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NFSv4.1: There is no need to init the session more than once...
[net-next-2.6.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
26e976a8 306static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 307{
7539bbab 308 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 309 spin_lock(&clp->cl_lock);
310 if (time_before(clp->cl_last_renewal,timestamp))
311 clp->cl_last_renewal = timestamp;
312 spin_unlock(&clp->cl_lock);
313}
314
cccef3b9
AA		 315#if defined(CONFIG_NFS_V4_1)
316
e2c4ab3c
AA		 317/*
318 * nfs4_free_slot - free a slot and efficiently update slot table.
319 *
320 * freeing a slot is trivially done by clearing its respective bit
321 * in the bitmap.
322 * If the freed slotid equals highest_used_slotid we want to update it
323 * so that the server would be able to size down the slot table if needed,
324 * otherwise we know that the highest_used_slotid is still in use.
325 * When updating highest_used_slotid there may be "holes" in the bitmap
326 * so we need to scan down from highest_used_slotid to 0 looking for the now
327 * highest slotid in use.
328 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 329 *
330 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 331 */
332static void
333nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
334{
335 int slotid = free_slotid;
336
e2c4ab3c
AA		 337 /* clear used bit in bitmap */
338 __clear_bit(slotid, tbl->used_slots);
339
340 /* update highest_used_slotid when it is freed */
341 if (slotid == tbl->highest_used_slotid) {
342 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 343 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 344 tbl->highest_used_slotid = slotid;
345 else
346 tbl->highest_used_slotid = -1;
347 }
e2c4ab3c
AA		 348 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
349 free_slotid, tbl->highest_used_slotid);
350}
351
3bfb0fc5
AB		 352/*
353 * Signal state manager thread if session is drained
354 */
355static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
356{
689cf5c1
AB		 357 struct rpc_task *task;
358
a2118c33 359 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 360 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
361 if (task)
362 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 363 return;
364 }
365
366 if (ses->fc_slot_table.highest_used_slotid != -1)
367 return;
368
369 dprintk("%s COMPLETE: Session Drained\n", __func__);
370 complete(&ses->complete);
371}
372
d185a334 373static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 374{
375 struct nfs4_slot_table *tbl;
376
d185a334 377 tbl = &res->sr_session->fc_slot_table;
13615871 378 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 379 /* just wake up the next guy waiting since
380 * we may have not consumed a slot after all */
691daf3b 381 dprintk("%s: No slot\n", __func__);
35dc1d74 382 return;
13615871 383 }
ea028ac9 384
35dc1d74
TM		 385 spin_lock(&tbl->slot_tbl_lock);
386 nfs4_free_slot(tbl, res->sr_slotid);
d185a334 387 nfs41_check_drain_session_complete(res->sr_session);
35dc1d74
TM		 388 spin_unlock(&tbl->slot_tbl_lock);
389 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 390}
391
d185a334 392static void nfs41_sequence_done(struct nfs4_sequence_res *res)
b0df806c
AA		 393{
394 unsigned long timestamp;
395 struct nfs4_slot_table *tbl;
396 struct nfs4_slot *slot;
397
398 /*
399 * sr_status remains 1 if an RPC level error occurred. The server
400 * may or may not have processed the sequence operation..
401 * Proceed as if the server received and processed the sequence
402 * operation.
403 */
404 if (res->sr_status == 1)
405 res->sr_status = NFS_OK;
406
407 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
408 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
409 goto out;
410
691daf3b 411 /* Check the SEQUENCE operation status */
b0df806c 412 if (res->sr_status == 0) {
d185a334
TM		 413 struct nfs_client *clp = res->sr_session->clp;
414 tbl = &res->sr_session->fc_slot_table;
691daf3b 415 slot = tbl->slots + res->sr_slotid;
b0df806c
AA		 416 /* Update the slot's sequence and clientid lease timer */
417 ++slot->seq_nr;
418 timestamp = res->sr_renewal_time;
419 spin_lock(&clp->cl_lock);
420 if (time_before(clp->cl_last_renewal, timestamp))
421 clp->cl_last_renewal = timestamp;
422 spin_unlock(&clp->cl_lock);
0629e370 423 /* Check sequence flags */
7135840f
AB		 424 if (atomic_read(&clp->cl_count) > 1)
425 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
b0df806c
AA		 426 }
427out:
428 /* The session may be reset by one of the error handlers. */
429 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 430 nfs41_sequence_free_slot(res);
b0df806c
AA		 431}
432
df896455
TM		 433static void nfs4_sequence_done(const struct nfs_server *server,
434 struct nfs4_sequence_res *res, int rpc_status)
435{
436 if (res->sr_session != NULL)
437 nfs41_sequence_done(res);
438}
439
510b8175
BH		 440/*
441 * nfs4_find_slot - efficiently look for a free slot
442 *
443 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
444 * If found, we mark the slot as used, update the highest_used_slotid,
445 * and respectively set up the sequence operation args.
446 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 447 *
448 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 449 */
450static u8
40ead580 451nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 452{
453 int slotid;
454 u8 ret_id = NFS4_MAX_SLOT_TABLE;
455 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
456
510b8175
BH		 457 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
458 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
459 tbl->max_slots);
460 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
461 if (slotid >= tbl->max_slots)
462 goto out;
463 __set_bit(slotid, tbl->used_slots);
464 if (slotid > tbl->highest_used_slotid)
465 tbl->highest_used_slotid = slotid;
466 ret_id = slotid;
467out:
468 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
469 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 470 return ret_id;
471}
472
ce5039c1
AA		 473static int nfs41_setup_sequence(struct nfs4_session *session,
474 struct nfs4_sequence_args *args,
475 struct nfs4_sequence_res *res,
476 int cache_reply,
477 struct rpc_task *task)
478{
fbcd4abc
AA		 479 struct nfs4_slot *slot;
480 struct nfs4_slot_table *tbl;
481 u8 slotid;
482
483 dprintk("--> %s\n", __func__);
ce5039c1
AA		 484 /* slot already allocated? */
485 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
486 return 0;
487
ce5039c1 488 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 489 tbl = &session->fc_slot_table;
490
491 spin_lock(&tbl->slot_tbl_lock);
a2118c33 492 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 493 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 494 /*
495 * The state manager will wait until the slot table is empty.
496 * Schedule the reset thread
497 */
05f0d236 498 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 499 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 500 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 501 return -EAGAIN;
b069d94a
AA		 502 }
503
689cf5c1
AB		 504 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
505 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
506 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
507 spin_unlock(&tbl->slot_tbl_lock);
508 dprintk("%s enforce FIFO order\n", __func__);
509 return -EAGAIN;
510 }
511
40ead580 512 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 513 if (slotid == NFS4_MAX_SLOT_TABLE) {
514 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
515 spin_unlock(&tbl->slot_tbl_lock);
516 dprintk("<-- %s: no free slots\n", __func__);
517 return -EAGAIN;
518 }
519 spin_unlock(&tbl->slot_tbl_lock);
520
689cf5c1 521 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 522 slot = tbl->slots + slotid;
99fe60d0 523 args->sa_session = session;
fbcd4abc
AA		 524 args->sa_slotid = slotid;
525 args->sa_cache_this = cache_reply;
526
527 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
528
99fe60d0 529 res->sr_session = session;
fbcd4abc
AA		 530 res->sr_slotid = slotid;
531 res->sr_renewal_time = jiffies;
2a6e26cd 532 res->sr_status_flags = 0;
fbcd4abc
AA		 533 /*
534 * sr_status is only set in decode_sequence, and so will remain
535 * set to 1 if an rpc level failure occurs.
536 */
537 res->sr_status = 1;
ce5039c1
AA		 538 return 0;
539}
540
035168ab 541int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 542 struct nfs4_sequence_args *args,
543 struct nfs4_sequence_res *res,
544 int cache_reply,
545 struct rpc_task *task)
546{
035168ab 547 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 548 int ret = 0;
549
035168ab
TM		 550 if (session == NULL) {
551 args->sa_session = NULL;
552 res->sr_session = NULL;
553 goto out;
554 }
555
ce5039c1 556 dprintk("--> %s clp %p session %p sr_slotid %d\n",
035168ab 557 __func__, session->clp, session, res->sr_slotid);
ce5039c1 558
035168ab 559 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 560 task);
ce5039c1
AA		 561out:
562 dprintk("<-- %s status=%d\n", __func__, ret);
563 return ret;
564}
565
566struct nfs41_call_sync_data {
035168ab 567 const struct nfs_server *seq_server;
ce5039c1
AA		 568 struct nfs4_sequence_args *seq_args;
569 struct nfs4_sequence_res *seq_res;
570 int cache_reply;
571};
572
573static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
574{
575 struct nfs41_call_sync_data *data = calldata;
576
035168ab
TM		 577 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
578
579 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 580 data->seq_res, data->cache_reply, task))
581 return;
582 rpc_call_start(task);
583}
584
b257957e
AB		 585static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
586{
587 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
588 nfs41_call_sync_prepare(task, calldata);
589}
590
69ab40c4
AA		 591static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
592{
593 struct nfs41_call_sync_data *data = calldata;
594
d185a334 595 nfs41_sequence_done(data->seq_res);
69ab40c4
AA		 596}
597
ce5039c1
AA		 598struct rpc_call_ops nfs41_call_sync_ops = {
599 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 600 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 601};
602
b257957e
AB		 603struct rpc_call_ops nfs41_call_priv_sync_ops = {
604 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
605 .rpc_call_done = nfs41_call_sync_done,
606};
607
035168ab 608static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 609 struct rpc_message *msg,
610 struct nfs4_sequence_args *args,
611 struct nfs4_sequence_res *res,
b257957e
AB		 612 int cache_reply,
613 int privileged)
ce5039c1
AA		 614{
615 int ret;
616 struct rpc_task *task;
617 struct nfs41_call_sync_data data = {
035168ab 618 .seq_server = server,
ce5039c1
AA		 619 .seq_args = args,
620 .seq_res = res,
621 .cache_reply = cache_reply,
622 };
623 struct rpc_task_setup task_setup = {
035168ab 624 .rpc_client = server->client,
ce5039c1
AA		 625 .rpc_message = msg,
626 .callback_ops = &nfs41_call_sync_ops,
627 .callback_data = &data
628 };
629
630 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 631 if (privileged)
632 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 633 task = rpc_run_task(&task_setup);
634 if (IS_ERR(task))
635 ret = PTR_ERR(task);
636 else {
637 ret = task->tk_status;
638 rpc_put_task(task);
639 }
640 return ret;
641}
642
cccef3b9
AA		 643int _nfs4_call_sync_session(struct nfs_server *server,
644 struct rpc_message *msg,
645 struct nfs4_sequence_args *args,
646 struct nfs4_sequence_res *res,
647 int cache_reply)
648{
035168ab 649 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 650}
651
df896455
TM		 652#else
653static void nfs4_sequence_done(const struct nfs_server *server,
654 struct nfs4_sequence_res *res, int rpc_status)
655{
656}
cccef3b9
AA		 657#endif /* CONFIG_NFS_V4_1 */
658
659int _nfs4_call_sync(struct nfs_server *server,
660 struct rpc_message *msg,
661 struct nfs4_sequence_args *args,
662 struct nfs4_sequence_res *res,
663 int cache_reply)
664{
f3752975 665 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 666 return rpc_call_sync(server->client, msg, 0);
667}
668
669#define nfs4_call_sync(server, msg, args, res, cache_reply) \
97dc1359 670 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
cccef3b9
AA		 671 &(res)->seq_res, (cache_reply))
672
38478b24 673static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 674{
38478b24 675 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 676
38478b24 677 spin_lock(&dir->i_lock);
40d24704
TM		 678 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
679 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 680 nfs_force_lookup_revalidate(dir);
40d24704 681 nfsi->change_attr = cinfo->after;
38478b24 682 spin_unlock(&dir->i_lock);
1da177e4
LT		 683}
684
e56e0b78 685struct nfs4_opendata {
c6d00e63 686 struct kref kref;
e56e0b78
TM		 687 struct nfs_openargs o_arg;
688 struct nfs_openres o_res;
cdd4e68b
TM		 689 struct nfs_open_confirmargs c_arg;
690 struct nfs_open_confirmres c_res;
e56e0b78
TM		 691 struct nfs_fattr f_attr;
692 struct nfs_fattr dir_attr;
ad389da7 693 struct path path;
e56e0b78
TM		 694 struct dentry *dir;
695 struct nfs4_state_owner *owner;
aac00a8d 696 struct nfs4_state *state;
e56e0b78 697 struct iattr attrs;
26e976a8 698 unsigned long timestamp;
3e309914 699 unsigned int rpc_done : 1;
24ac23ab
TM		 700 int rpc_status;
701 int cancelled;
e56e0b78
TM		 702};
703
2ced46c2
TM		 704
705static void nfs4_init_opendata_res(struct nfs4_opendata *p)
706{
707 p->o_res.f_attr = &p->f_attr;
708 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 709 p->o_res.seqid = p->o_arg.seqid;
710 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 711 p->o_res.server = p->o_arg.server;
712 nfs_fattr_init(&p->f_attr);
713 nfs_fattr_init(&p->dir_attr);
578e4585 714 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 715}
716
ad389da7 717static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 718 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 719 const struct iattr *attrs,
720 gfp_t gfp_mask)
e56e0b78 721{
ad389da7 722 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 723 struct inode *dir = parent->d_inode;
724 struct nfs_server *server = NFS_SERVER(dir);
725 struct nfs4_opendata *p;
726
8535b2be 727 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 728 if (p == NULL)
729 goto err;
8535b2be 730 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 731 if (p->o_arg.seqid == NULL)
732 goto err_free;
f6948697
AV		 733 path_get(path);
734 p->path = *path;
e56e0b78
TM		 735 p->dir = parent;
736 p->owner = sp;
737 atomic_inc(&sp->so_count);
738 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 739 p->o_arg.open_flags = flags;
740 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 741 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 742 p->o_arg.id = sp->so_owner_id.id;
ad389da7 743 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 744 p->o_arg.server = server;
745 p->o_arg.bitmask = server->attr_bitmask;
746 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 747 if (flags & O_CREAT) {
748 u32 *s;
749
e56e0b78
TM		 750 p->o_arg.u.attrs = &p->attrs;
751 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 752 s = (u32 *) p->o_arg.u.verifier.data;
753 s[0] = jiffies;
754 s[1] = current->pid;
e56e0b78 755 }
cdd4e68b
TM		 756 p->c_arg.fh = &p->o_res.fh;
757 p->c_arg.stateid = &p->o_res.stateid;
758 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 759 nfs4_init_opendata_res(p);
c6d00e63 760 kref_init(&p->kref);
e56e0b78
TM		 761 return p;
762err_free:
763 kfree(p);
764err:
765 dput(parent);
766 return NULL;
767}
768
c6d00e63 769static void nfs4_opendata_free(struct kref *kref)
e56e0b78 770{
c6d00e63
TM		 771 struct nfs4_opendata *p = container_of(kref,
772 struct nfs4_opendata, kref);
773
774 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 775 if (p->state != NULL)
776 nfs4_put_open_state(p->state);
c6d00e63
TM		 777 nfs4_put_state_owner(p->owner);
778 dput(p->dir);
31f31db1 779 path_put(&p->path);
c6d00e63
TM		 780 kfree(p);
781}
782
783static void nfs4_opendata_put(struct nfs4_opendata *p)
784{
785 if (p != NULL)
786 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 787}
788
06f814a3
TM		 789static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
790{
06f814a3
TM		 791 int ret;
792
06f814a3 793 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 794 return ret;
795}
796
dc0b027d 797static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 798{
799 int ret = 0;
dc0b027d
TM		 800
801 if (open_mode & O_EXCL)
802 goto out;
803 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 804 case FMODE_READ:
88069f77
TM		 805 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
806 && state->n_rdonly != 0;
6ee41268
TM		 807 break;
808 case FMODE_WRITE:
88069f77
TM		 809 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
810 && state->n_wronly != 0;
6ee41268
TM		 811 break;
812 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 813 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
814 && state->n_rdwr != 0;
6ee41268 815 }
dc0b027d 816out:
6ee41268
TM		 817 return ret;
818}
819
dc0b027d 820static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 821{
dc0b027d 822 if ((delegation->type & fmode) != fmode)
aac00a8d 823 return 0;
15c831bf 824 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 825 return 0;
b7391f44 826 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 827 return 1;
828}
829
dc0b027d 830static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 831{
dc0b027d 832 switch (fmode) {
e7616923
TM		 833 case FMODE_WRITE:
834 state->n_wronly++;
835 break;
836 case FMODE_READ:
837 state->n_rdonly++;
838 break;
839 case FMODE_READ|FMODE_WRITE:
840 state->n_rdwr++;
841 }
dc0b027d 842 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 843}
844
dc0b027d 845static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 846{
847 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
848 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
849 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 850 switch (fmode) {
003707c7
TM		 851 case FMODE_READ:
852 set_bit(NFS_O_RDONLY_STATE, &state->flags);
853 break;
854 case FMODE_WRITE:
855 set_bit(NFS_O_WRONLY_STATE, &state->flags);
856 break;
857 case FMODE_READ|FMODE_WRITE:
858 set_bit(NFS_O_RDWR_STATE, &state->flags);
859 }
e7616923
TM		 860}
861
dc0b027d 862static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 863{
8bda4e4c 864 write_seqlock(&state->seqlock);
dc0b027d 865 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 866 write_sequnlock(&state->seqlock);
003707c7
TM		 867}
868
dc0b027d 869static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 870{
8bda4e4c
TM		 871 /*
872 * Protect the call to nfs4_state_set_mode_locked and
873 * serialise the stateid update
874 */
875 write_seqlock(&state->seqlock);
003707c7
TM		 876 if (deleg_stateid != NULL) {
877 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
878 set_bit(NFS_DELEGATED_STATE, &state->flags);
879 }
880 if (open_stateid != NULL)
dc0b027d 881 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 882 write_sequnlock(&state->seqlock);
883 spin_lock(&state->owner->so_lock);
dc0b027d 884 update_open_stateflags(state, fmode);
ec073428 885 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 886}
887
dc0b027d 888static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 889{
890 struct nfs_inode *nfsi = NFS_I(state->inode);
891 struct nfs_delegation *deleg_cur;
892 int ret = 0;
893
dc0b027d 894 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 895
896 rcu_read_lock();
897 deleg_cur = rcu_dereference(nfsi->delegation);
898 if (deleg_cur == NULL)
899 goto no_delegation;
900
901 spin_lock(&deleg_cur->lock);
902 if (nfsi->delegation != deleg_cur ||
dc0b027d 903 (deleg_cur->type & fmode) != fmode)
34310430
TM		 904 goto no_delegation_unlock;
905
906 if (delegation == NULL)
907 delegation = &deleg_cur->stateid;
908 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
909 goto no_delegation_unlock;
910
b7391f44 911 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 912 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 913 ret = 1;
914no_delegation_unlock:
915 spin_unlock(&deleg_cur->lock);
916no_delegation:
917 rcu_read_unlock();
918
919 if (!ret && open_stateid != NULL) {
dc0b027d 920 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 921 ret = 1;
922 }
923
924 return ret;
925}
926
927
dc0b027d 928static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 929{
930 struct nfs_delegation *delegation;
931
932 rcu_read_lock();
933 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 934 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 935 rcu_read_unlock();
936 return;
937 }
938 rcu_read_unlock();
939 nfs_inode_return_delegation(inode);
940}
941
6ee41268 942static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 943{
944 struct nfs4_state *state = opendata->state;
945 struct nfs_inode *nfsi = NFS_I(state->inode);
946 struct nfs_delegation *delegation;
dc0b027d
TM		 947 int open_mode = opendata->o_arg.open_flags & O_EXCL;
948 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 949 nfs4_stateid stateid;
950 int ret = -EAGAIN;
951
aac00a8d 952 for (;;) {
dc0b027d 953 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 954 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 955 if (can_open_cached(state, fmode, open_mode)) {
956 update_open_stateflags(state, fmode);
6ee41268 957 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 958 goto out_return_state;
959 }
960 spin_unlock(&state->owner->so_lock);
961 }
34310430
TM		 962 rcu_read_lock();
963 delegation = rcu_dereference(nfsi->delegation);
964 if (delegation == NULL ||
dc0b027d 965 !can_open_delegated(delegation, fmode)) {
34310430 966 rcu_read_unlock();
aac00a8d 967 break;
34310430 968 }
aac00a8d
TM		 969 /* Save the delegation */
970 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
971 rcu_read_unlock();
af22f94a 972 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 973 if (ret != 0)
974 goto out;
975 ret = -EAGAIN;
34310430
TM		 976
977 /* Try to update the stateid using the delegation */
dc0b027d 978 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 979 goto out_return_state;
aac00a8d 980 }
aac00a8d
TM		 981out:
982 return ERR_PTR(ret);
983out_return_state:
984 atomic_inc(&state->count);
985 return state;
986}
987
24ac23ab
TM		 988static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
989{
990 struct inode *inode;
991 struct nfs4_state *state = NULL;
003707c7 992 struct nfs_delegation *delegation;
1b370bc2 993 int ret;
24ac23ab 994
aac00a8d 995 if (!data->rpc_done) {
6ee41268 996 state = nfs4_try_open_cached(data);
aac00a8d
TM		 997 goto out;
998 }
999
1b370bc2 1000 ret = -EAGAIN;
24ac23ab 1001 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1002 goto err;
24ac23ab 1003 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1004 ret = PTR_ERR(inode);
03f28e3a 1005 if (IS_ERR(inode))
1b370bc2
TM		 1006 goto err;
1007 ret = -ENOMEM;
24ac23ab
TM		 1008 state = nfs4_get_open_state(inode, data->owner);
1009 if (state == NULL)
1b370bc2 1010 goto err_put_inode;
549d6ed5 1011 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1012 int delegation_flags = 0;
1013
003707c7
TM		 1014 rcu_read_lock();
1015 delegation = rcu_dereference(NFS_I(inode)->delegation);
1016 if (delegation)
1017 delegation_flags = delegation->flags;
1018 rcu_read_unlock();
15c831bf 1019 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1020 nfs_inode_set_delegation(state->inode,
1021 data->owner->so_cred,
1022 &data->o_res);
1023 else
1024 nfs_inode_reclaim_delegation(state->inode,
1025 data->owner->so_cred,
1026 &data->o_res);
1027 }
34310430
TM		 1028
1029 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1030 data->o_arg.fmode);
24ac23ab 1031 iput(inode);
aac00a8d 1032out:
24ac23ab 1033 return state;
1b370bc2
TM		 1034err_put_inode:
1035 iput(inode);
1036err:
1037 return ERR_PTR(ret);
24ac23ab
TM		 1038}
1039
864472e9
TM		 1040static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1041{
1042 struct nfs_inode *nfsi = NFS_I(state->inode);
1043 struct nfs_open_context *ctx;
1044
1045 spin_lock(&state->inode->i_lock);
1046 list_for_each_entry(ctx, &nfsi->open_files, list) {
1047 if (ctx->state != state)
1048 continue;
1049 get_nfs_open_context(ctx);
1050 spin_unlock(&state->inode->i_lock);
1051 return ctx;
1052 }
1053 spin_unlock(&state->inode->i_lock);
1054 return ERR_PTR(-ENOENT);
1055}
1056
6f220ed5
TM		 1057static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1058{
1059 struct nfs4_opendata *opendata;
1060
8535b2be 1061 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1062 if (opendata == NULL)
1063 return ERR_PTR(-ENOMEM);
1064 opendata->state = state;
1065 atomic_inc(&state->count);
1066 return opendata;
1067}
1068
dc0b027d 1069static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1070{
2ced46c2 1071 struct nfs4_state *newstate;
864472e9
TM		 1072 int ret;
1073
dc0b027d
TM		 1074 opendata->o_arg.open_flags = 0;
1075 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1076 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1077 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1078 nfs4_init_opendata_res(opendata);
b257957e 1079 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1080 if (ret != 0)
1081 return ret;
2ced46c2 1082 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1083 if (IS_ERR(newstate))
1084 return PTR_ERR(newstate);
dc0b027d 1085 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1086 *res = newstate;
864472e9
TM		 1087 return 0;
1088}
1089
1090static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1091{
864472e9 1092 struct nfs4_state *newstate;
864472e9
TM		 1093 int ret;
1094
1095 /* memory barrier prior to reading state->n_* */
2ced46c2 1096 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1097 smp_rmb();
1098 if (state->n_rdwr != 0) {
2ced46c2 1099 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1100 if (ret != 0)
1101 return ret;
2ced46c2
TM		 1102 if (newstate != state)
1103 return -ESTALE;
864472e9
TM		 1104 }
1105 if (state->n_wronly != 0) {
2ced46c2 1106 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1107 if (ret != 0)
1108 return ret;
2ced46c2
TM		 1109 if (newstate != state)
1110 return -ESTALE;
864472e9
TM		 1111 }
1112 if (state->n_rdonly != 0) {
2ced46c2 1113 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1114 if (ret != 0)
1115 return ret;
2ced46c2
TM		 1116 if (newstate != state)
1117 return -ESTALE;
864472e9 1118 }
1ac7e2fd
TM		 1119 /*
1120 * We may have performed cached opens for all three recoveries.
