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NFSv41: Deprecate nfs_client->cl_minorversion
[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
a2118c33 359 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_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
d185a334 373static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 374{
375 struct nfs4_slot_table *tbl;
376
d185a334 377 tbl = &res->sr_session->fc_slot_table;
13615871 378 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 379 /* just wake up the next guy waiting since
380 * we may have not consumed a slot after all */
691daf3b 381 dprintk("%s: No slot\n", __func__);
35dc1d74 382 return;
13615871 383 }
ea028ac9 384
35dc1d74
TM		 385 spin_lock(&tbl->slot_tbl_lock);
386 nfs4_free_slot(tbl, res->sr_slotid);
d185a334 387 nfs41_check_drain_session_complete(res->sr_session);
35dc1d74
TM		 388 spin_unlock(&tbl->slot_tbl_lock);
389 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 390}
391
d185a334 392static void nfs41_sequence_done(struct nfs4_sequence_res *res)
b0df806c
AA		 393{
394 unsigned long timestamp;
395 struct nfs4_slot_table *tbl;
396 struct nfs4_slot *slot;
397
398 /*
399 * sr_status remains 1 if an RPC level error occurred. The server
400 * may or may not have processed the sequence operation..
401 * Proceed as if the server received and processed the sequence
402 * operation.
403 */
404 if (res->sr_status == 1)
405 res->sr_status = NFS_OK;
406
407 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
408 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
409 goto out;
410
691daf3b 411 /* Check the SEQUENCE operation status */
b0df806c 412 if (res->sr_status == 0) {
d185a334
TM		 413 struct nfs_client *clp = res->sr_session->clp;
414 tbl = &res->sr_session->fc_slot_table;
691daf3b 415 slot = tbl->slots + res->sr_slotid;
b0df806c
AA		 416 /* Update the slot's sequence and clientid lease timer */
417 ++slot->seq_nr;
418 timestamp = res->sr_renewal_time;
419 spin_lock(&clp->cl_lock);
420 if (time_before(clp->cl_last_renewal, timestamp))
421 clp->cl_last_renewal = timestamp;
422 spin_unlock(&clp->cl_lock);
0629e370 423 /* Check sequence flags */
7135840f
AB		 424 if (atomic_read(&clp->cl_count) > 1)
425 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
b0df806c
AA		 426 }
427out:
428 /* The session may be reset by one of the error handlers. */
429 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 430 nfs41_sequence_free_slot(res);
b0df806c
AA		 431}
432
df896455
TM		 433static void nfs4_sequence_done(const struct nfs_server *server,
434 struct nfs4_sequence_res *res, int rpc_status)
435{
436 if (res->sr_session != NULL)
437 nfs41_sequence_done(res);
438}
439
510b8175
BH		 440/*
441 * nfs4_find_slot - efficiently look for a free slot
442 *
443 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
444 * If found, we mark the slot as used, update the highest_used_slotid,
445 * and respectively set up the sequence operation args.
446 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 447 *
448 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 449 */
450static u8
40ead580 451nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 452{
453 int slotid;
454 u8 ret_id = NFS4_MAX_SLOT_TABLE;
455 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
456
510b8175
BH		 457 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
458 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
459 tbl->max_slots);
460 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
461 if (slotid >= tbl->max_slots)
462 goto out;
463 __set_bit(slotid, tbl->used_slots);
464 if (slotid > tbl->highest_used_slotid)
465 tbl->highest_used_slotid = slotid;
466 ret_id = slotid;
467out:
468 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
469 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 470 return ret_id;
471}
472
ce5039c1
AA		 473static int nfs41_setup_sequence(struct nfs4_session *session,
474 struct nfs4_sequence_args *args,
475 struct nfs4_sequence_res *res,
476 int cache_reply,
477 struct rpc_task *task)
478{
fbcd4abc
AA		 479 struct nfs4_slot *slot;
480 struct nfs4_slot_table *tbl;
481 u8 slotid;
482
483 dprintk("--> %s\n", __func__);
ce5039c1
AA		 484 /* slot already allocated? */
485 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
486 return 0;
487
ce5039c1 488 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 489 tbl = &session->fc_slot_table;
490
491 spin_lock(&tbl->slot_tbl_lock);
a2118c33 492 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 493 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 494 /*
495 * The state manager will wait until the slot table is empty.
496 * Schedule the reset thread
497 */
05f0d236 498 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 499 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 500 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 501 return -EAGAIN;
b069d94a
AA		 502 }
503
689cf5c1
AB		 504 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
505 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
506 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
507 spin_unlock(&tbl->slot_tbl_lock);
508 dprintk("%s enforce FIFO order\n", __func__);
509 return -EAGAIN;
510 }
511
40ead580 512 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 513 if (slotid == NFS4_MAX_SLOT_TABLE) {
514 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
515 spin_unlock(&tbl->slot_tbl_lock);
516 dprintk("<-- %s: no free slots\n", __func__);
517 return -EAGAIN;
518 }
519 spin_unlock(&tbl->slot_tbl_lock);
520
689cf5c1 521 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 522 slot = tbl->slots + slotid;
99fe60d0 523 args->sa_session = session;
fbcd4abc
AA		 524 args->sa_slotid = slotid;
525 args->sa_cache_this = cache_reply;
526
527 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
528
99fe60d0 529 res->sr_session = session;
fbcd4abc
AA		 530 res->sr_slotid = slotid;
531 res->sr_renewal_time = jiffies;
2a6e26cd 532 res->sr_status_flags = 0;
fbcd4abc
AA		 533 /*
534 * sr_status is only set in decode_sequence, and so will remain
535 * set to 1 if an rpc level failure occurs.
536 */
537 res->sr_status = 1;
ce5039c1
AA		 538 return 0;
539}
540
035168ab 541int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 542 struct nfs4_sequence_args *args,
543 struct nfs4_sequence_res *res,
544 int cache_reply,
545 struct rpc_task *task)
546{
035168ab 547 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 548 int ret = 0;
549
035168ab
TM		 550 if (session == NULL) {
551 args->sa_session = NULL;
552 res->sr_session = NULL;
553 goto out;
554 }
555
ce5039c1 556 dprintk("--> %s clp %p session %p sr_slotid %d\n",
035168ab 557 __func__, session->clp, session, res->sr_slotid);
ce5039c1 558
035168ab 559 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 560 task);
ce5039c1
AA		 561out:
562 dprintk("<-- %s status=%d\n", __func__, ret);
563 return ret;
564}
565
566struct nfs41_call_sync_data {
035168ab 567 const struct nfs_server *seq_server;
ce5039c1
AA		 568 struct nfs4_sequence_args *seq_args;
569 struct nfs4_sequence_res *seq_res;
570 int cache_reply;
571};
572
573static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
574{
575 struct nfs41_call_sync_data *data = calldata;
576
035168ab
TM		 577 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
578
579 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 580 data->seq_res, data->cache_reply, task))
581 return;
582 rpc_call_start(task);
583}
584
b257957e
AB		 585static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
586{
587 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
588 nfs41_call_sync_prepare(task, calldata);
589}
590
69ab40c4
AA		 591static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
592{
593 struct nfs41_call_sync_data *data = calldata;
594
d185a334 595 nfs41_sequence_done(data->seq_res);
69ab40c4
AA		 596}
597
ce5039c1
AA		 598struct rpc_call_ops nfs41_call_sync_ops = {
599 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 600 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 601};
602
b257957e
AB		 603struct rpc_call_ops nfs41_call_priv_sync_ops = {
604 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
605 .rpc_call_done = nfs41_call_sync_done,
606};
607
035168ab 608static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 609 struct rpc_message *msg,
610 struct nfs4_sequence_args *args,
611 struct nfs4_sequence_res *res,
b257957e
AB		 612 int cache_reply,
613 int privileged)
ce5039c1
AA		 614{
615 int ret;
616 struct rpc_task *task;
617 struct nfs41_call_sync_data data = {
035168ab 618 .seq_server = server,
ce5039c1
AA		 619 .seq_args = args,
620 .seq_res = res,
621 .cache_reply = cache_reply,
622 };
623 struct rpc_task_setup task_setup = {
035168ab 624 .rpc_client = server->client,
ce5039c1
AA		 625 .rpc_message = msg,
626 .callback_ops = &nfs41_call_sync_ops,
627 .callback_data = &data
628 };
629
630 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 631 if (privileged)
632 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 633 task = rpc_run_task(&task_setup);
634 if (IS_ERR(task))
635 ret = PTR_ERR(task);
636 else {
637 ret = task->tk_status;
638 rpc_put_task(task);
639 }
640 return ret;
641}
642
cccef3b9
AA		 643int _nfs4_call_sync_session(struct nfs_server *server,
644 struct rpc_message *msg,
645 struct nfs4_sequence_args *args,
646 struct nfs4_sequence_res *res,
647 int cache_reply)
648{
035168ab 649 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 650}
651
df896455
TM		 652#else
653static void nfs4_sequence_done(const struct nfs_server *server,
654 struct nfs4_sequence_res *res, int rpc_status)
655{
656}
cccef3b9
AA		 657#endif /* CONFIG_NFS_V4_1 */
658
659int _nfs4_call_sync(struct nfs_server *server,
660 struct rpc_message *msg,
661 struct nfs4_sequence_args *args,
662 struct nfs4_sequence_res *res,
663 int cache_reply)
664{
f3752975 665 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 666 return rpc_call_sync(server->client, msg, 0);
667}
668
669#define nfs4_call_sync(server, msg, args, res, cache_reply) \
97dc1359 670 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
cccef3b9
AA		 671 &(res)->seq_res, (cache_reply))
672
38478b24 673static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 674{
38478b24 675 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 676
38478b24 677 spin_lock(&dir->i_lock);
40d24704
TM		 678 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
679 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 680 nfs_force_lookup_revalidate(dir);
40d24704 681 nfsi->change_attr = cinfo->after;
38478b24 682 spin_unlock(&dir->i_lock);
1da177e4
LT		 683}
684
e56e0b78 685struct nfs4_opendata {
c6d00e63 686 struct kref kref;
e56e0b78
TM		 687 struct nfs_openargs o_arg;
688 struct nfs_openres o_res;
cdd4e68b
TM		 689 struct nfs_open_confirmargs c_arg;
690 struct nfs_open_confirmres c_res;
e56e0b78
TM		 691 struct nfs_fattr f_attr;
692 struct nfs_fattr dir_attr;
ad389da7 693 struct path path;
e56e0b78
TM		 694 struct dentry *dir;
695 struct nfs4_state_owner *owner;
aac00a8d 696 struct nfs4_state *state;
e56e0b78 697 struct iattr attrs;
26e976a8 698 unsigned long timestamp;
3e309914 699 unsigned int rpc_done : 1;
24ac23ab
TM		 700 int rpc_status;
701 int cancelled;
e56e0b78
TM		 702};
703
2ced46c2
TM		 704
705static void nfs4_init_opendata_res(struct nfs4_opendata *p)
706{
707 p->o_res.f_attr = &p->f_attr;
708 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 709 p->o_res.seqid = p->o_arg.seqid;
710 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 711 p->o_res.server = p->o_arg.server;
712 nfs_fattr_init(&p->f_attr);
713 nfs_fattr_init(&p->dir_attr);
578e4585 714 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 715}
716
ad389da7 717static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 718 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 719 const struct iattr *attrs,
720 gfp_t gfp_mask)
e56e0b78 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
8535b2be 727 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 728 if (p == NULL)
729 goto err;
8535b2be 730 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 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
8535b2be 1066 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
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;
035168ab 1364 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 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;
8535b2be 1654 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
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;
035168ab 1905 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 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 */
8535b2be 1929int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, 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
8535b2be 1948 calldata = kzalloc(sizeof(*calldata), gfp_mask);
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 */
8535b2be 1956 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 1957 if (calldata->arg.seqid == NULL)
1958 goto out_free_calldata;
dc0b027d 1959 calldata->arg.fmode = 0;
a65318bf 1960 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1961 calldata->res.fattr = &calldata->fattr;
c1d51931 1962 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1963 calldata->res.server = server;
5f7dbd5c 1964 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
f6948697
AV		 1965 path_get(path);
1966 calldata->path = *path;
9512135d 1967
5138fde0
TM		 1968 msg.rpc_argp = &calldata->arg,
1969 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1970 task_setup_data.callback_data = calldata;
1971 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1972 if (IS_ERR(task))
1973 return PTR_ERR(task);
a49c3c77
TM		 1974 status = 0;
1975 if (wait)
1976 status = rpc_wait_for_completion_task(task);
b39e625b 1977 rpc_put_task(task);
a49c3c77 1978 return status;
9512135d
TM		 1979out_free_calldata:
1980 kfree(calldata);
1981out:
b39e625b
TM		 1982 nfs4_put_open_state(state);
1983 nfs4_put_state_owner(sp);
9512135d 1984 return status;
1da177e4
LT		 1985}
1986
dc0b027d 1987static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1988{
1989 struct file *filp;
1b45c46c 1990 int ret;
02a913a7 1991
1b45c46c 1992 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1993 if (fmode & FMODE_EXEC) {
af22f94a 1994 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1995 state->owner->so_cred,
1996 nd->intent.open.flags);
1997 if (ret < 0)
1998 goto out_close;
1999 }
4a35bd41 2000 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 2001 if (!IS_ERR(filp)) {
2002 struct nfs_open_context *ctx;
cd3758e3 2003 ctx = nfs_file_open_context(filp);
02a913a7 2004 ctx->state = state;
95cf959b
TM		 2005 return 0;
2006 }
1b45c46c
TM		 2007 ret = PTR_ERR(filp);
2008out_close:
dc0b027d 2009 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 2010 return ret;
02a913a7
TM		 2011}
2012
2013struct dentry *
1da177e4
LT		 2014nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
2015{
ad389da7 2016 struct path path = {
4ac91378 2017 .mnt = nd->path.mnt,
ad389da7
TM		 2018 .dentry = dentry,
2019 };
4ac91378 2020 struct dentry *parent;
1da177e4
LT		 2021 struct iattr attr;
2022 struct rpc_cred *cred;
2023 struct nfs4_state *state;
02a913a7 2024 struct dentry *res;
dc0b027d 2025 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2026
2027 if (nd->flags & LOOKUP_CREATE) {
2028 attr.ia_mode = nd->intent.open.create_mode;
2029 attr.ia_valid = ATTR_MODE;
2030 if (!IS_POSIXACL(dir))
ce3b0f8d 2031 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2032 } else {
2033 attr.ia_valid = 0;
2034 BUG_ON(nd->intent.open.flags & O_CREAT);
2035 }
2036
98a8e323 2037 cred = rpc_lookup_cred();
1da177e4 2038 if (IS_ERR(cred))
02a913a7 2039 return (struct dentry *)cred;
565277f6
TM		 2040 parent = dentry->d_parent;
2041 /* Protect against concurrent sillydeletes */
2042 nfs_block_sillyrename(parent);
dc0b027d 2043 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2044 put_rpccred(cred);
02a913a7 2045 if (IS_ERR(state)) {
d75340cc 2046 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2047 d_add(dentry, NULL);
d75340cc
TM		 2048 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2049 }
