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NFSv4: Clean up nfs4_atomic_open
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
5a0e3ad6 42#include <linux/slab.h>
1da177e4
LT		 43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
1da177e4 48#include <linux/namei.h>
02a913a7 49#include <linux/mount.h>
99fe60d0 50#include <linux/module.h>
5a0ffe54 51#include <linux/sunrpc/bc_xprt.h>
1da177e4 52
4ce79717 53#include "nfs4_fs.h"
1da177e4 54#include "delegation.h"
101070ca 55#include "internal.h"
006ea73e 56#include "iostat.h"
fc931582 57#include "callback.h"
1da177e4
LT		 58
59#define NFSDBG_FACILITY NFSDBG_PROC
60
2066fe89 61#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 62#define NFS4_POLL_RETRY_MAX (15*HZ)
63
a78cb57a
TM		 64#define NFS4_MAX_LOOP_ON_RECOVER (10)
65
cdd4e68b 66struct nfs4_opendata;
864472e9 67static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 68static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 69static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 70static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 71static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
72static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 73static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
74 struct nfs_fattr *fattr, struct iattr *sattr,
75 struct nfs4_state *state);
1da177e4 76
1da177e4 77/* Prevent leaks of NFSv4 errors into userland */
46f72f57 78static int nfs4_map_errors(int err)
1da177e4 79{
52567b03
TM		 80 if (err >= -1000)
81 return err;
82 switch (err) {
83 case -NFS4ERR_RESOURCE:
84 return -EREMOTEIO;
85 default:
1da177e4 86 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 87 __func__, -err);
52567b03 88 break;
1da177e4 89 }
52567b03 90 return -EIO;
1da177e4
LT		 91}
92
93/*
94 * This is our standard bitmap for GETATTR requests.
95 */
96const u32 nfs4_fattr_bitmap[2] = {
97 FATTR4_WORD0_TYPE
98 | FATTR4_WORD0_CHANGE
99 | FATTR4_WORD0_SIZE
100 | FATTR4_WORD0_FSID
101 | FATTR4_WORD0_FILEID,
102 FATTR4_WORD1_MODE
103 | FATTR4_WORD1_NUMLINKS
104 | FATTR4_WORD1_OWNER
105 | FATTR4_WORD1_OWNER_GROUP
106 | FATTR4_WORD1_RAWDEV
107 | FATTR4_WORD1_SPACE_USED
108 | FATTR4_WORD1_TIME_ACCESS
109 | FATTR4_WORD1_TIME_METADATA
110 | FATTR4_WORD1_TIME_MODIFY
111};
112
113const u32 nfs4_statfs_bitmap[2] = {
114 FATTR4_WORD0_FILES_AVAIL
115 | FATTR4_WORD0_FILES_FREE
116 | FATTR4_WORD0_FILES_TOTAL,
117 FATTR4_WORD1_SPACE_AVAIL
118 | FATTR4_WORD1_SPACE_FREE
119 | FATTR4_WORD1_SPACE_TOTAL
120};
121
4ce79717 122const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 123 FATTR4_WORD0_MAXLINK
124 | FATTR4_WORD0_MAXNAME,
125 0
126};
127
128const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
129 | FATTR4_WORD0_MAXREAD
130 | FATTR4_WORD0_MAXWRITE
131 | FATTR4_WORD0_LEASE_TIME,
132 0
133};
134
830b8e33
MN		 135const u32 nfs4_fs_locations_bitmap[2] = {
136 FATTR4_WORD0_TYPE
137 | FATTR4_WORD0_CHANGE
138 | FATTR4_WORD0_SIZE
139 | FATTR4_WORD0_FSID
140 | FATTR4_WORD0_FILEID
141 | FATTR4_WORD0_FS_LOCATIONS,
142 FATTR4_WORD1_MODE
143 | FATTR4_WORD1_NUMLINKS
144 | FATTR4_WORD1_OWNER
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY
151 | FATTR4_WORD1_MOUNTED_ON_FILEID
152};
153
bc4785cd 154static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 155 struct nfs4_readdir_arg *readdir)
156{
0dbb4c67 157 __be32 *start, *p;
1da177e4
LT		 158
159 BUG_ON(readdir->count < 80);
160 if (cookie > 2) {
b7ef1956 161 readdir->cookie = cookie;
1da177e4
LT		 162 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
163 return;
164 }
165
166 readdir->cookie = 0;
167 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
168 if (cookie == 2)
169 return;
170
171 /*
172 * NFSv4 servers do not return entries for '.' and '..'
173 * Therefore, we fake these entries here. We let '.'
174 * have cookie 0 and '..' have cookie 1. Note that
175 * when talking to the server, we always send cookie 0
176 * instead of 1 or 2.
177 */
0dbb4c67 178 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 179
180 if (cookie == 0) {
181 *p++ = xdr_one; /* next */
182 *p++ = xdr_zero; /* cookie, first word */
183 *p++ = xdr_one; /* cookie, second word */
184 *p++ = xdr_one; /* entry len */
185 memcpy(p, ".\0\0\0", 4); /* entry */
186 p++;
187 *p++ = xdr_one; /* bitmap length */
188 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
189 *p++ = htonl(8); /* attribute buffer length */
4e769b93 190 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 191 }
192
193 *p++ = xdr_one; /* next */
194 *p++ = xdr_zero; /* cookie, first word */
195 *p++ = xdr_two; /* cookie, second word */
196 *p++ = xdr_two; /* entry len */
197 memcpy(p, "..\0\0", 4); /* entry */
198 p++;
199 *p++ = xdr_one; /* bitmap length */
200 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
201 *p++ = htonl(8); /* attribute buffer length */
4e769b93 202 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 203
204 readdir->pgbase = (char *)p - (char *)start;
205 readdir->count -= readdir->pgbase;
206 kunmap_atomic(start, KM_USER0);
207}
208
65de872e
TM		 209static int nfs4_wait_clnt_recover(struct nfs_client *clp)
210{
211 int res;
212
213 might_sleep();
214
e005e804 215 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 216 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 217 return res;
218}
219
220static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
221{
222 int res = 0;
223
224 might_sleep();
225
226 if (*timeout <= 0)
227 *timeout = NFS4_POLL_RETRY_MIN;
228 if (*timeout > NFS4_POLL_RETRY_MAX)
229 *timeout = NFS4_POLL_RETRY_MAX;
230 schedule_timeout_killable(*timeout);
231 if (fatal_signal_pending(current))
232 res = -ERESTARTSYS;
233 *timeout <<= 1;
234 return res;
235}
236
237/* This is the error handling routine for processes that are allowed
238 * to sleep.
239 */
240static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
241{
242 struct nfs_client *clp = server->nfs_client;
9e33bed5 243 struct nfs4_state *state = exception->state;
65de872e
TM		 244 int ret = errorcode;
245
246 exception->retry = 0;
247 switch(errorcode) {
248 case 0:
249 return 0;
9e33bed5
TM		 250 case -NFS4ERR_ADMIN_REVOKED:
251 case -NFS4ERR_BAD_STATEID:
252 case -NFS4ERR_OPENMODE:
253 if (state == NULL)
254 break;
255 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 256 goto do_state_recovery;
65de872e 257 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 258 if (state == NULL)
259 break;
260 nfs4_state_mark_reclaim_reboot(clp, state);
261 case -NFS4ERR_STALE_CLIENTID:
65de872e 262 case -NFS4ERR_EXPIRED:
a2c0b9e2 263 goto do_state_recovery;
03391693 264#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 265 case -NFS4ERR_BADSESSION:
266 case -NFS4ERR_BADSLOT:
267 case -NFS4ERR_BAD_HIGH_SLOT:
268 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
269 case -NFS4ERR_DEADSESSION:
270 case -NFS4ERR_SEQ_FALSE_RETRY:
271 case -NFS4ERR_SEQ_MISORDERED:
272 dprintk("%s ERROR: %d Reset session\n", __func__,
273 errorcode);
0b9e2d41 274 nfs4_schedule_state_recovery(clp);
4745e315 275 exception->retry = 1;
b9179237 276 break;
03391693 277#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 278 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 279 if (exception->timeout > HZ) {
280 /* We have retried a decent amount, time to
281 * fail
282 */
283 ret = -EBUSY;
284 break;
285 }
65de872e
TM		 286 case -NFS4ERR_GRACE:
287 case -NFS4ERR_DELAY:
2c643488 288 case -EKEYEXPIRED:
65de872e
TM		 289 ret = nfs4_delay(server->client, &exception->timeout);
290 if (ret != 0)
291 break;
292 case -NFS4ERR_OLD_STATEID:
293 exception->retry = 1;
294 }
295 /* We failed to handle the error */
296 return nfs4_map_errors(ret);
a2c0b9e2
TM		 297do_state_recovery:
298 nfs4_schedule_state_recovery(clp);
299 ret = nfs4_wait_clnt_recover(clp);
300 if (ret == 0)
301 exception->retry = 1;
302 return ret;
65de872e
TM		 303}
304
305
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
2027struct dentry *
cd9a1c0e 2028nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2029{
cd9a1c0e 2030 struct dentry *dentry = ctx->path.dentry;
4ac91378 2031 struct dentry *parent;
1da177e4 2032 struct nfs4_state *state;
02a913a7 2033 struct dentry *res;
1da177e4 2034
565277f6
TM		 2035 parent = dentry->d_parent;
2036 /* Protect against concurrent sillydeletes */
2037 nfs_block_sillyrename(parent);
cd9a1c0e 2038 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
02a913a7 2039 if (IS_ERR(state)) {
d75340cc 2040 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2041 d_add(dentry, NULL);
d75340cc
TM		 2042 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2043 }
565277f6 2044 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2045 return (struct dentry *)state;
2046 }
24ac23ab 2047 res = d_add_unique(dentry, igrab(state->inode));
cd9a1c0e
TM		 2048 if (res != NULL) {
2049 struct dentry *dummy = ctx->path.dentry;
2050
2051 ctx->path.dentry = dget(res);
2052 dput(dummy);
2053 }
2054 ctx->state = state;
2055 nfs_set_verifier(ctx->path.dentry, nfs_save_change_attribute(dir));
565277f6 2056 nfs_unblock_sillyrename(parent);
02a913a7 2057 return res;
1da177e4
LT		 2058}
2059
2060int
02a913a7 2061nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2062{
ad389da7 2063 struct path path = {
4ac91378 2064 .mnt = nd->path.mnt,
ad389da7
TM		 2065 .dentry = dentry,
2066 };
1da177e4
LT		 2067 struct rpc_cred *cred;
2068 struct nfs4_state *state;
dc0b027d 2069 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2070
98a8e323 2071 cred = rpc_lookup_cred();
1da177e4
LT		 2072 if (IS_ERR(cred))
2073 return PTR_ERR(cred);
dc0b027d 2074 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2075 put_rpccred(cred);
02a913a7
TM		 2076 if (IS_ERR(state)) {
2077 switch (PTR_ERR(state)) {
2078 case -EPERM:
2079 case -EACCES:
2080 case -EDQUOT:
2081 case -ENOSPC:
2082 case -EROFS:
04287f97 2083 return PTR_ERR(state);
b87c0adf
CL		 2084 default:
2085 goto out_drop;
02a913a7 2086 }
02a913a7 2087 }
24ac23ab 2088 if (state->inode == dentry->d_inode) {
d75340cc 2089 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2090 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2091 return 1;
2092 }
dc0b027d 2093 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2094out_drop:
2095 d_drop(dentry);
1da177e4
LT		 2096 return 0;
2097}
2098
1185a552 2099static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2100{
2101 if (ctx->state == NULL)
2102 return;
2103 if (is_sync)
2104 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2105 else
2106 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2107}
1da177e4
LT		 2108
2109static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2110{
43652ad5
BH		 2111 struct nfs4_server_caps_arg args = {
2112 .fhandle = fhandle,
2113 };
1da177e4
LT		 2114 struct nfs4_server_caps_res res = {};
2115 struct rpc_message msg = {
2116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2117 .rpc_argp = &args,
1da177e4
LT		 2118 .rpc_resp = &res,
2119 };
2120 int status;
2121
cccef3b9 2122 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2123 if (status == 0) {
2124 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2125 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2126 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2127 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2128 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2129 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2130 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2131 server->caps |= NFS_CAP_ACLS;
2132 if (res.has_links != 0)
2133 server->caps |= NFS_CAP_HARDLINKS;
2134 if (res.has_symlinks != 0)
2135 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2136 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2137 server->caps |= NFS_CAP_FILEID;
2138 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2139 server->caps |= NFS_CAP_MODE;
2140 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2141 server->caps |= NFS_CAP_NLINK;
2142 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2143 server->caps |= NFS_CAP_OWNER;
2144 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2145 server->caps |= NFS_CAP_OWNER_GROUP;
2146 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2147 server->caps |= NFS_CAP_ATIME;
2148 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2149 server->caps |= NFS_CAP_CTIME;
2150 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2151 server->caps |= NFS_CAP_MTIME;
2152
a65318bf
TM		 2153 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2154 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2155 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2156 server->acl_bitmask = res.acl_bitmask;
2157 }
cccef3b9 2158
1da177e4
LT		 2159 return status;
2160}
2161
55a97593 2162int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2163{
2164 struct nfs4_exception exception = { };
2165 int err;
2166 do {
2167 err = nfs4_handle_exception(server,
2168 _nfs4_server_capabilities(server, fhandle),
2169 &exception);
2170 } while (exception.retry);
2171 return err;
2172}
2173
2174static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2175 struct nfs_fsinfo *info)
2176{
1da177e4
LT		 2177 struct nfs4_lookup_root_arg args = {
2178 .bitmask = nfs4_fattr_bitmap,
2179 };
2180 struct nfs4_lookup_res res = {
2181 .server = server,
0e574af1 2182 .fattr = info->fattr,
1da177e4
LT		 2183 .fh = fhandle,
2184 };
2185 struct rpc_message msg = {
2186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2187 .rpc_argp = &args,
2188 .rpc_resp = &res,
2189 };
008f55d0 2190
0e574af1 2191 nfs_fattr_init(info->fattr);
fccba804 2192 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2193}
2194
2195static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2196 struct nfs_fsinfo *info)
2197{
2198 struct nfs4_exception exception = { };
2199 int err;
2200 do {
2201 err = nfs4_handle_exception(server,
2202 _nfs4_lookup_root(server, fhandle, info),
2203 &exception);
2204 } while (exception.retry);
2205 return err;
2206}
2207
54ceac45
DH		 2208/*
2209 * get the file handle for the "/" directory on the server
2210 */
1da177e4 2211static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2212 struct nfs_fsinfo *info)
1da177e4 2213{
1da177e4
LT		 2214 int status;
2215
1da177e4 2216 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2217 if (status == 0)
2218 status = nfs4_server_capabilities(server, fhandle);
2219 if (status == 0)
2220 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2221 return nfs4_map_errors(status);
1da177e4
LT		 2222}
2223
6b97fd3d
MN		 2224/*
2225 * Get locations and (maybe) other attributes of a referral.
