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NFS: Fix the NFS users of rpc_restart_call()
[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
452e9352 306static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 307{
1da177e4
LT		 308 spin_lock(&clp->cl_lock);
309 if (time_before(clp->cl_last_renewal,timestamp))
310 clp->cl_last_renewal = timestamp;
311 spin_unlock(&clp->cl_lock);
312}
313
452e9352
TM		 314static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
315{
316 do_renew_lease(server->nfs_client, timestamp);
317}
318
cccef3b9
AA		 319#if defined(CONFIG_NFS_V4_1)
320
e2c4ab3c
AA		 321/*
322 * nfs4_free_slot - free a slot and efficiently update slot table.
323 *
324 * freeing a slot is trivially done by clearing its respective bit
325 * in the bitmap.
326 * If the freed slotid equals highest_used_slotid we want to update it
327 * so that the server would be able to size down the slot table if needed,
328 * otherwise we know that the highest_used_slotid is still in use.
329 * When updating highest_used_slotid there may be "holes" in the bitmap
330 * so we need to scan down from highest_used_slotid to 0 looking for the now
331 * highest slotid in use.
332 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 333 *
334 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 335 */
336static void
337nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
338{
339 int slotid = free_slotid;
340
e2c4ab3c
AA		 341 /* clear used bit in bitmap */
342 __clear_bit(slotid, tbl->used_slots);
343
344 /* update highest_used_slotid when it is freed */
345 if (slotid == tbl->highest_used_slotid) {
346 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 347 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 348 tbl->highest_used_slotid = slotid;
349 else
350 tbl->highest_used_slotid = -1;
351 }
e2c4ab3c
AA		 352 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
353 free_slotid, tbl->highest_used_slotid);
354}
355
3bfb0fc5
AB		 356/*
357 * Signal state manager thread if session is drained
358 */
359static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
360{
689cf5c1
AB		 361 struct rpc_task *task;
362
a2118c33 363 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 364 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
365 if (task)
366 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 367 return;
368 }
369
370 if (ses->fc_slot_table.highest_used_slotid != -1)
371 return;
372
373 dprintk("%s COMPLETE: Session Drained\n", __func__);
374 complete(&ses->complete);
375}
376
d185a334 377static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 378{
379 struct nfs4_slot_table *tbl;
380
d185a334 381 tbl = &res->sr_session->fc_slot_table;
13615871 382 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 383 /* just wake up the next guy waiting since
384 * we may have not consumed a slot after all */
691daf3b 385 dprintk("%s: No slot\n", __func__);
35dc1d74 386 return;
13615871 387 }
ea028ac9 388
35dc1d74
TM		 389 spin_lock(&tbl->slot_tbl_lock);
390 nfs4_free_slot(tbl, res->sr_slotid);
d185a334 391 nfs41_check_drain_session_complete(res->sr_session);
35dc1d74
TM		 392 spin_unlock(&tbl->slot_tbl_lock);
393 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 394}
395
14516c3a 396static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 397{
398 unsigned long timestamp;
399 struct nfs4_slot_table *tbl;
400 struct nfs4_slot *slot;
14516c3a 401 struct nfs_client *clp;
b0df806c
AA		 402
403 /*
404 * sr_status remains 1 if an RPC level error occurred. The server
405 * may or may not have processed the sequence operation..
406 * Proceed as if the server received and processed the sequence
407 * operation.
408 */
409 if (res->sr_status == 1)
410 res->sr_status = NFS_OK;
411
412 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
413 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
414 goto out;
415
14516c3a
TM		 416 tbl = &res->sr_session->fc_slot_table;
417 slot = tbl->slots + res->sr_slotid;
418
691daf3b 419 /* Check the SEQUENCE operation status */
14516c3a
TM		 420 switch (res->sr_status) {
421 case 0:
b0df806c
AA		 422 /* Update the slot's sequence and clientid lease timer */
423 ++slot->seq_nr;
424 timestamp = res->sr_renewal_time;
14516c3a 425 clp = res->sr_session->clp;
452e9352 426 do_renew_lease(clp, timestamp);
0629e370 427 /* Check sequence flags */
7135840f
AB		 428 if (atomic_read(&clp->cl_count) > 1)
429 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
14516c3a
TM		 430 break;
431 case -NFS4ERR_DELAY:
432 /* The server detected a resend of the RPC call and
433 * returned NFS4ERR_DELAY as per Section 2.10.6.2
434 * of RFC5661.
435 */
436 dprintk("%s: slot=%d seq=%d: Operation in progress\n",
437 __func__, res->sr_slotid, slot->seq_nr);
438 goto out_retry;
439 default:
440 /* Just update the slot sequence no. */
441 ++slot->seq_nr;
b0df806c
AA		 442 }
443out:
444 /* The session may be reset by one of the error handlers. */
445 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 446 nfs41_sequence_free_slot(res);
14516c3a
TM		 447 return 1;
448out_retry:
d05dd4e9 449 if (!rpc_restart_call(task))
14516c3a
TM		 450 goto out;
451 rpc_delay(task, NFS4_POLL_RETRY_MAX);
452 return 0;
b0df806c
AA		 453}
454
14516c3a
TM		 455static int nfs4_sequence_done(struct rpc_task *task,
456 struct nfs4_sequence_res *res)
df896455 457{
14516c3a
TM		 458 if (res->sr_session == NULL)
459 return 1;
460 return nfs41_sequence_done(task, res);
df896455
TM		 461}
462
510b8175
BH		 463/*
464 * nfs4_find_slot - efficiently look for a free slot
465 *
466 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
467 * If found, we mark the slot as used, update the highest_used_slotid,
468 * and respectively set up the sequence operation args.
469 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 470 *
471 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 472 */
473static u8
40ead580 474nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 475{
476 int slotid;
477 u8 ret_id = NFS4_MAX_SLOT_TABLE;
478 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
479
510b8175
BH		 480 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
481 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
482 tbl->max_slots);
483 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
484 if (slotid >= tbl->max_slots)
485 goto out;
486 __set_bit(slotid, tbl->used_slots);
487 if (slotid > tbl->highest_used_slotid)
488 tbl->highest_used_slotid = slotid;
489 ret_id = slotid;
490out:
491 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
492 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 493 return ret_id;
494}
495
ce5039c1
AA		 496static int nfs41_setup_sequence(struct nfs4_session *session,
497 struct nfs4_sequence_args *args,
498 struct nfs4_sequence_res *res,
499 int cache_reply,
500 struct rpc_task *task)
501{
fbcd4abc
AA		 502 struct nfs4_slot *slot;
503 struct nfs4_slot_table *tbl;
504 u8 slotid;
505
506 dprintk("--> %s\n", __func__);
ce5039c1
AA		 507 /* slot already allocated? */
508 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
509 return 0;
510
ce5039c1 511 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 512 tbl = &session->fc_slot_table;
513
514 spin_lock(&tbl->slot_tbl_lock);
a2118c33 515 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 516 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 517 /*
518 * The state manager will wait until the slot table is empty.
519 * Schedule the reset thread
520 */
05f0d236 521 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 522 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 523 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 524 return -EAGAIN;
b069d94a
AA		 525 }
526
689cf5c1
AB		 527 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
528 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
529 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
530 spin_unlock(&tbl->slot_tbl_lock);
531 dprintk("%s enforce FIFO order\n", __func__);
532 return -EAGAIN;
533 }
534
40ead580 535 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 536 if (slotid == NFS4_MAX_SLOT_TABLE) {
537 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
538 spin_unlock(&tbl->slot_tbl_lock);
539 dprintk("<-- %s: no free slots\n", __func__);
540 return -EAGAIN;
541 }
542 spin_unlock(&tbl->slot_tbl_lock);
543
689cf5c1 544 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 545 slot = tbl->slots + slotid;
99fe60d0 546 args->sa_session = session;
fbcd4abc
AA		 547 args->sa_slotid = slotid;
548 args->sa_cache_this = cache_reply;
549
550 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
551
99fe60d0 552 res->sr_session = session;
fbcd4abc
AA		 553 res->sr_slotid = slotid;
554 res->sr_renewal_time = jiffies;
2a6e26cd 555 res->sr_status_flags = 0;
fbcd4abc
AA		 556 /*
557 * sr_status is only set in decode_sequence, and so will remain
558 * set to 1 if an rpc level failure occurs.
559 */
560 res->sr_status = 1;
ce5039c1
AA		 561 return 0;
562}
563
035168ab 564int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 565 struct nfs4_sequence_args *args,
566 struct nfs4_sequence_res *res,
567 int cache_reply,
568 struct rpc_task *task)
569{
035168ab 570 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 571 int ret = 0;
572
035168ab
TM		 573 if (session == NULL) {
574 args->sa_session = NULL;
575 res->sr_session = NULL;
576 goto out;
577 }
578
ce5039c1 579 dprintk("--> %s clp %p session %p sr_slotid %d\n",
035168ab 580 __func__, session->clp, session, res->sr_slotid);
ce5039c1 581
035168ab 582 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 583 task);
ce5039c1
AA		 584out:
585 dprintk("<-- %s status=%d\n", __func__, ret);
586 return ret;
587}
588
589struct nfs41_call_sync_data {
035168ab 590 const struct nfs_server *seq_server;
ce5039c1
AA		 591 struct nfs4_sequence_args *seq_args;
592 struct nfs4_sequence_res *seq_res;
593 int cache_reply;
594};
595
596static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
597{
598 struct nfs41_call_sync_data *data = calldata;
599
035168ab
TM		 600 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
601
602 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 603 data->seq_res, data->cache_reply, task))
604 return;
605 rpc_call_start(task);
606}
607
b257957e
AB		 608static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
609{
610 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
611 nfs41_call_sync_prepare(task, calldata);
612}
613
69ab40c4
AA		 614static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
615{
616 struct nfs41_call_sync_data *data = calldata;
617
14516c3a 618 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 619}
620
ce5039c1
AA		 621struct rpc_call_ops nfs41_call_sync_ops = {
622 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 623 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 624};
625
b257957e
AB		 626struct rpc_call_ops nfs41_call_priv_sync_ops = {
627 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
628 .rpc_call_done = nfs41_call_sync_done,
629};
630
035168ab 631static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 632 struct rpc_message *msg,
633 struct nfs4_sequence_args *args,
634 struct nfs4_sequence_res *res,
b257957e
AB		 635 int cache_reply,
636 int privileged)
ce5039c1
AA		 637{
638 int ret;
639 struct rpc_task *task;
640 struct nfs41_call_sync_data data = {
035168ab 641 .seq_server = server,
ce5039c1
AA		 642 .seq_args = args,
643 .seq_res = res,
644 .cache_reply = cache_reply,
645 };
646 struct rpc_task_setup task_setup = {
035168ab 647 .rpc_client = server->client,
ce5039c1
AA		 648 .rpc_message = msg,
649 .callback_ops = &nfs41_call_sync_ops,
650 .callback_data = &data
651 };
652
653 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 654 if (privileged)
655 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 656 task = rpc_run_task(&task_setup);
657 if (IS_ERR(task))
658 ret = PTR_ERR(task);
659 else {
660 ret = task->tk_status;
661 rpc_put_task(task);
662 }
663 return ret;
664}
665
cccef3b9
AA		 666int _nfs4_call_sync_session(struct nfs_server *server,
667 struct rpc_message *msg,
668 struct nfs4_sequence_args *args,
669 struct nfs4_sequence_res *res,
670 int cache_reply)
671{
035168ab 672 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 673}
674
df896455 675#else
14516c3a
TM		 676static int nfs4_sequence_done(struct rpc_task *task,
677 struct nfs4_sequence_res *res)
df896455 678{
14516c3a 679 return 1;
df896455 680}
cccef3b9
AA		 681#endif /* CONFIG_NFS_V4_1 */
682
683int _nfs4_call_sync(struct nfs_server *server,
684 struct rpc_message *msg,
685 struct nfs4_sequence_args *args,
686 struct nfs4_sequence_res *res,
687 int cache_reply)
688{
f3752975 689 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 690 return rpc_call_sync(server->client, msg, 0);
691}
692
693#define nfs4_call_sync(server, msg, args, res, cache_reply) \
97dc1359 694 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
cccef3b9
AA		 695 &(res)->seq_res, (cache_reply))
696
38478b24 697static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 698{
38478b24 699 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 700
38478b24 701 spin_lock(&dir->i_lock);
40d24704
TM		 702 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
703 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 704 nfs_force_lookup_revalidate(dir);
40d24704 705 nfsi->change_attr = cinfo->after;
38478b24 706 spin_unlock(&dir->i_lock);
1da177e4
LT		 707}
708
e56e0b78 709struct nfs4_opendata {
c6d00e63 710 struct kref kref;
e56e0b78
TM		 711 struct nfs_openargs o_arg;
712 struct nfs_openres o_res;
cdd4e68b
TM		 713 struct nfs_open_confirmargs c_arg;
714 struct nfs_open_confirmres c_res;
e56e0b78
TM		 715 struct nfs_fattr f_attr;
716 struct nfs_fattr dir_attr;
ad389da7 717 struct path path;
e56e0b78
TM		 718 struct dentry *dir;
719 struct nfs4_state_owner *owner;
aac00a8d 720 struct nfs4_state *state;
e56e0b78 721 struct iattr attrs;
26e976a8 722 unsigned long timestamp;
3e309914 723 unsigned int rpc_done : 1;
24ac23ab
TM		 724 int rpc_status;
725 int cancelled;
e56e0b78
TM		 726};
727
2ced46c2
TM		 728
729static void nfs4_init_opendata_res(struct nfs4_opendata *p)
730{
731 p->o_res.f_attr = &p->f_attr;
732 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 733 p->o_res.seqid = p->o_arg.seqid;
734 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 735 p->o_res.server = p->o_arg.server;
736 nfs_fattr_init(&p->f_attr);
737 nfs_fattr_init(&p->dir_attr);
578e4585 738 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 739}
740
ad389da7 741static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 742 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 743 const struct iattr *attrs,
744 gfp_t gfp_mask)
e56e0b78 745{
ad389da7 746 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 747 struct inode *dir = parent->d_inode;
748 struct nfs_server *server = NFS_SERVER(dir);
749 struct nfs4_opendata *p;
750
8535b2be 751 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 752 if (p == NULL)
753 goto err;
8535b2be 754 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 755 if (p->o_arg.seqid == NULL)
756 goto err_free;
f6948697
AV		 757 path_get(path);
758 p->path = *path;
e56e0b78
TM		 759 p->dir = parent;
760 p->owner = sp;
761 atomic_inc(&sp->so_count);
762 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 763 p->o_arg.open_flags = flags;
764 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 765 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 766 p->o_arg.id = sp->so_owner_id.id;
ad389da7 767 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 768 p->o_arg.server = server;
769 p->o_arg.bitmask = server->attr_bitmask;
770 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 771 if (flags & O_CREAT) {
772 u32 *s;
773
e56e0b78
TM		 774 p->o_arg.u.attrs = &p->attrs;
775 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 776 s = (u32 *) p->o_arg.u.verifier.data;
777 s[0] = jiffies;
778 s[1] = current->pid;
e56e0b78 779 }
cdd4e68b
TM		 780 p->c_arg.fh = &p->o_res.fh;
781 p->c_arg.stateid = &p->o_res.stateid;
782 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 783 nfs4_init_opendata_res(p);
c6d00e63 784 kref_init(&p->kref);
e56e0b78
TM		 785 return p;
786err_free:
787 kfree(p);
788err:
789 dput(parent);
790 return NULL;
791}
792
c6d00e63 793static void nfs4_opendata_free(struct kref *kref)
e56e0b78 794{
c6d00e63
TM		 795 struct nfs4_opendata *p = container_of(kref,
796 struct nfs4_opendata, kref);
797
798 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 799 if (p->state != NULL)
800 nfs4_put_open_state(p->state);
c6d00e63
TM		 801 nfs4_put_state_owner(p->owner);
802 dput(p->dir);
31f31db1 803 path_put(&p->path);
c6d00e63
TM		 804 kfree(p);
805}
806
807static void nfs4_opendata_put(struct nfs4_opendata *p)
808{
809 if (p != NULL)
810 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 811}
812
06f814a3
TM		 813static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
814{
06f814a3
TM		 815 int ret;
816
06f814a3 817 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 818 return ret;
819}
820
dc0b027d 821static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 822{
823 int ret = 0;
dc0b027d
TM		 824
825 if (open_mode & O_EXCL)
826 goto out;
827 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 828 case FMODE_READ:
88069f77
TM		 829 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
830 && state->n_rdonly != 0;
6ee41268
TM		 831 break;
832 case FMODE_WRITE:
88069f77
TM		 833 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
834 && state->n_wronly != 0;
6ee41268
TM		 835 break;
836 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 837 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
838 && state->n_rdwr != 0;
6ee41268 839 }
dc0b027d 840out:
6ee41268
TM		 841 return ret;
842}
843
dc0b027d 844static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 845{
dc0b027d 846 if ((delegation->type & fmode) != fmode)
aac00a8d 847 return 0;
15c831bf 848 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 849 return 0;
b7391f44 850 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 851 return 1;
852}
853
dc0b027d 854static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 855{
dc0b027d 856 switch (fmode) {
e7616923
TM		 857 case FMODE_WRITE:
858 state->n_wronly++;
859 break;
860 case FMODE_READ:
861 state->n_rdonly++;
862 break;
863 case FMODE_READ|FMODE_WRITE:
864 state->n_rdwr++;
865 }
dc0b027d 866 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 867}
868
dc0b027d 869static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 870{
871 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
872 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
873 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 874 switch (fmode) {
003707c7
TM		 875 case FMODE_READ:
876 set_bit(NFS_O_RDONLY_STATE, &state->flags);
877 break;
878 case FMODE_WRITE:
879 set_bit(NFS_O_WRONLY_STATE, &state->flags);
880 break;
881 case FMODE_READ|FMODE_WRITE:
882 set_bit(NFS_O_RDWR_STATE, &state->flags);
883 }
e7616923
TM		 884}
885
dc0b027d 886static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 887{
8bda4e4c 888 write_seqlock(&state->seqlock);
dc0b027d 889 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 890 write_sequnlock(&state->seqlock);
003707c7
TM		 891}
892
dc0b027d 893static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 894{
8bda4e4c
TM		 895 /*
896 * Protect the call to nfs4_state_set_mode_locked and
897 * serialise the stateid update
898 */
899 write_seqlock(&state->seqlock);
003707c7
TM		 900 if (deleg_stateid != NULL) {
901 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
902 set_bit(NFS_DELEGATED_STATE, &state->flags);
903 }
904 if (open_stateid != NULL)
dc0b027d 905 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 906 write_sequnlock(&state->seqlock);
907 spin_lock(&state->owner->so_lock);
dc0b027d 908 update_open_stateflags(state, fmode);
ec073428 909 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 910}
911
dc0b027d 912static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 913{
914 struct nfs_inode *nfsi = NFS_I(state->inode);
915 struct nfs_delegation *deleg_cur;
916 int ret = 0;
917
dc0b027d 918 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 919
920 rcu_read_lock();
921 deleg_cur = rcu_dereference(nfsi->delegation);
922 if (deleg_cur == NULL)
923 goto no_delegation;
924
925 spin_lock(&deleg_cur->lock);
926 if (nfsi->delegation != deleg_cur ||
dc0b027d 927 (deleg_cur->type & fmode) != fmode)
34310430
TM		 928 goto no_delegation_unlock;
929
930 if (delegation == NULL)
931 delegation = &deleg_cur->stateid;
932 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
933 goto no_delegation_unlock;
934
b7391f44 935 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 936 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 937 ret = 1;
938no_delegation_unlock:
939 spin_unlock(&deleg_cur->lock);
940no_delegation:
941 rcu_read_unlock();
942
943 if (!ret && open_stateid != NULL) {
dc0b027d 944 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 945 ret = 1;
946 }
947
948 return ret;
949}
950
951
dc0b027d 952static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 953{
954 struct nfs_delegation *delegation;
955
956 rcu_read_lock();
957 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 958 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 959 rcu_read_unlock();
960 return;
961 }
962 rcu_read_unlock();
963 nfs_inode_return_delegation(inode);
964}
965
6ee41268 966static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 967{
968 struct nfs4_state *state = opendata->state;
969 struct nfs_inode *nfsi = NFS_I(state->inode);
970 struct nfs_delegation *delegation;
dc0b027d
TM		 971 int open_mode = opendata->o_arg.open_flags & O_EXCL;
972 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 973 nfs4_stateid stateid;
974 int ret = -EAGAIN;
975
aac00a8d 976 for (;;) {
dc0b027d 977 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 978 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 979 if (can_open_cached(state, fmode, open_mode)) {
980 update_open_stateflags(state, fmode);
6ee41268 981 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 982 goto out_return_state;
983 }
984 spin_unlock(&state->owner->so_lock);
985 }
34310430
TM		 986 rcu_read_lock();
987 delegation = rcu_dereference(nfsi->delegation);
988 if (delegation == NULL ||
dc0b027d 989 !can_open_delegated(delegation, fmode)) {
34310430 990 rcu_read_unlock();
aac00a8d 991 break;
34310430 992 }
aac00a8d
TM		 993 /* Save the delegation */
994 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
995 rcu_read_unlock();
af22f94a 996 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 997 if (ret != 0)
998 goto out;
999 ret = -EAGAIN;
34310430
TM		 1000
1001 /* Try to update the stateid using the delegation */
dc0b027d 1002 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1003 goto out_return_state;
aac00a8d 1004 }
aac00a8d
TM		 1005out:
1006 return ERR_PTR(ret);
1007out_return_state:
1008 atomic_inc(&state->count);
1009 return state;
1010}
1011
24ac23ab
TM		 1012static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1013{
1014 struct inode *inode;
1015 struct nfs4_state *state = NULL;
003707c7 1016 struct nfs_delegation *delegation;
1b370bc2 1017 int ret;
24ac23ab 1018
aac00a8d 1019 if (!data->rpc_done) {
6ee41268 1020 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1021 goto out;
1022 }
1023
1b370bc2 1024 ret = -EAGAIN;
24ac23ab 1025 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1026 goto err;
24ac23ab 1027 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1028 ret = PTR_ERR(inode);
03f28e3a 1029 if (IS_ERR(inode))
1b370bc2
TM		 1030 goto err;
1031 ret = -ENOMEM;
24ac23ab
TM		 1032 state = nfs4_get_open_state(inode, data->owner);
1033 if (state == NULL)
1b370bc2 1034 goto err_put_inode;
549d6ed5 1035 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1036 int delegation_flags = 0;
1037
003707c7
TM		 1038 rcu_read_lock();
1039 delegation = rcu_dereference(NFS_I(inode)->delegation);
1040 if (delegation)
1041 delegation_flags = delegation->flags;
1042 rcu_read_unlock();
15c831bf 1043 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1044 nfs_inode_set_delegation(state->inode,
1045 data->owner->so_cred,
1046 &data->o_res);
1047 else
1048 nfs_inode_reclaim_delegation(state->inode,
1049 data->owner->so_cred,
1050 &data->o_res);
1051 }
34310430
TM		 1052
1053 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1054 data->o_arg.fmode);
24ac23ab 1055 iput(inode);
aac00a8d 1056out:
24ac23ab 1057 return state;
1b370bc2
TM		 1058err_put_inode:
1059 iput(inode);
1060err:
1061 return ERR_PTR(ret);
24ac23ab
TM		 1062}
1063
864472e9
TM		 1064static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1065{
1066 struct nfs_inode *nfsi = NFS_I(state->inode);
1067 struct nfs_open_context *ctx;
1068
1069 spin_lock(&state->inode->i_lock);
1070 list_for_each_entry(ctx, &nfsi->open_files, list) {
1071 if (ctx->state != state)
1072 continue;
1073 get_nfs_open_context(ctx);
1074 spin_unlock(&state->inode->i_lock);
1075 return ctx;
1076 }
1077 spin_unlock(&state->inode->i_lock);
1078 return ERR_PTR(-ENOENT);
1079}
1080
6f220ed5
TM		 1081static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1082{
1083 struct nfs4_opendata *opendata;
1084
8535b2be 1085 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1086 if (opendata == NULL)
1087 return ERR_PTR(-ENOMEM);
1088 opendata->state = state;
1089 atomic_inc(&state->count);
1090 return opendata;
1091}
1092
dc0b027d 1093static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1094{
2ced46c2 1095 struct nfs4_state *newstate;
864472e9
TM		 1096 int ret;
1097
dc0b027d
TM		 1098 opendata->o_arg.open_flags = 0;
1099 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1100 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1101 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1102 nfs4_init_opendata_res(opendata);
b257957e 1103 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1104 if (ret != 0)
1105 return ret;
2ced46c2 1106 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1107 if (IS_ERR(newstate))
1108 return PTR_ERR(newstate);
dc0b027d 1109 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1110 *res = newstate;
864472e9
TM		 1111 return 0;
1112}
1113
1114static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1115{
864472e9 1116 struct nfs4_state *newstate;
864472e9
TM		 1117 int ret;
1118
1119 /* memory barrier prior to reading state->n_* */
2ced46c2 1120 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1121 smp_rmb();
1122 if (state->n_rdwr != 0) {
2ced46c2 1123 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1124 if (ret != 0)
1125 return ret;
2ced46c2
TM		 1126 if (newstate != state)
1127 return -ESTALE;
864472e9
TM		 1128 }
1129 if (state->n_wronly != 0) {
2ced46c2 1130 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1131 if (ret != 0)
1132 return ret;
2ced46c2
TM		 1133 if (newstate != state)
1134 return -ESTALE;
864472e9
TM		 1135 }
1136 if (state->n_rdonly != 0) {
2ced46c2 1137 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1138 if (ret != 0)
1139 return ret;
2ced46c2
TM		 1140 if (newstate != state)
1141 return -ESTALE;
864472e9 1142 }
1ac7e2fd
TM		 1143 /*
1144 * We may have performed cached opens for all three recoveries.
