projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
nfs: kill renewd before clearing client minor version
[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);
a2c0b9e2 252 goto do_state_recovery;
65de872e 253 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 254 if (state == NULL)
255 break;
256 nfs4_state_mark_reclaim_reboot(clp, state);
257 case -NFS4ERR_STALE_CLIENTID:
65de872e 258 case -NFS4ERR_EXPIRED:
a2c0b9e2 259 goto do_state_recovery;
03391693 260#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 261 case -NFS4ERR_BADSESSION:
262 case -NFS4ERR_BADSLOT:
263 case -NFS4ERR_BAD_HIGH_SLOT:
264 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
265 case -NFS4ERR_DEADSESSION:
266 case -NFS4ERR_SEQ_FALSE_RETRY:
267 case -NFS4ERR_SEQ_MISORDERED:
268 dprintk("%s ERROR: %d Reset session\n", __func__,
269 errorcode);
0b9e2d41 270 nfs4_schedule_state_recovery(clp);
4745e315 271 exception->retry = 1;
b9179237 272 break;
03391693 273#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 274 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 275 if (exception->timeout > HZ) {
276 /* We have retried a decent amount, time to
277 * fail
278 */
279 ret = -EBUSY;
280 break;
281 }
65de872e
TM		 282 case -NFS4ERR_GRACE:
283 case -NFS4ERR_DELAY:
2c643488 284 case -EKEYEXPIRED:
65de872e
TM		 285 ret = nfs4_delay(server->client, &exception->timeout);
286 if (ret != 0)
287 break;
288 case -NFS4ERR_OLD_STATEID:
289 exception->retry = 1;
290 }
291 /* We failed to handle the error */
292 return nfs4_map_errors(ret);
a2c0b9e2
TM		 293do_state_recovery:
294 nfs4_schedule_state_recovery(clp);
295 ret = nfs4_wait_clnt_recover(clp);
296 if (ret == 0)
297 exception->retry = 1;
298 return ret;
65de872e
TM		 299}
300
301
26e976a8 302static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 303{
7539bbab 304 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 305 spin_lock(&clp->cl_lock);
306 if (time_before(clp->cl_last_renewal,timestamp))
307 clp->cl_last_renewal = timestamp;
308 spin_unlock(&clp->cl_lock);
309}
310
cccef3b9
AA		 311#if defined(CONFIG_NFS_V4_1)
312
e2c4ab3c
AA		 313/*
314 * nfs4_free_slot - free a slot and efficiently update slot table.
315 *
316 * freeing a slot is trivially done by clearing its respective bit
317 * in the bitmap.
318 * If the freed slotid equals highest_used_slotid we want to update it
319 * so that the server would be able to size down the slot table if needed,
320 * otherwise we know that the highest_used_slotid is still in use.
321 * When updating highest_used_slotid there may be "holes" in the bitmap
322 * so we need to scan down from highest_used_slotid to 0 looking for the now
323 * highest slotid in use.
324 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 325 *
326 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 327 */
328static void
329nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
330{
331 int slotid = free_slotid;
332
e2c4ab3c
AA		 333 /* clear used bit in bitmap */
334 __clear_bit(slotid, tbl->used_slots);
335
336 /* update highest_used_slotid when it is freed */
337 if (slotid == tbl->highest_used_slotid) {
338 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 339 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 340 tbl->highest_used_slotid = slotid;
341 else
342 tbl->highest_used_slotid = -1;
343 }
e2c4ab3c
AA		 344 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
345 free_slotid, tbl->highest_used_slotid);
346}
347
3bfb0fc5
AB		 348/*
349 * Signal state manager thread if session is drained
350 */
351static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
352{
689cf5c1
AB		 353 struct rpc_task *task;
354
3bfb0fc5 355 if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
689cf5c1
AB		 356 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
357 if (task)
358 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 359 return;
360 }
361
362 if (ses->fc_slot_table.highest_used_slotid != -1)
363 return;
364
365 dprintk("%s COMPLETE: Session Drained\n", __func__);
366 complete(&ses->complete);
367}
368
d61e612a 369static void nfs41_sequence_free_slot(const struct nfs_client *clp,
13615871
AA		 370 struct nfs4_sequence_res *res)
371{
372 struct nfs4_slot_table *tbl;
373
13615871
AA		 374 tbl = &clp->cl_session->fc_slot_table;
375 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 376 /* just wake up the next guy waiting since
377 * we may have not consumed a slot after all */
691daf3b 378 dprintk("%s: No slot\n", __func__);
35dc1d74 379 return;
13615871 380 }
ea028ac9 381
35dc1d74
TM		 382 spin_lock(&tbl->slot_tbl_lock);
383 nfs4_free_slot(tbl, res->sr_slotid);
3bfb0fc5 384 nfs41_check_drain_session_complete(clp->cl_session);
35dc1d74
TM		 385 spin_unlock(&tbl->slot_tbl_lock);
386 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 387}
388
b0df806c
AA		 389static void nfs41_sequence_done(struct nfs_client *clp,
390 struct nfs4_sequence_res *res,
391 int rpc_status)
392{
393 unsigned long timestamp;
394 struct nfs4_slot_table *tbl;
395 struct nfs4_slot *slot;
396
397 /*
398 * sr_status remains 1 if an RPC level error occurred. The server
399 * may or may not have processed the sequence operation..
400 * Proceed as if the server received and processed the sequence
401 * operation.
402 */
403 if (res->sr_status == 1)
404 res->sr_status = NFS_OK;
405
406 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
407 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
408 goto out;
409
691daf3b 410 /* Check the SEQUENCE operation status */
b0df806c 411 if (res->sr_status == 0) {
691daf3b
AA		 412 tbl = &clp->cl_session->fc_slot_table;
413 slot = tbl->slots + res->sr_slotid;
b0df806c
AA		 414 /* Update the slot's sequence and clientid lease timer */
415 ++slot->seq_nr;
416 timestamp = res->sr_renewal_time;
417 spin_lock(&clp->cl_lock);
418 if (time_before(clp->cl_last_renewal, timestamp))
419 clp->cl_last_renewal = timestamp;
420 spin_unlock(&clp->cl_lock);
0629e370
AB		 421 /* Check sequence flags */
422 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
b0df806c
AA		 423 }
424out:
425 /* The session may be reset by one of the error handlers. */
426 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
427 nfs41_sequence_free_slot(clp, res);
428}
429
510b8175
BH		 430/*
431 * nfs4_find_slot - efficiently look for a free slot
432 *
433 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
434 * If found, we mark the slot as used, update the highest_used_slotid,
435 * and respectively set up the sequence operation args.
436 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 437 *
438 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 439 */
440static u8
40ead580 441nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 442{
443 int slotid;
444 u8 ret_id = NFS4_MAX_SLOT_TABLE;
445 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
446
510b8175
BH		 447 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
448 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
449 tbl->max_slots);
450 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
451 if (slotid >= tbl->max_slots)
452 goto out;
453 __set_bit(slotid, tbl->used_slots);
454 if (slotid > tbl->highest_used_slotid)
455 tbl->highest_used_slotid = slotid;
456 ret_id = slotid;
457out:
458 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
459 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 460 return ret_id;
461}
462
ce5039c1
AA		 463static int nfs41_setup_sequence(struct nfs4_session *session,
464 struct nfs4_sequence_args *args,
465 struct nfs4_sequence_res *res,
466 int cache_reply,
467 struct rpc_task *task)
468{
fbcd4abc
AA		 469 struct nfs4_slot *slot;
470 struct nfs4_slot_table *tbl;
471 u8 slotid;
472
473 dprintk("--> %s\n", __func__);
ce5039c1
AA		 474 /* slot already allocated? */
475 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
476 return 0;
477
478 memset(res, 0, sizeof(*res));
479 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 480 tbl = &session->fc_slot_table;
481
482 spin_lock(&tbl->slot_tbl_lock);
5601a00d
AB		 483 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
484 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 485 /*
486 * The state manager will wait until the slot table is empty.
487 * Schedule the reset thread
488 */
05f0d236 489 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 490 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 491 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 492 return -EAGAIN;
b069d94a
AA		 493 }
494
689cf5c1
AB		 495 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
496 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
497 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
498 spin_unlock(&tbl->slot_tbl_lock);
499 dprintk("%s enforce FIFO order\n", __func__);
500 return -EAGAIN;
501 }
502
40ead580 503 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 504 if (slotid == NFS4_MAX_SLOT_TABLE) {
505 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
506 spin_unlock(&tbl->slot_tbl_lock);
507 dprintk("<-- %s: no free slots\n", __func__);
508 return -EAGAIN;
509 }
510 spin_unlock(&tbl->slot_tbl_lock);
511
689cf5c1 512 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 513 slot = tbl->slots + slotid;
99fe60d0 514 args->sa_session = session;
fbcd4abc
AA		 515 args->sa_slotid = slotid;
516 args->sa_cache_this = cache_reply;
517
518 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
519
99fe60d0 520 res->sr_session = session;
fbcd4abc
AA		 521 res->sr_slotid = slotid;
522 res->sr_renewal_time = jiffies;
523 /*
524 * sr_status is only set in decode_sequence, and so will remain
525 * set to 1 if an rpc level failure occurs.
526 */
527 res->sr_status = 1;
ce5039c1
AA		 528 return 0;
529}
530
531int nfs4_setup_sequence(struct nfs_client *clp,
532 struct nfs4_sequence_args *args,
533 struct nfs4_sequence_res *res,
534 int cache_reply,
535 struct rpc_task *task)
536{
537 int ret = 0;
538
539 dprintk("--> %s clp %p session %p sr_slotid %d\n",
540 __func__, clp, clp->cl_session, res->sr_slotid);
541
542 if (!nfs4_has_session(clp))
543 goto out;
544 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
545 task);
2628eddf 546 if (ret && ret != -EAGAIN) {
ce5039c1
AA		 547 /* terminate rpc task */
548 task->tk_status = ret;
549 task->tk_action = NULL;
550 }
551out:
552 dprintk("<-- %s status=%d\n", __func__, ret);
553 return ret;
554}
555
556struct nfs41_call_sync_data {
557 struct nfs_client *clp;
558 struct nfs4_sequence_args *seq_args;
559 struct nfs4_sequence_res *seq_res;
560 int cache_reply;
561};
562
563static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
564{
565 struct nfs41_call_sync_data *data = calldata;
566
567 dprintk("--> %s data->clp->cl_session %p\n", __func__,
568 data->clp->cl_session);
569 if (nfs4_setup_sequence(data->clp, data->seq_args,
570 data->seq_res, data->cache_reply, task))
571 return;
572 rpc_call_start(task);
573}
574
b257957e
AB		 575static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
576{
577 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
578 nfs41_call_sync_prepare(task, calldata);
579}
580
69ab40c4
AA		 581static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
582{
583 struct nfs41_call_sync_data *data = calldata;
584
585 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
69ab40c4
AA		 586}
587
ce5039c1
AA		 588struct rpc_call_ops nfs41_call_sync_ops = {
589 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 590 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 591};
592
b257957e
AB		 593struct rpc_call_ops nfs41_call_priv_sync_ops = {
594 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
595 .rpc_call_done = nfs41_call_sync_done,
596};
597
ce5039c1
AA		 598static int nfs4_call_sync_sequence(struct nfs_client *clp,
599 struct rpc_clnt *clnt,
600 struct rpc_message *msg,
601 struct nfs4_sequence_args *args,
602 struct nfs4_sequence_res *res,
b257957e
AB		 603 int cache_reply,
604 int privileged)
ce5039c1
AA		 605{
606 int ret;
607 struct rpc_task *task;
608 struct nfs41_call_sync_data data = {
609 .clp = clp,
610 .seq_args = args,
611 .seq_res = res,
612 .cache_reply = cache_reply,
613 };
614 struct rpc_task_setup task_setup = {
615 .rpc_client = clnt,
616 .rpc_message = msg,
617 .callback_ops = &nfs41_call_sync_ops,
618 .callback_data = &data
619 };
620
621 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 622 if (privileged)
623 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 624 task = rpc_run_task(&task_setup);
625 if (IS_ERR(task))
626 ret = PTR_ERR(task);
627 else {
628 ret = task->tk_status;
629 rpc_put_task(task);
630 }
631 return ret;
632}
633
cccef3b9
AA		 634int _nfs4_call_sync_session(struct nfs_server *server,
635 struct rpc_message *msg,
636 struct nfs4_sequence_args *args,
637 struct nfs4_sequence_res *res,
638 int cache_reply)
639{
ce5039c1 640 return nfs4_call_sync_sequence(server->nfs_client, server->client,
b257957e 641 msg, args, res, cache_reply, 0);
cccef3b9
AA		 642}
643
644#endif /* CONFIG_NFS_V4_1 */
645
646int _nfs4_call_sync(struct nfs_server *server,
647 struct rpc_message *msg,
648 struct nfs4_sequence_args *args,
649 struct nfs4_sequence_res *res,
650 int cache_reply)
651{
f3752975 652 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 653 return rpc_call_sync(server->client, msg, 0);
654}
655
656#define nfs4_call_sync(server, msg, args, res, cache_reply) \
657 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
658 &(res)->seq_res, (cache_reply))
659
b0df806c
AA		 660static void nfs4_sequence_done(const struct nfs_server *server,
661 struct nfs4_sequence_res *res, int rpc_status)
662{
663#ifdef CONFIG_NFS_V4_1
664 if (nfs4_has_session(server->nfs_client))
665 nfs41_sequence_done(server->nfs_client, res, rpc_status);
666#endif /* CONFIG_NFS_V4_1 */
667}
668
38478b24 669static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 670{
38478b24 671 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 672
38478b24 673 spin_lock(&dir->i_lock);
40d24704
TM		 674 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
675 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 676 nfs_force_lookup_revalidate(dir);
40d24704 677 nfsi->change_attr = cinfo->after;
38478b24 678 spin_unlock(&dir->i_lock);
1da177e4
LT		 679}
680
e56e0b78 681struct nfs4_opendata {
c6d00e63 682 struct kref kref;
e56e0b78
TM		 683 struct nfs_openargs o_arg;
684 struct nfs_openres o_res;
cdd4e68b
TM		 685 struct nfs_open_confirmargs c_arg;
686 struct nfs_open_confirmres c_res;
e56e0b78
TM		 687 struct nfs_fattr f_attr;
688 struct nfs_fattr dir_attr;
ad389da7 689 struct path path;
e56e0b78
TM		 690 struct dentry *dir;
691 struct nfs4_state_owner *owner;
aac00a8d 692 struct nfs4_state *state;
e56e0b78 693 struct iattr attrs;
26e976a8 694 unsigned long timestamp;
3e309914 695 unsigned int rpc_done : 1;
24ac23ab
TM		 696 int rpc_status;
697 int cancelled;
e56e0b78
TM		 698};
699
2ced46c2
TM		 700
701static void nfs4_init_opendata_res(struct nfs4_opendata *p)
702{
703 p->o_res.f_attr = &p->f_attr;
704 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 705 p->o_res.seqid = p->o_arg.seqid;
706 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 707 p->o_res.server = p->o_arg.server;
708 nfs_fattr_init(&p->f_attr);
709 nfs_fattr_init(&p->dir_attr);
578e4585 710 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 711}
712
ad389da7 713static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 714 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 715 const struct iattr *attrs)
716{
ad389da7 717 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 718 struct inode *dir = parent->d_inode;
719 struct nfs_server *server = NFS_SERVER(dir);
720 struct nfs4_opendata *p;
721
722 p = kzalloc(sizeof(*p), GFP_KERNEL);
723 if (p == NULL)
724 goto err;
725 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
726 if (p->o_arg.seqid == NULL)
727 goto err_free;
ad389da7
TM		 728 p->path.mnt = mntget(path->mnt);
729 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 730 p->dir = parent;
731 p->owner = sp;
732 atomic_inc(&sp->so_count);
733 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 734 p->o_arg.open_flags = flags;
735 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 736 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 737 p->o_arg.id = sp->so_owner_id.id;
ad389da7 738 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 739 p->o_arg.server = server;
740 p->o_arg.bitmask = server->attr_bitmask;
741 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78 742 if (flags & O_EXCL) {
4882ef72
AB		 743 if (nfs4_has_persistent_session(server->nfs_client)) {
744 /* GUARDED */
745 p->o_arg.u.attrs = &p->attrs;
746 memcpy(&p->attrs, attrs, sizeof(p->attrs));
747 } else { /* EXCLUSIVE4_1 */
748 u32 *s = (u32 *) p->o_arg.u.verifier.data;
749 s[0] = jiffies;
750 s[1] = current->pid;
751 }
e56e0b78
TM		 752 } else if (flags & O_CREAT) {
753 p->o_arg.u.attrs = &p->attrs;
754 memcpy(&p->attrs, attrs, sizeof(p->attrs));
755 }
cdd4e68b
TM		 756 p->c_arg.fh = &p->o_res.fh;
757 p->c_arg.stateid = &p->o_res.stateid;
758 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 759 nfs4_init_opendata_res(p);
c6d00e63 760 kref_init(&p->kref);
e56e0b78
TM		 761 return p;
762err_free:
763 kfree(p);
764err:
765 dput(parent);
766 return NULL;
767}
768
c6d00e63 769static void nfs4_opendata_free(struct kref *kref)
e56e0b78 770{
c6d00e63
TM		 771 struct nfs4_opendata *p = container_of(kref,
772 struct nfs4_opendata, kref);
773
774 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 775 if (p->state != NULL)
776 nfs4_put_open_state(p->state);
c6d00e63
TM		 777 nfs4_put_state_owner(p->owner);
778 dput(p->dir);
31f31db1 779 path_put(&p->path);
c6d00e63
TM		 780 kfree(p);
781}
782
783static void nfs4_opendata_put(struct nfs4_opendata *p)
784{
785 if (p != NULL)
786 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 787}
788
06f814a3
TM		 789static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
790{
06f814a3
TM		 791 int ret;
792
06f814a3 793 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 794 return ret;
795}
796
dc0b027d 797static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 798{
799 int ret = 0;
dc0b027d
TM		 800
801 if (open_mode & O_EXCL)
802 goto out;
803 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 804 case FMODE_READ:
88069f77
TM		 805 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
806 && state->n_rdonly != 0;
6ee41268
TM		 807 break;
808 case FMODE_WRITE:
88069f77
TM		 809 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
810 && state->n_wronly != 0;
6ee41268
TM		 811 break;
812 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 813 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
814 && state->n_rdwr != 0;
6ee41268 815 }
dc0b027d 816out:
6ee41268
TM		 817 return ret;
818}
819
dc0b027d 820static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 821{
dc0b027d 822 if ((delegation->type & fmode) != fmode)
aac00a8d 823 return 0;
15c831bf 824 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 825 return 0;
b7391f44 826 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 827 return 1;
828}
829
dc0b027d 830static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 831{
dc0b027d 832 switch (fmode) {
e7616923
TM		 833 case FMODE_WRITE:
834 state->n_wronly++;
835 break;
836 case FMODE_READ:
837 state->n_rdonly++;
838 break;
839 case FMODE_READ|FMODE_WRITE:
840 state->n_rdwr++;
841 }
dc0b027d 842 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 843}
844
dc0b027d 845static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 846{
847 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
848 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
849 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 850 switch (fmode) {
003707c7
TM		 851 case FMODE_READ:
852 set_bit(NFS_O_RDONLY_STATE, &state->flags);
853 break;
854 case FMODE_WRITE:
855 set_bit(NFS_O_WRONLY_STATE, &state->flags);
856 break;
857 case FMODE_READ|FMODE_WRITE:
858 set_bit(NFS_O_RDWR_STATE, &state->flags);
859 }
e7616923
TM		 860}
861
dc0b027d 862static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 863{
8bda4e4c 864 write_seqlock(&state->seqlock);
dc0b027d 865 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 866 write_sequnlock(&state->seqlock);
003707c7
TM		 867}
868
dc0b027d 869static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 870{
8bda4e4c
TM		 871 /*
872 * Protect the call to nfs4_state_set_mode_locked and
873 * serialise the stateid update
874 */
875 write_seqlock(&state->seqlock);
003707c7
TM		 876 if (deleg_stateid != NULL) {
877 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
878 set_bit(NFS_DELEGATED_STATE, &state->flags);
879 }
880 if (open_stateid != NULL)
dc0b027d 881 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 882 write_sequnlock(&state->seqlock);
883 spin_lock(&state->owner->so_lock);
dc0b027d 884 update_open_stateflags(state, fmode);
ec073428 885 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 886}
887
dc0b027d 888static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 889{
890 struct nfs_inode *nfsi = NFS_I(state->inode);
891 struct nfs_delegation *deleg_cur;
892 int ret = 0;
893
dc0b027d 894 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 895
896 rcu_read_lock();
897 deleg_cur = rcu_dereference(nfsi->delegation);
898 if (deleg_cur == NULL)
899 goto no_delegation;
900
901 spin_lock(&deleg_cur->lock);
902 if (nfsi->delegation != deleg_cur ||
