projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFS: Avoid PUTROOTFH when managing leases
[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>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 80static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 81static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 82static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
f062eb6c 85#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 86static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
87static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 88#endif
1da177e4 89/* Prevent leaks of NFSv4 errors into userland */
46f72f57 90static int nfs4_map_errors(int err)
1da177e4 91{
52567b03
TM		 92 if (err >= -1000)
93 return err;
94 switch (err) {
95 case -NFS4ERR_RESOURCE:
30005121
WAA		 96 case -NFS4ERR_LAYOUTTRYLATER:
97 case -NFS4ERR_RECALLCONFLICT:
52567b03 98 return -EREMOTEIO;
7ebb9315
BS		 99 case -NFS4ERR_WRONGSEC:
100 return -EPERM;
3ddeb7c5
TM		 101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
103 return -EINVAL;
fb13bfa7
TM		 104 case -NFS4ERR_SHARE_DENIED:
105 return -EACCES;
f25efd85
SD		 106 case -NFS4ERR_MINOR_VERS_MISMATCH:
107 return -EPROTONOSUPPORT;
6168f62c
WAA		 108 case -NFS4ERR_ACCESS:
109 return -EACCES;
6e3cf241
TM		 110 case -NFS4ERR_FILE_OPEN:
111 return -EBUSY;
52567b03 112 default:
1da177e4 113 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 114 __func__, -err);
52567b03 115 break;
1da177e4 116 }
52567b03 117 return -EIO;
1da177e4
LT		 118}
119
120/*
121 * This is our standard bitmap for GETATTR requests.
122 */
1549210f 123const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 124 FATTR4_WORD0_TYPE
125 | FATTR4_WORD0_CHANGE
126 | FATTR4_WORD0_SIZE
127 | FATTR4_WORD0_FSID
128 | FATTR4_WORD0_FILEID,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138};
139
1549210f
TM		 140static const u32 nfs4_pnfs_open_bitmap[3] = {
141 FATTR4_WORD0_TYPE
142 | FATTR4_WORD0_CHANGE
143 | FATTR4_WORD0_SIZE
144 | FATTR4_WORD0_FSID
145 | FATTR4_WORD0_FILEID,
146 FATTR4_WORD1_MODE
147 | FATTR4_WORD1_NUMLINKS
148 | FATTR4_WORD1_OWNER
149 | FATTR4_WORD1_OWNER_GROUP
150 | FATTR4_WORD1_RAWDEV
151 | FATTR4_WORD1_SPACE_USED
152 | FATTR4_WORD1_TIME_ACCESS
153 | FATTR4_WORD1_TIME_METADATA
154 | FATTR4_WORD1_TIME_MODIFY,
155 FATTR4_WORD2_MDSTHRESHOLD
156};
157
e23008ec
AA		 158static const u32 nfs4_open_noattr_bitmap[3] = {
159 FATTR4_WORD0_TYPE
160 | FATTR4_WORD0_CHANGE
161 | FATTR4_WORD0_FILEID,
162};
163
1da177e4
LT		 164const u32 nfs4_statfs_bitmap[2] = {
165 FATTR4_WORD0_FILES_AVAIL
166 | FATTR4_WORD0_FILES_FREE
167 | FATTR4_WORD0_FILES_TOTAL,
168 FATTR4_WORD1_SPACE_AVAIL
169 | FATTR4_WORD1_SPACE_FREE
170 | FATTR4_WORD1_SPACE_TOTAL
171};
172
4ce79717 173const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 174 FATTR4_WORD0_MAXLINK
175 | FATTR4_WORD0_MAXNAME,
176 0
177};
178
dae100c2 179const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 180 | FATTR4_WORD0_MAXREAD
181 | FATTR4_WORD0_MAXWRITE
182 | FATTR4_WORD0_LEASE_TIME,
55b6e774 183 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 184 | FATTR4_WORD1_FS_LAYOUT_TYPES,
185 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 186};
187
830b8e33
MN		 188const u32 nfs4_fs_locations_bitmap[2] = {
189 FATTR4_WORD0_TYPE
190 | FATTR4_WORD0_CHANGE
191 | FATTR4_WORD0_SIZE
192 | FATTR4_WORD0_FSID
193 | FATTR4_WORD0_FILEID
194 | FATTR4_WORD0_FS_LOCATIONS,
195 FATTR4_WORD1_MODE
196 | FATTR4_WORD1_NUMLINKS
197 | FATTR4_WORD1_OWNER
198 | FATTR4_WORD1_OWNER_GROUP
199 | FATTR4_WORD1_RAWDEV
200 | FATTR4_WORD1_SPACE_USED
201 | FATTR4_WORD1_TIME_ACCESS
202 | FATTR4_WORD1_TIME_METADATA
203 | FATTR4_WORD1_TIME_MODIFY
204 | FATTR4_WORD1_MOUNTED_ON_FILEID
205};
206
bc4785cd 207static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 208 struct nfs4_readdir_arg *readdir)
209{
0dbb4c67 210 __be32 *start, *p;
1da177e4 211
1da177e4 212 if (cookie > 2) {
b7ef1956 213 readdir->cookie = cookie;
1da177e4
LT		 214 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
215 return;
216 }
217
218 readdir->cookie = 0;
219 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
220 if (cookie == 2)
221 return;
222
223 /*
224 * NFSv4 servers do not return entries for '.' and '..'
225 * Therefore, we fake these entries here. We let '.'
226 * have cookie 0 and '..' have cookie 1. Note that
227 * when talking to the server, we always send cookie 0
228 * instead of 1 or 2.
229 */
2b86ce2d 230 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 231
232 if (cookie == 0) {
233 *p++ = xdr_one; /* next */
234 *p++ = xdr_zero; /* cookie, first word */
235 *p++ = xdr_one; /* cookie, second word */
236 *p++ = xdr_one; /* entry len */
237 memcpy(p, ".\0\0\0", 4); /* entry */
238 p++;
239 *p++ = xdr_one; /* bitmap length */
240 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
241 *p++ = htonl(8); /* attribute buffer length */
4e769b93 242 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 243 }
244
245 *p++ = xdr_one; /* next */
246 *p++ = xdr_zero; /* cookie, first word */
247 *p++ = xdr_two; /* cookie, second word */
248 *p++ = xdr_two; /* entry len */
249 memcpy(p, "..\0\0", 4); /* entry */
250 p++;
251 *p++ = xdr_one; /* bitmap length */
252 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
253 *p++ = htonl(8); /* attribute buffer length */
4e769b93 254 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 255
256 readdir->pgbase = (char *)p - (char *)start;
257 readdir->count -= readdir->pgbase;
2b86ce2d 258 kunmap_atomic(start);
1da177e4
LT		 259}
260
65de872e
TM		 261static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
262{
263 int res = 0;
264
265 might_sleep();
266
267 if (*timeout <= 0)
268 *timeout = NFS4_POLL_RETRY_MIN;
269 if (*timeout > NFS4_POLL_RETRY_MAX)
270 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 271 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 272 if (fatal_signal_pending(current))
273 res = -ERESTARTSYS;
274 *timeout <<= 1;
275 return res;
276}
277
278/* This is the error handling routine for processes that are allowed
279 * to sleep.
280 */
b064eca2 281static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 282{
283 struct nfs_client *clp = server->nfs_client;
9e33bed5 284 struct nfs4_state *state = exception->state;
3114ea7a 285 struct inode *inode = exception->inode;
65de872e
TM		 286 int ret = errorcode;
287
288 exception->retry = 0;
289 switch(errorcode) {
290 case 0:
291 return 0;
3114ea7a 292 case -NFS4ERR_OPENMODE:
011e2a7f 293 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 294 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 295 exception->retry = 1;
296 return 0;
297 }
298 if (state == NULL)
299 break;
5d422301
TM		 300 ret = nfs4_schedule_stateid_recovery(server, state);
301 if (ret < 0)
302 break;
3114ea7a 303 goto wait_on_recovery;
a1d0b5ee 304 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 305 case -NFS4ERR_ADMIN_REVOKED:
306 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 307 if (state == NULL)
308 break;
14977489 309 nfs_remove_bad_delegation(state->inode);
5d422301
TM		 310 ret = nfs4_schedule_stateid_recovery(server, state);
311 if (ret < 0)
312 break;
0400a6b0 313 goto wait_on_recovery;
0ced63d1 314 case -NFS4ERR_EXPIRED:
5d422301
TM		 315 if (state != NULL) {
316 ret = nfs4_schedule_stateid_recovery(server, state);
317 if (ret < 0)
318 break;
319 }
65de872e 320 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 321 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 322 nfs4_schedule_lease_recovery(clp);
323 goto wait_on_recovery;
03391693 324#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 325 case -NFS4ERR_BADSESSION:
326 case -NFS4ERR_BADSLOT:
327 case -NFS4ERR_BAD_HIGH_SLOT:
328 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
329 case -NFS4ERR_DEADSESSION:
330 case -NFS4ERR_SEQ_FALSE_RETRY:
331 case -NFS4ERR_SEQ_MISORDERED:
332 dprintk("%s ERROR: %d Reset session\n", __func__,
333 errorcode);
9f594791 334 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 335 goto wait_on_recovery;
03391693 336#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 337 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 338 if (exception->timeout > HZ) {
339 /* We have retried a decent amount, time to
340 * fail
341 */
342 ret = -EBUSY;
343 break;
344 }
65de872e
TM		 345 case -NFS4ERR_GRACE:
346 case -NFS4ERR_DELAY:
347 ret = nfs4_delay(server->client, &exception->timeout);
348 if (ret != 0)
349 break;
a8a4ae3a 350 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 351 case -NFS4ERR_OLD_STATEID:
352 exception->retry = 1;
b064eca2
TM		 353 break;
354 case -NFS4ERR_BADOWNER:
355 /* The following works around a Linux server bug! */
356 case -NFS4ERR_BADNAME:
357 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
358 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
359 exception->retry = 1;
360 printk(KERN_WARNING "NFS: v4 server %s "
361 "does not accept raw "
362 "uid/gids. "
363 "Reenabling the idmapper.\n",
364 server->nfs_client->cl_hostname);
365 }
65de872e
TM		 366 }
367 /* We failed to handle the error */
368 return nfs4_map_errors(ret);
0400a6b0 369wait_on_recovery:
a2c0b9e2
TM		 370 ret = nfs4_wait_clnt_recover(clp);
371 if (ret == 0)
372 exception->retry = 1;
373 return ret;
65de872e
TM		 374}
375
376
452e9352 377static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 378{
1da177e4
LT		 379 spin_lock(&clp->cl_lock);
380 if (time_before(clp->cl_last_renewal,timestamp))
381 clp->cl_last_renewal = timestamp;
382 spin_unlock(&clp->cl_lock);
383}
384
452e9352
TM		 385static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
386{
387 do_renew_lease(server->nfs_client, timestamp);
388}
389
cccef3b9
AA		 390#if defined(CONFIG_NFS_V4_1)
391
d185a334 392static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 393{
e3725ec0 394 struct nfs4_session *session;
13615871 395 struct nfs4_slot_table *tbl;
c10e4498 396 bool send_new_highest_used_slotid = false;
13615871 397
dfb4f309 398 if (!res->sr_slot) {
13615871
AA		 399 /* just wake up the next guy waiting since
400 * we may have not consumed a slot after all */
691daf3b 401 dprintk("%s: No slot\n", __func__);
35dc1d74 402 return;
13615871 403 }
e3725ec0
TM		 404 tbl = res->sr_slot->table;
405 session = tbl->session;
ea028ac9 406
35dc1d74 407 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 408 /* Be nice to the server: try to ensure that the last transmitted
409 * value for highest_user_slotid <= target_highest_slotid
410 */
411 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
412 send_new_highest_used_slotid = true;
413
b75ad4cd
TM		 414 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
415 send_new_highest_used_slotid = false;
416 goto out_unlock;
417 }
f4af6e2a 418 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 419
420 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
421 send_new_highest_used_slotid = false;
b75ad4cd 422out_unlock:
35dc1d74 423 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 424 res->sr_slot = NULL;
c10e4498
TM		 425 if (send_new_highest_used_slotid)
426 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 427}
428
14516c3a 429static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 430{
e3725ec0 431 struct nfs4_session *session;
933602e3 432 struct nfs4_slot *slot;
14516c3a 433 struct nfs_client *clp;
ac20d163 434 bool interrupted = false;
85563073 435 int ret = 1;
b0df806c 436
468f8613
BS		 437 /* don't increment the sequence number if the task wasn't sent */
438 if (!RPC_WAS_SENT(task))
b0df806c
AA		 439 goto out;
440
933602e3 441 slot = res->sr_slot;
e3725ec0 442 session = slot->table->session;
933602e3 443
ac20d163
TM		 444 if (slot->interrupted) {
445 slot->interrupted = 0;
446 interrupted = true;
447 }
448
691daf3b 449 /* Check the SEQUENCE operation status */
14516c3a
TM		 450 switch (res->sr_status) {
451 case 0:
b0df806c 452 /* Update the slot's sequence and clientid lease timer */
933602e3 453 ++slot->seq_nr;
e3725ec0 454 clp = session->clp;
8e63b6a8 455 do_renew_lease(clp, res->sr_timestamp);
0629e370 456 /* Check sequence flags */
b4410c2f
TM		 457 if (res->sr_status_flags != 0)
458 nfs4_schedule_lease_recovery(clp);
464ee9f9 459 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 460 break;
ac20d163
TM		 461 case 1:
462 /*
463 * sr_status remains 1 if an RPC level error occurred.
464 * The server may or may not have processed the sequence
465 * operation..
466 * Mark the slot as having hosted an interrupted RPC call.
467 */
468 slot->interrupted = 1;
469 goto out;
14516c3a
TM		 470 case -NFS4ERR_DELAY:
471 /* The server detected a resend of the RPC call and
472 * returned NFS4ERR_DELAY as per Section 2.10.6.2
473 * of RFC5661.
474 */
df2fabff 475 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 476 __func__,
df2fabff 477 slot->slot_nr,
933602e3 478 slot->seq_nr);
14516c3a 479 goto out_retry;
85563073
TM		 480 case -NFS4ERR_BADSLOT:
481 /*
482 * The slot id we used was probably retired. Try again
483 * using a different slot id.
484 */
e8794440
TM		 485 goto retry_nowait;
486 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 487 /*
488 * Was the last operation on this sequence interrupted?
489 * If so, retry after bumping the sequence number.
490 */
491 if (interrupted) {
492 ++slot->seq_nr;
493 goto retry_nowait;
494 }
e8794440
TM		 495 /*
496 * Could this slot have been previously retired?
497 * If so, then the server may be expecting seq_nr = 1!
498 */
8e63b6a8
TM		 499 if (slot->seq_nr != 1) {
500 slot->seq_nr = 1;
501 goto retry_nowait;
502 }
503 break;
e8794440
TM		 504 case -NFS4ERR_SEQ_FALSE_RETRY:
505 ++slot->seq_nr;
506 goto retry_nowait;
14516c3a
TM		 507 default:
508 /* Just update the slot sequence no. */
933602e3 509 ++slot->seq_nr;
b0df806c
AA		 510 }
511out:
512 /* The session may be reset by one of the error handlers. */
513 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 514 nfs41_sequence_free_slot(res);
85563073 515 return ret;
e8794440
TM		 516retry_nowait:
517 if (rpc_restart_call_prepare(task)) {
518 task->tk_status = 0;
519 ret = 0;
520 }
521 goto out;
14516c3a 522out_retry:
d05dd4e9 523 if (!rpc_restart_call(task))
14516c3a
TM		 524 goto out;
525 rpc_delay(task, NFS4_POLL_RETRY_MAX);
526 return 0;
b0df806c
AA		 527}
528
14516c3a
TM		 529static int nfs4_sequence_done(struct rpc_task *task,
530 struct nfs4_sequence_res *res)
df896455 531{
e3725ec0 532 if (res->sr_slot == NULL)
14516c3a
TM		 533 return 1;
534 return nfs41_sequence_done(task, res);
df896455
TM		 535}
536
9d12b216
TM		 537static void nfs41_init_sequence(struct nfs4_sequence_args *args,
538 struct nfs4_sequence_res *res, int cache_reply)
539{
2b2fa717 540 args->sa_slot = NULL;
9d12b216 541 args->sa_cache_this = 0;
8fe72bac 542 args->sa_privileged = 0;
9d12b216
TM		 543 if (cache_reply)
544 args->sa_cache_this = 1;
9d12b216
TM		 545 res->sr_slot = NULL;
546}
547
8fe72bac
TM		 548static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
549{
550 args->sa_privileged = 1;
551}
552
dc70d7b3 553int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 554 struct nfs4_sequence_args *args,
555 struct nfs4_sequence_res *res,
ce5039c1
AA		 556 struct rpc_task *task)
557{
fbcd4abc
AA		 558 struct nfs4_slot *slot;
559 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 560
561 dprintk("--> %s\n", __func__);
ce5039c1 562 /* slot already allocated? */
dfb4f309 563 if (res->sr_slot != NULL)
d9afbd1b 564 goto out_success;
ce5039c1 565
fbcd4abc
AA		 566 tbl = &session->fc_slot_table;
567
69d206b5
TM		 568 task->tk_timeout = 0;
569
fbcd4abc 570 spin_lock(&tbl->slot_tbl_lock);
a2118c33 571 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 572 !args->sa_privileged) {
0b1c8fc4 573 /* The state manager will wait until the slot table is empty */
0b1c8fc4 574 dprintk("%s session is draining\n", __func__);
7b939a3f 575 goto out_sleep;
689cf5c1
AB		 576 }
577
2dc03b7f 578 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 579 if (IS_ERR(slot)) {
580 /* If out of memory, try again in 1/4 second */
581 if (slot == ERR_PTR(-ENOMEM))
582 task->tk_timeout = HZ >> 2;
fbcd4abc 583 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 584 goto out_sleep;
fbcd4abc
AA		 585 }
586 spin_unlock(&tbl->slot_tbl_lock);
587
2b2fa717 588 args->sa_slot = slot;
fbcd4abc 589
2dc03b7f
TM		 590 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
591 slot->slot_nr, slot->seq_nr);
fbcd4abc 592
dfb4f309 593 res->sr_slot = slot;
8e63b6a8 594 res->sr_timestamp = jiffies;
2a6e26cd 595 res->sr_status_flags = 0;
fbcd4abc
AA		 596 /*
597 * sr_status is only set in decode_sequence, and so will remain
598 * set to 1 if an rpc level failure occurs.
599 */
600 res->sr_status = 1;
d9afbd1b
TM		 601out_success:
602 rpc_call_start(task);
ce5039c1 603 return 0;
7b939a3f 604out_sleep:
8fe72bac
TM		 605 /* Privileged tasks are queued with top priority */
606 if (args->sa_privileged)
1e1093c7
TM		 607 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
608 NULL, RPC_PRIORITY_PRIVILEGED);
609 else
610 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 611 spin_unlock(&tbl->slot_tbl_lock);
612 return -EAGAIN;
ce5039c1 613}
dc70d7b3 614EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 615
035168ab 616int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 617 struct nfs4_sequence_args *args,
618 struct nfs4_sequence_res *res,
ce5039c1
AA		 619 struct rpc_task *task)
620{
035168ab 621 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 622 int ret = 0;
623
d9afbd1b
TM		 624 if (session == NULL) {
625 rpc_call_start(task);
035168ab 626 goto out;
d9afbd1b 627 }
035168ab 628
df2fabff 629 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 630 __func__, session->clp, session, res->sr_slot ?
df2fabff 631 res->sr_slot->slot_nr : -1);
ce5039c1 632
9d12b216 633 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 634out:
635 dprintk("<-- %s status=%d\n", __func__, ret);
636 return ret;
637}
638
639struct nfs41_call_sync_data {
035168ab 640 const struct nfs_server *seq_server;
ce5039c1
AA		 641 struct nfs4_sequence_args *seq_args;
642 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 643};
644
645static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
646{
647 struct nfs41_call_sync_data *data = calldata;
6ba7db34 648 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 649
035168ab
TM		 650 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
651
d9afbd1b 652 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 653}
654
69ab40c4
AA		 655static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
656{
657 struct nfs41_call_sync_data *data = calldata;
658
14516c3a 659 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 660}
661
17280175 662static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 663 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 664 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 665};
666
7c513058
BS		 667static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
668 struct nfs_server *server,
ce5039c1
AA		 669 struct rpc_message *msg,
670 struct nfs4_sequence_args *args,
8fe72bac 671 struct nfs4_sequence_res *res)
ce5039c1
AA		 672{
673 int ret;
674 struct rpc_task *task;
675 struct nfs41_call_sync_data data = {
035168ab 676 .seq_server = server,
ce5039c1
AA		 677 .seq_args = args,
678 .seq_res = res,
ce5039c1
AA		 679 };
680 struct rpc_task_setup task_setup = {
7c513058 681 .rpc_client = clnt,
ce5039c1
AA		 682 .rpc_message = msg,
683 .callback_ops = &nfs41_call_sync_ops,
684 .callback_data = &data
685 };
686
ce5039c1
AA		 687 task = rpc_run_task(&task_setup);
688 if (IS_ERR(task))
689 ret = PTR_ERR(task);
690 else {
691 ret = task->tk_status;
692 rpc_put_task(task);
693 }
694 return ret;
695}
696
df896455 697#else
8fe72bac 698static
9d12b216
TM		 699void nfs41_init_sequence(struct nfs4_sequence_args *args,
700 struct nfs4_sequence_res *res, int cache_reply)
701{
702}
703
8fe72bac
TM		 704static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
705{
706}
707
708
14516c3a
TM		 709static int nfs4_sequence_done(struct rpc_task *task,
710 struct nfs4_sequence_res *res)
df896455 711{
14516c3a 712 return 1;
df896455 713}
cccef3b9
AA		 714#endif /* CONFIG_NFS_V4_1 */
715
fd0c0953 716static
7c513058
BS		 717int _nfs4_call_sync(struct rpc_clnt *clnt,
718 struct nfs_server *server,
cccef3b9
AA		 719 struct rpc_message *msg,
720 struct nfs4_sequence_args *args,
fd0c0953 721 struct nfs4_sequence_res *res)
cccef3b9 722{
7c513058 723 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 724}
725
fd0c0953 726static
7c513058
BS		 727int nfs4_call_sync(struct rpc_clnt *clnt,
728 struct nfs_server *server,
e73b83f2
BS		 729 struct rpc_message *msg,
730 struct nfs4_sequence_args *args,
731 struct nfs4_sequence_res *res,
732 int cache_reply)
733{
fd0c0953 734 nfs41_init_sequence(args, res, cache_reply);
7c513058 735 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 736 args, res);
e73b83f2 737}
cccef3b9 738
38478b24 739static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 740{
38478b24 741 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 742
38478b24 743 spin_lock(&dir->i_lock);
359d7d1c 744 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 745 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 746 nfs_force_lookup_revalidate(dir);
a9a4a87a 747 dir->i_version = cinfo->after;
de242c0b 748 nfs_fscache_invalidate(dir);
38478b24 749 spin_unlock(&dir->i_lock);
1da177e4
LT		 750}
751
e56e0b78 752struct nfs4_opendata {
c6d00e63 753 struct kref kref;
e56e0b78
TM		 754 struct nfs_openargs o_arg;
755 struct nfs_openres o_res;
cdd4e68b
TM		 756 struct nfs_open_confirmargs c_arg;
757 struct nfs_open_confirmres c_res;
6926afd1
TM		 758 struct nfs4_string owner_name;
759 struct nfs4_string group_name;
e56e0b78 760 struct nfs_fattr f_attr;
e56e0b78 761 struct dentry *dir;
82a2c1b7 762 struct dentry *dentry;
e56e0b78 763 struct nfs4_state_owner *owner;
aac00a8d 764 struct nfs4_state *state;
e56e0b78 765 struct iattr attrs;
26e976a8 766 unsigned long timestamp;
3e309914 767 unsigned int rpc_done : 1;
24ac23ab
TM		 768 int rpc_status;
769 int cancelled;
e56e0b78
TM		 770};
771
49f9a0fa
TM		 772static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
773 int err, struct nfs4_exception *exception)
774{
775 if (err != -EINVAL)
776 return false;
777 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
778 return false;
779 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
780 exception->retry = 1;
781 return true;
782}
783
784static enum open_claim_type4
785nfs4_map_atomic_open_claim(struct nfs_server *server,
786 enum open_claim_type4 claim)
787{
788 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
789 return claim;
790 switch (claim) {
791 default:
792 return claim;
793 case NFS4_OPEN_CLAIM_FH:
794 return NFS4_OPEN_CLAIM_NULL;
795 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
796 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
797 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
798 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
799 }
800}
2ced46c2
TM		 801
802static void nfs4_init_opendata_res(struct nfs4_opendata *p)
803{
804 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 805 p->o_res.seqid = p->o_arg.seqid;
806 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 807 p->o_res.server = p->o_arg.server;
5f657530 808 p->o_res.access_request = p->o_arg.access;
2ced46c2 809 nfs_fattr_init(&p->f_attr);
6926afd1 810 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 811}
812
82a2c1b7 813static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 814 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 815 const struct iattr *attrs,
4a1c0893 816 enum open_claim_type4 claim,
8535b2be 817 gfp_t gfp_mask)
e56e0b78 818{
82a2c1b7 819 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 820 struct inode *dir = parent->d_inode;
821 struct nfs_server *server = NFS_SERVER(dir);
822 struct nfs4_opendata *p;
823
8535b2be 824 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 825 if (p == NULL)
826 goto err;
8535b2be 827 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 828 if (p->o_arg.seqid == NULL)
829 goto err_free;
82a2c1b7
AV		 830 nfs_sb_active(dentry->d_sb);
831 p->dentry = dget(dentry);
e56e0b78
TM		 832 p->dir = parent;
833 p->owner = sp;
834 atomic_inc(&sp->so_count);
dc0b027d
TM		 835 p->o_arg.open_flags = flags;
836 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 837 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
838 * will return permission denied for all bits until close */
839 if (!(flags & O_EXCL)) {
840 /* ask server to check for all possible rights as results
841 * are cached */
842 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
843 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 844 }
7539bbab 845 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 846 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
847 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 848 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 849 p->o_arg.server = server;
850 p->o_arg.bitmask = server->attr_bitmask;
1549210f 851 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa
TM		 852 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
853 switch (p->o_arg.claim) {
4a1c0893
TM		 854 case NFS4_OPEN_CLAIM_NULL:
855 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
856 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
857 p->o_arg.fh = NFS_FH(dir);
858 break;
859 case NFS4_OPEN_CLAIM_PREVIOUS:
860 case NFS4_OPEN_CLAIM_FH:
861 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
862 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
863 p->o_arg.fh = NFS_FH(dentry->d_inode);
864 }
536e43d1 865 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 866 __be32 verf[2];
d77d76ff 867
e56e0b78
TM		 868 p->o_arg.u.attrs = &p->attrs;
869 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 870
871 verf[0] = jiffies;
872 verf[1] = current->pid;
873 memcpy(p->o_arg.u.verifier.data, verf,
874 sizeof(p->o_arg.u.verifier.data));
e56e0b78 875 }
cdd4e68b
TM		 876 p->c_arg.fh = &p->o_res.fh;
877 p->c_arg.stateid = &p->o_res.stateid;
878 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 879 nfs4_init_opendata_res(p);
c6d00e63 880 kref_init(&p->kref);
e56e0b78
TM		 881 return p;
882err_free:
883 kfree(p);
884err:
885 dput(parent);
886 return NULL;
887}
888
c6d00e63 889static void nfs4_opendata_free(struct kref *kref)
e56e0b78 890{
c6d00e63
TM		 891 struct nfs4_opendata *p = container_of(kref,
892 struct nfs4_opendata, kref);
82a2c1b7 893 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 894
895 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 896 if (p->state != NULL)
897 nfs4_put_open_state(p->state);
c6d00e63
TM		 898 nfs4_put_state_owner(p->owner);
899 dput(p->dir);
82a2c1b7
AV		 900 dput(p->dentry);
901 nfs_sb_deactive(sb);
6926afd1 902 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 903 kfree(p);
904}
905
906static void nfs4_opendata_put(struct nfs4_opendata *p)
907{
908 if (p != NULL)
909 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 910}
911
06f814a3
TM		 912static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
913{
06f814a3
TM		 914 int ret;
915
06f814a3 916 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 917 return ret;
918}
919
dc0b027d 920static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 921{
922 int ret = 0;
dc0b027d 923
536e43d1 924 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 925 goto out;
926 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 927 case FMODE_READ:
88069f77
TM		 928 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
929 && state->n_rdonly != 0;
6ee41268
TM		 930 break;
931 case FMODE_WRITE:
88069f77
TM		 932 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
933 && state->n_wronly != 0;
6ee41268
TM		 934 break;
935 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 936 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
937 && state->n_rdwr != 0;
6ee41268 938 }
dc0b027d 939out:
6ee41268
TM		 940 return ret;
941}
942
dc0b027d 943static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 944{
652f89f6
TM		 945 if (delegation == NULL)
946 return 0;
dc0b027d 947 if ((delegation->type & fmode) != fmode)
aac00a8d 948 return 0;
15c831bf 949 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 950 return 0;
d25be546
TM		 951 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
952 return 0;
b7391f44 953 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 954 return 1;
955}
956
dc0b027d 957static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 958{
dc0b027d 959 switch (fmode) {
e7616923
TM		 960 case FMODE_WRITE:
961 state->n_wronly++;
962 break;
963 case FMODE_READ:
964 state->n_rdonly++;
965 break;
966 case FMODE_READ|FMODE_WRITE:
967 state->n_rdwr++;
968 }
dc0b027d 969 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 970}
971
dc0b027d 972static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 973{
974 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 975 nfs4_stateid_copy(&state->stateid, stateid);
976 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 977 switch (fmode) {
003707c7
TM		 978 case FMODE_READ:
979 set_bit(NFS_O_RDONLY_STATE, &state->flags);
980 break;
981 case FMODE_WRITE:
982 set_bit(NFS_O_WRONLY_STATE, &state->flags);
983 break;
984 case FMODE_READ|FMODE_WRITE:
985 set_bit(NFS_O_RDWR_STATE, &state->flags);
986 }
e7616923
TM		 987}
988
dc0b027d 989static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 990{
8bda4e4c 991 write_seqlock(&state->seqlock);
dc0b027d 992 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 993 write_sequnlock(&state->seqlock);
003707c7
TM		 994}
995
dc0b027d 996static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 997{
8bda4e4c
TM		 998 /*
999 * Protect the call to nfs4_state_set_mode_locked and
1000 * serialise the stateid update
1001 */
1002 write_seqlock(&state->seqlock);
003707c7 1003 if (deleg_stateid != NULL) {
f597c537 1004 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1005 set_bit(NFS_DELEGATED_STATE, &state->flags);
1006 }
1007 if (open_stateid != NULL)
dc0b027d 1008 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1009 write_sequnlock(&state->seqlock);
1010 spin_lock(&state->owner->so_lock);
dc0b027d 1011 update_open_stateflags(state, fmode);
ec073428 1012 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1013}
1014
dc0b027d 1015static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1016{
1017 struct nfs_inode *nfsi = NFS_I(state->inode);
1018 struct nfs_delegation *deleg_cur;
1019 int ret = 0;
1020
dc0b027d 1021 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1022
1023 rcu_read_lock();
1024 deleg_cur = rcu_dereference(nfsi->delegation);
1025 if (deleg_cur == NULL)
1026 goto no_delegation;
1027
1028 spin_lock(&deleg_cur->lock);
1029 if (nfsi->delegation != deleg_cur ||
d25be546 1030 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1031 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1032 goto no_delegation_unlock;
1033
1034 if (delegation == NULL)
1035 delegation = &deleg_cur->stateid;
f597c537 1036 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1037 goto no_delegation_unlock;
1038
b7391f44 1039 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1040 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1041 ret = 1;
1042no_delegation_unlock:
1043 spin_unlock(&deleg_cur->lock);
1044no_delegation:
1045 rcu_read_unlock();
1046
1047 if (!ret && open_stateid != NULL) {
dc0b027d 1048 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1049 ret = 1;
1050 }
1051
1052 return ret;
1053}
1054
1055
dc0b027d 1056static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1057{
1058 struct nfs_delegation *delegation;
1059
1060 rcu_read_lock();
1061 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1062 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1063 rcu_read_unlock();
1064 return;
1065 }
1066 rcu_read_unlock();
57ec14c5 1067 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1068}
1069
6ee41268 1070static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1071{
1072 struct nfs4_state *state = opendata->state;
1073 struct nfs_inode *nfsi = NFS_I(state->inode);
1074 struct nfs_delegation *delegation;
536e43d1 1075 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1076 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1077 nfs4_stateid stateid;
1078 int ret = -EAGAIN;
1079
aac00a8d 1080 for (;;) {
dc0b027d 1081 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1082 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1083 if (can_open_cached(state, fmode, open_mode)) {
1084 update_open_stateflags(state, fmode);
6ee41268 1085 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1086 goto out_return_state;
1087 }
1088 spin_unlock(&state->owner->so_lock);
1089 }
34310430
TM		 1090 rcu_read_lock();
1091 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1092 if (!can_open_delegated(delegation, fmode)) {
34310430 1093 rcu_read_unlock();
aac00a8d 1094 break;
34310430 1095 }
aac00a8d 1096 /* Save the delegation */
f597c537 1097 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1098 rcu_read_unlock();
af22f94a 1099 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1100 if (ret != 0)
1101 goto out;
1102 ret = -EAGAIN;
34310430
TM		 1103
1104 /* Try to update the stateid using the delegation */
dc0b027d 1105 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1106 goto out_return_state;
aac00a8d 1107 }
aac00a8d
TM		 1108out:
1109 return ERR_PTR(ret);
1110out_return_state:
1111 atomic_inc(&state->count);
1112 return state;
1113}
1114
e23008ec
AA		 1115static void
1116nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1117{
1118 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1119 struct nfs_delegation *delegation;
1120 int delegation_flags = 0;
1121
1122 rcu_read_lock();
1123 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1124 if (delegation)
1125 delegation_flags = delegation->flags;
1126 rcu_read_unlock();
1127 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1128 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1129 "returning a delegation for "
1130 "OPEN(CLAIM_DELEGATE_CUR)\n",
1131 clp->cl_hostname);
1132 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1133 nfs_inode_set_delegation(state->inode,
1134 data->owner->so_cred,
1135 &data->o_res);
1136 else
1137 nfs_inode_reclaim_delegation(state->inode,
1138 data->owner->so_cred,
1139 &data->o_res);
1140}
1141
1142/*
1143 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1144 * and update the nfs4_state.
