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NFS: Avoid warnings when CONFIG_NFS_V4=n
[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>
42#include <linux/sunrpc/clnt.h>
43#include <linux/nfs.h>
44#include <linux/nfs4.h>
45#include <linux/nfs_fs.h>
46#include <linux/nfs_page.h>
1da177e4 47#include <linux/namei.h>
02a913a7 48#include <linux/mount.h>
99fe60d0 49#include <linux/module.h>
5a0ffe54 50#include <linux/sunrpc/bc_xprt.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
101070ca 54#include "internal.h"
006ea73e 55#include "iostat.h"
fc931582 56#include "callback.h"
1da177e4
LT		 57
58#define NFSDBG_FACILITY NFSDBG_PROC
59
2066fe89 60#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 61#define NFS4_POLL_RETRY_MAX (15*HZ)
62
a78cb57a
TM		 63#define NFS4_MAX_LOOP_ON_RECOVER (10)
64
cdd4e68b 65struct nfs4_opendata;
864472e9 66static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 67static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 68static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 69static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 70static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
71static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 72
1da177e4 73/* Prevent leaks of NFSv4 errors into userland */
46f72f57 74static int nfs4_map_errors(int err)
1da177e4 75{
52567b03
TM		 76 if (err >= -1000)
77 return err;
78 switch (err) {
79 case -NFS4ERR_RESOURCE:
80 return -EREMOTEIO;
81 default:
1da177e4 82 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 83 __func__, -err);
52567b03 84 break;
1da177e4 85 }
52567b03 86 return -EIO;
1da177e4
LT		 87}
88
89/*
90 * This is our standard bitmap for GETATTR requests.
91 */
92const u32 nfs4_fattr_bitmap[2] = {
93 FATTR4_WORD0_TYPE
94 | FATTR4_WORD0_CHANGE
95 | FATTR4_WORD0_SIZE
96 | FATTR4_WORD0_FSID
97 | FATTR4_WORD0_FILEID,
98 FATTR4_WORD1_MODE
99 | FATTR4_WORD1_NUMLINKS
100 | FATTR4_WORD1_OWNER
101 | FATTR4_WORD1_OWNER_GROUP
102 | FATTR4_WORD1_RAWDEV
103 | FATTR4_WORD1_SPACE_USED
104 | FATTR4_WORD1_TIME_ACCESS
105 | FATTR4_WORD1_TIME_METADATA
106 | FATTR4_WORD1_TIME_MODIFY
107};
108
109const u32 nfs4_statfs_bitmap[2] = {
110 FATTR4_WORD0_FILES_AVAIL
111 | FATTR4_WORD0_FILES_FREE
112 | FATTR4_WORD0_FILES_TOTAL,
113 FATTR4_WORD1_SPACE_AVAIL
114 | FATTR4_WORD1_SPACE_FREE
115 | FATTR4_WORD1_SPACE_TOTAL
116};
117
4ce79717 118const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 119 FATTR4_WORD0_MAXLINK
120 | FATTR4_WORD0_MAXNAME,
121 0
122};
123
124const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
125 | FATTR4_WORD0_MAXREAD
126 | FATTR4_WORD0_MAXWRITE
127 | FATTR4_WORD0_LEASE_TIME,
128 0
129};
130
830b8e33
MN		 131const u32 nfs4_fs_locations_bitmap[2] = {
132 FATTR4_WORD0_TYPE
133 | FATTR4_WORD0_CHANGE
134 | FATTR4_WORD0_SIZE
135 | FATTR4_WORD0_FSID
136 | FATTR4_WORD0_FILEID
137 | FATTR4_WORD0_FS_LOCATIONS,
138 FATTR4_WORD1_MODE
139 | FATTR4_WORD1_NUMLINKS
140 | FATTR4_WORD1_OWNER
141 | FATTR4_WORD1_OWNER_GROUP
142 | FATTR4_WORD1_RAWDEV
143 | FATTR4_WORD1_SPACE_USED
144 | FATTR4_WORD1_TIME_ACCESS
145 | FATTR4_WORD1_TIME_METADATA
146 | FATTR4_WORD1_TIME_MODIFY
147 | FATTR4_WORD1_MOUNTED_ON_FILEID
148};
149
bc4785cd 150static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 151 struct nfs4_readdir_arg *readdir)
152{
0dbb4c67 153 __be32 *start, *p;
1da177e4
LT		 154
155 BUG_ON(readdir->count < 80);
156 if (cookie > 2) {
b7ef1956 157 readdir->cookie = cookie;
1da177e4
LT		 158 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
159 return;
160 }
161
162 readdir->cookie = 0;
163 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
164 if (cookie == 2)
165 return;
166
167 /*
168 * NFSv4 servers do not return entries for '.' and '..'
169 * Therefore, we fake these entries here. We let '.'
170 * have cookie 0 and '..' have cookie 1. Note that
171 * when talking to the server, we always send cookie 0
172 * instead of 1 or 2.
173 */
0dbb4c67 174 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 175
176 if (cookie == 0) {
177 *p++ = xdr_one; /* next */
178 *p++ = xdr_zero; /* cookie, first word */
179 *p++ = xdr_one; /* cookie, second word */
180 *p++ = xdr_one; /* entry len */
181 memcpy(p, ".\0\0\0", 4); /* entry */
182 p++;
183 *p++ = xdr_one; /* bitmap length */
184 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
185 *p++ = htonl(8); /* attribute buffer length */
4e769b93 186 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 187 }
188
189 *p++ = xdr_one; /* next */
190 *p++ = xdr_zero; /* cookie, first word */
191 *p++ = xdr_two; /* cookie, second word */
192 *p++ = xdr_two; /* entry len */
193 memcpy(p, "..\0\0", 4); /* entry */
194 p++;
195 *p++ = xdr_one; /* bitmap length */
196 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
197 *p++ = htonl(8); /* attribute buffer length */
4e769b93 198 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 199
200 readdir->pgbase = (char *)p - (char *)start;
201 readdir->count -= readdir->pgbase;
202 kunmap_atomic(start, KM_USER0);
203}
204
65de872e
TM		 205static int nfs4_wait_clnt_recover(struct nfs_client *clp)
206{
207 int res;
208
209 might_sleep();
210
e005e804 211 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 212 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 213 return res;
214}
215
216static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
217{
218 int res = 0;
219
220 might_sleep();
221
222 if (*timeout <= 0)
223 *timeout = NFS4_POLL_RETRY_MIN;
224 if (*timeout > NFS4_POLL_RETRY_MAX)
225 *timeout = NFS4_POLL_RETRY_MAX;
226 schedule_timeout_killable(*timeout);
227 if (fatal_signal_pending(current))
228 res = -ERESTARTSYS;
229 *timeout <<= 1;
230 return res;
231}
232
233/* This is the error handling routine for processes that are allowed
234 * to sleep.
235 */
236static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
237{
238 struct nfs_client *clp = server->nfs_client;
9e33bed5 239 struct nfs4_state *state = exception->state;
65de872e
TM		 240 int ret = errorcode;
241
242 exception->retry = 0;
243 switch(errorcode) {
244 case 0:
245 return 0;
9e33bed5
TM		 246 case -NFS4ERR_ADMIN_REVOKED:
247 case -NFS4ERR_BAD_STATEID:
248 case -NFS4ERR_OPENMODE:
249 if (state == NULL)
250 break;
251 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 252 case -NFS4ERR_STALE_CLIENTID:
253 case -NFS4ERR_STALE_STATEID:
254 case -NFS4ERR_EXPIRED:
255 nfs4_schedule_state_recovery(clp);
256 ret = nfs4_wait_clnt_recover(clp);
257 if (ret == 0)
258 exception->retry = 1;
4745e315 259#if !defined(CONFIG_NFS_V4_1)
65de872e 260 break;
4745e315
AA		 261#else /* !defined(CONFIG_NFS_V4_1) */
262 if (!nfs4_has_session(server->nfs_client))
263 break;
264 /* FALLTHROUGH */
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;
4745e315 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:
288 ret = nfs4_delay(server->client, &exception->timeout);
289 if (ret != 0)
290 break;
291 case -NFS4ERR_OLD_STATEID:
292 exception->retry = 1;
293 }
294 /* We failed to handle the error */
295 return nfs4_map_errors(ret);
296}
297
298
26e976a8 299static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 300{
7539bbab 301 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 302 spin_lock(&clp->cl_lock);
303 if (time_before(clp->cl_last_renewal,timestamp))
304 clp->cl_last_renewal = timestamp;
305 spin_unlock(&clp->cl_lock);
306}
307
cccef3b9
AA		 308#if defined(CONFIG_NFS_V4_1)
309
e2c4ab3c
AA		 310/*
311 * nfs4_free_slot - free a slot and efficiently update slot table.
312 *
313 * freeing a slot is trivially done by clearing its respective bit
314 * in the bitmap.
315 * If the freed slotid equals highest_used_slotid we want to update it
316 * so that the server would be able to size down the slot table if needed,
317 * otherwise we know that the highest_used_slotid is still in use.
318 * When updating highest_used_slotid there may be "holes" in the bitmap
319 * so we need to scan down from highest_used_slotid to 0 looking for the now
320 * highest slotid in use.
321 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 322 *
323 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 324 */
325static void
326nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
327{
328 int slotid = free_slotid;
329
e2c4ab3c
AA		 330 /* clear used bit in bitmap */
331 __clear_bit(slotid, tbl->used_slots);
332
333 /* update highest_used_slotid when it is freed */
334 if (slotid == tbl->highest_used_slotid) {
335 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 336 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 337 tbl->highest_used_slotid = slotid;
338 else
339 tbl->highest_used_slotid = -1;
340 }
e2c4ab3c
AA		 341 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
342 free_slotid, tbl->highest_used_slotid);
343}
344
3bfb0fc5
AB		 345/*
346 * Signal state manager thread if session is drained
347 */
348static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
349{
689cf5c1
AB		 350 struct rpc_task *task;
351
3bfb0fc5 352 if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
689cf5c1
AB		 353 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
354 if (task)
355 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 356 return;
357 }
358
359 if (ses->fc_slot_table.highest_used_slotid != -1)
360 return;
361
362 dprintk("%s COMPLETE: Session Drained\n", __func__);
363 complete(&ses->complete);
364}
365
d61e612a 366static void nfs41_sequence_free_slot(const struct nfs_client *clp,
13615871
AA		 367 struct nfs4_sequence_res *res)
368{
369 struct nfs4_slot_table *tbl;
370
13615871
AA		 371 tbl = &clp->cl_session->fc_slot_table;
372 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 373 /* just wake up the next guy waiting since
374 * we may have not consumed a slot after all */
691daf3b 375 dprintk("%s: No slot\n", __func__);
35dc1d74 376 return;
13615871 377 }
ea028ac9 378
35dc1d74
TM		 379 spin_lock(&tbl->slot_tbl_lock);
380 nfs4_free_slot(tbl, res->sr_slotid);
3bfb0fc5 381 nfs41_check_drain_session_complete(clp->cl_session);
35dc1d74
TM		 382 spin_unlock(&tbl->slot_tbl_lock);
383 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 384}
385
b0df806c
AA		 386static void nfs41_sequence_done(struct nfs_client *clp,
387 struct nfs4_sequence_res *res,
388 int rpc_status)
389{
390 unsigned long timestamp;
391 struct nfs4_slot_table *tbl;
392 struct nfs4_slot *slot;
393
394 /*
395 * sr_status remains 1 if an RPC level error occurred. The server
396 * may or may not have processed the sequence operation..
397 * Proceed as if the server received and processed the sequence
398 * operation.
399 */
400 if (res->sr_status == 1)
401 res->sr_status = NFS_OK;
402
403 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
404 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
405 goto out;
406
691daf3b 407 /* Check the SEQUENCE operation status */
b0df806c 408 if (res->sr_status == 0) {
691daf3b
AA		 409 tbl = &clp->cl_session->fc_slot_table;
410 slot = tbl->slots + res->sr_slotid;
b0df806c
AA		 411 /* Update the slot's sequence and clientid lease timer */
412 ++slot->seq_nr;
413 timestamp = res->sr_renewal_time;
414 spin_lock(&clp->cl_lock);
415 if (time_before(clp->cl_last_renewal, timestamp))
416 clp->cl_last_renewal = timestamp;
417 spin_unlock(&clp->cl_lock);
0629e370
AB		 418 /* Check sequence flags */
419 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
b0df806c
AA		 420 }
421out:
422 /* The session may be reset by one of the error handlers. */
423 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
424 nfs41_sequence_free_slot(clp, res);
425}
426
510b8175
BH		 427/*
428 * nfs4_find_slot - efficiently look for a free slot
429 *
430 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
431 * If found, we mark the slot as used, update the highest_used_slotid,
432 * and respectively set up the sequence operation args.
433 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 434 *
435 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 436 */
437static u8
40ead580 438nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 439{
440 int slotid;
441 u8 ret_id = NFS4_MAX_SLOT_TABLE;
442 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
443
510b8175
BH		 444 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
445 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
446 tbl->max_slots);
447 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
448 if (slotid >= tbl->max_slots)
449 goto out;
450 __set_bit(slotid, tbl->used_slots);
451 if (slotid > tbl->highest_used_slotid)
452 tbl->highest_used_slotid = slotid;
453 ret_id = slotid;
454out:
455 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
456 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 457 return ret_id;
458}
459
ce5039c1
AA		 460static int nfs41_setup_sequence(struct nfs4_session *session,
461 struct nfs4_sequence_args *args,
462 struct nfs4_sequence_res *res,
463 int cache_reply,
464 struct rpc_task *task)
465{
fbcd4abc
AA		 466 struct nfs4_slot *slot;
467 struct nfs4_slot_table *tbl;
468 u8 slotid;
469
470 dprintk("--> %s\n", __func__);
ce5039c1
AA		 471 /* slot already allocated? */
472 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
473 return 0;
474
475 memset(res, 0, sizeof(*res));
476 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 477 tbl = &session->fc_slot_table;
478
479 spin_lock(&tbl->slot_tbl_lock);
5601a00d
AB		 480 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
481 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 482 /*
483 * The state manager will wait until the slot table is empty.
484 * Schedule the reset thread
485 */
05f0d236 486 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 487 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 488 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 489 return -EAGAIN;
b069d94a
AA		 490 }
491
689cf5c1
AB		 492 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
493 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
494 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
495 spin_unlock(&tbl->slot_tbl_lock);
496 dprintk("%s enforce FIFO order\n", __func__);
497 return -EAGAIN;
498 }
499
40ead580 500 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 501 if (slotid == NFS4_MAX_SLOT_TABLE) {
502 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
503 spin_unlock(&tbl->slot_tbl_lock);
504 dprintk("<-- %s: no free slots\n", __func__);
505 return -EAGAIN;
506 }
507 spin_unlock(&tbl->slot_tbl_lock);
508
689cf5c1 509 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 510 slot = tbl->slots + slotid;
99fe60d0 511 args->sa_session = session;
fbcd4abc
AA		 512 args->sa_slotid = slotid;
513 args->sa_cache_this = cache_reply;
514
515 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
516
99fe60d0 517 res->sr_session = session;
fbcd4abc
AA		 518 res->sr_slotid = slotid;
519 res->sr_renewal_time = jiffies;
520 /*
521 * sr_status is only set in decode_sequence, and so will remain
522 * set to 1 if an rpc level failure occurs.