dc0b027d 903 (deleg_cur->type & fmode) != fmode)
34310430
TM		 904 goto no_delegation_unlock;
905
906 if (delegation == NULL)
907 delegation = &deleg_cur->stateid;
908 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
909 goto no_delegation_unlock;
910
b7391f44 911 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 912 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 913 ret = 1;
914no_delegation_unlock:
915 spin_unlock(&deleg_cur->lock);
916no_delegation:
917 rcu_read_unlock();
918
919 if (!ret && open_stateid != NULL) {
dc0b027d 920 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 921 ret = 1;
922 }
923
924 return ret;
925}
926
927
dc0b027d 928static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 929{
930 struct nfs_delegation *delegation;
931
932 rcu_read_lock();
933 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 934 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 935 rcu_read_unlock();
936 return;
937 }
938 rcu_read_unlock();
939 nfs_inode_return_delegation(inode);
940}
941
6ee41268 942static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 943{
944 struct nfs4_state *state = opendata->state;
945 struct nfs_inode *nfsi = NFS_I(state->inode);
946 struct nfs_delegation *delegation;
dc0b027d
TM		 947 int open_mode = opendata->o_arg.open_flags & O_EXCL;
948 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 949 nfs4_stateid stateid;
950 int ret = -EAGAIN;
951
aac00a8d 952 for (;;) {
dc0b027d 953 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 954 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 955 if (can_open_cached(state, fmode, open_mode)) {
956 update_open_stateflags(state, fmode);
6ee41268 957 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 958 goto out_return_state;
959 }
960 spin_unlock(&state->owner->so_lock);
961 }
34310430
TM		 962 rcu_read_lock();
963 delegation = rcu_dereference(nfsi->delegation);
964 if (delegation == NULL ||
dc0b027d 965 !can_open_delegated(delegation, fmode)) {
34310430 966 rcu_read_unlock();
aac00a8d 967 break;
34310430 968 }
aac00a8d
TM		 969 /* Save the delegation */
970 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
971 rcu_read_unlock();
af22f94a 972 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 973 if (ret != 0)
974 goto out;
975 ret = -EAGAIN;
34310430
TM		 976
977 /* Try to update the stateid using the delegation */
dc0b027d 978 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 979 goto out_return_state;
aac00a8d 980 }
aac00a8d
TM		 981out:
982 return ERR_PTR(ret);
983out_return_state:
984 atomic_inc(&state->count);
985 return state;
986}
987
24ac23ab
TM		 988static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
989{
990 struct inode *inode;
991 struct nfs4_state *state = NULL;
003707c7 992 struct nfs_delegation *delegation;
1b370bc2 993 int ret;
24ac23ab 994
aac00a8d 995 if (!data->rpc_done) {
6ee41268 996 state = nfs4_try_open_cached(data);
aac00a8d
TM		 997 goto out;
998 }
999
1b370bc2 1000 ret = -EAGAIN;
24ac23ab 1001 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1002 goto err;
24ac23ab 1003 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1004 ret = PTR_ERR(inode);
03f28e3a 1005 if (IS_ERR(inode))
1b370bc2
TM		 1006 goto err;
1007 ret = -ENOMEM;
24ac23ab
TM		 1008 state = nfs4_get_open_state(inode, data->owner);
1009 if (state == NULL)
1b370bc2 1010 goto err_put_inode;
549d6ed5 1011 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1012 int delegation_flags = 0;
1013
003707c7
TM		 1014 rcu_read_lock();
1015 delegation = rcu_dereference(NFS_I(inode)->delegation);
1016 if (delegation)
1017 delegation_flags = delegation->flags;
1018 rcu_read_unlock();
15c831bf 1019 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1020 nfs_inode_set_delegation(state->inode,
1021 data->owner->so_cred,
1022 &data->o_res);
1023 else
1024 nfs_inode_reclaim_delegation(state->inode,
1025 data->owner->so_cred,
1026 &data->o_res);
1027 }
34310430
TM		 1028
1029 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1030 data->o_arg.fmode);
24ac23ab 1031 iput(inode);
aac00a8d 1032out:
24ac23ab 1033 return state;
1b370bc2
TM		 1034err_put_inode:
1035 iput(inode);
1036err:
1037 return ERR_PTR(ret);
24ac23ab
TM		 1038}
1039
864472e9
TM		 1040static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1041{
1042 struct nfs_inode *nfsi = NFS_I(state->inode);
1043 struct nfs_open_context *ctx;
1044
1045 spin_lock(&state->inode->i_lock);
1046 list_for_each_entry(ctx, &nfsi->open_files, list) {
1047 if (ctx->state != state)
1048 continue;
1049 get_nfs_open_context(ctx);
1050 spin_unlock(&state->inode->i_lock);
1051 return ctx;
1052 }
1053 spin_unlock(&state->inode->i_lock);
1054 return ERR_PTR(-ENOENT);
1055}
1056
6f220ed5
TM		 1057static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1058{
1059 struct nfs4_opendata *opendata;
1060
dc0b027d 1061 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1062 if (opendata == NULL)
1063 return ERR_PTR(-ENOMEM);
1064 opendata->state = state;
1065 atomic_inc(&state->count);
1066 return opendata;
1067}
1068
dc0b027d 1069static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1070{
2ced46c2 1071 struct nfs4_state *newstate;
864472e9
TM		 1072 int ret;
1073
dc0b027d
TM		 1074 opendata->o_arg.open_flags = 0;
1075 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1076 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1077 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1078 nfs4_init_opendata_res(opendata);
b257957e 1079 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1080 if (ret != 0)
1081 return ret;
2ced46c2 1082 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1083 if (IS_ERR(newstate))
1084 return PTR_ERR(newstate);
dc0b027d 1085 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1086 *res = newstate;
864472e9
TM		 1087 return 0;
1088}
1089
1090static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1091{
864472e9 1092 struct nfs4_state *newstate;
864472e9
TM		 1093 int ret;
1094
1095 /* memory barrier prior to reading state->n_* */
2ced46c2 1096 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1097 smp_rmb();
1098 if (state->n_rdwr != 0) {
2ced46c2 1099 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1100 if (ret != 0)
1101 return ret;
2ced46c2
TM		 1102 if (newstate != state)
1103 return -ESTALE;
864472e9
TM		 1104 }
1105 if (state->n_wronly != 0) {
2ced46c2 1106 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1107 if (ret != 0)
1108 return ret;
2ced46c2
TM		 1109 if (newstate != state)
1110 return -ESTALE;
864472e9
TM		 1111 }
1112 if (state->n_rdonly != 0) {
2ced46c2 1113 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1114 if (ret != 0)
1115 return ret;
2ced46c2
TM		 1116 if (newstate != state)
1117 return -ESTALE;
864472e9 1118 }
1ac7e2fd
TM		 1119 /*
1120 * We may have performed cached opens for all three recoveries.
1121 * Check if we need to update the current stateid.
1122 */
1123 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1124 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1125 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1126 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1127 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1128 write_sequnlock(&state->seqlock);
1ac7e2fd 1129 }
864472e9
TM		 1130 return 0;
1131}
1132
1da177e4
LT		 1133/*
1134 * OPEN_RECLAIM:
1135 * reclaim state on the server after a reboot.
1da177e4 1136 */
539cd03a 1137static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1138{
1ac7e2fd 1139 struct nfs_delegation *delegation;
864472e9 1140 struct nfs4_opendata *opendata;
dc0b027d 1141 fmode_t delegation_type = 0;
1da177e4
LT		 1142 int status;
1143
6f220ed5
TM		 1144 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1145 if (IS_ERR(opendata))
1146 return PTR_ERR(opendata);
864472e9
TM		 1147 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1148 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1149 rcu_read_lock();
1150 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1151 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1152 delegation_type = delegation->type;
1ac7e2fd 1153 rcu_read_unlock();
864472e9
TM		 1154 opendata->o_arg.u.delegation_type = delegation_type;
1155 status = nfs4_open_recover(opendata, state);
c6d00e63 1156 nfs4_opendata_put(opendata);
1da177e4
LT		 1157 return status;
1158}
1159
539cd03a 1160static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1161{
1162 struct nfs_server *server = NFS_SERVER(state->inode);
1163 struct nfs4_exception exception = { };
1164 int err;
1165 do {
539cd03a 1166 err = _nfs4_do_open_reclaim(ctx, state);
2c643488 1167 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 1168 break;
1169 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1170 } while (exception.retry);
1171 return err;
1172}
1173
864472e9
TM		 1174static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1175{
1176 struct nfs_open_context *ctx;
1177 int ret;
1178
1179 ctx = nfs4_state_find_open_context(state);
1180 if (IS_ERR(ctx))
1181 return PTR_ERR(ctx);
539cd03a 1182 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1183 put_nfs_open_context(ctx);
1184 return ret;
1185}
1186
13437e12 1187static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1188{
e56e0b78 1189 struct nfs4_opendata *opendata;
864472e9 1190 int ret;
1da177e4 1191
6f220ed5
TM		 1192 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1193 if (IS_ERR(opendata))
1194 return PTR_ERR(opendata);
e56e0b78 1195 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1196 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1197 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1198 ret = nfs4_open_recover(opendata, state);
c6d00e63 1199 nfs4_opendata_put(opendata);
864472e9 1200 return ret;
1da177e4
LT		 1201}
1202
13437e12 1203int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1204{
1205 struct nfs4_exception exception = { };
539cd03a 1206 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1207 int err;
1208 do {
13437e12 1209 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1210 switch (err) {
1211 case 0:
965b5d67
TM		 1212 case -ENOENT:
1213 case -ESTALE:
1214 goto out;
bcfa49f6
RL		 1215 case -NFS4ERR_BADSESSION:
1216 case -NFS4ERR_BADSLOT:
1217 case -NFS4ERR_BAD_HIGH_SLOT:
1218 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1219 case -NFS4ERR_DEADSESSION:
1220 nfs4_schedule_state_recovery(
1221 server->nfs_client);
1222 goto out;
1da177e4
LT		 1223 case -NFS4ERR_STALE_CLIENTID:
1224 case -NFS4ERR_STALE_STATEID:
1225 case -NFS4ERR_EXPIRED:
1226 /* Don't recall a delegation if it was lost */
7539bbab 1227 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1228 goto out;
1229 case -ERESTARTSYS:
1230 /*
1231 * The show must go on: exit, but mark the
1232 * stateid as needing recovery.
1233 */
1234 case -NFS4ERR_ADMIN_REVOKED:
1235 case -NFS4ERR_BAD_STATEID:
1236 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1237 case -ENOMEM:
1238 err = 0;
1239 goto out;
1da177e4
LT		 1240 }
1241 err = nfs4_handle_exception(server, err, &exception);
1242 } while (exception.retry);
965b5d67 1243out:
1da177e4
LT		 1244 return err;
1245}
1246
cdd4e68b
TM		 1247static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1248{
1249 struct nfs4_opendata *data = calldata;
1250
1251 data->rpc_status = task->tk_status;
1252 if (RPC_ASSASSINATED(task))
1253 return;
26e976a8 1254 if (data->rpc_status == 0) {
cdd4e68b
TM		 1255 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1256 sizeof(data->o_res.stateid.data));
bb22629e 1257 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1258 renew_lease(data->o_res.server, data->timestamp);
3e309914 1259 data->rpc_done = 1;
26e976a8 1260 }
cdd4e68b
TM		 1261}
1262
1263static void nfs4_open_confirm_release(void *calldata)
1264{
1265 struct nfs4_opendata *data = calldata;
1266 struct nfs4_state *state = NULL;
1267
1268 /* If this request hasn't been cancelled, do nothing */
1269 if (data->cancelled == 0)
1270 goto out_free;
1271 /* In case of error, no cleanup! */
3e309914 1272 if (!data->rpc_done)
cdd4e68b 1273 goto out_free;
cdd4e68b 1274 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1275 if (!IS_ERR(state))
dc0b027d 1276 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1277out_free:
c6d00e63 1278 nfs4_opendata_put(data);
cdd4e68b
TM		 1279}
1280
1281static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1282 .rpc_call_done = nfs4_open_confirm_done,
1283 .rpc_release = nfs4_open_confirm_release,
1284};
1285
1286/*
1287 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1288 */
1289static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1290{
1291 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1292 struct rpc_task *task;
5138fde0
TM		 1293 struct rpc_message msg = {
1294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1295 .rpc_argp = &data->c_arg,
1296 .rpc_resp = &data->c_res,
1297 .rpc_cred = data->owner->so_cred,
1298 };
c970aa85
TM		 1299 struct rpc_task_setup task_setup_data = {
1300 .rpc_client = server->client,
5138fde0 1301 .rpc_message = &msg,
c970aa85
TM		 1302 .callback_ops = &nfs4_open_confirm_ops,
1303 .callback_data = data,
101070ca 1304 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1305 .flags = RPC_TASK_ASYNC,
1306 };
1da177e4
LT		 1307 int status;
1308
c6d00e63 1309 kref_get(&data->kref);
3e309914
TM		 1310 data->rpc_done = 0;
1311 data->rpc_status = 0;
5138fde0 1312 data->timestamp = jiffies;
c970aa85 1313 task = rpc_run_task(&task_setup_data);
7a1218a2 1314 if (IS_ERR(task))
cdd4e68b 1315 return PTR_ERR(task);
cdd4e68b
TM		 1316 status = nfs4_wait_for_completion_rpc_task(task);
1317 if (status != 0) {
1318 data->cancelled = 1;
1319 smp_wmb();
1320 } else
1321 status = data->rpc_status;
e6b3c4db 1322 rpc_put_task(task);
1da177e4
LT		 1323 return status;
1324}
1325
24ac23ab 1326static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1327{
24ac23ab
TM		 1328 struct nfs4_opendata *data = calldata;
1329 struct nfs4_state_owner *sp = data->owner;
5138fde0 1330
24ac23ab
TM		 1331 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1332 return;
aac00a8d
TM		 1333 /*
1334 * Check if we still need to send an OPEN call, or if we can use
1335 * a delegation instead.
1336 */
1337 if (data->state != NULL) {
1338 struct nfs_delegation *delegation;
1339
dc0b027d 1340 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1341 goto out_no_action;
aac00a8d
TM		 1342 rcu_read_lock();
1343 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1344 if (delegation != NULL &&
15c831bf 1345 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1346 rcu_read_unlock();
6ee41268 1347 goto out_no_action;
aac00a8d
TM		 1348 }
1349 rcu_read_unlock();
1350 }
24ac23ab 1351 /* Update sequence id. */
9f958ab8 1352 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1353 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1354 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1355 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1356 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1357 }
26e976a8 1358 data->timestamp = jiffies;
d898528c
AA		 1359 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1360 &data->o_arg.seq_args,
1361 &data->o_res.seq_res, 1, task))
1362 return;
5138fde0 1363 rpc_call_start(task);
6ee41268
TM		 1364 return;
1365out_no_action:
1366 task->tk_action = NULL;
1367
24ac23ab 1368}
1da177e4 1369
b257957e
AB		 1370static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1371{
1372 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1373 nfs4_open_prepare(task, calldata);
1374}
1375
24ac23ab
TM		 1376static void nfs4_open_done(struct rpc_task *task, void *calldata)
1377{
1378 struct nfs4_opendata *data = calldata;
1da177e4 1379
24ac23ab 1380 data->rpc_status = task->tk_status;
d898528c 1381
d61e612a
TM		 1382 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1383 task->tk_status);
d898528c 1384
24ac23ab
TM		 1385 if (RPC_ASSASSINATED(task))
1386 return;
1387 if (task->tk_status == 0) {
1388 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1389 case S_IFREG:
1390 break;
1391 case S_IFLNK:
24ac23ab 1392 data->rpc_status = -ELOOP;
6f926b5b
TM		 1393 break;
1394 case S_IFDIR:
24ac23ab 1395 data->rpc_status = -EISDIR;
6f926b5b
TM		 1396 break;
1397 default:
24ac23ab 1398 data->rpc_status = -ENOTDIR;
6f926b5b 1399 }
26e976a8 1400 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1401 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1402 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1403 }
3e309914 1404 data->rpc_done = 1;
24ac23ab 1405}
6f926b5b 1406
24ac23ab
TM		 1407static void nfs4_open_release(void *calldata)
1408{
1409 struct nfs4_opendata *data = calldata;
1410 struct nfs4_state *state = NULL;
1411
1412 /* If this request hasn't been cancelled, do nothing */
1413 if (data->cancelled == 0)
1414 goto out_free;
1415 /* In case of error, no cleanup! */
3e309914 1416 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1417 goto out_free;
1418 /* In case we need an open_confirm, no cleanup! */
1419 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1420 goto out_free;
24ac23ab 1421 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1422 if (!IS_ERR(state))
dc0b027d 1423 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1424out_free:
c6d00e63 1425 nfs4_opendata_put(data);
24ac23ab
TM		 1426}
1427
1428static const struct rpc_call_ops nfs4_open_ops = {
1429 .rpc_call_prepare = nfs4_open_prepare,
1430 .rpc_call_done = nfs4_open_done,
1431 .rpc_release = nfs4_open_release,
1432};
1433
b257957e
AB		 1434static const struct rpc_call_ops nfs4_recover_open_ops = {
1435 .rpc_call_prepare = nfs4_recover_open_prepare,
1436 .rpc_call_done = nfs4_open_done,
1437 .rpc_release = nfs4_open_release,
1438};
1439
1440static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1441{
1442 struct inode *dir = data->dir->d_inode;
1443 struct nfs_server *server = NFS_SERVER(dir);
1444 struct nfs_openargs *o_arg = &data->o_arg;
1445 struct nfs_openres *o_res = &data->o_res;
1446 struct rpc_task *task;
5138fde0
TM		 1447 struct rpc_message msg = {
1448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1449 .rpc_argp = o_arg,
1450 .rpc_resp = o_res,
1451 .rpc_cred = data->owner->so_cred,
1452 };
c970aa85
TM		 1453 struct rpc_task_setup task_setup_data = {
1454 .rpc_client = server->client,
5138fde0 1455 .rpc_message = &msg,
c970aa85
TM		 1456 .callback_ops = &nfs4_open_ops,
1457 .callback_data = data,
101070ca 1458 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1459 .flags = RPC_TASK_ASYNC,
1460 };
24ac23ab
TM		 1461 int status;
1462
c6d00e63 1463 kref_get(&data->kref);
3e309914
TM		 1464 data->rpc_done = 0;
1465 data->rpc_status = 0;
2ced46c2 1466 data->cancelled = 0;
b257957e
AB		 1467 if (isrecover)
1468 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1469 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1470 if (IS_ERR(task))
1471 return PTR_ERR(task);
1472 status = nfs4_wait_for_completion_rpc_task(task);
1473 if (status != 0) {
1474 data->cancelled = 1;
1475 smp_wmb();
1476 } else
1477 status = data->rpc_status;
1478 rpc_put_task(task);
1479
1480 return status;
1481}
1482
1483static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1484{
1485 struct inode *dir = data->dir->d_inode;
1486 struct nfs_openres *o_res = &data->o_res;
1487 int status;
1488
1489 status = nfs4_run_open_task(data, 1);
1490 if (status != 0 || !data->rpc_done)
1491 return status;
1492
1493 nfs_refresh_inode(dir, o_res->dir_attr);
1494
1495 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1496 status = _nfs4_proc_open_confirm(data);
1497 if (status != 0)
1498 return status;
1499 }
1500
1501 return status;
1502}
1503
1504/*
1505 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1506 */
1507static int _nfs4_proc_open(struct nfs4_opendata *data)
1508{
1509 struct inode *dir = data->dir->d_inode;
1510 struct nfs_server *server = NFS_SERVER(dir);
1511 struct nfs_openargs *o_arg = &data->o_arg;
1512 struct nfs_openres *o_res = &data->o_res;
1513 int status;
1514
1515 status = nfs4_run_open_task(data, 0);
3e309914 1516 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1517 return status;
1518
56ae19f3
TM		 1519 if (o_arg->open_flags & O_CREAT) {
1520 update_changeattr(dir, &o_res->cinfo);
1521 nfs_post_op_update_inode(dir, o_res->dir_attr);
1522 } else
1523 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1524 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1525 status = _nfs4_proc_open_confirm(data);
1da177e4 1526 if (status != 0)
24ac23ab 1527 return status;
1da177e4
LT		 1528 }
1529 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1530 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1531 return 0;
1da177e4
LT		 1532}
1533
10afec90 1534static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1535{
7539bbab 1536 struct nfs_client *clp = server->nfs_client;
a78cb57a 1537 unsigned int loop;
6b30954e 1538 int ret;
58d9714a 1539
a78cb57a 1540 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1541 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1542 if (ret != 0)
a78cb57a 1543 break;
e598d843
TM		 1544 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1545 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1546 break;
58d9714a 1547 nfs4_schedule_state_recovery(clp);
a78cb57a 1548 ret = -EIO;
6b30954e 1549 }
a78cb57a 1550 return ret;
58d9714a
TM		 1551}
1552
1da177e4
LT		 1553/*
1554 * OPEN_EXPIRED:
1555 * reclaim state on the server after a network partition.
