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nfs41: fix session fore channel negotiation
[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:
9e33bed5 1838 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
0110ee15 1839 nfs_restart_rpc(task, server->nfs_client);
1da177e4
LT		 1840 return;
1841 }
1842 }
516a6af6 1843 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1844}
1845
4ce70ada 1846static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1847{
4ce70ada 1848 struct nfs4_closedata *calldata = data;
9512135d 1849 struct nfs4_state *state = calldata->state;
88069f77 1850 int call_close = 0;
9512135d 1851
963d8fe5 1852 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1853 return;
003707c7 1854
88069f77
TM		 1855 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1856 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1857 spin_lock(&state->owner->so_lock);
003707c7 1858 /* Calculate the change in open mode */
e7616923 1859 if (state->n_rdwr == 0) {
003707c7 1860 if (state->n_rdonly == 0) {
88069f77
TM		 1861 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1862 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1863 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1864 }
1865 if (state->n_wronly == 0) {
88069f77
TM		 1866 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1867 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1868 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1869 }
e7616923 1870 }
4cecb76f 1871 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1872
1873 if (!call_close) {
963d8fe5
TM		 1874 /* Note: exit _without_ calling nfs4_close_done */
1875 task->tk_action = NULL;
9512135d
TM		 1876 return;
1877 }
88069f77
TM		 1878
1879 if (calldata->arg.fmode == 0)
1880 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1881
516a6af6 1882 nfs_fattr_init(calldata->res.fattr);
26e976a8 1883 calldata->timestamp = jiffies;
19ddab06
AA		 1884 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1885 &calldata->arg.seq_args, &calldata->res.seq_res,
1886 1, task))
1887 return;
5138fde0 1888 rpc_call_start(task);
1da177e4
LT		 1889}
1890
963d8fe5 1891static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1892 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1893 .rpc_call_done = nfs4_close_done,
1894 .rpc_release = nfs4_free_closedata,
1895};
1896
1da177e4
LT		 1897/*
1898 * It is possible for data to be read/written from a mem-mapped file
1899 * after the sys_close call (which hits the vfs layer as a flush).
1900 * This means that we can't safely call nfsv4 close on a file until
1901 * the inode is cleared. This in turn means that we are not good
1902 * NFSv4 citizens - we do not indicate to the server to update the file's
1903 * share state even when we are done with one of the three share
1904 * stateid's in the inode.
1905 *
1906 * NOTE: Caller must be holding the sp->so_owner semaphore!
1907 */
a49c3c77 1908int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1909{
4a35bd41 1910 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1911 struct nfs4_closedata *calldata;
b39e625b
TM		 1912 struct nfs4_state_owner *sp = state->owner;
1913 struct rpc_task *task;
5138fde0
TM		 1914 struct rpc_message msg = {
1915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1916 .rpc_cred = state->owner->so_cred,
1917 };
c970aa85
TM		 1918 struct rpc_task_setup task_setup_data = {
1919 .rpc_client = server->client,
5138fde0 1920 .rpc_message = &msg,
c970aa85 1921 .callback_ops = &nfs4_close_ops,
101070ca 1922 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1923 .flags = RPC_TASK_ASYNC,
1924 };
9512135d 1925 int status = -ENOMEM;
1da177e4 1926
19ddab06 1927 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1928 if (calldata == NULL)
9512135d 1929 goto out;
4a35bd41 1930 calldata->inode = state->inode;
1da177e4 1931 calldata->state = state;
4a35bd41 1932 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1933 calldata->arg.stateid = &state->open_stateid;
1da177e4 1934 /* Serialization for the sequence id */
cee54fc9 1935 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1936 if (calldata->arg.seqid == NULL)
1937 goto out_free_calldata;
dc0b027d 1938 calldata->arg.fmode = 0;
a65318bf 1939 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1940 calldata->res.fattr = &calldata->fattr;
c1d51931 1941 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1942 calldata->res.server = server;
5f7dbd5c 1943 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1944 calldata->path.mnt = mntget(path->mnt);
1945 calldata->path.dentry = dget(path->dentry);
9512135d 1946
5138fde0
TM		 1947 msg.rpc_argp = &calldata->arg,
1948 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1949 task_setup_data.callback_data = calldata;
1950 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1951 if (IS_ERR(task))
1952 return PTR_ERR(task);
a49c3c77
TM		 1953 status = 0;
1954 if (wait)
1955 status = rpc_wait_for_completion_task(task);
b39e625b 1956 rpc_put_task(task);
a49c3c77 1957 return status;
9512135d
TM		 1958out_free_calldata:
1959 kfree(calldata);
1960out:
b39e625b
TM		 1961 nfs4_put_open_state(state);
1962 nfs4_put_state_owner(sp);
9512135d 1963 return status;
1da177e4
LT		 1964}
1965
dc0b027d 1966static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1967{
1968 struct file *filp;
1b45c46c 1969 int ret;
02a913a7 1970
1b45c46c 1971 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1972 if (fmode & FMODE_EXEC) {
af22f94a 1973 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1974 state->owner->so_cred,
1975 nd->intent.open.flags);
1976 if (ret < 0)
1977 goto out_close;
1978 }
4a35bd41 1979 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1980 if (!IS_ERR(filp)) {
1981 struct nfs_open_context *ctx;
cd3758e3 1982 ctx = nfs_file_open_context(filp);
02a913a7 1983 ctx->state = state;
95cf959b
TM		 1984 return 0;
1985 }
1b45c46c
TM		 1986 ret = PTR_ERR(filp);
1987out_close:
dc0b027d 1988 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1989 return ret;
02a913a7
TM		 1990}
1991
1992struct dentry *
1da177e4
LT		 1993nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1994{
ad389da7 1995 struct path path = {
4ac91378 1996 .mnt = nd->path.mnt,
ad389da7
TM		 1997 .dentry = dentry,
1998 };
4ac91378 1999 struct dentry *parent;
1da177e4
LT		 2000 struct iattr attr;
2001 struct rpc_cred *cred;
2002 struct nfs4_state *state;
02a913a7 2003 struct dentry *res;
dc0b027d 2004 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2005
2006 if (nd->flags & LOOKUP_CREATE) {
2007 attr.ia_mode = nd->intent.open.create_mode;
2008 attr.ia_valid = ATTR_MODE;
2009 if (!IS_POSIXACL(dir))
ce3b0f8d 2010 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2011 } else {
2012 attr.ia_valid = 0;
2013 BUG_ON(nd->intent.open.flags & O_CREAT);
2014 }
2015
98a8e323 2016 cred = rpc_lookup_cred();
1da177e4 2017 if (IS_ERR(cred))
02a913a7 2018 return (struct dentry *)cred;
565277f6
TM		 2019 parent = dentry->d_parent;
2020 /* Protect against concurrent sillydeletes */
2021 nfs_block_sillyrename(parent);
dc0b027d 2022 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2023 put_rpccred(cred);
02a913a7 2024 if (IS_ERR(state)) {
d75340cc 2025 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2026 d_add(dentry, NULL);
d75340cc
TM		 2027 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2028 }
565277f6 2029 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2030 return (struct dentry *)state;
2031 }
24ac23ab 2032 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2033 if (res != NULL)
deee9369 2034 path.dentry = res;
d75340cc 2035 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2036 nfs_unblock_sillyrename(parent);
dc0b027d 2037 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2038 return res;
1da177e4
LT		 2039}
2040
2041int
02a913a7 2042nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2043{
ad389da7 2044 struct path path = {
4ac91378 2045 .mnt = nd->path.mnt,
ad389da7
TM		 2046 .dentry = dentry,
2047 };
1da177e4
LT		 2048 struct rpc_cred *cred;
2049 struct nfs4_state *state;
dc0b027d 2050 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2051
98a8e323 2052 cred = rpc_lookup_cred();
1da177e4
LT		 2053 if (IS_ERR(cred))
2054 return PTR_ERR(cred);
dc0b027d 2055 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2056 put_rpccred(cred);
02a913a7
TM		 2057 if (IS_ERR(state)) {
2058 switch (PTR_ERR(state)) {
2059 case -EPERM:
2060 case -EACCES:
2061 case -EDQUOT:
2062 case -ENOSPC:
2063 case -EROFS:
2064 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
2065 return 1;
b87c0adf
CL		 2066 default:
2067 goto out_drop;
02a913a7 2068 }
02a913a7 2069 }
24ac23ab 2070 if (state->inode == dentry->d_inode) {
d75340cc 2071 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2072 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2073 return 1;
2074 }
dc0b027d 2075 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2076out_drop:
2077 d_drop(dentry);
1da177e4
LT		 2078 return 0;
2079}
2080
1185a552 2081static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2082{
2083 if (ctx->state == NULL)
2084 return;
2085 if (is_sync)
2086 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2087 else
2088 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2089}
1da177e4
LT		 2090
2091static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2092{
43652ad5
BH		 2093 struct nfs4_server_caps_arg args = {
2094 .fhandle = fhandle,
2095 };
1da177e4
LT		 2096 struct nfs4_server_caps_res res = {};
2097 struct rpc_message msg = {
2098 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2099 .rpc_argp = &args,
1da177e4
LT		 2100 .rpc_resp = &res,
2101 };
2102 int status;
2103
cccef3b9 2104 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2105 if (status == 0) {
2106 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2107 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2108 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2109 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2110 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2111 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2112 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2113 server->caps |= NFS_CAP_ACLS;
2114 if (res.has_links != 0)
2115 server->caps |= NFS_CAP_HARDLINKS;
2116 if (res.has_symlinks != 0)
2117 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2118 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2119 server->caps |= NFS_CAP_FILEID;
2120 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2121 server->caps |= NFS_CAP_MODE;
2122 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2123 server->caps |= NFS_CAP_NLINK;
2124 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2125 server->caps |= NFS_CAP_OWNER;
2126 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2127 server->caps |= NFS_CAP_OWNER_GROUP;
2128 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2129 server->caps |= NFS_CAP_ATIME;
2130 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2131 server->caps |= NFS_CAP_CTIME;
2132 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2133 server->caps |= NFS_CAP_MTIME;
2134
a65318bf
TM		 2135 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2136 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2137 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2138 server->acl_bitmask = res.acl_bitmask;
2139 }
cccef3b9 2140
1da177e4
LT		 2141 return status;
2142}
2143
55a97593 2144int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2145{
2146 struct nfs4_exception exception = { };
2147 int err;
2148 do {
2149 err = nfs4_handle_exception(server,
2150 _nfs4_server_capabilities(server, fhandle),
2151 &exception);
2152 } while (exception.retry);
2153 return err;
2154}
2155
2156static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2157 struct nfs_fsinfo *info)
2158{
1da177e4
LT		 2159 struct nfs4_lookup_root_arg args = {
2160 .bitmask = nfs4_fattr_bitmap,
2161 };
2162 struct nfs4_lookup_res res = {
2163 .server = server,
0e574af1 2164 .fattr = info->fattr,
1da177e4
LT		 2165 .fh = fhandle,
2166 };
2167 struct rpc_message msg = {
2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2169 .rpc_argp = &args,
2170 .rpc_resp = &res,
2171 };
008f55d0 2172
0e574af1 2173 nfs_fattr_init(info->fattr);
fccba804 2174 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2175}
2176
2177static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2178 struct nfs_fsinfo *info)
2179{
2180 struct nfs4_exception exception = { };
2181 int err;
2182 do {
2183 err = nfs4_handle_exception(server,
2184 _nfs4_lookup_root(server, fhandle, info),
2185 &exception);
2186 } while (exception.retry);
2187 return err;
2188}
2189
54ceac45
DH		 2190/*
2191 * get the file handle for the "/" directory on the server
2192 */
1da177e4 2193static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2194 struct nfs_fsinfo *info)
1da177e4 2195{
1da177e4
LT		 2196 int status;
2197
1da177e4 2198 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2199 if (status == 0)
2200 status = nfs4_server_capabilities(server, fhandle);
2201 if (status == 0)
2202 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2203 return nfs4_map_errors(status);
1da177e4
LT		 2204}
2205
6b97fd3d
MN		 2206/*
2207 * Get locations and (maybe) other attributes of a referral.
2208 * Note that we'll actually follow the referral later when
2209 * we detect fsid mismatch in inode revalidation
2210 */
56659e99 2211static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2212{
2213 int status = -ENOMEM;
2214 struct page *page = NULL;
2215 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2216
2217 page = alloc_page(GFP_KERNEL);
2218 if (page == NULL)
2219 goto out;
2220 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2221 if (locations == NULL)
2222 goto out;
2223
c228fd3a 2224 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2225 if (status != 0)
2226 goto out;
2227 /* Make sure server returned a different fsid for the referral */
2228 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2229 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2230 status = -EIO;
2231 goto out;
2232 }
2233
2234 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2235 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2236 if (!fattr->mode)
2237 fattr->mode = S_IFDIR;
2238 memset(fhandle, 0, sizeof(struct nfs_fh));
2239out:
2240 if (page)
2241 __free_page(page);
2242 if (locations)
2243 kfree(locations);
2244 return status;
2245}
2246
1da177e4
LT		 2247static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2248{
2249 struct nfs4_getattr_arg args = {
2250 .fh = fhandle,
2251 .bitmask = server->attr_bitmask,
2252 };
2253 struct nfs4_getattr_res res = {
2254 .fattr = fattr,
2255 .server = server,
2256 };
2257 struct rpc_message msg = {
2258 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2259 .rpc_argp = &args,
2260 .rpc_resp = &res,
2261 };
2262
0e574af1 2263 nfs_fattr_init(fattr);
cccef3b9 2264 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2265}
2266
2267static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2268{
2269 struct nfs4_exception exception = { };
2270 int err;
2271 do {
2272 err = nfs4_handle_exception(server,
2273 _nfs4_proc_getattr(server, fhandle, fattr),
2274 &exception);
2275 } while (exception.retry);
2276 return err;
2277}
2278
2279/*
2280 * The file is not closed if it is opened due to the a request to change
2281 * the size of the file. The open call will not be needed once the
2282 * VFS layer lookup-intents are implemented.