1145 */
1146static struct nfs4_state *
1147_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1148{
1149 struct inode *inode = data->state->inode;
1150 struct nfs4_state *state = data->state;
1151 int ret;
1152
1153 if (!data->rpc_done) {
1154 ret = data->rpc_status;
1155 goto err;
1156 }
1157
1158 ret = -ESTALE;
1159 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1160 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1161 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1162 goto err;
1163
1164 ret = -ENOMEM;
1165 state = nfs4_get_open_state(inode, data->owner);
1166 if (state == NULL)
1167 goto err;
1168
1169 ret = nfs_refresh_inode(inode, &data->f_attr);
1170 if (ret)
1171 goto err;
1172
1173 if (data->o_res.delegation_type != 0)
1174 nfs4_opendata_check_deleg(data, state);
1175 update_open_stateid(state, &data->o_res.stateid, NULL,
1176 data->o_arg.fmode);
1177
1178 return state;
1179err:
1180 return ERR_PTR(ret);
1181
1182}
1183
1184static struct nfs4_state *
1185_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1186{
1187 struct inode *inode;
1188 struct nfs4_state *state = NULL;
1b370bc2 1189 int ret;
24ac23ab 1190
aac00a8d 1191 if (!data->rpc_done) {
6ee41268 1192 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1193 goto out;
1194 }
1195
1b370bc2 1196 ret = -EAGAIN;
24ac23ab 1197 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1198 goto err;
24ac23ab 1199 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1200 ret = PTR_ERR(inode);
03f28e3a 1201 if (IS_ERR(inode))
1b370bc2
TM		 1202 goto err;
1203 ret = -ENOMEM;
24ac23ab
TM		 1204 state = nfs4_get_open_state(inode, data->owner);
1205 if (state == NULL)
1b370bc2 1206 goto err_put_inode;
e23008ec
AA		 1207 if (data->o_res.delegation_type != 0)
1208 nfs4_opendata_check_deleg(data, state);
34310430 1209 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1210 data->o_arg.fmode);
24ac23ab 1211 iput(inode);
aac00a8d 1212out:
7aa262b5 1213 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1214 return state;
1b370bc2
TM		 1215err_put_inode:
1216 iput(inode);
1217err:
1218 return ERR_PTR(ret);
24ac23ab
TM		 1219}
1220
e23008ec
AA		 1221static struct nfs4_state *
1222nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1223{
1224 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1225 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1226 return _nfs4_opendata_to_nfs4_state(data);
1227}
1228
864472e9
TM		 1229static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1230{
1231 struct nfs_inode *nfsi = NFS_I(state->inode);
1232 struct nfs_open_context *ctx;
1233
1234 spin_lock(&state->inode->i_lock);
1235 list_for_each_entry(ctx, &nfsi->open_files, list) {
1236 if (ctx->state != state)
1237 continue;
1238 get_nfs_open_context(ctx);
1239 spin_unlock(&state->inode->i_lock);
1240 return ctx;
1241 }
1242 spin_unlock(&state->inode->i_lock);
1243 return ERR_PTR(-ENOENT);
1244}
1245
4a1c0893
TM		 1246static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1247 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1248{
1249 struct nfs4_opendata *opendata;
1250
4a1c0893
TM		 1251 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1252 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1253 if (opendata == NULL)
1254 return ERR_PTR(-ENOMEM);
1255 opendata->state = state;
1256 atomic_inc(&state->count);
1257 return opendata;
1258}
1259
dc0b027d 1260static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1261{
2ced46c2 1262 struct nfs4_state *newstate;
864472e9
TM		 1263 int ret;
1264
dc0b027d
TM		 1265 opendata->o_arg.open_flags = 0;
1266 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1267 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1268 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1269 nfs4_init_opendata_res(opendata);
b257957e 1270 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1271 if (ret != 0)
1272 return ret;
2ced46c2 1273 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1274 if (IS_ERR(newstate))
1275 return PTR_ERR(newstate);
643168c2 1276 nfs4_close_state(newstate, fmode);
2ced46c2 1277 *res = newstate;
864472e9
TM		 1278 return 0;
1279}
1280
1281static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1282{
864472e9 1283 struct nfs4_state *newstate;
864472e9
TM		 1284 int ret;
1285
1286 /* memory barrier prior to reading state->n_* */
2ced46c2 1287 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1288 smp_rmb();
1289 if (state->n_rdwr != 0) {
b0ed9dbc 1290 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1291 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1292 if (ret != 0)
1293 return ret;
2ced46c2
TM		 1294 if (newstate != state)
1295 return -ESTALE;
864472e9
TM		 1296 }
1297 if (state->n_wronly != 0) {
b0ed9dbc 1298 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1299 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1300 if (ret != 0)
1301 return ret;
2ced46c2
TM		 1302 if (newstate != state)
1303 return -ESTALE;
864472e9
TM		 1304 }
1305 if (state->n_rdonly != 0) {
b0ed9dbc 1306 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1307 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1308 if (ret != 0)
1309 return ret;
2ced46c2
TM		 1310 if (newstate != state)
1311 return -ESTALE;
864472e9 1312 }
1ac7e2fd
TM		 1313 /*
1314 * We may have performed cached opens for all three recoveries.
1315 * Check if we need to update the current stateid.
1316 */
1317 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1318 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1319 write_seqlock(&state->seqlock);
1ac7e2fd 1320 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1321 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1322 write_sequnlock(&state->seqlock);
1ac7e2fd 1323 }
864472e9
TM		 1324 return 0;
1325}
1326
1da177e4
LT		 1327/*
1328 * OPEN_RECLAIM:
1329 * reclaim state on the server after a reboot.
1da177e4 1330 */
539cd03a 1331static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1332{
1ac7e2fd 1333 struct nfs_delegation *delegation;
864472e9 1334 struct nfs4_opendata *opendata;
dc0b027d 1335 fmode_t delegation_type = 0;
1da177e4
LT		 1336 int status;
1337
4a1c0893
TM		 1338 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1339 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1340 if (IS_ERR(opendata))
1341 return PTR_ERR(opendata);
1ac7e2fd
TM		 1342 rcu_read_lock();
1343 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1344 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1345 delegation_type = delegation->type;
1ac7e2fd 1346 rcu_read_unlock();
864472e9
TM		 1347 opendata->o_arg.u.delegation_type = delegation_type;
1348 status = nfs4_open_recover(opendata, state);
c6d00e63 1349 nfs4_opendata_put(opendata);
1da177e4
LT		 1350 return status;
1351}
1352
539cd03a 1353static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1354{
1355 struct nfs_server *server = NFS_SERVER(state->inode);
1356 struct nfs4_exception exception = { };
1357 int err;
1358 do {
539cd03a 1359 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1360 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1361 continue;
168667c4 1362 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1363 break;
1364 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1365 } while (exception.retry);
1366 return err;
1367}
1368
864472e9
TM		 1369static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1370{
1371 struct nfs_open_context *ctx;
1372 int ret;
1373
1374 ctx = nfs4_state_find_open_context(state);
1375 if (IS_ERR(ctx))
91876b13 1376 return -EAGAIN;
539cd03a 1377 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1378 put_nfs_open_context(ctx);
1379 return ret;
1380}
1381
13437e12 1382static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1383{
e56e0b78 1384 struct nfs4_opendata *opendata;
864472e9 1385 int ret;
1da177e4 1386
4a1c0893 1387 opendata = nfs4_open_recoverdata_alloc(ctx, state,
ccb46e20 1388 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
6f220ed5
TM		 1389 if (IS_ERR(opendata))
1390 return PTR_ERR(opendata);
f597c537 1391 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1392 ret = nfs4_open_recover(opendata, state);
c6d00e63 1393 nfs4_opendata_put(opendata);
864472e9 1394 return ret;
1da177e4
LT		 1395}
1396
13437e12 1397int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1398{
1399 struct nfs4_exception exception = { };
539cd03a 1400 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1401 int err;
1402 do {
13437e12 1403 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1404 switch (err) {
1405 case 0:
965b5d67
TM		 1406 case -ENOENT:
1407 case -ESTALE:
1408 goto out;
bcfa49f6
RL		 1409 case -NFS4ERR_BADSESSION:
1410 case -NFS4ERR_BADSLOT:
1411 case -NFS4ERR_BAD_HIGH_SLOT:
1412 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1413 case -NFS4ERR_DEADSESSION:
37380e42 1414 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 1415 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 1416 err = -EAGAIN;
bcfa49f6 1417 goto out;
1da177e4
LT		 1418 case -NFS4ERR_STALE_CLIENTID:
1419 case -NFS4ERR_STALE_STATEID:
37380e42 1420 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1421 case -NFS4ERR_EXPIRED:
1422 /* Don't recall a delegation if it was lost */
0400a6b0 1423 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 1424 err = -EAGAIN;
965b5d67 1425 goto out;
a1d0b5ee 1426 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1427 case -NFS4ERR_ADMIN_REVOKED:
1428 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1429 nfs_inode_find_state_and_recover(state->inode,
1430 stateid);
0400a6b0 1431 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 1432 case -ENOMEM:
1433 err = 0;
1434 goto out;
1da177e4 1435 }
37380e42 1436 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1437 err = nfs4_handle_exception(server, err, &exception);
1438 } while (exception.retry);
965b5d67 1439out:
1da177e4
LT		 1440 return err;
1441}
1442
cdd4e68b
TM		 1443static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1444{
1445 struct nfs4_opendata *data = calldata;
1446
1447 data->rpc_status = task->tk_status;
26e976a8 1448 if (data->rpc_status == 0) {
f597c537 1449 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1450 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1451 renew_lease(data->o_res.server, data->timestamp);
3e309914 1452 data->rpc_done = 1;
26e976a8 1453 }
cdd4e68b
TM		 1454}
1455
1456static void nfs4_open_confirm_release(void *calldata)
1457{
1458 struct nfs4_opendata *data = calldata;
1459 struct nfs4_state *state = NULL;
1460
1461 /* If this request hasn't been cancelled, do nothing */
1462 if (data->cancelled == 0)
1463 goto out_free;
1464 /* In case of error, no cleanup! */
3e309914 1465 if (!data->rpc_done)
cdd4e68b 1466 goto out_free;
cdd4e68b 1467 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1468 if (!IS_ERR(state))
643168c2 1469 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1470out_free:
c6d00e63 1471 nfs4_opendata_put(data);
cdd4e68b
TM		 1472}
1473
1474static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1475 .rpc_call_done = nfs4_open_confirm_done,
1476 .rpc_release = nfs4_open_confirm_release,
1477};
1478
1479/*
1480 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1481 */
1482static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1483{
1484 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1485 struct rpc_task *task;
5138fde0
TM		 1486 struct rpc_message msg = {
1487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1488 .rpc_argp = &data->c_arg,
1489 .rpc_resp = &data->c_res,
1490 .rpc_cred = data->owner->so_cred,
1491 };
c970aa85
TM		 1492 struct rpc_task_setup task_setup_data = {
1493 .rpc_client = server->client,
5138fde0 1494 .rpc_message = &msg,
c970aa85
TM		 1495 .callback_ops = &nfs4_open_confirm_ops,
1496 .callback_data = data,
101070ca 1497 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1498 .flags = RPC_TASK_ASYNC,
1499 };
1da177e4
LT		 1500 int status;
1501
c6d00e63 1502 kref_get(&data->kref);
3e309914
TM		 1503 data->rpc_done = 0;
1504 data->rpc_status = 0;
5138fde0 1505 data->timestamp = jiffies;
c970aa85 1506 task = rpc_run_task(&task_setup_data);
7a1218a2 1507 if (IS_ERR(task))
cdd4e68b 1508 return PTR_ERR(task);
cdd4e68b
TM		 1509 status = nfs4_wait_for_completion_rpc_task(task);
1510 if (status != 0) {
1511 data->cancelled = 1;
1512 smp_wmb();
1513 } else
1514 status = data->rpc_status;
e6b3c4db 1515 rpc_put_task(task);
1da177e4
LT		 1516 return status;
1517}
1518
24ac23ab 1519static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1520{
24ac23ab
TM		 1521 struct nfs4_opendata *data = calldata;
1522 struct nfs4_state_owner *sp = data->owner;
5138fde0 1523
24ac23ab 1524 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1525 goto out_wait;
aac00a8d
TM		 1526 /*
1527 * Check if we still need to send an OPEN call, or if we can use
1528 * a delegation instead.
1529 */
1530 if (data->state != NULL) {
1531 struct nfs_delegation *delegation;
1532
dc0b027d 1533 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1534 goto out_no_action;
aac00a8d
TM		 1535 rcu_read_lock();
1536 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1537 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1538 can_open_delegated(delegation, data->o_arg.fmode))
1539 goto unlock_no_action;
aac00a8d
TM		 1540 rcu_read_unlock();
1541 }
95b72eb0 1542 /* Update client id. */
1f0e890d 1543 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1544 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1545 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1546 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1547 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1548 }
26e976a8 1549 data->timestamp = jiffies;
035168ab 1550 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1551 &data->o_arg.seq_args,
2240a9e2
TM		 1552 &data->o_res.seq_res,
1553 task) != 0)
1554 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1555 return;
652f89f6
TM		 1556unlock_no_action:
1557 rcu_read_unlock();
6ee41268
TM		 1558out_no_action:
1559 task->tk_action = NULL;
c8da19b9 1560out_wait:
b75ad4cd 1561 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1562}
1563
24ac23ab
TM		 1564static void nfs4_open_done(struct rpc_task *task, void *calldata)
1565{
1566 struct nfs4_opendata *data = calldata;
1da177e4 1567
24ac23ab 1568 data->rpc_status = task->tk_status;
d898528c 1569
14516c3a
TM		 1570 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1571 return;
d898528c 1572
24ac23ab 1573 if (task->tk_status == 0) {
807d66d8
TM		 1574 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1575 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1576 case S_IFREG:
1577 break;
1578 case S_IFLNK:
24ac23ab 1579 data->rpc_status = -ELOOP;
6f926b5b
TM		 1580 break;
1581 case S_IFDIR:
24ac23ab 1582 data->rpc_status = -EISDIR;
6f926b5b
TM		 1583 break;
1584 default:
24ac23ab 1585 data->rpc_status = -ENOTDIR;
807d66d8 1586 }
6f926b5b 1587 }
26e976a8 1588 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1589 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1590 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1591 }
3e309914 1592 data->rpc_done = 1;
24ac23ab 1593}
6f926b5b 1594
24ac23ab
TM		 1595static void nfs4_open_release(void *calldata)
1596{
1597 struct nfs4_opendata *data = calldata;
1598 struct nfs4_state *state = NULL;
1599
1600 /* If this request hasn't been cancelled, do nothing */
1601 if (data->cancelled == 0)
1602 goto out_free;
1603 /* In case of error, no cleanup! */
3e309914 1604 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1605 goto out_free;
1606 /* In case we need an open_confirm, no cleanup! */
1607 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1608 goto out_free;
24ac23ab 1609 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1610 if (!IS_ERR(state))
643168c2 1611 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1612out_free:
c6d00e63 1613 nfs4_opendata_put(data);
24ac23ab
TM		 1614}
1615
1616static const struct rpc_call_ops nfs4_open_ops = {
1617 .rpc_call_prepare = nfs4_open_prepare,
1618 .rpc_call_done = nfs4_open_done,
1619 .rpc_release = nfs4_open_release,
1620};
1621
b257957e 1622static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1623{
1624 struct inode *dir = data->dir->d_inode;
1625 struct nfs_server *server = NFS_SERVER(dir);
1626 struct nfs_openargs *o_arg = &data->o_arg;
1627 struct nfs_openres *o_res = &data->o_res;
1628 struct rpc_task *task;
5138fde0
TM		 1629 struct rpc_message msg = {
1630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1631 .rpc_argp = o_arg,
1632 .rpc_resp = o_res,
1633 .rpc_cred = data->owner->so_cred,
1634 };
c970aa85
TM		 1635 struct rpc_task_setup task_setup_data = {
1636 .rpc_client = server->client,
5138fde0 1637 .rpc_message = &msg,
c970aa85
TM		 1638 .callback_ops = &nfs4_open_ops,
1639 .callback_data = data,
101070ca 1640 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1641 .flags = RPC_TASK_ASYNC,
1642 };
24ac23ab
TM		 1643 int status;
1644
9d12b216 1645 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1646 kref_get(&data->kref);
3e309914
TM		 1647 data->rpc_done = 0;
1648 data->rpc_status = 0;
2ced46c2 1649 data->cancelled = 0;
b257957e 1650 if (isrecover)
8fe72bac 1651 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1652 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1653 if (IS_ERR(task))
1654 return PTR_ERR(task);
1655 status = nfs4_wait_for_completion_rpc_task(task);
1656 if (status != 0) {
1657 data->cancelled = 1;
1658 smp_wmb();
1659 } else
1660 status = data->rpc_status;
1661 rpc_put_task(task);
1662
1663 return status;
1664}
1665
1666static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1667{
1668 struct inode *dir = data->dir->d_inode;
1669 struct nfs_openres *o_res = &data->o_res;
1670 int status;
1671
1672 status = nfs4_run_open_task(data, 1);
1673 if (status != 0 || !data->rpc_done)
1674 return status;
1675
6926afd1
TM		 1676 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1677
b257957e
AB		 1678 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1679 status = _nfs4_proc_open_confirm(data);
1680 if (status != 0)
1681 return status;
1682 }
1683
1684 return status;
1685}
1686
6168f62c
WAA		 1687static int nfs4_opendata_access(struct rpc_cred *cred,
1688 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1689 struct nfs4_state *state, fmode_t fmode,
1690 int openflags)
6168f62c
WAA		 1691{
1692 struct nfs_access_entry cache;
1693 u32 mask;
1694
1695 /* access call failed or for some reason the server doesn't
1696 * support any access modes -- defer access call until later */
1697 if (opendata->o_res.access_supported == 0)
1698 return 0;
1699
1700 mask = 0;
bbd3a8ee 1701 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1702 * write mode bits, but POSIX allows the creating process to write.
1703 * use openflags to check for exec, because fmode won't
1704 * always have FMODE_EXEC set when file open for exec. */
1705 if (openflags & __FMODE_EXEC) {
1706 /* ONLY check for exec rights */
1707 mask = MAY_EXEC;
1708 } else if (fmode & FMODE_READ)
1709 mask = MAY_READ;
6168f62c
WAA		 1710
1711 cache.cred = cred;
1712 cache.jiffies = jiffies;
1713 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1714 nfs_access_add_cache(state->inode, &cache);
1715
bbd3a8ee 1716 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1717 return 0;
1718
1719 /* even though OPEN succeeded, access is denied. Close the file */
1720 nfs4_close_state(state, fmode);
998f40b5 1721 return -EACCES;
6168f62c
WAA		 1722}
1723
b257957e
AB		 1724/*
1725 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1726 */
1727static int _nfs4_proc_open(struct nfs4_opendata *data)
1728{
1729 struct inode *dir = data->dir->d_inode;
1730 struct nfs_server *server = NFS_SERVER(dir);
1731 struct nfs_openargs *o_arg = &data->o_arg;
1732 struct nfs_openres *o_res = &data->o_res;
1733 int status;
1734
1735 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1736 if (!data->rpc_done)
1737 return status;
1738 if (status != 0) {
1739 if (status == -NFS4ERR_BADNAME &&
1740 !(o_arg->open_flags & O_CREAT))
1741 return -ENOENT;
24ac23ab 1742 return status;
08ef7bd3 1743 }
24ac23ab 1744
6926afd1
TM		 1745 nfs_fattr_map_and_free_names(server, &data->f_attr);
1746
90ff0c54 1747 if (o_arg->open_flags & O_CREAT)
56ae19f3 1748 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1749 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1750 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1751 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1752 status = _nfs4_proc_open_confirm(data);
1da177e4 1753 if (status != 0)
24ac23ab 1754 return status;
1da177e4
LT		 1755 }
1756 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1757 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1758 return 0;
1da177e4
LT		 1759}
1760
d83217c1
AA		 1761static int nfs4_recover_expired_lease(struct nfs_server *server)
1762{
1763 return nfs4_client_recover_expired_lease(server->nfs_client);
1764}
1765
1da177e4
LT		 1766/*
1767 * OPEN_EXPIRED:
1768 * reclaim state on the server after a network partition.
