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NFSv4: Clean up nfs4_open_revalidate
[mirror_ubuntu-bionic-kernel.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
dc0b027d 2001static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 2002{
2003 struct file *filp;
1b45c46c 2004 int ret;
02a913a7 2005
1b45c46c 2006 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 2007 if (fmode & FMODE_EXEC) {
af22f94a 2008 ret = nfs_may_open(state->inode,
1b45c46c
TM		 2009 state->owner->so_cred,
2010 nd->intent.open.flags);
2011 if (ret < 0)
2012 goto out_close;
2013 }
4a35bd41 2014 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 2015 if (!IS_ERR(filp)) {
2016 struct nfs_open_context *ctx;
cd3758e3 2017 ctx = nfs_file_open_context(filp);
02a913a7 2018 ctx->state = state;
95cf959b
TM		 2019 return 0;
2020 }
1b45c46c
TM		 2021 ret = PTR_ERR(filp);
2022out_close:
dc0b027d 2023 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 2024 return ret;
02a913a7
TM		 2025}
2026
f46e0bd3 2027struct inode *
cd9a1c0e 2028nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2029{
1da177e4 2030 struct nfs4_state *state;
1da177e4 2031
565277f6 2032 /* Protect against concurrent sillydeletes */
cd9a1c0e 2033 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2034 if (IS_ERR(state))
2035 return ERR_CAST(state);
cd9a1c0e 2036 ctx->state = state;
f46e0bd3 2037 return igrab(state->inode);
1da177e4
LT		 2038}
2039
2040int
b8d4cadd 2041nfs4_open_revalidate(struct inode *dir, struct nfs_open_context *ctx, int openflags)
1da177e4 2042{
1da177e4 2043 struct nfs4_state *state;
1da177e4 2044
b8d4cadd 2045 state = nfs4_do_open(dir, &ctx->path, ctx->mode, openflags, NULL, ctx->cred);
02a913a7
TM		 2046 if (IS_ERR(state)) {
2047 switch (PTR_ERR(state)) {
2048 case -EPERM:
2049 case -EACCES:
2050 case -EDQUOT:
2051 case -ENOSPC:
2052 case -EROFS:
04287f97 2053 return PTR_ERR(state);
b87c0adf
CL		 2054 default:
2055 goto out_drop;
02a913a7 2056 }
02a913a7 2057 }
b8d4cadd
TM		 2058 ctx->state = state;
2059 if (state->inode == ctx->path.dentry->d_inode) {
2060 nfs_set_verifier(ctx->path.dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2061 return 1;
2062 }
02a913a7 2063out_drop:
b8d4cadd 2064 d_drop(ctx->path.dentry);
1da177e4
LT		 2065 return 0;
2066}
2067
1185a552 2068static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2069{
2070 if (ctx->state == NULL)
2071 return;
2072 if (is_sync)
2073 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2074 else
2075 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2076}
1da177e4
LT		 2077
2078static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2079{
43652ad5
BH		 2080 struct nfs4_server_caps_arg args = {
2081 .fhandle = fhandle,
2082 };
1da177e4
LT		 2083 struct nfs4_server_caps_res res = {};
2084 struct rpc_message msg = {
2085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2086 .rpc_argp = &args,
1da177e4
LT		 2087 .rpc_resp = &res,
2088 };
2089 int status;
2090
cccef3b9 2091 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2092 if (status == 0) {
2093 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2094 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2095 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2096 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2097 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2098 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2099 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2100 server->caps |= NFS_CAP_ACLS;
2101 if (res.has_links != 0)
2102 server->caps |= NFS_CAP_HARDLINKS;
2103 if (res.has_symlinks != 0)
2104 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2105 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2106 server->caps |= NFS_CAP_FILEID;
2107 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2108 server->caps |= NFS_CAP_MODE;
2109 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2110 server->caps |= NFS_CAP_NLINK;
2111 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2112 server->caps |= NFS_CAP_OWNER;
2113 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2114 server->caps |= NFS_CAP_OWNER_GROUP;
2115 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2116 server->caps |= NFS_CAP_ATIME;
2117 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2118 server->caps |= NFS_CAP_CTIME;
2119 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2120 server->caps |= NFS_CAP_MTIME;
2121
a65318bf
TM		 2122 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2123 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2124 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2125 server->acl_bitmask = res.acl_bitmask;
2126 }
cccef3b9 2127
1da177e4
LT		 2128 return status;
2129}
2130
55a97593 2131int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2132{
2133 struct nfs4_exception exception = { };
2134 int err;
2135 do {
2136 err = nfs4_handle_exception(server,
2137 _nfs4_server_capabilities(server, fhandle),
2138 &exception);
2139 } while (exception.retry);
2140 return err;
2141}
2142
2143static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2144 struct nfs_fsinfo *info)
2145{
1da177e4
LT		 2146 struct nfs4_lookup_root_arg args = {
2147 .bitmask = nfs4_fattr_bitmap,
2148 };
2149 struct nfs4_lookup_res res = {
2150 .server = server,
0e574af1 2151 .fattr = info->fattr,
1da177e4
LT		 2152 .fh = fhandle,
2153 };
2154 struct rpc_message msg = {
2155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2156 .rpc_argp = &args,
2157 .rpc_resp = &res,
2158 };
008f55d0 2159
0e574af1 2160 nfs_fattr_init(info->fattr);
fccba804 2161 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2162}
2163
2164static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2165 struct nfs_fsinfo *info)
2166{
2167 struct nfs4_exception exception = { };
2168 int err;
2169 do {
2170 err = nfs4_handle_exception(server,
2171 _nfs4_lookup_root(server, fhandle, info),
2172 &exception);
2173 } while (exception.retry);
2174 return err;
2175}
2176
54ceac45
DH		 2177/*
2178 * get the file handle for the "/" directory on the server
2179 */
1da177e4 2180static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2181 struct nfs_fsinfo *info)
1da177e4 2182{
1da177e4
LT		 2183 int status;
2184
1da177e4 2185 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2186 if (status == 0)
2187 status = nfs4_server_capabilities(server, fhandle);
2188 if (status == 0)
2189 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2190 return nfs4_map_errors(status);
1da177e4
LT		 2191}
2192
6b97fd3d
MN		 2193/*
2194 * Get locations and (maybe) other attributes of a referral.
2195 * Note that we'll actually follow the referral later when
2196 * we detect fsid mismatch in inode revalidation
2197 */
56659e99 2198static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2199{
2200 int status = -ENOMEM;
2201 struct page *page = NULL;
2202 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2203
2204 page = alloc_page(GFP_KERNEL);
2205 if (page == NULL)
2206 goto out;
2207 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2208 if (locations == NULL)
2209 goto out;
2210
c228fd3a 2211 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2212 if (status != 0)
2213 goto out;
2214 /* Make sure server returned a different fsid for the referral */
2215 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2216 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2217 status = -EIO;
2218 goto out;
2219 }
2220
2221 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2222 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2223 if (!fattr->mode)
2224 fattr->mode = S_IFDIR;
2225 memset(fhandle, 0, sizeof(struct nfs_fh));
2226out:
2227 if (page)
2228 __free_page(page);
5d7ca35a 2229 kfree(locations);
6b97fd3d
MN		 2230 return status;
2231}
2232
1da177e4
LT		 2233static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2234{
2235 struct nfs4_getattr_arg args = {
2236 .fh = fhandle,
2237 .bitmask = server->attr_bitmask,
2238 };
2239 struct nfs4_getattr_res res = {
2240 .fattr = fattr,
2241 .server = server,
2242 };
2243 struct rpc_message msg = {
2244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2245 .rpc_argp = &args,
2246 .rpc_resp = &res,
2247 };
2248
0e574af1 2249 nfs_fattr_init(fattr);
cccef3b9 2250 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2251}
2252
2253static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2254{
2255 struct nfs4_exception exception = { };
2256 int err;
2257 do {
2258 err = nfs4_handle_exception(server,
2259 _nfs4_proc_getattr(server, fhandle, fattr),
2260 &exception);
2261 } while (exception.retry);
2262 return err;
2263}
2264
2265/*
2266 * The file is not closed if it is opened due to the a request to change
2267 * the size of the file. The open call will not be needed once the
2268 * VFS layer lookup-intents are implemented.
2269 *
2270 * Close is called when the inode is destroyed.
2271 * If we haven't opened the file for O_WRONLY, we
2272 * need to in the size_change case to obtain a stateid.
2273 *
2274 * Got race?
2275 * Because OPEN is always done by name in nfsv4, it is
2276 * possible that we opened a different file by the same
2277 * name. We can recognize this race condition, but we
2278 * can't do anything about it besides returning an error.
2279 *
2280 * This will be fixed with VFS changes (lookup-intent).
2281 */
2282static int
2283nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2284 struct iattr *sattr)
2285{
08e9eac4 2286 struct inode *inode = dentry->d_inode;
659bfcd6 2287 struct rpc_cred *cred = NULL;
d530838b 2288 struct nfs4_state *state = NULL;
1da177e4
LT		 2289 int status;
2290
0e574af1 2291 nfs_fattr_init(fattr);
1da177e4 2292
d530838b 2293 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2294 if (sattr->ia_valid & ATTR_FILE) {
2295 struct nfs_open_context *ctx;
2296
2297 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2298 if (ctx) {
2299 cred = ctx->cred;
2300 state = ctx->state;
2301 }
659bfcd6 2302 }
08e9eac4 2303
659bfcd6 2304 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2305 if (status == 0)
2306 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2307 return status;
2308}
2309
56659e99
TM		 2310static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2311 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2312 struct nfs_fattr *fattr)
2313{
2314 int status;
2315 struct nfs4_lookup_arg args = {
2316 .bitmask = server->attr_bitmask,
2317 .dir_fh = dirfh,
2318 .name = name,
2319 };
2320 struct nfs4_lookup_res res = {
2321 .server = server,
2322 .fattr = fattr,
2323 .fh = fhandle,
2324 };
2325 struct rpc_message msg = {
2326 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2327 .rpc_argp = &args,
2328 .rpc_resp = &res,
2329 };
2330
2331 nfs_fattr_init(fattr);
2332
2333 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2334 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2335 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2336 return status;
2337}
2338
2339static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2340 struct qstr *name, struct nfs_fh *fhandle,
2341 struct nfs_fattr *fattr)
2342{
2343 struct nfs4_exception exception = { };
2344 int err;
2345 do {
4e56e082
TM		 2346 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2347 /* FIXME: !!!! */
2348 if (err == -NFS4ERR_MOVED) {
2349 err = -EREMOTE;
2350 break;
2351 }
2352 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2353 } while (exception.retry);
2354 return err;
2355}
2356
56659e99 2357static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2358 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2359{
4e56e082 2360 int status;
1da177e4
LT		 2361
2362 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2363 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2364 if (status == -NFS4ERR_MOVED)
2365 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2366 dprintk("NFS reply lookup: %d\n", status);
2367 return status;
2368}
2369
2370static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2371{
2372 struct nfs4_exception exception = { };
2373 int err;
2374 do {
2375 err = nfs4_handle_exception(NFS_SERVER(dir),
2376 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2377 &exception);
2378 } while (exception.retry);
2379 return err;
2380}
2381
2382static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2383{
76b32999 2384 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2385 struct nfs4_accessargs args = {
2386 .fh = NFS_FH(inode),
76b32999
TM		 2387 .bitmask = server->attr_bitmask,
2388 };
2389 struct nfs4_accessres res = {
2390 .server = server,
1da177e4 2391 };
1da177e4
LT		 2392 struct rpc_message msg = {
2393 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2394 .rpc_argp = &args,
2395 .rpc_resp = &res,
2396 .rpc_cred = entry->cred,
2397 };
2398 int mode = entry->mask;
2399 int status;
2400
2401 /*
2402 * Determine which access bits we want to ask for...
2403 */
2404 if (mode & MAY_READ)
2405 args.access |= NFS4_ACCESS_READ;
2406 if (S_ISDIR(inode->i_mode)) {
2407 if (mode & MAY_WRITE)
2408 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2409 if (mode & MAY_EXEC)
2410 args.access |= NFS4_ACCESS_LOOKUP;
2411 } else {
2412 if (mode & MAY_WRITE)
2413 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2414 if (mode & MAY_EXEC)
2415 args.access |= NFS4_ACCESS_EXECUTE;
2416 }
c407d41a
TM		 2417
2418 res.fattr = nfs_alloc_fattr();
2419 if (res.fattr == NULL)
2420 return -ENOMEM;
2421
cccef3b9 2422 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2423 if (!status) {
2424 entry->mask = 0;
2425 if (res.access & NFS4_ACCESS_READ)
2426 entry->mask |= MAY_READ;
2427 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2428 entry->mask |= MAY_WRITE;
2429 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2430 entry->mask |= MAY_EXEC;
c407d41a 2431 nfs_refresh_inode(inode, res.fattr);
1da177e4 2432 }
c407d41a 2433 nfs_free_fattr(res.fattr);
1da177e4
LT		 2434 return status;
2435}
2436
2437static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2438{
2439 struct nfs4_exception exception = { };
2440 int err;
2441 do {
2442 err = nfs4_handle_exception(NFS_SERVER(inode),
2443 _nfs4_proc_access(inode, entry),
2444 &exception);
2445 } while (exception.retry);
2446 return err;
2447}
2448
2449/*
2450 * TODO: For the time being, we don't try to get any attributes
2451 * along with any of the zero-copy operations READ, READDIR,
2452 * READLINK, WRITE.