2226 * Note that we'll actually follow the referral later when
2227 * we detect fsid mismatch in inode revalidation
2228 */
56659e99 2229static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2230{
2231 int status = -ENOMEM;
2232 struct page *page = NULL;
2233 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2234
2235 page = alloc_page(GFP_KERNEL);
2236 if (page == NULL)
2237 goto out;
2238 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2239 if (locations == NULL)
2240 goto out;
2241
c228fd3a 2242 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2243 if (status != 0)
2244 goto out;
2245 /* Make sure server returned a different fsid for the referral */
2246 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2247 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2248 status = -EIO;
2249 goto out;
2250 }
2251
2252 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2253 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2254 if (!fattr->mode)
2255 fattr->mode = S_IFDIR;
2256 memset(fhandle, 0, sizeof(struct nfs_fh));
2257out:
2258 if (page)
2259 __free_page(page);
5d7ca35a 2260 kfree(locations);
6b97fd3d
MN		 2261 return status;
2262}
2263
1da177e4
LT		 2264static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2265{
2266 struct nfs4_getattr_arg args = {
2267 .fh = fhandle,
2268 .bitmask = server->attr_bitmask,
2269 };
2270 struct nfs4_getattr_res res = {
2271 .fattr = fattr,
2272 .server = server,
2273 };
2274 struct rpc_message msg = {
2275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2276 .rpc_argp = &args,
2277 .rpc_resp = &res,
2278 };
2279
0e574af1 2280 nfs_fattr_init(fattr);
cccef3b9 2281 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2282}
2283
2284static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2285{
2286 struct nfs4_exception exception = { };
2287 int err;
2288 do {
2289 err = nfs4_handle_exception(server,
2290 _nfs4_proc_getattr(server, fhandle, fattr),
2291 &exception);
2292 } while (exception.retry);
2293 return err;
2294}
2295
2296/*
2297 * The file is not closed if it is opened due to the a request to change
2298 * the size of the file. The open call will not be needed once the
2299 * VFS layer lookup-intents are implemented.
2300 *
2301 * Close is called when the inode is destroyed.
2302 * If we haven't opened the file for O_WRONLY, we
2303 * need to in the size_change case to obtain a stateid.
2304 *
2305 * Got race?
2306 * Because OPEN is always done by name in nfsv4, it is
2307 * possible that we opened a different file by the same
2308 * name. We can recognize this race condition, but we
2309 * can't do anything about it besides returning an error.
2310 *
2311 * This will be fixed with VFS changes (lookup-intent).
2312 */
2313static int
2314nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2315 struct iattr *sattr)
2316{
08e9eac4 2317 struct inode *inode = dentry->d_inode;
659bfcd6 2318 struct rpc_cred *cred = NULL;
d530838b 2319 struct nfs4_state *state = NULL;
1da177e4
LT		 2320 int status;
2321
0e574af1 2322 nfs_fattr_init(fattr);
1da177e4 2323
d530838b 2324 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2325 if (sattr->ia_valid & ATTR_FILE) {
2326 struct nfs_open_context *ctx;
2327
2328 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2329 if (ctx) {
2330 cred = ctx->cred;
2331 state = ctx->state;
2332 }
659bfcd6 2333 }
08e9eac4 2334
659bfcd6 2335 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2336 if (status == 0)
2337 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2338 return status;
2339}
2340
56659e99
TM		 2341static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2342 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2343 struct nfs_fattr *fattr)
2344{
2345 int status;
2346 struct nfs4_lookup_arg args = {
2347 .bitmask = server->attr_bitmask,
2348 .dir_fh = dirfh,
2349 .name = name,
2350 };
2351 struct nfs4_lookup_res res = {
2352 .server = server,
2353 .fattr = fattr,
2354 .fh = fhandle,
2355 };
2356 struct rpc_message msg = {
2357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2358 .rpc_argp = &args,
2359 .rpc_resp = &res,
2360 };
2361
2362 nfs_fattr_init(fattr);
2363
2364 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2365 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2366 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2367 return status;
2368}
2369
2370static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2371 struct qstr *name, struct nfs_fh *fhandle,
2372 struct nfs_fattr *fattr)
2373{
2374 struct nfs4_exception exception = { };
2375 int err;
2376 do {
4e56e082
TM		 2377 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2378 /* FIXME: !!!! */
2379 if (err == -NFS4ERR_MOVED) {
2380 err = -EREMOTE;
2381 break;
2382 }
2383 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2384 } while (exception.retry);
2385 return err;
2386}
2387
56659e99 2388static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2389 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2390{
4e56e082 2391 int status;
1da177e4
LT		 2392
2393 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2394 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2395 if (status == -NFS4ERR_MOVED)
2396 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2397 dprintk("NFS reply lookup: %d\n", status);
2398 return status;
2399}
2400
2401static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2402{
2403 struct nfs4_exception exception = { };
2404 int err;
2405 do {
2406 err = nfs4_handle_exception(NFS_SERVER(dir),
2407 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2408 &exception);
2409 } while (exception.retry);
2410 return err;
2411}
2412
2413static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2414{
76b32999 2415 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2416 struct nfs4_accessargs args = {
2417 .fh = NFS_FH(inode),
76b32999
TM		 2418 .bitmask = server->attr_bitmask,
2419 };
2420 struct nfs4_accessres res = {
2421 .server = server,
1da177e4 2422 };
1da177e4
LT		 2423 struct rpc_message msg = {
2424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2425 .rpc_argp = &args,
2426 .rpc_resp = &res,
2427 .rpc_cred = entry->cred,
2428 };
2429 int mode = entry->mask;
2430 int status;
2431
2432 /*
2433 * Determine which access bits we want to ask for...
2434 */
2435 if (mode & MAY_READ)
2436 args.access |= NFS4_ACCESS_READ;
2437 if (S_ISDIR(inode->i_mode)) {
2438 if (mode & MAY_WRITE)
2439 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2440 if (mode & MAY_EXEC)
2441 args.access |= NFS4_ACCESS_LOOKUP;
2442 } else {
2443 if (mode & MAY_WRITE)
2444 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2445 if (mode & MAY_EXEC)
2446 args.access |= NFS4_ACCESS_EXECUTE;
2447 }
c407d41a
TM		 2448
2449 res.fattr = nfs_alloc_fattr();
2450 if (res.fattr == NULL)
2451 return -ENOMEM;
2452
cccef3b9 2453 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2454 if (!status) {
2455 entry->mask = 0;
2456 if (res.access & NFS4_ACCESS_READ)
2457 entry->mask |= MAY_READ;
2458 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2459 entry->mask |= MAY_WRITE;
2460 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2461 entry->mask |= MAY_EXEC;
c407d41a 2462 nfs_refresh_inode(inode, res.fattr);
1da177e4 2463 }
c407d41a 2464 nfs_free_fattr(res.fattr);
1da177e4
LT		 2465 return status;
2466}
2467
2468static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2469{
2470 struct nfs4_exception exception = { };
2471 int err;
2472 do {
2473 err = nfs4_handle_exception(NFS_SERVER(inode),
2474 _nfs4_proc_access(inode, entry),
2475 &exception);
2476 } while (exception.retry);
2477 return err;
2478}
2479
2480/*
2481 * TODO: For the time being, we don't try to get any attributes
2482 * along with any of the zero-copy operations READ, READDIR,
2483 * READLINK, WRITE.
2484 *
2485 * In the case of the first three, we want to put the GETATTR
2486 * after the read-type operation -- this is because it is hard
2487 * to predict the length of a GETATTR response in v4, and thus
2488 * align the READ data correctly. This means that the GETATTR
2489 * may end up partially falling into the page cache, and we should
2490 * shift it into the 'tail' of the xdr_buf before processing.
2491 * To do this efficiently, we need to know the total length
2492 * of data received, which doesn't seem to be available outside
2493 * of the RPC layer.
2494 *
2495 * In the case of WRITE, we also want to put the GETATTR after
2496 * the operation -- in this case because we want to make sure
2497 * we get the post-operation mtime and size. This means that
2498 * we can't use xdr_encode_pages() as written: we need a variant
2499 * of it which would leave room in the 'tail' iovec.
2500 *
2501 * Both of these changes to the XDR layer would in fact be quite
2502 * minor, but I decided to leave them for a subsequent patch.
2503 */
2504static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2505 unsigned int pgbase, unsigned int pglen)
2506{
2507 struct nfs4_readlink args = {
2508 .fh = NFS_FH(inode),
2509 .pgbase = pgbase,
2510 .pglen = pglen,
2511 .pages = &page,
2512 };
f50c7000 2513 struct nfs4_readlink_res res;
1da177e4
LT		 2514 struct rpc_message msg = {
2515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2516 .rpc_argp = &args,
f50c7000 2517 .rpc_resp = &res,
1da177e4
LT		 2518 };
2519
cccef3b9 2520 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2521}
2522
2523static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2524 unsigned int pgbase, unsigned int pglen)
2525{
2526 struct nfs4_exception exception = { };
2527 int err;
2528 do {
2529 err = nfs4_handle_exception(NFS_SERVER(inode),
2530 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2531 &exception);
2532 } while (exception.retry);
2533 return err;
2534}
2535
1da177e4
LT		 2536/*
2537 * Got race?
2538 * We will need to arrange for the VFS layer to provide an atomic open.
2539 * Until then, this create/open method is prone to inefficiency and race
2540 * conditions due to the lookup, create, and open VFS calls from sys_open()
2541 * placed on the wire.
2542 *
2543 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2544 * The file will be opened again in the subsequent VFS open call
2545 * (nfs4_proc_file_open).
2546 *
2547 * The open for read will just hang around to be used by any process that
2548 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2549 */
2550
2551static int
2552nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2553 int flags, struct nameidata *nd)
1da177e4 2554{
ad389da7 2555 struct path path = {
4ac91378 2556 .mnt = nd->path.mnt,
ad389da7
TM		 2557 .dentry = dentry,
2558 };
1da177e4
LT		 2559 struct nfs4_state *state;
2560 struct rpc_cred *cred;
dc0b027d 2561 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2562 int status = 0;
2563
98a8e323 2564 cred = rpc_lookup_cred();
1da177e4
LT		 2565 if (IS_ERR(cred)) {
2566 status = PTR_ERR(cred);
2567 goto out;
2568 }
dc0b027d 2569 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2570 d_drop(dentry);
1da177e4
LT		 2571 if (IS_ERR(state)) {
2572 status = PTR_ERR(state);
659bfcd6 2573 goto out_putcred;
1da177e4 2574 }
d4d9cdcb 2575 d_add(dentry, igrab(state->inode));
d75340cc 2576 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
ad389da7 2577 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2578 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2579 else
dc0b027d 2580 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2581out_putcred:
2582 put_rpccred(cred);
1da177e4
LT		 2583out:
2584 return status;
2585}
2586
2587static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2588{
16e42959 2589 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2590 struct nfs_removeargs args = {
1da177e4 2591 .fh = NFS_FH(dir),
4fdc17b2
TM		 2592 .name.len = name->len,
2593 .name.name = name->name,
16e42959
TM		 2594 .bitmask = server->attr_bitmask,
2595 };
4fdc17b2 2596 struct nfs_removeres res = {
16e42959 2597 .server = server,
1da177e4 2598 };
1da177e4 2599 struct rpc_message msg = {
4fdc17b2
TM		 2600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2601 .rpc_argp = &args,
2602 .rpc_resp = &res,
1da177e4 2603 };
d346890b
TM		 2604 int status = -ENOMEM;
2605
2606 res.dir_attr = nfs_alloc_fattr();
2607 if (res.dir_attr == NULL)
2608 goto out;
1da177e4 2609
cccef3b9 2610 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2611 if (status == 0) {
2612 update_changeattr(dir, &res.cinfo);
d346890b 2613 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2614 }
d346890b
TM		 2615 nfs_free_fattr(res.dir_attr);
2616out:
1da177e4
LT		 2617 return status;
2618}
2619
2620static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2621{
2622 struct nfs4_exception exception = { };
2623 int err;
2624 do {
2625 err = nfs4_handle_exception(NFS_SERVER(dir),
2626 _nfs4_proc_remove(dir, name),
2627 &exception);
2628 } while (exception.retry);
2629 return err;
2630}
2631
e4eff1a6 2632static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2633{
e4eff1a6
TM		 2634 struct nfs_server *server = NFS_SERVER(dir);
2635 struct nfs_removeargs *args = msg->rpc_argp;
2636 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2637
a65318bf 2638 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2639 res->server = server;
1da177e4 2640 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2641}
2642
e4eff1a6 2643static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2644{
e4eff1a6
TM		 2645 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2646
14516c3a
TM		 2647 if (!nfs4_sequence_done(task, &res->seq_res))
2648 return 0;
9e33bed5 2649 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2650 return 0;
2651 update_changeattr(dir, &res->cinfo);
d346890b 2652 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2653 return 1;
1da177e4
LT		 2654}
2655
2656static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2657 struct inode *new_dir, struct qstr *new_name)
2658{
6caf2c82 2659 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2660 struct nfs4_rename_arg arg = {
2661 .old_dir = NFS_FH(old_dir),
2662 .new_dir = NFS_FH(new_dir),
2663 .old_name = old_name,
2664 .new_name = new_name,
6caf2c82
TM		 2665 .bitmask = server->attr_bitmask,
2666 };
6caf2c82
TM		 2667 struct nfs4_rename_res res = {
2668 .server = server,
1da177e4 2669 };
1da177e4
LT		 2670 struct rpc_message msg = {
2671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2672 .rpc_argp = &arg,
2673 .rpc_resp = &res,
2674 };
011fff72 2675 int status = -ENOMEM;
1da177e4 2676
011fff72
TM		 2677 res.old_fattr = nfs_alloc_fattr();
2678 res.new_fattr = nfs_alloc_fattr();
2679 if (res.old_fattr == NULL || res.new_fattr == NULL)
2680 goto out;
1da177e4 2681
011fff72 2682 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2683 if (!status) {
