projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
SUNRPC: The function rpc_restart_call() should return success/failure
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
5a0e3ad6 42#include <linux/slab.h>
1da177e4
LT		 43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
1da177e4 48#include <linux/namei.h>
02a913a7 49#include <linux/mount.h>
99fe60d0 50#include <linux/module.h>
5a0ffe54 51#include <linux/sunrpc/bc_xprt.h>
1da177e4 52
4ce79717 53#include "nfs4_fs.h"
1da177e4 54#include "delegation.h"
101070ca 55#include "internal.h"
006ea73e 56#include "iostat.h"
fc931582 57#include "callback.h"
1da177e4
LT		 58
59#define NFSDBG_FACILITY NFSDBG_PROC
60
2066fe89 61#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 62#define NFS4_POLL_RETRY_MAX (15*HZ)
63
a78cb57a
TM		 64#define NFS4_MAX_LOOP_ON_RECOVER (10)
65
cdd4e68b 66struct nfs4_opendata;
864472e9 67static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 68static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 69static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 70static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 71static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
72static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 73static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
74 struct nfs_fattr *fattr, struct iattr *sattr,
75 struct nfs4_state *state);
1da177e4 76
1da177e4 77/* Prevent leaks of NFSv4 errors into userland */
46f72f57 78static int nfs4_map_errors(int err)
1da177e4 79{
52567b03
TM		 80 if (err >= -1000)
81 return err;
82 switch (err) {
83 case -NFS4ERR_RESOURCE:
84 return -EREMOTEIO;
85 default:
1da177e4 86 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 87 __func__, -err);
52567b03 88 break;
1da177e4 89 }
52567b03 90 return -EIO;
1da177e4
LT		 91}
92
93/*
94 * This is our standard bitmap for GETATTR requests.
95 */
96const u32 nfs4_fattr_bitmap[2] = {
97 FATTR4_WORD0_TYPE
98 | FATTR4_WORD0_CHANGE
99 | FATTR4_WORD0_SIZE
100 | FATTR4_WORD0_FSID
101 | FATTR4_WORD0_FILEID,
102 FATTR4_WORD1_MODE
103 | FATTR4_WORD1_NUMLINKS
104 | FATTR4_WORD1_OWNER
105 | FATTR4_WORD1_OWNER_GROUP
106 | FATTR4_WORD1_RAWDEV
107 | FATTR4_WORD1_SPACE_USED
108 | FATTR4_WORD1_TIME_ACCESS
109 | FATTR4_WORD1_TIME_METADATA
110 | FATTR4_WORD1_TIME_MODIFY
111};
112
113const u32 nfs4_statfs_bitmap[2] = {
114 FATTR4_WORD0_FILES_AVAIL
115 | FATTR4_WORD0_FILES_FREE
116 | FATTR4_WORD0_FILES_TOTAL,
117 FATTR4_WORD1_SPACE_AVAIL
118 | FATTR4_WORD1_SPACE_FREE
119 | FATTR4_WORD1_SPACE_TOTAL
120};
121
4ce79717 122const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 123 FATTR4_WORD0_MAXLINK
124 | FATTR4_WORD0_MAXNAME,
125 0
126};
127
128const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
129 | FATTR4_WORD0_MAXREAD
130 | FATTR4_WORD0_MAXWRITE
131 | FATTR4_WORD0_LEASE_TIME,
132 0
133};
134
830b8e33
MN		 135const u32 nfs4_fs_locations_bitmap[2] = {
136 FATTR4_WORD0_TYPE
137 | FATTR4_WORD0_CHANGE
138 | FATTR4_WORD0_SIZE
139 | FATTR4_WORD0_FSID
140 | FATTR4_WORD0_FILEID
141 | FATTR4_WORD0_FS_LOCATIONS,
142 FATTR4_WORD1_MODE
143 | FATTR4_WORD1_NUMLINKS
144 | FATTR4_WORD1_OWNER
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY
151 | FATTR4_WORD1_MOUNTED_ON_FILEID
152};
153
bc4785cd 154static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 155 struct nfs4_readdir_arg *readdir)
156{
0dbb4c67 157 __be32 *start, *p;
1da177e4
LT		 158
159 BUG_ON(readdir->count < 80);
160 if (cookie > 2) {
b7ef1956 161 readdir->cookie = cookie;
1da177e4
LT		 162 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
163 return;
164 }
165
166 readdir->cookie = 0;
167 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
168 if (cookie == 2)
169 return;
170
171 /*
172 * NFSv4 servers do not return entries for '.' and '..'
173 * Therefore, we fake these entries here. We let '.'
174 * have cookie 0 and '..' have cookie 1. Note that
175 * when talking to the server, we always send cookie 0
176 * instead of 1 or 2.
177 */
0dbb4c67 178 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 179
180 if (cookie == 0) {
181 *p++ = xdr_one; /* next */
182 *p++ = xdr_zero; /* cookie, first word */
183 *p++ = xdr_one; /* cookie, second word */
184 *p++ = xdr_one; /* entry len */
185 memcpy(p, ".\0\0\0", 4); /* entry */
186 p++;
187 *p++ = xdr_one; /* bitmap length */
188 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
189 *p++ = htonl(8); /* attribute buffer length */
4e769b93 190 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 191 }
192
193 *p++ = xdr_one; /* next */
194 *p++ = xdr_zero; /* cookie, first word */
195 *p++ = xdr_two; /* cookie, second word */
196 *p++ = xdr_two; /* entry len */
197 memcpy(p, "..\0\0", 4); /* entry */
198 p++;
199 *p++ = xdr_one; /* bitmap length */
200 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
201 *p++ = htonl(8); /* attribute buffer length */
4e769b93 202 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 203
204 readdir->pgbase = (char *)p - (char *)start;
205 readdir->count -= readdir->pgbase;
206 kunmap_atomic(start, KM_USER0);
207}
208
65de872e
TM		 209static int nfs4_wait_clnt_recover(struct nfs_client *clp)
210{
211 int res;
212
213 might_sleep();
214
e005e804 215 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 216 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 217 return res;
218}
219
220static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
221{
222 int res = 0;
223
224 might_sleep();
225
226 if (*timeout <= 0)
227 *timeout = NFS4_POLL_RETRY_MIN;
228 if (*timeout > NFS4_POLL_RETRY_MAX)
229 *timeout = NFS4_POLL_RETRY_MAX;
230 schedule_timeout_killable(*timeout);
231 if (fatal_signal_pending(current))
232 res = -ERESTARTSYS;
233 *timeout <<= 1;
234 return res;
235}
236
237/* This is the error handling routine for processes that are allowed
238 * to sleep.
239 */
240static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
241{
242 struct nfs_client *clp = server->nfs_client;
9e33bed5 243 struct nfs4_state *state = exception->state;
65de872e
TM		 244 int ret = errorcode;
245
246 exception->retry = 0;
247 switch(errorcode) {
248 case 0:
249 return 0;
9e33bed5
TM		 250 case -NFS4ERR_ADMIN_REVOKED:
251 case -NFS4ERR_BAD_STATEID:
252 case -NFS4ERR_OPENMODE:
253 if (state == NULL)
254 break;
255 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 256 goto do_state_recovery;
65de872e 257 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 258 if (state == NULL)
259 break;
260 nfs4_state_mark_reclaim_reboot(clp, state);
261 case -NFS4ERR_STALE_CLIENTID:
65de872e 262 case -NFS4ERR_EXPIRED:
a2c0b9e2 263 goto do_state_recovery;
03391693 264#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 265 case -NFS4ERR_BADSESSION:
266 case -NFS4ERR_BADSLOT:
267 case -NFS4ERR_BAD_HIGH_SLOT:
268 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
269 case -NFS4ERR_DEADSESSION:
270 case -NFS4ERR_SEQ_FALSE_RETRY:
271 case -NFS4ERR_SEQ_MISORDERED:
272 dprintk("%s ERROR: %d Reset session\n", __func__,
273 errorcode);
0b9e2d41 274 nfs4_schedule_state_recovery(clp);
4745e315 275 exception->retry = 1;
b9179237 276 break;
03391693 277#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 278 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 279 if (exception->timeout > HZ) {
280 /* We have retried a decent amount, time to
281 * fail
282 */
283 ret = -EBUSY;
284 break;
285 }
65de872e
TM		 286 case -NFS4ERR_GRACE:
287 case -NFS4ERR_DELAY:
2c643488 288 case -EKEYEXPIRED:
65de872e
TM		 289 ret = nfs4_delay(server->client, &exception->timeout);
290 if (ret != 0)
291 break;
292 case -NFS4ERR_OLD_STATEID:
293 exception->retry = 1;
294 }
295 /* We failed to handle the error */
296 return nfs4_map_errors(ret);
a2c0b9e2
TM		 297do_state_recovery:
298 nfs4_schedule_state_recovery(clp);
299 ret = nfs4_wait_clnt_recover(clp);
300 if (ret == 0)
301 exception->retry = 1;
302 return ret;
65de872e
TM		 303}
304
305
452e9352 306static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 307{
1da177e4
LT		 308 spin_lock(&clp->cl_lock);
309 if (time_before(clp->cl_last_renewal,timestamp))
310 clp->cl_last_renewal = timestamp;
311 spin_unlock(&clp->cl_lock);
312}
313
452e9352
TM		 314static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
315{
316 do_renew_lease(server->nfs_client, timestamp);
317}
318
cccef3b9
AA		 319#if defined(CONFIG_NFS_V4_1)
320
e2c4ab3c
AA		 321/*
322 * nfs4_free_slot - free a slot and efficiently update slot table.
323 *
324 * freeing a slot is trivially done by clearing its respective bit
325 * in the bitmap.
326 * If the freed slotid equals highest_used_slotid we want to update it
327 * so that the server would be able to size down the slot table if needed,
328 * otherwise we know that the highest_used_slotid is still in use.
329 * When updating highest_used_slotid there may be "holes" in the bitmap
330 * so we need to scan down from highest_used_slotid to 0 looking for the now
331 * highest slotid in use.
332 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 333 *
334 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 335 */
336static void
337nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
338{
339 int slotid = free_slotid;
340
e2c4ab3c
AA		 341 /* clear used bit in bitmap */
342 __clear_bit(slotid, tbl->used_slots);
343
344 /* update highest_used_slotid when it is freed */
345 if (slotid == tbl->highest_used_slotid) {
346 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 347 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 348 tbl->highest_used_slotid = slotid;
349 else
350 tbl->highest_used_slotid = -1;
351 }
e2c4ab3c
AA		 352 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
353 free_slotid, tbl->highest_used_slotid);
354}
355
3bfb0fc5
AB		 356/*
357 * Signal state manager thread if session is drained
358 */
359static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
360{
689cf5c1
AB		 361 struct rpc_task *task;
362
a2118c33 363 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 364 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
365 if (task)
366 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 367 return;
368 }
369
370 if (ses->fc_slot_table.highest_used_slotid != -1)
371 return;
372
373 dprintk("%s COMPLETE: Session Drained\n", __func__);
374 complete(&ses->complete);
375}
376
d185a334 377static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 378{
379 struct nfs4_slot_table *tbl;
380
d185a334 381 tbl = &res->sr_session->fc_slot_table;
13615871 382 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 383 /* just wake up the next guy waiting since
384 * we may have not consumed a slot after all */
691daf3b 385 dprintk("%s: No slot\n", __func__);
35dc1d74 386 return;
13615871 387 }
ea028ac9 388
35dc1d74
TM		 389 spin_lock(&tbl->slot_tbl_lock);
390 nfs4_free_slot(tbl, res->sr_slotid);
d185a334 391 nfs41_check_drain_session_complete(res->sr_session);
35dc1d74
TM		 392 spin_unlock(&tbl->slot_tbl_lock);
393 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 394}
395
14516c3a 396static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 397{
398 unsigned long timestamp;
399 struct nfs4_slot_table *tbl;
400 struct nfs4_slot *slot;
14516c3a 401 struct nfs_client *clp;
b0df806c
AA		 402
403 /*
404 * sr_status remains 1 if an RPC level error occurred. The server
405 * may or may not have processed the sequence operation..
406 * Proceed as if the server received and processed the sequence
407 * operation.
408 */
409 if (res->sr_status == 1)
410 res->sr_status = NFS_OK;
411
412 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
413 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
414 goto out;
415
14516c3a
TM		 416 tbl = &res->sr_session->fc_slot_table;
417 slot = tbl->slots + res->sr_slotid;
418
691daf3b 419 /* Check the SEQUENCE operation status */
14516c3a
TM		 420 switch (res->sr_status) {
421 case 0:
b0df806c
AA		 422 /* Update the slot's sequence and clientid lease timer */
423 ++slot->seq_nr;
424 timestamp = res->sr_renewal_time;
14516c3a 425 clp = res->sr_session->clp;
452e9352 426 do_renew_lease(clp, timestamp);
0629e370 427 /* Check sequence flags */
7135840f
AB		 428 if (atomic_read(&clp->cl_count) > 1)
429 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
14516c3a
TM		 430 break;
431 case -NFS4ERR_DELAY:
432 /* The server detected a resend of the RPC call and
433 * returned NFS4ERR_DELAY as per Section 2.10.6.2
434 * of RFC5661.
435 */
436 dprintk("%s: slot=%d seq=%d: Operation in progress\n",
437 __func__, res->sr_slotid, slot->seq_nr);
438 goto out_retry;
439 default:
440 /* Just update the slot sequence no. */
441 ++slot->seq_nr;
b0df806c
AA		 442 }
443out:
444 /* The session may be reset by one of the error handlers. */
445 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 446 nfs41_sequence_free_slot(res);
14516c3a
TM		 447 return 1;
448out_retry:
449 rpc_restart_call(task);
450 /* FIXME: rpc_restart_call() should be made to return success/fail */
451 if (task->tk_action == NULL)
452 goto out;
453 rpc_delay(task, NFS4_POLL_RETRY_MAX);
454 return 0;
b0df806c
AA		 455}
456
14516c3a
TM		 457static int nfs4_sequence_done(struct rpc_task *task,
458 struct nfs4_sequence_res *res)
df896455 459{
14516c3a
TM		 460 if (res->sr_session == NULL)
461 return 1;
462 return nfs41_sequence_done(task, res);
df896455
TM		 463}
464
510b8175
BH		 465/*
466 * nfs4_find_slot - efficiently look for a free slot
467 *
468 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
469 * If found, we mark the slot as used, update the highest_used_slotid,
470 * and respectively set up the sequence operation args.
471 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 472 *
473 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 474 */
475static u8
40ead580 476nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 477{
478 int slotid;
479 u8 ret_id = NFS4_MAX_SLOT_TABLE;
480 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
481
510b8175
BH		 482 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
483 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
484 tbl->max_slots);
485 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
486 if (slotid >= tbl->max_slots)
487 goto out;
488 __set_bit(slotid, tbl->used_slots);
489 if (slotid > tbl->highest_used_slotid)
490 tbl->highest_used_slotid = slotid;
491 ret_id = slotid;
492out:
493 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
494 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 495 return ret_id;
496}
497
ce5039c1
AA		 498static int nfs41_setup_sequence(struct nfs4_session *session,
499 struct nfs4_sequence_args *args,
500 struct nfs4_sequence_res *res,
501 int cache_reply,
502 struct rpc_task *task)
503{
fbcd4abc
AA		 504 struct nfs4_slot *slot;
505 struct nfs4_slot_table *tbl;
506 u8 slotid;
507
508 dprintk("--> %s\n", __func__);
ce5039c1
AA		 509 /* slot already allocated? */
510 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
511 return 0;
512
ce5039c1 513 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 514 tbl = &session->fc_slot_table;
515
516 spin_lock(&tbl->slot_tbl_lock);
a2118c33 517 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 518 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 519 /*
520 * The state manager will wait until the slot table is empty.
521 * Schedule the reset thread
522 */
05f0d236 523 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 524 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 525 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 526 return -EAGAIN;
b069d94a
AA		 527 }
528
689cf5c1
AB		 529 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
530 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
533 dprintk("%s enforce FIFO order\n", __func__);
534 return -EAGAIN;
535 }
536
40ead580 537 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 538 if (slotid == NFS4_MAX_SLOT_TABLE) {
539 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
540 spin_unlock(&tbl->slot_tbl_lock);
541 dprintk("<-- %s: no free slots\n", __func__);
542 return -EAGAIN;
543 }
544 spin_unlock(&tbl->slot_tbl_lock);
545
689cf5c1 546 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 547 slot = tbl->slots + slotid;
99fe60d0 548 args->sa_session = session;
fbcd4abc
AA		 549 args->sa_slotid = slotid;
550 args->sa_cache_this = cache_reply;
551
552 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
553
99fe60d0 554 res->sr_session = session;
fbcd4abc
AA		 555 res->sr_slotid = slotid;
556 res->sr_renewal_time = jiffies;
2a6e26cd 557 res->sr_status_flags = 0;
fbcd4abc
AA		 558 /*
559 * sr_status is only set in decode_sequence, and so will remain
560 * set to 1 if an rpc level failure occurs.