2453 *
2454 * In the case of the first three, we want to put the GETATTR
2455 * after the read-type operation -- this is because it is hard
2456 * to predict the length of a GETATTR response in v4, and thus
2457 * align the READ data correctly. This means that the GETATTR
2458 * may end up partially falling into the page cache, and we should
2459 * shift it into the 'tail' of the xdr_buf before processing.
2460 * To do this efficiently, we need to know the total length
2461 * of data received, which doesn't seem to be available outside
2462 * of the RPC layer.
2463 *
2464 * In the case of WRITE, we also want to put the GETATTR after
2465 * the operation -- in this case because we want to make sure
2466 * we get the post-operation mtime and size. This means that
2467 * we can't use xdr_encode_pages() as written: we need a variant
2468 * of it which would leave room in the 'tail' iovec.
2469 *
2470 * Both of these changes to the XDR layer would in fact be quite
2471 * minor, but I decided to leave them for a subsequent patch.
2472 */
2473static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2474 unsigned int pgbase, unsigned int pglen)
2475{
2476 struct nfs4_readlink args = {
2477 .fh = NFS_FH(inode),
2478 .pgbase = pgbase,
2479 .pglen = pglen,
2480 .pages = &page,
2481 };
f50c7000 2482 struct nfs4_readlink_res res;
1da177e4
LT		 2483 struct rpc_message msg = {
2484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2485 .rpc_argp = &args,
f50c7000 2486 .rpc_resp = &res,
1da177e4
LT		 2487 };
2488
cccef3b9 2489 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2490}
2491
2492static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2493 unsigned int pgbase, unsigned int pglen)
2494{
2495 struct nfs4_exception exception = { };
2496 int err;
2497 do {
2498 err = nfs4_handle_exception(NFS_SERVER(inode),
2499 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2500 &exception);
2501 } while (exception.retry);
2502 return err;
2503}
2504
1da177e4
LT		 2505/*
2506 * Got race?
2507 * We will need to arrange for the VFS layer to provide an atomic open.
2508 * Until then, this create/open method is prone to inefficiency and race
2509 * conditions due to the lookup, create, and open VFS calls from sys_open()
2510 * placed on the wire.
2511 *
2512 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2513 * The file will be opened again in the subsequent VFS open call
2514 * (nfs4_proc_file_open).
2515 *
2516 * The open for read will just hang around to be used by any process that
2517 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2518 */
2519
2520static int
2521nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2522 int flags, struct nameidata *nd)
1da177e4 2523{
ad389da7 2524 struct path path = {
4ac91378 2525 .mnt = nd->path.mnt,
ad389da7
TM		 2526 .dentry = dentry,
2527 };
1da177e4
LT		 2528 struct nfs4_state *state;
2529 struct rpc_cred *cred;
dc0b027d 2530 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2531 int status = 0;
2532
98a8e323 2533 cred = rpc_lookup_cred();
1da177e4
LT		 2534 if (IS_ERR(cred)) {
2535 status = PTR_ERR(cred);
2536 goto out;
2537 }
dc0b027d 2538 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2539 d_drop(dentry);
1da177e4
LT		 2540 if (IS_ERR(state)) {
2541 status = PTR_ERR(state);
659bfcd6 2542 goto out_putcred;
1da177e4 2543 }
d4d9cdcb 2544 d_add(dentry, igrab(state->inode));
d75340cc 2545 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
ad389da7 2546 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2547 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2548 else
dc0b027d 2549 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2550out_putcred:
2551 put_rpccred(cred);
1da177e4
LT		 2552out:
2553 return status;
2554}
2555
2556static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2557{
16e42959 2558 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2559 struct nfs_removeargs args = {
1da177e4 2560 .fh = NFS_FH(dir),
4fdc17b2
TM		 2561 .name.len = name->len,
2562 .name.name = name->name,
16e42959
TM		 2563 .bitmask = server->attr_bitmask,
2564 };
4fdc17b2 2565 struct nfs_removeres res = {
16e42959 2566 .server = server,
1da177e4 2567 };
1da177e4 2568 struct rpc_message msg = {
4fdc17b2
TM		 2569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2570 .rpc_argp = &args,
2571 .rpc_resp = &res,
1da177e4 2572 };
d346890b
TM		 2573 int status = -ENOMEM;
2574
2575 res.dir_attr = nfs_alloc_fattr();
2576 if (res.dir_attr == NULL)
2577 goto out;
1da177e4 2578
cccef3b9 2579 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2580 if (status == 0) {
2581 update_changeattr(dir, &res.cinfo);
d346890b 2582 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2583 }
d346890b
TM		 2584 nfs_free_fattr(res.dir_attr);
2585out:
1da177e4
LT		 2586 return status;
2587}
2588
2589static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2590{
2591 struct nfs4_exception exception = { };
2592 int err;
2593 do {
2594 err = nfs4_handle_exception(NFS_SERVER(dir),
2595 _nfs4_proc_remove(dir, name),
2596 &exception);
2597 } while (exception.retry);
2598 return err;
2599}
2600
e4eff1a6 2601static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2602{
e4eff1a6
TM		 2603 struct nfs_server *server = NFS_SERVER(dir);
2604 struct nfs_removeargs *args = msg->rpc_argp;
2605 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2606
a65318bf 2607 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2608 res->server = server;
1da177e4 2609 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2610}
2611
e4eff1a6 2612static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2613{
e4eff1a6
TM		 2614 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2615
14516c3a
TM		 2616 if (!nfs4_sequence_done(task, &res->seq_res))
2617 return 0;
9e33bed5 2618 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2619 return 0;
2620 update_changeattr(dir, &res->cinfo);
d346890b 2621 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2622 return 1;
1da177e4
LT		 2623}
2624
2625static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2626 struct inode *new_dir, struct qstr *new_name)
2627{
6caf2c82 2628 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2629 struct nfs4_rename_arg arg = {
2630 .old_dir = NFS_FH(old_dir),
2631 .new_dir = NFS_FH(new_dir),
2632 .old_name = old_name,
2633 .new_name = new_name,
6caf2c82
TM		 2634 .bitmask = server->attr_bitmask,
2635 };
6caf2c82
TM		 2636 struct nfs4_rename_res res = {
2637 .server = server,
1da177e4 2638 };
1da177e4
LT		 2639 struct rpc_message msg = {
2640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2641 .rpc_argp = &arg,
2642 .rpc_resp = &res,
2643 };
011fff72 2644 int status = -ENOMEM;
1da177e4 2645
011fff72
TM		 2646 res.old_fattr = nfs_alloc_fattr();
2647 res.new_fattr = nfs_alloc_fattr();
2648 if (res.old_fattr == NULL || res.new_fattr == NULL)
2649 goto out;
1da177e4 2650
011fff72 2651 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2652 if (!status) {
2653 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2654 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2655 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2656 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2657 }
011fff72
TM		 2658out:
2659 nfs_free_fattr(res.new_fattr);
2660 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2661 return status;
2662}
2663
2664static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2665 struct inode *new_dir, struct qstr *new_name)
2666{
2667 struct nfs4_exception exception = { };
2668 int err;
2669 do {
2670 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2671 _nfs4_proc_rename(old_dir, old_name,
2672 new_dir, new_name),
2673 &exception);
2674 } while (exception.retry);
2675 return err;
2676}
2677
2678static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2679{
91ba2eee 2680 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2681 struct nfs4_link_arg arg = {
2682 .fh = NFS_FH(inode),
2683 .dir_fh = NFS_FH(dir),
2684 .name = name,
91ba2eee
TM		 2685 .bitmask = server->attr_bitmask,
2686 };
91ba2eee
TM		 2687 struct nfs4_link_res res = {
2688 .server = server,
1da177e4 2689 };
1da177e4
LT		 2690 struct rpc_message msg = {
2691 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2692 .rpc_argp = &arg,
91ba2eee 2693 .rpc_resp = &res,
1da177e4 2694 };
136f2627
TM		 2695 int status = -ENOMEM;
2696
2697 res.fattr = nfs_alloc_fattr();
2698 res.dir_attr = nfs_alloc_fattr();
2699 if (res.fattr == NULL || res.dir_attr == NULL)
2700 goto out;
1da177e4 2701
cccef3b9 2702 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2703 if (!status) {
2704 update_changeattr(dir, &res.cinfo);
2705 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2706 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2707 }
136f2627
TM		 2708out:
2709 nfs_free_fattr(res.dir_attr);
2710 nfs_free_fattr(res.fattr);
1da177e4
LT		 2711 return status;
2712}
2713
2714static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2715{
2716 struct nfs4_exception exception = { };
2717 int err;
2718 do {
2719 err = nfs4_handle_exception(NFS_SERVER(inode),
2720 _nfs4_proc_link(inode, dir, name),
2721 &exception);
2722 } while (exception.retry);
2723 return err;
2724}
2725
57dc9a57
TM		 2726struct nfs4_createdata {
2727 struct rpc_message msg;
2728 struct nfs4_create_arg arg;
2729 struct nfs4_create_res res;
2730 struct nfs_fh fh;
2731 struct nfs_fattr fattr;
2732 struct nfs_fattr dir_fattr;
2733};
2734
2735static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2736 struct qstr *name, struct iattr *sattr, u32 ftype)
2737{
2738 struct nfs4_createdata *data;
2739
2740 data = kzalloc(sizeof(*data), GFP_KERNEL);
2741 if (data != NULL) {
2742 struct nfs_server *server = NFS_SERVER(dir);
2743
2744 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2745 data->msg.rpc_argp = &data->arg;
2746 data->msg.rpc_resp = &data->res;
2747 data->arg.dir_fh = NFS_FH(dir);
2748 data->arg.server = server;
2749 data->arg.name = name;
2750 data->arg.attrs = sattr;
2751 data->arg.ftype = ftype;
2752 data->arg.bitmask = server->attr_bitmask;
2753 data->res.server = server;
2754 data->res.fh = &data->fh;
2755 data->res.fattr = &data->fattr;
2756 data->res.dir_fattr = &data->dir_fattr;
2757 nfs_fattr_init(data->res.fattr);
2758 nfs_fattr_init(data->res.dir_fattr);
2759 }
2760 return data;
2761}
2762
2763static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2764{
cccef3b9
AA		 2765 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2766 &data->arg, &data->res, 1);
57dc9a57
TM		 2767 if (status == 0) {
2768 update_changeattr(dir, &data->res.dir_cinfo);
2769 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2770 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2771 }
2772 return status;
2773}
2774
2775static void nfs4_free_createdata(struct nfs4_createdata *data)
2776{
2777 kfree(data);
2778}
2779
4f390c15 2780static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2781 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2782{
57dc9a57
TM		 2783 struct nfs4_createdata *data;
2784 int status = -ENAMETOOLONG;
1da177e4 2785
94a6d753 2786 if (len > NFS4_MAXPATHLEN)
57dc9a57 2787 goto out;
4f390c15 2788
57dc9a57
TM		 2789 status = -ENOMEM;
2790 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2791 if (data == NULL)
2792 goto out;
2793
2794 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2795 data->arg.u.symlink.pages = &page;
2796 data->arg.u.symlink.len = len;
1da177e4 2797
57dc9a57
TM		 2798 status = nfs4_do_create(dir, dentry, data);
2799
2800 nfs4_free_createdata(data);
2801out:
1da177e4
LT		 2802 return status;
2803}
2804
4f390c15 2805static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2806 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2807{
2808 struct nfs4_exception exception = { };
2809 int err;
2810 do {
2811 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2812 _nfs4_proc_symlink(dir, dentry, page,
2813 len, sattr),
1da177e4
LT		 2814 &exception);
2815 } while (exception.retry);
2816 return err;
2817}
2818
2819static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2820 struct iattr *sattr)
2821{
57dc9a57
TM		 2822 struct nfs4_createdata *data;
2823 int status = -ENOMEM;
1da177e4 2824
57dc9a57
TM		 2825 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2826 if (data == NULL)
