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NFSv4: Fix an embarassing typo in encode_attrs()
[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
26e976a8 306static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 307{
7539bbab 308 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 309 spin_lock(&clp->cl_lock);
310 if (time_before(clp->cl_last_renewal,timestamp))
311 clp->cl_last_renewal = timestamp;
312 spin_unlock(&clp->cl_lock);
313}
314
cccef3b9
AA		 315#if defined(CONFIG_NFS_V4_1)
316
e2c4ab3c
AA		 317/*
318 * nfs4_free_slot - free a slot and efficiently update slot table.
319 *
320 * freeing a slot is trivially done by clearing its respective bit
321 * in the bitmap.
322 * If the freed slotid equals highest_used_slotid we want to update it
323 * so that the server would be able to size down the slot table if needed,
324 * otherwise we know that the highest_used_slotid is still in use.
325 * When updating highest_used_slotid there may be "holes" in the bitmap
326 * so we need to scan down from highest_used_slotid to 0 looking for the now
327 * highest slotid in use.
328 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 329 *
330 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 331 */
332static void
333nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
334{
335 int slotid = free_slotid;
336
e2c4ab3c
AA		 337 /* clear used bit in bitmap */
338 __clear_bit(slotid, tbl->used_slots);
339
340 /* update highest_used_slotid when it is freed */
341 if (slotid == tbl->highest_used_slotid) {
342 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 343 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 344 tbl->highest_used_slotid = slotid;
345 else
346 tbl->highest_used_slotid = -1;
347 }
e2c4ab3c
AA		 348 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
349 free_slotid, tbl->highest_used_slotid);
350}
351
3bfb0fc5
AB		 352/*
353 * Signal state manager thread if session is drained
354 */
355static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
356{
689cf5c1
AB		 357 struct rpc_task *task;
358
3bfb0fc5 359 if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
689cf5c1
AB		 360 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
361 if (task)
362 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 363 return;
364 }
365
366 if (ses->fc_slot_table.highest_used_slotid != -1)
367 return;
368
369 dprintk("%s COMPLETE: Session Drained\n", __func__);
370 complete(&ses->complete);
371}
372
d61e612a 373static void nfs41_sequence_free_slot(const struct nfs_client *clp,
13615871
AA		 374 struct nfs4_sequence_res *res)
375{
376 struct nfs4_slot_table *tbl;
377
13615871
AA		 378 tbl = &clp->cl_session->fc_slot_table;
379 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 380 /* just wake up the next guy waiting since
381 * we may have not consumed a slot after all */
691daf3b 382 dprintk("%s: No slot\n", __func__);
35dc1d74 383 return;
13615871 384 }
ea028ac9 385
35dc1d74
TM		 386 spin_lock(&tbl->slot_tbl_lock);
387 nfs4_free_slot(tbl, res->sr_slotid);
3bfb0fc5 388 nfs41_check_drain_session_complete(clp->cl_session);
35dc1d74
TM		 389 spin_unlock(&tbl->slot_tbl_lock);
390 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 391}
392
b0df806c
AA		 393static void nfs41_sequence_done(struct nfs_client *clp,
394 struct nfs4_sequence_res *res,
395 int rpc_status)
396{
397 unsigned long timestamp;
398 struct nfs4_slot_table *tbl;
399 struct nfs4_slot *slot;
400
401 /*
402 * sr_status remains 1 if an RPC level error occurred. The server
403 * may or may not have processed the sequence operation..
404 * Proceed as if the server received and processed the sequence
405 * operation.
406 */
407 if (res->sr_status == 1)
408 res->sr_status = NFS_OK;
409
410 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
411 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
412 goto out;
413
691daf3b 414 /* Check the SEQUENCE operation status */
b0df806c 415 if (res->sr_status == 0) {
691daf3b
AA		 416 tbl = &clp->cl_session->fc_slot_table;
417 slot = tbl->slots + res->sr_slotid;
b0df806c
AA		 418 /* Update the slot's sequence and clientid lease timer */
419 ++slot->seq_nr;
420 timestamp = res->sr_renewal_time;
421 spin_lock(&clp->cl_lock);
422 if (time_before(clp->cl_last_renewal, timestamp))
423 clp->cl_last_renewal = timestamp;
424 spin_unlock(&clp->cl_lock);
0629e370 425 /* Check sequence flags */
7135840f
AB		 426 if (atomic_read(&clp->cl_count) > 1)
427 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
b0df806c
AA		 428 }
429out:
430 /* The session may be reset by one of the error handlers. */
431 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
432 nfs41_sequence_free_slot(clp, res);
433}
434
510b8175
BH		 435/*
436 * nfs4_find_slot - efficiently look for a free slot
437 *
438 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
439 * If found, we mark the slot as used, update the highest_used_slotid,
440 * and respectively set up the sequence operation args.
441 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 442 *
443 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 444 */
445static u8
40ead580 446nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 447{
448 int slotid;
449 u8 ret_id = NFS4_MAX_SLOT_TABLE;
450 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
451
510b8175
BH		 452 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
453 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
454 tbl->max_slots);
455 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
456 if (slotid >= tbl->max_slots)
457 goto out;
458 __set_bit(slotid, tbl->used_slots);
459 if (slotid > tbl->highest_used_slotid)
460 tbl->highest_used_slotid = slotid;
461 ret_id = slotid;
462out:
463 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
464 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 465 return ret_id;
466}
467
ce5039c1
AA		 468static int nfs41_setup_sequence(struct nfs4_session *session,
469 struct nfs4_sequence_args *args,
470 struct nfs4_sequence_res *res,
471 int cache_reply,
472 struct rpc_task *task)
473{
fbcd4abc
AA		 474 struct nfs4_slot *slot;
475 struct nfs4_slot_table *tbl;
476 u8 slotid;
477
478 dprintk("--> %s\n", __func__);
ce5039c1
AA		 479 /* slot already allocated? */
480 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
481 return 0;
482
483 memset(res, 0, sizeof(*res));
484 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 485 tbl = &session->fc_slot_table;
486
487 spin_lock(&tbl->slot_tbl_lock);
5601a00d
AB		 488 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
489 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 490 /*
491 * The state manager will wait until the slot table is empty.
492 * Schedule the reset thread
493 */
05f0d236 494 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 495 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 496 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 497 return -EAGAIN;
b069d94a
AA		 498 }
499
689cf5c1
AB		 500 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
501 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
502 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
503 spin_unlock(&tbl->slot_tbl_lock);
504 dprintk("%s enforce FIFO order\n", __func__);
505 return -EAGAIN;
506 }
507
40ead580 508 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 509 if (slotid == NFS4_MAX_SLOT_TABLE) {
510 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
511 spin_unlock(&tbl->slot_tbl_lock);
512 dprintk("<-- %s: no free slots\n", __func__);
513 return -EAGAIN;
514 }
515 spin_unlock(&tbl->slot_tbl_lock);
516
689cf5c1 517 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 518 slot = tbl->slots + slotid;
99fe60d0 519 args->sa_session = session;
fbcd4abc
AA		 520 args->sa_slotid = slotid;
521 args->sa_cache_this = cache_reply;
522
523 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
524
99fe60d0 525 res->sr_session = session;
fbcd4abc
AA		 526 res->sr_slotid = slotid;
527 res->sr_renewal_time = jiffies;
528 /*
529 * sr_status is only set in decode_sequence, and so will remain
530 * set to 1 if an rpc level failure occurs.
531 */
532 res->sr_status = 1;
ce5039c1
AA		 533 return 0;
534}
535
536int nfs4_setup_sequence(struct nfs_client *clp,
537 struct nfs4_sequence_args *args,
538 struct nfs4_sequence_res *res,
539 int cache_reply,
540 struct rpc_task *task)
541{
542 int ret = 0;
543
544 dprintk("--> %s clp %p session %p sr_slotid %d\n",
545 __func__, clp, clp->cl_session, res->sr_slotid);
546
547 if (!nfs4_has_session(clp))
548 goto out;
549 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
550 task);
2628eddf 551 if (ret && ret != -EAGAIN) {
ce5039c1
AA		 552 /* terminate rpc task */
553 task->tk_status = ret;
554 task->tk_action = NULL;
555 }
556out:
557 dprintk("<-- %s status=%d\n", __func__, ret);
558 return ret;
559}
560
561struct nfs41_call_sync_data {
562 struct nfs_client *clp;
563 struct nfs4_sequence_args *seq_args;
564 struct nfs4_sequence_res *seq_res;
565 int cache_reply;
566};
567
568static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
569{
570 struct nfs41_call_sync_data *data = calldata;
571
572 dprintk("--> %s data->clp->cl_session %p\n", __func__,
573 data->clp->cl_session);
574 if (nfs4_setup_sequence(data->clp, data->seq_args,
575 data->seq_res, data->cache_reply, task))
576 return;
577 rpc_call_start(task);
578}
579
b257957e
AB		 580static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
581{
582 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
583 nfs41_call_sync_prepare(task, calldata);
584}
585
69ab40c4
AA		 586static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
587{
588 struct nfs41_call_sync_data *data = calldata;
589
590 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
69ab40c4
AA		 591}
592
ce5039c1
AA		 593struct rpc_call_ops nfs41_call_sync_ops = {
594 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 595 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 596};
597
b257957e
AB		 598struct rpc_call_ops nfs41_call_priv_sync_ops = {
599 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
600 .rpc_call_done = nfs41_call_sync_done,
601};
602
ce5039c1
AA		 603static int nfs4_call_sync_sequence(struct nfs_client *clp,
604 struct rpc_clnt *clnt,
605 struct rpc_message *msg,
606 struct nfs4_sequence_args *args,
607 struct nfs4_sequence_res *res,
b257957e
AB		 608 int cache_reply,
609 int privileged)
ce5039c1
AA		 610{
611 int ret;
612 struct rpc_task *task;
613 struct nfs41_call_sync_data data = {
614 .clp = clp,
615 .seq_args = args,
616 .seq_res = res,
617 .cache_reply = cache_reply,
618 };
619 struct rpc_task_setup task_setup = {
620 .rpc_client = clnt,
621 .rpc_message = msg,
622 .callback_ops = &nfs41_call_sync_ops,
623 .callback_data = &data
624 };
625
626 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 627 if (privileged)
628 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 629 task = rpc_run_task(&task_setup);
630 if (IS_ERR(task))
631 ret = PTR_ERR(task);
632 else {
633 ret = task->tk_status;
634 rpc_put_task(task);
635 }
636 return ret;
637}
638
cccef3b9
AA		 639int _nfs4_call_sync_session(struct nfs_server *server,
640 struct rpc_message *msg,
641 struct nfs4_sequence_args *args,
642 struct nfs4_sequence_res *res,
643 int cache_reply)
644{
ce5039c1 645 return nfs4_call_sync_sequence(server->nfs_client, server->client,
b257957e 646 msg, args, res, cache_reply, 0);
cccef3b9
AA		 647}
648
649#endif /* CONFIG_NFS_V4_1 */
650
651int _nfs4_call_sync(struct nfs_server *server,
652 struct rpc_message *msg,
653 struct nfs4_sequence_args *args,
654 struct nfs4_sequence_res *res,
655 int cache_reply)
656{
f3752975 657 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 658 return rpc_call_sync(server->client, msg, 0);
659}
660
661#define nfs4_call_sync(server, msg, args, res, cache_reply) \
662 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
663 &(res)->seq_res, (cache_reply))
664
b0df806c
AA		 665static void nfs4_sequence_done(const struct nfs_server *server,
666 struct nfs4_sequence_res *res, int rpc_status)
667{
668#ifdef CONFIG_NFS_V4_1
669 if (nfs4_has_session(server->nfs_client))
670 nfs41_sequence_done(server->nfs_client, res, rpc_status);
671#endif /* CONFIG_NFS_V4_1 */
672}
673
38478b24 674static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 675{
38478b24 676 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 677
38478b24 678 spin_lock(&dir->i_lock);
40d24704
TM		 679 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
680 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 681 nfs_force_lookup_revalidate(dir);
40d24704 682 nfsi->change_attr = cinfo->after;
38478b24 683 spin_unlock(&dir->i_lock);
1da177e4
LT		 684}
685
e56e0b78 686struct nfs4_opendata {
c6d00e63 687 struct kref kref;
e56e0b78
TM		 688 struct nfs_openargs o_arg;
689 struct nfs_openres o_res;
cdd4e68b
TM		 690 struct nfs_open_confirmargs c_arg;
691 struct nfs_open_confirmres c_res;
e56e0b78
TM		 692 struct nfs_fattr f_attr;
693 struct nfs_fattr dir_attr;
ad389da7 694 struct path path;
e56e0b78
TM		 695 struct dentry *dir;
696 struct nfs4_state_owner *owner;
aac00a8d 697 struct nfs4_state *state;
e56e0b78 698 struct iattr attrs;
26e976a8 699 unsigned long timestamp;
3e309914 700 unsigned int rpc_done : 1;
24ac23ab
TM		 701 int rpc_status;
702 int cancelled;
e56e0b78
TM		 703};
704
2ced46c2
TM		 705
706static void nfs4_init_opendata_res(struct nfs4_opendata *p)
707{
708 p->o_res.f_attr = &p->f_attr;
709 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 710 p->o_res.seqid = p->o_arg.seqid;
711 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 712 p->o_res.server = p->o_arg.server;
713 nfs_fattr_init(&p->f_attr);
714 nfs_fattr_init(&p->dir_attr);
578e4585 715 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 716}
717
ad389da7 718static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 719 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 720 const struct iattr *attrs,
721 gfp_t gfp_mask)
e56e0b78 722{
ad389da7 723 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 724 struct inode *dir = parent->d_inode;
725 struct nfs_server *server = NFS_SERVER(dir);
726 struct nfs4_opendata *p;
727
8535b2be 728 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 729 if (p == NULL)
730 goto err;
8535b2be 731 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 732 if (p->o_arg.seqid == NULL)
733 goto err_free;
f6948697
AV		 734 path_get(path);
735 p->path = *path;
e56e0b78
TM		 736 p->dir = parent;
737 p->owner = sp;
738 atomic_inc(&sp->so_count);
739 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 740 p->o_arg.open_flags = flags;
741 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 742 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 743 p->o_arg.id = sp->so_owner_id.id;
ad389da7 744 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 745 p->o_arg.server = server;
746 p->o_arg.bitmask = server->attr_bitmask;
747 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78 748 if (flags & O_EXCL) {
4882ef72
AB		 749 if (nfs4_has_persistent_session(server->nfs_client)) {
750 /* GUARDED */
751 p->o_arg.u.attrs = &p->attrs;
752 memcpy(&p->attrs, attrs, sizeof(p->attrs));
753 } else { /* EXCLUSIVE4_1 */
754 u32 *s = (u32 *) p->o_arg.u.verifier.data;
755 s[0] = jiffies;
756 s[1] = current->pid;
757 }
e56e0b78
TM		 758 } else if (flags & O_CREAT) {
759 p->o_arg.u.attrs = &p->attrs;
760 memcpy(&p->attrs, attrs, sizeof(p->attrs));
761 }
cdd4e68b
TM		 762 p->c_arg.fh = &p->o_res.fh;
763 p->c_arg.stateid = &p->o_res.stateid;
764 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 765 nfs4_init_opendata_res(p);
c6d00e63 766 kref_init(&p->kref);
e56e0b78
TM		 767 return p;
768err_free:
769 kfree(p);
770err:
771 dput(parent);
772 return NULL;
773}
774
c6d00e63 775static void nfs4_opendata_free(struct kref *kref)
e56e0b78 776{
c6d00e63
TM		 777 struct nfs4_opendata *p = container_of(kref,
778 struct nfs4_opendata, kref);
779
780 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 781 if (p->state != NULL)
782 nfs4_put_open_state(p->state);
c6d00e63
TM		 783 nfs4_put_state_owner(p->owner);
784 dput(p->dir);
31f31db1 785 path_put(&p->path);
c6d00e63
TM		 786 kfree(p);
787}
788
789static void nfs4_opendata_put(struct nfs4_opendata *p)
790{
791 if (p != NULL)
792 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 793}
794
06f814a3
TM		 795static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
796{
06f814a3
TM		 797 int ret;
798
06f814a3 799 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 800 return ret;
801}
802
dc0b027d 803static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 804{
805 int ret = 0;
dc0b027d
TM		 806
807 if (open_mode & O_EXCL)
808 goto out;
809 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 810 case FMODE_READ:
88069f77
TM		 811 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
812 && state->n_rdonly != 0;
6ee41268
TM		 813 break;
814 case FMODE_WRITE:
88069f77
TM		 815 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
816 && state->n_wronly != 0;
6ee41268
TM		 817 break;
818 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 819 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
820 && state->n_rdwr != 0;
6ee41268 821 }
dc0b027d 822out:
6ee41268
TM		 823 return ret;
824}
825
dc0b027d 826static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 827{
dc0b027d 828 if ((delegation->type & fmode) != fmode)
aac00a8d 829 return 0;
15c831bf 830 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 831 return 0;
b7391f44 832 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 833 return 1;
834}
835
dc0b027d 836static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 837{
dc0b027d 838 switch (fmode) {
e7616923
TM		 839 case FMODE_WRITE:
840 state->n_wronly++;
841 break;
842 case FMODE_READ:
843 state->n_rdonly++;
844 break;
845 case FMODE_READ|FMODE_WRITE:
846 state->n_rdwr++;
847 }
dc0b027d 848 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 849}
850
dc0b027d 851static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 852{
853 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
854 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
855 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 856 switch (fmode) {
003707c7
TM		 857 case FMODE_READ:
858 set_bit(NFS_O_RDONLY_STATE, &state->flags);
859 break;
860 case FMODE_WRITE:
861 set_bit(NFS_O_WRONLY_STATE, &state->flags);
862 break;
863 case FMODE_READ|FMODE_WRITE:
864 set_bit(NFS_O_RDWR_STATE, &state->flags);
865 }
e7616923
TM		 866}
867
dc0b027d 868static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 869{
8bda4e4c 870 write_seqlock(&state->seqlock);
dc0b027d 871 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 872 write_sequnlock(&state->seqlock);
003707c7
TM		 873}
874
dc0b027d 875static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 876{
8bda4e4c
TM		 877 /*
878 * Protect the call to nfs4_state_set_mode_locked and
879 * serialise the stateid update
880 */
881 write_seqlock(&state->seqlock);
003707c7
TM		 882 if (deleg_stateid != NULL) {
883 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
884 set_bit(NFS_DELEGATED_STATE, &state->flags);
885 }
886 if (open_stateid != NULL)
dc0b027d 887 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 888 write_sequnlock(&state->seqlock);
889 spin_lock(&state->owner->so_lock);
dc0b027d 890 update_open_stateflags(state, fmode);
ec073428 891 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 892}
893
dc0b027d 894static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 895{
896 struct nfs_inode *nfsi = NFS_I(state->inode);
897 struct nfs_delegation *deleg_cur;
898 int ret = 0;
899
dc0b027d 900 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 901
902 rcu_read_lock();
903 deleg_cur = rcu_dereference(nfsi->delegation);
904 if (deleg_cur == NULL)
905 goto no_delegation;
906
907 spin_lock(&deleg_cur->lock);
908 if (nfsi->delegation != deleg_cur ||
dc0b027d 909 (deleg_cur->type & fmode) != fmode)
34310430
TM		 910 goto no_delegation_unlock;
911
912 if (delegation == NULL)
913 delegation = &deleg_cur->stateid;
914 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
915 goto no_delegation_unlock;
916
b7391f44 917 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 918 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 919 ret = 1;
920no_delegation_unlock:
921 spin_unlock(&deleg_cur->lock);
922no_delegation:
923 rcu_read_unlock();
924
925 if (!ret && open_stateid != NULL) {
dc0b027d 926 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 927 ret = 1;
928 }
929
930 return ret;
931}
932
933
dc0b027d 934static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 935{
936 struct nfs_delegation *delegation;
937
938 rcu_read_lock();
939 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 940 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 941 rcu_read_unlock();
942 return;
943 }
944 rcu_read_unlock();
945 nfs_inode_return_delegation(inode);
946}
947
6ee41268 948static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 949{
950 struct nfs4_state *state = opendata->state;
951 struct nfs_inode *nfsi = NFS_I(state->inode);
952 struct nfs_delegation *delegation;
dc0b027d
TM		 953 int open_mode = opendata->o_arg.open_flags & O_EXCL;
954 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 955 nfs4_stateid stateid;
956 int ret = -EAGAIN;
957
aac00a8d 958 for (;;) {
dc0b027d 959 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 960 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 961 if (can_open_cached(state, fmode, open_mode)) {
962 update_open_stateflags(state, fmode);
6ee41268 963 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 964 goto out_return_state;
965 }
966 spin_unlock(&state->owner->so_lock);
967 }
34310430
TM		 968 rcu_read_lock();
969 delegation = rcu_dereference(nfsi->delegation);
970 if (delegation == NULL ||
dc0b027d 971 !can_open_delegated(delegation, fmode)) {
34310430 972 rcu_read_unlock();
aac00a8d 973 break;
34310430 974 }
aac00a8d
TM		 975 /* Save the delegation */
976 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
977 rcu_read_unlock();
af22f94a 978 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 979 if (ret != 0)
980 goto out;
981 ret = -EAGAIN;
34310430
TM		 982
983 /* Try to update the stateid using the delegation */
dc0b027d 984 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 985 goto out_return_state;
aac00a8d 986 }
aac00a8d
TM		 987out:
988 return ERR_PTR(ret);
989out_return_state:
990 atomic_inc(&state->count);
991 return state;
992}
993
24ac23ab
TM		 994static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
995{
996 struct inode *inode;
997 struct nfs4_state *state = NULL;
003707c7 998 struct nfs_delegation *delegation;
1b370bc2 999 int ret;
24ac23ab 1000
aac00a8d 1001 if (!data->rpc_done) {
6ee41268 1002 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1003 goto out;
1004 }
1005
1b370bc2 1006 ret = -EAGAIN;
24ac23ab 1007 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1008 goto err;
24ac23ab 1009 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1010 ret = PTR_ERR(inode);
03f28e3a 1011 if (IS_ERR(inode))
1b370bc2
TM		 1012 goto err;
1013 ret = -ENOMEM;
24ac23ab
TM		 1014 state = nfs4_get_open_state(inode, data->owner);
1015 if (state == NULL)
1b370bc2 1016 goto err_put_inode;
549d6ed5 1017 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1018 int delegation_flags = 0;
1019
003707c7
TM		 1020 rcu_read_lock();
1021 delegation = rcu_dereference(NFS_I(inode)->delegation);
1022 if (delegation)
1023 delegation_flags = delegation->flags;
1024 rcu_read_unlock();
15c831bf 1025 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1026 nfs_inode_set_delegation(state->inode,
1027 data->owner->so_cred,
1028 &data->o_res);
1029 else
1030 nfs_inode_reclaim_delegation(state->inode,
1031 data->owner->so_cred,
1032 &data->o_res);
1033 }
34310430
TM		 1034
1035 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1036 data->o_arg.fmode);
24ac23ab 1037 iput(inode);
aac00a8d 1038out:
24ac23ab 1039 return state;
1b370bc2
TM		 1040err_put_inode:
1041 iput(inode);
1042err:
1043 return ERR_PTR(ret);
24ac23ab
TM		 1044}
1045
864472e9
TM		 1046static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1047{
1048 struct nfs_inode *nfsi = NFS_I(state->inode);
1049 struct nfs_open_context *ctx;
1050
1051 spin_lock(&state->inode->i_lock);
1052 list_for_each_entry(ctx, &nfsi->open_files, list) {
1053 if (ctx->state != state)
1054 continue;
1055 get_nfs_open_context(ctx);
1056 spin_unlock(&state->inode->i_lock);
1057 return ctx;
1058 }
1059 spin_unlock(&state->inode->i_lock);
1060 return ERR_PTR(-ENOENT);
1061}
1062
6f220ed5
TM		 1063static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1064{
1065 struct nfs4_opendata *opendata;
1066
8535b2be 1067 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1068 if (opendata == NULL)
1069 return ERR_PTR(-ENOMEM);
1070 opendata->state = state;
1071 atomic_inc(&state->count);
1072 return opendata;
1073}
1074
dc0b027d 1075static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1076{
2ced46c2 1077 struct nfs4_state *newstate;
864472e9
TM		 1078 int ret;
1079
dc0b027d
TM		 1080 opendata->o_arg.open_flags = 0;
1081 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1082 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1083 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1084 nfs4_init_opendata_res(opendata);
b257957e 1085 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1086 if (ret != 0)
1087 return ret;
2ced46c2 1088 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1089 if (IS_ERR(newstate))
1090 return PTR_ERR(newstate);
dc0b027d 1091 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1092 *res = newstate;
864472e9
TM		 1093 return 0;
1094}
1095
1096static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1097{
864472e9 1098 struct nfs4_state *newstate;
864472e9
TM		 1099 int ret;
1100
1101 /* memory barrier prior to reading state->n_* */
2ced46c2 1102 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1103 smp_rmb();
1104 if (state->n_rdwr != 0) {
2ced46c2 1105 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1106 if (ret != 0)
1107 return ret;
2ced46c2
TM		 1108 if (newstate != state)
1109 return -ESTALE;
864472e9
TM		 1110 }
1111 if (state->n_wronly != 0) {
2ced46c2 1112 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1113 if (ret != 0)
1114 return ret;
2ced46c2
TM		 1115 if (newstate != state)
1116 return -ESTALE;
864472e9
TM		 1117 }
1118 if (state->n_rdonly != 0) {
2ced46c2 1119 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1120 if (ret != 0)
1121 return ret;
2ced46c2
TM		 1122 if (newstate != state)
1123 return -ESTALE;
864472e9 1124 }
1ac7e2fd
TM		 1125 /*
1126 * We may have performed cached opens for all three recoveries.