523 */
524 res->sr_status = 1;
ce5039c1
AA		 525 return 0;
526}
527
528int nfs4_setup_sequence(struct nfs_client *clp,
529 struct nfs4_sequence_args *args,
530 struct nfs4_sequence_res *res,
531 int cache_reply,
532 struct rpc_task *task)
533{
534 int ret = 0;
535
536 dprintk("--> %s clp %p session %p sr_slotid %d\n",
537 __func__, clp, clp->cl_session, res->sr_slotid);
538
539 if (!nfs4_has_session(clp))
540 goto out;
541 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
542 task);
2628eddf 543 if (ret && ret != -EAGAIN) {
ce5039c1
AA		 544 /* terminate rpc task */
545 task->tk_status = ret;
546 task->tk_action = NULL;
547 }
548out:
549 dprintk("<-- %s status=%d\n", __func__, ret);
550 return ret;
551}
552
553struct nfs41_call_sync_data {
554 struct nfs_client *clp;
555 struct nfs4_sequence_args *seq_args;
556 struct nfs4_sequence_res *seq_res;
557 int cache_reply;
558};
559
560static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
561{
562 struct nfs41_call_sync_data *data = calldata;
563
564 dprintk("--> %s data->clp->cl_session %p\n", __func__,
565 data->clp->cl_session);
566 if (nfs4_setup_sequence(data->clp, data->seq_args,
567 data->seq_res, data->cache_reply, task))
568 return;
569 rpc_call_start(task);
570}
571
b257957e
AB		 572static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
573{
574 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
575 nfs41_call_sync_prepare(task, calldata);
576}
577
69ab40c4
AA		 578static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
579{
580 struct nfs41_call_sync_data *data = calldata;
581
582 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
69ab40c4
AA		 583}
584
ce5039c1
AA		 585struct rpc_call_ops nfs41_call_sync_ops = {
586 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 587 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 588};
589
b257957e
AB		 590struct rpc_call_ops nfs41_call_priv_sync_ops = {
591 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
592 .rpc_call_done = nfs41_call_sync_done,
593};
594
ce5039c1
AA		 595static int nfs4_call_sync_sequence(struct nfs_client *clp,
596 struct rpc_clnt *clnt,
597 struct rpc_message *msg,
598 struct nfs4_sequence_args *args,
599 struct nfs4_sequence_res *res,
b257957e
AB		 600 int cache_reply,
601 int privileged)
ce5039c1
AA		 602{
603 int ret;
604 struct rpc_task *task;
605 struct nfs41_call_sync_data data = {
606 .clp = clp,
607 .seq_args = args,
608 .seq_res = res,
609 .cache_reply = cache_reply,
610 };
611 struct rpc_task_setup task_setup = {
612 .rpc_client = clnt,
613 .rpc_message = msg,
614 .callback_ops = &nfs41_call_sync_ops,
615 .callback_data = &data
616 };
617
618 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 619 if (privileged)
620 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 621 task = rpc_run_task(&task_setup);
622 if (IS_ERR(task))
623 ret = PTR_ERR(task);
624 else {
625 ret = task->tk_status;
626 rpc_put_task(task);
627 }
628 return ret;
629}
630
cccef3b9
AA		 631int _nfs4_call_sync_session(struct nfs_server *server,
632 struct rpc_message *msg,
633 struct nfs4_sequence_args *args,
634 struct nfs4_sequence_res *res,
635 int cache_reply)
636{
ce5039c1 637 return nfs4_call_sync_sequence(server->nfs_client, server->client,
b257957e 638 msg, args, res, cache_reply, 0);
cccef3b9
AA		 639}
640
641#endif /* CONFIG_NFS_V4_1 */
642
643int _nfs4_call_sync(struct nfs_server *server,
644 struct rpc_message *msg,
645 struct nfs4_sequence_args *args,
646 struct nfs4_sequence_res *res,
647 int cache_reply)
648{
f3752975 649 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 650 return rpc_call_sync(server->client, msg, 0);
651}
652
653#define nfs4_call_sync(server, msg, args, res, cache_reply) \
654 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
655 &(res)->seq_res, (cache_reply))
656
b0df806c
AA		 657static void nfs4_sequence_done(const struct nfs_server *server,
658 struct nfs4_sequence_res *res, int rpc_status)
659{
660#ifdef CONFIG_NFS_V4_1
661 if (nfs4_has_session(server->nfs_client))
662 nfs41_sequence_done(server->nfs_client, res, rpc_status);
663#endif /* CONFIG_NFS_V4_1 */
664}
665
38478b24 666static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 667{
38478b24 668 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 669
38478b24 670 spin_lock(&dir->i_lock);
40d24704
TM		 671 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
672 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 673 nfs_force_lookup_revalidate(dir);
40d24704 674 nfsi->change_attr = cinfo->after;
38478b24 675 spin_unlock(&dir->i_lock);
1da177e4
LT		 676}
677
e56e0b78 678struct nfs4_opendata {
c6d00e63 679 struct kref kref;
e56e0b78
TM		 680 struct nfs_openargs o_arg;
681 struct nfs_openres o_res;
cdd4e68b
TM		 682 struct nfs_open_confirmargs c_arg;
683 struct nfs_open_confirmres c_res;
e56e0b78
TM		 684 struct nfs_fattr f_attr;
685 struct nfs_fattr dir_attr;
ad389da7 686 struct path path;
e56e0b78
TM		 687 struct dentry *dir;
688 struct nfs4_state_owner *owner;
aac00a8d 689 struct nfs4_state *state;
e56e0b78 690 struct iattr attrs;
26e976a8 691 unsigned long timestamp;
3e309914 692 unsigned int rpc_done : 1;
24ac23ab
TM		 693 int rpc_status;
694 int cancelled;
e56e0b78
TM		 695};
696
2ced46c2
TM		 697
698static void nfs4_init_opendata_res(struct nfs4_opendata *p)
699{
700 p->o_res.f_attr = &p->f_attr;
701 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 702 p->o_res.seqid = p->o_arg.seqid;
703 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 704 p->o_res.server = p->o_arg.server;
705 nfs_fattr_init(&p->f_attr);
706 nfs_fattr_init(&p->dir_attr);
578e4585 707 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 708}
709
ad389da7 710static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 711 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 712 const struct iattr *attrs)
713{
ad389da7 714 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 715 struct inode *dir = parent->d_inode;
716 struct nfs_server *server = NFS_SERVER(dir);
717 struct nfs4_opendata *p;
718
719 p = kzalloc(sizeof(*p), GFP_KERNEL);
720 if (p == NULL)
721 goto err;
722 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
723 if (p->o_arg.seqid == NULL)
724 goto err_free;
ad389da7
TM		 725 p->path.mnt = mntget(path->mnt);
726 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 727 p->dir = parent;
728 p->owner = sp;
729 atomic_inc(&sp->so_count);
730 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 731 p->o_arg.open_flags = flags;
732 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 733 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 734 p->o_arg.id = sp->so_owner_id.id;
ad389da7 735 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 736 p->o_arg.server = server;
737 p->o_arg.bitmask = server->attr_bitmask;
738 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78 739 if (flags & O_EXCL) {
4882ef72
AB		 740 if (nfs4_has_persistent_session(server->nfs_client)) {
741 /* GUARDED */
742 p->o_arg.u.attrs = &p->attrs;
743 memcpy(&p->attrs, attrs, sizeof(p->attrs));
744 } else { /* EXCLUSIVE4_1 */
745 u32 *s = (u32 *) p->o_arg.u.verifier.data;
746 s[0] = jiffies;
747 s[1] = current->pid;
748 }
e56e0b78
TM		 749 } else if (flags & O_CREAT) {
750 p->o_arg.u.attrs = &p->attrs;
751 memcpy(&p->attrs, attrs, sizeof(p->attrs));
752 }
cdd4e68b
TM		 753 p->c_arg.fh = &p->o_res.fh;
754 p->c_arg.stateid = &p->o_res.stateid;
755 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 756 nfs4_init_opendata_res(p);
c6d00e63 757 kref_init(&p->kref);
e56e0b78
TM		 758 return p;
759err_free:
760 kfree(p);
761err:
762 dput(parent);
763 return NULL;
764}
765
c6d00e63 766static void nfs4_opendata_free(struct kref *kref)
e56e0b78 767{
c6d00e63
TM		 768 struct nfs4_opendata *p = container_of(kref,
769 struct nfs4_opendata, kref);
770
771 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 772 if (p->state != NULL)
773 nfs4_put_open_state(p->state);
c6d00e63
TM		 774 nfs4_put_state_owner(p->owner);
775 dput(p->dir);
31f31db1 776 path_put(&p->path);
c6d00e63
TM		 777 kfree(p);
778}
779
780static void nfs4_opendata_put(struct nfs4_opendata *p)
781{
782 if (p != NULL)
783 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 784}
785
06f814a3
TM		 786static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
787{
06f814a3
TM		 788 int ret;
789
06f814a3 790 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 791 return ret;
792}
793
dc0b027d 794static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 795{
796 int ret = 0;
dc0b027d
TM		 797
798 if (open_mode & O_EXCL)
799 goto out;
800 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 801 case FMODE_READ:
88069f77
TM		 802 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
803 && state->n_rdonly != 0;
6ee41268
TM		 804 break;
805 case FMODE_WRITE:
88069f77
TM		 806 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
807 && state->n_wronly != 0;
6ee41268
TM		 808 break;
809 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 810 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
811 && state->n_rdwr != 0;
6ee41268 812 }
dc0b027d 813out:
6ee41268
TM		 814 return ret;
815}
816
dc0b027d 817static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 818{
dc0b027d 819 if ((delegation->type & fmode) != fmode)
aac00a8d 820 return 0;
15c831bf 821 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 822 return 0;
b7391f44 823 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 824 return 1;
825}
826
dc0b027d 827static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 828{
dc0b027d 829 switch (fmode) {
e7616923
TM		 830 case FMODE_WRITE:
831 state->n_wronly++;
832 break;
833 case FMODE_READ:
834 state->n_rdonly++;
835 break;
836 case FMODE_READ|FMODE_WRITE:
837 state->n_rdwr++;
838 }
dc0b027d 839 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 840}
841
dc0b027d 842static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 843{
844 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
845 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
846 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 847 switch (fmode) {
003707c7
TM		 848 case FMODE_READ:
849 set_bit(NFS_O_RDONLY_STATE, &state->flags);
850 break;
851 case FMODE_WRITE:
852 set_bit(NFS_O_WRONLY_STATE, &state->flags);
853 break;
854 case FMODE_READ|FMODE_WRITE:
855 set_bit(NFS_O_RDWR_STATE, &state->flags);
856 }
e7616923
TM		 857}
858
dc0b027d 859static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 860{
8bda4e4c 861 write_seqlock(&state->seqlock);
dc0b027d 862 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 863 write_sequnlock(&state->seqlock);
003707c7
TM		 864}
865
dc0b027d 866static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 867{
8bda4e4c
TM		 868 /*
869 * Protect the call to nfs4_state_set_mode_locked and
870 * serialise the stateid update
871 */
872 write_seqlock(&state->seqlock);
003707c7
TM		 873 if (deleg_stateid != NULL) {
874 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
875 set_bit(NFS_DELEGATED_STATE, &state->flags);
876 }
877 if (open_stateid != NULL)
dc0b027d 878 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 879 write_sequnlock(&state->seqlock);
880 spin_lock(&state->owner->so_lock);
dc0b027d 881 update_open_stateflags(state, fmode);
ec073428 882 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 883}
884
dc0b027d 885static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 886{
887 struct nfs_inode *nfsi = NFS_I(state->inode);
888 struct nfs_delegation *deleg_cur;
889 int ret = 0;
890
dc0b027d 891 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 892
893 rcu_read_lock();
894 deleg_cur = rcu_dereference(nfsi->delegation);
895 if (deleg_cur == NULL)
896 goto no_delegation;
897
898 spin_lock(&deleg_cur->lock);
899 if (nfsi->delegation != deleg_cur ||
dc0b027d 900 (deleg_cur->type & fmode) != fmode)
34310430
TM		 901 goto no_delegation_unlock;
902
903 if (delegation == NULL)
904 delegation = &deleg_cur->stateid;
905 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
906 goto no_delegation_unlock;
907
b7391f44 908 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 909 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 910 ret = 1;
911no_delegation_unlock:
912 spin_unlock(&deleg_cur->lock);
913no_delegation:
914 rcu_read_unlock();
915
916 if (!ret && open_stateid != NULL) {
dc0b027d 917 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 918 ret = 1;
919 }
920
921 return ret;
922}
923
924
dc0b027d 925static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 926{
927 struct nfs_delegation *delegation;
928
929 rcu_read_lock();
930 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 931 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 932 rcu_read_unlock();
933 return;
934 }
935 rcu_read_unlock();
936 nfs_inode_return_delegation(inode);
937}
938
6ee41268 939static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 940{
941 struct nfs4_state *state = opendata->state;
942 struct nfs_inode *nfsi = NFS_I(state->inode);
943 struct nfs_delegation *delegation;
dc0b027d
TM		 944 int open_mode = opendata->o_arg.open_flags & O_EXCL;
945 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 946 nfs4_stateid stateid;
947 int ret = -EAGAIN;
948
aac00a8d 949 for (;;) {
dc0b027d 950 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 951 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 952 if (can_open_cached(state, fmode, open_mode)) {
953 update_open_stateflags(state, fmode);
6ee41268 954 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 955 goto out_return_state;
956 }
957 spin_unlock(&state->owner->so_lock);
958 }
34310430
TM		 959 rcu_read_lock();
960 delegation = rcu_dereference(nfsi->delegation);
961 if (delegation == NULL ||
dc0b027d 962 !can_open_delegated(delegation, fmode)) {
34310430 963 rcu_read_unlock();
aac00a8d 964 break;
34310430 965 }
aac00a8d
TM		 966 /* Save the delegation */
967 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
968 rcu_read_unlock();
af22f94a 969 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 970 if (ret != 0)
971 goto out;
972 ret = -EAGAIN;
34310430
TM		 973
974 /* Try to update the stateid using the delegation */
dc0b027d 975 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 976 goto out_return_state;
aac00a8d 977 }
aac00a8d
TM		 978out:
979 return ERR_PTR(ret);
980out_return_state:
981 atomic_inc(&state->count);
982 return state;
983}
984
24ac23ab
TM		 985static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
986{
987 struct inode *inode;
988 struct nfs4_state *state = NULL;
003707c7 989 struct nfs_delegation *delegation;
1b370bc2 990 int ret;
24ac23ab 991
aac00a8d 992 if (!data->rpc_done) {
6ee41268 993 state = nfs4_try_open_cached(data);
aac00a8d
TM		 994 goto out;
995 }
996
1b370bc2 997 ret = -EAGAIN;
24ac23ab 998 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 999 goto err;
24ac23ab 1000 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1001 ret = PTR_ERR(inode);
03f28e3a 1002 if (IS_ERR(inode))
1b370bc2
TM		 1003 goto err;
1004 ret = -ENOMEM;
24ac23ab
TM		 1005 state = nfs4_get_open_state(inode, data->owner);
1006 if (state == NULL)
1b370bc2 1007 goto err_put_inode;
549d6ed5 1008 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1009 int delegation_flags = 0;
1010
003707c7
TM		 1011 rcu_read_lock();
1012 delegation = rcu_dereference(NFS_I(inode)->delegation);
1013 if (delegation)
1014 delegation_flags = delegation->flags;
1015 rcu_read_unlock();
15c831bf 1016 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1017 nfs_inode_set_delegation(state->inode,
1018 data->owner->so_cred,
1019 &data->o_res);
1020 else
1021 nfs_inode_reclaim_delegation(state->inode,
1022 data->owner->so_cred,
1023 &data->o_res);
1024 }
34310430
TM		 1025
1026 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1027 data->o_arg.fmode);
24ac23ab 1028 iput(inode);
aac00a8d 1029out:
24ac23ab 1030 return state;
1b370bc2
TM		 1031err_put_inode:
1032 iput(inode);
1033err:
1034 return ERR_PTR(ret);
24ac23ab
TM		 1035}
1036
864472e9
TM		 1037static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1038{
1039 struct nfs_inode *nfsi = NFS_I(state->inode);
1040 struct nfs_open_context *ctx;
1041
1042 spin_lock(&state->inode->i_lock);
1043 list_for_each_entry(ctx, &nfsi->open_files, list) {
1044 if (ctx->state != state)
1045 continue;
1046 get_nfs_open_context(ctx);
1047 spin_unlock(&state->inode->i_lock);
1048 return ctx;
1049 }
1050 spin_unlock(&state->inode->i_lock);
1051 return ERR_PTR(-ENOENT);
1052}
1053
6f220ed5
TM		 1054static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1055{
1056 struct nfs4_opendata *opendata;
1057
dc0b027d 1058 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1059 if (opendata == NULL)
1060 return ERR_PTR(-ENOMEM);
1061 opendata->state = state;
1062 atomic_inc(&state->count);
1063 return opendata;
1064}
1065
dc0b027d 1066static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1067{
2ced46c2 1068 struct nfs4_state *newstate;
864472e9
TM		 1069 int ret;
1070
dc0b027d
TM		 1071 opendata->o_arg.open_flags = 0;
1072 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1073 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1074 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1075 nfs4_init_opendata_res(opendata);
b257957e 1076 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1077 if (ret != 0)
1078 return ret;
2ced46c2 1079 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1080 if (IS_ERR(newstate))
1081 return PTR_ERR(newstate);
dc0b027d 1082 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1083 *res = newstate;
864472e9
TM		 1084 return 0;
1085}
1086
1087static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1088{
864472e9 1089 struct nfs4_state *newstate;
864472e9
TM		 1090 int ret;
1091
1092 /* memory barrier prior to reading state->n_* */
2ced46c2 1093 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1094 smp_rmb();
1095 if (state->n_rdwr != 0) {
2ced46c2 1096 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1097 if (ret != 0)
1098 return ret;
2ced46c2
TM		 1099 if (newstate != state)
1100 return -ESTALE;
864472e9
TM		 1101 }
1102 if (state->n_wronly != 0) {
2ced46c2 1103 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1104 if (ret != 0)
1105 return ret;
2ced46c2
TM		 1106 if (newstate != state)
1107 return -ESTALE;
864472e9
TM		 1108 }
1109 if (state->n_rdonly != 0) {
2ced46c2 1110 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1111 if (ret != 0)
1112 return ret;
2ced46c2
TM		 1113 if (newstate != state)
1114 return -ESTALE;
864472e9 1115 }
1ac7e2fd
TM		 1116 /*
1117 * We may have performed cached opens for all three recoveries.
1118 * Check if we need to update the current stateid.
1119 */
1120 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1121 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1122 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1123 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1124 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1125 write_sequnlock(&state->seqlock);
1ac7e2fd 1126 }
864472e9
TM		 1127 return 0;
1128}
1129
1da177e4
LT		 1130/*
1131 * OPEN_RECLAIM:
1132 * reclaim state on the server after a reboot.
1da177e4 1133 */
539cd03a 1134static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1135{
1ac7e2fd 1136 struct nfs_delegation *delegation;
864472e9 1137 struct nfs4_opendata *opendata;
dc0b027d 1138 fmode_t delegation_type = 0;
1da177e4
LT		 1139 int status;
1140
6f220ed5
TM		 1141 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1142 if (IS_ERR(opendata))
1143 return PTR_ERR(opendata);
864472e9
TM		 1144 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1145 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1146 rcu_read_lock();
1147 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1148 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1149 delegation_type = delegation->type;
1ac7e2fd 1150 rcu_read_unlock();
864472e9
TM		 1151 opendata->o_arg.u.delegation_type = delegation_type;
1152 status = nfs4_open_recover(opendata, state);
c6d00e63 1153 nfs4_opendata_put(opendata);
1da177e4
LT		 1154 return status;
1155}
1156
539cd03a 1157static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1158{
1159 struct nfs_server *server = NFS_SERVER(state->inode);
1160 struct nfs4_exception exception = { };
1161 int err;
1162 do {
539cd03a 1163 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1164 if (err != -NFS4ERR_DELAY)
1165 break;
1166 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1167 } while (exception.retry);
1168 return err;
1169}
1170
864472e9
TM		 1171static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1172{
1173 struct nfs_open_context *ctx;
1174 int ret;
1175
1176 ctx = nfs4_state_find_open_context(state);
1177 if (IS_ERR(ctx))
1178 return PTR_ERR(ctx);
539cd03a 1179 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1180 put_nfs_open_context(ctx);
1181 return ret;
1182}
1183
13437e12 1184static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1185{
e56e0b78 1186 struct nfs4_opendata *opendata;
864472e9 1187 int ret;
1da177e4 1188
6f220ed5
TM		 1189 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1190 if (IS_ERR(opendata))
1191 return PTR_ERR(opendata);
e56e0b78 1192 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1193 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1194 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1195 ret = nfs4_open_recover(opendata, state);
c6d00e63 1196 nfs4_opendata_put(opendata);
864472e9 1197 return ret;
1da177e4
LT		 1198}
1199
13437e12 1200int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1201{
1202 struct nfs4_exception exception = { };
539cd03a 1203 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1204 int err;
1205 do {
13437e12 1206 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1207 switch (err) {
1208 case 0:
965b5d67
TM		 1209 case -ENOENT:
1210 case -ESTALE:
1211 goto out;
bcfa49f6
RL		 1212 case -NFS4ERR_BADSESSION:
1213 case -NFS4ERR_BADSLOT:
1214 case -NFS4ERR_BAD_HIGH_SLOT:
1215 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1216 case -NFS4ERR_DEADSESSION:
1217 nfs4_schedule_state_recovery(
1218 server->nfs_client);
1219 goto out;
1da177e4
LT		 1220 case -NFS4ERR_STALE_CLIENTID:
1221 case -NFS4ERR_STALE_STATEID:
1222 case -NFS4ERR_EXPIRED:
1223 /* Don't recall a delegation if it was lost */
7539bbab 1224 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1225 goto out;
1226 case -ERESTARTSYS:
1227 /*
1228 * The show must go on: exit, but mark the
1229 * stateid as needing recovery.
1230 */
1231 case -NFS4ERR_ADMIN_REVOKED:
1232 case -NFS4ERR_BAD_STATEID:
1233 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1234 case -ENOMEM:
1235 err = 0;
1236 goto out;
1da177e4
LT		 1237 }
1238 err = nfs4_handle_exception(server, err, &exception);
1239 } while (exception.retry);
965b5d67 1240out:
1da177e4
LT		 1241 return err;
1242}
1243
cdd4e68b
TM		 1244static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1245{
1246 struct nfs4_opendata *data = calldata;
1247
1248 data->rpc_status = task->tk_status;
1249 if (RPC_ASSASSINATED(task))
1250 return;
26e976a8 1251 if (data->rpc_status == 0) {
cdd4e68b
TM		 1252 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1253 sizeof(data->o_res.stateid.data));
bb22629e 1254 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1255 renew_lease(data->o_res.server, data->timestamp);
3e309914 1256 data->rpc_done = 1;
26e976a8 1257 }
cdd4e68b
TM		 1258}
1259
1260static void nfs4_open_confirm_release(void *calldata)
1261{
1262 struct nfs4_opendata *data = calldata;
1263 struct nfs4_state *state = NULL;
1264
1265 /* If this request hasn't been cancelled, do nothing */
1266 if (data->cancelled == 0)
1267 goto out_free;
1268 /* In case of error, no cleanup! */
3e309914 1269 if (!data->rpc_done)
cdd4e68b 1270 goto out_free;
cdd4e68b 1271 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1272 if (!IS_ERR(state))
dc0b027d 1273 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1274out_free:
c6d00e63 1275 nfs4_opendata_put(data);
cdd4e68b
TM		 1276}
1277
1278static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1279 .rpc_call_done = nfs4_open_confirm_done,
1280 .rpc_release = nfs4_open_confirm_release,
1281};
1282
1283/*
1284 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1285 */
1286static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1287{
1288 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1289 struct rpc_task *task;
5138fde0
TM		 1290 struct rpc_message msg = {
1291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1292 .rpc_argp = &data->c_arg,
1293 .rpc_resp = &data->c_res,
1294 .rpc_cred = data->owner->so_cred,
1295 };
c970aa85
TM		 1296 struct rpc_task_setup task_setup_data = {
1297 .rpc_client = server->client,
5138fde0 1298 .rpc_message = &msg,
c970aa85
TM		 1299 .callback_ops = &nfs4_open_confirm_ops,
1300 .callback_data = data,
101070ca 1301 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1302 .flags = RPC_TASK_ASYNC,
1303 };
1da177e4
LT		 1304 int status;
1305
c6d00e63 1306 kref_get(&data->kref);
3e309914
TM		 1307 data->rpc_done = 0;
1308 data->rpc_status = 0;
5138fde0 1309 data->timestamp = jiffies;
c970aa85 1310 task = rpc_run_task(&task_setup_data);
7a1218a2 1311 if (IS_ERR(task))
cdd4e68b 1312 return PTR_ERR(task);
cdd4e68b
TM		 1313 status = nfs4_wait_for_completion_rpc_task(task);
1314 if (status != 0) {
1315 data->cancelled = 1;
1316 smp_wmb();
1317 } else
1318 status = data->rpc_status;
e6b3c4db 1319 rpc_put_task(task);
1da177e4
LT		 1320 return status;
1321}
1322
24ac23ab 1323static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1324{
24ac23ab
TM		 1325 struct nfs4_opendata *data = calldata;
1326 struct nfs4_state_owner *sp = data->owner;
5138fde0 1327
24ac23ab
TM		 1328 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1329 return;
aac00a8d
TM		 1330 /*
1331 * Check if we still need to send an OPEN call, or if we can use
1332 * a delegation instead.