2827 goto out;
2828
2829 status = nfs4_do_create(dir, dentry, data);
2830
2831 nfs4_free_createdata(data);
2832out:
1da177e4
LT		 2833 return status;
2834}
2835
2836static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2837 struct iattr *sattr)
2838{
2839 struct nfs4_exception exception = { };
2840 int err;
2841 do {
2842 err = nfs4_handle_exception(NFS_SERVER(dir),
2843 _nfs4_proc_mkdir(dir, dentry, sattr),
2844 &exception);
2845 } while (exception.retry);
2846 return err;
2847}
2848
2849static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2850 u64 cookie, struct page *page, unsigned int count, int plus)
2851{
2852 struct inode *dir = dentry->d_inode;
2853 struct nfs4_readdir_arg args = {
2854 .fh = NFS_FH(dir),
2855 .pages = &page,
2856 .pgbase = 0,
2857 .count = count,
96d25e53 2858 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2859 };
2860 struct nfs4_readdir_res res;
2861 struct rpc_message msg = {
2862 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2863 .rpc_argp = &args,
2864 .rpc_resp = &res,
2865 .rpc_cred = cred,
2866 };
2867 int status;
2868
3110ff80 2869 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2870 dentry->d_parent->d_name.name,
2871 dentry->d_name.name,
2872 (unsigned long long)cookie);
1da177e4
LT		 2873 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2874 res.pgbase = args.pgbase;
cccef3b9 2875 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2876 if (status == 0)
2877 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2878
2879 nfs_invalidate_atime(dir);
2880
3110ff80 2881 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2882 return status;
2883}
2884
2885static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2886 u64 cookie, struct page *page, unsigned int count, int plus)
2887{
2888 struct nfs4_exception exception = { };
2889 int err;
2890 do {
2891 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2892 _nfs4_proc_readdir(dentry, cred, cookie,
2893 page, count, plus),
2894 &exception);
2895 } while (exception.retry);
2896 return err;
2897}
2898
2899static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2900 struct iattr *sattr, dev_t rdev)
2901{
57dc9a57
TM		 2902 struct nfs4_createdata *data;
2903 int mode = sattr->ia_mode;
2904 int status = -ENOMEM;
1da177e4
LT		 2905
2906 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2907 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2908
2909 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2910 if (data == NULL)
2911 goto out;
2912
1da177e4 2913 if (S_ISFIFO(mode))
57dc9a57 2914 data->arg.ftype = NF4FIFO;
1da177e4 2915 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2916 data->arg.ftype = NF4BLK;
2917 data->arg.u.device.specdata1 = MAJOR(rdev);
2918 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2919 }
2920 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2921 data->arg.ftype = NF4CHR;
2922 data->arg.u.device.specdata1 = MAJOR(rdev);
2923 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2924 }
1da177e4 2925
57dc9a57
TM		 2926 status = nfs4_do_create(dir, dentry, data);
2927
2928 nfs4_free_createdata(data);
2929out:
1da177e4
LT		 2930 return status;
2931}
2932
2933static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2934 struct iattr *sattr, dev_t rdev)
2935{
2936 struct nfs4_exception exception = { };
2937 int err;
2938 do {
2939 err = nfs4_handle_exception(NFS_SERVER(dir),
2940 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2941 &exception);
2942 } while (exception.retry);
2943 return err;
2944}
2945
2946static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2947 struct nfs_fsstat *fsstat)
2948{
2949 struct nfs4_statfs_arg args = {
2950 .fh = fhandle,
2951 .bitmask = server->attr_bitmask,
2952 };
24ad148a
BH		 2953 struct nfs4_statfs_res res = {
2954 .fsstat = fsstat,
2955 };
1da177e4
LT		 2956 struct rpc_message msg = {
2957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2958 .rpc_argp = &args,
24ad148a 2959 .rpc_resp = &res,
1da177e4
LT		 2960 };
2961
0e574af1 2962 nfs_fattr_init(fsstat->fattr);
cccef3b9 2963 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2964}
2965
2966static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2967{
2968 struct nfs4_exception exception = { };
2969 int err;
2970 do {
2971 err = nfs4_handle_exception(server,
2972 _nfs4_proc_statfs(server, fhandle, fsstat),
2973 &exception);
2974 } while (exception.retry);
2975 return err;
2976}
2977
2978static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2979 struct nfs_fsinfo *fsinfo)
2980{
2981 struct nfs4_fsinfo_arg args = {
2982 .fh = fhandle,
2983 .bitmask = server->attr_bitmask,
2984 };
3dda5e43
BH		 2985 struct nfs4_fsinfo_res res = {
2986 .fsinfo = fsinfo,
2987 };
1da177e4
LT		 2988 struct rpc_message msg = {
2989 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2990 .rpc_argp = &args,
3dda5e43 2991 .rpc_resp = &res,
1da177e4
LT		 2992 };
2993
cccef3b9 2994 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2995}
2996
2997static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2998{
2999 struct nfs4_exception exception = { };
3000 int err;
3001
3002 do {
3003 err = nfs4_handle_exception(server,
3004 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3005 &exception);
3006 } while (exception.retry);
3007 return err;
3008}
3009
3010static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3011{
0e574af1 3012 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3013 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3014}
3015
3016static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3017 struct nfs_pathconf *pathconf)
3018{
3019 struct nfs4_pathconf_arg args = {
3020 .fh = fhandle,
3021 .bitmask = server->attr_bitmask,
3022 };
d45b2989
BH		 3023 struct nfs4_pathconf_res res = {
3024 .pathconf = pathconf,
3025 };
1da177e4
LT		 3026 struct rpc_message msg = {
3027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3028 .rpc_argp = &args,
d45b2989 3029 .rpc_resp = &res,
1da177e4
LT		 3030 };
3031
3032 /* None of the pathconf attributes are mandatory to implement */
3033 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3034 memset(pathconf, 0, sizeof(*pathconf));
3035 return 0;
3036 }
3037
0e574af1 3038 nfs_fattr_init(pathconf->fattr);
cccef3b9 3039 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3040}
3041
3042static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3043 struct nfs_pathconf *pathconf)
3044{
3045 struct nfs4_exception exception = { };
3046 int err;
3047
3048 do {
3049 err = nfs4_handle_exception(server,
3050 _nfs4_proc_pathconf(server, fhandle, pathconf),
3051 &exception);
3052 } while (exception.retry);
3053 return err;
3054}
3055
ec06c096 3056static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3057{
ec06c096 3058 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3059
f11c88af
AA		 3060 dprintk("--> %s\n", __func__);
3061
14516c3a
TM		 3062 if (!nfs4_sequence_done(task, &data->res.seq_res))
3063 return -EAGAIN;
f11c88af 3064
9e33bed5 3065 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3066 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3067 return -EAGAIN;
1da177e4 3068 }
8850df99
TM		 3069
3070 nfs_invalidate_atime(data->inode);
1da177e4 3071 if (task->tk_status > 0)
ec06c096
TM		 3072 renew_lease(server, data->timestamp);
3073 return 0;
1da177e4
LT		 3074}
3075
bdc7f021 3076static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3077{
1da177e4 3078 data->timestamp = jiffies;
bdc7f021 3079 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3080}
3081
788e7a89 3082static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3083{
1da177e4
LT		 3084 struct inode *inode = data->inode;
3085
14516c3a
TM		 3086 if (!nfs4_sequence_done(task, &data->res.seq_res))
3087 return -EAGAIN;
def6ed7e 3088
9e33bed5 3089 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3090 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3091 return -EAGAIN;
1da177e4 3092 }
4f9838c7 3093 if (task->tk_status >= 0) {
1da177e4 3094 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3095 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3096 }
788e7a89 3097 return 0;
1da177e4
LT		 3098}
3099
bdc7f021 3100static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3101{
bdc7f021
TM		 3102 struct nfs_server *server = NFS_SERVER(data->inode);
3103
a65318bf 3104 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3105 data->res.server = server;
1da177e4
LT		 3106 data->timestamp = jiffies;
3107
bdc7f021 3108 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3109}
3110
788e7a89 3111static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3112{
1da177e4
LT		 3113 struct inode *inode = data->inode;
3114
14516c3a
TM		 3115 if (!nfs4_sequence_done(task, &data->res.seq_res))
3116 return -EAGAIN;
3117
9e33bed5 3118 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3119 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3120 return -EAGAIN;
1da177e4 3121 }
9e08a3c5 3122 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3123 return 0;
1da177e4
LT		 3124}
3125
bdc7f021 3126static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3127{
788e7a89 3128 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3129
a65318bf 3130 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3131 data->res.server = server;
bdc7f021 3132 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3133}
3134
9bc4e3ca
CL		 3135struct nfs4_renewdata {
3136 struct nfs_client *client;
3137 unsigned long timestamp;
3138};
3139
1da177e4
LT		 3140/*
3141 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3142 * standalone procedure for queueing an asynchronous RENEW.
3143 */
9bc4e3ca 3144static void nfs4_renew_release(void *calldata)
dc96aef9 3145{
9bc4e3ca
CL		 3146 struct nfs4_renewdata *data = calldata;
3147 struct nfs_client *clp = data->client;
dc96aef9 3148
0851de06
AB		 3149 if (atomic_read(&clp->cl_count) > 1)
3150 nfs4_schedule_state_renewal(clp);
3151 nfs_put_client(clp);
9bc4e3ca 3152 kfree(data);
dc96aef9
AB		 3153}
3154
9bc4e3ca 3155static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3156{
9bc4e3ca
CL		 3157 struct nfs4_renewdata *data = calldata;
3158 struct nfs_client *clp = data->client;
3159 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3160
3161 if (task->tk_status < 0) {
95baa25c
TM		 3162 /* Unless we're shutting down, schedule state recovery! */
3163 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3164 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3165 return;
3166 }
452e9352 3167 do_renew_lease(clp, timestamp);
1da177e4
LT		 3168}
3169
963d8fe5
TM		 3170static const struct rpc_call_ops nfs4_renew_ops = {
3171 .rpc_call_done = nfs4_renew_done,
dc96aef9 3172 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3173};
3174
adfa6f98 3175int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3176{
3177 struct rpc_message msg = {
3178 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3179 .rpc_argp = clp,
b4454fe1 3180 .rpc_cred = cred,
1da177e4 3181 };
9bc4e3ca 3182 struct nfs4_renewdata *data;
1da177e4 3183
0851de06
AB		 3184 if (!atomic_inc_not_zero(&clp->cl_count))
3185 return -EIO;
9bc4e3ca
CL		 3186 data = kmalloc(sizeof(*data), GFP_KERNEL);
3187 if (data == NULL)
3188 return -ENOMEM;
3189 data->client = clp;
3190 data->timestamp = jiffies;
1da177e4 3191 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3192 &nfs4_renew_ops, data);
1da177e4
LT		 3193}
3194
adfa6f98 3195int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3196{
3197 struct rpc_message msg = {
3198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3199 .rpc_argp = clp,
b4454fe1 3200 .rpc_cred = cred,
1da177e4
LT		 3201 };
3202 unsigned long now = jiffies;
3203 int status;
3204
3205 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3206 if (status < 0)
3207 return status;
452e9352 3208 do_renew_lease(clp, now);
1da177e4
LT		 3209 return 0;
3210}
3211
aa1870af
BF		 3212static inline int nfs4_server_supports_acls(struct nfs_server *server)
3213{
3214 return (server->caps & NFS_CAP_ACLS)
3215 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3216 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3217}
3218
3219/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3220 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3221 * the stack.