565277f6 2050 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2051 return (struct dentry *)state;
2052 }
24ac23ab 2053 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2054 if (res != NULL)
deee9369 2055 path.dentry = res;
d75340cc 2056 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2057 nfs_unblock_sillyrename(parent);
dc0b027d 2058 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2059 return res;
1da177e4
LT		 2060}
2061
2062int
02a913a7 2063nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2064{
ad389da7 2065 struct path path = {
4ac91378 2066 .mnt = nd->path.mnt,
ad389da7
TM		 2067 .dentry = dentry,
2068 };
1da177e4
LT		 2069 struct rpc_cred *cred;
2070 struct nfs4_state *state;
dc0b027d 2071 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2072
98a8e323 2073 cred = rpc_lookup_cred();
1da177e4
LT		 2074 if (IS_ERR(cred))
2075 return PTR_ERR(cred);
dc0b027d 2076 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2077 put_rpccred(cred);
02a913a7
TM		 2078 if (IS_ERR(state)) {
2079 switch (PTR_ERR(state)) {
2080 case -EPERM:
2081 case -EACCES:
2082 case -EDQUOT:
2083 case -ENOSPC:
2084 case -EROFS:
04287f97 2085 return PTR_ERR(state);
b87c0adf
CL		 2086 default:
2087 goto out_drop;
02a913a7 2088 }
02a913a7 2089 }
24ac23ab 2090 if (state->inode == dentry->d_inode) {
d75340cc 2091 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2092 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2093 return 1;
2094 }
dc0b027d 2095 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2096out_drop:
2097 d_drop(dentry);
1da177e4
LT		 2098 return 0;
2099}
2100
1185a552 2101static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2102{
2103 if (ctx->state == NULL)
2104 return;
2105 if (is_sync)
2106 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2107 else
2108 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2109}
1da177e4
LT		 2110
2111static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2112{
43652ad5
BH		 2113 struct nfs4_server_caps_arg args = {
2114 .fhandle = fhandle,
2115 };
1da177e4
LT		 2116 struct nfs4_server_caps_res res = {};
2117 struct rpc_message msg = {
2118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2119 .rpc_argp = &args,
1da177e4
LT		 2120 .rpc_resp = &res,
2121 };
2122 int status;
2123
cccef3b9 2124 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2125 if (status == 0) {
2126 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2127 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2128 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2129 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2130 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2131 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2132 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2133 server->caps |= NFS_CAP_ACLS;
2134 if (res.has_links != 0)
2135 server->caps |= NFS_CAP_HARDLINKS;
2136 if (res.has_symlinks != 0)
2137 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2138 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2139 server->caps |= NFS_CAP_FILEID;
2140 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2141 server->caps |= NFS_CAP_MODE;
2142 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2143 server->caps |= NFS_CAP_NLINK;
2144 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2145 server->caps |= NFS_CAP_OWNER;
2146 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2147 server->caps |= NFS_CAP_OWNER_GROUP;
2148 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2149 server->caps |= NFS_CAP_ATIME;
2150 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2151 server->caps |= NFS_CAP_CTIME;
2152 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2153 server->caps |= NFS_CAP_MTIME;
2154
a65318bf
TM		 2155 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2156 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2157 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2158 server->acl_bitmask = res.acl_bitmask;
2159 }
cccef3b9 2160
1da177e4
LT		 2161 return status;
2162}
2163
55a97593 2164int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2165{
2166 struct nfs4_exception exception = { };
2167 int err;
2168 do {
2169 err = nfs4_handle_exception(server,
2170 _nfs4_server_capabilities(server, fhandle),
2171 &exception);
2172 } while (exception.retry);
2173 return err;
2174}
2175
2176static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2177 struct nfs_fsinfo *info)
2178{
1da177e4
LT		 2179 struct nfs4_lookup_root_arg args = {
2180 .bitmask = nfs4_fattr_bitmap,
2181 };
2182 struct nfs4_lookup_res res = {
2183 .server = server,
0e574af1 2184 .fattr = info->fattr,
1da177e4
LT		 2185 .fh = fhandle,
2186 };
2187 struct rpc_message msg = {
2188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2189 .rpc_argp = &args,
2190 .rpc_resp = &res,
2191 };
008f55d0 2192
0e574af1 2193 nfs_fattr_init(info->fattr);
fccba804 2194 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2195}
2196
2197static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2198 struct nfs_fsinfo *info)
2199{
2200 struct nfs4_exception exception = { };
2201 int err;
2202 do {
2203 err = nfs4_handle_exception(server,
2204 _nfs4_lookup_root(server, fhandle, info),
2205 &exception);
2206 } while (exception.retry);
2207 return err;
2208}
2209
54ceac45
DH		 2210/*
2211 * get the file handle for the "/" directory on the server
2212 */
1da177e4 2213static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2214 struct nfs_fsinfo *info)
1da177e4 2215{
1da177e4
LT		 2216 int status;
2217
1da177e4 2218 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2219 if (status == 0)
2220 status = nfs4_server_capabilities(server, fhandle);
2221 if (status == 0)
2222 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2223 return nfs4_map_errors(status);
1da177e4
LT		 2224}
2225
6b97fd3d
MN		 2226/*
2227 * Get locations and (maybe) other attributes of a referral.
2228 * Note that we'll actually follow the referral later when
2229 * we detect fsid mismatch in inode revalidation
2230 */
56659e99 2231static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2232{
2233 int status = -ENOMEM;
2234 struct page *page = NULL;
2235 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2236
2237 page = alloc_page(GFP_KERNEL);
2238 if (page == NULL)
2239 goto out;
2240 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2241 if (locations == NULL)
2242 goto out;
2243
c228fd3a 2244 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2245 if (status != 0)
2246 goto out;
2247 /* Make sure server returned a different fsid for the referral */
2248 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2249 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2250 status = -EIO;
2251 goto out;
2252 }
2253
2254 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2255 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2256 if (!fattr->mode)
2257 fattr->mode = S_IFDIR;
2258 memset(fhandle, 0, sizeof(struct nfs_fh));
2259out:
2260 if (page)
2261 __free_page(page);
2262 if (locations)
2263 kfree(locations);
2264 return status;
2265}
2266
1da177e4
LT		 2267static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2268{
2269 struct nfs4_getattr_arg args = {
2270 .fh = fhandle,
2271 .bitmask = server->attr_bitmask,
2272 };
2273 struct nfs4_getattr_res res = {
2274 .fattr = fattr,
2275 .server = server,
2276 };
2277 struct rpc_message msg = {
2278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2279 .rpc_argp = &args,
2280 .rpc_resp = &res,
2281 };
2282
0e574af1 2283 nfs_fattr_init(fattr);
cccef3b9 2284 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2285}
2286
2287static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2288{
2289 struct nfs4_exception exception = { };
2290 int err;
2291 do {
2292 err = nfs4_handle_exception(server,
2293 _nfs4_proc_getattr(server, fhandle, fattr),
2294 &exception);
2295 } while (exception.retry);
2296 return err;
2297}
2298
2299/*
2300 * The file is not closed if it is opened due to the a request to change
2301 * the size of the file. The open call will not be needed once the
2302 * VFS layer lookup-intents are implemented.
2303 *
2304 * Close is called when the inode is destroyed.
2305 * If we haven't opened the file for O_WRONLY, we
2306 * need to in the size_change case to obtain a stateid.
2307 *
2308 * Got race?
2309 * Because OPEN is always done by name in nfsv4, it is
2310 * possible that we opened a different file by the same
2311 * name. We can recognize this race condition, but we
2312 * can't do anything about it besides returning an error.
2313 *
2314 * This will be fixed with VFS changes (lookup-intent).
2315 */
2316static int
2317nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2318 struct iattr *sattr)
2319{
08e9eac4 2320 struct inode *inode = dentry->d_inode;
659bfcd6 2321 struct rpc_cred *cred = NULL;
d530838b 2322 struct nfs4_state *state = NULL;
1da177e4
LT		 2323 int status;
2324
0e574af1 2325 nfs_fattr_init(fattr);
1da177e4 2326
d530838b 2327 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2328 if (sattr->ia_valid & ATTR_FILE) {
2329 struct nfs_open_context *ctx;
2330
2331 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2332 if (ctx) {
2333 cred = ctx->cred;
2334 state = ctx->state;
2335 }
659bfcd6 2336 }
08e9eac4 2337
659bfcd6 2338 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2339 if (status == 0)
2340 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2341 return status;
2342}
2343
56659e99
TM		 2344static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2345 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2346 struct nfs_fattr *fattr)
2347{
2348 int status;
2349 struct nfs4_lookup_arg args = {
2350 .bitmask = server->attr_bitmask,
2351 .dir_fh = dirfh,
2352 .name = name,
2353 };
2354 struct nfs4_lookup_res res = {
2355 .server = server,
2356 .fattr = fattr,
2357 .fh = fhandle,
2358 };
2359 struct rpc_message msg = {
2360 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2361 .rpc_argp = &args,
2362 .rpc_resp = &res,
2363 };
2364
2365 nfs_fattr_init(fattr);
2366
2367 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2368 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2369 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2370 return status;
2371}
2372
2373static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2374 struct qstr *name, struct nfs_fh *fhandle,
2375 struct nfs_fattr *fattr)
2376{
2377 struct nfs4_exception exception = { };
2378 int err;
2379 do {
4e56e082
TM		 2380 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2381 /* FIXME: !!!! */
2382 if (err == -NFS4ERR_MOVED) {
2383 err = -EREMOTE;
2384 break;
2385 }
2386 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2387 } while (exception.retry);
2388 return err;
2389}
2390
56659e99 2391static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2392 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2393{
4e56e082 2394 int status;
1da177e4
LT		 2395
2396 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2397 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2398 if (status == -NFS4ERR_MOVED)
2399 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2400 dprintk("NFS reply lookup: %d\n", status);
2401 return status;
2402}
2403
2404static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2405{
2406 struct nfs4_exception exception = { };
2407 int err;
2408 do {
2409 err = nfs4_handle_exception(NFS_SERVER(dir),
2410 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2411 &exception);
2412 } while (exception.retry);
2413 return err;
2414}
2415
2416static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2417{
76b32999 2418 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2419 struct nfs4_accessargs args = {
2420 .fh = NFS_FH(inode),
76b32999
TM		 2421 .bitmask = server->attr_bitmask,
2422 };
2423 struct nfs4_accessres res = {
2424 .server = server,
1da177e4 2425 };
1da177e4
LT		 2426 struct rpc_message msg = {
2427 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2428 .rpc_argp = &args,
2429 .rpc_resp = &res,
2430 .rpc_cred = entry->cred,
2431 };
2432 int mode = entry->mask;
2433 int status;
2434
2435 /*
2436 * Determine which access bits we want to ask for...
2437 */
2438 if (mode & MAY_READ)
2439 args.access |= NFS4_ACCESS_READ;
2440 if (S_ISDIR(inode->i_mode)) {
2441 if (mode & MAY_WRITE)
2442 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2443 if (mode & MAY_EXEC)
2444 args.access |= NFS4_ACCESS_LOOKUP;
2445 } else {
2446 if (mode & MAY_WRITE)
2447 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2448 if (mode & MAY_EXEC)
2449 args.access |= NFS4_ACCESS_EXECUTE;
2450 }
c407d41a
TM		 2451
2452 res.fattr = nfs_alloc_fattr();
2453 if (res.fattr == NULL)
2454 return -ENOMEM;
2455
cccef3b9 2456 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2457 if (!status) {
2458 entry->mask = 0;
2459 if (res.access & NFS4_ACCESS_READ)
2460 entry->mask |= MAY_READ;
2461 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2462 entry->mask |= MAY_WRITE;
2463 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2464 entry->mask |= MAY_EXEC;
c407d41a 2465 nfs_refresh_inode(inode, res.fattr);
1da177e4 2466 }
c407d41a 2467 nfs_free_fattr(res.fattr);
1da177e4
LT		 2468 return status;
2469}
2470
2471static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2472{
2473 struct nfs4_exception exception = { };
2474 int err;
2475 do {
2476 err = nfs4_handle_exception(NFS_SERVER(inode),
2477 _nfs4_proc_access(inode, entry),
2478 &exception);
2479 } while (exception.retry);
2480 return err;
2481}
2482
2483/*
2484 * TODO: For the time being, we don't try to get any attributes
2485 * along with any of the zero-copy operations READ, READDIR,
2486 * READLINK, WRITE.
2487 *
2488 * In the case of the first three, we want to put the GETATTR
2489 * after the read-type operation -- this is because it is hard
2490 * to predict the length of a GETATTR response in v4, and thus
2491 * align the READ data correctly. This means that the GETATTR
2492 * may end up partially falling into the page cache, and we should
2493 * shift it into the 'tail' of the xdr_buf before processing.
2494 * To do this efficiently, we need to know the total length
2495 * of data received, which doesn't seem to be available outside
2496 * of the RPC layer.
2497 *
2498 * In the case of WRITE, we also want to put the GETATTR after
2499 * the operation -- in this case because we want to make sure
2500 * we get the post-operation mtime and size. This means that
2501 * we can't use xdr_encode_pages() as written: we need a variant
2502 * of it which would leave room in the 'tail' iovec.
2503 *
2504 * Both of these changes to the XDR layer would in fact be quite
2505 * minor, but I decided to leave them for a subsequent patch.
2506 */
2507static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2508 unsigned int pgbase, unsigned int pglen)
2509{
2510 struct nfs4_readlink args = {
2511 .fh = NFS_FH(inode),
2512 .pgbase = pgbase,
2513 .pglen = pglen,
2514 .pages = &page,
2515 };
f50c7000 2516 struct nfs4_readlink_res res;
1da177e4
LT		 2517 struct rpc_message msg = {
2518 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2519 .rpc_argp = &args,
f50c7000 2520 .rpc_resp = &res,
1da177e4
LT		 2521 };
2522
cccef3b9 2523 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2524}
2525
2526static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2527 unsigned int pgbase, unsigned int pglen)
2528{
2529 struct nfs4_exception exception = { };
2530 int err;
2531 do {
2532 err = nfs4_handle_exception(NFS_SERVER(inode),
2533 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2534 &exception);
2535 } while (exception.retry);
2536 return err;
2537}
2538
1da177e4
LT		 2539/*
2540 * Got race?
2541 * We will need to arrange for the VFS layer to provide an atomic open.
2542 * Until then, this create/open method is prone to inefficiency and race
2543 * conditions due to the lookup, create, and open VFS calls from sys_open()
2544 * placed on the wire.
2545 *
2546 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2547 * The file will be opened again in the subsequent VFS open call
2548 * (nfs4_proc_file_open).
