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NFSv4: Allow attribute caching with 'noac' mounts if client holds a delegation
[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
3166/*
3167 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3168 * standalone procedure for queueing an asynchronous RENEW.
3169 */
dc96aef9
AB		 3170static void nfs4_renew_release(void *data)
3171{
3172 struct nfs_client *clp = data;
3173
0851de06
AB		 3174 if (atomic_read(&clp->cl_count) > 1)
3175 nfs4_schedule_state_renewal(clp);
3176 nfs_put_client(clp);
dc96aef9
AB		 3177}
3178
963d8fe5 3179static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3180{
dc96aef9
AB		 3181 struct nfs_client *clp = data;
3182 unsigned long timestamp = task->tk_start;
1da177e4
LT		 3183
3184 if (task->tk_status < 0) {
95baa25c
TM		 3185 /* Unless we're shutting down, schedule state recovery! */
3186 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3187 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3188 return;
3189 }
3190 spin_lock(&clp->cl_lock);
3191 if (time_before(clp->cl_last_renewal,timestamp))
3192 clp->cl_last_renewal = timestamp;
3193 spin_unlock(&clp->cl_lock);
3194}
3195
963d8fe5
TM		 3196static const struct rpc_call_ops nfs4_renew_ops = {
3197 .rpc_call_done = nfs4_renew_done,
dc96aef9 3198 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3199};
3200
adfa6f98 3201int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3202{
3203 struct rpc_message msg = {
3204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3205 .rpc_argp = clp,
b4454fe1 3206 .rpc_cred = cred,
1da177e4
LT		 3207 };
3208
0851de06
AB		 3209 if (!atomic_inc_not_zero(&clp->cl_count))
3210 return -EIO;
1da177e4 3211 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
dc96aef9 3212 &nfs4_renew_ops, clp);
1da177e4
LT		 3213}
3214
adfa6f98 3215int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3216{
3217 struct rpc_message msg = {
3218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3219 .rpc_argp = clp,
b4454fe1 3220 .rpc_cred = cred,
1da177e4
LT		 3221 };
3222 unsigned long now = jiffies;
3223 int status;
3224
3225 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3226 if (status < 0)
3227 return status;
3228 spin_lock(&clp->cl_lock);
3229 if (time_before(clp->cl_last_renewal,now))
3230 clp->cl_last_renewal = now;
3231 spin_unlock(&clp->cl_lock);
3232 return 0;
3233}
3234
aa1870af
BF		 3235static inline int nfs4_server_supports_acls(struct nfs_server *server)
3236{
3237 return (server->caps & NFS_CAP_ACLS)
3238 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3239 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3240}
3241
3242/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3243 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3244 * the stack.
3245 */
3246#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3247
3248static void buf_to_pages(const void *buf, size_t buflen,
3249 struct page **pages, unsigned int *pgbase)
3250{
3251 const void *p = buf;
3252
3253 *pgbase = offset_in_page(buf);
3254 p -= *pgbase;
3255 while (p < buf + buflen) {
3256 *(pages++) = virt_to_page(p);
3257 p += PAGE_CACHE_SIZE;
3258 }
3259}
3260
e50a1c2e
BF		 3261struct nfs4_cached_acl {
3262 int cached;
3263 size_t len;
3e9d4154 3264 char data[0];
e50a1c2e
BF		 3265};
3266
3267static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3268{
3269 struct nfs_inode *nfsi = NFS_I(inode);
3270
3271 spin_lock(&inode->i_lock);
3272 kfree(nfsi->nfs4_acl);
3273 nfsi->nfs4_acl = acl;
3274 spin_unlock(&inode->i_lock);
3275}
3276
3277static void nfs4_zap_acl_attr(struct inode *inode)
3278{
3279 nfs4_set_cached_acl(inode, NULL);
3280}
3281
3282static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3283{
3284 struct nfs_inode *nfsi = NFS_I(inode);
3285 struct nfs4_cached_acl *acl;
3286 int ret = -ENOENT;
3287
3288 spin_lock(&inode->i_lock);
3289 acl = nfsi->nfs4_acl;
3290 if (acl == NULL)
3291 goto out;
3292 if (buf == NULL) /* user is just asking for length */
3293 goto out_len;
3294 if (acl->cached == 0)
3295 goto out;
3296 ret = -ERANGE; /* see getxattr(2) man page */
3297 if (acl->len > buflen)
3298 goto out;
3299 memcpy(buf, acl->data, acl->len);
3300out_len:
3301 ret = acl->len;
3302out:
3303 spin_unlock(&inode->i_lock);
3304 return ret;
3305}
3306
3307static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3308{
3309 struct nfs4_cached_acl *acl;
3310
3311 if (buf && acl_len <= PAGE_SIZE) {
3312 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3313 if (acl == NULL)
3314 goto out;
3315 acl->cached = 1;
3316 memcpy(acl->data, buf, acl_len);
3317 } else {
3318 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3319 if (acl == NULL)
3320 goto out;
3321 acl->cached = 0;
3322 }
3323 acl->len = acl_len;
3324out:
3325 nfs4_set_cached_acl(inode, acl);
3326}
3327
16b4289c 3328static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3329{
aa1870af
BF		 3330 struct page *pages[NFS4ACL_MAXPAGES];
3331 struct nfs_getaclargs args = {
3332 .fh = NFS_FH(inode),
3333 .acl_pages = pages,
3334 .acl_len = buflen,
3335 };
663c79b3
BH		 3336 struct nfs_getaclres res = {
3337 .acl_len = buflen,
3338 };
e50a1c2e 3339 void *resp_buf;
aa1870af
BF		 3340 struct rpc_message msg = {
3341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3342 .rpc_argp = &args,
663c79b3 3343 .rpc_resp = &res,
aa1870af 3344 };
e50a1c2e 3345 struct page *localpage = NULL;
aa1870af
BF		 3346 int ret;
3347
e50a1c2e
BF		 3348 if (buflen < PAGE_SIZE) {
3349 /* As long as we're doing a round trip to the server anyway,
3350 * let's be prepared for a page of acl data. */
3351 localpage = alloc_page(GFP_KERNEL);
3352 resp_buf = page_address(localpage);
3353 if (localpage == NULL)
3354 return -ENOMEM;
3355 args.acl_pages[0] = localpage;
3356 args.acl_pgbase = 0;
663c79b3 3357 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3358 } else {
3359 resp_buf = buf;
3360 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3361 }
cccef3b9 3362 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3363 if (ret)
3364 goto out_free;
663c79b3
BH		 3365 if (res.acl_len > args.acl_len)
3366 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3367 else
663c79b3 3368 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3369 if (buf) {
3370 ret = -ERANGE;
663c79b3 3371 if (res.acl_len > buflen)
e50a1c2e
BF		 3372 goto out_free;
3373 if (localpage)
663c79b3 3374 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3375 }
663c79b3 3376 ret = res.acl_len;
e50a1c2e
BF		 3377out_free:
3378 if (localpage)
3379 __free_page(localpage);
aa1870af
BF		 3380 return ret;
3381}
3382
16b4289c
TM		 3383static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3384{
3385 struct nfs4_exception exception = { };
3386 ssize_t ret;
3387 do {
3388 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3389 if (ret >= 0)
3390 break;
3391 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3392 } while (exception.retry);
3393 return ret;
3394}
3395
e50a1c2e
BF		 3396static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3397{
3398 struct nfs_server *server = NFS_SERVER(inode);
3399 int ret;
3400
3401 if (!nfs4_server_supports_acls(server))
3402 return -EOPNOTSUPP;
3403 ret = nfs_revalidate_inode(server, inode);
3404 if (ret < 0)
3405 return ret;
3406 ret = nfs4_read_cached_acl(inode, buf, buflen);
3407 if (ret != -ENOENT)
3408 return ret;
3409 return nfs4_get_acl_uncached(inode, buf, buflen);
3410}
3411
16b4289c 3412static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3413{
3414 struct nfs_server *server = NFS_SERVER(inode);
3415 struct page *pages[NFS4ACL_MAXPAGES];
3416 struct nfs_setaclargs arg = {
3417 .fh = NFS_FH(inode),
3418 .acl_pages = pages,
3419 .acl_len = buflen,
3420 };
73c403a9 3421 struct nfs_setaclres res;
4b580ee3
BF		 3422 struct rpc_message msg = {
3423 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3424 .rpc_argp = &arg,
73c403a9 3425 .rpc_resp = &res,
4b580ee3
BF		 3426 };
3427 int ret;
3428
3429 if (!nfs4_server_supports_acls(server))
3430 return -EOPNOTSUPP;
642ac549 3431 nfs_inode_return_delegation(inode);
4b580ee3 3432 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3433 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3434 nfs_access_zap_cache(inode);
3435 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3436 return ret;
3437}
3438
16b4289c
TM		 3439static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3440{
3441 struct nfs4_exception exception = { };
3442 int err;
3443 do {
3444 err = nfs4_handle_exception(NFS_SERVER(inode),
3445 __nfs4_proc_set_acl(inode, buf, buflen),
3446 &exception);
3447 } while (exception.retry);
3448 return err;
3449}
3450
1da177e4 3451static int
8328d59f 3452_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3453{
1da177e4
LT		 3454 if (!clp || task->tk_status >= 0)
3455 return 0;
3456 switch(task->tk_status) {
9e33bed5
TM		 3457 case -NFS4ERR_ADMIN_REVOKED:
3458 case -NFS4ERR_BAD_STATEID:
3459 case -NFS4ERR_OPENMODE:
3460 if (state == NULL)
3461 break;
3462 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3463 goto do_state_recovery;