561 */
562 res->sr_status = 1;
ce5039c1
AA		 563 return 0;
564}
565
035168ab 566int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 567 struct nfs4_sequence_args *args,
568 struct nfs4_sequence_res *res,
569 int cache_reply,
570 struct rpc_task *task)
571{
035168ab 572 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 573 int ret = 0;
574
035168ab
TM		 575 if (session == NULL) {
576 args->sa_session = NULL;
577 res->sr_session = NULL;
578 goto out;
579 }
580
ce5039c1 581 dprintk("--> %s clp %p session %p sr_slotid %d\n",
035168ab 582 __func__, session->clp, session, res->sr_slotid);
ce5039c1 583
035168ab 584 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 585 task);
ce5039c1
AA		 586out:
587 dprintk("<-- %s status=%d\n", __func__, ret);
588 return ret;
589}
590
591struct nfs41_call_sync_data {
035168ab 592 const struct nfs_server *seq_server;
ce5039c1
AA		 593 struct nfs4_sequence_args *seq_args;
594 struct nfs4_sequence_res *seq_res;
595 int cache_reply;
596};
597
598static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
599{
600 struct nfs41_call_sync_data *data = calldata;
601
035168ab
TM		 602 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
603
604 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 605 data->seq_res, data->cache_reply, task))
606 return;
607 rpc_call_start(task);
608}
609
b257957e
AB		 610static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
611{
612 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
613 nfs41_call_sync_prepare(task, calldata);
614}
615
69ab40c4
AA		 616static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
617{
618 struct nfs41_call_sync_data *data = calldata;
619
14516c3a 620 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 621}
622
ce5039c1
AA		 623struct rpc_call_ops nfs41_call_sync_ops = {
624 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 625 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 626};
627
b257957e
AB		 628struct rpc_call_ops nfs41_call_priv_sync_ops = {
629 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
630 .rpc_call_done = nfs41_call_sync_done,
631};
632
035168ab 633static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 634 struct rpc_message *msg,
635 struct nfs4_sequence_args *args,
636 struct nfs4_sequence_res *res,
b257957e
AB		 637 int cache_reply,
638 int privileged)
ce5039c1
AA		 639{
640 int ret;
641 struct rpc_task *task;
642 struct nfs41_call_sync_data data = {
035168ab 643 .seq_server = server,
ce5039c1
AA		 644 .seq_args = args,
645 .seq_res = res,
646 .cache_reply = cache_reply,
647 };
648 struct rpc_task_setup task_setup = {
035168ab 649 .rpc_client = server->client,
ce5039c1
AA		 650 .rpc_message = msg,
651 .callback_ops = &nfs41_call_sync_ops,
652 .callback_data = &data
653 };
654
655 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 656 if (privileged)
657 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 658 task = rpc_run_task(&task_setup);
659 if (IS_ERR(task))
660 ret = PTR_ERR(task);
661 else {
662 ret = task->tk_status;
663 rpc_put_task(task);
664 }
665 return ret;
666}
667
cccef3b9
AA		 668int _nfs4_call_sync_session(struct nfs_server *server,
669 struct rpc_message *msg,
670 struct nfs4_sequence_args *args,
671 struct nfs4_sequence_res *res,
672 int cache_reply)
673{
035168ab 674 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 675}
676
df896455 677#else
14516c3a
TM		 678static int nfs4_sequence_done(struct rpc_task *task,
679 struct nfs4_sequence_res *res)
df896455 680{
14516c3a 681 return 1;
df896455 682}
cccef3b9
AA		 683#endif /* CONFIG_NFS_V4_1 */
684
685int _nfs4_call_sync(struct nfs_server *server,
686 struct rpc_message *msg,
687 struct nfs4_sequence_args *args,
688 struct nfs4_sequence_res *res,
689 int cache_reply)
690{
f3752975 691 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 692 return rpc_call_sync(server->client, msg, 0);
693}
694
695#define nfs4_call_sync(server, msg, args, res, cache_reply) \
97dc1359 696 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
cccef3b9
AA		 697 &(res)->seq_res, (cache_reply))
698
38478b24 699static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 700{
38478b24 701 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 702
38478b24 703 spin_lock(&dir->i_lock);
40d24704
TM		 704 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
705 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 706 nfs_force_lookup_revalidate(dir);
40d24704 707 nfsi->change_attr = cinfo->after;
38478b24 708 spin_unlock(&dir->i_lock);
1da177e4
LT		 709}
710
e56e0b78 711struct nfs4_opendata {
c6d00e63 712 struct kref kref;
e56e0b78
TM		 713 struct nfs_openargs o_arg;
714 struct nfs_openres o_res;
cdd4e68b
TM		 715 struct nfs_open_confirmargs c_arg;
716 struct nfs_open_confirmres c_res;
e56e0b78
TM		 717 struct nfs_fattr f_attr;
718 struct nfs_fattr dir_attr;
ad389da7 719 struct path path;
e56e0b78
TM		 720 struct dentry *dir;
721 struct nfs4_state_owner *owner;
aac00a8d 722 struct nfs4_state *state;
e56e0b78 723 struct iattr attrs;
26e976a8 724 unsigned long timestamp;
3e309914 725 unsigned int rpc_done : 1;
24ac23ab
TM		 726 int rpc_status;
727 int cancelled;
e56e0b78
TM		 728};
729
2ced46c2
TM		 730
731static void nfs4_init_opendata_res(struct nfs4_opendata *p)
732{
733 p->o_res.f_attr = &p->f_attr;
734 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 735 p->o_res.seqid = p->o_arg.seqid;
736 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 737 p->o_res.server = p->o_arg.server;
738 nfs_fattr_init(&p->f_attr);
739 nfs_fattr_init(&p->dir_attr);
578e4585 740 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 741}
742
ad389da7 743static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 744 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 745 const struct iattr *attrs,
746 gfp_t gfp_mask)
e56e0b78 747{
ad389da7 748 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 749 struct inode *dir = parent->d_inode;
750 struct nfs_server *server = NFS_SERVER(dir);
751 struct nfs4_opendata *p;
752
8535b2be 753 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 754 if (p == NULL)
755 goto err;
8535b2be 756 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 757 if (p->o_arg.seqid == NULL)
758 goto err_free;
f6948697
AV		 759 path_get(path);
760 p->path = *path;
e56e0b78
TM		 761 p->dir = parent;
762 p->owner = sp;
763 atomic_inc(&sp->so_count);
764 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 765 p->o_arg.open_flags = flags;
766 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 767 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 768 p->o_arg.id = sp->so_owner_id.id;
ad389da7 769 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 770 p->o_arg.server = server;
771 p->o_arg.bitmask = server->attr_bitmask;
772 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 773 if (flags & O_CREAT) {
774 u32 *s;
775
e56e0b78
TM		 776 p->o_arg.u.attrs = &p->attrs;
777 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 778 s = (u32 *) p->o_arg.u.verifier.data;
779 s[0] = jiffies;
780 s[1] = current->pid;
e56e0b78 781 }
cdd4e68b
TM		 782 p->c_arg.fh = &p->o_res.fh;
783 p->c_arg.stateid = &p->o_res.stateid;
784 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 785 nfs4_init_opendata_res(p);
c6d00e63 786 kref_init(&p->kref);
e56e0b78
TM		 787 return p;
788err_free:
789 kfree(p);
790err:
791 dput(parent);
792 return NULL;
793}
794
c6d00e63 795static void nfs4_opendata_free(struct kref *kref)
e56e0b78 796{
c6d00e63
TM		 797 struct nfs4_opendata *p = container_of(kref,
798 struct nfs4_opendata, kref);
799
800 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 801 if (p->state != NULL)
802 nfs4_put_open_state(p->state);
c6d00e63
TM		 803 nfs4_put_state_owner(p->owner);
804 dput(p->dir);
31f31db1 805 path_put(&p->path);
c6d00e63
TM		 806 kfree(p);
807}
808
809static void nfs4_opendata_put(struct nfs4_opendata *p)
810{
811 if (p != NULL)
812 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 813}
814
06f814a3
TM		 815static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
816{
06f814a3
TM		 817 int ret;
818
06f814a3 819 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 820 return ret;
821}
822
dc0b027d 823static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 824{
825 int ret = 0;
dc0b027d
TM		 826
827 if (open_mode & O_EXCL)
828 goto out;
829 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 830 case FMODE_READ:
88069f77
TM		 831 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
832 && state->n_rdonly != 0;
6ee41268
TM		 833 break;
834 case FMODE_WRITE:
88069f77
TM		 835 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
836 && state->n_wronly != 0;
6ee41268
TM		 837 break;
838 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 839 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
840 && state->n_rdwr != 0;
6ee41268 841 }
dc0b027d 842out:
6ee41268
TM		 843 return ret;
844}
845
dc0b027d 846static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 847{
dc0b027d 848 if ((delegation->type & fmode) != fmode)
aac00a8d 849 return 0;
15c831bf 850 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 851 return 0;
b7391f44 852 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 853 return 1;
854}
855
dc0b027d 856static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 857{
dc0b027d 858 switch (fmode) {
e7616923
TM		 859 case FMODE_WRITE:
860 state->n_wronly++;
861 break;
862 case FMODE_READ:
863 state->n_rdonly++;
864 break;
865 case FMODE_READ|FMODE_WRITE:
866 state->n_rdwr++;
867 }
dc0b027d 868 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 869}
870
dc0b027d 871static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 872{
873 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
874 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
875 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 876 switch (fmode) {
003707c7
TM		 877 case FMODE_READ:
878 set_bit(NFS_O_RDONLY_STATE, &state->flags);
879 break;
880 case FMODE_WRITE:
881 set_bit(NFS_O_WRONLY_STATE, &state->flags);
882 break;
883 case FMODE_READ|FMODE_WRITE:
884 set_bit(NFS_O_RDWR_STATE, &state->flags);
885 }
e7616923
TM		 886}
887
dc0b027d 888static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 889{
8bda4e4c 890 write_seqlock(&state->seqlock);
dc0b027d 891 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 892 write_sequnlock(&state->seqlock);
003707c7
TM		 893}
894
dc0b027d 895static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 896{
8bda4e4c
TM		 897 /*
898 * Protect the call to nfs4_state_set_mode_locked and
899 * serialise the stateid update
900 */
901 write_seqlock(&state->seqlock);
003707c7
TM		 902 if (deleg_stateid != NULL) {
903 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
904 set_bit(NFS_DELEGATED_STATE, &state->flags);
905 }
906 if (open_stateid != NULL)
dc0b027d 907 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 908 write_sequnlock(&state->seqlock);
909 spin_lock(&state->owner->so_lock);
dc0b027d 910 update_open_stateflags(state, fmode);
ec073428 911 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 912}
913
dc0b027d 914static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 915{
916 struct nfs_inode *nfsi = NFS_I(state->inode);
917 struct nfs_delegation *deleg_cur;
918 int ret = 0;
919
dc0b027d 920 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 921
922 rcu_read_lock();
923 deleg_cur = rcu_dereference(nfsi->delegation);
924 if (deleg_cur == NULL)
925 goto no_delegation;
926
927 spin_lock(&deleg_cur->lock);
928 if (nfsi->delegation != deleg_cur ||
dc0b027d 929 (deleg_cur->type & fmode) != fmode)
34310430
TM		 930 goto no_delegation_unlock;
931
932 if (delegation == NULL)
933 delegation = &deleg_cur->stateid;
934 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
935 goto no_delegation_unlock;
936
b7391f44 937 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 938 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 939 ret = 1;
940no_delegation_unlock:
941 spin_unlock(&deleg_cur->lock);
942no_delegation:
943 rcu_read_unlock();
944
945 if (!ret && open_stateid != NULL) {
dc0b027d 946 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 947 ret = 1;
948 }
949
950 return ret;
951}
952
953
dc0b027d 954static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 955{
956 struct nfs_delegation *delegation;
957
958 rcu_read_lock();
959 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 960 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 961 rcu_read_unlock();
962 return;
963 }
964 rcu_read_unlock();
965 nfs_inode_return_delegation(inode);
966}
967
6ee41268 968static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 969{
970 struct nfs4_state *state = opendata->state;
971 struct nfs_inode *nfsi = NFS_I(state->inode);
972 struct nfs_delegation *delegation;
dc0b027d
TM		 973 int open_mode = opendata->o_arg.open_flags & O_EXCL;
974 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 975 nfs4_stateid stateid;
976 int ret = -EAGAIN;
977
aac00a8d 978 for (;;) {
dc0b027d 979 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 980 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 981 if (can_open_cached(state, fmode, open_mode)) {
982 update_open_stateflags(state, fmode);
6ee41268 983 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 984 goto out_return_state;
985 }
986 spin_unlock(&state->owner->so_lock);
987 }
34310430
TM		 988 rcu_read_lock();
989 delegation = rcu_dereference(nfsi->delegation);
990 if (delegation == NULL ||
dc0b027d 991 !can_open_delegated(delegation, fmode)) {
34310430 992 rcu_read_unlock();
aac00a8d 993 break;
34310430 994 }
aac00a8d
TM		 995 /* Save the delegation */
996 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
997 rcu_read_unlock();
af22f94a 998 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 999 if (ret != 0)
1000 goto out;
1001 ret = -EAGAIN;
34310430
TM		 1002
1003 /* Try to update the stateid using the delegation */
dc0b027d 1004 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1005 goto out_return_state;
aac00a8d 1006 }
aac00a8d
TM		 1007out:
1008 return ERR_PTR(ret);
1009out_return_state:
1010 atomic_inc(&state->count);
1011 return state;
1012}
1013
24ac23ab
TM		 1014static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1015{
1016 struct inode *inode;
1017 struct nfs4_state *state = NULL;
003707c7 1018 struct nfs_delegation *delegation;
1b370bc2 1019 int ret;
24ac23ab 1020
aac00a8d 1021 if (!data->rpc_done) {
6ee41268 1022 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1023 goto out;
1024 }
1025
1b370bc2 1026 ret = -EAGAIN;
24ac23ab 1027 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1028 goto err;
24ac23ab 1029 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1030 ret = PTR_ERR(inode);
03f28e3a 1031 if (IS_ERR(inode))
1b370bc2
TM		 1032 goto err;
1033 ret = -ENOMEM;
24ac23ab
TM		 1034 state = nfs4_get_open_state(inode, data->owner);
1035 if (state == NULL)
1b370bc2 1036 goto err_put_inode;
549d6ed5 1037 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1038 int delegation_flags = 0;
1039
003707c7
TM		 1040 rcu_read_lock();
1041 delegation = rcu_dereference(NFS_I(inode)->delegation);
1042 if (delegation)
1043 delegation_flags = delegation->flags;
1044 rcu_read_unlock();
15c831bf 1045 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1046 nfs_inode_set_delegation(state->inode,
1047 data->owner->so_cred,
1048 &data->o_res);
1049 else
1050 nfs_inode_reclaim_delegation(state->inode,
1051 data->owner->so_cred,
1052 &data->o_res);
1053 }
34310430
TM		 1054
1055 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1056 data->o_arg.fmode);
24ac23ab 1057 iput(inode);
aac00a8d 1058out:
24ac23ab 1059 return state;
1b370bc2
TM		 1060err_put_inode:
1061 iput(inode);
1062err:
1063 return ERR_PTR(ret);
24ac23ab
TM		 1064}
1065
864472e9
TM		 1066static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1067{
1068 struct nfs_inode *nfsi = NFS_I(state->inode);
1069 struct nfs_open_context *ctx;
1070
1071 spin_lock(&state->inode->i_lock);
1072 list_for_each_entry(ctx, &nfsi->open_files, list) {
1073 if (ctx->state != state)
1074 continue;
1075 get_nfs_open_context(ctx);
1076 spin_unlock(&state->inode->i_lock);
1077 return ctx;
1078 }
1079 spin_unlock(&state->inode->i_lock);
1080 return ERR_PTR(-ENOENT);
1081}
1082
6f220ed5
TM		 1083static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1084{
1085 struct nfs4_opendata *opendata;
1086
8535b2be 1087 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1088 if (opendata == NULL)
1089 return ERR_PTR(-ENOMEM);
1090 opendata->state = state;
1091 atomic_inc(&state->count);
1092 return opendata;
1093}
1094
dc0b027d 1095static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1096{
2ced46c2 1097 struct nfs4_state *newstate;
864472e9
TM		 1098 int ret;
1099
dc0b027d
TM		 1100 opendata->o_arg.open_flags = 0;
1101 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1102 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1103 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1104 nfs4_init_opendata_res(opendata);
b257957e 1105 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1106 if (ret != 0)
1107 return ret;
2ced46c2 1108 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1109 if (IS_ERR(newstate))
1110 return PTR_ERR(newstate);
dc0b027d 1111 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1112 *res = newstate;
864472e9
TM		 1113 return 0;
1114}
1115
1116static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1117{
864472e9 1118 struct nfs4_state *newstate;
864472e9
TM		 1119 int ret;
1120
1121 /* memory barrier prior to reading state->n_* */
2ced46c2 1122 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1123 smp_rmb();
1124 if (state->n_rdwr != 0) {
2ced46c2 1125 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1126 if (ret != 0)
1127 return ret;
2ced46c2
TM		 1128 if (newstate != state)
1129 return -ESTALE;
864472e9
TM		 1130 }
1131 if (state->n_wronly != 0) {
2ced46c2 1132 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1133 if (ret != 0)
1134 return ret;
2ced46c2
TM		 1135 if (newstate != state)
1136 return -ESTALE;
864472e9
TM		 1137 }
1138 if (state->n_rdonly != 0) {
2ced46c2 1139 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1140 if (ret != 0)
1141 return ret;
2ced46c2
TM		 1142 if (newstate != state)
1143 return -ESTALE;
864472e9 1144 }
1ac7e2fd
TM		 1145 /*
1146 * We may have performed cached opens for all three recoveries.
1147 * Check if we need to update the current stateid.
1148 */
1149 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1150 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1151 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1152 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1153 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1154 write_sequnlock(&state->seqlock);
1ac7e2fd 1155 }
864472e9
TM		 1156 return 0;
1157}
1158
1da177e4
LT		 1159/*
1160 * OPEN_RECLAIM:
1161 * reclaim state on the server after a reboot.
1da177e4 1162 */
539cd03a 1163static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1164{
1ac7e2fd 1165 struct nfs_delegation *delegation;
864472e9 1166 struct nfs4_opendata *opendata;
dc0b027d 1167 fmode_t delegation_type = 0;
1da177e4
LT		 1168 int status;
1169
6f220ed5
TM		 1170 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1171 if (IS_ERR(opendata))
1172 return PTR_ERR(opendata);
864472e9
TM		 1173 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1174 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1175 rcu_read_lock();
1176 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1177 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1178 delegation_type = delegation->type;
1ac7e2fd 1179 rcu_read_unlock();
864472e9
TM		 1180 opendata->o_arg.u.delegation_type = delegation_type;
1181 status = nfs4_open_recover(opendata, state);
c6d00e63 1182 nfs4_opendata_put(opendata);
1da177e4
LT		 1183 return status;
1184}
1185
539cd03a 1186static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1187{
1188 struct nfs_server *server = NFS_SERVER(state->inode);
1189 struct nfs4_exception exception = { };
1190 int err;
1191 do {
539cd03a 1192 err = _nfs4_do_open_reclaim(ctx, state);
2c643488 1193 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 1194 break;
1195 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1196 } while (exception.retry);
1197 return err;
1198}
1199
864472e9
TM		 1200static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1201{
1202 struct nfs_open_context *ctx;
1203 int ret;
1204
1205 ctx = nfs4_state_find_open_context(state);
1206 if (IS_ERR(ctx))
1207 return PTR_ERR(ctx);
539cd03a 1208 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1209 put_nfs_open_context(ctx);
1210 return ret;
1211}
1212
13437e12 1213static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1214{
e56e0b78 1215 struct nfs4_opendata *opendata;
864472e9 1216 int ret;
1da177e4 1217
6f220ed5
TM		 1218 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1219 if (IS_ERR(opendata))
1220 return PTR_ERR(opendata);
e56e0b78 1221 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1222 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1223 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1224 ret = nfs4_open_recover(opendata, state);
c6d00e63 1225 nfs4_opendata_put(opendata);
864472e9 1226 return ret;
1da177e4
LT		 1227}
1228
13437e12 1229int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1230{
1231 struct nfs4_exception exception = { };
539cd03a 1232 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1233 int err;
1234 do {
13437e12 1235 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1236 switch (err) {
1237 case 0:
965b5d67
TM		 1238 case -ENOENT:
1239 case -ESTALE:
1240 goto out;
bcfa49f6
RL		 1241 case -NFS4ERR_BADSESSION:
1242 case -NFS4ERR_BADSLOT:
1243 case -NFS4ERR_BAD_HIGH_SLOT:
1244 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1245 case -NFS4ERR_DEADSESSION:
1246 nfs4_schedule_state_recovery(
1247 server->nfs_client);
1248 goto out;
1da177e4
LT		 1249 case -NFS4ERR_STALE_CLIENTID:
1250 case -NFS4ERR_STALE_STATEID:
1251 case -NFS4ERR_EXPIRED:
1252 /* Don't recall a delegation if it was lost */
7539bbab 1253 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1254 goto out;
1255 case -ERESTARTSYS:
1256 /*
1257 * The show must go on: exit, but mark the
1258 * stateid as needing recovery.
1259 */
1260 case -NFS4ERR_ADMIN_REVOKED:
1261 case -NFS4ERR_BAD_STATEID:
1262 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1263 case -ENOMEM:
1264 err = 0;
1265 goto out;
1da177e4
LT		 1266 }
1267 err = nfs4_handle_exception(server, err, &exception);
1268 } while (exception.retry);
965b5d67 1269out:
1da177e4
LT		 1270 return err;
1271}
1272
cdd4e68b
TM		 1273static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1274{
1275 struct nfs4_opendata *data = calldata;
1276
1277 data->rpc_status = task->tk_status;
26e976a8 1278 if (data->rpc_status == 0) {
cdd4e68b
TM		 1279 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1280 sizeof(data->o_res.stateid.data));
bb22629e 1281 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1282 renew_lease(data->o_res.server, data->timestamp);
3e309914 1283 data->rpc_done = 1;
26e976a8 1284 }
cdd4e68b
TM		 1285}
1286
1287static void nfs4_open_confirm_release(void *calldata)
1288{
1289 struct nfs4_opendata *data = calldata;
1290 struct nfs4_state *state = NULL;
1291
1292 /* If this request hasn't been cancelled, do nothing */
1293 if (data->cancelled == 0)
1294 goto out_free;
1295 /* In case of error, no cleanup! */
3e309914 1296 if (!data->rpc_done)
cdd4e68b 1297 goto out_free;
cdd4e68b 1298 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1299 if (!IS_ERR(state))
dc0b027d 1300 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1301out_free:
c6d00e63 1302 nfs4_opendata_put(data);
cdd4e68b
TM		 1303}
1304
1305static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1306 .rpc_call_done = nfs4_open_confirm_done,
1307 .rpc_release = nfs4_open_confirm_release,
1308};
1309
1310/*
1311 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1312 */
1313static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1314{
1315 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1316 struct rpc_task *task;
5138fde0
TM		 1317 struct rpc_message msg = {
1318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1319 .rpc_argp = &data->c_arg,
1320 .rpc_resp = &data->c_res,
1321 .rpc_cred = data->owner->so_cred,
1322 };
c970aa85
TM		 1323 struct rpc_task_setup task_setup_data = {
1324 .rpc_client = server->client,
5138fde0 1325 .rpc_message = &msg,
c970aa85
TM		 1326 .callback_ops = &nfs4_open_confirm_ops,
1327 .callback_data = data,
101070ca 1328 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1329 .flags = RPC_TASK_ASYNC,
1330 };
1da177e4
LT		 1331 int status;
1332
c6d00e63 1333 kref_get(&data->kref);
3e309914
TM		 1334 data->rpc_done = 0;
1335 data->rpc_status = 0;
5138fde0 1336 data->timestamp = jiffies;
c970aa85 1337 task = rpc_run_task(&task_setup_data);
7a1218a2 1338 if (IS_ERR(task))
cdd4e68b 1339 return PTR_ERR(task);
cdd4e68b
TM		 1340 status = nfs4_wait_for_completion_rpc_task(task);
1341 if (status != 0) {
1342 data->cancelled = 1;
1343 smp_wmb();
1344 } else
1345 status = data->rpc_status;
e6b3c4db 1346 rpc_put_task(task);
1da177e4
LT		 1347 return status;
1348}
1349
24ac23ab 1350static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1351{
24ac23ab
TM		 1352 struct nfs4_opendata *data = calldata;
1353 struct nfs4_state_owner *sp = data->owner;
5138fde0 1354
24ac23ab
TM		 1355 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1356 return;
aac00a8d
TM		 1357 /*
1358 * Check if we still need to send an OPEN call, or if we can use
1359 * a delegation instead.