3222 */
3223#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3224
3225static void buf_to_pages(const void *buf, size_t buflen,
3226 struct page **pages, unsigned int *pgbase)
3227{
3228 const void *p = buf;
3229
3230 *pgbase = offset_in_page(buf);
3231 p -= *pgbase;
3232 while (p < buf + buflen) {
3233 *(pages++) = virt_to_page(p);
3234 p += PAGE_CACHE_SIZE;
3235 }
3236}
3237
e50a1c2e
BF		 3238struct nfs4_cached_acl {
3239 int cached;
3240 size_t len;
3e9d4154 3241 char data[0];
e50a1c2e
BF		 3242};
3243
3244static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3245{
3246 struct nfs_inode *nfsi = NFS_I(inode);
3247
3248 spin_lock(&inode->i_lock);
3249 kfree(nfsi->nfs4_acl);
3250 nfsi->nfs4_acl = acl;
3251 spin_unlock(&inode->i_lock);
3252}
3253
3254static void nfs4_zap_acl_attr(struct inode *inode)
3255{
3256 nfs4_set_cached_acl(inode, NULL);
3257}
3258
3259static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3260{
3261 struct nfs_inode *nfsi = NFS_I(inode);
3262 struct nfs4_cached_acl *acl;
3263 int ret = -ENOENT;
3264
3265 spin_lock(&inode->i_lock);
3266 acl = nfsi->nfs4_acl;
3267 if (acl == NULL)
3268 goto out;
3269 if (buf == NULL) /* user is just asking for length */
3270 goto out_len;
3271 if (acl->cached == 0)
3272 goto out;
3273 ret = -ERANGE; /* see getxattr(2) man page */
3274 if (acl->len > buflen)
3275 goto out;
3276 memcpy(buf, acl->data, acl->len);
3277out_len:
3278 ret = acl->len;
3279out:
3280 spin_unlock(&inode->i_lock);
3281 return ret;
3282}
3283
3284static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3285{
3286 struct nfs4_cached_acl *acl;
3287
3288 if (buf && acl_len <= PAGE_SIZE) {
3289 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3290 if (acl == NULL)
3291 goto out;
3292 acl->cached = 1;
3293 memcpy(acl->data, buf, acl_len);
3294 } else {
3295 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3296 if (acl == NULL)
3297 goto out;
3298 acl->cached = 0;
3299 }
3300 acl->len = acl_len;
3301out:
3302 nfs4_set_cached_acl(inode, acl);
3303}
3304
16b4289c 3305static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3306{
aa1870af
BF		 3307 struct page *pages[NFS4ACL_MAXPAGES];
3308 struct nfs_getaclargs args = {
3309 .fh = NFS_FH(inode),
3310 .acl_pages = pages,
3311 .acl_len = buflen,
3312 };
663c79b3
BH		 3313 struct nfs_getaclres res = {
3314 .acl_len = buflen,
3315 };
e50a1c2e 3316 void *resp_buf;
aa1870af
BF		 3317 struct rpc_message msg = {
3318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3319 .rpc_argp = &args,
663c79b3 3320 .rpc_resp = &res,
aa1870af 3321 };
e50a1c2e 3322 struct page *localpage = NULL;
aa1870af
BF		 3323 int ret;
3324
e50a1c2e
BF		 3325 if (buflen < PAGE_SIZE) {
3326 /* As long as we're doing a round trip to the server anyway,
3327 * let's be prepared for a page of acl data. */
3328 localpage = alloc_page(GFP_KERNEL);
3329 resp_buf = page_address(localpage);
3330 if (localpage == NULL)
3331 return -ENOMEM;
3332 args.acl_pages[0] = localpage;
3333 args.acl_pgbase = 0;
663c79b3 3334 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3335 } else {
3336 resp_buf = buf;
3337 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3338 }
cccef3b9 3339 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3340 if (ret)
3341 goto out_free;
663c79b3
BH		 3342 if (res.acl_len > args.acl_len)
3343 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3344 else
663c79b3 3345 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3346 if (buf) {
3347 ret = -ERANGE;
663c79b3 3348 if (res.acl_len > buflen)
e50a1c2e
BF		 3349 goto out_free;
3350 if (localpage)
663c79b3 3351 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3352 }
663c79b3 3353 ret = res.acl_len;
e50a1c2e
BF		 3354out_free:
3355 if (localpage)
3356 __free_page(localpage);
aa1870af
BF		 3357 return ret;
3358}
3359
16b4289c
TM		 3360static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3361{
3362 struct nfs4_exception exception = { };
3363 ssize_t ret;
3364 do {
3365 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3366 if (ret >= 0)
3367 break;
3368 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3369 } while (exception.retry);
3370 return ret;
3371}
3372
e50a1c2e
BF		 3373static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3374{
3375 struct nfs_server *server = NFS_SERVER(inode);
3376 int ret;
3377
3378 if (!nfs4_server_supports_acls(server))
3379 return -EOPNOTSUPP;
3380 ret = nfs_revalidate_inode(server, inode);
3381 if (ret < 0)
3382 return ret;
3383 ret = nfs4_read_cached_acl(inode, buf, buflen);
3384 if (ret != -ENOENT)
3385 return ret;
3386 return nfs4_get_acl_uncached(inode, buf, buflen);
3387}
3388
16b4289c 3389static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3390{
3391 struct nfs_server *server = NFS_SERVER(inode);
3392 struct page *pages[NFS4ACL_MAXPAGES];
3393 struct nfs_setaclargs arg = {
3394 .fh = NFS_FH(inode),
3395 .acl_pages = pages,
3396 .acl_len = buflen,
3397 };
73c403a9 3398 struct nfs_setaclres res;
4b580ee3
BF		 3399 struct rpc_message msg = {
3400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3401 .rpc_argp = &arg,
73c403a9 3402 .rpc_resp = &res,
4b580ee3
BF		 3403 };
3404 int ret;
3405
3406 if (!nfs4_server_supports_acls(server))
3407 return -EOPNOTSUPP;
642ac549 3408 nfs_inode_return_delegation(inode);
4b580ee3 3409 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3410 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3411 nfs_access_zap_cache(inode);
3412 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3413 return ret;
3414}
3415
16b4289c
TM		 3416static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3417{
3418 struct nfs4_exception exception = { };
3419 int err;
3420 do {
3421 err = nfs4_handle_exception(NFS_SERVER(inode),
3422 __nfs4_proc_set_acl(inode, buf, buflen),
3423 &exception);
3424 } while (exception.retry);
3425 return err;
3426}
3427
1da177e4 3428static int
aa5190d0 3429nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3430{
aa5190d0
TM		 3431 struct nfs_client *clp = server->nfs_client;
3432
3433 if (task->tk_status >= 0)
1da177e4
LT		 3434 return 0;
3435 switch(task->tk_status) {
9e33bed5
TM		 3436 case -NFS4ERR_ADMIN_REVOKED:
3437 case -NFS4ERR_BAD_STATEID:
3438 case -NFS4ERR_OPENMODE:
3439 if (state == NULL)
3440 break;
3441 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3442 goto do_state_recovery;
1da177e4 3443 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3444 if (state == NULL)
3445 break;
3446 nfs4_state_mark_reclaim_reboot(clp, state);
3447 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3448 case -NFS4ERR_EXPIRED:
a2c0b9e2 3449 goto do_state_recovery;
4745e315
AA		 3450#if defined(CONFIG_NFS_V4_1)
3451 case -NFS4ERR_BADSESSION:
3452 case -NFS4ERR_BADSLOT:
3453 case -NFS4ERR_BAD_HIGH_SLOT:
3454 case -NFS4ERR_DEADSESSION:
3455 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3456 case -NFS4ERR_SEQ_FALSE_RETRY:
3457 case -NFS4ERR_SEQ_MISORDERED:
3458 dprintk("%s ERROR %d, Reset session\n", __func__,
3459 task->tk_status);
0b9e2d41 3460 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3461 task->tk_status = 0;
3462 return -EAGAIN;
3463#endif /* CONFIG_NFS_V4_1 */
1da177e4 3464 case -NFS4ERR_DELAY:
aa5190d0 3465 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3466 case -NFS4ERR_GRACE:
2c643488 3467 case -EKEYEXPIRED:
1da177e4
LT		 3468 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3469 task->tk_status = 0;
3470 return -EAGAIN;
3471 case -NFS4ERR_OLD_STATEID:
3472 task->tk_status = 0;
3473 return -EAGAIN;
3474 }
3475 task->tk_status = nfs4_map_errors(task->tk_status);
3476 return 0;
a2c0b9e2
TM		 3477do_state_recovery:
3478 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3479 nfs4_schedule_state_recovery(clp);
3480 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3481 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3482 task->tk_status = 0;
3483 return -EAGAIN;
1da177e4
LT		 3484}
3485
bb8b27e5
TM		 3486int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3487 unsigned short port, struct rpc_cred *cred,
3488 struct nfs4_setclientid_res *res)
1da177e4
LT		 3489{
3490 nfs4_verifier sc_verifier;
3491 struct nfs4_setclientid setclientid = {
3492 .sc_verifier = &sc_verifier,
3493 .sc_prog = program,
3494 };
3495 struct rpc_message msg = {
3496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3497 .rpc_argp = &setclientid,
bb8b27e5 3498 .rpc_resp = res,
286d7d6a 3499 .rpc_cred = cred,
1da177e4 3500 };
bc4785cd 3501 __be32 *p;
1da177e4
LT		 3502 int loop = 0;
3503 int status;
3504
bc4785cd 3505 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3506 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3507 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3508
3509 for(;;) {
3510 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3511 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3512 clp->cl_ipaddr,
3513 rpc_peeraddr2str(clp->cl_rpcclient,
3514 RPC_DISPLAY_ADDR),
69dd716c
TM		 3515 rpc_peeraddr2str(clp->cl_rpcclient,
3516 RPC_DISPLAY_PROTO),
78ea323b 3517 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3518 clp->cl_id_uniquifier);
3519 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3520 sizeof(setclientid.sc_netid),
3521 rpc_peeraddr2str(clp->cl_rpcclient,
3522 RPC_DISPLAY_NETID));
1da177e4 3523 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3524 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3525 clp->cl_ipaddr, port >> 8, port & 255);
3526
3527 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3528 if (status != -NFS4ERR_CLID_INUSE)
3529 break;
3530 if (signalled())
3531 break;
3532 if (loop++ & 1)
3533 ssleep(clp->cl_lease_time + 1);
3534 else
3535 if (++clp->cl_id_uniquifier == 0)
3536 break;
3537 }
3538 return status;
3539}
3540
bb8b27e5
TM		 3541static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3542 struct nfs4_setclientid_res *arg,
3543 struct rpc_cred *cred)
1da177e4
LT		 3544{
3545 struct nfs_fsinfo fsinfo;
3546 struct rpc_message msg = {
3547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3548 .rpc_argp = arg,
1da177e4 3549 .rpc_resp = &fsinfo,
286d7d6a 3550 .rpc_cred = cred,
1da177e4
LT		 3551 };
3552 unsigned long now;
3553 int status;
3554
3555 now = jiffies;
3556 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3557 if (status == 0) {
3558 spin_lock(&clp->cl_lock);
3559 clp->cl_lease_time = fsinfo.lease_time * HZ;
3560 clp->cl_last_renewal = now;
3561 spin_unlock(&clp->cl_lock);
3562 }
3563 return status;
3564}
3565
bb8b27e5
TM		 3566int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3567 struct nfs4_setclientid_res *arg,
3568 struct rpc_cred *cred)
51581f3b 3569{
77e03677 3570 long timeout = 0;
51581f3b
TM		 3571 int err;
3572 do {
bb8b27e5 3573 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3574 switch (err) {
3575 case 0:
3576 return err;
3577 case -NFS4ERR_RESOURCE:
3578 /* The IBM lawyers misread another document! */
3579 case -NFS4ERR_DELAY:
2c643488 3580 case -EKEYEXPIRED:
51581f3b
TM		 3581 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3582 }
3583 } while (err == 0);
3584 return err;
3585}
3586
fe650407
TM		 3587struct nfs4_delegreturndata {
3588 struct nfs4_delegreturnargs args;
fa178f29 3589 struct nfs4_delegreturnres res;
fe650407
TM		 3590 struct nfs_fh fh;
3591 nfs4_stateid stateid;
26e976a8 3592 unsigned long timestamp;
fa178f29 3593 struct nfs_fattr fattr;
fe650407
TM		 3594 int rpc_status;
3595};
3596
fe650407
TM		 3597static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3598{
3599 struct nfs4_delegreturndata *data = calldata;
938e1010 3600
14516c3a
TM		 3601 if (!nfs4_sequence_done(task, &data->res.seq_res))
3602 return;
938e1010 3603
79708861
RL		 3604 switch (task->tk_status) {
3605 case -NFS4ERR_STALE_STATEID:
3606 case -NFS4ERR_EXPIRED:
3607 case 0:
fa178f29 3608 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3609 break;
3610 default:
3611 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3612 -EAGAIN) {
3613 nfs_restart_rpc(task, data->res.server->nfs_client);
3614 return;
3615 }
3616 }
3617 data->rpc_status = task->tk_status;
fe650407
TM		 3618}
3619
3620static void nfs4_delegreturn_release(void *calldata)
3621{
fe650407
TM		 3622 kfree(calldata);
3623}
3624
938e1010
AA		 3625#if defined(CONFIG_NFS_V4_1)
3626static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3627{
3628 struct nfs4_delegreturndata *d_data;
3629
3630 d_data = (struct nfs4_delegreturndata *)data;
3631
035168ab 3632 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3633 &d_data->args.seq_args,
3634 &d_data->res.seq_res, 1, task))
3635 return;
3636 rpc_call_start(task);
3637}
3638#endif /* CONFIG_NFS_V4_1 */
3639
c8d149f3 3640static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3641#if defined(CONFIG_NFS_V4_1)
3642 .rpc_call_prepare = nfs4_delegreturn_prepare,
3643#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3644 .rpc_call_done = nfs4_delegreturn_done,
3645 .rpc_release = nfs4_delegreturn_release,
3646};
3647
e6f81075 3648static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3649{
3650 struct nfs4_delegreturndata *data;
fa178f29 3651 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3652 struct rpc_task *task;
5138fde0
TM		 3653 struct rpc_message msg = {
3654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3655 .rpc_cred = cred,
3656 };
c970aa85
TM		 3657 struct rpc_task_setup task_setup_data = {
3658 .rpc_client = server->client,
5138fde0 3659 .rpc_message = &msg,
c970aa85
TM		 3660 .callback_ops = &nfs4_delegreturn_ops,
3661 .flags = RPC_TASK_ASYNC,
3662 };
e6f81075 3663 int status = 0;
fe650407 3664
8535b2be 3665 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3666 if (data == NULL)
3667 return -ENOMEM;
3668 data->args.fhandle = &data->fh;
3669 data->args.stateid = &data->stateid;
fa178f29 3670 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3671 nfs_copy_fh(&data->fh, NFS_FH(inode));
3672 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3673 data->res.fattr = &data->fattr;
3674 data->res.server = server;
5f7dbd5c 3675 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3676 nfs_fattr_init(data->res.fattr);
26e976a8 3677 data->timestamp = jiffies;
fe650407
TM		 3678 data->rpc_status = 0;
3679
c970aa85 3680 task_setup_data.callback_data = data;
5138fde0
TM		 3681 msg.rpc_argp = &data->args,
3682 msg.rpc_resp = &data->res,
c970aa85 3683 task = rpc_run_task(&task_setup_data);
7a1218a2 3684 if (IS_ERR(task))
fe650407 3685 return PTR_ERR(task);
e6f81075
TM		 3686 if (!issync)
3687 goto out;
fe650407 3688 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3689 if (status != 0)
3690 goto out;
3691 status = data->rpc_status;
3692 if (status != 0)
3693 goto out;
3694 nfs_refresh_inode(inode, &data->fattr);
3695out:
e6b3c4db 3696 rpc_put_task(task);
fe650407 3697 return status;
1da177e4
LT		 3698}
3699
e6f81075 3700int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3701{
3702 struct nfs_server *server = NFS_SERVER(inode);
3703 struct nfs4_exception exception = { };
3704 int err;
3705 do {
e6f81075 3706 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3707 switch (err) {
3708 case -NFS4ERR_STALE_STATEID:
3709 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3710 case 0:
3711 return 0;
3712 }
3713 err = nfs4_handle_exception(server, err, &exception);
3714 } while (exception.retry);
3715 return err;
3716}
3717
3718#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3719#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3720
3721/*
3722 * sleep, with exponential backoff, and retry the LOCK operation.