1da177e4 3464 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3465 if (state == NULL)
3466 break;
3467 nfs4_state_mark_reclaim_reboot(clp, state);
3468 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3469 case -NFS4ERR_EXPIRED:
a2c0b9e2 3470 goto do_state_recovery;
4745e315
AA		 3471#if defined(CONFIG_NFS_V4_1)
3472 case -NFS4ERR_BADSESSION:
3473 case -NFS4ERR_BADSLOT:
3474 case -NFS4ERR_BAD_HIGH_SLOT:
3475 case -NFS4ERR_DEADSESSION:
3476 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3477 case -NFS4ERR_SEQ_FALSE_RETRY:
3478 case -NFS4ERR_SEQ_MISORDERED:
3479 dprintk("%s ERROR %d, Reset session\n", __func__,
3480 task->tk_status);
0b9e2d41 3481 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3482 task->tk_status = 0;
3483 return -EAGAIN;
3484#endif /* CONFIG_NFS_V4_1 */
1da177e4 3485 case -NFS4ERR_DELAY:
8328d59f
AA		 3486 if (server)
3487 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3488 case -NFS4ERR_GRACE:
2c643488 3489 case -EKEYEXPIRED:
1da177e4
LT		 3490 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3491 task->tk_status = 0;
3492 return -EAGAIN;
3493 case -NFS4ERR_OLD_STATEID:
3494 task->tk_status = 0;
3495 return -EAGAIN;
3496 }
3497 task->tk_status = nfs4_map_errors(task->tk_status);
3498 return 0;
a2c0b9e2
TM		 3499do_state_recovery:
3500 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3501 nfs4_schedule_state_recovery(clp);
3502 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3503 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3504 task->tk_status = 0;
3505 return -EAGAIN;
1da177e4
LT		 3506}
3507
8328d59f
AA		 3508static int
3509nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3510{
3511 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3512}
3513
adfa6f98 3514int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3515{
3516 nfs4_verifier sc_verifier;
3517 struct nfs4_setclientid setclientid = {
3518 .sc_verifier = &sc_verifier,
3519 .sc_prog = program,
3520 };
3521 struct rpc_message msg = {
3522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3523 .rpc_argp = &setclientid,
3524 .rpc_resp = clp,
286d7d6a 3525 .rpc_cred = cred,
1da177e4 3526 };
bc4785cd 3527 __be32 *p;
1da177e4
LT		 3528 int loop = 0;
3529 int status;
3530
bc4785cd 3531 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3532 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3533 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3534
3535 for(;;) {
3536 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3537 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3538 clp->cl_ipaddr,
3539 rpc_peeraddr2str(clp->cl_rpcclient,
3540 RPC_DISPLAY_ADDR),
69dd716c
TM		 3541 rpc_peeraddr2str(clp->cl_rpcclient,
3542 RPC_DISPLAY_PROTO),
78ea323b 3543 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3544 clp->cl_id_uniquifier);
3545 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3546 sizeof(setclientid.sc_netid),
3547 rpc_peeraddr2str(clp->cl_rpcclient,
3548 RPC_DISPLAY_NETID));
1da177e4 3549 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3550 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3551 clp->cl_ipaddr, port >> 8, port & 255);
3552
3553 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3554 if (status != -NFS4ERR_CLID_INUSE)
3555 break;
3556 if (signalled())
3557 break;
3558 if (loop++ & 1)
3559 ssleep(clp->cl_lease_time + 1);
3560 else
3561 if (++clp->cl_id_uniquifier == 0)
3562 break;
3563 }
3564 return status;
3565}
3566
adfa6f98 3567static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3568{
3569 struct nfs_fsinfo fsinfo;
3570 struct rpc_message msg = {
3571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3572 .rpc_argp = clp,
3573 .rpc_resp = &fsinfo,
286d7d6a 3574 .rpc_cred = cred,
1da177e4
LT		 3575 };
3576 unsigned long now;
3577 int status;
3578
3579 now = jiffies;
3580 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3581 if (status == 0) {
3582 spin_lock(&clp->cl_lock);
3583 clp->cl_lease_time = fsinfo.lease_time * HZ;
3584 clp->cl_last_renewal = now;
3585 spin_unlock(&clp->cl_lock);
3586 }
3587 return status;
3588}
3589
adfa6f98 3590int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3591{
77e03677 3592 long timeout = 0;
51581f3b
TM		 3593 int err;
3594 do {
3595 err = _nfs4_proc_setclientid_confirm(clp, cred);
3596 switch (err) {
3597 case 0:
3598 return err;
3599 case -NFS4ERR_RESOURCE:
3600 /* The IBM lawyers misread another document! */
3601 case -NFS4ERR_DELAY:
2c643488 3602 case -EKEYEXPIRED:
51581f3b
TM		 3603 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3604 }
3605 } while (err == 0);
3606 return err;
3607}
3608
fe650407
TM		 3609struct nfs4_delegreturndata {
3610 struct nfs4_delegreturnargs args;
fa178f29 3611 struct nfs4_delegreturnres res;
fe650407
TM		 3612 struct nfs_fh fh;
3613 nfs4_stateid stateid;
26e976a8 3614 unsigned long timestamp;
fa178f29 3615 struct nfs_fattr fattr;
fe650407
TM		 3616 int rpc_status;
3617};
3618
fe650407
TM		 3619static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3620{
3621 struct nfs4_delegreturndata *data = calldata;
938e1010 3622
d61e612a
TM		 3623 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3624 task->tk_status);
938e1010 3625
79708861
RL		 3626 switch (task->tk_status) {
3627 case -NFS4ERR_STALE_STATEID:
3628 case -NFS4ERR_EXPIRED:
3629 case 0:
fa178f29 3630 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3631 break;
3632 default:
3633 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3634 -EAGAIN) {
3635 nfs_restart_rpc(task, data->res.server->nfs_client);
3636 return;
3637 }
3638 }
3639 data->rpc_status = task->tk_status;
fe650407
TM		 3640}
3641
3642static void nfs4_delegreturn_release(void *calldata)
3643{
fe650407
TM		 3644 kfree(calldata);
3645}
3646
938e1010
AA		 3647#if defined(CONFIG_NFS_V4_1)
3648static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3649{
3650 struct nfs4_delegreturndata *d_data;
3651
3652 d_data = (struct nfs4_delegreturndata *)data;
3653
3654 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3655 &d_data->args.seq_args,
3656 &d_data->res.seq_res, 1, task))
3657 return;
3658 rpc_call_start(task);
3659}
3660#endif /* CONFIG_NFS_V4_1 */
3661
c8d149f3 3662static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3663#if defined(CONFIG_NFS_V4_1)
3664 .rpc_call_prepare = nfs4_delegreturn_prepare,
3665#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3666 .rpc_call_done = nfs4_delegreturn_done,
3667 .rpc_release = nfs4_delegreturn_release,
3668};
3669
e6f81075 3670static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3671{
3672 struct nfs4_delegreturndata *data;
fa178f29 3673 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3674 struct rpc_task *task;
5138fde0
TM		 3675 struct rpc_message msg = {
3676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3677 .rpc_cred = cred,
3678 };
c970aa85
TM		 3679 struct rpc_task_setup task_setup_data = {
3680 .rpc_client = server->client,
5138fde0 3681 .rpc_message = &msg,
c970aa85
TM		 3682 .callback_ops = &nfs4_delegreturn_ops,
3683 .flags = RPC_TASK_ASYNC,
3684 };
e6f81075 3685 int status = 0;
fe650407 3686
938e1010 3687 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3688 if (data == NULL)
3689 return -ENOMEM;
3690 data->args.fhandle = &data->fh;
3691 data->args.stateid = &data->stateid;
fa178f29 3692 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3693 nfs_copy_fh(&data->fh, NFS_FH(inode));
3694 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3695 data->res.fattr = &data->fattr;
3696 data->res.server = server;
5f7dbd5c 3697 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3698 nfs_fattr_init(data->res.fattr);
26e976a8 3699 data->timestamp = jiffies;
fe650407
TM		 3700 data->rpc_status = 0;
3701
c970aa85 3702 task_setup_data.callback_data = data;
5138fde0
TM		 3703 msg.rpc_argp = &data->args,
3704 msg.rpc_resp = &data->res,
c970aa85 3705 task = rpc_run_task(&task_setup_data);
7a1218a2 3706 if (IS_ERR(task))
fe650407 3707 return PTR_ERR(task);
e6f81075
TM		 3708 if (!issync)
3709 goto out;
fe650407 3710 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3711 if (status != 0)
3712 goto out;
3713 status = data->rpc_status;
3714 if (status != 0)
3715 goto out;
3716 nfs_refresh_inode(inode, &data->fattr);
3717out:
e6b3c4db 3718 rpc_put_task(task);
fe650407 3719 return status;
1da177e4
LT		 3720}
3721
e6f81075 3722int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3723{
3724 struct nfs_server *server = NFS_SERVER(inode);
3725 struct nfs4_exception exception = { };
3726 int err;
3727 do {
e6f81075 3728 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3729 switch (err) {
3730 case -NFS4ERR_STALE_STATEID:
3731 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3732 case 0:
3733 return 0;
3734 }
3735 err = nfs4_handle_exception(server, err, &exception);
3736 } while (exception.retry);
3737 return err;
3738}
3739
3740#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3741#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3742
3743/*
3744 * sleep, with exponential backoff, and retry the LOCK operation.
