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NFSv4: Handle NFS4ERR_DELAY and NFS4ERR_GRACE in nfs4_open_delegation_recall
[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;
8b6cc4d6
TM		 1435 case -NFS4ERR_DELAY:
1436 case -NFS4ERR_GRACE:
1437 set_bit(NFS_DELEGATED_STATE, &state->flags);
1438 ssleep(1);
1439 err = -EAGAIN;
1440 goto out;
1da177e4 1441 }
37380e42 1442 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1443 err = nfs4_handle_exception(server, err, &exception);
1444 } while (exception.retry);
965b5d67 1445out:
1da177e4
LT		 1446 return err;
1447}
1448
cdd4e68b
TM		 1449static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1450{
1451 struct nfs4_opendata *data = calldata;
1452
1453 data->rpc_status = task->tk_status;
26e976a8 1454 if (data->rpc_status == 0) {
f597c537 1455 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1456 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1457 renew_lease(data->o_res.server, data->timestamp);
3e309914 1458 data->rpc_done = 1;
26e976a8 1459 }
cdd4e68b
TM		 1460}
1461
1462static void nfs4_open_confirm_release(void *calldata)
1463{
1464 struct nfs4_opendata *data = calldata;
1465 struct nfs4_state *state = NULL;
1466
1467 /* If this request hasn't been cancelled, do nothing */
1468 if (data->cancelled == 0)
1469 goto out_free;
1470 /* In case of error, no cleanup! */
3e309914 1471 if (!data->rpc_done)
cdd4e68b 1472 goto out_free;
cdd4e68b 1473 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1474 if (!IS_ERR(state))
643168c2 1475 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1476out_free:
c6d00e63 1477 nfs4_opendata_put(data);
cdd4e68b
TM		 1478}
1479
1480static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1481 .rpc_call_done = nfs4_open_confirm_done,
1482 .rpc_release = nfs4_open_confirm_release,
1483};
1484
1485/*
1486 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1487 */
1488static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1489{
1490 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1491 struct rpc_task *task;
5138fde0
TM		 1492 struct rpc_message msg = {
1493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1494 .rpc_argp = &data->c_arg,
1495 .rpc_resp = &data->c_res,
1496 .rpc_cred = data->owner->so_cred,
1497 };
c970aa85
TM		 1498 struct rpc_task_setup task_setup_data = {
1499 .rpc_client = server->client,
5138fde0 1500 .rpc_message = &msg,
c970aa85
TM		 1501 .callback_ops = &nfs4_open_confirm_ops,
1502 .callback_data = data,
101070ca 1503 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1504 .flags = RPC_TASK_ASYNC,
1505 };
1da177e4
LT		 1506 int status;
1507
c6d00e63 1508 kref_get(&data->kref);
3e309914
TM		 1509 data->rpc_done = 0;
1510 data->rpc_status = 0;
5138fde0 1511 data->timestamp = jiffies;
c970aa85 1512 task = rpc_run_task(&task_setup_data);
7a1218a2 1513 if (IS_ERR(task))
cdd4e68b 1514 return PTR_ERR(task);
cdd4e68b
TM		 1515 status = nfs4_wait_for_completion_rpc_task(task);
1516 if (status != 0) {
1517 data->cancelled = 1;
1518 smp_wmb();
1519 } else
1520 status = data->rpc_status;
e6b3c4db 1521 rpc_put_task(task);
1da177e4
LT		 1522 return status;
1523}
1524
24ac23ab 1525static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1526{
24ac23ab
TM		 1527 struct nfs4_opendata *data = calldata;
1528 struct nfs4_state_owner *sp = data->owner;
5138fde0 1529
24ac23ab 1530 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1531 goto out_wait;
aac00a8d
TM		 1532 /*
1533 * Check if we still need to send an OPEN call, or if we can use
1534 * a delegation instead.
1535 */
1536 if (data->state != NULL) {
1537 struct nfs_delegation *delegation;
1538
dc0b027d 1539 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1540 goto out_no_action;
aac00a8d
TM		 1541 rcu_read_lock();
1542 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1543 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1544 can_open_delegated(delegation, data->o_arg.fmode))
1545 goto unlock_no_action;
aac00a8d
TM		 1546 rcu_read_unlock();
1547 }
95b72eb0 1548 /* Update client id. */
1f0e890d 1549 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1550 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1551 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1552 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1553 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1554 }
26e976a8 1555 data->timestamp = jiffies;
035168ab 1556 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1557 &data->o_arg.seq_args,
2240a9e2
TM		 1558 &data->o_res.seq_res,
1559 task) != 0)
1560 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1561 return;
652f89f6
TM		 1562unlock_no_action:
1563 rcu_read_unlock();
6ee41268
TM		 1564out_no_action:
1565 task->tk_action = NULL;
c8da19b9 1566out_wait:
b75ad4cd 1567 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1568}
1569
24ac23ab
TM		 1570static void nfs4_open_done(struct rpc_task *task, void *calldata)
1571{
1572 struct nfs4_opendata *data = calldata;
1da177e4 1573
24ac23ab 1574 data->rpc_status = task->tk_status;
d898528c 1575
14516c3a
TM		 1576 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1577 return;
d898528c 1578
24ac23ab 1579 if (task->tk_status == 0) {
807d66d8
TM		 1580 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1581 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1582 case S_IFREG:
1583 break;
1584 case S_IFLNK:
24ac23ab 1585 data->rpc_status = -ELOOP;
6f926b5b
TM		 1586 break;
1587 case S_IFDIR:
24ac23ab 1588 data->rpc_status = -EISDIR;
6f926b5b
TM		 1589 break;
1590 default:
24ac23ab 1591 data->rpc_status = -ENOTDIR;
807d66d8 1592 }
6f926b5b 1593 }
26e976a8 1594 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1595 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1596 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1597 }
3e309914 1598 data->rpc_done = 1;
24ac23ab 1599}
6f926b5b 1600
24ac23ab
TM		 1601static void nfs4_open_release(void *calldata)
1602{
1603 struct nfs4_opendata *data = calldata;
1604 struct nfs4_state *state = NULL;
1605
1606 /* If this request hasn't been cancelled, do nothing */
1607 if (data->cancelled == 0)
1608 goto out_free;
1609 /* In case of error, no cleanup! */
3e309914 1610 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1611 goto out_free;
1612 /* In case we need an open_confirm, no cleanup! */
1613 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1614 goto out_free;
24ac23ab 1615 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1616 if (!IS_ERR(state))
643168c2 1617 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1618out_free:
c6d00e63 1619 nfs4_opendata_put(data);
24ac23ab
TM		 1620}
1621
1622static const struct rpc_call_ops nfs4_open_ops = {
1623 .rpc_call_prepare = nfs4_open_prepare,
1624 .rpc_call_done = nfs4_open_done,
1625 .rpc_release = nfs4_open_release,
1626};
1627
b257957e 1628static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1629{
1630 struct inode *dir = data->dir->d_inode;
1631 struct nfs_server *server = NFS_SERVER(dir);
1632 struct nfs_openargs *o_arg = &data->o_arg;
1633 struct nfs_openres *o_res = &data->o_res;
1634 struct rpc_task *task;
5138fde0
TM		 1635 struct rpc_message msg = {
1636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1637 .rpc_argp = o_arg,
1638 .rpc_resp = o_res,
1639 .rpc_cred = data->owner->so_cred,
1640 };
c970aa85
TM		 1641 struct rpc_task_setup task_setup_data = {
1642 .rpc_client = server->client,
5138fde0 1643 .rpc_message = &msg,
c970aa85
TM		 1644 .callback_ops = &nfs4_open_ops,
1645 .callback_data = data,
101070ca 1646 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1647 .flags = RPC_TASK_ASYNC,
1648 };
24ac23ab
TM		 1649 int status;
1650
9d12b216 1651 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1652 kref_get(&data->kref);
3e309914
TM		 1653 data->rpc_done = 0;
1654 data->rpc_status = 0;
2ced46c2 1655 data->cancelled = 0;
b257957e 1656 if (isrecover)
8fe72bac 1657 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1658 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1659 if (IS_ERR(task))
1660 return PTR_ERR(task);
1661 status = nfs4_wait_for_completion_rpc_task(task);
1662 if (status != 0) {
1663 data->cancelled = 1;
1664 smp_wmb();
1665 } else
1666 status = data->rpc_status;
1667 rpc_put_task(task);
1668
1669 return status;
1670}
1671
1672static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1673{
1674 struct inode *dir = data->dir->d_inode;
1675 struct nfs_openres *o_res = &data->o_res;
1676 int status;
1677
1678 status = nfs4_run_open_task(data, 1);
1679 if (status != 0 || !data->rpc_done)
1680 return status;
1681
6926afd1
TM		 1682 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1683
b257957e
AB		 1684 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1685 status = _nfs4_proc_open_confirm(data);
1686 if (status != 0)
1687 return status;
1688 }
1689
1690 return status;
1691}
1692
6168f62c
WAA		 1693static int nfs4_opendata_access(struct rpc_cred *cred,
1694 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1695 struct nfs4_state *state, fmode_t fmode,
1696 int openflags)
6168f62c
WAA		 1697{
1698 struct nfs_access_entry cache;
1699 u32 mask;
1700
1701 /* access call failed or for some reason the server doesn't
1702 * support any access modes -- defer access call until later */
1703 if (opendata->o_res.access_supported == 0)
1704 return 0;
1705
1706 mask = 0;
bbd3a8ee 1707 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1708 * write mode bits, but POSIX allows the creating process to write.
1709 * use openflags to check for exec, because fmode won't
1710 * always have FMODE_EXEC set when file open for exec. */
1711 if (openflags & __FMODE_EXEC) {
1712 /* ONLY check for exec rights */
1713 mask = MAY_EXEC;
1714 } else if (fmode & FMODE_READ)
1715 mask = MAY_READ;
6168f62c
WAA		 1716
1717 cache.cred = cred;
1718 cache.jiffies = jiffies;
1719 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1720 nfs_access_add_cache(state->inode, &cache);
1721
bbd3a8ee 1722 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1723 return 0;
1724
1725 /* even though OPEN succeeded, access is denied. Close the file */
1726 nfs4_close_state(state, fmode);
998f40b5 1727 return -EACCES;
6168f62c
WAA		 1728}
1729
b257957e
AB		 1730/*
1731 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1732 */
1733static int _nfs4_proc_open(struct nfs4_opendata *data)
1734{
1735 struct inode *dir = data->dir->d_inode;
1736 struct nfs_server *server = NFS_SERVER(dir);
1737 struct nfs_openargs *o_arg = &data->o_arg;
1738 struct nfs_openres *o_res = &data->o_res;
1739 int status;
1740
1741 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1742 if (!data->rpc_done)
1743 return status;
1744 if (status != 0) {
1745 if (status == -NFS4ERR_BADNAME &&
1746 !(o_arg->open_flags & O_CREAT))
1747 return -ENOENT;
24ac23ab 1748 return status;
08ef7bd3 1749 }
24ac23ab 1750
6926afd1
TM		 1751 nfs_fattr_map_and_free_names(server, &data->f_attr);
1752
90ff0c54 1753 if (o_arg->open_flags & O_CREAT)
56ae19f3 1754 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1755 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1756 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1757 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1758 status = _nfs4_proc_open_confirm(data);
1da177e4 1759 if (status != 0)
24ac23ab 1760 return status;
1da177e4
LT		 1761 }
1762 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1763 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1764 return 0;
1da177e4
LT		 1765}
1766
d83217c1
AA		 1767static int nfs4_recover_expired_lease(struct nfs_server *server)
1768{
1769 return nfs4_client_recover_expired_lease(server->nfs_client);
1770}
1771
1da177e4
LT		 1772/*
1773 * OPEN_EXPIRED:
1774 * reclaim state on the server after a network partition.
1775 * Assumes caller holds the appropriate lock
1776 */
539cd03a 1777static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1778{
e56e0b78 1779 struct nfs4_opendata *opendata;
864472e9 1780 int ret;
1da177e4 1781
4a1c0893 1782 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1783 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1784 if (IS_ERR(opendata))
1785 return PTR_ERR(opendata);
864472e9 1786 ret = nfs4_open_recover(opendata, state);
35d05778 1787 if (ret == -ESTALE)
3d4ff43d 1788 d_drop(ctx->dentry);
c6d00e63 1789 nfs4_opendata_put(opendata);
864472e9 1790 return ret;
1da177e4
LT		 1791}
1792
a9ed2e25 1793static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1794{
539cd03a 1795 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1796 struct nfs4_exception exception = { };
1797 int err;
1798
1799 do {
539cd03a 1800 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1801 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1802 continue;
a9ed2e25
TM		 1803 switch (err) {
1804 default:
1805 goto out;
1806 case -NFS4ERR_GRACE:
1807 case -NFS4ERR_DELAY:
1808 nfs4_handle_exception(server, err, &exception);
1809 err = 0;
1810 }
202b50dc 1811 } while (exception.retry);
a9ed2e25 1812out:
202b50dc
TM		 1813 return err;
1814}
1815
1da177e4
LT		 1816static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1817{
1da177e4 1818 struct nfs_open_context *ctx;
864472e9 1819 int ret;
1da177e4 1820
864472e9
TM		 1821 ctx = nfs4_state_find_open_context(state);
1822 if (IS_ERR(ctx))
91876b13 1823 return -EAGAIN;
539cd03a 1824 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1825 put_nfs_open_context(ctx);
1826 return ret;
1da177e4
LT		 1827}
1828
f062eb6c 1829#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1830static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1831{
f062eb6c 1832 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1833 nfs4_stateid *stateid = &state->stateid;
1834 int status;
1835
1836 /* If a state reset has been done, test_stateid is unneeded */
1837 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1838 return;
1839
1840 status = nfs41_test_stateid(server, stateid);
1841 if (status != NFS_OK) {
1842 /* Free the stateid unless the server explicitly
1843 * informs us the stateid is unrecognized. */
1844 if (status != -NFS4ERR_BAD_STATEID)
1845 nfs41_free_stateid(server, stateid);
6938867e 1846 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1847
6938867e
BS		 1848 write_seqlock(&state->seqlock);
1849 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1850 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1851 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1852 }
1853}
1854
1855/**
1856 * nfs41_check_open_stateid - possibly free an open stateid
1857 *
1858 * @state: NFSv4 state for an inode
1859 *
1860 * Returns NFS_OK if recovery for this stateid is now finished.
1861 * Otherwise a negative NFS4ERR value is returned.
1862 */
1863static int nfs41_check_open_stateid(struct nfs4_state *state)
1864{
1865 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1866 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1867 int status;
1868
1869 /* If a state reset has been done, test_stateid is unneeded */
1870 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1871 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1872 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1873 return -NFS4ERR_BAD_STATEID;
1874
1875 status = nfs41_test_stateid(server, stateid);
1876 if (status != NFS_OK) {
1877 /* Free the stateid unless the server explicitly
1878 * informs us the stateid is unrecognized. */
1879 if (status != -NFS4ERR_BAD_STATEID)
1880 nfs41_free_stateid(server, stateid);
1881
1882 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1883 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1884 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1885 }
1886 return status;
1887}
1888
1889static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1890{
eb64cf96 1891 int status;
b01dd1d8 1892
3e60ffdd
CL		 1893 nfs41_clear_delegation_stateid(state);
1894 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1895 if (status != NFS_OK)
1896 status = nfs4_open_expired(sp, state);
1897 return status;
f062eb6c
BS		 1898}
1899#endif
1900
aa53ed54
JL		 1901/*
1902 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1903 * fields corresponding to attributes that were used to store the verifier.
1904 * Make sure we clobber those fields in the later setattr call
1905 */
1906static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1907{
1908 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1909 !(sattr->ia_valid & ATTR_ATIME_SET))
1910 sattr->ia_valid |= ATTR_ATIME;
1911
1912 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1913 !(sattr->ia_valid & ATTR_MTIME_SET))
1914 sattr->ia_valid |= ATTR_MTIME;
1915}
1916
c21443c2
TM		 1917static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1918 fmode_t fmode,
1919 int flags,
1920 struct nfs4_state **res)
1921{
1922 struct nfs4_state_owner *sp = opendata->owner;
1923 struct nfs_server *server = sp->so_server;
1924 struct nfs4_state *state;
1925 unsigned int seq;
1926 int ret;
1927
1928 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1929
1930 ret = _nfs4_proc_open(opendata);
1931 if (ret != 0)
1932 goto out;
1933
1934 state = nfs4_opendata_to_nfs4_state(opendata);
1935 ret = PTR_ERR(state);
1936 if (IS_ERR(state))
1937 goto out;
1938 if (server->caps & NFS_CAP_POSIX_LOCK)
1939 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1940
1941 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1942 if (ret != 0)
1943 goto out;
1944
91876b13 1945 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1946 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1947 *res = state;
1948out:
1949 return ret;
1950}
1951
1da177e4 1952/*
24ac23ab 1953 * Returns a referenced nfs4_state
1da177e4 1954 */
82be417a
AA		 1955static int _nfs4_do_open(struct inode *dir,
1956 struct dentry *dentry,
1957 fmode_t fmode,
1958 int flags,
1959 struct iattr *sattr,
1960 struct rpc_cred *cred,
1961 struct nfs4_state **res,
1962 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1963{
1964 struct nfs4_state_owner *sp;
1965 struct nfs4_state *state = NULL;
1966 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1967 struct nfs4_opendata *opendata;
49f9a0fa 1968 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 1969 int status;
1da177e4
LT		 1970
1971 /* Protect against reboot recovery conflicts */
1da177e4 1972 status = -ENOMEM;
d1e284d5
TM		 1973 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1974 if (sp == NULL) {
1da177e4
LT		 1975 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1976 goto out_err;
1977 }
58d9714a
TM		 1978 status = nfs4_recover_expired_lease(server);
1979 if (status != 0)
b4454fe1 1980 goto err_put_state_owner;
82a2c1b7
AV		 1981 if (dentry->d_inode != NULL)
1982 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1983 status = -ENOMEM;
49f9a0fa
TM		 1984 if (dentry->d_inode)
1985 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 1986 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 1987 claim, GFP_KERNEL);
e56e0b78 1988 if (opendata == NULL)
95d35cb4 1989 goto err_put_state_owner;
1da177e4 1990
82be417a
AA		 1991 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1992 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1993 if (!opendata->f_attr.mdsthreshold)
1994 goto err_opendata_put;
1549210f 1995 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1996 }
82a2c1b7
AV		 1997 if (dentry->d_inode != NULL)
1998 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1999
c21443c2 2000 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 2001 if (status != 0)
2002 goto err_opendata_put;
2003
0ab64e0e
TM		 2004 if (opendata->o_arg.open_flags & O_EXCL) {
2005 nfs4_exclusive_attrset(opendata, sattr);
2006
2007 nfs_fattr_init(opendata->o_res.f_attr);
2008 status = nfs4_do_setattr(state->inode, cred,
2009 opendata->o_res.f_attr, sattr,
2010 state);
2011 if (status == 0)
2012 nfs_setattr_update_inode(state->inode, sattr);
2013 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2014 }
82be417a
AA		 2015
2016 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2017 *ctx_th = opendata->f_attr.mdsthreshold;
2018 else
2019 kfree(opendata->f_attr.mdsthreshold);
2020 opendata->f_attr.mdsthreshold = NULL;
2021
c6d00e63 2022 nfs4_opendata_put(opendata);
1da177e4 2023 nfs4_put_state_owner(sp);
1da177e4
LT		 2024 *res = state;
2025 return 0;
c6d00e63 2026err_opendata_put:
82be417a 2027 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2028 nfs4_opendata_put(opendata);
e56e0b78
TM		 2029err_put_state_owner:
2030 nfs4_put_state_owner(sp);
1da177e4 2031out_err:
1da177e4
LT		 2032 *res = NULL;
2033 return status;
2034}
2035
2036
82be417a
AA		 2037static struct nfs4_state *nfs4_do_open(struct inode *dir,
2038 struct dentry *dentry,
2039 fmode_t fmode,
2040 int flags,
2041 struct iattr *sattr,
2042 struct rpc_cred *cred,
2043 struct nfs4_threshold **ctx_th)
1da177e4 2044{
49f9a0fa 2045 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2046 struct nfs4_exception exception = { };
2047 struct nfs4_state *res;
2048 int status;
2049
6168f62c 2050 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2051 do {
82be417a
AA		 2052 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2053 &res, ctx_th);
1da177e4
LT		 2054 if (status == 0)
2055 break;
2056 /* NOTE: BAD_SEQID means the server and client disagree about the
2057 * book-keeping w.r.t. state-changing operations
2058 * (OPEN/CLOSE/LOCK/LOCKU...)
2059 * It is actually a sign of a bug on the client or on the server.
2060 *
2061 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2062 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2063 * have unhashed the old state_owner for us, and that we can
2064 * therefore safely retry using a new one. We should still warn
2065 * the user though...
2066 */
2067 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2068 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2069 " returned a bad sequence-id error!\n",
2070 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2071 exception.retry = 1;
2072 continue;
2073 }
550f5747
TM		 2074 /*
2075 * BAD_STATEID on OPEN means that the server cancelled our
2076 * state before it received the OPEN_CONFIRM.
2077 * Recover by retrying the request as per the discussion
2078 * on Page 181 of RFC3530.