3723 */
3724static unsigned long
3725nfs4_set_lock_task_retry(unsigned long timeout)
3726{
150030b7 3727 schedule_timeout_killable(timeout);
1da177e4
LT		 3728 timeout <<= 1;
3729 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3730 return NFS4_LOCK_MAXTIMEOUT;
3731 return timeout;
3732}
3733
1da177e4
LT		 3734static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3735{
3736 struct inode *inode = state->inode;
3737 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3738 struct nfs_client *clp = server->nfs_client;
911d1aaf 3739 struct nfs_lockt_args arg = {
1da177e4 3740 .fh = NFS_FH(inode),
911d1aaf 3741 .fl = request,
1da177e4 3742 };
911d1aaf
TM		 3743 struct nfs_lockt_res res = {
3744 .denied = request,
1da177e4
LT		 3745 };
3746 struct rpc_message msg = {
3747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3748 .rpc_argp = &arg,
3749 .rpc_resp = &res,
3750 .rpc_cred = state->owner->so_cred,
3751 };
1da177e4
LT		 3752 struct nfs4_lock_state *lsp;
3753 int status;
3754
911d1aaf 3755 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3756 status = nfs4_set_lock_state(state, request);
3757 if (status != 0)
3758 goto out;
3759 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3760 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3761 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3762 switch (status) {
3763 case 0:
3764 request->fl_type = F_UNLCK;
3765 break;
3766 case -NFS4ERR_DENIED:
3767 status = 0;
1da177e4 3768 }
70cc6487 3769 request->fl_ops->fl_release_private(request);
8d0a8a9d 3770out:
1da177e4
LT		 3771 return status;
3772}
3773
3774static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3775{
3776 struct nfs4_exception exception = { };
3777 int err;
3778
3779 do {
3780 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3781 _nfs4_proc_getlk(state, cmd, request),
3782 &exception);
3783 } while (exception.retry);
3784 return err;
3785}
3786
3787static int do_vfs_lock(struct file *file, struct file_lock *fl)
3788{
3789 int res = 0;
3790 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3791 case FL_POSIX:
3792 res = posix_lock_file_wait(file, fl);
3793 break;
3794 case FL_FLOCK:
3795 res = flock_lock_file_wait(file, fl);
3796 break;
3797 default:
3798 BUG();
3799 }
1da177e4
LT		 3800 return res;
3801}
3802
faf5f49c 3803struct nfs4_unlockdata {
911d1aaf
TM		 3804 struct nfs_locku_args arg;
3805 struct nfs_locku_res res;
faf5f49c
TM		 3806 struct nfs4_lock_state *lsp;
3807 struct nfs_open_context *ctx;
911d1aaf
TM		 3808 struct file_lock fl;
3809 const struct nfs_server *server;
26e976a8 3810 unsigned long timestamp;
faf5f49c
TM		 3811};
3812
911d1aaf
TM		 3813static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3814 struct nfs_open_context *ctx,
3815 struct nfs4_lock_state *lsp,
3816 struct nfs_seqid *seqid)
3817{
3818 struct nfs4_unlockdata *p;
3819 struct inode *inode = lsp->ls_state->inode;
3820
8535b2be 3821 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3822 if (p == NULL)
3823 return NULL;
3824 p->arg.fh = NFS_FH(inode);
3825 p->arg.fl = &p->fl;
3826 p->arg.seqid = seqid;
c1d51931 3827 p->res.seqid = seqid;
5f7dbd5c 3828 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3829 p->arg.stateid = &lsp->ls_stateid;
3830 p->lsp = lsp;
3831 atomic_inc(&lsp->ls_count);
3832 /* Ensure we don't close file until we're done freeing locks! */
3833 p->ctx = get_nfs_open_context(ctx);
3834 memcpy(&p->fl, fl, sizeof(p->fl));
3835 p->server = NFS_SERVER(inode);
3836 return p;
3837}
3838
06f814a3 3839static void nfs4_locku_release_calldata(void *data)
faf5f49c 3840{
963d8fe5 3841 struct nfs4_unlockdata *calldata = data;
911d1aaf 3842 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3843 nfs4_put_lock_state(calldata->lsp);
3844 put_nfs_open_context(calldata->ctx);
3845 kfree(calldata);
faf5f49c
TM		 3846}
3847
963d8fe5 3848static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3849{
963d8fe5 3850 struct nfs4_unlockdata *calldata = data;
faf5f49c 3851
14516c3a
TM		 3852 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3853 return;
faf5f49c
TM		 3854 switch (task->tk_status) {
3855 case 0:
3856 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3857 calldata->res.stateid.data,
faf5f49c 3858 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3859 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3860 break;
9e33bed5
TM		 3861 case -NFS4ERR_BAD_STATEID:
3862 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3863 case -NFS4ERR_STALE_STATEID:
3864 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3865 break;
3866 default:
9e33bed5 3867 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3868 nfs_restart_rpc(task,
d61e612a 3869 calldata->server->nfs_client);
faf5f49c 3870 }
faf5f49c
TM		 3871}
3872
4ce70ada 3873static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3874{
4ce70ada 3875 struct nfs4_unlockdata *calldata = data;
faf5f49c 3876
911d1aaf 3877 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3878 return;
3879 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3880 /* Note: exit _without_ running nfs4_locku_done */
3881 task->tk_action = NULL;
faf5f49c
TM		 3882 return;
3883 }
26e976a8 3884 calldata->timestamp = jiffies;
035168ab 3885 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3886 &calldata->arg.seq_args,
3887 &calldata->res.seq_res, 1, task))
3888 return;
5138fde0 3889 rpc_call_start(task);
faf5f49c
TM		 3890}
3891
963d8fe5 3892static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3893 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3894 .rpc_call_done = nfs4_locku_done,
06f814a3 3895 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3896};
3897
a5d16a4d
TM		 3898static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3899 struct nfs_open_context *ctx,
3900 struct nfs4_lock_state *lsp,
3901 struct nfs_seqid *seqid)
3902{
3903 struct nfs4_unlockdata *data;
5138fde0
TM		 3904 struct rpc_message msg = {
3905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3906 .rpc_cred = ctx->cred,
3907 };
c970aa85
TM		 3908 struct rpc_task_setup task_setup_data = {
3909 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3910 .rpc_message = &msg,
c970aa85 3911 .callback_ops = &nfs4_locku_ops,
101070ca 3912 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3913 .flags = RPC_TASK_ASYNC,
3914 };
a5d16a4d 3915
137d6aca
FF		 3916 /* Ensure this is an unlock - when canceling a lock, the
3917 * canceled lock is passed in, and it won't be an unlock.
3918 */
3919 fl->fl_type = F_UNLCK;
3920
a5d16a4d
TM		 3921 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3922 if (data == NULL) {
3923 nfs_free_seqid(seqid);
3924 return ERR_PTR(-ENOMEM);
3925 }
3926
5138fde0
TM		 3927 msg.rpc_argp = &data->arg,
3928 msg.rpc_resp = &data->res,
c970aa85
TM		 3929 task_setup_data.callback_data = data;
3930 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3931}
3932
faf5f49c
TM		 3933static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3934{
19e03c57 3935 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3936 struct nfs_seqid *seqid;
1da177e4 3937 struct nfs4_lock_state *lsp;
06f814a3
TM		 3938 struct rpc_task *task;
3939 int status = 0;
536ff0f8 3940 unsigned char fl_flags = request->fl_flags;
faf5f49c 3941
8d0a8a9d 3942 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3943 /* Unlock _before_ we do the RPC call */
3944 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3945 down_read(&nfsi->rwsem);
3946 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3947 up_read(&nfsi->rwsem);
9b073574 3948 goto out;
19e03c57
TM		 3949 }
3950 up_read(&nfsi->rwsem);
8d0a8a9d 3951 if (status != 0)
9b073574
TM		 3952 goto out;
3953 /* Is this a delegated lock? */
3954 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3955 goto out;
8d0a8a9d 3956 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 3957 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 3958 status = -ENOMEM;
911d1aaf 3959 if (seqid == NULL)
9b073574 3960 goto out;
cd3758e3 3961 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3962 status = PTR_ERR(task);
3963 if (IS_ERR(task))
9b073574 3964 goto out;
a5d16a4d 3965 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3966 rpc_put_task(task);
9b073574 3967out:
536ff0f8 3968 request->fl_flags = fl_flags;
1da177e4
LT		 3969 return status;
3970}
3971
a5d16a4d
TM		 3972struct nfs4_lockdata {
3973 struct nfs_lock_args arg;
3974 struct nfs_lock_res res;
3975 struct nfs4_lock_state *lsp;
3976 struct nfs_open_context *ctx;
3977 struct file_lock fl;
26e976a8 3978 unsigned long timestamp;
a5d16a4d
TM		 3979 int rpc_status;
3980 int cancelled;
66179efe 3981 struct nfs_server *server;
a5d16a4d
TM		 3982};
3983
3984static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 3985 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
3986 gfp_t gfp_mask)
1da177e4 3987{
a5d16a4d
TM		 3988 struct nfs4_lockdata *p;
3989 struct inode *inode = lsp->ls_state->inode;
1da177e4 3990 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 3991
8535b2be 3992 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 3993 if (p == NULL)
3994 return NULL;
3995
3996 p->arg.fh = NFS_FH(inode);
3997 p->arg.fl = &p->fl;
8535b2be 3998 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 3999 if (p->arg.open_seqid == NULL)
4000 goto out_free;
8535b2be 4001 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4002 if (p->arg.lock_seqid == NULL)
2f74c0a0 4003 goto out_free_seqid;
a5d16a4d 4004 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4005 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4006 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 4007 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 4008 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 4009 p->lsp = lsp;
66179efe 4010 p->server = server;
a5d16a4d
TM		 4011 atomic_inc(&lsp->ls_count);
4012 p->ctx = get_nfs_open_context(ctx);
4013 memcpy(&p->fl, fl, sizeof(p->fl));
4014 return p;
2f74c0a0
TM		 4015out_free_seqid:
4016 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4017out_free:
4018 kfree(p);
4019 return NULL;
4020}
4021
4022static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4023{
4024 struct nfs4_lockdata *data = calldata;
4025 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4026
3110ff80 4027 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4028 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4029 return;
a5d16a4d
TM		 4030 /* Do we need to do an open_to_lock_owner? */
4031 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4032 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4033 return;
a5d16a4d
TM		 4034 data->arg.open_stateid = &state->stateid;
4035 data->arg.new_lock_owner = 1;
c1d51931 4036 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4037 } else
4038 data->arg.new_lock_owner = 0;
26e976a8 4039 data->timestamp = jiffies;
035168ab
TM		 4040 if (nfs4_setup_sequence(data->server,
4041 &data->arg.seq_args,
66179efe
AA		 4042 &data->res.seq_res, 1, task))
4043 return;
5138fde0 4044 rpc_call_start(task);
3110ff80 4045 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4046}
4047
b257957e
AB		 4048static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4049{
4050 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4051 nfs4_lock_prepare(task, calldata);
4052}
4053
a5d16a4d
TM		 4054static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4055{
4056 struct nfs4_lockdata *data = calldata;
4057
3110ff80 4058 dprintk("%s: begin!\n", __func__);
a5d16a4d 4059
14516c3a
TM		 4060 if (!nfs4_sequence_done(task, &data->res.seq_res))
4061 return;
66179efe 4062
a5d16a4d 4063 data->rpc_status = task->tk_status;
a5d16a4d 4064 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4065 if (data->rpc_status == 0)
4066 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4067 else
4068 goto out;
4069 }
4070 if (data->rpc_status == 0) {
4071 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4072 sizeof(data->lsp->ls_stateid.data));
4073 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4074 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4075 }
a5d16a4d 4076out:
3110ff80 4077 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4078}
4079
4080static void nfs4_lock_release(void *calldata)
4081{
4082 struct nfs4_lockdata *data = calldata;
4083
3110ff80 4084 dprintk("%s: begin!\n", __func__);
2f74c0a0 4085 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4086 if (data->cancelled != 0) {
4087 struct rpc_task *task;
4088 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4089 data->arg.lock_seqid);
4090 if (!IS_ERR(task))
e6b3c4db 4091 rpc_put_task(task);
3110ff80 4092 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4093 } else
4094 nfs_free_seqid(data->arg.lock_seqid);
4095 nfs4_put_lock_state(data->lsp);
4096 put_nfs_open_context(data->ctx);
4097 kfree(data);
3110ff80 4098 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4099}
4100
4101static const struct rpc_call_ops nfs4_lock_ops = {
4102 .rpc_call_prepare = nfs4_lock_prepare,
4103 .rpc_call_done = nfs4_lock_done,
4104 .rpc_release = nfs4_lock_release,
4105};
4106
b257957e
AB		 4107static const struct rpc_call_ops nfs4_recover_lock_ops = {
4108 .rpc_call_prepare = nfs4_recover_lock_prepare,
4109 .rpc_call_done = nfs4_lock_done,
4110 .rpc_release = nfs4_lock_release,
4111};
4112
2bee72a6
TM		 4113static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4114{
4115 struct nfs_client *clp = server->nfs_client;
4116 struct nfs4_state *state = lsp->ls_state;
4117
4118 switch (error) {
4119 case -NFS4ERR_ADMIN_REVOKED:
4120 case -NFS4ERR_BAD_STATEID:
4121 case -NFS4ERR_EXPIRED:
4122 if (new_lock_owner != 0 ||
4123 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4124 nfs4_state_mark_reclaim_nograce(clp, state);
4125 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4126 break;
4127 case -NFS4ERR_STALE_STATEID:
4128 if (new_lock_owner != 0 ||
4129 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4130 nfs4_state_mark_reclaim_reboot(clp, state);
4131 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4132 };
4133}
4134
afe6c27c 4135static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4136{
4137 struct nfs4_lockdata *data;
4138 struct rpc_task *task;
5138fde0
TM		 4139 struct rpc_message msg = {
4140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4141 .rpc_cred = state->owner->so_cred,
4142 };
c970aa85
TM		 4143 struct rpc_task_setup task_setup_data = {