1145 * Check if we need to update the current stateid.
1146 */
1147 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1148 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1149 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1150 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1151 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1152 write_sequnlock(&state->seqlock);
1ac7e2fd 1153 }
864472e9
TM		 1154 return 0;
1155}
1156
1da177e4
LT		 1157/*
1158 * OPEN_RECLAIM:
1159 * reclaim state on the server after a reboot.
1da177e4 1160 */
539cd03a 1161static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1162{
1ac7e2fd 1163 struct nfs_delegation *delegation;
864472e9 1164 struct nfs4_opendata *opendata;
dc0b027d 1165 fmode_t delegation_type = 0;
1da177e4
LT		 1166 int status;
1167
6f220ed5
TM		 1168 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1169 if (IS_ERR(opendata))
1170 return PTR_ERR(opendata);
864472e9
TM		 1171 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1172 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1173 rcu_read_lock();
1174 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1175 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1176 delegation_type = delegation->type;
1ac7e2fd 1177 rcu_read_unlock();
864472e9
TM		 1178 opendata->o_arg.u.delegation_type = delegation_type;
1179 status = nfs4_open_recover(opendata, state);
c6d00e63 1180 nfs4_opendata_put(opendata);
1da177e4
LT		 1181 return status;
1182}
1183
539cd03a 1184static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1185{
1186 struct nfs_server *server = NFS_SERVER(state->inode);
1187 struct nfs4_exception exception = { };
1188 int err;
1189 do {
539cd03a 1190 err = _nfs4_do_open_reclaim(ctx, state);
2c643488 1191 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 1192 break;
1193 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1194 } while (exception.retry);
1195 return err;
1196}
1197
864472e9
TM		 1198static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1199{
1200 struct nfs_open_context *ctx;
1201 int ret;
1202
1203 ctx = nfs4_state_find_open_context(state);
1204 if (IS_ERR(ctx))
1205 return PTR_ERR(ctx);
539cd03a 1206 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1207 put_nfs_open_context(ctx);
1208 return ret;
1209}
1210
13437e12 1211static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1212{
e56e0b78 1213 struct nfs4_opendata *opendata;
864472e9 1214 int ret;
1da177e4 1215
6f220ed5
TM		 1216 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1217 if (IS_ERR(opendata))
1218 return PTR_ERR(opendata);
e56e0b78 1219 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1220 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1221 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1222 ret = nfs4_open_recover(opendata, state);
c6d00e63 1223 nfs4_opendata_put(opendata);
864472e9 1224 return ret;
1da177e4
LT		 1225}
1226
13437e12 1227int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1228{
1229 struct nfs4_exception exception = { };
539cd03a 1230 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1231 int err;
1232 do {
13437e12 1233 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1234 switch (err) {
1235 case 0:
965b5d67
TM		 1236 case -ENOENT:
1237 case -ESTALE:
1238 goto out;
bcfa49f6
RL		 1239 case -NFS4ERR_BADSESSION:
1240 case -NFS4ERR_BADSLOT:
1241 case -NFS4ERR_BAD_HIGH_SLOT:
1242 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1243 case -NFS4ERR_DEADSESSION:
1244 nfs4_schedule_state_recovery(
1245 server->nfs_client);
1246 goto out;
1da177e4
LT		 1247 case -NFS4ERR_STALE_CLIENTID:
1248 case -NFS4ERR_STALE_STATEID:
1249 case -NFS4ERR_EXPIRED:
1250 /* Don't recall a delegation if it was lost */
7539bbab 1251 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1252 goto out;
1253 case -ERESTARTSYS:
1254 /*
1255 * The show must go on: exit, but mark the
1256 * stateid as needing recovery.
1257 */
1258 case -NFS4ERR_ADMIN_REVOKED:
1259 case -NFS4ERR_BAD_STATEID:
1260 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1261 case -ENOMEM:
1262 err = 0;
1263 goto out;
1da177e4
LT		 1264 }
1265 err = nfs4_handle_exception(server, err, &exception);
1266 } while (exception.retry);
965b5d67 1267out:
1da177e4
LT		 1268 return err;
1269}
1270
cdd4e68b
TM		 1271static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1272{
1273 struct nfs4_opendata *data = calldata;
1274
1275 data->rpc_status = task->tk_status;
26e976a8 1276 if (data->rpc_status == 0) {
cdd4e68b
TM		 1277 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1278 sizeof(data->o_res.stateid.data));
bb22629e 1279 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1280 renew_lease(data->o_res.server, data->timestamp);
3e309914 1281 data->rpc_done = 1;
26e976a8 1282 }
cdd4e68b
TM		 1283}
1284
1285static void nfs4_open_confirm_release(void *calldata)
1286{
1287 struct nfs4_opendata *data = calldata;
1288 struct nfs4_state *state = NULL;
1289
1290 /* If this request hasn't been cancelled, do nothing */
1291 if (data->cancelled == 0)
1292 goto out_free;
1293 /* In case of error, no cleanup! */
3e309914 1294 if (!data->rpc_done)
cdd4e68b 1295 goto out_free;
cdd4e68b 1296 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1297 if (!IS_ERR(state))
dc0b027d 1298 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1299out_free:
c6d00e63 1300 nfs4_opendata_put(data);
cdd4e68b
TM		 1301}
1302
1303static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1304 .rpc_call_done = nfs4_open_confirm_done,
1305 .rpc_release = nfs4_open_confirm_release,
1306};
1307
1308/*
1309 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1310 */
1311static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1312{
1313 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1314 struct rpc_task *task;
5138fde0
TM		 1315 struct rpc_message msg = {
1316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1317 .rpc_argp = &data->c_arg,
1318 .rpc_resp = &data->c_res,
1319 .rpc_cred = data->owner->so_cred,
1320 };
c970aa85
TM		 1321 struct rpc_task_setup task_setup_data = {
1322 .rpc_client = server->client,
5138fde0 1323 .rpc_message = &msg,
c970aa85
TM		 1324 .callback_ops = &nfs4_open_confirm_ops,
1325 .callback_data = data,
101070ca 1326 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1327 .flags = RPC_TASK_ASYNC,
1328 };
1da177e4
LT		 1329 int status;
1330
c6d00e63 1331 kref_get(&data->kref);
3e309914
TM		 1332 data->rpc_done = 0;
1333 data->rpc_status = 0;
5138fde0 1334 data->timestamp = jiffies;
c970aa85 1335 task = rpc_run_task(&task_setup_data);
7a1218a2 1336 if (IS_ERR(task))
cdd4e68b 1337 return PTR_ERR(task);
cdd4e68b
TM		 1338 status = nfs4_wait_for_completion_rpc_task(task);
1339 if (status != 0) {
1340 data->cancelled = 1;
1341 smp_wmb();
1342 } else
1343 status = data->rpc_status;
e6b3c4db 1344 rpc_put_task(task);
1da177e4
LT		 1345 return status;
1346}
1347
24ac23ab 1348static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1349{
24ac23ab
TM		 1350 struct nfs4_opendata *data = calldata;
1351 struct nfs4_state_owner *sp = data->owner;
5138fde0 1352
24ac23ab
TM		 1353 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1354 return;
aac00a8d
TM		 1355 /*
1356 * Check if we still need to send an OPEN call, or if we can use
1357 * a delegation instead.
1358 */
1359 if (data->state != NULL) {
1360 struct nfs_delegation *delegation;
1361
dc0b027d 1362 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1363 goto out_no_action;
aac00a8d
TM		 1364 rcu_read_lock();
1365 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1366 if (delegation != NULL &&
15c831bf 1367 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1368 rcu_read_unlock();
6ee41268 1369 goto out_no_action;
aac00a8d
TM		 1370 }
1371 rcu_read_unlock();
1372 }
24ac23ab 1373 /* Update sequence id. */
9f958ab8 1374 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1375 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1376 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1377 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1378 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1379 }
26e976a8 1380 data->timestamp = jiffies;
035168ab 1381 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1382 &data->o_arg.seq_args,
1383 &data->o_res.seq_res, 1, task))
1384 return;
5138fde0 1385 rpc_call_start(task);
6ee41268
TM		 1386 return;
1387out_no_action:
1388 task->tk_action = NULL;
1389
24ac23ab 1390}
1da177e4 1391
b257957e
AB		 1392static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1393{
1394 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1395 nfs4_open_prepare(task, calldata);
1396}
1397
24ac23ab
TM		 1398static void nfs4_open_done(struct rpc_task *task, void *calldata)
1399{
1400 struct nfs4_opendata *data = calldata;
1da177e4 1401
24ac23ab 1402 data->rpc_status = task->tk_status;
d898528c 1403
14516c3a
TM		 1404 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1405 return;
d898528c 1406
24ac23ab
TM		 1407 if (task->tk_status == 0) {
1408 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1409 case S_IFREG:
1410 break;
1411 case S_IFLNK:
24ac23ab 1412 data->rpc_status = -ELOOP;
6f926b5b
TM		 1413 break;
1414 case S_IFDIR:
24ac23ab 1415 data->rpc_status = -EISDIR;
6f926b5b
TM		 1416 break;
1417 default:
24ac23ab 1418 data->rpc_status = -ENOTDIR;
6f926b5b 1419 }
26e976a8 1420 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1421 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1422 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1423 }
3e309914 1424 data->rpc_done = 1;
24ac23ab 1425}
6f926b5b 1426
24ac23ab
TM		 1427static void nfs4_open_release(void *calldata)
1428{
1429 struct nfs4_opendata *data = calldata;
1430 struct nfs4_state *state = NULL;
1431
1432 /* If this request hasn't been cancelled, do nothing */
1433 if (data->cancelled == 0)
1434 goto out_free;
1435 /* In case of error, no cleanup! */
3e309914 1436 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1437 goto out_free;
1438 /* In case we need an open_confirm, no cleanup! */
1439 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1440 goto out_free;
24ac23ab 1441 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1442 if (!IS_ERR(state))
dc0b027d 1443 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1444out_free:
c6d00e63 1445 nfs4_opendata_put(data);
24ac23ab
TM		 1446}
1447
1448static const struct rpc_call_ops nfs4_open_ops = {
1449 .rpc_call_prepare = nfs4_open_prepare,
1450 .rpc_call_done = nfs4_open_done,
1451 .rpc_release = nfs4_open_release,
1452};
1453
b257957e
AB		 1454static const struct rpc_call_ops nfs4_recover_open_ops = {
1455 .rpc_call_prepare = nfs4_recover_open_prepare,
1456 .rpc_call_done = nfs4_open_done,
1457 .rpc_release = nfs4_open_release,
1458};
1459
1460static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1461{
1462 struct inode *dir = data->dir->d_inode;
1463 struct nfs_server *server = NFS_SERVER(dir);
1464 struct nfs_openargs *o_arg = &data->o_arg;
1465 struct nfs_openres *o_res = &data->o_res;
1466 struct rpc_task *task;
5138fde0
TM		 1467 struct rpc_message msg = {
1468 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1469 .rpc_argp = o_arg,
1470 .rpc_resp = o_res,
1471 .rpc_cred = data->owner->so_cred,
1472 };
c970aa85
TM		 1473 struct rpc_task_setup task_setup_data = {
1474 .rpc_client = server->client,
5138fde0 1475 .rpc_message = &msg,
c970aa85
TM		 1476 .callback_ops = &nfs4_open_ops,
1477 .callback_data = data,
101070ca 1478 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1479 .flags = RPC_TASK_ASYNC,
1480 };
24ac23ab
TM		 1481 int status;
1482
c6d00e63 1483 kref_get(&data->kref);
3e309914
TM		 1484 data->rpc_done = 0;
1485 data->rpc_status = 0;
2ced46c2 1486 data->cancelled = 0;
b257957e
AB		 1487 if (isrecover)
1488 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1489 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1490 if (IS_ERR(task))
1491 return PTR_ERR(task);
1492 status = nfs4_wait_for_completion_rpc_task(task);
1493 if (status != 0) {
1494 data->cancelled = 1;
1495 smp_wmb();
1496 } else
1497 status = data->rpc_status;
1498 rpc_put_task(task);
1499
1500 return status;
1501}
1502
1503static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1504{
1505 struct inode *dir = data->dir->d_inode;
1506 struct nfs_openres *o_res = &data->o_res;
1507 int status;
1508
1509 status = nfs4_run_open_task(data, 1);
1510 if (status != 0 || !data->rpc_done)
1511 return status;
1512
1513 nfs_refresh_inode(dir, o_res->dir_attr);
1514
1515 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1516 status = _nfs4_proc_open_confirm(data);
1517 if (status != 0)
1518 return status;
1519 }
1520
1521 return status;
1522}
1523
1524/*
1525 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1526 */
1527static int _nfs4_proc_open(struct nfs4_opendata *data)
1528{
1529 struct inode *dir = data->dir->d_inode;
1530 struct nfs_server *server = NFS_SERVER(dir);
1531 struct nfs_openargs *o_arg = &data->o_arg;
1532 struct nfs_openres *o_res = &data->o_res;
1533 int status;
1534
1535 status = nfs4_run_open_task(data, 0);
3e309914 1536 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1537 return status;
1538
56ae19f3
TM		 1539 if (o_arg->open_flags & O_CREAT) {
1540 update_changeattr(dir, &o_res->cinfo);
1541 nfs_post_op_update_inode(dir, o_res->dir_attr);
1542 } else
1543 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1544 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1545 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1546 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1547 status = _nfs4_proc_open_confirm(data);
1da177e4 1548 if (status != 0)
24ac23ab 1549 return status;
1da177e4
LT		 1550 }
1551 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1552 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1553 return 0;
1da177e4
LT		 1554}
1555
10afec90 1556static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1557{
7539bbab 1558 struct nfs_client *clp = server->nfs_client;
a78cb57a 1559 unsigned int loop;
6b30954e 1560 int ret;
58d9714a 1561
a78cb57a 1562 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1563 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1564 if (ret != 0)
a78cb57a 1565 break;
e598d843
TM		 1566 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1567 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1568 break;
58d9714a 1569 nfs4_schedule_state_recovery(clp);
a78cb57a 1570 ret = -EIO;
6b30954e 1571 }
a78cb57a 1572 return ret;
58d9714a
TM		 1573}
1574
1da177e4
LT		 1575/*
1576 * OPEN_EXPIRED:
1577 * reclaim state on the server after a network partition.
