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NFSv4.1: Clean up nfs4_setup_sequence
[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
3bfb0fc5 359 if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_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
d61e612a 373static void nfs41_sequence_free_slot(const struct nfs_client *clp,
13615871
AA		 374 struct nfs4_sequence_res *res)
375{
376 struct nfs4_slot_table *tbl;
377
13615871
AA		 378 tbl = &clp->cl_session->fc_slot_table;
379 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 380 /* just wake up the next guy waiting since
381 * we may have not consumed a slot after all */
691daf3b 382 dprintk("%s: No slot\n", __func__);
35dc1d74 383 return;
13615871 384 }
ea028ac9 385
35dc1d74
TM		 386 spin_lock(&tbl->slot_tbl_lock);
387 nfs4_free_slot(tbl, res->sr_slotid);
3bfb0fc5 388 nfs41_check_drain_session_complete(clp->cl_session);
35dc1d74
TM		 389 spin_unlock(&tbl->slot_tbl_lock);
390 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 391}
392
b0df806c
AA		 393static void nfs41_sequence_done(struct nfs_client *clp,
394 struct nfs4_sequence_res *res,
395 int rpc_status)
396{
397 unsigned long timestamp;
398 struct nfs4_slot_table *tbl;
399 struct nfs4_slot *slot;
400
401 /*
402 * sr_status remains 1 if an RPC level error occurred. The server
403 * may or may not have processed the sequence operation..
404 * Proceed as if the server received and processed the sequence
405 * operation.
406 */
407 if (res->sr_status == 1)
408 res->sr_status = NFS_OK;
409
410 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
411 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
412 goto out;
413
691daf3b 414 /* Check the SEQUENCE operation status */
b0df806c 415 if (res->sr_status == 0) {
691daf3b
AA		 416 tbl = &clp->cl_session->fc_slot_table;
417 slot = tbl->slots + res->sr_slotid;
b0df806c
AA		 418 /* Update the slot's sequence and clientid lease timer */
419 ++slot->seq_nr;
420 timestamp = res->sr_renewal_time;
421 spin_lock(&clp->cl_lock);
422 if (time_before(clp->cl_last_renewal, timestamp))
423 clp->cl_last_renewal = timestamp;
424 spin_unlock(&clp->cl_lock);
0629e370 425 /* Check sequence flags */
7135840f
AB		 426 if (atomic_read(&clp->cl_count) > 1)
427 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
b0df806c
AA		 428 }
429out:
430 /* The session may be reset by one of the error handlers. */
431 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
432 nfs41_sequence_free_slot(clp, res);
433}
434
510b8175
BH		 435/*
436 * nfs4_find_slot - efficiently look for a free slot
437 *
438 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
439 * If found, we mark the slot as used, update the highest_used_slotid,
440 * and respectively set up the sequence operation args.
441 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 442 *
443 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 444 */
445static u8
40ead580 446nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 447{
448 int slotid;
449 u8 ret_id = NFS4_MAX_SLOT_TABLE;
450 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
451
510b8175
BH		 452 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
453 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
454 tbl->max_slots);
455 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
456 if (slotid >= tbl->max_slots)
457 goto out;
458 __set_bit(slotid, tbl->used_slots);
459 if (slotid > tbl->highest_used_slotid)
460 tbl->highest_used_slotid = slotid;
461 ret_id = slotid;
462out:
463 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
464 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 465 return ret_id;
466}
467
ce5039c1
AA		 468static int nfs41_setup_sequence(struct nfs4_session *session,
469 struct nfs4_sequence_args *args,
470 struct nfs4_sequence_res *res,
471 int cache_reply,
472 struct rpc_task *task)
473{
fbcd4abc
AA		 474 struct nfs4_slot *slot;
475 struct nfs4_slot_table *tbl;
476 u8 slotid;
477
478 dprintk("--> %s\n", __func__);
ce5039c1
AA		 479 /* slot already allocated? */
480 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
481 return 0;
482
ce5039c1 483 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 484 tbl = &session->fc_slot_table;
485
486 spin_lock(&tbl->slot_tbl_lock);
5601a00d
AB		 487 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
488 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 489 /*
490 * The state manager will wait until the slot table is empty.
491 * Schedule the reset thread
492 */
05f0d236 493 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 494 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 495 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 496 return -EAGAIN;
b069d94a
AA		 497 }
498
689cf5c1
AB		 499 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
500 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
501 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
502 spin_unlock(&tbl->slot_tbl_lock);
503 dprintk("%s enforce FIFO order\n", __func__);
504 return -EAGAIN;
505 }
506
40ead580 507 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 508 if (slotid == NFS4_MAX_SLOT_TABLE) {
509 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
510 spin_unlock(&tbl->slot_tbl_lock);
511 dprintk("<-- %s: no free slots\n", __func__);
512 return -EAGAIN;
513 }
514 spin_unlock(&tbl->slot_tbl_lock);
515
689cf5c1 516 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 517 slot = tbl->slots + slotid;
99fe60d0 518 args->sa_session = session;
fbcd4abc
AA		 519 args->sa_slotid = slotid;
520 args->sa_cache_this = cache_reply;
521
522 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
523
99fe60d0 524 res->sr_session = session;
fbcd4abc
AA		 525 res->sr_slotid = slotid;
526 res->sr_renewal_time = jiffies;
2a6e26cd 527 res->sr_status_flags = 0;
fbcd4abc
AA		 528 /*
529 * sr_status is only set in decode_sequence, and so will remain
530 * set to 1 if an rpc level failure occurs.
531 */
532 res->sr_status = 1;
ce5039c1
AA		 533 return 0;
534}
535
536int nfs4_setup_sequence(struct nfs_client *clp,
537 struct nfs4_sequence_args *args,
538 struct nfs4_sequence_res *res,
539 int cache_reply,
540 struct rpc_task *task)
541{
542 int ret = 0;
543
544 dprintk("--> %s clp %p session %p sr_slotid %d\n",
545 __func__, clp, clp->cl_session, res->sr_slotid);
546
547 if (!nfs4_has_session(clp))
548 goto out;
549 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
550 task);
ce5039c1
AA		 551out:
552 dprintk("<-- %s status=%d\n", __func__, ret);
553 return ret;
554}
555
556struct nfs41_call_sync_data {
557 struct nfs_client *clp;
558 struct nfs4_sequence_args *seq_args;
559 struct nfs4_sequence_res *seq_res;
560 int cache_reply;
561};
562
563static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
564{
565 struct nfs41_call_sync_data *data = calldata;
566
567 dprintk("--> %s data->clp->cl_session %p\n", __func__,
568 data->clp->cl_session);
569 if (nfs4_setup_sequence(data->clp, data->seq_args,
570 data->seq_res, data->cache_reply, task))
571 return;
572 rpc_call_start(task);
573}
574
b257957e
AB		 575static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
576{
577 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
578 nfs41_call_sync_prepare(task, calldata);
579}
580
69ab40c4
AA		 581static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
582{
583 struct nfs41_call_sync_data *data = calldata;
584
585 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
69ab40c4
AA		 586}
587
ce5039c1
AA		 588struct rpc_call_ops nfs41_call_sync_ops = {
589 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 590 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 591};
592
b257957e
AB		 593struct rpc_call_ops nfs41_call_priv_sync_ops = {
594 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
595 .rpc_call_done = nfs41_call_sync_done,
596};
597
ce5039c1
AA		 598static int nfs4_call_sync_sequence(struct nfs_client *clp,
599 struct rpc_clnt *clnt,
600 struct rpc_message *msg,
601 struct nfs4_sequence_args *args,
602 struct nfs4_sequence_res *res,
b257957e
AB		 603 int cache_reply,
604 int privileged)
ce5039c1
AA		 605{
606 int ret;
607 struct rpc_task *task;
608 struct nfs41_call_sync_data data = {
609 .clp = clp,
610 .seq_args = args,
611 .seq_res = res,
612 .cache_reply = cache_reply,
613 };
614 struct rpc_task_setup task_setup = {
615 .rpc_client = clnt,
616 .rpc_message = msg,
617 .callback_ops = &nfs41_call_sync_ops,
618 .callback_data = &data
619 };
620
621 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 622 if (privileged)
623 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 624 task = rpc_run_task(&task_setup);
625 if (IS_ERR(task))
626 ret = PTR_ERR(task);
627 else {
628 ret = task->tk_status;
629 rpc_put_task(task);
630 }
631 return ret;
632}
633
cccef3b9
AA		 634int _nfs4_call_sync_session(struct nfs_server *server,
635 struct rpc_message *msg,
636 struct nfs4_sequence_args *args,
637 struct nfs4_sequence_res *res,
638 int cache_reply)
639{
ce5039c1 640 return nfs4_call_sync_sequence(server->nfs_client, server->client,
b257957e 641 msg, args, res, cache_reply, 0);
cccef3b9
AA		 642}
643
644#endif /* CONFIG_NFS_V4_1 */
645
646int _nfs4_call_sync(struct nfs_server *server,
647 struct rpc_message *msg,
648 struct nfs4_sequence_args *args,
649 struct nfs4_sequence_res *res,
650 int cache_reply)
651{
f3752975 652 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 653 return rpc_call_sync(server->client, msg, 0);
654}
655
656#define nfs4_call_sync(server, msg, args, res, cache_reply) \
657 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
658 &(res)->seq_res, (cache_reply))
659
b0df806c
AA		 660static void nfs4_sequence_done(const struct nfs_server *server,
661 struct nfs4_sequence_res *res, int rpc_status)
662{
663#ifdef CONFIG_NFS_V4_1
664 if (nfs4_has_session(server->nfs_client))
665 nfs41_sequence_done(server->nfs_client, res, rpc_status);
666#endif /* CONFIG_NFS_V4_1 */
667}
668
38478b24 669static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 670{
38478b24 671 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 672
38478b24 673 spin_lock(&dir->i_lock);
40d24704
TM		 674 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
675 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 676 nfs_force_lookup_revalidate(dir);
40d24704 677 nfsi->change_attr = cinfo->after;
38478b24 678 spin_unlock(&dir->i_lock);
1da177e4
LT		 679}
680
e56e0b78 681struct nfs4_opendata {
c6d00e63 682 struct kref kref;
e56e0b78
TM		 683 struct nfs_openargs o_arg;
684 struct nfs_openres o_res;
cdd4e68b
TM		 685 struct nfs_open_confirmargs c_arg;
686 struct nfs_open_confirmres c_res;
e56e0b78
TM		 687 struct nfs_fattr f_attr;
688 struct nfs_fattr dir_attr;
ad389da7 689 struct path path;
e56e0b78
TM		 690 struct dentry *dir;
691 struct nfs4_state_owner *owner;
aac00a8d 692 struct nfs4_state *state;
e56e0b78 693 struct iattr attrs;
26e976a8 694 unsigned long timestamp;
3e309914 695 unsigned int rpc_done : 1;
24ac23ab
TM		 696 int rpc_status;
697 int cancelled;
e56e0b78
TM		 698};
699
2ced46c2
TM		 700
701static void nfs4_init_opendata_res(struct nfs4_opendata *p)
702{
703 p->o_res.f_attr = &p->f_attr;
704 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 705 p->o_res.seqid = p->o_arg.seqid;
706 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 707 p->o_res.server = p->o_arg.server;
708 nfs_fattr_init(&p->f_attr);
709 nfs_fattr_init(&p->dir_attr);
578e4585 710 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 711}
712
ad389da7 713static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 714 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 715 const struct iattr *attrs,
716 gfp_t gfp_mask)
e56e0b78 717{
ad389da7 718 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 719 struct inode *dir = parent->d_inode;
720 struct nfs_server *server = NFS_SERVER(dir);
721 struct nfs4_opendata *p;
722
8535b2be 723 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 724 if (p == NULL)
725 goto err;
8535b2be 726 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 727 if (p->o_arg.seqid == NULL)
728 goto err_free;
f6948697
AV		 729 path_get(path);
730 p->path = *path;
e56e0b78
TM		 731 p->dir = parent;
732 p->owner = sp;
733 atomic_inc(&sp->so_count);
734 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 735 p->o_arg.open_flags = flags;
736 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 737 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 738 p->o_arg.id = sp->so_owner_id.id;
ad389da7 739 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 740 p->o_arg.server = server;
741 p->o_arg.bitmask = server->attr_bitmask;
742 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78 743 if (flags & O_EXCL) {
4882ef72
AB		 744 if (nfs4_has_persistent_session(server->nfs_client)) {
745 /* GUARDED */
746 p->o_arg.u.attrs = &p->attrs;
747 memcpy(&p->attrs, attrs, sizeof(p->attrs));
748 } else { /* EXCLUSIVE4_1 */
749 u32 *s = (u32 *) p->o_arg.u.verifier.data;
750 s[0] = jiffies;
751 s[1] = current->pid;
752 }
e56e0b78
TM		 753 } else if (flags & O_CREAT) {
754 p->o_arg.u.attrs = &p->attrs;
755 memcpy(&p->attrs, attrs, sizeof(p->attrs));
756 }
cdd4e68b
TM		 757 p->c_arg.fh = &p->o_res.fh;
758 p->c_arg.stateid = &p->o_res.stateid;
759 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 760 nfs4_init_opendata_res(p);
c6d00e63 761 kref_init(&p->kref);
e56e0b78
TM		 762 return p;
763err_free:
764 kfree(p);
765err:
766 dput(parent);
767 return NULL;
768}
769
c6d00e63 770static void nfs4_opendata_free(struct kref *kref)
e56e0b78 771{
c6d00e63
TM		 772 struct nfs4_opendata *p = container_of(kref,
773 struct nfs4_opendata, kref);
774
775 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 776 if (p->state != NULL)
777 nfs4_put_open_state(p->state);
c6d00e63
TM		 778 nfs4_put_state_owner(p->owner);
779 dput(p->dir);
31f31db1 780 path_put(&p->path);
c6d00e63
TM		 781 kfree(p);
782}
783
784static void nfs4_opendata_put(struct nfs4_opendata *p)
785{
786 if (p != NULL)
787 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 788}
789
06f814a3
TM		 790static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
791{
06f814a3
TM		 792 int ret;
793
06f814a3 794 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 795 return ret;
796}
797
dc0b027d 798static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 799{
800 int ret = 0;
dc0b027d
TM		 801
802 if (open_mode & O_EXCL)
803 goto out;
804 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 805 case FMODE_READ:
88069f77
TM		 806 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
807 && state->n_rdonly != 0;
6ee41268
TM		 808 break;
809 case FMODE_WRITE:
88069f77
TM		 810 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
811 && state->n_wronly != 0;
6ee41268
TM		 812 break;
813 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 814 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
815 && state->n_rdwr != 0;
6ee41268 816 }
dc0b027d 817out:
6ee41268
TM		 818 return ret;
819}
820
dc0b027d 821static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 822{
dc0b027d 823 if ((delegation->type & fmode) != fmode)
aac00a8d 824 return 0;
15c831bf 825 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 826 return 0;
b7391f44 827 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 828 return 1;
829}
830
dc0b027d 831static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 832{
dc0b027d 833 switch (fmode) {
e7616923
TM		 834 case FMODE_WRITE:
835 state->n_wronly++;
836 break;
837 case FMODE_READ:
838 state->n_rdonly++;
839 break;
840 case FMODE_READ|FMODE_WRITE:
841 state->n_rdwr++;
842 }
dc0b027d 843 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 844}
845
dc0b027d 846static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 847{
848 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
849 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
850 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 851 switch (fmode) {
003707c7
TM		 852 case FMODE_READ:
853 set_bit(NFS_O_RDONLY_STATE, &state->flags);
854 break;
855 case FMODE_WRITE:
856 set_bit(NFS_O_WRONLY_STATE, &state->flags);
857 break;
858 case FMODE_READ|FMODE_WRITE:
859 set_bit(NFS_O_RDWR_STATE, &state->flags);
860 }
e7616923
TM		 861}
862
dc0b027d 863static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 864{
8bda4e4c 865 write_seqlock(&state->seqlock);
dc0b027d 866 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 867 write_sequnlock(&state->seqlock);
003707c7
TM		 868}
869
dc0b027d 870static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 871{
8bda4e4c
TM		 872 /*
873 * Protect the call to nfs4_state_set_mode_locked and
874 * serialise the stateid update
875 */
876 write_seqlock(&state->seqlock);
003707c7
TM		 877 if (deleg_stateid != NULL) {
878 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
879 set_bit(NFS_DELEGATED_STATE, &state->flags);
880 }
881 if (open_stateid != NULL)
dc0b027d 882 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 883 write_sequnlock(&state->seqlock);
884 spin_lock(&state->owner->so_lock);
dc0b027d 885 update_open_stateflags(state, fmode);
ec073428 886 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 887}
888
dc0b027d 889static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 890{
891 struct nfs_inode *nfsi = NFS_I(state->inode);
892 struct nfs_delegation *deleg_cur;
893 int ret = 0;
894
dc0b027d 895 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 896
897 rcu_read_lock();
898 deleg_cur = rcu_dereference(nfsi->delegation);
899 if (deleg_cur == NULL)
900 goto no_delegation;
901
902 spin_lock(&deleg_cur->lock);
903 if (nfsi->delegation != deleg_cur ||
dc0b027d 904 (deleg_cur->type & fmode) != fmode)
34310430
TM		 905 goto no_delegation_unlock;
906
907 if (delegation == NULL)
908 delegation = &deleg_cur->stateid;
909 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
910 goto no_delegation_unlock;
911
b7391f44 912 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 913 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 914 ret = 1;
915no_delegation_unlock:
916 spin_unlock(&deleg_cur->lock);
917no_delegation:
918 rcu_read_unlock();
919
920 if (!ret && open_stateid != NULL) {
dc0b027d 921 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 922 ret = 1;
923 }
924
925 return ret;
926}
927
928
dc0b027d 929static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 930{
931 struct nfs_delegation *delegation;
932
933 rcu_read_lock();
934 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 935 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 936 rcu_read_unlock();
937 return;
938 }
939 rcu_read_unlock();
940 nfs_inode_return_delegation(inode);
941}
942
6ee41268 943static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 944{
945 struct nfs4_state *state = opendata->state;
946 struct nfs_inode *nfsi = NFS_I(state->inode);
947 struct nfs_delegation *delegation;
dc0b027d
TM		 948 int open_mode = opendata->o_arg.open_flags & O_EXCL;
949 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 950 nfs4_stateid stateid;
951 int ret = -EAGAIN;
952
aac00a8d 953 for (;;) {
dc0b027d 954 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 955 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 956 if (can_open_cached(state, fmode, open_mode)) {
957 update_open_stateflags(state, fmode);
6ee41268 958 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 959 goto out_return_state;
960 }
961 spin_unlock(&state->owner->so_lock);
962 }
34310430
TM		 963 rcu_read_lock();
964 delegation = rcu_dereference(nfsi->delegation);
965 if (delegation == NULL ||
dc0b027d 966 !can_open_delegated(delegation, fmode)) {
34310430 967 rcu_read_unlock();
aac00a8d 968 break;
34310430 969 }
aac00a8d
TM		 970 /* Save the delegation */
971 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
972 rcu_read_unlock();
af22f94a 973 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 974 if (ret != 0)
975 goto out;
976 ret = -EAGAIN;
34310430
TM		 977
978 /* Try to update the stateid using the delegation */
dc0b027d 979 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 980 goto out_return_state;
aac00a8d 981 }
aac00a8d
TM		 982out:
983 return ERR_PTR(ret);
984out_return_state:
985 atomic_inc(&state->count);
986 return state;
987}
988
24ac23ab
TM		 989static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
990{
991 struct inode *inode;
992 struct nfs4_state *state = NULL;
003707c7 993 struct nfs_delegation *delegation;
1b370bc2 994 int ret;
24ac23ab 995
aac00a8d 996 if (!data->rpc_done) {
6ee41268 997 state = nfs4_try_open_cached(data);
aac00a8d
TM		 998 goto out;
999 }
1000
1b370bc2 1001 ret = -EAGAIN;
24ac23ab 1002 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1003 goto err;
24ac23ab 1004 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1005 ret = PTR_ERR(inode);
03f28e3a 1006 if (IS_ERR(inode))
1b370bc2
TM		 1007 goto err;
1008 ret = -ENOMEM;
24ac23ab
TM		 1009 state = nfs4_get_open_state(inode, data->owner);
1010 if (state == NULL)
1b370bc2 1011 goto err_put_inode;
549d6ed5 1012 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1013 int delegation_flags = 0;
1014
003707c7
TM		 1015 rcu_read_lock();
1016 delegation = rcu_dereference(NFS_I(inode)->delegation);
1017 if (delegation)
1018 delegation_flags = delegation->flags;
1019 rcu_read_unlock();
15c831bf 1020 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1021 nfs_inode_set_delegation(state->inode,
1022 data->owner->so_cred,
1023 &data->o_res);
1024 else
1025 nfs_inode_reclaim_delegation(state->inode,
1026 data->owner->so_cred,
1027 &data->o_res);
1028 }
34310430
TM		 1029
1030 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1031 data->o_arg.fmode);
24ac23ab 1032 iput(inode);
aac00a8d 1033out:
24ac23ab 1034 return state;
1b370bc2
TM		 1035err_put_inode:
1036 iput(inode);
1037err:
1038 return ERR_PTR(ret);
24ac23ab
TM		 1039}
1040
864472e9
TM		 1041static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1042{
1043 struct nfs_inode *nfsi = NFS_I(state->inode);
1044 struct nfs_open_context *ctx;
1045
1046 spin_lock(&state->inode->i_lock);
1047 list_for_each_entry(ctx, &nfsi->open_files, list) {
1048 if (ctx->state != state)
1049 continue;
1050 get_nfs_open_context(ctx);
1051 spin_unlock(&state->inode->i_lock);
1052 return ctx;
1053 }
1054 spin_unlock(&state->inode->i_lock);
1055 return ERR_PTR(-ENOENT);
1056}
1057
6f220ed5
TM		 1058static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1059{
1060 struct nfs4_opendata *opendata;
1061
8535b2be 1062 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1063 if (opendata == NULL)
1064 return ERR_PTR(-ENOMEM);
1065 opendata->state = state;
1066 atomic_inc(&state->count);
1067 return opendata;
1068}
1069
dc0b027d 1070static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1071{
2ced46c2 1072 struct nfs4_state *newstate;
864472e9
TM		 1073 int ret;
1074
dc0b027d
TM		 1075 opendata->o_arg.open_flags = 0;
1076 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1077 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1078 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1079 nfs4_init_opendata_res(opendata);
b257957e 1080 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1081 if (ret != 0)
1082 return ret;
2ced46c2 1083 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1084 if (IS_ERR(newstate))
1085 return PTR_ERR(newstate);
dc0b027d 1086 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1087 *res = newstate;
864472e9
TM		 1088 return 0;
1089}
1090
1091static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1092{
864472e9 1093 struct nfs4_state *newstate;
864472e9
TM		 1094 int ret;
1095
1096 /* memory barrier prior to reading state->n_* */
2ced46c2 1097 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1098 smp_rmb();
1099 if (state->n_rdwr != 0) {
2ced46c2 1100 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1101 if (ret != 0)
1102 return ret;
2ced46c2
TM		 1103 if (newstate != state)
1104 return -ESTALE;
864472e9
TM		 1105 }
1106 if (state->n_wronly != 0) {
2ced46c2 1107 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1108 if (ret != 0)
1109 return ret;
2ced46c2
TM		 1110 if (newstate != state)
1111 return -ESTALE;
864472e9
TM		 1112 }
1113 if (state->n_rdonly != 0) {
2ced46c2 1114 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1115 if (ret != 0)
1116 return ret;
2ced46c2
TM		 1117 if (newstate != state)
1118 return -ESTALE;
864472e9 1119 }
1ac7e2fd
TM		 1120 /*
1121 * We may have performed cached opens for all three recoveries.
