projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFS: Add an 'open_context' element to struct nfs_rpc_ops
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
5a0e3ad6 42#include <linux/slab.h>
1da177e4
LT		 43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
1da177e4 48#include <linux/namei.h>
02a913a7 49#include <linux/mount.h>
99fe60d0 50#include <linux/module.h>
5a0ffe54 51#include <linux/sunrpc/bc_xprt.h>
1da177e4 52
4ce79717 53#include "nfs4_fs.h"
1da177e4 54#include "delegation.h"
101070ca 55#include "internal.h"
006ea73e 56#include "iostat.h"
fc931582 57#include "callback.h"
1da177e4
LT		 58
59#define NFSDBG_FACILITY NFSDBG_PROC
60
2066fe89 61#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 62#define NFS4_POLL_RETRY_MAX (15*HZ)
63
a78cb57a
TM		 64#define NFS4_MAX_LOOP_ON_RECOVER (10)
65
cdd4e68b 66struct nfs4_opendata;
864472e9 67static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 68static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 69static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 70static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 71static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
72static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 73static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
74 struct nfs_fattr *fattr, struct iattr *sattr,
75 struct nfs4_state *state);
1da177e4 76
1da177e4 77/* Prevent leaks of NFSv4 errors into userland */
46f72f57 78static int nfs4_map_errors(int err)
1da177e4 79{
52567b03
TM		 80 if (err >= -1000)
81 return err;
82 switch (err) {
83 case -NFS4ERR_RESOURCE:
84 return -EREMOTEIO;
85 default:
1da177e4 86 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 87 __func__, -err);
52567b03 88 break;
1da177e4 89 }
52567b03 90 return -EIO;
1da177e4
LT		 91}
92
93/*
94 * This is our standard bitmap for GETATTR requests.
95 */
96const u32 nfs4_fattr_bitmap[2] = {
97 FATTR4_WORD0_TYPE
98 | FATTR4_WORD0_CHANGE
99 | FATTR4_WORD0_SIZE
100 | FATTR4_WORD0_FSID
101 | FATTR4_WORD0_FILEID,
102 FATTR4_WORD1_MODE
103 | FATTR4_WORD1_NUMLINKS
104 | FATTR4_WORD1_OWNER
105 | FATTR4_WORD1_OWNER_GROUP
106 | FATTR4_WORD1_RAWDEV
107 | FATTR4_WORD1_SPACE_USED
108 | FATTR4_WORD1_TIME_ACCESS
109 | FATTR4_WORD1_TIME_METADATA
110 | FATTR4_WORD1_TIME_MODIFY
111};
112
113const u32 nfs4_statfs_bitmap[2] = {
114 FATTR4_WORD0_FILES_AVAIL
115 | FATTR4_WORD0_FILES_FREE
116 | FATTR4_WORD0_FILES_TOTAL,
117 FATTR4_WORD1_SPACE_AVAIL
118 | FATTR4_WORD1_SPACE_FREE
119 | FATTR4_WORD1_SPACE_TOTAL
120};
121
4ce79717 122const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 123 FATTR4_WORD0_MAXLINK
124 | FATTR4_WORD0_MAXNAME,
125 0
126};
127
128const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
129 | FATTR4_WORD0_MAXREAD
130 | FATTR4_WORD0_MAXWRITE
131 | FATTR4_WORD0_LEASE_TIME,
132 0
133};
134
830b8e33
MN		 135const u32 nfs4_fs_locations_bitmap[2] = {
136 FATTR4_WORD0_TYPE
137 | FATTR4_WORD0_CHANGE
138 | FATTR4_WORD0_SIZE
139 | FATTR4_WORD0_FSID
140 | FATTR4_WORD0_FILEID
141 | FATTR4_WORD0_FS_LOCATIONS,
142 FATTR4_WORD1_MODE
143 | FATTR4_WORD1_NUMLINKS
144 | FATTR4_WORD1_OWNER
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY
151 | FATTR4_WORD1_MOUNTED_ON_FILEID
152};
153
bc4785cd 154static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 155 struct nfs4_readdir_arg *readdir)
156{
0dbb4c67 157 __be32 *start, *p;
1da177e4
LT		 158
159 BUG_ON(readdir->count < 80);
160 if (cookie > 2) {
b7ef1956 161 readdir->cookie = cookie;
1da177e4
LT		 162 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
163 return;
164 }
165
166 readdir->cookie = 0;
167 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
168 if (cookie == 2)
169 return;
170
171 /*
172 * NFSv4 servers do not return entries for '.' and '..'
173 * Therefore, we fake these entries here. We let '.'
174 * have cookie 0 and '..' have cookie 1. Note that
175 * when talking to the server, we always send cookie 0
176 * instead of 1 or 2.
177 */
0dbb4c67 178 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 179
180 if (cookie == 0) {
181 *p++ = xdr_one; /* next */
182 *p++ = xdr_zero; /* cookie, first word */
183 *p++ = xdr_one; /* cookie, second word */
184 *p++ = xdr_one; /* entry len */
185 memcpy(p, ".\0\0\0", 4); /* entry */
186 p++;
187 *p++ = xdr_one; /* bitmap length */
188 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
189 *p++ = htonl(8); /* attribute buffer length */
4e769b93 190 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 191 }
192
193 *p++ = xdr_one; /* next */
194 *p++ = xdr_zero; /* cookie, first word */
195 *p++ = xdr_two; /* cookie, second word */
196 *p++ = xdr_two; /* entry len */
197 memcpy(p, "..\0\0", 4); /* entry */
198 p++;
199 *p++ = xdr_one; /* bitmap length */
200 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
201 *p++ = htonl(8); /* attribute buffer length */
4e769b93 202 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 203
204 readdir->pgbase = (char *)p - (char *)start;
205 readdir->count -= readdir->pgbase;
206 kunmap_atomic(start, KM_USER0);
207}
208
65de872e
TM		 209static int nfs4_wait_clnt_recover(struct nfs_client *clp)
210{
211 int res;
212
213 might_sleep();
214
e005e804 215 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 216 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 217 return res;
218}
219
220static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
221{
222 int res = 0;
223
224 might_sleep();
225
226 if (*timeout <= 0)
227 *timeout = NFS4_POLL_RETRY_MIN;
228 if (*timeout > NFS4_POLL_RETRY_MAX)
229 *timeout = NFS4_POLL_RETRY_MAX;
230 schedule_timeout_killable(*timeout);
231 if (fatal_signal_pending(current))
232 res = -ERESTARTSYS;
233 *timeout <<= 1;
234 return res;
235}
236
237/* This is the error handling routine for processes that are allowed
238 * to sleep.
239 */
240static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
241{
242 struct nfs_client *clp = server->nfs_client;
9e33bed5 243 struct nfs4_state *state = exception->state;
65de872e
TM		 244 int ret = errorcode;
245
246 exception->retry = 0;
247 switch(errorcode) {
248 case 0:
249 return 0;
9e33bed5
TM		 250 case -NFS4ERR_ADMIN_REVOKED:
251 case -NFS4ERR_BAD_STATEID:
252 case -NFS4ERR_OPENMODE:
253 if (state == NULL)
254 break;
255 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 256 goto do_state_recovery;
65de872e 257 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 258 if (state == NULL)
259 break;
260 nfs4_state_mark_reclaim_reboot(clp, state);
261 case -NFS4ERR_STALE_CLIENTID:
65de872e 262 case -NFS4ERR_EXPIRED:
a2c0b9e2 263 goto do_state_recovery;
03391693 264#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 265 case -NFS4ERR_BADSESSION:
266 case -NFS4ERR_BADSLOT:
267 case -NFS4ERR_BAD_HIGH_SLOT:
268 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
269 case -NFS4ERR_DEADSESSION:
270 case -NFS4ERR_SEQ_FALSE_RETRY:
271 case -NFS4ERR_SEQ_MISORDERED:
272 dprintk("%s ERROR: %d Reset session\n", __func__,
273 errorcode);
0b9e2d41 274 nfs4_schedule_state_recovery(clp);
4745e315 275 exception->retry = 1;
b9179237 276 break;
03391693 277#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 278 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 279 if (exception->timeout > HZ) {
280 /* We have retried a decent amount, time to
281 * fail
282 */
283 ret = -EBUSY;
284 break;
285 }
65de872e
TM		 286 case -NFS4ERR_GRACE:
287 case -NFS4ERR_DELAY:
2c643488 288 case -EKEYEXPIRED:
65de872e
TM		 289 ret = nfs4_delay(server->client, &exception->timeout);
290 if (ret != 0)
291 break;
292 case -NFS4ERR_OLD_STATEID:
293 exception->retry = 1;
294 }
295 /* We failed to handle the error */
296 return nfs4_map_errors(ret);
a2c0b9e2
TM		 297do_state_recovery:
298 nfs4_schedule_state_recovery(clp);
299 ret = nfs4_wait_clnt_recover(clp);
300 if (ret == 0)
301 exception->retry = 1;
302 return ret;
65de872e
TM		 303}
304
305
452e9352 306static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 307{
1da177e4
LT		 308 spin_lock(&clp->cl_lock);
309 if (time_before(clp->cl_last_renewal,timestamp))
310 clp->cl_last_renewal = timestamp;
311 spin_unlock(&clp->cl_lock);
312}
313
452e9352
TM		 314static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
315{
316 do_renew_lease(server->nfs_client, timestamp);
317}
318
cccef3b9
AA		 319#if defined(CONFIG_NFS_V4_1)
320
e2c4ab3c
AA		 321/*
322 * nfs4_free_slot - free a slot and efficiently update slot table.
323 *
324 * freeing a slot is trivially done by clearing its respective bit
325 * in the bitmap.
326 * If the freed slotid equals highest_used_slotid we want to update it
327 * so that the server would be able to size down the slot table if needed,
328 * otherwise we know that the highest_used_slotid is still in use.
329 * When updating highest_used_slotid there may be "holes" in the bitmap
330 * so we need to scan down from highest_used_slotid to 0 looking for the now
331 * highest slotid in use.
332 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 333 *
334 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 335 */
336static void
337nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
338{
339 int slotid = free_slotid;
340
e2c4ab3c
AA		 341 /* clear used bit in bitmap */
342 __clear_bit(slotid, tbl->used_slots);
343
344 /* update highest_used_slotid when it is freed */
345 if (slotid == tbl->highest_used_slotid) {
346 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 347 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 348 tbl->highest_used_slotid = slotid;
349 else
350 tbl->highest_used_slotid = -1;
351 }
e2c4ab3c
AA		 352 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
353 free_slotid, tbl->highest_used_slotid);
354}
355
3bfb0fc5
AB		 356/*
357 * Signal state manager thread if session is drained
358 */
359static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
360{
689cf5c1
AB		 361 struct rpc_task *task;
362
a2118c33 363 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 364 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
365 if (task)
366 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 367 return;
368 }
369
370 if (ses->fc_slot_table.highest_used_slotid != -1)
371 return;
372
373 dprintk("%s COMPLETE: Session Drained\n", __func__);
374 complete(&ses->complete);
375}
376
d185a334 377static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 378{
379 struct nfs4_slot_table *tbl;
380
d185a334 381 tbl = &res->sr_session->fc_slot_table;
13615871 382 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 383 /* just wake up the next guy waiting since
384 * we may have not consumed a slot after all */
691daf3b 385 dprintk("%s: No slot\n", __func__);
35dc1d74 386 return;
13615871 387 }
ea028ac9 388
35dc1d74
TM		 389 spin_lock(&tbl->slot_tbl_lock);
390 nfs4_free_slot(tbl, res->sr_slotid);
d185a334 391 nfs41_check_drain_session_complete(res->sr_session);
35dc1d74
TM		 392 spin_unlock(&tbl->slot_tbl_lock);
393 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 394}
395
14516c3a 396static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 397{
398 unsigned long timestamp;
399 struct nfs4_slot_table *tbl;
400 struct nfs4_slot *slot;
14516c3a 401 struct nfs_client *clp;
b0df806c
AA		 402
403 /*
404 * sr_status remains 1 if an RPC level error occurred. The server
405 * may or may not have processed the sequence operation..
406 * Proceed as if the server received and processed the sequence
407 * operation.
408 */
409 if (res->sr_status == 1)
410 res->sr_status = NFS_OK;
411
412 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
413 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
414 goto out;
415
14516c3a
TM		 416 tbl = &res->sr_session->fc_slot_table;
417 slot = tbl->slots + res->sr_slotid;
418
691daf3b 419 /* Check the SEQUENCE operation status */
14516c3a
TM		 420 switch (res->sr_status) {
421 case 0:
b0df806c
AA		 422 /* Update the slot's sequence and clientid lease timer */
423 ++slot->seq_nr;
424 timestamp = res->sr_renewal_time;
14516c3a 425 clp = res->sr_session->clp;
452e9352 426 do_renew_lease(clp, timestamp);
0629e370 427 /* Check sequence flags */
7135840f
AB		 428 if (atomic_read(&clp->cl_count) > 1)
429 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
14516c3a
TM		 430 break;
431 case -NFS4ERR_DELAY:
432 /* The server detected a resend of the RPC call and
433 * returned NFS4ERR_DELAY as per Section 2.10.6.2
434 * of RFC5661.
435 */
436 dprintk("%s: slot=%d seq=%d: Operation in progress\n",
437 __func__, res->sr_slotid, slot->seq_nr);
438 goto out_retry;
439 default:
440 /* Just update the slot sequence no. */
441 ++slot->seq_nr;
b0df806c
AA		 442 }
443out:
444 /* The session may be reset by one of the error handlers. */
445 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 446 nfs41_sequence_free_slot(res);
14516c3a
TM		 447 return 1;
448out_retry:
d05dd4e9 449 if (!rpc_restart_call(task))
14516c3a
TM		 450 goto out;
451 rpc_delay(task, NFS4_POLL_RETRY_MAX);
452 return 0;
b0df806c
AA		 453}
454
14516c3a
TM		 455static int nfs4_sequence_done(struct rpc_task *task,
456 struct nfs4_sequence_res *res)
df896455 457{
14516c3a
TM		 458 if (res->sr_session == NULL)
459 return 1;
460 return nfs41_sequence_done(task, res);
df896455
TM		 461}
462
510b8175
BH		 463/*
464 * nfs4_find_slot - efficiently look for a free slot
465 *
466 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
467 * If found, we mark the slot as used, update the highest_used_slotid,
468 * and respectively set up the sequence operation args.
469 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 470 *
471 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 472 */
473static u8
40ead580 474nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 475{
476 int slotid;
477 u8 ret_id = NFS4_MAX_SLOT_TABLE;
478 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
479
510b8175
BH		 480 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
481 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
482 tbl->max_slots);
483 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
484 if (slotid >= tbl->max_slots)
485 goto out;
486 __set_bit(slotid, tbl->used_slots);
487 if (slotid > tbl->highest_used_slotid)
488 tbl->highest_used_slotid = slotid;
489 ret_id = slotid;
490out:
491 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
492 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 493 return ret_id;
494}
495
ce5039c1
AA		 496static int nfs41_setup_sequence(struct nfs4_session *session,
497 struct nfs4_sequence_args *args,
498 struct nfs4_sequence_res *res,
499 int cache_reply,
500 struct rpc_task *task)
501{
fbcd4abc
AA		 502 struct nfs4_slot *slot;
503 struct nfs4_slot_table *tbl;
504 u8 slotid;
505
506 dprintk("--> %s\n", __func__);
ce5039c1
AA		 507 /* slot already allocated? */
508 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
509 return 0;
510
ce5039c1 511 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 512 tbl = &session->fc_slot_table;
513
514 spin_lock(&tbl->slot_tbl_lock);
a2118c33 515 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 516 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 517 /*
518 * The state manager will wait until the slot table is empty.
519 * Schedule the reset thread
520 */
05f0d236 521 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 522 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 523 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 524 return -EAGAIN;
b069d94a
AA		 525 }
526
689cf5c1
AB		 527 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
528 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
529 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
530 spin_unlock(&tbl->slot_tbl_lock);
531 dprintk("%s enforce FIFO order\n", __func__);
532 return -EAGAIN;
533 }
534
40ead580 535 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 536 if (slotid == NFS4_MAX_SLOT_TABLE) {
537 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
538 spin_unlock(&tbl->slot_tbl_lock);
539 dprintk("<-- %s: no free slots\n", __func__);
540 return -EAGAIN;
541 }
542 spin_unlock(&tbl->slot_tbl_lock);
543
689cf5c1 544 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 545 slot = tbl->slots + slotid;
99fe60d0 546 args->sa_session = session;
fbcd4abc
AA		 547 args->sa_slotid = slotid;
548 args->sa_cache_this = cache_reply;
549
550 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
551
99fe60d0 552 res->sr_session = session;
fbcd4abc
AA		 553 res->sr_slotid = slotid;
554 res->sr_renewal_time = jiffies;
2a6e26cd 555 res->sr_status_flags = 0;
fbcd4abc
AA		 556 /*
557 * sr_status is only set in decode_sequence, and so will remain
558 * set to 1 if an rpc level failure occurs.