1769 * Assumes caller holds the appropriate lock
1770 */
539cd03a 1771static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1772{
e56e0b78 1773 struct nfs4_opendata *opendata;
864472e9 1774 int ret;
1da177e4 1775
4a1c0893 1776 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1777 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1778 if (IS_ERR(opendata))
1779 return PTR_ERR(opendata);
864472e9 1780 ret = nfs4_open_recover(opendata, state);
35d05778 1781 if (ret == -ESTALE)
3d4ff43d 1782 d_drop(ctx->dentry);
c6d00e63 1783 nfs4_opendata_put(opendata);
864472e9 1784 return ret;
1da177e4
LT		 1785}
1786
a9ed2e25 1787static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1788{
539cd03a 1789 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1790 struct nfs4_exception exception = { };
1791 int err;
1792
1793 do {
539cd03a 1794 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1795 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1796 continue;
a9ed2e25
TM		 1797 switch (err) {
1798 default:
1799 goto out;
1800 case -NFS4ERR_GRACE:
1801 case -NFS4ERR_DELAY:
1802 nfs4_handle_exception(server, err, &exception);
1803 err = 0;
1804 }
202b50dc 1805 } while (exception.retry);
a9ed2e25 1806out:
202b50dc
TM		 1807 return err;
1808}
1809
1da177e4
LT		 1810static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1811{
1da177e4 1812 struct nfs_open_context *ctx;
864472e9 1813 int ret;
1da177e4 1814
864472e9
TM		 1815 ctx = nfs4_state_find_open_context(state);
1816 if (IS_ERR(ctx))
91876b13 1817 return -EAGAIN;
539cd03a 1818 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1819 put_nfs_open_context(ctx);
1820 return ret;
1da177e4
LT		 1821}
1822
f062eb6c 1823#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1824static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1825{
f062eb6c 1826 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1827 nfs4_stateid *stateid = &state->stateid;
1828 int status;
1829
1830 /* If a state reset has been done, test_stateid is unneeded */
1831 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1832 return;
1833
1834 status = nfs41_test_stateid(server, stateid);
1835 if (status != NFS_OK) {
1836 /* Free the stateid unless the server explicitly
1837 * informs us the stateid is unrecognized. */
1838 if (status != -NFS4ERR_BAD_STATEID)
1839 nfs41_free_stateid(server, stateid);
6938867e 1840 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1841
6938867e
BS		 1842 write_seqlock(&state->seqlock);
1843 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1844 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1845 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1846 }
1847}
1848
1849/**
1850 * nfs41_check_open_stateid - possibly free an open stateid
1851 *
1852 * @state: NFSv4 state for an inode
1853 *
1854 * Returns NFS_OK if recovery for this stateid is now finished.
1855 * Otherwise a negative NFS4ERR value is returned.
1856 */
1857static int nfs41_check_open_stateid(struct nfs4_state *state)
1858{
1859 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1860 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1861 int status;
1862
1863 /* If a state reset has been done, test_stateid is unneeded */
1864 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1865 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1866 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1867 return -NFS4ERR_BAD_STATEID;
1868
1869 status = nfs41_test_stateid(server, stateid);
1870 if (status != NFS_OK) {
1871 /* Free the stateid unless the server explicitly
1872 * informs us the stateid is unrecognized. */
1873 if (status != -NFS4ERR_BAD_STATEID)
1874 nfs41_free_stateid(server, stateid);
1875
1876 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1877 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1878 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1879 }
1880 return status;
1881}
1882
1883static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1884{
eb64cf96 1885 int status;
b01dd1d8 1886
3e60ffdd
CL		 1887 nfs41_clear_delegation_stateid(state);
1888 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1889 if (status != NFS_OK)
1890 status = nfs4_open_expired(sp, state);
1891 return status;
f062eb6c
BS		 1892}
1893#endif
1894
aa53ed54
JL		 1895/*
1896 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1897 * fields corresponding to attributes that were used to store the verifier.
1898 * Make sure we clobber those fields in the later setattr call
1899 */
1900static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1901{
1902 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1903 !(sattr->ia_valid & ATTR_ATIME_SET))
1904 sattr->ia_valid |= ATTR_ATIME;
1905
1906 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1907 !(sattr->ia_valid & ATTR_MTIME_SET))
1908 sattr->ia_valid |= ATTR_MTIME;
1909}
1910
c21443c2
TM		 1911static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1912 fmode_t fmode,
1913 int flags,
1914 struct nfs4_state **res)
1915{
1916 struct nfs4_state_owner *sp = opendata->owner;
1917 struct nfs_server *server = sp->so_server;
1918 struct nfs4_state *state;
1919 unsigned int seq;
1920 int ret;
1921
1922 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1923
1924 ret = _nfs4_proc_open(opendata);
1925 if (ret != 0)
1926 goto out;
1927
1928 state = nfs4_opendata_to_nfs4_state(opendata);
1929 ret = PTR_ERR(state);
1930 if (IS_ERR(state))
1931 goto out;
1932 if (server->caps & NFS_CAP_POSIX_LOCK)
1933 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1934
1935 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1936 if (ret != 0)
1937 goto out;
1938
91876b13 1939 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1940 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1941 *res = state;
1942out:
1943 return ret;
1944}
1945
1da177e4 1946/*
24ac23ab 1947 * Returns a referenced nfs4_state
1da177e4 1948 */
82be417a
AA		 1949static int _nfs4_do_open(struct inode *dir,
1950 struct dentry *dentry,
1951 fmode_t fmode,
1952 int flags,
1953 struct iattr *sattr,
1954 struct rpc_cred *cred,
1955 struct nfs4_state **res,
1956 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1957{
1958 struct nfs4_state_owner *sp;
1959 struct nfs4_state *state = NULL;
1960 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1961 struct nfs4_opendata *opendata;
49f9a0fa 1962 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 1963 int status;
1da177e4
LT		 1964
1965 /* Protect against reboot recovery conflicts */
1da177e4 1966 status = -ENOMEM;
d1e284d5
TM		 1967 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1968 if (sp == NULL) {
1da177e4
LT		 1969 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1970 goto out_err;
1971 }
58d9714a
TM		 1972 status = nfs4_recover_expired_lease(server);
1973 if (status != 0)
b4454fe1 1974 goto err_put_state_owner;
82a2c1b7
AV		 1975 if (dentry->d_inode != NULL)
1976 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1977 status = -ENOMEM;
49f9a0fa
TM		 1978 if (dentry->d_inode)
1979 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 1980 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 1981 claim, GFP_KERNEL);
e56e0b78 1982 if (opendata == NULL)
95d35cb4 1983 goto err_put_state_owner;
1da177e4 1984
82be417a
AA		 1985 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1986 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1987 if (!opendata->f_attr.mdsthreshold)
1988 goto err_opendata_put;
1549210f 1989 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1990 }
82a2c1b7
AV		 1991 if (dentry->d_inode != NULL)
1992 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1993
c21443c2 1994 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 1995 if (status != 0)
1996 goto err_opendata_put;
1997
0ab64e0e
TM		 1998 if (opendata->o_arg.open_flags & O_EXCL) {
1999 nfs4_exclusive_attrset(opendata, sattr);
2000
2001 nfs_fattr_init(opendata->o_res.f_attr);
2002 status = nfs4_do_setattr(state->inode, cred,
2003 opendata->o_res.f_attr, sattr,
2004 state);
2005 if (status == 0)
2006 nfs_setattr_update_inode(state->inode, sattr);
2007 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2008 }
82be417a
AA		 2009
2010 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2011 *ctx_th = opendata->f_attr.mdsthreshold;
2012 else
2013 kfree(opendata->f_attr.mdsthreshold);
2014 opendata->f_attr.mdsthreshold = NULL;
2015
c6d00e63 2016 nfs4_opendata_put(opendata);
1da177e4 2017 nfs4_put_state_owner(sp);
1da177e4
LT		 2018 *res = state;
2019 return 0;
c6d00e63 2020err_opendata_put:
82be417a 2021 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2022 nfs4_opendata_put(opendata);
e56e0b78
TM		 2023err_put_state_owner:
2024 nfs4_put_state_owner(sp);
1da177e4 2025out_err:
1da177e4
LT		 2026 *res = NULL;
2027 return status;
2028}
2029
2030
82be417a
AA		 2031static struct nfs4_state *nfs4_do_open(struct inode *dir,
2032 struct dentry *dentry,
2033 fmode_t fmode,
2034 int flags,
2035 struct iattr *sattr,
2036 struct rpc_cred *cred,
2037 struct nfs4_threshold **ctx_th)
1da177e4 2038{
49f9a0fa 2039 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2040 struct nfs4_exception exception = { };
2041 struct nfs4_state *res;
2042 int status;
2043
6168f62c 2044 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2045 do {
82be417a
AA		 2046 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2047 &res, ctx_th);
1da177e4
LT		 2048 if (status == 0)
2049 break;
2050 /* NOTE: BAD_SEQID means the server and client disagree about the
2051 * book-keeping w.r.t. state-changing operations
2052 * (OPEN/CLOSE/LOCK/LOCKU...)
2053 * It is actually a sign of a bug on the client or on the server.
2054 *
2055 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2056 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2057 * have unhashed the old state_owner for us, and that we can
2058 * therefore safely retry using a new one. We should still warn
2059 * the user though...
2060 */
2061 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2062 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2063 " returned a bad sequence-id error!\n",
2064 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2065 exception.retry = 1;
2066 continue;
2067 }
550f5747
TM		 2068 /*
2069 * BAD_STATEID on OPEN means that the server cancelled our
2070 * state before it received the OPEN_CONFIRM.
2071 * Recover by retrying the request as per the discussion
2072 * on Page 181 of RFC3530.
2073 */
2074 if (status == -NFS4ERR_BAD_STATEID) {
2075 exception.retry = 1;
2076 continue;
2077 }
aac00a8d
TM		 2078 if (status == -EAGAIN) {
2079 /* We must have found a delegation */
2080 exception.retry = 1;
2081 continue;
2082 }
49f9a0fa
TM		 2083 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2084 continue;
2085 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2086 status, &exception));
2087 } while (exception.retry);
2088 return res;
2089}
2090
659bfcd6
TM		 2091static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2092 struct nfs_fattr *fattr, struct iattr *sattr,
2093 struct nfs4_state *state)
1da177e4 2094{
3e4f6290 2095 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2096 struct nfs_setattrargs arg = {
3e4f6290 2097 .fh = NFS_FH(inode),
1da177e4
LT		 2098 .iap = sattr,
2099 .server = server,
2100 .bitmask = server->attr_bitmask,
2101 };
2102 struct nfs_setattrres res = {
2103 .fattr = fattr,
2104 .server = server,
2105 };
2106 struct rpc_message msg = {
659bfcd6
TM		 2107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2108 .rpc_argp = &arg,
2109 .rpc_resp = &res,
2110 .rpc_cred = cred,
1da177e4 2111 };
26e976a8 2112 unsigned long timestamp = jiffies;
65e4308d 2113 int status;
1da177e4 2114
0e574af1 2115 nfs_fattr_init(fattr);
1da177e4 2116
5d422301 2117 if (state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2118 struct nfs_lockowner lockowner = {
2119 .l_owner = current->files,
2120 .l_pid = current->tgid,
2121 };
4fc8796d 2122 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2123 &lockowner);
4fc8796d
TM		 2124 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2125 FMODE_WRITE)) {
3e4f6290 2126 /* Use that stateid */
08e9eac4 2127 } else
f597c537 2128 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2129
7c513058 2130 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2131 if (status == 0 && state != NULL)
2132 renew_lease(server, timestamp);
65e4308d 2133 return status;
1da177e4
LT		 2134}
2135
659bfcd6
TM		 2136static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2137 struct nfs_fattr *fattr, struct iattr *sattr,
2138 struct nfs4_state *state)
1da177e4 2139{
3e4f6290 2140 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2141 struct nfs4_exception exception = {
2142 .state = state,
3114ea7a 2143 .inode = inode,
a1d0b5ee 2144 };
1da177e4
LT		 2145 int err;
2146 do {
451146be
TM		 2147 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2148 switch (err) {
2149 case -NFS4ERR_OPENMODE:
2150 if (state && !(state->state & FMODE_WRITE)) {
2151 err = -EBADF;
2152 if (sattr->ia_valid & ATTR_OPEN)
2153 err = -EACCES;
2154 goto out;
2155 }
2156 }
2157 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2158 } while (exception.retry);
451146be 2159out:
1da177e4
LT		 2160 return err;
2161}
2162
2163struct nfs4_closedata {
2164 struct inode *inode;
2165 struct nfs4_state *state;
2166 struct nfs_closeargs arg;
2167 struct nfs_closeres res;
516a6af6 2168 struct nfs_fattr fattr;
26e976a8 2169 unsigned long timestamp;
f7e8917a
FI		 2170 bool roc;
2171 u32 roc_barrier;
1da177e4
LT		 2172};
2173
963d8fe5 2174static void nfs4_free_closedata(void *data)
9512135d 2175{
963d8fe5
TM		 2176 struct nfs4_closedata *calldata = data;
2177 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2178 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2179
f7e8917a
FI		 2180 if (calldata->roc)
2181 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2182 nfs4_put_open_state(calldata->state);
2183 nfs_free_seqid(calldata->arg.seqid);
9512135d 2184 nfs4_put_state_owner(sp);
322b2b90 2185 nfs_sb_deactive(sb);
9512135d
TM		 2186 kfree(calldata);
2187}
2188
88069f77
TM		 2189static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2190 fmode_t fmode)
2191{
2192 spin_lock(&state->owner->so_lock);
2193 if (!(fmode & FMODE_READ))
2194 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2195 if (!(fmode & FMODE_WRITE))
2196 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2197 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2198 spin_unlock(&state->owner->so_lock);
2199}
2200
963d8fe5 2201static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2202{
963d8fe5 2203 struct nfs4_closedata *calldata = data;
1da177e4 2204 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2205 struct nfs_server *server = NFS_SERVER(calldata->inode);
2206
a3ca5651 2207 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2208 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2209 return;
1da177e4
LT		 2210 /* hmm. we are done with the inode, and in the process of freeing
2211 * the state_owner. we keep this around to process errors
2212 */
1da177e4
LT		 2213 switch (task->tk_status) {
2214 case 0:
f7e8917a
FI		 2215 if (calldata->roc)
2216 pnfs_roc_set_barrier(state->inode,
2217 calldata->roc_barrier);
45328c35 2218 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2219 renew_lease(server, calldata->timestamp);
88069f77
TM		 2220 nfs4_close_clear_stateid_flags(state,
2221 calldata->arg.fmode);
1da177e4
LT		 2222 break;
2223 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2224 case -NFS4ERR_OLD_STATEID:
2225 case -NFS4ERR_BAD_STATEID:
1da177e4 2226 case -NFS4ERR_EXPIRED:
dc0b027d 2227 if (calldata->arg.fmode == 0)
9e33bed5 2228 break;
1da177e4 2229 default:
72211dbe
TM		 2230 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2231 rpc_restart_call_prepare(task);
1da177e4 2232 }
72211dbe 2233 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2234 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2235 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2236}
2237
4ce70ada 2238static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2239{
4ce70ada 2240 struct nfs4_closedata *calldata = data;
9512135d 2241 struct nfs4_state *state = calldata->state;
7fdab069 2242 struct inode *inode = calldata->inode;
88069f77 2243 int call_close = 0;
9512135d 2244
a3ca5651 2245 dprintk("%s: begin!\n", __func__);
963d8fe5 2246 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2247 goto out_wait;
003707c7 2248
88069f77
TM		 2249 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2250 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2251 spin_lock(&state->owner->so_lock);
003707c7 2252 /* Calculate the change in open mode */
e7616923 2253 if (state->n_rdwr == 0) {
003707c7 2254 if (state->n_rdonly == 0) {
88069f77
TM		 2255 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2256 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2257 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2258 }
2259 if (state->n_wronly == 0) {
88069f77
TM		 2260 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2261 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2262 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2263 }
e7616923 2264 }
5d422301
TM		 2265 if (!nfs4_valid_open_stateid(state))
2266 call_close = 0;
4cecb76f 2267 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2268
2269 if (!call_close) {
963d8fe5 2270 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2271 goto out_no_action;
9512135d 2272 }
88069f77 2273
f7e8917a 2274 if (calldata->arg.fmode == 0) {
88069f77 2275 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2276 if (calldata->roc &&
7fdab069 2277 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
c8da19b9 2278 goto out_wait;
f7e8917a 2279 }
88069f77 2280
516a6af6 2281 nfs_fattr_init(calldata->res.fattr);
26e976a8 2282 calldata->timestamp = jiffies;
7fdab069 2283 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2284 &calldata->arg.seq_args,
2285 &calldata->res.seq_res,
2240a9e2
TM		 2286 task) != 0)
2287 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2288 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2289 return;
2290out_no_action:
2291 task->tk_action = NULL;
2292out_wait:
2293 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2294}
2295
963d8fe5 2296static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2297 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2298 .rpc_call_done = nfs4_close_done,
2299 .rpc_release = nfs4_free_closedata,
2300};
2301
1da177e4
LT		 2302/*
2303 * It is possible for data to be read/written from a mem-mapped file
2304 * after the sys_close call (which hits the vfs layer as a flush).
2305 * This means that we can't safely call nfsv4 close on a file until
2306 * the inode is cleared. This in turn means that we are not good
2307 * NFSv4 citizens - we do not indicate to the server to update the file's
2308 * share state even when we are done with one of the three share
2309 * stateid's in the inode.
2310 *
2311 * NOTE: Caller must be holding the sp->so_owner semaphore!
2312 */
1f7977c1 2313int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2314{
4a35bd41 2315 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2316 struct nfs4_closedata *calldata;
b39e625b
TM		 2317 struct nfs4_state_owner *sp = state->owner;
2318 struct rpc_task *task;
5138fde0
TM		 2319 struct rpc_message msg = {
2320 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2321 .rpc_cred = state->owner->so_cred,
2322 };
c970aa85
TM		 2323 struct rpc_task_setup task_setup_data = {
2324 .rpc_client = server->client,
5138fde0 2325 .rpc_message = &msg,
c970aa85 2326 .callback_ops = &nfs4_close_ops,
101070ca 2327 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2328 .flags = RPC_TASK_ASYNC,
2329 };
9512135d 2330 int status = -ENOMEM;
1da177e4 2331
8535b2be 2332 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2333 if (calldata == NULL)
9512135d 2334 goto out;
9d12b216 2335 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2336 calldata->inode = state->inode;
1da177e4 2337 calldata->state = state;
4a35bd41 2338 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2339 calldata->arg.stateid = &state->open_stateid;
1da177e4 2340 /* Serialization for the sequence id */
8535b2be 2341 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2342 if (calldata->arg.seqid == NULL)
2343 goto out_free_calldata;
dc0b027d 2344 calldata->arg.fmode = 0;
a65318bf 2345 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2346 calldata->res.fattr = &calldata->fattr;
c1d51931 2347 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2348 calldata->res.server = server;
1f7977c1 2349 calldata->roc = pnfs_roc(state->inode);
643168c2 2350 nfs_sb_active(calldata->inode->i_sb);
9512135d 2351
1174dd1f
TM		 2352 msg.rpc_argp = &calldata->arg;
2353 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2354 task_setup_data.callback_data = calldata;
2355 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2356 if (IS_ERR(task))
2357 return PTR_ERR(task);
a49c3c77
TM		 2358 status = 0;
2359 if (wait)
2360 status = rpc_wait_for_completion_task(task);
b39e625b 2361 rpc_put_task(task);
a49c3c77 2362 return status;
9512135d
TM		 2363out_free_calldata:
2364 kfree(calldata);
2365out:
b39e625b
TM		 2366 nfs4_put_open_state(state);
2367 nfs4_put_state_owner(sp);
9512135d 2368 return status;
1da177e4
LT		 2369}
2370
2b484297 2371static struct inode *
cd9a1c0e 2372nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2373{
1da177e4 2374 struct nfs4_state *state;
1da177e4 2375
565277f6 2376 /* Protect against concurrent sillydeletes */
82be417a
AA		 2377 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2378 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2379 if (IS_ERR(state))
2380 return ERR_CAST(state);
cd9a1c0e 2381 ctx->state = state;
f46e0bd3 2382 return igrab(state->inode);
1da177e4
LT		 2383}
2384
1185a552 2385static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2386{
2387 if (ctx->state == NULL)
2388 return;
2389 if (is_sync)
643168c2 2390 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2391 else
643168c2 2392 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2393}
1da177e4
LT		 2394
2395static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2396{
43652ad5
BH		 2397 struct nfs4_server_caps_arg args = {
2398 .fhandle = fhandle,
2399 };
1da177e4
LT		 2400 struct nfs4_server_caps_res res = {};
2401 struct rpc_message msg = {
2402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2403 .rpc_argp = &args,
1da177e4
LT		 2404 .rpc_resp = &res,
2405 };
2406 int status;
2407
7c513058 2408 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2409 if (status == 0) {
2410 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2411 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2412 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2413 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2414 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2415 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2416 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2417 server->caps |= NFS_CAP_ACLS;
2418 if (res.has_links != 0)
2419 server->caps |= NFS_CAP_HARDLINKS;
2420 if (res.has_symlinks != 0)
2421 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2422 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2423 server->caps |= NFS_CAP_FILEID;
2424 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2425 server->caps |= NFS_CAP_MODE;
2426 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2427 server->caps |= NFS_CAP_NLINK;
2428 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2429 server->caps |= NFS_CAP_OWNER;
2430 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2431 server->caps |= NFS_CAP_OWNER_GROUP;
2432 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2433 server->caps |= NFS_CAP_ATIME;
2434 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2435 server->caps |= NFS_CAP_CTIME;
2436 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2437 server->caps |= NFS_CAP_MTIME;
2438
a65318bf
TM		 2439 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2440 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2441 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2442 server->acl_bitmask = res.acl_bitmask;
264e6351 2443 server->fh_expire_type = res.fh_expire_type;
1da177e4 2444 }
cccef3b9 2445
1da177e4
LT		 2446 return status;
2447}
2448
55a97593 2449int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2450{
2451 struct nfs4_exception exception = { };
2452 int err;
2453 do {
2454 err = nfs4_handle_exception(server,
2455 _nfs4_server_capabilities(server, fhandle),
2456 &exception);
2457 } while (exception.retry);
2458 return err;
2459}
2460
2461static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2462 struct nfs_fsinfo *info)
2463{
1da177e4
LT		 2464 struct nfs4_lookup_root_arg args = {
2465 .bitmask = nfs4_fattr_bitmap,
2466 };
2467 struct nfs4_lookup_res res = {
2468 .server = server,
0e574af1 2469 .fattr = info->fattr,
1da177e4
LT		 2470 .fh = fhandle,
2471 };
2472 struct rpc_message msg = {
2473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2474 .rpc_argp = &args,
2475 .rpc_resp = &res,
2476 };
008f55d0 2477
0e574af1 2478 nfs_fattr_init(info->fattr);
7c513058 2479 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2480}
2481
2482static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2483 struct nfs_fsinfo *info)
2484{
2485 struct nfs4_exception exception = { };
2486 int err;
2487 do {
fb8a5ba8
BS		 2488 err = _nfs4_lookup_root(server, fhandle, info);
2489 switch (err) {
2490 case 0:
2491 case -NFS4ERR_WRONGSEC:
05e9cfb4 2492 goto out;
fb8a5ba8
BS		 2493 default:
2494 err = nfs4_handle_exception(server, err, &exception);
2495 }
1da177e4 2496 } while (exception.retry);
05e9cfb4 2497out:
1da177e4
LT		 2498 return err;
2499}
2500
8f70e95f
BS		 2501static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2502 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2503{
2504 struct rpc_auth *auth;
2505 int ret;
2506
2507 auth = rpcauth_create(flavor, server->client);
e8d920c5 2508 if (IS_ERR(auth)) {
75bc8821 2509 ret = -EACCES;
8f70e95f
BS		 2510 goto out;
2511 }
2512 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2513out:
2514 return ret;
2515}
2516
801a16dc 2517static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2518 struct nfs_fsinfo *info)
1da177e4 2519{
8f70e95f 2520 int i, len, status = 0;
0fabee24 2521 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2522
6a1a1e34 2523 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2524 if (len < 0)
2525 return len;
8f70e95f
BS		 2526
2527 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2528 /* AUTH_UNIX is the default flavor if none was specified,
2529 * thus has already been tried. */
2530 if (flav_array[i] == RPC_AUTH_UNIX)
2531 continue;
2532
8f70e95f 2533 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2534 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2535 continue;
2536 break;
8f70e95f 2537 }
fb8a5ba8
BS		 2538 /*
2539 * -EACCESS could mean that the user doesn't have correct permissions
2540 * to access the mount. It could also mean that we tried to mount
2541 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2542 * existing mount programs don't handle -EACCES very well so it should
2543 * be mapped to -EPERM instead.
2544 */
2545 if (status == -EACCES)
2546 status = -EPERM;
801a16dc
BS		 2547 return status;
2548}
2549
2ed4b95b
CL		 2550static int nfs4_do_find_root_sec(struct nfs_server *server,
2551 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2552{
2553 int mv = server->nfs_client->cl_minorversion;
2554 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2555}
2556
2557/**
2558 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2559 * @server: initialized nfs_server handle
2560 * @fhandle: we fill in the pseudo-fs root file handle
2561 * @info: we fill in an FSINFO struct
2562 *
2563 * Returns zero on success, or a negative errno.
801a16dc 2564 */
3028eb2b
BS		 2565int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2566 struct nfs_fsinfo *info)
801a16dc 2567{
2ed4b95b
CL		 2568 int status;
2569
2570 status = nfs4_lookup_root(server, fhandle, info);
2571 if ((status == -NFS4ERR_WRONGSEC) &&
2572 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2573 status = nfs4_do_find_root_sec(server, fhandle, info);
2574
1da177e4
LT		 2575 if (status == 0)
2576 status = nfs4_server_capabilities(server, fhandle);
2577 if (status == 0)
2578 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2579
c12e87f4 2580 return nfs4_map_errors(status);
1da177e4
LT		 2581}
2582
bae36241
BS		 2583static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2584 struct nfs_fsinfo *info)
2585{
2586 int error;
2587 struct nfs_fattr *fattr = info->fattr;
2588
2589 error = nfs4_server_capabilities(server, mntfh);
2590 if (error < 0) {
2591 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2592 return error;
2593 }
2594
2595 error = nfs4_proc_getattr(server, mntfh, fattr);
2596 if (error < 0) {
2597 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2598 return error;
2599 }
2600
2601 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2602 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2603 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2604
2605 return error;
2606}
2607
6b97fd3d
MN		 2608/*
2609 * Get locations and (maybe) other attributes of a referral.
