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