3745 */
3746static unsigned long
3747nfs4_set_lock_task_retry(unsigned long timeout)
3748{
150030b7 3749 schedule_timeout_killable(timeout);
1da177e4
LT		 3750 timeout <<= 1;
3751 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3752 return NFS4_LOCK_MAXTIMEOUT;
3753 return timeout;
3754}
3755
1da177e4
LT		 3756static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3757{
3758 struct inode *inode = state->inode;
3759 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3760 struct nfs_client *clp = server->nfs_client;
911d1aaf 3761 struct nfs_lockt_args arg = {
1da177e4 3762 .fh = NFS_FH(inode),
911d1aaf 3763 .fl = request,
1da177e4 3764 };
911d1aaf
TM		 3765 struct nfs_lockt_res res = {
3766 .denied = request,
1da177e4
LT		 3767 };
3768 struct rpc_message msg = {
3769 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3770 .rpc_argp = &arg,
3771 .rpc_resp = &res,
3772 .rpc_cred = state->owner->so_cred,
3773 };
1da177e4
LT		 3774 struct nfs4_lock_state *lsp;
3775 int status;
3776
911d1aaf 3777 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3778 status = nfs4_set_lock_state(state, request);
3779 if (status != 0)
3780 goto out;
3781 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3782 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3783 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3784 switch (status) {
3785 case 0:
3786 request->fl_type = F_UNLCK;
3787 break;
3788 case -NFS4ERR_DENIED:
3789 status = 0;
1da177e4 3790 }
70cc6487 3791 request->fl_ops->fl_release_private(request);
8d0a8a9d 3792out:
1da177e4
LT		 3793 return status;
3794}
3795
3796static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3797{
3798 struct nfs4_exception exception = { };
3799 int err;
3800
3801 do {
3802 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3803 _nfs4_proc_getlk(state, cmd, request),
3804 &exception);
3805 } while (exception.retry);
3806 return err;
3807}
3808
3809static int do_vfs_lock(struct file *file, struct file_lock *fl)
3810{
3811 int res = 0;
3812 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3813 case FL_POSIX:
3814 res = posix_lock_file_wait(file, fl);
3815 break;
3816 case FL_FLOCK:
3817 res = flock_lock_file_wait(file, fl);
3818 break;
3819 default:
3820 BUG();
3821 }
1da177e4
LT		 3822 return res;
3823}
3824
faf5f49c 3825struct nfs4_unlockdata {
911d1aaf
TM		 3826 struct nfs_locku_args arg;
3827 struct nfs_locku_res res;
faf5f49c
TM		 3828 struct nfs4_lock_state *lsp;
3829 struct nfs_open_context *ctx;
911d1aaf
TM		 3830 struct file_lock fl;
3831 const struct nfs_server *server;
26e976a8 3832 unsigned long timestamp;
faf5f49c
TM		 3833};
3834
911d1aaf
TM		 3835static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3836 struct nfs_open_context *ctx,
3837 struct nfs4_lock_state *lsp,
3838 struct nfs_seqid *seqid)
3839{
3840 struct nfs4_unlockdata *p;
3841 struct inode *inode = lsp->ls_state->inode;
3842
a893693c 3843 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3844 if (p == NULL)
3845 return NULL;
3846 p->arg.fh = NFS_FH(inode);
3847 p->arg.fl = &p->fl;
3848 p->arg.seqid = seqid;
c1d51931 3849 p->res.seqid = seqid;
5f7dbd5c 3850 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3851 p->arg.stateid = &lsp->ls_stateid;
3852 p->lsp = lsp;
3853 atomic_inc(&lsp->ls_count);
3854 /* Ensure we don't close file until we're done freeing locks! */
3855 p->ctx = get_nfs_open_context(ctx);
3856 memcpy(&p->fl, fl, sizeof(p->fl));
3857 p->server = NFS_SERVER(inode);
3858 return p;
3859}
3860
06f814a3 3861static void nfs4_locku_release_calldata(void *data)
faf5f49c 3862{
963d8fe5 3863 struct nfs4_unlockdata *calldata = data;
911d1aaf 3864 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3865 nfs4_put_lock_state(calldata->lsp);
3866 put_nfs_open_context(calldata->ctx);
3867 kfree(calldata);
faf5f49c
TM		 3868}
3869
963d8fe5 3870static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3871{
963d8fe5 3872 struct nfs4_unlockdata *calldata = data;
faf5f49c 3873
a893693c
AA		 3874 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3875 task->tk_status);
06f814a3
TM		 3876 if (RPC_ASSASSINATED(task))
3877 return;
faf5f49c
TM		 3878 switch (task->tk_status) {
3879 case 0:
3880 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3881 calldata->res.stateid.data,
faf5f49c 3882 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3883 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3884 break;
9e33bed5
TM		 3885 case -NFS4ERR_BAD_STATEID:
3886 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3887 case -NFS4ERR_STALE_STATEID:
3888 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3889 break;
3890 default:
9e33bed5 3891 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3892 nfs_restart_rpc(task,
d61e612a 3893 calldata->server->nfs_client);
faf5f49c 3894 }
faf5f49c
TM		 3895}
3896
4ce70ada 3897static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3898{
4ce70ada 3899 struct nfs4_unlockdata *calldata = data;
faf5f49c 3900
911d1aaf 3901 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3902 return;
3903 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3904 /* Note: exit _without_ running nfs4_locku_done */
3905 task->tk_action = NULL;
faf5f49c
TM		 3906 return;
3907 }
26e976a8 3908 calldata->timestamp = jiffies;
a893693c
AA		 3909 if (nfs4_setup_sequence(calldata->server->nfs_client,
3910 &calldata->arg.seq_args,
3911 &calldata->res.seq_res, 1, task))
3912 return;
5138fde0 3913 rpc_call_start(task);
faf5f49c
TM		 3914}
3915
963d8fe5 3916static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3917 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3918 .rpc_call_done = nfs4_locku_done,
06f814a3 3919 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3920};
3921
a5d16a4d
TM		 3922static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3923 struct nfs_open_context *ctx,
3924 struct nfs4_lock_state *lsp,
3925 struct nfs_seqid *seqid)
3926{
3927 struct nfs4_unlockdata *data;
5138fde0
TM		 3928 struct rpc_message msg = {
3929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3930 .rpc_cred = ctx->cred,
3931 };
c970aa85
TM		 3932 struct rpc_task_setup task_setup_data = {
3933 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3934 .rpc_message = &msg,
c970aa85 3935 .callback_ops = &nfs4_locku_ops,
101070ca 3936 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3937 .flags = RPC_TASK_ASYNC,
3938 };
a5d16a4d 3939
137d6aca
FF		 3940 /* Ensure this is an unlock - when canceling a lock, the
3941 * canceled lock is passed in, and it won't be an unlock.