1121 * Check if we need to update the current stateid.
1122 */
1123 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1124 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1125 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1126 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1127 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1128 write_sequnlock(&state->seqlock);
1ac7e2fd 1129 }
864472e9
TM		 1130 return 0;
1131}
1132
1da177e4
LT		 1133/*
1134 * OPEN_RECLAIM:
1135 * reclaim state on the server after a reboot.
1da177e4 1136 */
539cd03a 1137static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1138{
1ac7e2fd 1139 struct nfs_delegation *delegation;
864472e9 1140 struct nfs4_opendata *opendata;
dc0b027d 1141 fmode_t delegation_type = 0;
1da177e4
LT		 1142 int status;
1143
6f220ed5
TM		 1144 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1145 if (IS_ERR(opendata))
1146 return PTR_ERR(opendata);
864472e9
TM		 1147 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1148 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1149 rcu_read_lock();
1150 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1151 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1152 delegation_type = delegation->type;
1ac7e2fd 1153 rcu_read_unlock();
864472e9
TM		 1154 opendata->o_arg.u.delegation_type = delegation_type;
1155 status = nfs4_open_recover(opendata, state);
c6d00e63 1156 nfs4_opendata_put(opendata);
1da177e4
LT		 1157 return status;
1158}
1159
539cd03a 1160static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1161{
1162 struct nfs_server *server = NFS_SERVER(state->inode);
1163 struct nfs4_exception exception = { };
1164 int err;
1165 do {
539cd03a 1166 err = _nfs4_do_open_reclaim(ctx, state);
2c643488 1167 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 1168 break;
1169 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1170 } while (exception.retry);
1171 return err;
1172}
1173
864472e9
TM		 1174static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1175{
1176 struct nfs_open_context *ctx;
1177 int ret;
1178
1179 ctx = nfs4_state_find_open_context(state);
1180 if (IS_ERR(ctx))
1181 return PTR_ERR(ctx);
539cd03a 1182 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1183 put_nfs_open_context(ctx);
1184 return ret;
1185}
1186
13437e12 1187static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1188{
e56e0b78 1189 struct nfs4_opendata *opendata;
864472e9 1190 int ret;
1da177e4 1191
6f220ed5
TM		 1192 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1193 if (IS_ERR(opendata))
1194 return PTR_ERR(opendata);
e56e0b78 1195 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1196 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1197 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1198 ret = nfs4_open_recover(opendata, state);
c6d00e63 1199 nfs4_opendata_put(opendata);
864472e9 1200 return ret;
1da177e4
LT		 1201}
1202
13437e12 1203int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1204{
1205 struct nfs4_exception exception = { };
539cd03a 1206 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1207 int err;
1208 do {
13437e12 1209 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1210 switch (err) {
1211 case 0:
965b5d67
TM		 1212 case -ENOENT:
1213 case -ESTALE:
1214 goto out;
bcfa49f6
RL		 1215 case -NFS4ERR_BADSESSION:
1216 case -NFS4ERR_BADSLOT:
1217 case -NFS4ERR_BAD_HIGH_SLOT:
1218 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1219 case -NFS4ERR_DEADSESSION:
1220 nfs4_schedule_state_recovery(
1221 server->nfs_client);
1222 goto out;
1da177e4
LT		 1223 case -NFS4ERR_STALE_CLIENTID:
1224 case -NFS4ERR_STALE_STATEID:
1225 case -NFS4ERR_EXPIRED:
1226 /* Don't recall a delegation if it was lost */
7539bbab 1227 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1228 goto out;
1229 case -ERESTARTSYS:
1230 /*
1231 * The show must go on: exit, but mark the
1232 * stateid as needing recovery.
1233 */
1234 case -NFS4ERR_ADMIN_REVOKED:
1235 case -NFS4ERR_BAD_STATEID:
1236 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1237 case -ENOMEM:
1238 err = 0;
1239 goto out;
1da177e4
LT		 1240 }
1241 err = nfs4_handle_exception(server, err, &exception);
1242 } while (exception.retry);
965b5d67 1243out:
1da177e4
LT		 1244 return err;
1245}
1246
cdd4e68b
TM		 1247static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1248{
1249 struct nfs4_opendata *data = calldata;
1250
1251 data->rpc_status = task->tk_status;
1252 if (RPC_ASSASSINATED(task))
1253 return;
26e976a8 1254 if (data->rpc_status == 0) {
cdd4e68b
TM		 1255 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1256 sizeof(data->o_res.stateid.data));
bb22629e 1257 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1258 renew_lease(data->o_res.server, data->timestamp);
3e309914 1259 data->rpc_done = 1;
26e976a8 1260 }
cdd4e68b
TM		 1261}
1262
1263static void nfs4_open_confirm_release(void *calldata)
1264{
1265 struct nfs4_opendata *data = calldata;
1266 struct nfs4_state *state = NULL;
1267
1268 /* If this request hasn't been cancelled, do nothing */
1269 if (data->cancelled == 0)
1270 goto out_free;
1271 /* In case of error, no cleanup! */
3e309914 1272 if (!data->rpc_done)
cdd4e68b 1273 goto out_free;
cdd4e68b 1274 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1275 if (!IS_ERR(state))
dc0b027d 1276 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1277out_free:
c6d00e63 1278 nfs4_opendata_put(data);
cdd4e68b
TM		 1279}
1280
1281static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1282 .rpc_call_done = nfs4_open_confirm_done,
1283 .rpc_release = nfs4_open_confirm_release,
1284};
1285
1286/*
1287 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1288 */
1289static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1290{
1291 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1292 struct rpc_task *task;
5138fde0
TM		 1293 struct rpc_message msg = {
1294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1295 .rpc_argp = &data->c_arg,
1296 .rpc_resp = &data->c_res,
1297 .rpc_cred = data->owner->so_cred,
1298 };
c970aa85
TM		 1299 struct rpc_task_setup task_setup_data = {
1300 .rpc_client = server->client,
5138fde0 1301 .rpc_message = &msg,
c970aa85
TM		 1302 .callback_ops = &nfs4_open_confirm_ops,
1303 .callback_data = data,
101070ca 1304 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1305 .flags = RPC_TASK_ASYNC,
1306 };
1da177e4
LT		 1307 int status;
1308
c6d00e63 1309 kref_get(&data->kref);
3e309914
TM		 1310 data->rpc_done = 0;
1311 data->rpc_status = 0;
5138fde0 1312 data->timestamp = jiffies;
c970aa85 1313 task = rpc_run_task(&task_setup_data);
7a1218a2 1314 if (IS_ERR(task))
cdd4e68b 1315 return PTR_ERR(task);
cdd4e68b
TM		 1316 status = nfs4_wait_for_completion_rpc_task(task);
1317 if (status != 0) {
1318 data->cancelled = 1;
1319 smp_wmb();
1320 } else
1321 status = data->rpc_status;
e6b3c4db 1322 rpc_put_task(task);
1da177e4
LT		 1323 return status;
1324}
1325
24ac23ab 1326static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1327{
24ac23ab
TM		 1328 struct nfs4_opendata *data = calldata;
1329 struct nfs4_state_owner *sp = data->owner;
5138fde0 1330
24ac23ab
TM		 1331 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1332 return;
aac00a8d
TM		 1333 /*
1334 * Check if we still need to send an OPEN call, or if we can use
1335 * a delegation instead.
1336 */
1337 if (data->state != NULL) {
1338 struct nfs_delegation *delegation;
1339
dc0b027d 1340 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1341 goto out_no_action;
aac00a8d
TM		 1342 rcu_read_lock();
1343 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1344 if (delegation != NULL &&
15c831bf 1345 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1346 rcu_read_unlock();
6ee41268 1347 goto out_no_action;
aac00a8d
TM		 1348 }
1349 rcu_read_unlock();
1350 }
24ac23ab 1351 /* Update sequence id. */
9f958ab8 1352 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1353 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1354 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1355 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1356 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1357 }
26e976a8 1358 data->timestamp = jiffies;
035168ab 1359 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1360 &data->o_arg.seq_args,
1361 &data->o_res.seq_res, 1, task))
1362 return;
5138fde0 1363 rpc_call_start(task);
6ee41268
TM		 1364 return;
1365out_no_action:
1366 task->tk_action = NULL;
1367
24ac23ab 1368}
1da177e4 1369
b257957e
AB		 1370static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1371{
1372 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1373 nfs4_open_prepare(task, calldata);
1374}
1375
24ac23ab
TM		 1376static void nfs4_open_done(struct rpc_task *task, void *calldata)
1377{
1378 struct nfs4_opendata *data = calldata;
1da177e4 1379
24ac23ab 1380 data->rpc_status = task->tk_status;
d898528c 1381
d61e612a
TM		 1382 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1383 task->tk_status);
d898528c 1384
24ac23ab
TM		 1385 if (RPC_ASSASSINATED(task))
1386 return;
1387 if (task->tk_status == 0) {
1388 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1389 case S_IFREG:
1390 break;
1391 case S_IFLNK:
24ac23ab 1392 data->rpc_status = -ELOOP;
6f926b5b
TM		 1393 break;
1394 case S_IFDIR:
24ac23ab 1395 data->rpc_status = -EISDIR;
6f926b5b
TM		 1396 break;
1397 default:
24ac23ab 1398 data->rpc_status = -ENOTDIR;
6f926b5b 1399 }
26e976a8 1400 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1401 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1402 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1403 }
3e309914 1404 data->rpc_done = 1;
24ac23ab 1405}
6f926b5b 1406
24ac23ab
TM		 1407static void nfs4_open_release(void *calldata)
1408{
1409 struct nfs4_opendata *data = calldata;
1410 struct nfs4_state *state = NULL;
1411
1412 /* If this request hasn't been cancelled, do nothing */
1413 if (data->cancelled == 0)
1414 goto out_free;
1415 /* In case of error, no cleanup! */
3e309914 1416 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1417 goto out_free;
1418 /* In case we need an open_confirm, no cleanup! */
1419 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1420 goto out_free;
24ac23ab 1421 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1422 if (!IS_ERR(state))
dc0b027d 1423 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1424out_free:
c6d00e63 1425 nfs4_opendata_put(data);
24ac23ab
TM		 1426}
1427
1428static const struct rpc_call_ops nfs4_open_ops = {
1429 .rpc_call_prepare = nfs4_open_prepare,
1430 .rpc_call_done = nfs4_open_done,
1431 .rpc_release = nfs4_open_release,
1432};
1433
b257957e
AB		 1434static const struct rpc_call_ops nfs4_recover_open_ops = {
1435 .rpc_call_prepare = nfs4_recover_open_prepare,
1436 .rpc_call_done = nfs4_open_done,
1437 .rpc_release = nfs4_open_release,
1438};
1439
1440static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1441{
1442 struct inode *dir = data->dir->d_inode;
1443 struct nfs_server *server = NFS_SERVER(dir);
1444 struct nfs_openargs *o_arg = &data->o_arg;
1445 struct nfs_openres *o_res = &data->o_res;
1446 struct rpc_task *task;
5138fde0
TM		 1447 struct rpc_message msg = {
1448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1449 .rpc_argp = o_arg,
1450 .rpc_resp = o_res,
1451 .rpc_cred = data->owner->so_cred,
1452 };
c970aa85
TM		 1453 struct rpc_task_setup task_setup_data = {
1454 .rpc_client = server->client,
5138fde0 1455 .rpc_message = &msg,
c970aa85
TM		 1456 .callback_ops = &nfs4_open_ops,
1457 .callback_data = data,
101070ca 1458 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1459 .flags = RPC_TASK_ASYNC,
1460 };
24ac23ab
TM		 1461 int status;
1462
c6d00e63 1463 kref_get(&data->kref);
3e309914
TM		 1464 data->rpc_done = 0;
1465 data->rpc_status = 0;
2ced46c2 1466 data->cancelled = 0;
b257957e
AB		 1467 if (isrecover)
1468 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1469 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1470 if (IS_ERR(task))
1471 return PTR_ERR(task);
1472 status = nfs4_wait_for_completion_rpc_task(task);
1473 if (status != 0) {
1474 data->cancelled = 1;
1475 smp_wmb();
1476 } else
1477 status = data->rpc_status;
1478 rpc_put_task(task);
1479
1480 return status;
1481}
1482
1483static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1484{
1485 struct inode *dir = data->dir->d_inode;
1486 struct nfs_openres *o_res = &data->o_res;
1487 int status;
1488
1489 status = nfs4_run_open_task(data, 1);
1490 if (status != 0 || !data->rpc_done)
1491 return status;
1492
1493 nfs_refresh_inode(dir, o_res->dir_attr);
1494
1495 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1496 status = _nfs4_proc_open_confirm(data);
1497 if (status != 0)
1498 return status;
1499 }
1500
1501 return status;
1502}
1503
1504/*
1505 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1506 */
1507static int _nfs4_proc_open(struct nfs4_opendata *data)
1508{
1509 struct inode *dir = data->dir->d_inode;
1510 struct nfs_server *server = NFS_SERVER(dir);
1511 struct nfs_openargs *o_arg = &data->o_arg;
1512 struct nfs_openres *o_res = &data->o_res;
1513 int status;
1514
1515 status = nfs4_run_open_task(data, 0);
3e309914 1516 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1517 return status;
1518
56ae19f3
TM		 1519 if (o_arg->open_flags & O_CREAT) {
1520 update_changeattr(dir, &o_res->cinfo);
1521 nfs_post_op_update_inode(dir, o_res->dir_attr);
1522 } else
1523 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1524 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1525 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1526 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1527 status = _nfs4_proc_open_confirm(data);
1da177e4 1528 if (status != 0)
24ac23ab 1529 return status;
1da177e4
LT		 1530 }
1531 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1532 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1533 return 0;
1da177e4
LT		 1534}
1535
10afec90 1536static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1537{
7539bbab 1538 struct nfs_client *clp = server->nfs_client;
a78cb57a 1539 unsigned int loop;
6b30954e 1540 int ret;
58d9714a 1541
a78cb57a 1542 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1543 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1544 if (ret != 0)
a78cb57a 1545 break;
e598d843
TM		 1546 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1547 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1548 break;
58d9714a 1549 nfs4_schedule_state_recovery(clp);
a78cb57a 1550 ret = -EIO;
6b30954e 1551 }
a78cb57a 1552 return ret;
58d9714a
TM		 1553}
1554
1da177e4
LT		 1555/*
1556 * OPEN_EXPIRED:
1557 * reclaim state on the server after a network partition.