559 */
560 res->sr_status = 1;
ce5039c1
AA		 561 return 0;
562}
563
035168ab 564int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 565 struct nfs4_sequence_args *args,
566 struct nfs4_sequence_res *res,
567 int cache_reply,
568 struct rpc_task *task)
569{
035168ab 570 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 571 int ret = 0;
572
035168ab
TM		 573 if (session == NULL) {
574 args->sa_session = NULL;
575 res->sr_session = NULL;
576 goto out;
577 }
578
ce5039c1 579 dprintk("--> %s clp %p session %p sr_slotid %d\n",
035168ab 580 __func__, session->clp, session, res->sr_slotid);
ce5039c1 581
035168ab 582 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 583 task);
ce5039c1
AA		 584out:
585 dprintk("<-- %s status=%d\n", __func__, ret);
586 return ret;
587}
588
589struct nfs41_call_sync_data {
035168ab 590 const struct nfs_server *seq_server;
ce5039c1
AA		 591 struct nfs4_sequence_args *seq_args;
592 struct nfs4_sequence_res *seq_res;
593 int cache_reply;
594};
595
596static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
597{
598 struct nfs41_call_sync_data *data = calldata;
599
035168ab
TM		 600 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
601
602 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 603 data->seq_res, data->cache_reply, task))
604 return;
605 rpc_call_start(task);
606}
607
b257957e
AB		 608static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
609{
610 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
611 nfs41_call_sync_prepare(task, calldata);
612}
613
69ab40c4
AA		 614static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
615{
616 struct nfs41_call_sync_data *data = calldata;
617
14516c3a 618 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 619}
620
ce5039c1
AA		 621struct rpc_call_ops nfs41_call_sync_ops = {
622 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 623 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 624};
625
b257957e
AB		 626struct rpc_call_ops nfs41_call_priv_sync_ops = {
627 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
628 .rpc_call_done = nfs41_call_sync_done,
629};
630
035168ab 631static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 632 struct rpc_message *msg,
633 struct nfs4_sequence_args *args,
634 struct nfs4_sequence_res *res,
b257957e
AB		 635 int cache_reply,
636 int privileged)
ce5039c1
AA		 637{
638 int ret;
639 struct rpc_task *task;
640 struct nfs41_call_sync_data data = {
035168ab 641 .seq_server = server,
ce5039c1
AA		 642 .seq_args = args,
643 .seq_res = res,
644 .cache_reply = cache_reply,
645 };
646 struct rpc_task_setup task_setup = {
035168ab 647 .rpc_client = server->client,
ce5039c1
AA		 648 .rpc_message = msg,
649 .callback_ops = &nfs41_call_sync_ops,
650 .callback_data = &data
651 };
652
653 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 654 if (privileged)
655 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 656 task = rpc_run_task(&task_setup);
657 if (IS_ERR(task))
658 ret = PTR_ERR(task);
659 else {
660 ret = task->tk_status;
661 rpc_put_task(task);
662 }
663 return ret;
664}
665
cccef3b9
AA		 666int _nfs4_call_sync_session(struct nfs_server *server,
667 struct rpc_message *msg,
668 struct nfs4_sequence_args *args,
669 struct nfs4_sequence_res *res,
670 int cache_reply)
671{
035168ab 672 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 673}
674
df896455 675#else
14516c3a
TM		 676static int nfs4_sequence_done(struct rpc_task *task,
677 struct nfs4_sequence_res *res)
df896455 678{
14516c3a 679 return 1;
df896455 680}
cccef3b9
AA		 681#endif /* CONFIG_NFS_V4_1 */
682
683int _nfs4_call_sync(struct nfs_server *server,
684 struct rpc_message *msg,
685 struct nfs4_sequence_args *args,
686 struct nfs4_sequence_res *res,
687 int cache_reply)
688{
f3752975 689 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 690 return rpc_call_sync(server->client, msg, 0);
691}
692
693#define nfs4_call_sync(server, msg, args, res, cache_reply) \
97dc1359 694 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
cccef3b9
AA		 695 &(res)->seq_res, (cache_reply))
696
38478b24 697static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 698{
38478b24 699 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 700
38478b24 701 spin_lock(&dir->i_lock);
40d24704
TM		 702 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
703 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 704 nfs_force_lookup_revalidate(dir);
40d24704 705 nfsi->change_attr = cinfo->after;
38478b24 706 spin_unlock(&dir->i_lock);
1da177e4
LT		 707}
708
e56e0b78 709struct nfs4_opendata {
c6d00e63 710 struct kref kref;
e56e0b78
TM		 711 struct nfs_openargs o_arg;
712 struct nfs_openres o_res;
cdd4e68b
TM		 713 struct nfs_open_confirmargs c_arg;
714 struct nfs_open_confirmres c_res;
e56e0b78
TM		 715 struct nfs_fattr f_attr;
716 struct nfs_fattr dir_attr;
ad389da7 717 struct path path;
e56e0b78
TM		 718 struct dentry *dir;
719 struct nfs4_state_owner *owner;
aac00a8d 720 struct nfs4_state *state;
e56e0b78 721 struct iattr attrs;
26e976a8 722 unsigned long timestamp;
3e309914 723 unsigned int rpc_done : 1;
24ac23ab
TM		 724 int rpc_status;
725 int cancelled;
e56e0b78
TM		 726};
727
2ced46c2
TM		 728
729static void nfs4_init_opendata_res(struct nfs4_opendata *p)
730{
731 p->o_res.f_attr = &p->f_attr;
732 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 733 p->o_res.seqid = p->o_arg.seqid;
734 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 735 p->o_res.server = p->o_arg.server;
736 nfs_fattr_init(&p->f_attr);
737 nfs_fattr_init(&p->dir_attr);
578e4585 738 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 739}
740
ad389da7 741static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 742 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 743 const struct iattr *attrs,
744 gfp_t gfp_mask)
e56e0b78 745{
ad389da7 746 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 747 struct inode *dir = parent->d_inode;
748 struct nfs_server *server = NFS_SERVER(dir);
749 struct nfs4_opendata *p;
750
8535b2be 751 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 752 if (p == NULL)
753 goto err;
8535b2be 754 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 755 if (p->o_arg.seqid == NULL)
756 goto err_free;
f6948697
AV		 757 path_get(path);
758 p->path = *path;
e56e0b78
TM		 759 p->dir = parent;
760 p->owner = sp;
761 atomic_inc(&sp->so_count);
762 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 763 p->o_arg.open_flags = flags;
764 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 765 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 766 p->o_arg.id = sp->so_owner_id.id;
ad389da7 767 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 768 p->o_arg.server = server;
769 p->o_arg.bitmask = server->attr_bitmask;
770 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 771 if (flags & O_CREAT) {
772 u32 *s;
773
e56e0b78
TM		 774 p->o_arg.u.attrs = &p->attrs;
775 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 776 s = (u32 *) p->o_arg.u.verifier.data;
777 s[0] = jiffies;
778 s[1] = current->pid;
e56e0b78 779 }
cdd4e68b
TM		 780 p->c_arg.fh = &p->o_res.fh;
781 p->c_arg.stateid = &p->o_res.stateid;
782 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 783 nfs4_init_opendata_res(p);
c6d00e63 784 kref_init(&p->kref);
e56e0b78
TM		 785 return p;
786err_free:
787 kfree(p);
788err:
789 dput(parent);
790 return NULL;
791}
792
c6d00e63 793static void nfs4_opendata_free(struct kref *kref)
e56e0b78 794{
c6d00e63
TM		 795 struct nfs4_opendata *p = container_of(kref,
796 struct nfs4_opendata, kref);
797
798 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 799 if (p->state != NULL)
800 nfs4_put_open_state(p->state);
c6d00e63
TM		 801 nfs4_put_state_owner(p->owner);
802 dput(p->dir);
31f31db1 803 path_put(&p->path);
c6d00e63
TM		 804 kfree(p);
805}
806
807static void nfs4_opendata_put(struct nfs4_opendata *p)
808{
809 if (p != NULL)
810 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 811}
812
06f814a3
TM		 813static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
814{
06f814a3
TM		 815 int ret;
816
06f814a3 817 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 818 return ret;
819}
820
dc0b027d 821static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 822{
823 int ret = 0;
dc0b027d
TM		 824
825 if (open_mode & O_EXCL)
826 goto out;
827 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 828 case FMODE_READ:
88069f77
TM		 829 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
830 && state->n_rdonly != 0;
6ee41268
TM		 831 break;
832 case FMODE_WRITE:
88069f77
TM		 833 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
834 && state->n_wronly != 0;
6ee41268
TM		 835 break;
836 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 837 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
838 && state->n_rdwr != 0;
6ee41268 839 }
dc0b027d 840out:
6ee41268
TM		 841 return ret;
842}
843
dc0b027d 844static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 845{
dc0b027d 846 if ((delegation->type & fmode) != fmode)
aac00a8d 847 return 0;
15c831bf 848 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 849 return 0;
b7391f44 850 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 851 return 1;
852}
853
dc0b027d 854static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 855{
dc0b027d 856 switch (fmode) {
e7616923
TM		 857 case FMODE_WRITE:
858 state->n_wronly++;
859 break;
860 case FMODE_READ:
861 state->n_rdonly++;
862 break;
863 case FMODE_READ|FMODE_WRITE:
864 state->n_rdwr++;
865 }
dc0b027d 866 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 867}
868
dc0b027d 869static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 870{
871 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
872 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
873 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 874 switch (fmode) {
003707c7
TM		 875 case FMODE_READ:
876 set_bit(NFS_O_RDONLY_STATE, &state->flags);
877 break;
878 case FMODE_WRITE:
879 set_bit(NFS_O_WRONLY_STATE, &state->flags);
880 break;
881 case FMODE_READ|FMODE_WRITE:
882 set_bit(NFS_O_RDWR_STATE, &state->flags);
883 }
e7616923
TM		 884}
885
dc0b027d 886static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 887{
8bda4e4c 888 write_seqlock(&state->seqlock);
dc0b027d 889 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 890 write_sequnlock(&state->seqlock);
003707c7
TM		 891}
892
dc0b027d 893static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 894{
8bda4e4c
TM		 895 /*
896 * Protect the call to nfs4_state_set_mode_locked and
897 * serialise the stateid update
898 */
899 write_seqlock(&state->seqlock);
003707c7
TM		 900 if (deleg_stateid != NULL) {
901 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
902 set_bit(NFS_DELEGATED_STATE, &state->flags);
903 }
904 if (open_stateid != NULL)
dc0b027d 905 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 906 write_sequnlock(&state->seqlock);
907 spin_lock(&state->owner->so_lock);
dc0b027d 908 update_open_stateflags(state, fmode);
ec073428 909 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 910}
911
dc0b027d 912static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 913{
914 struct nfs_inode *nfsi = NFS_I(state->inode);
915 struct nfs_delegation *deleg_cur;
916 int ret = 0;
917
dc0b027d 918 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 919
920 rcu_read_lock();
921 deleg_cur = rcu_dereference(nfsi->delegation);
922 if (deleg_cur == NULL)
923 goto no_delegation;
924
925 spin_lock(&deleg_cur->lock);
926 if (nfsi->delegation != deleg_cur ||
dc0b027d 927 (deleg_cur->type & fmode) != fmode)
34310430
TM		 928 goto no_delegation_unlock;
929
930 if (delegation == NULL)
931 delegation = &deleg_cur->stateid;
932 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
933 goto no_delegation_unlock;
934
b7391f44 935 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 936 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 937 ret = 1;
938no_delegation_unlock:
939 spin_unlock(&deleg_cur->lock);
940no_delegation:
941 rcu_read_unlock();
942
943 if (!ret && open_stateid != NULL) {
dc0b027d 944 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 945 ret = 1;
946 }
947
948 return ret;
949}
950
951
dc0b027d 952static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 953{
954 struct nfs_delegation *delegation;
955
956 rcu_read_lock();
957 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 958 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 959 rcu_read_unlock();
960 return;
961 }
962 rcu_read_unlock();
963 nfs_inode_return_delegation(inode);
964}
965
6ee41268 966static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 967{
968 struct nfs4_state *state = opendata->state;
969 struct nfs_inode *nfsi = NFS_I(state->inode);
970 struct nfs_delegation *delegation;
dc0b027d
TM		 971 int open_mode = opendata->o_arg.open_flags & O_EXCL;
972 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 973 nfs4_stateid stateid;
974 int ret = -EAGAIN;
975
aac00a8d 976 for (;;) {
dc0b027d 977 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 978 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 979 if (can_open_cached(state, fmode, open_mode)) {
980 update_open_stateflags(state, fmode);
6ee41268 981 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 982 goto out_return_state;
983 }
984 spin_unlock(&state->owner->so_lock);
985 }
34310430
TM		 986 rcu_read_lock();
987 delegation = rcu_dereference(nfsi->delegation);
988 if (delegation == NULL ||
dc0b027d 989 !can_open_delegated(delegation, fmode)) {
34310430 990 rcu_read_unlock();
aac00a8d 991 break;
34310430 992 }
aac00a8d
TM		 993 /* Save the delegation */
994 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
995 rcu_read_unlock();
af22f94a 996 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 997 if (ret != 0)
998 goto out;
999 ret = -EAGAIN;
34310430
TM		 1000
1001 /* Try to update the stateid using the delegation */
dc0b027d 1002 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1003 goto out_return_state;
aac00a8d 1004 }
aac00a8d
TM		 1005out:
1006 return ERR_PTR(ret);
1007out_return_state:
1008 atomic_inc(&state->count);
1009 return state;
1010}
1011
24ac23ab
TM		 1012static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1013{
1014 struct inode *inode;
1015 struct nfs4_state *state = NULL;
003707c7 1016 struct nfs_delegation *delegation;
1b370bc2 1017 int ret;
24ac23ab 1018
aac00a8d 1019 if (!data->rpc_done) {
6ee41268 1020 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1021 goto out;
1022 }
1023
1b370bc2 1024 ret = -EAGAIN;
24ac23ab 1025 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1026 goto err;
24ac23ab 1027 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1028 ret = PTR_ERR(inode);
03f28e3a 1029 if (IS_ERR(inode))
1b370bc2
TM		 1030 goto err;
1031 ret = -ENOMEM;
24ac23ab
TM		 1032 state = nfs4_get_open_state(inode, data->owner);
1033 if (state == NULL)
1b370bc2 1034 goto err_put_inode;
549d6ed5 1035 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1036 int delegation_flags = 0;
1037
003707c7
TM		 1038 rcu_read_lock();
1039 delegation = rcu_dereference(NFS_I(inode)->delegation);
1040 if (delegation)
1041 delegation_flags = delegation->flags;
1042 rcu_read_unlock();
15c831bf 1043 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1044 nfs_inode_set_delegation(state->inode,
1045 data->owner->so_cred,
1046 &data->o_res);
1047 else
1048 nfs_inode_reclaim_delegation(state->inode,
1049 data->owner->so_cred,
1050 &data->o_res);
1051 }
34310430
TM		 1052
1053 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1054 data->o_arg.fmode);
24ac23ab 1055 iput(inode);
aac00a8d 1056out:
24ac23ab 1057 return state;
1b370bc2
TM		 1058err_put_inode:
1059 iput(inode);
1060err:
1061 return ERR_PTR(ret);
24ac23ab
TM		 1062}
1063
864472e9
TM		 1064static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1065{
1066 struct nfs_inode *nfsi = NFS_I(state->inode);
1067 struct nfs_open_context *ctx;
1068
1069 spin_lock(&state->inode->i_lock);
1070 list_for_each_entry(ctx, &nfsi->open_files, list) {
1071 if (ctx->state != state)
1072 continue;
1073 get_nfs_open_context(ctx);
1074 spin_unlock(&state->inode->i_lock);
1075 return ctx;
1076 }
1077 spin_unlock(&state->inode->i_lock);
1078 return ERR_PTR(-ENOENT);
1079}
1080
6f220ed5
TM		 1081static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1082{
1083 struct nfs4_opendata *opendata;
1084
8535b2be 1085 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1086 if (opendata == NULL)
1087 return ERR_PTR(-ENOMEM);
1088 opendata->state = state;
1089 atomic_inc(&state->count);
1090 return opendata;
1091}
1092
dc0b027d 1093static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1094{
2ced46c2 1095 struct nfs4_state *newstate;
864472e9
TM		 1096 int ret;
1097
dc0b027d
TM		 1098 opendata->o_arg.open_flags = 0;
1099 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1100 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1101 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1102 nfs4_init_opendata_res(opendata);
b257957e 1103 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1104 if (ret != 0)
1105 return ret;
2ced46c2 1106 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1107 if (IS_ERR(newstate))
1108 return PTR_ERR(newstate);
dc0b027d 1109 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1110 *res = newstate;
864472e9
TM		 1111 return 0;
1112}
1113
1114static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1115{
864472e9 1116 struct nfs4_state *newstate;
864472e9
TM		 1117 int ret;
1118
1119 /* memory barrier prior to reading state->n_* */
2ced46c2 1120 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1121 smp_rmb();
1122 if (state->n_rdwr != 0) {
2ced46c2 1123 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1124 if (ret != 0)
1125 return ret;
2ced46c2
TM		 1126 if (newstate != state)
1127 return -ESTALE;
864472e9
TM		 1128 }
1129 if (state->n_wronly != 0) {
2ced46c2 1130 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1131 if (ret != 0)
1132 return ret;
2ced46c2
TM		 1133 if (newstate != state)
1134 return -ESTALE;
864472e9
TM		 1135 }
1136 if (state->n_rdonly != 0) {
2ced46c2 1137 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1138 if (ret != 0)
1139 return ret;
2ced46c2
TM		 1140 if (newstate != state)
1141 return -ESTALE;
864472e9 1142 }
1ac7e2fd
TM		 1143 /*
1144 * We may have performed cached opens for all three recoveries.
1145 * Check if we need to update the current stateid.
1146 */
1147 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1148 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1149 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1150 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1151 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1152 write_sequnlock(&state->seqlock);
1ac7e2fd 1153 }
864472e9
TM		 1154 return 0;
1155}
1156
1da177e4
LT		 1157/*
1158 * OPEN_RECLAIM:
1159 * reclaim state on the server after a reboot.
1da177e4 1160 */
539cd03a 1161static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1162{
1ac7e2fd 1163 struct nfs_delegation *delegation;
864472e9 1164 struct nfs4_opendata *opendata;
dc0b027d 1165 fmode_t delegation_type = 0;
1da177e4
LT		 1166 int status;
1167
6f220ed5
TM		 1168 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1169 if (IS_ERR(opendata))
1170 return PTR_ERR(opendata);
864472e9
TM		 1171 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1172 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1173 rcu_read_lock();
1174 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1175 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1176 delegation_type = delegation->type;
1ac7e2fd 1177 rcu_read_unlock();
864472e9
TM		 1178 opendata->o_arg.u.delegation_type = delegation_type;
1179 status = nfs4_open_recover(opendata, state);
c6d00e63 1180 nfs4_opendata_put(opendata);
1da177e4
LT		 1181 return status;
1182}
1183
539cd03a 1184static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1185{
1186 struct nfs_server *server = NFS_SERVER(state->inode);
1187 struct nfs4_exception exception = { };
1188 int err;
1189 do {
539cd03a 1190 err = _nfs4_do_open_reclaim(ctx, state);
2c643488 1191 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 1192 break;
1193 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1194 } while (exception.retry);
1195 return err;
1196}
1197
864472e9
TM		 1198static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1199{
1200 struct nfs_open_context *ctx;
1201 int ret;
1202
1203 ctx = nfs4_state_find_open_context(state);
1204 if (IS_ERR(ctx))
1205 return PTR_ERR(ctx);
539cd03a 1206 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1207 put_nfs_open_context(ctx);
1208 return ret;
1209}
1210
13437e12 1211static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1212{
e56e0b78 1213 struct nfs4_opendata *opendata;
864472e9 1214 int ret;
1da177e4 1215
6f220ed5
TM		 1216 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1217 if (IS_ERR(opendata))
1218 return PTR_ERR(opendata);
e56e0b78 1219 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1220 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1221 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1222 ret = nfs4_open_recover(opendata, state);
c6d00e63 1223 nfs4_opendata_put(opendata);
864472e9 1224 return ret;
1da177e4
LT		 1225}
1226
13437e12 1227int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1228{
1229 struct nfs4_exception exception = { };
539cd03a 1230 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1231 int err;
1232 do {
13437e12 1233 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1234 switch (err) {
1235 case 0:
965b5d67
TM		 1236 case -ENOENT:
1237 case -ESTALE:
1238 goto out;
bcfa49f6
RL		 1239 case -NFS4ERR_BADSESSION:
1240 case -NFS4ERR_BADSLOT:
1241 case -NFS4ERR_BAD_HIGH_SLOT:
1242 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1243 case -NFS4ERR_DEADSESSION:
1244 nfs4_schedule_state_recovery(
1245 server->nfs_client);
1246 goto out;
1da177e4
LT		 1247 case -NFS4ERR_STALE_CLIENTID:
1248 case -NFS4ERR_STALE_STATEID:
1249 case -NFS4ERR_EXPIRED:
1250 /* Don't recall a delegation if it was lost */
7539bbab 1251 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1252 goto out;
1253 case -ERESTARTSYS:
1254 /*
1255 * The show must go on: exit, but mark the
1256 * stateid as needing recovery.
1257 */
1258 case -NFS4ERR_ADMIN_REVOKED:
1259 case -NFS4ERR_BAD_STATEID:
1260 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1261 case -ENOMEM:
1262 err = 0;
1263 goto out;
1da177e4
LT		 1264 }
1265 err = nfs4_handle_exception(server, err, &exception);
1266 } while (exception.retry);
965b5d67 1267out:
1da177e4
LT		 1268 return err;
1269}
1270
cdd4e68b
TM		 1271static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1272{
1273 struct nfs4_opendata *data = calldata;
1274
1275 data->rpc_status = task->tk_status;
26e976a8 1276 if (data->rpc_status == 0) {
cdd4e68b
TM		 1277 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1278 sizeof(data->o_res.stateid.data));
bb22629e 1279 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1280 renew_lease(data->o_res.server, data->timestamp);
3e309914 1281 data->rpc_done = 1;
26e976a8 1282 }
cdd4e68b
TM		 1283}
1284
1285static void nfs4_open_confirm_release(void *calldata)
1286{
1287 struct nfs4_opendata *data = calldata;
1288 struct nfs4_state *state = NULL;
1289
1290 /* If this request hasn't been cancelled, do nothing */
1291 if (data->cancelled == 0)
1292 goto out_free;
1293 /* In case of error, no cleanup! */
3e309914 1294 if (!data->rpc_done)
cdd4e68b 1295 goto out_free;
cdd4e68b 1296 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1297 if (!IS_ERR(state))
dc0b027d 1298 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1299out_free:
c6d00e63 1300 nfs4_opendata_put(data);
cdd4e68b
TM		 1301}
1302
1303static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1304 .rpc_call_done = nfs4_open_confirm_done,
1305 .rpc_release = nfs4_open_confirm_release,
1306};
1307
1308/*
1309 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1310 */
1311static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1312{
1313 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1314 struct rpc_task *task;
5138fde0
TM		 1315 struct rpc_message msg = {
1316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1317 .rpc_argp = &data->c_arg,
1318 .rpc_resp = &data->c_res,
1319 .rpc_cred = data->owner->so_cred,
1320 };
c970aa85
TM		 1321 struct rpc_task_setup task_setup_data = {
1322 .rpc_client = server->client,
5138fde0 1323 .rpc_message = &msg,
c970aa85
TM		 1324 .callback_ops = &nfs4_open_confirm_ops,
1325 .callback_data = data,
101070ca 1326 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1327 .flags = RPC_TASK_ASYNC,
1328 };
1da177e4
LT		 1329 int status;
1330
c6d00e63 1331 kref_get(&data->kref);
3e309914
TM		 1332 data->rpc_done = 0;
1333 data->rpc_status = 0;
5138fde0 1334 data->timestamp = jiffies;
c970aa85 1335 task = rpc_run_task(&task_setup_data);
7a1218a2 1336 if (IS_ERR(task))
cdd4e68b 1337 return PTR_ERR(task);
cdd4e68b
TM		 1338 status = nfs4_wait_for_completion_rpc_task(task);
1339 if (status != 0) {
1340 data->cancelled = 1;
1341 smp_wmb();
1342 } else
1343 status = data->rpc_status;
e6b3c4db 1344 rpc_put_task(task);
1da177e4
LT		 1345 return status;
1346}
1347
24ac23ab 1348static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1349{
24ac23ab
TM		 1350 struct nfs4_opendata *data = calldata;
1351 struct nfs4_state_owner *sp = data->owner;
5138fde0 1352
24ac23ab
TM		 1353 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1354 return;
aac00a8d
TM		 1355 /*
1356 * Check if we still need to send an OPEN call, or if we can use
1357 * a delegation instead.