2079 */
2080 if (status == -NFS4ERR_BAD_STATEID) {
2081 exception.retry = 1;
2082 continue;
2083 }
aac00a8d
TM		 2084 if (status == -EAGAIN) {
2085 /* We must have found a delegation */
2086 exception.retry = 1;
2087 continue;
2088 }
49f9a0fa
TM		 2089 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2090 continue;
2091 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2092 status, &exception));
2093 } while (exception.retry);
2094 return res;
2095}
2096
659bfcd6
TM		 2097static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2098 struct nfs_fattr *fattr, struct iattr *sattr,
2099 struct nfs4_state *state)
1da177e4 2100{
3e4f6290 2101 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2102 struct nfs_setattrargs arg = {
3e4f6290 2103 .fh = NFS_FH(inode),
1da177e4
LT		 2104 .iap = sattr,
2105 .server = server,
2106 .bitmask = server->attr_bitmask,
2107 };
2108 struct nfs_setattrres res = {
2109 .fattr = fattr,
2110 .server = server,
2111 };
2112 struct rpc_message msg = {
659bfcd6
TM		 2113 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2114 .rpc_argp = &arg,
2115 .rpc_resp = &res,
2116 .rpc_cred = cred,
1da177e4 2117 };
26e976a8 2118 unsigned long timestamp = jiffies;
65e4308d 2119 int status;
1da177e4 2120
0e574af1 2121 nfs_fattr_init(fattr);
1da177e4 2122
5d422301 2123 if (state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2124 struct nfs_lockowner lockowner = {
2125 .l_owner = current->files,
2126 .l_pid = current->tgid,
2127 };
4fc8796d 2128 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2129 &lockowner);
4fc8796d
TM		 2130 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2131 FMODE_WRITE)) {
3e4f6290 2132 /* Use that stateid */
08e9eac4 2133 } else
f597c537 2134 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2135
7c513058 2136 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2137 if (status == 0 && state != NULL)
2138 renew_lease(server, timestamp);
65e4308d 2139 return status;
1da177e4
LT		 2140}
2141
659bfcd6
TM		 2142static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2143 struct nfs_fattr *fattr, struct iattr *sattr,
2144 struct nfs4_state *state)
1da177e4 2145{
3e4f6290 2146 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2147 struct nfs4_exception exception = {
2148 .state = state,
3114ea7a 2149 .inode = inode,
a1d0b5ee 2150 };
1da177e4
LT		 2151 int err;
2152 do {
451146be
TM		 2153 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2154 switch (err) {
2155 case -NFS4ERR_OPENMODE:
2156 if (state && !(state->state & FMODE_WRITE)) {
2157 err = -EBADF;
2158 if (sattr->ia_valid & ATTR_OPEN)
2159 err = -EACCES;
2160 goto out;
2161 }
2162 }
2163 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2164 } while (exception.retry);
451146be 2165out:
1da177e4
LT		 2166 return err;
2167}
2168
2169struct nfs4_closedata {
2170 struct inode *inode;
2171 struct nfs4_state *state;
2172 struct nfs_closeargs arg;
2173 struct nfs_closeres res;
516a6af6 2174 struct nfs_fattr fattr;
26e976a8 2175 unsigned long timestamp;
f7e8917a
FI		 2176 bool roc;
2177 u32 roc_barrier;
1da177e4
LT		 2178};
2179
963d8fe5 2180static void nfs4_free_closedata(void *data)
9512135d 2181{
963d8fe5
TM		 2182 struct nfs4_closedata *calldata = data;
2183 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2184 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2185
f7e8917a
FI		 2186 if (calldata->roc)
2187 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2188 nfs4_put_open_state(calldata->state);
2189 nfs_free_seqid(calldata->arg.seqid);
9512135d 2190 nfs4_put_state_owner(sp);
322b2b90 2191 nfs_sb_deactive(sb);
9512135d
TM		 2192 kfree(calldata);
2193}
2194
88069f77
TM		 2195static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2196 fmode_t fmode)
2197{
2198 spin_lock(&state->owner->so_lock);
2199 if (!(fmode & FMODE_READ))
2200 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2201 if (!(fmode & FMODE_WRITE))
2202 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2203 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2204 spin_unlock(&state->owner->so_lock);
2205}
2206
963d8fe5 2207static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2208{
963d8fe5 2209 struct nfs4_closedata *calldata = data;
1da177e4 2210 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2211 struct nfs_server *server = NFS_SERVER(calldata->inode);
2212
a3ca5651 2213 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2214 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2215 return;
1da177e4
LT		 2216 /* hmm. we are done with the inode, and in the process of freeing
2217 * the state_owner. we keep this around to process errors
2218 */
1da177e4
LT		 2219 switch (task->tk_status) {
2220 case 0:
f7e8917a
FI		 2221 if (calldata->roc)
2222 pnfs_roc_set_barrier(state->inode,
2223 calldata->roc_barrier);
45328c35 2224 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2225 renew_lease(server, calldata->timestamp);
88069f77
TM		 2226 nfs4_close_clear_stateid_flags(state,
2227 calldata->arg.fmode);
1da177e4
LT		 2228 break;
2229 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2230 case -NFS4ERR_OLD_STATEID:
2231 case -NFS4ERR_BAD_STATEID:
1da177e4 2232 case -NFS4ERR_EXPIRED:
dc0b027d 2233 if (calldata->arg.fmode == 0)
9e33bed5 2234 break;
1da177e4 2235 default:
72211dbe
TM		 2236 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2237 rpc_restart_call_prepare(task);
1da177e4 2238 }
72211dbe 2239 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2240 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2241 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2242}
2243
4ce70ada 2244static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2245{
4ce70ada 2246 struct nfs4_closedata *calldata = data;
9512135d 2247 struct nfs4_state *state = calldata->state;
7fdab069 2248 struct inode *inode = calldata->inode;
88069f77 2249 int call_close = 0;
9512135d 2250
a3ca5651 2251 dprintk("%s: begin!\n", __func__);
963d8fe5 2252 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2253 goto out_wait;
003707c7 2254
88069f77
TM		 2255 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2256 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2257 spin_lock(&state->owner->so_lock);
003707c7 2258 /* Calculate the change in open mode */
e7616923 2259 if (state->n_rdwr == 0) {
003707c7 2260 if (state->n_rdonly == 0) {
88069f77
TM		 2261 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2262 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2263 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2264 }
2265 if (state->n_wronly == 0) {
88069f77
TM		 2266 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2267 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2268 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2269 }
e7616923 2270 }
5d422301
TM		 2271 if (!nfs4_valid_open_stateid(state))
2272 call_close = 0;
4cecb76f 2273 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2274
2275 if (!call_close) {
963d8fe5 2276 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2277 goto out_no_action;
9512135d 2278 }
88069f77 2279
f7e8917a 2280 if (calldata->arg.fmode == 0) {
88069f77 2281 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2282 if (calldata->roc &&
7fdab069 2283 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
c8da19b9 2284 goto out_wait;
f7e8917a 2285 }
88069f77 2286
516a6af6 2287 nfs_fattr_init(calldata->res.fattr);
26e976a8 2288 calldata->timestamp = jiffies;
7fdab069 2289 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2290 &calldata->arg.seq_args,
2291 &calldata->res.seq_res,
2240a9e2
TM		 2292 task) != 0)
2293 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2294 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2295 return;
2296out_no_action:
2297 task->tk_action = NULL;
2298out_wait:
2299 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2300}
2301
963d8fe5 2302static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2303 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2304 .rpc_call_done = nfs4_close_done,
2305 .rpc_release = nfs4_free_closedata,
2306};
2307
1da177e4
LT		 2308/*
2309 * It is possible for data to be read/written from a mem-mapped file
2310 * after the sys_close call (which hits the vfs layer as a flush).
2311 * This means that we can't safely call nfsv4 close on a file until
2312 * the inode is cleared. This in turn means that we are not good
2313 * NFSv4 citizens - we do not indicate to the server to update the file's
2314 * share state even when we are done with one of the three share
2315 * stateid's in the inode.
2316 *
2317 * NOTE: Caller must be holding the sp->so_owner semaphore!
2318 */
1f7977c1 2319int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2320{
4a35bd41 2321 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2322 struct nfs4_closedata *calldata;
b39e625b
TM		 2323 struct nfs4_state_owner *sp = state->owner;
2324 struct rpc_task *task;
5138fde0
TM		 2325 struct rpc_message msg = {
2326 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2327 .rpc_cred = state->owner->so_cred,
2328 };
c970aa85
TM		 2329 struct rpc_task_setup task_setup_data = {
2330 .rpc_client = server->client,
5138fde0 2331 .rpc_message = &msg,
c970aa85 2332 .callback_ops = &nfs4_close_ops,
101070ca 2333 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2334 .flags = RPC_TASK_ASYNC,
2335 };
9512135d 2336 int status = -ENOMEM;
1da177e4 2337
8535b2be 2338 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2339 if (calldata == NULL)
9512135d 2340 goto out;
9d12b216 2341 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2342 calldata->inode = state->inode;
1da177e4 2343 calldata->state = state;
4a35bd41 2344 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2345 calldata->arg.stateid = &state->open_stateid;
1da177e4 2346 /* Serialization for the sequence id */
8535b2be 2347 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2348 if (calldata->arg.seqid == NULL)
2349 goto out_free_calldata;
dc0b027d 2350 calldata->arg.fmode = 0;
a65318bf 2351 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2352 calldata->res.fattr = &calldata->fattr;
c1d51931 2353 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2354 calldata->res.server = server;
1f7977c1 2355 calldata->roc = pnfs_roc(state->inode);
643168c2 2356 nfs_sb_active(calldata->inode->i_sb);
9512135d 2357
1174dd1f
TM		 2358 msg.rpc_argp = &calldata->arg;
2359 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2360 task_setup_data.callback_data = calldata;
2361 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2362 if (IS_ERR(task))
2363 return PTR_ERR(task);
a49c3c77
TM		 2364 status = 0;
2365 if (wait)
2366 status = rpc_wait_for_completion_task(task);
b39e625b 2367 rpc_put_task(task);
a49c3c77 2368 return status;
9512135d
TM		 2369out_free_calldata:
2370 kfree(calldata);
2371out:
b39e625b
TM		 2372 nfs4_put_open_state(state);
2373 nfs4_put_state_owner(sp);
9512135d 2374 return status;
1da177e4
LT		 2375}
2376
2b484297 2377static struct inode *
cd9a1c0e 2378nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2379{
1da177e4 2380 struct nfs4_state *state;
1da177e4 2381
565277f6 2382 /* Protect against concurrent sillydeletes */
82be417a
AA		 2383 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2384 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2385 if (IS_ERR(state))
2386 return ERR_CAST(state);
cd9a1c0e 2387 ctx->state = state;
f46e0bd3 2388 return igrab(state->inode);
1da177e4
LT		 2389}
2390
1185a552 2391static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2392{
2393 if (ctx->state == NULL)
2394 return;
2395 if (is_sync)
643168c2 2396 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2397 else
643168c2 2398 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2399}
1da177e4
LT		 2400
2401static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2402{
43652ad5
BH		 2403 struct nfs4_server_caps_arg args = {
2404 .fhandle = fhandle,
2405 };
1da177e4
LT		 2406 struct nfs4_server_caps_res res = {};
2407 struct rpc_message msg = {
2408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2409 .rpc_argp = &args,
1da177e4
LT		 2410 .rpc_resp = &res,
2411 };
2412 int status;
2413
7c513058 2414 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2415 if (status == 0) {
2416 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2417 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2418 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2419 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2420 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2421 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2422 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2423 server->caps |= NFS_CAP_ACLS;
2424 if (res.has_links != 0)
2425 server->caps |= NFS_CAP_HARDLINKS;
2426 if (res.has_symlinks != 0)
2427 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2428 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2429 server->caps |= NFS_CAP_FILEID;
2430 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2431 server->caps |= NFS_CAP_MODE;
2432 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2433 server->caps |= NFS_CAP_NLINK;
2434 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2435 server->caps |= NFS_CAP_OWNER;
2436 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2437 server->caps |= NFS_CAP_OWNER_GROUP;
2438 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2439 server->caps |= NFS_CAP_ATIME;
2440 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2441 server->caps |= NFS_CAP_CTIME;
2442 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2443 server->caps |= NFS_CAP_MTIME;
2444
a65318bf
TM		 2445 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2446 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2447 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2448 server->acl_bitmask = res.acl_bitmask;
264e6351 2449 server->fh_expire_type = res.fh_expire_type;
1da177e4 2450 }
cccef3b9 2451
1da177e4
LT		 2452 return status;
2453}
2454
55a97593 2455int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2456{
2457 struct nfs4_exception exception = { };
2458 int err;
2459 do {
2460 err = nfs4_handle_exception(server,
2461 _nfs4_server_capabilities(server, fhandle),
2462 &exception);
2463 } while (exception.retry);
2464 return err;
2465}
2466
2467static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2468 struct nfs_fsinfo *info)
2469{
1da177e4
LT		 2470 struct nfs4_lookup_root_arg args = {
2471 .bitmask = nfs4_fattr_bitmap,
2472 };
2473 struct nfs4_lookup_res res = {
2474 .server = server,
0e574af1 2475 .fattr = info->fattr,
1da177e4
LT		 2476 .fh = fhandle,
2477 };
2478 struct rpc_message msg = {
2479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2480 .rpc_argp = &args,
2481 .rpc_resp = &res,
2482 };
008f55d0 2483
0e574af1 2484 nfs_fattr_init(info->fattr);
7c513058 2485 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2486}
2487
2488static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2489 struct nfs_fsinfo *info)
2490{
2491 struct nfs4_exception exception = { };
2492 int err;
2493 do {
fb8a5ba8
BS		 2494 err = _nfs4_lookup_root(server, fhandle, info);
2495 switch (err) {
2496 case 0:
2497 case -NFS4ERR_WRONGSEC:
05e9cfb4 2498 goto out;
fb8a5ba8
BS		 2499 default:
2500 err = nfs4_handle_exception(server, err, &exception);
2501 }
1da177e4 2502 } while (exception.retry);
05e9cfb4 2503out:
1da177e4
LT		 2504 return err;
2505}
2506
8f70e95f
BS		 2507static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2508 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2509{
2510 struct rpc_auth *auth;
2511 int ret;
2512
2513 auth = rpcauth_create(flavor, server->client);
e8d920c5 2514 if (IS_ERR(auth)) {
8f70e95f
BS		 2515 ret = -EIO;
2516 goto out;
2517 }
2518 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2519out:
2520 return ret;
2521}
2522
801a16dc 2523static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2524 struct nfs_fsinfo *info)
1da177e4 2525{
8f70e95f 2526 int i, len, status = 0;
0fabee24 2527 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2528
6a1a1e34 2529 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2530 if (len < 0)
2531 return len;
8f70e95f
BS		 2532
2533 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2534 /* AUTH_UNIX is the default flavor if none was specified,
2535 * thus has already been tried. */
2536 if (flav_array[i] == RPC_AUTH_UNIX)
2537 continue;
2538
8f70e95f 2539 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2540 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2541 continue;
2542 break;
8f70e95f 2543 }
fb8a5ba8
BS		 2544 /*
2545 * -EACCESS could mean that the user doesn't have correct permissions
2546 * to access the mount. It could also mean that we tried to mount
2547 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2548 * existing mount programs don't handle -EACCES very well so it should
2549 * be mapped to -EPERM instead.
2550 */
2551 if (status == -EACCES)
2552 status = -EPERM;
801a16dc
BS		 2553 return status;
2554}
2555
2556/*
2557 * get the file handle for the "/" directory on the server
2558 */
3028eb2b
BS		 2559int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2560 struct nfs_fsinfo *info)
801a16dc 2561{
fca78d6d 2562 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2563 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2564 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2565 /*
2566 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2567 * by nfs4_map_errors() as this function exits.
2568 */
fca78d6d 2569 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2570 if (status == 0)
2571 status = nfs4_server_capabilities(server, fhandle);
2572 if (status == 0)
2573 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2574 return nfs4_map_errors(status);
1da177e4
LT		 2575}
2576
bae36241
BS		 2577static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2578 struct nfs_fsinfo *info)
2579{
2580 int error;
2581 struct nfs_fattr *fattr = info->fattr;
2582
2583 error = nfs4_server_capabilities(server, mntfh);
2584 if (error < 0) {
2585 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2586 return error;
2587 }
2588
2589 error = nfs4_proc_getattr(server, mntfh, fattr);
2590 if (error < 0) {
2591 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2592 return error;
2593 }
2594
2595 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2596 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2597 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2598
2599 return error;
2600}
2601
6b97fd3d
MN		 2602/*
2603 * Get locations and (maybe) other attributes of a referral.
2604 * Note that we'll actually follow the referral later when
2605 * we detect fsid mismatch in inode revalidation
2606 */
f05d147f
BS		 2607static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2608 const struct qstr *name, struct nfs_fattr *fattr,
2609 struct nfs_fh *fhandle)
6b97fd3d
MN		 2610{
2611 int status = -ENOMEM;
2612 struct page *page = NULL;
2613 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2614
2615 page = alloc_page(GFP_KERNEL);
2616 if (page == NULL)
2617 goto out;
2618 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2619 if (locations == NULL)
2620 goto out;
2621
f05d147f 2622 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2623 if (status != 0)
2624 goto out;
2625 /* Make sure server returned a different fsid for the referral */
2626 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2627 dprintk("%s: server did not return a different fsid for"
2628 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2629 status = -EIO;
2630 goto out;
2631 }
533eb461
AA		 2632 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2633 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2634
533eb461 2635 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2636 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2637 memset(fhandle, 0, sizeof(struct nfs_fh));
2638out:
2639 if (page)
2640 __free_page(page);
5d7ca35a 2641 kfree(locations);
6b97fd3d
MN		 2642 return status;
2643}
2644
1da177e4
LT		 2645static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2646{
2647 struct nfs4_getattr_arg args = {
2648 .fh = fhandle,
2649 .bitmask = server->attr_bitmask,
2650 };
2651 struct nfs4_getattr_res res = {
2652 .fattr = fattr,
2653 .server = server,
2654 };
2655 struct rpc_message msg = {
2656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2657 .rpc_argp = &args,
2658 .rpc_resp = &res,
2659 };
2660
0e574af1 2661 nfs_fattr_init(fattr);
7c513058 2662 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2663}
2664
2665static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2666{
2667 struct nfs4_exception exception = { };
2668 int err;
2669 do {
2670 err = nfs4_handle_exception(server,
2671 _nfs4_proc_getattr(server, fhandle, fattr),
2672 &exception);
2673 } while (exception.retry);
2674 return err;
2675}
2676
2677/*
2678 * The file is not closed if it is opened due to the a request to change
2679 * the size of the file. The open call will not be needed once the
2680 * VFS layer lookup-intents are implemented.
2681 *
2682 * Close is called when the inode is destroyed.
2683 * If we haven't opened the file for O_WRONLY, we
2684 * need to in the size_change case to obtain a stateid.
2685 *
2686 * Got race?
2687 * Because OPEN is always done by name in nfsv4, it is
2688 * possible that we opened a different file by the same
2689 * name. We can recognize this race condition, but we
2690 * can't do anything about it besides returning an error.
2691 *
2692 * This will be fixed with VFS changes (lookup-intent).
2693 */
2694static int
2695nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2696 struct iattr *sattr)
2697{
08e9eac4 2698 struct inode *inode = dentry->d_inode;
659bfcd6 2699 struct rpc_cred *cred = NULL;
d530838b 2700 struct nfs4_state *state = NULL;
1da177e4
LT		 2701 int status;
2702
8a1636c4 2703 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2704 pnfs_commit_and_return_layout(inode);
8a1636c4 2705
0e574af1 2706 nfs_fattr_init(fattr);
1da177e4 2707
2669940d
AA		 2708 /* Deal with open(O_TRUNC) */
2709 if (sattr->ia_valid & ATTR_OPEN)
2710 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2711
2712 /* Optimization: if the end result is no change, don't RPC */
2713 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2714 return 0;
2715
d530838b 2716 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2717 if (sattr->ia_valid & ATTR_FILE) {
2718 struct nfs_open_context *ctx;
2719
2720 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2721 if (ctx) {
2722 cred = ctx->cred;
2723 state = ctx->state;
2724 }
659bfcd6 2725 }
08e9eac4 2726
659bfcd6 2727 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2728 if (status == 0)
2729 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2730 return status;
2731}
2732
0c2e53f1
TM		 2733static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2734 const struct qstr *name, struct nfs_fh *fhandle,
2735 struct nfs_fattr *fattr)
2b3de441 2736{
0c2e53f1 2737 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2738 int status;
2739 struct nfs4_lookup_arg args = {
2740 .bitmask = server->attr_bitmask,
0c2e53f1 2741 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2742 .name = name,
2743 };
2744 struct nfs4_lookup_res res = {
2745 .server = server,
2746 .fattr = fattr,
2747 .fh = fhandle,
2748 };
2749 struct rpc_message msg = {
2750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2751 .rpc_argp = &args,
2752 .rpc_resp = &res,
2753 };
2754
2755 nfs_fattr_init(fattr);
2756
1da177e4 2757 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2758 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2759 dprintk("NFS reply lookup: %d\n", status);
2760 return status;
2761}
2762
72de53ec 2763static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2764{
7ebb9315 2765 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2766 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2767 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2768 fattr->nlink = 2;
2769}
2770
72de53ec
BS		 2771static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2772 struct qstr *name, struct nfs_fh *fhandle,
2773 struct nfs_fattr *fattr)
1da177e4
LT		 2774{
2775 struct nfs4_exception exception = { };
72de53ec 2776 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2777 int err;
2778 do {
72de53ec
BS		 2779 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2780 switch (err) {
08ef7bd3 2781 case -NFS4ERR_BADNAME:
72de53ec
BS		 2782 err = -ENOENT;
2783 goto out;
0c2e53f1 2784 case -NFS4ERR_MOVED:
f05d147f 2785 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2786 goto out;
0c2e53f1 2787 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2788 err = -EPERM;
2789 if (client != *clnt)
2790 goto out;
2791
2792 client = nfs4_create_sec_client(client, dir, name);
2793 if (IS_ERR(client))
2794 return PTR_ERR(client);
2795
2796 exception.retry = 1;
2797 break;
2798 default:
2799 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2800 }
1da177e4 2801 } while (exception.retry);
72de53ec
BS		 2802
2803out:
2804 if (err == 0)
2805 *clnt = client;
2806 else if (client != *clnt)
2807 rpc_shutdown_client(client);
2808
1da177e4
LT		 2809 return err;
2810}
2811
80a16b21 2812static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2813 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2814{
2815 int status;
2816 struct rpc_clnt *client = NFS_CLIENT(dir);
2817
2818 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2819 if (client != NFS_CLIENT(dir)) {
2820 rpc_shutdown_client(client);
2821 nfs_fixup_secinfo_attributes(fattr);
2822 }
2823 return status;
2824}
2825
f05d147f
BS		 2826struct rpc_clnt *
2827nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2828 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2829{
2830 int status;
2831 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2832
2833 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2834 if (status < 0) {
2835 rpc_shutdown_client(client);
2836 return ERR_PTR(status);
2837 }
2838 return client;
2839}
2840
1da177e4
LT		 2841static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2842{
76b32999 2843 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2844 struct nfs4_accessargs args = {
2845 .fh = NFS_FH(inode),
a4980e78 2846 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2847 };
2848 struct nfs4_accessres res = {
2849 .server = server,
1da177e4 2850 };
1da177e4
LT		 2851 struct rpc_message msg = {
2852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2853 .rpc_argp = &args,
2854 .rpc_resp = &res,
2855 .rpc_cred = entry->cred,
2856 };
2857 int mode = entry->mask;
2858 int status;
2859
2860 /*
2861 * Determine which access bits we want to ask for...