1558 * Assumes caller holds the appropriate lock
1559 */
539cd03a 1560static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1561{
e56e0b78 1562 struct nfs4_opendata *opendata;
864472e9 1563 int ret;
1da177e4 1564
6f220ed5
TM		 1565 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1566 if (IS_ERR(opendata))
1567 return PTR_ERR(opendata);
864472e9 1568 ret = nfs4_open_recover(opendata, state);
35d05778 1569 if (ret == -ESTALE)
539cd03a 1570 d_drop(ctx->path.dentry);
c6d00e63 1571 nfs4_opendata_put(opendata);
864472e9 1572 return ret;
1da177e4
LT		 1573}
1574
a9ed2e25 1575static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1576{
539cd03a 1577 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1578 struct nfs4_exception exception = { };
1579 int err;
1580
1581 do {
539cd03a 1582 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1583 switch (err) {
1584 default:
1585 goto out;
1586 case -NFS4ERR_GRACE:
1587 case -NFS4ERR_DELAY:
2c643488 1588 case -EKEYEXPIRED:
a9ed2e25
TM		 1589 nfs4_handle_exception(server, err, &exception);
1590 err = 0;
1591 }
202b50dc 1592 } while (exception.retry);
a9ed2e25 1593out:
202b50dc
TM		 1594 return err;
1595}
1596
1da177e4
LT		 1597static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1598{
1da177e4 1599 struct nfs_open_context *ctx;
864472e9 1600 int ret;
1da177e4 1601
864472e9
TM		 1602 ctx = nfs4_state_find_open_context(state);
1603 if (IS_ERR(ctx))
1604 return PTR_ERR(ctx);
539cd03a 1605 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1606 put_nfs_open_context(ctx);
1607 return ret;
1da177e4
LT		 1608}
1609
aa53ed54
JL		 1610/*
1611 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1612 * fields corresponding to attributes that were used to store the verifier.
1613 * Make sure we clobber those fields in the later setattr call
1614 */
1615static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1616{
1617 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1618 !(sattr->ia_valid & ATTR_ATIME_SET))
1619 sattr->ia_valid |= ATTR_ATIME;
1620
1621 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1622 !(sattr->ia_valid & ATTR_MTIME_SET))
1623 sattr->ia_valid |= ATTR_MTIME;
1624}
1625
1da177e4 1626/*
24ac23ab 1627 * Returns a referenced nfs4_state
1da177e4 1628 */
dc0b027d 1629static 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		 1630{
1631 struct nfs4_state_owner *sp;
1632 struct nfs4_state *state = NULL;
1633 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1634 struct nfs4_opendata *opendata;
aac00a8d 1635 int status;
1da177e4
LT		 1636
1637 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1638 status = -ENOMEM;
1639 if (!(sp = nfs4_get_state_owner(server, cred))) {
1640 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1641 goto out_err;
1642 }
58d9714a
TM		 1643 status = nfs4_recover_expired_lease(server);
1644 if (status != 0)
b4454fe1 1645 goto err_put_state_owner;
aac00a8d 1646 if (path->dentry->d_inode != NULL)
dc0b027d 1647 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1648 status = -ENOMEM;
8535b2be 1649 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1650 if (opendata == NULL)
95d35cb4 1651 goto err_put_state_owner;
1da177e4 1652
aac00a8d
TM		 1653 if (path->dentry->d_inode != NULL)
1654 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1655
24ac23ab 1656 status = _nfs4_proc_open(opendata);
1da177e4 1657 if (status != 0)
c6d00e63 1658 goto err_opendata_put;
1da177e4 1659
24ac23ab 1660 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1661 status = PTR_ERR(state);
1662 if (IS_ERR(state))
c6d00e63 1663 goto err_opendata_put;
0df5dd4a 1664 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1665 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1666
1667 if (opendata->o_arg.open_flags & O_EXCL) {
1668 nfs4_exclusive_attrset(opendata, sattr);
1669
1670 nfs_fattr_init(opendata->o_res.f_attr);
1671 status = nfs4_do_setattr(state->inode, cred,
1672 opendata->o_res.f_attr, sattr,
1673 state);
1674 if (status == 0)
1675 nfs_setattr_update_inode(state->inode, sattr);
1676 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1677 }
c6d00e63 1678 nfs4_opendata_put(opendata);
1da177e4 1679 nfs4_put_state_owner(sp);
1da177e4
LT		 1680 *res = state;
1681 return 0;
c6d00e63
TM		 1682err_opendata_put:
1683 nfs4_opendata_put(opendata);
e56e0b78
TM		 1684err_put_state_owner:
1685 nfs4_put_state_owner(sp);
1da177e4 1686out_err:
1da177e4
LT		 1687 *res = NULL;
1688 return status;
1689}
1690
1691
dc0b027d 1692static 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		 1693{
1694 struct nfs4_exception exception = { };
1695 struct nfs4_state *res;
1696 int status;
1697
1698 do {
dc0b027d 1699 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1700 if (status == 0)
1701 break;
1702 /* NOTE: BAD_SEQID means the server and client disagree about the
1703 * book-keeping w.r.t. state-changing operations
1704 * (OPEN/CLOSE/LOCK/LOCKU...)
1705 * It is actually a sign of a bug on the client or on the server.
1706 *
1707 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1708 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1709 * have unhashed the old state_owner for us, and that we can
1710 * therefore safely retry using a new one. We should still warn
1711 * the user though...
1712 */
1713 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1714 printk(KERN_WARNING "NFS: v4 server %s "
1715 " returned a bad sequence-id error!\n",
1716 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1717 exception.retry = 1;
1718 continue;
1719 }
550f5747
TM		 1720 /*
1721 * BAD_STATEID on OPEN means that the server cancelled our
1722 * state before it received the OPEN_CONFIRM.
1723 * Recover by retrying the request as per the discussion
1724 * on Page 181 of RFC3530.
1725 */
1726 if (status == -NFS4ERR_BAD_STATEID) {
1727 exception.retry = 1;
1728 continue;
1729 }
aac00a8d
TM		 1730 if (status == -EAGAIN) {
1731 /* We must have found a delegation */
1732 exception.retry = 1;
1733 continue;
1734 }
1da177e4
LT		 1735 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1736 status, &exception));
1737 } while (exception.retry);
1738 return res;
1739}
1740
659bfcd6
TM		 1741static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1742 struct nfs_fattr *fattr, struct iattr *sattr,
1743 struct nfs4_state *state)
1da177e4 1744{
3e4f6290 1745 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1746 struct nfs_setattrargs arg = {
3e4f6290 1747 .fh = NFS_FH(inode),
1da177e4
LT		 1748 .iap = sattr,
1749 .server = server,
1750 .bitmask = server->attr_bitmask,
1751 };
1752 struct nfs_setattrres res = {
1753 .fattr = fattr,
1754 .server = server,
1755 };
1756 struct rpc_message msg = {
659bfcd6
TM		 1757 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1758 .rpc_argp = &arg,
1759 .rpc_resp = &res,
1760 .rpc_cred = cred,
1da177e4 1761 };
26e976a8 1762 unsigned long timestamp = jiffies;
65e4308d 1763 int status;
1da177e4 1764
0e574af1 1765 nfs_fattr_init(fattr);
1da177e4 1766
3e4f6290
TM		 1767 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1768 /* Use that stateid */
1769 } else if (state != NULL) {
08e9eac4
TM		 1770 nfs4_copy_stateid(&arg.stateid, state, current->files);
1771 } else
1da177e4
LT		 1772 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1773
cccef3b9 1774 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1775 if (status == 0 && state != NULL)
1776 renew_lease(server, timestamp);
65e4308d 1777 return status;
1da177e4
LT		 1778}
1779
659bfcd6
TM		 1780static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1781 struct nfs_fattr *fattr, struct iattr *sattr,
1782 struct nfs4_state *state)
1da177e4 1783{
3e4f6290 1784 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1785 struct nfs4_exception exception = { };
1786 int err;
1787 do {
1788 err = nfs4_handle_exception(server,
659bfcd6 1789 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1790 &exception);
1791 } while (exception.retry);
1792 return err;
1793}
1794
1795struct nfs4_closedata {
4a35bd41 1796 struct path path;
1da177e4
LT		 1797 struct inode *inode;
1798 struct nfs4_state *state;
1799 struct nfs_closeargs arg;
1800 struct nfs_closeres res;
516a6af6 1801 struct nfs_fattr fattr;
26e976a8 1802 unsigned long timestamp;
1da177e4
LT		 1803};
1804
963d8fe5 1805static void nfs4_free_closedata(void *data)
9512135d 1806{
963d8fe5
TM		 1807 struct nfs4_closedata *calldata = data;
1808 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1809
1810 nfs4_put_open_state(calldata->state);
1811 nfs_free_seqid(calldata->arg.seqid);
9512135d 1812 nfs4_put_state_owner(sp);
31f31db1 1813 path_put(&calldata->path);
9512135d
TM		 1814 kfree(calldata);
1815}
1816
88069f77
TM		 1817static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1818 fmode_t fmode)
1819{
1820 spin_lock(&state->owner->so_lock);
1821 if (!(fmode & FMODE_READ))
1822 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1823 if (!(fmode & FMODE_WRITE))
1824 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1825 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1826 spin_unlock(&state->owner->so_lock);
1827}
1828
963d8fe5 1829static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1830{
963d8fe5 1831 struct nfs4_closedata *calldata = data;
1da177e4 1832 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1833 struct nfs_server *server = NFS_SERVER(calldata->inode);
1834
19ddab06 1835 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1836 if (RPC_ASSASSINATED(task))
1837 return;
1da177e4
LT		 1838 /* hmm. we are done with the inode, and in the process of freeing
1839 * the state_owner. we keep this around to process errors
1840 */
1da177e4
LT		 1841 switch (task->tk_status) {
1842 case 0:
45328c35 1843 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1844 renew_lease(server, calldata->timestamp);
88069f77
TM		 1845 nfs4_close_clear_stateid_flags(state,
1846 calldata->arg.fmode);
1da177e4
LT		 1847 break;
1848 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1849 case -NFS4ERR_OLD_STATEID:
1850 case -NFS4ERR_BAD_STATEID:
1da177e4 1851 case -NFS4ERR_EXPIRED:
dc0b027d 1852 if (calldata->arg.fmode == 0)
9e33bed5 1853 break;
1da177e4 1854 default:
72211dbe
TM		 1855 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1856 rpc_restart_call_prepare(task);
1da177e4 1857 }
72211dbe 1858 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1859 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1860}
1861
4ce70ada 1862static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1863{
4ce70ada 1864 struct nfs4_closedata *calldata = data;
9512135d 1865 struct nfs4_state *state = calldata->state;
88069f77 1866 int call_close = 0;
9512135d 1867
963d8fe5 1868 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1869 return;
003707c7 1870
88069f77
TM		 1871 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1872 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1873 spin_lock(&state->owner->so_lock);
003707c7 1874 /* Calculate the change in open mode */
e7616923 1875 if (state->n_rdwr == 0) {
003707c7 1876 if (state->n_rdonly == 0) {
88069f77
TM		 1877 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1878 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1879 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1880 }
1881 if (state->n_wronly == 0) {
88069f77
TM		 1882 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1883 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1884 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1885 }
e7616923 1886 }
4cecb76f 1887 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1888
1889 if (!call_close) {
963d8fe5
TM		 1890 /* Note: exit _without_ calling nfs4_close_done */
1891 task->tk_action = NULL;
9512135d
TM		 1892 return;
1893 }
88069f77
TM		 1894
1895 if (calldata->arg.fmode == 0)
1896 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1897
516a6af6 1898 nfs_fattr_init(calldata->res.fattr);
26e976a8 1899 calldata->timestamp = jiffies;
035168ab 1900 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1901 &calldata->arg.seq_args, &calldata->res.seq_res,
1902 1, task))
1903 return;
5138fde0 1904 rpc_call_start(task);
1da177e4
LT		 1905}
1906
963d8fe5 1907static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1908 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1909 .rpc_call_done = nfs4_close_done,
1910 .rpc_release = nfs4_free_closedata,
1911};
1912
1da177e4
LT		 1913/*
1914 * It is possible for data to be read/written from a mem-mapped file
1915 * after the sys_close call (which hits the vfs layer as a flush).
1916 * This means that we can't safely call nfsv4 close on a file until
1917 * the inode is cleared. This in turn means that we are not good
1918 * NFSv4 citizens - we do not indicate to the server to update the file's
1919 * share state even when we are done with one of the three share
1920 * stateid's in the inode.
1921 *
1922 * NOTE: Caller must be holding the sp->so_owner semaphore!
1923 */
8535b2be 1924int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 1925{
4a35bd41 1926 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1927 struct nfs4_closedata *calldata;
b39e625b
TM		 1928 struct nfs4_state_owner *sp = state->owner;
1929 struct rpc_task *task;
5138fde0
TM		 1930 struct rpc_message msg = {
1931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1932 .rpc_cred = state->owner->so_cred,
1933 };
c970aa85
TM		 1934 struct rpc_task_setup task_setup_data = {
1935 .rpc_client = server->client,
5138fde0 1936 .rpc_message = &msg,
c970aa85 1937 .callback_ops = &nfs4_close_ops,
101070ca 1938 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1939 .flags = RPC_TASK_ASYNC,
1940 };
9512135d 1941 int status = -ENOMEM;
1da177e4 1942
8535b2be 1943 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 1944 if (calldata == NULL)
9512135d 1945 goto out;
4a35bd41 1946 calldata->inode = state->inode;
1da177e4 1947 calldata->state = state;
4a35bd41 1948 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1949 calldata->arg.stateid = &state->open_stateid;
1da177e4 1950 /* Serialization for the sequence id */
8535b2be 1951 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 1952 if (calldata->arg.seqid == NULL)
1953 goto out_free_calldata;
dc0b027d 1954 calldata->arg.fmode = 0;
a65318bf 1955 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1956 calldata->res.fattr = &calldata->fattr;
c1d51931 1957 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1958 calldata->res.server = server;
5f7dbd5c 1959 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
f6948697
AV		 1960 path_get(path);
1961 calldata->path = *path;
9512135d 1962
5138fde0
TM		 1963 msg.rpc_argp = &calldata->arg,
1964 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1965 task_setup_data.callback_data = calldata;
1966 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1967 if (IS_ERR(task))
1968 return PTR_ERR(task);
a49c3c77
TM		 1969 status = 0;
1970 if (wait)
1971 status = rpc_wait_for_completion_task(task);
b39e625b 1972 rpc_put_task(task);
a49c3c77 1973 return status;
9512135d
TM		 1974out_free_calldata:
1975 kfree(calldata);
1976out:
b39e625b
TM		 1977 nfs4_put_open_state(state);
1978 nfs4_put_state_owner(sp);
9512135d 1979 return status;
1da177e4
LT		 1980}
1981
dc0b027d 1982static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1983{
1984 struct file *filp;
1b45c46c 1985 int ret;
02a913a7 1986
1b45c46c 1987 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1988 if (fmode & FMODE_EXEC) {
af22f94a 1989 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1990 state->owner->so_cred,
1991 nd->intent.open.flags);
1992 if (ret < 0)
1993 goto out_close;
1994 }
4a35bd41 1995 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1996 if (!IS_ERR(filp)) {
1997 struct nfs_open_context *ctx;
cd3758e3 1998 ctx = nfs_file_open_context(filp);
02a913a7 1999 ctx->state = state;
95cf959b
TM		 2000 return 0;
2001 }
1b45c46c
TM		 2002 ret = PTR_ERR(filp);
2003out_close:
dc0b027d 2004 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 2005 return ret;
02a913a7
TM		 2006}
2007
2008struct dentry *
1da177e4
LT		 2009nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
2010{
ad389da7 2011 struct path path = {
4ac91378 2012 .mnt = nd->path.mnt,
ad389da7
TM		 2013 .dentry = dentry,
2014 };
4ac91378 2015 struct dentry *parent;
1da177e4
LT		 2016 struct iattr attr;
2017 struct rpc_cred *cred;
2018 struct nfs4_state *state;
02a913a7 2019 struct dentry *res;
dc0b027d 2020 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2021
2022 if (nd->flags & LOOKUP_CREATE) {
2023 attr.ia_mode = nd->intent.open.create_mode;
2024 attr.ia_valid = ATTR_MODE;
2025 if (!IS_POSIXACL(dir))
ce3b0f8d 2026 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2027 } else {
2028 attr.ia_valid = 0;
2029 BUG_ON(nd->intent.open.flags & O_CREAT);
2030 }
2031
98a8e323 2032 cred = rpc_lookup_cred();
1da177e4 2033 if (IS_ERR(cred))
02a913a7 2034 return (struct dentry *)cred;
565277f6
TM		 2035 parent = dentry->d_parent;
2036 /* Protect against concurrent sillydeletes */
2037 nfs_block_sillyrename(parent);
dc0b027d 2038 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2039 put_rpccred(cred);
02a913a7 2040 if (IS_ERR(state)) {
d75340cc 2041 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2042 d_add(dentry, NULL);
d75340cc
TM		 2043 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2044 }
565277f6 2045 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2046 return (struct dentry *)state;
2047 }
24ac23ab 2048 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2049 if (res != NULL)
deee9369 2050 path.dentry = res;
d75340cc 2051 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2052 nfs_unblock_sillyrename(parent);
dc0b027d 2053 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2054 return res;
1da177e4
LT		 2055}
2056
2057int
02a913a7 2058nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2059{
ad389da7 2060 struct path path = {
4ac91378 2061 .mnt = nd->path.mnt,
ad389da7
TM		 2062 .dentry = dentry,
2063 };
1da177e4
LT		 2064 struct rpc_cred *cred;
2065 struct nfs4_state *state;
dc0b027d 2066 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2067
98a8e323 2068 cred = rpc_lookup_cred();
1da177e4
LT		 2069 if (IS_ERR(cred))
2070 return PTR_ERR(cred);
dc0b027d 2071 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2072 put_rpccred(cred);
02a913a7
TM		 2073 if (IS_ERR(state)) {
2074 switch (PTR_ERR(state)) {
2075 case -EPERM:
2076 case -EACCES:
2077 case -EDQUOT:
2078 case -ENOSPC:
2079 case -EROFS:
04287f97 2080 return PTR_ERR(state);
b87c0adf
CL		 2081 default:
2082 goto out_drop;
02a913a7 2083 }
02a913a7 2084 }
24ac23ab 2085 if (state->inode == dentry->d_inode) {
d75340cc 2086 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2087 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2088 return 1;
2089 }
dc0b027d 2090 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2091out_drop:
2092 d_drop(dentry);
1da177e4
LT		 2093 return 0;
2094}
2095
1185a552 2096static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2097{
2098 if (ctx->state == NULL)
2099 return;
2100 if (is_sync)
2101 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2102 else
2103 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2104}
1da177e4
LT		 2105
2106static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2107{
43652ad5
BH		 2108 struct nfs4_server_caps_arg args = {
2109 .fhandle = fhandle,
2110 };
1da177e4
LT		 2111 struct nfs4_server_caps_res res = {};
2112 struct rpc_message msg = {
2113 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2114 .rpc_argp = &args,
1da177e4
LT		 2115 .rpc_resp = &res,
2116 };
2117 int status;
2118
cccef3b9 2119 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2120 if (status == 0) {
2121 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2122 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2123 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2124 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2125 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2126 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2127 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2128 server->caps |= NFS_CAP_ACLS;
2129 if (res.has_links != 0)
2130 server->caps |= NFS_CAP_HARDLINKS;
2131 if (res.has_symlinks != 0)
2132 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2133 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2134 server->caps |= NFS_CAP_FILEID;
2135 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2136 server->caps |= NFS_CAP_MODE;
2137 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2138 server->caps |= NFS_CAP_NLINK;
2139 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2140 server->caps |= NFS_CAP_OWNER;
2141 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2142 server->caps |= NFS_CAP_OWNER_GROUP;
2143 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2144 server->caps |= NFS_CAP_ATIME;
2145 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2146 server->caps |= NFS_CAP_CTIME;
2147 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2148 server->caps |= NFS_CAP_MTIME;
2149
a65318bf
TM		 2150 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2151 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2152 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2153 server->acl_bitmask = res.acl_bitmask;
2154 }
cccef3b9 2155
1da177e4
LT		 2156 return status;
2157}
2158
55a97593 2159int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2160{
2161 struct nfs4_exception exception = { };
2162 int err;
2163 do {
2164 err = nfs4_handle_exception(server,
2165 _nfs4_server_capabilities(server, fhandle),
2166 &exception);
2167 } while (exception.retry);
2168 return err;
2169}
2170
2171static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2172 struct nfs_fsinfo *info)
2173{
1da177e4
LT		 2174 struct nfs4_lookup_root_arg args = {
2175 .bitmask = nfs4_fattr_bitmap,
2176 };
2177 struct nfs4_lookup_res res = {
2178 .server = server,
0e574af1 2179 .fattr = info->fattr,
1da177e4
LT		 2180 .fh = fhandle,
2181 };
2182 struct rpc_message msg = {
2183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2184 .rpc_argp = &args,
2185 .rpc_resp = &res,
2186 };
008f55d0 2187
0e574af1 2188 nfs_fattr_init(info->fattr);
fccba804 2189 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2190}
2191
2192static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2193 struct nfs_fsinfo *info)
2194{
2195 struct nfs4_exception exception = { };
2196 int err;
2197 do {
2198 err = nfs4_handle_exception(server,
2199 _nfs4_lookup_root(server, fhandle, info),
2200 &exception);
2201 } while (exception.retry);
2202 return err;
2203}
2204
54ceac45
DH		 2205/*
2206 * get the file handle for the "/" directory on the server
2207 */
1da177e4 2208static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2209 struct nfs_fsinfo *info)
1da177e4 2210{
1da177e4
LT		 2211 int status;
2212
1da177e4 2213 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2214 if (status == 0)
2215 status = nfs4_server_capabilities(server, fhandle);
2216 if (status == 0)
2217 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2218 return nfs4_map_errors(status);
1da177e4
LT		 2219}
2220
6b97fd3d
MN		 2221/*
2222 * Get locations and (maybe) other attributes of a referral.