2549 *
2550 * The open for read will just hang around to be used by any process that
2551 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2552 */
2553
2554static int
2555nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2556 int flags, struct nameidata *nd)
1da177e4 2557{
ad389da7 2558 struct path path = {
4ac91378 2559 .mnt = nd->path.mnt,
ad389da7
TM		 2560 .dentry = dentry,
2561 };
1da177e4
LT		 2562 struct nfs4_state *state;
2563 struct rpc_cred *cred;
dc0b027d 2564 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2565 int status = 0;
2566
98a8e323 2567 cred = rpc_lookup_cred();
1da177e4
LT		 2568 if (IS_ERR(cred)) {
2569 status = PTR_ERR(cred);
2570 goto out;
2571 }
dc0b027d 2572 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2573 d_drop(dentry);
1da177e4
LT		 2574 if (IS_ERR(state)) {
2575 status = PTR_ERR(state);
659bfcd6 2576 goto out_putcred;
1da177e4 2577 }
d4d9cdcb 2578 d_add(dentry, igrab(state->inode));
d75340cc 2579 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
ad389da7 2580 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2581 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2582 else
dc0b027d 2583 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2584out_putcred:
2585 put_rpccred(cred);
1da177e4
LT		 2586out:
2587 return status;
2588}
2589
2590static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2591{
16e42959 2592 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2593 struct nfs_removeargs args = {
1da177e4 2594 .fh = NFS_FH(dir),
4fdc17b2
TM		 2595 .name.len = name->len,
2596 .name.name = name->name,
16e42959
TM		 2597 .bitmask = server->attr_bitmask,
2598 };
4fdc17b2 2599 struct nfs_removeres res = {
16e42959 2600 .server = server,
1da177e4 2601 };
1da177e4 2602 struct rpc_message msg = {
4fdc17b2
TM		 2603 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2604 .rpc_argp = &args,
2605 .rpc_resp = &res,
1da177e4 2606 };
d346890b
TM		 2607 int status = -ENOMEM;
2608
2609 res.dir_attr = nfs_alloc_fattr();
2610 if (res.dir_attr == NULL)
2611 goto out;
1da177e4 2612
cccef3b9 2613 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2614 if (status == 0) {
2615 update_changeattr(dir, &res.cinfo);
d346890b 2616 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2617 }
d346890b
TM		 2618 nfs_free_fattr(res.dir_attr);
2619out:
1da177e4
LT		 2620 return status;
2621}
2622
2623static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2624{
2625 struct nfs4_exception exception = { };
2626 int err;
2627 do {
2628 err = nfs4_handle_exception(NFS_SERVER(dir),
2629 _nfs4_proc_remove(dir, name),
2630 &exception);
2631 } while (exception.retry);
2632 return err;
2633}
2634
e4eff1a6 2635static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2636{
e4eff1a6
TM		 2637 struct nfs_server *server = NFS_SERVER(dir);
2638 struct nfs_removeargs *args = msg->rpc_argp;
2639 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2640
a65318bf 2641 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2642 res->server = server;
1da177e4 2643 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2644}
2645
e4eff1a6 2646static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2647{
e4eff1a6
TM		 2648 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2649
472cfbd9 2650 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2651 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2652 return 0;
2653 update_changeattr(dir, &res->cinfo);
d346890b 2654 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2655 return 1;
1da177e4
LT		 2656}
2657
2658static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2659 struct inode *new_dir, struct qstr *new_name)
2660{
6caf2c82 2661 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2662 struct nfs4_rename_arg arg = {
2663 .old_dir = NFS_FH(old_dir),
2664 .new_dir = NFS_FH(new_dir),
2665 .old_name = old_name,
2666 .new_name = new_name,
6caf2c82
TM		 2667 .bitmask = server->attr_bitmask,
2668 };
6caf2c82
TM		 2669 struct nfs4_rename_res res = {
2670 .server = server,
1da177e4 2671 };
1da177e4
LT		 2672 struct rpc_message msg = {
2673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2674 .rpc_argp = &arg,
2675 .rpc_resp = &res,
2676 };
011fff72 2677 int status = -ENOMEM;
1da177e4 2678
011fff72
TM		 2679 res.old_fattr = nfs_alloc_fattr();
2680 res.new_fattr = nfs_alloc_fattr();
2681 if (res.old_fattr == NULL || res.new_fattr == NULL)
2682 goto out;
1da177e4 2683
011fff72 2684 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2685 if (!status) {
2686 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2687 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2688 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2689 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2690 }
011fff72
TM		 2691out:
2692 nfs_free_fattr(res.new_fattr);
2693 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2694 return status;
2695}
2696
2697static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2698 struct inode *new_dir, struct qstr *new_name)
2699{
2700 struct nfs4_exception exception = { };
2701 int err;
2702 do {
2703 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2704 _nfs4_proc_rename(old_dir, old_name,
2705 new_dir, new_name),
2706 &exception);
2707 } while (exception.retry);
2708 return err;
2709}
2710
2711static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2712{
91ba2eee 2713 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2714 struct nfs4_link_arg arg = {
2715 .fh = NFS_FH(inode),
2716 .dir_fh = NFS_FH(dir),
2717 .name = name,
91ba2eee
TM		 2718 .bitmask = server->attr_bitmask,
2719 };
91ba2eee
TM		 2720 struct nfs4_link_res res = {
2721 .server = server,
1da177e4 2722 };
1da177e4
LT		 2723 struct rpc_message msg = {
2724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2725 .rpc_argp = &arg,
91ba2eee 2726 .rpc_resp = &res,
1da177e4 2727 };
136f2627
TM		 2728 int status = -ENOMEM;
2729
2730 res.fattr = nfs_alloc_fattr();
2731 res.dir_attr = nfs_alloc_fattr();
2732 if (res.fattr == NULL || res.dir_attr == NULL)
2733 goto out;
1da177e4 2734
cccef3b9 2735 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2736 if (!status) {
2737 update_changeattr(dir, &res.cinfo);
2738 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2739 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2740 }
136f2627
TM		 2741out:
2742 nfs_free_fattr(res.dir_attr);
2743 nfs_free_fattr(res.fattr);
1da177e4
LT		 2744 return status;
2745}
2746
2747static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2748{
2749 struct nfs4_exception exception = { };
2750 int err;
2751 do {
2752 err = nfs4_handle_exception(NFS_SERVER(inode),
2753 _nfs4_proc_link(inode, dir, name),
2754 &exception);
2755 } while (exception.retry);
2756 return err;
2757}
2758
57dc9a57
TM		 2759struct nfs4_createdata {
2760 struct rpc_message msg;
2761 struct nfs4_create_arg arg;
2762 struct nfs4_create_res res;
2763 struct nfs_fh fh;
2764 struct nfs_fattr fattr;
2765 struct nfs_fattr dir_fattr;
2766};
2767
2768static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2769 struct qstr *name, struct iattr *sattr, u32 ftype)
2770{
2771 struct nfs4_createdata *data;
2772
2773 data = kzalloc(sizeof(*data), GFP_KERNEL);
2774 if (data != NULL) {
2775 struct nfs_server *server = NFS_SERVER(dir);
2776
2777 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2778 data->msg.rpc_argp = &data->arg;
2779 data->msg.rpc_resp = &data->res;
2780 data->arg.dir_fh = NFS_FH(dir);
2781 data->arg.server = server;
2782 data->arg.name = name;
2783 data->arg.attrs = sattr;
2784 data->arg.ftype = ftype;
2785 data->arg.bitmask = server->attr_bitmask;
2786 data->res.server = server;
2787 data->res.fh = &data->fh;
2788 data->res.fattr = &data->fattr;
2789 data->res.dir_fattr = &data->dir_fattr;
2790 nfs_fattr_init(data->res.fattr);
2791 nfs_fattr_init(data->res.dir_fattr);
2792 }
2793 return data;
2794}
2795
2796static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2797{
cccef3b9
AA		 2798 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2799 &data->arg, &data->res, 1);
57dc9a57
TM		 2800 if (status == 0) {
2801 update_changeattr(dir, &data->res.dir_cinfo);
2802 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2803 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2804 }
2805 return status;
2806}
2807
2808static void nfs4_free_createdata(struct nfs4_createdata *data)
2809{
2810 kfree(data);
2811}
2812
4f390c15 2813static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2814 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2815{
57dc9a57
TM		 2816 struct nfs4_createdata *data;
2817 int status = -ENAMETOOLONG;
1da177e4 2818
94a6d753 2819 if (len > NFS4_MAXPATHLEN)
57dc9a57 2820 goto out;
4f390c15 2821
57dc9a57
TM		 2822 status = -ENOMEM;
2823 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2824 if (data == NULL)
2825 goto out;
2826
2827 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2828 data->arg.u.symlink.pages = &page;
2829 data->arg.u.symlink.len = len;
1da177e4 2830
57dc9a57
TM		 2831 status = nfs4_do_create(dir, dentry, data);
2832
2833 nfs4_free_createdata(data);
2834out:
1da177e4
LT		 2835 return status;
2836}
2837
4f390c15 2838static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2839 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2840{
2841 struct nfs4_exception exception = { };
2842 int err;
2843 do {
2844 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2845 _nfs4_proc_symlink(dir, dentry, page,
2846 len, sattr),
1da177e4
LT		 2847 &exception);
2848 } while (exception.retry);
2849 return err;
2850}
2851
2852static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2853 struct iattr *sattr)
2854{
57dc9a57
TM		 2855 struct nfs4_createdata *data;
2856 int status = -ENOMEM;
1da177e4 2857
57dc9a57
TM		 2858 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2859 if (data == NULL)
2860 goto out;
2861
2862 status = nfs4_do_create(dir, dentry, data);
2863
2864 nfs4_free_createdata(data);
2865out:
1da177e4
LT		 2866 return status;
2867}
2868
2869static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2870 struct iattr *sattr)
2871{
2872 struct nfs4_exception exception = { };
2873 int err;
2874 do {
2875 err = nfs4_handle_exception(NFS_SERVER(dir),
2876 _nfs4_proc_mkdir(dir, dentry, sattr),
2877 &exception);
2878 } while (exception.retry);
2879 return err;
2880}
2881
2882static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2883 u64 cookie, struct page *page, unsigned int count, int plus)
2884{
2885 struct inode *dir = dentry->d_inode;
2886 struct nfs4_readdir_arg args = {
2887 .fh = NFS_FH(dir),
2888 .pages = &page,
2889 .pgbase = 0,
2890 .count = count,
96d25e53 2891 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2892 };
2893 struct nfs4_readdir_res res;
2894 struct rpc_message msg = {
2895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2896 .rpc_argp = &args,
2897 .rpc_resp = &res,
2898 .rpc_cred = cred,
2899 };
2900 int status;
2901
3110ff80 2902 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2903 dentry->d_parent->d_name.name,
2904 dentry->d_name.name,
2905 (unsigned long long)cookie);
1da177e4
LT		 2906 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2907 res.pgbase = args.pgbase;
cccef3b9 2908 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2909 if (status == 0)
2910 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2911
2912 nfs_invalidate_atime(dir);
2913
3110ff80 2914 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2915 return status;
2916}
2917
2918static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2919 u64 cookie, struct page *page, unsigned int count, int plus)
2920{
2921 struct nfs4_exception exception = { };
2922 int err;
2923 do {
2924 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2925 _nfs4_proc_readdir(dentry, cred, cookie,
2926 page, count, plus),
2927 &exception);
2928 } while (exception.retry);
2929 return err;
2930}
2931
2932static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2933 struct iattr *sattr, dev_t rdev)
2934{
57dc9a57
TM		 2935 struct nfs4_createdata *data;
2936 int mode = sattr->ia_mode;
2937 int status = -ENOMEM;
1da177e4
LT		 2938
2939 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2940 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2941
2942 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2943 if (data == NULL)
2944 goto out;
2945
1da177e4 2946 if (S_ISFIFO(mode))
57dc9a57 2947 data->arg.ftype = NF4FIFO;
1da177e4 2948 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2949 data->arg.ftype = NF4BLK;
2950 data->arg.u.device.specdata1 = MAJOR(rdev);
2951 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2952 }
2953 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2954 data->arg.ftype = NF4CHR;
2955 data->arg.u.device.specdata1 = MAJOR(rdev);
2956 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2957 }
1da177e4 2958
57dc9a57
TM		 2959 status = nfs4_do_create(dir, dentry, data);
2960
2961 nfs4_free_createdata(data);
2962out:
1da177e4
LT		 2963 return status;
2964}
2965
2966static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2967 struct iattr *sattr, dev_t rdev)
2968{
2969 struct nfs4_exception exception = { };
2970 int err;
2971 do {
2972 err = nfs4_handle_exception(NFS_SERVER(dir),
2973 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2974 &exception);
2975 } while (exception.retry);
2976 return err;
2977}
2978
2979static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2980 struct nfs_fsstat *fsstat)
2981{
2982 struct nfs4_statfs_arg args = {
2983 .fh = fhandle,
2984 .bitmask = server->attr_bitmask,
2985 };
24ad148a
BH		 2986 struct nfs4_statfs_res res = {
2987 .fsstat = fsstat,
2988 };
1da177e4
LT		 2989 struct rpc_message msg = {
2990 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2991 .rpc_argp = &args,
24ad148a 2992 .rpc_resp = &res,
1da177e4
LT		 2993 };
2994
0e574af1 2995 nfs_fattr_init(fsstat->fattr);
cccef3b9 2996 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2997}
2998
2999static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3000{
3001 struct nfs4_exception exception = { };
3002 int err;
3003 do {
3004 err = nfs4_handle_exception(server,
3005 _nfs4_proc_statfs(server, fhandle, fsstat),
3006 &exception);
3007 } while (exception.retry);
3008 return err;
3009}
3010
3011static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3012 struct nfs_fsinfo *fsinfo)
3013{
3014 struct nfs4_fsinfo_arg args = {
3015 .fh = fhandle,
3016 .bitmask = server->attr_bitmask,
3017 };
3dda5e43
BH		 3018 struct nfs4_fsinfo_res res = {
3019 .fsinfo = fsinfo,
3020 };
1da177e4
LT		 3021 struct rpc_message msg = {
3022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3023 .rpc_argp = &args,
3dda5e43 3024 .rpc_resp = &res,
1da177e4
LT		 3025 };
3026
cccef3b9 3027 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3028}
3029
3030static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3031{
3032 struct nfs4_exception exception = { };
3033 int err;
3034
3035 do {
3036 err = nfs4_handle_exception(server,
3037 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3038 &exception);
3039 } while (exception.retry);
3040 return err;
3041}
3042
3043static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3044{
0e574af1 3045 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3046 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3047}
3048
3049static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3050 struct nfs_pathconf *pathconf)
3051{
3052 struct nfs4_pathconf_arg args = {
3053 .fh = fhandle,
3054 .bitmask = server->attr_bitmask,
3055 };
d45b2989
BH		 3056 struct nfs4_pathconf_res res = {
3057 .pathconf = pathconf,
3058 };
1da177e4
LT		 3059 struct rpc_message msg = {
3060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3061 .rpc_argp = &args,
d45b2989 3062 .rpc_resp = &res,
1da177e4
LT		 3063 };
3064
3065 /* None of the pathconf attributes are mandatory to implement */
3066 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3067 memset(pathconf, 0, sizeof(*pathconf));
3068 return 0;
3069 }
3070
0e574af1 3071 nfs_fattr_init(pathconf->fattr);
cccef3b9 3072 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3073}
3074
3075static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3076 struct nfs_pathconf *pathconf)
3077{
3078 struct nfs4_exception exception = { };
3079 int err;
3080
3081 do {
3082 err = nfs4_handle_exception(server,
3083 _nfs4_proc_pathconf(server, fhandle, pathconf),
3084 &exception);
3085 } while (exception.retry);
3086 return err;
3087}
3088
ec06c096 3089static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3090{
ec06c096 3091 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3092
f11c88af
AA		 3093 dprintk("--> %s\n", __func__);
3094
f11c88af
AA		 3095 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3096
9e33bed5 3097 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3098 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3099 return -EAGAIN;
1da177e4 3100 }
8850df99
TM		 3101
3102 nfs_invalidate_atime(data->inode);
1da177e4 3103 if (task->tk_status > 0)
ec06c096
TM		 3104 renew_lease(server, data->timestamp);
3105 return 0;
1da177e4
LT		 3106}
3107
bdc7f021 3108static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3109{
1da177e4 3110 data->timestamp = jiffies;
bdc7f021 3111 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3112}
3113
788e7a89 3114static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3115{
1da177e4
LT		 3116 struct inode *inode = data->inode;
3117
def6ed7e
AA		 3118 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3119 task->tk_status);
3120
9e33bed5 3121 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3122 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3123 return -EAGAIN;
1da177e4 3124 }
4f9838c7 3125 if (task->tk_status >= 0) {
1da177e4 3126 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3127 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3128 }
788e7a89 3129 return 0;
1da177e4
LT		 3130}
3131
bdc7f021 3132static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3133{
bdc7f021
TM		 3134 struct nfs_server *server = NFS_SERVER(data->inode);
3135
a65318bf 3136 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3137 data->res.server = server;
1da177e4
LT		 3138 data->timestamp = jiffies;
3139
bdc7f021 3140 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3141}
3142
788e7a89 3143static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3144{
1da177e4
LT		 3145 struct inode *inode = data->inode;
3146
21d9a851
AA		 3147 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3148 task->tk_status);
9e33bed5 3149 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3150 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3151 return -EAGAIN;
1da177e4 3152 }
9e08a3c5 3153 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3154 return 0;
1da177e4
LT		 3155}
3156
bdc7f021 3157static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3158{
788e7a89 3159 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3160
a65318bf 3161 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3162 data->res.server = server;
bdc7f021 3163 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3164}
3165
9bc4e3ca
CL		 3166struct nfs4_renewdata {
3167 struct nfs_client *client;
3168 unsigned long timestamp;
3169};
3170
1da177e4
LT		 3171/*
3172 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3173 * standalone procedure for queueing an asynchronous RENEW.