1358 */
1359 if (data->state != NULL) {
1360 struct nfs_delegation *delegation;
1361
dc0b027d 1362 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1363 goto out_no_action;
aac00a8d
TM		 1364 rcu_read_lock();
1365 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1366 if (delegation != NULL &&
15c831bf 1367 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1368 rcu_read_unlock();
6ee41268 1369 goto out_no_action;
aac00a8d
TM		 1370 }
1371 rcu_read_unlock();
1372 }
24ac23ab 1373 /* Update sequence id. */
9f958ab8 1374 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1375 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1376 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1377 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1378 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1379 }
26e976a8 1380 data->timestamp = jiffies;
035168ab 1381 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1382 &data->o_arg.seq_args,
1383 &data->o_res.seq_res, 1, task))
1384 return;
5138fde0 1385 rpc_call_start(task);
6ee41268
TM		 1386 return;
1387out_no_action:
1388 task->tk_action = NULL;
1389
24ac23ab 1390}
1da177e4 1391
b257957e
AB		 1392static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1393{
1394 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1395 nfs4_open_prepare(task, calldata);
1396}
1397
24ac23ab
TM		 1398static void nfs4_open_done(struct rpc_task *task, void *calldata)
1399{
1400 struct nfs4_opendata *data = calldata;
1da177e4 1401
24ac23ab 1402 data->rpc_status = task->tk_status;
d898528c 1403
14516c3a
TM		 1404 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1405 return;
d898528c 1406
24ac23ab
TM		 1407 if (task->tk_status == 0) {
1408 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1409 case S_IFREG:
1410 break;
1411 case S_IFLNK:
24ac23ab 1412 data->rpc_status = -ELOOP;
6f926b5b
TM		 1413 break;
1414 case S_IFDIR:
24ac23ab 1415 data->rpc_status = -EISDIR;
6f926b5b
TM		 1416 break;
1417 default:
24ac23ab 1418 data->rpc_status = -ENOTDIR;
6f926b5b 1419 }
26e976a8 1420 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1421 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1422 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1423 }
3e309914 1424 data->rpc_done = 1;
24ac23ab 1425}
6f926b5b 1426
24ac23ab
TM		 1427static void nfs4_open_release(void *calldata)
1428{
1429 struct nfs4_opendata *data = calldata;
1430 struct nfs4_state *state = NULL;
1431
1432 /* If this request hasn't been cancelled, do nothing */
1433 if (data->cancelled == 0)
1434 goto out_free;
1435 /* In case of error, no cleanup! */
3e309914 1436 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1437 goto out_free;
1438 /* In case we need an open_confirm, no cleanup! */
1439 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1440 goto out_free;
24ac23ab 1441 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1442 if (!IS_ERR(state))
dc0b027d 1443 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1444out_free:
c6d00e63 1445 nfs4_opendata_put(data);
24ac23ab
TM		 1446}
1447
1448static const struct rpc_call_ops nfs4_open_ops = {
1449 .rpc_call_prepare = nfs4_open_prepare,
1450 .rpc_call_done = nfs4_open_done,
1451 .rpc_release = nfs4_open_release,
1452};
1453
b257957e
AB		 1454static const struct rpc_call_ops nfs4_recover_open_ops = {
1455 .rpc_call_prepare = nfs4_recover_open_prepare,
1456 .rpc_call_done = nfs4_open_done,
1457 .rpc_release = nfs4_open_release,
1458};
1459
1460static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1461{
1462 struct inode *dir = data->dir->d_inode;
1463 struct nfs_server *server = NFS_SERVER(dir);
1464 struct nfs_openargs *o_arg = &data->o_arg;
1465 struct nfs_openres *o_res = &data->o_res;
1466 struct rpc_task *task;
5138fde0
TM		 1467 struct rpc_message msg = {
1468 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1469 .rpc_argp = o_arg,
1470 .rpc_resp = o_res,
1471 .rpc_cred = data->owner->so_cred,
1472 };
c970aa85
TM		 1473 struct rpc_task_setup task_setup_data = {
1474 .rpc_client = server->client,
5138fde0 1475 .rpc_message = &msg,
c970aa85
TM		 1476 .callback_ops = &nfs4_open_ops,
1477 .callback_data = data,
101070ca 1478 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1479 .flags = RPC_TASK_ASYNC,
1480 };
24ac23ab
TM		 1481 int status;
1482
c6d00e63 1483 kref_get(&data->kref);
3e309914
TM		 1484 data->rpc_done = 0;
1485 data->rpc_status = 0;
2ced46c2 1486 data->cancelled = 0;
b257957e
AB		 1487 if (isrecover)
1488 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1489 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1490 if (IS_ERR(task))
1491 return PTR_ERR(task);
1492 status = nfs4_wait_for_completion_rpc_task(task);
1493 if (status != 0) {
1494 data->cancelled = 1;
1495 smp_wmb();
1496 } else
1497 status = data->rpc_status;
1498 rpc_put_task(task);
1499
1500 return status;
1501}
1502
1503static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1504{
1505 struct inode *dir = data->dir->d_inode;
1506 struct nfs_openres *o_res = &data->o_res;
1507 int status;
1508
1509 status = nfs4_run_open_task(data, 1);
1510 if (status != 0 || !data->rpc_done)
1511 return status;
1512
1513 nfs_refresh_inode(dir, o_res->dir_attr);
1514
1515 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1516 status = _nfs4_proc_open_confirm(data);
1517 if (status != 0)
1518 return status;
1519 }
1520
1521 return status;
1522}
1523
1524/*
1525 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1526 */
1527static int _nfs4_proc_open(struct nfs4_opendata *data)
1528{
1529 struct inode *dir = data->dir->d_inode;
1530 struct nfs_server *server = NFS_SERVER(dir);
1531 struct nfs_openargs *o_arg = &data->o_arg;
1532 struct nfs_openres *o_res = &data->o_res;
1533 int status;
1534
1535 status = nfs4_run_open_task(data, 0);
3e309914 1536 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1537 return status;
1538
56ae19f3
TM		 1539 if (o_arg->open_flags & O_CREAT) {
1540 update_changeattr(dir, &o_res->cinfo);
1541 nfs_post_op_update_inode(dir, o_res->dir_attr);
1542 } else
1543 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1544 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1545 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1546 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1547 status = _nfs4_proc_open_confirm(data);
1da177e4 1548 if (status != 0)
24ac23ab 1549 return status;
1da177e4
LT		 1550 }
1551 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1552 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1553 return 0;
1da177e4
LT		 1554}
1555
10afec90 1556static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1557{
7539bbab 1558 struct nfs_client *clp = server->nfs_client;
a78cb57a 1559 unsigned int loop;
6b30954e 1560 int ret;
58d9714a 1561
a78cb57a 1562 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1563 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1564 if (ret != 0)
a78cb57a 1565 break;
e598d843
TM		 1566 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1567 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1568 break;
58d9714a 1569 nfs4_schedule_state_recovery(clp);
a78cb57a 1570 ret = -EIO;
6b30954e 1571 }
a78cb57a 1572 return ret;
58d9714a
TM		 1573}
1574
1da177e4
LT		 1575/*
1576 * OPEN_EXPIRED:
1577 * reclaim state on the server after a network partition.
1578 * Assumes caller holds the appropriate lock
1579 */
539cd03a 1580static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1581{
e56e0b78 1582 struct nfs4_opendata *opendata;
864472e9 1583 int ret;
1da177e4 1584
6f220ed5
TM		 1585 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1586 if (IS_ERR(opendata))
1587 return PTR_ERR(opendata);
864472e9 1588 ret = nfs4_open_recover(opendata, state);
35d05778 1589 if (ret == -ESTALE)
539cd03a 1590 d_drop(ctx->path.dentry);
c6d00e63 1591 nfs4_opendata_put(opendata);
864472e9 1592 return ret;
1da177e4
LT		 1593}
1594
a9ed2e25 1595static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1596{
539cd03a 1597 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1598 struct nfs4_exception exception = { };
1599 int err;
1600
1601 do {
539cd03a 1602 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1603 switch (err) {
1604 default:
1605 goto out;
1606 case -NFS4ERR_GRACE:
1607 case -NFS4ERR_DELAY:
2c643488 1608 case -EKEYEXPIRED:
a9ed2e25
TM		 1609 nfs4_handle_exception(server, err, &exception);
1610 err = 0;
1611 }
202b50dc 1612 } while (exception.retry);
a9ed2e25 1613out:
202b50dc
TM		 1614 return err;
1615}
1616
1da177e4
LT		 1617static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1618{
1da177e4 1619 struct nfs_open_context *ctx;
864472e9 1620 int ret;
1da177e4 1621
864472e9
TM		 1622 ctx = nfs4_state_find_open_context(state);
1623 if (IS_ERR(ctx))
1624 return PTR_ERR(ctx);
539cd03a 1625 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1626 put_nfs_open_context(ctx);
1627 return ret;
1da177e4
LT		 1628}
1629
aa53ed54
JL		 1630/*
1631 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1632 * fields corresponding to attributes that were used to store the verifier.
1633 * Make sure we clobber those fields in the later setattr call
1634 */
1635static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1636{
1637 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1638 !(sattr->ia_valid & ATTR_ATIME_SET))
1639 sattr->ia_valid |= ATTR_ATIME;
1640
1641 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1642 !(sattr->ia_valid & ATTR_MTIME_SET))
1643 sattr->ia_valid |= ATTR_MTIME;
1644}
1645
1da177e4 1646/*
24ac23ab 1647 * Returns a referenced nfs4_state
1da177e4 1648 */
dc0b027d 1649static 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		 1650{
1651 struct nfs4_state_owner *sp;
1652 struct nfs4_state *state = NULL;
1653 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1654 struct nfs4_opendata *opendata;
aac00a8d 1655 int status;
1da177e4
LT		 1656
1657 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1658 status = -ENOMEM;
1659 if (!(sp = nfs4_get_state_owner(server, cred))) {
1660 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1661 goto out_err;
1662 }
58d9714a
TM		 1663 status = nfs4_recover_expired_lease(server);
1664 if (status != 0)
b4454fe1 1665 goto err_put_state_owner;
aac00a8d 1666 if (path->dentry->d_inode != NULL)
dc0b027d 1667 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1668 status = -ENOMEM;
8535b2be 1669 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1670 if (opendata == NULL)
95d35cb4 1671 goto err_put_state_owner;
1da177e4 1672
aac00a8d
TM		 1673 if (path->dentry->d_inode != NULL)
1674 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1675
24ac23ab 1676 status = _nfs4_proc_open(opendata);
1da177e4 1677 if (status != 0)
c6d00e63 1678 goto err_opendata_put;
1da177e4 1679
24ac23ab 1680 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1681 status = PTR_ERR(state);
1682 if (IS_ERR(state))
c6d00e63 1683 goto err_opendata_put;
0df5dd4a 1684 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1685 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1686
1687 if (opendata->o_arg.open_flags & O_EXCL) {
1688 nfs4_exclusive_attrset(opendata, sattr);
1689
1690 nfs_fattr_init(opendata->o_res.f_attr);
1691 status = nfs4_do_setattr(state->inode, cred,
1692 opendata->o_res.f_attr, sattr,
1693 state);
1694 if (status == 0)
1695 nfs_setattr_update_inode(state->inode, sattr);
1696 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1697 }
c6d00e63 1698 nfs4_opendata_put(opendata);
1da177e4 1699 nfs4_put_state_owner(sp);
1da177e4
LT		 1700 *res = state;
1701 return 0;
c6d00e63
TM		 1702err_opendata_put:
1703 nfs4_opendata_put(opendata);
e56e0b78
TM		 1704err_put_state_owner:
1705 nfs4_put_state_owner(sp);
1da177e4 1706out_err:
1da177e4
LT		 1707 *res = NULL;
1708 return status;
1709}
1710
1711
dc0b027d 1712static 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		 1713{
1714 struct nfs4_exception exception = { };
1715 struct nfs4_state *res;
1716 int status;
1717
1718 do {
dc0b027d 1719 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1720 if (status == 0)
1721 break;
1722 /* NOTE: BAD_SEQID means the server and client disagree about the
1723 * book-keeping w.r.t. state-changing operations
1724 * (OPEN/CLOSE/LOCK/LOCKU...)
1725 * It is actually a sign of a bug on the client or on the server.
1726 *
1727 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1728 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1729 * have unhashed the old state_owner for us, and that we can
1730 * therefore safely retry using a new one. We should still warn
1731 * the user though...
1732 */
1733 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1734 printk(KERN_WARNING "NFS: v4 server %s "
1735 " returned a bad sequence-id error!\n",
1736 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1737 exception.retry = 1;
1738 continue;
1739 }
550f5747
TM		 1740 /*
1741 * BAD_STATEID on OPEN means that the server cancelled our
1742 * state before it received the OPEN_CONFIRM.
1743 * Recover by retrying the request as per the discussion
1744 * on Page 181 of RFC3530.
1745 */
1746 if (status == -NFS4ERR_BAD_STATEID) {
1747 exception.retry = 1;
1748 continue;
1749 }
aac00a8d
TM		 1750 if (status == -EAGAIN) {
1751 /* We must have found a delegation */
1752 exception.retry = 1;
1753 continue;
1754 }
1da177e4
LT		 1755 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1756 status, &exception));
1757 } while (exception.retry);
1758 return res;
1759}
1760
659bfcd6
TM		 1761static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1762 struct nfs_fattr *fattr, struct iattr *sattr,
1763 struct nfs4_state *state)
1da177e4 1764{
3e4f6290 1765 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1766 struct nfs_setattrargs arg = {
3e4f6290 1767 .fh = NFS_FH(inode),
1da177e4
LT		 1768 .iap = sattr,
1769 .server = server,
1770 .bitmask = server->attr_bitmask,
1771 };
1772 struct nfs_setattrres res = {
1773 .fattr = fattr,
1774 .server = server,
1775 };
1776 struct rpc_message msg = {
659bfcd6
TM		 1777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1778 .rpc_argp = &arg,
1779 .rpc_resp = &res,
1780 .rpc_cred = cred,
1da177e4 1781 };
26e976a8 1782 unsigned long timestamp = jiffies;
65e4308d 1783 int status;
1da177e4 1784
0e574af1 1785 nfs_fattr_init(fattr);
1da177e4 1786
3e4f6290
TM		 1787 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1788 /* Use that stateid */
1789 } else if (state != NULL) {
77041ed9 1790 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1791 } else
1da177e4
LT		 1792 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1793
cccef3b9 1794 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1795 if (status == 0 && state != NULL)
1796 renew_lease(server, timestamp);
65e4308d 1797 return status;
1da177e4
LT		 1798}
1799
659bfcd6
TM		 1800static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1801 struct nfs_fattr *fattr, struct iattr *sattr,
1802 struct nfs4_state *state)
1da177e4 1803{
3e4f6290 1804 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1805 struct nfs4_exception exception = { };
1806 int err;
1807 do {
1808 err = nfs4_handle_exception(server,
659bfcd6 1809 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1810 &exception);
1811 } while (exception.retry);
1812 return err;
1813}
1814
1815struct nfs4_closedata {
4a35bd41 1816 struct path path;
1da177e4
LT		 1817 struct inode *inode;
1818 struct nfs4_state *state;
1819 struct nfs_closeargs arg;
1820 struct nfs_closeres res;
516a6af6 1821 struct nfs_fattr fattr;
26e976a8 1822 unsigned long timestamp;
1da177e4
LT		 1823};
1824
963d8fe5 1825static void nfs4_free_closedata(void *data)
9512135d 1826{
963d8fe5
TM		 1827 struct nfs4_closedata *calldata = data;
1828 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1829
1830 nfs4_put_open_state(calldata->state);
1831 nfs_free_seqid(calldata->arg.seqid);
9512135d 1832 nfs4_put_state_owner(sp);
31f31db1 1833 path_put(&calldata->path);
9512135d
TM		 1834 kfree(calldata);
1835}
1836
88069f77
TM		 1837static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1838 fmode_t fmode)
1839{
1840 spin_lock(&state->owner->so_lock);
1841 if (!(fmode & FMODE_READ))
1842 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1843 if (!(fmode & FMODE_WRITE))
1844 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1845 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1846 spin_unlock(&state->owner->so_lock);
1847}
1848
963d8fe5 1849static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1850{
963d8fe5 1851 struct nfs4_closedata *calldata = data;
1da177e4 1852 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1853 struct nfs_server *server = NFS_SERVER(calldata->inode);
1854
14516c3a
TM		 1855 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1856 return;
1da177e4
LT		 1857 /* hmm. we are done with the inode, and in the process of freeing
1858 * the state_owner. we keep this around to process errors
1859 */
1da177e4
LT		 1860 switch (task->tk_status) {
1861 case 0:
45328c35 1862 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1863 renew_lease(server, calldata->timestamp);
88069f77
TM		 1864 nfs4_close_clear_stateid_flags(state,
1865 calldata->arg.fmode);
1da177e4
LT		 1866 break;
1867 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1868 case -NFS4ERR_OLD_STATEID:
1869 case -NFS4ERR_BAD_STATEID:
1da177e4 1870 case -NFS4ERR_EXPIRED:
dc0b027d 1871 if (calldata->arg.fmode == 0)
9e33bed5 1872 break;
1da177e4 1873 default:
72211dbe
TM		 1874 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1875 rpc_restart_call_prepare(task);
1da177e4 1876 }
72211dbe 1877 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1878 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1879}
1880
4ce70ada 1881static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1882{
4ce70ada 1883 struct nfs4_closedata *calldata = data;
9512135d 1884 struct nfs4_state *state = calldata->state;
88069f77 1885 int call_close = 0;
9512135d 1886
963d8fe5 1887 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1888 return;
003707c7 1889
88069f77
TM		 1890 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1891 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1892 spin_lock(&state->owner->so_lock);
003707c7 1893 /* Calculate the change in open mode */
e7616923 1894 if (state->n_rdwr == 0) {
003707c7 1895 if (state->n_rdonly == 0) {
88069f77
TM		 1896 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1897 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1898 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1899 }
1900 if (state->n_wronly == 0) {
88069f77
TM		 1901 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1902 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1903 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1904 }
e7616923 1905 }
4cecb76f 1906 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1907
1908 if (!call_close) {
963d8fe5
TM		 1909 /* Note: exit _without_ calling nfs4_close_done */
1910 task->tk_action = NULL;
9512135d
TM		 1911 return;
1912 }
88069f77
TM		 1913
1914 if (calldata->arg.fmode == 0)
1915 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1916
516a6af6 1917 nfs_fattr_init(calldata->res.fattr);
26e976a8 1918 calldata->timestamp = jiffies;
035168ab 1919 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1920 &calldata->arg.seq_args, &calldata->res.seq_res,
1921 1, task))
1922 return;
5138fde0 1923 rpc_call_start(task);
1da177e4
LT		 1924}
1925
963d8fe5 1926static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1927 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1928 .rpc_call_done = nfs4_close_done,
1929 .rpc_release = nfs4_free_closedata,
1930};
1931
1da177e4
LT		 1932/*
1933 * It is possible for data to be read/written from a mem-mapped file
1934 * after the sys_close call (which hits the vfs layer as a flush).
1935 * This means that we can't safely call nfsv4 close on a file until
1936 * the inode is cleared. This in turn means that we are not good
1937 * NFSv4 citizens - we do not indicate to the server to update the file's
1938 * share state even when we are done with one of the three share
1939 * stateid's in the inode.
1940 *
1941 * NOTE: Caller must be holding the sp->so_owner semaphore!