2223 * Note that we'll actually follow the referral later when
2224 * we detect fsid mismatch in inode revalidation
2225 */
56659e99 2226static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2227{
2228 int status = -ENOMEM;
2229 struct page *page = NULL;
2230 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2231
2232 page = alloc_page(GFP_KERNEL);
2233 if (page == NULL)
2234 goto out;
2235 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2236 if (locations == NULL)
2237 goto out;
2238
c228fd3a 2239 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2240 if (status != 0)
2241 goto out;
2242 /* Make sure server returned a different fsid for the referral */
2243 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2244 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2245 status = -EIO;
2246 goto out;
2247 }
2248
2249 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2250 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2251 if (!fattr->mode)
2252 fattr->mode = S_IFDIR;
2253 memset(fhandle, 0, sizeof(struct nfs_fh));
2254out:
2255 if (page)
2256 __free_page(page);
2257 if (locations)
2258 kfree(locations);
2259 return status;
2260}
2261
1da177e4
LT		 2262static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2263{
2264 struct nfs4_getattr_arg args = {
2265 .fh = fhandle,
2266 .bitmask = server->attr_bitmask,
2267 };
2268 struct nfs4_getattr_res res = {
2269 .fattr = fattr,
2270 .server = server,
2271 };
2272 struct rpc_message msg = {
2273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2274 .rpc_argp = &args,
2275 .rpc_resp = &res,
2276 };
2277
0e574af1 2278 nfs_fattr_init(fattr);
cccef3b9 2279 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2280}
2281
2282static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2283{
2284 struct nfs4_exception exception = { };
2285 int err;
2286 do {
2287 err = nfs4_handle_exception(server,
2288 _nfs4_proc_getattr(server, fhandle, fattr),
2289 &exception);
2290 } while (exception.retry);
2291 return err;
2292}
2293
2294/*
2295 * The file is not closed if it is opened due to the a request to change
2296 * the size of the file. The open call will not be needed once the
2297 * VFS layer lookup-intents are implemented.
2298 *
2299 * Close is called when the inode is destroyed.
2300 * If we haven't opened the file for O_WRONLY, we
2301 * need to in the size_change case to obtain a stateid.
2302 *
2303 * Got race?
2304 * Because OPEN is always done by name in nfsv4, it is
2305 * possible that we opened a different file by the same
2306 * name. We can recognize this race condition, but we
2307 * can't do anything about it besides returning an error.
2308 *
2309 * This will be fixed with VFS changes (lookup-intent).
2310 */
2311static int
2312nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2313 struct iattr *sattr)
2314{
08e9eac4 2315 struct inode *inode = dentry->d_inode;
659bfcd6 2316 struct rpc_cred *cred = NULL;
d530838b 2317 struct nfs4_state *state = NULL;
1da177e4
LT		 2318 int status;
2319
0e574af1 2320 nfs_fattr_init(fattr);
1da177e4 2321
d530838b 2322 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2323 if (sattr->ia_valid & ATTR_FILE) {
2324 struct nfs_open_context *ctx;
2325
2326 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2327 if (ctx) {
2328 cred = ctx->cred;
2329 state = ctx->state;
2330 }
659bfcd6 2331 }
08e9eac4 2332
659bfcd6 2333 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2334 if (status == 0)
2335 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2336 return status;
2337}
2338
56659e99
TM		 2339static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2340 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2341 struct nfs_fattr *fattr)
2342{
2343 int status;
2344 struct nfs4_lookup_arg args = {
2345 .bitmask = server->attr_bitmask,
2346 .dir_fh = dirfh,
2347 .name = name,
2348 };
2349 struct nfs4_lookup_res res = {
2350 .server = server,
2351 .fattr = fattr,
2352 .fh = fhandle,
2353 };
2354 struct rpc_message msg = {
2355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2356 .rpc_argp = &args,
2357 .rpc_resp = &res,
2358 };
2359
2360 nfs_fattr_init(fattr);
2361
2362 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2363 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2364 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2365 return status;
2366}
2367
2368static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2369 struct qstr *name, struct nfs_fh *fhandle,
2370 struct nfs_fattr *fattr)
2371{
2372 struct nfs4_exception exception = { };
2373 int err;
2374 do {
4e56e082
TM		 2375 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2376 /* FIXME: !!!! */
2377 if (err == -NFS4ERR_MOVED) {
2378 err = -EREMOTE;
2379 break;
2380 }
2381 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2382 } while (exception.retry);
2383 return err;
2384}
2385
56659e99 2386static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2387 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2388{
4e56e082 2389 int status;
1da177e4
LT		 2390
2391 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2392 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2393 if (status == -NFS4ERR_MOVED)
2394 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2395 dprintk("NFS reply lookup: %d\n", status);
2396 return status;
2397}
2398
2399static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2400{
2401 struct nfs4_exception exception = { };
2402 int err;
2403 do {
2404 err = nfs4_handle_exception(NFS_SERVER(dir),
2405 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2406 &exception);
2407 } while (exception.retry);
2408 return err;
2409}
2410
2411static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2412{
76b32999 2413 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2414 struct nfs4_accessargs args = {
2415 .fh = NFS_FH(inode),
76b32999
TM		 2416 .bitmask = server->attr_bitmask,
2417 };
2418 struct nfs4_accessres res = {
2419 .server = server,
1da177e4 2420 };
1da177e4
LT		 2421 struct rpc_message msg = {
2422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2423 .rpc_argp = &args,
2424 .rpc_resp = &res,
2425 .rpc_cred = entry->cred,
2426 };
2427 int mode = entry->mask;
2428 int status;
2429
2430 /*
2431 * Determine which access bits we want to ask for...
2432 */
2433 if (mode & MAY_READ)
2434 args.access |= NFS4_ACCESS_READ;
2435 if (S_ISDIR(inode->i_mode)) {
2436 if (mode & MAY_WRITE)
2437 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2438 if (mode & MAY_EXEC)
2439 args.access |= NFS4_ACCESS_LOOKUP;
2440 } else {
2441 if (mode & MAY_WRITE)
2442 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2443 if (mode & MAY_EXEC)
2444 args.access |= NFS4_ACCESS_EXECUTE;
2445 }
c407d41a
TM		 2446
2447 res.fattr = nfs_alloc_fattr();
2448 if (res.fattr == NULL)
2449 return -ENOMEM;
2450
cccef3b9 2451 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2452 if (!status) {
2453 entry->mask = 0;
2454 if (res.access & NFS4_ACCESS_READ)
2455 entry->mask |= MAY_READ;
2456 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2457 entry->mask |= MAY_WRITE;
2458 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2459 entry->mask |= MAY_EXEC;
c407d41a 2460 nfs_refresh_inode(inode, res.fattr);
1da177e4 2461 }
c407d41a 2462 nfs_free_fattr(res.fattr);
1da177e4
LT		 2463 return status;
2464}
2465
2466static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2467{
2468 struct nfs4_exception exception = { };
2469 int err;
2470 do {
2471 err = nfs4_handle_exception(NFS_SERVER(inode),
2472 _nfs4_proc_access(inode, entry),
2473 &exception);
2474 } while (exception.retry);
2475 return err;
2476}
2477
2478/*
2479 * TODO: For the time being, we don't try to get any attributes
2480 * along with any of the zero-copy operations READ, READDIR,
2481 * READLINK, WRITE.
2482 *
2483 * In the case of the first three, we want to put the GETATTR
2484 * after the read-type operation -- this is because it is hard
2485 * to predict the length of a GETATTR response in v4, and thus
2486 * align the READ data correctly. This means that the GETATTR
2487 * may end up partially falling into the page cache, and we should
2488 * shift it into the 'tail' of the xdr_buf before processing.
2489 * To do this efficiently, we need to know the total length
2490 * of data received, which doesn't seem to be available outside
2491 * of the RPC layer.
2492 *
2493 * In the case of WRITE, we also want to put the GETATTR after
2494 * the operation -- in this case because we want to make sure
2495 * we get the post-operation mtime and size. This means that
2496 * we can't use xdr_encode_pages() as written: we need a variant
2497 * of it which would leave room in the 'tail' iovec.
2498 *
2499 * Both of these changes to the XDR layer would in fact be quite
2500 * minor, but I decided to leave them for a subsequent patch.
2501 */
2502static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2503 unsigned int pgbase, unsigned int pglen)
2504{
2505 struct nfs4_readlink args = {
2506 .fh = NFS_FH(inode),
2507 .pgbase = pgbase,
2508 .pglen = pglen,
2509 .pages = &page,
2510 };
f50c7000 2511 struct nfs4_readlink_res res;
1da177e4
LT		 2512 struct rpc_message msg = {
2513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2514 .rpc_argp = &args,
f50c7000 2515 .rpc_resp = &res,
1da177e4
LT		 2516 };
2517
cccef3b9 2518 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2519}
2520
2521static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2522 unsigned int pgbase, unsigned int pglen)
2523{
2524 struct nfs4_exception exception = { };
2525 int err;
2526 do {
2527 err = nfs4_handle_exception(NFS_SERVER(inode),
2528 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2529 &exception);
2530 } while (exception.retry);
2531 return err;
2532}
2533
1da177e4
LT		 2534/*
2535 * Got race?
2536 * We will need to arrange for the VFS layer to provide an atomic open.
2537 * Until then, this create/open method is prone to inefficiency and race
2538 * conditions due to the lookup, create, and open VFS calls from sys_open()
2539 * placed on the wire.
2540 *
2541 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2542 * The file will be opened again in the subsequent VFS open call
2543 * (nfs4_proc_file_open).
2544 *
2545 * The open for read will just hang around to be used by any process that
2546 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2547 */
2548
2549static int
2550nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2551 int flags, struct nameidata *nd)
1da177e4 2552{
ad389da7 2553 struct path path = {
4ac91378 2554 .mnt = nd->path.mnt,
ad389da7
TM		 2555 .dentry = dentry,
2556 };
1da177e4
LT		 2557 struct nfs4_state *state;
2558 struct rpc_cred *cred;
dc0b027d 2559 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2560 int status = 0;
2561
98a8e323 2562 cred = rpc_lookup_cred();
1da177e4
LT		 2563 if (IS_ERR(cred)) {
2564 status = PTR_ERR(cred);
2565 goto out;
2566 }
dc0b027d 2567 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2568 d_drop(dentry);
1da177e4
LT		 2569 if (IS_ERR(state)) {
2570 status = PTR_ERR(state);
659bfcd6 2571 goto out_putcred;
1da177e4 2572 }
d4d9cdcb 2573 d_add(dentry, igrab(state->inode));
d75340cc 2574 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
ad389da7 2575 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2576 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2577 else
dc0b027d 2578 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2579out_putcred:
2580 put_rpccred(cred);
1da177e4
LT		 2581out:
2582 return status;
2583}
2584
2585static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2586{
16e42959 2587 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2588 struct nfs_removeargs args = {
1da177e4 2589 .fh = NFS_FH(dir),
4fdc17b2
TM		 2590 .name.len = name->len,
2591 .name.name = name->name,
16e42959
TM		 2592 .bitmask = server->attr_bitmask,
2593 };
4fdc17b2 2594 struct nfs_removeres res = {
16e42959 2595 .server = server,
1da177e4 2596 };
1da177e4 2597 struct rpc_message msg = {
4fdc17b2
TM		 2598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2599 .rpc_argp = &args,
2600 .rpc_resp = &res,
1da177e4 2601 };
d346890b
TM		 2602 int status = -ENOMEM;
2603
2604 res.dir_attr = nfs_alloc_fattr();
2605 if (res.dir_attr == NULL)
2606 goto out;
1da177e4 2607
cccef3b9 2608 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2609 if (status == 0) {
2610 update_changeattr(dir, &res.cinfo);
d346890b 2611 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2612 }
d346890b
TM		 2613 nfs_free_fattr(res.dir_attr);
2614out:
1da177e4
LT		 2615 return status;
2616}
2617
2618static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2619{
2620 struct nfs4_exception exception = { };
2621 int err;
2622 do {
2623 err = nfs4_handle_exception(NFS_SERVER(dir),
2624 _nfs4_proc_remove(dir, name),
2625 &exception);
2626 } while (exception.retry);
2627 return err;
2628}
2629
e4eff1a6 2630static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2631{
e4eff1a6
TM		 2632 struct nfs_server *server = NFS_SERVER(dir);
2633 struct nfs_removeargs *args = msg->rpc_argp;
2634 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2635
a65318bf 2636 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2637 res->server = server;
1da177e4 2638 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2639}
2640
e4eff1a6 2641static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2642{
e4eff1a6
TM		 2643 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2644
472cfbd9 2645 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2646 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2647 return 0;
2648 update_changeattr(dir, &res->cinfo);
d346890b 2649 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2650 return 1;
1da177e4
LT		 2651}
2652
2653static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2654 struct inode *new_dir, struct qstr *new_name)
2655{
6caf2c82 2656 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2657 struct nfs4_rename_arg arg = {
2658 .old_dir = NFS_FH(old_dir),
2659 .new_dir = NFS_FH(new_dir),
2660 .old_name = old_name,
2661 .new_name = new_name,
6caf2c82
TM		 2662 .bitmask = server->attr_bitmask,
2663 };
6caf2c82
TM		 2664 struct nfs4_rename_res res = {
2665 .server = server,
1da177e4 2666 };
1da177e4
LT		 2667 struct rpc_message msg = {
2668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2669 .rpc_argp = &arg,
2670 .rpc_resp = &res,
2671 };
011fff72 2672 int status = -ENOMEM;
1da177e4 2673
011fff72
TM		 2674 res.old_fattr = nfs_alloc_fattr();
2675 res.new_fattr = nfs_alloc_fattr();
2676 if (res.old_fattr == NULL || res.new_fattr == NULL)
2677 goto out;
1da177e4 2678
011fff72 2679 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2680 if (!status) {
2681 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2682 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2683 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2684 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2685 }
011fff72
TM		 2686out:
2687 nfs_free_fattr(res.new_fattr);
2688 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2689 return status;
2690}
2691
2692static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2693 struct inode *new_dir, struct qstr *new_name)
2694{
2695 struct nfs4_exception exception = { };
2696 int err;
2697 do {
2698 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2699 _nfs4_proc_rename(old_dir, old_name,
2700 new_dir, new_name),
2701 &exception);
2702 } while (exception.retry);
2703 return err;
2704}
2705
2706static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2707{
91ba2eee 2708 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2709 struct nfs4_link_arg arg = {
2710 .fh = NFS_FH(inode),
2711 .dir_fh = NFS_FH(dir),
2712 .name = name,
91ba2eee
TM		 2713 .bitmask = server->attr_bitmask,
2714 };
91ba2eee
TM		 2715 struct nfs4_link_res res = {
2716 .server = server,
1da177e4 2717 };
1da177e4
LT		 2718 struct rpc_message msg = {
2719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2720 .rpc_argp = &arg,
91ba2eee 2721 .rpc_resp = &res,
1da177e4 2722 };
136f2627
TM		 2723 int status = -ENOMEM;
2724
2725 res.fattr = nfs_alloc_fattr();
2726 res.dir_attr = nfs_alloc_fattr();
2727 if (res.fattr == NULL || res.dir_attr == NULL)
2728 goto out;
1da177e4 2729
cccef3b9 2730 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2731 if (!status) {
2732 update_changeattr(dir, &res.cinfo);
2733 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2734 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2735 }
136f2627
TM		 2736out:
2737 nfs_free_fattr(res.dir_attr);
2738 nfs_free_fattr(res.fattr);
1da177e4
LT		 2739 return status;
2740}
2741
2742static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2743{
2744 struct nfs4_exception exception = { };
2745 int err;
2746 do {
2747 err = nfs4_handle_exception(NFS_SERVER(inode),
2748 _nfs4_proc_link(inode, dir, name),
2749 &exception);
2750 } while (exception.retry);
2751 return err;
2752}
2753
57dc9a57
TM		 2754struct nfs4_createdata {
2755 struct rpc_message msg;
2756 struct nfs4_create_arg arg;
2757 struct nfs4_create_res res;
2758 struct nfs_fh fh;
2759 struct nfs_fattr fattr;
2760 struct nfs_fattr dir_fattr;
2761};
2762
2763static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2764 struct qstr *name, struct iattr *sattr, u32 ftype)
2765{
2766 struct nfs4_createdata *data;
2767
2768 data = kzalloc(sizeof(*data), GFP_KERNEL);
2769 if (data != NULL) {
2770 struct nfs_server *server = NFS_SERVER(dir);
2771
2772 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2773 data->msg.rpc_argp = &data->arg;
2774 data->msg.rpc_resp = &data->res;
2775 data->arg.dir_fh = NFS_FH(dir);
2776 data->arg.server = server;
2777 data->arg.name = name;
2778 data->arg.attrs = sattr;
2779 data->arg.ftype = ftype;
2780 data->arg.bitmask = server->attr_bitmask;
2781 data->res.server = server;
2782 data->res.fh = &data->fh;
2783 data->res.fattr = &data->fattr;
2784 data->res.dir_fattr = &data->dir_fattr;
2785 nfs_fattr_init(data->res.fattr);
2786 nfs_fattr_init(data->res.dir_fattr);
2787 }
2788 return data;
2789}
2790
2791static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2792{