1360 */
1361 if (data->state != NULL) {
1362 struct nfs_delegation *delegation;
1363
dc0b027d 1364 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1365 goto out_no_action;
aac00a8d
TM		 1366 rcu_read_lock();
1367 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1368 if (delegation != NULL &&
15c831bf 1369 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1370 rcu_read_unlock();
6ee41268 1371 goto out_no_action;
aac00a8d
TM		 1372 }
1373 rcu_read_unlock();
1374 }
24ac23ab 1375 /* Update sequence id. */
9f958ab8 1376 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1377 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1378 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1379 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1380 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1381 }
26e976a8 1382 data->timestamp = jiffies;
035168ab 1383 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1384 &data->o_arg.seq_args,
1385 &data->o_res.seq_res, 1, task))
1386 return;
5138fde0 1387 rpc_call_start(task);
6ee41268
TM		 1388 return;
1389out_no_action:
1390 task->tk_action = NULL;
1391
24ac23ab 1392}
1da177e4 1393
b257957e
AB		 1394static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1395{
1396 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1397 nfs4_open_prepare(task, calldata);
1398}
1399
24ac23ab
TM		 1400static void nfs4_open_done(struct rpc_task *task, void *calldata)
1401{
1402 struct nfs4_opendata *data = calldata;
1da177e4 1403
24ac23ab 1404 data->rpc_status = task->tk_status;
d898528c 1405
14516c3a
TM		 1406 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1407 return;
d898528c 1408
24ac23ab
TM		 1409 if (task->tk_status == 0) {
1410 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1411 case S_IFREG:
1412 break;
1413 case S_IFLNK:
24ac23ab 1414 data->rpc_status = -ELOOP;
6f926b5b
TM		 1415 break;
1416 case S_IFDIR:
24ac23ab 1417 data->rpc_status = -EISDIR;
6f926b5b
TM		 1418 break;
1419 default:
24ac23ab 1420 data->rpc_status = -ENOTDIR;
6f926b5b 1421 }
26e976a8 1422 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1423 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1424 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1425 }
3e309914 1426 data->rpc_done = 1;
24ac23ab 1427}
6f926b5b 1428
24ac23ab
TM		 1429static void nfs4_open_release(void *calldata)
1430{
1431 struct nfs4_opendata *data = calldata;
1432 struct nfs4_state *state = NULL;
1433
1434 /* If this request hasn't been cancelled, do nothing */
1435 if (data->cancelled == 0)
1436 goto out_free;
1437 /* In case of error, no cleanup! */
3e309914 1438 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1439 goto out_free;
1440 /* In case we need an open_confirm, no cleanup! */
1441 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1442 goto out_free;
24ac23ab 1443 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1444 if (!IS_ERR(state))
dc0b027d 1445 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1446out_free:
c6d00e63 1447 nfs4_opendata_put(data);
24ac23ab
TM		 1448}
1449
1450static const struct rpc_call_ops nfs4_open_ops = {
1451 .rpc_call_prepare = nfs4_open_prepare,
1452 .rpc_call_done = nfs4_open_done,
1453 .rpc_release = nfs4_open_release,
1454};
1455
b257957e
AB		 1456static const struct rpc_call_ops nfs4_recover_open_ops = {
1457 .rpc_call_prepare = nfs4_recover_open_prepare,
1458 .rpc_call_done = nfs4_open_done,
1459 .rpc_release = nfs4_open_release,
1460};
1461
1462static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1463{
1464 struct inode *dir = data->dir->d_inode;
1465 struct nfs_server *server = NFS_SERVER(dir);
1466 struct nfs_openargs *o_arg = &data->o_arg;
1467 struct nfs_openres *o_res = &data->o_res;
1468 struct rpc_task *task;
5138fde0
TM		 1469 struct rpc_message msg = {
1470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1471 .rpc_argp = o_arg,
1472 .rpc_resp = o_res,
1473 .rpc_cred = data->owner->so_cred,
1474 };
c970aa85
TM		 1475 struct rpc_task_setup task_setup_data = {
1476 .rpc_client = server->client,
5138fde0 1477 .rpc_message = &msg,
c970aa85
TM		 1478 .callback_ops = &nfs4_open_ops,
1479 .callback_data = data,
101070ca 1480 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1481 .flags = RPC_TASK_ASYNC,
1482 };
24ac23ab
TM		 1483 int status;
1484
c6d00e63 1485 kref_get(&data->kref);
3e309914
TM		 1486 data->rpc_done = 0;
1487 data->rpc_status = 0;
2ced46c2 1488 data->cancelled = 0;
b257957e
AB		 1489 if (isrecover)
1490 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1491 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1492 if (IS_ERR(task))
1493 return PTR_ERR(task);
1494 status = nfs4_wait_for_completion_rpc_task(task);
1495 if (status != 0) {
1496 data->cancelled = 1;
1497 smp_wmb();
1498 } else
1499 status = data->rpc_status;
1500 rpc_put_task(task);
1501
1502 return status;
1503}
1504
1505static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1506{
1507 struct inode *dir = data->dir->d_inode;
1508 struct nfs_openres *o_res = &data->o_res;
1509 int status;
1510
1511 status = nfs4_run_open_task(data, 1);
1512 if (status != 0 || !data->rpc_done)
1513 return status;
1514
1515 nfs_refresh_inode(dir, o_res->dir_attr);
1516
1517 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1518 status = _nfs4_proc_open_confirm(data);
1519 if (status != 0)
1520 return status;
1521 }
1522
1523 return status;
1524}
1525
1526/*
1527 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1528 */
1529static int _nfs4_proc_open(struct nfs4_opendata *data)
1530{
1531 struct inode *dir = data->dir->d_inode;
1532 struct nfs_server *server = NFS_SERVER(dir);
1533 struct nfs_openargs *o_arg = &data->o_arg;
1534 struct nfs_openres *o_res = &data->o_res;
1535 int status;
1536
1537 status = nfs4_run_open_task(data, 0);
3e309914 1538 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1539 return status;
1540
56ae19f3
TM		 1541 if (o_arg->open_flags & O_CREAT) {
1542 update_changeattr(dir, &o_res->cinfo);
1543 nfs_post_op_update_inode(dir, o_res->dir_attr);
1544 } else
1545 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1546 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1547 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1548 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1549 status = _nfs4_proc_open_confirm(data);
1da177e4 1550 if (status != 0)
24ac23ab 1551 return status;
1da177e4
LT		 1552 }
1553 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1554 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1555 return 0;
1da177e4
LT		 1556}
1557
10afec90 1558static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1559{
7539bbab 1560 struct nfs_client *clp = server->nfs_client;
a78cb57a 1561 unsigned int loop;
6b30954e 1562 int ret;
58d9714a 1563
a78cb57a 1564 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1565 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1566 if (ret != 0)
a78cb57a 1567 break;
e598d843
TM		 1568 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1569 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1570 break;
58d9714a 1571 nfs4_schedule_state_recovery(clp);
a78cb57a 1572 ret = -EIO;
6b30954e 1573 }
a78cb57a 1574 return ret;
58d9714a
TM		 1575}
1576
1da177e4
LT		 1577/*
1578 * OPEN_EXPIRED:
1579 * reclaim state on the server after a network partition.
1580 * Assumes caller holds the appropriate lock
1581 */
539cd03a 1582static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1583{
e56e0b78 1584 struct nfs4_opendata *opendata;
864472e9 1585 int ret;
1da177e4 1586
6f220ed5
TM		 1587 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1588 if (IS_ERR(opendata))
1589 return PTR_ERR(opendata);
864472e9 1590 ret = nfs4_open_recover(opendata, state);
35d05778 1591 if (ret == -ESTALE)
539cd03a 1592 d_drop(ctx->path.dentry);
c6d00e63 1593 nfs4_opendata_put(opendata);
864472e9 1594 return ret;
1da177e4
LT		 1595}
1596
a9ed2e25 1597static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1598{
539cd03a 1599 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1600 struct nfs4_exception exception = { };
1601 int err;
1602
1603 do {
539cd03a 1604 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1605 switch (err) {
1606 default:
1607 goto out;
1608 case -NFS4ERR_GRACE:
1609 case -NFS4ERR_DELAY:
2c643488 1610 case -EKEYEXPIRED:
a9ed2e25
TM		 1611 nfs4_handle_exception(server, err, &exception);
1612 err = 0;
1613 }
202b50dc 1614 } while (exception.retry);
a9ed2e25 1615out:
202b50dc
TM		 1616 return err;
1617}
1618
1da177e4
LT		 1619static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1620{
1da177e4 1621 struct nfs_open_context *ctx;
864472e9 1622 int ret;
1da177e4 1623
864472e9
TM		 1624 ctx = nfs4_state_find_open_context(state);
1625 if (IS_ERR(ctx))
1626 return PTR_ERR(ctx);
539cd03a 1627 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1628 put_nfs_open_context(ctx);
1629 return ret;
1da177e4
LT		 1630}
1631
aa53ed54
JL		 1632/*
1633 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1634 * fields corresponding to attributes that were used to store the verifier.
1635 * Make sure we clobber those fields in the later setattr call
1636 */
1637static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1638{
1639 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1640 !(sattr->ia_valid & ATTR_ATIME_SET))
1641 sattr->ia_valid |= ATTR_ATIME;
1642
1643 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1644 !(sattr->ia_valid & ATTR_MTIME_SET))
1645 sattr->ia_valid |= ATTR_MTIME;
1646}
1647
1da177e4 1648/*
24ac23ab 1649 * Returns a referenced nfs4_state
1da177e4 1650 */
dc0b027d 1651static 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		 1652{
1653 struct nfs4_state_owner *sp;
1654 struct nfs4_state *state = NULL;
1655 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1656 struct nfs4_opendata *opendata;
aac00a8d 1657 int status;
1da177e4
LT		 1658
1659 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1660 status = -ENOMEM;
1661 if (!(sp = nfs4_get_state_owner(server, cred))) {
1662 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1663 goto out_err;
1664 }
58d9714a
TM		 1665 status = nfs4_recover_expired_lease(server);
1666 if (status != 0)
b4454fe1 1667 goto err_put_state_owner;
aac00a8d 1668 if (path->dentry->d_inode != NULL)
dc0b027d 1669 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1670 status = -ENOMEM;
8535b2be 1671 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1672 if (opendata == NULL)
95d35cb4 1673 goto err_put_state_owner;
1da177e4 1674
aac00a8d
TM		 1675 if (path->dentry->d_inode != NULL)
1676 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1677
24ac23ab 1678 status = _nfs4_proc_open(opendata);
1da177e4 1679 if (status != 0)
c6d00e63 1680 goto err_opendata_put;
1da177e4 1681
24ac23ab 1682 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1683 status = PTR_ERR(state);
1684 if (IS_ERR(state))
c6d00e63 1685 goto err_opendata_put;
0df5dd4a 1686 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1687 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1688
1689 if (opendata->o_arg.open_flags & O_EXCL) {
1690 nfs4_exclusive_attrset(opendata, sattr);
1691
1692 nfs_fattr_init(opendata->o_res.f_attr);
1693 status = nfs4_do_setattr(state->inode, cred,
1694 opendata->o_res.f_attr, sattr,
1695 state);
1696 if (status == 0)
1697 nfs_setattr_update_inode(state->inode, sattr);
1698 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1699 }
c6d00e63 1700 nfs4_opendata_put(opendata);
1da177e4 1701 nfs4_put_state_owner(sp);
1da177e4
LT		 1702 *res = state;
1703 return 0;
c6d00e63
TM		 1704err_opendata_put:
1705 nfs4_opendata_put(opendata);
e56e0b78
TM		 1706err_put_state_owner:
1707 nfs4_put_state_owner(sp);
1da177e4 1708out_err:
1da177e4
LT		 1709 *res = NULL;
1710 return status;
1711}
1712
1713
dc0b027d 1714static 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		 1715{
1716 struct nfs4_exception exception = { };
1717 struct nfs4_state *res;
1718 int status;
1719
1720 do {
dc0b027d 1721 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1722 if (status == 0)
1723 break;
1724 /* NOTE: BAD_SEQID means the server and client disagree about the
1725 * book-keeping w.r.t. state-changing operations
1726 * (OPEN/CLOSE/LOCK/LOCKU...)
1727 * It is actually a sign of a bug on the client or on the server.
1728 *
1729 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1730 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1731 * have unhashed the old state_owner for us, and that we can
1732 * therefore safely retry using a new one. We should still warn
1733 * the user though...
1734 */
1735 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1736 printk(KERN_WARNING "NFS: v4 server %s "
1737 " returned a bad sequence-id error!\n",
1738 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1739 exception.retry = 1;
1740 continue;
1741 }
550f5747
TM		 1742 /*
1743 * BAD_STATEID on OPEN means that the server cancelled our
1744 * state before it received the OPEN_CONFIRM.
1745 * Recover by retrying the request as per the discussion
1746 * on Page 181 of RFC3530.
1747 */
1748 if (status == -NFS4ERR_BAD_STATEID) {
1749 exception.retry = 1;
1750 continue;
1751 }
aac00a8d
TM		 1752 if (status == -EAGAIN) {
1753 /* We must have found a delegation */
1754 exception.retry = 1;
1755 continue;
1756 }
1da177e4
LT		 1757 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1758 status, &exception));
1759 } while (exception.retry);
1760 return res;
1761}
1762
659bfcd6
TM		 1763static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1764 struct nfs_fattr *fattr, struct iattr *sattr,
1765 struct nfs4_state *state)
1da177e4 1766{
3e4f6290 1767 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1768 struct nfs_setattrargs arg = {
3e4f6290 1769 .fh = NFS_FH(inode),
1da177e4
LT		 1770 .iap = sattr,
1771 .server = server,
1772 .bitmask = server->attr_bitmask,
1773 };
1774 struct nfs_setattrres res = {
1775 .fattr = fattr,
1776 .server = server,
1777 };
1778 struct rpc_message msg = {
659bfcd6
TM		 1779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1780 .rpc_argp = &arg,
1781 .rpc_resp = &res,
1782 .rpc_cred = cred,
1da177e4 1783 };
26e976a8 1784 unsigned long timestamp = jiffies;
65e4308d 1785 int status;
1da177e4 1786
0e574af1 1787 nfs_fattr_init(fattr);
1da177e4 1788
3e4f6290
TM		 1789 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1790 /* Use that stateid */
1791 } else if (state != NULL) {
77041ed9 1792 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1793 } else
1da177e4
LT		 1794 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1795
cccef3b9 1796 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1797 if (status == 0 && state != NULL)
1798 renew_lease(server, timestamp);
65e4308d 1799 return status;
1da177e4
LT		 1800}
1801
659bfcd6
TM		 1802static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1803 struct nfs_fattr *fattr, struct iattr *sattr,
1804 struct nfs4_state *state)
1da177e4 1805{
3e4f6290 1806 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1807 struct nfs4_exception exception = { };
1808 int err;
1809 do {
1810 err = nfs4_handle_exception(server,
659bfcd6 1811 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1812 &exception);
1813 } while (exception.retry);
1814 return err;
1815}
1816
1817struct nfs4_closedata {
4a35bd41 1818 struct path path;
1da177e4
LT		 1819 struct inode *inode;
1820 struct nfs4_state *state;
1821 struct nfs_closeargs arg;
1822 struct nfs_closeres res;
516a6af6 1823 struct nfs_fattr fattr;
26e976a8 1824 unsigned long timestamp;
1da177e4
LT		 1825};
1826
963d8fe5 1827static void nfs4_free_closedata(void *data)
9512135d 1828{
963d8fe5
TM		 1829 struct nfs4_closedata *calldata = data;
1830 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1831
1832 nfs4_put_open_state(calldata->state);
1833 nfs_free_seqid(calldata->arg.seqid);
9512135d 1834 nfs4_put_state_owner(sp);
31f31db1 1835 path_put(&calldata->path);
9512135d
TM		 1836 kfree(calldata);
1837}
1838
88069f77
TM		 1839static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1840 fmode_t fmode)
1841{
1842 spin_lock(&state->owner->so_lock);
1843 if (!(fmode & FMODE_READ))
1844 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1845 if (!(fmode & FMODE_WRITE))
1846 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1847 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1848 spin_unlock(&state->owner->so_lock);
1849}
1850
963d8fe5 1851static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1852{
963d8fe5 1853 struct nfs4_closedata *calldata = data;
1da177e4 1854 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1855 struct nfs_server *server = NFS_SERVER(calldata->inode);
1856
14516c3a
TM		 1857 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1858 return;
1da177e4
LT		 1859 /* hmm. we are done with the inode, and in the process of freeing
1860 * the state_owner. we keep this around to process errors
1861 */
1da177e4
LT		 1862 switch (task->tk_status) {
1863 case 0:
45328c35 1864 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1865 renew_lease(server, calldata->timestamp);
88069f77
TM		 1866 nfs4_close_clear_stateid_flags(state,
1867 calldata->arg.fmode);
1da177e4
LT		 1868 break;
1869 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1870 case -NFS4ERR_OLD_STATEID:
1871 case -NFS4ERR_BAD_STATEID:
1da177e4 1872 case -NFS4ERR_EXPIRED:
dc0b027d 1873 if (calldata->arg.fmode == 0)
9e33bed5 1874 break;
1da177e4 1875 default:
72211dbe
TM		 1876 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1877 rpc_restart_call_prepare(task);
1da177e4 1878 }
72211dbe 1879 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1880 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1881}
1882
4ce70ada 1883static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1884{
4ce70ada 1885 struct nfs4_closedata *calldata = data;
9512135d 1886 struct nfs4_state *state = calldata->state;
88069f77 1887 int call_close = 0;
9512135d 1888
963d8fe5 1889 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1890 return;
003707c7 1891
88069f77
TM		 1892 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1893 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1894 spin_lock(&state->owner->so_lock);
003707c7 1895 /* Calculate the change in open mode */
e7616923 1896 if (state->n_rdwr == 0) {
003707c7 1897 if (state->n_rdonly == 0) {
88069f77
TM		 1898 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1899 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1900 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1901 }
1902 if (state->n_wronly == 0) {
88069f77
TM		 1903 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1904 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1905 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1906 }
e7616923 1907 }
4cecb76f 1908 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1909
1910 if (!call_close) {
963d8fe5
TM		 1911 /* Note: exit _without_ calling nfs4_close_done */
1912 task->tk_action = NULL;
9512135d
TM		 1913 return;
1914 }
88069f77
TM		 1915
1916 if (calldata->arg.fmode == 0)
1917 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1918
516a6af6 1919 nfs_fattr_init(calldata->res.fattr);
26e976a8 1920 calldata->timestamp = jiffies;
035168ab 1921 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1922 &calldata->arg.seq_args, &calldata->res.seq_res,
1923 1, task))
1924 return;
5138fde0 1925 rpc_call_start(task);
1da177e4
LT		 1926}
1927
963d8fe5 1928static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1929 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1930 .rpc_call_done = nfs4_close_done,
1931 .rpc_release = nfs4_free_closedata,
1932};
1933
1da177e4
LT		 1934/*
1935 * It is possible for data to be read/written from a mem-mapped file
1936 * after the sys_close call (which hits the vfs layer as a flush).
1937 * This means that we can't safely call nfsv4 close on a file until
1938 * the inode is cleared. This in turn means that we are not good
1939 * NFSv4 citizens - we do not indicate to the server to update the file's
1940 * share state even when we are done with one of the three share
1941 * stateid's in the inode.
1942 *
1943 * NOTE: Caller must be holding the sp->so_owner semaphore!
