151{
2152 struct nfs4_exception exception = { };
2153 int err;
2154 do {
2155 err = nfs4_handle_exception(server,
2156 _nfs4_server_capabilities(server, fhandle),
2157 &exception);
2158 } while (exception.retry);
2159 return err;
2160}
2161
2162static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2163 struct nfs_fsinfo *info)
2164{
1da177e4
LT		 2165 struct nfs4_lookup_root_arg args = {
2166 .bitmask = nfs4_fattr_bitmap,
2167 };
2168 struct nfs4_lookup_res res = {
2169 .server = server,
0e574af1 2170 .fattr = info->fattr,
1da177e4
LT		 2171 .fh = fhandle,
2172 };
2173 struct rpc_message msg = {
2174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2175 .rpc_argp = &args,
2176 .rpc_resp = &res,
2177 };
008f55d0 2178
0e574af1 2179 nfs_fattr_init(info->fattr);
fccba804 2180 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2181}
2182
2183static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2184 struct nfs_fsinfo *info)
2185{
2186 struct nfs4_exception exception = { };
2187 int err;
2188 do {
2189 err = nfs4_handle_exception(server,
2190 _nfs4_lookup_root(server, fhandle, info),
2191 &exception);
2192 } while (exception.retry);
2193 return err;
2194}
2195
54ceac45
DH		 2196/*
2197 * get the file handle for the "/" directory on the server
2198 */
1da177e4 2199static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2200 struct nfs_fsinfo *info)
1da177e4 2201{
1da177e4
LT		 2202 int status;
2203
1da177e4 2204 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2205 if (status == 0)
2206 status = nfs4_server_capabilities(server, fhandle);
2207 if (status == 0)
2208 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2209 return nfs4_map_errors(status);
1da177e4
LT		 2210}
2211
6b97fd3d
MN		 2212/*
2213 * Get locations and (maybe) other attributes of a referral.
2214 * Note that we'll actually follow the referral later when
2215 * we detect fsid mismatch in inode revalidation
2216 */
56659e99 2217static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2218{
2219 int status = -ENOMEM;
2220 struct page *page = NULL;
2221 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2222
2223 page = alloc_page(GFP_KERNEL);
2224 if (page == NULL)
2225 goto out;
2226 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2227 if (locations == NULL)
2228 goto out;
2229
c228fd3a 2230 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2231 if (status != 0)
2232 goto out;
2233 /* Make sure server returned a different fsid for the referral */
2234 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2235 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2236 status = -EIO;
2237 goto out;
2238 }
2239
2240 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2241 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2242 if (!fattr->mode)
2243 fattr->mode = S_IFDIR;
2244 memset(fhandle, 0, sizeof(struct nfs_fh));
2245out:
2246 if (page)
2247 __free_page(page);
2248 if (locations)
2249 kfree(locations);
2250 return status;
2251}
2252
1da177e4
LT		 2253static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2254{
2255 struct nfs4_getattr_arg args = {
2256 .fh = fhandle,
2257 .bitmask = server->attr_bitmask,
2258 };
2259 struct nfs4_getattr_res res = {
2260 .fattr = fattr,
2261 .server = server,
2262 };
2263 struct rpc_message msg = {
2264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2265 .rpc_argp = &args,
2266 .rpc_resp = &res,
2267 };
2268
0e574af1 2269 nfs_fattr_init(fattr);
cccef3b9 2270 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2271}
2272
2273static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2274{
2275 struct nfs4_exception exception = { };
2276 int err;
2277 do {
2278 err = nfs4_handle_exception(server,
2279 _nfs4_proc_getattr(server, fhandle, fattr),
2280 &exception);
2281 } while (exception.retry);
2282 return err;
2283}
2284
2285/*
2286 * The file is not closed if it is opened due to the a request to change
2287 * the size of the file. The open call will not be needed once the
2288 * VFS layer lookup-intents are implemented.
2289 *
2290 * Close is called when the inode is destroyed.
2291 * If we haven't opened the file for O_WRONLY, we
2292 * need to in the size_change case to obtain a stateid.
2293 *
2294 * Got race?
2295 * Because OPEN is always done by name in nfsv4, it is
2296 * possible that we opened a different file by the same
2297 * name. We can recognize this race condition, but we
2298 * can't do anything about it besides returning an error.
2299 *
2300 * This will be fixed with VFS changes (lookup-intent).
2301 */
2302static int
2303nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2304 struct iattr *sattr)
2305{
08e9eac4 2306 struct inode *inode = dentry->d_inode;
659bfcd6 2307 struct rpc_cred *cred = NULL;
d530838b 2308 struct nfs4_state *state = NULL;
1da177e4
LT		 2309 int status;
2310
0e574af1 2311 nfs_fattr_init(fattr);
1da177e4 2312
d530838b 2313 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2314 if (sattr->ia_valid & ATTR_FILE) {
2315 struct nfs_open_context *ctx;
2316
2317 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2318 if (ctx) {
2319 cred = ctx->cred;
2320 state = ctx->state;
2321 }
659bfcd6 2322 }
08e9eac4 2323
659bfcd6 2324 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2325 if (status == 0)
2326 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2327 return status;
2328}
2329
56659e99
TM		 2330static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2331 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2332 struct nfs_fattr *fattr)
2333{
2334 int status;
2335 struct nfs4_lookup_arg args = {
2336 .bitmask = server->attr_bitmask,
2337 .dir_fh = dirfh,
2338 .name = name,
2339 };
2340 struct nfs4_lookup_res res = {
2341 .server = server,
2342 .fattr = fattr,
2343 .fh = fhandle,
2344 };
2345 struct rpc_message msg = {
2346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2347 .rpc_argp = &args,
2348 .rpc_resp = &res,
2349 };
2350
2351 nfs_fattr_init(fattr);
2352
2353 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2354 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2355 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2356 return status;
2357}
2358
2359static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2360 struct qstr *name, struct nfs_fh *fhandle,
2361 struct nfs_fattr *fattr)
2362{
2363 struct nfs4_exception exception = { };
2364 int err;
2365 do {
4e56e082
TM		 2366 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2367 /* FIXME: !!!! */
2368 if (err == -NFS4ERR_MOVED) {
2369 err = -EREMOTE;
2370 break;
2371 }
2372 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2373 } while (exception.retry);
2374 return err;
2375}
2376
56659e99 2377static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2378 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2379{
4e56e082 2380 int status;
1da177e4
LT		 2381
2382 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2383 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2384 if (status == -NFS4ERR_MOVED)
2385 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2386 dprintk("NFS reply lookup: %d\n", status);
2387 return status;
2388}
2389
2390static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2391{
2392 struct nfs4_exception exception = { };
2393 int err;
2394 do {
2395 err = nfs4_handle_exception(NFS_SERVER(dir),
2396 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2397 &exception);
2398 } while (exception.retry);
2399 return err;
2400}
2401
2402static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2403{
76b32999
TM		 2404 struct nfs_server *server = NFS_SERVER(inode);
2405 struct nfs_fattr fattr;
1da177e4
LT		 2406 struct nfs4_accessargs args = {
2407 .fh = NFS_FH(inode),
76b32999
TM		 2408 .bitmask = server->attr_bitmask,
2409 };
2410 struct nfs4_accessres res = {
2411 .server = server,
2412 .fattr = &fattr,
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 }
76b32999 2439 nfs_fattr_init(&fattr);
cccef3b9 2440 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2441 if (!status) {
2442 entry->mask = 0;
2443 if (res.access & NFS4_ACCESS_READ)
2444 entry->mask |= MAY_READ;
2445 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2446 entry->mask |= MAY_WRITE;
2447 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2448 entry->mask |= MAY_EXEC;
76b32999 2449 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2450 }
2451 return status;
2452}
2453
2454static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2455{
2456 struct nfs4_exception exception = { };
2457 int err;
2458 do {
2459 err = nfs4_handle_exception(NFS_SERVER(inode),
2460 _nfs4_proc_access(inode, entry),
2461 &exception);
2462 } while (exception.retry);
2463 return err;
2464}
2465
2466/*
2467 * TODO: For the time being, we don't try to get any attributes
2468 * along with any of the zero-copy operations READ, READDIR,
2469 * READLINK, WRITE.
2470 *
2471 * In the case of the first three, we want to put the GETATTR
2472 * after the read-type operation -- this is because it is hard
2473 * to predict the length of a GETATTR response in v4, and thus
2474 * align the READ data correctly. This means that the GETATTR
2475 * may end up partially falling into the page cache, and we should
2476 * shift it into the 'tail' of the xdr_buf before processing.
2477 * To do this efficiently, we need to know the total length
2478 * of data received, which doesn't seem to be available outside
2479 * of the RPC layer.
2480 *
2481 * In the case of WRITE, we also want to put the GETATTR after
2482 * the operation -- in this case because we want to make sure
2483 * we get the post-operation mtime and size. This means that
2484 * we can't use xdr_encode_pages() as written: we need a variant
2485 * of it which would leave room in the 'tail' iovec.
2486 *
2487 * Both of these changes to the XDR layer would in fact be quite
2488 * minor, but I decided to leave them for a subsequent patch.
2489 */
2490static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2491 unsigned int pgbase, unsigned int pglen)
2492{
2493 struct nfs4_readlink args = {
2494 .fh = NFS_FH(inode),
2495 .pgbase = pgbase,
2496 .pglen = pglen,
2497 .pages = &page,
2498 };
f50c7000 2499 struct nfs4_readlink_res res;
1da177e4
LT		 2500 struct rpc_message msg = {
2501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2502 .rpc_argp = &args,
f50c7000 2503 .rpc_resp = &res,
1da177e4
LT		 2504 };
2505
cccef3b9 2506 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2507}
2508
2509static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2510 unsigned int pgbase, unsigned int pglen)
2511{
2512 struct nfs4_exception exception = { };
2513 int err;
2514 do {
2515 err = nfs4_handle_exception(NFS_SERVER(inode),
2516 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2517 &exception);
2518 } while (exception.retry);
2519 return err;
2520}
2521
1da177e4
LT		 2522/*
2523 * Got race?
2524 * We will need to arrange for the VFS layer to provide an atomic open.
2525 * Until then, this create/open method is prone to inefficiency and race
2526 * conditions due to the lookup, create, and open VFS calls from sys_open()
2527 * placed on the wire.
2528 *
2529 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2530 * The file will be opened again in the subsequent VFS open call
2531 * (nfs4_proc_file_open).