1578 * Assumes caller holds the appropriate lock
1579 */
539cd03a 1580static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1581{
e56e0b78 1582 struct nfs4_opendata *opendata;
864472e9 1583 int ret;
1da177e4 1584
6f220ed5
TM		 1585 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1586 if (IS_ERR(opendata))
1587 return PTR_ERR(opendata);
864472e9 1588 ret = nfs4_open_recover(opendata, state);
35d05778 1589 if (ret == -ESTALE)
539cd03a 1590 d_drop(ctx->path.dentry);
c6d00e63 1591 nfs4_opendata_put(opendata);
864472e9 1592 return ret;
1da177e4
LT		 1593}
1594
a9ed2e25 1595static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1596{
539cd03a 1597 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1598 struct nfs4_exception exception = { };
1599 int err;
1600
1601 do {
539cd03a 1602 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1603 switch (err) {
1604 default:
1605 goto out;
1606 case -NFS4ERR_GRACE:
1607 case -NFS4ERR_DELAY:
2c643488 1608 case -EKEYEXPIRED:
a9ed2e25
TM		 1609 nfs4_handle_exception(server, err, &exception);
1610 err = 0;
1611 }
202b50dc 1612 } while (exception.retry);
a9ed2e25 1613out:
202b50dc
TM		 1614 return err;
1615}
1616
1da177e4
LT		 1617static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1618{
1da177e4 1619 struct nfs_open_context *ctx;
864472e9 1620 int ret;
1da177e4 1621
864472e9
TM		 1622 ctx = nfs4_state_find_open_context(state);
1623 if (IS_ERR(ctx))
1624 return PTR_ERR(ctx);
539cd03a 1625 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1626 put_nfs_open_context(ctx);
1627 return ret;
1da177e4
LT		 1628}
1629
aa53ed54
JL		 1630/*
1631 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1632 * fields corresponding to attributes that were used to store the verifier.
1633 * Make sure we clobber those fields in the later setattr call
1634 */
1635static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1636{
1637 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1638 !(sattr->ia_valid & ATTR_ATIME_SET))
1639 sattr->ia_valid |= ATTR_ATIME;
1640
1641 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1642 !(sattr->ia_valid & ATTR_MTIME_SET))
1643 sattr->ia_valid |= ATTR_MTIME;
1644}
1645
1da177e4 1646/*
24ac23ab 1647 * Returns a referenced nfs4_state
1da177e4 1648 */
dc0b027d 1649static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1650{
1651 struct nfs4_state_owner *sp;
1652 struct nfs4_state *state = NULL;
1653 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1654 struct nfs4_opendata *opendata;
aac00a8d 1655 int status;
1da177e4
LT		 1656
1657 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1658 status = -ENOMEM;
1659 if (!(sp = nfs4_get_state_owner(server, cred))) {
1660 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1661 goto out_err;
1662 }
58d9714a
TM		 1663 status = nfs4_recover_expired_lease(server);
1664 if (status != 0)
b4454fe1 1665 goto err_put_state_owner;
aac00a8d 1666 if (path->dentry->d_inode != NULL)
dc0b027d 1667 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1668 status = -ENOMEM;
8535b2be 1669 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1670 if (opendata == NULL)
95d35cb4 1671 goto err_put_state_owner;
1da177e4 1672
aac00a8d
TM		 1673 if (path->dentry->d_inode != NULL)
1674 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1675
24ac23ab 1676 status = _nfs4_proc_open(opendata);
1da177e4 1677 if (status != 0)
c6d00e63 1678 goto err_opendata_put;
1da177e4 1679
24ac23ab 1680 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1681 status = PTR_ERR(state);
1682 if (IS_ERR(state))
c6d00e63 1683 goto err_opendata_put;
0df5dd4a 1684 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1685 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1686
1687 if (opendata->o_arg.open_flags & O_EXCL) {
1688 nfs4_exclusive_attrset(opendata, sattr);
1689
1690 nfs_fattr_init(opendata->o_res.f_attr);
1691 status = nfs4_do_setattr(state->inode, cred,
1692 opendata->o_res.f_attr, sattr,
1693 state);
1694 if (status == 0)
1695 nfs_setattr_update_inode(state->inode, sattr);
1696 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1697 }
c6d00e63 1698 nfs4_opendata_put(opendata);
1da177e4 1699 nfs4_put_state_owner(sp);
1da177e4
LT		 1700 *res = state;
1701 return 0;
c6d00e63
TM		 1702err_opendata_put:
1703 nfs4_opendata_put(opendata);
e56e0b78
TM		 1704err_put_state_owner:
1705 nfs4_put_state_owner(sp);
1da177e4 1706out_err:
1da177e4
LT		 1707 *res = NULL;
1708 return status;
1709}
1710
1711
dc0b027d 1712static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1713{
1714 struct nfs4_exception exception = { };
1715 struct nfs4_state *res;
1716 int status;
1717
1718 do {
dc0b027d 1719 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1720 if (status == 0)
1721 break;
1722 /* NOTE: BAD_SEQID means the server and client disagree about the
1723 * book-keeping w.r.t. state-changing operations
1724 * (OPEN/CLOSE/LOCK/LOCKU...)
1725 * It is actually a sign of a bug on the client or on the server.
1726 *
1727 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1728 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1729 * have unhashed the old state_owner for us, and that we can
1730 * therefore safely retry using a new one. We should still warn
1731 * the user though...
1732 */
1733 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1734 printk(KERN_WARNING "NFS: v4 server %s "
1735 " returned a bad sequence-id error!\n",
1736 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1737 exception.retry = 1;
1738 continue;
1739 }
550f5747
TM		 1740 /*
1741 * BAD_STATEID on OPEN means that the server cancelled our
1742 * state before it received the OPEN_CONFIRM.
1743 * Recover by retrying the request as per the discussion
1744 * on Page 181 of RFC3530.
1745 */
1746 if (status == -NFS4ERR_BAD_STATEID) {
1747 exception.retry = 1;
1748 continue;
1749 }
aac00a8d
TM		 1750 if (status == -EAGAIN) {
1751 /* We must have found a delegation */
1752 exception.retry = 1;
1753 continue;
1754 }
1da177e4
LT		 1755 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1756 status, &exception));
1757 } while (exception.retry);
1758 return res;
1759}
1760
659bfcd6
TM		 1761static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1762 struct nfs_fattr *fattr, struct iattr *sattr,
1763 struct nfs4_state *state)
1da177e4 1764{
3e4f6290 1765 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1766 struct nfs_setattrargs arg = {
3e4f6290 1767 .fh = NFS_FH(inode),
1da177e4
LT		 1768 .iap = sattr,
1769 .server = server,
1770 .bitmask = server->attr_bitmask,
1771 };
1772 struct nfs_setattrres res = {
1773 .fattr = fattr,
1774 .server = server,
1775 };
1776 struct rpc_message msg = {
659bfcd6
TM		 1777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1778 .rpc_argp = &arg,
1779 .rpc_resp = &res,
1780 .rpc_cred = cred,
1da177e4 1781 };
26e976a8 1782 unsigned long timestamp = jiffies;
65e4308d 1783 int status;
1da177e4 1784
0e574af1 1785 nfs_fattr_init(fattr);
1da177e4 1786
3e4f6290
TM		 1787 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1788 /* Use that stateid */
1789 } else if (state != NULL) {
77041ed9 1790 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1791 } else
1da177e4
LT		 1792 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1793
cccef3b9 1794 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1795 if (status == 0 && state != NULL)
1796 renew_lease(server, timestamp);
65e4308d 1797 return status;
1da177e4
LT		 1798}
1799
659bfcd6
TM		 1800static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1801 struct nfs_fattr *fattr, struct iattr *sattr,
1802 struct nfs4_state *state)
1da177e4 1803{
3e4f6290 1804 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1805 struct nfs4_exception exception = { };
1806 int err;
1807 do {
1808 err = nfs4_handle_exception(server,
659bfcd6 1809 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1810 &exception);
1811 } while (exception.retry);
1812 return err;
1813}
1814
1815struct nfs4_closedata {
4a35bd41 1816 struct path path;
1da177e4
LT		 1817 struct inode *inode;
1818 struct nfs4_state *state;
1819 struct nfs_closeargs arg;
1820 struct nfs_closeres res;
516a6af6 1821 struct nfs_fattr fattr;
26e976a8 1822 unsigned long timestamp;
1da177e4
LT		 1823};
1824
963d8fe5 1825static void nfs4_free_closedata(void *data)
9512135d 1826{
963d8fe5
TM		 1827 struct nfs4_closedata *calldata = data;
1828 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1829
1830 nfs4_put_open_state(calldata->state);
1831 nfs_free_seqid(calldata->arg.seqid);
9512135d 1832 nfs4_put_state_owner(sp);
31f31db1 1833 path_put(&calldata->path);
9512135d
TM		 1834 kfree(calldata);
1835}
1836
88069f77
TM		 1837static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1838 fmode_t fmode)
1839{
1840 spin_lock(&state->owner->so_lock);
1841 if (!(fmode & FMODE_READ))
1842 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1843 if (!(fmode & FMODE_WRITE))
1844 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1845 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1846 spin_unlock(&state->owner->so_lock);
1847}
1848
963d8fe5 1849static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1850{
963d8fe5 1851 struct nfs4_closedata *calldata = data;
1da177e4 1852 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1853 struct nfs_server *server = NFS_SERVER(calldata->inode);
1854
14516c3a
TM		 1855 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1856 return;
1da177e4
LT		 1857 /* hmm. we are done with the inode, and in the process of freeing
1858 * the state_owner. we keep this around to process errors
1859 */
1da177e4
LT		 1860 switch (task->tk_status) {
1861 case 0:
45328c35 1862 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1863 renew_lease(server, calldata->timestamp);
88069f77
TM		 1864 nfs4_close_clear_stateid_flags(state,
1865 calldata->arg.fmode);
1da177e4
LT		 1866 break;
1867 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1868 case -NFS4ERR_OLD_STATEID:
1869 case -NFS4ERR_BAD_STATEID:
1da177e4 1870 case -NFS4ERR_EXPIRED:
dc0b027d 1871 if (calldata->arg.fmode == 0)
9e33bed5 1872 break;
1da177e4 1873 default:
72211dbe
TM		 1874 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1875 rpc_restart_call_prepare(task);
1da177e4 1876 }
72211dbe 1877 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1878 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1879}
1880
4ce70ada 1881static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1882{
4ce70ada 1883 struct nfs4_closedata *calldata = data;
9512135d 1884 struct nfs4_state *state = calldata->state;
88069f77 1885 int call_close = 0;
9512135d 1886
963d8fe5 1887 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1888 return;
003707c7 1889
88069f77
TM		 1890 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1891 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1892 spin_lock(&state->owner->so_lock);
003707c7 1893 /* Calculate the change in open mode */
e7616923 1894 if (state->n_rdwr == 0) {
003707c7 1895 if (state->n_rdonly == 0) {
88069f77
TM		 1896 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1897 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1898 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1899 }
1900 if (state->n_wronly == 0) {
88069f77
TM		 1901 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1902 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1903 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1904 }
e7616923 1905 }
4cecb76f 1906 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1907
1908 if (!call_close) {
963d8fe5
TM		 1909 /* Note: exit _without_ calling nfs4_close_done */
1910 task->tk_action = NULL;
9512135d
TM		 1911 return;
1912 }
88069f77
TM		 1913
1914 if (calldata->arg.fmode == 0)
1915 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1916
516a6af6 1917 nfs_fattr_init(calldata->res.fattr);
26e976a8 1918 calldata->timestamp = jiffies;
035168ab 1919 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1920 &calldata->arg.seq_args, &calldata->res.seq_res,
1921 1, task))
1922 return;
5138fde0 1923 rpc_call_start(task);
1da177e4
LT		 1924}
1925
963d8fe5 1926static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1927 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1928 .rpc_call_done = nfs4_close_done,
1929 .rpc_release = nfs4_free_closedata,
1930};
1931
1da177e4
LT		 1932/*
1933 * It is possible for data to be read/written from a mem-mapped file
1934 * after the sys_close call (which hits the vfs layer as a flush).
1935 * This means that we can't safely call nfsv4 close on a file until
1936 * the inode is cleared. This in turn means that we are not good
1937 * NFSv4 citizens - we do not indicate to the server to update the file's
1938 * share state even when we are done with one of the three share
1939 * stateid's in the inode.
1940 *
1941 * NOTE: Caller must be holding the sp->so_owner semaphore!
1942 */
8535b2be 1943int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 1944{
4a35bd41 1945 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1946 struct nfs4_closedata *calldata;
b39e625b
TM		 1947 struct nfs4_state_owner *sp = state->owner;
1948 struct rpc_task *task;
5138fde0
TM		 1949 struct rpc_message msg = {
1950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1951 .rpc_cred = state->owner->so_cred,
1952 };
c970aa85
TM		 1953 struct rpc_task_setup task_setup_data = {
1954 .rpc_client = server->client,
5138fde0 1955 .rpc_message = &msg,
c970aa85 1956 .callback_ops = &nfs4_close_ops,
101070ca 1957 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1958 .flags = RPC_TASK_ASYNC,
1959 };
9512135d 1960 int status = -ENOMEM;
1da177e4 1961
8535b2be 1962 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 1963 if (calldata == NULL)
9512135d 1964 goto out;
4a35bd41 1965 calldata->inode = state->inode;
1da177e4 1966 calldata->state = state;
4a35bd41 1967 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1968 calldata->arg.stateid = &state->open_stateid;
1da177e4 1969 /* Serialization for the sequence id */
8535b2be 1970 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 1971 if (calldata->arg.seqid == NULL)
1972 goto out_free_calldata;
dc0b027d 1973 calldata->arg.fmode = 0;
a65318bf 1974 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1975 calldata->res.fattr = &calldata->fattr;
c1d51931 1976 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1977 calldata->res.server = server;
5f7dbd5c 1978 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
f6948697
AV		 1979 path_get(path);
1980 calldata->path = *path;
9512135d 1981
5138fde0
TM		 1982 msg.rpc_argp = &calldata->arg,
1983 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1984 task_setup_data.callback_data = calldata;
1985 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1986 if (IS_ERR(task))
1987 return PTR_ERR(task);
a49c3c77
TM		 1988 status = 0;
1989 if (wait)
1990 status = rpc_wait_for_completion_task(task);
b39e625b 1991 rpc_put_task(task);
a49c3c77 1992 return status;
9512135d
TM		 1993out_free_calldata:
1994 kfree(calldata);
1995out:
b39e625b
TM		 1996 nfs4_put_open_state(state);
1997 nfs4_put_state_owner(sp);
9512135d 1998 return status;
1da177e4
LT		 1999}
2000
dc0b027d 2001static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 2002{
2003 struct file *filp;
1b45c46c 2004 int ret;
02a913a7 2005
1b45c46c 2006 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 2007 if (fmode & FMODE_EXEC) {
af22f94a 2008 ret = nfs_may_open(state->inode,
1b45c46c
TM		 2009 state->owner->so_cred,
2010 nd->intent.open.flags);
2011 if (ret < 0)
2012 goto out_close;
2013 }
4a35bd41 2014 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 2015 if (!IS_ERR(filp)) {
2016 struct nfs_open_context *ctx;
cd3758e3 2017 ctx = nfs_file_open_context(filp);
02a913a7 2018 ctx->state = state;
95cf959b
TM		 2019 return 0;
2020 }
1b45c46c
TM		 2021 ret = PTR_ERR(filp);
2022out_close:
dc0b027d 2023 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 2024 return ret;
02a913a7
TM		 2025}
2026
2027struct dentry *
1da177e4
LT		 2028nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
2029{
ad389da7 2030 struct path path = {
4ac91378 2031 .mnt = nd->path.mnt,
ad389da7
TM		 2032 .dentry = dentry,
2033 };
4ac91378 2034 struct dentry *parent;
1da177e4
LT		 2035 struct iattr attr;
2036 struct rpc_cred *cred;
2037 struct nfs4_state *state;
02a913a7 2038 struct dentry *res;
dc0b027d 2039 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2040
2041 if (nd->flags & LOOKUP_CREATE) {
2042 attr.ia_mode = nd->intent.open.create_mode;
2043 attr.ia_valid = ATTR_MODE;
2044 if (!IS_POSIXACL(dir))
ce3b0f8d 2045 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2046 } else {
2047 attr.ia_valid = 0;
2048 BUG_ON(nd->intent.open.flags & O_CREAT);
2049 }
2050
98a8e323 2051 cred = rpc_lookup_cred();
1da177e4 2052 if (IS_ERR(cred))
02a913a7 2053 return (struct dentry *)cred;
565277f6
TM		 2054 parent = dentry->d_parent;
2055 /* Protect against concurrent sillydeletes */
2056 nfs_block_sillyrename(parent);
dc0b027d 2057 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2058 put_rpccred(cred);
02a913a7 2059 if (IS_ERR(state)) {
d75340cc 2060 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2061 d_add(dentry, NULL);
d75340cc
TM		 2062 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2063 }
565277f6 2064 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2065 return (struct dentry *)state;
2066 }
24ac23ab 2067 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2068 if (res != NULL)
deee9369 2069 path.dentry = res;
d75340cc 2070 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2071 nfs_unblock_sillyrename(parent);
dc0b027d 2072 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2073 return res;
1da177e4
LT		 2074}
2075
2076int
02a913a7 2077nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2078{
ad389da7 2079 struct path path = {
4ac91378 2080 .mnt = nd->path.mnt,
ad389da7
TM		 2081 .dentry = dentry,
2082 };
1da177e4
LT		 2083 struct rpc_cred *cred;
2084 struct nfs4_state *state;
dc0b027d 2085 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2086
98a8e323 2087 cred = rpc_lookup_cred();
1da177e4
LT		 2088 if (IS_ERR(cred))
2089 return PTR_ERR(cred);
dc0b027d 2090 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2091 put_rpccred(cred);
02a913a7
TM		 2092 if (IS_ERR(state)) {
2093 switch (PTR_ERR(state)) {
2094 case -EPERM:
2095 case -EACCES:
2096 case -EDQUOT:
2097 case -ENOSPC:
2098 case -EROFS:
04287f97 2099 return PTR_ERR(state);
b87c0adf
CL		 2100 default:
2101 goto out_drop;
02a913a7 2102 }
02a913a7 2103 }
24ac23ab 2104 if (state->inode == dentry->d_inode) {
d75340cc 2105 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2106 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2107 return 1;
2108 }
dc0b027d 2109 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2110out_drop:
2111 d_drop(dentry);
1da177e4
LT		 2112 return 0;
2113}
2114
1185a552 2115static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2116{
2117 if (ctx->state == NULL)
2118 return;
2119 if (is_sync)
2120 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2121 else
2122 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2123}
1da177e4
LT		 2124
2125static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2126{
43652ad5
BH		 2127 struct nfs4_server_caps_arg args = {
2128 .fhandle = fhandle,
2129 };
1da177e4
LT		 2130 struct nfs4_server_caps_res res = {};
2131 struct rpc_message msg = {
2132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2133 .rpc_argp = &args,
1da177e4
LT		 2134 .rpc_resp = &res,
2135 };
2136 int status;
2137
cccef3b9 2138 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2139 if (status == 0) {
2140 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2141 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2142 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2143 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2144 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2145 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2146 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2147 server->caps |= NFS_CAP_ACLS;
2148 if (res.has_links != 0)
2149 server->caps |= NFS_CAP_HARDLINKS;
2150 if (res.has_symlinks != 0)
2151 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2152 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2153 server->caps |= NFS_CAP_FILEID;
2154 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2155 server->caps |= NFS_CAP_MODE;
2156 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2157 server->caps |= NFS_CAP_NLINK;
2158 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2159 server->caps |= NFS_CAP_OWNER;
2160 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2161 server->caps |= NFS_CAP_OWNER_GROUP;
2162 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2163 server->caps |= NFS_CAP_ATIME;
2164 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2165 server->caps |= NFS_CAP_CTIME;
2166 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2167 server->caps |= NFS_CAP_MTIME;
2168
a65318bf
TM		 2169 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2170 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2171 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2172 server->acl_bitmask = res.acl_bitmask;
2173 }
cccef3b9 2174
1da177e4
LT		 2175 return status;
2176}
2177
55a97593 2178int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2179{
2180 struct nfs4_exception exception = { };
2181 int err;
2182 do {
2183 err = nfs4_handle_exception(server,
2184 _nfs4_server_capabilities(server, fhandle),
2185 &exception);
2186 } while (exception.retry);
2187 return err;
2188}
2189
2190static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2191 struct nfs_fsinfo *info)
2192{
1da177e4
LT		 2193 struct nfs4_lookup_root_arg args = {
2194 .bitmask = nfs4_fattr_bitmap,
2195 };
2196 struct nfs4_lookup_res res = {
2197 .server = server,
0e574af1 2198 .fattr = info->fattr,
1da177e4
LT		 2199 .fh = fhandle,
2200 };
2201 struct rpc_message msg = {
2202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2203 .rpc_argp = &args,
2204 .rpc_resp = &res,
2205 };
008f55d0 2206
0e574af1 2207 nfs_fattr_init(info->fattr);
fccba804 2208 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2209}
2210
2211static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2212 struct nfs_fsinfo *info)
2213{
2214 struct nfs4_exception exception = { };
2215 int err;
2216 do {
2217 err = nfs4_handle_exception(server,
2218 _nfs4_lookup_root(server, fhandle, info),
2219 &exception);
2220 } while (exception.retry);
2221 return err;
2222}
2223
54ceac45
DH		 2224/*
2225 * get the file handle for the "/" directory on the server
2226 */
1da177e4 2227static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2228 struct nfs_fsinfo *info)
1da177e4 2229{
1da177e4
LT		 2230 int status;
2231
1da177e4 2232 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2233 if (status == 0)
2234 status = nfs4_server_capabilities(server, fhandle);
2235 if (status == 0)
2236 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2237 return nfs4_map_errors(status);
1da177e4
LT		 2238}
2239
6b97fd3d
MN		 2240/*
2241 * Get locations and (maybe) other attributes of a referral.