2862 */
2863 if (mode & MAY_READ)
2864 args.access |= NFS4_ACCESS_READ;
2865 if (S_ISDIR(inode->i_mode)) {
2866 if (mode & MAY_WRITE)
2867 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2868 if (mode & MAY_EXEC)
2869 args.access |= NFS4_ACCESS_LOOKUP;
2870 } else {
2871 if (mode & MAY_WRITE)
2872 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2873 if (mode & MAY_EXEC)
2874 args.access |= NFS4_ACCESS_EXECUTE;
2875 }
c407d41a
TM		 2876
2877 res.fattr = nfs_alloc_fattr();
2878 if (res.fattr == NULL)
2879 return -ENOMEM;
2880
7c513058 2881 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2882 if (!status) {
6168f62c 2883 nfs_access_set_mask(entry, res.access);
c407d41a 2884 nfs_refresh_inode(inode, res.fattr);
1da177e4 2885 }
c407d41a 2886 nfs_free_fattr(res.fattr);
1da177e4
LT		 2887 return status;
2888}
2889
2890static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2891{
2892 struct nfs4_exception exception = { };
2893 int err;
2894 do {
2895 err = nfs4_handle_exception(NFS_SERVER(inode),
2896 _nfs4_proc_access(inode, entry),
2897 &exception);
2898 } while (exception.retry);
2899 return err;
2900}
2901
2902/*
2903 * TODO: For the time being, we don't try to get any attributes
2904 * along with any of the zero-copy operations READ, READDIR,
2905 * READLINK, WRITE.
2906 *
2907 * In the case of the first three, we want to put the GETATTR
2908 * after the read-type operation -- this is because it is hard
2909 * to predict the length of a GETATTR response in v4, and thus
2910 * align the READ data correctly. This means that the GETATTR
2911 * may end up partially falling into the page cache, and we should
2912 * shift it into the 'tail' of the xdr_buf before processing.
2913 * To do this efficiently, we need to know the total length
2914 * of data received, which doesn't seem to be available outside
2915 * of the RPC layer.
2916 *
2917 * In the case of WRITE, we also want to put the GETATTR after
2918 * the operation -- in this case because we want to make sure
140150db 2919 * we get the post-operation mtime and size.
1da177e4
LT		 2920 *
2921 * Both of these changes to the XDR layer would in fact be quite
2922 * minor, but I decided to leave them for a subsequent patch.
2923 */
2924static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2925 unsigned int pgbase, unsigned int pglen)
2926{
2927 struct nfs4_readlink args = {
2928 .fh = NFS_FH(inode),
2929 .pgbase = pgbase,
2930 .pglen = pglen,
2931 .pages = &page,
2932 };
f50c7000 2933 struct nfs4_readlink_res res;
1da177e4
LT		 2934 struct rpc_message msg = {
2935 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2936 .rpc_argp = &args,
f50c7000 2937 .rpc_resp = &res,
1da177e4
LT		 2938 };
2939
7c513058 2940 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2941}
2942
2943static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2944 unsigned int pgbase, unsigned int pglen)
2945{
2946 struct nfs4_exception exception = { };
2947 int err;
2948 do {
2949 err = nfs4_handle_exception(NFS_SERVER(inode),
2950 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2951 &exception);
2952 } while (exception.retry);
2953 return err;
2954}
2955
1da177e4 2956/*
8867fe58 2957 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2958 */
1da177e4
LT		 2959static int
2960nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2961 int flags)
1da177e4 2962{
8867fe58 2963 struct nfs_open_context *ctx;
1da177e4 2964 struct nfs4_state *state;
1da177e4
LT		 2965 int status = 0;
2966
8867fe58
MS		 2967 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2968 if (IS_ERR(ctx))
2969 return PTR_ERR(ctx);
2970
a8a5da99 2971 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2972 state = nfs4_do_open(dir, dentry, ctx->mode,
2973 flags, sattr, ctx->cred,
2974 &ctx->mdsthreshold);
d4d9cdcb 2975 d_drop(dentry);
1da177e4
LT		 2976 if (IS_ERR(state)) {
2977 status = PTR_ERR(state);
c0204fd2 2978 goto out;
1da177e4 2979 }
d4d9cdcb 2980 d_add(dentry, igrab(state->inode));
d75340cc 2981 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2982 ctx->state = state;
1da177e4 2983out:
8867fe58 2984 put_nfs_open_context(ctx);
1da177e4
LT		 2985 return status;
2986}
2987
2988static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2989{
16e42959 2990 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2991 struct nfs_removeargs args = {
1da177e4 2992 .fh = NFS_FH(dir),
26fe5750 2993 .name = *name,
16e42959 2994 };
4fdc17b2 2995 struct nfs_removeres res = {
16e42959 2996 .server = server,
1da177e4 2997 };
1da177e4 2998 struct rpc_message msg = {
4fdc17b2
TM		 2999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3000 .rpc_argp = &args,
3001 .rpc_resp = &res,
1da177e4 3002 };
778d2817 3003 int status;
1da177e4 3004
7c513058 3005 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3006 if (status == 0)
16e42959 3007 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3008 return status;
3009}
3010
3011static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3012{
3013 struct nfs4_exception exception = { };
3014 int err;
3015 do {
3016 err = nfs4_handle_exception(NFS_SERVER(dir),
3017 _nfs4_proc_remove(dir, name),
3018 &exception);
3019 } while (exception.retry);
3020 return err;
3021}
3022
e4eff1a6 3023static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3024{
e4eff1a6
TM		 3025 struct nfs_server *server = NFS_SERVER(dir);
3026 struct nfs_removeargs *args = msg->rpc_argp;
3027 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3028
e4eff1a6 3029 res->server = server;
1da177e4 3030 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3031 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3032}
3033
34e137cc
BS		 3034static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3035{
d9afbd1b
TM		 3036 nfs4_setup_sequence(NFS_SERVER(data->dir),
3037 &data->args.seq_args,
3038 &data->res.seq_res,
3039 task);
1da177e4
LT		 3040}
3041
e4eff1a6 3042static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3043{
e4eff1a6
TM		 3044 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3045
14516c3a
TM		 3046 if (!nfs4_sequence_done(task, &res->seq_res))
3047 return 0;
9e33bed5 3048 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3049 return 0;
3050 update_changeattr(dir, &res->cinfo);
e4eff1a6 3051 return 1;
1da177e4
LT		 3052}
3053
d3d4152a
JL		 3054static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3055{
3056 struct nfs_server *server = NFS_SERVER(dir);
3057 struct nfs_renameargs *arg = msg->rpc_argp;
3058 struct nfs_renameres *res = msg->rpc_resp;
3059
3060 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3061 res->server = server;
9d12b216 3062 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3063}
3064
c6bfa1a1
BS		 3065static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3066{
d9afbd1b
TM		 3067 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3068 &data->args.seq_args,
3069 &data->res.seq_res,
3070 task);
d3d4152a
JL		 3071}
3072
3073static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3074 struct inode *new_dir)
3075{
3076 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3077
3078 if (!nfs4_sequence_done(task, &res->seq_res))
3079 return 0;
3080 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3081 return 0;
3082
3083 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3084 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3085 return 1;
3086}
3087
1da177e4
LT		 3088static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3089 struct inode *new_dir, struct qstr *new_name)
3090{
6caf2c82 3091 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3092 struct nfs_renameargs arg = {
1da177e4
LT		 3093 .old_dir = NFS_FH(old_dir),
3094 .new_dir = NFS_FH(new_dir),
3095 .old_name = old_name,
3096 .new_name = new_name,
6caf2c82 3097 };
e8582a8b 3098 struct nfs_renameres res = {
6caf2c82 3099 .server = server,
1da177e4 3100 };
1da177e4
LT		 3101 struct rpc_message msg = {
3102 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3103 .rpc_argp = &arg,
3104 .rpc_resp = &res,
3105 };
011fff72 3106 int status = -ENOMEM;
1da177e4 3107
7c513058 3108 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3109 if (!status) {
3110 update_changeattr(old_dir, &res.old_cinfo);
3111 update_changeattr(new_dir, &res.new_cinfo);
3112 }
3113 return status;
3114}
3115
3116static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3117 struct inode *new_dir, struct qstr *new_name)
3118{
3119 struct nfs4_exception exception = { };
3120 int err;
3121 do {
3122 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3123 _nfs4_proc_rename(old_dir, old_name,
3124 new_dir, new_name),
3125 &exception);
3126 } while (exception.retry);
3127 return err;
3128}
3129
3130static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3131{
91ba2eee 3132 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3133 struct nfs4_link_arg arg = {
3134 .fh = NFS_FH(inode),
3135 .dir_fh = NFS_FH(dir),
3136 .name = name,
91ba2eee
TM		 3137 .bitmask = server->attr_bitmask,
3138 };
91ba2eee
TM		 3139 struct nfs4_link_res res = {
3140 .server = server,
1da177e4 3141 };
1da177e4
LT		 3142 struct rpc_message msg = {
3143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3144 .rpc_argp = &arg,
91ba2eee 3145 .rpc_resp = &res,
1da177e4 3146 };
136f2627
TM		 3147 int status = -ENOMEM;
3148
3149 res.fattr = nfs_alloc_fattr();
778d2817 3150 if (res.fattr == NULL)
136f2627 3151 goto out;
1da177e4 3152
7c513058 3153 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3154 if (!status) {
3155 update_changeattr(dir, &res.cinfo);
73a3d07c 3156 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3157 }
136f2627 3158out:
136f2627 3159 nfs_free_fattr(res.fattr);
1da177e4
LT		 3160 return status;
3161}
3162
3163static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3164{
3165 struct nfs4_exception exception = { };
3166 int err;
3167 do {
3168 err = nfs4_handle_exception(NFS_SERVER(inode),
3169 _nfs4_proc_link(inode, dir, name),
3170 &exception);
3171 } while (exception.retry);
3172 return err;
3173}
3174
57dc9a57
TM		 3175struct nfs4_createdata {
3176 struct rpc_message msg;
3177 struct nfs4_create_arg arg;
3178 struct nfs4_create_res res;
3179 struct nfs_fh fh;
3180 struct nfs_fattr fattr;
57dc9a57
TM		 3181};
3182
3183static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3184 struct qstr *name, struct iattr *sattr, u32 ftype)
3185{
3186 struct nfs4_createdata *data;
3187
3188 data = kzalloc(sizeof(*data), GFP_KERNEL);
3189 if (data != NULL) {
3190 struct nfs_server *server = NFS_SERVER(dir);
3191
3192 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3193 data->msg.rpc_argp = &data->arg;
3194 data->msg.rpc_resp = &data->res;
3195 data->arg.dir_fh = NFS_FH(dir);
3196 data->arg.server = server;
3197 data->arg.name = name;
3198 data->arg.attrs = sattr;
3199 data->arg.ftype = ftype;
3200 data->arg.bitmask = server->attr_bitmask;
3201 data->res.server = server;
3202 data->res.fh = &data->fh;
3203 data->res.fattr = &data->fattr;
57dc9a57 3204 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3205 }
3206 return data;
3207}
3208
3209static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3210{
7c513058 3211 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3212 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3213 if (status == 0) {
3214 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3215 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3216 }
3217 return status;
3218}
3219
3220static void nfs4_free_createdata(struct nfs4_createdata *data)
3221{
3222 kfree(data);
3223}
3224
4f390c15 3225static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3226 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3227{
57dc9a57
TM		 3228 struct nfs4_createdata *data;
3229 int status = -ENAMETOOLONG;
1da177e4 3230
94a6d753 3231 if (len > NFS4_MAXPATHLEN)
57dc9a57 3232 goto out;
4f390c15 3233
57dc9a57
TM		 3234 status = -ENOMEM;
3235 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3236 if (data == NULL)
3237 goto out;
3238
3239 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3240 data->arg.u.symlink.pages = &page;
3241 data->arg.u.symlink.len = len;
1da177e4 3242
57dc9a57
TM		 3243 status = nfs4_do_create(dir, dentry, data);
3244
3245 nfs4_free_createdata(data);
3246out:
1da177e4
LT		 3247 return status;
3248}
3249
4f390c15 3250static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3251 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3252{
3253 struct nfs4_exception exception = { };
3254 int err;
3255 do {
3256 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3257 _nfs4_proc_symlink(dir, dentry, page,
3258 len, sattr),
1da177e4
LT		 3259 &exception);
3260 } while (exception.retry);
3261 return err;
3262}
3263
3264static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3265 struct iattr *sattr)
3266{
57dc9a57
TM		 3267 struct nfs4_createdata *data;
3268 int status = -ENOMEM;
1da177e4 3269
57dc9a57
TM		 3270 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3271 if (data == NULL)
3272 goto out;
3273
3274 status = nfs4_do_create(dir, dentry, data);
3275
3276 nfs4_free_createdata(data);
3277out:
1da177e4
LT		 3278 return status;
3279}
3280
3281static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3282 struct iattr *sattr)
3283{
3284 struct nfs4_exception exception = { };
3285 int err;
a8a5da99
AK		 3286
3287 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3288 do {
3289 err = nfs4_handle_exception(NFS_SERVER(dir),
3290 _nfs4_proc_mkdir(dir, dentry, sattr),
3291 &exception);
3292 } while (exception.retry);
3293 return err;
3294}
3295
3296static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3297 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3298{
3299 struct inode *dir = dentry->d_inode;
3300 struct nfs4_readdir_arg args = {
3301 .fh = NFS_FH(dir),
56e4ebf8 3302 .pages = pages,
1da177e4
LT		 3303 .pgbase = 0,
3304 .count = count,
96d25e53 3305 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3306 .plus = plus,
1da177e4
LT		 3307 };
3308 struct nfs4_readdir_res res;
3309 struct rpc_message msg = {
3310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3311 .rpc_argp = &args,
3312 .rpc_resp = &res,
3313 .rpc_cred = cred,
3314 };
3315 int status;
3316
3110ff80 3317 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3318 dentry->d_parent->d_name.name,
3319 dentry->d_name.name,
3320 (unsigned long long)cookie);
c3f52af3 3321 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3322 res.pgbase = args.pgbase;
7c513058 3323 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3324 if (status >= 0) {
c3f52af3 3325 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3326 status += args.pgbase;
3327 }
c4812998
TM		 3328
3329 nfs_invalidate_atime(dir);
3330
3110ff80 3331 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3332 return status;
3333}
3334
3335static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3336 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3337{
3338 struct nfs4_exception exception = { };
3339 int err;
3340 do {
3341 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3342 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3343 pages, count, plus),
1da177e4
LT		 3344 &exception);
3345 } while (exception.retry);
3346 return err;
3347}
3348
3349static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3350 struct iattr *sattr, dev_t rdev)
3351{
57dc9a57
TM		 3352 struct nfs4_createdata *data;
3353 int mode = sattr->ia_mode;
3354 int status = -ENOMEM;
1da177e4 3355
57dc9a57
TM		 3356 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3357 if (data == NULL)
3358 goto out;
3359
1da177e4 3360 if (S_ISFIFO(mode))
57dc9a57 3361 data->arg.ftype = NF4FIFO;
1da177e4 3362 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3363 data->arg.ftype = NF4BLK;
3364 data->arg.u.device.specdata1 = MAJOR(rdev);
3365 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3366 }
3367 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3368 data->arg.ftype = NF4CHR;
3369 data->arg.u.device.specdata1 = MAJOR(rdev);
3370 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3371 } else if (!S_ISSOCK(mode)) {
3372 status = -EINVAL;
3373 goto out_free;
1da177e4 3374 }
1da177e4 3375
57dc9a57 3376 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3377out_free:
57dc9a57
TM		 3378 nfs4_free_createdata(data);
3379out:
1da177e4
LT		 3380 return status;
3381}
3382
3383static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3384 struct iattr *sattr, dev_t rdev)
3385{
3386 struct nfs4_exception exception = { };
3387 int err;
a8a5da99
AK		 3388
3389 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3390 do {
3391 err = nfs4_handle_exception(NFS_SERVER(dir),
3392 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3393 &exception);
3394 } while (exception.retry);
3395 return err;
3396}
3397
3398static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3399 struct nfs_fsstat *fsstat)
3400{
3401 struct nfs4_statfs_arg args = {
3402 .fh = fhandle,
3403 .bitmask = server->attr_bitmask,
3404 };
24ad148a
BH		 3405 struct nfs4_statfs_res res = {
3406 .fsstat = fsstat,
3407 };
1da177e4
LT		 3408 struct rpc_message msg = {
3409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3410 .rpc_argp = &args,
24ad148a 3411 .rpc_resp = &res,
1da177e4
LT		 3412 };
3413
0e574af1 3414 nfs_fattr_init(fsstat->fattr);
7c513058 3415 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3416}
3417
3418static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3419{
3420 struct nfs4_exception exception = { };
3421 int err;
3422 do {
3423 err = nfs4_handle_exception(server,
3424 _nfs4_proc_statfs(server, fhandle, fsstat),
3425 &exception);
3426 } while (exception.retry);
3427 return err;
3428}
3429
3430static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3431 struct nfs_fsinfo *fsinfo)
3432{
3433 struct nfs4_fsinfo_arg args = {
3434 .fh = fhandle,
3435 .bitmask = server->attr_bitmask,
3436 };
3dda5e43
BH		 3437 struct nfs4_fsinfo_res res = {
3438 .fsinfo = fsinfo,
3439 };
1da177e4
LT		 3440 struct rpc_message msg = {
3441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3442 .rpc_argp = &args,
3dda5e43 3443 .rpc_resp = &res,
1da177e4
LT		 3444 };
3445
7c513058 3446 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3447}
3448
3449static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3450{
3451 struct nfs4_exception exception = { };
3452 int err;
3453
3454 do {
3455 err = nfs4_handle_exception(server,
3456 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3457 &exception);
3458 } while (exception.retry);
3459 return err;
3460}
3461
3462static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3463{
e38eb650
BS		 3464 int error;
3465
0e574af1 3466 nfs_fattr_init(fsinfo->fattr);
e38eb650 3467 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3468 if (error == 0) {
3469 /* block layout checks this! */
3470 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3471 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3472 }
e38eb650
BS		 3473
3474 return error;
1da177e4
LT		 3475}
3476
3477static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3478 struct nfs_pathconf *pathconf)
3479{
3480 struct nfs4_pathconf_arg args = {
3481 .fh = fhandle,
3482 .bitmask = server->attr_bitmask,
3483 };
d45b2989
BH		 3484 struct nfs4_pathconf_res res = {
3485 .pathconf = pathconf,
3486 };
1da177e4
LT		 3487 struct rpc_message msg = {
3488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3489 .rpc_argp = &args,
d45b2989 3490 .rpc_resp = &res,
1da177e4
LT		 3491 };
3492
3493 /* None of the pathconf attributes are mandatory to implement */
3494 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3495 memset(pathconf, 0, sizeof(*pathconf));
3496 return 0;
3497 }
3498
0e574af1 3499 nfs_fattr_init(pathconf->fattr);
7c513058 3500 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3501}
3502
3503static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3504 struct nfs_pathconf *pathconf)
3505{
3506 struct nfs4_exception exception = { };
3507 int err;
3508
3509 do {
3510 err = nfs4_handle_exception(server,
3511 _nfs4_proc_pathconf(server, fhandle, pathconf),
3512 &exception);
3513 } while (exception.retry);
3514 return err;
3515}
3516
5521abfd 3517int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3518 const struct nfs_open_context *ctx,
3519 const struct nfs_lock_context *l_ctx,
3520 fmode_t fmode)
3521{
3522 const struct nfs_lockowner *lockowner = NULL;
3523
3524 if (l_ctx != NULL)
3525 lockowner = &l_ctx->lockowner;
5521abfd 3526 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3527}
3528EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3529
5521abfd
TM		 3530static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3531 const struct nfs_open_context *ctx,
3532 const struct nfs_lock_context *l_ctx,
3533 fmode_t fmode)
3534{
3535 nfs4_stateid current_stateid;
3536
3537 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3538 return false;
3539 return nfs4_stateid_match(stateid, &current_stateid);
3540}
3541
3542static bool nfs4_error_stateid_expired(int err)
3543{
3544 switch (err) {
3545 case -NFS4ERR_DELEG_REVOKED:
3546 case -NFS4ERR_ADMIN_REVOKED:
3547 case -NFS4ERR_BAD_STATEID:
3548 case -NFS4ERR_STALE_STATEID:
3549 case -NFS4ERR_OLD_STATEID:
3550 case -NFS4ERR_OPENMODE:
3551 case -NFS4ERR_EXPIRED:
3552 return true;
3553 }
3554 return false;
3555}
3556
d20581aa
BH		 3557void __nfs4_read_done_cb(struct nfs_read_data *data)
3558{
cd841605 3559 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3560}
3561
cbdabc7f 3562static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3563{
cd841605 3564 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3565
9e33bed5 3566 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3567 rpc_restart_call_prepare(task);
ec06c096 3568 return -EAGAIN;
1da177e4 3569 }
8850df99 3570
d20581aa 3571 __nfs4_read_done_cb(data);
1da177e4 3572 if (task->tk_status > 0)
ec06c096
TM		 3573 renew_lease(server, data->timestamp);
3574 return 0;
1da177e4
LT		 3575}
3576
5521abfd
TM		 3577static bool nfs4_read_stateid_changed(struct rpc_task *task,
3578 struct nfs_readargs *args)
3579{
3580
3581 if (!nfs4_error_stateid_expired(task->tk_status) ||
3582 nfs4_stateid_is_current(&args->stateid,
3583 args->context,
3584 args->lock_context,
3585 FMODE_READ))
3586 return false;
3587 rpc_restart_call_prepare(task);
3588 return true;
3589}
3590
cbdabc7f
AA		 3591static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3592{
3593
3594 dprintk("--> %s\n", __func__);
3595
3596 if (!nfs4_sequence_done(task, &data->res.seq_res))
3597 return -EAGAIN;
5521abfd
TM		 3598 if (nfs4_read_stateid_changed(task, &data->args))
3599 return -EAGAIN;
d20581aa
BH		 3600 return data->read_done_cb ? data->read_done_cb(task, data) :
3601 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3602}
3603
bdc7f021 3604static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3605{
1da177e4 3606 data->timestamp = jiffies;
cbdabc7f 3607 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3608 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3609 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3610}
3611
ea7c3303
BS		 3612static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3613{
9b206149 3614 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3615 &data->args.seq_args,
3616 &data->res.seq_res,
9b206149
TM		 3617 task))
3618 return;
3619 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3620 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3621}
3622
b029bc9b 3623static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3624{
cd841605 3625 struct inode *inode = data->header->inode;
1da177e4 3626
9e33bed5 3627 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3628 rpc_restart_call_prepare(task);
788e7a89 3629 return -EAGAIN;
1da177e4 3630 }
4f9838c7 3631 if (task->tk_status >= 0) {
1da177e4 3632 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3633 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3634 }
788e7a89 3635 return 0;
1da177e4
LT		 3636}
3637
5521abfd
TM		 3638static bool nfs4_write_stateid_changed(struct rpc_task *task,
3639 struct nfs_writeargs *args)
3640{
3641
3642 if (!nfs4_error_stateid_expired(task->tk_status) ||
3643 nfs4_stateid_is_current(&args->stateid,
3644 args->context,
3645 args->lock_context,
3646 FMODE_WRITE))
3647 return false;
3648 rpc_restart_call_prepare(task);
3649 return true;
3650}
3651
b029bc9b
FI		 3652static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3653{
3654 if (!nfs4_sequence_done(task, &data->res.seq_res))
3655 return -EAGAIN;
5521abfd
TM		 3656 if (nfs4_write_stateid_changed(task, &data->args))
3657 return -EAGAIN;
d20581aa
BH		 3658 return data->write_done_cb ? data->write_done_cb(task, data) :
3659 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3660}
3661
5a37f851
TM		 3662static
3663bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3664{
5a37f851
TM		 3665 const struct nfs_pgio_header *hdr = data->header;
3666
3667 /* Don't request attributes for pNFS or O_DIRECT writes */
3668 if (data->ds_clp != NULL || hdr->dreq != NULL)
3669 return false;
3670 /* Otherwise, request attributes if and only if we don't hold
3671 * a delegation
3672 */
011e2a7f 3673 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3674}
a69aef14 3675
bdc7f021 3676static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3677{
cd841605 3678 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3679
5a37f851 3680 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3681 data->args.bitmask = NULL;
3682 data->res.fattr = NULL;
3683 } else
3684 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3685
b029bc9b
FI		 3686 if (!data->write_done_cb)
3687 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3688 data->res.server = server;
1da177e4
LT		 3689 data->timestamp = jiffies;
3690
bdc7f021 3691 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3692 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3693}
3694
c6cb80d0
BS		 3695static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3696{
9b206149 3697 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3698 &data->args.seq_args,
3699 &data->res.seq_res,
9b206149
TM		 3700 task))
3701 return;
3702 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3703 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3704}
3705
0b7c0153 3706static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3707{
d9afbd1b
TM		 3708 nfs4_setup_sequence(NFS_SERVER(data->inode),
3709 &data->args.seq_args,
3710 &data->res.seq_res,
3711 task);
1da177e4
LT		 3712}
3713
0b7c0153 3714static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3715{
1da177e4 3716 struct inode *inode = data->inode;
14516c3a 3717
9e33bed5 3718 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3719 rpc_restart_call_prepare(task);
788e7a89 3720 return -EAGAIN;
1da177e4 3721 }
788e7a89 3722 return 0;
1da177e4
LT		 3723}
3724
0b7c0153 3725static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3726{
3727 if (!nfs4_sequence_done(task, &data->res.seq_res))
3728 return -EAGAIN;
0b7c0153 3729 return data->commit_done_cb(task, data);
5f452431
FI		 3730}
3731
0b7c0153 3732static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3733{
788e7a89 3734 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3735
0b7c0153
FI		 3736 if (data->commit_done_cb == NULL)
3737 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3738 data->res.server = server;
bdc7f021 3739 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3740 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3741}
3742
9bc4e3ca
CL		 3743struct nfs4_renewdata {
3744 struct nfs_client *client;
3745 unsigned long timestamp;
3746};
3747
1da177e4
LT		 3748/*
3749 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3750 * standalone procedure for queueing an asynchronous RENEW.