3174 */
9bc4e3ca 3175static void nfs4_renew_release(void *calldata)
dc96aef9 3176{
9bc4e3ca
CL		 3177 struct nfs4_renewdata *data = calldata;
3178 struct nfs_client *clp = data->client;
dc96aef9 3179
0851de06
AB		 3180 if (atomic_read(&clp->cl_count) > 1)
3181 nfs4_schedule_state_renewal(clp);
3182 nfs_put_client(clp);
9bc4e3ca 3183 kfree(data);
dc96aef9
AB		 3184}
3185
9bc4e3ca 3186static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3187{
9bc4e3ca
CL		 3188 struct nfs4_renewdata *data = calldata;
3189 struct nfs_client *clp = data->client;
3190 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3191
3192 if (task->tk_status < 0) {
95baa25c
TM		 3193 /* Unless we're shutting down, schedule state recovery! */
3194 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3195 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3196 return;
3197 }
3198 spin_lock(&clp->cl_lock);
3199 if (time_before(clp->cl_last_renewal,timestamp))
3200 clp->cl_last_renewal = timestamp;
3201 spin_unlock(&clp->cl_lock);
3202}
3203
963d8fe5
TM		 3204static const struct rpc_call_ops nfs4_renew_ops = {
3205 .rpc_call_done = nfs4_renew_done,
dc96aef9 3206 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3207};
3208
adfa6f98 3209int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3210{
3211 struct rpc_message msg = {
3212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3213 .rpc_argp = clp,
b4454fe1 3214 .rpc_cred = cred,
1da177e4 3215 };
9bc4e3ca 3216 struct nfs4_renewdata *data;
1da177e4 3217
0851de06
AB		 3218 if (!atomic_inc_not_zero(&clp->cl_count))
3219 return -EIO;
9bc4e3ca
CL		 3220 data = kmalloc(sizeof(*data), GFP_KERNEL);
3221 if (data == NULL)
3222 return -ENOMEM;
3223 data->client = clp;
3224 data->timestamp = jiffies;
1da177e4 3225 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3226 &nfs4_renew_ops, data);
1da177e4
LT		 3227}
3228
adfa6f98 3229int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3230{
3231 struct rpc_message msg = {
3232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3233 .rpc_argp = clp,
b4454fe1 3234 .rpc_cred = cred,
1da177e4
LT		 3235 };
3236 unsigned long now = jiffies;
3237 int status;
3238
3239 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3240 if (status < 0)
3241 return status;
3242 spin_lock(&clp->cl_lock);
3243 if (time_before(clp->cl_last_renewal,now))
3244 clp->cl_last_renewal = now;
3245 spin_unlock(&clp->cl_lock);
3246 return 0;
3247}
3248
aa1870af
BF		 3249static inline int nfs4_server_supports_acls(struct nfs_server *server)
3250{
3251 return (server->caps & NFS_CAP_ACLS)
3252 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3253 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3254}
3255
3256/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3257 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3258 * the stack.
3259 */
3260#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3261
3262static void buf_to_pages(const void *buf, size_t buflen,
3263 struct page **pages, unsigned int *pgbase)
3264{
3265 const void *p = buf;
3266
3267 *pgbase = offset_in_page(buf);
3268 p -= *pgbase;
3269 while (p < buf + buflen) {
3270 *(pages++) = virt_to_page(p);
3271 p += PAGE_CACHE_SIZE;
3272 }
3273}
3274
e50a1c2e
BF		 3275struct nfs4_cached_acl {
3276 int cached;
3277 size_t len;
3e9d4154 3278 char data[0];
e50a1c2e
BF		 3279};
3280
3281static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3282{
3283 struct nfs_inode *nfsi = NFS_I(inode);
3284
3285 spin_lock(&inode->i_lock);
3286 kfree(nfsi->nfs4_acl);
3287 nfsi->nfs4_acl = acl;
3288 spin_unlock(&inode->i_lock);
3289}
3290
3291static void nfs4_zap_acl_attr(struct inode *inode)
3292{
3293 nfs4_set_cached_acl(inode, NULL);
3294}
3295
3296static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3297{
3298 struct nfs_inode *nfsi = NFS_I(inode);
3299 struct nfs4_cached_acl *acl;
3300 int ret = -ENOENT;
3301
3302 spin_lock(&inode->i_lock);
3303 acl = nfsi->nfs4_acl;
3304 if (acl == NULL)
3305 goto out;
3306 if (buf == NULL) /* user is just asking for length */
3307 goto out_len;
3308 if (acl->cached == 0)
3309 goto out;
3310 ret = -ERANGE; /* see getxattr(2) man page */
3311 if (acl->len > buflen)
3312 goto out;
3313 memcpy(buf, acl->data, acl->len);
3314out_len:
3315 ret = acl->len;
3316out:
3317 spin_unlock(&inode->i_lock);
3318 return ret;
3319}
3320
3321static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3322{
3323 struct nfs4_cached_acl *acl;
3324
3325 if (buf && acl_len <= PAGE_SIZE) {
3326 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3327 if (acl == NULL)
3328 goto out;
3329 acl->cached = 1;
3330 memcpy(acl->data, buf, acl_len);
3331 } else {
3332 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3333 if (acl == NULL)
3334 goto out;
3335 acl->cached = 0;
3336 }
3337 acl->len = acl_len;
3338out:
3339 nfs4_set_cached_acl(inode, acl);
3340}
3341
16b4289c 3342static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3343{
aa1870af
BF		 3344 struct page *pages[NFS4ACL_MAXPAGES];
3345 struct nfs_getaclargs args = {
3346 .fh = NFS_FH(inode),
3347 .acl_pages = pages,
3348 .acl_len = buflen,
3349 };
663c79b3
BH		 3350 struct nfs_getaclres res = {
3351 .acl_len = buflen,
3352 };
e50a1c2e 3353 void *resp_buf;
aa1870af
BF		 3354 struct rpc_message msg = {
3355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3356 .rpc_argp = &args,
663c79b3 3357 .rpc_resp = &res,
aa1870af 3358 };
e50a1c2e 3359 struct page *localpage = NULL;
aa1870af
BF		 3360 int ret;
3361
e50a1c2e
BF		 3362 if (buflen < PAGE_SIZE) {
3363 /* As long as we're doing a round trip to the server anyway,
3364 * let's be prepared for a page of acl data. */
3365 localpage = alloc_page(GFP_KERNEL);
3366 resp_buf = page_address(localpage);
3367 if (localpage == NULL)
3368 return -ENOMEM;
3369 args.acl_pages[0] = localpage;
3370 args.acl_pgbase = 0;
663c79b3 3371 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3372 } else {
3373 resp_buf = buf;
3374 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3375 }
cccef3b9 3376 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3377 if (ret)
3378 goto out_free;
663c79b3
BH		 3379 if (res.acl_len > args.acl_len)
3380 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3381 else
663c79b3 3382 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3383 if (buf) {
3384 ret = -ERANGE;
663c79b3 3385 if (res.acl_len > buflen)
e50a1c2e
BF		 3386 goto out_free;
3387 if (localpage)
663c79b3 3388 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3389 }
663c79b3 3390 ret = res.acl_len;
e50a1c2e
BF		 3391out_free:
3392 if (localpage)
3393 __free_page(localpage);
aa1870af
BF		 3394 return ret;
3395}
3396
16b4289c
TM		 3397static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3398{
3399 struct nfs4_exception exception = { };
3400 ssize_t ret;
3401 do {
3402 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3403 if (ret >= 0)
3404 break;
3405 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3406 } while (exception.retry);
3407 return ret;
3408}
3409
e50a1c2e
BF		 3410static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3411{
3412 struct nfs_server *server = NFS_SERVER(inode);
3413 int ret;
3414
3415 if (!nfs4_server_supports_acls(server))
3416 return -EOPNOTSUPP;
3417 ret = nfs_revalidate_inode(server, inode);
3418 if (ret < 0)
3419 return ret;
3420 ret = nfs4_read_cached_acl(inode, buf, buflen);
3421 if (ret != -ENOENT)
3422 return ret;
3423 return nfs4_get_acl_uncached(inode, buf, buflen);
3424}
3425
16b4289c 3426static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3427{
3428 struct nfs_server *server = NFS_SERVER(inode);
3429 struct page *pages[NFS4ACL_MAXPAGES];
3430 struct nfs_setaclargs arg = {
3431 .fh = NFS_FH(inode),
3432 .acl_pages = pages,
3433 .acl_len = buflen,
3434 };
73c403a9 3435 struct nfs_setaclres res;
4b580ee3
BF		 3436 struct rpc_message msg = {
3437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3438 .rpc_argp = &arg,
73c403a9 3439 .rpc_resp = &res,
4b580ee3
BF		 3440 };
3441 int ret;
3442
3443 if (!nfs4_server_supports_acls(server))
3444 return -EOPNOTSUPP;
642ac549 3445 nfs_inode_return_delegation(inode);
4b580ee3 3446 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3447 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3448 nfs_access_zap_cache(inode);
3449 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3450 return ret;
3451}
3452
16b4289c
TM		 3453static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3454{
3455 struct nfs4_exception exception = { };
3456 int err;
3457 do {
3458 err = nfs4_handle_exception(NFS_SERVER(inode),
3459 __nfs4_proc_set_acl(inode, buf, buflen),
3460 &exception);
3461 } while (exception.retry);
3462 return err;
3463}
3464
1da177e4 3465static int
aa5190d0 3466nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3467{
aa5190d0
TM		 3468 struct nfs_client *clp = server->nfs_client;
3469
3470 if (task->tk_status >= 0)
1da177e4
LT		 3471 return 0;
3472 switch(task->tk_status) {
9e33bed5
TM		 3473 case -NFS4ERR_ADMIN_REVOKED:
3474 case -NFS4ERR_BAD_STATEID:
3475 case -NFS4ERR_OPENMODE:
3476 if (state == NULL)
3477 break;
3478 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3479 goto do_state_recovery;
1da177e4 3480 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3481 if (state == NULL)
3482 break;
3483 nfs4_state_mark_reclaim_reboot(clp, state);
3484 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3485 case -NFS4ERR_EXPIRED:
a2c0b9e2 3486 goto do_state_recovery;
4745e315
AA		 3487#if defined(CONFIG_NFS_V4_1)
3488 case -NFS4ERR_BADSESSION:
3489 case -NFS4ERR_BADSLOT:
3490 case -NFS4ERR_BAD_HIGH_SLOT:
3491 case -NFS4ERR_DEADSESSION:
3492 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3493 case -NFS4ERR_SEQ_FALSE_RETRY:
3494 case -NFS4ERR_SEQ_MISORDERED:
3495 dprintk("%s ERROR %d, Reset session\n", __func__,
3496 task->tk_status);
0b9e2d41 3497 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3498 task->tk_status = 0;
3499 return -EAGAIN;
3500#endif /* CONFIG_NFS_V4_1 */
1da177e4 3501 case -NFS4ERR_DELAY:
aa5190d0 3502 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3503 case -NFS4ERR_GRACE:
2c643488 3504 case -EKEYEXPIRED:
1da177e4
LT		 3505 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3506 task->tk_status = 0;
3507 return -EAGAIN;
3508 case -NFS4ERR_OLD_STATEID:
3509 task->tk_status = 0;
3510 return -EAGAIN;
3511 }
3512 task->tk_status = nfs4_map_errors(task->tk_status);
3513 return 0;
a2c0b9e2
TM		 3514do_state_recovery:
3515 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3516 nfs4_schedule_state_recovery(clp);
3517 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3518 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3519 task->tk_status = 0;
3520 return -EAGAIN;
1da177e4
LT		 3521}
3522
bb8b27e5
TM		 3523int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3524 unsigned short port, struct rpc_cred *cred,
3525 struct nfs4_setclientid_res *res)
1da177e4
LT		 3526{
3527 nfs4_verifier sc_verifier;
3528 struct nfs4_setclientid setclientid = {
3529 .sc_verifier = &sc_verifier,
3530 .sc_prog = program,
3531 };
3532 struct rpc_message msg = {
3533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3534 .rpc_argp = &setclientid,
bb8b27e5 3535 .rpc_resp = res,
286d7d6a 3536 .rpc_cred = cred,
1da177e4 3537 };
bc4785cd 3538 __be32 *p;
1da177e4
LT		 3539 int loop = 0;
3540 int status;
3541
bc4785cd 3542 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3543 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3544 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3545
3546 for(;;) {
3547 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3548 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3549 clp->cl_ipaddr,
3550 rpc_peeraddr2str(clp->cl_rpcclient,
3551 RPC_DISPLAY_ADDR),
69dd716c
TM		 3552 rpc_peeraddr2str(clp->cl_rpcclient,
3553 RPC_DISPLAY_PROTO),
78ea323b 3554 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3555 clp->cl_id_uniquifier);
3556 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3557 sizeof(setclientid.sc_netid),
3558 rpc_peeraddr2str(clp->cl_rpcclient,
3559 RPC_DISPLAY_NETID));
1da177e4 3560 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3561 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3562 clp->cl_ipaddr, port >> 8, port & 255);
3563
3564 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3565 if (status != -NFS4ERR_CLID_INUSE)
3566 break;
3567 if (signalled())
3568 break;
3569 if (loop++ & 1)
