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NFSv4: Further cleanups for nfs4_open_revalidate()
[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
f46e0bd3 2027struct inode *
cd9a1c0e 2028nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2029{
1da177e4 2030 struct nfs4_state *state;
1da177e4 2031
565277f6 2032 /* Protect against concurrent sillydeletes */
cd9a1c0e 2033 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2034 if (IS_ERR(state))
2035 return ERR_CAST(state);
cd9a1c0e 2036 ctx->state = state;
f46e0bd3 2037 return igrab(state->inode);
1da177e4
LT		 2038}
2039
1185a552 2040static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2041{
2042 if (ctx->state == NULL)
2043 return;
2044 if (is_sync)
2045 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2046 else
2047 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2048}
1da177e4
LT		 2049
2050static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2051{
43652ad5
BH		 2052 struct nfs4_server_caps_arg args = {
2053 .fhandle = fhandle,
2054 };
1da177e4
LT		 2055 struct nfs4_server_caps_res res = {};
2056 struct rpc_message msg = {
2057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2058 .rpc_argp = &args,
1da177e4
LT		 2059 .rpc_resp = &res,
2060 };
2061 int status;
2062
cccef3b9 2063 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2064 if (status == 0) {
2065 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2066 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2067 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2068 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2069 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2070 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2071 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2072 server->caps |= NFS_CAP_ACLS;
2073 if (res.has_links != 0)
2074 server->caps |= NFS_CAP_HARDLINKS;
2075 if (res.has_symlinks != 0)
2076 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2077 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2078 server->caps |= NFS_CAP_FILEID;
2079 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2080 server->caps |= NFS_CAP_MODE;
2081 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2082 server->caps |= NFS_CAP_NLINK;
2083 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2084 server->caps |= NFS_CAP_OWNER;
2085 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2086 server->caps |= NFS_CAP_OWNER_GROUP;
2087 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2088 server->caps |= NFS_CAP_ATIME;
2089 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2090 server->caps |= NFS_CAP_CTIME;
2091 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2092 server->caps |= NFS_CAP_MTIME;
2093
a65318bf
TM		 2094 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2095 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2096 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2097 server->acl_bitmask = res.acl_bitmask;
2098 }
cccef3b9 2099
1da177e4
LT		 2100 return status;
2101}
2102
55a97593 2103int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2104{
2105 struct nfs4_exception exception = { };
2106 int err;
2107 do {
2108 err = nfs4_handle_exception(server,
2109 _nfs4_server_capabilities(server, fhandle),
2110 &exception);
2111 } while (exception.retry);
2112 return err;
2113}
2114
2115static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2116 struct nfs_fsinfo *info)
2117{
1da177e4
LT		 2118 struct nfs4_lookup_root_arg args = {
2119 .bitmask = nfs4_fattr_bitmap,
2120 };
2121 struct nfs4_lookup_res res = {
2122 .server = server,
0e574af1 2123 .fattr = info->fattr,
1da177e4
LT		 2124 .fh = fhandle,
2125 };
2126 struct rpc_message msg = {
2127 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2128 .rpc_argp = &args,
2129 .rpc_resp = &res,
2130 };
008f55d0 2131
0e574af1 2132 nfs_fattr_init(info->fattr);
fccba804 2133 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2134}
2135
2136static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2137 struct nfs_fsinfo *info)
2138{
2139 struct nfs4_exception exception = { };
2140 int err;
2141 do {
2142 err = nfs4_handle_exception(server,
2143 _nfs4_lookup_root(server, fhandle, info),
2144 &exception);
2145 } while (exception.retry);
2146 return err;
2147}
2148
54ceac45
DH		 2149/*
2150 * get the file handle for the "/" directory on the server
2151 */
1da177e4 2152static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2153 struct nfs_fsinfo *info)
1da177e4 2154{
1da177e4
LT		 2155 int status;
2156
1da177e4 2157 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2158 if (status == 0)
2159 status = nfs4_server_capabilities(server, fhandle);
2160 if (status == 0)
2161 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2162 return nfs4_map_errors(status);
1da177e4
LT		 2163}
2164
6b97fd3d
MN		 2165/*
2166 * Get locations and (maybe) other attributes of a referral.
2167 * Note that we'll actually follow the referral later when
2168 * we detect fsid mismatch in inode revalidation
2169 */
56659e99 2170static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2171{
2172 int status = -ENOMEM;
2173 struct page *page = NULL;
2174 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2175
2176 page = alloc_page(GFP_KERNEL);
2177 if (page == NULL)
2178 goto out;
2179 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2180 if (locations == NULL)
2181 goto out;
2182
c228fd3a 2183 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2184 if (status != 0)
2185 goto out;
2186 /* Make sure server returned a different fsid for the referral */
2187 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2188 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2189 status = -EIO;
2190 goto out;
2191 }
2192
2193 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2194 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2195 if (!fattr->mode)
2196 fattr->mode = S_IFDIR;
2197 memset(fhandle, 0, sizeof(struct nfs_fh));
2198out:
2199 if (page)
2200 __free_page(page);
5d7ca35a 2201 kfree(locations);
6b97fd3d
MN		 2202 return status;
2203}
2204
1da177e4
LT		 2205static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2206{
2207 struct nfs4_getattr_arg args = {
2208 .fh = fhandle,
2209 .bitmask = server->attr_bitmask,
2210 };
2211 struct nfs4_getattr_res res = {
2212 .fattr = fattr,
2213 .server = server,
2214 };
2215 struct rpc_message msg = {
2216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2217 .rpc_argp = &args,
2218 .rpc_resp = &res,
2219 };
2220
0e574af1 2221 nfs_fattr_init(fattr);
cccef3b9 2222 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2223}
2224
2225static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2226{
2227 struct nfs4_exception exception = { };
2228 int err;
2229 do {
2230 err = nfs4_handle_exception(server,
2231 _nfs4_proc_getattr(server, fhandle, fattr),
2232 &exception);
2233 } while (exception.retry);
2234 return err;
2235}
2236
2237/*
2238 * The file is not closed if it is opened due to the a request to change
2239 * the size of the file. The open call will not be needed once the
2240 * VFS layer lookup-intents are implemented.
2241 *
2242 * Close is called when the inode is destroyed.
2243 * If we haven't opened the file for O_WRONLY, we
2244 * need to in the size_change case to obtain a stateid.
2245 *
2246 * Got race?
2247 * Because OPEN is always done by name in nfsv4, it is
2248 * possible that we opened a different file by the same
2249 * name. We can recognize this race condition, but we
2250 * can't do anything about it besides returning an error.
2251 *
2252 * This will be fixed with VFS changes (lookup-intent).
2253 */
2254static int
2255nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2256 struct iattr *sattr)
2257{
08e9eac4 2258 struct inode *inode = dentry->d_inode;
659bfcd6 2259 struct rpc_cred *cred = NULL;
d530838b 2260 struct nfs4_state *state = NULL;
1da177e4
LT		 2261 int status;
2262
0e574af1 2263 nfs_fattr_init(fattr);
1da177e4 2264
d530838b 2265 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2266 if (sattr->ia_valid & ATTR_FILE) {
2267 struct nfs_open_context *ctx;
2268
2269 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2270 if (ctx) {
2271 cred = ctx->cred;
2272 state = ctx->state;
2273 }
659bfcd6 2274 }
08e9eac4 2275
659bfcd6 2276 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2277 if (status == 0)
2278 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2279 return status;
2280}
2281
56659e99
TM		 2282static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2283 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2284 struct nfs_fattr *fattr)
2285{
2286 int status;
2287 struct nfs4_lookup_arg args = {
2288 .bitmask = server->attr_bitmask,
2289 .dir_fh = dirfh,
2290 .name = name,
2291 };
2292 struct nfs4_lookup_res res = {
2293 .server = server,
2294 .fattr = fattr,
2295 .fh = fhandle,
2296 };
2297 struct rpc_message msg = {
2298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2299 .rpc_argp = &args,
2300 .rpc_resp = &res,
2301 };
2302
2303 nfs_fattr_init(fattr);
2304
2305 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2306 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2307 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2308 return status;
2309}
2310
2311static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2312 struct qstr *name, struct nfs_fh *fhandle,
2313 struct nfs_fattr *fattr)
2314{
2315 struct nfs4_exception exception = { };
2316 int err;
2317 do {
4e56e082
TM		 2318 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2319 /* FIXME: !!!! */
2320 if (err == -NFS4ERR_MOVED) {
2321 err = -EREMOTE;
2322 break;
2323 }
2324 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2325 } while (exception.retry);
2326 return err;
2327}
2328
56659e99 2329static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2330 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2331{
4e56e082 2332 int status;
1da177e4
LT		 2333
2334 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2335 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2336 if (status == -NFS4ERR_MOVED)
2337 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2338 dprintk("NFS reply lookup: %d\n", status);
2339 return status;
2340}
2341
2342static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2343{
2344 struct nfs4_exception exception = { };
2345 int err;
2346 do {
2347 err = nfs4_handle_exception(NFS_SERVER(dir),
2348 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2349 &exception);
2350 } while (exception.retry);
2351 return err;
2352}
2353
2354static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2355{
76b32999 2356 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2357 struct nfs4_accessargs args = {
2358 .fh = NFS_FH(inode),
76b32999
TM		 2359 .bitmask = server->attr_bitmask,
2360 };
2361 struct nfs4_accessres res = {
2362 .server = server,
1da177e4 2363 };
1da177e4
LT		 2364 struct rpc_message msg = {
2365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2366 .rpc_argp = &args,
2367 .rpc_resp = &res,
2368 .rpc_cred = entry->cred,
2369 };
2370 int mode = entry->mask;
2371 int status;
2372
2373 /*
2374 * Determine which access bits we want to ask for...
2375 */
2376 if (mode & MAY_READ)
2377 args.access |= NFS4_ACCESS_READ;
2378 if (S_ISDIR(inode->i_mode)) {
2379 if (mode & MAY_WRITE)
2380 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2381 if (mode & MAY_EXEC)
2382 args.access |= NFS4_ACCESS_LOOKUP;
2383 } else {
2384 if (mode & MAY_WRITE)
2385 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2386 if (mode & MAY_EXEC)
2387 args.access |= NFS4_ACCESS_EXECUTE;
2388 }
c407d41a
TM		 2389
2390 res.fattr = nfs_alloc_fattr();
2391 if (res.fattr == NULL)
2392 return -ENOMEM;
2393
cccef3b9 2394 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2395 if (!status) {
2396 entry->mask = 0;
2397 if (res.access & NFS4_ACCESS_READ)
2398 entry->mask |= MAY_READ;
2399 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2400 entry->mask |= MAY_WRITE;
2401 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2402 entry->mask |= MAY_EXEC;
c407d41a 2403 nfs_refresh_inode(inode, res.fattr);
1da177e4 2404 }
c407d41a 2405 nfs_free_fattr(res.fattr);
1da177e4
LT		 2406 return status;
2407}
2408
2409static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2410{
2411 struct nfs4_exception exception = { };
2412 int err;
2413 do {
2414 err = nfs4_handle_exception(NFS_SERVER(inode),
2415 _nfs4_proc_access(inode, entry),
2416 &exception);
2417 } while (exception.retry);
2418 return err;
2419}
2420
2421/*
2422 * TODO: For the time being, we don't try to get any attributes
2423 * along with any of the zero-copy operations READ, READDIR,
2424 * READLINK, WRITE.
2425 *
2426 * In the case of the first three, we want to put the GETATTR
2427 * after the read-type operation -- this is because it is hard
2428 * to predict the length of a GETATTR response in v4, and thus
2429 * align the READ data correctly. This means that the GETATTR
2430 * may end up partially falling into the page cache, and we should
2431 * shift it into the 'tail' of the xdr_buf before processing.
2432 * To do this efficiently, we need to know the total length
2433 * of data received, which doesn't seem to be available outside
2434 * of the RPC layer.
2435 *
2436 * In the case of WRITE, we also want to put the GETATTR after
2437 * the operation -- in this case because we want to make sure
2438 * we get the post-operation mtime and size. This means that
2439 * we can't use xdr_encode_pages() as written: we need a variant
2440 * of it which would leave room in the 'tail' iovec.
2441 *
2442 * Both of these changes to the XDR layer would in fact be quite
2443 * minor, but I decided to leave them for a subsequent patch.
2444 */
2445static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2446 unsigned int pgbase, unsigned int pglen)
2447{
2448 struct nfs4_readlink args = {
2449 .fh = NFS_FH(inode),
2450 .pgbase = pgbase,
2451 .pglen = pglen,
2452 .pages = &page,
2453 };
f50c7000 2454 struct nfs4_readlink_res res;
1da177e4
LT		 2455 struct rpc_message msg = {
2456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2457 .rpc_argp = &args,
f50c7000 2458 .rpc_resp = &res,
1da177e4
LT		 2459 };
2460
cccef3b9 2461 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2462}
2463
2464static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2465 unsigned int pgbase, unsigned int pglen)
2466{
2467 struct nfs4_exception exception = { };
2468 int err;
2469 do {
2470 err = nfs4_handle_exception(NFS_SERVER(inode),
2471 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2472 &exception);
2473 } while (exception.retry);
2474 return err;
2475}
2476
1da177e4
LT		 2477/*
2478 * Got race?