1122 * Check if we need to update the current stateid.
1123 */
1124 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1125 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1126 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1127 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1128 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1129 write_sequnlock(&state->seqlock);
1ac7e2fd 1130 }
864472e9
TM		 1131 return 0;
1132}
1133
1da177e4
LT		 1134/*
1135 * OPEN_RECLAIM:
1136 * reclaim state on the server after a reboot.
1da177e4 1137 */
539cd03a 1138static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1139{
1ac7e2fd 1140 struct nfs_delegation *delegation;
864472e9 1141 struct nfs4_opendata *opendata;
dc0b027d 1142 fmode_t delegation_type = 0;
1da177e4
LT		 1143 int status;
1144
6f220ed5
TM		 1145 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1146 if (IS_ERR(opendata))
1147 return PTR_ERR(opendata);
864472e9
TM		 1148 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1149 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1150 rcu_read_lock();
1151 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1152 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1153 delegation_type = delegation->type;
1ac7e2fd 1154 rcu_read_unlock();
864472e9
TM		 1155 opendata->o_arg.u.delegation_type = delegation_type;
1156 status = nfs4_open_recover(opendata, state);
c6d00e63 1157 nfs4_opendata_put(opendata);
1da177e4
LT		 1158 return status;
1159}
1160
539cd03a 1161static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1162{
1163 struct nfs_server *server = NFS_SERVER(state->inode);
1164 struct nfs4_exception exception = { };
1165 int err;
1166 do {
539cd03a 1167 err = _nfs4_do_open_reclaim(ctx, state);
2c643488 1168 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 1169 break;
1170 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1171 } while (exception.retry);
1172 return err;
1173}
1174
864472e9
TM		 1175static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1176{
1177 struct nfs_open_context *ctx;
1178 int ret;
1179
1180 ctx = nfs4_state_find_open_context(state);
1181 if (IS_ERR(ctx))
1182 return PTR_ERR(ctx);
539cd03a 1183 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1184 put_nfs_open_context(ctx);
1185 return ret;
1186}
1187
13437e12 1188static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1189{
e56e0b78 1190 struct nfs4_opendata *opendata;
864472e9 1191 int ret;
1da177e4 1192
6f220ed5
TM		 1193 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1194 if (IS_ERR(opendata))
1195 return PTR_ERR(opendata);
e56e0b78 1196 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1197 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1198 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1199 ret = nfs4_open_recover(opendata, state);
c6d00e63 1200 nfs4_opendata_put(opendata);
864472e9 1201 return ret;
1da177e4
LT		 1202}
1203
13437e12 1204int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1205{
1206 struct nfs4_exception exception = { };
539cd03a 1207 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1208 int err;
1209 do {
13437e12 1210 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1211 switch (err) {
1212 case 0:
965b5d67
TM		 1213 case -ENOENT:
1214 case -ESTALE:
1215 goto out;
bcfa49f6
RL		 1216 case -NFS4ERR_BADSESSION:
1217 case -NFS4ERR_BADSLOT:
1218 case -NFS4ERR_BAD_HIGH_SLOT:
1219 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1220 case -NFS4ERR_DEADSESSION:
1221 nfs4_schedule_state_recovery(
1222 server->nfs_client);
1223 goto out;
1da177e4
LT		 1224 case -NFS4ERR_STALE_CLIENTID:
1225 case -NFS4ERR_STALE_STATEID:
1226 case -NFS4ERR_EXPIRED:
1227 /* Don't recall a delegation if it was lost */
7539bbab 1228 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1229 goto out;
1230 case -ERESTARTSYS:
1231 /*
1232 * The show must go on: exit, but mark the
1233 * stateid as needing recovery.
1234 */
1235 case -NFS4ERR_ADMIN_REVOKED:
1236 case -NFS4ERR_BAD_STATEID:
1237 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1238 case -ENOMEM:
1239 err = 0;
1240 goto out;
1da177e4
LT		 1241 }
1242 err = nfs4_handle_exception(server, err, &exception);
1243 } while (exception.retry);
965b5d67 1244out:
1da177e4
LT		 1245 return err;
1246}
1247
cdd4e68b
TM		 1248static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1249{
1250 struct nfs4_opendata *data = calldata;
1251
1252 data->rpc_status = task->tk_status;
1253 if (RPC_ASSASSINATED(task))
1254 return;
26e976a8 1255 if (data->rpc_status == 0) {
cdd4e68b
TM		 1256 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1257 sizeof(data->o_res.stateid.data));
bb22629e 1258 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1259 renew_lease(data->o_res.server, data->timestamp);
3e309914 1260 data->rpc_done = 1;
26e976a8 1261 }
cdd4e68b
TM		 1262}
1263
1264static void nfs4_open_confirm_release(void *calldata)
1265{
1266 struct nfs4_opendata *data = calldata;
1267 struct nfs4_state *state = NULL;
1268
1269 /* If this request hasn't been cancelled, do nothing */
1270 if (data->cancelled == 0)
1271 goto out_free;
1272 /* In case of error, no cleanup! */
3e309914 1273 if (!data->rpc_done)
cdd4e68b 1274 goto out_free;
cdd4e68b 1275 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1276 if (!IS_ERR(state))
dc0b027d 1277 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1278out_free:
c6d00e63 1279 nfs4_opendata_put(data);
cdd4e68b
TM		 1280}
1281
1282static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1283 .rpc_call_done = nfs4_open_confirm_done,
1284 .rpc_release = nfs4_open_confirm_release,
1285};
1286
1287/*
1288 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1289 */
1290static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1291{
1292 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1293 struct rpc_task *task;
5138fde0
TM		 1294 struct rpc_message msg = {
1295 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1296 .rpc_argp = &data->c_arg,
1297 .rpc_resp = &data->c_res,
1298 .rpc_cred = data->owner->so_cred,
1299 };
c970aa85
TM		 1300 struct rpc_task_setup task_setup_data = {
1301 .rpc_client = server->client,
5138fde0 1302 .rpc_message = &msg,
c970aa85
TM		 1303 .callback_ops = &nfs4_open_confirm_ops,
1304 .callback_data = data,
101070ca 1305 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1306 .flags = RPC_TASK_ASYNC,
1307 };
1da177e4
LT		 1308 int status;
1309
c6d00e63 1310 kref_get(&data->kref);
3e309914
TM		 1311 data->rpc_done = 0;
1312 data->rpc_status = 0;
5138fde0 1313 data->timestamp = jiffies;
c970aa85 1314 task = rpc_run_task(&task_setup_data);
7a1218a2 1315 if (IS_ERR(task))
cdd4e68b 1316 return PTR_ERR(task);
cdd4e68b
TM		 1317 status = nfs4_wait_for_completion_rpc_task(task);
1318 if (status != 0) {
1319 data->cancelled = 1;
1320 smp_wmb();
1321 } else
1322 status = data->rpc_status;
e6b3c4db 1323 rpc_put_task(task);
1da177e4
LT		 1324 return status;
1325}
1326
24ac23ab 1327static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1328{
24ac23ab
TM		 1329 struct nfs4_opendata *data = calldata;
1330 struct nfs4_state_owner *sp = data->owner;
5138fde0 1331
24ac23ab
TM		 1332 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1333 return;
aac00a8d
TM		 1334 /*
1335 * Check if we still need to send an OPEN call, or if we can use
1336 * a delegation instead.
1337 */
1338 if (data->state != NULL) {
1339 struct nfs_delegation *delegation;
1340
dc0b027d 1341 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1342 goto out_no_action;
aac00a8d
TM		 1343 rcu_read_lock();
1344 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1345 if (delegation != NULL &&
15c831bf 1346 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1347 rcu_read_unlock();
6ee41268 1348 goto out_no_action;
aac00a8d
TM		 1349 }
1350 rcu_read_unlock();
1351 }
24ac23ab 1352 /* Update sequence id. */
9f958ab8 1353 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1354 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1355 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1356 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1357 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1358 }
26e976a8 1359 data->timestamp = jiffies;
d898528c
AA		 1360 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1361 &data->o_arg.seq_args,
1362 &data->o_res.seq_res, 1, task))
1363 return;
5138fde0 1364 rpc_call_start(task);
6ee41268
TM		 1365 return;
1366out_no_action:
1367 task->tk_action = NULL;
1368
24ac23ab 1369}
1da177e4 1370
b257957e
AB		 1371static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1372{
1373 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1374 nfs4_open_prepare(task, calldata);
1375}
1376
24ac23ab
TM		 1377static void nfs4_open_done(struct rpc_task *task, void *calldata)
1378{
1379 struct nfs4_opendata *data = calldata;
1da177e4 1380
24ac23ab 1381 data->rpc_status = task->tk_status;
d898528c 1382
d61e612a
TM		 1383 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1384 task->tk_status);
d898528c 1385
24ac23ab
TM		 1386 if (RPC_ASSASSINATED(task))
1387 return;
1388 if (task->tk_status == 0) {
1389 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1390 case S_IFREG:
1391 break;
1392 case S_IFLNK:
24ac23ab 1393 data->rpc_status = -ELOOP;
6f926b5b
TM		 1394 break;
1395 case S_IFDIR:
24ac23ab 1396 data->rpc_status = -EISDIR;
6f926b5b
TM		 1397 break;
1398 default:
24ac23ab 1399 data->rpc_status = -ENOTDIR;
6f926b5b 1400 }
26e976a8 1401 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1402 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1403 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1404 }
3e309914 1405 data->rpc_done = 1;
24ac23ab 1406}
6f926b5b 1407
24ac23ab
TM		 1408static void nfs4_open_release(void *calldata)
1409{
1410 struct nfs4_opendata *data = calldata;
1411 struct nfs4_state *state = NULL;
1412
1413 /* If this request hasn't been cancelled, do nothing */
1414 if (data->cancelled == 0)
1415 goto out_free;
1416 /* In case of error, no cleanup! */
3e309914 1417 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1418 goto out_free;
1419 /* In case we need an open_confirm, no cleanup! */
1420 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1421 goto out_free;
24ac23ab 1422 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1423 if (!IS_ERR(state))
dc0b027d 1424 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1425out_free:
c6d00e63 1426 nfs4_opendata_put(data);
24ac23ab
TM		 1427}
1428
1429static const struct rpc_call_ops nfs4_open_ops = {
1430 .rpc_call_prepare = nfs4_open_prepare,
1431 .rpc_call_done = nfs4_open_done,
1432 .rpc_release = nfs4_open_release,
1433};
1434
b257957e
AB		 1435static const struct rpc_call_ops nfs4_recover_open_ops = {
1436 .rpc_call_prepare = nfs4_recover_open_prepare,
1437 .rpc_call_done = nfs4_open_done,
1438 .rpc_release = nfs4_open_release,
1439};
1440
1441static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1442{
1443 struct inode *dir = data->dir->d_inode;
1444 struct nfs_server *server = NFS_SERVER(dir);
1445 struct nfs_openargs *o_arg = &data->o_arg;
1446 struct nfs_openres *o_res = &data->o_res;
1447 struct rpc_task *task;
5138fde0
TM		 1448 struct rpc_message msg = {
1449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1450 .rpc_argp = o_arg,
1451 .rpc_resp = o_res,
1452 .rpc_cred = data->owner->so_cred,
1453 };
c970aa85
TM		 1454 struct rpc_task_setup task_setup_data = {
1455 .rpc_client = server->client,
5138fde0 1456 .rpc_message = &msg,
c970aa85
TM		 1457 .callback_ops = &nfs4_open_ops,
1458 .callback_data = data,
101070ca 1459 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1460 .flags = RPC_TASK_ASYNC,
1461 };
24ac23ab
TM		 1462 int status;
1463
c6d00e63 1464 kref_get(&data->kref);
3e309914
TM		 1465 data->rpc_done = 0;
1466 data->rpc_status = 0;
2ced46c2 1467 data->cancelled = 0;
b257957e
AB		 1468 if (isrecover)
1469 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1470 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1471 if (IS_ERR(task))
1472 return PTR_ERR(task);
1473 status = nfs4_wait_for_completion_rpc_task(task);
1474 if (status != 0) {
1475 data->cancelled = 1;
1476 smp_wmb();
1477 } else
1478 status = data->rpc_status;
1479 rpc_put_task(task);
1480
1481 return status;
1482}
1483
1484static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1485{
1486 struct inode *dir = data->dir->d_inode;
1487 struct nfs_openres *o_res = &data->o_res;
1488 int status;
1489
1490 status = nfs4_run_open_task(data, 1);
1491 if (status != 0 || !data->rpc_done)
1492 return status;
1493
1494 nfs_refresh_inode(dir, o_res->dir_attr);
1495
1496 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1497 status = _nfs4_proc_open_confirm(data);
1498 if (status != 0)
1499 return status;
1500 }
1501
1502 return status;
1503}
1504
1505/*
1506 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1507 */
1508static int _nfs4_proc_open(struct nfs4_opendata *data)
1509{
1510 struct inode *dir = data->dir->d_inode;
1511 struct nfs_server *server = NFS_SERVER(dir);
1512 struct nfs_openargs *o_arg = &data->o_arg;
1513 struct nfs_openres *o_res = &data->o_res;
1514 int status;
1515
1516 status = nfs4_run_open_task(data, 0);
3e309914 1517 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1518 return status;
1519
56ae19f3
TM		 1520 if (o_arg->open_flags & O_CREAT) {
1521 update_changeattr(dir, &o_res->cinfo);
1522 nfs_post_op_update_inode(dir, o_res->dir_attr);
1523 } else
1524 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1525 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1526 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1527 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1528 status = _nfs4_proc_open_confirm(data);
1da177e4 1529 if (status != 0)
24ac23ab 1530 return status;
1da177e4
LT		 1531 }
1532 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1533 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1534 return 0;
1da177e4
LT		 1535}
1536
10afec90 1537static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1538{
7539bbab 1539 struct nfs_client *clp = server->nfs_client;
a78cb57a 1540 unsigned int loop;
6b30954e 1541 int ret;
58d9714a 1542
a78cb57a 1543 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1544 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1545 if (ret != 0)
a78cb57a 1546 break;
e598d843
TM		 1547 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1548 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1549 break;
58d9714a 1550 nfs4_schedule_state_recovery(clp);
a78cb57a 1551 ret = -EIO;
6b30954e 1552 }
a78cb57a 1553 return ret;
58d9714a
TM		 1554}
1555
1da177e4
LT		 1556/*
1557 * OPEN_EXPIRED:
1558 * reclaim state on the server after a network partition.
1559 * Assumes caller holds the appropriate lock
1560 */
539cd03a 1561static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1562{
e56e0b78 1563 struct nfs4_opendata *opendata;
864472e9 1564 int ret;
1da177e4 1565
6f220ed5
TM		 1566 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1567 if (IS_ERR(opendata))
1568 return PTR_ERR(opendata);
864472e9 1569 ret = nfs4_open_recover(opendata, state);
35d05778 1570 if (ret == -ESTALE)
539cd03a 1571 d_drop(ctx->path.dentry);
c6d00e63 1572 nfs4_opendata_put(opendata);
864472e9 1573 return ret;
1da177e4
LT		 1574}
1575
a9ed2e25 1576static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1577{
539cd03a 1578 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1579 struct nfs4_exception exception = { };
1580 int err;
1581
1582 do {
539cd03a 1583 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1584 switch (err) {
1585 default:
1586 goto out;
1587 case -NFS4ERR_GRACE:
1588 case -NFS4ERR_DELAY:
2c643488 1589 case -EKEYEXPIRED:
a9ed2e25
TM		 1590 nfs4_handle_exception(server, err, &exception);
1591 err = 0;
1592 }
202b50dc 1593 } while (exception.retry);
a9ed2e25 1594out:
202b50dc
TM		 1595 return err;
1596}
1597
1da177e4
LT		 1598static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1599{
1da177e4 1600 struct nfs_open_context *ctx;
864472e9 1601 int ret;
1da177e4 1602
864472e9
TM		 1603 ctx = nfs4_state_find_open_context(state);
1604 if (IS_ERR(ctx))
1605 return PTR_ERR(ctx);
539cd03a 1606 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1607 put_nfs_open_context(ctx);
1608 return ret;
1da177e4
LT		 1609}
1610
aa53ed54
JL		 1611/*
1612 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1613 * fields corresponding to attributes that were used to store the verifier.