2684 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2685 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2686 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2687 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2688 }
011fff72
TM		 2689out:
2690 nfs_free_fattr(res.new_fattr);
2691 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2692 return status;
2693}
2694
2695static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2696 struct inode *new_dir, struct qstr *new_name)
2697{
2698 struct nfs4_exception exception = { };
2699 int err;
2700 do {
2701 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2702 _nfs4_proc_rename(old_dir, old_name,
2703 new_dir, new_name),
2704 &exception);
2705 } while (exception.retry);
2706 return err;
2707}
2708
2709static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2710{
91ba2eee 2711 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2712 struct nfs4_link_arg arg = {
2713 .fh = NFS_FH(inode),
2714 .dir_fh = NFS_FH(dir),
2715 .name = name,
91ba2eee
TM		 2716 .bitmask = server->attr_bitmask,
2717 };
91ba2eee
TM		 2718 struct nfs4_link_res res = {
2719 .server = server,
1da177e4 2720 };
1da177e4
LT		 2721 struct rpc_message msg = {
2722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2723 .rpc_argp = &arg,
91ba2eee 2724 .rpc_resp = &res,
1da177e4 2725 };
136f2627
TM		 2726 int status = -ENOMEM;
2727
2728 res.fattr = nfs_alloc_fattr();
2729 res.dir_attr = nfs_alloc_fattr();
2730 if (res.fattr == NULL || res.dir_attr == NULL)
2731 goto out;
1da177e4 2732
cccef3b9 2733 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2734 if (!status) {
2735 update_changeattr(dir, &res.cinfo);
2736 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2737 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2738 }
136f2627
TM		 2739out:
2740 nfs_free_fattr(res.dir_attr);
2741 nfs_free_fattr(res.fattr);
1da177e4
LT		 2742 return status;
2743}
2744
2745static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2746{
2747 struct nfs4_exception exception = { };
2748 int err;
2749 do {
2750 err = nfs4_handle_exception(NFS_SERVER(inode),
2751 _nfs4_proc_link(inode, dir, name),
2752 &exception);
2753 } while (exception.retry);
2754 return err;
2755}
2756
57dc9a57
TM		 2757struct nfs4_createdata {
2758 struct rpc_message msg;
2759 struct nfs4_create_arg arg;
2760 struct nfs4_create_res res;
2761 struct nfs_fh fh;
2762 struct nfs_fattr fattr;
2763 struct nfs_fattr dir_fattr;
2764};
2765
2766static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2767 struct qstr *name, struct iattr *sattr, u32 ftype)
2768{
2769 struct nfs4_createdata *data;
2770
2771 data = kzalloc(sizeof(*data), GFP_KERNEL);
2772 if (data != NULL) {
2773 struct nfs_server *server = NFS_SERVER(dir);
2774
2775 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2776 data->msg.rpc_argp = &data->arg;
2777 data->msg.rpc_resp = &data->res;
2778 data->arg.dir_fh = NFS_FH(dir);
2779 data->arg.server = server;
2780 data->arg.name = name;
2781 data->arg.attrs = sattr;
2782 data->arg.ftype = ftype;
2783 data->arg.bitmask = server->attr_bitmask;
2784 data->res.server = server;
2785 data->res.fh = &data->fh;
2786 data->res.fattr = &data->fattr;
2787 data->res.dir_fattr = &data->dir_fattr;
2788 nfs_fattr_init(data->res.fattr);
2789 nfs_fattr_init(data->res.dir_fattr);
2790 }
2791 return data;
2792}
2793
2794static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2795{
cccef3b9
AA		 2796 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2797 &data->arg, &data->res, 1);
57dc9a57
TM		 2798 if (status == 0) {
2799 update_changeattr(dir, &data->res.dir_cinfo);
2800 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2801 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2802 }
2803 return status;
2804}
2805
2806static void nfs4_free_createdata(struct nfs4_createdata *data)
2807{
2808 kfree(data);
2809}
2810
4f390c15 2811static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2812 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2813{
57dc9a57
TM		 2814 struct nfs4_createdata *data;
2815 int status = -ENAMETOOLONG;
1da177e4 2816
94a6d753 2817 if (len > NFS4_MAXPATHLEN)
57dc9a57 2818 goto out;
4f390c15 2819
57dc9a57
TM		 2820 status = -ENOMEM;
2821 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2822 if (data == NULL)
2823 goto out;
2824
2825 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2826 data->arg.u.symlink.pages = &page;
2827 data->arg.u.symlink.len = len;
1da177e4 2828
57dc9a57
TM		 2829 status = nfs4_do_create(dir, dentry, data);
2830
2831 nfs4_free_createdata(data);
2832out:
1da177e4
LT		 2833 return status;
2834}
2835
4f390c15 2836static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2837 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2838{
2839 struct nfs4_exception exception = { };
2840 int err;
2841 do {
2842 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2843 _nfs4_proc_symlink(dir, dentry, page,
2844 len, sattr),
1da177e4
LT		 2845 &exception);
2846 } while (exception.retry);
2847 return err;
2848}
2849
2850static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2851 struct iattr *sattr)
2852{
57dc9a57
TM		 2853 struct nfs4_createdata *data;
2854 int status = -ENOMEM;
1da177e4 2855
57dc9a57
TM		 2856 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2857 if (data == NULL)
2858 goto out;
2859
2860 status = nfs4_do_create(dir, dentry, data);
2861
2862 nfs4_free_createdata(data);
2863out:
1da177e4
LT		 2864 return status;
2865}
2866
2867static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2868 struct iattr *sattr)
2869{
2870 struct nfs4_exception exception = { };
2871 int err;
2872 do {
2873 err = nfs4_handle_exception(NFS_SERVER(dir),
2874 _nfs4_proc_mkdir(dir, dentry, sattr),
2875 &exception);
2876 } while (exception.retry);
2877 return err;
2878}
2879
2880static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2881 u64 cookie, struct page *page, unsigned int count, int plus)
2882{
2883 struct inode *dir = dentry->d_inode;
2884 struct nfs4_readdir_arg args = {
2885 .fh = NFS_FH(dir),
2886 .pages = &page,
2887 .pgbase = 0,
2888 .count = count,
96d25e53 2889 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2890 };
2891 struct nfs4_readdir_res res;
2892 struct rpc_message msg = {
2893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2894 .rpc_argp = &args,
2895 .rpc_resp = &res,
2896 .rpc_cred = cred,
2897 };
2898 int status;
2899
3110ff80 2900 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2901 dentry->d_parent->d_name.name,
2902 dentry->d_name.name,
2903 (unsigned long long)cookie);
1da177e4
LT		 2904 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2905 res.pgbase = args.pgbase;
cccef3b9 2906 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2907 if (status == 0)
2908 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2909
2910 nfs_invalidate_atime(dir);
2911
3110ff80 2912 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2913 return status;
2914}
2915
2916static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2917 u64 cookie, struct page *page, unsigned int count, int plus)
2918{
2919 struct nfs4_exception exception = { };
2920 int err;
2921 do {
2922 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2923 _nfs4_proc_readdir(dentry, cred, cookie,
2924 page, count, plus),
2925 &exception);
2926 } while (exception.retry);
2927 return err;
2928}
2929
2930static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2931 struct iattr *sattr, dev_t rdev)
2932{
57dc9a57
TM		 2933 struct nfs4_createdata *data;
2934 int mode = sattr->ia_mode;
2935 int status = -ENOMEM;
1da177e4
LT		 2936
2937 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2938 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2939
2940 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2941 if (data == NULL)
2942 goto out;
2943
1da177e4 2944 if (S_ISFIFO(mode))
57dc9a57 2945 data->arg.ftype = NF4FIFO;
1da177e4 2946 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2947 data->arg.ftype = NF4BLK;
2948 data->arg.u.device.specdata1 = MAJOR(rdev);
2949 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2950 }
2951 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2952 data->arg.ftype = NF4CHR;
2953 data->arg.u.device.specdata1 = MAJOR(rdev);
2954 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2955 }
1da177e4 2956
57dc9a57
TM		 2957 status = nfs4_do_create(dir, dentry, data);
2958
2959 nfs4_free_createdata(data);
2960out:
1da177e4
LT		 2961 return status;
2962}
2963
2964static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2965 struct iattr *sattr, dev_t rdev)
2966{
2967 struct nfs4_exception exception = { };
2968 int err;
2969 do {
2970 err = nfs4_handle_exception(NFS_SERVER(dir),
2971 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2972 &exception);
2973 } while (exception.retry);
2974 return err;
2975}
2976
2977static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2978 struct nfs_fsstat *fsstat)
2979{
2980 struct nfs4_statfs_arg args = {
2981 .fh = fhandle,
2982 .bitmask = server->attr_bitmask,
2983 };
24ad148a
BH		 2984 struct nfs4_statfs_res res = {
2985 .fsstat = fsstat,
2986 };
1da177e4
LT		 2987 struct rpc_message msg = {
2988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2989 .rpc_argp = &args,
24ad148a 2990 .rpc_resp = &res,
1da177e4
LT		 2991 };
2992
0e574af1 2993 nfs_fattr_init(fsstat->fattr);
cccef3b9 2994 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2995}
2996
2997static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2998{
2999 struct nfs4_exception exception = { };
3000 int err;
3001 do {
3002 err = nfs4_handle_exception(server,
3003 _nfs4_proc_statfs(server, fhandle, fsstat),
3004 &exception);
3005 } while (exception.retry);
3006 return err;
3007}
3008
3009static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3010 struct nfs_fsinfo *fsinfo)
3011{
3012 struct nfs4_fsinfo_arg args = {
3013 .fh = fhandle,
3014 .bitmask = server->attr_bitmask,
3015 };
3dda5e43
BH		 3016 struct nfs4_fsinfo_res res = {
3017 .fsinfo = fsinfo,
3018 };
1da177e4
LT		 3019 struct rpc_message msg = {
3020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3021 .rpc_argp = &args,
3dda5e43 3022 .rpc_resp = &res,
1da177e4
LT		 3023 };
3024
cccef3b9 3025 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3026}
3027
3028static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3029{
3030 struct nfs4_exception exception = { };
3031 int err;
3032
3033 do {
3034 err = nfs4_handle_exception(server,
3035 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3036 &exception);
3037 } while (exception.retry);
3038 return err;
3039}
3040
3041static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3042{
0e574af1 3043 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3044 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3045}
3046
3047static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3048 struct nfs_pathconf *pathconf)
3049{
3050 struct nfs4_pathconf_arg args = {
3051 .fh = fhandle,
3052 .bitmask = server->attr_bitmask,
3053 };
d45b2989
BH		 3054 struct nfs4_pathconf_res res = {
3055 .pathconf = pathconf,
3056 };
1da177e4
LT		 3057 struct rpc_message msg = {
3058 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3059 .rpc_argp = &args,
d45b2989 3060 .rpc_resp = &res,
1da177e4
LT		 3061 };
3062
3063 /* None of the pathconf attributes are mandatory to implement */
3064 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3065 memset(pathconf, 0, sizeof(*pathconf));
3066 return 0;
3067 }
3068
0e574af1 3069 nfs_fattr_init(pathconf->fattr);
cccef3b9 3070 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3071}
3072
3073static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3074 struct nfs_pathconf *pathconf)
3075{
3076 struct nfs4_exception exception = { };
3077 int err;
3078
3079 do {
3080 err = nfs4_handle_exception(server,
3081 _nfs4_proc_pathconf(server, fhandle, pathconf),
3082 &exception);
3083 } while (exception.retry);
3084 return err;
3085}
3086
ec06c096 3087static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3088{
ec06c096 3089 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3090
f11c88af
AA		 3091 dprintk("--> %s\n", __func__);
3092
14516c3a
TM		 3093 if (!nfs4_sequence_done(task, &data->res.seq_res))
3094 return -EAGAIN;
f11c88af 3095
9e33bed5 3096 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3097 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3098 return -EAGAIN;
1da177e4 3099 }
8850df99
TM		 3100
3101 nfs_invalidate_atime(data->inode);
1da177e4 3102 if (task->tk_status > 0)
ec06c096
TM		 3103 renew_lease(server, data->timestamp);
3104 return 0;
1da177e4
LT		 3105}
3106
bdc7f021 3107static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3108{
1da177e4 3109 data->timestamp = jiffies;
bdc7f021 3110 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3111}
3112
788e7a89 3113static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3114{
1da177e4
LT		 3115 struct inode *inode = data->inode;
3116
14516c3a
TM		 3117 if (!nfs4_sequence_done(task, &data->res.seq_res))
3118 return -EAGAIN;
def6ed7e 3119
9e33bed5 3120 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3121 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3122 return -EAGAIN;
1da177e4 3123 }
4f9838c7 3124 if (task->tk_status >= 0) {
1da177e4 3125 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3126 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3127 }
788e7a89 3128 return 0;
1da177e4
LT		 3129}
3130
bdc7f021 3131static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3132{
bdc7f021
TM		 3133 struct nfs_server *server = NFS_SERVER(data->inode);
3134
a65318bf 3135 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3136 data->res.server = server;
1da177e4
LT		 3137 data->timestamp = jiffies;
3138
bdc7f021 3139 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3140}
3141
788e7a89 3142static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3143{
1da177e4
LT		 3144 struct inode *inode = data->inode;
3145
14516c3a
TM		 3146 if (!nfs4_sequence_done(task, &data->res.seq_res))
3147 return -EAGAIN;
3148
9e33bed5 3149 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3150 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3151 return -EAGAIN;
1da177e4 3152 }
9e08a3c5 3153 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3154 return 0;
1da177e4
LT		 3155}
3156
bdc7f021 3157static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3158{
788e7a89 3159 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3160
a65318bf 3161 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3162 data->res.server = server;
bdc7f021 3163 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3164}
3165
9bc4e3ca
CL		 3166struct nfs4_renewdata {
3167 struct nfs_client *client;
3168 unsigned long timestamp;
3169};
3170
1da177e4
LT		 3171/*
3172 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3173 * standalone procedure for queueing an asynchronous RENEW.