2283 *
2284 * Close is called when the inode is destroyed.
2285 * If we haven't opened the file for O_WRONLY, we
2286 * need to in the size_change case to obtain a stateid.
2287 *
2288 * Got race?
2289 * Because OPEN is always done by name in nfsv4, it is
2290 * possible that we opened a different file by the same
2291 * name. We can recognize this race condition, but we
2292 * can't do anything about it besides returning an error.
2293 *
2294 * This will be fixed with VFS changes (lookup-intent).
2295 */
2296static int
2297nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2298 struct iattr *sattr)
2299{
08e9eac4 2300 struct inode *inode = dentry->d_inode;
659bfcd6 2301 struct rpc_cred *cred = NULL;
d530838b 2302 struct nfs4_state *state = NULL;
1da177e4
LT		 2303 int status;
2304
0e574af1 2305 nfs_fattr_init(fattr);
1da177e4 2306
d530838b 2307 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2308 if (sattr->ia_valid & ATTR_FILE) {
2309 struct nfs_open_context *ctx;
2310
2311 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2312 if (ctx) {
2313 cred = ctx->cred;
2314 state = ctx->state;
2315 }
659bfcd6 2316 }
08e9eac4 2317
659bfcd6 2318 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2319 if (status == 0)
2320 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2321 return status;
2322}
2323
56659e99
TM		 2324static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2325 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2326 struct nfs_fattr *fattr)
2327{
2328 int status;
2329 struct nfs4_lookup_arg args = {
2330 .bitmask = server->attr_bitmask,
2331 .dir_fh = dirfh,
2332 .name = name,
2333 };
2334 struct nfs4_lookup_res res = {
2335 .server = server,
2336 .fattr = fattr,
2337 .fh = fhandle,
2338 };
2339 struct rpc_message msg = {
2340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2341 .rpc_argp = &args,
2342 .rpc_resp = &res,
2343 };
2344
2345 nfs_fattr_init(fattr);
2346
2347 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2348 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2349 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2350 return status;
2351}
2352
2353static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2354 struct qstr *name, struct nfs_fh *fhandle,
2355 struct nfs_fattr *fattr)
2356{
2357 struct nfs4_exception exception = { };
2358 int err;
2359 do {
4e56e082
TM		 2360 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2361 /* FIXME: !!!! */
2362 if (err == -NFS4ERR_MOVED) {
2363 err = -EREMOTE;
2364 break;
2365 }
2366 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2367 } while (exception.retry);
2368 return err;
2369}
2370
56659e99 2371static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2372 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2373{
4e56e082 2374 int status;
1da177e4
LT		 2375
2376 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2377 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2378 if (status == -NFS4ERR_MOVED)
2379 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2380 dprintk("NFS reply lookup: %d\n", status);
2381 return status;
2382}
2383
2384static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2385{
2386 struct nfs4_exception exception = { };
2387 int err;
2388 do {
2389 err = nfs4_handle_exception(NFS_SERVER(dir),
2390 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2391 &exception);
2392 } while (exception.retry);
2393 return err;
2394}
2395
2396static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2397{
76b32999
TM		 2398 struct nfs_server *server = NFS_SERVER(inode);
2399 struct nfs_fattr fattr;
1da177e4
LT		 2400 struct nfs4_accessargs args = {
2401 .fh = NFS_FH(inode),
76b32999
TM		 2402 .bitmask = server->attr_bitmask,
2403 };
2404 struct nfs4_accessres res = {
2405 .server = server,
2406 .fattr = &fattr,
1da177e4 2407 };
1da177e4
LT		 2408 struct rpc_message msg = {
2409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2410 .rpc_argp = &args,
2411 .rpc_resp = &res,
2412 .rpc_cred = entry->cred,
2413 };
2414 int mode = entry->mask;
2415 int status;
2416
2417 /*
2418 * Determine which access bits we want to ask for...
2419 */
2420 if (mode & MAY_READ)
2421 args.access |= NFS4_ACCESS_READ;
2422 if (S_ISDIR(inode->i_mode)) {
2423 if (mode & MAY_WRITE)
2424 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2425 if (mode & MAY_EXEC)
2426 args.access |= NFS4_ACCESS_LOOKUP;
2427 } else {
2428 if (mode & MAY_WRITE)
2429 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2430 if (mode & MAY_EXEC)
2431 args.access |= NFS4_ACCESS_EXECUTE;
2432 }
76b32999 2433 nfs_fattr_init(&fattr);
cccef3b9 2434 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2435 if (!status) {
2436 entry->mask = 0;
2437 if (res.access & NFS4_ACCESS_READ)
2438 entry->mask |= MAY_READ;
2439 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2440 entry->mask |= MAY_WRITE;
2441 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2442 entry->mask |= MAY_EXEC;
76b32999 2443 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2444 }
2445 return status;
2446}
2447
2448static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2449{
2450 struct nfs4_exception exception = { };
2451 int err;
2452 do {
2453 err = nfs4_handle_exception(NFS_SERVER(inode),
2454 _nfs4_proc_access(inode, entry),
2455 &exception);
2456 } while (exception.retry);
2457 return err;
2458}
2459
2460/*
2461 * TODO: For the time being, we don't try to get any attributes
2462 * along with any of the zero-copy operations READ, READDIR,
2463 * READLINK, WRITE.
2464 *
2465 * In the case of the first three, we want to put the GETATTR
2466 * after the read-type operation -- this is because it is hard
2467 * to predict the length of a GETATTR response in v4, and thus
2468 * align the READ data correctly. This means that the GETATTR
2469 * may end up partially falling into the page cache, and we should
2470 * shift it into the 'tail' of the xdr_buf before processing.
2471 * To do this efficiently, we need to know the total length
2472 * of data received, which doesn't seem to be available outside
2473 * of the RPC layer.
2474 *
2475 * In the case of WRITE, we also want to put the GETATTR after
2476 * the operation -- in this case because we want to make sure
2477 * we get the post-operation mtime and size. This means that
2478 * we can't use xdr_encode_pages() as written: we need a variant
2479 * of it which would leave room in the 'tail' iovec.
2480 *
2481 * Both of these changes to the XDR layer would in fact be quite
2482 * minor, but I decided to leave them for a subsequent patch.
2483 */
2484static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2485 unsigned int pgbase, unsigned int pglen)
2486{
2487 struct nfs4_readlink args = {
2488 .fh = NFS_FH(inode),
2489 .pgbase = pgbase,
2490 .pglen = pglen,
2491 .pages = &page,
2492 };
f50c7000 2493 struct nfs4_readlink_res res;
1da177e4
LT		 2494 struct rpc_message msg = {
2495 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2496 .rpc_argp = &args,
f50c7000 2497 .rpc_resp = &res,
1da177e4
LT		 2498 };
2499
cccef3b9 2500 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2501}
2502
2503static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2504 unsigned int pgbase, unsigned int pglen)
2505{
2506 struct nfs4_exception exception = { };
2507 int err;
2508 do {
2509 err = nfs4_handle_exception(NFS_SERVER(inode),
2510 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2511 &exception);
2512 } while (exception.retry);
2513 return err;
2514}
2515
1da177e4
LT		 2516/*
2517 * Got race?
2518 * We will need to arrange for the VFS layer to provide an atomic open.
2519 * Until then, this create/open method is prone to inefficiency and race
2520 * conditions due to the lookup, create, and open VFS calls from sys_open()
2521 * placed on the wire.
2522 *
2523 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2524 * The file will be opened again in the subsequent VFS open call
2525 * (nfs4_proc_file_open).
2526 *
2527 * The open for read will just hang around to be used by any process that
2528 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2529 */
2530
2531static int
2532nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2533 int flags, struct nameidata *nd)
1da177e4 2534{
ad389da7 2535 struct path path = {
4ac91378 2536 .mnt = nd->path.mnt,
ad389da7
TM		 2537 .dentry = dentry,
2538 };
1da177e4
LT		 2539 struct nfs4_state *state;
2540 struct rpc_cred *cred;
dc0b027d 2541 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2542 int status = 0;
2543
98a8e323 2544 cred = rpc_lookup_cred();
1da177e4
LT		 2545 if (IS_ERR(cred)) {
2546 status = PTR_ERR(cred);
2547 goto out;
2548 }
dc0b027d 2549 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2550 d_drop(dentry);
1da177e4
LT		 2551 if (IS_ERR(state)) {
2552 status = PTR_ERR(state);
659bfcd6 2553 goto out_putcred;
1da177e4 2554 }
d4d9cdcb 2555 d_add(dentry, igrab(state->inode));
d75340cc 2556 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2557 if (flags & O_EXCL) {
2558 struct nfs_fattr fattr;
659bfcd6 2559 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2560 if (status == 0)
65e4308d 2561 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2562 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2563 }
ad389da7 2564 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2565 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2566 else
dc0b027d 2567 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2568out_putcred:
2569 put_rpccred(cred);
1da177e4
LT		 2570out:
2571 return status;
2572}
2573
2574static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2575{
16e42959 2576 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2577 struct nfs_removeargs args = {
1da177e4 2578 .fh = NFS_FH(dir),
4fdc17b2
TM		 2579 .name.len = name->len,
2580 .name.name = name->name,
16e42959
TM		 2581 .bitmask = server->attr_bitmask,
2582 };
4fdc17b2 2583 struct nfs_removeres res = {
16e42959 2584 .server = server,
1da177e4 2585 };
1da177e4 2586 struct rpc_message msg = {
4fdc17b2
TM		 2587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2588 .rpc_argp = &args,
2589 .rpc_resp = &res,
1da177e4
LT		 2590 };
2591 int status;
2592
4fdc17b2 2593 nfs_fattr_init(&res.dir_attr);
cccef3b9 2594 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2595 if (status == 0) {
2596 update_changeattr(dir, &res.cinfo);
4fdc17b2 2597 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2598 }
1da177e4
LT		 2599 return status;
2600}
2601
2602static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2603{
2604 struct nfs4_exception exception = { };
2605 int err;
2606 do {
2607 err = nfs4_handle_exception(NFS_SERVER(dir),
2608 _nfs4_proc_remove(dir, name),
2609 &exception);
2610 } while (exception.retry);
2611 return err;
2612}
2613
e4eff1a6 2614static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2615{
e4eff1a6
TM		 2616 struct nfs_server *server = NFS_SERVER(dir);
2617 struct nfs_removeargs *args = msg->rpc_argp;
2618 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2619
a65318bf 2620 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2621 res->server = server;
1da177e4 2622 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2623}
2624
e4eff1a6 2625static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2626{
e4eff1a6
TM		 2627 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2628
472cfbd9 2629 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2630 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2631 return 0;
2632 update_changeattr(dir, &res->cinfo);
2633 nfs_post_op_update_inode(dir, &res->dir_attr);
2634 return 1;
1da177e4
LT		 2635}
2636
2637static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2638 struct inode *new_dir, struct qstr *new_name)
2639{
6caf2c82 2640 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2641 struct nfs4_rename_arg arg = {
2642 .old_dir = NFS_FH(old_dir),
2643 .new_dir = NFS_FH(new_dir),
2644 .old_name = old_name,
2645 .new_name = new_name,
6caf2c82
TM		 2646 .bitmask = server->attr_bitmask,
2647 };
2648 struct nfs_fattr old_fattr, new_fattr;
2649 struct nfs4_rename_res res = {
2650 .server = server,
2651 .old_fattr = &old_fattr,
2652 .new_fattr = &new_fattr,
1da177e4 2653 };
1da177e4
LT		 2654 struct rpc_message msg = {
2655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2656 .rpc_argp = &arg,
2657 .rpc_resp = &res,
2658 };
2659 int status;
2660
6caf2c82
TM		 2661 nfs_fattr_init(res.old_fattr);
2662 nfs_fattr_init(res.new_fattr);
cccef3b9 2663 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2664
2665 if (!status) {
2666 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2667 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2668 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2669 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2670 }
2671 return status;
2672}
2673
2674static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2675 struct inode *new_dir, struct qstr *new_name)
2676{
2677 struct nfs4_exception exception = { };
2678 int err;
2679 do {
2680 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2681 _nfs4_proc_rename(old_dir, old_name,
2682 new_dir, new_name),
2683 &exception);
2684 } while (exception.retry);
2685 return err;
2686}
2687
2688static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2689{
91ba2eee 2690 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2691 struct nfs4_link_arg arg = {
2692 .fh = NFS_FH(inode),
2693 .dir_fh = NFS_FH(dir),
2694 .name = name,
91ba2eee
TM		 2695 .bitmask = server->attr_bitmask,
2696 };
2697 struct nfs_fattr fattr, dir_attr;
2698 struct nfs4_link_res res = {
2699 .server = server,
2700 .fattr = &fattr,
2701 .dir_attr = &dir_attr,
1da177e4 2702 };
1da177e4
LT		 2703 struct rpc_message msg = {
2704 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2705 .rpc_argp = &arg,
91ba2eee 2706 .rpc_resp = &res,
1da177e4
LT		 2707 };
2708 int status;
2709
91ba2eee
TM		 2710 nfs_fattr_init(res.fattr);
2711 nfs_fattr_init(res.dir_attr);
cccef3b9 2712 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2713 if (!status) {
2714 update_changeattr(dir, &res.cinfo);
2715 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2716 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2717 }
1da177e4
LT		 2718
2719 return status;
2720}
2721
2722static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2723{
2724 struct nfs4_exception exception = { };
2725 int err;
2726 do {
2727 err = nfs4_handle_exception(NFS_SERVER(inode),
2728 _nfs4_proc_link(inode, dir, name),
2729 &exception);
2730 } while (exception.retry);
2731 return err;
2732}
2733
57dc9a57