1944 */
8535b2be 1945int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 1946{
4a35bd41 1947 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1948 struct nfs4_closedata *calldata;
b39e625b
TM		 1949 struct nfs4_state_owner *sp = state->owner;
1950 struct rpc_task *task;
5138fde0
TM		 1951 struct rpc_message msg = {
1952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1953 .rpc_cred = state->owner->so_cred,
1954 };
c970aa85
TM		 1955 struct rpc_task_setup task_setup_data = {
1956 .rpc_client = server->client,
5138fde0 1957 .rpc_message = &msg,
c970aa85 1958 .callback_ops = &nfs4_close_ops,
101070ca 1959 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1960 .flags = RPC_TASK_ASYNC,
1961 };
9512135d 1962 int status = -ENOMEM;
1da177e4 1963
8535b2be 1964 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 1965 if (calldata == NULL)
9512135d 1966 goto out;
4a35bd41 1967 calldata->inode = state->inode;
1da177e4 1968 calldata->state = state;
4a35bd41 1969 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1970 calldata->arg.stateid = &state->open_stateid;
1da177e4 1971 /* Serialization for the sequence id */
8535b2be 1972 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 1973 if (calldata->arg.seqid == NULL)
1974 goto out_free_calldata;
dc0b027d 1975 calldata->arg.fmode = 0;
a65318bf 1976 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1977 calldata->res.fattr = &calldata->fattr;
c1d51931 1978 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1979 calldata->res.server = server;
5f7dbd5c 1980 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
f6948697
AV		 1981 path_get(path);
1982 calldata->path = *path;
9512135d 1983
5138fde0
TM		 1984 msg.rpc_argp = &calldata->arg,
1985 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1986 task_setup_data.callback_data = calldata;
1987 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1988 if (IS_ERR(task))
1989 return PTR_ERR(task);
a49c3c77
TM		 1990 status = 0;
1991 if (wait)
1992 status = rpc_wait_for_completion_task(task);
b39e625b 1993 rpc_put_task(task);
a49c3c77 1994 return status;
9512135d
TM		 1995out_free_calldata:
1996 kfree(calldata);
1997out:
b39e625b
TM		 1998 nfs4_put_open_state(state);
1999 nfs4_put_state_owner(sp);
9512135d 2000 return status;
1da177e4
LT		 2001}
2002
dc0b027d 2003static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 2004{
2005 struct file *filp;
1b45c46c 2006 int ret;
02a913a7 2007
1b45c46c 2008 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 2009 if (fmode & FMODE_EXEC) {
af22f94a 2010 ret = nfs_may_open(state->inode,
1b45c46c
TM		 2011 state->owner->so_cred,
2012 nd->intent.open.flags);
2013 if (ret < 0)
2014 goto out_close;
2015 }
4a35bd41 2016 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 2017 if (!IS_ERR(filp)) {
2018 struct nfs_open_context *ctx;
cd3758e3 2019 ctx = nfs_file_open_context(filp);
02a913a7 2020 ctx->state = state;
95cf959b
TM		 2021 return 0;
2022 }
1b45c46c
TM		 2023 ret = PTR_ERR(filp);
2024out_close:
dc0b027d 2025 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 2026 return ret;
02a913a7
TM		 2027}
2028
2029struct dentry *
1da177e4
LT		 2030nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
2031{
ad389da7 2032 struct path path = {
4ac91378 2033 .mnt = nd->path.mnt,
ad389da7
TM		 2034 .dentry = dentry,
2035 };
4ac91378 2036 struct dentry *parent;
1da177e4
LT		 2037 struct iattr attr;
2038 struct rpc_cred *cred;
2039 struct nfs4_state *state;
02a913a7 2040 struct dentry *res;
dc0b027d 2041 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2042
2043 if (nd->flags & LOOKUP_CREATE) {
2044 attr.ia_mode = nd->intent.open.create_mode;
2045 attr.ia_valid = ATTR_MODE;
2046 if (!IS_POSIXACL(dir))
ce3b0f8d 2047 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2048 } else {
2049 attr.ia_valid = 0;
2050 BUG_ON(nd->intent.open.flags & O_CREAT);
2051 }
2052
98a8e323 2053 cred = rpc_lookup_cred();
1da177e4 2054 if (IS_ERR(cred))
02a913a7 2055 return (struct dentry *)cred;
565277f6
TM		 2056 parent = dentry->d_parent;
2057 /* Protect against concurrent sillydeletes */
2058 nfs_block_sillyrename(parent);
dc0b027d 2059 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2060 put_rpccred(cred);
02a913a7 2061 if (IS_ERR(state)) {
d75340cc 2062 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2063 d_add(dentry, NULL);
d75340cc
TM		 2064 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2065 }
565277f6 2066 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2067 return (struct dentry *)state;
2068 }
24ac23ab 2069 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2070 if (res != NULL)
deee9369 2071 path.dentry = res;
d75340cc 2072 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2073 nfs_unblock_sillyrename(parent);
dc0b027d 2074 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2075 return res;
1da177e4
LT		 2076}
2077
2078int
02a913a7 2079nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2080{
ad389da7 2081 struct path path = {
4ac91378 2082 .mnt = nd->path.mnt,
ad389da7
TM		 2083 .dentry = dentry,
2084 };
1da177e4
LT		 2085 struct rpc_cred *cred;
2086 struct nfs4_state *state;
dc0b027d 2087 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2088
98a8e323 2089 cred = rpc_lookup_cred();
1da177e4
LT		 2090 if (IS_ERR(cred))
2091 return PTR_ERR(cred);
dc0b027d 2092 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2093 put_rpccred(cred);
02a913a7
TM		 2094 if (IS_ERR(state)) {
2095 switch (PTR_ERR(state)) {
2096 case -EPERM:
2097 case -EACCES:
2098 case -EDQUOT:
2099 case -ENOSPC:
2100 case -EROFS:
04287f97 2101 return PTR_ERR(state);
b87c0adf
CL		 2102 default:
2103 goto out_drop;
02a913a7 2104 }
02a913a7 2105 }
24ac23ab 2106 if (state->inode == dentry->d_inode) {
d75340cc 2107 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2108 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2109 return 1;
2110 }
dc0b027d 2111 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2112out_drop:
2113 d_drop(dentry);
1da177e4
LT		 2114 return 0;
2115}
2116
1185a552 2117static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2118{
2119 if (ctx->state == NULL)
2120 return;
2121 if (is_sync)
2122 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2123 else
2124 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2125}
1da177e4
LT		 2126
2127static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2128{
43652ad5
BH		 2129 struct nfs4_server_caps_arg args = {
2130 .fhandle = fhandle,
2131 };
1da177e4
LT		 2132 struct nfs4_server_caps_res res = {};
2133 struct rpc_message msg = {
2134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2135 .rpc_argp = &args,
1da177e4
LT		 2136 .rpc_resp = &res,
2137 };
2138 int status;
2139
cccef3b9 2140 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2141 if (status == 0) {
2142 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2143 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2144 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2145 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2146 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2147 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2148 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2149 server->caps |= NFS_CAP_ACLS;
2150 if (res.has_links != 0)
2151 server->caps |= NFS_CAP_HARDLINKS;
2152 if (res.has_symlinks != 0)
2153 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2154 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2155 server->caps |= NFS_CAP_FILEID;
2156 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2157 server->caps |= NFS_CAP_MODE;
2158 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2159 server->caps |= NFS_CAP_NLINK;
2160 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2161 server->caps |= NFS_CAP_OWNER;
2162 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2163 server->caps |= NFS_CAP_OWNER_GROUP;
2164 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2165 server->caps |= NFS_CAP_ATIME;
2166 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2167 server->caps |= NFS_CAP_CTIME;
2168 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2169 server->caps |= NFS_CAP_MTIME;
2170
a65318bf
TM		 2171 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2172 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2173 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2174 server->acl_bitmask = res.acl_bitmask;
2175 }
cccef3b9 2176
1da177e4
LT		 2177 return status;
2178}
2179
55a97593 2180int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2181{
2182 struct nfs4_exception exception = { };
2183 int err;
2184 do {
2185 err = nfs4_handle_exception(server,
2186 _nfs4_server_capabilities(server, fhandle),
2187 &exception);
2188 } while (exception.retry);
2189 return err;
2190}
2191
2192static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2193 struct nfs_fsinfo *info)
2194{
1da177e4
LT		 2195 struct nfs4_lookup_root_arg args = {
2196 .bitmask = nfs4_fattr_bitmap,
2197 };
2198 struct nfs4_lookup_res res = {
2199 .server = server,
0e574af1 2200 .fattr = info->fattr,
1da177e4
LT		 2201 .fh = fhandle,
2202 };
2203 struct rpc_message msg = {
2204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2205 .rpc_argp = &args,
2206 .rpc_resp = &res,
2207 };
008f55d0 2208
0e574af1 2209 nfs_fattr_init(info->fattr);
fccba804 2210 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2211}
2212
2213static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2214 struct nfs_fsinfo *info)
2215{
2216 struct nfs4_exception exception = { };
2217 int err;
2218 do {
2219 err = nfs4_handle_exception(server,
2220 _nfs4_lookup_root(server, fhandle, info),
2221 &exception);
2222 } while (exception.retry);
2223 return err;
2224}
2225
54ceac45
DH		 2226/*
2227 * get the file handle for the "/" directory on the server
2228 */
1da177e4 2229static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2230 struct nfs_fsinfo *info)
1da177e4 2231{
1da177e4
LT		 2232 int status;
2233
1da177e4 2234 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2235 if (status == 0)
2236 status = nfs4_server_capabilities(server, fhandle);
2237 if (status == 0)
2238 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2239 return nfs4_map_errors(status);
1da177e4
LT		 2240}
2241
6b97fd3d
MN		 2242/*
2243 * Get locations and (maybe) other attributes of a referral.
2244 * Note that we'll actually follow the referral later when
2245 * we detect fsid mismatch in inode revalidation
2246 */
56659e99 2247static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2248{
2249 int status = -ENOMEM;
2250 struct page *page = NULL;
2251 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2252
2253 page = alloc_page(GFP_KERNEL);
2254 if (page == NULL)
2255 goto out;
2256 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2257 if (locations == NULL)
2258 goto out;
2259
c228fd3a 2260 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2261 if (status != 0)
2262 goto out;
2263 /* Make sure server returned a different fsid for the referral */
2264 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2265 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2266 status = -EIO;
2267 goto out;
2268 }
2269
2270 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2271 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2272 if (!fattr->mode)
2273 fattr->mode = S_IFDIR;
2274 memset(fhandle, 0, sizeof(struct nfs_fh));
2275out:
2276 if (page)
2277 __free_page(page);
2278 if (locations)
2279 kfree(locations);
2280 return status;
2281}
2282
1da177e4
LT		 2283static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2284{
2285 struct nfs4_getattr_arg args = {
2286 .fh = fhandle,
2287 .bitmask = server->attr_bitmask,
2288 };
2289 struct nfs4_getattr_res res = {
2290 .fattr = fattr,
2291 .server = server,
2292 };
2293 struct rpc_message msg = {
2294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2295 .rpc_argp = &args,
2296 .rpc_resp = &res,
2297 };
2298
0e574af1 2299 nfs_fattr_init(fattr);
cccef3b9 2300 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2301}
2302
2303static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2304{
2305 struct nfs4_exception exception = { };
2306 int err;
2307 do {
2308 err = nfs4_handle_exception(server,
2309 _nfs4_proc_getattr(server, fhandle, fattr),
2310 &exception);
2311 } while (exception.retry);
2312 return err;
2313}
2314
2315/*
2316 * The file is not closed if it is opened due to the a request to change
2317 * the size of the file. The open call will not be needed once the
2318 * VFS layer lookup-intents are implemented.
2319 *
2320 * Close is called when the inode is destroyed.
2321 * If we haven't opened the file for O_WRONLY, we
2322 * need to in the size_change case to obtain a stateid.
2323 *
2324 * Got race?
2325 * Because OPEN is always done by name in nfsv4, it is
2326 * possible that we opened a different file by the same
2327 * name. We can recognize this race condition, but we
2328 * can't do anything about it besides returning an error.
2329 *
2330 * This will be fixed with VFS changes (lookup-intent).
2331 */
2332static int
2333nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2334 struct iattr *sattr)
2335{
08e9eac4 2336 struct inode *inode = dentry->d_inode;
659bfcd6 2337 struct rpc_cred *cred = NULL;
d530838b 2338 struct nfs4_state *state = NULL;
1da177e4
LT		 2339 int status;
2340
0e574af1 2341 nfs_fattr_init(fattr);
1da177e4 2342
d530838b 2343 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2344 if (sattr->ia_valid & ATTR_FILE) {
2345 struct nfs_open_context *ctx;
2346
2347 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2348 if (ctx) {
2349 cred = ctx->cred;
2350 state = ctx->state;
2351 }
659bfcd6 2352 }
08e9eac4 2353
659bfcd6 2354 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2355 if (status == 0)
2356 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2357 return status;
2358}
2359
56659e99
TM		 2360static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2361 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2362 struct nfs_fattr *fattr)
2363{
2364 int status;
2365 struct nfs4_lookup_arg args = {
2366 .bitmask = server->attr_bitmask,
2367 .dir_fh = dirfh,
2368 .name = name,
2369 };
2370 struct nfs4_lookup_res res = {
2371 .server = server,
2372 .fattr = fattr,
2373 .fh = fhandle,
2374 };
2375 struct rpc_message msg = {
2376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2377 .rpc_argp = &args,
2378 .rpc_resp = &res,
2379 };
2380
2381 nfs_fattr_init(fattr);
2382
2383 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2384 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2385 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2386 return status;
2387}
2388
2389static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2390 struct qstr *name, struct nfs_fh *fhandle,
2391 struct nfs_fattr *fattr)
2392{
2393 struct nfs4_exception exception = { };
2394 int err;
2395 do {
4e56e082
TM		 2396 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2397 /* FIXME: !!!! */
2398 if (err == -NFS4ERR_MOVED) {
2399 err = -EREMOTE;
2400 break;
2401 }
2402 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2403 } while (exception.retry);
2404 return err;
2405}
2406
56659e99 2407static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2408 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2409{
4e56e082 2410 int status;
1da177e4
LT		 2411
2412 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2413 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2414 if (status == -NFS4ERR_MOVED)
2415 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2416 dprintk("NFS reply lookup: %d\n", status);
2417 return status;
2418}
2419
2420static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2421{
2422 struct nfs4_exception exception = { };
2423 int err;
2424 do {
2425 err = nfs4_handle_exception(NFS_SERVER(dir),
2426 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2427 &exception);
2428 } while (exception.retry);
2429 return err;
2430}
2431
2432static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2433{
76b32999 2434 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2435 struct nfs4_accessargs args = {
2436 .fh = NFS_FH(inode),
76b32999
TM		 2437 .bitmask = server->attr_bitmask,
2438 };
2439 struct nfs4_accessres res = {
2440 .server = server,
1da177e4 2441 };
1da177e4
LT		 2442 struct rpc_message msg = {
2443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2444 .rpc_argp = &args,
2445 .rpc_resp = &res,
2446 .rpc_cred = entry->cred,
2447 };
2448 int mode = entry->mask;
2449 int status;
2450
2451 /*
2452 * Determine which access bits we want to ask for...
2453 */
2454 if (mode & MAY_READ)
2455 args.access |= NFS4_ACCESS_READ;
2456 if (S_ISDIR(inode->i_mode)) {
2457 if (mode & MAY_WRITE)
2458 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2459 if (mode & MAY_EXEC)
2460 args.access |= NFS4_ACCESS_LOOKUP;
2461 } else {
2462 if (mode & MAY_WRITE)
2463 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2464 if (mode & MAY_EXEC)
2465 args.access |= NFS4_ACCESS_EXECUTE;
2466 }
c407d41a
TM		 2467
2468 res.fattr = nfs_alloc_fattr();
2469 if (res.fattr == NULL)
2470 return -ENOMEM;
2471
cccef3b9 2472 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2473 if (!status) {
2474 entry->mask = 0;
2475 if (res.access & NFS4_ACCESS_READ)
2476 entry->mask |= MAY_READ;
2477 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2478 entry->mask |= MAY_WRITE;
2479 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2480 entry->mask |= MAY_EXEC;
c407d41a 2481 nfs_refresh_inode(inode, res.fattr);
1da177e4 2482 }
c407d41a 2483 nfs_free_fattr(res.fattr);
1da177e4
LT		 2484 return status;
2485}
2486
2487static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2488{
2489 struct nfs4_exception exception = { };
2490 int err;
2491 do {
2492 err = nfs4_handle_exception(NFS_SERVER(inode),
2493 _nfs4_proc_access(inode, entry),
2494 &exception);
2495 } while (exception.retry);
2496 return err;
2497}
2498
2499/*
2500 * TODO: For the time being, we don't try to get any attributes
2501 * along with any of the zero-copy operations READ, READDIR,
2502 * READLINK, WRITE.
2503 *
2504 * In the case of the first three, we want to put the GETATTR
2505 * after the read-type operation -- this is because it is hard
2506 * to predict the length of a GETATTR response in v4, and thus
2507 * align the READ data correctly. This means that the GETATTR
2508 * may end up partially falling into the page cache, and we should
2509 * shift it into the 'tail' of the xdr_buf before processing.
2510 * To do this efficiently, we need to know the total length
2511 * of data received, which doesn't seem to be available outside
2512 * of the RPC layer.
2513 *
2514 * In the case of WRITE, we also want to put the GETATTR after
2515 * the operation -- in this case because we want to make sure
2516 * we get the post-operation mtime and size. This means that
2517 * we can't use xdr_encode_pages() as written: we need a variant
2518 * of it which would leave room in the 'tail' iovec.
2519 *
2520 * Both of these changes to the XDR layer would in fact be quite
2521 * minor, but I decided to leave them for a subsequent patch.
2522 */
2523static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2524 unsigned int pgbase, unsigned int pglen)
2525{
2526 struct nfs4_readlink args = {
2527 .fh = NFS_FH(inode),
2528 .pgbase = pgbase,
2529 .pglen = pglen,
2530 .pages = &page,
2531 };
f50c7000 2532 struct nfs4_readlink_res res;
1da177e4
LT		 2533 struct rpc_message msg = {
2534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2535 .rpc_argp = &args,
f50c7000 2536 .rpc_resp = &res,
1da177e4
LT		 2537 };
2538
cccef3b9 2539 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2540}
2541
2542static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2543 unsigned int pgbase, unsigned int pglen)
2544{
2545 struct nfs4_exception exception = { };
2546 int err;
2547 do {
2548 err = nfs4_handle_exception(NFS_SERVER(inode),
2549 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2550 &exception);
2551 } while (exception.retry);
2552 return err;
2553}
2554
1da177e4
LT		 2555/*
2556 * Got race?
2557 * We will need to arrange for the VFS layer to provide an atomic open.
2558 * Until then, this create/open method is prone to inefficiency and race
2559 * conditions due to the lookup, create, and open VFS calls from sys_open()
2560 * placed on the wire.
2561 *
2562 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2563 * The file will be opened again in the subsequent VFS open call
2564 * (nfs4_proc_file_open).