3174 */
9bc4e3ca 3175static void nfs4_renew_release(void *calldata)
dc96aef9 3176{
9bc4e3ca
CL		 3177 struct nfs4_renewdata *data = calldata;
3178 struct nfs_client *clp = data->client;
dc96aef9 3179
0851de06
AB		 3180 if (atomic_read(&clp->cl_count) > 1)
3181 nfs4_schedule_state_renewal(clp);
3182 nfs_put_client(clp);
9bc4e3ca 3183 kfree(data);
dc96aef9
AB		 3184}
3185
9bc4e3ca 3186static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3187{
9bc4e3ca
CL		 3188 struct nfs4_renewdata *data = calldata;
3189 struct nfs_client *clp = data->client;
3190 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3191
3192 if (task->tk_status < 0) {
95baa25c
TM		 3193 /* Unless we're shutting down, schedule state recovery! */
3194 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3195 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3196 return;
3197 }
452e9352 3198 do_renew_lease(clp, timestamp);
1da177e4
LT		 3199}
3200
963d8fe5
TM		 3201static const struct rpc_call_ops nfs4_renew_ops = {
3202 .rpc_call_done = nfs4_renew_done,
dc96aef9 3203 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3204};
3205
adfa6f98 3206int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3207{
3208 struct rpc_message msg = {
3209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3210 .rpc_argp = clp,
b4454fe1 3211 .rpc_cred = cred,
1da177e4 3212 };
9bc4e3ca 3213 struct nfs4_renewdata *data;
1da177e4 3214
0851de06
AB		 3215 if (!atomic_inc_not_zero(&clp->cl_count))
3216 return -EIO;
9bc4e3ca
CL		 3217 data = kmalloc(sizeof(*data), GFP_KERNEL);
3218 if (data == NULL)
3219 return -ENOMEM;
3220 data->client = clp;
3221 data->timestamp = jiffies;
1da177e4 3222 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3223 &nfs4_renew_ops, data);
1da177e4
LT		 3224}
3225
adfa6f98 3226int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3227{
3228 struct rpc_message msg = {
3229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3230 .rpc_argp = clp,
b4454fe1 3231 .rpc_cred = cred,
1da177e4
LT		 3232 };
3233 unsigned long now = jiffies;
3234 int status;
3235
3236 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3237 if (status < 0)
3238 return status;
452e9352 3239 do_renew_lease(clp, now);
1da177e4
LT		 3240 return 0;
3241}
3242
aa1870af
BF		 3243static inline int nfs4_server_supports_acls(struct nfs_server *server)
3244{
3245 return (server->caps & NFS_CAP_ACLS)
3246 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3247 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3248}
3249
3250/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3251 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3252 * the stack.
3253 */
3254#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3255
3256static void buf_to_pages(const void *buf, size_t buflen,
3257 struct page **pages, unsigned int *pgbase)
3258{
3259 const void *p = buf;
3260
3261 *pgbase = offset_in_page(buf);
3262 p -= *pgbase;
3263 while (p < buf + buflen) {
3264 *(pages++) = virt_to_page(p);
3265 p += PAGE_CACHE_SIZE;
3266 }
3267}
3268
e50a1c2e
BF		 3269struct nfs4_cached_acl {
3270 int cached;
3271 size_t len;
3e9d4154 3272 char data[0];
e50a1c2e
BF		 3273};
3274
3275static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3276{
3277 struct nfs_inode *nfsi = NFS_I(inode);
3278
3279 spin_lock(&inode->i_lock);
3280 kfree(nfsi->nfs4_acl);
3281 nfsi->nfs4_acl = acl;
3282 spin_unlock(&inode->i_lock);
3283}
3284
3285static void nfs4_zap_acl_attr(struct inode *inode)
3286{
3287 nfs4_set_cached_acl(inode, NULL);
3288}
3289
3290static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3291{
3292 struct nfs_inode *nfsi = NFS_I(inode);
3293 struct nfs4_cached_acl *acl;
3294 int ret = -ENOENT;
3295
3296 spin_lock(&inode->i_lock);
3297 acl = nfsi->nfs4_acl;
3298 if (acl == NULL)
3299 goto out;
3300 if (buf == NULL) /* user is just asking for length */
3301 goto out_len;
3302 if (acl->cached == 0)
3303 goto out;
3304 ret = -ERANGE; /* see getxattr(2) man page */
3305 if (acl->len > buflen)
3306 goto out;
3307 memcpy(buf, acl->data, acl->len);
3308out_len:
3309 ret = acl->len;
3310out:
3311 spin_unlock(&inode->i_lock);
3312 return ret;
3313}
3314
3315static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3316{
3317 struct nfs4_cached_acl *acl;
3318
3319 if (buf && acl_len <= PAGE_SIZE) {
3320 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3321 if (acl == NULL)
3322 goto out;
3323 acl->cached = 1;
3324 memcpy(acl->data, buf, acl_len);
3325 } else {
3326 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3327 if (acl == NULL)
3328 goto out;
3329 acl->cached = 0;
3330 }
3331 acl->len = acl_len;
3332out:
3333 nfs4_set_cached_acl(inode, acl);
3334}
3335
16b4289c 3336static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3337{
aa1870af
BF		 3338 struct page *pages[NFS4ACL_MAXPAGES];
3339 struct nfs_getaclargs args = {
3340 .fh = NFS_FH(inode),
3341 .acl_pages = pages,
3342 .acl_len = buflen,
3343 };
663c79b3
BH		 3344 struct nfs_getaclres res = {
3345 .acl_len = buflen,
3346 };
e50a1c2e 3347 void *resp_buf;
aa1870af
BF		 3348 struct rpc_message msg = {
3349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3350 .rpc_argp = &args,
663c79b3 3351 .rpc_resp = &res,
aa1870af 3352 };
e50a1c2e 3353 struct page *localpage = NULL;
aa1870af
BF		 3354 int ret;
3355
e50a1c2e
BF		 3356 if (buflen < PAGE_SIZE) {
3357 /* As long as we're doing a round trip to the server anyway,
3358 * let's be prepared for a page of acl data. */
3359 localpage = alloc_page(GFP_KERNEL);
3360 resp_buf = page_address(localpage);
3361 if (localpage == NULL)
3362 return -ENOMEM;
3363 args.acl_pages[0] = localpage;
3364 args.acl_pgbase = 0;
663c79b3 3365 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3366 } else {
3367 resp_buf = buf;
3368 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3369 }
cccef3b9 3370 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3371 if (ret)
3372 goto out_free;
663c79b3
BH		 3373 if (res.acl_len > args.acl_len)
3374 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3375 else
663c79b3 3376 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3377 if (buf) {
3378 ret = -ERANGE;
663c79b3 3379 if (res.acl_len > buflen)
e50a1c2e
BF		 3380 goto out_free;
3381 if (localpage)
663c79b3 3382 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3383 }
663c79b3 3384 ret = res.acl_len;
e50a1c2e
BF		 3385out_free:
3386 if (localpage)
3387 __free_page(localpage);
aa1870af
BF		 3388 return ret;
3389}
3390
16b4289c
TM		 3391static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3392{
3393 struct nfs4_exception exception = { };
3394 ssize_t ret;
3395 do {
3396 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3397 if (ret >= 0)
3398 break;
3399 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3400 } while (exception.retry);
3401 return ret;
3402}
3403
e50a1c2e
BF		 3404static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3405{
3406 struct nfs_server *server = NFS_SERVER(inode);
3407 int ret;
3408
3409 if (!nfs4_server_supports_acls(server))
3410 return -EOPNOTSUPP;
3411 ret = nfs_revalidate_inode(server, inode);
3412 if (ret < 0)
3413 return ret;
3414 ret = nfs4_read_cached_acl(inode, buf, buflen);
3415 if (ret != -ENOENT)
3416 return ret;
3417 return nfs4_get_acl_uncached(inode, buf, buflen);
3418}
3419
16b4289c 3420static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3421{
3422 struct nfs_server *server = NFS_SERVER(inode);
3423 struct page *pages[NFS4ACL_MAXPAGES];
3424 struct nfs_setaclargs arg = {
3425 .fh = NFS_FH(inode),
3426 .acl_pages = pages,
3427 .acl_len = buflen,
3428 };
73c403a9 3429 struct nfs_setaclres res;
4b580ee3
BF		 3430 struct rpc_message msg = {
3431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3432 .rpc_argp = &arg,
73c403a9 3433 .rpc_resp = &res,
4b580ee3
BF		 3434 };
3435 int ret;
3436
3437 if (!nfs4_server_supports_acls(server))
3438 return -EOPNOTSUPP;
642ac549 3439 nfs_inode_return_delegation(inode);
4b580ee3 3440 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3441 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3442 nfs_access_zap_cache(inode);
3443 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3444 return ret;
3445}
3446
16b4289c
TM		 3447static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3448{
3449 struct nfs4_exception exception = { };
3450 int err;
3451 do {
3452 err = nfs4_handle_exception(NFS_SERVER(inode),
3453 __nfs4_proc_set_acl(inode, buf, buflen),
3454 &exception);
3455 } while (exception.retry);
3456 return err;
3457}
3458
1da177e4 3459static int
aa5190d0 3460nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3461{
aa5190d0
TM		 3462 struct nfs_client *clp = server->nfs_client;
3463
3464 if (task->tk_status >= 0)
1da177e4
LT		 3465 return 0;
3466 switch(task->tk_status) {
9e33bed5
TM		 3467 case -NFS4ERR_ADMIN_REVOKED:
3468 case -NFS4ERR_BAD_STATEID:
3469 case -NFS4ERR_OPENMODE:
3470 if (state == NULL)
3471 break;
3472 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3473 goto do_state_recovery;
1da177e4 3474 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3475 if (state == NULL)
3476 break;
3477 nfs4_state_mark_reclaim_reboot(clp, state);
3478 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3479 case -NFS4ERR_EXPIRED:
a2c0b9e2 3480 goto do_state_recovery;
4745e315
AA		 3481#if defined(CONFIG_NFS_V4_1)
3482 case -NFS4ERR_BADSESSION:
3483 case -NFS4ERR_BADSLOT:
3484 case -NFS4ERR_BAD_HIGH_SLOT:
3485 case -NFS4ERR_DEADSESSION:
3486 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3487 case -NFS4ERR_SEQ_FALSE_RETRY:
3488 case -NFS4ERR_SEQ_MISORDERED:
3489 dprintk("%s ERROR %d, Reset session\n", __func__,
3490 task->tk_status);
0b9e2d41 3491 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3492 task->tk_status = 0;
3493 return -EAGAIN;
3494#endif /* CONFIG_NFS_V4_1 */
1da177e4 3495 case -NFS4ERR_DELAY:
aa5190d0 3496 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3497 case -NFS4ERR_GRACE:
2c643488 3498 case -EKEYEXPIRED:
1da177e4
LT		 3499 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3500 task->tk_status = 0;
3501 return -EAGAIN;
3502 case -NFS4ERR_OLD_STATEID:
3503 task->tk_status = 0;
3504 return -EAGAIN;
3505 }
3506 task->tk_status = nfs4_map_errors(task->tk_status);
3507 return 0;
a2c0b9e2
TM		 3508do_state_recovery:
3509 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3510 nfs4_schedule_state_recovery(clp);
3511 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3512 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3513 task->tk_status = 0;
3514 return -EAGAIN;
1da177e4
LT		 3515}
3516
bb8b27e5
TM		 3517int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3518 unsigned short port, struct rpc_cred *cred,
3519 struct nfs4_setclientid_res *res)
1da177e4
LT		 3520{
3521 nfs4_verifier sc_verifier;
3522 struct nfs4_setclientid setclientid = {
3523 .sc_verifier = &sc_verifier,
3524 .sc_prog = program,
3525 };
3526 struct rpc_message msg = {
3527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3528 .rpc_argp = &setclientid,
bb8b27e5 3529 .rpc_resp = res,
286d7d6a 3530 .rpc_cred = cred,
1da177e4 3531 };
bc4785cd 3532 __be32 *p;
1da177e4
LT		 3533 int loop = 0;
3534 int status;
3535
bc4785cd 3536 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3537 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3538 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3539
3540 for(;;) {
3541 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3542 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3543 clp->cl_ipaddr,
3544 rpc_peeraddr2str(clp->cl_rpcclient,
3545 RPC_DISPLAY_ADDR),
69dd716c
TM		 3546 rpc_peeraddr2str(clp->cl_rpcclient,
3547 RPC_DISPLAY_PROTO),
78ea323b 3548 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3549 clp->cl_id_uniquifier);
3550 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3551 sizeof(setclientid.sc_netid),
3552 rpc_peeraddr2str(clp->cl_rpcclient,
3553 RPC_DISPLAY_NETID));
1da177e4 3554 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3555 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3556 clp->cl_ipaddr, port >> 8, port & 255);
3557
3558 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3559 if (status != -NFS4ERR_CLID_INUSE)
3560 break;
3561 if (signalled())
3562 break;
3563 if (loop++ & 1)
3564 ssleep(clp->cl_lease_time + 1);
3565 else
3566 if (++clp->cl_id_uniquifier == 0)
3567 break;
3568 }
3569 return status;
3570}
3571
bb8b27e5
TM		 3572static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3573 struct nfs4_setclientid_res *arg,
3574 struct rpc_cred *cred)
1da177e4
LT		 3575{
3576 struct nfs_fsinfo fsinfo;
3577 struct rpc_message msg = {
3578 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3579 .rpc_argp = arg,
1da177e4 3580 .rpc_resp = &fsinfo,
286d7d6a 3581 .rpc_cred = cred,
1da177e4
LT		 3582 };
3583 unsigned long now;
3584 int status;
3585
3586 now = jiffies;
3587 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3588 if (status == 0) {
3589 spin_lock(&clp->cl_lock);
3590 clp->cl_lease_time = fsinfo.lease_time * HZ;
3591 clp->cl_last_renewal = now;
3592 spin_unlock(&clp->cl_lock);
3593 }
3594 return status;
3595}
3596
bb8b27e5
TM		 3597int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3598 struct nfs4_setclientid_res *arg,
3599 struct rpc_cred *cred)
51581f3b 3600{
77e03677 3601 long timeout = 0;
51581f3b
TM		 3602 int err;
3603 do {
bb8b27e5 3604 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3605 switch (err) {
3606 case 0:
3607 return err;
3608 case -NFS4ERR_RESOURCE:
3609 /* The IBM lawyers misread another document! */
3610 case -NFS4ERR_DELAY:
2c643488 3611 case -EKEYEXPIRED:
51581f3b
TM		 3612 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3613 }
3614 } while (err == 0);
3615 return err;
3616}
3617
fe650407
TM		 3618struct nfs4_delegreturndata {
3619 struct nfs4_delegreturnargs args;
fa178f29 3620 struct nfs4_delegreturnres res;
fe650407
TM		 3621 struct nfs_fh fh;
3622 nfs4_stateid stateid;
26e976a8 3623 unsigned long timestamp;
fa178f29 3624 struct nfs_fattr fattr;
fe650407
TM		 3625 int rpc_status;
3626};
3627
fe650407
TM		 3628static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3629{
3630 struct nfs4_delegreturndata *data = calldata;
938e1010 3631
14516c3a
TM		 3632 if (!nfs4_sequence_done(task, &data->res.seq_res))
3633 return;
938e1010 3634
79708861
RL		 3635 switch (task->tk_status) {
3636 case -NFS4ERR_STALE_STATEID:
3637 case -NFS4ERR_EXPIRED:
3638 case 0:
fa178f29 3639 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3640 break;
3641 default:
3642 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3643 -EAGAIN) {
3644 nfs_restart_rpc(task, data->res.server->nfs_client);
3645 return;
3646 }
3647 }
3648 data->rpc_status = task->tk_status;
fe650407
TM		 3649}
3650
3651static void nfs4_delegreturn_release(void *calldata)
3652{
fe650407
TM		 3653 kfree(calldata);
3654}
3655
938e1010
AA		 3656#if defined(CONFIG_NFS_V4_1)
3657static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3658{
3659 struct nfs4_delegreturndata *d_data;
3660
3661 d_data = (struct nfs4_delegreturndata *)data;
3662
035168ab 3663 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3664 &d_data->args.seq_args,
3665 &d_data->res.seq_res, 1, task))
3666 return;
3667 rpc_call_start(task);
3668}
3669#endif /* CONFIG_NFS_V4_1 */
3670
c8d149f3 3671static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3672#if defined(CONFIG_NFS_V4_1)
3673 .rpc_call_prepare = nfs4_delegreturn_prepare,
3674#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3675 .rpc_call_done = nfs4_delegreturn_done,
3676 .rpc_release = nfs4_delegreturn_release,
3677};
3678
e6f81075 3679static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3680{
3681 struct nfs4_delegreturndata *data;
fa178f29 3682 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3683 struct rpc_task *task;
5138fde0
TM		 3684 struct rpc_message msg = {
3685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3686 .rpc_cred = cred,
3687 };
c970aa85
TM		 3688 struct rpc_task_setup task_setup_data = {
3689 .rpc_client = server->client,
5138fde0 3690 .rpc_message = &msg,
c970aa85
TM		 3691 .callback_ops = &nfs4_delegreturn_ops,
3692 .flags = RPC_TASK_ASYNC,
3693 };
e6f81075 3694 int status = 0;
fe650407 3695
8535b2be 3696 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3697 if (data == NULL)
3698 return -ENOMEM;
3699 data->args.fhandle = &data->fh;
3700 data->args.stateid = &data->stateid;
fa178f29 3701 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3702 nfs_copy_fh(&data->fh, NFS_FH(inode));
3703 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3704 data->res.fattr = &data->fattr;
3705 data->res.server = server;
5f7dbd5c 3706 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3707 nfs_fattr_init(data->res.fattr);
26e976a8 3708 data->timestamp = jiffies;
fe650407
TM		 3709 data->rpc_status = 0;
3710
c970aa85 3711 task_setup_data.callback_data = data;
5138fde0
TM		 3712 msg.rpc_argp = &data->args,
3713 msg.rpc_resp = &data->res,
c970aa85 3714 task = rpc_run_task(&task_setup_data);
7a1218a2 3715 if (IS_ERR(task))
fe650407 3716 return PTR_ERR(task);
e6f81075
TM		 3717 if (!issync)
3718 goto out;
fe650407 3719 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3720 if (status != 0)
3721 goto out;
3722 status = data->rpc_status;
3723 if (status != 0)
3724 goto out;
3725 nfs_refresh_inode(inode, &data->fattr);
3726out:
e6b3c4db 3727 rpc_put_task(task);
fe650407 3728 return status;
1da177e4
LT		 3729}
3730
e6f81075 3731int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3732{
3733 struct nfs_server *server = NFS_SERVER(inode);
3734 struct nfs4_exception exception = { };
3735 int err;
3736 do {
e6f81075 3737 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3738 switch (err) {
3739 case -NFS4ERR_STALE_STATEID:
3740 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3741 case 0:
3742 return 0;
3743 }
3744 err = nfs4_handle_exception(server, err, &exception);
3745 } while (exception.retry);
3746 return err;
3747}
3748
3749#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3750#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3751
3752/*
3753 * sleep, with exponential backoff, and retry the LOCK operation.