TM		 2734struct nfs4_createdata {
2735 struct rpc_message msg;
2736 struct nfs4_create_arg arg;
2737 struct nfs4_create_res res;
2738 struct nfs_fh fh;
2739 struct nfs_fattr fattr;
2740 struct nfs_fattr dir_fattr;
2741};
2742
2743static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2744 struct qstr *name, struct iattr *sattr, u32 ftype)
2745{
2746 struct nfs4_createdata *data;
2747
2748 data = kzalloc(sizeof(*data), GFP_KERNEL);
2749 if (data != NULL) {
2750 struct nfs_server *server = NFS_SERVER(dir);
2751
2752 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2753 data->msg.rpc_argp = &data->arg;
2754 data->msg.rpc_resp = &data->res;
2755 data->arg.dir_fh = NFS_FH(dir);
2756 data->arg.server = server;
2757 data->arg.name = name;
2758 data->arg.attrs = sattr;
2759 data->arg.ftype = ftype;
2760 data->arg.bitmask = server->attr_bitmask;
2761 data->res.server = server;
2762 data->res.fh = &data->fh;
2763 data->res.fattr = &data->fattr;
2764 data->res.dir_fattr = &data->dir_fattr;
2765 nfs_fattr_init(data->res.fattr);
2766 nfs_fattr_init(data->res.dir_fattr);
2767 }
2768 return data;
2769}
2770
2771static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2772{
cccef3b9
AA		 2773 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2774 &data->arg, &data->res, 1);
57dc9a57
TM		 2775 if (status == 0) {
2776 update_changeattr(dir, &data->res.dir_cinfo);
2777 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2778 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2779 }
2780 return status;
2781}
2782
2783static void nfs4_free_createdata(struct nfs4_createdata *data)
2784{
2785 kfree(data);
2786}
2787
4f390c15 2788static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2789 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2790{
57dc9a57
TM		 2791 struct nfs4_createdata *data;
2792 int status = -ENAMETOOLONG;
1da177e4 2793
94a6d753 2794 if (len > NFS4_MAXPATHLEN)
57dc9a57 2795 goto out;
4f390c15 2796
57dc9a57
TM		 2797 status = -ENOMEM;
2798 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2799 if (data == NULL)
2800 goto out;
2801
2802 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2803 data->arg.u.symlink.pages = &page;
2804 data->arg.u.symlink.len = len;
1da177e4 2805
57dc9a57
TM		 2806 status = nfs4_do_create(dir, dentry, data);
2807
2808 nfs4_free_createdata(data);
2809out:
1da177e4
LT		 2810 return status;
2811}
2812
4f390c15 2813static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2814 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2815{
2816 struct nfs4_exception exception = { };
2817 int err;
2818 do {
2819 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2820 _nfs4_proc_symlink(dir, dentry, page,
2821 len, sattr),
1da177e4
LT		 2822 &exception);
2823 } while (exception.retry);
2824 return err;
2825}
2826
2827static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2828 struct iattr *sattr)
2829{
57dc9a57
TM		 2830 struct nfs4_createdata *data;
2831 int status = -ENOMEM;
1da177e4 2832
57dc9a57
TM		 2833 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2834 if (data == NULL)
2835 goto out;
2836
2837 status = nfs4_do_create(dir, dentry, data);
2838
2839 nfs4_free_createdata(data);
2840out:
1da177e4
LT		 2841 return status;
2842}
2843
2844static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2845 struct iattr *sattr)
2846{
2847 struct nfs4_exception exception = { };
2848 int err;
2849 do {
2850 err = nfs4_handle_exception(NFS_SERVER(dir),
2851 _nfs4_proc_mkdir(dir, dentry, sattr),
2852 &exception);
2853 } while (exception.retry);
2854 return err;
2855}
2856
2857static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2858 u64 cookie, struct page *page, unsigned int count, int plus)
2859{
2860 struct inode *dir = dentry->d_inode;
2861 struct nfs4_readdir_arg args = {
2862 .fh = NFS_FH(dir),
2863 .pages = &page,
2864 .pgbase = 0,
2865 .count = count,
96d25e53 2866 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2867 };
2868 struct nfs4_readdir_res res;
2869 struct rpc_message msg = {
2870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2871 .rpc_argp = &args,
2872 .rpc_resp = &res,
2873 .rpc_cred = cred,
2874 };
2875 int status;
2876
3110ff80 2877 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2878 dentry->d_parent->d_name.name,
2879 dentry->d_name.name,
2880 (unsigned long long)cookie);
1da177e4
LT		 2881 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2882 res.pgbase = args.pgbase;
cccef3b9 2883 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2884 if (status == 0)
2885 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2886
2887 nfs_invalidate_atime(dir);
2888
3110ff80 2889 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2890 return status;
2891}
2892
2893static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2894 u64 cookie, struct page *page, unsigned int count, int plus)
2895{
2896 struct nfs4_exception exception = { };
2897 int err;
2898 do {
2899 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2900 _nfs4_proc_readdir(dentry, cred, cookie,
2901 page, count, plus),
2902 &exception);
2903 } while (exception.retry);
2904 return err;
2905}
2906
2907static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2908 struct iattr *sattr, dev_t rdev)
2909{
57dc9a57
TM		 2910 struct nfs4_createdata *data;
2911 int mode = sattr->ia_mode;
2912 int status = -ENOMEM;
1da177e4
LT		 2913
2914 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2915 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2916
2917 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2918 if (data == NULL)
2919 goto out;
2920
1da177e4 2921 if (S_ISFIFO(mode))
57dc9a57 2922 data->arg.ftype = NF4FIFO;
1da177e4 2923 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2924 data->arg.ftype = NF4BLK;
2925 data->arg.u.device.specdata1 = MAJOR(rdev);
2926 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2927 }
2928 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2929 data->arg.ftype = NF4CHR;
2930 data->arg.u.device.specdata1 = MAJOR(rdev);
2931 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2932 }
1da177e4 2933
57dc9a57
TM		 2934 status = nfs4_do_create(dir, dentry, data);
2935
2936 nfs4_free_createdata(data);
2937out:
1da177e4
LT		 2938 return status;
2939}
2940
2941static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2942 struct iattr *sattr, dev_t rdev)
2943{
2944 struct nfs4_exception exception = { };
2945 int err;
2946 do {
2947 err = nfs4_handle_exception(NFS_SERVER(dir),
2948 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2949 &exception);
2950 } while (exception.retry);
2951 return err;
2952}
2953
2954static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2955 struct nfs_fsstat *fsstat)
2956{
2957 struct nfs4_statfs_arg args = {
2958 .fh = fhandle,
2959 .bitmask = server->attr_bitmask,
2960 };
24ad148a
BH		 2961 struct nfs4_statfs_res res = {
2962 .fsstat = fsstat,
2963 };
1da177e4
LT		 2964 struct rpc_message msg = {
2965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2966 .rpc_argp = &args,
24ad148a 2967 .rpc_resp = &res,
1da177e4
LT		 2968 };
2969
0e574af1 2970 nfs_fattr_init(fsstat->fattr);
cccef3b9 2971 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2972}
2973
2974static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2975{
2976 struct nfs4_exception exception = { };
2977 int err;
2978 do {
2979 err = nfs4_handle_exception(server,
2980 _nfs4_proc_statfs(server, fhandle, fsstat),
2981 &exception);
2982 } while (exception.retry);
2983 return err;
2984}
2985
2986static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2987 struct nfs_fsinfo *fsinfo)
2988{
2989 struct nfs4_fsinfo_arg args = {
2990 .fh = fhandle,
2991 .bitmask = server->attr_bitmask,
2992 };
3dda5e43
BH		 2993 struct nfs4_fsinfo_res res = {
2994 .fsinfo = fsinfo,
2995 };
1da177e4
LT		 2996 struct rpc_message msg = {
2997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2998 .rpc_argp = &args,
3dda5e43 2999 .rpc_resp = &res,
1da177e4
LT		 3000 };
3001
cccef3b9 3002 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3003}
3004
3005static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3006{
3007 struct nfs4_exception exception = { };
3008 int err;
3009
3010 do {
3011 err = nfs4_handle_exception(server,
3012 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3013 &exception);
3014 } while (exception.retry);
3015 return err;
3016}
3017
3018static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3019{
0e574af1 3020 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3021 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3022}
3023
3024static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3025 struct nfs_pathconf *pathconf)
3026{
3027 struct nfs4_pathconf_arg args = {
3028 .fh = fhandle,
3029 .bitmask = server->attr_bitmask,
3030 };
d45b2989
BH		 3031 struct nfs4_pathconf_res res = {
3032 .pathconf = pathconf,
3033 };
1da177e4
LT		 3034 struct rpc_message msg = {
3035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3036 .rpc_argp = &args,
d45b2989 3037 .rpc_resp = &res,
1da177e4
LT		 3038 };
3039
3040 /* None of the pathconf attributes are mandatory to implement */
3041 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3042 memset(pathconf, 0, sizeof(*pathconf));
3043 return 0;
3044 }
3045
0e574af1 3046 nfs_fattr_init(pathconf->fattr);
cccef3b9 3047 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3048}
3049
3050static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3051 struct nfs_pathconf *pathconf)
3052{
3053 struct nfs4_exception exception = { };
3054 int err;
3055
3056 do {
3057 err = nfs4_handle_exception(server,
3058 _nfs4_proc_pathconf(server, fhandle, pathconf),
3059 &exception);
3060 } while (exception.retry);
3061 return err;
3062}
3063
ec06c096 3064static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3065{
ec06c096 3066 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3067
f11c88af
AA		 3068 dprintk("--> %s\n", __func__);
3069
f11c88af
AA		 3070 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3071
9e33bed5 3072 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3073 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3074 return -EAGAIN;
1da177e4 3075 }
8850df99
TM		 3076
3077 nfs_invalidate_atime(data->inode);
1da177e4 3078 if (task->tk_status > 0)
ec06c096
TM		 3079 renew_lease(server, data->timestamp);
3080 return 0;
1da177e4
LT		 3081}
3082
bdc7f021 3083static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3084{
1da177e4 3085 data->timestamp = jiffies;
bdc7f021 3086 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3087}
3088
788e7a89 3089static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3090{
1da177e4
LT		 3091 struct inode *inode = data->inode;
3092
def6ed7e
AA		 3093 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3094 task->tk_status);
3095
9e33bed5 3096 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3097 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3098 return -EAGAIN;
1da177e4 3099 }
4f9838c7 3100 if (task->tk_status >= 0) {
1da177e4 3101 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3102 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3103 }
788e7a89 3104 return 0;
1da177e4
LT		 3105}
3106
bdc7f021 3107static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3108{
bdc7f021
TM		 3109 struct nfs_server *server = NFS_SERVER(data->inode);
3110
a65318bf 3111 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3112 data->res.server = server;
1da177e4
LT		 3113 data->timestamp = jiffies;
3114
bdc7f021 3115 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3116}
3117
788e7a89 3118static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3119{
1da177e4
LT		 3120 struct inode *inode = data->inode;
3121
21d9a851
AA		 3122 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3123 task->tk_status);
9e33bed5 3124 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3125 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3126 return -EAGAIN;
1da177e4 3127 }
9e08a3c5 3128 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3129 return 0;
1da177e4
LT		 3130}
3131
bdc7f021 3132static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3133{
788e7a89 3134 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3135
a65318bf 3136 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3137 data->res.server = server;
bdc7f021 3138 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3139}
3140
3141/*
3142 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3143 * standalone procedure for queueing an asynchronous RENEW.
3144 */
963d8fe5 3145static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3146{
adfa6f98 3147 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3148 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3149
3150 if (task->tk_status < 0) {
95baa25c
TM		 3151 /* Unless we're shutting down, schedule state recovery! */
3152 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3153 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3154 return;
3155 }
3156 spin_lock(&clp->cl_lock);
3157 if (time_before(clp->cl_last_renewal,timestamp))
3158 clp->cl_last_renewal = timestamp;
3159 spin_unlock(&clp->cl_lock);
3160}
3161
963d8fe5
TM		 3162static const struct rpc_call_ops nfs4_renew_ops = {
3163 .rpc_call_done = nfs4_renew_done,
3164};
3165
adfa6f98 3166int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3167{
3168 struct rpc_message msg = {
3169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3170 .rpc_argp = clp,
b4454fe1 3171 .rpc_cred = cred,
1da177e4
LT		 3172 };
3173
3174 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3175 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3176}
3177
adfa6f98 3178int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3179{
3180 struct rpc_message msg = {
3181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3182 .rpc_argp = clp,
b4454fe1 3183 .rpc_cred = cred,
1da177e4
LT		 3184 };
3185 unsigned long now = jiffies;
3186 int status;
3187
3188 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3189 if (status < 0)
3190 return status;
3191 spin_lock(&clp->cl_lock);
3192 if (time_before(clp->cl_last_renewal,now))
3193 clp->cl_last_renewal = now;
3194 spin_unlock(&clp->cl_lock);
3195 return 0;
3196}
3197
aa1870af
BF		 3198static inline int nfs4_server_supports_acls(struct nfs_server *server)
3199{
3200 return (server->caps & NFS_CAP_ACLS)
3201 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3202 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3203}
3204
3205/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3206 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3207 * the stack.
