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NFSv4: Introduce new label structure
[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:
b570a975
TM		 307 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
308 nfs_remove_bad_delegation(inode);
309 exception->retry = 1;
310 break;
311 }
9e33bed5
TM		 312 if (state == NULL)
313 break;
5d422301
TM		 314 ret = nfs4_schedule_stateid_recovery(server, state);
315 if (ret < 0)
316 break;
0400a6b0 317 goto wait_on_recovery;
0ced63d1 318 case -NFS4ERR_EXPIRED:
5d422301
TM		 319 if (state != NULL) {
320 ret = nfs4_schedule_stateid_recovery(server, state);
321 if (ret < 0)
322 break;
323 }
65de872e 324 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 325 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 326 nfs4_schedule_lease_recovery(clp);
327 goto wait_on_recovery;
03391693 328#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 329 case -NFS4ERR_BADSESSION:
330 case -NFS4ERR_BADSLOT:
331 case -NFS4ERR_BAD_HIGH_SLOT:
332 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
333 case -NFS4ERR_DEADSESSION:
334 case -NFS4ERR_SEQ_FALSE_RETRY:
335 case -NFS4ERR_SEQ_MISORDERED:
336 dprintk("%s ERROR: %d Reset session\n", __func__,
337 errorcode);
9f594791 338 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 339 goto wait_on_recovery;
03391693 340#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 341 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 342 if (exception->timeout > HZ) {
343 /* We have retried a decent amount, time to
344 * fail
345 */
346 ret = -EBUSY;
347 break;
348 }
65de872e
TM		 349 case -NFS4ERR_GRACE:
350 case -NFS4ERR_DELAY:
351 ret = nfs4_delay(server->client, &exception->timeout);
352 if (ret != 0)
353 break;
a8a4ae3a 354 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 355 case -NFS4ERR_OLD_STATEID:
356 exception->retry = 1;
b064eca2
TM		 357 break;
358 case -NFS4ERR_BADOWNER:
359 /* The following works around a Linux server bug! */
360 case -NFS4ERR_BADNAME:
361 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
362 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
363 exception->retry = 1;
364 printk(KERN_WARNING "NFS: v4 server %s "
365 "does not accept raw "
366 "uid/gids. "
367 "Reenabling the idmapper.\n",
368 server->nfs_client->cl_hostname);
369 }
65de872e
TM		 370 }
371 /* We failed to handle the error */
372 return nfs4_map_errors(ret);
0400a6b0 373wait_on_recovery:
a2c0b9e2
TM		 374 ret = nfs4_wait_clnt_recover(clp);
375 if (ret == 0)
376 exception->retry = 1;
377 return ret;
65de872e
TM		 378}
379
380
452e9352 381static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 382{
1da177e4
LT		 383 spin_lock(&clp->cl_lock);
384 if (time_before(clp->cl_last_renewal,timestamp))
385 clp->cl_last_renewal = timestamp;
386 spin_unlock(&clp->cl_lock);
387}
388
452e9352
TM		 389static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
390{
391 do_renew_lease(server->nfs_client, timestamp);
392}
393
cccef3b9
AA		 394#if defined(CONFIG_NFS_V4_1)
395
d185a334 396static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 397{
e3725ec0 398 struct nfs4_session *session;
13615871 399 struct nfs4_slot_table *tbl;
c10e4498 400 bool send_new_highest_used_slotid = false;
13615871 401
dfb4f309 402 if (!res->sr_slot) {
13615871
AA		 403 /* just wake up the next guy waiting since
404 * we may have not consumed a slot after all */
691daf3b 405 dprintk("%s: No slot\n", __func__);
35dc1d74 406 return;
13615871 407 }
e3725ec0
TM		 408 tbl = res->sr_slot->table;
409 session = tbl->session;
ea028ac9 410
35dc1d74 411 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 412 /* Be nice to the server: try to ensure that the last transmitted
413 * value for highest_user_slotid <= target_highest_slotid
414 */
415 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
416 send_new_highest_used_slotid = true;
417
b75ad4cd
TM		 418 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
419 send_new_highest_used_slotid = false;
420 goto out_unlock;
421 }
f4af6e2a 422 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 423
424 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
425 send_new_highest_used_slotid = false;
b75ad4cd 426out_unlock:
35dc1d74 427 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 428 res->sr_slot = NULL;
c10e4498
TM		 429 if (send_new_highest_used_slotid)
430 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 431}
432
14516c3a 433static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 434{
e3725ec0 435 struct nfs4_session *session;
933602e3 436 struct nfs4_slot *slot;
14516c3a 437 struct nfs_client *clp;
ac20d163 438 bool interrupted = false;
85563073 439 int ret = 1;
b0df806c 440
468f8613
BS		 441 /* don't increment the sequence number if the task wasn't sent */
442 if (!RPC_WAS_SENT(task))
b0df806c
AA		 443 goto out;
444
933602e3 445 slot = res->sr_slot;
e3725ec0 446 session = slot->table->session;
933602e3 447
ac20d163
TM		 448 if (slot->interrupted) {
449 slot->interrupted = 0;
450 interrupted = true;
451 }
452
691daf3b 453 /* Check the SEQUENCE operation status */
14516c3a
TM		 454 switch (res->sr_status) {
455 case 0:
b0df806c 456 /* Update the slot's sequence and clientid lease timer */
933602e3 457 ++slot->seq_nr;
e3725ec0 458 clp = session->clp;
8e63b6a8 459 do_renew_lease(clp, res->sr_timestamp);
0629e370 460 /* Check sequence flags */
b4410c2f
TM		 461 if (res->sr_status_flags != 0)
462 nfs4_schedule_lease_recovery(clp);
464ee9f9 463 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 464 break;
ac20d163
TM		 465 case 1:
466 /*
467 * sr_status remains 1 if an RPC level error occurred.
468 * The server may or may not have processed the sequence
469 * operation..
470 * Mark the slot as having hosted an interrupted RPC call.
471 */
472 slot->interrupted = 1;
473 goto out;
14516c3a
TM		 474 case -NFS4ERR_DELAY:
475 /* The server detected a resend of the RPC call and
476 * returned NFS4ERR_DELAY as per Section 2.10.6.2
477 * of RFC5661.
478 */
df2fabff 479 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 480 __func__,
df2fabff 481 slot->slot_nr,
933602e3 482 slot->seq_nr);
14516c3a 483 goto out_retry;
85563073
TM		 484 case -NFS4ERR_BADSLOT:
485 /*
486 * The slot id we used was probably retired. Try again
487 * using a different slot id.
488 */
e8794440
TM		 489 goto retry_nowait;
490 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 491 /*
492 * Was the last operation on this sequence interrupted?
493 * If so, retry after bumping the sequence number.
494 */
495 if (interrupted) {
496 ++slot->seq_nr;
497 goto retry_nowait;
498 }
e8794440
TM		 499 /*
500 * Could this slot have been previously retired?
501 * If so, then the server may be expecting seq_nr = 1!
502 */
8e63b6a8
TM		 503 if (slot->seq_nr != 1) {
504 slot->seq_nr = 1;
505 goto retry_nowait;
506 }
507 break;
e8794440
TM		 508 case -NFS4ERR_SEQ_FALSE_RETRY:
509 ++slot->seq_nr;
510 goto retry_nowait;
14516c3a
TM		 511 default:
512 /* Just update the slot sequence no. */
933602e3 513 ++slot->seq_nr;
b0df806c
AA		 514 }
515out:
516 /* The session may be reset by one of the error handlers. */
517 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 518 nfs41_sequence_free_slot(res);
85563073 519 return ret;
e8794440
TM		 520retry_nowait:
521 if (rpc_restart_call_prepare(task)) {
522 task->tk_status = 0;
523 ret = 0;
524 }
525 goto out;
14516c3a 526out_retry:
d05dd4e9 527 if (!rpc_restart_call(task))
14516c3a
TM		 528 goto out;
529 rpc_delay(task, NFS4_POLL_RETRY_MAX);
530 return 0;
b0df806c
AA		 531}
532
14516c3a
TM		 533static int nfs4_sequence_done(struct rpc_task *task,
534 struct nfs4_sequence_res *res)
df896455 535{
e3725ec0 536 if (res->sr_slot == NULL)
14516c3a
TM		 537 return 1;
538 return nfs41_sequence_done(task, res);
df896455
TM		 539}
540
9d12b216
TM		 541static void nfs41_init_sequence(struct nfs4_sequence_args *args,
542 struct nfs4_sequence_res *res, int cache_reply)
543{
2b2fa717 544 args->sa_slot = NULL;
9d12b216 545 args->sa_cache_this = 0;
8fe72bac 546 args->sa_privileged = 0;
9d12b216
TM		 547 if (cache_reply)
548 args->sa_cache_this = 1;
9d12b216
TM		 549 res->sr_slot = NULL;
550}
551
8fe72bac
TM		 552static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
553{
554 args->sa_privileged = 1;
555}
556
dc70d7b3 557int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 558 struct nfs4_sequence_args *args,
559 struct nfs4_sequence_res *res,
ce5039c1
AA		 560 struct rpc_task *task)
561{
fbcd4abc
AA		 562 struct nfs4_slot *slot;
563 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 564
565 dprintk("--> %s\n", __func__);
ce5039c1 566 /* slot already allocated? */
dfb4f309 567 if (res->sr_slot != NULL)
d9afbd1b 568 goto out_success;
ce5039c1 569
fbcd4abc
AA		 570 tbl = &session->fc_slot_table;
571
69d206b5
TM		 572 task->tk_timeout = 0;
573
fbcd4abc 574 spin_lock(&tbl->slot_tbl_lock);
a2118c33 575 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 576 !args->sa_privileged) {
0b1c8fc4 577 /* The state manager will wait until the slot table is empty */
0b1c8fc4 578 dprintk("%s session is draining\n", __func__);
7b939a3f 579 goto out_sleep;
689cf5c1
AB		 580 }
581
2dc03b7f 582 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 583 if (IS_ERR(slot)) {
584 /* If out of memory, try again in 1/4 second */
585 if (slot == ERR_PTR(-ENOMEM))
586 task->tk_timeout = HZ >> 2;
fbcd4abc 587 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 588 goto out_sleep;
fbcd4abc
AA		 589 }
590 spin_unlock(&tbl->slot_tbl_lock);
591
2b2fa717 592 args->sa_slot = slot;
fbcd4abc 593
2dc03b7f
TM		 594 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
595 slot->slot_nr, slot->seq_nr);
fbcd4abc 596
dfb4f309 597 res->sr_slot = slot;
8e63b6a8 598 res->sr_timestamp = jiffies;
2a6e26cd 599 res->sr_status_flags = 0;
fbcd4abc
AA		 600 /*
601 * sr_status is only set in decode_sequence, and so will remain
602 * set to 1 if an rpc level failure occurs.
603 */
604 res->sr_status = 1;
d9afbd1b
TM		 605out_success:
606 rpc_call_start(task);
ce5039c1 607 return 0;
7b939a3f 608out_sleep:
8fe72bac
TM		 609 /* Privileged tasks are queued with top priority */
610 if (args->sa_privileged)
1e1093c7
TM		 611 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
612 NULL, RPC_PRIORITY_PRIVILEGED);
613 else
614 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 615 spin_unlock(&tbl->slot_tbl_lock);
616 return -EAGAIN;
ce5039c1 617}
dc70d7b3 618EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 619
035168ab 620int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 621 struct nfs4_sequence_args *args,
622 struct nfs4_sequence_res *res,
ce5039c1
AA		 623 struct rpc_task *task)
624{
035168ab 625 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 626 int ret = 0;
627
d9afbd1b
TM		 628 if (session == NULL) {
629 rpc_call_start(task);
035168ab 630 goto out;
d9afbd1b 631 }
035168ab 632
df2fabff 633 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 634 __func__, session->clp, session, res->sr_slot ?
df2fabff 635 res->sr_slot->slot_nr : -1);
ce5039c1 636
9d12b216 637 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 638out:
639 dprintk("<-- %s status=%d\n", __func__, ret);
640 return ret;
641}
642
643struct nfs41_call_sync_data {
035168ab 644 const struct nfs_server *seq_server;
ce5039c1
AA		 645 struct nfs4_sequence_args *seq_args;
646 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 647};
648
649static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
650{
651 struct nfs41_call_sync_data *data = calldata;
6ba7db34 652 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 653
035168ab
TM		 654 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
655
d9afbd1b 656 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 657}
658
69ab40c4
AA		 659static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
660{
661 struct nfs41_call_sync_data *data = calldata;
662
14516c3a 663 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 664}
665
17280175 666static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 667 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 668 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 669};
670
7c513058
BS		 671static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
672 struct nfs_server *server,
ce5039c1
AA		 673 struct rpc_message *msg,
674 struct nfs4_sequence_args *args,
8fe72bac 675 struct nfs4_sequence_res *res)
ce5039c1
AA		 676{
677 int ret;
678 struct rpc_task *task;
679 struct nfs41_call_sync_data data = {
035168ab 680 .seq_server = server,
ce5039c1
AA		 681 .seq_args = args,
682 .seq_res = res,
ce5039c1
AA		 683 };
684 struct rpc_task_setup task_setup = {
7c513058 685 .rpc_client = clnt,
ce5039c1
AA		 686 .rpc_message = msg,
687 .callback_ops = &nfs41_call_sync_ops,
688 .callback_data = &data
689 };
690
ce5039c1
AA		 691 task = rpc_run_task(&task_setup);
692 if (IS_ERR(task))
693 ret = PTR_ERR(task);
694 else {
695 ret = task->tk_status;
696 rpc_put_task(task);
697 }
698 return ret;
699}
700
df896455 701#else
8fe72bac 702static
9d12b216
TM		 703void nfs41_init_sequence(struct nfs4_sequence_args *args,
704 struct nfs4_sequence_res *res, int cache_reply)
705{
706}
707
8fe72bac
TM		 708static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
709{
710}
711
712
14516c3a
TM		 713static int nfs4_sequence_done(struct rpc_task *task,
714 struct nfs4_sequence_res *res)
df896455 715{
14516c3a 716 return 1;
df896455 717}
cccef3b9
AA		 718#endif /* CONFIG_NFS_V4_1 */
719
fd0c0953 720static
7c513058
BS		 721int _nfs4_call_sync(struct rpc_clnt *clnt,
722 struct nfs_server *server,
cccef3b9
AA		 723 struct rpc_message *msg,
724 struct nfs4_sequence_args *args,
fd0c0953 725 struct nfs4_sequence_res *res)
cccef3b9 726{
7c513058 727 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 728}
729
fd0c0953 730static
7c513058
BS		 731int nfs4_call_sync(struct rpc_clnt *clnt,
732 struct nfs_server *server,
e73b83f2
BS		 733 struct rpc_message *msg,
734 struct nfs4_sequence_args *args,
735 struct nfs4_sequence_res *res,
736 int cache_reply)
737{
fd0c0953 738 nfs41_init_sequence(args, res, cache_reply);
7c513058 739 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 740 args, res);
e73b83f2 741}
cccef3b9 742
38478b24 743static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 744{
38478b24 745 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 746
38478b24 747 spin_lock(&dir->i_lock);
359d7d1c 748 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 749 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 750 nfs_force_lookup_revalidate(dir);
a9a4a87a 751 dir->i_version = cinfo->after;
de242c0b 752 nfs_fscache_invalidate(dir);
38478b24 753 spin_unlock(&dir->i_lock);
1da177e4
LT		 754}
755
e56e0b78 756struct nfs4_opendata {
c6d00e63 757 struct kref kref;
e56e0b78
TM		 758 struct nfs_openargs o_arg;
759 struct nfs_openres o_res;
cdd4e68b
TM		 760 struct nfs_open_confirmargs c_arg;
761 struct nfs_open_confirmres c_res;
6926afd1
TM		 762 struct nfs4_string owner_name;
763 struct nfs4_string group_name;
e56e0b78 764 struct nfs_fattr f_attr;
e56e0b78 765 struct dentry *dir;
82a2c1b7 766 struct dentry *dentry;
e56e0b78 767 struct nfs4_state_owner *owner;
aac00a8d 768 struct nfs4_state *state;
e56e0b78 769 struct iattr attrs;
26e976a8 770 unsigned long timestamp;
3e309914 771 unsigned int rpc_done : 1;
bdeca1b7 772 unsigned int is_recover : 1;
24ac23ab
TM		 773 int rpc_status;
774 int cancelled;
e56e0b78
TM		 775};
776
49f9a0fa
TM		 777static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
778 int err, struct nfs4_exception *exception)
779{
780 if (err != -EINVAL)
781 return false;
782 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
783 return false;
784 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
785 exception->retry = 1;
786 return true;
787}
788
789static enum open_claim_type4
790nfs4_map_atomic_open_claim(struct nfs_server *server,
791 enum open_claim_type4 claim)
792{
793 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
794 return claim;
795 switch (claim) {
796 default:
797 return claim;
798 case NFS4_OPEN_CLAIM_FH:
799 return NFS4_OPEN_CLAIM_NULL;
800 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
801 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
802 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
803 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
804 }
805}
2ced46c2
TM		 806
807static void nfs4_init_opendata_res(struct nfs4_opendata *p)
808{
809 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 810 p->o_res.seqid = p->o_arg.seqid;
811 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 812 p->o_res.server = p->o_arg.server;
5f657530 813 p->o_res.access_request = p->o_arg.access;
2ced46c2 814 nfs_fattr_init(&p->f_attr);
6926afd1 815 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 816}
817
82a2c1b7 818static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 819 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 820 const struct iattr *attrs,
4a1c0893 821 enum open_claim_type4 claim,