1127 * Check if we need to update the current stateid.
1128 */
1129 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1130 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1131 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1132 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1133 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1134 write_sequnlock(&state->seqlock);
1ac7e2fd 1135 }
864472e9
TM		 1136 return 0;
1137}
1138
1da177e4
LT		 1139/*
1140 * OPEN_RECLAIM:
1141 * reclaim state on the server after a reboot.
1da177e4 1142 */
539cd03a 1143static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1144{
1ac7e2fd 1145 struct nfs_delegation *delegation;
864472e9 1146 struct nfs4_opendata *opendata;
dc0b027d 1147 fmode_t delegation_type = 0;
1da177e4
LT		 1148 int status;
1149
6f220ed5
TM		 1150 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1151 if (IS_ERR(opendata))
1152 return PTR_ERR(opendata);
864472e9
TM		 1153 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1154 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1155 rcu_read_lock();
1156 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1157 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1158 delegation_type = delegation->type;
1ac7e2fd 1159 rcu_read_unlock();
864472e9
TM		 1160 opendata->o_arg.u.delegation_type = delegation_type;
1161 status = nfs4_open_recover(opendata, state);
c6d00e63 1162 nfs4_opendata_put(opendata);
1da177e4
LT		 1163 return status;
1164}
1165
539cd03a 1166static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1167{
1168 struct nfs_server *server = NFS_SERVER(state->inode);
1169 struct nfs4_exception exception = { };
1170 int err;
1171 do {
539cd03a 1172 err = _nfs4_do_open_reclaim(ctx, state);
2c643488 1173 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 1174 break;
1175 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1176 } while (exception.retry);
1177 return err;
1178}
1179
864472e9
TM		 1180static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1181{
1182 struct nfs_open_context *ctx;
1183 int ret;
1184
1185 ctx = nfs4_state_find_open_context(state);
1186 if (IS_ERR(ctx))
1187 return PTR_ERR(ctx);
539cd03a 1188 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1189 put_nfs_open_context(ctx);
1190 return ret;
1191}
1192
13437e12 1193static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1194{
e56e0b78 1195 struct nfs4_opendata *opendata;
864472e9 1196 int ret;
1da177e4 1197
6f220ed5
TM		 1198 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1199 if (IS_ERR(opendata))
1200 return PTR_ERR(opendata);
e56e0b78 1201 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1202 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1203 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1204 ret = nfs4_open_recover(opendata, state);
c6d00e63 1205 nfs4_opendata_put(opendata);
864472e9 1206 return ret;
1da177e4
LT		 1207}
1208
13437e12 1209int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1210{
1211 struct nfs4_exception exception = { };
539cd03a 1212 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1213 int err;
1214 do {
13437e12 1215 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1216 switch (err) {
1217 case 0:
965b5d67
TM		 1218 case -ENOENT:
1219 case -ESTALE:
1220 goto out;
bcfa49f6
RL		 1221 case -NFS4ERR_BADSESSION:
1222 case -NFS4ERR_BADSLOT:
1223 case -NFS4ERR_BAD_HIGH_SLOT:
1224 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1225 case -NFS4ERR_DEADSESSION:
1226 nfs4_schedule_state_recovery(
1227 server->nfs_client);
1228 goto out;
1da177e4
LT		 1229 case -NFS4ERR_STALE_CLIENTID:
1230 case -NFS4ERR_STALE_STATEID:
1231 case -NFS4ERR_EXPIRED:
1232 /* Don't recall a delegation if it was lost */
7539bbab 1233 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1234 goto out;
1235 case -ERESTARTSYS:
1236 /*
1237 * The show must go on: exit, but mark the
1238 * stateid as needing recovery.
1239 */
1240 case -NFS4ERR_ADMIN_REVOKED:
1241 case -NFS4ERR_BAD_STATEID:
1242 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1243 case -ENOMEM:
1244 err = 0;
1245 goto out;
1da177e4
LT		 1246 }
1247 err = nfs4_handle_exception(server, err, &exception);
1248 } while (exception.retry);
965b5d67 1249out:
1da177e4
LT		 1250 return err;
1251}
1252
cdd4e68b
TM		 1253static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1254{
1255 struct nfs4_opendata *data = calldata;
1256
1257 data->rpc_status = task->tk_status;
1258 if (RPC_ASSASSINATED(task))
1259 return;
26e976a8 1260 if (data->rpc_status == 0) {
cdd4e68b
TM		 1261 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1262 sizeof(data->o_res.stateid.data));
bb22629e 1263 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1264 renew_lease(data->o_res.server, data->timestamp);
3e309914 1265 data->rpc_done = 1;
26e976a8 1266 }
cdd4e68b
TM		 1267}
1268
1269static void nfs4_open_confirm_release(void *calldata)
1270{
1271 struct nfs4_opendata *data = calldata;
1272 struct nfs4_state *state = NULL;
1273
1274 /* If this request hasn't been cancelled, do nothing */
1275 if (data->cancelled == 0)
1276 goto out_free;
1277 /* In case of error, no cleanup! */
3e309914 1278 if (!data->rpc_done)
cdd4e68b 1279 goto out_free;
cdd4e68b 1280 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1281 if (!IS_ERR(state))
dc0b027d 1282 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1283out_free:
c6d00e63 1284 nfs4_opendata_put(data);
cdd4e68b
TM		 1285}
1286
1287static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1288 .rpc_call_done = nfs4_open_confirm_done,
1289 .rpc_release = nfs4_open_confirm_release,
1290};
1291
1292/*
1293 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1294 */
1295static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1296{
1297 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1298 struct rpc_task *task;
5138fde0
TM		 1299 struct rpc_message msg = {
1300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1301 .rpc_argp = &data->c_arg,
1302 .rpc_resp = &data->c_res,
1303 .rpc_cred = data->owner->so_cred,
1304 };
c970aa85
TM		 1305 struct rpc_task_setup task_setup_data = {
1306 .rpc_client = server->client,
5138fde0 1307 .rpc_message = &msg,
c970aa85
TM		 1308 .callback_ops = &nfs4_open_confirm_ops,
1309 .callback_data = data,
101070ca 1310 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1311 .flags = RPC_TASK_ASYNC,
1312 };
1da177e4
LT		 1313 int status;
1314
c6d00e63 1315 kref_get(&data->kref);
3e309914
TM		 1316 data->rpc_done = 0;
1317 data->rpc_status = 0;
5138fde0 1318 data->timestamp = jiffies;
c970aa85 1319 task = rpc_run_task(&task_setup_data);
7a1218a2 1320 if (IS_ERR(task))
cdd4e68b 1321 return PTR_ERR(task);
cdd4e68b
TM		 1322 status = nfs4_wait_for_completion_rpc_task(task);
1323 if (status != 0) {
1324 data->cancelled = 1;
1325 smp_wmb();
1326 } else
1327 status = data->rpc_status;
e6b3c4db 1328 rpc_put_task(task);
1da177e4
LT		 1329 return status;
1330}
1331
24ac23ab 1332static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1333{
24ac23ab
TM		 1334 struct nfs4_opendata *data = calldata;
1335 struct nfs4_state_owner *sp = data->owner;
5138fde0 1336
24ac23ab
TM		 1337 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1338 return;
aac00a8d
TM		 1339 /*
1340 * Check if we still need to send an OPEN call, or if we can use
1341 * a delegation instead.
1342 */
1343 if (data->state != NULL) {
1344 struct nfs_delegation *delegation;
1345
dc0b027d 1346 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1347 goto out_no_action;
aac00a8d
TM		 1348 rcu_read_lock();
1349 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1350 if (delegation != NULL &&
15c831bf 1351 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1352 rcu_read_unlock();
6ee41268 1353 goto out_no_action;
aac00a8d
TM		 1354 }
1355 rcu_read_unlock();
1356 }
24ac23ab 1357 /* Update sequence id. */
9f958ab8 1358 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1359 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1360 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1361 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1362 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1363 }
26e976a8 1364 data->timestamp = jiffies;
d898528c
AA		 1365 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1366 &data->o_arg.seq_args,
1367 &data->o_res.seq_res, 1, task))
1368 return;
5138fde0 1369 rpc_call_start(task);
6ee41268
TM		 1370 return;
1371out_no_action:
1372 task->tk_action = NULL;
1373
24ac23ab 1374}
1da177e4 1375
b257957e
AB		 1376static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1377{
1378 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1379 nfs4_open_prepare(task, calldata);
1380}
1381
24ac23ab
TM		 1382static void nfs4_open_done(struct rpc_task *task, void *calldata)
1383{
1384 struct nfs4_opendata *data = calldata;
1da177e4 1385
24ac23ab 1386 data->rpc_status = task->tk_status;
d898528c 1387
d61e612a
TM		 1388 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1389 task->tk_status);
d898528c 1390
24ac23ab
TM		 1391 if (RPC_ASSASSINATED(task))
1392 return;
1393 if (task->tk_status == 0) {
1394 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1395 case S_IFREG:
1396 break;
1397 case S_IFLNK:
24ac23ab 1398 data->rpc_status = -ELOOP;
6f926b5b
TM		 1399 break;
1400 case S_IFDIR:
24ac23ab 1401 data->rpc_status = -EISDIR;
6f926b5b
TM		 1402 break;
1403 default:
24ac23ab 1404 data->rpc_status = -ENOTDIR;
6f926b5b 1405 }
26e976a8 1406 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1407 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1408 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1409 }
3e309914 1410 data->rpc_done = 1;
24ac23ab 1411}
6f926b5b 1412
24ac23ab
TM		 1413static void nfs4_open_release(void *calldata)
1414{
1415 struct nfs4_opendata *data = calldata;
1416 struct nfs4_state *state = NULL;
1417
1418 /* If this request hasn't been cancelled, do nothing */
1419 if (data->cancelled == 0)
1420 goto out_free;
1421 /* In case of error, no cleanup! */
3e309914 1422 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1423 goto out_free;
1424 /* In case we need an open_confirm, no cleanup! */
1425 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1426 goto out_free;
24ac23ab 1427 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1428 if (!IS_ERR(state))
dc0b027d 1429 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1430out_free:
c6d00e63 1431 nfs4_opendata_put(data);
24ac23ab
TM		 1432}
1433
1434static const struct rpc_call_ops nfs4_open_ops = {
1435 .rpc_call_prepare = nfs4_open_prepare,
1436 .rpc_call_done = nfs4_open_done,
1437 .rpc_release = nfs4_open_release,
1438};
1439
b257957e
AB		 1440static const struct rpc_call_ops nfs4_recover_open_ops = {
1441 .rpc_call_prepare = nfs4_recover_open_prepare,
1442 .rpc_call_done = nfs4_open_done,
1443 .rpc_release = nfs4_open_release,
1444};
1445
1446static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1447{
1448 struct inode *dir = data->dir->d_inode;
1449 struct nfs_server *server = NFS_SERVER(dir);
1450 struct nfs_openargs *o_arg = &data->o_arg;
1451 struct nfs_openres *o_res = &data->o_res;
1452 struct rpc_task *task;
5138fde0
TM		 1453 struct rpc_message msg = {
1454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1455 .rpc_argp = o_arg,
1456 .rpc_resp = o_res,
1457 .rpc_cred = data->owner->so_cred,
1458 };
c970aa85
TM		 1459 struct rpc_task_setup task_setup_data = {
1460 .rpc_client = server->client,
5138fde0 1461 .rpc_message = &msg,
c970aa85
TM		 1462 .callback_ops = &nfs4_open_ops,
1463 .callback_data = data,
101070ca 1464 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1465 .flags = RPC_TASK_ASYNC,
1466 };
24ac23ab
TM		 1467 int status;
1468
c6d00e63 1469 kref_get(&data->kref);
3e309914
TM		 1470 data->rpc_done = 0;
1471 data->rpc_status = 0;
2ced46c2 1472 data->cancelled = 0;
b257957e
AB		 1473 if (isrecover)
1474 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1475 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1476 if (IS_ERR(task))
1477 return PTR_ERR(task);
1478 status = nfs4_wait_for_completion_rpc_task(task);
1479 if (status != 0) {
1480 data->cancelled = 1;
1481 smp_wmb();
1482 } else
1483 status = data->rpc_status;
1484 rpc_put_task(task);
1485
1486 return status;
1487}
1488
1489static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1490{
1491 struct inode *dir = data->dir->d_inode;
1492 struct nfs_openres *o_res = &data->o_res;
1493 int status;
1494
1495 status = nfs4_run_open_task(data, 1);
1496 if (status != 0 || !data->rpc_done)
1497 return status;
1498
1499 nfs_refresh_inode(dir, o_res->dir_attr);
1500
1501 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1502 status = _nfs4_proc_open_confirm(data);
1503 if (status != 0)
1504 return status;
1505 }
1506
1507 return status;
1508}
1509
1510/*
1511 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1512 */
1513static int _nfs4_proc_open(struct nfs4_opendata *data)
1514{
1515 struct inode *dir = data->dir->d_inode;
1516 struct nfs_server *server = NFS_SERVER(dir);
1517 struct nfs_openargs *o_arg = &data->o_arg;
1518 struct nfs_openres *o_res = &data->o_res;
1519 int status;
1520
1521 status = nfs4_run_open_task(data, 0);
3e309914 1522 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1523 return status;
1524
56ae19f3
TM		 1525 if (o_arg->open_flags & O_CREAT) {
1526 update_changeattr(dir, &o_res->cinfo);
1527 nfs_post_op_update_inode(dir, o_res->dir_attr);
1528 } else
1529 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1530 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1531 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1532 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1533 status = _nfs4_proc_open_confirm(data);
1da177e4 1534 if (status != 0)
24ac23ab 1535 return status;
1da177e4
LT		 1536 }
1537 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1538 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1539 return 0;
1da177e4
LT		 1540}
1541
10afec90 1542static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1543{
7539bbab 1544 struct nfs_client *clp = server->nfs_client;
a78cb57a 1545 unsigned int loop;
6b30954e 1546 int ret;
58d9714a 1547
a78cb57a 1548 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1549 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1550 if (ret != 0)
a78cb57a 1551 break;
e598d843
TM		 1552 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1553 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1554 break;
58d9714a 1555 nfs4_schedule_state_recovery(clp);
a78cb57a 1556 ret = -EIO;
6b30954e 1557 }
a78cb57a 1558 return ret;
58d9714a
TM		 1559}
1560
1da177e4
LT		 1561/*
1562 * OPEN_EXPIRED:
1563 * reclaim state on the server after a network partition.