3751 */
9bc4e3ca 3752static void nfs4_renew_release(void *calldata)
dc96aef9 3753{
9bc4e3ca
CL		 3754 struct nfs4_renewdata *data = calldata;
3755 struct nfs_client *clp = data->client;
dc96aef9 3756
0851de06
AB		 3757 if (atomic_read(&clp->cl_count) > 1)
3758 nfs4_schedule_state_renewal(clp);
3759 nfs_put_client(clp);
9bc4e3ca 3760 kfree(data);
dc96aef9
AB		 3761}
3762
9bc4e3ca 3763static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3764{
9bc4e3ca
CL		 3765 struct nfs4_renewdata *data = calldata;
3766 struct nfs_client *clp = data->client;
3767 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3768
3769 if (task->tk_status < 0) {
95baa25c 3770 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3771 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3772 return;
3773 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3774 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3775 return;
3776 }
3777 nfs4_schedule_path_down_recovery(clp);
1da177e4 3778 }
452e9352 3779 do_renew_lease(clp, timestamp);
1da177e4
LT		 3780}
3781
963d8fe5
TM		 3782static const struct rpc_call_ops nfs4_renew_ops = {
3783 .rpc_call_done = nfs4_renew_done,
dc96aef9 3784 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3785};
3786
2f60ea6b 3787static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3788{
3789 struct rpc_message msg = {
3790 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3791 .rpc_argp = clp,
b4454fe1 3792 .rpc_cred = cred,
1da177e4 3793 };
9bc4e3ca 3794 struct nfs4_renewdata *data;
1da177e4 3795
2f60ea6b
TM		 3796 if (renew_flags == 0)
3797 return 0;
0851de06
AB		 3798 if (!atomic_inc_not_zero(&clp->cl_count))
3799 return -EIO;
b569ad34 3800 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3801 if (data == NULL)
3802 return -ENOMEM;
3803 data->client = clp;
3804 data->timestamp = jiffies;
1da177e4 3805 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3806 &nfs4_renew_ops, data);
1da177e4
LT		 3807}
3808
8534d4ec 3809static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3810{
3811 struct rpc_message msg = {
3812 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3813 .rpc_argp = clp,
b4454fe1 3814 .rpc_cred = cred,
1da177e4
LT		 3815 };
3816 unsigned long now = jiffies;
3817 int status;
3818
3819 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3820 if (status < 0)
3821 return status;
452e9352 3822 do_renew_lease(clp, now);
1da177e4
LT		 3823 return 0;
3824}
3825
aa1870af
BF		 3826static inline int nfs4_server_supports_acls(struct nfs_server *server)
3827{
3828 return (server->caps & NFS_CAP_ACLS)
3829 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3830 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3831}
3832
21f498c2
TM		 3833/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3834 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3835 * the stack.
3836 */
21f498c2 3837#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3838
e9e3d724
NH		 3839static int buf_to_pages_noslab(const void *buf, size_t buflen,
3840 struct page **pages, unsigned int *pgbase)
3841{
3842 struct page *newpage, **spages;
3843 int rc = 0;
3844 size_t len;
3845 spages = pages;
3846
3847 do {
21f498c2 3848 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3849 newpage = alloc_page(GFP_KERNEL);
3850
3851 if (newpage == NULL)
3852 goto unwind;
3853 memcpy(page_address(newpage), buf, len);
3854 buf += len;
3855 buflen -= len;
3856 *pages++ = newpage;
3857 rc++;
3858 } while (buflen != 0);
3859
3860 return rc;
3861
3862unwind:
3863 for(; rc > 0; rc--)
3864 __free_page(spages[rc-1]);
3865 return -ENOMEM;
3866}
3867
e50a1c2e
BF		 3868struct nfs4_cached_acl {
3869 int cached;
3870 size_t len;
3e9d4154 3871 char data[0];
e50a1c2e
BF		 3872};
3873
3874static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3875{
3876 struct nfs_inode *nfsi = NFS_I(inode);
3877
3878 spin_lock(&inode->i_lock);
3879 kfree(nfsi->nfs4_acl);
3880 nfsi->nfs4_acl = acl;
3881 spin_unlock(&inode->i_lock);
3882}
3883
3884static void nfs4_zap_acl_attr(struct inode *inode)
3885{
3886 nfs4_set_cached_acl(inode, NULL);
3887}
3888
3889static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3890{
3891 struct nfs_inode *nfsi = NFS_I(inode);
3892 struct nfs4_cached_acl *acl;
3893 int ret = -ENOENT;
3894
3895 spin_lock(&inode->i_lock);
3896 acl = nfsi->nfs4_acl;
3897 if (acl == NULL)
3898 goto out;
3899 if (buf == NULL) /* user is just asking for length */
3900 goto out_len;
3901 if (acl->cached == 0)
3902 goto out;
3903 ret = -ERANGE; /* see getxattr(2) man page */
3904 if (acl->len > buflen)
3905 goto out;
3906 memcpy(buf, acl->data, acl->len);
3907out_len:
3908 ret = acl->len;
3909out:
3910 spin_unlock(&inode->i_lock);
3911 return ret;
3912}
3913
5794d21e 3914static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3915{
3916 struct nfs4_cached_acl *acl;
b291f1b1 3917 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3918
1f1ea6c2 3919 if (buflen <= PAGE_SIZE) {
b291f1b1 3920 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3921 if (acl == NULL)
3922 goto out;
3923 acl->cached = 1;
5794d21e 3924 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3925 } else {
3926 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3927 if (acl == NULL)
3928 goto out;
3929 acl->cached = 0;
3930 }
3931 acl->len = acl_len;
3932out:
3933 nfs4_set_cached_acl(inode, acl);
3934}
3935
bf118a34
AA		 3936/*
3937 * The getxattr API returns the required buffer length when called with a
3938 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3939 * the required buf. On a NULL buf, we send a page of data to the server
3940 * guessing that the ACL request can be serviced by a page. If so, we cache
3941 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3942 * the cache. If not so, we throw away the page, and cache the required
3943 * length. The next getxattr call will then produce another round trip to
3944 * the server, this time with the input buf of the required size.
3945 */
16b4289c 3946static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3947{
bf118a34 3948 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3949 struct nfs_getaclargs args = {
3950 .fh = NFS_FH(inode),
3951 .acl_pages = pages,
3952 .acl_len = buflen,
3953 };
663c79b3
BH		 3954 struct nfs_getaclres res = {
3955 .acl_len = buflen,
3956 };
aa1870af
BF		 3957 struct rpc_message msg = {
3958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3959 .rpc_argp = &args,
663c79b3 3960 .rpc_resp = &res,
aa1870af 3961 };
21f498c2
TM		 3962 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3963 int ret = -ENOMEM, i;
aa1870af 3964
bf118a34
AA		 3965 /* As long as we're doing a round trip to the server anyway,
3966 * let's be prepared for a page of acl data. */
3967 if (npages == 0)
3968 npages = 1;
21f498c2
TM		 3969 if (npages > ARRAY_SIZE(pages))
3970 return -ERANGE;
5a006899 3971
bf118a34
AA		 3972 for (i = 0; i < npages; i++) {
3973 pages[i] = alloc_page(GFP_KERNEL);
3974 if (!pages[i])
3975 goto out_free;
e50a1c2e 3976 }
5a006899
SP		 3977
3978 /* for decoding across pages */
3979 res.acl_scratch = alloc_page(GFP_KERNEL);
3980 if (!res.acl_scratch)
3981 goto out_free;
3982
bf118a34
AA		 3983 args.acl_len = npages * PAGE_SIZE;
3984 args.acl_pgbase = 0;
5a006899 3985
de040bec 3986 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3987 __func__, buf, buflen, npages, args.acl_len);
3988 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3989 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3990 if (ret)
3991 goto out_free;
bf118a34 3992
1f1ea6c2
TM		 3993 /* Handle the case where the passed-in buffer is too short */
3994 if (res.acl_flags & NFS4_ACL_TRUNC) {
3995 /* Did the user only issue a request for the acl length? */
3996 if (buf == NULL)
3997 goto out_ok;
e50a1c2e 3998 ret = -ERANGE;
1f1ea6c2 3999 goto out_free;
e50a1c2e 4000 }
1f1ea6c2 4001 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4002 if (buf) {
4003 if (res.acl_len > buflen) {
4004 ret = -ERANGE;
4005 goto out_free;
4006 }
1f1ea6c2 4007 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4008 }
1f1ea6c2
TM		 4009out_ok:
4010 ret = res.acl_len;
e50a1c2e 4011out_free:
bf118a34
AA		 4012 for (i = 0; i < npages; i++)
4013 if (pages[i])
4014 __free_page(pages[i]);
331818f1
TM		 4015 if (res.acl_scratch)
4016 __free_page(res.acl_scratch);
aa1870af
BF		 4017 return ret;
4018}
4019
16b4289c
TM		 4020static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4021{
4022 struct nfs4_exception exception = { };
4023 ssize_t ret;
4024 do {
4025 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4026 if (ret >= 0)
4027 break;
4028 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4029 } while (exception.retry);
4030 return ret;
4031}
4032
e50a1c2e
BF		 4033static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4034{
4035 struct nfs_server *server = NFS_SERVER(inode);
4036 int ret;
4037
4038 if (!nfs4_server_supports_acls(server))
4039 return -EOPNOTSUPP;
4040 ret = nfs_revalidate_inode(server, inode);
4041 if (ret < 0)
4042 return ret;
08a22b39
AK		 4043 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4044 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4045 ret = nfs4_read_cached_acl(inode, buf, buflen);
4046 if (ret != -ENOENT)
bf118a34
AA		 4047 /* -ENOENT is returned if there is no ACL or if there is an ACL
4048 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4049 return ret;
4050 return nfs4_get_acl_uncached(inode, buf, buflen);
4051}
4052
16b4289c 4053static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4054{
4055 struct nfs_server *server = NFS_SERVER(inode);
4056 struct page *pages[NFS4ACL_MAXPAGES];
4057 struct nfs_setaclargs arg = {
4058 .fh = NFS_FH(inode),
4059 .acl_pages = pages,
4060 .acl_len = buflen,
4061 };
73c403a9 4062 struct nfs_setaclres res;
4b580ee3
BF		 4063 struct rpc_message msg = {
4064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4065 .rpc_argp = &arg,
73c403a9 4066 .rpc_resp = &res,
4b580ee3 4067 };
21f498c2 4068 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4069 int ret, i;
4b580ee3
BF		 4070
4071 if (!nfs4_server_supports_acls(server))
4072 return -EOPNOTSUPP;
21f498c2
TM		 4073 if (npages > ARRAY_SIZE(pages))
4074 return -ERANGE;
e9e3d724
NH		 4075 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4076 if (i < 0)
4077 return i;
57ec14c5 4078 nfs4_inode_return_delegation(inode);
7c513058 4079 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4080
4081 /*
4082 * Free each page after tx, so the only ref left is
4083 * held by the network stack
4084 */
4085 for (; i > 0; i--)
4086 put_page(pages[i-1]);
4087
08a22b39
AK		 4088 /*
4089 * Acl update can result in inode attribute update.
4090 * so mark the attribute cache invalid.