1333 */
1334 if (data->state != NULL) {
1335 struct nfs_delegation *delegation;
1336
dc0b027d 1337 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1338 goto out_no_action;
aac00a8d
TM		 1339 rcu_read_lock();
1340 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1341 if (delegation != NULL &&
15c831bf 1342 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1343 rcu_read_unlock();
6ee41268 1344 goto out_no_action;
aac00a8d
TM		 1345 }
1346 rcu_read_unlock();
1347 }
24ac23ab 1348 /* Update sequence id. */
9f958ab8 1349 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1350 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1351 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1352 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1353 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1354 }
26e976a8 1355 data->timestamp = jiffies;
d898528c
AA		 1356 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1357 &data->o_arg.seq_args,
1358 &data->o_res.seq_res, 1, task))
1359 return;
5138fde0 1360 rpc_call_start(task);
6ee41268
TM		 1361 return;
1362out_no_action:
1363 task->tk_action = NULL;
1364
24ac23ab 1365}
1da177e4 1366
b257957e
AB		 1367static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1368{
1369 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1370 nfs4_open_prepare(task, calldata);
1371}
1372
24ac23ab
TM		 1373static void nfs4_open_done(struct rpc_task *task, void *calldata)
1374{
1375 struct nfs4_opendata *data = calldata;
1da177e4 1376
24ac23ab 1377 data->rpc_status = task->tk_status;
d898528c 1378
d61e612a
TM		 1379 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1380 task->tk_status);
d898528c 1381
24ac23ab
TM		 1382 if (RPC_ASSASSINATED(task))
1383 return;
1384 if (task->tk_status == 0) {
1385 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1386 case S_IFREG:
1387 break;
1388 case S_IFLNK:
24ac23ab 1389 data->rpc_status = -ELOOP;
6f926b5b
TM		 1390 break;
1391 case S_IFDIR:
24ac23ab 1392 data->rpc_status = -EISDIR;
6f926b5b
TM		 1393 break;
1394 default:
24ac23ab 1395 data->rpc_status = -ENOTDIR;
6f926b5b 1396 }
26e976a8 1397 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1398 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1399 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1400 }
3e309914 1401 data->rpc_done = 1;
24ac23ab 1402}
6f926b5b 1403
24ac23ab
TM		 1404static void nfs4_open_release(void *calldata)
1405{
1406 struct nfs4_opendata *data = calldata;
1407 struct nfs4_state *state = NULL;
1408
1409 /* If this request hasn't been cancelled, do nothing */
1410 if (data->cancelled == 0)
1411 goto out_free;
1412 /* In case of error, no cleanup! */
3e309914 1413 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1414 goto out_free;
1415 /* In case we need an open_confirm, no cleanup! */
1416 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1417 goto out_free;
24ac23ab 1418 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1419 if (!IS_ERR(state))
dc0b027d 1420 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1421out_free:
c6d00e63 1422 nfs4_opendata_put(data);
24ac23ab
TM		 1423}
1424
1425static const struct rpc_call_ops nfs4_open_ops = {
1426 .rpc_call_prepare = nfs4_open_prepare,
1427 .rpc_call_done = nfs4_open_done,
1428 .rpc_release = nfs4_open_release,
1429};
1430
b257957e
AB		 1431static const struct rpc_call_ops nfs4_recover_open_ops = {
1432 .rpc_call_prepare = nfs4_recover_open_prepare,
1433 .rpc_call_done = nfs4_open_done,
1434 .rpc_release = nfs4_open_release,
1435};
1436
1437static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1438{
1439 struct inode *dir = data->dir->d_inode;
1440 struct nfs_server *server = NFS_SERVER(dir);
1441 struct nfs_openargs *o_arg = &data->o_arg;
1442 struct nfs_openres *o_res = &data->o_res;
1443 struct rpc_task *task;
5138fde0
TM		 1444 struct rpc_message msg = {
1445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1446 .rpc_argp = o_arg,
1447 .rpc_resp = o_res,
1448 .rpc_cred = data->owner->so_cred,
1449 };
c970aa85
TM		 1450 struct rpc_task_setup task_setup_data = {
1451 .rpc_client = server->client,
5138fde0 1452 .rpc_message = &msg,
c970aa85
TM		 1453 .callback_ops = &nfs4_open_ops,
1454 .callback_data = data,
101070ca 1455 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1456 .flags = RPC_TASK_ASYNC,
1457 };
24ac23ab
TM		 1458 int status;
1459
c6d00e63 1460 kref_get(&data->kref);
3e309914
TM		 1461 data->rpc_done = 0;
1462 data->rpc_status = 0;
2ced46c2 1463 data->cancelled = 0;
b257957e
AB		 1464 if (isrecover)
1465 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1466 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1467 if (IS_ERR(task))
1468 return PTR_ERR(task);
1469 status = nfs4_wait_for_completion_rpc_task(task);
1470 if (status != 0) {
1471 data->cancelled = 1;
1472 smp_wmb();
1473 } else
1474 status = data->rpc_status;
1475 rpc_put_task(task);
1476
1477 return status;
1478}
1479
1480static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1481{
1482 struct inode *dir = data->dir->d_inode;
1483 struct nfs_openres *o_res = &data->o_res;
1484 int status;
1485
1486 status = nfs4_run_open_task(data, 1);
1487 if (status != 0 || !data->rpc_done)
1488 return status;
1489
1490 nfs_refresh_inode(dir, o_res->dir_attr);
1491
1492 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1493 status = _nfs4_proc_open_confirm(data);
1494 if (status != 0)
1495 return status;
1496 }
1497
1498 return status;
1499}
1500
1501/*
1502 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1503 */
1504static int _nfs4_proc_open(struct nfs4_opendata *data)
1505{
1506 struct inode *dir = data->dir->d_inode;
1507 struct nfs_server *server = NFS_SERVER(dir);
1508 struct nfs_openargs *o_arg = &data->o_arg;
1509 struct nfs_openres *o_res = &data->o_res;
1510 int status;
1511
1512 status = nfs4_run_open_task(data, 0);
3e309914 1513 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1514 return status;
1515
56ae19f3
TM		 1516 if (o_arg->open_flags & O_CREAT) {
1517 update_changeattr(dir, &o_res->cinfo);
1518 nfs_post_op_update_inode(dir, o_res->dir_attr);
1519 } else
1520 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1521 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1522 status = _nfs4_proc_open_confirm(data);
1da177e4 1523 if (status != 0)
24ac23ab 1524 return status;
1da177e4
LT		 1525 }
1526 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1527 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1528 return 0;
1da177e4
LT		 1529}
1530
10afec90 1531static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1532{
7539bbab 1533 struct nfs_client *clp = server->nfs_client;
a78cb57a 1534 unsigned int loop;
6b30954e 1535 int ret;
58d9714a 1536
a78cb57a 1537 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1538 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1539 if (ret != 0)
a78cb57a 1540 break;
e598d843
TM		 1541 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1542 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1543 break;
58d9714a 1544 nfs4_schedule_state_recovery(clp);
a78cb57a 1545 ret = -EIO;
6b30954e 1546 }
a78cb57a 1547 return ret;
58d9714a
TM		 1548}
1549
1da177e4
LT		 1550/*
1551 * OPEN_EXPIRED:
1552 * reclaim state on the server after a network partition.
1553 * Assumes caller holds the appropriate lock
1554 */
539cd03a 1555static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1556{
e56e0b78 1557 struct nfs4_opendata *opendata;
864472e9 1558 int ret;
1da177e4 1559
6f220ed5
TM		 1560 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1561 if (IS_ERR(opendata))
1562 return PTR_ERR(opendata);
864472e9 1563 ret = nfs4_open_recover(opendata, state);
35d05778 1564 if (ret == -ESTALE)
539cd03a 1565 d_drop(ctx->path.dentry);
c6d00e63 1566 nfs4_opendata_put(opendata);
864472e9 1567 return ret;
1da177e4
LT		 1568}
1569
a9ed2e25 1570static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1571{
539cd03a 1572 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1573 struct nfs4_exception exception = { };
1574 int err;
1575
1576 do {
539cd03a 1577 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1578 switch (err) {
1579 default:
1580 goto out;
1581 case -NFS4ERR_GRACE:
1582 case -NFS4ERR_DELAY:
1583 nfs4_handle_exception(server, err, &exception);
1584 err = 0;
1585 }
202b50dc 1586 } while (exception.retry);
a9ed2e25 1587out:
202b50dc
TM		 1588 return err;
1589}
1590
1da177e4
LT		 1591static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1592{
1da177e4 1593 struct nfs_open_context *ctx;
864472e9 1594 int ret;
1da177e4 1595
864472e9
TM		 1596 ctx = nfs4_state_find_open_context(state);
1597 if (IS_ERR(ctx))
1598 return PTR_ERR(ctx);
539cd03a 1599 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1600 put_nfs_open_context(ctx);
1601 return ret;
1da177e4
LT		 1602}
1603
aa53ed54
JL		 1604/*
1605 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1606 * fields corresponding to attributes that were used to store the verifier.
1607 * Make sure we clobber those fields in the later setattr call
1608 */
1609static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1610{
1611 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1612 !(sattr->ia_valid & ATTR_ATIME_SET))
1613 sattr->ia_valid |= ATTR_ATIME;
1614
1615 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1616 !(sattr->ia_valid & ATTR_MTIME_SET))
1617 sattr->ia_valid |= ATTR_MTIME;
1618}
1619
1da177e4 1620/*
24ac23ab 1621 * Returns a referenced nfs4_state
1da177e4 1622 */
dc0b027d 1623static 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		 1624{
1625 struct nfs4_state_owner *sp;
1626 struct nfs4_state *state = NULL;
1627 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1628 struct nfs4_opendata *opendata;
aac00a8d 1629 int status;
1da177e4
LT		 1630
1631 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1632 status = -ENOMEM;
1633 if (!(sp = nfs4_get_state_owner(server, cred))) {
1634 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1635 goto out_err;
1636 }
58d9714a
TM		 1637 status = nfs4_recover_expired_lease(server);
1638 if (status != 0)
b4454fe1 1639 goto err_put_state_owner;
aac00a8d 1640 if (path->dentry->d_inode != NULL)
dc0b027d 1641 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1642 status = -ENOMEM;
dc0b027d 1643 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1644 if (opendata == NULL)
95d35cb4 1645 goto err_put_state_owner;
1da177e4 1646
aac00a8d
TM		 1647 if (path->dentry->d_inode != NULL)
1648 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1649
24ac23ab 1650 status = _nfs4_proc_open(opendata);
1da177e4 1651 if (status != 0)
c6d00e63 1652 goto err_opendata_put;
1da177e4 1653
aa53ed54
JL		 1654 if (opendata->o_arg.open_flags & O_EXCL)
1655 nfs4_exclusive_attrset(opendata, sattr);
1656
24ac23ab 1657 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1658 status = PTR_ERR(state);
1659 if (IS_ERR(state))
c6d00e63 1660 goto err_opendata_put;
c6d00e63 1661 nfs4_opendata_put(opendata);
1da177e4 1662 nfs4_put_state_owner(sp);
1da177e4
LT		 1663 *res = state;
1664 return 0;
c6d00e63
TM		 1665err_opendata_put:
1666 nfs4_opendata_put(opendata);
e56e0b78
TM		 1667err_put_state_owner:
1668 nfs4_put_state_owner(sp);
1da177e4 1669out_err:
1da177e4
LT		 1670 *res = NULL;
1671 return status;
1672}
1673
1674
dc0b027d 1675static 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		 1676{
1677 struct nfs4_exception exception = { };
1678 struct nfs4_state *res;
1679 int status;
1680
1681 do {
dc0b027d 1682 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1683 if (status == 0)
1684 break;
1685 /* NOTE: BAD_SEQID means the server and client disagree about the
1686 * book-keeping w.r.t. state-changing operations
1687 * (OPEN/CLOSE/LOCK/LOCKU...)
1688 * It is actually a sign of a bug on the client or on the server.
1689 *
1690 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1691 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1692 * have unhashed the old state_owner for us, and that we can
1693 * therefore safely retry using a new one. We should still warn
1694 * the user though...
1695 */
1696 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1697 printk(KERN_WARNING "NFS: v4 server %s "
1698 " returned a bad sequence-id error!\n",
1699 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1700 exception.retry = 1;
1701 continue;
1702 }
550f5747
TM		 1703 /*
1704 * BAD_STATEID on OPEN means that the server cancelled our
1705 * state before it received the OPEN_CONFIRM.
1706 * Recover by retrying the request as per the discussion
1707 * on Page 181 of RFC3530.
1708 */
1709 if (status == -NFS4ERR_BAD_STATEID) {
1710 exception.retry = 1;
1711 continue;
1712 }
aac00a8d
TM		 1713 if (status == -EAGAIN) {
1714 /* We must have found a delegation */
1715 exception.retry = 1;
1716 continue;
1717 }
1da177e4
LT		 1718 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1719 status, &exception));
1720 } while (exception.retry);
1721 return res;
1722}
1723
659bfcd6
TM		 1724static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1725 struct nfs_fattr *fattr, struct iattr *sattr,
1726 struct nfs4_state *state)
1da177e4 1727{
3e4f6290 1728 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1729 struct nfs_setattrargs arg = {
3e4f6290 1730 .fh = NFS_FH(inode),
1da177e4
LT		 1731 .iap = sattr,
1732 .server = server,
1733 .bitmask = server->attr_bitmask,
1734 };
1735 struct nfs_setattrres res = {
1736 .fattr = fattr,
1737 .server = server,
1738 };
1739 struct rpc_message msg = {
659bfcd6
TM		 1740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1741 .rpc_argp = &arg,
1742 .rpc_resp = &res,
1743 .rpc_cred = cred,
1da177e4 1744 };
26e976a8 1745 unsigned long timestamp = jiffies;
65e4308d 1746 int status;
1da177e4 1747
0e574af1 1748 nfs_fattr_init(fattr);
1da177e4 1749
3e4f6290
TM		 1750 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1751 /* Use that stateid */
1752 } else if (state != NULL) {
08e9eac4
TM		 1753 nfs4_copy_stateid(&arg.stateid, state, current->files);
1754 } else
1da177e4
LT		 1755 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1756
cccef3b9 1757 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1758 if (status == 0 && state != NULL)
1759 renew_lease(server, timestamp);
65e4308d 1760 return status;
1da177e4
LT		 1761}
1762
659bfcd6
TM		 1763static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1764 struct nfs_fattr *fattr, struct iattr *sattr,
1765 struct nfs4_state *state)
1da177e4 1766{
3e4f6290 1767 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1768 struct nfs4_exception exception = { };
1769 int err;
1770 do {
1771 err = nfs4_handle_exception(server,
659bfcd6 1772 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1773 &exception);
1774 } while (exception.retry);
1775 return err;
1776}
1777
1778struct nfs4_closedata {
4a35bd41 1779 struct path path;
1da177e4
LT		 1780 struct inode *inode;
1781 struct nfs4_state *state;
1782 struct nfs_closeargs arg;
1783 struct nfs_closeres res;
516a6af6 1784 struct nfs_fattr fattr;
26e976a8 1785 unsigned long timestamp;
1da177e4
LT		 1786};
1787
963d8fe5 1788static void nfs4_free_closedata(void *data)
9512135d 1789{
963d8fe5
TM		 1790 struct nfs4_closedata *calldata = data;
1791 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1792
1793 nfs4_put_open_state(calldata->state);
1794 nfs_free_seqid(calldata->arg.seqid);
9512135d 1795 nfs4_put_state_owner(sp);
31f31db1 1796 path_put(&calldata->path);
9512135d
TM		 1797 kfree(calldata);
1798}
1799
88069f77
TM		 1800static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1801 fmode_t fmode)
1802{
1803 spin_lock(&state->owner->so_lock);
1804 if (!(fmode & FMODE_READ))
1805 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1806 if (!(fmode & FMODE_WRITE))
1807 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1808 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1809 spin_unlock(&state->owner->so_lock);
1810}
1811
963d8fe5 1812static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1813{
963d8fe5 1814 struct nfs4_closedata *calldata = data;
1da177e4 1815 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1816 struct nfs_server *server = NFS_SERVER(calldata->inode);
1817
19ddab06 1818 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1819 if (RPC_ASSASSINATED(task))
1820 return;
1da177e4
LT		 1821 /* hmm. we are done with the inode, and in the process of freeing
1822 * the state_owner. we keep this around to process errors
1823 */
1da177e4
LT		 1824 switch (task->tk_status) {
1825 case 0:
45328c35 1826 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1827 renew_lease(server, calldata->timestamp);
88069f77
TM		 1828 nfs4_close_clear_stateid_flags(state,
1829 calldata->arg.fmode);
1da177e4
LT		 1830 break;
1831 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1832 case -NFS4ERR_OLD_STATEID:
1833 case -NFS4ERR_BAD_STATEID:
1da177e4 1834 case -NFS4ERR_EXPIRED:
dc0b027d 1835 if (calldata->arg.fmode == 0)
9e33bed5 1836 break;
1da177e4 1837 default:
72211dbe
TM		 1838 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1839 rpc_restart_call_prepare(task);
1da177e4 1840 }
72211dbe 1841 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1842 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1843}
1844
4ce70ada 1845static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1846{
4ce70ada 1847 struct nfs4_closedata *calldata = data;
9512135d 1848 struct nfs4_state *state = calldata->state;
88069f77 1849 int call_close = 0;
9512135d 1850
963d8fe5 1851 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1852 return;
003707c7 1853
88069f77
TM		 1854 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1855 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1856 spin_lock(&state->owner->so_lock);
003707c7 1857 /* Calculate the change in open mode */
e7616923 1858 if (state->n_rdwr == 0) {
003707c7 1859 if (state->n_rdonly == 0) {
88069f77
TM		 1860 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1861 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1862 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1863 }
1864 if (state->n_wronly == 0) {
88069f77
TM		 1865 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1866 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1867 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1868 }
e7616923 1869 }
4cecb76f 1870 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1871
1872 if (!call_close) {
963d8fe5
TM		 1873 /* Note: exit _without_ calling nfs4_close_done */
1874 task->tk_action = NULL;
9512135d
TM		 1875 return;
1876 }
88069f77
TM		 1877
1878 if (calldata->arg.fmode == 0)
1879 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1880
516a6af6 1881 nfs_fattr_init(calldata->res.fattr);
26e976a8 1882 calldata->timestamp = jiffies;
19ddab06
AA		 1883 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1884 &calldata->arg.seq_args, &calldata->res.seq_res,
1885 1, task))
1886 return;
5138fde0 1887 rpc_call_start(task);
1da177e4
LT		 1888}
1889
963d8fe5 1890static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1891 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1892 .rpc_call_done = nfs4_close_done,
1893 .rpc_release = nfs4_free_closedata,
1894};
1895
1da177e4
LT		 1896/*
1897 * It is possible for data to be read/written from a mem-mapped file
1898 * after the sys_close call (which hits the vfs layer as a flush).
1899 * This means that we can't safely call nfsv4 close on a file until
1900 * the inode is cleared. This in turn means that we are not good
1901 * NFSv4 citizens - we do not indicate to the server to update the file's
1902 * share state even when we are done with one of the three share
1903 * stateid's in the inode.
1904 *
1905 * NOTE: Caller must be holding the sp->so_owner semaphore!
