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NFS: introduce generic decode_getattr function
[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 258 case -NFS4ERR_STALE_CLIENTID:
65de872e 259 case -NFS4ERR_EXPIRED:
a2c0b9e2 260 goto do_state_recovery;
03391693 261#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 262 case -NFS4ERR_BADSESSION:
263 case -NFS4ERR_BADSLOT:
264 case -NFS4ERR_BAD_HIGH_SLOT:
265 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
266 case -NFS4ERR_DEADSESSION:
267 case -NFS4ERR_SEQ_FALSE_RETRY:
268 case -NFS4ERR_SEQ_MISORDERED:
269 dprintk("%s ERROR: %d Reset session\n", __func__,
270 errorcode);
0b9e2d41 271 nfs4_schedule_state_recovery(clp);
4745e315 272 exception->retry = 1;
b9179237 273 break;
03391693 274#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 275 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 276 if (exception->timeout > HZ) {
277 /* We have retried a decent amount, time to
278 * fail
279 */
280 ret = -EBUSY;
281 break;
282 }
65de872e
TM		 283 case -NFS4ERR_GRACE:
284 case -NFS4ERR_DELAY:
2c643488 285 case -EKEYEXPIRED:
65de872e
TM		 286 ret = nfs4_delay(server->client, &exception->timeout);
287 if (ret != 0)
288 break;
289 case -NFS4ERR_OLD_STATEID:
290 exception->retry = 1;
291 }
292 /* We failed to handle the error */
293 return nfs4_map_errors(ret);
a2c0b9e2
TM		 294do_state_recovery:
295 nfs4_schedule_state_recovery(clp);
296 ret = nfs4_wait_clnt_recover(clp);
297 if (ret == 0)
298 exception->retry = 1;
299 return ret;
65de872e
TM		 300}
301
302
452e9352 303static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 304{
1da177e4
LT		 305 spin_lock(&clp->cl_lock);
306 if (time_before(clp->cl_last_renewal,timestamp))
307 clp->cl_last_renewal = timestamp;
308 spin_unlock(&clp->cl_lock);
309}
310
452e9352
TM		 311static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
312{
313 do_renew_lease(server->nfs_client, timestamp);
314}
315
cccef3b9
AA		 316#if defined(CONFIG_NFS_V4_1)
317
e2c4ab3c
AA		 318/*
319 * nfs4_free_slot - free a slot and efficiently update slot table.
320 *
321 * freeing a slot is trivially done by clearing its respective bit
322 * in the bitmap.
323 * If the freed slotid equals highest_used_slotid we want to update it
324 * so that the server would be able to size down the slot table if needed,
325 * otherwise we know that the highest_used_slotid is still in use.
326 * When updating highest_used_slotid there may be "holes" in the bitmap
327 * so we need to scan down from highest_used_slotid to 0 looking for the now
328 * highest slotid in use.
329 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 330 *
331 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 332 */
333static void
dfb4f309 334nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
e2c4ab3c 335{
dfb4f309 336 int free_slotid = free_slot - tbl->slots;
e2c4ab3c
AA		 337 int slotid = free_slotid;
338
dfb4f309 339 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 340 /* clear used bit in bitmap */
341 __clear_bit(slotid, tbl->used_slots);
342
343 /* update highest_used_slotid when it is freed */
344 if (slotid == tbl->highest_used_slotid) {
345 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 346 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 347 tbl->highest_used_slotid = slotid;
348 else
349 tbl->highest_used_slotid = -1;
350 }
e2c4ab3c
AA		 351 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
352 free_slotid, tbl->highest_used_slotid);
353}
354
3bfb0fc5
AB		 355/*
356 * Signal state manager thread if session is drained
357 */
358static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
359{
689cf5c1
AB		 360 struct rpc_task *task;
361
a2118c33 362 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 363 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
364 if (task)
365 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 366 return;
367 }
368
369 if (ses->fc_slot_table.highest_used_slotid != -1)
370 return;
371
372 dprintk("%s COMPLETE: Session Drained\n", __func__);
373 complete(&ses->complete);
374}
375
d185a334 376static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 377{
378 struct nfs4_slot_table *tbl;
379
d185a334 380 tbl = &res->sr_session->fc_slot_table;
dfb4f309 381 if (!res->sr_slot) {
13615871
AA		 382 /* just wake up the next guy waiting since
383 * we may have not consumed a slot after all */
691daf3b 384 dprintk("%s: No slot\n", __func__);
35dc1d74 385 return;
13615871 386 }
ea028ac9 387
35dc1d74 388 spin_lock(&tbl->slot_tbl_lock);
dfb4f309 389 nfs4_free_slot(tbl, res->sr_slot);
d185a334 390 nfs41_check_drain_session_complete(res->sr_session);
35dc1d74 391 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 392 res->sr_slot = NULL;
13615871
AA		 393}
394
14516c3a 395static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 396{
397 unsigned long timestamp;
14516c3a 398 struct nfs_client *clp;
b0df806c
AA		 399
400 /*
401 * sr_status remains 1 if an RPC level error occurred. The server
402 * may or may not have processed the sequence operation..
403 * Proceed as if the server received and processed the sequence
404 * operation.
405 */
406 if (res->sr_status == 1)
407 res->sr_status = NFS_OK;
408
409 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
dfb4f309 410 if (!res->sr_slot)
b0df806c
AA		 411 goto out;
412
691daf3b 413 /* Check the SEQUENCE operation status */
14516c3a
TM		 414 switch (res->sr_status) {
415 case 0:
b0df806c 416 /* Update the slot's sequence and clientid lease timer */
dfb4f309 417 ++res->sr_slot->seq_nr;
b0df806c 418 timestamp = res->sr_renewal_time;
14516c3a 419 clp = res->sr_session->clp;
452e9352 420 do_renew_lease(clp, timestamp);
0629e370 421 /* Check sequence flags */
7135840f
AB		 422 if (atomic_read(&clp->cl_count) > 1)
423 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
14516c3a
TM		 424 break;
425 case -NFS4ERR_DELAY:
426 /* The server detected a resend of the RPC call and
427 * returned NFS4ERR_DELAY as per Section 2.10.6.2
428 * of RFC5661.
429 */
dfb4f309
BH		 430 dprintk("%s: slot=%ld seq=%d: Operation in progress\n",
431 __func__,
432 res->sr_slot - res->sr_session->fc_slot_table.slots,
433 res->sr_slot->seq_nr);
14516c3a
TM		 434 goto out_retry;
435 default:
436 /* Just update the slot sequence no. */
dfb4f309 437 ++res->sr_slot->seq_nr;
b0df806c
AA		 438 }
439out:
440 /* The session may be reset by one of the error handlers. */
441 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 442 nfs41_sequence_free_slot(res);
14516c3a
TM		 443 return 1;
444out_retry:
d05dd4e9 445 if (!rpc_restart_call(task))
14516c3a
TM		 446 goto out;
447 rpc_delay(task, NFS4_POLL_RETRY_MAX);
448 return 0;
b0df806c
AA		 449}
450
14516c3a
TM		 451static int nfs4_sequence_done(struct rpc_task *task,
452 struct nfs4_sequence_res *res)
df896455 453{
14516c3a
TM		 454 if (res->sr_session == NULL)
455 return 1;
456 return nfs41_sequence_done(task, res);
df896455
TM		 457}
458
510b8175
BH		 459/*
460 * nfs4_find_slot - efficiently look for a free slot
461 *
462 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
463 * If found, we mark the slot as used, update the highest_used_slotid,
464 * and respectively set up the sequence operation args.
465 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 466 *
467 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 468 */
469static u8
40ead580 470nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 471{
472 int slotid;
473 u8 ret_id = NFS4_MAX_SLOT_TABLE;
474 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
475
510b8175
BH		 476 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
477 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
478 tbl->max_slots);
479 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
480 if (slotid >= tbl->max_slots)
481 goto out;
482 __set_bit(slotid, tbl->used_slots);
483 if (slotid > tbl->highest_used_slotid)
484 tbl->highest_used_slotid = slotid;
485 ret_id = slotid;
486out:
487 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
488 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 489 return ret_id;
490}
491
ce5039c1
AA		 492static int nfs41_setup_sequence(struct nfs4_session *session,
493 struct nfs4_sequence_args *args,
494 struct nfs4_sequence_res *res,
495 int cache_reply,
496 struct rpc_task *task)
497{
fbcd4abc
AA		 498 struct nfs4_slot *slot;
499 struct nfs4_slot_table *tbl;
500 u8 slotid;
501
502 dprintk("--> %s\n", __func__);
ce5039c1 503 /* slot already allocated? */
dfb4f309 504 if (res->sr_slot != NULL)
ce5039c1
AA		 505 return 0;
506
fbcd4abc
AA		 507 tbl = &session->fc_slot_table;
508
509 spin_lock(&tbl->slot_tbl_lock);
a2118c33 510 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 511 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 512 /*
513 * The state manager will wait until the slot table is empty.
514 * Schedule the reset thread
515 */
05f0d236 516 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 517 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 518 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 519 return -EAGAIN;
b069d94a
AA		 520 }
521
689cf5c1
AB		 522 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
523 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
524 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
525 spin_unlock(&tbl->slot_tbl_lock);
526 dprintk("%s enforce FIFO order\n", __func__);
527 return -EAGAIN;
528 }
529
40ead580 530 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 531 if (slotid == NFS4_MAX_SLOT_TABLE) {
532 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
533 spin_unlock(&tbl->slot_tbl_lock);
534 dprintk("<-- %s: no free slots\n", __func__);
535 return -EAGAIN;
536 }
537 spin_unlock(&tbl->slot_tbl_lock);
538
689cf5c1 539 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 540 slot = tbl->slots + slotid;
99fe60d0 541 args->sa_session = session;
fbcd4abc
AA		 542 args->sa_slotid = slotid;
543 args->sa_cache_this = cache_reply;
544
545 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
546
99fe60d0 547 res->sr_session = session;
dfb4f309 548 res->sr_slot = slot;
fbcd4abc 549 res->sr_renewal_time = jiffies;
2a6e26cd 550 res->sr_status_flags = 0;
fbcd4abc
AA		 551 /*
552 * sr_status is only set in decode_sequence, and so will remain
553 * set to 1 if an rpc level failure occurs.
554 */
555 res->sr_status = 1;
ce5039c1
AA		 556 return 0;
557}
558
035168ab 559int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 560 struct nfs4_sequence_args *args,
561 struct nfs4_sequence_res *res,
562 int cache_reply,
563 struct rpc_task *task)
564{
035168ab 565 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 566 int ret = 0;
567
035168ab
TM		 568 if (session == NULL) {
569 args->sa_session = NULL;
570 res->sr_session = NULL;
571 goto out;
572 }
573
dfb4f309
BH		 574 dprintk("--> %s clp %p session %p sr_slot %ld\n",
575 __func__, session->clp, session, res->sr_slot ?
576 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 577
035168ab 578 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 579 task);
ce5039c1
AA		 580out:
581 dprintk("<-- %s status=%d\n", __func__, ret);
582 return ret;
583}
584
585struct nfs41_call_sync_data {
035168ab 586 const struct nfs_server *seq_server;
ce5039c1
AA		 587 struct nfs4_sequence_args *seq_args;
588 struct nfs4_sequence_res *seq_res;
589 int cache_reply;
590};
591
592static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
593{
594 struct nfs41_call_sync_data *data = calldata;
595
035168ab
TM		 596 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
597
598 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 599 data->seq_res, data->cache_reply, task))
600 return;
601 rpc_call_start(task);
602}
603
b257957e
AB		 604static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
605{
606 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
607 nfs41_call_sync_prepare(task, calldata);
608}
609
69ab40c4
AA		 610static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
611{
612 struct nfs41_call_sync_data *data = calldata;
613
14516c3a 614 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 615}
616
ce5039c1
AA		 617struct rpc_call_ops nfs41_call_sync_ops = {
618 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 619 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 620};
621
b257957e
AB		 622struct rpc_call_ops nfs41_call_priv_sync_ops = {
623 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
624 .rpc_call_done = nfs41_call_sync_done,
625};
626
035168ab 627static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 628 struct rpc_message *msg,
629 struct nfs4_sequence_args *args,
630 struct nfs4_sequence_res *res,
b257957e
AB		 631 int cache_reply,
632 int privileged)
ce5039c1
AA		 633{
634 int ret;
635 struct rpc_task *task;
636 struct nfs41_call_sync_data data = {
035168ab 637 .seq_server = server,
ce5039c1
AA		 638 .seq_args = args,
639 .seq_res = res,
640 .cache_reply = cache_reply,
641 };
642 struct rpc_task_setup task_setup = {
035168ab 643 .rpc_client = server->client,
ce5039c1
AA		 644 .rpc_message = msg,
645 .callback_ops = &nfs41_call_sync_ops,
646 .callback_data = &data
647 };
648
dfb4f309 649 res->sr_slot = NULL;
b257957e
AB		 650 if (privileged)
651 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 652 task = rpc_run_task(&task_setup);
653 if (IS_ERR(task))
654 ret = PTR_ERR(task);
655 else {
656 ret = task->tk_status;
657 rpc_put_task(task);
658 }
659 return ret;
660}
661
cccef3b9
AA		 662int _nfs4_call_sync_session(struct nfs_server *server,
663 struct rpc_message *msg,
664 struct nfs4_sequence_args *args,
665 struct nfs4_sequence_res *res,
666 int cache_reply)
667{
035168ab 668 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 669}
670
df896455 671#else
14516c3a
TM		 672static int nfs4_sequence_done(struct rpc_task *task,
673 struct nfs4_sequence_res *res)
df896455 674{
14516c3a 675 return 1;
df896455 676}
cccef3b9
AA		 677#endif /* CONFIG_NFS_V4_1 */
678
679int _nfs4_call_sync(struct nfs_server *server,
680 struct rpc_message *msg,
681 struct nfs4_sequence_args *args,
682 struct nfs4_sequence_res *res,
683 int cache_reply)
684{
f3752975 685 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 686 return rpc_call_sync(server->client, msg, 0);
687}
688
689#define nfs4_call_sync(server, msg, args, res, cache_reply) \
97dc1359 690 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
cccef3b9
AA		 691 &(res)->seq_res, (cache_reply))
692
38478b24 693static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 694{
38478b24 695 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 696
38478b24 697 spin_lock(&dir->i_lock);
40d24704
TM		 698 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
699 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 700 nfs_force_lookup_revalidate(dir);
40d24704 701 nfsi->change_attr = cinfo->after;
38478b24 702 spin_unlock(&dir->i_lock);
1da177e4
LT		 703}
704
e56e0b78 705struct nfs4_opendata {
c6d00e63 706 struct kref kref;
e56e0b78
TM		 707 struct nfs_openargs o_arg;
708 struct nfs_openres o_res;
cdd4e68b
TM		 709 struct nfs_open_confirmargs c_arg;
710 struct nfs_open_confirmres c_res;
e56e0b78
TM		 711 struct nfs_fattr f_attr;
712 struct nfs_fattr dir_attr;
ad389da7 713 struct path path;
e56e0b78
TM		 714 struct dentry *dir;
715 struct nfs4_state_owner *owner;
aac00a8d 716 struct nfs4_state *state;
e56e0b78 717 struct iattr attrs;
26e976a8 718 unsigned long timestamp;
3e309914 719 unsigned int rpc_done : 1;
24ac23ab
TM		 720 int rpc_status;
721 int cancelled;
e56e0b78
TM		 722};
723
2ced46c2
TM		 724
725static void nfs4_init_opendata_res(struct nfs4_opendata *p)
726{
727 p->o_res.f_attr = &p->f_attr;
728 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 729 p->o_res.seqid = p->o_arg.seqid;
730 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 731 p->o_res.server = p->o_arg.server;
732 nfs_fattr_init(&p->f_attr);
733 nfs_fattr_init(&p->dir_attr);
734}
735
ad389da7 736static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 737 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 738 const struct iattr *attrs,
739 gfp_t gfp_mask)
e56e0b78 740{
ad389da7 741 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 742 struct inode *dir = parent->d_inode;
743 struct nfs_server *server = NFS_SERVER(dir);
744 struct nfs4_opendata *p;
745
8535b2be 746 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 747 if (p == NULL)
748 goto err;
8535b2be 749 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 750 if (p->o_arg.seqid == NULL)
751 goto err_free;
f6948697
AV		 752 path_get(path);
753 p->path = *path;
e56e0b78
TM		 754 p->dir = parent;
755 p->owner = sp;
756 atomic_inc(&sp->so_count);
757 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 758 p->o_arg.open_flags = flags;
759 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 760 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 761 p->o_arg.id = sp->so_owner_id.id;
ad389da7 762 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 763 p->o_arg.server = server;
764 p->o_arg.bitmask = server->attr_bitmask;
765 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 766 if (flags & O_CREAT) {
767 u32 *s;
768
e56e0b78
TM		 769 p->o_arg.u.attrs = &p->attrs;
770 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 771 s = (u32 *) p->o_arg.u.verifier.data;
772 s[0] = jiffies;
773 s[1] = current->pid;
e56e0b78 774 }
cdd4e68b
TM		 775 p->c_arg.fh = &p->o_res.fh;
776 p->c_arg.stateid = &p->o_res.stateid;
777 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 778 nfs4_init_opendata_res(p);
c6d00e63 779 kref_init(&p->kref);
e56e0b78
TM		 780 return p;
781err_free:
782 kfree(p);
783err:
784 dput(parent);
785 return NULL;
786}
787
c6d00e63 788static void nfs4_opendata_free(struct kref *kref)
e56e0b78 789{
c6d00e63
TM		 790 struct nfs4_opendata *p = container_of(kref,
791 struct nfs4_opendata, kref);
792
793 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 794 if (p->state != NULL)
795 nfs4_put_open_state(p->state);
c6d00e63
TM		 796 nfs4_put_state_owner(p->owner);
797 dput(p->dir);
31f31db1 798 path_put(&p->path);
c6d00e63
TM		 799 kfree(p);
800}
801
802static void nfs4_opendata_put(struct nfs4_opendata *p)
803{
804 if (p != NULL)
805 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 806}
807
06f814a3
TM		 808static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
809{
06f814a3
TM		 810 int ret;
811
06f814a3 812 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 813 return ret;
814}
815
dc0b027d 816static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 817{
818 int ret = 0;
dc0b027d
TM		 819
820 if (open_mode & O_EXCL)
821 goto out;
822 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 823 case FMODE_READ:
88069f77
TM		 824 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
825 && state->n_rdonly != 0;
6ee41268
TM		 826 break;
827 case FMODE_WRITE:
88069f77
TM		 828 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
829 && state->n_wronly != 0;
6ee41268
TM		 830 break;
831 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 832 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
833 && state->n_rdwr != 0;
6ee41268 834 }
dc0b027d 835out:
6ee41268
TM		 836 return ret;
837}
838
dc0b027d 839static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 840{
dc0b027d 841 if ((delegation->type & fmode) != fmode)
aac00a8d 842 return 0;
15c831bf 843 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 844 return 0;
b7391f44 845 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 846 return 1;
847}
848
dc0b027d 849static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 850{
dc0b027d 851 switch (fmode) {
e7616923
TM		 852 case FMODE_WRITE:
853 state->n_wronly++;
854 break;
855 case FMODE_READ:
856 state->n_rdonly++;
857 break;
858 case FMODE_READ|FMODE_WRITE:
859 state->n_rdwr++;
860 }
dc0b027d 861 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 862}
863
dc0b027d 864static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 865{
866 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
867 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
868 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 869 switch (fmode) {
003707c7
TM		 870 case FMODE_READ:
871 set_bit(NFS_O_RDONLY_STATE, &state->flags);
872 break;
873 case FMODE_WRITE:
874 set_bit(NFS_O_WRONLY_STATE, &state->flags);
875 break;
876 case FMODE_READ|FMODE_WRITE:
877 set_bit(NFS_O_RDWR_STATE, &state->flags);
878 }
e7616923
TM		 879}
880
dc0b027d 881static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 882{
8bda4e4c 883 write_seqlock(&state->seqlock);
dc0b027d 884 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 885 write_sequnlock(&state->seqlock);
003707c7
TM		 886}
887
dc0b027d 888static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 889{
8bda4e4c
TM		 890 /*
891 * Protect the call to nfs4_state_set_mode_locked and
892 * serialise the stateid update
893 */
894 write_seqlock(&state->seqlock);
003707c7
TM		 895 if (deleg_stateid != NULL) {
896 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
897 set_bit(NFS_DELEGATED_STATE, &state->flags);
898 }
899 if (open_stateid != NULL)
dc0b027d 900 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 901 write_sequnlock(&state->seqlock);
902 spin_lock(&state->owner->so_lock);
dc0b027d 903 update_open_stateflags(state, fmode);
ec073428 904 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 905}
906
dc0b027d 907static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 908{
909 struct nfs_inode *nfsi = NFS_I(state->inode);
910 struct nfs_delegation *deleg_cur;
911 int ret = 0;
912
dc0b027d 913 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 914
915 rcu_read_lock();
916 deleg_cur = rcu_dereference(nfsi->delegation);
917 if (deleg_cur == NULL)
918 goto no_delegation;
919
920 spin_lock(&deleg_cur->lock);
921 if (nfsi->delegation != deleg_cur ||
dc0b027d 922 (deleg_cur->type & fmode) != fmode)