2479 * We will need to arrange for the VFS layer to provide an atomic open.
2480 * Until then, this create/open method is prone to inefficiency and race
2481 * conditions due to the lookup, create, and open VFS calls from sys_open()
2482 * placed on the wire.
2483 *
2484 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2485 * The file will be opened again in the subsequent VFS open call
2486 * (nfs4_proc_file_open).
2487 *
2488 * The open for read will just hang around to be used by any process that
2489 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2490 */
2491
2492static int
2493nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2494 int flags, struct nameidata *nd)
1da177e4 2495{
ad389da7 2496 struct path path = {
4ac91378 2497 .mnt = nd->path.mnt,
ad389da7
TM		 2498 .dentry = dentry,
2499 };
1da177e4
LT		 2500 struct nfs4_state *state;
2501 struct rpc_cred *cred;
dc0b027d 2502 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2503 int status = 0;
2504
98a8e323 2505 cred = rpc_lookup_cred();
1da177e4
LT		 2506 if (IS_ERR(cred)) {
2507 status = PTR_ERR(cred);
2508 goto out;
2509 }
dc0b027d 2510 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2511 d_drop(dentry);
1da177e4
LT		 2512 if (IS_ERR(state)) {
2513 status = PTR_ERR(state);
659bfcd6 2514 goto out_putcred;
1da177e4 2515 }
d4d9cdcb 2516 d_add(dentry, igrab(state->inode));
d75340cc 2517 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
ad389da7 2518 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2519 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2520 else
dc0b027d 2521 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2522out_putcred:
2523 put_rpccred(cred);
1da177e4
LT		 2524out:
2525 return status;
2526}
2527
2528static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2529{
16e42959 2530 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2531 struct nfs_removeargs args = {
1da177e4 2532 .fh = NFS_FH(dir),
4fdc17b2
TM		 2533 .name.len = name->len,
2534 .name.name = name->name,
16e42959
TM		 2535 .bitmask = server->attr_bitmask,
2536 };
4fdc17b2 2537 struct nfs_removeres res = {
16e42959 2538 .server = server,
1da177e4 2539 };
1da177e4 2540 struct rpc_message msg = {
4fdc17b2
TM		 2541 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2542 .rpc_argp = &args,
2543 .rpc_resp = &res,
1da177e4 2544 };
d346890b
TM		 2545 int status = -ENOMEM;
2546
2547 res.dir_attr = nfs_alloc_fattr();
2548 if (res.dir_attr == NULL)
2549 goto out;
1da177e4 2550
cccef3b9 2551 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2552 if (status == 0) {
2553 update_changeattr(dir, &res.cinfo);
d346890b 2554 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2555 }
d346890b
TM		 2556 nfs_free_fattr(res.dir_attr);
2557out:
1da177e4
LT		 2558 return status;
2559}
2560
2561static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2562{
2563 struct nfs4_exception exception = { };
2564 int err;
2565 do {
2566 err = nfs4_handle_exception(NFS_SERVER(dir),
2567 _nfs4_proc_remove(dir, name),
2568 &exception);
2569 } while (exception.retry);
2570 return err;
2571}
2572
e4eff1a6 2573static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2574{
e4eff1a6
TM		 2575 struct nfs_server *server = NFS_SERVER(dir);
2576 struct nfs_removeargs *args = msg->rpc_argp;
2577 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2578
a65318bf 2579 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2580 res->server = server;
1da177e4 2581 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2582}
2583
e4eff1a6 2584static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2585{
e4eff1a6
TM		 2586 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2587
14516c3a
TM		 2588 if (!nfs4_sequence_done(task, &res->seq_res))
2589 return 0;
9e33bed5 2590 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2591 return 0;
2592 update_changeattr(dir, &res->cinfo);
d346890b 2593 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2594 return 1;
1da177e4
LT		 2595}
2596
2597static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2598 struct inode *new_dir, struct qstr *new_name)
2599{
6caf2c82 2600 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2601 struct nfs4_rename_arg arg = {
2602 .old_dir = NFS_FH(old_dir),
2603 .new_dir = NFS_FH(new_dir),
2604 .old_name = old_name,
2605 .new_name = new_name,
6caf2c82
TM		 2606 .bitmask = server->attr_bitmask,
2607 };
6caf2c82
TM		 2608 struct nfs4_rename_res res = {
2609 .server = server,
1da177e4 2610 };
1da177e4
LT		 2611 struct rpc_message msg = {
2612 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2613 .rpc_argp = &arg,
2614 .rpc_resp = &res,
2615 };
011fff72 2616 int status = -ENOMEM;
1da177e4 2617
011fff72
TM		 2618 res.old_fattr = nfs_alloc_fattr();
2619 res.new_fattr = nfs_alloc_fattr();
2620 if (res.old_fattr == NULL || res.new_fattr == NULL)
2621 goto out;
1da177e4 2622
011fff72 2623 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2624 if (!status) {
2625 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2626 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2627 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2628 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2629 }
011fff72
TM		 2630out:
2631 nfs_free_fattr(res.new_fattr);
2632 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2633 return status;
2634}
2635
2636static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2637 struct inode *new_dir, struct qstr *new_name)
2638{
2639 struct nfs4_exception exception = { };
2640 int err;
2641 do {
2642 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2643 _nfs4_proc_rename(old_dir, old_name,
2644 new_dir, new_name),
2645 &exception);
2646 } while (exception.retry);
2647 return err;
2648}
2649
2650static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2651{
91ba2eee 2652 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2653 struct nfs4_link_arg arg = {
2654 .fh = NFS_FH(inode),
2655 .dir_fh = NFS_FH(dir),
2656 .name = name,
91ba2eee
TM		 2657 .bitmask = server->attr_bitmask,
2658 };
91ba2eee
TM		 2659 struct nfs4_link_res res = {
2660 .server = server,
1da177e4 2661 };
1da177e4
LT		 2662 struct rpc_message msg = {
2663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2664 .rpc_argp = &arg,
91ba2eee 2665 .rpc_resp = &res,
1da177e4 2666 };
136f2627
TM		 2667 int status = -ENOMEM;
2668
2669 res.fattr = nfs_alloc_fattr();
2670 res.dir_attr = nfs_alloc_fattr();
2671 if (res.fattr == NULL || res.dir_attr == NULL)
2672 goto out;
1da177e4 2673
cccef3b9 2674 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2675 if (!status) {
2676 update_changeattr(dir, &res.cinfo);
2677 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2678 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2679 }
136f2627
TM		 2680out:
2681 nfs_free_fattr(res.dir_attr);
2682 nfs_free_fattr(res.fattr);
1da177e4
LT		 2683 return status;
2684}
2685
2686static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2687{
2688 struct nfs4_exception exception = { };
2689 int err;
2690 do {
2691 err = nfs4_handle_exception(NFS_SERVER(inode),
2692 _nfs4_proc_link(inode, dir, name),
2693 &exception);
2694 } while (exception.retry);
2695 return err;
2696}
2697
57dc9a57
TM		 2698struct nfs4_createdata {
2699 struct rpc_message msg;
2700 struct nfs4_create_arg arg;
2701 struct nfs4_create_res res;
2702 struct nfs_fh fh;
2703 struct nfs_fattr fattr;
2704 struct nfs_fattr dir_fattr;
2705};
2706
2707static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2708 struct qstr *name, struct iattr *sattr, u32 ftype)
2709{
2710 struct nfs4_createdata *data;
2711
2712 data = kzalloc(sizeof(*data), GFP_KERNEL);
2713 if (data != NULL) {
2714 struct nfs_server *server = NFS_SERVER(dir);
2715
2716 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2717 data->msg.rpc_argp = &data->arg;
2718 data->msg.rpc_resp = &data->res;
2719 data->arg.dir_fh = NFS_FH(dir);
2720 data->arg.server = server;
2721 data->arg.name = name;
2722 data->arg.attrs = sattr;
2723 data->arg.ftype = ftype;
2724 data->arg.bitmask = server->attr_bitmask;
2725 data->res.server = server;
2726 data->res.fh = &data->fh;
2727 data->res.fattr = &data->fattr;
2728 data->res.dir_fattr = &data->dir_fattr;
2729 nfs_fattr_init(data->res.fattr);
2730 nfs_fattr_init(data->res.dir_fattr);
2731 }
2732 return data;
2733}
2734
2735static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2736{
cccef3b9
AA		 2737 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2738 &data->arg, &data->res, 1);
57dc9a57
TM		 2739 if (status == 0) {
2740 update_changeattr(dir, &data->res.dir_cinfo);
2741 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2742 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2743 }
2744 return status;
2745}
2746
2747static void nfs4_free_createdata(struct nfs4_createdata *data)
2748{
2749 kfree(data);
2750}
2751
4f390c15 2752static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2753 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2754{
57dc9a57
TM		 2755 struct nfs4_createdata *data;
2756 int status = -ENAMETOOLONG;
1da177e4 2757
94a6d753 2758 if (len > NFS4_MAXPATHLEN)
57dc9a57 2759 goto out;
4f390c15 2760
57dc9a57
TM		 2761 status = -ENOMEM;
2762 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2763 if (data == NULL)
2764 goto out;
2765
2766 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2767 data->arg.u.symlink.pages = &page;
2768 data->arg.u.symlink.len = len;
1da177e4 2769
57dc9a57
TM		 2770 status = nfs4_do_create(dir, dentry, data);
2771
2772 nfs4_free_createdata(data);
2773out:
1da177e4
LT		 2774 return status;
2775}
2776
4f390c15 2777static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2778 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2779{
2780 struct nfs4_exception exception = { };
2781 int err;
2782 do {
2783 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2784 _nfs4_proc_symlink(dir, dentry, page,
2785 len, sattr),
1da177e4
LT		 2786 &exception);
2787 } while (exception.retry);
2788 return err;
2789}
2790
2791static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2792 struct iattr *sattr)
2793{
57dc9a57
TM		 2794 struct nfs4_createdata *data;
2795 int status = -ENOMEM;
1da177e4 2796
57dc9a57
TM		 2797 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2798 if (data == NULL)
2799 goto out;
2800
2801 status = nfs4_do_create(dir, dentry, data);
2802
2803 nfs4_free_createdata(data);
2804out:
1da177e4
LT		 2805 return status;
2806}
2807
2808static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2809 struct iattr *sattr)
2810{
2811 struct nfs4_exception exception = { };
2812 int err;
2813 do {
2814 err = nfs4_handle_exception(NFS_SERVER(dir),
2815 _nfs4_proc_mkdir(dir, dentry, sattr),
2816 &exception);
2817 } while (exception.retry);
2818 return err;
2819}
2820
2821static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2822 u64 cookie, struct page *page, unsigned int count, int plus)
2823{
2824 struct inode *dir = dentry->d_inode;
2825 struct nfs4_readdir_arg args = {
2826 .fh = NFS_FH(dir),
2827 .pages = &page,
2828 .pgbase = 0,
2829 .count = count,
96d25e53 2830 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2831 };
2832 struct nfs4_readdir_res res;
2833 struct rpc_message msg = {
2834 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2835 .rpc_argp = &args,
2836 .rpc_resp = &res,
2837 .rpc_cred = cred,
2838 };
2839 int status;
2840
3110ff80 2841 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2842 dentry->d_parent->d_name.name,
2843 dentry->d_name.name,
2844 (unsigned long long)cookie);
1da177e4
LT		 2845 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2846 res.pgbase = args.pgbase;
cccef3b9 2847 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2848 if (status == 0)
2849 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2850
2851 nfs_invalidate_atime(dir);
2852
3110ff80 2853 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2854 return status;
2855}
2856
2857static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2858 u64 cookie, struct page *page, unsigned int count, int plus)
2859{
2860 struct nfs4_exception exception = { };
2861 int err;
2862 do {
2863 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2864 _nfs4_proc_readdir(dentry, cred, cookie,
2865 page, count, plus),
2866 &exception);
2867 } while (exception.retry);
2868 return err;
2869}
2870
2871static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2872 struct iattr *sattr, dev_t rdev)
2873{
57dc9a57
TM		 2874 struct nfs4_createdata *data;
2875 int mode = sattr->ia_mode;
2876 int status = -ENOMEM;
1da177e4
LT		 2877
2878 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2879 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2880