1564 * Assumes caller holds the appropriate lock
1565 */
539cd03a 1566static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1567{
e56e0b78 1568 struct nfs4_opendata *opendata;
864472e9 1569 int ret;
1da177e4 1570
6f220ed5
TM		 1571 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1572 if (IS_ERR(opendata))
1573 return PTR_ERR(opendata);
864472e9 1574 ret = nfs4_open_recover(opendata, state);
35d05778 1575 if (ret == -ESTALE)
539cd03a 1576 d_drop(ctx->path.dentry);
c6d00e63 1577 nfs4_opendata_put(opendata);
864472e9 1578 return ret;
1da177e4
LT		 1579}
1580
a9ed2e25 1581static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1582{
539cd03a 1583 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1584 struct nfs4_exception exception = { };
1585 int err;
1586
1587 do {
539cd03a 1588 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1589 switch (err) {
1590 default:
1591 goto out;
1592 case -NFS4ERR_GRACE:
1593 case -NFS4ERR_DELAY:
2c643488 1594 case -EKEYEXPIRED:
a9ed2e25
TM		 1595 nfs4_handle_exception(server, err, &exception);
1596 err = 0;
1597 }
202b50dc 1598 } while (exception.retry);
a9ed2e25 1599out:
202b50dc
TM		 1600 return err;
1601}
1602
1da177e4
LT		 1603static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1604{
1da177e4 1605 struct nfs_open_context *ctx;
864472e9 1606 int ret;
1da177e4 1607
864472e9
TM		 1608 ctx = nfs4_state_find_open_context(state);
1609 if (IS_ERR(ctx))
1610 return PTR_ERR(ctx);
539cd03a 1611 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1612 put_nfs_open_context(ctx);
1613 return ret;
1da177e4
LT		 1614}
1615
aa53ed54
JL		 1616/*
1617 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1618 * fields corresponding to attributes that were used to store the verifier.
1619 * Make sure we clobber those fields in the later setattr call
1620 */
1621static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1622{
1623 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1624 !(sattr->ia_valid & ATTR_ATIME_SET))
1625 sattr->ia_valid |= ATTR_ATIME;
1626
1627 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1628 !(sattr->ia_valid & ATTR_MTIME_SET))
1629 sattr->ia_valid |= ATTR_MTIME;
1630}
1631
1da177e4 1632/*
24ac23ab 1633 * Returns a referenced nfs4_state
1da177e4 1634 */
dc0b027d 1635static 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		 1636{
1637 struct nfs4_state_owner *sp;
1638 struct nfs4_state *state = NULL;
1639 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1640 struct nfs4_opendata *opendata;
aac00a8d 1641 int status;
1da177e4
LT		 1642
1643 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1644 status = -ENOMEM;
1645 if (!(sp = nfs4_get_state_owner(server, cred))) {
1646 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1647 goto out_err;
1648 }
58d9714a
TM		 1649 status = nfs4_recover_expired_lease(server);
1650 if (status != 0)
b4454fe1 1651 goto err_put_state_owner;
aac00a8d 1652 if (path->dentry->d_inode != NULL)
dc0b027d 1653 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1654 status = -ENOMEM;
8535b2be 1655 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1656 if (opendata == NULL)
95d35cb4 1657 goto err_put_state_owner;
1da177e4 1658
aac00a8d
TM		 1659 if (path->dentry->d_inode != NULL)
1660 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1661
24ac23ab 1662 status = _nfs4_proc_open(opendata);
1da177e4 1663 if (status != 0)
c6d00e63 1664 goto err_opendata_put;
1da177e4 1665
24ac23ab 1666 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1667 status = PTR_ERR(state);
1668 if (IS_ERR(state))
c6d00e63 1669 goto err_opendata_put;
0df5dd4a 1670 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1671 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1672
1673 if (opendata->o_arg.open_flags & O_EXCL) {
1674 nfs4_exclusive_attrset(opendata, sattr);
1675
1676 nfs_fattr_init(opendata->o_res.f_attr);
1677 status = nfs4_do_setattr(state->inode, cred,
1678 opendata->o_res.f_attr, sattr,
1679 state);
1680 if (status == 0)
1681 nfs_setattr_update_inode(state->inode, sattr);
1682 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1683 }
c6d00e63 1684 nfs4_opendata_put(opendata);
1da177e4 1685 nfs4_put_state_owner(sp);
1da177e4
LT		 1686 *res = state;
1687 return 0;
c6d00e63
TM		 1688err_opendata_put:
1689 nfs4_opendata_put(opendata);
e56e0b78
TM		 1690err_put_state_owner:
1691 nfs4_put_state_owner(sp);
1da177e4 1692out_err:
1da177e4
LT		 1693 *res = NULL;
1694 return status;
1695}
1696
1697
dc0b027d 1698static 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		 1699{
1700 struct nfs4_exception exception = { };
1701 struct nfs4_state *res;
1702 int status;
1703
1704 do {
dc0b027d 1705 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1706 if (status == 0)
1707 break;
1708 /* NOTE: BAD_SEQID means the server and client disagree about the
1709 * book-keeping w.r.t. state-changing operations
1710 * (OPEN/CLOSE/LOCK/LOCKU...)
1711 * It is actually a sign of a bug on the client or on the server.
1712 *
1713 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1714 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1715 * have unhashed the old state_owner for us, and that we can
1716 * therefore safely retry using a new one. We should still warn
1717 * the user though...
1718 */
1719 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1720 printk(KERN_WARNING "NFS: v4 server %s "
1721 " returned a bad sequence-id error!\n",
1722 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1723 exception.retry = 1;
1724 continue;
1725 }
550f5747
TM		 1726 /*
1727 * BAD_STATEID on OPEN means that the server cancelled our
1728 * state before it received the OPEN_CONFIRM.
1729 * Recover by retrying the request as per the discussion
1730 * on Page 181 of RFC3530.
1731 */
1732 if (status == -NFS4ERR_BAD_STATEID) {
1733 exception.retry = 1;
1734 continue;
1735 }
aac00a8d
TM		 1736 if (status == -EAGAIN) {
1737 /* We must have found a delegation */
1738 exception.retry = 1;
1739 continue;
1740 }
1da177e4
LT		 1741 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1742 status, &exception));
1743 } while (exception.retry);
1744 return res;
1745}
1746
659bfcd6
TM		 1747static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1748 struct nfs_fattr *fattr, struct iattr *sattr,
1749 struct nfs4_state *state)
1da177e4 1750{
3e4f6290 1751 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1752 struct nfs_setattrargs arg = {
3e4f6290 1753 .fh = NFS_FH(inode),
1da177e4
LT		 1754 .iap = sattr,
1755 .server = server,
1756 .bitmask = server->attr_bitmask,
1757 };
1758 struct nfs_setattrres res = {
1759 .fattr = fattr,
1760 .server = server,
1761 };
1762 struct rpc_message msg = {
659bfcd6
TM		 1763 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1764 .rpc_argp = &arg,
1765 .rpc_resp = &res,
1766 .rpc_cred = cred,
1da177e4 1767 };
26e976a8 1768 unsigned long timestamp = jiffies;
65e4308d 1769 int status;
1da177e4 1770
0e574af1 1771 nfs_fattr_init(fattr);
1da177e4 1772
3e4f6290
TM		 1773 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1774 /* Use that stateid */
1775 } else if (state != NULL) {
08e9eac4
TM		 1776 nfs4_copy_stateid(&arg.stateid, state, current->files);
1777 } else
1da177e4
LT		 1778 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1779
cccef3b9 1780 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1781 if (status == 0 && state != NULL)
1782 renew_lease(server, timestamp);
65e4308d 1783 return status;
1da177e4
LT		 1784}
1785
659bfcd6
TM		 1786static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1787 struct nfs_fattr *fattr, struct iattr *sattr,
1788 struct nfs4_state *state)
1da177e4 1789{
3e4f6290 1790 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1791 struct nfs4_exception exception = { };
1792 int err;
1793 do {
1794 err = nfs4_handle_exception(server,
659bfcd6 1795 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1796 &exception);
1797 } while (exception.retry);
1798 return err;
1799}
1800
1801struct nfs4_closedata {
4a35bd41 1802 struct path path;
1da177e4
LT		 1803 struct inode *inode;
1804 struct nfs4_state *state;
1805 struct nfs_closeargs arg;
1806 struct nfs_closeres res;
516a6af6 1807 struct nfs_fattr fattr;
26e976a8 1808 unsigned long timestamp;
1da177e4
LT		 1809};
1810
963d8fe5 1811static void nfs4_free_closedata(void *data)
9512135d 1812{
963d8fe5
TM		 1813 struct nfs4_closedata *calldata = data;
1814 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1815
1816 nfs4_put_open_state(calldata->state);
1817 nfs_free_seqid(calldata->arg.seqid);
9512135d 1818 nfs4_put_state_owner(sp);
31f31db1 1819 path_put(&calldata->path);
9512135d
TM		 1820 kfree(calldata);
1821}
1822
88069f77
TM		 1823static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1824 fmode_t fmode)
1825{
1826 spin_lock(&state->owner->so_lock);
1827 if (!(fmode & FMODE_READ))
1828 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1829 if (!(fmode & FMODE_WRITE))
1830 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1831 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1832 spin_unlock(&state->owner->so_lock);
1833}
1834
963d8fe5 1835static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1836{
963d8fe5 1837 struct nfs4_closedata *calldata = data;
1da177e4 1838 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1839 struct nfs_server *server = NFS_SERVER(calldata->inode);
1840
19ddab06 1841 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1842 if (RPC_ASSASSINATED(task))
1843 return;
1da177e4
LT		 1844 /* hmm. we are done with the inode, and in the process of freeing
1845 * the state_owner. we keep this around to process errors
1846 */
1da177e4
LT		 1847 switch (task->tk_status) {
1848 case 0:
45328c35 1849 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1850 renew_lease(server, calldata->timestamp);
88069f77
TM		 1851 nfs4_close_clear_stateid_flags(state,
1852 calldata->arg.fmode);
1da177e4
LT		 1853 break;
1854 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1855 case -NFS4ERR_OLD_STATEID:
1856 case -NFS4ERR_BAD_STATEID:
1da177e4 1857 case -NFS4ERR_EXPIRED:
dc0b027d 1858 if (calldata->arg.fmode == 0)
9e33bed5 1859 break;
1da177e4 1860 default:
72211dbe
TM		 1861 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1862 rpc_restart_call_prepare(task);
1da177e4 1863 }
72211dbe 1864 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1865 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1866}
1867
4ce70ada 1868static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1869{
4ce70ada 1870 struct nfs4_closedata *calldata = data;
9512135d 1871 struct nfs4_state *state = calldata->state;
88069f77 1872 int call_close = 0;
9512135d 1873
963d8fe5 1874 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1875 return;
003707c7 1876
88069f77
TM		 1877 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1878 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1879 spin_lock(&state->owner->so_lock);
003707c7 1880 /* Calculate the change in open mode */
e7616923 1881 if (state->n_rdwr == 0) {
003707c7 1882 if (state->n_rdonly == 0) {
88069f77
TM		 1883 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1884 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1885 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1886 }
1887 if (state->n_wronly == 0) {
88069f77
TM		 1888 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1889 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1890 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1891 }
e7616923 1892 }
4cecb76f 1893 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1894
1895 if (!call_close) {
963d8fe5
TM		 1896 /* Note: exit _without_ calling nfs4_close_done */
1897 task->tk_action = NULL;
9512135d
TM		 1898 return;
1899 }
88069f77
TM		 1900
1901 if (calldata->arg.fmode == 0)
1902 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1903
516a6af6 1904 nfs_fattr_init(calldata->res.fattr);
26e976a8 1905 calldata->timestamp = jiffies;
19ddab06
AA		 1906 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1907 &calldata->arg.seq_args, &calldata->res.seq_res,
1908 1, task))
1909 return;
5138fde0 1910 rpc_call_start(task);
1da177e4
LT		 1911}
1912
963d8fe5 1913static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1914 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1915 .rpc_call_done = nfs4_close_done,
1916 .rpc_release = nfs4_free_closedata,
1917};
1918
1da177e4
LT		 1919/*
1920 * It is possible for data to be read/written from a mem-mapped file
1921 * after the sys_close call (which hits the vfs layer as a flush).
1922 * This means that we can't safely call nfsv4 close on a file until
1923 * the inode is cleared. This in turn means that we are not good
1924 * NFSv4 citizens - we do not indicate to the server to update the file's
1925 * share state even when we are done with one of the three share
1926 * stateid's in the inode.
1927 *
1928 * NOTE: Caller must be holding the sp->so_owner semaphore!
1929 */
8535b2be 1930int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 1931{
4a35bd41 1932 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1933 struct nfs4_closedata *calldata;
b39e625b
TM		 1934 struct nfs4_state_owner *sp = state->owner;
1935 struct rpc_task *task;
5138fde0
TM		 1936 struct rpc_message msg = {
1937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1938 .rpc_cred = state->owner->so_cred,
1939 };
c970aa85
TM		 1940 struct rpc_task_setup task_setup_data = {
1941 .rpc_client = server->client,
5138fde0 1942 .rpc_message = &msg,
c970aa85 1943 .callback_ops = &nfs4_close_ops,
101070ca 1944 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1945 .flags = RPC_TASK_ASYNC,
1946 };
9512135d 1947 int status = -ENOMEM;
1da177e4 1948
8535b2be 1949 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 1950 if (calldata == NULL)
9512135d 1951 goto out;
4a35bd41 1952 calldata->inode = state->inode;
1da177e4 1953 calldata->state = state;
4a35bd41 1954 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1955 calldata->arg.stateid = &state->open_stateid;
1da177e4 1956 /* Serialization for the sequence id */
8535b2be 1957 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 1958 if (calldata->arg.seqid == NULL)
1959 goto out_free_calldata;
dc0b027d 1960 calldata->arg.fmode = 0;
a65318bf 1961 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1962 calldata->res.fattr = &calldata->fattr;
c1d51931 1963 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1964 calldata->res.server = server;
5f7dbd5c 1965 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
f6948697
AV		 1966 path_get(path);
1967 calldata->path = *path;
9512135d 1968
5138fde0
TM		 1969 msg.rpc_argp = &calldata->arg,
1970 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1971 task_setup_data.callback_data = calldata;
1972 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1973 if (IS_ERR(task))
1974 return PTR_ERR(task);
a49c3c77
TM		 1975 status = 0;
1976 if (wait)
1977 status = rpc_wait_for_completion_task(task);
b39e625b 1978 rpc_put_task(task);
a49c3c77 1979 return status;
9512135d
TM		 1980out_free_calldata:
1981 kfree(calldata);
1982out:
b39e625b
TM		 1983 nfs4_put_open_state(state);
1984 nfs4_put_state_owner(sp);
9512135d 1985 return status;
1da177e4
LT		 1986}
1987
dc0b027d 1988static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1989{
1990 struct file *filp;
1b45c46c 1991 int ret;
02a913a7 1992
1b45c46c 1993 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1994 if (fmode & FMODE_EXEC) {
af22f94a 1995 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1996 state->owner->so_cred,
1997 nd->intent.open.flags);
1998 if (ret < 0)
1999 goto out_close;
2000 }
4a35bd41 2001 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 2002 if (!IS_ERR(filp)) {
2003 struct nfs_open_context *ctx;
cd3758e3 2004 ctx = nfs_file_open_context(filp);
02a913a7 2005 ctx->state = state;
95cf959b
TM		 2006 return 0;
2007 }
1b45c46c
TM		 2008 ret = PTR_ERR(filp);
2009out_close:
dc0b027d 2010 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 2011 return ret;
02a913a7
TM		 2012}
2013
2014struct dentry *
1da177e4
LT		 2015nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
2016{
ad389da7 2017 struct path path = {
4ac91378 2018 .mnt = nd->path.mnt,
ad389da7
TM		 2019 .dentry = dentry,
2020 };
4ac91378 2021 struct dentry *parent;
1da177e4
LT		 2022 struct iattr attr;
2023 struct rpc_cred *cred;
2024 struct nfs4_state *state;
02a913a7 2025 struct dentry *res;
dc0b027d 2026 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2027
2028 if (nd->flags & LOOKUP_CREATE) {
2029 attr.ia_mode = nd->intent.open.create_mode;
2030 attr.ia_valid = ATTR_MODE;
2031 if (!IS_POSIXACL(dir))
ce3b0f8d 2032 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2033 } else {
2034 attr.ia_valid = 0;
2035 BUG_ON(nd->intent.open.flags & O_CREAT);
2036 }
2037
98a8e323 2038 cred = rpc_lookup_cred();
1da177e4 2039 if (IS_ERR(cred))
02a913a7 2040 return (struct dentry *)cred;
565277f6
TM		 2041 parent = dentry->d_parent;
2042 /* Protect against concurrent sillydeletes */
2043 nfs_block_sillyrename(parent);
dc0b027d 2044 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2045 put_rpccred(cred);
02a913a7 2046 if (IS_ERR(state)) {
d75340cc 2047 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2048 d_add(dentry, NULL);
d75340cc
TM		 2049 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2050 }
565277f6 2051 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2052 return (struct dentry *)state;
2053 }
24ac23ab 2054 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2055 if (res != NULL)
deee9369 2056 path.dentry = res;
d75340cc 2057 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2058 nfs_unblock_sillyrename(parent);
dc0b027d 2059 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2060 return res;
1da177e4
LT		 2061}
2062
2063int
02a913a7 2064nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2065{
ad389da7 2066 struct path path = {
4ac91378 2067 .mnt = nd->path.mnt,
ad389da7
TM		 2068 .dentry = dentry,
2069 };
1da177e4
LT		 2070 struct rpc_cred *cred;
2071 struct nfs4_state *state;
dc0b027d 2072 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2073
98a8e323 2074 cred = rpc_lookup_cred();
1da177e4
LT		 2075 if (IS_ERR(cred))
2076 return PTR_ERR(cred);
dc0b027d 2077 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2078 put_rpccred(cred);
02a913a7
TM		 2079 if (IS_ERR(state)) {
2080 switch (PTR_ERR(state)) {
2081 case -EPERM:
2082 case -EACCES:
2083 case -EDQUOT:
2084 case -ENOSPC:
2085 case -EROFS:
04287f97 2086 return PTR_ERR(state);
b87c0adf
CL		 2087 default:
2088 goto out_drop;
02a913a7 2089 }
02a913a7 2090 }
24ac23ab 2091 if (state->inode == dentry->d_inode) {
d75340cc 2092 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2093 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2094 return 1;
2095 }
dc0b027d 2096 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2097out_drop:
2098 d_drop(dentry);
1da177e4
LT		 2099 return 0;
2100}
2101
1185a552 2102static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2103{
2104 if (ctx->state == NULL)
2105 return;
2106 if (is_sync)
2107 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2108 else
2109 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2110}
1da177e4
LT		 2111
2112static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2113{
43652ad5
BH		 2114 struct nfs4_server_caps_arg args = {
2115 .fhandle = fhandle,
2116 };
1da177e4
LT		 2117 struct nfs4_server_caps_res res = {};
2118 struct rpc_message msg = {
2119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2120 .rpc_argp = &args,
1da177e4
LT		 2121 .rpc_resp = &res,
2122 };
2123 int status;
2124
cccef3b9 2125 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2126 if (status == 0) {
2127 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2128 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2129 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2130 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2131 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2132 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2133 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2134 server->caps |= NFS_CAP_ACLS;
2135 if (res.has_links != 0)
2136 server->caps |= NFS_CAP_HARDLINKS;
2137 if (res.has_symlinks != 0)
2138 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2139 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2140 server->caps |= NFS_CAP_FILEID;
2141 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2142 server->caps |= NFS_CAP_MODE;
2143 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2144 server->caps |= NFS_CAP_NLINK;
2145 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2146 server->caps |= NFS_CAP_OWNER;
2147 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2148 server->caps |= NFS_CAP_OWNER_GROUP;
2149 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2150 server->caps |= NFS_CAP_ATIME;
2151 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2152 server->caps |= NFS_CAP_CTIME;
2153 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2154 server->caps |= NFS_CAP_MTIME;
2155
a65318bf
TM		 2156 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2157 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2158 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2159 server->acl_bitmask = res.acl_bitmask;
2160 }
cccef3b9 2161
1da177e4
LT		 2162 return status;
2163}
2164
55a97593 2165int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2166{
2167 struct nfs4_exception exception = { };
2168 int err;
2169 do {
2170 err = nfs4_handle_exception(server,
2171 _nfs4_server_capabilities(server, fhandle),
2172 &exception);
2173 } while (exception.retry);
2174 return err;
2175}
2176
2177static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2178 struct nfs_fsinfo *info)
2179{
1da177e4
LT		 2180 struct nfs4_lookup_root_arg args = {
2181 .bitmask = nfs4_fattr_bitmap,
2182 };
2183 struct nfs4_lookup_res res = {
2184 .server = server,
0e574af1 2185 .fattr = info->fattr,
1da177e4
LT		 2186 .fh = fhandle,
2187 };
2188 struct rpc_message msg = {
2189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2190 .rpc_argp = &args,
2191 .rpc_resp = &res,
2192 };
008f55d0 2193
0e574af1 2194 nfs_fattr_init(info->fattr);
fccba804 2195 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2196}
2197
2198static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2199 struct nfs_fsinfo *info)
2200{
2201 struct nfs4_exception exception = { };
2202 int err;
2203 do {
2204 err = nfs4_handle_exception(server,
2205 _nfs4_lookup_root(server, fhandle, info),
2206 &exception);
2207 } while (exception.retry);
2208 return err;
2209}
2210
54ceac45
DH		 2211/*
2212 * get the file handle for the "/" directory on the server
2213 */
1da177e4 2214static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2215 struct nfs_fsinfo *info)
1da177e4 2216{
1da177e4
LT		 2217 int status;
2218
1da177e4 2219 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2220 if (status == 0)
2221 status = nfs4_server_capabilities(server, fhandle);
2222 if (status == 0)
2223 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2224 return nfs4_map_errors(status);
1da177e4
LT		 2225}
2226
6b97fd3d
MN		 2227/*
2228 * Get locations and (maybe) other attributes of a referral.