2565 *
2566 * The open for read will just hang around to be used by any process that
2567 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2568 */
2569
2570static int
2571nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2572 int flags, struct nameidata *nd)
1da177e4 2573{
ad389da7 2574 struct path path = {
4ac91378 2575 .mnt = nd->path.mnt,
ad389da7
TM		 2576 .dentry = dentry,
2577 };
1da177e4
LT		 2578 struct nfs4_state *state;
2579 struct rpc_cred *cred;
dc0b027d 2580 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2581 int status = 0;
2582
98a8e323 2583 cred = rpc_lookup_cred();
1da177e4
LT		 2584 if (IS_ERR(cred)) {
2585 status = PTR_ERR(cred);
2586 goto out;
2587 }
dc0b027d 2588 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2589 d_drop(dentry);
1da177e4
LT		 2590 if (IS_ERR(state)) {
2591 status = PTR_ERR(state);
659bfcd6 2592 goto out_putcred;
1da177e4 2593 }
d4d9cdcb 2594 d_add(dentry, igrab(state->inode));
d75340cc 2595 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
ad389da7 2596 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2597 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2598 else
dc0b027d 2599 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2600out_putcred:
2601 put_rpccred(cred);
1da177e4
LT		 2602out:
2603 return status;
2604}
2605
2606static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2607{
16e42959 2608 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2609 struct nfs_removeargs args = {
1da177e4 2610 .fh = NFS_FH(dir),
4fdc17b2
TM		 2611 .name.len = name->len,
2612 .name.name = name->name,
16e42959
TM		 2613 .bitmask = server->attr_bitmask,
2614 };
4fdc17b2 2615 struct nfs_removeres res = {
16e42959 2616 .server = server,
1da177e4 2617 };
1da177e4 2618 struct rpc_message msg = {
4fdc17b2
TM		 2619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2620 .rpc_argp = &args,
2621 .rpc_resp = &res,
1da177e4 2622 };
d346890b
TM		 2623 int status = -ENOMEM;
2624
2625 res.dir_attr = nfs_alloc_fattr();
2626 if (res.dir_attr == NULL)
2627 goto out;
1da177e4 2628
cccef3b9 2629 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2630 if (status == 0) {
2631 update_changeattr(dir, &res.cinfo);
d346890b 2632 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2633 }
d346890b
TM		 2634 nfs_free_fattr(res.dir_attr);
2635out:
1da177e4
LT		 2636 return status;
2637}
2638
2639static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2640{
2641 struct nfs4_exception exception = { };
2642 int err;
2643 do {
2644 err = nfs4_handle_exception(NFS_SERVER(dir),
2645 _nfs4_proc_remove(dir, name),
2646 &exception);
2647 } while (exception.retry);
2648 return err;
2649}
2650
e4eff1a6 2651static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2652{
e4eff1a6
TM		 2653 struct nfs_server *server = NFS_SERVER(dir);
2654 struct nfs_removeargs *args = msg->rpc_argp;
2655 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2656
a65318bf 2657 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2658 res->server = server;
1da177e4 2659 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2660}
2661
e4eff1a6 2662static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2663{
e4eff1a6
TM		 2664 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2665
14516c3a
TM		 2666 if (!nfs4_sequence_done(task, &res->seq_res))
2667 return 0;
9e33bed5 2668 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2669 return 0;
2670 update_changeattr(dir, &res->cinfo);
d346890b 2671 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2672 return 1;
1da177e4
LT		 2673}
2674
2675static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2676 struct inode *new_dir, struct qstr *new_name)
2677{
6caf2c82 2678 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2679 struct nfs4_rename_arg arg = {
2680 .old_dir = NFS_FH(old_dir),
2681 .new_dir = NFS_FH(new_dir),
2682 .old_name = old_name,
2683 .new_name = new_name,
6caf2c82
TM		 2684 .bitmask = server->attr_bitmask,
2685 };
6caf2c82
TM		 2686 struct nfs4_rename_res res = {
2687 .server = server,
1da177e4 2688 };
1da177e4
LT		 2689 struct rpc_message msg = {
2690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2691 .rpc_argp = &arg,
2692 .rpc_resp = &res,
2693 };
011fff72 2694 int status = -ENOMEM;
1da177e4 2695
011fff72
TM		 2696 res.old_fattr = nfs_alloc_fattr();
2697 res.new_fattr = nfs_alloc_fattr();
2698 if (res.old_fattr == NULL || res.new_fattr == NULL)
2699 goto out;
1da177e4 2700
011fff72 2701 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2702 if (!status) {
2703 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2704 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2705 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2706 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2707 }
011fff72
TM		 2708out:
2709 nfs_free_fattr(res.new_fattr);
2710 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2711 return status;
2712}
2713
2714static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2715 struct inode *new_dir, struct qstr *new_name)
2716{
2717 struct nfs4_exception exception = { };
2718 int err;
2719 do {
2720 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2721 _nfs4_proc_rename(old_dir, old_name,
2722 new_dir, new_name),
2723 &exception);
2724 } while (exception.retry);
2725 return err;
2726}
2727
2728static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2729{
91ba2eee 2730 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2731 struct nfs4_link_arg arg = {
2732 .fh = NFS_FH(inode),
2733 .dir_fh = NFS_FH(dir),
2734 .name = name,
91ba2eee
TM		 2735 .bitmask = server->attr_bitmask,
2736 };
91ba2eee
TM		 2737 struct nfs4_link_res res = {
2738 .server = server,
1da177e4 2739 };
1da177e4
LT		 2740 struct rpc_message msg = {
2741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2742 .rpc_argp = &arg,
91ba2eee 2743 .rpc_resp = &res,
1da177e4 2744 };
136f2627
TM		 2745 int status = -ENOMEM;
2746
2747 res.fattr = nfs_alloc_fattr();
2748 res.dir_attr = nfs_alloc_fattr();
2749 if (res.fattr == NULL || res.dir_attr == NULL)
2750 goto out;
1da177e4 2751
cccef3b9 2752 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2753 if (!status) {
2754 update_changeattr(dir, &res.cinfo);
2755 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2756 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2757 }
136f2627
TM		 2758out:
2759 nfs_free_fattr(res.dir_attr);
2760 nfs_free_fattr(res.fattr);
1da177e4
LT		 2761 return status;
2762}
2763
2764static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2765{
2766 struct nfs4_exception exception = { };
2767 int err;
2768 do {
2769 err = nfs4_handle_exception(NFS_SERVER(inode),
2770 _nfs4_proc_link(inode, dir, name),
2771 &exception);
2772 } while (exception.retry);
2773 return err;
2774}
2775
57dc9a57
TM		 2776struct nfs4_createdata {
2777 struct rpc_message msg;
2778 struct nfs4_create_arg arg;
2779 struct nfs4_create_res res;
2780 struct nfs_fh fh;
2781 struct nfs_fattr fattr;
2782 struct nfs_fattr dir_fattr;
2783};
2784
2785static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2786 struct qstr *name, struct iattr *sattr, u32 ftype)
2787{
2788 struct nfs4_createdata *data;
2789
2790 data = kzalloc(sizeof(*data), GFP_KERNEL);
2791 if (data != NULL) {
2792 struct nfs_server *server = NFS_SERVER(dir);
2793
2794 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2795 data->msg.rpc_argp = &data->arg;
2796 data->msg.rpc_resp = &data->res;
2797 data->arg.dir_fh = NFS_FH(dir);
2798 data->arg.server = server;
2799 data->arg.name = name;
2800 data->arg.attrs = sattr;
2801 data->arg.ftype = ftype;
2802 data->arg.bitmask = server->attr_bitmask;
2803 data->res.server = server;
2804 data->res.fh = &data->fh;
2805 data->res.fattr = &data->fattr;
2806 data->res.dir_fattr = &data->dir_fattr;
2807 nfs_fattr_init(data->res.fattr);
2808 nfs_fattr_init(data->res.dir_fattr);
2809 }
2810 return data;
2811}
2812
2813static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2814{
cccef3b9
AA		 2815 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2816 &data->arg, &data->res, 1);
57dc9a57
TM		 2817 if (status == 0) {
2818 update_changeattr(dir, &data->res.dir_cinfo);
2819 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2820 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2821 }
2822 return status;
2823}
2824
2825static void nfs4_free_createdata(struct nfs4_createdata *data)
2826{
2827 kfree(data);
2828}
2829
4f390c15 2830static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2831 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2832{
57dc9a57
TM		 2833 struct nfs4_createdata *data;
2834 int status = -ENAMETOOLONG;
1da177e4 2835
94a6d753 2836 if (len > NFS4_MAXPATHLEN)
57dc9a57 2837 goto out;
4f390c15 2838
57dc9a57
TM		 2839 status = -ENOMEM;
2840 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2841 if (data == NULL)
2842 goto out;
2843
2844 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2845 data->arg.u.symlink.pages = &page;
2846 data->arg.u.symlink.len = len;
1da177e4 2847
57dc9a57
TM		 2848 status = nfs4_do_create(dir, dentry, data);
2849
2850 nfs4_free_createdata(data);
2851out:
1da177e4
LT		 2852 return status;
2853}
2854
4f390c15 2855static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2856 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2857{
2858 struct nfs4_exception exception = { };
2859 int err;
2860 do {
2861 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2862 _nfs4_proc_symlink(dir, dentry, page,
2863 len, sattr),
1da177e4
LT		 2864 &exception);
2865 } while (exception.retry);
2866 return err;
2867}
2868
2869static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2870 struct iattr *sattr)
2871{
57dc9a57
TM		 2872 struct nfs4_createdata *data;
2873 int status = -ENOMEM;
1da177e4 2874
57dc9a57
TM		 2875 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2876 if (data == NULL)
2877 goto out;
2878
2879 status = nfs4_do_create(dir, dentry, data);
2880
2881 nfs4_free_createdata(data);
2882out:
1da177e4
LT		 2883 return status;
2884}
2885
2886static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2887 struct iattr *sattr)
2888{
2889 struct nfs4_exception exception = { };
2890 int err;
2891 do {
2892 err = nfs4_handle_exception(NFS_SERVER(dir),
2893 _nfs4_proc_mkdir(dir, dentry, sattr),
2894 &exception);
2895 } while (exception.retry);
2896 return err;
2897}
2898
2899static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2900 u64 cookie, struct page *page, unsigned int count, int plus)
2901{
2902 struct inode *dir = dentry->d_inode;
2903 struct nfs4_readdir_arg args = {
2904 .fh = NFS_FH(dir),
2905 .pages = &page,
2906 .pgbase = 0,
2907 .count = count,
96d25e53 2908 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2909 };
2910 struct nfs4_readdir_res res;
2911 struct rpc_message msg = {
2912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2913 .rpc_argp = &args,
2914 .rpc_resp = &res,
2915 .rpc_cred = cred,
2916 };
2917 int status;
2918
3110ff80 2919 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2920 dentry->d_parent->d_name.name,
2921 dentry->d_name.name,
2922 (unsigned long long)cookie);
1da177e4
LT		 2923 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2924 res.pgbase = args.pgbase;
cccef3b9 2925 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2926 if (status == 0)
2927 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2928
2929 nfs_invalidate_atime(dir);
2930
3110ff80 2931 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2932 return status;
2933}
2934
2935static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2936 u64 cookie, struct page *page, unsigned int count, int plus)
2937{
2938 struct nfs4_exception exception = { };
2939 int err;
2940 do {
2941 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2942 _nfs4_proc_readdir(dentry, cred, cookie,
2943 page, count, plus),
2944 &exception);
2945 } while (exception.retry);
2946 return err;
2947}
2948
2949static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2950 struct iattr *sattr, dev_t rdev)
2951{
57dc9a57
TM		 2952 struct nfs4_createdata *data;
2953 int mode = sattr->ia_mode;
2954 int status = -ENOMEM;
1da177e4
LT		 2955
2956 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2957 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2958
2959 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2960 if (data == NULL)
2961 goto out;
2962
1da177e4 2963 if (S_ISFIFO(mode))
57dc9a57 2964 data->arg.ftype = NF4FIFO;
1da177e4 2965 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2966 data->arg.ftype = NF4BLK;
2967 data->arg.u.device.specdata1 = MAJOR(rdev);
2968 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2969 }
2970 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2971 data->arg.ftype = NF4CHR;
2972 data->arg.u.device.specdata1 = MAJOR(rdev);
2973 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2974 }
1da177e4 2975
57dc9a57
TM		 2976 status = nfs4_do_create(dir, dentry, data);
2977
2978 nfs4_free_createdata(data);
2979out:
1da177e4
LT		 2980 return status;
2981}
2982
2983static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2984 struct iattr *sattr, dev_t rdev)
2985{
2986 struct nfs4_exception exception = { };
2987 int err;
2988 do {
2989 err = nfs4_handle_exception(NFS_SERVER(dir),
2990 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2991 &exception);
2992 } while (exception.retry);
2993 return err;
2994}
2995
2996static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2997 struct nfs_fsstat *fsstat)
2998{
2999 struct nfs4_statfs_arg args = {
3000 .fh = fhandle,
3001 .bitmask = server->attr_bitmask,
3002 };
24ad148a
BH		 3003 struct nfs4_statfs_res res = {
3004 .fsstat = fsstat,
3005 };
1da177e4
LT		 3006 struct rpc_message msg = {
3007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3008 .rpc_argp = &args,
24ad148a 3009 .rpc_resp = &res,
1da177e4
LT		 3010 };
3011
0e574af1 3012 nfs_fattr_init(fsstat->fattr);
cccef3b9 3013 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3014}
3015
3016static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3017{
3018 struct nfs4_exception exception = { };
3019 int err;
3020 do {
3021 err = nfs4_handle_exception(server,
3022 _nfs4_proc_statfs(server, fhandle, fsstat),
3023 &exception);
3024 } while (exception.retry);
3025 return err;
3026}
3027
3028static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3029 struct nfs_fsinfo *fsinfo)
3030{
3031 struct nfs4_fsinfo_arg args = {
3032 .fh = fhandle,
3033 .bitmask = server->attr_bitmask,
3034 };
3dda5e43
BH		 3035 struct nfs4_fsinfo_res res = {
3036 .fsinfo = fsinfo,
3037 };
1da177e4
LT		 3038 struct rpc_message msg = {
3039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3040 .rpc_argp = &args,
3dda5e43 3041 .rpc_resp = &res,
1da177e4
LT		 3042 };
3043
cccef3b9 3044 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3045}
3046
3047static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3048{
3049 struct nfs4_exception exception = { };
3050 int err;
3051
3052 do {
3053 err = nfs4_handle_exception(server,
3054 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3055 &exception);
3056 } while (exception.retry);
3057 return err;
3058}
3059
3060static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3061{
0e574af1 3062 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3063 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3064}
3065
3066static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3067 struct nfs_pathconf *pathconf)
3068{
3069 struct nfs4_pathconf_arg args = {
3070 .fh = fhandle,
3071 .bitmask = server->attr_bitmask,
3072 };
d45b2989
BH		 3073 struct nfs4_pathconf_res res = {
3074 .pathconf = pathconf,
3075 };
1da177e4
LT		 3076 struct rpc_message msg = {
3077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3078 .rpc_argp = &args,
d45b2989 3079 .rpc_resp = &res,
1da177e4
LT		 3080 };
3081
3082 /* None of the pathconf attributes are mandatory to implement */
3083 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3084 memset(pathconf, 0, sizeof(*pathconf));
3085 return 0;
3086 }
3087
0e574af1 3088 nfs_fattr_init(pathconf->fattr);
cccef3b9 3089 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3090}
3091
3092static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3093 struct nfs_pathconf *pathconf)
3094{
3095 struct nfs4_exception exception = { };
3096 int err;
3097
3098 do {
3099 err = nfs4_handle_exception(server,
3100 _nfs4_proc_pathconf(server, fhandle, pathconf),
3101 &exception);
3102 } while (exception.retry);
3103 return err;
3104}
3105
ec06c096 3106static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3107{
ec06c096 3108 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3109
f11c88af
AA		 3110 dprintk("--> %s\n", __func__);
3111
14516c3a
TM		 3112 if (!nfs4_sequence_done(task, &data->res.seq_res))
3113 return -EAGAIN;
f11c88af 3114
9e33bed5 3115 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3116 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3117 return -EAGAIN;
1da177e4 3118 }
8850df99
TM		 3119
3120 nfs_invalidate_atime(data->inode);
1da177e4 3121 if (task->tk_status > 0)
ec06c096
TM		 3122 renew_lease(server, data->timestamp);
3123 return 0;
1da177e4
LT		 3124}
3125
bdc7f021 3126static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3127{
1da177e4 3128 data->timestamp = jiffies;
bdc7f021 3129 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3130}
3131
788e7a89 3132static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3133{
1da177e4
LT		 3134 struct inode *inode = data->inode;
3135
14516c3a
TM		 3136 if (!nfs4_sequence_done(task, &data->res.seq_res))
3137 return -EAGAIN;
def6ed7e 3138
9e33bed5 3139 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3140 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3141 return -EAGAIN;
1da177e4 3142 }
4f9838c7 3143 if (task->tk_status >= 0) {
1da177e4 3144 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3145 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3146 }
788e7a89 3147 return 0;
1da177e4
LT		 3148}
3149
bdc7f021 3150static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3151{
bdc7f021
TM		 3152 struct nfs_server *server = NFS_SERVER(data->inode);
3153
a65318bf 3154 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3155 data->res.server = server;
1da177e4
LT		 3156 data->timestamp = jiffies;
3157
bdc7f021 3158 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3159}
3160
788e7a89 3161static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3162{
1da177e4
LT		 3163 struct inode *inode = data->inode;
3164
14516c3a
TM		 3165 if (!nfs4_sequence_done(task, &data->res.seq_res))
3166 return -EAGAIN;
3167
9e33bed5 3168 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3169 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3170 return -EAGAIN;
1da177e4 3171 }
9e08a3c5 3172 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3173 return 0;
1da177e4
LT		 3174}
3175
bdc7f021 3176static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3177{
788e7a89 3178 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3179
a65318bf 3180 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3181 data->res.server = server;
bdc7f021 3182 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3183}
3184
9bc4e3ca
CL		 3185struct nfs4_renewdata {
3186 struct nfs_client *client;
3187 unsigned long timestamp;
3188};
3189
1da177e4
LT		 3190/*
3191 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3192 * standalone procedure for queueing an asynchronous RENEW.
3193 */
9bc4e3ca 3194static void nfs4_renew_release(void *calldata)
dc96aef9 3195{
9bc4e3ca
CL		 3196 struct nfs4_renewdata *data = calldata;
3197 struct nfs_client *clp = data->client;
dc96aef9 3198
0851de06
AB		 3199 if (atomic_read(&clp->cl_count) > 1)
3200 nfs4_schedule_state_renewal(clp);
3201 nfs_put_client(clp);
9bc4e3ca 3202 kfree(data);
dc96aef9
AB		 3203}
3204
9bc4e3ca 3205static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3206{
9bc4e3ca
CL		 3207 struct nfs4_renewdata *data = calldata;
3208 struct nfs_client *clp = data->client;
3209 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3210
3211 if (task->tk_status < 0) {
95baa25c
TM		 3212 /* Unless we're shutting down, schedule state recovery! */
3213 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3214 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3215 return;
3216 }
452e9352 3217 do_renew_lease(clp, timestamp);
1da177e4
LT		 3218}
3219
963d8fe5
TM		 3220static const struct rpc_call_ops nfs4_renew_ops = {
3221 .rpc_call_done = nfs4_renew_done,
dc96aef9 3222 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3223};
3224
adfa6f98 3225int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3226{
3227 struct rpc_message msg = {
3228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3229 .rpc_argp = clp,
b4454fe1 3230 .rpc_cred = cred,
1da177e4 3231 };
9bc4e3ca 3232 struct nfs4_renewdata *data;
1da177e4 3233
0851de06
AB		 3234 if (!atomic_inc_not_zero(&clp->cl_count))
3235 return -EIO;
9bc4e3ca
CL		 3236 data = kmalloc(sizeof(*data), GFP_KERNEL);
3237 if (data == NULL)
3238 return -ENOMEM;
3239 data->client = clp;
3240 data->timestamp = jiffies;
1da177e4 3241 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3242 &nfs4_renew_ops, data);
1da177e4
LT		 3243}
3244
adfa6f98 3245int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3246{
3247 struct rpc_message msg = {
3248 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3249 .rpc_argp = clp,
b4454fe1 3250 .rpc_cred = cred,
1da177e4
LT		 3251 };
3252 unsigned long now = jiffies;
3253 int status;
3254
3255 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3256 if (status < 0)
3257 return status;
452e9352 3258 do_renew_lease(clp, now);
1da177e4
LT		 3259 return 0;
3260}
3261
aa1870af
BF		 3262static inline int nfs4_server_supports_acls(struct nfs_server *server)
3263{
3264 return (server->caps & NFS_CAP_ACLS)
3265 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3266 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3267}
3268
3269/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3270 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3271 * the stack.