2242 * Note that we'll actually follow the referral later when
2243 * we detect fsid mismatch in inode revalidation
2244 */
56659e99 2245static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2246{
2247 int status = -ENOMEM;
2248 struct page *page = NULL;
2249 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2250
2251 page = alloc_page(GFP_KERNEL);
2252 if (page == NULL)
2253 goto out;
2254 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2255 if (locations == NULL)
2256 goto out;
2257
c228fd3a 2258 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2259 if (status != 0)
2260 goto out;
2261 /* Make sure server returned a different fsid for the referral */
2262 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2263 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2264 status = -EIO;
2265 goto out;
2266 }
2267
2268 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2269 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2270 if (!fattr->mode)
2271 fattr->mode = S_IFDIR;
2272 memset(fhandle, 0, sizeof(struct nfs_fh));
2273out:
2274 if (page)
2275 __free_page(page);
2276 if (locations)
2277 kfree(locations);
2278 return status;
2279}
2280
1da177e4
LT		 2281static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2282{
2283 struct nfs4_getattr_arg args = {
2284 .fh = fhandle,
2285 .bitmask = server->attr_bitmask,
2286 };
2287 struct nfs4_getattr_res res = {
2288 .fattr = fattr,
2289 .server = server,
2290 };
2291 struct rpc_message msg = {
2292 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2293 .rpc_argp = &args,
2294 .rpc_resp = &res,
2295 };
2296
0e574af1 2297 nfs_fattr_init(fattr);
cccef3b9 2298 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2299}
2300
2301static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2302{
2303 struct nfs4_exception exception = { };
2304 int err;
2305 do {
2306 err = nfs4_handle_exception(server,
2307 _nfs4_proc_getattr(server, fhandle, fattr),
2308 &exception);
2309 } while (exception.retry);
2310 return err;
2311}
2312
2313/*
2314 * The file is not closed if it is opened due to the a request to change
2315 * the size of the file. The open call will not be needed once the
2316 * VFS layer lookup-intents are implemented.
2317 *
2318 * Close is called when the inode is destroyed.
2319 * If we haven't opened the file for O_WRONLY, we
2320 * need to in the size_change case to obtain a stateid.
2321 *
2322 * Got race?
2323 * Because OPEN is always done by name in nfsv4, it is
2324 * possible that we opened a different file by the same
2325 * name. We can recognize this race condition, but we
2326 * can't do anything about it besides returning an error.
2327 *
2328 * This will be fixed with VFS changes (lookup-intent).
2329 */
2330static int
2331nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2332 struct iattr *sattr)
2333{
08e9eac4 2334 struct inode *inode = dentry->d_inode;
659bfcd6 2335 struct rpc_cred *cred = NULL;
d530838b 2336 struct nfs4_state *state = NULL;
1da177e4
LT		 2337 int status;
2338
0e574af1 2339 nfs_fattr_init(fattr);
1da177e4 2340
d530838b 2341 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2342 if (sattr->ia_valid & ATTR_FILE) {
2343 struct nfs_open_context *ctx;
2344
2345 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2346 if (ctx) {
2347 cred = ctx->cred;
2348 state = ctx->state;
2349 }
659bfcd6 2350 }
08e9eac4 2351
659bfcd6 2352 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2353 if (status == 0)
2354 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2355 return status;
2356}
2357
56659e99
TM		 2358static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2359 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2360 struct nfs_fattr *fattr)
2361{
2362 int status;
2363 struct nfs4_lookup_arg args = {
2364 .bitmask = server->attr_bitmask,
2365 .dir_fh = dirfh,
2366 .name = name,
2367 };
2368 struct nfs4_lookup_res res = {
2369 .server = server,
2370 .fattr = fattr,
2371 .fh = fhandle,
2372 };
2373 struct rpc_message msg = {
2374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2375 .rpc_argp = &args,
2376 .rpc_resp = &res,
2377 };
2378
2379 nfs_fattr_init(fattr);
2380
2381 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2382 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2383 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2384 return status;
2385}
2386
2387static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2388 struct qstr *name, struct nfs_fh *fhandle,
2389 struct nfs_fattr *fattr)
2390{
2391 struct nfs4_exception exception = { };
2392 int err;
2393 do {
4e56e082
TM		 2394 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2395 /* FIXME: !!!! */
2396 if (err == -NFS4ERR_MOVED) {
2397 err = -EREMOTE;
2398 break;
2399 }
2400 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2401 } while (exception.retry);
2402 return err;
2403}
2404
56659e99 2405static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2406 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2407{
4e56e082 2408 int status;
1da177e4
LT		 2409
2410 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2411 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2412 if (status == -NFS4ERR_MOVED)
2413 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2414 dprintk("NFS reply lookup: %d\n", status);
2415 return status;
2416}
2417
2418static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2419{
2420 struct nfs4_exception exception = { };
2421 int err;
2422 do {
2423 err = nfs4_handle_exception(NFS_SERVER(dir),
2424 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2425 &exception);
2426 } while (exception.retry);
2427 return err;
2428}
2429
2430static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2431{
76b32999 2432 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2433 struct nfs4_accessargs args = {
2434 .fh = NFS_FH(inode),
76b32999
TM		 2435 .bitmask = server->attr_bitmask,
2436 };
2437 struct nfs4_accessres res = {
2438 .server = server,
1da177e4 2439 };
1da177e4
LT		 2440 struct rpc_message msg = {
2441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2442 .rpc_argp = &args,
2443 .rpc_resp = &res,
2444 .rpc_cred = entry->cred,
2445 };
2446 int mode = entry->mask;
2447 int status;
2448
2449 /*
2450 * Determine which access bits we want to ask for...
2451 */
2452 if (mode & MAY_READ)
2453 args.access |= NFS4_ACCESS_READ;
2454 if (S_ISDIR(inode->i_mode)) {
2455 if (mode & MAY_WRITE)
2456 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2457 if (mode & MAY_EXEC)
2458 args.access |= NFS4_ACCESS_LOOKUP;
2459 } else {
2460 if (mode & MAY_WRITE)
2461 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2462 if (mode & MAY_EXEC)
2463 args.access |= NFS4_ACCESS_EXECUTE;
2464 }
c407d41a
TM		 2465
2466 res.fattr = nfs_alloc_fattr();
2467 if (res.fattr == NULL)
2468 return -ENOMEM;
2469
cccef3b9 2470 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2471 if (!status) {
2472 entry->mask = 0;
2473 if (res.access & NFS4_ACCESS_READ)
2474 entry->mask |= MAY_READ;
2475 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2476 entry->mask |= MAY_WRITE;
2477 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2478 entry->mask |= MAY_EXEC;
c407d41a 2479 nfs_refresh_inode(inode, res.fattr);
1da177e4 2480 }
c407d41a 2481 nfs_free_fattr(res.fattr);
1da177e4
LT		 2482 return status;
2483}
2484
2485static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2486{
2487 struct nfs4_exception exception = { };
2488 int err;
2489 do {
2490 err = nfs4_handle_exception(NFS_SERVER(inode),
2491 _nfs4_proc_access(inode, entry),
2492 &exception);
2493 } while (exception.retry);
2494 return err;
2495}
2496
2497/*
2498 * TODO: For the time being, we don't try to get any attributes
2499 * along with any of the zero-copy operations READ, READDIR,
2500 * READLINK, WRITE.
2501 *
2502 * In the case of the first three, we want to put the GETATTR
2503 * after the read-type operation -- this is because it is hard
2504 * to predict the length of a GETATTR response in v4, and thus
2505 * align the READ data correctly. This means that the GETATTR
2506 * may end up partially falling into the page cache, and we should
2507 * shift it into the 'tail' of the xdr_buf before processing.
2508 * To do this efficiently, we need to know the total length
2509 * of data received, which doesn't seem to be available outside
2510 * of the RPC layer.
2511 *
2512 * In the case of WRITE, we also want to put the GETATTR after
2513 * the operation -- in this case because we want to make sure
2514 * we get the post-operation mtime and size. This means that
2515 * we can't use xdr_encode_pages() as written: we need a variant
2516 * of it which would leave room in the 'tail' iovec.
2517 *
2518 * Both of these changes to the XDR layer would in fact be quite
2519 * minor, but I decided to leave them for a subsequent patch.
2520 */
2521static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2522 unsigned int pgbase, unsigned int pglen)
2523{
2524 struct nfs4_readlink args = {
2525 .fh = NFS_FH(inode),
2526 .pgbase = pgbase,
2527 .pglen = pglen,
2528 .pages = &page,
2529 };
f50c7000 2530 struct nfs4_readlink_res res;
1da177e4
LT		 2531 struct rpc_message msg = {
2532 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2533 .rpc_argp = &args,
f50c7000 2534 .rpc_resp = &res,
1da177e4
LT		 2535 };
2536
cccef3b9 2537 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2538}
2539
2540static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2541 unsigned int pgbase, unsigned int pglen)
2542{
2543 struct nfs4_exception exception = { };
2544 int err;
2545 do {
2546 err = nfs4_handle_exception(NFS_SERVER(inode),
2547 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2548 &exception);
2549 } while (exception.retry);
2550 return err;
2551}
2552
1da177e4
LT		 2553/*
2554 * Got race?
2555 * We will need to arrange for the VFS layer to provide an atomic open.
2556 * Until then, this create/open method is prone to inefficiency and race
2557 * conditions due to the lookup, create, and open VFS calls from sys_open()
2558 * placed on the wire.
2559 *
2560 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2561 * The file will be opened again in the subsequent VFS open call
2562 * (nfs4_proc_file_open).
2563 *
2564 * The open for read will just hang around to be used by any process that
2565 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2566 */
2567
2568static int
2569nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2570 int flags, struct nameidata *nd)
1da177e4 2571{
ad389da7 2572 struct path path = {
4ac91378 2573 .mnt = nd->path.mnt,
ad389da7
TM		 2574 .dentry = dentry,
2575 };
1da177e4
LT		 2576 struct nfs4_state *state;
2577 struct rpc_cred *cred;
dc0b027d 2578 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2579 int status = 0;
2580
98a8e323 2581 cred = rpc_lookup_cred();
1da177e4
LT		 2582 if (IS_ERR(cred)) {
2583 status = PTR_ERR(cred);
2584 goto out;
2585 }
dc0b027d 2586 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2587 d_drop(dentry);
1da177e4
LT		 2588 if (IS_ERR(state)) {
2589 status = PTR_ERR(state);
659bfcd6 2590 goto out_putcred;
1da177e4 2591 }
d4d9cdcb 2592 d_add(dentry, igrab(state->inode));
d75340cc 2593 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
ad389da7 2594 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2595 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2596 else
dc0b027d 2597 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2598out_putcred:
2599 put_rpccred(cred);
1da177e4
LT		 2600out:
2601 return status;
2602}
2603
2604static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2605{
16e42959 2606 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2607 struct nfs_removeargs args = {
1da177e4 2608 .fh = NFS_FH(dir),
4fdc17b2
TM		 2609 .name.len = name->len,
2610 .name.name = name->name,
16e42959
TM		 2611 .bitmask = server->attr_bitmask,
2612 };
4fdc17b2 2613 struct nfs_removeres res = {
16e42959 2614 .server = server,
1da177e4 2615 };
1da177e4 2616 struct rpc_message msg = {
4fdc17b2
TM		 2617 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2618 .rpc_argp = &args,
2619 .rpc_resp = &res,
1da177e4 2620 };
d346890b
TM		 2621 int status = -ENOMEM;
2622
2623 res.dir_attr = nfs_alloc_fattr();
2624 if (res.dir_attr == NULL)
2625 goto out;
1da177e4 2626
cccef3b9 2627 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2628 if (status == 0) {
2629 update_changeattr(dir, &res.cinfo);
d346890b 2630 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2631 }
d346890b
TM		 2632 nfs_free_fattr(res.dir_attr);
2633out:
1da177e4
LT		 2634 return status;
2635}
2636
2637static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2638{
2639 struct nfs4_exception exception = { };
2640 int err;
2641 do {
2642 err = nfs4_handle_exception(NFS_SERVER(dir),
2643 _nfs4_proc_remove(dir, name),
2644 &exception);
2645 } while (exception.retry);
2646 return err;
2647}
2648
e4eff1a6 2649static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2650{
e4eff1a6
TM		 2651 struct nfs_server *server = NFS_SERVER(dir);
2652 struct nfs_removeargs *args = msg->rpc_argp;
2653 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2654
a65318bf 2655 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2656 res->server = server;
1da177e4 2657 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2658}
2659
e4eff1a6 2660static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2661{
e4eff1a6
TM		 2662 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2663
14516c3a
TM		 2664 if (!nfs4_sequence_done(task, &res->seq_res))
2665 return 0;
9e33bed5 2666 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2667 return 0;
2668 update_changeattr(dir, &res->cinfo);
d346890b 2669 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2670 return 1;
1da177e4
LT		 2671}
2672
2673static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2674 struct inode *new_dir, struct qstr *new_name)
2675{
6caf2c82 2676 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2677 struct nfs4_rename_arg arg = {
2678 .old_dir = NFS_FH(old_dir),
2679 .new_dir = NFS_FH(new_dir),
2680 .old_name = old_name,
2681 .new_name = new_name,
6caf2c82
TM		 2682 .bitmask = server->attr_bitmask,
2683 };
6caf2c82
TM		 2684 struct nfs4_rename_res res = {
2685 .server = server,
1da177e4 2686 };
1da177e4
LT		 2687 struct rpc_message msg = {
2688 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2689 .rpc_argp = &arg,
2690 .rpc_resp = &res,
2691 };
011fff72 2692 int status = -ENOMEM;
1da177e4 2693
011fff72
TM		 2694 res.old_fattr = nfs_alloc_fattr();
2695 res.new_fattr = nfs_alloc_fattr();
2696 if (res.old_fattr == NULL || res.new_fattr == NULL)
2697 goto out;
1da177e4 2698
011fff72 2699 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2700 if (!status) {
2701 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2702 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2703 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2704 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2705 }
011fff72
TM		 2706out:
2707 nfs_free_fattr(res.new_fattr);
2708 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2709 return status;
2710}
2711
2712static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2713 struct inode *new_dir, struct qstr *new_name)
2714{
2715 struct nfs4_exception exception = { };
2716 int err;
2717 do {
2718 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2719 _nfs4_proc_rename(old_dir, old_name,
2720 new_dir, new_name),
2721 &exception);
2722 } while (exception.retry);
2723 return err;
2724}
2725
2726static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2727{
91ba2eee 2728 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2729 struct nfs4_link_arg arg = {
2730 .fh = NFS_FH(inode),
2731 .dir_fh = NFS_FH(dir),
2732 .name = name,
91ba2eee
TM		 2733 .bitmask = server->attr_bitmask,
2734 };
91ba2eee
TM		 2735 struct nfs4_link_res res = {
2736 .server = server,
1da177e4 2737 };
1da177e4
LT		 2738 struct rpc_message msg = {
2739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2740 .rpc_argp = &arg,
91ba2eee 2741 .rpc_resp = &res,
1da177e4 2742 };
136f2627
TM		 2743 int status = -ENOMEM;
2744
2745 res.fattr = nfs_alloc_fattr();
2746 res.dir_attr = nfs_alloc_fattr();
2747 if (res.fattr == NULL || res.dir_attr == NULL)
2748 goto out;
1da177e4 2749
cccef3b9 2750 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2751 if (!status) {
2752 update_changeattr(dir, &res.cinfo);
2753 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2754 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2755 }
136f2627
TM		 2756out:
2757 nfs_free_fattr(res.dir_attr);
2758 nfs_free_fattr(res.fattr);
1da177e4
LT		 2759 return status;
2760}
2761
2762static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2763{
2764 struct nfs4_exception exception = { };
2765 int err;
2766 do {
2767 err = nfs4_handle_exception(NFS_SERVER(inode),
2768 _nfs4_proc_link(inode, dir, name),
2769 &exception);
2770 } while (exception.retry);
2771 return err;
2772}
2773
57dc9a57
TM		 2774struct nfs4_createdata {
2775 struct rpc_message msg;
2776 struct nfs4_create_arg arg;
2777 struct nfs4_create_res res;
2778 struct nfs_fh fh;
2779 struct nfs_fattr fattr;
2780 struct nfs_fattr dir_fattr;
2781};
2782
2783static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2784 struct qstr *name, struct iattr *sattr, u32 ftype)
2785{
2786 struct nfs4_createdata *data;
2787
2788 data = kzalloc(sizeof(*data), GFP_KERNEL);
2789 if (data != NULL) {
2790 struct nfs_server *server = NFS_SERVER(dir);
2791
2792 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2793 data->msg.rpc_argp = &data->arg;
2794 data->msg.rpc_resp = &data->res;
2795 data->arg.dir_fh = NFS_FH(dir);
2796 data->arg.server = server;
2797 data->arg.name = name;
2798 data->arg.attrs = sattr;
2799 data->arg.ftype = ftype;
2800 data->arg.bitmask = server->attr_bitmask;
2801 data->res.server = server;
2802 data->res.fh = &data->fh;
2803 data->res.fattr = &data->fattr;
2804 data->res.dir_fattr = &data->dir_fattr;
2805 nfs_fattr_init(data->res.fattr);
2806 nfs_fattr_init(data->res.dir_fattr);
2807 }
2808 return data;
2809}
2810
2811static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2812{
cccef3b9
AA		 2813 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2814 &data->arg, &data->res, 1);
57dc9a57
TM		 2815 if (status == 0) {
2816 update_changeattr(dir, &data->res.dir_cinfo);
2817 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2818 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2819 }
2820 return status;
2821}
2822
2823static void nfs4_free_createdata(struct nfs4_createdata *data)
2824{
2825 kfree(data);
2826}
2827
4f390c15 2828static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2829 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2830{
57dc9a57
TM		 2831 struct nfs4_createdata *data;
2832 int status = -ENAMETOOLONG;
1da177e4 2833
94a6d753 2834 if (len > NFS4_MAXPATHLEN)
57dc9a57 2835 goto out;
4f390c15 2836
57dc9a57
TM		 2837 status = -ENOMEM;
2838 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2839 if (data == NULL)
2840 goto out;
2841
2842 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2843 data->arg.u.symlink.pages = &page;
2844 data->arg.u.symlink.len = len;
1da177e4 2845
57dc9a57
TM		 2846 status = nfs4_do_create(dir, dentry, data);
2847
2848 nfs4_free_createdata(data);
2849out:
1da177e4
LT		 2850 return status;
2851}
2852
4f390c15 2853static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2854 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2855{
2856 struct nfs4_exception exception = { };
2857 int err;
2858 do {
2859 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2860 _nfs4_proc_symlink(dir, dentry, page,
2861 len, sattr),
1da177e4
LT		 2862 &exception);
2863 } while (exception.retry);
2864 return err;
2865}
2866
2867static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2868 struct iattr *sattr)
2869{
57dc9a57
TM		 2870 struct nfs4_createdata *data;
2871 int status = -ENOMEM;
1da177e4 2872
57dc9a57
TM		 2873 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2874 if (data == NULL)
2875 goto out;
2876
2877 status = nfs4_do_create(dir, dentry, data);
2878
2879 nfs4_free_createdata(data);
2880out:
1da177e4
LT		 2881 return status;
2882}
2883
2884static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2885 struct iattr *sattr)
2886{
2887 struct nfs4_exception exception = { };
2888 int err;
2889 do {
2890 err = nfs4_handle_exception(NFS_SERVER(dir),
2891 _nfs4_proc_mkdir(dir, dentry, sattr),
2892 &exception);
2893 } while (exception.retry);
2894 return err;
2895}
2896
2897static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2898 u64 cookie, struct page *page, unsigned int count, int plus)
2899{
2900 struct inode *dir = dentry->d_inode;
2901 struct nfs4_readdir_arg args = {
2902 .fh = NFS_FH(dir),
2903 .pages = &page,
2904 .pgbase = 0,
2905 .count = count,
96d25e53 2906 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2907 };