3942 */
3943 fl->fl_type = F_UNLCK;
3944
a5d16a4d
TM		 3945 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3946 if (data == NULL) {
3947 nfs_free_seqid(seqid);
3948 return ERR_PTR(-ENOMEM);
3949 }
3950
5138fde0
TM		 3951 msg.rpc_argp = &data->arg,
3952 msg.rpc_resp = &data->res,
c970aa85
TM		 3953 task_setup_data.callback_data = data;
3954 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3955}
3956
faf5f49c
TM		 3957static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3958{
19e03c57 3959 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3960 struct nfs_seqid *seqid;
1da177e4 3961 struct nfs4_lock_state *lsp;
06f814a3
TM		 3962 struct rpc_task *task;
3963 int status = 0;
536ff0f8 3964 unsigned char fl_flags = request->fl_flags;
faf5f49c 3965
8d0a8a9d 3966 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3967 /* Unlock _before_ we do the RPC call */
3968 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3969 down_read(&nfsi->rwsem);
3970 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3971 up_read(&nfsi->rwsem);
9b073574 3972 goto out;
19e03c57
TM		 3973 }
3974 up_read(&nfsi->rwsem);
8d0a8a9d 3975 if (status != 0)
9b073574
TM		 3976 goto out;
3977 /* Is this a delegated lock? */
3978 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3979 goto out;
8d0a8a9d 3980 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3981 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3982 status = -ENOMEM;
911d1aaf 3983 if (seqid == NULL)
9b073574 3984 goto out;
cd3758e3 3985 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3986 status = PTR_ERR(task);
3987 if (IS_ERR(task))
9b073574 3988 goto out;
a5d16a4d 3989 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3990 rpc_put_task(task);
9b073574 3991out:
536ff0f8 3992 request->fl_flags = fl_flags;
1da177e4
LT		 3993 return status;
3994}
3995
a5d16a4d
TM		 3996struct nfs4_lockdata {
3997 struct nfs_lock_args arg;
3998 struct nfs_lock_res res;
3999 struct nfs4_lock_state *lsp;
4000 struct nfs_open_context *ctx;
4001 struct file_lock fl;
26e976a8 4002 unsigned long timestamp;
a5d16a4d
TM		 4003 int rpc_status;
4004 int cancelled;
66179efe 4005 struct nfs_server *server;
a5d16a4d
TM		 4006};
4007
4008static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4009 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 4010{
a5d16a4d
TM		 4011 struct nfs4_lockdata *p;
4012 struct inode *inode = lsp->ls_state->inode;
1da177e4 4013 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 4014
4015 p = kzalloc(sizeof(*p), GFP_KERNEL);
4016 if (p == NULL)
4017 return NULL;
4018
4019 p->arg.fh = NFS_FH(inode);
4020 p->arg.fl = &p->fl;
2f74c0a0
TM		 4021 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
4022 if (p->arg.open_seqid == NULL)
4023 goto out_free;
a5d16a4d
TM		 4024 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
4025 if (p->arg.lock_seqid == NULL)
2f74c0a0 4026 goto out_free_seqid;
a5d16a4d 4027 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4028 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4029 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 4030 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 4031 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 4032 p->lsp = lsp;
66179efe 4033 p->server = server;
a5d16a4d
TM		 4034 atomic_inc(&lsp->ls_count);
4035 p->ctx = get_nfs_open_context(ctx);
4036 memcpy(&p->fl, fl, sizeof(p->fl));
4037 return p;
2f74c0a0
TM		 4038out_free_seqid:
4039 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4040out_free:
4041 kfree(p);
4042 return NULL;
4043}
4044
4045static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4046{
4047 struct nfs4_lockdata *data = calldata;
4048 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4049
3110ff80 4050 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4051 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4052 return;
a5d16a4d
TM		 4053 /* Do we need to do an open_to_lock_owner? */
4054 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4055 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4056 return;
a5d16a4d
TM		 4057 data->arg.open_stateid = &state->stateid;
4058 data->arg.new_lock_owner = 1;
c1d51931 4059 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4060 } else
4061 data->arg.new_lock_owner = 0;
26e976a8 4062 data->timestamp = jiffies;
66179efe
AA		 4063 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
4064 &data->res.seq_res, 1, task))
4065 return;
5138fde0 4066 rpc_call_start(task);
3110ff80 4067 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4068}
4069
b257957e
AB		 4070static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4071{
4072 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4073 nfs4_lock_prepare(task, calldata);
4074}
4075
a5d16a4d
TM		 4076static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4077{
4078 struct nfs4_lockdata *data = calldata;
4079
3110ff80 4080 dprintk("%s: begin!\n", __func__);
a5d16a4d 4081
d61e612a
TM		 4082 nfs4_sequence_done(data->server, &data->res.seq_res,
4083 task->tk_status);
66179efe 4084
a5d16a4d
TM		 4085 data->rpc_status = task->tk_status;
4086 if (RPC_ASSASSINATED(task))
4087 goto out;
4088 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4089 if (data->rpc_status == 0)
4090 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4091 else
4092 goto out;
4093 }
4094 if (data->rpc_status == 0) {
4095 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4096 sizeof(data->lsp->ls_stateid.data));
4097 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4098 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4099 }
a5d16a4d 4100out:
3110ff80 4101 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4102}
4103
4104static void nfs4_lock_release(void *calldata)
4105{
4106 struct nfs4_lockdata *data = calldata;
4107
3110ff80 4108 dprintk("%s: begin!\n", __func__);
2f74c0a0 4109 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4110 if (data->cancelled != 0) {
4111 struct rpc_task *task;
4112 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4113 data->arg.lock_seqid);
4114 if (!IS_ERR(task))
e6b3c4db 4115 rpc_put_task(task);
3110ff80 4116 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4117 } else
4118 nfs_free_seqid(data->arg.lock_seqid);
4119 nfs4_put_lock_state(data->lsp);
4120 put_nfs_open_context(data->ctx);
4121 kfree(data);
3110ff80 4122 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4123}
4124
4125static const struct rpc_call_ops nfs4_lock_ops = {
4126 .rpc_call_prepare = nfs4_lock_prepare,
4127 .rpc_call_done = nfs4_lock_done,
4128 .rpc_release = nfs4_lock_release,
4129};
4130
b257957e
AB		 4131static const struct rpc_call_ops nfs4_recover_lock_ops = {
4132 .rpc_call_prepare = nfs4_recover_lock_prepare,
4133 .rpc_call_done = nfs4_lock_done,
4134 .rpc_release = nfs4_lock_release,
4135};
4136
2bee72a6
TM		 4137static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4138{
4139 struct nfs_client *clp = server->nfs_client;
4140 struct nfs4_state *state = lsp->ls_state;
4141
4142 switch (error) {
4143 case -NFS4ERR_ADMIN_REVOKED:
4144 case -NFS4ERR_BAD_STATEID:
4145 case -NFS4ERR_EXPIRED:
4146 if (new_lock_owner != 0 ||
4147 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4148 nfs4_state_mark_reclaim_nograce(clp, state);
4149 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4150 break;
4151 case -NFS4ERR_STALE_STATEID:
4152 if (new_lock_owner != 0 ||
4153 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4154 nfs4_state_mark_reclaim_reboot(clp, state);
4155 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4156 };
4157}
4158
afe6c27c 4159static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4160{
4161 struct nfs4_lockdata *data;
4162 struct rpc_task *task;
5138fde0
TM		 4163 struct rpc_message msg = {
4164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4165 .rpc_cred = state->owner->so_cred,
4166 };
c970aa85
TM		 4167 struct rpc_task_setup task_setup_data = {
4168 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4169 .rpc_message = &msg,
c970aa85 4170 .callback_ops = &nfs4_lock_ops,
101070ca 4171 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4172 .flags = RPC_TASK_ASYNC,
4173 };
a5d16a4d
TM		 4174 int ret;
4175
3110ff80 4176 dprintk("%s: begin!\n", __func__);
cd3758e3 4177 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 4178 fl->fl_u.nfs4_fl.owner);
4179 if (data == NULL)
4180 return -ENOMEM;
4181 if (IS_SETLKW(cmd))
4182 data->arg.block = 1;
b257957e
AB		 4183 if (recovery_type > NFS_LOCK_NEW) {
4184 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4185 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4186 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4187 }
5138fde0
TM		 4188 msg.rpc_argp = &data->arg,
4189 msg.rpc_resp = &data->res,
c970aa85
TM		 4190 task_setup_data.callback_data = data;
4191 task = rpc_run_task(&task_setup_data);
7a1218a2 4192 if (IS_ERR(task))
a5d16a4d 4193 return PTR_ERR(task);
a5d16a4d
TM		 4194 ret = nfs4_wait_for_completion_rpc_task(task);
4195 if (ret == 0) {
4196 ret = data->rpc_status;
2bee72a6
TM		 4197 if (ret)
4198 nfs4_handle_setlk_error(data->server, data->lsp,
4199 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4200 } else
4201 data->cancelled = 1;
e6b3c4db 4202 rpc_put_task(task);
3110ff80 4203 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4204 return ret;
1da177e4
LT		 4205}
4206
4207static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4208{
202b50dc