3272 */
3273#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3274
3275static void buf_to_pages(const void *buf, size_t buflen,
3276 struct page **pages, unsigned int *pgbase)
3277{
3278 const void *p = buf;
3279
3280 *pgbase = offset_in_page(buf);
3281 p -= *pgbase;
3282 while (p < buf + buflen) {
3283 *(pages++) = virt_to_page(p);
3284 p += PAGE_CACHE_SIZE;
3285 }
3286}
3287
e50a1c2e
BF		 3288struct nfs4_cached_acl {
3289 int cached;
3290 size_t len;
3e9d4154 3291 char data[0];
e50a1c2e
BF		 3292};
3293
3294static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3295{
3296 struct nfs_inode *nfsi = NFS_I(inode);
3297
3298 spin_lock(&inode->i_lock);
3299 kfree(nfsi->nfs4_acl);
3300 nfsi->nfs4_acl = acl;
3301 spin_unlock(&inode->i_lock);
3302}
3303
3304static void nfs4_zap_acl_attr(struct inode *inode)
3305{
3306 nfs4_set_cached_acl(inode, NULL);
3307}
3308
3309static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3310{
3311 struct nfs_inode *nfsi = NFS_I(inode);
3312 struct nfs4_cached_acl *acl;
3313 int ret = -ENOENT;
3314
3315 spin_lock(&inode->i_lock);
3316 acl = nfsi->nfs4_acl;
3317 if (acl == NULL)
3318 goto out;
3319 if (buf == NULL) /* user is just asking for length */
3320 goto out_len;
3321 if (acl->cached == 0)
3322 goto out;
3323 ret = -ERANGE; /* see getxattr(2) man page */
3324 if (acl->len > buflen)
3325 goto out;
3326 memcpy(buf, acl->data, acl->len);
3327out_len:
3328 ret = acl->len;
3329out:
3330 spin_unlock(&inode->i_lock);
3331 return ret;
3332}
3333
3334static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3335{
3336 struct nfs4_cached_acl *acl;
3337
3338 if (buf && acl_len <= PAGE_SIZE) {
3339 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3340 if (acl == NULL)
3341 goto out;
3342 acl->cached = 1;
3343 memcpy(acl->data, buf, acl_len);
3344 } else {
3345 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3346 if (acl == NULL)
3347 goto out;
3348 acl->cached = 0;
3349 }
3350 acl->len = acl_len;
3351out:
3352 nfs4_set_cached_acl(inode, acl);
3353}
3354
16b4289c 3355static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3356{
aa1870af
BF		 3357 struct page *pages[NFS4ACL_MAXPAGES];
3358 struct nfs_getaclargs args = {
3359 .fh = NFS_FH(inode),
3360 .acl_pages = pages,
3361 .acl_len = buflen,
3362 };
663c79b3
BH		 3363 struct nfs_getaclres res = {
3364 .acl_len = buflen,
3365 };
e50a1c2e 3366 void *resp_buf;
aa1870af
BF		 3367 struct rpc_message msg = {
3368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3369 .rpc_argp = &args,
663c79b3 3370 .rpc_resp = &res,
aa1870af 3371 };
e50a1c2e 3372 struct page *localpage = NULL;
aa1870af
BF		 3373 int ret;
3374
e50a1c2e
BF		 3375 if (buflen < PAGE_SIZE) {
3376 /* As long as we're doing a round trip to the server anyway,
3377 * let's be prepared for a page of acl data. */
3378 localpage = alloc_page(GFP_KERNEL);
3379 resp_buf = page_address(localpage);
3380 if (localpage == NULL)
3381 return -ENOMEM;
3382 args.acl_pages[0] = localpage;
3383 args.acl_pgbase = 0;
663c79b3 3384 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3385 } else {
3386 resp_buf = buf;
3387 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3388 }
cccef3b9 3389 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3390 if (ret)
3391 goto out_free;
663c79b3
BH		 3392 if (res.acl_len > args.acl_len)
3393 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3394 else
663c79b3 3395 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3396 if (buf) {
3397 ret = -ERANGE;
663c79b3 3398 if (res.acl_len > buflen)
e50a1c2e
BF		 3399 goto out_free;
3400 if (localpage)
663c79b3 3401 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3402 }
663c79b3 3403 ret = res.acl_len;
e50a1c2e
BF		 3404out_free:
3405 if (localpage)
3406 __free_page(localpage);
aa1870af
BF		 3407 return ret;
3408}
3409
16b4289c
TM		 3410static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3411{
3412 struct nfs4_exception exception = { };
3413 ssize_t ret;
3414 do {
3415 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3416 if (ret >= 0)
3417 break;
3418 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3419 } while (exception.retry);
3420 return ret;
3421}
3422
e50a1c2e
BF		 3423static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3424{
3425 struct nfs_server *server = NFS_SERVER(inode);
3426 int ret;
3427
3428 if (!nfs4_server_supports_acls(server))
3429 return -EOPNOTSUPP;
3430 ret = nfs_revalidate_inode(server, inode);
3431 if (ret < 0)
3432 return ret;
3433 ret = nfs4_read_cached_acl(inode, buf, buflen);
3434 if (ret != -ENOENT)
3435 return ret;
3436 return nfs4_get_acl_uncached(inode, buf, buflen);
3437}
3438
16b4289c 3439static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3440{
3441 struct nfs_server *server = NFS_SERVER(inode);
3442 struct page *pages[NFS4ACL_MAXPAGES];
3443 struct nfs_setaclargs arg = {
3444 .fh = NFS_FH(inode),
3445 .acl_pages = pages,
3446 .acl_len = buflen,
3447 };
73c403a9 3448 struct nfs_setaclres res;
4b580ee3
BF		 3449 struct rpc_message msg = {
3450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3451 .rpc_argp = &arg,
73c403a9 3452 .rpc_resp = &res,
4b580ee3
BF		 3453 };
3454 int ret;
3455
3456 if (!nfs4_server_supports_acls(server))
3457 return -EOPNOTSUPP;
642ac549 3458 nfs_inode_return_delegation(inode);
4b580ee3 3459 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3460 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3461 nfs_access_zap_cache(inode);
3462 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3463 return ret;
3464}
3465
16b4289c
TM		 3466static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3467{
3468 struct nfs4_exception exception = { };
3469 int err;
3470 do {
3471 err = nfs4_handle_exception(NFS_SERVER(inode),
3472 __nfs4_proc_set_acl(inode, buf, buflen),
3473 &exception);
3474 } while (exception.retry);
3475 return err;
3476}
3477
1da177e4 3478static int
aa5190d0 3479nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3480{
aa5190d0
TM		 3481 struct nfs_client *clp = server->nfs_client;
3482
3483 if (task->tk_status >= 0)
1da177e4
LT		 3484 return 0;
3485 switch(task->tk_status) {
9e33bed5
TM		 3486 case -NFS4ERR_ADMIN_REVOKED:
3487 case -NFS4ERR_BAD_STATEID:
3488 case -NFS4ERR_OPENMODE:
3489 if (state == NULL)
3490 break;
3491 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3492 goto do_state_recovery;
1da177e4 3493 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3494 if (state == NULL)
3495 break;
3496 nfs4_state_mark_reclaim_reboot(clp, state);
3497 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3498 case -NFS4ERR_EXPIRED:
a2c0b9e2 3499 goto do_state_recovery;
4745e315
AA		 3500#if defined(CONFIG_NFS_V4_1)
3501 case -NFS4ERR_BADSESSION:
3502 case -NFS4ERR_BADSLOT:
3503 case -NFS4ERR_BAD_HIGH_SLOT:
3504 case -NFS4ERR_DEADSESSION:
3505 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3506 case -NFS4ERR_SEQ_FALSE_RETRY:
3507 case -NFS4ERR_SEQ_MISORDERED:
3508 dprintk("%s ERROR %d, Reset session\n", __func__,
3509 task->tk_status);
0b9e2d41 3510 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3511 task->tk_status = 0;
3512 return -EAGAIN;
3513#endif /* CONFIG_NFS_V4_1 */
1da177e4 3514 case -NFS4ERR_DELAY:
aa5190d0 3515 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3516 case -NFS4ERR_GRACE:
2c643488 3517 case -EKEYEXPIRED:
1da177e4
LT		 3518 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3519 task->tk_status = 0;
3520 return -EAGAIN;
3521 case -NFS4ERR_OLD_STATEID:
3522 task->tk_status = 0;
3523 return -EAGAIN;
3524 }
3525 task->tk_status = nfs4_map_errors(task->tk_status);
3526 return 0;
a2c0b9e2
TM		 3527do_state_recovery:
3528 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3529 nfs4_schedule_state_recovery(clp);
3530 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3531 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3532 task->tk_status = 0;
3533 return -EAGAIN;
1da177e4
LT		 3534}
3535
bb8b27e5
TM		 3536int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3537 unsigned short port, struct rpc_cred *cred,
3538 struct nfs4_setclientid_res *res)
1da177e4
LT		 3539{
3540 nfs4_verifier sc_verifier;
3541 struct nfs4_setclientid setclientid = {
3542 .sc_verifier = &sc_verifier,
3543 .sc_prog = program,
3544 };
3545 struct rpc_message msg = {
3546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3547 .rpc_argp = &setclientid,
bb8b27e5 3548 .rpc_resp = res,
286d7d6a 3549 .rpc_cred = cred,
1da177e4 3550 };
bc4785cd 3551 __be32 *p;
1da177e4
LT		 3552 int loop = 0;
3553 int status;
3554
bc4785cd 3555 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3556 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3557 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3558
3559 for(;;) {
3560 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3561 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3562 clp->cl_ipaddr,
3563 rpc_peeraddr2str(clp->cl_rpcclient,
3564 RPC_DISPLAY_ADDR),
69dd716c
TM		 3565 rpc_peeraddr2str(clp->cl_rpcclient,
3566 RPC_DISPLAY_PROTO),
78ea323b 3567 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3568 clp->cl_id_uniquifier);
3569 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3570 sizeof(setclientid.sc_netid),
3571 rpc_peeraddr2str(clp->cl_rpcclient,
3572 RPC_DISPLAY_NETID));
1da177e4 3573 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3574 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3575 clp->cl_ipaddr, port >> 8, port & 255);
3576
3577 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3578 if (status != -NFS4ERR_CLID_INUSE)
3579 break;
3580 if (signalled())
3581 break;
3582 if (loop++ & 1)
3583 ssleep(clp->cl_lease_time + 1);
3584 else
3585 if (++clp->cl_id_uniquifier == 0)
3586 break;
3587 }
3588 return status;
3589}
3590
bb8b27e5
TM		 3591static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3592 struct nfs4_setclientid_res *arg,
3593 struct rpc_cred *cred)
1da177e4
LT		 3594{
3595 struct nfs_fsinfo fsinfo;
3596 struct rpc_message msg = {
3597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3598 .rpc_argp = arg,
1da177e4 3599 .rpc_resp = &fsinfo,
286d7d6a 3600 .rpc_cred = cred,
1da177e4
LT		 3601 };
3602 unsigned long now;
3603 int status;
3604
3605 now = jiffies;
3606 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3607 if (status == 0) {
3608 spin_lock(&clp->cl_lock);
3609 clp->cl_lease_time = fsinfo.lease_time * HZ;
3610 clp->cl_last_renewal = now;
3611 spin_unlock(&clp->cl_lock);
3612 }
3613 return status;
3614}
3615
bb8b27e5
TM		 3616int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3617 struct nfs4_setclientid_res *arg,
3618 struct rpc_cred *cred)
51581f3b 3619{
77e03677 3620 long timeout = 0;
51581f3b
TM		 3621 int err;
3622 do {
bb8b27e5 3623 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3624 switch (err) {
3625 case 0:
3626 return err;
3627 case -NFS4ERR_RESOURCE:
3628 /* The IBM lawyers misread another document! */
3629 case -NFS4ERR_DELAY:
2c643488 3630 case -EKEYEXPIRED:
51581f3b
TM		 3631 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3632 }
3633 } while (err == 0);
3634 return err;
3635}
3636
fe650407
TM		 3637struct nfs4_delegreturndata {
3638 struct nfs4_delegreturnargs args;
fa178f29 3639 struct nfs4_delegreturnres res;
fe650407
TM		 3640 struct nfs_fh fh;
3641 nfs4_stateid stateid;
26e976a8 3642 unsigned long timestamp;
fa178f29 3643 struct nfs_fattr fattr;
fe650407
TM		 3644 int rpc_status;
3645};
3646
fe650407
TM		 3647static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3648{
3649 struct nfs4_delegreturndata *data = calldata;
938e1010 3650
14516c3a
TM		 3651 if (!nfs4_sequence_done(task, &data->res.seq_res))
3652 return;
938e1010 3653
79708861
RL		 3654 switch (task->tk_status) {
3655 case -NFS4ERR_STALE_STATEID:
3656 case -NFS4ERR_EXPIRED:
3657 case 0:
fa178f29 3658 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3659 break;
3660 default:
3661 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3662 -EAGAIN) {
3663 nfs_restart_rpc(task, data->res.server->nfs_client);
3664 return;
3665 }
3666 }
3667 data->rpc_status = task->tk_status;
fe650407
TM		 3668}
3669
3670static void nfs4_delegreturn_release(void *calldata)
3671{
fe650407
TM		 3672 kfree(calldata);
3673}
3674
938e1010
AA		 3675#if defined(CONFIG_NFS_V4_1)
3676static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3677{
3678 struct nfs4_delegreturndata *d_data;
3679
3680 d_data = (struct nfs4_delegreturndata *)data;
3681
035168ab 3682 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3683 &d_data->args.seq_args,
3684 &d_data->res.seq_res, 1, task))
3685 return;
3686 rpc_call_start(task);
3687}
3688#endif /* CONFIG_NFS_V4_1 */
3689
c8d149f3 3690static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3691#if defined(CONFIG_NFS_V4_1)
3692 .rpc_call_prepare = nfs4_delegreturn_prepare,
3693#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3694 .rpc_call_done = nfs4_delegreturn_done,
3695 .rpc_release = nfs4_delegreturn_release,
3696};
3697
e6f81075 3698static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3699{
3700 struct nfs4_delegreturndata *data;
fa178f29 3701 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3702 struct rpc_task *task;
5138fde0
TM		 3703 struct rpc_message msg = {
3704 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3705 .rpc_cred = cred,
3706 };
c970aa85
TM		 3707 struct rpc_task_setup task_setup_data = {
3708 .rpc_client = server->client,
5138fde0 3709 .rpc_message = &msg,
c970aa85
TM		 3710 .callback_ops = &nfs4_delegreturn_ops,
3711 .flags = RPC_TASK_ASYNC,
3712 };
e6f81075 3713 int status = 0;
fe650407 3714
8535b2be 3715 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3716 if (data == NULL)
3717 return -ENOMEM;
3718 data->args.fhandle = &data->fh;
3719 data->args.stateid = &data->stateid;
fa178f29 3720 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3721 nfs_copy_fh(&data->fh, NFS_FH(inode));
3722 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3723 data->res.fattr = &data->fattr;
3724 data->res.server = server;
5f7dbd5c 3725 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3726 nfs_fattr_init(data->res.fattr);
26e976a8 3727 data->timestamp = jiffies;
fe650407
TM		 3728 data->rpc_status = 0;
3729
c970aa85 3730 task_setup_data.callback_data = data;
5138fde0
TM		 3731 msg.rpc_argp = &data->args,
3732 msg.rpc_resp = &data->res,
c970aa85 3733 task = rpc_run_task(&task_setup_data);
7a1218a2 3734 if (IS_ERR(task))
fe650407 3735 return PTR_ERR(task);
e6f81075
TM		 3736 if (!issync)
3737 goto out;
fe650407 3738 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3739 if (status != 0)
3740 goto out;
3741 status = data->rpc_status;
3742 if (status != 0)
3743 goto out;
3744 nfs_refresh_inode(inode, &data->fattr);
3745out:
e6b3c4db 3746 rpc_put_task(task);
fe650407 3747 return status;
1da177e4
LT		 3748}
3749
e6f81075 3750int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3751{
3752 struct nfs_server *server = NFS_SERVER(inode);
3753 struct nfs4_exception exception = { };
3754 int err;
3755 do {
e6f81075 3756 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3757 switch (err) {
3758 case -NFS4ERR_STALE_STATEID:
3759 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3760 case 0:
3761 return 0;
3762 }
3763 err = nfs4_handle_exception(server, err, &exception);
3764 } while (exception.retry);
3765 return err;
3766}
3767
3768#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3769#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3770
3771/*
3772 * sleep, with exponential backoff, and retry the LOCK operation.
3773 */
3774static unsigned long
3775nfs4_set_lock_task_retry(unsigned long timeout)
3776{
150030b7 3777 schedule_timeout_killable(timeout);
1da177e4
LT		 3778 timeout <<= 1;
3779 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3780 return NFS4_LOCK_MAXTIMEOUT;
3781 return timeout;
3782}
3783
1da177e4
LT		 3784static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3785{
3786 struct inode *inode = state->inode;
3787 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3788 struct nfs_client *clp = server->nfs_client;
911d1aaf 3789 struct nfs_lockt_args arg = {
1da177e4 3790 .fh = NFS_FH(inode),
911d1aaf 3791 .fl = request,
1da177e4 3792 };
911d1aaf
TM		 3793 struct nfs_lockt_res res = {
3794 .denied = request,
1da177e4
LT		 3795 };
3796 struct rpc_message msg = {
3797 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3798 .rpc_argp = &arg,
3799 .rpc_resp = &res,
3800 .rpc_cred = state->owner->so_cred,
3801 };
1da177e4
LT		 3802 struct nfs4_lock_state *lsp;
3803 int status;
3804
911d1aaf 3805 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3806 status = nfs4_set_lock_state(state, request);
3807 if (status != 0)
3808 goto out;
3809 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3810 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3811 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3812 switch (status) {
3813 case 0:
3814 request->fl_type = F_UNLCK;
3815 break;
3816 case -NFS4ERR_DENIED:
3817 status = 0;
1da177e4 3818 }
70cc6487 3819 request->fl_ops->fl_release_private(request);
8d0a8a9d 3820out:
1da177e4
LT		 3821 return status;
3822}
3823
3824static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3825{
3826 struct nfs4_exception exception = { };
3827 int err;
3828
3829 do {
3830 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3831 _nfs4_proc_getlk(state, cmd, request),
3832 &exception);
3833 } while (exception.retry);
3834 return err;
3835}
3836
3837static int do_vfs_lock(struct file *file, struct file_lock *fl)
3838{
3839 int res = 0;
3840 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3841 case FL_POSIX:
3842 res = posix_lock_file_wait(file, fl);
3843 break;
3844 case FL_FLOCK:
3845 res = flock_lock_file_wait(file, fl);
3846 break;
3847 default:
3848 BUG();
3849 }
1da177e4
LT		 3850 return res;
3851}
3852
faf5f49c 3853struct nfs4_unlockdata {
911d1aaf
TM		 3854 struct nfs_locku_args arg;
3855 struct nfs_locku_res res;
faf5f49c
TM		 3856 struct nfs4_lock_state *lsp;
3857 struct nfs_open_context *ctx;
911d1aaf
TM		 3858 struct file_lock fl;
3859 const struct nfs_server *server;
26e976a8 3860 unsigned long timestamp;
faf5f49c
TM		 3861};
3862
911d1aaf
TM		 3863static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3864 struct nfs_open_context *ctx,
3865 struct nfs4_lock_state *lsp,
3866 struct nfs_seqid *seqid)
3867{
3868 struct nfs4_unlockdata *p;
3869 struct inode *inode = lsp->ls_state->inode;
3870
8535b2be 3871 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3872 if (p == NULL)
3873 return NULL;
3874 p->arg.fh = NFS_FH(inode);
3875 p->arg.fl = &p->fl;
3876 p->arg.seqid = seqid;
c1d51931 3877 p->res.seqid = seqid;
5f7dbd5c 3878 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3879 p->arg.stateid = &lsp->ls_stateid;
3880 p->lsp = lsp;
3881 atomic_inc(&lsp->ls_count);
3882 /* Ensure we don't close file until we're done freeing locks! */
3883 p->ctx = get_nfs_open_context(ctx);
3884 memcpy(&p->fl, fl, sizeof(p->fl));
3885 p->server = NFS_SERVER(inode);
3886 return p;
3887}
3888
06f814a3 3889static void nfs4_locku_release_calldata(void *data)
faf5f49c 3890{
963d8fe5 3891 struct nfs4_unlockdata *calldata = data;
911d1aaf 3892 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3893 nfs4_put_lock_state(calldata->lsp);
3894 put_nfs_open_context(calldata->ctx);
3895 kfree(calldata);
faf5f49c
TM		 3896}
3897
963d8fe5 3898static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3899{
963d8fe5 3900 struct nfs4_unlockdata *calldata = data;
faf5f49c 3901
14516c3a
TM		 3902 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3903 return;
faf5f49c
TM		 3904 switch (task->tk_status) {
3905 case 0:
3906 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3907 calldata->res.stateid.data,
faf5f49c 3908 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3909 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3910 break;
9e33bed5
TM		 3911 case -NFS4ERR_BAD_STATEID:
3912 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3913 case -NFS4ERR_STALE_STATEID:
3914 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3915 break;
3916 default:
9e33bed5 3917 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3918 nfs_restart_rpc(task,
d61e612a 3919 calldata->server->nfs_client);
faf5f49c 3920 }
faf5f49c
TM		 3921}
3922
4ce70ada 3923static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3924{
4ce70ada 3925 struct nfs4_unlockdata *calldata = data;
faf5f49c 3926
911d1aaf 3927 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3928 return;
3929 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3930 /* Note: exit _without_ running nfs4_locku_done */
3931 task->tk_action = NULL;
faf5f49c
TM		 3932 return;
3933 }
26e976a8 3934 calldata->timestamp = jiffies;
035168ab 3935 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3936 &calldata->arg.seq_args,
3937 &calldata->res.seq_res, 1, task))
3938 return;
5138fde0 3939 rpc_call_start(task);
faf5f49c
TM		 3940}
3941
963d8fe5 3942static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3943 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3944 .rpc_call_done = nfs4_locku_done,
06f814a3 3945 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3946};
3947
a5d16a4d
TM		 3948static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3949 struct nfs_open_context *ctx,
3950 struct nfs4_lock_state *lsp,
3951 struct nfs_seqid *seqid)
3952{
3953 struct nfs4_unlockdata *data;
5138fde0
TM		 3954 struct rpc_message msg = {
3955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3956 .rpc_cred = ctx->cred,
3957 };
c970aa85
TM		 3958 struct rpc_task_setup task_setup_data = {
3959 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3960 .rpc_message = &msg,
c970aa85 3961 .callback_ops = &nfs4_locku_ops,
101070ca 3962 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3963 .flags = RPC_TASK_ASYNC,
3964 };
a5d16a4d 3965
137d6aca
FF		 3966 /* Ensure this is an unlock - when canceling a lock, the
3967 * canceled lock is passed in, and it won't be an unlock.