1556 * Assumes caller holds the appropriate lock
1557 */
539cd03a 1558static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1559{
e56e0b78 1560 struct nfs4_opendata *opendata;
864472e9 1561 int ret;
1da177e4 1562
6f220ed5
TM		 1563 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1564 if (IS_ERR(opendata))
1565 return PTR_ERR(opendata);
864472e9 1566 ret = nfs4_open_recover(opendata, state);
35d05778 1567 if (ret == -ESTALE)
539cd03a 1568 d_drop(ctx->path.dentry);
c6d00e63 1569 nfs4_opendata_put(opendata);
864472e9 1570 return ret;
1da177e4
LT		 1571}
1572
a9ed2e25 1573static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1574{
539cd03a 1575 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1576 struct nfs4_exception exception = { };
1577 int err;
1578
1579 do {
539cd03a 1580 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1581 switch (err) {
1582 default:
1583 goto out;
1584 case -NFS4ERR_GRACE:
1585 case -NFS4ERR_DELAY:
2c643488 1586 case -EKEYEXPIRED:
a9ed2e25
TM		 1587 nfs4_handle_exception(server, err, &exception);
1588 err = 0;
1589 }
202b50dc 1590 } while (exception.retry);
a9ed2e25 1591out:
202b50dc
TM		 1592 return err;
1593}
1594
1da177e4
LT		 1595static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1596{
1da177e4 1597 struct nfs_open_context *ctx;
864472e9 1598 int ret;
1da177e4 1599
864472e9
TM		 1600 ctx = nfs4_state_find_open_context(state);
1601 if (IS_ERR(ctx))
1602 return PTR_ERR(ctx);
539cd03a 1603 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1604 put_nfs_open_context(ctx);
1605 return ret;
1da177e4
LT		 1606}
1607
aa53ed54
JL		 1608/*
1609 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1610 * fields corresponding to attributes that were used to store the verifier.
1611 * Make sure we clobber those fields in the later setattr call
1612 */
1613static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1614{
1615 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1616 !(sattr->ia_valid & ATTR_ATIME_SET))
1617 sattr->ia_valid |= ATTR_ATIME;
1618
1619 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1620 !(sattr->ia_valid & ATTR_MTIME_SET))
1621 sattr->ia_valid |= ATTR_MTIME;
1622}
1623
1da177e4 1624/*
24ac23ab 1625 * Returns a referenced nfs4_state
1da177e4 1626 */
dc0b027d 1627static 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		 1628{
1629 struct nfs4_state_owner *sp;
1630 struct nfs4_state *state = NULL;
1631 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1632 struct nfs4_opendata *opendata;
aac00a8d 1633 int status;
1da177e4
LT		 1634
1635 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1636 status = -ENOMEM;
1637 if (!(sp = nfs4_get_state_owner(server, cred))) {
1638 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1639 goto out_err;
1640 }
58d9714a
TM		 1641 status = nfs4_recover_expired_lease(server);
1642 if (status != 0)
b4454fe1 1643 goto err_put_state_owner;
aac00a8d 1644 if (path->dentry->d_inode != NULL)
dc0b027d 1645 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1646 status = -ENOMEM;
dc0b027d 1647 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1648 if (opendata == NULL)
95d35cb4 1649 goto err_put_state_owner;
1da177e4 1650
aac00a8d
TM		 1651 if (path->dentry->d_inode != NULL)
1652 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1653
24ac23ab 1654 status = _nfs4_proc_open(opendata);
1da177e4 1655 if (status != 0)
c6d00e63 1656 goto err_opendata_put;
1da177e4 1657
aa53ed54
JL		 1658 if (opendata->o_arg.open_flags & O_EXCL)
1659 nfs4_exclusive_attrset(opendata, sattr);
1660
24ac23ab 1661 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1662 status = PTR_ERR(state);
1663 if (IS_ERR(state))
c6d00e63 1664 goto err_opendata_put;
8e469ebd
TM		 1665 if ((opendata->o_res.rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) != 0)
1666 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
c6d00e63 1667 nfs4_opendata_put(opendata);
1da177e4 1668 nfs4_put_state_owner(sp);
1da177e4
LT		 1669 *res = state;
1670 return 0;
c6d00e63
TM		 1671err_opendata_put:
1672 nfs4_opendata_put(opendata);
e56e0b78
TM		 1673err_put_state_owner:
1674 nfs4_put_state_owner(sp);
1da177e4 1675out_err:
1da177e4
LT		 1676 *res = NULL;
1677 return status;
1678}
1679
1680
dc0b027d 1681static 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		 1682{
1683 struct nfs4_exception exception = { };
1684 struct nfs4_state *res;
1685 int status;
1686
1687 do {
dc0b027d 1688 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1689 if (status == 0)
1690 break;
1691 /* NOTE: BAD_SEQID means the server and client disagree about the
1692 * book-keeping w.r.t. state-changing operations
1693 * (OPEN/CLOSE/LOCK/LOCKU...)
1694 * It is actually a sign of a bug on the client or on the server.
1695 *
1696 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1697 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1698 * have unhashed the old state_owner for us, and that we can
1699 * therefore safely retry using a new one. We should still warn
1700 * the user though...
1701 */
1702 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1703 printk(KERN_WARNING "NFS: v4 server %s "
1704 " returned a bad sequence-id error!\n",
1705 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1706 exception.retry = 1;
1707 continue;
1708 }
550f5747
TM		 1709 /*
1710 * BAD_STATEID on OPEN means that the server cancelled our
1711 * state before it received the OPEN_CONFIRM.
1712 * Recover by retrying the request as per the discussion
1713 * on Page 181 of RFC3530.
1714 */
1715 if (status == -NFS4ERR_BAD_STATEID) {
1716 exception.retry = 1;
1717 continue;
1718 }
aac00a8d
TM		 1719 if (status == -EAGAIN) {
1720 /* We must have found a delegation */
1721 exception.retry = 1;
1722 continue;
1723 }
1da177e4
LT		 1724 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1725 status, &exception));
1726 } while (exception.retry);
1727 return res;
1728}
1729
659bfcd6
TM		 1730static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1731 struct nfs_fattr *fattr, struct iattr *sattr,
1732 struct nfs4_state *state)
1da177e4 1733{
3e4f6290 1734 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1735 struct nfs_setattrargs arg = {
3e4f6290 1736 .fh = NFS_FH(inode),
1da177e4
LT		 1737 .iap = sattr,
1738 .server = server,
1739 .bitmask = server->attr_bitmask,
1740 };
1741 struct nfs_setattrres res = {
1742 .fattr = fattr,
1743 .server = server,
1744 };
1745 struct rpc_message msg = {
659bfcd6
TM		 1746 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1747 .rpc_argp = &arg,
1748 .rpc_resp = &res,
1749 .rpc_cred = cred,
1da177e4 1750 };
26e976a8 1751 unsigned long timestamp = jiffies;
65e4308d 1752 int status;
1da177e4 1753
0e574af1 1754 nfs_fattr_init(fattr);
1da177e4 1755
3e4f6290
TM		 1756 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1757 /* Use that stateid */
1758 } else if (state != NULL) {
08e9eac4
TM		 1759 nfs4_copy_stateid(&arg.stateid, state, current->files);
1760 } else
1da177e4
LT		 1761 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1762
cccef3b9 1763 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1764 if (status == 0 && state != NULL)
1765 renew_lease(server, timestamp);
65e4308d 1766 return status;
1da177e4
LT		 1767}
1768
659bfcd6
TM		 1769static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1770 struct nfs_fattr *fattr, struct iattr *sattr,
1771 struct nfs4_state *state)
1da177e4 1772{
3e4f6290 1773 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1774 struct nfs4_exception exception = { };
1775 int err;
1776 do {
1777 err = nfs4_handle_exception(server,
659bfcd6 1778 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1779 &exception);
1780 } while (exception.retry);
1781 return err;
1782}
1783
1784struct nfs4_closedata {
4a35bd41 1785 struct path path;
1da177e4
LT		 1786 struct inode *inode;
1787 struct nfs4_state *state;
1788 struct nfs_closeargs arg;
1789 struct nfs_closeres res;
516a6af6 1790 struct nfs_fattr fattr;
26e976a8 1791 unsigned long timestamp;
1da177e4
LT		 1792};
1793
963d8fe5 1794static void nfs4_free_closedata(void *data)
9512135d 1795{
963d8fe5
TM		 1796 struct nfs4_closedata *calldata = data;
1797 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1798
1799 nfs4_put_open_state(calldata->state);
1800 nfs_free_seqid(calldata->arg.seqid);
9512135d 1801 nfs4_put_state_owner(sp);
31f31db1 1802 path_put(&calldata->path);
9512135d
TM		 1803 kfree(calldata);
1804}
1805
88069f77
TM		 1806static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1807 fmode_t fmode)
1808{
1809 spin_lock(&state->owner->so_lock);
1810 if (!(fmode & FMODE_READ))
1811 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1812 if (!(fmode & FMODE_WRITE))
1813 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1814 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1815 spin_unlock(&state->owner->so_lock);
1816}
1817
963d8fe5 1818static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1819{
963d8fe5 1820 struct nfs4_closedata *calldata = data;
1da177e4 1821 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1822 struct nfs_server *server = NFS_SERVER(calldata->inode);
1823
19ddab06 1824 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1825 if (RPC_ASSASSINATED(task))
1826 return;
1da177e4
LT		 1827 /* hmm. we are done with the inode, and in the process of freeing
1828 * the state_owner. we keep this around to process errors
1829 */
1da177e4
LT		 1830 switch (task->tk_status) {
1831 case 0:
45328c35 1832 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1833 renew_lease(server, calldata->timestamp);
88069f77
TM		 1834 nfs4_close_clear_stateid_flags(state,
1835 calldata->arg.fmode);
1da177e4
LT		 1836 break;
1837 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1838 case -NFS4ERR_OLD_STATEID:
1839 case -NFS4ERR_BAD_STATEID:
1da177e4 1840 case -NFS4ERR_EXPIRED:
dc0b027d 1841 if (calldata->arg.fmode == 0)
9e33bed5 1842 break;
1da177e4 1843 default:
72211dbe
TM		 1844 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1845 rpc_restart_call_prepare(task);
1da177e4 1846 }
72211dbe 1847 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1848 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1849}
1850
4ce70ada 1851static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1852{
4ce70ada 1853 struct nfs4_closedata *calldata = data;
9512135d 1854 struct nfs4_state *state = calldata->state;
88069f77 1855 int call_close = 0;
9512135d 1856
963d8fe5 1857 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1858 return;
003707c7 1859
88069f77
TM		 1860 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1861 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1862 spin_lock(&state->owner->so_lock);
003707c7 1863 /* Calculate the change in open mode */
e7616923 1864 if (state->n_rdwr == 0) {
003707c7 1865 if (state->n_rdonly == 0) {
88069f77
TM		 1866 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1867 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1868 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1869 }
1870 if (state->n_wronly == 0) {
88069f77
TM		 1871 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1872 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1873 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1874 }
e7616923 1875 }
4cecb76f 1876 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1877
1878 if (!call_close) {
963d8fe5
TM		 1879 /* Note: exit _without_ calling nfs4_close_done */
1880 task->tk_action = NULL;
9512135d
TM		 1881 return;
1882 }
88069f77
TM		 1883
1884 if (calldata->arg.fmode == 0)
1885 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1886
516a6af6 1887 nfs_fattr_init(calldata->res.fattr);
26e976a8 1888 calldata->timestamp = jiffies;
19ddab06
AA		 1889 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1890 &calldata->arg.seq_args, &calldata->res.seq_res,
1891 1, task))
1892 return;
5138fde0 1893 rpc_call_start(task);
1da177e4
LT		 1894}
1895
963d8fe5 1896static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1897 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1898 .rpc_call_done = nfs4_close_done,
1899 .rpc_release = nfs4_free_closedata,
1900};
1901
1da177e4
LT		 1902/*
1903 * It is possible for data to be read/written from a mem-mapped file
1904 * after the sys_close call (which hits the vfs layer as a flush).
1905 * This means that we can't safely call nfsv4 close on a file until
1906 * the inode is cleared. This in turn means that we are not good
1907 * NFSv4 citizens - we do not indicate to the server to update the file's
1908 * share state even when we are done with one of the three share
1909 * stateid's in the inode.
1910 *
1911 * NOTE: Caller must be holding the sp->so_owner semaphore!
1912 */
a49c3c77 1913int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1914{
4a35bd41 1915 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1916 struct nfs4_closedata *calldata;
b39e625b
TM		 1917 struct nfs4_state_owner *sp = state->owner;
1918 struct rpc_task *task;
5138fde0
TM		 1919 struct rpc_message msg = {
1920 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1921 .rpc_cred = state->owner->so_cred,
1922 };
c970aa85
TM		 1923 struct rpc_task_setup task_setup_data = {
1924 .rpc_client = server->client,
5138fde0 1925 .rpc_message = &msg,
c970aa85 1926 .callback_ops = &nfs4_close_ops,
101070ca 1927 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1928 .flags = RPC_TASK_ASYNC,
1929 };
9512135d 1930 int status = -ENOMEM;
1da177e4 1931
19ddab06 1932 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1933 if (calldata == NULL)
9512135d 1934 goto out;
4a35bd41 1935 calldata->inode = state->inode;
1da177e4 1936 calldata->state = state;
4a35bd41 1937 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1938 calldata->arg.stateid = &state->open_stateid;
1da177e4 1939 /* Serialization for the sequence id */
cee54fc9 1940 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1941 if (calldata->arg.seqid == NULL)
1942 goto out_free_calldata;
dc0b027d 1943 calldata->arg.fmode = 0;
a65318bf 1944 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1945 calldata->res.fattr = &calldata->fattr;
c1d51931 1946 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1947 calldata->res.server = server;
5f7dbd5c 1948 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1949 calldata->path.mnt = mntget(path->mnt);
1950 calldata->path.dentry = dget(path->dentry);
9512135d 1951
5138fde0
TM		 1952 msg.rpc_argp = &calldata->arg,
1953 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1954 task_setup_data.callback_data = calldata;
1955 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1956 if (IS_ERR(task))
1957 return PTR_ERR(task);
a49c3c77
TM		 1958 status = 0;
1959 if (wait)
1960 status = rpc_wait_for_completion_task(task);
b39e625b 1961 rpc_put_task(task);
a49c3c77 1962 return status;
9512135d
TM		 1963out_free_calldata:
1964 kfree(calldata);
1965out:
b39e625b
TM		 1966 nfs4_put_open_state(state);
1967 nfs4_put_state_owner(sp);
9512135d 1968 return status;
1da177e4
LT		 1969}
1970
dc0b027d 1971static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1972{
1973 struct file *filp;
1b45c46c 1974 int ret;
02a913a7 1975
1b45c46c 1976 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1977 if (fmode & FMODE_EXEC) {
af22f94a 1978 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1979 state->owner->so_cred,
1980 nd->intent.open.flags);
1981 if (ret < 0)
1982 goto out_close;
1983 }
4a35bd41 1984 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1985 if (!IS_ERR(filp)) {
1986 struct nfs_open_context *ctx;
cd3758e3 1987 ctx = nfs_file_open_context(filp);
02a913a7 1988 ctx->state = state;
95cf959b
TM		 1989 return 0;
1990 }
1b45c46c
TM		 1991 ret = PTR_ERR(filp);
1992out_close:
dc0b027d 1993 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1994 return ret;
02a913a7
TM		 1995}
1996
1997struct dentry *
1da177e4
LT		 1998nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1999{
ad389da7 2000 struct path path = {
4ac91378 2001 .mnt = nd->path.mnt,
ad389da7
TM		 2002 .dentry = dentry,
2003 };
4ac91378 2004 struct dentry *parent;
1da177e4
LT		 2005 struct iattr attr;
2006 struct rpc_cred *cred;
2007 struct nfs4_state *state;
02a913a7 2008 struct dentry *res;
dc0b027d 2009 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2010
2011 if (nd->flags & LOOKUP_CREATE) {
2012 attr.ia_mode = nd->intent.open.create_mode;
2013 attr.ia_valid = ATTR_MODE;
2014 if (!IS_POSIXACL(dir))
ce3b0f8d 2015 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2016 } else {
2017 attr.ia_valid = 0;
2018 BUG_ON(nd->intent.open.flags & O_CREAT);
2019 }
2020
98a8e323 2021 cred = rpc_lookup_cred();
1da177e4 2022 if (IS_ERR(cred))
02a913a7 2023 return (struct dentry *)cred;
565277f6
TM		 2024 parent = dentry->d_parent;
2025 /* Protect against concurrent sillydeletes */
2026 nfs_block_sillyrename(parent);
dc0b027d 2027 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2028 put_rpccred(cred);
02a913a7 2029 if (IS_ERR(state)) {
d75340cc 2030 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2031 d_add(dentry, NULL);
d75340cc
TM		 2032 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2033 }
565277f6 2034 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2035 return (struct dentry *)state;
2036 }
24ac23ab 2037 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2038 if (res != NULL)
deee9369 2039 path.dentry = res;
d75340cc 2040 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2041 nfs_unblock_sillyrename(parent);
dc0b027d 2042 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2043 return res;
1da177e4
LT		 2044}
2045
2046int
02a913a7 2047nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2048{
ad389da7 2049 struct path path = {
4ac91378 2050 .mnt = nd->path.mnt,
ad389da7
TM		 2051 .dentry = dentry,
2052 };
1da177e4
LT		 2053 struct rpc_cred *cred;
2054 struct nfs4_state *state;
dc0b027d 2055 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2056
98a8e323 2057 cred = rpc_lookup_cred();
1da177e4
LT		 2058 if (IS_ERR(cred))
2059 return PTR_ERR(cred);
dc0b027d 2060 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2061 put_rpccred(cred);
02a913a7
TM		 2062 if (IS_ERR(state)) {
2063 switch (PTR_ERR(state)) {
2064 case -EPERM:
2065 case -EACCES:
2066 case -EDQUOT:
2067 case -ENOSPC:
2068 case -EROFS:
2069 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
2070 return 1;
b87c0adf
CL		 2071 default:
2072 goto out_drop;
02a913a7 2073 }
02a913a7 2074 }
24ac23ab 2075 if (state->inode == dentry->d_inode) {
d75340cc 2076 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2077 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2078 return 1;
2079 }
dc0b027d 2080 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2081out_drop:
2082 d_drop(dentry);
1da177e4
LT		 2083 return 0;
2084}
2085
1185a552 2086static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2087{
2088 if (ctx->state == NULL)
2089 return;
2090 if (is_sync)
2091 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2092 else
2093 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2094}
1da177e4
LT		 2095
2096static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2097{
43652ad5
BH		 2098 struct nfs4_server_caps_arg args = {
2099 .fhandle = fhandle,
2100 };
1da177e4
LT		 2101 struct nfs4_server_caps_res res = {};
2102 struct rpc_message msg = {
2103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2104 .rpc_argp = &args,
1da177e4
LT		 2105 .rpc_resp = &res,
2106 };
2107 int status;
2108
cccef3b9 2109 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2110 if (status == 0) {
2111 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2112 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2113 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2114 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2115 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2116 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2117 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2118 server->caps |= NFS_CAP_ACLS;
2119 if (res.has_links != 0)
2120 server->caps |= NFS_CAP_HARDLINKS;
2121 if (res.has_symlinks != 0)
2122 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2123 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2124 server->caps |= NFS_CAP_FILEID;
2125 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2126 server->caps |= NFS_CAP_MODE;
2127 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2128 server->caps |= NFS_CAP_NLINK;
2129 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2130 server->caps |= NFS_CAP_OWNER;
2131 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2132 server->caps |= NFS_CAP_OWNER_GROUP;
2133 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2134 server->caps |= NFS_CAP_ATIME;
2135 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2136 server->caps |= NFS_CAP_CTIME;
2137 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2138 server->caps |= NFS_CAP_MTIME;
2139
a65318bf
TM		 2140 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2141 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2142 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2143 server->acl_bitmask = res.acl_bitmask;
2144 }
cccef3b9 2145
1da177e4
LT		 2146 return status;
2147}
2148
55a97593 2149int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2150{
2151 struct nfs4_exception exception = { };
2152 int err;
2153 do {
2154 err = nfs4_handle_exception(server,
2155 _nfs4_server_capabilities(server, fhandle),
2156 &exception);
2157 } while (exception.retry);
2158 return err;
2159}
2160
2161static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2162 struct nfs_fsinfo *info)
2163{
1da177e4
LT		 2164 struct nfs4_lookup_root_arg args = {
2165 .bitmask = nfs4_fattr_bitmap,
2166 };
2167 struct nfs4_lookup_res res = {
2168 .server = server,
0e574af1 2169 .fattr = info->fattr,
1da177e4
LT		 2170 .fh = fhandle,
2171 };
2172 struct rpc_message msg = {
2173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2174 .rpc_argp = &args,
2175 .rpc_resp = &res,
2176 };
008f55d0 2177
0e574af1 2178 nfs_fattr_init(info->fattr);
fccba804 2179 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2180}
2181
2182static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2183 struct nfs_fsinfo *info)
2184{
2185 struct nfs4_exception exception = { };
2186 int err;
2187 do {
2188 err = nfs4_handle_exception(server,
2189 _nfs4_lookup_root(server, fhandle, info),
2190 &exception);
2191 } while (exception.retry);
2192 return err;
2193}
2194
54ceac45
DH		 2195/*
2196 * get the file handle for the "/" directory on the server
2197 */
1da177e4 2198static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2199 struct nfs_fsinfo *info)
1da177e4 2200{
1da177e4
LT		 2201 int status;
2202
1da177e4 2203 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2204 if (status == 0)
2205 status = nfs4_server_capabilities(server, fhandle);
2206 if (status == 0)
2207 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2208 return nfs4_map_errors(status);
1da177e4
LT		 2209}
2210
6b97fd3d
MN		 2211/*
2212 * Get locations and (maybe) other attributes of a referral.