2610 * Note that we'll actually follow the referral later when
2611 * we detect fsid mismatch in inode revalidation
2612 */
f05d147f
BS		 2613static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2614 const struct qstr *name, struct nfs_fattr *fattr,
2615 struct nfs_fh *fhandle)
6b97fd3d
MN		 2616{
2617 int status = -ENOMEM;
2618 struct page *page = NULL;
2619 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2620
2621 page = alloc_page(GFP_KERNEL);
2622 if (page == NULL)
2623 goto out;
2624 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2625 if (locations == NULL)
2626 goto out;
2627
f05d147f 2628 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2629 if (status != 0)
2630 goto out;
2631 /* Make sure server returned a different fsid for the referral */
2632 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2633 dprintk("%s: server did not return a different fsid for"
2634 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2635 status = -EIO;
2636 goto out;
2637 }
533eb461
AA		 2638 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2639 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2640
533eb461 2641 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2642 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2643 memset(fhandle, 0, sizeof(struct nfs_fh));
2644out:
2645 if (page)
2646 __free_page(page);
5d7ca35a 2647 kfree(locations);
6b97fd3d
MN		 2648 return status;
2649}
2650
1da177e4
LT		 2651static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2652{
2653 struct nfs4_getattr_arg args = {
2654 .fh = fhandle,
2655 .bitmask = server->attr_bitmask,
2656 };
2657 struct nfs4_getattr_res res = {
2658 .fattr = fattr,
2659 .server = server,
2660 };
2661 struct rpc_message msg = {
2662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2663 .rpc_argp = &args,
2664 .rpc_resp = &res,
2665 };
2666
0e574af1 2667 nfs_fattr_init(fattr);
7c513058 2668 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2669}
2670
2671static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2672{
2673 struct nfs4_exception exception = { };
2674 int err;
2675 do {
2676 err = nfs4_handle_exception(server,
2677 _nfs4_proc_getattr(server, fhandle, fattr),
2678 &exception);
2679 } while (exception.retry);
2680 return err;
2681}
2682
2683/*
2684 * The file is not closed if it is opened due to the a request to change
2685 * the size of the file. The open call will not be needed once the
2686 * VFS layer lookup-intents are implemented.
2687 *
2688 * Close is called when the inode is destroyed.
2689 * If we haven't opened the file for O_WRONLY, we
2690 * need to in the size_change case to obtain a stateid.
2691 *
2692 * Got race?
2693 * Because OPEN is always done by name in nfsv4, it is
2694 * possible that we opened a different file by the same
2695 * name. We can recognize this race condition, but we
2696 * can't do anything about it besides returning an error.
2697 *
2698 * This will be fixed with VFS changes (lookup-intent).
2699 */
2700static int
2701nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2702 struct iattr *sattr)
2703{
08e9eac4 2704 struct inode *inode = dentry->d_inode;
659bfcd6 2705 struct rpc_cred *cred = NULL;
d530838b 2706 struct nfs4_state *state = NULL;
1da177e4
LT		 2707 int status;
2708
8a1636c4 2709 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2710 pnfs_commit_and_return_layout(inode);
8a1636c4 2711
0e574af1 2712 nfs_fattr_init(fattr);
1da177e4 2713
2669940d
AA		 2714 /* Deal with open(O_TRUNC) */
2715 if (sattr->ia_valid & ATTR_OPEN)
2716 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2717
2718 /* Optimization: if the end result is no change, don't RPC */
2719 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2720 return 0;
2721
d530838b 2722 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2723 if (sattr->ia_valid & ATTR_FILE) {
2724 struct nfs_open_context *ctx;
2725
2726 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2727 if (ctx) {
2728 cred = ctx->cred;
2729 state = ctx->state;
2730 }
659bfcd6 2731 }
08e9eac4 2732
659bfcd6 2733 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2734 if (status == 0)
2735 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2736 return status;
2737}
2738
0c2e53f1
TM		 2739static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2740 const struct qstr *name, struct nfs_fh *fhandle,
2741 struct nfs_fattr *fattr)
2b3de441 2742{
0c2e53f1 2743 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2744 int status;
2745 struct nfs4_lookup_arg args = {
2746 .bitmask = server->attr_bitmask,
0c2e53f1 2747 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2748 .name = name,
2749 };
2750 struct nfs4_lookup_res res = {
2751 .server = server,
2752 .fattr = fattr,
2753 .fh = fhandle,
2754 };
2755 struct rpc_message msg = {
2756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2757 .rpc_argp = &args,
2758 .rpc_resp = &res,
2759 };
2760
2761 nfs_fattr_init(fattr);
2762
1da177e4 2763 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2764 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2765 dprintk("NFS reply lookup: %d\n", status);
2766 return status;
2767}
2768
72de53ec 2769static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2770{
7ebb9315 2771 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2772 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2773 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2774 fattr->nlink = 2;
2775}
2776
72de53ec
BS		 2777static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2778 struct qstr *name, struct nfs_fh *fhandle,
2779 struct nfs_fattr *fattr)
1da177e4
LT		 2780{
2781 struct nfs4_exception exception = { };
72de53ec 2782 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2783 int err;
2784 do {
72de53ec
BS		 2785 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2786 switch (err) {
08ef7bd3 2787 case -NFS4ERR_BADNAME:
72de53ec
BS		 2788 err = -ENOENT;
2789 goto out;
0c2e53f1 2790 case -NFS4ERR_MOVED:
f05d147f 2791 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2792 goto out;
0c2e53f1 2793 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2794 err = -EPERM;
2795 if (client != *clnt)
2796 goto out;
2797
2798 client = nfs4_create_sec_client(client, dir, name);
2799 if (IS_ERR(client))
2800 return PTR_ERR(client);
2801
2802 exception.retry = 1;
2803 break;
2804 default:
2805 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2806 }
1da177e4 2807 } while (exception.retry);
72de53ec
BS		 2808
2809out:
2810 if (err == 0)
2811 *clnt = client;
2812 else if (client != *clnt)
2813 rpc_shutdown_client(client);
2814
1da177e4
LT		 2815 return err;
2816}
2817
80a16b21 2818static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2819 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2820{
2821 int status;
2822 struct rpc_clnt *client = NFS_CLIENT(dir);
2823
2824 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2825 if (client != NFS_CLIENT(dir)) {
2826 rpc_shutdown_client(client);
2827 nfs_fixup_secinfo_attributes(fattr);
2828 }
2829 return status;
2830}
2831
f05d147f
BS		 2832struct rpc_clnt *
2833nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2834 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2835{
2836 int status;
2837 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2838
2839 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2840 if (status < 0) {
2841 rpc_shutdown_client(client);
2842 return ERR_PTR(status);
2843 }
2844 return client;
2845}
2846
1da177e4
LT		 2847static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2848{
76b32999 2849 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2850 struct nfs4_accessargs args = {
2851 .fh = NFS_FH(inode),
a4980e78 2852 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2853 };
2854 struct nfs4_accessres res = {
2855 .server = server,
1da177e4 2856 };
1da177e4
LT		 2857 struct rpc_message msg = {
2858 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2859 .rpc_argp = &args,
2860 .rpc_resp = &res,
2861 .rpc_cred = entry->cred,
2862 };
2863 int mode = entry->mask;
2864 int status;
2865
2866 /*
2867 * Determine which access bits we want to ask for...
2868 */
2869 if (mode & MAY_READ)
2870 args.access |= NFS4_ACCESS_READ;
2871 if (S_ISDIR(inode->i_mode)) {
2872 if (mode & MAY_WRITE)
2873 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2874 if (mode & MAY_EXEC)
2875 args.access |= NFS4_ACCESS_LOOKUP;
2876 } else {
2877 if (mode & MAY_WRITE)
2878 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2879 if (mode & MAY_EXEC)
2880 args.access |= NFS4_ACCESS_EXECUTE;
2881 }
c407d41a
TM		 2882
2883 res.fattr = nfs_alloc_fattr();
2884 if (res.fattr == NULL)
2885 return -ENOMEM;
2886
7c513058 2887 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2888 if (!status) {
6168f62c 2889 nfs_access_set_mask(entry, res.access);
c407d41a 2890 nfs_refresh_inode(inode, res.fattr);
1da177e4 2891 }
c407d41a 2892 nfs_free_fattr(res.fattr);
1da177e4
LT		 2893 return status;
2894}
2895
2896static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2897{
2898 struct nfs4_exception exception = { };
2899 int err;
2900 do {
2901 err = nfs4_handle_exception(NFS_SERVER(inode),
2902 _nfs4_proc_access(inode, entry),
2903 &exception);
2904 } while (exception.retry);
2905 return err;
2906}
2907
2908/*
2909 * TODO: For the time being, we don't try to get any attributes
2910 * along with any of the zero-copy operations READ, READDIR,
2911 * READLINK, WRITE.
2912 *
2913 * In the case of the first three, we want to put the GETATTR
2914 * after the read-type operation -- this is because it is hard
2915 * to predict the length of a GETATTR response in v4, and thus
2916 * align the READ data correctly. This means that the GETATTR
2917 * may end up partially falling into the page cache, and we should
2918 * shift it into the 'tail' of the xdr_buf before processing.
2919 * To do this efficiently, we need to know the total length
2920 * of data received, which doesn't seem to be available outside
2921 * of the RPC layer.
2922 *
2923 * In the case of WRITE, we also want to put the GETATTR after
2924 * the operation -- in this case because we want to make sure
140150db 2925 * we get the post-operation mtime and size.
1da177e4
LT		 2926 *
2927 * Both of these changes to the XDR layer would in fact be quite
2928 * minor, but I decided to leave them for a subsequent patch.
2929 */
2930static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2931 unsigned int pgbase, unsigned int pglen)
2932{
2933 struct nfs4_readlink args = {
2934 .fh = NFS_FH(inode),
2935 .pgbase = pgbase,
2936 .pglen = pglen,
2937 .pages = &page,
2938 };
f50c7000 2939 struct nfs4_readlink_res res;
1da177e4
LT		 2940 struct rpc_message msg = {
2941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2942 .rpc_argp = &args,
f50c7000 2943 .rpc_resp = &res,
1da177e4
LT		 2944 };
2945
7c513058 2946 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2947}
2948
2949static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2950 unsigned int pgbase, unsigned int pglen)
2951{
2952 struct nfs4_exception exception = { };
2953 int err;
2954 do {
2955 err = nfs4_handle_exception(NFS_SERVER(inode),
2956 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2957 &exception);
2958 } while (exception.retry);
2959 return err;
2960}
2961
1da177e4 2962/*
8867fe58 2963 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2964 */
1da177e4
LT		 2965static int
2966nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2967 int flags)
1da177e4 2968{
8867fe58 2969 struct nfs_open_context *ctx;
1da177e4 2970 struct nfs4_state *state;
1da177e4
LT		 2971 int status = 0;
2972
8867fe58
MS		 2973 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2974 if (IS_ERR(ctx))
2975 return PTR_ERR(ctx);
2976
a8a5da99 2977 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2978 state = nfs4_do_open(dir, dentry, ctx->mode,
2979 flags, sattr, ctx->cred,
2980 &ctx->mdsthreshold);
d4d9cdcb 2981 d_drop(dentry);
1da177e4
LT		 2982 if (IS_ERR(state)) {
2983 status = PTR_ERR(state);
c0204fd2 2984 goto out;
1da177e4 2985 }
d4d9cdcb 2986 d_add(dentry, igrab(state->inode));
d75340cc 2987 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2988 ctx->state = state;
1da177e4 2989out:
8867fe58 2990 put_nfs_open_context(ctx);
1da177e4
LT		 2991 return status;
2992}
2993
2994static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2995{
16e42959 2996 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2997 struct nfs_removeargs args = {
1da177e4 2998 .fh = NFS_FH(dir),
26fe5750 2999 .name = *name,
16e42959 3000 };
4fdc17b2 3001 struct nfs_removeres res = {
16e42959 3002 .server = server,
1da177e4 3003 };
1da177e4 3004 struct rpc_message msg = {
4fdc17b2
TM		 3005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3006 .rpc_argp = &args,
3007 .rpc_resp = &res,
1da177e4 3008 };
778d2817 3009 int status;
1da177e4 3010
7c513058 3011 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3012 if (status == 0)
16e42959 3013 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3014 return status;
3015}
3016
3017static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3018{
3019 struct nfs4_exception exception = { };
3020 int err;
3021 do {
3022 err = nfs4_handle_exception(NFS_SERVER(dir),
3023 _nfs4_proc_remove(dir, name),
3024 &exception);
3025 } while (exception.retry);
3026 return err;
3027}
3028
e4eff1a6 3029static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3030{
e4eff1a6
TM		 3031 struct nfs_server *server = NFS_SERVER(dir);
3032 struct nfs_removeargs *args = msg->rpc_argp;
3033 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3034
e4eff1a6 3035 res->server = server;
1da177e4 3036 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3037 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3038}
3039
34e137cc
BS		 3040static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3041{
d9afbd1b
TM		 3042 nfs4_setup_sequence(NFS_SERVER(data->dir),
3043 &data->args.seq_args,
3044 &data->res.seq_res,
3045 task);
1da177e4
LT		 3046}
3047
e4eff1a6 3048static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3049{
e4eff1a6
TM		 3050 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3051
14516c3a
TM		 3052 if (!nfs4_sequence_done(task, &res->seq_res))
3053 return 0;
9e33bed5 3054 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3055 return 0;
3056 update_changeattr(dir, &res->cinfo);
e4eff1a6 3057 return 1;
1da177e4
LT		 3058}
3059
d3d4152a
JL		 3060static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3061{
3062 struct nfs_server *server = NFS_SERVER(dir);
3063 struct nfs_renameargs *arg = msg->rpc_argp;
3064 struct nfs_renameres *res = msg->rpc_resp;
3065
3066 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3067 res->server = server;
9d12b216 3068 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3069}
3070
c6bfa1a1
BS		 3071static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3072{
d9afbd1b
TM		 3073 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3074 &data->args.seq_args,
3075 &data->res.seq_res,
3076 task);
d3d4152a
JL		 3077}
3078
3079static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3080 struct inode *new_dir)
3081{
3082 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3083
3084 if (!nfs4_sequence_done(task, &res->seq_res))
3085 return 0;
3086 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3087 return 0;
3088
3089 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3090 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3091 return 1;
3092}
3093
1da177e4
LT		 3094static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3095 struct inode *new_dir, struct qstr *new_name)
3096{
6caf2c82 3097 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3098 struct nfs_renameargs arg = {
1da177e4
LT		 3099 .old_dir = NFS_FH(old_dir),
3100 .new_dir = NFS_FH(new_dir),
3101 .old_name = old_name,
3102 .new_name = new_name,
6caf2c82 3103 };
e8582a8b 3104 struct nfs_renameres res = {
6caf2c82 3105 .server = server,
1da177e4 3106 };
1da177e4
LT		 3107 struct rpc_message msg = {
3108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3109 .rpc_argp = &arg,
3110 .rpc_resp = &res,
3111 };
011fff72 3112 int status = -ENOMEM;
1da177e4 3113
7c513058 3114 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3115 if (!status) {
3116 update_changeattr(old_dir, &res.old_cinfo);
3117 update_changeattr(new_dir, &res.new_cinfo);
3118 }
3119 return status;
3120}
3121
3122static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3123 struct inode *new_dir, struct qstr *new_name)
3124{
3125 struct nfs4_exception exception = { };
3126 int err;
3127 do {
3128 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3129 _nfs4_proc_rename(old_dir, old_name,
3130 new_dir, new_name),
3131 &exception);
3132 } while (exception.retry);
3133 return err;
3134}
3135
3136static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3137{
91ba2eee 3138 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3139 struct nfs4_link_arg arg = {
3140 .fh = NFS_FH(inode),
3141 .dir_fh = NFS_FH(dir),
3142 .name = name,
91ba2eee
TM		 3143 .bitmask = server->attr_bitmask,
3144 };
91ba2eee
TM		 3145 struct nfs4_link_res res = {
3146 .server = server,
1da177e4 3147 };
1da177e4
LT		 3148 struct rpc_message msg = {
3149 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3150 .rpc_argp = &arg,
91ba2eee 3151 .rpc_resp = &res,
1da177e4 3152 };
136f2627
TM		 3153 int status = -ENOMEM;
3154
3155 res.fattr = nfs_alloc_fattr();
778d2817 3156 if (res.fattr == NULL)
136f2627 3157 goto out;
1da177e4 3158
7c513058 3159 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3160 if (!status) {
3161 update_changeattr(dir, &res.cinfo);
73a3d07c 3162 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3163 }
136f2627 3164out:
136f2627 3165 nfs_free_fattr(res.fattr);
1da177e4
LT		 3166 return status;
3167}
3168
3169static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3170{
3171 struct nfs4_exception exception = { };
3172 int err;
3173 do {
3174 err = nfs4_handle_exception(NFS_SERVER(inode),
3175 _nfs4_proc_link(inode, dir, name),
3176 &exception);
3177 } while (exception.retry);
3178 return err;
3179}
3180
57dc9a57
TM		 3181struct nfs4_createdata {
3182 struct rpc_message msg;
3183 struct nfs4_create_arg arg;
3184 struct nfs4_create_res res;
3185 struct nfs_fh fh;
3186 struct nfs_fattr fattr;
57dc9a57
TM		 3187};
3188
3189static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3190 struct qstr *name, struct iattr *sattr, u32 ftype)
3191{
3192 struct nfs4_createdata *data;
3193
3194 data = kzalloc(sizeof(*data), GFP_KERNEL);
3195 if (data != NULL) {
3196 struct nfs_server *server = NFS_SERVER(dir);
3197
3198 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3199 data->msg.rpc_argp = &data->arg;
3200 data->msg.rpc_resp = &data->res;
3201 data->arg.dir_fh = NFS_FH(dir);
3202 data->arg.server = server;
3203 data->arg.name = name;
3204 data->arg.attrs = sattr;
3205 data->arg.ftype = ftype;
3206 data->arg.bitmask = server->attr_bitmask;
3207 data->res.server = server;
3208 data->res.fh = &data->fh;
3209 data->res.fattr = &data->fattr;
57dc9a57 3210 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3211 }
3212 return data;
3213}
3214
3215static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3216{
7c513058 3217 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3218 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3219 if (status == 0) {
3220 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3221 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3222 }
3223 return status;
3224}
3225
3226static void nfs4_free_createdata(struct nfs4_createdata *data)
3227{
3228 kfree(data);
3229}
3230
4f390c15 3231static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3232 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3233{
57dc9a57
TM		 3234 struct nfs4_createdata *data;
3235 int status = -ENAMETOOLONG;
1da177e4 3236
94a6d753 3237 if (len > NFS4_MAXPATHLEN)
57dc9a57 3238 goto out;
4f390c15 3239
57dc9a57
TM		 3240 status = -ENOMEM;
3241 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3242 if (data == NULL)
3243 goto out;
3244
3245 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3246 data->arg.u.symlink.pages = &page;
3247 data->arg.u.symlink.len = len;
1da177e4 3248
57dc9a57
TM		 3249 status = nfs4_do_create(dir, dentry, data);
3250
3251 nfs4_free_createdata(data);
3252out:
1da177e4
LT		 3253 return status;
3254}
3255
4f390c15 3256static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3257 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3258{
3259 struct nfs4_exception exception = { };
3260 int err;
3261 do {
3262 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3263 _nfs4_proc_symlink(dir, dentry, page,
3264 len, sattr),
1da177e4
LT		 3265 &exception);
3266 } while (exception.retry);
3267 return err;
3268}
3269
3270static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3271 struct iattr *sattr)
3272{
57dc9a57
TM		 3273 struct nfs4_createdata *data;
3274 int status = -ENOMEM;
1da177e4 3275
57dc9a57
TM		 3276 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3277 if (data == NULL)
3278 goto out;
3279
3280 status = nfs4_do_create(dir, dentry, data);
3281
3282 nfs4_free_createdata(data);
3283out:
1da177e4
LT		 3284 return status;
3285}
3286
3287static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3288 struct iattr *sattr)
3289{
3290 struct nfs4_exception exception = { };
3291 int err;
a8a5da99
AK		 3292
3293 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3294 do {
3295 err = nfs4_handle_exception(NFS_SERVER(dir),
3296 _nfs4_proc_mkdir(dir, dentry, sattr),
3297 &exception);
3298 } while (exception.retry);
3299 return err;
3300}
3301
3302static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3303 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3304{
3305 struct inode *dir = dentry->d_inode;
3306 struct nfs4_readdir_arg args = {
3307 .fh = NFS_FH(dir),
56e4ebf8 3308 .pages = pages,
1da177e4
LT		 3309 .pgbase = 0,
3310 .count = count,
96d25e53 3311 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3312 .plus = plus,
1da177e4
LT		 3313 };
3314 struct nfs4_readdir_res res;
3315 struct rpc_message msg = {
3316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3317 .rpc_argp = &args,
3318 .rpc_resp = &res,
3319 .rpc_cred = cred,
3320 };
3321 int status;
3322
3110ff80 3323 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3324 dentry->d_parent->d_name.name,
3325 dentry->d_name.name,
3326 (unsigned long long)cookie);
c3f52af3 3327 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3328 res.pgbase = args.pgbase;
7c513058 3329 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3330 if (status >= 0) {
c3f52af3 3331 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3332 status += args.pgbase;
3333 }
c4812998
TM		 3334
3335 nfs_invalidate_atime(dir);
3336
3110ff80 3337 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3338 return status;
3339}
3340
3341static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3342 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3343{
3344 struct nfs4_exception exception = { };
3345 int err;
3346 do {
3347 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3348 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3349 pages, count, plus),
1da177e4
LT		 3350 &exception);
3351 } while (exception.retry);
3352 return err;
3353}
3354
3355static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3356 struct iattr *sattr, dev_t rdev)
3357{
57dc9a57
TM		 3358 struct nfs4_createdata *data;
3359 int mode = sattr->ia_mode;
3360 int status = -ENOMEM;
1da177e4 3361
57dc9a57
TM		 3362 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3363 if (data == NULL)
3364 goto out;
3365
1da177e4 3366 if (S_ISFIFO(mode))
57dc9a57 3367 data->arg.ftype = NF4FIFO;
1da177e4 3368 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3369 data->arg.ftype = NF4BLK;
3370 data->arg.u.device.specdata1 = MAJOR(rdev);
3371 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3372 }
3373 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3374 data->arg.ftype = NF4CHR;
3375 data->arg.u.device.specdata1 = MAJOR(rdev);
3376 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3377 } else if (!S_ISSOCK(mode)) {
3378 status = -EINVAL;
3379 goto out_free;
1da177e4 3380 }
1da177e4 3381
57dc9a57 3382 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3383out_free:
57dc9a57
TM		 3384 nfs4_free_createdata(data);
3385out:
1da177e4
LT		 3386 return status;
3387}
3388
3389static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3390 struct iattr *sattr, dev_t rdev)
3391{
3392 struct nfs4_exception exception = { };
3393 int err;
a8a5da99
AK		 3394
3395 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3396 do {
3397 err = nfs4_handle_exception(NFS_SERVER(dir),
3398 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3399 &exception);
3400 } while (exception.retry);
3401 return err;
3402}
3403
3404static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3405 struct nfs_fsstat *fsstat)
3406{
3407 struct nfs4_statfs_arg args = {
3408 .fh = fhandle,
3409 .bitmask = server->attr_bitmask,
3410 };
24ad148a
BH		 3411 struct nfs4_statfs_res res = {
3412 .fsstat = fsstat,
3413 };
1da177e4
LT		 3414 struct rpc_message msg = {
3415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3416 .rpc_argp = &args,
24ad148a 3417 .rpc_resp = &res,
1da177e4
LT		 3418 };
3419
0e574af1 3420 nfs_fattr_init(fsstat->fattr);
7c513058 3421 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3422}
3423
3424static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3425{
3426 struct nfs4_exception exception = { };
3427 int err;
3428 do {
3429 err = nfs4_handle_exception(server,
3430 _nfs4_proc_statfs(server, fhandle, fsstat),
3431 &exception);
3432 } while (exception.retry);
3433 return err;
3434}
3435
3436static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3437 struct nfs_fsinfo *fsinfo)
3438{
3439 struct nfs4_fsinfo_arg args = {
3440 .fh = fhandle,
3441 .bitmask = server->attr_bitmask,
3442 };
3dda5e43
BH		 3443 struct nfs4_fsinfo_res res = {
3444 .fsinfo = fsinfo,
3445 };
1da177e4
LT		 3446 struct rpc_message msg = {
3447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3448 .rpc_argp = &args,
3dda5e43 3449 .rpc_resp = &res,
1da177e4
LT		 3450 };
3451
7c513058 3452 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3453}
3454
3455static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3456{
3457 struct nfs4_exception exception = { };
83ca7f5a 3458 unsigned long now = jiffies;
1da177e4
LT		 3459 int err;
3460
3461 do {
83ca7f5a
CL		 3462 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3463 if (err == 0) {
3464 struct nfs_client *clp = server->nfs_client;
3465
3466 spin_lock(&clp->cl_lock);
3467 clp->cl_lease_time = fsinfo->lease_time * HZ;
3468 clp->cl_last_renewal = now;
3469 spin_unlock(&clp->cl_lock);
3470 break;
3471 }
3472 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3473 } while (exception.retry);
3474 return err;
3475}
3476
3477static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3478{
e38eb650
BS		 3479 int error;
3480
0e574af1 3481 nfs_fattr_init(fsinfo->fattr);
e38eb650 3482 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3483 if (error == 0) {
3484 /* block layout checks this! */
3485 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3486 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3487 }
e38eb650
BS		 3488
3489 return error;
1da177e4
LT		 3490}
3491
3492static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3493 struct nfs_pathconf *pathconf)
3494{
3495 struct nfs4_pathconf_arg args = {
3496 .fh = fhandle,
3497 .bitmask = server->attr_bitmask,
3498 };
d45b2989
BH		 3499 struct nfs4_pathconf_res res = {
3500 .pathconf = pathconf,
3501 };
1da177e4
LT		 3502 struct rpc_message msg = {
3503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3504 .rpc_argp = &args,
d45b2989 3505 .rpc_resp = &res,
1da177e4
LT		 3506 };
3507
3508 /* None of the pathconf attributes are mandatory to implement */
3509 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3510 memset(pathconf, 0, sizeof(*pathconf));
3511 return 0;
3512 }
3513
0e574af1 3514 nfs_fattr_init(pathconf->fattr);
7c513058 3515 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3516}
3517
3518static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3519 struct nfs_pathconf *pathconf)
3520{
3521 struct nfs4_exception exception = { };
3522 int err;
3523
3524 do {
3525 err = nfs4_handle_exception(server,
3526 _nfs4_proc_pathconf(server, fhandle, pathconf),
3527 &exception);
3528 } while (exception.retry);
3529 return err;
3530}
3531
5521abfd 3532int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3533 const struct nfs_open_context *ctx,
3534 const struct nfs_lock_context *l_ctx,
3535 fmode_t fmode)
3536{
3537 const struct nfs_lockowner *lockowner = NULL;
3538
3539 if (l_ctx != NULL)
3540 lockowner = &l_ctx->lockowner;
5521abfd 3541 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3542}
3543EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3544
5521abfd
TM		 3545static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3546 const struct nfs_open_context *ctx,
3547 const struct nfs_lock_context *l_ctx,
3548 fmode_t fmode)
3549{
3550 nfs4_stateid current_stateid;
3551
3552 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3553 return false;
3554 return nfs4_stateid_match(stateid, &current_stateid);
3555}
3556
3557static bool nfs4_error_stateid_expired(int err)
3558{
3559 switch (err) {
3560 case -NFS4ERR_DELEG_REVOKED:
3561 case -NFS4ERR_ADMIN_REVOKED:
3562 case -NFS4ERR_BAD_STATEID:
3563 case -NFS4ERR_STALE_STATEID:
3564 case -NFS4ERR_OLD_STATEID:
3565 case -NFS4ERR_OPENMODE:
3566 case -NFS4ERR_EXPIRED:
3567 return true;
3568 }
3569 return false;
3570}
3571
d20581aa
BH		 3572void __nfs4_read_done_cb(struct nfs_read_data *data)
3573{
cd841605 3574 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3575}
3576
cbdabc7f 3577static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3578{
cd841605 3579 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3580
9e33bed5 3581 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3582 rpc_restart_call_prepare(task);
ec06c096 3583 return -EAGAIN;
1da177e4 3584 }
8850df99 3585
d20581aa 3586 __nfs4_read_done_cb(data);
1da177e4 3587 if (task->tk_status > 0)
ec06c096
TM		 3588 renew_lease(server, data->timestamp);
3589 return 0;
1da177e4
LT		 3590}
3591
5521abfd
TM		 3592static bool nfs4_read_stateid_changed(struct rpc_task *task,
3593 struct nfs_readargs *args)
3594{
3595
3596 if (!nfs4_error_stateid_expired(task->tk_status) ||
3597 nfs4_stateid_is_current(&args->stateid,
3598 args->context,
3599 args->lock_context,
3600 FMODE_READ))
3601 return false;
3602 rpc_restart_call_prepare(task);
3603 return true;
3604}
3605
cbdabc7f
AA		 3606static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3607{
3608
3609 dprintk("--> %s\n", __func__);
3610
3611 if (!nfs4_sequence_done(task, &data->res.seq_res))
3612 return -EAGAIN;
5521abfd
TM		 3613 if (nfs4_read_stateid_changed(task, &data->args))
3614 return -EAGAIN;
d20581aa
BH		 3615 return data->read_done_cb ? data->read_done_cb(task, data) :
3616 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3617}
3618
bdc7f021 3619static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3620{
1da177e4 3621 data->timestamp = jiffies;
cbdabc7f 3622 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3623 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3624 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3625}
3626
ea7c3303
BS		 3627static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3628{
9b206149 3629 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3630 &data->args.seq_args,
3631 &data->res.seq_res,
9b206149
TM		 3632 task))
3633 return;
3634 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3635 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3636}
3637
b029bc9b 3638static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3639{
cd841605 3640 struct inode *inode = data->header->inode;
1da177e4 3641
9e33bed5 3642 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3643 rpc_restart_call_prepare(task);
788e7a89 3644 return -EAGAIN;
1da177e4 3645 }
4f9838c7 3646 if (task->tk_status >= 0) {
1da177e4 3647 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3648 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3649 }
788e7a89 3650 return 0;
1da177e4
LT		 3651}
3652
5521abfd
TM		 3653static bool nfs4_write_stateid_changed(struct rpc_task *task,
3654 struct nfs_writeargs *args)
3655{
3656
3657 if (!nfs4_error_stateid_expired(task->tk_status) ||
3658 nfs4_stateid_is_current(&args->stateid,
3659 args->context,
3660 args->lock_context,
3661 FMODE_WRITE))
3662 return false;
3663 rpc_restart_call_prepare(task);
3664 return true;
3665}
3666
b029bc9b
FI		 3667static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3668{
3669 if (!nfs4_sequence_done(task, &data->res.seq_res))
3670 return -EAGAIN;
5521abfd
TM		 3671 if (nfs4_write_stateid_changed(task, &data->args))
3672 return -EAGAIN;
d20581aa
BH		 3673 return data->write_done_cb ? data->write_done_cb(task, data) :
3674 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3675}
3676
5a37f851
TM		 3677static
3678bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3679{
5a37f851
TM		 3680 const struct nfs_pgio_header *hdr = data->header;
3681
3682 /* Don't request attributes for pNFS or O_DIRECT writes */
3683 if (data->ds_clp != NULL || hdr->dreq != NULL)
3684 return false;
3685 /* Otherwise, request attributes if and only if we don't hold
3686 * a delegation
3687 */
011e2a7f 3688 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3689}
a69aef14 3690
bdc7f021 3691static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3692{
cd841605 3693 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3694
5a37f851 3695 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3696 data->args.bitmask = NULL;
3697 data->res.fattr = NULL;
3698 } else
3699 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3700
b029bc9b
FI		 3701 if (!data->write_done_cb)
3702 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3703 data->res.server = server;
1da177e4
LT		 3704 data->timestamp = jiffies;
3705
bdc7f021 3706 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3707 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3708}
3709
c6cb80d0
BS		 3710static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3711{
9b206149 3712 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3713 &data->args.seq_args,
3714 &data->res.seq_res,
9b206149
TM		 3715 task))
3716 return;
3717 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3718 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3719}
3720
0b7c0153 3721static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3722{
d9afbd1b
TM		 3723 nfs4_setup_sequence(NFS_SERVER(data->inode),
3724 &data->args.seq_args,
3725 &data->res.seq_res,
3726 task);
1da177e4
LT		 3727}
3728
0b7c0153 3729static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3730{
1da177e4 3731 struct inode *inode = data->inode;
14516c3a 3732
9e33bed5 3733 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3734 rpc_restart_call_prepare(task);
788e7a89 3735 return -EAGAIN;
1da177e4 3736 }
788e7a89 3737 return 0;
1da177e4
LT		 3738}
3739
0b7c0153 3740static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3741{
3742 if (!nfs4_sequence_done(task, &data->res.seq_res))
3743 return -EAGAIN;
0b7c0153 3744 return data->commit_done_cb(task, data);
5f452431
FI		 3745}
3746
0b7c0153 3747static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3748{
788e7a89 3749 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3750
0b7c0153
FI		 3751 if (data->commit_done_cb == NULL)
3752 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3753 data->res.server = server;
bdc7f021 3754 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3755 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3756}
3757
9bc4e3ca
CL		 3758struct nfs4_renewdata {
3759 struct nfs_client *client;
3760 unsigned long timestamp;
3761};
3762
1da177e4
LT		 3763/*
3764 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3765 * standalone procedure for queueing an asynchronous RENEW.