3968 */
3969 fl->fl_type = F_UNLCK;
3970
a5d16a4d
TM		 3971 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3972 if (data == NULL) {
3973 nfs_free_seqid(seqid);
3974 return ERR_PTR(-ENOMEM);
3975 }
3976
5138fde0
TM		 3977 msg.rpc_argp = &data->arg,
3978 msg.rpc_resp = &data->res,
c970aa85
TM		 3979 task_setup_data.callback_data = data;
3980 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3981}
3982
faf5f49c
TM		 3983static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3984{
19e03c57 3985 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3986 struct nfs_seqid *seqid;
1da177e4 3987 struct nfs4_lock_state *lsp;
06f814a3
TM		 3988 struct rpc_task *task;
3989 int status = 0;
536ff0f8 3990 unsigned char fl_flags = request->fl_flags;
faf5f49c 3991
8d0a8a9d 3992 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3993 /* Unlock _before_ we do the RPC call */
3994 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3995 down_read(&nfsi->rwsem);
3996 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3997 up_read(&nfsi->rwsem);
9b073574 3998 goto out;
19e03c57
TM		 3999 }
4000 up_read(&nfsi->rwsem);
8d0a8a9d 4001 if (status != 0)
9b073574
TM		 4002 goto out;
4003 /* Is this a delegated lock? */
4004 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4005 goto out;
8d0a8a9d 4006 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4007 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4008 status = -ENOMEM;
911d1aaf 4009 if (seqid == NULL)
9b073574 4010 goto out;
cd3758e3 4011 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4012 status = PTR_ERR(task);
4013 if (IS_ERR(task))
9b073574 4014 goto out;
a5d16a4d 4015 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4016 rpc_put_task(task);
9b073574 4017out:
536ff0f8 4018 request->fl_flags = fl_flags;
1da177e4
LT		 4019 return status;
4020}
4021
a5d16a4d
TM		 4022struct nfs4_lockdata {
4023 struct nfs_lock_args arg;
4024 struct nfs_lock_res res;
4025 struct nfs4_lock_state *lsp;
4026 struct nfs_open_context *ctx;
4027 struct file_lock fl;
26e976a8 4028 unsigned long timestamp;
a5d16a4d
TM		 4029 int rpc_status;
4030 int cancelled;
66179efe 4031 struct nfs_server *server;
a5d16a4d
TM		 4032};
4033
4034static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4035 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4036 gfp_t gfp_mask)
1da177e4 4037{
a5d16a4d
TM		 4038 struct nfs4_lockdata *p;
4039 struct inode *inode = lsp->ls_state->inode;
1da177e4 4040 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4041
8535b2be 4042 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4043 if (p == NULL)
4044 return NULL;
4045
4046 p->arg.fh = NFS_FH(inode);
4047 p->arg.fl = &p->fl;
8535b2be 4048 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4049 if (p->arg.open_seqid == NULL)
4050 goto out_free;
8535b2be 4051 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4052 if (p->arg.lock_seqid == NULL)
2f74c0a0 4053 goto out_free_seqid;
a5d16a4d 4054 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4055 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4056 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 4057 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 4058 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 4059 p->lsp = lsp;
66179efe 4060 p->server = server;
a5d16a4d
TM		 4061 atomic_inc(&lsp->ls_count);
4062 p->ctx = get_nfs_open_context(ctx);
4063 memcpy(&p->fl, fl, sizeof(p->fl));
4064 return p;
2f74c0a0
TM		 4065out_free_seqid:
4066 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4067out_free:
4068 kfree(p);
4069 return NULL;
4070}
4071
4072static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4073{
4074 struct nfs4_lockdata *data = calldata;
4075 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4076
3110ff80 4077 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4078 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4079 return;
a5d16a4d
TM		 4080 /* Do we need to do an open_to_lock_owner? */
4081 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4082 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4083 return;
a5d16a4d
TM		 4084 data->arg.open_stateid = &state->stateid;
4085 data->arg.new_lock_owner = 1;
c1d51931 4086 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4087 } else
4088 data->arg.new_lock_owner = 0;
26e976a8 4089 data->timestamp = jiffies;
035168ab
TM		 4090 if (nfs4_setup_sequence(data->server,
4091 &data->arg.seq_args,
66179efe
AA		 4092 &data->res.seq_res, 1, task))
4093 return;
5138fde0 4094 rpc_call_start(task);
3110ff80 4095 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4096}
4097
b257957e
AB		 4098static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4099{
4100 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4101 nfs4_lock_prepare(task, calldata);
4102}
4103
a5d16a4d
TM		 4104static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4105{
4106 struct nfs4_lockdata *data = calldata;
4107
3110ff80 4108 dprintk("%s: begin!\n", __func__);
a5d16a4d 4109
14516c3a
TM		 4110 if (!nfs4_sequence_done(task, &data->res.seq_res))
4111 return;
66179efe 4112
a5d16a4d 4113 data->rpc_status = task->tk_status;
a5d16a4d 4114 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4115 if (data->rpc_status == 0)
4116 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4117 else
4118 goto out;
4119 }
4120 if (data->rpc_status == 0) {
4121 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4122 sizeof(data->lsp->ls_stateid.data));
4123 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4124 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4125 }
a5d16a4d 4126out:
3110ff80 4127 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4128}
4129
4130static void nfs4_lock_release(void *calldata)
4131{
4132 struct nfs4_lockdata *data = calldata;
4133
3110ff80 4134 dprintk("%s: begin!\n", __func__);
2f74c0a0 4135 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4136 if (data->cancelled != 0) {
4137 struct rpc_task *task;
4138 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4139 data->arg.lock_seqid);
4140 if (!IS_ERR(task))
e6b3c4db 4141 rpc_put_task(task);
3110ff80 4142 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4143 } else
4144 nfs_free_seqid(data->arg.lock_seqid);
4145 nfs4_put_lock_state(data->lsp);
4146 put_nfs_open_context(data->ctx);
4147 kfree(data);
3110ff80 4148 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4149}
4150
4151static const struct rpc_call_ops nfs4_lock_ops = {
4152 .rpc_call_prepare = nfs4_lock_prepare,
4153 .rpc_call_done = nfs4_lock_done,
4154 .rpc_release = nfs4_lock_release,
4155};
4156
b257957e
AB		 4157static const struct rpc_call_ops nfs4_recover_lock_ops = {
4158 .rpc_call_prepare = nfs4_recover_lock_prepare,
4159 .rpc_call_done = nfs4_lock_done,
4160 .rpc_release = nfs4_lock_release,
4161};
4162
2bee72a6
TM		 4163static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4164{
4165 struct nfs_client *clp = server->nfs_client;
4166 struct nfs4_state *state = lsp->ls_state;
4167
4168 switch (error) {
4169 case -NFS4ERR_ADMIN_REVOKED:
4170 case -NFS4ERR_BAD_STATEID:
4171 case -NFS4ERR_EXPIRED:
4172 if (new_lock_owner != 0 ||
4173 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4174 nfs4_state_mark_reclaim_nograce(clp, state);
4175 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4176 break;
4177 case -NFS4ERR_STALE_STATEID:
4178 if (new_lock_owner != 0 ||
4179 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4180 nfs4_state_mark_reclaim_reboot(clp, state);
4181 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4182 };
4183}
4184
afe6c27c 4185static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4186{
4187 struct nfs4_lockdata *data;
4188 struct rpc_task *task;
5138fde0
TM		 4189 struct rpc_message msg = {
4190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4191 .rpc_cred = state->owner->so_cred,
4192 };
c970aa85
TM		 4193 struct rpc_task_setup task_setup_data = {
4194 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4195 .rpc_message = &msg,
c970aa85 4196 .callback_ops = &nfs4_lock_ops,
101070ca 4197 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4198 .flags = RPC_TASK_ASYNC,
4199 };
a5d16a4d
TM		 4200 int ret;
4201
3110ff80 4202 dprintk("%s: begin!\n", __func__);
cd3758e3 4203 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4204 fl->fl_u.nfs4_fl.owner,
4205 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4206 if (data == NULL)
4207 return -ENOMEM;
4208 if (IS_SETLKW(cmd))
4209 data->arg.block = 1;
b257957e
AB		 4210 if (recovery_type > NFS_LOCK_NEW) {
4211 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4212 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4213 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4214 }
5138fde0
TM		 4215 msg.rpc_argp = &data->arg,
4216 msg.rpc_resp = &data->res,
c970aa85
TM		 4217 task_setup_data.callback_data = data;
4218 task = rpc_run_task(&task_setup_data);
7a1218a2 4219 if (IS_ERR(task))
a5d16a4d 4220 return PTR_ERR(task);
a5d16a4d
TM		 4221 ret = nfs4_wait_for_completion_rpc_task(task);
4222 if (ret == 0) {
4223 ret = data->rpc_status;
2bee72a6
TM		 4224 if (ret)
4225 nfs4_handle_setlk_error(data->server, data->lsp,
4226 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4227 } else
4228 data->cancelled = 1;
e6b3c4db 4229 rpc_put_task(task);
3110ff80 4230 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4231 return ret;
1da177e4
LT		 4232}
4233
4234static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4235{
202b50dc
TM		 4236 struct nfs_server *server = NFS_SERVER(state->inode);
4237 struct nfs4_exception exception = { };
4238 int err;
4239
4240 do {
42a2d13e
TM		 4241 /* Cache the lock if possible... */
4242 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4243 return 0;
afe6c27c 4244 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4245 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4246 break;
4247 nfs4_handle_exception(server, err, &exception);
4248 } while (exception.retry);
4249 return err;
1da177e4
LT		 4250}
4251
4252static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4253{
202b50dc
TM		 4254 struct nfs_server *server = NFS_SERVER(state->inode);
4255 struct nfs4_exception exception = { };
4256 int err;
4257
6bfc93ef
TM		 4258 err = nfs4_set_lock_state(state, request);
4259 if (err != 0)
4260 return err;
202b50dc 4261 do {
42a2d13e
TM		 4262 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4263 return 0;
afe6c27c 4264 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4265 switch (err) {
4266 default:
4267 goto out;
4268 case -NFS4ERR_GRACE:
4269 case -NFS4ERR_DELAY:
2c643488 4270 case -EKEYEXPIRED:
a9ed2e25
TM		 4271 nfs4_handle_exception(server, err, &exception);
4272 err = 0;
4273 }
202b50dc 4274 } while (exception.retry);
a9ed2e25 4275out:
202b50dc 4276 return err;
1da177e4
LT		 4277}
4278
4279static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4280{
19e03c57 4281 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4282 unsigned char fl_flags = request->fl_flags;
8e469ebd 4283 int status = -ENOLCK;
1da177e4 4284
8e469ebd
TM		 4285 if ((fl_flags & FL_POSIX) &&
4286 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4287 goto out;
6bfc93ef 4288 /* Is this a delegated open? */
6bfc93ef
TM		 4289 status = nfs4_set_lock_state(state, request);
4290 if (status != 0)
4291 goto out;
01c3b861
TM		 4292 request->fl_flags |= FL_ACCESS;
4293 status = do_vfs_lock(request->fl_file, request);
4294 if (status < 0)
4295 goto out;
19e03c57 4296 down_read(&nfsi->rwsem);
01c3b861 4297 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4298 /* Yes: cache locks! */
01c3b861 4299 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4300 request->fl_flags = fl_flags & ~FL_SLEEP;
4301 status = do_vfs_lock(request->fl_file, request);
4302 goto out_unlock;
01c3b861 4303 }
afe6c27c 4304 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4305 if (status != 0)
01c3b861 4306 goto out_unlock;
6bfc93ef 4307 /* Note: we always want to sleep here! */
01c3b861 4308 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4309 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4310 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4311out_unlock:
19e03c57 4312 up_read(&nfsi->rwsem);
01c3b861
TM		 4313out:
4314 request->fl_flags = fl_flags;
1da177e4
LT		 4315 return status;
4316}
4317
4318static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4319{
4320 struct nfs4_exception exception = { };
4321 int err;
4322
4323 do {
965b5d67
TM		 4324 err = _nfs4_proc_setlk(state, cmd, request);
4325 if (err == -NFS4ERR_DENIED)
4326 err = -EAGAIN;
1da177e4 4327 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4328 err, &exception);
1da177e4
LT		 4329 } while (exception.retry);
4330 return err;
4331}
4332
4333static int
4334nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4335{
4336 struct nfs_open_context *ctx;
4337 struct nfs4_state *state;
4338 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4339 int status;
4340
4341 /* verify open state */
cd3758e3 4342 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4343 state = ctx->state;
4344
4345 if (request->fl_start < 0 || request->fl_end < 0)
4346 return -EINVAL;
4347
d953126a
TM		 4348 if (IS_GETLK(cmd)) {
4349 if (state != NULL)
4350 return nfs4_proc_getlk(state, F_GETLK, request);
4351 return 0;
4352 }
1da177e4
LT		 4353
4354 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4355 return -EINVAL;
4356
d953126a
TM		 4357 if (request->fl_type == F_UNLCK) {
4358 if (state != NULL)
4359 return nfs4_proc_unlck(state, cmd, request);
4360 return 0;
4361 }
1da177e4 4362
d953126a
TM		 4363 if (state == NULL)
4364 return -ENOLCK;
1da177e4
LT		 4365 do {
4366 status = nfs4_proc_setlk(state, cmd, request);
4367 if ((status != -EAGAIN) || IS_SETLK(cmd))
4368 break;
4369 timeout = nfs4_set_lock_task_retry(timeout);
4370 status = -ERESTARTSYS;
4371 if (signalled())
4372 break;
4373 } while(status < 0);
1da177e4
LT		 4374 return status;
4375}
4376
888e694c
TM		 4377int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4378{
4379 struct nfs_server *server = NFS_SERVER(state->inode);
4380 struct nfs4_exception exception = { };
4381 int err;
4382
4383 err = nfs4_set_lock_state(state, fl);
4384 if (err != 0)
4385 goto out;
4386 do {
afe6c27c 4387 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4388 switch (err) {
4389 default:
4390 printk(KERN_ERR "%s: unhandled error %d.\n",
4391 __func__, err);
4392 case 0:
965b5d67 4393 case -ESTALE:
d5122201
TM		 4394 goto out;
4395 case -NFS4ERR_EXPIRED:
4396 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4397 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4398 case -NFS4ERR_BADSESSION:
4399 case -NFS4ERR_BADSLOT:
4400 case -NFS4ERR_BAD_HIGH_SLOT:
4401 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4402 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4403 nfs4_schedule_state_recovery(server->nfs_client);
4404 goto out;
965b5d67
TM		 4405 case -ERESTARTSYS:
4406 /*
4407 * The show must go on: exit, but mark the
4408 * stateid as needing recovery.
4409 */
4410 case -NFS4ERR_ADMIN_REVOKED:
4411 case -NFS4ERR_BAD_STATEID:
4412 case -NFS4ERR_OPENMODE:
4413 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4414 err = 0;
4415 goto out;
4416 case -ENOMEM:
4417 case -NFS4ERR_DENIED:
4418 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4419 err = 0;
4420 goto out;
d5122201 4421 case -NFS4ERR_DELAY:
2c643488 4422 case -EKEYEXPIRED:
d5122201
TM		 4423 break;
4424 }
888e694c
TM		 4425 err = nfs4_handle_exception(server, err, &exception);
4426 } while (exception.retry);
4427out:
4428 return err;
4429}
6b3b5496 4430
d3c7b7cc
TM		 4431static void nfs4_release_lockowner_release(void *calldata)
4432{
4433 kfree(calldata);
4434}
4435
4436const struct rpc_call_ops nfs4_release_lockowner_ops = {
4437 .rpc_release = nfs4_release_lockowner_release,
4438};
4439
4440void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4441{
4442 struct nfs_server *server = lsp->ls_state->owner->so_server;
4443 struct nfs_release_lockowner_args *args;
4444 struct rpc_message msg = {
4445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4446 };
4447
4448 if (server->nfs_client->cl_mvops->minor_version != 0)
4449 return;
4450 args = kmalloc(sizeof(*args), GFP_NOFS);
4451 if (!args)
4452 return;
4453 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4454 args->lock_owner.id = lsp->ls_id.id;
4455 msg.rpc_argp = args;
4456 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4457}
4458
aa1870af
BF		 4459#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4460
6b3b5496
BF		 4461int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4462 size_t buflen, int flags)
4463{
4b580ee3
BF		 4464 struct inode *inode = dentry->d_inode;
4465
4466 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4467 return -EOPNOTSUPP;
4468
4b580ee3 4469 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4470}
4471
4472/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4473 * and that's what we'll do for e.g. user attributes that haven't been set.
4474 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4475 * attributes in kernel-managed attribute namespaces. */
4476ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4477 size_t buflen)
4478{
aa1870af
BF		 4479 struct inode *inode = dentry->d_inode;
4480
4481 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4482 return -EOPNOTSUPP;
4483
4484 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4485}
4486
4487ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4488{
aa1870af 4489 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4490
096455a2
BF		 4491 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4492 return 0;
6b3b5496
BF		 4493 if (buf && buflen < len)
4494 return -ERANGE;
4495 if (buf)
aa1870af
BF		 4496 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4497 return len;
6b3b5496
BF		 4498}
4499
69aaaae1
TM		 4500static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4501{
4502 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4503 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4504 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4505 return;
4506
4507 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4508 NFS_ATTR_FATTR_NLINK;
4509 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4510 fattr->nlink = 2;
4511}
4512
56659e99 4513int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4514 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4515{
4516 struct nfs_server *server = NFS_SERVER(dir);
4517 u32 bitmask[2] = {
361e624f
MN		 4518 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4519 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4520 };
4521 struct nfs4_fs_locations_arg args = {
4522 .dir_fh = NFS_FH(dir),
c228fd3a 4523 .name = name,
683b57b4
TM		 4524 .page = page,
4525 .bitmask = bitmask,
4526 };
22958463
BH		 4527 struct nfs4_fs_locations_res res = {
4528 .fs_locations = fs_locations,
4529 };
683b57b4
TM		 4530 struct rpc_message msg = {
4531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4532 .rpc_argp = &args,
22958463 4533 .rpc_resp = &res,
683b57b4
TM		 4534 };
4535 int status;
4536
3110ff80 4537 dprintk("%s: start\n", __func__);
c228fd3a 4538 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4539 fs_locations->server = server;
830b8e33 4540 fs_locations->nlocations = 0;
cccef3b9 4541 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4542 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4543 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4544 return status;
4545}
4546
557134a3 4547#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4548/*
4549 * nfs4_proc_exchange_id()
4550 *
4551 * Since the clientid has expired, all compounds using sessions
4552 * associated with the stale clientid will be returning
4553 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4554 * be in some phase of session reset.
4555 */
4d643d1d 4556int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4557{
4558 nfs4_verifier verifier;
4559 struct nfs41_exchange_id_args args = {
4560 .client = clp,
4561 .flags = clp->cl_exchange_flags,
4562 };
4563 struct nfs41_exchange_id_res res = {
4564 .client = clp,
4565 };
4566 int status;
4567 struct rpc_message msg = {
4568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4569 .rpc_argp = &args,
4570 .rpc_resp = &res,
4571 .rpc_cred = cred,
4572 };
4573 __be32 *p;
4574
4575 dprintk("--> %s\n", __func__);
4576 BUG_ON(clp == NULL);
a7b72103 4577
7b183d0d
AB		 4578 /* Remove server-only flags */
4579 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4580
99fe60d0
BH		 4581 p = (u32 *)verifier.data;
4582 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4583 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4584 args.verifier = &verifier;
4585
4586 while (1) {
4587 args.id_len = scnprintf(args.id, sizeof(args.id),
4588 "%s/%s %u",
4589 clp->cl_ipaddr,
4590 rpc_peeraddr2str(clp->cl_rpcclient,
4591 RPC_DISPLAY_ADDR),
4592 clp->cl_id_uniquifier);
4593
4594 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4595
180b62a3 4596 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4597 break;
4598
4599 if (signalled())
4600 break;
4601
4602 if (++clp->cl_id_uniquifier == 0)
4603 break;
4604 }
4605
4606 dprintk("<-- %s status= %d\n", __func__, status);
4607 return status;
4608}
4609
2050f0cc
AA		 4610struct nfs4_get_lease_time_data {
4611 struct nfs4_get_lease_time_args *args;
4612 struct nfs4_get_lease_time_res *res;
4613 struct nfs_client *clp;
4614};
4615
4616static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4617 void *calldata)
4618{
4619 int ret;
4620 struct nfs4_get_lease_time_data *data =
4621 (struct nfs4_get_lease_time_data *)calldata;
4622
4623 dprintk("--> %s\n", __func__);
689cf5c1 4624 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4625 /* just setup sequence, do not trigger session recovery
4626 since we're invoked within one */
4627 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4628 &data->args->la_seq_args,
4629 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4630
4631 BUG_ON(ret == -EAGAIN);
4632 rpc_call_start(task);
4633 dprintk("<-- %s\n", __func__);
4634}
4635
4636/*
4637 * Called from nfs4_state_manager thread for session setup, so don't recover
4638 * from sequence operation or clientid errors.
4639 */
4640static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4641{
4642 struct nfs4_get_lease_time_data *data =
4643 (struct nfs4_get_lease_time_data *)calldata;
4644
4645 dprintk("--> %s\n", __func__);
14516c3a
TM		 4646 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4647 return;
2050f0cc
AA		 4648 switch (task->tk_status) {
4649 case -NFS4ERR_DELAY:
4650 case -NFS4ERR_GRACE:
2c643488 4651 case -EKEYEXPIRED:
2050f0cc
AA		 4652 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4653 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4654 task->tk_status = 0;
0110ee15 4655 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4656 return;
4657 }
2050f0cc
AA		 4658 dprintk("<-- %s\n", __func__);
4659}
4660
4661struct rpc_call_ops nfs4_get_lease_time_ops = {
4662 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4663 .rpc_call_done = nfs4_get_lease_time_done,
4664};
4665
4666int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4667{
4668 struct rpc_task *task;
4669 struct nfs4_get_lease_time_args args;
4670 struct nfs4_get_lease_time_res res = {
4671 .lr_fsinfo = fsinfo,
4672 };
4673 struct nfs4_get_lease_time_data data = {
4674 .args = &args,
4675 .res = &res,
4676 .clp = clp,
4677 };
4678 struct rpc_message msg = {
4679 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4680 .rpc_argp = &args,
4681 .rpc_resp = &res,
4682 };
4683 struct rpc_task_setup task_setup = {
4684 .rpc_client = clp->cl_rpcclient,
4685 .rpc_message = &msg,
4686 .callback_ops = &nfs4_get_lease_time_ops,
4687 .callback_data = &data
4688 };
4689 int status;
4690
4691 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4692 dprintk("--> %s\n", __func__);
4693 task = rpc_run_task(&task_setup);
4694
4695 if (IS_ERR(task))
4696 status = PTR_ERR(task);
4697 else {
4698 status = task->tk_status;
4699 rpc_put_task(task);
4700 }
4701 dprintk("<-- %s return %d\n", __func__, status);
4702
4703 return status;
4704}
4705
b73dafa7
RL		 4706/*
4707 * Reset a slot table
4708 */
104aeba4
AA		 4709static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4710 int ivalue)
ac72b7b3 4711{
104aeba4 4712 struct nfs4_slot *new = NULL;
b73dafa7 4713 int i;
ac72b7b3
AA		 4714 int ret = 0;
4715
104aeba4
AA		 4716 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4717 max_reqs, tbl->max_slots);
ac72b7b3 4718
104aeba4
AA		 4719 /* Does the newly negotiated max_reqs match the existing slot table? */
4720 if (max_reqs != tbl->max_slots) {
4721 ret = -ENOMEM;
4722 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4723 GFP_NOFS);
104aeba4
AA		 4724 if (!new)
4725 goto out;
4726 ret = 0;
4727 kfree(tbl->slots);
ac72b7b3
AA		 4728 }
4729 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4730 if (new) {
4731 tbl->slots = new;
4732 tbl->max_slots = max_reqs;
4733 }
4734 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4735 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4736 spin_unlock(&tbl->slot_tbl_lock);
4737 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4738 tbl, tbl->slots, tbl->max_slots);
4739out:
4740 dprintk("<-- %s: return %d\n", __func__, ret);
4741 return ret;
4742}
4743
b73dafa7
RL		 4744/*
4745 * Reset the forechannel and backchannel slot tables
4746 */
4747static int nfs4_reset_slot_tables(struct nfs4_session *session)
4748{
4749 int status;
4750
4751 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4752 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4753 if (status)
4754 return status;
4755
4756 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4757 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4758 return status;
4759}
4760
f8625a6a
RL		 4761/* Destroy the slot table */
4762static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4763{
4764 if (session->fc_slot_table.slots != NULL) {
4765 kfree(session->fc_slot_table.slots);
4766 session->fc_slot_table.slots = NULL;
4767 }
4768 if (session->bc_slot_table.slots != NULL) {
4769 kfree(session->bc_slot_table.slots);
4770 session->bc_slot_table.slots = NULL;
4771 }
4772 return;
4773}
4774
fc931582
AA		 4775/*
4776 * Initialize slot table
4777 */
050047ce
RL		 4778static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4779 int max_slots, int ivalue)
fc931582 4780{
fc931582
AA		 4781 struct nfs4_slot *slot;
4782 int ret = -ENOMEM;
4783
4784 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4785
050047ce 4786 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4787
8535b2be 4788 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4789 if (!slot)
4790 goto out;
fc931582
AA		 4791 ret = 0;
4792
4793 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4794 tbl->max_slots = max_slots;
4795 tbl->slots = slot;
4796 tbl->highest_used_slotid = -1; /* no slot is currently used */
4797 spin_unlock(&tbl->slot_tbl_lock);
4798 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4799 tbl, tbl->slots, tbl->max_slots);
4800out:
4801 dprintk("<-- %s: return %d\n", __func__, ret);
4802 return ret;
fc931582
AA		 4803}
4804
050047ce
RL		 4805/*
4806 * Initialize the forechannel and backchannel tables
4807 */
4808static int nfs4_init_slot_tables(struct nfs4_session *session)
4809{
f26468fb
TM		 4810 struct nfs4_slot_table *tbl;
4811 int status = 0;
050047ce 4812
f26468fb
TM		 4813 tbl = &session->fc_slot_table;
4814 if (tbl->slots == NULL) {
4815 status = nfs4_init_slot_table(tbl,
4816 session->fc_attrs.max_reqs, 1);
4817 if (status)
4818 return status;
4819 }
050047ce 4820
f26468fb
TM		 4821 tbl = &session->bc_slot_table;
4822 if (tbl->slots == NULL) {
4823 status = nfs4_init_slot_table(tbl,
4824 session->bc_attrs.max_reqs, 0);
4825 if (status)
4826 nfs4_destroy_slot_tables(session);
4827 }
f8625a6a
RL		 4828
4829 return status;
557134a3
AA		 4830}
4831
4832struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4833{
4834 struct nfs4_session *session;
4835 struct nfs4_slot_table *tbl;
4836
8535b2be 4837 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4838 if (!session)
4839 return NULL;
76db6d95 4840
ea028ac9 4841 init_completion(&session->complete);
76db6d95 4842
557134a3 4843 tbl = &session->fc_slot_table;
9dfdf404 4844 tbl->highest_used_slotid = -1;
557134a3 4845 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4846 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4847
4848 tbl = &session->bc_slot_table;
9dfdf404 4849 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4850 spin_lock_init(&tbl->slot_tbl_lock);
4851 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4852
1055d76d
TM		 4853 session->session_state = 1<<NFS4_SESSION_INITING;
4854
557134a3
AA		 4855 session->clp = clp;
4856 return session;
4857}
4858
4859void nfs4_destroy_session(struct nfs4_session *session)
4860{
5a0ffe54
AA		 4861 nfs4_proc_destroy_session(session);
4862 dprintk("%s Destroy backchannel for xprt %p\n",
4863 __func__, session->clp->cl_rpcclient->cl_xprt);
4864 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4865 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4866 nfs4_destroy_slot_tables(session);
557134a3
AA		 4867 kfree(session);
4868}
4869
fc931582
AA		 4870/*
4871 * Initialize the values to be used by the client in CREATE_SESSION
4872 * If nfs4_init_session set the fore channel request and response sizes,
4873 * use them.