34310430
TM		 923 goto no_delegation_unlock;
924
925 if (delegation == NULL)
926 delegation = &deleg_cur->stateid;
927 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
928 goto no_delegation_unlock;
929
b7391f44 930 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 931 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 932 ret = 1;
933no_delegation_unlock:
934 spin_unlock(&deleg_cur->lock);
935no_delegation:
936 rcu_read_unlock();
937
938 if (!ret && open_stateid != NULL) {
dc0b027d 939 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 940 ret = 1;
941 }
942
943 return ret;
944}
945
946
dc0b027d 947static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 948{
949 struct nfs_delegation *delegation;
950
951 rcu_read_lock();
952 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 953 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 954 rcu_read_unlock();
955 return;
956 }
957 rcu_read_unlock();
958 nfs_inode_return_delegation(inode);
959}
960
6ee41268 961static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 962{
963 struct nfs4_state *state = opendata->state;
964 struct nfs_inode *nfsi = NFS_I(state->inode);
965 struct nfs_delegation *delegation;
dc0b027d
TM		 966 int open_mode = opendata->o_arg.open_flags & O_EXCL;
967 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 968 nfs4_stateid stateid;
969 int ret = -EAGAIN;
970
aac00a8d 971 for (;;) {
dc0b027d 972 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 973 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 974 if (can_open_cached(state, fmode, open_mode)) {
975 update_open_stateflags(state, fmode);
6ee41268 976 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 977 goto out_return_state;
978 }
979 spin_unlock(&state->owner->so_lock);
980 }
34310430
TM		 981 rcu_read_lock();
982 delegation = rcu_dereference(nfsi->delegation);
983 if (delegation == NULL ||
dc0b027d 984 !can_open_delegated(delegation, fmode)) {
34310430 985 rcu_read_unlock();
aac00a8d 986 break;
34310430 987 }
aac00a8d
TM		 988 /* Save the delegation */
989 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
990 rcu_read_unlock();
af22f94a 991 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 992 if (ret != 0)
993 goto out;
994 ret = -EAGAIN;
34310430
TM		 995
996 /* Try to update the stateid using the delegation */
dc0b027d 997 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 998 goto out_return_state;
aac00a8d 999 }
aac00a8d
TM		 1000out:
1001 return ERR_PTR(ret);
1002out_return_state:
1003 atomic_inc(&state->count);
1004 return state;
1005}
1006
24ac23ab
TM		 1007static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1008{
1009 struct inode *inode;
1010 struct nfs4_state *state = NULL;
003707c7 1011 struct nfs_delegation *delegation;
1b370bc2 1012 int ret;
24ac23ab 1013
aac00a8d 1014 if (!data->rpc_done) {
6ee41268 1015 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1016 goto out;
1017 }
1018
1b370bc2 1019 ret = -EAGAIN;
24ac23ab 1020 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1021 goto err;
24ac23ab 1022 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1023 ret = PTR_ERR(inode);
03f28e3a 1024 if (IS_ERR(inode))
1b370bc2
TM		 1025 goto err;
1026 ret = -ENOMEM;
24ac23ab
TM		 1027 state = nfs4_get_open_state(inode, data->owner);
1028 if (state == NULL)
1b370bc2 1029 goto err_put_inode;
549d6ed5 1030 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1031 int delegation_flags = 0;
1032
003707c7
TM		 1033 rcu_read_lock();
1034 delegation = rcu_dereference(NFS_I(inode)->delegation);
1035 if (delegation)
1036 delegation_flags = delegation->flags;
1037 rcu_read_unlock();
15c831bf 1038 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1039 nfs_inode_set_delegation(state->inode,
1040 data->owner->so_cred,
1041 &data->o_res);
1042 else
1043 nfs_inode_reclaim_delegation(state->inode,
1044 data->owner->so_cred,
1045 &data->o_res);
1046 }
34310430
TM		 1047
1048 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1049 data->o_arg.fmode);
24ac23ab 1050 iput(inode);
aac00a8d 1051out:
24ac23ab 1052 return state;
1b370bc2
TM		 1053err_put_inode:
1054 iput(inode);
1055err:
1056 return ERR_PTR(ret);
24ac23ab
TM		 1057}
1058
864472e9
TM		 1059static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1060{
1061 struct nfs_inode *nfsi = NFS_I(state->inode);
1062 struct nfs_open_context *ctx;
1063
1064 spin_lock(&state->inode->i_lock);
1065 list_for_each_entry(ctx, &nfsi->open_files, list) {
1066 if (ctx->state != state)
1067 continue;
1068 get_nfs_open_context(ctx);
1069 spin_unlock(&state->inode->i_lock);
1070 return ctx;
1071 }
1072 spin_unlock(&state->inode->i_lock);
1073 return ERR_PTR(-ENOENT);
1074}
1075
6f220ed5
TM		 1076static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1077{
1078 struct nfs4_opendata *opendata;
1079
8535b2be 1080 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1081 if (opendata == NULL)
1082 return ERR_PTR(-ENOMEM);
1083 opendata->state = state;
1084 atomic_inc(&state->count);
1085 return opendata;
1086}
1087
dc0b027d 1088static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1089{
2ced46c2 1090 struct nfs4_state *newstate;
864472e9
TM		 1091 int ret;
1092
dc0b027d
TM		 1093 opendata->o_arg.open_flags = 0;
1094 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1095 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1096 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1097 nfs4_init_opendata_res(opendata);
b257957e 1098 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1099 if (ret != 0)
1100 return ret;
2ced46c2 1101 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1102 if (IS_ERR(newstate))
1103 return PTR_ERR(newstate);
dc0b027d 1104 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1105 *res = newstate;
864472e9
TM		 1106 return 0;
1107}
1108
1109static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1110{
864472e9 1111 struct nfs4_state *newstate;
864472e9
TM		 1112 int ret;
1113
1114 /* memory barrier prior to reading state->n_* */
2ced46c2 1115 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1116 smp_rmb();
1117 if (state->n_rdwr != 0) {
b0ed9dbc 1118 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1119 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1120 if (ret != 0)
1121 return ret;
2ced46c2
TM		 1122 if (newstate != state)
1123 return -ESTALE;
864472e9
TM		 1124 }
1125 if (state->n_wronly != 0) {
b0ed9dbc 1126 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1127 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1128 if (ret != 0)
1129 return ret;
2ced46c2
TM		 1130 if (newstate != state)
1131 return -ESTALE;
864472e9
TM		 1132 }
1133 if (state->n_rdonly != 0) {
b0ed9dbc 1134 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1135 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1136 if (ret != 0)
1137 return ret;
2ced46c2
TM		 1138 if (newstate != state)
1139 return -ESTALE;
864472e9 1140 }
1ac7e2fd
TM		 1141 /*
1142 * We may have performed cached opens for all three recoveries.
1143 * Check if we need to update the current stateid.
1144 */
1145 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1146 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1147 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1148 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1149 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1150 write_sequnlock(&state->seqlock);
1ac7e2fd 1151 }
864472e9
TM		 1152 return 0;
1153}
1154
1da177e4
LT		 1155/*
1156 * OPEN_RECLAIM:
1157 * reclaim state on the server after a reboot.
1da177e4 1158 */
539cd03a 1159static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1160{
1ac7e2fd 1161 struct nfs_delegation *delegation;
864472e9 1162 struct nfs4_opendata *opendata;
dc0b027d 1163 fmode_t delegation_type = 0;
1da177e4
LT		 1164 int status;
1165
6f220ed5
TM		 1166 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1167 if (IS_ERR(opendata))
1168 return PTR_ERR(opendata);
864472e9
TM		 1169 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1170 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1171 rcu_read_lock();
1172 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1173 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1174 delegation_type = delegation->type;
1ac7e2fd 1175 rcu_read_unlock();
864472e9
TM		 1176 opendata->o_arg.u.delegation_type = delegation_type;
1177 status = nfs4_open_recover(opendata, state);
c6d00e63 1178 nfs4_opendata_put(opendata);
1da177e4
LT		 1179 return status;
1180}
1181
539cd03a 1182static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1183{
1184 struct nfs_server *server = NFS_SERVER(state->inode);
1185 struct nfs4_exception exception = { };
1186 int err;
1187 do {
539cd03a 1188 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1189 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1190 break;
1191 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1192 } while (exception.retry);
1193 return err;
1194}
1195
864472e9
TM		 1196static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1197{
1198 struct nfs_open_context *ctx;
1199 int ret;
1200
1201 ctx = nfs4_state_find_open_context(state);
1202 if (IS_ERR(ctx))
1203 return PTR_ERR(ctx);
539cd03a 1204 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1205 put_nfs_open_context(ctx);
1206 return ret;
1207}
1208
13437e12 1209static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1210{
e56e0b78 1211 struct nfs4_opendata *opendata;
864472e9 1212 int ret;
1da177e4 1213
6f220ed5
TM		 1214 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1215 if (IS_ERR(opendata))
1216 return PTR_ERR(opendata);
e56e0b78 1217 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1218 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1219 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1220 ret = nfs4_open_recover(opendata, state);
c6d00e63 1221 nfs4_opendata_put(opendata);
864472e9 1222 return ret;
1da177e4
LT		 1223}
1224
13437e12 1225int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1226{
1227 struct nfs4_exception exception = { };
539cd03a 1228 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1229 int err;
1230 do {
13437e12 1231 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1232 switch (err) {
1233 case 0:
965b5d67
TM		 1234 case -ENOENT:
1235 case -ESTALE:
1236 goto out;
bcfa49f6
RL		 1237 case -NFS4ERR_BADSESSION:
1238 case -NFS4ERR_BADSLOT:
1239 case -NFS4ERR_BAD_HIGH_SLOT:
1240 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1241 case -NFS4ERR_DEADSESSION:
1242 nfs4_schedule_state_recovery(
1243 server->nfs_client);
1244 goto out;
1da177e4
LT		 1245 case -NFS4ERR_STALE_CLIENTID:
1246 case -NFS4ERR_STALE_STATEID:
1247 case -NFS4ERR_EXPIRED:
1248 /* Don't recall a delegation if it was lost */
7539bbab 1249 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1250 goto out;
1251 case -ERESTARTSYS:
1252 /*
1253 * The show must go on: exit, but mark the
1254 * stateid as needing recovery.
1255 */
1256 case -NFS4ERR_ADMIN_REVOKED:
1257 case -NFS4ERR_BAD_STATEID:
1258 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
168667c4
TM		 1259 case -EKEYEXPIRED:
1260 /*
1261 * User RPCSEC_GSS context has expired.
1262 * We cannot recover this stateid now, so
1263 * skip it and allow recovery thread to
1264 * proceed.
1265 */
965b5d67
TM		 1266 case -ENOMEM:
1267 err = 0;
1268 goto out;
1da177e4
LT		 1269 }
1270 err = nfs4_handle_exception(server, err, &exception);
1271 } while (exception.retry);
965b5d67 1272out:
1da177e4
LT		 1273 return err;
1274}
1275
cdd4e68b
TM		 1276static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1277{
1278 struct nfs4_opendata *data = calldata;
1279
1280 data->rpc_status = task->tk_status;
26e976a8 1281 if (data->rpc_status == 0) {
cdd4e68b
TM		 1282 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1283 sizeof(data->o_res.stateid.data));
bb22629e 1284 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1285 renew_lease(data->o_res.server, data->timestamp);
3e309914 1286 data->rpc_done = 1;
26e976a8 1287 }
cdd4e68b
TM		 1288}
1289
1290static void nfs4_open_confirm_release(void *calldata)
1291{
1292 struct nfs4_opendata *data = calldata;
1293 struct nfs4_state *state = NULL;
1294
1295 /* If this request hasn't been cancelled, do nothing */
1296 if (data->cancelled == 0)
1297 goto out_free;
1298 /* In case of error, no cleanup! */
3e309914 1299 if (!data->rpc_done)
cdd4e68b 1300 goto out_free;
cdd4e68b 1301 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1302 if (!IS_ERR(state))
dc0b027d 1303 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1304out_free:
c6d00e63 1305 nfs4_opendata_put(data);
cdd4e68b
TM		 1306}
1307
1308static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1309 .rpc_call_done = nfs4_open_confirm_done,
1310 .rpc_release = nfs4_open_confirm_release,
1311};
1312
1313/*
1314 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1315 */
1316static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1317{
1318 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1319 struct rpc_task *task;
5138fde0
TM		 1320 struct rpc_message msg = {
1321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1322 .rpc_argp = &data->c_arg,
1323 .rpc_resp = &data->c_res,
1324 .rpc_cred = data->owner->so_cred,
1325 };
c970aa85
TM		 1326 struct rpc_task_setup task_setup_data = {
1327 .rpc_client = server->client,
5138fde0 1328 .rpc_message = &msg,
c970aa85
TM		 1329 .callback_ops = &nfs4_open_confirm_ops,
1330 .callback_data = data,
101070ca 1331 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1332 .flags = RPC_TASK_ASYNC,
1333 };
1da177e4
LT		 1334 int status;
1335
c6d00e63 1336 kref_get(&data->kref);
3e309914
TM		 1337 data->rpc_done = 0;
1338 data->rpc_status = 0;
5138fde0 1339 data->timestamp = jiffies;
c970aa85 1340 task = rpc_run_task(&task_setup_data);
7a1218a2 1341 if (IS_ERR(task))
cdd4e68b 1342 return PTR_ERR(task);
cdd4e68b
TM		 1343 status = nfs4_wait_for_completion_rpc_task(task);
1344 if (status != 0) {
1345 data->cancelled = 1;
1346 smp_wmb();
1347 } else
1348 status = data->rpc_status;
e6b3c4db 1349 rpc_put_task(task);
1da177e4
LT		 1350 return status;
1351}
1352
24ac23ab 1353static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1354{
24ac23ab
TM		 1355 struct nfs4_opendata *data = calldata;
1356 struct nfs4_state_owner *sp = data->owner;
5138fde0 1357
24ac23ab
TM		 1358 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1359 return;
aac00a8d
TM		 1360 /*
1361 * Check if we still need to send an OPEN call, or if we can use
1362 * a delegation instead.
1363 */
1364 if (data->state != NULL) {
1365 struct nfs_delegation *delegation;
1366
dc0b027d 1367 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1368 goto out_no_action;
aac00a8d
TM		 1369 rcu_read_lock();
1370 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1371 if (delegation != NULL &&
15c831bf 1372 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1373 rcu_read_unlock();
6ee41268 1374 goto out_no_action;
aac00a8d
TM		 1375 }
1376 rcu_read_unlock();
1377 }
24ac23ab 1378 /* Update sequence id. */
9f958ab8 1379 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1380 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1381 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1382 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1383 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1384 }
26e976a8 1385 data->timestamp = jiffies;
035168ab 1386 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1387 &data->o_arg.seq_args,
1388 &data->o_res.seq_res, 1, task))
1389 return;
5138fde0 1390 rpc_call_start(task);
6ee41268
TM		 1391 return;
1392out_no_action:
1393 task->tk_action = NULL;
1394
24ac23ab 1395}
1da177e4 1396
b257957e
AB		 1397static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1398{
1399 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1400 nfs4_open_prepare(task, calldata);
1401}
1402
24ac23ab
TM		 1403static void nfs4_open_done(struct rpc_task *task, void *calldata)
1404{
1405 struct nfs4_opendata *data = calldata;
1da177e4 1406
24ac23ab 1407 data->rpc_status = task->tk_status;
d898528c 1408
14516c3a
TM		 1409 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1410 return;
d898528c 1411
24ac23ab
TM		 1412 if (task->tk_status == 0) {
1413 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1414 case S_IFREG:
1415 break;
1416 case S_IFLNK:
24ac23ab 1417 data->rpc_status = -ELOOP;
6f926b5b
TM		 1418 break;
1419 case S_IFDIR:
24ac23ab 1420 data->rpc_status = -EISDIR;
6f926b5b
TM		 1421 break;
1422 default:
24ac23ab 1423 data->rpc_status = -ENOTDIR;
6f926b5b 1424 }
26e976a8 1425 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1426 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1427 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1428 }
3e309914 1429 data->rpc_done = 1;
24ac23ab 1430}
6f926b5b 1431
24ac23ab
TM		 1432static void nfs4_open_release(void *calldata)
1433{
1434 struct nfs4_opendata *data = calldata;
1435 struct nfs4_state *state = NULL;
1436
1437 /* If this request hasn't been cancelled, do nothing */
1438 if (data->cancelled == 0)
1439 goto out_free;
1440 /* In case of error, no cleanup! */
3e309914 1441 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1442 goto out_free;
1443 /* In case we need an open_confirm, no cleanup! */
1444 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1445 goto out_free;
24ac23ab 1446 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1447 if (!IS_ERR(state))
dc0b027d 1448 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1449out_free:
c6d00e63 1450 nfs4_opendata_put(data);
24ac23ab
TM		 1451}
1452
1453static const struct rpc_call_ops nfs4_open_ops = {
1454 .rpc_call_prepare = nfs4_open_prepare,
1455 .rpc_call_done = nfs4_open_done,
1456 .rpc_release = nfs4_open_release,
1457};
1458
b257957e
AB		 1459static const struct rpc_call_ops nfs4_recover_open_ops = {
1460 .rpc_call_prepare = nfs4_recover_open_prepare,
1461 .rpc_call_done = nfs4_open_done,
1462 .rpc_release = nfs4_open_release,
1463};
1464
1465static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1466{
1467 struct inode *dir = data->dir->d_inode;
1468 struct nfs_server *server = NFS_SERVER(dir);
1469 struct nfs_openargs *o_arg = &data->o_arg;
1470 struct nfs_openres *o_res = &data->o_res;
1471 struct rpc_task *task;
5138fde0
TM		 1472 struct rpc_message msg = {
1473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1474 .rpc_argp = o_arg,
1475 .rpc_resp = o_res,
1476 .rpc_cred = data->owner->so_cred,
1477 };
c970aa85
TM		 1478 struct rpc_task_setup task_setup_data = {
1479 .rpc_client = server->client,
5138fde0 1480 .rpc_message = &msg,
c970aa85
TM		 1481 .callback_ops = &nfs4_open_ops,
1482 .callback_data = data,
101070ca 1483 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1484 .flags = RPC_TASK_ASYNC,
1485 };
24ac23ab
TM		 1486 int status;
1487
c6d00e63 1488 kref_get(&data->kref);
3e309914
TM		 1489 data->rpc_done = 0;
1490 data->rpc_status = 0;
2ced46c2 1491 data->cancelled = 0;
b257957e
AB		 1492 if (isrecover)
1493 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1494 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1495 if (IS_ERR(task))
1496 return PTR_ERR(task);
1497 status = nfs4_wait_for_completion_rpc_task(task);
1498 if (status != 0) {
1499 data->cancelled = 1;
1500 smp_wmb();
1501 } else
1502 status = data->rpc_status;
1503 rpc_put_task(task);
1504
1505 return status;
1506}
1507
1508static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1509{
1510 struct inode *dir = data->dir->d_inode;
1511 struct nfs_openres *o_res = &data->o_res;
1512 int status;
1513
1514 status = nfs4_run_open_task(data, 1);
1515 if (status != 0 || !data->rpc_done)
1516 return status;
1517
1518 nfs_refresh_inode(dir, o_res->dir_attr);
1519
1520 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1521 status = _nfs4_proc_open_confirm(data);
1522 if (status != 0)
1523 return status;
1524 }
1525
1526 return status;
1527}
1528
1529/*
1530 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1531 */
1532static int _nfs4_proc_open(struct nfs4_opendata *data)
1533{
1534 struct inode *dir = data->dir->d_inode;
1535 struct nfs_server *server = NFS_SERVER(dir);
1536 struct nfs_openargs *o_arg = &data->o_arg;
1537 struct nfs_openres *o_res = &data->o_res;
1538 int status;
1539
1540 status = nfs4_run_open_task(data, 0);
3e309914 1541 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1542 return status;
1543
56ae19f3
TM		 1544 if (o_arg->open_flags & O_CREAT) {
1545 update_changeattr(dir, &o_res->cinfo);
1546 nfs_post_op_update_inode(dir, o_res->dir_attr);
1547 } else
1548 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1549 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1550 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1551 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1552 status = _nfs4_proc_open_confirm(data);
1da177e4 1553 if (status != 0)
24ac23ab 1554 return status;
1da177e4
LT		 1555 }
1556 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1557 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1558 return 0;
1da177e4
LT		 1559}
1560
10afec90 1561static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1562{
7539bbab 1563 struct nfs_client *clp = server->nfs_client;
a78cb57a 1564 unsigned int loop;
6b30954e 1565 int ret;
58d9714a 1566
a78cb57a 1567 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1568 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1569 if (ret != 0)
a78cb57a 1570 break;
e598d843
TM		 1571 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1572 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1573 break;
58d9714a 1574 nfs4_schedule_state_recovery(clp);
a78cb57a 1575 ret = -EIO;
6b30954e 1576 }
a78cb57a 1577 return ret;
58d9714a
TM		 1578}
1579
1da177e4
LT		 1580/*
1581 * OPEN_EXPIRED:
1582 * reclaim state on the server after a network partition.