2213 * Note that we'll actually follow the referral later when
2214 * we detect fsid mismatch in inode revalidation
2215 */
56659e99 2216static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2217{
2218 int status = -ENOMEM;
2219 struct page *page = NULL;
2220 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2221
2222 page = alloc_page(GFP_KERNEL);
2223 if (page == NULL)
2224 goto out;
2225 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2226 if (locations == NULL)
2227 goto out;
2228
c228fd3a 2229 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2230 if (status != 0)
2231 goto out;
2232 /* Make sure server returned a different fsid for the referral */
2233 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2234 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2235 status = -EIO;
2236 goto out;
2237 }
2238
2239 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2240 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2241 if (!fattr->mode)
2242 fattr->mode = S_IFDIR;
2243 memset(fhandle, 0, sizeof(struct nfs_fh));
2244out:
2245 if (page)
2246 __free_page(page);
2247 if (locations)
2248 kfree(locations);
2249 return status;
2250}
2251
1da177e4
LT		 2252static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2253{
2254 struct nfs4_getattr_arg args = {
2255 .fh = fhandle,
2256 .bitmask = server->attr_bitmask,
2257 };
2258 struct nfs4_getattr_res res = {
2259 .fattr = fattr,
2260 .server = server,
2261 };
2262 struct rpc_message msg = {
2263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2264 .rpc_argp = &args,
2265 .rpc_resp = &res,
2266 };
2267
0e574af1 2268 nfs_fattr_init(fattr);
cccef3b9 2269 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2270}
2271
2272static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2273{
2274 struct nfs4_exception exception = { };
2275 int err;
2276 do {
2277 err = nfs4_handle_exception(server,
2278 _nfs4_proc_getattr(server, fhandle, fattr),
2279 &exception);
2280 } while (exception.retry);
2281 return err;
2282}
2283
2284/*
2285 * The file is not closed if it is opened due to the a request to change
2286 * the size of the file. The open call will not be needed once the
2287 * VFS layer lookup-intents are implemented.
2288 *
2289 * Close is called when the inode is destroyed.
2290 * If we haven't opened the file for O_WRONLY, we
2291 * need to in the size_change case to obtain a stateid.
2292 *
2293 * Got race?
2294 * Because OPEN is always done by name in nfsv4, it is
2295 * possible that we opened a different file by the same
2296 * name. We can recognize this race condition, but we
2297 * can't do anything about it besides returning an error.
2298 *
2299 * This will be fixed with VFS changes (lookup-intent).
2300 */
2301static int
2302nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2303 struct iattr *sattr)
2304{
08e9eac4 2305 struct inode *inode = dentry->d_inode;
659bfcd6 2306 struct rpc_cred *cred = NULL;
d530838b 2307 struct nfs4_state *state = NULL;
1da177e4
LT		 2308 int status;
2309
0e574af1 2310 nfs_fattr_init(fattr);
1da177e4 2311
d530838b 2312 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2313 if (sattr->ia_valid & ATTR_FILE) {
2314 struct nfs_open_context *ctx;
2315
2316 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2317 if (ctx) {
2318 cred = ctx->cred;
2319 state = ctx->state;
2320 }
659bfcd6 2321 }
08e9eac4 2322
659bfcd6 2323 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2324 if (status == 0)
2325 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2326 return status;
2327}
2328
56659e99
TM		 2329static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2330 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2331 struct nfs_fattr *fattr)
2332{
2333 int status;
2334 struct nfs4_lookup_arg args = {
2335 .bitmask = server->attr_bitmask,
2336 .dir_fh = dirfh,
2337 .name = name,
2338 };
2339 struct nfs4_lookup_res res = {
2340 .server = server,
2341 .fattr = fattr,
2342 .fh = fhandle,
2343 };
2344 struct rpc_message msg = {
2345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2346 .rpc_argp = &args,
2347 .rpc_resp = &res,
2348 };
2349
2350 nfs_fattr_init(fattr);
2351
2352 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2353 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2354 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2355 return status;
2356}
2357
2358static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2359 struct qstr *name, struct nfs_fh *fhandle,
2360 struct nfs_fattr *fattr)
2361{
2362 struct nfs4_exception exception = { };
2363 int err;
2364 do {
4e56e082
TM		 2365 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2366 /* FIXME: !!!! */
2367 if (err == -NFS4ERR_MOVED) {
2368 err = -EREMOTE;
2369 break;
2370 }
2371 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2372 } while (exception.retry);
2373 return err;
2374}
2375
56659e99 2376static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2377 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2378{
4e56e082 2379 int status;
1da177e4
LT		 2380
2381 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2382 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2383 if (status == -NFS4ERR_MOVED)
2384 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2385 dprintk("NFS reply lookup: %d\n", status);
2386 return status;
2387}
2388
2389static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2390{
2391 struct nfs4_exception exception = { };
2392 int err;
2393 do {
2394 err = nfs4_handle_exception(NFS_SERVER(dir),
2395 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2396 &exception);
2397 } while (exception.retry);
2398 return err;
2399}
2400
2401static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2402{
76b32999
TM		 2403 struct nfs_server *server = NFS_SERVER(inode);
2404 struct nfs_fattr fattr;
1da177e4
LT		 2405 struct nfs4_accessargs args = {
2406 .fh = NFS_FH(inode),
76b32999
TM		 2407 .bitmask = server->attr_bitmask,
2408 };
2409 struct nfs4_accessres res = {
2410 .server = server,
2411 .fattr = &fattr,
1da177e4 2412 };
1da177e4
LT		 2413 struct rpc_message msg = {
2414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2415 .rpc_argp = &args,
2416 .rpc_resp = &res,
2417 .rpc_cred = entry->cred,
2418 };
2419 int mode = entry->mask;
2420 int status;
2421
2422 /*
2423 * Determine which access bits we want to ask for...
2424 */
2425 if (mode & MAY_READ)
2426 args.access |= NFS4_ACCESS_READ;
2427 if (S_ISDIR(inode->i_mode)) {
2428 if (mode & MAY_WRITE)
2429 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2430 if (mode & MAY_EXEC)
2431 args.access |= NFS4_ACCESS_LOOKUP;
2432 } else {
2433 if (mode & MAY_WRITE)
2434 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2435 if (mode & MAY_EXEC)
2436 args.access |= NFS4_ACCESS_EXECUTE;
2437 }
76b32999 2438 nfs_fattr_init(&fattr);
cccef3b9 2439 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2440 if (!status) {
2441 entry->mask = 0;
2442 if (res.access & NFS4_ACCESS_READ)
2443 entry->mask |= MAY_READ;
2444 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2445 entry->mask |= MAY_WRITE;
2446 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2447 entry->mask |= MAY_EXEC;
76b32999 2448 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2449 }
2450 return status;
2451}
2452
2453static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2454{
2455 struct nfs4_exception exception = { };
2456 int err;
2457 do {
2458 err = nfs4_handle_exception(NFS_SERVER(inode),
2459 _nfs4_proc_access(inode, entry),
2460 &exception);
2461 } while (exception.retry);
2462 return err;
2463}
2464
2465/*
2466 * TODO: For the time being, we don't try to get any attributes
2467 * along with any of the zero-copy operations READ, READDIR,
2468 * READLINK, WRITE.
2469 *
2470 * In the case of the first three, we want to put the GETATTR
2471 * after the read-type operation -- this is because it is hard
2472 * to predict the length of a GETATTR response in v4, and thus
2473 * align the READ data correctly. This means that the GETATTR
2474 * may end up partially falling into the page cache, and we should
2475 * shift it into the 'tail' of the xdr_buf before processing.
2476 * To do this efficiently, we need to know the total length
2477 * of data received, which doesn't seem to be available outside
2478 * of the RPC layer.
2479 *
2480 * In the case of WRITE, we also want to put the GETATTR after
2481 * the operation -- in this case because we want to make sure
2482 * we get the post-operation mtime and size. This means that
2483 * we can't use xdr_encode_pages() as written: we need a variant
2484 * of it which would leave room in the 'tail' iovec.
2485 *
2486 * Both of these changes to the XDR layer would in fact be quite
2487 * minor, but I decided to leave them for a subsequent patch.
2488 */
2489static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2490 unsigned int pgbase, unsigned int pglen)
2491{
2492 struct nfs4_readlink args = {
2493 .fh = NFS_FH(inode),
2494 .pgbase = pgbase,
2495 .pglen = pglen,
2496 .pages = &page,
2497 };
f50c7000 2498 struct nfs4_readlink_res res;
1da177e4
LT		 2499 struct rpc_message msg = {
2500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2501 .rpc_argp = &args,
f50c7000 2502 .rpc_resp = &res,
1da177e4
LT		 2503 };
2504
cccef3b9 2505 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2506}
2507
2508static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2509 unsigned int pgbase, unsigned int pglen)
2510{
2511 struct nfs4_exception exception = { };
2512 int err;
2513 do {
2514 err = nfs4_handle_exception(NFS_SERVER(inode),
2515 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2516 &exception);
2517 } while (exception.retry);
2518 return err;
2519}
2520
1da177e4
LT		 2521/*
2522 * Got race?
2523 * We will need to arrange for the VFS layer to provide an atomic open.
2524 * Until then, this create/open method is prone to inefficiency and race
2525 * conditions due to the lookup, create, and open VFS calls from sys_open()
2526 * placed on the wire.
2527 *
2528 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2529 * The file will be opened again in the subsequent VFS open call
2530 * (nfs4_proc_file_open).
2531 *
2532 * The open for read will just hang around to be used by any process that
2533 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2534 */
2535
2536static int
2537nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2538 int flags, struct nameidata *nd)
1da177e4 2539{
ad389da7 2540 struct path path = {
4ac91378 2541 .mnt = nd->path.mnt,
ad389da7
TM		 2542 .dentry = dentry,
2543 };
1da177e4
LT		 2544 struct nfs4_state *state;
2545 struct rpc_cred *cred;
dc0b027d 2546 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2547 int status = 0;
2548
98a8e323 2549 cred = rpc_lookup_cred();
1da177e4
LT		 2550 if (IS_ERR(cred)) {
2551 status = PTR_ERR(cred);
2552 goto out;
2553 }
dc0b027d 2554 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2555 d_drop(dentry);
1da177e4
LT		 2556 if (IS_ERR(state)) {
2557 status = PTR_ERR(state);
659bfcd6 2558 goto out_putcred;
1da177e4 2559 }
d4d9cdcb 2560 d_add(dentry, igrab(state->inode));
d75340cc 2561 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2562 if (flags & O_EXCL) {
2563 struct nfs_fattr fattr;
659bfcd6 2564 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2565 if (status == 0)
65e4308d 2566 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2567 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2568 }
ad389da7 2569 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2570 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2571 else
dc0b027d 2572 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2573out_putcred:
2574 put_rpccred(cred);
1da177e4
LT		 2575out:
2576 return status;
2577}
2578
2579static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2580{
16e42959 2581 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2582 struct nfs_removeargs args = {
1da177e4 2583 .fh = NFS_FH(dir),
4fdc17b2
TM		 2584 .name.len = name->len,
2585 .name.name = name->name,
16e42959
TM		 2586 .bitmask = server->attr_bitmask,
2587 };
4fdc17b2 2588 struct nfs_removeres res = {
16e42959 2589 .server = server,
1da177e4 2590 };
1da177e4 2591 struct rpc_message msg = {
4fdc17b2
TM		 2592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2593 .rpc_argp = &args,
2594 .rpc_resp = &res,
1da177e4
LT		 2595 };
2596 int status;
2597
4fdc17b2 2598 nfs_fattr_init(&res.dir_attr);
cccef3b9 2599 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2600 if (status == 0) {
2601 update_changeattr(dir, &res.cinfo);
4fdc17b2 2602 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2603 }
1da177e4
LT		 2604 return status;
2605}
2606
2607static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2608{
2609 struct nfs4_exception exception = { };
2610 int err;
2611 do {
2612 err = nfs4_handle_exception(NFS_SERVER(dir),
2613 _nfs4_proc_remove(dir, name),
2614 &exception);
2615 } while (exception.retry);
2616 return err;
2617}
2618
e4eff1a6 2619static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2620{
e4eff1a6
TM		 2621 struct nfs_server *server = NFS_SERVER(dir);
2622 struct nfs_removeargs *args = msg->rpc_argp;
2623 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2624
a65318bf 2625 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2626 res->server = server;
1da177e4 2627 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2628}
2629
e4eff1a6 2630static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2631{
e4eff1a6
TM		 2632 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2633
472cfbd9 2634 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2635 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2636 return 0;
2637 update_changeattr(dir, &res->cinfo);
2638 nfs_post_op_update_inode(dir, &res->dir_attr);
2639 return 1;
1da177e4
LT		 2640}
2641
2642static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2643 struct inode *new_dir, struct qstr *new_name)
2644{
6caf2c82 2645 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2646 struct nfs4_rename_arg arg = {
2647 .old_dir = NFS_FH(old_dir),
2648 .new_dir = NFS_FH(new_dir),
2649 .old_name = old_name,
2650 .new_name = new_name,
6caf2c82
TM		 2651 .bitmask = server->attr_bitmask,
2652 };
2653 struct nfs_fattr old_fattr, new_fattr;
2654 struct nfs4_rename_res res = {
2655 .server = server,
2656 .old_fattr = &old_fattr,
2657 .new_fattr = &new_fattr,
1da177e4 2658 };
1da177e4
LT		 2659 struct rpc_message msg = {
2660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2661 .rpc_argp = &arg,
2662 .rpc_resp = &res,
2663 };
2664 int status;
2665
6caf2c82
TM		 2666 nfs_fattr_init(res.old_fattr);
2667 nfs_fattr_init(res.new_fattr);
cccef3b9 2668 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2669
2670 if (!status) {
2671 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2672 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2673 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2674 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2675 }
2676 return status;
2677}
2678
2679static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2680 struct inode *new_dir, struct qstr *new_name)
2681{
2682 struct nfs4_exception exception = { };
2683 int err;
2684 do {
2685 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2686 _nfs4_proc_rename(old_dir, old_name,
2687 new_dir, new_name),
2688 &exception);
2689 } while (exception.retry);
2690 return err;
2691}
2692
2693static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2694{
91ba2eee 2695 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2696 struct nfs4_link_arg arg = {
2697 .fh = NFS_FH(inode),
2698 .dir_fh = NFS_FH(dir),
2699 .name = name,
91ba2eee
TM		 2700 .bitmask = server->attr_bitmask,
2701 };
2702 struct nfs_fattr fattr, dir_attr;
2703 struct nfs4_link_res res = {
2704 .server = server,
2705 .fattr = &fattr,
2706 .dir_attr = &dir_attr,
1da177e4 2707 };
1da177e4
LT		 2708 struct rpc_message msg = {
2709 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2710 .rpc_argp = &arg,
91ba2eee 2711 .rpc_resp = &res,
1da177e4
LT		 2712 };
2713 int status;
2714
91ba2eee
TM		 2715 nfs_fattr_init(res.fattr);
2716 nfs_fattr_init(res.dir_attr);
cccef3b9 2717 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2718 if (!status) {
2719 update_changeattr(dir, &res.cinfo);
2720 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2721 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2722 }
1da177e4
LT		 2723
2724 return status;
2725}
2726
2727static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2728{
2729 struct nfs4_exception exception = { };
2730 int err;
2731 do {
2732 err = nfs4_handle_exception(NFS_SERVER(inode),
2733 _nfs4_proc_link(inode, dir, name),
2734 &exception);
2735 } while (exception.retry);
2736 return err;
2737}
2738
57dc9a57
TM		 2739struct nfs4_createdata {
2740 struct rpc_message msg;
2741 struct nfs4_create_arg arg;
2742 struct nfs4_create_res res;
2743 struct nfs_fh fh;
2744 struct nfs_fattr fattr;
2745 struct nfs_fattr dir_fattr;
2746};
2747
2748static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2749 struct qstr *name, struct iattr *sattr, u32 ftype)
2750{
2751 struct nfs4_createdata *data;
2752
2753 data = kzalloc(sizeof(*data), GFP_KERNEL);
2754 if (data != NULL) {
2755 struct nfs_server *server = NFS_SERVER(dir);
2756
2757 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2758 data->msg.rpc_argp = &data->arg;
2759 data->msg.rpc_resp = &data->res;
2760 data->arg.dir_fh = NFS_FH(dir);
2761 data->arg.server = server;
2762 data->arg.name = name;
2763 data->arg.attrs = sattr;
2764 data->arg.ftype = ftype;
2765 data->arg.bitmask = server->attr_bitmask;
2766 data->res.server = server;
2767 data->res.fh = &data->fh;
2768 data->res.fattr = &data->fattr;