4874 *
4875 * Set the back channel max_resp_sz_cached to zero to force the client to
4876 * always set csa_cachethis to FALSE because the current implementation
4877 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4878 */
4879static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4880{
4881 struct nfs4_session *session = args->client->cl_session;
4882 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4883 mxresp_sz = session->fc_attrs.max_resp_sz;
4884
4885 if (mxrqst_sz == 0)
4886 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4887 if (mxresp_sz == 0)
4888 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4889 /* Fore channel attributes */
4890 args->fc_attrs.headerpadsz = 0;
4891 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4892 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4893 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4894 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4895
4896 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4897 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4898 __func__,
4899 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4900 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4901
4902 /* Back channel attributes */
4903 args->bc_attrs.headerpadsz = 0;
4904 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4905 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4906 args->bc_attrs.max_resp_sz_cached = 0;
4907 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4908 args->bc_attrs.max_reqs = 1;
4909
4910 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4911 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4912 __func__,
4913 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4914 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4915 args->bc_attrs.max_reqs);
4916}
4917
8d35301d
AA		 4918static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4919{
4920 if (rcvd <= sent)
4921 return 0;
4922 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4923 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4924 return -EINVAL;
4925}
4926
4927#define _verify_fore_channel_attr(_name_) \
4928 _verify_channel_attr("fore", #_name_, \
4929 args->fc_attrs._name_, \
4930 session->fc_attrs._name_)
4931
4932#define _verify_back_channel_attr(_name_) \
4933 _verify_channel_attr("back", #_name_, \
4934 args->bc_attrs._name_, \
4935 session->bc_attrs._name_)
4936
4937/*
4938 * The server is not allowed to increase the fore channel header pad size,
4939 * maximum response size, or maximum number of operations.
4940 *
4941 * The back channel attributes are only negotiatied down: We send what the
4942 * (back channel) server insists upon.
4943 */
4944static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4945 struct nfs4_session *session)
4946{
4947 int ret = 0;
4948
4949 ret |= _verify_fore_channel_attr(headerpadsz);
4950 ret |= _verify_fore_channel_attr(max_resp_sz);
4951 ret |= _verify_fore_channel_attr(max_ops);
4952
4953 ret |= _verify_back_channel_attr(headerpadsz);
4954 ret |= _verify_back_channel_attr(max_rqst_sz);
4955 ret |= _verify_back_channel_attr(max_resp_sz);
4956 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4957 ret |= _verify_back_channel_attr(max_ops);
4958 ret |= _verify_back_channel_attr(max_reqs);
4959
4960 return ret;
4961}
4962
fc931582
AA		 4963static int _nfs4_proc_create_session(struct nfs_client *clp)
4964{
4965 struct nfs4_session *session = clp->cl_session;
4966 struct nfs41_create_session_args args = {
4967 .client = clp,
4968 .cb_program = NFS4_CALLBACK,
4969 };
4970 struct nfs41_create_session_res res = {
4971 .client = clp,
4972 };
4973 struct rpc_message msg = {
4974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4975 .rpc_argp = &args,
4976 .rpc_resp = &res,
4977 };
4978 int status;
4979
4980 nfs4_init_channel_attrs(&args);
0f91421e 4981 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4982
4983 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4984
8d35301d
AA		 4985 if (!status)
4986 /* Verify the session's negotiated channel_attrs values */
4987 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4988 if (!status) {
4989 /* Increment the clientid slot sequence id */
4990 clp->cl_seqid++;
4991 }
4992
4993 return status;
4994}
4995
4996/*
4997 * Issues a CREATE_SESSION operation to the server.
4998 * It is the responsibility of the caller to verify the session is
4999 * expired before calling this routine.
5000 */
f26468fb 5001int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5002{
5003 int status;
5004 unsigned *ptr;
fc931582
AA		 5005 struct nfs4_session *session = clp->cl_session;
5006
5007 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5008
5009 status = _nfs4_proc_create_session(clp);
5010 if (status)
5011 goto out;
5012
f26468fb
TM		 5013 /* Init and reset the fore channel */
5014 status = nfs4_init_slot_tables(session);
5015 dprintk("slot table initialization returned %d\n", status);
5016 if (status)
5017 goto out;
5018 status = nfs4_reset_slot_tables(session);
5019 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5020 if (status)
5021 goto out;
5022
5023 ptr = (unsigned *)&session->sess_id.data[0];
5024 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5025 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5026out:
5027 dprintk("<-- %s\n", __func__);
5028 return status;
5029}
5030
0f3e66c6
AA		 5031/*
5032 * Issue the over-the-wire RPC DESTROY_SESSION.
5033 * The caller must serialize access to this routine.
5034 */
5035int nfs4_proc_destroy_session(struct nfs4_session *session)
5036{
5037 int status = 0;
5038 struct rpc_message msg;
5039
5040 dprintk("--> nfs4_proc_destroy_session\n");
5041
5042 /* session is still being setup */
5043 if (session->clp->cl_cons_state != NFS_CS_READY)
5044 return status;
5045
5046 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5047 msg.rpc_argp = session;
5048 msg.rpc_resp = NULL;
5049 msg.rpc_cred = NULL;
5050 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5051
5052 if (status)
5053 printk(KERN_WARNING
5054 "Got error %d from the server on DESTROY_SESSION. "
5055 "Session has been destroyed regardless...\n", status);
5056
5057 dprintk("<-- nfs4_proc_destroy_session\n");
5058 return status;
5059}
5060
fccba804
TM		 5061int nfs4_init_session(struct nfs_server *server)
5062{
5063 struct nfs_client *clp = server->nfs_client;
2449ea2e 5064 struct nfs4_session *session;
68bf05ef 5065 unsigned int rsize, wsize;
fccba804
TM		 5066 int ret;
5067
5068 if (!nfs4_has_session(clp))
5069 return 0;
5070
1055d76d
TM		 5071 session = clp->cl_session;
5072 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5073 return 0;
5074
68bf05ef
AA		 5075 rsize = server->rsize;
5076 if (rsize == 0)
5077 rsize = NFS_MAX_FILE_IO_SIZE;
5078 wsize = server->wsize;
5079 if (wsize == 0)
5080 wsize = NFS_MAX_FILE_IO_SIZE;
5081
68bf05ef
AA		 5082 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5083 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5084
fccba804
TM		 5085 ret = nfs4_recover_expired_lease(server);
5086 if (!ret)
5087 ret = nfs4_check_client_ready(clp);
5088 return ret;
5089}
5090
fc01cea9
AA		 5091/*
5092 * Renew the cl_session lease.
5093 */
d5f8d3fe
TM		 5094struct nfs4_sequence_data {
5095 struct nfs_client *clp;
5096 struct nfs4_sequence_args args;
5097 struct nfs4_sequence_res res;
5098};
5099
dc96aef9
AB		 5100static void nfs41_sequence_release(void *data)
5101{
d5f8d3fe
TM		 5102 struct nfs4_sequence_data *calldata = data;
5103 struct nfs_client *clp = calldata->clp;
dc96aef9 5104
7135840f
AB		 5105 if (atomic_read(&clp->cl_count) > 1)
5106 nfs4_schedule_state_renewal(clp);
5107 nfs_put_client(clp);
d5f8d3fe 5108 kfree(calldata);
dc96aef9
AB		 5109}
5110
aa5190d0
TM		 5111static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5112{
5113 switch(task->tk_status) {
5114 case -NFS4ERR_DELAY:
5115 case -EKEYEXPIRED:
5116 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5117 return -EAGAIN;
5118 default:
5119 nfs4_schedule_state_recovery(clp);
5120 }
5121 return 0;
5122}
5123
dc96aef9 5124static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5125{
d5f8d3fe
TM		 5126 struct nfs4_sequence_data *calldata = data;
5127 struct nfs_client *clp = calldata->clp;
fc01cea9 5128
14516c3a
TM		 5129 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5130 return;
fc01cea9
AA		 5131
5132 if (task->tk_status < 0) {
5133 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5134 if (atomic_read(&clp->cl_count) == 1)
5135 goto out;
fc01cea9 5136
aa5190d0
TM		 5137 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5138 rpc_restart_call_prepare(task);
fc01cea9
AA		 5139 return;
5140 }
5141 }
fc01cea9 5142 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5143out:
fc01cea9
AA		 5144 dprintk("<-- %s\n", __func__);
5145}
5146
5147static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5148{
d5f8d3fe
TM		 5149 struct nfs4_sequence_data *calldata = data;
5150 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5151 struct nfs4_sequence_args *args;
5152 struct nfs4_sequence_res *res;
5153
fc01cea9
AA		 5154 args = task->tk_msg.rpc_argp;
5155 res = task->tk_msg.rpc_resp;
5156
035168ab 5157 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5158 return;
5159 rpc_call_start(task);
5160}
5161
5162static const struct rpc_call_ops nfs41_sequence_ops = {
5163 .rpc_call_done = nfs41_sequence_call_done,
5164 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5165 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5166};
5167
71ac6da9 5168static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5169{
d5f8d3fe 5170 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5171 struct rpc_message msg = {
5172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5173 .rpc_cred = cred,
5174 };
71ac6da9
TM		 5175 struct rpc_task_setup task_setup_data = {
5176 .rpc_client = clp->cl_rpcclient,
5177 .rpc_message = &msg,
5178 .callback_ops = &nfs41_sequence_ops,
5179 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5180 };
fc01cea9 5181
7135840f 5182 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5183 return ERR_PTR(-EIO);
d5f8d3fe
TM		 5184 calldata = kmalloc(sizeof(*calldata), GFP_NOFS);
5185 if (calldata == NULL) {
7135840f 5186 nfs_put_client(clp);
71ac6da9 5187 return ERR_PTR(-ENOMEM);
fc01cea9 5188 }
d5f8d3fe
TM		 5189 calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5190 msg.rpc_argp = &calldata->args;
5191 msg.rpc_resp = &calldata->res;
5192 calldata->clp = clp;
71ac6da9 5193 task_setup_data.callback_data = calldata;
fc01cea9 5194
71ac6da9
TM		 5195 return rpc_run_task(&task_setup_data);
5196}
5197
5198static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5199{
5200 struct rpc_task *task;
5201 int ret = 0;
5202
5203 task = _nfs41_proc_sequence(clp, cred);
5204 if (IS_ERR(task))
5205 ret = PTR_ERR(task);
5206 else
5207 rpc_put_task(task);
5208 dprintk("<-- %s status=%d\n", __func__, ret);
5209 return ret;
5210}
5211
5212static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5213{
5214 struct rpc_task *task;
5215 int ret;
5216
5217 task = _nfs41_proc_sequence(clp, cred);
5218 if (IS_ERR(task)) {
5219 ret = PTR_ERR(task);
5220 goto out;
5221 }
5222 ret = rpc_wait_for_completion_task(task);
5223 if (!ret)
5224 ret = task->tk_status;
5225 rpc_put_task(task);
5226out:
5227 dprintk("<-- %s status=%d\n", __func__, ret);
5228 return ret;
fc01cea9
AA		 5229}
5230
fce5c838
RL		 5231struct nfs4_reclaim_complete_data {
5232 struct nfs_client *clp;
5233 struct nfs41_reclaim_complete_args arg;
5234 struct nfs41_reclaim_complete_res res;
5235};
5236
5237static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5238{
5239 struct nfs4_reclaim_complete_data *calldata = data;
5240
b257957e 5241 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5242 if (nfs41_setup_sequence(calldata->clp->cl_session,
5243 &calldata->arg.seq_args,
fce5c838
RL		 5244 &calldata->res.seq_res, 0, task))
5245 return;
5246
5247 rpc_call_start(task);
5248}
5249
aa5190d0
TM		 5250static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5251{
5252 switch(task->tk_status) {
5253 case 0:
5254 case -NFS4ERR_COMPLETE_ALREADY:
5255 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5256 break;
5257 case -NFS4ERR_DELAY:
5258 case -EKEYEXPIRED:
5259 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5260 return -EAGAIN;
5261 default:
5262 nfs4_schedule_state_recovery(clp);
5263 }
5264 return 0;
5265}
5266
fce5c838
RL		 5267static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5268{
5269 struct nfs4_reclaim_complete_data *calldata = data;
5270 struct nfs_client *clp = calldata->clp;
5271 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5272
5273 dprintk("--> %s\n", __func__);
14516c3a
TM		 5274 if (!nfs41_sequence_done(task, res))
5275 return;
fce5c838 5276
aa5190d0
TM		 5277 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5278 rpc_restart_call_prepare(task);
5279 return;
5280 }
fce5c838
RL		 5281 dprintk("<-- %s\n", __func__);
5282}
5283
5284static void nfs4_free_reclaim_complete_data(void *data)
5285{
5286 struct nfs4_reclaim_complete_data *calldata = data;
5287
5288 kfree(calldata);
5289}
5290
5291static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5292 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5293 .rpc_call_done = nfs4_reclaim_complete_done,
5294 .rpc_release = nfs4_free_reclaim_complete_data,
5295};
5296
5297/*
5298 * Issue a global reclaim complete.
5299 */
5300static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5301{
5302 struct nfs4_reclaim_complete_data *calldata;
5303 struct rpc_task *task;
5304 struct rpc_message msg = {
5305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5306 };
5307 struct rpc_task_setup task_setup_data = {
5308 .rpc_client = clp->cl_rpcclient,
5309 .rpc_message = &msg,
5310 .callback_ops = &nfs4_reclaim_complete_call_ops,
5311 .flags = RPC_TASK_ASYNC,
5312 };
5313 int status = -ENOMEM;
5314
5315 dprintk("--> %s\n", __func__);
8535b2be 5316 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5317 if (calldata == NULL)
5318 goto out;
5319 calldata->clp = clp;
5320 calldata->arg.one_fs = 0;
5321 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5322
5323 msg.rpc_argp = &calldata->arg;
5324 msg.rpc_resp = &calldata->res;
5325 task_setup_data.callback_data = calldata;
5326 task = rpc_run_task(&task_setup_data);
acf82b85 5327 if (IS_ERR(task)) {
fce5c838 5328 status = PTR_ERR(task);
acf82b85
DC		 5329 goto out;
5330 }
fce5c838 5331 rpc_put_task(task);
acf82b85 5332 return 0;
fce5c838
RL		 5333out:
5334 dprintk("<-- %s status=%d\n", __func__, status);
5335 return status;
5336}
557134a3
AA		 5337#endif /* CONFIG_NFS_V4_1 */
5338
591d71cb 5339struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5340 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5341 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5342 .recover_open = nfs4_open_reclaim,
5343 .recover_lock = nfs4_lock_reclaim,
591d71cb 5344 .establish_clid = nfs4_init_clientid,
90a16617 5345 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5346};
5347
591d71cb
AA		 5348#if defined(CONFIG_NFS_V4_1)
5349struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5350 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5351 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5352 .recover_open = nfs4_open_reclaim,
5353 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5354 .establish_clid = nfs41_init_clientid,
b4b82607 5355 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5356 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5357};
5358#endif /* CONFIG_NFS_V4_1 */
5359
5360struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5361 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5362 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5363 .recover_open = nfs4_open_expired,
5364 .recover_lock = nfs4_lock_expired,
5365 .establish_clid = nfs4_init_clientid,
90a16617 5366 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5367};
5368
5369#if defined(CONFIG_NFS_V4_1)
5370struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5371 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5372 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5373 .recover_open = nfs4_open_expired,
5374 .recover_lock = nfs4_lock_expired,
4d643d1d 5375 .establish_clid = nfs41_init_clientid,
b4b82607 5376 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5377};
591d71cb 5378#endif /* CONFIG_NFS_V4_1 */
1da177e4 5379
29fba38b
BH		 5380struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5381 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5382 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5383 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5384};
5385
5386#if defined(CONFIG_NFS_V4_1)
5387struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5388 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5389 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5390 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5391};
5392#endif
5393
97dc1359
TM		 5394static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5395 .minor_version = 0,
5396 .call_sync = _nfs4_call_sync,
e047a10c 5397 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5398 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5399 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5400 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5401};
5402
5403#if defined(CONFIG_NFS_V4_1)
5404static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5405 .minor_version = 1,
5406 .call_sync = _nfs4_call_sync_session,
e047a10c 5407 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5408 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5409 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5410 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5411};
5412#endif
5413
97dc1359
TM		 5414const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5415 [0] = &nfs_v4_0_minor_ops,
5416#if defined(CONFIG_NFS_V4_1)
5417 [1] = &nfs_v4_1_minor_ops,
5418#endif
5419};
5420
92e1d5be 5421static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5422 .permission = nfs_permission,
5423 .getattr = nfs_getattr,
5424 .setattr = nfs_setattr,
5425 .getxattr = nfs4_getxattr,
5426 .setxattr = nfs4_setxattr,
5427 .listxattr = nfs4_listxattr,
5428};
5429
509de811 5430const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5431 .version = 4, /* protocol version */
5432 .dentry_ops = &nfs4_dentry_operations,
5433 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5434 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5435 .getroot = nfs4_proc_get_root,
5436 .getattr = nfs4_proc_getattr,
5437 .setattr = nfs4_proc_setattr,
2b3de441 5438 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5439 .lookup = nfs4_proc_lookup,
5440 .access = nfs4_proc_access,
5441 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5442 .create = nfs4_proc_create,
5443 .remove = nfs4_proc_remove,
5444 .unlink_setup = nfs4_proc_unlink_setup,
5445 .unlink_done = nfs4_proc_unlink_done,
5446 .rename = nfs4_proc_rename,
5447 .link = nfs4_proc_link,
5448 .symlink = nfs4_proc_symlink,
5449 .mkdir = nfs4_proc_mkdir,
5450 .rmdir = nfs4_proc_remove,
5451 .readdir = nfs4_proc_readdir,
5452 .mknod = nfs4_proc_mknod,
5453 .statfs = nfs4_proc_statfs,
5454 .fsinfo = nfs4_proc_fsinfo,
5455 .pathconf = nfs4_proc_pathconf,
e9326dca 5456 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5457 .decode_dirent = nfs4_decode_dirent,
5458 .read_setup = nfs4_proc_read_setup,
ec06c096 5459 .read_done = nfs4_read_done,
1da177e4 5460 .write_setup = nfs4_proc_write_setup,
788e7a89 5461 .write_done = nfs4_write_done,
1da177e4 5462 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5463 .commit_done = nfs4_commit_done,
1da177e4 5464 .lock = nfs4_proc_lock,
e50a1c2e 5465 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5466 .close_context = nfs4_close_context,
1da177e4
LT		 5467};
5468
5469/*
5470 * Local variables:
5471 * c-basic-offset: 8
5472 * End:
5473 */
Linux 6.x block layer and io_uring tree(s)