cccef3b9
AA		 2793 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2794 &data->arg, &data->res, 1);
57dc9a57
TM		 2795 if (status == 0) {
2796 update_changeattr(dir, &data->res.dir_cinfo);
2797 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2798 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2799 }
2800 return status;
2801}
2802
2803static void nfs4_free_createdata(struct nfs4_createdata *data)
2804{
2805 kfree(data);
2806}
2807
4f390c15 2808static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2809 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2810{
57dc9a57
TM		 2811 struct nfs4_createdata *data;
2812 int status = -ENAMETOOLONG;
1da177e4 2813
94a6d753 2814 if (len > NFS4_MAXPATHLEN)
57dc9a57 2815 goto out;
4f390c15 2816
57dc9a57
TM		 2817 status = -ENOMEM;
2818 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2819 if (data == NULL)
2820 goto out;
2821
2822 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2823 data->arg.u.symlink.pages = &page;
2824 data->arg.u.symlink.len = len;
1da177e4 2825
57dc9a57
TM		 2826 status = nfs4_do_create(dir, dentry, data);
2827
2828 nfs4_free_createdata(data);
2829out:
1da177e4
LT		 2830 return status;
2831}
2832
4f390c15 2833static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2834 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2835{
2836 struct nfs4_exception exception = { };
2837 int err;
2838 do {
2839 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2840 _nfs4_proc_symlink(dir, dentry, page,
2841 len, sattr),
1da177e4
LT		 2842 &exception);
2843 } while (exception.retry);
2844 return err;
2845}
2846
2847static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2848 struct iattr *sattr)
2849{
57dc9a57
TM		 2850 struct nfs4_createdata *data;
2851 int status = -ENOMEM;
1da177e4 2852
57dc9a57
TM		 2853 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2854 if (data == NULL)
2855 goto out;
2856
2857 status = nfs4_do_create(dir, dentry, data);
2858
2859 nfs4_free_createdata(data);
2860out:
1da177e4
LT		 2861 return status;
2862}
2863
2864static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2865 struct iattr *sattr)
2866{
2867 struct nfs4_exception exception = { };
2868 int err;
2869 do {
2870 err = nfs4_handle_exception(NFS_SERVER(dir),
2871 _nfs4_proc_mkdir(dir, dentry, sattr),
2872 &exception);
2873 } while (exception.retry);
2874 return err;
2875}
2876
2877static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2878 u64 cookie, struct page *page, unsigned int count, int plus)
2879{
2880 struct inode *dir = dentry->d_inode;
2881 struct nfs4_readdir_arg args = {
2882 .fh = NFS_FH(dir),
2883 .pages = &page,
2884 .pgbase = 0,
2885 .count = count,
96d25e53 2886 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2887 };
2888 struct nfs4_readdir_res res;
2889 struct rpc_message msg = {
2890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2891 .rpc_argp = &args,
2892 .rpc_resp = &res,
2893 .rpc_cred = cred,
2894 };
2895 int status;
2896
3110ff80 2897 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2898 dentry->d_parent->d_name.name,
2899 dentry->d_name.name,
2900 (unsigned long long)cookie);
1da177e4
LT		 2901 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2902 res.pgbase = args.pgbase;
cccef3b9 2903 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2904 if (status == 0)
2905 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2906
2907 nfs_invalidate_atime(dir);
2908
3110ff80 2909 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2910 return status;
2911}
2912
2913static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2914 u64 cookie, struct page *page, unsigned int count, int plus)
2915{
2916 struct nfs4_exception exception = { };
2917 int err;
2918 do {
2919 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2920 _nfs4_proc_readdir(dentry, cred, cookie,
2921 page, count, plus),
2922 &exception);
2923 } while (exception.retry);
2924 return err;
2925}
2926
2927static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2928 struct iattr *sattr, dev_t rdev)
2929{
57dc9a57
TM		 2930 struct nfs4_createdata *data;
2931 int mode = sattr->ia_mode;
2932 int status = -ENOMEM;
1da177e4
LT		 2933
2934 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2935 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2936
2937 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2938 if (data == NULL)
2939 goto out;
2940
1da177e4 2941 if (S_ISFIFO(mode))
57dc9a57 2942 data->arg.ftype = NF4FIFO;
1da177e4 2943 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2944 data->arg.ftype = NF4BLK;
2945 data->arg.u.device.specdata1 = MAJOR(rdev);
2946 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2947 }
2948 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2949 data->arg.ftype = NF4CHR;
2950 data->arg.u.device.specdata1 = MAJOR(rdev);
2951 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2952 }
1da177e4 2953
57dc9a57
TM		 2954 status = nfs4_do_create(dir, dentry, data);
2955
2956 nfs4_free_createdata(data);
2957out:
1da177e4
LT		 2958 return status;
2959}
2960
2961static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2962 struct iattr *sattr, dev_t rdev)
2963{
2964 struct nfs4_exception exception = { };
2965 int err;
2966 do {
2967 err = nfs4_handle_exception(NFS_SERVER(dir),
2968 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2969 &exception);
2970 } while (exception.retry);
2971 return err;
2972}
2973
2974static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2975 struct nfs_fsstat *fsstat)
2976{
2977 struct nfs4_statfs_arg args = {
2978 .fh = fhandle,
2979 .bitmask = server->attr_bitmask,
2980 };
24ad148a
BH		 2981 struct nfs4_statfs_res res = {
2982 .fsstat = fsstat,
2983 };
1da177e4
LT		 2984 struct rpc_message msg = {
2985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2986 .rpc_argp = &args,
24ad148a 2987 .rpc_resp = &res,
1da177e4
LT		 2988 };
2989
0e574af1 2990 nfs_fattr_init(fsstat->fattr);
cccef3b9 2991 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2992}
2993
2994static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2995{
2996 struct nfs4_exception exception = { };
2997 int err;
2998 do {
2999 err = nfs4_handle_exception(server,
3000 _nfs4_proc_statfs(server, fhandle, fsstat),
3001 &exception);
3002 } while (exception.retry);
3003 return err;
3004}
3005
3006static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3007 struct nfs_fsinfo *fsinfo)
3008{
3009 struct nfs4_fsinfo_arg args = {
3010 .fh = fhandle,
3011 .bitmask = server->attr_bitmask,
3012 };
3dda5e43
BH		 3013 struct nfs4_fsinfo_res res = {
3014 .fsinfo = fsinfo,
3015 };
1da177e4
LT		 3016 struct rpc_message msg = {
3017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3018 .rpc_argp = &args,
3dda5e43 3019 .rpc_resp = &res,
1da177e4
LT		 3020 };
3021
cccef3b9 3022 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3023}
3024
3025static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3026{
3027 struct nfs4_exception exception = { };
3028 int err;
3029
3030 do {
3031 err = nfs4_handle_exception(server,
3032 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3033 &exception);
3034 } while (exception.retry);
3035 return err;
3036}
3037
3038static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3039{
0e574af1 3040 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3041 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3042}
3043
3044static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3045 struct nfs_pathconf *pathconf)
3046{
3047 struct nfs4_pathconf_arg args = {
3048 .fh = fhandle,
3049 .bitmask = server->attr_bitmask,
3050 };
d45b2989
BH		 3051 struct nfs4_pathconf_res res = {
3052 .pathconf = pathconf,
3053 };
1da177e4
LT		 3054 struct rpc_message msg = {
3055 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3056 .rpc_argp = &args,
d45b2989 3057 .rpc_resp = &res,
1da177e4
LT		 3058 };
3059
3060 /* None of the pathconf attributes are mandatory to implement */
3061 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3062 memset(pathconf, 0, sizeof(*pathconf));
3063 return 0;
3064 }
3065
0e574af1 3066 nfs_fattr_init(pathconf->fattr);
cccef3b9 3067 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3068}
3069
3070static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3071 struct nfs_pathconf *pathconf)
3072{
3073 struct nfs4_exception exception = { };
3074 int err;
3075
3076 do {
3077 err = nfs4_handle_exception(server,
3078 _nfs4_proc_pathconf(server, fhandle, pathconf),
3079 &exception);
3080 } while (exception.retry);
3081 return err;
3082}
3083
ec06c096 3084static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3085{
ec06c096 3086 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3087
f11c88af
AA		 3088 dprintk("--> %s\n", __func__);
3089
f11c88af
AA		 3090 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3091
9e33bed5 3092 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3093 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3094 return -EAGAIN;
1da177e4 3095 }
8850df99
TM		 3096
3097 nfs_invalidate_atime(data->inode);
1da177e4 3098 if (task->tk_status > 0)
ec06c096
TM		 3099 renew_lease(server, data->timestamp);
3100 return 0;
1da177e4
LT		 3101}
3102
bdc7f021 3103static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3104{
1da177e4 3105 data->timestamp = jiffies;
bdc7f021 3106 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3107}
3108
788e7a89 3109static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3110{
1da177e4
LT		 3111 struct inode *inode = data->inode;
3112
def6ed7e
AA		 3113 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3114 task->tk_status);
3115
9e33bed5 3116 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3117 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3118 return -EAGAIN;
1da177e4 3119 }
4f9838c7 3120 if (task->tk_status >= 0) {
1da177e4 3121 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3122 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3123 }
788e7a89 3124 return 0;
1da177e4
LT		 3125}
3126
bdc7f021 3127static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3128{
bdc7f021
TM		 3129 struct nfs_server *server = NFS_SERVER(data->inode);
3130
a65318bf 3131 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3132 data->res.server = server;
1da177e4
LT		 3133 data->timestamp = jiffies;
3134
bdc7f021 3135 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3136}
3137
788e7a89 3138static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3139{
1da177e4
LT		 3140 struct inode *inode = data->inode;
3141
21d9a851
AA		 3142 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3143 task->tk_status);
9e33bed5 3144 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3145 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3146 return -EAGAIN;
1da177e4 3147 }
9e08a3c5 3148 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3149 return 0;
1da177e4
LT		 3150}
3151
bdc7f021 3152static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3153{
788e7a89 3154 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3155
a65318bf 3156 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3157 data->res.server = server;
bdc7f021 3158 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3159}
3160
9bc4e3ca
CL		 3161struct nfs4_renewdata {
3162 struct nfs_client *client;
3163 unsigned long timestamp;
3164};
3165
1da177e4
LT		 3166/*
3167 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3168 * standalone procedure for queueing an asynchronous RENEW.
3169 */
9bc4e3ca 3170static void nfs4_renew_release(void *calldata)
dc96aef9 3171{
9bc4e3ca
CL		 3172 struct nfs4_renewdata *data = calldata;
3173 struct nfs_client *clp = data->client;
dc96aef9 3174
0851de06
AB		 3175 if (atomic_read(&clp->cl_count) > 1)
3176 nfs4_schedule_state_renewal(clp);
3177 nfs_put_client(clp);
9bc4e3ca 3178 kfree(data);
dc96aef9
AB		 3179}
3180
9bc4e3ca 3181static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3182{
9bc4e3ca
CL		 3183 struct nfs4_renewdata *data = calldata;
3184 struct nfs_client *clp = data->client;
3185 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3186
3187 if (task->tk_status < 0) {
95baa25c
TM		 3188 /* Unless we're shutting down, schedule state recovery! */
3189 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3190 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3191 return;
3192 }
3193 spin_lock(&clp->cl_lock);
3194 if (time_before(clp->cl_last_renewal,timestamp))
3195 clp->cl_last_renewal = timestamp;
3196 spin_unlock(&clp->cl_lock);
3197}
3198
963d8fe5
TM		 3199static const struct rpc_call_ops nfs4_renew_ops = {
3200 .rpc_call_done = nfs4_renew_done,
dc96aef9 3201 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3202};
3203
adfa6f98 3204int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3205{
3206 struct rpc_message msg = {
3207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3208 .rpc_argp = clp,
b4454fe1 3209 .rpc_cred = cred,
1da177e4 3210 };
9bc4e3ca 3211 struct nfs4_renewdata *data;
1da177e4 3212
0851de06
AB		 3213 if (!atomic_inc_not_zero(&clp->cl_count))
3214 return -EIO;
9bc4e3ca
CL		 3215 data = kmalloc(sizeof(*data), GFP_KERNEL);
3216 if (data == NULL)
3217 return -ENOMEM;
3218 data->client = clp;
3219 data->timestamp = jiffies;
1da177e4 3220 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3221 &nfs4_renew_ops, data);
1da177e4
LT		 3222}
3223
adfa6f98 3224int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3225{
3226 struct rpc_message msg = {
3227 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3228 .rpc_argp = clp,
b4454fe1 3229 .rpc_cred = cred,
1da177e4
LT		 3230 };
3231 unsigned long now = jiffies;
3232 int status;
3233
3234 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3235 if (status < 0)
3236 return status;
3237 spin_lock(&clp->cl_lock);
3238 if (time_before(clp->cl_last_renewal,now))
3239 clp->cl_last_renewal = now;
3240 spin_unlock(&clp->cl_lock);
3241 return 0;
3242}
3243
aa1870af
BF		 3244static inline int nfs4_server_supports_acls(struct nfs_server *server)
3245{
3246 return (server->caps & NFS_CAP_ACLS)
3247 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3248 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3249}
3250
3251/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3252 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3253 * the stack.
3254 */
3255#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3256
3257static void buf_to_pages(const void *buf, size_t buflen,
3258 struct page **pages, unsigned int *pgbase)
3259{
3260 const void *p = buf;
3261
3262 *pgbase = offset_in_page(buf);
3263 p -= *pgbase;
3264 while (p < buf + buflen) {
3265 *(pages++) = virt_to_page(p);
3266 p += PAGE_CACHE_SIZE;
3267 }
3268}
3269
e50a1c2e
BF		 3270struct nfs4_cached_acl {
3271 int cached;
3272 size_t len;
3e9d4154 3273 char data[0];
e50a1c2e
BF		 3274};
3275
3276static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3277{
3278 struct nfs_inode *nfsi = NFS_I(inode);
3279
3280 spin_lock(&inode->i_lock);
3281 kfree(nfsi->nfs4_acl);
3282 nfsi->nfs4_acl = acl;
3283 spin_unlock(&inode->i_lock);
3284}
3285
3286static void nfs4_zap_acl_attr(struct inode *inode)
3287{
3288 nfs4_set_cached_acl(inode, NULL);
3289}
3290
3291static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3292{
3293 struct nfs_inode *nfsi = NFS_I(inode);
3294 struct nfs4_cached_acl *acl;
3295 int ret = -ENOENT;
3296
3297 spin_lock(&inode->i_lock);
3298 acl = nfsi->nfs4_acl;
3299 if (acl == NULL)
3300 goto out;
3301 if (buf == NULL) /* user is just asking for length */
3302 goto out_len;
3303 if (acl->cached == 0)
3304 goto out;
3305 ret = -ERANGE; /* see getxattr(2) man page */
3306 if (acl->len > buflen)
3307 goto out;
3308 memcpy(buf, acl->data, acl->len);
3309out_len:
3310 ret = acl->len;
3311out:
3312 spin_unlock(&inode->i_lock);
3313 return ret;
3314}
3315
3316static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3317{
3318 struct nfs4_cached_acl *acl;
3319
3320 if (buf && acl_len <= PAGE_SIZE) {
3321 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3322 if (acl == NULL)
3323 goto out;
3324 acl->cached = 1;
3325 memcpy(acl->data, buf, acl_len);
3326 } else {
3327 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3328 if (acl == NULL)
3329 goto out;
3330 acl->cached = 0;
3331 }
3332 acl->len = acl_len;
3333out:
3334 nfs4_set_cached_acl(inode, acl);
3335}
3336
16b4289c 3337static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3338{
aa1870af
BF		 3339 struct page *pages[NFS4ACL_MAXPAGES];
3340 struct nfs_getaclargs args = {
3341 .fh = NFS_FH(inode),
3342 .acl_pages = pages,
3343 .acl_len = buflen,
3344 };
663c79b3
BH		 3345 struct nfs_getaclres res = {
3346 .acl_len = buflen,
3347 };
e50a1c2e 3348 void *resp_buf;
aa1870af
BF		 3349 struct rpc_message msg = {
3350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3351 .rpc_argp = &args,
663c79b3 3352 .rpc_resp = &res,
aa1870af 3353 };
e50a1c2e 3354 struct page *localpage = NULL;
aa1870af
BF		 3355 int ret;
3356
e50a1c2e
BF		 3357 if (buflen < PAGE_SIZE) {
3358 /* As long as we're doing a round trip to the server anyway,
3359 * let's be prepared for a page of acl data. */
3360 localpage = alloc_page(GFP_KERNEL);
3361 resp_buf = page_address(localpage);
3362 if (localpage == NULL)
3363 return -ENOMEM;
3364 args.acl_pages[0] = localpage;
3365 args.acl_pgbase = 0;
663c79b3 3366 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3367 } else {
3368 resp_buf = buf;
3369 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3370 }
cccef3b9 3371 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3372 if (ret)
3373 goto out_free;
663c79b3
BH		 3374 if (res.acl_len > args.acl_len)
3375 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3376 else
663c79b3 3377 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3378 if (buf) {
3379 ret = -ERANGE;
663c79b3 3380 if (res.acl_len > buflen)
e50a1c2e
BF		 3381 goto out_free;
3382 if (localpage)
663c79b3 3383 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3384 }
663c79b3 3385 ret = res.acl_len;
e50a1c2e
BF		 3386out_free:
3387 if (localpage)
3388 __free_page(localpage);
aa1870af
BF		 3389 return ret;
3390}
3391
16b4289c
TM		 3392static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3393{