1583 * Assumes caller holds the appropriate lock
1584 */
539cd03a 1585static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1586{
e56e0b78 1587 struct nfs4_opendata *opendata;
864472e9 1588 int ret;
1da177e4 1589
6f220ed5
TM		 1590 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1591 if (IS_ERR(opendata))
1592 return PTR_ERR(opendata);
864472e9 1593 ret = nfs4_open_recover(opendata, state);
35d05778 1594 if (ret == -ESTALE)
539cd03a 1595 d_drop(ctx->path.dentry);
c6d00e63 1596 nfs4_opendata_put(opendata);
864472e9 1597 return ret;
1da177e4
LT		 1598}
1599
a9ed2e25 1600static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1601{
539cd03a 1602 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1603 struct nfs4_exception exception = { };
1604 int err;
1605
1606 do {
539cd03a 1607 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1608 switch (err) {
1609 default:
1610 goto out;
1611 case -NFS4ERR_GRACE:
1612 case -NFS4ERR_DELAY:
1613 nfs4_handle_exception(server, err, &exception);
1614 err = 0;
1615 }
202b50dc 1616 } while (exception.retry);
a9ed2e25 1617out:
202b50dc
TM		 1618 return err;
1619}
1620
1da177e4
LT		 1621static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1622{
1da177e4 1623 struct nfs_open_context *ctx;
864472e9 1624 int ret;
1da177e4 1625
864472e9
TM		 1626 ctx = nfs4_state_find_open_context(state);
1627 if (IS_ERR(ctx))
1628 return PTR_ERR(ctx);
539cd03a 1629 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1630 put_nfs_open_context(ctx);
1631 return ret;
1da177e4
LT		 1632}
1633
aa53ed54
JL		 1634/*
1635 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1636 * fields corresponding to attributes that were used to store the verifier.
1637 * Make sure we clobber those fields in the later setattr call
1638 */
1639static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1640{
1641 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1642 !(sattr->ia_valid & ATTR_ATIME_SET))
1643 sattr->ia_valid |= ATTR_ATIME;
1644
1645 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1646 !(sattr->ia_valid & ATTR_MTIME_SET))
1647 sattr->ia_valid |= ATTR_MTIME;
1648}
1649
1da177e4 1650/*
24ac23ab 1651 * Returns a referenced nfs4_state
1da177e4 1652 */
dc0b027d 1653static 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		 1654{
1655 struct nfs4_state_owner *sp;
1656 struct nfs4_state *state = NULL;
1657 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1658 struct nfs4_opendata *opendata;
aac00a8d 1659 int status;
1da177e4
LT		 1660
1661 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1662 status = -ENOMEM;
1663 if (!(sp = nfs4_get_state_owner(server, cred))) {
1664 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1665 goto out_err;
1666 }
58d9714a
TM		 1667 status = nfs4_recover_expired_lease(server);
1668 if (status != 0)
b4454fe1 1669 goto err_put_state_owner;
aac00a8d 1670 if (path->dentry->d_inode != NULL)
dc0b027d 1671 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1672 status = -ENOMEM;
8535b2be 1673 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1674 if (opendata == NULL)
95d35cb4 1675 goto err_put_state_owner;
1da177e4 1676
aac00a8d
TM		 1677 if (path->dentry->d_inode != NULL)
1678 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1679
24ac23ab 1680 status = _nfs4_proc_open(opendata);
1da177e4 1681 if (status != 0)
c6d00e63 1682 goto err_opendata_put;
1da177e4 1683
24ac23ab 1684 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1685 status = PTR_ERR(state);
1686 if (IS_ERR(state))
c6d00e63 1687 goto err_opendata_put;
0df5dd4a 1688 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1689 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1690
1691 if (opendata->o_arg.open_flags & O_EXCL) {
1692 nfs4_exclusive_attrset(opendata, sattr);
1693
1694 nfs_fattr_init(opendata->o_res.f_attr);
1695 status = nfs4_do_setattr(state->inode, cred,
1696 opendata->o_res.f_attr, sattr,
1697 state);
1698 if (status == 0)
1699 nfs_setattr_update_inode(state->inode, sattr);
1700 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1701 }
c6d00e63 1702 nfs4_opendata_put(opendata);
1da177e4 1703 nfs4_put_state_owner(sp);
1da177e4
LT		 1704 *res = state;
1705 return 0;
c6d00e63
TM		 1706err_opendata_put:
1707 nfs4_opendata_put(opendata);
e56e0b78
TM		 1708err_put_state_owner:
1709 nfs4_put_state_owner(sp);
1da177e4 1710out_err:
1da177e4
LT		 1711 *res = NULL;
1712 return status;
1713}
1714
1715
dc0b027d 1716static 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		 1717{
1718 struct nfs4_exception exception = { };
1719 struct nfs4_state *res;
1720 int status;
1721
1722 do {
dc0b027d 1723 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1724 if (status == 0)
1725 break;
1726 /* NOTE: BAD_SEQID means the server and client disagree about the
1727 * book-keeping w.r.t. state-changing operations
1728 * (OPEN/CLOSE/LOCK/LOCKU...)
1729 * It is actually a sign of a bug on the client or on the server.
1730 *
1731 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1732 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1733 * have unhashed the old state_owner for us, and that we can
1734 * therefore safely retry using a new one. We should still warn
1735 * the user though...
1736 */
1737 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1738 printk(KERN_WARNING "NFS: v4 server %s "
1739 " returned a bad sequence-id error!\n",
1740 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1741 exception.retry = 1;
1742 continue;
1743 }
550f5747
TM		 1744 /*
1745 * BAD_STATEID on OPEN means that the server cancelled our
1746 * state before it received the OPEN_CONFIRM.
1747 * Recover by retrying the request as per the discussion
1748 * on Page 181 of RFC3530.
1749 */
1750 if (status == -NFS4ERR_BAD_STATEID) {
1751 exception.retry = 1;
1752 continue;
1753 }
aac00a8d
TM		 1754 if (status == -EAGAIN) {
1755 /* We must have found a delegation */
1756 exception.retry = 1;
1757 continue;
1758 }
1da177e4
LT		 1759 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1760 status, &exception));
1761 } while (exception.retry);
1762 return res;
1763}
1764
659bfcd6
TM		 1765static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1766 struct nfs_fattr *fattr, struct iattr *sattr,
1767 struct nfs4_state *state)
1da177e4 1768{
3e4f6290 1769 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1770 struct nfs_setattrargs arg = {
3e4f6290 1771 .fh = NFS_FH(inode),
1da177e4
LT		 1772 .iap = sattr,
1773 .server = server,
1774 .bitmask = server->attr_bitmask,
1775 };
1776 struct nfs_setattrres res = {
1777 .fattr = fattr,
1778 .server = server,
1779 };
1780 struct rpc_message msg = {
659bfcd6
TM		 1781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1782 .rpc_argp = &arg,
1783 .rpc_resp = &res,
1784 .rpc_cred = cred,
1da177e4 1785 };
26e976a8 1786 unsigned long timestamp = jiffies;
65e4308d 1787 int status;
1da177e4 1788
0e574af1 1789 nfs_fattr_init(fattr);
1da177e4 1790
3e4f6290
TM		 1791 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1792 /* Use that stateid */
1793 } else if (state != NULL) {
77041ed9 1794 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1795 } else
1da177e4
LT		 1796 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1797
cccef3b9 1798 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1799 if (status == 0 && state != NULL)
1800 renew_lease(server, timestamp);
65e4308d 1801 return status;
1da177e4
LT		 1802}
1803
659bfcd6
TM		 1804static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1805 struct nfs_fattr *fattr, struct iattr *sattr,
1806 struct nfs4_state *state)
1da177e4 1807{
3e4f6290 1808 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1809 struct nfs4_exception exception = { };
1810 int err;
1811 do {
1812 err = nfs4_handle_exception(server,
659bfcd6 1813 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1814 &exception);
1815 } while (exception.retry);
1816 return err;
1817}
1818
1819struct nfs4_closedata {
4a35bd41 1820 struct path path;
1da177e4
LT		 1821 struct inode *inode;
1822 struct nfs4_state *state;
1823 struct nfs_closeargs arg;
1824 struct nfs_closeres res;
516a6af6 1825 struct nfs_fattr fattr;
26e976a8 1826 unsigned long timestamp;
1da177e4
LT		 1827};
1828
963d8fe5 1829static void nfs4_free_closedata(void *data)
9512135d 1830{
963d8fe5
TM		 1831 struct nfs4_closedata *calldata = data;
1832 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1833
1834 nfs4_put_open_state(calldata->state);
1835 nfs_free_seqid(calldata->arg.seqid);
9512135d 1836 nfs4_put_state_owner(sp);
31f31db1 1837 path_put(&calldata->path);
9512135d
TM		 1838 kfree(calldata);
1839}
1840
88069f77
TM		 1841static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1842 fmode_t fmode)
1843{
1844 spin_lock(&state->owner->so_lock);
1845 if (!(fmode & FMODE_READ))
1846 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1847 if (!(fmode & FMODE_WRITE))
1848 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1849 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1850 spin_unlock(&state->owner->so_lock);
1851}
1852
963d8fe5 1853static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1854{
963d8fe5 1855 struct nfs4_closedata *calldata = data;
1da177e4 1856 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1857 struct nfs_server *server = NFS_SERVER(calldata->inode);
1858
14516c3a
TM		 1859 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1860 return;
1da177e4
LT		 1861 /* hmm. we are done with the inode, and in the process of freeing
1862 * the state_owner. we keep this around to process errors
1863 */
1da177e4
LT		 1864 switch (task->tk_status) {
1865 case 0:
45328c35 1866 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1867 renew_lease(server, calldata->timestamp);
88069f77
TM		 1868 nfs4_close_clear_stateid_flags(state,
1869 calldata->arg.fmode);
1da177e4
LT		 1870 break;
1871 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1872 case -NFS4ERR_OLD_STATEID:
1873 case -NFS4ERR_BAD_STATEID:
1da177e4 1874 case -NFS4ERR_EXPIRED:
dc0b027d 1875 if (calldata->arg.fmode == 0)
9e33bed5 1876 break;
1da177e4 1877 default:
72211dbe
TM		 1878 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1879 rpc_restart_call_prepare(task);
1da177e4 1880 }
72211dbe 1881 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1882 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1883}
1884
4ce70ada 1885static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1886{
4ce70ada 1887 struct nfs4_closedata *calldata = data;
9512135d 1888 struct nfs4_state *state = calldata->state;
88069f77 1889 int call_close = 0;
9512135d 1890
963d8fe5 1891 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1892 return;
003707c7 1893
88069f77
TM		 1894 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1895 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1896 spin_lock(&state->owner->so_lock);
003707c7 1897 /* Calculate the change in open mode */
e7616923 1898 if (state->n_rdwr == 0) {
003707c7 1899 if (state->n_rdonly == 0) {
88069f77
TM		 1900 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1901 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1902 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1903 }
1904 if (state->n_wronly == 0) {
88069f77
TM		 1905 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1906 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1907 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1908 }
e7616923 1909 }
4cecb76f 1910 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1911
1912 if (!call_close) {
963d8fe5
TM		 1913 /* Note: exit _without_ calling nfs4_close_done */
1914 task->tk_action = NULL;
9512135d
TM		 1915 return;
1916 }
88069f77
TM		 1917
1918 if (calldata->arg.fmode == 0)
1919 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1920
516a6af6 1921 nfs_fattr_init(calldata->res.fattr);
26e976a8 1922 calldata->timestamp = jiffies;
035168ab 1923 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1924 &calldata->arg.seq_args, &calldata->res.seq_res,
1925 1, task))
1926 return;
5138fde0 1927 rpc_call_start(task);
1da177e4
LT		 1928}
1929
963d8fe5 1930static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1931 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1932 .rpc_call_done = nfs4_close_done,
1933 .rpc_release = nfs4_free_closedata,
1934};
1935
1da177e4
LT		 1936/*
1937 * It is possible for data to be read/written from a mem-mapped file
1938 * after the sys_close call (which hits the vfs layer as a flush).
1939 * This means that we can't safely call nfsv4 close on a file until
1940 * the inode is cleared. This in turn means that we are not good
1941 * NFSv4 citizens - we do not indicate to the server to update the file's
1942 * share state even when we are done with one of the three share
1943 * stateid's in the inode.
1944 *
1945 * NOTE: Caller must be holding the sp->so_owner semaphore!
1946 */
8535b2be 1947int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 1948{
4a35bd41 1949 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1950 struct nfs4_closedata *calldata;
b39e625b
TM		 1951 struct nfs4_state_owner *sp = state->owner;
1952 struct rpc_task *task;
5138fde0
TM		 1953 struct rpc_message msg = {
1954 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1955 .rpc_cred = state->owner->so_cred,
1956 };
c970aa85
TM		 1957 struct rpc_task_setup task_setup_data = {
1958 .rpc_client = server->client,
5138fde0 1959 .rpc_message = &msg,
c970aa85 1960 .callback_ops = &nfs4_close_ops,
101070ca 1961 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1962 .flags = RPC_TASK_ASYNC,
1963 };
9512135d 1964 int status = -ENOMEM;
1da177e4 1965
8535b2be 1966 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 1967 if (calldata == NULL)
9512135d 1968 goto out;
4a35bd41 1969 calldata->inode = state->inode;
1da177e4 1970 calldata->state = state;
4a35bd41 1971 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1972 calldata->arg.stateid = &state->open_stateid;
1da177e4 1973 /* Serialization for the sequence id */
8535b2be 1974 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 1975 if (calldata->arg.seqid == NULL)
1976 goto out_free_calldata;
dc0b027d 1977 calldata->arg.fmode = 0;
a65318bf 1978 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1979 calldata->res.fattr = &calldata->fattr;
c1d51931 1980 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1981 calldata->res.server = server;
f6948697
AV		 1982 path_get(path);
1983 calldata->path = *path;
9512135d 1984
5138fde0
TM		 1985 msg.rpc_argp = &calldata->arg,
1986 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1987 task_setup_data.callback_data = calldata;
1988 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1989 if (IS_ERR(task))
1990 return PTR_ERR(task);
a49c3c77
TM		 1991 status = 0;
1992 if (wait)
1993 status = rpc_wait_for_completion_task(task);
b39e625b 1994 rpc_put_task(task);
a49c3c77 1995 return status;
9512135d
TM		 1996out_free_calldata:
1997 kfree(calldata);
1998out:
b39e625b
TM		 1999 nfs4_put_open_state(state);
2000 nfs4_put_state_owner(sp);
9512135d 2001 return status;
1da177e4
LT		 2002}
2003
2b484297 2004static struct inode *
cd9a1c0e 2005nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2006{
1da177e4 2007 struct nfs4_state *state;
1da177e4 2008
565277f6 2009 /* Protect against concurrent sillydeletes */
cd9a1c0e 2010 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2011 if (IS_ERR(state))
2012 return ERR_CAST(state);
cd9a1c0e 2013 ctx->state = state;
f46e0bd3 2014 return igrab(state->inode);
1da177e4
LT		 2015}
2016
1185a552 2017static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2018{
2019 if (ctx->state == NULL)
2020 return;
2021 if (is_sync)
2022 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2023 else
2024 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2025}
1da177e4
LT		 2026
2027static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2028{
43652ad5
BH		 2029 struct nfs4_server_caps_arg args = {
2030 .fhandle = fhandle,
2031 };
1da177e4
LT		 2032 struct nfs4_server_caps_res res = {};
2033 struct rpc_message msg = {
2034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2035 .rpc_argp = &args,
1da177e4
LT		 2036 .rpc_resp = &res,
2037 };
2038 int status;
2039
cccef3b9 2040 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2041 if (status == 0) {
2042 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2043 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2044 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2045 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2046 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2047 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2048 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2049 server->caps |= NFS_CAP_ACLS;
2050 if (res.has_links != 0)
2051 server->caps |= NFS_CAP_HARDLINKS;
2052 if (res.has_symlinks != 0)
2053 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2054 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2055 server->caps |= NFS_CAP_FILEID;
2056 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2057 server->caps |= NFS_CAP_MODE;
2058 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2059 server->caps |= NFS_CAP_NLINK;
2060 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2061 server->caps |= NFS_CAP_OWNER;
2062 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2063 server->caps |= NFS_CAP_OWNER_GROUP;
2064 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2065 server->caps |= NFS_CAP_ATIME;
2066 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2067 server->caps |= NFS_CAP_CTIME;
2068 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2069 server->caps |= NFS_CAP_MTIME;
2070
a65318bf
TM		 2071 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2072 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2073 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2074 server->acl_bitmask = res.acl_bitmask;
2075 }
cccef3b9 2076
1da177e4
LT		 2077 return status;
2078}
2079
55a97593 2080int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2081{
2082 struct nfs4_exception exception = { };
2083 int err;
2084 do {
2085 err = nfs4_handle_exception(server,
2086 _nfs4_server_capabilities(server, fhandle),
2087 &exception);
2088 } while (exception.retry);
2089 return err;
2090}
2091
2092static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2093 struct nfs_fsinfo *info)
2094{
1da177e4
LT		 2095 struct nfs4_lookup_root_arg args = {
2096 .bitmask = nfs4_fattr_bitmap,
2097 };
2098 struct nfs4_lookup_res res = {
2099 .server = server,
0e574af1 2100 .fattr = info->fattr,
1da177e4
LT		 2101 .fh = fhandle,
2102 };
2103 struct rpc_message msg = {
2104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2105 .rpc_argp = &args,
2106 .rpc_resp = &res,
2107 };
008f55d0 2108
0e574af1 2109 nfs_fattr_init(info->fattr);
fccba804 2110 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2111}
2112
2113static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2114 struct nfs_fsinfo *info)
2115{
2116 struct nfs4_exception exception = { };
2117 int err;
2118 do {
2119 err = nfs4_handle_exception(server,
2120 _nfs4_lookup_root(server, fhandle, info),
2121 &exception);
2122 } while (exception.retry);
2123 return err;
2124}
2125
54ceac45
DH		 2126/*
2127 * get the file handle for the "/" directory on the server
2128 */
1da177e4 2129static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2130 struct nfs_fsinfo *info)
1da177e4 2131{
1da177e4
LT		 2132 int status;
2133
1da177e4 2134 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2135 if (status == 0)
2136 status = nfs4_server_capabilities(server, fhandle);
2137 if (status == 0)
2138 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2139 return nfs4_map_errors(status);
1da177e4
LT		 2140}
2141
6b97fd3d
MN		 2142/*
2143 * Get locations and (maybe) other attributes of a referral.