1614 * Make sure we clobber those fields in the later setattr call
1615 */
1616static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1617{
1618 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1619 !(sattr->ia_valid & ATTR_ATIME_SET))
1620 sattr->ia_valid |= ATTR_ATIME;
1621
1622 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1623 !(sattr->ia_valid & ATTR_MTIME_SET))
1624 sattr->ia_valid |= ATTR_MTIME;
1625}
1626
1da177e4 1627/*
24ac23ab 1628 * Returns a referenced nfs4_state
1da177e4 1629 */
dc0b027d 1630static 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		 1631{
1632 struct nfs4_state_owner *sp;
1633 struct nfs4_state *state = NULL;
1634 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1635 struct nfs4_opendata *opendata;
aac00a8d 1636 int status;
1da177e4
LT		 1637
1638 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1639 status = -ENOMEM;
1640 if (!(sp = nfs4_get_state_owner(server, cred))) {
1641 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1642 goto out_err;
1643 }
58d9714a
TM		 1644 status = nfs4_recover_expired_lease(server);
1645 if (status != 0)
b4454fe1 1646 goto err_put_state_owner;
aac00a8d 1647 if (path->dentry->d_inode != NULL)
dc0b027d 1648 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1649 status = -ENOMEM;
8535b2be 1650 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1651 if (opendata == NULL)
95d35cb4 1652 goto err_put_state_owner;
1da177e4 1653
aac00a8d
TM		 1654 if (path->dentry->d_inode != NULL)
1655 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1656
24ac23ab 1657 status = _nfs4_proc_open(opendata);
1da177e4 1658 if (status != 0)
c6d00e63 1659 goto err_opendata_put;
1da177e4 1660
24ac23ab 1661 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1662 status = PTR_ERR(state);
1663 if (IS_ERR(state))
c6d00e63 1664 goto err_opendata_put;
0df5dd4a 1665 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1666 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1667
1668 if (opendata->o_arg.open_flags & O_EXCL) {
1669 nfs4_exclusive_attrset(opendata, sattr);
1670
1671 nfs_fattr_init(opendata->o_res.f_attr);
1672 status = nfs4_do_setattr(state->inode, cred,
1673 opendata->o_res.f_attr, sattr,
1674 state);
1675 if (status == 0)
1676 nfs_setattr_update_inode(state->inode, sattr);
1677 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1678 }
c6d00e63 1679 nfs4_opendata_put(opendata);
1da177e4 1680 nfs4_put_state_owner(sp);
1da177e4
LT		 1681 *res = state;
1682 return 0;
c6d00e63
TM		 1683err_opendata_put:
1684 nfs4_opendata_put(opendata);
e56e0b78
TM		 1685err_put_state_owner:
1686 nfs4_put_state_owner(sp);
1da177e4 1687out_err:
1da177e4
LT		 1688 *res = NULL;
1689 return status;
1690}
1691
1692
dc0b027d 1693static 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		 1694{
1695 struct nfs4_exception exception = { };
1696 struct nfs4_state *res;
1697 int status;
1698
1699 do {
dc0b027d 1700 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1701 if (status == 0)
1702 break;
1703 /* NOTE: BAD_SEQID means the server and client disagree about the
1704 * book-keeping w.r.t. state-changing operations
1705 * (OPEN/CLOSE/LOCK/LOCKU...)
1706 * It is actually a sign of a bug on the client or on the server.
1707 *
1708 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1709 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1710 * have unhashed the old state_owner for us, and that we can
1711 * therefore safely retry using a new one. We should still warn
1712 * the user though...
1713 */
1714 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1715 printk(KERN_WARNING "NFS: v4 server %s "
1716 " returned a bad sequence-id error!\n",
1717 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1718 exception.retry = 1;
1719 continue;
1720 }
550f5747
TM		 1721 /*
1722 * BAD_STATEID on OPEN means that the server cancelled our
1723 * state before it received the OPEN_CONFIRM.
1724 * Recover by retrying the request as per the discussion
1725 * on Page 181 of RFC3530.
1726 */
1727 if (status == -NFS4ERR_BAD_STATEID) {
1728 exception.retry = 1;
1729 continue;
1730 }
aac00a8d
TM		 1731 if (status == -EAGAIN) {
1732 /* We must have found a delegation */
1733 exception.retry = 1;
1734 continue;
1735 }
1da177e4
LT		 1736 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1737 status, &exception));
1738 } while (exception.retry);
1739 return res;
1740}
1741
659bfcd6
TM		 1742static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1743 struct nfs_fattr *fattr, struct iattr *sattr,
1744 struct nfs4_state *state)
1da177e4 1745{
3e4f6290 1746 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1747 struct nfs_setattrargs arg = {
3e4f6290 1748 .fh = NFS_FH(inode),
1da177e4
LT		 1749 .iap = sattr,
1750 .server = server,
1751 .bitmask = server->attr_bitmask,
1752 };
1753 struct nfs_setattrres res = {
1754 .fattr = fattr,
1755 .server = server,
1756 };
1757 struct rpc_message msg = {
659bfcd6
TM		 1758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1759 .rpc_argp = &arg,
1760 .rpc_resp = &res,
1761 .rpc_cred = cred,
1da177e4 1762 };
26e976a8 1763 unsigned long timestamp = jiffies;
65e4308d 1764 int status;
1da177e4 1765
0e574af1 1766 nfs_fattr_init(fattr);
1da177e4 1767
3e4f6290
TM		 1768 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1769 /* Use that stateid */
1770 } else if (state != NULL) {
08e9eac4
TM		 1771 nfs4_copy_stateid(&arg.stateid, state, current->files);
1772 } else
1da177e4
LT		 1773 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1774
cccef3b9 1775 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1776 if (status == 0 && state != NULL)
1777 renew_lease(server, timestamp);
65e4308d 1778 return status;
1da177e4
LT		 1779}
1780
659bfcd6
TM		 1781static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1782 struct nfs_fattr *fattr, struct iattr *sattr,
1783 struct nfs4_state *state)
1da177e4 1784{
3e4f6290 1785 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1786 struct nfs4_exception exception = { };
1787 int err;
1788 do {
1789 err = nfs4_handle_exception(server,
659bfcd6 1790 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1791 &exception);
1792 } while (exception.retry);
1793 return err;
1794}
1795
1796struct nfs4_closedata {
4a35bd41 1797 struct path path;
1da177e4
LT		 1798 struct inode *inode;
1799 struct nfs4_state *state;
1800 struct nfs_closeargs arg;
1801 struct nfs_closeres res;
516a6af6 1802 struct nfs_fattr fattr;
26e976a8 1803 unsigned long timestamp;
1da177e4
LT		 1804};
1805
963d8fe5 1806static void nfs4_free_closedata(void *data)
9512135d 1807{
963d8fe5
TM		 1808 struct nfs4_closedata *calldata = data;
1809 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1810
1811 nfs4_put_open_state(calldata->state);
1812 nfs_free_seqid(calldata->arg.seqid);
9512135d 1813 nfs4_put_state_owner(sp);
31f31db1 1814 path_put(&calldata->path);
9512135d
TM		 1815 kfree(calldata);
1816}
1817
88069f77
TM		 1818static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1819 fmode_t fmode)
1820{
1821 spin_lock(&state->owner->so_lock);
1822 if (!(fmode & FMODE_READ))
1823 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1824 if (!(fmode & FMODE_WRITE))
1825 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1826 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1827 spin_unlock(&state->owner->so_lock);
1828}
1829
963d8fe5 1830static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1831{
963d8fe5 1832 struct nfs4_closedata *calldata = data;
1da177e4 1833 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1834 struct nfs_server *server = NFS_SERVER(calldata->inode);
1835
19ddab06 1836 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1837 if (RPC_ASSASSINATED(task))
1838 return;
1da177e4
LT		 1839 /* hmm. we are done with the inode, and in the process of freeing
1840 * the state_owner. we keep this around to process errors
1841 */
1da177e4
LT		 1842 switch (task->tk_status) {
1843 case 0:
45328c35 1844 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1845 renew_lease(server, calldata->timestamp);
88069f77
TM		 1846 nfs4_close_clear_stateid_flags(state,
1847 calldata->arg.fmode);
1da177e4
LT		 1848 break;
1849 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1850 case -NFS4ERR_OLD_STATEID:
1851 case -NFS4ERR_BAD_STATEID:
1da177e4 1852 case -NFS4ERR_EXPIRED:
dc0b027d 1853 if (calldata->arg.fmode == 0)
9e33bed5 1854 break;
1da177e4 1855 default:
72211dbe
TM		 1856 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1857 rpc_restart_call_prepare(task);
1da177e4 1858 }
72211dbe 1859 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1860 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1861}
1862
4ce70ada 1863static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1864{
4ce70ada 1865 struct nfs4_closedata *calldata = data;
9512135d 1866 struct nfs4_state *state = calldata->state;
88069f77 1867 int call_close = 0;
9512135d 1868
963d8fe5 1869 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1870 return;
003707c7 1871
88069f77
TM		 1872 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1873 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1874 spin_lock(&state->owner->so_lock);
003707c7 1875 /* Calculate the change in open mode */
e7616923 1876 if (state->n_rdwr == 0) {
003707c7 1877 if (state->n_rdonly == 0) {
88069f77
TM		 1878 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1879 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1880 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1881 }
1882 if (state->n_wronly == 0) {
88069f77
TM		 1883 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1884 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1885 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1886 }
e7616923 1887 }
4cecb76f 1888 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1889
1890 if (!call_close) {
963d8fe5
TM		 1891 /* Note: exit _without_ calling nfs4_close_done */
1892 task->tk_action = NULL;
9512135d
TM		 1893 return;
1894 }
88069f77
TM		 1895
1896 if (calldata->arg.fmode == 0)
1897 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1898
516a6af6 1899 nfs_fattr_init(calldata->res.fattr);
26e976a8 1900 calldata->timestamp = jiffies;
19ddab06
AA		 1901 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1902 &calldata->arg.seq_args, &calldata->res.seq_res,
1903 1, task))
1904 return;
5138fde0 1905 rpc_call_start(task);
1da177e4
LT		 1906}
1907
963d8fe5 1908static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1909 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1910 .rpc_call_done = nfs4_close_done,
1911 .rpc_release = nfs4_free_closedata,
1912};
1913
1da177e4
LT		 1914/*
1915 * It is possible for data to be read/written from a mem-mapped file
1916 * after the sys_close call (which hits the vfs layer as a flush).
1917 * This means that we can't safely call nfsv4 close on a file until
1918 * the inode is cleared. This in turn means that we are not good
1919 * NFSv4 citizens - we do not indicate to the server to update the file's
1920 * share state even when we are done with one of the three share
1921 * stateid's in the inode.
1922 *
1923 * NOTE: Caller must be holding the sp->so_owner semaphore!
1924 */
8535b2be 1925int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 1926{
4a35bd41 1927 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1928 struct nfs4_closedata *calldata;
b39e625b
TM		 1929 struct nfs4_state_owner *sp = state->owner;
1930 struct rpc_task *task;
5138fde0
TM		 1931 struct rpc_message msg = {
1932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1933 .rpc_cred = state->owner->so_cred,
1934 };
c970aa85
TM		 1935 struct rpc_task_setup task_setup_data = {
1936 .rpc_client = server->client,
5138fde0 1937 .rpc_message = &msg,
c970aa85 1938 .callback_ops = &nfs4_close_ops,
101070ca 1939 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1940 .flags = RPC_TASK_ASYNC,
1941 };
9512135d 1942 int status = -ENOMEM;
1da177e4 1943
8535b2be 1944 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 1945 if (calldata == NULL)
9512135d 1946 goto out;
4a35bd41 1947 calldata->inode = state->inode;
1da177e4 1948 calldata->state = state;
4a35bd41 1949 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1950 calldata->arg.stateid = &state->open_stateid;
1da177e4 1951 /* Serialization for the sequence id */
8535b2be 1952 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 1953 if (calldata->arg.seqid == NULL)
1954 goto out_free_calldata;
dc0b027d 1955 calldata->arg.fmode = 0;
a65318bf 1956 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1957 calldata->res.fattr = &calldata->fattr;
c1d51931 1958 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1959 calldata->res.server = server;
5f7dbd5c 1960 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
f6948697
AV		 1961 path_get(path);
1962 calldata->path = *path;
9512135d 1963
5138fde0
TM		 1964 msg.rpc_argp = &calldata->arg,
1965 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1966 task_setup_data.callback_data = calldata;
1967 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1968 if (IS_ERR(task))
1969 return PTR_ERR(task);
a49c3c77
TM		 1970 status = 0;
1971 if (wait)
1972 status = rpc_wait_for_completion_task(task);
b39e625b 1973 rpc_put_task(task);
a49c3c77 1974 return status;
9512135d
TM		 1975out_free_calldata:
1976 kfree(calldata);
1977out:
b39e625b
TM		 1978 nfs4_put_open_state(state);
1979 nfs4_put_state_owner(sp);
9512135d 1980 return status;
1da177e4
LT		 1981}
1982
dc0b027d 1983static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1984{
1985 struct file *filp;
1b45c46c 1986 int ret;
02a913a7 1987
1b45c46c 1988 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1989 if (fmode & FMODE_EXEC) {
af22f94a 1990 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1991 state->owner->so_cred,
1992 nd->intent.open.flags);
1993 if (ret < 0)
1994 goto out_close;
1995 }
4a35bd41 1996 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1997 if (!IS_ERR(filp)) {
1998 struct nfs_open_context *ctx;
cd3758e3 1999 ctx = nfs_file_open_context(filp);
02a913a7 2000 ctx->state = state;
95cf959b
TM		 2001 return 0;
2002 }
1b45c46c
TM		 2003 ret = PTR_ERR(filp);
2004out_close:
dc0b027d 2005 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 2006 return ret;
02a913a7
TM		 2007}
2008
2009struct dentry *
1da177e4
LT		 2010nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
2011{
ad389da7 2012 struct path path = {
4ac91378 2013 .mnt = nd->path.mnt,
ad389da7
TM		 2014 .dentry = dentry,
2015 };
4ac91378 2016 struct dentry *parent;
1da177e4
LT		 2017 struct iattr attr;
2018 struct rpc_cred *cred;
2019 struct nfs4_state *state;
02a913a7 2020 struct dentry *res;
dc0b027d 2021 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2022
2023 if (nd->flags & LOOKUP_CREATE) {
2024 attr.ia_mode = nd->intent.open.create_mode;
2025 attr.ia_valid = ATTR_MODE;
2026 if (!IS_POSIXACL(dir))
ce3b0f8d 2027 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2028 } else {
2029 attr.ia_valid = 0;
2030 BUG_ON(nd->intent.open.flags & O_CREAT);
2031 }
2032
98a8e323 2033 cred = rpc_lookup_cred();
1da177e4 2034 if (IS_ERR(cred))
02a913a7 2035 return (struct dentry *)cred;
565277f6
TM		 2036 parent = dentry->d_parent;
2037 /* Protect against concurrent sillydeletes */
2038 nfs_block_sillyrename(parent);
dc0b027d 2039 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2040 put_rpccred(cred);
02a913a7 2041 if (IS_ERR(state)) {
d75340cc 2042 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2043 d_add(dentry, NULL);
d75340cc
TM		 2044 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2045 }
565277f6 2046 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2047 return (struct dentry *)state;
2048 }
24ac23ab 2049 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2050 if (res != NULL)
deee9369 2051 path.dentry = res;
d75340cc 2052 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2053 nfs_unblock_sillyrename(parent);
dc0b027d 2054 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2055 return res;
1da177e4
LT		 2056}
2057
2058int
02a913a7 2059nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2060{
ad389da7 2061 struct path path = {
4ac91378 2062 .mnt = nd->path.mnt,
ad389da7
TM		 2063 .dentry = dentry,
2064 };
1da177e4
LT		 2065 struct rpc_cred *cred;
2066 struct nfs4_state *state;
dc0b027d 2067 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2068
98a8e323 2069 cred = rpc_lookup_cred();
1da177e4
LT		 2070 if (IS_ERR(cred))
2071 return PTR_ERR(cred);
dc0b027d 2072 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2073 put_rpccred(cred);
02a913a7
TM		 2074 if (IS_ERR(state)) {
2075 switch (PTR_ERR(state)) {
2076 case -EPERM:
2077 case -EACCES:
2078 case -EDQUOT:
2079 case -ENOSPC:
2080 case -EROFS:
04287f97 2081 return PTR_ERR(state);
b87c0adf
CL		 2082 default:
2083 goto out_drop;
02a913a7 2084 }
02a913a7 2085 }
24ac23ab 2086 if (state->inode == dentry->d_inode) {
d75340cc 2087 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2088 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2089 return 1;
2090 }
dc0b027d 2091 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2092out_drop:
2093 d_drop(dentry);
1da177e4
LT		 2094 return 0;
2095}
2096
1185a552 2097static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2098{
2099 if (ctx->state == NULL)
2100 return;
2101 if (is_sync)
2102 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2103 else
2104 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2105}
1da177e4
LT		 2106
2107static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2108{
43652ad5
BH		 2109 struct nfs4_server_caps_arg args = {
2110 .fhandle = fhandle,
2111 };
1da177e4
LT		 2112 struct nfs4_server_caps_res res = {};
2113 struct rpc_message msg = {
2114 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2115 .rpc_argp = &args,
1da177e4
LT		 2116 .rpc_resp = &res,
2117 };
2118 int status;
2119
cccef3b9 2120 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2121 if (status == 0) {
2122 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2123 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2124 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2125 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2126 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2127 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2128 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2129 server->caps |= NFS_CAP_ACLS;
2130 if (res.has_links != 0)
2131 server->caps |= NFS_CAP_HARDLINKS;
2132 if (res.has_symlinks != 0)
2133 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2134 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2135 server->caps |= NFS_CAP_FILEID;
2136 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2137 server->caps |= NFS_CAP_MODE;
2138 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2139 server->caps |= NFS_CAP_NLINK;
2140 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2141 server->caps |= NFS_CAP_OWNER;
2142 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2143 server->caps |= NFS_CAP_OWNER_GROUP;
2144 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2145 server->caps |= NFS_CAP_ATIME;
2146 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2147 server->caps |= NFS_CAP_CTIME;
2148 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2149 server->caps |= NFS_CAP_MTIME;
2150
a65318bf
TM		 2151 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2152 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2153 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2154 server->acl_bitmask = res.acl_bitmask;
2155 }
cccef3b9 2156
1da177e4
LT		 2157 return status;
2158}
2159
55a97593 2160int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2161{
2162 struct nfs4_exception exception = { };
2163 int err;
2164 do {
2165 err = nfs4_handle_exception(server,
2166 _nfs4_server_capabilities(server, fhandle),
2167 &exception);
2168 } while (exception.retry);
2169 return err;
2170}
2171
2172static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2173 struct nfs_fsinfo *info)
2174{
1da177e4
LT		 2175 struct nfs4_lookup_root_arg args = {
2176 .bitmask = nfs4_fattr_bitmap,
2177 };
2178 struct nfs4_lookup_res res = {
2179 .server = server,
0e574af1 2180 .fattr = info->fattr,
1da177e4
LT		 2181 .fh = fhandle,
2182 };
2183 struct rpc_message msg = {
2184 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2185 .rpc_argp = &args,
2186 .rpc_resp = &res,
2187 };
008f55d0 2188
0e574af1 2189 nfs_fattr_init(info->fattr);
fccba804 2190 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2191}
2192
2193static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2194 struct nfs_fsinfo *info)
2195{
2196 struct nfs4_exception exception = { };
2197 int err;
2198 do {
2199 err = nfs4_handle_exception(server,
2200 _nfs4_lookup_root(server, fhandle, info),
2201 &exception);
2202 } while (exception.retry);
2203 return err;
2204}
2205
54ceac45
DH		 2206/*
2207 * get the file handle for the "/" directory on the server
2208 */
1da177e4 2209static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2210 struct nfs_fsinfo *info)
1da177e4 2211{
1da177e4
LT		 2212 int status;
2213
1da177e4 2214 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2215 if (status == 0)
2216 status = nfs4_server_capabilities(server, fhandle);
2217 if (status == 0)
2218 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2219 return nfs4_map_errors(status);
1da177e4
LT		 2220}
2221
6b97fd3d
MN		 2222/*
2223 * Get locations and (maybe) other attributes of a referral.