3394 struct nfs4_exception exception = { };
3395 ssize_t ret;
3396 do {
3397 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3398 if (ret >= 0)
3399 break;
3400 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3401 } while (exception.retry);
3402 return ret;
3403}
3404
e50a1c2e
BF		 3405static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3406{
3407 struct nfs_server *server = NFS_SERVER(inode);
3408 int ret;
3409
3410 if (!nfs4_server_supports_acls(server))
3411 return -EOPNOTSUPP;
3412 ret = nfs_revalidate_inode(server, inode);
3413 if (ret < 0)
3414 return ret;
3415 ret = nfs4_read_cached_acl(inode, buf, buflen);
3416 if (ret != -ENOENT)
3417 return ret;
3418 return nfs4_get_acl_uncached(inode, buf, buflen);
3419}
3420
16b4289c 3421static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3422{
3423 struct nfs_server *server = NFS_SERVER(inode);
3424 struct page *pages[NFS4ACL_MAXPAGES];
3425 struct nfs_setaclargs arg = {
3426 .fh = NFS_FH(inode),
3427 .acl_pages = pages,
3428 .acl_len = buflen,
3429 };
73c403a9 3430 struct nfs_setaclres res;
4b580ee3
BF		 3431 struct rpc_message msg = {
3432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3433 .rpc_argp = &arg,
73c403a9 3434 .rpc_resp = &res,
4b580ee3
BF		 3435 };
3436 int ret;
3437
3438 if (!nfs4_server_supports_acls(server))
3439 return -EOPNOTSUPP;
642ac549 3440 nfs_inode_return_delegation(inode);
4b580ee3 3441 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3442 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3443 nfs_access_zap_cache(inode);
3444 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3445 return ret;
3446}
3447
16b4289c
TM		 3448static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3449{
3450 struct nfs4_exception exception = { };
3451 int err;
3452 do {
3453 err = nfs4_handle_exception(NFS_SERVER(inode),
3454 __nfs4_proc_set_acl(inode, buf, buflen),
3455 &exception);
3456 } while (exception.retry);
3457 return err;
3458}
3459
1da177e4 3460static int
aa5190d0 3461nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3462{
aa5190d0
TM		 3463 struct nfs_client *clp = server->nfs_client;
3464
3465 if (task->tk_status >= 0)
1da177e4
LT		 3466 return 0;
3467 switch(task->tk_status) {
9e33bed5
TM		 3468 case -NFS4ERR_ADMIN_REVOKED:
3469 case -NFS4ERR_BAD_STATEID:
3470 case -NFS4ERR_OPENMODE:
3471 if (state == NULL)
3472 break;
3473 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3474 goto do_state_recovery;
1da177e4 3475 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3476 if (state == NULL)
3477 break;
3478 nfs4_state_mark_reclaim_reboot(clp, state);
3479 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3480 case -NFS4ERR_EXPIRED:
a2c0b9e2 3481 goto do_state_recovery;
4745e315
AA		 3482#if defined(CONFIG_NFS_V4_1)
3483 case -NFS4ERR_BADSESSION:
3484 case -NFS4ERR_BADSLOT:
3485 case -NFS4ERR_BAD_HIGH_SLOT:
3486 case -NFS4ERR_DEADSESSION:
3487 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3488 case -NFS4ERR_SEQ_FALSE_RETRY:
3489 case -NFS4ERR_SEQ_MISORDERED:
3490 dprintk("%s ERROR %d, Reset session\n", __func__,
3491 task->tk_status);
0b9e2d41 3492 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3493 task->tk_status = 0;
3494 return -EAGAIN;
3495#endif /* CONFIG_NFS_V4_1 */
1da177e4 3496 case -NFS4ERR_DELAY:
aa5190d0 3497 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3498 case -NFS4ERR_GRACE:
2c643488 3499 case -EKEYEXPIRED:
1da177e4
LT		 3500 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3501 task->tk_status = 0;
3502 return -EAGAIN;
3503 case -NFS4ERR_OLD_STATEID:
3504 task->tk_status = 0;
3505 return -EAGAIN;
3506 }
3507 task->tk_status = nfs4_map_errors(task->tk_status);
3508 return 0;
a2c0b9e2
TM		 3509do_state_recovery:
3510 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3511 nfs4_schedule_state_recovery(clp);
3512 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3513 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3514 task->tk_status = 0;
3515 return -EAGAIN;
1da177e4
LT		 3516}
3517
bb8b27e5
TM		 3518int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3519 unsigned short port, struct rpc_cred *cred,
3520 struct nfs4_setclientid_res *res)
1da177e4
LT		 3521{
3522 nfs4_verifier sc_verifier;
3523 struct nfs4_setclientid setclientid = {
3524 .sc_verifier = &sc_verifier,
3525 .sc_prog = program,
3526 };
3527 struct rpc_message msg = {
3528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3529 .rpc_argp = &setclientid,
bb8b27e5 3530 .rpc_resp = res,
286d7d6a 3531 .rpc_cred = cred,
1da177e4 3532 };
bc4785cd 3533 __be32 *p;
1da177e4
LT		 3534 int loop = 0;
3535 int status;
3536
bc4785cd 3537 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3538 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3539 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3540
3541 for(;;) {
3542 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3543 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3544 clp->cl_ipaddr,
3545 rpc_peeraddr2str(clp->cl_rpcclient,
3546 RPC_DISPLAY_ADDR),
69dd716c
TM		 3547 rpc_peeraddr2str(clp->cl_rpcclient,
3548 RPC_DISPLAY_PROTO),
78ea323b 3549 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3550 clp->cl_id_uniquifier);
3551 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3552 sizeof(setclientid.sc_netid),
3553 rpc_peeraddr2str(clp->cl_rpcclient,
3554 RPC_DISPLAY_NETID));
1da177e4 3555 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3556 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3557 clp->cl_ipaddr, port >> 8, port & 255);
3558
3559 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3560 if (status != -NFS4ERR_CLID_INUSE)
3561 break;
3562 if (signalled())
3563 break;
3564 if (loop++ & 1)
3565 ssleep(clp->cl_lease_time + 1);
3566 else
3567 if (++clp->cl_id_uniquifier == 0)
3568 break;
3569 }
3570 return status;
3571}
3572
bb8b27e5
TM		 3573static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3574 struct nfs4_setclientid_res *arg,
3575 struct rpc_cred *cred)
1da177e4
LT		 3576{
3577 struct nfs_fsinfo fsinfo;
3578 struct rpc_message msg = {
3579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3580 .rpc_argp = arg,
1da177e4 3581 .rpc_resp = &fsinfo,
286d7d6a 3582 .rpc_cred = cred,
1da177e4
LT		 3583 };
3584 unsigned long now;
3585 int status;
3586
3587 now = jiffies;
3588 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3589 if (status == 0) {
3590 spin_lock(&clp->cl_lock);
3591 clp->cl_lease_time = fsinfo.lease_time * HZ;
3592 clp->cl_last_renewal = now;
3593 spin_unlock(&clp->cl_lock);
3594 }
3595 return status;
3596}
3597
bb8b27e5
TM		 3598int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3599 struct nfs4_setclientid_res *arg,
3600 struct rpc_cred *cred)
51581f3b 3601{
77e03677 3602 long timeout = 0;
51581f3b
TM		 3603 int err;
3604 do {
bb8b27e5 3605 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3606 switch (err) {
3607 case 0:
3608 return err;
3609 case -NFS4ERR_RESOURCE:
3610 /* The IBM lawyers misread another document! */
3611 case -NFS4ERR_DELAY:
2c643488 3612 case -EKEYEXPIRED:
51581f3b
TM		 3613 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3614 }
3615 } while (err == 0);
3616 return err;
3617}
3618
fe650407
TM		 3619struct nfs4_delegreturndata {
3620 struct nfs4_delegreturnargs args;
fa178f29 3621 struct nfs4_delegreturnres res;
fe650407
TM		 3622 struct nfs_fh fh;
3623 nfs4_stateid stateid;
26e976a8 3624 unsigned long timestamp;
fa178f29 3625 struct nfs_fattr fattr;
fe650407
TM		 3626 int rpc_status;
3627};
3628
fe650407
TM		 3629static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3630{
3631 struct nfs4_delegreturndata *data = calldata;
938e1010 3632
d61e612a
TM		 3633 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3634 task->tk_status);
938e1010 3635
79708861
RL		 3636 switch (task->tk_status) {
3637 case -NFS4ERR_STALE_STATEID:
3638 case -NFS4ERR_EXPIRED:
3639 case 0:
fa178f29 3640 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3641 break;
3642 default:
3643 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3644 -EAGAIN) {
3645 nfs_restart_rpc(task, data->res.server->nfs_client);
3646 return;
3647 }
3648 }
3649 data->rpc_status = task->tk_status;
fe650407
TM		 3650}
3651
3652static void nfs4_delegreturn_release(void *calldata)
3653{
fe650407
TM		 3654 kfree(calldata);
3655}
3656
938e1010
AA		 3657#if defined(CONFIG_NFS_V4_1)
3658static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3659{
3660 struct nfs4_delegreturndata *d_data;
3661
3662 d_data = (struct nfs4_delegreturndata *)data;
3663
035168ab 3664 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3665 &d_data->args.seq_args,
3666 &d_data->res.seq_res, 1, task))
3667 return;
3668 rpc_call_start(task);
3669}
3670#endif /* CONFIG_NFS_V4_1 */
3671
c8d149f3 3672static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3673#if defined(CONFIG_NFS_V4_1)
3674 .rpc_call_prepare = nfs4_delegreturn_prepare,
3675#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3676 .rpc_call_done = nfs4_delegreturn_done,
3677 .rpc_release = nfs4_delegreturn_release,
3678};
3679
e6f81075 3680static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3681{
3682 struct nfs4_delegreturndata *data;
fa178f29 3683 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3684 struct rpc_task *task;
5138fde0
TM		 3685 struct rpc_message msg = {
3686 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3687 .rpc_cred = cred,
3688 };
c970aa85
TM		 3689 struct rpc_task_setup task_setup_data = {
3690 .rpc_client = server->client,
5138fde0 3691 .rpc_message = &msg,
c970aa85
TM		 3692 .callback_ops = &nfs4_delegreturn_ops,
3693 .flags = RPC_TASK_ASYNC,
3694 };
e6f81075 3695 int status = 0;
fe650407 3696
8535b2be 3697 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3698 if (data == NULL)
3699 return -ENOMEM;
3700 data->args.fhandle = &data->fh;
3701 data->args.stateid = &data->stateid;
fa178f29 3702 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3703 nfs_copy_fh(&data->fh, NFS_FH(inode));
3704 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3705 data->res.fattr = &data->fattr;
3706 data->res.server = server;
5f7dbd5c 3707 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3708 nfs_fattr_init(data->res.fattr);
26e976a8 3709 data->timestamp = jiffies;
fe650407
TM		 3710 data->rpc_status = 0;
3711
c970aa85 3712 task_setup_data.callback_data = data;
5138fde0
TM		 3713 msg.rpc_argp = &data->args,
3714 msg.rpc_resp = &data->res,
c970aa85 3715 task = rpc_run_task(&task_setup_data);
7a1218a2 3716 if (IS_ERR(task))
fe650407 3717 return PTR_ERR(task);
e6f81075
TM		 3718 if (!issync)
3719 goto out;
fe650407 3720 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3721 if (status != 0)
3722 goto out;
3723 status = data->rpc_status;
3724 if (status != 0)
3725 goto out;
3726 nfs_refresh_inode(inode, &data->fattr);
3727out:
e6b3c4db 3728 rpc_put_task(task);
fe650407 3729 return status;
1da177e4
LT		 3730}
3731
e6f81075 3732int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3733{
3734 struct nfs_server *server = NFS_SERVER(inode);
3735 struct nfs4_exception exception = { };
3736 int err;
3737 do {
e6f81075 3738 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3739 switch (err) {
3740 case -NFS4ERR_STALE_STATEID:
3741 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3742 case 0:
3743 return 0;
3744 }
3745 err = nfs4_handle_exception(server, err, &exception);
3746 } while (exception.retry);
3747 return err;
3748}
3749
3750#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3751#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3752
3753/*
3754 * sleep, with exponential backoff, and retry the LOCK operation.
3755 */
3756static unsigned long
3757nfs4_set_lock_task_retry(unsigned long timeout)
3758{
150030b7 3759 schedule_timeout_killable(timeout);
1da177e4
LT		 3760 timeout <<= 1;
3761 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3762 return NFS4_LOCK_MAXTIMEOUT;
3763 return timeout;
3764}
3765
1da177e4
LT		 3766static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3767{
3768 struct inode *inode = state->inode;
3769 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3770 struct nfs_client *clp = server->nfs_client;
911d1aaf 3771 struct nfs_lockt_args arg = {
1da177e4 3772 .fh = NFS_FH(inode),
911d1aaf 3773 .fl = request,
1da177e4 3774 };
911d1aaf
TM		 3775 struct nfs_lockt_res res = {
3776 .denied = request,
1da177e4
LT		 3777 };
3778 struct rpc_message msg = {
3779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3780 .rpc_argp = &arg,
3781 .rpc_resp = &res,
3782 .rpc_cred = state->owner->so_cred,
3783 };
1da177e4
LT		 3784 struct nfs4_lock_state *lsp;
3785 int status;
3786
911d1aaf 3787 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3788 status = nfs4_set_lock_state(state, request);
3789 if (status != 0)
3790 goto out;
3791 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3792 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3793 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3794 switch (status) {
3795 case 0:
3796 request->fl_type = F_UNLCK;
3797 break;
3798 case -NFS4ERR_DENIED:
3799 status = 0;
1da177e4 3800 }
70cc6487 3801 request->fl_ops->fl_release_private(request);
8d0a8a9d 3802out:
1da177e4
LT		 3803 return status;
3804}
3805
3806static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3807{
3808 struct nfs4_exception exception = { };
3809 int err;
3810
3811 do {
3812 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3813 _nfs4_proc_getlk(state, cmd, request),
3814 &exception);
3815 } while (exception.retry);
3816 return err;
3817}
3818
3819static int do_vfs_lock(struct file *file, struct file_lock *fl)
3820{
3821 int res = 0;
3822 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3823 case FL_POSIX:
3824 res = posix_lock_file_wait(file, fl);
3825 break;
3826 case FL_FLOCK:
3827 res = flock_lock_file_wait(file, fl);
3828 break;
3829 default:
3830 BUG();
3831 }
1da177e4
LT		 3832 return res;
3833}
3834
faf5f49c 3835struct nfs4_unlockdata {
911d1aaf
TM		 3836 struct nfs_locku_args arg;
3837 struct nfs_locku_res res;
faf5f49c
TM		 3838 struct nfs4_lock_state *lsp;
3839 struct nfs_open_context *ctx;
911d1aaf
TM		 3840 struct file_lock fl;
3841 const struct nfs_server *server;
26e976a8 3842 unsigned long timestamp;
faf5f49c
TM		 3843};
3844
911d1aaf
TM		 3845static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3846 struct nfs_open_context *ctx,
3847 struct nfs4_lock_state *lsp,
3848 struct nfs_seqid *seqid)
3849{
3850 struct nfs4_unlockdata *p;
3851 struct inode *inode = lsp->ls_state->inode;
3852
8535b2be 3853 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3854 if (p == NULL)
3855 return NULL;
3856 p->arg.fh = NFS_FH(inode);
3857 p->arg.fl = &p->fl;
3858 p->arg.seqid = seqid;
c1d51931 3859 p->res.seqid = seqid;
5f7dbd5c 3860 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3861 p->arg.stateid = &lsp->ls_stateid;
3862 p->lsp = lsp;
3863 atomic_inc(&lsp->ls_count);
3864 /* Ensure we don't close file until we're done freeing locks! */
3865 p->ctx = get_nfs_open_context(ctx);
3866 memcpy(&p->fl, fl, sizeof(p->fl));
3867 p->server = NFS_SERVER(inode);
3868 return p;
3869}
3870
06f814a3 3871static void nfs4_locku_release_calldata(void *data)
faf5f49c 3872{
963d8fe5 3873 struct nfs4_unlockdata *calldata = data;
911d1aaf 3874 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3875 nfs4_put_lock_state(calldata->lsp);
3876 put_nfs_open_context(calldata->ctx);
3877 kfree(calldata);
faf5f49c
TM		 3878}
3879
963d8fe5 3880static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3881{
963d8fe5 3882 struct nfs4_unlockdata *calldata = data;
faf5f49c 3883
a893693c
AA		 3884 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3885 task->tk_status);
06f814a3
TM		 3886 if (RPC_ASSASSINATED(task))
3887 return;
faf5f49c
TM		 3888 switch (task->tk_status) {
3889 case 0:
3890 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3891 calldata->res.stateid.data,
faf5f49c 3892 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3893 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3894 break;
9e33bed5
TM		 3895 case -NFS4ERR_BAD_STATEID:
3896 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3897 case -NFS4ERR_STALE_STATEID:
3898 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3899 break;
3900 default:
9e33bed5 3901 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3902 nfs_restart_rpc(task,
d61e612a 3903 calldata->server->nfs_client);
faf5f49c 3904 }
faf5f49c
TM		 3905}
3906
4ce70ada 3907static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3908{
4ce70ada 3909 struct nfs4_unlockdata *calldata = data;
faf5f49c 3910
911d1aaf 3911 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3912 return;
3913 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3914 /* Note: exit _without_ running nfs4_locku_done */
3915 task->tk_action = NULL;
faf5f49c
TM		 3916 return;
3917 }
26e976a8 3918 calldata->timestamp = jiffies;
035168ab 3919 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3920 &calldata->arg.seq_args,
3921 &calldata->res.seq_res, 1, task))
3922 return;
5138fde0 3923 rpc_call_start(task);
faf5f49c
TM		 3924}
3925
963d8fe5 3926static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3927 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3928 .rpc_call_done = nfs4_locku_done,
06f814a3 3929 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3930};
3931
a5d16a4d
TM		 3932static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3933 struct nfs_open_context *ctx,
3934 struct nfs4_lock_state *lsp,
3935 struct nfs_seqid *seqid)
3936{
3937 struct nfs4_unlockdata *data;
5138fde0
TM		 3938 struct rpc_message msg = {
3939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3940 .rpc_cred = ctx->cred,
3941 };
c970aa85
TM		 3942 struct rpc_task_setup task_setup_data = {
3943 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3944 .rpc_message = &msg,
c970aa85 3945 .callback_ops = &nfs4_locku_ops,
101070ca 3946 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3947 .flags = RPC_TASK_ASYNC,
3948 };
a5d16a4d 3949
137d6aca
FF		 3950 /* Ensure this is an unlock - when canceling a lock, the
3951 * canceled lock is passed in, and it won't be an unlock.