2908 struct nfs4_readdir_res res;
2909 struct rpc_message msg = {
2910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2911 .rpc_argp = &args,
2912 .rpc_resp = &res,
2913 .rpc_cred = cred,
2914 };
2915 int status;
2916
3110ff80 2917 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2918 dentry->d_parent->d_name.name,
2919 dentry->d_name.name,
2920 (unsigned long long)cookie);
1da177e4
LT		 2921 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2922 res.pgbase = args.pgbase;
cccef3b9 2923 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2924 if (status == 0)
2925 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2926
2927 nfs_invalidate_atime(dir);
2928
3110ff80 2929 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2930 return status;
2931}
2932
2933static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2934 u64 cookie, struct page *page, unsigned int count, int plus)
2935{
2936 struct nfs4_exception exception = { };
2937 int err;
2938 do {
2939 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2940 _nfs4_proc_readdir(dentry, cred, cookie,
2941 page, count, plus),
2942 &exception);
2943 } while (exception.retry);
2944 return err;
2945}
2946
2947static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2948 struct iattr *sattr, dev_t rdev)
2949{
57dc9a57
TM		 2950 struct nfs4_createdata *data;
2951 int mode = sattr->ia_mode;
2952 int status = -ENOMEM;
1da177e4
LT		 2953
2954 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2955 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2956
2957 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2958 if (data == NULL)
2959 goto out;
2960
1da177e4 2961 if (S_ISFIFO(mode))
57dc9a57 2962 data->arg.ftype = NF4FIFO;
1da177e4 2963 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2964 data->arg.ftype = NF4BLK;
2965 data->arg.u.device.specdata1 = MAJOR(rdev);
2966 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2967 }
2968 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2969 data->arg.ftype = NF4CHR;
2970 data->arg.u.device.specdata1 = MAJOR(rdev);
2971 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2972 }
1da177e4 2973
57dc9a57
TM		 2974 status = nfs4_do_create(dir, dentry, data);
2975
2976 nfs4_free_createdata(data);
2977out:
1da177e4
LT		 2978 return status;
2979}
2980
2981static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2982 struct iattr *sattr, dev_t rdev)
2983{
2984 struct nfs4_exception exception = { };
2985 int err;
2986 do {
2987 err = nfs4_handle_exception(NFS_SERVER(dir),
2988 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2989 &exception);
2990 } while (exception.retry);
2991 return err;
2992}
2993
2994static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2995 struct nfs_fsstat *fsstat)
2996{
2997 struct nfs4_statfs_arg args = {
2998 .fh = fhandle,
2999 .bitmask = server->attr_bitmask,
3000 };
24ad148a
BH		 3001 struct nfs4_statfs_res res = {
3002 .fsstat = fsstat,
3003 };
1da177e4
LT		 3004 struct rpc_message msg = {
3005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3006 .rpc_argp = &args,
24ad148a 3007 .rpc_resp = &res,
1da177e4
LT		 3008 };
3009
0e574af1 3010 nfs_fattr_init(fsstat->fattr);
cccef3b9 3011 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3012}
3013
3014static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3015{
3016 struct nfs4_exception exception = { };
3017 int err;
3018 do {
3019 err = nfs4_handle_exception(server,
3020 _nfs4_proc_statfs(server, fhandle, fsstat),
3021 &exception);
3022 } while (exception.retry);
3023 return err;
3024}
3025
3026static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3027 struct nfs_fsinfo *fsinfo)
3028{
3029 struct nfs4_fsinfo_arg args = {
3030 .fh = fhandle,
3031 .bitmask = server->attr_bitmask,
3032 };
3dda5e43
BH		 3033 struct nfs4_fsinfo_res res = {
3034 .fsinfo = fsinfo,
3035 };
1da177e4
LT		 3036 struct rpc_message msg = {
3037 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3038 .rpc_argp = &args,
3dda5e43 3039 .rpc_resp = &res,
1da177e4
LT		 3040 };
3041
cccef3b9 3042 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3043}
3044
3045static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3046{
3047 struct nfs4_exception exception = { };
3048 int err;
3049
3050 do {
3051 err = nfs4_handle_exception(server,
3052 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3053 &exception);
3054 } while (exception.retry);
3055 return err;
3056}
3057
3058static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3059{
0e574af1 3060 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3061 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3062}
3063
3064static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3065 struct nfs_pathconf *pathconf)
3066{
3067 struct nfs4_pathconf_arg args = {
3068 .fh = fhandle,
3069 .bitmask = server->attr_bitmask,
3070 };
d45b2989
BH		 3071 struct nfs4_pathconf_res res = {
3072 .pathconf = pathconf,
3073 };
1da177e4
LT		 3074 struct rpc_message msg = {
3075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3076 .rpc_argp = &args,
d45b2989 3077 .rpc_resp = &res,
1da177e4
LT		 3078 };
3079
3080 /* None of the pathconf attributes are mandatory to implement */
3081 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3082 memset(pathconf, 0, sizeof(*pathconf));
3083 return 0;
3084 }
3085
0e574af1 3086 nfs_fattr_init(pathconf->fattr);
cccef3b9 3087 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3088}
3089
3090static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3091 struct nfs_pathconf *pathconf)
3092{
3093 struct nfs4_exception exception = { };
3094 int err;
3095
3096 do {
3097 err = nfs4_handle_exception(server,
3098 _nfs4_proc_pathconf(server, fhandle, pathconf),
3099 &exception);
3100 } while (exception.retry);
3101 return err;
3102}
3103
ec06c096 3104static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3105{
ec06c096 3106 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3107
f11c88af
AA		 3108 dprintk("--> %s\n", __func__);
3109
14516c3a
TM		 3110 if (!nfs4_sequence_done(task, &data->res.seq_res))
3111 return -EAGAIN;
f11c88af 3112
9e33bed5 3113 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3114 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3115 return -EAGAIN;
1da177e4 3116 }
8850df99
TM		 3117
3118 nfs_invalidate_atime(data->inode);
1da177e4 3119 if (task->tk_status > 0)
ec06c096
TM		 3120 renew_lease(server, data->timestamp);
3121 return 0;
1da177e4
LT		 3122}
3123
bdc7f021 3124static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3125{
1da177e4 3126 data->timestamp = jiffies;
bdc7f021 3127 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3128}
3129
788e7a89 3130static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3131{
1da177e4
LT		 3132 struct inode *inode = data->inode;
3133
14516c3a
TM		 3134 if (!nfs4_sequence_done(task, &data->res.seq_res))
3135 return -EAGAIN;
def6ed7e 3136
9e33bed5 3137 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3138 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3139 return -EAGAIN;
1da177e4 3140 }
4f9838c7 3141 if (task->tk_status >= 0) {
1da177e4 3142 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3143 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3144 }
788e7a89 3145 return 0;
1da177e4
LT		 3146}
3147
bdc7f021 3148static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3149{
bdc7f021
TM		 3150 struct nfs_server *server = NFS_SERVER(data->inode);
3151
a65318bf 3152 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3153 data->res.server = server;
1da177e4
LT		 3154 data->timestamp = jiffies;
3155
bdc7f021 3156 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3157}
3158
788e7a89 3159static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3160{
1da177e4
LT		 3161 struct inode *inode = data->inode;
3162
14516c3a
TM		 3163 if (!nfs4_sequence_done(task, &data->res.seq_res))
3164 return -EAGAIN;
3165
9e33bed5 3166 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3167 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3168 return -EAGAIN;
1da177e4 3169 }
9e08a3c5 3170 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3171 return 0;
1da177e4
LT		 3172}
3173
bdc7f021 3174static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3175{
788e7a89 3176 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3177
a65318bf 3178 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3179 data->res.server = server;
bdc7f021 3180 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3181}
3182
9bc4e3ca
CL		 3183struct nfs4_renewdata {
3184 struct nfs_client *client;
3185 unsigned long timestamp;
3186};
3187
1da177e4
LT		 3188/*
3189 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3190 * standalone procedure for queueing an asynchronous RENEW.
3191 */
9bc4e3ca 3192static void nfs4_renew_release(void *calldata)
dc96aef9 3193{
9bc4e3ca
CL		 3194 struct nfs4_renewdata *data = calldata;
3195 struct nfs_client *clp = data->client;
dc96aef9 3196
0851de06
AB		 3197 if (atomic_read(&clp->cl_count) > 1)
3198 nfs4_schedule_state_renewal(clp);
3199 nfs_put_client(clp);
9bc4e3ca 3200 kfree(data);
dc96aef9
AB		 3201}
3202
9bc4e3ca 3203static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3204{
9bc4e3ca
CL		 3205 struct nfs4_renewdata *data = calldata;
3206 struct nfs_client *clp = data->client;
3207 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3208
3209 if (task->tk_status < 0) {
95baa25c
TM		 3210 /* Unless we're shutting down, schedule state recovery! */
3211 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3212 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3213 return;
3214 }
452e9352 3215 do_renew_lease(clp, timestamp);
1da177e4
LT		 3216}
3217
963d8fe5
TM		 3218static const struct rpc_call_ops nfs4_renew_ops = {
3219 .rpc_call_done = nfs4_renew_done,
dc96aef9 3220 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3221};
3222
adfa6f98 3223int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3224{
3225 struct rpc_message msg = {
3226 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3227 .rpc_argp = clp,
b4454fe1 3228 .rpc_cred = cred,
1da177e4 3229 };
9bc4e3ca 3230 struct nfs4_renewdata *data;
1da177e4 3231
0851de06
AB		 3232 if (!atomic_inc_not_zero(&clp->cl_count))
3233 return -EIO;
9bc4e3ca
CL		 3234 data = kmalloc(sizeof(*data), GFP_KERNEL);
3235 if (data == NULL)
3236 return -ENOMEM;
3237 data->client = clp;
3238 data->timestamp = jiffies;
1da177e4 3239 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3240 &nfs4_renew_ops, data);
1da177e4
LT		 3241}
3242
adfa6f98 3243int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3244{
3245 struct rpc_message msg = {
3246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3247 .rpc_argp = clp,
b4454fe1 3248 .rpc_cred = cred,
1da177e4
LT		 3249 };
3250 unsigned long now = jiffies;
3251 int status;
3252
3253 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3254 if (status < 0)
3255 return status;
452e9352 3256 do_renew_lease(clp, now);
1da177e4
LT		 3257 return 0;
3258}
3259
aa1870af
BF		 3260static inline int nfs4_server_supports_acls(struct nfs_server *server)
3261{
3262 return (server->caps & NFS_CAP_ACLS)
3263 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3264 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3265}
3266
3267/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3268 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3269 * the stack.
3270 */
3271#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3272
3273static void buf_to_pages(const void *buf, size_t buflen,
3274 struct page **pages, unsigned int *pgbase)
3275{
3276 const void *p = buf;
3277
3278 *pgbase = offset_in_page(buf);
3279 p -= *pgbase;
3280 while (p < buf + buflen) {
3281 *(pages++) = virt_to_page(p);
3282 p += PAGE_CACHE_SIZE;
3283 }
3284}
3285
e50a1c2e
BF		 3286struct nfs4_cached_acl {
3287 int cached;
3288 size_t len;
3e9d4154 3289 char data[0];
e50a1c2e
BF		 3290};
3291
3292static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3293{
3294 struct nfs_inode *nfsi = NFS_I(inode);
3295
3296 spin_lock(&inode->i_lock);
3297 kfree(nfsi->nfs4_acl);
3298 nfsi->nfs4_acl = acl;
3299 spin_unlock(&inode->i_lock);
3300}
3301
3302static void nfs4_zap_acl_attr(struct inode *inode)
3303{
3304 nfs4_set_cached_acl(inode, NULL);
3305}
3306
3307static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3308{
3309 struct nfs_inode *nfsi = NFS_I(inode);
3310 struct nfs4_cached_acl *acl;
3311 int ret = -ENOENT;
3312
3313 spin_lock(&inode->i_lock);
3314 acl = nfsi->nfs4_acl;
3315 if (acl == NULL)
3316 goto out;
3317 if (buf == NULL) /* user is just asking for length */
3318 goto out_len;
3319 if (acl->cached == 0)
3320 goto out;
3321 ret = -ERANGE; /* see getxattr(2) man page */
3322 if (acl->len > buflen)
3323 goto out;
3324 memcpy(buf, acl->data, acl->len);
3325out_len:
3326 ret = acl->len;
3327out:
3328 spin_unlock(&inode->i_lock);
3329 return ret;
3330}
3331
3332static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3333{
3334 struct nfs4_cached_acl *acl;
3335
3336 if (buf && acl_len <= PAGE_SIZE) {
3337 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3338 if (acl == NULL)
3339 goto out;
3340 acl->cached = 1;
3341 memcpy(acl->data, buf, acl_len);
3342 } else {
3343 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3344 if (acl == NULL)
3345 goto out;
3346 acl->cached = 0;
3347 }
3348 acl->len = acl_len;
3349out:
3350 nfs4_set_cached_acl(inode, acl);
3351}
3352
16b4289c 3353static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3354{
aa1870af
BF		 3355 struct page *pages[NFS4ACL_MAXPAGES];
3356 struct nfs_getaclargs args = {
3357 .fh = NFS_FH(inode),
3358 .acl_pages = pages,
3359 .acl_len = buflen,
3360 };
663c79b3
BH		 3361 struct nfs_getaclres res = {
3362 .acl_len = buflen,
3363 };
e50a1c2e 3364 void *resp_buf;
aa1870af
BF		 3365 struct rpc_message msg = {
3366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3367 .rpc_argp = &args,
663c79b3 3368 .rpc_resp = &res,
aa1870af 3369 };
e50a1c2e 3370 struct page *localpage = NULL;
aa1870af
BF		 3371 int ret;
3372
e50a1c2e
BF		 3373 if (buflen < PAGE_SIZE) {
3374 /* As long as we're doing a round trip to the server anyway,
3375 * let's be prepared for a page of acl data. */
3376 localpage = alloc_page(GFP_KERNEL);
3377 resp_buf = page_address(localpage);
3378 if (localpage == NULL)
3379 return -ENOMEM;
3380 args.acl_pages[0] = localpage;
3381 args.acl_pgbase = 0;
663c79b3 3382 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3383 } else {
3384 resp_buf = buf;
3385 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3386 }
cccef3b9 3387 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3388 if (ret)
3389 goto out_free;
663c79b3
BH		 3390 if (res.acl_len > args.acl_len)
3391 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3392 else
663c79b3 3393 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3394 if (buf) {
3395 ret = -ERANGE;
663c79b3 3396 if (res.acl_len > buflen)
e50a1c2e
BF		 3397 goto out_free;
3398 if (localpage)
663c79b3 3399 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3400 }
663c79b3 3401 ret = res.acl_len;
e50a1c2e
BF		 3402out_free:
3403 if (localpage)
3404 __free_page(localpage);
aa1870af
BF		 3405 return ret;
3406}
3407
16b4289c
TM		 3408static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3409{
3410 struct nfs4_exception exception = { };
3411 ssize_t ret;
3412 do {
3413 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3414 if (ret >= 0)
3415 break;
3416 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3417 } while (exception.retry);
3418 return ret;
3419}
3420
e50a1c2e
BF		 3421static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3422{
3423 struct nfs_server *server = NFS_SERVER(inode);
3424 int ret;
3425
3426 if (!nfs4_server_supports_acls(server))
3427 return -EOPNOTSUPP;
3428 ret = nfs_revalidate_inode(server, inode);
3429 if (ret < 0)
3430 return ret;
3431 ret = nfs4_read_cached_acl(inode, buf, buflen);
3432 if (ret != -ENOENT)
3433 return ret;
3434 return nfs4_get_acl_uncached(inode, buf, buflen);
3435}
3436
16b4289c 3437static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3438{
3439 struct nfs_server *server = NFS_SERVER(inode);
3440 struct page *pages[NFS4ACL_MAXPAGES];
3441 struct nfs_setaclargs arg = {
3442 .fh = NFS_FH(inode),
3443 .acl_pages = pages,
3444 .acl_len = buflen,
3445 };
73c403a9 3446 struct nfs_setaclres res;
4b580ee3
BF		 3447 struct rpc_message msg = {
3448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3449 .rpc_argp = &arg,
73c403a9 3450 .rpc_resp = &res,
4b580ee3
BF		 3451 };
3452 int ret;
3453
3454 if (!nfs4_server_supports_acls(server))
3455 return -EOPNOTSUPP;
642ac549 3456 nfs_inode_return_delegation(inode);
4b580ee3 3457 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3458 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3459 nfs_access_zap_cache(inode);
3460 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3461 return ret;
3462}
3463
16b4289c
TM		 3464static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3465{
3466 struct nfs4_exception exception = { };
3467 int err;
3468 do {
3469 err = nfs4_handle_exception(NFS_SERVER(inode),
3470 __nfs4_proc_set_acl(inode, buf, buflen),
3471 &exception);
3472 } while (exception.retry);
3473 return err;
3474}
3475
1da177e4 3476static int
aa5190d0 3477nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3478{
aa5190d0
TM		 3479 struct nfs_client *clp = server->nfs_client;
3480
3481 if (task->tk_status >= 0)
1da177e4
LT		 3482 return 0;
3483 switch(task->tk_status) {
9e33bed5
TM		 3484 case -NFS4ERR_ADMIN_REVOKED:
3485 case -NFS4ERR_BAD_STATEID:
3486 case -NFS4ERR_OPENMODE:
3487 if (state == NULL)
3488 break;
3489 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3490 goto do_state_recovery;
1da177e4 3491 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3492 if (state == NULL)
3493 break;
3494 nfs4_state_mark_reclaim_reboot(clp, state);
3495 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3496 case -NFS4ERR_EXPIRED:
a2c0b9e2 3497 goto do_state_recovery;
4745e315
AA		 3498#if defined(CONFIG_NFS_V4_1)
3499 case -NFS4ERR_BADSESSION:
3500 case -NFS4ERR_BADSLOT:
3501 case -NFS4ERR_BAD_HIGH_SLOT:
3502 case -NFS4ERR_DEADSESSION:
3503 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3504 case -NFS4ERR_SEQ_FALSE_RETRY:
3505 case -NFS4ERR_SEQ_MISORDERED:
3506 dprintk("%s ERROR %d, Reset session\n", __func__,
3507 task->tk_status);
0b9e2d41 3508 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3509 task->tk_status = 0;
3510 return -EAGAIN;
3511#endif /* CONFIG_NFS_V4_1 */
1da177e4 3512 case -NFS4ERR_DELAY:
aa5190d0 3513 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3514 case -NFS4ERR_GRACE:
2c643488 3515 case -EKEYEXPIRED:
1da177e4
LT		 3516 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3517 task->tk_status = 0;
3518 return -EAGAIN;
3519 case -NFS4ERR_OLD_STATEID:
3520 task->tk_status = 0;
3521 return -EAGAIN;
3522 }
3523 task->tk_status = nfs4_map_errors(task->tk_status);
3524 return 0;
a2c0b9e2
TM		 3525do_state_recovery:
3526 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3527 nfs4_schedule_state_recovery(clp);
3528 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3529 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3530 task->tk_status = 0;
3531 return -EAGAIN;
1da177e4
LT		 3532}
3533
bb8b27e5
TM		 3534int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3535 unsigned short port, struct rpc_cred *cred,
3536 struct nfs4_setclientid_res *res)
1da177e4
LT		 3537{
3538 nfs4_verifier sc_verifier;
3539 struct nfs4_setclientid setclientid = {
3540 .sc_verifier = &sc_verifier,
3541 .sc_prog = program,
3542 };
3543 struct rpc_message msg = {
3544 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3545 .rpc_argp = &setclientid,
bb8b27e5 3546 .rpc_resp = res,
286d7d6a 3547 .rpc_cred = cred,
1da177e4 3548 };
bc4785cd 3549 __be32 *p;
1da177e4
LT		 3550 int loop = 0;
3551 int status;
3552
bc4785cd 3553 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3554 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3555 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3556
3557 for(;;) {
3558 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3559 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3560 clp->cl_ipaddr,
3561 rpc_peeraddr2str(clp->cl_rpcclient,
3562 RPC_DISPLAY_ADDR),
69dd716c
TM		 3563 rpc_peeraddr2str(clp->cl_rpcclient,
3564 RPC_DISPLAY_PROTO),
78ea323b 3565 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3566 clp->cl_id_uniquifier);
3567 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3568 sizeof(setclientid.sc_netid),
3569 rpc_peeraddr2str(clp->cl_rpcclient,
3570 RPC_DISPLAY_NETID));
1da177e4 3571 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3572 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3573 clp->cl_ipaddr, port >> 8, port & 255);
3574
3575 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3576 if (status != -NFS4ERR_CLID_INUSE)
3577 break;
3578 if (signalled())