3570 ssleep(clp->cl_lease_time + 1);
3571 else
3572 if (++clp->cl_id_uniquifier == 0)
3573 break;
3574 }
3575 return status;
3576}
3577
bb8b27e5
TM		 3578static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3579 struct nfs4_setclientid_res *arg,
3580 struct rpc_cred *cred)
1da177e4
LT		 3581{
3582 struct nfs_fsinfo fsinfo;
3583 struct rpc_message msg = {
3584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3585 .rpc_argp = arg,
1da177e4 3586 .rpc_resp = &fsinfo,
286d7d6a 3587 .rpc_cred = cred,
1da177e4
LT		 3588 };
3589 unsigned long now;
3590 int status;
3591
3592 now = jiffies;
3593 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3594 if (status == 0) {
3595 spin_lock(&clp->cl_lock);
3596 clp->cl_lease_time = fsinfo.lease_time * HZ;
3597 clp->cl_last_renewal = now;
3598 spin_unlock(&clp->cl_lock);
3599 }
3600 return status;
3601}
3602
bb8b27e5
TM		 3603int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3604 struct nfs4_setclientid_res *arg,
3605 struct rpc_cred *cred)
51581f3b 3606{
77e03677 3607 long timeout = 0;
51581f3b
TM		 3608 int err;
3609 do {
bb8b27e5 3610 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3611 switch (err) {
3612 case 0:
3613 return err;
3614 case -NFS4ERR_RESOURCE:
3615 /* The IBM lawyers misread another document! */
3616 case -NFS4ERR_DELAY:
2c643488 3617 case -EKEYEXPIRED:
51581f3b
TM		 3618 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3619 }
3620 } while (err == 0);
3621 return err;
3622}
3623
fe650407
TM		 3624struct nfs4_delegreturndata {
3625 struct nfs4_delegreturnargs args;
fa178f29 3626 struct nfs4_delegreturnres res;
fe650407
TM		 3627 struct nfs_fh fh;
3628 nfs4_stateid stateid;
26e976a8 3629 unsigned long timestamp;
fa178f29 3630 struct nfs_fattr fattr;
fe650407
TM		 3631 int rpc_status;
3632};
3633
fe650407
TM		 3634static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3635{
3636 struct nfs4_delegreturndata *data = calldata;
938e1010 3637
d61e612a
TM		 3638 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3639 task->tk_status);
938e1010 3640
79708861
RL		 3641 switch (task->tk_status) {
3642 case -NFS4ERR_STALE_STATEID:
3643 case -NFS4ERR_EXPIRED:
3644 case 0:
fa178f29 3645 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3646 break;
3647 default:
3648 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3649 -EAGAIN) {
3650 nfs_restart_rpc(task, data->res.server->nfs_client);
3651 return;
3652 }
3653 }
3654 data->rpc_status = task->tk_status;
fe650407
TM		 3655}
3656
3657static void nfs4_delegreturn_release(void *calldata)
3658{
fe650407
TM		 3659 kfree(calldata);
3660}
3661
938e1010
AA		 3662#if defined(CONFIG_NFS_V4_1)
3663static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3664{
3665 struct nfs4_delegreturndata *d_data;
3666
3667 d_data = (struct nfs4_delegreturndata *)data;
3668
035168ab 3669 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3670 &d_data->args.seq_args,
3671 &d_data->res.seq_res, 1, task))
3672 return;
3673 rpc_call_start(task);
3674}
3675#endif /* CONFIG_NFS_V4_1 */
3676
c8d149f3 3677static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3678#if defined(CONFIG_NFS_V4_1)
3679 .rpc_call_prepare = nfs4_delegreturn_prepare,
3680#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3681 .rpc_call_done = nfs4_delegreturn_done,
3682 .rpc_release = nfs4_delegreturn_release,
3683};
3684
e6f81075 3685static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3686{
3687 struct nfs4_delegreturndata *data;
fa178f29 3688 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3689 struct rpc_task *task;
5138fde0
TM		 3690 struct rpc_message msg = {
3691 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3692 .rpc_cred = cred,
3693 };
c970aa85
TM		 3694 struct rpc_task_setup task_setup_data = {
3695 .rpc_client = server->client,
5138fde0 3696 .rpc_message = &msg,
c970aa85
TM		 3697 .callback_ops = &nfs4_delegreturn_ops,
3698 .flags = RPC_TASK_ASYNC,
3699 };
e6f81075 3700 int status = 0;
fe650407 3701
8535b2be 3702 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3703 if (data == NULL)
3704 return -ENOMEM;
3705 data->args.fhandle = &data->fh;
3706 data->args.stateid = &data->stateid;
fa178f29 3707 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3708 nfs_copy_fh(&data->fh, NFS_FH(inode));
3709 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3710 data->res.fattr = &data->fattr;
3711 data->res.server = server;
5f7dbd5c 3712 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3713 nfs_fattr_init(data->res.fattr);
26e976a8 3714 data->timestamp = jiffies;
fe650407
TM		 3715 data->rpc_status = 0;
3716
c970aa85 3717 task_setup_data.callback_data = data;
5138fde0
TM		 3718 msg.rpc_argp = &data->args,
3719 msg.rpc_resp = &data->res,
c970aa85 3720 task = rpc_run_task(&task_setup_data);
7a1218a2 3721 if (IS_ERR(task))
fe650407 3722 return PTR_ERR(task);
e6f81075
TM		 3723 if (!issync)
3724 goto out;
fe650407 3725 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3726 if (status != 0)
3727 goto out;
3728 status = data->rpc_status;
3729 if (status != 0)
3730 goto out;
3731 nfs_refresh_inode(inode, &data->fattr);
3732out:
e6b3c4db 3733 rpc_put_task(task);
fe650407 3734 return status;
1da177e4
LT		 3735}
3736
e6f81075 3737int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3738{
3739 struct nfs_server *server = NFS_SERVER(inode);
3740 struct nfs4_exception exception = { };
3741 int err;
3742 do {
e6f81075 3743 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3744 switch (err) {
3745 case -NFS4ERR_STALE_STATEID:
3746 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3747 case 0:
3748 return 0;
3749 }
3750 err = nfs4_handle_exception(server, err, &exception);
3751 } while (exception.retry);
3752 return err;
3753}
3754
3755#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3756#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3757
3758/*
3759 * sleep, with exponential backoff, and retry the LOCK operation.
3760 */
3761static unsigned long
3762nfs4_set_lock_task_retry(unsigned long timeout)
3763{
150030b7 3764 schedule_timeout_killable(timeout);
1da177e4
LT		 3765 timeout <<= 1;
3766 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3767 return NFS4_LOCK_MAXTIMEOUT;
3768 return timeout;
3769}
3770
1da177e4
LT		 3771static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3772{
3773 struct inode *inode = state->inode;
3774 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3775 struct nfs_client *clp = server->nfs_client;
911d1aaf 3776 struct nfs_lockt_args arg = {
1da177e4 3777 .fh = NFS_FH(inode),
911d1aaf 3778 .fl = request,
1da177e4 3779 };
911d1aaf
TM		 3780 struct nfs_lockt_res res = {
3781 .denied = request,
1da177e4
LT		 3782 };
3783 struct rpc_message msg = {
3784 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3785 .rpc_argp = &arg,
3786 .rpc_resp = &res,
3787 .rpc_cred = state->owner->so_cred,
3788 };
1da177e4
LT		 3789 struct nfs4_lock_state *lsp;
3790 int status;
3791
911d1aaf 3792 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3793 status = nfs4_set_lock_state(state, request);
3794 if (status != 0)
3795 goto out;
3796 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3797 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3798 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3799 switch (status) {
3800 case 0:
3801 request->fl_type = F_UNLCK;
3802 break;
3803 case -NFS4ERR_DENIED:
3804 status = 0;
1da177e4 3805 }
70cc6487 3806 request->fl_ops->fl_release_private(request);
8d0a8a9d 3807out:
1da177e4
LT		 3808 return status;
3809}
3810
3811static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3812{
3813 struct nfs4_exception exception = { };
3814 int err;
3815
3816 do {
3817 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3818 _nfs4_proc_getlk(state, cmd, request),
3819 &exception);
3820 } while (exception.retry);
3821 return err;
3822}
3823
3824static int do_vfs_lock(struct file *file, struct file_lock *fl)
3825{
3826 int res = 0;
3827 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3828 case FL_POSIX:
3829 res = posix_lock_file_wait(file, fl);
3830 break;
3831 case FL_FLOCK:
3832 res = flock_lock_file_wait(file, fl);
3833 break;
3834 default:
3835 BUG();
3836 }
1da177e4
LT		 3837 return res;
3838}
3839
faf5f49c 3840struct nfs4_unlockdata {
911d1aaf
TM		 3841 struct nfs_locku_args arg;
3842 struct nfs_locku_res res;
faf5f49c
TM		 3843 struct nfs4_lock_state *lsp;
3844 struct nfs_open_context *ctx;
911d1aaf
TM		 3845 struct file_lock fl;
3846 const struct nfs_server *server;
26e976a8 3847 unsigned long timestamp;
faf5f49c
TM		 3848};
3849
911d1aaf
TM		 3850static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3851 struct nfs_open_context *ctx,
3852 struct nfs4_lock_state *lsp,
3853 struct nfs_seqid *seqid)
3854{
3855 struct nfs4_unlockdata *p;
3856 struct inode *inode = lsp->ls_state->inode;
3857
8535b2be 3858 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3859 if (p == NULL)
3860 return NULL;
3861 p->arg.fh = NFS_FH(inode);
3862 p->arg.fl = &p->fl;
3863 p->arg.seqid = seqid;
c1d51931 3864 p->res.seqid = seqid;
5f7dbd5c 3865 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3866 p->arg.stateid = &lsp->ls_stateid;
3867 p->lsp = lsp;
3868 atomic_inc(&lsp->ls_count);
3869 /* Ensure we don't close file until we're done freeing locks! */
3870 p->ctx = get_nfs_open_context(ctx);
3871 memcpy(&p->fl, fl, sizeof(p->fl));
3872 p->server = NFS_SERVER(inode);
3873 return p;
3874}
3875
06f814a3 3876static void nfs4_locku_release_calldata(void *data)
faf5f49c 3877{
963d8fe5 3878 struct nfs4_unlockdata *calldata = data;
911d1aaf 3879 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3880 nfs4_put_lock_state(calldata->lsp);
3881 put_nfs_open_context(calldata->ctx);
3882 kfree(calldata);
faf5f49c
TM		 3883}
3884
963d8fe5 3885static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3886{
963d8fe5 3887 struct nfs4_unlockdata *calldata = data;
faf5f49c 3888
a893693c
AA		 3889 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3890 task->tk_status);
06f814a3
TM		 3891 if (RPC_ASSASSINATED(task))
3892 return;
faf5f49c
TM		 3893 switch (task->tk_status) {
3894 case 0:
3895 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3896 calldata->res.stateid.data,
faf5f49c 3897 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3898 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3899 break;
9e33bed5
TM		 3900 case -NFS4ERR_BAD_STATEID:
3901 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3902 case -NFS4ERR_STALE_STATEID:
3903 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3904 break;
3905 default:
9e33bed5 3906 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3907 nfs_restart_rpc(task,
d61e612a 3908 calldata->server->nfs_client);
faf5f49c 3909 }
faf5f49c
TM		 3910}
3911
4ce70ada 3912static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3913{
4ce70ada 3914 struct nfs4_unlockdata *calldata = data;
faf5f49c 3915
911d1aaf 3916 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3917 return;
3918 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3919 /* Note: exit _without_ running nfs4_locku_done */
3920 task->tk_action = NULL;
faf5f49c
TM		 3921 return;
3922 }
26e976a8 3923 calldata->timestamp = jiffies;
035168ab 3924 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3925 &calldata->arg.seq_args,
3926 &calldata->res.seq_res, 1, task))
3927 return;
5138fde0 3928 rpc_call_start(task);
faf5f49c
TM		 3929}
3930
963d8fe5 3931static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3932 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3933 .rpc_call_done = nfs4_locku_done,
06f814a3 3934 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3935};
3936
a5d16a4d
TM		 3937static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3938 struct nfs_open_context *ctx,
3939 struct nfs4_lock_state *lsp,
3940 struct nfs_seqid *seqid)
3941{
3942 struct nfs4_unlockdata *data;
5138fde0
TM		 3943 struct rpc_message msg = {
3944 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3945 .rpc_cred = ctx->cred,
3946 };
c970aa85
TM		 3947 struct rpc_task_setup task_setup_data = {
3948 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3949 .rpc_message = &msg,
c970aa85 3950 .callback_ops = &nfs4_locku_ops,
101070ca 3951 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3952 .flags = RPC_TASK_ASYNC,
3953 };
a5d16a4d 3954
137d6aca
FF		 3955 /* Ensure this is an unlock - when canceling a lock, the
3956 * canceled lock is passed in, and it won't be an unlock.