8535b2be 822 gfp_t gfp_mask)
e56e0b78 823{
82a2c1b7 824 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 825 struct inode *dir = parent->d_inode;
826 struct nfs_server *server = NFS_SERVER(dir);
827 struct nfs4_opendata *p;
828
8535b2be 829 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 830 if (p == NULL)
831 goto err;
8535b2be 832 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 833 if (p->o_arg.seqid == NULL)
834 goto err_free;
82a2c1b7
AV		 835 nfs_sb_active(dentry->d_sb);
836 p->dentry = dget(dentry);
e56e0b78
TM		 837 p->dir = parent;
838 p->owner = sp;
839 atomic_inc(&sp->so_count);
dc0b027d
TM		 840 p->o_arg.open_flags = flags;
841 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 842 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
843 * will return permission denied for all bits until close */
844 if (!(flags & O_EXCL)) {
845 /* ask server to check for all possible rights as results
846 * are cached */
847 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
848 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 849 }
7539bbab 850 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 851 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
852 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 853 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 854 p->o_arg.server = server;
855 p->o_arg.bitmask = server->attr_bitmask;
1549210f 856 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa
TM		 857 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
858 switch (p->o_arg.claim) {
4a1c0893
TM		 859 case NFS4_OPEN_CLAIM_NULL:
860 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
861 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
862 p->o_arg.fh = NFS_FH(dir);
863 break;
864 case NFS4_OPEN_CLAIM_PREVIOUS:
865 case NFS4_OPEN_CLAIM_FH:
866 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
867 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
868 p->o_arg.fh = NFS_FH(dentry->d_inode);
869 }
536e43d1 870 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 871 __be32 verf[2];
d77d76ff 872
e56e0b78
TM		 873 p->o_arg.u.attrs = &p->attrs;
874 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 875
876 verf[0] = jiffies;
877 verf[1] = current->pid;
878 memcpy(p->o_arg.u.verifier.data, verf,
879 sizeof(p->o_arg.u.verifier.data));
e56e0b78 880 }
cdd4e68b
TM		 881 p->c_arg.fh = &p->o_res.fh;
882 p->c_arg.stateid = &p->o_res.stateid;
883 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 884 nfs4_init_opendata_res(p);
c6d00e63 885 kref_init(&p->kref);
e56e0b78
TM		 886 return p;
887err_free:
888 kfree(p);
889err:
890 dput(parent);
891 return NULL;
892}
893
c6d00e63 894static void nfs4_opendata_free(struct kref *kref)
e56e0b78 895{
c6d00e63
TM		 896 struct nfs4_opendata *p = container_of(kref,
897 struct nfs4_opendata, kref);
82a2c1b7 898 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 899
900 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 901 if (p->state != NULL)
902 nfs4_put_open_state(p->state);
c6d00e63
TM		 903 nfs4_put_state_owner(p->owner);
904 dput(p->dir);
82a2c1b7
AV		 905 dput(p->dentry);
906 nfs_sb_deactive(sb);
6926afd1 907 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 908 kfree(p);
909}
910
911static void nfs4_opendata_put(struct nfs4_opendata *p)
912{
913 if (p != NULL)
914 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 915}
916
06f814a3
TM		 917static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
918{
06f814a3
TM		 919 int ret;
920
06f814a3 921 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 922 return ret;
923}
924
dc0b027d 925static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 926{
927 int ret = 0;
dc0b027d 928
536e43d1 929 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 930 goto out;
931 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 932 case FMODE_READ:
88069f77
TM		 933 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
934 && state->n_rdonly != 0;
6ee41268
TM		 935 break;
936 case FMODE_WRITE:
88069f77
TM		 937 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
938 && state->n_wronly != 0;
6ee41268
TM		 939 break;
940 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 941 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
942 && state->n_rdwr != 0;
6ee41268 943 }
dc0b027d 944out:
6ee41268
TM		 945 return ret;
946}
947
dc0b027d 948static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 949{
652f89f6
TM		 950 if (delegation == NULL)
951 return 0;
dc0b027d 952 if ((delegation->type & fmode) != fmode)
aac00a8d 953 return 0;
15c831bf 954 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 955 return 0;
d25be546
TM		 956 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
957 return 0;
b7391f44 958 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 959 return 1;
960}
961
dc0b027d 962static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 963{
dc0b027d 964 switch (fmode) {
e7616923
TM		 965 case FMODE_WRITE:
966 state->n_wronly++;
967 break;
968 case FMODE_READ:
969 state->n_rdonly++;
970 break;
971 case FMODE_READ|FMODE_WRITE:
972 state->n_rdwr++;
973 }
dc0b027d 974 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 975}
976
dc0b027d 977static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 978{
979 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 980 nfs4_stateid_copy(&state->stateid, stateid);
981 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 982 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 983 switch (fmode) {
003707c7
TM		 984 case FMODE_READ:
985 set_bit(NFS_O_RDONLY_STATE, &state->flags);
986 break;
987 case FMODE_WRITE:
988 set_bit(NFS_O_WRONLY_STATE, &state->flags);
989 break;
990 case FMODE_READ|FMODE_WRITE:
991 set_bit(NFS_O_RDWR_STATE, &state->flags);
992 }
e7616923
TM		 993}
994
dc0b027d 995static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 996{
8bda4e4c 997 write_seqlock(&state->seqlock);
dc0b027d 998 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 999 write_sequnlock(&state->seqlock);
003707c7
TM		 1000}
1001
dc0b027d 1002static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1003{
8bda4e4c
TM		 1004 /*
1005 * Protect the call to nfs4_state_set_mode_locked and
1006 * serialise the stateid update
1007 */
1008 write_seqlock(&state->seqlock);
003707c7 1009 if (deleg_stateid != NULL) {
f597c537 1010 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1011 set_bit(NFS_DELEGATED_STATE, &state->flags);
1012 }
1013 if (open_stateid != NULL)
dc0b027d 1014 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1015 write_sequnlock(&state->seqlock);
1016 spin_lock(&state->owner->so_lock);
dc0b027d 1017 update_open_stateflags(state, fmode);
ec073428 1018 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1019}
1020
dc0b027d 1021static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1022{
1023 struct nfs_inode *nfsi = NFS_I(state->inode);
1024 struct nfs_delegation *deleg_cur;
1025 int ret = 0;
1026
dc0b027d 1027 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1028
1029 rcu_read_lock();
1030 deleg_cur = rcu_dereference(nfsi->delegation);
1031 if (deleg_cur == NULL)
1032 goto no_delegation;
1033
1034 spin_lock(&deleg_cur->lock);
1035 if (nfsi->delegation != deleg_cur ||
d25be546 1036 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1037 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1038 goto no_delegation_unlock;
1039
1040 if (delegation == NULL)
1041 delegation = &deleg_cur->stateid;
f597c537 1042 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1043 goto no_delegation_unlock;
1044
b7391f44 1045 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1046 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1047 ret = 1;
1048no_delegation_unlock:
1049 spin_unlock(&deleg_cur->lock);
1050no_delegation:
1051 rcu_read_unlock();
1052
1053 if (!ret && open_stateid != NULL) {
dc0b027d 1054 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1055 ret = 1;
1056 }
1057
1058 return ret;
1059}
1060
1061
dc0b027d 1062static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1063{
1064 struct nfs_delegation *delegation;
1065
1066 rcu_read_lock();
1067 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1068 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1069 rcu_read_unlock();
1070 return;
1071 }
1072 rcu_read_unlock();
57ec14c5 1073 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1074}
1075
6ee41268 1076static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1077{
1078 struct nfs4_state *state = opendata->state;
1079 struct nfs_inode *nfsi = NFS_I(state->inode);
1080 struct nfs_delegation *delegation;
536e43d1 1081 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1082 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1083 nfs4_stateid stateid;
1084 int ret = -EAGAIN;
1085
aac00a8d 1086 for (;;) {
dc0b027d 1087 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1088 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1089 if (can_open_cached(state, fmode, open_mode)) {
1090 update_open_stateflags(state, fmode);
6ee41268 1091 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1092 goto out_return_state;
1093 }
1094 spin_unlock(&state->owner->so_lock);
1095 }
34310430
TM		 1096 rcu_read_lock();
1097 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1098 if (!can_open_delegated(delegation, fmode)) {
34310430 1099 rcu_read_unlock();
aac00a8d 1100 break;
34310430 1101 }
aac00a8d 1102 /* Save the delegation */
f597c537 1103 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1104 rcu_read_unlock();
fa332941 1105 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1106 if (!opendata->is_recover) {
1107 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1108 if (ret != 0)
1109 goto out;
1110 }
aac00a8d 1111 ret = -EAGAIN;
34310430
TM		 1112
1113 /* Try to update the stateid using the delegation */
dc0b027d 1114 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1115 goto out_return_state;
aac00a8d 1116 }
aac00a8d
TM		 1117out:
1118 return ERR_PTR(ret);
1119out_return_state:
1120 atomic_inc(&state->count);
1121 return state;
1122}
1123
e23008ec
AA		 1124static void
1125nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1126{
1127 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1128 struct nfs_delegation *delegation;
1129 int delegation_flags = 0;
1130
1131 rcu_read_lock();
1132 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1133 if (delegation)
1134 delegation_flags = delegation->flags;
1135 rcu_read_unlock();
1136 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1137 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1138 "returning a delegation for "
1139 "OPEN(CLAIM_DELEGATE_CUR)\n",
1140 clp->cl_hostname);
1141 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1142 nfs_inode_set_delegation(state->inode,
1143 data->owner->so_cred,
1144 &data->o_res);
1145 else
1146 nfs_inode_reclaim_delegation(state->inode,
1147 data->owner->so_cred,
1148 &data->o_res);
1149}
1150
1151/*
1152 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1153 * and update the nfs4_state.
1154 */
1155static struct nfs4_state *
1156_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1157{
1158 struct inode *inode = data->state->inode;
1159 struct nfs4_state *state = data->state;
1160 int ret;
1161
1162 if (!data->rpc_done) {
1163 ret = data->rpc_status;
1164 goto err;
1165 }
1166
1167 ret = -ESTALE;
1168 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1169 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1170 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1171 goto err;
1172
1173 ret = -ENOMEM;
1174 state = nfs4_get_open_state(inode, data->owner);
1175 if (state == NULL)
1176 goto err;
1177
1178 ret = nfs_refresh_inode(inode, &data->f_attr);
1179 if (ret)
1180 goto err;
1181
1182 if (data->o_res.delegation_type != 0)
1183 nfs4_opendata_check_deleg(data, state);
1184 update_open_stateid(state, &data->o_res.stateid, NULL,
1185 data->o_arg.fmode);
1186
1187 return state;
1188err:
1189 return ERR_PTR(ret);
1190
1191}
1192
1193static struct nfs4_state *
1194_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1195{
1196 struct inode *inode;
1197 struct nfs4_state *state = NULL;
1b370bc2 1198 int ret;
24ac23ab 1199
aac00a8d 1200 if (!data->rpc_done) {
6ee41268 1201 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1202 goto out;
1203 }
1204
1b370bc2 1205 ret = -EAGAIN;
24ac23ab 1206 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1207 goto err;
24ac23ab 1208 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1209 ret = PTR_ERR(inode);
03f28e3a 1210 if (IS_ERR(inode))
1b370bc2
TM		 1211 goto err;
1212 ret = -ENOMEM;
24ac23ab
TM		 1213 state = nfs4_get_open_state(inode, data->owner);
1214 if (state == NULL)
1b370bc2 1215 goto err_put_inode;
e23008ec
AA		 1216 if (data->o_res.delegation_type != 0)
1217 nfs4_opendata_check_deleg(data, state);
34310430 1218 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1219 data->o_arg.fmode);
24ac23ab 1220 iput(inode);
aac00a8d 1221out:
7aa262b5 1222 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1223 return state;
1b370bc2
TM		 1224err_put_inode:
1225 iput(inode);
1226err:
1227 return ERR_PTR(ret);
24ac23ab
TM		 1228}
1229
e23008ec
AA		 1230static struct nfs4_state *
1231nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1232{
1233 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1234 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1235 return _nfs4_opendata_to_nfs4_state(data);
1236}
1237
864472e9
TM		 1238static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1239{
1240 struct nfs_inode *nfsi = NFS_I(state->inode);
1241 struct nfs_open_context *ctx;
1242
1243 spin_lock(&state->inode->i_lock);
1244 list_for_each_entry(ctx, &nfsi->open_files, list) {
1245 if (ctx->state != state)
1246 continue;
1247 get_nfs_open_context(ctx);
1248 spin_unlock(&state->inode->i_lock);
1249 return ctx;
1250 }
1251 spin_unlock(&state->inode->i_lock);
1252 return ERR_PTR(-ENOENT);
1253}
1254
4a1c0893
TM		 1255static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1256 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1257{
1258 struct nfs4_opendata *opendata;
1259
4a1c0893
TM		 1260 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1261 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1262 if (opendata == NULL)
1263 return ERR_PTR(-ENOMEM);
1264 opendata->state = state;
1265 atomic_inc(&state->count);
1266 return opendata;
1267}
1268
dc0b027d 1269static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1270{
2ced46c2 1271 struct nfs4_state *newstate;
864472e9
TM		 1272 int ret;
1273
dc0b027d
TM		 1274 opendata->o_arg.open_flags = 0;
1275 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1276 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1277 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1278 nfs4_init_opendata_res(opendata);
b257957e 1279 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1280 if (ret != 0)
1281 return ret;
2ced46c2 1282 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1283 if (IS_ERR(newstate))
1284 return PTR_ERR(newstate);
643168c2 1285 nfs4_close_state(newstate, fmode);
2ced46c2 1286 *res = newstate;
864472e9
TM		 1287 return 0;
1288}
1289
1290static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1291{
864472e9 1292 struct nfs4_state *newstate;
864472e9
TM		 1293 int ret;
1294
1295 /* memory barrier prior to reading state->n_* */
2ced46c2 1296 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1297 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1298 smp_rmb();
1299 if (state->n_rdwr != 0) {
b0ed9dbc 1300 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1301 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1302 if (ret != 0)
1303 return ret;
2ced46c2
TM		 1304 if (newstate != state)
1305 return -ESTALE;
864472e9
TM		 1306 }
1307 if (state->n_wronly != 0) {
b0ed9dbc 1308 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1309 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1310 if (ret != 0)
1311 return ret;
2ced46c2
TM		 1312 if (newstate != state)
1313 return -ESTALE;
864472e9
TM		 1314 }
1315 if (state->n_rdonly != 0) {
b0ed9dbc 1316 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1317 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1318 if (ret != 0)
1319 return ret;
2ced46c2
TM		 1320 if (newstate != state)
1321 return -ESTALE;
864472e9 1322 }
1ac7e2fd
TM		 1323 /*
1324 * We may have performed cached opens for all three recoveries.
1325 * Check if we need to update the current stateid.
1326 */
1327 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1328 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1329 write_seqlock(&state->seqlock);
1ac7e2fd 1330 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1331 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1332 write_sequnlock(&state->seqlock);
1ac7e2fd 1333 }
864472e9
TM		 1334 return 0;
1335}
1336
1da177e4
LT		 1337/*
1338 * OPEN_RECLAIM:
1339 * reclaim state on the server after a reboot.