TM		 4209 struct nfs_server *server = NFS_SERVER(state->inode);
4210 struct nfs4_exception exception = { };
4211 int err;
4212
4213 do {
42a2d13e
TM		 4214 /* Cache the lock if possible... */
4215 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4216 return 0;
afe6c27c 4217 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4218 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4219 break;
4220 nfs4_handle_exception(server, err, &exception);
4221 } while (exception.retry);
4222 return err;
1da177e4
LT		 4223}
4224
4225static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4226{
202b50dc
TM		 4227 struct nfs_server *server = NFS_SERVER(state->inode);
4228 struct nfs4_exception exception = { };
4229 int err;
4230
6bfc93ef
TM		 4231 err = nfs4_set_lock_state(state, request);
4232 if (err != 0)
4233 return err;
202b50dc 4234 do {
42a2d13e
TM		 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_EXPIRED);
a9ed2e25
TM		 4238 switch (err) {
4239 default:
4240 goto out;
4241 case -NFS4ERR_GRACE:
4242 case -NFS4ERR_DELAY:
2c643488 4243 case -EKEYEXPIRED:
a9ed2e25
TM		 4244 nfs4_handle_exception(server, err, &exception);
4245 err = 0;
4246 }
202b50dc 4247 } while (exception.retry);
a9ed2e25 4248out:
202b50dc 4249 return err;
1da177e4
LT		 4250}
4251
4252static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4253{
19e03c57 4254 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4255 unsigned char fl_flags = request->fl_flags;
8e469ebd 4256 int status = -ENOLCK;
1da177e4 4257
8e469ebd
TM		 4258 if ((fl_flags & FL_POSIX) &&
4259 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4260 goto out;
6bfc93ef 4261 /* Is this a delegated open? */
6bfc93ef
TM		 4262 status = nfs4_set_lock_state(state, request);
4263 if (status != 0)
4264 goto out;
01c3b861
TM		 4265 request->fl_flags |= FL_ACCESS;
4266 status = do_vfs_lock(request->fl_file, request);
4267 if (status < 0)
4268 goto out;
19e03c57 4269 down_read(&nfsi->rwsem);
01c3b861 4270 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4271 /* Yes: cache locks! */
01c3b861 4272 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4273 request->fl_flags = fl_flags & ~FL_SLEEP;
4274 status = do_vfs_lock(request->fl_file, request);
4275 goto out_unlock;
01c3b861 4276 }
afe6c27c 4277 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4278 if (status != 0)
01c3b861 4279 goto out_unlock;
6bfc93ef 4280 /* Note: we always want to sleep here! */
01c3b861 4281 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4282 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4283 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4284out_unlock:
19e03c57 4285 up_read(&nfsi->rwsem);
01c3b861
TM		 4286out:
4287 request->fl_flags = fl_flags;
1da177e4
LT		 4288 return status;
4289}
4290
4291static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4292{
4293 struct nfs4_exception exception = { };
4294 int err;
4295
4296 do {
965b5d67
TM		 4297 err = _nfs4_proc_setlk(state, cmd, request);
4298 if (err == -NFS4ERR_DENIED)
4299 err = -EAGAIN;
1da177e4 4300 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4301 err, &exception);
1da177e4
LT		 4302 } while (exception.retry);
4303 return err;
4304}
4305
4306static int
4307nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4308{
4309 struct nfs_open_context *ctx;
4310 struct nfs4_state *state;
4311 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4312 int status;
4313
4314 /* verify open state */
cd3758e3 4315 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4316 state = ctx->state;
4317
4318 if (request->fl_start < 0 || request->fl_end < 0)
4319 return -EINVAL;
4320
d953126a
TM		 4321 if (IS_GETLK(cmd)) {
4322 if (state != NULL)
4323 return nfs4_proc_getlk(state, F_GETLK, request);
4324 return 0;
4325 }
1da177e4
LT		 4326
4327 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4328 return -EINVAL;
4329
d953126a
TM		 4330 if (request->fl_type == F_UNLCK) {
4331 if (state != NULL)
4332 return nfs4_proc_unlck(state, cmd, request);
4333 return 0;
4334 }
1da177e4 4335
d953126a
TM		 4336 if (state == NULL)
4337 return -ENOLCK;
1da177e4
LT		 4338 do {
4339 status = nfs4_proc_setlk(state, cmd, request);
4340 if ((status != -EAGAIN) || IS_SETLK(cmd))
4341 break;
4342 timeout = nfs4_set_lock_task_retry(timeout);
4343 status = -ERESTARTSYS;
4344 if (signalled())
4345 break;
4346 } while(status < 0);
1da177e4
LT		 4347 return status;
4348}
4349
888e694c
TM		 4350int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4351{
4352 struct nfs_server *server = NFS_SERVER(state->inode);
4353 struct nfs4_exception exception = { };
4354 int err;
4355
4356 err = nfs4_set_lock_state(state, fl);
4357 if (err != 0)
4358 goto out;
4359 do {
afe6c27c 4360 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4361 switch (err) {
4362 default:
4363 printk(KERN_ERR "%s: unhandled error %d.\n",
4364 __func__, err);
4365 case 0:
965b5d67 4366 case -ESTALE:
d5122201
TM		 4367 goto out;
4368 case -NFS4ERR_EXPIRED:
4369 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4370 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4371 case -NFS4ERR_BADSESSION:
4372 case -NFS4ERR_BADSLOT:
4373 case -NFS4ERR_BAD_HIGH_SLOT:
4374 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4375 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4376 nfs4_schedule_state_recovery(server->nfs_client);
4377 goto out;
965b5d67
TM		 4378 case -ERESTARTSYS:
4379 /*
4380 * The show must go on: exit, but mark the
4381 * stateid as needing recovery.
4382 */
4383 case -NFS4ERR_ADMIN_REVOKED:
4384 case -NFS4ERR_BAD_STATEID:
4385 case -NFS4ERR_OPENMODE:
4386 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4387 err = 0;
4388 goto out;
4389 case -ENOMEM:
4390 case -NFS4ERR_DENIED:
4391 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4392 err = 0;
4393 goto out;
d5122201 4394 case -NFS4ERR_DELAY:
2c643488 4395 case -EKEYEXPIRED:
d5122201
TM		 4396 break;
4397 }
888e694c
TM		 4398 err = nfs4_handle_exception(server, err, &exception);
4399 } while (exception.retry);
4400out:
4401 return err;
4402}
6b3b5496 4403
aa1870af
BF		 4404#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4405
6b3b5496
BF		 4406int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4407 size_t buflen, int flags)
4408{
4b580ee3
BF		 4409 struct inode *inode = dentry->d_inode;
4410
4411 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4412 return -EOPNOTSUPP;
4413
4b580ee3 4414 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4415}
4416
4417/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4418 * and that's what we'll do for e.g. user attributes that haven't been set.
4419 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4420 * attributes in kernel-managed attribute namespaces. */
4421ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4422 size_t buflen)
4423{
aa1870af
BF		 4424 struct inode *inode = dentry->d_inode;
4425
4426 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4427 return -EOPNOTSUPP;
4428
4429 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4430}
4431
4432ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4433{
aa1870af 4434 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4435
096455a2
BF		 4436 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4437 return 0;
6b3b5496
BF		 4438 if (buf && buflen < len)
4439 return -ERANGE;
4440 if (buf)
aa1870af
BF		 4441 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4442 return len;
6b3b5496
BF		 4443}
4444
69aaaae1
TM		 4445static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4446{
4447 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4448 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4449 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4450 return;
4451
4452 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4453 NFS_ATTR_FATTR_NLINK;
4454 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4455 fattr->nlink = 2;
4456}
4457
56659e99 4458int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4459 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4460{
4461 struct nfs_server *server = NFS_SERVER(dir);
4462 u32 bitmask[2] = {
361e624f
MN		 4463 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4464 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4465 };
4466 struct nfs4_fs_locations_arg args = {
4467 .dir_fh = NFS_FH(dir),
c228fd3a 4468 .name = name,
683b57b4
TM		 4469 .page = page,
4470 .bitmask = bitmask,
4471 };
22958463
BH		 4472 struct nfs4_fs_locations_res res = {
4473 .fs_locations = fs_locations,
4474 };
683b57b4
TM		 4475 struct rpc_message msg = {
4476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4477 .rpc_argp = &args,
22958463 4478 .rpc_resp = &res,
683b57b4
TM		 4479 };
4480 int status;
4481
3110ff80 4482 dprintk("%s: start\n", __func__);
c228fd3a 4483 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4484 fs_locations->server = server;
830b8e33 4485 fs_locations->nlocations = 0;
cccef3b9 4486 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4487 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4488 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4489 return status;
4490}
4491
557134a3 4492#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4493/*
4494 * nfs4_proc_exchange_id()
4495 *
4496 * Since the clientid has expired, all compounds using sessions
4497 * associated with the stale clientid will be returning
4498 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4499 * be in some phase of session reset.