2532 *
2533 * The open for read will just hang around to be used by any process that
2534 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2535 */
2536
2537static int
2538nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2539 int flags, struct nameidata *nd)
1da177e4 2540{
ad389da7 2541 struct path path = {
4ac91378 2542 .mnt = nd->path.mnt,
ad389da7
TM		 2543 .dentry = dentry,
2544 };
1da177e4
LT		 2545 struct nfs4_state *state;
2546 struct rpc_cred *cred;
dc0b027d 2547 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2548 int status = 0;
2549
98a8e323 2550 cred = rpc_lookup_cred();
1da177e4
LT		 2551 if (IS_ERR(cred)) {
2552 status = PTR_ERR(cred);
2553 goto out;
2554 }
dc0b027d 2555 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2556 d_drop(dentry);
1da177e4
LT		 2557 if (IS_ERR(state)) {
2558 status = PTR_ERR(state);
659bfcd6 2559 goto out_putcred;
1da177e4 2560 }
d4d9cdcb 2561 d_add(dentry, igrab(state->inode));
d75340cc 2562 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2563 if (flags & O_EXCL) {
2564 struct nfs_fattr fattr;
659bfcd6 2565 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2566 if (status == 0)
65e4308d 2567 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2568 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2569 }
ad389da7 2570 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2571 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2572 else
dc0b027d 2573 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2574out_putcred:
2575 put_rpccred(cred);
1da177e4
LT		 2576out:
2577 return status;
2578}
2579
2580static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2581{
16e42959 2582 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2583 struct nfs_removeargs args = {
1da177e4 2584 .fh = NFS_FH(dir),
4fdc17b2
TM		 2585 .name.len = name->len,
2586 .name.name = name->name,
16e42959
TM		 2587 .bitmask = server->attr_bitmask,
2588 };
4fdc17b2 2589 struct nfs_removeres res = {
16e42959 2590 .server = server,
1da177e4 2591 };
1da177e4 2592 struct rpc_message msg = {
4fdc17b2
TM		 2593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2594 .rpc_argp = &args,
2595 .rpc_resp = &res,
1da177e4
LT		 2596 };
2597 int status;
2598
4fdc17b2 2599 nfs_fattr_init(&res.dir_attr);
cccef3b9 2600 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2601 if (status == 0) {
2602 update_changeattr(dir, &res.cinfo);
4fdc17b2 2603 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2604 }
1da177e4
LT		 2605 return status;
2606}
2607
2608static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2609{
2610 struct nfs4_exception exception = { };
2611 int err;
2612 do {
2613 err = nfs4_handle_exception(NFS_SERVER(dir),
2614 _nfs4_proc_remove(dir, name),
2615 &exception);
2616 } while (exception.retry);
2617 return err;
2618}
2619
e4eff1a6 2620static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2621{
e4eff1a6
TM		 2622 struct nfs_server *server = NFS_SERVER(dir);
2623 struct nfs_removeargs *args = msg->rpc_argp;
2624 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2625
a65318bf 2626 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2627 res->server = server;
1da177e4 2628 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2629}
2630
e4eff1a6 2631static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2632{
e4eff1a6
TM		 2633 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2634
472cfbd9 2635 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2636 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2637 return 0;
2638 update_changeattr(dir, &res->cinfo);
2639 nfs_post_op_update_inode(dir, &res->dir_attr);
2640 return 1;
1da177e4
LT		 2641}
2642
2643static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2644 struct inode *new_dir, struct qstr *new_name)
2645{
6caf2c82 2646 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2647 struct nfs4_rename_arg arg = {
2648 .old_dir = NFS_FH(old_dir),
2649 .new_dir = NFS_FH(new_dir),
2650 .old_name = old_name,
2651 .new_name = new_name,
6caf2c82
TM		 2652 .bitmask = server->attr_bitmask,
2653 };
2654 struct nfs_fattr old_fattr, new_fattr;
2655 struct nfs4_rename_res res = {
2656 .server = server,
2657 .old_fattr = &old_fattr,
2658 .new_fattr = &new_fattr,
1da177e4 2659 };
1da177e4
LT		 2660 struct rpc_message msg = {
2661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2662 .rpc_argp = &arg,
2663 .rpc_resp = &res,
2664 };
2665 int status;
2666
6caf2c82
TM		 2667 nfs_fattr_init(res.old_fattr);
2668 nfs_fattr_init(res.new_fattr);
cccef3b9 2669 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2670
2671 if (!status) {
2672 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2673 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2674 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2675 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2676 }
2677 return status;
2678}
2679
2680static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2681 struct inode *new_dir, struct qstr *new_name)
2682{
2683 struct nfs4_exception exception = { };
2684 int err;
2685 do {
2686 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2687 _nfs4_proc_rename(old_dir, old_name,
2688 new_dir, new_name),
2689 &exception);
2690 } while (exception.retry);
2691 return err;
2692}
2693
2694static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2695{
91ba2eee 2696 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2697 struct nfs4_link_arg arg = {
2698 .fh = NFS_FH(inode),
2699 .dir_fh = NFS_FH(dir),
2700 .name = name,
91ba2eee
TM		 2701 .bitmask = server->attr_bitmask,
2702 };
2703 struct nfs_fattr fattr, dir_attr;
2704 struct nfs4_link_res res = {
2705 .server = server,
2706 .fattr = &fattr,
2707 .dir_attr = &dir_attr,
1da177e4 2708 };
1da177e4
LT		 2709 struct rpc_message msg = {
2710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2711 .rpc_argp = &arg,
91ba2eee 2712 .rpc_resp = &res,
1da177e4
LT		 2713 };
2714 int status;
2715
91ba2eee
TM		 2716 nfs_fattr_init(res.fattr);
2717 nfs_fattr_init(res.dir_attr);
cccef3b9 2718 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2719 if (!status) {
2720 update_changeattr(dir, &res.cinfo);
2721 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2722 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2723 }
1da177e4
LT		 2724
2725 return status;
2726}
2727
2728static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2729{
2730 struct nfs4_exception exception = { };
2731 int err;
2732 do {
2733 err = nfs4_handle_exception(NFS_SERVER(inode),
2734 _nfs4_proc_link(inode, dir, name),
2735 &exception);
2736 } while (exception.retry);
2737 return err;
2738}
2739
57dc9a57
TM		 2740struct nfs4_createdata {
2741 struct rpc_message msg;
2742 struct nfs4_create_arg arg;
2743 struct nfs4_create_res res;
2744 struct nfs_fh fh;
2745 struct nfs_fattr fattr;
2746 struct nfs_fattr dir_fattr;
2747};
2748
2749static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2750 struct qstr *name, struct iattr *sattr, u32 ftype)
2751{
2752 struct nfs4_createdata *data;
2753
2754 data = kzalloc(sizeof(*data), GFP_KERNEL);
2755 if (data != NULL) {
2756 struct nfs_server *server = NFS_SERVER(dir);
2757
2758 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2759 data->msg.rpc_argp = &data->arg;
2760 data->msg.rpc_resp = &data->res;
2761 data->arg.dir_fh = NFS_FH(dir);
2762 data->arg.server = server;
2763 data->arg.name = name;
2764 data->arg.attrs = sattr;
2765 data->arg.ftype = ftype;
2766 data->arg.bitmask = server->attr_bitmask;
2767 data->res.server = server;
2768 data->res.fh = &data->fh;
2769 data->res.fattr = &data->fattr;
2770 data->res.dir_fattr = &data->dir_fattr;
2771 nfs_fattr_init(data->res.fattr);
2772 nfs_fattr_init(data->res.dir_fattr);
2773 }
2774 return data;
2775}
2776
2777static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2778{
cccef3b9
AA		 2779 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2780 &data->arg, &data->res, 1);
57dc9a57
TM		 2781 if (status == 0) {
2782 update_changeattr(dir, &data->res.dir_cinfo);
2783 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2784 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2785 }
2786 return status;
2787}
2788
2789static void nfs4_free_createdata(struct nfs4_createdata *data)
2790{
2791 kfree(data);
2792}
2793
4f390c15 2794static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2795 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2796{
57dc9a57
TM		 2797 struct nfs4_createdata *data;
2798 int status = -ENAMETOOLONG;
1da177e4 2799
94a6d753 2800 if (len > NFS4_MAXPATHLEN)
57dc9a57 2801 goto out;
4f390c15 2802
57dc9a57
TM		 2803 status = -ENOMEM;
2804 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2805 if (data == NULL)
2806 goto out;
2807
2808 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2809 data->arg.u.symlink.pages = &page;
2810 data->arg.u.symlink.len = len;
1da177e4 2811
57dc9a57
TM		 2812 status = nfs4_do_create(dir, dentry, data);
2813
2814 nfs4_free_createdata(data);
2815out:
1da177e4
LT		 2816 return status;
2817}
2818
4f390c15 2819static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2820 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2821{
2822 struct nfs4_exception exception = { };
2823 int err;
2824 do {
2825 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2826 _nfs4_proc_symlink(dir, dentry, page,
2827 len, sattr),
1da177e4
LT		 2828 &exception);
2829 } while (exception.retry);
2830 return err;
2831}
2832
2833static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2834 struct iattr *sattr)
2835{
57dc9a57
TM		 2836 struct nfs4_createdata *data;
2837 int status = -ENOMEM;
1da177e4 2838
57dc9a57
TM		 2839 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2840 if (data == NULL)
2841 goto out;
2842
2843 status = nfs4_do_create(dir, dentry, data);
2844
2845 nfs4_free_createdata(data);
2846out:
1da177e4
LT		 2847 return status;
2848}
2849
2850static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2851 struct iattr *sattr)
2852{
2853 struct nfs4_exception exception = { };
2854 int err;
2855 do {
2856 err = nfs4_handle_exception(NFS_SERVER(dir),
2857 _nfs4_proc_mkdir(dir, dentry, sattr),
2858 &exception);
2859 } while (exception.retry);
2860 return err;
2861}
2862
2863static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2864 u64 cookie, struct page *page, unsigned int count, int plus)
2865{
2866 struct inode *dir = dentry->d_inode;
2867 struct nfs4_readdir_arg args = {
2868 .fh = NFS_FH(dir),
2869 .pages = &page,
2870 .pgbase = 0,
2871 .count = count,
96d25e53 2872 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2873 };
2874 struct nfs4_readdir_res res;
2875 struct rpc_message msg = {
2876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2877 .rpc_argp = &args,
2878 .rpc_resp = &res,
2879 .rpc_cred = cred,
2880 };
2881 int status;
2882
3110ff80 2883 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2884 dentry->d_parent->d_name.name,
2885 dentry->d_name.name,
2886 (unsigned long long)cookie);
1da177e4
LT		 2887 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2888 res.pgbase = args.pgbase;
cccef3b9 2889 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2890 if (status == 0)
2891 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2892
2893 nfs_invalidate_atime(dir);
2894
3110ff80 2895 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2896 return status;
2897}
2898
2899static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2900 u64 cookie, struct page *page, unsigned int count, int plus)
2901{
2902 struct nfs4_exception exception = { };
2903 int err;
2904 do {
2905 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2906 _nfs4_proc_readdir(dentry, cred, cookie,
2907 page, count, plus),
2908 &exception);
2909 } while (exception.retry);
2910 return err;
2911}
2912
2913static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2914 struct iattr *sattr, dev_t rdev)
2915{
57dc9a57
TM		 2916 struct nfs4_createdata *data;
2917 int mode = sattr->ia_mode;
2918 int status = -ENOMEM;
1da177e4
LT		 2919
2920 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2921 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2922
2923 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2924 if (data == NULL)
2925 goto out;
2926
1da177e4 2927 if (S_ISFIFO(mode))
57dc9a57 2928 data->arg.ftype = NF4FIFO;
1da177e4 2929 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2930 data->arg.ftype = NF4BLK;
2931 data->arg.u.device.specdata1 = MAJOR(rdev);
2932 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2933 }
2934 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2935 data->arg.ftype = NF4CHR;
2936 data->arg.u.device.specdata1 = MAJOR(rdev);
2937 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2938 }
1da177e4 2939
57dc9a57
TM		 2940 status = nfs4_do_create(dir, dentry, data);
2941
2942 nfs4_free_createdata(data);
2943out:
1da177e4
LT		 2944 return status;
2945}
2946
2947static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2948 struct iattr *sattr, dev_t rdev)
2949{
2950 struct nfs4_exception exception = { };
2951 int err;
2952 do {
2953 err = nfs4_handle_exception(NFS_SERVER(dir),
2954 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2955 &exception);
2956 } while (exception.retry);
2957 return err;
2958}
2959
2960static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2961 struct nfs_fsstat *fsstat)
2962{
2963 struct nfs4_statfs_arg args = {
2964 .fh = fhandle,
2965 .bitmask = server->attr_bitmask,
2966 };
24ad148a
BH		 2967 struct nfs4_statfs_res res = {
2968 .fsstat = fsstat,
2969 };
1da177e4
LT		 2970 struct rpc_message msg = {
2971 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2972 .rpc_argp = &args,
24ad148a 2973 .rpc_resp = &res,
1da177e4
LT		 2974 };
2975
0e574af1 2976 nfs_fattr_init(fsstat->fattr);
cccef3b9 2977 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2978}
2979
2980static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2981{
2982 struct nfs4_exception exception = { };
2983 int err;
2984 do {
2985 err = nfs4_handle_exception(server,
2986 _nfs4_proc_statfs(server, fhandle, fsstat),
2987 &exception);
2988 } while (exception.retry);
2989 return err;
2990}
2991
2992static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2993 struct nfs_fsinfo *fsinfo)
2994{
2995 struct nfs4_fsinfo_arg args = {
2996 .fh = fhandle,
2997 .bitmask = server->attr_bitmask,
2998 };
3dda5e43
BH		 2999 struct nfs4_fsinfo_res res = {
3000 .fsinfo = fsinfo,
3001 };
1da177e4
LT		 3002 struct rpc_message msg = {
3003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3004 .rpc_argp = &args,
3dda5e43 3005 .rpc_resp = &res,
1da177e4
LT		 3006 };
3007
cccef3b9 3008 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3009}
3010
3011static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3012{
3013 struct nfs4_exception exception = { };
3014 int err;
3015
3016 do {
3017 err = nfs4_handle_exception(server,
3018 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3019 &exception);
3020 } while (exception.retry);
3021 return err;
3022}
3023
3024static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3025{
0e574af1 3026 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3027 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3028}
3029
3030static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3031 struct nfs_pathconf *pathconf)
3032{
3033 struct nfs4_pathconf_arg args = {
3034 .fh = fhandle,
3035 .bitmask = server->attr_bitmask,
3036 };
d45b2989
BH		 3037 struct nfs4_pathconf_res res = {
3038 .pathconf = pathconf,
3039 };
1da177e4
LT		 3040 struct rpc_message msg = {
3041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3042 .rpc_argp = &args,
d45b2989 3043 .rpc_resp = &res,
1da177e4
LT		 3044 };
3045
3046 /* None of the pathconf attributes are mandatory to implement */
3047 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3048 memset(pathconf, 0, sizeof(*pathconf));
3049 return 0;
3050 }
3051
0e574af1 3052 nfs_fattr_init(pathconf->fattr);
cccef3b9 3053 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3054}
3055
3056static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3057 struct nfs_pathconf *pathconf)
3058{
3059 struct nfs4_exception exception = { };
3060 int err;
3061
3062 do {
3063 err = nfs4_handle_exception(server,
3064 _nfs4_proc_pathconf(server, fhandle, pathconf),
3065 &exception);
3066 } while (exception.retry);
3067 return err;
3068}
3069
ec06c096 3070static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3071{
ec06c096 3072 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3073
f11c88af
AA		 3074 dprintk("--> %s\n", __func__);
3075
f11c88af
AA		 3076 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3077
9e33bed5 3078 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3079 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3080 return -EAGAIN;
1da177e4 3081 }
8850df99
TM		 3082
3083 nfs_invalidate_atime(data->inode);
1da177e4 3084 if (task->tk_status > 0)
ec06c096
TM		 3085 renew_lease(server, data->timestamp);
3086 return 0;
1da177e4
LT		 3087}
3088
bdc7f021 3089static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3090{
1da177e4 3091 data->timestamp = jiffies;
bdc7f021 3092 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3093}
3094
788e7a89 3095static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3096{
1da177e4
LT		 3097 struct inode *inode = data->inode;
3098
def6ed7e
AA		 3099 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3100 task->tk_status);
3101
9e33bed5 3102 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3103 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3104 return -EAGAIN;
1da177e4 3105 }
4f9838c7 3106 if (task->tk_status >= 0) {
1da177e4 3107 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3108 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3109 }
788e7a89 3110 return 0;
1da177e4
LT		 3111}
3112
bdc7f021 3113static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3114{
bdc7f021
TM		 3115 struct nfs_server *server = NFS_SERVER(data->inode);
3116
a65318bf 3117 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3118 data->res.server = server;
1da177e4
LT		 3119 data->timestamp = jiffies;
3120
bdc7f021 3121 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3122}
3123
788e7a89 3124static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3125{
1da177e4
LT		 3126 struct inode *inode = data->inode;
3127
21d9a851
AA		 3128 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3129 task->tk_status);
9e33bed5 3130 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3131 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3132 return -EAGAIN;
1da177e4 3133 }
9e08a3c5 3134 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3135 return 0;
1da177e4
LT		 3136}
3137
bdc7f021 3138static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3139{
788e7a89 3140 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3141
a65318bf 3142 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3143 data->res.server = server;
bdc7f021 3144 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3145}
3146
3147/*
3148 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3149 * standalone procedure for queueing an asynchronous RENEW.