1da177e4 1340 */
539cd03a 1341static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1342{
1ac7e2fd 1343 struct nfs_delegation *delegation;
864472e9 1344 struct nfs4_opendata *opendata;
dc0b027d 1345 fmode_t delegation_type = 0;
1da177e4
LT		 1346 int status;
1347
4a1c0893
TM		 1348 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1349 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1350 if (IS_ERR(opendata))
1351 return PTR_ERR(opendata);
1ac7e2fd
TM		 1352 rcu_read_lock();
1353 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1354 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1355 delegation_type = delegation->type;
1ac7e2fd 1356 rcu_read_unlock();
864472e9
TM		 1357 opendata->o_arg.u.delegation_type = delegation_type;
1358 status = nfs4_open_recover(opendata, state);
c6d00e63 1359 nfs4_opendata_put(opendata);
1da177e4
LT		 1360 return status;
1361}
1362
539cd03a 1363static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1364{
1365 struct nfs_server *server = NFS_SERVER(state->inode);
1366 struct nfs4_exception exception = { };
1367 int err;
1368 do {
539cd03a 1369 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1370 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1371 continue;
168667c4 1372 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1373 break;
1374 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1375 } while (exception.retry);
1376 return err;
1377}
1378
864472e9
TM		 1379static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1380{
1381 struct nfs_open_context *ctx;
1382 int ret;
1383
1384 ctx = nfs4_state_find_open_context(state);
1385 if (IS_ERR(ctx))
91876b13 1386 return -EAGAIN;
539cd03a 1387 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1388 put_nfs_open_context(ctx);
1389 return ret;
1390}
1391
db4f2e63 1392static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1393{
be76b5b6
TM		 1394 switch (err) {
1395 default:
1396 printk(KERN_ERR "NFS: %s: unhandled error "
1397 "%d.\n", __func__, err);
1398 case 0:
1399 case -ENOENT:
1400 case -ESTALE:
1401 break;
1402 case -NFS4ERR_BADSESSION:
1403 case -NFS4ERR_BADSLOT:
1404 case -NFS4ERR_BAD_HIGH_SLOT:
1405 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1406 case -NFS4ERR_DEADSESSION:
1407 set_bit(NFS_DELEGATED_STATE, &state->flags);
1408 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1409 return -EAGAIN;
1410 case -NFS4ERR_STALE_CLIENTID:
1411 case -NFS4ERR_STALE_STATEID:
1412 set_bit(NFS_DELEGATED_STATE, &state->flags);
1413 case -NFS4ERR_EXPIRED:
1414 /* Don't recall a delegation if it was lost */
1415 nfs4_schedule_lease_recovery(server->nfs_client);
1416 return -EAGAIN;
1417 case -NFS4ERR_DELEG_REVOKED:
1418 case -NFS4ERR_ADMIN_REVOKED:
1419 case -NFS4ERR_BAD_STATEID:
db4f2e63 1420 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1421 nfs_inode_find_state_and_recover(state->inode,
1422 stateid);
1423 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1424 return 0;
1425 case -NFS4ERR_DELAY:
1426 case -NFS4ERR_GRACE:
1427 set_bit(NFS_DELEGATED_STATE, &state->flags);
1428 ssleep(1);
1429 return -EAGAIN;
db4f2e63
TM		 1430 case -ENOMEM:
1431 case -NFS4ERR_DENIED:
1432 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1433 return 0;
be76b5b6 1434 }
1da177e4
LT		 1435 return err;
1436}
1437
db4f2e63
TM		 1438int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1439{
1440 struct nfs_server *server = NFS_SERVER(state->inode);
1441 struct nfs4_opendata *opendata;
1442 int err;
1443
1444 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1445 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1446 if (IS_ERR(opendata))
1447 return PTR_ERR(opendata);
1448 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1449 err = nfs4_open_recover(opendata, state);
1450 nfs4_opendata_put(opendata);
1451 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1452}
1453
cdd4e68b
TM		 1454static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1455{
1456 struct nfs4_opendata *data = calldata;
1457
1458 data->rpc_status = task->tk_status;
26e976a8 1459 if (data->rpc_status == 0) {
f597c537 1460 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1461 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1462 renew_lease(data->o_res.server, data->timestamp);
3e309914 1463 data->rpc_done = 1;
26e976a8 1464 }
cdd4e68b
TM		 1465}
1466
1467static void nfs4_open_confirm_release(void *calldata)
1468{
1469 struct nfs4_opendata *data = calldata;
1470 struct nfs4_state *state = NULL;
1471
1472 /* If this request hasn't been cancelled, do nothing */
1473 if (data->cancelled == 0)
1474 goto out_free;
1475 /* In case of error, no cleanup! */
3e309914 1476 if (!data->rpc_done)
cdd4e68b 1477 goto out_free;
cdd4e68b 1478 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1479 if (!IS_ERR(state))
643168c2 1480 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1481out_free:
c6d00e63 1482 nfs4_opendata_put(data);
cdd4e68b
TM		 1483}
1484
1485static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1486 .rpc_call_done = nfs4_open_confirm_done,
1487 .rpc_release = nfs4_open_confirm_release,
1488};
1489
1490/*
1491 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1492 */
1493static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1494{
1495 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1496 struct rpc_task *task;
5138fde0
TM		 1497 struct rpc_message msg = {
1498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1499 .rpc_argp = &data->c_arg,
1500 .rpc_resp = &data->c_res,
1501 .rpc_cred = data->owner->so_cred,
1502 };
c970aa85
TM		 1503 struct rpc_task_setup task_setup_data = {
1504 .rpc_client = server->client,
5138fde0 1505 .rpc_message = &msg,
c970aa85
TM		 1506 .callback_ops = &nfs4_open_confirm_ops,
1507 .callback_data = data,
101070ca 1508 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1509 .flags = RPC_TASK_ASYNC,
1510 };
1da177e4
LT		 1511 int status;
1512
c6d00e63 1513 kref_get(&data->kref);
3e309914
TM		 1514 data->rpc_done = 0;
1515 data->rpc_status = 0;
5138fde0 1516 data->timestamp = jiffies;
c970aa85 1517 task = rpc_run_task(&task_setup_data);
7a1218a2 1518 if (IS_ERR(task))
cdd4e68b 1519 return PTR_ERR(task);
cdd4e68b
TM		 1520 status = nfs4_wait_for_completion_rpc_task(task);
1521 if (status != 0) {
1522 data->cancelled = 1;
1523 smp_wmb();
1524 } else
1525 status = data->rpc_status;
e6b3c4db 1526 rpc_put_task(task);
1da177e4
LT		 1527 return status;
1528}
1529
24ac23ab 1530static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1531{
24ac23ab
TM		 1532 struct nfs4_opendata *data = calldata;
1533 struct nfs4_state_owner *sp = data->owner;
549b19cc 1534 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1535
24ac23ab 1536 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1537 goto out_wait;
aac00a8d
TM		 1538 /*
1539 * Check if we still need to send an OPEN call, or if we can use
1540 * a delegation instead.
1541 */
1542 if (data->state != NULL) {
1543 struct nfs_delegation *delegation;
1544
dc0b027d 1545 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1546 goto out_no_action;
aac00a8d
TM		 1547 rcu_read_lock();
1548 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1549 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1550 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1551 can_open_delegated(delegation, data->o_arg.fmode))
1552 goto unlock_no_action;
aac00a8d
TM		 1553 rcu_read_unlock();
1554 }
95b72eb0 1555 /* Update client id. */
549b19cc 1556 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1557 switch (data->o_arg.claim) {
1558 case NFS4_OPEN_CLAIM_PREVIOUS:
1559 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1560 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1561 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1562 case NFS4_OPEN_CLAIM_FH:
1563 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1564 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1565 }
26e976a8 1566 data->timestamp = jiffies;
035168ab 1567 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1568 &data->o_arg.seq_args,
2240a9e2
TM		 1569 &data->o_res.seq_res,
1570 task) != 0)
1571 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1572
1573 /* Set the create mode (note dependency on the session type) */
1574 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1575 if (data->o_arg.open_flags & O_EXCL) {
1576 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1577 if (nfs4_has_persistent_session(clp))
1578 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1579 else if (clp->cl_mvops->minor_version > 0)
1580 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1581 }
6ee41268 1582 return;
652f89f6
TM		 1583unlock_no_action:
1584 rcu_read_unlock();
6ee41268
TM		 1585out_no_action:
1586 task->tk_action = NULL;
c8da19b9 1587out_wait:
b75ad4cd 1588 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1589}
1590
24ac23ab
TM		 1591static void nfs4_open_done(struct rpc_task *task, void *calldata)
1592{
1593 struct nfs4_opendata *data = calldata;
1da177e4 1594
24ac23ab 1595 data->rpc_status = task->tk_status;
d898528c 1596
14516c3a
TM		 1597 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1598 return;
d898528c 1599
24ac23ab 1600 if (task->tk_status == 0) {
807d66d8
TM		 1601 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1602 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1603 case S_IFREG:
1604 break;
1605 case S_IFLNK:
24ac23ab 1606 data->rpc_status = -ELOOP;
6f926b5b
TM		 1607 break;
1608 case S_IFDIR:
24ac23ab 1609 data->rpc_status = -EISDIR;
6f926b5b
TM		 1610 break;
1611 default:
24ac23ab 1612 data->rpc_status = -ENOTDIR;
807d66d8 1613 }
6f926b5b 1614 }
26e976a8 1615 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1616 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1617 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1618 }
3e309914 1619 data->rpc_done = 1;
24ac23ab 1620}
6f926b5b 1621
24ac23ab
TM		 1622static void nfs4_open_release(void *calldata)
1623{
1624 struct nfs4_opendata *data = calldata;
1625 struct nfs4_state *state = NULL;
1626
1627 /* If this request hasn't been cancelled, do nothing */
1628 if (data->cancelled == 0)
1629 goto out_free;
1630 /* In case of error, no cleanup! */
3e309914 1631 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1632 goto out_free;
1633 /* In case we need an open_confirm, no cleanup! */
1634 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1635 goto out_free;
24ac23ab 1636 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1637 if (!IS_ERR(state))
643168c2 1638 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1639out_free:
c6d00e63 1640 nfs4_opendata_put(data);
24ac23ab
TM		 1641}
1642
1643static const struct rpc_call_ops nfs4_open_ops = {
1644 .rpc_call_prepare = nfs4_open_prepare,
1645 .rpc_call_done = nfs4_open_done,
1646 .rpc_release = nfs4_open_release,
1647};
1648
b257957e 1649static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1650{
1651 struct inode *dir = data->dir->d_inode;
1652 struct nfs_server *server = NFS_SERVER(dir);
1653 struct nfs_openargs *o_arg = &data->o_arg;
1654 struct nfs_openres *o_res = &data->o_res;
1655 struct rpc_task *task;
5138fde0
TM		 1656 struct rpc_message msg = {
1657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1658 .rpc_argp = o_arg,
1659 .rpc_resp = o_res,
1660 .rpc_cred = data->owner->so_cred,
1661 };
c970aa85
TM		 1662 struct rpc_task_setup task_setup_data = {
1663 .rpc_client = server->client,
5138fde0 1664 .rpc_message = &msg,
c970aa85
TM		 1665 .callback_ops = &nfs4_open_ops,
1666 .callback_data = data,
101070ca 1667 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1668 .flags = RPC_TASK_ASYNC,
1669 };
24ac23ab
TM		 1670 int status;
1671
9d12b216 1672 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1673 kref_get(&data->kref);
3e309914
TM		 1674 data->rpc_done = 0;
1675 data->rpc_status = 0;
2ced46c2 1676 data->cancelled = 0;
bdeca1b7
TM		 1677 data->is_recover = 0;
1678 if (isrecover) {
8fe72bac 1679 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1680 data->is_recover = 1;
1681 }
c970aa85 1682 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1683 if (IS_ERR(task))
1684 return PTR_ERR(task);
1685 status = nfs4_wait_for_completion_rpc_task(task);
1686 if (status != 0) {
1687 data->cancelled = 1;
1688 smp_wmb();
1689 } else
1690 status = data->rpc_status;
1691 rpc_put_task(task);
1692
1693 return status;
1694}
1695
1696static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1697{
1698 struct inode *dir = data->dir->d_inode;
1699 struct nfs_openres *o_res = &data->o_res;
1700 int status;
1701
1702 status = nfs4_run_open_task(data, 1);
1703 if (status != 0 || !data->rpc_done)
1704 return status;
1705
6926afd1
TM		 1706 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1707
b257957e
AB		 1708 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1709 status = _nfs4_proc_open_confirm(data);
1710 if (status != 0)
1711 return status;
1712 }
1713
1714 return status;
1715}
1716
6168f62c
WAA		 1717static int nfs4_opendata_access(struct rpc_cred *cred,
1718 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1719 struct nfs4_state *state, fmode_t fmode,
1720 int openflags)
6168f62c
WAA		 1721{
1722 struct nfs_access_entry cache;
1723 u32 mask;
1724
1725 /* access call failed or for some reason the server doesn't
1726 * support any access modes -- defer access call until later */
1727 if (opendata->o_res.access_supported == 0)
1728 return 0;
1729
1730 mask = 0;
bbd3a8ee 1731 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1732 * write mode bits, but POSIX allows the creating process to write.
1733 * use openflags to check for exec, because fmode won't
1734 * always have FMODE_EXEC set when file open for exec. */
1735 if (openflags & __FMODE_EXEC) {
1736 /* ONLY check for exec rights */
1737 mask = MAY_EXEC;
1738 } else if (fmode & FMODE_READ)
1739 mask = MAY_READ;
6168f62c
WAA		 1740
1741 cache.cred = cred;
1742 cache.jiffies = jiffies;
1743 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1744 nfs_access_add_cache(state->inode, &cache);
1745
bbd3a8ee 1746 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1747 return 0;
1748
1749 /* even though OPEN succeeded, access is denied. Close the file */
1750 nfs4_close_state(state, fmode);
998f40b5 1751 return -EACCES;
6168f62c
WAA		 1752}
1753
b257957e
AB		 1754/*
1755 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1756 */
1757static int _nfs4_proc_open(struct nfs4_opendata *data)
1758{
1759 struct inode *dir = data->dir->d_inode;
1760 struct nfs_server *server = NFS_SERVER(dir);
1761 struct nfs_openargs *o_arg = &data->o_arg;
1762 struct nfs_openres *o_res = &data->o_res;
1763 int status;
1764
1765 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1766 if (!data->rpc_done)
1767 return status;
1768 if (status != 0) {
1769 if (status == -NFS4ERR_BADNAME &&
1770 !(o_arg->open_flags & O_CREAT))
1771 return -ENOENT;
24ac23ab 1772 return status;
08ef7bd3 1773 }
24ac23ab 1774
6926afd1
TM		 1775 nfs_fattr_map_and_free_names(server, &data->f_attr);
1776
90ff0c54 1777 if (o_arg->open_flags & O_CREAT)
56ae19f3 1778 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1779 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1780 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1781 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1782 status = _nfs4_proc_open_confirm(data);
1da177e4 1783 if (status != 0)
24ac23ab 1784 return status;
1da177e4
LT		 1785 }
1786 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1787 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1788 return 0;
1da177e4
LT		 1789}
1790
d83217c1
AA		 1791static int nfs4_recover_expired_lease(struct nfs_server *server)
1792{
1793 return nfs4_client_recover_expired_lease(server->nfs_client);
1794}
1795
1da177e4
LT		 1796/*
1797 * OPEN_EXPIRED:
1798 * reclaim state on the server after a network partition.
1799 * Assumes caller holds the appropriate lock
1800 */
539cd03a 1801static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1802{
e56e0b78 1803 struct nfs4_opendata *opendata;
864472e9 1804 int ret;
1da177e4 1805
4a1c0893 1806 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1807 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1808 if (IS_ERR(opendata))
1809 return PTR_ERR(opendata);
864472e9 1810 ret = nfs4_open_recover(opendata, state);
35d05778 1811 if (ret == -ESTALE)
3d4ff43d 1812 d_drop(ctx->dentry);
c6d00e63 1813 nfs4_opendata_put(opendata);
864472e9 1814 return ret;
1da177e4
LT		 1815}
1816
a9ed2e25 1817static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1818{
539cd03a 1819 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1820 struct nfs4_exception exception = { };
1821 int err;
1822
1823 do {
539cd03a 1824 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1825 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1826 continue;
a9ed2e25
TM		 1827 switch (err) {
1828 default:
1829 goto out;
1830 case -NFS4ERR_GRACE:
1831 case -NFS4ERR_DELAY:
1832 nfs4_handle_exception(server, err, &exception);
1833 err = 0;
1834 }
202b50dc 1835 } while (exception.retry);
a9ed2e25 1836out:
202b50dc
TM		 1837 return err;
1838}
1839
1da177e4
LT		 1840static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1841{
1da177e4 1842 struct nfs_open_context *ctx;
864472e9 1843 int ret;
1da177e4 1844
864472e9
TM		 1845 ctx = nfs4_state_find_open_context(state);
1846 if (IS_ERR(ctx))
91876b13 1847 return -EAGAIN;
539cd03a 1848 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1849 put_nfs_open_context(ctx);
1850 return ret;
1da177e4
LT		 1851}
1852
f062eb6c 1853#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1854static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1855{
f062eb6c 1856 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1857 nfs4_stateid *stateid = &state->stateid;
1858 int status;
1859
1860 /* If a state reset has been done, test_stateid is unneeded */
1861 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1862 return;
1863
1864 status = nfs41_test_stateid(server, stateid);
1865 if (status != NFS_OK) {
1866 /* Free the stateid unless the server explicitly
1867 * informs us the stateid is unrecognized. */
1868 if (status != -NFS4ERR_BAD_STATEID)
1869 nfs41_free_stateid(server, stateid);
6938867e 1870 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1871
6938867e
BS		 1872 write_seqlock(&state->seqlock);
1873 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1874 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1875 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1876 }
1877}
1878
1879/**
1880 * nfs41_check_open_stateid - possibly free an open stateid
1881 *
1882 * @state: NFSv4 state for an inode
1883 *
1884 * Returns NFS_OK if recovery for this stateid is now finished.
1885 * Otherwise a negative NFS4ERR value is returned.
1886 */
1887static int nfs41_check_open_stateid(struct nfs4_state *state)
1888{
1889 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1890 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1891 int status;
1892
1893 /* If a state reset has been done, test_stateid is unneeded */
1894 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1895 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1896 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1897 return -NFS4ERR_BAD_STATEID;
1898
1899 status = nfs41_test_stateid(server, stateid);
1900 if (status != NFS_OK) {
1901 /* Free the stateid unless the server explicitly
1902 * informs us the stateid is unrecognized. */
1903 if (status != -NFS4ERR_BAD_STATEID)
1904 nfs41_free_stateid(server, stateid);
1905
1906 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1907 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1908 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 1909 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 1910 }
1911 return status;
1912}
1913
1914static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1915{
eb64cf96 1916 int status;
b01dd1d8 1917
3e60ffdd
CL		 1918 nfs41_clear_delegation_stateid(state);
1919 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1920 if (status != NFS_OK)
1921 status = nfs4_open_expired(sp, state);
1922 return status;
f062eb6c
BS		 1923}
1924#endif
1925
aa53ed54
JL		 1926/*
1927 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1928 * fields corresponding to attributes that were used to store the verifier.