3957 */
3958 fl->fl_type = F_UNLCK;
3959
a5d16a4d
TM		 3960 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3961 if (data == NULL) {
3962 nfs_free_seqid(seqid);
3963 return ERR_PTR(-ENOMEM);
3964 }
3965
5138fde0
TM		 3966 msg.rpc_argp = &data->arg,
3967 msg.rpc_resp = &data->res,
c970aa85
TM		 3968 task_setup_data.callback_data = data;
3969 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3970}
3971
faf5f49c
TM		 3972static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3973{
19e03c57 3974 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3975 struct nfs_seqid *seqid;
1da177e4 3976 struct nfs4_lock_state *lsp;
06f814a3
TM		 3977 struct rpc_task *task;
3978 int status = 0;
536ff0f8 3979 unsigned char fl_flags = request->fl_flags;
faf5f49c 3980
8d0a8a9d 3981 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3982 /* Unlock _before_ we do the RPC call */
3983 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3984 down_read(&nfsi->rwsem);
3985 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3986 up_read(&nfsi->rwsem);
9b073574 3987 goto out;
19e03c57
TM		 3988 }
3989 up_read(&nfsi->rwsem);
8d0a8a9d 3990 if (status != 0)
9b073574
TM		 3991 goto out;
3992 /* Is this a delegated lock? */
3993 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3994 goto out;
8d0a8a9d 3995 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 3996 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 3997 status = -ENOMEM;
911d1aaf 3998 if (seqid == NULL)
9b073574 3999 goto out;
cd3758e3 4000 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4001 status = PTR_ERR(task);
4002 if (IS_ERR(task))
9b073574 4003 goto out;
a5d16a4d 4004 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4005 rpc_put_task(task);
9b073574 4006out:
536ff0f8 4007 request->fl_flags = fl_flags;
1da177e4
LT		 4008 return status;
4009}
4010
a5d16a4d
TM		 4011struct nfs4_lockdata {
4012 struct nfs_lock_args arg;
4013 struct nfs_lock_res res;
4014 struct nfs4_lock_state *lsp;
4015 struct nfs_open_context *ctx;
4016 struct file_lock fl;
26e976a8 4017 unsigned long timestamp;
a5d16a4d
TM		 4018 int rpc_status;
4019 int cancelled;
66179efe 4020 struct nfs_server *server;
a5d16a4d
TM		 4021};
4022
4023static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4024 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4025 gfp_t gfp_mask)
1da177e4 4026{
a5d16a4d
TM		 4027 struct nfs4_lockdata *p;
4028 struct inode *inode = lsp->ls_state->inode;
1da177e4 4029 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4030
8535b2be 4031 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4032 if (p == NULL)
4033 return NULL;
4034
4035 p->arg.fh = NFS_FH(inode);
4036 p->arg.fl = &p->fl;
8535b2be 4037 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4038 if (p->arg.open_seqid == NULL)
4039 goto out_free;
8535b2be 4040 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4041 if (p->arg.lock_seqid == NULL)
2f74c0a0 4042 goto out_free_seqid;
a5d16a4d 4043 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4044 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4045 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 4046 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 4047 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 4048 p->lsp = lsp;
66179efe 4049 p->server = server;
a5d16a4d
TM		 4050 atomic_inc(&lsp->ls_count);
4051 p->ctx = get_nfs_open_context(ctx);
4052 memcpy(&p->fl, fl, sizeof(p->fl));
4053 return p;
2f74c0a0
TM		 4054out_free_seqid:
4055 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4056out_free:
4057 kfree(p);
4058 return NULL;
4059}
4060
4061static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4062{
4063 struct nfs4_lockdata *data = calldata;
4064 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4065
3110ff80 4066 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4067 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4068 return;
a5d16a4d
TM		 4069 /* Do we need to do an open_to_lock_owner? */
4070 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4071 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4072 return;
a5d16a4d
TM		 4073 data->arg.open_stateid = &state->stateid;
4074 data->arg.new_lock_owner = 1;
c1d51931 4075 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4076 } else
4077 data->arg.new_lock_owner = 0;
26e976a8 4078 data->timestamp = jiffies;
035168ab
TM		 4079 if (nfs4_setup_sequence(data->server,
4080 &data->arg.seq_args,
66179efe
AA		 4081 &data->res.seq_res, 1, task))
4082 return;
5138fde0 4083 rpc_call_start(task);
3110ff80 4084 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4085}
4086
b257957e
AB		 4087static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4088{
4089 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4090 nfs4_lock_prepare(task, calldata);
4091}
4092
a5d16a4d
TM		 4093static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4094{
4095 struct nfs4_lockdata *data = calldata;
4096
3110ff80 4097 dprintk("%s: begin!\n", __func__);
a5d16a4d 4098
d61e612a
TM		 4099 nfs4_sequence_done(data->server, &data->res.seq_res,
4100 task->tk_status);
66179efe 4101
a5d16a4d
TM		 4102 data->rpc_status = task->tk_status;
4103 if (RPC_ASSASSINATED(task))
4104 goto out;
4105 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4106 if (data->rpc_status == 0)
4107 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4108 else
4109 goto out;
4110 }
4111 if (data->rpc_status == 0) {
4112 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4113 sizeof(data->lsp->ls_stateid.data));
4114 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4115 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4116 }
a5d16a4d 4117out:
3110ff80 4118 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4119}
4120
4121static void nfs4_lock_release(void *calldata)
4122{
4123 struct nfs4_lockdata *data = calldata;
4124
3110ff80 4125 dprintk("%s: begin!\n", __func__);
2f74c0a0 4126 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4127 if (data->cancelled != 0) {
4128 struct rpc_task *task;
4129 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4130 data->arg.lock_seqid);
4131 if (!IS_ERR(task))
e6b3c4db 4132 rpc_put_task(task);
3110ff80 4133 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4134 } else
4135 nfs_free_seqid(data->arg.lock_seqid);
4136 nfs4_put_lock_state(data->lsp);
4137 put_nfs_open_context(data->ctx);
4138 kfree(data);
3110ff80 4139 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4140}
4141
4142static const struct rpc_call_ops nfs4_lock_ops = {
4143 .rpc_call_prepare = nfs4_lock_prepare,
4144 .rpc_call_done = nfs4_lock_done,
4145 .rpc_release = nfs4_lock_release,
4146};
4147
b257957e
AB		 4148static const struct rpc_call_ops nfs4_recover_lock_ops = {
4149 .rpc_call_prepare = nfs4_recover_lock_prepare,
4150 .rpc_call_done = nfs4_lock_done,
4151 .rpc_release = nfs4_lock_release,
4152};
4153
2bee72a6
TM		 4154static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4155{
4156 struct nfs_client *clp = server->nfs_client;
4157 struct nfs4_state *state = lsp->ls_state;
4158
4159 switch (error) {
4160 case -NFS4ERR_ADMIN_REVOKED:
4161 case -NFS4ERR_BAD_STATEID:
4162 case -NFS4ERR_EXPIRED:
4163 if (new_lock_owner != 0 ||
4164 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4165 nfs4_state_mark_reclaim_nograce(clp, state);
4166 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4167 break;
4168 case -NFS4ERR_STALE_STATEID:
4169 if (new_lock_owner != 0 ||
4170 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4171 nfs4_state_mark_reclaim_reboot(clp, state);
4172 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4173 };
4174}
4175
afe6c27c 4176static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4177{
4178 struct nfs4_lockdata *data;
4179 struct rpc_task *task;
5138fde0
TM		 4180 struct rpc_message msg = {
4181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4182 .rpc_cred = state->owner->so_cred,
4183 };
c970aa85
TM		 4184 struct rpc_task_setup task_setup_data = {
4185 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4186 .rpc_message = &msg,
c970aa85 4187 .callback_ops = &nfs4_lock_ops,
101070ca 4188 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4189 .flags = RPC_TASK_ASYNC,
4190 };
a5d16a4d
TM		 4191 int ret;
4192
3110ff80 4193 dprintk("%s: begin!\n", __func__);
cd3758e3 4194 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4195 fl->fl_u.nfs4_fl.owner,
4196 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4197 if (data == NULL)
4198 return -ENOMEM;
4199 if (IS_SETLKW(cmd))
4200 data->arg.block = 1;
b257957e
AB		 4201 if (recovery_type > NFS_LOCK_NEW) {
4202 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4203 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4204 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4205 }
5138fde0
TM		 4206 msg.rpc_argp = &data->arg,
4207 msg.rpc_resp = &data->res,
c970aa85
TM		 4208 task_setup_data.callback_data = data;
4209 task = rpc_run_task(&task_setup_data);
7a1218a2 4210 if (IS_ERR(task))
a5d16a4d 4211 return PTR_ERR(task);
a5d16a4d
TM		 4212 ret = nfs4_wait_for_completion_rpc_task(task);
4213 if (ret == 0) {
4214 ret = data->rpc_status;
2bee72a6
TM		 4215 if (ret)
4216 nfs4_handle_setlk_error(data->server, data->lsp,
4217 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4218 } else
4219 data->cancelled = 1;
e6b3c4db 4220 rpc_put_task(task);
3110ff80 4221 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4222 return ret;
1da177e4
LT		 4223}
4224
4225static int nfs4_lock_reclaim(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
4231 do {
42a2d13e
TM		 4232 /* Cache the lock if possible... */
4233 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4234 return 0;
afe6c27c 4235 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4236 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4237 break;
4238 nfs4_handle_exception(server, err, &exception);
4239 } while (exception.retry);
4240 return err;
1da177e4
LT		 4241}
4242
4243static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4244{
202b50dc
TM		 4245 struct nfs_server *server = NFS_SERVER(state->inode);
4246 struct nfs4_exception exception = { };
4247 int err;
4248
6bfc93ef
TM		 4249 err = nfs4_set_lock_state(state, request);
4250 if (err != 0)
4251 return err;
202b50dc 4252 do {
42a2d13e
TM		 4253 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4254 return 0;
afe6c27c 4255 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4256 switch (err) {
4257 default:
4258 goto out;
4259 case -NFS4ERR_GRACE:
4260 case -NFS4ERR_DELAY:
2c643488 4261 case -EKEYEXPIRED:
a9ed2e25
TM		 4262 nfs4_handle_exception(server, err, &exception);
4263 err = 0;
4264 }
202b50dc 4265 } while (exception.retry);
a9ed2e25 4266out:
202b50dc 4267 return err;
1da177e4
LT		 4268}
4269
4270static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4271{
19e03c57 4272 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4273 unsigned char fl_flags = request->fl_flags;
8e469ebd 4274 int status = -ENOLCK;
1da177e4 4275
8e469ebd
TM		 4276 if ((fl_flags & FL_POSIX) &&
4277 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4278 goto out;
6bfc93ef 4279 /* Is this a delegated open? */
6bfc93ef
TM		 4280 status = nfs4_set_lock_state(state, request);
4281 if (status != 0)
4282 goto out;
01c3b861
TM		 4283 request->fl_flags |= FL_ACCESS;
4284 status = do_vfs_lock(request->fl_file, request);
4285 if (status < 0)
4286 goto out;
19e03c57 4287 down_read(&nfsi->rwsem);
01c3b861 4288 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4289 /* Yes: cache locks! */
01c3b861 4290 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4291 request->fl_flags = fl_flags & ~FL_SLEEP;
4292 status = do_vfs_lock(request->fl_file, request);
4293 goto out_unlock;
01c3b861 4294 }
afe6c27c 4295 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4296 if (status != 0)
01c3b861 4297 goto out_unlock;
6bfc93ef 4298 /* Note: we always want to sleep here! */
01c3b861 4299 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4300 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4301 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4302out_unlock:
19e03c57 4303 up_read(&nfsi->rwsem);
01c3b861
TM		 4304out:
4305 request->fl_flags = fl_flags;
1da177e4
LT		 4306 return status;
4307}
4308
4309static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4310{
4311 struct nfs4_exception exception = { };
4312 int err;
4313
4314 do {
965b5d67
TM		 4315 err = _nfs4_proc_setlk(state, cmd, request);
4316 if (err == -NFS4ERR_DENIED)
4317 err = -EAGAIN;
1da177e4 4318 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4319 err, &exception);
1da177e4
LT		 4320 } while (exception.retry);
4321 return err;
4322}
4323
4324static int
4325nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4326{
4327 struct nfs_open_context *ctx;
4328 struct nfs4_state *state;
4329 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4330 int status;
4331
4332 /* verify open state */
cd3758e3 4333 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4334 state = ctx->state;
4335
4336 if (request->fl_start < 0 || request->fl_end < 0)
4337 return -EINVAL;
4338
d953126a
TM		 4339 if (IS_GETLK(cmd)) {
4340 if (state != NULL)
4341 return nfs4_proc_getlk(state, F_GETLK, request);
4342 return 0;
4343 }
1da177e4
LT		 4344
4345 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4346 return -EINVAL;
4347
d953126a
TM		 4348 if (request->fl_type == F_UNLCK) {
4349 if (state != NULL)
4350 return nfs4_proc_unlck(state, cmd, request);
4351 return 0;
4352 }
1da177e4 4353
d953126a
TM		 4354 if (state == NULL)
4355 return -ENOLCK;
1da177e4
LT		 4356 do {
4357 status = nfs4_proc_setlk(state, cmd, request);
4358 if ((status != -EAGAIN) || IS_SETLK(cmd))
4359 break;
4360 timeout = nfs4_set_lock_task_retry(timeout);
4361 status = -ERESTARTSYS;
4362 if (signalled())
4363 break;
4364 } while(status < 0);
1da177e4
LT		 4365 return status;
4366}
4367
888e694c
TM		 4368int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4369{
4370 struct nfs_server *server = NFS_SERVER(state->inode);
4371 struct nfs4_exception exception = { };
4372 int err;
4373
4374 err = nfs4_set_lock_state(state, fl);
4375 if (err != 0)
4376 goto out;
4377 do {
afe6c27c 4378 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4379 switch (err) {
4380 default:
4381 printk(KERN_ERR "%s: unhandled error %d.\n",
4382 __func__, err);
4383 case 0:
965b5d67 4384 case -ESTALE:
d5122201
TM		 4385 goto out;
4386 case -NFS4ERR_EXPIRED:
4387 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4388 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4389 case -NFS4ERR_BADSESSION:
4390 case -NFS4ERR_BADSLOT:
4391 case -NFS4ERR_BAD_HIGH_SLOT:
4392 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4393 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4394 nfs4_schedule_state_recovery(server->nfs_client);
4395 goto out;
965b5d67
TM		 4396 case -ERESTARTSYS:
4397 /*
4398 * The show must go on: exit, but mark the
4399 * stateid as needing recovery.
4400 */
4401 case -NFS4ERR_ADMIN_REVOKED:
4402 case -NFS4ERR_BAD_STATEID:
4403 case -NFS4ERR_OPENMODE:
4404 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4405 err = 0;
4406 goto out;
4407 case -ENOMEM:
4408 case -NFS4ERR_DENIED:
4409 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4410 err = 0;
4411 goto out;
d5122201 4412 case -NFS4ERR_DELAY:
2c643488 4413 case -EKEYEXPIRED:
d5122201
TM		 4414 break;
4415 }
888e694c
TM		 4416 err = nfs4_handle_exception(server, err, &exception);
4417 } while (exception.retry);
4418out:
4419 return err;
4420}
6b3b5496 4421
aa1870af
BF		 4422#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4423
6b3b5496
BF		 4424int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4425 size_t buflen, int flags)
4426{
4b580ee3
BF		 4427 struct inode *inode = dentry->d_inode;
4428
4429 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4430 return -EOPNOTSUPP;
4431
4b580ee3 4432 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4433}
4434
4435/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4436 * and that's what we'll do for e.g. user attributes that haven't been set.