3150 */
dc96aef9
AB		 3151static void nfs4_renew_release(void *data)
3152{
3153 struct nfs_client *clp = data;
3154
3155 nfs4_schedule_state_renewal(clp);
3156}
3157
963d8fe5 3158static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3159{
dc96aef9
AB		 3160 struct nfs_client *clp = data;
3161 unsigned long timestamp = task->tk_start;
1da177e4
LT		 3162
3163 if (task->tk_status < 0) {
95baa25c
TM		 3164 /* Unless we're shutting down, schedule state recovery! */
3165 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3166 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3167 return;
3168 }
3169 spin_lock(&clp->cl_lock);
3170 if (time_before(clp->cl_last_renewal,timestamp))
3171 clp->cl_last_renewal = timestamp;
3172 spin_unlock(&clp->cl_lock);
3173}
3174
963d8fe5
TM		 3175static const struct rpc_call_ops nfs4_renew_ops = {
3176 .rpc_call_done = nfs4_renew_done,
dc96aef9 3177 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3178};
3179
adfa6f98 3180int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3181{
3182 struct rpc_message msg = {
3183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3184 .rpc_argp = clp,
b4454fe1 3185 .rpc_cred = cred,
1da177e4
LT		 3186 };
3187
3188 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
dc96aef9 3189 &nfs4_renew_ops, clp);
1da177e4
LT		 3190}
3191
adfa6f98 3192int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3193{
3194 struct rpc_message msg = {
3195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3196 .rpc_argp = clp,
b4454fe1 3197 .rpc_cred = cred,
1da177e4
LT		 3198 };
3199 unsigned long now = jiffies;
3200 int status;
3201
3202 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3203 if (status < 0)
3204 return status;
3205 spin_lock(&clp->cl_lock);
3206 if (time_before(clp->cl_last_renewal,now))
3207 clp->cl_last_renewal = now;
3208 spin_unlock(&clp->cl_lock);
3209 return 0;
3210}
3211
aa1870af
BF		 3212static inline int nfs4_server_supports_acls(struct nfs_server *server)
3213{
3214 return (server->caps & NFS_CAP_ACLS)
3215 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3216 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3217}
3218
3219/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3220 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3221 * the stack.
3222 */
3223#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3224
3225static void buf_to_pages(const void *buf, size_t buflen,
3226 struct page **pages, unsigned int *pgbase)
3227{
3228 const void *p = buf;
3229
3230 *pgbase = offset_in_page(buf);
3231 p -= *pgbase;
3232 while (p < buf + buflen) {
3233 *(pages++) = virt_to_page(p);
3234 p += PAGE_CACHE_SIZE;
3235 }
3236}
3237
e50a1c2e
BF		 3238struct nfs4_cached_acl {
3239 int cached;
3240 size_t len;
3e9d4154 3241 char data[0];
e50a1c2e
BF		 3242};
3243
3244static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3245{
3246 struct nfs_inode *nfsi = NFS_I(inode);
3247
3248 spin_lock(&inode->i_lock);
3249 kfree(nfsi->nfs4_acl);
3250 nfsi->nfs4_acl = acl;
3251 spin_unlock(&inode->i_lock);
3252}
3253
3254static void nfs4_zap_acl_attr(struct inode *inode)
3255{
3256 nfs4_set_cached_acl(inode, NULL);
3257}
3258
3259static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3260{
3261 struct nfs_inode *nfsi = NFS_I(inode);
3262 struct nfs4_cached_acl *acl;
3263 int ret = -ENOENT;
3264
3265 spin_lock(&inode->i_lock);
3266 acl = nfsi->nfs4_acl;
3267 if (acl == NULL)
3268 goto out;
3269 if (buf == NULL) /* user is just asking for length */
3270 goto out_len;
3271 if (acl->cached == 0)
3272 goto out;
3273 ret = -ERANGE; /* see getxattr(2) man page */
3274 if (acl->len > buflen)
3275 goto out;
3276 memcpy(buf, acl->data, acl->len);
3277out_len:
3278 ret = acl->len;
3279out:
3280 spin_unlock(&inode->i_lock);
3281 return ret;
3282}
3283
3284static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3285{
3286 struct nfs4_cached_acl *acl;
3287
3288 if (buf && acl_len <= PAGE_SIZE) {
3289 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3290 if (acl == NULL)
3291 goto out;
3292 acl->cached = 1;
3293 memcpy(acl->data, buf, acl_len);
3294 } else {
3295 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3296 if (acl == NULL)
3297 goto out;
3298 acl->cached = 0;
3299 }
3300 acl->len = acl_len;
3301out:
3302 nfs4_set_cached_acl(inode, acl);
3303}
3304
16b4289c 3305static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3306{
aa1870af
BF		 3307 struct page *pages[NFS4ACL_MAXPAGES];
3308 struct nfs_getaclargs args = {
3309 .fh = NFS_FH(inode),
3310 .acl_pages = pages,
3311 .acl_len = buflen,
3312 };
663c79b3
BH		 3313 struct nfs_getaclres res = {
3314 .acl_len = buflen,
3315 };
e50a1c2e 3316 void *resp_buf;
aa1870af
BF		 3317 struct rpc_message msg = {
3318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3319 .rpc_argp = &args,
663c79b3 3320 .rpc_resp = &res,
aa1870af 3321 };
e50a1c2e 3322 struct page *localpage = NULL;
aa1870af
BF		 3323 int ret;
3324
e50a1c2e
BF		 3325 if (buflen < PAGE_SIZE) {
3326 /* As long as we're doing a round trip to the server anyway,
3327 * let's be prepared for a page of acl data. */
3328 localpage = alloc_page(GFP_KERNEL);
3329 resp_buf = page_address(localpage);
3330 if (localpage == NULL)
3331 return -ENOMEM;
3332 args.acl_pages[0] = localpage;
3333 args.acl_pgbase = 0;
663c79b3 3334 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3335 } else {
3336 resp_buf = buf;
3337 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3338 }
cccef3b9 3339 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3340 if (ret)
3341 goto out_free;
663c79b3
BH		 3342 if (res.acl_len > args.acl_len)
3343 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3344 else
663c79b3 3345 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3346 if (buf) {
3347 ret = -ERANGE;
663c79b3 3348 if (res.acl_len > buflen)
e50a1c2e
BF		 3349 goto out_free;
3350 if (localpage)
663c79b3 3351 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3352 }
663c79b3 3353 ret = res.acl_len;
e50a1c2e
BF		 3354out_free:
3355 if (localpage)
3356 __free_page(localpage);
aa1870af
BF		 3357 return ret;
3358}
3359
16b4289c
TM		 3360static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3361{
3362 struct nfs4_exception exception = { };
3363 ssize_t ret;
3364 do {
3365 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3366 if (ret >= 0)
3367 break;
3368 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3369 } while (exception.retry);
3370 return ret;
3371}
3372
e50a1c2e
BF		 3373static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3374{
3375 struct nfs_server *server = NFS_SERVER(inode);
3376 int ret;
3377
3378 if (!nfs4_server_supports_acls(server))
3379 return -EOPNOTSUPP;
3380 ret = nfs_revalidate_inode(server, inode);
3381 if (ret < 0)
3382 return ret;
3383 ret = nfs4_read_cached_acl(inode, buf, buflen);
3384 if (ret != -ENOENT)
3385 return ret;
3386 return nfs4_get_acl_uncached(inode, buf, buflen);
3387}
3388
16b4289c 3389static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3390{
3391 struct nfs_server *server = NFS_SERVER(inode);
3392 struct page *pages[NFS4ACL_MAXPAGES];
3393 struct nfs_setaclargs arg = {
3394 .fh = NFS_FH(inode),
3395 .acl_pages = pages,
3396 .acl_len = buflen,
3397 };
73c403a9 3398 struct nfs_setaclres res;
4b580ee3
BF		 3399 struct rpc_message msg = {
3400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3401 .rpc_argp = &arg,
73c403a9 3402 .rpc_resp = &res,
4b580ee3
BF		 3403 };
3404 int ret;
3405
3406 if (!nfs4_server_supports_acls(server))
3407 return -EOPNOTSUPP;
642ac549 3408 nfs_inode_return_delegation(inode);
4b580ee3 3409 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3410 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3411 nfs_access_zap_cache(inode);
3412 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3413 return ret;
3414}
3415
16b4289c
TM		 3416static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3417{
3418 struct nfs4_exception exception = { };
3419 int err;
3420 do {
3421 err = nfs4_handle_exception(NFS_SERVER(inode),
3422 __nfs4_proc_set_acl(inode, buf, buflen),
3423 &exception);
3424 } while (exception.retry);
3425 return err;
3426}
3427
1da177e4 3428static int
8328d59f 3429_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3430{
1da177e4
LT		 3431 if (!clp || task->tk_status >= 0)
3432 return 0;
3433 switch(task->tk_status) {
9e33bed5
TM		 3434 case -NFS4ERR_ADMIN_REVOKED:
3435 case -NFS4ERR_BAD_STATEID:
3436 case -NFS4ERR_OPENMODE:
3437 if (state == NULL)
3438 break;
3439 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3440 goto do_state_recovery;
1da177e4 3441 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3442 if (state == NULL)
3443 break;
3444 nfs4_state_mark_reclaim_reboot(clp, state);
3445 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3446 case -NFS4ERR_EXPIRED:
a2c0b9e2 3447 goto do_state_recovery;
4745e315
AA		 3448#if defined(CONFIG_NFS_V4_1)
3449 case -NFS4ERR_BADSESSION:
3450 case -NFS4ERR_BADSLOT:
3451 case -NFS4ERR_BAD_HIGH_SLOT:
3452 case -NFS4ERR_DEADSESSION:
3453 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3454 case -NFS4ERR_SEQ_FALSE_RETRY:
3455 case -NFS4ERR_SEQ_MISORDERED:
3456 dprintk("%s ERROR %d, Reset session\n", __func__,
3457 task->tk_status);
0b9e2d41 3458 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3459 task->tk_status = 0;
3460 return -EAGAIN;
3461#endif /* CONFIG_NFS_V4_1 */
1da177e4 3462 case -NFS4ERR_DELAY:
8328d59f
AA		 3463 if (server)
3464 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3465 case -NFS4ERR_GRACE:
2c643488 3466 case -EKEYEXPIRED:
1da177e4
LT		 3467 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3468 task->tk_status = 0;
3469 return -EAGAIN;
3470 case -NFS4ERR_OLD_STATEID:
3471 task->tk_status = 0;
3472 return -EAGAIN;
3473 }
3474 task->tk_status = nfs4_map_errors(task->tk_status);
3475 return 0;
a2c0b9e2
TM		 3476do_state_recovery:
3477 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3478 nfs4_schedule_state_recovery(clp);
3479 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3480 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3481 task->tk_status = 0;
3482 return -EAGAIN;
1da177e4
LT		 3483}
3484
8328d59f
AA		 3485static int
3486nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3487{
3488 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3489}
3490
adfa6f98 3491int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3492{
3493 nfs4_verifier sc_verifier;
3494 struct nfs4_setclientid setclientid = {
3495 .sc_verifier = &sc_verifier,
3496 .sc_prog = program,
3497 };
3498 struct rpc_message msg = {
3499 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3500 .rpc_argp = &setclientid,
3501 .rpc_resp = clp,
286d7d6a 3502 .rpc_cred = cred,
1da177e4 3503 };
bc4785cd 3504 __be32 *p;
1da177e4
LT		 3505 int loop = 0;
3506 int status;
3507
bc4785cd 3508 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3509 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3510 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3511
3512 for(;;) {
3513 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3514 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3515 clp->cl_ipaddr,
3516 rpc_peeraddr2str(clp->cl_rpcclient,
3517 RPC_DISPLAY_ADDR),
69dd716c
TM		 3518 rpc_peeraddr2str(clp->cl_rpcclient,
3519 RPC_DISPLAY_PROTO),
78ea323b 3520 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3521 clp->cl_id_uniquifier);
3522 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3523 sizeof(setclientid.sc_netid),
3524 rpc_peeraddr2str(clp->cl_rpcclient,
3525 RPC_DISPLAY_NETID));
1da177e4 3526 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3527 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3528 clp->cl_ipaddr, port >> 8, port & 255);
3529
3530 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3531 if (status != -NFS4ERR_CLID_INUSE)
3532 break;
3533 if (signalled())
3534 break;
3535 if (loop++ & 1)
3536 ssleep(clp->cl_lease_time + 1);
3537 else
3538 if (++clp->cl_id_uniquifier == 0)
3539 break;
3540 }
3541 return status;
3542}
3543
adfa6f98 3544static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3545{
3546 struct nfs_fsinfo fsinfo;
3547 struct rpc_message msg = {
3548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3549 .rpc_argp = clp,
3550 .rpc_resp = &fsinfo,
286d7d6a 3551 .rpc_cred = cred,
1da177e4
LT		 3552 };
3553 unsigned long now;
3554 int status;
3555
3556 now = jiffies;
3557 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3558 if (status == 0) {
3559 spin_lock(&clp->cl_lock);
3560 clp->cl_lease_time = fsinfo.lease_time * HZ;
3561 clp->cl_last_renewal = now;
3562 spin_unlock(&clp->cl_lock);
3563 }
3564 return status;
3565}
3566
adfa6f98 3567int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3568{
77e03677 3569 long timeout = 0;
51581f3b
TM		 3570 int err;
3571 do {
3572 err = _nfs4_proc_setclientid_confirm(clp, cred);
3573 switch (err) {
3574 case 0:
3575 return err;
3576 case -NFS4ERR_RESOURCE:
3577 /* The IBM lawyers misread another document! */
3578 case -NFS4ERR_DELAY:
2c643488 3579 case -EKEYEXPIRED:
51581f3b
TM		 3580 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3581 }
3582 } while (err == 0);
3583 return err;
3584}
3585
fe650407
TM		 3586struct nfs4_delegreturndata {
3587 struct nfs4_delegreturnargs args;
fa178f29 3588 struct nfs4_delegreturnres res;
fe650407
TM		 3589 struct nfs_fh fh;
3590 nfs4_stateid stateid;
26e976a8 3591 unsigned long timestamp;
fa178f29 3592 struct nfs_fattr fattr;
fe650407
TM		 3593 int rpc_status;
3594};
3595
fe650407
TM		 3596static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3597{
3598 struct nfs4_delegreturndata *data = calldata;
938e1010 3599
d61e612a
TM		 3600 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3601 task->tk_status);
938e1010 3602
79708861
RL		 3603 switch (task->tk_status) {
3604 case -NFS4ERR_STALE_STATEID:
3605 case -NFS4ERR_EXPIRED:
3606 case 0:
fa178f29 3607 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3608 break;
3609 default:
3610 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3611 -EAGAIN) {
3612 nfs_restart_rpc(task, data->res.server->nfs_client);
3613 return;
3614 }
3615 }
3616 data->rpc_status = task->tk_status;
fe650407
TM		 3617}
3618
3619static void nfs4_delegreturn_release(void *calldata)
3620{
fe650407
TM		 3621 kfree(calldata);
3622}
3623
938e1010
AA		 3624#if defined(CONFIG_NFS_V4_1)
3625static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3626{
3627 struct nfs4_delegreturndata *d_data;
3628
3629 d_data = (struct nfs4_delegreturndata *)data;
3630
3631 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3632 &d_data->args.seq_args,
3633 &d_data->res.seq_res, 1, task))
3634 return;
3635 rpc_call_start(task);
3636}
3637#endif /* CONFIG_NFS_V4_1 */
3638
c8d149f3 3639static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3640#if defined(CONFIG_NFS_V4_1)
3641 .rpc_call_prepare = nfs4_delegreturn_prepare,
3642#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3643 .rpc_call_done = nfs4_delegreturn_done,
3644 .rpc_release = nfs4_delegreturn_release,
3645};
3646
e6f81075 3647static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3648{
3649 struct nfs4_delegreturndata *data;
fa178f29 3650 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3651 struct rpc_task *task;
5138fde0
TM		 3652 struct rpc_message msg = {
3653 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3654 .rpc_cred = cred,
3655 };
c970aa85
TM		 3656 struct rpc_task_setup task_setup_data = {
3657 .rpc_client = server->client,
5138fde0 3658 .rpc_message = &msg,
c970aa85
TM		 3659 .callback_ops = &nfs4_delegreturn_ops,
3660 .flags = RPC_TASK_ASYNC,
3661 };
e6f81075 3662 int status = 0;
fe650407 3663
938e1010 3664 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3665 if (data == NULL)
3666 return -ENOMEM;
3667 data->args.fhandle = &data->fh;
3668 data->args.stateid = &data->stateid;
fa178f29 3669 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3670 nfs_copy_fh(&data->fh, NFS_FH(inode));
3671 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3672 data->res.fattr = &data->fattr;
3673 data->res.server = server;
5f7dbd5c 3674 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3675 nfs_fattr_init(data->res.fattr);
26e976a8 3676 data->timestamp = jiffies;
fe650407
TM		 3677 data->rpc_status = 0;
3678
c970aa85 3679 task_setup_data.callback_data = data;
5138fde0
TM		 3680 msg.rpc_argp = &data->args,
3681 msg.rpc_resp = &data->res,
c970aa85 3682 task = rpc_run_task(&task_setup_data);
7a1218a2 3683 if (IS_ERR(task))
fe650407 3684 return PTR_ERR(task);
e6f81075
TM		 3685 if (!issync)
3686 goto out;
fe650407 3687 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3688 if (status != 0)
3689 goto out;
3690 status = data->rpc_status;
3691 if (status != 0)
3692 goto out;
3693 nfs_refresh_inode(inode, &data->fattr);
3694out:
e6b3c4db 3695 rpc_put_task(task);
fe650407 3696 return status;
1da177e4
LT		 3697}
3698
e6f81075 3699int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3700{
3701 struct nfs_server *server = NFS_SERVER(inode);
3702 struct nfs4_exception exception = { };
3703 int err;
3704 do {
e6f81075 3705 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3706 switch (err) {
3707 case -NFS4ERR_STALE_STATEID:
3708 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3709 case 0:
3710 return 0;
3711 }
3712 err = nfs4_handle_exception(server, err, &exception);
3713 } while (exception.retry);
3714 return err;
3715}
3716
3717#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3718#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3719
3720/*
3721 * sleep, with exponential backoff, and retry the LOCK operation.