2144 * Note that we'll actually follow the referral later when
2145 * we detect fsid mismatch in inode revalidation
2146 */
56659e99 2147static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2148{
2149 int status = -ENOMEM;
2150 struct page *page = NULL;
2151 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2152
2153 page = alloc_page(GFP_KERNEL);
2154 if (page == NULL)
2155 goto out;
2156 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2157 if (locations == NULL)
2158 goto out;
2159
c228fd3a 2160 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2161 if (status != 0)
2162 goto out;
2163 /* Make sure server returned a different fsid for the referral */
2164 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2165 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2166 status = -EIO;
2167 goto out;
2168 }
2169
2170 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2171 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2172 if (!fattr->mode)
2173 fattr->mode = S_IFDIR;
2174 memset(fhandle, 0, sizeof(struct nfs_fh));
2175out:
2176 if (page)
2177 __free_page(page);
5d7ca35a 2178 kfree(locations);
6b97fd3d
MN		 2179 return status;
2180}
2181
1da177e4
LT		 2182static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2183{
2184 struct nfs4_getattr_arg args = {
2185 .fh = fhandle,
2186 .bitmask = server->attr_bitmask,
2187 };
2188 struct nfs4_getattr_res res = {
2189 .fattr = fattr,
2190 .server = server,
2191 };
2192 struct rpc_message msg = {
2193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2194 .rpc_argp = &args,
2195 .rpc_resp = &res,
2196 };
2197
0e574af1 2198 nfs_fattr_init(fattr);
cccef3b9 2199 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2200}
2201
2202static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2203{
2204 struct nfs4_exception exception = { };
2205 int err;
2206 do {
2207 err = nfs4_handle_exception(server,
2208 _nfs4_proc_getattr(server, fhandle, fattr),
2209 &exception);
2210 } while (exception.retry);
2211 return err;
2212}
2213
2214/*
2215 * The file is not closed if it is opened due to the a request to change
2216 * the size of the file. The open call will not be needed once the
2217 * VFS layer lookup-intents are implemented.
2218 *
2219 * Close is called when the inode is destroyed.
2220 * If we haven't opened the file for O_WRONLY, we
2221 * need to in the size_change case to obtain a stateid.
2222 *
2223 * Got race?
2224 * Because OPEN is always done by name in nfsv4, it is
2225 * possible that we opened a different file by the same
2226 * name. We can recognize this race condition, but we
2227 * can't do anything about it besides returning an error.
2228 *
2229 * This will be fixed with VFS changes (lookup-intent).
2230 */
2231static int
2232nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2233 struct iattr *sattr)
2234{
08e9eac4 2235 struct inode *inode = dentry->d_inode;
659bfcd6 2236 struct rpc_cred *cred = NULL;
d530838b 2237 struct nfs4_state *state = NULL;
1da177e4
LT		 2238 int status;
2239
0e574af1 2240 nfs_fattr_init(fattr);
1da177e4 2241
d530838b 2242 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2243 if (sattr->ia_valid & ATTR_FILE) {
2244 struct nfs_open_context *ctx;
2245
2246 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2247 if (ctx) {
2248 cred = ctx->cred;
2249 state = ctx->state;
2250 }
659bfcd6 2251 }
08e9eac4 2252
659bfcd6 2253 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2254 if (status == 0)
2255 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2256 return status;
2257}
2258
56659e99
TM		 2259static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2260 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2261 struct nfs_fattr *fattr)
2262{
2263 int status;
2264 struct nfs4_lookup_arg args = {
2265 .bitmask = server->attr_bitmask,
2266 .dir_fh = dirfh,
2267 .name = name,
2268 };
2269 struct nfs4_lookup_res res = {
2270 .server = server,
2271 .fattr = fattr,
2272 .fh = fhandle,
2273 };
2274 struct rpc_message msg = {
2275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2276 .rpc_argp = &args,
2277 .rpc_resp = &res,
2278 };
2279
2280 nfs_fattr_init(fattr);
2281
2282 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2283 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2284 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2285 return status;
2286}
2287
2288static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2289 struct qstr *name, struct nfs_fh *fhandle,
2290 struct nfs_fattr *fattr)
2291{
2292 struct nfs4_exception exception = { };
2293 int err;
2294 do {
4e56e082
TM		 2295 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2296 /* FIXME: !!!! */
2297 if (err == -NFS4ERR_MOVED) {
2298 err = -EREMOTE;
2299 break;
2300 }
2301 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2302 } while (exception.retry);
2303 return err;
2304}
2305
56659e99 2306static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2307 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2308{
4e56e082 2309 int status;
1da177e4
LT		 2310
2311 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2312 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2313 if (status == -NFS4ERR_MOVED)
2314 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2315 dprintk("NFS reply lookup: %d\n", status);
2316 return status;
2317}
2318
2319static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2320{
2321 struct nfs4_exception exception = { };
2322 int err;
2323 do {
2324 err = nfs4_handle_exception(NFS_SERVER(dir),
2325 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2326 &exception);
2327 } while (exception.retry);
2328 return err;
2329}
2330
2331static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2332{
76b32999 2333 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2334 struct nfs4_accessargs args = {
2335 .fh = NFS_FH(inode),
76b32999
TM		 2336 .bitmask = server->attr_bitmask,
2337 };
2338 struct nfs4_accessres res = {
2339 .server = server,
1da177e4 2340 };
1da177e4
LT		 2341 struct rpc_message msg = {
2342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2343 .rpc_argp = &args,
2344 .rpc_resp = &res,
2345 .rpc_cred = entry->cred,
2346 };
2347 int mode = entry->mask;
2348 int status;
2349
2350 /*
2351 * Determine which access bits we want to ask for...
2352 */
2353 if (mode & MAY_READ)
2354 args.access |= NFS4_ACCESS_READ;
2355 if (S_ISDIR(inode->i_mode)) {
2356 if (mode & MAY_WRITE)
2357 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2358 if (mode & MAY_EXEC)
2359 args.access |= NFS4_ACCESS_LOOKUP;
2360 } else {
2361 if (mode & MAY_WRITE)
2362 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2363 if (mode & MAY_EXEC)
2364 args.access |= NFS4_ACCESS_EXECUTE;
2365 }
c407d41a
TM		 2366
2367 res.fattr = nfs_alloc_fattr();
2368 if (res.fattr == NULL)
2369 return -ENOMEM;
2370
cccef3b9 2371 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2372 if (!status) {
2373 entry->mask = 0;
2374 if (res.access & NFS4_ACCESS_READ)
2375 entry->mask |= MAY_READ;
2376 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2377 entry->mask |= MAY_WRITE;
2378 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2379 entry->mask |= MAY_EXEC;
c407d41a 2380 nfs_refresh_inode(inode, res.fattr);
1da177e4 2381 }
c407d41a 2382 nfs_free_fattr(res.fattr);
1da177e4
LT		 2383 return status;
2384}
2385
2386static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2387{
2388 struct nfs4_exception exception = { };
2389 int err;
2390 do {
2391 err = nfs4_handle_exception(NFS_SERVER(inode),
2392 _nfs4_proc_access(inode, entry),
2393 &exception);
2394 } while (exception.retry);
2395 return err;
2396}
2397
2398/*
2399 * TODO: For the time being, we don't try to get any attributes
2400 * along with any of the zero-copy operations READ, READDIR,
2401 * READLINK, WRITE.
2402 *
2403 * In the case of the first three, we want to put the GETATTR
2404 * after the read-type operation -- this is because it is hard
2405 * to predict the length of a GETATTR response in v4, and thus
2406 * align the READ data correctly. This means that the GETATTR
2407 * may end up partially falling into the page cache, and we should
2408 * shift it into the 'tail' of the xdr_buf before processing.
2409 * To do this efficiently, we need to know the total length
2410 * of data received, which doesn't seem to be available outside
2411 * of the RPC layer.
2412 *
2413 * In the case of WRITE, we also want to put the GETATTR after
2414 * the operation -- in this case because we want to make sure
2415 * we get the post-operation mtime and size. This means that
2416 * we can't use xdr_encode_pages() as written: we need a variant
2417 * of it which would leave room in the 'tail' iovec.
2418 *
2419 * Both of these changes to the XDR layer would in fact be quite
2420 * minor, but I decided to leave them for a subsequent patch.
2421 */
2422static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2423 unsigned int pgbase, unsigned int pglen)
2424{
2425 struct nfs4_readlink args = {
2426 .fh = NFS_FH(inode),
2427 .pgbase = pgbase,
2428 .pglen = pglen,
2429 .pages = &page,
2430 };
f50c7000 2431 struct nfs4_readlink_res res;
1da177e4
LT		 2432 struct rpc_message msg = {
2433 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2434 .rpc_argp = &args,
f50c7000 2435 .rpc_resp = &res,
1da177e4
LT		 2436 };
2437
cccef3b9 2438 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2439}
2440
2441static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2442 unsigned int pgbase, unsigned int pglen)
2443{
2444 struct nfs4_exception exception = { };
2445 int err;
2446 do {
2447 err = nfs4_handle_exception(NFS_SERVER(inode),
2448 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2449 &exception);
2450 } while (exception.retry);
2451 return err;
2452}
2453
1da177e4
LT		 2454/*
2455 * Got race?
2456 * We will need to arrange for the VFS layer to provide an atomic open.
2457 * Until then, this create/open method is prone to inefficiency and race
2458 * conditions due to the lookup, create, and open VFS calls from sys_open()
2459 * placed on the wire.
2460 *
2461 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2462 * The file will be opened again in the subsequent VFS open call
2463 * (nfs4_proc_file_open).
2464 *
2465 * The open for read will just hang around to be used by any process that
2466 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2467 */
2468
2469static int
2470nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2471 int flags, struct nfs_open_context *ctx)
1da177e4 2472{
c0204fd2 2473 struct path my_path = {
ad389da7
TM		 2474 .dentry = dentry,
2475 };
c0204fd2 2476 struct path *path = &my_path;
1da177e4 2477 struct nfs4_state *state;
c0204fd2
TM		 2478 struct rpc_cred *cred = NULL;
2479 fmode_t fmode = 0;
1da177e4
LT		 2480 int status = 0;
2481
c0204fd2
TM		 2482 if (ctx != NULL) {
2483 cred = ctx->cred;
2484 path = &ctx->path;
2485 fmode = ctx->mode;
1da177e4 2486 }
c0204fd2 2487 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d4d9cdcb 2488 d_drop(dentry);
1da177e4
LT		 2489 if (IS_ERR(state)) {
2490 status = PTR_ERR(state);
c0204fd2 2491 goto out;
1da177e4 2492 }
d4d9cdcb 2493 d_add(dentry, igrab(state->inode));
d75340cc 2494 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2495 if (ctx != NULL)
2496 ctx->state = state;
02a913a7 2497 else
c0204fd2 2498 nfs4_close_sync(path, state, fmode);
1da177e4
LT		 2499out:
2500 return status;
2501}
2502
2503static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2504{
16e42959 2505 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2506 struct nfs_removeargs args = {
1da177e4 2507 .fh = NFS_FH(dir),
4fdc17b2
TM		 2508 .name.len = name->len,
2509 .name.name = name->name,
16e42959
TM		 2510 .bitmask = server->attr_bitmask,
2511 };
4fdc17b2 2512 struct nfs_removeres res = {
16e42959 2513 .server = server,
1da177e4 2514 };
1da177e4 2515 struct rpc_message msg = {
4fdc17b2
TM		 2516 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2517 .rpc_argp = &args,
2518 .rpc_resp = &res,
1da177e4 2519 };
d346890b
TM		 2520 int status = -ENOMEM;
2521
2522 res.dir_attr = nfs_alloc_fattr();
2523 if (res.dir_attr == NULL)
2524 goto out;
1da177e4 2525
cccef3b9 2526 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2527 if (status == 0) {
2528 update_changeattr(dir, &res.cinfo);
d346890b 2529 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2530 }
d346890b
TM		 2531 nfs_free_fattr(res.dir_attr);
2532out:
1da177e4
LT		 2533 return status;
2534}
2535
2536static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2537{
2538 struct nfs4_exception exception = { };
2539 int err;
2540 do {
2541 err = nfs4_handle_exception(NFS_SERVER(dir),
2542 _nfs4_proc_remove(dir, name),
2543 &exception);
2544 } while (exception.retry);
2545 return err;
2546}
2547
e4eff1a6 2548static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2549{
e4eff1a6
TM		 2550 struct nfs_server *server = NFS_SERVER(dir);
2551 struct nfs_removeargs *args = msg->rpc_argp;
2552 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2553
a65318bf 2554 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2555 res->server = server;
dfb4f309 2556 res->seq_res.sr_slot = NULL;
1da177e4 2557 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2558}
2559
e4eff1a6 2560static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2561{
e4eff1a6
TM		 2562 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2563
14516c3a
TM		 2564 if (!nfs4_sequence_done(task, &res->seq_res))
2565 return 0;
9e33bed5 2566 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2567 return 0;
2568 update_changeattr(dir, &res->cinfo);
d346890b 2569 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2570 return 1;
1da177e4
LT		 2571}
2572
d3d4152a
JL		 2573static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2574{
2575 struct nfs_server *server = NFS_SERVER(dir);
2576 struct nfs_renameargs *arg = msg->rpc_argp;
2577 struct nfs_renameres *res = msg->rpc_resp;
2578
2579 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2580 arg->bitmask = server->attr_bitmask;
2581 res->server = server;
2582}
2583
2584static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2585 struct inode *new_dir)
2586{
2587 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2588
2589 if (!nfs4_sequence_done(task, &res->seq_res))
2590 return 0;
2591 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2592 return 0;
2593
2594 update_changeattr(old_dir, &res->old_cinfo);
2595 nfs_post_op_update_inode(old_dir, res->old_fattr);
2596 update_changeattr(new_dir, &res->new_cinfo);
2597 nfs_post_op_update_inode(new_dir, res->new_fattr);
2598 return 1;
2599}
2600
1da177e4
LT		 2601static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2602 struct inode *new_dir, struct qstr *new_name)
2603{
6caf2c82 2604 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2605 struct nfs_renameargs arg = {
1da177e4
LT		 2606 .old_dir = NFS_FH(old_dir),
2607 .new_dir = NFS_FH(new_dir),
2608 .old_name = old_name,
2609 .new_name = new_name,
6caf2c82
TM		 2610 .bitmask = server->attr_bitmask,
2611 };
e8582a8b 2612 struct nfs_renameres res = {
6caf2c82 2613 .server = server,
1da177e4 2614 };
1da177e4
LT		 2615 struct rpc_message msg = {
2616 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2617 .rpc_argp = &arg,
2618 .rpc_resp = &res,
2619 };
011fff72 2620 int status = -ENOMEM;
1da177e4 2621
011fff72
TM		 2622 res.old_fattr = nfs_alloc_fattr();
2623 res.new_fattr = nfs_alloc_fattr();
2624 if (res.old_fattr == NULL || res.new_fattr == NULL)
2625 goto out;
1da177e4 2626
011fff72 2627 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2628 if (!status) {
2629 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2630 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2631 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2632 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2633 }
011fff72
TM		 2634out:
2635 nfs_free_fattr(res.new_fattr);
2636 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2637 return status;
2638}
2639
2640static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2641 struct inode *new_dir, struct qstr *new_name)
2642{
2643 struct nfs4_exception exception = { };
2644 int err;
2645 do {
2646 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2647 _nfs4_proc_rename(old_dir, old_name,
2648 new_dir, new_name),
2649 &exception);
2650 } while (exception.retry);
2651 return err;
2652}
2653
2654static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2655{
91ba2eee 2656 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2657 struct nfs4_link_arg arg = {
2658 .fh = NFS_FH(inode),
2659 .dir_fh = NFS_FH(dir),
2660 .name = name,
91ba2eee
TM		 2661 .bitmask = server->attr_bitmask,
2662 };
91ba2eee
TM		 2663 struct nfs4_link_res res = {
2664 .server = server,
1da177e4 2665 };
1da177e4
LT		 2666 struct rpc_message msg = {
2667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2668 .rpc_argp = &arg,
91ba2eee 2669 .rpc_resp = &res,
1da177e4 2670 };
136f2627
TM		 2671 int status = -ENOMEM;
2672
2673 res.fattr = nfs_alloc_fattr();
2674 res.dir_attr = nfs_alloc_fattr();
2675 if (res.fattr == NULL || res.dir_attr == NULL)
2676 goto out;
1da177e4 2677
cccef3b9 2678 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2679 if (!status) {
2680 update_changeattr(dir, &res.cinfo);
2681 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2682 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2683 }
136f2627
TM		 2684out:
2685 nfs_free_fattr(res.dir_attr);
2686 nfs_free_fattr(res.fattr);
1da177e4
LT		 2687 return status;
2688}
2689
2690static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2691{
2692 struct nfs4_exception exception = { };
2693 int err;
2694 do {
2695 err = nfs4_handle_exception(NFS_SERVER(inode),
2696 _nfs4_proc_link(inode, dir, name),
2697 &exception);
2698 } while (exception.retry);
2699 return err;
2700}
2701
57dc9a57
TM		 2702struct nfs4_createdata {
2703 struct rpc_message msg;
2704 struct nfs4_create_arg arg;
2705 struct nfs4_create_res res;
2706 struct nfs_fh fh;
2707 struct nfs_fattr fattr;
2708 struct nfs_fattr dir_fattr;
2709};
2710
2711static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2712 struct qstr *name, struct iattr *sattr, u32 ftype)
2713{
2714 struct nfs4_createdata *data;
2715
2716 data = kzalloc(sizeof(*data), GFP_KERNEL);
2717 if (data != NULL) {
2718 struct nfs_server *server = NFS_SERVER(dir);
2719
2720 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2721 data->msg.rpc_argp = &data->arg;
2722 data->msg.rpc_resp = &data->res;
2723 data->arg.dir_fh = NFS_FH(dir);
2724 data->arg.server = server;
2725 data->arg.name = name;
2726 data->arg.attrs = sattr;
2727 data->arg.ftype = ftype;
2728 data->arg.bitmask = server->attr_bitmask;
2729 data->res.server = server;
2730 data->res.fh = &data->fh;
2731 data->res.fattr = &data->fattr;
2732 data->res.dir_fattr = &data->dir_fattr;
2733 nfs_fattr_init(data->res.fattr);
2734 nfs_fattr_init(data->res.dir_fattr);
2735 }
2736 return data;
2737}
2738
2739static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2740{
cccef3b9
AA		 2741 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2742 &data->arg, &data->res, 1);
57dc9a57
TM		 2743 if (status == 0) {
2744 update_changeattr(dir, &data->res.dir_cinfo);
2745 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2746 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2747 }
2748 return status;
2749}
2750
2751static void nfs4_free_createdata(struct nfs4_createdata *data)
2752{
2753 kfree(data);
2754}
2755
4f390c15 2756static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2757 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2758{
57dc9a57
TM		 2759 struct nfs4_createdata *data;
2760 int status = -ENAMETOOLONG;
1da177e4 2761
94a6d753 2762 if (len > NFS4_MAXPATHLEN)
57dc9a57 2763 goto out;
4f390c15 2764
57dc9a57
TM		 2765 status = -ENOMEM;
2766 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2767 if (data == NULL)
2768 goto out;
2769
2770 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2771 data->arg.u.symlink.pages = &page;
2772 data->arg.u.symlink.len = len;
1da177e4 2773
57dc9a57
TM		 2774 status = nfs4_do_create(dir, dentry, data);
2775
2776 nfs4_free_createdata(data);
2777out:
1da177e4
LT		 2778 return status;
2779}
2780
4f390c15 2781static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2782 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2783{
2784 struct nfs4_exception exception = { };
2785 int err;
2786 do {
2787 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2788 _nfs4_proc_symlink(dir, dentry, page,
2789 len, sattr),
1da177e4
LT		 2790 &exception);
2791 } while (exception.retry);
2792 return err;
2793}
2794
2795static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2796 struct iattr *sattr)
2797{
57dc9a57
TM		 2798 struct nfs4_createdata *data;
2799 int status = -ENOMEM;
1da177e4 2800
57dc9a57
TM		 2801 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2802 if (data == NULL)
2803 goto out;
2804
2805 status = nfs4_do_create(dir, dentry, data);
2806
2807 nfs4_free_createdata(data);
2808out:
1da177e4
LT		 2809 return status;
2810}
2811
