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nfs: show "local_lock" mount option in /proc/mounts
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
5a0e3ad6 42#include <linux/slab.h>
1da177e4
LT		 43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
1da177e4 48#include <linux/namei.h>
02a913a7 49#include <linux/mount.h>
99fe60d0 50#include <linux/module.h>
5a0ffe54 51#include <linux/sunrpc/bc_xprt.h>
1da177e4 52
4ce79717 53#include "nfs4_fs.h"
1da177e4 54#include "delegation.h"
101070ca 55#include "internal.h"
006ea73e 56#include "iostat.h"
fc931582 57#include "callback.h"
1da177e4
LT		 58
59#define NFSDBG_FACILITY NFSDBG_PROC
60
2066fe89 61#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 62#define NFS4_POLL_RETRY_MAX (15*HZ)
63
a78cb57a
TM		 64#define NFS4_MAX_LOOP_ON_RECOVER (10)
65
cdd4e68b 66struct nfs4_opendata;
864472e9 67static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 68static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 69static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 70static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 71static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
72static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 73static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
74 struct nfs_fattr *fattr, struct iattr *sattr,
75 struct nfs4_state *state);
1da177e4 76
1da177e4 77/* Prevent leaks of NFSv4 errors into userland */
46f72f57 78static int nfs4_map_errors(int err)
1da177e4 79{
52567b03
TM		 80 if (err >= -1000)
81 return err;
82 switch (err) {
83 case -NFS4ERR_RESOURCE:
84 return -EREMOTEIO;
85 default:
1da177e4 86 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 87 __func__, -err);
52567b03 88 break;
1da177e4 89 }
52567b03 90 return -EIO;
1da177e4
LT		 91}
92
93/*
94 * This is our standard bitmap for GETATTR requests.
95 */
96const u32 nfs4_fattr_bitmap[2] = {
97 FATTR4_WORD0_TYPE
98 | FATTR4_WORD0_CHANGE
99 | FATTR4_WORD0_SIZE
100 | FATTR4_WORD0_FSID
101 | FATTR4_WORD0_FILEID,
102 FATTR4_WORD1_MODE
103 | FATTR4_WORD1_NUMLINKS
104 | FATTR4_WORD1_OWNER
105 | FATTR4_WORD1_OWNER_GROUP
106 | FATTR4_WORD1_RAWDEV
107 | FATTR4_WORD1_SPACE_USED
108 | FATTR4_WORD1_TIME_ACCESS
109 | FATTR4_WORD1_TIME_METADATA
110 | FATTR4_WORD1_TIME_MODIFY
111};
112
113const u32 nfs4_statfs_bitmap[2] = {
114 FATTR4_WORD0_FILES_AVAIL
115 | FATTR4_WORD0_FILES_FREE
116 | FATTR4_WORD0_FILES_TOTAL,
117 FATTR4_WORD1_SPACE_AVAIL
118 | FATTR4_WORD1_SPACE_FREE
119 | FATTR4_WORD1_SPACE_TOTAL
120};
121
4ce79717 122const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 123 FATTR4_WORD0_MAXLINK
124 | FATTR4_WORD0_MAXNAME,
125 0
126};
127
128const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
129 | FATTR4_WORD0_MAXREAD
130 | FATTR4_WORD0_MAXWRITE
131 | FATTR4_WORD0_LEASE_TIME,
132 0
133};
134
830b8e33
MN		 135const u32 nfs4_fs_locations_bitmap[2] = {
136 FATTR4_WORD0_TYPE
137 | FATTR4_WORD0_CHANGE
138 | FATTR4_WORD0_SIZE
139 | FATTR4_WORD0_FSID
140 | FATTR4_WORD0_FILEID
141 | FATTR4_WORD0_FS_LOCATIONS,
142 FATTR4_WORD1_MODE
143 | FATTR4_WORD1_NUMLINKS
144 | FATTR4_WORD1_OWNER
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY
151 | FATTR4_WORD1_MOUNTED_ON_FILEID
152};
153
bc4785cd 154static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 155 struct nfs4_readdir_arg *readdir)
156{
0dbb4c67 157 __be32 *start, *p;
1da177e4
LT		 158
159 BUG_ON(readdir->count < 80);
160 if (cookie > 2) {
b7ef1956 161 readdir->cookie = cookie;
1da177e4
LT		 162 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
163 return;
164 }
165
166 readdir->cookie = 0;
167 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
168 if (cookie == 2)
169 return;
170
171 /*
172 * NFSv4 servers do not return entries for '.' and '..'
173 * Therefore, we fake these entries here. We let '.'
174 * have cookie 0 and '..' have cookie 1. Note that
175 * when talking to the server, we always send cookie 0
176 * instead of 1 or 2.
177 */
0dbb4c67 178 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 179
180 if (cookie == 0) {
181 *p++ = xdr_one; /* next */
182 *p++ = xdr_zero; /* cookie, first word */
183 *p++ = xdr_one; /* cookie, second word */
184 *p++ = xdr_one; /* entry len */
185 memcpy(p, ".\0\0\0", 4); /* entry */
186 p++;
187 *p++ = xdr_one; /* bitmap length */
188 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
189 *p++ = htonl(8); /* attribute buffer length */
4e769b93 190 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 191 }
192
193 *p++ = xdr_one; /* next */
194 *p++ = xdr_zero; /* cookie, first word */
195 *p++ = xdr_two; /* cookie, second word */
196 *p++ = xdr_two; /* entry len */
197 memcpy(p, "..\0\0", 4); /* entry */
198 p++;
199 *p++ = xdr_one; /* bitmap length */
200 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
201 *p++ = htonl(8); /* attribute buffer length */
4e769b93 202 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 203
204 readdir->pgbase = (char *)p - (char *)start;
205 readdir->count -= readdir->pgbase;
206 kunmap_atomic(start, KM_USER0);
207}
208
65de872e
TM		 209static int nfs4_wait_clnt_recover(struct nfs_client *clp)
210{
211 int res;
212
213 might_sleep();
214
e005e804 215 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 216 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 217 return res;
218}
219
220static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
221{
222 int res = 0;
223
224 might_sleep();
225
226 if (*timeout <= 0)
227 *timeout = NFS4_POLL_RETRY_MIN;
228 if (*timeout > NFS4_POLL_RETRY_MAX)
229 *timeout = NFS4_POLL_RETRY_MAX;
230 schedule_timeout_killable(*timeout);
231 if (fatal_signal_pending(current))
232 res = -ERESTARTSYS;
233 *timeout <<= 1;
234 return res;
235}
236
237/* This is the error handling routine for processes that are allowed
238 * to sleep.
239 */
240static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
241{
242 struct nfs_client *clp = server->nfs_client;
9e33bed5 243 struct nfs4_state *state = exception->state;
65de872e
TM		 244 int ret = errorcode;
245
246 exception->retry = 0;
247 switch(errorcode) {
248 case 0:
249 return 0;
9e33bed5
TM		 250 case -NFS4ERR_ADMIN_REVOKED:
251 case -NFS4ERR_BAD_STATEID:
252 case -NFS4ERR_OPENMODE:
253 if (state == NULL)
254 break;
255 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 256 goto do_state_recovery;
65de872e 257 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 258 if (state == NULL)
259 break;
260 nfs4_state_mark_reclaim_reboot(clp, state);
261 case -NFS4ERR_STALE_CLIENTID:
65de872e 262 case -NFS4ERR_EXPIRED:
a2c0b9e2 263 goto do_state_recovery;
03391693 264#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 265 case -NFS4ERR_BADSESSION:
266 case -NFS4ERR_BADSLOT:
267 case -NFS4ERR_BAD_HIGH_SLOT:
268 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
269 case -NFS4ERR_DEADSESSION:
270 case -NFS4ERR_SEQ_FALSE_RETRY:
271 case -NFS4ERR_SEQ_MISORDERED:
272 dprintk("%s ERROR: %d Reset session\n", __func__,
273 errorcode);
0b9e2d41 274 nfs4_schedule_state_recovery(clp);
4745e315 275 exception->retry = 1;
b9179237 276 break;
03391693 277#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 278 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 279 if (exception->timeout > HZ) {
280 /* We have retried a decent amount, time to
281 * fail
282 */
283 ret = -EBUSY;
284 break;
285 }
65de872e
TM		 286 case -NFS4ERR_GRACE:
287 case -NFS4ERR_DELAY:
2c643488 288 case -EKEYEXPIRED:
65de872e
TM		 289 ret = nfs4_delay(server->client, &exception->timeout);
290 if (ret != 0)
291 break;
292 case -NFS4ERR_OLD_STATEID:
293 exception->retry = 1;
294 }
295 /* We failed to handle the error */
296 return nfs4_map_errors(ret);
a2c0b9e2
TM		 297do_state_recovery:
298 nfs4_schedule_state_recovery(clp);
299 ret = nfs4_wait_clnt_recover(clp);
300 if (ret == 0)
301 exception->retry = 1;
302 return ret;
65de872e
TM		 303}
304
305
452e9352 306static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 307{
1da177e4
LT		 308 spin_lock(&clp->cl_lock);
309 if (time_before(clp->cl_last_renewal,timestamp))
310 clp->cl_last_renewal = timestamp;
311 spin_unlock(&clp->cl_lock);
312}
313
452e9352
TM		 314static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
315{
316 do_renew_lease(server->nfs_client, timestamp);
317}
318
cccef3b9
AA		 319#if defined(CONFIG_NFS_V4_1)
320
e2c4ab3c
AA		 321/*
322 * nfs4_free_slot - free a slot and efficiently update slot table.
323 *
324 * freeing a slot is trivially done by clearing its respective bit
325 * in the bitmap.
326 * If the freed slotid equals highest_used_slotid we want to update it
327 * so that the server would be able to size down the slot table if needed,
328 * otherwise we know that the highest_used_slotid is still in use.
329 * When updating highest_used_slotid there may be "holes" in the bitmap
330 * so we need to scan down from highest_used_slotid to 0 looking for the now
331 * highest slotid in use.
332 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 333 *
334 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 335 */
336static void
337nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
338{
339 int slotid = free_slotid;
340
e2c4ab3c
AA		 341 /* clear used bit in bitmap */
342 __clear_bit(slotid, tbl->used_slots);
343
344 /* update highest_used_slotid when it is freed */
345 if (slotid == tbl->highest_used_slotid) {
346 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 347 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 348 tbl->highest_used_slotid = slotid;
349 else
350 tbl->highest_used_slotid = -1;
351 }
e2c4ab3c
AA		 352 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
353 free_slotid, tbl->highest_used_slotid);
354}
355
3bfb0fc5
AB		 356/*
357 * Signal state manager thread if session is drained
358 */
359static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
360{
689cf5c1
AB		 361 struct rpc_task *task;
362
a2118c33 363 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 364 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
365 if (task)
366 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 367 return;
368 }
369
370 if (ses->fc_slot_table.highest_used_slotid != -1)
371 return;
372
373 dprintk("%s COMPLETE: Session Drained\n", __func__);
374 complete(&ses->complete);
375}
376
d185a334 377static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 378{
379 struct nfs4_slot_table *tbl;
380
d185a334 381 tbl = &res->sr_session->fc_slot_table;
13615871 382 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 383 /* just wake up the next guy waiting since
384 * we may have not consumed a slot after all */
691daf3b 385 dprintk("%s: No slot\n", __func__);
35dc1d74 386 return;
13615871 387 }
ea028ac9 388
35dc1d74
TM		 389 spin_lock(&tbl->slot_tbl_lock);
390 nfs4_free_slot(tbl, res->sr_slotid);
d185a334 391 nfs41_check_drain_session_complete(res->sr_session);
35dc1d74
TM		 392 spin_unlock(&tbl->slot_tbl_lock);
393 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 394}
395
14516c3a 396static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 397{
398 unsigned long timestamp;
399 struct nfs4_slot_table *tbl;
400 struct nfs4_slot *slot;
14516c3a 401 struct nfs_client *clp;
b0df806c
AA		 402
403 /*
404 * sr_status remains 1 if an RPC level error occurred. The server
405 * may or may not have processed the sequence operation..
406 * Proceed as if the server received and processed the sequence
407 * operation.
408 */
409 if (res->sr_status == 1)
410 res->sr_status = NFS_OK;
411
412 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
413 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
414 goto out;
415
14516c3a
TM		 416 tbl = &res->sr_session->fc_slot_table;
417 slot = tbl->slots + res->sr_slotid;
418
691daf3b 419 /* Check the SEQUENCE operation status */
14516c3a
TM		 420 switch (res->sr_status) {
421 case 0:
b0df806c
AA		 422 /* Update the slot's sequence and clientid lease timer */
423 ++slot->seq_nr;
424 timestamp = res->sr_renewal_time;
14516c3a 425 clp = res->sr_session->clp;
452e9352 426 do_renew_lease(clp, timestamp);
0629e370 427 /* Check sequence flags */
7135840f
AB		 428 if (atomic_read(&clp->cl_count) > 1)
429 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
14516c3a
TM		 430 break;
431 case -NFS4ERR_DELAY:
432 /* The server detected a resend of the RPC call and
433 * returned NFS4ERR_DELAY as per Section 2.10.6.2
434 * of RFC5661.
435 */
436 dprintk("%s: slot=%d seq=%d: Operation in progress\n",
437 __func__, res->sr_slotid, slot->seq_nr);
438 goto out_retry;
439 default:
440 /* Just update the slot sequence no. */
441 ++slot->seq_nr;
b0df806c
AA		 442 }
443out:
444 /* The session may be reset by one of the error handlers. */
445 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 446 nfs41_sequence_free_slot(res);
14516c3a
TM		 447 return 1;
448out_retry:
d05dd4e9 449 if (!rpc_restart_call(task))
14516c3a
TM		 450 goto out;
451 rpc_delay(task, NFS4_POLL_RETRY_MAX);
452 return 0;
b0df806c
AA		 453}
454
14516c3a
TM		 455static int nfs4_sequence_done(struct rpc_task *task,
456 struct nfs4_sequence_res *res)
df896455 457{
14516c3a
TM		 458 if (res->sr_session == NULL)
459 return 1;
460 return nfs41_sequence_done(task, res);
df896455
TM		 461}
462
510b8175
BH		 463/*
464 * nfs4_find_slot - efficiently look for a free slot
465 *
466 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
467 * If found, we mark the slot as used, update the highest_used_slotid,
468 * and respectively set up the sequence operation args.
469 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 470 *
471 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 472 */
473static u8
40ead580 474nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 475{
476 int slotid;
477 u8 ret_id = NFS4_MAX_SLOT_TABLE;
478 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
479
510b8175
BH		 480 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
481 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
482 tbl->max_slots);
483 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
484 if (slotid >= tbl->max_slots)
485 goto out;
486 __set_bit(slotid, tbl->used_slots);
487 if (slotid > tbl->highest_used_slotid)
488 tbl->highest_used_slotid = slotid;
489 ret_id = slotid;
490out:
491 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
492 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 493 return ret_id;
494}
495
ce5039c1
AA		 496static int nfs41_setup_sequence(struct nfs4_session *session,
497 struct nfs4_sequence_args *args,
498 struct nfs4_sequence_res *res,
499 int cache_reply,
500 struct rpc_task *task)
501{
fbcd4abc
AA		 502 struct nfs4_slot *slot;
503 struct nfs4_slot_table *tbl;
504 u8 slotid;
505
506 dprintk("--> %s\n", __func__);
ce5039c1
AA		 507 /* slot already allocated? */
508 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
509 return 0;
510
ce5039c1 511 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 512 tbl = &session->fc_slot_table;
513
514 spin_lock(&tbl->slot_tbl_lock);
a2118c33 515 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 516 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 517 /*
518 * The state manager will wait until the slot table is empty.
519 * Schedule the reset thread
520 */
05f0d236 521 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 522 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 523 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 524 return -EAGAIN;
b069d94a
AA		 525 }
526
689cf5c1
AB		 527 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
528 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
529 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
530 spin_unlock(&tbl->slot_tbl_lock);
531 dprintk("%s enforce FIFO order\n", __func__);
532 return -EAGAIN;
533 }
534
40ead580 535 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 536 if (slotid == NFS4_MAX_SLOT_TABLE) {
537 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
538 spin_unlock(&tbl->slot_tbl_lock);
539 dprintk("<-- %s: no free slots\n", __func__);
540 return -EAGAIN;
541 }
542 spin_unlock(&tbl->slot_tbl_lock);
543
689cf5c1 544 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 545 slot = tbl->slots + slotid;
99fe60d0 546 args->sa_session = session;
fbcd4abc
AA		 547 args->sa_slotid = slotid;
548 args->sa_cache_this = cache_reply;
549
550 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
551
99fe60d0 552 res->sr_session = session;
fbcd4abc
AA		 553 res->sr_slotid = slotid;
554 res->sr_renewal_time = jiffies;
2a6e26cd 555 res->sr_status_flags = 0;
fbcd4abc
AA		 556 /*
557 * sr_status is only set in decode_sequence, and so will remain
558 * set to 1 if an rpc level failure occurs.