3754 */
3755static unsigned long
3756nfs4_set_lock_task_retry(unsigned long timeout)
3757{
150030b7 3758 schedule_timeout_killable(timeout);
1da177e4
LT		 3759 timeout <<= 1;
3760 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3761 return NFS4_LOCK_MAXTIMEOUT;
3762 return timeout;
3763}
3764
1da177e4
LT		 3765static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3766{
3767 struct inode *inode = state->inode;
3768 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3769 struct nfs_client *clp = server->nfs_client;
911d1aaf 3770 struct nfs_lockt_args arg = {
1da177e4 3771 .fh = NFS_FH(inode),
911d1aaf 3772 .fl = request,
1da177e4 3773 };
911d1aaf
TM		 3774 struct nfs_lockt_res res = {
3775 .denied = request,
1da177e4
LT		 3776 };
3777 struct rpc_message msg = {
3778 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3779 .rpc_argp = &arg,
3780 .rpc_resp = &res,
3781 .rpc_cred = state->owner->so_cred,
3782 };
1da177e4
LT		 3783 struct nfs4_lock_state *lsp;
3784 int status;
3785
911d1aaf 3786 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3787 status = nfs4_set_lock_state(state, request);
3788 if (status != 0)
3789 goto out;
3790 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3791 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3792 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3793 switch (status) {
3794 case 0:
3795 request->fl_type = F_UNLCK;
3796 break;
3797 case -NFS4ERR_DENIED:
3798 status = 0;
1da177e4 3799 }
70cc6487 3800 request->fl_ops->fl_release_private(request);
8d0a8a9d 3801out:
1da177e4
LT		 3802 return status;
3803}
3804
3805static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3806{
3807 struct nfs4_exception exception = { };
3808 int err;
3809
3810 do {
3811 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3812 _nfs4_proc_getlk(state, cmd, request),
3813 &exception);
3814 } while (exception.retry);
3815 return err;
3816}
3817
3818static int do_vfs_lock(struct file *file, struct file_lock *fl)
3819{
3820 int res = 0;
3821 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3822 case FL_POSIX:
3823 res = posix_lock_file_wait(file, fl);
3824 break;
3825 case FL_FLOCK:
3826 res = flock_lock_file_wait(file, fl);
3827 break;
3828 default:
3829 BUG();
3830 }
1da177e4
LT		 3831 return res;
3832}
3833
faf5f49c 3834struct nfs4_unlockdata {
911d1aaf
TM		 3835 struct nfs_locku_args arg;
3836 struct nfs_locku_res res;
faf5f49c
TM		 3837 struct nfs4_lock_state *lsp;
3838 struct nfs_open_context *ctx;
911d1aaf
TM		 3839 struct file_lock fl;
3840 const struct nfs_server *server;
26e976a8 3841 unsigned long timestamp;
faf5f49c
TM		 3842};
3843
911d1aaf
TM		 3844static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3845 struct nfs_open_context *ctx,
3846 struct nfs4_lock_state *lsp,
3847 struct nfs_seqid *seqid)
3848{
3849 struct nfs4_unlockdata *p;
3850 struct inode *inode = lsp->ls_state->inode;
3851
8535b2be 3852 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3853 if (p == NULL)
3854 return NULL;
3855 p->arg.fh = NFS_FH(inode);
3856 p->arg.fl = &p->fl;
3857 p->arg.seqid = seqid;
c1d51931 3858 p->res.seqid = seqid;
5f7dbd5c 3859 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3860 p->arg.stateid = &lsp->ls_stateid;
3861 p->lsp = lsp;
3862 atomic_inc(&lsp->ls_count);
3863 /* Ensure we don't close file until we're done freeing locks! */
3864 p->ctx = get_nfs_open_context(ctx);
3865 memcpy(&p->fl, fl, sizeof(p->fl));
3866 p->server = NFS_SERVER(inode);
3867 return p;
3868}
3869
06f814a3 3870static void nfs4_locku_release_calldata(void *data)
faf5f49c 3871{
963d8fe5 3872 struct nfs4_unlockdata *calldata = data;
911d1aaf 3873 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3874 nfs4_put_lock_state(calldata->lsp);
3875 put_nfs_open_context(calldata->ctx);
3876 kfree(calldata);
faf5f49c
TM		 3877}
3878
963d8fe5 3879static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3880{
963d8fe5 3881 struct nfs4_unlockdata *calldata = data;
faf5f49c 3882
14516c3a
TM		 3883 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3884 return;
faf5f49c
TM		 3885 switch (task->tk_status) {
3886 case 0:
3887 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3888 calldata->res.stateid.data,
faf5f49c 3889 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3890 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3891 break;
9e33bed5
TM		 3892 case -NFS4ERR_BAD_STATEID:
3893 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3894 case -NFS4ERR_STALE_STATEID:
3895 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3896 break;
3897 default:
9e33bed5 3898 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3899 nfs_restart_rpc(task,
d61e612a 3900 calldata->server->nfs_client);
faf5f49c 3901 }
faf5f49c
TM		 3902}
3903
4ce70ada 3904static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3905{
4ce70ada 3906 struct nfs4_unlockdata *calldata = data;
faf5f49c 3907
911d1aaf 3908 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3909 return;
3910 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3911 /* Note: exit _without_ running nfs4_locku_done */
3912 task->tk_action = NULL;
faf5f49c
TM		 3913 return;
3914 }
26e976a8 3915 calldata->timestamp = jiffies;
035168ab 3916 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3917 &calldata->arg.seq_args,
3918 &calldata->res.seq_res, 1, task))
3919 return;
5138fde0 3920 rpc_call_start(task);
faf5f49c
TM		 3921}
3922
963d8fe5 3923static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3924 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3925 .rpc_call_done = nfs4_locku_done,
06f814a3 3926 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3927};
3928
a5d16a4d
TM		 3929static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3930 struct nfs_open_context *ctx,
3931 struct nfs4_lock_state *lsp,
3932 struct nfs_seqid *seqid)
3933{
3934 struct nfs4_unlockdata *data;
5138fde0
TM		 3935 struct rpc_message msg = {
3936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3937 .rpc_cred = ctx->cred,
3938 };
c970aa85
TM		 3939 struct rpc_task_setup task_setup_data = {
3940 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3941 .rpc_message = &msg,
c970aa85 3942 .callback_ops = &nfs4_locku_ops,
101070ca 3943 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3944 .flags = RPC_TASK_ASYNC,
3945 };
a5d16a4d 3946
137d6aca
FF		 3947 /* Ensure this is an unlock - when canceling a lock, the
3948 * canceled lock is passed in, and it won't be an unlock.