4144 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4145 .rpc_message = &msg,
c970aa85 4146 .callback_ops = &nfs4_lock_ops,
101070ca 4147 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4148 .flags = RPC_TASK_ASYNC,
4149 };
a5d16a4d
TM		 4150 int ret;
4151
3110ff80 4152 dprintk("%s: begin!\n", __func__);
cd3758e3 4153 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4154 fl->fl_u.nfs4_fl.owner,
4155 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4156 if (data == NULL)
4157 return -ENOMEM;
4158 if (IS_SETLKW(cmd))
4159 data->arg.block = 1;
b257957e
AB		 4160 if (recovery_type > NFS_LOCK_NEW) {
4161 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4162 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4163 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4164 }
5138fde0
TM		 4165 msg.rpc_argp = &data->arg,
4166 msg.rpc_resp = &data->res,
c970aa85
TM		 4167 task_setup_data.callback_data = data;
4168 task = rpc_run_task(&task_setup_data);
7a1218a2 4169 if (IS_ERR(task))
a5d16a4d 4170 return PTR_ERR(task);
a5d16a4d
TM		 4171 ret = nfs4_wait_for_completion_rpc_task(task);
4172 if (ret == 0) {
4173 ret = data->rpc_status;
2bee72a6
TM		 4174 if (ret)
4175 nfs4_handle_setlk_error(data->server, data->lsp,
4176 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4177 } else
4178 data->cancelled = 1;
e6b3c4db 4179 rpc_put_task(task);
3110ff80 4180 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4181 return ret;
1da177e4
LT		 4182}
4183
4184static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4185{
202b50dc
TM		 4186 struct nfs_server *server = NFS_SERVER(state->inode);
4187 struct nfs4_exception exception = { };
4188 int err;
4189
4190 do {
42a2d13e
TM		 4191 /* Cache the lock if possible... */
4192 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4193 return 0;
afe6c27c 4194 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4195 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4196 break;
4197 nfs4_handle_exception(server, err, &exception);
4198 } while (exception.retry);
4199 return err;
1da177e4
LT		 4200}
4201
4202static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4203{
202b50dc
TM		 4204 struct nfs_server *server = NFS_SERVER(state->inode);
4205 struct nfs4_exception exception = { };
4206 int err;
4207
6bfc93ef
TM		 4208 err = nfs4_set_lock_state(state, request);
4209 if (err != 0)
4210 return err;
202b50dc 4211 do {
42a2d13e
TM		 4212 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4213 return 0;
afe6c27c 4214 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4215 switch (err) {
4216 default:
4217 goto out;
4218 case -NFS4ERR_GRACE:
4219 case -NFS4ERR_DELAY:
2c643488 4220 case -EKEYEXPIRED:
a9ed2e25
TM		 4221 nfs4_handle_exception(server, err, &exception);
4222 err = 0;
4223 }
202b50dc 4224 } while (exception.retry);
a9ed2e25 4225out:
202b50dc 4226 return err;
1da177e4
LT		 4227}
4228
4229static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4230{
19e03c57 4231 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4232 unsigned char fl_flags = request->fl_flags;
8e469ebd 4233 int status = -ENOLCK;
1da177e4 4234
8e469ebd
TM		 4235 if ((fl_flags & FL_POSIX) &&
4236 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4237 goto out;
6bfc93ef 4238 /* Is this a delegated open? */
6bfc93ef
TM		 4239 status = nfs4_set_lock_state(state, request);
4240 if (status != 0)
4241 goto out;
01c3b861
TM		 4242 request->fl_flags |= FL_ACCESS;
4243 status = do_vfs_lock(request->fl_file, request);
4244 if (status < 0)
4245 goto out;
19e03c57 4246 down_read(&nfsi->rwsem);
01c3b861 4247 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4248 /* Yes: cache locks! */
01c3b861 4249 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4250 request->fl_flags = fl_flags & ~FL_SLEEP;
4251 status = do_vfs_lock(request->fl_file, request);
4252 goto out_unlock;
01c3b861 4253 }
afe6c27c 4254 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4255 if (status != 0)
01c3b861 4256 goto out_unlock;
6bfc93ef 4257 /* Note: we always want to sleep here! */
01c3b861 4258 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4259 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4260 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4261out_unlock:
19e03c57 4262 up_read(&nfsi->rwsem);
01c3b861
TM		 4263out:
4264 request->fl_flags = fl_flags;
1da177e4
LT		 4265 return status;
4266}
4267
4268static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4269{
4270 struct nfs4_exception exception = { };
4271 int err;
4272
4273 do {
965b5d67
TM		 4274 err = _nfs4_proc_setlk(state, cmd, request);
4275 if (err == -NFS4ERR_DENIED)
4276 err = -EAGAIN;
1da177e4 4277 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4278 err, &exception);
1da177e4
LT		 4279 } while (exception.retry);
4280 return err;
4281}
4282
4283static int
4284nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4285{
4286 struct nfs_open_context *ctx;
4287 struct nfs4_state *state;
4288 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4289 int status;
4290
4291 /* verify open state */
cd3758e3 4292 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4293 state = ctx->state;
4294
4295 if (request->fl_start < 0 || request->fl_end < 0)
4296 return -EINVAL;
4297
d953126a
TM		 4298 if (IS_GETLK(cmd)) {
4299 if (state != NULL)
4300 return nfs4_proc_getlk(state, F_GETLK, request);
4301 return 0;
4302 }
1da177e4
LT		 4303
4304 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4305 return -EINVAL;
4306
d953126a
TM		 4307 if (request->fl_type == F_UNLCK) {
4308 if (state != NULL)
4309 return nfs4_proc_unlck(state, cmd, request);
4310 return 0;
4311 }
1da177e4 4312
d953126a
TM		 4313 if (state == NULL)
4314 return -ENOLCK;
1da177e4
LT		 4315 do {
4316 status = nfs4_proc_setlk(state, cmd, request);
4317 if ((status != -EAGAIN) || IS_SETLK(cmd))
4318 break;
4319 timeout = nfs4_set_lock_task_retry(timeout);
4320 status = -ERESTARTSYS;
4321 if (signalled())
4322 break;
4323 } while(status < 0);
1da177e4
LT		 4324 return status;
4325}
4326
888e694c
TM		 4327int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4328{
4329 struct nfs_server *server = NFS_SERVER(state->inode);
4330 struct nfs4_exception exception = { };
4331 int err;
4332
4333 err = nfs4_set_lock_state(state, fl);
4334 if (err != 0)
4335 goto out;
4336 do {
afe6c27c 4337 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4338 switch (err) {
4339 default:
4340 printk(KERN_ERR "%s: unhandled error %d.\n",
4341 __func__, err);
4342 case 0:
965b5d67 4343 case -ESTALE:
d5122201
TM		 4344 goto out;
4345 case -NFS4ERR_EXPIRED:
4346 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4347 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4348 case -NFS4ERR_BADSESSION:
4349 case -NFS4ERR_BADSLOT:
4350 case -NFS4ERR_BAD_HIGH_SLOT:
4351 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4352 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4353 nfs4_schedule_state_recovery(server->nfs_client);
4354 goto out;
965b5d67
TM		 4355 case -ERESTARTSYS:
4356 /*
4357 * The show must go on: exit, but mark the
4358 * stateid as needing recovery.
4359 */
4360 case -NFS4ERR_ADMIN_REVOKED:
4361 case -NFS4ERR_BAD_STATEID:
4362 case -NFS4ERR_OPENMODE:
4363 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4364 err = 0;
4365 goto out;
4366 case -ENOMEM:
4367 case -NFS4ERR_DENIED:
4368 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4369 err = 0;
4370 goto out;
d5122201 4371 case -NFS4ERR_DELAY:
2c643488 4372 case -EKEYEXPIRED:
d5122201
TM		 4373 break;
4374 }
888e694c
TM		 4375 err = nfs4_handle_exception(server, err, &exception);
4376 } while (exception.retry);
4377out:
4378 return err;
4379}
6b3b5496 4380
d3c7b7cc
TM		 4381static void nfs4_release_lockowner_release(void *calldata)
4382{
4383 kfree(calldata);
4384}
4385
4386const struct rpc_call_ops nfs4_release_lockowner_ops = {
4387 .rpc_release = nfs4_release_lockowner_release,
4388};
4389
4390void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4391{
4392 struct nfs_server *server = lsp->ls_state->owner->so_server;
4393 struct nfs_release_lockowner_args *args;
4394 struct rpc_message msg = {
4395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4396 };
4397
4398 if (server->nfs_client->cl_mvops->minor_version != 0)
4399 return;
4400 args = kmalloc(sizeof(*args), GFP_NOFS);
4401 if (!args)
4402 return;
4403 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4404 args->lock_owner.id = lsp->ls_id.id;
4405 msg.rpc_argp = args;
4406 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4407}
4408
aa1870af
BF		 4409#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4410
6b3b5496
BF		 4411int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4412 size_t buflen, int flags)
4413{
4b580ee3
BF		 4414 struct inode *inode = dentry->d_inode;
4415
4416 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4417 return -EOPNOTSUPP;
4418
4b580ee3 4419 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4420}
4421
4422/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4423 * and that's what we'll do for e.g. user attributes that haven't been set.
4424 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4425 * attributes in kernel-managed attribute namespaces. */
4426ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4427 size_t buflen)
4428{
aa1870af
BF		 4429 struct inode *inode = dentry->d_inode;
4430
4431 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4432 return -EOPNOTSUPP;
4433
4434 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4435}
4436
4437ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4438{
aa1870af 4439 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4440
096455a2
BF		 4441 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4442 return 0;
6b3b5496
BF		 4443 if (buf && buflen < len)
4444 return -ERANGE;
4445 if (buf)
aa1870af
BF		 4446 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4447 return len;
6b3b5496
BF		 4448}
4449
69aaaae1
TM		 4450static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4451{
4452 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4453 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4454 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4455 return;
4456
4457 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4458 NFS_ATTR_FATTR_NLINK;
4459 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4460 fattr->nlink = 2;
4461}
4462
56659e99 4463int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4464 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4465{
4466 struct nfs_server *server = NFS_SERVER(dir);
4467 u32 bitmask[2] = {
361e624f
MN		 4468 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4469 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4470 };
4471 struct nfs4_fs_locations_arg args = {
4472 .dir_fh = NFS_FH(dir),
c228fd3a 4473 .name = name,
683b57b4
TM		 4474 .page = page,
4475 .bitmask = bitmask,
4476 };
22958463
BH		 4477 struct nfs4_fs_locations_res res = {
4478 .fs_locations = fs_locations,
4479 };
683b57b4
TM		 4480 struct rpc_message msg = {
4481 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4482 .rpc_argp = &args,
22958463 4483 .rpc_resp = &res,
683b57b4
TM		 4484 };
4485 int status;
4486
3110ff80 4487 dprintk("%s: start\n", __func__);
c228fd3a 4488 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4489 fs_locations->server = server;
830b8e33 4490 fs_locations->nlocations = 0;
cccef3b9 4491 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4492 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4493 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4494 return status;
4495}
4496
557134a3 4497#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4498/*
4499 * nfs4_proc_exchange_id()
4500 *
4501 * Since the clientid has expired, all compounds using sessions
4502 * associated with the stale clientid will be returning
4503 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4504 * be in some phase of session reset.
4505 */
4d643d1d 4506int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4507{
4508 nfs4_verifier verifier;
4509 struct nfs41_exchange_id_args args = {
4510 .client = clp,
4511 .flags = clp->cl_exchange_flags,
4512 };
4513 struct nfs41_exchange_id_res res = {
4514 .client = clp,
4515 };
4516 int status;
4517 struct rpc_message msg = {
4518 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4519 .rpc_argp = &args,
4520 .rpc_resp = &res,
4521 .rpc_cred = cred,
4522 };
4523 __be32 *p;
4524
4525 dprintk("--> %s\n", __func__);
4526 BUG_ON(clp == NULL);
a7b72103 4527
7b183d0d
AB		 4528 /* Remove server-only flags */
4529 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4530
99fe60d0
BH		 4531 p = (u32 *)verifier.data;
4532 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4533 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4534 args.verifier = &verifier;
4535
4536 while (1) {
4537 args.id_len = scnprintf(args.id, sizeof(args.id),
4538 "%s/%s %u",
4539 clp->cl_ipaddr,
4540 rpc_peeraddr2str(clp->cl_rpcclient,
4541 RPC_DISPLAY_ADDR),
4542 clp->cl_id_uniquifier);
4543
4544 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4545
180b62a3 4546 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4547 break;
4548
4549 if (signalled())
4550 break;
4551
4552 if (++clp->cl_id_uniquifier == 0)
4553 break;
4554 }
4555
4556 dprintk("<-- %s status= %d\n", __func__, status);
4557 return status;
4558}
4559
2050f0cc
AA		 4560struct nfs4_get_lease_time_data {
4561 struct nfs4_get_lease_time_args *args;
4562 struct nfs4_get_lease_time_res *res;
4563 struct nfs_client *clp;
4564};
4565
4566static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4567 void *calldata)
4568{
4569 int ret;
4570 struct nfs4_get_lease_time_data *data =
4571 (struct nfs4_get_lease_time_data *)calldata;
4572
4573 dprintk("--> %s\n", __func__);
689cf5c1 4574 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4575 /* just setup sequence, do not trigger session recovery
4576 since we're invoked within one */
4577 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4578 &data->args->la_seq_args,
4579 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4580
4581 BUG_ON(ret == -EAGAIN);
4582 rpc_call_start(task);
4583 dprintk("<-- %s\n", __func__);
4584}
4585
4586/*
4587 * Called from nfs4_state_manager thread for session setup, so don't recover
4588 * from sequence operation or clientid errors.