2881 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2882 if (data == NULL)
2883 goto out;
2884
1da177e4 2885 if (S_ISFIFO(mode))
57dc9a57 2886 data->arg.ftype = NF4FIFO;
1da177e4 2887 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2888 data->arg.ftype = NF4BLK;
2889 data->arg.u.device.specdata1 = MAJOR(rdev);
2890 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2891 }
2892 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2893 data->arg.ftype = NF4CHR;
2894 data->arg.u.device.specdata1 = MAJOR(rdev);
2895 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2896 }
1da177e4 2897
57dc9a57
TM		 2898 status = nfs4_do_create(dir, dentry, data);
2899
2900 nfs4_free_createdata(data);
2901out:
1da177e4
LT		 2902 return status;
2903}
2904
2905static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2906 struct iattr *sattr, dev_t rdev)
2907{
2908 struct nfs4_exception exception = { };
2909 int err;
2910 do {
2911 err = nfs4_handle_exception(NFS_SERVER(dir),
2912 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2913 &exception);
2914 } while (exception.retry);
2915 return err;
2916}
2917
2918static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2919 struct nfs_fsstat *fsstat)
2920{
2921 struct nfs4_statfs_arg args = {
2922 .fh = fhandle,
2923 .bitmask = server->attr_bitmask,
2924 };
24ad148a
BH		 2925 struct nfs4_statfs_res res = {
2926 .fsstat = fsstat,
2927 };
1da177e4
LT		 2928 struct rpc_message msg = {
2929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2930 .rpc_argp = &args,
24ad148a 2931 .rpc_resp = &res,
1da177e4
LT		 2932 };
2933
0e574af1 2934 nfs_fattr_init(fsstat->fattr);
cccef3b9 2935 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2936}
2937
2938static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2939{
2940 struct nfs4_exception exception = { };
2941 int err;
2942 do {
2943 err = nfs4_handle_exception(server,
2944 _nfs4_proc_statfs(server, fhandle, fsstat),
2945 &exception);
2946 } while (exception.retry);
2947 return err;
2948}
2949
2950static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2951 struct nfs_fsinfo *fsinfo)
2952{
2953 struct nfs4_fsinfo_arg args = {
2954 .fh = fhandle,
2955 .bitmask = server->attr_bitmask,
2956 };
3dda5e43
BH		 2957 struct nfs4_fsinfo_res res = {
2958 .fsinfo = fsinfo,
2959 };
1da177e4
LT		 2960 struct rpc_message msg = {
2961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2962 .rpc_argp = &args,
3dda5e43 2963 .rpc_resp = &res,
1da177e4
LT		 2964 };
2965
cccef3b9 2966 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2967}
2968
2969static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2970{
2971 struct nfs4_exception exception = { };
2972 int err;
2973
2974 do {
2975 err = nfs4_handle_exception(server,
2976 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2977 &exception);
2978 } while (exception.retry);
2979 return err;
2980}
2981
2982static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2983{
0e574af1 2984 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2985 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2986}
2987
2988static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2989 struct nfs_pathconf *pathconf)
2990{
2991 struct nfs4_pathconf_arg args = {
2992 .fh = fhandle,
2993 .bitmask = server->attr_bitmask,
2994 };
d45b2989
BH		 2995 struct nfs4_pathconf_res res = {
2996 .pathconf = pathconf,
2997 };
1da177e4
LT		 2998 struct rpc_message msg = {
2999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3000 .rpc_argp = &args,
d45b2989 3001 .rpc_resp = &res,
1da177e4
LT		 3002 };
3003
3004 /* None of the pathconf attributes are mandatory to implement */
3005 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3006 memset(pathconf, 0, sizeof(*pathconf));
3007 return 0;
3008 }
3009
0e574af1 3010 nfs_fattr_init(pathconf->fattr);
cccef3b9 3011 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3012}
3013
3014static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3015 struct nfs_pathconf *pathconf)
3016{
3017 struct nfs4_exception exception = { };
3018 int err;
3019
3020 do {
3021 err = nfs4_handle_exception(server,
3022 _nfs4_proc_pathconf(server, fhandle, pathconf),
3023 &exception);
3024 } while (exception.retry);
3025 return err;
3026}
3027
ec06c096 3028static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3029{
ec06c096 3030 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3031
f11c88af
AA		 3032 dprintk("--> %s\n", __func__);
3033
14516c3a
TM		 3034 if (!nfs4_sequence_done(task, &data->res.seq_res))
3035 return -EAGAIN;
f11c88af 3036
9e33bed5 3037 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3038 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3039 return -EAGAIN;
1da177e4 3040 }
8850df99
TM		 3041
3042 nfs_invalidate_atime(data->inode);
1da177e4 3043 if (task->tk_status > 0)
ec06c096
TM		 3044 renew_lease(server, data->timestamp);
3045 return 0;
1da177e4
LT		 3046}
3047
bdc7f021 3048static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3049{
1da177e4 3050 data->timestamp = jiffies;
bdc7f021 3051 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3052}
3053
788e7a89 3054static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3055{
1da177e4
LT		 3056 struct inode *inode = data->inode;
3057
14516c3a
TM		 3058 if (!nfs4_sequence_done(task, &data->res.seq_res))
3059 return -EAGAIN;
def6ed7e 3060
9e33bed5 3061 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3062 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3063 return -EAGAIN;
1da177e4 3064 }
4f9838c7 3065 if (task->tk_status >= 0) {
1da177e4 3066 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3067 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3068 }
788e7a89 3069 return 0;
1da177e4
LT		 3070}
3071
bdc7f021 3072static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3073{
bdc7f021
TM		 3074 struct nfs_server *server = NFS_SERVER(data->inode);
3075
a65318bf 3076 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3077 data->res.server = server;
1da177e4
LT		 3078 data->timestamp = jiffies;
3079
bdc7f021 3080 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3081}
3082
788e7a89 3083static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3084{
1da177e4
LT		 3085 struct inode *inode = data->inode;
3086
14516c3a
TM		 3087 if (!nfs4_sequence_done(task, &data->res.seq_res))
3088 return -EAGAIN;
3089
9e33bed5 3090 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3091 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3092 return -EAGAIN;
1da177e4 3093 }
9e08a3c5 3094 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3095 return 0;
1da177e4
LT		 3096}
3097
bdc7f021 3098static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3099{
788e7a89 3100 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3101
a65318bf 3102 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3103 data->res.server = server;
bdc7f021 3104 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3105}
3106
9bc4e3ca
CL		 3107struct nfs4_renewdata {
3108 struct nfs_client *client;
3109 unsigned long timestamp;
3110};
3111
1da177e4
LT		 3112/*
3113 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3114 * standalone procedure for queueing an asynchronous RENEW.
3115 */
9bc4e3ca 3116static void nfs4_renew_release(void *calldata)
dc96aef9 3117{
9bc4e3ca
CL		 3118 struct nfs4_renewdata *data = calldata;
3119 struct nfs_client *clp = data->client;
dc96aef9 3120
0851de06
AB		 3121 if (atomic_read(&clp->cl_count) > 1)
3122 nfs4_schedule_state_renewal(clp);
3123 nfs_put_client(clp);
9bc4e3ca 3124 kfree(data);
dc96aef9
AB		 3125}
3126
9bc4e3ca 3127static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3128{
9bc4e3ca
CL		 3129 struct nfs4_renewdata *data = calldata;
3130 struct nfs_client *clp = data->client;
3131 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3132
3133 if (task->tk_status < 0) {
95baa25c
TM		 3134 /* Unless we're shutting down, schedule state recovery! */
3135 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3136 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3137 return;
3138 }
452e9352 3139 do_renew_lease(clp, timestamp);
1da177e4
LT		 3140}
3141
963d8fe5
TM		 3142static const struct rpc_call_ops nfs4_renew_ops = {
3143 .rpc_call_done = nfs4_renew_done,
dc96aef9 3144 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3145};
3146
adfa6f98 3147int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3148{
3149 struct rpc_message msg = {
3150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3151 .rpc_argp = clp,
b4454fe1 3152 .rpc_cred = cred,
1da177e4 3153 };
9bc4e3ca 3154 struct nfs4_renewdata *data;
1da177e4 3155
0851de06
AB		 3156 if (!atomic_inc_not_zero(&clp->cl_count))
3157 return -EIO;
9bc4e3ca
CL		 3158 data = kmalloc(sizeof(*data), GFP_KERNEL);
3159 if (data == NULL)
3160 return -ENOMEM;
3161 data->client = clp;
3162 data->timestamp = jiffies;
1da177e4 3163 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3164 &nfs4_renew_ops, data);
1da177e4
LT		 3165}
3166
adfa6f98 3167int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3168{
3169 struct rpc_message msg = {
3170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3171 .rpc_argp = clp,
b4454fe1 3172 .rpc_cred = cred,
1da177e4
LT		 3173 };
3174 unsigned long now = jiffies;
3175 int status;
3176
3177 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3178 if (status < 0)
3179 return status;
452e9352 3180 do_renew_lease(clp, now);
1da177e4
LT		 3181 return 0;
3182}
3183
aa1870af
BF		 3184static inline int nfs4_server_supports_acls(struct nfs_server *server)
3185{
3186 return (server->caps & NFS_CAP_ACLS)
3187 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3188 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3189}
3190
3191/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3192 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3193 * the stack.
3194 */
3195#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3196
3197static void buf_to_pages(const void *buf, size_t buflen,
3198 struct page **pages, unsigned int *pgbase)
3199{
3200 const void *p = buf;
3201
3202 *pgbase = offset_in_page(buf);
3203 p -= *pgbase;
3204 while (p < buf + buflen) {
3205 *(pages++) = virt_to_page(p);
3206 p += PAGE_CACHE_SIZE;
3207 }
3208}
3209
e50a1c2e
BF		 3210struct nfs4_cached_acl {
3211 int cached;
3212 size_t len;
3e9d4154 3213 char data[0];
e50a1c2e
BF		 3214};
3215
3216static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3217{
3218 struct nfs_inode *nfsi = NFS_I(inode);
3219
3220 spin_lock(&inode->i_lock);
3221 kfree(nfsi->nfs4_acl);
3222 nfsi->nfs4_acl = acl;
3223 spin_unlock(&inode->i_lock);
3224}
3225
3226static void nfs4_zap_acl_attr(struct inode *inode)
3227{
3228 nfs4_set_cached_acl(inode, NULL);
3229}
3230
3231static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3232{
3233 struct nfs_inode *nfsi = NFS_I(inode);
3234 struct nfs4_cached_acl *acl;
3235 int ret = -ENOENT;
3236
3237 spin_lock(&inode->i_lock);
3238 acl = nfsi->nfs4_acl;
3239 if (acl == NULL)
3240 goto out;
3241 if (buf == NULL) /* user is just asking for length */
3242 goto out_len;
3243 if (acl->cached == 0)
3244 goto out;
3245 ret = -ERANGE; /* see getxattr(2) man page */
3246 if (acl->len > buflen)
3247 goto out;
3248 memcpy(buf, acl->data, acl->len);
3249out_len:
3250 ret = acl->len;
3251out:
3252 spin_unlock(&inode->i_lock);
3253 return ret;
3254}
3255
3256static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3257{
3258 struct nfs4_cached_acl *acl;
3259
3260 if (buf && acl_len <= PAGE_SIZE) {
3261 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3262 if (acl == NULL)
3263 goto out;
3264 acl->cached = 1;
3265 memcpy(acl->data, buf, acl_len);
3266 } else {
3267 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3268 if (acl == NULL)
3269 goto out;
3270 acl->cached = 0;
3271 }
3272 acl->len = acl_len;
3273out:
3274 nfs4_set_cached_acl(inode, acl);
3275}
3276
16b4289c 3277static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3278{
aa1870af
BF		 3279 struct page *pages[NFS4ACL_MAXPAGES];
3280 struct nfs_getaclargs args = {
3281 .fh = NFS_FH(inode),
3282 .acl_pages = pages,
3283 .acl_len = buflen,
3284 };
663c79b3
BH		 3285 struct nfs_getaclres res = {
3286 .acl_len = buflen,
3287 };
e50a1c2e 3288 void *resp_buf;
aa1870af
BF		 3289 struct rpc_message msg = {
3290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3291 .rpc_argp = &args,
663c79b3 3292 .rpc_resp = &res,
aa1870af 3293 };
e50a1c2e 3294 struct page *localpage = NULL;
aa1870af
BF		 3295 int ret;
3296
e50a1c2e
BF		 3297 if (buflen < PAGE_SIZE) {
3298 /* As long as we're doing a round trip to the server anyway,
3299 * let's be prepared for a page of acl data. */
3300 localpage = alloc_page(GFP_KERNEL);