3952 */
3953 fl->fl_type = F_UNLCK;
3954
a5d16a4d
TM		 3955 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3956 if (data == NULL) {
3957 nfs_free_seqid(seqid);
3958 return ERR_PTR(-ENOMEM);
3959 }
3960
5138fde0
TM		 3961 msg.rpc_argp = &data->arg,
3962 msg.rpc_resp = &data->res,
c970aa85
TM		 3963 task_setup_data.callback_data = data;
3964 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3965}
3966
faf5f49c
TM		 3967static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3968{
19e03c57 3969 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3970 struct nfs_seqid *seqid;
1da177e4 3971 struct nfs4_lock_state *lsp;
06f814a3
TM		 3972 struct rpc_task *task;
3973 int status = 0;
536ff0f8 3974 unsigned char fl_flags = request->fl_flags;
faf5f49c 3975
8d0a8a9d 3976 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3977 /* Unlock _before_ we do the RPC call */
3978 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3979 down_read(&nfsi->rwsem);
3980 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3981 up_read(&nfsi->rwsem);
9b073574 3982 goto out;
19e03c57
TM		 3983 }
3984 up_read(&nfsi->rwsem);
8d0a8a9d 3985 if (status != 0)
9b073574
TM		 3986 goto out;
3987 /* Is this a delegated lock? */
3988 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3989 goto out;
8d0a8a9d 3990 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 3991 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 3992 status = -ENOMEM;
911d1aaf 3993 if (seqid == NULL)
9b073574 3994 goto out;
cd3758e3 3995 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3996 status = PTR_ERR(task);
3997 if (IS_ERR(task))
9b073574 3998 goto out;
a5d16a4d 3999 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4000 rpc_put_task(task);
9b073574 4001out:
536ff0f8 4002 request->fl_flags = fl_flags;
1da177e4
LT		 4003 return status;
4004}
4005
a5d16a4d
TM		 4006struct nfs4_lockdata {
4007 struct nfs_lock_args arg;
4008 struct nfs_lock_res res;
4009 struct nfs4_lock_state *lsp;
4010 struct nfs_open_context *ctx;
4011 struct file_lock fl;
26e976a8 4012 unsigned long timestamp;
a5d16a4d
TM		 4013 int rpc_status;
4014 int cancelled;
66179efe 4015 struct nfs_server *server;
a5d16a4d
TM		 4016};
4017
4018static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4019 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4020 gfp_t gfp_mask)
1da177e4 4021{
a5d16a4d
TM		 4022 struct nfs4_lockdata *p;
4023 struct inode *inode = lsp->ls_state->inode;
1da177e4 4024 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4025
8535b2be 4026 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4027 if (p == NULL)
4028 return NULL;
4029
4030 p->arg.fh = NFS_FH(inode);
4031 p->arg.fl = &p->fl;
8535b2be 4032 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4033 if (p->arg.open_seqid == NULL)
4034 goto out_free;
8535b2be 4035 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4036 if (p->arg.lock_seqid == NULL)
2f74c0a0 4037 goto out_free_seqid;
a5d16a4d 4038 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4039 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4040 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 4041 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 4042 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 4043 p->lsp = lsp;
66179efe 4044 p->server = server;
a5d16a4d
TM		 4045 atomic_inc(&lsp->ls_count);
4046 p->ctx = get_nfs_open_context(ctx);
4047 memcpy(&p->fl, fl, sizeof(p->fl));
4048 return p;
2f74c0a0
TM		 4049out_free_seqid:
4050 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4051out_free:
4052 kfree(p);
4053 return NULL;
4054}
4055
4056static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4057{
4058 struct nfs4_lockdata *data = calldata;
4059 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4060
3110ff80 4061 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4062 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4063 return;
a5d16a4d
TM		 4064 /* Do we need to do an open_to_lock_owner? */
4065 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4066 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4067 return;
a5d16a4d
TM		 4068 data->arg.open_stateid = &state->stateid;
4069 data->arg.new_lock_owner = 1;
c1d51931 4070 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4071 } else
4072 data->arg.new_lock_owner = 0;
26e976a8 4073 data->timestamp = jiffies;
035168ab
TM		 4074 if (nfs4_setup_sequence(data->server,
4075 &data->arg.seq_args,
66179efe
AA		 4076 &data->res.seq_res, 1, task))
4077 return;
5138fde0 4078 rpc_call_start(task);
3110ff80 4079 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4080}
4081
b257957e
AB		 4082static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4083{
4084 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4085 nfs4_lock_prepare(task, calldata);
4086}
4087
a5d16a4d
TM		 4088static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4089{
4090 struct nfs4_lockdata *data = calldata;
4091
3110ff80 4092 dprintk("%s: begin!\n", __func__);
a5d16a4d 4093
d61e612a
TM		 4094 nfs4_sequence_done(data->server, &data->res.seq_res,
4095 task->tk_status);
66179efe 4096
a5d16a4d
TM		 4097 data->rpc_status = task->tk_status;
4098 if (RPC_ASSASSINATED(task))
4099 goto out;
4100 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4101 if (data->rpc_status == 0)
4102 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4103 else
4104 goto out;
4105 }
4106 if (data->rpc_status == 0) {
4107 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4108 sizeof(data->lsp->ls_stateid.data));
4109 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4110 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4111 }
a5d16a4d 4112out:
3110ff80 4113 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4114}
4115
4116static void nfs4_lock_release(void *calldata)
4117{
4118 struct nfs4_lockdata *data = calldata;
4119
3110ff80 4120 dprintk("%s: begin!\n", __func__);
2f74c0a0 4121 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4122 if (data->cancelled != 0) {
4123 struct rpc_task *task;
4124 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4125 data->arg.lock_seqid);
4126 if (!IS_ERR(task))
e6b3c4db 4127 rpc_put_task(task);
3110ff80 4128 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4129 } else
4130 nfs_free_seqid(data->arg.lock_seqid);
4131 nfs4_put_lock_state(data->lsp);
4132 put_nfs_open_context(data->ctx);
4133 kfree(data);
3110ff80 4134 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4135}
4136
4137static const struct rpc_call_ops nfs4_lock_ops = {
4138 .rpc_call_prepare = nfs4_lock_prepare,
4139 .rpc_call_done = nfs4_lock_done,
4140 .rpc_release = nfs4_lock_release,
4141};
4142
b257957e
AB		 4143static const struct rpc_call_ops nfs4_recover_lock_ops = {
4144 .rpc_call_prepare = nfs4_recover_lock_prepare,
4145 .rpc_call_done = nfs4_lock_done,
4146 .rpc_release = nfs4_lock_release,
4147};
4148
2bee72a6
TM		 4149static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4150{
4151 struct nfs_client *clp = server->nfs_client;
4152 struct nfs4_state *state = lsp->ls_state;
4153
4154 switch (error) {
4155 case -NFS4ERR_ADMIN_REVOKED:
4156 case -NFS4ERR_BAD_STATEID:
4157 case -NFS4ERR_EXPIRED:
4158 if (new_lock_owner != 0 ||
4159 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4160 nfs4_state_mark_reclaim_nograce(clp, state);
4161 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4162 break;
4163 case -NFS4ERR_STALE_STATEID:
4164 if (new_lock_owner != 0 ||
4165 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4166 nfs4_state_mark_reclaim_reboot(clp, state);
4167 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4168 };
4169}
4170
afe6c27c 4171static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4172{
4173 struct nfs4_lockdata *data;
4174 struct rpc_task *task;
5138fde0
TM		 4175 struct rpc_message msg = {
4176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4177 .rpc_cred = state->owner->so_cred,
4178 };
c970aa85
TM		 4179 struct rpc_task_setup task_setup_data = {
4180 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4181 .rpc_message = &msg,
c970aa85 4182 .callback_ops = &nfs4_lock_ops,
101070ca 4183 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4184 .flags = RPC_TASK_ASYNC,
4185 };
a5d16a4d
TM		 4186 int ret;
4187
3110ff80 4188 dprintk("%s: begin!\n", __func__);
cd3758e3 4189 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4190 fl->fl_u.nfs4_fl.owner,
4191 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4192 if (data == NULL)
4193 return -ENOMEM;
4194 if (IS_SETLKW(cmd))
4195 data->arg.block = 1;
b257957e
AB		 4196 if (recovery_type > NFS_LOCK_NEW) {
4197 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4198 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4199 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4200 }
5138fde0
TM		 4201 msg.rpc_argp = &data->arg,
4202 msg.rpc_resp = &data->res,
c970aa85
TM		 4203 task_setup_data.callback_data = data;
4204 task = rpc_run_task(&task_setup_data);
7a1218a2 4205 if (IS_ERR(task))
a5d16a4d 4206 return PTR_ERR(task);
a5d16a4d
TM		 4207 ret = nfs4_wait_for_completion_rpc_task(task);
4208 if (ret == 0) {
4209 ret = data->rpc_status;
2bee72a6
TM		 4210 if (ret)
4211 nfs4_handle_setlk_error(data->server, data->lsp,
4212 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4213 } else
4214 data->cancelled = 1;
e6b3c4db 4215 rpc_put_task(task);
3110ff80 4216 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4217 return ret;
1da177e4
LT		 4218}
4219
4220static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4221{
202b50dc
TM		 4222 struct nfs_server *server = NFS_SERVER(state->inode);
4223 struct nfs4_exception exception = { };
4224 int err;
4225
4226 do {
42a2d13e
TM		 4227 /* Cache the lock if possible... */
4228 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4229 return 0;
afe6c27c 4230 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4231 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4232 break;
4233 nfs4_handle_exception(server, err, &exception);
4234 } while (exception.retry);
4235 return err;
1da177e4
LT		 4236}
4237
4238static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4239{
202b50dc
TM		 4240 struct nfs_server *server = NFS_SERVER(state->inode);
4241 struct nfs4_exception exception = { };
4242 int err;
4243
6bfc93ef
TM		 4244 err = nfs4_set_lock_state(state, request);
4245 if (err != 0)
4246 return err;
202b50dc 4247 do {
42a2d13e
TM		 4248 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4249 return 0;
afe6c27c 4250 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4251 switch (err) {
4252 default:
4253 goto out;
4254 case -NFS4ERR_GRACE:
4255 case -NFS4ERR_DELAY:
2c643488 4256 case -EKEYEXPIRED:
a9ed2e25
TM		 4257 nfs4_handle_exception(server, err, &exception);
4258 err = 0;
4259 }
202b50dc 4260 } while (exception.retry);
a9ed2e25 4261out:
202b50dc 4262 return err;
1da177e4
LT		 4263}
4264
4265static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4266{
19e03c57 4267 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4268 unsigned char fl_flags = request->fl_flags;
8e469ebd 4269 int status = -ENOLCK;
1da177e4 4270
8e469ebd
TM		 4271 if ((fl_flags & FL_POSIX) &&
4272 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4273 goto out;
6bfc93ef 4274 /* Is this a delegated open? */
6bfc93ef
TM		 4275 status = nfs4_set_lock_state(state, request);
4276 if (status != 0)
4277 goto out;
01c3b861
TM		 4278 request->fl_flags |= FL_ACCESS;
4279 status = do_vfs_lock(request->fl_file, request);
4280 if (status < 0)
4281 goto out;
19e03c57 4282 down_read(&nfsi->rwsem);
01c3b861 4283 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4284 /* Yes: cache locks! */
01c3b861 4285 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4286 request->fl_flags = fl_flags & ~FL_SLEEP;
4287 status = do_vfs_lock(request->fl_file, request);
4288 goto out_unlock;
01c3b861 4289 }
afe6c27c 4290 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4291 if (status != 0)
01c3b861 4292 goto out_unlock;
6bfc93ef 4293 /* Note: we always want to sleep here! */
01c3b861 4294 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4295 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4296 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4297out_unlock:
19e03c57 4298 up_read(&nfsi->rwsem);
01c3b861
TM		 4299out:
4300 request->fl_flags = fl_flags;
1da177e4
LT		 4301 return status;
4302}
4303
4304static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4305{
4306 struct nfs4_exception exception = { };
4307 int err;
4308
4309 do {
965b5d67
TM		 4310 err = _nfs4_proc_setlk(state, cmd, request);
4311 if (err == -NFS4ERR_DENIED)
4312 err = -EAGAIN;
1da177e4 4313 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4314 err, &exception);
1da177e4
LT		 4315 } while (exception.retry);
4316 return err;
4317}
4318
4319static int
4320nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4321{
4322 struct nfs_open_context *ctx;
4323 struct nfs4_state *state;
4324 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4325 int status;
4326
4327 /* verify open state */
cd3758e3 4328 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4329 state = ctx->state;
4330
4331 if (request->fl_start < 0 || request->fl_end < 0)
4332 return -EINVAL;
4333
d953126a
TM		 4334 if (IS_GETLK(cmd)) {
4335 if (state != NULL)
4336 return nfs4_proc_getlk(state, F_GETLK, request);
4337 return 0;
4338 }
1da177e4
LT		 4339
4340 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4341 return -EINVAL;
4342
d953126a
TM		 4343 if (request->fl_type == F_UNLCK) {
4344 if (state != NULL)
4345 return nfs4_proc_unlck(state, cmd, request);
4346 return 0;
4347 }
1da177e4 4348
d953126a
TM		 4349 if (state == NULL)
4350 return -ENOLCK;
1da177e4
LT		 4351 do {
4352 status = nfs4_proc_setlk(state, cmd, request);
4353 if ((status != -EAGAIN) || IS_SETLK(cmd))
4354 break;
4355 timeout = nfs4_set_lock_task_retry(timeout);
4356 status = -ERESTARTSYS;
4357 if (signalled())
4358 break;
4359 } while(status < 0);
1da177e4
LT		 4360 return status;
4361}
4362
888e694c
TM		 4363int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4364{
4365 struct nfs_server *server = NFS_SERVER(state->inode);
4366 struct nfs4_exception exception = { };
4367 int err;
4368
4369 err = nfs4_set_lock_state(state, fl);
4370 if (err != 0)
4371 goto out;
4372 do {
afe6c27c 4373 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4374 switch (err) {
4375 default:
4376 printk(KERN_ERR "%s: unhandled error %d.\n",
4377 __func__, err);
4378 case 0:
965b5d67 4379 case -ESTALE:
d5122201
TM		 4380 goto out;
4381 case -NFS4ERR_EXPIRED:
4382 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4383 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4384 case -NFS4ERR_BADSESSION:
4385 case -NFS4ERR_BADSLOT:
4386 case -NFS4ERR_BAD_HIGH_SLOT:
4387 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4388 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4389 nfs4_schedule_state_recovery(server->nfs_client);
4390 goto out;
965b5d67
TM		 4391 case -ERESTARTSYS:
4392 /*
4393 * The show must go on: exit, but mark the
4394 * stateid as needing recovery.
4395 */
4396 case -NFS4ERR_ADMIN_REVOKED:
4397 case -NFS4ERR_BAD_STATEID:
4398 case -NFS4ERR_OPENMODE:
4399 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4400 err = 0;
4401 goto out;
4402 case -ENOMEM:
4403 case -NFS4ERR_DENIED:
4404 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4405 err = 0;
4406 goto out;
d5122201 4407 case -NFS4ERR_DELAY:
2c643488 4408 case -EKEYEXPIRED:
d5122201
TM		 4409 break;
4410 }
888e694c
TM		 4411 err = nfs4_handle_exception(server, err, &exception);
4412 } while (exception.retry);
4413out:
4414 return err;
4415}
6b3b5496 4416
aa1870af
BF		 4417#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4418
6b3b5496
BF		 4419int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4420 size_t buflen, int flags)
4421{
4b580ee3
BF		 4422 struct inode *inode = dentry->d_inode;
4423
4424 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4425 return -EOPNOTSUPP;
4426
4b580ee3 4427 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4428}
4429
4430/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4431 * and that's what we'll do for e.g. user attributes that haven't been set.
4432 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4433 * attributes in kernel-managed attribute namespaces. */
4434ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4435 size_t buflen)
4436{
aa1870af
BF		 4437 struct inode *inode = dentry->d_inode;
4438
4439 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4440 return -EOPNOTSUPP;
4441
4442 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4443}
4444
4445ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4446{
aa1870af 4447 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4448
096455a2
BF		 4449 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4450 return 0;
6b3b5496
BF		 4451 if (buf && buflen < len)
4452 return -ERANGE;
4453 if (buf)
aa1870af
BF		 4454 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4455 return len;
6b3b5496
BF		 4456}
4457
69aaaae1
TM		 4458static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4459{
4460 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4461 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4462 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4463 return;
4464
4465 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4466 NFS_ATTR_FATTR_NLINK;
4467 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4468 fattr->nlink = 2;
4469}
4470
56659e99 4471int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4472 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4473{
4474 struct nfs_server *server = NFS_SERVER(dir);
4475 u32 bitmask[2] = {
361e624f
MN		 4476 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4477 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4478 };
4479 struct nfs4_fs_locations_arg args = {
4480 .dir_fh = NFS_FH(dir),
c228fd3a 4481 .name = name,
683b57b4
TM		 4482 .page = page,
4483 .bitmask = bitmask,
4484 };
22958463
BH		 4485 struct nfs4_fs_locations_res res = {
4486 .fs_locations = fs_locations,
4487 };
683b57b4
TM		 4488 struct rpc_message msg = {
4489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4490 .rpc_argp = &args,
22958463 4491 .rpc_resp = &res,
683b57b4
TM		 4492 };
4493 int status;
4494
3110ff80 4495 dprintk("%s: start\n", __func__);
c228fd3a 4496 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4497 fs_locations->server = server;
830b8e33 4498 fs_locations->nlocations = 0;
cccef3b9 4499 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4500 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4501 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4502 return status;
4503}
4504
557134a3 4505#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4506/*
4507 * nfs4_proc_exchange_id()
4508 *
4509 * Since the clientid has expired, all compounds using sessions
4510 * associated with the stale clientid will be returning
4511 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4512 * be in some phase of session reset.
4513 */
4d643d1d 4514int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4515{
4516 nfs4_verifier verifier;
4517 struct nfs41_exchange_id_args args = {
4518 .client = clp,
4519 .flags = clp->cl_exchange_flags,
4520 };
4521 struct nfs41_exchange_id_res res = {
4522 .client = clp,
4523 };
4524 int status;
4525 struct rpc_message msg = {
4526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4527 .rpc_argp = &args,
4528 .rpc_resp = &res,
4529 .rpc_cred = cred,
4530 };
4531 __be32 *p;
4532
4533 dprintk("--> %s\n", __func__);
4534 BUG_ON(clp == NULL);
a7b72103 4535
7b183d0d
AB		 4536 /* Remove server-only flags */
4537 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4538
99fe60d0
BH		 4539 p = (u32 *)verifier.data;
4540 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4541 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4542 args.verifier = &verifier;
4543
4544 while (1) {
4545 args.id_len = scnprintf(args.id, sizeof(args.id),
4546 "%s/%s %u",
4547 clp->cl_ipaddr,
4548 rpc_peeraddr2str(clp->cl_rpcclient,
4549 RPC_DISPLAY_ADDR),
4550 clp->cl_id_uniquifier);
4551
4552 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4553
180b62a3 4554 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4555 break;
4556
4557 if (signalled())
4558 break;
4559
4560 if (++clp->cl_id_uniquifier == 0)
4561 break;
4562 }
4563
4564 dprintk("<-- %s status= %d\n", __func__, status);
4565 return status;
4566}
4567
2050f0cc
AA		 4568struct nfs4_get_lease_time_data {
4569 struct nfs4_get_lease_time_args *args;
4570 struct nfs4_get_lease_time_res *res;
4571 struct nfs_client *clp;
4572};
4573
4574static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4575 void *calldata)
4576{
4577 int ret;
4578 struct nfs4_get_lease_time_data *data =
4579 (struct nfs4_get_lease_time_data *)calldata;
4580
4581 dprintk("--> %s\n", __func__);
689cf5c1 4582 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4583 /* just setup sequence, do not trigger session recovery
4584 since we're invoked within one */
4585 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4586 &data->args->la_seq_args,
4587 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4588
4589 BUG_ON(ret == -EAGAIN);
4590 rpc_call_start(task);
4591 dprintk("<-- %s\n", __func__);
4592}
4593
4594/*
4595 * Called from nfs4_state_manager thread for session setup, so don't recover
4596 * from sequence operation or clientid errors.
4597 */
4598static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4599{
4600 struct nfs4_get_lease_time_data *data =
4601 (struct nfs4_get_lease_time_data *)calldata;
4602
4603 dprintk("--> %s\n", __func__);
d185a334 4604 nfs41_sequence_done(&data->res->lr_seq_res);
2050f0cc
AA		 4605 switch (task->tk_status) {
4606 case -NFS4ERR_DELAY:
4607 case -NFS4ERR_GRACE:
2c643488 4608 case -EKEYEXPIRED:
2050f0cc
AA		 4609 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4610 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4611 task->tk_status = 0;
0110ee15 4612 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4613 return;
4614 }
2050f0cc
AA		 4615 dprintk("<-- %s\n", __func__);
4616}
4617
4618struct rpc_call_ops nfs4_get_lease_time_ops = {
4619 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4620 .rpc_call_done = nfs4_get_lease_time_done,
4621};
4622
4623int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4624{
4625 struct rpc_task *task;
4626 struct nfs4_get_lease_time_args args;
4627 struct nfs4_get_lease_time_res res = {
4628 .lr_fsinfo = fsinfo,
4629 };
4630 struct nfs4_get_lease_time_data data = {
4631 .args = &args,
4632 .res = &res,
4633 .clp = clp,
4634 };
4635 struct rpc_message msg = {
4636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4637 .rpc_argp = &args,
4638 .rpc_resp = &res,
4639 };
4640 struct rpc_task_setup task_setup = {
4641 .rpc_client = clp->cl_rpcclient,
4642 .rpc_message = &msg,
4643 .callback_ops = &nfs4_get_lease_time_ops,
4644 .callback_data = &data
4645 };
4646 int status;
4647
4648 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4649 dprintk("--> %s\n", __func__);
4650 task = rpc_run_task(&task_setup);
4651
4652 if (IS_ERR(task))
4653 status = PTR_ERR(task);
4654 else {
4655 status = task->tk_status;
4656 rpc_put_task(task);
4657 }
4658 dprintk("<-- %s return %d\n", __func__, status);
4659
4660 return status;
4661}
4662
b73dafa7
RL		 4663/*
4664 * Reset a slot table
4665 */
104aeba4
AA		 4666static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4667 int ivalue)
ac72b7b3 4668{
104aeba4 4669 struct nfs4_slot *new = NULL;
b73dafa7 4670 int i;
ac72b7b3
AA		 4671 int ret = 0;
4672
104aeba4
AA		 4673 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4674 max_reqs, tbl->max_slots);
ac72b7b3 4675
104aeba4
AA		 4676 /* Does the newly negotiated max_reqs match the existing slot table? */
4677 if (max_reqs != tbl->max_slots) {
4678 ret = -ENOMEM;
4679 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4680 GFP_NOFS);
104aeba4
AA		 4681 if (!new)
4682 goto out;
4683 ret = 0;
4684 kfree(tbl->slots);
ac72b7b3
AA		 4685 }
4686 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4687 if (new) {
4688 tbl->slots = new;
4689 tbl->max_slots = max_reqs;
4690 }
4691 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4692 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4693 spin_unlock(&tbl->slot_tbl_lock);
4694 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4695 tbl, tbl->slots, tbl->max_slots);
4696out:
4697 dprintk("<-- %s: return %d\n", __func__, ret);
4698 return ret;
4699}
4700
b73dafa7
RL		 4701/*
4702 * Reset the forechannel and backchannel slot tables
4703 */
4704static int nfs4_reset_slot_tables(struct nfs4_session *session)
4705{
4706 int status;
4707
4708 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4709 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4710 if (status)
4711 return status;
4712
4713 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4714 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4715 return status;
4716}
4717
f8625a6a
RL		 4718/* Destroy the slot table */
4719static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4720{
4721 if (session->fc_slot_table.slots != NULL) {
4722 kfree(session->fc_slot_table.slots);
4723 session->fc_slot_table.slots = NULL;
4724 }
4725 if (session->bc_slot_table.slots != NULL) {
4726 kfree(session->bc_slot_table.slots);
4727 session->bc_slot_table.slots = NULL;
4728 }
4729 return;
4730}
4731
fc931582
AA		 4732/*
4733 * Initialize slot table
4734 */
050047ce
RL		 4735static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4736 int max_slots, int ivalue)
fc931582 4737{
fc931582
AA		 4738 struct nfs4_slot *slot;
4739 int ret = -ENOMEM;
4740
4741 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4742
050047ce 4743 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4744
8535b2be 4745 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4746 if (!slot)
4747 goto out;
fc931582
AA		 4748 ret = 0;
4749
4750 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4751 tbl->max_slots = max_slots;
4752 tbl->slots = slot;
4753 tbl->highest_used_slotid = -1; /* no slot is currently used */
4754 spin_unlock(&tbl->slot_tbl_lock);
4755 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4756 tbl, tbl->slots, tbl->max_slots);
4757out:
4758 dprintk("<-- %s: return %d\n", __func__, ret);
4759 return ret;
fc931582
AA		 4760}
4761
050047ce
RL		 4762/*
4763 * Initialize the forechannel and backchannel tables
4764 */
4765static int nfs4_init_slot_tables(struct nfs4_session *session)
4766{
f26468fb
TM		 4767 struct nfs4_slot_table *tbl;
4768 int status = 0;
050047ce 4769
f26468fb
TM		 4770 tbl = &session->fc_slot_table;
4771 if (tbl->slots == NULL) {
4772 status = nfs4_init_slot_table(tbl,
4773 session->fc_attrs.max_reqs, 1);
4774 if (status)
4775 return status;
4776 }
050047ce 4777
f26468fb
TM		 4778 tbl = &session->bc_slot_table;
4779 if (tbl->slots == NULL) {
4780 status = nfs4_init_slot_table(tbl,
4781 session->bc_attrs.max_reqs, 0);
4782 if (status)
4783 nfs4_destroy_slot_tables(session);
4784 }
f8625a6a
RL		 4785
4786 return status;
557134a3
AA		 4787}
4788
4789struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4790{
4791 struct nfs4_session *session;
4792 struct nfs4_slot_table *tbl;
4793
8535b2be 4794 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4795 if (!session)
4796 return NULL;
76db6d95 4797
ea028ac9 4798 init_completion(&session->complete);
76db6d95 4799
557134a3 4800 tbl = &session->fc_slot_table;
9dfdf404 4801 tbl->highest_used_slotid = -1;
557134a3 4802 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4803 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4804
4805 tbl = &session->bc_slot_table;
9dfdf404 4806 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4807 spin_lock_init(&tbl->slot_tbl_lock);
4808 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4809
1055d76d
TM		 4810 session->session_state = 1<<NFS4_SESSION_INITING;
4811
557134a3
AA		 4812 session->clp = clp;
4813 return session;
4814}
4815
4816void nfs4_destroy_session(struct nfs4_session *session)
4817{
5a0ffe54
AA		 4818 nfs4_proc_destroy_session(session);
4819 dprintk("%s Destroy backchannel for xprt %p\n",
4820 __func__, session->clp->cl_rpcclient->cl_xprt);
4821 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4822 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4823 nfs4_destroy_slot_tables(session);
557134a3
AA		 4824 kfree(session);
4825}
4826
fc931582
AA		 4827/*
4828 * Initialize the values to be used by the client in CREATE_SESSION
4829 * If nfs4_init_session set the fore channel request and response sizes,
4830 * use them.