559 */
560 res->sr_status = 1;
ce5039c1
AA		 561 return 0;
562}
563
035168ab 564int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 565 struct nfs4_sequence_args *args,
566 struct nfs4_sequence_res *res,
567 int cache_reply,
568 struct rpc_task *task)
569{
035168ab 570 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 571 int ret = 0;
572
035168ab
TM		 573 if (session == NULL) {
574 args->sa_session = NULL;
575 res->sr_session = NULL;
576 goto out;
577 }
578
ce5039c1 579 dprintk("--> %s clp %p session %p sr_slotid %d\n",
035168ab 580 __func__, session->clp, session, res->sr_slotid);
ce5039c1 581
035168ab 582 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 583 task);
ce5039c1
AA		 584out:
585 dprintk("<-- %s status=%d\n", __func__, ret);
586 return ret;
587}
588
589struct nfs41_call_sync_data {
035168ab 590 const struct nfs_server *seq_server;
ce5039c1
AA		 591 struct nfs4_sequence_args *seq_args;
592 struct nfs4_sequence_res *seq_res;
593 int cache_reply;
594};
595
596static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
597{
598 struct nfs41_call_sync_data *data = calldata;
599
035168ab
TM		 600 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
601
602 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 603 data->seq_res, data->cache_reply, task))
604 return;
605 rpc_call_start(task);
606}
607
b257957e
AB		 608static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
609{
610 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
611 nfs41_call_sync_prepare(task, calldata);
612}
613
69ab40c4
AA		 614static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
615{
616 struct nfs41_call_sync_data *data = calldata;
617
14516c3a 618 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 619}
620
ce5039c1
AA		 621struct rpc_call_ops nfs41_call_sync_ops = {
622 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 623 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 624};
625
b257957e
AB		 626struct rpc_call_ops nfs41_call_priv_sync_ops = {
627 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
628 .rpc_call_done = nfs41_call_sync_done,
629};
630
035168ab 631static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 632 struct rpc_message *msg,
633 struct nfs4_sequence_args *args,
634 struct nfs4_sequence_res *res,
b257957e
AB		 635 int cache_reply,
636 int privileged)
ce5039c1
AA		 637{
638 int ret;
639 struct rpc_task *task;
640 struct nfs41_call_sync_data data = {
035168ab 641 .seq_server = server,
ce5039c1
AA		 642 .seq_args = args,
643 .seq_res = res,
644 .cache_reply = cache_reply,
645 };
646 struct rpc_task_setup task_setup = {
035168ab 647 .rpc_client = server->client,
ce5039c1
AA		 648 .rpc_message = msg,
649 .callback_ops = &nfs41_call_sync_ops,
650 .callback_data = &data
651 };
652
653 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 654 if (privileged)
655 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 656 task = rpc_run_task(&task_setup);
657 if (IS_ERR(task))
658 ret = PTR_ERR(task);
659 else {
660 ret = task->tk_status;
661 rpc_put_task(task);
662 }
663 return ret;
664}
665
cccef3b9
AA		 666int _nfs4_call_sync_session(struct nfs_server *server,
667 struct rpc_message *msg,
668 struct nfs4_sequence_args *args,
669 struct nfs4_sequence_res *res,
670 int cache_reply)
671{
035168ab 672 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 673}
674
df896455 675#else
14516c3a
TM		 676static int nfs4_sequence_done(struct rpc_task *task,
677 struct nfs4_sequence_res *res)
df896455 678{
14516c3a 679 return 1;
df896455 680}
cccef3b9
AA		 681#endif /* CONFIG_NFS_V4_1 */
682
683int _nfs4_call_sync(struct nfs_server *server,
684 struct rpc_message *msg,
685 struct nfs4_sequence_args *args,
686 struct nfs4_sequence_res *res,
687 int cache_reply)
688{
f3752975 689 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 690 return rpc_call_sync(server->client, msg, 0);
691}
692
693#define nfs4_call_sync(server, msg, args, res, cache_reply) \
97dc1359 694 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
cccef3b9
AA		 695 &(res)->seq_res, (cache_reply))
696
38478b24 697static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 698{
38478b24 699 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 700
38478b24 701 spin_lock(&dir->i_lock);
40d24704
TM		 702 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
703 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 704 nfs_force_lookup_revalidate(dir);
40d24704 705 nfsi->change_attr = cinfo->after;
38478b24 706 spin_unlock(&dir->i_lock);
1da177e4
LT		 707}
708
e56e0b78 709struct nfs4_opendata {
c6d00e63 710 struct kref kref;
e56e0b78
TM		 711 struct nfs_openargs o_arg;
712 struct nfs_openres o_res;
cdd4e68b
TM		 713 struct nfs_open_confirmargs c_arg;
714 struct nfs_open_confirmres c_res;
e56e0b78
TM		 715 struct nfs_fattr f_attr;
716 struct nfs_fattr dir_attr;
ad389da7 717 struct path path;
e56e0b78
TM		 718 struct dentry *dir;
719 struct nfs4_state_owner *owner;
aac00a8d 720 struct nfs4_state *state;
e56e0b78 721 struct iattr attrs;
26e976a8 722 unsigned long timestamp;
3e309914 723 unsigned int rpc_done : 1;
24ac23ab
TM		 724 int rpc_status;
725 int cancelled;
e56e0b78
TM		 726};
727
2ced46c2
TM		 728
729static void nfs4_init_opendata_res(struct nfs4_opendata *p)
730{
731 p->o_res.f_attr = &p->f_attr;
732 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 733 p->o_res.seqid = p->o_arg.seqid;
734 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 735 p->o_res.server = p->o_arg.server;
736 nfs_fattr_init(&p->f_attr);
737 nfs_fattr_init(&p->dir_attr);
578e4585 738 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 739}
740
ad389da7 741static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 742 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 743 const struct iattr *attrs,
744 gfp_t gfp_mask)
e56e0b78 745{
ad389da7 746 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 747 struct inode *dir = parent->d_inode;
748 struct nfs_server *server = NFS_SERVER(dir);
749 struct nfs4_opendata *p;
750
8535b2be 751 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 752 if (p == NULL)
753 goto err;
8535b2be 754 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 755 if (p->o_arg.seqid == NULL)
756 goto err_free;
f6948697
AV		 757 path_get(path);
758 p->path = *path;
e56e0b78
TM		 759 p->dir = parent;
760 p->owner = sp;
761 atomic_inc(&sp->so_count);
762 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 763 p->o_arg.open_flags = flags;
764 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 765 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 766 p->o_arg.id = sp->so_owner_id.id;
ad389da7 767 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 768 p->o_arg.server = server;
769 p->o_arg.bitmask = server->attr_bitmask;
770 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 771 if (flags & O_CREAT) {
772 u32 *s;
773
e56e0b78
TM		 774 p->o_arg.u.attrs = &p->attrs;
775 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 776 s = (u32 *) p->o_arg.u.verifier.data;
777 s[0] = jiffies;
778 s[1] = current->pid;
e56e0b78 779 }
cdd4e68b
TM		 780 p->c_arg.fh = &p->o_res.fh;
781 p->c_arg.stateid = &p->o_res.stateid;
782 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 783 nfs4_init_opendata_res(p);
c6d00e63 784 kref_init(&p->kref);
e56e0b78
TM		 785 return p;
786err_free:
787 kfree(p);
788err:
789 dput(parent);
790 return NULL;
791}
792
c6d00e63 793static void nfs4_opendata_free(struct kref *kref)
e56e0b78 794{
c6d00e63
TM		 795 struct nfs4_opendata *p = container_of(kref,
796 struct nfs4_opendata, kref);
797
798 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 799 if (p->state != NULL)
800 nfs4_put_open_state(p->state);
c6d00e63
TM		 801 nfs4_put_state_owner(p->owner);
802 dput(p->dir);
31f31db1 803 path_put(&p->path);
c6d00e63
TM		 804 kfree(p);
805}
806
807static void nfs4_opendata_put(struct nfs4_opendata *p)
808{
809 if (p != NULL)
810 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 811}
812
06f814a3
TM		 813static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
814{
06f814a3
TM		 815 int ret;
816
06f814a3 817 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 818 return ret;
819}
820
dc0b027d 821static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 822{
823 int ret = 0;
dc0b027d
TM		 824
825 if (open_mode & O_EXCL)
826 goto out;
827 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 828 case FMODE_READ:
88069f77
TM		 829 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
830 && state->n_rdonly != 0;
6ee41268
TM		 831 break;
832 case FMODE_WRITE:
88069f77
TM		 833 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
834 && state->n_wronly != 0;
6ee41268
TM		 835 break;
836 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 837 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
838 && state->n_rdwr != 0;
6ee41268 839 }
dc0b027d 840out:
6ee41268
TM		 841 return ret;
842}
843
dc0b027d 844static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 845{
dc0b027d 846 if ((delegation->type & fmode) != fmode)
aac00a8d 847 return 0;
15c831bf 848 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 849 return 0;
b7391f44 850 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 851 return 1;
852}
853
dc0b027d 854static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 855{
dc0b027d 856 switch (fmode) {
e7616923
TM		 857 case FMODE_WRITE:
858 state->n_wronly++;
859 break;
860 case FMODE_READ:
861 state->n_rdonly++;
862 break;
863 case FMODE_READ|FMODE_WRITE:
864 state->n_rdwr++;
865 }
dc0b027d 866 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 867}
868
dc0b027d 869static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 870{
871 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
872 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
873 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 874 switch (fmode) {
003707c7
TM		 875 case FMODE_READ:
876 set_bit(NFS_O_RDONLY_STATE, &state->flags);
877 break;
878 case FMODE_WRITE:
879 set_bit(NFS_O_WRONLY_STATE, &state->flags);
880 break;
881 case FMODE_READ|FMODE_WRITE:
882 set_bit(NFS_O_RDWR_STATE, &state->flags);
883 }
e7616923
TM		 884}
885
dc0b027d 886static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 887{
8bda4e4c 888 write_seqlock(&state->seqlock);
dc0b027d 889 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 890 write_sequnlock(&state->seqlock);
003707c7
TM		 891}
892
dc0b027d 893static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 894{
8bda4e4c
TM		 895 /*
896 * Protect the call to nfs4_state_set_mode_locked and
897 * serialise the stateid update
898 */
899 write_seqlock(&state->seqlock);
003707c7
TM		 900 if (deleg_stateid != NULL) {
901 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
902 set_bit(NFS_DELEGATED_STATE, &state->flags);
903 }
904 if (open_stateid != NULL)
dc0b027d 905 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 906 write_sequnlock(&state->seqlock);
907 spin_lock(&state->owner->so_lock);
dc0b027d 908 update_open_stateflags(state, fmode);
ec073428 909 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 910}
911
dc0b027d 912static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 913{
914 struct nfs_inode *nfsi = NFS_I(state->inode);
915 struct nfs_delegation *deleg_cur;
916 int ret = 0;
917
dc0b027d 918 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 919
920 rcu_read_lock();
921 deleg_cur = rcu_dereference(nfsi->delegation);
922 if (deleg_cur == NULL)
923 goto no_delegation;
924
925 spin_lock(&deleg_cur->lock);
926 if (nfsi->delegation != deleg_cur ||
dc0b027d 927 (deleg_cur->type & fmode) != fmode)
34310430
TM		 928 goto no_delegation_unlock;
929
930 if (delegation == NULL)
931 delegation = &deleg_cur->stateid;
932 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
933 goto no_delegation_unlock;
934
b7391f44 935 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 936 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 937 ret = 1;
938no_delegation_unlock:
939 spin_unlock(&deleg_cur->lock);
940no_delegation:
941 rcu_read_unlock();
942
943 if (!ret && open_stateid != NULL) {
dc0b027d 944 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 945 ret = 1;
946 }
947
948 return ret;
949}
950
951
dc0b027d 952static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 953{
954 struct nfs_delegation *delegation;
955
956 rcu_read_lock();
957 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 958 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 959 rcu_read_unlock();
960 return;
961 }
962 rcu_read_unlock();
963 nfs_inode_return_delegation(inode);
964}
965
6ee41268 966static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 967{
968 struct nfs4_state *state = opendata->state;
969 struct nfs_inode *nfsi = NFS_I(state->inode);
970 struct nfs_delegation *delegation;
dc0b027d
TM		 971 int open_mode = opendata->o_arg.open_flags & O_EXCL;
972 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 973 nfs4_stateid stateid;
974 int ret = -EAGAIN;
975
aac00a8d 976 for (;;) {
dc0b027d 977 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 978 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 979 if (can_open_cached(state, fmode, open_mode)) {
980 update_open_stateflags(state, fmode);
6ee41268 981 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 982 goto out_return_state;
983 }
984 spin_unlock(&state->owner->so_lock);
985 }
34310430
TM		 986 rcu_read_lock();
987 delegation = rcu_dereference(nfsi->delegation);
988 if (delegation == NULL ||
dc0b027d 989 !can_open_delegated(delegation, fmode)) {
34310430 990 rcu_read_unlock();
aac00a8d 991 break;
34310430 992 }
aac00a8d
TM		 993 /* Save the delegation */
994 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
995 rcu_read_unlock();
af22f94a 996 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 997 if (ret != 0)
998 goto out;
999 ret = -EAGAIN;
34310430
TM		 1000
1001 /* Try to update the stateid using the delegation */
dc0b027d 1002 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1003 goto out_return_state;
aac00a8d 1004 }
aac00a8d
TM		 1005out:
1006 return ERR_PTR(ret);
1007out_return_state:
1008 atomic_inc(&state->count);
1009 return state;
1010}
1011
24ac23ab
TM		 1012static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1013{
1014 struct inode *inode;
1015 struct nfs4_state *state = NULL;
003707c7 1016 struct nfs_delegation *delegation;
1b370bc2 1017 int ret;
24ac23ab 1018
aac00a8d 1019 if (!data->rpc_done) {
6ee41268 1020 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1021 goto out;
1022 }
1023
1b370bc2 1024 ret = -EAGAIN;
24ac23ab 1025 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1026 goto err;
24ac23ab 1027 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1028 ret = PTR_ERR(inode);
03f28e3a 1029 if (IS_ERR(inode))
1b370bc2
TM		 1030 goto err;
1031 ret = -ENOMEM;
24ac23ab
TM		 1032 state = nfs4_get_open_state(inode, data->owner);
1033 if (state == NULL)
1b370bc2 1034 goto err_put_inode;
549d6ed5 1035 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1036 int delegation_flags = 0;
1037
003707c7
TM		 1038 rcu_read_lock();
1039 delegation = rcu_dereference(NFS_I(inode)->delegation);
1040 if (delegation)
1041 delegation_flags = delegation->flags;
1042 rcu_read_unlock();
15c831bf 1043 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1044 nfs_inode_set_delegation(state->inode,
1045 data->owner->so_cred,
1046 &data->o_res);
1047 else
1048 nfs_inode_reclaim_delegation(state->inode,
1049 data->owner->so_cred,
1050 &data->o_res);
1051 }
34310430
TM		 1052
1053 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1054 data->o_arg.fmode);
24ac23ab 1055 iput(inode);
aac00a8d 1056out:
24ac23ab 1057 return state;
1b370bc2
TM		 1058err_put_inode:
1059 iput(inode);
1060err:
1061 return ERR_PTR(ret);
24ac23ab
TM		 1062}
1063
864472e9
TM		 1064static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1065{
1066 struct nfs_inode *nfsi = NFS_I(state->inode);
1067 struct nfs_open_context *ctx;
1068
1069 spin_lock(&state->inode->i_lock);
1070 list_for_each_entry(ctx, &nfsi->open_files, list) {
1071 if (ctx->state != state)
1072 continue;
1073 get_nfs_open_context(ctx);
1074 spin_unlock(&state->inode->i_lock);
1075 return ctx;
1076 }
1077 spin_unlock(&state->inode->i_lock);
1078 return ERR_PTR(-ENOENT);
1079}
1080
6f220ed5
TM		 1081static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1082{
1083 struct nfs4_opendata *opendata;
1084
8535b2be 1085 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1086 if (opendata == NULL)
1087 return ERR_PTR(-ENOMEM);
1088 opendata->state = state;
1089 atomic_inc(&state->count);
1090 return opendata;
1091}
1092
dc0b027d 1093static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1094{
2ced46c2 1095 struct nfs4_state *newstate;
864472e9
TM		 1096 int ret;
1097
dc0b027d
TM		 1098 opendata->o_arg.open_flags = 0;
1099 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1100 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1101 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1102 nfs4_init_opendata_res(opendata);
b257957e 1103 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1104 if (ret != 0)
1105 return ret;
2ced46c2 1106 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1107 if (IS_ERR(newstate))
1108 return PTR_ERR(newstate);
dc0b027d 1109 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1110 *res = newstate;
864472e9
TM		 1111 return 0;
1112}
1113
1114static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1115{
864472e9 1116 struct nfs4_state *newstate;
864472e9
TM		 1117 int ret;
1118
1119 /* memory barrier prior to reading state->n_* */
2ced46c2 1120 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1121 smp_rmb();
1122 if (state->n_rdwr != 0) {
2ced46c2 1123 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1124 if (ret != 0)
1125 return ret;
2ced46c2
TM		 1126 if (newstate != state)
1127 return -ESTALE;
864472e9
TM		 1128 }
1129 if (state->n_wronly != 0) {
2ced46c2 1130 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1131 if (ret != 0)
1132 return ret;
2ced46c2
TM		 1133 if (newstate != state)
1134 return -ESTALE;
864472e9
TM		 1135 }
1136 if (state->n_rdonly != 0) {
2ced46c2 1137 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1138 if (ret != 0)
1139 return ret;
2ced46c2
TM		 1140 if (newstate != state)
1141 return -ESTALE;
864472e9 1142 }
1ac7e2fd
TM		 1143 /*
1144 * We may have performed cached opens for all three recoveries.
1145 * Check if we need to update the current stateid.
1146 */
1147 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1148 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1149 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1150 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1151 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1152 write_sequnlock(&state->seqlock);
1ac7e2fd 1153 }
864472e9
TM		 1154 return 0;
1155}
1156
1da177e4
LT		 1157/*
1158 * OPEN_RECLAIM:
1159 * reclaim state on the server after a reboot.
1da177e4 1160 */
539cd03a 1161static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1162{
1ac7e2fd 1163 struct nfs_delegation *delegation;
864472e9 1164 struct nfs4_opendata *opendata;
dc0b027d 1165 fmode_t delegation_type = 0;
1da177e4
LT		 1166 int status;
1167
6f220ed5
TM		 1168 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1169 if (IS_ERR(opendata))
1170 return PTR_ERR(opendata);
864472e9
TM		 1171 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1172 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1173 rcu_read_lock();
1174 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1175 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1176 delegation_type = delegation->type;
1ac7e2fd 1177 rcu_read_unlock();
864472e9
TM		 1178 opendata->o_arg.u.delegation_type = delegation_type;
1179 status = nfs4_open_recover(opendata, state);
c6d00e63 1180 nfs4_opendata_put(opendata);
1da177e4
LT		 1181 return status;
1182}
1183
539cd03a 1184static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1185{
1186 struct nfs_server *server = NFS_SERVER(state->inode);
1187 struct nfs4_exception exception = { };
1188 int err;
1189 do {
539cd03a 1190 err = _nfs4_do_open_reclaim(ctx, state);
2c643488 1191 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 1192 break;
1193 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1194 } while (exception.retry);
1195 return err;
1196}
1197
864472e9
TM		 1198static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1199{
1200 struct nfs_open_context *ctx;
1201 int ret;
1202
1203 ctx = nfs4_state_find_open_context(state);
1204 if (IS_ERR(ctx))
1205 return PTR_ERR(ctx);
539cd03a 1206 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1207 put_nfs_open_context(ctx);
1208 return ret;
1209}
1210
13437e12 1211static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1212{
e56e0b78 1213 struct nfs4_opendata *opendata;
864472e9 1214 int ret;
1da177e4 1215
6f220ed5
TM		 1216 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1217 if (IS_ERR(opendata))
1218 return PTR_ERR(opendata);
e56e0b78 1219 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1220 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1221 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1222 ret = nfs4_open_recover(opendata, state);
c6d00e63 1223 nfs4_opendata_put(opendata);
864472e9 1224 return ret;
1da177e4
LT		 1225}
1226
13437e12 1227int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1228{
1229 struct nfs4_exception exception = { };
539cd03a 1230 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1231 int err;
1232 do {
13437e12 1233 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1234 switch (err) {
1235 case 0:
965b5d67
TM		 1236 case -ENOENT:
1237 case -ESTALE:
1238 goto out;
bcfa49f6
RL		 1239 case -NFS4ERR_BADSESSION:
1240 case -NFS4ERR_BADSLOT:
1241 case -NFS4ERR_BAD_HIGH_SLOT:
1242 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1243 case -NFS4ERR_DEADSESSION:
1244 nfs4_schedule_state_recovery(
1245 server->nfs_client);
1246 goto out;
1da177e4
LT		 1247 case -NFS4ERR_STALE_CLIENTID:
1248 case -NFS4ERR_STALE_STATEID:
1249 case -NFS4ERR_EXPIRED:
1250 /* Don't recall a delegation if it was lost */
7539bbab 1251 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1252 goto out;
1253 case -ERESTARTSYS:
1254 /*
1255 * The show must go on: exit, but mark the
1256 * stateid as needing recovery.
1257 */
1258 case -NFS4ERR_ADMIN_REVOKED:
1259 case -NFS4ERR_BAD_STATEID:
1260 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1261 case -ENOMEM:
1262 err = 0;
1263 goto out;
1da177e4
LT		 1264 }
1265 err = nfs4_handle_exception(server, err, &exception);
1266 } while (exception.retry);
965b5d67 1267out:
1da177e4
LT		 1268 return err;
1269}
1270
cdd4e68b
TM		 1271static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1272{
1273 struct nfs4_opendata *data = calldata;
1274
1275 data->rpc_status = task->tk_status;
26e976a8 1276 if (data->rpc_status == 0) {
cdd4e68b
TM		 1277 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1278 sizeof(data->o_res.stateid.data));
bb22629e 1279 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1280 renew_lease(data->o_res.server, data->timestamp);
3e309914 1281 data->rpc_done = 1;
26e976a8 1282 }
cdd4e68b
TM		 1283}
1284
1285static void nfs4_open_confirm_release(void *calldata)
1286{
1287 struct nfs4_opendata *data = calldata;
1288 struct nfs4_state *state = NULL;
1289
1290 /* If this request hasn't been cancelled, do nothing */
1291 if (data->cancelled == 0)
1292 goto out_free;
1293 /* In case of error, no cleanup! */
3e309914 1294 if (!data->rpc_done)
cdd4e68b 1295 goto out_free;
cdd4e68b 1296 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1297 if (!IS_ERR(state))
dc0b027d 1298 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1299out_free:
c6d00e63 1300 nfs4_opendata_put(data);
cdd4e68b
TM		 1301}
1302
1303static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1304 .rpc_call_done = nfs4_open_confirm_done,
1305 .rpc_release = nfs4_open_confirm_release,
1306};
1307
1308/*
1309 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1310 */
1311static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1312{
1313 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1314 struct rpc_task *task;
5138fde0
TM		 1315 struct rpc_message msg = {
1316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1317 .rpc_argp = &data->c_arg,
1318 .rpc_resp = &data->c_res,
1319 .rpc_cred = data->owner->so_cred,
1320 };
c970aa85
TM		 1321 struct rpc_task_setup task_setup_data = {
1322 .rpc_client = server->client,
5138fde0 1323 .rpc_message = &msg,
c970aa85
TM		 1324 .callback_ops = &nfs4_open_confirm_ops,
1325 .callback_data = data,
101070ca 1326 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1327 .flags = RPC_TASK_ASYNC,
1328 };
1da177e4
LT		 1329 int status;
1330
c6d00e63 1331 kref_get(&data->kref);
3e309914
TM		 1332 data->rpc_done = 0;
1333 data->rpc_status = 0;
5138fde0 1334 data->timestamp = jiffies;
c970aa85 1335 task = rpc_run_task(&task_setup_data);
7a1218a2 1336 if (IS_ERR(task))
cdd4e68b 1337 return PTR_ERR(task);
cdd4e68b
TM		 1338 status = nfs4_wait_for_completion_rpc_task(task);
1339 if (status != 0) {
1340 data->cancelled = 1;
1341 smp_wmb();
1342 } else
1343 status = data->rpc_status;
e6b3c4db 1344 rpc_put_task(task);
1da177e4
LT		 1345 return status;
1346}
1347
24ac23ab 1348static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1349{
24ac23ab
TM		 1350 struct nfs4_opendata *data = calldata;
1351 struct nfs4_state_owner *sp = data->owner;
5138fde0 1352
24ac23ab
TM		 1353 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1354 return;
aac00a8d
TM		 1355 /*
1356 * Check if we still need to send an OPEN call, or if we can use
1357 * a delegation instead.