3301 resp_buf = page_address(localpage);
3302 if (localpage == NULL)
3303 return -ENOMEM;
3304 args.acl_pages[0] = localpage;
3305 args.acl_pgbase = 0;
663c79b3 3306 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3307 } else {
3308 resp_buf = buf;
3309 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3310 }
cccef3b9 3311 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3312 if (ret)
3313 goto out_free;
663c79b3
BH		 3314 if (res.acl_len > args.acl_len)
3315 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3316 else
663c79b3 3317 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3318 if (buf) {
3319 ret = -ERANGE;
663c79b3 3320 if (res.acl_len > buflen)
e50a1c2e
BF		 3321 goto out_free;
3322 if (localpage)
663c79b3 3323 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3324 }
663c79b3 3325 ret = res.acl_len;
e50a1c2e
BF		 3326out_free:
3327 if (localpage)
3328 __free_page(localpage);
aa1870af
BF		 3329 return ret;
3330}
3331
16b4289c
TM		 3332static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3333{
3334 struct nfs4_exception exception = { };
3335 ssize_t ret;
3336 do {
3337 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3338 if (ret >= 0)
3339 break;
3340 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3341 } while (exception.retry);
3342 return ret;
3343}
3344
e50a1c2e
BF		 3345static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3346{
3347 struct nfs_server *server = NFS_SERVER(inode);
3348 int ret;
3349
3350 if (!nfs4_server_supports_acls(server))
3351 return -EOPNOTSUPP;
3352 ret = nfs_revalidate_inode(server, inode);
3353 if (ret < 0)
3354 return ret;
3355 ret = nfs4_read_cached_acl(inode, buf, buflen);
3356 if (ret != -ENOENT)
3357 return ret;
3358 return nfs4_get_acl_uncached(inode, buf, buflen);
3359}
3360
16b4289c 3361static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3362{
3363 struct nfs_server *server = NFS_SERVER(inode);
3364 struct page *pages[NFS4ACL_MAXPAGES];
3365 struct nfs_setaclargs arg = {
3366 .fh = NFS_FH(inode),
3367 .acl_pages = pages,
3368 .acl_len = buflen,
3369 };
73c403a9 3370 struct nfs_setaclres res;
4b580ee3
BF		 3371 struct rpc_message msg = {
3372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3373 .rpc_argp = &arg,
73c403a9 3374 .rpc_resp = &res,
4b580ee3
BF		 3375 };
3376 int ret;
3377
3378 if (!nfs4_server_supports_acls(server))
3379 return -EOPNOTSUPP;
642ac549 3380 nfs_inode_return_delegation(inode);
4b580ee3 3381 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3382 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3383 nfs_access_zap_cache(inode);
3384 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3385 return ret;
3386}
3387
16b4289c
TM		 3388static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3389{
3390 struct nfs4_exception exception = { };
3391 int err;
3392 do {
3393 err = nfs4_handle_exception(NFS_SERVER(inode),
3394 __nfs4_proc_set_acl(inode, buf, buflen),
3395 &exception);
3396 } while (exception.retry);
3397 return err;
3398}
3399
1da177e4 3400static int
aa5190d0 3401nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3402{
aa5190d0
TM		 3403 struct nfs_client *clp = server->nfs_client;
3404
3405 if (task->tk_status >= 0)
1da177e4
LT		 3406 return 0;
3407 switch(task->tk_status) {
9e33bed5
TM		 3408 case -NFS4ERR_ADMIN_REVOKED:
3409 case -NFS4ERR_BAD_STATEID:
3410 case -NFS4ERR_OPENMODE:
3411 if (state == NULL)
3412 break;
3413 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3414 goto do_state_recovery;
1da177e4 3415 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3416 if (state == NULL)
3417 break;
3418 nfs4_state_mark_reclaim_reboot(clp, state);
3419 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3420 case -NFS4ERR_EXPIRED:
a2c0b9e2 3421 goto do_state_recovery;
4745e315
AA		 3422#if defined(CONFIG_NFS_V4_1)
3423 case -NFS4ERR_BADSESSION:
3424 case -NFS4ERR_BADSLOT:
3425 case -NFS4ERR_BAD_HIGH_SLOT:
3426 case -NFS4ERR_DEADSESSION:
3427 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3428 case -NFS4ERR_SEQ_FALSE_RETRY:
3429 case -NFS4ERR_SEQ_MISORDERED:
3430 dprintk("%s ERROR %d, Reset session\n", __func__,
3431 task->tk_status);
0b9e2d41 3432 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3433 task->tk_status = 0;
3434 return -EAGAIN;
3435#endif /* CONFIG_NFS_V4_1 */
1da177e4 3436 case -NFS4ERR_DELAY:
aa5190d0 3437 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3438 case -NFS4ERR_GRACE:
2c643488 3439 case -EKEYEXPIRED:
1da177e4
LT		 3440 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3441 task->tk_status = 0;
3442 return -EAGAIN;
3443 case -NFS4ERR_OLD_STATEID:
3444 task->tk_status = 0;
3445 return -EAGAIN;
3446 }
3447 task->tk_status = nfs4_map_errors(task->tk_status);
3448 return 0;
a2c0b9e2
TM		 3449do_state_recovery:
3450 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3451 nfs4_schedule_state_recovery(clp);
3452 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3453 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3454 task->tk_status = 0;
3455 return -EAGAIN;
1da177e4
LT		 3456}
3457
bb8b27e5
TM		 3458int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3459 unsigned short port, struct rpc_cred *cred,
3460 struct nfs4_setclientid_res *res)
1da177e4
LT		 3461{
3462 nfs4_verifier sc_verifier;
3463 struct nfs4_setclientid setclientid = {
3464 .sc_verifier = &sc_verifier,
3465 .sc_prog = program,
3466 };
3467 struct rpc_message msg = {
3468 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3469 .rpc_argp = &setclientid,
bb8b27e5 3470 .rpc_resp = res,
286d7d6a 3471 .rpc_cred = cred,
1da177e4 3472 };
bc4785cd 3473 __be32 *p;
1da177e4
LT		 3474 int loop = 0;
3475 int status;
3476
bc4785cd 3477 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3478 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3479 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3480
3481 for(;;) {
3482 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3483 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3484 clp->cl_ipaddr,
3485 rpc_peeraddr2str(clp->cl_rpcclient,
3486 RPC_DISPLAY_ADDR),
69dd716c
TM		 3487 rpc_peeraddr2str(clp->cl_rpcclient,
3488 RPC_DISPLAY_PROTO),
78ea323b 3489 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3490 clp->cl_id_uniquifier);
3491 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3492 sizeof(setclientid.sc_netid),
3493 rpc_peeraddr2str(clp->cl_rpcclient,
3494 RPC_DISPLAY_NETID));
1da177e4 3495 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3496 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3497 clp->cl_ipaddr, port >> 8, port & 255);
3498
3499 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3500 if (status != -NFS4ERR_CLID_INUSE)
3501 break;
3502 if (signalled())
3503 break;
3504 if (loop++ & 1)
3505 ssleep(clp->cl_lease_time + 1);
3506 else
3507 if (++clp->cl_id_uniquifier == 0)
3508 break;
3509 }
3510 return status;
3511}
3512
bb8b27e5
TM		 3513static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3514 struct nfs4_setclientid_res *arg,
3515 struct rpc_cred *cred)
1da177e4
LT		 3516{
3517 struct nfs_fsinfo fsinfo;
3518 struct rpc_message msg = {
3519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3520 .rpc_argp = arg,
1da177e4 3521 .rpc_resp = &fsinfo,
286d7d6a 3522 .rpc_cred = cred,
1da177e4
LT		 3523 };
3524 unsigned long now;
3525 int status;
3526
3527 now = jiffies;
3528 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3529 if (status == 0) {
3530 spin_lock(&clp->cl_lock);
3531 clp->cl_lease_time = fsinfo.lease_time * HZ;
3532 clp->cl_last_renewal = now;
3533 spin_unlock(&clp->cl_lock);
3534 }
3535 return status;
3536}
3537
bb8b27e5
TM		 3538int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3539 struct nfs4_setclientid_res *arg,
3540 struct rpc_cred *cred)
51581f3b 3541{
77e03677 3542 long timeout = 0;
51581f3b
TM		 3543 int err;
3544 do {
bb8b27e5 3545 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3546 switch (err) {
3547 case 0:
3548 return err;
3549 case -NFS4ERR_RESOURCE:
3550 /* The IBM lawyers misread another document! */
3551 case -NFS4ERR_DELAY:
2c643488 3552 case -EKEYEXPIRED:
51581f3b
TM		 3553 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3554 }
3555 } while (err == 0);
3556 return err;
3557}
3558
fe650407
TM		 3559struct nfs4_delegreturndata {
3560 struct nfs4_delegreturnargs args;
fa178f29 3561 struct nfs4_delegreturnres res;
fe650407
TM		 3562 struct nfs_fh fh;
3563 nfs4_stateid stateid;
26e976a8 3564 unsigned long timestamp;
fa178f29 3565 struct nfs_fattr fattr;
fe650407
TM		 3566 int rpc_status;
3567};
3568
fe650407
TM		 3569static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3570{
3571 struct nfs4_delegreturndata *data = calldata;
938e1010 3572
14516c3a
TM		 3573 if (!nfs4_sequence_done(task, &data->res.seq_res))
3574 return;
938e1010 3575
79708861
RL		 3576 switch (task->tk_status) {
3577 case -NFS4ERR_STALE_STATEID:
3578 case -NFS4ERR_EXPIRED:
3579 case 0:
fa178f29 3580 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3581 break;
3582 default:
3583 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3584 -EAGAIN) {
3585 nfs_restart_rpc(task, data->res.server->nfs_client);
3586 return;
3587 }
3588 }
3589 data->rpc_status = task->tk_status;
fe650407
TM		 3590}
3591
3592static void nfs4_delegreturn_release(void *calldata)
3593{
fe650407
TM		 3594 kfree(calldata);
3595}
3596
938e1010
AA		 3597#if defined(CONFIG_NFS_V4_1)
3598static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3599{
3600 struct nfs4_delegreturndata *d_data;
3601
3602 d_data = (struct nfs4_delegreturndata *)data;
3603
035168ab 3604 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3605 &d_data->args.seq_args,
3606 &d_data->res.seq_res, 1, task))
3607 return;
3608 rpc_call_start(task);
3609}
3610#endif /* CONFIG_NFS_V4_1 */
3611
c8d149f3 3612static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3613#if defined(CONFIG_NFS_V4_1)
3614 .rpc_call_prepare = nfs4_delegreturn_prepare,
3615#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3616 .rpc_call_done = nfs4_delegreturn_done,
3617 .rpc_release = nfs4_delegreturn_release,
3618};
3619
e6f81075 3620static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3621{
3622 struct nfs4_delegreturndata *data;
fa178f29 3623 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3624 struct rpc_task *task;
5138fde0
TM		 3625 struct rpc_message msg = {
3626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3627 .rpc_cred = cred,
3628 };
c970aa85
TM		 3629 struct rpc_task_setup task_setup_data = {
3630 .rpc_client = server->client,
5138fde0 3631 .rpc_message = &msg,
c970aa85
TM		 3632 .callback_ops = &nfs4_delegreturn_ops,
3633 .flags = RPC_TASK_ASYNC,
3634 };
e6f81075 3635 int status = 0;
fe650407 3636
8535b2be 3637 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3638 if (data == NULL)
3639 return -ENOMEM;
3640 data->args.fhandle = &data->fh;
3641 data->args.stateid = &data->stateid;
fa178f29 3642 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3643 nfs_copy_fh(&data->fh, NFS_FH(inode));
3644 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3645 data->res.fattr = &data->fattr;
3646 data->res.server = server;
5f7dbd5c 3647 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3648 nfs_fattr_init(data->res.fattr);
26e976a8 3649 data->timestamp = jiffies;
fe650407
TM		 3650 data->rpc_status = 0;
3651
c970aa85 3652 task_setup_data.callback_data = data;
5138fde0
TM		 3653 msg.rpc_argp = &data->args,
3654 msg.rpc_resp = &data->res,
c970aa85 3655 task = rpc_run_task(&task_setup_data);
7a1218a2 3656 if (IS_ERR(task))
fe650407 3657 return PTR_ERR(task);
e6f81075
TM		 3658 if (!issync)
3659 goto out;
fe650407 3660 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3661 if (status != 0)
3662 goto out;
3663 status = data->rpc_status;
3664 if (status != 0)
3665 goto out;
3666 nfs_refresh_inode(inode, &data->fattr);
3667out:
e6b3c4db 3668 rpc_put_task(task);
fe650407 3669 return status;
1da177e4
LT		 3670}
3671
e6f81075 3672int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3673{
3674 struct nfs_server *server = NFS_SERVER(inode);
3675 struct nfs4_exception exception = { };
3676 int err;
3677 do {
e6f81075 3678 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3679 switch (err) {
3680 case -NFS4ERR_STALE_STATEID:
3681 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3682 case 0:
3683 return 0;
3684 }
3685 err = nfs4_handle_exception(server, err, &exception);
3686 } while (exception.retry);
3687 return err;
3688}
3689
3690#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3691#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3692
3693/*
3694 * sleep, with exponential backoff, and retry the LOCK operation.