4500 */
4d643d1d 4501int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4502{
4503 nfs4_verifier verifier;
4504 struct nfs41_exchange_id_args args = {
4505 .client = clp,
4506 .flags = clp->cl_exchange_flags,
4507 };
4508 struct nfs41_exchange_id_res res = {
4509 .client = clp,
4510 };
4511 int status;
4512 struct rpc_message msg = {
4513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4514 .rpc_argp = &args,
4515 .rpc_resp = &res,
4516 .rpc_cred = cred,
4517 };
4518 __be32 *p;
4519
4520 dprintk("--> %s\n", __func__);
4521 BUG_ON(clp == NULL);
a7b72103 4522
7b183d0d
AB		 4523 /* Remove server-only flags */
4524 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4525
99fe60d0
BH		 4526 p = (u32 *)verifier.data;
4527 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4528 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4529 args.verifier = &verifier;
4530
4531 while (1) {
4532 args.id_len = scnprintf(args.id, sizeof(args.id),
4533 "%s/%s %u",
4534 clp->cl_ipaddr,
4535 rpc_peeraddr2str(clp->cl_rpcclient,
4536 RPC_DISPLAY_ADDR),
4537 clp->cl_id_uniquifier);
4538
4539 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4540
180b62a3 4541 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4542 break;
4543
4544 if (signalled())
4545 break;
4546
4547 if (++clp->cl_id_uniquifier == 0)
4548 break;
4549 }
4550
4551 dprintk("<-- %s status= %d\n", __func__, status);
4552 return status;
4553}
4554
2050f0cc
AA		 4555struct nfs4_get_lease_time_data {
4556 struct nfs4_get_lease_time_args *args;
4557 struct nfs4_get_lease_time_res *res;
4558 struct nfs_client *clp;
4559};
4560
4561static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4562 void *calldata)
4563{
4564 int ret;
4565 struct nfs4_get_lease_time_data *data =
4566 (struct nfs4_get_lease_time_data *)calldata;
4567
4568 dprintk("--> %s\n", __func__);
689cf5c1 4569 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4570 /* just setup sequence, do not trigger session recovery
4571 since we're invoked within one */
4572 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4573 &data->args->la_seq_args,
4574 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4575
4576 BUG_ON(ret == -EAGAIN);
4577 rpc_call_start(task);
4578 dprintk("<-- %s\n", __func__);
4579}
4580
4581/*
4582 * Called from nfs4_state_manager thread for session setup, so don't recover
4583 * from sequence operation or clientid errors.
4584 */
4585static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4586{
4587 struct nfs4_get_lease_time_data *data =
4588 (struct nfs4_get_lease_time_data *)calldata;
4589
4590 dprintk("--> %s\n", __func__);
4591 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4592 switch (task->tk_status) {
4593 case -NFS4ERR_DELAY:
4594 case -NFS4ERR_GRACE:
2c643488 4595 case -EKEYEXPIRED:
2050f0cc
AA		 4596 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4597 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4598 task->tk_status = 0;
0110ee15 4599 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4600 return;
4601 }
2050f0cc
AA		 4602 dprintk("<-- %s\n", __func__);
4603}
4604
4605struct rpc_call_ops nfs4_get_lease_time_ops = {
4606 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4607 .rpc_call_done = nfs4_get_lease_time_done,
4608};
4609
4610int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4611{
4612 struct rpc_task *task;
4613 struct nfs4_get_lease_time_args args;
4614 struct nfs4_get_lease_time_res res = {
4615 .lr_fsinfo = fsinfo,
4616 };
4617 struct nfs4_get_lease_time_data data = {
4618 .args = &args,
4619 .res = &res,
4620 .clp = clp,
4621 };
4622 struct rpc_message msg = {
4623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4624 .rpc_argp = &args,
4625 .rpc_resp = &res,
4626 };
4627 struct rpc_task_setup task_setup = {
4628 .rpc_client = clp->cl_rpcclient,
4629 .rpc_message = &msg,
4630 .callback_ops = &nfs4_get_lease_time_ops,
4631 .callback_data = &data
4632 };
4633 int status;
4634
4635 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4636 dprintk("--> %s\n", __func__);
4637 task = rpc_run_task(&task_setup);
4638
4639 if (IS_ERR(task))
4640 status = PTR_ERR(task);
4641 else {
4642 status = task->tk_status;
4643 rpc_put_task(task);
4644 }
4645 dprintk("<-- %s return %d\n", __func__, status);
4646
4647 return status;
4648}
4649
b73dafa7
RL		 4650/*
4651 * Reset a slot table
4652 */
104aeba4
AA		 4653static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4654 int ivalue)
ac72b7b3 4655{
104aeba4 4656 struct nfs4_slot *new = NULL;
b73dafa7 4657 int i;
ac72b7b3
AA		 4658 int ret = 0;
4659
104aeba4
AA		 4660 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4661 max_reqs, tbl->max_slots);
ac72b7b3 4662
104aeba4
AA		 4663 /* Does the newly negotiated max_reqs match the existing slot table? */
4664 if (max_reqs != tbl->max_slots) {
4665 ret = -ENOMEM;
4666 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4667 GFP_KERNEL);
4668 if (!new)
4669 goto out;
4670 ret = 0;
4671 kfree(tbl->slots);
ac72b7b3
AA		 4672 }
4673 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4674 if (new) {
4675 tbl->slots = new;
4676 tbl->max_slots = max_reqs;
4677 }
4678 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4679 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4680 spin_unlock(&tbl->slot_tbl_lock);
4681 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4682 tbl, tbl->slots, tbl->max_slots);
4683out:
4684 dprintk("<-- %s: return %d\n", __func__, ret);
4685 return ret;
4686}
4687
b73dafa7
RL		 4688/*
4689 * Reset the forechannel and backchannel slot tables
4690 */
4691static int nfs4_reset_slot_tables(struct nfs4_session *session)
4692{
4693 int status;
4694
4695 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4696 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4697 if (status)
4698 return status;
4699
4700 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4701 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4702 return status;
4703}
4704
f8625a6a
RL		 4705/* Destroy the slot table */
4706static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4707{
4708 if (session->fc_slot_table.slots != NULL) {
4709 kfree(session->fc_slot_table.slots);
4710 session->fc_slot_table.slots = NULL;
4711 }
4712 if (session->bc_slot_table.slots != NULL) {
4713 kfree(session->bc_slot_table.slots);
4714 session->bc_slot_table.slots = NULL;
4715 }
4716 return;
4717}
4718
fc931582
AA		 4719/*
4720 * Initialize slot table
4721 */
050047ce
RL		 4722static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4723 int max_slots, int ivalue)
fc931582 4724{
fc931582
AA		 4725 struct nfs4_slot *slot;
4726 int ret = -ENOMEM;
4727
4728 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4729
050047ce 4730 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4731
4732 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4733 if (!slot)
4734 goto out;
fc931582
AA		 4735 ret = 0;
4736
4737 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4738 tbl->max_slots = max_slots;
4739 tbl->slots = slot;
4740 tbl->highest_used_slotid = -1; /* no slot is currently used */
4741 spin_unlock(&tbl->slot_tbl_lock);
4742 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4743 tbl, tbl->slots, tbl->max_slots);
4744out:
4745 dprintk("<-- %s: return %d\n", __func__, ret);
4746 return ret;
fc931582
AA		 4747}
4748
050047ce
RL		 4749/*
4750 * Initialize the forechannel and backchannel tables
4751 */
4752static int nfs4_init_slot_tables(struct nfs4_session *session)
4753{
f26468fb
TM		 4754 struct nfs4_slot_table *tbl;
4755 int status = 0;
050047ce 4756
f26468fb
TM		 4757 tbl = &session->fc_slot_table;
4758 if (tbl->slots == NULL) {
4759 status = nfs4_init_slot_table(tbl,
4760 session->fc_attrs.max_reqs, 1);
4761 if (status)
4762 return status;
4763 }
050047ce 4764
f26468fb
TM		 4765 tbl = &session->bc_slot_table;
4766 if (tbl->slots == NULL) {
4767 status = nfs4_init_slot_table(tbl,
4768 session->bc_attrs.max_reqs, 0);
4769 if (status)
4770 nfs4_destroy_slot_tables(session);
4771 }
f8625a6a
RL		 4772
4773 return status;
557134a3
AA		 4774}
4775
4776struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4777{
4778 struct nfs4_session *session;
4779 struct nfs4_slot_table *tbl;
4780
4781 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4782 if (!session)
4783 return NULL;
76db6d95 4784
76db6d95
AA		 4785 /*
4786 * The create session reply races with the server back
4787 * channel probe. Mark the client NFS_CS_SESSION_INITING
4788 * so that the client back channel can find the
4789 * nfs_client struct
4790 */
4791 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4792 init_completion(&session->complete);
76db6d95 4793
557134a3 4794 tbl = &session->fc_slot_table;
9dfdf404 4795 tbl->highest_used_slotid = -1;
557134a3 4796 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4797 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4798
4799 tbl = &session->bc_slot_table;
9dfdf404 4800 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4801 spin_lock_init(&tbl->slot_tbl_lock);
4802 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4803
557134a3
AA		 4804 session->clp = clp;
4805 return session;
4806}
4807
4808void nfs4_destroy_session(struct nfs4_session *session)
4809{
5a0ffe54
AA		 4810 nfs4_proc_destroy_session(session);
4811 dprintk("%s Destroy backchannel for xprt %p\n",
4812 __func__, session->clp->cl_rpcclient->cl_xprt);
4813 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4814 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4815 nfs4_destroy_slot_tables(session);
557134a3
AA		 4816 kfree(session);
4817}
4818
fc931582
AA		 4819/*
4820 * Initialize the values to be used by the client in CREATE_SESSION
4821 * If nfs4_init_session set the fore channel request and response sizes,
4822 * use them.