3208 */
3209#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3210
3211static void buf_to_pages(const void *buf, size_t buflen,
3212 struct page **pages, unsigned int *pgbase)
3213{
3214 const void *p = buf;
3215
3216 *pgbase = offset_in_page(buf);
3217 p -= *pgbase;
3218 while (p < buf + buflen) {
3219 *(pages++) = virt_to_page(p);
3220 p += PAGE_CACHE_SIZE;
3221 }
3222}
3223
e50a1c2e
BF		 3224struct nfs4_cached_acl {
3225 int cached;
3226 size_t len;
3e9d4154 3227 char data[0];
e50a1c2e
BF		 3228};
3229
3230static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3231{
3232 struct nfs_inode *nfsi = NFS_I(inode);
3233
3234 spin_lock(&inode->i_lock);
3235 kfree(nfsi->nfs4_acl);
3236 nfsi->nfs4_acl = acl;
3237 spin_unlock(&inode->i_lock);
3238}
3239
3240static void nfs4_zap_acl_attr(struct inode *inode)
3241{
3242 nfs4_set_cached_acl(inode, NULL);
3243}
3244
3245static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3246{
3247 struct nfs_inode *nfsi = NFS_I(inode);
3248 struct nfs4_cached_acl *acl;
3249 int ret = -ENOENT;
3250
3251 spin_lock(&inode->i_lock);
3252 acl = nfsi->nfs4_acl;
3253 if (acl == NULL)
3254 goto out;
3255 if (buf == NULL) /* user is just asking for length */
3256 goto out_len;
3257 if (acl->cached == 0)
3258 goto out;
3259 ret = -ERANGE; /* see getxattr(2) man page */
3260 if (acl->len > buflen)
3261 goto out;
3262 memcpy(buf, acl->data, acl->len);
3263out_len:
3264 ret = acl->len;
3265out:
3266 spin_unlock(&inode->i_lock);
3267 return ret;
3268}
3269
3270static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3271{
3272 struct nfs4_cached_acl *acl;
3273
3274 if (buf && acl_len <= PAGE_SIZE) {
3275 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3276 if (acl == NULL)
3277 goto out;
3278 acl->cached = 1;
3279 memcpy(acl->data, buf, acl_len);
3280 } else {
3281 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3282 if (acl == NULL)
3283 goto out;
3284 acl->cached = 0;
3285 }
3286 acl->len = acl_len;
3287out:
3288 nfs4_set_cached_acl(inode, acl);
3289}
3290
16b4289c 3291static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3292{
aa1870af
BF		 3293 struct page *pages[NFS4ACL_MAXPAGES];
3294 struct nfs_getaclargs args = {
3295 .fh = NFS_FH(inode),
3296 .acl_pages = pages,
3297 .acl_len = buflen,
3298 };
663c79b3
BH		 3299 struct nfs_getaclres res = {
3300 .acl_len = buflen,
3301 };
e50a1c2e 3302 void *resp_buf;
aa1870af
BF		 3303 struct rpc_message msg = {
3304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3305 .rpc_argp = &args,
663c79b3 3306 .rpc_resp = &res,
aa1870af 3307 };
e50a1c2e 3308 struct page *localpage = NULL;
aa1870af
BF		 3309 int ret;
3310
e50a1c2e
BF		 3311 if (buflen < PAGE_SIZE) {
3312 /* As long as we're doing a round trip to the server anyway,
3313 * let's be prepared for a page of acl data. */
3314 localpage = alloc_page(GFP_KERNEL);
3315 resp_buf = page_address(localpage);
3316 if (localpage == NULL)
3317 return -ENOMEM;
3318 args.acl_pages[0] = localpage;
3319 args.acl_pgbase = 0;
663c79b3 3320 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3321 } else {
3322 resp_buf = buf;
3323 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3324 }
cccef3b9 3325 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3326 if (ret)
3327 goto out_free;
663c79b3
BH		 3328 if (res.acl_len > args.acl_len)
3329 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3330 else
663c79b3 3331 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3332 if (buf) {
3333 ret = -ERANGE;
663c79b3 3334 if (res.acl_len > buflen)
e50a1c2e
BF		 3335 goto out_free;
3336 if (localpage)
663c79b3 3337 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3338 }
663c79b3 3339 ret = res.acl_len;
e50a1c2e
BF		 3340out_free:
3341 if (localpage)
3342 __free_page(localpage);
aa1870af
BF		 3343 return ret;
3344}
3345
16b4289c
TM		 3346static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3347{
3348 struct nfs4_exception exception = { };
3349 ssize_t ret;
3350 do {
3351 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3352 if (ret >= 0)
3353 break;
3354 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3355 } while (exception.retry);
3356 return ret;
3357}
3358
e50a1c2e
BF		 3359static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3360{
3361 struct nfs_server *server = NFS_SERVER(inode);
3362 int ret;
3363
3364 if (!nfs4_server_supports_acls(server))
3365 return -EOPNOTSUPP;
3366 ret = nfs_revalidate_inode(server, inode);
3367 if (ret < 0)
3368 return ret;
3369 ret = nfs4_read_cached_acl(inode, buf, buflen);
3370 if (ret != -ENOENT)
3371 return ret;
3372 return nfs4_get_acl_uncached(inode, buf, buflen);
3373}
3374
16b4289c 3375static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3376{
3377 struct nfs_server *server = NFS_SERVER(inode);
3378 struct page *pages[NFS4ACL_MAXPAGES];
3379 struct nfs_setaclargs arg = {
3380 .fh = NFS_FH(inode),
3381 .acl_pages = pages,
3382 .acl_len = buflen,
3383 };
73c403a9 3384 struct nfs_setaclres res;
4b580ee3
BF		 3385 struct rpc_message msg = {
3386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3387 .rpc_argp = &arg,
73c403a9 3388 .rpc_resp = &res,
4b580ee3
BF		 3389 };
3390 int ret;
3391
3392 if (!nfs4_server_supports_acls(server))
3393 return -EOPNOTSUPP;
642ac549 3394 nfs_inode_return_delegation(inode);
4b580ee3 3395 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3396 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3397 nfs_access_zap_cache(inode);
3398 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3399 return ret;
3400}
3401
16b4289c
TM		 3402static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3403{
3404 struct nfs4_exception exception = { };
3405 int err;
3406 do {
3407 err = nfs4_handle_exception(NFS_SERVER(inode),
3408 __nfs4_proc_set_acl(inode, buf, buflen),
3409 &exception);
3410 } while (exception.retry);
3411 return err;
3412}
3413
1da177e4 3414static int
8328d59f 3415_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3416{
1da177e4
LT		 3417 if (!clp || task->tk_status >= 0)
3418 return 0;
3419 switch(task->tk_status) {
9e33bed5
TM		 3420 case -NFS4ERR_ADMIN_REVOKED:
3421 case -NFS4ERR_BAD_STATEID:
3422 case -NFS4ERR_OPENMODE:
3423 if (state == NULL)
3424 break;
3425 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3426 case -NFS4ERR_STALE_CLIENTID:
3427 case -NFS4ERR_STALE_STATEID:
3428 case -NFS4ERR_EXPIRED:
5d00837b 3429 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3430 nfs4_schedule_state_recovery(clp);
e005e804 3431 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3432 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3433 task->tk_status = 0;
3434 return -EAGAIN;
4745e315
AA		 3435#if defined(CONFIG_NFS_V4_1)
3436 case -NFS4ERR_BADSESSION:
3437 case -NFS4ERR_BADSLOT:
3438 case -NFS4ERR_BAD_HIGH_SLOT:
3439 case -NFS4ERR_DEADSESSION:
3440 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3441 case -NFS4ERR_SEQ_FALSE_RETRY:
3442 case -NFS4ERR_SEQ_MISORDERED:
3443 dprintk("%s ERROR %d, Reset session\n", __func__,
3444 task->tk_status);
0b9e2d41 3445 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3446 task->tk_status = 0;
3447 return -EAGAIN;
3448#endif /* CONFIG_NFS_V4_1 */
1da177e4 3449 case -NFS4ERR_DELAY:
8328d59f
AA		 3450 if (server)
3451 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3452 case -NFS4ERR_GRACE:
1da177e4
LT		 3453 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3454 task->tk_status = 0;
3455 return -EAGAIN;
3456 case -NFS4ERR_OLD_STATEID:
3457 task->tk_status = 0;
3458 return -EAGAIN;
3459 }
3460 task->tk_status = nfs4_map_errors(task->tk_status);
3461 return 0;
3462}
3463
8328d59f
AA		 3464static int
3465nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3466{
3467 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3468}
3469
adfa6f98 3470int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3471{
3472 nfs4_verifier sc_verifier;
3473 struct nfs4_setclientid setclientid = {
3474 .sc_verifier = &sc_verifier,
3475 .sc_prog = program,
3476 };
3477 struct rpc_message msg = {
3478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3479 .rpc_argp = &setclientid,
3480 .rpc_resp = clp,
286d7d6a 3481 .rpc_cred = cred,
1da177e4 3482 };
bc4785cd 3483 __be32 *p;
1da177e4
LT		 3484 int loop = 0;
3485 int status;
3486
bc4785cd 3487 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3488 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3489 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3490
3491 for(;;) {
3492 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3493 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3494 clp->cl_ipaddr,
3495 rpc_peeraddr2str(clp->cl_rpcclient,
3496 RPC_DISPLAY_ADDR),
69dd716c
TM		 3497 rpc_peeraddr2str(clp->cl_rpcclient,
3498 RPC_DISPLAY_PROTO),
78ea323b 3499 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3500 clp->cl_id_uniquifier);
3501 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3502 sizeof(setclientid.sc_netid),
3503 rpc_peeraddr2str(clp->cl_rpcclient,
3504 RPC_DISPLAY_NETID));
1da177e4 3505 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3506 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3507 clp->cl_ipaddr, port >> 8, port & 255);
3508
3509 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3510 if (status != -NFS4ERR_CLID_INUSE)
3511 break;
3512 if (signalled())
3513 break;
3514 if (loop++ & 1)
3515 ssleep(clp->cl_lease_time + 1);
3516 else
3517 if (++clp->cl_id_uniquifier == 0)
3518 break;
3519 }
3520 return status;
3521}
3522
adfa6f98 3523static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3524{
3525 struct nfs_fsinfo fsinfo;
3526 struct rpc_message msg = {
3527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3528 .rpc_argp = clp,
3529 .rpc_resp = &fsinfo,
286d7d6a 3530 .rpc_cred = cred,
1da177e4
LT		 3531 };
3532 unsigned long now;
3533 int status;
3534
3535 now = jiffies;
3536 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3537 if (status == 0) {
3538 spin_lock(&clp->cl_lock);
3539 clp->cl_lease_time = fsinfo.lease_time * HZ;
3540 clp->cl_last_renewal = now;
3541 spin_unlock(&clp->cl_lock);
3542 }
3543 return status;
3544}
3545
adfa6f98 3546int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3547{
77e03677 3548 long timeout = 0;
51581f3b
TM		 3549 int err;
3550 do {
3551 err = _nfs4_proc_setclientid_confirm(clp, cred);
3552 switch (err) {
3553 case 0:
3554 return err;
3555 case -NFS4ERR_RESOURCE:
3556 /* The IBM lawyers misread another document! */
3557 case -NFS4ERR_DELAY:
3558 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3559 }
3560 } while (err == 0);
3561 return err;
3562}
3563
fe650407
TM		 3564struct nfs4_delegreturndata {
3565 struct nfs4_delegreturnargs args;
fa178f29 3566 struct nfs4_delegreturnres res;
fe650407
TM		 3567 struct nfs_fh fh;
3568 nfs4_stateid stateid;
26e976a8 3569 unsigned long timestamp;
fa178f29 3570 struct nfs_fattr fattr;
fe650407
TM		 3571 int rpc_status;
3572};
3573
fe650407
TM		 3574static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3575{
3576 struct nfs4_delegreturndata *data = calldata;
938e1010 3577
d61e612a
TM		 3578 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3579 task->tk_status);
938e1010 3580
79708861
RL		 3581 switch (task->tk_status) {
3582 case -NFS4ERR_STALE_STATEID:
3583 case -NFS4ERR_EXPIRED:
3584 case 0:
fa178f29 3585 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3586 break;
3587 default:
3588 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3589 -EAGAIN) {
3590 nfs_restart_rpc(task, data->res.server->nfs_client);
3591 return;
3592 }
3593 }
3594 data->rpc_status = task->tk_status;
fe650407
TM		 3595}
3596
3597static void nfs4_delegreturn_release(void *calldata)
3598{
fe650407
TM		 3599 kfree(calldata);
3600}
3601
938e1010
AA		 3602#if defined(CONFIG_NFS_V4_1)
3603static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3604{
3605 struct nfs4_delegreturndata *d_data;
3606
3607 d_data = (struct nfs4_delegreturndata *)data;
3608
3609 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3610 &d_data->args.seq_args,
3611 &d_data->res.seq_res, 1, task))
3612 return;
3613 rpc_call_start(task);
3614}
3615#endif /* CONFIG_NFS_V4_1 */
3616
c8d149f3 3617static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3618#if defined(CONFIG_NFS_V4_1)
3619 .rpc_call_prepare = nfs4_delegreturn_prepare,
3620#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3621 .rpc_call_done = nfs4_delegreturn_done,
3622 .rpc_release = nfs4_delegreturn_release,
3623};
3624
e6f81075 3625static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3626{
3627 struct nfs4_delegreturndata *data;
fa178f29 3628 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3629 struct rpc_task *task;
5138fde0
TM		 3630 struct rpc_message msg = {
3631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3632 .rpc_cred = cred,
3633 };
c970aa85
TM		 3634 struct rpc_task_setup task_setup_data = {
3635 .rpc_client = server->client,
5138fde0 3636 .rpc_message = &msg,
c970aa85
TM		 3637 .callback_ops = &nfs4_delegreturn_ops,
3638 .flags = RPC_TASK_ASYNC,
3639 };
e6f81075 3640 int status = 0;
fe650407 3641
938e1010 3642 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3643 if (data == NULL)
3644 return -ENOMEM;
3645 data->args.fhandle = &data->fh;
3646 data->args.stateid = &data->stateid;
fa178f29 3647 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3648 nfs_copy_fh(&data->fh, NFS_FH(inode));
3649 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3650 data->res.fattr = &data->fattr;
3651 data->res.server = server;
5f7dbd5c 3652 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3653 nfs_fattr_init(data->res.fattr);
26e976a8 3654 data->timestamp = jiffies;
fe650407
TM		 3655 data->rpc_status = 0;
3656
c970aa85 3657 task_setup_data.callback_data = data;
5138fde0
TM		 3658 msg.rpc_argp = &data->args,
3659 msg.rpc_resp = &data->res,
c970aa85 3660 task = rpc_run_task(&task_setup_data);
7a1218a2 3661 if (IS_ERR(task))
fe650407 3662 return PTR_ERR(task);
e6f81075
TM		 3663 if (!issync)
3664 goto out;
fe650407 3665 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3666 if (status != 0)
3667 goto out;
3668 status = data->rpc_status;
3669 if (status != 0)
3670 goto out;
3671 nfs_refresh_inode(inode, &data->fattr);
3672out:
e6b3c4db 3673 rpc_put_task(task);
fe650407 3674 return status;
1da177e4
LT		 3675}
3676
e6f81075 3677int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3678{
3679 struct nfs_server *server = NFS_SERVER(inode);
3680 struct nfs4_exception exception = { };
3681 int err;
3682 do {
e6f81075 3683 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3684 switch (err) {
3685 case -NFS4ERR_STALE_STATEID:
3686 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3687 case 0:
3688 return 0;
3689 }
3690 err = nfs4_handle_exception(server, err, &exception);
3691 } while (exception.retry);
3692 return err;
3693}
3694
3695#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3696#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3697
3698/*
3699 * sleep, with exponential backoff, and retry the LOCK operation.