3695 */
3696static unsigned long
3697nfs4_set_lock_task_retry(unsigned long timeout)
3698{
150030b7 3699 schedule_timeout_killable(timeout);
1da177e4
LT		 3700 timeout <<= 1;
3701 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3702 return NFS4_LOCK_MAXTIMEOUT;
3703 return timeout;
3704}
3705
1da177e4
LT		 3706static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3707{
3708 struct inode *inode = state->inode;
3709 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3710 struct nfs_client *clp = server->nfs_client;
911d1aaf 3711 struct nfs_lockt_args arg = {
1da177e4 3712 .fh = NFS_FH(inode),
911d1aaf 3713 .fl = request,
1da177e4 3714 };
911d1aaf
TM		 3715 struct nfs_lockt_res res = {
3716 .denied = request,
1da177e4
LT		 3717 };
3718 struct rpc_message msg = {
3719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3720 .rpc_argp = &arg,
3721 .rpc_resp = &res,
3722 .rpc_cred = state->owner->so_cred,
3723 };
1da177e4
LT		 3724 struct nfs4_lock_state *lsp;
3725 int status;
3726
911d1aaf 3727 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3728 status = nfs4_set_lock_state(state, request);
3729 if (status != 0)
3730 goto out;
3731 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3732 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3733 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3734 switch (status) {
3735 case 0:
3736 request->fl_type = F_UNLCK;
3737 break;
3738 case -NFS4ERR_DENIED:
3739 status = 0;
1da177e4 3740 }
70cc6487 3741 request->fl_ops->fl_release_private(request);
8d0a8a9d 3742out:
1da177e4
LT		 3743 return status;
3744}
3745
3746static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3747{
3748 struct nfs4_exception exception = { };
3749 int err;
3750
3751 do {
3752 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3753 _nfs4_proc_getlk(state, cmd, request),
3754 &exception);
3755 } while (exception.retry);
3756 return err;
3757}
3758
3759static int do_vfs_lock(struct file *file, struct file_lock *fl)
3760{
3761 int res = 0;
3762 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3763 case FL_POSIX:
3764 res = posix_lock_file_wait(file, fl);
3765 break;
3766 case FL_FLOCK:
3767 res = flock_lock_file_wait(file, fl);
3768 break;
3769 default:
3770 BUG();
3771 }
1da177e4
LT		 3772 return res;
3773}
3774
faf5f49c 3775struct nfs4_unlockdata {
911d1aaf
TM		 3776 struct nfs_locku_args arg;
3777 struct nfs_locku_res res;
faf5f49c
TM		 3778 struct nfs4_lock_state *lsp;
3779 struct nfs_open_context *ctx;
911d1aaf
TM		 3780 struct file_lock fl;
3781 const struct nfs_server *server;
26e976a8 3782 unsigned long timestamp;
faf5f49c
TM		 3783};
3784
911d1aaf
TM		 3785static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3786 struct nfs_open_context *ctx,
3787 struct nfs4_lock_state *lsp,
3788 struct nfs_seqid *seqid)
3789{
3790 struct nfs4_unlockdata *p;
3791 struct inode *inode = lsp->ls_state->inode;
3792
8535b2be 3793 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3794 if (p == NULL)
3795 return NULL;
3796 p->arg.fh = NFS_FH(inode);
3797 p->arg.fl = &p->fl;
3798 p->arg.seqid = seqid;
c1d51931 3799 p->res.seqid = seqid;
5f7dbd5c 3800 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3801 p->arg.stateid = &lsp->ls_stateid;
3802 p->lsp = lsp;
3803 atomic_inc(&lsp->ls_count);
3804 /* Ensure we don't close file until we're done freeing locks! */
3805 p->ctx = get_nfs_open_context(ctx);
3806 memcpy(&p->fl, fl, sizeof(p->fl));
3807 p->server = NFS_SERVER(inode);
3808 return p;
3809}
3810
06f814a3 3811static void nfs4_locku_release_calldata(void *data)
faf5f49c 3812{
963d8fe5 3813 struct nfs4_unlockdata *calldata = data;
911d1aaf 3814 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3815 nfs4_put_lock_state(calldata->lsp);
3816 put_nfs_open_context(calldata->ctx);
3817 kfree(calldata);
faf5f49c
TM		 3818}
3819
963d8fe5 3820static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3821{
963d8fe5 3822 struct nfs4_unlockdata *calldata = data;
faf5f49c 3823
14516c3a
TM		 3824 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3825 return;
faf5f49c
TM		 3826 switch (task->tk_status) {
3827 case 0:
3828 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3829 calldata->res.stateid.data,
faf5f49c 3830 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3831 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3832 break;
9e33bed5
TM		 3833 case -NFS4ERR_BAD_STATEID:
3834 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3835 case -NFS4ERR_STALE_STATEID:
3836 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3837 break;
3838 default:
9e33bed5 3839 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3840 nfs_restart_rpc(task,
d61e612a 3841 calldata->server->nfs_client);
faf5f49c 3842 }
faf5f49c
TM		 3843}
3844
4ce70ada 3845static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3846{
4ce70ada 3847 struct nfs4_unlockdata *calldata = data;
faf5f49c 3848
911d1aaf 3849 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3850 return;
3851 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3852 /* Note: exit _without_ running nfs4_locku_done */
3853 task->tk_action = NULL;
faf5f49c
TM		 3854 return;
3855 }
26e976a8 3856 calldata->timestamp = jiffies;
035168ab 3857 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3858 &calldata->arg.seq_args,
3859 &calldata->res.seq_res, 1, task))
3860 return;
5138fde0 3861 rpc_call_start(task);
faf5f49c
TM		 3862}
3863
963d8fe5 3864static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3865 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3866 .rpc_call_done = nfs4_locku_done,
06f814a3 3867 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3868};
3869
a5d16a4d
TM		 3870static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3871 struct nfs_open_context *ctx,
3872 struct nfs4_lock_state *lsp,
3873 struct nfs_seqid *seqid)
3874{
3875 struct nfs4_unlockdata *data;
5138fde0
TM		 3876 struct rpc_message msg = {
3877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3878 .rpc_cred = ctx->cred,
3879 };
c970aa85
TM		 3880 struct rpc_task_setup task_setup_data = {
3881 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3882 .rpc_message = &msg,
c970aa85 3883 .callback_ops = &nfs4_locku_ops,
101070ca 3884 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3885 .flags = RPC_TASK_ASYNC,
3886 };
a5d16a4d 3887
137d6aca
FF		 3888 /* Ensure this is an unlock - when canceling a lock, the
3889 * canceled lock is passed in, and it won't be an unlock.
3890 */
3891 fl->fl_type = F_UNLCK;
3892
a5d16a4d
TM		 3893 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3894 if (data == NULL) {
3895 nfs_free_seqid(seqid);
3896 return ERR_PTR(-ENOMEM);
3897 }
3898
5138fde0
TM		 3899 msg.rpc_argp = &data->arg,
3900 msg.rpc_resp = &data->res,
c970aa85
TM		 3901 task_setup_data.callback_data = data;
3902 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3903}
3904
faf5f49c
TM		 3905static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3906{
19e03c57 3907 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3908 struct nfs_seqid *seqid;
1da177e4 3909 struct nfs4_lock_state *lsp;
06f814a3
TM		 3910 struct rpc_task *task;
3911 int status = 0;
536ff0f8 3912 unsigned char fl_flags = request->fl_flags;
faf5f49c 3913
8d0a8a9d 3914 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3915 /* Unlock _before_ we do the RPC call */
3916 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3917 down_read(&nfsi->rwsem);
3918 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3919 up_read(&nfsi->rwsem);
9b073574 3920 goto out;
19e03c57
TM		 3921 }
3922 up_read(&nfsi->rwsem);
8d0a8a9d 3923 if (status != 0)
9b073574
TM		 3924 goto out;
3925 /* Is this a delegated lock? */
3926 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3927 goto out;
8d0a8a9d 3928 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 3929 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 3930 status = -ENOMEM;
911d1aaf 3931 if (seqid == NULL)
9b073574 3932 goto out;
cd3758e3 3933 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3934 status = PTR_ERR(task);
3935 if (IS_ERR(task))
9b073574 3936 goto out;
a5d16a4d 3937 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3938 rpc_put_task(task);
9b073574 3939out:
536ff0f8 3940 request->fl_flags = fl_flags;
1da177e4
LT		 3941 return status;
3942}
3943
a5d16a4d
TM		 3944struct nfs4_lockdata {
3945 struct nfs_lock_args arg;
3946 struct nfs_lock_res res;
3947 struct nfs4_lock_state *lsp;
3948 struct nfs_open_context *ctx;
3949 struct file_lock fl;
26e976a8 3950 unsigned long timestamp;
a5d16a4d
TM		 3951 int rpc_status;
3952 int cancelled;
66179efe 3953 struct nfs_server *server;
a5d16a4d
TM		 3954};
3955
3956static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 3957 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
3958 gfp_t gfp_mask)
1da177e4 3959{
a5d16a4d
TM		 3960 struct nfs4_lockdata *p;
3961 struct inode *inode = lsp->ls_state->inode;
1da177e4 3962 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 3963
8535b2be 3964 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 3965 if (p == NULL)
3966 return NULL;
3967
3968 p->arg.fh = NFS_FH(inode);
3969 p->arg.fl = &p->fl;
8535b2be 3970 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 3971 if (p->arg.open_seqid == NULL)
3972 goto out_free;
8535b2be 3973 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 3974 if (p->arg.lock_seqid == NULL)
2f74c0a0 3975 goto out_free_seqid;
a5d16a4d 3976 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3977 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3978 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3979 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3980 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3981 p->lsp = lsp;
66179efe 3982 p->server = server;
a5d16a4d
TM		 3983 atomic_inc(&lsp->ls_count);
3984 p->ctx = get_nfs_open_context(ctx);
3985 memcpy(&p->fl, fl, sizeof(p->fl));
3986 return p;
2f74c0a0
TM		 3987out_free_seqid:
3988 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3989out_free:
3990 kfree(p);
3991 return NULL;
3992}
3993
3994static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3995{
3996 struct nfs4_lockdata *data = calldata;
3997 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3998
3110ff80 3999 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4000 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4001 return;
a5d16a4d
TM		 4002 /* Do we need to do an open_to_lock_owner? */
4003 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4004 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4005 return;
a5d16a4d
TM		 4006 data->arg.open_stateid = &state->stateid;
4007 data->arg.new_lock_owner = 1;
c1d51931 4008 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4009 } else
4010 data->arg.new_lock_owner = 0;
26e976a8 4011 data->timestamp = jiffies;
035168ab
TM		 4012 if (nfs4_setup_sequence(data->server,
4013 &data->arg.seq_args,
66179efe
AA		 4014 &data->res.seq_res, 1, task))
4015 return;
5138fde0 4016 rpc_call_start(task);
3110ff80 4017 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4018}
4019
b257957e
AB		 4020static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4021{
4022 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4023 nfs4_lock_prepare(task, calldata);
4024}
4025
a5d16a4d
TM		 4026static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4027{
4028 struct nfs4_lockdata *data = calldata;
4029
3110ff80 4030 dprintk("%s: begin!\n", __func__);
a5d16a4d 4031
14516c3a
TM		 4032 if (!nfs4_sequence_done(task, &data->res.seq_res))
4033 return;
66179efe 4034
a5d16a4d 4035 data->rpc_status = task->tk_status;
a5d16a4d 4036 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4037 if (data->rpc_status == 0)
4038 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4039 else
4040 goto out;
4041 }
4042 if (data->rpc_status == 0) {
4043 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4044 sizeof(data->lsp->ls_stateid.data));
4045 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4046 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4047 }
a5d16a4d 4048out:
3110ff80 4049 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4050}
4051
4052static void nfs4_lock_release(void *calldata)
4053{
4054 struct nfs4_lockdata *data = calldata;
4055
3110ff80 4056 dprintk("%s: begin!\n", __func__);
2f74c0a0 4057 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4058 if (data->cancelled != 0) {
4059 struct rpc_task *task;
4060 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4061 data->arg.lock_seqid);
4062 if (!IS_ERR(task))
e6b3c4db 4063 rpc_put_task(task);
3110ff80 4064 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4065 } else
4066 nfs_free_seqid(data->arg.lock_seqid);
4067 nfs4_put_lock_state(data->lsp);
4068 put_nfs_open_context(data->ctx);
4069 kfree(data);
3110ff80 4070 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4071}
4072
4073static const struct rpc_call_ops nfs4_lock_ops = {
4074 .rpc_call_prepare = nfs4_lock_prepare,
4075 .rpc_call_done = nfs4_lock_done,
4076 .rpc_release = nfs4_lock_release,
4077};
4078
b257957e
AB		 4079static const struct rpc_call_ops nfs4_recover_lock_ops = {
4080 .rpc_call_prepare = nfs4_recover_lock_prepare,
4081 .rpc_call_done = nfs4_lock_done,
4082 .rpc_release = nfs4_lock_release,
4083};
4084
2bee72a6
TM		 4085static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4086{
4087 struct nfs_client *clp = server->nfs_client;
4088 struct nfs4_state *state = lsp->ls_state;
4089
4090 switch (error) {
4091 case -NFS4ERR_ADMIN_REVOKED:
4092 case -NFS4ERR_BAD_STATEID:
4093 case -NFS4ERR_EXPIRED:
4094 if (new_lock_owner != 0 ||
4095 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4096 nfs4_state_mark_reclaim_nograce(clp, state);
4097 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4098 break;
4099 case -NFS4ERR_STALE_STATEID:
4100 if (new_lock_owner != 0 ||
4101 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4102 nfs4_state_mark_reclaim_reboot(clp, state);
4103 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4104 };
4105}
4106
afe6c27c 4107static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4108{
4109 struct nfs4_lockdata *data;
4110 struct rpc_task *task;
5138fde0
TM		 4111 struct rpc_message msg = {
4112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4113 .rpc_cred = state->owner->so_cred,
4114 };
c970aa85
TM		 4115 struct rpc_task_setup task_setup_data = {