2229 * Note that we'll actually follow the referral later when
2230 * we detect fsid mismatch in inode revalidation
2231 */
56659e99 2232static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2233{
2234 int status = -ENOMEM;
2235 struct page *page = NULL;
2236 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2237
2238 page = alloc_page(GFP_KERNEL);
2239 if (page == NULL)
2240 goto out;
2241 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2242 if (locations == NULL)
2243 goto out;
2244
c228fd3a 2245 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2246 if (status != 0)
2247 goto out;
2248 /* Make sure server returned a different fsid for the referral */
2249 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2250 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2251 status = -EIO;
2252 goto out;
2253 }
2254
2255 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2256 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2257 if (!fattr->mode)
2258 fattr->mode = S_IFDIR;
2259 memset(fhandle, 0, sizeof(struct nfs_fh));
2260out:
2261 if (page)
2262 __free_page(page);
2263 if (locations)
2264 kfree(locations);
2265 return status;
2266}
2267
1da177e4
LT		 2268static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2269{
2270 struct nfs4_getattr_arg args = {
2271 .fh = fhandle,
2272 .bitmask = server->attr_bitmask,
2273 };
2274 struct nfs4_getattr_res res = {
2275 .fattr = fattr,
2276 .server = server,
2277 };
2278 struct rpc_message msg = {
2279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2280 .rpc_argp = &args,
2281 .rpc_resp = &res,
2282 };
2283
0e574af1 2284 nfs_fattr_init(fattr);
cccef3b9 2285 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2286}
2287
2288static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2289{
2290 struct nfs4_exception exception = { };
2291 int err;
2292 do {
2293 err = nfs4_handle_exception(server,
2294 _nfs4_proc_getattr(server, fhandle, fattr),
2295 &exception);
2296 } while (exception.retry);
2297 return err;
2298}
2299
2300/*
2301 * The file is not closed if it is opened due to the a request to change
2302 * the size of the file. The open call will not be needed once the
2303 * VFS layer lookup-intents are implemented.
2304 *
2305 * Close is called when the inode is destroyed.
2306 * If we haven't opened the file for O_WRONLY, we
2307 * need to in the size_change case to obtain a stateid.
2308 *
2309 * Got race?
2310 * Because OPEN is always done by name in nfsv4, it is
2311 * possible that we opened a different file by the same
2312 * name. We can recognize this race condition, but we
2313 * can't do anything about it besides returning an error.
2314 *
2315 * This will be fixed with VFS changes (lookup-intent).
2316 */
2317static int
2318nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2319 struct iattr *sattr)
2320{
08e9eac4 2321 struct inode *inode = dentry->d_inode;
659bfcd6 2322 struct rpc_cred *cred = NULL;
d530838b 2323 struct nfs4_state *state = NULL;
1da177e4
LT		 2324 int status;
2325
0e574af1 2326 nfs_fattr_init(fattr);
1da177e4 2327
d530838b 2328 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2329 if (sattr->ia_valid & ATTR_FILE) {
2330 struct nfs_open_context *ctx;
2331
2332 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2333 if (ctx) {
2334 cred = ctx->cred;
2335 state = ctx->state;
2336 }
659bfcd6 2337 }
08e9eac4 2338
659bfcd6 2339 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2340 if (status == 0)
2341 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2342 return status;
2343}
2344
56659e99
TM		 2345static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2346 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2347 struct nfs_fattr *fattr)
2348{
2349 int status;
2350 struct nfs4_lookup_arg args = {
2351 .bitmask = server->attr_bitmask,
2352 .dir_fh = dirfh,
2353 .name = name,
2354 };
2355 struct nfs4_lookup_res res = {
2356 .server = server,
2357 .fattr = fattr,
2358 .fh = fhandle,
2359 };
2360 struct rpc_message msg = {
2361 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2362 .rpc_argp = &args,
2363 .rpc_resp = &res,
2364 };
2365
2366 nfs_fattr_init(fattr);
2367
2368 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2369 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2370 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2371 return status;
2372}
2373
2374static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2375 struct qstr *name, struct nfs_fh *fhandle,
2376 struct nfs_fattr *fattr)
2377{
2378 struct nfs4_exception exception = { };
2379 int err;
2380 do {
4e56e082
TM		 2381 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2382 /* FIXME: !!!! */
2383 if (err == -NFS4ERR_MOVED) {
2384 err = -EREMOTE;
2385 break;
2386 }
2387 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2388 } while (exception.retry);
2389 return err;
2390}
2391
56659e99 2392static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2393 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2394{
4e56e082 2395 int status;
1da177e4
LT		 2396
2397 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2398 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2399 if (status == -NFS4ERR_MOVED)
2400 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2401 dprintk("NFS reply lookup: %d\n", status);
2402 return status;
2403}
2404
2405static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2406{
2407 struct nfs4_exception exception = { };
2408 int err;
2409 do {
2410 err = nfs4_handle_exception(NFS_SERVER(dir),
2411 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2412 &exception);
2413 } while (exception.retry);
2414 return err;
2415}
2416
2417static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2418{
76b32999 2419 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2420 struct nfs4_accessargs args = {
2421 .fh = NFS_FH(inode),
76b32999
TM		 2422 .bitmask = server->attr_bitmask,
2423 };
2424 struct nfs4_accessres res = {
2425 .server = server,
1da177e4 2426 };
1da177e4
LT		 2427 struct rpc_message msg = {
2428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2429 .rpc_argp = &args,
2430 .rpc_resp = &res,
2431 .rpc_cred = entry->cred,
2432 };
2433 int mode = entry->mask;
2434 int status;
2435
2436 /*
2437 * Determine which access bits we want to ask for...
2438 */
2439 if (mode & MAY_READ)
2440 args.access |= NFS4_ACCESS_READ;
2441 if (S_ISDIR(inode->i_mode)) {
2442 if (mode & MAY_WRITE)
2443 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2444 if (mode & MAY_EXEC)
2445 args.access |= NFS4_ACCESS_LOOKUP;
2446 } else {
2447 if (mode & MAY_WRITE)
2448 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2449 if (mode & MAY_EXEC)
2450 args.access |= NFS4_ACCESS_EXECUTE;
2451 }
c407d41a
TM		 2452
2453 res.fattr = nfs_alloc_fattr();
2454 if (res.fattr == NULL)
2455 return -ENOMEM;
2456
cccef3b9 2457 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2458 if (!status) {
2459 entry->mask = 0;
2460 if (res.access & NFS4_ACCESS_READ)
2461 entry->mask |= MAY_READ;
2462 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2463 entry->mask |= MAY_WRITE;
2464 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2465 entry->mask |= MAY_EXEC;
c407d41a 2466 nfs_refresh_inode(inode, res.fattr);
1da177e4 2467 }
c407d41a 2468 nfs_free_fattr(res.fattr);
1da177e4
LT		 2469 return status;
2470}
2471
2472static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2473{
2474 struct nfs4_exception exception = { };
2475 int err;
2476 do {
2477 err = nfs4_handle_exception(NFS_SERVER(inode),
2478 _nfs4_proc_access(inode, entry),
2479 &exception);
2480 } while (exception.retry);
2481 return err;
2482}
2483
2484/*
2485 * TODO: For the time being, we don't try to get any attributes
2486 * along with any of the zero-copy operations READ, READDIR,
2487 * READLINK, WRITE.
2488 *
2489 * In the case of the first three, we want to put the GETATTR
2490 * after the read-type operation -- this is because it is hard
2491 * to predict the length of a GETATTR response in v4, and thus
2492 * align the READ data correctly. This means that the GETATTR
2493 * may end up partially falling into the page cache, and we should
2494 * shift it into the 'tail' of the xdr_buf before processing.
2495 * To do this efficiently, we need to know the total length
2496 * of data received, which doesn't seem to be available outside
2497 * of the RPC layer.
2498 *
2499 * In the case of WRITE, we also want to put the GETATTR after
2500 * the operation -- in this case because we want to make sure
2501 * we get the post-operation mtime and size. This means that
2502 * we can't use xdr_encode_pages() as written: we need a variant
2503 * of it which would leave room in the 'tail' iovec.
2504 *
2505 * Both of these changes to the XDR layer would in fact be quite
2506 * minor, but I decided to leave them for a subsequent patch.
2507 */
2508static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2509 unsigned int pgbase, unsigned int pglen)
2510{
2511 struct nfs4_readlink args = {
2512 .fh = NFS_FH(inode),
2513 .pgbase = pgbase,
2514 .pglen = pglen,
2515 .pages = &page,
2516 };
f50c7000 2517 struct nfs4_readlink_res res;
1da177e4
LT		 2518 struct rpc_message msg = {
2519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2520 .rpc_argp = &args,
f50c7000 2521 .rpc_resp = &res,
1da177e4
LT		 2522 };
2523
cccef3b9 2524 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2525}
2526
2527static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2528 unsigned int pgbase, unsigned int pglen)
2529{
2530 struct nfs4_exception exception = { };
2531 int err;
2532 do {
2533 err = nfs4_handle_exception(NFS_SERVER(inode),
2534 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2535 &exception);
2536 } while (exception.retry);
2537 return err;
2538}
2539
1da177e4
LT		 2540/*
2541 * Got race?
2542 * We will need to arrange for the VFS layer to provide an atomic open.
2543 * Until then, this create/open method is prone to inefficiency and race
2544 * conditions due to the lookup, create, and open VFS calls from sys_open()
2545 * placed on the wire.
2546 *
2547 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2548 * The file will be opened again in the subsequent VFS open call
2549 * (nfs4_proc_file_open).
2550 *
2551 * The open for read will just hang around to be used by any process that
2552 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2553 */
2554
2555static int
2556nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2557 int flags, struct nameidata *nd)
1da177e4 2558{
ad389da7 2559 struct path path = {
4ac91378 2560 .mnt = nd->path.mnt,
ad389da7
TM		 2561 .dentry = dentry,
2562 };
1da177e4
LT		 2563 struct nfs4_state *state;
2564 struct rpc_cred *cred;
dc0b027d 2565 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2566 int status = 0;
2567
98a8e323 2568 cred = rpc_lookup_cred();
1da177e4
LT		 2569 if (IS_ERR(cred)) {
2570 status = PTR_ERR(cred);
2571 goto out;
2572 }
dc0b027d 2573 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2574 d_drop(dentry);
1da177e4
LT		 2575 if (IS_ERR(state)) {
2576 status = PTR_ERR(state);
659bfcd6 2577 goto out_putcred;
1da177e4 2578 }
d4d9cdcb 2579 d_add(dentry, igrab(state->inode));
d75340cc 2580 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
ad389da7 2581 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2582 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2583 else
dc0b027d 2584 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2585out_putcred:
2586 put_rpccred(cred);
1da177e4
LT		 2587out:
2588 return status;
2589}
2590
2591static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2592{
16e42959 2593 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2594 struct nfs_removeargs args = {
1da177e4 2595 .fh = NFS_FH(dir),
4fdc17b2
TM		 2596 .name.len = name->len,
2597 .name.name = name->name,
16e42959
TM		 2598 .bitmask = server->attr_bitmask,
2599 };
4fdc17b2 2600 struct nfs_removeres res = {
16e42959 2601 .server = server,
1da177e4 2602 };
1da177e4 2603 struct rpc_message msg = {
4fdc17b2
TM		 2604 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2605 .rpc_argp = &args,
2606 .rpc_resp = &res,
1da177e4 2607 };
d346890b
TM		 2608 int status = -ENOMEM;
2609
2610 res.dir_attr = nfs_alloc_fattr();
2611 if (res.dir_attr == NULL)
2612 goto out;
1da177e4 2613
cccef3b9 2614 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2615 if (status == 0) {
2616 update_changeattr(dir, &res.cinfo);
d346890b 2617 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2618 }
d346890b
TM		 2619 nfs_free_fattr(res.dir_attr);
2620out:
1da177e4
LT		 2621 return status;
2622}
2623
2624static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2625{
2626 struct nfs4_exception exception = { };
2627 int err;
2628 do {
2629 err = nfs4_handle_exception(NFS_SERVER(dir),
2630 _nfs4_proc_remove(dir, name),
2631 &exception);
2632 } while (exception.retry);
2633 return err;
2634}
2635
e4eff1a6 2636static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2637{
e4eff1a6
TM		 2638 struct nfs_server *server = NFS_SERVER(dir);
2639 struct nfs_removeargs *args = msg->rpc_argp;
2640 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2641
a65318bf 2642 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2643 res->server = server;
1da177e4 2644 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2645}
2646
e4eff1a6 2647static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2648{
e4eff1a6
TM		 2649 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2650
472cfbd9 2651 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2652 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2653 return 0;
2654 update_changeattr(dir, &res->cinfo);
d346890b 2655 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2656 return 1;
1da177e4
LT		 2657}
2658
2659static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2660 struct inode *new_dir, struct qstr *new_name)
2661{
6caf2c82 2662 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2663 struct nfs4_rename_arg arg = {
2664 .old_dir = NFS_FH(old_dir),
2665 .new_dir = NFS_FH(new_dir),
2666 .old_name = old_name,
2667 .new_name = new_name,
6caf2c82
TM		 2668 .bitmask = server->attr_bitmask,
2669 };
6caf2c82
TM		 2670 struct nfs4_rename_res res = {
2671 .server = server,
1da177e4 2672 };
1da177e4
LT		 2673 struct rpc_message msg = {
2674 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2675 .rpc_argp = &arg,
2676 .rpc_resp = &res,
2677 };
011fff72 2678 int status = -ENOMEM;
1da177e4 2679
011fff72
TM		 2680 res.old_fattr = nfs_alloc_fattr();
2681 res.new_fattr = nfs_alloc_fattr();
2682 if (res.old_fattr == NULL || res.new_fattr == NULL)
2683 goto out;
1da177e4 2684
011fff72 2685 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2686 if (!status) {
2687 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2688 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2689 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2690 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2691 }
011fff72
TM		 2692out:
2693 nfs_free_fattr(res.new_fattr);
2694 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2695 return status;
2696}
2697
2698static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2699 struct inode *new_dir, struct qstr *new_name)
2700{
2701 struct nfs4_exception exception = { };
2702 int err;
2703 do {
2704 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2705 _nfs4_proc_rename(old_dir, old_name,
2706 new_dir, new_name),
2707 &exception);
2708 } while (exception.retry);
2709 return err;
2710}
2711
2712static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2713{
91ba2eee 2714 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2715 struct nfs4_link_arg arg = {
2716 .fh = NFS_FH(inode),
2717 .dir_fh = NFS_FH(dir),
2718 .name = name,
91ba2eee
TM		 2719 .bitmask = server->attr_bitmask,
2720 };
91ba2eee
TM		 2721 struct nfs4_link_res res = {
2722 .server = server,
1da177e4 2723 };
1da177e4
LT		 2724 struct rpc_message msg = {
2725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2726 .rpc_argp = &arg,
91ba2eee 2727 .rpc_resp = &res,
1da177e4 2728 };
136f2627
TM		 2729 int status = -ENOMEM;
2730
2731 res.fattr = nfs_alloc_fattr();
2732 res.dir_attr = nfs_alloc_fattr();
2733 if (res.fattr == NULL || res.dir_attr == NULL)
2734 goto out;
1da177e4 2735
cccef3b9 2736 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2737 if (!status) {
2738 update_changeattr(dir, &res.cinfo);
2739 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2740 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2741 }
136f2627
TM		 2742out:
2743 nfs_free_fattr(res.dir_attr);
2744 nfs_free_fattr(res.fattr);
1da177e4
LT		 2745 return status;
2746}
2747
2748static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2749{
2750 struct nfs4_exception exception = { };
2751 int err;
2752 do {
2753 err = nfs4_handle_exception(NFS_SERVER(inode),
2754 _nfs4_proc_link(inode, dir, name),
2755 &exception);
2756 } while (exception.retry);
2757 return err;
2758}
2759
57dc9a57
TM		 2760struct nfs4_createdata {
2761 struct rpc_message msg;
2762 struct nfs4_create_arg arg;
2763 struct nfs4_create_res res;
2764 struct nfs_fh fh;
2765 struct nfs_fattr fattr;
2766 struct nfs_fattr dir_fattr;
2767};
2768
2769static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2770 struct qstr *name, struct iattr *sattr, u32 ftype)
2771{
2772 struct nfs4_createdata *data;
2773
2774 data = kzalloc(sizeof(*data), GFP_KERNEL);
2775 if (data != NULL) {
2776 struct nfs_server *server = NFS_SERVER(dir);
2777
2778 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2779 data->msg.rpc_argp = &data->arg;
2780 data->msg.rpc_resp = &data->res;
2781 data->arg.dir_fh = NFS_FH(dir);
2782 data->arg.server = server;
2783 data->arg.name = name;
2784 data->arg.attrs = sattr;
2785 data->arg.ftype = ftype;
2786 data->arg.bitmask = server->attr_bitmask;
2787 data->res.server = server;
2788 data->res.fh = &data->fh;
2789 data->res.fattr = &data->fattr;
2790 data->res.dir_fattr = &data->dir_fattr;
2791 nfs_fattr_init(data->res.fattr);
2792 nfs_fattr_init(data->res.dir_fattr);
2793 }
2794 return data;
2795}
2796
2797static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2798{
cccef3b9