3949 */
3950 fl->fl_type = F_UNLCK;
3951
a5d16a4d
TM		 3952 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3953 if (data == NULL) {
3954 nfs_free_seqid(seqid);
3955 return ERR_PTR(-ENOMEM);
3956 }
3957
5138fde0
TM		 3958 msg.rpc_argp = &data->arg,
3959 msg.rpc_resp = &data->res,
c970aa85
TM		 3960 task_setup_data.callback_data = data;
3961 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3962}
3963
faf5f49c
TM		 3964static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3965{
19e03c57 3966 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3967 struct nfs_seqid *seqid;
1da177e4 3968 struct nfs4_lock_state *lsp;
06f814a3
TM		 3969 struct rpc_task *task;
3970 int status = 0;
536ff0f8 3971 unsigned char fl_flags = request->fl_flags;
faf5f49c 3972
8d0a8a9d 3973 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3974 /* Unlock _before_ we do the RPC call */
3975 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3976 down_read(&nfsi->rwsem);
3977 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3978 up_read(&nfsi->rwsem);
9b073574 3979 goto out;
19e03c57
TM		 3980 }
3981 up_read(&nfsi->rwsem);
8d0a8a9d 3982 if (status != 0)
9b073574
TM		 3983 goto out;
3984 /* Is this a delegated lock? */
3985 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3986 goto out;
8d0a8a9d 3987 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 3988 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 3989 status = -ENOMEM;
911d1aaf 3990 if (seqid == NULL)
9b073574 3991 goto out;
cd3758e3 3992 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3993 status = PTR_ERR(task);
3994 if (IS_ERR(task))
9b073574 3995 goto out;
a5d16a4d 3996 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3997 rpc_put_task(task);
9b073574 3998out:
536ff0f8 3999 request->fl_flags = fl_flags;
1da177e4
LT		 4000 return status;
4001}
4002
a5d16a4d
TM		 4003struct nfs4_lockdata {
4004 struct nfs_lock_args arg;
4005 struct nfs_lock_res res;
4006 struct nfs4_lock_state *lsp;
4007 struct nfs_open_context *ctx;
4008 struct file_lock fl;
26e976a8 4009 unsigned long timestamp;
a5d16a4d
TM		 4010 int rpc_status;
4011 int cancelled;
66179efe 4012 struct nfs_server *server;
a5d16a4d
TM		 4013};
4014
4015static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4016 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4017 gfp_t gfp_mask)
1da177e4 4018{
a5d16a4d
TM		 4019 struct nfs4_lockdata *p;
4020 struct inode *inode = lsp->ls_state->inode;
1da177e4 4021 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4022
8535b2be 4023 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4024 if (p == NULL)
4025 return NULL;
4026
4027 p->arg.fh = NFS_FH(inode);
4028 p->arg.fl = &p->fl;
8535b2be 4029 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4030 if (p->arg.open_seqid == NULL)
4031 goto out_free;
8535b2be 4032 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4033 if (p->arg.lock_seqid == NULL)
2f74c0a0 4034 goto out_free_seqid;
a5d16a4d 4035 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4036 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4037 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 4038 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 4039 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 4040 p->lsp = lsp;
66179efe 4041 p->server = server;
a5d16a4d
TM		 4042 atomic_inc(&lsp->ls_count);
4043 p->ctx = get_nfs_open_context(ctx);
4044 memcpy(&p->fl, fl, sizeof(p->fl));
4045 return p;
2f74c0a0
TM		 4046out_free_seqid:
4047 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4048out_free:
4049 kfree(p);
4050 return NULL;
4051}
4052
4053static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4054{
4055 struct nfs4_lockdata *data = calldata;
4056 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4057
3110ff80 4058 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4059 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4060 return;
a5d16a4d
TM		 4061 /* Do we need to do an open_to_lock_owner? */
4062 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4063 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4064 return;
a5d16a4d
TM		 4065 data->arg.open_stateid = &state->stateid;
4066 data->arg.new_lock_owner = 1;
c1d51931 4067 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4068 } else
4069 data->arg.new_lock_owner = 0;
26e976a8 4070 data->timestamp = jiffies;
035168ab
TM		 4071 if (nfs4_setup_sequence(data->server,
4072 &data->arg.seq_args,
66179efe
AA		 4073 &data->res.seq_res, 1, task))
4074 return;
5138fde0 4075 rpc_call_start(task);
3110ff80 4076 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4077}
4078
b257957e
AB		 4079static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4080{
4081 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4082 nfs4_lock_prepare(task, calldata);
4083}
4084
a5d16a4d
TM		 4085static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4086{
4087 struct nfs4_lockdata *data = calldata;
4088
3110ff80 4089 dprintk("%s: begin!\n", __func__);
a5d16a4d 4090
14516c3a
TM		 4091 if (!nfs4_sequence_done(task, &data->res.seq_res))
4092 return;
66179efe 4093
a5d16a4d 4094 data->rpc_status = task->tk_status;
a5d16a4d 4095 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4096 if (data->rpc_status == 0)
4097 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4098 else
4099 goto out;
4100 }
4101 if (data->rpc_status == 0) {
4102 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4103 sizeof(data->lsp->ls_stateid.data));
4104 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4105 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4106 }
a5d16a4d 4107out:
3110ff80 4108 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4109}
4110
4111static void nfs4_lock_release(void *calldata)
4112{
4113 struct nfs4_lockdata *data = calldata;
4114
3110ff80 4115 dprintk("%s: begin!\n", __func__);
2f74c0a0 4116 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4117 if (data->cancelled != 0) {
4118 struct rpc_task *task;
4119 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4120 data->arg.lock_seqid);
4121 if (!IS_ERR(task))
e6b3c4db 4122 rpc_put_task(task);
3110ff80 4123 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4124 } else
4125 nfs_free_seqid(data->arg.lock_seqid);
4126 nfs4_put_lock_state(data->lsp);
4127 put_nfs_open_context(data->ctx);
4128 kfree(data);
3110ff80 4129 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4130}
4131
4132static const struct rpc_call_ops nfs4_lock_ops = {
4133 .rpc_call_prepare = nfs4_lock_prepare,
4134 .rpc_call_done = nfs4_lock_done,
4135 .rpc_release = nfs4_lock_release,
4136};
4137
b257957e
AB		 4138static const struct rpc_call_ops nfs4_recover_lock_ops = {
4139 .rpc_call_prepare = nfs4_recover_lock_prepare,
4140 .rpc_call_done = nfs4_lock_done,
4141 .rpc_release = nfs4_lock_release,
4142};
4143
2bee72a6
TM		 4144static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4145{
4146 struct nfs_client *clp = server->nfs_client;
4147 struct nfs4_state *state = lsp->ls_state;
4148
4149 switch (error) {
4150 case -NFS4ERR_ADMIN_REVOKED:
4151 case -NFS4ERR_BAD_STATEID:
4152 case -NFS4ERR_EXPIRED:
4153 if (new_lock_owner != 0 ||
4154 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4155 nfs4_state_mark_reclaim_nograce(clp, state);
4156 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4157 break;
4158 case -NFS4ERR_STALE_STATEID:
4159 if (new_lock_owner != 0 ||
4160 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4161 nfs4_state_mark_reclaim_reboot(clp, state);
4162 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4163 };
4164}
4165
afe6c27c 4166static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4167{
4168 struct nfs4_lockdata *data;
4169 struct rpc_task *task;
5138fde0
TM		 4170 struct rpc_message msg = {
4171 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4172 .rpc_cred = state->owner->so_cred,
4173 };
c970aa85
TM		 4174 struct rpc_task_setup task_setup_data = {
4175 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4176 .rpc_message = &msg,
c970aa85 4177 .callback_ops = &nfs4_lock_ops,
101070ca 4178 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4179 .flags = RPC_TASK_ASYNC,
4180 };
a5d16a4d
TM		 4181 int ret;
4182
3110ff80 4183 dprintk("%s: begin!\n", __func__);
cd3758e3 4184 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4185 fl->fl_u.nfs4_fl.owner,
4186 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4187 if (data == NULL)
4188 return -ENOMEM;
4189 if (IS_SETLKW(cmd))
4190 data->arg.block = 1;
b257957e
AB		 4191 if (recovery_type > NFS_LOCK_NEW) {
4192 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4193 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4194 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4195 }
5138fde0
TM		 4196 msg.rpc_argp = &data->arg,
4197 msg.rpc_resp = &data->res,
c970aa85
TM		 4198 task_setup_data.callback_data = data;
4199 task = rpc_run_task(&task_setup_data);
7a1218a2 4200 if (IS_ERR(task))
a5d16a4d 4201 return PTR_ERR(task);
a5d16a4d
TM		 4202 ret = nfs4_wait_for_completion_rpc_task(task);
4203 if (ret == 0) {
4204 ret = data->rpc_status;
2bee72a6
TM		 4205 if (ret)
4206 nfs4_handle_setlk_error(data->server, data->lsp,
4207 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4208 } else
4209 data->cancelled = 1;
e6b3c4db 4210 rpc_put_task(task);
3110ff80 4211 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4212 return ret;
1da177e4
LT		 4213}
4214
4215static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4216{
202b50dc
TM		 4217 struct nfs_server *server = NFS_SERVER(state->inode);
4218 struct nfs4_exception exception = { };
4219 int err;
4220
4221 do {
42a2d13e
TM		 4222 /* Cache the lock if possible... */
4223 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4224 return 0;
afe6c27c 4225 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4226 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4227 break;
4228 nfs4_handle_exception(server, err, &exception);
4229 } while (exception.retry);
4230 return err;
1da177e4
LT		 4231}
4232
4233static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4234{
202b50dc
TM		 4235 struct nfs_server *server = NFS_SERVER(state->inode);
4236 struct nfs4_exception exception = { };
4237 int err;
4238
6bfc93ef
TM		 4239 err = nfs4_set_lock_state(state, request);
4240 if (err != 0)
4241 return err;
202b50dc 4242 do {
42a2d13e
TM		 4243 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4244 return 0;
afe6c27c 4245 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4246 switch (err) {
4247 default:
4248 goto out;
4249 case -NFS4ERR_GRACE:
4250 case -NFS4ERR_DELAY:
2c643488 4251 case -EKEYEXPIRED:
a9ed2e25
TM		 4252 nfs4_handle_exception(server, err, &exception);
4253 err = 0;
4254 }
202b50dc 4255 } while (exception.retry);
a9ed2e25 4256out:
202b50dc 4257 return err;
1da177e4
LT		 4258}
4259
4260static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4261{
19e03c57 4262 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4263 unsigned char fl_flags = request->fl_flags;
8e469ebd 4264 int status = -ENOLCK;
1da177e4 4265
8e469ebd
TM		 4266 if ((fl_flags & FL_POSIX) &&
4267 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4268 goto out;
6bfc93ef 4269 /* Is this a delegated open? */
6bfc93ef
TM		 4270 status = nfs4_set_lock_state(state, request);
4271 if (status != 0)
4272 goto out;
01c3b861
TM		 4273 request->fl_flags |= FL_ACCESS;
4274 status = do_vfs_lock(request->fl_file, request);
4275 if (status < 0)
4276 goto out;
19e03c57 4277 down_read(&nfsi->rwsem);
01c3b861 4278 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4279 /* Yes: cache locks! */
01c3b861 4280 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4281 request->fl_flags = fl_flags & ~FL_SLEEP;
4282 status = do_vfs_lock(request->fl_file, request);
4283 goto out_unlock;
01c3b861 4284 }
afe6c27c 4285 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4286 if (status != 0)
01c3b861 4287 goto out_unlock;
6bfc93ef 4288 /* Note: we always want to sleep here! */
01c3b861 4289 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4290 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4291 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4292out_unlock:
19e03c57 4293 up_read(&nfsi->rwsem);
01c3b861
TM		 4294out:
4295 request->fl_flags = fl_flags;
1da177e4
LT		 4296 return status;
4297}
4298
4299static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4300{
4301 struct nfs4_exception exception = { };
4302 int err;
4303
4304 do {
965b5d67
TM		 4305 err = _nfs4_proc_setlk(state, cmd, request);
4306 if (err == -NFS4ERR_DENIED)
4307 err = -EAGAIN;
1da177e4 4308 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4309 err, &exception);
1da177e4
LT		 4310 } while (exception.retry);
4311 return err;
4312}
4313
4314static int
4315nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4316{
4317 struct nfs_open_context *ctx;
4318 struct nfs4_state *state;
4319 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4320 int status;
4321
4322 /* verify open state */
cd3758e3 4323 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4324 state = ctx->state;
4325
4326 if (request->fl_start < 0 || request->fl_end < 0)
4327 return -EINVAL;
4328
d953126a
TM		 4329 if (IS_GETLK(cmd)) {
4330 if (state != NULL)
4331 return nfs4_proc_getlk(state, F_GETLK, request);
4332 return 0;
4333 }
1da177e4
LT		 4334
4335 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4336 return -EINVAL;
4337
d953126a
TM		 4338 if (request->fl_type == F_UNLCK) {
4339 if (state != NULL)
4340 return nfs4_proc_unlck(state, cmd, request);
4341 return 0;
4342 }
1da177e4 4343
d953126a
TM		 4344 if (state == NULL)
4345 return -ENOLCK;
1da177e4
LT		 4346 do {
4347 status = nfs4_proc_setlk(state, cmd, request);
4348 if ((status != -EAGAIN) || IS_SETLK(cmd))
4349 break;
4350 timeout = nfs4_set_lock_task_retry(timeout);
4351 status = -ERESTARTSYS;
4352 if (signalled())
4353 break;
4354 } while(status < 0);
1da177e4
LT		 4355 return status;
4356}
4357
888e694c
TM		 4358int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4359{
4360 struct nfs_server *server = NFS_SERVER(state->inode);
4361 struct nfs4_exception exception = { };
4362 int err;
4363
4364 err = nfs4_set_lock_state(state, fl);
4365 if (err != 0)
4366 goto out;
4367 do {
afe6c27c 4368 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4369 switch (err) {
4370 default:
4371 printk(KERN_ERR "%s: unhandled error %d.\n",
4372 __func__, err);
4373 case 0:
965b5d67 4374 case -ESTALE:
d5122201
TM		 4375 goto out;
4376 case -NFS4ERR_EXPIRED:
4377 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4378 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4379 case -NFS4ERR_BADSESSION:
4380 case -NFS4ERR_BADSLOT:
4381 case -NFS4ERR_BAD_HIGH_SLOT:
4382 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4383 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4384 nfs4_schedule_state_recovery(server->nfs_client);
4385 goto out;
965b5d67
TM		 4386 case -ERESTARTSYS:
4387 /*
4388 * The show must go on: exit, but mark the
4389 * stateid as needing recovery.
4390 */
4391 case -NFS4ERR_ADMIN_REVOKED:
4392 case -NFS4ERR_BAD_STATEID:
4393 case -NFS4ERR_OPENMODE:
4394 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4395 err = 0;
4396 goto out;
4397 case -ENOMEM:
4398 case -NFS4ERR_DENIED:
4399 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4400 err = 0;
4401 goto out;
d5122201 4402 case -NFS4ERR_DELAY:
2c643488 4403 case -EKEYEXPIRED:
d5122201
TM		 4404 break;
4405 }
888e694c
TM		 4406 err = nfs4_handle_exception(server, err, &exception);
4407 } while (exception.retry);
4408out:
4409 return err;
4410}
6b3b5496 4411
d3c7b7cc
TM		 4412static void nfs4_release_lockowner_release(void *calldata)
4413{
4414 kfree(calldata);
4415}
4416
4417const struct rpc_call_ops nfs4_release_lockowner_ops = {
4418 .rpc_release = nfs4_release_lockowner_release,
4419};
4420
4421void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4422{
4423 struct nfs_server *server = lsp->ls_state->owner->so_server;
4424 struct nfs_release_lockowner_args *args;
4425 struct rpc_message msg = {
4426 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4427 };
4428
4429 if (server->nfs_client->cl_mvops->minor_version != 0)
4430 return;
4431 args = kmalloc(sizeof(*args), GFP_NOFS);
4432 if (!args)
4433 return;
4434 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4435 args->lock_owner.id = lsp->ls_id.id;
4436 msg.rpc_argp = args;
4437 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4438}
4439
aa1870af
BF		 4440#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4441
6b3b5496
BF		 4442int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4443 size_t buflen, int flags)
4444{
4b580ee3
BF		 4445 struct inode *inode = dentry->d_inode;
4446
4447 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4448 return -EOPNOTSUPP;
4449
4b580ee3 4450 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4451}
4452
4453/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4454 * and that's what we'll do for e.g. user attributes that haven't been set.
4455 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4456 * attributes in kernel-managed attribute namespaces. */
4457ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4458 size_t buflen)
4459{
aa1870af
BF		 4460 struct inode *inode = dentry->d_inode;
4461
4462 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4463 return -EOPNOTSUPP;
4464
4465 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4466}
4467
4468ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4469{
aa1870af 4470 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4471
096455a2
BF		 4472 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4473 return 0;
6b3b5496
BF		 4474 if (buf && buflen < len)
4475 return -ERANGE;
4476 if (buf)
aa1870af
BF		 4477 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4478 return len;
6b3b5496
BF		 4479}
4480
69aaaae1
TM		 4481static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4482{
4483 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4484 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4485 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4486 return;
4487
4488 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4489 NFS_ATTR_FATTR_NLINK;
4490 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4491 fattr->nlink = 2;
4492}
4493
56659e99 4494int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4495 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4496{
4497 struct nfs_server *server = NFS_SERVER(dir);
4498 u32 bitmask[2] = {
361e624f
MN		 4499 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4500 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4501 };
4502 struct nfs4_fs_locations_arg args = {
4503 .dir_fh = NFS_FH(dir),
c228fd3a 4504 .name = name,
683b57b4
TM		 4505 .page = page,
4506 .bitmask = bitmask,
4507 };
22958463
BH		 4508 struct nfs4_fs_locations_res res = {
4509 .fs_locations = fs_locations,
4510 };
683b57b4
TM		 4511 struct rpc_message msg = {
4512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4513 .rpc_argp = &args,
22958463 4514 .rpc_resp = &res,
683b57b4
TM		 4515 };
4516 int status;
4517
3110ff80 4518 dprintk("%s: start\n", __func__);
c228fd3a 4519 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4520 fs_locations->server = server;
830b8e33 4521 fs_locations->nlocations = 0;
cccef3b9 4522 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4523 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4524 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4525 return status;
4526}
4527
557134a3 4528#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4529/*
4530 * nfs4_proc_exchange_id()
4531 *
4532 * Since the clientid has expired, all compounds using sessions
4533 * associated with the stale clientid will be returning
4534 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4535 * be in some phase of session reset.