1358 */
1359 if (data->state != NULL) {
1360 struct nfs_delegation *delegation;
1361
dc0b027d 1362 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1363 goto out_no_action;
aac00a8d
TM		 1364 rcu_read_lock();
1365 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1366 if (delegation != NULL &&
15c831bf 1367 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1368 rcu_read_unlock();
6ee41268 1369 goto out_no_action;
aac00a8d
TM		 1370 }
1371 rcu_read_unlock();
1372 }
24ac23ab 1373 /* Update sequence id. */
9f958ab8 1374 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1375 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1376 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1377 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1378 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1379 }
26e976a8 1380 data->timestamp = jiffies;
035168ab 1381 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1382 &data->o_arg.seq_args,
1383 &data->o_res.seq_res, 1, task))
1384 return;
5138fde0 1385 rpc_call_start(task);
6ee41268
TM		 1386 return;
1387out_no_action:
1388 task->tk_action = NULL;
1389
24ac23ab 1390}
1da177e4 1391
b257957e
AB		 1392static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1393{
1394 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1395 nfs4_open_prepare(task, calldata);
1396}
1397
24ac23ab
TM		 1398static void nfs4_open_done(struct rpc_task *task, void *calldata)
1399{
1400 struct nfs4_opendata *data = calldata;
1da177e4 1401
24ac23ab 1402 data->rpc_status = task->tk_status;
d898528c 1403
14516c3a
TM		 1404 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1405 return;
d898528c 1406
24ac23ab
TM		 1407 if (task->tk_status == 0) {
1408 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1409 case S_IFREG:
1410 break;
1411 case S_IFLNK:
24ac23ab 1412 data->rpc_status = -ELOOP;
6f926b5b
TM		 1413 break;
1414 case S_IFDIR:
24ac23ab 1415 data->rpc_status = -EISDIR;
6f926b5b
TM		 1416 break;
1417 default:
24ac23ab 1418 data->rpc_status = -ENOTDIR;
6f926b5b 1419 }
26e976a8 1420 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1421 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1422 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1423 }
3e309914 1424 data->rpc_done = 1;
24ac23ab 1425}
6f926b5b 1426
24ac23ab
TM		 1427static void nfs4_open_release(void *calldata)
1428{
1429 struct nfs4_opendata *data = calldata;
1430 struct nfs4_state *state = NULL;
1431
1432 /* If this request hasn't been cancelled, do nothing */
1433 if (data->cancelled == 0)
1434 goto out_free;
1435 /* In case of error, no cleanup! */
3e309914 1436 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1437 goto out_free;
1438 /* In case we need an open_confirm, no cleanup! */
1439 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1440 goto out_free;
24ac23ab 1441 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1442 if (!IS_ERR(state))
dc0b027d 1443 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1444out_free:
c6d00e63 1445 nfs4_opendata_put(data);
24ac23ab
TM		 1446}
1447
1448static const struct rpc_call_ops nfs4_open_ops = {
1449 .rpc_call_prepare = nfs4_open_prepare,
1450 .rpc_call_done = nfs4_open_done,
1451 .rpc_release = nfs4_open_release,
1452};
1453
b257957e
AB		 1454static const struct rpc_call_ops nfs4_recover_open_ops = {
1455 .rpc_call_prepare = nfs4_recover_open_prepare,
1456 .rpc_call_done = nfs4_open_done,
1457 .rpc_release = nfs4_open_release,
1458};
1459
1460static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1461{
1462 struct inode *dir = data->dir->d_inode;
1463 struct nfs_server *server = NFS_SERVER(dir);
1464 struct nfs_openargs *o_arg = &data->o_arg;
1465 struct nfs_openres *o_res = &data->o_res;
1466 struct rpc_task *task;
5138fde0
TM		 1467 struct rpc_message msg = {
1468 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1469 .rpc_argp = o_arg,
1470 .rpc_resp = o_res,
1471 .rpc_cred = data->owner->so_cred,
1472 };
c970aa85
TM		 1473 struct rpc_task_setup task_setup_data = {
1474 .rpc_client = server->client,
5138fde0 1475 .rpc_message = &msg,
c970aa85
TM		 1476 .callback_ops = &nfs4_open_ops,
1477 .callback_data = data,
101070ca 1478 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1479 .flags = RPC_TASK_ASYNC,
1480 };
24ac23ab
TM		 1481 int status;
1482
c6d00e63 1483 kref_get(&data->kref);
3e309914
TM		 1484 data->rpc_done = 0;
1485 data->rpc_status = 0;
2ced46c2 1486 data->cancelled = 0;
b257957e
AB		 1487 if (isrecover)
1488 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1489 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1490 if (IS_ERR(task))
1491 return PTR_ERR(task);
1492 status = nfs4_wait_for_completion_rpc_task(task);
1493 if (status != 0) {
1494 data->cancelled = 1;
1495 smp_wmb();
1496 } else
1497 status = data->rpc_status;
1498 rpc_put_task(task);
1499
1500 return status;
1501}
1502
1503static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1504{
1505 struct inode *dir = data->dir->d_inode;
1506 struct nfs_openres *o_res = &data->o_res;
1507 int status;
1508
1509 status = nfs4_run_open_task(data, 1);
1510 if (status != 0 || !data->rpc_done)
1511 return status;
1512
1513 nfs_refresh_inode(dir, o_res->dir_attr);
1514
1515 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1516 status = _nfs4_proc_open_confirm(data);
1517 if (status != 0)
1518 return status;
1519 }
1520
1521 return status;
1522}
1523
1524/*
1525 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1526 */
1527static int _nfs4_proc_open(struct nfs4_opendata *data)
1528{
1529 struct inode *dir = data->dir->d_inode;
1530 struct nfs_server *server = NFS_SERVER(dir);
1531 struct nfs_openargs *o_arg = &data->o_arg;
1532 struct nfs_openres *o_res = &data->o_res;
1533 int status;
1534
1535 status = nfs4_run_open_task(data, 0);
3e309914 1536 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1537 return status;
1538
56ae19f3
TM		 1539 if (o_arg->open_flags & O_CREAT) {
1540 update_changeattr(dir, &o_res->cinfo);
1541 nfs_post_op_update_inode(dir, o_res->dir_attr);
1542 } else
1543 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1544 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1545 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1546 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1547 status = _nfs4_proc_open_confirm(data);
1da177e4 1548 if (status != 0)
24ac23ab 1549 return status;
1da177e4
LT		 1550 }
1551 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1552 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1553 return 0;
1da177e4
LT		 1554}
1555
10afec90 1556static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1557{
7539bbab 1558 struct nfs_client *clp = server->nfs_client;
a78cb57a 1559 unsigned int loop;
6b30954e 1560 int ret;
58d9714a 1561
a78cb57a 1562 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1563 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1564 if (ret != 0)
a78cb57a 1565 break;
e598d843
TM		 1566 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1567 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1568 break;
58d9714a 1569 nfs4_schedule_state_recovery(clp);
a78cb57a 1570 ret = -EIO;
6b30954e 1571 }
a78cb57a 1572 return ret;
58d9714a
TM		 1573}
1574
1da177e4
LT		 1575/*
1576 * OPEN_EXPIRED:
1577 * reclaim state on the server after a network partition.
1578 * Assumes caller holds the appropriate lock
1579 */
539cd03a 1580static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1581{
e56e0b78 1582 struct nfs4_opendata *opendata;
864472e9 1583 int ret;
1da177e4 1584
6f220ed5
TM		 1585 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1586 if (IS_ERR(opendata))
1587 return PTR_ERR(opendata);
864472e9 1588 ret = nfs4_open_recover(opendata, state);
35d05778 1589 if (ret == -ESTALE)
539cd03a 1590 d_drop(ctx->path.dentry);
c6d00e63 1591 nfs4_opendata_put(opendata);
864472e9 1592 return ret;
1da177e4
LT		 1593}
1594
a9ed2e25 1595static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1596{
539cd03a 1597 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1598 struct nfs4_exception exception = { };
1599 int err;
1600
1601 do {
539cd03a 1602 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1603 switch (err) {
1604 default:
1605 goto out;
1606 case -NFS4ERR_GRACE:
1607 case -NFS4ERR_DELAY:
2c643488 1608 case -EKEYEXPIRED:
a9ed2e25
TM		 1609 nfs4_handle_exception(server, err, &exception);
1610 err = 0;
1611 }
202b50dc 1612 } while (exception.retry);
a9ed2e25 1613out:
202b50dc
TM		 1614 return err;
1615}
1616
1da177e4
LT		 1617static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1618{
1da177e4 1619 struct nfs_open_context *ctx;
864472e9 1620 int ret;
1da177e4 1621
864472e9
TM		 1622 ctx = nfs4_state_find_open_context(state);
1623 if (IS_ERR(ctx))
1624 return PTR_ERR(ctx);
539cd03a 1625 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1626 put_nfs_open_context(ctx);
1627 return ret;
1da177e4
LT		 1628}
1629
aa53ed54
JL		 1630/*
1631 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1632 * fields corresponding to attributes that were used to store the verifier.
1633 * Make sure we clobber those fields in the later setattr call
1634 */
1635static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1636{
1637 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1638 !(sattr->ia_valid & ATTR_ATIME_SET))
1639 sattr->ia_valid |= ATTR_ATIME;
1640
1641 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1642 !(sattr->ia_valid & ATTR_MTIME_SET))
1643 sattr->ia_valid |= ATTR_MTIME;
1644}
1645
1da177e4 1646/*
24ac23ab 1647 * Returns a referenced nfs4_state
1da177e4 1648 */
dc0b027d 1649static 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		 1650{
1651 struct nfs4_state_owner *sp;
1652 struct nfs4_state *state = NULL;
1653 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1654 struct nfs4_opendata *opendata;
aac00a8d 1655 int status;
1da177e4
LT		 1656
1657 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1658 status = -ENOMEM;
1659 if (!(sp = nfs4_get_state_owner(server, cred))) {
1660 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1661 goto out_err;
1662 }
58d9714a
TM		 1663 status = nfs4_recover_expired_lease(server);
1664 if (status != 0)
b4454fe1 1665 goto err_put_state_owner;
aac00a8d 1666 if (path->dentry->d_inode != NULL)
dc0b027d 1667 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1668 status = -ENOMEM;
8535b2be 1669 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1670 if (opendata == NULL)
95d35cb4 1671 goto err_put_state_owner;
1da177e4 1672
aac00a8d
TM		 1673 if (path->dentry->d_inode != NULL)
1674 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1675
24ac23ab 1676 status = _nfs4_proc_open(opendata);
1da177e4 1677 if (status != 0)
c6d00e63 1678 goto err_opendata_put;
1da177e4 1679
24ac23ab 1680 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1681 status = PTR_ERR(state);
1682 if (IS_ERR(state))
c6d00e63 1683 goto err_opendata_put;
0df5dd4a 1684 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1685 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1686
1687 if (opendata->o_arg.open_flags & O_EXCL) {
1688 nfs4_exclusive_attrset(opendata, sattr);
1689
1690 nfs_fattr_init(opendata->o_res.f_attr);
1691 status = nfs4_do_setattr(state->inode, cred,
1692 opendata->o_res.f_attr, sattr,
1693 state);
1694 if (status == 0)
1695 nfs_setattr_update_inode(state->inode, sattr);
1696 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1697 }
c6d00e63 1698 nfs4_opendata_put(opendata);
1da177e4 1699 nfs4_put_state_owner(sp);
1da177e4
LT		 1700 *res = state;
1701 return 0;
c6d00e63
TM		 1702err_opendata_put:
1703 nfs4_opendata_put(opendata);
e56e0b78
TM		 1704err_put_state_owner:
1705 nfs4_put_state_owner(sp);
1da177e4 1706out_err:
1da177e4
LT		 1707 *res = NULL;
1708 return status;
1709}
1710
1711
dc0b027d 1712static 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		 1713{
1714 struct nfs4_exception exception = { };
1715 struct nfs4_state *res;
1716 int status;
1717
1718 do {
dc0b027d 1719 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1720 if (status == 0)
1721 break;
1722 /* NOTE: BAD_SEQID means the server and client disagree about the
1723 * book-keeping w.r.t. state-changing operations
1724 * (OPEN/CLOSE/LOCK/LOCKU...)
1725 * It is actually a sign of a bug on the client or on the server.
1726 *
1727 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1728 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1729 * have unhashed the old state_owner for us, and that we can
1730 * therefore safely retry using a new one. We should still warn
1731 * the user though...
1732 */
1733 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1734 printk(KERN_WARNING "NFS: v4 server %s "
1735 " returned a bad sequence-id error!\n",
1736 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1737 exception.retry = 1;
1738 continue;
1739 }
550f5747
TM		 1740 /*
1741 * BAD_STATEID on OPEN means that the server cancelled our
1742 * state before it received the OPEN_CONFIRM.
1743 * Recover by retrying the request as per the discussion
1744 * on Page 181 of RFC3530.
1745 */
1746 if (status == -NFS4ERR_BAD_STATEID) {
1747 exception.retry = 1;
1748 continue;
1749 }
aac00a8d
TM		 1750 if (status == -EAGAIN) {
1751 /* We must have found a delegation */
1752 exception.retry = 1;
1753 continue;
1754 }
1da177e4
LT		 1755 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1756 status, &exception));
1757 } while (exception.retry);
1758 return res;
1759}
1760
659bfcd6
TM		 1761static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1762 struct nfs_fattr *fattr, struct iattr *sattr,
1763 struct nfs4_state *state)
1da177e4 1764{
3e4f6290 1765 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1766 struct nfs_setattrargs arg = {
3e4f6290 1767 .fh = NFS_FH(inode),
1da177e4
LT		 1768 .iap = sattr,
1769 .server = server,
1770 .bitmask = server->attr_bitmask,
1771 };
1772 struct nfs_setattrres res = {
1773 .fattr = fattr,
1774 .server = server,
1775 };
1776 struct rpc_message msg = {
659bfcd6
TM		 1777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1778 .rpc_argp = &arg,
1779 .rpc_resp = &res,
1780 .rpc_cred = cred,
1da177e4 1781 };
26e976a8 1782 unsigned long timestamp = jiffies;
65e4308d 1783 int status;
1da177e4 1784
0e574af1 1785 nfs_fattr_init(fattr);
1da177e4 1786
3e4f6290
TM		 1787 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1788 /* Use that stateid */
1789 } else if (state != NULL) {
77041ed9 1790 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1791 } else
1da177e4
LT		 1792 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1793
cccef3b9 1794 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1795 if (status == 0 && state != NULL)
1796 renew_lease(server, timestamp);
65e4308d 1797 return status;
1da177e4
LT		 1798}
1799
659bfcd6
TM		 1800static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1801 struct nfs_fattr *fattr, struct iattr *sattr,
1802 struct nfs4_state *state)
1da177e4 1803{
3e4f6290 1804 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1805 struct nfs4_exception exception = { };
1806 int err;
1807 do {
1808 err = nfs4_handle_exception(server,
659bfcd6 1809 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1810 &exception);
1811 } while (exception.retry);
1812 return err;
1813}
1814
1815struct nfs4_closedata {
4a35bd41 1816 struct path path;
1da177e4
LT		 1817 struct inode *inode;
1818 struct nfs4_state *state;
1819 struct nfs_closeargs arg;
1820 struct nfs_closeres res;
516a6af6 1821 struct nfs_fattr fattr;
26e976a8 1822 unsigned long timestamp;
1da177e4
LT		 1823};
1824
963d8fe5 1825static void nfs4_free_closedata(void *data)
9512135d 1826{
963d8fe5
TM		 1827 struct nfs4_closedata *calldata = data;
1828 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1829
1830 nfs4_put_open_state(calldata->state);
1831 nfs_free_seqid(calldata->arg.seqid);
9512135d 1832 nfs4_put_state_owner(sp);
31f31db1 1833 path_put(&calldata->path);
9512135d
TM		 1834 kfree(calldata);
1835}
1836
88069f77
TM		 1837static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1838 fmode_t fmode)
1839{
1840 spin_lock(&state->owner->so_lock);
1841 if (!(fmode & FMODE_READ))
1842 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1843 if (!(fmode & FMODE_WRITE))
1844 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1845 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1846 spin_unlock(&state->owner->so_lock);
1847}
1848
963d8fe5 1849static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1850{
963d8fe5 1851 struct nfs4_closedata *calldata = data;
1da177e4 1852 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1853 struct nfs_server *server = NFS_SERVER(calldata->inode);
1854
14516c3a
TM		 1855 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1856 return;
1da177e4
LT		 1857 /* hmm. we are done with the inode, and in the process of freeing
1858 * the state_owner. we keep this around to process errors
1859 */
1da177e4
LT		 1860 switch (task->tk_status) {
1861 case 0:
45328c35 1862 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1863 renew_lease(server, calldata->timestamp);
88069f77
TM		 1864 nfs4_close_clear_stateid_flags(state,
1865 calldata->arg.fmode);
1da177e4
LT		 1866 break;
1867 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1868 case -NFS4ERR_OLD_STATEID:
1869 case -NFS4ERR_BAD_STATEID:
1da177e4 1870 case -NFS4ERR_EXPIRED:
dc0b027d 1871 if (calldata->arg.fmode == 0)
9e33bed5 1872 break;
1da177e4 1873 default:
72211dbe
TM		 1874 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1875 rpc_restart_call_prepare(task);
1da177e4 1876 }
72211dbe 1877 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1878 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1879}
1880
4ce70ada 1881static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1882{
4ce70ada 1883 struct nfs4_closedata *calldata = data;
9512135d 1884 struct nfs4_state *state = calldata->state;
88069f77 1885 int call_close = 0;
9512135d 1886
963d8fe5 1887 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1888 return;
003707c7 1889
88069f77
TM		 1890 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1891 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1892 spin_lock(&state->owner->so_lock);
003707c7 1893 /* Calculate the change in open mode */
e7616923 1894 if (state->n_rdwr == 0) {
003707c7 1895 if (state->n_rdonly == 0) {
88069f77
TM		 1896 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1897 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1898 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1899 }
1900 if (state->n_wronly == 0) {
88069f77
TM		 1901 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1902 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1903 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1904 }
e7616923 1905 }
4cecb76f 1906 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1907
1908 if (!call_close) {
963d8fe5
TM		 1909 /* Note: exit _without_ calling nfs4_close_done */
1910 task->tk_action = NULL;
9512135d
TM		 1911 return;
1912 }
88069f77
TM		 1913
1914 if (calldata->arg.fmode == 0)
1915 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1916
516a6af6 1917 nfs_fattr_init(calldata->res.fattr);
26e976a8 1918 calldata->timestamp = jiffies;
035168ab 1919 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1920 &calldata->arg.seq_args, &calldata->res.seq_res,
1921 1, task))
1922 return;
5138fde0 1923 rpc_call_start(task);
1da177e4
LT		 1924}
1925
963d8fe5 1926static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1927 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1928 .rpc_call_done = nfs4_close_done,
1929 .rpc_release = nfs4_free_closedata,
1930};
1931
1da177e4
LT		 1932/*
1933 * It is possible for data to be read/written from a mem-mapped file
1934 * after the sys_close call (which hits the vfs layer as a flush).
1935 * This means that we can't safely call nfsv4 close on a file until
1936 * the inode is cleared. This in turn means that we are not good
1937 * NFSv4 citizens - we do not indicate to the server to update the file's
1938 * share state even when we are done with one of the three share
1939 * stateid's in the inode.
1940 *
1941 * NOTE: Caller must be holding the sp->so_owner semaphore!