AA		 2799 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2800 &data->arg, &data->res, 1);
57dc9a57
TM		 2801 if (status == 0) {
2802 update_changeattr(dir, &data->res.dir_cinfo);
2803 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2804 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2805 }
2806 return status;
2807}
2808
2809static void nfs4_free_createdata(struct nfs4_createdata *data)
2810{
2811 kfree(data);
2812}
2813
4f390c15 2814static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2815 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2816{
57dc9a57
TM		 2817 struct nfs4_createdata *data;
2818 int status = -ENAMETOOLONG;
1da177e4 2819
94a6d753 2820 if (len > NFS4_MAXPATHLEN)
57dc9a57 2821 goto out;
4f390c15 2822
57dc9a57
TM		 2823 status = -ENOMEM;
2824 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2825 if (data == NULL)
2826 goto out;
2827
2828 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2829 data->arg.u.symlink.pages = &page;
2830 data->arg.u.symlink.len = len;
1da177e4 2831
57dc9a57
TM		 2832 status = nfs4_do_create(dir, dentry, data);
2833
2834 nfs4_free_createdata(data);
2835out:
1da177e4
LT		 2836 return status;
2837}
2838
4f390c15 2839static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2840 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2841{
2842 struct nfs4_exception exception = { };
2843 int err;
2844 do {
2845 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2846 _nfs4_proc_symlink(dir, dentry, page,
2847 len, sattr),
1da177e4
LT		 2848 &exception);
2849 } while (exception.retry);
2850 return err;
2851}
2852
2853static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2854 struct iattr *sattr)
2855{
57dc9a57
TM		 2856 struct nfs4_createdata *data;
2857 int status = -ENOMEM;
1da177e4 2858
57dc9a57
TM		 2859 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2860 if (data == NULL)
2861 goto out;
2862
2863 status = nfs4_do_create(dir, dentry, data);
2864
2865 nfs4_free_createdata(data);
2866out:
1da177e4
LT		 2867 return status;
2868}
2869
2870static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2871 struct iattr *sattr)
2872{
2873 struct nfs4_exception exception = { };
2874 int err;
2875 do {
2876 err = nfs4_handle_exception(NFS_SERVER(dir),
2877 _nfs4_proc_mkdir(dir, dentry, sattr),
2878 &exception);
2879 } while (exception.retry);
2880 return err;
2881}
2882
2883static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2884 u64 cookie, struct page *page, unsigned int count, int plus)
2885{
2886 struct inode *dir = dentry->d_inode;
2887 struct nfs4_readdir_arg args = {
2888 .fh = NFS_FH(dir),
2889 .pages = &page,
2890 .pgbase = 0,
2891 .count = count,
96d25e53 2892 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2893 };
2894 struct nfs4_readdir_res res;
2895 struct rpc_message msg = {
2896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2897 .rpc_argp = &args,
2898 .rpc_resp = &res,
2899 .rpc_cred = cred,
2900 };
2901 int status;
2902
3110ff80 2903 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2904 dentry->d_parent->d_name.name,
2905 dentry->d_name.name,
2906 (unsigned long long)cookie);
1da177e4
LT		 2907 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2908 res.pgbase = args.pgbase;
cccef3b9 2909 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2910 if (status == 0)
2911 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2912
2913 nfs_invalidate_atime(dir);
2914
3110ff80 2915 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2916 return status;
2917}
2918
2919static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2920 u64 cookie, struct page *page, unsigned int count, int plus)
2921{
2922 struct nfs4_exception exception = { };
2923 int err;
2924 do {
2925 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2926 _nfs4_proc_readdir(dentry, cred, cookie,
2927 page, count, plus),
2928 &exception);
2929 } while (exception.retry);
2930 return err;
2931}
2932
2933static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2934 struct iattr *sattr, dev_t rdev)
2935{
57dc9a57
TM		 2936 struct nfs4_createdata *data;
2937 int mode = sattr->ia_mode;
2938 int status = -ENOMEM;
1da177e4
LT		 2939
2940 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2941 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2942
2943 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2944 if (data == NULL)
2945 goto out;
2946
1da177e4 2947 if (S_ISFIFO(mode))
57dc9a57 2948 data->arg.ftype = NF4FIFO;
1da177e4 2949 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2950 data->arg.ftype = NF4BLK;
2951 data->arg.u.device.specdata1 = MAJOR(rdev);
2952 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2953 }
2954 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2955 data->arg.ftype = NF4CHR;
2956 data->arg.u.device.specdata1 = MAJOR(rdev);
2957 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2958 }
1da177e4 2959
57dc9a57
TM		 2960 status = nfs4_do_create(dir, dentry, data);
2961
2962 nfs4_free_createdata(data);
2963out:
1da177e4
LT		 2964 return status;
2965}
2966
2967static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2968 struct iattr *sattr, dev_t rdev)
2969{
2970 struct nfs4_exception exception = { };
2971 int err;
2972 do {
2973 err = nfs4_handle_exception(NFS_SERVER(dir),
2974 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2975 &exception);
2976 } while (exception.retry);
2977 return err;
2978}
2979
2980static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2981 struct nfs_fsstat *fsstat)
2982{
2983 struct nfs4_statfs_arg args = {
2984 .fh = fhandle,
2985 .bitmask = server->attr_bitmask,
2986 };
24ad148a
BH		 2987 struct nfs4_statfs_res res = {
2988 .fsstat = fsstat,
2989 };
1da177e4
LT		 2990 struct rpc_message msg = {
2991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2992 .rpc_argp = &args,
24ad148a 2993 .rpc_resp = &res,
1da177e4
LT		 2994 };
2995
0e574af1 2996 nfs_fattr_init(fsstat->fattr);
cccef3b9 2997 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2998}
2999
3000static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3001{
3002 struct nfs4_exception exception = { };
3003 int err;
3004 do {
3005 err = nfs4_handle_exception(server,
3006 _nfs4_proc_statfs(server, fhandle, fsstat),
3007 &exception);
3008 } while (exception.retry);
3009 return err;
3010}
3011
3012static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3013 struct nfs_fsinfo *fsinfo)
3014{
3015 struct nfs4_fsinfo_arg args = {
3016 .fh = fhandle,
3017 .bitmask = server->attr_bitmask,
3018 };
3dda5e43
BH		 3019 struct nfs4_fsinfo_res res = {
3020 .fsinfo = fsinfo,
3021 };
1da177e4
LT		 3022 struct rpc_message msg = {
3023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3024 .rpc_argp = &args,
3dda5e43 3025 .rpc_resp = &res,
1da177e4
LT		 3026 };
3027
cccef3b9 3028 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3029}
3030
3031static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3032{
3033 struct nfs4_exception exception = { };
3034 int err;
3035
3036 do {
3037 err = nfs4_handle_exception(server,
3038 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3039 &exception);
3040 } while (exception.retry);
3041 return err;
3042}
3043
3044static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3045{
0e574af1 3046 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3047 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3048}
3049
3050static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3051 struct nfs_pathconf *pathconf)
3052{
3053 struct nfs4_pathconf_arg args = {
3054 .fh = fhandle,
3055 .bitmask = server->attr_bitmask,
3056 };
d45b2989
BH		 3057 struct nfs4_pathconf_res res = {
3058 .pathconf = pathconf,
3059 };
1da177e4
LT		 3060 struct rpc_message msg = {
3061 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3062 .rpc_argp = &args,
d45b2989 3063 .rpc_resp = &res,
1da177e4
LT		 3064 };
3065
3066 /* None of the pathconf attributes are mandatory to implement */
3067 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3068 memset(pathconf, 0, sizeof(*pathconf));
3069 return 0;
3070 }
3071
0e574af1 3072 nfs_fattr_init(pathconf->fattr);
cccef3b9 3073 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3074}
3075
3076static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3077 struct nfs_pathconf *pathconf)
3078{
3079 struct nfs4_exception exception = { };
3080 int err;
3081
3082 do {
3083 err = nfs4_handle_exception(server,
3084 _nfs4_proc_pathconf(server, fhandle, pathconf),
3085 &exception);
3086 } while (exception.retry);
3087 return err;
3088}
3089
ec06c096 3090static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3091{
ec06c096 3092 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3093
f11c88af
AA		 3094 dprintk("--> %s\n", __func__);
3095
f11c88af
AA		 3096 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3097
9e33bed5 3098 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3099 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3100 return -EAGAIN;
1da177e4 3101 }
8850df99
TM		 3102
3103 nfs_invalidate_atime(data->inode);
1da177e4 3104 if (task->tk_status > 0)
ec06c096
TM		 3105 renew_lease(server, data->timestamp);
3106 return 0;
1da177e4
LT		 3107}
3108
bdc7f021 3109static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3110{
1da177e4 3111 data->timestamp = jiffies;
bdc7f021 3112 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3113}
3114
788e7a89 3115static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3116{
1da177e4
LT		 3117 struct inode *inode = data->inode;
3118
def6ed7e
AA		 3119 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3120 task->tk_status);
3121
9e33bed5 3122 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3123 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3124 return -EAGAIN;
1da177e4 3125 }
4f9838c7 3126 if (task->tk_status >= 0) {
1da177e4 3127 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3128 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3129 }
788e7a89 3130 return 0;
1da177e4
LT		 3131}
3132
bdc7f021 3133static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3134{
bdc7f021
TM		 3135 struct nfs_server *server = NFS_SERVER(data->inode);
3136
a65318bf 3137 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3138 data->res.server = server;
1da177e4
LT		 3139 data->timestamp = jiffies;
3140
bdc7f021 3141 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3142}
3143
788e7a89 3144static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3145{
1da177e4
LT		 3146 struct inode *inode = data->inode;
3147
21d9a851
AA		 3148 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3149 task->tk_status);
9e33bed5 3150 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3151 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3152 return -EAGAIN;
1da177e4 3153 }
9e08a3c5 3154 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3155 return 0;
1da177e4
LT		 3156}
3157
bdc7f021 3158static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3159{
788e7a89 3160 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3161
a65318bf 3162 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3163 data->res.server = server;
bdc7f021 3164 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3165}
3166
9bc4e3ca
CL		 3167struct nfs4_renewdata {
3168 struct nfs_client *client;
3169 unsigned long timestamp;
3170};
3171
1da177e4
LT		 3172/*
3173 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3174 * standalone procedure for queueing an asynchronous RENEW.
3175 */
9bc4e3ca 3176static void nfs4_renew_release(void *calldata)
dc96aef9 3177{
9bc4e3ca
CL		 3178 struct nfs4_renewdata *data = calldata;
3179 struct nfs_client *clp = data->client;
dc96aef9 3180
0851de06
AB		 3181 if (atomic_read(&clp->cl_count) > 1)
3182 nfs4_schedule_state_renewal(clp);
3183 nfs_put_client(clp);
9bc4e3ca 3184 kfree(data);
dc96aef9
AB		 3185}
3186
9bc4e3ca 3187static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3188{
9bc4e3ca
CL		 3189 struct nfs4_renewdata *data = calldata;
3190 struct nfs_client *clp = data->client;
3191 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3192
3193 if (task->tk_status < 0) {
95baa25c
TM		 3194 /* Unless we're shutting down, schedule state recovery! */
3195 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3196 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3197 return;
3198 }
3199 spin_lock(&clp->cl_lock);
3200 if (time_before(clp->cl_last_renewal,timestamp))
3201 clp->cl_last_renewal = timestamp;
3202 spin_unlock(&clp->cl_lock);
3203}
3204
963d8fe5
TM		 3205static const struct rpc_call_ops nfs4_renew_ops = {
3206 .rpc_call_done = nfs4_renew_done,
dc96aef9 3207 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3208};
3209
adfa6f98 3210int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3211{
3212 struct rpc_message msg = {
3213 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3214 .rpc_argp = clp,
b4454fe1 3215 .rpc_cred = cred,
1da177e4 3216 };
9bc4e3ca 3217 struct nfs4_renewdata *data;
1da177e4 3218
0851de06
AB		 3219 if (!atomic_inc_not_zero(&clp->cl_count))
3220 return -EIO;
9bc4e3ca
CL		 3221 data = kmalloc(sizeof(*data), GFP_KERNEL);
3222 if (data == NULL)
3223 return -ENOMEM;
3224 data->client = clp;
3225 data->timestamp = jiffies;
1da177e4 3226 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3227 &nfs4_renew_ops, data);
1da177e4
LT		 3228}
3229
adfa6f98 3230int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3231{
3232 struct rpc_message msg = {
3233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3234 .rpc_argp = clp,
b4454fe1 3235 .rpc_cred = cred,
1da177e4
LT		 3236 };
3237 unsigned long now = jiffies;
3238 int status;
3239
3240 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3241 if (status < 0)
3242 return status;
3243 spin_lock(&clp->cl_lock);
3244 if (time_before(clp->cl_last_renewal,now))
3245 clp->cl_last_renewal = now;
3246 spin_unlock(&clp->cl_lock);
3247 return 0;
3248}
3249
aa1870af
BF		 3250static inline int nfs4_server_supports_acls(struct nfs_server *server)
3251{
3252 return (server->caps & NFS_CAP_ACLS)
3253 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3254 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3255}
3256
3257/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3258 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3259 * the stack.
3260 */
3261#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3262
3263static void buf_to_pages(const void *buf, size_t buflen,
3264 struct page **pages, unsigned int *pgbase)
3265{
3266 const void *p = buf;
3267
3268 *pgbase = offset_in_page(buf);
3269 p -= *pgbase;
3270 while (p < buf + buflen) {
3271 *(pages++) = virt_to_page(p);
3272 p += PAGE_CACHE_SIZE;
3273 }
3274}
3275
e50a1c2e
BF		 3276struct nfs4_cached_acl {
3277 int cached;
3278 size_t len;
3e9d4154 3279 char data[0];
e50a1c2e
BF		 3280};
3281
3282static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3283{
3284 struct nfs_inode *nfsi = NFS_I(inode);
3285
3286 spin_lock(&inode->i_lock);
3287 kfree(nfsi->nfs4_acl);
3288 nfsi->nfs4_acl = acl;
3289 spin_unlock(&inode->i_lock);
3290}
3291
3292static void nfs4_zap_acl_attr(struct inode *inode)
3293{
3294 nfs4_set_cached_acl(inode, NULL);
3295}
3296
3297static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3298{
3299 struct nfs_inode *nfsi = NFS_I(inode);
3300 struct nfs4_cached_acl *acl;
3301 int ret = -ENOENT;
3302
3303 spin_lock(&inode->i_lock);
3304 acl = nfsi->nfs4_acl;
3305 if (acl == NULL)
3306 goto out;
3307 if (buf == NULL) /* user is just asking for length */
3308 goto out_len;
3309 if (acl->cached == 0)
3310 goto out;
3311 ret = -ERANGE; /* see getxattr(2) man page */
3312 if (acl->len > buflen)
3313 goto out;
3314 memcpy(buf, acl->data, acl->len);
3315out_len:
3316 ret = acl->len;
3317out:
3318 spin_unlock(&inode->i_lock);
3319 return ret;
3320}
3321
3322static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3323{
3324 struct nfs4_cached_acl *acl;
3325
3326 if (buf && acl_len <= PAGE_SIZE) {
3327 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3328 if (acl == NULL)
3329 goto out;
3330 acl->cached = 1;
3331 memcpy(acl->data, buf, acl_len);
3332 } else {
3333 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3334 if (acl == NULL)
3335 goto out;
3336 acl->cached = 0;
3337 }
3338 acl->len = acl_len;
3339out:
3340 nfs4_set_cached_acl(inode, acl);
3341}
3342
16b4289c 3343static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3344{
aa1870af
BF		 3345 struct page *pages[NFS4ACL_MAXPAGES];
3346 struct nfs_getaclargs args = {
3347 .fh = NFS_FH(inode),
3348 .acl_pages = pages,
3349 .acl_len = buflen,
3350 };
663c79b3
BH		 3351 struct nfs_getaclres res = {
3352 .acl_len = buflen,
3353 };
e50a1c2e 3354 void *resp_buf;
aa1870af
BF		 3355 struct rpc_message msg = {
3356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3357 .rpc_argp = &args,
663c79b3 3358 .rpc_resp = &res,
aa1870af 3359 };
e50a1c2e 3360 struct page *localpage = NULL;
aa1870af
BF		 3361 int ret;
3362
e50a1c2e
BF		 3363 if (buflen < PAGE_SIZE) {
3364 /* As long as we're doing a round trip to the server anyway,
3365 * let's be prepared for a page of acl data. */
3366 localpage = alloc_page(GFP_KERNEL);
3367 resp_buf = page_address(localpage);
3368 if (localpage == NULL)
3369 return -ENOMEM;
3370 args.acl_pages[0] = localpage;
3371 args.acl_pgbase = 0;
663c79b3 3372 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3373 } else {
3374 resp_buf = buf;
3375 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3376 }
cccef3b9 3377 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3378 if (ret)
3379 goto out_free;
663c79b3
BH		 3380 if (res.acl_len > args.acl_len)
3381 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3382 else
663c79b3 3383 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3384 if (buf) {
3385 ret = -ERANGE;
663c79b3 3386 if (res.acl_len > buflen)
e50a1c2e
BF		 3387 goto out_free;
3388 if (localpage)
663c79b3 3389 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3390 }
663c79b3 3391 ret = res.acl_len;
e50a1c2e
BF		 3392out_free:
3393 if (localpage)
3394 __free_page(localpage);
aa1870af
BF		 3395 return ret;
3396}
3397
16b4289c
TM		 3398static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3399{
3400 struct nfs4_exception exception = { };
3401 ssize_t ret;