1906 */
a49c3c77 1907int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1908{
4a35bd41 1909 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1910 struct nfs4_closedata *calldata;
b39e625b
TM		 1911 struct nfs4_state_owner *sp = state->owner;
1912 struct rpc_task *task;
5138fde0
TM		 1913 struct rpc_message msg = {
1914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1915 .rpc_cred = state->owner->so_cred,
1916 };
c970aa85
TM		 1917 struct rpc_task_setup task_setup_data = {
1918 .rpc_client = server->client,
5138fde0 1919 .rpc_message = &msg,
c970aa85 1920 .callback_ops = &nfs4_close_ops,
101070ca 1921 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1922 .flags = RPC_TASK_ASYNC,
1923 };
9512135d 1924 int status = -ENOMEM;
1da177e4 1925
19ddab06 1926 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1927 if (calldata == NULL)
9512135d 1928 goto out;
4a35bd41 1929 calldata->inode = state->inode;
1da177e4 1930 calldata->state = state;
4a35bd41 1931 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1932 calldata->arg.stateid = &state->open_stateid;
1da177e4 1933 /* Serialization for the sequence id */
cee54fc9 1934 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1935 if (calldata->arg.seqid == NULL)
1936 goto out_free_calldata;
dc0b027d 1937 calldata->arg.fmode = 0;
a65318bf 1938 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1939 calldata->res.fattr = &calldata->fattr;
c1d51931 1940 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1941 calldata->res.server = server;
5f7dbd5c 1942 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1943 calldata->path.mnt = mntget(path->mnt);
1944 calldata->path.dentry = dget(path->dentry);
9512135d 1945
5138fde0
TM		 1946 msg.rpc_argp = &calldata->arg,
1947 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1948 task_setup_data.callback_data = calldata;
1949 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1950 if (IS_ERR(task))
1951 return PTR_ERR(task);
a49c3c77
TM		 1952 status = 0;
1953 if (wait)
1954 status = rpc_wait_for_completion_task(task);
b39e625b 1955 rpc_put_task(task);
a49c3c77 1956 return status;
9512135d
TM		 1957out_free_calldata:
1958 kfree(calldata);
1959out:
b39e625b
TM		 1960 nfs4_put_open_state(state);
1961 nfs4_put_state_owner(sp);
9512135d 1962 return status;
1da177e4
LT		 1963}
1964
dc0b027d 1965static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1966{
1967 struct file *filp;
1b45c46c 1968 int ret;
02a913a7 1969
1b45c46c 1970 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1971 if (fmode & FMODE_EXEC) {
af22f94a 1972 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1973 state->owner->so_cred,
1974 nd->intent.open.flags);
1975 if (ret < 0)
1976 goto out_close;
1977 }
4a35bd41 1978 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1979 if (!IS_ERR(filp)) {
1980 struct nfs_open_context *ctx;
cd3758e3 1981 ctx = nfs_file_open_context(filp);
02a913a7 1982 ctx->state = state;
95cf959b
TM		 1983 return 0;
1984 }
1b45c46c
TM		 1985 ret = PTR_ERR(filp);
1986out_close:
dc0b027d 1987 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1988 return ret;
02a913a7
TM		 1989}
1990
1991struct dentry *
1da177e4
LT		 1992nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1993{
ad389da7 1994 struct path path = {
4ac91378 1995 .mnt = nd->path.mnt,
ad389da7
TM		 1996 .dentry = dentry,
1997 };
4ac91378 1998 struct dentry *parent;
1da177e4
LT		 1999 struct iattr attr;
2000 struct rpc_cred *cred;
2001 struct nfs4_state *state;
02a913a7 2002 struct dentry *res;
dc0b027d 2003 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2004
2005 if (nd->flags & LOOKUP_CREATE) {
2006 attr.ia_mode = nd->intent.open.create_mode;
2007 attr.ia_valid = ATTR_MODE;
2008 if (!IS_POSIXACL(dir))
ce3b0f8d 2009 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2010 } else {
2011 attr.ia_valid = 0;
2012 BUG_ON(nd->intent.open.flags & O_CREAT);
2013 }
2014
98a8e323 2015 cred = rpc_lookup_cred();
1da177e4 2016 if (IS_ERR(cred))
02a913a7 2017 return (struct dentry *)cred;
565277f6
TM		 2018 parent = dentry->d_parent;
2019 /* Protect against concurrent sillydeletes */
2020 nfs_block_sillyrename(parent);
dc0b027d 2021 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2022 put_rpccred(cred);
02a913a7 2023 if (IS_ERR(state)) {
d75340cc 2024 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2025 d_add(dentry, NULL);
d75340cc
TM		 2026 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2027 }
565277f6 2028 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2029 return (struct dentry *)state;
2030 }
24ac23ab 2031 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2032 if (res != NULL)
deee9369 2033 path.dentry = res;
d75340cc 2034 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2035 nfs_unblock_sillyrename(parent);
dc0b027d 2036 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2037 return res;
1da177e4
LT		 2038}
2039
2040int
02a913a7 2041nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2042{
ad389da7 2043 struct path path = {
4ac91378 2044 .mnt = nd->path.mnt,
ad389da7
TM		 2045 .dentry = dentry,
2046 };
1da177e4
LT		 2047 struct rpc_cred *cred;
2048 struct nfs4_state *state;
dc0b027d 2049 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2050
98a8e323 2051 cred = rpc_lookup_cred();
1da177e4
LT		 2052 if (IS_ERR(cred))
2053 return PTR_ERR(cred);
dc0b027d 2054 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2055 put_rpccred(cred);
02a913a7
TM		 2056 if (IS_ERR(state)) {
2057 switch (PTR_ERR(state)) {
2058 case -EPERM:
2059 case -EACCES:
2060 case -EDQUOT:
2061 case -ENOSPC:
2062 case -EROFS:
2063 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
2064 return 1;
b87c0adf
CL		 2065 default:
2066 goto out_drop;
02a913a7 2067 }
02a913a7 2068 }
24ac23ab 2069 if (state->inode == dentry->d_inode) {
d75340cc 2070 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2071 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2072 return 1;
2073 }
dc0b027d 2074 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2075out_drop:
2076 d_drop(dentry);
1da177e4
LT		 2077 return 0;
2078}
2079
1185a552 2080static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2081{
2082 if (ctx->state == NULL)
2083 return;
2084 if (is_sync)
2085 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2086 else
2087 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2088}
1da177e4
LT		 2089
2090static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2091{
43652ad5
BH		 2092 struct nfs4_server_caps_arg args = {
2093 .fhandle = fhandle,
2094 };
1da177e4
LT		 2095 struct nfs4_server_caps_res res = {};
2096 struct rpc_message msg = {
2097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2098 .rpc_argp = &args,
1da177e4
LT		 2099 .rpc_resp = &res,
2100 };
2101 int status;
2102
cccef3b9 2103 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2104 if (status == 0) {
2105 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2106 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2107 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2108 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2109 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2110 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2111 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2112 server->caps |= NFS_CAP_ACLS;
2113 if (res.has_links != 0)
2114 server->caps |= NFS_CAP_HARDLINKS;
2115 if (res.has_symlinks != 0)
2116 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2117 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2118 server->caps |= NFS_CAP_FILEID;
2119 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2120 server->caps |= NFS_CAP_MODE;
2121 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2122 server->caps |= NFS_CAP_NLINK;
2123 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2124 server->caps |= NFS_CAP_OWNER;
2125 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2126 server->caps |= NFS_CAP_OWNER_GROUP;
2127 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2128 server->caps |= NFS_CAP_ATIME;
2129 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2130 server->caps |= NFS_CAP_CTIME;
2131 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2132 server->caps |= NFS_CAP_MTIME;
2133
a65318bf
TM		 2134 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2135 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2136 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2137 server->acl_bitmask = res.acl_bitmask;
2138 }
cccef3b9 2139
1da177e4
LT		 2140 return status;
2141}
2142
55a97593 2143int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2144{
2145 struct nfs4_exception exception = { };
2146 int err;
2147 do {
2148 err = nfs4_handle_exception(server,
2149 _nfs4_server_capabilities(server, fhandle),
2150 &exception);
2151 } while (exception.retry);
2152 return err;
2153}
2154
2155static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2156 struct nfs_fsinfo *info)
2157{
1da177e4
LT		 2158 struct nfs4_lookup_root_arg args = {
2159 .bitmask = nfs4_fattr_bitmap,
2160 };
2161 struct nfs4_lookup_res res = {
2162 .server = server,
0e574af1 2163 .fattr = info->fattr,
1da177e4
LT		 2164 .fh = fhandle,
2165 };
2166 struct rpc_message msg = {
2167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2168 .rpc_argp = &args,
2169 .rpc_resp = &res,
2170 };
008f55d0 2171
0e574af1 2172 nfs_fattr_init(info->fattr);
fccba804 2173 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2174}
2175
2176static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2177 struct nfs_fsinfo *info)
2178{
2179 struct nfs4_exception exception = { };
2180 int err;
2181 do {
2182 err = nfs4_handle_exception(server,
2183 _nfs4_lookup_root(server, fhandle, info),
2184 &exception);
2185 } while (exception.retry);
2186 return err;
2187}
2188
54ceac45
DH		 2189/*
2190 * get the file handle for the "/" directory on the server
2191 */
1da177e4 2192static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2193 struct nfs_fsinfo *info)
1da177e4 2194{
1da177e4
LT		 2195 int status;
2196
1da177e4 2197 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2198 if (status == 0)
2199 status = nfs4_server_capabilities(server, fhandle);
2200 if (status == 0)
2201 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2202 return nfs4_map_errors(status);
1da177e4
LT		 2203}
2204
6b97fd3d
MN		 2205/*
2206 * Get locations and (maybe) other attributes of a referral.
2207 * Note that we'll actually follow the referral later when
2208 * we detect fsid mismatch in inode revalidation
2209 */
56659e99 2210static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2211{
2212 int status = -ENOMEM;
2213 struct page *page = NULL;
2214 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2215
2216 page = alloc_page(GFP_KERNEL);
2217 if (page == NULL)
2218 goto out;
2219 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2220 if (locations == NULL)
2221 goto out;
2222
c228fd3a 2223 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2224 if (status != 0)
2225 goto out;
2226 /* Make sure server returned a different fsid for the referral */
2227 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2228 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2229 status = -EIO;
2230 goto out;
2231 }
2232
2233 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2234 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2235 if (!fattr->mode)
2236 fattr->mode = S_IFDIR;
2237 memset(fhandle, 0, sizeof(struct nfs_fh));
2238out:
2239 if (page)
2240 __free_page(page);
2241 if (locations)
2242 kfree(locations);
2243 return status;
2244}
2245
1da177e4
LT		 2246static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2247{
2248 struct nfs4_getattr_arg args = {
2249 .fh = fhandle,
2250 .bitmask = server->attr_bitmask,
2251 };
2252 struct nfs4_getattr_res res = {
2253 .fattr = fattr,
2254 .server = server,
2255 };
2256 struct rpc_message msg = {
2257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2258 .rpc_argp = &args,
2259 .rpc_resp = &res,
2260 };
2261
0e574af1 2262 nfs_fattr_init(fattr);
cccef3b9 2263 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2264}
2265
2266static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2267{
2268 struct nfs4_exception exception = { };
2269 int err;
2270 do {
2271 err = nfs4_handle_exception(server,
2272 _nfs4_proc_getattr(server, fhandle, fattr),
2273 &exception);
2274 } while (exception.retry);
2275 return err;
2276}
2277
2278/*
2279 * The file is not closed if it is opened due to the a request to change
2280 * the size of the file. The open call will not be needed once the
2281 * VFS layer lookup-intents are implemented.
2282 *
2283 * Close is called when the inode is destroyed.
2284 * If we haven't opened the file for O_WRONLY, we
2285 * need to in the size_change case to obtain a stateid.
2286 *
2287 * Got race?
2288 * Because OPEN is always done by name in nfsv4, it is
2289 * possible that we opened a different file by the same
2290 * name. We can recognize this race condition, but we
2291 * can't do anything about it besides returning an error.
2292 *
2293 * This will be fixed with VFS changes (lookup-intent).
2294 */
2295static int
2296nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2297 struct iattr *sattr)
2298{
08e9eac4 2299 struct inode *inode = dentry->d_inode;
659bfcd6 2300 struct rpc_cred *cred = NULL;
d530838b 2301 struct nfs4_state *state = NULL;
1da177e4
LT		 2302 int status;
2303
0e574af1 2304 nfs_fattr_init(fattr);
1da177e4 2305
d530838b 2306 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2307 if (sattr->ia_valid & ATTR_FILE) {
2308 struct nfs_open_context *ctx;
2309
2310 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2311 if (ctx) {
2312 cred = ctx->cred;
2313 state = ctx->state;
2314 }
659bfcd6 2315 }
08e9eac4 2316
659bfcd6 2317 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2318 if (status == 0)
2319 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2320 return status;
2321}
2322
56659e99
TM		 2323static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2324 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2325 struct nfs_fattr *fattr)
2326{
2327 int status;
2328 struct nfs4_lookup_arg args = {
2329 .bitmask = server->attr_bitmask,
2330 .dir_fh = dirfh,
2331 .name = name,
2332 };
2333 struct nfs4_lookup_res res = {
2334 .server = server,
2335 .fattr = fattr,
2336 .fh = fhandle,
2337 };
2338 struct rpc_message msg = {
2339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2340 .rpc_argp = &args,
2341 .rpc_resp = &res,
2342 };
2343
2344 nfs_fattr_init(fattr);
2345
2346 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2347 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2348 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2349 return status;
2350}
2351
2352static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2353 struct qstr *name, struct nfs_fh *fhandle,
2354 struct nfs_fattr *fattr)
2355{
2356 struct nfs4_exception exception = { };
2357 int err;
2358 do {
4e56e082
TM		 2359 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2360 /* FIXME: !!!! */
2361 if (err == -NFS4ERR_MOVED) {
2362 err = -EREMOTE;
2363 break;
2364 }
2365 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2366 } while (exception.retry);
2367 return err;
2368}
2369
56659e99 2370static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2371 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2372{
4e56e082 2373 int status;
1da177e4
LT		 2374
2375 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2376 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2377 if (status == -NFS4ERR_MOVED)
2378 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2379 dprintk("NFS reply lookup: %d\n", status);
2380 return status;
2381}
2382
2383static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2384{
2385 struct nfs4_exception exception = { };
2386 int err;
2387 do {
2388 err = nfs4_handle_exception(NFS_SERVER(dir),
2389 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2390 &exception);
2391 } while (exception.retry);
2392 return err;
2393}
2394
2395static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2396{
76b32999
TM		 2397 struct nfs_server *server = NFS_SERVER(inode);
2398 struct nfs_fattr fattr;
1da177e4
LT		 2399 struct nfs4_accessargs args = {
2400 .fh = NFS_FH(inode),
76b32999
TM		 2401 .bitmask = server->attr_bitmask,
2402 };
2403 struct nfs4_accessres res = {
2404 .server = server,
2405 .fattr = &fattr,
1da177e4 2406 };
1da177e4
LT		 2407 struct rpc_message msg = {
2408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2409 .rpc_argp = &args,
2410 .rpc_resp = &res,
2411 .rpc_cred = entry->cred,
2412 };
2413 int mode = entry->mask;
2414 int status;
2415
2416 /*
2417 * Determine which access bits we want to ask for...
2418 */
2419 if (mode & MAY_READ)
2420 args.access |= NFS4_ACCESS_READ;
2421 if (S_ISDIR(inode->i_mode)) {
2422 if (mode & MAY_WRITE)
2423 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2424 if (mode & MAY_EXEC)
2425 args.access |= NFS4_ACCESS_LOOKUP;
2426 } else {
2427 if (mode & MAY_WRITE)
2428 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2429 if (mode & MAY_EXEC)
2430 args.access |= NFS4_ACCESS_EXECUTE;
2431 }
76b32999 2432 nfs_fattr_init(&fattr);
cccef3b9 2433 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2434 if (!status) {
2435 entry->mask = 0;
2436 if (res.access & NFS4_ACCESS_READ)
2437 entry->mask |= MAY_READ;
2438 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2439 entry->mask |= MAY_WRITE;
2440 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2441 entry->mask |= MAY_EXEC;
76b32999 2442 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2443 }
2444 return status;
2445}
2446
2447static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2448{
2449 struct nfs4_exception exception = { };
2450 int err;
2451 do {
2452 err = nfs4_handle_exception(NFS_SERVER(inode),
2453 _nfs4_proc_access(inode, entry),
2454 &exception);
2455 } while (exception.retry);
2456 return err;
2457}
2458
2459/*
2460 * TODO: For the time being, we don't try to get any attributes
2461 * along with any of the zero-copy operations READ, READDIR,
2462 * READLINK, WRITE.
2463 *
2464 * In the case of the first three, we want to put the GETATTR
2465 * after the read-type operation -- this is because it is hard
2466 * to predict the length of a GETATTR response in v4, and thus
2467 * align the READ data correctly. This means that the GETATTR
2468 * may end up partially falling into the page cache, and we should
2469 * shift it into the 'tail' of the xdr_buf before processing.
2470 * To do this efficiently, we need to know the total length
2471 * of data received, which doesn't seem to be available outside
2472 * of the RPC layer.
2473 *
2474 * In the case of WRITE, we also want to put the GETATTR after
2475 * the operation -- in this case because we want to make sure
2476 * we get the post-operation mtime and size. This means that
2477 * we can't use xdr_encode_pages() as written: we need a variant
2478 * of it which would leave room in the 'tail' iovec.
2479 *
2480 * Both of these changes to the XDR layer would in fact be quite
2481 * minor, but I decided to leave them for a subsequent patch.
2482 */
2483static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2484 unsigned int pgbase, unsigned int pglen)
2485{
2486 struct nfs4_readlink args = {
2487 .fh = NFS_FH(inode),
2488 .pgbase = pgbase,
2489 .pglen = pglen,
2490 .pages = &page,
2491 };
f50c7000 2492 struct nfs4_readlink_res res;
1da177e4
LT		 2493 struct rpc_message msg = {
2494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2495 .rpc_argp = &args,
f50c7000 2496 .rpc_resp = &res,
1da177e4
LT		 2497 };
2498
cccef3b9 2499 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2500}
2501
2502static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2503 unsigned int pgbase, unsigned int pglen)
2504{
2505 struct nfs4_exception exception = { };
2506 int err;
2507 do {
2508 err = nfs4_handle_exception(NFS_SERVER(inode),
2509 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2510 &exception);
2511 } while (exception.retry);
2512 return err;
2513}
2514
1da177e4
LT		 2515/*
2516 * Got race?
2517 * We will need to arrange for the VFS layer to provide an atomic open.
2518 * Until then, this create/open method is prone to inefficiency and race
2519 * conditions due to the lookup, create, and open VFS calls from sys_open()
2520 * placed on the wire.
2521 *
2522 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2523 * The file will be opened again in the subsequent VFS open call
2524 * (nfs4_proc_file_open).