4536 */
4d643d1d 4537int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4538{
4539 nfs4_verifier verifier;
4540 struct nfs41_exchange_id_args args = {
4541 .client = clp,
4542 .flags = clp->cl_exchange_flags,
4543 };
4544 struct nfs41_exchange_id_res res = {
4545 .client = clp,
4546 };
4547 int status;
4548 struct rpc_message msg = {
4549 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4550 .rpc_argp = &args,
4551 .rpc_resp = &res,
4552 .rpc_cred = cred,
4553 };
4554 __be32 *p;
4555
4556 dprintk("--> %s\n", __func__);
4557 BUG_ON(clp == NULL);
a7b72103 4558
7b183d0d
AB		 4559 /* Remove server-only flags */
4560 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4561
99fe60d0
BH		 4562 p = (u32 *)verifier.data;
4563 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4564 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4565 args.verifier = &verifier;
4566
4567 while (1) {
4568 args.id_len = scnprintf(args.id, sizeof(args.id),
4569 "%s/%s %u",
4570 clp->cl_ipaddr,
4571 rpc_peeraddr2str(clp->cl_rpcclient,
4572 RPC_DISPLAY_ADDR),
4573 clp->cl_id_uniquifier);
4574
4575 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4576
180b62a3 4577 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4578 break;
4579
4580 if (signalled())
4581 break;
4582
4583 if (++clp->cl_id_uniquifier == 0)
4584 break;
4585 }
4586
4587 dprintk("<-- %s status= %d\n", __func__, status);
4588 return status;
4589}
4590
2050f0cc
AA		 4591struct nfs4_get_lease_time_data {
4592 struct nfs4_get_lease_time_args *args;
4593 struct nfs4_get_lease_time_res *res;
4594 struct nfs_client *clp;
4595};
4596
4597static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4598 void *calldata)
4599{
4600 int ret;
4601 struct nfs4_get_lease_time_data *data =
4602 (struct nfs4_get_lease_time_data *)calldata;
4603
4604 dprintk("--> %s\n", __func__);
689cf5c1 4605 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4606 /* just setup sequence, do not trigger session recovery
4607 since we're invoked within one */
4608 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4609 &data->args->la_seq_args,
4610 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4611
4612 BUG_ON(ret == -EAGAIN);
4613 rpc_call_start(task);
4614 dprintk("<-- %s\n", __func__);
4615}
4616
4617/*
4618 * Called from nfs4_state_manager thread for session setup, so don't recover
4619 * from sequence operation or clientid errors.
4620 */
4621static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4622{
4623 struct nfs4_get_lease_time_data *data =
4624 (struct nfs4_get_lease_time_data *)calldata;
4625
4626 dprintk("--> %s\n", __func__);
14516c3a
TM		 4627 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4628 return;
2050f0cc
AA		 4629 switch (task->tk_status) {
4630 case -NFS4ERR_DELAY:
4631 case -NFS4ERR_GRACE:
2c643488 4632 case -EKEYEXPIRED:
2050f0cc
AA		 4633 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4634 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4635 task->tk_status = 0;
0110ee15 4636 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4637 return;
4638 }
2050f0cc
AA		 4639 dprintk("<-- %s\n", __func__);
4640}
4641
4642struct rpc_call_ops nfs4_get_lease_time_ops = {
4643 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4644 .rpc_call_done = nfs4_get_lease_time_done,
4645};
4646
4647int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4648{
4649 struct rpc_task *task;
4650 struct nfs4_get_lease_time_args args;
4651 struct nfs4_get_lease_time_res res = {
4652 .lr_fsinfo = fsinfo,
4653 };
4654 struct nfs4_get_lease_time_data data = {
4655 .args = &args,
4656 .res = &res,
4657 .clp = clp,
4658 };
4659 struct rpc_message msg = {
4660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4661 .rpc_argp = &args,
4662 .rpc_resp = &res,
4663 };
4664 struct rpc_task_setup task_setup = {
4665 .rpc_client = clp->cl_rpcclient,
4666 .rpc_message = &msg,
4667 .callback_ops = &nfs4_get_lease_time_ops,
4668 .callback_data = &data
4669 };
4670 int status;
4671
4672 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4673 dprintk("--> %s\n", __func__);
4674 task = rpc_run_task(&task_setup);
4675
4676 if (IS_ERR(task))
4677 status = PTR_ERR(task);
4678 else {
4679 status = task->tk_status;
4680 rpc_put_task(task);
4681 }
4682 dprintk("<-- %s return %d\n", __func__, status);
4683
4684 return status;
4685}
4686
b73dafa7
RL		 4687/*
4688 * Reset a slot table
4689 */
104aeba4
AA		 4690static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4691 int ivalue)
ac72b7b3 4692{
104aeba4 4693 struct nfs4_slot *new = NULL;
b73dafa7 4694 int i;
ac72b7b3
AA		 4695 int ret = 0;
4696
104aeba4
AA		 4697 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4698 max_reqs, tbl->max_slots);
ac72b7b3 4699
104aeba4
AA		 4700 /* Does the newly negotiated max_reqs match the existing slot table? */
4701 if (max_reqs != tbl->max_slots) {
4702 ret = -ENOMEM;
4703 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4704 GFP_NOFS);
104aeba4
AA		 4705 if (!new)
4706 goto out;
4707 ret = 0;
4708 kfree(tbl->slots);
ac72b7b3
AA		 4709 }
4710 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4711 if (new) {
4712 tbl->slots = new;
4713 tbl->max_slots = max_reqs;
4714 }
4715 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4716 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4717 spin_unlock(&tbl->slot_tbl_lock);
4718 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4719 tbl, tbl->slots, tbl->max_slots);
4720out:
4721 dprintk("<-- %s: return %d\n", __func__, ret);
4722 return ret;
4723}
4724
b73dafa7
RL		 4725/*
4726 * Reset the forechannel and backchannel slot tables
4727 */
4728static int nfs4_reset_slot_tables(struct nfs4_session *session)
4729{
4730 int status;
4731
4732 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4733 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4734 if (status)
4735 return status;
4736
4737 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4738 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4739 return status;
4740}
4741
f8625a6a
RL		 4742/* Destroy the slot table */
4743static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4744{
4745 if (session->fc_slot_table.slots != NULL) {
4746 kfree(session->fc_slot_table.slots);
4747 session->fc_slot_table.slots = NULL;
4748 }
4749 if (session->bc_slot_table.slots != NULL) {
4750 kfree(session->bc_slot_table.slots);
4751 session->bc_slot_table.slots = NULL;
4752 }
4753 return;
4754}
4755
fc931582
AA		 4756/*
4757 * Initialize slot table
4758 */
050047ce
RL		 4759static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4760 int max_slots, int ivalue)
fc931582 4761{
fc931582
AA		 4762 struct nfs4_slot *slot;
4763 int ret = -ENOMEM;
4764
4765 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4766
050047ce 4767 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4768
8535b2be 4769 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4770 if (!slot)
4771 goto out;
fc931582
AA		 4772 ret = 0;
4773
4774 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4775 tbl->max_slots = max_slots;
4776 tbl->slots = slot;
4777 tbl->highest_used_slotid = -1; /* no slot is currently used */
4778 spin_unlock(&tbl->slot_tbl_lock);
4779 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4780 tbl, tbl->slots, tbl->max_slots);
4781out:
4782 dprintk("<-- %s: return %d\n", __func__, ret);
4783 return ret;
fc931582
AA		 4784}
4785
050047ce
RL		 4786/*
4787 * Initialize the forechannel and backchannel tables
4788 */
4789static int nfs4_init_slot_tables(struct nfs4_session *session)
4790{
f26468fb
TM		 4791 struct nfs4_slot_table *tbl;
4792 int status = 0;
050047ce 4793
f26468fb
TM		 4794 tbl = &session->fc_slot_table;
4795 if (tbl->slots == NULL) {
4796 status = nfs4_init_slot_table(tbl,
4797 session->fc_attrs.max_reqs, 1);
4798 if (status)
4799 return status;
4800 }
050047ce 4801
f26468fb
TM		 4802 tbl = &session->bc_slot_table;
4803 if (tbl->slots == NULL) {
4804 status = nfs4_init_slot_table(tbl,
4805 session->bc_attrs.max_reqs, 0);
4806 if (status)
4807 nfs4_destroy_slot_tables(session);
4808 }
f8625a6a
RL		 4809
4810 return status;
557134a3
AA		 4811}
4812
4813struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4814{
4815 struct nfs4_session *session;
4816 struct nfs4_slot_table *tbl;
4817
8535b2be 4818 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4819 if (!session)
4820 return NULL;
76db6d95 4821
ea028ac9 4822 init_completion(&session->complete);
76db6d95 4823
557134a3 4824 tbl = &session->fc_slot_table;
9dfdf404 4825 tbl->highest_used_slotid = -1;
557134a3 4826 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4827 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4828
4829 tbl = &session->bc_slot_table;
9dfdf404 4830 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4831 spin_lock_init(&tbl->slot_tbl_lock);
4832 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4833
1055d76d
TM		 4834 session->session_state = 1<<NFS4_SESSION_INITING;
4835
557134a3
AA		 4836 session->clp = clp;
4837 return session;
4838}
4839
4840void nfs4_destroy_session(struct nfs4_session *session)
4841{
5a0ffe54
AA		 4842 nfs4_proc_destroy_session(session);
4843 dprintk("%s Destroy backchannel for xprt %p\n",
4844 __func__, session->clp->cl_rpcclient->cl_xprt);
4845 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4846 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4847 nfs4_destroy_slot_tables(session);
557134a3
AA		 4848 kfree(session);
4849}
4850
fc931582
AA		 4851/*
4852 * Initialize the values to be used by the client in CREATE_SESSION
4853 * If nfs4_init_session set the fore channel request and response sizes,
4854 * use them.
4855 *
4856 * Set the back channel max_resp_sz_cached to zero to force the client to
4857 * always set csa_cachethis to FALSE because the current implementation
4858 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4859 */
4860static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4861{
4862 struct nfs4_session *session = args->client->cl_session;
4863 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4864 mxresp_sz = session->fc_attrs.max_resp_sz;
4865
4866 if (mxrqst_sz == 0)
4867 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4868 if (mxresp_sz == 0)
4869 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4870 /* Fore channel attributes */
4871 args->fc_attrs.headerpadsz = 0;
4872 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4873 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4874 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4875 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4876
4877 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4878 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4879 __func__,
4880 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4881 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4882
4883 /* Back channel attributes */
4884 args->bc_attrs.headerpadsz = 0;
4885 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4886 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4887 args->bc_attrs.max_resp_sz_cached = 0;
4888 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4889 args->bc_attrs.max_reqs = 1;
4890
4891 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4892 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4893 __func__,
4894 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4895 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4896 args->bc_attrs.max_reqs);
4897}
4898
8d35301d
AA		 4899static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4900{
4901 if (rcvd <= sent)
4902 return 0;
4903 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4904 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4905 return -EINVAL;
4906}
4907
4908#define _verify_fore_channel_attr(_name_) \
4909 _verify_channel_attr("fore", #_name_, \
4910 args->fc_attrs._name_, \
4911 session->fc_attrs._name_)
4912
4913#define _verify_back_channel_attr(_name_) \
4914 _verify_channel_attr("back", #_name_, \
4915 args->bc_attrs._name_, \
4916 session->bc_attrs._name_)
4917
4918/*
4919 * The server is not allowed to increase the fore channel header pad size,
4920 * maximum response size, or maximum number of operations.
4921 *
4922 * The back channel attributes are only negotiatied down: We send what the
4923 * (back channel) server insists upon.
4924 */
4925static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4926 struct nfs4_session *session)
4927{
4928 int ret = 0;
4929
4930 ret |= _verify_fore_channel_attr(headerpadsz);
4931 ret |= _verify_fore_channel_attr(max_resp_sz);
4932 ret |= _verify_fore_channel_attr(max_ops);
4933
4934 ret |= _verify_back_channel_attr(headerpadsz);
4935 ret |= _verify_back_channel_attr(max_rqst_sz);
4936 ret |= _verify_back_channel_attr(max_resp_sz);
4937 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4938 ret |= _verify_back_channel_attr(max_ops);
4939 ret |= _verify_back_channel_attr(max_reqs);
4940
4941 return ret;
4942}
4943
fc931582
AA		 4944static int _nfs4_proc_create_session(struct nfs_client *clp)
4945{
4946 struct nfs4_session *session = clp->cl_session;
4947 struct nfs41_create_session_args args = {
4948 .client = clp,
4949 .cb_program = NFS4_CALLBACK,
4950 };
4951 struct nfs41_create_session_res res = {
4952 .client = clp,
4953 };
4954 struct rpc_message msg = {
4955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4956 .rpc_argp = &args,
4957 .rpc_resp = &res,
4958 };
4959 int status;
4960
4961 nfs4_init_channel_attrs(&args);
0f91421e 4962 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4963
4964 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4965
8d35301d
AA		 4966 if (!status)
4967 /* Verify the session's negotiated channel_attrs values */
4968 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4969 if (!status) {
4970 /* Increment the clientid slot sequence id */
4971 clp->cl_seqid++;
4972 }
4973
4974 return status;
4975}
4976
4977/*
4978 * Issues a CREATE_SESSION operation to the server.
4979 * It is the responsibility of the caller to verify the session is
4980 * expired before calling this routine.
4981 */
f26468fb 4982int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4983{
4984 int status;
4985 unsigned *ptr;
fc931582
AA		 4986 struct nfs4_session *session = clp->cl_session;
4987
4988 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4989
4990 status = _nfs4_proc_create_session(clp);
4991 if (status)
4992 goto out;
4993
f26468fb
TM		 4994 /* Init and reset the fore channel */
4995 status = nfs4_init_slot_tables(session);
4996 dprintk("slot table initialization returned %d\n", status);
4997 if (status)
4998 goto out;
4999 status = nfs4_reset_slot_tables(session);
5000 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5001 if (status)
5002 goto out;
5003
5004 ptr = (unsigned *)&session->sess_id.data[0];
5005 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5006 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5007out:
5008 dprintk("<-- %s\n", __func__);
5009 return status;
5010}
5011
0f3e66c6
AA		 5012/*
5013 * Issue the over-the-wire RPC DESTROY_SESSION.