3722 */
3723static unsigned long
3724nfs4_set_lock_task_retry(unsigned long timeout)
3725{
150030b7 3726 schedule_timeout_killable(timeout);
1da177e4
LT		 3727 timeout <<= 1;
3728 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3729 return NFS4_LOCK_MAXTIMEOUT;
3730 return timeout;
3731}
3732
1da177e4
LT		 3733static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3734{
3735 struct inode *inode = state->inode;
3736 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3737 struct nfs_client *clp = server->nfs_client;
911d1aaf 3738 struct nfs_lockt_args arg = {
1da177e4 3739 .fh = NFS_FH(inode),
911d1aaf 3740 .fl = request,
1da177e4 3741 };
911d1aaf
TM		 3742 struct nfs_lockt_res res = {
3743 .denied = request,
1da177e4
LT		 3744 };
3745 struct rpc_message msg = {
3746 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3747 .rpc_argp = &arg,
3748 .rpc_resp = &res,
3749 .rpc_cred = state->owner->so_cred,
3750 };
1da177e4
LT		 3751 struct nfs4_lock_state *lsp;
3752 int status;
3753
911d1aaf 3754 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3755 status = nfs4_set_lock_state(state, request);
3756 if (status != 0)
3757 goto out;
3758 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3759 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3760 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3761 switch (status) {
3762 case 0:
3763 request->fl_type = F_UNLCK;
3764 break;
3765 case -NFS4ERR_DENIED:
3766 status = 0;
1da177e4 3767 }
70cc6487 3768 request->fl_ops->fl_release_private(request);
8d0a8a9d 3769out:
1da177e4
LT		 3770 return status;
3771}
3772
3773static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3774{
3775 struct nfs4_exception exception = { };
3776 int err;
3777
3778 do {
3779 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3780 _nfs4_proc_getlk(state, cmd, request),
3781 &exception);
3782 } while (exception.retry);
3783 return err;
3784}
3785
3786static int do_vfs_lock(struct file *file, struct file_lock *fl)
3787{
3788 int res = 0;
3789 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3790 case FL_POSIX:
3791 res = posix_lock_file_wait(file, fl);
3792 break;
3793 case FL_FLOCK:
3794 res = flock_lock_file_wait(file, fl);
3795 break;
3796 default:
3797 BUG();
3798 }
1da177e4
LT		 3799 return res;
3800}
3801
faf5f49c 3802struct nfs4_unlockdata {
911d1aaf
TM		 3803 struct nfs_locku_args arg;
3804 struct nfs_locku_res res;
faf5f49c
TM		 3805 struct nfs4_lock_state *lsp;
3806 struct nfs_open_context *ctx;
911d1aaf
TM		 3807 struct file_lock fl;
3808 const struct nfs_server *server;
26e976a8 3809 unsigned long timestamp;
faf5f49c
TM		 3810};
3811
911d1aaf
TM		 3812static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3813 struct nfs_open_context *ctx,
3814 struct nfs4_lock_state *lsp,
3815 struct nfs_seqid *seqid)
3816{
3817 struct nfs4_unlockdata *p;
3818 struct inode *inode = lsp->ls_state->inode;
3819
a893693c 3820 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3821 if (p == NULL)
3822 return NULL;
3823 p->arg.fh = NFS_FH(inode);
3824 p->arg.fl = &p->fl;
3825 p->arg.seqid = seqid;
c1d51931 3826 p->res.seqid = seqid;
5f7dbd5c 3827 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3828 p->arg.stateid = &lsp->ls_stateid;
3829 p->lsp = lsp;
3830 atomic_inc(&lsp->ls_count);
3831 /* Ensure we don't close file until we're done freeing locks! */
3832 p->ctx = get_nfs_open_context(ctx);
3833 memcpy(&p->fl, fl, sizeof(p->fl));
3834 p->server = NFS_SERVER(inode);
3835 return p;
3836}
3837
06f814a3 3838static void nfs4_locku_release_calldata(void *data)
faf5f49c 3839{
963d8fe5 3840 struct nfs4_unlockdata *calldata = data;
911d1aaf 3841 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3842 nfs4_put_lock_state(calldata->lsp);
3843 put_nfs_open_context(calldata->ctx);
3844 kfree(calldata);
faf5f49c
TM		 3845}
3846
963d8fe5 3847static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3848{
963d8fe5 3849 struct nfs4_unlockdata *calldata = data;
faf5f49c 3850
a893693c
AA		 3851 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3852 task->tk_status);
06f814a3
TM		 3853 if (RPC_ASSASSINATED(task))
3854 return;
faf5f49c
TM		 3855 switch (task->tk_status) {
3856 case 0:
3857 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3858 calldata->res.stateid.data,
faf5f49c 3859 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3860 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3861 break;
9e33bed5
TM		 3862 case -NFS4ERR_BAD_STATEID:
3863 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3864 case -NFS4ERR_STALE_STATEID:
3865 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3866 break;
3867 default:
9e33bed5 3868 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3869 nfs_restart_rpc(task,
d61e612a 3870 calldata->server->nfs_client);
faf5f49c 3871 }
faf5f49c
TM		 3872}
3873
4ce70ada 3874static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3875{
4ce70ada 3876 struct nfs4_unlockdata *calldata = data;
faf5f49c 3877
911d1aaf 3878 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3879 return;
3880 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3881 /* Note: exit _without_ running nfs4_locku_done */
3882 task->tk_action = NULL;
faf5f49c
TM		 3883 return;
3884 }
26e976a8 3885 calldata->timestamp = jiffies;
a893693c
AA		 3886 if (nfs4_setup_sequence(calldata->server->nfs_client,
3887 &calldata->arg.seq_args,
3888 &calldata->res.seq_res, 1, task))
3889 return;
5138fde0 3890 rpc_call_start(task);
faf5f49c
TM		 3891}
3892
963d8fe5 3893static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3894 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3895 .rpc_call_done = nfs4_locku_done,
06f814a3 3896 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3897};
3898
a5d16a4d
TM		 3899static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3900 struct nfs_open_context *ctx,
3901 struct nfs4_lock_state *lsp,
3902 struct nfs_seqid *seqid)
3903{
3904 struct nfs4_unlockdata *data;
5138fde0
TM		 3905 struct rpc_message msg = {
3906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3907 .rpc_cred = ctx->cred,
3908 };
c970aa85
TM		 3909 struct rpc_task_setup task_setup_data = {
3910 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3911 .rpc_message = &msg,
c970aa85 3912 .callback_ops = &nfs4_locku_ops,
101070ca 3913 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3914 .flags = RPC_TASK_ASYNC,
3915 };
a5d16a4d 3916
137d6aca
FF		 3917 /* Ensure this is an unlock - when canceling a lock, the
3918 * canceled lock is passed in, and it won't be an unlock.
3919 */
3920 fl->fl_type = F_UNLCK;
3921
a5d16a4d
TM		 3922 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3923 if (data == NULL) {
3924 nfs_free_seqid(seqid);
3925 return ERR_PTR(-ENOMEM);
3926 }
3927
5138fde0
TM		 3928 msg.rpc_argp = &data->arg,
3929 msg.rpc_resp = &data->res,
c970aa85
TM		 3930 task_setup_data.callback_data = data;
3931 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3932}
3933
faf5f49c
TM		 3934static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3935{
19e03c57 3936 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3937 struct nfs_seqid *seqid;
1da177e4 3938 struct nfs4_lock_state *lsp;
06f814a3
TM		 3939 struct rpc_task *task;
3940 int status = 0;
536ff0f8 3941 unsigned char fl_flags = request->fl_flags;
faf5f49c 3942
8d0a8a9d 3943 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3944 /* Unlock _before_ we do the RPC call */
3945 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3946 down_read(&nfsi->rwsem);
3947 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3948 up_read(&nfsi->rwsem);
9b073574 3949 goto out;
19e03c57
TM		 3950 }
3951 up_read(&nfsi->rwsem);
8d0a8a9d 3952 if (status != 0)
9b073574
TM		 3953 goto out;
3954 /* Is this a delegated lock? */
3955 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3956 goto out;
8d0a8a9d 3957 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3958 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3959 status = -ENOMEM;
911d1aaf 3960 if (seqid == NULL)
9b073574 3961 goto out;
cd3758e3 3962 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3963 status = PTR_ERR(task);
3964 if (IS_ERR(task))
9b073574 3965 goto out;
a5d16a4d 3966 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3967 rpc_put_task(task);
9b073574 3968out:
536ff0f8 3969 request->fl_flags = fl_flags;
1da177e4
LT		 3970 return status;
3971}
3972
a5d16a4d
TM		 3973struct nfs4_lockdata {
3974 struct nfs_lock_args arg;
3975 struct nfs_lock_res res;
3976 struct nfs4_lock_state *lsp;
3977 struct nfs_open_context *ctx;
3978 struct file_lock fl;
26e976a8 3979 unsigned long timestamp;
a5d16a4d
TM		 3980 int rpc_status;
3981 int cancelled;
66179efe 3982 struct nfs_server *server;
a5d16a4d
TM		 3983};
3984
3985static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3986 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3987{
a5d16a4d
TM		 3988 struct nfs4_lockdata *p;
3989 struct inode *inode = lsp->ls_state->inode;
1da177e4 3990 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3991
3992 p = kzalloc(sizeof(*p), GFP_KERNEL);
3993 if (p == NULL)
3994 return NULL;
3995
3996 p->arg.fh = NFS_FH(inode);
3997 p->arg.fl = &p->fl;
2f74c0a0
TM		 3998 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3999 if (p->arg.open_seqid == NULL)
4000 goto out_free;
a5d16a4d
TM		 4001 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
4002 if (p->arg.lock_seqid == NULL)
2f74c0a0 4003 goto out_free_seqid;
a5d16a4d 4004 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4005 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4006 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 4007 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 4008 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 4009 p->lsp = lsp;
66179efe 4010 p->server = server;
a5d16a4d
TM		 4011 atomic_inc(&lsp->ls_count);
4012 p->ctx = get_nfs_open_context(ctx);
4013 memcpy(&p->fl, fl, sizeof(p->fl));
4014 return p;
2f74c0a0
TM		 4015out_free_seqid:
4016 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4017out_free:
4018 kfree(p);
4019 return NULL;
4020}
4021
4022static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4023{
4024 struct nfs4_lockdata *data = calldata;
4025 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4026
3110ff80 4027 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4028 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4029 return;
a5d16a4d
TM		 4030 /* Do we need to do an open_to_lock_owner? */
4031 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4032 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4033 return;
a5d16a4d
TM		 4034 data->arg.open_stateid = &state->stateid;
4035 data->arg.new_lock_owner = 1;
c1d51931 4036 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4037 } else
4038 data->arg.new_lock_owner = 0;
26e976a8 4039 data->timestamp = jiffies;
66179efe
AA		 4040 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
4041 &data->res.seq_res, 1, task))
4042 return;
5138fde0 4043 rpc_call_start(task);
3110ff80 4044 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4045}
4046
b257957e
AB		 4047static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4048{
4049 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4050 nfs4_lock_prepare(task, calldata);
4051}
4052
a5d16a4d
TM		 4053static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4054{
4055 struct nfs4_lockdata *data = calldata;
4056
3110ff80 4057 dprintk("%s: begin!\n", __func__);
a5d16a4d 4058
d61e612a
TM		 4059 nfs4_sequence_done(data->server, &data->res.seq_res,
4060 task->tk_status);
66179efe 4061
a5d16a4d
TM		 4062 data->rpc_status = task->tk_status;
4063 if (RPC_ASSASSINATED(task))
4064 goto out;
4065 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4066 if (data->rpc_status == 0)
4067 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4068 else
4069 goto out;
4070 }
4071 if (data->rpc_status == 0) {
4072 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4073 sizeof(data->lsp->ls_stateid.data));
4074 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4075 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4076 }
a5d16a4d 4077out:
3110ff80 4078 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4079}
4080
4081static void nfs4_lock_release(void *calldata)
4082{
4083 struct nfs4_lockdata *data = calldata;
4084
3110ff80 4085 dprintk("%s: begin!\n", __func__);
2f74c0a0 4086 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4087 if (data->cancelled != 0) {
4088 struct rpc_task *task;
4089 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4090 data->arg.lock_seqid);
4091 if (!IS_ERR(task))
e6b3c4db 4092 rpc_put_task(task);
3110ff80 4093 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4094 } else
4095 nfs_free_seqid(data->arg.lock_seqid);
4096 nfs4_put_lock_state(data->lsp);
4097 put_nfs_open_context(data->ctx);
4098 kfree(data);
3110ff80 4099 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4100}
4101
4102static const struct rpc_call_ops nfs4_lock_ops = {
4103 .rpc_call_prepare = nfs4_lock_prepare,
4104 .rpc_call_done = nfs4_lock_done,
4105 .rpc_release = nfs4_lock_release,
4106};
4107
b257957e
AB		 4108static const struct rpc_call_ops nfs4_recover_lock_ops = {
4109 .rpc_call_prepare = nfs4_recover_lock_prepare,
4110 .rpc_call_done = nfs4_lock_done,
4111 .rpc_release = nfs4_lock_release,
4112};
4113
2bee72a6
TM		 4114static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4115{
4116 struct nfs_client *clp = server->nfs_client;
4117 struct nfs4_state *state = lsp->ls_state;
4118
4119 switch (error) {
4120 case -NFS4ERR_ADMIN_REVOKED:
4121 case -NFS4ERR_BAD_STATEID:
4122 case -NFS4ERR_EXPIRED:
4123 if (new_lock_owner != 0 ||
4124 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4125 nfs4_state_mark_reclaim_nograce(clp, state);
4126 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4127 break;
4128 case -NFS4ERR_STALE_STATEID:
4129 if (new_lock_owner != 0 ||