4823 *
4824 * Set the back channel max_resp_sz_cached to zero to force the client to
4825 * always set csa_cachethis to FALSE because the current implementation
4826 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4827 */
4828static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4829{
4830 struct nfs4_session *session = args->client->cl_session;
4831 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4832 mxresp_sz = session->fc_attrs.max_resp_sz;
4833
4834 if (mxrqst_sz == 0)
4835 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4836 if (mxresp_sz == 0)
4837 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4838 /* Fore channel attributes */
4839 args->fc_attrs.headerpadsz = 0;
4840 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4841 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4842 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4843 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4844
4845 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4846 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4847 __func__,
4848 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4849 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4850
4851 /* Back channel attributes */
4852 args->bc_attrs.headerpadsz = 0;
4853 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4854 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4855 args->bc_attrs.max_resp_sz_cached = 0;
4856 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4857 args->bc_attrs.max_reqs = 1;
4858
4859 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4860 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4861 __func__,
4862 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4863 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4864 args->bc_attrs.max_reqs);
4865}
4866
8d35301d
AA		 4867static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4868{
4869 if (rcvd <= sent)
4870 return 0;
4871 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4872 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4873 return -EINVAL;
4874}
4875
4876#define _verify_fore_channel_attr(_name_) \
4877 _verify_channel_attr("fore", #_name_, \
4878 args->fc_attrs._name_, \
4879 session->fc_attrs._name_)
4880
4881#define _verify_back_channel_attr(_name_) \
4882 _verify_channel_attr("back", #_name_, \
4883 args->bc_attrs._name_, \
4884 session->bc_attrs._name_)
4885
4886/*
4887 * The server is not allowed to increase the fore channel header pad size,
4888 * maximum response size, or maximum number of operations.
4889 *
4890 * The back channel attributes are only negotiatied down: We send what the
4891 * (back channel) server insists upon.
4892 */
4893static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4894 struct nfs4_session *session)
4895{
4896 int ret = 0;
4897
4898 ret |= _verify_fore_channel_attr(headerpadsz);
4899 ret |= _verify_fore_channel_attr(max_resp_sz);
4900 ret |= _verify_fore_channel_attr(max_ops);
4901
4902 ret |= _verify_back_channel_attr(headerpadsz);
4903 ret |= _verify_back_channel_attr(max_rqst_sz);
4904 ret |= _verify_back_channel_attr(max_resp_sz);
4905 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4906 ret |= _verify_back_channel_attr(max_ops);
4907 ret |= _verify_back_channel_attr(max_reqs);
4908
4909 return ret;
4910}
4911
fc931582
AA		 4912static int _nfs4_proc_create_session(struct nfs_client *clp)
4913{
4914 struct nfs4_session *session = clp->cl_session;
4915 struct nfs41_create_session_args args = {
4916 .client = clp,
4917 .cb_program = NFS4_CALLBACK,
4918 };
4919 struct nfs41_create_session_res res = {
4920 .client = clp,
4921 };
4922 struct rpc_message msg = {
4923 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4924 .rpc_argp = &args,
4925 .rpc_resp = &res,
4926 };
4927 int status;
4928
4929 nfs4_init_channel_attrs(&args);
0f91421e 4930 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4931
4932 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4933
8d35301d
AA		 4934 if (!status)
4935 /* Verify the session's negotiated channel_attrs values */
4936 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4937 if (!status) {
4938 /* Increment the clientid slot sequence id */
4939 clp->cl_seqid++;
4940 }
4941
4942 return status;
4943}
4944
4945/*
4946 * Issues a CREATE_SESSION operation to the server.
4947 * It is the responsibility of the caller to verify the session is
4948 * expired before calling this routine.
4949 */
f26468fb 4950int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4951{
4952 int status;
4953 unsigned *ptr;
fc931582
AA		 4954 struct nfs4_session *session = clp->cl_session;
4955
4956 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4957
4958 status = _nfs4_proc_create_session(clp);
4959 if (status)
4960 goto out;
4961
f26468fb
TM		 4962 /* Init and reset the fore channel */
4963 status = nfs4_init_slot_tables(session);
4964 dprintk("slot table initialization returned %d\n", status);
4965 if (status)
4966 goto out;
4967 status = nfs4_reset_slot_tables(session);
4968 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4969 if (status)
4970 goto out;
4971
4972 ptr = (unsigned *)&session->sess_id.data[0];
4973 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4974 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4975out:
4976 dprintk("<-- %s\n", __func__);
4977 return status;
4978}
4979
0f3e66c6
AA		 4980/*
4981 * Issue the over-the-wire RPC DESTROY_SESSION.
4982 * The caller must serialize access to this routine.
4983 */
4984int nfs4_proc_destroy_session(struct nfs4_session *session)
4985{
4986 int status = 0;
4987 struct rpc_message msg;
4988
4989 dprintk("--> nfs4_proc_destroy_session\n");
4990
4991 /* session is still being setup */
4992 if (session->clp->cl_cons_state != NFS_CS_READY)
4993 return status;
4994
4995 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4996 msg.rpc_argp = session;
4997 msg.rpc_resp = NULL;
4998 msg.rpc_cred = NULL;
4999 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5000
5001 if (status)
5002 printk(KERN_WARNING
5003 "Got error %d from the server on DESTROY_SESSION. "
5004 "Session has been destroyed regardless...\n", status);
5005
5006 dprintk("<-- nfs4_proc_destroy_session\n");
5007 return status;
5008}
5009
fccba804
TM		 5010int nfs4_init_session(struct nfs_server *server)
5011{
5012 struct nfs_client *clp = server->nfs_client;
2449ea2e 5013 struct nfs4_session *session;
68bf05ef 5014 unsigned int rsize, wsize;
fccba804
TM		 5015 int ret;
5016
5017 if (!nfs4_has_session(clp))
5018 return 0;
5019
68bf05ef
AA		 5020 rsize = server->rsize;
5021 if (rsize == 0)
5022 rsize = NFS_MAX_FILE_IO_SIZE;
5023 wsize = server->wsize;
5024 if (wsize == 0)
5025 wsize = NFS_MAX_FILE_IO_SIZE;
5026
2449ea2e 5027 session = clp->cl_session;
68bf05ef
AA		 5028 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5029 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5030
fccba804
TM		 5031 ret = nfs4_recover_expired_lease(server);
5032 if (!ret)
5033 ret = nfs4_check_client_ready(clp);
5034 return ret;
5035}
5036
fc01cea9
AA		 5037/*
5038 * Renew the cl_session lease.
5039 */
5040static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5041{
5042 struct nfs4_sequence_args args;
5043 struct nfs4_sequence_res res;
5044
5045 struct rpc_message msg = {
5046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5047 .rpc_argp = &args,
5048 .rpc_resp = &res,
5049 .rpc_cred = cred,
5050 };
5051
5052 args.sa_cache_this = 0;
5053
5054 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
b257957e 5055 &res, args.sa_cache_this, 1);
fc01cea9
AA		 5056}
5057
dc96aef9
AB		 5058static void nfs41_sequence_release(void *data)
5059{
5060 struct nfs_client *clp = (struct nfs_client *)data;
5061
7135840f
AB		 5062 if (atomic_read(&clp->cl_count) > 1)
5063 nfs4_schedule_state_renewal(clp);
5064 nfs_put_client(clp);
dc96aef9
AB		 5065}
5066
5067static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9
AA		 5068{
5069 struct nfs_client *clp = (struct nfs_client *)data;
5070
5071 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
5072
5073 if (task->tk_status < 0) {
5074 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5075 if (atomic_read(&clp->cl_count) == 1)
5076 goto out;
fc01cea9
AA		 5077
5078 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
5079 == -EAGAIN) {
0110ee15 5080 nfs_restart_rpc(task, clp);
fc01cea9
AA		 5081 return;
5082 }
5083 }
fc01cea9 5084 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5085out:
fc01cea9
AA		 5086 kfree(task->tk_msg.rpc_argp);
5087 kfree(task->tk_msg.rpc_resp);
5088
5089 dprintk("<-- %s\n", __func__);
5090}
5091
5092static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5093{
5094 struct nfs_client *clp;
5095 struct nfs4_sequence_args *args;
5096 struct nfs4_sequence_res *res;
5097
5098 clp = (struct nfs_client *)data;
5099 args = task->tk_msg.rpc_argp;
5100 res = task->tk_msg.rpc_resp;
5101
5102 if (nfs4_setup_sequence(clp, args, res, 0, task))
5103 return;
5104 rpc_call_start(task);
5105}
5106
5107static const struct rpc_call_ops nfs41_sequence_ops = {
5108 .rpc_call_done = nfs41_sequence_call_done,
5109 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5110 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5111};
5112
5113static int nfs41_proc_async_sequence(struct nfs_client *clp,
5114 struct rpc_cred *cred)
5115{
5116 struct nfs4_sequence_args *args;
5117 struct nfs4_sequence_res *res;
5118 struct rpc_message msg = {
5119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5120 .rpc_cred = cred,
5121 };
5122
7135840f
AB		 5123 if (!atomic_inc_not_zero(&clp->cl_count))
5124 return -EIO;
fc01cea9 5125 args = kzalloc(sizeof(*args), GFP_KERNEL);
fc01cea9 5126 res = kzalloc(sizeof(*res), GFP_KERNEL);
7135840f 5127 if (!args || !res) {
fc01cea9 5128 kfree(args);
7dd08a57 5129 kfree(res);
7135840f 5130 nfs_put_client(clp);
fc01cea9
AA		 5131 return -ENOMEM;
5132 }
5133 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
5134 msg.rpc_argp = args;
5135 msg.rpc_resp = res;
5136
5137 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
5138 &nfs41_sequence_ops, (void *)clp);
5139}
5140
fce5c838
RL		 5141struct nfs4_reclaim_complete_data {
5142 struct nfs_client *clp;
5143 struct nfs41_reclaim_complete_args arg;
5144 struct nfs41_reclaim_complete_res res;
5145};
5146
5147static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5148{
5149 struct nfs4_reclaim_complete_data *calldata = data;
5150
b257957e 5151 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
fce5c838
RL		 5152 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
5153 &calldata->res.seq_res, 0, task))
5154 return;
5155
5156 rpc_call_start(task);
5157}
5158
5159static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5160{
5161 struct nfs4_reclaim_complete_data *calldata = data;
5162 struct nfs_client *clp = calldata->clp;
5163 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5164
5165 dprintk("--> %s\n", __func__);
5166 nfs41_sequence_done(clp, res, task->tk_status);
5167 switch (task->tk_status) {
5168 case 0:
5169 case -NFS4ERR_COMPLETE_ALREADY:
5170 break;
5171 case -NFS4ERR_BADSESSION:
5172 case -NFS4ERR_DEADSESSION:
5173 /*
5174 * Handle the session error, but do not retry the operation, as
5175 * we have no way of telling whether the clientid had to be
5176 * reset before we got our reply. If reset, a new wave of
5177 * reclaim operations will follow, containing their own reclaim
5178 * complete. We don't want our retry to get on the way of
5179 * recovery by incorrectly indicating to the server that we're
5180 * done reclaiming state since the process had to be restarted.