2224 * Note that we'll actually follow the referral later when
2225 * we detect fsid mismatch in inode revalidation
2226 */
56659e99 2227static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2228{
2229 int status = -ENOMEM;
2230 struct page *page = NULL;
2231 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2232
2233 page = alloc_page(GFP_KERNEL);
2234 if (page == NULL)
2235 goto out;
2236 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2237 if (locations == NULL)
2238 goto out;
2239
c228fd3a 2240 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2241 if (status != 0)
2242 goto out;
2243 /* Make sure server returned a different fsid for the referral */
2244 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2245 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2246 status = -EIO;
2247 goto out;
2248 }
2249
2250 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2251 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2252 if (!fattr->mode)
2253 fattr->mode = S_IFDIR;
2254 memset(fhandle, 0, sizeof(struct nfs_fh));
2255out:
2256 if (page)
2257 __free_page(page);
2258 if (locations)
2259 kfree(locations);
2260 return status;
2261}
2262
1da177e4
LT		 2263static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2264{
2265 struct nfs4_getattr_arg args = {
2266 .fh = fhandle,
2267 .bitmask = server->attr_bitmask,
2268 };
2269 struct nfs4_getattr_res res = {
2270 .fattr = fattr,
2271 .server = server,
2272 };
2273 struct rpc_message msg = {
2274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2275 .rpc_argp = &args,
2276 .rpc_resp = &res,
2277 };
2278
0e574af1 2279 nfs_fattr_init(fattr);
cccef3b9 2280 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2281}
2282
2283static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2284{
2285 struct nfs4_exception exception = { };
2286 int err;
2287 do {
2288 err = nfs4_handle_exception(server,
2289 _nfs4_proc_getattr(server, fhandle, fattr),
2290 &exception);
2291 } while (exception.retry);
2292 return err;
2293}
2294
2295/*
2296 * The file is not closed if it is opened due to the a request to change
2297 * the size of the file. The open call will not be needed once the
2298 * VFS layer lookup-intents are implemented.
2299 *
2300 * Close is called when the inode is destroyed.
2301 * If we haven't opened the file for O_WRONLY, we
2302 * need to in the size_change case to obtain a stateid.
2303 *
2304 * Got race?
2305 * Because OPEN is always done by name in nfsv4, it is
2306 * possible that we opened a different file by the same
2307 * name. We can recognize this race condition, but we
2308 * can't do anything about it besides returning an error.
2309 *
2310 * This will be fixed with VFS changes (lookup-intent).
2311 */
2312static int
2313nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2314 struct iattr *sattr)
2315{
08e9eac4 2316 struct inode *inode = dentry->d_inode;
659bfcd6 2317 struct rpc_cred *cred = NULL;
d530838b 2318 struct nfs4_state *state = NULL;
1da177e4
LT		 2319 int status;
2320
0e574af1 2321 nfs_fattr_init(fattr);
1da177e4 2322
d530838b 2323 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2324 if (sattr->ia_valid & ATTR_FILE) {
2325 struct nfs_open_context *ctx;
2326
2327 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2328 if (ctx) {
2329 cred = ctx->cred;
2330 state = ctx->state;
2331 }
659bfcd6 2332 }
08e9eac4 2333
659bfcd6 2334 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2335 if (status == 0)
2336 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2337 return status;
2338}
2339
56659e99
TM		 2340static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2341 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2342 struct nfs_fattr *fattr)
2343{
2344 int status;
2345 struct nfs4_lookup_arg args = {
2346 .bitmask = server->attr_bitmask,
2347 .dir_fh = dirfh,
2348 .name = name,
2349 };
2350 struct nfs4_lookup_res res = {
2351 .server = server,
2352 .fattr = fattr,
2353 .fh = fhandle,
2354 };
2355 struct rpc_message msg = {
2356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2357 .rpc_argp = &args,
2358 .rpc_resp = &res,
2359 };
2360
2361 nfs_fattr_init(fattr);
2362
2363 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2364 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2365 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2366 return status;
2367}
2368
2369static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2370 struct qstr *name, struct nfs_fh *fhandle,
2371 struct nfs_fattr *fattr)
2372{
2373 struct nfs4_exception exception = { };
2374 int err;
2375 do {
4e56e082
TM		 2376 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2377 /* FIXME: !!!! */
2378 if (err == -NFS4ERR_MOVED) {
2379 err = -EREMOTE;
2380 break;
2381 }
2382 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2383 } while (exception.retry);
2384 return err;
2385}
2386
56659e99 2387static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2388 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2389{
4e56e082 2390 int status;
1da177e4
LT		 2391
2392 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2393 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2394 if (status == -NFS4ERR_MOVED)
2395 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2396 dprintk("NFS reply lookup: %d\n", status);
2397 return status;
2398}
2399
2400static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2401{
2402 struct nfs4_exception exception = { };
2403 int err;
2404 do {
2405 err = nfs4_handle_exception(NFS_SERVER(dir),
2406 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2407 &exception);
2408 } while (exception.retry);
2409 return err;
2410}
2411
2412static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2413{
76b32999 2414 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2415 struct nfs4_accessargs args = {
2416 .fh = NFS_FH(inode),
76b32999
TM		 2417 .bitmask = server->attr_bitmask,
2418 };
2419 struct nfs4_accessres res = {
2420 .server = server,
1da177e4 2421 };
1da177e4
LT		 2422 struct rpc_message msg = {
2423 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2424 .rpc_argp = &args,
2425 .rpc_resp = &res,
2426 .rpc_cred = entry->cred,
2427 };
2428 int mode = entry->mask;
2429 int status;
2430
2431 /*
2432 * Determine which access bits we want to ask for...
2433 */
2434 if (mode & MAY_READ)
2435 args.access |= NFS4_ACCESS_READ;
2436 if (S_ISDIR(inode->i_mode)) {
2437 if (mode & MAY_WRITE)
2438 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2439 if (mode & MAY_EXEC)
2440 args.access |= NFS4_ACCESS_LOOKUP;
2441 } else {
2442 if (mode & MAY_WRITE)
2443 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2444 if (mode & MAY_EXEC)
2445 args.access |= NFS4_ACCESS_EXECUTE;
2446 }
c407d41a
TM		 2447
2448 res.fattr = nfs_alloc_fattr();
2449 if (res.fattr == NULL)
2450 return -ENOMEM;
2451
cccef3b9 2452 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2453 if (!status) {
2454 entry->mask = 0;
2455 if (res.access & NFS4_ACCESS_READ)
2456 entry->mask |= MAY_READ;
2457 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2458 entry->mask |= MAY_WRITE;
2459 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2460 entry->mask |= MAY_EXEC;
c407d41a 2461 nfs_refresh_inode(inode, res.fattr);
1da177e4 2462 }
c407d41a 2463 nfs_free_fattr(res.fattr);
1da177e4
LT		 2464 return status;
2465}
2466
2467static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2468{
2469 struct nfs4_exception exception = { };
2470 int err;
2471 do {
2472 err = nfs4_handle_exception(NFS_SERVER(inode),
2473 _nfs4_proc_access(inode, entry),
2474 &exception);
2475 } while (exception.retry);
2476 return err;
2477}
2478
2479/*
2480 * TODO: For the time being, we don't try to get any attributes
2481 * along with any of the zero-copy operations READ, READDIR,
2482 * READLINK, WRITE.
2483 *
2484 * In the case of the first three, we want to put the GETATTR
2485 * after the read-type operation -- this is because it is hard
2486 * to predict the length of a GETATTR response in v4, and thus
2487 * align the READ data correctly. This means that the GETATTR
2488 * may end up partially falling into the page cache, and we should
2489 * shift it into the 'tail' of the xdr_buf before processing.
2490 * To do this efficiently, we need to know the total length
2491 * of data received, which doesn't seem to be available outside
2492 * of the RPC layer.
2493 *
2494 * In the case of WRITE, we also want to put the GETATTR after
2495 * the operation -- in this case because we want to make sure
2496 * we get the post-operation mtime and size. This means that
2497 * we can't use xdr_encode_pages() as written: we need a variant
2498 * of it which would leave room in the 'tail' iovec.
2499 *
2500 * Both of these changes to the XDR layer would in fact be quite
2501 * minor, but I decided to leave them for a subsequent patch.
2502 */
2503static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2504 unsigned int pgbase, unsigned int pglen)
2505{
2506 struct nfs4_readlink args = {
2507 .fh = NFS_FH(inode),
2508 .pgbase = pgbase,
2509 .pglen = pglen,
2510 .pages = &page,
2511 };
f50c7000 2512 struct nfs4_readlink_res res;
1da177e4
LT		 2513 struct rpc_message msg = {
2514 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2515 .rpc_argp = &args,
f50c7000 2516 .rpc_resp = &res,
1da177e4
LT		 2517 };
2518
cccef3b9 2519 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2520}
2521
2522static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2523 unsigned int pgbase, unsigned int pglen)
2524{
2525 struct nfs4_exception exception = { };
2526 int err;
2527 do {
2528 err = nfs4_handle_exception(NFS_SERVER(inode),
2529 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2530 &exception);
2531 } while (exception.retry);
2532 return err;
2533}
2534
1da177e4
LT		 2535/*
2536 * Got race?
2537 * We will need to arrange for the VFS layer to provide an atomic open.
2538 * Until then, this create/open method is prone to inefficiency and race
2539 * conditions due to the lookup, create, and open VFS calls from sys_open()
2540 * placed on the wire.
2541 *
2542 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2543 * The file will be opened again in the subsequent VFS open call
2544 * (nfs4_proc_file_open).
2545 *
2546 * The open for read will just hang around to be used by any process that
2547 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2548 */
2549
2550static int
2551nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2552 int flags, struct nameidata *nd)
1da177e4 2553{
ad389da7 2554 struct path path = {
4ac91378 2555 .mnt = nd->path.mnt,
ad389da7
TM		 2556 .dentry = dentry,
2557 };
1da177e4
LT		 2558 struct nfs4_state *state;
2559 struct rpc_cred *cred;
dc0b027d 2560 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2561 int status = 0;
2562
98a8e323 2563 cred = rpc_lookup_cred();
1da177e4
LT		 2564 if (IS_ERR(cred)) {
2565 status = PTR_ERR(cred);
2566 goto out;
2567 }
dc0b027d 2568 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2569 d_drop(dentry);
1da177e4
LT		 2570 if (IS_ERR(state)) {
2571 status = PTR_ERR(state);
659bfcd6 2572 goto out_putcred;
1da177e4 2573 }
d4d9cdcb 2574 d_add(dentry, igrab(state->inode));
d75340cc 2575 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
ad389da7 2576 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2577 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2578 else
dc0b027d 2579 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2580out_putcred:
2581 put_rpccred(cred);
1da177e4
LT		 2582out:
2583 return status;
2584}
2585
2586static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2587{
16e42959 2588 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2589 struct nfs_removeargs args = {
1da177e4 2590 .fh = NFS_FH(dir),
4fdc17b2
TM		 2591 .name.len = name->len,
2592 .name.name = name->name,
16e42959
TM		 2593 .bitmask = server->attr_bitmask,
2594 };
4fdc17b2 2595 struct nfs_removeres res = {
16e42959 2596 .server = server,
1da177e4 2597 };
1da177e4 2598 struct rpc_message msg = {
4fdc17b2
TM		 2599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2600 .rpc_argp = &args,
2601 .rpc_resp = &res,
1da177e4 2602 };
d346890b
TM		 2603 int status = -ENOMEM;
2604
2605 res.dir_attr = nfs_alloc_fattr();
2606 if (res.dir_attr == NULL)
2607 goto out;
1da177e4 2608
cccef3b9 2609 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2610 if (status == 0) {
2611 update_changeattr(dir, &res.cinfo);
d346890b 2612 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2613 }
d346890b
TM		 2614 nfs_free_fattr(res.dir_attr);
2615out:
1da177e4
LT		 2616 return status;
2617}
2618
2619static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2620{
2621 struct nfs4_exception exception = { };
2622 int err;
2623 do {
2624 err = nfs4_handle_exception(NFS_SERVER(dir),
2625 _nfs4_proc_remove(dir, name),
2626 &exception);
2627 } while (exception.retry);
2628 return err;
2629}
2630
e4eff1a6 2631static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2632{
e4eff1a6
TM		 2633 struct nfs_server *server = NFS_SERVER(dir);
2634 struct nfs_removeargs *args = msg->rpc_argp;
2635 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2636
a65318bf 2637 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2638 res->server = server;
1da177e4 2639 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2640}
2641
e4eff1a6 2642static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2643{
e4eff1a6
TM		 2644 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2645
472cfbd9 2646 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2647 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2648 return 0;
2649 update_changeattr(dir, &res->cinfo);
d346890b 2650 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2651 return 1;
1da177e4
LT		 2652}
2653
2654static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2655 struct inode *new_dir, struct qstr *new_name)
2656{
6caf2c82 2657 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2658 struct nfs4_rename_arg arg = {
2659 .old_dir = NFS_FH(old_dir),
2660 .new_dir = NFS_FH(new_dir),
2661 .old_name = old_name,
2662 .new_name = new_name,
6caf2c82
TM		 2663 .bitmask = server->attr_bitmask,
2664 };
6caf2c82
TM		 2665 struct nfs4_rename_res res = {
2666 .server = server,
1da177e4 2667 };
1da177e4
LT		 2668 struct rpc_message msg = {
2669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2670 .rpc_argp = &arg,
2671 .rpc_resp = &res,
2672 };
011fff72 2673 int status = -ENOMEM;
1da177e4 2674
011fff72
TM		 2675 res.old_fattr = nfs_alloc_fattr();
2676 res.new_fattr = nfs_alloc_fattr();
2677 if (res.old_fattr == NULL || res.new_fattr == NULL)
2678 goto out;
1da177e4 2679
011fff72 2680 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2681 if (!status) {
2682 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2683 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2684 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2685 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2686 }
011fff72
TM		 2687out:
2688 nfs_free_fattr(res.new_fattr);
2689 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2690 return status;
2691}
2692
2693static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2694 struct inode *new_dir, struct qstr *new_name)
2695{
2696 struct nfs4_exception exception = { };
2697 int err;
2698 do {
2699 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2700 _nfs4_proc_rename(old_dir, old_name,
2701 new_dir, new_name),
2702 &exception);
2703 } while (exception.retry);
2704 return err;
2705}
2706
2707static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2708{
91ba2eee 2709 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2710 struct nfs4_link_arg arg = {
2711 .fh = NFS_FH(inode),
2712 .dir_fh = NFS_FH(dir),
2713 .name = name,
91ba2eee
TM		 2714 .bitmask = server->attr_bitmask,
2715 };
91ba2eee
TM		 2716 struct nfs4_link_res res = {
2717 .server = server,
1da177e4 2718 };
1da177e4
LT		 2719 struct rpc_message msg = {
2720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2721 .rpc_argp = &arg,
91ba2eee 2722 .rpc_resp = &res,
1da177e4 2723 };
136f2627
TM		 2724 int status = -ENOMEM;
2725
2726 res.fattr = nfs_alloc_fattr();
2727 res.dir_attr = nfs_alloc_fattr();
2728 if (res.fattr == NULL || res.dir_attr == NULL)
2729 goto out;
1da177e4 2730
cccef3b9 2731 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2732 if (!status) {
2733 update_changeattr(dir, &res.cinfo);
2734 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2735 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2736 }
136f2627
TM		 2737out:
2738 nfs_free_fattr(res.dir_attr);
2739 nfs_free_fattr(res.fattr);
1da177e4
LT		 2740 return status;
2741}
2742
2743static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2744{
2745 struct nfs4_exception exception = { };
2746 int err;
2747 do {
2748 err = nfs4_handle_exception(NFS_SERVER(inode),
2749 _nfs4_proc_link(inode, dir, name),
2750 &exception);
2751 } while (exception.retry);
2752 return err;
2753}
2754
57dc9a57
TM		 2755struct nfs4_createdata {
2756 struct rpc_message msg;
2757 struct nfs4_create_arg arg;
2758 struct nfs4_create_res res;
2759 struct nfs_fh fh;
2760 struct nfs_fattr fattr;
2761 struct nfs_fattr dir_fattr;
2762};
2763
2764static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2765 struct qstr *name, struct iattr *sattr, u32 ftype)
2766{
2767 struct nfs4_createdata *data;
2768
2769 data = kzalloc(sizeof(*data), GFP_KERNEL);
2770 if (data != NULL) {
2771 struct nfs_server *server = NFS_SERVER(dir);
2772
2773 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2774 data->msg.rpc_argp = &data->arg;
2775 data->msg.rpc_resp = &data->res;
2776 data->arg.dir_fh = NFS_FH(dir);
2777 data->arg.server = server;
2778 data->arg.name = name;
2779 data->arg.attrs = sattr;
2780 data->arg.ftype = ftype;
2781 data->arg.bitmask = server->attr_bitmask;
2782 data->res.server = server;
2783 data->res.fh = &data->fh;
2784 data->res.fattr = &data->fattr;
2785 data->res.dir_fattr = &data->dir_fattr;