2525 *
2526 * The open for read will just hang around to be used by any process that
2527 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2528 */
2529
2530static int
2531nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2532 int flags, struct nameidata *nd)
1da177e4 2533{
ad389da7 2534 struct path path = {
4ac91378 2535 .mnt = nd->path.mnt,
ad389da7
TM		 2536 .dentry = dentry,
2537 };
1da177e4
LT		 2538 struct nfs4_state *state;
2539 struct rpc_cred *cred;
dc0b027d 2540 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2541 int status = 0;
2542
98a8e323 2543 cred = rpc_lookup_cred();
1da177e4
LT		 2544 if (IS_ERR(cred)) {
2545 status = PTR_ERR(cred);
2546 goto out;
2547 }
dc0b027d 2548 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2549 d_drop(dentry);
1da177e4
LT		 2550 if (IS_ERR(state)) {
2551 status = PTR_ERR(state);
659bfcd6 2552 goto out_putcred;
1da177e4 2553 }
d4d9cdcb 2554 d_add(dentry, igrab(state->inode));
d75340cc 2555 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2556 if (flags & O_EXCL) {
2557 struct nfs_fattr fattr;
659bfcd6 2558 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2559 if (status == 0)
65e4308d 2560 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2561 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2562 }
ad389da7 2563 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2564 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2565 else
dc0b027d 2566 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2567out_putcred:
2568 put_rpccred(cred);
1da177e4
LT		 2569out:
2570 return status;
2571}
2572
2573static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2574{
16e42959 2575 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2576 struct nfs_removeargs args = {
1da177e4 2577 .fh = NFS_FH(dir),
4fdc17b2
TM		 2578 .name.len = name->len,
2579 .name.name = name->name,
16e42959
TM		 2580 .bitmask = server->attr_bitmask,
2581 };
4fdc17b2 2582 struct nfs_removeres res = {
16e42959 2583 .server = server,
1da177e4 2584 };
1da177e4 2585 struct rpc_message msg = {
4fdc17b2
TM		 2586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2587 .rpc_argp = &args,
2588 .rpc_resp = &res,
1da177e4
LT		 2589 };
2590 int status;
2591
4fdc17b2 2592 nfs_fattr_init(&res.dir_attr);
cccef3b9 2593 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2594 if (status == 0) {
2595 update_changeattr(dir, &res.cinfo);
4fdc17b2 2596 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2597 }
1da177e4
LT		 2598 return status;
2599}
2600
2601static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2602{
2603 struct nfs4_exception exception = { };
2604 int err;
2605 do {
2606 err = nfs4_handle_exception(NFS_SERVER(dir),
2607 _nfs4_proc_remove(dir, name),
2608 &exception);
2609 } while (exception.retry);
2610 return err;
2611}
2612
e4eff1a6 2613static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2614{
e4eff1a6
TM		 2615 struct nfs_server *server = NFS_SERVER(dir);
2616 struct nfs_removeargs *args = msg->rpc_argp;
2617 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2618
a65318bf 2619 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2620 res->server = server;
1da177e4 2621 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2622}
2623
e4eff1a6 2624static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2625{
e4eff1a6
TM		 2626 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2627
472cfbd9 2628 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2629 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2630 return 0;
2631 update_changeattr(dir, &res->cinfo);
2632 nfs_post_op_update_inode(dir, &res->dir_attr);
2633 return 1;
1da177e4
LT		 2634}
2635
2636static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2637 struct inode *new_dir, struct qstr *new_name)
2638{
6caf2c82 2639 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2640 struct nfs4_rename_arg arg = {
2641 .old_dir = NFS_FH(old_dir),
2642 .new_dir = NFS_FH(new_dir),
2643 .old_name = old_name,
2644 .new_name = new_name,
6caf2c82
TM		 2645 .bitmask = server->attr_bitmask,
2646 };
2647 struct nfs_fattr old_fattr, new_fattr;
2648 struct nfs4_rename_res res = {
2649 .server = server,
2650 .old_fattr = &old_fattr,
2651 .new_fattr = &new_fattr,
1da177e4 2652 };
1da177e4
LT		 2653 struct rpc_message msg = {
2654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2655 .rpc_argp = &arg,
2656 .rpc_resp = &res,
2657 };
2658 int status;
2659
6caf2c82
TM		 2660 nfs_fattr_init(res.old_fattr);
2661 nfs_fattr_init(res.new_fattr);
cccef3b9 2662 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2663
2664 if (!status) {
2665 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2666 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2667 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2668 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2669 }
2670 return status;
2671}
2672
2673static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2674 struct inode *new_dir, struct qstr *new_name)
2675{
2676 struct nfs4_exception exception = { };
2677 int err;
2678 do {
2679 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2680 _nfs4_proc_rename(old_dir, old_name,
2681 new_dir, new_name),
2682 &exception);
2683 } while (exception.retry);
2684 return err;
2685}
2686
2687static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2688{
91ba2eee 2689 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2690 struct nfs4_link_arg arg = {
2691 .fh = NFS_FH(inode),
2692 .dir_fh = NFS_FH(dir),
2693 .name = name,
91ba2eee
TM		 2694 .bitmask = server->attr_bitmask,
2695 };
2696 struct nfs_fattr fattr, dir_attr;
2697 struct nfs4_link_res res = {
2698 .server = server,
2699 .fattr = &fattr,
2700 .dir_attr = &dir_attr,
1da177e4 2701 };
1da177e4
LT		 2702 struct rpc_message msg = {
2703 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2704 .rpc_argp = &arg,
91ba2eee 2705 .rpc_resp = &res,
1da177e4
LT		 2706 };
2707 int status;
2708
91ba2eee
TM		 2709 nfs_fattr_init(res.fattr);
2710 nfs_fattr_init(res.dir_attr);
cccef3b9 2711 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2712 if (!status) {
2713 update_changeattr(dir, &res.cinfo);
2714 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2715 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2716 }
1da177e4
LT		 2717
2718 return status;
2719}
2720
2721static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2722{
2723 struct nfs4_exception exception = { };
2724 int err;
2725 do {
2726 err = nfs4_handle_exception(NFS_SERVER(inode),
2727 _nfs4_proc_link(inode, dir, name),
2728 &exception);
2729 } while (exception.retry);
2730 return err;
2731}
2732
57dc9a57
TM		 2733struct nfs4_createdata {
2734 struct rpc_message msg;
2735 struct nfs4_create_arg arg;
2736 struct nfs4_create_res res;
2737 struct nfs_fh fh;
2738 struct nfs_fattr fattr;
2739 struct nfs_fattr dir_fattr;
2740};
2741
2742static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2743 struct qstr *name, struct iattr *sattr, u32 ftype)
2744{
2745 struct nfs4_createdata *data;
2746
2747 data = kzalloc(sizeof(*data), GFP_KERNEL);
2748 if (data != NULL) {
2749 struct nfs_server *server = NFS_SERVER(dir);
2750
2751 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2752 data->msg.rpc_argp = &data->arg;
2753 data->msg.rpc_resp = &data->res;
2754 data->arg.dir_fh = NFS_FH(dir);
2755 data->arg.server = server;
2756 data->arg.name = name;
2757 data->arg.attrs = sattr;
2758 data->arg.ftype = ftype;
2759 data->arg.bitmask = server->attr_bitmask;
2760 data->res.server = server;
2761 data->res.fh = &data->fh;
2762 data->res.fattr = &data->fattr;
2763 data->res.dir_fattr = &data->dir_fattr;
2764 nfs_fattr_init(data->res.fattr);
2765 nfs_fattr_init(data->res.dir_fattr);
2766 }
2767 return data;
2768}
2769
2770static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2771{
cccef3b9
AA		 2772 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2773 &data->arg, &data->res, 1);
57dc9a57
TM		 2774 if (status == 0) {
2775 update_changeattr(dir, &data->res.dir_cinfo);
2776 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2777 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2778 }
2779 return status;
2780}
2781
2782static void nfs4_free_createdata(struct nfs4_createdata *data)
2783{
2784 kfree(data);
2785}
2786
4f390c15 2787static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2788 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2789{
57dc9a57
TM		 2790 struct nfs4_createdata *data;
2791 int status = -ENAMETOOLONG;
1da177e4 2792
94a6d753 2793 if (len > NFS4_MAXPATHLEN)
57dc9a57 2794 goto out;
4f390c15 2795
57dc9a57
TM		 2796 status = -ENOMEM;
2797 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2798 if (data == NULL)
2799 goto out;
2800
2801 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2802 data->arg.u.symlink.pages = &page;
2803 data->arg.u.symlink.len = len;
1da177e4 2804
57dc9a57
TM		 2805 status = nfs4_do_create(dir, dentry, data);
2806
2807 nfs4_free_createdata(data);
2808out:
1da177e4
LT		 2809 return status;
2810}
2811
4f390c15 2812static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2813 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2814{
2815 struct nfs4_exception exception = { };
2816 int err;
2817 do {
2818 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2819 _nfs4_proc_symlink(dir, dentry, page,
2820 len, sattr),
1da177e4
LT		 2821 &exception);
2822 } while (exception.retry);
2823 return err;
2824}
2825
2826static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2827 struct iattr *sattr)
2828{
57dc9a57
TM		 2829 struct nfs4_createdata *data;
2830 int status = -ENOMEM;
1da177e4 2831
57dc9a57
TM		 2832 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2833 if (data == NULL)
2834 goto out;
2835
2836 status = nfs4_do_create(dir, dentry, data);
2837
2838 nfs4_free_createdata(data);
2839out:
1da177e4
LT		 2840 return status;
2841}
2842
2843static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2844 struct iattr *sattr)
2845{
2846 struct nfs4_exception exception = { };
2847 int err;
2848 do {
2849 err = nfs4_handle_exception(NFS_SERVER(dir),
2850 _nfs4_proc_mkdir(dir, dentry, sattr),
2851 &exception);
2852 } while (exception.retry);
2853 return err;
2854}
2855
2856static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2857 u64 cookie, struct page *page, unsigned int count, int plus)
2858{
2859 struct inode *dir = dentry->d_inode;
2860 struct nfs4_readdir_arg args = {
2861 .fh = NFS_FH(dir),
2862 .pages = &page,
2863 .pgbase = 0,
2864 .count = count,
96d25e53 2865 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2866 };
2867 struct nfs4_readdir_res res;
2868 struct rpc_message msg = {
2869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2870 .rpc_argp = &args,
2871 .rpc_resp = &res,
2872 .rpc_cred = cred,
2873 };
2874 int status;
2875
3110ff80 2876 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2877 dentry->d_parent->d_name.name,
2878 dentry->d_name.name,
2879 (unsigned long long)cookie);
1da177e4
LT		 2880 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2881 res.pgbase = args.pgbase;
cccef3b9 2882 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2883 if (status == 0)
2884 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2885
2886 nfs_invalidate_atime(dir);
2887
3110ff80 2888 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2889 return status;
2890}
2891
2892static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2893 u64 cookie, struct page *page, unsigned int count, int plus)
2894{
2895 struct nfs4_exception exception = { };
2896 int err;
2897 do {
2898 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2899 _nfs4_proc_readdir(dentry, cred, cookie,
2900 page, count, plus),
2901 &exception);
2902 } while (exception.retry);
2903 return err;
2904}
2905
2906static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2907 struct iattr *sattr, dev_t rdev)
2908{
57dc9a57
TM		 2909 struct nfs4_createdata *data;
2910 int mode = sattr->ia_mode;
2911 int status = -ENOMEM;
1da177e4
LT		 2912
2913 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2914 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2915
2916 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2917 if (data == NULL)
2918 goto out;
2919
1da177e4 2920 if (S_ISFIFO(mode))
57dc9a57 2921 data->arg.ftype = NF4FIFO;
1da177e4 2922 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2923 data->arg.ftype = NF4BLK;
2924 data->arg.u.device.specdata1 = MAJOR(rdev);
2925 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2926 }
2927 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2928 data->arg.ftype = NF4CHR;
2929 data->arg.u.device.specdata1 = MAJOR(rdev);
2930 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2931 }
1da177e4 2932
57dc9a57
TM		 2933 status = nfs4_do_create(dir, dentry, data);
2934
2935 nfs4_free_createdata(data);
2936out:
1da177e4
LT		 2937 return status;
2938}
2939
2940static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2941 struct iattr *sattr, dev_t rdev)
2942{
2943 struct nfs4_exception exception = { };
2944 int err;
2945 do {
2946 err = nfs4_handle_exception(NFS_SERVER(dir),
2947 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2948 &exception);
2949 } while (exception.retry);
2950 return err;
2951}
2952
2953static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2954 struct nfs_fsstat *fsstat)
2955{
2956 struct nfs4_statfs_arg args = {
2957 .fh = fhandle,
2958 .bitmask = server->attr_bitmask,
2959 };
24ad148a
BH		 2960 struct nfs4_statfs_res res = {
2961 .fsstat = fsstat,
2962 };
1da177e4
LT		 2963 struct rpc_message msg = {
2964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2965 .rpc_argp = &args,
24ad148a 2966 .rpc_resp = &res,
1da177e4
LT		 2967 };
2968
0e574af1 2969 nfs_fattr_init(fsstat->fattr);
cccef3b9 2970 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2971}
2972
2973static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2974{
2975 struct nfs4_exception exception = { };
2976 int err;
2977 do {
2978 err = nfs4_handle_exception(server,
2979 _nfs4_proc_statfs(server, fhandle, fsstat),
2980 &exception);
2981 } while (exception.retry);
2982 return err;
2983}
2984
2985static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2986 struct nfs_fsinfo *fsinfo)
2987{
2988 struct nfs4_fsinfo_arg args = {
2989 .fh = fhandle,
2990 .bitmask = server->attr_bitmask,
2991 };
3dda5e43
BH		 2992 struct nfs4_fsinfo_res res = {
2993 .fsinfo = fsinfo,
2994 };
1da177e4
LT		 2995 struct rpc_message msg = {
2996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2997 .rpc_argp = &args,
3dda5e43 2998 .rpc_resp = &res,
1da177e4
LT		 2999 };
3000
cccef3b9 3001 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3002}
3003
3004static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3005{
3006 struct nfs4_exception exception = { };
3007 int err;
3008
3009 do {
3010 err = nfs4_handle_exception(server,
3011 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3012 &exception);
3013 } while (exception.retry);
3014 return err;
3015}
3016
3017static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3018{
0e574af1 3019 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3020 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3021}
3022
3023static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3024 struct nfs_pathconf *pathconf)
3025{
3026 struct nfs4_pathconf_arg args = {
3027 .fh = fhandle,
3028 .bitmask = server->attr_bitmask,
3029 };
d45b2989
BH		 3030 struct nfs4_pathconf_res res = {
3031 .pathconf = pathconf,
3032 };
1da177e4
LT		 3033 struct rpc_message msg = {
3034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3035 .rpc_argp = &args,
d45b2989 3036 .rpc_resp = &res,
1da177e4
LT		 3037 };
3038
3039 /* None of the pathconf attributes are mandatory to implement */
3040 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3041 memset(pathconf, 0, sizeof(*pathconf));
3042 return 0;
3043 }
3044
0e574af1 3045 nfs_fattr_init(pathconf->fattr);
cccef3b9 3046 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3047}
3048
3049static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3050 struct nfs_pathconf *pathconf)
3051{
3052 struct nfs4_exception exception = { };
3053 int err;
3054
3055 do {
3056 err = nfs4_handle_exception(server,
3057 _nfs4_proc_pathconf(server, fhandle, pathconf),
3058 &exception);
3059 } while (exception.retry);
3060 return err;
3061}
3062
ec06c096 3063static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3064{
ec06c096 3065 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3066
f11c88af
AA		 3067 dprintk("--> %s\n", __func__);
3068
f11c88af
AA		 3069 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3070
9e33bed5 3071 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3072 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3073 return -EAGAIN;
1da177e4 3074 }
8850df99
TM		 3075
3076 nfs_invalidate_atime(data->inode);
1da177e4 3077 if (task->tk_status > 0)
ec06c096
TM		 3078 renew_lease(server, data->timestamp);
3079 return 0;
1da177e4
LT		 3080}
3081
bdc7f021 3082static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3083{
1da177e4 3084 data->timestamp = jiffies;
bdc7f021 3085 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3086}
3087
788e7a89 3088static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3089{
1da177e4
LT		 3090 struct inode *inode = data->inode;
3091
def6ed7e
AA		 3092 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3093 task->tk_status);
3094
9e33bed5 3095 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3096 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3097 return -EAGAIN;
1da177e4 3098 }
4f9838c7 3099 if (task->tk_status >= 0) {
1da177e4 3100 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3101 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3102 }
788e7a89 3103 return 0;
1da177e4
LT		 3104}
3105
bdc7f021 3106static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3107{
bdc7f021
TM		 3108 struct nfs_server *server = NFS_SERVER(data->inode);
3109
a65318bf 3110 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3111 data->res.server = server;
1da177e4
LT		 3112 data->timestamp = jiffies;
3113
bdc7f021 3114 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3115}
3116
788e7a89 3117static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3118{
1da177e4
LT		 3119 struct inode *inode = data->inode;
3120
21d9a851
AA		 3121 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3122 task->tk_status);
9e33bed5 3123 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3124 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3125 return -EAGAIN;
1da177e4 3126 }
9e08a3c5 3127 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3128 return 0;
1da177e4
LT		 3129}
3130
bdc7f021 3131static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3132{
788e7a89 3133 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3134
a65318bf 3135 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3136 data->res.server = server;
bdc7f021 3137 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3138}
3139
3140/*
3141 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3142 * standalone procedure for queueing an asynchronous RENEW.
3143 */
963d8fe5 3144static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3145{
adfa6f98 3146 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3147 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3148
3149 if (task->tk_status < 0) {
95baa25c
TM		 3150 /* Unless we're shutting down, schedule state recovery! */
3151 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3152 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3153 return;
3154 }
3155 spin_lock(&clp->cl_lock);
3156 if (time_before(clp->cl_last_renewal,timestamp))
3157 clp->cl_last_renewal = timestamp;
3158 spin_unlock(&clp->cl_lock);
3159}
3160
963d8fe5
TM		 3161static const struct rpc_call_ops nfs4_renew_ops = {
3162 .rpc_call_done = nfs4_renew_done,
3163};
3164
adfa6f98 3165int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3166{
3167 struct rpc_message msg = {
3168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3169 .rpc_argp = clp,
b4454fe1 3170 .rpc_cred = cred,
1da177e4
LT		 3171 };
3172
3173 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3174 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3175}
3176
adfa6f98 3177int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3178{
3179 struct rpc_message msg = {
3180 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3181 .rpc_argp = clp,
b4454fe1 3182 .rpc_cred = cred,
1da177e4
LT		 3183 };
3184 unsigned long now = jiffies;
3185 int status;
3186
3187 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3188 if (status < 0)
3189 return status;
3190 spin_lock(&clp->cl_lock);
3191 if (time_before(clp->cl_last_renewal,now))
3192 clp->cl_last_renewal = now;
3193 spin_unlock(&clp->cl_lock);
3194 return 0;
3195}
3196
aa1870af
BF		 3197static inline int nfs4_server_supports_acls(struct nfs_server *server)
3198{
3199 return (server->caps & NFS_CAP_ACLS)
3200 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3201 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3202}
3203
3204/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3205 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3206 * the stack.