3766 */
9bc4e3ca 3767static void nfs4_renew_release(void *calldata)
dc96aef9 3768{
9bc4e3ca
CL		 3769 struct nfs4_renewdata *data = calldata;
3770 struct nfs_client *clp = data->client;
dc96aef9 3771
0851de06
AB		 3772 if (atomic_read(&clp->cl_count) > 1)
3773 nfs4_schedule_state_renewal(clp);
3774 nfs_put_client(clp);
9bc4e3ca 3775 kfree(data);
dc96aef9
AB		 3776}
3777
9bc4e3ca 3778static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3779{
9bc4e3ca
CL		 3780 struct nfs4_renewdata *data = calldata;
3781 struct nfs_client *clp = data->client;
3782 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3783
3784 if (task->tk_status < 0) {
95baa25c 3785 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3786 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3787 return;
3788 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3789 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3790 return;
3791 }
3792 nfs4_schedule_path_down_recovery(clp);
1da177e4 3793 }
452e9352 3794 do_renew_lease(clp, timestamp);
1da177e4
LT		 3795}
3796
963d8fe5
TM		 3797static const struct rpc_call_ops nfs4_renew_ops = {
3798 .rpc_call_done = nfs4_renew_done,
dc96aef9 3799 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3800};
3801
2f60ea6b 3802static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3803{
3804 struct rpc_message msg = {
3805 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3806 .rpc_argp = clp,
b4454fe1 3807 .rpc_cred = cred,
1da177e4 3808 };
9bc4e3ca 3809 struct nfs4_renewdata *data;
1da177e4 3810
2f60ea6b
TM		 3811 if (renew_flags == 0)
3812 return 0;
0851de06
AB		 3813 if (!atomic_inc_not_zero(&clp->cl_count))
3814 return -EIO;
b569ad34 3815 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3816 if (data == NULL)
3817 return -ENOMEM;
3818 data->client = clp;
3819 data->timestamp = jiffies;
1da177e4 3820 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3821 &nfs4_renew_ops, data);
1da177e4
LT		 3822}
3823
8534d4ec 3824static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3825{
3826 struct rpc_message msg = {
3827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3828 .rpc_argp = clp,
b4454fe1 3829 .rpc_cred = cred,
1da177e4
LT		 3830 };
3831 unsigned long now = jiffies;
3832 int status;
3833
3834 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3835 if (status < 0)
3836 return status;
452e9352 3837 do_renew_lease(clp, now);
1da177e4
LT		 3838 return 0;
3839}
3840
aa1870af
BF		 3841static inline int nfs4_server_supports_acls(struct nfs_server *server)
3842{
3843 return (server->caps & NFS_CAP_ACLS)
3844 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3845 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3846}
3847
21f498c2
TM		 3848/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3849 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3850 * the stack.
3851 */
21f498c2 3852#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3853
e9e3d724
NH		 3854static int buf_to_pages_noslab(const void *buf, size_t buflen,
3855 struct page **pages, unsigned int *pgbase)
3856{
3857 struct page *newpage, **spages;
3858 int rc = 0;
3859 size_t len;
3860 spages = pages;
3861
3862 do {
21f498c2 3863 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3864 newpage = alloc_page(GFP_KERNEL);
3865
3866 if (newpage == NULL)
3867 goto unwind;
3868 memcpy(page_address(newpage), buf, len);
3869 buf += len;
3870 buflen -= len;
3871 *pages++ = newpage;
3872 rc++;
3873 } while (buflen != 0);
3874
3875 return rc;
3876
3877unwind:
3878 for(; rc > 0; rc--)
3879 __free_page(spages[rc-1]);
3880 return -ENOMEM;
3881}
3882
e50a1c2e
BF		 3883struct nfs4_cached_acl {
3884 int cached;
3885 size_t len;
3e9d4154 3886 char data[0];
e50a1c2e
BF		 3887};
3888
3889static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3890{
3891 struct nfs_inode *nfsi = NFS_I(inode);
3892
3893 spin_lock(&inode->i_lock);
3894 kfree(nfsi->nfs4_acl);
3895 nfsi->nfs4_acl = acl;
3896 spin_unlock(&inode->i_lock);
3897}
3898
3899static void nfs4_zap_acl_attr(struct inode *inode)
3900{
3901 nfs4_set_cached_acl(inode, NULL);
3902}
3903
3904static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3905{
3906 struct nfs_inode *nfsi = NFS_I(inode);
3907 struct nfs4_cached_acl *acl;
3908 int ret = -ENOENT;
3909
3910 spin_lock(&inode->i_lock);
3911 acl = nfsi->nfs4_acl;
3912 if (acl == NULL)
3913 goto out;
3914 if (buf == NULL) /* user is just asking for length */
3915 goto out_len;
3916 if (acl->cached == 0)
3917 goto out;
3918 ret = -ERANGE; /* see getxattr(2) man page */
3919 if (acl->len > buflen)
3920 goto out;
3921 memcpy(buf, acl->data, acl->len);
3922out_len:
3923 ret = acl->len;
3924out:
3925 spin_unlock(&inode->i_lock);
3926 return ret;
3927}
3928
5794d21e 3929static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3930{
3931 struct nfs4_cached_acl *acl;
b291f1b1 3932 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3933
1f1ea6c2 3934 if (buflen <= PAGE_SIZE) {
b291f1b1 3935 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3936 if (acl == NULL)
3937 goto out;
3938 acl->cached = 1;
5794d21e 3939 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3940 } else {
3941 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3942 if (acl == NULL)
3943 goto out;
3944 acl->cached = 0;
3945 }
3946 acl->len = acl_len;
3947out:
3948 nfs4_set_cached_acl(inode, acl);
3949}
3950
bf118a34
AA		 3951/*
3952 * The getxattr API returns the required buffer length when called with a
3953 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3954 * the required buf. On a NULL buf, we send a page of data to the server
3955 * guessing that the ACL request can be serviced by a page. If so, we cache
3956 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3957 * the cache. If not so, we throw away the page, and cache the required
3958 * length. The next getxattr call will then produce another round trip to
3959 * the server, this time with the input buf of the required size.
3960 */
16b4289c 3961static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3962{
bf118a34 3963 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3964 struct nfs_getaclargs args = {
3965 .fh = NFS_FH(inode),
3966 .acl_pages = pages,
3967 .acl_len = buflen,
3968 };
663c79b3
BH		 3969 struct nfs_getaclres res = {
3970 .acl_len = buflen,
3971 };
aa1870af
BF		 3972 struct rpc_message msg = {
3973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3974 .rpc_argp = &args,
663c79b3 3975 .rpc_resp = &res,
aa1870af 3976 };
21f498c2
TM		 3977 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3978 int ret = -ENOMEM, i;
aa1870af 3979
bf118a34
AA		 3980 /* As long as we're doing a round trip to the server anyway,
3981 * let's be prepared for a page of acl data. */
3982 if (npages == 0)
3983 npages = 1;
21f498c2
TM		 3984 if (npages > ARRAY_SIZE(pages))
3985 return -ERANGE;
5a006899 3986
bf118a34
AA		 3987 for (i = 0; i < npages; i++) {
3988 pages[i] = alloc_page(GFP_KERNEL);
3989 if (!pages[i])
3990 goto out_free;
e50a1c2e 3991 }
5a006899
SP		 3992
3993 /* for decoding across pages */
3994 res.acl_scratch = alloc_page(GFP_KERNEL);
3995 if (!res.acl_scratch)
3996 goto out_free;
3997
bf118a34
AA		 3998 args.acl_len = npages * PAGE_SIZE;
3999 args.acl_pgbase = 0;
5a006899 4000
de040bec 4001 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4002 __func__, buf, buflen, npages, args.acl_len);
4003 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4004 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4005 if (ret)
4006 goto out_free;
bf118a34 4007
1f1ea6c2
TM		 4008 /* Handle the case where the passed-in buffer is too short */
4009 if (res.acl_flags & NFS4_ACL_TRUNC) {
4010 /* Did the user only issue a request for the acl length? */
4011 if (buf == NULL)
4012 goto out_ok;
e50a1c2e 4013 ret = -ERANGE;
1f1ea6c2 4014 goto out_free;
e50a1c2e 4015 }
1f1ea6c2 4016 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4017 if (buf) {
4018 if (res.acl_len > buflen) {
4019 ret = -ERANGE;
4020 goto out_free;
4021 }
1f1ea6c2 4022 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4023 }
1f1ea6c2
TM		 4024out_ok:
4025 ret = res.acl_len;
e50a1c2e 4026out_free:
bf118a34
AA		 4027 for (i = 0; i < npages; i++)
4028 if (pages[i])
4029 __free_page(pages[i]);
331818f1
TM		 4030 if (res.acl_scratch)
4031 __free_page(res.acl_scratch);
aa1870af
BF		 4032 return ret;
4033}
4034
16b4289c
TM		 4035static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4036{
4037 struct nfs4_exception exception = { };
4038 ssize_t ret;
4039 do {
4040 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4041 if (ret >= 0)
4042 break;
4043 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4044 } while (exception.retry);
4045 return ret;
4046}
4047
e50a1c2e
BF		 4048static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4049{
4050 struct nfs_server *server = NFS_SERVER(inode);
4051 int ret;
4052
4053 if (!nfs4_server_supports_acls(server))
4054 return -EOPNOTSUPP;
4055 ret = nfs_revalidate_inode(server, inode);
4056 if (ret < 0)
4057 return ret;
08a22b39
AK		 4058 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4059 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4060 ret = nfs4_read_cached_acl(inode, buf, buflen);
4061 if (ret != -ENOENT)
bf118a34
AA		 4062 /* -ENOENT is returned if there is no ACL or if there is an ACL
4063 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4064 return ret;
4065 return nfs4_get_acl_uncached(inode, buf, buflen);
4066}
4067
16b4289c 4068static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4069{
4070 struct nfs_server *server = NFS_SERVER(inode);
4071 struct page *pages[NFS4ACL_MAXPAGES];
4072 struct nfs_setaclargs arg = {
4073 .fh = NFS_FH(inode),
4074 .acl_pages = pages,
4075 .acl_len = buflen,
4076 };
73c403a9 4077 struct nfs_setaclres res;
4b580ee3
BF		 4078 struct rpc_message msg = {
4079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4080 .rpc_argp = &arg,
73c403a9 4081 .rpc_resp = &res,
4b580ee3 4082 };
21f498c2 4083 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4084 int ret, i;
4b580ee3
BF		 4085
4086 if (!nfs4_server_supports_acls(server))
4087 return -EOPNOTSUPP;
21f498c2
TM		 4088 if (npages > ARRAY_SIZE(pages))
4089 return -ERANGE;
e9e3d724
NH		 4090 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4091 if (i < 0)
4092 return i;
57ec14c5 4093 nfs4_inode_return_delegation(inode);
7c513058 4094 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4095
4096 /*
4097 * Free each page after tx, so the only ref left is
4098 * held by the network stack
4099 */
4100 for (; i > 0; i--)
4101 put_page(pages[i-1]);
4102
08a22b39
AK		 4103 /*
4104 * Acl update can result in inode attribute update.
4105 * so mark the attribute cache invalid.
4106 */
4107 spin_lock(&inode->i_lock);
4108 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4109 spin_unlock(&inode->i_lock);
f41f7418
TM		 4110 nfs_access_zap_cache(inode);
4111 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4112 return ret;
4113}
4114
16b4289c
TM		 4115static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4116{
4117 struct nfs4_exception exception = { };
4118 int err;
4119 do {
4120 err = nfs4_handle_exception(NFS_SERVER(inode),
4121 __nfs4_proc_set_acl(inode, buf, buflen),
4122 &exception);
4123 } while (exception.retry);
4124 return err;
4125}
4126
1da177e4 4127static int
aa5190d0 4128nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4129{
aa5190d0
TM		 4130 struct nfs_client *clp = server->nfs_client;
4131
4132 if (task->tk_status >= 0)
1da177e4
LT		 4133 return 0;
4134 switch(task->tk_status) {
a1d0b5ee 4135 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4136 case -NFS4ERR_ADMIN_REVOKED:
4137 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4138 if (state == NULL)
4139 break;
4140 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4141 case -NFS4ERR_OPENMODE:
4142 if (state == NULL)
4143 break;
5d422301
TM		 4144 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4145 goto stateid_invalid;
0400a6b0 4146 goto wait_on_recovery;
0ced63d1 4147 case -NFS4ERR_EXPIRED:
5d422301
TM		 4148 if (state != NULL) {
4149 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4150 goto stateid_invalid;
4151 }
1da177e4 4152 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4153 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4154 nfs4_schedule_lease_recovery(clp);
4155 goto wait_on_recovery;
4745e315
AA		 4156#if defined(CONFIG_NFS_V4_1)
4157 case -NFS4ERR_BADSESSION:
4158 case -NFS4ERR_BADSLOT:
4159 case -NFS4ERR_BAD_HIGH_SLOT:
4160 case -NFS4ERR_DEADSESSION:
4161 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4162 case -NFS4ERR_SEQ_FALSE_RETRY:
4163 case -NFS4ERR_SEQ_MISORDERED:
4164 dprintk("%s ERROR %d, Reset session\n", __func__,
4165 task->tk_status);
9f594791 4166 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4167 task->tk_status = 0;
4168 return -EAGAIN;
4169#endif /* CONFIG_NFS_V4_1 */
1da177e4 4170 case -NFS4ERR_DELAY:
aa5190d0 4171 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4172 case -NFS4ERR_GRACE:
1da177e4
LT		 4173 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4174 task->tk_status = 0;
4175 return -EAGAIN;
a8a4ae3a 4176 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4177 case -NFS4ERR_OLD_STATEID:
4178 task->tk_status = 0;
4179 return -EAGAIN;
4180 }
4181 task->tk_status = nfs4_map_errors(task->tk_status);
4182 return 0;
5d422301
TM		 4183stateid_invalid:
4184 task->tk_status = -EIO;
4185 return 0;
0400a6b0 4186wait_on_recovery:
a2c0b9e2 4187 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4188 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4189 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4190 task->tk_status = 0;
4191 return -EAGAIN;
1da177e4
LT		 4192}
4193
f092075d
CL		 4194static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4195 nfs4_verifier *bootverf)
cd93710e
CL		 4196{
4197 __be32 verf[2];
4198
2c820d9a
CL		 4199 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4200 /* An impossible timestamp guarantees this value
4201 * will never match a generated boot time. */
4202 verf[0] = 0;
4203 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4204 } else {
f092075d
CL		 4205 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4206 verf[0] = (__be32)nn->boot_time.tv_sec;
4207 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4208 }
cd93710e
CL		 4209 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4210}
4211
e984a55a
CL		 4212static unsigned int
4213nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4214 char *buf, size_t len)
4215{
4216 unsigned int result;
4217
4218 rcu_read_lock();
4219 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4220 clp->cl_ipaddr,
4221 rpc_peeraddr2str(clp->cl_rpcclient,
4222 RPC_DISPLAY_ADDR),
4223 rpc_peeraddr2str(clp->cl_rpcclient,
4224 RPC_DISPLAY_PROTO));
4225 rcu_read_unlock();
4226 return result;
4227}
4228
4229static unsigned int
4230nfs4_init_uniform_client_string(const struct nfs_client *clp,
4231 char *buf, size_t len)
4232{
6f2ea7f2
CL		 4233 char *nodename = clp->cl_rpcclient->cl_nodename;
4234
4235 if (nfs4_client_id_uniquifier[0] != '\0')
4236 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4237 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4238 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4239 nodename);
e984a55a
CL		 4240}
4241
6bbb4ae8
CL		 4242/**
4243 * nfs4_proc_setclientid - Negotiate client ID
4244 * @clp: state data structure
4245 * @program: RPC program for NFSv4 callback service
4246 * @port: IP port number for NFS4 callback service
4247 * @cred: RPC credential to use for this call
4248 * @res: where to place the result
4249 *
4250 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4251 */
bb8b27e5
TM		 4252int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4253 unsigned short port, struct rpc_cred *cred,
4254 struct nfs4_setclientid_res *res)
1da177e4
LT		 4255{
4256 nfs4_verifier sc_verifier;
4257 struct nfs4_setclientid setclientid = {
4258 .sc_verifier = &sc_verifier,
4259 .sc_prog = program,
f4eecd5d 4260 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4261 };
4262 struct rpc_message msg = {
4263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4264 .rpc_argp = &setclientid,
bb8b27e5 4265 .rpc_resp = res,
286d7d6a 4266 .rpc_cred = cred,
1da177e4 4267 };
6bbb4ae8 4268 int status;
1da177e4 4269
de734831 4270 /* nfs_client_id4 */
f092075d 4271 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4272 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4273 setclientid.sc_name_len =
4274 nfs4_init_uniform_client_string(clp,
4275 setclientid.sc_name,
4276 sizeof(setclientid.sc_name));
4277 else
4278 setclientid.sc_name_len =
4279 nfs4_init_nonuniform_client_string(clp,
4280 setclientid.sc_name,
4281 sizeof(setclientid.sc_name));
de734831 4282 /* cb_client4 */
e984a55a 4283 rcu_read_lock();
de734831 4284 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4285 sizeof(setclientid.sc_netid),
4286 rpc_peeraddr2str(clp->cl_rpcclient,
4287 RPC_DISPLAY_NETID));
de734831
CL		 4288 rcu_read_unlock();
4289 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4290 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4291 clp->cl_ipaddr, port >> 8, port & 255);
4292
6bbb4ae8
CL		 4293 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4294 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4295 setclientid.sc_name_len, setclientid.sc_name);
4296 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4297 dprintk("NFS reply setclientid: %d\n", status);
4298 return status;
1da177e4
LT		 4299}
4300
6bbb4ae8
CL		 4301/**
4302 * nfs4_proc_setclientid_confirm - Confirm client ID
4303 * @clp: state data structure
4304 * @res: result of a previous SETCLIENTID
4305 * @cred: RPC credential to use for this call
4306 *
4307 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4308 */
fd954ae1 4309int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4310 struct nfs4_setclientid_res *arg,
4311 struct rpc_cred *cred)
1da177e4 4312{
1da177e4
LT		 4313 struct rpc_message msg = {
4314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4315 .rpc_argp = arg,
286d7d6a 4316 .rpc_cred = cred,
1da177e4 4317 };
1da177e4
LT		 4318 int status;
4319
6bbb4ae8
CL		 4320 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4321 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4322 clp->cl_clientid);
1bd714f2 4323 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4324 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4325 return status;
4326}
4327
fe650407
TM		 4328struct nfs4_delegreturndata {
4329 struct nfs4_delegreturnargs args;
fa178f29 4330 struct nfs4_delegreturnres res;
fe650407
TM		 4331 struct nfs_fh fh;
4332 nfs4_stateid stateid;
26e976a8 4333 unsigned long timestamp;
fa178f29 4334 struct nfs_fattr fattr;
fe650407
TM		 4335 int rpc_status;
4336};
4337
fe650407
TM		 4338static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4339{
4340 struct nfs4_delegreturndata *data = calldata;
938e1010 4341
14516c3a
TM		 4342 if (!nfs4_sequence_done(task, &data->res.seq_res))
4343 return;
938e1010 4344
79708861
RL		 4345 switch (task->tk_status) {
4346 case -NFS4ERR_STALE_STATEID:
4347 case -NFS4ERR_EXPIRED:
4348 case 0:
fa178f29 4349 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4350 break;
4351 default:
4352 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4353 -EAGAIN) {
d00c5d43 4354 rpc_restart_call_prepare(task);
79708861
RL		 4355 return;
4356 }
4357 }
4358 data->rpc_status = task->tk_status;
fe650407
TM		 4359}
4360
4361static void nfs4_delegreturn_release(void *calldata)
4362{
fe650407
TM		 4363 kfree(calldata);
4364}
4365
938e1010
AA		 4366#if defined(CONFIG_NFS_V4_1)
4367static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4368{
4369 struct nfs4_delegreturndata *d_data;
4370
4371 d_data = (struct nfs4_delegreturndata *)data;
4372
d9afbd1b
TM		 4373 nfs4_setup_sequence(d_data->res.server,
4374 &d_data->args.seq_args,
4375 &d_data->res.seq_res,
4376 task);
938e1010
AA		 4377}
4378#endif /* CONFIG_NFS_V4_1 */
4379
c8d149f3 4380static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4381#if defined(CONFIG_NFS_V4_1)
4382 .rpc_call_prepare = nfs4_delegreturn_prepare,
4383#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4384 .rpc_call_done = nfs4_delegreturn_done,
4385 .rpc_release = nfs4_delegreturn_release,
4386};
4387
e6f81075 4388static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4389{
4390 struct nfs4_delegreturndata *data;
fa178f29 4391 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4392 struct rpc_task *task;
5138fde0
TM		 4393 struct rpc_message msg = {
4394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4395 .rpc_cred = cred,
4396 };
c970aa85
TM		 4397 struct rpc_task_setup task_setup_data = {
4398 .rpc_client = server->client,
5138fde0 4399 .rpc_message = &msg,
c970aa85
TM		 4400 .callback_ops = &nfs4_delegreturn_ops,
4401 .flags = RPC_TASK_ASYNC,
4402 };
e6f81075 4403 int status = 0;
fe650407 4404
8535b2be 4405 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4406 if (data == NULL)
4407 return -ENOMEM;
9d12b216 4408 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4409 data->args.fhandle = &data->fh;
4410 data->args.stateid = &data->stateid;
9e907fec 4411 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4412 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4413 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4414 data->res.fattr = &data->fattr;
4415 data->res.server = server;
5138fde0 4416 nfs_fattr_init(data->res.fattr);
26e976a8 4417 data->timestamp = jiffies;
fe650407
TM		 4418 data->rpc_status = 0;
4419
c970aa85 4420 task_setup_data.callback_data = data;
1174dd1f
TM		 4421 msg.rpc_argp = &data->args;
4422 msg.rpc_resp = &data->res;
c970aa85 4423 task = rpc_run_task(&task_setup_data);
7a1218a2 4424 if (IS_ERR(task))
fe650407 4425 return PTR_ERR(task);
e6f81075
TM		 4426 if (!issync)
4427 goto out;
fe650407 4428 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4429 if (status != 0)
4430 goto out;
4431 status = data->rpc_status;
e144cbcc
TM		 4432 if (status == 0)
4433 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4434 else
4435 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4436out:
e6b3c4db 4437 rpc_put_task(task);
fe650407 4438 return status;
1da177e4
LT		 4439}
4440
e6f81075 4441int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4442{
4443 struct nfs_server *server = NFS_SERVER(inode);
4444 struct nfs4_exception exception = { };
4445 int err;
4446 do {
e6f81075 4447 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4448 switch (err) {
4449 case -NFS4ERR_STALE_STATEID:
4450 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4451 case 0:
4452 return 0;
4453 }
4454 err = nfs4_handle_exception(server, err, &exception);
4455 } while (exception.retry);
4456 return err;
4457}
4458
4459#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4460#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4461
4462/*
4463 * sleep, with exponential backoff, and retry the LOCK operation.