4130 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4131 nfs4_state_mark_reclaim_reboot(clp, state);
4132 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4133 };
4134}
4135
afe6c27c 4136static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4137{
4138 struct nfs4_lockdata *data;
4139 struct rpc_task *task;
5138fde0
TM		 4140 struct rpc_message msg = {
4141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4142 .rpc_cred = state->owner->so_cred,
4143 };
c970aa85
TM		 4144 struct rpc_task_setup task_setup_data = {
4145 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4146 .rpc_message = &msg,
c970aa85 4147 .callback_ops = &nfs4_lock_ops,
101070ca 4148 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4149 .flags = RPC_TASK_ASYNC,
4150 };
a5d16a4d
TM		 4151 int ret;
4152
3110ff80 4153 dprintk("%s: begin!\n", __func__);
cd3758e3 4154 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 4155 fl->fl_u.nfs4_fl.owner);
4156 if (data == NULL)
4157 return -ENOMEM;
4158 if (IS_SETLKW(cmd))
4159 data->arg.block = 1;
b257957e
AB		 4160 if (recovery_type > NFS_LOCK_NEW) {
4161 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4162 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4163 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4164 }
5138fde0
TM		 4165 msg.rpc_argp = &data->arg,
4166 msg.rpc_resp = &data->res,
c970aa85
TM		 4167 task_setup_data.callback_data = data;
4168 task = rpc_run_task(&task_setup_data);
7a1218a2 4169 if (IS_ERR(task))
a5d16a4d 4170 return PTR_ERR(task);
a5d16a4d
TM		 4171 ret = nfs4_wait_for_completion_rpc_task(task);
4172 if (ret == 0) {
4173 ret = data->rpc_status;
2bee72a6
TM		 4174 if (ret)
4175 nfs4_handle_setlk_error(data->server, data->lsp,
4176 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4177 } else
4178 data->cancelled = 1;
e6b3c4db 4179 rpc_put_task(task);
3110ff80 4180 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4181 return ret;
1da177e4
LT		 4182}
4183
4184static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4185{
202b50dc
TM		 4186 struct nfs_server *server = NFS_SERVER(state->inode);
4187 struct nfs4_exception exception = { };
4188 int err;
4189
4190 do {
42a2d13e
TM		 4191 /* Cache the lock if possible... */
4192 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4193 return 0;
afe6c27c 4194 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4195 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4196 break;
4197 nfs4_handle_exception(server, err, &exception);
4198 } while (exception.retry);
4199 return err;
1da177e4
LT		 4200}
4201
4202static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4203{
202b50dc
TM		 4204 struct nfs_server *server = NFS_SERVER(state->inode);
4205 struct nfs4_exception exception = { };
4206 int err;
4207
6bfc93ef
TM		 4208 err = nfs4_set_lock_state(state, request);
4209 if (err != 0)
4210 return err;
202b50dc 4211 do {
42a2d13e
TM		 4212 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4213 return 0;
afe6c27c 4214 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4215 switch (err) {
4216 default:
4217 goto out;
4218 case -NFS4ERR_GRACE:
4219 case -NFS4ERR_DELAY:
2c643488 4220 case -EKEYEXPIRED:
a9ed2e25
TM		 4221 nfs4_handle_exception(server, err, &exception);
4222 err = 0;
4223 }
202b50dc 4224 } while (exception.retry);
a9ed2e25 4225out:
202b50dc 4226 return err;
1da177e4
LT		 4227}
4228
4229static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4230{
19e03c57 4231 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4232 unsigned char fl_flags = request->fl_flags;
8e469ebd 4233 int status = -ENOLCK;
1da177e4 4234
8e469ebd
TM		 4235 if ((fl_flags & FL_POSIX) &&
4236 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4237 goto out;
6bfc93ef 4238 /* Is this a delegated open? */
6bfc93ef
TM		 4239 status = nfs4_set_lock_state(state, request);
4240 if (status != 0)
4241 goto out;
01c3b861
TM		 4242 request->fl_flags |= FL_ACCESS;
4243 status = do_vfs_lock(request->fl_file, request);
4244 if (status < 0)
4245 goto out;
19e03c57 4246 down_read(&nfsi->rwsem);
01c3b861 4247 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4248 /* Yes: cache locks! */
01c3b861 4249 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4250 request->fl_flags = fl_flags & ~FL_SLEEP;
4251 status = do_vfs_lock(request->fl_file, request);
4252 goto out_unlock;
01c3b861 4253 }
afe6c27c 4254 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4255 if (status != 0)
01c3b861 4256 goto out_unlock;
6bfc93ef 4257 /* Note: we always want to sleep here! */
01c3b861 4258 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4259 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4260 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4261out_unlock:
19e03c57 4262 up_read(&nfsi->rwsem);
01c3b861
TM		 4263out:
4264 request->fl_flags = fl_flags;
1da177e4
LT		 4265 return status;
4266}
4267
4268static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4269{
4270 struct nfs4_exception exception = { };
4271 int err;
4272
4273 do {
965b5d67
TM		 4274 err = _nfs4_proc_setlk(state, cmd, request);
4275 if (err == -NFS4ERR_DENIED)
4276 err = -EAGAIN;
1da177e4 4277 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4278 err, &exception);
1da177e4
LT		 4279 } while (exception.retry);
4280 return err;
4281}
4282
4283static int
4284nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4285{
4286 struct nfs_open_context *ctx;
4287 struct nfs4_state *state;
4288 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4289 int status;
4290
4291 /* verify open state */
cd3758e3 4292 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4293 state = ctx->state;
4294
4295 if (request->fl_start < 0 || request->fl_end < 0)
4296 return -EINVAL;
4297
d953126a
TM		 4298 if (IS_GETLK(cmd)) {
4299 if (state != NULL)
4300 return nfs4_proc_getlk(state, F_GETLK, request);
4301 return 0;
4302 }
1da177e4
LT		 4303
4304 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4305 return -EINVAL;
4306
d953126a
TM		 4307 if (request->fl_type == F_UNLCK) {
4308 if (state != NULL)
4309 return nfs4_proc_unlck(state, cmd, request);
4310 return 0;
4311 }
1da177e4 4312
d953126a
TM		 4313 if (state == NULL)
4314 return -ENOLCK;
1da177e4
LT		 4315 do {
4316 status = nfs4_proc_setlk(state, cmd, request);
4317 if ((status != -EAGAIN) || IS_SETLK(cmd))
4318 break;
4319 timeout = nfs4_set_lock_task_retry(timeout);
4320 status = -ERESTARTSYS;
4321 if (signalled())
4322 break;
4323 } while(status < 0);
1da177e4
LT		 4324 return status;
4325}
4326
888e694c
TM		 4327int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4328{
4329 struct nfs_server *server = NFS_SERVER(state->inode);
4330 struct nfs4_exception exception = { };
4331 int err;
4332
4333 err = nfs4_set_lock_state(state, fl);
4334 if (err != 0)
4335 goto out;
4336 do {
afe6c27c 4337 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4338 switch (err) {
4339 default:
4340 printk(KERN_ERR "%s: unhandled error %d.\n",
4341 __func__, err);
4342 case 0:
965b5d67 4343 case -ESTALE:
d5122201
TM		 4344 goto out;
4345 case -NFS4ERR_EXPIRED:
4346 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4347 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4348 case -NFS4ERR_BADSESSION:
4349 case -NFS4ERR_BADSLOT:
4350 case -NFS4ERR_BAD_HIGH_SLOT:
4351 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4352 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4353 nfs4_schedule_state_recovery(server->nfs_client);
4354 goto out;
965b5d67
TM		 4355 case -ERESTARTSYS:
4356 /*
4357 * The show must go on: exit, but mark the
4358 * stateid as needing recovery.
4359 */
4360 case -NFS4ERR_ADMIN_REVOKED:
4361 case -NFS4ERR_BAD_STATEID:
4362 case -NFS4ERR_OPENMODE:
4363 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4364 err = 0;
4365 goto out;
4366 case -ENOMEM:
4367 case -NFS4ERR_DENIED:
4368 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4369 err = 0;
4370 goto out;
d5122201 4371 case -NFS4ERR_DELAY:
2c643488 4372 case -EKEYEXPIRED:
d5122201
TM		 4373 break;
4374 }
888e694c
TM		 4375 err = nfs4_handle_exception(server, err, &exception);
4376 } while (exception.retry);
4377out:
4378 return err;
4379}
6b3b5496 4380
aa1870af
BF		 4381#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4382
6b3b5496
BF		 4383int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4384 size_t buflen, int flags)
4385{
4b580ee3
BF		 4386 struct inode *inode = dentry->d_inode;
4387
4388 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4389 return -EOPNOTSUPP;
4390
4b580ee3 4391 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4392}
4393
4394/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4395 * and that's what we'll do for e.g. user attributes that haven't been set.
4396 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4397 * attributes in kernel-managed attribute namespaces. */
4398ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4399 size_t buflen)
4400{
aa1870af
BF		 4401 struct inode *inode = dentry->d_inode;
4402
4403 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4404 return -EOPNOTSUPP;
4405
4406 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4407}
4408
4409ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4410{
aa1870af 4411 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4412
096455a2
BF		 4413 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4414 return 0;
6b3b5496
BF		 4415 if (buf && buflen < len)
4416 return -ERANGE;
4417 if (buf)
aa1870af
BF		 4418 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4419 return len;
6b3b5496
BF		 4420}
4421
69aaaae1
TM		 4422static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4423{
4424 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4425 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4426 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4427 return;
4428
4429 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4430 NFS_ATTR_FATTR_NLINK;
4431 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4432 fattr->nlink = 2;
4433}
4434
56659e99 4435int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4436 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4437{
4438 struct nfs_server *server = NFS_SERVER(dir);
4439 u32 bitmask[2] = {
361e624f
MN		 4440 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4441 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4442 };
4443 struct nfs4_fs_locations_arg args = {
4444 .dir_fh = NFS_FH(dir),
c228fd3a 4445 .name = name,
683b57b4
TM		 4446 .page = page,
4447 .bitmask = bitmask,
4448 };
22958463
BH		 4449 struct nfs4_fs_locations_res res = {
4450 .fs_locations = fs_locations,
4451 };
683b57b4
TM		 4452 struct rpc_message msg = {
4453 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4454 .rpc_argp = &args,
22958463 4455 .rpc_resp = &res,
683b57b4
TM		 4456 };
4457 int status;
4458
3110ff80 4459 dprintk("%s: start\n", __func__);
c228fd3a 4460 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4461 fs_locations->server = server;
830b8e33 4462 fs_locations->nlocations = 0;
cccef3b9 4463 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4464 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4465 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4466 return status;
4467}
4468
557134a3 4469#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4470/*
4471 * nfs4_proc_exchange_id()
4472 *
4473 * Since the clientid has expired, all compounds using sessions
4474 * associated with the stale clientid will be returning
4475 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4476 * be in some phase of session reset.
4477 */
4d643d1d 4478int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4479{
4480 nfs4_verifier verifier;
4481 struct nfs41_exchange_id_args args = {
4482 .client = clp,
4483 .flags = clp->cl_exchange_flags,
4484 };
4485 struct nfs41_exchange_id_res res = {
4486 .client = clp,
4487 };
4488 int status;
4489 struct rpc_message msg = {
4490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4491 .rpc_argp = &args,
4492 .rpc_resp = &res,
4493 .rpc_cred = cred,
4494 };
4495 __be32 *p;
4496
4497 dprintk("--> %s\n", __func__);
4498 BUG_ON(clp == NULL);
a7b72103 4499
7b183d0d
AB		 4500 /* Remove server-only flags */
4501 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4502
99fe60d0
BH		 4503 p = (u32 *)verifier.data;
4504 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4505 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4506 args.verifier = &verifier;
4507
4508 while (1) {
4509 args.id_len = scnprintf(args.id, sizeof(args.id),
4510 "%s/%s %u",
4511 clp->cl_ipaddr,
4512 rpc_peeraddr2str(clp->cl_rpcclient,
4513 RPC_DISPLAY_ADDR),
4514 clp->cl_id_uniquifier);
4515
4516 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4517
4518 if (status != NFS4ERR_CLID_INUSE)
4519 break;
4520
4521 if (signalled())
4522 break;
4523
4524 if (++clp->cl_id_uniquifier == 0)
4525 break;
4526 }
4527
4528 dprintk("<-- %s status= %d\n", __func__, status);
4529 return status;
4530}
4531
2050f0cc
AA		 4532struct nfs4_get_lease_time_data {
4533 struct nfs4_get_lease_time_args *args;
4534 struct nfs4_get_lease_time_res *res;
4535 struct nfs_client *clp;
4536};
4537
4538static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4539 void *calldata)
4540{
4541 int ret;
4542 struct nfs4_get_lease_time_data *data =
4543 (struct nfs4_get_lease_time_data *)calldata;
4544
4545 dprintk("--> %s\n", __func__);
689cf5c1 4546 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4547 /* just setup sequence, do not trigger session recovery
4548 since we're invoked within one */
4549 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4550 &data->args->la_seq_args,
4551 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4552
4553 BUG_ON(ret == -EAGAIN);
4554 rpc_call_start(task);
4555 dprintk("<-- %s\n", __func__);
4556}
4557
4558/*
4559 * Called from nfs4_state_manager thread for session setup, so don't recover
4560 * from sequence operation or clientid errors.