3207 */
3208#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3209
3210static void buf_to_pages(const void *buf, size_t buflen,
3211 struct page **pages, unsigned int *pgbase)
3212{
3213 const void *p = buf;
3214
3215 *pgbase = offset_in_page(buf);
3216 p -= *pgbase;
3217 while (p < buf + buflen) {
3218 *(pages++) = virt_to_page(p);
3219 p += PAGE_CACHE_SIZE;
3220 }
3221}
3222
e50a1c2e
BF		 3223struct nfs4_cached_acl {
3224 int cached;
3225 size_t len;
3e9d4154 3226 char data[0];
e50a1c2e
BF		 3227};
3228
3229static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3230{
3231 struct nfs_inode *nfsi = NFS_I(inode);
3232
3233 spin_lock(&inode->i_lock);
3234 kfree(nfsi->nfs4_acl);
3235 nfsi->nfs4_acl = acl;
3236 spin_unlock(&inode->i_lock);
3237}
3238
3239static void nfs4_zap_acl_attr(struct inode *inode)
3240{
3241 nfs4_set_cached_acl(inode, NULL);
3242}
3243
3244static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3245{
3246 struct nfs_inode *nfsi = NFS_I(inode);
3247 struct nfs4_cached_acl *acl;
3248 int ret = -ENOENT;
3249
3250 spin_lock(&inode->i_lock);
3251 acl = nfsi->nfs4_acl;
3252 if (acl == NULL)
3253 goto out;
3254 if (buf == NULL) /* user is just asking for length */
3255 goto out_len;
3256 if (acl->cached == 0)
3257 goto out;
3258 ret = -ERANGE; /* see getxattr(2) man page */
3259 if (acl->len > buflen)
3260 goto out;
3261 memcpy(buf, acl->data, acl->len);
3262out_len:
3263 ret = acl->len;
3264out:
3265 spin_unlock(&inode->i_lock);
3266 return ret;
3267}
3268
3269static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3270{
3271 struct nfs4_cached_acl *acl;
3272
3273 if (buf && acl_len <= PAGE_SIZE) {
3274 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3275 if (acl == NULL)
3276 goto out;
3277 acl->cached = 1;
3278 memcpy(acl->data, buf, acl_len);
3279 } else {
3280 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3281 if (acl == NULL)
3282 goto out;
3283 acl->cached = 0;
3284 }
3285 acl->len = acl_len;
3286out:
3287 nfs4_set_cached_acl(inode, acl);
3288}
3289
16b4289c 3290static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3291{
aa1870af
BF		 3292 struct page *pages[NFS4ACL_MAXPAGES];
3293 struct nfs_getaclargs args = {
3294 .fh = NFS_FH(inode),
3295 .acl_pages = pages,
3296 .acl_len = buflen,
3297 };
663c79b3
BH		 3298 struct nfs_getaclres res = {
3299 .acl_len = buflen,
3300 };
e50a1c2e 3301 void *resp_buf;
aa1870af
BF		 3302 struct rpc_message msg = {
3303 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3304 .rpc_argp = &args,
663c79b3 3305 .rpc_resp = &res,
aa1870af 3306 };
e50a1c2e 3307 struct page *localpage = NULL;
aa1870af
BF		 3308 int ret;
3309
e50a1c2e
BF		 3310 if (buflen < PAGE_SIZE) {
3311 /* As long as we're doing a round trip to the server anyway,
3312 * let's be prepared for a page of acl data. */
3313 localpage = alloc_page(GFP_KERNEL);
3314 resp_buf = page_address(localpage);
3315 if (localpage == NULL)
3316 return -ENOMEM;
3317 args.acl_pages[0] = localpage;
3318 args.acl_pgbase = 0;
663c79b3 3319 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3320 } else {
3321 resp_buf = buf;
3322 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3323 }
cccef3b9 3324 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3325 if (ret)
3326 goto out_free;
663c79b3
BH		 3327 if (res.acl_len > args.acl_len)
3328 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3329 else
663c79b3 3330 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3331 if (buf) {
3332 ret = -ERANGE;
663c79b3 3333 if (res.acl_len > buflen)
e50a1c2e
BF		 3334 goto out_free;
3335 if (localpage)
663c79b3 3336 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3337 }
663c79b3 3338 ret = res.acl_len;
e50a1c2e
BF		 3339out_free:
3340 if (localpage)
3341 __free_page(localpage);
aa1870af
BF		 3342 return ret;
3343}
3344
16b4289c
TM		 3345static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3346{
3347 struct nfs4_exception exception = { };
3348 ssize_t ret;
3349 do {
3350 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3351 if (ret >= 0)
3352 break;
3353 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3354 } while (exception.retry);
3355 return ret;
3356}
3357
e50a1c2e
BF		 3358static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3359{
3360 struct nfs_server *server = NFS_SERVER(inode);
3361 int ret;
3362
3363 if (!nfs4_server_supports_acls(server))
3364 return -EOPNOTSUPP;
3365 ret = nfs_revalidate_inode(server, inode);
3366 if (ret < 0)
3367 return ret;
3368 ret = nfs4_read_cached_acl(inode, buf, buflen);
3369 if (ret != -ENOENT)
3370 return ret;
3371 return nfs4_get_acl_uncached(inode, buf, buflen);
3372}
3373
16b4289c 3374static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3375{
3376 struct nfs_server *server = NFS_SERVER(inode);
3377 struct page *pages[NFS4ACL_MAXPAGES];
3378 struct nfs_setaclargs arg = {
3379 .fh = NFS_FH(inode),
3380 .acl_pages = pages,
3381 .acl_len = buflen,
3382 };
73c403a9 3383 struct nfs_setaclres res;
4b580ee3
BF		 3384 struct rpc_message msg = {
3385 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3386 .rpc_argp = &arg,
73c403a9 3387 .rpc_resp = &res,
4b580ee3
BF		 3388 };
3389 int ret;
3390
3391 if (!nfs4_server_supports_acls(server))
3392 return -EOPNOTSUPP;
642ac549 3393 nfs_inode_return_delegation(inode);
4b580ee3 3394 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3395 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3396 nfs_access_zap_cache(inode);
3397 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3398 return ret;
3399}
3400
16b4289c
TM		 3401static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3402{
3403 struct nfs4_exception exception = { };
3404 int err;
3405 do {
3406 err = nfs4_handle_exception(NFS_SERVER(inode),
3407 __nfs4_proc_set_acl(inode, buf, buflen),
3408 &exception);
3409 } while (exception.retry);
3410 return err;
3411}
3412
1da177e4 3413static int
8328d59f 3414_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3415{
1da177e4
LT		 3416 if (!clp || task->tk_status >= 0)
3417 return 0;
3418 switch(task->tk_status) {
9e33bed5
TM		 3419 case -NFS4ERR_ADMIN_REVOKED:
3420 case -NFS4ERR_BAD_STATEID:
3421 case -NFS4ERR_OPENMODE:
3422 if (state == NULL)
3423 break;
3424 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3425 case -NFS4ERR_STALE_CLIENTID:
3426 case -NFS4ERR_STALE_STATEID:
3427 case -NFS4ERR_EXPIRED:
5d00837b 3428 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3429 nfs4_schedule_state_recovery(clp);
e005e804 3430 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3431 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3432 task->tk_status = 0;
3433 return -EAGAIN;
4745e315
AA		 3434#if defined(CONFIG_NFS_V4_1)
3435 case -NFS4ERR_BADSESSION:
3436 case -NFS4ERR_BADSLOT:
3437 case -NFS4ERR_BAD_HIGH_SLOT:
3438 case -NFS4ERR_DEADSESSION:
3439 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3440 case -NFS4ERR_SEQ_FALSE_RETRY:
3441 case -NFS4ERR_SEQ_MISORDERED:
3442 dprintk("%s ERROR %d, Reset session\n", __func__,
3443 task->tk_status);
0b9e2d41 3444 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3445 task->tk_status = 0;
3446 return -EAGAIN;
3447#endif /* CONFIG_NFS_V4_1 */
1da177e4 3448 case -NFS4ERR_DELAY:
8328d59f
AA		 3449 if (server)
3450 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3451 case -NFS4ERR_GRACE:
1da177e4
LT		 3452 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3453 task->tk_status = 0;
3454 return -EAGAIN;
3455 case -NFS4ERR_OLD_STATEID:
3456 task->tk_status = 0;
3457 return -EAGAIN;
3458 }
3459 task->tk_status = nfs4_map_errors(task->tk_status);
3460 return 0;
3461}
3462
8328d59f
AA		 3463static int
3464nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3465{
3466 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3467}
3468
adfa6f98 3469int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3470{
3471 nfs4_verifier sc_verifier;
3472 struct nfs4_setclientid setclientid = {
3473 .sc_verifier = &sc_verifier,
3474 .sc_prog = program,
3475 };
3476 struct rpc_message msg = {
3477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3478 .rpc_argp = &setclientid,
3479 .rpc_resp = clp,
286d7d6a 3480 .rpc_cred = cred,
1da177e4 3481 };
bc4785cd 3482 __be32 *p;
1da177e4
LT		 3483 int loop = 0;
3484 int status;
3485
bc4785cd 3486 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3487 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3488 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3489
3490 for(;;) {
3491 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3492 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3493 clp->cl_ipaddr,
3494 rpc_peeraddr2str(clp->cl_rpcclient,
3495 RPC_DISPLAY_ADDR),
69dd716c
TM		 3496 rpc_peeraddr2str(clp->cl_rpcclient,
3497 RPC_DISPLAY_PROTO),
78ea323b 3498 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3499 clp->cl_id_uniquifier);
3500 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3501 sizeof(setclientid.sc_netid),
3502 rpc_peeraddr2str(clp->cl_rpcclient,
3503 RPC_DISPLAY_NETID));
1da177e4 3504 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3505 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3506 clp->cl_ipaddr, port >> 8, port & 255);
3507
3508 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3509 if (status != -NFS4ERR_CLID_INUSE)
3510 break;
3511 if (signalled())
3512 break;
3513 if (loop++ & 1)
3514 ssleep(clp->cl_lease_time + 1);
3515 else
3516 if (++clp->cl_id_uniquifier == 0)
3517 break;
3518 }
3519 return status;
3520}
3521
adfa6f98 3522static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3523{
3524 struct nfs_fsinfo fsinfo;
3525 struct rpc_message msg = {
3526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3527 .rpc_argp = clp,
3528 .rpc_resp = &fsinfo,
286d7d6a 3529 .rpc_cred = cred,
1da177e4
LT		 3530 };
3531 unsigned long now;
3532 int status;
3533
3534 now = jiffies;
3535 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3536 if (status == 0) {
3537 spin_lock(&clp->cl_lock);
3538 clp->cl_lease_time = fsinfo.lease_time * HZ;
3539 clp->cl_last_renewal = now;
3540 spin_unlock(&clp->cl_lock);
3541 }
3542 return status;
3543}
3544
adfa6f98 3545int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3546{
77e03677 3547 long timeout = 0;
51581f3b
TM		 3548 int err;
3549 do {
3550 err = _nfs4_proc_setclientid_confirm(clp, cred);
3551 switch (err) {
3552 case 0:
3553 return err;
3554 case -NFS4ERR_RESOURCE:
3555 /* The IBM lawyers misread another document! */
3556 case -NFS4ERR_DELAY:
3557 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3558 }
3559 } while (err == 0);
3560 return err;
3561}
3562
fe650407
TM		 3563struct nfs4_delegreturndata {
3564 struct nfs4_delegreturnargs args;
fa178f29 3565 struct nfs4_delegreturnres res;
fe650407
TM		 3566 struct nfs_fh fh;
3567 nfs4_stateid stateid;
26e976a8 3568 unsigned long timestamp;
fa178f29 3569 struct nfs_fattr fattr;
fe650407
TM		 3570 int rpc_status;
3571};
3572
fe650407
TM		 3573static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3574{
3575 struct nfs4_delegreturndata *data = calldata;
938e1010 3576
d61e612a
TM		 3577 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3578 task->tk_status);
938e1010 3579
79708861
RL		 3580 switch (task->tk_status) {
3581 case -NFS4ERR_STALE_STATEID:
3582 case -NFS4ERR_EXPIRED:
3583 case 0:
fa178f29 3584 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3585 break;
3586 default:
3587 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3588 -EAGAIN) {
3589 nfs_restart_rpc(task, data->res.server->nfs_client);
3590 return;
3591 }
3592 }
3593 data->rpc_status = task->tk_status;
fe650407
TM		 3594}
3595
3596static void nfs4_delegreturn_release(void *calldata)
3597{
fe650407
TM		 3598 kfree(calldata);
3599}
3600
938e1010
AA		 3601#if defined(CONFIG_NFS_V4_1)
3602static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3603{
3604 struct nfs4_delegreturndata *d_data;
3605
3606 d_data = (struct nfs4_delegreturndata *)data;
3607
3608 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3609 &d_data->args.seq_args,
3610 &d_data->res.seq_res, 1, task))
3611 return;
3612 rpc_call_start(task);
3613}
3614#endif /* CONFIG_NFS_V4_1 */
3615
c8d149f3 3616static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3617#if defined(CONFIG_NFS_V4_1)
3618 .rpc_call_prepare = nfs4_delegreturn_prepare,
3619#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3620 .rpc_call_done = nfs4_delegreturn_done,
3621 .rpc_release = nfs4_delegreturn_release,
3622};
3623
e6f81075 3624static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3625{
3626 struct nfs4_delegreturndata *data;
fa178f29 3627 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3628 struct rpc_task *task;
5138fde0
TM		 3629 struct rpc_message msg = {
3630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3631 .rpc_cred = cred,
3632 };
c970aa85
TM		 3633 struct rpc_task_setup task_setup_data = {
3634 .rpc_client = server->client,
5138fde0 3635 .rpc_message = &msg,
c970aa85
TM		 3636 .callback_ops = &nfs4_delegreturn_ops,
3637 .flags = RPC_TASK_ASYNC,
3638 };
e6f81075 3639 int status = 0;
fe650407 3640
938e1010 3641 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3642 if (data == NULL)
3643 return -ENOMEM;
3644 data->args.fhandle = &data->fh;
3645 data->args.stateid = &data->stateid;
fa178f29 3646 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3647 nfs_copy_fh(&data->fh, NFS_FH(inode));
3648 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3649 data->res.fattr = &data->fattr;
3650 data->res.server = server;
5f7dbd5c 3651 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3652 nfs_fattr_init(data->res.fattr);
26e976a8 3653 data->timestamp = jiffies;
fe650407
TM		 3654 data->rpc_status = 0;
3655
c970aa85 3656 task_setup_data.callback_data = data;
5138fde0
TM		 3657 msg.rpc_argp = &data->args,
3658 msg.rpc_resp = &data->res,
c970aa85 3659 task = rpc_run_task(&task_setup_data);
7a1218a2 3660 if (IS_ERR(task))
fe650407 3661 return PTR_ERR(task);
e6f81075
TM		 3662 if (!issync)
3663 goto out;
fe650407 3664 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3665 if (status != 0)
3666 goto out;
3667 status = data->rpc_status;
3668 if (status != 0)
3669 goto out;
3670 nfs_refresh_inode(inode, &data->fattr);
3671out:
e6b3c4db 3672 rpc_put_task(task);
fe650407 3673 return status;
1da177e4
LT		 3674}
3675
e6f81075 3676int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3677{
3678 struct nfs_server *server = NFS_SERVER(inode);
3679 struct nfs4_exception exception = { };
3680 int err;
3681 do {
e6f81075 3682 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3683 switch (err) {
3684 case -NFS4ERR_STALE_STATEID:
3685 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3686 case 0:
3687 return 0;
3688 }
3689 err = nfs4_handle_exception(server, err, &exception);
3690 } while (exception.retry);
3691 return err;
3692}
3693
3694#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3695#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3696
3697/*
3698 * sleep, with exponential backoff, and retry the LOCK operation.
3699 */
3700static unsigned long
3701nfs4_set_lock_task_retry(unsigned long timeout)
3702{
150030b7 3703 schedule_timeout_killable(timeout);
1da177e4
LT		 3704 timeout <<= 1;
3705 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3706 return NFS4_LOCK_MAXTIMEOUT;
3707 return timeout;
3708}
3709
1da177e4
LT		 3710static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3711{
3712 struct inode *inode = state->inode;
3713 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3714 struct nfs_client *clp = server->nfs_client;
911d1aaf 3715 struct nfs_lockt_args arg = {
1da177e4 3716 .fh = NFS_FH(inode),
911d1aaf 3717 .fl = request,
1da177e4 3718 };
911d1aaf
TM		 3719 struct nfs_lockt_res res = {
3720 .denied = request,
1da177e4
LT		 3721 };
3722 struct rpc_message msg = {
3723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3724 .rpc_argp = &arg,
3725 .rpc_resp = &res,
3726 .rpc_cred = state->owner->so_cred,
3727 };
1da177e4
LT		 3728 struct nfs4_lock_state *lsp;
3729 int status;
3730
911d1aaf 3731 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3732 status = nfs4_set_lock_state(state, request);
3733 if (status != 0)
3734 goto out;
3735 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3736 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3737 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3738 switch (status) {
3739 case 0:
3740 request->fl_type = F_UNLCK;
3741 break;
3742 case -NFS4ERR_DENIED:
3743 status = 0;
1da177e4 3744 }
70cc6487 3745 request->fl_ops->fl_release_private(request);
8d0a8a9d 3746out:
1da177e4
LT		 3747 return status;
3748}
3749
3750static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3751{
3752 struct nfs4_exception exception = { };
3753 int err;
3754
3755 do {
3756 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3757 _nfs4_proc_getlk(state, cmd, request),
3758 &exception);
3759 } while (exception.retry);
3760 return err;
3761}
3762
3763static int do_vfs_lock(struct file *file, struct file_lock *fl)
3764{
3765 int res = 0;
3766 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3767 case FL_POSIX:
3768 res = posix_lock_file_wait(file, fl);
3769 break;
3770 case FL_FLOCK:
3771 res = flock_lock_file_wait(file, fl);
3772 break;
3773 default:
3774 BUG();
3775 }
1da177e4
LT		 3776 return res;
3777}
3778
faf5f49c 3779struct nfs4_unlockdata {
911d1aaf
TM		 3780 struct nfs_locku_args arg;
3781 struct nfs_locku_res res;
faf5f49c
TM		 3782 struct nfs4_lock_state *lsp;
3783 struct nfs_open_context *ctx;
911d1aaf
TM		 3784 struct file_lock fl;
3785 const struct nfs_server *server;
26e976a8 3786 unsigned long timestamp;
faf5f49c
TM		 3787};
3788
911d1aaf
TM		 3789static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3790 struct nfs_open_context *ctx,
3791 struct nfs4_lock_state *lsp,
3792 struct nfs_seqid *seqid)
3793{
3794 struct nfs4_unlockdata *p;
3795 struct inode *inode = lsp->ls_state->inode;
3796
a893693c 3797 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3798 if (p == NULL)
3799 return NULL;
3800 p->arg.fh = NFS_FH(inode);
3801 p->arg.fl = &p->fl;
3802 p->arg.seqid = seqid;
c1d51931 3803 p->res.seqid = seqid;
5f7dbd5c 3804 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3805 p->arg.stateid = &lsp->ls_stateid;
3806 p->lsp = lsp;
3807 atomic_inc(&lsp->ls_count);
3808 /* Ensure we don't close file until we're done freeing locks! */
3809 p->ctx = get_nfs_open_context(ctx);
3810 memcpy(&p->fl, fl, sizeof(p->fl));
3811 p->server = NFS_SERVER(inode);
3812 return p;
3813}
3814
06f814a3 3815static void nfs4_locku_release_calldata(void *data)
faf5f49c 3816{
963d8fe5 3817 struct nfs4_unlockdata *calldata = data;
911d1aaf 3818 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3819 nfs4_put_lock_state(calldata->lsp);
3820 put_nfs_open_context(calldata->ctx);
3821 kfree(calldata);
faf5f49c
TM		 3822}
3823
963d8fe5 3824static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3825{
963d8fe5 3826 struct nfs4_unlockdata *calldata = data;
faf5f49c 3827
a893693c
AA		 3828 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3829 task->tk_status);
06f814a3
TM		 3830 if (RPC_ASSASSINATED(task))
3831 return;
faf5f49c
TM		 3832 switch (task->tk_status) {
3833 case 0:
3834 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3835 calldata->res.stateid.data,
faf5f49c 3836 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3837 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3838 break;
9e33bed5
TM		 3839 case -NFS4ERR_BAD_STATEID:
3840 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3841 case -NFS4ERR_STALE_STATEID:
3842 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3843 break;
3844 default:
9e33bed5 3845 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3846 nfs_restart_rpc(task,
d61e612a 3847 calldata->server->nfs_client);
faf5f49c 3848 }
faf5f49c
TM		 3849}
3850
4ce70ada 3851static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3852{
4ce70ada 3853 struct nfs4_unlockdata *calldata = data;
faf5f49c 3854
911d1aaf 3855 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3856 return;
3857 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3858 /* Note: exit _without_ running nfs4_locku_done */
3859 task->tk_action = NULL;
faf5f49c
TM		 3860 return;
3861 }
26e976a8 3862 calldata->timestamp = jiffies;
a893693c
AA		 3863 if (nfs4_setup_sequence(calldata->server->nfs_client,
3864 &calldata->arg.seq_args,
3865 &calldata->res.seq_res, 1, task))
3866 return;
5138fde0 3867 rpc_call_start(task);
faf5f49c
TM		 3868}
3869
963d8fe5 3870static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3871 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3872 .rpc_call_done = nfs4_locku_done,
06f814a3 3873 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3874};
3875
a5d16a4d
TM		 3876static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3877 struct nfs_open_context *ctx,
3878 struct nfs4_lock_state *lsp,
3879 struct nfs_seqid *seqid)
3880{
3881 struct nfs4_unlockdata *data;
5138fde0
TM		 3882 struct rpc_message msg = {
3883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3884 .rpc_cred = ctx->cred,
3885 };
c970aa85
TM		 3886 struct rpc_task_setup task_setup_data = {
3887 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3888 .rpc_message = &msg,
c970aa85 3889 .callback_ops = &nfs4_locku_ops,
101070ca 3890 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3891 .flags = RPC_TASK_ASYNC,
3892 };
a5d16a4d 3893
137d6aca
FF		 3894 /* Ensure this is an unlock - when canceling a lock, the
3895 * canceled lock is passed in, and it won't be an unlock.