1929 * Make sure we clobber those fields in the later setattr call
1930 */
1931static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1932{
1933 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1934 !(sattr->ia_valid & ATTR_ATIME_SET))
1935 sattr->ia_valid |= ATTR_ATIME;
1936
1937 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1938 !(sattr->ia_valid & ATTR_MTIME_SET))
1939 sattr->ia_valid |= ATTR_MTIME;
1940}
1941
c21443c2
TM		 1942static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1943 fmode_t fmode,
1944 int flags,
1945 struct nfs4_state **res)
1946{
1947 struct nfs4_state_owner *sp = opendata->owner;
1948 struct nfs_server *server = sp->so_server;
1949 struct nfs4_state *state;
1950 unsigned int seq;
1951 int ret;
1952
1953 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1954
1955 ret = _nfs4_proc_open(opendata);
1956 if (ret != 0)
1957 goto out;
1958
1959 state = nfs4_opendata_to_nfs4_state(opendata);
1960 ret = PTR_ERR(state);
1961 if (IS_ERR(state))
1962 goto out;
1963 if (server->caps & NFS_CAP_POSIX_LOCK)
1964 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1965
1966 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1967 if (ret != 0)
1968 goto out;
1969
91876b13 1970 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1971 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1972 *res = state;
1973out:
1974 return ret;
1975}
1976
1da177e4 1977/*
24ac23ab 1978 * Returns a referenced nfs4_state
1da177e4 1979 */
82be417a
AA		 1980static int _nfs4_do_open(struct inode *dir,
1981 struct dentry *dentry,
1982 fmode_t fmode,
1983 int flags,
1984 struct iattr *sattr,
1985 struct rpc_cred *cred,
1986 struct nfs4_state **res,
1987 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1988{
1989 struct nfs4_state_owner *sp;
1990 struct nfs4_state *state = NULL;
1991 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1992 struct nfs4_opendata *opendata;
49f9a0fa 1993 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 1994 int status;
1da177e4
LT		 1995
1996 /* Protect against reboot recovery conflicts */
1da177e4 1997 status = -ENOMEM;
d1e284d5
TM		 1998 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1999 if (sp == NULL) {
1da177e4
LT		 2000 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2001 goto out_err;
2002 }
58d9714a
TM		 2003 status = nfs4_recover_expired_lease(server);
2004 if (status != 0)
b4454fe1 2005 goto err_put_state_owner;
82a2c1b7
AV		 2006 if (dentry->d_inode != NULL)
2007 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2008 status = -ENOMEM;
49f9a0fa
TM		 2009 if (dentry->d_inode)
2010 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2011 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 2012 claim, GFP_KERNEL);
e56e0b78 2013 if (opendata == NULL)
95d35cb4 2014 goto err_put_state_owner;
1da177e4 2015
82be417a
AA		 2016 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2017 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2018 if (!opendata->f_attr.mdsthreshold)
2019 goto err_opendata_put;
1549210f 2020 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2021 }
82a2c1b7
AV		 2022 if (dentry->d_inode != NULL)
2023 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2024
c21443c2 2025 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 2026 if (status != 0)
2027 goto err_opendata_put;
2028
549b19cc
TM		 2029 if ((opendata->o_arg.open_flags & O_EXCL) &&
2030 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2031 nfs4_exclusive_attrset(opendata, sattr);
2032
2033 nfs_fattr_init(opendata->o_res.f_attr);
2034 status = nfs4_do_setattr(state->inode, cred,
2035 opendata->o_res.f_attr, sattr,
2036 state);
2037 if (status == 0)
2038 nfs_setattr_update_inode(state->inode, sattr);
2039 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2040 }
82be417a
AA		 2041
2042 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2043 *ctx_th = opendata->f_attr.mdsthreshold;
2044 else
2045 kfree(opendata->f_attr.mdsthreshold);
2046 opendata->f_attr.mdsthreshold = NULL;
2047
c6d00e63 2048 nfs4_opendata_put(opendata);
1da177e4 2049 nfs4_put_state_owner(sp);
1da177e4
LT		 2050 *res = state;
2051 return 0;
c6d00e63 2052err_opendata_put:
82be417a 2053 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2054 nfs4_opendata_put(opendata);
e56e0b78
TM		 2055err_put_state_owner:
2056 nfs4_put_state_owner(sp);
1da177e4 2057out_err:
1da177e4
LT		 2058 *res = NULL;
2059 return status;
2060}
2061
2062
82be417a
AA		 2063static struct nfs4_state *nfs4_do_open(struct inode *dir,
2064 struct dentry *dentry,
2065 fmode_t fmode,
2066 int flags,
2067 struct iattr *sattr,
2068 struct rpc_cred *cred,
2069 struct nfs4_threshold **ctx_th)
1da177e4 2070{
49f9a0fa 2071 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2072 struct nfs4_exception exception = { };
2073 struct nfs4_state *res;
2074 int status;
2075
6168f62c 2076 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2077 do {
82be417a
AA		 2078 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2079 &res, ctx_th);
1da177e4
LT		 2080 if (status == 0)
2081 break;
2082 /* NOTE: BAD_SEQID means the server and client disagree about the
2083 * book-keeping w.r.t. state-changing operations
2084 * (OPEN/CLOSE/LOCK/LOCKU...)
2085 * It is actually a sign of a bug on the client or on the server.
2086 *
2087 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2088 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2089 * have unhashed the old state_owner for us, and that we can
2090 * therefore safely retry using a new one. We should still warn
2091 * the user though...
2092 */
2093 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2094 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2095 " returned a bad sequence-id error!\n",
2096 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2097 exception.retry = 1;
2098 continue;
2099 }
550f5747
TM		 2100 /*
2101 * BAD_STATEID on OPEN means that the server cancelled our
2102 * state before it received the OPEN_CONFIRM.
2103 * Recover by retrying the request as per the discussion
2104 * on Page 181 of RFC3530.
2105 */
2106 if (status == -NFS4ERR_BAD_STATEID) {
2107 exception.retry = 1;
2108 continue;
2109 }
aac00a8d
TM		 2110 if (status == -EAGAIN) {
2111 /* We must have found a delegation */
2112 exception.retry = 1;
2113 continue;
2114 }
49f9a0fa
TM		 2115 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2116 continue;
2117 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2118 status, &exception));
2119 } while (exception.retry);
2120 return res;
2121}
2122
659bfcd6
TM		 2123static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2124 struct nfs_fattr *fattr, struct iattr *sattr,
2125 struct nfs4_state *state)
1da177e4 2126{
3e4f6290 2127 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2128 struct nfs_setattrargs arg = {
3e4f6290 2129 .fh = NFS_FH(inode),
1da177e4
LT		 2130 .iap = sattr,
2131 .server = server,
2132 .bitmask = server->attr_bitmask,
2133 };
2134 struct nfs_setattrres res = {
2135 .fattr = fattr,
2136 .server = server,
2137 };
2138 struct rpc_message msg = {
659bfcd6
TM		 2139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2140 .rpc_argp = &arg,
2141 .rpc_resp = &res,
2142 .rpc_cred = cred,
1da177e4 2143 };
26e976a8 2144 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2145 fmode_t fmode;
2146 bool truncate;
65e4308d 2147 int status;
1da177e4 2148
0e574af1 2149 nfs_fattr_init(fattr);
1da177e4 2150
ee3ae84e
TM		 2151 /* Servers should only apply open mode checks for file size changes */
2152 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2153 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2154
2155 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2156 /* Use that stateid */
2157 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2158 struct nfs_lockowner lockowner = {
2159 .l_owner = current->files,
2160 .l_pid = current->tgid,
2161 };
4fc8796d 2162 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2163 &lockowner);
08e9eac4 2164 } else
f597c537 2165 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2166
7c513058 2167 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2168 if (status == 0 && state != NULL)
2169 renew_lease(server, timestamp);
65e4308d 2170 return status;
1da177e4
LT		 2171}
2172
659bfcd6
TM		 2173static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2174 struct nfs_fattr *fattr, struct iattr *sattr,
2175 struct nfs4_state *state)
1da177e4 2176{
3e4f6290 2177 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2178 struct nfs4_exception exception = {
2179 .state = state,
3114ea7a 2180 .inode = inode,
a1d0b5ee 2181 };
1da177e4
LT		 2182 int err;
2183 do {
451146be
TM		 2184 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2185 switch (err) {
2186 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2187 if (!(sattr->ia_valid & ATTR_SIZE)) {
2188 pr_warn_once("NFSv4: server %s is incorrectly "
2189 "applying open mode checks to "
2190 "a SETATTR that is not "
2191 "changing file size.\n",
2192 server->nfs_client->cl_hostname);
2193 }
451146be
TM		 2194 if (state && !(state->state & FMODE_WRITE)) {
2195 err = -EBADF;
2196 if (sattr->ia_valid & ATTR_OPEN)
2197 err = -EACCES;
2198 goto out;
2199 }
2200 }
2201 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2202 } while (exception.retry);
451146be 2203out:
1da177e4
LT		 2204 return err;
2205}
2206
2207struct nfs4_closedata {
2208 struct inode *inode;
2209 struct nfs4_state *state;
2210 struct nfs_closeargs arg;
2211 struct nfs_closeres res;
516a6af6 2212 struct nfs_fattr fattr;
26e976a8 2213 unsigned long timestamp;
f7e8917a
FI		 2214 bool roc;
2215 u32 roc_barrier;
1da177e4
LT		 2216};
2217
963d8fe5 2218static void nfs4_free_closedata(void *data)
9512135d 2219{
963d8fe5
TM		 2220 struct nfs4_closedata *calldata = data;
2221 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2222 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2223
f7e8917a
FI		 2224 if (calldata->roc)
2225 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2226 nfs4_put_open_state(calldata->state);
2227 nfs_free_seqid(calldata->arg.seqid);
9512135d 2228 nfs4_put_state_owner(sp);
322b2b90 2229 nfs_sb_deactive(sb);
9512135d
TM		 2230 kfree(calldata);
2231}
2232
88069f77
TM		 2233static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2234 fmode_t fmode)
2235{
2236 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2237 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2238 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2239 case FMODE_WRITE:
88069f77 2240 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2241 break;
2242 case FMODE_READ:
88069f77 2243 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2244 break;
2245 case 0:
2246 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2247 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2248 clear_bit(NFS_OPEN_STATE, &state->flags);
2249 }
88069f77
TM		 2250 spin_unlock(&state->owner->so_lock);
2251}
2252
963d8fe5 2253static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2254{
963d8fe5 2255 struct nfs4_closedata *calldata = data;
1da177e4 2256 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2257 struct nfs_server *server = NFS_SERVER(calldata->inode);
2258
a3ca5651 2259 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2260 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2261 return;
1da177e4
LT		 2262 /* hmm. we are done with the inode, and in the process of freeing
2263 * the state_owner. we keep this around to process errors
2264 */
1da177e4
LT		 2265 switch (task->tk_status) {
2266 case 0:
f7e8917a
FI		 2267 if (calldata->roc)
2268 pnfs_roc_set_barrier(state->inode,
2269 calldata->roc_barrier);
45328c35 2270 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2271 renew_lease(server, calldata->timestamp);
88069f77
TM		 2272 nfs4_close_clear_stateid_flags(state,
2273 calldata->arg.fmode);
1da177e4
LT		 2274 break;
2275 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2276 case -NFS4ERR_OLD_STATEID:
2277 case -NFS4ERR_BAD_STATEID:
1da177e4 2278 case -NFS4ERR_EXPIRED:
dc0b027d 2279 if (calldata->arg.fmode == 0)
9e33bed5 2280 break;
1da177e4 2281 default:
72211dbe
TM		 2282 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2283 rpc_restart_call_prepare(task);
1da177e4 2284 }
72211dbe 2285 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2286 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2287 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2288}
2289
4ce70ada 2290static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2291{
4ce70ada 2292 struct nfs4_closedata *calldata = data;
9512135d 2293 struct nfs4_state *state = calldata->state;
7fdab069 2294 struct inode *inode = calldata->inode;
88069f77 2295 int call_close = 0;
9512135d 2296
a3ca5651 2297 dprintk("%s: begin!\n", __func__);
963d8fe5 2298 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2299 goto out_wait;
003707c7 2300
88069f77
TM		 2301 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2302 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2303 spin_lock(&state->owner->so_lock);
003707c7 2304 /* Calculate the change in open mode */
e7616923 2305 if (state->n_rdwr == 0) {
003707c7 2306 if (state->n_rdonly == 0) {
88069f77
TM		 2307 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2308 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2309 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2310 }
2311 if (state->n_wronly == 0) {
88069f77
TM		 2312 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2313 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2314 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2315 }
e7616923 2316 }
5d422301
TM		 2317 if (!nfs4_valid_open_stateid(state))
2318 call_close = 0;
4cecb76f 2319 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2320
2321 if (!call_close) {
963d8fe5 2322 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2323 goto out_no_action;
9512135d 2324 }
88069f77 2325
f7e8917a 2326 if (calldata->arg.fmode == 0) {
88069f77 2327 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2328 if (calldata->roc &&
b9536ad5
AA		 2329 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2330 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2331 goto out_wait;
b9536ad5 2332 }
f7e8917a 2333 }
88069f77 2334
516a6af6 2335 nfs_fattr_init(calldata->res.fattr);
26e976a8 2336 calldata->timestamp = jiffies;
7fdab069 2337 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2338 &calldata->arg.seq_args,
2339 &calldata->res.seq_res,
2240a9e2
TM		 2340 task) != 0)
2341 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2342 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2343 return;
2344out_no_action:
2345 task->tk_action = NULL;
2346out_wait:
2347 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2348}
2349
963d8fe5 2350static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2351 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2352 .rpc_call_done = nfs4_close_done,
2353 .rpc_release = nfs4_free_closedata,
2354};
2355
1da177e4
LT		 2356/*
2357 * It is possible for data to be read/written from a mem-mapped file
2358 * after the sys_close call (which hits the vfs layer as a flush).
2359 * This means that we can't safely call nfsv4 close on a file until
2360 * the inode is cleared. This in turn means that we are not good
2361 * NFSv4 citizens - we do not indicate to the server to update the file's
2362 * share state even when we are done with one of the three share
2363 * stateid's in the inode.
2364 *
2365 * NOTE: Caller must be holding the sp->so_owner semaphore!
2366 */
1f7977c1 2367int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2368{
4a35bd41 2369 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2370 struct nfs4_closedata *calldata;
b39e625b
TM		 2371 struct nfs4_state_owner *sp = state->owner;
2372 struct rpc_task *task;
5138fde0
TM		 2373 struct rpc_message msg = {
2374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2375 .rpc_cred = state->owner->so_cred,
2376 };
c970aa85
TM		 2377 struct rpc_task_setup task_setup_data = {
2378 .rpc_client = server->client,
5138fde0 2379 .rpc_message = &msg,
c970aa85 2380 .callback_ops = &nfs4_close_ops,
101070ca 2381 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2382 .flags = RPC_TASK_ASYNC,
2383 };
9512135d 2384 int status = -ENOMEM;
1da177e4 2385
8535b2be 2386 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2387 if (calldata == NULL)
9512135d 2388 goto out;
9d12b216 2389 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2390 calldata->inode = state->inode;
1da177e4 2391 calldata->state = state;
4a35bd41 2392 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2393 calldata->arg.stateid = &state->open_stateid;
1da177e4 2394 /* Serialization for the sequence id */
8535b2be 2395 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2396 if (calldata->arg.seqid == NULL)
2397 goto out_free_calldata;
dc0b027d 2398 calldata->arg.fmode = 0;
a65318bf 2399 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2400 calldata->res.fattr = &calldata->fattr;
c1d51931 2401 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2402 calldata->res.server = server;
1f7977c1 2403 calldata->roc = pnfs_roc(state->inode);
643168c2 2404 nfs_sb_active(calldata->inode->i_sb);
9512135d 2405
1174dd1f
TM		 2406 msg.rpc_argp = &calldata->arg;
2407 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2408 task_setup_data.callback_data = calldata;
2409 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2410 if (IS_ERR(task))
2411 return PTR_ERR(task);
a49c3c77
TM		 2412 status = 0;
2413 if (wait)
2414 status = rpc_wait_for_completion_task(task);
b39e625b 2415 rpc_put_task(task);
a49c3c77 2416 return status;
9512135d
TM		 2417out_free_calldata:
2418 kfree(calldata);
2419out:
b39e625b
TM		 2420 nfs4_put_open_state(state);
2421 nfs4_put_state_owner(sp);
9512135d 2422 return status;
1da177e4
LT		 2423}
2424
2b484297 2425static struct inode *
cd9a1c0e 2426nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2427{
1da177e4 2428 struct nfs4_state *state;
1da177e4 2429
565277f6 2430 /* Protect against concurrent sillydeletes */
82be417a
AA		 2431 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2432 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2433 if (IS_ERR(state))
2434 return ERR_CAST(state);
cd9a1c0e 2435 ctx->state = state;
f46e0bd3 2436 return igrab(state->inode);
1da177e4
LT		 2437}
2438
1185a552 2439static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2440{
2441 if (ctx->state == NULL)
2442 return;
2443 if (is_sync)
643168c2 2444 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2445 else
643168c2 2446 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2447}
1da177e4
LT		 2448
2449static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2450{
43652ad5
BH		 2451 struct nfs4_server_caps_arg args = {
2452 .fhandle = fhandle,
2453 };
1da177e4
LT		 2454 struct nfs4_server_caps_res res = {};
2455 struct rpc_message msg = {
2456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2457 .rpc_argp = &args,
1da177e4
LT		 2458 .rpc_resp = &res,
2459 };
2460 int status;
2461
7c513058 2462 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2463 if (status == 0) {
2464 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2465 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2466 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2467 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2468 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2469 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2470 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2471 server->caps |= NFS_CAP_ACLS;
2472 if (res.has_links != 0)
2473 server->caps |= NFS_CAP_HARDLINKS;
2474 if (res.has_symlinks != 0)
2475 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2476 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2477 server->caps |= NFS_CAP_FILEID;
2478 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2479 server->caps |= NFS_CAP_MODE;
2480 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2481 server->caps |= NFS_CAP_NLINK;
2482 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2483 server->caps |= NFS_CAP_OWNER;
2484 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2485 server->caps |= NFS_CAP_OWNER_GROUP;
2486 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2487 server->caps |= NFS_CAP_ATIME;
2488 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2489 server->caps |= NFS_CAP_CTIME;
2490 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2491 server->caps |= NFS_CAP_MTIME;
2492
a65318bf
TM		 2493 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2494 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2495 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2496 server->acl_bitmask = res.acl_bitmask;
264e6351 2497 server->fh_expire_type = res.fh_expire_type;
1da177e4 2498 }
cccef3b9 2499
1da177e4
LT		 2500 return status;
2501}
2502
55a97593 2503int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2504{
2505 struct nfs4_exception exception = { };
2506 int err;
2507 do {
2508 err = nfs4_handle_exception(server,
2509 _nfs4_server_capabilities(server, fhandle),
2510 &exception);
2511 } while (exception.retry);
2512 return err;
2513}
2514
2515static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2516 struct nfs_fsinfo *info)
2517{
1da177e4
LT		 2518 struct nfs4_lookup_root_arg args = {
2519 .bitmask = nfs4_fattr_bitmap,
2520 };
2521 struct nfs4_lookup_res res = {
2522 .server = server,
0e574af1 2523 .fattr = info->fattr,
1da177e4
LT		 2524 .fh = fhandle,
2525 };
2526 struct rpc_message msg = {
2527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2528 .rpc_argp = &args,
2529 .rpc_resp = &res,
2530 };
008f55d0 2531
0e574af1 2532 nfs_fattr_init(info->fattr);
7c513058 2533 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2534}
2535
2536static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2537 struct nfs_fsinfo *info)
2538{
2539 struct nfs4_exception exception = { };
2540 int err;
2541 do {
fb8a5ba8
BS		 2542 err = _nfs4_lookup_root(server, fhandle, info);
2543 switch (err) {
2544 case 0:
2545 case -NFS4ERR_WRONGSEC:
05e9cfb4 2546 goto out;
fb8a5ba8
BS		 2547 default:
2548 err = nfs4_handle_exception(server, err, &exception);
2549 }
1da177e4 2550 } while (exception.retry);
05e9cfb4 2551out:
1da177e4
LT		 2552 return err;
2553}
2554
8f70e95f
BS		 2555static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2556 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2557{
2558 struct rpc_auth *auth;
2559 int ret;
2560
2561 auth = rpcauth_create(flavor, server->client);
e8d920c5 2562 if (IS_ERR(auth)) {
75bc8821 2563 ret = -EACCES;
8f70e95f
BS		 2564 goto out;
2565 }
2566 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2567out:
2568 return ret;
2569}
2570
9a744ba3
CL		 2571/*
2572 * Retry pseudoroot lookup with various security flavors. We do this when:
2573 *
2574 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2575 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2576 *
2577 * Returns zero on success, or a negative NFS4ERR value, or a
2578 * negative errno value.