1942 */
8535b2be 1943int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 1944{
4a35bd41 1945 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1946 struct nfs4_closedata *calldata;
b39e625b
TM		 1947 struct nfs4_state_owner *sp = state->owner;
1948 struct rpc_task *task;
5138fde0
TM		 1949 struct rpc_message msg = {
1950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1951 .rpc_cred = state->owner->so_cred,
1952 };
c970aa85
TM		 1953 struct rpc_task_setup task_setup_data = {
1954 .rpc_client = server->client,
5138fde0 1955 .rpc_message = &msg,
c970aa85 1956 .callback_ops = &nfs4_close_ops,
101070ca 1957 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1958 .flags = RPC_TASK_ASYNC,
1959 };
9512135d 1960 int status = -ENOMEM;
1da177e4 1961
8535b2be 1962 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 1963 if (calldata == NULL)
9512135d 1964 goto out;
4a35bd41 1965 calldata->inode = state->inode;
1da177e4 1966 calldata->state = state;
4a35bd41 1967 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1968 calldata->arg.stateid = &state->open_stateid;
1da177e4 1969 /* Serialization for the sequence id */
8535b2be 1970 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 1971 if (calldata->arg.seqid == NULL)
1972 goto out_free_calldata;
dc0b027d 1973 calldata->arg.fmode = 0;
a65318bf 1974 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1975 calldata->res.fattr = &calldata->fattr;
c1d51931 1976 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1977 calldata->res.server = server;
5f7dbd5c 1978 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
f6948697
AV		 1979 path_get(path);
1980 calldata->path = *path;
9512135d 1981
5138fde0
TM		 1982 msg.rpc_argp = &calldata->arg,
1983 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1984 task_setup_data.callback_data = calldata;
1985 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1986 if (IS_ERR(task))
1987 return PTR_ERR(task);
a49c3c77
TM		 1988 status = 0;
1989 if (wait)
1990 status = rpc_wait_for_completion_task(task);
b39e625b 1991 rpc_put_task(task);
a49c3c77 1992 return status;
9512135d
TM		 1993out_free_calldata:
1994 kfree(calldata);
1995out:
b39e625b
TM		 1996 nfs4_put_open_state(state);
1997 nfs4_put_state_owner(sp);
9512135d 1998 return status;
1da177e4
LT		 1999}
2000
2b484297 2001static struct inode *
cd9a1c0e 2002nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2003{
1da177e4 2004 struct nfs4_state *state;
1da177e4 2005
565277f6 2006 /* Protect against concurrent sillydeletes */
cd9a1c0e 2007 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2008 if (IS_ERR(state))
2009 return ERR_CAST(state);
cd9a1c0e 2010 ctx->state = state;
f46e0bd3 2011 return igrab(state->inode);
1da177e4
LT		 2012}
2013
1185a552 2014static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2015{
2016 if (ctx->state == NULL)
2017 return;
2018 if (is_sync)
2019 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2020 else
2021 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2022}
1da177e4
LT		 2023
2024static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2025{
43652ad5
BH		 2026 struct nfs4_server_caps_arg args = {
2027 .fhandle = fhandle,
2028 };
1da177e4
LT		 2029 struct nfs4_server_caps_res res = {};
2030 struct rpc_message msg = {
2031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2032 .rpc_argp = &args,
1da177e4
LT		 2033 .rpc_resp = &res,
2034 };
2035 int status;
2036
cccef3b9 2037 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2038 if (status == 0) {
2039 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2040 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2041 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2042 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2043 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2044 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2045 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2046 server->caps |= NFS_CAP_ACLS;
2047 if (res.has_links != 0)
2048 server->caps |= NFS_CAP_HARDLINKS;
2049 if (res.has_symlinks != 0)
2050 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2051 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2052 server->caps |= NFS_CAP_FILEID;
2053 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2054 server->caps |= NFS_CAP_MODE;
2055 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2056 server->caps |= NFS_CAP_NLINK;
2057 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2058 server->caps |= NFS_CAP_OWNER;
2059 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2060 server->caps |= NFS_CAP_OWNER_GROUP;
2061 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2062 server->caps |= NFS_CAP_ATIME;
2063 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2064 server->caps |= NFS_CAP_CTIME;
2065 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2066 server->caps |= NFS_CAP_MTIME;
2067
a65318bf
TM		 2068 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2069 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2070 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2071 server->acl_bitmask = res.acl_bitmask;
2072 }
cccef3b9 2073
1da177e4
LT		 2074 return status;
2075}
2076
55a97593 2077int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2078{
2079 struct nfs4_exception exception = { };
2080 int err;
2081 do {
2082 err = nfs4_handle_exception(server,
2083 _nfs4_server_capabilities(server, fhandle),
2084 &exception);
2085 } while (exception.retry);
2086 return err;
2087}
2088
2089static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2090 struct nfs_fsinfo *info)
2091{
1da177e4
LT		 2092 struct nfs4_lookup_root_arg args = {
2093 .bitmask = nfs4_fattr_bitmap,
2094 };
2095 struct nfs4_lookup_res res = {
2096 .server = server,
0e574af1 2097 .fattr = info->fattr,
1da177e4
LT		 2098 .fh = fhandle,
2099 };
2100 struct rpc_message msg = {
2101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2102 .rpc_argp = &args,
2103 .rpc_resp = &res,
2104 };
008f55d0 2105
0e574af1 2106 nfs_fattr_init(info->fattr);
fccba804 2107 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2108}
2109
2110static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2111 struct nfs_fsinfo *info)
2112{
2113 struct nfs4_exception exception = { };
2114 int err;
2115 do {
2116 err = nfs4_handle_exception(server,
2117 _nfs4_lookup_root(server, fhandle, info),
2118 &exception);
2119 } while (exception.retry);
2120 return err;
2121}
2122
54ceac45
DH		 2123/*
2124 * get the file handle for the "/" directory on the server
2125 */
1da177e4 2126static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2127 struct nfs_fsinfo *info)
1da177e4 2128{
1da177e4
LT		 2129 int status;
2130
1da177e4 2131 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2132 if (status == 0)
2133 status = nfs4_server_capabilities(server, fhandle);
2134 if (status == 0)
2135 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2136 return nfs4_map_errors(status);
1da177e4
LT		 2137}
2138
6b97fd3d
MN		 2139/*
2140 * Get locations and (maybe) other attributes of a referral.
2141 * Note that we'll actually follow the referral later when
2142 * we detect fsid mismatch in inode revalidation
2143 */
56659e99 2144static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2145{
2146 int status = -ENOMEM;
2147 struct page *page = NULL;
2148 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2149
2150 page = alloc_page(GFP_KERNEL);
2151 if (page == NULL)
2152 goto out;
2153 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2154 if (locations == NULL)
2155 goto out;
2156
c228fd3a 2157 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2158 if (status != 0)
2159 goto out;
2160 /* Make sure server returned a different fsid for the referral */
2161 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2162 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2163 status = -EIO;
2164 goto out;
2165 }
2166
2167 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2168 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2169 if (!fattr->mode)
2170 fattr->mode = S_IFDIR;
2171 memset(fhandle, 0, sizeof(struct nfs_fh));
2172out:
2173 if (page)
2174 __free_page(page);
5d7ca35a 2175 kfree(locations);
6b97fd3d
MN		 2176 return status;
2177}
2178
1da177e4
LT		 2179static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2180{
2181 struct nfs4_getattr_arg args = {
2182 .fh = fhandle,
2183 .bitmask = server->attr_bitmask,
2184 };
2185 struct nfs4_getattr_res res = {
2186 .fattr = fattr,
2187 .server = server,
2188 };
2189 struct rpc_message msg = {
2190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2191 .rpc_argp = &args,
2192 .rpc_resp = &res,
2193 };
2194
0e574af1 2195 nfs_fattr_init(fattr);
cccef3b9 2196 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2197}
2198
2199static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2200{
2201 struct nfs4_exception exception = { };
2202 int err;
2203 do {
2204 err = nfs4_handle_exception(server,
2205 _nfs4_proc_getattr(server, fhandle, fattr),
2206 &exception);
2207 } while (exception.retry);
2208 return err;
2209}
2210
2211/*
2212 * The file is not closed if it is opened due to the a request to change
2213 * the size of the file. The open call will not be needed once the
2214 * VFS layer lookup-intents are implemented.
2215 *
2216 * Close is called when the inode is destroyed.
2217 * If we haven't opened the file for O_WRONLY, we
2218 * need to in the size_change case to obtain a stateid.
2219 *
2220 * Got race?
2221 * Because OPEN is always done by name in nfsv4, it is
2222 * possible that we opened a different file by the same
2223 * name. We can recognize this race condition, but we
2224 * can't do anything about it besides returning an error.
2225 *
2226 * This will be fixed with VFS changes (lookup-intent).
2227 */
2228static int
2229nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2230 struct iattr *sattr)
2231{
08e9eac4 2232 struct inode *inode = dentry->d_inode;
659bfcd6 2233 struct rpc_cred *cred = NULL;
d530838b 2234 struct nfs4_state *state = NULL;
1da177e4
LT		 2235 int status;
2236
0e574af1 2237 nfs_fattr_init(fattr);
1da177e4 2238
d530838b 2239 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2240 if (sattr->ia_valid & ATTR_FILE) {
2241 struct nfs_open_context *ctx;
2242
2243 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2244 if (ctx) {
2245 cred = ctx->cred;
2246 state = ctx->state;
2247 }
659bfcd6 2248 }
08e9eac4 2249
659bfcd6 2250 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2251 if (status == 0)
2252 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2253 return status;
2254}
2255
56659e99
TM		 2256static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2257 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2258 struct nfs_fattr *fattr)
2259{
2260 int status;
2261 struct nfs4_lookup_arg args = {
2262 .bitmask = server->attr_bitmask,
2263 .dir_fh = dirfh,
2264 .name = name,
2265 };
2266 struct nfs4_lookup_res res = {
2267 .server = server,
2268 .fattr = fattr,
2269 .fh = fhandle,
2270 };
2271 struct rpc_message msg = {
2272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2273 .rpc_argp = &args,
2274 .rpc_resp = &res,
2275 };
2276
2277 nfs_fattr_init(fattr);
2278
2279 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2280 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2281 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2282 return status;
2283}
2284
2285static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2286 struct qstr *name, struct nfs_fh *fhandle,
2287 struct nfs_fattr *fattr)
2288{
2289 struct nfs4_exception exception = { };
2290 int err;
2291 do {
4e56e082
TM		 2292 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2293 /* FIXME: !!!! */
2294 if (err == -NFS4ERR_MOVED) {
2295 err = -EREMOTE;
2296 break;
2297 }
2298 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2299 } while (exception.retry);
2300 return err;
2301}
2302
56659e99 2303static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2304 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2305{
4e56e082 2306 int status;
1da177e4
LT		 2307
2308 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2309 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2310 if (status == -NFS4ERR_MOVED)
2311 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2312 dprintk("NFS reply lookup: %d\n", status);
2313 return status;
2314}
2315
2316static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2317{
2318 struct nfs4_exception exception = { };
2319 int err;
2320 do {
2321 err = nfs4_handle_exception(NFS_SERVER(dir),
2322 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2323 &exception);
2324 } while (exception.retry);
2325 return err;
2326}
2327
2328static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2329{
76b32999 2330 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2331 struct nfs4_accessargs args = {
2332 .fh = NFS_FH(inode),
76b32999
TM		 2333 .bitmask = server->attr_bitmask,
2334 };
2335 struct nfs4_accessres res = {
2336 .server = server,
1da177e4 2337 };
1da177e4
LT		 2338 struct rpc_message msg = {
2339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2340 .rpc_argp = &args,
2341 .rpc_resp = &res,
2342 .rpc_cred = entry->cred,
2343 };
2344 int mode = entry->mask;
2345 int status;
2346
2347 /*
2348 * Determine which access bits we want to ask for...
2349 */
2350 if (mode & MAY_READ)
2351 args.access |= NFS4_ACCESS_READ;
2352 if (S_ISDIR(inode->i_mode)) {
2353 if (mode & MAY_WRITE)
2354 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2355 if (mode & MAY_EXEC)
2356 args.access |= NFS4_ACCESS_LOOKUP;
2357 } else {
2358 if (mode & MAY_WRITE)
2359 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2360 if (mode & MAY_EXEC)
2361 args.access |= NFS4_ACCESS_EXECUTE;
2362 }
c407d41a
TM		 2363
2364 res.fattr = nfs_alloc_fattr();
2365 if (res.fattr == NULL)
2366 return -ENOMEM;
2367
cccef3b9 2368 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2369 if (!status) {
2370 entry->mask = 0;
2371 if (res.access & NFS4_ACCESS_READ)
2372 entry->mask |= MAY_READ;
2373 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2374 entry->mask |= MAY_WRITE;
2375 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2376 entry->mask |= MAY_EXEC;
c407d41a 2377 nfs_refresh_inode(inode, res.fattr);
1da177e4 2378 }
c407d41a 2379 nfs_free_fattr(res.fattr);
1da177e4
LT		 2380 return status;
2381}
2382
2383static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2384{
2385 struct nfs4_exception exception = { };
2386 int err;
2387 do {
2388 err = nfs4_handle_exception(NFS_SERVER(inode),
2389 _nfs4_proc_access(inode, entry),
2390 &exception);
2391 } while (exception.retry);
2392 return err;
2393}
2394
2395/*
2396 * TODO: For the time being, we don't try to get any attributes
2397 * along with any of the zero-copy operations READ, READDIR,
2398 * READLINK, WRITE.
2399 *
2400 * In the case of the first three, we want to put the GETATTR
2401 * after the read-type operation -- this is because it is hard
2402 * to predict the length of a GETATTR response in v4, and thus
2403 * align the READ data correctly. This means that the GETATTR
2404 * may end up partially falling into the page cache, and we should
2405 * shift it into the 'tail' of the xdr_buf before processing.
2406 * To do this efficiently, we need to know the total length
2407 * of data received, which doesn't seem to be available outside
2408 * of the RPC layer.
2409 *
2410 * In the case of WRITE, we also want to put the GETATTR after
2411 * the operation -- in this case because we want to make sure
2412 * we get the post-operation mtime and size. This means that
2413 * we can't use xdr_encode_pages() as written: we need a variant
2414 * of it which would leave room in the 'tail' iovec.
2415 *
2416 * Both of these changes to the XDR layer would in fact be quite
2417 * minor, but I decided to leave them for a subsequent patch.
2418 */
2419static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2420 unsigned int pgbase, unsigned int pglen)
2421{
2422 struct nfs4_readlink args = {
2423 .fh = NFS_FH(inode),
2424 .pgbase = pgbase,
2425 .pglen = pglen,
2426 .pages = &page,
2427 };
f50c7000 2428 struct nfs4_readlink_res res;
1da177e4
LT		 2429 struct rpc_message msg = {
2430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2431 .rpc_argp = &args,
f50c7000 2432 .rpc_resp = &res,
1da177e4
LT		 2433 };
2434
cccef3b9 2435 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2436}
2437
2438static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2439 unsigned int pgbase, unsigned int pglen)
2440{
2441 struct nfs4_exception exception = { };
2442 int err;
2443 do {
2444 err = nfs4_handle_exception(NFS_SERVER(inode),
2445 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2446 &exception);
2447 } while (exception.retry);
2448 return err;
2449}
2450
1da177e4
LT		 2451/*
2452 * Got race?
2453 * We will need to arrange for the VFS layer to provide an atomic open.
2454 * Until then, this create/open method is prone to inefficiency and race
2455 * conditions due to the lookup, create, and open VFS calls from sys_open()
2456 * placed on the wire.
2457 *
2458 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2459 * The file will be opened again in the subsequent VFS open call
2460 * (nfs4_proc_file_open).
2461 *
2462 * The open for read will just hang around to be used by any process that
2463 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2464 */
2465
2466static int
2467nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2468 int flags, struct nfs_open_context *ctx)
1da177e4 2469{
c0204fd2 2470 struct path my_path = {
ad389da7
TM		 2471 .dentry = dentry,
2472 };
c0204fd2 2473 struct path *path = &my_path;
1da177e4 2474 struct nfs4_state *state;
c0204fd2
TM		 2475 struct rpc_cred *cred = NULL;
2476 fmode_t fmode = 0;
1da177e4
LT		 2477 int status = 0;
2478
c0204fd2
TM		 2479 if (ctx != NULL) {
2480 cred = ctx->cred;
2481 path = &ctx->path;
2482 fmode = ctx->mode;
1da177e4 2483 }
c0204fd2 2484 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d4d9cdcb 2485 d_drop(dentry);
1da177e4
LT		 2486 if (IS_ERR(state)) {
2487 status = PTR_ERR(state);
c0204fd2 2488 goto out;
1da177e4 2489 }
d4d9cdcb 2490 d_add(dentry, igrab(state->inode));
d75340cc 2491 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2492 if (ctx != NULL)
2493 ctx->state = state;
02a913a7 2494 else
c0204fd2 2495 nfs4_close_sync(path, state, fmode);
1da177e4
LT		 2496out:
2497 return status;
2498}
2499
2500static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2501{
16e42959 2502 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2503 struct nfs_removeargs args = {
1da177e4 2504 .fh = NFS_FH(dir),
4fdc17b2
TM		 2505 .name.len = name->len,
2506 .name.name = name->name,
16e42959
TM		 2507 .bitmask = server->attr_bitmask,
2508 };
4fdc17b2 2509 struct nfs_removeres res = {
16e42959 2510 .server = server,
1da177e4 2511 };
1da177e4 2512 struct rpc_message msg = {
4fdc17b2
TM		 2513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2514 .rpc_argp = &args,
2515 .rpc_resp = &res,
1da177e4 2516 };
d346890b
TM		 2517 int status = -ENOMEM;
2518
2519 res.dir_attr = nfs_alloc_fattr();
2520 if (res.dir_attr == NULL)
2521 goto out;
1da177e4 2522
cccef3b9 2523 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2524 if (status == 0) {
2525 update_changeattr(dir, &res.cinfo);
d346890b 2526 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2527 }
d346890b
TM		 2528 nfs_free_fattr(res.dir_attr);
2529out:
1da177e4
LT		 2530 return status;
2531}
2532
2533static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2534{
2535 struct nfs4_exception exception = { };
2536 int err;
2537 do {
2538 err = nfs4_handle_exception(NFS_SERVER(dir),
2539 _nfs4_proc_remove(dir, name),
2540 &exception);
2541 } while (exception.retry);
2542 return err;
2543}
2544
e4eff1a6 2545static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2546{
e4eff1a6
TM		 2547 struct nfs_server *server = NFS_SERVER(dir);
2548 struct nfs_removeargs *args = msg->rpc_argp;
2549 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2550
a65318bf 2551 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2552 res->server = server;
d688e110 2553 res->seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1da177e4 2554 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2555}
2556
e4eff1a6 2557static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2558{
e4eff1a6
TM		 2559 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2560
14516c3a
TM		 2561 if (!nfs4_sequence_done(task, &res->seq_res))
2562 return 0;
9e33bed5 2563 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2564 return 0;
2565 update_changeattr(dir, &res->cinfo);
d346890b 2566 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2567 return 1;
1da177e4