4437 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4438 * attributes in kernel-managed attribute namespaces. */
4439ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4440 size_t buflen)
4441{
aa1870af
BF		 4442 struct inode *inode = dentry->d_inode;
4443
4444 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4445 return -EOPNOTSUPP;
4446
4447 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4448}
4449
4450ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4451{
aa1870af 4452 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4453
096455a2
BF		 4454 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4455 return 0;
6b3b5496
BF		 4456 if (buf && buflen < len)
4457 return -ERANGE;
4458 if (buf)
aa1870af
BF		 4459 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4460 return len;
6b3b5496
BF		 4461}
4462
69aaaae1
TM		 4463static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4464{
4465 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4466 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4467 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4468 return;
4469
4470 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4471 NFS_ATTR_FATTR_NLINK;
4472 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4473 fattr->nlink = 2;
4474}
4475
56659e99 4476int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4477 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4478{
4479 struct nfs_server *server = NFS_SERVER(dir);
4480 u32 bitmask[2] = {
361e624f
MN		 4481 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4482 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4483 };
4484 struct nfs4_fs_locations_arg args = {
4485 .dir_fh = NFS_FH(dir),
c228fd3a 4486 .name = name,
683b57b4
TM		 4487 .page = page,
4488 .bitmask = bitmask,
4489 };
22958463
BH		 4490 struct nfs4_fs_locations_res res = {
4491 .fs_locations = fs_locations,
4492 };
683b57b4
TM		 4493 struct rpc_message msg = {
4494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4495 .rpc_argp = &args,
22958463 4496 .rpc_resp = &res,
683b57b4
TM		 4497 };
4498 int status;
4499
3110ff80 4500 dprintk("%s: start\n", __func__);
c228fd3a 4501 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4502 fs_locations->server = server;
830b8e33 4503 fs_locations->nlocations = 0;
cccef3b9 4504 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4505 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4506 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4507 return status;
4508}
4509
557134a3 4510#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4511/*
4512 * nfs4_proc_exchange_id()
4513 *
4514 * Since the clientid has expired, all compounds using sessions
4515 * associated with the stale clientid will be returning
4516 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4517 * be in some phase of session reset.
4518 */
4d643d1d 4519int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4520{
4521 nfs4_verifier verifier;
4522 struct nfs41_exchange_id_args args = {
4523 .client = clp,
4524 .flags = clp->cl_exchange_flags,
4525 };
4526 struct nfs41_exchange_id_res res = {
4527 .client = clp,
4528 };
4529 int status;
4530 struct rpc_message msg = {
4531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4532 .rpc_argp = &args,
4533 .rpc_resp = &res,
4534 .rpc_cred = cred,
4535 };
4536 __be32 *p;
4537
4538 dprintk("--> %s\n", __func__);
4539 BUG_ON(clp == NULL);
a7b72103 4540
7b183d0d
AB		 4541 /* Remove server-only flags */
4542 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4543
99fe60d0
BH		 4544 p = (u32 *)verifier.data;
4545 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4546 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4547 args.verifier = &verifier;
4548
4549 while (1) {
4550 args.id_len = scnprintf(args.id, sizeof(args.id),
4551 "%s/%s %u",
4552 clp->cl_ipaddr,
4553 rpc_peeraddr2str(clp->cl_rpcclient,
4554 RPC_DISPLAY_ADDR),
4555 clp->cl_id_uniquifier);
4556
4557 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4558
180b62a3 4559 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4560 break;
4561
4562 if (signalled())
4563 break;
4564
4565 if (++clp->cl_id_uniquifier == 0)
4566 break;
4567 }
4568
4569 dprintk("<-- %s status= %d\n", __func__, status);
4570 return status;
4571}
4572
2050f0cc
AA		 4573struct nfs4_get_lease_time_data {
4574 struct nfs4_get_lease_time_args *args;
4575 struct nfs4_get_lease_time_res *res;
4576 struct nfs_client *clp;
4577};
4578
4579static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4580 void *calldata)
4581{
4582 int ret;
4583 struct nfs4_get_lease_time_data *data =
4584 (struct nfs4_get_lease_time_data *)calldata;
4585
4586 dprintk("--> %s\n", __func__);
689cf5c1 4587 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4588 /* just setup sequence, do not trigger session recovery
4589 since we're invoked within one */
4590 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4591 &data->args->la_seq_args,
4592 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4593
4594 BUG_ON(ret == -EAGAIN);
4595 rpc_call_start(task);
4596 dprintk("<-- %s\n", __func__);
4597}
4598
4599/*
4600 * Called from nfs4_state_manager thread for session setup, so don't recover
4601 * from sequence operation or clientid errors.
4602 */
4603static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4604{
4605 struct nfs4_get_lease_time_data *data =
4606 (struct nfs4_get_lease_time_data *)calldata;
4607
4608 dprintk("--> %s\n", __func__);
d185a334 4609 nfs41_sequence_done(&data->res->lr_seq_res);
2050f0cc
AA		 4610 switch (task->tk_status) {
4611 case -NFS4ERR_DELAY:
4612 case -NFS4ERR_GRACE:
2c643488 4613 case -EKEYEXPIRED:
2050f0cc
AA		 4614 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4615 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4616 task->tk_status = 0;
0110ee15 4617 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4618 return;
4619 }
2050f0cc
AA		 4620 dprintk("<-- %s\n", __func__);
4621}
4622
4623struct rpc_call_ops nfs4_get_lease_time_ops = {
4624 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4625 .rpc_call_done = nfs4_get_lease_time_done,
4626};
4627
4628int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4629{
4630 struct rpc_task *task;
4631 struct nfs4_get_lease_time_args args;
4632 struct nfs4_get_lease_time_res res = {
4633 .lr_fsinfo = fsinfo,
4634 };
4635 struct nfs4_get_lease_time_data data = {
4636 .args = &args,
4637 .res = &res,
4638 .clp = clp,
4639 };
4640 struct rpc_message msg = {
4641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4642 .rpc_argp = &args,
4643 .rpc_resp = &res,
4644 };
4645 struct rpc_task_setup task_setup = {
4646 .rpc_client = clp->cl_rpcclient,
4647 .rpc_message = &msg,
4648 .callback_ops = &nfs4_get_lease_time_ops,
4649 .callback_data = &data
4650 };
4651 int status;
4652
4653 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4654 dprintk("--> %s\n", __func__);
4655 task = rpc_run_task(&task_setup);
4656
4657 if (IS_ERR(task))
4658 status = PTR_ERR(task);
4659 else {
4660 status = task->tk_status;
4661 rpc_put_task(task);
4662 }
4663 dprintk("<-- %s return %d\n", __func__, status);
4664
4665 return status;
4666}
4667
b73dafa7
RL		 4668/*
4669 * Reset a slot table
4670 */
104aeba4
AA		 4671static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4672 int ivalue)
ac72b7b3 4673{
104aeba4 4674 struct nfs4_slot *new = NULL;
b73dafa7 4675 int i;
ac72b7b3
AA		 4676 int ret = 0;
4677
104aeba4
AA		 4678 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4679 max_reqs, tbl->max_slots);
ac72b7b3 4680
104aeba4
AA		 4681 /* Does the newly negotiated max_reqs match the existing slot table? */
4682 if (max_reqs != tbl->max_slots) {
4683 ret = -ENOMEM;
4684 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4685 GFP_NOFS);
104aeba4
AA		 4686 if (!new)
4687 goto out;
4688 ret = 0;
4689 kfree(tbl->slots);
ac72b7b3
AA		 4690 }
4691 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4692 if (new) {
4693 tbl->slots = new;
4694 tbl->max_slots = max_reqs;
4695 }
4696 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4697 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4698 spin_unlock(&tbl->slot_tbl_lock);
4699 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4700 tbl, tbl->slots, tbl->max_slots);
4701out:
4702 dprintk("<-- %s: return %d\n", __func__, ret);
4703 return ret;
4704}
4705
b73dafa7
RL		 4706/*
4707 * Reset the forechannel and backchannel slot tables
4708 */
4709static int nfs4_reset_slot_tables(struct nfs4_session *session)
4710{
4711 int status;
4712
4713 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4714 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4715 if (status)
4716 return status;
4717
4718 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4719 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4720 return status;
4721}
4722
f8625a6a
RL		 4723/* Destroy the slot table */
4724static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4725{
4726 if (session->fc_slot_table.slots != NULL) {
4727 kfree(session->fc_slot_table.slots);
4728 session->fc_slot_table.slots = NULL;
4729 }
4730 if (session->bc_slot_table.slots != NULL) {
4731 kfree(session->bc_slot_table.slots);
4732 session->bc_slot_table.slots = NULL;
4733 }
4734 return;
4735}
4736
fc931582
AA		 4737/*
4738 * Initialize slot table
4739 */
050047ce
RL		 4740static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4741 int max_slots, int ivalue)
fc931582 4742{
fc931582
AA		 4743 struct nfs4_slot *slot;
4744 int ret = -ENOMEM;
4745
4746 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4747
050047ce 4748 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4749
8535b2be 4750 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4751 if (!slot)
4752 goto out;
fc931582
AA		 4753 ret = 0;
4754
4755 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4756 tbl->max_slots = max_slots;
4757 tbl->slots = slot;
4758 tbl->highest_used_slotid = -1; /* no slot is currently used */
4759 spin_unlock(&tbl->slot_tbl_lock);
4760 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4761 tbl, tbl->slots, tbl->max_slots);
4762out:
4763 dprintk("<-- %s: return %d\n", __func__, ret);
4764 return ret;
fc931582
AA		 4765}
4766
050047ce
RL		 4767/*
4768 * Initialize the forechannel and backchannel tables
4769 */
4770static int nfs4_init_slot_tables(struct nfs4_session *session)
4771{
f26468fb
TM		 4772 struct nfs4_slot_table *tbl;
4773 int status = 0;
050047ce 4774
f26468fb
TM		 4775 tbl = &session->fc_slot_table;
4776 if (tbl->slots == NULL) {
4777 status = nfs4_init_slot_table(tbl,
4778 session->fc_attrs.max_reqs, 1);
4779 if (status)
4780 return status;
4781 }
050047ce 4782
f26468fb
TM		 4783 tbl = &session->bc_slot_table;
4784 if (tbl->slots == NULL) {
4785 status = nfs4_init_slot_table(tbl,
4786 session->bc_attrs.max_reqs, 0);
4787 if (status)
4788 nfs4_destroy_slot_tables(session);
4789 }
f8625a6a
RL		 4790
4791 return status;
557134a3
AA		 4792}
4793
4794struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4795{
4796 struct nfs4_session *session;
4797 struct nfs4_slot_table *tbl;
4798
8535b2be 4799 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4800 if (!session)
4801 return NULL;
76db6d95 4802
76db6d95
AA		 4803 /*
4804 * The create session reply races with the server back
4805 * channel probe. Mark the client NFS_CS_SESSION_INITING
4806 * so that the client back channel can find the
4807 * nfs_client struct
4808 */
4809 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4810 init_completion(&session->complete);
76db6d95 4811
557134a3 4812 tbl = &session->fc_slot_table;
9dfdf404 4813 tbl->highest_used_slotid = -1;
557134a3 4814 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4815 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4816
4817 tbl = &session->bc_slot_table;
9dfdf404 4818 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4819 spin_lock_init(&tbl->slot_tbl_lock);
4820 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4821
557134a3
AA		 4822 session->clp = clp;
4823 return session;
4824}
4825
4826void nfs4_destroy_session(struct nfs4_session *session)
4827{
5a0ffe54
AA		 4828 nfs4_proc_destroy_session(session);
4829 dprintk("%s Destroy backchannel for xprt %p\n",
4830 __func__, session->clp->cl_rpcclient->cl_xprt);
4831 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4832 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4833 nfs4_destroy_slot_tables(session);
557134a3
AA		 4834 kfree(session);
4835}
4836
fc931582
AA		 4837/*
4838 * Initialize the values to be used by the client in CREATE_SESSION
4839 * If nfs4_init_session set the fore channel request and response sizes,
4840 * use them.
4841 *
4842 * Set the back channel max_resp_sz_cached to zero to force the client to
4843 * always set csa_cachethis to FALSE because the current implementation
4844 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4845 */
4846static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4847{
4848 struct nfs4_session *session = args->client->cl_session;
4849 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4850 mxresp_sz = session->fc_attrs.max_resp_sz;
4851
4852 if (mxrqst_sz == 0)
4853 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4854 if (mxresp_sz == 0)
4855 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4856 /* Fore channel attributes */
4857 args->fc_attrs.headerpadsz = 0;
4858 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4859 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4860 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4861 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4862
4863 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4864 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4865 __func__,
4866 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4867 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4868
4869 /* Back channel attributes */
4870 args->bc_attrs.headerpadsz = 0;
4871 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4872 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4873 args->bc_attrs.max_resp_sz_cached = 0;
4874 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4875 args->bc_attrs.max_reqs = 1;
4876
4877 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4878 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4879 __func__,
4880 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4881 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4882 args->bc_attrs.max_reqs);
4883}
4884
8d35301d
AA		 4885static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4886{
4887 if (rcvd <= sent)
4888 return 0;
4889 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4890 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4891 return -EINVAL;
4892}
4893
4894#define _verify_fore_channel_attr(_name_) \
4895 _verify_channel_attr("fore", #_name_, \
4896 args->fc_attrs._name_, \
4897 session->fc_attrs._name_)
4898
4899#define _verify_back_channel_attr(_name_) \
4900 _verify_channel_attr("back", #_name_, \
4901 args->bc_attrs._name_, \
4902 session->bc_attrs._name_)
4903
4904/*
4905 * The server is not allowed to increase the fore channel header pad size,
4906 * maximum response size, or maximum number of operations.
4907 *
4908 * The back channel attributes are only negotiatied down: We send what the
4909 * (back channel) server insists upon.
4910 */
4911static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4912 struct nfs4_session *session)
4913{
4914 int ret = 0;
4915
4916 ret |= _verify_fore_channel_attr(headerpadsz);
4917 ret |= _verify_fore_channel_attr(max_resp_sz);
4918 ret |= _verify_fore_channel_attr(max_ops);
4919
4920 ret |= _verify_back_channel_attr(headerpadsz);
4921 ret |= _verify_back_channel_attr(max_rqst_sz);
4922 ret |= _verify_back_channel_attr(max_resp_sz);
4923 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4924 ret |= _verify_back_channel_attr(max_ops);
4925 ret |= _verify_back_channel_attr(max_reqs);
4926
4927 return ret;
4928}
4929
fc931582
AA		 4930static int _nfs4_proc_create_session(struct nfs_client *clp)
4931{
4932 struct nfs4_session *session = clp->cl_session;
4933 struct nfs41_create_session_args args = {
4934 .client = clp,
4935 .cb_program = NFS4_CALLBACK,
4936 };
4937 struct nfs41_create_session_res res = {
4938 .client = clp,
4939 };
4940 struct rpc_message msg = {
4941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4942 .rpc_argp = &args,
4943 .rpc_resp = &res,
4944 };
4945 int status;
4946
4947 nfs4_init_channel_attrs(&args);
0f91421e 4948 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4949
4950 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4951
8d35301d
AA		 4952 if (!status)
4953 /* Verify the session's negotiated channel_attrs values */
4954 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4955 if (!status) {
4956 /* Increment the clientid slot sequence id */
4957 clp->cl_seqid++;
4958 }
4959
4960 return status;
4961}
4962
4963/*
4964 * Issues a CREATE_SESSION operation to the server.
4965 * It is the responsibility of the caller to verify the session is
4966 * expired before calling this routine.