2812static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2813 struct iattr *sattr)
2814{
2815 struct nfs4_exception exception = { };
2816 int err;
2817 do {
2818 err = nfs4_handle_exception(NFS_SERVER(dir),
2819 _nfs4_proc_mkdir(dir, dentry, sattr),
2820 &exception);
2821 } while (exception.retry);
2822 return err;
2823}
2824
2825static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2826 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2827{
2828 struct inode *dir = dentry->d_inode;
2829 struct nfs4_readdir_arg args = {
2830 .fh = NFS_FH(dir),
56e4ebf8 2831 .pages = pages,
1da177e4
LT		 2832 .pgbase = 0,
2833 .count = count,
96d25e53 2834 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2835 };
2836 struct nfs4_readdir_res res;
2837 struct rpc_message msg = {
2838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2839 .rpc_argp = &args,
2840 .rpc_resp = &res,
2841 .rpc_cred = cred,
2842 };
2843 int status;
2844
3110ff80 2845 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2846 dentry->d_parent->d_name.name,
2847 dentry->d_name.name,
2848 (unsigned long long)cookie);
1da177e4
LT		 2849 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2850 res.pgbase = args.pgbase;
cccef3b9 2851 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2852 if (status == 0)
2853 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2854
2855 nfs_invalidate_atime(dir);
2856
3110ff80 2857 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2858 return status;
2859}
2860
2861static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2862 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2863{
2864 struct nfs4_exception exception = { };
2865 int err;
2866 do {
2867 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2868 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 2869 pages, count, plus),
1da177e4
LT		 2870 &exception);
2871 } while (exception.retry);
2872 return err;
2873}
2874
2875static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2876 struct iattr *sattr, dev_t rdev)
2877{
57dc9a57
TM		 2878 struct nfs4_createdata *data;
2879 int mode = sattr->ia_mode;
2880 int status = -ENOMEM;
1da177e4
LT		 2881
2882 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2883 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2884
2885 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2886 if (data == NULL)
2887 goto out;
2888
1da177e4 2889 if (S_ISFIFO(mode))
57dc9a57 2890 data->arg.ftype = NF4FIFO;
1da177e4 2891 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2892 data->arg.ftype = NF4BLK;
2893 data->arg.u.device.specdata1 = MAJOR(rdev);
2894 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2895 }
2896 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2897 data->arg.ftype = NF4CHR;
2898 data->arg.u.device.specdata1 = MAJOR(rdev);
2899 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2900 }
1da177e4 2901
57dc9a57
TM		 2902 status = nfs4_do_create(dir, dentry, data);
2903
2904 nfs4_free_createdata(data);
2905out:
1da177e4
LT		 2906 return status;
2907}
2908
2909static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2910 struct iattr *sattr, dev_t rdev)
2911{
2912 struct nfs4_exception exception = { };
2913 int err;
2914 do {
2915 err = nfs4_handle_exception(NFS_SERVER(dir),
2916 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2917 &exception);
2918 } while (exception.retry);
2919 return err;
2920}
2921
2922static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2923 struct nfs_fsstat *fsstat)
2924{
2925 struct nfs4_statfs_arg args = {
2926 .fh = fhandle,
2927 .bitmask = server->attr_bitmask,
2928 };
24ad148a
BH		 2929 struct nfs4_statfs_res res = {
2930 .fsstat = fsstat,
2931 };
1da177e4
LT		 2932 struct rpc_message msg = {
2933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2934 .rpc_argp = &args,
24ad148a 2935 .rpc_resp = &res,
1da177e4
LT		 2936 };
2937
0e574af1 2938 nfs_fattr_init(fsstat->fattr);
cccef3b9 2939 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2940}
2941
2942static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2943{
2944 struct nfs4_exception exception = { };
2945 int err;
2946 do {
2947 err = nfs4_handle_exception(server,
2948 _nfs4_proc_statfs(server, fhandle, fsstat),
2949 &exception);
2950 } while (exception.retry);
2951 return err;
2952}
2953
2954static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2955 struct nfs_fsinfo *fsinfo)
2956{
2957 struct nfs4_fsinfo_arg args = {
2958 .fh = fhandle,
2959 .bitmask = server->attr_bitmask,
2960 };
3dda5e43
BH		 2961 struct nfs4_fsinfo_res res = {
2962 .fsinfo = fsinfo,
2963 };
1da177e4
LT		 2964 struct rpc_message msg = {
2965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2966 .rpc_argp = &args,
3dda5e43 2967 .rpc_resp = &res,
1da177e4
LT		 2968 };
2969
cccef3b9 2970 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2971}
2972
2973static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2974{
2975 struct nfs4_exception exception = { };
2976 int err;
2977
2978 do {
2979 err = nfs4_handle_exception(server,
2980 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2981 &exception);
2982 } while (exception.retry);
2983 return err;
2984}
2985
2986static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2987{
0e574af1 2988 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2989 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2990}
2991
2992static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2993 struct nfs_pathconf *pathconf)
2994{
2995 struct nfs4_pathconf_arg args = {
2996 .fh = fhandle,
2997 .bitmask = server->attr_bitmask,
2998 };
d45b2989
BH		 2999 struct nfs4_pathconf_res res = {
3000 .pathconf = pathconf,
3001 };
1da177e4
LT		 3002 struct rpc_message msg = {
3003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3004 .rpc_argp = &args,
d45b2989 3005 .rpc_resp = &res,
1da177e4
LT		 3006 };
3007
3008 /* None of the pathconf attributes are mandatory to implement */
3009 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3010 memset(pathconf, 0, sizeof(*pathconf));
3011 return 0;
3012 }
3013
0e574af1 3014 nfs_fattr_init(pathconf->fattr);
cccef3b9 3015 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3016}
3017
3018static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3019 struct nfs_pathconf *pathconf)
3020{
3021 struct nfs4_exception exception = { };
3022 int err;
3023
3024 do {
3025 err = nfs4_handle_exception(server,
3026 _nfs4_proc_pathconf(server, fhandle, pathconf),
3027 &exception);
3028 } while (exception.retry);
3029 return err;
3030}
3031
ec06c096 3032static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3033{
ec06c096 3034 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3035
f11c88af
AA		 3036 dprintk("--> %s\n", __func__);
3037
14516c3a
TM		 3038 if (!nfs4_sequence_done(task, &data->res.seq_res))
3039 return -EAGAIN;
f11c88af 3040
9e33bed5 3041 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3042 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3043 return -EAGAIN;
1da177e4 3044 }
8850df99
TM		 3045
3046 nfs_invalidate_atime(data->inode);
1da177e4 3047 if (task->tk_status > 0)
ec06c096
TM		 3048 renew_lease(server, data->timestamp);
3049 return 0;
1da177e4
LT		 3050}
3051
bdc7f021 3052static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3053{
1da177e4 3054 data->timestamp = jiffies;
bdc7f021 3055 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3056}
3057
788e7a89 3058static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3059{
1da177e4
LT		 3060 struct inode *inode = data->inode;
3061
14516c3a
TM		 3062 if (!nfs4_sequence_done(task, &data->res.seq_res))
3063 return -EAGAIN;
def6ed7e 3064
9e33bed5 3065 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3066 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3067 return -EAGAIN;
1da177e4 3068 }
4f9838c7 3069 if (task->tk_status >= 0) {
1da177e4 3070 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3071 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3072 }
788e7a89 3073 return 0;
1da177e4
LT		 3074}
3075
bdc7f021 3076static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3077{
bdc7f021
TM		 3078 struct nfs_server *server = NFS_SERVER(data->inode);
3079
a65318bf 3080 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3081 data->res.server = server;
1da177e4
LT		 3082 data->timestamp = jiffies;
3083
bdc7f021 3084 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3085}
3086
788e7a89 3087static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3088{
1da177e4
LT		 3089 struct inode *inode = data->inode;
3090
14516c3a
TM		 3091 if (!nfs4_sequence_done(task, &data->res.seq_res))
3092 return -EAGAIN;
3093
9e33bed5 3094 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3095 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3096 return -EAGAIN;
1da177e4 3097 }
9e08a3c5 3098 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3099 return 0;
1da177e4
LT		 3100}
3101
bdc7f021 3102static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3103{
788e7a89 3104 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3105
a65318bf 3106 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3107 data->res.server = server;
bdc7f021 3108 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3109}
3110
9bc4e3ca
CL		 3111struct nfs4_renewdata {
3112 struct nfs_client *client;
3113 unsigned long timestamp;
3114};
3115
1da177e4
LT		 3116/*
3117 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3118 * standalone procedure for queueing an asynchronous RENEW.
3119 */
9bc4e3ca 3120static void nfs4_renew_release(void *calldata)
dc96aef9 3121{
9bc4e3ca
CL		 3122 struct nfs4_renewdata *data = calldata;
3123 struct nfs_client *clp = data->client;
dc96aef9 3124
0851de06
AB		 3125 if (atomic_read(&clp->cl_count) > 1)
3126 nfs4_schedule_state_renewal(clp);
3127 nfs_put_client(clp);
9bc4e3ca 3128 kfree(data);
dc96aef9
AB		 3129}
3130
9bc4e3ca 3131static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3132{
9bc4e3ca
CL		 3133 struct nfs4_renewdata *data = calldata;
3134 struct nfs_client *clp = data->client;
3135 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3136
3137 if (task->tk_status < 0) {
95baa25c
TM		 3138 /* Unless we're shutting down, schedule state recovery! */
3139 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3140 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3141 return;
3142 }
452e9352 3143 do_renew_lease(clp, timestamp);
1da177e4
LT		 3144}
3145
963d8fe5
TM		 3146static const struct rpc_call_ops nfs4_renew_ops = {
3147 .rpc_call_done = nfs4_renew_done,
dc96aef9 3148 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3149};
3150
adfa6f98 3151int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3152{
3153 struct rpc_message msg = {
3154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3155 .rpc_argp = clp,
b4454fe1 3156 .rpc_cred = cred,
1da177e4 3157 };
9bc4e3ca 3158 struct nfs4_renewdata *data;
1da177e4 3159
0851de06
AB		 3160 if (!atomic_inc_not_zero(&clp->cl_count))
3161 return -EIO;
9bc4e3ca
CL		 3162 data = kmalloc(sizeof(*data), GFP_KERNEL);
3163 if (data == NULL)
3164 return -ENOMEM;
3165 data->client = clp;
3166 data->timestamp = jiffies;
1da177e4 3167 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3168 &nfs4_renew_ops, data);
1da177e4
LT		 3169}
3170
adfa6f98 3171int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3172{
3173 struct rpc_message msg = {
3174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3175 .rpc_argp = clp,
b4454fe1 3176 .rpc_cred = cred,
1da177e4
LT		 3177 };
3178 unsigned long now = jiffies;
3179 int status;
3180
3181 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3182 if (status < 0)
3183 return status;
452e9352 3184 do_renew_lease(clp, now);
1da177e4
LT		 3185 return 0;
3186}
3187
aa1870af
BF		 3188static inline int nfs4_server_supports_acls(struct nfs_server *server)
3189{
3190 return (server->caps & NFS_CAP_ACLS)
3191 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3192 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3193}
3194
3195/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3196 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3197 * the stack.
3198 */
3199#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3200
3201static void buf_to_pages(const void *buf, size_t buflen,
3202 struct page **pages, unsigned int *pgbase)
3203{
3204 const void *p = buf;
3205
3206 *pgbase = offset_in_page(buf);
3207 p -= *pgbase;
3208 while (p < buf + buflen) {
3209 *(pages++) = virt_to_page(p);
3210 p += PAGE_CACHE_SIZE;
3211 }
3212}
3213
e50a1c2e
BF		 3214struct nfs4_cached_acl {
3215 int cached;
3216 size_t len;
3e9d4154 3217 char data[0];
e50a1c2e
BF		 3218};
3219
3220static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3221{
3222 struct nfs_inode *nfsi = NFS_I(inode);
3223
3224 spin_lock(&inode->i_lock);
3225 kfree(nfsi->nfs4_acl);
3226 nfsi->nfs4_acl = acl;
3227 spin_unlock(&inode->i_lock);
3228}
3229
3230static void nfs4_zap_acl_attr(struct inode *inode)
3231{
3232 nfs4_set_cached_acl(inode, NULL);
3233}
3234
3235static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3236{
3237 struct nfs_inode *nfsi = NFS_I(inode);
3238 struct nfs4_cached_acl *acl;
3239 int ret = -ENOENT;
3240
3241 spin_lock(&inode->i_lock);
3242 acl = nfsi->nfs4_acl;
3243 if (acl == NULL)
3244 goto out;
3245 if (buf == NULL) /* user is just asking for length */
3246 goto out_len;
3247 if (acl->cached == 0)
3248 goto out;
3249 ret = -ERANGE; /* see getxattr(2) man page */
3250 if (acl->len > buflen)
3251 goto out;
3252 memcpy(buf, acl->data, acl->len);
3253out_len:
3254 ret = acl->len;
3255out:
3256 spin_unlock(&inode->i_lock);
3257 return ret;
3258}
3259
3260static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3261{
3262 struct nfs4_cached_acl *acl;
3263
3264 if (buf && acl_len <= PAGE_SIZE) {
3265 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3266 if (acl == NULL)
3267 goto out;
3268 acl->cached = 1;
3269 memcpy(acl->data, buf, acl_len);
3270 } else {
3271 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3272 if (acl == NULL)
3273 goto out;
3274 acl->cached = 0;
3275 }
3276 acl->len = acl_len;
3277out:
3278 nfs4_set_cached_acl(inode, acl);
3279}
3280
16b4289c 3281static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3282{
aa1870af
BF		 3283 struct page *pages[NFS4ACL_MAXPAGES];
3284 struct nfs_getaclargs args = {
3285 .fh = NFS_FH(inode),
3286 .acl_pages = pages,
3287 .acl_len = buflen,
3288 };
663c79b3
BH		 3289 struct nfs_getaclres res = {
3290 .acl_len = buflen,
3291 };
e50a1c2e 3292 void *resp_buf;
aa1870af
BF		 3293 struct rpc_message msg = {
3294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3295 .rpc_argp = &args,
663c79b3 3296 .rpc_resp = &res,
aa1870af 3297 };
e50a1c2e 3298 struct page *localpage = NULL;
aa1870af
BF		 3299 int ret;
3300
e50a1c2e
BF		 3301 if (buflen < PAGE_SIZE) {
3302 /* As long as we're doing a round trip to the server anyway,
3303 * let's be prepared for a page of acl data. */
3304 localpage = alloc_page(GFP_KERNEL);
3305 resp_buf = page_address(localpage);
3306 if (localpage == NULL)
3307 return -ENOMEM;
3308 args.acl_pages[0] = localpage;
3309 args.acl_pgbase = 0;
663c79b3 3310 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3311 } else {
3312 resp_buf = buf;
3313 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3314 }
cccef3b9 3315 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3316 if (ret)
3317 goto out_free;
663c79b3
BH		 3318 if (res.acl_len > args.acl_len)
3319 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3320 else
663c79b3 3321 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3322 if (buf) {
3323 ret = -ERANGE;
663c79b3 3324 if (res.acl_len > buflen)
e50a1c2e
BF		 3325 goto out_free;
3326 if (localpage)
663c79b3 3327 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3328 }
663c79b3 3329 ret = res.acl_len;
e50a1c2e
BF		 3330out_free:
3331 if (localpage)
3332 __free_page(localpage);
aa1870af
BF		 3333 return ret;
3334}
3335
16b4289c
TM		 3336static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3337{
3338 struct nfs4_exception exception = { };
3339 ssize_t ret;
3340 do {
3341 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3342 if (ret >= 0)
3343 break;
3344 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3345 } while (exception.retry);
3346 return ret;
3347}
3348
e50a1c2e
BF		 3349static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3350{
3351 struct nfs_server *server = NFS_SERVER(inode);
3352 int ret;
3353
3354 if (!nfs4_server_supports_acls(server))
3355 return -EOPNOTSUPP;
3356 ret = nfs_revalidate_inode(server, inode);
3357 if (ret < 0)
3358 return ret;
3359 ret = nfs4_read_cached_acl(inode, buf, buflen);
3360 if (ret != -ENOENT)
3361 return ret;
3362 return nfs4_get_acl_uncached(inode, buf, buflen);
3363}
3364
16b4289c 3365static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3366{
3367 struct nfs_server *server = NFS_SERVER(inode);
3368 struct page *pages[NFS4ACL_MAXPAGES];
3369 struct nfs_setaclargs arg = {
3370 .fh = NFS_FH(inode),
3371 .acl_pages = pages,
3372 .acl_len = buflen,
3373 };
73c403a9 3374 struct nfs_setaclres res;
4b580ee3
BF		 3375 struct rpc_message msg = {
3376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3377 .rpc_argp = &arg,
73c403a9 3378 .rpc_resp = &res,
4b580ee3
BF		 3379 };
3380 int ret;
3381
3382 if (!nfs4_server_supports_acls(server))
3383 return -EOPNOTSUPP;
642ac549 3384 nfs_inode_return_delegation(inode);
4b580ee3 3385 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3386 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3387 nfs_access_zap_cache(inode);
3388 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3389 return ret;
3390}
3391
16b4289c
TM		 3392static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3393{
3394 struct nfs4_exception exception = { };
3395 int err;
3396 do {
3397 err = nfs4_handle_exception(NFS_SERVER(inode),
3398 __nfs4_proc_set_acl(inode, buf, buflen),
3399 &exception);
3400 } while (exception.retry);
3401 return err;
3402}
3403
1da177e4 3404static int
aa5190d0 3405nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3406{
aa5190d0
TM		 3407 struct nfs_client *clp = server->nfs_client;
3408
3409 if (task->tk_status >= 0)
1da177e4
LT		 3410 return 0;
3411 switch(task->tk_status) {
9e33bed5
TM		 3412 case -NFS4ERR_ADMIN_REVOKED:
3413 case -NFS4ERR_BAD_STATEID:
3414 case -NFS4ERR_OPENMODE:
3415 if (state == NULL)
3416 break;
3417 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3418 goto do_state_recovery;
1da177e4 3419 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3420 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3421 case -NFS4ERR_EXPIRED:
a2c0b9e2 3422 goto do_state_recovery;
4745e315
AA		 3423#if defined(CONFIG_NFS_V4_1)
3424 case -NFS4ERR_BADSESSION:
3425 case -NFS4ERR_BADSLOT:
3426 case -NFS4ERR_BAD_HIGH_SLOT:
3427 case -NFS4ERR_DEADSESSION:
3428 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3429 case -NFS4ERR_SEQ_FALSE_RETRY:
3430 case -NFS4ERR_SEQ_MISORDERED:
3431 dprintk("%s ERROR %d, Reset session\n", __func__,
3432 task->tk_status);
0b9e2d41 3433 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3434 task->tk_status = 0;
3435 return -EAGAIN;
3436#endif /* CONFIG_NFS_V4_1 */
1da177e4 3437 case -NFS4ERR_DELAY:
aa5190d0 3438 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3439 case -NFS4ERR_GRACE:
2c643488 3440 case -EKEYEXPIRED:
1da177e4
LT		 3441 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3442 task->tk_status = 0;
3443 return -EAGAIN;
3444 case -NFS4ERR_OLD_STATEID:
3445 task->tk_status = 0;
3446 return -EAGAIN;
3447 }
3448 task->tk_status = nfs4_map_errors(task->tk_status);
3449 return 0;
a2c0b9e2
TM		 3450do_state_recovery:
3451 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3452 nfs4_schedule_state_recovery(clp);
3453 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3454 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3455 task->tk_status = 0;
3456 return -EAGAIN;
1da177e4
LT		 3457}
3458
bb8b27e5
TM		 3459int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3460 unsigned short port, struct rpc_cred *cred,
3461 struct nfs4_setclientid_res *res)
1da177e4
LT		 3462{
3463 nfs4_verifier sc_verifier;
3464 struct nfs4_setclientid setclientid = {
3465 .sc_verifier = &sc_verifier,
3466 .sc_prog = program,
3467 };
3468 struct rpc_message msg = {
3469 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3470 .rpc_argp = &setclientid,
bb8b27e5 3471 .rpc_resp = res,
286d7d6a 3472 .rpc_cred = cred,
1da177e4 3473 };
bc4785cd 3474 __be32 *p;
1da177e4
LT		 3475 int loop = 0;
3476 int status;
3477
bc4785cd 3478 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3479 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3480 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3481
3482 for(;;) {
3483 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3484 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3485 clp->cl_ipaddr,
3486 rpc_peeraddr2str(clp->cl_rpcclient,
3487 RPC_DISPLAY_ADDR),
69dd716c
TM		 3488 rpc_peeraddr2str(clp->cl_rpcclient,
3489 RPC_DISPLAY_PROTO),
78ea323b 3490 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3491 clp->cl_id_uniquifier);