4091 */
4092 spin_lock(&inode->i_lock);
4093 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4094 spin_unlock(&inode->i_lock);
f41f7418
TM		 4095 nfs_access_zap_cache(inode);
4096 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4097 return ret;
4098}
4099
16b4289c
TM		 4100static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4101{
4102 struct nfs4_exception exception = { };
4103 int err;
4104 do {
4105 err = nfs4_handle_exception(NFS_SERVER(inode),
4106 __nfs4_proc_set_acl(inode, buf, buflen),
4107 &exception);
4108 } while (exception.retry);
4109 return err;
4110}
4111
1da177e4 4112static int
aa5190d0 4113nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4114{
aa5190d0
TM		 4115 struct nfs_client *clp = server->nfs_client;
4116
4117 if (task->tk_status >= 0)
1da177e4
LT		 4118 return 0;
4119 switch(task->tk_status) {
a1d0b5ee 4120 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4121 case -NFS4ERR_ADMIN_REVOKED:
4122 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4123 if (state == NULL)
4124 break;
4125 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4126 case -NFS4ERR_OPENMODE:
4127 if (state == NULL)
4128 break;
5d422301
TM		 4129 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4130 goto stateid_invalid;
0400a6b0 4131 goto wait_on_recovery;
0ced63d1 4132 case -NFS4ERR_EXPIRED:
5d422301
TM		 4133 if (state != NULL) {
4134 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4135 goto stateid_invalid;
4136 }
1da177e4 4137 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4138 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4139 nfs4_schedule_lease_recovery(clp);
4140 goto wait_on_recovery;
4745e315
AA		 4141#if defined(CONFIG_NFS_V4_1)
4142 case -NFS4ERR_BADSESSION:
4143 case -NFS4ERR_BADSLOT:
4144 case -NFS4ERR_BAD_HIGH_SLOT:
4145 case -NFS4ERR_DEADSESSION:
4146 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4147 case -NFS4ERR_SEQ_FALSE_RETRY:
4148 case -NFS4ERR_SEQ_MISORDERED:
4149 dprintk("%s ERROR %d, Reset session\n", __func__,
4150 task->tk_status);
9f594791 4151 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4152 task->tk_status = 0;
4153 return -EAGAIN;
4154#endif /* CONFIG_NFS_V4_1 */
1da177e4 4155 case -NFS4ERR_DELAY:
aa5190d0 4156 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4157 case -NFS4ERR_GRACE:
1da177e4
LT		 4158 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4159 task->tk_status = 0;
4160 return -EAGAIN;
a8a4ae3a 4161 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4162 case -NFS4ERR_OLD_STATEID:
4163 task->tk_status = 0;
4164 return -EAGAIN;
4165 }
4166 task->tk_status = nfs4_map_errors(task->tk_status);
4167 return 0;
5d422301
TM		 4168stateid_invalid:
4169 task->tk_status = -EIO;
4170 return 0;
0400a6b0 4171wait_on_recovery:
a2c0b9e2 4172 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4173 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4174 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4175 task->tk_status = 0;
4176 return -EAGAIN;
1da177e4
LT		 4177}
4178
f092075d
CL		 4179static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4180 nfs4_verifier *bootverf)
cd93710e
CL		 4181{
4182 __be32 verf[2];
4183
2c820d9a
CL		 4184 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4185 /* An impossible timestamp guarantees this value
4186 * will never match a generated boot time. */
4187 verf[0] = 0;
4188 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4189 } else {
f092075d
CL		 4190 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4191 verf[0] = (__be32)nn->boot_time.tv_sec;
4192 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4193 }
cd93710e
CL		 4194 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4195}
4196
e984a55a
CL		 4197static unsigned int
4198nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4199 char *buf, size_t len)
4200{
4201 unsigned int result;
4202
4203 rcu_read_lock();
4204 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4205 clp->cl_ipaddr,
4206 rpc_peeraddr2str(clp->cl_rpcclient,
4207 RPC_DISPLAY_ADDR),
4208 rpc_peeraddr2str(clp->cl_rpcclient,
4209 RPC_DISPLAY_PROTO));
4210 rcu_read_unlock();
4211 return result;
4212}
4213
4214static unsigned int
4215nfs4_init_uniform_client_string(const struct nfs_client *clp,
4216 char *buf, size_t len)
4217{
6f2ea7f2
CL		 4218 char *nodename = clp->cl_rpcclient->cl_nodename;
4219
4220 if (nfs4_client_id_uniquifier[0] != '\0')
4221 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4222 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4223 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4224 nodename);
e984a55a
CL		 4225}
4226
6bbb4ae8
CL		 4227/**
4228 * nfs4_proc_setclientid - Negotiate client ID
4229 * @clp: state data structure
4230 * @program: RPC program for NFSv4 callback service
4231 * @port: IP port number for NFS4 callback service
4232 * @cred: RPC credential to use for this call
4233 * @res: where to place the result
4234 *
4235 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4236 */
bb8b27e5
TM		 4237int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4238 unsigned short port, struct rpc_cred *cred,
4239 struct nfs4_setclientid_res *res)
1da177e4
LT		 4240{
4241 nfs4_verifier sc_verifier;
4242 struct nfs4_setclientid setclientid = {
4243 .sc_verifier = &sc_verifier,
4244 .sc_prog = program,
f4eecd5d 4245 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4246 };
4247 struct rpc_message msg = {
4248 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4249 .rpc_argp = &setclientid,
bb8b27e5 4250 .rpc_resp = res,
286d7d6a 4251 .rpc_cred = cred,
1da177e4 4252 };
6bbb4ae8 4253 int status;
1da177e4 4254
de734831 4255 /* nfs_client_id4 */
f092075d 4256 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4257 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4258 setclientid.sc_name_len =
4259 nfs4_init_uniform_client_string(clp,
4260 setclientid.sc_name,
4261 sizeof(setclientid.sc_name));
4262 else
4263 setclientid.sc_name_len =
4264 nfs4_init_nonuniform_client_string(clp,
4265 setclientid.sc_name,
4266 sizeof(setclientid.sc_name));
de734831 4267 /* cb_client4 */
e984a55a 4268 rcu_read_lock();
de734831 4269 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4270 sizeof(setclientid.sc_netid),
4271 rpc_peeraddr2str(clp->cl_rpcclient,
4272 RPC_DISPLAY_NETID));
de734831
CL		 4273 rcu_read_unlock();
4274 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4275 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4276 clp->cl_ipaddr, port >> 8, port & 255);
4277
6bbb4ae8
CL		 4278 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4279 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4280 setclientid.sc_name_len, setclientid.sc_name);
4281 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4282 dprintk("NFS reply setclientid: %d\n", status);
4283 return status;
1da177e4
LT		 4284}
4285
6bbb4ae8
CL		 4286/**
4287 * nfs4_proc_setclientid_confirm - Confirm client ID
4288 * @clp: state data structure
4289 * @res: result of a previous SETCLIENTID
4290 * @cred: RPC credential to use for this call
4291 *
4292 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4293 */
fd954ae1 4294int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4295 struct nfs4_setclientid_res *arg,
4296 struct rpc_cred *cred)
1da177e4
LT		 4297{
4298 struct nfs_fsinfo fsinfo;
4299 struct rpc_message msg = {
4300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4301 .rpc_argp = arg,
1da177e4 4302 .rpc_resp = &fsinfo,
286d7d6a 4303 .rpc_cred = cred,
1da177e4
LT		 4304 };
4305 unsigned long now;
4306 int status;
4307
6bbb4ae8
CL		 4308 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4309 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4310 clp->cl_clientid);
1da177e4 4311 now = jiffies;
1bd714f2 4312 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4313 if (status == 0) {
4314 spin_lock(&clp->cl_lock);
4315 clp->cl_lease_time = fsinfo.lease_time * HZ;
4316 clp->cl_last_renewal = now;
4317 spin_unlock(&clp->cl_lock);
4318 }
6bbb4ae8 4319 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4320 return status;
4321}
4322
fe650407
TM		 4323struct nfs4_delegreturndata {
4324 struct nfs4_delegreturnargs args;
fa178f29 4325 struct nfs4_delegreturnres res;
fe650407
TM		 4326 struct nfs_fh fh;
4327 nfs4_stateid stateid;
26e976a8 4328 unsigned long timestamp;
fa178f29 4329 struct nfs_fattr fattr;
fe650407
TM		 4330 int rpc_status;
4331};
4332
fe650407
TM		 4333static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4334{
4335 struct nfs4_delegreturndata *data = calldata;
938e1010 4336
14516c3a
TM		 4337 if (!nfs4_sequence_done(task, &data->res.seq_res))
4338 return;
938e1010 4339
79708861
RL		 4340 switch (task->tk_status) {
4341 case -NFS4ERR_STALE_STATEID:
4342 case -NFS4ERR_EXPIRED:
4343 case 0:
fa178f29 4344 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4345 break;
4346 default:
4347 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4348 -EAGAIN) {
d00c5d43 4349 rpc_restart_call_prepare(task);
79708861
RL		 4350 return;
4351 }
4352 }
4353 data->rpc_status = task->tk_status;
fe650407
TM		 4354}
4355
4356static void nfs4_delegreturn_release(void *calldata)
4357{
fe650407
TM		 4358 kfree(calldata);
4359}
4360
938e1010
AA		 4361#if defined(CONFIG_NFS_V4_1)
4362static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4363{
4364 struct nfs4_delegreturndata *d_data;
4365
4366 d_data = (struct nfs4_delegreturndata *)data;
4367
d9afbd1b
TM		 4368 nfs4_setup_sequence(d_data->res.server,
4369 &d_data->args.seq_args,
4370 &d_data->res.seq_res,
4371 task);
938e1010
AA		 4372}
4373#endif /* CONFIG_NFS_V4_1 */
4374
c8d149f3 4375static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4376#if defined(CONFIG_NFS_V4_1)
4377 .rpc_call_prepare = nfs4_delegreturn_prepare,
4378#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4379 .rpc_call_done = nfs4_delegreturn_done,
4380 .rpc_release = nfs4_delegreturn_release,
4381};
4382
e6f81075 4383static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4384{
4385 struct nfs4_delegreturndata *data;
fa178f29 4386 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4387 struct rpc_task *task;
5138fde0
TM		 4388 struct rpc_message msg = {
4389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4390 .rpc_cred = cred,
4391 };
c970aa85
TM		 4392 struct rpc_task_setup task_setup_data = {
4393 .rpc_client = server->client,
5138fde0 4394 .rpc_message = &msg,
c970aa85
TM		 4395 .callback_ops = &nfs4_delegreturn_ops,
4396 .flags = RPC_TASK_ASYNC,
4397 };
e6f81075 4398 int status = 0;
fe650407 4399
8535b2be 4400 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4401 if (data == NULL)
4402 return -ENOMEM;
9d12b216 4403 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4404 data->args.fhandle = &data->fh;
4405 data->args.stateid = &data->stateid;
9e907fec 4406 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4407 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4408 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4409 data->res.fattr = &data->fattr;
4410 data->res.server = server;
5138fde0 4411 nfs_fattr_init(data->res.fattr);
26e976a8 4412 data->timestamp = jiffies;
fe650407
TM		 4413 data->rpc_status = 0;
4414
c970aa85 4415 task_setup_data.callback_data = data;
1174dd1f
TM		 4416 msg.rpc_argp = &data->args;
4417 msg.rpc_resp = &data->res;
c970aa85 4418 task = rpc_run_task(&task_setup_data);
7a1218a2 4419 if (IS_ERR(task))
fe650407 4420 return PTR_ERR(task);
e6f81075
TM		 4421 if (!issync)
4422 goto out;
fe650407 4423 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4424 if (status != 0)
4425 goto out;
4426 status = data->rpc_status;
e144cbcc
TM		 4427 if (status == 0)
4428 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4429 else
4430 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4431out:
e6b3c4db 4432 rpc_put_task(task);
fe650407 4433 return status;
1da177e4
LT		 4434}
4435
e6f81075 4436int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4437{
4438 struct nfs_server *server = NFS_SERVER(inode);
4439 struct nfs4_exception exception = { };
4440 int err;
4441 do {
e6f81075 4442 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4443 switch (err) {
4444 case -NFS4ERR_STALE_STATEID:
4445 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4446 case 0:
4447 return 0;
4448 }
4449 err = nfs4_handle_exception(server, err, &exception);
4450 } while (exception.retry);
4451 return err;
4452}
4453
4454#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4455#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4456
4457/*
4458 * sleep, with exponential backoff, and retry the LOCK operation.
4459 */
4460static unsigned long
4461nfs4_set_lock_task_retry(unsigned long timeout)
4462{
d310310c 4463 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4464 timeout <<= 1;
4465 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4466 return NFS4_LOCK_MAXTIMEOUT;
4467 return timeout;
4468}
4469
1da177e4
LT		 4470static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4471{
4472 struct inode *inode = state->inode;
4473 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4474 struct nfs_client *clp = server->nfs_client;
911d1aaf 4475 struct nfs_lockt_args arg = {
1da177e4 4476 .fh = NFS_FH(inode),
911d1aaf 4477 .fl = request,
1da177e4 4478 };
911d1aaf
TM		 4479 struct nfs_lockt_res res = {
4480 .denied = request,
1da177e4
LT		 4481 };
4482 struct rpc_message msg = {
4483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4484 .rpc_argp = &arg,
4485 .rpc_resp = &res,
4486 .rpc_cred = state->owner->so_cred,
4487 };
1da177e4
LT		 4488 struct nfs4_lock_state *lsp;
4489 int status;
4490
911d1aaf 4491 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4492 status = nfs4_set_lock_state(state, request);
4493 if (status != 0)
4494 goto out;
4495 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4496 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4497 arg.lock_owner.s_dev = server->s_dev;
7c513058 4498 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4499 switch (status) {
4500 case 0:
4501 request->fl_type = F_UNLCK;
4502 break;
4503 case -NFS4ERR_DENIED:
4504 status = 0;
1da177e4 4505 }
70cc6487 4506 request->fl_ops->fl_release_private(request);
8d0a8a9d 4507out:
1da177e4
LT		 4508 return status;
4509}
4510
4511static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4512{
4513 struct nfs4_exception exception = { };
4514 int err;
4515
4516 do {
4517 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4518 _nfs4_proc_getlk(state, cmd, request),
4519 &exception);
4520 } while (exception.retry);
4521 return err;
4522}
4523
4524static int do_vfs_lock(struct file *file, struct file_lock *fl)
4525{
4526 int res = 0;
4527 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4528 case FL_POSIX:
4529 res = posix_lock_file_wait(file, fl);
4530 break;
4531 case FL_FLOCK:
4532 res = flock_lock_file_wait(file, fl);
4533 break;
4534 default:
4535 BUG();
4536 }
1da177e4
LT		 4537 return res;
4538}
4539
faf5f49c 4540struct nfs4_unlockdata {
911d1aaf
TM		 4541 struct nfs_locku_args arg;
4542 struct nfs_locku_res res;
faf5f49c
TM		 4543 struct nfs4_lock_state *lsp;
4544 struct nfs_open_context *ctx;
911d1aaf
TM		 4545 struct file_lock fl;
4546 const struct nfs_server *server;
26e976a8 4547 unsigned long timestamp;
faf5f49c
TM		 4548};
4549
911d1aaf
TM		 4550static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4551 struct nfs_open_context *ctx,
4552 struct nfs4_lock_state *lsp,
4553 struct nfs_seqid *seqid)
4554{
4555 struct nfs4_unlockdata *p;
4556 struct inode *inode = lsp->ls_state->inode;
4557
8535b2be 4558 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4559 if (p == NULL)
4560 return NULL;
4561 p->arg.fh = NFS_FH(inode);
4562 p->arg.fl = &p->fl;
4563 p->arg.seqid = seqid;
c1d51931 4564 p->res.seqid = seqid;
911d1aaf
TM		 4565 p->arg.stateid = &lsp->ls_stateid;
4566 p->lsp = lsp;
4567 atomic_inc(&lsp->ls_count);
4568 /* Ensure we don't close file until we're done freeing locks! */
4569 p->ctx = get_nfs_open_context(ctx);
4570 memcpy(&p->fl, fl, sizeof(p->fl));
4571 p->server = NFS_SERVER(inode);
4572 return p;
4573}
4574
06f814a3 4575static void nfs4_locku_release_calldata(void *data)
faf5f49c 4576{
963d8fe5 4577 struct nfs4_unlockdata *calldata = data;
911d1aaf 4578 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4579 nfs4_put_lock_state(calldata->lsp);
4580 put_nfs_open_context(calldata->ctx);
4581 kfree(calldata);
faf5f49c
TM		 4582}
4583
963d8fe5 4584static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4585{
963d8fe5 4586 struct nfs4_unlockdata *calldata = data;
faf5f49c 4587
14516c3a
TM		 4588 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4589 return;
faf5f49c
TM		 4590 switch (task->tk_status) {
4591 case 0:
f597c537
TM		 4592 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4593 &calldata->res.stateid);
26e976a8 4594 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4595 break;
9e33bed5
TM		 4596 case -NFS4ERR_BAD_STATEID:
4597 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4598 case -NFS4ERR_STALE_STATEID:
4599 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4600 break;
4601 default:
9e33bed5 4602 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4603 rpc_restart_call_prepare(task);
faf5f49c 4604 }
2b1bc308 4605 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4606}
4607
4ce70ada 4608static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4609{
4ce70ada 4610 struct nfs4_unlockdata *calldata = data;
faf5f49c 4611
911d1aaf 4612 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4613 goto out_wait;
795a88c9 4614 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4615 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4616 goto out_no_action;
faf5f49c 4617 }
26e976a8 4618 calldata->timestamp = jiffies;
035168ab 4619 if (nfs4_setup_sequence(calldata->server,
a893693c 4620 &calldata->arg.seq_args,
2240a9e2
TM		 4621 &calldata->res.seq_res,
4622 task) != 0)
4623 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4624 return;
4625out_no_action:
4626 task->tk_action = NULL;
4627out_wait:
4628 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4629}
4630
963d8fe5 4631static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4632 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4633 .rpc_call_done = nfs4_locku_done,
06f814a3 4634 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4635};
4636
a5d16a4d
TM		 4637static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4638 struct nfs_open_context *ctx,
4639 struct nfs4_lock_state *lsp,
4640 struct nfs_seqid *seqid)
4641{
4642 struct nfs4_unlockdata *data;
5138fde0
TM		 4643 struct rpc_message msg = {
4644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4645 .rpc_cred = ctx->cred,
4646 };
c970aa85
TM		 4647 struct rpc_task_setup task_setup_data = {
4648 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4649 .rpc_message = &msg,
c970aa85 4650 .callback_ops = &nfs4_locku_ops,
101070ca 4651 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4652 .flags = RPC_TASK_ASYNC,
4653 };
a5d16a4d 4654
137d6aca
FF		 4655 /* Ensure this is an unlock - when canceling a lock, the
4656 * canceled lock is passed in, and it won't be an unlock.
4657 */
4658 fl->fl_type = F_UNLCK;
4659
a5d16a4d
TM		 4660 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4661 if (data == NULL) {
4662 nfs_free_seqid(seqid);
4663 return ERR_PTR(-ENOMEM);
4664 }
4665
9d12b216 4666 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4667 msg.rpc_argp = &data->arg;
4668 msg.rpc_resp = &data->res;
c970aa85
TM		 4669 task_setup_data.callback_data = data;
4670 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4671}
4672
faf5f49c
TM		 4673static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4674{
65b62a29
TM		 4675 struct inode *inode = state->inode;
4676 struct nfs4_state_owner *sp = state->owner;
4677 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4678 struct nfs_seqid *seqid;
1da177e4 4679 struct nfs4_lock_state *lsp;
06f814a3
TM		 4680 struct rpc_task *task;
4681 int status = 0;
536ff0f8 4682 unsigned char fl_flags = request->fl_flags;
faf5f49c 4683
8d0a8a9d 4684 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4685 /* Unlock _before_ we do the RPC call */
4686 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4687 /* Exclude nfs_delegation_claim_locks() */
4688 mutex_lock(&sp->so_delegreturn_mutex);
4689 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4690 down_read(&nfsi->rwsem);
4691 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4692 up_read(&nfsi->rwsem);
65b62a29 4693 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4694 goto out;
19e03c57
TM		 4695 }
4696 up_read(&nfsi->rwsem);
65b62a29 4697 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4698 if (status != 0)
9b073574
TM		 4699 goto out;
4700 /* Is this a delegated lock? */
4701 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4702 goto out;
8d0a8a9d 4703 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4704 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4705 status = -ENOMEM;
911d1aaf 4706 if (seqid == NULL)
9b073574 4707 goto out;
cd3758e3 4708 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4709 status = PTR_ERR(task);
4710 if (IS_ERR(task))
9b073574 4711 goto out;
a5d16a4d 4712 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4713 rpc_put_task(task);
9b073574 4714out:
536ff0f8 4715 request->fl_flags = fl_flags;
1da177e4
LT		 4716 return status;
4717}
4718
a5d16a4d
TM		 4719struct nfs4_lockdata {
4720 struct nfs_lock_args arg;
4721 struct nfs_lock_res res;
4722 struct nfs4_lock_state *lsp;
4723 struct nfs_open_context *ctx;
4724 struct file_lock fl;
26e976a8 4725 unsigned long timestamp;
a5d16a4d
TM		 4726 int rpc_status;
4727 int cancelled;
66179efe 4728 struct nfs_server *server;
a5d16a4d
TM		 4729};
4730
4731static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4732 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4733 gfp_t gfp_mask)
1da177e4 4734{
a5d16a4d
TM		 4735 struct nfs4_lockdata *p;
4736 struct inode *inode = lsp->ls_state->inode;
1da177e4 4737 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4738
8535b2be 4739 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4740 if (p == NULL)
4741 return NULL;
4742
4743 p->arg.fh = NFS_FH(inode);
4744 p->arg.fl = &p->fl;
8535b2be 4745 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4746 if (p->arg.open_seqid == NULL)
4747 goto out_free;
8535b2be 4748 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4749 if (p->arg.lock_seqid == NULL)
2f74c0a0 4750 goto out_free_seqid;
a5d16a4d 4751 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4752 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4753 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4754 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4755 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4756 p->lsp = lsp;
66179efe 4757 p->server = server;
a5d16a4d
TM		 4758 atomic_inc(&lsp->ls_count);
4759 p->ctx = get_nfs_open_context(ctx);
4760 memcpy(&p->fl, fl, sizeof(p->fl));
4761 return p;
2f74c0a0
TM		 4762out_free_seqid:
4763 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4764out_free:
4765 kfree(p);
4766 return NULL;
4767}
4768
4769static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4770{
4771 struct nfs4_lockdata *data = calldata;
4772 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4773
3110ff80 4774 dprintk("%s: begin!\n", __func__);
2f74c0a0 4775 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4776 goto out_wait;
a5d16a4d
TM		 4777 /* Do we need to do an open_to_lock_owner? */
4778 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4779 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4780 goto out_release_lock_seqid;
8fe72bac 4781 }
a5d16a4d
TM		 4782 data->arg.open_stateid = &state->stateid;
4783 data->arg.new_lock_owner = 1;
c1d51931 4784 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4785 } else
4786 data->arg.new_lock_owner = 0;
5d422301
TM		 4787 if (!nfs4_valid_open_stateid(state)) {
4788 data->rpc_status = -EBADF;
4789 task->tk_action = NULL;
4790 goto out_release_open_seqid;
4791 }
26e976a8 4792 data->timestamp = jiffies;
035168ab
TM		 4793 if (nfs4_setup_sequence(data->server,
4794 &data->arg.seq_args,
2240a9e2 4795 &data->res.seq_res,
d9afbd1b 4796 task) == 0)
66179efe 4797 return;
5d422301 4798out_release_open_seqid:
2240a9e2
TM		 4799 nfs_release_seqid(data->arg.open_seqid);
4800out_release_lock_seqid:
4801 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4802out_wait:
4803 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4804 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4805}
4806
a5d16a4d
TM		 4807static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4808{
4809 struct nfs4_lockdata *data = calldata;
4810
3110ff80 4811 dprintk("%s: begin!\n", __func__);
a5d16a4d 4812
14516c3a
TM		 4813 if (!nfs4_sequence_done(task, &data->res.seq_res))
4814 return;
66179efe 4815
a5d16a4d 4816 data->rpc_status = task->tk_status;
a5d16a4d 4817 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4818 if (data->rpc_status == 0)
4819 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4820 else
4821 goto out;
4822 }
4823 if (data->rpc_status == 0) {
f597c537 4824 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4825 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4826 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4827 }
a5d16a4d 4828out:
3110ff80 4829 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4830}
4831
4832static void nfs4_lock_release(void *calldata)
4833{
4834 struct nfs4_lockdata *data = calldata;
4835
3110ff80 4836 dprintk("%s: begin!\n", __func__);
2f74c0a0 4837 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4838 if (data->cancelled != 0) {
4839 struct rpc_task *task;
4840 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4841 data->arg.lock_seqid);
4842 if (!IS_ERR(task))
bf294b41 4843 rpc_put_task_async(task);
3110ff80 4844 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4845 } else
4846 nfs_free_seqid(data->arg.lock_seqid);
4847 nfs4_put_lock_state(data->lsp);
4848 put_nfs_open_context(data->ctx);
4849 kfree(data);
3110ff80 4850 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4851}
4852
4853static const struct rpc_call_ops nfs4_lock_ops = {
4854 .rpc_call_prepare = nfs4_lock_prepare,
4855 .rpc_call_done = nfs4_lock_done,
4856 .rpc_release = nfs4_lock_release,
4857};
4858
2bee72a6
TM		 4859static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4860{
2bee72a6
TM		 4861 switch (error) {
4862 case -NFS4ERR_ADMIN_REVOKED:
4863 case -NFS4ERR_BAD_STATEID:
ecac799a 4864 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4865 if (new_lock_owner != 0 ||
795a88c9 4866 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4867 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4868 break;
4869 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4870 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4871 case -NFS4ERR_EXPIRED:
4872 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4873 };
4874}
4875
afe6c27c 4876static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4877{
4878 struct nfs4_lockdata *data;
4879 struct rpc_task *task;
5138fde0
TM		 4880 struct rpc_message msg = {
4881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4882 .rpc_cred = state->owner->so_cred,
4883 };
c970aa85
TM		 4884 struct rpc_task_setup task_setup_data = {
4885 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4886 .rpc_message = &msg,
c970aa85 4887 .callback_ops = &nfs4_lock_ops,
101070ca 4888 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4889 .flags = RPC_TASK_ASYNC,
4890 };
a5d16a4d
TM		 4891 int ret;
4892
3110ff80 4893 dprintk("%s: begin!\n", __func__);
cd3758e3 4894 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4895 fl->fl_u.nfs4_fl.owner,
4896 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4897 if (data == NULL)
4898 return -ENOMEM;
4899 if (IS_SETLKW(cmd))
4900 data->arg.block = 1;
9d12b216 4901 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4902 msg.rpc_argp = &data->arg;
4903 msg.rpc_resp = &data->res;
c970aa85 4904 task_setup_data.callback_data = data;
8fe72bac
TM		 4905 if (recovery_type > NFS_LOCK_NEW) {
4906 if (recovery_type == NFS_LOCK_RECLAIM)
4907 data->arg.reclaim = NFS_LOCK_RECLAIM;
4908 nfs4_set_sequence_privileged(&data->arg.seq_args);
4909 }
c970aa85 4910 task = rpc_run_task(&task_setup_data);
7a1218a2 4911 if (IS_ERR(task))
a5d16a4d 4912 return PTR_ERR(task);
a5d16a4d
TM		 4913 ret = nfs4_wait_for_completion_rpc_task(task);
4914 if (ret == 0) {
4915 ret = data->rpc_status;
2bee72a6
TM		 4916 if (ret)
4917 nfs4_handle_setlk_error(data->server, data->lsp,
4918 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4919 } else
4920 data->cancelled = 1;
e6b3c4db 4921 rpc_put_task(task);
3110ff80 4922 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4923 return ret;
1da177e4
LT		 4924}
4925
4926static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4927{
202b50dc 4928 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4929 struct nfs4_exception exception = {
4930 .inode = state->inode,
4931 };
202b50dc
TM		 4932 int err;
4933
4934 do {
42a2d13e
TM		 4935 /* Cache the lock if possible... */
4936 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4937 return 0;
afe6c27c 4938 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4939 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4940 break;
4941 nfs4_handle_exception(server, err, &exception);
4942 } while (exception.retry);
4943 return err;
1da177e4
LT		 4944}
4945
4946static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4947{
202b50dc 4948 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4949 struct nfs4_exception exception = {
4950 .inode = state->inode,
4951 };
202b50dc
TM		 4952 int err;
4953
6bfc93ef
TM		 4954 err = nfs4_set_lock_state(state, request);
4955 if (err != 0)
4956 return err;
202b50dc 4957 do {
42a2d13e
TM		 4958 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4959 return 0;
afe6c27c 4960 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4961 switch (err) {
4962 default:
4963 goto out;
4964 case -NFS4ERR_GRACE:
4965 case -NFS4ERR_DELAY:
4966 nfs4_handle_exception(server, err, &exception);
4967 err = 0;
4968 }
202b50dc 4969 } while (exception.retry);
a9ed2e25 4970out:
202b50dc 4971 return err;
1da177e4
LT		 4972}
4973
f062eb6c 4974#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4975/**
4976 * nfs41_check_expired_locks - possibly free a lock stateid
4977 *
4978 * @state: NFSv4 state for an inode
4979 *
4980 * Returns NFS_OK if recovery for this stateid is now finished.