3700 */
3701static unsigned long
3702nfs4_set_lock_task_retry(unsigned long timeout)
3703{
150030b7 3704 schedule_timeout_killable(timeout);
1da177e4
LT		 3705 timeout <<= 1;
3706 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3707 return NFS4_LOCK_MAXTIMEOUT;
3708 return timeout;
3709}
3710
1da177e4
LT		 3711static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3712{
3713 struct inode *inode = state->inode;
3714 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3715 struct nfs_client *clp = server->nfs_client;
911d1aaf 3716 struct nfs_lockt_args arg = {
1da177e4 3717 .fh = NFS_FH(inode),
911d1aaf 3718 .fl = request,
1da177e4 3719 };
911d1aaf
TM		 3720 struct nfs_lockt_res res = {
3721 .denied = request,
1da177e4
LT		 3722 };
3723 struct rpc_message msg = {
3724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3725 .rpc_argp = &arg,
3726 .rpc_resp = &res,
3727 .rpc_cred = state->owner->so_cred,
3728 };
1da177e4
LT		 3729 struct nfs4_lock_state *lsp;
3730 int status;
3731
911d1aaf 3732 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3733 status = nfs4_set_lock_state(state, request);
3734 if (status != 0)
3735 goto out;
3736 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3737 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3738 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3739 switch (status) {
3740 case 0:
3741 request->fl_type = F_UNLCK;
3742 break;
3743 case -NFS4ERR_DENIED:
3744 status = 0;
1da177e4 3745 }
70cc6487 3746 request->fl_ops->fl_release_private(request);
8d0a8a9d 3747out:
1da177e4
LT		 3748 return status;
3749}
3750
3751static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3752{
3753 struct nfs4_exception exception = { };
3754 int err;
3755
3756 do {
3757 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3758 _nfs4_proc_getlk(state, cmd, request),
3759 &exception);
3760 } while (exception.retry);
3761 return err;
3762}
3763
3764static int do_vfs_lock(struct file *file, struct file_lock *fl)
3765{
3766 int res = 0;
3767 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3768 case FL_POSIX:
3769 res = posix_lock_file_wait(file, fl);
3770 break;
3771 case FL_FLOCK:
3772 res = flock_lock_file_wait(file, fl);
3773 break;
3774 default:
3775 BUG();
3776 }
1da177e4
LT		 3777 return res;
3778}
3779
faf5f49c 3780struct nfs4_unlockdata {
911d1aaf
TM		 3781 struct nfs_locku_args arg;
3782 struct nfs_locku_res res;
faf5f49c
TM		 3783 struct nfs4_lock_state *lsp;
3784 struct nfs_open_context *ctx;
911d1aaf
TM		 3785 struct file_lock fl;
3786 const struct nfs_server *server;
26e976a8 3787 unsigned long timestamp;
faf5f49c
TM		 3788};
3789
911d1aaf
TM		 3790static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3791 struct nfs_open_context *ctx,
3792 struct nfs4_lock_state *lsp,
3793 struct nfs_seqid *seqid)
3794{
3795 struct nfs4_unlockdata *p;
3796 struct inode *inode = lsp->ls_state->inode;
3797
a893693c 3798 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3799 if (p == NULL)
3800 return NULL;
3801 p->arg.fh = NFS_FH(inode);
3802 p->arg.fl = &p->fl;
3803 p->arg.seqid = seqid;
c1d51931 3804 p->res.seqid = seqid;
5f7dbd5c 3805 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3806 p->arg.stateid = &lsp->ls_stateid;
3807 p->lsp = lsp;
3808 atomic_inc(&lsp->ls_count);
3809 /* Ensure we don't close file until we're done freeing locks! */
3810 p->ctx = get_nfs_open_context(ctx);
3811 memcpy(&p->fl, fl, sizeof(p->fl));
3812 p->server = NFS_SERVER(inode);
3813 return p;
3814}
3815
06f814a3 3816static void nfs4_locku_release_calldata(void *data)
faf5f49c 3817{
963d8fe5 3818 struct nfs4_unlockdata *calldata = data;
911d1aaf 3819 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3820 nfs4_put_lock_state(calldata->lsp);
3821 put_nfs_open_context(calldata->ctx);
3822 kfree(calldata);
faf5f49c
TM		 3823}
3824
963d8fe5 3825static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3826{
963d8fe5 3827 struct nfs4_unlockdata *calldata = data;
faf5f49c 3828
a893693c
AA		 3829 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3830 task->tk_status);
06f814a3
TM		 3831 if (RPC_ASSASSINATED(task))
3832 return;
faf5f49c
TM		 3833 switch (task->tk_status) {
3834 case 0:
3835 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3836 calldata->res.stateid.data,
faf5f49c 3837 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3838 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3839 break;
9e33bed5
TM		 3840 case -NFS4ERR_BAD_STATEID:
3841 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3842 case -NFS4ERR_STALE_STATEID:
3843 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3844 break;
3845 default:
9e33bed5 3846 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3847 nfs_restart_rpc(task,
d61e612a 3848 calldata->server->nfs_client);
faf5f49c 3849 }
faf5f49c
TM		 3850}
3851
4ce70ada 3852static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3853{
4ce70ada 3854 struct nfs4_unlockdata *calldata = data;
faf5f49c 3855
911d1aaf 3856 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3857 return;
3858 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3859 /* Note: exit _without_ running nfs4_locku_done */
3860 task->tk_action = NULL;
faf5f49c
TM		 3861 return;
3862 }
26e976a8 3863 calldata->timestamp = jiffies;
a893693c
AA		 3864 if (nfs4_setup_sequence(calldata->server->nfs_client,
3865 &calldata->arg.seq_args,
3866 &calldata->res.seq_res, 1, task))
3867 return;
5138fde0 3868 rpc_call_start(task);
faf5f49c
TM		 3869}
3870
963d8fe5 3871static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3872 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3873 .rpc_call_done = nfs4_locku_done,
06f814a3 3874 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3875};
3876
a5d16a4d
TM		 3877static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3878 struct nfs_open_context *ctx,
3879 struct nfs4_lock_state *lsp,
3880 struct nfs_seqid *seqid)
3881{
3882 struct nfs4_unlockdata *data;
5138fde0
TM		 3883 struct rpc_message msg = {
3884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3885 .rpc_cred = ctx->cred,
3886 };
c970aa85
TM		 3887 struct rpc_task_setup task_setup_data = {
3888 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3889 .rpc_message = &msg,
c970aa85 3890 .callback_ops = &nfs4_locku_ops,
101070ca 3891 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3892 .flags = RPC_TASK_ASYNC,
3893 };
a5d16a4d 3894
137d6aca
FF		 3895 /* Ensure this is an unlock - when canceling a lock, the
3896 * canceled lock is passed in, and it won't be an unlock.