2579 */
801a16dc 2580static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2581 struct nfs_fsinfo *info)
1da177e4 2582{
9a744ba3
CL		 2583 /* Per 3530bis 15.33.5 */
2584 static const rpc_authflavor_t flav_array[] = {
2585 RPC_AUTH_GSS_KRB5P,
2586 RPC_AUTH_GSS_KRB5I,
2587 RPC_AUTH_GSS_KRB5,
c4eafe11 2588 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2589 RPC_AUTH_NULL,
2590 };
2591 int status = -EPERM;
2592 size_t i;
6a1a1e34 2593
9a744ba3 2594 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2595 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2596 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2597 continue;
2598 break;
8f70e95f 2599 }
9a744ba3 2600
fb8a5ba8
BS		 2601 /*
2602 * -EACCESS could mean that the user doesn't have correct permissions
2603 * to access the mount. It could also mean that we tried to mount
2604 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2605 * existing mount programs don't handle -EACCES very well so it should
2606 * be mapped to -EPERM instead.
2607 */
2608 if (status == -EACCES)
2609 status = -EPERM;
801a16dc
BS		 2610 return status;
2611}
2612
2ed4b95b
CL		 2613static int nfs4_do_find_root_sec(struct nfs_server *server,
2614 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2615{
2616 int mv = server->nfs_client->cl_minorversion;
2617 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2618}
2619
2620/**
2621 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2622 * @server: initialized nfs_server handle
2623 * @fhandle: we fill in the pseudo-fs root file handle
2624 * @info: we fill in an FSINFO struct
2625 *
2626 * Returns zero on success, or a negative errno.
801a16dc 2627 */
3028eb2b
BS		 2628int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2629 struct nfs_fsinfo *info)
801a16dc 2630{
2ed4b95b
CL		 2631 int status;
2632
2633 status = nfs4_lookup_root(server, fhandle, info);
2634 if ((status == -NFS4ERR_WRONGSEC) &&
2635 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2636 status = nfs4_do_find_root_sec(server, fhandle, info);
2637
1da177e4
LT		 2638 if (status == 0)
2639 status = nfs4_server_capabilities(server, fhandle);
2640 if (status == 0)
2641 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2642
c12e87f4 2643 return nfs4_map_errors(status);
1da177e4
LT		 2644}
2645
bae36241
BS		 2646static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2647 struct nfs_fsinfo *info)
2648{
2649 int error;
2650 struct nfs_fattr *fattr = info->fattr;
2651
2652 error = nfs4_server_capabilities(server, mntfh);
2653 if (error < 0) {
2654 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2655 return error;
2656 }
2657
2658 error = nfs4_proc_getattr(server, mntfh, fattr);
2659 if (error < 0) {
2660 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2661 return error;
2662 }
2663
2664 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2665 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2666 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2667
2668 return error;
2669}
2670
6b97fd3d
MN		 2671/*
2672 * Get locations and (maybe) other attributes of a referral.
2673 * Note that we'll actually follow the referral later when
2674 * we detect fsid mismatch in inode revalidation
2675 */
f05d147f
BS		 2676static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2677 const struct qstr *name, struct nfs_fattr *fattr,
2678 struct nfs_fh *fhandle)
6b97fd3d
MN		 2679{
2680 int status = -ENOMEM;
2681 struct page *page = NULL;
2682 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2683
2684 page = alloc_page(GFP_KERNEL);
2685 if (page == NULL)
2686 goto out;
2687 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2688 if (locations == NULL)
2689 goto out;
2690
f05d147f 2691 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2692 if (status != 0)
2693 goto out;
2694 /* Make sure server returned a different fsid for the referral */
2695 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2696 dprintk("%s: server did not return a different fsid for"
2697 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2698 status = -EIO;
2699 goto out;
2700 }
533eb461
AA		 2701 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2702 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2703
533eb461 2704 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2705 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2706 memset(fhandle, 0, sizeof(struct nfs_fh));
2707out:
2708 if (page)
2709 __free_page(page);
5d7ca35a 2710 kfree(locations);
6b97fd3d
MN		 2711 return status;
2712}
2713
1da177e4
LT		 2714static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2715{
2716 struct nfs4_getattr_arg args = {
2717 .fh = fhandle,
2718 .bitmask = server->attr_bitmask,
2719 };
2720 struct nfs4_getattr_res res = {
2721 .fattr = fattr,
2722 .server = server,
2723 };
2724 struct rpc_message msg = {
2725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2726 .rpc_argp = &args,
2727 .rpc_resp = &res,
2728 };
2729
0e574af1 2730 nfs_fattr_init(fattr);
7c513058 2731 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2732}
2733
2734static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2735{
2736 struct nfs4_exception exception = { };
2737 int err;
2738 do {
2739 err = nfs4_handle_exception(server,
2740 _nfs4_proc_getattr(server, fhandle, fattr),
2741 &exception);
2742 } while (exception.retry);
2743 return err;
2744}
2745
2746/*
2747 * The file is not closed if it is opened due to the a request to change
2748 * the size of the file. The open call will not be needed once the
2749 * VFS layer lookup-intents are implemented.
2750 *
2751 * Close is called when the inode is destroyed.
2752 * If we haven't opened the file for O_WRONLY, we
2753 * need to in the size_change case to obtain a stateid.
2754 *
2755 * Got race?
2756 * Because OPEN is always done by name in nfsv4, it is
2757 * possible that we opened a different file by the same
2758 * name. We can recognize this race condition, but we
2759 * can't do anything about it besides returning an error.
2760 *
2761 * This will be fixed with VFS changes (lookup-intent).
2762 */
2763static int
2764nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2765 struct iattr *sattr)
2766{
08e9eac4 2767 struct inode *inode = dentry->d_inode;
659bfcd6 2768 struct rpc_cred *cred = NULL;
d530838b 2769 struct nfs4_state *state = NULL;
1da177e4
LT		 2770 int status;
2771
8a1636c4 2772 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2773 pnfs_commit_and_return_layout(inode);
8a1636c4 2774
0e574af1 2775 nfs_fattr_init(fattr);
1da177e4 2776
2669940d
AA		 2777 /* Deal with open(O_TRUNC) */
2778 if (sattr->ia_valid & ATTR_OPEN)
2779 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2780
2781 /* Optimization: if the end result is no change, don't RPC */
2782 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2783 return 0;
2784
d530838b 2785 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2786 if (sattr->ia_valid & ATTR_FILE) {
2787 struct nfs_open_context *ctx;
2788
2789 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2790 if (ctx) {
2791 cred = ctx->cred;
2792 state = ctx->state;
2793 }
659bfcd6 2794 }
08e9eac4 2795
659bfcd6 2796 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2797 if (status == 0)
2798 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2799 return status;
2800}
2801
0c2e53f1
TM		 2802static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2803 const struct qstr *name, struct nfs_fh *fhandle,
2804 struct nfs_fattr *fattr)
2b3de441 2805{
0c2e53f1 2806 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2807 int status;
2808 struct nfs4_lookup_arg args = {
2809 .bitmask = server->attr_bitmask,
0c2e53f1 2810 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2811 .name = name,
2812 };
2813 struct nfs4_lookup_res res = {
2814 .server = server,
2815 .fattr = fattr,
2816 .fh = fhandle,
2817 };
2818 struct rpc_message msg = {
2819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2820 .rpc_argp = &args,
2821 .rpc_resp = &res,
2822 };
2823
2824 nfs_fattr_init(fattr);
2825
1da177e4 2826 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2827 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2828 dprintk("NFS reply lookup: %d\n", status);
2829 return status;
2830}
2831
72de53ec 2832static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2833{
7ebb9315 2834 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2835 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2836 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2837 fattr->nlink = 2;
2838}
2839
72de53ec
BS		 2840static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2841 struct qstr *name, struct nfs_fh *fhandle,
2842 struct nfs_fattr *fattr)
1da177e4
LT		 2843{
2844 struct nfs4_exception exception = { };
72de53ec 2845 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2846 int err;
2847 do {
72de53ec
BS		 2848 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2849 switch (err) {
08ef7bd3 2850 case -NFS4ERR_BADNAME:
72de53ec
BS		 2851 err = -ENOENT;
2852 goto out;
0c2e53f1 2853 case -NFS4ERR_MOVED:
f05d147f 2854 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2855 goto out;
0c2e53f1 2856 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2857 err = -EPERM;
2858 if (client != *clnt)
2859 goto out;
2860
2861 client = nfs4_create_sec_client(client, dir, name);
2862 if (IS_ERR(client))
2863 return PTR_ERR(client);
2864
2865 exception.retry = 1;
2866 break;
2867 default:
2868 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2869 }
1da177e4 2870 } while (exception.retry);
72de53ec
BS		 2871
2872out:
2873 if (err == 0)
2874 *clnt = client;
2875 else if (client != *clnt)
2876 rpc_shutdown_client(client);
2877
1da177e4
LT		 2878 return err;
2879}
2880
80a16b21 2881static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2882 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2883{
2884 int status;
2885 struct rpc_clnt *client = NFS_CLIENT(dir);
2886
2887 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2888 if (client != NFS_CLIENT(dir)) {
2889 rpc_shutdown_client(client);
2890 nfs_fixup_secinfo_attributes(fattr);
2891 }
2892 return status;
2893}
2894
f05d147f
BS		 2895struct rpc_clnt *
2896nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2897 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2898{
2899 int status;
2900 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2901
2902 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2903 if (status < 0) {
2904 rpc_shutdown_client(client);
2905 return ERR_PTR(status);
2906 }
2907 return client;
2908}
2909
1da177e4
LT		 2910static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2911{
76b32999 2912 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2913 struct nfs4_accessargs args = {
2914 .fh = NFS_FH(inode),
a4980e78 2915 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2916 };
2917 struct nfs4_accessres res = {
2918 .server = server,
1da177e4 2919 };
1da177e4
LT		 2920 struct rpc_message msg = {
2921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2922 .rpc_argp = &args,
2923 .rpc_resp = &res,
2924 .rpc_cred = entry->cred,
2925 };
2926 int mode = entry->mask;
2927 int status;
2928
2929 /*
2930 * Determine which access bits we want to ask for...
2931 */
2932 if (mode & MAY_READ)
2933 args.access |= NFS4_ACCESS_READ;
2934 if (S_ISDIR(inode->i_mode)) {
2935 if (mode & MAY_WRITE)
2936 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2937 if (mode & MAY_EXEC)
2938 args.access |= NFS4_ACCESS_LOOKUP;
2939 } else {
2940 if (mode & MAY_WRITE)
2941 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2942 if (mode & MAY_EXEC)
2943 args.access |= NFS4_ACCESS_EXECUTE;
2944 }
c407d41a
TM		 2945
2946 res.fattr = nfs_alloc_fattr();
2947 if (res.fattr == NULL)
2948 return -ENOMEM;
2949
7c513058 2950 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2951 if (!status) {
6168f62c 2952 nfs_access_set_mask(entry, res.access);
c407d41a 2953 nfs_refresh_inode(inode, res.fattr);
1da177e4 2954 }
c407d41a 2955 nfs_free_fattr(res.fattr);
1da177e4
LT		 2956 return status;
2957}
2958
2959static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2960{
2961 struct nfs4_exception exception = { };
2962 int err;
2963 do {
2964 err = nfs4_handle_exception(NFS_SERVER(inode),
2965 _nfs4_proc_access(inode, entry),
2966 &exception);
2967 } while (exception.retry);
2968 return err;
2969}
2970
2971/*
2972 * TODO: For the time being, we don't try to get any attributes
2973 * along with any of the zero-copy operations READ, READDIR,
2974 * READLINK, WRITE.
2975 *
2976 * In the case of the first three, we want to put the GETATTR
2977 * after the read-type operation -- this is because it is hard
2978 * to predict the length of a GETATTR response in v4, and thus
2979 * align the READ data correctly. This means that the GETATTR
2980 * may end up partially falling into the page cache, and we should
2981 * shift it into the 'tail' of the xdr_buf before processing.
2982 * To do this efficiently, we need to know the total length
2983 * of data received, which doesn't seem to be available outside
2984 * of the RPC layer.
2985 *
2986 * In the case of WRITE, we also want to put the GETATTR after
2987 * the operation -- in this case because we want to make sure
140150db 2988 * we get the post-operation mtime and size.
1da177e4
LT		 2989 *
2990 * Both of these changes to the XDR layer would in fact be quite
2991 * minor, but I decided to leave them for a subsequent patch.