1942 */
8535b2be 1943int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 1944{
4a35bd41 1945 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1946 struct nfs4_closedata *calldata;
b39e625b
TM		 1947 struct nfs4_state_owner *sp = state->owner;
1948 struct rpc_task *task;
5138fde0
TM		 1949 struct rpc_message msg = {
1950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1951 .rpc_cred = state->owner->so_cred,
1952 };
c970aa85
TM		 1953 struct rpc_task_setup task_setup_data = {
1954 .rpc_client = server->client,
5138fde0 1955 .rpc_message = &msg,
c970aa85 1956 .callback_ops = &nfs4_close_ops,
101070ca 1957 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1958 .flags = RPC_TASK_ASYNC,
1959 };
9512135d 1960 int status = -ENOMEM;
1da177e4 1961
8535b2be 1962 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 1963 if (calldata == NULL)
9512135d 1964 goto out;
4a35bd41 1965 calldata->inode = state->inode;
1da177e4 1966 calldata->state = state;
4a35bd41 1967 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1968 calldata->arg.stateid = &state->open_stateid;
1da177e4 1969 /* Serialization for the sequence id */
8535b2be 1970 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 1971 if (calldata->arg.seqid == NULL)
1972 goto out_free_calldata;
dc0b027d 1973 calldata->arg.fmode = 0;
a65318bf 1974 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1975 calldata->res.fattr = &calldata->fattr;
c1d51931 1976 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1977 calldata->res.server = server;
5f7dbd5c 1978 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
f6948697
AV		 1979 path_get(path);
1980 calldata->path = *path;
9512135d 1981
5138fde0
TM		 1982 msg.rpc_argp = &calldata->arg,
1983 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1984 task_setup_data.callback_data = calldata;
1985 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1986 if (IS_ERR(task))
1987 return PTR_ERR(task);
a49c3c77
TM		 1988 status = 0;
1989 if (wait)
1990 status = rpc_wait_for_completion_task(task);
b39e625b 1991 rpc_put_task(task);
a49c3c77 1992 return status;
9512135d
TM		 1993out_free_calldata:
1994 kfree(calldata);
1995out:
b39e625b
TM		 1996 nfs4_put_open_state(state);
1997 nfs4_put_state_owner(sp);
9512135d 1998 return status;
1da177e4
LT		 1999}
2000
2b484297 2001static struct inode *
cd9a1c0e 2002nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2003{
1da177e4 2004 struct nfs4_state *state;
1da177e4 2005
565277f6 2006 /* Protect against concurrent sillydeletes */
cd9a1c0e 2007 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2008 if (IS_ERR(state))
2009 return ERR_CAST(state);
cd9a1c0e 2010 ctx->state = state;
f46e0bd3 2011 return igrab(state->inode);
1da177e4
LT		 2012}
2013
1185a552 2014static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2015{
2016 if (ctx->state == NULL)
2017 return;
2018 if (is_sync)
2019 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2020 else
2021 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2022}
1da177e4
LT		 2023
2024static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2025{
43652ad5
BH		 2026 struct nfs4_server_caps_arg args = {
2027 .fhandle = fhandle,
2028 };
1da177e4
LT		 2029 struct nfs4_server_caps_res res = {};
2030 struct rpc_message msg = {
2031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2032 .rpc_argp = &args,
1da177e4
LT		 2033 .rpc_resp = &res,
2034 };
2035 int status;
2036
cccef3b9 2037 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2038 if (status == 0) {
2039 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2040 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2041 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2042 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2043 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2044 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2045 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2046 server->caps |= NFS_CAP_ACLS;
2047 if (res.has_links != 0)
2048 server->caps |= NFS_CAP_HARDLINKS;
2049 if (res.has_symlinks != 0)
2050 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2051 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2052 server->caps |= NFS_CAP_FILEID;
2053 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2054 server->caps |= NFS_CAP_MODE;
2055 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2056 server->caps |= NFS_CAP_NLINK;
2057 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2058 server->caps |= NFS_CAP_OWNER;
2059 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2060 server->caps |= NFS_CAP_OWNER_GROUP;
2061 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2062 server->caps |= NFS_CAP_ATIME;
2063 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2064 server->caps |= NFS_CAP_CTIME;
2065 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2066 server->caps |= NFS_CAP_MTIME;
2067
a65318bf
TM		 2068 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2069 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2070 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2071 server->acl_bitmask = res.acl_bitmask;
2072 }
cccef3b9 2073
1da177e4
LT		 2074 return status;
2075}
2076
55a97593 2077int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2078{
2079 struct nfs4_exception exception = { };
2080 int err;
2081 do {
2082 err = nfs4_handle_exception(server,
2083 _nfs4_server_capabilities(server, fhandle),
2084 &exception);
2085 } while (exception.retry);
2086 return err;
2087}
2088
2089static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2090 struct nfs_fsinfo *info)
2091{
1da177e4
LT		 2092 struct nfs4_lookup_root_arg args = {
2093 .bitmask = nfs4_fattr_bitmap,
2094 };
2095 struct nfs4_lookup_res res = {
2096 .server = server,
0e574af1 2097 .fattr = info->fattr,
1da177e4
LT		 2098 .fh = fhandle,
2099 };
2100 struct rpc_message msg = {
2101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2102 .rpc_argp = &args,
2103 .rpc_resp = &res,
2104 };
008f55d0 2105
0e574af1 2106 nfs_fattr_init(info->fattr);
fccba804 2107 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2108}
2109
2110static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2111 struct nfs_fsinfo *info)
2112{
2113 struct nfs4_exception exception = { };
2114 int err;
2115 do {
2116 err = nfs4_handle_exception(server,
2117 _nfs4_lookup_root(server, fhandle, info),
2118 &exception);
2119 } while (exception.retry);
2120 return err;
2121}
2122
54ceac45
DH		 2123/*
2124 * get the file handle for the "/" directory on the server
2125 */
1da177e4 2126static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2127 struct nfs_fsinfo *info)
1da177e4 2128{
1da177e4
LT		 2129 int status;
2130
1da177e4 2131 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2132 if (status == 0)
2133 status = nfs4_server_capabilities(server, fhandle);
2134 if (status == 0)
2135 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2136 return nfs4_map_errors(status);
1da177e4
LT		 2137}
2138
6b97fd3d
MN		 2139/*
2140 * Get locations and (maybe) other attributes of a referral.
2141 * Note that we'll actually follow the referral later when
2142 * we detect fsid mismatch in inode revalidation
2143 */
56659e99 2144static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2145{
2146 int status = -ENOMEM;
2147 struct page *page = NULL;
2148 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2149
2150 page = alloc_page(GFP_KERNEL);
2151 if (page == NULL)
2152 goto out;
2153 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2154 if (locations == NULL)
2155 goto out;
2156
c228fd3a 2157 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2158 if (status != 0)
2159 goto out;
2160 /* Make sure server returned a different fsid for the referral */
2161 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2162 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2163 status = -EIO;
2164 goto out;
2165 }
2166
2167 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2168 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2169 if (!fattr->mode)
2170 fattr->mode = S_IFDIR;
2171 memset(fhandle, 0, sizeof(struct nfs_fh));
2172out:
2173 if (page)
2174 __free_page(page);
5d7ca35a 2175 kfree(locations);
6b97fd3d
MN		 2176 return status;
2177}
2178
1da177e4
LT		 2179static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2180{
2181 struct nfs4_getattr_arg args = {
2182 .fh = fhandle,
2183 .bitmask = server->attr_bitmask,
2184 };
2185 struct nfs4_getattr_res res = {
2186 .fattr = fattr,
2187 .server = server,
2188 };
2189 struct rpc_message msg = {
2190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2191 .rpc_argp = &args,
2192 .rpc_resp = &res,
2193 };
2194
0e574af1 2195 nfs_fattr_init(fattr);
cccef3b9 2196 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2197}
2198
2199static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2200{
2201 struct nfs4_exception exception = { };
2202 int err;
2203 do {
2204 err = nfs4_handle_exception(server,
2205 _nfs4_proc_getattr(server, fhandle, fattr),
2206 &exception);
2207 } while (exception.retry);
2208 return err;
2209}
2210
2211/*
2212 * The file is not closed if it is opened due to the a request to change
2213 * the size of the file. The open call will not be needed once the
2214 * VFS layer lookup-intents are implemented.
2215 *
2216 * Close is called when the inode is destroyed.
2217 * If we haven't opened the file for O_WRONLY, we
2218 * need to in the size_change case to obtain a stateid.
2219 *
2220 * Got race?
2221 * Because OPEN is always done by name in nfsv4, it is
2222 * possible that we opened a different file by the same
2223 * name. We can recognize this race condition, but we
2224 * can't do anything about it besides returning an error.
2225 *
2226 * This will be fixed with VFS changes (lookup-intent).
2227 */
2228static int
2229nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2230 struct iattr *sattr)
2231{
08e9eac4 2232 struct inode *inode = dentry->d_inode;
659bfcd6 2233 struct rpc_cred *cred = NULL;
d530838b 2234 struct nfs4_state *state = NULL;
1da177e4
LT		 2235 int status;
2236
0e574af1 2237 nfs_fattr_init(fattr);
1da177e4 2238
d530838b 2239 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2240 if (sattr->ia_valid & ATTR_FILE) {
2241 struct nfs_open_context *ctx;
2242
2243 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2244 if (ctx) {
2245 cred = ctx->cred;
2246 state = ctx->state;
2247 }
659bfcd6 2248 }
08e9eac4 2249
659bfcd6 2250 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2251 if (status == 0)
2252 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2253 return status;
2254}
2255
56659e99
TM		 2256static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2257 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2258 struct nfs_fattr *fattr)
2259{
2260 int status;
2261 struct nfs4_lookup_arg args = {
2262 .bitmask = server->attr_bitmask,
2263 .dir_fh = dirfh,
2264 .name = name,
2265 };
2266 struct nfs4_lookup_res res = {
2267 .server = server,
2268 .fattr = fattr,
2269 .fh = fhandle,
2270 };
2271 struct rpc_message msg = {
2272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2273 .rpc_argp = &args,
2274 .rpc_resp = &res,
2275 };
2276
2277 nfs_fattr_init(fattr);
2278
2279 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2280 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2281 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2282 return status;
2283}
2284
2285static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2286 struct qstr *name, struct nfs_fh *fhandle,
2287 struct nfs_fattr *fattr)
2288{
2289 struct nfs4_exception exception = { };
2290 int err;
2291 do {
4e56e082
TM		 2292 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2293 /* FIXME: !!!! */
2294 if (err == -NFS4ERR_MOVED) {
2295 err = -EREMOTE;
2296 break;
2297 }
2298 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2299 } while (exception.retry);
2300 return err;
2301}
2302
56659e99 2303static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2304 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2305{
4e56e082 2306 int status;
1da177e4
LT		 2307
2308 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2309 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2310 if (status == -NFS4ERR_MOVED)
2311 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2312 dprintk("NFS reply lookup: %d\n", status);
2313 return status;
2314}
2315
2316static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2317{
2318 struct nfs4_exception exception = { };
2319 int err;
2320 do {
2321 err = nfs4_handle_exception(NFS_SERVER(dir),
2322 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2323 &exception);
2324 } while (exception.retry);
2325 return err;
2326}
2327
2328static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2329{
76b32999 2330 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2331 struct nfs4_accessargs args = {
2332 .fh = NFS_FH(inode),
76b32999
TM		 2333 .bitmask = server->attr_bitmask,
2334 };
2335 struct nfs4_accessres res = {
2336 .server = server,
1da177e4 2337 };
1da177e4
LT		 2338 struct rpc_message msg = {
2339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2340 .rpc_argp = &args,
2341 .rpc_resp = &res,
2342 .rpc_cred = entry->cred,
2343 };
2344 int mode = entry->mask;
2345 int status;
2346
2347 /*
2348 * Determine which access bits we want to ask for...
2349 */
2350 if (mode & MAY_READ)
2351 args.access |= NFS4_ACCESS_READ;
2352 if (S_ISDIR(inode->i_mode)) {
2353 if (mode & MAY_WRITE)
2354 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2355 if (mode & MAY_EXEC)
2356 args.access |= NFS4_ACCESS_LOOKUP;
2357 } else {
2358 if (mode & MAY_WRITE)
2359 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2360 if (mode & MAY_EXEC)
2361 args.access |= NFS4_ACCESS_EXECUTE;
2362 }
c407d41a
TM		 2363
2364 res.fattr = nfs_alloc_fattr();
2365 if (res.fattr == NULL)
2366 return -ENOMEM;
2367
cccef3b9 2368 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2369 if (!status) {
2370 entry->mask = 0;
2371 if (res.access & NFS4_ACCESS_READ)
2372 entry->mask |= MAY_READ;
2373 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2374 entry->mask |= MAY_WRITE;
2375 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2376 entry->mask |= MAY_EXEC;
c407d41a 2377 nfs_refresh_inode(inode, res.fattr);
1da177e4 2378 }
c407d41a 2379 nfs_free_fattr(res.fattr);
1da177e4
LT		 2380 return status;
2381}
2382
2383static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2384{
2385 struct nfs4_exception exception = { };
2386 int err;
2387 do {
2388 err = nfs4_handle_exception(NFS_SERVER(inode),
2389 _nfs4_proc_access(inode, entry),
2390 &exception);
2391 } while (exception.retry);
2392 return err;
2393}
2394
2395/*
2396 * TODO: For the time being, we don't try to get any attributes
2397 * along with any of the zero-copy operations READ, READDIR,
2398 * READLINK, WRITE.
2399 *
2400 * In the case of the first three, we want to put the GETATTR
2401 * after the read-type operation -- this is because it is hard
2402 * to predict the length of a GETATTR response in v4, and thus
2403 * align the READ data correctly. This means that the GETATTR
2404 * may end up partially falling into the page cache, and we should
2405 * shift it into the 'tail' of the xdr_buf before processing.
2406 * To do this efficiently, we need to know the total length
2407 * of data received, which doesn't seem to be available outside
2408 * of the RPC layer.
2409 *
2410 * In the case of WRITE, we also want to put the GETATTR after
2411 * the operation -- in this case because we want to make sure
2412 * we get the post-operation mtime and size. This means that
2413 * we can't use xdr_encode_pages() as written: we need a variant
2414 * of it which would leave room in the 'tail' iovec.
2415 *
2416 * Both of these changes to the XDR layer would in fact be quite
2417 * minor, but I decided to leave them for a subsequent patch.
2418 */
2419static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2420 unsigned int pgbase, unsigned int pglen)
2421{
2422 struct nfs4_readlink args = {
2423 .fh = NFS_FH(inode),
2424 .pgbase = pgbase,
2425 .pglen = pglen,
2426 .pages = &page,
2427 };
f50c7000 2428 struct nfs4_readlink_res res;
1da177e4
LT		 2429 struct rpc_message msg = {
2430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2431 .rpc_argp = &args,
f50c7000 2432 .rpc_resp = &res,
1da177e4
LT		 2433 };
2434
cccef3b9 2435 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2436}
2437
2438static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2439 unsigned int pgbase, unsigned int pglen)
2440{
2441 struct nfs4_exception exception = { };
2442 int err;
2443 do {
2444 err = nfs4_handle_exception(NFS_SERVER(inode),
2445 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2446 &exception);
2447 } while (exception.retry);
2448 return err;
2449}
2450
1da177e4
LT		 2451/*
2452 * Got race?
2453 * We will need to arrange for the VFS layer to provide an atomic open.
2454 * Until then, this create/open method is prone to inefficiency and race
2455 * conditions due to the lookup, create, and open VFS calls from sys_open()
2456 * placed on the wire.
2457 *
2458 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2459 * The file will be opened again in the subsequent VFS open call
2460 * (nfs4_proc_file_open).
2461 *
2462 * The open for read will just hang around to be used by any process that
2463 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2464 */
2465
2466static int
2467nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2468 int flags, struct nfs_open_context *ctx)
1da177e4 2469{
c0204fd2 2470 struct path my_path = {
ad389da7
TM		 2471 .dentry = dentry,
2472 };
c0204fd2 2473 struct path *path = &my_path;
1da177e4 2474 struct nfs4_state *state;
c0204fd2
TM		 2475 struct rpc_cred *cred = NULL;
2476 fmode_t fmode = 0;
1da177e4
LT		 2477 int status = 0;
2478
c0204fd2
TM		 2479 if (ctx != NULL) {
2480 cred = ctx->cred;
2481 path = &ctx->path;
2482 fmode = ctx->mode;
1da177e4 2483 }
c0204fd2 2484 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d4d9cdcb 2485 d_drop(dentry);
1da177e4
LT		 2486 if (IS_ERR(state)) {
2487 status = PTR_ERR(state);
c0204fd2 2488 goto out;
1da177e4 2489 }
d4d9cdcb 2490 d_add(dentry, igrab(state->inode));
d75340cc 2491 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2492 if (ctx != NULL)
2493 ctx->state = state;
02a913a7 2494 else
c0204fd2 2495 nfs4_close_sync(path, state, fmode);
1da177e4
LT		 2496out:
2497 return status;
2498}
2499
2500static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2501{
16e42959 2502 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2503 struct nfs_removeargs args = {
1da177e4 2504 .fh = NFS_FH(dir),
4fdc17b2
TM		 2505 .name.len = name->len,
2506 .name.name = name->name,
16e42959
TM		 2507 .bitmask = server->attr_bitmask,
2508 };
4fdc17b2 2509 struct nfs_removeres res = {
16e42959 2510 .server = server,
1da177e4 2511 };
1da177e4 2512 struct rpc_message msg = {
4fdc17b2
TM		 2513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2514 .rpc_argp = &args,
2515 .rpc_resp = &res,
1da177e4 2516 };
d346890b
TM		 2517 int status = -ENOMEM;
2518
2519 res.dir_attr = nfs_alloc_fattr();
2520 if (res.dir_attr == NULL)
2521 goto out;
1da177e4 2522
cccef3b9 2523 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2524 if (status == 0) {
2525 update_changeattr(dir, &res.cinfo);
d346890b 2526 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2527 }
d346890b
TM		 2528 nfs_free_fattr(res.dir_attr);
2529out:
1da177e4
LT		 2530 return status;
2531}
2532
2533static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2534{
2535 struct nfs4_exception exception = { };
2536 int err;
2537 do {
2538 err = nfs4_handle_exception(NFS_SERVER(dir),
2539 _nfs4_proc_remove(dir, name),
2540 &exception);
2541 } while (exception.retry);
2542 return err;
2543}
2544
e4eff1a6 2545static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2546{
e4eff1a6
TM		 2547 struct nfs_server *server = NFS_SERVER(dir);
2548 struct nfs_removeargs *args = msg->rpc_argp;
2549 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2550
a65318bf 2551 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2552 res->server = server;
1da177e4 2553 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2554}
2555
e4eff1a6 2556static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2557{
e4eff1a6
TM		 2558 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2559