2769 data->res.dir_fattr = &data->dir_fattr;
2770 nfs_fattr_init(data->res.fattr);
2771 nfs_fattr_init(data->res.dir_fattr);
2772 }
2773 return data;
2774}
2775
2776static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2777{
cccef3b9
AA		 2778 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2779 &data->arg, &data->res, 1);
57dc9a57
TM		 2780 if (status == 0) {
2781 update_changeattr(dir, &data->res.dir_cinfo);
2782 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2783 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2784 }
2785 return status;
2786}
2787
2788static void nfs4_free_createdata(struct nfs4_createdata *data)
2789{
2790 kfree(data);
2791}
2792
4f390c15 2793static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2794 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2795{
57dc9a57
TM		 2796 struct nfs4_createdata *data;
2797 int status = -ENAMETOOLONG;
1da177e4 2798
94a6d753 2799 if (len > NFS4_MAXPATHLEN)
57dc9a57 2800 goto out;
4f390c15 2801
57dc9a57
TM		 2802 status = -ENOMEM;
2803 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2804 if (data == NULL)
2805 goto out;
2806
2807 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2808 data->arg.u.symlink.pages = &page;
2809 data->arg.u.symlink.len = len;
1da177e4 2810
57dc9a57
TM		 2811 status = nfs4_do_create(dir, dentry, data);
2812
2813 nfs4_free_createdata(data);
2814out:
1da177e4
LT		 2815 return status;
2816}
2817
4f390c15 2818static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2819 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2820{
2821 struct nfs4_exception exception = { };
2822 int err;
2823 do {
2824 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2825 _nfs4_proc_symlink(dir, dentry, page,
2826 len, sattr),
1da177e4
LT		 2827 &exception);
2828 } while (exception.retry);
2829 return err;
2830}
2831
2832static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2833 struct iattr *sattr)
2834{
57dc9a57
TM		 2835 struct nfs4_createdata *data;
2836 int status = -ENOMEM;
1da177e4 2837
57dc9a57
TM		 2838 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2839 if (data == NULL)
2840 goto out;
2841
2842 status = nfs4_do_create(dir, dentry, data);
2843
2844 nfs4_free_createdata(data);
2845out:
1da177e4
LT		 2846 return status;
2847}
2848
2849static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2850 struct iattr *sattr)
2851{
2852 struct nfs4_exception exception = { };
2853 int err;
2854 do {
2855 err = nfs4_handle_exception(NFS_SERVER(dir),
2856 _nfs4_proc_mkdir(dir, dentry, sattr),
2857 &exception);
2858 } while (exception.retry);
2859 return err;
2860}
2861
2862static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2863 u64 cookie, struct page *page, unsigned int count, int plus)
2864{
2865 struct inode *dir = dentry->d_inode;
2866 struct nfs4_readdir_arg args = {
2867 .fh = NFS_FH(dir),
2868 .pages = &page,
2869 .pgbase = 0,
2870 .count = count,
96d25e53 2871 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2872 };
2873 struct nfs4_readdir_res res;
2874 struct rpc_message msg = {
2875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2876 .rpc_argp = &args,
2877 .rpc_resp = &res,
2878 .rpc_cred = cred,
2879 };
2880 int status;
2881
3110ff80 2882 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2883 dentry->d_parent->d_name.name,
2884 dentry->d_name.name,
2885 (unsigned long long)cookie);
1da177e4
LT		 2886 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2887 res.pgbase = args.pgbase;
cccef3b9 2888 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2889 if (status == 0)
2890 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2891
2892 nfs_invalidate_atime(dir);
2893
3110ff80 2894 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2895 return status;
2896}
2897
2898static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2899 u64 cookie, struct page *page, unsigned int count, int plus)
2900{
2901 struct nfs4_exception exception = { };
2902 int err;
2903 do {
2904 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2905 _nfs4_proc_readdir(dentry, cred, cookie,
2906 page, count, plus),
2907 &exception);
2908 } while (exception.retry);
2909 return err;
2910}
2911
2912static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2913 struct iattr *sattr, dev_t rdev)
2914{
57dc9a57
TM		 2915 struct nfs4_createdata *data;
2916 int mode = sattr->ia_mode;
2917 int status = -ENOMEM;
1da177e4
LT		 2918
2919 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2920 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2921
2922 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2923 if (data == NULL)
2924 goto out;
2925
1da177e4 2926 if (S_ISFIFO(mode))
57dc9a57 2927 data->arg.ftype = NF4FIFO;
1da177e4 2928 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2929 data->arg.ftype = NF4BLK;
2930 data->arg.u.device.specdata1 = MAJOR(rdev);
2931 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2932 }
2933 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2934 data->arg.ftype = NF4CHR;
2935 data->arg.u.device.specdata1 = MAJOR(rdev);
2936 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2937 }
1da177e4 2938
57dc9a57
TM		 2939 status = nfs4_do_create(dir, dentry, data);
2940
2941 nfs4_free_createdata(data);
2942out:
1da177e4
LT		 2943 return status;
2944}
2945
2946static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2947 struct iattr *sattr, dev_t rdev)
2948{
2949 struct nfs4_exception exception = { };
2950 int err;
2951 do {
2952 err = nfs4_handle_exception(NFS_SERVER(dir),
2953 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2954 &exception);
2955 } while (exception.retry);
2956 return err;
2957}
2958
2959static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2960 struct nfs_fsstat *fsstat)
2961{
2962 struct nfs4_statfs_arg args = {
2963 .fh = fhandle,
2964 .bitmask = server->attr_bitmask,
2965 };
24ad148a
BH		 2966 struct nfs4_statfs_res res = {
2967 .fsstat = fsstat,
2968 };
1da177e4
LT		 2969 struct rpc_message msg = {
2970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2971 .rpc_argp = &args,
24ad148a 2972 .rpc_resp = &res,
1da177e4
LT		 2973 };
2974
0e574af1 2975 nfs_fattr_init(fsstat->fattr);
cccef3b9 2976 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2977}
2978
2979static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2980{
2981 struct nfs4_exception exception = { };
2982 int err;
2983 do {
2984 err = nfs4_handle_exception(server,
2985 _nfs4_proc_statfs(server, fhandle, fsstat),
2986 &exception);
2987 } while (exception.retry);
2988 return err;
2989}
2990
2991static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2992 struct nfs_fsinfo *fsinfo)
2993{
2994 struct nfs4_fsinfo_arg args = {
2995 .fh = fhandle,
2996 .bitmask = server->attr_bitmask,
2997 };
3dda5e43
BH		 2998 struct nfs4_fsinfo_res res = {
2999 .fsinfo = fsinfo,
3000 };
1da177e4
LT		 3001 struct rpc_message msg = {
3002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3003 .rpc_argp = &args,
3dda5e43 3004 .rpc_resp = &res,
1da177e4
LT		 3005 };
3006
cccef3b9 3007 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3008}
3009
3010static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3011{
3012 struct nfs4_exception exception = { };
3013 int err;
3014
3015 do {
3016 err = nfs4_handle_exception(server,
3017 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3018 &exception);
3019 } while (exception.retry);
3020 return err;
3021}
3022
3023static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3024{
0e574af1 3025 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3026 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3027}
3028
3029static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3030 struct nfs_pathconf *pathconf)
3031{
3032 struct nfs4_pathconf_arg args = {
3033 .fh = fhandle,
3034 .bitmask = server->attr_bitmask,
3035 };
d45b2989
BH		 3036 struct nfs4_pathconf_res res = {
3037 .pathconf = pathconf,
3038 };
1da177e4
LT		 3039 struct rpc_message msg = {
3040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3041 .rpc_argp = &args,
d45b2989 3042 .rpc_resp = &res,
1da177e4
LT		 3043 };
3044
3045 /* None of the pathconf attributes are mandatory to implement */
3046 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3047 memset(pathconf, 0, sizeof(*pathconf));
3048 return 0;
3049 }
3050
0e574af1 3051 nfs_fattr_init(pathconf->fattr);
cccef3b9 3052 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3053}
3054
3055static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3056 struct nfs_pathconf *pathconf)
3057{
3058 struct nfs4_exception exception = { };
3059 int err;
3060
3061 do {
3062 err = nfs4_handle_exception(server,
3063 _nfs4_proc_pathconf(server, fhandle, pathconf),
3064 &exception);
3065 } while (exception.retry);
3066 return err;
3067}
3068
ec06c096 3069static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3070{
ec06c096 3071 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3072
f11c88af
AA		 3073 dprintk("--> %s\n", __func__);
3074
f11c88af
AA		 3075 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3076
9e33bed5 3077 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3078 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3079 return -EAGAIN;
1da177e4 3080 }
8850df99
TM		 3081
3082 nfs_invalidate_atime(data->inode);
1da177e4 3083 if (task->tk_status > 0)
ec06c096
TM		 3084 renew_lease(server, data->timestamp);
3085 return 0;
1da177e4
LT		 3086}
3087
bdc7f021 3088static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3089{
1da177e4 3090 data->timestamp = jiffies;
bdc7f021 3091 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3092}
3093
788e7a89 3094static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3095{
1da177e4
LT		 3096 struct inode *inode = data->inode;
3097
def6ed7e
AA		 3098 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3099 task->tk_status);
3100
9e33bed5 3101 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3102 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3103 return -EAGAIN;
1da177e4 3104 }
4f9838c7 3105 if (task->tk_status >= 0) {
1da177e4 3106 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3107 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3108 }
788e7a89 3109 return 0;
1da177e4
LT		 3110}
3111
bdc7f021 3112static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3113{
bdc7f021
TM		 3114 struct nfs_server *server = NFS_SERVER(data->inode);
3115
a65318bf 3116 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3117 data->res.server = server;
1da177e4
LT		 3118 data->timestamp = jiffies;
3119
bdc7f021 3120 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3121}
3122
788e7a89 3123static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3124{
1da177e4
LT		 3125 struct inode *inode = data->inode;
3126
21d9a851
AA		 3127 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3128 task->tk_status);
9e33bed5 3129 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3130 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3131 return -EAGAIN;
1da177e4 3132 }
9e08a3c5 3133 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3134 return 0;
1da177e4
LT		 3135}
3136
bdc7f021 3137static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3138{
788e7a89 3139 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3140
a65318bf 3141 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3142 data->res.server = server;
bdc7f021 3143 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3144}
3145
3146/*
3147 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3148 * standalone procedure for queueing an asynchronous RENEW.
3149 */
963d8fe5 3150static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3151{
adfa6f98 3152 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3153 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3154
3155 if (task->tk_status < 0) {
95baa25c
TM		 3156 /* Unless we're shutting down, schedule state recovery! */
3157 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3158 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3159 return;
3160 }
3161 spin_lock(&clp->cl_lock);
3162 if (time_before(clp->cl_last_renewal,timestamp))
3163 clp->cl_last_renewal = timestamp;
3164 spin_unlock(&clp->cl_lock);
3165}
3166
963d8fe5
TM		 3167static const struct rpc_call_ops nfs4_renew_ops = {
3168 .rpc_call_done = nfs4_renew_done,
3169};
3170
adfa6f98 3171int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3172{
3173 struct rpc_message msg = {
3174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3175 .rpc_argp = clp,
b4454fe1 3176 .rpc_cred = cred,
1da177e4
LT		 3177 };
3178
3179 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3180 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3181}
3182
adfa6f98 3183int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3184{
3185 struct rpc_message msg = {
3186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3187 .rpc_argp = clp,
b4454fe1 3188 .rpc_cred = cred,
1da177e4
LT		 3189 };
3190 unsigned long now = jiffies;
3191 int status;
3192
3193 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3194 if (status < 0)
3195 return status;
3196 spin_lock(&clp->cl_lock);
3197 if (time_before(clp->cl_last_renewal,now))
3198 clp->cl_last_renewal = now;
3199 spin_unlock(&clp->cl_lock);
3200 return 0;
3201}
3202
aa1870af
BF		 3203static inline int nfs4_server_supports_acls(struct nfs_server *server)
3204{
3205 return (server->caps & NFS_CAP_ACLS)
3206 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3207 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3208}
3209
3210/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3211 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3212 * the stack.
3213 */
3214#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3215
3216static void buf_to_pages(const void *buf, size_t buflen,
3217 struct page **pages, unsigned int *pgbase)
3218{
3219 const void *p = buf;
3220
3221 *pgbase = offset_in_page(buf);
3222 p -= *pgbase;
3223 while (p < buf + buflen) {
3224 *(pages++) = virt_to_page(p);
3225 p += PAGE_CACHE_SIZE;
3226 }
3227}
3228
e50a1c2e
BF		 3229struct nfs4_cached_acl {
3230 int cached;
3231 size_t len;
3e9d4154 3232 char data[0];
e50a1c2e
BF		 3233};
3234
3235static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3236{
3237 struct nfs_inode *nfsi = NFS_I(inode);
3238
3239 spin_lock(&inode->i_lock);
3240 kfree(nfsi->nfs4_acl);
3241 nfsi->nfs4_acl = acl;
3242 spin_unlock(&inode->i_lock);
3243}
3244
3245static void nfs4_zap_acl_attr(struct inode *inode)
3246{
3247 nfs4_set_cached_acl(inode, NULL);
3248}
3249
3250static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3251{
3252 struct nfs_inode *nfsi = NFS_I(inode);
3253 struct nfs4_cached_acl *acl;
3254 int ret = -ENOENT;
3255
3256 spin_lock(&inode->i_lock);
3257 acl = nfsi->nfs4_acl;
3258 if (acl == NULL)
3259 goto out;
3260 if (buf == NULL) /* user is just asking for length */
3261 goto out_len;
3262 if (acl->cached == 0)
3263 goto out;
3264 ret = -ERANGE; /* see getxattr(2) man page */
3265 if (acl->len > buflen)
3266 goto out;
3267 memcpy(buf, acl->data, acl->len);
3268out_len:
3269 ret = acl->len;
3270out:
3271 spin_unlock(&inode->i_lock);
3272 return ret;
3273}
3274
3275static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3276{
3277 struct nfs4_cached_acl *acl;
3278
3279 if (buf && acl_len <= PAGE_SIZE) {
3280 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3281 if (acl == NULL)
3282 goto out;
3283 acl->cached = 1;
3284 memcpy(acl->data, buf, acl_len);
3285 } else {
3286 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3287 if (acl == NULL)
3288 goto out;
3289 acl->cached = 0;
3290 }
3291 acl->len = acl_len;
3292out:
3293 nfs4_set_cached_acl(inode, acl);
3294}
3295
16b4289c 3296static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3297{
aa1870af
BF		 3298 struct page *pages[NFS4ACL_MAXPAGES];
3299 struct nfs_getaclargs args = {
3300 .fh = NFS_FH(inode),
3301 .acl_pages = pages,
3302 .acl_len = buflen,
3303 };
663c79b3
BH		 3304 struct nfs_getaclres res = {
3305 .acl_len = buflen,
3306 };
e50a1c2e 3307 void *resp_buf;
aa1870af
BF		 3308 struct rpc_message msg = {
3309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3310 .rpc_argp = &args,
663c79b3 3311 .rpc_resp = &res,
aa1870af 3312 };
e50a1c2e 3313 struct page *localpage = NULL;
aa1870af
BF		 3314 int ret;
3315
e50a1c2e
BF		 3316 if (buflen < PAGE_SIZE) {
3317 /* As long as we're doing a round trip to the server anyway,
3318 * let's be prepared for a page of acl data. */
3319 localpage = alloc_page(GFP_KERNEL);
3320 resp_buf = page_address(localpage);
3321 if (localpage == NULL)
3322 return -ENOMEM;
3323 args.acl_pages[0] = localpage;
3324 args.acl_pgbase = 0;
663c79b3 3325 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3326 } else {
3327 resp_buf = buf;
3328 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3329 }
cccef3b9 3330 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3331 if (ret)
3332 goto out_free;
663c79b3
BH		 3333 if (res.acl_len > args.acl_len)
3334 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3335 else
663c79b3 3336 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3337 if (buf) {
3338 ret = -ERANGE;
663c79b3 3339 if (res.acl_len > buflen)
e50a1c2e
BF		 3340 goto out_free;
3341 if (localpage)
663c79b3 3342 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3343 }
663c79b3 3344 ret = res.acl_len;
e50a1c2e
BF		 3345out_free:
3346 if (localpage)
3347 __free_page(localpage);
aa1870af
BF		 3348 return ret;
3349}
3350
16b4289c
TM		 3351static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3352{
3353 struct nfs4_exception exception = { };
3354 ssize_t ret;
3355 do {
3356 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3357 if (ret >= 0)
3358 break;
3359 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3360 } while (exception.retry);