4116 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4117 .rpc_message = &msg,
c970aa85 4118 .callback_ops = &nfs4_lock_ops,
101070ca 4119 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4120 .flags = RPC_TASK_ASYNC,
4121 };
a5d16a4d
TM		 4122 int ret;
4123
3110ff80 4124 dprintk("%s: begin!\n", __func__);
cd3758e3 4125 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4126 fl->fl_u.nfs4_fl.owner,
4127 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4128 if (data == NULL)
4129 return -ENOMEM;
4130 if (IS_SETLKW(cmd))
4131 data->arg.block = 1;
b257957e
AB		 4132 if (recovery_type > NFS_LOCK_NEW) {
4133 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4134 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4135 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4136 }
5138fde0
TM		 4137 msg.rpc_argp = &data->arg,
4138 msg.rpc_resp = &data->res,
c970aa85
TM		 4139 task_setup_data.callback_data = data;
4140 task = rpc_run_task(&task_setup_data);
7a1218a2 4141 if (IS_ERR(task))
a5d16a4d 4142 return PTR_ERR(task);
a5d16a4d
TM		 4143 ret = nfs4_wait_for_completion_rpc_task(task);
4144 if (ret == 0) {
4145 ret = data->rpc_status;
2bee72a6
TM		 4146 if (ret)
4147 nfs4_handle_setlk_error(data->server, data->lsp,
4148 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4149 } else
4150 data->cancelled = 1;
e6b3c4db 4151 rpc_put_task(task);
3110ff80 4152 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4153 return ret;
1da177e4
LT		 4154}
4155
4156static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4157{
202b50dc
TM		 4158 struct nfs_server *server = NFS_SERVER(state->inode);
4159 struct nfs4_exception exception = { };
4160 int err;
4161
4162 do {
42a2d13e
TM		 4163 /* Cache the lock if possible... */
4164 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4165 return 0;
afe6c27c 4166 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4167 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4168 break;
4169 nfs4_handle_exception(server, err, &exception);
4170 } while (exception.retry);
4171 return err;
1da177e4
LT		 4172}
4173
4174static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4175{
202b50dc
TM		 4176 struct nfs_server *server = NFS_SERVER(state->inode);
4177 struct nfs4_exception exception = { };
4178 int err;
4179
6bfc93ef
TM		 4180 err = nfs4_set_lock_state(state, request);
4181 if (err != 0)
4182 return err;
202b50dc 4183 do {
42a2d13e
TM		 4184 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4185 return 0;
afe6c27c 4186 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4187 switch (err) {
4188 default:
4189 goto out;
4190 case -NFS4ERR_GRACE:
4191 case -NFS4ERR_DELAY:
2c643488 4192 case -EKEYEXPIRED:
a9ed2e25
TM		 4193 nfs4_handle_exception(server, err, &exception);
4194 err = 0;
4195 }
202b50dc 4196 } while (exception.retry);
a9ed2e25 4197out:
202b50dc 4198 return err;
1da177e4
LT		 4199}
4200
4201static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4202{
19e03c57 4203 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4204 unsigned char fl_flags = request->fl_flags;
8e469ebd 4205 int status = -ENOLCK;
1da177e4 4206
8e469ebd
TM		 4207 if ((fl_flags & FL_POSIX) &&
4208 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4209 goto out;
6bfc93ef 4210 /* Is this a delegated open? */
6bfc93ef
TM		 4211 status = nfs4_set_lock_state(state, request);
4212 if (status != 0)
4213 goto out;
01c3b861
TM		 4214 request->fl_flags |= FL_ACCESS;
4215 status = do_vfs_lock(request->fl_file, request);
4216 if (status < 0)
4217 goto out;
19e03c57 4218 down_read(&nfsi->rwsem);
01c3b861 4219 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4220 /* Yes: cache locks! */
01c3b861 4221 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4222 request->fl_flags = fl_flags & ~FL_SLEEP;
4223 status = do_vfs_lock(request->fl_file, request);
4224 goto out_unlock;
01c3b861 4225 }
afe6c27c 4226 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4227 if (status != 0)
01c3b861 4228 goto out_unlock;
6bfc93ef 4229 /* Note: we always want to sleep here! */
01c3b861 4230 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4231 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4232 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4233out_unlock:
19e03c57 4234 up_read(&nfsi->rwsem);
01c3b861
TM		 4235out:
4236 request->fl_flags = fl_flags;
1da177e4
LT		 4237 return status;
4238}
4239
4240static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4241{
4242 struct nfs4_exception exception = { };
4243 int err;
4244
4245 do {
965b5d67
TM		 4246 err = _nfs4_proc_setlk(state, cmd, request);
4247 if (err == -NFS4ERR_DENIED)
4248 err = -EAGAIN;
1da177e4 4249 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4250 err, &exception);
1da177e4
LT		 4251 } while (exception.retry);
4252 return err;
4253}
4254
4255static int
4256nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4257{
4258 struct nfs_open_context *ctx;
4259 struct nfs4_state *state;
4260 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4261 int status;
4262
4263 /* verify open state */
cd3758e3 4264 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4265 state = ctx->state;
4266
4267 if (request->fl_start < 0 || request->fl_end < 0)
4268 return -EINVAL;
4269
d953126a
TM		 4270 if (IS_GETLK(cmd)) {
4271 if (state != NULL)
4272 return nfs4_proc_getlk(state, F_GETLK, request);
4273 return 0;
4274 }
1da177e4
LT		 4275
4276 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4277 return -EINVAL;
4278
d953126a
TM		 4279 if (request->fl_type == F_UNLCK) {
4280 if (state != NULL)
4281 return nfs4_proc_unlck(state, cmd, request);
4282 return 0;
4283 }
1da177e4 4284
d953126a
TM		 4285 if (state == NULL)
4286 return -ENOLCK;
1da177e4
LT		 4287 do {
4288 status = nfs4_proc_setlk(state, cmd, request);
4289 if ((status != -EAGAIN) || IS_SETLK(cmd))
4290 break;
4291 timeout = nfs4_set_lock_task_retry(timeout);
4292 status = -ERESTARTSYS;
4293 if (signalled())
4294 break;
4295 } while(status < 0);
1da177e4
LT		 4296 return status;
4297}
4298
888e694c
TM		 4299int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4300{
4301 struct nfs_server *server = NFS_SERVER(state->inode);
4302 struct nfs4_exception exception = { };
4303 int err;
4304
4305 err = nfs4_set_lock_state(state, fl);
4306 if (err != 0)
4307 goto out;
4308 do {
afe6c27c 4309 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4310 switch (err) {
4311 default:
4312 printk(KERN_ERR "%s: unhandled error %d.\n",
4313 __func__, err);
4314 case 0:
965b5d67 4315 case -ESTALE:
d5122201
TM		 4316 goto out;
4317 case -NFS4ERR_EXPIRED:
4318 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4319 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4320 case -NFS4ERR_BADSESSION:
4321 case -NFS4ERR_BADSLOT:
4322 case -NFS4ERR_BAD_HIGH_SLOT:
4323 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4324 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4325 nfs4_schedule_state_recovery(server->nfs_client);
4326 goto out;
965b5d67
TM		 4327 case -ERESTARTSYS:
4328 /*
4329 * The show must go on: exit, but mark the
4330 * stateid as needing recovery.
4331 */
4332 case -NFS4ERR_ADMIN_REVOKED:
4333 case -NFS4ERR_BAD_STATEID:
4334 case -NFS4ERR_OPENMODE:
4335 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4336 err = 0;
4337 goto out;
4338 case -ENOMEM:
4339 case -NFS4ERR_DENIED:
4340 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4341 err = 0;
4342 goto out;
d5122201 4343 case -NFS4ERR_DELAY:
2c643488 4344 case -EKEYEXPIRED:
d5122201
TM		 4345 break;
4346 }
888e694c
TM		 4347 err = nfs4_handle_exception(server, err, &exception);
4348 } while (exception.retry);
4349out:
4350 return err;
4351}
6b3b5496 4352
d3c7b7cc
TM		 4353static void nfs4_release_lockowner_release(void *calldata)
4354{
4355 kfree(calldata);
4356}
4357
4358const struct rpc_call_ops nfs4_release_lockowner_ops = {
4359 .rpc_release = nfs4_release_lockowner_release,
4360};
4361
4362void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4363{
4364 struct nfs_server *server = lsp->ls_state->owner->so_server;
4365 struct nfs_release_lockowner_args *args;
4366 struct rpc_message msg = {
4367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4368 };
4369
4370 if (server->nfs_client->cl_mvops->minor_version != 0)
4371 return;
4372 args = kmalloc(sizeof(*args), GFP_NOFS);
4373 if (!args)
4374 return;
4375 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4376 args->lock_owner.id = lsp->ls_id.id;
4377 msg.rpc_argp = args;
4378 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4379}
4380
aa1870af
BF		 4381#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4382
6b3b5496
BF		 4383int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4384 size_t buflen, int flags)
4385{
4b580ee3
BF		 4386 struct inode *inode = dentry->d_inode;
4387
4388 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4389 return -EOPNOTSUPP;
4390
4b580ee3 4391 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4392}
4393
4394/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4395 * and that's what we'll do for e.g. user attributes that haven't been set.
4396 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4397 * attributes in kernel-managed attribute namespaces. */
4398ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4399 size_t buflen)
4400{
aa1870af
BF		 4401 struct inode *inode = dentry->d_inode;
4402
4403 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4404 return -EOPNOTSUPP;
4405
4406 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4407}
4408
4409ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4410{
aa1870af 4411 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4412
096455a2
BF		 4413 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4414 return 0;
6b3b5496
BF		 4415 if (buf && buflen < len)
4416 return -ERANGE;
4417 if (buf)
aa1870af
BF		 4418 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4419 return len;
6b3b5496
BF		 4420}
4421
69aaaae1
TM		 4422static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4423{
4424 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4425 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4426 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4427 return;
4428
4429 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4430 NFS_ATTR_FATTR_NLINK;
4431 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4432 fattr->nlink = 2;
4433}
4434
56659e99 4435int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4436 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4437{
4438 struct nfs_server *server = NFS_SERVER(dir);
4439 u32 bitmask[2] = {
361e624f
MN		 4440 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4441 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4442 };
4443 struct nfs4_fs_locations_arg args = {
4444 .dir_fh = NFS_FH(dir),
c228fd3a 4445 .name = name,
683b57b4
TM		 4446 .page = page,
4447 .bitmask = bitmask,
4448 };
22958463
BH		 4449 struct nfs4_fs_locations_res res = {
4450 .fs_locations = fs_locations,
4451 };
683b57b4
TM		 4452 struct rpc_message msg = {
4453 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4454 .rpc_argp = &args,
22958463 4455 .rpc_resp = &res,
683b57b4
TM		 4456 };
4457 int status;
4458
3110ff80 4459 dprintk("%s: start\n", __func__);
c228fd3a 4460 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4461 fs_locations->server = server;
830b8e33 4462 fs_locations->nlocations = 0;
cccef3b9 4463 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4464 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4465 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4466 return status;
4467}
4468
557134a3 4469#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4470/*
4471 * nfs4_proc_exchange_id()
4472 *
4473 * Since the clientid has expired, all compounds using sessions
4474 * associated with the stale clientid will be returning
4475 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4476 * be in some phase of session reset.
4477 */
4d643d1d 4478int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4479{
4480 nfs4_verifier verifier;
4481 struct nfs41_exchange_id_args args = {
4482 .client = clp,
4483 .flags = clp->cl_exchange_flags,
4484 };
4485 struct nfs41_exchange_id_res res = {
4486 .client = clp,
4487 };
4488 int status;
4489 struct rpc_message msg = {
4490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4491 .rpc_argp = &args,
4492 .rpc_resp = &res,
4493 .rpc_cred = cred,
4494 };
4495 __be32 *p;
4496
4497 dprintk("--> %s\n", __func__);
4498 BUG_ON(clp == NULL);
a7b72103 4499
7b183d0d
AB		 4500 /* Remove server-only flags */
4501 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4502
99fe60d0
BH		 4503 p = (u32 *)verifier.data;
4504 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4505 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4506 args.verifier = &verifier;
4507
4508 while (1) {
4509 args.id_len = scnprintf(args.id, sizeof(args.id),
4510 "%s/%s %u",
4511 clp->cl_ipaddr,
4512 rpc_peeraddr2str(clp->cl_rpcclient,
4513 RPC_DISPLAY_ADDR),
4514 clp->cl_id_uniquifier);
4515
4516 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4517
180b62a3 4518 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4519 break;
4520
4521 if (signalled())
4522 break;
4523
4524 if (++clp->cl_id_uniquifier == 0)
4525 break;
4526 }
4527
4528 dprintk("<-- %s status= %d\n", __func__, status);
4529 return status;
4530}
4531
2050f0cc
AA		 4532struct nfs4_get_lease_time_data {
4533 struct nfs4_get_lease_time_args *args;
4534 struct nfs4_get_lease_time_res *res;
4535 struct nfs_client *clp;
4536};
4537
4538static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4539 void *calldata)
4540{
4541 int ret;
4542 struct nfs4_get_lease_time_data *data =
4543 (struct nfs4_get_lease_time_data *)calldata;
4544
4545 dprintk("--> %s\n", __func__);
689cf5c1 4546 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4547 /* just setup sequence, do not trigger session recovery
4548 since we're invoked within one */
4549 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4550 &data->args->la_seq_args,
4551 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4552
4553 BUG_ON(ret == -EAGAIN);
4554 rpc_call_start(task);
4555 dprintk("<-- %s\n", __func__);
4556}
4557
4558/*
4559 * Called from nfs4_state_manager thread for session setup, so don't recover
4560 * from sequence operation or clientid errors.