3897 */
3898 fl->fl_type = F_UNLCK;
3899
a5d16a4d
TM		 3900 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3901 if (data == NULL) {
3902 nfs_free_seqid(seqid);
3903 return ERR_PTR(-ENOMEM);
3904 }
3905
5138fde0
TM		 3906 msg.rpc_argp = &data->arg,
3907 msg.rpc_resp = &data->res,
c970aa85
TM		 3908 task_setup_data.callback_data = data;
3909 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3910}
3911
faf5f49c
TM		 3912static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3913{
19e03c57 3914 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3915 struct nfs_seqid *seqid;
1da177e4 3916 struct nfs4_lock_state *lsp;
06f814a3
TM		 3917 struct rpc_task *task;
3918 int status = 0;
536ff0f8 3919 unsigned char fl_flags = request->fl_flags;
faf5f49c 3920
8d0a8a9d 3921 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3922 /* Unlock _before_ we do the RPC call */
3923 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3924 down_read(&nfsi->rwsem);
3925 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3926 up_read(&nfsi->rwsem);
9b073574 3927 goto out;
19e03c57
TM		 3928 }
3929 up_read(&nfsi->rwsem);
8d0a8a9d 3930 if (status != 0)
9b073574
TM		 3931 goto out;
3932 /* Is this a delegated lock? */
3933 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3934 goto out;
8d0a8a9d 3935 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3936 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3937 status = -ENOMEM;
911d1aaf 3938 if (seqid == NULL)
9b073574 3939 goto out;
cd3758e3 3940 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3941 status = PTR_ERR(task);
3942 if (IS_ERR(task))
9b073574 3943 goto out;
a5d16a4d 3944 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3945 rpc_put_task(task);
9b073574 3946out:
536ff0f8 3947 request->fl_flags = fl_flags;
1da177e4
LT		 3948 return status;
3949}
3950
a5d16a4d
TM		 3951struct nfs4_lockdata {
3952 struct nfs_lock_args arg;
3953 struct nfs_lock_res res;
3954 struct nfs4_lock_state *lsp;
3955 struct nfs_open_context *ctx;
3956 struct file_lock fl;
26e976a8 3957 unsigned long timestamp;
a5d16a4d
TM		 3958 int rpc_status;
3959 int cancelled;
66179efe 3960 struct nfs_server *server;
a5d16a4d
TM		 3961};
3962
3963static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3964 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3965{
a5d16a4d
TM		 3966 struct nfs4_lockdata *p;
3967 struct inode *inode = lsp->ls_state->inode;
1da177e4 3968 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3969
3970 p = kzalloc(sizeof(*p), GFP_KERNEL);
3971 if (p == NULL)
3972 return NULL;
3973
3974 p->arg.fh = NFS_FH(inode);
3975 p->arg.fl = &p->fl;
2f74c0a0
TM		 3976 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3977 if (p->arg.open_seqid == NULL)
3978 goto out_free;
a5d16a4d
TM		 3979 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3980 if (p->arg.lock_seqid == NULL)
2f74c0a0 3981 goto out_free_seqid;
a5d16a4d 3982 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3983 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3984 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3985 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3986 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3987 p->lsp = lsp;
66179efe 3988 p->server = server;
a5d16a4d
TM		 3989 atomic_inc(&lsp->ls_count);
3990 p->ctx = get_nfs_open_context(ctx);
3991 memcpy(&p->fl, fl, sizeof(p->fl));
3992 return p;
2f74c0a0
TM		 3993out_free_seqid:
3994 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3995out_free:
3996 kfree(p);
3997 return NULL;
3998}
3999
4000static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4001{
4002 struct nfs4_lockdata *data = calldata;
4003 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4004
3110ff80 4005 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4006 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4007 return;
a5d16a4d
TM		 4008 /* Do we need to do an open_to_lock_owner? */
4009 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4010 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4011 return;
a5d16a4d
TM		 4012 data->arg.open_stateid = &state->stateid;
4013 data->arg.new_lock_owner = 1;
c1d51931 4014 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4015 } else
4016 data->arg.new_lock_owner = 0;
26e976a8 4017 data->timestamp = jiffies;
66179efe
AA		 4018 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
4019 &data->res.seq_res, 1, task))
4020 return;
5138fde0 4021 rpc_call_start(task);
3110ff80 4022 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4023}
4024
b257957e
AB		 4025static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4026{
4027 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4028 nfs4_lock_prepare(task, calldata);
4029}
4030
a5d16a4d
TM		 4031static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4032{
4033 struct nfs4_lockdata *data = calldata;
4034
3110ff80 4035 dprintk("%s: begin!\n", __func__);
a5d16a4d 4036
d61e612a
TM		 4037 nfs4_sequence_done(data->server, &data->res.seq_res,
4038 task->tk_status);
66179efe 4039
a5d16a4d
TM		 4040 data->rpc_status = task->tk_status;
4041 if (RPC_ASSASSINATED(task))
4042 goto out;
4043 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4044 if (data->rpc_status == 0)
4045 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4046 else
4047 goto out;
4048 }
4049 if (data->rpc_status == 0) {
4050 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4051 sizeof(data->lsp->ls_stateid.data));
4052 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4053 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4054 }
a5d16a4d 4055out:
3110ff80 4056 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4057}
4058
4059static void nfs4_lock_release(void *calldata)
4060{
4061 struct nfs4_lockdata *data = calldata;
4062
3110ff80 4063 dprintk("%s: begin!\n", __func__);
2f74c0a0 4064 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4065 if (data->cancelled != 0) {
4066 struct rpc_task *task;
4067 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4068 data->arg.lock_seqid);
4069 if (!IS_ERR(task))
e6b3c4db 4070 rpc_put_task(task);
3110ff80 4071 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4072 } else
4073 nfs_free_seqid(data->arg.lock_seqid);
4074 nfs4_put_lock_state(data->lsp);
4075 put_nfs_open_context(data->ctx);
4076 kfree(data);
3110ff80 4077 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4078}
4079
4080static const struct rpc_call_ops nfs4_lock_ops = {
4081 .rpc_call_prepare = nfs4_lock_prepare,
4082 .rpc_call_done = nfs4_lock_done,
4083 .rpc_release = nfs4_lock_release,
4084};
4085
b257957e
AB		 4086static const struct rpc_call_ops nfs4_recover_lock_ops = {
4087 .rpc_call_prepare = nfs4_recover_lock_prepare,
4088 .rpc_call_done = nfs4_lock_done,
4089 .rpc_release = nfs4_lock_release,
4090};
4091
afe6c27c 4092static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4093{
4094 struct nfs4_lockdata *data;
4095 struct rpc_task *task;
5138fde0
TM		 4096 struct rpc_message msg = {
4097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4098 .rpc_cred = state->owner->so_cred,
4099 };
c970aa85
TM		 4100 struct rpc_task_setup task_setup_data = {
4101 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4102 .rpc_message = &msg,
c970aa85 4103 .callback_ops = &nfs4_lock_ops,
101070ca 4104 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4105 .flags = RPC_TASK_ASYNC,
4106 };
a5d16a4d
TM		 4107 int ret;
4108
3110ff80 4109 dprintk("%s: begin!\n", __func__);
cd3758e3 4110 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 4111 fl->fl_u.nfs4_fl.owner);
4112 if (data == NULL)
4113 return -ENOMEM;
4114 if (IS_SETLKW(cmd))
4115 data->arg.block = 1;
b257957e
AB		 4116 if (recovery_type > NFS_LOCK_NEW) {
4117 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4118 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4119 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4120 }
5138fde0
TM		 4121 msg.rpc_argp = &data->arg,
4122 msg.rpc_resp = &data->res,
c970aa85
TM		 4123 task_setup_data.callback_data = data;
4124 task = rpc_run_task(&task_setup_data);
7a1218a2 4125 if (IS_ERR(task))
a5d16a4d 4126 return PTR_ERR(task);
a5d16a4d
TM		 4127 ret = nfs4_wait_for_completion_rpc_task(task);
4128 if (ret == 0) {
4129 ret = data->rpc_status;
a5d16a4d
TM		 4130 } else
4131 data->cancelled = 1;
e6b3c4db 4132 rpc_put_task(task);
3110ff80 4133 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4134 return ret;
1da177e4
LT		 4135}
4136
4137static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4138{
202b50dc
TM		 4139 struct nfs_server *server = NFS_SERVER(state->inode);
4140 struct nfs4_exception exception = { };
4141 int err;
4142
4143 do {
42a2d13e
TM		 4144 /* Cache the lock if possible... */
4145 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4146 return 0;
afe6c27c 4147 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
202b50dc
TM		 4148 if (err != -NFS4ERR_DELAY)
4149 break;
4150 nfs4_handle_exception(server, err, &exception);
4151 } while (exception.retry);
4152 return err;
1da177e4
LT		 4153}
4154
4155static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4156{
202b50dc
TM		 4157 struct nfs_server *server = NFS_SERVER(state->inode);
4158 struct nfs4_exception exception = { };
4159 int err;
4160
6bfc93ef
TM		 4161 err = nfs4_set_lock_state(state, request);
4162 if (err != 0)
4163 return err;
202b50dc 4164 do {
42a2d13e
TM		 4165 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4166 return 0;
afe6c27c 4167 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4168 switch (err) {
4169 default:
4170 goto out;
4171 case -NFS4ERR_GRACE:
4172 case -NFS4ERR_DELAY:
4173 nfs4_handle_exception(server, err, &exception);
4174 err = 0;
4175 }
202b50dc 4176 } while (exception.retry);
a9ed2e25 4177out:
202b50dc 4178 return err;
1da177e4
LT		 4179}
4180
4181static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4182{
19e03c57 4183 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4184 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4185 int status;
4186
6bfc93ef 4187 /* Is this a delegated open? */
6bfc93ef
TM		 4188 status = nfs4_set_lock_state(state, request);
4189 if (status != 0)
4190 goto out;
01c3b861
TM		 4191 request->fl_flags |= FL_ACCESS;
4192 status = do_vfs_lock(request->fl_file, request);
4193 if (status < 0)
4194 goto out;
19e03c57 4195 down_read(&nfsi->rwsem);
01c3b861 4196 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4197 /* Yes: cache locks! */
01c3b861 4198 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4199 request->fl_flags = fl_flags & ~FL_SLEEP;
4200 status = do_vfs_lock(request->fl_file, request);
4201 goto out_unlock;
01c3b861 4202 }
afe6c27c 4203 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4204 if (status != 0)
01c3b861 4205 goto out_unlock;
6bfc93ef 4206 /* Note: we always want to sleep here! */
01c3b861 4207 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4208 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4209 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4210out_unlock:
19e03c57 4211 up_read(&nfsi->rwsem);
01c3b861
TM		 4212out:
4213 request->fl_flags = fl_flags;
1da177e4
LT		 4214 return status;
4215}
4216
4217static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4218{
4219 struct nfs4_exception exception = { };
4220 int err;
4221
4222 do {
965b5d67
TM		 4223 err = _nfs4_proc_setlk(state, cmd, request);
4224 if (err == -NFS4ERR_DENIED)
4225 err = -EAGAIN;
1da177e4 4226 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4227 err, &exception);
1da177e4
LT		 4228 } while (exception.retry);
4229 return err;
4230}
4231
4232static int
4233nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4234{
4235 struct nfs_open_context *ctx;
4236 struct nfs4_state *state;
4237 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4238 int status;
4239
4240 /* verify open state */
cd3758e3 4241 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4242 state = ctx->state;
4243
4244 if (request->fl_start < 0 || request->fl_end < 0)
4245 return -EINVAL;
4246
d953126a
TM		 4247 if (IS_GETLK(cmd)) {
4248 if (state != NULL)
4249 return nfs4_proc_getlk(state, F_GETLK, request);
4250 return 0;
4251 }
1da177e4
LT		 4252
4253 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4254 return -EINVAL;
4255
d953126a
TM		 4256 if (request->fl_type == F_UNLCK) {
4257 if (state != NULL)
4258 return nfs4_proc_unlck(state, cmd, request);
4259 return 0;
4260 }
1da177e4 4261
d953126a
TM		 4262 if (state == NULL)
4263 return -ENOLCK;
1da177e4
LT		 4264 do {
4265 status = nfs4_proc_setlk(state, cmd, request);
4266 if ((status != -EAGAIN) || IS_SETLK(cmd))
4267 break;
4268 timeout = nfs4_set_lock_task_retry(timeout);
4269 status = -ERESTARTSYS;
4270 if (signalled())
4271 break;
4272 } while(status < 0);
1da177e4
LT		 4273 return status;
4274}
4275
888e694c
TM		 4276int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4277{
4278 struct nfs_server *server = NFS_SERVER(state->inode);
4279 struct nfs4_exception exception = { };
4280 int err;
4281
4282 err = nfs4_set_lock_state(state, fl);
4283 if (err != 0)
4284 goto out;
4285 do {
afe6c27c 4286 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4287 switch (err) {
4288 default:
4289 printk(KERN_ERR "%s: unhandled error %d.\n",
4290 __func__, err);
4291 case 0:
965b5d67 4292 case -ESTALE:
d5122201
TM		 4293 goto out;
4294 case -NFS4ERR_EXPIRED:
4295 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4296 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4297 case -NFS4ERR_BADSESSION:
4298 case -NFS4ERR_BADSLOT:
4299 case -NFS4ERR_BAD_HIGH_SLOT:
4300 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4301 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4302 nfs4_schedule_state_recovery(server->nfs_client);
4303 goto out;
965b5d67
TM		 4304 case -ERESTARTSYS:
4305 /*
4306 * The show must go on: exit, but mark the
4307 * stateid as needing recovery.
4308 */
4309 case -NFS4ERR_ADMIN_REVOKED:
4310 case -NFS4ERR_BAD_STATEID:
4311 case -NFS4ERR_OPENMODE:
4312 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4313 err = 0;
4314 goto out;
4315 case -ENOMEM:
4316 case -NFS4ERR_DENIED:
4317 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4318 err = 0;
4319 goto out;
d5122201
TM		 4320 case -NFS4ERR_DELAY:
4321 break;
4322 }
888e694c
TM		 4323 err = nfs4_handle_exception(server, err, &exception);
4324 } while (exception.retry);
4325out:
4326 return err;
4327}
6b3b5496 4328
aa1870af
BF		 4329#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4330
6b3b5496
BF		 4331int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4332 size_t buflen, int flags)
4333{
4b580ee3
BF		 4334 struct inode *inode = dentry->d_inode;
4335
4336 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4337 return -EOPNOTSUPP;
4338
4b580ee3 4339 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4340}
4341
4342/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4343 * and that's what we'll do for e.g. user attributes that haven't been set.
4344 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4345 * attributes in kernel-managed attribute namespaces. */
4346ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4347 size_t buflen)
4348{
aa1870af
BF		 4349 struct inode *inode = dentry->d_inode;
4350
4351 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4352 return -EOPNOTSUPP;
4353
4354 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4355}
4356
4357ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4358{
aa1870af 4359 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4360
096455a2
BF		 4361 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4362 return 0;
6b3b5496
BF		 4363 if (buf && buflen < len)
4364 return -ERANGE;
4365 if (buf)
aa1870af
BF		 4366 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4367 return len;
6b3b5496
BF		 4368}
4369
69aaaae1
TM		 4370static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4371{
4372 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4373 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4374 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4375 return;
4376
4377 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4378 NFS_ATTR_FATTR_NLINK;
4379 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4380 fattr->nlink = 2;
4381}
4382
56659e99 4383int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4384 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4385{
4386 struct nfs_server *server = NFS_SERVER(dir);
4387 u32 bitmask[2] = {
361e624f
MN		 4388 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4389 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4390 };
4391 struct nfs4_fs_locations_arg args = {
4392 .dir_fh = NFS_FH(dir),
c228fd3a 4393 .name = name,
683b57b4
TM		 4394 .page = page,
4395 .bitmask = bitmask,
4396 };
22958463
BH		 4397 struct nfs4_fs_locations_res res = {
4398 .fs_locations = fs_locations,
4399 };
683b57b4
TM		 4400 struct rpc_message msg = {
4401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4402 .rpc_argp = &args,
22958463 4403 .rpc_resp = &res,
683b57b4
TM		 4404 };
4405 int status;
4406
3110ff80 4407 dprintk("%s: start\n", __func__);
c228fd3a 4408 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4409 fs_locations->server = server;
830b8e33 4410 fs_locations->nlocations = 0;
cccef3b9 4411 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4412 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4413 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4414 return status;
4415}
4416
557134a3 4417#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4418/*
4419 * nfs4_proc_exchange_id()
4420 *
4421 * Since the clientid has expired, all compounds using sessions
4422 * associated with the stale clientid will be returning
4423 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4424 * be in some phase of session reset.