3492 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3493 sizeof(setclientid.sc_netid),
3494 rpc_peeraddr2str(clp->cl_rpcclient,
3495 RPC_DISPLAY_NETID));
1da177e4 3496 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3497 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3498 clp->cl_ipaddr, port >> 8, port & 255);
3499
3500 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3501 if (status != -NFS4ERR_CLID_INUSE)
3502 break;
3503 if (signalled())
3504 break;
3505 if (loop++ & 1)
3506 ssleep(clp->cl_lease_time + 1);
3507 else
3508 if (++clp->cl_id_uniquifier == 0)
3509 break;
3510 }
3511 return status;
3512}
3513
bb8b27e5
TM		 3514static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3515 struct nfs4_setclientid_res *arg,
3516 struct rpc_cred *cred)
1da177e4
LT		 3517{
3518 struct nfs_fsinfo fsinfo;
3519 struct rpc_message msg = {
3520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3521 .rpc_argp = arg,
1da177e4 3522 .rpc_resp = &fsinfo,
286d7d6a 3523 .rpc_cred = cred,
1da177e4
LT		 3524 };
3525 unsigned long now;
3526 int status;
3527
3528 now = jiffies;
3529 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3530 if (status == 0) {
3531 spin_lock(&clp->cl_lock);
3532 clp->cl_lease_time = fsinfo.lease_time * HZ;
3533 clp->cl_last_renewal = now;
3534 spin_unlock(&clp->cl_lock);
3535 }
3536 return status;
3537}
3538
bb8b27e5
TM		 3539int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3540 struct nfs4_setclientid_res *arg,
3541 struct rpc_cred *cred)
51581f3b 3542{
77e03677 3543 long timeout = 0;
51581f3b
TM		 3544 int err;
3545 do {
bb8b27e5 3546 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3547 switch (err) {
3548 case 0:
3549 return err;
3550 case -NFS4ERR_RESOURCE:
3551 /* The IBM lawyers misread another document! */
3552 case -NFS4ERR_DELAY:
3553 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3554 }
3555 } while (err == 0);
3556 return err;
3557}
3558
fe650407
TM		 3559struct nfs4_delegreturndata {
3560 struct nfs4_delegreturnargs args;
fa178f29 3561 struct nfs4_delegreturnres res;
fe650407
TM		 3562 struct nfs_fh fh;
3563 nfs4_stateid stateid;
26e976a8 3564 unsigned long timestamp;
fa178f29 3565 struct nfs_fattr fattr;
fe650407
TM		 3566 int rpc_status;
3567};
3568
fe650407
TM		 3569static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3570{
3571 struct nfs4_delegreturndata *data = calldata;
938e1010 3572
14516c3a
TM		 3573 if (!nfs4_sequence_done(task, &data->res.seq_res))
3574 return;
938e1010 3575
79708861
RL		 3576 switch (task->tk_status) {
3577 case -NFS4ERR_STALE_STATEID:
3578 case -NFS4ERR_EXPIRED:
3579 case 0:
fa178f29 3580 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3581 break;
3582 default:
3583 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3584 -EAGAIN) {
3585 nfs_restart_rpc(task, data->res.server->nfs_client);
3586 return;
3587 }
3588 }
3589 data->rpc_status = task->tk_status;
fe650407
TM		 3590}
3591
3592static void nfs4_delegreturn_release(void *calldata)
3593{
fe650407
TM		 3594 kfree(calldata);
3595}
3596
938e1010
AA		 3597#if defined(CONFIG_NFS_V4_1)
3598static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3599{
3600 struct nfs4_delegreturndata *d_data;
3601
3602 d_data = (struct nfs4_delegreturndata *)data;
3603
035168ab 3604 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3605 &d_data->args.seq_args,
3606 &d_data->res.seq_res, 1, task))
3607 return;
3608 rpc_call_start(task);
3609}
3610#endif /* CONFIG_NFS_V4_1 */
3611
c8d149f3 3612static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3613#if defined(CONFIG_NFS_V4_1)
3614 .rpc_call_prepare = nfs4_delegreturn_prepare,
3615#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3616 .rpc_call_done = nfs4_delegreturn_done,
3617 .rpc_release = nfs4_delegreturn_release,
3618};
3619
e6f81075 3620static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3621{
3622 struct nfs4_delegreturndata *data;
fa178f29 3623 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3624 struct rpc_task *task;
5138fde0
TM		 3625 struct rpc_message msg = {
3626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3627 .rpc_cred = cred,
3628 };
c970aa85
TM		 3629 struct rpc_task_setup task_setup_data = {
3630 .rpc_client = server->client,
5138fde0 3631 .rpc_message = &msg,
c970aa85
TM		 3632 .callback_ops = &nfs4_delegreturn_ops,
3633 .flags = RPC_TASK_ASYNC,
3634 };
e6f81075 3635 int status = 0;
fe650407 3636
8535b2be 3637 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3638 if (data == NULL)
3639 return -ENOMEM;
3640 data->args.fhandle = &data->fh;
3641 data->args.stateid = &data->stateid;
fa178f29 3642 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3643 nfs_copy_fh(&data->fh, NFS_FH(inode));
3644 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3645 data->res.fattr = &data->fattr;
3646 data->res.server = server;
5138fde0 3647 nfs_fattr_init(data->res.fattr);
26e976a8 3648 data->timestamp = jiffies;
fe650407
TM		 3649 data->rpc_status = 0;
3650
c970aa85 3651 task_setup_data.callback_data = data;
5138fde0
TM		 3652 msg.rpc_argp = &data->args,
3653 msg.rpc_resp = &data->res,
c970aa85 3654 task = rpc_run_task(&task_setup_data);
7a1218a2 3655 if (IS_ERR(task))
fe650407 3656 return PTR_ERR(task);
e6f81075
TM		 3657 if (!issync)
3658 goto out;
fe650407 3659 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3660 if (status != 0)
3661 goto out;
3662 status = data->rpc_status;
3663 if (status != 0)
3664 goto out;
3665 nfs_refresh_inode(inode, &data->fattr);
3666out:
e6b3c4db 3667 rpc_put_task(task);
fe650407 3668 return status;
1da177e4
LT		 3669}
3670
e6f81075 3671int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3672{
3673 struct nfs_server *server = NFS_SERVER(inode);
3674 struct nfs4_exception exception = { };
3675 int err;
3676 do {
e6f81075 3677 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3678 switch (err) {
3679 case -NFS4ERR_STALE_STATEID:
3680 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3681 case 0:
3682 return 0;
3683 }
3684 err = nfs4_handle_exception(server, err, &exception);
3685 } while (exception.retry);
3686 return err;
3687}
3688
3689#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3690#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3691
3692/*
3693 * sleep, with exponential backoff, and retry the LOCK operation.
3694 */
3695static unsigned long
3696nfs4_set_lock_task_retry(unsigned long timeout)
3697{
150030b7 3698 schedule_timeout_killable(timeout);
1da177e4
LT		 3699 timeout <<= 1;
3700 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3701 return NFS4_LOCK_MAXTIMEOUT;
3702 return timeout;
3703}
3704
1da177e4
LT		 3705static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3706{
3707 struct inode *inode = state->inode;
3708 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3709 struct nfs_client *clp = server->nfs_client;
911d1aaf 3710 struct nfs_lockt_args arg = {
1da177e4 3711 .fh = NFS_FH(inode),
911d1aaf 3712 .fl = request,
1da177e4 3713 };
911d1aaf
TM		 3714 struct nfs_lockt_res res = {
3715 .denied = request,
1da177e4
LT		 3716 };
3717 struct rpc_message msg = {
3718 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3719 .rpc_argp = &arg,
3720 .rpc_resp = &res,
3721 .rpc_cred = state->owner->so_cred,
3722 };
1da177e4
LT		 3723 struct nfs4_lock_state *lsp;
3724 int status;
3725
911d1aaf 3726 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3727 status = nfs4_set_lock_state(state, request);
3728 if (status != 0)
3729 goto out;
3730 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3731 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3732 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3733 switch (status) {
3734 case 0:
3735 request->fl_type = F_UNLCK;
3736 break;
3737 case -NFS4ERR_DENIED:
3738 status = 0;
1da177e4 3739 }
70cc6487 3740 request->fl_ops->fl_release_private(request);
8d0a8a9d 3741out:
1da177e4
LT		 3742 return status;
3743}
3744
3745static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3746{
3747 struct nfs4_exception exception = { };
3748 int err;
3749
3750 do {
3751 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3752 _nfs4_proc_getlk(state, cmd, request),
3753 &exception);
3754 } while (exception.retry);
3755 return err;
3756}
3757
3758static int do_vfs_lock(struct file *file, struct file_lock *fl)
3759{
3760 int res = 0;
3761 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3762 case FL_POSIX:
3763 res = posix_lock_file_wait(file, fl);
3764 break;
3765 case FL_FLOCK:
3766 res = flock_lock_file_wait(file, fl);
3767 break;
3768 default:
3769 BUG();
3770 }
1da177e4
LT		 3771 return res;
3772}
3773
faf5f49c 3774struct nfs4_unlockdata {
911d1aaf
TM		 3775 struct nfs_locku_args arg;
3776 struct nfs_locku_res res;
faf5f49c
TM		 3777 struct nfs4_lock_state *lsp;
3778 struct nfs_open_context *ctx;
911d1aaf
TM		 3779 struct file_lock fl;
3780 const struct nfs_server *server;
26e976a8 3781 unsigned long timestamp;
faf5f49c
TM		 3782};
3783
911d1aaf
TM		 3784static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3785 struct nfs_open_context *ctx,
3786 struct nfs4_lock_state *lsp,
3787 struct nfs_seqid *seqid)
3788{
3789 struct nfs4_unlockdata *p;
3790 struct inode *inode = lsp->ls_state->inode;
3791
8535b2be 3792 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3793 if (p == NULL)
3794 return NULL;
3795 p->arg.fh = NFS_FH(inode);
3796 p->arg.fl = &p->fl;
3797 p->arg.seqid = seqid;
c1d51931 3798 p->res.seqid = seqid;
911d1aaf
TM		 3799 p->arg.stateid = &lsp->ls_stateid;
3800 p->lsp = lsp;
3801 atomic_inc(&lsp->ls_count);
3802 /* Ensure we don't close file until we're done freeing locks! */
3803 p->ctx = get_nfs_open_context(ctx);
3804 memcpy(&p->fl, fl, sizeof(p->fl));
3805 p->server = NFS_SERVER(inode);
3806 return p;
3807}
3808
06f814a3 3809static void nfs4_locku_release_calldata(void *data)
faf5f49c 3810{
963d8fe5 3811 struct nfs4_unlockdata *calldata = data;
911d1aaf 3812 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3813 nfs4_put_lock_state(calldata->lsp);
3814 put_nfs_open_context(calldata->ctx);
3815 kfree(calldata);
faf5f49c
TM		 3816}
3817
963d8fe5 3818static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3819{
963d8fe5 3820 struct nfs4_unlockdata *calldata = data;
faf5f49c 3821
14516c3a
TM		 3822 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3823 return;
faf5f49c
TM		 3824 switch (task->tk_status) {
3825 case 0:
3826 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3827 calldata->res.stateid.data,
faf5f49c 3828 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3829 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3830 break;
9e33bed5
TM		 3831 case -NFS4ERR_BAD_STATEID:
3832 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3833 case -NFS4ERR_STALE_STATEID:
3834 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3835 break;
3836 default:
9e33bed5 3837 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3838 nfs_restart_rpc(task,
d61e612a 3839 calldata->server->nfs_client);
faf5f49c 3840 }
faf5f49c
TM		 3841}
3842
4ce70ada 3843static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3844{
4ce70ada 3845 struct nfs4_unlockdata *calldata = data;
faf5f49c 3846
911d1aaf 3847 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3848 return;
3849 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3850 /* Note: exit _without_ running nfs4_locku_done */
3851 task->tk_action = NULL;
faf5f49c
TM		 3852 return;
3853 }
26e976a8 3854 calldata->timestamp = jiffies;
035168ab 3855 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3856 &calldata->arg.seq_args,
3857 &calldata->res.seq_res, 1, task))
3858 return;
5138fde0 3859 rpc_call_start(task);
faf5f49c
TM		 3860}
3861
963d8fe5 3862static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3863 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3864 .rpc_call_done = nfs4_locku_done,
06f814a3 3865 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3866};
3867
a5d16a4d
TM		 3868static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3869 struct nfs_open_context *ctx,
3870 struct nfs4_lock_state *lsp,
3871 struct nfs_seqid *seqid)
3872{
3873 struct nfs4_unlockdata *data;
5138fde0
TM		 3874 struct rpc_message msg = {
3875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3876 .rpc_cred = ctx->cred,
3877 };
c970aa85
TM		 3878 struct rpc_task_setup task_setup_data = {
3879 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3880 .rpc_message = &msg,
c970aa85 3881 .callback_ops = &nfs4_locku_ops,
101070ca 3882 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3883 .flags = RPC_TASK_ASYNC,
3884 };
a5d16a4d 3885
137d6aca
FF		 3886 /* Ensure this is an unlock - when canceling a lock, the
3887 * canceled lock is passed in, and it won't be an unlock.
3888 */
3889 fl->fl_type = F_UNLCK;
3890
a5d16a4d
TM		 3891 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3892 if (data == NULL) {
3893 nfs_free_seqid(seqid);
3894 return ERR_PTR(-ENOMEM);
3895 }
3896
5138fde0
TM		 3897 msg.rpc_argp = &data->arg,
3898 msg.rpc_resp = &data->res,
c970aa85
TM		 3899 task_setup_data.callback_data = data;
3900 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3901}
3902
faf5f49c
TM		 3903static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3904{
19e03c57 3905 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3906 struct nfs_seqid *seqid;
1da177e4 3907 struct nfs4_lock_state *lsp;
06f814a3
TM		 3908 struct rpc_task *task;
3909 int status = 0;
536ff0f8 3910 unsigned char fl_flags = request->fl_flags;
faf5f49c 3911
8d0a8a9d 3912 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3913 /* Unlock _before_ we do the RPC call */
3914 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3915 down_read(&nfsi->rwsem);
3916 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3917 up_read(&nfsi->rwsem);
9b073574 3918 goto out;
19e03c57
TM		 3919 }
3920 up_read(&nfsi->rwsem);
8d0a8a9d 3921 if (status != 0)
9b073574
TM		 3922 goto out;
3923 /* Is this a delegated lock? */
3924 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3925 goto out;
8d0a8a9d 3926 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 3927 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 3928 status = -ENOMEM;
911d1aaf 3929 if (seqid == NULL)
9b073574 3930 goto out;
cd3758e3 3931 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3932 status = PTR_ERR(task);
3933 if (IS_ERR(task))
9b073574 3934 goto out;
a5d16a4d 3935 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3936 rpc_put_task(task);
9b073574 3937out:
536ff0f8 3938 request->fl_flags = fl_flags;
1da177e4
LT		 3939 return status;
3940}
3941
a5d16a4d
TM		 3942struct nfs4_lockdata {
3943 struct nfs_lock_args arg;
3944 struct nfs_lock_res res;
3945 struct nfs4_lock_state *lsp;
3946 struct nfs_open_context *ctx;
3947 struct file_lock fl;
26e976a8 3948 unsigned long timestamp;
a5d16a4d
TM		 3949 int rpc_status;
3950 int cancelled;
66179efe 3951 struct nfs_server *server;
a5d16a4d
TM		 3952};
3953
3954static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 3955 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
3956 gfp_t gfp_mask)
1da177e4 3957{
a5d16a4d
TM		 3958 struct nfs4_lockdata *p;
3959 struct inode *inode = lsp->ls_state->inode;
1da177e4 3960 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 3961
8535b2be 3962 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 3963 if (p == NULL)
3964 return NULL;
3965
3966 p->arg.fh = NFS_FH(inode);
3967 p->arg.fl = &p->fl;
8535b2be 3968 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 3969 if (p->arg.open_seqid == NULL)
3970 goto out_free;
8535b2be 3971 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 3972 if (p->arg.lock_seqid == NULL)
2f74c0a0 3973 goto out_free_seqid;
a5d16a4d 3974 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3975 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3976 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3977 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 3978 p->lsp = lsp;
66179efe 3979 p->server = server;
a5d16a4d
TM		 3980 atomic_inc(&lsp->ls_count);
3981 p->ctx = get_nfs_open_context(ctx);
3982 memcpy(&p->fl, fl, sizeof(p->fl));
3983 return p;
2f74c0a0
TM		 3984out_free_seqid:
3985 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3986out_free:
3987 kfree(p);
3988 return NULL;
3989}
3990
3991static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3992{
3993 struct nfs4_lockdata *data = calldata;
3994 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3995
3110ff80 3996 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3997 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3998 return;
a5d16a4d
TM		 3999 /* Do we need to do an open_to_lock_owner? */
4000 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4001 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4002 return;
a5d16a4d
TM		 4003 data->arg.open_stateid = &state->stateid;
4004 data->arg.new_lock_owner = 1;
c1d51931 4005 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4006 } else
4007 data->arg.new_lock_owner = 0;
26e976a8 4008 data->timestamp = jiffies;
035168ab
TM		 4009 if (nfs4_setup_sequence(data->server,
4010 &data->arg.seq_args,
66179efe
AA		 4011 &data->res.seq_res, 1, task))
4012 return;
5138fde0 4013 rpc_call_start(task);
3110ff80 4014 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4015}
4016
b257957e
AB		 4017static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4018{
4019 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4020 nfs4_lock_prepare(task, calldata);
4021}
4022
a5d16a4d
TM		 4023static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4024{
4025 struct nfs4_lockdata *data = calldata;
4026
3110ff80 4027 dprintk("%s: begin!\n", __func__);
a5d16a4d 4028
14516c3a
TM		 4029 if (!nfs4_sequence_done(task, &data->res.seq_res))
4030 return;
66179efe 4031
a5d16a4d 4032 data->rpc_status = task->tk_status;
a5d16a4d 4033 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4034 if (data->rpc_status == 0)
4035 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4036 else
4037 goto out;
4038 }
4039 if (data->rpc_status == 0) {
4040 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4041 sizeof(data->lsp->ls_stateid.data));
4042 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4043 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4044 }
a5d16a4d 4045out:
3110ff80 4046 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4047}
4048
4049static void nfs4_lock_release(void *calldata)
4050{
4051 struct nfs4_lockdata *data = calldata;
4052
3110ff80 4053 dprintk("%s: begin!\n", __func__);
2f74c0a0 4054 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4055 if (data->cancelled != 0) {
4056 struct rpc_task *task;
4057 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4058 data->arg.lock_seqid);
4059 if (!IS_ERR(task))
e6b3c4db 4060 rpc_put_task(task);
3110ff80 4061 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4062 } else
4063 nfs_free_seqid(data->arg.lock_seqid);
4064 nfs4_put_lock_state(data->lsp);
4065 put_nfs_open_context(data->ctx);
4066 kfree(data);
3110ff80 4067 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4068}
4069
4070static const struct rpc_call_ops nfs4_lock_ops = {
4071 .rpc_call_prepare = nfs4_lock_prepare,
4072 .rpc_call_done = nfs4_lock_done,
4073 .rpc_release = nfs4_lock_release,
4074};
4075
b257957e
AB		 4076static const struct rpc_call_ops nfs4_recover_lock_ops = {
4077 .rpc_call_prepare = nfs4_recover_lock_prepare,
4078 .rpc_call_done = nfs4_lock_done,
4079 .rpc_release = nfs4_lock_release,
4080};
4081
2bee72a6
TM		 4082static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4083{
4084 struct nfs_client *clp = server->nfs_client;
4085 struct nfs4_state *state = lsp->ls_state;
4086
4087 switch (error) {
4088 case -NFS4ERR_ADMIN_REVOKED:
4089 case -NFS4ERR_BAD_STATEID:
4090 case -NFS4ERR_EXPIRED:
4091 if (new_lock_owner != 0 ||
4092 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4093 nfs4_state_mark_reclaim_nograce(clp, state);
4094 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4095 break;
4096 case -NFS4ERR_STALE_STATEID:
4097 if (new_lock_owner != 0 ||
4098 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4099 nfs4_state_mark_reclaim_reboot(clp, state);
4100 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4101 };
4102}
4103
afe6c27c 4104static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4105{
4106 struct nfs4_lockdata *data;
4107 struct rpc_task *task;
5138fde0
TM		 4108 struct rpc_message msg = {
4109 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4110 .rpc_cred = state->owner->so_cred,
4111 };
c970aa85
TM		 4112 struct rpc_task_setup task_setup_data = {
4113 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4114 .rpc_message = &msg,
c970aa85 4115 .callback_ops = &nfs4_lock_ops,
101070ca 4116 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4117 .flags = RPC_TASK_ASYNC,
4118 };
a5d16a4d
TM		 4119 int ret;
4120
3110ff80 4121 dprintk("%s: begin!\n", __func__);
cd3758e3 4122 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4123 fl->fl_u.nfs4_fl.owner,
4124 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4125 if (data == NULL)
4126 return -ENOMEM;