3402 do {
3403 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3404 if (ret >= 0)
3405 break;
3406 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3407 } while (exception.retry);
3408 return ret;
3409}
3410
e50a1c2e
BF		 3411static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3412{
3413 struct nfs_server *server = NFS_SERVER(inode);
3414 int ret;
3415
3416 if (!nfs4_server_supports_acls(server))
3417 return -EOPNOTSUPP;
3418 ret = nfs_revalidate_inode(server, inode);
3419 if (ret < 0)
3420 return ret;
3421 ret = nfs4_read_cached_acl(inode, buf, buflen);
3422 if (ret != -ENOENT)
3423 return ret;
3424 return nfs4_get_acl_uncached(inode, buf, buflen);
3425}
3426
16b4289c 3427static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3428{
3429 struct nfs_server *server = NFS_SERVER(inode);
3430 struct page *pages[NFS4ACL_MAXPAGES];
3431 struct nfs_setaclargs arg = {
3432 .fh = NFS_FH(inode),
3433 .acl_pages = pages,
3434 .acl_len = buflen,
3435 };
73c403a9 3436 struct nfs_setaclres res;
4b580ee3
BF		 3437 struct rpc_message msg = {
3438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3439 .rpc_argp = &arg,
73c403a9 3440 .rpc_resp = &res,
4b580ee3
BF		 3441 };
3442 int ret;
3443
3444 if (!nfs4_server_supports_acls(server))
3445 return -EOPNOTSUPP;
642ac549 3446 nfs_inode_return_delegation(inode);
4b580ee3 3447 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3448 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3449 nfs_access_zap_cache(inode);
3450 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3451 return ret;
3452}
3453
16b4289c
TM		 3454static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3455{
3456 struct nfs4_exception exception = { };
3457 int err;
3458 do {
3459 err = nfs4_handle_exception(NFS_SERVER(inode),
3460 __nfs4_proc_set_acl(inode, buf, buflen),
3461 &exception);
3462 } while (exception.retry);
3463 return err;
3464}
3465
1da177e4 3466static int
8328d59f 3467_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3468{
1da177e4
LT		 3469 if (!clp || task->tk_status >= 0)
3470 return 0;
3471 switch(task->tk_status) {
9e33bed5
TM		 3472 case -NFS4ERR_ADMIN_REVOKED:
3473 case -NFS4ERR_BAD_STATEID:
3474 case -NFS4ERR_OPENMODE:
3475 if (state == NULL)
3476 break;
3477 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3478 goto do_state_recovery;
1da177e4 3479 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3480 if (state == NULL)
3481 break;
3482 nfs4_state_mark_reclaim_reboot(clp, state);
3483 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3484 case -NFS4ERR_EXPIRED:
a2c0b9e2 3485 goto do_state_recovery;
4745e315
AA		 3486#if defined(CONFIG_NFS_V4_1)
3487 case -NFS4ERR_BADSESSION:
3488 case -NFS4ERR_BADSLOT:
3489 case -NFS4ERR_BAD_HIGH_SLOT:
3490 case -NFS4ERR_DEADSESSION:
3491 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3492 case -NFS4ERR_SEQ_FALSE_RETRY:
3493 case -NFS4ERR_SEQ_MISORDERED:
3494 dprintk("%s ERROR %d, Reset session\n", __func__,
3495 task->tk_status);
0b9e2d41 3496 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3497 task->tk_status = 0;
3498 return -EAGAIN;
3499#endif /* CONFIG_NFS_V4_1 */
1da177e4 3500 case -NFS4ERR_DELAY:
8328d59f
AA		 3501 if (server)
3502 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3503 case -NFS4ERR_GRACE:
2c643488 3504 case -EKEYEXPIRED:
1da177e4
LT		 3505 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3506 task->tk_status = 0;
3507 return -EAGAIN;
3508 case -NFS4ERR_OLD_STATEID:
3509 task->tk_status = 0;
3510 return -EAGAIN;
3511 }
3512 task->tk_status = nfs4_map_errors(task->tk_status);
3513 return 0;
a2c0b9e2
TM		 3514do_state_recovery:
3515 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3516 nfs4_schedule_state_recovery(clp);
3517 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3518 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3519 task->tk_status = 0;
3520 return -EAGAIN;
1da177e4
LT		 3521}
3522
8328d59f
AA		 3523static int
3524nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3525{
3526 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3527}
3528
bb8b27e5
TM		 3529int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3530 unsigned short port, struct rpc_cred *cred,
3531 struct nfs4_setclientid_res *res)
1da177e4
LT		 3532{
3533 nfs4_verifier sc_verifier;
3534 struct nfs4_setclientid setclientid = {
3535 .sc_verifier = &sc_verifier,
3536 .sc_prog = program,
3537 };
3538 struct rpc_message msg = {
3539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3540 .rpc_argp = &setclientid,
bb8b27e5 3541 .rpc_resp = res,
286d7d6a 3542 .rpc_cred = cred,
1da177e4 3543 };
bc4785cd 3544 __be32 *p;
1da177e4
LT		 3545 int loop = 0;
3546 int status;
3547
bc4785cd 3548 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3549 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3550 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3551
3552 for(;;) {
3553 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3554 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3555 clp->cl_ipaddr,
3556 rpc_peeraddr2str(clp->cl_rpcclient,
3557 RPC_DISPLAY_ADDR),
69dd716c
TM		 3558 rpc_peeraddr2str(clp->cl_rpcclient,
3559 RPC_DISPLAY_PROTO),
78ea323b 3560 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3561 clp->cl_id_uniquifier);
3562 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3563 sizeof(setclientid.sc_netid),
3564 rpc_peeraddr2str(clp->cl_rpcclient,
3565 RPC_DISPLAY_NETID));
1da177e4 3566 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3567 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3568 clp->cl_ipaddr, port >> 8, port & 255);
3569
3570 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3571 if (status != -NFS4ERR_CLID_INUSE)
3572 break;
3573 if (signalled())
3574 break;
3575 if (loop++ & 1)
3576 ssleep(clp->cl_lease_time + 1);
3577 else
3578 if (++clp->cl_id_uniquifier == 0)
3579 break;
3580 }
3581 return status;
3582}
3583
bb8b27e5
TM		 3584static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3585 struct nfs4_setclientid_res *arg,
3586 struct rpc_cred *cred)
1da177e4
LT		 3587{
3588 struct nfs_fsinfo fsinfo;
3589 struct rpc_message msg = {
3590 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3591 .rpc_argp = arg,
1da177e4 3592 .rpc_resp = &fsinfo,
286d7d6a 3593 .rpc_cred = cred,
1da177e4
LT		 3594 };
3595 unsigned long now;
3596 int status;
3597
3598 now = jiffies;
3599 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3600 if (status == 0) {
3601 spin_lock(&clp->cl_lock);
3602 clp->cl_lease_time = fsinfo.lease_time * HZ;
3603 clp->cl_last_renewal = now;
3604 spin_unlock(&clp->cl_lock);
3605 }
3606 return status;
3607}
3608
bb8b27e5
TM		 3609int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3610 struct nfs4_setclientid_res *arg,
3611 struct rpc_cred *cred)
51581f3b 3612{
77e03677 3613 long timeout = 0;
51581f3b
TM		 3614 int err;
3615 do {
bb8b27e5 3616 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3617 switch (err) {
3618 case 0:
3619 return err;
3620 case -NFS4ERR_RESOURCE:
3621 /* The IBM lawyers misread another document! */
3622 case -NFS4ERR_DELAY:
2c643488 3623 case -EKEYEXPIRED:
51581f3b
TM		 3624 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3625 }
3626 } while (err == 0);
3627 return err;
3628}
3629
fe650407
TM		 3630struct nfs4_delegreturndata {
3631 struct nfs4_delegreturnargs args;
fa178f29 3632 struct nfs4_delegreturnres res;
fe650407
TM		 3633 struct nfs_fh fh;
3634 nfs4_stateid stateid;
26e976a8 3635 unsigned long timestamp;
fa178f29 3636 struct nfs_fattr fattr;
fe650407
TM		 3637 int rpc_status;
3638};
3639
fe650407
TM		 3640static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3641{
3642 struct nfs4_delegreturndata *data = calldata;
938e1010 3643
d61e612a
TM		 3644 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3645 task->tk_status);
938e1010 3646
79708861
RL		 3647 switch (task->tk_status) {
3648 case -NFS4ERR_STALE_STATEID:
3649 case -NFS4ERR_EXPIRED:
3650 case 0:
fa178f29 3651 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3652 break;
3653 default:
3654 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3655 -EAGAIN) {
3656 nfs_restart_rpc(task, data->res.server->nfs_client);
3657 return;
3658 }
3659 }
3660 data->rpc_status = task->tk_status;
fe650407
TM		 3661}
3662
3663static void nfs4_delegreturn_release(void *calldata)
3664{
fe650407
TM		 3665 kfree(calldata);
3666}
3667
938e1010
AA		 3668#if defined(CONFIG_NFS_V4_1)
3669static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3670{
3671 struct nfs4_delegreturndata *d_data;
3672
3673 d_data = (struct nfs4_delegreturndata *)data;
3674
3675 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3676 &d_data->args.seq_args,
3677 &d_data->res.seq_res, 1, task))
3678 return;
3679 rpc_call_start(task);
3680}
3681#endif /* CONFIG_NFS_V4_1 */
3682
c8d149f3 3683static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3684#if defined(CONFIG_NFS_V4_1)
3685 .rpc_call_prepare = nfs4_delegreturn_prepare,
3686#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3687 .rpc_call_done = nfs4_delegreturn_done,
3688 .rpc_release = nfs4_delegreturn_release,
3689};
3690
e6f81075 3691static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3692{
3693 struct nfs4_delegreturndata *data;
fa178f29 3694 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3695 struct rpc_task *task;
5138fde0
TM		 3696 struct rpc_message msg = {
3697 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3698 .rpc_cred = cred,
3699 };
c970aa85
TM		 3700 struct rpc_task_setup task_setup_data = {
3701 .rpc_client = server->client,
5138fde0 3702 .rpc_message = &msg,
c970aa85
TM		 3703 .callback_ops = &nfs4_delegreturn_ops,
3704 .flags = RPC_TASK_ASYNC,
3705 };
e6f81075 3706 int status = 0;
fe650407 3707
8535b2be 3708 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3709 if (data == NULL)
3710 return -ENOMEM;
3711 data->args.fhandle = &data->fh;
3712 data->args.stateid = &data->stateid;
fa178f29 3713 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3714 nfs_copy_fh(&data->fh, NFS_FH(inode));
3715 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3716 data->res.fattr = &data->fattr;
3717 data->res.server = server;
5f7dbd5c 3718 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3719 nfs_fattr_init(data->res.fattr);
26e976a8 3720 data->timestamp = jiffies;
fe650407
TM		 3721 data->rpc_status = 0;
3722
c970aa85 3723 task_setup_data.callback_data = data;
5138fde0
TM		 3724 msg.rpc_argp = &data->args,
3725 msg.rpc_resp = &data->res,
c970aa85 3726 task = rpc_run_task(&task_setup_data);
7a1218a2 3727 if (IS_ERR(task))
fe650407 3728 return PTR_ERR(task);
e6f81075
TM		 3729 if (!issync)
3730 goto out;
fe650407 3731 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3732 if (status != 0)
3733 goto out;
3734 status = data->rpc_status;
3735 if (status != 0)
3736 goto out;
3737 nfs_refresh_inode(inode, &data->fattr);
3738out:
e6b3c4db 3739 rpc_put_task(task);
fe650407 3740 return status;
1da177e4
LT		 3741}
3742
e6f81075 3743int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3744{
3745 struct nfs_server *server = NFS_SERVER(inode);
3746 struct nfs4_exception exception = { };
3747 int err;
3748 do {
e6f81075 3749 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3750 switch (err) {
3751 case -NFS4ERR_STALE_STATEID:
3752 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3753 case 0:
3754 return 0;
3755 }
3756 err = nfs4_handle_exception(server, err, &exception);
3757 } while (exception.retry);
3758 return err;
3759}
3760
3761#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3762#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3763
3764/*
3765 * sleep, with exponential backoff, and retry the LOCK operation.
3766 */
3767static unsigned long
3768nfs4_set_lock_task_retry(unsigned long timeout)
3769{
150030b7 3770 schedule_timeout_killable(timeout);
1da177e4
LT		 3771 timeout <<= 1;
3772 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3773 return NFS4_LOCK_MAXTIMEOUT;
3774 return timeout;
3775}
3776
1da177e4
LT		 3777static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3778{
3779 struct inode *inode = state->inode;
3780 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3781 struct nfs_client *clp = server->nfs_client;
911d1aaf 3782 struct nfs_lockt_args arg = {
1da177e4 3783 .fh = NFS_FH(inode),
911d1aaf 3784 .fl = request,
1da177e4 3785 };
911d1aaf
TM		 3786 struct nfs_lockt_res res = {
3787 .denied = request,
1da177e4
LT		 3788 };
3789 struct rpc_message msg = {
3790 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3791 .rpc_argp = &arg,
3792 .rpc_resp = &res,
3793 .rpc_cred = state->owner->so_cred,
3794 };
1da177e4
LT		 3795 struct nfs4_lock_state *lsp;
3796 int status;
3797
911d1aaf 3798 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3799 status = nfs4_set_lock_state(state, request);
3800 if (status != 0)
3801 goto out;
3802 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3803 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3804 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3805 switch (status) {
3806 case 0:
3807 request->fl_type = F_UNLCK;
3808 break;
3809 case -NFS4ERR_DENIED:
3810 status = 0;
1da177e4 3811 }
70cc6487 3812 request->fl_ops->fl_release_private(request);
8d0a8a9d 3813out:
1da177e4
LT		 3814 return status;
3815}
3816
3817static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3818{
3819 struct nfs4_exception exception = { };
3820 int err;
3821
3822 do {
3823 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3824 _nfs4_proc_getlk(state, cmd, request),
3825 &exception);
3826 } while (exception.retry);
3827 return err;
3828}
3829
3830static int do_vfs_lock(struct file *file, struct file_lock *fl)
3831{
3832 int res = 0;
3833 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3834 case FL_POSIX:
3835 res = posix_lock_file_wait(file, fl);
3836 break;
3837 case FL_FLOCK:
3838 res = flock_lock_file_wait(file, fl);
3839 break;
3840 default:
3841 BUG();
3842 }
1da177e4
LT		 3843 return res;
3844}
3845
faf5f49c 3846struct nfs4_unlockdata {
911d1aaf
TM		 3847 struct nfs_locku_args arg;
3848 struct nfs_locku_res res;
faf5f49c
TM		 3849 struct nfs4_lock_state *lsp;
3850 struct nfs_open_context *ctx;
911d1aaf
TM		 3851 struct file_lock fl;
3852 const struct nfs_server *server;
26e976a8 3853 unsigned long timestamp;
faf5f49c
TM		 3854};
3855
911d1aaf
TM		 3856static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3857 struct nfs_open_context *ctx,
3858 struct nfs4_lock_state *lsp,
3859 struct nfs_seqid *seqid)
3860{
3861 struct nfs4_unlockdata *p;
3862 struct inode *inode = lsp->ls_state->inode;
3863
8535b2be 3864 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3865 if (p == NULL)
3866 return NULL;
3867 p->arg.fh = NFS_FH(inode);
3868 p->arg.fl = &p->fl;
3869 p->arg.seqid = seqid;
c1d51931 3870 p->res.seqid = seqid;
5f7dbd5c 3871 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3872 p->arg.stateid = &lsp->ls_stateid;
3873 p->lsp = lsp;
3874 atomic_inc(&lsp->ls_count);
3875 /* Ensure we don't close file until we're done freeing locks! */
3876 p->ctx = get_nfs_open_context(ctx);
3877 memcpy(&p->fl, fl, sizeof(p->fl));
3878 p->server = NFS_SERVER(inode);
3879 return p;
3880}
3881
06f814a3 3882static void nfs4_locku_release_calldata(void *data)
faf5f49c 3883{
963d8fe5 3884 struct nfs4_unlockdata *calldata = data;
911d1aaf 3885 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3886 nfs4_put_lock_state(calldata->lsp);
3887 put_nfs_open_context(calldata->ctx);
3888 kfree(calldata);
faf5f49c
TM		 3889}
3890
963d8fe5 3891static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3892{
963d8fe5 3893 struct nfs4_unlockdata *calldata = data;
faf5f49c 3894
a893693c
AA		 3895 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3896 task->tk_status);
06f814a3
TM		 3897 if (RPC_ASSASSINATED(task))
3898 return;
faf5f49c
TM		 3899 switch (task->tk_status) {
3900 case 0:
3901 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3902 calldata->res.stateid.data,
faf5f49c 3903 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3904 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3905 break;
9e33bed5
TM		 3906 case -NFS4ERR_BAD_STATEID:
3907 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3908 case -NFS4ERR_STALE_STATEID:
3909 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3910 break;
3911 default:
9e33bed5 3912 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3913 nfs_restart_rpc(task,
d61e612a 3914 calldata->server->nfs_client);
faf5f49c 3915 }
faf5f49c
TM		 3916}
3917
4ce70ada 3918static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3919{
4ce70ada 3920 struct nfs4_unlockdata *calldata = data;
faf5f49c 3921
911d1aaf 3922 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3923 return;
3924 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3925 /* Note: exit _without_ running nfs4_locku_done */
3926 task->tk_action = NULL;
faf5f49c
TM		 3927 return;
3928 }
26e976a8 3929 calldata->timestamp = jiffies;
a893693c
AA		 3930 if (nfs4_setup_sequence(calldata->server->nfs_client,
3931 &calldata->arg.seq_args,
3932 &calldata->res.seq_res, 1, task))
3933 return;
5138fde0 3934 rpc_call_start(task);
faf5f49c
TM		 3935}
3936
963d8fe5 3937static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3938 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3939 .rpc_call_done = nfs4_locku_done,
06f814a3 3940 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3941};
3942
a5d16a4d
TM		 3943static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3944 struct nfs_open_context *ctx,
3945 struct nfs4_lock_state *lsp,
3946 struct nfs_seqid *seqid)
3947{
3948 struct nfs4_unlockdata *data;
5138fde0
TM		 3949 struct rpc_message msg = {
3950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3951 .rpc_cred = ctx->cred,
3952 };
c970aa85
TM		 3953 struct rpc_task_setup task_setup_data = {
3954 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3955 .rpc_message = &msg,
c970aa85 3956 .callback_ops = &nfs4_locku_ops,
101070ca 3957 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3958 .flags = RPC_TASK_ASYNC,
3959 };
a5d16a4d 3960
137d6aca
FF		 3961 /* Ensure this is an unlock - when canceling a lock, the
3962 * canceled lock is passed in, and it won't be an unlock.