3896 */
3897 fl->fl_type = F_UNLCK;
3898
a5d16a4d
TM		 3899 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3900 if (data == NULL) {
3901 nfs_free_seqid(seqid);
3902 return ERR_PTR(-ENOMEM);
3903 }
3904
5138fde0
TM		 3905 msg.rpc_argp = &data->arg,
3906 msg.rpc_resp = &data->res,
c970aa85
TM		 3907 task_setup_data.callback_data = data;
3908 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3909}
3910
faf5f49c
TM		 3911static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3912{
19e03c57 3913 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3914 struct nfs_seqid *seqid;
1da177e4 3915 struct nfs4_lock_state *lsp;
06f814a3
TM		 3916 struct rpc_task *task;
3917 int status = 0;
536ff0f8 3918 unsigned char fl_flags = request->fl_flags;
faf5f49c 3919
8d0a8a9d 3920 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3921 /* Unlock _before_ we do the RPC call */
3922 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3923 down_read(&nfsi->rwsem);
3924 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3925 up_read(&nfsi->rwsem);
9b073574 3926 goto out;
19e03c57
TM		 3927 }
3928 up_read(&nfsi->rwsem);
8d0a8a9d 3929 if (status != 0)
9b073574
TM		 3930 goto out;
3931 /* Is this a delegated lock? */
3932 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3933 goto out;
8d0a8a9d 3934 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3935 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3936 status = -ENOMEM;
911d1aaf 3937 if (seqid == NULL)
9b073574 3938 goto out;
cd3758e3 3939 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3940 status = PTR_ERR(task);
3941 if (IS_ERR(task))
9b073574 3942 goto out;
a5d16a4d 3943 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3944 rpc_put_task(task);
9b073574 3945out:
536ff0f8 3946 request->fl_flags = fl_flags;
1da177e4
LT		 3947 return status;
3948}
3949
a5d16a4d
TM		 3950struct nfs4_lockdata {
3951 struct nfs_lock_args arg;
3952 struct nfs_lock_res res;
3953 struct nfs4_lock_state *lsp;
3954 struct nfs_open_context *ctx;
3955 struct file_lock fl;
26e976a8 3956 unsigned long timestamp;
a5d16a4d
TM		 3957 int rpc_status;
3958 int cancelled;
66179efe 3959 struct nfs_server *server;
a5d16a4d
TM		 3960};
3961
3962static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3963 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3964{
a5d16a4d
TM		 3965 struct nfs4_lockdata *p;
3966 struct inode *inode = lsp->ls_state->inode;
1da177e4 3967 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3968
3969 p = kzalloc(sizeof(*p), GFP_KERNEL);
3970 if (p == NULL)
3971 return NULL;
3972
3973 p->arg.fh = NFS_FH(inode);
3974 p->arg.fl = &p->fl;
2f74c0a0
TM		 3975 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3976 if (p->arg.open_seqid == NULL)
3977 goto out_free;
a5d16a4d
TM		 3978 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3979 if (p->arg.lock_seqid == NULL)
2f74c0a0 3980 goto out_free_seqid;
a5d16a4d 3981 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3982 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3983 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3984 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3985 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3986 p->lsp = lsp;
66179efe 3987 p->server = server;
a5d16a4d
TM		 3988 atomic_inc(&lsp->ls_count);
3989 p->ctx = get_nfs_open_context(ctx);
3990 memcpy(&p->fl, fl, sizeof(p->fl));
3991 return p;
2f74c0a0
TM		 3992out_free_seqid:
3993 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3994out_free:
3995 kfree(p);
3996 return NULL;
3997}
3998
3999static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4000{
4001 struct nfs4_lockdata *data = calldata;
4002 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4003
3110ff80 4004 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4005 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4006 return;
a5d16a4d
TM		 4007 /* Do we need to do an open_to_lock_owner? */
4008 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4009 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4010 return;
a5d16a4d
TM		 4011 data->arg.open_stateid = &state->stateid;
4012 data->arg.new_lock_owner = 1;
c1d51931 4013 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4014 } else
4015 data->arg.new_lock_owner = 0;
26e976a8 4016 data->timestamp = jiffies;
66179efe
AA		 4017 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
4018 &data->res.seq_res, 1, task))
4019 return;
5138fde0 4020 rpc_call_start(task);
3110ff80 4021 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4022}
4023
b257957e
AB		 4024static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4025{
4026 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4027 nfs4_lock_prepare(task, calldata);
4028}
4029
a5d16a4d
TM		 4030static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4031{
4032 struct nfs4_lockdata *data = calldata;
4033
3110ff80 4034 dprintk("%s: begin!\n", __func__);
a5d16a4d 4035
d61e612a
TM		 4036 nfs4_sequence_done(data->server, &data->res.seq_res,
4037 task->tk_status);
66179efe 4038
a5d16a4d
TM		 4039 data->rpc_status = task->tk_status;
4040 if (RPC_ASSASSINATED(task))
4041 goto out;
4042 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4043 if (data->rpc_status == 0)
4044 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4045 else
4046 goto out;
4047 }
4048 if (data->rpc_status == 0) {
4049 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4050 sizeof(data->lsp->ls_stateid.data));
4051 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4052 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4053 }
a5d16a4d 4054out:
3110ff80 4055 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4056}
4057
4058static void nfs4_lock_release(void *calldata)
4059{
4060 struct nfs4_lockdata *data = calldata;
4061
3110ff80 4062 dprintk("%s: begin!\n", __func__);
2f74c0a0 4063 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4064 if (data->cancelled != 0) {
4065 struct rpc_task *task;
4066 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4067 data->arg.lock_seqid);
4068 if (!IS_ERR(task))
e6b3c4db 4069 rpc_put_task(task);
3110ff80 4070 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4071 } else
4072 nfs_free_seqid(data->arg.lock_seqid);
4073 nfs4_put_lock_state(data->lsp);
4074 put_nfs_open_context(data->ctx);
4075 kfree(data);
3110ff80 4076 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4077}
4078
4079static const struct rpc_call_ops nfs4_lock_ops = {
4080 .rpc_call_prepare = nfs4_lock_prepare,
4081 .rpc_call_done = nfs4_lock_done,
4082 .rpc_release = nfs4_lock_release,
4083};
4084
b257957e
AB		 4085static const struct rpc_call_ops nfs4_recover_lock_ops = {
4086 .rpc_call_prepare = nfs4_recover_lock_prepare,
4087 .rpc_call_done = nfs4_lock_done,
4088 .rpc_release = nfs4_lock_release,
4089};
4090
afe6c27c 4091static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4092{
4093 struct nfs4_lockdata *data;
4094 struct rpc_task *task;
5138fde0
TM		 4095 struct rpc_message msg = {
4096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4097 .rpc_cred = state->owner->so_cred,
4098 };
c970aa85
TM		 4099 struct rpc_task_setup task_setup_data = {
4100 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4101 .rpc_message = &msg,
c970aa85 4102 .callback_ops = &nfs4_lock_ops,
101070ca 4103 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4104 .flags = RPC_TASK_ASYNC,
4105 };
a5d16a4d
TM		 4106 int ret;
4107
3110ff80 4108 dprintk("%s: begin!\n", __func__);
cd3758e3 4109 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 4110 fl->fl_u.nfs4_fl.owner);
4111 if (data == NULL)
4112 return -ENOMEM;
4113 if (IS_SETLKW(cmd))
4114 data->arg.block = 1;
b257957e
AB		 4115 if (recovery_type > NFS_LOCK_NEW) {
4116 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4117 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4118 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4119 }
5138fde0
TM		 4120 msg.rpc_argp = &data->arg,
4121 msg.rpc_resp = &data->res,
c970aa85
TM		 4122 task_setup_data.callback_data = data;
4123 task = rpc_run_task(&task_setup_data);
7a1218a2 4124 if (IS_ERR(task))
a5d16a4d 4125 return PTR_ERR(task);
a5d16a4d
TM		 4126 ret = nfs4_wait_for_completion_rpc_task(task);
4127 if (ret == 0) {
4128 ret = data->rpc_status;
a5d16a4d
TM		 4129 } else
4130 data->cancelled = 1;
e6b3c4db 4131 rpc_put_task(task);
3110ff80 4132 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4133 return ret;
1da177e4
LT		 4134}
4135
4136static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4137{
202b50dc
TM		 4138 struct nfs_server *server = NFS_SERVER(state->inode);
4139 struct nfs4_exception exception = { };
4140 int err;
4141
4142 do {
42a2d13e
TM		 4143 /* Cache the lock if possible... */
4144 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4145 return 0;
afe6c27c 4146 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
202b50dc
TM		 4147 if (err != -NFS4ERR_DELAY)
4148 break;
4149 nfs4_handle_exception(server, err, &exception);
4150 } while (exception.retry);
4151 return err;
1da177e4
LT		 4152}
4153
4154static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4155{
202b50dc
TM		 4156 struct nfs_server *server = NFS_SERVER(state->inode);
4157 struct nfs4_exception exception = { };
4158 int err;
4159
6bfc93ef
TM		 4160 err = nfs4_set_lock_state(state, request);
4161 if (err != 0)
4162 return err;
202b50dc 4163 do {
42a2d13e
TM		 4164 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4165 return 0;
afe6c27c 4166 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4167 switch (err) {
4168 default:
4169 goto out;
4170 case -NFS4ERR_GRACE:
4171 case -NFS4ERR_DELAY:
4172 nfs4_handle_exception(server, err, &exception);
4173 err = 0;
4174 }
202b50dc 4175 } while (exception.retry);
a9ed2e25 4176out:
202b50dc 4177 return err;
1da177e4
LT		 4178}
4179
4180static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4181{
19e03c57 4182 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4183 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4184 int status;
4185
6bfc93ef 4186 /* Is this a delegated open? */
6bfc93ef
TM		 4187 status = nfs4_set_lock_state(state, request);
4188 if (status != 0)
4189 goto out;
01c3b861
TM		 4190 request->fl_flags |= FL_ACCESS;
4191 status = do_vfs_lock(request->fl_file, request);
4192 if (status < 0)
4193 goto out;
19e03c57 4194 down_read(&nfsi->rwsem);
01c3b861 4195 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4196 /* Yes: cache locks! */
01c3b861 4197 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4198 request->fl_flags = fl_flags & ~FL_SLEEP;
4199 status = do_vfs_lock(request->fl_file, request);
4200 goto out_unlock;
01c3b861 4201 }
afe6c27c 4202 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4203 if (status != 0)
01c3b861 4204 goto out_unlock;
6bfc93ef 4205 /* Note: we always want to sleep here! */
01c3b861 4206 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4207 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4208 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4209out_unlock:
19e03c57 4210 up_read(&nfsi->rwsem);
01c3b861
TM		 4211out:
4212 request->fl_flags = fl_flags;
1da177e4
LT		 4213 return status;
4214}
4215
4216static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4217{
4218 struct nfs4_exception exception = { };
4219 int err;
4220
4221 do {
965b5d67
TM		 4222 err = _nfs4_proc_setlk(state, cmd, request);
4223 if (err == -NFS4ERR_DENIED)
4224 err = -EAGAIN;
1da177e4 4225 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4226 err, &exception);
1da177e4
LT		 4227 } while (exception.retry);
4228 return err;
4229}
4230
4231static int
4232nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4233{
4234 struct nfs_open_context *ctx;
4235 struct nfs4_state *state;
4236 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4237 int status;
4238
4239 /* verify open state */
cd3758e3 4240 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4241 state = ctx->state;
4242
4243 if (request->fl_start < 0 || request->fl_end < 0)
4244 return -EINVAL;
4245
d953126a
TM		 4246 if (IS_GETLK(cmd)) {
4247 if (state != NULL)
4248 return nfs4_proc_getlk(state, F_GETLK, request);
4249 return 0;
4250 }
1da177e4
LT		 4251
4252 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4253 return -EINVAL;
4254
d953126a
TM		 4255 if (request->fl_type == F_UNLCK) {
4256 if (state != NULL)
4257 return nfs4_proc_unlck(state, cmd, request);
4258 return 0;
4259 }
1da177e4 4260
d953126a
TM		 4261 if (state == NULL)
4262 return -ENOLCK;
1da177e4
LT		 4263 do {
4264 status = nfs4_proc_setlk(state, cmd, request);
4265 if ((status != -EAGAIN) || IS_SETLK(cmd))
4266 break;
4267 timeout = nfs4_set_lock_task_retry(timeout);
4268 status = -ERESTARTSYS;
4269 if (signalled())
4270 break;
4271 } while(status < 0);
1da177e4
LT		 4272 return status;
4273}
4274
888e694c
TM		 4275int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4276{
4277 struct nfs_server *server = NFS_SERVER(state->inode);
4278 struct nfs4_exception exception = { };
4279 int err;
4280
4281 err = nfs4_set_lock_state(state, fl);
4282 if (err != 0)
4283 goto out;
4284 do {
afe6c27c 4285 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4286 switch (err) {
4287 default:
4288 printk(KERN_ERR "%s: unhandled error %d.\n",
4289 __func__, err);
4290 case 0:
965b5d67 4291 case -ESTALE:
d5122201
TM		 4292 goto out;
4293 case -NFS4ERR_EXPIRED:
4294 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4295 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4296 case -NFS4ERR_BADSESSION:
4297 case -NFS4ERR_BADSLOT:
4298 case -NFS4ERR_BAD_HIGH_SLOT:
4299 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4300 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4301 nfs4_schedule_state_recovery(server->nfs_client);
4302 goto out;
965b5d67
TM		 4303 case -ERESTARTSYS:
4304 /*
4305 * The show must go on: exit, but mark the
4306 * stateid as needing recovery.
4307 */
4308 case -NFS4ERR_ADMIN_REVOKED:
4309 case -NFS4ERR_BAD_STATEID:
4310 case -NFS4ERR_OPENMODE:
4311 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4312 err = 0;
4313 goto out;
4314 case -ENOMEM:
4315 case -NFS4ERR_DENIED:
4316 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4317 err = 0;
4318 goto out;
d5122201
TM		 4319 case -NFS4ERR_DELAY:
4320 break;
4321 }
888e694c
TM		 4322 err = nfs4_handle_exception(server, err, &exception);
4323 } while (exception.retry);
4324out:
4325 return err;
4326}
6b3b5496 4327
aa1870af
BF		 4328#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4329
6b3b5496
BF		 4330int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4331 size_t buflen, int flags)
4332{
4b580ee3
BF		 4333 struct inode *inode = dentry->d_inode;
4334
4335 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4336 return -EOPNOTSUPP;
4337
4b580ee3 4338 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4339}
4340
4341/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4342 * and that's what we'll do for e.g. user attributes that haven't been set.
4343 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4344 * attributes in kernel-managed attribute namespaces. */
4345ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4346 size_t buflen)
4347{
aa1870af
BF		 4348 struct inode *inode = dentry->d_inode;
4349
4350 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4351 return -EOPNOTSUPP;
4352
4353 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4354}
4355
4356ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4357{
aa1870af 4358 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4359
096455a2
BF		 4360 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4361 return 0;
6b3b5496
BF		 4362 if (buf && buflen < len)
4363 return -ERANGE;
4364 if (buf)
aa1870af
BF		 4365 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4366 return len;
6b3b5496
BF		 4367}
4368
69aaaae1
TM		 4369static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4370{
4371 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4372 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4373 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4374 return;
4375
4376 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4377 NFS_ATTR_FATTR_NLINK;
4378 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4379 fattr->nlink = 2;
4380}
4381
56659e99 4382int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4383 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4384{
4385 struct nfs_server *server = NFS_SERVER(dir);
4386 u32 bitmask[2] = {
361e624f
MN		 4387 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4388 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4389 };
4390 struct nfs4_fs_locations_arg args = {
4391 .dir_fh = NFS_FH(dir),
c228fd3a 4392 .name = name,
683b57b4
TM		 4393 .page = page,
4394 .bitmask = bitmask,
4395 };
22958463
BH		 4396 struct nfs4_fs_locations_res res = {
4397 .fs_locations = fs_locations,
4398 };
683b57b4
TM		 4399 struct rpc_message msg = {
4400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4401 .rpc_argp = &args,
22958463 4402 .rpc_resp = &res,
683b57b4
TM		 4403 };
4404 int status;
4405
3110ff80 4406 dprintk("%s: start\n", __func__);
c228fd3a 4407 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4408 fs_locations->server = server;
830b8e33 4409 fs_locations->nlocations = 0;
cccef3b9 4410 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4411 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4412 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4413 return status;
4414}
4415
557134a3 4416#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4417/*
4418 * nfs4_proc_exchange_id()
4419 *
4420 * Since the clientid has expired, all compounds using sessions
4421 * associated with the stale clientid will be returning
4422 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4423 * be in some phase of session reset.
4424 */
4d643d1d 4425int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4426{
4427 nfs4_verifier verifier;
4428 struct nfs41_exchange_id_args args = {
4429 .client = clp,
4430 .flags = clp->cl_exchange_flags,
4431 };
4432 struct nfs41_exchange_id_res res = {
4433 .client = clp,
4434 };
4435 int status;
4436 struct rpc_message msg = {
4437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4438 .rpc_argp = &args,
4439 .rpc_resp = &res,
4440 .rpc_cred = cred,
4441 };
4442 __be32 *p;
4443
4444 dprintk("--> %s\n", __func__);
4445 BUG_ON(clp == NULL);
a7b72103 4446
7b183d0d
AB		 4447 /* Remove server-only flags */
4448 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4449
99fe60d0
BH		 4450 p = (u32 *)verifier.data;
4451 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4452 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4453 args.verifier = &verifier;
4454
4455 while (1) {
4456 args.id_len = scnprintf(args.id, sizeof(args.id),
4457 "%s/%s %u",
4458 clp->cl_ipaddr,
4459 rpc_peeraddr2str(clp->cl_rpcclient,
4460 RPC_DISPLAY_ADDR),
4461 clp->cl_id_uniquifier);
4462
4463 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4464
4465 if (status != NFS4ERR_CLID_INUSE)
4466 break;
4467
4468 if (signalled())
4469 break;
4470
4471 if (++clp->cl_id_uniquifier == 0)
4472 break;
4473 }
4474
4475 dprintk("<-- %s status= %d\n", __func__, status);
4476 return status;
4477}
4478
2050f0cc
AA		 4479struct nfs4_get_lease_time_data {
4480 struct nfs4_get_lease_time_args *args;
4481 struct nfs4_get_lease_time_res *res;
4482 struct nfs_client *clp;
4483};
4484
4485static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4486 void *calldata)
4487{
4488 int ret;
4489 struct nfs4_get_lease_time_data *data =
4490 (struct nfs4_get_lease_time_data *)calldata;
4491
4492 dprintk("--> %s\n", __func__);
689cf5c1 4493 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4494 /* just setup sequence, do not trigger session recovery
4495 since we're invoked within one */
4496 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4497 &data->args->la_seq_args,
4498 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4499
4500 BUG_ON(ret == -EAGAIN);
4501 rpc_call_start(task);
4502 dprintk("<-- %s\n", __func__);
4503}
4504
4505/*
4506 * Called from nfs4_state_manager thread for session setup, so don't recover
4507 * from sequence operation or clientid errors.
4508 */
4509static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4510{
4511 struct nfs4_get_lease_time_data *data =
4512 (struct nfs4_get_lease_time_data *)calldata;
4513
4514 dprintk("--> %s\n", __func__);
4515 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4516 switch (task->tk_status) {
4517 case -NFS4ERR_DELAY:
4518 case -NFS4ERR_GRACE:
4519 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4520 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4521 task->tk_status = 0;
0110ee15 4522 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4523 return;
4524 }
2050f0cc
AA		 4525 dprintk("<-- %s\n", __func__);
4526}
4527
4528struct rpc_call_ops nfs4_get_lease_time_ops = {
4529 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4530 .rpc_call_done = nfs4_get_lease_time_done,
4531};
4532
4533int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4534{
4535 struct rpc_task *task;
4536 struct nfs4_get_lease_time_args args;
4537 struct nfs4_get_lease_time_res res = {
4538 .lr_fsinfo = fsinfo,
4539 };
4540 struct nfs4_get_lease_time_data data = {
4541 .args = &args,
4542 .res = &res,
4543 .clp = clp,
4544 };
4545 struct rpc_message msg = {
4546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4547 .rpc_argp = &args,
4548 .rpc_resp = &res,
4549 };
4550 struct rpc_task_setup task_setup = {
4551 .rpc_client = clp->cl_rpcclient,
4552 .rpc_message = &msg,
4553 .callback_ops = &nfs4_get_lease_time_ops,
4554 .callback_data = &data
4555 };
4556 int status;
4557
4558 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4559 dprintk("--> %s\n", __func__);
4560 task = rpc_run_task(&task_setup);
4561
4562 if (IS_ERR(task))
4563 status = PTR_ERR(task);
4564 else {
4565 status = task->tk_status;
4566 rpc_put_task(task);
4567 }
4568 dprintk("<-- %s return %d\n", __func__, status);
4569
4570 return status;
4571}
4572
b73dafa7
RL		 4573/*
4574 * Reset a slot table
4575 */
4576static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4577 int old_max_slots, int ivalue)
ac72b7b3 4578{
b73dafa7 4579 int i;
ac72b7b3
AA		 4580 int ret = 0;
4581
b73dafa7 4582 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4583
b73dafa7
RL		 4584 /*
4585 * Until we have dynamic slot table adjustment, insist
4586 * upon the same slot table size
4587 */
ac72b7b3
AA		 4588 if (max_slots != old_max_slots) {
4589 dprintk("%s reset slot table does't match old\n",
4590 __func__);
4591 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4592 goto out;
4593 }
4594 spin_lock(&tbl->slot_tbl_lock);
4595 for (i = 0; i < max_slots; ++i)
b73dafa7 4596 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4597 spin_unlock(&tbl->slot_tbl_lock);
4598 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4599 tbl, tbl->slots, tbl->max_slots);
4600out:
4601 dprintk("<-- %s: return %d\n", __func__, ret);
4602 return ret;
4603}
4604
b73dafa7
RL		 4605/*
4606 * Reset the forechannel and backchannel slot tables
4607 */
4608static int nfs4_reset_slot_tables(struct nfs4_session *session)
4609{
4610 int status;
4611
4612 status = nfs4_reset_slot_table(&session->fc_slot_table,
4613 session->fc_attrs.max_reqs,
4614 session->fc_slot_table.max_slots,
4615 1);
f8625a6a
RL		 4616 if (status)
4617 return status;
4618
4619 status = nfs4_reset_slot_table(&session->bc_slot_table,
4620 session->bc_attrs.max_reqs,
4621 session->bc_slot_table.max_slots,
4622 0);
b73dafa7
RL		 4623 return status;
4624}
4625
f8625a6a
RL		 4626/* Destroy the slot table */
4627static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4628{
4629 if (session->fc_slot_table.slots != NULL) {
4630 kfree(session->fc_slot_table.slots);
4631 session->fc_slot_table.slots = NULL;
4632 }
4633 if (session->bc_slot_table.slots != NULL) {
4634 kfree(session->bc_slot_table.slots);
4635 session->bc_slot_table.slots = NULL;
4636 }
4637 return;
4638}
4639
fc931582
AA		 4640/*
4641 * Initialize slot table
4642 */
050047ce
RL		 4643static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4644 int max_slots, int ivalue)
fc931582 4645{
fc931582
AA		 4646 struct nfs4_slot *slot;
4647 int ret = -ENOMEM;
4648
4649 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4650
050047ce 4651 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4652
4653 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4654 if (!slot)
4655 goto out;
fc931582
AA		 4656 ret = 0;
4657
4658 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4659 tbl->max_slots = max_slots;
4660 tbl->slots = slot;
4661 tbl->highest_used_slotid = -1; /* no slot is currently used */
4662 spin_unlock(&tbl->slot_tbl_lock);
4663 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4664 tbl, tbl->slots, tbl->max_slots);
4665out:
4666 dprintk("<-- %s: return %d\n", __func__, ret);
4667 return ret;
fc931582
AA		 4668}
4669
050047ce
RL		 4670/*
4671 * Initialize the forechannel and backchannel tables
4672 */
4673static int nfs4_init_slot_tables(struct nfs4_session *session)
4674{
f26468fb
TM		 4675 struct nfs4_slot_table *tbl;
4676 int status = 0;
050047ce 4677
f26468fb
TM		 4678 tbl = &session->fc_slot_table;
4679 if (tbl->slots == NULL) {
4680 status = nfs4_init_slot_table(tbl,
4681 session->fc_attrs.max_reqs, 1);
4682 if (status)
4683 return status;
4684 }
050047ce 4685
f26468fb
TM		 4686 tbl = &session->bc_slot_table;
4687 if (tbl->slots == NULL) {
4688 status = nfs4_init_slot_table(tbl,
4689 session->bc_attrs.max_reqs, 0);
4690 if (status)
4691 nfs4_destroy_slot_tables(session);
4692 }
f8625a6a
RL		 4693
4694 return status;
557134a3
AA		 4695}
4696
4697struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4698{
4699 struct nfs4_session *session;
4700 struct nfs4_slot_table *tbl;
4701
4702 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4703 if (!session)
4704 return NULL;
76db6d95 4705
76db6d95
AA		 4706 /*
4707 * The create session reply races with the server back
4708 * channel probe. Mark the client NFS_CS_SESSION_INITING
4709 * so that the client back channel can find the
4710 * nfs_client struct
4711 */
4712 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4713 init_completion(&session->complete);
76db6d95 4714
557134a3 4715 tbl = &session->fc_slot_table;
9dfdf404 4716 tbl->highest_used_slotid = -1;
557134a3 4717 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4718 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4719
4720 tbl = &session->bc_slot_table;
9dfdf404 4721 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4722 spin_lock_init(&tbl->slot_tbl_lock);
4723 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4724
557134a3
AA		 4725 session->clp = clp;
4726 return session;
4727}
4728
4729void nfs4_destroy_session(struct nfs4_session *session)
4730{
5a0ffe54
AA		 4731 nfs4_proc_destroy_session(session);
4732 dprintk("%s Destroy backchannel for xprt %p\n",
4733 __func__, session->clp->cl_rpcclient->cl_xprt);
4734 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4735 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4736 nfs4_destroy_slot_tables(session);
557134a3
AA		 4737 kfree(session);
4738}
4739
fc931582
AA		 4740/*
4741 * Initialize the values to be used by the client in CREATE_SESSION
4742 * If nfs4_init_session set the fore channel request and response sizes,
4743 * use them.