4127 if (IS_SETLKW(cmd))
4128 data->arg.block = 1;
b257957e
AB		 4129 if (recovery_type > NFS_LOCK_NEW) {
4130 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4131 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4132 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4133 }
5138fde0
TM		 4134 msg.rpc_argp = &data->arg,
4135 msg.rpc_resp = &data->res,
c970aa85
TM		 4136 task_setup_data.callback_data = data;
4137 task = rpc_run_task(&task_setup_data);
7a1218a2 4138 if (IS_ERR(task))
a5d16a4d 4139 return PTR_ERR(task);
a5d16a4d
TM		 4140 ret = nfs4_wait_for_completion_rpc_task(task);
4141 if (ret == 0) {
4142 ret = data->rpc_status;
2bee72a6
TM		 4143 if (ret)
4144 nfs4_handle_setlk_error(data->server, data->lsp,
4145 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4146 } else
4147 data->cancelled = 1;
e6b3c4db 4148 rpc_put_task(task);
3110ff80 4149 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4150 return ret;
1da177e4
LT		 4151}
4152
4153static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4154{
202b50dc
TM		 4155 struct nfs_server *server = NFS_SERVER(state->inode);
4156 struct nfs4_exception exception = { };
4157 int err;
4158
4159 do {
42a2d13e
TM		 4160 /* Cache the lock if possible... */
4161 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4162 return 0;
afe6c27c 4163 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4164 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4165 break;
4166 nfs4_handle_exception(server, err, &exception);
4167 } while (exception.retry);
4168 return err;
1da177e4
LT		 4169}
4170
4171static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4172{
202b50dc
TM		 4173 struct nfs_server *server = NFS_SERVER(state->inode);
4174 struct nfs4_exception exception = { };
4175 int err;
4176
6bfc93ef
TM		 4177 err = nfs4_set_lock_state(state, request);
4178 if (err != 0)
4179 return err;
202b50dc 4180 do {
42a2d13e
TM		 4181 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4182 return 0;
afe6c27c 4183 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4184 switch (err) {
4185 default:
4186 goto out;
4187 case -NFS4ERR_GRACE:
4188 case -NFS4ERR_DELAY:
4189 nfs4_handle_exception(server, err, &exception);
4190 err = 0;
4191 }
202b50dc 4192 } while (exception.retry);
a9ed2e25 4193out:
202b50dc 4194 return err;
1da177e4
LT		 4195}
4196
4197static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4198{
19e03c57 4199 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4200 unsigned char fl_flags = request->fl_flags;
8e469ebd 4201 int status = -ENOLCK;
1da177e4 4202
8e469ebd
TM		 4203 if ((fl_flags & FL_POSIX) &&
4204 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4205 goto out;
6bfc93ef 4206 /* Is this a delegated open? */
6bfc93ef
TM		 4207 status = nfs4_set_lock_state(state, request);
4208 if (status != 0)
4209 goto out;
01c3b861
TM		 4210 request->fl_flags |= FL_ACCESS;
4211 status = do_vfs_lock(request->fl_file, request);
4212 if (status < 0)
4213 goto out;
19e03c57 4214 down_read(&nfsi->rwsem);
01c3b861 4215 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4216 /* Yes: cache locks! */
01c3b861 4217 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4218 request->fl_flags = fl_flags & ~FL_SLEEP;
4219 status = do_vfs_lock(request->fl_file, request);
4220 goto out_unlock;
01c3b861 4221 }
afe6c27c 4222 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4223 if (status != 0)
01c3b861 4224 goto out_unlock;
6bfc93ef 4225 /* Note: we always want to sleep here! */
01c3b861 4226 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4227 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4228 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4229out_unlock:
19e03c57 4230 up_read(&nfsi->rwsem);
01c3b861
TM		 4231out:
4232 request->fl_flags = fl_flags;
1da177e4
LT		 4233 return status;
4234}
4235
4236static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4237{
4238 struct nfs4_exception exception = { };
4239 int err;
4240
4241 do {
965b5d67
TM		 4242 err = _nfs4_proc_setlk(state, cmd, request);
4243 if (err == -NFS4ERR_DENIED)
4244 err = -EAGAIN;
1da177e4 4245 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4246 err, &exception);
1da177e4
LT		 4247 } while (exception.retry);
4248 return err;
4249}
4250
4251static int
4252nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4253{
4254 struct nfs_open_context *ctx;
4255 struct nfs4_state *state;
4256 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4257 int status;
4258
4259 /* verify open state */
cd3758e3 4260 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4261 state = ctx->state;
4262
4263 if (request->fl_start < 0 || request->fl_end < 0)
4264 return -EINVAL;
4265
d953126a
TM		 4266 if (IS_GETLK(cmd)) {
4267 if (state != NULL)
4268 return nfs4_proc_getlk(state, F_GETLK, request);
4269 return 0;
4270 }
1da177e4
LT		 4271
4272 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4273 return -EINVAL;
4274
d953126a
TM		 4275 if (request->fl_type == F_UNLCK) {
4276 if (state != NULL)
4277 return nfs4_proc_unlck(state, cmd, request);
4278 return 0;
4279 }
1da177e4 4280
d953126a
TM		 4281 if (state == NULL)
4282 return -ENOLCK;
1da177e4
LT		 4283 do {
4284 status = nfs4_proc_setlk(state, cmd, request);
4285 if ((status != -EAGAIN) || IS_SETLK(cmd))
4286 break;
4287 timeout = nfs4_set_lock_task_retry(timeout);
4288 status = -ERESTARTSYS;
4289 if (signalled())
4290 break;
4291 } while(status < 0);
1da177e4
LT		 4292 return status;
4293}
4294
888e694c
TM		 4295int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4296{
4297 struct nfs_server *server = NFS_SERVER(state->inode);
4298 struct nfs4_exception exception = { };
4299 int err;
4300
4301 err = nfs4_set_lock_state(state, fl);
4302 if (err != 0)
4303 goto out;
4304 do {
afe6c27c 4305 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4306 switch (err) {
4307 default:
4308 printk(KERN_ERR "%s: unhandled error %d.\n",
4309 __func__, err);
4310 case 0:
965b5d67 4311 case -ESTALE:
d5122201
TM		 4312 goto out;
4313 case -NFS4ERR_EXPIRED:
4314 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4315 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4316 case -NFS4ERR_BADSESSION:
4317 case -NFS4ERR_BADSLOT:
4318 case -NFS4ERR_BAD_HIGH_SLOT:
4319 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4320 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4321 nfs4_schedule_state_recovery(server->nfs_client);
4322 goto out;
965b5d67
TM		 4323 case -ERESTARTSYS:
4324 /*
4325 * The show must go on: exit, but mark the
4326 * stateid as needing recovery.
4327 */
4328 case -NFS4ERR_ADMIN_REVOKED:
4329 case -NFS4ERR_BAD_STATEID:
4330 case -NFS4ERR_OPENMODE:
4331 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4332 err = 0;
4333 goto out;
168667c4
TM		 4334 case -EKEYEXPIRED:
4335 /*
4336 * User RPCSEC_GSS context has expired.
4337 * We cannot recover this stateid now, so
4338 * skip it and allow recovery thread to
4339 * proceed.
4340 */
4341 err = 0;
4342 goto out;
965b5d67
TM		 4343 case -ENOMEM:
4344 case -NFS4ERR_DENIED:
4345 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4346 err = 0;
4347 goto out;
d5122201
TM		 4348 case -NFS4ERR_DELAY:
4349 break;
4350 }
888e694c
TM		 4351 err = nfs4_handle_exception(server, err, &exception);
4352 } while (exception.retry);
4353out:
4354 return err;
4355}
6b3b5496 4356
d3c7b7cc
TM		 4357static void nfs4_release_lockowner_release(void *calldata)
4358{
4359 kfree(calldata);
4360}
4361
4362const struct rpc_call_ops nfs4_release_lockowner_ops = {
4363 .rpc_release = nfs4_release_lockowner_release,
4364};
4365
4366void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4367{
4368 struct nfs_server *server = lsp->ls_state->owner->so_server;
4369 struct nfs_release_lockowner_args *args;
4370 struct rpc_message msg = {
4371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4372 };
4373
4374 if (server->nfs_client->cl_mvops->minor_version != 0)
4375 return;
4376 args = kmalloc(sizeof(*args), GFP_NOFS);
4377 if (!args)
4378 return;
4379 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4380 args->lock_owner.id = lsp->ls_id.id;
4381 msg.rpc_argp = args;
4382 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4383}
4384
aa1870af
BF		 4385#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4386
6b3b5496
BF		 4387int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4388 size_t buflen, int flags)
4389{
4b580ee3
BF		 4390 struct inode *inode = dentry->d_inode;
4391
4392 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4393 return -EOPNOTSUPP;
4394
4b580ee3 4395 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4396}
4397
4398/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4399 * and that's what we'll do for e.g. user attributes that haven't been set.
4400 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4401 * attributes in kernel-managed attribute namespaces. */
4402ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4403 size_t buflen)
4404{
aa1870af
BF		 4405 struct inode *inode = dentry->d_inode;
4406
4407 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4408 return -EOPNOTSUPP;
4409
4410 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4411}
4412
4413ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4414{
aa1870af 4415 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4416
096455a2
BF		 4417 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4418 return 0;
6b3b5496
BF		 4419 if (buf && buflen < len)
4420 return -ERANGE;
4421 if (buf)
aa1870af
BF		 4422 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4423 return len;
6b3b5496
BF		 4424}
4425
69aaaae1
TM		 4426static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4427{
4428 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4429 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4430 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4431 return;
4432
4433 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4434 NFS_ATTR_FATTR_NLINK;
4435 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4436 fattr->nlink = 2;
4437}
4438
56659e99 4439int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4440 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4441{
4442 struct nfs_server *server = NFS_SERVER(dir);
4443 u32 bitmask[2] = {
361e624f
MN		 4444 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4445 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4446 };
4447 struct nfs4_fs_locations_arg args = {
4448 .dir_fh = NFS_FH(dir),
c228fd3a 4449 .name = name,
683b57b4
TM		 4450 .page = page,
4451 .bitmask = bitmask,
4452 };
22958463
BH		 4453 struct nfs4_fs_locations_res res = {
4454 .fs_locations = fs_locations,
4455 };
683b57b4
TM		 4456 struct rpc_message msg = {
4457 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4458 .rpc_argp = &args,
22958463 4459 .rpc_resp = &res,
683b57b4
TM		 4460 };
4461 int status;
4462
3110ff80 4463 dprintk("%s: start\n", __func__);
c228fd3a 4464 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4465 fs_locations->server = server;
830b8e33 4466 fs_locations->nlocations = 0;
cccef3b9 4467 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4468 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4469 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4470 return status;
4471}
4472
557134a3 4473#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4474/*
4475 * nfs4_proc_exchange_id()
4476 *
4477 * Since the clientid has expired, all compounds using sessions
4478 * associated with the stale clientid will be returning
4479 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4480 * be in some phase of session reset.
4481 */
4d643d1d 4482int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4483{
4484 nfs4_verifier verifier;
4485 struct nfs41_exchange_id_args args = {
4486 .client = clp,
4487 .flags = clp->cl_exchange_flags,
4488 };
4489 struct nfs41_exchange_id_res res = {
4490 .client = clp,
4491 };
4492 int status;
4493 struct rpc_message msg = {
4494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4495 .rpc_argp = &args,
4496 .rpc_resp = &res,
4497 .rpc_cred = cred,
4498 };
4499 __be32 *p;
4500
4501 dprintk("--> %s\n", __func__);
4502 BUG_ON(clp == NULL);
a7b72103 4503
7b183d0d
AB		 4504 /* Remove server-only flags */
4505 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4506
99fe60d0
BH		 4507 p = (u32 *)verifier.data;
4508 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4509 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4510 args.verifier = &verifier;
4511
4512 while (1) {
4513 args.id_len = scnprintf(args.id, sizeof(args.id),
4514 "%s/%s %u",
4515 clp->cl_ipaddr,
4516 rpc_peeraddr2str(clp->cl_rpcclient,
4517 RPC_DISPLAY_ADDR),
4518 clp->cl_id_uniquifier);
4519
4520 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4521
180b62a3 4522 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4523 break;
4524
4525 if (signalled())
4526 break;
4527
4528 if (++clp->cl_id_uniquifier == 0)
4529 break;
4530 }
4531
4532 dprintk("<-- %s status= %d\n", __func__, status);
4533 return status;
4534}
4535
2050f0cc
AA		 4536struct nfs4_get_lease_time_data {
4537 struct nfs4_get_lease_time_args *args;
4538 struct nfs4_get_lease_time_res *res;
4539 struct nfs_client *clp;
4540};
4541
4542static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4543 void *calldata)
4544{
4545 int ret;
4546 struct nfs4_get_lease_time_data *data =
4547 (struct nfs4_get_lease_time_data *)calldata;
4548
4549 dprintk("--> %s\n", __func__);
689cf5c1 4550 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4551 /* just setup sequence, do not trigger session recovery
4552 since we're invoked within one */
4553 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4554 &data->args->la_seq_args,
4555 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4556
4557 BUG_ON(ret == -EAGAIN);
4558 rpc_call_start(task);
4559 dprintk("<-- %s\n", __func__);
4560}
4561
4562/*
4563 * Called from nfs4_state_manager thread for session setup, so don't recover
4564 * from sequence operation or clientid errors.
4565 */
4566static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4567{
4568 struct nfs4_get_lease_time_data *data =
4569 (struct nfs4_get_lease_time_data *)calldata;
4570
4571 dprintk("--> %s\n", __func__);
14516c3a
TM		 4572 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4573 return;
2050f0cc
AA		 4574 switch (task->tk_status) {
4575 case -NFS4ERR_DELAY:
4576 case -NFS4ERR_GRACE:
4577 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4578 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4579 task->tk_status = 0;
0110ee15 4580 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4581 return;
4582 }
2050f0cc
AA		 4583 dprintk("<-- %s\n", __func__);
4584}
4585
4586struct rpc_call_ops nfs4_get_lease_time_ops = {
4587 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4588 .rpc_call_done = nfs4_get_lease_time_done,
4589};
4590
4591int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4592{
4593 struct rpc_task *task;
4594 struct nfs4_get_lease_time_args args;
4595 struct nfs4_get_lease_time_res res = {
4596 .lr_fsinfo = fsinfo,
4597 };
4598 struct nfs4_get_lease_time_data data = {
4599 .args = &args,
4600 .res = &res,
4601 .clp = clp,
4602 };
4603 struct rpc_message msg = {
4604 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4605 .rpc_argp = &args,
4606 .rpc_resp = &res,
4607 };
4608 struct rpc_task_setup task_setup = {
4609 .rpc_client = clp->cl_rpcclient,
4610 .rpc_message = &msg,
4611 .callback_ops = &nfs4_get_lease_time_ops,
4612 .callback_data = &data
4613 };
4614 int status;
4615
2050f0cc
AA		 4616 dprintk("--> %s\n", __func__);
4617 task = rpc_run_task(&task_setup);
4618
4619 if (IS_ERR(task))
4620 status = PTR_ERR(task);
4621 else {
4622 status = task->tk_status;
4623 rpc_put_task(task);
4624 }
4625 dprintk("<-- %s return %d\n", __func__, status);
4626
4627 return status;
4628}
4629
b73dafa7
RL		 4630/*
4631 * Reset a slot table
4632 */
104aeba4
AA		 4633static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4634 int ivalue)
ac72b7b3 4635{
104aeba4 4636 struct nfs4_slot *new = NULL;
b73dafa7 4637 int i;
ac72b7b3
AA		 4638 int ret = 0;
4639
104aeba4
AA		 4640 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4641 max_reqs, tbl->max_slots);
ac72b7b3 4642
104aeba4
AA		 4643 /* Does the newly negotiated max_reqs match the existing slot table? */
4644 if (max_reqs != tbl->max_slots) {
4645 ret = -ENOMEM;
4646 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4647 GFP_NOFS);
104aeba4
AA		 4648 if (!new)
4649 goto out;
4650 ret = 0;
4651 kfree(tbl->slots);
ac72b7b3
AA		 4652 }
4653 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4654 if (new) {
4655 tbl->slots = new;
4656 tbl->max_slots = max_reqs;
4657 }
4658 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4659 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4660 spin_unlock(&tbl->slot_tbl_lock);
4661 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4662 tbl, tbl->slots, tbl->max_slots);
4663out:
4664 dprintk("<-- %s: return %d\n", __func__, ret);
4665 return ret;
4666}
4667
b73dafa7
RL		 4668/*
4669 * Reset the forechannel and backchannel slot tables
4670 */
4671static int nfs4_reset_slot_tables(struct nfs4_session *session)
4672{
4673 int status;
4674
4675 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4676 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4677 if (status)
4678 return status;
4679
4680 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4681 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4682 return status;
4683}
4684
f8625a6a
RL		 4685/* Destroy the slot table */
4686static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4687{
4688 if (session->fc_slot_table.slots != NULL) {
4689 kfree(session->fc_slot_table.slots);
4690 session->fc_slot_table.slots = NULL;
4691 }
4692 if (session->bc_slot_table.slots != NULL) {
4693 kfree(session->bc_slot_table.slots);
4694 session->bc_slot_table.slots = NULL;
4695 }
4696 return;
4697}
4698
fc931582
AA		 4699/*
4700 * Initialize slot table
4701 */
050047ce
RL		 4702static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4703 int max_slots, int ivalue)
fc931582 4704{
fc931582
AA		 4705 struct nfs4_slot *slot;
4706 int ret = -ENOMEM;
4707
4708 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4709
050047ce 4710 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4711
8535b2be 4712 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4713 if (!slot)
4714 goto out;
fc931582
AA		 4715 ret = 0;
4716
4717 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4718 tbl->max_slots = max_slots;
4719 tbl->slots = slot;
4720 tbl->highest_used_slotid = -1; /* no slot is currently used */
4721 spin_unlock(&tbl->slot_tbl_lock);
4722 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4723 tbl, tbl->slots, tbl->max_slots);
4724out:
4725 dprintk("<-- %s: return %d\n", __func__, ret);
4726 return ret;
fc931582
AA		 4727}
4728
050047ce
RL		 4729/*
4730 * Initialize the forechannel and backchannel tables
4731 */
4732static int nfs4_init_slot_tables(struct nfs4_session *session)
4733{
f26468fb
TM		 4734 struct nfs4_slot_table *tbl;
4735 int status = 0;
050047ce 4736
f26468fb
TM		 4737 tbl = &session->fc_slot_table;
4738 if (tbl->slots == NULL) {
4739 status = nfs4_init_slot_table(tbl,
4740 session->fc_attrs.max_reqs, 1);
4741 if (status)
4742 return status;
4743 }
050047ce 4744
f26468fb
TM		 4745 tbl = &session->bc_slot_table;
4746 if (tbl->slots == NULL) {
4747 status = nfs4_init_slot_table(tbl,
4748 session->bc_attrs.max_reqs, 0);
4749 if (status)
4750 nfs4_destroy_slot_tables(session);
4751 }
f8625a6a
RL		 4752
4753 return status;
557134a3
AA		 4754}
4755
4756struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4757{
4758 struct nfs4_session *session;
4759 struct nfs4_slot_table *tbl;
4760
8535b2be 4761 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4762 if (!session)
4763 return NULL;
76db6d95 4764
ea028ac9 4765 init_completion(&session->complete);
76db6d95 4766
557134a3 4767 tbl = &session->fc_slot_table;
9dfdf404 4768 tbl->highest_used_slotid = -1;
557134a3 4769 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4770 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4771
4772 tbl = &session->bc_slot_table;
9dfdf404 4773 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4774 spin_lock_init(&tbl->slot_tbl_lock);
4775 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4776
1055d76d
TM		 4777 session->session_state = 1<<NFS4_SESSION_INITING;
4778
557134a3
AA		 4779 session->clp = clp;
4780 return session;
4781}
4782
4783void nfs4_destroy_session(struct nfs4_session *session)
4784{
5a0ffe54
AA		 4785 nfs4_proc_destroy_session(session);
4786 dprintk("%s Destroy backchannel for xprt %p\n",
4787 __func__, session->clp->cl_rpcclient->cl_xprt);
4788 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4789 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4790 nfs4_destroy_slot_tables(session);
557134a3
AA		 4791 kfree(session);
4792}
4793
fc931582
AA		 4794/*
4795 * Initialize the values to be used by the client in CREATE_SESSION
4796 * If nfs4_init_session set the fore channel request and response sizes,
4797 * use them.