4589 */
4590static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4591{
4592 struct nfs4_get_lease_time_data *data =
4593 (struct nfs4_get_lease_time_data *)calldata;
4594
4595 dprintk("--> %s\n", __func__);
14516c3a
TM		 4596 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4597 return;
2050f0cc
AA		 4598 switch (task->tk_status) {
4599 case -NFS4ERR_DELAY:
4600 case -NFS4ERR_GRACE:
2c643488 4601 case -EKEYEXPIRED:
2050f0cc
AA		 4602 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4603 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4604 task->tk_status = 0;
0110ee15 4605 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4606 return;
4607 }
2050f0cc
AA		 4608 dprintk("<-- %s\n", __func__);
4609}
4610
4611struct rpc_call_ops nfs4_get_lease_time_ops = {
4612 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4613 .rpc_call_done = nfs4_get_lease_time_done,
4614};
4615
4616int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4617{
4618 struct rpc_task *task;
4619 struct nfs4_get_lease_time_args args;
4620 struct nfs4_get_lease_time_res res = {
4621 .lr_fsinfo = fsinfo,
4622 };
4623 struct nfs4_get_lease_time_data data = {
4624 .args = &args,
4625 .res = &res,
4626 .clp = clp,
4627 };
4628 struct rpc_message msg = {
4629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4630 .rpc_argp = &args,
4631 .rpc_resp = &res,
4632 };
4633 struct rpc_task_setup task_setup = {
4634 .rpc_client = clp->cl_rpcclient,
4635 .rpc_message = &msg,
4636 .callback_ops = &nfs4_get_lease_time_ops,
4637 .callback_data = &data
4638 };
4639 int status;
4640
4641 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4642 dprintk("--> %s\n", __func__);
4643 task = rpc_run_task(&task_setup);
4644
4645 if (IS_ERR(task))
4646 status = PTR_ERR(task);
4647 else {
4648 status = task->tk_status;
4649 rpc_put_task(task);
4650 }
4651 dprintk("<-- %s return %d\n", __func__, status);
4652
4653 return status;
4654}
4655
b73dafa7
RL		 4656/*
4657 * Reset a slot table
4658 */
104aeba4
AA		 4659static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4660 int ivalue)
ac72b7b3 4661{
104aeba4 4662 struct nfs4_slot *new = NULL;
b73dafa7 4663 int i;
ac72b7b3
AA		 4664 int ret = 0;
4665
104aeba4
AA		 4666 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4667 max_reqs, tbl->max_slots);
ac72b7b3 4668
104aeba4
AA		 4669 /* Does the newly negotiated max_reqs match the existing slot table? */
4670 if (max_reqs != tbl->max_slots) {
4671 ret = -ENOMEM;
4672 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4673 GFP_NOFS);
104aeba4
AA		 4674 if (!new)
4675 goto out;
4676 ret = 0;
4677 kfree(tbl->slots);
ac72b7b3
AA		 4678 }
4679 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4680 if (new) {
4681 tbl->slots = new;
4682 tbl->max_slots = max_reqs;
4683 }
4684 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4685 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4686 spin_unlock(&tbl->slot_tbl_lock);
4687 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4688 tbl, tbl->slots, tbl->max_slots);
4689out:
4690 dprintk("<-- %s: return %d\n", __func__, ret);
4691 return ret;
4692}
4693
b73dafa7
RL		 4694/*
4695 * Reset the forechannel and backchannel slot tables
4696 */
4697static int nfs4_reset_slot_tables(struct nfs4_session *session)
4698{
4699 int status;
4700
4701 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4702 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4703 if (status)
4704 return status;
4705
4706 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4707 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4708 return status;
4709}
4710
f8625a6a
RL		 4711/* Destroy the slot table */
4712static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4713{
4714 if (session->fc_slot_table.slots != NULL) {
4715 kfree(session->fc_slot_table.slots);
4716 session->fc_slot_table.slots = NULL;
4717 }
4718 if (session->bc_slot_table.slots != NULL) {
4719 kfree(session->bc_slot_table.slots);
4720 session->bc_slot_table.slots = NULL;
4721 }
4722 return;
4723}
4724
fc931582
AA		 4725/*
4726 * Initialize slot table
4727 */
050047ce
RL		 4728static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4729 int max_slots, int ivalue)
fc931582 4730{
fc931582
AA		 4731 struct nfs4_slot *slot;
4732 int ret = -ENOMEM;
4733
4734 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4735
050047ce 4736 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4737
8535b2be 4738 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4739 if (!slot)
4740 goto out;
fc931582
AA		 4741 ret = 0;
4742
4743 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4744 tbl->max_slots = max_slots;
4745 tbl->slots = slot;
4746 tbl->highest_used_slotid = -1; /* no slot is currently used */
4747 spin_unlock(&tbl->slot_tbl_lock);
4748 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4749 tbl, tbl->slots, tbl->max_slots);
4750out:
4751 dprintk("<-- %s: return %d\n", __func__, ret);
4752 return ret;
fc931582
AA		 4753}
4754
050047ce
RL		 4755/*
4756 * Initialize the forechannel and backchannel tables
4757 */
4758static int nfs4_init_slot_tables(struct nfs4_session *session)
4759{
f26468fb
TM		 4760 struct nfs4_slot_table *tbl;
4761 int status = 0;
050047ce 4762
f26468fb
TM		 4763 tbl = &session->fc_slot_table;
4764 if (tbl->slots == NULL) {
4765 status = nfs4_init_slot_table(tbl,
4766 session->fc_attrs.max_reqs, 1);
4767 if (status)
4768 return status;
4769 }
050047ce 4770
f26468fb
TM		 4771 tbl = &session->bc_slot_table;
4772 if (tbl->slots == NULL) {
4773 status = nfs4_init_slot_table(tbl,
4774 session->bc_attrs.max_reqs, 0);
4775 if (status)
4776 nfs4_destroy_slot_tables(session);
4777 }
f8625a6a
RL		 4778
4779 return status;
557134a3
AA		 4780}
4781
4782struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4783{
4784 struct nfs4_session *session;
4785 struct nfs4_slot_table *tbl;
4786
8535b2be 4787 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4788 if (!session)
4789 return NULL;
76db6d95 4790
ea028ac9 4791 init_completion(&session->complete);
76db6d95 4792
557134a3 4793 tbl = &session->fc_slot_table;
9dfdf404 4794 tbl->highest_used_slotid = -1;
557134a3 4795 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4796 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4797
4798 tbl = &session->bc_slot_table;
9dfdf404 4799 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4800 spin_lock_init(&tbl->slot_tbl_lock);
4801 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4802
1055d76d
TM		 4803 session->session_state = 1<<NFS4_SESSION_INITING;
4804
557134a3
AA		 4805 session->clp = clp;
4806 return session;
4807}
4808
4809void nfs4_destroy_session(struct nfs4_session *session)
4810{
5a0ffe54
AA		 4811 nfs4_proc_destroy_session(session);
4812 dprintk("%s Destroy backchannel for xprt %p\n",
4813 __func__, session->clp->cl_rpcclient->cl_xprt);
4814 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4815 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4816 nfs4_destroy_slot_tables(session);
557134a3
AA		 4817 kfree(session);
4818}
4819
fc931582
AA		 4820/*
4821 * Initialize the values to be used by the client in CREATE_SESSION
4822 * If nfs4_init_session set the fore channel request and response sizes,
4823 * use them.
4824 *
4825 * Set the back channel max_resp_sz_cached to zero to force the client to
4826 * always set csa_cachethis to FALSE because the current implementation
4827 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4828 */
4829static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4830{
4831 struct nfs4_session *session = args->client->cl_session;
4832 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4833 mxresp_sz = session->fc_attrs.max_resp_sz;
4834
4835 if (mxrqst_sz == 0)
4836 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4837 if (mxresp_sz == 0)
4838 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4839 /* Fore channel attributes */
4840 args->fc_attrs.headerpadsz = 0;
4841 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4842 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4843 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4844 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4845
4846 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4847 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4848 __func__,
4849 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4850 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4851
4852 /* Back channel attributes */
4853 args->bc_attrs.headerpadsz = 0;
4854 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4855 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4856 args->bc_attrs.max_resp_sz_cached = 0;
4857 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4858 args->bc_attrs.max_reqs = 1;
4859
4860 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4861 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4862 __func__,
4863 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4864 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4865 args->bc_attrs.max_reqs);
4866}
4867
8d35301d
AA		 4868static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4869{
4870 if (rcvd <= sent)
4871 return 0;
4872 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4873 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4874 return -EINVAL;
4875}
4876
4877#define _verify_fore_channel_attr(_name_) \
4878 _verify_channel_attr("fore", #_name_, \
4879 args->fc_attrs._name_, \
4880 session->fc_attrs._name_)
4881
4882#define _verify_back_channel_attr(_name_) \
4883 _verify_channel_attr("back", #_name_, \
4884 args->bc_attrs._name_, \
4885 session->bc_attrs._name_)
4886
4887/*
4888 * The server is not allowed to increase the fore channel header pad size,
4889 * maximum response size, or maximum number of operations.
4890 *
4891 * The back channel attributes are only negotiatied down: We send what the
4892 * (back channel) server insists upon.
4893 */
4894static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4895 struct nfs4_session *session)
4896{
4897 int ret = 0;
4898
4899 ret |= _verify_fore_channel_attr(headerpadsz);
4900 ret |= _verify_fore_channel_attr(max_resp_sz);
4901 ret |= _verify_fore_channel_attr(max_ops);
4902
4903 ret |= _verify_back_channel_attr(headerpadsz);
4904 ret |= _verify_back_channel_attr(max_rqst_sz);
4905 ret |= _verify_back_channel_attr(max_resp_sz);
4906 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4907 ret |= _verify_back_channel_attr(max_ops);
4908 ret |= _verify_back_channel_attr(max_reqs);
4909
4910 return ret;
4911}
4912
fc931582
AA		 4913static int _nfs4_proc_create_session(struct nfs_client *clp)
4914{
4915 struct nfs4_session *session = clp->cl_session;
4916 struct nfs41_create_session_args args = {
4917 .client = clp,
4918 .cb_program = NFS4_CALLBACK,
4919 };
4920 struct nfs41_create_session_res res = {
4921 .client = clp,
4922 };
4923 struct rpc_message msg = {
4924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4925 .rpc_argp = &args,
4926 .rpc_resp = &res,
4927 };
4928 int status;
4929
4930 nfs4_init_channel_attrs(&args);
0f91421e 4931 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4932
4933 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4934
8d35301d
AA		 4935 if (!status)
4936 /* Verify the session's negotiated channel_attrs values */
4937 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4938 if (!status) {
4939 /* Increment the clientid slot sequence id */
4940 clp->cl_seqid++;
4941 }
4942
4943 return status;
4944}
4945
4946/*
4947 * Issues a CREATE_SESSION operation to the server.
4948 * It is the responsibility of the caller to verify the session is
4949 * expired before calling this routine.
4950 */
f26468fb 4951int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4952{
4953 int status;
4954 unsigned *ptr;
fc931582
AA		 4955 struct nfs4_session *session = clp->cl_session;
4956
4957 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4958
4959 status = _nfs4_proc_create_session(clp);
4960 if (status)
4961 goto out;
4962
f26468fb
TM		 4963 /* Init and reset the fore channel */
4964 status = nfs4_init_slot_tables(session);
4965 dprintk("slot table initialization returned %d\n", status);
4966 if (status)
4967 goto out;
4968 status = nfs4_reset_slot_tables(session);
4969 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4970 if (status)
4971 goto out;
4972
4973 ptr = (unsigned *)&session->sess_id.data[0];
4974 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4975 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4976out:
4977 dprintk("<-- %s\n", __func__);
4978 return status;
4979}
4980
0f3e66c6
AA		 4981/*
4982 * Issue the over-the-wire RPC DESTROY_SESSION.
4983 * The caller must serialize access to this routine.