4831 *
4832 * Set the back channel max_resp_sz_cached to zero to force the client to
4833 * always set csa_cachethis to FALSE because the current implementation
4834 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4835 */
4836static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4837{
4838 struct nfs4_session *session = args->client->cl_session;
4839 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4840 mxresp_sz = session->fc_attrs.max_resp_sz;
4841
4842 if (mxrqst_sz == 0)
4843 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4844 if (mxresp_sz == 0)
4845 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4846 /* Fore channel attributes */
4847 args->fc_attrs.headerpadsz = 0;
4848 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4849 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4850 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4851 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4852
4853 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4854 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4855 __func__,
4856 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4857 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4858
4859 /* Back channel attributes */
4860 args->bc_attrs.headerpadsz = 0;
4861 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4862 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4863 args->bc_attrs.max_resp_sz_cached = 0;
4864 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4865 args->bc_attrs.max_reqs = 1;
4866
4867 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4868 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4869 __func__,
4870 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4871 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4872 args->bc_attrs.max_reqs);
4873}
4874
8d35301d
AA		 4875static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4876{
4877 if (rcvd <= sent)
4878 return 0;
4879 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4880 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4881 return -EINVAL;
4882}
4883
4884#define _verify_fore_channel_attr(_name_) \
4885 _verify_channel_attr("fore", #_name_, \
4886 args->fc_attrs._name_, \
4887 session->fc_attrs._name_)
4888
4889#define _verify_back_channel_attr(_name_) \
4890 _verify_channel_attr("back", #_name_, \
4891 args->bc_attrs._name_, \
4892 session->bc_attrs._name_)
4893
4894/*
4895 * The server is not allowed to increase the fore channel header pad size,
4896 * maximum response size, or maximum number of operations.
4897 *
4898 * The back channel attributes are only negotiatied down: We send what the
4899 * (back channel) server insists upon.
4900 */
4901static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4902 struct nfs4_session *session)
4903{
4904 int ret = 0;
4905
4906 ret |= _verify_fore_channel_attr(headerpadsz);
4907 ret |= _verify_fore_channel_attr(max_resp_sz);
4908 ret |= _verify_fore_channel_attr(max_ops);
4909
4910 ret |= _verify_back_channel_attr(headerpadsz);
4911 ret |= _verify_back_channel_attr(max_rqst_sz);
4912 ret |= _verify_back_channel_attr(max_resp_sz);
4913 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4914 ret |= _verify_back_channel_attr(max_ops);
4915 ret |= _verify_back_channel_attr(max_reqs);
4916
4917 return ret;
4918}
4919
fc931582
AA		 4920static int _nfs4_proc_create_session(struct nfs_client *clp)
4921{
4922 struct nfs4_session *session = clp->cl_session;
4923 struct nfs41_create_session_args args = {
4924 .client = clp,
4925 .cb_program = NFS4_CALLBACK,
4926 };
4927 struct nfs41_create_session_res res = {
4928 .client = clp,
4929 };
4930 struct rpc_message msg = {
4931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4932 .rpc_argp = &args,
4933 .rpc_resp = &res,
4934 };
4935 int status;
4936
4937 nfs4_init_channel_attrs(&args);
0f91421e 4938 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4939
4940 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4941
8d35301d
AA		 4942 if (!status)
4943 /* Verify the session's negotiated channel_attrs values */
4944 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4945 if (!status) {
4946 /* Increment the clientid slot sequence id */
4947 clp->cl_seqid++;
4948 }
4949
4950 return status;
4951}
4952
4953/*
4954 * Issues a CREATE_SESSION operation to the server.
4955 * It is the responsibility of the caller to verify the session is
4956 * expired before calling this routine.
4957 */
f26468fb 4958int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4959{
4960 int status;
4961 unsigned *ptr;
fc931582
AA		 4962 struct nfs4_session *session = clp->cl_session;
4963
4964 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4965
4966 status = _nfs4_proc_create_session(clp);
4967 if (status)
4968 goto out;
4969
f26468fb
TM		 4970 /* Init and reset the fore channel */
4971 status = nfs4_init_slot_tables(session);
4972 dprintk("slot table initialization returned %d\n", status);
4973 if (status)
4974 goto out;
4975 status = nfs4_reset_slot_tables(session);
4976 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4977 if (status)
4978 goto out;
4979
4980 ptr = (unsigned *)&session->sess_id.data[0];
4981 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4982 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4983out:
4984 dprintk("<-- %s\n", __func__);
4985 return status;
4986}
4987
0f3e66c6
AA		 4988/*
4989 * Issue the over-the-wire RPC DESTROY_SESSION.
4990 * The caller must serialize access to this routine.
4991 */
4992int nfs4_proc_destroy_session(struct nfs4_session *session)
4993{
4994 int status = 0;
4995 struct rpc_message msg;
4996
4997 dprintk("--> nfs4_proc_destroy_session\n");
4998
4999 /* session is still being setup */
5000 if (session->clp->cl_cons_state != NFS_CS_READY)
5001 return status;
5002
5003 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5004 msg.rpc_argp = session;
5005 msg.rpc_resp = NULL;
5006 msg.rpc_cred = NULL;
5007 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5008
5009 if (status)
5010 printk(KERN_WARNING
5011 "Got error %d from the server on DESTROY_SESSION. "
5012 "Session has been destroyed regardless...\n", status);
5013
5014 dprintk("<-- nfs4_proc_destroy_session\n");
5015 return status;
5016}
5017
fccba804
TM		 5018int nfs4_init_session(struct nfs_server *server)
5019{
5020 struct nfs_client *clp = server->nfs_client;
2449ea2e 5021 struct nfs4_session *session;
68bf05ef 5022 unsigned int rsize, wsize;
fccba804
TM		 5023 int ret;
5024
5025 if (!nfs4_has_session(clp))
5026 return 0;
5027
1055d76d
TM		 5028 session = clp->cl_session;
5029 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5030 return 0;
5031
68bf05ef
AA		 5032 rsize = server->rsize;
5033 if (rsize == 0)
5034 rsize = NFS_MAX_FILE_IO_SIZE;
5035 wsize = server->wsize;
5036 if (wsize == 0)
5037 wsize = NFS_MAX_FILE_IO_SIZE;
5038
68bf05ef
AA		 5039 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5040 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5041
fccba804
TM		 5042 ret = nfs4_recover_expired_lease(server);
5043 if (!ret)
5044 ret = nfs4_check_client_ready(clp);
5045 return ret;
5046}
5047
fc01cea9
AA		 5048/*
5049 * Renew the cl_session lease.
5050 */
d5f8d3fe
TM		 5051struct nfs4_sequence_data {
5052 struct nfs_client *clp;
5053 struct nfs4_sequence_args args;
5054 struct nfs4_sequence_res res;
5055};
5056
dc96aef9
AB		 5057static void nfs41_sequence_release(void *data)
5058{
d5f8d3fe
TM		 5059 struct nfs4_sequence_data *calldata = data;
5060 struct nfs_client *clp = calldata->clp;
dc96aef9 5061
7135840f
AB		 5062 if (atomic_read(&clp->cl_count) > 1)
5063 nfs4_schedule_state_renewal(clp);
5064 nfs_put_client(clp);
d5f8d3fe 5065 kfree(calldata);
dc96aef9
AB		 5066}
5067
aa5190d0
TM		 5068static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5069{
5070 switch(task->tk_status) {
5071 case -NFS4ERR_DELAY:
5072 case -EKEYEXPIRED:
5073 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5074 return -EAGAIN;
5075 default:
5076 nfs4_schedule_state_recovery(clp);
5077 }
5078 return 0;
5079}
5080
dc96aef9 5081static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5082{
d5f8d3fe
TM		 5083 struct nfs4_sequence_data *calldata = data;
5084 struct nfs_client *clp = calldata->clp;
fc01cea9 5085
d185a334 5086 nfs41_sequence_done(task->tk_msg.rpc_resp);
fc01cea9
AA		 5087
5088 if (task->tk_status < 0) {
5089 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5090 if (atomic_read(&clp->cl_count) == 1)
5091 goto out;
fc01cea9 5092
aa5190d0
TM		 5093 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5094 rpc_restart_call_prepare(task);
fc01cea9
AA		 5095 return;
5096 }
5097 }
fc01cea9 5098 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5099out:
fc01cea9
AA		 5100 dprintk("<-- %s\n", __func__);
5101}
5102
5103static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5104{
d5f8d3fe
TM		 5105 struct nfs4_sequence_data *calldata = data;
5106 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5107 struct nfs4_sequence_args *args;
5108 struct nfs4_sequence_res *res;
5109
fc01cea9
AA		 5110 args = task->tk_msg.rpc_argp;
5111 res = task->tk_msg.rpc_resp;
5112
035168ab 5113 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5114 return;
5115 rpc_call_start(task);
5116}
5117
5118static const struct rpc_call_ops nfs41_sequence_ops = {
5119 .rpc_call_done = nfs41_sequence_call_done,
5120 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5121 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5122};
5123
71ac6da9 5124static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5125{
d5f8d3fe 5126 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5127 struct rpc_message msg = {
5128 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5129 .rpc_cred = cred,
5130 };
71ac6da9
TM		 5131 struct rpc_task_setup task_setup_data = {
5132 .rpc_client = clp->cl_rpcclient,
5133 .rpc_message = &msg,
5134 .callback_ops = &nfs41_sequence_ops,
5135 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5136 };
fc01cea9 5137
7135840f 5138 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5139 return ERR_PTR(-EIO);
d5f8d3fe
TM		 5140 calldata = kmalloc(sizeof(*calldata), GFP_NOFS);
5141 if (calldata == NULL) {
7135840f 5142 nfs_put_client(clp);
71ac6da9 5143 return ERR_PTR(-ENOMEM);
fc01cea9 5144 }
d5f8d3fe
TM		 5145 calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5146 msg.rpc_argp = &calldata->args;
5147 msg.rpc_resp = &calldata->res;
5148 calldata->clp = clp;
71ac6da9 5149 task_setup_data.callback_data = calldata;
fc01cea9 5150
71ac6da9
TM		 5151 return rpc_run_task(&task_setup_data);
5152}
5153
5154static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5155{
5156 struct rpc_task *task;
5157 int ret = 0;
5158
5159 task = _nfs41_proc_sequence(clp, cred);
5160 if (IS_ERR(task))
5161 ret = PTR_ERR(task);
5162 else
5163 rpc_put_task(task);
5164 dprintk("<-- %s status=%d\n", __func__, ret);
5165 return ret;
5166}
5167
5168static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5169{
5170 struct rpc_task *task;
5171 int ret;
5172
5173 task = _nfs41_proc_sequence(clp, cred);
5174 if (IS_ERR(task)) {
5175 ret = PTR_ERR(task);
5176 goto out;
5177 }
5178 ret = rpc_wait_for_completion_task(task);
5179 if (!ret)
5180 ret = task->tk_status;
5181 rpc_put_task(task);
5182out:
5183 dprintk("<-- %s status=%d\n", __func__, ret);
5184 return ret;
fc01cea9
AA		 5185}
5186
fce5c838
RL		 5187struct nfs4_reclaim_complete_data {
5188 struct nfs_client *clp;
5189 struct nfs41_reclaim_complete_args arg;
5190 struct nfs41_reclaim_complete_res res;
5191};
5192
5193static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5194{
5195 struct nfs4_reclaim_complete_data *calldata = data;
5196
b257957e 5197 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5198 if (nfs41_setup_sequence(calldata->clp->cl_session,
5199 &calldata->arg.seq_args,
fce5c838
RL		 5200 &calldata->res.seq_res, 0, task))
5201 return;
5202
5203 rpc_call_start(task);
5204}
5205
aa5190d0
TM		 5206static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5207{
5208 switch(task->tk_status) {
5209 case 0:
5210 case -NFS4ERR_COMPLETE_ALREADY:
5211 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5212 break;
5213 case -NFS4ERR_DELAY:
5214 case -EKEYEXPIRED:
5215 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5216 return -EAGAIN;
5217 default:
5218 nfs4_schedule_state_recovery(clp);
5219 }
5220 return 0;
5221}
5222
fce5c838
RL		 5223static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5224{
5225 struct nfs4_reclaim_complete_data *calldata = data;
5226 struct nfs_client *clp = calldata->clp;
5227 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5228
5229 dprintk("--> %s\n", __func__);
d185a334 5230 nfs41_sequence_done(res);
fce5c838 5231
aa5190d0
TM		 5232 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5233 rpc_restart_call_prepare(task);
5234 return;
5235 }
fce5c838
RL		 5236 dprintk("<-- %s\n", __func__);
5237}
5238
5239static void nfs4_free_reclaim_complete_data(void *data)
5240{
5241 struct nfs4_reclaim_complete_data *calldata = data;
5242
5243 kfree(calldata);
5244}
5245
5246static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5247 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5248 .rpc_call_done = nfs4_reclaim_complete_done,
5249 .rpc_release = nfs4_free_reclaim_complete_data,
5250};
5251
5252/*
5253 * Issue a global reclaim complete.
5254 */
5255static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5256{
5257 struct nfs4_reclaim_complete_data *calldata;
5258 struct rpc_task *task;
5259 struct rpc_message msg = {
5260 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5261 };
5262 struct rpc_task_setup task_setup_data = {
5263 .rpc_client = clp->cl_rpcclient,
5264 .rpc_message = &msg,
5265 .callback_ops = &nfs4_reclaim_complete_call_ops,
5266 .flags = RPC_TASK_ASYNC,
5267 };
5268 int status = -ENOMEM;
5269
5270 dprintk("--> %s\n", __func__);
8535b2be 5271 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5272 if (calldata == NULL)
5273 goto out;
5274 calldata->clp = clp;
5275 calldata->arg.one_fs = 0;
5276 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5277
5278 msg.rpc_argp = &calldata->arg;
5279 msg.rpc_resp = &calldata->res;
5280 task_setup_data.callback_data = calldata;
5281 task = rpc_run_task(&task_setup_data);
acf82b85 5282 if (IS_ERR(task)) {
fce5c838 5283 status = PTR_ERR(task);
acf82b85
DC		 5284 goto out;
5285 }
fce5c838 5286 rpc_put_task(task);
acf82b85 5287 return 0;
fce5c838
RL		 5288out:
5289 dprintk("<-- %s status=%d\n", __func__, status);
5290 return status;
5291}
557134a3
AA		 5292#endif /* CONFIG_NFS_V4_1 */
5293
591d71cb 5294struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5295 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5296 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5297 .recover_open = nfs4_open_reclaim,
5298 .recover_lock = nfs4_lock_reclaim,
591d71cb 5299 .establish_clid = nfs4_init_clientid,
90a16617 5300 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5301};
5302
591d71cb
AA		 5303#if defined(CONFIG_NFS_V4_1)
5304struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5305 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5306 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5307 .recover_open = nfs4_open_reclaim,
5308 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5309 .establish_clid = nfs41_init_clientid,
b4b82607 5310 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5311 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5312};
5313#endif /* CONFIG_NFS_V4_1 */
5314
5315struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5316 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5317 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5318 .recover_open = nfs4_open_expired,
5319 .recover_lock = nfs4_lock_expired,
5320 .establish_clid = nfs4_init_clientid,
90a16617 5321 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5322};
5323
5324#if defined(CONFIG_NFS_V4_1)
5325struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5326 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5327 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5328 .recover_open = nfs4_open_expired,
5329 .recover_lock = nfs4_lock_expired,
4d643d1d 5330 .establish_clid = nfs41_init_clientid,
b4b82607 5331 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5332};
591d71cb 5333#endif /* CONFIG_NFS_V4_1 */
1da177e4 5334
29fba38b
BH		 5335struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5336 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5337 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5338 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5339};
5340
5341#if defined(CONFIG_NFS_V4_1)
5342struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5343 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5344 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5345 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5346};
5347#endif
5348
97dc1359
TM		 5349static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5350 .minor_version = 0,
5351 .call_sync = _nfs4_call_sync,
e047a10c 5352 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5353 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5354 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5355 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5356};
5357
5358#if defined(CONFIG_NFS_V4_1)
5359static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5360 .minor_version = 1,
5361 .call_sync = _nfs4_call_sync_session,
e047a10c 5362 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5363 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5364 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5365 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5366};
5367#endif
5368
97dc1359
TM		 5369const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5370 [0] = &nfs_v4_0_minor_ops,
5371#if defined(CONFIG_NFS_V4_1)
5372 [1] = &nfs_v4_1_minor_ops,
5373#endif
5374};
5375
92e1d5be 5376static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5377 .permission = nfs_permission,
5378 .getattr = nfs_getattr,
5379 .setattr = nfs_setattr,
5380 .getxattr = nfs4_getxattr,
5381 .setxattr = nfs4_setxattr,
5382 .listxattr = nfs4_listxattr,
5383};
5384
509de811 5385const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5386 .version = 4, /* protocol version */
5387 .dentry_ops = &nfs4_dentry_operations,
5388 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5389 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5390 .getroot = nfs4_proc_get_root,
5391 .getattr = nfs4_proc_getattr,
5392 .setattr = nfs4_proc_setattr,
2b3de441 5393 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5394 .lookup = nfs4_proc_lookup,
5395 .access = nfs4_proc_access,
5396 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5397 .create = nfs4_proc_create,
5398 .remove = nfs4_proc_remove,
5399 .unlink_setup = nfs4_proc_unlink_setup,
5400 .unlink_done = nfs4_proc_unlink_done,
5401 .rename = nfs4_proc_rename,
5402 .link = nfs4_proc_link,
5403 .symlink = nfs4_proc_symlink,
5404 .mkdir = nfs4_proc_mkdir,
5405 .rmdir = nfs4_proc_remove,
5406 .readdir = nfs4_proc_readdir,
5407 .mknod = nfs4_proc_mknod,
5408 .statfs = nfs4_proc_statfs,
5409 .fsinfo = nfs4_proc_fsinfo,
5410 .pathconf = nfs4_proc_pathconf,
e9326dca 5411 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5412 .decode_dirent = nfs4_decode_dirent,
5413 .read_setup = nfs4_proc_read_setup,
ec06c096 5414 .read_done = nfs4_read_done,
1da177e4 5415 .write_setup = nfs4_proc_write_setup,
788e7a89 5416 .write_done = nfs4_write_done,
1da177e4 5417 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5418 .commit_done = nfs4_commit_done,
1da177e4 5419 .lock = nfs4_proc_lock,
e50a1c2e 5420 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5421 .close_context = nfs4_close_context,
1da177e4
LT		 5422};
5423
5424/*
5425 * Local variables:
5426 * c-basic-offset: 8
5427 * End:
5428 */
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