2786 nfs_fattr_init(data->res.fattr);
2787 nfs_fattr_init(data->res.dir_fattr);
2788 }
2789 return data;
2790}
2791
2792static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2793{
cccef3b9
AA		 2794 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2795 &data->arg, &data->res, 1);
57dc9a57
TM		 2796 if (status == 0) {
2797 update_changeattr(dir, &data->res.dir_cinfo);
2798 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2799 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2800 }
2801 return status;
2802}
2803
2804static void nfs4_free_createdata(struct nfs4_createdata *data)
2805{
2806 kfree(data);
2807}
2808
4f390c15 2809static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2810 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2811{
57dc9a57
TM		 2812 struct nfs4_createdata *data;
2813 int status = -ENAMETOOLONG;
1da177e4 2814
94a6d753 2815 if (len > NFS4_MAXPATHLEN)
57dc9a57 2816 goto out;
4f390c15 2817
57dc9a57
TM		 2818 status = -ENOMEM;
2819 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2820 if (data == NULL)
2821 goto out;
2822
2823 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2824 data->arg.u.symlink.pages = &page;
2825 data->arg.u.symlink.len = len;
1da177e4 2826
57dc9a57
TM		 2827 status = nfs4_do_create(dir, dentry, data);
2828
2829 nfs4_free_createdata(data);
2830out:
1da177e4
LT		 2831 return status;
2832}
2833
4f390c15 2834static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2835 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2836{
2837 struct nfs4_exception exception = { };
2838 int err;
2839 do {
2840 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2841 _nfs4_proc_symlink(dir, dentry, page,
2842 len, sattr),
1da177e4
LT		 2843 &exception);
2844 } while (exception.retry);
2845 return err;
2846}
2847
2848static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2849 struct iattr *sattr)
2850{
57dc9a57
TM		 2851 struct nfs4_createdata *data;
2852 int status = -ENOMEM;
1da177e4 2853
57dc9a57
TM		 2854 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2855 if (data == NULL)
2856 goto out;
2857
2858 status = nfs4_do_create(dir, dentry, data);
2859
2860 nfs4_free_createdata(data);
2861out:
1da177e4
LT		 2862 return status;
2863}
2864
2865static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2866 struct iattr *sattr)
2867{
2868 struct nfs4_exception exception = { };
2869 int err;
2870 do {
2871 err = nfs4_handle_exception(NFS_SERVER(dir),
2872 _nfs4_proc_mkdir(dir, dentry, sattr),
2873 &exception);
2874 } while (exception.retry);
2875 return err;
2876}
2877
2878static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2879 u64 cookie, struct page *page, unsigned int count, int plus)
2880{
2881 struct inode *dir = dentry->d_inode;
2882 struct nfs4_readdir_arg args = {
2883 .fh = NFS_FH(dir),
2884 .pages = &page,
2885 .pgbase = 0,
2886 .count = count,
96d25e53 2887 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2888 };
2889 struct nfs4_readdir_res res;
2890 struct rpc_message msg = {
2891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2892 .rpc_argp = &args,
2893 .rpc_resp = &res,
2894 .rpc_cred = cred,
2895 };
2896 int status;
2897
3110ff80 2898 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2899 dentry->d_parent->d_name.name,
2900 dentry->d_name.name,
2901 (unsigned long long)cookie);
1da177e4
LT		 2902 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2903 res.pgbase = args.pgbase;
cccef3b9 2904 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2905 if (status == 0)
2906 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2907
2908 nfs_invalidate_atime(dir);
2909
3110ff80 2910 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2911 return status;
2912}
2913
2914static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2915 u64 cookie, struct page *page, unsigned int count, int plus)
2916{
2917 struct nfs4_exception exception = { };
2918 int err;
2919 do {
2920 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2921 _nfs4_proc_readdir(dentry, cred, cookie,
2922 page, count, plus),
2923 &exception);
2924 } while (exception.retry);
2925 return err;
2926}
2927
2928static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2929 struct iattr *sattr, dev_t rdev)
2930{
57dc9a57
TM		 2931 struct nfs4_createdata *data;
2932 int mode = sattr->ia_mode;
2933 int status = -ENOMEM;
1da177e4
LT		 2934
2935 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2936 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2937
2938 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2939 if (data == NULL)
2940 goto out;
2941
1da177e4 2942 if (S_ISFIFO(mode))
57dc9a57 2943 data->arg.ftype = NF4FIFO;
1da177e4 2944 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2945 data->arg.ftype = NF4BLK;
2946 data->arg.u.device.specdata1 = MAJOR(rdev);
2947 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2948 }
2949 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2950 data->arg.ftype = NF4CHR;
2951 data->arg.u.device.specdata1 = MAJOR(rdev);
2952 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2953 }
1da177e4 2954
57dc9a57
TM		 2955 status = nfs4_do_create(dir, dentry, data);
2956
2957 nfs4_free_createdata(data);
2958out:
1da177e4
LT		 2959 return status;
2960}
2961
2962static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2963 struct iattr *sattr, dev_t rdev)
2964{
2965 struct nfs4_exception exception = { };
2966 int err;
2967 do {
2968 err = nfs4_handle_exception(NFS_SERVER(dir),
2969 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2970 &exception);
2971 } while (exception.retry);
2972 return err;
2973}
2974
2975static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2976 struct nfs_fsstat *fsstat)
2977{
2978 struct nfs4_statfs_arg args = {
2979 .fh = fhandle,
2980 .bitmask = server->attr_bitmask,
2981 };
24ad148a
BH		 2982 struct nfs4_statfs_res res = {
2983 .fsstat = fsstat,
2984 };
1da177e4
LT		 2985 struct rpc_message msg = {
2986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2987 .rpc_argp = &args,
24ad148a 2988 .rpc_resp = &res,
1da177e4
LT		 2989 };
2990
0e574af1 2991 nfs_fattr_init(fsstat->fattr);
cccef3b9 2992 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2993}
2994
2995static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2996{
2997 struct nfs4_exception exception = { };
2998 int err;
2999 do {
3000 err = nfs4_handle_exception(server,
3001 _nfs4_proc_statfs(server, fhandle, fsstat),
3002 &exception);
3003 } while (exception.retry);
3004 return err;
3005}
3006
3007static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3008 struct nfs_fsinfo *fsinfo)
3009{
3010 struct nfs4_fsinfo_arg args = {
3011 .fh = fhandle,
3012 .bitmask = server->attr_bitmask,
3013 };
3dda5e43
BH		 3014 struct nfs4_fsinfo_res res = {
3015 .fsinfo = fsinfo,
3016 };
1da177e4
LT		 3017 struct rpc_message msg = {
3018 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3019 .rpc_argp = &args,
3dda5e43 3020 .rpc_resp = &res,
1da177e4
LT		 3021 };
3022
cccef3b9 3023 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3024}
3025
3026static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3027{
3028 struct nfs4_exception exception = { };
3029 int err;
3030
3031 do {
3032 err = nfs4_handle_exception(server,
3033 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3034 &exception);
3035 } while (exception.retry);
3036 return err;
3037}
3038
3039static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3040{
0e574af1 3041 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3042 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3043}
3044
3045static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3046 struct nfs_pathconf *pathconf)
3047{
3048 struct nfs4_pathconf_arg args = {
3049 .fh = fhandle,
3050 .bitmask = server->attr_bitmask,
3051 };
d45b2989
BH		 3052 struct nfs4_pathconf_res res = {
3053 .pathconf = pathconf,
3054 };
1da177e4
LT		 3055 struct rpc_message msg = {
3056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3057 .rpc_argp = &args,
d45b2989 3058 .rpc_resp = &res,
1da177e4
LT		 3059 };
3060
3061 /* None of the pathconf attributes are mandatory to implement */
3062 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3063 memset(pathconf, 0, sizeof(*pathconf));
3064 return 0;
3065 }
3066
0e574af1 3067 nfs_fattr_init(pathconf->fattr);
cccef3b9 3068 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3069}
3070
3071static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3072 struct nfs_pathconf *pathconf)
3073{
3074 struct nfs4_exception exception = { };
3075 int err;
3076
3077 do {
3078 err = nfs4_handle_exception(server,
3079 _nfs4_proc_pathconf(server, fhandle, pathconf),
3080 &exception);
3081 } while (exception.retry);
3082 return err;
3083}
3084
ec06c096 3085static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3086{
ec06c096 3087 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3088
f11c88af
AA		 3089 dprintk("--> %s\n", __func__);
3090
f11c88af
AA		 3091 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3092
9e33bed5 3093 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3094 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3095 return -EAGAIN;
1da177e4 3096 }
8850df99
TM		 3097
3098 nfs_invalidate_atime(data->inode);
1da177e4 3099 if (task->tk_status > 0)
ec06c096
TM		 3100 renew_lease(server, data->timestamp);
3101 return 0;
1da177e4
LT		 3102}
3103
bdc7f021 3104static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3105{
1da177e4 3106 data->timestamp = jiffies;
bdc7f021 3107 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3108}
3109
788e7a89 3110static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3111{
1da177e4
LT		 3112 struct inode *inode = data->inode;
3113
def6ed7e
AA		 3114 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3115 task->tk_status);
3116
9e33bed5 3117 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3118 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3119 return -EAGAIN;
1da177e4 3120 }
4f9838c7 3121 if (task->tk_status >= 0) {
1da177e4 3122 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3123 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3124 }
788e7a89 3125 return 0;
1da177e4
LT		 3126}
3127
bdc7f021 3128static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3129{
bdc7f021
TM		 3130 struct nfs_server *server = NFS_SERVER(data->inode);
3131
a65318bf 3132 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3133 data->res.server = server;
1da177e4
LT		 3134 data->timestamp = jiffies;
3135
bdc7f021 3136 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3137}
3138
788e7a89 3139static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3140{
1da177e4
LT		 3141 struct inode *inode = data->inode;
3142
21d9a851
AA		 3143 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3144 task->tk_status);
9e33bed5 3145 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3146 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3147 return -EAGAIN;
1da177e4 3148 }
9e08a3c5 3149 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3150 return 0;
1da177e4
LT		 3151}
3152
bdc7f021 3153static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3154{
788e7a89 3155 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3156
a65318bf 3157 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3158 data->res.server = server;
bdc7f021 3159 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3160}
3161
9bc4e3ca
CL		 3162struct nfs4_renewdata {
3163 struct nfs_client *client;
3164 unsigned long timestamp;
3165};
3166
1da177e4
LT		 3167/*
3168 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3169 * standalone procedure for queueing an asynchronous RENEW.
3170 */
9bc4e3ca 3171static void nfs4_renew_release(void *calldata)
dc96aef9 3172{
9bc4e3ca
CL		 3173 struct nfs4_renewdata *data = calldata;
3174 struct nfs_client *clp = data->client;
dc96aef9 3175
0851de06
AB		 3176 if (atomic_read(&clp->cl_count) > 1)
3177 nfs4_schedule_state_renewal(clp);
3178 nfs_put_client(clp);
9bc4e3ca 3179 kfree(data);
dc96aef9
AB		 3180}
3181
9bc4e3ca 3182static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3183{
9bc4e3ca
CL		 3184 struct nfs4_renewdata *data = calldata;
3185 struct nfs_client *clp = data->client;
3186 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3187
3188 if (task->tk_status < 0) {
95baa25c
TM		 3189 /* Unless we're shutting down, schedule state recovery! */
3190 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3191 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3192 return;
3193 }
3194 spin_lock(&clp->cl_lock);
3195 if (time_before(clp->cl_last_renewal,timestamp))
3196 clp->cl_last_renewal = timestamp;
3197 spin_unlock(&clp->cl_lock);
3198}
3199
963d8fe5
TM		 3200static const struct rpc_call_ops nfs4_renew_ops = {
3201 .rpc_call_done = nfs4_renew_done,
dc96aef9 3202 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3203};
3204
adfa6f98 3205int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3206{
3207 struct rpc_message msg = {
3208 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3209 .rpc_argp = clp,
b4454fe1 3210 .rpc_cred = cred,
1da177e4 3211 };
9bc4e3ca 3212 struct nfs4_renewdata *data;
1da177e4 3213
0851de06
AB		 3214 if (!atomic_inc_not_zero(&clp->cl_count))
3215 return -EIO;
9bc4e3ca
CL		 3216 data = kmalloc(sizeof(*data), GFP_KERNEL);
3217 if (data == NULL)
3218 return -ENOMEM;
3219 data->client = clp;
3220 data->timestamp = jiffies;
1da177e4 3221 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3222 &nfs4_renew_ops, data);
1da177e4
LT		 3223}
3224
adfa6f98 3225int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3226{
3227 struct rpc_message msg = {
3228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3229 .rpc_argp = clp,
b4454fe1 3230 .rpc_cred = cred,
1da177e4
LT		 3231 };
3232 unsigned long now = jiffies;
3233 int status;
3234
3235 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3236 if (status < 0)
3237 return status;
3238 spin_lock(&clp->cl_lock);
3239 if (time_before(clp->cl_last_renewal,now))
3240 clp->cl_last_renewal = now;
3241 spin_unlock(&clp->cl_lock);
3242 return 0;
3243}
3244
aa1870af
BF		 3245static inline int nfs4_server_supports_acls(struct nfs_server *server)
3246{
3247 return (server->caps & NFS_CAP_ACLS)
3248 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3249 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3250}
3251
3252/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3253 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3254 * the stack.
3255 */
3256#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3257
3258static void buf_to_pages(const void *buf, size_t buflen,
3259 struct page **pages, unsigned int *pgbase)
3260{
3261 const void *p = buf;
3262
3263 *pgbase = offset_in_page(buf);
3264 p -= *pgbase;
3265 while (p < buf + buflen) {
3266 *(pages++) = virt_to_page(p);
3267 p += PAGE_CACHE_SIZE;
3268 }
3269}
3270
e50a1c2e
BF		 3271struct nfs4_cached_acl {
3272 int cached;
3273 size_t len;
3e9d4154 3274 char data[0];
e50a1c2e
BF		 3275};
3276
3277static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3278{
3279 struct nfs_inode *nfsi = NFS_I(inode);
3280
3281 spin_lock(&inode->i_lock);
3282 kfree(nfsi->nfs4_acl);
3283 nfsi->nfs4_acl = acl;
3284 spin_unlock(&inode->i_lock);
3285}
3286
3287static void nfs4_zap_acl_attr(struct inode *inode)
3288{
3289 nfs4_set_cached_acl(inode, NULL);
3290}
3291
3292static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3293{
3294 struct nfs_inode *nfsi = NFS_I(inode);
3295 struct nfs4_cached_acl *acl;
3296 int ret = -ENOENT;
3297
3298 spin_lock(&inode->i_lock);
3299 acl = nfsi->nfs4_acl;
3300 if (acl == NULL)
3301 goto out;
3302 if (buf == NULL) /* user is just asking for length */
3303 goto out_len;
3304 if (acl->cached == 0)
3305 goto out;
3306 ret = -ERANGE; /* see getxattr(2) man page */
3307 if (acl->len > buflen)
3308 goto out;
3309 memcpy(buf, acl->data, acl->len);
3310out_len:
3311 ret = acl->len;
3312out:
3313 spin_unlock(&inode->i_lock);
3314 return ret;
3315}
3316
3317static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3318{
3319 struct nfs4_cached_acl *acl;
3320
3321 if (buf && acl_len <= PAGE_SIZE) {
3322 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3323 if (acl == NULL)
3324 goto out;
3325 acl->cached = 1;
3326 memcpy(acl->data, buf, acl_len);
3327 } else {
3328 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3329 if (acl == NULL)
3330 goto out;
3331 acl->cached = 0;
3332 }
3333 acl->len = acl_len;
3334out:
3335 nfs4_set_cached_acl(inode, acl);
3336}
3337
16b4289c 3338static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3339{
aa1870af
BF		 3340 struct page *pages[NFS4ACL_MAXPAGES];
3341 struct nfs_getaclargs args = {
3342 .fh = NFS_FH(inode),
3343 .acl_pages = pages,
3344 .acl_len = buflen,
3345 };
663c79b3
BH		 3346 struct nfs_getaclres res = {
3347 .acl_len = buflen,
3348 };
e50a1c2e 3349 void *resp_buf;
aa1870af
BF		 3350 struct rpc_message msg = {
3351 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3352 .rpc_argp = &args,
663c79b3 3353 .rpc_resp = &res,
aa1870af 3354 };
e50a1c2e 3355 struct page *localpage = NULL;
aa1870af
BF		 3356 int ret;
3357
e50a1c2e
BF		 3358 if (buflen < PAGE_SIZE) {
3359 /* As long as we're doing a round trip to the server anyway,
3360 * let's be prepared for a page of acl data. */
3361 localpage = alloc_page(GFP_KERNEL);
3362 resp_buf = page_address(localpage);
3363 if (localpage == NULL)
3364 return -ENOMEM;
3365 args.acl_pages[0] = localpage;
3366 args.acl_pgbase = 0;
663c79b3 3367 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3368 } else {
3369 resp_buf = buf;
3370 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3371 }
cccef3b9 3372 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3373 if (ret)
3374 goto out_free;
663c79b3
BH		 3375 if (res.acl_len > args.acl_len)
3376 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3377 else
663c79b3 3378 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3379 if (buf) {
3380 ret = -ERANGE;
663c79b3 3381 if (res.acl_len > buflen)