4561 */
4562static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4563{
4564 struct nfs4_get_lease_time_data *data =
4565 (struct nfs4_get_lease_time_data *)calldata;
4566
4567 dprintk("--> %s\n", __func__);
4568 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4569 switch (task->tk_status) {
4570 case -NFS4ERR_DELAY:
4571 case -NFS4ERR_GRACE:
2c643488 4572 case -EKEYEXPIRED:
2050f0cc
AA		 4573 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4574 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4575 task->tk_status = 0;
0110ee15 4576 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4577 return;
4578 }
2050f0cc
AA		 4579 dprintk("<-- %s\n", __func__);
4580}
4581
4582struct rpc_call_ops nfs4_get_lease_time_ops = {
4583 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4584 .rpc_call_done = nfs4_get_lease_time_done,
4585};
4586
4587int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4588{
4589 struct rpc_task *task;
4590 struct nfs4_get_lease_time_args args;
4591 struct nfs4_get_lease_time_res res = {
4592 .lr_fsinfo = fsinfo,
4593 };
4594 struct nfs4_get_lease_time_data data = {
4595 .args = &args,
4596 .res = &res,
4597 .clp = clp,
4598 };
4599 struct rpc_message msg = {
4600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4601 .rpc_argp = &args,
4602 .rpc_resp = &res,
4603 };
4604 struct rpc_task_setup task_setup = {
4605 .rpc_client = clp->cl_rpcclient,
4606 .rpc_message = &msg,
4607 .callback_ops = &nfs4_get_lease_time_ops,
4608 .callback_data = &data
4609 };
4610 int status;
4611
4612 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4613 dprintk("--> %s\n", __func__);
4614 task = rpc_run_task(&task_setup);
4615
4616 if (IS_ERR(task))
4617 status = PTR_ERR(task);
4618 else {
4619 status = task->tk_status;
4620 rpc_put_task(task);
4621 }
4622 dprintk("<-- %s return %d\n", __func__, status);
4623
4624 return status;
4625}
4626
b73dafa7
RL		 4627/*
4628 * Reset a slot table
4629 */
104aeba4
AA		 4630static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4631 int ivalue)
ac72b7b3 4632{
104aeba4 4633 struct nfs4_slot *new = NULL;
b73dafa7 4634 int i;
ac72b7b3
AA		 4635 int ret = 0;
4636
104aeba4
AA		 4637 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4638 max_reqs, tbl->max_slots);
ac72b7b3 4639
104aeba4
AA		 4640 /* Does the newly negotiated max_reqs match the existing slot table? */
4641 if (max_reqs != tbl->max_slots) {
4642 ret = -ENOMEM;
4643 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4644 GFP_KERNEL);
4645 if (!new)
4646 goto out;
4647 ret = 0;
4648 kfree(tbl->slots);
ac72b7b3
AA		 4649 }
4650 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4651 if (new) {
4652 tbl->slots = new;
4653 tbl->max_slots = max_reqs;
4654 }
4655 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4656 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4657 spin_unlock(&tbl->slot_tbl_lock);
4658 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4659 tbl, tbl->slots, tbl->max_slots);
4660out:
4661 dprintk("<-- %s: return %d\n", __func__, ret);
4662 return ret;
4663}
4664
b73dafa7
RL		 4665/*
4666 * Reset the forechannel and backchannel slot tables
4667 */
4668static int nfs4_reset_slot_tables(struct nfs4_session *session)
4669{
4670 int status;
4671
4672 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4673 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4674 if (status)
4675 return status;
4676
4677 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4678 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4679 return status;
4680}
4681
f8625a6a
RL		 4682/* Destroy the slot table */
4683static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4684{
4685 if (session->fc_slot_table.slots != NULL) {
4686 kfree(session->fc_slot_table.slots);
4687 session->fc_slot_table.slots = NULL;
4688 }
4689 if (session->bc_slot_table.slots != NULL) {
4690 kfree(session->bc_slot_table.slots);
4691 session->bc_slot_table.slots = NULL;
4692 }
4693 return;
4694}
4695
fc931582
AA		 4696/*
4697 * Initialize slot table
4698 */
050047ce
RL		 4699static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4700 int max_slots, int ivalue)
fc931582 4701{
fc931582
AA		 4702 struct nfs4_slot *slot;
4703 int ret = -ENOMEM;
4704
4705 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4706
050047ce 4707 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4708
4709 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4710 if (!slot)
4711 goto out;
fc931582
AA		 4712 ret = 0;
4713
4714 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4715 tbl->max_slots = max_slots;
4716 tbl->slots = slot;
4717 tbl->highest_used_slotid = -1; /* no slot is currently used */
4718 spin_unlock(&tbl->slot_tbl_lock);
4719 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4720 tbl, tbl->slots, tbl->max_slots);
4721out:
4722 dprintk("<-- %s: return %d\n", __func__, ret);
4723 return ret;
fc931582
AA		 4724}
4725
050047ce
RL		 4726/*
4727 * Initialize the forechannel and backchannel tables
4728 */
4729static int nfs4_init_slot_tables(struct nfs4_session *session)
4730{
f26468fb
TM		 4731 struct nfs4_slot_table *tbl;
4732 int status = 0;
050047ce 4733
f26468fb
TM		 4734 tbl = &session->fc_slot_table;
4735 if (tbl->slots == NULL) {
4736 status = nfs4_init_slot_table(tbl,
4737 session->fc_attrs.max_reqs, 1);
4738 if (status)
4739 return status;
4740 }
050047ce 4741
f26468fb
TM		 4742 tbl = &session->bc_slot_table;
4743 if (tbl->slots == NULL) {
4744 status = nfs4_init_slot_table(tbl,
4745 session->bc_attrs.max_reqs, 0);
4746 if (status)
4747 nfs4_destroy_slot_tables(session);
4748 }
f8625a6a
RL		 4749
4750 return status;
557134a3
AA		 4751}
4752
4753struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4754{
4755 struct nfs4_session *session;
4756 struct nfs4_slot_table *tbl;
4757
4758 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4759 if (!session)
4760 return NULL;
76db6d95 4761
76db6d95
AA		 4762 /*
4763 * The create session reply races with the server back
4764 * channel probe. Mark the client NFS_CS_SESSION_INITING
4765 * so that the client back channel can find the
4766 * nfs_client struct
4767 */
4768 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4769 init_completion(&session->complete);
76db6d95 4770
557134a3 4771 tbl = &session->fc_slot_table;
9dfdf404 4772 tbl->highest_used_slotid = -1;
557134a3 4773 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4774 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4775
4776 tbl = &session->bc_slot_table;
9dfdf404 4777 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4778 spin_lock_init(&tbl->slot_tbl_lock);
4779 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4780
557134a3
AA		 4781 session->clp = clp;
4782 return session;
4783}
4784
4785void nfs4_destroy_session(struct nfs4_session *session)
4786{
5a0ffe54
AA		 4787 nfs4_proc_destroy_session(session);
4788 dprintk("%s Destroy backchannel for xprt %p\n",
4789 __func__, session->clp->cl_rpcclient->cl_xprt);
4790 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4791 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4792 nfs4_destroy_slot_tables(session);
557134a3
AA		 4793 kfree(session);
4794}
4795
fc931582
AA		 4796/*
4797 * Initialize the values to be used by the client in CREATE_SESSION
4798 * If nfs4_init_session set the fore channel request and response sizes,
4799 * use them.
4800 *
4801 * Set the back channel max_resp_sz_cached to zero to force the client to
4802 * always set csa_cachethis to FALSE because the current implementation
4803 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4804 */
4805static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4806{
4807 struct nfs4_session *session = args->client->cl_session;
4808 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4809 mxresp_sz = session->fc_attrs.max_resp_sz;
4810
4811 if (mxrqst_sz == 0)
4812 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4813 if (mxresp_sz == 0)
4814 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4815 /* Fore channel attributes */
4816 args->fc_attrs.headerpadsz = 0;
4817 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4818 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4819 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4820 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4821
4822 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4823 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4824 __func__,
4825 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4826 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4827
4828 /* Back channel attributes */
4829 args->bc_attrs.headerpadsz = 0;
4830 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4831 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4832 args->bc_attrs.max_resp_sz_cached = 0;
4833 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4834 args->bc_attrs.max_reqs = 1;
4835
4836 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4837 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4838 __func__,
4839 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4840 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4841 args->bc_attrs.max_reqs);
4842}
4843
8d35301d
AA		 4844static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4845{
4846 if (rcvd <= sent)
4847 return 0;
4848 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4849 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4850 return -EINVAL;
4851}
4852
4853#define _verify_fore_channel_attr(_name_) \
4854 _verify_channel_attr("fore", #_name_, \
4855 args->fc_attrs._name_, \
4856 session->fc_attrs._name_)
4857
4858#define _verify_back_channel_attr(_name_) \
4859 _verify_channel_attr("back", #_name_, \
4860 args->bc_attrs._name_, \
4861 session->bc_attrs._name_)
4862
4863/*
4864 * The server is not allowed to increase the fore channel header pad size,
4865 * maximum response size, or maximum number of operations.
4866 *
4867 * The back channel attributes are only negotiatied down: We send what the
4868 * (back channel) server insists upon.
4869 */
4870static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4871 struct nfs4_session *session)
4872{
4873 int ret = 0;
4874
4875 ret |= _verify_fore_channel_attr(headerpadsz);
4876 ret |= _verify_fore_channel_attr(max_resp_sz);
4877 ret |= _verify_fore_channel_attr(max_ops);
4878
4879 ret |= _verify_back_channel_attr(headerpadsz);
4880 ret |= _verify_back_channel_attr(max_rqst_sz);
4881 ret |= _verify_back_channel_attr(max_resp_sz);
4882 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4883 ret |= _verify_back_channel_attr(max_ops);
4884 ret |= _verify_back_channel_attr(max_reqs);
4885
4886 return ret;
4887}
4888
fc931582
AA		 4889static int _nfs4_proc_create_session(struct nfs_client *clp)
4890{
4891 struct nfs4_session *session = clp->cl_session;
4892 struct nfs41_create_session_args args = {
4893 .client = clp,
4894 .cb_program = NFS4_CALLBACK,
4895 };
4896 struct nfs41_create_session_res res = {
4897 .client = clp,
4898 };
4899 struct rpc_message msg = {
4900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4901 .rpc_argp = &args,
4902 .rpc_resp = &res,
4903 };
4904 int status;
4905
4906 nfs4_init_channel_attrs(&args);
0f91421e 4907 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4908
4909 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4910
8d35301d
AA		 4911 if (!status)
4912 /* Verify the session's negotiated channel_attrs values */
4913 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4914 if (!status) {
4915 /* Increment the clientid slot sequence id */
4916 clp->cl_seqid++;
4917 }
4918
4919 return status;
4920}
4921
4922/*
4923 * Issues a CREATE_SESSION operation to the server.
4924 * It is the responsibility of the caller to verify the session is
4925 * expired before calling this routine.
4926 */
f26468fb 4927int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4928{
4929 int status;
4930 unsigned *ptr;
fc931582
AA		 4931 struct nfs4_session *session = clp->cl_session;
4932
4933 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4934
4935 status = _nfs4_proc_create_session(clp);
4936 if (status)
4937 goto out;
4938
f26468fb
TM		 4939 /* Init and reset the fore channel */
4940 status = nfs4_init_slot_tables(session);
4941 dprintk("slot table initialization returned %d\n", status);
4942 if (status)
4943 goto out;
4944 status = nfs4_reset_slot_tables(session);
4945 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4946 if (status)
4947 goto out;
4948
4949 ptr = (unsigned *)&session->sess_id.data[0];
4950 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4951 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4952out:
4953 dprintk("<-- %s\n", __func__);
4954 return status;
4955}
4956
0f3e66c6
AA		 4957/*
4958 * Issue the over-the-wire RPC DESTROY_SESSION.
4959 * The caller must serialize access to this routine.