2992 */
2993static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2994 unsigned int pgbase, unsigned int pglen)
2995{
2996 struct nfs4_readlink args = {
2997 .fh = NFS_FH(inode),
2998 .pgbase = pgbase,
2999 .pglen = pglen,
3000 .pages = &page,
3001 };
f50c7000 3002 struct nfs4_readlink_res res;
1da177e4
LT		 3003 struct rpc_message msg = {
3004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3005 .rpc_argp = &args,
f50c7000 3006 .rpc_resp = &res,
1da177e4
LT		 3007 };
3008
7c513058 3009 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3010}
3011
3012static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3013 unsigned int pgbase, unsigned int pglen)
3014{
3015 struct nfs4_exception exception = { };
3016 int err;
3017 do {
3018 err = nfs4_handle_exception(NFS_SERVER(inode),
3019 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3020 &exception);
3021 } while (exception.retry);
3022 return err;
3023}
3024
1da177e4 3025/*
8867fe58 3026 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3027 */
1da177e4
LT		 3028static int
3029nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3030 int flags)
1da177e4 3031{
8867fe58 3032 struct nfs_open_context *ctx;
1da177e4 3033 struct nfs4_state *state;
1da177e4
LT		 3034 int status = 0;
3035
8867fe58
MS		 3036 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3037 if (IS_ERR(ctx))
3038 return PTR_ERR(ctx);
3039
a8a5da99 3040 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 3041 state = nfs4_do_open(dir, dentry, ctx->mode,
3042 flags, sattr, ctx->cred,
3043 &ctx->mdsthreshold);
d4d9cdcb 3044 d_drop(dentry);
1da177e4
LT		 3045 if (IS_ERR(state)) {
3046 status = PTR_ERR(state);
c0204fd2 3047 goto out;
1da177e4 3048 }
d4d9cdcb 3049 d_add(dentry, igrab(state->inode));
d75340cc 3050 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3051 ctx->state = state;
1da177e4 3052out:
8867fe58 3053 put_nfs_open_context(ctx);
1da177e4
LT		 3054 return status;
3055}
3056
3057static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3058{
16e42959 3059 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3060 struct nfs_removeargs args = {
1da177e4 3061 .fh = NFS_FH(dir),
26fe5750 3062 .name = *name,
16e42959 3063 };
4fdc17b2 3064 struct nfs_removeres res = {
16e42959 3065 .server = server,
1da177e4 3066 };
1da177e4 3067 struct rpc_message msg = {
4fdc17b2
TM		 3068 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3069 .rpc_argp = &args,
3070 .rpc_resp = &res,
1da177e4 3071 };
778d2817 3072 int status;
1da177e4 3073
7c513058 3074 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3075 if (status == 0)
16e42959 3076 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3077 return status;
3078}
3079
3080static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3081{
3082 struct nfs4_exception exception = { };
3083 int err;
3084 do {
3085 err = nfs4_handle_exception(NFS_SERVER(dir),
3086 _nfs4_proc_remove(dir, name),
3087 &exception);
3088 } while (exception.retry);
3089 return err;
3090}
3091
e4eff1a6 3092static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3093{
e4eff1a6
TM		 3094 struct nfs_server *server = NFS_SERVER(dir);
3095 struct nfs_removeargs *args = msg->rpc_argp;
3096 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3097
e4eff1a6 3098 res->server = server;
1da177e4 3099 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3100 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3101}
3102
34e137cc
BS		 3103static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3104{
d9afbd1b
TM		 3105 nfs4_setup_sequence(NFS_SERVER(data->dir),
3106 &data->args.seq_args,
3107 &data->res.seq_res,
3108 task);
1da177e4
LT		 3109}
3110
e4eff1a6 3111static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3112{
e4eff1a6
TM		 3113 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3114
14516c3a
TM		 3115 if (!nfs4_sequence_done(task, &res->seq_res))
3116 return 0;
9e33bed5 3117 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3118 return 0;
3119 update_changeattr(dir, &res->cinfo);
e4eff1a6 3120 return 1;
1da177e4
LT		 3121}
3122
d3d4152a
JL		 3123static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3124{
3125 struct nfs_server *server = NFS_SERVER(dir);
3126 struct nfs_renameargs *arg = msg->rpc_argp;
3127 struct nfs_renameres *res = msg->rpc_resp;
3128
3129 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3130 res->server = server;
9d12b216 3131 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3132}
3133
c6bfa1a1
BS		 3134static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3135{
d9afbd1b
TM		 3136 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3137 &data->args.seq_args,
3138 &data->res.seq_res,
3139 task);
d3d4152a
JL		 3140}
3141
3142static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3143 struct inode *new_dir)
3144{
3145 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3146
3147 if (!nfs4_sequence_done(task, &res->seq_res))
3148 return 0;
3149 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3150 return 0;
3151
3152 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3153 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3154 return 1;
3155}
3156
1da177e4
LT		 3157static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3158 struct inode *new_dir, struct qstr *new_name)
3159{
6caf2c82 3160 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3161 struct nfs_renameargs arg = {
1da177e4
LT		 3162 .old_dir = NFS_FH(old_dir),
3163 .new_dir = NFS_FH(new_dir),
3164 .old_name = old_name,
3165 .new_name = new_name,
6caf2c82 3166 };
e8582a8b 3167 struct nfs_renameres res = {
6caf2c82 3168 .server = server,
1da177e4 3169 };
1da177e4
LT		 3170 struct rpc_message msg = {
3171 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3172 .rpc_argp = &arg,
3173 .rpc_resp = &res,
3174 };
011fff72 3175 int status = -ENOMEM;
1da177e4 3176
7c513058 3177 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3178 if (!status) {
3179 update_changeattr(old_dir, &res.old_cinfo);
3180 update_changeattr(new_dir, &res.new_cinfo);
3181 }
3182 return status;
3183}
3184
3185static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3186 struct inode *new_dir, struct qstr *new_name)
3187{
3188 struct nfs4_exception exception = { };
3189 int err;
3190 do {
3191 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3192 _nfs4_proc_rename(old_dir, old_name,
3193 new_dir, new_name),
3194 &exception);
3195 } while (exception.retry);
3196 return err;
3197}
3198
3199static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3200{
91ba2eee 3201 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3202 struct nfs4_link_arg arg = {
3203 .fh = NFS_FH(inode),
3204 .dir_fh = NFS_FH(dir),
3205 .name = name,
91ba2eee
TM		 3206 .bitmask = server->attr_bitmask,
3207 };
91ba2eee
TM		 3208 struct nfs4_link_res res = {
3209 .server = server,
1da177e4 3210 };
1da177e4
LT		 3211 struct rpc_message msg = {
3212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3213 .rpc_argp = &arg,
91ba2eee 3214 .rpc_resp = &res,
1da177e4 3215 };
136f2627
TM		 3216 int status = -ENOMEM;
3217
3218 res.fattr = nfs_alloc_fattr();
778d2817 3219 if (res.fattr == NULL)
136f2627 3220 goto out;
1da177e4 3221
7c513058 3222 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3223 if (!status) {
3224 update_changeattr(dir, &res.cinfo);
73a3d07c 3225 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3226 }
136f2627 3227out:
136f2627 3228 nfs_free_fattr(res.fattr);
1da177e4
LT		 3229 return status;
3230}
3231
3232static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3233{
3234 struct nfs4_exception exception = { };
3235 int err;
3236 do {
3237 err = nfs4_handle_exception(NFS_SERVER(inode),
3238 _nfs4_proc_link(inode, dir, name),
3239 &exception);
3240 } while (exception.retry);
3241 return err;
3242}
3243
57dc9a57
TM		 3244struct nfs4_createdata {
3245 struct rpc_message msg;
3246 struct nfs4_create_arg arg;
3247 struct nfs4_create_res res;
3248 struct nfs_fh fh;
3249 struct nfs_fattr fattr;
57dc9a57
TM		 3250};
3251
3252static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3253 struct qstr *name, struct iattr *sattr, u32 ftype)
3254{
3255 struct nfs4_createdata *data;
3256
3257 data = kzalloc(sizeof(*data), GFP_KERNEL);
3258 if (data != NULL) {
3259 struct nfs_server *server = NFS_SERVER(dir);
3260
3261 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3262 data->msg.rpc_argp = &data->arg;
3263 data->msg.rpc_resp = &data->res;
3264 data->arg.dir_fh = NFS_FH(dir);
3265 data->arg.server = server;
3266 data->arg.name = name;
3267 data->arg.attrs = sattr;
3268 data->arg.ftype = ftype;
3269 data->arg.bitmask = server->attr_bitmask;
3270 data->res.server = server;
3271 data->res.fh = &data->fh;
3272 data->res.fattr = &data->fattr;
57dc9a57 3273 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3274 }
3275 return data;
3276}
3277
3278static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3279{
7c513058 3280 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3281 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3282 if (status == 0) {
3283 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3284 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3285 }
3286 return status;
3287}
3288
3289static void nfs4_free_createdata(struct nfs4_createdata *data)
3290{
3291 kfree(data);
3292}
3293
4f390c15 3294static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3295 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3296{
57dc9a57
TM		 3297 struct nfs4_createdata *data;
3298 int status = -ENAMETOOLONG;
1da177e4 3299
94a6d753 3300 if (len > NFS4_MAXPATHLEN)
57dc9a57 3301 goto out;
4f390c15 3302
57dc9a57
TM		 3303 status = -ENOMEM;
3304 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3305 if (data == NULL)
3306 goto out;
3307
3308 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3309 data->arg.u.symlink.pages = &page;
3310 data->arg.u.symlink.len = len;
1da177e4 3311
57dc9a57
TM		 3312 status = nfs4_do_create(dir, dentry, data);
3313
3314 nfs4_free_createdata(data);
3315out:
1da177e4
LT		 3316 return status;
3317}
3318
4f390c15 3319static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3320 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3321{
3322 struct nfs4_exception exception = { };
3323 int err;
3324 do {
3325 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3326 _nfs4_proc_symlink(dir, dentry, page,
3327 len, sattr),
1da177e4
LT		 3328 &exception);
3329 } while (exception.retry);
3330 return err;
3331}
3332
3333static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3334 struct iattr *sattr)
3335{
57dc9a57
TM		 3336 struct nfs4_createdata *data;
3337 int status = -ENOMEM;
1da177e4 3338
57dc9a57
TM		 3339 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3340 if (data == NULL)
3341 goto out;
3342
3343 status = nfs4_do_create(dir, dentry, data);
3344
3345 nfs4_free_createdata(data);
3346out:
1da177e4
LT		 3347 return status;
3348}
3349
3350static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3351 struct iattr *sattr)
3352{
3353 struct nfs4_exception exception = { };
3354 int err;
a8a5da99
AK		 3355
3356 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3357 do {
3358 err = nfs4_handle_exception(NFS_SERVER(dir),
3359 _nfs4_proc_mkdir(dir, dentry, sattr),
3360 &exception);
3361 } while (exception.retry);
3362 return err;
3363}
3364
3365static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3366 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3367{
3368 struct inode *dir = dentry->d_inode;
3369 struct nfs4_readdir_arg args = {
3370 .fh = NFS_FH(dir),
56e4ebf8 3371 .pages = pages,
1da177e4
LT		 3372 .pgbase = 0,
3373 .count = count,
96d25e53 3374 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3375 .plus = plus,
1da177e4
LT		 3376 };
3377 struct nfs4_readdir_res res;
3378 struct rpc_message msg = {
3379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3380 .rpc_argp = &args,
3381 .rpc_resp = &res,
3382 .rpc_cred = cred,
3383 };
3384 int status;
3385
3110ff80 3386 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3387 dentry->d_parent->d_name.name,
3388 dentry->d_name.name,
3389 (unsigned long long)cookie);
c3f52af3 3390 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3391 res.pgbase = args.pgbase;
7c513058 3392 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3393 if (status >= 0) {
c3f52af3 3394 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3395 status += args.pgbase;
3396 }
c4812998
TM		 3397
3398 nfs_invalidate_atime(dir);
3399
3110ff80 3400 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3401 return status;
3402}
3403
3404static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3405 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3406{
3407 struct nfs4_exception exception = { };
3408 int err;
3409 do {
3410 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3411 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3412 pages, count, plus),
1da177e4
LT		 3413 &exception);
3414 } while (exception.retry);
3415 return err;
3416}
3417
3418static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3419 struct iattr *sattr, dev_t rdev)
3420{
57dc9a57
TM		 3421 struct nfs4_createdata *data;
3422 int mode = sattr->ia_mode;
3423 int status = -ENOMEM;
1da177e4 3424
57dc9a57
TM		 3425 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3426 if (data == NULL)
3427 goto out;
3428
1da177e4 3429 if (S_ISFIFO(mode))
57dc9a57 3430 data->arg.ftype = NF4FIFO;
1da177e4 3431 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3432 data->arg.ftype = NF4BLK;
3433 data->arg.u.device.specdata1 = MAJOR(rdev);
3434 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3435 }
3436 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3437 data->arg.ftype = NF4CHR;
3438 data->arg.u.device.specdata1 = MAJOR(rdev);
3439 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3440 } else if (!S_ISSOCK(mode)) {
3441 status = -EINVAL;
3442 goto out_free;
1da177e4 3443 }
1da177e4 3444
57dc9a57 3445 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3446out_free:
57dc9a57
TM		 3447 nfs4_free_createdata(data);
3448out:
1da177e4
LT		 3449 return status;
3450}
3451
3452static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3453 struct iattr *sattr, dev_t rdev)
3454{
3455 struct nfs4_exception exception = { };
3456 int err;
a8a5da99
AK		 3457
3458 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3459 do {
3460 err = nfs4_handle_exception(NFS_SERVER(dir),
3461 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3462 &exception);
3463 } while (exception.retry);
3464 return err;
3465}
3466
3467static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3468 struct nfs_fsstat *fsstat)
3469{
3470 struct nfs4_statfs_arg args = {
3471 .fh = fhandle,
3472 .bitmask = server->attr_bitmask,
3473 };
24ad148a
BH		 3474 struct nfs4_statfs_res res = {
3475 .fsstat = fsstat,
3476 };
1da177e4
LT		 3477 struct rpc_message msg = {
3478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3479 .rpc_argp = &args,
24ad148a 3480 .rpc_resp = &res,
1da177e4
LT		 3481 };
3482
0e574af1 3483 nfs_fattr_init(fsstat->fattr);
7c513058 3484 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3485}
3486
3487static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3488{
3489 struct nfs4_exception exception = { };
3490 int err;
3491 do {
3492 err = nfs4_handle_exception(server,
3493 _nfs4_proc_statfs(server, fhandle, fsstat),
3494 &exception);
3495 } while (exception.retry);
3496 return err;
3497}
3498
3499static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3500 struct nfs_fsinfo *fsinfo)
3501{
3502 struct nfs4_fsinfo_arg args = {
3503 .fh = fhandle,
3504 .bitmask = server->attr_bitmask,
3505 };
3dda5e43
BH		 3506 struct nfs4_fsinfo_res res = {
3507 .fsinfo = fsinfo,
3508 };
1da177e4
LT		 3509 struct rpc_message msg = {
3510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3511 .rpc_argp = &args,
3dda5e43 3512 .rpc_resp = &res,
1da177e4
LT		 3513 };
3514
7c513058 3515 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3516}
3517
3518static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3519{
3520 struct nfs4_exception exception = { };
83ca7f5a 3521 unsigned long now = jiffies;
1da177e4
LT		 3522 int err;
3523
3524 do {
83ca7f5a
CL		 3525 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3526 if (err == 0) {
3527 struct nfs_client *clp = server->nfs_client;
3528
3529 spin_lock(&clp->cl_lock);
3530 clp->cl_lease_time = fsinfo->lease_time * HZ;
3531 clp->cl_last_renewal = now;
3532 spin_unlock(&clp->cl_lock);
3533 break;
3534 }
3535 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3536 } while (exception.retry);
3537 return err;
3538}
3539
3540static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3541{
e38eb650
BS		 3542 int error;
3543
0e574af1 3544 nfs_fattr_init(fsinfo->fattr);
e38eb650 3545 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3546 if (error == 0) {
3547 /* block layout checks this! */
3548 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3549 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3550 }
e38eb650
BS		 3551
3552 return error;
1da177e4
LT		 3553}
3554
3555static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3556 struct nfs_pathconf *pathconf)
3557{
3558 struct nfs4_pathconf_arg args = {
3559 .fh = fhandle,
3560 .bitmask = server->attr_bitmask,
3561 };
d45b2989
BH		 3562 struct nfs4_pathconf_res res = {
3563 .pathconf = pathconf,
3564 };
1da177e4
LT		 3565 struct rpc_message msg = {
3566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3567 .rpc_argp = &args,
d45b2989 3568 .rpc_resp = &res,
1da177e4
LT		 3569 };
3570
3571 /* None of the pathconf attributes are mandatory to implement */
3572 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3573 memset(pathconf, 0, sizeof(*pathconf));
3574 return 0;
3575 }
3576
0e574af1 3577 nfs_fattr_init(pathconf->fattr);
7c513058 3578 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3579}
3580
3581static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3582 struct nfs_pathconf *pathconf)
3583{
3584 struct nfs4_exception exception = { };
3585 int err;
3586
3587 do {
3588 err = nfs4_handle_exception(server,
3589 _nfs4_proc_pathconf(server, fhandle, pathconf),
3590 &exception);
3591 } while (exception.retry);
3592 return err;
3593}
3594
5521abfd 3595int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3596 const struct nfs_open_context *ctx,
3597 const struct nfs_lock_context *l_ctx,
3598 fmode_t fmode)
3599{
3600 const struct nfs_lockowner *lockowner = NULL;
3601
3602 if (l_ctx != NULL)
3603 lockowner = &l_ctx->lockowner;
5521abfd 3604 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3605}
3606EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3607
5521abfd
TM		 3608static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3609 const struct nfs_open_context *ctx,
3610 const struct nfs_lock_context *l_ctx,
3611 fmode_t fmode)
3612{
3613 nfs4_stateid current_stateid;
3614
3615 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3616 return false;
3617 return nfs4_stateid_match(stateid, &current_stateid);
3618}
3619
3620static bool nfs4_error_stateid_expired(int err)
3621{
3622 switch (err) {
3623 case -NFS4ERR_DELEG_REVOKED:
3624 case -NFS4ERR_ADMIN_REVOKED:
3625 case -NFS4ERR_BAD_STATEID:
3626 case -NFS4ERR_STALE_STATEID:
3627 case -NFS4ERR_OLD_STATEID:
3628 case -NFS4ERR_OPENMODE:
3629 case -NFS4ERR_EXPIRED:
3630 return true;
3631 }
3632 return false;
3633}
3634
d20581aa
BH		 3635void __nfs4_read_done_cb(struct nfs_read_data *data)
3636{
cd841605 3637 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3638}
3639
cbdabc7f 3640static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3641{
cd841605 3642 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3643
9e33bed5 3644 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3645 rpc_restart_call_prepare(task);
ec06c096 3646 return -EAGAIN;
1da177e4 3647 }
8850df99 3648
d20581aa 3649 __nfs4_read_done_cb(data);
1da177e4 3650 if (task->tk_status > 0)
ec06c096
TM		 3651 renew_lease(server, data->timestamp);
3652 return 0;
1da177e4
LT		 3653}
3654
5521abfd
TM		 3655static bool nfs4_read_stateid_changed(struct rpc_task *task,
3656 struct nfs_readargs *args)
3657{
3658
3659 if (!nfs4_error_stateid_expired(task->tk_status) ||
3660 nfs4_stateid_is_current(&args->stateid,
3661 args->context,
3662 args->lock_context,
3663 FMODE_READ))
3664 return false;
3665 rpc_restart_call_prepare(task);
3666 return true;
3667}
3668
cbdabc7f
AA		 3669static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3670{
3671
3672 dprintk("--> %s\n", __func__);
3673
3674 if (!nfs4_sequence_done(task, &data->res.seq_res))
3675 return -EAGAIN;
5521abfd
TM		 3676 if (nfs4_read_stateid_changed(task, &data->args))
3677 return -EAGAIN;
d20581aa
BH		 3678 return data->read_done_cb ? data->read_done_cb(task, data) :
3679 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3680}
3681
bdc7f021 3682static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3683{
1da177e4 3684 data->timestamp = jiffies;
cbdabc7f 3685 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3686 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3687 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3688}
3689
ea7c3303
BS		 3690static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3691{
9b206149 3692 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3693 &data->args.seq_args,
3694 &data->res.seq_res,
9b206149
TM		 3695 task))
3696 return;
3697 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3698 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3699}
3700
b029bc9b 3701static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3702{
cd841605 3703 struct inode *inode = data->header->inode;
1da177e4 3704
9e33bed5 3705 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3706 rpc_restart_call_prepare(task);
788e7a89 3707 return -EAGAIN;
1da177e4 3708 }
4f9838c7 3709 if (task->tk_status >= 0) {
1da177e4 3710 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3711 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3712 }
788e7a89 3713 return 0;
1da177e4
LT		 3714}
3715
5521abfd
TM		 3716static bool nfs4_write_stateid_changed(struct rpc_task *task,
3717 struct nfs_writeargs *args)
3718{
3719
3720 if (!nfs4_error_stateid_expired(task->tk_status) ||
3721 nfs4_stateid_is_current(&args->stateid,
3722 args->context,
3723 args->lock_context,
3724 FMODE_WRITE))
3725 return false;
3726 rpc_restart_call_prepare(task);
3727 return true;
3728}
3729
b029bc9b
FI		 3730static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3731{
3732 if (!nfs4_sequence_done(task, &data->res.seq_res))
3733 return -EAGAIN;
5521abfd
TM		 3734 if (nfs4_write_stateid_changed(task, &data->args))
3735 return -EAGAIN;
d20581aa
BH		 3736 return data->write_done_cb ? data->write_done_cb(task, data) :
3737 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3738}
3739
5a37f851
TM		 3740static
3741bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3742{
5a37f851
TM		 3743 const struct nfs_pgio_header *hdr = data->header;
3744
3745 /* Don't request attributes for pNFS or O_DIRECT writes */
3746 if (data->ds_clp != NULL || hdr->dreq != NULL)
3747 return false;
3748 /* Otherwise, request attributes if and only if we don't hold
3749 * a delegation
3750 */
011e2a7f 3751 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3752}
a69aef14 3753
bdc7f021 3754static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3755{
cd841605 3756 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3757
5a37f851 3758 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3759 data->args.bitmask = NULL;
3760 data->res.fattr = NULL;
3761 } else
3762 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3763
b029bc9b
FI		 3764 if (!data->write_done_cb)
3765 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3766 data->res.server = server;
1da177e4
LT		 3767 data->timestamp = jiffies;
3768
bdc7f021 3769 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3770 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3771}
3772
c6cb80d0
BS		 3773static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3774{
9b206149 3775 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3776 &data->args.seq_args,
3777 &data->res.seq_res,
9b206149
TM		 3778 task))
3779 return;
3780 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3781 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3782}
3783
0b7c0153 3784static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3785{
d9afbd1b
TM		 3786 nfs4_setup_sequence(NFS_SERVER(data->inode),
3787 &data->args.seq_args,
3788 &data->res.seq_res,
3789 task);
1da177e4
LT		 3790}
3791
0b7c0153 3792static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3793{
1da177e4 3794 struct inode *inode = data->inode;
14516c3a 3795
9e33bed5 3796 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3797 rpc_restart_call_prepare(task);
788e7a89 3798 return -EAGAIN;
1da177e4 3799 }
788e7a89 3800 return 0;
1da177e4
LT		 3801}
3802
0b7c0153 3803static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3804{
3805 if (!nfs4_sequence_done(task, &data->res.seq_res))
3806 return -EAGAIN;
0b7c0153 3807 return data->commit_done_cb(task, data);
5f452431
FI		 3808}
3809
0b7c0153 3810static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3811{
788e7a89 3812 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3813
0b7c0153
FI		 3814 if (data->commit_done_cb == NULL)
3815 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3816 data->res.server = server;
bdc7f021 3817 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3818 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3819}
3820
9bc4e3ca
CL		 3821struct nfs4_renewdata {
3822 struct nfs_client *client;
3823 unsigned long timestamp;
3824};
3825
1da177e4
LT		 3826/*
3827 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3828 * standalone procedure for queueing an asynchronous RENEW.