e50a1c2e
BF		 3382 goto out_free;
3383 if (localpage)
663c79b3 3384 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3385 }
663c79b3 3386 ret = res.acl_len;
e50a1c2e
BF		 3387out_free:
3388 if (localpage)
3389 __free_page(localpage);
aa1870af
BF		 3390 return ret;
3391}
3392
16b4289c
TM		 3393static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3394{
3395 struct nfs4_exception exception = { };
3396 ssize_t ret;
3397 do {
3398 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3399 if (ret >= 0)
3400 break;
3401 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3402 } while (exception.retry);
3403 return ret;
3404}
3405
e50a1c2e
BF		 3406static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3407{
3408 struct nfs_server *server = NFS_SERVER(inode);
3409 int ret;
3410
3411 if (!nfs4_server_supports_acls(server))
3412 return -EOPNOTSUPP;
3413 ret = nfs_revalidate_inode(server, inode);
3414 if (ret < 0)
3415 return ret;
3416 ret = nfs4_read_cached_acl(inode, buf, buflen);
3417 if (ret != -ENOENT)
3418 return ret;
3419 return nfs4_get_acl_uncached(inode, buf, buflen);
3420}
3421
16b4289c 3422static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3423{
3424 struct nfs_server *server = NFS_SERVER(inode);
3425 struct page *pages[NFS4ACL_MAXPAGES];
3426 struct nfs_setaclargs arg = {
3427 .fh = NFS_FH(inode),
3428 .acl_pages = pages,
3429 .acl_len = buflen,
3430 };
73c403a9 3431 struct nfs_setaclres res;
4b580ee3
BF		 3432 struct rpc_message msg = {
3433 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3434 .rpc_argp = &arg,
73c403a9 3435 .rpc_resp = &res,
4b580ee3
BF		 3436 };
3437 int ret;
3438
3439 if (!nfs4_server_supports_acls(server))
3440 return -EOPNOTSUPP;
642ac549 3441 nfs_inode_return_delegation(inode);
4b580ee3 3442 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3443 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3444 nfs_access_zap_cache(inode);
3445 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3446 return ret;
3447}
3448
16b4289c
TM		 3449static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3450{
3451 struct nfs4_exception exception = { };
3452 int err;
3453 do {
3454 err = nfs4_handle_exception(NFS_SERVER(inode),
3455 __nfs4_proc_set_acl(inode, buf, buflen),
3456 &exception);
3457 } while (exception.retry);
3458 return err;
3459}
3460
1da177e4 3461static int
8328d59f 3462_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3463{
1da177e4
LT		 3464 if (!clp || task->tk_status >= 0)
3465 return 0;
3466 switch(task->tk_status) {
9e33bed5
TM		 3467 case -NFS4ERR_ADMIN_REVOKED:
3468 case -NFS4ERR_BAD_STATEID:
3469 case -NFS4ERR_OPENMODE:
3470 if (state == NULL)
3471 break;
3472 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3473 goto do_state_recovery;
1da177e4 3474 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3475 if (state == NULL)
3476 break;
3477 nfs4_state_mark_reclaim_reboot(clp, state);
3478 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3479 case -NFS4ERR_EXPIRED:
a2c0b9e2 3480 goto do_state_recovery;
4745e315
AA		 3481#if defined(CONFIG_NFS_V4_1)
3482 case -NFS4ERR_BADSESSION:
3483 case -NFS4ERR_BADSLOT:
3484 case -NFS4ERR_BAD_HIGH_SLOT:
3485 case -NFS4ERR_DEADSESSION:
3486 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3487 case -NFS4ERR_SEQ_FALSE_RETRY:
3488 case -NFS4ERR_SEQ_MISORDERED:
3489 dprintk("%s ERROR %d, Reset session\n", __func__,
3490 task->tk_status);
0b9e2d41 3491 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3492 task->tk_status = 0;
3493 return -EAGAIN;
3494#endif /* CONFIG_NFS_V4_1 */
1da177e4 3495 case -NFS4ERR_DELAY:
8328d59f
AA		 3496 if (server)
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
8328d59f
AA		 3518static int
3519nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3520{
3521 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3522}
3523
bb8b27e5
TM		 3524int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3525 unsigned short port, struct rpc_cred *cred,
3526 struct nfs4_setclientid_res *res)
1da177e4
LT		 3527{
3528 nfs4_verifier sc_verifier;
3529 struct nfs4_setclientid setclientid = {
3530 .sc_verifier = &sc_verifier,
3531 .sc_prog = program,
3532 };
3533 struct rpc_message msg = {
3534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3535 .rpc_argp = &setclientid,
bb8b27e5 3536 .rpc_resp = res,
286d7d6a 3537 .rpc_cred = cred,
1da177e4 3538 };
bc4785cd 3539 __be32 *p;
1da177e4
LT		 3540 int loop = 0;
3541 int status;
3542
bc4785cd 3543 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3544 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3545 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3546
3547 for(;;) {
3548 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3549 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3550 clp->cl_ipaddr,
3551 rpc_peeraddr2str(clp->cl_rpcclient,
3552 RPC_DISPLAY_ADDR),
69dd716c
TM		 3553 rpc_peeraddr2str(clp->cl_rpcclient,
3554 RPC_DISPLAY_PROTO),
78ea323b 3555 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3556 clp->cl_id_uniquifier);
3557 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3558 sizeof(setclientid.sc_netid),
3559 rpc_peeraddr2str(clp->cl_rpcclient,
3560 RPC_DISPLAY_NETID));
1da177e4 3561 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3562 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3563 clp->cl_ipaddr, port >> 8, port & 255);
3564
3565 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3566 if (status != -NFS4ERR_CLID_INUSE)
3567 break;
3568 if (signalled())
3569 break;
3570 if (loop++ & 1)
3571 ssleep(clp->cl_lease_time + 1);
3572 else
3573 if (++clp->cl_id_uniquifier == 0)
3574 break;
3575 }
3576 return status;
3577}
3578
bb8b27e5
TM		 3579static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3580 struct nfs4_setclientid_res *arg,
3581 struct rpc_cred *cred)
1da177e4
LT		 3582{
3583 struct nfs_fsinfo fsinfo;
3584 struct rpc_message msg = {
3585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3586 .rpc_argp = arg,
1da177e4 3587 .rpc_resp = &fsinfo,
286d7d6a 3588 .rpc_cred = cred,
1da177e4
LT		 3589 };
3590 unsigned long now;
3591 int status;
3592
3593 now = jiffies;
3594 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3595 if (status == 0) {
3596 spin_lock(&clp->cl_lock);
3597 clp->cl_lease_time = fsinfo.lease_time * HZ;
3598 clp->cl_last_renewal = now;
3599 spin_unlock(&clp->cl_lock);
3600 }
3601 return status;
3602}
3603
bb8b27e5
TM		 3604int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3605 struct nfs4_setclientid_res *arg,
3606 struct rpc_cred *cred)
51581f3b 3607{
77e03677 3608 long timeout = 0;
51581f3b
TM		 3609 int err;
3610 do {
bb8b27e5 3611 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3612 switch (err) {
3613 case 0:
3614 return err;
3615 case -NFS4ERR_RESOURCE:
3616 /* The IBM lawyers misread another document! */
3617 case -NFS4ERR_DELAY:
2c643488 3618 case -EKEYEXPIRED:
51581f3b
TM		 3619 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3620 }
3621 } while (err == 0);
3622 return err;
3623}
3624
fe650407
TM		 3625struct nfs4_delegreturndata {
3626 struct nfs4_delegreturnargs args;
fa178f29 3627 struct nfs4_delegreturnres res;
fe650407
TM		 3628 struct nfs_fh fh;
3629 nfs4_stateid stateid;
26e976a8 3630 unsigned long timestamp;
fa178f29 3631 struct nfs_fattr fattr;
fe650407
TM		 3632 int rpc_status;
3633};
3634
fe650407
TM		 3635static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3636{
3637 struct nfs4_delegreturndata *data = calldata;
938e1010 3638
d61e612a
TM		 3639 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3640 task->tk_status);
938e1010 3641
79708861
RL		 3642 switch (task->tk_status) {
3643 case -NFS4ERR_STALE_STATEID:
3644 case -NFS4ERR_EXPIRED:
3645 case 0:
fa178f29 3646 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3647 break;
3648 default:
3649 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3650 -EAGAIN) {
3651 nfs_restart_rpc(task, data->res.server->nfs_client);
3652 return;
3653 }
3654 }
3655 data->rpc_status = task->tk_status;
fe650407
TM		 3656}
3657
3658static void nfs4_delegreturn_release(void *calldata)
3659{
fe650407
TM		 3660 kfree(calldata);
3661}
3662
938e1010
AA		 3663#if defined(CONFIG_NFS_V4_1)
3664static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3665{
3666 struct nfs4_delegreturndata *d_data;
3667
3668 d_data = (struct nfs4_delegreturndata *)data;
3669
3670 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3671 &d_data->args.seq_args,
3672 &d_data->res.seq_res, 1, task))
3673 return;
3674 rpc_call_start(task);
3675}
3676#endif /* CONFIG_NFS_V4_1 */
3677
c8d149f3 3678static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3679#if defined(CONFIG_NFS_V4_1)
3680 .rpc_call_prepare = nfs4_delegreturn_prepare,
3681#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3682 .rpc_call_done = nfs4_delegreturn_done,
3683 .rpc_release = nfs4_delegreturn_release,
3684};
3685
e6f81075 3686static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3687{
3688 struct nfs4_delegreturndata *data;
fa178f29 3689 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3690 struct rpc_task *task;
5138fde0
TM		 3691 struct rpc_message msg = {
3692 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3693 .rpc_cred = cred,
3694 };
c970aa85
TM		 3695 struct rpc_task_setup task_setup_data = {
3696 .rpc_client = server->client,
5138fde0 3697 .rpc_message = &msg,
c970aa85
TM		 3698 .callback_ops = &nfs4_delegreturn_ops,
3699 .flags = RPC_TASK_ASYNC,
3700 };
e6f81075 3701 int status = 0;
fe650407 3702
8535b2be 3703 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3704 if (data == NULL)
3705 return -ENOMEM;
3706 data->args.fhandle = &data->fh;
3707 data->args.stateid = &data->stateid;
fa178f29 3708 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3709 nfs_copy_fh(&data->fh, NFS_FH(inode));
3710 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3711 data->res.fattr = &data->fattr;
3712 data->res.server = server;
5f7dbd5c 3713 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3714 nfs_fattr_init(data->res.fattr);
26e976a8 3715 data->timestamp = jiffies;
fe650407
TM		 3716 data->rpc_status = 0;
3717
c970aa85 3718 task_setup_data.callback_data = data;
5138fde0
TM		 3719 msg.rpc_argp = &data->args,
3720 msg.rpc_resp = &data->res,
c970aa85 3721 task = rpc_run_task(&task_setup_data);
7a1218a2 3722 if (IS_ERR(task))
fe650407 3723 return PTR_ERR(task);
e6f81075
TM		 3724 if (!issync)
3725 goto out;
fe650407 3726 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3727 if (status != 0)
3728 goto out;
3729 status = data->rpc_status;
3730 if (status != 0)
3731 goto out;
3732 nfs_refresh_inode(inode, &data->fattr);
3733out:
e6b3c4db 3734 rpc_put_task(task);
fe650407 3735 return status;
1da177e4
LT		 3736}
3737
e6f81075 3738int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3739{
3740 struct nfs_server *server = NFS_SERVER(inode);
3741 struct nfs4_exception exception = { };
3742 int err;
3743 do {
e6f81075 3744 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3745 switch (err) {
3746 case -NFS4ERR_STALE_STATEID:
3747 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3748 case 0:
3749 return 0;
3750 }
3751 err = nfs4_handle_exception(server, err, &exception);
3752 } while (exception.retry);
3753 return err;
3754}
3755
3756#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3757#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3758
3759/*
3760 * sleep, with exponential backoff, and retry the LOCK operation.
3761 */
3762static unsigned long
3763nfs4_set_lock_task_retry(unsigned long timeout)
3764{
150030b7 3765 schedule_timeout_killable(timeout);
1da177e4
LT		 3766 timeout <<= 1;
3767 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3768 return NFS4_LOCK_MAXTIMEOUT;
3769 return timeout;
3770}
3771
1da177e4
LT		 3772static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3773{
3774 struct inode *inode = state->inode;
3775 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3776 struct nfs_client *clp = server->nfs_client;
911d1aaf 3777 struct nfs_lockt_args arg = {
1da177e4 3778 .fh = NFS_FH(inode),
911d1aaf 3779 .fl = request,
1da177e4 3780 };
911d1aaf
TM		 3781 struct nfs_lockt_res res = {
3782 .denied = request,
1da177e4
LT		 3783 };
3784 struct rpc_message msg = {
3785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3786 .rpc_argp = &arg,
3787 .rpc_resp = &res,
3788 .rpc_cred = state->owner->so_cred,
3789 };
1da177e4
LT		 3790 struct nfs4_lock_state *lsp;
3791 int status;
3792
911d1aaf 3793 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3794 status = nfs4_set_lock_state(state, request);
3795 if (status != 0)
3796 goto out;
3797 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3798 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3799 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3800 switch (status) {
3801 case 0:
3802 request->fl_type = F_UNLCK;
3803 break;
3804 case -NFS4ERR_DENIED:
3805 status = 0;
1da177e4 3806 }
70cc6487 3807 request->fl_ops->fl_release_private(request);
8d0a8a9d 3808out:
1da177e4
LT		 3809 return status;
3810}
3811
3812static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3813{
3814 struct nfs4_exception exception = { };
3815 int err;
3816
3817 do {
3818 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3819 _nfs4_proc_getlk(state, cmd, request),
3820 &exception);
3821 } while (exception.retry);
3822 return err;
3823}
3824
3825static int do_vfs_lock(struct file *file, struct file_lock *fl)
3826{
3827 int res = 0;
3828 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3829 case FL_POSIX:
3830 res = posix_lock_file_wait(file, fl);
3831 break;
3832 case FL_FLOCK:
3833 res = flock_lock_file_wait(file, fl);
3834 break;
3835 default:
3836 BUG();
3837 }
1da177e4
LT		 3838 return res;
3839}
3840
faf5f49c 3841struct nfs4_unlockdata {
911d1aaf
TM		 3842 struct nfs_locku_args arg;
3843 struct nfs_locku_res res;
faf5f49c
TM		 3844 struct nfs4_lock_state *lsp;
3845 struct nfs_open_context *ctx;
911d1aaf
TM		 3846 struct file_lock fl;
3847 const struct nfs_server *server;
26e976a8 3848 unsigned long timestamp;
faf5f49c
TM		 3849};
3850
911d1aaf
TM		 3851static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3852 struct nfs_open_context *ctx,
3853 struct nfs4_lock_state *lsp,
3854 struct nfs_seqid *seqid)
3855{
3856 struct nfs4_unlockdata *p;
3857 struct inode *inode = lsp->ls_state->inode;
3858
8535b2be 3859 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3860 if (p == NULL)
3861 return NULL;
3862 p->arg.fh = NFS_FH(inode);
3863 p->arg.fl = &p->fl;
3864 p->arg.seqid = seqid;
c1d51931 3865 p->res.seqid = seqid;
5f7dbd5c 3866 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3867 p->arg.stateid = &lsp->ls_stateid;
3868 p->lsp = lsp;
3869 atomic_inc(&lsp->ls_count);
3870 /* Ensure we don't close file until we're done freeing locks! */
3871 p->ctx = get_nfs_open_context(ctx);
3872 memcpy(&p->fl, fl, sizeof(p->fl));
3873 p->server = NFS_SERVER(inode);
3874 return p;
3875}
3876
06f814a3 3877static void nfs4_locku_release_calldata(void *data)
faf5f49c 3878{
963d8fe5 3879 struct nfs4_unlockdata *calldata = data;
911d1aaf 3880 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3881 nfs4_put_lock_state(calldata->lsp);
3882 put_nfs_open_context(calldata->ctx);
3883 kfree(calldata);
faf5f49c
TM		 3884}
3885
963d8fe5 3886static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3887{
963d8fe5 3888 struct nfs4_unlockdata *calldata = data;
faf5f49c 3889
a893693c
AA		 3890 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3891 task->tk_status);
06f814a3
TM		 3892 if (RPC_ASSASSINATED(task))
3893 return;
faf5f49c
TM		 3894 switch (task->tk_status) {
3895 case 0:
3896 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3897 calldata->res.stateid.data,
faf5f49c 3898 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3899 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3900 break;
9e33bed5
TM		 3901 case -NFS4ERR_BAD_STATEID:
3902 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3903 case -NFS4ERR_STALE_STATEID:
3904 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3905 break;
3906 default:
9e33bed5 3907 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3908 nfs_restart_rpc(task,
d61e612a 3909 calldata->server->nfs_client);
faf5f49c 3910 }
faf5f49c
TM		 3911}
3912
4ce70ada 3913static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3914{
4ce70ada 3915 struct nfs4_unlockdata *calldata = data;
faf5f49c 3916
911d1aaf 3917 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3918 return;
3919 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3920 /* Note: exit _without_ running nfs4_locku_done */
3921 task->tk_action = NULL;
faf5f49c
TM		 3922 return;
3923 }
26e976a8 3924 calldata->timestamp = jiffies;
a893693c
AA		 3925 if (nfs4_setup_sequence(calldata->server->nfs_client,
3926 &calldata->arg.seq_args,
3927 &calldata->res.seq_res, 1, task))
3928 return;
5138fde0 3929 rpc_call_start(task);
faf5f49c
TM		 3930}
3931
963d8fe5 3932static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3933 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3934 .rpc_call_done = nfs4_locku_done,
06f814a3 3935 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3936};
3937
a5d16a4d
TM		 3938static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3939 struct nfs_open_context *ctx,
3940 struct nfs4_lock_state *lsp,
3941 struct nfs_seqid *seqid)
3942{
3943 struct nfs4_unlockdata *data;
5138fde0
TM		 3944 struct rpc_message msg = {
3945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3946 .rpc_cred = ctx->cred,
3947 };
c970aa85
TM		 3948 struct rpc_task_setup task_setup_data = {
3949 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3950 .rpc_message = &msg,
c970aa85 3951 .callback_ops = &nfs4_locku_ops,
101070ca 3952 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3953 .flags = RPC_TASK_ASYNC,
3954 };
a5d16a4d 3955
137d6aca
FF		 3956 /* Ensure this is an unlock - when canceling a lock, the
3957 * canceled lock is passed in, and it won't be an unlock.