4464 */
4465static unsigned long
4466nfs4_set_lock_task_retry(unsigned long timeout)
4467{
d310310c 4468 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4469 timeout <<= 1;
4470 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4471 return NFS4_LOCK_MAXTIMEOUT;
4472 return timeout;
4473}
4474
1da177e4
LT		 4475static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4476{
4477 struct inode *inode = state->inode;
4478 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4479 struct nfs_client *clp = server->nfs_client;
911d1aaf 4480 struct nfs_lockt_args arg = {
1da177e4 4481 .fh = NFS_FH(inode),
911d1aaf 4482 .fl = request,
1da177e4 4483 };
911d1aaf
TM		 4484 struct nfs_lockt_res res = {
4485 .denied = request,
1da177e4
LT		 4486 };
4487 struct rpc_message msg = {
4488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4489 .rpc_argp = &arg,
4490 .rpc_resp = &res,
4491 .rpc_cred = state->owner->so_cred,
4492 };
1da177e4
LT		 4493 struct nfs4_lock_state *lsp;
4494 int status;
4495
911d1aaf 4496 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4497 status = nfs4_set_lock_state(state, request);
4498 if (status != 0)
4499 goto out;
4500 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4501 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4502 arg.lock_owner.s_dev = server->s_dev;
7c513058 4503 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4504 switch (status) {
4505 case 0:
4506 request->fl_type = F_UNLCK;
4507 break;
4508 case -NFS4ERR_DENIED:
4509 status = 0;
1da177e4 4510 }
70cc6487 4511 request->fl_ops->fl_release_private(request);
8d0a8a9d 4512out:
1da177e4
LT		 4513 return status;
4514}
4515
4516static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4517{
4518 struct nfs4_exception exception = { };
4519 int err;
4520
4521 do {
4522 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4523 _nfs4_proc_getlk(state, cmd, request),
4524 &exception);
4525 } while (exception.retry);
4526 return err;
4527}
4528
4529static int do_vfs_lock(struct file *file, struct file_lock *fl)
4530{
4531 int res = 0;
4532 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4533 case FL_POSIX:
4534 res = posix_lock_file_wait(file, fl);
4535 break;
4536 case FL_FLOCK:
4537 res = flock_lock_file_wait(file, fl);
4538 break;
4539 default:
4540 BUG();
4541 }
1da177e4
LT		 4542 return res;
4543}
4544
faf5f49c 4545struct nfs4_unlockdata {
911d1aaf
TM		 4546 struct nfs_locku_args arg;
4547 struct nfs_locku_res res;
faf5f49c
TM		 4548 struct nfs4_lock_state *lsp;
4549 struct nfs_open_context *ctx;
911d1aaf
TM		 4550 struct file_lock fl;
4551 const struct nfs_server *server;
26e976a8 4552 unsigned long timestamp;
faf5f49c
TM		 4553};
4554
911d1aaf
TM		 4555static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4556 struct nfs_open_context *ctx,
4557 struct nfs4_lock_state *lsp,
4558 struct nfs_seqid *seqid)
4559{
4560 struct nfs4_unlockdata *p;
4561 struct inode *inode = lsp->ls_state->inode;
4562
8535b2be 4563 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4564 if (p == NULL)
4565 return NULL;
4566 p->arg.fh = NFS_FH(inode);
4567 p->arg.fl = &p->fl;
4568 p->arg.seqid = seqid;
c1d51931 4569 p->res.seqid = seqid;
911d1aaf
TM		 4570 p->arg.stateid = &lsp->ls_stateid;
4571 p->lsp = lsp;
4572 atomic_inc(&lsp->ls_count);
4573 /* Ensure we don't close file until we're done freeing locks! */
4574 p->ctx = get_nfs_open_context(ctx);
4575 memcpy(&p->fl, fl, sizeof(p->fl));
4576 p->server = NFS_SERVER(inode);
4577 return p;
4578}
4579
06f814a3 4580static void nfs4_locku_release_calldata(void *data)
faf5f49c 4581{
963d8fe5 4582 struct nfs4_unlockdata *calldata = data;
911d1aaf 4583 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4584 nfs4_put_lock_state(calldata->lsp);
4585 put_nfs_open_context(calldata->ctx);
4586 kfree(calldata);
faf5f49c
TM		 4587}
4588
963d8fe5 4589static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4590{
963d8fe5 4591 struct nfs4_unlockdata *calldata = data;
faf5f49c 4592
14516c3a
TM		 4593 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4594 return;
faf5f49c
TM		 4595 switch (task->tk_status) {
4596 case 0:
f597c537
TM		 4597 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4598 &calldata->res.stateid);
26e976a8 4599 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4600 break;
9e33bed5
TM		 4601 case -NFS4ERR_BAD_STATEID:
4602 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4603 case -NFS4ERR_STALE_STATEID:
4604 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4605 break;
4606 default:
9e33bed5 4607 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4608 rpc_restart_call_prepare(task);
faf5f49c 4609 }
2b1bc308 4610 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4611}
4612
4ce70ada 4613static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4614{
4ce70ada 4615 struct nfs4_unlockdata *calldata = data;
faf5f49c 4616
911d1aaf 4617 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4618 goto out_wait;
795a88c9 4619 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4620 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4621 goto out_no_action;
faf5f49c 4622 }
26e976a8 4623 calldata->timestamp = jiffies;
035168ab 4624 if (nfs4_setup_sequence(calldata->server,
a893693c 4625 &calldata->arg.seq_args,
2240a9e2
TM		 4626 &calldata->res.seq_res,
4627 task) != 0)
4628 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4629 return;
4630out_no_action:
4631 task->tk_action = NULL;
4632out_wait:
4633 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4634}
4635
963d8fe5 4636static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4637 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4638 .rpc_call_done = nfs4_locku_done,
06f814a3 4639 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4640};
4641
a5d16a4d
TM		 4642static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4643 struct nfs_open_context *ctx,
4644 struct nfs4_lock_state *lsp,
4645 struct nfs_seqid *seqid)
4646{
4647 struct nfs4_unlockdata *data;
5138fde0
TM		 4648 struct rpc_message msg = {
4649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4650 .rpc_cred = ctx->cred,
4651 };
c970aa85
TM		 4652 struct rpc_task_setup task_setup_data = {
4653 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4654 .rpc_message = &msg,
c970aa85 4655 .callback_ops = &nfs4_locku_ops,
101070ca 4656 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4657 .flags = RPC_TASK_ASYNC,
4658 };
a5d16a4d 4659
137d6aca
FF		 4660 /* Ensure this is an unlock - when canceling a lock, the
4661 * canceled lock is passed in, and it won't be an unlock.
4662 */
4663 fl->fl_type = F_UNLCK;
4664
a5d16a4d
TM		 4665 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4666 if (data == NULL) {
4667 nfs_free_seqid(seqid);
4668 return ERR_PTR(-ENOMEM);
4669 }
4670
9d12b216 4671 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4672 msg.rpc_argp = &data->arg;
4673 msg.rpc_resp = &data->res;
c970aa85
TM		 4674 task_setup_data.callback_data = data;
4675 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4676}
4677
faf5f49c
TM		 4678static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4679{
65b62a29
TM		 4680 struct inode *inode = state->inode;
4681 struct nfs4_state_owner *sp = state->owner;
4682 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4683 struct nfs_seqid *seqid;
1da177e4 4684 struct nfs4_lock_state *lsp;
06f814a3
TM		 4685 struct rpc_task *task;
4686 int status = 0;
536ff0f8 4687 unsigned char fl_flags = request->fl_flags;
faf5f49c 4688
8d0a8a9d 4689 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4690 /* Unlock _before_ we do the RPC call */
4691 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4692 /* Exclude nfs_delegation_claim_locks() */
4693 mutex_lock(&sp->so_delegreturn_mutex);
4694 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4695 down_read(&nfsi->rwsem);
4696 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4697 up_read(&nfsi->rwsem);
65b62a29 4698 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4699 goto out;
19e03c57
TM		 4700 }
4701 up_read(&nfsi->rwsem);
65b62a29 4702 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4703 if (status != 0)
9b073574
TM		 4704 goto out;
4705 /* Is this a delegated lock? */
4706 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4707 goto out;
8d0a8a9d 4708 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4709 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4710 status = -ENOMEM;
911d1aaf 4711 if (seqid == NULL)
9b073574 4712 goto out;
cd3758e3 4713 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4714 status = PTR_ERR(task);
4715 if (IS_ERR(task))
9b073574 4716 goto out;
a5d16a4d 4717 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4718 rpc_put_task(task);
9b073574 4719out:
536ff0f8 4720 request->fl_flags = fl_flags;
1da177e4
LT		 4721 return status;
4722}
4723
a5d16a4d
TM		 4724struct nfs4_lockdata {
4725 struct nfs_lock_args arg;
4726 struct nfs_lock_res res;
4727 struct nfs4_lock_state *lsp;
4728 struct nfs_open_context *ctx;
4729 struct file_lock fl;
26e976a8 4730 unsigned long timestamp;
a5d16a4d
TM		 4731 int rpc_status;
4732 int cancelled;
66179efe 4733 struct nfs_server *server;
a5d16a4d
TM		 4734};
4735
4736static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4737 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4738 gfp_t gfp_mask)
1da177e4 4739{
a5d16a4d
TM		 4740 struct nfs4_lockdata *p;
4741 struct inode *inode = lsp->ls_state->inode;
1da177e4 4742 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4743
8535b2be 4744 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4745 if (p == NULL)
4746 return NULL;
4747
4748 p->arg.fh = NFS_FH(inode);
4749 p->arg.fl = &p->fl;
8535b2be 4750 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4751 if (p->arg.open_seqid == NULL)
4752 goto out_free;
8535b2be 4753 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4754 if (p->arg.lock_seqid == NULL)
2f74c0a0 4755 goto out_free_seqid;
a5d16a4d 4756 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4757 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4758 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4759 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4760 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4761 p->lsp = lsp;
66179efe 4762 p->server = server;
a5d16a4d
TM		 4763 atomic_inc(&lsp->ls_count);
4764 p->ctx = get_nfs_open_context(ctx);
4765 memcpy(&p->fl, fl, sizeof(p->fl));
4766 return p;
2f74c0a0
TM		 4767out_free_seqid:
4768 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4769out_free:
4770 kfree(p);
4771 return NULL;
4772}
4773
4774static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4775{
4776 struct nfs4_lockdata *data = calldata;
4777 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4778
3110ff80 4779 dprintk("%s: begin!\n", __func__);
2f74c0a0 4780 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4781 goto out_wait;
a5d16a4d
TM		 4782 /* Do we need to do an open_to_lock_owner? */
4783 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4784 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4785 goto out_release_lock_seqid;
8fe72bac 4786 }
a5d16a4d
TM		 4787 data->arg.open_stateid = &state->stateid;
4788 data->arg.new_lock_owner = 1;
c1d51931 4789 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4790 } else
4791 data->arg.new_lock_owner = 0;
5d422301
TM		 4792 if (!nfs4_valid_open_stateid(state)) {
4793 data->rpc_status = -EBADF;
4794 task->tk_action = NULL;
4795 goto out_release_open_seqid;
4796 }
26e976a8 4797 data->timestamp = jiffies;
035168ab
TM		 4798 if (nfs4_setup_sequence(data->server,
4799 &data->arg.seq_args,
2240a9e2 4800 &data->res.seq_res,
d9afbd1b 4801 task) == 0)
66179efe 4802 return;
5d422301 4803out_release_open_seqid:
2240a9e2
TM		 4804 nfs_release_seqid(data->arg.open_seqid);
4805out_release_lock_seqid:
4806 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4807out_wait:
4808 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4809 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4810}
4811
a5d16a4d
TM		 4812static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4813{
4814 struct nfs4_lockdata *data = calldata;
4815
3110ff80 4816 dprintk("%s: begin!\n", __func__);
a5d16a4d 4817
14516c3a
TM		 4818 if (!nfs4_sequence_done(task, &data->res.seq_res))
4819 return;
66179efe 4820
a5d16a4d 4821 data->rpc_status = task->tk_status;
a5d16a4d 4822 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4823 if (data->rpc_status == 0)
4824 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4825 else
4826 goto out;
4827 }
4828 if (data->rpc_status == 0) {
f597c537 4829 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4830 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4831 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4832 }
a5d16a4d 4833out:
3110ff80 4834 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4835}
4836
4837static void nfs4_lock_release(void *calldata)
4838{
4839 struct nfs4_lockdata *data = calldata;
4840
3110ff80 4841 dprintk("%s: begin!\n", __func__);
2f74c0a0 4842 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4843 if (data->cancelled != 0) {
4844 struct rpc_task *task;
4845 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4846 data->arg.lock_seqid);
4847 if (!IS_ERR(task))
bf294b41 4848 rpc_put_task_async(task);
3110ff80 4849 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4850 } else
4851 nfs_free_seqid(data->arg.lock_seqid);
4852 nfs4_put_lock_state(data->lsp);
4853 put_nfs_open_context(data->ctx);
4854 kfree(data);
3110ff80 4855 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4856}
4857
4858static const struct rpc_call_ops nfs4_lock_ops = {
4859 .rpc_call_prepare = nfs4_lock_prepare,
4860 .rpc_call_done = nfs4_lock_done,
4861 .rpc_release = nfs4_lock_release,
4862};
4863
2bee72a6
TM		 4864static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4865{
2bee72a6
TM		 4866 switch (error) {
4867 case -NFS4ERR_ADMIN_REVOKED:
4868 case -NFS4ERR_BAD_STATEID:
ecac799a 4869 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4870 if (new_lock_owner != 0 ||
795a88c9 4871 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4872 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4873 break;
4874 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4875 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4876 case -NFS4ERR_EXPIRED:
4877 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4878 };
4879}
4880
afe6c27c 4881static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4882{
4883 struct nfs4_lockdata *data;
4884 struct rpc_task *task;
5138fde0
TM		 4885 struct rpc_message msg = {
4886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4887 .rpc_cred = state->owner->so_cred,
4888 };
c970aa85
TM		 4889 struct rpc_task_setup task_setup_data = {
4890 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4891 .rpc_message = &msg,
c970aa85 4892 .callback_ops = &nfs4_lock_ops,
101070ca 4893 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4894 .flags = RPC_TASK_ASYNC,
4895 };
a5d16a4d
TM		 4896 int ret;
4897
3110ff80 4898 dprintk("%s: begin!\n", __func__);
cd3758e3 4899 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4900 fl->fl_u.nfs4_fl.owner,
4901 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4902 if (data == NULL)
4903 return -ENOMEM;
4904 if (IS_SETLKW(cmd))
4905 data->arg.block = 1;
9d12b216 4906 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4907 msg.rpc_argp = &data->arg;
4908 msg.rpc_resp = &data->res;
c970aa85 4909 task_setup_data.callback_data = data;
8fe72bac
TM		 4910 if (recovery_type > NFS_LOCK_NEW) {
4911 if (recovery_type == NFS_LOCK_RECLAIM)
4912 data->arg.reclaim = NFS_LOCK_RECLAIM;
4913 nfs4_set_sequence_privileged(&data->arg.seq_args);
4914 }
c970aa85 4915 task = rpc_run_task(&task_setup_data);
7a1218a2 4916 if (IS_ERR(task))
a5d16a4d 4917 return PTR_ERR(task);
a5d16a4d
TM		 4918 ret = nfs4_wait_for_completion_rpc_task(task);
4919 if (ret == 0) {
4920 ret = data->rpc_status;
2bee72a6
TM		 4921 if (ret)
4922 nfs4_handle_setlk_error(data->server, data->lsp,
4923 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4924 } else
4925 data->cancelled = 1;
e6b3c4db 4926 rpc_put_task(task);
3110ff80 4927 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4928 return ret;
1da177e4
LT		 4929}
4930
4931static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4932{
202b50dc 4933 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4934 struct nfs4_exception exception = {
4935 .inode = state->inode,
4936 };
202b50dc
TM		 4937 int err;
4938
4939 do {
42a2d13e
TM		 4940 /* Cache the lock if possible... */
4941 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4942 return 0;
afe6c27c 4943 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4944 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4945 break;
4946 nfs4_handle_exception(server, err, &exception);
4947 } while (exception.retry);
4948 return err;
1da177e4
LT		 4949}
4950
4951static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4952{
202b50dc 4953 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4954 struct nfs4_exception exception = {
4955 .inode = state->inode,
4956 };
202b50dc
TM		 4957 int err;
4958
6bfc93ef
TM		 4959 err = nfs4_set_lock_state(state, request);
4960 if (err != 0)
4961 return err;
202b50dc 4962 do {
42a2d13e
TM		 4963 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4964 return 0;
afe6c27c 4965 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4966 switch (err) {
4967 default:
4968 goto out;
4969 case -NFS4ERR_GRACE:
4970 case -NFS4ERR_DELAY:
4971 nfs4_handle_exception(server, err, &exception);
4972 err = 0;
4973 }
202b50dc 4974 } while (exception.retry);
a9ed2e25 4975out:
202b50dc 4976 return err;
1da177e4
LT		 4977}
4978
f062eb6c 4979#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4980/**
4981 * nfs41_check_expired_locks - possibly free a lock stateid
4982 *
4983 * @state: NFSv4 state for an inode
4984 *
4985 * Returns NFS_OK if recovery for this stateid is now finished.
4986 * Otherwise a negative NFS4ERR value is returned.
4987 */
b01dd1d8 4988static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4989{
eb64cf96 4990 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4991 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4992 struct nfs_server *server = NFS_SERVER(state->inode);
4993
b01dd1d8 4994 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4995 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4996 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4997 if (status != NFS_OK) {
3e60ffdd
CL		 4998 /* Free the stateid unless the server
4999 * informs us the stateid is unrecognized. */
89af2739
CL		 5000 if (status != -NFS4ERR_BAD_STATEID)
5001 nfs41_free_stateid(server,
5002 &lsp->ls_stateid);
795a88c9 5003 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5004 ret = status;
5005 }
5006 }
5007 };
5008
5009 return ret;
5010}
5011
5012static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5013{
5014 int status = NFS_OK;
5015
5016 if (test_bit(LK_STATE_IN_USE, &state->flags))
5017 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5018 if (status != NFS_OK)
5019 status = nfs4_lock_expired(state, request);
5020 return status;
f062eb6c
BS		 5021}
5022#endif
5023
1da177e4
LT		 5024static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5025{
9a99af49 5026 struct nfs4_state_owner *sp = state->owner;
19e03c57 5027 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5028 unsigned char fl_flags = request->fl_flags;
9a99af49 5029 unsigned int seq;
8e469ebd 5030 int status = -ENOLCK;
1da177e4 5031
8e469ebd
TM		 5032 if ((fl_flags & FL_POSIX) &&
5033 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5034 goto out;
6bfc93ef 5035 /* Is this a delegated open? */
6bfc93ef
TM		 5036 status = nfs4_set_lock_state(state, request);
5037 if (status != 0)
5038 goto out;
01c3b861
TM		 5039 request->fl_flags |= FL_ACCESS;
5040 status = do_vfs_lock(request->fl_file, request);
5041 if (status < 0)
5042 goto out;
19e03c57 5043 down_read(&nfsi->rwsem);
01c3b861 5044 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5045 /* Yes: cache locks! */
01c3b861 5046 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5047 request->fl_flags = fl_flags & ~FL_SLEEP;
5048 status = do_vfs_lock(request->fl_file, request);
5049 goto out_unlock;
01c3b861 5050 }
9a99af49
TM		 5051 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5052 up_read(&nfsi->rwsem);
afe6c27c 5053 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5054 if (status != 0)
9a99af49
TM		 5055 goto out;
5056 down_read(&nfsi->rwsem);
5057 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5058 status = -NFS4ERR_DELAY;
01c3b861 5059 goto out_unlock;
9a99af49 5060 }
6bfc93ef 5061 /* Note: we always want to sleep here! */
01c3b861 5062 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5063 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5064 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5065 "manager!\n", __func__);
01c3b861 5066out_unlock:
19e03c57 5067 up_read(&nfsi->rwsem);
01c3b861
TM		 5068out:
5069 request->fl_flags = fl_flags;
1da177e4
LT		 5070 return status;
5071}
5072
5073static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5074{
a1d0b5ee
TM		 5075 struct nfs4_exception exception = {
5076 .state = state,
05ffe24f 5077 .inode = state->inode,
a1d0b5ee 5078 };
1da177e4
LT		 5079 int err;
5080
5081 do {
965b5d67
TM		 5082 err = _nfs4_proc_setlk(state, cmd, request);
5083 if (err == -NFS4ERR_DENIED)
5084 err = -EAGAIN;
1da177e4 5085 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5086 err, &exception);
1da177e4
LT		 5087 } while (exception.retry);
5088 return err;
5089}
5090
5091static int
5092nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5093{
5094 struct nfs_open_context *ctx;
5095 struct nfs4_state *state;
5096 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5097 int status;
5098
5099 /* verify open state */
cd3758e3 5100 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5101 state = ctx->state;
5102
5103 if (request->fl_start < 0 || request->fl_end < 0)
5104 return -EINVAL;
5105
d953126a
TM		 5106 if (IS_GETLK(cmd)) {
5107 if (state != NULL)
5108 return nfs4_proc_getlk(state, F_GETLK, request);
5109 return 0;
5110 }
1da177e4
LT		 5111
5112 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5113 return -EINVAL;
5114
d953126a
TM		 5115 if (request->fl_type == F_UNLCK) {
5116 if (state != NULL)
5117 return nfs4_proc_unlck(state, cmd, request);
5118 return 0;
5119 }
1da177e4 5120
d953126a
TM		 5121 if (state == NULL)
5122 return -ENOLCK;
55725513
TM		 5123 /*
5124 * Don't rely on the VFS having checked the file open mode,
5125 * since it won't do this for flock() locks.