LT		 2568}
2569
d3d4152a
JL		 2570static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2571{
2572 struct nfs_server *server = NFS_SERVER(dir);
2573 struct nfs_renameargs *arg = msg->rpc_argp;
2574 struct nfs_renameres *res = msg->rpc_resp;
2575
2576 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2577 arg->bitmask = server->attr_bitmask;
2578 res->server = server;
d688e110 2579 res->seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
d3d4152a
JL		 2580}
2581
2582static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2583 struct inode *new_dir)
2584{
2585 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2586
2587 if (!nfs4_sequence_done(task, &res->seq_res))
2588 return 0;
2589 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2590 return 0;
2591
2592 update_changeattr(old_dir, &res->old_cinfo);
2593 nfs_post_op_update_inode(old_dir, res->old_fattr);
2594 update_changeattr(new_dir, &res->new_cinfo);
2595 nfs_post_op_update_inode(new_dir, res->new_fattr);
2596 return 1;
2597}
2598
1da177e4
LT		 2599static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2600 struct inode *new_dir, struct qstr *new_name)
2601{
6caf2c82 2602 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2603 struct nfs_renameargs arg = {
1da177e4
LT		 2604 .old_dir = NFS_FH(old_dir),
2605 .new_dir = NFS_FH(new_dir),
2606 .old_name = old_name,
2607 .new_name = new_name,
6caf2c82
TM		 2608 .bitmask = server->attr_bitmask,
2609 };
e8582a8b 2610 struct nfs_renameres res = {
6caf2c82 2611 .server = server,
1da177e4 2612 };
1da177e4
LT		 2613 struct rpc_message msg = {
2614 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2615 .rpc_argp = &arg,
2616 .rpc_resp = &res,
2617 };
011fff72 2618 int status = -ENOMEM;
1da177e4 2619
011fff72
TM		 2620 res.old_fattr = nfs_alloc_fattr();
2621 res.new_fattr = nfs_alloc_fattr();
2622 if (res.old_fattr == NULL || res.new_fattr == NULL)
2623 goto out;
1da177e4 2624
011fff72 2625 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2626 if (!status) {
2627 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2628 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2629 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2630 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2631 }
011fff72
TM		 2632out:
2633 nfs_free_fattr(res.new_fattr);
2634 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2635 return status;
2636}
2637
2638static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2639 struct inode *new_dir, struct qstr *new_name)
2640{
2641 struct nfs4_exception exception = { };
2642 int err;
2643 do {
2644 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2645 _nfs4_proc_rename(old_dir, old_name,
2646 new_dir, new_name),
2647 &exception);
2648 } while (exception.retry);
2649 return err;
2650}
2651
2652static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2653{
91ba2eee 2654 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2655 struct nfs4_link_arg arg = {
2656 .fh = NFS_FH(inode),
2657 .dir_fh = NFS_FH(dir),
2658 .name = name,
91ba2eee
TM		 2659 .bitmask = server->attr_bitmask,
2660 };
91ba2eee
TM		 2661 struct nfs4_link_res res = {
2662 .server = server,
1da177e4 2663 };
1da177e4
LT		 2664 struct rpc_message msg = {
2665 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2666 .rpc_argp = &arg,
91ba2eee 2667 .rpc_resp = &res,
1da177e4 2668 };
136f2627
TM		 2669 int status = -ENOMEM;
2670
2671 res.fattr = nfs_alloc_fattr();
2672 res.dir_attr = nfs_alloc_fattr();
2673 if (res.fattr == NULL || res.dir_attr == NULL)
2674 goto out;
1da177e4 2675
cccef3b9 2676 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2677 if (!status) {
2678 update_changeattr(dir, &res.cinfo);
2679 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2680 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2681 }
136f2627
TM		 2682out:
2683 nfs_free_fattr(res.dir_attr);
2684 nfs_free_fattr(res.fattr);
1da177e4
LT		 2685 return status;
2686}
2687
2688static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2689{
2690 struct nfs4_exception exception = { };
2691 int err;
2692 do {
2693 err = nfs4_handle_exception(NFS_SERVER(inode),
2694 _nfs4_proc_link(inode, dir, name),
2695 &exception);
2696 } while (exception.retry);
2697 return err;
2698}
2699
57dc9a57
TM		 2700struct nfs4_createdata {
2701 struct rpc_message msg;
2702 struct nfs4_create_arg arg;
2703 struct nfs4_create_res res;
2704 struct nfs_fh fh;
2705 struct nfs_fattr fattr;
2706 struct nfs_fattr dir_fattr;
2707};
2708
2709static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2710 struct qstr *name, struct iattr *sattr, u32 ftype)
2711{
2712 struct nfs4_createdata *data;
2713
2714 data = kzalloc(sizeof(*data), GFP_KERNEL);
2715 if (data != NULL) {
2716 struct nfs_server *server = NFS_SERVER(dir);
2717
2718 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2719 data->msg.rpc_argp = &data->arg;
2720 data->msg.rpc_resp = &data->res;
2721 data->arg.dir_fh = NFS_FH(dir);
2722 data->arg.server = server;
2723 data->arg.name = name;
2724 data->arg.attrs = sattr;
2725 data->arg.ftype = ftype;
2726 data->arg.bitmask = server->attr_bitmask;
2727 data->res.server = server;
2728 data->res.fh = &data->fh;
2729 data->res.fattr = &data->fattr;
2730 data->res.dir_fattr = &data->dir_fattr;
2731 nfs_fattr_init(data->res.fattr);
2732 nfs_fattr_init(data->res.dir_fattr);
2733 }
2734 return data;
2735}
2736
2737static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2738{
cccef3b9
AA		 2739 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2740 &data->arg, &data->res, 1);
57dc9a57
TM		 2741 if (status == 0) {
2742 update_changeattr(dir, &data->res.dir_cinfo);
2743 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2744 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2745 }
2746 return status;
2747}
2748
2749static void nfs4_free_createdata(struct nfs4_createdata *data)
2750{
2751 kfree(data);
2752}
2753
4f390c15 2754static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2755 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2756{
57dc9a57
TM		 2757 struct nfs4_createdata *data;
2758 int status = -ENAMETOOLONG;
1da177e4 2759
94a6d753 2760 if (len > NFS4_MAXPATHLEN)
57dc9a57 2761 goto out;
4f390c15 2762
57dc9a57
TM		 2763 status = -ENOMEM;
2764 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2765 if (data == NULL)
2766 goto out;
2767
2768 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2769 data->arg.u.symlink.pages = &page;
2770 data->arg.u.symlink.len = len;
1da177e4 2771
57dc9a57
TM		 2772 status = nfs4_do_create(dir, dentry, data);
2773
2774 nfs4_free_createdata(data);
2775out:
1da177e4
LT		 2776 return status;
2777}
2778
4f390c15 2779static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2780 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2781{
2782 struct nfs4_exception exception = { };
2783 int err;
2784 do {
2785 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2786 _nfs4_proc_symlink(dir, dentry, page,
2787 len, sattr),
1da177e4
LT		 2788 &exception);
2789 } while (exception.retry);
2790 return err;
2791}
2792
2793static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2794 struct iattr *sattr)
2795{
57dc9a57
TM		 2796 struct nfs4_createdata *data;
2797 int status = -ENOMEM;
1da177e4 2798
57dc9a57
TM		 2799 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2800 if (data == NULL)
2801 goto out;
2802
2803 status = nfs4_do_create(dir, dentry, data);
2804
2805 nfs4_free_createdata(data);
2806out:
1da177e4
LT		 2807 return status;
2808}
2809
2810static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2811 struct iattr *sattr)
2812{
2813 struct nfs4_exception exception = { };
2814 int err;
2815 do {
2816 err = nfs4_handle_exception(NFS_SERVER(dir),
2817 _nfs4_proc_mkdir(dir, dentry, sattr),
2818 &exception);
2819 } while (exception.retry);
2820 return err;
2821}
2822
2823static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2824 u64 cookie, struct page *page, unsigned int count, int plus)
2825{
2826 struct inode *dir = dentry->d_inode;
2827 struct nfs4_readdir_arg args = {
2828 .fh = NFS_FH(dir),
2829 .pages = &page,
2830 .pgbase = 0,
2831 .count = count,
96d25e53 2832 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2833 };
2834 struct nfs4_readdir_res res;
2835 struct rpc_message msg = {
2836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2837 .rpc_argp = &args,
2838 .rpc_resp = &res,
2839 .rpc_cred = cred,
2840 };
2841 int status;
2842
3110ff80 2843 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2844 dentry->d_parent->d_name.name,
2845 dentry->d_name.name,
2846 (unsigned long long)cookie);
1da177e4
LT		 2847 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2848 res.pgbase = args.pgbase;
cccef3b9 2849 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2850 if (status == 0)
2851 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2852
2853 nfs_invalidate_atime(dir);
2854
3110ff80 2855 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2856 return status;
2857}
2858
2859static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2860 u64 cookie, struct page *page, unsigned int count, int plus)
2861{
2862 struct nfs4_exception exception = { };
2863 int err;
2864 do {
2865 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2866 _nfs4_proc_readdir(dentry, cred, cookie,
2867 page, count, plus),
2868 &exception);
2869 } while (exception.retry);
2870 return err;
2871}
2872
2873static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2874 struct iattr *sattr, dev_t rdev)
2875{
57dc9a57
TM		 2876 struct nfs4_createdata *data;
2877 int mode = sattr->ia_mode;
2878 int status = -ENOMEM;
1da177e4
LT		 2879
2880 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2881 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2882
2883 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2884 if (data == NULL)
2885 goto out;
2886
1da177e4 2887 if (S_ISFIFO(mode))
57dc9a57 2888 data->arg.ftype = NF4FIFO;
1da177e4 2889 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2890 data->arg.ftype = NF4BLK;
2891 data->arg.u.device.specdata1 = MAJOR(rdev);
2892 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2893 }
2894 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2895 data->arg.ftype = NF4CHR;
2896 data->arg.u.device.specdata1 = MAJOR(rdev);
2897 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2898 }
1da177e4 2899
57dc9a57
TM		 2900 status = nfs4_do_create(dir, dentry, data);
2901
2902 nfs4_free_createdata(data);
2903out:
1da177e4
LT		 2904 return status;
2905}
2906
2907static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2908 struct iattr *sattr, dev_t rdev)
2909{
2910 struct nfs4_exception exception = { };
2911 int err;
2912 do {
2913 err = nfs4_handle_exception(NFS_SERVER(dir),
2914 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2915 &exception);
2916 } while (exception.retry);
2917 return err;
2918}
2919
2920static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2921 struct nfs_fsstat *fsstat)
2922{
2923 struct nfs4_statfs_arg args = {
2924 .fh = fhandle,
2925 .bitmask = server->attr_bitmask,
2926 };
24ad148a
BH		 2927 struct nfs4_statfs_res res = {
2928 .fsstat = fsstat,
2929 };
1da177e4
LT		 2930 struct rpc_message msg = {
2931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2932 .rpc_argp = &args,
24ad148a 2933 .rpc_resp = &res,
1da177e4
LT		 2934 };
2935
0e574af1 2936 nfs_fattr_init(fsstat->fattr);
cccef3b9 2937 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2938}
2939
2940static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2941{
2942 struct nfs4_exception exception = { };
2943 int err;
2944 do {
2945 err = nfs4_handle_exception(server,
2946 _nfs4_proc_statfs(server, fhandle, fsstat),
2947 &exception);
2948 } while (exception.retry);
2949 return err;
2950}
2951
2952static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2953 struct nfs_fsinfo *fsinfo)
2954{
2955 struct nfs4_fsinfo_arg args = {
2956 .fh = fhandle,
2957 .bitmask = server->attr_bitmask,
2958 };
3dda5e43
BH		 2959 struct nfs4_fsinfo_res res = {
2960 .fsinfo = fsinfo,
2961 };
1da177e4
LT		 2962 struct rpc_message msg = {
2963 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2964 .rpc_argp = &args,
3dda5e43 2965 .rpc_resp = &res,
1da177e4
LT		 2966 };
2967
cccef3b9 2968 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2969}
2970
2971static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2972{
2973 struct nfs4_exception exception = { };
2974 int err;
2975
2976 do {
2977 err = nfs4_handle_exception(server,
2978 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2979 &exception);
2980 } while (exception.retry);
2981 return err;
2982}
2983
2984static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2985{
0e574af1 2986 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2987 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2988}
2989
2990static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2991 struct nfs_pathconf *pathconf)
2992{
2993 struct nfs4_pathconf_arg args = {
2994 .fh = fhandle,
2995 .bitmask = server->attr_bitmask,
2996 };
d45b2989
BH		 2997 struct nfs4_pathconf_res res = {
2998 .pathconf = pathconf,
2999 };
1da177e4
LT		 3000 struct rpc_message msg = {
3001 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3002 .rpc_argp = &args,
d45b2989 3003 .rpc_resp = &res,
1da177e4
LT		 3004 };
3005
3006 /* None of the pathconf attributes are mandatory to implement */
3007 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3008 memset(pathconf, 0, sizeof(*pathconf));
3009 return 0;
3010 }
3011
0e574af1 3012 nfs_fattr_init(pathconf->fattr);
cccef3b9 3013 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3014}
3015
3016static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3017 struct nfs_pathconf *pathconf)
3018{
3019 struct nfs4_exception exception = { };
3020 int err;
3021
3022 do {
3023 err = nfs4_handle_exception(server,
3024 _nfs4_proc_pathconf(server, fhandle, pathconf),
3025 &exception);
3026 } while (exception.retry);
3027 return err;
3028}
3029
ec06c096 3030static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3031{
ec06c096 3032 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3033
f11c88af
AA		 3034 dprintk("--> %s\n", __func__);
3035
14516c3a
TM		 3036 if (!nfs4_sequence_done(task, &data->res.seq_res))
3037 return -EAGAIN;
f11c88af 3038
9e33bed5 3039 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3040 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3041 return -EAGAIN;
1da177e4 3042 }
8850df99
TM		 3043
3044 nfs_invalidate_atime(data->inode);
1da177e4 3045 if (task->tk_status > 0)
ec06c096
TM		 3046 renew_lease(server, data->timestamp);
3047 return 0;
1da177e4
LT		 3048}
3049
bdc7f021 3050static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3051{
1da177e4 3052 data->timestamp = jiffies;
bdc7f021 3053 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3054}
3055
788e7a89 3056static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3057{
1da177e4
LT		 3058 struct inode *inode = data->inode;
3059
14516c3a
TM		 3060 if (!nfs4_sequence_done(task, &data->res.seq_res))
3061 return -EAGAIN;
def6ed7e 3062
9e33bed5 3063 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3064 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3065 return -EAGAIN;
1da177e4 3066 }
4f9838c7 3067 if (task->tk_status >= 0) {
1da177e4 3068 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3069 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3070 }
788e7a89 3071 return 0;
1da177e4
LT		 3072}
3073
bdc7f021 3074static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3075{
bdc7f021
TM		 3076 struct nfs_server *server = NFS_SERVER(data->inode);
3077
a65318bf 3078 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3079 data->res.server = server;
1da177e4
LT		 3080 data->timestamp = jiffies;
3081
bdc7f021 3082 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3083}
3084
788e7a89 3085static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3086{
1da177e4
LT		 3087 struct inode *inode = data->inode;
3088
14516c3a
TM		 3089 if (!nfs4_sequence_done(task, &data->res.seq_res))
3090 return -EAGAIN;
3091
9e33bed5 3092 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3093 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3094 return -EAGAIN;
1da177e4 3095 }
9e08a3c5 3096 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3097 return 0;
1da177e4
LT		 3098}
3099
bdc7f021 3100static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3101{
788e7a89 3102 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3103
a65318bf 3104 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3105 data->res.server = server;
bdc7f021 3106 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3107}
3108
9bc4e3ca
CL		 3109struct nfs4_renewdata {
3110 struct nfs_client *client;
3111 unsigned long timestamp;
3112};
3113
1da177e4
LT		 3114/*
3115 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3116 * standalone procedure for queueing an asynchronous RENEW.
3117 */
9bc4e3ca 3118static void nfs4_renew_release(void *calldata)
dc96aef9 3119{
9bc4e3ca
CL		 3120 struct nfs4_renewdata *data = calldata;
3121 struct nfs_client *clp = data->client;
dc96aef9 3122
0851de06
AB		 3123 if (atomic_read(&clp->cl_count) > 1)
3124 nfs4_schedule_state_renewal(clp);
3125 nfs_put_client(clp);
9bc4e3ca 3126 kfree(data);
dc96aef9
AB		 3127}
3128
9bc4e3ca 3129static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3130{
9bc4e3ca
CL		 3131 struct nfs4_renewdata *data = calldata;
3132 struct nfs_client *clp = data->client;
3133 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3134
3135 if (task->tk_status < 0) {
95baa25c
TM		 3136 /* Unless we're shutting down, schedule state recovery! */
3137 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3138 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3139 return;
3140 }
452e9352 3141 do_renew_lease(clp, timestamp);
1da177e4
LT		 3142}
3143
963d8fe5
TM		 3144static const struct rpc_call_ops nfs4_renew_ops = {
3145 .rpc_call_done = nfs4_renew_done,
dc96aef9 3146 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3147};
3148
adfa6f98 3149int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3150{
3151 struct rpc_message msg = {
3152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3153 .rpc_argp = clp,
b4454fe1 3154 .rpc_cred = cred,
1da177e4 3155 };
9bc4e3ca 3156 struct nfs4_renewdata *data;
1da177e4 3157
0851de06
AB		 3158 if (!atomic_inc_not_zero(&clp->cl_count))
3159 return -EIO;
9bc4e3ca
CL		 3160 data = kmalloc(sizeof(*data), GFP_KERNEL);
3161 if (data == NULL)
3162 return -ENOMEM;
3163 data->client = clp;
3164 data->timestamp = jiffies;
1da177e4 3165 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3166 &nfs4_renew_ops, data);
1da177e4
LT		 3167}
3168
adfa6f98 3169int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3170{
3171 struct rpc_message msg = {
3172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3173 .rpc_argp = clp,
b4454fe1 3174 .rpc_cred = cred,
1da177e4
LT		 3175 };
3176 unsigned long now = jiffies;
3177 int status;
3178
3179 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3180 if (status < 0)
3181 return status;
452e9352 3182 do_renew_lease(clp, now);
1da177e4
LT		 3183 return 0;
3184}
3185
aa1870af
BF		 3186static inline int nfs4_server_supports_acls(struct nfs_server *server)
3187{
3188 return (server->caps & NFS_CAP_ACLS)
3189 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3190 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3191}
3192
3193/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3194 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3195 * the stack.
3196 */
3197#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3198
3199static void buf_to_pages(const void *buf, size_t buflen,
3200 struct page **pages, unsigned int *pgbase)
3201{
3202 const void *p = buf;
3203
3204 *pgbase = offset_in_page(buf);
3205 p -= *pgbase;
3206 while (p < buf + buflen) {
3207 *(pages++) = virt_to_page(p);
3208 p += PAGE_CACHE_SIZE;
3209 }
3210}
3211
e50a1c2e
BF		 3212struct nfs4_cached_acl {
3213 int cached;
3214 size_t len;
3e9d4154 3215 char data[0];
e50a1c2e
BF		 3216};
3217
3218static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3219{
3220 struct nfs_inode *nfsi = NFS_I(inode);
3221
3222 spin_lock(&inode->i_lock);
3223 kfree(nfsi->nfs4_acl);
3224 nfsi->nfs4_acl = acl;
3225 spin_unlock(&inode->i_lock);
3226}
3227
3228static void nfs4_zap_acl_attr(struct inode *inode)
3229{
3230 nfs4_set_cached_acl(inode, NULL);
3231}
3232
3233static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3234{
3235 struct nfs_inode *nfsi = NFS_I(inode);
3236 struct nfs4_cached_acl *acl;
3237 int ret = -ENOENT;
3238
3239 spin_lock(&inode->i_lock);
3240 acl = nfsi->nfs4_acl;
3241 if (acl == NULL)
3242 goto out;
3243 if (buf == NULL) /* user is just asking for length */