3958 */
3959 fl->fl_type = F_UNLCK;
3960
a5d16a4d
TM		 3961 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3962 if (data == NULL) {
3963 nfs_free_seqid(seqid);
3964 return ERR_PTR(-ENOMEM);
3965 }
3966
5138fde0
TM		 3967 msg.rpc_argp = &data->arg,
3968 msg.rpc_resp = &data->res,
c970aa85
TM		 3969 task_setup_data.callback_data = data;
3970 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3971}
3972
faf5f49c
TM		 3973static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3974{
19e03c57 3975 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3976 struct nfs_seqid *seqid;
1da177e4 3977 struct nfs4_lock_state *lsp;
06f814a3
TM		 3978 struct rpc_task *task;
3979 int status = 0;
536ff0f8 3980 unsigned char fl_flags = request->fl_flags;
faf5f49c 3981
8d0a8a9d 3982 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3983 /* Unlock _before_ we do the RPC call */
3984 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3985 down_read(&nfsi->rwsem);
3986 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3987 up_read(&nfsi->rwsem);
9b073574 3988 goto out;
19e03c57
TM		 3989 }
3990 up_read(&nfsi->rwsem);
8d0a8a9d 3991 if (status != 0)
9b073574
TM		 3992 goto out;
3993 /* Is this a delegated lock? */
3994 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3995 goto out;
8d0a8a9d 3996 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 3997 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 3998 status = -ENOMEM;
911d1aaf 3999 if (seqid == NULL)
9b073574 4000 goto out;
cd3758e3 4001 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4002 status = PTR_ERR(task);
4003 if (IS_ERR(task))
9b073574 4004 goto out;
a5d16a4d 4005 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4006 rpc_put_task(task);
9b073574 4007out:
536ff0f8 4008 request->fl_flags = fl_flags;
1da177e4
LT		 4009 return status;
4010}
4011
a5d16a4d
TM		 4012struct nfs4_lockdata {
4013 struct nfs_lock_args arg;
4014 struct nfs_lock_res res;
4015 struct nfs4_lock_state *lsp;
4016 struct nfs_open_context *ctx;
4017 struct file_lock fl;
26e976a8 4018 unsigned long timestamp;
a5d16a4d
TM		 4019 int rpc_status;
4020 int cancelled;
66179efe 4021 struct nfs_server *server;
a5d16a4d
TM		 4022};
4023
4024static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4025 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4026 gfp_t gfp_mask)
1da177e4 4027{
a5d16a4d
TM		 4028 struct nfs4_lockdata *p;
4029 struct inode *inode = lsp->ls_state->inode;
1da177e4 4030 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4031
8535b2be 4032 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4033 if (p == NULL)
4034 return NULL;
4035
4036 p->arg.fh = NFS_FH(inode);
4037 p->arg.fl = &p->fl;
8535b2be 4038 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4039 if (p->arg.open_seqid == NULL)
4040 goto out_free;
8535b2be 4041 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4042 if (p->arg.lock_seqid == NULL)
2f74c0a0 4043 goto out_free_seqid;
a5d16a4d 4044 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4045 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4046 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 4047 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 4048 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 4049 p->lsp = lsp;
66179efe 4050 p->server = server;
a5d16a4d
TM		 4051 atomic_inc(&lsp->ls_count);
4052 p->ctx = get_nfs_open_context(ctx);
4053 memcpy(&p->fl, fl, sizeof(p->fl));
4054 return p;
2f74c0a0
TM		 4055out_free_seqid:
4056 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4057out_free:
4058 kfree(p);
4059 return NULL;
4060}
4061
4062static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4063{
4064 struct nfs4_lockdata *data = calldata;
4065 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4066
3110ff80 4067 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4068 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4069 return;
a5d16a4d
TM		 4070 /* Do we need to do an open_to_lock_owner? */
4071 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4072 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4073 return;
a5d16a4d
TM		 4074 data->arg.open_stateid = &state->stateid;
4075 data->arg.new_lock_owner = 1;
c1d51931 4076 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4077 } else
4078 data->arg.new_lock_owner = 0;
26e976a8 4079 data->timestamp = jiffies;
66179efe
AA		 4080 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
4081 &data->res.seq_res, 1, task))
4082 return;
5138fde0 4083 rpc_call_start(task);
3110ff80 4084 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4085}
4086
b257957e
AB		 4087static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4088{
4089 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4090 nfs4_lock_prepare(task, calldata);
4091}
4092
a5d16a4d
TM		 4093static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4094{
4095 struct nfs4_lockdata *data = calldata;
4096
3110ff80 4097 dprintk("%s: begin!\n", __func__);
a5d16a4d 4098
d61e612a
TM		 4099 nfs4_sequence_done(data->server, &data->res.seq_res,
4100 task->tk_status);
66179efe 4101
a5d16a4d
TM		 4102 data->rpc_status = task->tk_status;
4103 if (RPC_ASSASSINATED(task))
4104 goto out;
4105 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4106 if (data->rpc_status == 0)
4107 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4108 else
4109 goto out;
4110 }
4111 if (data->rpc_status == 0) {
4112 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4113 sizeof(data->lsp->ls_stateid.data));
4114 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4115 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4116 }
a5d16a4d 4117out:
3110ff80 4118 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4119}
4120
4121static void nfs4_lock_release(void *calldata)
4122{
4123 struct nfs4_lockdata *data = calldata;
4124
3110ff80 4125 dprintk("%s: begin!\n", __func__);
2f74c0a0 4126 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4127 if (data->cancelled != 0) {
4128 struct rpc_task *task;
4129 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4130 data->arg.lock_seqid);
4131 if (!IS_ERR(task))
e6b3c4db 4132 rpc_put_task(task);
3110ff80 4133 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4134 } else
4135 nfs_free_seqid(data->arg.lock_seqid);
4136 nfs4_put_lock_state(data->lsp);
4137 put_nfs_open_context(data->ctx);
4138 kfree(data);
3110ff80 4139 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4140}
4141
4142static const struct rpc_call_ops nfs4_lock_ops = {
4143 .rpc_call_prepare = nfs4_lock_prepare,
4144 .rpc_call_done = nfs4_lock_done,
4145 .rpc_release = nfs4_lock_release,
4146};
4147
b257957e
AB		 4148static const struct rpc_call_ops nfs4_recover_lock_ops = {
4149 .rpc_call_prepare = nfs4_recover_lock_prepare,
4150 .rpc_call_done = nfs4_lock_done,
4151 .rpc_release = nfs4_lock_release,
4152};
4153
2bee72a6
TM		 4154static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4155{
4156 struct nfs_client *clp = server->nfs_client;
4157 struct nfs4_state *state = lsp->ls_state;
4158
4159 switch (error) {
4160 case -NFS4ERR_ADMIN_REVOKED:
4161 case -NFS4ERR_BAD_STATEID:
4162 case -NFS4ERR_EXPIRED:
4163 if (new_lock_owner != 0 ||
4164 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4165 nfs4_state_mark_reclaim_nograce(clp, state);
4166 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4167 break;
4168 case -NFS4ERR_STALE_STATEID:
4169 if (new_lock_owner != 0 ||
4170 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4171 nfs4_state_mark_reclaim_reboot(clp, state);
4172 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4173 };
4174}
4175
afe6c27c 4176static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4177{
4178 struct nfs4_lockdata *data;
4179 struct rpc_task *task;
5138fde0
TM		 4180 struct rpc_message msg = {
4181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4182 .rpc_cred = state->owner->so_cred,
4183 };
c970aa85
TM		 4184 struct rpc_task_setup task_setup_data = {
4185 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4186 .rpc_message = &msg,
c970aa85 4187 .callback_ops = &nfs4_lock_ops,
101070ca 4188 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4189 .flags = RPC_TASK_ASYNC,
4190 };
a5d16a4d
TM		 4191 int ret;
4192
3110ff80 4193 dprintk("%s: begin!\n", __func__);
cd3758e3 4194 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4195 fl->fl_u.nfs4_fl.owner,
4196 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4197 if (data == NULL)
4198 return -ENOMEM;
4199 if (IS_SETLKW(cmd))
4200 data->arg.block = 1;
b257957e
AB		 4201 if (recovery_type > NFS_LOCK_NEW) {
4202 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4203 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4204 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4205 }
5138fde0
TM		 4206 msg.rpc_argp = &data->arg,
4207 msg.rpc_resp = &data->res,
c970aa85
TM		 4208 task_setup_data.callback_data = data;
4209 task = rpc_run_task(&task_setup_data);
7a1218a2 4210 if (IS_ERR(task))
a5d16a4d 4211 return PTR_ERR(task);
a5d16a4d
TM		 4212 ret = nfs4_wait_for_completion_rpc_task(task);
4213 if (ret == 0) {
4214 ret = data->rpc_status;
2bee72a6
TM		 4215 if (ret)
4216 nfs4_handle_setlk_error(data->server, data->lsp,
4217 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4218 } else
4219 data->cancelled = 1;
e6b3c4db 4220 rpc_put_task(task);
3110ff80 4221 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4222 return ret;
1da177e4
LT		 4223}
4224
4225static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4226{
202b50dc
TM		 4227 struct nfs_server *server = NFS_SERVER(state->inode);
4228 struct nfs4_exception exception = { };
4229 int err;
4230
4231 do {
42a2d13e
TM		 4232 /* Cache the lock if possible... */
4233 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4234 return 0;
afe6c27c 4235 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4236 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4237 break;
4238 nfs4_handle_exception(server, err, &exception);
4239 } while (exception.retry);
4240 return err;
1da177e4
LT		 4241}
4242
4243static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4244{
202b50dc
TM		 4245 struct nfs_server *server = NFS_SERVER(state->inode);
4246 struct nfs4_exception exception = { };
4247 int err;
4248
6bfc93ef
TM		 4249 err = nfs4_set_lock_state(state, request);
4250 if (err != 0)
4251 return err;
202b50dc 4252 do {
42a2d13e
TM		 4253 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4254 return 0;
afe6c27c 4255 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4256 switch (err) {
4257 default:
4258 goto out;
4259 case -NFS4ERR_GRACE:
4260 case -NFS4ERR_DELAY:
2c643488 4261 case -EKEYEXPIRED:
a9ed2e25
TM		 4262 nfs4_handle_exception(server, err, &exception);
4263 err = 0;
4264 }
202b50dc 4265 } while (exception.retry);
a9ed2e25 4266out:
202b50dc 4267 return err;
1da177e4
LT		 4268}
4269
4270static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4271{
19e03c57 4272 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4273 unsigned char fl_flags = request->fl_flags;
8e469ebd 4274 int status = -ENOLCK;
1da177e4 4275
8e469ebd
TM		 4276 if ((fl_flags & FL_POSIX) &&
4277 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4278 goto out;
6bfc93ef 4279 /* Is this a delegated open? */
6bfc93ef
TM		 4280 status = nfs4_set_lock_state(state, request);
4281 if (status != 0)
4282 goto out;
01c3b861
TM		 4283 request->fl_flags |= FL_ACCESS;
4284 status = do_vfs_lock(request->fl_file, request);
4285 if (status < 0)
4286 goto out;
19e03c57 4287 down_read(&nfsi->rwsem);
01c3b861 4288 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4289 /* Yes: cache locks! */
01c3b861 4290 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4291 request->fl_flags = fl_flags & ~FL_SLEEP;
4292 status = do_vfs_lock(request->fl_file, request);
4293 goto out_unlock;
01c3b861 4294 }
afe6c27c 4295 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4296 if (status != 0)
01c3b861 4297 goto out_unlock;
6bfc93ef 4298 /* Note: we always want to sleep here! */
01c3b861 4299 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4300 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4301 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4302out_unlock:
19e03c57 4303 up_read(&nfsi->rwsem);
01c3b861
TM		 4304out:
4305 request->fl_flags = fl_flags;
1da177e4
LT		 4306 return status;
4307}
4308
4309static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4310{
4311 struct nfs4_exception exception = { };
4312 int err;
4313
4314 do {
965b5d67
TM		 4315 err = _nfs4_proc_setlk(state, cmd, request);
4316 if (err == -NFS4ERR_DENIED)
4317 err = -EAGAIN;
1da177e4 4318 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4319 err, &exception);
1da177e4
LT		 4320 } while (exception.retry);
4321 return err;
4322}
4323
4324static int
4325nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4326{
4327 struct nfs_open_context *ctx;
4328 struct nfs4_state *state;
4329 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4330 int status;
4331
4332 /* verify open state */
cd3758e3 4333 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4334 state = ctx->state;
4335
4336 if (request->fl_start < 0 || request->fl_end < 0)
4337 return -EINVAL;
4338
d953126a
TM		 4339 if (IS_GETLK(cmd)) {
4340 if (state != NULL)
4341 return nfs4_proc_getlk(state, F_GETLK, request);
4342 return 0;
4343 }
1da177e4
LT		 4344
4345 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4346 return -EINVAL;
4347
d953126a
TM		 4348 if (request->fl_type == F_UNLCK) {
4349 if (state != NULL)
4350 return nfs4_proc_unlck(state, cmd, request);
4351 return 0;
4352 }
1da177e4 4353
d953126a
TM		 4354 if (state == NULL)
4355 return -ENOLCK;
1da177e4
LT		 4356 do {
4357 status = nfs4_proc_setlk(state, cmd, request);
4358 if ((status != -EAGAIN) || IS_SETLK(cmd))
4359 break;
4360 timeout = nfs4_set_lock_task_retry(timeout);
4361 status = -ERESTARTSYS;
4362 if (signalled())
4363 break;
4364 } while(status < 0);
1da177e4
LT		 4365 return status;
4366}
4367
888e694c
TM		 4368int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4369{
4370 struct nfs_server *server = NFS_SERVER(state->inode);
4371 struct nfs4_exception exception = { };
4372 int err;
4373
4374 err = nfs4_set_lock_state(state, fl);
4375 if (err != 0)
4376 goto out;
4377 do {
afe6c27c 4378 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4379 switch (err) {
4380 default:
4381 printk(KERN_ERR "%s: unhandled error %d.\n",
4382 __func__, err);
4383 case 0:
965b5d67 4384 case -ESTALE:
d5122201
TM		 4385 goto out;
4386 case -NFS4ERR_EXPIRED:
4387 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4388 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4389 case -NFS4ERR_BADSESSION:
4390 case -NFS4ERR_BADSLOT:
4391 case -NFS4ERR_BAD_HIGH_SLOT:
4392 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4393 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4394 nfs4_schedule_state_recovery(server->nfs_client);
4395 goto out;
965b5d67
TM		 4396 case -ERESTARTSYS:
4397 /*
4398 * The show must go on: exit, but mark the
4399 * stateid as needing recovery.
4400 */
4401 case -NFS4ERR_ADMIN_REVOKED:
4402 case -NFS4ERR_BAD_STATEID:
4403 case -NFS4ERR_OPENMODE:
4404 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4405 err = 0;
4406 goto out;
4407 case -ENOMEM:
4408 case -NFS4ERR_DENIED:
4409 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4410 err = 0;
4411 goto out;
d5122201 4412 case -NFS4ERR_DELAY:
2c643488 4413 case -EKEYEXPIRED:
d5122201
TM		 4414 break;
4415 }
888e694c
TM		 4416 err = nfs4_handle_exception(server, err, &exception);
4417 } while (exception.retry);
4418out:
4419 return err;
4420}
6b3b5496 4421
aa1870af
BF		 4422#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4423
6b3b5496
BF		 4424int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4425 size_t buflen, int flags)
4426{
4b580ee3
BF		 4427 struct inode *inode = dentry->d_inode;
4428
4429 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4430 return -EOPNOTSUPP;
4431
4b580ee3 4432 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4433}
4434
4435/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4436 * and that's what we'll do for e.g. user attributes that haven't been set.
4437 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4438 * attributes in kernel-managed attribute namespaces. */
4439ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4440 size_t buflen)
4441{
aa1870af
BF		 4442 struct inode *inode = dentry->d_inode;
4443
4444 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4445 return -EOPNOTSUPP;
4446
4447 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4448}
4449
4450ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4451{
aa1870af 4452 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4453
096455a2
BF		 4454 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4455 return 0;
6b3b5496
BF		 4456 if (buf && buflen < len)
4457 return -ERANGE;
4458 if (buf)
aa1870af
BF		 4459 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4460 return len;
6b3b5496
BF		 4461}
4462
69aaaae1
TM		 4463static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4464{
4465 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4466 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4467 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4468 return;
4469
4470 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4471 NFS_ATTR_FATTR_NLINK;
4472 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4473 fattr->nlink = 2;
4474}
4475
56659e99 4476int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4477 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4478{
4479 struct nfs_server *server = NFS_SERVER(dir);
4480 u32 bitmask[2] = {
361e624f
MN		 4481 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4482 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4483 };
4484 struct nfs4_fs_locations_arg args = {
4485 .dir_fh = NFS_FH(dir),
c228fd3a 4486 .name = name,
683b57b4
TM		 4487 .page = page,
4488 .bitmask = bitmask,
4489 };
22958463
BH		 4490 struct nfs4_fs_locations_res res = {
4491 .fs_locations = fs_locations,
4492 };
683b57b4
TM		 4493 struct rpc_message msg = {
4494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4495 .rpc_argp = &args,
22958463 4496 .rpc_resp = &res,
683b57b4
TM		 4497 };
4498 int status;
4499
3110ff80 4500 dprintk("%s: start\n", __func__);
c228fd3a 4501 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4502 fs_locations->server = server;
830b8e33 4503 fs_locations->nlocations = 0;
cccef3b9 4504 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4505 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4506 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4507 return status;
4508}
4509
557134a3 4510#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4511/*
4512 * nfs4_proc_exchange_id()
4513 *
4514 * Since the clientid has expired, all compounds using sessions
4515 * associated with the stale clientid will be returning
4516 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4517 * be in some phase of session reset.
4518 */
4d643d1d 4519int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4520{
4521 nfs4_verifier verifier;
4522 struct nfs41_exchange_id_args args = {
4523 .client = clp,
4524 .flags = clp->cl_exchange_flags,
4525 };
4526 struct nfs41_exchange_id_res res = {
4527 .client = clp,
4528 };
4529 int status;
4530 struct rpc_message msg = {
4531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4532 .rpc_argp = &args,
4533 .rpc_resp = &res,
4534 .rpc_cred = cred,
4535 };
4536 __be32 *p;
4537
4538 dprintk("--> %s\n", __func__);
4539 BUG_ON(clp == NULL);
a7b72103 4540
7b183d0d
AB		 4541 /* Remove server-only flags */
4542 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4543
99fe60d0
BH		 4544 p = (u32 *)verifier.data;
4545 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4546 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4547 args.verifier = &verifier;
4548
4549 while (1) {
4550 args.id_len = scnprintf(args.id, sizeof(args.id),
4551 "%s/%s %u",
4552 clp->cl_ipaddr,
4553 rpc_peeraddr2str(clp->cl_rpcclient,
4554 RPC_DISPLAY_ADDR),
4555 clp->cl_id_uniquifier);
4556
4557 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4558
180b62a3 4559 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4560 break;
4561
4562 if (signalled())
4563 break;
4564
4565 if (++clp->cl_id_uniquifier == 0)
4566 break;
4567 }
4568
4569 dprintk("<-- %s status= %d\n", __func__, status);
4570 return status;
4571}
4572
2050f0cc
AA		 4573struct nfs4_get_lease_time_data {
4574 struct nfs4_get_lease_time_args *args;
4575 struct nfs4_get_lease_time_res *res;
4576 struct nfs_client *clp;
4577};
4578
4579static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4580 void *calldata)
4581{
4582 int ret;
4583 struct nfs4_get_lease_time_data *data =
4584 (struct nfs4_get_lease_time_data *)calldata;
4585
4586 dprintk("--> %s\n", __func__);
689cf5c1 4587 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4588 /* just setup sequence, do not trigger session recovery
4589 since we're invoked within one */
4590 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4591 &data->args->la_seq_args,
4592 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4593
4594 BUG_ON(ret == -EAGAIN);
4595 rpc_call_start(task);
4596 dprintk("<-- %s\n", __func__);
4597}
4598
4599/*
4600 * Called from nfs4_state_manager thread for session setup, so don't recover
4601 * from sequence operation or clientid errors.
4602 */
4603static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4604{
4605 struct nfs4_get_lease_time_data *data =
4606 (struct nfs4_get_lease_time_data *)calldata;
4607
4608 dprintk("--> %s\n", __func__);
4609 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4610 switch (task->tk_status) {
4611 case -NFS4ERR_DELAY:
4612 case -NFS4ERR_GRACE:
2c643488 4613 case -EKEYEXPIRED:
2050f0cc
AA		 4614 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4615 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4616 task->tk_status = 0;
0110ee15 4617 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4618 return;
4619 }
2050f0cc
AA		 4620 dprintk("<-- %s\n", __func__);
4621}
4622
4623struct rpc_call_ops nfs4_get_lease_time_ops = {
4624 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4625 .rpc_call_done = nfs4_get_lease_time_done,
4626};
4627
4628int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4629{
4630 struct rpc_task *task;
4631 struct nfs4_get_lease_time_args args;
4632 struct nfs4_get_lease_time_res res = {
4633 .lr_fsinfo = fsinfo,
4634 };
4635 struct nfs4_get_lease_time_data data = {
4636 .args = &args,
4637 .res = &res,
4638 .clp = clp,
4639 };
4640 struct rpc_message msg = {
4641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4642 .rpc_argp = &args,
4643 .rpc_resp = &res,
4644 };
4645 struct rpc_task_setup task_setup = {
4646 .rpc_client = clp->cl_rpcclient,
4647 .rpc_message = &msg,
4648 .callback_ops = &nfs4_get_lease_time_ops,
4649 .callback_data = &data
4650 };
4651 int status;
4652
4653 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4654 dprintk("--> %s\n", __func__);
4655 task = rpc_run_task(&task_setup);
4656
4657 if (IS_ERR(task))
4658 status = PTR_ERR(task);
4659 else {
4660 status = task->tk_status;
4661 rpc_put_task(task);
4662 }
4663 dprintk("<-- %s return %d\n", __func__, status);
4664
4665 return status;
4666}
4667
b73dafa7
RL		 4668/*
4669 * Reset a slot table
4670 */
104aeba4
AA		 4671static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4672 int ivalue)
ac72b7b3 4673{
104aeba4 4674 struct nfs4_slot *new = NULL;
b73dafa7 4675 int i;
ac72b7b3
AA		 4676 int ret = 0;
4677
104aeba4
AA		 4678 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4679 max_reqs, tbl->max_slots);
ac72b7b3 4680
104aeba4
AA		 4681 /* Does the newly negotiated max_reqs match the existing slot table? */
4682 if (max_reqs != tbl->max_slots) {
4683 ret = -ENOMEM;
4684 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4685 GFP_NOFS);
104aeba4
AA		 4686 if (!new)
4687 goto out;
4688 ret = 0;
4689 kfree(tbl->slots);
ac72b7b3
AA		 4690 }
4691 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4692 if (new) {
4693 tbl->slots = new;
4694 tbl->max_slots = max_reqs;
4695 }
4696 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4697 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4698 spin_unlock(&tbl->slot_tbl_lock);
4699 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4700 tbl, tbl->slots, tbl->max_slots);
4701out:
4702 dprintk("<-- %s: return %d\n", __func__, ret);
4703 return ret;
4704}
4705
b73dafa7
RL		 4706/*
4707 * Reset the forechannel and backchannel slot tables
4708 */
4709static int nfs4_reset_slot_tables(struct nfs4_session *session)
4710{
4711 int status;
4712
4713 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4714 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4715 if (status)
4716 return status;
4717
4718 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4719 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4720 return status;
4721}
4722
f8625a6a
RL		 4723/* Destroy the slot table */
4724static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4725{
4726 if (session->fc_slot_table.slots != NULL) {
4727 kfree(session->fc_slot_table.slots);
4728 session->fc_slot_table.slots = NULL;
4729 }
4730 if (session->bc_slot_table.slots != NULL) {
4731 kfree(session->bc_slot_table.slots);
4732 session->bc_slot_table.slots = NULL;
4733 }
4734 return;
4735}
4736
fc931582
AA		 4737/*
4738 * Initialize slot table
4739 */
050047ce
RL		 4740static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4741 int max_slots, int ivalue)
fc931582 4742{
fc931582
AA		 4743 struct nfs4_slot *slot;
4744 int ret = -ENOMEM;
4745
4746 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4747
050047ce 4748 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4749
8535b2be 4750 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4751 if (!slot)
4752 goto out;
fc931582
AA		 4753 ret = 0;
4754
4755 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4756 tbl->max_slots = max_slots;
4757 tbl->slots = slot;
4758 tbl->highest_used_slotid = -1; /* no slot is currently used */
4759 spin_unlock(&tbl->slot_tbl_lock);
4760 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4761 tbl, tbl->slots, tbl->max_slots);
4762out:
4763 dprintk("<-- %s: return %d\n", __func__, ret);
4764 return ret;
fc931582
AA		 4765}
4766
050047ce
RL		 4767/*
4768 * Initialize the forechannel and backchannel tables
4769 */
4770static int nfs4_init_slot_tables(struct nfs4_session *session)
4771{
f26468fb
TM		 4772 struct nfs4_slot_table *tbl;
4773 int status = 0;
050047ce 4774
f26468fb
TM		 4775 tbl = &session->fc_slot_table;
4776 if (tbl->slots == NULL) {
4777 status = nfs4_init_slot_table(tbl,
4778 session->fc_attrs.max_reqs, 1);
4779 if (status)
4780 return status;
4781 }
050047ce 4782
f26468fb
TM		 4783 tbl = &session->bc_slot_table;
4784 if (tbl->slots == NULL) {
4785 status = nfs4_init_slot_table(tbl,
4786 session->bc_attrs.max_reqs, 0);
4787 if (status)
4788 nfs4_destroy_slot_tables(session);
4789 }
f8625a6a
RL		 4790
4791 return status;
557134a3
AA		 4792}
4793
4794struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4795{
4796 struct nfs4_session *session;
4797 struct nfs4_slot_table *tbl;
4798
8535b2be 4799 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4800 if (!session)
4801 return NULL;
76db6d95 4802
76db6d95
AA		 4803 /*
4804 * The create session reply races with the server back
4805 * channel probe. Mark the client NFS_CS_SESSION_INITING
4806 * so that the client back channel can find the
4807 * nfs_client struct
4808 */
4809 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4810 init_completion(&session->complete);
76db6d95 4811
557134a3 4812 tbl = &session->fc_slot_table;
9dfdf404 4813 tbl->highest_used_slotid = -1;
557134a3 4814 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4815 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4816
4817 tbl = &session->bc_slot_table;
9dfdf404 4818 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4819 spin_lock_init(&tbl->slot_tbl_lock);
4820 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4821
557134a3
AA		 4822 session->clp = clp;
4823 return session;
4824}
4825
4826void nfs4_destroy_session(struct nfs4_session *session)
4827{
5a0ffe54
AA		 4828 nfs4_proc_destroy_session(session);
4829 dprintk("%s Destroy backchannel for xprt %p\n",
4830 __func__, session->clp->cl_rpcclient->cl_xprt);
4831 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4832 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4833 nfs4_destroy_slot_tables(session);
557134a3
AA		 4834 kfree(session);
4835}
4836
fc931582
AA		 4837/*
4838 * Initialize the values to be used by the client in CREATE_SESSION
4839 * If nfs4_init_session set the fore channel request and response sizes,
4840 * use them.