4984 */
4985int nfs4_proc_destroy_session(struct nfs4_session *session)
4986{
4987 int status = 0;
4988 struct rpc_message msg;
4989
4990 dprintk("--> nfs4_proc_destroy_session\n");
4991
4992 /* session is still being setup */
4993 if (session->clp->cl_cons_state != NFS_CS_READY)
4994 return status;
4995
4996 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4997 msg.rpc_argp = session;
4998 msg.rpc_resp = NULL;
4999 msg.rpc_cred = NULL;
5000 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5001
5002 if (status)
5003 printk(KERN_WARNING
5004 "Got error %d from the server on DESTROY_SESSION. "
5005 "Session has been destroyed regardless...\n", status);
5006
5007 dprintk("<-- nfs4_proc_destroy_session\n");
5008 return status;
5009}
5010
fccba804
TM		 5011int nfs4_init_session(struct nfs_server *server)
5012{
5013 struct nfs_client *clp = server->nfs_client;
2449ea2e 5014 struct nfs4_session *session;
68bf05ef 5015 unsigned int rsize, wsize;
fccba804
TM		 5016 int ret;
5017
5018 if (!nfs4_has_session(clp))
5019 return 0;
5020
1055d76d
TM		 5021 session = clp->cl_session;
5022 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5023 return 0;
5024
68bf05ef
AA		 5025 rsize = server->rsize;
5026 if (rsize == 0)
5027 rsize = NFS_MAX_FILE_IO_SIZE;
5028 wsize = server->wsize;
5029 if (wsize == 0)
5030 wsize = NFS_MAX_FILE_IO_SIZE;
5031
68bf05ef
AA		 5032 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5033 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5034
fccba804
TM		 5035 ret = nfs4_recover_expired_lease(server);
5036 if (!ret)
5037 ret = nfs4_check_client_ready(clp);
5038 return ret;
5039}
5040
fc01cea9
AA		 5041/*
5042 * Renew the cl_session lease.
5043 */
d5f8d3fe
TM		 5044struct nfs4_sequence_data {
5045 struct nfs_client *clp;
5046 struct nfs4_sequence_args args;
5047 struct nfs4_sequence_res res;
5048};
5049
dc96aef9
AB		 5050static void nfs41_sequence_release(void *data)
5051{
d5f8d3fe
TM		 5052 struct nfs4_sequence_data *calldata = data;
5053 struct nfs_client *clp = calldata->clp;
dc96aef9 5054
7135840f
AB		 5055 if (atomic_read(&clp->cl_count) > 1)
5056 nfs4_schedule_state_renewal(clp);
5057 nfs_put_client(clp);
d5f8d3fe 5058 kfree(calldata);
dc96aef9
AB		 5059}
5060
aa5190d0
TM		 5061static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5062{
5063 switch(task->tk_status) {
5064 case -NFS4ERR_DELAY:
5065 case -EKEYEXPIRED:
5066 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5067 return -EAGAIN;
5068 default:
5069 nfs4_schedule_state_recovery(clp);
5070 }
5071 return 0;
5072}
5073
dc96aef9 5074static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5075{
d5f8d3fe
TM		 5076 struct nfs4_sequence_data *calldata = data;
5077 struct nfs_client *clp = calldata->clp;
fc01cea9 5078
14516c3a
TM		 5079 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5080 return;
fc01cea9
AA		 5081
5082 if (task->tk_status < 0) {
5083 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5084 if (atomic_read(&clp->cl_count) == 1)
5085 goto out;
fc01cea9 5086
aa5190d0
TM		 5087 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5088 rpc_restart_call_prepare(task);
fc01cea9
AA		 5089 return;
5090 }
5091 }
fc01cea9 5092 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5093out:
fc01cea9
AA		 5094 dprintk("<-- %s\n", __func__);
5095}
5096
5097static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5098{
d5f8d3fe
TM		 5099 struct nfs4_sequence_data *calldata = data;
5100 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5101 struct nfs4_sequence_args *args;
5102 struct nfs4_sequence_res *res;
5103
fc01cea9
AA		 5104 args = task->tk_msg.rpc_argp;
5105 res = task->tk_msg.rpc_resp;
5106
035168ab 5107 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5108 return;
5109 rpc_call_start(task);
5110}
5111
5112static const struct rpc_call_ops nfs41_sequence_ops = {
5113 .rpc_call_done = nfs41_sequence_call_done,
5114 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5115 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5116};
5117
71ac6da9 5118static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5119{
d5f8d3fe 5120 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5121 struct rpc_message msg = {
5122 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5123 .rpc_cred = cred,
5124 };
71ac6da9
TM		 5125 struct rpc_task_setup task_setup_data = {
5126 .rpc_client = clp->cl_rpcclient,
5127 .rpc_message = &msg,
5128 .callback_ops = &nfs41_sequence_ops,
5129 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5130 };
fc01cea9 5131
7135840f 5132 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5133 return ERR_PTR(-EIO);
d5f8d3fe
TM		 5134 calldata = kmalloc(sizeof(*calldata), GFP_NOFS);
5135 if (calldata == NULL) {
7135840f 5136 nfs_put_client(clp);
71ac6da9 5137 return ERR_PTR(-ENOMEM);
fc01cea9 5138 }
d5f8d3fe
TM		 5139 calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5140 msg.rpc_argp = &calldata->args;
5141 msg.rpc_resp = &calldata->res;
5142 calldata->clp = clp;
71ac6da9 5143 task_setup_data.callback_data = calldata;
fc01cea9 5144
71ac6da9
TM		 5145 return rpc_run_task(&task_setup_data);
5146}
5147
5148static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5149{
5150 struct rpc_task *task;
5151 int ret = 0;
5152
5153 task = _nfs41_proc_sequence(clp, cred);
5154 if (IS_ERR(task))
5155 ret = PTR_ERR(task);
5156 else
5157 rpc_put_task(task);
5158 dprintk("<-- %s status=%d\n", __func__, ret);
5159 return ret;
5160}
5161
5162static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5163{
5164 struct rpc_task *task;
5165 int ret;
5166
5167 task = _nfs41_proc_sequence(clp, cred);
5168 if (IS_ERR(task)) {
5169 ret = PTR_ERR(task);
5170 goto out;
5171 }
5172 ret = rpc_wait_for_completion_task(task);
5173 if (!ret)
5174 ret = task->tk_status;
5175 rpc_put_task(task);
5176out:
5177 dprintk("<-- %s status=%d\n", __func__, ret);
5178 return ret;
fc01cea9
AA		 5179}
5180
fce5c838
RL		 5181struct nfs4_reclaim_complete_data {
5182 struct nfs_client *clp;
5183 struct nfs41_reclaim_complete_args arg;
5184 struct nfs41_reclaim_complete_res res;
5185};
5186
5187static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5188{
5189 struct nfs4_reclaim_complete_data *calldata = data;
5190
b257957e 5191 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5192 if (nfs41_setup_sequence(calldata->clp->cl_session,
5193 &calldata->arg.seq_args,
fce5c838
RL		 5194 &calldata->res.seq_res, 0, task))
5195 return;
5196
5197 rpc_call_start(task);
5198}
5199
aa5190d0
TM		 5200static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5201{
5202 switch(task->tk_status) {
5203 case 0:
5204 case -NFS4ERR_COMPLETE_ALREADY:
5205 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5206 break;
5207 case -NFS4ERR_DELAY:
5208 case -EKEYEXPIRED:
5209 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5210 return -EAGAIN;
5211 default:
5212 nfs4_schedule_state_recovery(clp);
5213 }
5214 return 0;
5215}
5216
fce5c838
RL		 5217static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5218{
5219 struct nfs4_reclaim_complete_data *calldata = data;
5220 struct nfs_client *clp = calldata->clp;
5221 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5222
5223 dprintk("--> %s\n", __func__);
14516c3a
TM		 5224 if (!nfs41_sequence_done(task, res))
5225 return;
fce5c838 5226
aa5190d0
TM		 5227 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5228 rpc_restart_call_prepare(task);
5229 return;
5230 }
fce5c838
RL		 5231 dprintk("<-- %s\n", __func__);
5232}
5233
5234static void nfs4_free_reclaim_complete_data(void *data)
5235{
5236 struct nfs4_reclaim_complete_data *calldata = data;
5237
5238 kfree(calldata);
5239}
5240
5241static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5242 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5243 .rpc_call_done = nfs4_reclaim_complete_done,
5244 .rpc_release = nfs4_free_reclaim_complete_data,
5245};
5246
5247/*
5248 * Issue a global reclaim complete.
5249 */
5250static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5251{
5252 struct nfs4_reclaim_complete_data *calldata;
5253 struct rpc_task *task;
5254 struct rpc_message msg = {
5255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5256 };
5257 struct rpc_task_setup task_setup_data = {
5258 .rpc_client = clp->cl_rpcclient,
5259 .rpc_message = &msg,
5260 .callback_ops = &nfs4_reclaim_complete_call_ops,
5261 .flags = RPC_TASK_ASYNC,
5262 };
5263 int status = -ENOMEM;
5264
5265 dprintk("--> %s\n", __func__);
8535b2be 5266 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5267 if (calldata == NULL)
5268 goto out;
5269 calldata->clp = clp;
5270 calldata->arg.one_fs = 0;
5271 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5272
5273 msg.rpc_argp = &calldata->arg;
5274 msg.rpc_resp = &calldata->res;
5275 task_setup_data.callback_data = calldata;
5276 task = rpc_run_task(&task_setup_data);
acf82b85 5277 if (IS_ERR(task)) {
fce5c838 5278 status = PTR_ERR(task);
acf82b85
DC		 5279 goto out;
5280 }
fce5c838 5281 rpc_put_task(task);
acf82b85 5282 return 0;
fce5c838
RL		 5283out:
5284 dprintk("<-- %s status=%d\n", __func__, status);
5285 return status;
5286}
557134a3
AA		 5287#endif /* CONFIG_NFS_V4_1 */
5288
591d71cb 5289struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5290 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5291 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5292 .recover_open = nfs4_open_reclaim,
5293 .recover_lock = nfs4_lock_reclaim,
591d71cb 5294 .establish_clid = nfs4_init_clientid,
90a16617 5295 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5296};
5297
591d71cb
AA		 5298#if defined(CONFIG_NFS_V4_1)
5299struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5300 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5301 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5302 .recover_open = nfs4_open_reclaim,
5303 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5304 .establish_clid = nfs41_init_clientid,
b4b82607 5305 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5306 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5307};
5308#endif /* CONFIG_NFS_V4_1 */
5309
5310struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5311 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5312 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5313 .recover_open = nfs4_open_expired,
5314 .recover_lock = nfs4_lock_expired,
5315 .establish_clid = nfs4_init_clientid,
90a16617 5316 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5317};
5318
5319#if defined(CONFIG_NFS_V4_1)
5320struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5321 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5322 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5323 .recover_open = nfs4_open_expired,
5324 .recover_lock = nfs4_lock_expired,
4d643d1d 5325 .establish_clid = nfs41_init_clientid,
b4b82607 5326 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5327};
591d71cb 5328#endif /* CONFIG_NFS_V4_1 */
1da177e4 5329
29fba38b
BH		 5330struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5331 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5332 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5333 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5334};
5335
5336#if defined(CONFIG_NFS_V4_1)
5337struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5338 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5339 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5340 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5341};
5342#endif
5343
97dc1359
TM		 5344static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5345 .minor_version = 0,
5346 .call_sync = _nfs4_call_sync,
e047a10c 5347 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5348 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5349 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5350 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5351};
5352
5353#if defined(CONFIG_NFS_V4_1)
5354static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5355 .minor_version = 1,
5356 .call_sync = _nfs4_call_sync_session,
e047a10c 5357 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5358 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5359 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5360 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5361};
5362#endif
5363
97dc1359
TM		 5364const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5365 [0] = &nfs_v4_0_minor_ops,
5366#if defined(CONFIG_NFS_V4_1)
5367 [1] = &nfs_v4_1_minor_ops,
5368#endif
5369};
5370
92e1d5be 5371static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5372 .permission = nfs_permission,
5373 .getattr = nfs_getattr,
5374 .setattr = nfs_setattr,
5375 .getxattr = nfs4_getxattr,
5376 .setxattr = nfs4_setxattr,
5377 .listxattr = nfs4_listxattr,
5378};
5379
509de811 5380const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5381 .version = 4, /* protocol version */
5382 .dentry_ops = &nfs4_dentry_operations,
5383 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5384 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5385 .getroot = nfs4_proc_get_root,
5386 .getattr = nfs4_proc_getattr,
5387 .setattr = nfs4_proc_setattr,
2b3de441 5388 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5389 .lookup = nfs4_proc_lookup,
5390 .access = nfs4_proc_access,
5391 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5392 .create = nfs4_proc_create,
5393 .remove = nfs4_proc_remove,
5394 .unlink_setup = nfs4_proc_unlink_setup,
5395 .unlink_done = nfs4_proc_unlink_done,
5396 .rename = nfs4_proc_rename,
5397 .link = nfs4_proc_link,
5398 .symlink = nfs4_proc_symlink,
5399 .mkdir = nfs4_proc_mkdir,
5400 .rmdir = nfs4_proc_remove,
5401 .readdir = nfs4_proc_readdir,
5402 .mknod = nfs4_proc_mknod,
5403 .statfs = nfs4_proc_statfs,
5404 .fsinfo = nfs4_proc_fsinfo,
5405 .pathconf = nfs4_proc_pathconf,
e9326dca 5406 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5407 .decode_dirent = nfs4_decode_dirent,
5408 .read_setup = nfs4_proc_read_setup,
ec06c096 5409 .read_done = nfs4_read_done,
1da177e4 5410 .write_setup = nfs4_proc_write_setup,
788e7a89 5411 .write_done = nfs4_write_done,
1da177e4 5412 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5413 .commit_done = nfs4_commit_done,
1da177e4 5414 .lock = nfs4_proc_lock,
e50a1c2e 5415 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5416 .close_context = nfs4_close_context,
1da177e4
LT		 5417};
5418
5419/*
5420 * Local variables:
5421 * c-basic-offset: 8
5422 * End:
5423 */
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