14516c3a
TM		 2560 if (!nfs4_sequence_done(task, &res->seq_res))
2561 return 0;
9e33bed5 2562 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2563 return 0;
2564 update_changeattr(dir, &res->cinfo);
d346890b 2565 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2566 return 1;
1da177e4
LT		 2567}
2568
2569static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2570 struct inode *new_dir, struct qstr *new_name)
2571{
6caf2c82 2572 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2573 struct nfs4_rename_arg arg = {
2574 .old_dir = NFS_FH(old_dir),
2575 .new_dir = NFS_FH(new_dir),
2576 .old_name = old_name,
2577 .new_name = new_name,
6caf2c82
TM		 2578 .bitmask = server->attr_bitmask,
2579 };
6caf2c82
TM		 2580 struct nfs4_rename_res res = {
2581 .server = server,
1da177e4 2582 };
1da177e4
LT		 2583 struct rpc_message msg = {
2584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2585 .rpc_argp = &arg,
2586 .rpc_resp = &res,
2587 };
011fff72 2588 int status = -ENOMEM;
1da177e4 2589
011fff72
TM		 2590 res.old_fattr = nfs_alloc_fattr();
2591 res.new_fattr = nfs_alloc_fattr();
2592 if (res.old_fattr == NULL || res.new_fattr == NULL)
2593 goto out;
1da177e4 2594
011fff72 2595 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2596 if (!status) {
2597 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2598 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2599 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2600 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2601 }
011fff72
TM		 2602out:
2603 nfs_free_fattr(res.new_fattr);
2604 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2605 return status;
2606}
2607
2608static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2609 struct inode *new_dir, struct qstr *new_name)
2610{
2611 struct nfs4_exception exception = { };
2612 int err;
2613 do {
2614 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2615 _nfs4_proc_rename(old_dir, old_name,
2616 new_dir, new_name),
2617 &exception);
2618 } while (exception.retry);
2619 return err;
2620}
2621
2622static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2623{
91ba2eee 2624 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2625 struct nfs4_link_arg arg = {
2626 .fh = NFS_FH(inode),
2627 .dir_fh = NFS_FH(dir),
2628 .name = name,
91ba2eee
TM		 2629 .bitmask = server->attr_bitmask,
2630 };
91ba2eee
TM		 2631 struct nfs4_link_res res = {
2632 .server = server,
1da177e4 2633 };
1da177e4
LT		 2634 struct rpc_message msg = {
2635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2636 .rpc_argp = &arg,
91ba2eee 2637 .rpc_resp = &res,
1da177e4 2638 };
136f2627
TM		 2639 int status = -ENOMEM;
2640
2641 res.fattr = nfs_alloc_fattr();
2642 res.dir_attr = nfs_alloc_fattr();
2643 if (res.fattr == NULL || res.dir_attr == NULL)
2644 goto out;
1da177e4 2645
cccef3b9 2646 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2647 if (!status) {
2648 update_changeattr(dir, &res.cinfo);
2649 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2650 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2651 }
136f2627
TM		 2652out:
2653 nfs_free_fattr(res.dir_attr);
2654 nfs_free_fattr(res.fattr);
1da177e4
LT		 2655 return status;
2656}
2657
2658static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2659{
2660 struct nfs4_exception exception = { };
2661 int err;
2662 do {
2663 err = nfs4_handle_exception(NFS_SERVER(inode),
2664 _nfs4_proc_link(inode, dir, name),
2665 &exception);
2666 } while (exception.retry);
2667 return err;
2668}
2669
57dc9a57
TM		 2670struct nfs4_createdata {
2671 struct rpc_message msg;
2672 struct nfs4_create_arg arg;
2673 struct nfs4_create_res res;
2674 struct nfs_fh fh;
2675 struct nfs_fattr fattr;
2676 struct nfs_fattr dir_fattr;
2677};
2678
2679static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2680 struct qstr *name, struct iattr *sattr, u32 ftype)
2681{
2682 struct nfs4_createdata *data;
2683
2684 data = kzalloc(sizeof(*data), GFP_KERNEL);
2685 if (data != NULL) {
2686 struct nfs_server *server = NFS_SERVER(dir);
2687
2688 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2689 data->msg.rpc_argp = &data->arg;
2690 data->msg.rpc_resp = &data->res;
2691 data->arg.dir_fh = NFS_FH(dir);
2692 data->arg.server = server;
2693 data->arg.name = name;
2694 data->arg.attrs = sattr;
2695 data->arg.ftype = ftype;
2696 data->arg.bitmask = server->attr_bitmask;
2697 data->res.server = server;
2698 data->res.fh = &data->fh;
2699 data->res.fattr = &data->fattr;
2700 data->res.dir_fattr = &data->dir_fattr;
2701 nfs_fattr_init(data->res.fattr);
2702 nfs_fattr_init(data->res.dir_fattr);
2703 }
2704 return data;
2705}
2706
2707static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2708{
cccef3b9
AA		 2709 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2710 &data->arg, &data->res, 1);
57dc9a57
TM		 2711 if (status == 0) {
2712 update_changeattr(dir, &data->res.dir_cinfo);
2713 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2714 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2715 }
2716 return status;
2717}
2718
2719static void nfs4_free_createdata(struct nfs4_createdata *data)
2720{
2721 kfree(data);
2722}
2723
4f390c15 2724static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2725 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2726{
57dc9a57
TM		 2727 struct nfs4_createdata *data;
2728 int status = -ENAMETOOLONG;
1da177e4 2729
94a6d753 2730 if (len > NFS4_MAXPATHLEN)
57dc9a57 2731 goto out;
4f390c15 2732
57dc9a57
TM		 2733 status = -ENOMEM;
2734 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2735 if (data == NULL)
2736 goto out;
2737
2738 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2739 data->arg.u.symlink.pages = &page;
2740 data->arg.u.symlink.len = len;
1da177e4 2741
57dc9a57
TM		 2742 status = nfs4_do_create(dir, dentry, data);
2743
2744 nfs4_free_createdata(data);
2745out:
1da177e4
LT		 2746 return status;
2747}
2748
4f390c15 2749static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2750 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2751{
2752 struct nfs4_exception exception = { };
2753 int err;
2754 do {
2755 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2756 _nfs4_proc_symlink(dir, dentry, page,
2757 len, sattr),
1da177e4
LT		 2758 &exception);
2759 } while (exception.retry);
2760 return err;
2761}
2762
2763static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2764 struct iattr *sattr)
2765{
57dc9a57
TM		 2766 struct nfs4_createdata *data;
2767 int status = -ENOMEM;
1da177e4 2768
57dc9a57
TM		 2769 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2770 if (data == NULL)
2771 goto out;
2772
2773 status = nfs4_do_create(dir, dentry, data);
2774
2775 nfs4_free_createdata(data);
2776out:
1da177e4
LT		 2777 return status;
2778}
2779
2780static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2781 struct iattr *sattr)
2782{
2783 struct nfs4_exception exception = { };
2784 int err;
2785 do {
2786 err = nfs4_handle_exception(NFS_SERVER(dir),
2787 _nfs4_proc_mkdir(dir, dentry, sattr),
2788 &exception);
2789 } while (exception.retry);
2790 return err;
2791}
2792
2793static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2794 u64 cookie, struct page *page, unsigned int count, int plus)
2795{
2796 struct inode *dir = dentry->d_inode;
2797 struct nfs4_readdir_arg args = {
2798 .fh = NFS_FH(dir),
2799 .pages = &page,
2800 .pgbase = 0,
2801 .count = count,
96d25e53 2802 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2803 };
2804 struct nfs4_readdir_res res;
2805 struct rpc_message msg = {
2806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2807 .rpc_argp = &args,
2808 .rpc_resp = &res,
2809 .rpc_cred = cred,
2810 };
2811 int status;
2812
3110ff80 2813 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2814 dentry->d_parent->d_name.name,
2815 dentry->d_name.name,
2816 (unsigned long long)cookie);
1da177e4
LT		 2817 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2818 res.pgbase = args.pgbase;
cccef3b9 2819 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2820 if (status == 0)
2821 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2822
2823 nfs_invalidate_atime(dir);
2824
3110ff80 2825 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2826 return status;
2827}
2828
2829static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2830 u64 cookie, struct page *page, unsigned int count, int plus)
2831{
2832 struct nfs4_exception exception = { };
2833 int err;
2834 do {
2835 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2836 _nfs4_proc_readdir(dentry, cred, cookie,
2837 page, count, plus),
2838 &exception);
2839 } while (exception.retry);
2840 return err;
2841}
2842
2843static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2844 struct iattr *sattr, dev_t rdev)
2845{
57dc9a57
TM		 2846 struct nfs4_createdata *data;
2847 int mode = sattr->ia_mode;
2848 int status = -ENOMEM;
1da177e4
LT		 2849
2850 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2851 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2852
2853 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2854 if (data == NULL)
2855 goto out;
2856
1da177e4 2857 if (S_ISFIFO(mode))
57dc9a57 2858 data->arg.ftype = NF4FIFO;
1da177e4 2859 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2860 data->arg.ftype = NF4BLK;
2861 data->arg.u.device.specdata1 = MAJOR(rdev);
2862 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2863 }
2864 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2865 data->arg.ftype = NF4CHR;
2866 data->arg.u.device.specdata1 = MAJOR(rdev);
2867 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2868 }
1da177e4 2869
57dc9a57
TM		 2870 status = nfs4_do_create(dir, dentry, data);
2871
2872 nfs4_free_createdata(data);
2873out:
1da177e4
LT		 2874 return status;
2875}
2876
2877static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2878 struct iattr *sattr, dev_t rdev)
2879{
2880 struct nfs4_exception exception = { };
2881 int err;
2882 do {
2883 err = nfs4_handle_exception(NFS_SERVER(dir),
2884 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2885 &exception);
2886 } while (exception.retry);
2887 return err;
2888}
2889
2890static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2891 struct nfs_fsstat *fsstat)
2892{
2893 struct nfs4_statfs_arg args = {
2894 .fh = fhandle,
2895 .bitmask = server->attr_bitmask,
2896 };
24ad148a
BH		 2897 struct nfs4_statfs_res res = {
2898 .fsstat = fsstat,
2899 };
1da177e4
LT		 2900 struct rpc_message msg = {
2901 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2902 .rpc_argp = &args,
24ad148a 2903 .rpc_resp = &res,
1da177e4
LT		 2904 };
2905
0e574af1 2906 nfs_fattr_init(fsstat->fattr);
cccef3b9 2907 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2908}
2909
2910static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2911{
2912 struct nfs4_exception exception = { };
2913 int err;
2914 do {
2915 err = nfs4_handle_exception(server,
2916 _nfs4_proc_statfs(server, fhandle, fsstat),
2917 &exception);
2918 } while (exception.retry);
2919 return err;
2920}
2921
2922static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2923 struct nfs_fsinfo *fsinfo)
2924{
2925 struct nfs4_fsinfo_arg args = {
2926 .fh = fhandle,
2927 .bitmask = server->attr_bitmask,
2928 };
3dda5e43
BH		 2929 struct nfs4_fsinfo_res res = {
2930 .fsinfo = fsinfo,
2931 };
1da177e4
LT		 2932 struct rpc_message msg = {
2933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2934 .rpc_argp = &args,
3dda5e43 2935 .rpc_resp = &res,
1da177e4
LT		 2936 };
2937
cccef3b9 2938 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2939}
2940
2941static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2942{
2943 struct nfs4_exception exception = { };
2944 int err;
2945
2946 do {
2947 err = nfs4_handle_exception(server,
2948 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2949 &exception);
2950 } while (exception.retry);
2951 return err;
2952}
2953
2954static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2955{
0e574af1 2956 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2957 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2958}
2959
2960static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2961 struct nfs_pathconf *pathconf)
2962{
2963 struct nfs4_pathconf_arg args = {
2964 .fh = fhandle,
2965 .bitmask = server->attr_bitmask,
2966 };
d45b2989
BH		 2967 struct nfs4_pathconf_res res = {
2968 .pathconf = pathconf,
2969 };
1da177e4
LT		 2970 struct rpc_message msg = {
2971 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2972 .rpc_argp = &args,
d45b2989 2973 .rpc_resp = &res,
1da177e4
LT		 2974 };
2975
2976 /* None of the pathconf attributes are mandatory to implement */
2977 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2978 memset(pathconf, 0, sizeof(*pathconf));
2979 return 0;
2980 }
2981
0e574af1 2982 nfs_fattr_init(pathconf->fattr);
cccef3b9 2983 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2984}
2985
2986static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2987 struct nfs_pathconf *pathconf)
2988{
2989 struct nfs4_exception exception = { };
2990 int err;
2991
2992 do {
2993 err = nfs4_handle_exception(server,
2994 _nfs4_proc_pathconf(server, fhandle, pathconf),
2995 &exception);
2996 } while (exception.retry);
2997 return err;
2998}
2999
ec06c096 3000static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3001{
ec06c096 3002 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3003
f11c88af
AA		 3004 dprintk("--> %s\n", __func__);
3005
14516c3a
TM		 3006 if (!nfs4_sequence_done(task, &data->res.seq_res))
3007 return -EAGAIN;
f11c88af 3008
9e33bed5 3009 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3010 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3011 return -EAGAIN;
1da177e4 3012 }
8850df99
TM		 3013
3014 nfs_invalidate_atime(data->inode);
1da177e4 3015 if (task->tk_status > 0)
ec06c096
TM		 3016 renew_lease(server, data->timestamp);
3017 return 0;
1da177e4
LT		 3018}
3019
bdc7f021 3020static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3021{
1da177e4 3022 data->timestamp = jiffies;
bdc7f021 3023 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3024}
3025
788e7a89 3026static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3027{
1da177e4
LT		 3028 struct inode *inode = data->inode;
3029
14516c3a
TM		 3030 if (!nfs4_sequence_done(task, &data->res.seq_res))
3031 return -EAGAIN;
def6ed7e 3032
9e33bed5 3033 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3034 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3035 return -EAGAIN;
1da177e4 3036 }
4f9838c7 3037 if (task->tk_status >= 0) {
1da177e4 3038 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3039 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3040 }
788e7a89 3041 return 0;
1da177e4
LT		 3042}
3043
bdc7f021 3044static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3045{
bdc7f021
TM		 3046 struct nfs_server *server = NFS_SERVER(data->inode);
3047
a65318bf 3048 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3049 data->res.server = server;
1da177e4
LT		 3050 data->timestamp = jiffies;
3051
bdc7f021 3052 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3053}
3054
788e7a89 3055static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3056{
1da177e4
LT		 3057 struct inode *inode = data->inode;
3058
14516c3a
TM		 3059 if (!nfs4_sequence_done(task, &data->res.seq_res))
3060 return -EAGAIN;
3061
9e33bed5 3062 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3063 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3064 return -EAGAIN;
1da177e4 3065 }
9e08a3c5 3066 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3067 return 0;
1da177e4
LT		 3068}
3069
bdc7f021 3070static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3071{
788e7a89 3072 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3073
a65318bf 3074 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3075 data->res.server = server;
bdc7f021 3076 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3077}
3078
9bc4e3ca
CL		 3079struct nfs4_renewdata {
3080 struct nfs_client *client;
3081 unsigned long timestamp;
3082};
3083
1da177e4
LT		 3084/*
3085 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3086 * standalone procedure for queueing an asynchronous RENEW.
3087 */
9bc4e3ca 3088static void nfs4_renew_release(void *calldata)
dc96aef9 3089{
9bc4e3ca
CL		 3090 struct nfs4_renewdata *data = calldata;
3091 struct nfs_client *clp = data->client;
dc96aef9 3092
0851de06
AB		 3093 if (atomic_read(&clp->cl_count) > 1)
3094 nfs4_schedule_state_renewal(clp);
3095 nfs_put_client(clp);
9bc4e3ca 3096 kfree(data);
dc96aef9
AB		 3097}
3098
9bc4e3ca 3099static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3100{
9bc4e3ca
CL		 3101 struct nfs4_renewdata *data = calldata;
3102 struct nfs_client *clp = data->client;
3103 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3104
3105 if (task->tk_status < 0) {
95baa25c
TM		 3106 /* Unless we're shutting down, schedule state recovery! */
3107 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3108 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3109 return;
3110 }
452e9352 3111 do_renew_lease(clp, timestamp);
1da177e4
LT		 3112}
3113
963d8fe5
TM		 3114static const struct rpc_call_ops nfs4_renew_ops = {
3115 .rpc_call_done = nfs4_renew_done,
dc96aef9 3116 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3117};
3118
adfa6f98 3119int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3120{
3121 struct rpc_message msg = {
3122 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3123 .rpc_argp = clp,
b4454fe1 3124 .rpc_cred = cred,
1da177e4 3125 };
9bc4e3ca 3126 struct nfs4_renewdata *data;
1da177e4 3127
0851de06
AB		 3128 if (!atomic_inc_not_zero(&clp->cl_count))
3129 return -EIO;
9bc4e3ca
CL		 3130 data = kmalloc(sizeof(*data), GFP_KERNEL);
3131 if (data == NULL)
3132 return -ENOMEM;
3133 data->client = clp;
3134 data->timestamp = jiffies;
1da177e4 3135 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3136 &nfs4_renew_ops, data);
1da177e4
LT		 3137}
3138
adfa6f98 3139int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3140{
3141 struct rpc_message msg = {
3142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3143 .rpc_argp = clp,
b4454fe1 3144 .rpc_cred = cred,
1da177e4
LT		 3145 };
3146 unsigned long now = jiffies;
3147 int status;
3148
3149 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3150 if (status < 0)
3151 return status;
452e9352 3152 do_renew_lease(clp, now);
1da177e4
LT		 3153 return 0;
3154}
3155
aa1870af
BF		 3156static inline int nfs4_server_supports_acls(struct nfs_server *server)
3157{
3158 return (server->caps & NFS_CAP_ACLS)
3159 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3160 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3161}
3162
3163/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3164 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3165 * the stack.
3166 */
3167#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3168
3169static void buf_to_pages(const void *buf, size_t buflen,
3170 struct page **pages, unsigned int *pgbase)
3171{
3172 const void *p = buf;
3173
3174 *pgbase = offset_in_page(buf);
3175 p -= *pgbase;
3176 while (p < buf + buflen) {
3177 *(pages++) = virt_to_page(p);
3178 p += PAGE_CACHE_SIZE;
3179 }
3180}
3181
e50a1c2e
BF		 3182struct nfs4_cached_acl {
3183 int cached;
3184 size_t len;
3e9d4154 3185 char data[0];
e50a1c2e
BF		 3186};
3187
3188static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3189{
3190 struct nfs_inode *nfsi = NFS_I(inode);
3191
3192 spin_lock(&inode->i_lock);
3193 kfree(nfsi->nfs4_acl);
3194 nfsi->nfs4_acl = acl;
3195 spin_unlock(&inode->i_lock);
3196}
3197
3198static void nfs4_zap_acl_attr(struct inode *inode)
3199{
3200 nfs4_set_cached_acl(inode, NULL);
3201}
3202
3203static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3204{
3205 struct nfs_inode *nfsi = NFS_I(inode);
3206 struct nfs4_cached_acl *acl;
3207 int ret = -ENOENT;
3208
3209 spin_lock(&inode->i_lock);
3210 acl = nfsi->nfs4_acl;
3211 if (acl == NULL)
3212 goto out;
3213 if (buf == NULL) /* user is just asking for length */
3214 goto out_len;
3215 if (acl->cached == 0)
3216 goto out;
3217 ret = -ERANGE; /* see getxattr(2) man page */
3218 if (acl->len > buflen)
3219 goto out;
3220 memcpy(buf, acl->data, acl->len);
3221out_len:
3222 ret = acl->len;
3223out:
3224 spin_unlock(&inode->i_lock);
3225 return ret;
3226}
3227
3228static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3229{