3579 break;
3580 if (loop++ & 1)
3581 ssleep(clp->cl_lease_time + 1);
3582 else
3583 if (++clp->cl_id_uniquifier == 0)
3584 break;
3585 }
3586 return status;
3587}
3588
bb8b27e5
TM		 3589static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3590 struct nfs4_setclientid_res *arg,
3591 struct rpc_cred *cred)
1da177e4
LT		 3592{
3593 struct nfs_fsinfo fsinfo;
3594 struct rpc_message msg = {
3595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3596 .rpc_argp = arg,
1da177e4 3597 .rpc_resp = &fsinfo,
286d7d6a 3598 .rpc_cred = cred,
1da177e4
LT		 3599 };
3600 unsigned long now;
3601 int status;
3602
3603 now = jiffies;
3604 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3605 if (status == 0) {
3606 spin_lock(&clp->cl_lock);
3607 clp->cl_lease_time = fsinfo.lease_time * HZ;
3608 clp->cl_last_renewal = now;
3609 spin_unlock(&clp->cl_lock);
3610 }
3611 return status;
3612}
3613
bb8b27e5
TM		 3614int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3615 struct nfs4_setclientid_res *arg,
3616 struct rpc_cred *cred)
51581f3b 3617{
77e03677 3618 long timeout = 0;
51581f3b
TM		 3619 int err;
3620 do {
bb8b27e5 3621 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3622 switch (err) {
3623 case 0:
3624 return err;
3625 case -NFS4ERR_RESOURCE:
3626 /* The IBM lawyers misread another document! */
3627 case -NFS4ERR_DELAY:
2c643488 3628 case -EKEYEXPIRED:
51581f3b
TM		 3629 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3630 }
3631 } while (err == 0);
3632 return err;
3633}
3634
fe650407
TM		 3635struct nfs4_delegreturndata {
3636 struct nfs4_delegreturnargs args;
fa178f29 3637 struct nfs4_delegreturnres res;
fe650407
TM		 3638 struct nfs_fh fh;
3639 nfs4_stateid stateid;
26e976a8 3640 unsigned long timestamp;
fa178f29 3641 struct nfs_fattr fattr;
fe650407
TM		 3642 int rpc_status;
3643};
3644
fe650407
TM		 3645static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3646{
3647 struct nfs4_delegreturndata *data = calldata;
938e1010 3648
14516c3a
TM		 3649 if (!nfs4_sequence_done(task, &data->res.seq_res))
3650 return;
938e1010 3651
79708861
RL		 3652 switch (task->tk_status) {
3653 case -NFS4ERR_STALE_STATEID:
3654 case -NFS4ERR_EXPIRED:
3655 case 0:
fa178f29 3656 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3657 break;
3658 default:
3659 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3660 -EAGAIN) {
3661 nfs_restart_rpc(task, data->res.server->nfs_client);
3662 return;
3663 }
3664 }
3665 data->rpc_status = task->tk_status;
fe650407
TM		 3666}
3667
3668static void nfs4_delegreturn_release(void *calldata)
3669{
fe650407
TM		 3670 kfree(calldata);
3671}
3672
938e1010
AA		 3673#if defined(CONFIG_NFS_V4_1)
3674static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3675{
3676 struct nfs4_delegreturndata *d_data;
3677
3678 d_data = (struct nfs4_delegreturndata *)data;
3679
035168ab 3680 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3681 &d_data->args.seq_args,
3682 &d_data->res.seq_res, 1, task))
3683 return;
3684 rpc_call_start(task);
3685}
3686#endif /* CONFIG_NFS_V4_1 */
3687
c8d149f3 3688static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3689#if defined(CONFIG_NFS_V4_1)
3690 .rpc_call_prepare = nfs4_delegreturn_prepare,
3691#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3692 .rpc_call_done = nfs4_delegreturn_done,
3693 .rpc_release = nfs4_delegreturn_release,
3694};
3695
e6f81075 3696static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3697{
3698 struct nfs4_delegreturndata *data;
fa178f29 3699 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3700 struct rpc_task *task;
5138fde0
TM		 3701 struct rpc_message msg = {
3702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3703 .rpc_cred = cred,
3704 };
c970aa85
TM		 3705 struct rpc_task_setup task_setup_data = {
3706 .rpc_client = server->client,
5138fde0 3707 .rpc_message = &msg,
c970aa85
TM		 3708 .callback_ops = &nfs4_delegreturn_ops,
3709 .flags = RPC_TASK_ASYNC,
3710 };
e6f81075 3711 int status = 0;
fe650407 3712
8535b2be 3713 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3714 if (data == NULL)
3715 return -ENOMEM;
3716 data->args.fhandle = &data->fh;
3717 data->args.stateid = &data->stateid;
fa178f29 3718 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3719 nfs_copy_fh(&data->fh, NFS_FH(inode));
3720 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3721 data->res.fattr = &data->fattr;
3722 data->res.server = server;
5f7dbd5c 3723 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3724 nfs_fattr_init(data->res.fattr);
26e976a8 3725 data->timestamp = jiffies;
fe650407
TM		 3726 data->rpc_status = 0;
3727
c970aa85 3728 task_setup_data.callback_data = data;
5138fde0
TM		 3729 msg.rpc_argp = &data->args,
3730 msg.rpc_resp = &data->res,
c970aa85 3731 task = rpc_run_task(&task_setup_data);
7a1218a2 3732 if (IS_ERR(task))
fe650407 3733 return PTR_ERR(task);
e6f81075
TM		 3734 if (!issync)
3735 goto out;
fe650407 3736 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3737 if (status != 0)
3738 goto out;
3739 status = data->rpc_status;
3740 if (status != 0)
3741 goto out;
3742 nfs_refresh_inode(inode, &data->fattr);
3743out:
e6b3c4db 3744 rpc_put_task(task);
fe650407 3745 return status;
1da177e4
LT		 3746}
3747
e6f81075 3748int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3749{
3750 struct nfs_server *server = NFS_SERVER(inode);
3751 struct nfs4_exception exception = { };
3752 int err;
3753 do {
e6f81075 3754 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3755 switch (err) {
3756 case -NFS4ERR_STALE_STATEID:
3757 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3758 case 0:
3759 return 0;
3760 }
3761 err = nfs4_handle_exception(server, err, &exception);
3762 } while (exception.retry);
3763 return err;
3764}
3765
3766#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3767#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3768
3769/*
3770 * sleep, with exponential backoff, and retry the LOCK operation.
3771 */
3772static unsigned long
3773nfs4_set_lock_task_retry(unsigned long timeout)
3774{
150030b7 3775 schedule_timeout_killable(timeout);
1da177e4
LT		 3776 timeout <<= 1;
3777 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3778 return NFS4_LOCK_MAXTIMEOUT;
3779 return timeout;
3780}
3781
1da177e4
LT		 3782static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3783{
3784 struct inode *inode = state->inode;
3785 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3786 struct nfs_client *clp = server->nfs_client;
911d1aaf 3787 struct nfs_lockt_args arg = {
1da177e4 3788 .fh = NFS_FH(inode),
911d1aaf 3789 .fl = request,
1da177e4 3790 };
911d1aaf
TM		 3791 struct nfs_lockt_res res = {
3792 .denied = request,
1da177e4
LT		 3793 };
3794 struct rpc_message msg = {
3795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3796 .rpc_argp = &arg,
3797 .rpc_resp = &res,
3798 .rpc_cred = state->owner->so_cred,
3799 };
1da177e4
LT		 3800 struct nfs4_lock_state *lsp;
3801 int status;
3802
911d1aaf 3803 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3804 status = nfs4_set_lock_state(state, request);
3805 if (status != 0)
3806 goto out;
3807 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3808 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3809 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3810 switch (status) {
3811 case 0:
3812 request->fl_type = F_UNLCK;
3813 break;
3814 case -NFS4ERR_DENIED:
3815 status = 0;
1da177e4 3816 }
70cc6487 3817 request->fl_ops->fl_release_private(request);
8d0a8a9d 3818out:
1da177e4
LT		 3819 return status;
3820}
3821
3822static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3823{
3824 struct nfs4_exception exception = { };
3825 int err;
3826
3827 do {
3828 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3829 _nfs4_proc_getlk(state, cmd, request),
3830 &exception);
3831 } while (exception.retry);
3832 return err;
3833}
3834
3835static int do_vfs_lock(struct file *file, struct file_lock *fl)
3836{
3837 int res = 0;
3838 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3839 case FL_POSIX:
3840 res = posix_lock_file_wait(file, fl);
3841 break;
3842 case FL_FLOCK:
3843 res = flock_lock_file_wait(file, fl);
3844 break;
3845 default:
3846 BUG();
3847 }
1da177e4
LT		 3848 return res;
3849}
3850
faf5f49c 3851struct nfs4_unlockdata {
911d1aaf
TM		 3852 struct nfs_locku_args arg;
3853 struct nfs_locku_res res;
faf5f49c
TM		 3854 struct nfs4_lock_state *lsp;
3855 struct nfs_open_context *ctx;
911d1aaf
TM		 3856 struct file_lock fl;
3857 const struct nfs_server *server;
26e976a8 3858 unsigned long timestamp;
faf5f49c
TM		 3859};
3860
911d1aaf
TM		 3861static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3862 struct nfs_open_context *ctx,
3863 struct nfs4_lock_state *lsp,
3864 struct nfs_seqid *seqid)
3865{
3866 struct nfs4_unlockdata *p;
3867 struct inode *inode = lsp->ls_state->inode;
3868
8535b2be 3869 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3870 if (p == NULL)
3871 return NULL;
3872 p->arg.fh = NFS_FH(inode);
3873 p->arg.fl = &p->fl;
3874 p->arg.seqid = seqid;
c1d51931 3875 p->res.seqid = seqid;
5f7dbd5c 3876 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3877 p->arg.stateid = &lsp->ls_stateid;
3878 p->lsp = lsp;
3879 atomic_inc(&lsp->ls_count);
3880 /* Ensure we don't close file until we're done freeing locks! */
3881 p->ctx = get_nfs_open_context(ctx);
3882 memcpy(&p->fl, fl, sizeof(p->fl));
3883 p->server = NFS_SERVER(inode);
3884 return p;
3885}
3886
06f814a3 3887static void nfs4_locku_release_calldata(void *data)
faf5f49c 3888{
963d8fe5 3889 struct nfs4_unlockdata *calldata = data;
911d1aaf 3890 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3891 nfs4_put_lock_state(calldata->lsp);
3892 put_nfs_open_context(calldata->ctx);
3893 kfree(calldata);
faf5f49c
TM		 3894}
3895
963d8fe5 3896static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3897{
963d8fe5 3898 struct nfs4_unlockdata *calldata = data;
faf5f49c 3899
14516c3a
TM		 3900 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3901 return;
faf5f49c
TM		 3902 switch (task->tk_status) {
3903 case 0:
3904 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3905 calldata->res.stateid.data,
faf5f49c 3906 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3907 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3908 break;
9e33bed5
TM		 3909 case -NFS4ERR_BAD_STATEID:
3910 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3911 case -NFS4ERR_STALE_STATEID:
3912 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3913 break;
3914 default:
9e33bed5 3915 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3916 nfs_restart_rpc(task,
d61e612a 3917 calldata->server->nfs_client);
faf5f49c 3918 }
faf5f49c
TM		 3919}
3920
4ce70ada 3921static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3922{
4ce70ada 3923 struct nfs4_unlockdata *calldata = data;
faf5f49c 3924
911d1aaf 3925 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3926 return;
3927 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3928 /* Note: exit _without_ running nfs4_locku_done */
3929 task->tk_action = NULL;
faf5f49c
TM		 3930 return;
3931 }
26e976a8 3932 calldata->timestamp = jiffies;
035168ab 3933 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3934 &calldata->arg.seq_args,
3935 &calldata->res.seq_res, 1, task))
3936 return;
5138fde0 3937 rpc_call_start(task);
faf5f49c
TM		 3938}
3939
963d8fe5 3940static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3941 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3942 .rpc_call_done = nfs4_locku_done,
06f814a3 3943 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3944};
3945
a5d16a4d
TM		 3946static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3947 struct nfs_open_context *ctx,
3948 struct nfs4_lock_state *lsp,
3949 struct nfs_seqid *seqid)
3950{
3951 struct nfs4_unlockdata *data;
5138fde0
TM		 3952 struct rpc_message msg = {
3953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3954 .rpc_cred = ctx->cred,
3955 };
c970aa85
TM		 3956 struct rpc_task_setup task_setup_data = {
3957 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3958 .rpc_message = &msg,
c970aa85 3959 .callback_ops = &nfs4_locku_ops,
101070ca 3960 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3961 .flags = RPC_TASK_ASYNC,
3962 };
a5d16a4d 3963
137d6aca
FF		 3964 /* Ensure this is an unlock - when canceling a lock, the
3965 * canceled lock is passed in, and it won't be an unlock.
3966 */
3967 fl->fl_type = F_UNLCK;
3968
a5d16a4d
TM		 3969 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3970 if (data == NULL) {
3971 nfs_free_seqid(seqid);
3972 return ERR_PTR(-ENOMEM);
3973 }
3974
5138fde0
TM		 3975 msg.rpc_argp = &data->arg,
3976 msg.rpc_resp = &data->res,
c970aa85
TM		 3977 task_setup_data.callback_data = data;
3978 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3979}
3980
faf5f49c
TM		 3981static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3982{
19e03c57 3983 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3984 struct nfs_seqid *seqid;
1da177e4 3985 struct nfs4_lock_state *lsp;
06f814a3
TM		 3986 struct rpc_task *task;
3987 int status = 0;
536ff0f8 3988 unsigned char fl_flags = request->fl_flags;
faf5f49c 3989
8d0a8a9d 3990 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3991 /* Unlock _before_ we do the RPC call */
3992 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3993 down_read(&nfsi->rwsem);
3994 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3995 up_read(&nfsi->rwsem);
9b073574 3996 goto out;
19e03c57
TM		 3997 }
3998 up_read(&nfsi->rwsem);
8d0a8a9d 3999 if (status != 0)
9b073574
TM		 4000 goto out;
4001 /* Is this a delegated lock? */
4002 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4003 goto out;
8d0a8a9d 4004 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4005 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4006 status = -ENOMEM;
911d1aaf 4007 if (seqid == NULL)
9b073574 4008 goto out;
cd3758e3 4009 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4010 status = PTR_ERR(task);
4011 if (IS_ERR(task))
9b073574 4012 goto out;
a5d16a4d 4013 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4014 rpc_put_task(task);
9b073574 4015out:
536ff0f8 4016 request->fl_flags = fl_flags;
1da177e4
LT		 4017 return status;
4018}
4019
a5d16a4d
TM		 4020struct nfs4_lockdata {
4021 struct nfs_lock_args arg;
4022 struct nfs_lock_res res;
4023 struct nfs4_lock_state *lsp;
4024 struct nfs_open_context *ctx;
4025 struct file_lock fl;
26e976a8 4026 unsigned long timestamp;
a5d16a4d
TM		 4027 int rpc_status;
4028 int cancelled;
66179efe 4029 struct nfs_server *server;
a5d16a4d
TM		 4030};
4031
4032static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4033 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4034 gfp_t gfp_mask)
1da177e4 4035{
a5d16a4d
TM		 4036 struct nfs4_lockdata *p;
4037 struct inode *inode = lsp->ls_state->inode;
1da177e4 4038 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4039
8535b2be 4040 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4041 if (p == NULL)
4042 return NULL;
4043
4044 p->arg.fh = NFS_FH(inode);
4045 p->arg.fl = &p->fl;
8535b2be 4046 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4047 if (p->arg.open_seqid == NULL)
4048 goto out_free;
8535b2be 4049 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4050 if (p->arg.lock_seqid == NULL)
2f74c0a0 4051 goto out_free_seqid;
a5d16a4d 4052 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4053 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4054 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 4055 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 4056 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 4057 p->lsp = lsp;
66179efe 4058 p->server = server;
a5d16a4d
TM		 4059 atomic_inc(&lsp->ls_count);
4060 p->ctx = get_nfs_open_context(ctx);
4061 memcpy(&p->fl, fl, sizeof(p->fl));
4062 return p;
2f74c0a0
TM		 4063out_free_seqid:
4064 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4065out_free:
4066 kfree(p);
4067 return NULL;
4068}
4069
4070static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4071{
4072 struct nfs4_lockdata *data = calldata;
4073 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4074
3110ff80 4075 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4076 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4077 return;
a5d16a4d
TM		 4078 /* Do we need to do an open_to_lock_owner? */
4079 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4080 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4081 return;
a5d16a4d
TM		 4082 data->arg.open_stateid = &state->stateid;
4083 data->arg.new_lock_owner = 1;
c1d51931 4084 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4085 } else
4086 data->arg.new_lock_owner = 0;
26e976a8 4087 data->timestamp = jiffies;
035168ab
TM		 4088 if (nfs4_setup_sequence(data->server,
4089 &data->arg.seq_args,
66179efe
AA		 4090 &data->res.seq_res, 1, task))
4091 return;
5138fde0 4092 rpc_call_start(task);
3110ff80 4093 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4094}
4095
b257957e
AB		 4096static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4097{
4098 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4099 nfs4_lock_prepare(task, calldata);
4100}
4101
a5d16a4d
TM		 4102static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4103{
4104 struct nfs4_lockdata *data = calldata;
4105
3110ff80 4106 dprintk("%s: begin!\n", __func__);
a5d16a4d 4107
14516c3a
TM		 4108 if (!nfs4_sequence_done(task, &data->res.seq_res))
4109 return;
66179efe 4110
a5d16a4d 4111 data->rpc_status = task->tk_status;
a5d16a4d 4112 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4113 if (data->rpc_status == 0)
4114 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4115 else
4116 goto out;
4117 }
4118 if (data->rpc_status == 0) {
4119 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4120 sizeof(data->lsp->ls_stateid.data));
4121 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4122 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4123 }
a5d16a4d 4124out:
3110ff80 4125 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4126}
4127
4128static void nfs4_lock_release(void *calldata)
4129{
4130 struct nfs4_lockdata *data = calldata;
4131
3110ff80 4132 dprintk("%s: begin!\n", __func__);
2f74c0a0 4133 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4134 if (data->cancelled != 0) {
4135 struct rpc_task *task;
4136 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4137 data->arg.lock_seqid);
4138 if (!IS_ERR(task))
e6b3c4db 4139 rpc_put_task(task);
3110ff80 4140 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4141 } else
4142 nfs_free_seqid(data->arg.lock_seqid);
4143 nfs4_put_lock_state(data->lsp);
4144 put_nfs_open_context(data->ctx);
4145 kfree(data);
3110ff80 4146 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4147}
4148
4149static const struct rpc_call_ops nfs4_lock_ops = {
4150 .rpc_call_prepare = nfs4_lock_prepare,
4151 .rpc_call_done = nfs4_lock_done,
4152 .rpc_release = nfs4_lock_release,
4153};
4154
b257957e
AB		 4155static const struct rpc_call_ops nfs4_recover_lock_ops = {
4156 .rpc_call_prepare = nfs4_recover_lock_prepare,
4157 .rpc_call_done = nfs4_lock_done,
4158 .rpc_release = nfs4_lock_release,
4159};
4160
2bee72a6
TM		 4161static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4162{
4163 struct nfs_client *clp = server->nfs_client;
4164 struct nfs4_state *state = lsp->ls_state;
4165
4166 switch (error) {
4167 case -NFS4ERR_ADMIN_REVOKED:
4168 case -NFS4ERR_BAD_STATEID:
4169 case -NFS4ERR_EXPIRED:
4170 if (new_lock_owner != 0 ||
4171 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4172 nfs4_state_mark_reclaim_nograce(clp, state);
4173 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4174 break;
4175 case -NFS4ERR_STALE_STATEID:
4176 if (new_lock_owner != 0 ||
4177 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4178 nfs4_state_mark_reclaim_reboot(clp, state);
4179 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4180 };
4181}
4182
afe6c27c 4183static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4184{
4185 struct nfs4_lockdata *data;
4186 struct rpc_task *task;
5138fde0
TM		 4187 struct rpc_message msg = {
4188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4189 .rpc_cred = state->owner->so_cred,
4190 };
c970aa85
TM		 4191 struct rpc_task_setup task_setup_data = {
4192 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4193 .rpc_message = &msg,
c970aa85 4194 .callback_ops = &nfs4_lock_ops,
101070ca 4195 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4196 .flags = RPC_TASK_ASYNC,
4197 };
a5d16a4d
TM		 4198 int ret;
4199
3110ff80 4200 dprintk("%s: begin!\n", __func__);
cd3758e3 4201 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4202 fl->fl_u.nfs4_fl.owner,
4203 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4204 if (data == NULL)
4205 return -ENOMEM;
4206 if (IS_SETLKW(cmd))
4207 data->arg.block = 1;
b257957e
AB		 4208 if (recovery_type > NFS_LOCK_NEW) {