4744 *
4745 * Set the back channel max_resp_sz_cached to zero to force the client to
4746 * always set csa_cachethis to FALSE because the current implementation
4747 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4748 */
4749static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4750{
4751 struct nfs4_session *session = args->client->cl_session;
4752 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4753 mxresp_sz = session->fc_attrs.max_resp_sz;
4754
4755 if (mxrqst_sz == 0)
4756 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4757 if (mxresp_sz == 0)
4758 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4759 /* Fore channel attributes */
4760 args->fc_attrs.headerpadsz = 0;
4761 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4762 args->fc_attrs.max_resp_sz = mxresp_sz;
4763 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4764 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4765 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4766
4767 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4768 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4769 __func__,
4770 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4771 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4772 args->fc_attrs.max_reqs);
4773
4774 /* Back channel attributes */
4775 args->bc_attrs.headerpadsz = 0;
4776 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4777 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4778 args->bc_attrs.max_resp_sz_cached = 0;
4779 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4780 args->bc_attrs.max_reqs = 1;
4781
4782 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4783 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4784 __func__,
4785 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4786 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4787 args->bc_attrs.max_reqs);
4788}
4789
8d35301d
AA		 4790static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4791{
4792 if (rcvd <= sent)
4793 return 0;
4794 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4795 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4796 return -EINVAL;
4797}
4798
4799#define _verify_fore_channel_attr(_name_) \
4800 _verify_channel_attr("fore", #_name_, \
4801 args->fc_attrs._name_, \
4802 session->fc_attrs._name_)
4803
4804#define _verify_back_channel_attr(_name_) \
4805 _verify_channel_attr("back", #_name_, \
4806 args->bc_attrs._name_, \
4807 session->bc_attrs._name_)
4808
4809/*
4810 * The server is not allowed to increase the fore channel header pad size,
4811 * maximum response size, or maximum number of operations.
4812 *
4813 * The back channel attributes are only negotiatied down: We send what the
4814 * (back channel) server insists upon.
4815 */
4816static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4817 struct nfs4_session *session)
4818{
4819 int ret = 0;
4820
4821 ret |= _verify_fore_channel_attr(headerpadsz);
4822 ret |= _verify_fore_channel_attr(max_resp_sz);
4823 ret |= _verify_fore_channel_attr(max_ops);
4824
4825 ret |= _verify_back_channel_attr(headerpadsz);
4826 ret |= _verify_back_channel_attr(max_rqst_sz);
4827 ret |= _verify_back_channel_attr(max_resp_sz);
4828 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4829 ret |= _verify_back_channel_attr(max_ops);
4830 ret |= _verify_back_channel_attr(max_reqs);
4831
4832 return ret;
4833}
4834
fc931582
AA		 4835static int _nfs4_proc_create_session(struct nfs_client *clp)
4836{
4837 struct nfs4_session *session = clp->cl_session;
4838 struct nfs41_create_session_args args = {
4839 .client = clp,
4840 .cb_program = NFS4_CALLBACK,
4841 };
4842 struct nfs41_create_session_res res = {
4843 .client = clp,
4844 };
4845 struct rpc_message msg = {
4846 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4847 .rpc_argp = &args,
4848 .rpc_resp = &res,
4849 };
4850 int status;
4851
4852 nfs4_init_channel_attrs(&args);
0f91421e 4853 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4854
4855 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4856
8d35301d
AA		 4857 if (!status)
4858 /* Verify the session's negotiated channel_attrs values */
4859 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4860 if (!status) {
4861 /* Increment the clientid slot sequence id */
4862 clp->cl_seqid++;
4863 }
4864
4865 return status;
4866}
4867
4868/*
4869 * Issues a CREATE_SESSION operation to the server.
4870 * It is the responsibility of the caller to verify the session is
4871 * expired before calling this routine.
4872 */
f26468fb 4873int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4874{
4875 int status;
4876 unsigned *ptr;
fc931582
AA		 4877 struct nfs4_session *session = clp->cl_session;
4878
4879 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4880
4881 status = _nfs4_proc_create_session(clp);
4882 if (status)
4883 goto out;
4884
f26468fb
TM		 4885 /* Init and reset the fore channel */
4886 status = nfs4_init_slot_tables(session);
4887 dprintk("slot table initialization returned %d\n", status);
4888 if (status)
4889 goto out;
4890 status = nfs4_reset_slot_tables(session);
4891 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4892 if (status)
4893 goto out;
4894
4895 ptr = (unsigned *)&session->sess_id.data[0];
4896 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4897 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4898out:
4899 dprintk("<-- %s\n", __func__);
4900 return status;
4901}
4902
0f3e66c6
AA		 4903/*
4904 * Issue the over-the-wire RPC DESTROY_SESSION.
4905 * The caller must serialize access to this routine.
4906 */
4907int nfs4_proc_destroy_session(struct nfs4_session *session)
4908{
4909 int status = 0;
4910 struct rpc_message msg;
4911
4912 dprintk("--> nfs4_proc_destroy_session\n");
4913
4914 /* session is still being setup */
4915 if (session->clp->cl_cons_state != NFS_CS_READY)
4916 return status;
4917
4918 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4919 msg.rpc_argp = session;
4920 msg.rpc_resp = NULL;
4921 msg.rpc_cred = NULL;
4922 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4923
4924 if (status)
4925 printk(KERN_WARNING
4926 "Got error %d from the server on DESTROY_SESSION. "
4927 "Session has been destroyed regardless...\n", status);
4928
4929 dprintk("<-- nfs4_proc_destroy_session\n");
4930 return status;
4931}
4932
fccba804
TM		 4933int nfs4_init_session(struct nfs_server *server)
4934{
4935 struct nfs_client *clp = server->nfs_client;
2449ea2e 4936 struct nfs4_session *session;
68bf05ef 4937 unsigned int rsize, wsize;
fccba804
TM		 4938 int ret;
4939
4940 if (!nfs4_has_session(clp))
4941 return 0;
4942
68bf05ef
AA		 4943 rsize = server->rsize;
4944 if (rsize == 0)
4945 rsize = NFS_MAX_FILE_IO_SIZE;
4946 wsize = server->wsize;
4947 if (wsize == 0)
4948 wsize = NFS_MAX_FILE_IO_SIZE;
4949
2449ea2e 4950 session = clp->cl_session;
68bf05ef
AA		 4951 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
4952 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 4953
fccba804
TM		 4954 ret = nfs4_recover_expired_lease(server);
4955 if (!ret)
4956 ret = nfs4_check_client_ready(clp);
4957 return ret;
4958}
4959
fc01cea9
AA		 4960/*
4961 * Renew the cl_session lease.
4962 */
4963static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4964{
4965 struct nfs4_sequence_args args;
4966 struct nfs4_sequence_res res;
4967
4968 struct rpc_message msg = {
4969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4970 .rpc_argp = &args,
4971 .rpc_resp = &res,
4972 .rpc_cred = cred,
4973 };
4974
4975 args.sa_cache_this = 0;
4976
4977 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
b257957e 4978 &res, args.sa_cache_this, 1);
fc01cea9
AA		 4979}
4980
4981void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4982{
4983 struct nfs_client *clp = (struct nfs_client *)data;
4984
4985 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4986
4987 if (task->tk_status < 0) {
4988 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4989
4990 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4991 == -EAGAIN) {
0110ee15 4992 nfs_restart_rpc(task, clp);
fc01cea9
AA		 4993 return;
4994 }
4995 }
fc01cea9
AA		 4996 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4997
fc01cea9
AA		 4998 kfree(task->tk_msg.rpc_argp);
4999 kfree(task->tk_msg.rpc_resp);
5000
5001 dprintk("<-- %s\n", __func__);
5002}
5003
5004static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5005{
5006 struct nfs_client *clp;
5007 struct nfs4_sequence_args *args;
5008 struct nfs4_sequence_res *res;
5009
5010 clp = (struct nfs_client *)data;
5011 args = task->tk_msg.rpc_argp;
5012 res = task->tk_msg.rpc_resp;
5013
5014 if (nfs4_setup_sequence(clp, args, res, 0, task))
5015 return;
5016 rpc_call_start(task);
5017}
5018
5019static const struct rpc_call_ops nfs41_sequence_ops = {
5020 .rpc_call_done = nfs41_sequence_call_done,
5021 .rpc_call_prepare = nfs41_sequence_prepare,
5022};
5023
5024static int nfs41_proc_async_sequence(struct nfs_client *clp,
5025 struct rpc_cred *cred)
5026{
5027 struct nfs4_sequence_args *args;
5028 struct nfs4_sequence_res *res;
5029 struct rpc_message msg = {
5030 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5031 .rpc_cred = cred,
5032 };
5033
5034 args = kzalloc(sizeof(*args), GFP_KERNEL);
5035 if (!args)
5036 return -ENOMEM;
5037 res = kzalloc(sizeof(*res), GFP_KERNEL);
5038 if (!res) {
5039 kfree(args);
5040 return -ENOMEM;
5041 }
5042 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
5043 msg.rpc_argp = args;
5044 msg.rpc_resp = res;
5045
5046 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
5047 &nfs41_sequence_ops, (void *)clp);
5048}
5049
fce5c838
RL		 5050struct nfs4_reclaim_complete_data {
5051 struct nfs_client *clp;
5052 struct nfs41_reclaim_complete_args arg;
5053 struct nfs41_reclaim_complete_res res;
5054};
5055
5056static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5057{
5058 struct nfs4_reclaim_complete_data *calldata = data;
5059
b257957e 5060 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
fce5c838
RL		 5061 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
5062 &calldata->res.seq_res, 0, task))
5063 return;
5064
5065 rpc_call_start(task);
5066}
5067
5068static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5069{
5070 struct nfs4_reclaim_complete_data *calldata = data;
5071 struct nfs_client *clp = calldata->clp;
5072 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5073
5074 dprintk("--> %s\n", __func__);
5075 nfs41_sequence_done(clp, res, task->tk_status);
5076 switch (task->tk_status) {
5077 case 0:
5078 case -NFS4ERR_COMPLETE_ALREADY:
5079 break;
5080 case -NFS4ERR_BADSESSION:
5081 case -NFS4ERR_DEADSESSION:
5082 /*
5083 * Handle the session error, but do not retry the operation, as
5084 * we have no way of telling whether the clientid had to be
5085 * reset before we got our reply. If reset, a new wave of
5086 * reclaim operations will follow, containing their own reclaim
5087 * complete. We don't want our retry to get on the way of
5088 * recovery by incorrectly indicating to the server that we're
5089 * done reclaiming state since the process had to be restarted.
5090 */
5091 _nfs4_async_handle_error(task, NULL, clp, NULL);
5092 break;
5093 default:
5094 if (_nfs4_async_handle_error(
5095 task, NULL, clp, NULL) == -EAGAIN) {
5096 rpc_restart_call_prepare(task);
5097 return;
5098 }
5099 }
fce5c838
RL		 5100
5101 dprintk("<-- %s\n", __func__);
5102}
5103
5104static void nfs4_free_reclaim_complete_data(void *data)
5105{
5106 struct nfs4_reclaim_complete_data *calldata = data;
5107
5108 kfree(calldata);
5109}
5110
5111static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5112 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5113 .rpc_call_done = nfs4_reclaim_complete_done,
5114 .rpc_release = nfs4_free_reclaim_complete_data,
5115};
5116
5117/*
5118 * Issue a global reclaim complete.
5119 */
5120static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5121{
5122 struct nfs4_reclaim_complete_data *calldata;
5123 struct rpc_task *task;
5124 struct rpc_message msg = {
5125 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5126 };
5127 struct rpc_task_setup task_setup_data = {
5128 .rpc_client = clp->cl_rpcclient,
5129 .rpc_message = &msg,
5130 .callback_ops = &nfs4_reclaim_complete_call_ops,
5131 .flags = RPC_TASK_ASYNC,
5132 };
5133 int status = -ENOMEM;
5134
5135 dprintk("--> %s\n", __func__);
5136 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5137 if (calldata == NULL)
5138 goto out;
5139 calldata->clp = clp;
5140 calldata->arg.one_fs = 0;
5141 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5142
5143 msg.rpc_argp = &calldata->arg;
5144 msg.rpc_resp = &calldata->res;
5145 task_setup_data.callback_data = calldata;
5146 task = rpc_run_task(&task_setup_data);
5147 if (IS_ERR(task))
5148 status = PTR_ERR(task);
5149 rpc_put_task(task);
5150out:
5151 dprintk("<-- %s status=%d\n", __func__, status);
5152 return status;
5153}
557134a3
AA		 5154#endif /* CONFIG_NFS_V4_1 */
5155
591d71cb 5156struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5157 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5158 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5159 .recover_open = nfs4_open_reclaim,
5160 .recover_lock = nfs4_lock_reclaim,
591d71cb 5161 .establish_clid = nfs4_init_clientid,
90a16617 5162 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5163};
5164
591d71cb
AA		 5165#if defined(CONFIG_NFS_V4_1)
5166struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5167 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5168 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5169 .recover_open = nfs4_open_reclaim,
5170 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5171 .establish_clid = nfs41_init_clientid,
b4b82607 5172 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5173 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5174};
5175#endif /* CONFIG_NFS_V4_1 */
5176
5177struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5178 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5179 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5180 .recover_open = nfs4_open_expired,
5181 .recover_lock = nfs4_lock_expired,
5182 .establish_clid = nfs4_init_clientid,
90a16617 5183 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5184};
5185
5186#if defined(CONFIG_NFS_V4_1)
5187struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5188 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5189 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5190 .recover_open = nfs4_open_expired,
5191 .recover_lock = nfs4_lock_expired,
4d643d1d 5192 .establish_clid = nfs41_init_clientid,
b4b82607 5193 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5194};
591d71cb 5195#endif /* CONFIG_NFS_V4_1 */
1da177e4 5196
29fba38b
BH		 5197struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5198 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5199 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5200 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5201};
5202
5203#if defined(CONFIG_NFS_V4_1)
5204struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5205 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5206 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5207 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5208};
5209#endif
5210
5211/*
5212 * Per minor version reboot and network partition recovery ops
5213 */
5214
591d71cb
AA		 5215struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5216 &nfs40_reboot_recovery_ops,
5217#if defined(CONFIG_NFS_V4_1)
5218 &nfs41_reboot_recovery_ops,
5219#endif
5220};
5221
5222struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5223 &nfs40_nograce_recovery_ops,
5224#if defined(CONFIG_NFS_V4_1)
5225 &nfs41_nograce_recovery_ops,
5226#endif
5227};
5228
29fba38b
BH		 5229struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5230 &nfs40_state_renewal_ops,
5231#if defined(CONFIG_NFS_V4_1)
5232 &nfs41_state_renewal_ops,
5233#endif
5234};
5235
92e1d5be 5236static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5237 .permission = nfs_permission,
5238 .getattr = nfs_getattr,
5239 .setattr = nfs_setattr,
5240 .getxattr = nfs4_getxattr,
5241 .setxattr = nfs4_setxattr,
5242 .listxattr = nfs4_listxattr,
5243};
5244
509de811 5245const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5246 .version = 4, /* protocol version */
5247 .dentry_ops = &nfs4_dentry_operations,
5248 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5249 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5250 .getroot = nfs4_proc_get_root,
5251 .getattr = nfs4_proc_getattr,
5252 .setattr = nfs4_proc_setattr,
2b3de441 5253 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5254 .lookup = nfs4_proc_lookup,
5255 .access = nfs4_proc_access,
5256 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5257 .create = nfs4_proc_create,
5258 .remove = nfs4_proc_remove,
5259 .unlink_setup = nfs4_proc_unlink_setup,
5260 .unlink_done = nfs4_proc_unlink_done,
5261 .rename = nfs4_proc_rename,
5262 .link = nfs4_proc_link,
5263 .symlink = nfs4_proc_symlink,
5264 .mkdir = nfs4_proc_mkdir,
5265 .rmdir = nfs4_proc_remove,
5266 .readdir = nfs4_proc_readdir,
5267 .mknod = nfs4_proc_mknod,
5268 .statfs = nfs4_proc_statfs,
5269 .fsinfo = nfs4_proc_fsinfo,
5270 .pathconf = nfs4_proc_pathconf,
e9326dca 5271 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5272 .decode_dirent = nfs4_decode_dirent,
5273 .read_setup = nfs4_proc_read_setup,
ec06c096 5274 .read_done = nfs4_read_done,
1da177e4 5275 .write_setup = nfs4_proc_write_setup,
788e7a89 5276 .write_done = nfs4_write_done,
1da177e4 5277 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5278 .commit_done = nfs4_commit_done,
1da177e4 5279 .lock = nfs4_proc_lock,
e50a1c2e 5280 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5281 .close_context = nfs4_close_context,
1da177e4
LT		 5282};
5283
5284/*
5285 * Local variables:
5286 * c-basic-offset: 8
5287 * End:
5288 */
Linux 6.x block layer and io_uring tree(s)