4981 * Otherwise a negative NFS4ERR value is returned.
4982 */
b01dd1d8 4983static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4984{
eb64cf96 4985 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4986 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4987 struct nfs_server *server = NFS_SERVER(state->inode);
4988
b01dd1d8 4989 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4990 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4991 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4992 if (status != NFS_OK) {
3e60ffdd
CL		 4993 /* Free the stateid unless the server
4994 * informs us the stateid is unrecognized. */
89af2739
CL		 4995 if (status != -NFS4ERR_BAD_STATEID)
4996 nfs41_free_stateid(server,
4997 &lsp->ls_stateid);
795a88c9 4998 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4999 ret = status;
5000 }
5001 }
5002 };
5003
5004 return ret;
5005}
5006
5007static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5008{
5009 int status = NFS_OK;
5010
5011 if (test_bit(LK_STATE_IN_USE, &state->flags))
5012 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5013 if (status != NFS_OK)
5014 status = nfs4_lock_expired(state, request);
5015 return status;
f062eb6c
BS		 5016}
5017#endif
5018
1da177e4
LT		 5019static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5020{
9a99af49 5021 struct nfs4_state_owner *sp = state->owner;
19e03c57 5022 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5023 unsigned char fl_flags = request->fl_flags;
9a99af49 5024 unsigned int seq;
8e469ebd 5025 int status = -ENOLCK;
1da177e4 5026
8e469ebd
TM		 5027 if ((fl_flags & FL_POSIX) &&
5028 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5029 goto out;
6bfc93ef 5030 /* Is this a delegated open? */
6bfc93ef
TM		 5031 status = nfs4_set_lock_state(state, request);
5032 if (status != 0)
5033 goto out;
01c3b861
TM		 5034 request->fl_flags |= FL_ACCESS;
5035 status = do_vfs_lock(request->fl_file, request);
5036 if (status < 0)
5037 goto out;
19e03c57 5038 down_read(&nfsi->rwsem);
01c3b861 5039 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5040 /* Yes: cache locks! */
01c3b861 5041 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5042 request->fl_flags = fl_flags & ~FL_SLEEP;
5043 status = do_vfs_lock(request->fl_file, request);
5044 goto out_unlock;
01c3b861 5045 }
9a99af49
TM		 5046 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5047 up_read(&nfsi->rwsem);
afe6c27c 5048 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5049 if (status != 0)
9a99af49
TM		 5050 goto out;
5051 down_read(&nfsi->rwsem);
5052 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5053 status = -NFS4ERR_DELAY;
01c3b861 5054 goto out_unlock;
9a99af49 5055 }
6bfc93ef 5056 /* Note: we always want to sleep here! */
01c3b861 5057 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5058 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5059 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5060 "manager!\n", __func__);
01c3b861 5061out_unlock:
19e03c57 5062 up_read(&nfsi->rwsem);
01c3b861
TM		 5063out:
5064 request->fl_flags = fl_flags;
1da177e4
LT		 5065 return status;
5066}
5067
5068static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5069{
a1d0b5ee
TM		 5070 struct nfs4_exception exception = {
5071 .state = state,
05ffe24f 5072 .inode = state->inode,
a1d0b5ee 5073 };
1da177e4
LT		 5074 int err;
5075
5076 do {
965b5d67
TM		 5077 err = _nfs4_proc_setlk(state, cmd, request);
5078 if (err == -NFS4ERR_DENIED)
5079 err = -EAGAIN;
1da177e4 5080 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5081 err, &exception);
1da177e4
LT		 5082 } while (exception.retry);
5083 return err;
5084}
5085
5086static int
5087nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5088{
5089 struct nfs_open_context *ctx;
5090 struct nfs4_state *state;
5091 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5092 int status;
5093
5094 /* verify open state */
cd3758e3 5095 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5096 state = ctx->state;
5097
5098 if (request->fl_start < 0 || request->fl_end < 0)
5099 return -EINVAL;
5100
d953126a
TM		 5101 if (IS_GETLK(cmd)) {
5102 if (state != NULL)
5103 return nfs4_proc_getlk(state, F_GETLK, request);
5104 return 0;
5105 }
1da177e4
LT		 5106
5107 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5108 return -EINVAL;
5109
d953126a
TM		 5110 if (request->fl_type == F_UNLCK) {
5111 if (state != NULL)
5112 return nfs4_proc_unlck(state, cmd, request);
5113 return 0;
5114 }
1da177e4 5115
d953126a
TM		 5116 if (state == NULL)
5117 return -ENOLCK;
55725513
TM		 5118 /*
5119 * Don't rely on the VFS having checked the file open mode,
5120 * since it won't do this for flock() locks.
5121 */
f44106e2 5122 switch (request->fl_type) {
55725513
TM		 5123 case F_RDLCK:
5124 if (!(filp->f_mode & FMODE_READ))
5125 return -EBADF;
5126 break;
5127 case F_WRLCK:
5128 if (!(filp->f_mode & FMODE_WRITE))
5129 return -EBADF;
5130 }
5131
1da177e4
LT		 5132 do {
5133 status = nfs4_proc_setlk(state, cmd, request);
5134 if ((status != -EAGAIN) || IS_SETLK(cmd))
5135 break;
5136 timeout = nfs4_set_lock_task_retry(timeout);
5137 status = -ERESTARTSYS;
5138 if (signalled())
5139 break;
5140 } while(status < 0);
1da177e4
LT		 5141 return status;
5142}
5143
888e694c
TM		 5144int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5145{
5146 struct nfs_server *server = NFS_SERVER(state->inode);
5147 struct nfs4_exception exception = { };
5148 int err;
5149
5150 err = nfs4_set_lock_state(state, fl);
5151 if (err != 0)
5152 goto out;
5153 do {
afe6c27c 5154 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 5155 switch (err) {
5156 default:
a030889a
WAA		 5157 printk(KERN_ERR "NFS: %s: unhandled error "
5158 "%d.\n", __func__, err);
d5122201 5159 case 0:
965b5d67 5160 case -ESTALE:
d5122201 5161 goto out;
d5122201 5162 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5163 case -NFS4ERR_STALE_STATEID:
37380e42
TM		 5164 set_bit(NFS_DELEGATED_STATE, &state->flags);
5165 case -NFS4ERR_EXPIRED:
0400a6b0 5166 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 5167 err = -EAGAIN;
0400a6b0 5168 goto out;
74e7bb73
RL		 5169 case -NFS4ERR_BADSESSION:
5170 case -NFS4ERR_BADSLOT:
5171 case -NFS4ERR_BAD_HIGH_SLOT:
5172 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5173 case -NFS4ERR_DEADSESSION:
37380e42 5174 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 5175 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 5176 err = -EAGAIN;
d5122201 5177 goto out;
a1d0b5ee 5178 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5179 case -NFS4ERR_ADMIN_REVOKED:
5180 case -NFS4ERR_BAD_STATEID:
5181 case -NFS4ERR_OPENMODE:
0400a6b0 5182 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5183 err = 0;
5184 goto out;
dbb21c25
TM		 5185 case -NFS4ERR_DELAY:
5186 case -NFS4ERR_GRACE:
5187 set_bit(NFS_DELEGATED_STATE, &state->flags);
5188 ssleep(1);
5189 err = -EAGAIN;
5190 goto out;
965b5d67
TM		 5191 case -ENOMEM:
5192 case -NFS4ERR_DENIED:
5193 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5194 err = 0;
5195 goto out;
d5122201 5196 }
37380e42 5197 set_bit(NFS_DELEGATED_STATE, &state->flags);
888e694c
TM		 5198 err = nfs4_handle_exception(server, err, &exception);
5199 } while (exception.retry);
5200out:
5201 return err;
5202}
6b3b5496 5203
cf470c3e
TM		 5204struct nfs_release_lockowner_data {
5205 struct nfs4_lock_state *lsp;
5ae67c4f 5206 struct nfs_server *server;
cf470c3e
TM		 5207 struct nfs_release_lockowner_args args;
5208};
5209
d3c7b7cc
TM		 5210static void nfs4_release_lockowner_release(void *calldata)
5211{
cf470c3e 5212 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5213 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5214 kfree(calldata);
5215}
5216
17280175 5217static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5218 .rpc_release = nfs4_release_lockowner_release,
5219};
5220
cf470c3e 5221int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5222{
5223 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5224 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5225 struct rpc_message msg = {
5226 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5227 };
5228
5229 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5230 return -EINVAL;
5231 data = kmalloc(sizeof(*data), GFP_NOFS);
5232 if (!data)
5233 return -ENOMEM;
5234 data->lsp = lsp;
5ae67c4f 5235 data->server = server;
cf470c3e
TM		 5236 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5237 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5238 data->args.lock_owner.s_dev = server->s_dev;
5239 msg.rpc_argp = &data->args;
5240 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5241 return 0;
d3c7b7cc
TM		 5242}
5243
aa1870af
BF		 5244#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5245
64c2ce8b
AK		 5246static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5247 const void *buf, size_t buflen,
5248 int flags, int type)
6b3b5496 5249{
64c2ce8b
AK		 5250 if (strcmp(key, "") != 0)
5251 return -EINVAL;
4b580ee3 5252
64c2ce8b 5253 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5254}
5255
64c2ce8b
AK		 5256static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5257 void *buf, size_t buflen, int type)
6b3b5496 5258{
64c2ce8b
AK		 5259 if (strcmp(key, "") != 0)
5260 return -EINVAL;
aa1870af 5261
64c2ce8b 5262 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5263}
5264
64c2ce8b
AK		 5265static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5266 size_t list_len, const char *name,
5267 size_t name_len, int type)
6b3b5496 5268{
64c2ce8b 5269 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5270
096455a2
BF		 5271 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5272 return 0;
64c2ce8b
AK		 5273
5274 if (list && len <= list_len)
5275 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5276 return len;
6b3b5496
BF		 5277}
5278
533eb461
AA		 5279/*
5280 * nfs_fhget will use either the mounted_on_fileid or the fileid
5281 */
69aaaae1
TM		 5282static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5283{
533eb461
AA		 5284 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5285 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5286 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5287 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5288 return;
5289
5290 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5291 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5292 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5293 fattr->nlink = 2;
5294}
5295
f05d147f
BS		 5296static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5297 const struct qstr *name,
5298 struct nfs4_fs_locations *fs_locations,
5299 struct page *page)
683b57b4
TM		 5300{
5301 struct nfs_server *server = NFS_SERVER(dir);
5302 u32 bitmask[2] = {
361e624f 5303 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5304 };
5305 struct nfs4_fs_locations_arg args = {
5306 .dir_fh = NFS_FH(dir),
c228fd3a 5307 .name = name,
683b57b4
TM		 5308 .page = page,
5309 .bitmask = bitmask,
5310 };
22958463
BH		 5311 struct nfs4_fs_locations_res res = {
5312 .fs_locations = fs_locations,
5313 };
683b57b4
TM		 5314 struct rpc_message msg = {
5315 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5316 .rpc_argp = &args,
22958463 5317 .rpc_resp = &res,
683b57b4
TM		 5318 };
5319 int status;
5320
3110ff80 5321 dprintk("%s: start\n", __func__);
533eb461
AA		 5322
5323 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5324 * is not supported */
5325 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5326 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5327 else
5328 bitmask[0] |= FATTR4_WORD0_FILEID;
5329
c228fd3a 5330 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5331 fs_locations->server = server;
830b8e33 5332 fs_locations->nlocations = 0;
f05d147f 5333 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5334 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5335 return status;
5336}
5337
f05d147f
BS		 5338int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5339 const struct qstr *name,
5340 struct nfs4_fs_locations *fs_locations,
5341 struct page *page)
db0a9593
BS		 5342{
5343 struct nfs4_exception exception = { };
5344 int err;
5345 do {
5346 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5347 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5348 &exception);
5349 } while (exception.retry);
5350 return err;
5351}
5352
5a5ea0d4
BS		 5353static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5354{
5355 int status;
5356 struct nfs4_secinfo_arg args = {
5357 .dir_fh = NFS_FH(dir),
5358 .name = name,
5359 };
5360 struct nfs4_secinfo_res res = {
5361 .flavors = flavors,
5362 };
5363 struct rpc_message msg = {
5364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5365 .rpc_argp = &args,
5366 .rpc_resp = &res,
5367 };
5368
5369 dprintk("NFS call secinfo %s\n", name->name);
5370 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5371 dprintk("NFS reply secinfo: %d\n", status);
5372 return status;
5373}
5374
72de53ec
BS		 5375int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5376 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5377{
5378 struct nfs4_exception exception = { };
5379 int err;
5380 do {
5381 err = nfs4_handle_exception(NFS_SERVER(dir),
5382 _nfs4_proc_secinfo(dir, name, flavors),
5383 &exception);
5384 } while (exception.retry);
5385 return err;
5386}
5387
557134a3 5388#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5389/*
5390 * Check the exchange flags returned by the server for invalid flags, having
5391 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5392 * DS flags set.
5393 */
5394static int nfs4_check_cl_exchange_flags(u32 flags)
5395{
5396 if (flags & ~EXCHGID4_FLAG_MASK_R)
5397 goto out_inval;
5398 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5399 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5400 goto out_inval;
5401 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5402 goto out_inval;
5403 return NFS_OK;
5404out_inval:
5405 return -NFS4ERR_INVAL;
5406}
5407
78fe0f41 5408static bool
79d4e1f0
CL		 5409nfs41_same_server_scope(struct nfs41_server_scope *a,
5410 struct nfs41_server_scope *b)
78fe0f41
WAA		 5411{
5412 if (a->server_scope_sz == b->server_scope_sz &&
5413 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5414 return true;
5415
5416 return false;
5417}
5418
7c44f1ae
WAA		 5419/*
5420 * nfs4_proc_bind_conn_to_session()
5421 *
5422 * The 4.1 client currently uses the same TCP connection for the
5423 * fore and backchannel.
5424 */
2cf047c9 5425int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5426{
5427 int status;
5428 struct nfs41_bind_conn_to_session_res res;
5429 struct rpc_message msg = {
5430 .rpc_proc =
5431 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5432 .rpc_argp = clp,
5433 .rpc_resp = &res,
2cf047c9 5434 .rpc_cred = cred,
7c44f1ae
WAA		 5435 };
5436
5437 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5438
5439 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5440 if (unlikely(res.session == NULL)) {
5441 status = -ENOMEM;
5442 goto out;
5443 }
5444
5445 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5446 if (status == 0) {
5447 if (memcmp(res.session->sess_id.data,
5448 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5449 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5450 status = -EIO;
5451 goto out_session;
5452 }
5453 if (res.dir != NFS4_CDFS4_BOTH) {
5454 dprintk("NFS: %s: Unexpected direction from server\n",
5455 __func__);
5456 status = -EIO;
5457 goto out_session;
5458 }
5459 if (res.use_conn_in_rdma_mode) {
5460 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5461 __func__);
5462 status = -EIO;
5463 goto out_session;
5464 }
5465 }
5466out_session:
5467 kfree(res.session);
5468out:
5469 dprintk("<-- %s status= %d\n", __func__, status);
5470 return status;
5471}
5472
99fe60d0
BH		 5473/*
5474 * nfs4_proc_exchange_id()
5475 *
6bbb4ae8
CL		 5476 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5477 *
99fe60d0
BH		 5478 * Since the clientid has expired, all compounds using sessions
5479 * associated with the stale clientid will be returning
5480 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5481 * be in some phase of session reset.
5482 */
4d643d1d 5483int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5484{
5485 nfs4_verifier verifier;
5486 struct nfs41_exchange_id_args args = {
cd93710e 5487 .verifier = &verifier,
99fe60d0 5488 .client = clp,
357f54d6 5489 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5490 };
5491 struct nfs41_exchange_id_res res = {
32b01310 5492 0
99fe60d0
BH		 5493 };
5494 int status;
5495 struct rpc_message msg = {
5496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5497 .rpc_argp = &args,
5498 .rpc_resp = &res,
5499 .rpc_cred = cred,
5500 };
99fe60d0 5501
f092075d 5502 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5503 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5504 sizeof(args.id));
6bbb4ae8
CL		 5505 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5506 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5507 args.id_len, args.id);
99fe60d0 5508
acdeb69d 5509 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5510 GFP_NOFS);
acdeb69d 5511 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5512 status = -ENOMEM;
5513 goto out;
5514 }
78fe0f41 5515
79d4e1f0 5516 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5517 GFP_NOFS);
177313f1 5518 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5519 status = -ENOMEM;
acdeb69d 5520 goto out_server_owner;
abe9a6d5 5521 }
78fe0f41 5522
bbafffd2 5523 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5524 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5525 status = -ENOMEM;
5526 goto out_server_scope;
5527 }
5528
1bd714f2 5529 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5530 if (status == 0)
32b01310 5531 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5532
acdeb69d 5533 if (status == 0) {
32b01310
TM		 5534 clp->cl_clientid = res.clientid;
5535 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5536 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5537 clp->cl_seqid = res.seqid;
5538
acdeb69d
CL		 5539 kfree(clp->cl_serverowner);
5540 clp->cl_serverowner = res.server_owner;
5541 res.server_owner = NULL;
78fe0f41 5542
7d2ed9ac 5543 /* use the most recent implementation id */
59155546
CL		 5544 kfree(clp->cl_implid);
5545 clp->cl_implid = res.impl_id;
7d2ed9ac 5546
177313f1 5547 if (clp->cl_serverscope != NULL &&
79d4e1f0 5548 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5549 res.server_scope)) {
5550 dprintk("%s: server_scope mismatch detected\n",
5551 __func__);
5552 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5553 kfree(clp->cl_serverscope);
5554 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5555 }
5556
177313f1 5557 if (clp->cl_serverscope == NULL) {
79d4e1f0 5558 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5559 goto out;
5560 }
32b01310
TM		 5561 } else
5562 kfree(res.impl_id);
7d2ed9ac 5563
acdeb69d
CL		 5564out_server_owner:
5565 kfree(res.server_owner);
7d2ed9ac 5566out_server_scope:
abe9a6d5
WAA		 5567 kfree(res.server_scope);
5568out:
177313f1 5569 if (clp->cl_implid != NULL)
6bbb4ae8 5570 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5571 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5572 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5573 clp->cl_implid->date.seconds,
5574 clp->cl_implid->date.nseconds);
6bbb4ae8 5575 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5576 return status;
5577}
5578
66245539
TM		 5579static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5580 struct rpc_cred *cred)
5581{
5582 struct rpc_message msg = {
5583 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5584 .rpc_argp = clp,
5585 .rpc_cred = cred,
5586 };
5587 int status;
5588
5589 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5590 if (status)
02c67525 5591 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5592 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5593 return status;
5594}
5595
5596static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5597 struct rpc_cred *cred)
5598{
5599 unsigned int loop;
5600 int ret;
5601
5602 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5603 ret = _nfs4_proc_destroy_clientid(clp, cred);
5604 switch (ret) {
5605 case -NFS4ERR_DELAY:
5606 case -NFS4ERR_CLIENTID_BUSY:
5607 ssleep(1);
5608 break;
5609 default:
5610 return ret;
5611 }
5612 }
5613 return 0;
5614}
5615
5616int nfs4_destroy_clientid(struct nfs_client *clp)
5617{
5618 struct rpc_cred *cred;
5619 int ret = 0;
5620
5621 if (clp->cl_mvops->minor_version < 1)
5622 goto out;
5623 if (clp->cl_exchange_flags == 0)
5624 goto out;
05f4c350
CL		 5625 if (clp->cl_preserve_clid)
5626 goto out;
66245539
TM		 5627 cred = nfs4_get_exchange_id_cred(clp);
5628 ret = nfs4_proc_destroy_clientid(clp, cred);
5629 if (cred)
5630 put_rpccred(cred);
5631 switch (ret) {
5632 case 0:
5633 case -NFS4ERR_STALE_CLIENTID:
5634 clp->cl_exchange_flags = 0;
5635 }
5636out:
5637 return ret;
5638}
5639
2050f0cc
AA		 5640struct nfs4_get_lease_time_data {
5641 struct nfs4_get_lease_time_args *args;
5642 struct nfs4_get_lease_time_res *res;
5643 struct nfs_client *clp;
5644};
5645
5646static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5647 void *calldata)
5648{
2050f0cc
AA		 5649 struct nfs4_get_lease_time_data *data =
5650 (struct nfs4_get_lease_time_data *)calldata;
5651
5652 dprintk("--> %s\n", __func__);
5653 /* just setup sequence, do not trigger session recovery
5654 since we're invoked within one */
d9afbd1b
TM		 5655 nfs41_setup_sequence(data->clp->cl_session,
5656 &data->args->la_seq_args,
5657 &data->res->lr_seq_res,
5658 task);
2050f0cc
AA		 5659 dprintk("<-- %s\n", __func__);
5660}
5661
5662/*
5663 * Called from nfs4_state_manager thread for session setup, so don't recover
5664 * from sequence operation or clientid errors.