3829 */
9bc4e3ca 3830static void nfs4_renew_release(void *calldata)
dc96aef9 3831{
9bc4e3ca
CL		 3832 struct nfs4_renewdata *data = calldata;
3833 struct nfs_client *clp = data->client;
dc96aef9 3834
0851de06
AB		 3835 if (atomic_read(&clp->cl_count) > 1)
3836 nfs4_schedule_state_renewal(clp);
3837 nfs_put_client(clp);
9bc4e3ca 3838 kfree(data);
dc96aef9
AB		 3839}
3840
9bc4e3ca 3841static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3842{
9bc4e3ca
CL		 3843 struct nfs4_renewdata *data = calldata;
3844 struct nfs_client *clp = data->client;
3845 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3846
3847 if (task->tk_status < 0) {
95baa25c 3848 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3849 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3850 return;
3851 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3852 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3853 return;
3854 }
3855 nfs4_schedule_path_down_recovery(clp);
1da177e4 3856 }
452e9352 3857 do_renew_lease(clp, timestamp);
1da177e4
LT		 3858}
3859
963d8fe5
TM		 3860static const struct rpc_call_ops nfs4_renew_ops = {
3861 .rpc_call_done = nfs4_renew_done,
dc96aef9 3862 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3863};
3864
2f60ea6b 3865static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3866{
3867 struct rpc_message msg = {
3868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3869 .rpc_argp = clp,
b4454fe1 3870 .rpc_cred = cred,
1da177e4 3871 };
9bc4e3ca 3872 struct nfs4_renewdata *data;
1da177e4 3873
2f60ea6b
TM		 3874 if (renew_flags == 0)
3875 return 0;
0851de06
AB		 3876 if (!atomic_inc_not_zero(&clp->cl_count))
3877 return -EIO;
b569ad34 3878 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3879 if (data == NULL)
3880 return -ENOMEM;
3881 data->client = clp;
3882 data->timestamp = jiffies;
bc7a05ca 3883 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3884 &nfs4_renew_ops, data);
1da177e4
LT		 3885}
3886
8534d4ec 3887static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3888{
3889 struct rpc_message msg = {
3890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3891 .rpc_argp = clp,
b4454fe1 3892 .rpc_cred = cred,
1da177e4
LT		 3893 };
3894 unsigned long now = jiffies;
3895 int status;
3896
bc7a05ca 3897 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3898 if (status < 0)
3899 return status;
452e9352 3900 do_renew_lease(clp, now);
1da177e4
LT		 3901 return 0;
3902}
3903
aa1870af
BF		 3904static inline int nfs4_server_supports_acls(struct nfs_server *server)
3905{
3906 return (server->caps & NFS_CAP_ACLS)
3907 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3908 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3909}
3910
21f498c2
TM		 3911/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3912 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3913 * the stack.
3914 */
21f498c2 3915#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3916
e9e3d724
NH		 3917static int buf_to_pages_noslab(const void *buf, size_t buflen,
3918 struct page **pages, unsigned int *pgbase)
3919{
3920 struct page *newpage, **spages;
3921 int rc = 0;
3922 size_t len;
3923 spages = pages;
3924
3925 do {
21f498c2 3926 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3927 newpage = alloc_page(GFP_KERNEL);
3928
3929 if (newpage == NULL)
3930 goto unwind;
3931 memcpy(page_address(newpage), buf, len);
3932 buf += len;
3933 buflen -= len;
3934 *pages++ = newpage;
3935 rc++;
3936 } while (buflen != 0);
3937
3938 return rc;
3939
3940unwind:
3941 for(; rc > 0; rc--)
3942 __free_page(spages[rc-1]);
3943 return -ENOMEM;
3944}
3945
e50a1c2e
BF		 3946struct nfs4_cached_acl {
3947 int cached;
3948 size_t len;
3e9d4154 3949 char data[0];
e50a1c2e
BF		 3950};
3951
3952static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3953{
3954 struct nfs_inode *nfsi = NFS_I(inode);
3955
3956 spin_lock(&inode->i_lock);
3957 kfree(nfsi->nfs4_acl);
3958 nfsi->nfs4_acl = acl;
3959 spin_unlock(&inode->i_lock);
3960}
3961
3962static void nfs4_zap_acl_attr(struct inode *inode)
3963{
3964 nfs4_set_cached_acl(inode, NULL);
3965}
3966
3967static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3968{
3969 struct nfs_inode *nfsi = NFS_I(inode);
3970 struct nfs4_cached_acl *acl;
3971 int ret = -ENOENT;
3972
3973 spin_lock(&inode->i_lock);
3974 acl = nfsi->nfs4_acl;
3975 if (acl == NULL)
3976 goto out;
3977 if (buf == NULL) /* user is just asking for length */
3978 goto out_len;
3979 if (acl->cached == 0)
3980 goto out;
3981 ret = -ERANGE; /* see getxattr(2) man page */
3982 if (acl->len > buflen)
3983 goto out;
3984 memcpy(buf, acl->data, acl->len);
3985out_len:
3986 ret = acl->len;
3987out:
3988 spin_unlock(&inode->i_lock);
3989 return ret;
3990}
3991
5794d21e 3992static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3993{
3994 struct nfs4_cached_acl *acl;
b291f1b1 3995 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3996
1f1ea6c2 3997 if (buflen <= PAGE_SIZE) {
b291f1b1 3998 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3999 if (acl == NULL)
4000 goto out;
4001 acl->cached = 1;
5794d21e 4002 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4003 } else {
4004 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4005 if (acl == NULL)
4006 goto out;
4007 acl->cached = 0;
4008 }
4009 acl->len = acl_len;
4010out:
4011 nfs4_set_cached_acl(inode, acl);
4012}
4013
bf118a34
AA		 4014/*
4015 * The getxattr API returns the required buffer length when called with a
4016 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4017 * the required buf. On a NULL buf, we send a page of data to the server
4018 * guessing that the ACL request can be serviced by a page. If so, we cache
4019 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4020 * the cache. If not so, we throw away the page, and cache the required
4021 * length. The next getxattr call will then produce another round trip to
4022 * the server, this time with the input buf of the required size.
4023 */
16b4289c 4024static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4025{
bf118a34 4026 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4027 struct nfs_getaclargs args = {
4028 .fh = NFS_FH(inode),
4029 .acl_pages = pages,
4030 .acl_len = buflen,
4031 };
663c79b3
BH		 4032 struct nfs_getaclres res = {
4033 .acl_len = buflen,
4034 };
aa1870af
BF		 4035 struct rpc_message msg = {
4036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4037 .rpc_argp = &args,
663c79b3 4038 .rpc_resp = &res,
aa1870af 4039 };
21f498c2
TM		 4040 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4041 int ret = -ENOMEM, i;
aa1870af 4042
bf118a34
AA		 4043 /* As long as we're doing a round trip to the server anyway,
4044 * let's be prepared for a page of acl data. */
4045 if (npages == 0)
4046 npages = 1;
21f498c2
TM		 4047 if (npages > ARRAY_SIZE(pages))
4048 return -ERANGE;
5a006899 4049
bf118a34
AA		 4050 for (i = 0; i < npages; i++) {
4051 pages[i] = alloc_page(GFP_KERNEL);
4052 if (!pages[i])
4053 goto out_free;
e50a1c2e 4054 }
5a006899
SP		 4055
4056 /* for decoding across pages */
4057 res.acl_scratch = alloc_page(GFP_KERNEL);
4058 if (!res.acl_scratch)
4059 goto out_free;
4060
bf118a34
AA		 4061 args.acl_len = npages * PAGE_SIZE;
4062 args.acl_pgbase = 0;
5a006899 4063
de040bec 4064 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4065 __func__, buf, buflen, npages, args.acl_len);
4066 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4067 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4068 if (ret)
4069 goto out_free;
bf118a34 4070
1f1ea6c2
TM		 4071 /* Handle the case where the passed-in buffer is too short */
4072 if (res.acl_flags & NFS4_ACL_TRUNC) {
4073 /* Did the user only issue a request for the acl length? */
4074 if (buf == NULL)
4075 goto out_ok;
e50a1c2e 4076 ret = -ERANGE;
1f1ea6c2 4077 goto out_free;
e50a1c2e 4078 }
1f1ea6c2 4079 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4080 if (buf) {
4081 if (res.acl_len > buflen) {
4082 ret = -ERANGE;
4083 goto out_free;
4084 }
1f1ea6c2 4085 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4086 }
1f1ea6c2
TM		 4087out_ok:
4088 ret = res.acl_len;
e50a1c2e 4089out_free:
bf118a34
AA		 4090 for (i = 0; i < npages; i++)
4091 if (pages[i])
4092 __free_page(pages[i]);
331818f1
TM		 4093 if (res.acl_scratch)
4094 __free_page(res.acl_scratch);
aa1870af
BF		 4095 return ret;
4096}
4097
16b4289c
TM		 4098static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4099{
4100 struct nfs4_exception exception = { };
4101 ssize_t ret;
4102 do {
4103 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4104 if (ret >= 0)
4105 break;
4106 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4107 } while (exception.retry);
4108 return ret;
4109}
4110
e50a1c2e
BF		 4111static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4112{
4113 struct nfs_server *server = NFS_SERVER(inode);
4114 int ret;
4115
4116 if (!nfs4_server_supports_acls(server))
4117 return -EOPNOTSUPP;
4118 ret = nfs_revalidate_inode(server, inode);
4119 if (ret < 0)
4120 return ret;
08a22b39
AK		 4121 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4122 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4123 ret = nfs4_read_cached_acl(inode, buf, buflen);
4124 if (ret != -ENOENT)
bf118a34
AA		 4125 /* -ENOENT is returned if there is no ACL or if there is an ACL
4126 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4127 return ret;
4128 return nfs4_get_acl_uncached(inode, buf, buflen);
4129}
4130
16b4289c 4131static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4132{
4133 struct nfs_server *server = NFS_SERVER(inode);
4134 struct page *pages[NFS4ACL_MAXPAGES];
4135 struct nfs_setaclargs arg = {
4136 .fh = NFS_FH(inode),
4137 .acl_pages = pages,
4138 .acl_len = buflen,
4139 };
73c403a9 4140 struct nfs_setaclres res;
4b580ee3
BF		 4141 struct rpc_message msg = {
4142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4143 .rpc_argp = &arg,
73c403a9 4144 .rpc_resp = &res,
4b580ee3 4145 };
21f498c2 4146 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4147 int ret, i;
4b580ee3
BF		 4148
4149 if (!nfs4_server_supports_acls(server))
4150 return -EOPNOTSUPP;
21f498c2
TM		 4151 if (npages > ARRAY_SIZE(pages))
4152 return -ERANGE;
e9e3d724
NH		 4153 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4154 if (i < 0)
4155 return i;
57ec14c5 4156 nfs4_inode_return_delegation(inode);
7c513058 4157 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4158
4159 /*
4160 * Free each page after tx, so the only ref left is
4161 * held by the network stack
4162 */
4163 for (; i > 0; i--)
4164 put_page(pages[i-1]);
4165
08a22b39
AK		 4166 /*
4167 * Acl update can result in inode attribute update.
4168 * so mark the attribute cache invalid.