5126 */
f44106e2 5127 switch (request->fl_type) {
55725513
TM		 5128 case F_RDLCK:
5129 if (!(filp->f_mode & FMODE_READ))
5130 return -EBADF;
5131 break;
5132 case F_WRLCK:
5133 if (!(filp->f_mode & FMODE_WRITE))
5134 return -EBADF;
5135 }
5136
1da177e4
LT		 5137 do {
5138 status = nfs4_proc_setlk(state, cmd, request);
5139 if ((status != -EAGAIN) || IS_SETLK(cmd))
5140 break;
5141 timeout = nfs4_set_lock_task_retry(timeout);
5142 status = -ERESTARTSYS;
5143 if (signalled())
5144 break;
5145 } while(status < 0);
1da177e4
LT		 5146 return status;
5147}
5148
888e694c
TM		 5149int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5150{
5151 struct nfs_server *server = NFS_SERVER(state->inode);
5152 struct nfs4_exception exception = { };
5153 int err;
5154
5155 err = nfs4_set_lock_state(state, fl);
5156 if (err != 0)
5157 goto out;
5158 do {
afe6c27c 5159 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 5160 switch (err) {
5161 default:
a030889a
WAA		 5162 printk(KERN_ERR "NFS: %s: unhandled error "
5163 "%d.\n", __func__, err);
d5122201 5164 case 0:
965b5d67 5165 case -ESTALE:
d5122201 5166 goto out;
d5122201 5167 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5168 case -NFS4ERR_STALE_STATEID:
37380e42
TM		 5169 set_bit(NFS_DELEGATED_STATE, &state->flags);
5170 case -NFS4ERR_EXPIRED:
0400a6b0 5171 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 5172 err = -EAGAIN;
0400a6b0 5173 goto out;
74e7bb73
RL		 5174 case -NFS4ERR_BADSESSION:
5175 case -NFS4ERR_BADSLOT:
5176 case -NFS4ERR_BAD_HIGH_SLOT:
5177 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5178 case -NFS4ERR_DEADSESSION:
37380e42 5179 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 5180 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 5181 err = -EAGAIN;
d5122201 5182 goto out;
a1d0b5ee 5183 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5184 case -NFS4ERR_ADMIN_REVOKED:
5185 case -NFS4ERR_BAD_STATEID:
5186 case -NFS4ERR_OPENMODE:
0400a6b0 5187 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5188 err = 0;
5189 goto out;
5190 case -ENOMEM:
5191 case -NFS4ERR_DENIED:
5192 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5193 err = 0;
5194 goto out;
d5122201 5195 }
37380e42 5196 set_bit(NFS_DELEGATED_STATE, &state->flags);
888e694c
TM		 5197 err = nfs4_handle_exception(server, err, &exception);
5198 } while (exception.retry);
5199out:
5200 return err;
5201}
6b3b5496 5202
cf470c3e
TM		 5203struct nfs_release_lockowner_data {
5204 struct nfs4_lock_state *lsp;
5ae67c4f 5205 struct nfs_server *server;
cf470c3e
TM		 5206 struct nfs_release_lockowner_args args;
5207};
5208
d3c7b7cc
TM		 5209static void nfs4_release_lockowner_release(void *calldata)
5210{
cf470c3e 5211 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5212 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5213 kfree(calldata);
5214}
5215
17280175 5216static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5217 .rpc_release = nfs4_release_lockowner_release,
5218};
5219
cf470c3e 5220int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5221{
5222 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5223 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5224 struct rpc_message msg = {
5225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5226 };
5227
5228 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5229 return -EINVAL;
5230 data = kmalloc(sizeof(*data), GFP_NOFS);
5231 if (!data)
5232 return -ENOMEM;
5233 data->lsp = lsp;
5ae67c4f 5234 data->server = server;
cf470c3e
TM		 5235 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5236 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5237 data->args.lock_owner.s_dev = server->s_dev;
5238 msg.rpc_argp = &data->args;
5239 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5240 return 0;
d3c7b7cc
TM		 5241}
5242
aa1870af
BF		 5243#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5244
64c2ce8b
AK		 5245static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5246 const void *buf, size_t buflen,
5247 int flags, int type)
6b3b5496 5248{
64c2ce8b
AK		 5249 if (strcmp(key, "") != 0)
5250 return -EINVAL;
4b580ee3 5251
64c2ce8b 5252 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5253}
5254
64c2ce8b
AK		 5255static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5256 void *buf, size_t buflen, int type)
6b3b5496 5257{
64c2ce8b
AK		 5258 if (strcmp(key, "") != 0)
5259 return -EINVAL;
aa1870af 5260
64c2ce8b 5261 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5262}
5263
64c2ce8b
AK		 5264static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5265 size_t list_len, const char *name,
5266 size_t name_len, int type)
6b3b5496 5267{
64c2ce8b 5268 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5269
096455a2
BF		 5270 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5271 return 0;
64c2ce8b
AK		 5272
5273 if (list && len <= list_len)
5274 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5275 return len;
6b3b5496
BF		 5276}
5277
533eb461
AA		 5278/*
5279 * nfs_fhget will use either the mounted_on_fileid or the fileid
5280 */
69aaaae1
TM		 5281static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5282{
533eb461
AA		 5283 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5284 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5285 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5286 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5287 return;
5288
5289 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5290 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5291 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5292 fattr->nlink = 2;
5293}
5294
f05d147f
BS		 5295static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5296 const struct qstr *name,
5297 struct nfs4_fs_locations *fs_locations,
5298 struct page *page)
683b57b4
TM		 5299{
5300 struct nfs_server *server = NFS_SERVER(dir);
5301 u32 bitmask[2] = {
361e624f 5302 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5303 };
5304 struct nfs4_fs_locations_arg args = {
5305 .dir_fh = NFS_FH(dir),
c228fd3a 5306 .name = name,
683b57b4
TM		 5307 .page = page,
5308 .bitmask = bitmask,
5309 };
22958463
BH		 5310 struct nfs4_fs_locations_res res = {
5311 .fs_locations = fs_locations,
5312 };
683b57b4
TM		 5313 struct rpc_message msg = {
5314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5315 .rpc_argp = &args,
22958463 5316 .rpc_resp = &res,
683b57b4
TM		 5317 };
5318 int status;
5319
3110ff80 5320 dprintk("%s: start\n", __func__);
533eb461
AA		 5321
5322 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5323 * is not supported */
5324 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5325 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5326 else
5327 bitmask[0] |= FATTR4_WORD0_FILEID;
5328
c228fd3a 5329 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5330 fs_locations->server = server;
830b8e33 5331 fs_locations->nlocations = 0;
f05d147f 5332 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5333 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5334 return status;
5335}
5336
f05d147f
BS		 5337int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5338 const struct qstr *name,
5339 struct nfs4_fs_locations *fs_locations,
5340 struct page *page)
db0a9593
BS		 5341{
5342 struct nfs4_exception exception = { };
5343 int err;
5344 do {
5345 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5346 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5347 &exception);
5348 } while (exception.retry);
5349 return err;
5350}
5351
5a5ea0d4
BS		 5352static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5353{
5354 int status;
5355 struct nfs4_secinfo_arg args = {
5356 .dir_fh = NFS_FH(dir),
5357 .name = name,
5358 };
5359 struct nfs4_secinfo_res res = {
5360 .flavors = flavors,
5361 };
5362 struct rpc_message msg = {
5363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5364 .rpc_argp = &args,
5365 .rpc_resp = &res,
5366 };
5367
5368 dprintk("NFS call secinfo %s\n", name->name);
5369 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5370 dprintk("NFS reply secinfo: %d\n", status);
5371 return status;
5372}
5373
72de53ec
BS		 5374int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5375 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5376{
5377 struct nfs4_exception exception = { };
5378 int err;
5379 do {
5380 err = nfs4_handle_exception(NFS_SERVER(dir),
5381 _nfs4_proc_secinfo(dir, name, flavors),
5382 &exception);
5383 } while (exception.retry);
5384 return err;
5385}
5386
557134a3 5387#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5388/*
5389 * Check the exchange flags returned by the server for invalid flags, having
5390 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5391 * DS flags set.
5392 */
5393static int nfs4_check_cl_exchange_flags(u32 flags)
5394{
5395 if (flags & ~EXCHGID4_FLAG_MASK_R)
5396 goto out_inval;
5397 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5398 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5399 goto out_inval;
5400 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5401 goto out_inval;
5402 return NFS_OK;
5403out_inval:
5404 return -NFS4ERR_INVAL;
5405}
5406
78fe0f41 5407static bool
79d4e1f0
CL		 5408nfs41_same_server_scope(struct nfs41_server_scope *a,
5409 struct nfs41_server_scope *b)
78fe0f41
WAA		 5410{
5411 if (a->server_scope_sz == b->server_scope_sz &&
5412 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5413 return true;
5414
5415 return false;
5416}
5417
7c44f1ae
WAA		 5418/*
5419 * nfs4_proc_bind_conn_to_session()
5420 *
5421 * The 4.1 client currently uses the same TCP connection for the
5422 * fore and backchannel.
5423 */
2cf047c9 5424int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5425{
5426 int status;
5427 struct nfs41_bind_conn_to_session_res res;
5428 struct rpc_message msg = {
5429 .rpc_proc =
5430 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5431 .rpc_argp = clp,
5432 .rpc_resp = &res,
2cf047c9 5433 .rpc_cred = cred,
7c44f1ae
WAA		 5434 };
5435
5436 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5437
5438 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5439 if (unlikely(res.session == NULL)) {
5440 status = -ENOMEM;
5441 goto out;
5442 }
5443
5444 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5445 if (status == 0) {
5446 if (memcmp(res.session->sess_id.data,
5447 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5448 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5449 status = -EIO;
5450 goto out_session;
5451 }
5452 if (res.dir != NFS4_CDFS4_BOTH) {
5453 dprintk("NFS: %s: Unexpected direction from server\n",
5454 __func__);
5455 status = -EIO;
5456 goto out_session;
5457 }
5458 if (res.use_conn_in_rdma_mode) {
5459 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5460 __func__);
5461 status = -EIO;
5462 goto out_session;
5463 }
5464 }
5465out_session:
5466 kfree(res.session);
5467out:
5468 dprintk("<-- %s status= %d\n", __func__, status);
5469 return status;
5470}
5471
99fe60d0
BH		 5472/*
5473 * nfs4_proc_exchange_id()
5474 *
6bbb4ae8
CL		 5475 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5476 *
99fe60d0
BH		 5477 * Since the clientid has expired, all compounds using sessions
5478 * associated with the stale clientid will be returning
5479 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5480 * be in some phase of session reset.
5481 */
4d643d1d 5482int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5483{
5484 nfs4_verifier verifier;
5485 struct nfs41_exchange_id_args args = {
cd93710e 5486 .verifier = &verifier,
99fe60d0 5487 .client = clp,
357f54d6 5488 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5489 };
5490 struct nfs41_exchange_id_res res = {
32b01310 5491 0
99fe60d0
BH		 5492 };
5493 int status;
5494 struct rpc_message msg = {
5495 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5496 .rpc_argp = &args,
5497 .rpc_resp = &res,
5498 .rpc_cred = cred,
5499 };
99fe60d0 5500
f092075d 5501 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5502 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5503 sizeof(args.id));
6bbb4ae8
CL		 5504 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5505 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5506 args.id_len, args.id);
99fe60d0 5507
acdeb69d 5508 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5509 GFP_NOFS);
acdeb69d 5510 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5511 status = -ENOMEM;
5512 goto out;
5513 }
78fe0f41 5514
79d4e1f0 5515 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5516 GFP_NOFS);
177313f1 5517 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5518 status = -ENOMEM;
acdeb69d 5519 goto out_server_owner;
abe9a6d5 5520 }
78fe0f41 5521
bbafffd2 5522 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5523 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5524 status = -ENOMEM;
5525 goto out_server_scope;
5526 }
5527
1bd714f2 5528 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5529 if (status == 0)
32b01310 5530 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5531
acdeb69d 5532 if (status == 0) {
32b01310
TM		 5533 clp->cl_clientid = res.clientid;
5534 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5535 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5536 clp->cl_seqid = res.seqid;
5537
acdeb69d
CL		 5538 kfree(clp->cl_serverowner);
5539 clp->cl_serverowner = res.server_owner;
5540 res.server_owner = NULL;
78fe0f41 5541
7d2ed9ac 5542 /* use the most recent implementation id */
59155546
CL		 5543 kfree(clp->cl_implid);
5544 clp->cl_implid = res.impl_id;
7d2ed9ac 5545
177313f1 5546 if (clp->cl_serverscope != NULL &&
79d4e1f0 5547 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5548 res.server_scope)) {
5549 dprintk("%s: server_scope mismatch detected\n",
5550 __func__);
5551 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5552 kfree(clp->cl_serverscope);
5553 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5554 }
5555
177313f1 5556 if (clp->cl_serverscope == NULL) {
79d4e1f0 5557 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5558 goto out;
5559 }
32b01310
TM		 5560 } else
5561 kfree(res.impl_id);
7d2ed9ac 5562
acdeb69d
CL		 5563out_server_owner:
5564 kfree(res.server_owner);
7d2ed9ac 5565out_server_scope:
abe9a6d5
WAA		 5566 kfree(res.server_scope);
5567out:
177313f1 5568 if (clp->cl_implid != NULL)
6bbb4ae8 5569 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5570 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5571 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5572 clp->cl_implid->date.seconds,
5573 clp->cl_implid->date.nseconds);
6bbb4ae8 5574 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5575 return status;
5576}
5577
66245539
TM		 5578static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5579 struct rpc_cred *cred)
5580{
5581 struct rpc_message msg = {
5582 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5583 .rpc_argp = clp,
5584 .rpc_cred = cred,
5585 };
5586 int status;
5587
5588 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5589 if (status)
02c67525 5590 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5591 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5592 return status;
5593}
5594
5595static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5596 struct rpc_cred *cred)
5597{
5598 unsigned int loop;
5599 int ret;
5600
5601 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5602 ret = _nfs4_proc_destroy_clientid(clp, cred);
5603 switch (ret) {
5604 case -NFS4ERR_DELAY:
5605 case -NFS4ERR_CLIENTID_BUSY:
5606 ssleep(1);
5607 break;
5608 default:
5609 return ret;
5610 }
5611 }
5612 return 0;
5613}
5614
5615int nfs4_destroy_clientid(struct nfs_client *clp)
5616{
5617 struct rpc_cred *cred;
5618 int ret = 0;
5619
5620 if (clp->cl_mvops->minor_version < 1)
5621 goto out;
5622 if (clp->cl_exchange_flags == 0)
5623 goto out;
05f4c350
CL		 5624 if (clp->cl_preserve_clid)
5625 goto out;
66245539
TM		 5626 cred = nfs4_get_exchange_id_cred(clp);
5627 ret = nfs4_proc_destroy_clientid(clp, cred);
5628 if (cred)
5629 put_rpccred(cred);
5630 switch (ret) {
5631 case 0:
5632 case -NFS4ERR_STALE_CLIENTID:
5633 clp->cl_exchange_flags = 0;
5634 }
5635out:
5636 return ret;
5637}
5638
2050f0cc
AA		 5639struct nfs4_get_lease_time_data {
5640 struct nfs4_get_lease_time_args *args;
5641 struct nfs4_get_lease_time_res *res;
5642 struct nfs_client *clp;
5643};
5644
5645static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5646 void *calldata)
5647{
2050f0cc
AA		 5648 struct nfs4_get_lease_time_data *data =
5649 (struct nfs4_get_lease_time_data *)calldata;
5650
5651 dprintk("--> %s\n", __func__);
5652 /* just setup sequence, do not trigger session recovery
5653 since we're invoked within one */
d9afbd1b
TM		 5654 nfs41_setup_sequence(data->clp->cl_session,
5655 &data->args->la_seq_args,
5656 &data->res->lr_seq_res,
5657 task);
2050f0cc
AA		 5658 dprintk("<-- %s\n", __func__);
5659}
5660
5661/*
5662 * Called from nfs4_state_manager thread for session setup, so don't recover
5663 * from sequence operation or clientid errors.
5664 */
5665static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5666{
5667 struct nfs4_get_lease_time_data *data =
5668 (struct nfs4_get_lease_time_data *)calldata;
5669
5670 dprintk("--> %s\n", __func__);
14516c3a
TM		 5671 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5672 return;
2050f0cc
AA		 5673 switch (task->tk_status) {
5674 case -NFS4ERR_DELAY:
5675 case -NFS4ERR_GRACE:
5676 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5677 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5678 task->tk_status = 0;
a8a4ae3a
AA		 5679 /* fall through */
5680 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5681 rpc_restart_call_prepare(task);
2050f0cc
AA		 5682 return;
5683 }
2050f0cc
AA		 5684 dprintk("<-- %s\n", __func__);
5685}
5686
17280175 5687static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5688 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5689 .rpc_call_done = nfs4_get_lease_time_done,
5690};
5691
5692int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5693{
5694 struct rpc_task *task;
5695 struct nfs4_get_lease_time_args args;
5696 struct nfs4_get_lease_time_res res = {
5697 .lr_fsinfo = fsinfo,
5698 };
5699 struct nfs4_get_lease_time_data data = {
5700 .args = &args,
5701 .res = &res,
5702 .clp = clp,
5703 };
5704 struct rpc_message msg = {
5705 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5706 .rpc_argp = &args,
5707 .rpc_resp = &res,
5708 };
5709 struct rpc_task_setup task_setup = {
5710 .rpc_client = clp->cl_rpcclient,
5711 .rpc_message = &msg,
5712 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5713 .callback_data = &data,
5714 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5715 };
5716 int status;
5717
9d12b216 5718 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5719 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5720 dprintk("--> %s\n", __func__);
5721 task = rpc_run_task(&task_setup);
5722
5723 if (IS_ERR(task))
5724 status = PTR_ERR(task);
5725 else {
5726 status = task->tk_status;
5727 rpc_put_task(task);
5728 }
5729 dprintk("<-- %s return %d\n", __func__, status);
5730
5731 return status;
5732}
5733
fc931582
AA		 5734/*
5735 * Initialize the values to be used by the client in CREATE_SESSION
5736 * If nfs4_init_session set the fore channel request and response sizes,
5737 * use them.
5738 *
5739 * Set the back channel max_resp_sz_cached to zero to force the client to
5740 * always set csa_cachethis to FALSE because the current implementation
5741 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5742 */
5743static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5744{
5745 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5746 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5747 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5748
5749 if (mxrqst_sz == 0)
5750 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5751 if (mxresp_sz == 0)
5752 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5753 /* Fore channel attributes */
fc931582
AA		 5754 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5755 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5756 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5757 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5758
5759 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5760 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5761 __func__,
5762 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5763 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5764
5765 /* Back channel attributes */
fc931582
AA		 5766 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5767 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5768 args->bc_attrs.max_resp_sz_cached = 0;
5769 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5770 args->bc_attrs.max_reqs = 1;
5771
5772 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5773 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5774 __func__,
5775 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5776 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5777 args->bc_attrs.max_reqs);
5778}
5779
43c2e885 5780static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5781{
43c2e885
BF		 5782 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5783 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5784
43c2e885
BF		 5785 if (rcvd->max_resp_sz > sent->max_resp_sz)
5786 return -EINVAL;
5787 /*
5788 * Our requested max_ops is the minimum we need; we're not
5789 * prepared to break up compounds into smaller pieces than that.
5790 * So, no point even trying to continue if the server won't
5791 * cooperate:
5792 */
5793 if (rcvd->max_ops < sent->max_ops)
5794 return -EINVAL;
5795 if (rcvd->max_reqs == 0)
5796 return -EINVAL;
b4b9a0c1
VG		 5797 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5798 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5799 return 0;
8d35301d
AA		 5800}
5801
43c2e885
BF		 5802static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5803{
5804 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5805 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5806
43c2e885
BF		 5807 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5808 return -EINVAL;
5809 if (rcvd->max_resp_sz < sent->max_resp_sz)
5810 return -EINVAL;
5811 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5812 return -EINVAL;
5813 /* These would render the backchannel useless: */
b4b9a0c1 5814 if (rcvd->max_ops != sent->max_ops)
43c2e885 5815 return -EINVAL;
b4b9a0c1 5816 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5817 return -EINVAL;
5818 return 0;
5819}
8d35301d 5820
8d35301d
AA		 5821static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5822 struct nfs4_session *session)
5823{
43c2e885 5824 int ret;
8d35301d 5825
43c2e885
BF		 5826 ret = nfs4_verify_fore_channel_attrs(args, session);
5827 if (ret)
5828 return ret;
5829 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5830}
5831
848f5bda
TM		 5832static int _nfs4_proc_create_session(struct nfs_client *clp,
5833 struct rpc_cred *cred)
fc931582
AA		 5834{
5835 struct nfs4_session *session = clp->cl_session;
5836 struct nfs41_create_session_args args = {
5837 .client = clp,
5838 .cb_program = NFS4_CALLBACK,
5839 };
5840 struct nfs41_create_session_res res = {
5841 .client = clp,
5842 };
5843 struct rpc_message msg = {
5844 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5845 .rpc_argp = &args,
5846 .rpc_resp = &res,
848f5bda 5847 .rpc_cred = cred,
fc931582
AA		 5848 };
5849 int status;
5850
5851 nfs4_init_channel_attrs(&args);
0f91421e 5852 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5853
1bd714f2 5854 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5855
43095d39 5856 if (!status) {
8d35301d
AA		 5857 /* Verify the session's negotiated channel_attrs values */
5858 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5859 /* Increment the clientid slot sequence id */
5860 clp->cl_seqid++;
5861 }
5862
5863 return status;
5864}
5865
5866/*
5867 * Issues a CREATE_SESSION operation to the server.
5868 * It is the responsibility of the caller to verify the session is
5869 * expired before calling this routine.
5870 */
848f5bda 5871int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5872{
5873 int status;
5874 unsigned *ptr;
fc931582
AA		 5875 struct nfs4_session *session = clp->cl_session;
5876
5877 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5878
848f5bda 5879 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5880 if (status)
5881 goto out;
5882
aacd5537
AA		 5883 /* Init or reset the session slot tables */
5884 status = nfs4_setup_session_slot_tables(session);
5885 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5886 if (status)
5887 goto out;
5888
5889 ptr = (unsigned *)&session->sess_id.data[0];
5890 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5891 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5892out:
5893 dprintk("<-- %s\n", __func__);
5894 return status;
5895}
5896
0f3e66c6
AA		 5897/*
5898 * Issue the over-the-wire RPC DESTROY_SESSION.
5899 * The caller must serialize access to this routine.
5900 */
848f5bda
TM		 5901int nfs4_proc_destroy_session(struct nfs4_session *session,
5902 struct rpc_cred *cred)
0f3e66c6 5903{
848f5bda
TM		 5904 struct rpc_message msg = {
5905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5906 .rpc_argp = session,
5907 .rpc_cred = cred,
5908 };
0f3e66c6 5909 int status = 0;
0f3e66c6
AA		 5910
5911 dprintk("--> nfs4_proc_destroy_session\n");
5912
5913 /* session is still being setup */
5914 if (session->clp->cl_cons_state != NFS_CS_READY)
5915 return status;
5916
1bd714f2 5917 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5918
5919 if (status)
08106ac7 5920 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5921 "Session has been destroyed regardless...\n", status);
5922
5923 dprintk("<-- nfs4_proc_destroy_session\n");
5924 return status;
5925}
5926
fc01cea9
AA		 5927/*
5928 * Renew the cl_session lease.
5929 */
d5f8d3fe
TM		 5930struct nfs4_sequence_data {
5931 struct nfs_client *clp;
5932 struct nfs4_sequence_args args;
5933 struct nfs4_sequence_res res;
5934};
5935
dc96aef9
AB		 5936static void nfs41_sequence_release(void *data)
5937{
d5f8d3fe
TM		 5938 struct nfs4_sequence_data *calldata = data;
5939 struct nfs_client *clp = calldata->clp;
dc96aef9 5940
7135840f
AB		 5941 if (atomic_read(&clp->cl_count) > 1)
5942 nfs4_schedule_state_renewal(clp);
5943 nfs_put_client(clp);
d5f8d3fe 5944 kfree(calldata);
dc96aef9
AB		 5945}
5946
aa5190d0
TM		 5947static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5948{
5949 switch(task->tk_status) {
5950 case -NFS4ERR_DELAY:
aa5190d0
TM		 5951 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5952 return -EAGAIN;
5953 default:
0400a6b0 5954 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5955 }
5956 return 0;
5957}
5958
dc96aef9 5959static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5960{
d5f8d3fe
TM		 5961 struct nfs4_sequence_data *calldata = data;
5962 struct nfs_client *clp = calldata->clp;
fc01cea9 5963
14516c3a
TM		 5964 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5965 return;
fc01cea9
AA		 5966
5967 if (task->tk_status < 0) {
5968 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5969 if (atomic_read(&clp->cl_count) == 1)
5970 goto out;
fc01cea9 5971
aa5190d0
TM		 5972 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5973 rpc_restart_call_prepare(task);
fc01cea9
AA		 5974 return;
5975 }
5976 }
fc01cea9 5977 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5978out:
fc01cea9
AA		 5979 dprintk("<-- %s\n", __func__);
5980}
5981
5982static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5983{
d5f8d3fe
TM		 5984 struct nfs4_sequence_data *calldata = data;
5985 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5986 struct nfs4_sequence_args *args;
5987 struct nfs4_sequence_res *res;
5988
fc01cea9
AA		 5989 args = task->tk_msg.rpc_argp;
5990 res = task->tk_msg.rpc_resp;
5991
d9afbd1b 5992 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5993}
5994
5995static const struct rpc_call_ops nfs41_sequence_ops = {
5996 .rpc_call_done = nfs41_sequence_call_done,
5997 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5998 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5999};
6000
8fe72bac
TM		 6001static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6002 struct rpc_cred *cred,
6003 bool is_privileged)
fc01cea9 6004{
d5f8d3fe 6005 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6006 struct rpc_message msg = {
6007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6008 .rpc_cred = cred,
6009 };
71ac6da9
TM		 6010 struct rpc_task_setup task_setup_data = {
6011 .rpc_client = clp->cl_rpcclient,
6012 .rpc_message = &msg,
8fe72bac 6013 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 6014 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6015 };
fc01cea9 6016
7135840f 6017 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6018 return ERR_PTR(-EIO);
dfb4f309 6019 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6020 if (calldata == NULL) {
7135840f 6021 nfs_put_client(clp);
71ac6da9 6022 return ERR_PTR(-ENOMEM);
fc01cea9 6023 }
9d12b216 6024 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6025 if (is_privileged)
6026 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6027 msg.rpc_argp = &calldata->args;
6028 msg.rpc_resp = &calldata->res;
6029 calldata->clp = clp;
71ac6da9 6030 task_setup_data.callback_data = calldata;
fc01cea9 6031
71ac6da9
TM		 6032 return rpc_run_task(&task_setup_data);
6033}
6034
2f60ea6b 6035static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6036{
6037 struct rpc_task *task;
6038 int ret = 0;
6039
2f60ea6b
TM		 6040 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6041 return 0;
8fe72bac 6042 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6043 if (IS_ERR(task))
6044 ret = PTR_ERR(task);
6045 else
bf294b41 6046 rpc_put_task_async(task);
71ac6da9
TM		 6047 dprintk("<-- %s status=%d\n", __func__, ret);
6048 return ret;
6049}
6050
6051static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6052{
6053 struct rpc_task *task;
6054 int ret;
6055
8fe72bac 6056 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6057 if (IS_ERR(task)) {
6058 ret = PTR_ERR(task);
6059 goto out;
6060 }
6061 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6062 if (!ret) {
6063 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6064
6065 if (task->tk_status == 0)
6066 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6067 ret = task->tk_status;
b4410c2f 6068 }
71ac6da9
TM		 6069 rpc_put_task(task);
6070out:
6071 dprintk("<-- %s status=%d\n", __func__, ret);
6072 return ret;
fc01cea9
AA		 6073}
6074
fce5c838
RL		 6075struct nfs4_reclaim_complete_data {
6076 struct nfs_client *clp;
6077 struct nfs41_reclaim_complete_args arg;
6078 struct nfs41_reclaim_complete_res res;
6079};
6080
6081static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6082{
6083 struct nfs4_reclaim_complete_data *calldata = data;
6084
d9afbd1b
TM		 6085 nfs41_setup_sequence(calldata->clp->cl_session,
6086 &calldata->arg.seq_args,
6087 &calldata->res.seq_res,
6088 task);
fce5c838
RL		 6089}
6090
aa5190d0
TM		 6091static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6092{
6093 switch(task->tk_status) {
6094 case 0:
6095 case -NFS4ERR_COMPLETE_ALREADY:
6096 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6097 break;
6098 case -NFS4ERR_DELAY:
aa5190d0 6099 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6100 /* fall through */
6101 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6102 return -EAGAIN;
6103 default:
0400a6b0 6104 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6105 }
6106 return 0;
6107}
6108
fce5c838
RL		 6109static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6110{
6111 struct nfs4_reclaim_complete_data *calldata = data;
6112 struct nfs_client *clp = calldata->clp;
6113 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6114
6115 dprintk("--> %s\n", __func__);
14516c3a
TM		 6116 if (!nfs41_sequence_done(task, res))
6117 return;
fce5c838 6118
aa5190d0
TM		 6119 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6120 rpc_restart_call_prepare(task);
6121 return;
6122 }
fce5c838
RL		 6123 dprintk("<-- %s\n", __func__);
6124}
6125
6126static void nfs4_free_reclaim_complete_data(void *data)
6127{
6128 struct nfs4_reclaim_complete_data *calldata = data;
6129
6130 kfree(calldata);
6131}
6132
6133static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6134 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6135 .rpc_call_done = nfs4_reclaim_complete_done,
6136 .rpc_release = nfs4_free_reclaim_complete_data,
6137};
6138
6139/*
6140 * Issue a global reclaim complete.