5665 */
5666static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5667{
5668 struct nfs4_get_lease_time_data *data =
5669 (struct nfs4_get_lease_time_data *)calldata;
5670
5671 dprintk("--> %s\n", __func__);
14516c3a
TM		 5672 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5673 return;
2050f0cc
AA		 5674 switch (task->tk_status) {
5675 case -NFS4ERR_DELAY:
5676 case -NFS4ERR_GRACE:
5677 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5678 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5679 task->tk_status = 0;
a8a4ae3a
AA		 5680 /* fall through */
5681 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5682 rpc_restart_call_prepare(task);
2050f0cc
AA		 5683 return;
5684 }
2050f0cc
AA		 5685 dprintk("<-- %s\n", __func__);
5686}
5687
17280175 5688static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5689 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5690 .rpc_call_done = nfs4_get_lease_time_done,
5691};
5692
5693int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5694{
5695 struct rpc_task *task;
5696 struct nfs4_get_lease_time_args args;
5697 struct nfs4_get_lease_time_res res = {
5698 .lr_fsinfo = fsinfo,
5699 };
5700 struct nfs4_get_lease_time_data data = {
5701 .args = &args,
5702 .res = &res,
5703 .clp = clp,
5704 };
5705 struct rpc_message msg = {
5706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5707 .rpc_argp = &args,
5708 .rpc_resp = &res,
5709 };
5710 struct rpc_task_setup task_setup = {
5711 .rpc_client = clp->cl_rpcclient,
5712 .rpc_message = &msg,
5713 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5714 .callback_data = &data,
5715 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5716 };
5717 int status;
5718
9d12b216 5719 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5720 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5721 dprintk("--> %s\n", __func__);
5722 task = rpc_run_task(&task_setup);
5723
5724 if (IS_ERR(task))
5725 status = PTR_ERR(task);
5726 else {
5727 status = task->tk_status;
5728 rpc_put_task(task);
5729 }
5730 dprintk("<-- %s return %d\n", __func__, status);
5731
5732 return status;
5733}
5734
fc931582
AA		 5735/*
5736 * Initialize the values to be used by the client in CREATE_SESSION
5737 * If nfs4_init_session set the fore channel request and response sizes,
5738 * use them.
5739 *
5740 * Set the back channel max_resp_sz_cached to zero to force the client to
5741 * always set csa_cachethis to FALSE because the current implementation
5742 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5743 */
5744static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5745{
5746 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5747 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5748 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5749
5750 if (mxrqst_sz == 0)
5751 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5752 if (mxresp_sz == 0)
5753 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5754 /* Fore channel attributes */
fc931582
AA		 5755 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5756 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5757 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5758 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5759
5760 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5761 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5762 __func__,
5763 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5764 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5765
5766 /* Back channel attributes */
fc931582
AA		 5767 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5768 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5769 args->bc_attrs.max_resp_sz_cached = 0;
5770 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5771 args->bc_attrs.max_reqs = 1;
5772
5773 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5774 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5775 __func__,
5776 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5777 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5778 args->bc_attrs.max_reqs);
5779}
5780
43c2e885 5781static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5782{
43c2e885
BF		 5783 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5784 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5785
43c2e885
BF		 5786 if (rcvd->max_resp_sz > sent->max_resp_sz)
5787 return -EINVAL;
5788 /*
5789 * Our requested max_ops is the minimum we need; we're not
5790 * prepared to break up compounds into smaller pieces than that.
5791 * So, no point even trying to continue if the server won't
5792 * cooperate:
5793 */
5794 if (rcvd->max_ops < sent->max_ops)
5795 return -EINVAL;
5796 if (rcvd->max_reqs == 0)
5797 return -EINVAL;
b4b9a0c1
VG		 5798 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5799 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5800 return 0;
8d35301d
AA		 5801}
5802
43c2e885
BF		 5803static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5804{
5805 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5806 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5807
43c2e885
BF		 5808 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5809 return -EINVAL;
5810 if (rcvd->max_resp_sz < sent->max_resp_sz)
5811 return -EINVAL;
5812 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5813 return -EINVAL;
5814 /* These would render the backchannel useless: */
b4b9a0c1 5815 if (rcvd->max_ops != sent->max_ops)
43c2e885 5816 return -EINVAL;
b4b9a0c1 5817 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5818 return -EINVAL;
5819 return 0;
5820}
8d35301d 5821
8d35301d
AA		 5822static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5823 struct nfs4_session *session)
5824{
43c2e885 5825 int ret;
8d35301d 5826
43c2e885
BF		 5827 ret = nfs4_verify_fore_channel_attrs(args, session);
5828 if (ret)
5829 return ret;
5830 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5831}
5832
848f5bda
TM		 5833static int _nfs4_proc_create_session(struct nfs_client *clp,
5834 struct rpc_cred *cred)
fc931582
AA		 5835{
5836 struct nfs4_session *session = clp->cl_session;
5837 struct nfs41_create_session_args args = {
5838 .client = clp,
5839 .cb_program = NFS4_CALLBACK,
5840 };
5841 struct nfs41_create_session_res res = {
5842 .client = clp,
5843 };
5844 struct rpc_message msg = {
5845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5846 .rpc_argp = &args,
5847 .rpc_resp = &res,
848f5bda 5848 .rpc_cred = cred,
fc931582
AA		 5849 };
5850 int status;
5851
5852 nfs4_init_channel_attrs(&args);
0f91421e 5853 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5854
1bd714f2 5855 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5856
43095d39 5857 if (!status) {
8d35301d
AA		 5858 /* Verify the session's negotiated channel_attrs values */
5859 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5860 /* Increment the clientid slot sequence id */
5861 clp->cl_seqid++;
5862 }
5863
5864 return status;
5865}
5866
5867/*
5868 * Issues a CREATE_SESSION operation to the server.
5869 * It is the responsibility of the caller to verify the session is
5870 * expired before calling this routine.
5871 */
848f5bda 5872int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5873{
5874 int status;
5875 unsigned *ptr;
fc931582
AA		 5876 struct nfs4_session *session = clp->cl_session;
5877
5878 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5879
848f5bda 5880 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5881 if (status)
5882 goto out;
5883
aacd5537
AA		 5884 /* Init or reset the session slot tables */
5885 status = nfs4_setup_session_slot_tables(session);
5886 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5887 if (status)
5888 goto out;
5889
5890 ptr = (unsigned *)&session->sess_id.data[0];
5891 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5892 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5893out:
5894 dprintk("<-- %s\n", __func__);
5895 return status;
5896}
5897
0f3e66c6
AA		 5898/*
5899 * Issue the over-the-wire RPC DESTROY_SESSION.
5900 * The caller must serialize access to this routine.
5901 */
848f5bda
TM		 5902int nfs4_proc_destroy_session(struct nfs4_session *session,
5903 struct rpc_cred *cred)
0f3e66c6 5904{
848f5bda
TM		 5905 struct rpc_message msg = {
5906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5907 .rpc_argp = session,
5908 .rpc_cred = cred,
5909 };
0f3e66c6 5910 int status = 0;
0f3e66c6
AA		 5911
5912 dprintk("--> nfs4_proc_destroy_session\n");
5913
5914 /* session is still being setup */
5915 if (session->clp->cl_cons_state != NFS_CS_READY)
5916 return status;
5917
1bd714f2 5918 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5919
5920 if (status)
08106ac7 5921 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5922 "Session has been destroyed regardless...\n", status);
5923
5924 dprintk("<-- nfs4_proc_destroy_session\n");
5925 return status;
5926}
5927
fc01cea9
AA		 5928/*
5929 * Renew the cl_session lease.
5930 */
d5f8d3fe
TM		 5931struct nfs4_sequence_data {
5932 struct nfs_client *clp;
5933 struct nfs4_sequence_args args;
5934 struct nfs4_sequence_res res;
5935};
5936
dc96aef9
AB		 5937static void nfs41_sequence_release(void *data)
5938{
d5f8d3fe
TM		 5939 struct nfs4_sequence_data *calldata = data;
5940 struct nfs_client *clp = calldata->clp;
dc96aef9 5941
7135840f
AB		 5942 if (atomic_read(&clp->cl_count) > 1)
5943 nfs4_schedule_state_renewal(clp);
5944 nfs_put_client(clp);
d5f8d3fe 5945 kfree(calldata);
dc96aef9
AB		 5946}
5947
aa5190d0
TM		 5948static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5949{
5950 switch(task->tk_status) {
5951 case -NFS4ERR_DELAY:
aa5190d0
TM		 5952 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5953 return -EAGAIN;
5954 default:
0400a6b0 5955 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5956 }
5957 return 0;
5958}
5959
dc96aef9 5960static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5961{
d5f8d3fe
TM		 5962 struct nfs4_sequence_data *calldata = data;
5963 struct nfs_client *clp = calldata->clp;
fc01cea9 5964
14516c3a
TM		 5965 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5966 return;
fc01cea9
AA		 5967
5968 if (task->tk_status < 0) {
5969 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5970 if (atomic_read(&clp->cl_count) == 1)
5971 goto out;
fc01cea9 5972
aa5190d0
TM		 5973 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5974 rpc_restart_call_prepare(task);
fc01cea9
AA		 5975 return;
5976 }
5977 }
fc01cea9 5978 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5979out:
fc01cea9
AA		 5980 dprintk("<-- %s\n", __func__);
5981}
5982
5983static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5984{
d5f8d3fe
TM		 5985 struct nfs4_sequence_data *calldata = data;
5986 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5987 struct nfs4_sequence_args *args;
5988 struct nfs4_sequence_res *res;
5989
fc01cea9
AA		 5990 args = task->tk_msg.rpc_argp;
5991 res = task->tk_msg.rpc_resp;
5992
d9afbd1b 5993 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5994}
5995
5996static const struct rpc_call_ops nfs41_sequence_ops = {
5997 .rpc_call_done = nfs41_sequence_call_done,
5998 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5999 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6000};
6001
8fe72bac
TM		 6002static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6003 struct rpc_cred *cred,
6004 bool is_privileged)
fc01cea9 6005{
d5f8d3fe 6006 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6007 struct rpc_message msg = {
6008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6009 .rpc_cred = cred,
6010 };
71ac6da9
TM		 6011 struct rpc_task_setup task_setup_data = {
6012 .rpc_client = clp->cl_rpcclient,
6013 .rpc_message = &msg,
8fe72bac 6014 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 6015 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6016 };
fc01cea9 6017
7135840f 6018 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6019 return ERR_PTR(-EIO);
dfb4f309 6020 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6021 if (calldata == NULL) {
7135840f 6022 nfs_put_client(clp);
71ac6da9 6023 return ERR_PTR(-ENOMEM);
fc01cea9 6024 }
9d12b216 6025 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6026 if (is_privileged)
6027 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6028 msg.rpc_argp = &calldata->args;
6029 msg.rpc_resp = &calldata->res;
6030 calldata->clp = clp;
71ac6da9 6031 task_setup_data.callback_data = calldata;
fc01cea9 6032
71ac6da9
TM		 6033 return rpc_run_task(&task_setup_data);
6034}
6035
2f60ea6b 6036static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6037{
6038 struct rpc_task *task;
6039 int ret = 0;
6040
2f60ea6b
TM		 6041 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6042 return 0;
8fe72bac 6043 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6044 if (IS_ERR(task))
6045 ret = PTR_ERR(task);
6046 else
bf294b41 6047 rpc_put_task_async(task);
71ac6da9
TM		 6048 dprintk("<-- %s status=%d\n", __func__, ret);
6049 return ret;
6050}
6051
6052static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6053{
6054 struct rpc_task *task;
6055 int ret;
6056
8fe72bac 6057 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6058 if (IS_ERR(task)) {
6059 ret = PTR_ERR(task);
6060 goto out;
6061 }
6062 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6063 if (!ret) {
6064 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6065
6066 if (task->tk_status == 0)
6067 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6068 ret = task->tk_status;
b4410c2f 6069 }
71ac6da9
TM		 6070 rpc_put_task(task);
6071out:
6072 dprintk("<-- %s status=%d\n", __func__, ret);
6073 return ret;
fc01cea9
AA		 6074}
6075
fce5c838
RL		 6076struct nfs4_reclaim_complete_data {
6077 struct nfs_client *clp;
6078 struct nfs41_reclaim_complete_args arg;
6079 struct nfs41_reclaim_complete_res res;
6080};
6081
6082static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6083{
6084 struct nfs4_reclaim_complete_data *calldata = data;
6085
d9afbd1b
TM		 6086 nfs41_setup_sequence(calldata->clp->cl_session,
6087 &calldata->arg.seq_args,
6088 &calldata->res.seq_res,
6089 task);
fce5c838
RL		 6090}
6091
aa5190d0
TM		 6092static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6093{
6094 switch(task->tk_status) {
6095 case 0:
6096 case -NFS4ERR_COMPLETE_ALREADY:
6097 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6098 break;
6099 case -NFS4ERR_DELAY:
aa5190d0 6100 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6101 /* fall through */
6102 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6103 return -EAGAIN;
6104 default:
0400a6b0 6105 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6106 }
6107 return 0;
6108}
6109
fce5c838
RL		 6110static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6111{
6112 struct nfs4_reclaim_complete_data *calldata = data;
6113 struct nfs_client *clp = calldata->clp;
6114 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6115
6116 dprintk("--> %s\n", __func__);
14516c3a
TM		 6117 if (!nfs41_sequence_done(task, res))
6118 return;
fce5c838 6119
aa5190d0
TM		 6120 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6121 rpc_restart_call_prepare(task);
6122 return;
6123 }
fce5c838
RL		 6124 dprintk("<-- %s\n", __func__);
6125}
6126
6127static void nfs4_free_reclaim_complete_data(void *data)
6128{
6129 struct nfs4_reclaim_complete_data *calldata = data;
6130
6131 kfree(calldata);
6132}
6133
6134static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6135 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6136 .rpc_call_done = nfs4_reclaim_complete_done,
6137 .rpc_release = nfs4_free_reclaim_complete_data,
6138};
6139
6140/*
6141 * Issue a global reclaim complete.
6142 */
6143static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6144{
6145 struct nfs4_reclaim_complete_data *calldata;
6146 struct rpc_task *task;
6147 struct rpc_message msg = {
6148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6149 };
6150 struct rpc_task_setup task_setup_data = {
6151 .rpc_client = clp->cl_rpcclient,
6152 .rpc_message = &msg,
6153 .callback_ops = &nfs4_reclaim_complete_call_ops,
6154 .flags = RPC_TASK_ASYNC,
6155 };
6156 int status = -ENOMEM;
6157
6158 dprintk("--> %s\n", __func__);
8535b2be 6159 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6160 if (calldata == NULL)
6161 goto out;
6162 calldata->clp = clp;
6163 calldata->arg.one_fs = 0;
fce5c838 6164
9d12b216 6165 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6166 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6167 msg.rpc_argp = &calldata->arg;
6168 msg.rpc_resp = &calldata->res;
6169 task_setup_data.callback_data = calldata;
6170 task = rpc_run_task(&task_setup_data);
acf82b85 6171 if (IS_ERR(task)) {
fce5c838 6172 status = PTR_ERR(task);
acf82b85
DC		 6173 goto out;
6174 }
c34c32ea
AA		 6175 status = nfs4_wait_for_completion_rpc_task(task);
6176 if (status == 0)
6177 status = task->tk_status;
fce5c838 6178 rpc_put_task(task);
acf82b85 6179 return 0;
fce5c838
RL		 6180out:
6181 dprintk("<-- %s status=%d\n", __func__, status);
6182 return status;
6183}
b1f69b75
AA		 6184
6185static void
6186nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6187{
6188 struct nfs4_layoutget *lgp = calldata;
c31663d4 6189 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6190 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6191
6192 dprintk("--> %s\n", __func__);
c31663d4
FI		 6193 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6194 * right now covering the LAYOUTGET we are about to send.
6195 * However, that is not so catastrophic, and there seems
6196 * to be no way to prevent it completely.