5014 * The caller must serialize access to this routine.
5015 */
5016int nfs4_proc_destroy_session(struct nfs4_session *session)
5017{
5018 int status = 0;
5019 struct rpc_message msg;
5020
5021 dprintk("--> nfs4_proc_destroy_session\n");
5022
5023 /* session is still being setup */
5024 if (session->clp->cl_cons_state != NFS_CS_READY)
5025 return status;
5026
5027 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5028 msg.rpc_argp = session;
5029 msg.rpc_resp = NULL;
5030 msg.rpc_cred = NULL;
5031 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5032
5033 if (status)
5034 printk(KERN_WARNING
5035 "Got error %d from the server on DESTROY_SESSION. "
5036 "Session has been destroyed regardless...\n", status);
5037
5038 dprintk("<-- nfs4_proc_destroy_session\n");
5039 return status;
5040}
5041
fccba804
TM		 5042int nfs4_init_session(struct nfs_server *server)
5043{
5044 struct nfs_client *clp = server->nfs_client;
2449ea2e 5045 struct nfs4_session *session;
68bf05ef 5046 unsigned int rsize, wsize;
fccba804
TM		 5047 int ret;
5048
5049 if (!nfs4_has_session(clp))
5050 return 0;
5051
1055d76d
TM		 5052 session = clp->cl_session;
5053 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5054 return 0;
5055
68bf05ef
AA		 5056 rsize = server->rsize;
5057 if (rsize == 0)
5058 rsize = NFS_MAX_FILE_IO_SIZE;
5059 wsize = server->wsize;
5060 if (wsize == 0)
5061 wsize = NFS_MAX_FILE_IO_SIZE;
5062
68bf05ef
AA		 5063 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5064 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5065
fccba804
TM		 5066 ret = nfs4_recover_expired_lease(server);
5067 if (!ret)
5068 ret = nfs4_check_client_ready(clp);
5069 return ret;
5070}
5071
fc01cea9
AA		 5072/*
5073 * Renew the cl_session lease.
5074 */
d5f8d3fe
TM		 5075struct nfs4_sequence_data {
5076 struct nfs_client *clp;
5077 struct nfs4_sequence_args args;
5078 struct nfs4_sequence_res res;
5079};
5080
dc96aef9
AB		 5081static void nfs41_sequence_release(void *data)
5082{
d5f8d3fe
TM		 5083 struct nfs4_sequence_data *calldata = data;
5084 struct nfs_client *clp = calldata->clp;
dc96aef9 5085
7135840f
AB		 5086 if (atomic_read(&clp->cl_count) > 1)
5087 nfs4_schedule_state_renewal(clp);
5088 nfs_put_client(clp);
d5f8d3fe 5089 kfree(calldata);
dc96aef9
AB		 5090}
5091
aa5190d0
TM		 5092static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5093{
5094 switch(task->tk_status) {
5095 case -NFS4ERR_DELAY:
5096 case -EKEYEXPIRED:
5097 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5098 return -EAGAIN;
5099 default:
5100 nfs4_schedule_state_recovery(clp);
5101 }
5102 return 0;
5103}
5104
dc96aef9 5105static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5106{
d5f8d3fe
TM		 5107 struct nfs4_sequence_data *calldata = data;
5108 struct nfs_client *clp = calldata->clp;
fc01cea9 5109
14516c3a
TM		 5110 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5111 return;
fc01cea9
AA		 5112
5113 if (task->tk_status < 0) {
5114 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5115 if (atomic_read(&clp->cl_count) == 1)
5116 goto out;
fc01cea9 5117
aa5190d0
TM		 5118 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5119 rpc_restart_call_prepare(task);
fc01cea9
AA		 5120 return;
5121 }
5122 }
fc01cea9 5123 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5124out:
fc01cea9
AA		 5125 dprintk("<-- %s\n", __func__);
5126}
5127
5128static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5129{
d5f8d3fe
TM		 5130 struct nfs4_sequence_data *calldata = data;
5131 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5132 struct nfs4_sequence_args *args;
5133 struct nfs4_sequence_res *res;
5134
fc01cea9
AA		 5135 args = task->tk_msg.rpc_argp;
5136 res = task->tk_msg.rpc_resp;
5137
035168ab 5138 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5139 return;
5140 rpc_call_start(task);
5141}
5142
5143static const struct rpc_call_ops nfs41_sequence_ops = {
5144 .rpc_call_done = nfs41_sequence_call_done,
5145 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5146 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5147};
5148
71ac6da9 5149static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5150{
d5f8d3fe 5151 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5152 struct rpc_message msg = {
5153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5154 .rpc_cred = cred,
5155 };
71ac6da9
TM		 5156 struct rpc_task_setup task_setup_data = {
5157 .rpc_client = clp->cl_rpcclient,
5158 .rpc_message = &msg,
5159 .callback_ops = &nfs41_sequence_ops,
5160 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5161 };
fc01cea9 5162
7135840f 5163 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5164 return ERR_PTR(-EIO);
d5f8d3fe
TM		 5165 calldata = kmalloc(sizeof(*calldata), GFP_NOFS);
5166 if (calldata == NULL) {
7135840f 5167 nfs_put_client(clp);
71ac6da9 5168 return ERR_PTR(-ENOMEM);
fc01cea9 5169 }
d5f8d3fe
TM		 5170 calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5171 msg.rpc_argp = &calldata->args;
5172 msg.rpc_resp = &calldata->res;
5173 calldata->clp = clp;
71ac6da9 5174 task_setup_data.callback_data = calldata;
fc01cea9 5175
71ac6da9
TM		 5176 return rpc_run_task(&task_setup_data);
5177}
5178
5179static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5180{
5181 struct rpc_task *task;
5182 int ret = 0;
5183
5184 task = _nfs41_proc_sequence(clp, cred);
5185 if (IS_ERR(task))
5186 ret = PTR_ERR(task);
5187 else
5188 rpc_put_task(task);
5189 dprintk("<-- %s status=%d\n", __func__, ret);
5190 return ret;
5191}
5192
5193static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5194{
5195 struct rpc_task *task;
5196 int ret;
5197
5198 task = _nfs41_proc_sequence(clp, cred);
5199 if (IS_ERR(task)) {
5200 ret = PTR_ERR(task);
5201 goto out;
5202 }
5203 ret = rpc_wait_for_completion_task(task);
5204 if (!ret)
5205 ret = task->tk_status;
5206 rpc_put_task(task);
5207out:
5208 dprintk("<-- %s status=%d\n", __func__, ret);
5209 return ret;
fc01cea9
AA		 5210}
5211
fce5c838
RL		 5212struct nfs4_reclaim_complete_data {
5213 struct nfs_client *clp;
5214 struct nfs41_reclaim_complete_args arg;
5215 struct nfs41_reclaim_complete_res res;
5216};
5217
5218static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5219{
5220 struct nfs4_reclaim_complete_data *calldata = data;
5221
b257957e 5222 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5223 if (nfs41_setup_sequence(calldata->clp->cl_session,
5224 &calldata->arg.seq_args,
fce5c838
RL		 5225 &calldata->res.seq_res, 0, task))
5226 return;
5227
5228 rpc_call_start(task);
5229}
5230
aa5190d0
TM		 5231static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5232{
5233 switch(task->tk_status) {
5234 case 0:
5235 case -NFS4ERR_COMPLETE_ALREADY:
5236 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5237 break;
5238 case -NFS4ERR_DELAY:
5239 case -EKEYEXPIRED:
5240 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5241 return -EAGAIN;
5242 default:
5243 nfs4_schedule_state_recovery(clp);
5244 }
5245 return 0;
5246}
5247
fce5c838
RL		 5248static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5249{
5250 struct nfs4_reclaim_complete_data *calldata = data;
5251 struct nfs_client *clp = calldata->clp;
5252 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5253
5254 dprintk("--> %s\n", __func__);
14516c3a
TM		 5255 if (!nfs41_sequence_done(task, res))
5256 return;
fce5c838 5257
aa5190d0
TM		 5258 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5259 rpc_restart_call_prepare(task);
5260 return;
5261 }
fce5c838
RL		 5262 dprintk("<-- %s\n", __func__);
5263}
5264
5265static void nfs4_free_reclaim_complete_data(void *data)
5266{
5267 struct nfs4_reclaim_complete_data *calldata = data;
5268
5269 kfree(calldata);
5270}
5271
5272static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5273 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5274 .rpc_call_done = nfs4_reclaim_complete_done,
5275 .rpc_release = nfs4_free_reclaim_complete_data,
5276};
5277
5278/*
5279 * Issue a global reclaim complete.
5280 */
5281static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5282{
5283 struct nfs4_reclaim_complete_data *calldata;
5284 struct rpc_task *task;
5285 struct rpc_message msg = {
5286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5287 };
5288 struct rpc_task_setup task_setup_data = {
5289 .rpc_client = clp->cl_rpcclient,
5290 .rpc_message = &msg,
5291 .callback_ops = &nfs4_reclaim_complete_call_ops,
5292 .flags = RPC_TASK_ASYNC,
5293 };
5294 int status = -ENOMEM;
5295
5296 dprintk("--> %s\n", __func__);
8535b2be 5297 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5298 if (calldata == NULL)
5299 goto out;
5300 calldata->clp = clp;
5301 calldata->arg.one_fs = 0;
5302 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5303
5304 msg.rpc_argp = &calldata->arg;
5305 msg.rpc_resp = &calldata->res;
5306 task_setup_data.callback_data = calldata;
5307 task = rpc_run_task(&task_setup_data);
acf82b85 5308 if (IS_ERR(task)) {
fce5c838 5309 status = PTR_ERR(task);
acf82b85
DC		 5310 goto out;
5311 }
fce5c838 5312 rpc_put_task(task);
acf82b85 5313 return 0;
fce5c838
RL		 5314out:
5315 dprintk("<-- %s status=%d\n", __func__, status);
5316 return status;
5317}
557134a3
AA		 5318#endif /* CONFIG_NFS_V4_1 */
5319
591d71cb 5320struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5321 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5322 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5323 .recover_open = nfs4_open_reclaim,
5324 .recover_lock = nfs4_lock_reclaim,
591d71cb 5325 .establish_clid = nfs4_init_clientid,
90a16617 5326 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5327};
5328
591d71cb
AA		 5329#if defined(CONFIG_NFS_V4_1)
5330struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5331 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5332 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5333 .recover_open = nfs4_open_reclaim,
5334 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5335 .establish_clid = nfs41_init_clientid,
b4b82607 5336 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5337 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5338};
5339#endif /* CONFIG_NFS_V4_1 */
5340
5341struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5342 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5343 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5344 .recover_open = nfs4_open_expired,
5345 .recover_lock = nfs4_lock_expired,
5346 .establish_clid = nfs4_init_clientid,
90a16617 5347 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5348};
5349
5350#if defined(CONFIG_NFS_V4_1)
5351struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5352 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5353 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5354 .recover_open = nfs4_open_expired,
5355 .recover_lock = nfs4_lock_expired,
4d643d1d 5356 .establish_clid = nfs41_init_clientid,
b4b82607 5357 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5358};
591d71cb 5359#endif /* CONFIG_NFS_V4_1 */
1da177e4 5360
29fba38b
BH		 5361struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5362 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5363 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5364 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5365};
5366
5367#if defined(CONFIG_NFS_V4_1)
5368struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5369 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5370 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5371 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5372};
5373#endif
5374
97dc1359
TM		 5375static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5376 .minor_version = 0,
5377 .call_sync = _nfs4_call_sync,
e047a10c 5378 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5379 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5380 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5381 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5382};
5383
5384#if defined(CONFIG_NFS_V4_1)
5385static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5386 .minor_version = 1,
5387 .call_sync = _nfs4_call_sync_session,
e047a10c 5388 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5389 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5390 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5391 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5392};
5393#endif
5394
97dc1359
TM		 5395const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5396 [0] = &nfs_v4_0_minor_ops,
5397#if defined(CONFIG_NFS_V4_1)
5398 [1] = &nfs_v4_1_minor_ops,
5399#endif
5400};
5401
92e1d5be 5402static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5403 .permission = nfs_permission,
5404 .getattr = nfs_getattr,
5405 .setattr = nfs_setattr,
5406 .getxattr = nfs4_getxattr,
5407 .setxattr = nfs4_setxattr,
5408 .listxattr = nfs4_listxattr,
5409};
5410
509de811 5411const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5412 .version = 4, /* protocol version */
5413 .dentry_ops = &nfs4_dentry_operations,
5414 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5415 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5416 .getroot = nfs4_proc_get_root,
5417 .getattr = nfs4_proc_getattr,
5418 .setattr = nfs4_proc_setattr,
2b3de441 5419 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5420 .lookup = nfs4_proc_lookup,
5421 .access = nfs4_proc_access,
5422 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5423 .create = nfs4_proc_create,
5424 .remove = nfs4_proc_remove,
5425 .unlink_setup = nfs4_proc_unlink_setup,
5426 .unlink_done = nfs4_proc_unlink_done,
5427 .rename = nfs4_proc_rename,
5428 .link = nfs4_proc_link,
5429 .symlink = nfs4_proc_symlink,
5430 .mkdir = nfs4_proc_mkdir,
5431 .rmdir = nfs4_proc_remove,
5432 .readdir = nfs4_proc_readdir,
5433 .mknod = nfs4_proc_mknod,
5434 .statfs = nfs4_proc_statfs,
5435 .fsinfo = nfs4_proc_fsinfo,
5436 .pathconf = nfs4_proc_pathconf,
e9326dca 5437 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5438 .decode_dirent = nfs4_decode_dirent,
5439 .read_setup = nfs4_proc_read_setup,
ec06c096 5440 .read_done = nfs4_read_done,
1da177e4 5441 .write_setup = nfs4_proc_write_setup,
788e7a89 5442 .write_done = nfs4_write_done,
1da177e4 5443 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5444 .commit_done = nfs4_commit_done,
1da177e4 5445 .lock = nfs4_proc_lock,
e50a1c2e 5446 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5447 .close_context = nfs4_close_context,
1da177e4
LT		 5448};
5449
5450/*
5451 * Local variables:
5452 * c-basic-offset: 8
5453 * End:
5454 */
Linux 6.x block layer and io_uring tree(s)