4561 */
4562static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4563{
4564 struct nfs4_get_lease_time_data *data =
4565 (struct nfs4_get_lease_time_data *)calldata;
4566
4567 dprintk("--> %s\n", __func__);
14516c3a
TM		 4568 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4569 return;
2050f0cc
AA		 4570 switch (task->tk_status) {
4571 case -NFS4ERR_DELAY:
4572 case -NFS4ERR_GRACE:
2c643488 4573 case -EKEYEXPIRED:
2050f0cc
AA		 4574 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4575 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4576 task->tk_status = 0;
0110ee15 4577 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4578 return;
4579 }
2050f0cc
AA		 4580 dprintk("<-- %s\n", __func__);
4581}
4582
4583struct rpc_call_ops nfs4_get_lease_time_ops = {
4584 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4585 .rpc_call_done = nfs4_get_lease_time_done,
4586};
4587
4588int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4589{
4590 struct rpc_task *task;
4591 struct nfs4_get_lease_time_args args;
4592 struct nfs4_get_lease_time_res res = {
4593 .lr_fsinfo = fsinfo,
4594 };
4595 struct nfs4_get_lease_time_data data = {
4596 .args = &args,
4597 .res = &res,
4598 .clp = clp,
4599 };
4600 struct rpc_message msg = {
4601 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4602 .rpc_argp = &args,
4603 .rpc_resp = &res,
4604 };
4605 struct rpc_task_setup task_setup = {
4606 .rpc_client = clp->cl_rpcclient,
4607 .rpc_message = &msg,
4608 .callback_ops = &nfs4_get_lease_time_ops,
4609 .callback_data = &data
4610 };
4611 int status;
4612
4613 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4614 dprintk("--> %s\n", __func__);
4615 task = rpc_run_task(&task_setup);
4616
4617 if (IS_ERR(task))
4618 status = PTR_ERR(task);
4619 else {
4620 status = task->tk_status;
4621 rpc_put_task(task);
4622 }
4623 dprintk("<-- %s return %d\n", __func__, status);
4624
4625 return status;
4626}
4627
b73dafa7
RL		 4628/*
4629 * Reset a slot table
4630 */
104aeba4
AA		 4631static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4632 int ivalue)
ac72b7b3 4633{
104aeba4 4634 struct nfs4_slot *new = NULL;
b73dafa7 4635 int i;
ac72b7b3
AA		 4636 int ret = 0;
4637
104aeba4
AA		 4638 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4639 max_reqs, tbl->max_slots);
ac72b7b3 4640
104aeba4
AA		 4641 /* Does the newly negotiated max_reqs match the existing slot table? */
4642 if (max_reqs != tbl->max_slots) {
4643 ret = -ENOMEM;
4644 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4645 GFP_NOFS);
104aeba4
AA		 4646 if (!new)
4647 goto out;
4648 ret = 0;
4649 kfree(tbl->slots);
ac72b7b3
AA		 4650 }
4651 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4652 if (new) {
4653 tbl->slots = new;
4654 tbl->max_slots = max_reqs;
4655 }
4656 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4657 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4658 spin_unlock(&tbl->slot_tbl_lock);
4659 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4660 tbl, tbl->slots, tbl->max_slots);
4661out:
4662 dprintk("<-- %s: return %d\n", __func__, ret);
4663 return ret;
4664}
4665
b73dafa7
RL		 4666/*
4667 * Reset the forechannel and backchannel slot tables
4668 */
4669static int nfs4_reset_slot_tables(struct nfs4_session *session)
4670{
4671 int status;
4672
4673 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4674 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4675 if (status)
4676 return status;
4677
4678 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4679 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4680 return status;
4681}
4682
f8625a6a
RL		 4683/* Destroy the slot table */
4684static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4685{
4686 if (session->fc_slot_table.slots != NULL) {
4687 kfree(session->fc_slot_table.slots);
4688 session->fc_slot_table.slots = NULL;
4689 }
4690 if (session->bc_slot_table.slots != NULL) {
4691 kfree(session->bc_slot_table.slots);
4692 session->bc_slot_table.slots = NULL;
4693 }
4694 return;
4695}
4696
fc931582
AA		 4697/*
4698 * Initialize slot table
4699 */
050047ce
RL		 4700static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4701 int max_slots, int ivalue)
fc931582 4702{
fc931582
AA		 4703 struct nfs4_slot *slot;
4704 int ret = -ENOMEM;
4705
4706 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4707
050047ce 4708 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4709
8535b2be 4710 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4711 if (!slot)
4712 goto out;
fc931582
AA		 4713 ret = 0;
4714
4715 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4716 tbl->max_slots = max_slots;
4717 tbl->slots = slot;
4718 tbl->highest_used_slotid = -1; /* no slot is currently used */
4719 spin_unlock(&tbl->slot_tbl_lock);
4720 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4721 tbl, tbl->slots, tbl->max_slots);
4722out:
4723 dprintk("<-- %s: return %d\n", __func__, ret);
4724 return ret;
fc931582
AA		 4725}
4726
050047ce
RL		 4727/*
4728 * Initialize the forechannel and backchannel tables
4729 */
4730static int nfs4_init_slot_tables(struct nfs4_session *session)
4731{
f26468fb
TM		 4732 struct nfs4_slot_table *tbl;
4733 int status = 0;
050047ce 4734
f26468fb
TM		 4735 tbl = &session->fc_slot_table;
4736 if (tbl->slots == NULL) {
4737 status = nfs4_init_slot_table(tbl,
4738 session->fc_attrs.max_reqs, 1);
4739 if (status)
4740 return status;
4741 }
050047ce 4742
f26468fb
TM		 4743 tbl = &session->bc_slot_table;
4744 if (tbl->slots == NULL) {
4745 status = nfs4_init_slot_table(tbl,
4746 session->bc_attrs.max_reqs, 0);
4747 if (status)
4748 nfs4_destroy_slot_tables(session);
4749 }
f8625a6a
RL		 4750
4751 return status;
557134a3
AA		 4752}
4753
4754struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4755{
4756 struct nfs4_session *session;
4757 struct nfs4_slot_table *tbl;
4758
8535b2be 4759 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4760 if (!session)
4761 return NULL;
76db6d95 4762
ea028ac9 4763 init_completion(&session->complete);
76db6d95 4764
557134a3 4765 tbl = &session->fc_slot_table;
9dfdf404 4766 tbl->highest_used_slotid = -1;
557134a3 4767 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4768 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4769
4770 tbl = &session->bc_slot_table;
9dfdf404 4771 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4772 spin_lock_init(&tbl->slot_tbl_lock);
4773 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4774
1055d76d
TM		 4775 session->session_state = 1<<NFS4_SESSION_INITING;
4776
557134a3
AA		 4777 session->clp = clp;
4778 return session;
4779}
4780
4781void nfs4_destroy_session(struct nfs4_session *session)
4782{
5a0ffe54
AA		 4783 nfs4_proc_destroy_session(session);
4784 dprintk("%s Destroy backchannel for xprt %p\n",
4785 __func__, session->clp->cl_rpcclient->cl_xprt);
4786 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4787 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4788 nfs4_destroy_slot_tables(session);
557134a3
AA		 4789 kfree(session);
4790}
4791
fc931582
AA		 4792/*
4793 * Initialize the values to be used by the client in CREATE_SESSION
4794 * If nfs4_init_session set the fore channel request and response sizes,
4795 * use them.
4796 *
4797 * Set the back channel max_resp_sz_cached to zero to force the client to
4798 * always set csa_cachethis to FALSE because the current implementation
4799 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4800 */
4801static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4802{
4803 struct nfs4_session *session = args->client->cl_session;
4804 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4805 mxresp_sz = session->fc_attrs.max_resp_sz;
4806
4807 if (mxrqst_sz == 0)
4808 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4809 if (mxresp_sz == 0)
4810 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4811 /* Fore channel attributes */
4812 args->fc_attrs.headerpadsz = 0;
4813 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4814 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4815 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4816 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4817
4818 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4819 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4820 __func__,
4821 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4822 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4823
4824 /* Back channel attributes */
4825 args->bc_attrs.headerpadsz = 0;
4826 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4827 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4828 args->bc_attrs.max_resp_sz_cached = 0;
4829 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4830 args->bc_attrs.max_reqs = 1;
4831
4832 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4833 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4834 __func__,
4835 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4836 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4837 args->bc_attrs.max_reqs);
4838}
4839
8d35301d
AA		 4840static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4841{
4842 if (rcvd <= sent)
4843 return 0;
4844 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4845 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4846 return -EINVAL;
4847}
4848
4849#define _verify_fore_channel_attr(_name_) \
4850 _verify_channel_attr("fore", #_name_, \
4851 args->fc_attrs._name_, \
4852 session->fc_attrs._name_)
4853
4854#define _verify_back_channel_attr(_name_) \
4855 _verify_channel_attr("back", #_name_, \
4856 args->bc_attrs._name_, \
4857 session->bc_attrs._name_)
4858
4859/*
4860 * The server is not allowed to increase the fore channel header pad size,
4861 * maximum response size, or maximum number of operations.
4862 *
4863 * The back channel attributes are only negotiatied down: We send what the
4864 * (back channel) server insists upon.
4865 */
4866static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4867 struct nfs4_session *session)
4868{
4869 int ret = 0;
4870
4871 ret |= _verify_fore_channel_attr(headerpadsz);
4872 ret |= _verify_fore_channel_attr(max_resp_sz);
4873 ret |= _verify_fore_channel_attr(max_ops);
4874
4875 ret |= _verify_back_channel_attr(headerpadsz);
4876 ret |= _verify_back_channel_attr(max_rqst_sz);
4877 ret |= _verify_back_channel_attr(max_resp_sz);
4878 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4879 ret |= _verify_back_channel_attr(max_ops);
4880 ret |= _verify_back_channel_attr(max_reqs);
4881
4882 return ret;
4883}
4884
fc931582
AA		 4885static int _nfs4_proc_create_session(struct nfs_client *clp)
4886{
4887 struct nfs4_session *session = clp->cl_session;
4888 struct nfs41_create_session_args args = {
4889 .client = clp,
4890 .cb_program = NFS4_CALLBACK,
4891 };
4892 struct nfs41_create_session_res res = {
4893 .client = clp,
4894 };
4895 struct rpc_message msg = {
4896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4897 .rpc_argp = &args,
4898 .rpc_resp = &res,
4899 };
4900 int status;
4901
4902 nfs4_init_channel_attrs(&args);
0f91421e 4903 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4904
4905 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4906
8d35301d
AA		 4907 if (!status)
4908 /* Verify the session's negotiated channel_attrs values */
4909 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4910 if (!status) {
4911 /* Increment the clientid slot sequence id */
4912 clp->cl_seqid++;
4913 }
4914
4915 return status;
4916}
4917
4918/*
4919 * Issues a CREATE_SESSION operation to the server.
4920 * It is the responsibility of the caller to verify the session is
4921 * expired before calling this routine.
4922 */
f26468fb 4923int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4924{
4925 int status;
4926 unsigned *ptr;
fc931582
AA		 4927 struct nfs4_session *session = clp->cl_session;
4928
4929 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4930
4931 status = _nfs4_proc_create_session(clp);
4932 if (status)
4933 goto out;
4934
f26468fb
TM		 4935 /* Init and reset the fore channel */
4936 status = nfs4_init_slot_tables(session);
4937 dprintk("slot table initialization returned %d\n", status);
4938 if (status)
4939 goto out;
4940 status = nfs4_reset_slot_tables(session);
4941 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4942 if (status)
4943 goto out;
4944
4945 ptr = (unsigned *)&session->sess_id.data[0];
4946 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4947 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4948out:
4949 dprintk("<-- %s\n", __func__);
4950 return status;
4951}
4952
0f3e66c6
AA		 4953/*
4954 * Issue the over-the-wire RPC DESTROY_SESSION.
4955 * The caller must serialize access to this routine.
4956 */
4957int nfs4_proc_destroy_session(struct nfs4_session *session)
4958{
4959 int status = 0;
4960 struct rpc_message msg;
4961
4962 dprintk("--> nfs4_proc_destroy_session\n");
4963
4964 /* session is still being setup */
4965 if (session->clp->cl_cons_state != NFS_CS_READY)
4966 return status;
4967
4968 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4969 msg.rpc_argp = session;
4970 msg.rpc_resp = NULL;
4971 msg.rpc_cred = NULL;
4972 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4973
4974 if (status)
4975 printk(KERN_WARNING
4976 "Got error %d from the server on DESTROY_SESSION. "
4977 "Session has been destroyed regardless...\n", status);
4978
4979 dprintk("<-- nfs4_proc_destroy_session\n");
4980 return status;
4981}
4982
fccba804
TM		 4983int nfs4_init_session(struct nfs_server *server)
4984{
4985 struct nfs_client *clp = server->nfs_client;
2449ea2e 4986 struct nfs4_session *session;
68bf05ef 4987 unsigned int rsize, wsize;
fccba804
TM		 4988 int ret;
4989
4990 if (!nfs4_has_session(clp))
4991 return 0;
4992
1055d76d
TM		 4993 session = clp->cl_session;
4994 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
4995 return 0;
4996
68bf05ef
AA		 4997 rsize = server->rsize;
4998 if (rsize == 0)
4999 rsize = NFS_MAX_FILE_IO_SIZE;
5000 wsize = server->wsize;
5001 if (wsize == 0)
5002 wsize = NFS_MAX_FILE_IO_SIZE;
5003
68bf05ef
AA		 5004 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5005 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5006
fccba804
TM		 5007 ret = nfs4_recover_expired_lease(server);
5008 if (!ret)
5009 ret = nfs4_check_client_ready(clp);
5010 return ret;
5011}
5012
fc01cea9
AA		 5013/*
5014 * Renew the cl_session lease.