6141 */
6142static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6143{
6144 struct nfs4_reclaim_complete_data *calldata;
6145 struct rpc_task *task;
6146 struct rpc_message msg = {
6147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6148 };
6149 struct rpc_task_setup task_setup_data = {
6150 .rpc_client = clp->cl_rpcclient,
6151 .rpc_message = &msg,
6152 .callback_ops = &nfs4_reclaim_complete_call_ops,
6153 .flags = RPC_TASK_ASYNC,
6154 };
6155 int status = -ENOMEM;
6156
6157 dprintk("--> %s\n", __func__);
8535b2be 6158 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6159 if (calldata == NULL)
6160 goto out;
6161 calldata->clp = clp;
6162 calldata->arg.one_fs = 0;
fce5c838 6163
9d12b216 6164 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6165 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6166 msg.rpc_argp = &calldata->arg;
6167 msg.rpc_resp = &calldata->res;
6168 task_setup_data.callback_data = calldata;
6169 task = rpc_run_task(&task_setup_data);
acf82b85 6170 if (IS_ERR(task)) {
fce5c838 6171 status = PTR_ERR(task);
acf82b85
DC		 6172 goto out;
6173 }
c34c32ea
AA		 6174 status = nfs4_wait_for_completion_rpc_task(task);
6175 if (status == 0)
6176 status = task->tk_status;
fce5c838 6177 rpc_put_task(task);
acf82b85 6178 return 0;
fce5c838
RL		 6179out:
6180 dprintk("<-- %s status=%d\n", __func__, status);
6181 return status;
6182}
b1f69b75
AA		 6183
6184static void
6185nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6186{
6187 struct nfs4_layoutget *lgp = calldata;
c31663d4 6188 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6189 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6190
6191 dprintk("--> %s\n", __func__);
c31663d4
FI		 6192 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6193 * right now covering the LAYOUTGET we are about to send.
6194 * However, that is not so catastrophic, and there seems
6195 * to be no way to prevent it completely.
6196 */
6ba7db34 6197 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6198 &lgp->res.seq_res, task))
b1f69b75 6199 return;
cf7d63f1
FI		 6200 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6201 NFS_I(lgp->args.inode)->layout,
6202 lgp->args.ctx->state)) {
6203 rpc_exit(task, NFS4_OK);
cf7d63f1 6204 }
b1f69b75
AA		 6205}
6206
6207static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6208{
6209 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6210 struct inode *inode = lgp->args.inode;
6211 struct nfs_server *server = NFS_SERVER(inode);
6212 struct pnfs_layout_hdr *lo;
6213 struct nfs4_state *state = NULL;
30005121 6214 unsigned long timeo, giveup;
b1f69b75
AA		 6215
6216 dprintk("--> %s\n", __func__);
6217
6ba7db34 6218 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6219 goto out;
b1f69b75
AA		 6220
6221 switch (task->tk_status) {
6222 case 0:
ee314c2a 6223 goto out;
b1f69b75
AA		 6224 case -NFS4ERR_LAYOUTTRYLATER:
6225 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6226 timeo = rpc_get_timeout(task->tk_client);
6227 giveup = lgp->args.timestamp + timeo;
6228 if (time_after(giveup, jiffies))
6229 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6230 break;
6231 case -NFS4ERR_EXPIRED:
6232 case -NFS4ERR_BAD_STATEID:
6233 spin_lock(&inode->i_lock);
6234 lo = NFS_I(inode)->layout;
6235 if (!lo || list_empty(&lo->plh_segs)) {
6236 spin_unlock(&inode->i_lock);
6237 /* If the open stateid was bad, then recover it. */
6238 state = lgp->args.ctx->state;
6239 } else {
6240 LIST_HEAD(head);
6241
6242 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6243 spin_unlock(&inode->i_lock);
6244 /* Mark the bad layout state as invalid, then
6245 * retry using the open stateid. */
6246 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6247 }
6248 }
ee314c2a
TM		 6249 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6250 rpc_restart_call_prepare(task);
6251out:
b1f69b75
AA		 6252 dprintk("<-- %s\n", __func__);
6253}
6254
8554116e
IK		 6255static size_t max_response_pages(struct nfs_server *server)
6256{
6257 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6258 return nfs_page_array_len(0, max_resp_sz);
6259}
6260
6261static void nfs4_free_pages(struct page **pages, size_t size)
6262{
6263 int i;
6264
6265 if (!pages)
6266 return;
6267
6268 for (i = 0; i < size; i++) {
6269 if (!pages[i])
6270 break;
6271 __free_page(pages[i]);
6272 }
6273 kfree(pages);
6274}
6275
6276static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6277{
6278 struct page **pages;
6279 int i;
6280
6281 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6282 if (!pages) {
6283 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6284 return NULL;
6285 }
6286
6287 for (i = 0; i < size; i++) {
6288 pages[i] = alloc_page(gfp_flags);
6289 if (!pages[i]) {
6290 dprintk("%s: failed to allocate page\n", __func__);
6291 nfs4_free_pages(pages, size);
6292 return NULL;
6293 }
6294 }
6295
6296 return pages;
6297}
6298
b1f69b75
AA		 6299static void nfs4_layoutget_release(void *calldata)
6300{
6301 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6302 struct inode *inode = lgp->args.inode;
6303 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6304 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6305
6306 dprintk("--> %s\n", __func__);
8554116e 6307 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6308 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6309 put_nfs_open_context(lgp->args.ctx);
6310 kfree(calldata);
6311 dprintk("<-- %s\n", __func__);
6312}
6313
6314static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6315 .rpc_call_prepare = nfs4_layoutget_prepare,
6316 .rpc_call_done = nfs4_layoutget_done,
6317 .rpc_release = nfs4_layoutget_release,
6318};
6319
a0b0a6e3
TM		 6320struct pnfs_layout_segment *
6321nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6322{
a47970ff
WAA		 6323 struct inode *inode = lgp->args.inode;
6324 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6325 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6326 struct rpc_task *task;
6327 struct rpc_message msg = {
6328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6329 .rpc_argp = &lgp->args,
6330 .rpc_resp = &lgp->res,
6331 };
6332 struct rpc_task_setup task_setup_data = {
6333 .rpc_client = server->client,
6334 .rpc_message = &msg,
6335 .callback_ops = &nfs4_layoutget_call_ops,
6336 .callback_data = lgp,
6337 .flags = RPC_TASK_ASYNC,
6338 };
a0b0a6e3 6339 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6340 int status = 0;
6341
6342 dprintk("--> %s\n", __func__);
6343
8554116e
IK		 6344 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6345 if (!lgp->args.layout.pages) {
6346 nfs4_layoutget_release(lgp);
a0b0a6e3 6347 return ERR_PTR(-ENOMEM);
8554116e
IK		 6348 }
6349 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6350 lgp->args.timestamp = jiffies;
8554116e 6351
35124a09 6352 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6353 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6354 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6355
6356 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6357 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6358
b1f69b75
AA		 6359 task = rpc_run_task(&task_setup_data);
6360 if (IS_ERR(task))
a0b0a6e3 6361 return ERR_CAST(task);
b1f69b75 6362 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6363 if (status == 0)
6364 status = task->tk_status;
085b7a45
WAA		 6365 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6366 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6367 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6368 rpc_put_task(task);
6369 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6370 if (status)
6371 return ERR_PTR(status);
6372 return lseg;
b1f69b75
AA		 6373}
6374
cbe82603
BH		 6375static void
6376nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6377{
6378 struct nfs4_layoutreturn *lrp = calldata;
6379
6380 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6381 nfs41_setup_sequence(lrp->clp->cl_session,
6382 &lrp->args.seq_args,
6383 &lrp->res.seq_res,
6384 task);
cbe82603
BH		 6385}
6386
6387static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6388{
6389 struct nfs4_layoutreturn *lrp = calldata;
6390 struct nfs_server *server;
6391
6392 dprintk("--> %s\n", __func__);
6393
6ba7db34 6394 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6395 return;
6396
6397 server = NFS_SERVER(lrp->args.inode);
6398 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6399 rpc_restart_call_prepare(task);
cbe82603
BH		 6400 return;
6401 }
cbe82603
BH		 6402 dprintk("<-- %s\n", __func__);
6403}
6404
6405static void nfs4_layoutreturn_release(void *calldata)
6406{
6407 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6408 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6409
6410 dprintk("--> %s\n", __func__);
849b286f
TM		 6411 spin_lock(&lo->plh_inode->i_lock);
6412 if (lrp->res.lrs_present)
6413 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6414 lo->plh_block_lgets--;
6415 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6416 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6417 kfree(calldata);
6418 dprintk("<-- %s\n", __func__);
6419}
6420
6421static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6422 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6423 .rpc_call_done = nfs4_layoutreturn_done,
6424 .rpc_release = nfs4_layoutreturn_release,
6425};
6426
6427int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6428{
6429 struct rpc_task *task;
6430 struct rpc_message msg = {
6431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6432 .rpc_argp = &lrp->args,
6433 .rpc_resp = &lrp->res,
6434 };
6435 struct rpc_task_setup task_setup_data = {
6436 .rpc_client = lrp->clp->cl_rpcclient,
6437 .rpc_message = &msg,
6438 .callback_ops = &nfs4_layoutreturn_call_ops,
6439 .callback_data = lrp,
6440 };
6441 int status;
6442
6443 dprintk("--> %s\n", __func__);
9d12b216 6444 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6445 task = rpc_run_task(&task_setup_data);
6446 if (IS_ERR(task))
6447 return PTR_ERR(task);
6448 status = task->tk_status;
6449 dprintk("<-- %s status=%d\n", __func__, status);
6450 rpc_put_task(task);
6451 return status;
6452}
6453
7f11d8d3
AA		 6454/*
6455 * Retrieve the list of Data Server devices from the MDS.
6456 */
6457static int _nfs4_getdevicelist(struct nfs_server *server,
6458 const struct nfs_fh *fh,
6459 struct pnfs_devicelist *devlist)
6460{
6461 struct nfs4_getdevicelist_args args = {
6462 .fh = fh,
6463 .layoutclass = server->pnfs_curr_ld->id,
6464 };
6465 struct nfs4_getdevicelist_res res = {
6466 .devlist = devlist,
6467 };
6468 struct rpc_message msg = {
6469 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6470 .rpc_argp = &args,
6471 .rpc_resp = &res,
6472 };
6473 int status;
6474
6475 dprintk("--> %s\n", __func__);
6476 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6477 &res.seq_res, 0);
6478 dprintk("<-- %s status=%d\n", __func__, status);
6479 return status;
6480}
6481
6482int nfs4_proc_getdevicelist(struct nfs_server *server,
6483 const struct nfs_fh *fh,
6484 struct pnfs_devicelist *devlist)
6485{
6486 struct nfs4_exception exception = { };
6487 int err;
6488
6489 do {
6490 err = nfs4_handle_exception(server,
6491 _nfs4_getdevicelist(server, fh, devlist),
6492 &exception);
6493 } while (exception.retry);
6494
6495 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6496 err, devlist->num_devs);
6497
6498 return err;
6499}
6500EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6501
b1f69b75
AA		 6502static int
6503_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6504{
6505 struct nfs4_getdeviceinfo_args args = {
6506 .pdev = pdev,
6507 };
6508 struct nfs4_getdeviceinfo_res res = {
6509 .pdev = pdev,
6510 };
6511 struct rpc_message msg = {
6512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6513 .rpc_argp = &args,
6514 .rpc_resp = &res,
6515 };
6516 int status;
6517
6518 dprintk("--> %s\n", __func__);
7c513058 6519 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6520 dprintk("<-- %s status=%d\n", __func__, status);
6521
6522 return status;
6523}
6524
6525int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6526{
6527 struct nfs4_exception exception = { };
6528 int err;
6529
6530 do {
6531 err = nfs4_handle_exception(server,
6532 _nfs4_proc_getdeviceinfo(server, pdev),
6533 &exception);
6534 } while (exception.retry);
6535 return err;
6536}
6537EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6538
863a3c6c
AA		 6539static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6540{
6541 struct nfs4_layoutcommit_data *data = calldata;
6542 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6543 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6544
d9afbd1b
TM		 6545 nfs41_setup_sequence(session,
6546 &data->args.seq_args,
6547 &data->res.seq_res,
6548 task);
863a3c6c
AA		 6549}
6550
6551static void
6552nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6553{
6554 struct nfs4_layoutcommit_data *data = calldata;
6555 struct nfs_server *server = NFS_SERVER(data->args.inode);
6556
6ba7db34 6557 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6558 return;
6559
6560 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6561 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6562 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6563 case -NFS4ERR_BADLAYOUT: /* no layout */
6564 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6565 task->tk_status = 0;
e59d27e0
TM		 6566 break;
6567 case 0:
863a3c6c
AA		 6568 nfs_post_op_update_inode_force_wcc(data->args.inode,
6569 data->res.fattr);
e59d27e0
TM		 6570 break;
6571 default:
6572 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6573 rpc_restart_call_prepare(task);
6574 return;
6575 }
6576 }
863a3c6c
AA		 6577}
6578
6579static void nfs4_layoutcommit_release(void *calldata)
6580{
6581 struct nfs4_layoutcommit_data *data = calldata;
6582
db29c089 6583 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6584 put_rpccred(data->cred);
6585 kfree(data);
6586}
6587
6588static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6589 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6590 .rpc_call_done = nfs4_layoutcommit_done,
6591 .rpc_release = nfs4_layoutcommit_release,
6592};
6593
6594int
ef311537 6595nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6596{
6597 struct rpc_message msg = {
6598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6599 .rpc_argp = &data->args,
6600 .rpc_resp = &data->res,
6601 .rpc_cred = data->cred,
6602 };
6603 struct rpc_task_setup task_setup_data = {
6604 .task = &data->task,
6605 .rpc_client = NFS_CLIENT(data->args.inode),
6606 .rpc_message = &msg,
6607 .callback_ops = &nfs4_layoutcommit_ops,
6608 .callback_data = data,
6609 .flags = RPC_TASK_ASYNC,
6610 };
6611 struct rpc_task *task;
6612 int status = 0;
6613
6614 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6615 "lbw: %llu inode %lu\n",
6616 data->task.tk_pid, sync,
6617 data->args.lastbytewritten,
6618 data->args.inode->i_ino);
6619
9d12b216 6620 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6621 task = rpc_run_task(&task_setup_data);
6622 if (IS_ERR(task))
6623 return PTR_ERR(task);
ef311537 6624 if (sync == false)
863a3c6c
AA		 6625 goto out;
6626 status = nfs4_wait_for_completion_rpc_task(task);
6627 if (status != 0)
6628 goto out;
6629 status = task->tk_status;
6630out:
6631 dprintk("%s: status %d\n", __func__, status);
6632 rpc_put_task(task);
6633 return status;
6634}
fca78d6d
BS		 6635
6636static int
6637_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6638 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6639{
6640 struct nfs41_secinfo_no_name_args args = {
6641 .style = SECINFO_STYLE_CURRENT_FH,
6642 };
6643 struct nfs4_secinfo_res res = {
6644 .flavors = flavors,
6645 };
6646 struct rpc_message msg = {
6647 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6648 .rpc_argp = &args,
6649 .rpc_resp = &res,
6650 };
6651 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6652}
6653
6654static int
6655nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6656 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6657{
6658 struct nfs4_exception exception = { };
6659 int err;
6660 do {
6661 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6662 switch (err) {
6663 case 0:
6664 case -NFS4ERR_WRONGSEC:
6665 case -NFS4ERR_NOTSUPP:
05e9cfb4 6666 goto out;
fca78d6d
BS		 6667 default:
6668 err = nfs4_handle_exception(server, err, &exception);
6669 }
6670 } while (exception.retry);
05e9cfb4 6671out:
fca78d6d
BS		 6672 return err;
6673}
6674
6675static int
6676nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6677 struct nfs_fsinfo *info)
6678{
6679 int err;
6680 struct page *page;
6681 rpc_authflavor_t flavor;
6682 struct nfs4_secinfo_flavors *flavors;
6683
6684 page = alloc_page(GFP_KERNEL);
6685 if (!page) {
6686 err = -ENOMEM;
6687 goto out;
6688 }
6689
6690 flavors = page_address(page);
6691 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6692
6693 /*
6694 * Fall back on "guess and check" method if
6695 * the server doesn't support SECINFO_NO_NAME
6696 */
6697 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6698 err = nfs4_find_root_sec(server, fhandle, info);
6699 goto out_freepage;
6700 }
6701 if (err)
6702 goto out_freepage;
6703
6704 flavor = nfs_find_best_sec(flavors);
6705 if (err == 0)
6706 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6707
6708out_freepage:
6709 put_page(page);
6710 if (err == -EACCES)
6711 return -EPERM;
6712out:
6713 return err;
6714}
1cab0652
BS		 6715
6716static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6717{
6718 int status;
6719 struct nfs41_test_stateid_args args = {
1cab0652 6720 .stateid = stateid,
7d974794
BS		 6721 };
6722 struct nfs41_test_stateid_res res;
6723 struct rpc_message msg = {
6724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6725 .rpc_argp = &args,
6726 .rpc_resp = &res,
6727 };
1cab0652 6728
38527b15 6729 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6730 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6731 nfs4_set_sequence_privileged(&args.seq_args);
6732 status = nfs4_call_sync_sequence(server->client, server, &msg,
6733 &args.seq_args, &res.seq_res);
38527b15
CL		 6734 if (status != NFS_OK) {
6735 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6736 return status;
38527b15
CL		 6737 }
6738 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6739 return -res.status;
7d974794
BS		 6740}
6741
38527b15
CL		 6742/**
6743 * nfs41_test_stateid - perform a TEST_STATEID operation
6744 *
6745 * @server: server / transport on which to perform the operation
6746 * @stateid: state ID to test
6747 *
6748 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6749 * Otherwise a negative NFS4ERR value is returned if the operation
6750 * failed or the state ID is not currently valid.
6751 */
1cab0652 6752static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6753{
6754 struct nfs4_exception exception = { };
6755 int err;
6756 do {
377e507d
CL		 6757 err = _nfs41_test_stateid(server, stateid);
6758 if (err != -NFS4ERR_DELAY)
6759 break;
6760 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6761 } while (exception.retry);
6762 return err;
6763}
9aeda35f 6764
1cab0652 6765static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6766{
9aeda35f 6767 struct nfs41_free_stateid_args args = {
1cab0652 6768 .stateid = stateid,
9aeda35f
BS		 6769 };
6770 struct nfs41_free_stateid_res res;
6771 struct rpc_message msg = {
6772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6773 .rpc_argp = &args,
6774 .rpc_resp = &res,
6775 };
38527b15 6776 int status;
9aeda35f 6777
38527b15 6778 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6779 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6780 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6781 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6782 &args.seq_args, &res.seq_res);
38527b15
CL		 6783 dprintk("NFS reply free_stateid: %d\n", status);
6784 return status;
9aeda35f
BS		 6785}
6786
38527b15
CL		 6787/**
6788 * nfs41_free_stateid - perform a FREE_STATEID operation
6789 *
6790 * @server: server / transport on which to perform the operation
6791 * @stateid: state ID to release
6792 *
6793 * Returns NFS_OK if the server freed "stateid". Otherwise a
6794 * negative NFS4ERR value is returned.
6795 */
1cab0652 6796static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6797{
6798 struct nfs4_exception exception = { };
6799 int err;
6800 do {
377e507d
CL		 6801 err = _nfs4_free_stateid(server, stateid);
6802 if (err != -NFS4ERR_DELAY)
6803 break;
6804 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6805 } while (exception.retry);
6806 return err;
6807}
36281caa
TM		 6808
6809static bool nfs41_match_stateid(const nfs4_stateid *s1,
6810 const nfs4_stateid *s2)
6811{
2d2f24ad 6812 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6813 return false;
6814
2d2f24ad 6815 if (s1->seqid == s2->seqid)
36281caa 6816 return true;
2d2f24ad 6817 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6818 return true;
6819
6820 return false;
6821}
6822
557134a3
AA		 6823#endif /* CONFIG_NFS_V4_1 */
6824
36281caa
TM		 6825static bool nfs4_match_stateid(const nfs4_stateid *s1,
6826 const nfs4_stateid *s2)
6827{
f597c537 6828 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6829}
6830
6831
17280175 6832static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6833 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6834 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6835 .recover_open = nfs4_open_reclaim,
6836 .recover_lock = nfs4_lock_reclaim,
591d71cb 6837 .establish_clid = nfs4_init_clientid,
90a16617 6838 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6839 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6840};
6841
591d71cb 6842#if defined(CONFIG_NFS_V4_1)
17280175 6843static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6844 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6845 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6846 .recover_open = nfs4_open_reclaim,
6847 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6848 .establish_clid = nfs41_init_clientid,
b4b82607 6849 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6850 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6851 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6852};
6853#endif /* CONFIG_NFS_V4_1 */
6854
17280175 6855static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6856 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6857 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6858 .recover_open = nfs4_open_expired,
6859 .recover_lock = nfs4_lock_expired,
6860 .establish_clid = nfs4_init_clientid,
90a16617 6861 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6862};
6863
6864#if defined(CONFIG_NFS_V4_1)
17280175 6865static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6866 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6867 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6868 .recover_open = nfs41_open_expired,
6869 .recover_lock = nfs41_lock_expired,
4d643d1d 6870 .establish_clid = nfs41_init_clientid,
b4b82607 6871 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6872};
591d71cb 6873#endif /* CONFIG_NFS_V4_1 */
1da177e4 6874
17280175 6875static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6876 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6877 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6878 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6879};
6880
6881#if defined(CONFIG_NFS_V4_1)
17280175 6882static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6883 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6884 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6885 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6886};
6887#endif
6888
97dc1359
TM		 6889static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6890 .minor_version = 0,
39c6daae
TM		 6891 .init_caps = NFS_CAP_READDIRPLUS
6892 | NFS_CAP_ATOMIC_OPEN
6893 | NFS_CAP_CHANGE_ATTR
6894 | NFS_CAP_POSIX_LOCK,
97dc1359 6895 .call_sync = _nfs4_call_sync,
36281caa 6896 .match_stateid = nfs4_match_stateid,
fca78d6d 6897 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6898 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6899 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6900 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6901};
6902
6903#if defined(CONFIG_NFS_V4_1)
6904static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6905 .minor_version = 1,
39c6daae
TM		 6906 .init_caps = NFS_CAP_READDIRPLUS
6907 | NFS_CAP_ATOMIC_OPEN
6908 | NFS_CAP_CHANGE_ATTR
3b66486c 6909 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 6910 | NFS_CAP_STATEID_NFSV41
6911 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 6912 .call_sync = nfs4_call_sync_sequence,
36281caa 6913 .match_stateid = nfs41_match_stateid,
fca78d6d 6914 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6915 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6916 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6917 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6918};
6919#endif
6920
97dc1359
TM		 6921const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6922 [0] = &nfs_v4_0_minor_ops,
6923#if defined(CONFIG_NFS_V4_1)
6924 [1] = &nfs_v4_1_minor_ops,
6925#endif
6926};
6927
73a79706
BS		 6928const struct inode_operations nfs4_dir_inode_operations = {
6929 .create = nfs_create,
6930 .lookup = nfs_lookup,
6931 .atomic_open = nfs_atomic_open,
6932 .link = nfs_link,
6933 .unlink = nfs_unlink,
6934 .symlink = nfs_symlink,
6935 .mkdir = nfs_mkdir,
6936 .rmdir = nfs_rmdir,
6937 .mknod = nfs_mknod,
6938 .rename = nfs_rename,
6939 .permission = nfs_permission,
6940 .getattr = nfs_getattr,
6941 .setattr = nfs_setattr,
6942 .getxattr = generic_getxattr,
6943 .setxattr = generic_setxattr,
6944 .listxattr = generic_listxattr,
6945 .removexattr = generic_removexattr,
6946};
6947
92e1d5be 6948static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6949 .permission = nfs_permission,
6950 .getattr = nfs_getattr,
6951 .setattr = nfs_setattr,
64c2ce8b
AK		 6952 .getxattr = generic_getxattr,
6953 .setxattr = generic_setxattr,
6954 .listxattr = generic_listxattr,
6955 .removexattr = generic_removexattr,
6b3b5496
BF		 6956};
6957
509de811 6958const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6959 .version = 4, /* protocol version */
6960 .dentry_ops = &nfs4_dentry_operations,
6961 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6962 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6963 .file_ops = &nfs4_file_operations,
1da177e4 6964 .getroot = nfs4_proc_get_root,
281cad46 6965 .submount = nfs4_submount,
ff9099f2 6966 .try_mount = nfs4_try_mount,
1da177e4
LT		 6967 .getattr = nfs4_proc_getattr,
6968 .setattr = nfs4_proc_setattr,
6969 .lookup = nfs4_proc_lookup,
6970 .access = nfs4_proc_access,
6971 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6972 .create = nfs4_proc_create,
6973 .remove = nfs4_proc_remove,
6974 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6975 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6976 .unlink_done = nfs4_proc_unlink_done,
6977 .rename = nfs4_proc_rename,
d3d4152a 6978 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6979 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6980 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6981 .link = nfs4_proc_link,
6982 .symlink = nfs4_proc_symlink,
6983 .mkdir = nfs4_proc_mkdir,
6984 .rmdir = nfs4_proc_remove,
6985 .readdir = nfs4_proc_readdir,
6986 .mknod = nfs4_proc_mknod,
6987 .statfs = nfs4_proc_statfs,
6988 .fsinfo = nfs4_proc_fsinfo,
6989 .pathconf = nfs4_proc_pathconf,
e9326dca 6990 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6991 .decode_dirent = nfs4_decode_dirent,
6992 .read_setup = nfs4_proc_read_setup,
1abb5088 6993 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6994 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6995 .read_done = nfs4_read_done,
1da177e4 6996 .write_setup = nfs4_proc_write_setup,
57208fa7 6997 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6998 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6999 .write_done = nfs4_write_done,
1da177e4 7000 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7001 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7002 .commit_done = nfs4_commit_done,
1da177e4 7003 .lock = nfs4_proc_lock,
e50a1c2e 7004 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7005 .close_context = nfs4_close_context,
2b484297 7006 .open_context = nfs4_atomic_open,
011e2a7f 7007 .have_delegation = nfs4_have_delegation,
57ec14c5 7008 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7009 .alloc_client = nfs4_alloc_client,
45a52a02 7010 .init_client = nfs4_init_client,
cdb7eced 7011 .free_client = nfs4_free_client,
1179acc6
BS		 7012 .create_server = nfs4_create_server,
7013 .clone_server = nfs_clone_server,
1da177e4
LT		 7014};
7015
64c2ce8b
AK		 7016static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7017 .prefix = XATTR_NAME_NFSV4_ACL,
7018 .list = nfs4_xattr_list_nfs4_acl,
7019 .get = nfs4_xattr_get_nfs4_acl,
7020 .set = nfs4_xattr_set_nfs4_acl,
7021};
7022
7023const struct xattr_handler *nfs4_xattr_handlers[] = {
7024 &nfs4_xattr_nfs4_acl_handler,
7025 NULL
7026};
7027
1da177e4
LT		 7028/*
7029 * Local variables:
7030 * c-basic-offset: 8
7031 * End:
7032 */
Linux 6.x block layer and io_uring tree(s)