4841 *
4842 * Set the back channel max_resp_sz_cached to zero to force the client to
4843 * always set csa_cachethis to FALSE because the current implementation
4844 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4845 */
4846static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4847{
4848 struct nfs4_session *session = args->client->cl_session;
4849 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4850 mxresp_sz = session->fc_attrs.max_resp_sz;
4851
4852 if (mxrqst_sz == 0)
4853 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4854 if (mxresp_sz == 0)
4855 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4856 /* Fore channel attributes */
4857 args->fc_attrs.headerpadsz = 0;
4858 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4859 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4860 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4861 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4862
4863 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4864 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4865 __func__,
4866 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4867 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4868
4869 /* Back channel attributes */
4870 args->bc_attrs.headerpadsz = 0;
4871 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4872 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4873 args->bc_attrs.max_resp_sz_cached = 0;
4874 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4875 args->bc_attrs.max_reqs = 1;
4876
4877 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4878 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4879 __func__,
4880 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4881 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4882 args->bc_attrs.max_reqs);
4883}
4884
8d35301d
AA		 4885static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4886{
4887 if (rcvd <= sent)
4888 return 0;
4889 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4890 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4891 return -EINVAL;
4892}
4893
4894#define _verify_fore_channel_attr(_name_) \
4895 _verify_channel_attr("fore", #_name_, \
4896 args->fc_attrs._name_, \
4897 session->fc_attrs._name_)
4898
4899#define _verify_back_channel_attr(_name_) \
4900 _verify_channel_attr("back", #_name_, \
4901 args->bc_attrs._name_, \
4902 session->bc_attrs._name_)
4903
4904/*
4905 * The server is not allowed to increase the fore channel header pad size,
4906 * maximum response size, or maximum number of operations.
4907 *
4908 * The back channel attributes are only negotiatied down: We send what the
4909 * (back channel) server insists upon.
4910 */
4911static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4912 struct nfs4_session *session)
4913{
4914 int ret = 0;
4915
4916 ret |= _verify_fore_channel_attr(headerpadsz);
4917 ret |= _verify_fore_channel_attr(max_resp_sz);
4918 ret |= _verify_fore_channel_attr(max_ops);
4919
4920 ret |= _verify_back_channel_attr(headerpadsz);
4921 ret |= _verify_back_channel_attr(max_rqst_sz);
4922 ret |= _verify_back_channel_attr(max_resp_sz);
4923 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4924 ret |= _verify_back_channel_attr(max_ops);
4925 ret |= _verify_back_channel_attr(max_reqs);
4926
4927 return ret;
4928}
4929
fc931582
AA		 4930static int _nfs4_proc_create_session(struct nfs_client *clp)
4931{
4932 struct nfs4_session *session = clp->cl_session;
4933 struct nfs41_create_session_args args = {
4934 .client = clp,
4935 .cb_program = NFS4_CALLBACK,
4936 };
4937 struct nfs41_create_session_res res = {
4938 .client = clp,
4939 };
4940 struct rpc_message msg = {
4941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4942 .rpc_argp = &args,
4943 .rpc_resp = &res,
4944 };
4945 int status;
4946
4947 nfs4_init_channel_attrs(&args);
0f91421e 4948 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4949
4950 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4951
8d35301d
AA		 4952 if (!status)
4953 /* Verify the session's negotiated channel_attrs values */
4954 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4955 if (!status) {
4956 /* Increment the clientid slot sequence id */
4957 clp->cl_seqid++;
4958 }
4959
4960 return status;
4961}
4962
4963/*
4964 * Issues a CREATE_SESSION operation to the server.
4965 * It is the responsibility of the caller to verify the session is
4966 * expired before calling this routine.
4967 */
f26468fb 4968int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4969{
4970 int status;
4971 unsigned *ptr;
fc931582
AA		 4972 struct nfs4_session *session = clp->cl_session;
4973
4974 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4975
4976 status = _nfs4_proc_create_session(clp);
4977 if (status)
4978 goto out;
4979
f26468fb
TM		 4980 /* Init and reset the fore channel */
4981 status = nfs4_init_slot_tables(session);
4982 dprintk("slot table initialization returned %d\n", status);
4983 if (status)
4984 goto out;
4985 status = nfs4_reset_slot_tables(session);
4986 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4987 if (status)
4988 goto out;
4989
4990 ptr = (unsigned *)&session->sess_id.data[0];
4991 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4992 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4993out:
4994 dprintk("<-- %s\n", __func__);
4995 return status;
4996}
4997
0f3e66c6
AA		 4998/*
4999 * Issue the over-the-wire RPC DESTROY_SESSION.
5000 * The caller must serialize access to this routine.
5001 */
5002int nfs4_proc_destroy_session(struct nfs4_session *session)
5003{
5004 int status = 0;
5005 struct rpc_message msg;
5006
5007 dprintk("--> nfs4_proc_destroy_session\n");
5008
5009 /* session is still being setup */
5010 if (session->clp->cl_cons_state != NFS_CS_READY)
5011 return status;
5012
5013 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5014 msg.rpc_argp = session;
5015 msg.rpc_resp = NULL;
5016 msg.rpc_cred = NULL;
5017 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5018
5019 if (status)
5020 printk(KERN_WARNING
5021 "Got error %d from the server on DESTROY_SESSION. "
5022 "Session has been destroyed regardless...\n", status);
5023
5024 dprintk("<-- nfs4_proc_destroy_session\n");
5025 return status;
5026}
5027
fccba804
TM		 5028int nfs4_init_session(struct nfs_server *server)
5029{
5030 struct nfs_client *clp = server->nfs_client;
2449ea2e 5031 struct nfs4_session *session;
68bf05ef 5032 unsigned int rsize, wsize;
fccba804
TM		 5033 int ret;
5034
5035 if (!nfs4_has_session(clp))
5036 return 0;
5037
68bf05ef
AA		 5038 rsize = server->rsize;
5039 if (rsize == 0)
5040 rsize = NFS_MAX_FILE_IO_SIZE;
5041 wsize = server->wsize;
5042 if (wsize == 0)
5043 wsize = NFS_MAX_FILE_IO_SIZE;
5044
2449ea2e 5045 session = clp->cl_session;
68bf05ef
AA		 5046 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5047 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5048
fccba804
TM		 5049 ret = nfs4_recover_expired_lease(server);
5050 if (!ret)
5051 ret = nfs4_check_client_ready(clp);
5052 return ret;
5053}
5054
fc01cea9
AA		 5055/*
5056 * Renew the cl_session lease.
5057 */
5058static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5059{
5060 struct nfs4_sequence_args args;
5061 struct nfs4_sequence_res res;
5062
5063 struct rpc_message msg = {
5064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5065 .rpc_argp = &args,
5066 .rpc_resp = &res,
5067 .rpc_cred = cred,
5068 };
5069
5070 args.sa_cache_this = 0;
5071
5072 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
b257957e 5073 &res, args.sa_cache_this, 1);
fc01cea9
AA		 5074}
5075
d5f8d3fe
TM		 5076struct nfs4_sequence_data {
5077 struct nfs_client *clp;
5078 struct nfs4_sequence_args args;
5079 struct nfs4_sequence_res res;
5080};
5081
dc96aef9
AB		 5082static void nfs41_sequence_release(void *data)
5083{
d5f8d3fe
TM		 5084 struct nfs4_sequence_data *calldata = data;
5085 struct nfs_client *clp = calldata->clp;
dc96aef9 5086
7135840f
AB		 5087 if (atomic_read(&clp->cl_count) > 1)
5088 nfs4_schedule_state_renewal(clp);
5089 nfs_put_client(clp);
d5f8d3fe 5090 kfree(calldata);
dc96aef9
AB		 5091}
5092
5093static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5094{
d5f8d3fe
TM		 5095 struct nfs4_sequence_data *calldata = data;
5096 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5097
5098 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
5099
5100 if (task->tk_status < 0) {
5101 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5102 if (atomic_read(&clp->cl_count) == 1)
5103 goto out;
fc01cea9
AA		 5104
5105 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
5106 == -EAGAIN) {
0110ee15 5107 nfs_restart_rpc(task, clp);
fc01cea9
AA		 5108 return;
5109 }
5110 }
fc01cea9 5111 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5112out:
fc01cea9
AA		 5113 dprintk("<-- %s\n", __func__);
5114}
5115
5116static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5117{
d5f8d3fe
TM		 5118 struct nfs4_sequence_data *calldata = data;
5119 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5120 struct nfs4_sequence_args *args;
5121 struct nfs4_sequence_res *res;
5122
fc01cea9
AA		 5123 args = task->tk_msg.rpc_argp;
5124 res = task->tk_msg.rpc_resp;
5125
5126 if (nfs4_setup_sequence(clp, args, res, 0, task))
5127 return;
5128 rpc_call_start(task);
5129}
5130
5131static const struct rpc_call_ops nfs41_sequence_ops = {
5132 .rpc_call_done = nfs41_sequence_call_done,
5133 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5134 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5135};
5136
5137static int nfs41_proc_async_sequence(struct nfs_client *clp,
5138 struct rpc_cred *cred)
5139{
d5f8d3fe 5140 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5141 struct rpc_message msg = {
5142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5143 .rpc_cred = cred,
5144 };
5145
7135840f
AB		 5146 if (!atomic_inc_not_zero(&clp->cl_count))
5147 return -EIO;
d5f8d3fe
TM		 5148 calldata = kmalloc(sizeof(*calldata), GFP_NOFS);
5149 if (calldata == NULL) {
7135840f 5150 nfs_put_client(clp);
fc01cea9
AA		 5151 return -ENOMEM;
5152 }
d5f8d3fe
TM		 5153 calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5154 msg.rpc_argp = &calldata->args;
5155 msg.rpc_resp = &calldata->res;
5156 calldata->clp = clp;
fc01cea9
AA		 5157
5158 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
d5f8d3fe 5159 &nfs41_sequence_ops, calldata);
fc01cea9
AA		 5160}
5161
fce5c838
RL		 5162struct nfs4_reclaim_complete_data {
5163 struct nfs_client *clp;
5164 struct nfs41_reclaim_complete_args arg;
5165 struct nfs41_reclaim_complete_res res;
5166};
5167
5168static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5169{
5170 struct nfs4_reclaim_complete_data *calldata = data;
5171
b257957e 5172 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
fce5c838
RL		 5173 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
5174 &calldata->res.seq_res, 0, task))
5175 return;
5176
5177 rpc_call_start(task);
5178}
5179
5180static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5181{
5182 struct nfs4_reclaim_complete_data *calldata = data;
5183 struct nfs_client *clp = calldata->clp;
5184 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5185
5186 dprintk("--> %s\n", __func__);
5187 nfs41_sequence_done(clp, res, task->tk_status);
5188 switch (task->tk_status) {
5189 case 0:
5190 case -NFS4ERR_COMPLETE_ALREADY:
5191 break;
5192 case -NFS4ERR_BADSESSION:
5193 case -NFS4ERR_DEADSESSION:
5194 /*
5195 * Handle the session error, but do not retry the operation, as
5196 * we have no way of telling whether the clientid had to be
5197 * reset before we got our reply. If reset, a new wave of
5198 * reclaim operations will follow, containing their own reclaim
5199 * complete. We don't want our retry to get on the way of
5200 * recovery by incorrectly indicating to the server that we're
5201 * done reclaiming state since the process had to be restarted.
5202 */
5203 _nfs4_async_handle_error(task, NULL, clp, NULL);
5204 break;
5205 default:
5206 if (_nfs4_async_handle_error(
5207 task, NULL, clp, NULL) == -EAGAIN) {
5208 rpc_restart_call_prepare(task);
5209 return;
5210 }
5211 }
fce5c838
RL		 5212
5213 dprintk("<-- %s\n", __func__);
5214}
5215
5216static void nfs4_free_reclaim_complete_data(void *data)
5217{
5218 struct nfs4_reclaim_complete_data *calldata = data;
5219
5220 kfree(calldata);
5221}
5222
5223static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5224 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5225 .rpc_call_done = nfs4_reclaim_complete_done,
5226 .rpc_release = nfs4_free_reclaim_complete_data,
5227};
5228
5229/*
5230 * Issue a global reclaim complete.
5231 */
5232static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5233{
5234 struct nfs4_reclaim_complete_data *calldata;
5235 struct rpc_task *task;
5236 struct rpc_message msg = {
5237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5238 };
5239 struct rpc_task_setup task_setup_data = {
5240 .rpc_client = clp->cl_rpcclient,
5241 .rpc_message = &msg,
5242 .callback_ops = &nfs4_reclaim_complete_call_ops,
5243 .flags = RPC_TASK_ASYNC,
5244 };
5245 int status = -ENOMEM;
5246
5247 dprintk("--> %s\n", __func__);
8535b2be 5248 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5249 if (calldata == NULL)
5250 goto out;
5251 calldata->clp = clp;
5252 calldata->arg.one_fs = 0;
5253 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5254
5255 msg.rpc_argp = &calldata->arg;
5256 msg.rpc_resp = &calldata->res;
5257 task_setup_data.callback_data = calldata;
5258 task = rpc_run_task(&task_setup_data);
acf82b85 5259 if (IS_ERR(task)) {
fce5c838 5260 status = PTR_ERR(task);
acf82b85
DC		 5261 goto out;
5262 }
fce5c838 5263 rpc_put_task(task);
acf82b85 5264 return 0;
fce5c838
RL		 5265out:
5266 dprintk("<-- %s status=%d\n", __func__, status);
5267 return status;
5268}
557134a3
AA		 5269#endif /* CONFIG_NFS_V4_1 */
5270
591d71cb 5271struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5272 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5273 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5274 .recover_open = nfs4_open_reclaim,
5275 .recover_lock = nfs4_lock_reclaim,
591d71cb 5276 .establish_clid = nfs4_init_clientid,
90a16617 5277 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5278};
5279
591d71cb
AA		 5280#if defined(CONFIG_NFS_V4_1)
5281struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5282 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5283 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5284 .recover_open = nfs4_open_reclaim,
5285 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5286 .establish_clid = nfs41_init_clientid,
b4b82607 5287 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5288 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5289};
5290#endif /* CONFIG_NFS_V4_1 */
5291
5292struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5293 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5294 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5295 .recover_open = nfs4_open_expired,
5296 .recover_lock = nfs4_lock_expired,
5297 .establish_clid = nfs4_init_clientid,
90a16617 5298 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5299};
5300
5301#if defined(CONFIG_NFS_V4_1)
5302struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5303 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5304 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5305 .recover_open = nfs4_open_expired,
5306 .recover_lock = nfs4_lock_expired,
4d643d1d 5307 .establish_clid = nfs41_init_clientid,
b4b82607 5308 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5309};
591d71cb 5310#endif /* CONFIG_NFS_V4_1 */
1da177e4 5311
29fba38b
BH		 5312struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5313 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5314 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5315 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5316};
5317
5318#if defined(CONFIG_NFS_V4_1)
5319struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5320 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5321 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5322 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5323};
5324#endif
5325
5326/*
5327 * Per minor version reboot and network partition recovery ops
5328 */
5329
591d71cb
AA		 5330struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5331 &nfs40_reboot_recovery_ops,
5332#if defined(CONFIG_NFS_V4_1)
5333 &nfs41_reboot_recovery_ops,
5334#endif
5335};
5336
5337struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5338 &nfs40_nograce_recovery_ops,
5339#if defined(CONFIG_NFS_V4_1)
5340 &nfs41_nograce_recovery_ops,
5341#endif
5342};
5343
29fba38b
BH		 5344struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5345 &nfs40_state_renewal_ops,
5346#if defined(CONFIG_NFS_V4_1)
5347 &nfs41_state_renewal_ops,
5348#endif
5349};
5350
92e1d5be 5351static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5352 .permission = nfs_permission,
5353 .getattr = nfs_getattr,
5354 .setattr = nfs_setattr,
5355 .getxattr = nfs4_getxattr,
5356 .setxattr = nfs4_setxattr,
5357 .listxattr = nfs4_listxattr,
5358};
5359
509de811 5360const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5361 .version = 4, /* protocol version */
5362 .dentry_ops = &nfs4_dentry_operations,
5363 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5364 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5365 .getroot = nfs4_proc_get_root,
5366 .getattr = nfs4_proc_getattr,
5367 .setattr = nfs4_proc_setattr,
2b3de441 5368 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5369 .lookup = nfs4_proc_lookup,
5370 .access = nfs4_proc_access,
5371 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5372 .create = nfs4_proc_create,
5373 .remove = nfs4_proc_remove,
5374 .unlink_setup = nfs4_proc_unlink_setup,
5375 .unlink_done = nfs4_proc_unlink_done,
5376 .rename = nfs4_proc_rename,
5377 .link = nfs4_proc_link,
5378 .symlink = nfs4_proc_symlink,
5379 .mkdir = nfs4_proc_mkdir,
5380 .rmdir = nfs4_proc_remove,
5381 .readdir = nfs4_proc_readdir,
5382 .mknod = nfs4_proc_mknod,
5383 .statfs = nfs4_proc_statfs,
5384 .fsinfo = nfs4_proc_fsinfo,
5385 .pathconf = nfs4_proc_pathconf,
e9326dca 5386 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5387 .decode_dirent = nfs4_decode_dirent,
5388 .read_setup = nfs4_proc_read_setup,
ec06c096 5389 .read_done = nfs4_read_done,
1da177e4 5390 .write_setup = nfs4_proc_write_setup,
788e7a89 5391 .write_done = nfs4_write_done,
1da177e4 5392 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5393 .commit_done = nfs4_commit_done,
1da177e4 5394 .lock = nfs4_proc_lock,
e50a1c2e 5395 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5396 .close_context = nfs4_close_context,
1da177e4
LT		 5397};
5398
5399/*
5400 * Local variables:
5401 * c-basic-offset: 8
5402 * End:
5403 */
Clone of davem's net-next-2.6 tree