3244 goto out_len;
3245 if (acl->cached == 0)
3246 goto out;
3247 ret = -ERANGE; /* see getxattr(2) man page */
3248 if (acl->len > buflen)
3249 goto out;
3250 memcpy(buf, acl->data, acl->len);
3251out_len:
3252 ret = acl->len;
3253out:
3254 spin_unlock(&inode->i_lock);
3255 return ret;
3256}
3257
3258static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3259{
3260 struct nfs4_cached_acl *acl;
3261
3262 if (buf && acl_len <= PAGE_SIZE) {
3263 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3264 if (acl == NULL)
3265 goto out;
3266 acl->cached = 1;
3267 memcpy(acl->data, buf, acl_len);
3268 } else {
3269 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3270 if (acl == NULL)
3271 goto out;
3272 acl->cached = 0;
3273 }
3274 acl->len = acl_len;
3275out:
3276 nfs4_set_cached_acl(inode, acl);
3277}
3278
16b4289c 3279static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3280{
aa1870af
BF		 3281 struct page *pages[NFS4ACL_MAXPAGES];
3282 struct nfs_getaclargs args = {
3283 .fh = NFS_FH(inode),
3284 .acl_pages = pages,
3285 .acl_len = buflen,
3286 };
663c79b3
BH		 3287 struct nfs_getaclres res = {
3288 .acl_len = buflen,
3289 };
e50a1c2e 3290 void *resp_buf;
aa1870af
BF		 3291 struct rpc_message msg = {
3292 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3293 .rpc_argp = &args,
663c79b3 3294 .rpc_resp = &res,
aa1870af 3295 };
e50a1c2e 3296 struct page *localpage = NULL;
aa1870af
BF		 3297 int ret;
3298
e50a1c2e
BF		 3299 if (buflen < PAGE_SIZE) {
3300 /* As long as we're doing a round trip to the server anyway,
3301 * let's be prepared for a page of acl data. */
3302 localpage = alloc_page(GFP_KERNEL);
3303 resp_buf = page_address(localpage);
3304 if (localpage == NULL)
3305 return -ENOMEM;
3306 args.acl_pages[0] = localpage;
3307 args.acl_pgbase = 0;
663c79b3 3308 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3309 } else {
3310 resp_buf = buf;
3311 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3312 }
cccef3b9 3313 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3314 if (ret)
3315 goto out_free;
663c79b3
BH		 3316 if (res.acl_len > args.acl_len)
3317 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3318 else
663c79b3 3319 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3320 if (buf) {
3321 ret = -ERANGE;
663c79b3 3322 if (res.acl_len > buflen)
e50a1c2e
BF		 3323 goto out_free;
3324 if (localpage)
663c79b3 3325 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3326 }
663c79b3 3327 ret = res.acl_len;
e50a1c2e
BF		 3328out_free:
3329 if (localpage)
3330 __free_page(localpage);
aa1870af
BF		 3331 return ret;
3332}
3333
16b4289c
TM		 3334static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3335{
3336 struct nfs4_exception exception = { };
3337 ssize_t ret;
3338 do {
3339 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3340 if (ret >= 0)
3341 break;
3342 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3343 } while (exception.retry);
3344 return ret;
3345}
3346
e50a1c2e
BF		 3347static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3348{
3349 struct nfs_server *server = NFS_SERVER(inode);
3350 int ret;
3351
3352 if (!nfs4_server_supports_acls(server))
3353 return -EOPNOTSUPP;
3354 ret = nfs_revalidate_inode(server, inode);
3355 if (ret < 0)
3356 return ret;
3357 ret = nfs4_read_cached_acl(inode, buf, buflen);
3358 if (ret != -ENOENT)
3359 return ret;
3360 return nfs4_get_acl_uncached(inode, buf, buflen);
3361}
3362
16b4289c 3363static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3364{
3365 struct nfs_server *server = NFS_SERVER(inode);
3366 struct page *pages[NFS4ACL_MAXPAGES];
3367 struct nfs_setaclargs arg = {
3368 .fh = NFS_FH(inode),
3369 .acl_pages = pages,
3370 .acl_len = buflen,
3371 };
73c403a9 3372 struct nfs_setaclres res;
4b580ee3
BF		 3373 struct rpc_message msg = {
3374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3375 .rpc_argp = &arg,
73c403a9 3376 .rpc_resp = &res,
4b580ee3
BF		 3377 };
3378 int ret;
3379
3380 if (!nfs4_server_supports_acls(server))
3381 return -EOPNOTSUPP;
642ac549 3382 nfs_inode_return_delegation(inode);
4b580ee3 3383 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3384 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3385 nfs_access_zap_cache(inode);
3386 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3387 return ret;
3388}
3389
16b4289c
TM		 3390static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3391{
3392 struct nfs4_exception exception = { };
3393 int err;
3394 do {
3395 err = nfs4_handle_exception(NFS_SERVER(inode),
3396 __nfs4_proc_set_acl(inode, buf, buflen),
3397 &exception);
3398 } while (exception.retry);
3399 return err;
3400}
3401
1da177e4 3402static int
aa5190d0 3403nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3404{
aa5190d0
TM		 3405 struct nfs_client *clp = server->nfs_client;
3406
3407 if (task->tk_status >= 0)
1da177e4
LT		 3408 return 0;
3409 switch(task->tk_status) {
9e33bed5
TM		 3410 case -NFS4ERR_ADMIN_REVOKED:
3411 case -NFS4ERR_BAD_STATEID:
3412 case -NFS4ERR_OPENMODE:
3413 if (state == NULL)
3414 break;
3415 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3416 goto do_state_recovery;
1da177e4 3417 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3418 if (state == NULL)
3419 break;
3420 nfs4_state_mark_reclaim_reboot(clp, state);
3421 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3422 case -NFS4ERR_EXPIRED:
a2c0b9e2 3423 goto do_state_recovery;
4745e315
AA		 3424#if defined(CONFIG_NFS_V4_1)
3425 case -NFS4ERR_BADSESSION:
3426 case -NFS4ERR_BADSLOT:
3427 case -NFS4ERR_BAD_HIGH_SLOT:
3428 case -NFS4ERR_DEADSESSION:
3429 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3430 case -NFS4ERR_SEQ_FALSE_RETRY:
3431 case -NFS4ERR_SEQ_MISORDERED:
3432 dprintk("%s ERROR %d, Reset session\n", __func__,
3433 task->tk_status);
0b9e2d41 3434 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3435 task->tk_status = 0;
3436 return -EAGAIN;
3437#endif /* CONFIG_NFS_V4_1 */
1da177e4 3438 case -NFS4ERR_DELAY:
aa5190d0 3439 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3440 case -NFS4ERR_GRACE:
2c643488 3441 case -EKEYEXPIRED:
1da177e4
LT		 3442 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3443 task->tk_status = 0;
3444 return -EAGAIN;
3445 case -NFS4ERR_OLD_STATEID:
3446 task->tk_status = 0;
3447 return -EAGAIN;
3448 }
3449 task->tk_status = nfs4_map_errors(task->tk_status);
3450 return 0;
a2c0b9e2
TM		 3451do_state_recovery:
3452 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3453 nfs4_schedule_state_recovery(clp);
3454 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3455 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3456 task->tk_status = 0;
3457 return -EAGAIN;
1da177e4
LT		 3458}
3459
bb8b27e5
TM		 3460int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3461 unsigned short port, struct rpc_cred *cred,
3462 struct nfs4_setclientid_res *res)
1da177e4
LT		 3463{
3464 nfs4_verifier sc_verifier;
3465 struct nfs4_setclientid setclientid = {
3466 .sc_verifier = &sc_verifier,
3467 .sc_prog = program,
3468 };
3469 struct rpc_message msg = {
3470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3471 .rpc_argp = &setclientid,
bb8b27e5 3472 .rpc_resp = res,
286d7d6a 3473 .rpc_cred = cred,
1da177e4 3474 };
bc4785cd 3475 __be32 *p;
1da177e4
LT		 3476 int loop = 0;
3477 int status;
3478
bc4785cd 3479 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3480 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3481 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3482
3483 for(;;) {
3484 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3485 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3486 clp->cl_ipaddr,
3487 rpc_peeraddr2str(clp->cl_rpcclient,
3488 RPC_DISPLAY_ADDR),
69dd716c
TM		 3489 rpc_peeraddr2str(clp->cl_rpcclient,
3490 RPC_DISPLAY_PROTO),
78ea323b 3491 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3492 clp->cl_id_uniquifier);
3493 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3494 sizeof(setclientid.sc_netid),
3495 rpc_peeraddr2str(clp->cl_rpcclient,
3496 RPC_DISPLAY_NETID));
1da177e4 3497 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3498 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3499 clp->cl_ipaddr, port >> 8, port & 255);
3500
3501 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3502 if (status != -NFS4ERR_CLID_INUSE)
3503 break;
3504 if (signalled())
3505 break;
3506 if (loop++ & 1)
3507 ssleep(clp->cl_lease_time + 1);
3508 else
3509 if (++clp->cl_id_uniquifier == 0)
3510 break;
3511 }
3512 return status;
3513}
3514
bb8b27e5
TM		 3515static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3516 struct nfs4_setclientid_res *arg,
3517 struct rpc_cred *cred)
1da177e4
LT		 3518{
3519 struct nfs_fsinfo fsinfo;
3520 struct rpc_message msg = {
3521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3522 .rpc_argp = arg,
1da177e4 3523 .rpc_resp = &fsinfo,
286d7d6a 3524 .rpc_cred = cred,
1da177e4
LT		 3525 };
3526 unsigned long now;
3527 int status;
3528
3529 now = jiffies;
3530 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3531 if (status == 0) {
3532 spin_lock(&clp->cl_lock);
3533 clp->cl_lease_time = fsinfo.lease_time * HZ;
3534 clp->cl_last_renewal = now;
3535 spin_unlock(&clp->cl_lock);
3536 }
3537 return status;
3538}
3539
bb8b27e5
TM		 3540int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3541 struct nfs4_setclientid_res *arg,
3542 struct rpc_cred *cred)
51581f3b 3543{
77e03677 3544 long timeout = 0;
51581f3b
TM		 3545 int err;
3546 do {
bb8b27e5 3547 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3548 switch (err) {
3549 case 0:
3550 return err;
3551 case -NFS4ERR_RESOURCE:
3552 /* The IBM lawyers misread another document! */
3553 case -NFS4ERR_DELAY:
2c643488 3554 case -EKEYEXPIRED:
51581f3b
TM		 3555 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3556 }
3557 } while (err == 0);
3558 return err;
3559}
3560
fe650407
TM		 3561struct nfs4_delegreturndata {
3562 struct nfs4_delegreturnargs args;
fa178f29 3563 struct nfs4_delegreturnres res;
fe650407
TM		 3564 struct nfs_fh fh;
3565 nfs4_stateid stateid;
26e976a8 3566 unsigned long timestamp;
fa178f29 3567 struct nfs_fattr fattr;
fe650407
TM		 3568 int rpc_status;
3569};
3570
fe650407
TM		 3571static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3572{
3573 struct nfs4_delegreturndata *data = calldata;
938e1010 3574
14516c3a
TM		 3575 if (!nfs4_sequence_done(task, &data->res.seq_res))
3576 return;
938e1010 3577
79708861
RL		 3578 switch (task->tk_status) {
3579 case -NFS4ERR_STALE_STATEID:
3580 case -NFS4ERR_EXPIRED:
3581 case 0:
fa178f29 3582 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3583 break;
3584 default:
3585 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3586 -EAGAIN) {
3587 nfs_restart_rpc(task, data->res.server->nfs_client);
3588 return;
3589 }
3590 }
3591 data->rpc_status = task->tk_status;
fe650407
TM		 3592}
3593
3594static void nfs4_delegreturn_release(void *calldata)
3595{
fe650407
TM		 3596 kfree(calldata);
3597}
3598
938e1010
AA		 3599#if defined(CONFIG_NFS_V4_1)
3600static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3601{
3602 struct nfs4_delegreturndata *d_data;
3603
3604 d_data = (struct nfs4_delegreturndata *)data;
3605
035168ab 3606 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3607 &d_data->args.seq_args,
3608 &d_data->res.seq_res, 1, task))
3609 return;
3610 rpc_call_start(task);
3611}
3612#endif /* CONFIG_NFS_V4_1 */
3613
c8d149f3 3614static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3615#if defined(CONFIG_NFS_V4_1)
3616 .rpc_call_prepare = nfs4_delegreturn_prepare,
3617#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3618 .rpc_call_done = nfs4_delegreturn_done,
3619 .rpc_release = nfs4_delegreturn_release,
3620};
3621
e6f81075 3622static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3623{
3624 struct nfs4_delegreturndata *data;
fa178f29 3625 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3626 struct rpc_task *task;
5138fde0
TM		 3627 struct rpc_message msg = {
3628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3629 .rpc_cred = cred,
3630 };
c970aa85
TM		 3631 struct rpc_task_setup task_setup_data = {
3632 .rpc_client = server->client,
5138fde0 3633 .rpc_message = &msg,
c970aa85
TM		 3634 .callback_ops = &nfs4_delegreturn_ops,
3635 .flags = RPC_TASK_ASYNC,
3636 };
e6f81075 3637 int status = 0;
fe650407 3638
8535b2be 3639 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3640 if (data == NULL)
3641 return -ENOMEM;
3642 data->args.fhandle = &data->fh;
3643 data->args.stateid = &data->stateid;
fa178f29 3644 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3645 nfs_copy_fh(&data->fh, NFS_FH(inode));
3646 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3647 data->res.fattr = &data->fattr;
3648 data->res.server = server;
5f7dbd5c 3649 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3650 nfs_fattr_init(data->res.fattr);
26e976a8 3651 data->timestamp = jiffies;
fe650407
TM		 3652 data->rpc_status = 0;
3653
c970aa85 3654 task_setup_data.callback_data = data;
5138fde0
TM		 3655 msg.rpc_argp = &data->args,
3656 msg.rpc_resp = &data->res,
c970aa85 3657 task = rpc_run_task(&task_setup_data);
7a1218a2 3658 if (IS_ERR(task))
fe650407 3659 return PTR_ERR(task);
e6f81075
TM		 3660 if (!issync)
3661 goto out;
fe650407 3662 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3663 if (status != 0)
3664 goto out;
3665 status = data->rpc_status;
3666 if (status != 0)
3667 goto out;
3668 nfs_refresh_inode(inode, &data->fattr);
3669out:
e6b3c4db 3670 rpc_put_task(task);
fe650407 3671 return status;
1da177e4
LT		 3672}
3673
e6f81075 3674int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3675{
3676 struct nfs_server *server = NFS_SERVER(inode);
3677 struct nfs4_exception exception = { };
3678 int err;
3679 do {
e6f81075 3680 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3681 switch (err) {
3682 case -NFS4ERR_STALE_STATEID:
3683 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3684 case 0:
3685 return 0;
3686 }
3687 err = nfs4_handle_exception(server, err, &exception);
3688 } while (exception.retry);
3689 return err;
3690}
3691
3692#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3693#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3694
3695/*
3696 * sleep, with exponential backoff, and retry the LOCK operation.
3697 */
3698static unsigned long
3699nfs4_set_lock_task_retry(unsigned long timeout)
3700{
150030b7 3701 schedule_timeout_killable(timeout);
1da177e4
LT		 3702 timeout <<= 1;
3703 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3704 return NFS4_LOCK_MAXTIMEOUT;
3705 return timeout;
3706}
3707
1da177e4
LT		 3708static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3709{
3710 struct inode *inode = state->inode;
3711 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3712 struct nfs_client *clp = server->nfs_client;
911d1aaf 3713 struct nfs_lockt_args arg = {
1da177e4 3714 .fh = NFS_FH(inode),
911d1aaf 3715 .fl = request,
1da177e4 3716 };
911d1aaf
TM		 3717 struct nfs_lockt_res res = {
3718 .denied = request,
1da177e4
LT		 3719 };
3720 struct rpc_message msg = {
3721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3722 .rpc_argp = &arg,
3723 .rpc_resp = &res,
3724 .rpc_cred = state->owner->so_cred,
3725 };
1da177e4
LT		 3726 struct nfs4_lock_state *lsp;
3727 int status;
3728
911d1aaf 3729 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3730 status = nfs4_set_lock_state(state, request);
3731 if (status != 0)
3732 goto out;
3733 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3734 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3735 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3736 switch (status) {
3737 case 0:
3738 request->fl_type = F_UNLCK;
3739 break;
3740 case -NFS4ERR_DENIED:
3741 status = 0;
1da177e4 3742 }
70cc6487 3743 request->fl_ops->fl_release_private(request);
8d0a8a9d 3744out:
1da177e4
LT		 3745 return status;
3746}
3747
3748static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3749{
3750 struct nfs4_exception exception = { };
3751 int err;
3752
3753 do {
3754 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3755 _nfs4_proc_getlk(state, cmd, request),
3756 &exception);
3757 } while (exception.retry);
3758 return err;
3759}
3760
3761static int do_vfs_lock(struct file *file, struct file_lock *fl)
3762{
3763 int res = 0;
3764 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3765 case FL_POSIX:
3766 res = posix_lock_file_wait(file, fl);
3767 break;
3768 case FL_FLOCK:
3769 res = flock_lock_file_wait(file, fl);
3770 break;
3771 default:
3772 BUG();
3773 }
1da177e4
LT		 3774 return res;
3775}
3776
faf5f49c 3777struct nfs4_unlockdata {
911d1aaf
TM		 3778 struct nfs_locku_args arg;
3779 struct nfs_locku_res res;
faf5f49c
TM		 3780 struct nfs4_lock_state *lsp;
3781 struct nfs_open_context *ctx;
911d1aaf
TM		 3782 struct file_lock fl;
3783 const struct nfs_server *server;
26e976a8 3784 unsigned long timestamp;
faf5f49c
TM		 3785};
3786
911d1aaf
TM		 3787static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3788 struct nfs_open_context *ctx,
3789 struct nfs4_lock_state *lsp,
3790 struct nfs_seqid *seqid)
3791{
3792 struct nfs4_unlockdata *p;
3793 struct inode *inode = lsp->ls_state->inode;
3794
8535b2be 3795 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3796 if (p == NULL)
3797 return NULL;
3798 p->arg.fh = NFS_FH(inode);
3799 p->arg.fl = &p->fl;
3800 p->arg.seqid = seqid;
c1d51931 3801 p->res.seqid = seqid;
5f7dbd5c 3802 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3803 p->arg.stateid = &lsp->ls_stateid;
3804 p->lsp = lsp;
3805 atomic_inc(&lsp->ls_count);
3806 /* Ensure we don't close file until we're done freeing locks! */
3807 p->ctx = get_nfs_open_context(ctx);
3808 memcpy(&p->fl, fl, sizeof(p->fl));
3809 p->server = NFS_SERVER(inode);
3810 return p;
3811}
3812
06f814a3 3813static void nfs4_locku_release_calldata(void *data)
faf5f49c 3814{
963d8fe5 3815 struct nfs4_unlockdata *calldata = data;
911d1aaf 3816 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3817 nfs4_put_lock_state(calldata->lsp);
3818 put_nfs_open_context(calldata->ctx);
3819 kfree(calldata);
faf5f49c
TM		 3820}
3821
963d8fe5 3822static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3823{
963d8fe5 3824 struct nfs4_unlockdata *calldata = data;
faf5f49c 3825
14516c3a
TM		 3826 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3827 return;
faf5f49c
TM		 3828 switch (task->tk_status) {
3829 case 0:
3830 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3831 calldata->res.stateid.data,
faf5f49c 3832 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3833 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3834 break;
9e33bed5
TM		 3835 case -NFS4ERR_BAD_STATEID:
3836 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3837 case -NFS4ERR_STALE_STATEID:
3838 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3839 break;
3840 default:
9e33bed5 3841 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3842 nfs_restart_rpc(task,
d61e612a 3843 calldata->server->nfs_client);
faf5f49c 3844 }
faf5f49c
TM		 3845}
3846
4ce70ada 3847static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3848{
4ce70ada 3849 struct nfs4_unlockdata *calldata = data;
faf5f49c 3850
911d1aaf 3851 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3852 return;
3853 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3854 /* Note: exit _without_ running nfs4_locku_done */
3855 task->tk_action = NULL;
faf5f49c
TM		 3856 return;
3857 }
26e976a8 3858 calldata->timestamp = jiffies;
035168ab 3859 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3860 &calldata->arg.seq_args,
3861 &calldata->res.seq_res, 1, task))
3862 return;
5138fde0 3863 rpc_call_start(task);
faf5f49c
TM		 3864}
3865
963d8fe5 3866static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3867 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3868 .rpc_call_done = nfs4_locku_done,
06f814a3 3869 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3870};
3871
a5d16a4d
TM		 3872static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3873 struct nfs_open_context *ctx,
3874 struct nfs4_lock_state *lsp,
3875 struct nfs_seqid *seqid)
3876{
3877 struct nfs4_unlockdata *data;
5138fde0
TM		 3878 struct rpc_message msg = {
3879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3880 .rpc_cred = ctx->cred,
3881 };
c970aa85
TM		 3882 struct rpc_task_setup task_setup_data = {
3883 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3884 .rpc_message = &msg,
c970aa85 3885 .callback_ops = &nfs4_locku_ops,
101070ca 3886 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3887 .flags = RPC_TASK_ASYNC,
3888 };
a5d16a4d 3889
137d6aca
FF		 3890 /* Ensure this is an unlock - when canceling a lock, the
3891 * canceled lock is passed in, and it won't be an unlock.