3230 struct nfs4_cached_acl *acl;
3231
3232 if (buf && acl_len <= PAGE_SIZE) {
3233 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3234 if (acl == NULL)
3235 goto out;
3236 acl->cached = 1;
3237 memcpy(acl->data, buf, acl_len);
3238 } else {
3239 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3240 if (acl == NULL)
3241 goto out;
3242 acl->cached = 0;
3243 }
3244 acl->len = acl_len;
3245out:
3246 nfs4_set_cached_acl(inode, acl);
3247}
3248
16b4289c 3249static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3250{
aa1870af
BF		 3251 struct page *pages[NFS4ACL_MAXPAGES];
3252 struct nfs_getaclargs args = {
3253 .fh = NFS_FH(inode),
3254 .acl_pages = pages,
3255 .acl_len = buflen,
3256 };
663c79b3
BH		 3257 struct nfs_getaclres res = {
3258 .acl_len = buflen,
3259 };
e50a1c2e 3260 void *resp_buf;
aa1870af
BF		 3261 struct rpc_message msg = {
3262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3263 .rpc_argp = &args,
663c79b3 3264 .rpc_resp = &res,
aa1870af 3265 };
e50a1c2e 3266 struct page *localpage = NULL;
aa1870af
BF		 3267 int ret;
3268
e50a1c2e
BF		 3269 if (buflen < PAGE_SIZE) {
3270 /* As long as we're doing a round trip to the server anyway,
3271 * let's be prepared for a page of acl data. */
3272 localpage = alloc_page(GFP_KERNEL);
3273 resp_buf = page_address(localpage);
3274 if (localpage == NULL)
3275 return -ENOMEM;
3276 args.acl_pages[0] = localpage;
3277 args.acl_pgbase = 0;
663c79b3 3278 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3279 } else {
3280 resp_buf = buf;
3281 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3282 }
cccef3b9 3283 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3284 if (ret)
3285 goto out_free;
663c79b3
BH		 3286 if (res.acl_len > args.acl_len)
3287 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3288 else
663c79b3 3289 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3290 if (buf) {
3291 ret = -ERANGE;
663c79b3 3292 if (res.acl_len > buflen)
e50a1c2e
BF		 3293 goto out_free;
3294 if (localpage)
663c79b3 3295 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3296 }
663c79b3 3297 ret = res.acl_len;
e50a1c2e
BF		 3298out_free:
3299 if (localpage)
3300 __free_page(localpage);
aa1870af
BF		 3301 return ret;
3302}
3303
16b4289c
TM		 3304static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3305{
3306 struct nfs4_exception exception = { };
3307 ssize_t ret;
3308 do {
3309 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3310 if (ret >= 0)
3311 break;
3312 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3313 } while (exception.retry);
3314 return ret;
3315}
3316
e50a1c2e
BF		 3317static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3318{
3319 struct nfs_server *server = NFS_SERVER(inode);
3320 int ret;
3321
3322 if (!nfs4_server_supports_acls(server))
3323 return -EOPNOTSUPP;
3324 ret = nfs_revalidate_inode(server, inode);
3325 if (ret < 0)
3326 return ret;
3327 ret = nfs4_read_cached_acl(inode, buf, buflen);
3328 if (ret != -ENOENT)
3329 return ret;
3330 return nfs4_get_acl_uncached(inode, buf, buflen);
3331}
3332
16b4289c 3333static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3334{
3335 struct nfs_server *server = NFS_SERVER(inode);
3336 struct page *pages[NFS4ACL_MAXPAGES];
3337 struct nfs_setaclargs arg = {
3338 .fh = NFS_FH(inode),
3339 .acl_pages = pages,
3340 .acl_len = buflen,
3341 };
73c403a9 3342 struct nfs_setaclres res;
4b580ee3
BF		 3343 struct rpc_message msg = {
3344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3345 .rpc_argp = &arg,
73c403a9 3346 .rpc_resp = &res,
4b580ee3
BF		 3347 };
3348 int ret;
3349
3350 if (!nfs4_server_supports_acls(server))
3351 return -EOPNOTSUPP;
642ac549 3352 nfs_inode_return_delegation(inode);
4b580ee3 3353 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3354 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3355 nfs_access_zap_cache(inode);
3356 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3357 return ret;
3358}
3359
16b4289c
TM		 3360static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3361{
3362 struct nfs4_exception exception = { };
3363 int err;
3364 do {
3365 err = nfs4_handle_exception(NFS_SERVER(inode),
3366 __nfs4_proc_set_acl(inode, buf, buflen),
3367 &exception);
3368 } while (exception.retry);
3369 return err;
3370}
3371
1da177e4 3372static int
aa5190d0 3373nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3374{
aa5190d0
TM		 3375 struct nfs_client *clp = server->nfs_client;
3376
3377 if (task->tk_status >= 0)
1da177e4
LT		 3378 return 0;
3379 switch(task->tk_status) {
9e33bed5
TM		 3380 case -NFS4ERR_ADMIN_REVOKED:
3381 case -NFS4ERR_BAD_STATEID:
3382 case -NFS4ERR_OPENMODE:
3383 if (state == NULL)
3384 break;
3385 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3386 goto do_state_recovery;
1da177e4 3387 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3388 if (state == NULL)
3389 break;
3390 nfs4_state_mark_reclaim_reboot(clp, state);
3391 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3392 case -NFS4ERR_EXPIRED:
a2c0b9e2 3393 goto do_state_recovery;
4745e315
AA		 3394#if defined(CONFIG_NFS_V4_1)
3395 case -NFS4ERR_BADSESSION:
3396 case -NFS4ERR_BADSLOT:
3397 case -NFS4ERR_BAD_HIGH_SLOT:
3398 case -NFS4ERR_DEADSESSION:
3399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3400 case -NFS4ERR_SEQ_FALSE_RETRY:
3401 case -NFS4ERR_SEQ_MISORDERED:
3402 dprintk("%s ERROR %d, Reset session\n", __func__,
3403 task->tk_status);
0b9e2d41 3404 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3405 task->tk_status = 0;
3406 return -EAGAIN;
3407#endif /* CONFIG_NFS_V4_1 */
1da177e4 3408 case -NFS4ERR_DELAY:
aa5190d0 3409 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3410 case -NFS4ERR_GRACE:
2c643488 3411 case -EKEYEXPIRED:
1da177e4
LT		 3412 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3413 task->tk_status = 0;
3414 return -EAGAIN;
3415 case -NFS4ERR_OLD_STATEID:
3416 task->tk_status = 0;
3417 return -EAGAIN;
3418 }
3419 task->tk_status = nfs4_map_errors(task->tk_status);
3420 return 0;
a2c0b9e2
TM		 3421do_state_recovery:
3422 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3423 nfs4_schedule_state_recovery(clp);
3424 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3425 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3426 task->tk_status = 0;
3427 return -EAGAIN;
1da177e4
LT		 3428}
3429
bb8b27e5
TM		 3430int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3431 unsigned short port, struct rpc_cred *cred,
3432 struct nfs4_setclientid_res *res)
1da177e4
LT		 3433{
3434 nfs4_verifier sc_verifier;
3435 struct nfs4_setclientid setclientid = {
3436 .sc_verifier = &sc_verifier,
3437 .sc_prog = program,
3438 };
3439 struct rpc_message msg = {
3440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3441 .rpc_argp = &setclientid,
bb8b27e5 3442 .rpc_resp = res,
286d7d6a 3443 .rpc_cred = cred,
1da177e4 3444 };
bc4785cd 3445 __be32 *p;
1da177e4
LT		 3446 int loop = 0;
3447 int status;
3448
bc4785cd 3449 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3450 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3451 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3452
3453 for(;;) {
3454 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3455 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3456 clp->cl_ipaddr,
3457 rpc_peeraddr2str(clp->cl_rpcclient,
3458 RPC_DISPLAY_ADDR),
69dd716c
TM		 3459 rpc_peeraddr2str(clp->cl_rpcclient,
3460 RPC_DISPLAY_PROTO),
78ea323b 3461 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3462 clp->cl_id_uniquifier);
3463 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3464 sizeof(setclientid.sc_netid),
3465 rpc_peeraddr2str(clp->cl_rpcclient,
3466 RPC_DISPLAY_NETID));
1da177e4 3467 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3468 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3469 clp->cl_ipaddr, port >> 8, port & 255);
3470
3471 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3472 if (status != -NFS4ERR_CLID_INUSE)
3473 break;
3474 if (signalled())
3475 break;
3476 if (loop++ & 1)
3477 ssleep(clp->cl_lease_time + 1);
3478 else
3479 if (++clp->cl_id_uniquifier == 0)
3480 break;
3481 }
3482 return status;
3483}
3484
bb8b27e5
TM		 3485static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3486 struct nfs4_setclientid_res *arg,
3487 struct rpc_cred *cred)
1da177e4
LT		 3488{
3489 struct nfs_fsinfo fsinfo;
3490 struct rpc_message msg = {
3491 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3492 .rpc_argp = arg,
1da177e4 3493 .rpc_resp = &fsinfo,
286d7d6a 3494 .rpc_cred = cred,
1da177e4
LT		 3495 };
3496 unsigned long now;
3497 int status;
3498
3499 now = jiffies;
3500 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3501 if (status == 0) {
3502 spin_lock(&clp->cl_lock);
3503 clp->cl_lease_time = fsinfo.lease_time * HZ;
3504 clp->cl_last_renewal = now;
3505 spin_unlock(&clp->cl_lock);
3506 }
3507 return status;
3508}
3509
bb8b27e5
TM		 3510int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3511 struct nfs4_setclientid_res *arg,
3512 struct rpc_cred *cred)
51581f3b 3513{
77e03677 3514 long timeout = 0;
51581f3b
TM		 3515 int err;
3516 do {
bb8b27e5 3517 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3518 switch (err) {
3519 case 0:
3520 return err;
3521 case -NFS4ERR_RESOURCE:
3522 /* The IBM lawyers misread another document! */
3523 case -NFS4ERR_DELAY:
2c643488 3524 case -EKEYEXPIRED:
51581f3b
TM		 3525 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3526 }
3527 } while (err == 0);
3528 return err;
3529}
3530
fe650407
TM		 3531struct nfs4_delegreturndata {
3532 struct nfs4_delegreturnargs args;
fa178f29 3533 struct nfs4_delegreturnres res;
fe650407
TM		 3534 struct nfs_fh fh;
3535 nfs4_stateid stateid;
26e976a8 3536 unsigned long timestamp;
fa178f29 3537 struct nfs_fattr fattr;
fe650407
TM		 3538 int rpc_status;
3539};
3540
fe650407
TM		 3541static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3542{
3543 struct nfs4_delegreturndata *data = calldata;
938e1010 3544
14516c3a
TM		 3545 if (!nfs4_sequence_done(task, &data->res.seq_res))
3546 return;
938e1010 3547
79708861
RL		 3548 switch (task->tk_status) {
3549 case -NFS4ERR_STALE_STATEID:
3550 case -NFS4ERR_EXPIRED:
3551 case 0:
fa178f29 3552 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3553 break;
3554 default:
3555 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3556 -EAGAIN) {
3557 nfs_restart_rpc(task, data->res.server->nfs_client);
3558 return;
3559 }
3560 }
3561 data->rpc_status = task->tk_status;
fe650407
TM		 3562}
3563
3564static void nfs4_delegreturn_release(void *calldata)
3565{
fe650407
TM		 3566 kfree(calldata);
3567}
3568
938e1010
AA		 3569#if defined(CONFIG_NFS_V4_1)
3570static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3571{
3572 struct nfs4_delegreturndata *d_data;
3573
3574 d_data = (struct nfs4_delegreturndata *)data;
3575
035168ab 3576 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3577 &d_data->args.seq_args,
3578 &d_data->res.seq_res, 1, task))
3579 return;
3580 rpc_call_start(task);
3581}
3582#endif /* CONFIG_NFS_V4_1 */
3583
c8d149f3 3584static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3585#if defined(CONFIG_NFS_V4_1)
3586 .rpc_call_prepare = nfs4_delegreturn_prepare,
3587#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3588 .rpc_call_done = nfs4_delegreturn_done,
3589 .rpc_release = nfs4_delegreturn_release,
3590};
3591
e6f81075 3592static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3593{
3594 struct nfs4_delegreturndata *data;
fa178f29 3595 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3596 struct rpc_task *task;
5138fde0
TM		 3597 struct rpc_message msg = {
3598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3599 .rpc_cred = cred,
3600 };
c970aa85
TM		 3601 struct rpc_task_setup task_setup_data = {
3602 .rpc_client = server->client,
5138fde0 3603 .rpc_message = &msg,
c970aa85
TM		 3604 .callback_ops = &nfs4_delegreturn_ops,
3605 .flags = RPC_TASK_ASYNC,
3606 };
e6f81075 3607 int status = 0;
fe650407 3608
8535b2be 3609 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3610 if (data == NULL)
3611 return -ENOMEM;
3612 data->args.fhandle = &data->fh;
3613 data->args.stateid = &data->stateid;
fa178f29 3614 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3615 nfs_copy_fh(&data->fh, NFS_FH(inode));
3616 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3617 data->res.fattr = &data->fattr;
3618 data->res.server = server;
5f7dbd5c 3619 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3620 nfs_fattr_init(data->res.fattr);
26e976a8 3621 data->timestamp = jiffies;
fe650407
TM		 3622 data->rpc_status = 0;
3623
c970aa85 3624 task_setup_data.callback_data = data;
5138fde0
TM		 3625 msg.rpc_argp = &data->args,
3626 msg.rpc_resp = &data->res,
c970aa85 3627 task = rpc_run_task(&task_setup_data);
7a1218a2 3628 if (IS_ERR(task))
fe650407 3629 return PTR_ERR(task);
e6f81075
TM		 3630 if (!issync)
3631 goto out;
fe650407 3632 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3633 if (status != 0)
3634 goto out;
3635 status = data->rpc_status;
3636 if (status != 0)
3637 goto out;
3638 nfs_refresh_inode(inode, &data->fattr);
3639out:
e6b3c4db 3640 rpc_put_task(task);
fe650407 3641 return status;
1da177e4
LT		 3642}
3643
e6f81075 3644int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3645{
3646 struct nfs_server *server = NFS_SERVER(inode);
3647 struct nfs4_exception exception = { };
3648 int err;
3649 do {
e6f81075 3650 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3651 switch (err) {
3652 case -NFS4ERR_STALE_STATEID:
3653 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3654 case 0:
3655 return 0;
3656 }
3657 err = nfs4_handle_exception(server, err, &exception);
3658 } while (exception.retry);
3659 return err;
3660}
3661
3662#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3663#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3664
3665/*
3666 * sleep, with exponential backoff, and retry the LOCK operation.
3667 */
3668static unsigned long
3669nfs4_set_lock_task_retry(unsigned long timeout)
3670{
150030b7 3671 schedule_timeout_killable(timeout);
1da177e4
LT		 3672 timeout <<= 1;
3673 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3674 return NFS4_LOCK_MAXTIMEOUT;
3675 return timeout;
3676}
3677
1da177e4
LT		 3678static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3679{
3680 struct inode *inode = state->inode;
3681 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3682 struct nfs_client *clp = server->nfs_client;
911d1aaf 3683 struct nfs_lockt_args arg = {
1da177e4 3684 .fh = NFS_FH(inode),
911d1aaf 3685 .fl = request,
1da177e4 3686 };
911d1aaf
TM		 3687 struct nfs_lockt_res res = {
3688 .denied = request,
1da177e4
LT		 3689 };
3690 struct rpc_message msg = {
3691 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3692 .rpc_argp = &arg,
3693 .rpc_resp = &res,
3694 .rpc_cred = state->owner->so_cred,
3695 };
1da177e4
LT		 3696 struct nfs4_lock_state *lsp;
3697 int status;
3698
911d1aaf 3699 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3700 status = nfs4_set_lock_state(state, request);
3701 if (status != 0)
3702 goto out;
3703 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3704 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3705 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3706 switch (status) {
3707 case 0:
3708 request->fl_type = F_UNLCK;
3709 break;
3710 case -NFS4ERR_DENIED:
3711 status = 0;
1da177e4 3712 }
70cc6487 3713 request->fl_ops->fl_release_private(request);
8d0a8a9d 3714out:
1da177e4
LT		 3715 return status;
3716}
3717
3718static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3719{
3720 struct nfs4_exception exception = { };
3721 int err;
3722
3723 do {
3724 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3725 _nfs4_proc_getlk(state, cmd, request),
3726 &exception);
3727 } while (exception.retry);
3728 return err;
3729}
3730
3731static int do_vfs_lock(struct file *file, struct file_lock *fl)
3732{
3733 int res = 0;
3734 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3735 case FL_POSIX:
3736 res = posix_lock_file_wait(file, fl);
3737 break;
3738 case FL_FLOCK:
3739 res = flock_lock_file_wait(file, fl);
3740 break;
3741 default:
3742 BUG();
3743 }
1da177e4
LT		 3744 return res;
3745}
3746
faf5f49c 3747struct nfs4_unlockdata {
911d1aaf
TM		 3748 struct nfs_locku_args arg;
3749 struct nfs_locku_res res;
faf5f49c
TM		 3750 struct nfs4_lock_state *lsp;
3751 struct nfs_open_context *ctx;
911d1aaf
TM		 3752 struct file_lock fl;
3753 const struct nfs_server *server;
26e976a8 3754 unsigned long timestamp;
faf5f49c
TM		 3755};
3756
911d1aaf
TM		 3757static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3758 struct nfs_open_context *ctx,
3759 struct nfs4_lock_state *lsp,
3760 struct nfs_seqid *seqid)
3761{
3762 struct nfs4_unlockdata *p;
3763 struct inode *inode = lsp->ls_state->inode;
3764
8535b2be 3765 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3766 if (p == NULL)
3767 return NULL;
3768 p->arg.fh = NFS_FH(inode);
3769 p->arg.fl = &p->fl;
3770 p->arg.seqid = seqid;
c1d51931 3771 p->res.seqid = seqid;
5f7dbd5c 3772 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3773 p->arg.stateid = &lsp->ls_stateid;
3774 p->lsp = lsp;
3775 atomic_inc(&lsp->ls_count);
3776 /* Ensure we don't close file until we're done freeing locks! */
3777 p->ctx = get_nfs_open_context(ctx);
3778 memcpy(&p->fl, fl, sizeof(p->fl));
3779 p->server = NFS_SERVER(inode);
3780 return p;
3781}
3782
06f814a3 3783static void nfs4_locku_release_calldata(void *data)
faf5f49c 3784{
963d8fe5 3785 struct nfs4_unlockdata *calldata = data;
911d1aaf 3786 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3787 nfs4_put_lock_state(calldata->lsp);
3788 put_nfs_open_context(calldata->ctx);
3789 kfree(calldata);
faf5f49c
TM		 3790}
3791
963d8fe5 3792static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3793{
963d8fe5 3794 struct nfs4_unlockdata *calldata = data;
faf5f49c 3795
14516c3a
TM		 3796 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3797 return;
faf5f49c
TM		 3798 switch (task->tk_status) {
3799 case 0:
3800 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3801 calldata->res.stateid.data,
faf5f49c 3802 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3803 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3804 break;
9e33bed5
TM		 3805 case -NFS4ERR_BAD_STATEID:
3806 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3807 case -NFS4ERR_STALE_STATEID:
3808 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3809 break;
3810 default:
9e33bed5 3811 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3812 nfs_restart_rpc(task,
d61e612a 3813 calldata->server->nfs_client);
faf5f49c 3814 }
faf5f49c
TM		 3815}
3816
4ce70ada 3817static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3818{
4ce70ada 3819 struct nfs4_unlockdata *calldata = data;
faf5f49c 3820
911d1aaf 3821 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3822 return;
3823 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3824 /* Note: exit _without_ running nfs4_locku_done */
3825 task->tk_action = NULL;
faf5f49c
TM		 3826 return;
3827 }
26e976a8 3828 calldata->timestamp = jiffies;
035168ab 3829 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3830 &calldata->arg.seq_args,
3831 &calldata->res.seq_res, 1, task))
3832 return;
5138fde0 3833 rpc_call_start(task);
faf5f49c
TM		 3834}
3835
963d8fe5 3836static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3837 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3838 .rpc_call_done = nfs4_locku_done,
06f814a3 3839 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3840};
3841
a5d16a4d
TM		 3842static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3843 struct nfs_open_context *ctx,
3844 struct nfs4_lock_state *lsp,
3845 struct nfs_seqid *seqid)
3846{
3847 struct nfs4_unlockdata *data;
5138fde0
TM		 3848 struct rpc_message msg = {
3849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3850 .rpc_cred = ctx->cred,
3851 };
c970aa85
TM		 3852 struct rpc_task_setup task_setup_data = {
3853 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3854 .rpc_message = &msg,
c970aa85 3855 .callback_ops = &nfs4_locku_ops,
101070ca 3856 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3857 .flags = RPC_TASK_ASYNC,
3858 };
a5d16a4d 3859
137d6aca
FF		 3860 /* Ensure this is an unlock - when canceling a lock, the
3861 * canceled lock is passed in, and it won't be an unlock.