4209 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4210 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4211 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4212 }
5138fde0
TM		 4213 msg.rpc_argp = &data->arg,
4214 msg.rpc_resp = &data->res,
c970aa85
TM		 4215 task_setup_data.callback_data = data;
4216 task = rpc_run_task(&task_setup_data);
7a1218a2 4217 if (IS_ERR(task))
a5d16a4d 4218 return PTR_ERR(task);
a5d16a4d
TM		 4219 ret = nfs4_wait_for_completion_rpc_task(task);
4220 if (ret == 0) {
4221 ret = data->rpc_status;
2bee72a6
TM		 4222 if (ret)
4223 nfs4_handle_setlk_error(data->server, data->lsp,
4224 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4225 } else
4226 data->cancelled = 1;
e6b3c4db 4227 rpc_put_task(task);
3110ff80 4228 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4229 return ret;
1da177e4
LT		 4230}
4231
4232static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4233{
202b50dc
TM		 4234 struct nfs_server *server = NFS_SERVER(state->inode);
4235 struct nfs4_exception exception = { };
4236 int err;
4237
4238 do {
42a2d13e
TM		 4239 /* Cache the lock if possible... */
4240 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4241 return 0;
afe6c27c 4242 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4243 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4244 break;
4245 nfs4_handle_exception(server, err, &exception);
4246 } while (exception.retry);
4247 return err;
1da177e4
LT		 4248}
4249
4250static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4251{
202b50dc
TM		 4252 struct nfs_server *server = NFS_SERVER(state->inode);
4253 struct nfs4_exception exception = { };
4254 int err;
4255
6bfc93ef
TM		 4256 err = nfs4_set_lock_state(state, request);
4257 if (err != 0)
4258 return err;
202b50dc 4259 do {
42a2d13e
TM		 4260 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4261 return 0;
afe6c27c 4262 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4263 switch (err) {
4264 default:
4265 goto out;
4266 case -NFS4ERR_GRACE:
4267 case -NFS4ERR_DELAY:
2c643488 4268 case -EKEYEXPIRED:
a9ed2e25
TM		 4269 nfs4_handle_exception(server, err, &exception);
4270 err = 0;
4271 }
202b50dc 4272 } while (exception.retry);
a9ed2e25 4273out:
202b50dc 4274 return err;
1da177e4
LT		 4275}
4276
4277static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4278{
19e03c57 4279 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4280 unsigned char fl_flags = request->fl_flags;
8e469ebd 4281 int status = -ENOLCK;
1da177e4 4282
8e469ebd
TM		 4283 if ((fl_flags & FL_POSIX) &&
4284 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4285 goto out;
6bfc93ef 4286 /* Is this a delegated open? */
6bfc93ef
TM		 4287 status = nfs4_set_lock_state(state, request);
4288 if (status != 0)
4289 goto out;
01c3b861
TM		 4290 request->fl_flags |= FL_ACCESS;
4291 status = do_vfs_lock(request->fl_file, request);
4292 if (status < 0)
4293 goto out;
19e03c57 4294 down_read(&nfsi->rwsem);
01c3b861 4295 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4296 /* Yes: cache locks! */
01c3b861 4297 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4298 request->fl_flags = fl_flags & ~FL_SLEEP;
4299 status = do_vfs_lock(request->fl_file, request);
4300 goto out_unlock;
01c3b861 4301 }
afe6c27c 4302 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4303 if (status != 0)
01c3b861 4304 goto out_unlock;
6bfc93ef 4305 /* Note: we always want to sleep here! */
01c3b861 4306 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4307 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4308 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4309out_unlock:
19e03c57 4310 up_read(&nfsi->rwsem);
01c3b861
TM		 4311out:
4312 request->fl_flags = fl_flags;
1da177e4
LT		 4313 return status;
4314}
4315
4316static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4317{
4318 struct nfs4_exception exception = { };
4319 int err;
4320
4321 do {
965b5d67
TM		 4322 err = _nfs4_proc_setlk(state, cmd, request);
4323 if (err == -NFS4ERR_DENIED)
4324 err = -EAGAIN;
1da177e4 4325 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4326 err, &exception);
1da177e4
LT		 4327 } while (exception.retry);
4328 return err;
4329}
4330
4331static int
4332nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4333{
4334 struct nfs_open_context *ctx;
4335 struct nfs4_state *state;
4336 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4337 int status;
4338
4339 /* verify open state */
cd3758e3 4340 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4341 state = ctx->state;
4342
4343 if (request->fl_start < 0 || request->fl_end < 0)
4344 return -EINVAL;
4345
d953126a
TM		 4346 if (IS_GETLK(cmd)) {
4347 if (state != NULL)
4348 return nfs4_proc_getlk(state, F_GETLK, request);
4349 return 0;
4350 }
1da177e4
LT		 4351
4352 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4353 return -EINVAL;
4354
d953126a
TM		 4355 if (request->fl_type == F_UNLCK) {
4356 if (state != NULL)
4357 return nfs4_proc_unlck(state, cmd, request);
4358 return 0;
4359 }
1da177e4 4360
d953126a
TM		 4361 if (state == NULL)
4362 return -ENOLCK;
1da177e4
LT		 4363 do {
4364 status = nfs4_proc_setlk(state, cmd, request);
4365 if ((status != -EAGAIN) || IS_SETLK(cmd))
4366 break;
4367 timeout = nfs4_set_lock_task_retry(timeout);
4368 status = -ERESTARTSYS;
4369 if (signalled())
4370 break;
4371 } while(status < 0);
1da177e4
LT		 4372 return status;
4373}
4374
888e694c
TM		 4375int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4376{
4377 struct nfs_server *server = NFS_SERVER(state->inode);
4378 struct nfs4_exception exception = { };
4379 int err;
4380
4381 err = nfs4_set_lock_state(state, fl);
4382 if (err != 0)
4383 goto out;
4384 do {
afe6c27c 4385 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4386 switch (err) {
4387 default:
4388 printk(KERN_ERR "%s: unhandled error %d.\n",
4389 __func__, err);
4390 case 0:
965b5d67 4391 case -ESTALE:
d5122201
TM		 4392 goto out;
4393 case -NFS4ERR_EXPIRED:
4394 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4395 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4396 case -NFS4ERR_BADSESSION:
4397 case -NFS4ERR_BADSLOT:
4398 case -NFS4ERR_BAD_HIGH_SLOT:
4399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4400 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4401 nfs4_schedule_state_recovery(server->nfs_client);
4402 goto out;
965b5d67
TM		 4403 case -ERESTARTSYS:
4404 /*
4405 * The show must go on: exit, but mark the
4406 * stateid as needing recovery.
4407 */
4408 case -NFS4ERR_ADMIN_REVOKED:
4409 case -NFS4ERR_BAD_STATEID:
4410 case -NFS4ERR_OPENMODE:
4411 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4412 err = 0;
4413 goto out;
4414 case -ENOMEM:
4415 case -NFS4ERR_DENIED:
4416 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4417 err = 0;
4418 goto out;
d5122201 4419 case -NFS4ERR_DELAY:
2c643488 4420 case -EKEYEXPIRED:
d5122201
TM		 4421 break;
4422 }
888e694c
TM		 4423 err = nfs4_handle_exception(server, err, &exception);
4424 } while (exception.retry);
4425out:
4426 return err;
4427}
6b3b5496 4428
d3c7b7cc
TM		 4429static void nfs4_release_lockowner_release(void *calldata)
4430{
4431 kfree(calldata);
4432}
4433
4434const struct rpc_call_ops nfs4_release_lockowner_ops = {
4435 .rpc_release = nfs4_release_lockowner_release,
4436};
4437
4438void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4439{
4440 struct nfs_server *server = lsp->ls_state->owner->so_server;
4441 struct nfs_release_lockowner_args *args;
4442 struct rpc_message msg = {
4443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4444 };
4445
4446 if (server->nfs_client->cl_mvops->minor_version != 0)
4447 return;
4448 args = kmalloc(sizeof(*args), GFP_NOFS);
4449 if (!args)
4450 return;
4451 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4452 args->lock_owner.id = lsp->ls_id.id;
4453 msg.rpc_argp = args;
4454 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4455}
4456
aa1870af
BF		 4457#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4458
6b3b5496
BF		 4459int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4460 size_t buflen, int flags)
4461{
4b580ee3
BF		 4462 struct inode *inode = dentry->d_inode;
4463
4464 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4465 return -EOPNOTSUPP;
4466
4b580ee3 4467 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4468}
4469
4470/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4471 * and that's what we'll do for e.g. user attributes that haven't been set.
4472 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4473 * attributes in kernel-managed attribute namespaces. */
4474ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4475 size_t buflen)
4476{
aa1870af
BF		 4477 struct inode *inode = dentry->d_inode;
4478
4479 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4480 return -EOPNOTSUPP;
4481
4482 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4483}
4484
4485ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4486{
aa1870af 4487 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4488
096455a2
BF		 4489 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4490 return 0;
6b3b5496
BF		 4491 if (buf && buflen < len)
4492 return -ERANGE;
4493 if (buf)
aa1870af
BF		 4494 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4495 return len;
6b3b5496
BF		 4496}
4497
69aaaae1
TM		 4498static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4499{
4500 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4501 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4502 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4503 return;
4504
4505 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4506 NFS_ATTR_FATTR_NLINK;
4507 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4508 fattr->nlink = 2;
4509}
4510
56659e99 4511int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4512 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4513{
4514 struct nfs_server *server = NFS_SERVER(dir);
4515 u32 bitmask[2] = {
361e624f
MN		 4516 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4517 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4518 };
4519 struct nfs4_fs_locations_arg args = {
4520 .dir_fh = NFS_FH(dir),
c228fd3a 4521 .name = name,
683b57b4
TM		 4522 .page = page,
4523 .bitmask = bitmask,
4524 };
22958463
BH		 4525 struct nfs4_fs_locations_res res = {
4526 .fs_locations = fs_locations,
4527 };
683b57b4
TM		 4528 struct rpc_message msg = {
4529 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4530 .rpc_argp = &args,
22958463 4531 .rpc_resp = &res,
683b57b4
TM		 4532 };
4533 int status;
4534
3110ff80 4535 dprintk("%s: start\n", __func__);
c228fd3a 4536 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4537 fs_locations->server = server;
830b8e33 4538 fs_locations->nlocations = 0;
cccef3b9 4539 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4540 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4541 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4542 return status;
4543}
4544
557134a3 4545#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4546/*
4547 * nfs4_proc_exchange_id()
4548 *
4549 * Since the clientid has expired, all compounds using sessions
4550 * associated with the stale clientid will be returning
4551 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4552 * be in some phase of session reset.
4553 */
4d643d1d 4554int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4555{
4556 nfs4_verifier verifier;
4557 struct nfs41_exchange_id_args args = {
4558 .client = clp,
4559 .flags = clp->cl_exchange_flags,
4560 };
4561 struct nfs41_exchange_id_res res = {
4562 .client = clp,
4563 };
4564 int status;
4565 struct rpc_message msg = {
4566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4567 .rpc_argp = &args,
4568 .rpc_resp = &res,
4569 .rpc_cred = cred,
4570 };
4571 __be32 *p;
4572
4573 dprintk("--> %s\n", __func__);
4574 BUG_ON(clp == NULL);
a7b72103 4575
7b183d0d
AB		 4576 /* Remove server-only flags */
4577 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4578
99fe60d0
BH		 4579 p = (u32 *)verifier.data;
4580 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4581 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4582 args.verifier = &verifier;
4583
4584 while (1) {
4585 args.id_len = scnprintf(args.id, sizeof(args.id),
4586 "%s/%s %u",
4587 clp->cl_ipaddr,
4588 rpc_peeraddr2str(clp->cl_rpcclient,
4589 RPC_DISPLAY_ADDR),
4590 clp->cl_id_uniquifier);
4591
4592 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4593
180b62a3 4594 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4595 break;
4596
4597 if (signalled())
4598 break;
4599
4600 if (++clp->cl_id_uniquifier == 0)
4601 break;
4602 }
4603
4604 dprintk("<-- %s status= %d\n", __func__, status);
4605 return status;
4606}
4607
2050f0cc
AA		 4608struct nfs4_get_lease_time_data {
4609 struct nfs4_get_lease_time_args *args;
4610 struct nfs4_get_lease_time_res *res;
4611 struct nfs_client *clp;
4612};
4613
4614static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4615 void *calldata)
4616{
4617 int ret;
4618 struct nfs4_get_lease_time_data *data =
4619 (struct nfs4_get_lease_time_data *)calldata;
4620
4621 dprintk("--> %s\n", __func__);
689cf5c1 4622 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4623 /* just setup sequence, do not trigger session recovery
4624 since we're invoked within one */
4625 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4626 &data->args->la_seq_args,
4627 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4628
4629 BUG_ON(ret == -EAGAIN);
4630 rpc_call_start(task);
4631 dprintk("<-- %s\n", __func__);
4632}
4633
4634/*
4635 * Called from nfs4_state_manager thread for session setup, so don't recover
4636 * from sequence operation or clientid errors.
4637 */
4638static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4639{
4640 struct nfs4_get_lease_time_data *data =
4641 (struct nfs4_get_lease_time_data *)calldata;
4642
4643 dprintk("--> %s\n", __func__);
14516c3a
TM		 4644 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4645 return;
2050f0cc
AA		 4646 switch (task->tk_status) {
4647 case -NFS4ERR_DELAY:
4648 case -NFS4ERR_GRACE:
2c643488 4649 case -EKEYEXPIRED:
2050f0cc
AA		 4650 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4651 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4652 task->tk_status = 0;
0110ee15 4653 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4654 return;
4655 }
2050f0cc
AA		 4656 dprintk("<-- %s\n", __func__);
4657}
4658
4659struct rpc_call_ops nfs4_get_lease_time_ops = {
4660 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4661 .rpc_call_done = nfs4_get_lease_time_done,
4662};
4663
4664int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4665{
4666 struct rpc_task *task;
4667 struct nfs4_get_lease_time_args args;
4668 struct nfs4_get_lease_time_res res = {
4669 .lr_fsinfo = fsinfo,
4670 };
4671 struct nfs4_get_lease_time_data data = {
4672 .args = &args,
4673 .res = &res,
4674 .clp = clp,
4675 };
4676 struct rpc_message msg = {
4677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4678 .rpc_argp = &args,
4679 .rpc_resp = &res,
4680 };
4681 struct rpc_task_setup task_setup = {
4682 .rpc_client = clp->cl_rpcclient,
4683 .rpc_message = &msg,
4684 .callback_ops = &nfs4_get_lease_time_ops,
4685 .callback_data = &data
4686 };
4687 int status;
4688
4689 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4690 dprintk("--> %s\n", __func__);
4691 task = rpc_run_task(&task_setup);
4692
4693 if (IS_ERR(task))
4694 status = PTR_ERR(task);
4695 else {
4696 status = task->tk_status;
4697 rpc_put_task(task);
4698 }
4699 dprintk("<-- %s return %d\n", __func__, status);
4700
4701 return status;
4702}
4703
b73dafa7
RL		 4704/*
4705 * Reset a slot table
4706 */
104aeba4
AA		 4707static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4708 int ivalue)
ac72b7b3 4709{
104aeba4 4710 struct nfs4_slot *new = NULL;
b73dafa7 4711 int i;
ac72b7b3
AA		 4712 int ret = 0;
4713
104aeba4
AA		 4714 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4715 max_reqs, tbl->max_slots);
ac72b7b3 4716
104aeba4
AA		 4717 /* Does the newly negotiated max_reqs match the existing slot table? */
4718 if (max_reqs != tbl->max_slots) {
4719 ret = -ENOMEM;
4720 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4721 GFP_NOFS);
104aeba4
AA		 4722 if (!new)
4723 goto out;
4724 ret = 0;
4725 kfree(tbl->slots);
ac72b7b3
AA		 4726 }
4727 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4728 if (new) {
4729 tbl->slots = new;
4730 tbl->max_slots = max_reqs;
4731 }
4732 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4733 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4734 spin_unlock(&tbl->slot_tbl_lock);
4735 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4736 tbl, tbl->slots, tbl->max_slots);
4737out:
4738 dprintk("<-- %s: return %d\n", __func__, ret);
4739 return ret;
4740}
4741
b73dafa7
RL		 4742/*
4743 * Reset the forechannel and backchannel slot tables
4744 */
4745static int nfs4_reset_slot_tables(struct nfs4_session *session)
4746{
4747 int status;
4748
4749 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4750 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4751 if (status)
4752 return status;
4753
4754 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4755 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4756 return status;
4757}
4758
f8625a6a
RL		 4759/* Destroy the slot table */
4760static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4761{
4762 if (session->fc_slot_table.slots != NULL) {
4763 kfree(session->fc_slot_table.slots);
4764 session->fc_slot_table.slots = NULL;
4765 }
4766 if (session->bc_slot_table.slots != NULL) {
4767 kfree(session->bc_slot_table.slots);
4768 session->bc_slot_table.slots = NULL;
4769 }
4770 return;
4771}
4772
fc931582
AA		 4773/*
4774 * Initialize slot table
4775 */
050047ce
RL		 4776static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4777 int max_slots, int ivalue)
fc931582 4778{
fc931582
AA		 4779 struct nfs4_slot *slot;
4780 int ret = -ENOMEM;
4781
4782 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4783
050047ce 4784 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4785
8535b2be 4786 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4787 if (!slot)
4788 goto out;
fc931582
AA		 4789 ret = 0;
4790
4791 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4792 tbl->max_slots = max_slots;
4793 tbl->slots = slot;
4794 tbl->highest_used_slotid = -1; /* no slot is currently used */
4795 spin_unlock(&tbl->slot_tbl_lock);
4796 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4797 tbl, tbl->slots, tbl->max_slots);
4798out:
4799 dprintk("<-- %s: return %d\n", __func__, ret);
4800 return ret;
fc931582
AA		 4801}
4802
050047ce
RL		 4803/*
4804 * Initialize the forechannel and backchannel tables
4805 */
4806static int nfs4_init_slot_tables(struct nfs4_session *session)
4807{
f26468fb
TM		 4808 struct nfs4_slot_table *tbl;
4809 int status = 0;
050047ce 4810
f26468fb
TM		 4811 tbl = &session->fc_slot_table;
4812 if (tbl->slots == NULL) {
4813 status = nfs4_init_slot_table(tbl,
4814 session->fc_attrs.max_reqs, 1);
4815 if (status)
4816 return status;
4817 }
050047ce 4818
f26468fb
TM		 4819 tbl = &session->bc_slot_table;
4820 if (tbl->slots == NULL) {
4821 status = nfs4_init_slot_table(tbl,
4822 session->bc_attrs.max_reqs, 0);
4823 if (status)
4824 nfs4_destroy_slot_tables(session);
4825 }
f8625a6a
RL		 4826
4827 return status;
557134a3
AA		 4828}
4829
4830struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4831{
4832 struct nfs4_session *session;
4833 struct nfs4_slot_table *tbl;
4834
8535b2be 4835 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4836 if (!session)
4837 return NULL;
76db6d95 4838
ea028ac9 4839 init_completion(&session->complete);
76db6d95 4840
557134a3 4841 tbl = &session->fc_slot_table;
9dfdf404 4842 tbl->highest_used_slotid = -1;
557134a3 4843 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4844 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4845
4846 tbl = &session->bc_slot_table;
9dfdf404 4847 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4848 spin_lock_init(&tbl->slot_tbl_lock);
4849 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4850
1055d76d
TM		 4851 session->session_state = 1<<NFS4_SESSION_INITING;
4852
557134a3
AA		 4853 session->clp = clp;
4854 return session;
4855}
4856
4857void nfs4_destroy_session(struct nfs4_session *session)
4858{
5a0ffe54
AA		 4859 nfs4_proc_destroy_session(session);
4860 dprintk("%s Destroy backchannel for xprt %p\n",
4861 __func__, session->clp->cl_rpcclient->cl_xprt);
4862 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4863 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4864 nfs4_destroy_slot_tables(session);
557134a3
AA		 4865 kfree(session);
4866}
4867
fc931582
AA		 4868/*
4869 * Initialize the values to be used by the client in CREATE_SESSION
4870 * If nfs4_init_session set the fore channel request and response sizes,
4871 * use them.