3892 */
3893 fl->fl_type = F_UNLCK;
3894
a5d16a4d
TM		 3895 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3896 if (data == NULL) {
3897 nfs_free_seqid(seqid);
3898 return ERR_PTR(-ENOMEM);
3899 }
3900
5138fde0
TM		 3901 msg.rpc_argp = &data->arg,
3902 msg.rpc_resp = &data->res,
c970aa85
TM		 3903 task_setup_data.callback_data = data;
3904 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3905}
3906
faf5f49c
TM		 3907static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3908{
19e03c57 3909 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3910 struct nfs_seqid *seqid;
1da177e4 3911 struct nfs4_lock_state *lsp;
06f814a3
TM		 3912 struct rpc_task *task;
3913 int status = 0;
536ff0f8 3914 unsigned char fl_flags = request->fl_flags;
faf5f49c 3915
8d0a8a9d 3916 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3917 /* Unlock _before_ we do the RPC call */
3918 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3919 down_read(&nfsi->rwsem);
3920 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3921 up_read(&nfsi->rwsem);
9b073574 3922 goto out;
19e03c57
TM		 3923 }
3924 up_read(&nfsi->rwsem);
8d0a8a9d 3925 if (status != 0)
9b073574
TM		 3926 goto out;
3927 /* Is this a delegated lock? */
3928 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3929 goto out;
8d0a8a9d 3930 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 3931 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 3932 status = -ENOMEM;
911d1aaf 3933 if (seqid == NULL)
9b073574 3934 goto out;
cd3758e3 3935 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3936 status = PTR_ERR(task);
3937 if (IS_ERR(task))
9b073574 3938 goto out;
a5d16a4d 3939 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3940 rpc_put_task(task);
9b073574 3941out:
536ff0f8 3942 request->fl_flags = fl_flags;
1da177e4
LT		 3943 return status;
3944}
3945
a5d16a4d
TM		 3946struct nfs4_lockdata {
3947 struct nfs_lock_args arg;
3948 struct nfs_lock_res res;
3949 struct nfs4_lock_state *lsp;
3950 struct nfs_open_context *ctx;
3951 struct file_lock fl;
26e976a8 3952 unsigned long timestamp;
a5d16a4d
TM		 3953 int rpc_status;
3954 int cancelled;
66179efe 3955 struct nfs_server *server;
a5d16a4d
TM		 3956};
3957
3958static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 3959 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
3960 gfp_t gfp_mask)
1da177e4 3961{
a5d16a4d
TM		 3962 struct nfs4_lockdata *p;
3963 struct inode *inode = lsp->ls_state->inode;
1da177e4 3964 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 3965
8535b2be 3966 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 3967 if (p == NULL)
3968 return NULL;
3969
3970 p->arg.fh = NFS_FH(inode);
3971 p->arg.fl = &p->fl;
8535b2be 3972 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 3973 if (p->arg.open_seqid == NULL)
3974 goto out_free;
8535b2be 3975 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 3976 if (p->arg.lock_seqid == NULL)
2f74c0a0 3977 goto out_free_seqid;
a5d16a4d 3978 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3979 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3980 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3981 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3982 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3983 p->lsp = lsp;
66179efe 3984 p->server = server;
a5d16a4d
TM		 3985 atomic_inc(&lsp->ls_count);
3986 p->ctx = get_nfs_open_context(ctx);
3987 memcpy(&p->fl, fl, sizeof(p->fl));
3988 return p;
2f74c0a0
TM		 3989out_free_seqid:
3990 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3991out_free:
3992 kfree(p);
3993 return NULL;
3994}
3995
3996static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3997{
3998 struct nfs4_lockdata *data = calldata;
3999 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4000
3110ff80 4001 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4002 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4003 return;
a5d16a4d
TM		 4004 /* Do we need to do an open_to_lock_owner? */
4005 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4006 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4007 return;
a5d16a4d
TM		 4008 data->arg.open_stateid = &state->stateid;
4009 data->arg.new_lock_owner = 1;
c1d51931 4010 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4011 } else
4012 data->arg.new_lock_owner = 0;
26e976a8 4013 data->timestamp = jiffies;
035168ab
TM		 4014 if (nfs4_setup_sequence(data->server,
4015 &data->arg.seq_args,
66179efe
AA		 4016 &data->res.seq_res, 1, task))
4017 return;
5138fde0 4018 rpc_call_start(task);
3110ff80 4019 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4020}
4021
b257957e
AB		 4022static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4023{
4024 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4025 nfs4_lock_prepare(task, calldata);
4026}
4027
a5d16a4d
TM		 4028static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4029{
4030 struct nfs4_lockdata *data = calldata;
4031
3110ff80 4032 dprintk("%s: begin!\n", __func__);
a5d16a4d 4033
14516c3a
TM		 4034 if (!nfs4_sequence_done(task, &data->res.seq_res))
4035 return;
66179efe 4036
a5d16a4d 4037 data->rpc_status = task->tk_status;
a5d16a4d 4038 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4039 if (data->rpc_status == 0)
4040 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4041 else
4042 goto out;
4043 }
4044 if (data->rpc_status == 0) {
4045 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4046 sizeof(data->lsp->ls_stateid.data));
4047 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4048 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4049 }
a5d16a4d 4050out:
3110ff80 4051 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4052}
4053
4054static void nfs4_lock_release(void *calldata)
4055{
4056 struct nfs4_lockdata *data = calldata;
4057
3110ff80 4058 dprintk("%s: begin!\n", __func__);
2f74c0a0 4059 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4060 if (data->cancelled != 0) {
4061 struct rpc_task *task;
4062 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4063 data->arg.lock_seqid);
4064 if (!IS_ERR(task))
e6b3c4db 4065 rpc_put_task(task);
3110ff80 4066 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4067 } else
4068 nfs_free_seqid(data->arg.lock_seqid);
4069 nfs4_put_lock_state(data->lsp);
4070 put_nfs_open_context(data->ctx);
4071 kfree(data);
3110ff80 4072 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4073}
4074
4075static const struct rpc_call_ops nfs4_lock_ops = {
4076 .rpc_call_prepare = nfs4_lock_prepare,
4077 .rpc_call_done = nfs4_lock_done,
4078 .rpc_release = nfs4_lock_release,
4079};
4080
b257957e
AB		 4081static const struct rpc_call_ops nfs4_recover_lock_ops = {
4082 .rpc_call_prepare = nfs4_recover_lock_prepare,
4083 .rpc_call_done = nfs4_lock_done,
4084 .rpc_release = nfs4_lock_release,
4085};
4086
2bee72a6
TM		 4087static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4088{
4089 struct nfs_client *clp = server->nfs_client;
4090 struct nfs4_state *state = lsp->ls_state;
4091
4092 switch (error) {
4093 case -NFS4ERR_ADMIN_REVOKED:
4094 case -NFS4ERR_BAD_STATEID:
4095 case -NFS4ERR_EXPIRED:
4096 if (new_lock_owner != 0 ||
4097 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4098 nfs4_state_mark_reclaim_nograce(clp, state);
4099 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4100 break;
4101 case -NFS4ERR_STALE_STATEID:
4102 if (new_lock_owner != 0 ||
4103 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4104 nfs4_state_mark_reclaim_reboot(clp, state);
4105 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4106 };
4107}
4108
afe6c27c 4109static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4110{
4111 struct nfs4_lockdata *data;
4112 struct rpc_task *task;
5138fde0
TM		 4113 struct rpc_message msg = {
4114 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4115 .rpc_cred = state->owner->so_cred,
4116 };
c970aa85
TM		 4117 struct rpc_task_setup task_setup_data = {
4118 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4119 .rpc_message = &msg,
c970aa85 4120 .callback_ops = &nfs4_lock_ops,
101070ca 4121 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4122 .flags = RPC_TASK_ASYNC,
4123 };
a5d16a4d
TM		 4124 int ret;
4125
3110ff80 4126 dprintk("%s: begin!\n", __func__);
cd3758e3 4127 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4128 fl->fl_u.nfs4_fl.owner,
4129 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4130 if (data == NULL)
4131 return -ENOMEM;
4132 if (IS_SETLKW(cmd))
4133 data->arg.block = 1;
b257957e
AB		 4134 if (recovery_type > NFS_LOCK_NEW) {
4135 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4136 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4137 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4138 }
5138fde0
TM		 4139 msg.rpc_argp = &data->arg,
4140 msg.rpc_resp = &data->res,
c970aa85
TM		 4141 task_setup_data.callback_data = data;
4142 task = rpc_run_task(&task_setup_data);
7a1218a2 4143 if (IS_ERR(task))
a5d16a4d 4144 return PTR_ERR(task);
a5d16a4d
TM		 4145 ret = nfs4_wait_for_completion_rpc_task(task);
4146 if (ret == 0) {
4147 ret = data->rpc_status;
2bee72a6
TM		 4148 if (ret)
4149 nfs4_handle_setlk_error(data->server, data->lsp,
4150 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4151 } else
4152 data->cancelled = 1;
e6b3c4db 4153 rpc_put_task(task);
3110ff80 4154 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4155 return ret;
1da177e4
LT		 4156}
4157
4158static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4159{
202b50dc
TM		 4160 struct nfs_server *server = NFS_SERVER(state->inode);
4161 struct nfs4_exception exception = { };
4162 int err;
4163
4164 do {
42a2d13e
TM		 4165 /* Cache the lock if possible... */
4166 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4167 return 0;
afe6c27c 4168 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4169 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4170 break;
4171 nfs4_handle_exception(server, err, &exception);
4172 } while (exception.retry);
4173 return err;
1da177e4
LT		 4174}
4175
4176static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4177{
202b50dc
TM		 4178 struct nfs_server *server = NFS_SERVER(state->inode);
4179 struct nfs4_exception exception = { };
4180 int err;
4181
6bfc93ef
TM		 4182 err = nfs4_set_lock_state(state, request);
4183 if (err != 0)
4184 return err;
202b50dc 4185 do {
42a2d13e
TM		 4186 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4187 return 0;
afe6c27c 4188 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4189 switch (err) {
4190 default:
4191 goto out;
4192 case -NFS4ERR_GRACE:
4193 case -NFS4ERR_DELAY:
2c643488 4194 case -EKEYEXPIRED:
a9ed2e25
TM		 4195 nfs4_handle_exception(server, err, &exception);
4196 err = 0;
4197 }
202b50dc 4198 } while (exception.retry);
a9ed2e25 4199out:
202b50dc 4200 return err;
1da177e4
LT		 4201}
4202
4203static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4204{
19e03c57 4205 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4206 unsigned char fl_flags = request->fl_flags;
8e469ebd 4207 int status = -ENOLCK;
1da177e4 4208
8e469ebd
TM		 4209 if ((fl_flags & FL_POSIX) &&
4210 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4211 goto out;
6bfc93ef 4212 /* Is this a delegated open? */
6bfc93ef
TM		 4213 status = nfs4_set_lock_state(state, request);
4214 if (status != 0)
4215 goto out;
01c3b861
TM		 4216 request->fl_flags |= FL_ACCESS;
4217 status = do_vfs_lock(request->fl_file, request);
4218 if (status < 0)
4219 goto out;
19e03c57 4220 down_read(&nfsi->rwsem);
01c3b861 4221 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4222 /* Yes: cache locks! */
01c3b861 4223 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4224 request->fl_flags = fl_flags & ~FL_SLEEP;
4225 status = do_vfs_lock(request->fl_file, request);
4226 goto out_unlock;
01c3b861 4227 }
afe6c27c 4228 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4229 if (status != 0)
01c3b861 4230 goto out_unlock;
6bfc93ef 4231 /* Note: we always want to sleep here! */
01c3b861 4232 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4233 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4234 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4235out_unlock:
19e03c57 4236 up_read(&nfsi->rwsem);
01c3b861
TM		 4237out:
4238 request->fl_flags = fl_flags;
1da177e4
LT		 4239 return status;
4240}
4241
4242static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4243{
4244 struct nfs4_exception exception = { };
4245 int err;
4246
4247 do {
965b5d67
TM		 4248 err = _nfs4_proc_setlk(state, cmd, request);
4249 if (err == -NFS4ERR_DENIED)
4250 err = -EAGAIN;
1da177e4 4251 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4252 err, &exception);
1da177e4
LT		 4253 } while (exception.retry);
4254 return err;
4255}
4256
4257static int
4258nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4259{
4260 struct nfs_open_context *ctx;
4261 struct nfs4_state *state;
4262 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4263 int status;
4264
4265 /* verify open state */
cd3758e3 4266 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4267 state = ctx->state;
4268
4269 if (request->fl_start < 0 || request->fl_end < 0)
4270 return -EINVAL;
4271
d953126a
TM		 4272 if (IS_GETLK(cmd)) {
4273 if (state != NULL)
4274 return nfs4_proc_getlk(state, F_GETLK, request);
4275 return 0;
4276 }
1da177e4
LT		 4277
4278 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4279 return -EINVAL;
4280
d953126a
TM		 4281 if (request->fl_type == F_UNLCK) {
4282 if (state != NULL)
4283 return nfs4_proc_unlck(state, cmd, request);
4284 return 0;
4285 }
1da177e4 4286
d953126a
TM		 4287 if (state == NULL)
4288 return -ENOLCK;
1da177e4
LT		 4289 do {
4290 status = nfs4_proc_setlk(state, cmd, request);
4291 if ((status != -EAGAIN) || IS_SETLK(cmd))
4292 break;
4293 timeout = nfs4_set_lock_task_retry(timeout);
4294 status = -ERESTARTSYS;
4295 if (signalled())
4296 break;
4297 } while(status < 0);
1da177e4
LT		 4298 return status;
4299}
4300
888e694c
TM		 4301int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4302{
4303 struct nfs_server *server = NFS_SERVER(state->inode);
4304 struct nfs4_exception exception = { };
4305 int err;
4306
4307 err = nfs4_set_lock_state(state, fl);
4308 if (err != 0)
4309 goto out;
4310 do {
afe6c27c 4311 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4312 switch (err) {
4313 default:
4314 printk(KERN_ERR "%s: unhandled error %d.\n",
4315 __func__, err);
4316 case 0:
965b5d67 4317 case -ESTALE:
d5122201
TM		 4318 goto out;
4319 case -NFS4ERR_EXPIRED:
4320 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4321 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4322 case -NFS4ERR_BADSESSION:
4323 case -NFS4ERR_BADSLOT:
4324 case -NFS4ERR_BAD_HIGH_SLOT:
4325 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4326 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4327 nfs4_schedule_state_recovery(server->nfs_client);
4328 goto out;
965b5d67
TM		 4329 case -ERESTARTSYS:
4330 /*
4331 * The show must go on: exit, but mark the
4332 * stateid as needing recovery.
4333 */
4334 case -NFS4ERR_ADMIN_REVOKED:
4335 case -NFS4ERR_BAD_STATEID:
4336 case -NFS4ERR_OPENMODE:
4337 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4338 err = 0;
4339 goto out;
4340 case -ENOMEM:
4341 case -NFS4ERR_DENIED:
4342 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4343 err = 0;
4344 goto out;
d5122201 4345 case -NFS4ERR_DELAY:
2c643488 4346 case -EKEYEXPIRED:
d5122201
TM		 4347 break;
4348 }
888e694c
TM		 4349 err = nfs4_handle_exception(server, err, &exception);
4350 } while (exception.retry);
4351out:
4352 return err;
4353}
6b3b5496 4354
d3c7b7cc
TM		 4355static void nfs4_release_lockowner_release(void *calldata)
4356{
4357 kfree(calldata);
4358}
4359
4360const struct rpc_call_ops nfs4_release_lockowner_ops = {
4361 .rpc_release = nfs4_release_lockowner_release,
4362};
4363
4364void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4365{
4366 struct nfs_server *server = lsp->ls_state->owner->so_server;
4367 struct nfs_release_lockowner_args *args;
4368 struct rpc_message msg = {
4369 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4370 };
4371
4372 if (server->nfs_client->cl_mvops->minor_version != 0)
4373 return;
4374 args = kmalloc(sizeof(*args), GFP_NOFS);
4375 if (!args)
4376 return;
4377 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4378 args->lock_owner.id = lsp->ls_id.id;
4379 msg.rpc_argp = args;
4380 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4381}
4382
aa1870af
BF		 4383#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4384
6b3b5496
BF		 4385int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4386 size_t buflen, int flags)
4387{
4b580ee3
BF		 4388 struct inode *inode = dentry->d_inode;
4389
4390 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4391 return -EOPNOTSUPP;
4392
4b580ee3 4393 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4394}
4395
4396/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4397 * and that's what we'll do for e.g. user attributes that haven't been set.
4398 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4399 * attributes in kernel-managed attribute namespaces. */
4400ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4401 size_t buflen)
4402{
aa1870af
BF		 4403 struct inode *inode = dentry->d_inode;
4404
4405 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4406 return -EOPNOTSUPP;
4407
4408 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4409}
4410
4411ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4412{
aa1870af 4413 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4414
096455a2
BF		 4415 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4416 return 0;
6b3b5496
BF		 4417 if (buf && buflen < len)
4418 return -ERANGE;
4419 if (buf)
aa1870af
BF		 4420 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4421 return len;
6b3b5496
BF		 4422}
4423
69aaaae1
TM		 4424static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4425{
4426 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4427 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4428 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4429 return;
4430
4431 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4432 NFS_ATTR_FATTR_NLINK;
4433 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4434 fattr->nlink = 2;
4435}
4436
56659e99 4437int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4438 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4439{
4440 struct nfs_server *server = NFS_SERVER(dir);
4441 u32 bitmask[2] = {
361e624f
MN		 4442 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4443 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4444 };
4445 struct nfs4_fs_locations_arg args = {
4446 .dir_fh = NFS_FH(dir),
c228fd3a 4447 .name = name,
683b57b4
TM		 4448 .page = page,
4449 .bitmask = bitmask,
4450 };
22958463
BH		 4451 struct nfs4_fs_locations_res res = {
4452 .fs_locations = fs_locations,
4453 };
683b57b4
TM		 4454 struct rpc_message msg = {
4455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4456 .rpc_argp = &args,
22958463 4457 .rpc_resp = &res,
683b57b4
TM		 4458 };
4459 int status;
4460
3110ff80 4461 dprintk("%s: start\n", __func__);
c228fd3a 4462 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4463 fs_locations->server = server;
830b8e33 4464 fs_locations->nlocations = 0;
cccef3b9 4465 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4466 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4467 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4468 return status;
4469}
4470
557134a3 4471#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4472/*
4473 * nfs4_proc_exchange_id()
4474 *
4475 * Since the clientid has expired, all compounds using sessions
4476 * associated with the stale clientid will be returning
4477 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4478 * be in some phase of session reset.
4479 */
4d643d1d 4480int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4481{
4482 nfs4_verifier verifier;
4483 struct nfs41_exchange_id_args args = {
4484 .client = clp,
4485 .flags = clp->cl_exchange_flags,
4486 };
4487 struct nfs41_exchange_id_res res = {
4488 .client = clp,
4489 };
4490 int status;
4491 struct rpc_message msg = {
4492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4493 .rpc_argp = &args,
4494 .rpc_resp = &res,
4495 .rpc_cred = cred,
4496 };
4497 __be32 *p;
4498
4499 dprintk("--> %s\n", __func__);
4500 BUG_ON(clp == NULL);
a7b72103 4501
7b183d0d
AB		 4502 /* Remove server-only flags */
4503 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4504
99fe60d0
BH		 4505 p = (u32 *)verifier.data;
4506 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4507 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4508 args.verifier = &verifier;
4509
4510 while (1) {
4511 args.id_len = scnprintf(args.id, sizeof(args.id),
4512 "%s/%s %u",
4513 clp->cl_ipaddr,
4514 rpc_peeraddr2str(clp->cl_rpcclient,
4515 RPC_DISPLAY_ADDR),
4516 clp->cl_id_uniquifier);
4517
4518 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4519
180b62a3 4520 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4521 break;
4522
4523 if (signalled())
4524 break;
4525
4526 if (++clp->cl_id_uniquifier == 0)
4527 break;
4528 }
4529
4530 dprintk("<-- %s status= %d\n", __func__, status);
4531 return status;
4532}
4533
2050f0cc
AA		 4534struct nfs4_get_lease_time_data {
4535 struct nfs4_get_lease_time_args *args;
4536 struct nfs4_get_lease_time_res *res;
4537 struct nfs_client *clp;
4538};
4539
4540static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4541 void *calldata)
4542{
4543 int ret;
4544 struct nfs4_get_lease_time_data *data =
4545 (struct nfs4_get_lease_time_data *)calldata;
4546
4547 dprintk("--> %s\n", __func__);
689cf5c1 4548 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4549 /* just setup sequence, do not trigger session recovery
4550 since we're invoked within one */
4551 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4552 &data->args->la_seq_args,
4553 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4554
4555 BUG_ON(ret == -EAGAIN);
4556 rpc_call_start(task);
4557 dprintk("<-- %s\n", __func__);
4558}
4559
4560/*
4561 * Called from nfs4_state_manager thread for session setup, so don't recover
4562 * from sequence operation or clientid errors.
4563 */
4564static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4565{
4566 struct nfs4_get_lease_time_data *data =
4567 (struct nfs4_get_lease_time_data *)calldata;
4568
4569 dprintk("--> %s\n", __func__);
14516c3a
TM		 4570 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4571 return;
2050f0cc
AA		 4572 switch (task->tk_status) {
4573 case -NFS4ERR_DELAY:
4574 case -NFS4ERR_GRACE:
2c643488 4575 case -EKEYEXPIRED:
2050f0cc
AA		 4576 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4577 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4578 task->tk_status = 0;
0110ee15 4579 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4580 return;
4581 }
2050f0cc
AA		 4582 dprintk("<-- %s\n", __func__);
4583}
4584
4585struct rpc_call_ops nfs4_get_lease_time_ops = {
4586 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4587 .rpc_call_done = nfs4_get_lease_time_done,
4588};
4589
4590int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4591{
4592 struct rpc_task *task;
4593 struct nfs4_get_lease_time_args args;
4594 struct nfs4_get_lease_time_res res = {
4595 .lr_fsinfo = fsinfo,
4596 };
4597 struct nfs4_get_lease_time_data data = {
4598 .args = &args,
4599 .res = &res,
4600 .clp = clp,
4601 };
4602 struct rpc_message msg = {
4603 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4604 .rpc_argp = &args,
4605 .rpc_resp = &res,
4606 };
4607 struct rpc_task_setup task_setup = {
4608 .rpc_client = clp->cl_rpcclient,
4609 .rpc_message = &msg,
4610 .callback_ops = &nfs4_get_lease_time_ops,
4611 .callback_data = &data
4612 };
4613 int status;
4614
4615 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4616 dprintk("--> %s\n", __func__);
4617 task = rpc_run_task(&task_setup);
4618
4619 if (IS_ERR(task))
4620 status = PTR_ERR(task);
4621 else {
4622 status = task->tk_status;
4623 rpc_put_task(task);
4624 }
4625 dprintk("<-- %s return %d\n", __func__, status);
4626
4627 return status;
4628}
4629
b73dafa7
RL		 4630/*
4631 * Reset a slot table
4632 */
104aeba4
AA		 4633static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4634 int ivalue)
ac72b7b3 4635{
104aeba4 4636 struct nfs4_slot *new = NULL;
b73dafa7 4637 int i;
ac72b7b3
AA		 4638 int ret = 0;
4639
104aeba4
AA		 4640 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4641 max_reqs, tbl->max_slots);
ac72b7b3 4642
104aeba4
AA		 4643 /* Does the newly negotiated max_reqs match the existing slot table? */
4644 if (max_reqs != tbl->max_slots) {
4645 ret = -ENOMEM;
4646 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4647 GFP_NOFS);
104aeba4
AA		 4648 if (!new)
4649 goto out;
4650 ret = 0;
4651 kfree(tbl->slots);
ac72b7b3
AA		 4652 }
4653 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4654 if (new) {
4655 tbl->slots = new;
4656 tbl->max_slots = max_reqs;
4657 }
4658 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4659 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4660 spin_unlock(&tbl->slot_tbl_lock);
4661 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4662 tbl, tbl->slots, tbl->max_slots);
4663out:
4664 dprintk("<-- %s: return %d\n", __func__, ret);
4665 return ret;
4666}
4667
b73dafa7
RL		 4668/*
4669 * Reset the forechannel and backchannel slot tables
4670 */
4671static int nfs4_reset_slot_tables(struct nfs4_session *session)
4672{
4673 int status;
4674
4675 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4676 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4677 if (status)
4678 return status;
4679
4680 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4681 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4682 return status;
4683}
4684
f8625a6a
RL		 4685/* Destroy the slot table */
4686static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4687{
4688 if (session->fc_slot_table.slots != NULL) {
4689 kfree(session->fc_slot_table.slots);
4690 session->fc_slot_table.slots = NULL;
4691 }
4692 if (session->bc_slot_table.slots != NULL) {
4693 kfree(session->bc_slot_table.slots);
4694 session->bc_slot_table.slots = NULL;
4695 }
4696 return;
4697}
4698
fc931582
AA		 4699/*
4700 * Initialize slot table
4701 */
050047ce
RL		 4702static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4703 int max_slots, int ivalue)
fc931582 4704{
fc931582
AA		 4705 struct nfs4_slot *slot;
4706 int ret = -ENOMEM;
4707
4708 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4709
050047ce 4710 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4711
8535b2be 4712 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4713 if (!slot)
4714 goto out;
fc931582
AA		 4715 ret = 0;
4716
4717 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4718 tbl->max_slots = max_slots;
4719 tbl->slots = slot;
4720 tbl->highest_used_slotid = -1; /* no slot is currently used */
4721 spin_unlock(&tbl->slot_tbl_lock);
4722 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4723 tbl, tbl->slots, tbl->max_slots);
4724out:
4725 dprintk("<-- %s: return %d\n", __func__, ret);
4726 return ret;
fc931582
AA		 4727}
4728
050047ce
RL		 4729/*
4730 * Initialize the forechannel and backchannel tables
4731 */
4732static int nfs4_init_slot_tables(struct nfs4_session *session)
4733{
f26468fb
TM		 4734 struct nfs4_slot_table *tbl;
4735 int status = 0;
050047ce 4736
f26468fb
TM		 4737 tbl = &session->fc_slot_table;
4738 if (tbl->slots == NULL) {
4739 status = nfs4_init_slot_table(tbl,
4740 session->fc_attrs.max_reqs, 1);
4741 if (status)
4742 return status;
4743 }
050047ce 4744
f26468fb
TM		 4745 tbl = &session->bc_slot_table;
4746 if (tbl->slots == NULL) {
4747 status = nfs4_init_slot_table(tbl,
4748 session->bc_attrs.max_reqs, 0);
4749 if (status)
4750 nfs4_destroy_slot_tables(session);
4751 }
f8625a6a
RL		 4752
4753 return status;
557134a3
AA		 4754}
4755
4756struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4757{
4758 struct nfs4_session *session;
4759 struct nfs4_slot_table *tbl;
4760
8535b2be 4761 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4762 if (!session)
4763 return NULL;
76db6d95 4764
ea028ac9 4765 init_completion(&session->complete);
76db6d95 4766
557134a3 4767 tbl = &session->fc_slot_table;
9dfdf404 4768 tbl->highest_used_slotid = -1;
557134a3 4769 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4770 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4771
4772 tbl = &session->bc_slot_table;
9dfdf404 4773 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4774 spin_lock_init(&tbl->slot_tbl_lock);
4775 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4776
1055d76d
TM		 4777 session->session_state = 1<<NFS4_SESSION_INITING;
4778
557134a3
AA		 4779 session->clp = clp;
4780 return session;
4781}
4782
4783void nfs4_destroy_session(struct nfs4_session *session)
4784{
5a0ffe54
AA		 4785 nfs4_proc_destroy_session(session);
4786 dprintk("%s Destroy backchannel for xprt %p\n",
4787 __func__, session->clp->cl_rpcclient->cl_xprt);
4788 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4789 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4790 nfs4_destroy_slot_tables(session);
557134a3
AA		 4791 kfree(session);
4792}
4793
fc931582
AA		 4794/*
4795 * Initialize the values to be used by the client in CREATE_SESSION
4796 * If nfs4_init_session set the fore channel request and response sizes,
4797 * use them.