4425 */
4d643d1d 4426int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4427{
4428 nfs4_verifier verifier;
4429 struct nfs41_exchange_id_args args = {
4430 .client = clp,
4431 .flags = clp->cl_exchange_flags,
4432 };
4433 struct nfs41_exchange_id_res res = {
4434 .client = clp,
4435 };
4436 int status;
4437 struct rpc_message msg = {
4438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4439 .rpc_argp = &args,
4440 .rpc_resp = &res,
4441 .rpc_cred = cred,
4442 };
4443 __be32 *p;
4444
4445 dprintk("--> %s\n", __func__);
4446 BUG_ON(clp == NULL);
a7b72103 4447
7b183d0d
AB		 4448 /* Remove server-only flags */
4449 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4450
99fe60d0
BH		 4451 p = (u32 *)verifier.data;
4452 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4453 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4454 args.verifier = &verifier;
4455
4456 while (1) {
4457 args.id_len = scnprintf(args.id, sizeof(args.id),
4458 "%s/%s %u",
4459 clp->cl_ipaddr,
4460 rpc_peeraddr2str(clp->cl_rpcclient,
4461 RPC_DISPLAY_ADDR),
4462 clp->cl_id_uniquifier);
4463
4464 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4465
4466 if (status != NFS4ERR_CLID_INUSE)
4467 break;
4468
4469 if (signalled())
4470 break;
4471
4472 if (++clp->cl_id_uniquifier == 0)
4473 break;
4474 }
4475
4476 dprintk("<-- %s status= %d\n", __func__, status);
4477 return status;
4478}
4479
2050f0cc
AA		 4480struct nfs4_get_lease_time_data {
4481 struct nfs4_get_lease_time_args *args;
4482 struct nfs4_get_lease_time_res *res;
4483 struct nfs_client *clp;
4484};
4485
4486static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4487 void *calldata)
4488{
4489 int ret;
4490 struct nfs4_get_lease_time_data *data =
4491 (struct nfs4_get_lease_time_data *)calldata;
4492
4493 dprintk("--> %s\n", __func__);
689cf5c1 4494 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4495 /* just setup sequence, do not trigger session recovery
4496 since we're invoked within one */
4497 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4498 &data->args->la_seq_args,
4499 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4500
4501 BUG_ON(ret == -EAGAIN);
4502 rpc_call_start(task);
4503 dprintk("<-- %s\n", __func__);
4504}
4505
4506/*
4507 * Called from nfs4_state_manager thread for session setup, so don't recover
4508 * from sequence operation or clientid errors.
4509 */
4510static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4511{
4512 struct nfs4_get_lease_time_data *data =
4513 (struct nfs4_get_lease_time_data *)calldata;
4514
4515 dprintk("--> %s\n", __func__);
4516 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4517 switch (task->tk_status) {
4518 case -NFS4ERR_DELAY:
4519 case -NFS4ERR_GRACE:
4520 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4521 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4522 task->tk_status = 0;
0110ee15 4523 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4524 return;
4525 }
2050f0cc
AA		 4526 dprintk("<-- %s\n", __func__);
4527}
4528
4529struct rpc_call_ops nfs4_get_lease_time_ops = {
4530 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4531 .rpc_call_done = nfs4_get_lease_time_done,
4532};
4533
4534int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4535{
4536 struct rpc_task *task;
4537 struct nfs4_get_lease_time_args args;
4538 struct nfs4_get_lease_time_res res = {
4539 .lr_fsinfo = fsinfo,
4540 };
4541 struct nfs4_get_lease_time_data data = {
4542 .args = &args,
4543 .res = &res,
4544 .clp = clp,
4545 };
4546 struct rpc_message msg = {
4547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4548 .rpc_argp = &args,
4549 .rpc_resp = &res,
4550 };
4551 struct rpc_task_setup task_setup = {
4552 .rpc_client = clp->cl_rpcclient,
4553 .rpc_message = &msg,
4554 .callback_ops = &nfs4_get_lease_time_ops,
4555 .callback_data = &data
4556 };
4557 int status;
4558
4559 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4560 dprintk("--> %s\n", __func__);
4561 task = rpc_run_task(&task_setup);
4562
4563 if (IS_ERR(task))
4564 status = PTR_ERR(task);
4565 else {
4566 status = task->tk_status;
4567 rpc_put_task(task);
4568 }
4569 dprintk("<-- %s return %d\n", __func__, status);
4570
4571 return status;
4572}
4573
b73dafa7
RL		 4574/*
4575 * Reset a slot table
4576 */
4577static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4578 int old_max_slots, int ivalue)
ac72b7b3 4579{
b73dafa7 4580 int i;
ac72b7b3
AA		 4581 int ret = 0;
4582
b73dafa7 4583 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4584
b73dafa7
RL		 4585 /*
4586 * Until we have dynamic slot table adjustment, insist
4587 * upon the same slot table size
4588 */
ac72b7b3
AA		 4589 if (max_slots != old_max_slots) {
4590 dprintk("%s reset slot table does't match old\n",
4591 __func__);
4592 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4593 goto out;
4594 }
4595 spin_lock(&tbl->slot_tbl_lock);
4596 for (i = 0; i < max_slots; ++i)
b73dafa7 4597 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4598 spin_unlock(&tbl->slot_tbl_lock);
4599 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4600 tbl, tbl->slots, tbl->max_slots);
4601out:
4602 dprintk("<-- %s: return %d\n", __func__, ret);
4603 return ret;
4604}
4605
b73dafa7
RL		 4606/*
4607 * Reset the forechannel and backchannel slot tables
4608 */
4609static int nfs4_reset_slot_tables(struct nfs4_session *session)
4610{
4611 int status;
4612
4613 status = nfs4_reset_slot_table(&session->fc_slot_table,
4614 session->fc_attrs.max_reqs,
4615 session->fc_slot_table.max_slots,
4616 1);
f8625a6a
RL		 4617 if (status)
4618 return status;
4619
4620 status = nfs4_reset_slot_table(&session->bc_slot_table,
4621 session->bc_attrs.max_reqs,
4622 session->bc_slot_table.max_slots,
4623 0);
b73dafa7
RL		 4624 return status;
4625}
4626
f8625a6a
RL		 4627/* Destroy the slot table */
4628static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4629{
4630 if (session->fc_slot_table.slots != NULL) {
4631 kfree(session->fc_slot_table.slots);
4632 session->fc_slot_table.slots = NULL;
4633 }
4634 if (session->bc_slot_table.slots != NULL) {
4635 kfree(session->bc_slot_table.slots);
4636 session->bc_slot_table.slots = NULL;
4637 }
4638 return;
4639}
4640
fc931582
AA		 4641/*
4642 * Initialize slot table
4643 */
050047ce
RL		 4644static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4645 int max_slots, int ivalue)
fc931582 4646{
fc931582
AA		 4647 struct nfs4_slot *slot;
4648 int ret = -ENOMEM;
4649
4650 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4651
050047ce 4652 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4653
4654 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4655 if (!slot)
4656 goto out;
fc931582
AA		 4657 ret = 0;
4658
4659 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4660 tbl->max_slots = max_slots;
4661 tbl->slots = slot;
4662 tbl->highest_used_slotid = -1; /* no slot is currently used */
4663 spin_unlock(&tbl->slot_tbl_lock);
4664 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4665 tbl, tbl->slots, tbl->max_slots);
4666out:
4667 dprintk("<-- %s: return %d\n", __func__, ret);
4668 return ret;
fc931582
AA		 4669}
4670
050047ce
RL		 4671/*
4672 * Initialize the forechannel and backchannel tables
4673 */
4674static int nfs4_init_slot_tables(struct nfs4_session *session)
4675{
f26468fb
TM		 4676 struct nfs4_slot_table *tbl;
4677 int status = 0;
050047ce 4678
f26468fb
TM		 4679 tbl = &session->fc_slot_table;
4680 if (tbl->slots == NULL) {
4681 status = nfs4_init_slot_table(tbl,
4682 session->fc_attrs.max_reqs, 1);
4683 if (status)
4684 return status;
4685 }
050047ce 4686
f26468fb
TM		 4687 tbl = &session->bc_slot_table;
4688 if (tbl->slots == NULL) {
4689 status = nfs4_init_slot_table(tbl,
4690 session->bc_attrs.max_reqs, 0);
4691 if (status)
4692 nfs4_destroy_slot_tables(session);
4693 }
f8625a6a
RL		 4694
4695 return status;
557134a3
AA		 4696}
4697
4698struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4699{
4700 struct nfs4_session *session;
4701 struct nfs4_slot_table *tbl;
4702
4703 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4704 if (!session)
4705 return NULL;
76db6d95 4706
76db6d95
AA		 4707 /*
4708 * The create session reply races with the server back
4709 * channel probe. Mark the client NFS_CS_SESSION_INITING
4710 * so that the client back channel can find the
4711 * nfs_client struct
4712 */
4713 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4714 init_completion(&session->complete);
76db6d95 4715
557134a3 4716 tbl = &session->fc_slot_table;
9dfdf404 4717 tbl->highest_used_slotid = -1;
557134a3 4718 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4719 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4720
4721 tbl = &session->bc_slot_table;
9dfdf404 4722 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4723 spin_lock_init(&tbl->slot_tbl_lock);
4724 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4725
557134a3
AA		 4726 session->clp = clp;
4727 return session;
4728}
4729
4730void nfs4_destroy_session(struct nfs4_session *session)
4731{
5a0ffe54
AA		 4732 nfs4_proc_destroy_session(session);
4733 dprintk("%s Destroy backchannel for xprt %p\n",
4734 __func__, session->clp->cl_rpcclient->cl_xprt);
4735 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4736 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4737 nfs4_destroy_slot_tables(session);
557134a3
AA		 4738 kfree(session);
4739}
4740
fc931582
AA		 4741/*
4742 * Initialize the values to be used by the client in CREATE_SESSION
4743 * If nfs4_init_session set the fore channel request and response sizes,
4744 * use them.
4745 *
4746 * Set the back channel max_resp_sz_cached to zero to force the client to
4747 * always set csa_cachethis to FALSE because the current implementation
4748 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4749 */
4750static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4751{
4752 struct nfs4_session *session = args->client->cl_session;
4753 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4754 mxresp_sz = session->fc_attrs.max_resp_sz;
4755
4756 if (mxrqst_sz == 0)
4757 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4758 if (mxresp_sz == 0)
4759 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4760 /* Fore channel attributes */
4761 args->fc_attrs.headerpadsz = 0;
4762 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4763 args->fc_attrs.max_resp_sz = mxresp_sz;
4764 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4765 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4766 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4767
4768 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4769 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4770 __func__,
4771 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4772 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4773 args->fc_attrs.max_reqs);
4774
4775 /* Back channel attributes */
4776 args->bc_attrs.headerpadsz = 0;
4777 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4778 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4779 args->bc_attrs.max_resp_sz_cached = 0;
4780 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4781 args->bc_attrs.max_reqs = 1;
4782
4783 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4784 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4785 __func__,
4786 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4787 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4788 args->bc_attrs.max_reqs);
4789}
4790
8d35301d
AA		 4791static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4792{
4793 if (rcvd <= sent)
4794 return 0;
4795 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4796 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4797 return -EINVAL;
4798}
4799
4800#define _verify_fore_channel_attr(_name_) \
4801 _verify_channel_attr("fore", #_name_, \
4802 args->fc_attrs._name_, \
4803 session->fc_attrs._name_)
4804
4805#define _verify_back_channel_attr(_name_) \
4806 _verify_channel_attr("back", #_name_, \
4807 args->bc_attrs._name_, \
4808 session->bc_attrs._name_)
4809
4810/*
4811 * The server is not allowed to increase the fore channel header pad size,
4812 * maximum response size, or maximum number of operations.
4813 *
4814 * The back channel attributes are only negotiatied down: We send what the
4815 * (back channel) server insists upon.
4816 */
4817static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4818 struct nfs4_session *session)
4819{
4820 int ret = 0;
4821
4822 ret |= _verify_fore_channel_attr(headerpadsz);
4823 ret |= _verify_fore_channel_attr(max_resp_sz);
4824 ret |= _verify_fore_channel_attr(max_ops);
4825
4826 ret |= _verify_back_channel_attr(headerpadsz);
4827 ret |= _verify_back_channel_attr(max_rqst_sz);
4828 ret |= _verify_back_channel_attr(max_resp_sz);
4829 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4830 ret |= _verify_back_channel_attr(max_ops);
4831 ret |= _verify_back_channel_attr(max_reqs);
4832
4833 return ret;
4834}
4835
fc931582
AA		 4836static int _nfs4_proc_create_session(struct nfs_client *clp)
4837{
4838 struct nfs4_session *session = clp->cl_session;
4839 struct nfs41_create_session_args args = {
4840 .client = clp,
4841 .cb_program = NFS4_CALLBACK,
4842 };
4843 struct nfs41_create_session_res res = {
4844 .client = clp,
4845 };
4846 struct rpc_message msg = {
4847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4848 .rpc_argp = &args,
4849 .rpc_resp = &res,
4850 };
4851 int status;
4852
4853 nfs4_init_channel_attrs(&args);
0f91421e 4854 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4855
4856 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4857
8d35301d
AA		 4858 if (!status)
4859 /* Verify the session's negotiated channel_attrs values */
4860 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4861 if (!status) {
4862 /* Increment the clientid slot sequence id */
4863 clp->cl_seqid++;
4864 }
4865
4866 return status;
4867}
4868
4869/*
4870 * Issues a CREATE_SESSION operation to the server.