3862 */
3863 fl->fl_type = F_UNLCK;
3864
a5d16a4d
TM		 3865 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3866 if (data == NULL) {
3867 nfs_free_seqid(seqid);
3868 return ERR_PTR(-ENOMEM);
3869 }
3870
5138fde0
TM		 3871 msg.rpc_argp = &data->arg,
3872 msg.rpc_resp = &data->res,
c970aa85
TM		 3873 task_setup_data.callback_data = data;
3874 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3875}
3876
faf5f49c
TM		 3877static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3878{
19e03c57 3879 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3880 struct nfs_seqid *seqid;
1da177e4 3881 struct nfs4_lock_state *lsp;
06f814a3
TM		 3882 struct rpc_task *task;
3883 int status = 0;
536ff0f8 3884 unsigned char fl_flags = request->fl_flags;
faf5f49c 3885
8d0a8a9d 3886 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3887 /* Unlock _before_ we do the RPC call */
3888 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3889 down_read(&nfsi->rwsem);
3890 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3891 up_read(&nfsi->rwsem);
9b073574 3892 goto out;
19e03c57
TM		 3893 }
3894 up_read(&nfsi->rwsem);
8d0a8a9d 3895 if (status != 0)
9b073574
TM		 3896 goto out;
3897 /* Is this a delegated lock? */
3898 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3899 goto out;
8d0a8a9d 3900 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 3901 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 3902 status = -ENOMEM;
911d1aaf 3903 if (seqid == NULL)
9b073574 3904 goto out;
cd3758e3 3905 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3906 status = PTR_ERR(task);
3907 if (IS_ERR(task))
9b073574 3908 goto out;
a5d16a4d 3909 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3910 rpc_put_task(task);
9b073574 3911out:
536ff0f8 3912 request->fl_flags = fl_flags;
1da177e4
LT		 3913 return status;
3914}
3915
a5d16a4d
TM		 3916struct nfs4_lockdata {
3917 struct nfs_lock_args arg;
3918 struct nfs_lock_res res;
3919 struct nfs4_lock_state *lsp;
3920 struct nfs_open_context *ctx;
3921 struct file_lock fl;
26e976a8 3922 unsigned long timestamp;
a5d16a4d
TM		 3923 int rpc_status;
3924 int cancelled;
66179efe 3925 struct nfs_server *server;
a5d16a4d
TM		 3926};
3927
3928static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 3929 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
3930 gfp_t gfp_mask)
1da177e4 3931{
a5d16a4d
TM		 3932 struct nfs4_lockdata *p;
3933 struct inode *inode = lsp->ls_state->inode;
1da177e4 3934 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 3935
8535b2be 3936 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 3937 if (p == NULL)
3938 return NULL;
3939
3940 p->arg.fh = NFS_FH(inode);
3941 p->arg.fl = &p->fl;
8535b2be 3942 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 3943 if (p->arg.open_seqid == NULL)
3944 goto out_free;
8535b2be 3945 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 3946 if (p->arg.lock_seqid == NULL)
2f74c0a0 3947 goto out_free_seqid;
a5d16a4d 3948 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3949 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3950 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3951 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3952 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3953 p->lsp = lsp;
66179efe 3954 p->server = server;
a5d16a4d
TM		 3955 atomic_inc(&lsp->ls_count);
3956 p->ctx = get_nfs_open_context(ctx);
3957 memcpy(&p->fl, fl, sizeof(p->fl));
3958 return p;
2f74c0a0
TM		 3959out_free_seqid:
3960 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3961out_free:
3962 kfree(p);
3963 return NULL;
3964}
3965
3966static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3967{
3968 struct nfs4_lockdata *data = calldata;
3969 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3970
3110ff80 3971 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3972 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3973 return;
a5d16a4d
TM		 3974 /* Do we need to do an open_to_lock_owner? */
3975 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3976 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3977 return;
a5d16a4d
TM		 3978 data->arg.open_stateid = &state->stateid;
3979 data->arg.new_lock_owner = 1;
c1d51931 3980 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3981 } else
3982 data->arg.new_lock_owner = 0;
26e976a8 3983 data->timestamp = jiffies;
035168ab
TM		 3984 if (nfs4_setup_sequence(data->server,
3985 &data->arg.seq_args,
66179efe
AA		 3986 &data->res.seq_res, 1, task))
3987 return;
5138fde0 3988 rpc_call_start(task);
3110ff80 3989 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3990}
3991
b257957e
AB		 3992static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
3993{
3994 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3995 nfs4_lock_prepare(task, calldata);
3996}
3997
a5d16a4d
TM		 3998static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3999{
4000 struct nfs4_lockdata *data = calldata;
4001
3110ff80 4002 dprintk("%s: begin!\n", __func__);
a5d16a4d 4003
14516c3a
TM		 4004 if (!nfs4_sequence_done(task, &data->res.seq_res))
4005 return;
66179efe 4006
a5d16a4d 4007 data->rpc_status = task->tk_status;
a5d16a4d 4008 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4009 if (data->rpc_status == 0)
4010 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4011 else
4012 goto out;
4013 }
4014 if (data->rpc_status == 0) {
4015 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4016 sizeof(data->lsp->ls_stateid.data));
4017 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4018 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4019 }
a5d16a4d 4020out:
3110ff80 4021 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4022}
4023
4024static void nfs4_lock_release(void *calldata)
4025{
4026 struct nfs4_lockdata *data = calldata;
4027
3110ff80 4028 dprintk("%s: begin!\n", __func__);
2f74c0a0 4029 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4030 if (data->cancelled != 0) {
4031 struct rpc_task *task;
4032 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4033 data->arg.lock_seqid);
4034 if (!IS_ERR(task))
e6b3c4db 4035 rpc_put_task(task);
3110ff80 4036 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4037 } else
4038 nfs_free_seqid(data->arg.lock_seqid);
4039 nfs4_put_lock_state(data->lsp);
4040 put_nfs_open_context(data->ctx);
4041 kfree(data);
3110ff80 4042 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4043}
4044
4045static const struct rpc_call_ops nfs4_lock_ops = {
4046 .rpc_call_prepare = nfs4_lock_prepare,
4047 .rpc_call_done = nfs4_lock_done,
4048 .rpc_release = nfs4_lock_release,
4049};
4050
b257957e
AB		 4051static const struct rpc_call_ops nfs4_recover_lock_ops = {
4052 .rpc_call_prepare = nfs4_recover_lock_prepare,
4053 .rpc_call_done = nfs4_lock_done,
4054 .rpc_release = nfs4_lock_release,
4055};
4056
2bee72a6
TM		 4057static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4058{
4059 struct nfs_client *clp = server->nfs_client;
4060 struct nfs4_state *state = lsp->ls_state;
4061
4062 switch (error) {
4063 case -NFS4ERR_ADMIN_REVOKED:
4064 case -NFS4ERR_BAD_STATEID:
4065 case -NFS4ERR_EXPIRED:
4066 if (new_lock_owner != 0 ||
4067 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4068 nfs4_state_mark_reclaim_nograce(clp, state);
4069 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4070 break;
4071 case -NFS4ERR_STALE_STATEID:
4072 if (new_lock_owner != 0 ||
4073 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4074 nfs4_state_mark_reclaim_reboot(clp, state);
4075 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4076 };
4077}
4078
afe6c27c 4079static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4080{
4081 struct nfs4_lockdata *data;
4082 struct rpc_task *task;
5138fde0
TM		 4083 struct rpc_message msg = {
4084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4085 .rpc_cred = state->owner->so_cred,
4086 };
c970aa85
TM		 4087 struct rpc_task_setup task_setup_data = {
4088 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4089 .rpc_message = &msg,
c970aa85 4090 .callback_ops = &nfs4_lock_ops,
101070ca 4091 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4092 .flags = RPC_TASK_ASYNC,
4093 };
a5d16a4d
TM		 4094 int ret;
4095
3110ff80 4096 dprintk("%s: begin!\n", __func__);
cd3758e3 4097 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4098 fl->fl_u.nfs4_fl.owner,
4099 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4100 if (data == NULL)
4101 return -ENOMEM;
4102 if (IS_SETLKW(cmd))
4103 data->arg.block = 1;
b257957e
AB		 4104 if (recovery_type > NFS_LOCK_NEW) {
4105 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4106 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4107 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4108 }
5138fde0
TM		 4109 msg.rpc_argp = &data->arg,
4110 msg.rpc_resp = &data->res,
c970aa85
TM		 4111 task_setup_data.callback_data = data;
4112 task = rpc_run_task(&task_setup_data);
7a1218a2 4113 if (IS_ERR(task))
a5d16a4d 4114 return PTR_ERR(task);
a5d16a4d
TM		 4115 ret = nfs4_wait_for_completion_rpc_task(task);
4116 if (ret == 0) {
4117 ret = data->rpc_status;
2bee72a6
TM		 4118 if (ret)
4119 nfs4_handle_setlk_error(data->server, data->lsp,
4120 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4121 } else
4122 data->cancelled = 1;
e6b3c4db 4123 rpc_put_task(task);
3110ff80 4124 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4125 return ret;
1da177e4
LT		 4126}
4127
4128static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4129{
202b50dc
TM		 4130 struct nfs_server *server = NFS_SERVER(state->inode);
4131 struct nfs4_exception exception = { };
4132 int err;
4133
4134 do {
42a2d13e
TM		 4135 /* Cache the lock if possible... */
4136 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4137 return 0;
afe6c27c 4138 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4139 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4140 break;
4141 nfs4_handle_exception(server, err, &exception);
4142 } while (exception.retry);
4143 return err;
1da177e4
LT		 4144}
4145
4146static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4147{
202b50dc
TM		 4148 struct nfs_server *server = NFS_SERVER(state->inode);
4149 struct nfs4_exception exception = { };
4150 int err;
4151
6bfc93ef
TM		 4152 err = nfs4_set_lock_state(state, request);
4153 if (err != 0)
4154 return err;
202b50dc 4155 do {
42a2d13e
TM		 4156 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4157 return 0;
afe6c27c 4158 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4159 switch (err) {
4160 default:
4161 goto out;
4162 case -NFS4ERR_GRACE:
4163 case -NFS4ERR_DELAY:
2c643488 4164 case -EKEYEXPIRED:
a9ed2e25
TM		 4165 nfs4_handle_exception(server, err, &exception);
4166 err = 0;
4167 }
202b50dc 4168 } while (exception.retry);
a9ed2e25 4169out:
202b50dc 4170 return err;
1da177e4
LT		 4171}
4172
4173static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4174{
19e03c57 4175 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4176 unsigned char fl_flags = request->fl_flags;
8e469ebd 4177 int status = -ENOLCK;
1da177e4 4178
8e469ebd
TM		 4179 if ((fl_flags & FL_POSIX) &&
4180 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4181 goto out;
6bfc93ef 4182 /* Is this a delegated open? */
6bfc93ef
TM		 4183 status = nfs4_set_lock_state(state, request);
4184 if (status != 0)
4185 goto out;
01c3b861
TM		 4186 request->fl_flags |= FL_ACCESS;
4187 status = do_vfs_lock(request->fl_file, request);
4188 if (status < 0)
4189 goto out;
19e03c57 4190 down_read(&nfsi->rwsem);
01c3b861 4191 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4192 /* Yes: cache locks! */
01c3b861 4193 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4194 request->fl_flags = fl_flags & ~FL_SLEEP;
4195 status = do_vfs_lock(request->fl_file, request);
4196 goto out_unlock;
01c3b861 4197 }
afe6c27c 4198 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4199 if (status != 0)
01c3b861 4200 goto out_unlock;
6bfc93ef 4201 /* Note: we always want to sleep here! */
01c3b861 4202 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4203 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4204 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4205out_unlock:
19e03c57 4206 up_read(&nfsi->rwsem);
01c3b861
TM		 4207out:
4208 request->fl_flags = fl_flags;
1da177e4
LT		 4209 return status;
4210}
4211
4212static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4213{
4214 struct nfs4_exception exception = { };
4215 int err;
4216
4217 do {
965b5d67
TM		 4218 err = _nfs4_proc_setlk(state, cmd, request);
4219 if (err == -NFS4ERR_DENIED)
4220 err = -EAGAIN;
1da177e4 4221 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4222 err, &exception);
1da177e4
LT		 4223 } while (exception.retry);
4224 return err;
4225}
4226
4227static int
4228nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4229{
4230 struct nfs_open_context *ctx;
4231 struct nfs4_state *state;
4232 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4233 int status;
4234
4235 /* verify open state */
cd3758e3 4236 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4237 state = ctx->state;
4238
4239 if (request->fl_start < 0 || request->fl_end < 0)
4240 return -EINVAL;
4241
d953126a
TM		 4242 if (IS_GETLK(cmd)) {
4243 if (state != NULL)
4244 return nfs4_proc_getlk(state, F_GETLK, request);
4245 return 0;
4246 }
1da177e4
LT		 4247
4248 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4249 return -EINVAL;
4250
d953126a
TM		 4251 if (request->fl_type == F_UNLCK) {
4252 if (state != NULL)
4253 return nfs4_proc_unlck(state, cmd, request);
4254 return 0;
4255 }
1da177e4 4256
d953126a
TM		 4257 if (state == NULL)
4258 return -ENOLCK;
1da177e4
LT		 4259 do {
4260 status = nfs4_proc_setlk(state, cmd, request);
4261 if ((status != -EAGAIN) || IS_SETLK(cmd))
4262 break;
4263 timeout = nfs4_set_lock_task_retry(timeout);
4264 status = -ERESTARTSYS;
4265 if (signalled())
4266 break;
4267 } while(status < 0);
1da177e4
LT		 4268 return status;
4269}
4270
888e694c
TM		 4271int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4272{
4273 struct nfs_server *server = NFS_SERVER(state->inode);
4274 struct nfs4_exception exception = { };
4275 int err;
4276
4277 err = nfs4_set_lock_state(state, fl);
4278 if (err != 0)
4279 goto out;
4280 do {
afe6c27c 4281 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4282 switch (err) {
4283 default:
4284 printk(KERN_ERR "%s: unhandled error %d.\n",
4285 __func__, err);
4286 case 0:
965b5d67 4287 case -ESTALE:
d5122201
TM		 4288 goto out;
4289 case -NFS4ERR_EXPIRED:
4290 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4291 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4292 case -NFS4ERR_BADSESSION:
4293 case -NFS4ERR_BADSLOT:
4294 case -NFS4ERR_BAD_HIGH_SLOT:
4295 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4296 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4297 nfs4_schedule_state_recovery(server->nfs_client);
4298 goto out;
965b5d67
TM		 4299 case -ERESTARTSYS:
4300 /*
4301 * The show must go on: exit, but mark the
4302 * stateid as needing recovery.
4303 */
4304 case -NFS4ERR_ADMIN_REVOKED:
4305 case -NFS4ERR_BAD_STATEID:
4306 case -NFS4ERR_OPENMODE:
4307 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4308 err = 0;
4309 goto out;
4310 case -ENOMEM:
4311 case -NFS4ERR_DENIED:
4312 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4313 err = 0;
4314 goto out;
d5122201 4315 case -NFS4ERR_DELAY:
2c643488 4316 case -EKEYEXPIRED:
d5122201
TM		 4317 break;
4318 }
888e694c
TM		 4319 err = nfs4_handle_exception(server, err, &exception);
4320 } while (exception.retry);
4321out:
4322 return err;
4323}
6b3b5496 4324
d3c7b7cc
TM		 4325static void nfs4_release_lockowner_release(void *calldata)
4326{
4327 kfree(calldata);
4328}
4329
4330const struct rpc_call_ops nfs4_release_lockowner_ops = {
4331 .rpc_release = nfs4_release_lockowner_release,
4332};
4333
4334void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4335{
4336 struct nfs_server *server = lsp->ls_state->owner->so_server;
4337 struct nfs_release_lockowner_args *args;
4338 struct rpc_message msg = {
4339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4340 };
4341
4342 if (server->nfs_client->cl_mvops->minor_version != 0)
4343 return;
4344 args = kmalloc(sizeof(*args), GFP_NOFS);
4345 if (!args)
4346 return;
4347 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4348 args->lock_owner.id = lsp->ls_id.id;
4349 msg.rpc_argp = args;
4350 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4351}
4352
aa1870af
BF		 4353#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4354
6b3b5496
BF		 4355int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4356 size_t buflen, int flags)
4357{
4b580ee3
BF		 4358 struct inode *inode = dentry->d_inode;
4359
4360 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4361 return -EOPNOTSUPP;
4362
4b580ee3 4363 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4364}
4365
4366/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4367 * and that's what we'll do for e.g. user attributes that haven't been set.
4368 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4369 * attributes in kernel-managed attribute namespaces. */
4370ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4371 size_t buflen)
4372{
aa1870af
BF		 4373 struct inode *inode = dentry->d_inode;
4374
4375 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4376 return -EOPNOTSUPP;
4377
4378 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4379}
4380
4381ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4382{
aa1870af 4383 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4384
096455a2
BF		 4385 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4386 return 0;
6b3b5496
BF		 4387 if (buf && buflen < len)
4388 return -ERANGE;
4389 if (buf)
aa1870af
BF		 4390 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4391 return len;
6b3b5496
BF		 4392}
4393
69aaaae1
TM		 4394static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4395{
4396 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4397 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4398 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4399 return;
4400
4401 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4402 NFS_ATTR_FATTR_NLINK;
4403 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4404 fattr->nlink = 2;
4405}
4406
56659e99 4407int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4408 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4409{
4410 struct nfs_server *server = NFS_SERVER(dir);
4411 u32 bitmask[2] = {
361e624f
MN		 4412 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4413 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4414 };
4415 struct nfs4_fs_locations_arg args = {
4416 .dir_fh = NFS_FH(dir),
c228fd3a 4417 .name = name,
683b57b4
TM		 4418 .page = page,
4419 .bitmask = bitmask,
4420 };
22958463
BH		 4421 struct nfs4_fs_locations_res res = {
4422 .fs_locations = fs_locations,
4423 };
683b57b4
TM		 4424 struct rpc_message msg = {
4425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4426 .rpc_argp = &args,
22958463 4427 .rpc_resp = &res,
683b57b4
TM		 4428 };
4429 int status;
4430
3110ff80 4431 dprintk("%s: start\n", __func__);
c228fd3a 4432 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4433 fs_locations->server = server;
830b8e33 4434 fs_locations->nlocations = 0;
cccef3b9 4435 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4436 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4437 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4438 return status;
4439}
4440
557134a3 4441#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4442/*
4443 * nfs4_proc_exchange_id()
4444 *
4445 * Since the clientid has expired, all compounds using sessions
4446 * associated with the stale clientid will be returning
4447 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4448 * be in some phase of session reset.
4449 */
4d643d1d 4450int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4451{
4452 nfs4_verifier verifier;
4453 struct nfs41_exchange_id_args args = {
4454 .client = clp,
4455 .flags = clp->cl_exchange_flags,
4456 };
4457 struct nfs41_exchange_id_res res = {
4458 .client = clp,
4459 };
4460 int status;
4461 struct rpc_message msg = {
4462 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4463 .rpc_argp = &args,
4464 .rpc_resp = &res,
4465 .rpc_cred = cred,
4466 };
4467 __be32 *p;
4468
4469 dprintk("--> %s\n", __func__);
4470 BUG_ON(clp == NULL);
a7b72103 4471
7b183d0d
AB		 4472 /* Remove server-only flags */
4473 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4474
99fe60d0
BH		 4475 p = (u32 *)verifier.data;
4476 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4477 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4478 args.verifier = &verifier;
4479
4480 while (1) {
4481 args.id_len = scnprintf(args.id, sizeof(args.id),
4482 "%s/%s %u",
4483 clp->cl_ipaddr,
4484 rpc_peeraddr2str(clp->cl_rpcclient,
4485 RPC_DISPLAY_ADDR),
4486 clp->cl_id_uniquifier);
4487
4488 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4489
180b62a3 4490 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4491 break;
4492
4493 if (signalled())
4494 break;
4495
4496 if (++clp->cl_id_uniquifier == 0)
4497 break;
4498 }
4499
4500 dprintk("<-- %s status= %d\n", __func__, status);
4501 return status;
4502}
4503
2050f0cc
AA		 4504struct nfs4_get_lease_time_data {
4505 struct nfs4_get_lease_time_args *args;
4506 struct nfs4_get_lease_time_res *res;
4507 struct nfs_client *clp;
4508};
4509
4510static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4511 void *calldata)
4512{
4513 int ret;
4514 struct nfs4_get_lease_time_data *data =
4515 (struct nfs4_get_lease_time_data *)calldata;
4516
4517 dprintk("--> %s\n", __func__);
689cf5c1 4518 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4519 /* just setup sequence, do not trigger session recovery
4520 since we're invoked within one */
4521 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4522 &data->args->la_seq_args,
4523 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4524
4525 BUG_ON(ret == -EAGAIN);
4526 rpc_call_start(task);
4527 dprintk("<-- %s\n", __func__);
4528}
4529
4530/*
4531 * Called from nfs4_state_manager thread for session setup, so don't recover
4532 * from sequence operation or clientid errors.
4533 */
4534static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4535{
4536 struct nfs4_get_lease_time_data *data =
4537 (struct nfs4_get_lease_time_data *)calldata;
4538
4539 dprintk("--> %s\n", __func__);
14516c3a
TM		 4540 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4541 return;
2050f0cc
AA		 4542 switch (task->tk_status) {
4543 case -NFS4ERR_DELAY:
4544 case -NFS4ERR_GRACE:
2c643488 4545 case -EKEYEXPIRED:
2050f0cc
AA		 4546 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4547 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4548 task->tk_status = 0;
0110ee15 4549 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4550 return;
4551 }
2050f0cc
AA		 4552 dprintk("<-- %s\n", __func__);
4553}
4554
4555struct rpc_call_ops nfs4_get_lease_time_ops = {
4556 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4557 .rpc_call_done = nfs4_get_lease_time_done,
4558};
4559
4560int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4561{
4562 struct rpc_task *task;
4563 struct nfs4_get_lease_time_args args;
4564 struct nfs4_get_lease_time_res res = {
4565 .lr_fsinfo = fsinfo,
4566 };
4567 struct nfs4_get_lease_time_data data = {
4568 .args = &args,
4569 .res = &res,
4570 .clp = clp,
4571 };
4572 struct rpc_message msg = {
4573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4574 .rpc_argp = &args,
4575 .rpc_resp = &res,
4576 };
4577 struct rpc_task_setup task_setup = {
4578 .rpc_client = clp->cl_rpcclient,
4579 .rpc_message = &msg,
4580 .callback_ops = &nfs4_get_lease_time_ops,
4581 .callback_data = &data
4582 };
4583 int status;
4584
4585 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4586 dprintk("--> %s\n", __func__);
4587 task = rpc_run_task(&task_setup);
4588
4589 if (IS_ERR(task))
4590 status = PTR_ERR(task);
4591 else {
4592 status = task->tk_status;
4593 rpc_put_task(task);
4594 }
4595 dprintk("<-- %s return %d\n", __func__, status);
4596
4597 return status;
4598}
4599
b73dafa7
RL		 4600/*
4601 * Reset a slot table
4602 */
104aeba4
AA		 4603static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4604 int ivalue)
ac72b7b3 4605{
104aeba4 4606 struct nfs4_slot *new = NULL;
b73dafa7 4607 int i;
ac72b7b3
AA		 4608 int ret = 0;
4609
104aeba4
AA		 4610 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4611 max_reqs, tbl->max_slots);
ac72b7b3 4612
104aeba4
AA		 4613 /* Does the newly negotiated max_reqs match the existing slot table? */
4614 if (max_reqs != tbl->max_slots) {
4615 ret = -ENOMEM;
4616 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4617 GFP_NOFS);
104aeba4
AA		 4618 if (!new)
4619 goto out;
4620 ret = 0;
4621 kfree(tbl->slots);
ac72b7b3
AA		 4622 }
4623 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4624 if (new) {
4625 tbl->slots = new;
4626 tbl->max_slots = max_reqs;
4627 }
4628 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4629 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4630 spin_unlock(&tbl->slot_tbl_lock);
4631 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4632 tbl, tbl->slots, tbl->max_slots);
4633out:
4634 dprintk("<-- %s: return %d\n", __func__, ret);
4635 return ret;
4636}
4637
b73dafa7
RL		 4638/*
4639 * Reset the forechannel and backchannel slot tables
4640 */
4641static int nfs4_reset_slot_tables(struct nfs4_session *session)
4642{
4643 int status;
4644
4645 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4646 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4647 if (status)
4648 return status;
4649
4650 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4651 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4652 return status;
4653}
4654
f8625a6a
RL		 4655/* Destroy the slot table */
4656static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4657{
4658 if (session->fc_slot_table.slots != NULL) {
4659 kfree(session->fc_slot_table.slots);
4660 session->fc_slot_table.slots = NULL;
4661 }
4662 if (session->bc_slot_table.slots != NULL) {
4663 kfree(session->bc_slot_table.slots);
4664 session->bc_slot_table.slots = NULL;
4665 }
4666 return;
4667}
4668
fc931582
AA		 4669/*
4670 * Initialize slot table
4671 */
050047ce
RL		 4672static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4673 int max_slots, int ivalue)
fc931582 4674{
fc931582
AA		 4675 struct nfs4_slot *slot;
4676 int ret = -ENOMEM;
4677
4678 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4679
050047ce 4680 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4681
8535b2be 4682 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4683 if (!slot)
4684 goto out;
fc931582
AA		 4685 ret = 0;
4686
4687 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4688 tbl->max_slots = max_slots;
4689 tbl->slots = slot;
4690 tbl->highest_used_slotid = -1; /* no slot is currently used */
4691 spin_unlock(&tbl->slot_tbl_lock);
4692 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4693 tbl, tbl->slots, tbl->max_slots);
4694out:
4695 dprintk("<-- %s: return %d\n", __func__, ret);
4696 return ret;
fc931582
AA		 4697}
4698
050047ce
RL		 4699/*
4700 * Initialize the forechannel and backchannel tables
4701 */
4702static int nfs4_init_slot_tables(struct nfs4_session *session)
4703{
f26468fb
TM		 4704 struct nfs4_slot_table *tbl;
4705 int status = 0;
050047ce 4706
f26468fb
TM		 4707 tbl = &session->fc_slot_table;
4708 if (tbl->slots == NULL) {
4709 status = nfs4_init_slot_table(tbl,
4710 session->fc_attrs.max_reqs, 1);
4711 if (status)
4712 return status;
4713 }
050047ce 4714
f26468fb
TM		 4715 tbl = &session->bc_slot_table;
4716 if (tbl->slots == NULL) {
4717 status = nfs4_init_slot_table(tbl,
4718 session->bc_attrs.max_reqs, 0);
4719 if (status)
4720 nfs4_destroy_slot_tables(session);
4721 }
f8625a6a
RL		 4722
4723 return status;
557134a3
AA		 4724}
4725
4726struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4727{
4728 struct nfs4_session *session;
4729 struct nfs4_slot_table *tbl;
4730
8535b2be 4731 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4732 if (!session)
4733 return NULL;
76db6d95 4734
ea028ac9 4735 init_completion(&session->complete);
76db6d95 4736
557134a3 4737 tbl = &session->fc_slot_table;
9dfdf404 4738 tbl->highest_used_slotid = -1;
557134a3 4739 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4740 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4741
4742 tbl = &session->bc_slot_table;
9dfdf404 4743 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4744 spin_lock_init(&tbl->slot_tbl_lock);
4745 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4746
1055d76d
TM		 4747 session->session_state = 1<<NFS4_SESSION_INITING;
4748
557134a3
AA		 4749 session->clp = clp;
4750 return session;
4751}
4752
4753void nfs4_destroy_session(struct nfs4_session *session)
4754{
5a0ffe54
AA		 4755 nfs4_proc_destroy_session(session);
4756 dprintk("%s Destroy backchannel for xprt %p\n",
4757 __func__, session->clp->cl_rpcclient->cl_xprt);
4758 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4759 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4760 nfs4_destroy_slot_tables(session);
557134a3
AA		 4761 kfree(session);
4762}
4763
fc931582
AA		 4764/*
4765 * Initialize the values to be used by the client in CREATE_SESSION
4766 * If nfs4_init_session set the fore channel request and response sizes,
4767 * use them.