5181 */
5182 _nfs4_async_handle_error(task, NULL, clp, NULL);
5183 break;
5184 default:
5185 if (_nfs4_async_handle_error(
5186 task, NULL, clp, NULL) == -EAGAIN) {
5187 rpc_restart_call_prepare(task);
5188 return;
5189 }
5190 }
fce5c838
RL		 5191
5192 dprintk("<-- %s\n", __func__);
5193}
5194
5195static void nfs4_free_reclaim_complete_data(void *data)
5196{
5197 struct nfs4_reclaim_complete_data *calldata = data;
5198
5199 kfree(calldata);
5200}
5201
5202static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5203 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5204 .rpc_call_done = nfs4_reclaim_complete_done,
5205 .rpc_release = nfs4_free_reclaim_complete_data,
5206};
5207
5208/*
5209 * Issue a global reclaim complete.
5210 */
5211static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5212{
5213 struct nfs4_reclaim_complete_data *calldata;
5214 struct rpc_task *task;
5215 struct rpc_message msg = {
5216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5217 };
5218 struct rpc_task_setup task_setup_data = {
5219 .rpc_client = clp->cl_rpcclient,
5220 .rpc_message = &msg,
5221 .callback_ops = &nfs4_reclaim_complete_call_ops,
5222 .flags = RPC_TASK_ASYNC,
5223 };
5224 int status = -ENOMEM;
5225
5226 dprintk("--> %s\n", __func__);
5227 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5228 if (calldata == NULL)
5229 goto out;
5230 calldata->clp = clp;
5231 calldata->arg.one_fs = 0;
5232 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5233
5234 msg.rpc_argp = &calldata->arg;
5235 msg.rpc_resp = &calldata->res;
5236 task_setup_data.callback_data = calldata;
5237 task = rpc_run_task(&task_setup_data);
acf82b85 5238 if (IS_ERR(task)) {
fce5c838 5239 status = PTR_ERR(task);
acf82b85
DC		 5240 goto out;
5241 }
fce5c838 5242 rpc_put_task(task);
acf82b85 5243 return 0;
fce5c838
RL		 5244out:
5245 dprintk("<-- %s status=%d\n", __func__, status);
5246 return status;
5247}
557134a3
AA		 5248#endif /* CONFIG_NFS_V4_1 */
5249
591d71cb 5250struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5251 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5252 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5253 .recover_open = nfs4_open_reclaim,
5254 .recover_lock = nfs4_lock_reclaim,
591d71cb 5255 .establish_clid = nfs4_init_clientid,
90a16617 5256 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5257};
5258
591d71cb
AA		 5259#if defined(CONFIG_NFS_V4_1)
5260struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5261 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5262 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5263 .recover_open = nfs4_open_reclaim,
5264 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5265 .establish_clid = nfs41_init_clientid,
b4b82607 5266 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5267 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5268};
5269#endif /* CONFIG_NFS_V4_1 */
5270
5271struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5272 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5273 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5274 .recover_open = nfs4_open_expired,
5275 .recover_lock = nfs4_lock_expired,
5276 .establish_clid = nfs4_init_clientid,
90a16617 5277 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5278};
5279
5280#if defined(CONFIG_NFS_V4_1)
5281struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5282 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5283 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5284 .recover_open = nfs4_open_expired,
5285 .recover_lock = nfs4_lock_expired,
4d643d1d 5286 .establish_clid = nfs41_init_clientid,
b4b82607 5287 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5288};
591d71cb 5289#endif /* CONFIG_NFS_V4_1 */
1da177e4 5290
29fba38b
BH		 5291struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5292 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5293 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5294 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5295};
5296
5297#if defined(CONFIG_NFS_V4_1)
5298struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5299 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5300 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5301 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5302};
5303#endif
5304
5305/*
5306 * Per minor version reboot and network partition recovery ops
5307 */
5308
591d71cb
AA		 5309struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5310 &nfs40_reboot_recovery_ops,
5311#if defined(CONFIG_NFS_V4_1)
5312 &nfs41_reboot_recovery_ops,
5313#endif
5314};
5315
5316struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5317 &nfs40_nograce_recovery_ops,
5318#if defined(CONFIG_NFS_V4_1)
5319 &nfs41_nograce_recovery_ops,
5320#endif
5321};
5322
29fba38b
BH		 5323struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5324 &nfs40_state_renewal_ops,
5325#if defined(CONFIG_NFS_V4_1)
5326 &nfs41_state_renewal_ops,
5327#endif
5328};
5329
92e1d5be 5330static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5331 .permission = nfs_permission,
5332 .getattr = nfs_getattr,
5333 .setattr = nfs_setattr,
5334 .getxattr = nfs4_getxattr,
5335 .setxattr = nfs4_setxattr,
5336 .listxattr = nfs4_listxattr,
5337};
5338
509de811 5339const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5340 .version = 4, /* protocol version */
5341 .dentry_ops = &nfs4_dentry_operations,
5342 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5343 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5344 .getroot = nfs4_proc_get_root,
5345 .getattr = nfs4_proc_getattr,
5346 .setattr = nfs4_proc_setattr,
2b3de441 5347 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5348 .lookup = nfs4_proc_lookup,
5349 .access = nfs4_proc_access,
5350 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5351 .create = nfs4_proc_create,
5352 .remove = nfs4_proc_remove,
5353 .unlink_setup = nfs4_proc_unlink_setup,
5354 .unlink_done = nfs4_proc_unlink_done,
5355 .rename = nfs4_proc_rename,
5356 .link = nfs4_proc_link,
5357 .symlink = nfs4_proc_symlink,
5358 .mkdir = nfs4_proc_mkdir,
5359 .rmdir = nfs4_proc_remove,
5360 .readdir = nfs4_proc_readdir,
5361 .mknod = nfs4_proc_mknod,
5362 .statfs = nfs4_proc_statfs,
5363 .fsinfo = nfs4_proc_fsinfo,
5364 .pathconf = nfs4_proc_pathconf,
e9326dca 5365 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5366 .decode_dirent = nfs4_decode_dirent,
5367 .read_setup = nfs4_proc_read_setup,
ec06c096 5368 .read_done = nfs4_read_done,
1da177e4 5369 .write_setup = nfs4_proc_write_setup,
788e7a89 5370 .write_done = nfs4_write_done,
1da177e4 5371 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5372 .commit_done = nfs4_commit_done,
1da177e4 5373 .lock = nfs4_proc_lock,
e50a1c2e 5374 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5375 .close_context = nfs4_close_context,
1da177e4
LT		 5376};
5377
5378/*
5379 * Local variables:
5380 * c-basic-offset: 8
5381 * End:
5382 */
Linux 6.x block layer and io_uring tree(s)