3963 */
3964 fl->fl_type = F_UNLCK;
3965
a5d16a4d
TM		 3966 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3967 if (data == NULL) {
3968 nfs_free_seqid(seqid);
3969 return ERR_PTR(-ENOMEM);
3970 }
3971
5138fde0
TM		 3972 msg.rpc_argp = &data->arg,
3973 msg.rpc_resp = &data->res,
c970aa85
TM		 3974 task_setup_data.callback_data = data;
3975 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3976}
3977
faf5f49c
TM		 3978static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3979{
19e03c57 3980 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3981 struct nfs_seqid *seqid;
1da177e4 3982 struct nfs4_lock_state *lsp;
06f814a3
TM		 3983 struct rpc_task *task;
3984 int status = 0;
536ff0f8 3985 unsigned char fl_flags = request->fl_flags;
faf5f49c 3986
8d0a8a9d 3987 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3988 /* Unlock _before_ we do the RPC call */
3989 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3990 down_read(&nfsi->rwsem);
3991 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3992 up_read(&nfsi->rwsem);
9b073574 3993 goto out;
19e03c57
TM		 3994 }
3995 up_read(&nfsi->rwsem);
8d0a8a9d 3996 if (status != 0)
9b073574
TM		 3997 goto out;
3998 /* Is this a delegated lock? */
3999 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4000 goto out;
8d0a8a9d 4001 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4002 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4003 status = -ENOMEM;
911d1aaf 4004 if (seqid == NULL)
9b073574 4005 goto out;
cd3758e3 4006 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4007 status = PTR_ERR(task);
4008 if (IS_ERR(task))
9b073574 4009 goto out;
a5d16a4d 4010 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4011 rpc_put_task(task);
9b073574 4012out:
536ff0f8 4013 request->fl_flags = fl_flags;
1da177e4
LT		 4014 return status;
4015}
4016
a5d16a4d
TM		 4017struct nfs4_lockdata {
4018 struct nfs_lock_args arg;
4019 struct nfs_lock_res res;
4020 struct nfs4_lock_state *lsp;
4021 struct nfs_open_context *ctx;
4022 struct file_lock fl;
26e976a8 4023 unsigned long timestamp;
a5d16a4d
TM		 4024 int rpc_status;
4025 int cancelled;
66179efe 4026 struct nfs_server *server;
a5d16a4d
TM		 4027};
4028
4029static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4030 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4031 gfp_t gfp_mask)
1da177e4 4032{
a5d16a4d
TM		 4033 struct nfs4_lockdata *p;
4034 struct inode *inode = lsp->ls_state->inode;
1da177e4 4035 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4036
8535b2be 4037 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4038 if (p == NULL)
4039 return NULL;
4040
4041 p->arg.fh = NFS_FH(inode);
4042 p->arg.fl = &p->fl;
8535b2be 4043 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4044 if (p->arg.open_seqid == NULL)
4045 goto out_free;
8535b2be 4046 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4047 if (p->arg.lock_seqid == NULL)
2f74c0a0 4048 goto out_free_seqid;
a5d16a4d 4049 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4050 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4051 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 4052 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 4053 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 4054 p->lsp = lsp;
66179efe 4055 p->server = server;
a5d16a4d
TM		 4056 atomic_inc(&lsp->ls_count);
4057 p->ctx = get_nfs_open_context(ctx);
4058 memcpy(&p->fl, fl, sizeof(p->fl));
4059 return p;
2f74c0a0
TM		 4060out_free_seqid:
4061 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4062out_free:
4063 kfree(p);
4064 return NULL;
4065}
4066
4067static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4068{
4069 struct nfs4_lockdata *data = calldata;
4070 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4071
3110ff80 4072 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4073 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4074 return;
a5d16a4d
TM		 4075 /* Do we need to do an open_to_lock_owner? */
4076 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4077 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4078 return;
a5d16a4d
TM		 4079 data->arg.open_stateid = &state->stateid;
4080 data->arg.new_lock_owner = 1;
c1d51931 4081 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4082 } else
4083 data->arg.new_lock_owner = 0;
26e976a8 4084 data->timestamp = jiffies;
66179efe
AA		 4085 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
4086 &data->res.seq_res, 1, task))
4087 return;
5138fde0 4088 rpc_call_start(task);
3110ff80 4089 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4090}
4091
b257957e
AB		 4092static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4093{
4094 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4095 nfs4_lock_prepare(task, calldata);
4096}
4097
a5d16a4d
TM		 4098static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4099{
4100 struct nfs4_lockdata *data = calldata;
4101
3110ff80 4102 dprintk("%s: begin!\n", __func__);
a5d16a4d 4103
d61e612a
TM		 4104 nfs4_sequence_done(data->server, &data->res.seq_res,
4105 task->tk_status);
66179efe 4106
a5d16a4d
TM		 4107 data->rpc_status = task->tk_status;
4108 if (RPC_ASSASSINATED(task))
4109 goto out;
4110 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4111 if (data->rpc_status == 0)
4112 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4113 else
4114 goto out;
4115 }
4116 if (data->rpc_status == 0) {
4117 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4118 sizeof(data->lsp->ls_stateid.data));
4119 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4120 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4121 }
a5d16a4d 4122out:
3110ff80 4123 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4124}
4125
4126static void nfs4_lock_release(void *calldata)
4127{
4128 struct nfs4_lockdata *data = calldata;
4129
3110ff80 4130 dprintk("%s: begin!\n", __func__);
2f74c0a0 4131 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4132 if (data->cancelled != 0) {
4133 struct rpc_task *task;
4134 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4135 data->arg.lock_seqid);
4136 if (!IS_ERR(task))
e6b3c4db 4137 rpc_put_task(task);
3110ff80 4138 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4139 } else
4140 nfs_free_seqid(data->arg.lock_seqid);
4141 nfs4_put_lock_state(data->lsp);
4142 put_nfs_open_context(data->ctx);
4143 kfree(data);
3110ff80 4144 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4145}
4146
4147static const struct rpc_call_ops nfs4_lock_ops = {
4148 .rpc_call_prepare = nfs4_lock_prepare,
4149 .rpc_call_done = nfs4_lock_done,
4150 .rpc_release = nfs4_lock_release,
4151};
4152
b257957e
AB		 4153static const struct rpc_call_ops nfs4_recover_lock_ops = {
4154 .rpc_call_prepare = nfs4_recover_lock_prepare,
4155 .rpc_call_done = nfs4_lock_done,
4156 .rpc_release = nfs4_lock_release,
4157};
4158
2bee72a6
TM		 4159static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4160{
4161 struct nfs_client *clp = server->nfs_client;
4162 struct nfs4_state *state = lsp->ls_state;
4163
4164 switch (error) {
4165 case -NFS4ERR_ADMIN_REVOKED:
4166 case -NFS4ERR_BAD_STATEID:
4167 case -NFS4ERR_EXPIRED:
4168 if (new_lock_owner != 0 ||
4169 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4170 nfs4_state_mark_reclaim_nograce(clp, state);
4171 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4172 break;
4173 case -NFS4ERR_STALE_STATEID:
4174 if (new_lock_owner != 0 ||
4175 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4176 nfs4_state_mark_reclaim_reboot(clp, state);
4177 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4178 };
4179}
4180
afe6c27c 4181static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4182{
4183 struct nfs4_lockdata *data;
4184 struct rpc_task *task;
5138fde0
TM		 4185 struct rpc_message msg = {
4186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4187 .rpc_cred = state->owner->so_cred,
4188 };
c970aa85
TM		 4189 struct rpc_task_setup task_setup_data = {
4190 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4191 .rpc_message = &msg,
c970aa85 4192 .callback_ops = &nfs4_lock_ops,
101070ca 4193 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4194 .flags = RPC_TASK_ASYNC,
4195 };
a5d16a4d
TM		 4196 int ret;
4197
3110ff80 4198 dprintk("%s: begin!\n", __func__);
cd3758e3 4199 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4200 fl->fl_u.nfs4_fl.owner,
4201 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4202 if (data == NULL)
4203 return -ENOMEM;
4204 if (IS_SETLKW(cmd))
4205 data->arg.block = 1;
b257957e
AB		 4206 if (recovery_type > NFS_LOCK_NEW) {
4207 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4208 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4209 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4210 }
5138fde0
TM		 4211 msg.rpc_argp = &data->arg,
4212 msg.rpc_resp = &data->res,
c970aa85
TM		 4213 task_setup_data.callback_data = data;
4214 task = rpc_run_task(&task_setup_data);
7a1218a2 4215 if (IS_ERR(task))
a5d16a4d 4216 return PTR_ERR(task);
a5d16a4d
TM		 4217 ret = nfs4_wait_for_completion_rpc_task(task);
4218 if (ret == 0) {
4219 ret = data->rpc_status;
2bee72a6
TM		 4220 if (ret)
4221 nfs4_handle_setlk_error(data->server, data->lsp,
4222 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4223 } else
4224 data->cancelled = 1;
e6b3c4db 4225 rpc_put_task(task);
3110ff80 4226 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4227 return ret;
1da177e4
LT		 4228}
4229
4230static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4231{
202b50dc
TM		 4232 struct nfs_server *server = NFS_SERVER(state->inode);
4233 struct nfs4_exception exception = { };
4234 int err;
4235
4236 do {
42a2d13e
TM		 4237 /* Cache the lock if possible... */
4238 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4239 return 0;
afe6c27c 4240 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4241 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4242 break;
4243 nfs4_handle_exception(server, err, &exception);
4244 } while (exception.retry);
4245 return err;
1da177e4
LT		 4246}
4247
4248static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4249{
202b50dc
TM		 4250 struct nfs_server *server = NFS_SERVER(state->inode);
4251 struct nfs4_exception exception = { };
4252 int err;
4253
6bfc93ef
TM		 4254 err = nfs4_set_lock_state(state, request);
4255 if (err != 0)
4256 return err;
202b50dc 4257 do {
42a2d13e
TM		 4258 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4259 return 0;
afe6c27c 4260 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4261 switch (err) {
4262 default:
4263 goto out;
4264 case -NFS4ERR_GRACE:
4265 case -NFS4ERR_DELAY:
2c643488 4266 case -EKEYEXPIRED:
a9ed2e25
TM		 4267 nfs4_handle_exception(server, err, &exception);
4268 err = 0;
4269 }
202b50dc 4270 } while (exception.retry);
a9ed2e25 4271out:
202b50dc 4272 return err;
1da177e4
LT		 4273}
4274
4275static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4276{
19e03c57 4277 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4278 unsigned char fl_flags = request->fl_flags;
8e469ebd 4279 int status = -ENOLCK;
1da177e4 4280
8e469ebd
TM		 4281 if ((fl_flags & FL_POSIX) &&
4282 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4283 goto out;
6bfc93ef 4284 /* Is this a delegated open? */
6bfc93ef
TM		 4285 status = nfs4_set_lock_state(state, request);
4286 if (status != 0)
4287 goto out;
01c3b861
TM		 4288 request->fl_flags |= FL_ACCESS;
4289 status = do_vfs_lock(request->fl_file, request);
4290 if (status < 0)
4291 goto out;
19e03c57 4292 down_read(&nfsi->rwsem);
01c3b861 4293 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4294 /* Yes: cache locks! */
01c3b861 4295 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4296 request->fl_flags = fl_flags & ~FL_SLEEP;
4297 status = do_vfs_lock(request->fl_file, request);
4298 goto out_unlock;
01c3b861 4299 }
afe6c27c 4300 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4301 if (status != 0)
01c3b861 4302 goto out_unlock;
6bfc93ef 4303 /* Note: we always want to sleep here! */
01c3b861 4304 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4305 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4306 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4307out_unlock:
19e03c57 4308 up_read(&nfsi->rwsem);
01c3b861
TM		 4309out:
4310 request->fl_flags = fl_flags;
1da177e4
LT		 4311 return status;
4312}
4313
4314static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4315{
4316 struct nfs4_exception exception = { };
4317 int err;
4318
4319 do {
965b5d67
TM		 4320 err = _nfs4_proc_setlk(state, cmd, request);
4321 if (err == -NFS4ERR_DENIED)
4322 err = -EAGAIN;
1da177e4 4323 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4324 err, &exception);
1da177e4
LT		 4325 } while (exception.retry);
4326 return err;
4327}
4328
4329static int
4330nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4331{
4332 struct nfs_open_context *ctx;
4333 struct nfs4_state *state;
4334 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4335 int status;
4336
4337 /* verify open state */
cd3758e3 4338 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4339 state = ctx->state;
4340
4341 if (request->fl_start < 0 || request->fl_end < 0)
4342 return -EINVAL;
4343
d953126a
TM		 4344 if (IS_GETLK(cmd)) {
4345 if (state != NULL)
4346 return nfs4_proc_getlk(state, F_GETLK, request);
4347 return 0;
4348 }
1da177e4
LT		 4349
4350 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4351 return -EINVAL;
4352
d953126a
TM		 4353 if (request->fl_type == F_UNLCK) {
4354 if (state != NULL)
4355 return nfs4_proc_unlck(state, cmd, request);
4356 return 0;
4357 }
1da177e4 4358
d953126a
TM		 4359 if (state == NULL)
4360 return -ENOLCK;
1da177e4
LT		 4361 do {
4362 status = nfs4_proc_setlk(state, cmd, request);
4363 if ((status != -EAGAIN) || IS_SETLK(cmd))
4364 break;
4365 timeout = nfs4_set_lock_task_retry(timeout);
4366 status = -ERESTARTSYS;
4367 if (signalled())
4368 break;
4369 } while(status < 0);
1da177e4
LT		 4370 return status;
4371}
4372
888e694c
TM		 4373int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4374{
4375 struct nfs_server *server = NFS_SERVER(state->inode);
4376 struct nfs4_exception exception = { };
4377 int err;
4378
4379 err = nfs4_set_lock_state(state, fl);
4380 if (err != 0)
4381 goto out;
4382 do {
afe6c27c 4383 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4384 switch (err) {
4385 default:
4386 printk(KERN_ERR "%s: unhandled error %d.\n",
4387 __func__, err);
4388 case 0:
965b5d67 4389 case -ESTALE:
d5122201
TM		 4390 goto out;
4391 case -NFS4ERR_EXPIRED:
4392 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4393 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4394 case -NFS4ERR_BADSESSION:
4395 case -NFS4ERR_BADSLOT:
4396 case -NFS4ERR_BAD_HIGH_SLOT:
4397 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4398 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4399 nfs4_schedule_state_recovery(server->nfs_client);
4400 goto out;
965b5d67
TM		 4401 case -ERESTARTSYS:
4402 /*
4403 * The show must go on: exit, but mark the
4404 * stateid as needing recovery.
4405 */
4406 case -NFS4ERR_ADMIN_REVOKED:
4407 case -NFS4ERR_BAD_STATEID:
4408 case -NFS4ERR_OPENMODE:
4409 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4410 err = 0;
4411 goto out;
4412 case -ENOMEM:
4413 case -NFS4ERR_DENIED:
4414 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4415 err = 0;
4416 goto out;
d5122201 4417 case -NFS4ERR_DELAY:
2c643488 4418 case -EKEYEXPIRED:
d5122201
TM		 4419 break;
4420 }
888e694c
TM		 4421 err = nfs4_handle_exception(server, err, &exception);
4422 } while (exception.retry);
4423out:
4424 return err;
4425}
6b3b5496 4426
aa1870af
BF		 4427#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4428
6b3b5496
BF		 4429int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4430 size_t buflen, int flags)
4431{
4b580ee3
BF		 4432 struct inode *inode = dentry->d_inode;
4433
4434 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4435 return -EOPNOTSUPP;
4436
4b580ee3 4437 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4438}
4439
4440/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4441 * and that's what we'll do for e.g. user attributes that haven't been set.
4442 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4443 * attributes in kernel-managed attribute namespaces. */
4444ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4445 size_t buflen)
4446{
aa1870af
BF		 4447 struct inode *inode = dentry->d_inode;
4448
4449 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4450 return -EOPNOTSUPP;
4451
4452 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4453}
4454
4455ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4456{
aa1870af 4457 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4458
096455a2
BF		 4459 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4460 return 0;
6b3b5496
BF		 4461 if (buf && buflen < len)
4462 return -ERANGE;
4463 if (buf)
aa1870af
BF		 4464 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4465 return len;
6b3b5496
BF		 4466}
4467
69aaaae1
TM		 4468static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4469{
4470 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4471 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4472 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4473 return;
4474
4475 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4476 NFS_ATTR_FATTR_NLINK;
4477 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4478 fattr->nlink = 2;
4479}
4480
56659e99 4481int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4482 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4483{
4484 struct nfs_server *server = NFS_SERVER(dir);
4485 u32 bitmask[2] = {
361e624f
MN		 4486 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4487 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4488 };
4489 struct nfs4_fs_locations_arg args = {
4490 .dir_fh = NFS_FH(dir),
c228fd3a 4491 .name = name,
683b57b4
TM		 4492 .page = page,
4493 .bitmask = bitmask,
4494 };
22958463
BH		 4495 struct nfs4_fs_locations_res res = {
4496 .fs_locations = fs_locations,
4497 };
683b57b4
TM		 4498 struct rpc_message msg = {
4499 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4500 .rpc_argp = &args,
22958463 4501 .rpc_resp = &res,
683b57b4
TM		 4502 };
4503 int status;
4504
3110ff80 4505 dprintk("%s: start\n", __func__);
c228fd3a 4506 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4507 fs_locations->server = server;
830b8e33 4508 fs_locations->nlocations = 0;
cccef3b9 4509 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4510 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4511 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4512 return status;
4513}
4514
557134a3 4515#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4516/*
4517 * nfs4_proc_exchange_id()
4518 *
4519 * Since the clientid has expired, all compounds using sessions
4520 * associated with the stale clientid will be returning
4521 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4522 * be in some phase of session reset.
4523 */
4d643d1d 4524int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4525{
4526 nfs4_verifier verifier;
4527 struct nfs41_exchange_id_args args = {
4528 .client = clp,
4529 .flags = clp->cl_exchange_flags,
4530 };
4531 struct nfs41_exchange_id_res res = {
4532 .client = clp,
4533 };
4534 int status;
4535 struct rpc_message msg = {
4536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4537 .rpc_argp = &args,
4538 .rpc_resp = &res,
4539 .rpc_cred = cred,
4540 };
4541 __be32 *p;
4542
4543 dprintk("--> %s\n", __func__);
4544 BUG_ON(clp == NULL);
a7b72103 4545
7b183d0d
AB		 4546 /* Remove server-only flags */
4547 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4548
99fe60d0
BH		 4549 p = (u32 *)verifier.data;
4550 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4551 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4552 args.verifier = &verifier;
4553
4554 while (1) {
4555 args.id_len = scnprintf(args.id, sizeof(args.id),
4556 "%s/%s %u",
4557 clp->cl_ipaddr,
4558 rpc_peeraddr2str(clp->cl_rpcclient,
4559 RPC_DISPLAY_ADDR),
4560 clp->cl_id_uniquifier);
4561
4562 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4563
180b62a3 4564 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4565 break;
4566
4567 if (signalled())
4568 break;
4569
4570 if (++clp->cl_id_uniquifier == 0)
4571 break;
4572 }
4573
4574 dprintk("<-- %s status= %d\n", __func__, status);
4575 return status;
4576}
4577
2050f0cc
AA		 4578struct nfs4_get_lease_time_data {
4579 struct nfs4_get_lease_time_args *args;
4580 struct nfs4_get_lease_time_res *res;
4581 struct nfs_client *clp;
4582};
4583
4584static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4585 void *calldata)
4586{
4587 int ret;
4588 struct nfs4_get_lease_time_data *data =
4589 (struct nfs4_get_lease_time_data *)calldata;
4590
4591 dprintk("--> %s\n", __func__);
689cf5c1 4592 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4593 /* just setup sequence, do not trigger session recovery
4594 since we're invoked within one */
4595 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4596 &data->args->la_seq_args,
4597 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4598
4599 BUG_ON(ret == -EAGAIN);
4600 rpc_call_start(task);
4601 dprintk("<-- %s\n", __func__);
4602}
4603
4604/*
4605 * Called from nfs4_state_manager thread for session setup, so don't recover
4606 * from sequence operation or clientid errors.
4607 */
4608static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4609{
4610 struct nfs4_get_lease_time_data *data =
4611 (struct nfs4_get_lease_time_data *)calldata;
4612
4613 dprintk("--> %s\n", __func__);
4614 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4615 switch (task->tk_status) {
4616 case -NFS4ERR_DELAY:
4617 case -NFS4ERR_GRACE:
2c643488 4618 case -EKEYEXPIRED:
2050f0cc
AA		 4619 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4620 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4621 task->tk_status = 0;
0110ee15 4622 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4623 return;
4624 }
2050f0cc
AA		 4625 dprintk("<-- %s\n", __func__);
4626}
4627
4628struct rpc_call_ops nfs4_get_lease_time_ops = {
4629 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4630 .rpc_call_done = nfs4_get_lease_time_done,
4631};
4632
4633int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4634{
4635 struct rpc_task *task;
4636 struct nfs4_get_lease_time_args args;
4637 struct nfs4_get_lease_time_res res = {
4638 .lr_fsinfo = fsinfo,
4639 };
4640 struct nfs4_get_lease_time_data data = {
4641 .args = &args,
4642 .res = &res,
4643 .clp = clp,
4644 };
4645 struct rpc_message msg = {
4646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4647 .rpc_argp = &args,
4648 .rpc_resp = &res,
4649 };
4650 struct rpc_task_setup task_setup = {
4651 .rpc_client = clp->cl_rpcclient,
4652 .rpc_message = &msg,
4653 .callback_ops = &nfs4_get_lease_time_ops,
4654 .callback_data = &data
4655 };
4656 int status;
4657
4658 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4659 dprintk("--> %s\n", __func__);
4660 task = rpc_run_task(&task_setup);
4661
4662 if (IS_ERR(task))
4663 status = PTR_ERR(task);
4664 else {
4665 status = task->tk_status;
4666 rpc_put_task(task);
4667 }
4668 dprintk("<-- %s return %d\n", __func__, status);
4669
4670 return status;
4671}
4672
b73dafa7
RL		 4673/*
4674 * Reset a slot table
4675 */
104aeba4
AA		 4676static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4677 int ivalue)
ac72b7b3 4678{
104aeba4 4679 struct nfs4_slot *new = NULL;
b73dafa7 4680 int i;
ac72b7b3
AA		 4681 int ret = 0;
4682
104aeba4
AA		 4683 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4684 max_reqs, tbl->max_slots);
ac72b7b3 4685
104aeba4
AA		 4686 /* Does the newly negotiated max_reqs match the existing slot table? */
4687 if (max_reqs != tbl->max_slots) {
4688 ret = -ENOMEM;
4689 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4690 GFP_NOFS);
104aeba4
AA		 4691 if (!new)
4692 goto out;
4693 ret = 0;
4694 kfree(tbl->slots);
ac72b7b3
AA		 4695 }
4696 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4697 if (new) {
4698 tbl->slots = new;
4699 tbl->max_slots = max_reqs;
4700 }
4701 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4702 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4703 spin_unlock(&tbl->slot_tbl_lock);
4704 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4705 tbl, tbl->slots, tbl->max_slots);
4706out:
4707 dprintk("<-- %s: return %d\n", __func__, ret);
4708 return ret;
4709}
4710
b73dafa7
RL		 4711/*
4712 * Reset the forechannel and backchannel slot tables
4713 */
4714static int nfs4_reset_slot_tables(struct nfs4_session *session)
4715{
4716 int status;
4717
4718 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4719 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4720 if (status)
4721 return status;
4722
4723 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4724 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4725 return status;
4726}
4727
f8625a6a
RL		 4728/* Destroy the slot table */
4729static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4730{
4731 if (session->fc_slot_table.slots != NULL) {
4732 kfree(session->fc_slot_table.slots);
4733 session->fc_slot_table.slots = NULL;
4734 }
4735 if (session->bc_slot_table.slots != NULL) {
4736 kfree(session->bc_slot_table.slots);
4737 session->bc_slot_table.slots = NULL;
4738 }
4739 return;
4740}
4741
fc931582
AA		 4742/*
4743 * Initialize slot table
4744 */
050047ce
RL		 4745static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4746 int max_slots, int ivalue)
fc931582 4747{
fc931582
AA		 4748 struct nfs4_slot *slot;
4749 int ret = -ENOMEM;
4750
4751 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4752
050047ce 4753 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4754
8535b2be 4755 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4756 if (!slot)
4757 goto out;
fc931582
AA		 4758 ret = 0;
4759
4760 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4761 tbl->max_slots = max_slots;
4762 tbl->slots = slot;
4763 tbl->highest_used_slotid = -1; /* no slot is currently used */
4764 spin_unlock(&tbl->slot_tbl_lock);
4765 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4766 tbl, tbl->slots, tbl->max_slots);
4767out:
4768 dprintk("<-- %s: return %d\n", __func__, ret);
4769 return ret;
fc931582
AA		 4770}
4771
050047ce
RL		 4772/*
4773 * Initialize the forechannel and backchannel tables
4774 */
4775static int nfs4_init_slot_tables(struct nfs4_session *session)
4776{
f26468fb
TM		 4777 struct nfs4_slot_table *tbl;
4778 int status = 0;
050047ce 4779
f26468fb
TM		 4780 tbl = &session->fc_slot_table;
4781 if (tbl->slots == NULL) {
4782 status = nfs4_init_slot_table(tbl,
4783 session->fc_attrs.max_reqs, 1);
4784 if (status)
4785 return status;
4786 }
050047ce 4787
f26468fb
TM		 4788 tbl = &session->bc_slot_table;
4789 if (tbl->slots == NULL) {
4790 status = nfs4_init_slot_table(tbl,
4791 session->bc_attrs.max_reqs, 0);
4792 if (status)
4793 nfs4_destroy_slot_tables(session);
4794 }
f8625a6a
RL		 4795
4796 return status;
557134a3
AA		 4797}
4798
4799struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4800{
4801 struct nfs4_session *session;
4802 struct nfs4_slot_table *tbl;
4803
8535b2be 4804 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4805 if (!session)
4806 return NULL;
76db6d95 4807
76db6d95
AA		 4808 /*
4809 * The create session reply races with the server back
4810 * channel probe. Mark the client NFS_CS_SESSION_INITING
4811 * so that the client back channel can find the
4812 * nfs_client struct
4813 */
4814 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4815 init_completion(&session->complete);
76db6d95 4816
557134a3 4817 tbl = &session->fc_slot_table;
9dfdf404 4818 tbl->highest_used_slotid = -1;
557134a3 4819 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4820 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4821
4822 tbl = &session->bc_slot_table;
9dfdf404 4823 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4824 spin_lock_init(&tbl->slot_tbl_lock);
4825 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4826
557134a3
AA		 4827 session->clp = clp;
4828 return session;
4829}
4830
4831void nfs4_destroy_session(struct nfs4_session *session)
4832{
5a0ffe54
AA		 4833 nfs4_proc_destroy_session(session);
4834 dprintk("%s Destroy backchannel for xprt %p\n",
4835 __func__, session->clp->cl_rpcclient->cl_xprt);
4836 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4837 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4838 nfs4_destroy_slot_tables(session);
557134a3
AA		 4839 kfree(session);
4840}
4841
fc931582
AA		 4842/*
4843 * Initialize the values to be used by the client in CREATE_SESSION
4844 * If nfs4_init_session set the fore channel request and response sizes,
4845 * use them.