6197 */
6ba7db34 6198 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6199 &lgp->res.seq_res, task))
b1f69b75 6200 return;
cf7d63f1
FI		 6201 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6202 NFS_I(lgp->args.inode)->layout,
6203 lgp->args.ctx->state)) {
6204 rpc_exit(task, NFS4_OK);
cf7d63f1 6205 }
b1f69b75
AA		 6206}
6207
6208static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6209{
6210 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6211 struct inode *inode = lgp->args.inode;
6212 struct nfs_server *server = NFS_SERVER(inode);
6213 struct pnfs_layout_hdr *lo;
6214 struct nfs4_state *state = NULL;
30005121 6215 unsigned long timeo, giveup;
b1f69b75
AA		 6216
6217 dprintk("--> %s\n", __func__);
6218
6ba7db34 6219 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6220 goto out;
b1f69b75
AA		 6221
6222 switch (task->tk_status) {
6223 case 0:
ee314c2a 6224 goto out;
b1f69b75
AA		 6225 case -NFS4ERR_LAYOUTTRYLATER:
6226 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6227 timeo = rpc_get_timeout(task->tk_client);
6228 giveup = lgp->args.timestamp + timeo;
6229 if (time_after(giveup, jiffies))
6230 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6231 break;
6232 case -NFS4ERR_EXPIRED:
6233 case -NFS4ERR_BAD_STATEID:
6234 spin_lock(&inode->i_lock);
6235 lo = NFS_I(inode)->layout;
6236 if (!lo || list_empty(&lo->plh_segs)) {
6237 spin_unlock(&inode->i_lock);
6238 /* If the open stateid was bad, then recover it. */
6239 state = lgp->args.ctx->state;
6240 } else {
6241 LIST_HEAD(head);
6242
6243 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6244 spin_unlock(&inode->i_lock);
6245 /* Mark the bad layout state as invalid, then
6246 * retry using the open stateid. */
6247 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6248 }
6249 }
ee314c2a
TM		 6250 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6251 rpc_restart_call_prepare(task);
6252out:
b1f69b75
AA		 6253 dprintk("<-- %s\n", __func__);
6254}
6255
8554116e
IK		 6256static size_t max_response_pages(struct nfs_server *server)
6257{
6258 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6259 return nfs_page_array_len(0, max_resp_sz);
6260}
6261
6262static void nfs4_free_pages(struct page **pages, size_t size)
6263{
6264 int i;
6265
6266 if (!pages)
6267 return;
6268
6269 for (i = 0; i < size; i++) {
6270 if (!pages[i])
6271 break;
6272 __free_page(pages[i]);
6273 }
6274 kfree(pages);
6275}
6276
6277static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6278{
6279 struct page **pages;
6280 int i;
6281
6282 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6283 if (!pages) {
6284 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6285 return NULL;
6286 }
6287
6288 for (i = 0; i < size; i++) {
6289 pages[i] = alloc_page(gfp_flags);
6290 if (!pages[i]) {
6291 dprintk("%s: failed to allocate page\n", __func__);
6292 nfs4_free_pages(pages, size);
6293 return NULL;
6294 }
6295 }
6296
6297 return pages;
6298}
6299
b1f69b75
AA		 6300static void nfs4_layoutget_release(void *calldata)
6301{
6302 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6303 struct inode *inode = lgp->args.inode;
6304 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6305 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6306
6307 dprintk("--> %s\n", __func__);
8554116e 6308 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6309 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6310 put_nfs_open_context(lgp->args.ctx);
6311 kfree(calldata);
6312 dprintk("<-- %s\n", __func__);
6313}
6314
6315static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6316 .rpc_call_prepare = nfs4_layoutget_prepare,
6317 .rpc_call_done = nfs4_layoutget_done,
6318 .rpc_release = nfs4_layoutget_release,
6319};
6320
a0b0a6e3
TM		 6321struct pnfs_layout_segment *
6322nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6323{
a47970ff
WAA		 6324 struct inode *inode = lgp->args.inode;
6325 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6326 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6327 struct rpc_task *task;
6328 struct rpc_message msg = {
6329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6330 .rpc_argp = &lgp->args,
6331 .rpc_resp = &lgp->res,
6332 };
6333 struct rpc_task_setup task_setup_data = {
6334 .rpc_client = server->client,
6335 .rpc_message = &msg,
6336 .callback_ops = &nfs4_layoutget_call_ops,
6337 .callback_data = lgp,
6338 .flags = RPC_TASK_ASYNC,
6339 };
a0b0a6e3 6340 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6341 int status = 0;
6342
6343 dprintk("--> %s\n", __func__);
6344
8554116e
IK		 6345 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6346 if (!lgp->args.layout.pages) {
6347 nfs4_layoutget_release(lgp);
a0b0a6e3 6348 return ERR_PTR(-ENOMEM);
8554116e
IK		 6349 }
6350 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6351 lgp->args.timestamp = jiffies;
8554116e 6352
35124a09 6353 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6354 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6355 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6356
6357 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6358 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6359
b1f69b75
AA		 6360 task = rpc_run_task(&task_setup_data);
6361 if (IS_ERR(task))
a0b0a6e3 6362 return ERR_CAST(task);
b1f69b75 6363 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6364 if (status == 0)
6365 status = task->tk_status;
085b7a45
WAA		 6366 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6367 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6368 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6369 rpc_put_task(task);
6370 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6371 if (status)
6372 return ERR_PTR(status);
6373 return lseg;
b1f69b75
AA		 6374}
6375
cbe82603
BH		 6376static void
6377nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6378{
6379 struct nfs4_layoutreturn *lrp = calldata;
6380
6381 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6382 nfs41_setup_sequence(lrp->clp->cl_session,
6383 &lrp->args.seq_args,
6384 &lrp->res.seq_res,
6385 task);
cbe82603
BH		 6386}
6387
6388static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6389{
6390 struct nfs4_layoutreturn *lrp = calldata;
6391 struct nfs_server *server;
6392
6393 dprintk("--> %s\n", __func__);
6394
6ba7db34 6395 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6396 return;
6397
6398 server = NFS_SERVER(lrp->args.inode);
6399 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6400 rpc_restart_call_prepare(task);
cbe82603
BH		 6401 return;
6402 }
cbe82603
BH		 6403 dprintk("<-- %s\n", __func__);
6404}
6405
6406static void nfs4_layoutreturn_release(void *calldata)
6407{
6408 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6409 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6410
6411 dprintk("--> %s\n", __func__);
849b286f
TM		 6412 spin_lock(&lo->plh_inode->i_lock);
6413 if (lrp->res.lrs_present)
6414 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6415 lo->plh_block_lgets--;
6416 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6417 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6418 kfree(calldata);
6419 dprintk("<-- %s\n", __func__);
6420}
6421
6422static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6423 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6424 .rpc_call_done = nfs4_layoutreturn_done,
6425 .rpc_release = nfs4_layoutreturn_release,
6426};
6427
6428int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6429{
6430 struct rpc_task *task;
6431 struct rpc_message msg = {
6432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6433 .rpc_argp = &lrp->args,
6434 .rpc_resp = &lrp->res,
6435 };
6436 struct rpc_task_setup task_setup_data = {
6437 .rpc_client = lrp->clp->cl_rpcclient,
6438 .rpc_message = &msg,
6439 .callback_ops = &nfs4_layoutreturn_call_ops,
6440 .callback_data = lrp,
6441 };
6442 int status;
6443
6444 dprintk("--> %s\n", __func__);
9d12b216 6445 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6446 task = rpc_run_task(&task_setup_data);
6447 if (IS_ERR(task))
6448 return PTR_ERR(task);
6449 status = task->tk_status;
6450 dprintk("<-- %s status=%d\n", __func__, status);
6451 rpc_put_task(task);
6452 return status;
6453}
6454
7f11d8d3
AA		 6455/*
6456 * Retrieve the list of Data Server devices from the MDS.
6457 */
6458static int _nfs4_getdevicelist(struct nfs_server *server,
6459 const struct nfs_fh *fh,
6460 struct pnfs_devicelist *devlist)
6461{
6462 struct nfs4_getdevicelist_args args = {
6463 .fh = fh,
6464 .layoutclass = server->pnfs_curr_ld->id,
6465 };
6466 struct nfs4_getdevicelist_res res = {
6467 .devlist = devlist,
6468 };
6469 struct rpc_message msg = {
6470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6471 .rpc_argp = &args,
6472 .rpc_resp = &res,
6473 };
6474 int status;
6475
6476 dprintk("--> %s\n", __func__);
6477 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6478 &res.seq_res, 0);
6479 dprintk("<-- %s status=%d\n", __func__, status);
6480 return status;
6481}
6482
6483int nfs4_proc_getdevicelist(struct nfs_server *server,
6484 const struct nfs_fh *fh,
6485 struct pnfs_devicelist *devlist)
6486{
6487 struct nfs4_exception exception = { };
6488 int err;
6489
6490 do {
6491 err = nfs4_handle_exception(server,
6492 _nfs4_getdevicelist(server, fh, devlist),
6493 &exception);
6494 } while (exception.retry);
6495
6496 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6497 err, devlist->num_devs);
6498
6499 return err;
6500}
6501EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6502
b1f69b75
AA		 6503static int
6504_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6505{
6506 struct nfs4_getdeviceinfo_args args = {
6507 .pdev = pdev,
6508 };
6509 struct nfs4_getdeviceinfo_res res = {
6510 .pdev = pdev,
6511 };
6512 struct rpc_message msg = {
6513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6514 .rpc_argp = &args,
6515 .rpc_resp = &res,
6516 };
6517 int status;
6518
6519 dprintk("--> %s\n", __func__);
7c513058 6520 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6521 dprintk("<-- %s status=%d\n", __func__, status);
6522
6523 return status;
6524}
6525
6526int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6527{
6528 struct nfs4_exception exception = { };
6529 int err;
6530
6531 do {
6532 err = nfs4_handle_exception(server,
6533 _nfs4_proc_getdeviceinfo(server, pdev),
6534 &exception);
6535 } while (exception.retry);
6536 return err;
6537}
6538EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6539
863a3c6c
AA		 6540static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6541{
6542 struct nfs4_layoutcommit_data *data = calldata;
6543 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6544 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6545
d9afbd1b
TM		 6546 nfs41_setup_sequence(session,
6547 &data->args.seq_args,
6548 &data->res.seq_res,
6549 task);
863a3c6c
AA		 6550}
6551
6552static void
6553nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6554{
6555 struct nfs4_layoutcommit_data *data = calldata;
6556 struct nfs_server *server = NFS_SERVER(data->args.inode);
6557
6ba7db34 6558 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6559 return;
6560
6561 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6562 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6563 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6564 case -NFS4ERR_BADLAYOUT: /* no layout */
6565 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6566 task->tk_status = 0;
e59d27e0
TM		 6567 break;
6568 case 0:
863a3c6c
AA		 6569 nfs_post_op_update_inode_force_wcc(data->args.inode,
6570 data->res.fattr);
e59d27e0
TM		 6571 break;
6572 default:
6573 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6574 rpc_restart_call_prepare(task);
6575 return;
6576 }
6577 }
863a3c6c
AA		 6578}
6579
6580static void nfs4_layoutcommit_release(void *calldata)
6581{
6582 struct nfs4_layoutcommit_data *data = calldata;
6583
db29c089 6584 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6585 put_rpccred(data->cred);
6586 kfree(data);
6587}
6588
6589static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6590 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6591 .rpc_call_done = nfs4_layoutcommit_done,
6592 .rpc_release = nfs4_layoutcommit_release,
6593};
6594
6595int
ef311537 6596nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6597{
6598 struct rpc_message msg = {
6599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6600 .rpc_argp = &data->args,
6601 .rpc_resp = &data->res,
6602 .rpc_cred = data->cred,
6603 };
6604 struct rpc_task_setup task_setup_data = {
6605 .task = &data->task,
6606 .rpc_client = NFS_CLIENT(data->args.inode),
6607 .rpc_message = &msg,
6608 .callback_ops = &nfs4_layoutcommit_ops,
6609 .callback_data = data,
6610 .flags = RPC_TASK_ASYNC,
6611 };
6612 struct rpc_task *task;
6613 int status = 0;
6614
6615 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6616 "lbw: %llu inode %lu\n",
6617 data->task.tk_pid, sync,
6618 data->args.lastbytewritten,
6619 data->args.inode->i_ino);
6620
9d12b216 6621 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6622 task = rpc_run_task(&task_setup_data);
6623 if (IS_ERR(task))
6624 return PTR_ERR(task);
ef311537 6625 if (sync == false)
863a3c6c
AA		 6626 goto out;
6627 status = nfs4_wait_for_completion_rpc_task(task);
6628 if (status != 0)
6629 goto out;
6630 status = task->tk_status;
6631out:
6632 dprintk("%s: status %d\n", __func__, status);
6633 rpc_put_task(task);
6634 return status;
6635}
fca78d6d
BS		 6636
6637static int
6638_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6639 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6640{
6641 struct nfs41_secinfo_no_name_args args = {
6642 .style = SECINFO_STYLE_CURRENT_FH,
6643 };
6644 struct nfs4_secinfo_res res = {
6645 .flavors = flavors,
6646 };
6647 struct rpc_message msg = {
6648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6649 .rpc_argp = &args,
6650 .rpc_resp = &res,
6651 };
6652 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6653}
6654
6655static int
6656nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6657 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6658{
6659 struct nfs4_exception exception = { };
6660 int err;
6661 do {
6662 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6663 switch (err) {
6664 case 0:
6665 case -NFS4ERR_WRONGSEC:
6666 case -NFS4ERR_NOTSUPP:
05e9cfb4 6667 goto out;
fca78d6d
BS		 6668 default:
6669 err = nfs4_handle_exception(server, err, &exception);
6670 }
6671 } while (exception.retry);
05e9cfb4 6672out:
fca78d6d
BS		 6673 return err;
6674}
6675
6676static int
6677nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6678 struct nfs_fsinfo *info)
6679{
6680 int err;
6681 struct page *page;
6682 rpc_authflavor_t flavor;
6683 struct nfs4_secinfo_flavors *flavors;
6684
6685 page = alloc_page(GFP_KERNEL);
6686 if (!page) {
6687 err = -ENOMEM;
6688 goto out;
6689 }
6690
6691 flavors = page_address(page);
6692 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6693
6694 /*
6695 * Fall back on "guess and check" method if
6696 * the server doesn't support SECINFO_NO_NAME
6697 */
6698 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6699 err = nfs4_find_root_sec(server, fhandle, info);
6700 goto out_freepage;
6701 }
6702 if (err)
6703 goto out_freepage;
6704
6705 flavor = nfs_find_best_sec(flavors);
6706 if (err == 0)
6707 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6708
6709out_freepage:
6710 put_page(page);
6711 if (err == -EACCES)
6712 return -EPERM;
6713out:
6714 return err;
6715}
1cab0652
BS		 6716
6717static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6718{
6719 int status;
6720 struct nfs41_test_stateid_args args = {
1cab0652 6721 .stateid = stateid,
7d974794
BS		 6722 };
6723 struct nfs41_test_stateid_res res;
6724 struct rpc_message msg = {
6725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6726 .rpc_argp = &args,
6727 .rpc_resp = &res,
6728 };
1cab0652 6729
38527b15 6730 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6731 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6732 nfs4_set_sequence_privileged(&args.seq_args);
6733 status = nfs4_call_sync_sequence(server->client, server, &msg,
6734 &args.seq_args, &res.seq_res);
38527b15
CL		 6735 if (status != NFS_OK) {
6736 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6737 return status;
38527b15
CL		 6738 }
6739 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6740 return -res.status;
7d974794
BS		 6741}
6742
38527b15
CL		 6743/**
6744 * nfs41_test_stateid - perform a TEST_STATEID operation
6745 *
6746 * @server: server / transport on which to perform the operation
6747 * @stateid: state ID to test
6748 *
6749 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6750 * Otherwise a negative NFS4ERR value is returned if the operation
6751 * failed or the state ID is not currently valid.
6752 */
1cab0652 6753static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6754{
6755 struct nfs4_exception exception = { };
6756 int err;
6757 do {
377e507d
CL		 6758 err = _nfs41_test_stateid(server, stateid);
6759 if (err != -NFS4ERR_DELAY)
6760 break;
6761 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6762 } while (exception.retry);
6763 return err;
6764}
9aeda35f 6765
1cab0652 6766static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6767{
9aeda35f 6768 struct nfs41_free_stateid_args args = {
1cab0652 6769 .stateid = stateid,
9aeda35f
BS		 6770 };
6771 struct nfs41_free_stateid_res res;
6772 struct rpc_message msg = {
6773 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6774 .rpc_argp = &args,
6775 .rpc_resp = &res,
6776 };
38527b15 6777 int status;
9aeda35f 6778
38527b15 6779 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6780 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6781 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6782 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6783 &args.seq_args, &res.seq_res);
38527b15
CL		 6784 dprintk("NFS reply free_stateid: %d\n", status);
6785 return status;
9aeda35f
BS		 6786}
6787
38527b15
CL		 6788/**
6789 * nfs41_free_stateid - perform a FREE_STATEID operation
6790 *
6791 * @server: server / transport on which to perform the operation
6792 * @stateid: state ID to release
6793 *
6794 * Returns NFS_OK if the server freed "stateid". Otherwise a
6795 * negative NFS4ERR value is returned.
6796 */
1cab0652 6797static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6798{
6799 struct nfs4_exception exception = { };
6800 int err;
6801 do {
377e507d
CL		 6802 err = _nfs4_free_stateid(server, stateid);
6803 if (err != -NFS4ERR_DELAY)
6804 break;
6805 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6806 } while (exception.retry);
6807 return err;
6808}
36281caa
TM		 6809
6810static bool nfs41_match_stateid(const nfs4_stateid *s1,
6811 const nfs4_stateid *s2)
6812{
2d2f24ad 6813 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6814 return false;
6815
2d2f24ad 6816 if (s1->seqid == s2->seqid)
36281caa 6817 return true;
2d2f24ad 6818 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6819 return true;
6820
6821 return false;
6822}
6823
557134a3
AA		 6824#endif /* CONFIG_NFS_V4_1 */
6825
36281caa
TM		 6826static bool nfs4_match_stateid(const nfs4_stateid *s1,
6827 const nfs4_stateid *s2)
6828{
f597c537 6829 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6830}
6831
6832
17280175 6833static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6834 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6835 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6836 .recover_open = nfs4_open_reclaim,
6837 .recover_lock = nfs4_lock_reclaim,
591d71cb 6838 .establish_clid = nfs4_init_clientid,
90a16617 6839 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6840 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6841};
6842
591d71cb 6843#if defined(CONFIG_NFS_V4_1)
17280175 6844static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6845 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6846 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6847 .recover_open = nfs4_open_reclaim,
6848 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6849 .establish_clid = nfs41_init_clientid,
b4b82607 6850 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6851 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6852 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6853};
6854#endif /* CONFIG_NFS_V4_1 */
6855
17280175 6856static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6857 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6858 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6859 .recover_open = nfs4_open_expired,
6860 .recover_lock = nfs4_lock_expired,
6861 .establish_clid = nfs4_init_clientid,
90a16617 6862 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6863};
6864
6865#if defined(CONFIG_NFS_V4_1)
17280175 6866static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6867 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6868 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6869 .recover_open = nfs41_open_expired,
6870 .recover_lock = nfs41_lock_expired,
4d643d1d 6871 .establish_clid = nfs41_init_clientid,
b4b82607 6872 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6873};
591d71cb 6874#endif /* CONFIG_NFS_V4_1 */
1da177e4 6875
17280175 6876static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6877 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6878 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6879 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6880};
6881
6882#if defined(CONFIG_NFS_V4_1)
17280175 6883static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6884 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6885 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6886 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6887};
6888#endif
6889
97dc1359
TM		 6890static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6891 .minor_version = 0,
39c6daae
TM		 6892 .init_caps = NFS_CAP_READDIRPLUS
6893 | NFS_CAP_ATOMIC_OPEN
6894 | NFS_CAP_CHANGE_ATTR
6895 | NFS_CAP_POSIX_LOCK,
97dc1359 6896 .call_sync = _nfs4_call_sync,
36281caa 6897 .match_stateid = nfs4_match_stateid,
fca78d6d 6898 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6899 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6900 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6901 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6902};
6903
6904#if defined(CONFIG_NFS_V4_1)
6905static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6906 .minor_version = 1,
39c6daae
TM		 6907 .init_caps = NFS_CAP_READDIRPLUS
6908 | NFS_CAP_ATOMIC_OPEN
6909 | NFS_CAP_CHANGE_ATTR
3b66486c 6910 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 6911 | NFS_CAP_STATEID_NFSV41
6912 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 6913 .call_sync = nfs4_call_sync_sequence,
36281caa 6914 .match_stateid = nfs41_match_stateid,
fca78d6d 6915 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6916 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6917 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6918 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6919};
6920#endif
6921
97dc1359
TM		 6922const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6923 [0] = &nfs_v4_0_minor_ops,
6924#if defined(CONFIG_NFS_V4_1)
6925 [1] = &nfs_v4_1_minor_ops,
6926#endif
6927};
6928
73a79706
BS		 6929const struct inode_operations nfs4_dir_inode_operations = {
6930 .create = nfs_create,
6931 .lookup = nfs_lookup,
6932 .atomic_open = nfs_atomic_open,
6933 .link = nfs_link,
6934 .unlink = nfs_unlink,
6935 .symlink = nfs_symlink,
6936 .mkdir = nfs_mkdir,
6937 .rmdir = nfs_rmdir,
6938 .mknod = nfs_mknod,
6939 .rename = nfs_rename,
6940 .permission = nfs_permission,
6941 .getattr = nfs_getattr,
6942 .setattr = nfs_setattr,
6943 .getxattr = generic_getxattr,
6944 .setxattr = generic_setxattr,
6945 .listxattr = generic_listxattr,
6946 .removexattr = generic_removexattr,
6947};
6948
92e1d5be 6949static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6950 .permission = nfs_permission,
6951 .getattr = nfs_getattr,
6952 .setattr = nfs_setattr,
64c2ce8b
AK		 6953 .getxattr = generic_getxattr,
6954 .setxattr = generic_setxattr,
6955 .listxattr = generic_listxattr,
6956 .removexattr = generic_removexattr,
6b3b5496
BF		 6957};
6958
509de811 6959const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6960 .version = 4, /* protocol version */
6961 .dentry_ops = &nfs4_dentry_operations,
6962 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6963 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6964 .file_ops = &nfs4_file_operations,
1da177e4 6965 .getroot = nfs4_proc_get_root,
281cad46 6966 .submount = nfs4_submount,
ff9099f2 6967 .try_mount = nfs4_try_mount,
1da177e4
LT		 6968 .getattr = nfs4_proc_getattr,
6969 .setattr = nfs4_proc_setattr,
6970 .lookup = nfs4_proc_lookup,
6971 .access = nfs4_proc_access,
6972 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6973 .create = nfs4_proc_create,
6974 .remove = nfs4_proc_remove,
6975 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6976 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6977 .unlink_done = nfs4_proc_unlink_done,
6978 .rename = nfs4_proc_rename,
d3d4152a 6979 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6980 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6981 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6982 .link = nfs4_proc_link,
6983 .symlink = nfs4_proc_symlink,
6984 .mkdir = nfs4_proc_mkdir,
6985 .rmdir = nfs4_proc_remove,
6986 .readdir = nfs4_proc_readdir,
6987 .mknod = nfs4_proc_mknod,
6988 .statfs = nfs4_proc_statfs,
6989 .fsinfo = nfs4_proc_fsinfo,
6990 .pathconf = nfs4_proc_pathconf,
e9326dca 6991 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6992 .decode_dirent = nfs4_decode_dirent,
6993 .read_setup = nfs4_proc_read_setup,
1abb5088 6994 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6995 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6996 .read_done = nfs4_read_done,
1da177e4 6997 .write_setup = nfs4_proc_write_setup,
57208fa7 6998 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6999 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7000 .write_done = nfs4_write_done,
1da177e4 7001 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7002 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7003 .commit_done = nfs4_commit_done,
1da177e4 7004 .lock = nfs4_proc_lock,
e50a1c2e 7005 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7006 .close_context = nfs4_close_context,
2b484297 7007 .open_context = nfs4_atomic_open,
011e2a7f 7008 .have_delegation = nfs4_have_delegation,
57ec14c5 7009 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7010 .alloc_client = nfs4_alloc_client,
45a52a02 7011 .init_client = nfs4_init_client,
cdb7eced 7012 .free_client = nfs4_free_client,
1179acc6
BS		 7013 .create_server = nfs4_create_server,
7014 .clone_server = nfs_clone_server,
1da177e4
LT		 7015};
7016
64c2ce8b
AK		 7017static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7018 .prefix = XATTR_NAME_NFSV4_ACL,
7019 .list = nfs4_xattr_list_nfs4_acl,
7020 .get = nfs4_xattr_get_nfs4_acl,
7021 .set = nfs4_xattr_set_nfs4_acl,
7022};
7023
7024const struct xattr_handler *nfs4_xattr_handlers[] = {
7025 &nfs4_xattr_nfs4_acl_handler,
7026 NULL
7027};
7028
1da177e4
LT		 7029/*
7030 * Local variables:
7031 * c-basic-offset: 8
7032 * End:
7033 */
Linux 6.x block layer and io_uring tree(s)