4871 * It is the responsibility of the caller to verify the session is
4872 * expired before calling this routine.
4873 */
f26468fb 4874int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4875{
4876 int status;
4877 unsigned *ptr;
fc931582
AA		 4878 struct nfs4_session *session = clp->cl_session;
4879
4880 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4881
4882 status = _nfs4_proc_create_session(clp);
4883 if (status)
4884 goto out;
4885
f26468fb
TM		 4886 /* Init and reset the fore channel */
4887 status = nfs4_init_slot_tables(session);
4888 dprintk("slot table initialization returned %d\n", status);
4889 if (status)
4890 goto out;
4891 status = nfs4_reset_slot_tables(session);
4892 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4893 if (status)
4894 goto out;
4895
4896 ptr = (unsigned *)&session->sess_id.data[0];
4897 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4898 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4899out:
4900 dprintk("<-- %s\n", __func__);
4901 return status;
4902}
4903
0f3e66c6
AA		 4904/*
4905 * Issue the over-the-wire RPC DESTROY_SESSION.
4906 * The caller must serialize access to this routine.
4907 */
4908int nfs4_proc_destroy_session(struct nfs4_session *session)
4909{
4910 int status = 0;
4911 struct rpc_message msg;
4912
4913 dprintk("--> nfs4_proc_destroy_session\n");
4914
4915 /* session is still being setup */
4916 if (session->clp->cl_cons_state != NFS_CS_READY)
4917 return status;
4918
4919 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4920 msg.rpc_argp = session;
4921 msg.rpc_resp = NULL;
4922 msg.rpc_cred = NULL;
4923 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4924
4925 if (status)
4926 printk(KERN_WARNING
4927 "Got error %d from the server on DESTROY_SESSION. "
4928 "Session has been destroyed regardless...\n", status);
4929
4930 dprintk("<-- nfs4_proc_destroy_session\n");
4931 return status;
4932}
4933
fccba804
TM		 4934int nfs4_init_session(struct nfs_server *server)
4935{
4936 struct nfs_client *clp = server->nfs_client;
2449ea2e 4937 struct nfs4_session *session;
68bf05ef 4938 unsigned int rsize, wsize;
fccba804
TM		 4939 int ret;
4940
4941 if (!nfs4_has_session(clp))
4942 return 0;
4943
68bf05ef
AA		 4944 rsize = server->rsize;
4945 if (rsize == 0)
4946 rsize = NFS_MAX_FILE_IO_SIZE;
4947 wsize = server->wsize;
4948 if (wsize == 0)
4949 wsize = NFS_MAX_FILE_IO_SIZE;
4950
2449ea2e 4951 session = clp->cl_session;
68bf05ef
AA		 4952 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
4953 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 4954
fccba804
TM		 4955 ret = nfs4_recover_expired_lease(server);
4956 if (!ret)
4957 ret = nfs4_check_client_ready(clp);
4958 return ret;
4959}
4960
fc01cea9
AA		 4961/*
4962 * Renew the cl_session lease.
4963 */
4964static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4965{
4966 struct nfs4_sequence_args args;
4967 struct nfs4_sequence_res res;
4968
4969 struct rpc_message msg = {
4970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4971 .rpc_argp = &args,
4972 .rpc_resp = &res,
4973 .rpc_cred = cred,
4974 };
4975
4976 args.sa_cache_this = 0;
4977
4978 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
b257957e 4979 &res, args.sa_cache_this, 1);
fc01cea9
AA		 4980}
4981
4982void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4983{
4984 struct nfs_client *clp = (struct nfs_client *)data;
4985
4986 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4987
4988 if (task->tk_status < 0) {
4989 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4990
4991 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4992 == -EAGAIN) {
0110ee15 4993 nfs_restart_rpc(task, clp);
fc01cea9
AA		 4994 return;
4995 }
4996 }
fc01cea9
AA		 4997 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4998
fc01cea9
AA		 4999 kfree(task->tk_msg.rpc_argp);
5000 kfree(task->tk_msg.rpc_resp);
5001
5002 dprintk("<-- %s\n", __func__);
5003}
5004
5005static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5006{
5007 struct nfs_client *clp;
5008 struct nfs4_sequence_args *args;
5009 struct nfs4_sequence_res *res;
5010
5011 clp = (struct nfs_client *)data;
5012 args = task->tk_msg.rpc_argp;
5013 res = task->tk_msg.rpc_resp;
5014
5015 if (nfs4_setup_sequence(clp, args, res, 0, task))
5016 return;
5017 rpc_call_start(task);
5018}
5019
5020static const struct rpc_call_ops nfs41_sequence_ops = {
5021 .rpc_call_done = nfs41_sequence_call_done,
5022 .rpc_call_prepare = nfs41_sequence_prepare,
5023};
5024
5025static int nfs41_proc_async_sequence(struct nfs_client *clp,
5026 struct rpc_cred *cred)
5027{
5028 struct nfs4_sequence_args *args;
5029 struct nfs4_sequence_res *res;
5030 struct rpc_message msg = {
5031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5032 .rpc_cred = cred,
5033 };
5034
5035 args = kzalloc(sizeof(*args), GFP_KERNEL);
5036 if (!args)
5037 return -ENOMEM;
5038 res = kzalloc(sizeof(*res), GFP_KERNEL);
5039 if (!res) {
5040 kfree(args);
5041 return -ENOMEM;
5042 }
5043 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
5044 msg.rpc_argp = args;
5045 msg.rpc_resp = res;
5046
5047 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
5048 &nfs41_sequence_ops, (void *)clp);
5049}
5050
fce5c838
RL		 5051struct nfs4_reclaim_complete_data {
5052 struct nfs_client *clp;
5053 struct nfs41_reclaim_complete_args arg;
5054 struct nfs41_reclaim_complete_res res;
5055};
5056
5057static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5058{
5059 struct nfs4_reclaim_complete_data *calldata = data;
5060
b257957e 5061 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
fce5c838
RL		 5062 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
5063 &calldata->res.seq_res, 0, task))
5064 return;
5065
5066 rpc_call_start(task);
5067}
5068
5069static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5070{
5071 struct nfs4_reclaim_complete_data *calldata = data;
5072 struct nfs_client *clp = calldata->clp;
5073 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5074
5075 dprintk("--> %s\n", __func__);
5076 nfs41_sequence_done(clp, res, task->tk_status);
5077 switch (task->tk_status) {
5078 case 0:
5079 case -NFS4ERR_COMPLETE_ALREADY:
5080 break;
5081 case -NFS4ERR_BADSESSION:
5082 case -NFS4ERR_DEADSESSION:
5083 /*
5084 * Handle the session error, but do not retry the operation, as
5085 * we have no way of telling whether the clientid had to be
5086 * reset before we got our reply. If reset, a new wave of
5087 * reclaim operations will follow, containing their own reclaim
5088 * complete. We don't want our retry to get on the way of
5089 * recovery by incorrectly indicating to the server that we're
5090 * done reclaiming state since the process had to be restarted.
5091 */
5092 _nfs4_async_handle_error(task, NULL, clp, NULL);
5093 break;
5094 default:
5095 if (_nfs4_async_handle_error(
5096 task, NULL, clp, NULL) == -EAGAIN) {
5097 rpc_restart_call_prepare(task);
5098 return;
5099 }
5100 }
fce5c838
RL		 5101
5102 dprintk("<-- %s\n", __func__);
5103}
5104
5105static void nfs4_free_reclaim_complete_data(void *data)
5106{
5107 struct nfs4_reclaim_complete_data *calldata = data;
5108
5109 kfree(calldata);
5110}
5111
5112static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5113 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5114 .rpc_call_done = nfs4_reclaim_complete_done,
5115 .rpc_release = nfs4_free_reclaim_complete_data,
5116};
5117
5118/*
5119 * Issue a global reclaim complete.
5120 */
5121static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5122{
5123 struct nfs4_reclaim_complete_data *calldata;
5124 struct rpc_task *task;
5125 struct rpc_message msg = {
5126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5127 };
5128 struct rpc_task_setup task_setup_data = {
5129 .rpc_client = clp->cl_rpcclient,
5130 .rpc_message = &msg,
5131 .callback_ops = &nfs4_reclaim_complete_call_ops,
5132 .flags = RPC_TASK_ASYNC,
5133 };
5134 int status = -ENOMEM;
5135
5136 dprintk("--> %s\n", __func__);
5137 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5138 if (calldata == NULL)
5139 goto out;
5140 calldata->clp = clp;
5141 calldata->arg.one_fs = 0;
5142 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5143
5144 msg.rpc_argp = &calldata->arg;
5145 msg.rpc_resp = &calldata->res;
5146 task_setup_data.callback_data = calldata;
5147 task = rpc_run_task(&task_setup_data);
5148 if (IS_ERR(task))
5149 status = PTR_ERR(task);
5150 rpc_put_task(task);
5151out:
5152 dprintk("<-- %s status=%d\n", __func__, status);
5153 return status;
5154}
557134a3
AA		 5155#endif /* CONFIG_NFS_V4_1 */
5156
591d71cb 5157struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5158 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5159 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5160 .recover_open = nfs4_open_reclaim,
5161 .recover_lock = nfs4_lock_reclaim,
591d71cb 5162 .establish_clid = nfs4_init_clientid,
90a16617 5163 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5164};
5165
591d71cb
AA		 5166#if defined(CONFIG_NFS_V4_1)
5167struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5168 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5169 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5170 .recover_open = nfs4_open_reclaim,
5171 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5172 .establish_clid = nfs41_init_clientid,
b4b82607 5173 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5174 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5175};
5176#endif /* CONFIG_NFS_V4_1 */
5177
5178struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5179 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5180 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5181 .recover_open = nfs4_open_expired,
5182 .recover_lock = nfs4_lock_expired,
5183 .establish_clid = nfs4_init_clientid,
90a16617 5184 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5185};
5186
5187#if defined(CONFIG_NFS_V4_1)
5188struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5189 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5190 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5191 .recover_open = nfs4_open_expired,
5192 .recover_lock = nfs4_lock_expired,
4d643d1d 5193 .establish_clid = nfs41_init_clientid,
b4b82607 5194 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5195};
591d71cb 5196#endif /* CONFIG_NFS_V4_1 */
1da177e4 5197
29fba38b
BH		 5198struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5199 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5200 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5201 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5202};
5203
5204#if defined(CONFIG_NFS_V4_1)
5205struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5206 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5207 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5208 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5209};
5210#endif
5211
5212/*
5213 * Per minor version reboot and network partition recovery ops
5214 */
5215
591d71cb
AA		 5216struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5217 &nfs40_reboot_recovery_ops,
5218#if defined(CONFIG_NFS_V4_1)
5219 &nfs41_reboot_recovery_ops,
5220#endif
5221};
5222
5223struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5224 &nfs40_nograce_recovery_ops,
5225#if defined(CONFIG_NFS_V4_1)
5226 &nfs41_nograce_recovery_ops,
5227#endif
5228};
5229
29fba38b
BH		 5230struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5231 &nfs40_state_renewal_ops,
5232#if defined(CONFIG_NFS_V4_1)
5233 &nfs41_state_renewal_ops,
5234#endif
5235};
5236
92e1d5be 5237static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5238 .permission = nfs_permission,
5239 .getattr = nfs_getattr,
5240 .setattr = nfs_setattr,
5241 .getxattr = nfs4_getxattr,
5242 .setxattr = nfs4_setxattr,
5243 .listxattr = nfs4_listxattr,
5244};
5245
509de811 5246const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5247 .version = 4, /* protocol version */
5248 .dentry_ops = &nfs4_dentry_operations,
5249 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5250 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5251 .getroot = nfs4_proc_get_root,
5252 .getattr = nfs4_proc_getattr,
5253 .setattr = nfs4_proc_setattr,
2b3de441 5254 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5255 .lookup = nfs4_proc_lookup,
5256 .access = nfs4_proc_access,
5257 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5258 .create = nfs4_proc_create,
5259 .remove = nfs4_proc_remove,
5260 .unlink_setup = nfs4_proc_unlink_setup,
5261 .unlink_done = nfs4_proc_unlink_done,
5262 .rename = nfs4_proc_rename,
5263 .link = nfs4_proc_link,
5264 .symlink = nfs4_proc_symlink,
5265 .mkdir = nfs4_proc_mkdir,
5266 .rmdir = nfs4_proc_remove,
5267 .readdir = nfs4_proc_readdir,
5268 .mknod = nfs4_proc_mknod,
5269 .statfs = nfs4_proc_statfs,
5270 .fsinfo = nfs4_proc_fsinfo,
5271 .pathconf = nfs4_proc_pathconf,
e9326dca 5272 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5273 .decode_dirent = nfs4_decode_dirent,
5274 .read_setup = nfs4_proc_read_setup,
ec06c096 5275 .read_done = nfs4_read_done,
1da177e4 5276 .write_setup = nfs4_proc_write_setup,
788e7a89 5277 .write_done = nfs4_write_done,
1da177e4 5278 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5279 .commit_done = nfs4_commit_done,
1da177e4 5280 .lock = nfs4_proc_lock,
e50a1c2e 5281 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5282 .close_context = nfs4_close_context,
1da177e4
LT		 5283};
5284
5285/*
5286 * Local variables:
5287 * c-basic-offset: 8
5288 * End:
5289 */
Linux 6.x block layer and io_uring tree(s)