5015 */
d5f8d3fe
TM		 5016struct nfs4_sequence_data {
5017 struct nfs_client *clp;
5018 struct nfs4_sequence_args args;
5019 struct nfs4_sequence_res res;
5020};
5021
dc96aef9
AB		 5022static void nfs41_sequence_release(void *data)
5023{
d5f8d3fe
TM		 5024 struct nfs4_sequence_data *calldata = data;
5025 struct nfs_client *clp = calldata->clp;
dc96aef9 5026
7135840f
AB		 5027 if (atomic_read(&clp->cl_count) > 1)
5028 nfs4_schedule_state_renewal(clp);
5029 nfs_put_client(clp);
d5f8d3fe 5030 kfree(calldata);
dc96aef9
AB		 5031}
5032
aa5190d0
TM		 5033static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5034{
5035 switch(task->tk_status) {
5036 case -NFS4ERR_DELAY:
5037 case -EKEYEXPIRED:
5038 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5039 return -EAGAIN;
5040 default:
5041 nfs4_schedule_state_recovery(clp);
5042 }
5043 return 0;
5044}
5045
dc96aef9 5046static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5047{
d5f8d3fe
TM		 5048 struct nfs4_sequence_data *calldata = data;
5049 struct nfs_client *clp = calldata->clp;
fc01cea9 5050
14516c3a
TM		 5051 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5052 return;
fc01cea9
AA		 5053
5054 if (task->tk_status < 0) {
5055 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5056 if (atomic_read(&clp->cl_count) == 1)
5057 goto out;
fc01cea9 5058
aa5190d0
TM		 5059 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5060 rpc_restart_call_prepare(task);
fc01cea9
AA		 5061 return;
5062 }
5063 }
fc01cea9 5064 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5065out:
fc01cea9
AA		 5066 dprintk("<-- %s\n", __func__);
5067}
5068
5069static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5070{
d5f8d3fe
TM		 5071 struct nfs4_sequence_data *calldata = data;
5072 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5073 struct nfs4_sequence_args *args;
5074 struct nfs4_sequence_res *res;
5075
fc01cea9
AA		 5076 args = task->tk_msg.rpc_argp;
5077 res = task->tk_msg.rpc_resp;
5078
035168ab 5079 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5080 return;
5081 rpc_call_start(task);
5082}
5083
5084static const struct rpc_call_ops nfs41_sequence_ops = {
5085 .rpc_call_done = nfs41_sequence_call_done,
5086 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5087 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5088};
5089
71ac6da9 5090static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5091{
d5f8d3fe 5092 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5093 struct rpc_message msg = {
5094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5095 .rpc_cred = cred,
5096 };
71ac6da9
TM		 5097 struct rpc_task_setup task_setup_data = {
5098 .rpc_client = clp->cl_rpcclient,
5099 .rpc_message = &msg,
5100 .callback_ops = &nfs41_sequence_ops,
5101 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5102 };
fc01cea9 5103
7135840f 5104 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5105 return ERR_PTR(-EIO);
d5f8d3fe
TM		 5106 calldata = kmalloc(sizeof(*calldata), GFP_NOFS);
5107 if (calldata == NULL) {
7135840f 5108 nfs_put_client(clp);
71ac6da9 5109 return ERR_PTR(-ENOMEM);
fc01cea9 5110 }
d5f8d3fe
TM		 5111 calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5112 msg.rpc_argp = &calldata->args;
5113 msg.rpc_resp = &calldata->res;
5114 calldata->clp = clp;
71ac6da9 5115 task_setup_data.callback_data = calldata;
fc01cea9 5116
71ac6da9
TM		 5117 return rpc_run_task(&task_setup_data);
5118}
5119
5120static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5121{
5122 struct rpc_task *task;
5123 int ret = 0;
5124
5125 task = _nfs41_proc_sequence(clp, cred);
5126 if (IS_ERR(task))
5127 ret = PTR_ERR(task);
5128 else
5129 rpc_put_task(task);
5130 dprintk("<-- %s status=%d\n", __func__, ret);
5131 return ret;
5132}
5133
5134static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5135{
5136 struct rpc_task *task;
5137 int ret;
5138
5139 task = _nfs41_proc_sequence(clp, cred);
5140 if (IS_ERR(task)) {
5141 ret = PTR_ERR(task);
5142 goto out;
5143 }
5144 ret = rpc_wait_for_completion_task(task);
5145 if (!ret)
5146 ret = task->tk_status;
5147 rpc_put_task(task);
5148out:
5149 dprintk("<-- %s status=%d\n", __func__, ret);
5150 return ret;
fc01cea9
AA		 5151}
5152
fce5c838
RL		 5153struct nfs4_reclaim_complete_data {
5154 struct nfs_client *clp;
5155 struct nfs41_reclaim_complete_args arg;
5156 struct nfs41_reclaim_complete_res res;
5157};
5158
5159static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5160{
5161 struct nfs4_reclaim_complete_data *calldata = data;
5162
b257957e 5163 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5164 if (nfs41_setup_sequence(calldata->clp->cl_session,
5165 &calldata->arg.seq_args,
fce5c838
RL		 5166 &calldata->res.seq_res, 0, task))
5167 return;
5168
5169 rpc_call_start(task);
5170}
5171
aa5190d0
TM		 5172static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5173{
5174 switch(task->tk_status) {
5175 case 0:
5176 case -NFS4ERR_COMPLETE_ALREADY:
5177 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5178 break;
5179 case -NFS4ERR_DELAY:
5180 case -EKEYEXPIRED:
5181 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5182 return -EAGAIN;
5183 default:
5184 nfs4_schedule_state_recovery(clp);
5185 }
5186 return 0;
5187}
5188
fce5c838
RL		 5189static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5190{
5191 struct nfs4_reclaim_complete_data *calldata = data;
5192 struct nfs_client *clp = calldata->clp;
5193 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5194
5195 dprintk("--> %s\n", __func__);
14516c3a
TM		 5196 if (!nfs41_sequence_done(task, res))
5197 return;
fce5c838 5198
aa5190d0
TM		 5199 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5200 rpc_restart_call_prepare(task);
5201 return;
5202 }
fce5c838
RL		 5203 dprintk("<-- %s\n", __func__);
5204}
5205
5206static void nfs4_free_reclaim_complete_data(void *data)
5207{
5208 struct nfs4_reclaim_complete_data *calldata = data;
5209
5210 kfree(calldata);
5211}
5212
5213static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5214 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5215 .rpc_call_done = nfs4_reclaim_complete_done,
5216 .rpc_release = nfs4_free_reclaim_complete_data,
5217};
5218
5219/*
5220 * Issue a global reclaim complete.
5221 */
5222static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5223{
5224 struct nfs4_reclaim_complete_data *calldata;
5225 struct rpc_task *task;
5226 struct rpc_message msg = {
5227 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5228 };
5229 struct rpc_task_setup task_setup_data = {
5230 .rpc_client = clp->cl_rpcclient,
5231 .rpc_message = &msg,
5232 .callback_ops = &nfs4_reclaim_complete_call_ops,
5233 .flags = RPC_TASK_ASYNC,
5234 };
5235 int status = -ENOMEM;
5236
5237 dprintk("--> %s\n", __func__);
8535b2be 5238 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5239 if (calldata == NULL)
5240 goto out;
5241 calldata->clp = clp;
5242 calldata->arg.one_fs = 0;
5243 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5244
5245 msg.rpc_argp = &calldata->arg;
5246 msg.rpc_resp = &calldata->res;
5247 task_setup_data.callback_data = calldata;
5248 task = rpc_run_task(&task_setup_data);
acf82b85 5249 if (IS_ERR(task)) {
fce5c838 5250 status = PTR_ERR(task);
acf82b85
DC		 5251 goto out;
5252 }
fce5c838 5253 rpc_put_task(task);
acf82b85 5254 return 0;
fce5c838
RL		 5255out:
5256 dprintk("<-- %s status=%d\n", __func__, status);
5257 return status;
5258}
557134a3
AA		 5259#endif /* CONFIG_NFS_V4_1 */
5260
591d71cb 5261struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5262 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5263 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5264 .recover_open = nfs4_open_reclaim,
5265 .recover_lock = nfs4_lock_reclaim,
591d71cb 5266 .establish_clid = nfs4_init_clientid,
90a16617 5267 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5268};
5269
591d71cb
AA		 5270#if defined(CONFIG_NFS_V4_1)
5271struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5272 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5273 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5274 .recover_open = nfs4_open_reclaim,
5275 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5276 .establish_clid = nfs41_init_clientid,
b4b82607 5277 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5278 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5279};
5280#endif /* CONFIG_NFS_V4_1 */
5281
5282struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5283 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5284 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5285 .recover_open = nfs4_open_expired,
5286 .recover_lock = nfs4_lock_expired,
5287 .establish_clid = nfs4_init_clientid,
90a16617 5288 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5289};
5290
5291#if defined(CONFIG_NFS_V4_1)
5292struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5293 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5294 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5295 .recover_open = nfs4_open_expired,
5296 .recover_lock = nfs4_lock_expired,
4d643d1d 5297 .establish_clid = nfs41_init_clientid,
b4b82607 5298 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5299};
591d71cb 5300#endif /* CONFIG_NFS_V4_1 */
1da177e4 5301
29fba38b
BH		 5302struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5303 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5304 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5305 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5306};
5307
5308#if defined(CONFIG_NFS_V4_1)
5309struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5310 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5311 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5312 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5313};
5314#endif
5315
97dc1359
TM		 5316static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5317 .minor_version = 0,
5318 .call_sync = _nfs4_call_sync,
e047a10c 5319 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5320 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5321 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5322 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5323};
5324
5325#if defined(CONFIG_NFS_V4_1)
5326static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5327 .minor_version = 1,
5328 .call_sync = _nfs4_call_sync_session,
e047a10c 5329 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5330 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5331 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5332 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5333};
5334#endif
5335
97dc1359
TM		 5336const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5337 [0] = &nfs_v4_0_minor_ops,
5338#if defined(CONFIG_NFS_V4_1)
5339 [1] = &nfs_v4_1_minor_ops,
5340#endif
5341};
5342
92e1d5be 5343static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5344 .permission = nfs_permission,
5345 .getattr = nfs_getattr,
5346 .setattr = nfs_setattr,
5347 .getxattr = nfs4_getxattr,
5348 .setxattr = nfs4_setxattr,
5349 .listxattr = nfs4_listxattr,
5350};
5351
509de811 5352const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5353 .version = 4, /* protocol version */
5354 .dentry_ops = &nfs4_dentry_operations,
5355 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5356 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5357 .getroot = nfs4_proc_get_root,
5358 .getattr = nfs4_proc_getattr,
5359 .setattr = nfs4_proc_setattr,
2b3de441 5360 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5361 .lookup = nfs4_proc_lookup,
5362 .access = nfs4_proc_access,
5363 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5364 .create = nfs4_proc_create,
5365 .remove = nfs4_proc_remove,
5366 .unlink_setup = nfs4_proc_unlink_setup,
5367 .unlink_done = nfs4_proc_unlink_done,
5368 .rename = nfs4_proc_rename,
5369 .link = nfs4_proc_link,
5370 .symlink = nfs4_proc_symlink,
5371 .mkdir = nfs4_proc_mkdir,
5372 .rmdir = nfs4_proc_remove,
5373 .readdir = nfs4_proc_readdir,
5374 .mknod = nfs4_proc_mknod,
5375 .statfs = nfs4_proc_statfs,
5376 .fsinfo = nfs4_proc_fsinfo,
5377 .pathconf = nfs4_proc_pathconf,
e9326dca 5378 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5379 .decode_dirent = nfs4_decode_dirent,
5380 .read_setup = nfs4_proc_read_setup,
ec06c096 5381 .read_done = nfs4_read_done,
1da177e4 5382 .write_setup = nfs4_proc_write_setup,
788e7a89 5383 .write_done = nfs4_write_done,
1da177e4 5384 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5385 .commit_done = nfs4_commit_done,
1da177e4 5386 .lock = nfs4_proc_lock,
e50a1c2e 5387 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5388 .close_context = nfs4_close_context,
1da177e4
LT		 5389};
5390
5391/*
5392 * Local variables:
5393 * c-basic-offset: 8
5394 * End:
5395 */
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