3361 return ret;
3362}
3363
e50a1c2e
BF		 3364static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3365{
3366 struct nfs_server *server = NFS_SERVER(inode);
3367 int ret;
3368
3369 if (!nfs4_server_supports_acls(server))
3370 return -EOPNOTSUPP;
3371 ret = nfs_revalidate_inode(server, inode);
3372 if (ret < 0)
3373 return ret;
3374 ret = nfs4_read_cached_acl(inode, buf, buflen);
3375 if (ret != -ENOENT)
3376 return ret;
3377 return nfs4_get_acl_uncached(inode, buf, buflen);
3378}
3379
16b4289c 3380static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3381{
3382 struct nfs_server *server = NFS_SERVER(inode);
3383 struct page *pages[NFS4ACL_MAXPAGES];
3384 struct nfs_setaclargs arg = {
3385 .fh = NFS_FH(inode),
3386 .acl_pages = pages,
3387 .acl_len = buflen,
3388 };
73c403a9 3389 struct nfs_setaclres res;
4b580ee3
BF		 3390 struct rpc_message msg = {
3391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3392 .rpc_argp = &arg,
73c403a9 3393 .rpc_resp = &res,
4b580ee3
BF		 3394 };
3395 int ret;
3396
3397 if (!nfs4_server_supports_acls(server))
3398 return -EOPNOTSUPP;
642ac549 3399 nfs_inode_return_delegation(inode);
4b580ee3 3400 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3401 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3402 nfs_access_zap_cache(inode);
3403 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3404 return ret;
3405}
3406
16b4289c
TM		 3407static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3408{
3409 struct nfs4_exception exception = { };
3410 int err;
3411 do {
3412 err = nfs4_handle_exception(NFS_SERVER(inode),
3413 __nfs4_proc_set_acl(inode, buf, buflen),
3414 &exception);
3415 } while (exception.retry);
3416 return err;
3417}
3418
1da177e4 3419static int
8328d59f 3420_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3421{
1da177e4
LT		 3422 if (!clp || task->tk_status >= 0)
3423 return 0;
3424 switch(task->tk_status) {
9e33bed5
TM		 3425 case -NFS4ERR_ADMIN_REVOKED:
3426 case -NFS4ERR_BAD_STATEID:
3427 case -NFS4ERR_OPENMODE:
3428 if (state == NULL)
3429 break;
3430 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3431 goto do_state_recovery;
1da177e4 3432 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3433 if (state == NULL)
3434 break;
3435 nfs4_state_mark_reclaim_reboot(clp, state);
3436 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3437 case -NFS4ERR_EXPIRED:
a2c0b9e2 3438 goto do_state_recovery;
4745e315
AA		 3439#if defined(CONFIG_NFS_V4_1)
3440 case -NFS4ERR_BADSESSION:
3441 case -NFS4ERR_BADSLOT:
3442 case -NFS4ERR_BAD_HIGH_SLOT:
3443 case -NFS4ERR_DEADSESSION:
3444 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3445 case -NFS4ERR_SEQ_FALSE_RETRY:
3446 case -NFS4ERR_SEQ_MISORDERED:
3447 dprintk("%s ERROR %d, Reset session\n", __func__,
3448 task->tk_status);
0b9e2d41 3449 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3450 task->tk_status = 0;
3451 return -EAGAIN;
3452#endif /* CONFIG_NFS_V4_1 */
1da177e4 3453 case -NFS4ERR_DELAY:
8328d59f
AA		 3454 if (server)
3455 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3456 case -NFS4ERR_GRACE:
2c643488 3457 case -EKEYEXPIRED:
1da177e4
LT		 3458 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3459 task->tk_status = 0;
3460 return -EAGAIN;
3461 case -NFS4ERR_OLD_STATEID:
3462 task->tk_status = 0;
3463 return -EAGAIN;
3464 }
3465 task->tk_status = nfs4_map_errors(task->tk_status);
3466 return 0;
a2c0b9e2
TM		 3467do_state_recovery:
3468 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3469 nfs4_schedule_state_recovery(clp);
3470 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3471 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3472 task->tk_status = 0;
3473 return -EAGAIN;
1da177e4
LT		 3474}
3475
8328d59f
AA		 3476static int
3477nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3478{
3479 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3480}
3481
adfa6f98 3482int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3483{
3484 nfs4_verifier sc_verifier;
3485 struct nfs4_setclientid setclientid = {
3486 .sc_verifier = &sc_verifier,
3487 .sc_prog = program,
3488 };
3489 struct rpc_message msg = {
3490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3491 .rpc_argp = &setclientid,
3492 .rpc_resp = clp,
286d7d6a 3493 .rpc_cred = cred,
1da177e4 3494 };
bc4785cd 3495 __be32 *p;
1da177e4
LT		 3496 int loop = 0;
3497 int status;
3498
bc4785cd 3499 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3500 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3501 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3502
3503 for(;;) {
3504 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3505 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3506 clp->cl_ipaddr,
3507 rpc_peeraddr2str(clp->cl_rpcclient,
3508 RPC_DISPLAY_ADDR),
69dd716c
TM		 3509 rpc_peeraddr2str(clp->cl_rpcclient,
3510 RPC_DISPLAY_PROTO),
78ea323b 3511 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3512 clp->cl_id_uniquifier);
3513 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3514 sizeof(setclientid.sc_netid),
3515 rpc_peeraddr2str(clp->cl_rpcclient,
3516 RPC_DISPLAY_NETID));
1da177e4 3517 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3518 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3519 clp->cl_ipaddr, port >> 8, port & 255);
3520
3521 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3522 if (status != -NFS4ERR_CLID_INUSE)
3523 break;
3524 if (signalled())
3525 break;
3526 if (loop++ & 1)
3527 ssleep(clp->cl_lease_time + 1);
3528 else
3529 if (++clp->cl_id_uniquifier == 0)
3530 break;
3531 }
3532 return status;
3533}
3534
adfa6f98 3535static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3536{
3537 struct nfs_fsinfo fsinfo;
3538 struct rpc_message msg = {
3539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3540 .rpc_argp = clp,
3541 .rpc_resp = &fsinfo,
286d7d6a 3542 .rpc_cred = cred,
1da177e4
LT		 3543 };
3544 unsigned long now;
3545 int status;
3546
3547 now = jiffies;
3548 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3549 if (status == 0) {
3550 spin_lock(&clp->cl_lock);
3551 clp->cl_lease_time = fsinfo.lease_time * HZ;
3552 clp->cl_last_renewal = now;
3553 spin_unlock(&clp->cl_lock);
3554 }
3555 return status;
3556}
3557
adfa6f98 3558int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3559{
77e03677 3560 long timeout = 0;
51581f3b
TM		 3561 int err;
3562 do {
3563 err = _nfs4_proc_setclientid_confirm(clp, cred);
3564 switch (err) {
3565 case 0:
3566 return err;
3567 case -NFS4ERR_RESOURCE:
3568 /* The IBM lawyers misread another document! */
3569 case -NFS4ERR_DELAY:
2c643488 3570 case -EKEYEXPIRED:
51581f3b
TM		 3571 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3572 }
3573 } while (err == 0);
3574 return err;
3575}
3576
fe650407
TM		 3577struct nfs4_delegreturndata {
3578 struct nfs4_delegreturnargs args;
fa178f29 3579 struct nfs4_delegreturnres res;
fe650407
TM		 3580 struct nfs_fh fh;
3581 nfs4_stateid stateid;
26e976a8 3582 unsigned long timestamp;
fa178f29 3583 struct nfs_fattr fattr;
fe650407
TM		 3584 int rpc_status;
3585};
3586
fe650407
TM		 3587static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3588{
3589 struct nfs4_delegreturndata *data = calldata;
938e1010 3590
d61e612a
TM		 3591 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3592 task->tk_status);
938e1010 3593
79708861
RL		 3594 switch (task->tk_status) {
3595 case -NFS4ERR_STALE_STATEID:
3596 case -NFS4ERR_EXPIRED:
3597 case 0:
fa178f29 3598 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3599 break;
3600 default:
3601 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3602 -EAGAIN) {
3603 nfs_restart_rpc(task, data->res.server->nfs_client);
3604 return;
3605 }
3606 }
3607 data->rpc_status = task->tk_status;
fe650407
TM		 3608}
3609
3610static void nfs4_delegreturn_release(void *calldata)
3611{
fe650407
TM		 3612 kfree(calldata);
3613}
3614
938e1010
AA		 3615#if defined(CONFIG_NFS_V4_1)
3616static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3617{
3618 struct nfs4_delegreturndata *d_data;
3619
3620 d_data = (struct nfs4_delegreturndata *)data;
3621
3622 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3623 &d_data->args.seq_args,
3624 &d_data->res.seq_res, 1, task))
3625 return;
3626 rpc_call_start(task);
3627}
3628#endif /* CONFIG_NFS_V4_1 */
3629
c8d149f3 3630static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3631#if defined(CONFIG_NFS_V4_1)
3632 .rpc_call_prepare = nfs4_delegreturn_prepare,
3633#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3634 .rpc_call_done = nfs4_delegreturn_done,
3635 .rpc_release = nfs4_delegreturn_release,
3636};
3637
e6f81075 3638static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3639{
3640 struct nfs4_delegreturndata *data;
fa178f29 3641 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3642 struct rpc_task *task;
5138fde0
TM		 3643 struct rpc_message msg = {
3644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3645 .rpc_cred = cred,
3646 };
c970aa85
TM		 3647 struct rpc_task_setup task_setup_data = {
3648 .rpc_client = server->client,
5138fde0 3649 .rpc_message = &msg,
c970aa85
TM		 3650 .callback_ops = &nfs4_delegreturn_ops,
3651 .flags = RPC_TASK_ASYNC,
3652 };
e6f81075 3653 int status = 0;
fe650407 3654
938e1010 3655 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3656 if (data == NULL)
3657 return -ENOMEM;
3658 data->args.fhandle = &data->fh;
3659 data->args.stateid = &data->stateid;
fa178f29 3660 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3661 nfs_copy_fh(&data->fh, NFS_FH(inode));
3662 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3663 data->res.fattr = &data->fattr;
3664 data->res.server = server;
5f7dbd5c 3665 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3666 nfs_fattr_init(data->res.fattr);
26e976a8 3667 data->timestamp = jiffies;
fe650407
TM		 3668 data->rpc_status = 0;
3669
c970aa85 3670 task_setup_data.callback_data = data;
5138fde0
TM		 3671 msg.rpc_argp = &data->args,
3672 msg.rpc_resp = &data->res,
c970aa85 3673 task = rpc_run_task(&task_setup_data);
7a1218a2 3674 if (IS_ERR(task))
fe650407 3675 return PTR_ERR(task);
e6f81075
TM		 3676 if (!issync)
3677 goto out;
fe650407 3678 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3679 if (status != 0)
3680 goto out;
3681 status = data->rpc_status;
3682 if (status != 0)
3683 goto out;
3684 nfs_refresh_inode(inode, &data->fattr);
3685out:
e6b3c4db 3686 rpc_put_task(task);
fe650407 3687 return status;
1da177e4
LT		 3688}
3689
e6f81075 3690int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3691{
3692 struct nfs_server *server = NFS_SERVER(inode);
3693 struct nfs4_exception exception = { };
3694 int err;
3695 do {
e6f81075 3696 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3697 switch (err) {
3698 case -NFS4ERR_STALE_STATEID:
3699 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3700 case 0:
3701 return 0;
3702 }
3703 err = nfs4_handle_exception(server, err, &exception);
3704 } while (exception.retry);
3705 return err;
3706}
3707
3708#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3709#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3710
3711/*
3712 * sleep, with exponential backoff, and retry the LOCK operation.
3713 */
3714static unsigned long
3715nfs4_set_lock_task_retry(unsigned long timeout)
3716{
150030b7 3717 schedule_timeout_killable(timeout);
1da177e4
LT		 3718 timeout <<= 1;
3719 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3720 return NFS4_LOCK_MAXTIMEOUT;
3721 return timeout;
3722}
3723
1da177e4
LT		 3724static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3725{
3726 struct inode *inode = state->inode;
3727 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3728 struct nfs_client *clp = server->nfs_client;
911d1aaf 3729 struct nfs_lockt_args arg = {
1da177e4 3730 .fh = NFS_FH(inode),
911d1aaf 3731 .fl = request,
1da177e4 3732 };
911d1aaf
TM		 3733 struct nfs_lockt_res res = {
3734 .denied = request,
1da177e4
LT		 3735 };
3736 struct rpc_message msg = {
3737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3738 .rpc_argp = &arg,
3739 .rpc_resp = &res,
3740 .rpc_cred = state->owner->so_cred,
3741 };
1da177e4
LT		 3742 struct nfs4_lock_state *lsp;
3743 int status;
3744
911d1aaf 3745 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3746 status = nfs4_set_lock_state(state, request);
3747 if (status != 0)
3748 goto out;
3749 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3750 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3751 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3752 switch (status) {
3753 case 0:
3754 request->fl_type = F_UNLCK;
3755 break;
3756 case -NFS4ERR_DENIED:
3757 status = 0;
1da177e4 3758 }
70cc6487 3759 request->fl_ops->fl_release_private(request);
8d0a8a9d 3760out:
1da177e4
LT		 3761 return status;
3762}
3763
3764static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3765{
3766 struct nfs4_exception exception = { };
3767 int err;
3768
3769 do {
3770 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3771 _nfs4_proc_getlk(state, cmd, request),
3772 &exception);
3773 } while (exception.retry);
3774 return err;
3775}
3776
3777static int do_vfs_lock(struct file *file, struct file_lock *fl)
3778{
3779 int res = 0;
3780 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3781 case FL_POSIX:
3782 res = posix_lock_file_wait(file, fl);
3783 break;
3784 case FL_FLOCK:
3785 res = flock_lock_file_wait(file, fl);
3786 break;
3787 default:
3788 BUG();
3789 }
1da177e4
LT		 3790 return res;
3791}
3792
faf5f49c 3793struct nfs4_unlockdata {
911d1aaf
TM		 3794 struct nfs_locku_args arg;
3795 struct nfs_locku_res res;
faf5f49c
TM		 3796 struct nfs4_lock_state *lsp;
3797 struct nfs_open_context *ctx;
911d1aaf
TM		 3798 struct file_lock fl;
3799 const struct nfs_server *server;
26e976a8 3800 unsigned long timestamp;
faf5f49c
TM		 3801};
3802
911d1aaf
TM		 3803static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3804 struct nfs_open_context *ctx,
3805 struct nfs4_lock_state *lsp,
3806 struct nfs_seqid *seqid)
3807{
3808 struct nfs4_unlockdata *p;
3809 struct inode *inode = lsp->ls_state->inode;
3810
a893693c 3811 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3812 if (p == NULL)
3813 return NULL;
3814 p->arg.fh = NFS_FH(inode);
3815 p->arg.fl = &p->fl;
3816 p->arg.seqid = seqid;
c1d51931 3817 p->res.seqid = seqid;
5f7dbd5c 3818 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3819 p->arg.stateid = &lsp->ls_stateid;
3820 p->lsp = lsp;
3821 atomic_inc(&lsp->ls_count);
3822 /* Ensure we don't close file until we're done freeing locks! */
3823 p->ctx = get_nfs_open_context(ctx);
3824 memcpy(&p->fl, fl, sizeof(p->fl));
3825 p->server = NFS_SERVER(inode);
3826 return p;
3827}
3828
06f814a3 3829static void nfs4_locku_release_calldata(void *data)
faf5f49c 3830{
963d8fe5 3831 struct nfs4_unlockdata *calldata = data;
911d1aaf 3832 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3833 nfs4_put_lock_state(calldata->lsp);
3834 put_nfs_open_context(calldata->ctx);
3835 kfree(calldata);
faf5f49c
TM		 3836}
3837
963d8fe5 3838static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3839{
963d8fe5 3840 struct nfs4_unlockdata *calldata = data;
faf5f49c 3841
a893693c
AA		 3842 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3843 task->tk_status);
06f814a3
TM		 3844 if (RPC_ASSASSINATED(task))
3845 return;
faf5f49c
TM		 3846 switch (task->tk_status) {
3847 case 0:
3848 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3849 calldata->res.stateid.data,
faf5f49c 3850 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3851 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3852 break;
9e33bed5
TM		 3853 case -NFS4ERR_BAD_STATEID:
3854 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3855 case -NFS4ERR_STALE_STATEID:
3856 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3857 break;
3858 default:
9e33bed5 3859 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3860 nfs_restart_rpc(task,
d61e612a 3861 calldata->server->nfs_client);
faf5f49c 3862 }
faf5f49c
TM		 3863}
3864
4ce70ada 3865static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3866{
4ce70ada 3867 struct nfs4_unlockdata *calldata = data;
faf5f49c 3868
911d1aaf 3869 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3870 return;
3871 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3872 /* Note: exit _without_ running nfs4_locku_done */
3873 task->tk_action = NULL;
faf5f49c
TM		 3874 return;
3875 }
26e976a8 3876 calldata->timestamp = jiffies;
a893693c
AA		 3877 if (nfs4_setup_sequence(calldata->server->nfs_client,
3878 &calldata->arg.seq_args,
3879 &calldata->res.seq_res, 1, task))
3880 return;
5138fde0 3881 rpc_call_start(task);
faf5f49c
TM		 3882}
3883
963d8fe5 3884static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3885 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3886 .rpc_call_done = nfs4_locku_done,
06f814a3 3887 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3888};
3889
a5d16a4d
TM		 3890static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3891 struct nfs_open_context *ctx,
3892 struct nfs4_lock_state *lsp,
3893 struct nfs_seqid *seqid)
3894{
3895 struct nfs4_unlockdata *data;
5138fde0
TM		 3896 struct rpc_message msg = {
3897 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3898 .rpc_cred = ctx->cred,
3899 };
c970aa85
TM		 3900 struct rpc_task_setup task_setup_data = {
3901 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3902 .rpc_message = &msg,
c970aa85 3903 .callback_ops = &nfs4_locku_ops,
101070ca 3904 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3905 .flags = RPC_TASK_ASYNC,
3906 };
a5d16a4d 3907
137d6aca
FF		 3908 /* Ensure this is an unlock - when canceling a lock, the
3909 * canceled lock is passed in, and it won't be an unlock.