4798 *
4799 * Set the back channel max_resp_sz_cached to zero to force the client to
4800 * always set csa_cachethis to FALSE because the current implementation
4801 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4802 */
4803static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4804{
4805 struct nfs4_session *session = args->client->cl_session;
4806 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4807 mxresp_sz = session->fc_attrs.max_resp_sz;
4808
4809 if (mxrqst_sz == 0)
4810 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4811 if (mxresp_sz == 0)
4812 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4813 /* Fore channel attributes */
4814 args->fc_attrs.headerpadsz = 0;
4815 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4816 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4817 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4818 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4819
4820 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4821 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4822 __func__,
4823 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4824 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4825
4826 /* Back channel attributes */
4827 args->bc_attrs.headerpadsz = 0;
4828 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4829 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4830 args->bc_attrs.max_resp_sz_cached = 0;
4831 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4832 args->bc_attrs.max_reqs = 1;
4833
4834 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4835 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4836 __func__,
4837 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4838 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4839 args->bc_attrs.max_reqs);
4840}
4841
8d35301d
AA		 4842static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4843{
4844 if (rcvd <= sent)
4845 return 0;
4846 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4847 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4848 return -EINVAL;
4849}
4850
4851#define _verify_fore_channel_attr(_name_) \
4852 _verify_channel_attr("fore", #_name_, \
4853 args->fc_attrs._name_, \
4854 session->fc_attrs._name_)
4855
4856#define _verify_back_channel_attr(_name_) \
4857 _verify_channel_attr("back", #_name_, \
4858 args->bc_attrs._name_, \
4859 session->bc_attrs._name_)
4860
4861/*
4862 * The server is not allowed to increase the fore channel header pad size,
4863 * maximum response size, or maximum number of operations.
4864 *
4865 * The back channel attributes are only negotiatied down: We send what the
4866 * (back channel) server insists upon.
4867 */
4868static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4869 struct nfs4_session *session)
4870{
4871 int ret = 0;
4872
4873 ret |= _verify_fore_channel_attr(headerpadsz);
4874 ret |= _verify_fore_channel_attr(max_resp_sz);
4875 ret |= _verify_fore_channel_attr(max_ops);
4876
4877 ret |= _verify_back_channel_attr(headerpadsz);
4878 ret |= _verify_back_channel_attr(max_rqst_sz);
4879 ret |= _verify_back_channel_attr(max_resp_sz);
4880 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4881 ret |= _verify_back_channel_attr(max_ops);
4882 ret |= _verify_back_channel_attr(max_reqs);
4883
4884 return ret;
4885}
4886
fc931582
AA		 4887static int _nfs4_proc_create_session(struct nfs_client *clp)
4888{
4889 struct nfs4_session *session = clp->cl_session;
4890 struct nfs41_create_session_args args = {
4891 .client = clp,
4892 .cb_program = NFS4_CALLBACK,
4893 };
4894 struct nfs41_create_session_res res = {
4895 .client = clp,
4896 };
4897 struct rpc_message msg = {
4898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4899 .rpc_argp = &args,
4900 .rpc_resp = &res,
4901 };
4902 int status;
4903
4904 nfs4_init_channel_attrs(&args);
0f91421e 4905 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4906
4907 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4908
8d35301d
AA		 4909 if (!status)
4910 /* Verify the session's negotiated channel_attrs values */
4911 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4912 if (!status) {
4913 /* Increment the clientid slot sequence id */
4914 clp->cl_seqid++;
4915 }
4916
4917 return status;
4918}
4919
4920/*
4921 * Issues a CREATE_SESSION operation to the server.
4922 * It is the responsibility of the caller to verify the session is
4923 * expired before calling this routine.
4924 */
f26468fb 4925int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4926{
4927 int status;
4928 unsigned *ptr;
fc931582
AA		 4929 struct nfs4_session *session = clp->cl_session;
4930
4931 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4932
4933 status = _nfs4_proc_create_session(clp);
4934 if (status)
4935 goto out;
4936
f26468fb
TM		 4937 /* Init and reset the fore channel */
4938 status = nfs4_init_slot_tables(session);
4939 dprintk("slot table initialization returned %d\n", status);
4940 if (status)
4941 goto out;
4942 status = nfs4_reset_slot_tables(session);
4943 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4944 if (status)
4945 goto out;
4946
4947 ptr = (unsigned *)&session->sess_id.data[0];
4948 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4949 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4950out:
4951 dprintk("<-- %s\n", __func__);
4952 return status;
4953}
4954
0f3e66c6
AA		 4955/*
4956 * Issue the over-the-wire RPC DESTROY_SESSION.
4957 * The caller must serialize access to this routine.
4958 */
4959int nfs4_proc_destroy_session(struct nfs4_session *session)
4960{
4961 int status = 0;
4962 struct rpc_message msg;
4963
4964 dprintk("--> nfs4_proc_destroy_session\n");
4965
4966 /* session is still being setup */
4967 if (session->clp->cl_cons_state != NFS_CS_READY)
4968 return status;
4969
4970 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4971 msg.rpc_argp = session;
4972 msg.rpc_resp = NULL;
4973 msg.rpc_cred = NULL;
4974 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4975
4976 if (status)
4977 printk(KERN_WARNING
4978 "Got error %d from the server on DESTROY_SESSION. "
4979 "Session has been destroyed regardless...\n", status);
4980
4981 dprintk("<-- nfs4_proc_destroy_session\n");
4982 return status;
4983}
4984
fccba804
TM		 4985int nfs4_init_session(struct nfs_server *server)
4986{
4987 struct nfs_client *clp = server->nfs_client;
2449ea2e 4988 struct nfs4_session *session;
68bf05ef 4989 unsigned int rsize, wsize;
fccba804
TM		 4990 int ret;
4991
4992 if (!nfs4_has_session(clp))
4993 return 0;
4994
1055d76d
TM		 4995 session = clp->cl_session;
4996 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
4997 return 0;
4998
68bf05ef
AA		 4999 rsize = server->rsize;
5000 if (rsize == 0)
5001 rsize = NFS_MAX_FILE_IO_SIZE;
5002 wsize = server->wsize;
5003 if (wsize == 0)
5004 wsize = NFS_MAX_FILE_IO_SIZE;
5005
68bf05ef
AA		 5006 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5007 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5008
fccba804
TM		 5009 ret = nfs4_recover_expired_lease(server);
5010 if (!ret)
5011 ret = nfs4_check_client_ready(clp);
5012 return ret;
5013}
5014
fc01cea9
AA		 5015/*
5016 * Renew the cl_session lease.
5017 */
d5f8d3fe
TM		 5018struct nfs4_sequence_data {
5019 struct nfs_client *clp;
5020 struct nfs4_sequence_args args;
5021 struct nfs4_sequence_res res;
5022};
5023
dc96aef9
AB		 5024static void nfs41_sequence_release(void *data)
5025{
d5f8d3fe
TM		 5026 struct nfs4_sequence_data *calldata = data;
5027 struct nfs_client *clp = calldata->clp;
dc96aef9 5028
7135840f
AB		 5029 if (atomic_read(&clp->cl_count) > 1)
5030 nfs4_schedule_state_renewal(clp);
5031 nfs_put_client(clp);
d5f8d3fe 5032 kfree(calldata);
dc96aef9
AB		 5033}
5034
aa5190d0
TM		 5035static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5036{
5037 switch(task->tk_status) {
5038 case -NFS4ERR_DELAY:
5039 case -EKEYEXPIRED:
5040 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5041 return -EAGAIN;
5042 default:
5043 nfs4_schedule_state_recovery(clp);
5044 }
5045 return 0;
5046}
5047
dc96aef9 5048static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5049{
d5f8d3fe
TM		 5050 struct nfs4_sequence_data *calldata = data;
5051 struct nfs_client *clp = calldata->clp;
fc01cea9 5052
14516c3a
TM		 5053 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5054 return;
fc01cea9
AA		 5055
5056 if (task->tk_status < 0) {
5057 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5058 if (atomic_read(&clp->cl_count) == 1)
5059 goto out;
fc01cea9 5060
aa5190d0
TM		 5061 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5062 rpc_restart_call_prepare(task);
fc01cea9
AA		 5063 return;
5064 }
5065 }
fc01cea9 5066 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5067out:
fc01cea9
AA		 5068 dprintk("<-- %s\n", __func__);
5069}
5070
5071static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5072{
d5f8d3fe
TM		 5073 struct nfs4_sequence_data *calldata = data;
5074 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5075 struct nfs4_sequence_args *args;
5076 struct nfs4_sequence_res *res;
5077
fc01cea9
AA		 5078 args = task->tk_msg.rpc_argp;
5079 res = task->tk_msg.rpc_resp;
5080
035168ab 5081 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5082 return;
5083 rpc_call_start(task);
5084}
5085
5086static const struct rpc_call_ops nfs41_sequence_ops = {
5087 .rpc_call_done = nfs41_sequence_call_done,
5088 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5089 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5090};
5091
71ac6da9 5092static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5093{
d5f8d3fe 5094 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5095 struct rpc_message msg = {
5096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5097 .rpc_cred = cred,
5098 };
71ac6da9
TM		 5099 struct rpc_task_setup task_setup_data = {
5100 .rpc_client = clp->cl_rpcclient,
5101 .rpc_message = &msg,
5102 .callback_ops = &nfs41_sequence_ops,
5103 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5104 };
fc01cea9 5105
7135840f 5106 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5107 return ERR_PTR(-EIO);
d5f8d3fe
TM		 5108 calldata = kmalloc(sizeof(*calldata), GFP_NOFS);
5109 if (calldata == NULL) {
7135840f 5110 nfs_put_client(clp);
71ac6da9 5111 return ERR_PTR(-ENOMEM);
fc01cea9 5112 }
d5f8d3fe
TM		 5113 calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5114 msg.rpc_argp = &calldata->args;
5115 msg.rpc_resp = &calldata->res;
5116 calldata->clp = clp;
71ac6da9 5117 task_setup_data.callback_data = calldata;
fc01cea9 5118
71ac6da9
TM		 5119 return rpc_run_task(&task_setup_data);
5120}
5121
5122static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5123{
5124 struct rpc_task *task;
5125 int ret = 0;
5126
5127 task = _nfs41_proc_sequence(clp, cred);
5128 if (IS_ERR(task))
5129 ret = PTR_ERR(task);
5130 else
5131 rpc_put_task(task);
5132 dprintk("<-- %s status=%d\n", __func__, ret);
5133 return ret;
5134}
5135
5136static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5137{
5138 struct rpc_task *task;
5139 int ret;
5140
5141 task = _nfs41_proc_sequence(clp, cred);
5142 if (IS_ERR(task)) {
5143 ret = PTR_ERR(task);
5144 goto out;
5145 }
5146 ret = rpc_wait_for_completion_task(task);
5147 if (!ret)
5148 ret = task->tk_status;
5149 rpc_put_task(task);
5150out:
5151 dprintk("<-- %s status=%d\n", __func__, ret);
5152 return ret;
fc01cea9
AA		 5153}
5154
fce5c838
RL		 5155struct nfs4_reclaim_complete_data {
5156 struct nfs_client *clp;
5157 struct nfs41_reclaim_complete_args arg;
5158 struct nfs41_reclaim_complete_res res;
5159};
5160
5161static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5162{
5163 struct nfs4_reclaim_complete_data *calldata = data;
5164
b257957e 5165 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5166 if (nfs41_setup_sequence(calldata->clp->cl_session,
5167 &calldata->arg.seq_args,
fce5c838
RL		 5168 &calldata->res.seq_res, 0, task))
5169 return;
5170
5171 rpc_call_start(task);
5172}
5173
aa5190d0
TM		 5174static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5175{
5176 switch(task->tk_status) {
5177 case 0:
5178 case -NFS4ERR_COMPLETE_ALREADY:
5179 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5180 break;
5181 case -NFS4ERR_DELAY:
5182 case -EKEYEXPIRED:
5183 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5184 return -EAGAIN;
5185 default:
5186 nfs4_schedule_state_recovery(clp);
5187 }
5188 return 0;
5189}
5190
fce5c838
RL		 5191static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5192{
5193 struct nfs4_reclaim_complete_data *calldata = data;
5194 struct nfs_client *clp = calldata->clp;
5195 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5196
5197 dprintk("--> %s\n", __func__);
14516c3a
TM		 5198 if (!nfs41_sequence_done(task, res))
5199 return;
fce5c838 5200
aa5190d0
TM		 5201 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5202 rpc_restart_call_prepare(task);
5203 return;
5204 }
fce5c838
RL		 5205 dprintk("<-- %s\n", __func__);
5206}
5207
5208static void nfs4_free_reclaim_complete_data(void *data)
5209{
5210 struct nfs4_reclaim_complete_data *calldata = data;
5211
5212 kfree(calldata);
5213}
5214
5215static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5216 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5217 .rpc_call_done = nfs4_reclaim_complete_done,
5218 .rpc_release = nfs4_free_reclaim_complete_data,
5219};
5220
5221/*
5222 * Issue a global reclaim complete.
5223 */
5224static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5225{
5226 struct nfs4_reclaim_complete_data *calldata;
5227 struct rpc_task *task;
5228 struct rpc_message msg = {
5229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5230 };
5231 struct rpc_task_setup task_setup_data = {
5232 .rpc_client = clp->cl_rpcclient,
5233 .rpc_message = &msg,
5234 .callback_ops = &nfs4_reclaim_complete_call_ops,
5235 .flags = RPC_TASK_ASYNC,
5236 };
5237 int status = -ENOMEM;
5238
5239 dprintk("--> %s\n", __func__);
8535b2be 5240 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5241 if (calldata == NULL)
5242 goto out;
5243 calldata->clp = clp;
5244 calldata->arg.one_fs = 0;
5245 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5246
5247 msg.rpc_argp = &calldata->arg;
5248 msg.rpc_resp = &calldata->res;
5249 task_setup_data.callback_data = calldata;
5250 task = rpc_run_task(&task_setup_data);
acf82b85 5251 if (IS_ERR(task)) {
fce5c838 5252 status = PTR_ERR(task);
acf82b85
DC		 5253 goto out;
5254 }
fce5c838 5255 rpc_put_task(task);
acf82b85 5256 return 0;
fce5c838
RL		 5257out:
5258 dprintk("<-- %s status=%d\n", __func__, status);
5259 return status;
5260}
557134a3
AA		 5261#endif /* CONFIG_NFS_V4_1 */
5262
591d71cb 5263struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5264 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5265 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5266 .recover_open = nfs4_open_reclaim,
5267 .recover_lock = nfs4_lock_reclaim,
591d71cb 5268 .establish_clid = nfs4_init_clientid,
90a16617 5269 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5270};
5271
591d71cb
AA		 5272#if defined(CONFIG_NFS_V4_1)
5273struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5274 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5275 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5276 .recover_open = nfs4_open_reclaim,
5277 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5278 .establish_clid = nfs41_init_clientid,
b4b82607 5279 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5280 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5281};
5282#endif /* CONFIG_NFS_V4_1 */
5283
5284struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5285 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5286 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5287 .recover_open = nfs4_open_expired,
5288 .recover_lock = nfs4_lock_expired,
5289 .establish_clid = nfs4_init_clientid,
90a16617 5290 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5291};
5292
5293#if defined(CONFIG_NFS_V4_1)
5294struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5295 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5296 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5297 .recover_open = nfs4_open_expired,
5298 .recover_lock = nfs4_lock_expired,
4d643d1d 5299 .establish_clid = nfs41_init_clientid,
b4b82607 5300 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5301};
591d71cb 5302#endif /* CONFIG_NFS_V4_1 */
1da177e4 5303
29fba38b
BH		 5304struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5305 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5306 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5307 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5308};
5309
5310#if defined(CONFIG_NFS_V4_1)
5311struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5312 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5313 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5314 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5315};
5316#endif
5317
97dc1359
TM		 5318static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5319 .minor_version = 0,
5320 .call_sync = _nfs4_call_sync,
e047a10c 5321 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5322 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5323 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5324 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5325};
5326
5327#if defined(CONFIG_NFS_V4_1)
5328static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5329 .minor_version = 1,
5330 .call_sync = _nfs4_call_sync_session,
e047a10c 5331 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5332 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5333 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5334 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5335};
5336#endif
5337
97dc1359
TM		 5338const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5339 [0] = &nfs_v4_0_minor_ops,
5340#if defined(CONFIG_NFS_V4_1)
5341 [1] = &nfs_v4_1_minor_ops,
5342#endif
5343};
5344
92e1d5be 5345static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5346 .permission = nfs_permission,
5347 .getattr = nfs_getattr,
5348 .setattr = nfs_setattr,
5349 .getxattr = nfs4_getxattr,
5350 .setxattr = nfs4_setxattr,
5351 .listxattr = nfs4_listxattr,
5352};
5353
509de811 5354const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5355 .version = 4, /* protocol version */
5356 .dentry_ops = &nfs4_dentry_operations,
5357 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5358 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5359 .getroot = nfs4_proc_get_root,
5360 .getattr = nfs4_proc_getattr,
5361 .setattr = nfs4_proc_setattr,
2b3de441 5362 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5363 .lookup = nfs4_proc_lookup,
5364 .access = nfs4_proc_access,
5365 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5366 .create = nfs4_proc_create,
5367 .remove = nfs4_proc_remove,
5368 .unlink_setup = nfs4_proc_unlink_setup,
5369 .unlink_done = nfs4_proc_unlink_done,
5370 .rename = nfs4_proc_rename,
d3d4152a
JL		 5371 .rename_setup = nfs4_proc_rename_setup,
5372 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 5373 .link = nfs4_proc_link,
5374 .symlink = nfs4_proc_symlink,
5375 .mkdir = nfs4_proc_mkdir,
5376 .rmdir = nfs4_proc_remove,
5377 .readdir = nfs4_proc_readdir,
5378 .mknod = nfs4_proc_mknod,
5379 .statfs = nfs4_proc_statfs,
5380 .fsinfo = nfs4_proc_fsinfo,
5381 .pathconf = nfs4_proc_pathconf,
e9326dca 5382 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5383 .decode_dirent = nfs4_decode_dirent,
5384 .read_setup = nfs4_proc_read_setup,
ec06c096 5385 .read_done = nfs4_read_done,
1da177e4 5386 .write_setup = nfs4_proc_write_setup,
788e7a89 5387 .write_done = nfs4_write_done,
1da177e4 5388 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5389 .commit_done = nfs4_commit_done,
1da177e4 5390 .lock = nfs4_proc_lock,
e50a1c2e 5391 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5392 .close_context = nfs4_close_context,
2b484297 5393 .open_context = nfs4_atomic_open,
1da177e4
LT		 5394};
5395
5396/*
5397 * Local variables:
5398 * c-basic-offset: 8
5399 * End:
5400 */
Linux 6.x block layer and io_uring tree(s)