4960 */
4961int nfs4_proc_destroy_session(struct nfs4_session *session)
4962{
4963 int status = 0;
4964 struct rpc_message msg;
4965
4966 dprintk("--> nfs4_proc_destroy_session\n");
4967
4968 /* session is still being setup */
4969 if (session->clp->cl_cons_state != NFS_CS_READY)
4970 return status;
4971
4972 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4973 msg.rpc_argp = session;
4974 msg.rpc_resp = NULL;
4975 msg.rpc_cred = NULL;
4976 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4977
4978 if (status)
4979 printk(KERN_WARNING
4980 "Got error %d from the server on DESTROY_SESSION. "
4981 "Session has been destroyed regardless...\n", status);
4982
4983 dprintk("<-- nfs4_proc_destroy_session\n");
4984 return status;
4985}
4986
fccba804
TM		 4987int nfs4_init_session(struct nfs_server *server)
4988{
4989 struct nfs_client *clp = server->nfs_client;
2449ea2e 4990 struct nfs4_session *session;
68bf05ef 4991 unsigned int rsize, wsize;
fccba804
TM		 4992 int ret;
4993
4994 if (!nfs4_has_session(clp))
4995 return 0;
4996
68bf05ef
AA		 4997 rsize = server->rsize;
4998 if (rsize == 0)
4999 rsize = NFS_MAX_FILE_IO_SIZE;
5000 wsize = server->wsize;
5001 if (wsize == 0)
5002 wsize = NFS_MAX_FILE_IO_SIZE;
5003
2449ea2e 5004 session = clp->cl_session;
68bf05ef
AA		 5005 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5006 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5007
fccba804
TM		 5008 ret = nfs4_recover_expired_lease(server);
5009 if (!ret)
5010 ret = nfs4_check_client_ready(clp);
5011 return ret;
5012}
5013
fc01cea9
AA		 5014/*
5015 * Renew the cl_session lease.
5016 */
5017static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5018{
5019 struct nfs4_sequence_args args;
5020 struct nfs4_sequence_res res;
5021
5022 struct rpc_message msg = {
5023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5024 .rpc_argp = &args,
5025 .rpc_resp = &res,
5026 .rpc_cred = cred,
5027 };
5028
5029 args.sa_cache_this = 0;
5030
5031 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
b257957e 5032 &res, args.sa_cache_this, 1);
fc01cea9
AA		 5033}
5034
dc96aef9
AB		 5035static void nfs41_sequence_release(void *data)
5036{
5037 struct nfs_client *clp = (struct nfs_client *)data;
5038
7135840f
AB		 5039 if (atomic_read(&clp->cl_count) > 1)
5040 nfs4_schedule_state_renewal(clp);
5041 nfs_put_client(clp);
dc96aef9
AB		 5042}
5043
5044static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9
AA		 5045{
5046 struct nfs_client *clp = (struct nfs_client *)data;
5047
5048 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
5049
5050 if (task->tk_status < 0) {
5051 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5052 if (atomic_read(&clp->cl_count) == 1)
5053 goto out;
fc01cea9
AA		 5054
5055 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
5056 == -EAGAIN) {
0110ee15 5057 nfs_restart_rpc(task, clp);
fc01cea9
AA		 5058 return;
5059 }
5060 }
fc01cea9 5061 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5062out:
fc01cea9
AA		 5063 kfree(task->tk_msg.rpc_argp);
5064 kfree(task->tk_msg.rpc_resp);
5065
5066 dprintk("<-- %s\n", __func__);
5067}
5068
5069static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5070{
5071 struct nfs_client *clp;
5072 struct nfs4_sequence_args *args;
5073 struct nfs4_sequence_res *res;
5074
5075 clp = (struct nfs_client *)data;
5076 args = task->tk_msg.rpc_argp;
5077 res = task->tk_msg.rpc_resp;
5078
5079 if (nfs4_setup_sequence(clp, args, res, 0, task))
5080 return;
5081 rpc_call_start(task);
5082}
5083
5084static const struct rpc_call_ops nfs41_sequence_ops = {
5085 .rpc_call_done = nfs41_sequence_call_done,
5086 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5087 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5088};
5089
5090static int nfs41_proc_async_sequence(struct nfs_client *clp,
5091 struct rpc_cred *cred)
5092{
5093 struct nfs4_sequence_args *args;
5094 struct nfs4_sequence_res *res;
5095 struct rpc_message msg = {
5096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5097 .rpc_cred = cred,
5098 };
5099
7135840f
AB		 5100 if (!atomic_inc_not_zero(&clp->cl_count))
5101 return -EIO;
fc01cea9 5102 args = kzalloc(sizeof(*args), GFP_KERNEL);
fc01cea9 5103 res = kzalloc(sizeof(*res), GFP_KERNEL);
7135840f 5104 if (!args || !res) {
fc01cea9 5105 kfree(args);
7135840f 5106 nfs_put_client(clp);
fc01cea9
AA		 5107 return -ENOMEM;
5108 }
5109 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
5110 msg.rpc_argp = args;
5111 msg.rpc_resp = res;
5112
5113 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
5114 &nfs41_sequence_ops, (void *)clp);
5115}
5116
fce5c838
RL		 5117struct nfs4_reclaim_complete_data {
5118 struct nfs_client *clp;
5119 struct nfs41_reclaim_complete_args arg;
5120 struct nfs41_reclaim_complete_res res;
5121};
5122
5123static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5124{
5125 struct nfs4_reclaim_complete_data *calldata = data;
5126
b257957e 5127 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
fce5c838
RL		 5128 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
5129 &calldata->res.seq_res, 0, task))
5130 return;
5131
5132 rpc_call_start(task);
5133}
5134
5135static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5136{
5137 struct nfs4_reclaim_complete_data *calldata = data;
5138 struct nfs_client *clp = calldata->clp;
5139 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5140
5141 dprintk("--> %s\n", __func__);
5142 nfs41_sequence_done(clp, res, task->tk_status);
5143 switch (task->tk_status) {
5144 case 0:
5145 case -NFS4ERR_COMPLETE_ALREADY:
5146 break;
5147 case -NFS4ERR_BADSESSION:
5148 case -NFS4ERR_DEADSESSION:
5149 /*
5150 * Handle the session error, but do not retry the operation, as
5151 * we have no way of telling whether the clientid had to be
5152 * reset before we got our reply. If reset, a new wave of
5153 * reclaim operations will follow, containing their own reclaim
5154 * complete. We don't want our retry to get on the way of
5155 * recovery by incorrectly indicating to the server that we're
5156 * done reclaiming state since the process had to be restarted.
5157 */
5158 _nfs4_async_handle_error(task, NULL, clp, NULL);
5159 break;
5160 default:
5161 if (_nfs4_async_handle_error(
5162 task, NULL, clp, NULL) == -EAGAIN) {
5163 rpc_restart_call_prepare(task);
5164 return;
5165 }
5166 }
fce5c838
RL		 5167
5168 dprintk("<-- %s\n", __func__);
5169}
5170
5171static void nfs4_free_reclaim_complete_data(void *data)
5172{
5173 struct nfs4_reclaim_complete_data *calldata = data;
5174
5175 kfree(calldata);
5176}
5177
5178static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5179 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5180 .rpc_call_done = nfs4_reclaim_complete_done,
5181 .rpc_release = nfs4_free_reclaim_complete_data,
5182};
5183
5184/*
5185 * Issue a global reclaim complete.
5186 */
5187static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5188{
5189 struct nfs4_reclaim_complete_data *calldata;
5190 struct rpc_task *task;
5191 struct rpc_message msg = {
5192 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5193 };
5194 struct rpc_task_setup task_setup_data = {
5195 .rpc_client = clp->cl_rpcclient,
5196 .rpc_message = &msg,
5197 .callback_ops = &nfs4_reclaim_complete_call_ops,
5198 .flags = RPC_TASK_ASYNC,
5199 };
5200 int status = -ENOMEM;
5201
5202 dprintk("--> %s\n", __func__);
5203 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5204 if (calldata == NULL)
5205 goto out;
5206 calldata->clp = clp;
5207 calldata->arg.one_fs = 0;
5208 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5209
5210 msg.rpc_argp = &calldata->arg;
5211 msg.rpc_resp = &calldata->res;
5212 task_setup_data.callback_data = calldata;
5213 task = rpc_run_task(&task_setup_data);
5214 if (IS_ERR(task))
5215 status = PTR_ERR(task);
5216 rpc_put_task(task);
5217out:
5218 dprintk("<-- %s status=%d\n", __func__, status);
5219 return status;
5220}
557134a3
AA		 5221#endif /* CONFIG_NFS_V4_1 */
5222
591d71cb 5223struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5224 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5225 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5226 .recover_open = nfs4_open_reclaim,
5227 .recover_lock = nfs4_lock_reclaim,
591d71cb 5228 .establish_clid = nfs4_init_clientid,
90a16617 5229 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5230};
5231
591d71cb
AA		 5232#if defined(CONFIG_NFS_V4_1)
5233struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5234 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5235 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5236 .recover_open = nfs4_open_reclaim,
5237 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5238 .establish_clid = nfs41_init_clientid,
b4b82607 5239 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5240 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5241};
5242#endif /* CONFIG_NFS_V4_1 */
5243
5244struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5245 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5246 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5247 .recover_open = nfs4_open_expired,
5248 .recover_lock = nfs4_lock_expired,
5249 .establish_clid = nfs4_init_clientid,
90a16617 5250 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5251};
5252
5253#if defined(CONFIG_NFS_V4_1)
5254struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5255 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5256 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5257 .recover_open = nfs4_open_expired,
5258 .recover_lock = nfs4_lock_expired,
4d643d1d 5259 .establish_clid = nfs41_init_clientid,
b4b82607 5260 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5261};
591d71cb 5262#endif /* CONFIG_NFS_V4_1 */
1da177e4 5263
29fba38b
BH		 5264struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5265 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5266 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5267 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5268};
5269
5270#if defined(CONFIG_NFS_V4_1)
5271struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5272 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5273 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5274 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5275};
5276#endif
5277
5278/*
5279 * Per minor version reboot and network partition recovery ops
5280 */
5281
591d71cb
AA		 5282struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5283 &nfs40_reboot_recovery_ops,
5284#if defined(CONFIG_NFS_V4_1)
5285 &nfs41_reboot_recovery_ops,
5286#endif
5287};
5288
5289struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5290 &nfs40_nograce_recovery_ops,
5291#if defined(CONFIG_NFS_V4_1)
5292 &nfs41_nograce_recovery_ops,
5293#endif
5294};
5295
29fba38b
BH		 5296struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5297 &nfs40_state_renewal_ops,
5298#if defined(CONFIG_NFS_V4_1)
5299 &nfs41_state_renewal_ops,
5300#endif
5301};
5302
92e1d5be 5303static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5304 .permission = nfs_permission,
5305 .getattr = nfs_getattr,
5306 .setattr = nfs_setattr,
5307 .getxattr = nfs4_getxattr,
5308 .setxattr = nfs4_setxattr,
5309 .listxattr = nfs4_listxattr,
5310};
5311
509de811 5312const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5313 .version = 4, /* protocol version */
5314 .dentry_ops = &nfs4_dentry_operations,
5315 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5316 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5317 .getroot = nfs4_proc_get_root,
5318 .getattr = nfs4_proc_getattr,
5319 .setattr = nfs4_proc_setattr,
2b3de441 5320 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5321 .lookup = nfs4_proc_lookup,
5322 .access = nfs4_proc_access,
5323 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5324 .create = nfs4_proc_create,
5325 .remove = nfs4_proc_remove,
5326 .unlink_setup = nfs4_proc_unlink_setup,
5327 .unlink_done = nfs4_proc_unlink_done,
5328 .rename = nfs4_proc_rename,
5329 .link = nfs4_proc_link,
5330 .symlink = nfs4_proc_symlink,
5331 .mkdir = nfs4_proc_mkdir,
5332 .rmdir = nfs4_proc_remove,
5333 .readdir = nfs4_proc_readdir,
5334 .mknod = nfs4_proc_mknod,
5335 .statfs = nfs4_proc_statfs,
5336 .fsinfo = nfs4_proc_fsinfo,
5337 .pathconf = nfs4_proc_pathconf,
e9326dca 5338 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5339 .decode_dirent = nfs4_decode_dirent,
5340 .read_setup = nfs4_proc_read_setup,
ec06c096 5341 .read_done = nfs4_read_done,
1da177e4 5342 .write_setup = nfs4_proc_write_setup,
788e7a89 5343 .write_done = nfs4_write_done,
1da177e4 5344 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5345 .commit_done = nfs4_commit_done,
1da177e4 5346 .lock = nfs4_proc_lock,
e50a1c2e 5347 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5348 .close_context = nfs4_close_context,
1da177e4
LT		 5349};
5350
5351/*
5352 * Local variables:
5353 * c-basic-offset: 8
5354 * End:
5355 */
Linux 6.x block layer and io_uring tree(s)