3910 */
3911 fl->fl_type = F_UNLCK;
3912
a5d16a4d
TM		 3913 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3914 if (data == NULL) {
3915 nfs_free_seqid(seqid);
3916 return ERR_PTR(-ENOMEM);
3917 }
3918
5138fde0
TM		 3919 msg.rpc_argp = &data->arg,
3920 msg.rpc_resp = &data->res,
c970aa85
TM		 3921 task_setup_data.callback_data = data;
3922 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3923}
3924
faf5f49c
TM		 3925static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3926{
19e03c57 3927 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3928 struct nfs_seqid *seqid;
1da177e4 3929 struct nfs4_lock_state *lsp;
06f814a3
TM		 3930 struct rpc_task *task;
3931 int status = 0;
536ff0f8 3932 unsigned char fl_flags = request->fl_flags;
faf5f49c 3933
8d0a8a9d 3934 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3935 /* Unlock _before_ we do the RPC call */
3936 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3937 down_read(&nfsi->rwsem);
3938 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3939 up_read(&nfsi->rwsem);
9b073574 3940 goto out;
19e03c57
TM		 3941 }
3942 up_read(&nfsi->rwsem);
8d0a8a9d 3943 if (status != 0)
9b073574
TM		 3944 goto out;
3945 /* Is this a delegated lock? */
3946 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3947 goto out;
8d0a8a9d 3948 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3949 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3950 status = -ENOMEM;
911d1aaf 3951 if (seqid == NULL)
9b073574 3952 goto out;
cd3758e3 3953 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3954 status = PTR_ERR(task);
3955 if (IS_ERR(task))
9b073574 3956 goto out;
a5d16a4d 3957 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3958 rpc_put_task(task);
9b073574 3959out:
536ff0f8 3960 request->fl_flags = fl_flags;
1da177e4
LT		 3961 return status;
3962}
3963
a5d16a4d
TM		 3964struct nfs4_lockdata {
3965 struct nfs_lock_args arg;
3966 struct nfs_lock_res res;
3967 struct nfs4_lock_state *lsp;
3968 struct nfs_open_context *ctx;
3969 struct file_lock fl;
26e976a8 3970 unsigned long timestamp;
a5d16a4d
TM		 3971 int rpc_status;
3972 int cancelled;
66179efe 3973 struct nfs_server *server;
a5d16a4d
TM		 3974};
3975
3976static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3977 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3978{
a5d16a4d
TM		 3979 struct nfs4_lockdata *p;
3980 struct inode *inode = lsp->ls_state->inode;
1da177e4 3981 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3982
3983 p = kzalloc(sizeof(*p), GFP_KERNEL);
3984 if (p == NULL)
3985 return NULL;
3986
3987 p->arg.fh = NFS_FH(inode);
3988 p->arg.fl = &p->fl;
2f74c0a0
TM		 3989 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3990 if (p->arg.open_seqid == NULL)
3991 goto out_free;
a5d16a4d
TM		 3992 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3993 if (p->arg.lock_seqid == NULL)
2f74c0a0 3994 goto out_free_seqid;
a5d16a4d 3995 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3996 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3997 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3998 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3999 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 4000 p->lsp = lsp;
66179efe 4001 p->server = server;
a5d16a4d
TM		 4002 atomic_inc(&lsp->ls_count);
4003 p->ctx = get_nfs_open_context(ctx);
4004 memcpy(&p->fl, fl, sizeof(p->fl));
4005 return p;
2f74c0a0
TM		 4006out_free_seqid:
4007 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4008out_free:
4009 kfree(p);
4010 return NULL;
4011}
4012
4013static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4014{
4015 struct nfs4_lockdata *data = calldata;
4016 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4017
3110ff80 4018 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4019 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4020 return;
a5d16a4d
TM		 4021 /* Do we need to do an open_to_lock_owner? */
4022 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4023 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4024 return;
a5d16a4d
TM		 4025 data->arg.open_stateid = &state->stateid;
4026 data->arg.new_lock_owner = 1;
c1d51931 4027 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4028 } else
4029 data->arg.new_lock_owner = 0;
26e976a8 4030 data->timestamp = jiffies;
66179efe
AA		 4031 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
4032 &data->res.seq_res, 1, task))
4033 return;
5138fde0 4034 rpc_call_start(task);
3110ff80 4035 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4036}
4037
b257957e
AB		 4038static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4039{
4040 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4041 nfs4_lock_prepare(task, calldata);
4042}
4043
a5d16a4d
TM		 4044static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4045{
4046 struct nfs4_lockdata *data = calldata;
4047
3110ff80 4048 dprintk("%s: begin!\n", __func__);
a5d16a4d 4049
d61e612a
TM		 4050 nfs4_sequence_done(data->server, &data->res.seq_res,
4051 task->tk_status);
66179efe 4052
a5d16a4d
TM		 4053 data->rpc_status = task->tk_status;
4054 if (RPC_ASSASSINATED(task))
4055 goto out;
4056 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4057 if (data->rpc_status == 0)
4058 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4059 else
4060 goto out;
4061 }
4062 if (data->rpc_status == 0) {
4063 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4064 sizeof(data->lsp->ls_stateid.data));
4065 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4066 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4067 }
a5d16a4d 4068out:
3110ff80 4069 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4070}
4071
4072static void nfs4_lock_release(void *calldata)
4073{
4074 struct nfs4_lockdata *data = calldata;
4075
3110ff80 4076 dprintk("%s: begin!\n", __func__);
2f74c0a0 4077 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4078 if (data->cancelled != 0) {
4079 struct rpc_task *task;
4080 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4081 data->arg.lock_seqid);
4082 if (!IS_ERR(task))
e6b3c4db 4083 rpc_put_task(task);
3110ff80 4084 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4085 } else
4086 nfs_free_seqid(data->arg.lock_seqid);
4087 nfs4_put_lock_state(data->lsp);
4088 put_nfs_open_context(data->ctx);
4089 kfree(data);
3110ff80 4090 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4091}
4092
4093static const struct rpc_call_ops nfs4_lock_ops = {
4094 .rpc_call_prepare = nfs4_lock_prepare,
4095 .rpc_call_done = nfs4_lock_done,
4096 .rpc_release = nfs4_lock_release,
4097};
4098
b257957e
AB		 4099static const struct rpc_call_ops nfs4_recover_lock_ops = {
4100 .rpc_call_prepare = nfs4_recover_lock_prepare,
4101 .rpc_call_done = nfs4_lock_done,
4102 .rpc_release = nfs4_lock_release,
4103};
4104
2bee72a6
TM		 4105static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4106{
4107 struct nfs_client *clp = server->nfs_client;
4108 struct nfs4_state *state = lsp->ls_state;
4109
4110 switch (error) {
4111 case -NFS4ERR_ADMIN_REVOKED:
4112 case -NFS4ERR_BAD_STATEID:
4113 case -NFS4ERR_EXPIRED:
4114 if (new_lock_owner != 0 ||
4115 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4116 nfs4_state_mark_reclaim_nograce(clp, state);
4117 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4118 break;
4119 case -NFS4ERR_STALE_STATEID:
4120 if (new_lock_owner != 0 ||
4121 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4122 nfs4_state_mark_reclaim_reboot(clp, state);
4123 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4124 };
4125}
4126
afe6c27c 4127static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4128{
4129 struct nfs4_lockdata *data;
4130 struct rpc_task *task;
5138fde0
TM		 4131 struct rpc_message msg = {
4132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4133 .rpc_cred = state->owner->so_cred,
4134 };
c970aa85
TM		 4135 struct rpc_task_setup task_setup_data = {
4136 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4137 .rpc_message = &msg,
c970aa85 4138 .callback_ops = &nfs4_lock_ops,
101070ca 4139 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4140 .flags = RPC_TASK_ASYNC,
4141 };
a5d16a4d
TM		 4142 int ret;
4143
3110ff80 4144 dprintk("%s: begin!\n", __func__);
cd3758e3 4145 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 4146 fl->fl_u.nfs4_fl.owner);
4147 if (data == NULL)
4148 return -ENOMEM;
4149 if (IS_SETLKW(cmd))
4150 data->arg.block = 1;
b257957e
AB		 4151 if (recovery_type > NFS_LOCK_NEW) {
4152 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4153 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4154 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4155 }
5138fde0
TM		 4156 msg.rpc_argp = &data->arg,
4157 msg.rpc_resp = &data->res,
c970aa85
TM		 4158 task_setup_data.callback_data = data;
4159 task = rpc_run_task(&task_setup_data);
7a1218a2 4160 if (IS_ERR(task))
a5d16a4d 4161 return PTR_ERR(task);
a5d16a4d
TM		 4162 ret = nfs4_wait_for_completion_rpc_task(task);
4163 if (ret == 0) {
4164 ret = data->rpc_status;
2bee72a6
TM		 4165 if (ret)
4166 nfs4_handle_setlk_error(data->server, data->lsp,
4167 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4168 } else
4169 data->cancelled = 1;
e6b3c4db 4170 rpc_put_task(task);
3110ff80 4171 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4172 return ret;
1da177e4
LT		 4173}
4174
4175static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4176{
202b50dc
TM		 4177 struct nfs_server *server = NFS_SERVER(state->inode);
4178 struct nfs4_exception exception = { };
4179 int err;
4180
4181 do {
42a2d13e
TM		 4182 /* Cache the lock if possible... */
4183 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4184 return 0;
afe6c27c 4185 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4186 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4187 break;
4188 nfs4_handle_exception(server, err, &exception);
4189 } while (exception.retry);
4190 return err;
1da177e4
LT		 4191}
4192
4193static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4194{
202b50dc
TM		 4195 struct nfs_server *server = NFS_SERVER(state->inode);
4196 struct nfs4_exception exception = { };
4197 int err;
4198
6bfc93ef
TM		 4199 err = nfs4_set_lock_state(state, request);
4200 if (err != 0)
4201 return err;
202b50dc 4202 do {
42a2d13e
TM		 4203 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4204 return 0;
afe6c27c 4205 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4206 switch (err) {
4207 default:
4208 goto out;
4209 case -NFS4ERR_GRACE:
4210 case -NFS4ERR_DELAY:
2c643488 4211 case -EKEYEXPIRED:
a9ed2e25
TM		 4212 nfs4_handle_exception(server, err, &exception);
4213 err = 0;
4214 }
202b50dc 4215 } while (exception.retry);
a9ed2e25 4216out:
202b50dc 4217 return err;
1da177e4
LT		 4218}
4219
4220static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4221{
19e03c57 4222 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4223 unsigned char fl_flags = request->fl_flags;
8e469ebd 4224 int status = -ENOLCK;
1da177e4 4225
8e469ebd
TM		 4226 if ((fl_flags & FL_POSIX) &&
4227 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4228 goto out;
6bfc93ef 4229 /* Is this a delegated open? */
6bfc93ef
TM		 4230 status = nfs4_set_lock_state(state, request);
4231 if (status != 0)
4232 goto out;
01c3b861
TM		 4233 request->fl_flags |= FL_ACCESS;
4234 status = do_vfs_lock(request->fl_file, request);
4235 if (status < 0)
4236 goto out;
19e03c57 4237 down_read(&nfsi->rwsem);
01c3b861 4238 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4239 /* Yes: cache locks! */
01c3b861 4240 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4241 request->fl_flags = fl_flags & ~FL_SLEEP;
4242 status = do_vfs_lock(request->fl_file, request);
4243 goto out_unlock;
01c3b861 4244 }
afe6c27c 4245 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4246 if (status != 0)
01c3b861 4247 goto out_unlock;
6bfc93ef 4248 /* Note: we always want to sleep here! */
01c3b861 4249 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4250 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4251 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4252out_unlock:
19e03c57 4253 up_read(&nfsi->rwsem);
01c3b861
TM		 4254out:
4255 request->fl_flags = fl_flags;
1da177e4
LT		 4256 return status;
4257}
4258
4259static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4260{
4261 struct nfs4_exception exception = { };
4262 int err;
4263
4264 do {
965b5d67
TM		 4265 err = _nfs4_proc_setlk(state, cmd, request);
4266 if (err == -NFS4ERR_DENIED)
4267 err = -EAGAIN;
1da177e4 4268 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4269 err, &exception);
1da177e4
LT		 4270 } while (exception.retry);
4271 return err;
4272}
4273
4274static int
4275nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4276{
4277 struct nfs_open_context *ctx;
4278 struct nfs4_state *state;
4279 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4280 int status;
4281
4282 /* verify open state */
cd3758e3 4283 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4284 state = ctx->state;
4285
4286 if (request->fl_start < 0 || request->fl_end < 0)
4287 return -EINVAL;
4288
d953126a
TM		 4289 if (IS_GETLK(cmd)) {
4290 if (state != NULL)
4291 return nfs4_proc_getlk(state, F_GETLK, request);
4292 return 0;
4293 }
1da177e4
LT		 4294
4295 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4296 return -EINVAL;
4297
d953126a
TM		 4298 if (request->fl_type == F_UNLCK) {
4299 if (state != NULL)
4300 return nfs4_proc_unlck(state, cmd, request);
4301 return 0;
4302 }
1da177e4 4303
d953126a
TM		 4304 if (state == NULL)
4305 return -ENOLCK;
1da177e4
LT		 4306 do {
4307 status = nfs4_proc_setlk(state, cmd, request);
4308 if ((status != -EAGAIN) || IS_SETLK(cmd))
4309 break;
4310 timeout = nfs4_set_lock_task_retry(timeout);
4311 status = -ERESTARTSYS;
4312 if (signalled())
4313 break;
4314 } while(status < 0);
1da177e4
LT		 4315 return status;
4316}
4317
888e694c
TM		 4318int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4319{
4320 struct nfs_server *server = NFS_SERVER(state->inode);
4321 struct nfs4_exception exception = { };
4322 int err;
4323
4324 err = nfs4_set_lock_state(state, fl);
4325 if (err != 0)
4326 goto out;
4327 do {
afe6c27c 4328 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4329 switch (err) {
4330 default:
4331 printk(KERN_ERR "%s: unhandled error %d.\n",
4332 __func__, err);
4333 case 0:
965b5d67 4334 case -ESTALE:
d5122201
TM		 4335 goto out;
4336 case -NFS4ERR_EXPIRED:
4337 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4338 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4339 case -NFS4ERR_BADSESSION:
4340 case -NFS4ERR_BADSLOT:
4341 case -NFS4ERR_BAD_HIGH_SLOT:
4342 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4343 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4344 nfs4_schedule_state_recovery(server->nfs_client);
4345 goto out;
965b5d67
TM		 4346 case -ERESTARTSYS:
4347 /*
4348 * The show must go on: exit, but mark the
4349 * stateid as needing recovery.
4350 */
4351 case -NFS4ERR_ADMIN_REVOKED:
4352 case -NFS4ERR_BAD_STATEID:
4353 case -NFS4ERR_OPENMODE:
4354 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4355 err = 0;
4356 goto out;
4357 case -ENOMEM:
4358 case -NFS4ERR_DENIED:
4359 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4360 err = 0;
4361 goto out;
d5122201 4362 case -NFS4ERR_DELAY:
2c643488 4363 case -EKEYEXPIRED:
d5122201
TM		 4364 break;
4365 }
888e694c
TM		 4366 err = nfs4_handle_exception(server, err, &exception);
4367 } while (exception.retry);
4368out:
4369 return err;
4370}
6b3b5496 4371
aa1870af
BF		 4372#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4373
6b3b5496
BF		 4374int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4375 size_t buflen, int flags)
4376{
4b580ee3
BF		 4377 struct inode *inode = dentry->d_inode;
4378
4379 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4380 return -EOPNOTSUPP;
4381
4b580ee3 4382 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4383}
4384
4385/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4386 * and that's what we'll do for e.g. user attributes that haven't been set.
4387 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4388 * attributes in kernel-managed attribute namespaces. */
4389ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4390 size_t buflen)
4391{
aa1870af
BF		 4392 struct inode *inode = dentry->d_inode;
4393
4394 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4395 return -EOPNOTSUPP;
4396
4397 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4398}
4399
4400ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4401{
aa1870af 4402 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4403
096455a2
BF		 4404 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4405 return 0;
6b3b5496
BF		 4406 if (buf && buflen < len)
4407 return -ERANGE;
4408 if (buf)
aa1870af
BF		 4409 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4410 return len;
6b3b5496
BF		 4411}
4412
69aaaae1
TM		 4413static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4414{
4415 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4416 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4417 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4418 return;
4419
4420 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4421 NFS_ATTR_FATTR_NLINK;
4422 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4423 fattr->nlink = 2;
4424}
4425
56659e99 4426int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4427 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4428{
4429 struct nfs_server *server = NFS_SERVER(dir);
4430 u32 bitmask[2] = {
361e624f
MN		 4431 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4432 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4433 };
4434 struct nfs4_fs_locations_arg args = {
4435 .dir_fh = NFS_FH(dir),
c228fd3a 4436 .name = name,
683b57b4
TM		 4437 .page = page,
4438 .bitmask = bitmask,
4439 };
22958463
BH		 4440 struct nfs4_fs_locations_res res = {
4441 .fs_locations = fs_locations,
4442 };
683b57b4
TM		 4443 struct rpc_message msg = {
4444 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4445 .rpc_argp = &args,
22958463 4446 .rpc_resp = &res,
683b57b4
TM		 4447 };
4448 int status;
4449
3110ff80 4450 dprintk("%s: start\n", __func__);
c228fd3a 4451 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4452 fs_locations->server = server;
830b8e33 4453 fs_locations->nlocations = 0;
cccef3b9 4454 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4455 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4456 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4457 return status;
4458}
4459
557134a3 4460#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4461/*
4462 * nfs4_proc_exchange_id()
4463 *
4464 * Since the clientid has expired, all compounds using sessions
4465 * associated with the stale clientid will be returning
4466 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4467 * be in some phase of session reset.
4468 */
4d643d1d 4469int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4470{
4471 nfs4_verifier verifier;
4472 struct nfs41_exchange_id_args args = {
4473 .client = clp,
4474 .flags = clp->cl_exchange_flags,
4475 };
4476 struct nfs41_exchange_id_res res = {
4477 .client = clp,
4478 };
4479 int status;
4480 struct rpc_message msg = {
4481 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4482 .rpc_argp = &args,
4483 .rpc_resp = &res,
4484 .rpc_cred = cred,
4485 };
4486 __be32 *p;
4487
4488 dprintk("--> %s\n", __func__);
4489 BUG_ON(clp == NULL);
a7b72103 4490
7b183d0d
AB		 4491 /* Remove server-only flags */
4492 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4493
99fe60d0
BH		 4494 p = (u32 *)verifier.data;
4495 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4496 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4497 args.verifier = &verifier;
4498
4499 while (1) {
4500 args.id_len = scnprintf(args.id, sizeof(args.id),
4501 "%s/%s %u",
4502 clp->cl_ipaddr,
4503 rpc_peeraddr2str(clp->cl_rpcclient,
4504 RPC_DISPLAY_ADDR),
4505 clp->cl_id_uniquifier);
4506
4507 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4508
4509 if (status != NFS4ERR_CLID_INUSE)
4510 break;
4511
4512 if (signalled())
4513 break;
4514
4515 if (++clp->cl_id_uniquifier == 0)
4516 break;
4517 }
4518
4519 dprintk("<-- %s status= %d\n", __func__, status);
4520 return status;
4521}
4522
2050f0cc
AA		 4523struct nfs4_get_lease_time_data {
4524 struct nfs4_get_lease_time_args *args;
4525 struct nfs4_get_lease_time_res *res;
4526 struct nfs_client *clp;
4527};
4528
4529static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4530 void *calldata)
4531{
4532 int ret;
4533 struct nfs4_get_lease_time_data *data =
4534 (struct nfs4_get_lease_time_data *)calldata;
4535
4536 dprintk("--> %s\n", __func__);
689cf5c1 4537 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4538 /* just setup sequence, do not trigger session recovery
4539 since we're invoked within one */
4540 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4541 &data->args->la_seq_args,
4542 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4543
4544 BUG_ON(ret == -EAGAIN);
4545 rpc_call_start(task);
4546 dprintk("<-- %s\n", __func__);
4547}
4548
4549/*
4550 * Called from nfs4_state_manager thread for session setup, so don't recover
4551 * from sequence operation or clientid errors.
4552 */
4553static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4554{
4555 struct nfs4_get_lease_time_data *data =
4556 (struct nfs4_get_lease_time_data *)calldata;
4557
4558 dprintk("--> %s\n", __func__);
4559 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4560 switch (task->tk_status) {
4561 case -NFS4ERR_DELAY:
4562 case -NFS4ERR_GRACE:
2c643488 4563 case -EKEYEXPIRED:
2050f0cc
AA		 4564 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4565 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4566 task->tk_status = 0;
0110ee15 4567 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4568 return;
4569 }
2050f0cc
AA		 4570 dprintk("<-- %s\n", __func__);
4571}
4572
4573struct rpc_call_ops nfs4_get_lease_time_ops = {
4574 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4575 .rpc_call_done = nfs4_get_lease_time_done,
4576};
4577
4578int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4579{
4580 struct rpc_task *task;
4581 struct nfs4_get_lease_time_args args;
4582 struct nfs4_get_lease_time_res res = {
4583 .lr_fsinfo = fsinfo,
4584 };
4585 struct nfs4_get_lease_time_data data = {
4586 .args = &args,
4587 .res = &res,
4588 .clp = clp,
4589 };
4590 struct rpc_message msg = {
4591 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4592 .rpc_argp = &args,
4593 .rpc_resp = &res,
4594 };
4595 struct rpc_task_setup task_setup = {
4596 .rpc_client = clp->cl_rpcclient,
4597 .rpc_message = &msg,
4598 .callback_ops = &nfs4_get_lease_time_ops,
4599 .callback_data = &data
4600 };
4601 int status;
4602
4603 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4604 dprintk("--> %s\n", __func__);
4605 task = rpc_run_task(&task_setup);
4606
4607 if (IS_ERR(task))
4608 status = PTR_ERR(task);
4609 else {
4610 status = task->tk_status;
4611 rpc_put_task(task);
4612 }
4613 dprintk("<-- %s return %d\n", __func__, status);
4614
4615 return status;
4616}
4617
b73dafa7
RL		 4618/*
4619 * Reset a slot table
4620 */
104aeba4
AA		 4621static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4622 int ivalue)
ac72b7b3 4623{
104aeba4 4624 struct nfs4_slot *new = NULL;
b73dafa7 4625 int i;
ac72b7b3
AA		 4626 int ret = 0;
4627
104aeba4
AA		 4628 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4629 max_reqs, tbl->max_slots);
ac72b7b3 4630
104aeba4
AA		 4631 /* Does the newly negotiated max_reqs match the existing slot table? */
4632 if (max_reqs != tbl->max_slots) {
4633 ret = -ENOMEM;
4634 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4635 GFP_KERNEL);
4636 if (!new)
4637 goto out;
4638 ret = 0;
4639 kfree(tbl->slots);
ac72b7b3
AA		 4640 }
4641 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4642 if (new) {
4643 tbl->slots = new;
4644 tbl->max_slots = max_reqs;
4645 }
4646 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4647 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4648 spin_unlock(&tbl->slot_tbl_lock);
4649 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4650 tbl, tbl->slots, tbl->max_slots);
4651out:
4652 dprintk("<-- %s: return %d\n", __func__, ret);
4653 return ret;
4654}
4655
b73dafa7
RL		 4656/*
4657 * Reset the forechannel and backchannel slot tables
4658 */
4659static int nfs4_reset_slot_tables(struct nfs4_session *session)
4660{
4661 int status;
4662
4663 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4664 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4665 if (status)
4666 return status;
4667
4668 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4669 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4670 return status;
4671}
4672
f8625a6a
RL		 4673/* Destroy the slot table */
4674static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4675{
4676 if (session->fc_slot_table.slots != NULL) {
4677 kfree(session->fc_slot_table.slots);
4678 session->fc_slot_table.slots = NULL;
4679 }
4680 if (session->bc_slot_table.slots != NULL) {
4681 kfree(session->bc_slot_table.slots);
4682 session->bc_slot_table.slots = NULL;
4683 }
4684 return;
4685}
4686
fc931582
AA		 4687/*
4688 * Initialize slot table
4689 */
050047ce
RL		 4690static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4691 int max_slots, int ivalue)
fc931582 4692{
fc931582
AA		 4693 struct nfs4_slot *slot;
4694 int ret = -ENOMEM;
4695
4696 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4697
050047ce 4698 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4699
4700 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4701 if (!slot)
4702 goto out;
fc931582
AA		 4703 ret = 0;
4704
4705 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4706 tbl->max_slots = max_slots;
4707 tbl->slots = slot;
4708 tbl->highest_used_slotid = -1; /* no slot is currently used */
4709 spin_unlock(&tbl->slot_tbl_lock);
4710 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4711 tbl, tbl->slots, tbl->max_slots);
4712out:
4713 dprintk("<-- %s: return %d\n", __func__, ret);
4714 return ret;
fc931582
AA		 4715}
4716
050047ce
RL		 4717/*
4718 * Initialize the forechannel and backchannel tables
4719 */
4720static int nfs4_init_slot_tables(struct nfs4_session *session)
4721{
f26468fb
TM		 4722 struct nfs4_slot_table *tbl;
4723 int status = 0;
050047ce 4724
f26468fb
TM		 4725 tbl = &session->fc_slot_table;
4726 if (tbl->slots == NULL) {
4727 status = nfs4_init_slot_table(tbl,
4728 session->fc_attrs.max_reqs, 1);
4729 if (status)
4730 return status;
4731 }
050047ce 4732
f26468fb
TM		 4733 tbl = &session->bc_slot_table;
4734 if (tbl->slots == NULL) {
4735 status = nfs4_init_slot_table(tbl,
4736 session->bc_attrs.max_reqs, 0);
4737 if (status)
4738 nfs4_destroy_slot_tables(session);
4739 }
f8625a6a
RL		 4740
4741 return status;
557134a3
AA		 4742}
4743
4744struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4745{
4746 struct nfs4_session *session;
4747 struct nfs4_slot_table *tbl;
4748
4749 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4750 if (!session)
4751 return NULL;
76db6d95 4752
76db6d95
AA		 4753 /*
4754 * The create session reply races with the server back
4755 * channel probe. Mark the client NFS_CS_SESSION_INITING
4756 * so that the client back channel can find the
4757 * nfs_client struct
4758 */
4759 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4760 init_completion(&session->complete);
76db6d95 4761
557134a3 4762 tbl = &session->fc_slot_table;
9dfdf404 4763 tbl->highest_used_slotid = -1;
557134a3 4764 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4765 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4766
4767 tbl = &session->bc_slot_table;
9dfdf404 4768 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4769 spin_lock_init(&tbl->slot_tbl_lock);
4770 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4771
557134a3
AA		 4772 session->clp = clp;
4773 return session;
4774}
4775
4776void nfs4_destroy_session(struct nfs4_session *session)
4777{
5a0ffe54
AA		 4778 nfs4_proc_destroy_session(session);
4779 dprintk("%s Destroy backchannel for xprt %p\n",
4780 __func__, session->clp->cl_rpcclient->cl_xprt);
4781 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4782 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4783 nfs4_destroy_slot_tables(session);
557134a3
AA		 4784 kfree(session);
4785}
4786
fc931582
AA		 4787/*
4788 * Initialize the values to be used by the client in CREATE_SESSION
4789 * If nfs4_init_session set the fore channel request and response sizes,
4790 * use them.