4872 *
4873 * Set the back channel max_resp_sz_cached to zero to force the client to
4874 * always set csa_cachethis to FALSE because the current implementation
4875 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4876 */
4877static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4878{
4879 struct nfs4_session *session = args->client->cl_session;
4880 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4881 mxresp_sz = session->fc_attrs.max_resp_sz;
4882
4883 if (mxrqst_sz == 0)
4884 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4885 if (mxresp_sz == 0)
4886 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4887 /* Fore channel attributes */
4888 args->fc_attrs.headerpadsz = 0;
4889 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4890 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4891 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4892 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4893
4894 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4895 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4896 __func__,
4897 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4898 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4899
4900 /* Back channel attributes */
4901 args->bc_attrs.headerpadsz = 0;
4902 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4903 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4904 args->bc_attrs.max_resp_sz_cached = 0;
4905 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4906 args->bc_attrs.max_reqs = 1;
4907
4908 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4909 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4910 __func__,
4911 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4912 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4913 args->bc_attrs.max_reqs);
4914}
4915
8d35301d
AA		 4916static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4917{
4918 if (rcvd <= sent)
4919 return 0;
4920 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4921 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4922 return -EINVAL;
4923}
4924
4925#define _verify_fore_channel_attr(_name_) \
4926 _verify_channel_attr("fore", #_name_, \
4927 args->fc_attrs._name_, \
4928 session->fc_attrs._name_)
4929
4930#define _verify_back_channel_attr(_name_) \
4931 _verify_channel_attr("back", #_name_, \
4932 args->bc_attrs._name_, \
4933 session->bc_attrs._name_)
4934
4935/*
4936 * The server is not allowed to increase the fore channel header pad size,
4937 * maximum response size, or maximum number of operations.
4938 *
4939 * The back channel attributes are only negotiatied down: We send what the
4940 * (back channel) server insists upon.
4941 */
4942static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4943 struct nfs4_session *session)
4944{
4945 int ret = 0;
4946
4947 ret |= _verify_fore_channel_attr(headerpadsz);
4948 ret |= _verify_fore_channel_attr(max_resp_sz);
4949 ret |= _verify_fore_channel_attr(max_ops);
4950
4951 ret |= _verify_back_channel_attr(headerpadsz);
4952 ret |= _verify_back_channel_attr(max_rqst_sz);
4953 ret |= _verify_back_channel_attr(max_resp_sz);
4954 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4955 ret |= _verify_back_channel_attr(max_ops);
4956 ret |= _verify_back_channel_attr(max_reqs);
4957
4958 return ret;
4959}
4960
fc931582
AA		 4961static int _nfs4_proc_create_session(struct nfs_client *clp)
4962{
4963 struct nfs4_session *session = clp->cl_session;
4964 struct nfs41_create_session_args args = {
4965 .client = clp,
4966 .cb_program = NFS4_CALLBACK,
4967 };
4968 struct nfs41_create_session_res res = {
4969 .client = clp,
4970 };
4971 struct rpc_message msg = {
4972 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4973 .rpc_argp = &args,
4974 .rpc_resp = &res,
4975 };
4976 int status;
4977
4978 nfs4_init_channel_attrs(&args);
0f91421e 4979 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4980
4981 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4982
8d35301d
AA		 4983 if (!status)
4984 /* Verify the session's negotiated channel_attrs values */
4985 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4986 if (!status) {
4987 /* Increment the clientid slot sequence id */
4988 clp->cl_seqid++;
4989 }
4990
4991 return status;
4992}
4993
4994/*
4995 * Issues a CREATE_SESSION operation to the server.
4996 * It is the responsibility of the caller to verify the session is
4997 * expired before calling this routine.
4998 */
f26468fb 4999int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5000{
5001 int status;
5002 unsigned *ptr;
fc931582
AA		 5003 struct nfs4_session *session = clp->cl_session;
5004
5005 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5006
5007 status = _nfs4_proc_create_session(clp);
5008 if (status)
5009 goto out;
5010
f26468fb
TM		 5011 /* Init and reset the fore channel */
5012 status = nfs4_init_slot_tables(session);
5013 dprintk("slot table initialization returned %d\n", status);
5014 if (status)
5015 goto out;
5016 status = nfs4_reset_slot_tables(session);
5017 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5018 if (status)
5019 goto out;
5020
5021 ptr = (unsigned *)&session->sess_id.data[0];
5022 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5023 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5024out:
5025 dprintk("<-- %s\n", __func__);
5026 return status;
5027}
5028
0f3e66c6
AA		 5029/*
5030 * Issue the over-the-wire RPC DESTROY_SESSION.
5031 * The caller must serialize access to this routine.
5032 */
5033int nfs4_proc_destroy_session(struct nfs4_session *session)
5034{
5035 int status = 0;
5036 struct rpc_message msg;
5037
5038 dprintk("--> nfs4_proc_destroy_session\n");
5039
5040 /* session is still being setup */
5041 if (session->clp->cl_cons_state != NFS_CS_READY)
5042 return status;
5043
5044 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5045 msg.rpc_argp = session;
5046 msg.rpc_resp = NULL;
5047 msg.rpc_cred = NULL;
5048 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5049
5050 if (status)
5051 printk(KERN_WARNING
5052 "Got error %d from the server on DESTROY_SESSION. "
5053 "Session has been destroyed regardless...\n", status);
5054
5055 dprintk("<-- nfs4_proc_destroy_session\n");
5056 return status;
5057}
5058
fccba804
TM		 5059int nfs4_init_session(struct nfs_server *server)
5060{
5061 struct nfs_client *clp = server->nfs_client;
2449ea2e 5062 struct nfs4_session *session;
68bf05ef 5063 unsigned int rsize, wsize;
fccba804
TM		 5064 int ret;
5065
5066 if (!nfs4_has_session(clp))
5067 return 0;
5068
1055d76d
TM		 5069 session = clp->cl_session;
5070 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5071 return 0;
5072
68bf05ef
AA		 5073 rsize = server->rsize;
5074 if (rsize == 0)
5075 rsize = NFS_MAX_FILE_IO_SIZE;
5076 wsize = server->wsize;
5077 if (wsize == 0)
5078 wsize = NFS_MAX_FILE_IO_SIZE;
5079
68bf05ef
AA		 5080 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5081 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5082
fccba804
TM		 5083 ret = nfs4_recover_expired_lease(server);
5084 if (!ret)
5085 ret = nfs4_check_client_ready(clp);
5086 return ret;
5087}
5088
fc01cea9
AA		 5089/*
5090 * Renew the cl_session lease.
5091 */
d5f8d3fe
TM		 5092struct nfs4_sequence_data {
5093 struct nfs_client *clp;
5094 struct nfs4_sequence_args args;
5095 struct nfs4_sequence_res res;
5096};
5097
dc96aef9
AB		 5098static void nfs41_sequence_release(void *data)
5099{
d5f8d3fe
TM		 5100 struct nfs4_sequence_data *calldata = data;
5101 struct nfs_client *clp = calldata->clp;
dc96aef9 5102
7135840f
AB		 5103 if (atomic_read(&clp->cl_count) > 1)
5104 nfs4_schedule_state_renewal(clp);
5105 nfs_put_client(clp);
d5f8d3fe 5106 kfree(calldata);
dc96aef9
AB		 5107}
5108
aa5190d0
TM		 5109static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5110{
5111 switch(task->tk_status) {
5112 case -NFS4ERR_DELAY:
5113 case -EKEYEXPIRED:
5114 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5115 return -EAGAIN;
5116 default:
5117 nfs4_schedule_state_recovery(clp);
5118 }
5119 return 0;
5120}
5121
dc96aef9 5122static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5123{
d5f8d3fe
TM		 5124 struct nfs4_sequence_data *calldata = data;
5125 struct nfs_client *clp = calldata->clp;
fc01cea9 5126
14516c3a
TM		 5127 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5128 return;
fc01cea9
AA		 5129
5130 if (task->tk_status < 0) {
5131 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5132 if (atomic_read(&clp->cl_count) == 1)
5133 goto out;
fc01cea9 5134
aa5190d0
TM		 5135 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5136 rpc_restart_call_prepare(task);
fc01cea9
AA		 5137 return;
5138 }
5139 }
fc01cea9 5140 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5141out:
fc01cea9
AA		 5142 dprintk("<-- %s\n", __func__);
5143}
5144
5145static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5146{
d5f8d3fe
TM		 5147 struct nfs4_sequence_data *calldata = data;
5148 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5149 struct nfs4_sequence_args *args;
5150 struct nfs4_sequence_res *res;
5151
fc01cea9
AA		 5152 args = task->tk_msg.rpc_argp;
5153 res = task->tk_msg.rpc_resp;
5154
035168ab 5155 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5156 return;
5157 rpc_call_start(task);
5158}
5159
5160static const struct rpc_call_ops nfs41_sequence_ops = {
5161 .rpc_call_done = nfs41_sequence_call_done,
5162 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5163 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5164};
5165
71ac6da9 5166static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5167{
d5f8d3fe 5168 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5169 struct rpc_message msg = {
5170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5171 .rpc_cred = cred,
5172 };
71ac6da9
TM		 5173 struct rpc_task_setup task_setup_data = {
5174 .rpc_client = clp->cl_rpcclient,
5175 .rpc_message = &msg,
5176 .callback_ops = &nfs41_sequence_ops,
5177 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5178 };
fc01cea9 5179
7135840f 5180 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5181 return ERR_PTR(-EIO);
d5f8d3fe
TM		 5182 calldata = kmalloc(sizeof(*calldata), GFP_NOFS);
5183 if (calldata == NULL) {
7135840f 5184 nfs_put_client(clp);
71ac6da9 5185 return ERR_PTR(-ENOMEM);
fc01cea9 5186 }
d5f8d3fe
TM		 5187 calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5188 msg.rpc_argp = &calldata->args;
5189 msg.rpc_resp = &calldata->res;
5190 calldata->clp = clp;
71ac6da9 5191 task_setup_data.callback_data = calldata;
fc01cea9 5192
71ac6da9
TM		 5193 return rpc_run_task(&task_setup_data);
5194}
5195
5196static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5197{
5198 struct rpc_task *task;
5199 int ret = 0;
5200
5201 task = _nfs41_proc_sequence(clp, cred);
5202 if (IS_ERR(task))
5203 ret = PTR_ERR(task);
5204 else
5205 rpc_put_task(task);
5206 dprintk("<-- %s status=%d\n", __func__, ret);
5207 return ret;
5208}
5209
5210static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5211{
5212 struct rpc_task *task;
5213 int ret;
5214
5215 task = _nfs41_proc_sequence(clp, cred);
5216 if (IS_ERR(task)) {
5217 ret = PTR_ERR(task);
5218 goto out;
5219 }
5220 ret = rpc_wait_for_completion_task(task);
5221 if (!ret)
5222 ret = task->tk_status;
5223 rpc_put_task(task);
5224out:
5225 dprintk("<-- %s status=%d\n", __func__, ret);
5226 return ret;
fc01cea9
AA		 5227}
5228
fce5c838
RL		 5229struct nfs4_reclaim_complete_data {
5230 struct nfs_client *clp;
5231 struct nfs41_reclaim_complete_args arg;
5232 struct nfs41_reclaim_complete_res res;
5233};
5234
5235static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5236{
5237 struct nfs4_reclaim_complete_data *calldata = data;
5238
b257957e 5239 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5240 if (nfs41_setup_sequence(calldata->clp->cl_session,
5241 &calldata->arg.seq_args,
fce5c838
RL		 5242 &calldata->res.seq_res, 0, task))
5243 return;
5244
5245 rpc_call_start(task);
5246}
5247
aa5190d0
TM		 5248static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5249{
5250 switch(task->tk_status) {
5251 case 0:
5252 case -NFS4ERR_COMPLETE_ALREADY:
5253 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5254 break;
5255 case -NFS4ERR_DELAY:
5256 case -EKEYEXPIRED:
5257 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5258 return -EAGAIN;
5259 default:
5260 nfs4_schedule_state_recovery(clp);
5261 }
5262 return 0;
5263}
5264
fce5c838
RL		 5265static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5266{
5267 struct nfs4_reclaim_complete_data *calldata = data;
5268 struct nfs_client *clp = calldata->clp;
5269 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5270
5271 dprintk("--> %s\n", __func__);
14516c3a
TM		 5272 if (!nfs41_sequence_done(task, res))
5273 return;
fce5c838 5274
aa5190d0
TM		 5275 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5276 rpc_restart_call_prepare(task);
5277 return;
5278 }
fce5c838
RL		 5279 dprintk("<-- %s\n", __func__);
5280}
5281
5282static void nfs4_free_reclaim_complete_data(void *data)
5283{
5284 struct nfs4_reclaim_complete_data *calldata = data;
5285
5286 kfree(calldata);
5287}
5288
5289static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5290 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5291 .rpc_call_done = nfs4_reclaim_complete_done,
5292 .rpc_release = nfs4_free_reclaim_complete_data,
5293};
5294
5295/*
5296 * Issue a global reclaim complete.
5297 */
5298static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5299{
5300 struct nfs4_reclaim_complete_data *calldata;
5301 struct rpc_task *task;
5302 struct rpc_message msg = {
5303 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5304 };
5305 struct rpc_task_setup task_setup_data = {
5306 .rpc_client = clp->cl_rpcclient,
5307 .rpc_message = &msg,
5308 .callback_ops = &nfs4_reclaim_complete_call_ops,
5309 .flags = RPC_TASK_ASYNC,
5310 };
5311 int status = -ENOMEM;
5312
5313 dprintk("--> %s\n", __func__);
8535b2be 5314 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5315 if (calldata == NULL)
5316 goto out;
5317 calldata->clp = clp;
5318 calldata->arg.one_fs = 0;
5319 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5320
5321 msg.rpc_argp = &calldata->arg;
5322 msg.rpc_resp = &calldata->res;
5323 task_setup_data.callback_data = calldata;
5324 task = rpc_run_task(&task_setup_data);
acf82b85 5325 if (IS_ERR(task)) {
fce5c838 5326 status = PTR_ERR(task);
acf82b85
DC		 5327 goto out;
5328 }
fce5c838 5329 rpc_put_task(task);
acf82b85 5330 return 0;
fce5c838
RL		 5331out:
5332 dprintk("<-- %s status=%d\n", __func__, status);
5333 return status;
5334}
557134a3
AA		 5335#endif /* CONFIG_NFS_V4_1 */
5336
591d71cb 5337struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5338 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5339 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5340 .recover_open = nfs4_open_reclaim,
5341 .recover_lock = nfs4_lock_reclaim,
591d71cb 5342 .establish_clid = nfs4_init_clientid,
90a16617 5343 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5344};
5345
591d71cb
AA		 5346#if defined(CONFIG_NFS_V4_1)
5347struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5348 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5349 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5350 .recover_open = nfs4_open_reclaim,
5351 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5352 .establish_clid = nfs41_init_clientid,
b4b82607 5353 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5354 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5355};
5356#endif /* CONFIG_NFS_V4_1 */
5357
5358struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5359 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5360 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5361 .recover_open = nfs4_open_expired,
5362 .recover_lock = nfs4_lock_expired,
5363 .establish_clid = nfs4_init_clientid,
90a16617 5364 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5365};
5366
5367#if defined(CONFIG_NFS_V4_1)
5368struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5369 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5370 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5371 .recover_open = nfs4_open_expired,
5372 .recover_lock = nfs4_lock_expired,
4d643d1d 5373 .establish_clid = nfs41_init_clientid,
b4b82607 5374 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5375};
591d71cb 5376#endif /* CONFIG_NFS_V4_1 */
1da177e4 5377
29fba38b
BH		 5378struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5379 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5380 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5381 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5382};
5383
5384#if defined(CONFIG_NFS_V4_1)
5385struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5386 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5387 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5388 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5389};
5390#endif
5391
97dc1359
TM		 5392static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5393 .minor_version = 0,
5394 .call_sync = _nfs4_call_sync,
e047a10c 5395 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5396 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5397 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5398 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5399};
5400
5401#if defined(CONFIG_NFS_V4_1)
5402static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5403 .minor_version = 1,
5404 .call_sync = _nfs4_call_sync_session,
e047a10c 5405 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5406 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5407 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5408 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5409};
5410#endif
5411
97dc1359
TM		 5412const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5413 [0] = &nfs_v4_0_minor_ops,
5414#if defined(CONFIG_NFS_V4_1)
5415 [1] = &nfs_v4_1_minor_ops,
5416#endif
5417};
5418
92e1d5be 5419static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5420 .permission = nfs_permission,
5421 .getattr = nfs_getattr,
5422 .setattr = nfs_setattr,
5423 .getxattr = nfs4_getxattr,
5424 .setxattr = nfs4_setxattr,
5425 .listxattr = nfs4_listxattr,
5426};
5427
509de811 5428const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5429 .version = 4, /* protocol version */
5430 .dentry_ops = &nfs4_dentry_operations,
5431 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5432 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5433 .getroot = nfs4_proc_get_root,
5434 .getattr = nfs4_proc_getattr,
5435 .setattr = nfs4_proc_setattr,
2b3de441 5436 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5437 .lookup = nfs4_proc_lookup,
5438 .access = nfs4_proc_access,
5439 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5440 .create = nfs4_proc_create,
5441 .remove = nfs4_proc_remove,
5442 .unlink_setup = nfs4_proc_unlink_setup,
5443 .unlink_done = nfs4_proc_unlink_done,
5444 .rename = nfs4_proc_rename,
5445 .link = nfs4_proc_link,
5446 .symlink = nfs4_proc_symlink,
5447 .mkdir = nfs4_proc_mkdir,
5448 .rmdir = nfs4_proc_remove,
5449 .readdir = nfs4_proc_readdir,
5450 .mknod = nfs4_proc_mknod,
5451 .statfs = nfs4_proc_statfs,
5452 .fsinfo = nfs4_proc_fsinfo,
5453 .pathconf = nfs4_proc_pathconf,
e9326dca 5454 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5455 .decode_dirent = nfs4_decode_dirent,
5456 .read_setup = nfs4_proc_read_setup,
ec06c096 5457 .read_done = nfs4_read_done,
1da177e4 5458 .write_setup = nfs4_proc_write_setup,
788e7a89 5459 .write_done = nfs4_write_done,
1da177e4 5460 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5461 .commit_done = nfs4_commit_done,
1da177e4 5462 .lock = nfs4_proc_lock,
e50a1c2e 5463 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5464 .close_context = nfs4_close_context,
1da177e4
LT		 5465};
5466
5467/*
5468 * Local variables:
5469 * c-basic-offset: 8
5470 * End:
5471 */
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