4798 *
4799 * Set the back channel max_resp_sz_cached to zero to force the client to
4800 * always set csa_cachethis to FALSE because the current implementation
4801 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4802 */
4803static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4804{
4805 struct nfs4_session *session = args->client->cl_session;
4806 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4807 mxresp_sz = session->fc_attrs.max_resp_sz;
4808
4809 if (mxrqst_sz == 0)
4810 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4811 if (mxresp_sz == 0)
4812 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4813 /* Fore channel attributes */
4814 args->fc_attrs.headerpadsz = 0;
4815 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4816 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4817 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4818 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4819
4820 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4821 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4822 __func__,
4823 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4824 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4825
4826 /* Back channel attributes */
4827 args->bc_attrs.headerpadsz = 0;
4828 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4829 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4830 args->bc_attrs.max_resp_sz_cached = 0;
4831 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4832 args->bc_attrs.max_reqs = 1;
4833
4834 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4835 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4836 __func__,
4837 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4838 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4839 args->bc_attrs.max_reqs);
4840}
4841
8d35301d
AA		 4842static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4843{
4844 if (rcvd <= sent)
4845 return 0;
4846 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4847 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4848 return -EINVAL;
4849}
4850
4851#define _verify_fore_channel_attr(_name_) \
4852 _verify_channel_attr("fore", #_name_, \
4853 args->fc_attrs._name_, \
4854 session->fc_attrs._name_)
4855
4856#define _verify_back_channel_attr(_name_) \
4857 _verify_channel_attr("back", #_name_, \
4858 args->bc_attrs._name_, \
4859 session->bc_attrs._name_)
4860
4861/*
4862 * The server is not allowed to increase the fore channel header pad size,
4863 * maximum response size, or maximum number of operations.
4864 *
4865 * The back channel attributes are only negotiatied down: We send what the
4866 * (back channel) server insists upon.
4867 */
4868static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4869 struct nfs4_session *session)
4870{
4871 int ret = 0;
4872
4873 ret |= _verify_fore_channel_attr(headerpadsz);
4874 ret |= _verify_fore_channel_attr(max_resp_sz);
4875 ret |= _verify_fore_channel_attr(max_ops);
4876
4877 ret |= _verify_back_channel_attr(headerpadsz);
4878 ret |= _verify_back_channel_attr(max_rqst_sz);
4879 ret |= _verify_back_channel_attr(max_resp_sz);
4880 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4881 ret |= _verify_back_channel_attr(max_ops);
4882 ret |= _verify_back_channel_attr(max_reqs);
4883
4884 return ret;
4885}
4886
fc931582
AA		 4887static int _nfs4_proc_create_session(struct nfs_client *clp)
4888{
4889 struct nfs4_session *session = clp->cl_session;
4890 struct nfs41_create_session_args args = {
4891 .client = clp,
4892 .cb_program = NFS4_CALLBACK,
4893 };
4894 struct nfs41_create_session_res res = {
4895 .client = clp,
4896 };
4897 struct rpc_message msg = {
4898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4899 .rpc_argp = &args,
4900 .rpc_resp = &res,
4901 };
4902 int status;
4903
4904 nfs4_init_channel_attrs(&args);
0f91421e 4905 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4906
4907 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4908
8d35301d
AA		 4909 if (!status)
4910 /* Verify the session's negotiated channel_attrs values */
4911 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4912 if (!status) {
4913 /* Increment the clientid slot sequence id */
4914 clp->cl_seqid++;
4915 }
4916
4917 return status;
4918}
4919
4920/*
4921 * Issues a CREATE_SESSION operation to the server.
4922 * It is the responsibility of the caller to verify the session is
4923 * expired before calling this routine.
4924 */
f26468fb 4925int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4926{
4927 int status;
4928 unsigned *ptr;
fc931582
AA		 4929 struct nfs4_session *session = clp->cl_session;
4930
4931 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4932
4933 status = _nfs4_proc_create_session(clp);
4934 if (status)
4935 goto out;
4936
f26468fb
TM		 4937 /* Init and reset the fore channel */
4938 status = nfs4_init_slot_tables(session);
4939 dprintk("slot table initialization returned %d\n", status);
4940 if (status)
4941 goto out;
4942 status = nfs4_reset_slot_tables(session);
4943 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4944 if (status)
4945 goto out;
4946
4947 ptr = (unsigned *)&session->sess_id.data[0];
4948 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4949 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4950out:
4951 dprintk("<-- %s\n", __func__);
4952 return status;
4953}
4954
0f3e66c6
AA		 4955/*
4956 * Issue the over-the-wire RPC DESTROY_SESSION.
4957 * The caller must serialize access to this routine.
4958 */
4959int nfs4_proc_destroy_session(struct nfs4_session *session)
4960{
4961 int status = 0;
4962 struct rpc_message msg;
4963
4964 dprintk("--> nfs4_proc_destroy_session\n");
4965
4966 /* session is still being setup */
4967 if (session->clp->cl_cons_state != NFS_CS_READY)
4968 return status;
4969
4970 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4971 msg.rpc_argp = session;
4972 msg.rpc_resp = NULL;
4973 msg.rpc_cred = NULL;
4974 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4975
4976 if (status)
4977 printk(KERN_WARNING
4978 "Got error %d from the server on DESTROY_SESSION. "
4979 "Session has been destroyed regardless...\n", status);
4980
4981 dprintk("<-- nfs4_proc_destroy_session\n");
4982 return status;
4983}
4984
fccba804
TM		 4985int nfs4_init_session(struct nfs_server *server)
4986{
4987 struct nfs_client *clp = server->nfs_client;
2449ea2e 4988 struct nfs4_session *session;
68bf05ef 4989 unsigned int rsize, wsize;
fccba804
TM		 4990 int ret;
4991
4992 if (!nfs4_has_session(clp))
4993 return 0;
4994
1055d76d
TM		 4995 session = clp->cl_session;
4996 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
4997 return 0;
4998
68bf05ef
AA		 4999 rsize = server->rsize;
5000 if (rsize == 0)
5001 rsize = NFS_MAX_FILE_IO_SIZE;
5002 wsize = server->wsize;
5003 if (wsize == 0)
5004 wsize = NFS_MAX_FILE_IO_SIZE;
5005
68bf05ef
AA		 5006 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5007 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5008
fccba804
TM		 5009 ret = nfs4_recover_expired_lease(server);
5010 if (!ret)
5011 ret = nfs4_check_client_ready(clp);
5012 return ret;
5013}
5014
fc01cea9
AA		 5015/*
5016 * Renew the cl_session lease.
5017 */
d5f8d3fe
TM		 5018struct nfs4_sequence_data {
5019 struct nfs_client *clp;
5020 struct nfs4_sequence_args args;
5021 struct nfs4_sequence_res res;
5022};
5023
dc96aef9
AB		 5024static void nfs41_sequence_release(void *data)
5025{
d5f8d3fe
TM		 5026 struct nfs4_sequence_data *calldata = data;
5027 struct nfs_client *clp = calldata->clp;
dc96aef9 5028
7135840f
AB		 5029 if (atomic_read(&clp->cl_count) > 1)
5030 nfs4_schedule_state_renewal(clp);
5031 nfs_put_client(clp);
d5f8d3fe 5032 kfree(calldata);
dc96aef9
AB		 5033}
5034
aa5190d0
TM		 5035static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5036{
5037 switch(task->tk_status) {
5038 case -NFS4ERR_DELAY:
aa5190d0
TM		 5039 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5040 return -EAGAIN;
5041 default:
5042 nfs4_schedule_state_recovery(clp);
5043 }
5044 return 0;
5045}
5046
dc96aef9 5047static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5048{
d5f8d3fe
TM		 5049 struct nfs4_sequence_data *calldata = data;
5050 struct nfs_client *clp = calldata->clp;
fc01cea9 5051
14516c3a
TM		 5052 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5053 return;
fc01cea9
AA		 5054
5055 if (task->tk_status < 0) {
5056 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5057 if (atomic_read(&clp->cl_count) == 1)
5058 goto out;
fc01cea9 5059
aa5190d0
TM		 5060 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5061 rpc_restart_call_prepare(task);
fc01cea9
AA		 5062 return;
5063 }
5064 }
fc01cea9 5065 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5066out:
fc01cea9
AA		 5067 dprintk("<-- %s\n", __func__);
5068}
5069
5070static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5071{
d5f8d3fe
TM		 5072 struct nfs4_sequence_data *calldata = data;
5073 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5074 struct nfs4_sequence_args *args;
5075 struct nfs4_sequence_res *res;
5076
fc01cea9
AA		 5077 args = task->tk_msg.rpc_argp;
5078 res = task->tk_msg.rpc_resp;
5079
035168ab 5080 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5081 return;
5082 rpc_call_start(task);
5083}
5084
5085static const struct rpc_call_ops nfs41_sequence_ops = {
5086 .rpc_call_done = nfs41_sequence_call_done,
5087 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5088 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5089};
5090
71ac6da9 5091static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5092{
d5f8d3fe 5093 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5094 struct rpc_message msg = {
5095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5096 .rpc_cred = cred,
5097 };
71ac6da9
TM		 5098 struct rpc_task_setup task_setup_data = {
5099 .rpc_client = clp->cl_rpcclient,
5100 .rpc_message = &msg,
5101 .callback_ops = &nfs41_sequence_ops,
5102 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5103 };
fc01cea9 5104
7135840f 5105 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5106 return ERR_PTR(-EIO);
dfb4f309 5107 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5108 if (calldata == NULL) {
7135840f 5109 nfs_put_client(clp);
71ac6da9 5110 return ERR_PTR(-ENOMEM);
fc01cea9 5111 }
d5f8d3fe
TM		 5112 msg.rpc_argp = &calldata->args;
5113 msg.rpc_resp = &calldata->res;
5114 calldata->clp = clp;
71ac6da9 5115 task_setup_data.callback_data = calldata;
fc01cea9 5116
71ac6da9
TM		 5117 return rpc_run_task(&task_setup_data);
5118}
5119
5120static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5121{
5122 struct rpc_task *task;
5123 int ret = 0;
5124
5125 task = _nfs41_proc_sequence(clp, cred);
5126 if (IS_ERR(task))
5127 ret = PTR_ERR(task);
5128 else
5129 rpc_put_task(task);
5130 dprintk("<-- %s status=%d\n", __func__, ret);
5131 return ret;
5132}
5133
5134static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5135{
5136 struct rpc_task *task;
5137 int ret;
5138
5139 task = _nfs41_proc_sequence(clp, cred);
5140 if (IS_ERR(task)) {
5141 ret = PTR_ERR(task);
5142 goto out;
5143 }
5144 ret = rpc_wait_for_completion_task(task);
5145 if (!ret)
5146 ret = task->tk_status;
5147 rpc_put_task(task);
5148out:
5149 dprintk("<-- %s status=%d\n", __func__, ret);
5150 return ret;
fc01cea9
AA		 5151}
5152
fce5c838
RL		 5153struct nfs4_reclaim_complete_data {
5154 struct nfs_client *clp;
5155 struct nfs41_reclaim_complete_args arg;
5156 struct nfs41_reclaim_complete_res res;
5157};
5158
5159static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5160{
5161 struct nfs4_reclaim_complete_data *calldata = data;
5162
b257957e 5163 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5164 if (nfs41_setup_sequence(calldata->clp->cl_session,
5165 &calldata->arg.seq_args,
fce5c838
RL		 5166 &calldata->res.seq_res, 0, task))
5167 return;
5168
5169 rpc_call_start(task);
5170}
5171
aa5190d0
TM		 5172static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5173{
5174 switch(task->tk_status) {
5175 case 0:
5176 case -NFS4ERR_COMPLETE_ALREADY:
5177 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5178 break;
5179 case -NFS4ERR_DELAY:
aa5190d0
TM		 5180 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5181 return -EAGAIN;
5182 default:
5183 nfs4_schedule_state_recovery(clp);
5184 }
5185 return 0;
5186}
5187
fce5c838
RL		 5188static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5189{
5190 struct nfs4_reclaim_complete_data *calldata = data;
5191 struct nfs_client *clp = calldata->clp;
5192 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5193
5194 dprintk("--> %s\n", __func__);
14516c3a
TM		 5195 if (!nfs41_sequence_done(task, res))
5196 return;
fce5c838 5197
aa5190d0
TM		 5198 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5199 rpc_restart_call_prepare(task);
5200 return;
5201 }
fce5c838
RL		 5202 dprintk("<-- %s\n", __func__);
5203}
5204
5205static void nfs4_free_reclaim_complete_data(void *data)
5206{
5207 struct nfs4_reclaim_complete_data *calldata = data;
5208
5209 kfree(calldata);
5210}
5211
5212static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5213 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5214 .rpc_call_done = nfs4_reclaim_complete_done,
5215 .rpc_release = nfs4_free_reclaim_complete_data,
5216};
5217
5218/*
5219 * Issue a global reclaim complete.
5220 */
5221static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5222{
5223 struct nfs4_reclaim_complete_data *calldata;
5224 struct rpc_task *task;
5225 struct rpc_message msg = {
5226 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5227 };
5228 struct rpc_task_setup task_setup_data = {
5229 .rpc_client = clp->cl_rpcclient,
5230 .rpc_message = &msg,
5231 .callback_ops = &nfs4_reclaim_complete_call_ops,
5232 .flags = RPC_TASK_ASYNC,
5233 };
5234 int status = -ENOMEM;
5235
5236 dprintk("--> %s\n", __func__);
8535b2be 5237 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5238 if (calldata == NULL)
5239 goto out;
5240 calldata->clp = clp;
5241 calldata->arg.one_fs = 0;
fce5c838
RL		 5242
5243 msg.rpc_argp = &calldata->arg;
5244 msg.rpc_resp = &calldata->res;
5245 task_setup_data.callback_data = calldata;
5246 task = rpc_run_task(&task_setup_data);
acf82b85 5247 if (IS_ERR(task)) {
fce5c838 5248 status = PTR_ERR(task);
acf82b85
DC		 5249 goto out;
5250 }
fce5c838 5251 rpc_put_task(task);
acf82b85 5252 return 0;
fce5c838
RL		 5253out:
5254 dprintk("<-- %s status=%d\n", __func__, status);
5255 return status;
5256}
557134a3
AA		 5257#endif /* CONFIG_NFS_V4_1 */
5258
591d71cb 5259struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5260 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5261 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5262 .recover_open = nfs4_open_reclaim,
5263 .recover_lock = nfs4_lock_reclaim,
591d71cb 5264 .establish_clid = nfs4_init_clientid,
90a16617 5265 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5266};
5267
591d71cb
AA		 5268#if defined(CONFIG_NFS_V4_1)
5269struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5270 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5271 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5272 .recover_open = nfs4_open_reclaim,
5273 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5274 .establish_clid = nfs41_init_clientid,
b4b82607 5275 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5276 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5277};
5278#endif /* CONFIG_NFS_V4_1 */
5279
5280struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5281 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5282 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5283 .recover_open = nfs4_open_expired,
5284 .recover_lock = nfs4_lock_expired,
5285 .establish_clid = nfs4_init_clientid,
90a16617 5286 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5287};
5288
5289#if defined(CONFIG_NFS_V4_1)
5290struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5291 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5292 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5293 .recover_open = nfs4_open_expired,
5294 .recover_lock = nfs4_lock_expired,
4d643d1d 5295 .establish_clid = nfs41_init_clientid,
b4b82607 5296 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5297};
591d71cb 5298#endif /* CONFIG_NFS_V4_1 */
1da177e4 5299
29fba38b
BH		 5300struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5301 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5302 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5303 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5304};
5305
5306#if defined(CONFIG_NFS_V4_1)
5307struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5308 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5309 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5310 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5311};
5312#endif
5313
97dc1359
TM		 5314static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5315 .minor_version = 0,
5316 .call_sync = _nfs4_call_sync,
e047a10c 5317 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5318 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5319 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5320 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5321};
5322
5323#if defined(CONFIG_NFS_V4_1)
5324static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5325 .minor_version = 1,
5326 .call_sync = _nfs4_call_sync_session,
e047a10c 5327 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5328 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5329 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5330 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5331};
5332#endif
5333
97dc1359
TM		 5334const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5335 [0] = &nfs_v4_0_minor_ops,
5336#if defined(CONFIG_NFS_V4_1)
5337 [1] = &nfs_v4_1_minor_ops,
5338#endif
5339};
5340
92e1d5be 5341static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5342 .permission = nfs_permission,
5343 .getattr = nfs_getattr,
5344 .setattr = nfs_setattr,
5345 .getxattr = nfs4_getxattr,
5346 .setxattr = nfs4_setxattr,
5347 .listxattr = nfs4_listxattr,
5348};
5349
509de811 5350const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5351 .version = 4, /* protocol version */
5352 .dentry_ops = &nfs4_dentry_operations,
5353 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5354 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5355 .getroot = nfs4_proc_get_root,
5356 .getattr = nfs4_proc_getattr,
5357 .setattr = nfs4_proc_setattr,
2b3de441 5358 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5359 .lookup = nfs4_proc_lookup,
5360 .access = nfs4_proc_access,
5361 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5362 .create = nfs4_proc_create,
5363 .remove = nfs4_proc_remove,
5364 .unlink_setup = nfs4_proc_unlink_setup,
5365 .unlink_done = nfs4_proc_unlink_done,
5366 .rename = nfs4_proc_rename,
d3d4152a
JL		 5367 .rename_setup = nfs4_proc_rename_setup,
5368 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 5369 .link = nfs4_proc_link,
5370 .symlink = nfs4_proc_symlink,
5371 .mkdir = nfs4_proc_mkdir,
5372 .rmdir = nfs4_proc_remove,
5373 .readdir = nfs4_proc_readdir,
5374 .mknod = nfs4_proc_mknod,
5375 .statfs = nfs4_proc_statfs,
5376 .fsinfo = nfs4_proc_fsinfo,
5377 .pathconf = nfs4_proc_pathconf,
e9326dca 5378 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5379 .decode_dirent = nfs4_decode_dirent,
5380 .read_setup = nfs4_proc_read_setup,
ec06c096 5381 .read_done = nfs4_read_done,
1da177e4 5382 .write_setup = nfs4_proc_write_setup,
788e7a89 5383 .write_done = nfs4_write_done,
1da177e4 5384 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5385 .commit_done = nfs4_commit_done,
1da177e4 5386 .lock = nfs4_proc_lock,
e50a1c2e 5387 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5388 .close_context = nfs4_close_context,
2b484297 5389 .open_context = nfs4_atomic_open,
1da177e4
LT		 5390};
5391
5392/*
5393 * Local variables:
5394 * c-basic-offset: 8
5395 * End:
5396 */
Linux 6.x block layer and io_uring tree(s)