4791 *
4792 * Set the back channel max_resp_sz_cached to zero to force the client to
4793 * always set csa_cachethis to FALSE because the current implementation
4794 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4795 */
4796static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4797{
4798 struct nfs4_session *session = args->client->cl_session;
4799 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4800 mxresp_sz = session->fc_attrs.max_resp_sz;
4801
4802 if (mxrqst_sz == 0)
4803 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4804 if (mxresp_sz == 0)
4805 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4806 /* Fore channel attributes */
4807 args->fc_attrs.headerpadsz = 0;
4808 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4809 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4810 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4811 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4812
4813 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4814 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4815 __func__,
4816 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4817 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4818
4819 /* Back channel attributes */
4820 args->bc_attrs.headerpadsz = 0;
4821 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4822 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4823 args->bc_attrs.max_resp_sz_cached = 0;
4824 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4825 args->bc_attrs.max_reqs = 1;
4826
4827 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4828 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4829 __func__,
4830 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4831 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4832 args->bc_attrs.max_reqs);
4833}
4834
8d35301d
AA		 4835static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4836{
4837 if (rcvd <= sent)
4838 return 0;
4839 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4840 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4841 return -EINVAL;
4842}
4843
4844#define _verify_fore_channel_attr(_name_) \
4845 _verify_channel_attr("fore", #_name_, \
4846 args->fc_attrs._name_, \
4847 session->fc_attrs._name_)
4848
4849#define _verify_back_channel_attr(_name_) \
4850 _verify_channel_attr("back", #_name_, \
4851 args->bc_attrs._name_, \
4852 session->bc_attrs._name_)
4853
4854/*
4855 * The server is not allowed to increase the fore channel header pad size,
4856 * maximum response size, or maximum number of operations.
4857 *
4858 * The back channel attributes are only negotiatied down: We send what the
4859 * (back channel) server insists upon.
4860 */
4861static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4862 struct nfs4_session *session)
4863{
4864 int ret = 0;
4865
4866 ret |= _verify_fore_channel_attr(headerpadsz);
4867 ret |= _verify_fore_channel_attr(max_resp_sz);
4868 ret |= _verify_fore_channel_attr(max_ops);
4869
4870 ret |= _verify_back_channel_attr(headerpadsz);
4871 ret |= _verify_back_channel_attr(max_rqst_sz);
4872 ret |= _verify_back_channel_attr(max_resp_sz);
4873 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4874 ret |= _verify_back_channel_attr(max_ops);
4875 ret |= _verify_back_channel_attr(max_reqs);
4876
4877 return ret;
4878}
4879
fc931582
AA		 4880static int _nfs4_proc_create_session(struct nfs_client *clp)
4881{
4882 struct nfs4_session *session = clp->cl_session;
4883 struct nfs41_create_session_args args = {
4884 .client = clp,
4885 .cb_program = NFS4_CALLBACK,
4886 };
4887 struct nfs41_create_session_res res = {
4888 .client = clp,
4889 };
4890 struct rpc_message msg = {
4891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4892 .rpc_argp = &args,
4893 .rpc_resp = &res,
4894 };
4895 int status;
4896
4897 nfs4_init_channel_attrs(&args);
0f91421e 4898 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4899
4900 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4901
8d35301d
AA		 4902 if (!status)
4903 /* Verify the session's negotiated channel_attrs values */
4904 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4905 if (!status) {
4906 /* Increment the clientid slot sequence id */
4907 clp->cl_seqid++;
4908 }
4909
4910 return status;
4911}
4912
4913/*
4914 * Issues a CREATE_SESSION operation to the server.
4915 * It is the responsibility of the caller to verify the session is
4916 * expired before calling this routine.
4917 */
f26468fb 4918int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4919{
4920 int status;
4921 unsigned *ptr;
fc931582
AA		 4922 struct nfs4_session *session = clp->cl_session;
4923
4924 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4925
4926 status = _nfs4_proc_create_session(clp);
4927 if (status)
4928 goto out;
4929
f26468fb
TM		 4930 /* Init and reset the fore channel */
4931 status = nfs4_init_slot_tables(session);
4932 dprintk("slot table initialization returned %d\n", status);
4933 if (status)
4934 goto out;
4935 status = nfs4_reset_slot_tables(session);
4936 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4937 if (status)
4938 goto out;
4939
4940 ptr = (unsigned *)&session->sess_id.data[0];
4941 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4942 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4943out:
4944 dprintk("<-- %s\n", __func__);
4945 return status;
4946}
4947
0f3e66c6
AA		 4948/*
4949 * Issue the over-the-wire RPC DESTROY_SESSION.
4950 * The caller must serialize access to this routine.
4951 */
4952int nfs4_proc_destroy_session(struct nfs4_session *session)
4953{
4954 int status = 0;
4955 struct rpc_message msg;
4956
4957 dprintk("--> nfs4_proc_destroy_session\n");
4958
4959 /* session is still being setup */
4960 if (session->clp->cl_cons_state != NFS_CS_READY)
4961 return status;
4962
4963 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4964 msg.rpc_argp = session;
4965 msg.rpc_resp = NULL;
4966 msg.rpc_cred = NULL;
4967 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4968
4969 if (status)
4970 printk(KERN_WARNING
4971 "Got error %d from the server on DESTROY_SESSION. "
4972 "Session has been destroyed regardless...\n", status);
4973
4974 dprintk("<-- nfs4_proc_destroy_session\n");
4975 return status;
4976}
4977
fccba804
TM		 4978int nfs4_init_session(struct nfs_server *server)
4979{
4980 struct nfs_client *clp = server->nfs_client;
2449ea2e 4981 struct nfs4_session *session;
68bf05ef 4982 unsigned int rsize, wsize;
fccba804
TM		 4983 int ret;
4984
4985 if (!nfs4_has_session(clp))
4986 return 0;
4987
68bf05ef
AA		 4988 rsize = server->rsize;
4989 if (rsize == 0)
4990 rsize = NFS_MAX_FILE_IO_SIZE;
4991 wsize = server->wsize;
4992 if (wsize == 0)
4993 wsize = NFS_MAX_FILE_IO_SIZE;
4994
2449ea2e 4995 session = clp->cl_session;
68bf05ef
AA		 4996 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
4997 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 4998
fccba804
TM		 4999 ret = nfs4_recover_expired_lease(server);
5000 if (!ret)
5001 ret = nfs4_check_client_ready(clp);
5002 return ret;
5003}
5004
fc01cea9
AA		 5005/*
5006 * Renew the cl_session lease.
5007 */
5008static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5009{
5010 struct nfs4_sequence_args args;
5011 struct nfs4_sequence_res res;
5012
5013 struct rpc_message msg = {
5014 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5015 .rpc_argp = &args,
5016 .rpc_resp = &res,
5017 .rpc_cred = cred,
5018 };
5019
5020 args.sa_cache_this = 0;
5021
5022 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
b257957e 5023 &res, args.sa_cache_this, 1);
fc01cea9
AA		 5024}
5025
5026void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5027{
5028 struct nfs_client *clp = (struct nfs_client *)data;
5029
5030 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
5031
5032 if (task->tk_status < 0) {
5033 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5034
5035 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
5036 == -EAGAIN) {
0110ee15 5037 nfs_restart_rpc(task, clp);
fc01cea9
AA		 5038 return;
5039 }
5040 }
fc01cea9
AA		 5041 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5042
fc01cea9
AA		 5043 kfree(task->tk_msg.rpc_argp);
5044 kfree(task->tk_msg.rpc_resp);
5045
5046 dprintk("<-- %s\n", __func__);
5047}
5048
5049static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5050{
5051 struct nfs_client *clp;
5052 struct nfs4_sequence_args *args;
5053 struct nfs4_sequence_res *res;
5054
5055 clp = (struct nfs_client *)data;
5056 args = task->tk_msg.rpc_argp;
5057 res = task->tk_msg.rpc_resp;
5058
5059 if (nfs4_setup_sequence(clp, args, res, 0, task))
5060 return;
5061 rpc_call_start(task);
5062}
5063
5064static const struct rpc_call_ops nfs41_sequence_ops = {
5065 .rpc_call_done = nfs41_sequence_call_done,
5066 .rpc_call_prepare = nfs41_sequence_prepare,
5067};
5068
5069static int nfs41_proc_async_sequence(struct nfs_client *clp,
5070 struct rpc_cred *cred)
5071{
5072 struct nfs4_sequence_args *args;
5073 struct nfs4_sequence_res *res;
5074 struct rpc_message msg = {
5075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5076 .rpc_cred = cred,
5077 };
5078
5079 args = kzalloc(sizeof(*args), GFP_KERNEL);
5080 if (!args)
5081 return -ENOMEM;
5082 res = kzalloc(sizeof(*res), GFP_KERNEL);
5083 if (!res) {
5084 kfree(args);
5085 return -ENOMEM;
5086 }
5087 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
5088 msg.rpc_argp = args;
5089 msg.rpc_resp = res;
5090
5091 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
5092 &nfs41_sequence_ops, (void *)clp);
5093}
5094
fce5c838
RL		 5095struct nfs4_reclaim_complete_data {
5096 struct nfs_client *clp;
5097 struct nfs41_reclaim_complete_args arg;
5098 struct nfs41_reclaim_complete_res res;
5099};
5100
5101static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5102{
5103 struct nfs4_reclaim_complete_data *calldata = data;
5104
b257957e 5105 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
fce5c838
RL		 5106 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
5107 &calldata->res.seq_res, 0, task))
5108 return;
5109
5110 rpc_call_start(task);
5111}
5112
5113static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5114{
5115 struct nfs4_reclaim_complete_data *calldata = data;
5116 struct nfs_client *clp = calldata->clp;
5117 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5118
5119 dprintk("--> %s\n", __func__);
5120 nfs41_sequence_done(clp, res, task->tk_status);
5121 switch (task->tk_status) {
5122 case 0:
5123 case -NFS4ERR_COMPLETE_ALREADY:
5124 break;
5125 case -NFS4ERR_BADSESSION:
5126 case -NFS4ERR_DEADSESSION:
5127 /*
5128 * Handle the session error, but do not retry the operation, as
5129 * we have no way of telling whether the clientid had to be
5130 * reset before we got our reply. If reset, a new wave of
5131 * reclaim operations will follow, containing their own reclaim
5132 * complete. We don't want our retry to get on the way of
5133 * recovery by incorrectly indicating to the server that we're
5134 * done reclaiming state since the process had to be restarted.
5135 */
5136 _nfs4_async_handle_error(task, NULL, clp, NULL);
5137 break;
5138 default:
5139 if (_nfs4_async_handle_error(
5140 task, NULL, clp, NULL) == -EAGAIN) {
5141 rpc_restart_call_prepare(task);
5142 return;
5143 }
5144 }
fce5c838
RL		 5145
5146 dprintk("<-- %s\n", __func__);
5147}
5148
5149static void nfs4_free_reclaim_complete_data(void *data)
5150{
5151 struct nfs4_reclaim_complete_data *calldata = data;
5152
5153 kfree(calldata);
5154}
5155
5156static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5157 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5158 .rpc_call_done = nfs4_reclaim_complete_done,
5159 .rpc_release = nfs4_free_reclaim_complete_data,
5160};
5161
5162/*
5163 * Issue a global reclaim complete.
5164 */
5165static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5166{
5167 struct nfs4_reclaim_complete_data *calldata;
5168 struct rpc_task *task;
5169 struct rpc_message msg = {
5170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5171 };
5172 struct rpc_task_setup task_setup_data = {
5173 .rpc_client = clp->cl_rpcclient,
5174 .rpc_message = &msg,
5175 .callback_ops = &nfs4_reclaim_complete_call_ops,
5176 .flags = RPC_TASK_ASYNC,
5177 };
5178 int status = -ENOMEM;
5179
5180 dprintk("--> %s\n", __func__);
5181 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5182 if (calldata == NULL)
5183 goto out;
5184 calldata->clp = clp;
5185 calldata->arg.one_fs = 0;
5186 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5187
5188 msg.rpc_argp = &calldata->arg;
5189 msg.rpc_resp = &calldata->res;
5190 task_setup_data.callback_data = calldata;
5191 task = rpc_run_task(&task_setup_data);
5192 if (IS_ERR(task))
5193 status = PTR_ERR(task);
5194 rpc_put_task(task);
5195out:
5196 dprintk("<-- %s status=%d\n", __func__, status);
5197 return status;
5198}
557134a3
AA		 5199#endif /* CONFIG_NFS_V4_1 */
5200
591d71cb 5201struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5202 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5203 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5204 .recover_open = nfs4_open_reclaim,
5205 .recover_lock = nfs4_lock_reclaim,
591d71cb 5206 .establish_clid = nfs4_init_clientid,
90a16617 5207 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5208};
5209
591d71cb
AA		 5210#if defined(CONFIG_NFS_V4_1)
5211struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5212 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5213 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5214 .recover_open = nfs4_open_reclaim,
5215 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5216 .establish_clid = nfs41_init_clientid,
b4b82607 5217 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5218 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5219};
5220#endif /* CONFIG_NFS_V4_1 */
5221
5222struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5223 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5224 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5225 .recover_open = nfs4_open_expired,
5226 .recover_lock = nfs4_lock_expired,
5227 .establish_clid = nfs4_init_clientid,
90a16617 5228 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5229};
5230
5231#if defined(CONFIG_NFS_V4_1)
5232struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5233 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5234 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5235 .recover_open = nfs4_open_expired,
5236 .recover_lock = nfs4_lock_expired,
4d643d1d 5237 .establish_clid = nfs41_init_clientid,
b4b82607 5238 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5239};
591d71cb 5240#endif /* CONFIG_NFS_V4_1 */
1da177e4 5241
29fba38b
BH		 5242struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5243 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5244 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5245 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5246};
5247
5248#if defined(CONFIG_NFS_V4_1)
5249struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5250 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5251 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5252 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5253};
5254#endif
5255
5256/*
5257 * Per minor version reboot and network partition recovery ops
5258 */
5259
591d71cb
AA		 5260struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5261 &nfs40_reboot_recovery_ops,
5262#if defined(CONFIG_NFS_V4_1)
5263 &nfs41_reboot_recovery_ops,
5264#endif
5265};
5266
5267struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5268 &nfs40_nograce_recovery_ops,
5269#if defined(CONFIG_NFS_V4_1)
5270 &nfs41_nograce_recovery_ops,
5271#endif
5272};
5273
29fba38b
BH		 5274struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5275 &nfs40_state_renewal_ops,
5276#if defined(CONFIG_NFS_V4_1)
5277 &nfs41_state_renewal_ops,
5278#endif
5279};
5280
92e1d5be 5281static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5282 .permission = nfs_permission,
5283 .getattr = nfs_getattr,
5284 .setattr = nfs_setattr,
5285 .getxattr = nfs4_getxattr,
5286 .setxattr = nfs4_setxattr,
5287 .listxattr = nfs4_listxattr,
5288};
5289
509de811 5290const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5291 .version = 4, /* protocol version */
5292 .dentry_ops = &nfs4_dentry_operations,
5293 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5294 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5295 .getroot = nfs4_proc_get_root,
5296 .getattr = nfs4_proc_getattr,
5297 .setattr = nfs4_proc_setattr,
2b3de441 5298 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5299 .lookup = nfs4_proc_lookup,
5300 .access = nfs4_proc_access,
5301 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5302 .create = nfs4_proc_create,
5303 .remove = nfs4_proc_remove,
5304 .unlink_setup = nfs4_proc_unlink_setup,
5305 .unlink_done = nfs4_proc_unlink_done,
5306 .rename = nfs4_proc_rename,
5307 .link = nfs4_proc_link,
5308 .symlink = nfs4_proc_symlink,
5309 .mkdir = nfs4_proc_mkdir,
5310 .rmdir = nfs4_proc_remove,
5311 .readdir = nfs4_proc_readdir,
5312 .mknod = nfs4_proc_mknod,
5313 .statfs = nfs4_proc_statfs,
5314 .fsinfo = nfs4_proc_fsinfo,
5315 .pathconf = nfs4_proc_pathconf,
e9326dca 5316 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5317 .decode_dirent = nfs4_decode_dirent,
5318 .read_setup = nfs4_proc_read_setup,
ec06c096 5319 .read_done = nfs4_read_done,
1da177e4 5320 .write_setup = nfs4_proc_write_setup,
788e7a89 5321 .write_done = nfs4_write_done,
1da177e4 5322 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5323 .commit_done = nfs4_commit_done,
1da177e4 5324 .lock = nfs4_proc_lock,
e50a1c2e 5325 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5326 .close_context = nfs4_close_context,
1da177e4
LT		 5327};
5328
5329/*
5330 * Local variables:
5331 * c-basic-offset: 8
5332 * End:
5333 */
Linux 6.x block layer and io_uring tree(s)