4768 *
4769 * Set the back channel max_resp_sz_cached to zero to force the client to
4770 * always set csa_cachethis to FALSE because the current implementation
4771 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4772 */
4773static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4774{
4775 struct nfs4_session *session = args->client->cl_session;
4776 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4777 mxresp_sz = session->fc_attrs.max_resp_sz;
4778
4779 if (mxrqst_sz == 0)
4780 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4781 if (mxresp_sz == 0)
4782 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4783 /* Fore channel attributes */
4784 args->fc_attrs.headerpadsz = 0;
4785 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4786 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4787 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4788 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4789
4790 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4791 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4792 __func__,
4793 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4794 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4795
4796 /* Back channel attributes */
4797 args->bc_attrs.headerpadsz = 0;
4798 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4799 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4800 args->bc_attrs.max_resp_sz_cached = 0;
4801 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4802 args->bc_attrs.max_reqs = 1;
4803
4804 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4805 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4806 __func__,
4807 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4808 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4809 args->bc_attrs.max_reqs);
4810}
4811
8d35301d
AA		 4812static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4813{
4814 if (rcvd <= sent)
4815 return 0;
4816 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4817 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4818 return -EINVAL;
4819}
4820
4821#define _verify_fore_channel_attr(_name_) \
4822 _verify_channel_attr("fore", #_name_, \
4823 args->fc_attrs._name_, \
4824 session->fc_attrs._name_)
4825
4826#define _verify_back_channel_attr(_name_) \
4827 _verify_channel_attr("back", #_name_, \
4828 args->bc_attrs._name_, \
4829 session->bc_attrs._name_)
4830
4831/*
4832 * The server is not allowed to increase the fore channel header pad size,
4833 * maximum response size, or maximum number of operations.
4834 *
4835 * The back channel attributes are only negotiatied down: We send what the
4836 * (back channel) server insists upon.
4837 */
4838static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4839 struct nfs4_session *session)
4840{
4841 int ret = 0;
4842
4843 ret |= _verify_fore_channel_attr(headerpadsz);
4844 ret |= _verify_fore_channel_attr(max_resp_sz);
4845 ret |= _verify_fore_channel_attr(max_ops);
4846
4847 ret |= _verify_back_channel_attr(headerpadsz);
4848 ret |= _verify_back_channel_attr(max_rqst_sz);
4849 ret |= _verify_back_channel_attr(max_resp_sz);
4850 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4851 ret |= _verify_back_channel_attr(max_ops);
4852 ret |= _verify_back_channel_attr(max_reqs);
4853
4854 return ret;
4855}
4856
fc931582
AA		 4857static int _nfs4_proc_create_session(struct nfs_client *clp)
4858{
4859 struct nfs4_session *session = clp->cl_session;
4860 struct nfs41_create_session_args args = {
4861 .client = clp,
4862 .cb_program = NFS4_CALLBACK,
4863 };
4864 struct nfs41_create_session_res res = {
4865 .client = clp,
4866 };
4867 struct rpc_message msg = {
4868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4869 .rpc_argp = &args,
4870 .rpc_resp = &res,
4871 };
4872 int status;
4873
4874 nfs4_init_channel_attrs(&args);
0f91421e 4875 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4876
4877 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4878
8d35301d
AA		 4879 if (!status)
4880 /* Verify the session's negotiated channel_attrs values */
4881 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4882 if (!status) {
4883 /* Increment the clientid slot sequence id */
4884 clp->cl_seqid++;
4885 }
4886
4887 return status;
4888}
4889
4890/*
4891 * Issues a CREATE_SESSION operation to the server.
4892 * It is the responsibility of the caller to verify the session is
4893 * expired before calling this routine.
4894 */
f26468fb 4895int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4896{
4897 int status;
4898 unsigned *ptr;
fc931582
AA		 4899 struct nfs4_session *session = clp->cl_session;
4900
4901 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4902
4903 status = _nfs4_proc_create_session(clp);
4904 if (status)
4905 goto out;
4906
f26468fb
TM		 4907 /* Init and reset the fore channel */
4908 status = nfs4_init_slot_tables(session);
4909 dprintk("slot table initialization returned %d\n", status);
4910 if (status)
4911 goto out;
4912 status = nfs4_reset_slot_tables(session);
4913 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4914 if (status)
4915 goto out;
4916
4917 ptr = (unsigned *)&session->sess_id.data[0];
4918 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4919 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4920out:
4921 dprintk("<-- %s\n", __func__);
4922 return status;
4923}
4924
0f3e66c6
AA		 4925/*
4926 * Issue the over-the-wire RPC DESTROY_SESSION.
4927 * The caller must serialize access to this routine.
4928 */
4929int nfs4_proc_destroy_session(struct nfs4_session *session)
4930{
4931 int status = 0;
4932 struct rpc_message msg;
4933
4934 dprintk("--> nfs4_proc_destroy_session\n");
4935
4936 /* session is still being setup */
4937 if (session->clp->cl_cons_state != NFS_CS_READY)
4938 return status;
4939
4940 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4941 msg.rpc_argp = session;
4942 msg.rpc_resp = NULL;
4943 msg.rpc_cred = NULL;
4944 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4945
4946 if (status)
4947 printk(KERN_WARNING
4948 "Got error %d from the server on DESTROY_SESSION. "
4949 "Session has been destroyed regardless...\n", status);
4950
4951 dprintk("<-- nfs4_proc_destroy_session\n");
4952 return status;
4953}
4954
fccba804
TM		 4955int nfs4_init_session(struct nfs_server *server)
4956{
4957 struct nfs_client *clp = server->nfs_client;
2449ea2e 4958 struct nfs4_session *session;
68bf05ef 4959 unsigned int rsize, wsize;
fccba804
TM		 4960 int ret;
4961
4962 if (!nfs4_has_session(clp))
4963 return 0;
4964
1055d76d
TM		 4965 session = clp->cl_session;
4966 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
4967 return 0;
4968
68bf05ef
AA		 4969 rsize = server->rsize;
4970 if (rsize == 0)
4971 rsize = NFS_MAX_FILE_IO_SIZE;
4972 wsize = server->wsize;
4973 if (wsize == 0)
4974 wsize = NFS_MAX_FILE_IO_SIZE;
4975
68bf05ef
AA		 4976 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
4977 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 4978
fccba804
TM		 4979 ret = nfs4_recover_expired_lease(server);
4980 if (!ret)
4981 ret = nfs4_check_client_ready(clp);
4982 return ret;
4983}
4984
fc01cea9
AA		 4985/*
4986 * Renew the cl_session lease.
4987 */
d5f8d3fe
TM		 4988struct nfs4_sequence_data {
4989 struct nfs_client *clp;
4990 struct nfs4_sequence_args args;
4991 struct nfs4_sequence_res res;
4992};
4993
dc96aef9
AB		 4994static void nfs41_sequence_release(void *data)
4995{
d5f8d3fe
TM		 4996 struct nfs4_sequence_data *calldata = data;
4997 struct nfs_client *clp = calldata->clp;
dc96aef9 4998
7135840f
AB		 4999 if (atomic_read(&clp->cl_count) > 1)
5000 nfs4_schedule_state_renewal(clp);
5001 nfs_put_client(clp);
d5f8d3fe 5002 kfree(calldata);
dc96aef9
AB		 5003}
5004
aa5190d0
TM		 5005static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5006{
5007 switch(task->tk_status) {
5008 case -NFS4ERR_DELAY:
5009 case -EKEYEXPIRED:
5010 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5011 return -EAGAIN;
5012 default:
5013 nfs4_schedule_state_recovery(clp);
5014 }
5015 return 0;
5016}
5017
dc96aef9 5018static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5019{
d5f8d3fe
TM		 5020 struct nfs4_sequence_data *calldata = data;
5021 struct nfs_client *clp = calldata->clp;
fc01cea9 5022
14516c3a
TM		 5023 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5024 return;
fc01cea9
AA		 5025
5026 if (task->tk_status < 0) {
5027 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5028 if (atomic_read(&clp->cl_count) == 1)
5029 goto out;
fc01cea9 5030
aa5190d0
TM		 5031 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5032 rpc_restart_call_prepare(task);
fc01cea9
AA		 5033 return;
5034 }
5035 }
fc01cea9 5036 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5037out:
fc01cea9
AA		 5038 dprintk("<-- %s\n", __func__);
5039}
5040
5041static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5042{
d5f8d3fe
TM		 5043 struct nfs4_sequence_data *calldata = data;
5044 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5045 struct nfs4_sequence_args *args;
5046 struct nfs4_sequence_res *res;
5047
fc01cea9
AA		 5048 args = task->tk_msg.rpc_argp;
5049 res = task->tk_msg.rpc_resp;
5050
035168ab 5051 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5052 return;
5053 rpc_call_start(task);
5054}
5055
5056static const struct rpc_call_ops nfs41_sequence_ops = {
5057 .rpc_call_done = nfs41_sequence_call_done,
5058 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5059 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5060};
5061
71ac6da9 5062static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5063{
d5f8d3fe 5064 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5065 struct rpc_message msg = {
5066 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5067 .rpc_cred = cred,
5068 };
71ac6da9
TM		 5069 struct rpc_task_setup task_setup_data = {
5070 .rpc_client = clp->cl_rpcclient,
5071 .rpc_message = &msg,
5072 .callback_ops = &nfs41_sequence_ops,
5073 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5074 };
fc01cea9 5075
7135840f 5076 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5077 return ERR_PTR(-EIO);
d5f8d3fe
TM		 5078 calldata = kmalloc(sizeof(*calldata), GFP_NOFS);
5079 if (calldata == NULL) {
7135840f 5080 nfs_put_client(clp);
71ac6da9 5081 return ERR_PTR(-ENOMEM);
fc01cea9 5082 }
d5f8d3fe
TM		 5083 calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5084 msg.rpc_argp = &calldata->args;
5085 msg.rpc_resp = &calldata->res;
5086 calldata->clp = clp;
71ac6da9 5087 task_setup_data.callback_data = calldata;
fc01cea9 5088
71ac6da9
TM		 5089 return rpc_run_task(&task_setup_data);
5090}
5091
5092static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5093{
5094 struct rpc_task *task;
5095 int ret = 0;
5096
5097 task = _nfs41_proc_sequence(clp, cred);
5098 if (IS_ERR(task))
5099 ret = PTR_ERR(task);
5100 else
5101 rpc_put_task(task);
5102 dprintk("<-- %s status=%d\n", __func__, ret);
5103 return ret;
5104}
5105
5106static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5107{
5108 struct rpc_task *task;
5109 int ret;
5110
5111 task = _nfs41_proc_sequence(clp, cred);
5112 if (IS_ERR(task)) {
5113 ret = PTR_ERR(task);
5114 goto out;
5115 }
5116 ret = rpc_wait_for_completion_task(task);
5117 if (!ret)
5118 ret = task->tk_status;
5119 rpc_put_task(task);
5120out:
5121 dprintk("<-- %s status=%d\n", __func__, ret);
5122 return ret;
fc01cea9
AA		 5123}
5124
fce5c838
RL		 5125struct nfs4_reclaim_complete_data {
5126 struct nfs_client *clp;
5127 struct nfs41_reclaim_complete_args arg;
5128 struct nfs41_reclaim_complete_res res;
5129};
5130
5131static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5132{
5133 struct nfs4_reclaim_complete_data *calldata = data;
5134
b257957e 5135 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5136 if (nfs41_setup_sequence(calldata->clp->cl_session,
5137 &calldata->arg.seq_args,
fce5c838
RL		 5138 &calldata->res.seq_res, 0, task))
5139 return;
5140
5141 rpc_call_start(task);
5142}
5143
aa5190d0
TM		 5144static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5145{
5146 switch(task->tk_status) {
5147 case 0:
5148 case -NFS4ERR_COMPLETE_ALREADY:
5149 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5150 break;
5151 case -NFS4ERR_DELAY:
5152 case -EKEYEXPIRED:
5153 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5154 return -EAGAIN;
5155 default:
5156 nfs4_schedule_state_recovery(clp);
5157 }
5158 return 0;
5159}
5160
fce5c838
RL		 5161static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5162{
5163 struct nfs4_reclaim_complete_data *calldata = data;
5164 struct nfs_client *clp = calldata->clp;
5165 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5166
5167 dprintk("--> %s\n", __func__);
14516c3a
TM		 5168 if (!nfs41_sequence_done(task, res))
5169 return;
fce5c838 5170
aa5190d0
TM		 5171 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5172 rpc_restart_call_prepare(task);
5173 return;
5174 }
fce5c838
RL		 5175 dprintk("<-- %s\n", __func__);
5176}
5177
5178static void nfs4_free_reclaim_complete_data(void *data)
5179{
5180 struct nfs4_reclaim_complete_data *calldata = data;
5181
5182 kfree(calldata);
5183}
5184
5185static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5186 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5187 .rpc_call_done = nfs4_reclaim_complete_done,
5188 .rpc_release = nfs4_free_reclaim_complete_data,
5189};
5190
5191/*
5192 * Issue a global reclaim complete.
5193 */
5194static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5195{
5196 struct nfs4_reclaim_complete_data *calldata;
5197 struct rpc_task *task;
5198 struct rpc_message msg = {
5199 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5200 };
5201 struct rpc_task_setup task_setup_data = {
5202 .rpc_client = clp->cl_rpcclient,
5203 .rpc_message = &msg,
5204 .callback_ops = &nfs4_reclaim_complete_call_ops,
5205 .flags = RPC_TASK_ASYNC,
5206 };
5207 int status = -ENOMEM;
5208
5209 dprintk("--> %s\n", __func__);
8535b2be 5210 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5211 if (calldata == NULL)
5212 goto out;
5213 calldata->clp = clp;
5214 calldata->arg.one_fs = 0;
5215 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5216
5217 msg.rpc_argp = &calldata->arg;
5218 msg.rpc_resp = &calldata->res;
5219 task_setup_data.callback_data = calldata;
5220 task = rpc_run_task(&task_setup_data);
acf82b85 5221 if (IS_ERR(task)) {
fce5c838 5222 status = PTR_ERR(task);
acf82b85
DC		 5223 goto out;
5224 }
fce5c838 5225 rpc_put_task(task);
acf82b85 5226 return 0;
fce5c838
RL		 5227out:
5228 dprintk("<-- %s status=%d\n", __func__, status);
5229 return status;
5230}
557134a3
AA		 5231#endif /* CONFIG_NFS_V4_1 */
5232
591d71cb 5233struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5234 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5235 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5236 .recover_open = nfs4_open_reclaim,
5237 .recover_lock = nfs4_lock_reclaim,
591d71cb 5238 .establish_clid = nfs4_init_clientid,
90a16617 5239 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5240};
5241
591d71cb
AA		 5242#if defined(CONFIG_NFS_V4_1)
5243struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5244 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5245 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5246 .recover_open = nfs4_open_reclaim,
5247 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5248 .establish_clid = nfs41_init_clientid,
b4b82607 5249 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5250 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5251};
5252#endif /* CONFIG_NFS_V4_1 */
5253
5254struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5255 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5256 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5257 .recover_open = nfs4_open_expired,
5258 .recover_lock = nfs4_lock_expired,
5259 .establish_clid = nfs4_init_clientid,
90a16617 5260 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5261};
5262
5263#if defined(CONFIG_NFS_V4_1)
5264struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5265 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5266 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5267 .recover_open = nfs4_open_expired,
5268 .recover_lock = nfs4_lock_expired,
4d643d1d 5269 .establish_clid = nfs41_init_clientid,
b4b82607 5270 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5271};
591d71cb 5272#endif /* CONFIG_NFS_V4_1 */
1da177e4 5273
29fba38b
BH		 5274struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5275 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5276 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5277 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5278};
5279
5280#if defined(CONFIG_NFS_V4_1)
5281struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5282 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5283 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5284 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5285};
5286#endif
5287
97dc1359
TM		 5288static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5289 .minor_version = 0,
5290 .call_sync = _nfs4_call_sync,
e047a10c 5291 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5292 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5293 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5294 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5295};
5296
5297#if defined(CONFIG_NFS_V4_1)
5298static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5299 .minor_version = 1,
5300 .call_sync = _nfs4_call_sync_session,
e047a10c 5301 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5302 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5303 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5304 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5305};
5306#endif
5307
97dc1359
TM		 5308const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5309 [0] = &nfs_v4_0_minor_ops,
5310#if defined(CONFIG_NFS_V4_1)
5311 [1] = &nfs_v4_1_minor_ops,
5312#endif
5313};
5314
92e1d5be 5315static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5316 .permission = nfs_permission,
5317 .getattr = nfs_getattr,
5318 .setattr = nfs_setattr,
5319 .getxattr = nfs4_getxattr,
5320 .setxattr = nfs4_setxattr,
5321 .listxattr = nfs4_listxattr,
5322};
5323
509de811 5324const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5325 .version = 4, /* protocol version */
5326 .dentry_ops = &nfs4_dentry_operations,
5327 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5328 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5329 .getroot = nfs4_proc_get_root,
5330 .getattr = nfs4_proc_getattr,
5331 .setattr = nfs4_proc_setattr,
2b3de441 5332 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5333 .lookup = nfs4_proc_lookup,
5334 .access = nfs4_proc_access,
5335 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5336 .create = nfs4_proc_create,
5337 .remove = nfs4_proc_remove,
5338 .unlink_setup = nfs4_proc_unlink_setup,
5339 .unlink_done = nfs4_proc_unlink_done,
5340 .rename = nfs4_proc_rename,
5341 .link = nfs4_proc_link,
5342 .symlink = nfs4_proc_symlink,
5343 .mkdir = nfs4_proc_mkdir,
5344 .rmdir = nfs4_proc_remove,
5345 .readdir = nfs4_proc_readdir,
5346 .mknod = nfs4_proc_mknod,
5347 .statfs = nfs4_proc_statfs,
5348 .fsinfo = nfs4_proc_fsinfo,
5349 .pathconf = nfs4_proc_pathconf,
e9326dca 5350 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5351 .decode_dirent = nfs4_decode_dirent,
5352 .read_setup = nfs4_proc_read_setup,
ec06c096 5353 .read_done = nfs4_read_done,
1da177e4 5354 .write_setup = nfs4_proc_write_setup,
788e7a89 5355 .write_done = nfs4_write_done,
1da177e4 5356 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5357 .commit_done = nfs4_commit_done,
1da177e4 5358 .lock = nfs4_proc_lock,
e50a1c2e 5359 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5360 .close_context = nfs4_close_context,
2b484297 5361 .open_context = nfs4_atomic_open,
1da177e4
LT		 5362};
5363
5364/*
5365 * Local variables:
5366 * c-basic-offset: 8
5367 * End:
5368 */
kernel source for telekom puls (alcatel/mediatek)