4967 */
f26468fb 4968int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4969{
4970 int status;
4971 unsigned *ptr;
fc931582
AA		 4972 struct nfs4_session *session = clp->cl_session;
4973
4974 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4975
4976 status = _nfs4_proc_create_session(clp);
4977 if (status)
4978 goto out;
4979
f26468fb
TM		 4980 /* Init and reset the fore channel */
4981 status = nfs4_init_slot_tables(session);
4982 dprintk("slot table initialization returned %d\n", status);
4983 if (status)
4984 goto out;
4985 status = nfs4_reset_slot_tables(session);
4986 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4987 if (status)
4988 goto out;
4989
4990 ptr = (unsigned *)&session->sess_id.data[0];
4991 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4992 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4993out:
4994 dprintk("<-- %s\n", __func__);
4995 return status;
4996}
4997
0f3e66c6
AA		 4998/*
4999 * Issue the over-the-wire RPC DESTROY_SESSION.
5000 * The caller must serialize access to this routine.
5001 */
5002int nfs4_proc_destroy_session(struct nfs4_session *session)
5003{
5004 int status = 0;
5005 struct rpc_message msg;
5006
5007 dprintk("--> nfs4_proc_destroy_session\n");
5008
5009 /* session is still being setup */
5010 if (session->clp->cl_cons_state != NFS_CS_READY)
5011 return status;
5012
5013 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5014 msg.rpc_argp = session;
5015 msg.rpc_resp = NULL;
5016 msg.rpc_cred = NULL;
5017 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5018
5019 if (status)
5020 printk(KERN_WARNING
5021 "Got error %d from the server on DESTROY_SESSION. "
5022 "Session has been destroyed regardless...\n", status);
5023
5024 dprintk("<-- nfs4_proc_destroy_session\n");
5025 return status;
5026}
5027
fccba804
TM		 5028int nfs4_init_session(struct nfs_server *server)
5029{
5030 struct nfs_client *clp = server->nfs_client;
2449ea2e 5031 struct nfs4_session *session;
68bf05ef 5032 unsigned int rsize, wsize;
fccba804
TM		 5033 int ret;
5034
5035 if (!nfs4_has_session(clp))
5036 return 0;
5037
68bf05ef
AA		 5038 rsize = server->rsize;
5039 if (rsize == 0)
5040 rsize = NFS_MAX_FILE_IO_SIZE;
5041 wsize = server->wsize;
5042 if (wsize == 0)
5043 wsize = NFS_MAX_FILE_IO_SIZE;
5044
2449ea2e 5045 session = clp->cl_session;
68bf05ef
AA		 5046 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5047 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5048
fccba804
TM		 5049 ret = nfs4_recover_expired_lease(server);
5050 if (!ret)
5051 ret = nfs4_check_client_ready(clp);
5052 return ret;
5053}
5054
fc01cea9
AA		 5055/*
5056 * Renew the cl_session lease.
5057 */
d5f8d3fe
TM		 5058struct nfs4_sequence_data {
5059 struct nfs_client *clp;
5060 struct nfs4_sequence_args args;
5061 struct nfs4_sequence_res res;
5062};
5063
dc96aef9
AB		 5064static void nfs41_sequence_release(void *data)
5065{
d5f8d3fe
TM		 5066 struct nfs4_sequence_data *calldata = data;
5067 struct nfs_client *clp = calldata->clp;
dc96aef9 5068
7135840f
AB		 5069 if (atomic_read(&clp->cl_count) > 1)
5070 nfs4_schedule_state_renewal(clp);
5071 nfs_put_client(clp);
d5f8d3fe 5072 kfree(calldata);
dc96aef9
AB		 5073}
5074
aa5190d0
TM		 5075static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5076{
5077 switch(task->tk_status) {
5078 case -NFS4ERR_DELAY:
5079 case -EKEYEXPIRED:
5080 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5081 return -EAGAIN;
5082 default:
5083 nfs4_schedule_state_recovery(clp);
5084 }
5085 return 0;
5086}
5087
dc96aef9 5088static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5089{
d5f8d3fe
TM		 5090 struct nfs4_sequence_data *calldata = data;
5091 struct nfs_client *clp = calldata->clp;
fc01cea9 5092
d185a334 5093 nfs41_sequence_done(task->tk_msg.rpc_resp);
fc01cea9
AA		 5094
5095 if (task->tk_status < 0) {
5096 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5097 if (atomic_read(&clp->cl_count) == 1)
5098 goto out;
fc01cea9 5099
aa5190d0
TM		 5100 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5101 rpc_restart_call_prepare(task);
fc01cea9
AA		 5102 return;
5103 }
5104 }
fc01cea9 5105 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5106out:
fc01cea9
AA		 5107 dprintk("<-- %s\n", __func__);
5108}
5109
5110static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5111{
d5f8d3fe
TM		 5112 struct nfs4_sequence_data *calldata = data;
5113 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5114 struct nfs4_sequence_args *args;
5115 struct nfs4_sequence_res *res;
5116
fc01cea9
AA		 5117 args = task->tk_msg.rpc_argp;
5118 res = task->tk_msg.rpc_resp;
5119
035168ab 5120 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5121 return;
5122 rpc_call_start(task);
5123}
5124
5125static const struct rpc_call_ops nfs41_sequence_ops = {
5126 .rpc_call_done = nfs41_sequence_call_done,
5127 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5128 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5129};
5130
71ac6da9 5131static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5132{
d5f8d3fe 5133 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5134 struct rpc_message msg = {
5135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5136 .rpc_cred = cred,
5137 };
71ac6da9
TM		 5138 struct rpc_task_setup task_setup_data = {
5139 .rpc_client = clp->cl_rpcclient,
5140 .rpc_message = &msg,
5141 .callback_ops = &nfs41_sequence_ops,
5142 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5143 };
fc01cea9 5144
7135840f 5145 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5146 return ERR_PTR(-EIO);
d5f8d3fe
TM		 5147 calldata = kmalloc(sizeof(*calldata), GFP_NOFS);
5148 if (calldata == NULL) {
7135840f 5149 nfs_put_client(clp);
71ac6da9 5150 return ERR_PTR(-ENOMEM);
fc01cea9 5151 }
d5f8d3fe
TM		 5152 calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5153 msg.rpc_argp = &calldata->args;
5154 msg.rpc_resp = &calldata->res;
5155 calldata->clp = clp;
71ac6da9 5156 task_setup_data.callback_data = calldata;
fc01cea9 5157
71ac6da9
TM		 5158 return rpc_run_task(&task_setup_data);
5159}
5160
5161static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5162{
5163 struct rpc_task *task;
5164 int ret = 0;
5165
5166 task = _nfs41_proc_sequence(clp, cred);
5167 if (IS_ERR(task))
5168 ret = PTR_ERR(task);
5169 else
5170 rpc_put_task(task);
5171 dprintk("<-- %s status=%d\n", __func__, ret);
5172 return ret;
5173}
5174
5175static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5176{
5177 struct rpc_task *task;
5178 int ret;
5179
5180 task = _nfs41_proc_sequence(clp, cred);
5181 if (IS_ERR(task)) {
5182 ret = PTR_ERR(task);
5183 goto out;
5184 }
5185 ret = rpc_wait_for_completion_task(task);
5186 if (!ret)
5187 ret = task->tk_status;
5188 rpc_put_task(task);
5189out:
5190 dprintk("<-- %s status=%d\n", __func__, ret);
5191 return ret;
fc01cea9
AA		 5192}
5193
fce5c838
RL		 5194struct nfs4_reclaim_complete_data {
5195 struct nfs_client *clp;
5196 struct nfs41_reclaim_complete_args arg;
5197 struct nfs41_reclaim_complete_res res;
5198};
5199
5200static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5201{
5202 struct nfs4_reclaim_complete_data *calldata = data;
5203
b257957e 5204 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5205 if (nfs41_setup_sequence(calldata->clp->cl_session,
5206 &calldata->arg.seq_args,
fce5c838
RL		 5207 &calldata->res.seq_res, 0, task))
5208 return;
5209
5210 rpc_call_start(task);
5211}
5212
aa5190d0
TM		 5213static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5214{
5215 switch(task->tk_status) {
5216 case 0:
5217 case -NFS4ERR_COMPLETE_ALREADY:
5218 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5219 break;
5220 case -NFS4ERR_DELAY:
5221 case -EKEYEXPIRED:
5222 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5223 return -EAGAIN;
5224 default:
5225 nfs4_schedule_state_recovery(clp);
5226 }
5227 return 0;
5228}
5229
fce5c838
RL		 5230static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5231{
5232 struct nfs4_reclaim_complete_data *calldata = data;
5233 struct nfs_client *clp = calldata->clp;
5234 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5235
5236 dprintk("--> %s\n", __func__);
d185a334 5237 nfs41_sequence_done(res);
fce5c838 5238
aa5190d0
TM		 5239 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5240 rpc_restart_call_prepare(task);
5241 return;
5242 }
fce5c838
RL		 5243 dprintk("<-- %s\n", __func__);
5244}
5245
5246static void nfs4_free_reclaim_complete_data(void *data)
5247{
5248 struct nfs4_reclaim_complete_data *calldata = data;
5249
5250 kfree(calldata);
5251}
5252
5253static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5254 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5255 .rpc_call_done = nfs4_reclaim_complete_done,
5256 .rpc_release = nfs4_free_reclaim_complete_data,
5257};
5258
5259/*
5260 * Issue a global reclaim complete.
5261 */
5262static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5263{
5264 struct nfs4_reclaim_complete_data *calldata;
5265 struct rpc_task *task;
5266 struct rpc_message msg = {
5267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5268 };
5269 struct rpc_task_setup task_setup_data = {
5270 .rpc_client = clp->cl_rpcclient,
5271 .rpc_message = &msg,
5272 .callback_ops = &nfs4_reclaim_complete_call_ops,
5273 .flags = RPC_TASK_ASYNC,
5274 };
5275 int status = -ENOMEM;
5276
5277 dprintk("--> %s\n", __func__);
8535b2be 5278 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5279 if (calldata == NULL)
5280 goto out;
5281 calldata->clp = clp;
5282 calldata->arg.one_fs = 0;
5283 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5284
5285 msg.rpc_argp = &calldata->arg;
5286 msg.rpc_resp = &calldata->res;
5287 task_setup_data.callback_data = calldata;
5288 task = rpc_run_task(&task_setup_data);
acf82b85 5289 if (IS_ERR(task)) {
fce5c838 5290 status = PTR_ERR(task);
acf82b85
DC		 5291 goto out;
5292 }
fce5c838 5293 rpc_put_task(task);
acf82b85 5294 return 0;
fce5c838
RL		 5295out:
5296 dprintk("<-- %s status=%d\n", __func__, status);
5297 return status;
5298}
557134a3
AA		 5299#endif /* CONFIG_NFS_V4_1 */
5300
591d71cb 5301struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5302 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5303 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5304 .recover_open = nfs4_open_reclaim,
5305 .recover_lock = nfs4_lock_reclaim,
591d71cb 5306 .establish_clid = nfs4_init_clientid,
90a16617 5307 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5308};
5309
591d71cb
AA		 5310#if defined(CONFIG_NFS_V4_1)
5311struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5312 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5313 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5314 .recover_open = nfs4_open_reclaim,
5315 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5316 .establish_clid = nfs41_init_clientid,
b4b82607 5317 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5318 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5319};
5320#endif /* CONFIG_NFS_V4_1 */
5321
5322struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5323 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5324 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5325 .recover_open = nfs4_open_expired,
5326 .recover_lock = nfs4_lock_expired,
5327 .establish_clid = nfs4_init_clientid,
90a16617 5328 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5329};
5330
5331#if defined(CONFIG_NFS_V4_1)
5332struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5333 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5334 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5335 .recover_open = nfs4_open_expired,
5336 .recover_lock = nfs4_lock_expired,
4d643d1d 5337 .establish_clid = nfs41_init_clientid,
b4b82607 5338 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5339};
591d71cb 5340#endif /* CONFIG_NFS_V4_1 */
1da177e4 5341
29fba38b
BH		 5342struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5343 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5344 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5345 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5346};
5347
5348#if defined(CONFIG_NFS_V4_1)
5349struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5350 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5351 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5352 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5353};
5354#endif
5355
97dc1359
TM		 5356static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5357 .minor_version = 0,
5358 .call_sync = _nfs4_call_sync,
e047a10c 5359 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5360 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5361 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5362 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5363};
5364
5365#if defined(CONFIG_NFS_V4_1)
5366static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5367 .minor_version = 1,
5368 .call_sync = _nfs4_call_sync_session,
e047a10c 5369 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5370 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5371 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5372 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5373};
5374#endif
5375
97dc1359
TM		 5376const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5377 [0] = &nfs_v4_0_minor_ops,
5378#if defined(CONFIG_NFS_V4_1)
5379 [1] = &nfs_v4_1_minor_ops,
5380#endif
5381};
5382
92e1d5be 5383static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5384 .permission = nfs_permission,
5385 .getattr = nfs_getattr,
5386 .setattr = nfs_setattr,
5387 .getxattr = nfs4_getxattr,
5388 .setxattr = nfs4_setxattr,
5389 .listxattr = nfs4_listxattr,
5390};
5391
509de811 5392const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5393 .version = 4, /* protocol version */
5394 .dentry_ops = &nfs4_dentry_operations,
5395 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5396 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5397 .getroot = nfs4_proc_get_root,
5398 .getattr = nfs4_proc_getattr,
5399 .setattr = nfs4_proc_setattr,
2b3de441 5400 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5401 .lookup = nfs4_proc_lookup,
5402 .access = nfs4_proc_access,
5403 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5404 .create = nfs4_proc_create,
5405 .remove = nfs4_proc_remove,
5406 .unlink_setup = nfs4_proc_unlink_setup,
5407 .unlink_done = nfs4_proc_unlink_done,
5408 .rename = nfs4_proc_rename,
5409 .link = nfs4_proc_link,
5410 .symlink = nfs4_proc_symlink,
5411 .mkdir = nfs4_proc_mkdir,
5412 .rmdir = nfs4_proc_remove,
5413 .readdir = nfs4_proc_readdir,
5414 .mknod = nfs4_proc_mknod,
5415 .statfs = nfs4_proc_statfs,
5416 .fsinfo = nfs4_proc_fsinfo,
5417 .pathconf = nfs4_proc_pathconf,
e9326dca 5418 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5419 .decode_dirent = nfs4_decode_dirent,
5420 .read_setup = nfs4_proc_read_setup,
ec06c096 5421 .read_done = nfs4_read_done,
1da177e4 5422 .write_setup = nfs4_proc_write_setup,
788e7a89 5423 .write_done = nfs4_write_done,
1da177e4 5424 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5425 .commit_done = nfs4_commit_done,
1da177e4 5426 .lock = nfs4_proc_lock,
e50a1c2e 5427 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5428 .close_context = nfs4_close_context,
1da177e4
LT		 5429};
5430
5431/*
5432 * Local variables:
5433 * c-basic-offset: 8
5434 * End:
5435 */
Linux 6.x block layer and io_uring tree(s)