4846 *
4847 * Set the back channel max_resp_sz_cached to zero to force the client to
4848 * always set csa_cachethis to FALSE because the current implementation
4849 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4850 */
4851static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4852{
4853 struct nfs4_session *session = args->client->cl_session;
4854 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4855 mxresp_sz = session->fc_attrs.max_resp_sz;
4856
4857 if (mxrqst_sz == 0)
4858 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4859 if (mxresp_sz == 0)
4860 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4861 /* Fore channel attributes */
4862 args->fc_attrs.headerpadsz = 0;
4863 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4864 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4865 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4866 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4867
4868 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4869 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4870 __func__,
4871 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4872 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4873
4874 /* Back channel attributes */
4875 args->bc_attrs.headerpadsz = 0;
4876 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4877 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4878 args->bc_attrs.max_resp_sz_cached = 0;
4879 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4880 args->bc_attrs.max_reqs = 1;
4881
4882 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4883 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4884 __func__,
4885 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4886 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4887 args->bc_attrs.max_reqs);
4888}
4889
8d35301d
AA		 4890static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4891{
4892 if (rcvd <= sent)
4893 return 0;
4894 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4895 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4896 return -EINVAL;
4897}
4898
4899#define _verify_fore_channel_attr(_name_) \
4900 _verify_channel_attr("fore", #_name_, \
4901 args->fc_attrs._name_, \
4902 session->fc_attrs._name_)
4903
4904#define _verify_back_channel_attr(_name_) \
4905 _verify_channel_attr("back", #_name_, \
4906 args->bc_attrs._name_, \
4907 session->bc_attrs._name_)
4908
4909/*
4910 * The server is not allowed to increase the fore channel header pad size,
4911 * maximum response size, or maximum number of operations.
4912 *
4913 * The back channel attributes are only negotiatied down: We send what the
4914 * (back channel) server insists upon.
4915 */
4916static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4917 struct nfs4_session *session)
4918{
4919 int ret = 0;
4920
4921 ret |= _verify_fore_channel_attr(headerpadsz);
4922 ret |= _verify_fore_channel_attr(max_resp_sz);
4923 ret |= _verify_fore_channel_attr(max_ops);
4924
4925 ret |= _verify_back_channel_attr(headerpadsz);
4926 ret |= _verify_back_channel_attr(max_rqst_sz);
4927 ret |= _verify_back_channel_attr(max_resp_sz);
4928 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4929 ret |= _verify_back_channel_attr(max_ops);
4930 ret |= _verify_back_channel_attr(max_reqs);
4931
4932 return ret;
4933}
4934
fc931582
AA		 4935static int _nfs4_proc_create_session(struct nfs_client *clp)
4936{
4937 struct nfs4_session *session = clp->cl_session;
4938 struct nfs41_create_session_args args = {
4939 .client = clp,
4940 .cb_program = NFS4_CALLBACK,
4941 };
4942 struct nfs41_create_session_res res = {
4943 .client = clp,
4944 };
4945 struct rpc_message msg = {
4946 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4947 .rpc_argp = &args,
4948 .rpc_resp = &res,
4949 };
4950 int status;
4951
4952 nfs4_init_channel_attrs(&args);
0f91421e 4953 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4954
4955 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4956
8d35301d
AA		 4957 if (!status)
4958 /* Verify the session's negotiated channel_attrs values */
4959 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4960 if (!status) {
4961 /* Increment the clientid slot sequence id */
4962 clp->cl_seqid++;
4963 }
4964
4965 return status;
4966}
4967
4968/*
4969 * Issues a CREATE_SESSION operation to the server.
4970 * It is the responsibility of the caller to verify the session is
4971 * expired before calling this routine.
4972 */
f26468fb 4973int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4974{
4975 int status;
4976 unsigned *ptr;
fc931582
AA		 4977 struct nfs4_session *session = clp->cl_session;
4978
4979 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4980
4981 status = _nfs4_proc_create_session(clp);
4982 if (status)
4983 goto out;
4984
f26468fb
TM		 4985 /* Init and reset the fore channel */
4986 status = nfs4_init_slot_tables(session);
4987 dprintk("slot table initialization returned %d\n", status);
4988 if (status)
4989 goto out;
4990 status = nfs4_reset_slot_tables(session);
4991 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4992 if (status)
4993 goto out;
4994
4995 ptr = (unsigned *)&session->sess_id.data[0];
4996 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4997 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4998out:
4999 dprintk("<-- %s\n", __func__);
5000 return status;
5001}
5002
0f3e66c6
AA		 5003/*
5004 * Issue the over-the-wire RPC DESTROY_SESSION.
5005 * The caller must serialize access to this routine.
5006 */
5007int nfs4_proc_destroy_session(struct nfs4_session *session)
5008{
5009 int status = 0;
5010 struct rpc_message msg;
5011
5012 dprintk("--> nfs4_proc_destroy_session\n");
5013
5014 /* session is still being setup */
5015 if (session->clp->cl_cons_state != NFS_CS_READY)
5016 return status;
5017
5018 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5019 msg.rpc_argp = session;
5020 msg.rpc_resp = NULL;
5021 msg.rpc_cred = NULL;
5022 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5023
5024 if (status)
5025 printk(KERN_WARNING
5026 "Got error %d from the server on DESTROY_SESSION. "
5027 "Session has been destroyed regardless...\n", status);
5028
5029 dprintk("<-- nfs4_proc_destroy_session\n");
5030 return status;
5031}
5032
fccba804
TM		 5033int nfs4_init_session(struct nfs_server *server)
5034{
5035 struct nfs_client *clp = server->nfs_client;
2449ea2e 5036 struct nfs4_session *session;
68bf05ef 5037 unsigned int rsize, wsize;
fccba804
TM		 5038 int ret;
5039
5040 if (!nfs4_has_session(clp))
5041 return 0;
5042
68bf05ef
AA		 5043 rsize = server->rsize;
5044 if (rsize == 0)
5045 rsize = NFS_MAX_FILE_IO_SIZE;
5046 wsize = server->wsize;
5047 if (wsize == 0)
5048 wsize = NFS_MAX_FILE_IO_SIZE;
5049
2449ea2e 5050 session = clp->cl_session;
68bf05ef
AA		 5051 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5052 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5053
fccba804
TM		 5054 ret = nfs4_recover_expired_lease(server);
5055 if (!ret)
5056 ret = nfs4_check_client_ready(clp);
5057 return ret;
5058}
5059
fc01cea9
AA		 5060/*
5061 * Renew the cl_session lease.
5062 */
5063static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5064{
5065 struct nfs4_sequence_args args;
5066 struct nfs4_sequence_res res;
5067
5068 struct rpc_message msg = {
5069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5070 .rpc_argp = &args,
5071 .rpc_resp = &res,
5072 .rpc_cred = cred,
5073 };
5074
5075 args.sa_cache_this = 0;
5076
5077 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
b257957e 5078 &res, args.sa_cache_this, 1);
fc01cea9
AA		 5079}
5080
dc96aef9
AB		 5081static void nfs41_sequence_release(void *data)
5082{
5083 struct nfs_client *clp = (struct nfs_client *)data;
5084
7135840f
AB		 5085 if (atomic_read(&clp->cl_count) > 1)
5086 nfs4_schedule_state_renewal(clp);
5087 nfs_put_client(clp);
dc96aef9
AB		 5088}
5089
5090static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9
AA		 5091{
5092 struct nfs_client *clp = (struct nfs_client *)data;
5093
5094 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
5095
5096 if (task->tk_status < 0) {
5097 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5098 if (atomic_read(&clp->cl_count) == 1)
5099 goto out;
fc01cea9
AA		 5100
5101 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
5102 == -EAGAIN) {
0110ee15 5103 nfs_restart_rpc(task, clp);
fc01cea9
AA		 5104 return;
5105 }
5106 }
fc01cea9 5107 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5108out:
fc01cea9
AA		 5109 kfree(task->tk_msg.rpc_argp);
5110 kfree(task->tk_msg.rpc_resp);
5111
5112 dprintk("<-- %s\n", __func__);
5113}
5114
5115static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5116{
5117 struct nfs_client *clp;
5118 struct nfs4_sequence_args *args;
5119 struct nfs4_sequence_res *res;
5120
5121 clp = (struct nfs_client *)data;
5122 args = task->tk_msg.rpc_argp;
5123 res = task->tk_msg.rpc_resp;
5124
5125 if (nfs4_setup_sequence(clp, args, res, 0, task))
5126 return;
5127 rpc_call_start(task);
5128}
5129
5130static const struct rpc_call_ops nfs41_sequence_ops = {
5131 .rpc_call_done = nfs41_sequence_call_done,
5132 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5133 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5134};
5135
5136static int nfs41_proc_async_sequence(struct nfs_client *clp,
5137 struct rpc_cred *cred)
5138{
5139 struct nfs4_sequence_args *args;
5140 struct nfs4_sequence_res *res;
5141 struct rpc_message msg = {
5142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5143 .rpc_cred = cred,
5144 };
5145
7135840f
AB		 5146 if (!atomic_inc_not_zero(&clp->cl_count))
5147 return -EIO;
8535b2be
TM		 5148 args = kzalloc(sizeof(*args), GFP_NOFS);
5149 res = kzalloc(sizeof(*res), GFP_NOFS);
7135840f 5150 if (!args || !res) {
fc01cea9 5151 kfree(args);
7dd08a57 5152 kfree(res);
7135840f 5153 nfs_put_client(clp);
fc01cea9
AA		 5154 return -ENOMEM;
5155 }
5156 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
5157 msg.rpc_argp = args;
5158 msg.rpc_resp = res;
5159
5160 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
5161 &nfs41_sequence_ops, (void *)clp);
5162}
5163
fce5c838
RL		 5164struct nfs4_reclaim_complete_data {
5165 struct nfs_client *clp;
5166 struct nfs41_reclaim_complete_args arg;
5167 struct nfs41_reclaim_complete_res res;
5168};
5169
5170static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5171{
5172 struct nfs4_reclaim_complete_data *calldata = data;
5173
b257957e 5174 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
fce5c838
RL		 5175 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
5176 &calldata->res.seq_res, 0, task))
5177 return;
5178
5179 rpc_call_start(task);
5180}
5181
5182static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5183{
5184 struct nfs4_reclaim_complete_data *calldata = data;
5185 struct nfs_client *clp = calldata->clp;
5186 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5187
5188 dprintk("--> %s\n", __func__);
5189 nfs41_sequence_done(clp, res, task->tk_status);
5190 switch (task->tk_status) {
5191 case 0:
5192 case -NFS4ERR_COMPLETE_ALREADY:
5193 break;
5194 case -NFS4ERR_BADSESSION:
5195 case -NFS4ERR_DEADSESSION:
5196 /*
5197 * Handle the session error, but do not retry the operation, as
5198 * we have no way of telling whether the clientid had to be
5199 * reset before we got our reply. If reset, a new wave of
5200 * reclaim operations will follow, containing their own reclaim
5201 * complete. We don't want our retry to get on the way of
5202 * recovery by incorrectly indicating to the server that we're
5203 * done reclaiming state since the process had to be restarted.
5204 */
5205 _nfs4_async_handle_error(task, NULL, clp, NULL);
5206 break;
5207 default:
5208 if (_nfs4_async_handle_error(
5209 task, NULL, clp, NULL) == -EAGAIN) {
5210 rpc_restart_call_prepare(task);
5211 return;
5212 }
5213 }
fce5c838
RL		 5214
5215 dprintk("<-- %s\n", __func__);
5216}
5217
5218static void nfs4_free_reclaim_complete_data(void *data)
5219{
5220 struct nfs4_reclaim_complete_data *calldata = data;
5221
5222 kfree(calldata);
5223}
5224
5225static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5226 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5227 .rpc_call_done = nfs4_reclaim_complete_done,
5228 .rpc_release = nfs4_free_reclaim_complete_data,
5229};
5230
5231/*
5232 * Issue a global reclaim complete.
5233 */
5234static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5235{
5236 struct nfs4_reclaim_complete_data *calldata;
5237 struct rpc_task *task;
5238 struct rpc_message msg = {
5239 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5240 };
5241 struct rpc_task_setup task_setup_data = {
5242 .rpc_client = clp->cl_rpcclient,
5243 .rpc_message = &msg,
5244 .callback_ops = &nfs4_reclaim_complete_call_ops,
5245 .flags = RPC_TASK_ASYNC,
5246 };
5247 int status = -ENOMEM;
5248
5249 dprintk("--> %s\n", __func__);
8535b2be 5250 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5251 if (calldata == NULL)
5252 goto out;
5253 calldata->clp = clp;
5254 calldata->arg.one_fs = 0;
5255 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5256
5257 msg.rpc_argp = &calldata->arg;
5258 msg.rpc_resp = &calldata->res;
5259 task_setup_data.callback_data = calldata;
5260 task = rpc_run_task(&task_setup_data);
acf82b85 5261 if (IS_ERR(task)) {
fce5c838 5262 status = PTR_ERR(task);
acf82b85
DC		 5263 goto out;
5264 }
fce5c838 5265 rpc_put_task(task);
acf82b85 5266 return 0;
fce5c838
RL		 5267out:
5268 dprintk("<-- %s status=%d\n", __func__, status);
5269 return status;
5270}
557134a3
AA		 5271#endif /* CONFIG_NFS_V4_1 */
5272
591d71cb 5273struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5274 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5275 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5276 .recover_open = nfs4_open_reclaim,
5277 .recover_lock = nfs4_lock_reclaim,
591d71cb 5278 .establish_clid = nfs4_init_clientid,
90a16617 5279 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5280};
5281
591d71cb
AA		 5282#if defined(CONFIG_NFS_V4_1)
5283struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5284 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5285 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5286 .recover_open = nfs4_open_reclaim,
5287 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5288 .establish_clid = nfs41_init_clientid,
b4b82607 5289 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5290 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5291};
5292#endif /* CONFIG_NFS_V4_1 */
5293
5294struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5295 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5296 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5297 .recover_open = nfs4_open_expired,
5298 .recover_lock = nfs4_lock_expired,
5299 .establish_clid = nfs4_init_clientid,
90a16617 5300 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5301};
5302
5303#if defined(CONFIG_NFS_V4_1)
5304struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5305 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5306 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5307 .recover_open = nfs4_open_expired,
5308 .recover_lock = nfs4_lock_expired,
4d643d1d 5309 .establish_clid = nfs41_init_clientid,
b4b82607 5310 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5311};
591d71cb 5312#endif /* CONFIG_NFS_V4_1 */
1da177e4 5313
29fba38b
BH		 5314struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5315 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5316 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5317 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5318};
5319
5320#if defined(CONFIG_NFS_V4_1)
5321struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5322 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5323 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5324 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5325};
5326#endif
5327
5328/*
5329 * Per minor version reboot and network partition recovery ops
5330 */
5331
591d71cb
AA		 5332struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5333 &nfs40_reboot_recovery_ops,
5334#if defined(CONFIG_NFS_V4_1)
5335 &nfs41_reboot_recovery_ops,
5336#endif
5337};
5338
5339struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5340 &nfs40_nograce_recovery_ops,
5341#if defined(CONFIG_NFS_V4_1)
5342 &nfs41_nograce_recovery_ops,
5343#endif
5344};
5345
29fba38b
BH		 5346struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5347 &nfs40_state_renewal_ops,
5348#if defined(CONFIG_NFS_V4_1)
5349 &nfs41_state_renewal_ops,
5350#endif
5351};
5352
92e1d5be 5353static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5354 .permission = nfs_permission,
5355 .getattr = nfs_getattr,
5356 .setattr = nfs_setattr,
5357 .getxattr = nfs4_getxattr,
5358 .setxattr = nfs4_setxattr,
5359 .listxattr = nfs4_listxattr,
5360};
5361
509de811 5362const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5363 .version = 4, /* protocol version */
5364 .dentry_ops = &nfs4_dentry_operations,
5365 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5366 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5367 .getroot = nfs4_proc_get_root,
5368 .getattr = nfs4_proc_getattr,
5369 .setattr = nfs4_proc_setattr,
2b3de441 5370 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5371 .lookup = nfs4_proc_lookup,
5372 .access = nfs4_proc_access,
5373 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5374 .create = nfs4_proc_create,
5375 .remove = nfs4_proc_remove,
5376 .unlink_setup = nfs4_proc_unlink_setup,
5377 .unlink_done = nfs4_proc_unlink_done,
5378 .rename = nfs4_proc_rename,
5379 .link = nfs4_proc_link,
5380 .symlink = nfs4_proc_symlink,
5381 .mkdir = nfs4_proc_mkdir,
5382 .rmdir = nfs4_proc_remove,
5383 .readdir = nfs4_proc_readdir,
5384 .mknod = nfs4_proc_mknod,
5385 .statfs = nfs4_proc_statfs,
5386 .fsinfo = nfs4_proc_fsinfo,
5387 .pathconf = nfs4_proc_pathconf,
e9326dca 5388 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5389 .decode_dirent = nfs4_decode_dirent,
5390 .read_setup = nfs4_proc_read_setup,
ec06c096 5391 .read_done = nfs4_read_done,
1da177e4 5392 .write_setup = nfs4_proc_write_setup,
788e7a89 5393 .write_done = nfs4_write_done,
1da177e4 5394 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5395 .commit_done = nfs4_commit_done,
1da177e4 5396 .lock = nfs4_proc_lock,
e50a1c2e 5397 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5398 .close_context = nfs4_close_context,
1da177e4
LT		 5399};
5400
5401/*
5402 * Local variables:
5403 * c-basic-offset: 8
5404 * End:
5405 */
Linux 6.x block layer and io_uring tree(s)