4169 */
4170 spin_lock(&inode->i_lock);
4171 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4172 spin_unlock(&inode->i_lock);
f41f7418
TM		 4173 nfs_access_zap_cache(inode);
4174 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4175 return ret;
4176}
4177
16b4289c
TM		 4178static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4179{
4180 struct nfs4_exception exception = { };
4181 int err;
4182 do {
4183 err = nfs4_handle_exception(NFS_SERVER(inode),
4184 __nfs4_proc_set_acl(inode, buf, buflen),
4185 &exception);
4186 } while (exception.retry);
4187 return err;
4188}
4189
1da177e4 4190static int
aa5190d0 4191nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4192{
aa5190d0
TM		 4193 struct nfs_client *clp = server->nfs_client;
4194
4195 if (task->tk_status >= 0)
1da177e4
LT		 4196 return 0;
4197 switch(task->tk_status) {
a1d0b5ee 4198 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4199 case -NFS4ERR_ADMIN_REVOKED:
4200 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4201 if (state == NULL)
4202 break;
4203 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4204 case -NFS4ERR_OPENMODE:
4205 if (state == NULL)
4206 break;
5d422301
TM		 4207 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4208 goto stateid_invalid;
0400a6b0 4209 goto wait_on_recovery;
0ced63d1 4210 case -NFS4ERR_EXPIRED:
5d422301
TM		 4211 if (state != NULL) {
4212 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4213 goto stateid_invalid;
4214 }
1da177e4 4215 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4216 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4217 nfs4_schedule_lease_recovery(clp);
4218 goto wait_on_recovery;
4745e315
AA		 4219#if defined(CONFIG_NFS_V4_1)
4220 case -NFS4ERR_BADSESSION:
4221 case -NFS4ERR_BADSLOT:
4222 case -NFS4ERR_BAD_HIGH_SLOT:
4223 case -NFS4ERR_DEADSESSION:
4224 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4225 case -NFS4ERR_SEQ_FALSE_RETRY:
4226 case -NFS4ERR_SEQ_MISORDERED:
4227 dprintk("%s ERROR %d, Reset session\n", __func__,
4228 task->tk_status);
9f594791 4229 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4230 task->tk_status = 0;
4231 return -EAGAIN;
4232#endif /* CONFIG_NFS_V4_1 */
1da177e4 4233 case -NFS4ERR_DELAY:
aa5190d0 4234 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4235 case -NFS4ERR_GRACE:
1da177e4
LT		 4236 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4237 task->tk_status = 0;
4238 return -EAGAIN;
a8a4ae3a 4239 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4240 case -NFS4ERR_OLD_STATEID:
4241 task->tk_status = 0;
4242 return -EAGAIN;
4243 }
4244 task->tk_status = nfs4_map_errors(task->tk_status);
4245 return 0;
5d422301
TM		 4246stateid_invalid:
4247 task->tk_status = -EIO;
4248 return 0;
0400a6b0 4249wait_on_recovery:
a2c0b9e2 4250 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4251 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4252 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4253 task->tk_status = 0;
4254 return -EAGAIN;
1da177e4
LT		 4255}
4256
f092075d
CL		 4257static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4258 nfs4_verifier *bootverf)
cd93710e
CL		 4259{
4260 __be32 verf[2];
4261
2c820d9a
CL		 4262 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4263 /* An impossible timestamp guarantees this value
4264 * will never match a generated boot time. */
4265 verf[0] = 0;
4266 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4267 } else {
f092075d
CL		 4268 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4269 verf[0] = (__be32)nn->boot_time.tv_sec;
4270 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4271 }
cd93710e
CL		 4272 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4273}
4274
e984a55a
CL		 4275static unsigned int
4276nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4277 char *buf, size_t len)
4278{
4279 unsigned int result;
4280
4281 rcu_read_lock();
4282 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4283 clp->cl_ipaddr,
4284 rpc_peeraddr2str(clp->cl_rpcclient,
4285 RPC_DISPLAY_ADDR),
4286 rpc_peeraddr2str(clp->cl_rpcclient,
4287 RPC_DISPLAY_PROTO));
4288 rcu_read_unlock();
4289 return result;
4290}
4291
4292static unsigned int
4293nfs4_init_uniform_client_string(const struct nfs_client *clp,
4294 char *buf, size_t len)
4295{
6f2ea7f2
CL		 4296 char *nodename = clp->cl_rpcclient->cl_nodename;
4297
4298 if (nfs4_client_id_uniquifier[0] != '\0')
4299 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4300 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4301 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4302 nodename);
e984a55a
CL		 4303}
4304
6bbb4ae8
CL		 4305/**
4306 * nfs4_proc_setclientid - Negotiate client ID
4307 * @clp: state data structure
4308 * @program: RPC program for NFSv4 callback service
4309 * @port: IP port number for NFS4 callback service
4310 * @cred: RPC credential to use for this call
4311 * @res: where to place the result
4312 *
4313 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4314 */
bb8b27e5
TM		 4315int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4316 unsigned short port, struct rpc_cred *cred,
4317 struct nfs4_setclientid_res *res)
1da177e4
LT		 4318{
4319 nfs4_verifier sc_verifier;
4320 struct nfs4_setclientid setclientid = {
4321 .sc_verifier = &sc_verifier,
4322 .sc_prog = program,
f4eecd5d 4323 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4324 };
4325 struct rpc_message msg = {
4326 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4327 .rpc_argp = &setclientid,
bb8b27e5 4328 .rpc_resp = res,
286d7d6a 4329 .rpc_cred = cred,
1da177e4 4330 };
6bbb4ae8 4331 int status;
1da177e4 4332
de734831 4333 /* nfs_client_id4 */
f092075d 4334 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4335 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4336 setclientid.sc_name_len =
4337 nfs4_init_uniform_client_string(clp,
4338 setclientid.sc_name,
4339 sizeof(setclientid.sc_name));
4340 else
4341 setclientid.sc_name_len =
4342 nfs4_init_nonuniform_client_string(clp,
4343 setclientid.sc_name,
4344 sizeof(setclientid.sc_name));
de734831 4345 /* cb_client4 */
e984a55a 4346 rcu_read_lock();
de734831 4347 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4348 sizeof(setclientid.sc_netid),
4349 rpc_peeraddr2str(clp->cl_rpcclient,
4350 RPC_DISPLAY_NETID));
de734831
CL		 4351 rcu_read_unlock();
4352 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4353 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4354 clp->cl_ipaddr, port >> 8, port & 255);
4355
6bbb4ae8
CL		 4356 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4357 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4358 setclientid.sc_name_len, setclientid.sc_name);
4359 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4360 dprintk("NFS reply setclientid: %d\n", status);
4361 return status;
1da177e4
LT		 4362}
4363
6bbb4ae8
CL		 4364/**
4365 * nfs4_proc_setclientid_confirm - Confirm client ID
4366 * @clp: state data structure
4367 * @res: result of a previous SETCLIENTID
4368 * @cred: RPC credential to use for this call
4369 *
4370 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4371 */
fd954ae1 4372int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4373 struct nfs4_setclientid_res *arg,
4374 struct rpc_cred *cred)
1da177e4 4375{
1da177e4
LT		 4376 struct rpc_message msg = {
4377 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4378 .rpc_argp = arg,
286d7d6a 4379 .rpc_cred = cred,
1da177e4 4380 };
1da177e4
LT		 4381 int status;
4382
6bbb4ae8
CL		 4383 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4384 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4385 clp->cl_clientid);
1bd714f2 4386 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4387 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4388 return status;
4389}
4390
fe650407
TM		 4391struct nfs4_delegreturndata {
4392 struct nfs4_delegreturnargs args;
fa178f29 4393 struct nfs4_delegreturnres res;
fe650407
TM		 4394 struct nfs_fh fh;
4395 nfs4_stateid stateid;
26e976a8 4396 unsigned long timestamp;
fa178f29 4397 struct nfs_fattr fattr;
fe650407
TM		 4398 int rpc_status;
4399};
4400
fe650407
TM		 4401static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4402{
4403 struct nfs4_delegreturndata *data = calldata;
938e1010 4404
14516c3a
TM		 4405 if (!nfs4_sequence_done(task, &data->res.seq_res))
4406 return;
938e1010 4407
79708861
RL		 4408 switch (task->tk_status) {
4409 case -NFS4ERR_STALE_STATEID:
4410 case -NFS4ERR_EXPIRED:
4411 case 0:
fa178f29 4412 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4413 break;
4414 default:
4415 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4416 -EAGAIN) {
d00c5d43 4417 rpc_restart_call_prepare(task);
79708861
RL		 4418 return;
4419 }
4420 }
4421 data->rpc_status = task->tk_status;
fe650407
TM		 4422}
4423
4424static void nfs4_delegreturn_release(void *calldata)
4425{
fe650407
TM		 4426 kfree(calldata);
4427}
4428
938e1010
AA		 4429#if defined(CONFIG_NFS_V4_1)
4430static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4431{
4432 struct nfs4_delegreturndata *d_data;
4433
4434 d_data = (struct nfs4_delegreturndata *)data;
4435
d9afbd1b
TM		 4436 nfs4_setup_sequence(d_data->res.server,
4437 &d_data->args.seq_args,
4438 &d_data->res.seq_res,
4439 task);
938e1010
AA		 4440}
4441#endif /* CONFIG_NFS_V4_1 */
4442
c8d149f3 4443static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4444#if defined(CONFIG_NFS_V4_1)
4445 .rpc_call_prepare = nfs4_delegreturn_prepare,
4446#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4447 .rpc_call_done = nfs4_delegreturn_done,
4448 .rpc_release = nfs4_delegreturn_release,
4449};
4450
e6f81075 4451static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4452{
4453 struct nfs4_delegreturndata *data;
fa178f29 4454 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4455 struct rpc_task *task;
5138fde0
TM		 4456 struct rpc_message msg = {
4457 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4458 .rpc_cred = cred,
4459 };
c970aa85
TM		 4460 struct rpc_task_setup task_setup_data = {
4461 .rpc_client = server->client,
5138fde0 4462 .rpc_message = &msg,
c970aa85
TM		 4463 .callback_ops = &nfs4_delegreturn_ops,
4464 .flags = RPC_TASK_ASYNC,
4465 };
e6f81075 4466 int status = 0;
fe650407 4467
8535b2be 4468 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4469 if (data == NULL)
4470 return -ENOMEM;
9d12b216 4471 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4472 data->args.fhandle = &data->fh;
4473 data->args.stateid = &data->stateid;
9e907fec 4474 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4475 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4476 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4477 data->res.fattr = &data->fattr;
4478 data->res.server = server;
5138fde0 4479 nfs_fattr_init(data->res.fattr);
26e976a8 4480 data->timestamp = jiffies;
fe650407
TM		 4481 data->rpc_status = 0;
4482
c970aa85 4483 task_setup_data.callback_data = data;
1174dd1f
TM		 4484 msg.rpc_argp = &data->args;
4485 msg.rpc_resp = &data->res;
c970aa85 4486 task = rpc_run_task(&task_setup_data);
7a1218a2 4487 if (IS_ERR(task))
fe650407 4488 return PTR_ERR(task);
e6f81075
TM		 4489 if (!issync)
4490 goto out;
fe650407 4491 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4492 if (status != 0)
4493 goto out;
4494 status = data->rpc_status;
e144cbcc
TM		 4495 if (status == 0)
4496 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4497 else
4498 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4499out:
e6b3c4db 4500 rpc_put_task(task);
fe650407 4501 return status;
1da177e4
LT		 4502}
4503
e6f81075 4504int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4505{
4506 struct nfs_server *server = NFS_SERVER(inode);
4507 struct nfs4_exception exception = { };
4508 int err;
4509 do {
e6f81075 4510 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4511 switch (err) {
4512 case -NFS4ERR_STALE_STATEID:
4513 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4514 case 0:
4515 return 0;
4516 }
4517 err = nfs4_handle_exception(server, err, &exception);
4518 } while (exception.retry);
4519 return err;
4520}
4521
4522#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4523#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4524
4525/*
4526 * sleep, with exponential backoff, and retry the LOCK operation.
4527 */
4528static unsigned long
4529nfs4_set_lock_task_retry(unsigned long timeout)
4530{
d310310c 4531 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4532 timeout <<= 1;
4533 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4534 return NFS4_LOCK_MAXTIMEOUT;
4535 return timeout;
4536}
4537
1da177e4
LT		 4538static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4539{
4540 struct inode *inode = state->inode;
4541 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4542 struct nfs_client *clp = server->nfs_client;
911d1aaf 4543 struct nfs_lockt_args arg = {
1da177e4 4544 .fh = NFS_FH(inode),
911d1aaf 4545 .fl = request,
1da177e4 4546 };
911d1aaf
TM		 4547 struct nfs_lockt_res res = {
4548 .denied = request,
1da177e4
LT		 4549 };
4550 struct rpc_message msg = {
4551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4552 .rpc_argp = &arg,
4553 .rpc_resp = &res,
4554 .rpc_cred = state->owner->so_cred,
4555 };
1da177e4
LT		 4556 struct nfs4_lock_state *lsp;
4557 int status;
4558
911d1aaf 4559 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4560 status = nfs4_set_lock_state(state, request);
4561 if (status != 0)
4562 goto out;
4563 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4564 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4565 arg.lock_owner.s_dev = server->s_dev;
7c513058 4566 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4567 switch (status) {
4568 case 0:
4569 request->fl_type = F_UNLCK;
4570 break;
4571 case -NFS4ERR_DENIED:
4572 status = 0;
1da177e4 4573 }
70cc6487 4574 request->fl_ops->fl_release_private(request);
8d0a8a9d 4575out:
1da177e4
LT		 4576 return status;
4577}
4578
4579static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4580{
4581 struct nfs4_exception exception = { };
4582 int err;
4583
4584 do {
4585 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4586 _nfs4_proc_getlk(state, cmd, request),
4587 &exception);
4588 } while (exception.retry);
4589 return err;
4590}
4591
4592static int do_vfs_lock(struct file *file, struct file_lock *fl)
4593{
4594 int res = 0;
4595 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4596 case FL_POSIX:
4597 res = posix_lock_file_wait(file, fl);
4598 break;
4599 case FL_FLOCK:
4600 res = flock_lock_file_wait(file, fl);
4601 break;
4602 default:
4603 BUG();
4604 }
1da177e4
LT		 4605 return res;
4606}
4607
faf5f49c 4608struct nfs4_unlockdata {
911d1aaf
TM		 4609 struct nfs_locku_args arg;
4610 struct nfs_locku_res res;
faf5f49c
TM		 4611 struct nfs4_lock_state *lsp;
4612 struct nfs_open_context *ctx;
911d1aaf
TM		 4613 struct file_lock fl;
4614 const struct nfs_server *server;
26e976a8 4615 unsigned long timestamp;
faf5f49c
TM		 4616};
4617
911d1aaf
TM		 4618static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4619 struct nfs_open_context *ctx,
4620 struct nfs4_lock_state *lsp,
4621 struct nfs_seqid *seqid)
4622{
4623 struct nfs4_unlockdata *p;
4624 struct inode *inode = lsp->ls_state->inode;
4625
8535b2be 4626 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4627 if (p == NULL)
4628 return NULL;
4629 p->arg.fh = NFS_FH(inode);
4630 p->arg.fl = &p->fl;
4631 p->arg.seqid = seqid;
c1d51931 4632 p->res.seqid = seqid;
911d1aaf
TM		 4633 p->arg.stateid = &lsp->ls_stateid;
4634 p->lsp = lsp;
4635 atomic_inc(&lsp->ls_count);
4636 /* Ensure we don't close file until we're done freeing locks! */
4637 p->ctx = get_nfs_open_context(ctx);
4638 memcpy(&p->fl, fl, sizeof(p->fl));
4639 p->server = NFS_SERVER(inode);
4640 return p;
4641}
4642
06f814a3 4643static void nfs4_locku_release_calldata(void *data)
faf5f49c 4644{
963d8fe5 4645 struct nfs4_unlockdata *calldata = data;
911d1aaf 4646 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4647 nfs4_put_lock_state(calldata->lsp);
4648 put_nfs_open_context(calldata->ctx);
4649 kfree(calldata);
faf5f49c
TM		 4650}
4651
963d8fe5 4652static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4653{
963d8fe5 4654 struct nfs4_unlockdata *calldata = data;
faf5f49c 4655
14516c3a
TM		 4656 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4657 return;
faf5f49c
TM		 4658 switch (task->tk_status) {
4659 case 0:
f597c537
TM		 4660 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4661 &calldata->res.stateid);
26e976a8 4662 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4663 break;
9e33bed5
TM		 4664 case -NFS4ERR_BAD_STATEID:
4665 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4666 case -NFS4ERR_STALE_STATEID:
4667 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4668 break;
4669 default:
9e33bed5 4670 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4671 rpc_restart_call_prepare(task);
faf5f49c 4672 }
2b1bc308 4673 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4674}
4675
4ce70ada 4676static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4677{
4ce70ada 4678 struct nfs4_unlockdata *calldata = data;
faf5f49c 4679
911d1aaf 4680 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4681 goto out_wait;
795a88c9 4682 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4683 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4684 goto out_no_action;
faf5f49c 4685 }
26e976a8 4686 calldata->timestamp = jiffies;
035168ab 4687 if (nfs4_setup_sequence(calldata->server,
a893693c 4688 &calldata->arg.seq_args,
2240a9e2
TM		 4689 &calldata->res.seq_res,
4690 task) != 0)
4691 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4692 return;
4693out_no_action:
4694 task->tk_action = NULL;
4695out_wait:
4696 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4697}
4698
963d8fe5 4699static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4700 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4701 .rpc_call_done = nfs4_locku_done,
06f814a3 4702 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4703};
4704
a5d16a4d
TM		 4705static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4706 struct nfs_open_context *ctx,
4707 struct nfs4_lock_state *lsp,
4708 struct nfs_seqid *seqid)
4709{
4710 struct nfs4_unlockdata *data;
5138fde0
TM		 4711 struct rpc_message msg = {
4712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4713 .rpc_cred = ctx->cred,
4714 };
c970aa85
TM		 4715 struct rpc_task_setup task_setup_data = {
4716 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4717 .rpc_message = &msg,
c970aa85 4718 .callback_ops = &nfs4_locku_ops,
101070ca 4719 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4720 .flags = RPC_TASK_ASYNC,
4721 };
a5d16a4d 4722
137d6aca
FF		 4723 /* Ensure this is an unlock - when canceling a lock, the
4724 * canceled lock is passed in, and it won't be an unlock.
4725 */
4726 fl->fl_type = F_UNLCK;
4727
a5d16a4d
TM		 4728 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4729 if (data == NULL) {
4730 nfs_free_seqid(seqid);
4731 return ERR_PTR(-ENOMEM);
4732 }
4733
9d12b216 4734 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4735 msg.rpc_argp = &data->arg;
4736 msg.rpc_resp = &data->res;
c970aa85
TM		 4737 task_setup_data.callback_data = data;
4738 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4739}
4740
faf5f49c
TM		 4741static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4742{
65b62a29
TM		 4743 struct inode *inode = state->inode;
4744 struct nfs4_state_owner *sp = state->owner;
4745 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4746 struct nfs_seqid *seqid;
1da177e4 4747 struct nfs4_lock_state *lsp;
06f814a3
TM		 4748 struct rpc_task *task;
4749 int status = 0;
536ff0f8 4750 unsigned char fl_flags = request->fl_flags;
faf5f49c 4751
8d0a8a9d 4752 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4753 /* Unlock _before_ we do the RPC call */
4754 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4755 /* Exclude nfs_delegation_claim_locks() */
4756 mutex_lock(&sp->so_delegreturn_mutex);
4757 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4758 down_read(&nfsi->rwsem);
4759 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4760 up_read(&nfsi->rwsem);
65b62a29 4761 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4762 goto out;
19e03c57
TM		 4763 }
4764 up_read(&nfsi->rwsem);
65b62a29 4765 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4766 if (status != 0)
9b073574
TM		 4767 goto out;
4768 /* Is this a delegated lock? */
8d0a8a9d 4769 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 4770 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
4771 goto out;
8535b2be 4772 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4773 status = -ENOMEM;
911d1aaf 4774 if (seqid == NULL)
9b073574 4775 goto out;
cd3758e3 4776 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4777 status = PTR_ERR(task);
4778 if (IS_ERR(task))
9b073574 4779 goto out;
a5d16a4d 4780 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4781 rpc_put_task(task);
9b073574 4782out:
536ff0f8 4783 request->fl_flags = fl_flags;
1da177e4
LT		 4784 return status;
4785}
4786
a5d16a4d
TM		 4787struct nfs4_lockdata {
4788 struct nfs_lock_args arg;
4789 struct nfs_lock_res res;
4790 struct nfs4_lock_state *lsp;
4791 struct nfs_open_context *ctx;
4792 struct file_lock fl;
26e976a8 4793 unsigned long timestamp;
a5d16a4d
TM		 4794 int rpc_status;
4795 int cancelled;
66179efe 4796 struct nfs_server *server;
a5d16a4d
TM		 4797};
4798
4799static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4800 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4801 gfp_t gfp_mask)
1da177e4 4802{
a5d16a4d
TM		 4803 struct nfs4_lockdata *p;
4804 struct inode *inode = lsp->ls_state->inode;
1da177e4 4805 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4806
8535b2be 4807 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4808 if (p == NULL)
4809 return NULL;
4810
4811 p->arg.fh = NFS_FH(inode);
4812 p->arg.fl = &p->fl;
8535b2be 4813 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4814 if (p->arg.open_seqid == NULL)
4815 goto out_free;
8535b2be 4816 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4817 if (p->arg.lock_seqid == NULL)
2f74c0a0 4818 goto out_free_seqid;
a5d16a4d 4819 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4820 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4821 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4822 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4823 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4824 p->lsp = lsp;
66179efe 4825 p->server = server;
a5d16a4d
TM		 4826 atomic_inc(&lsp->ls_count);
4827 p->ctx = get_nfs_open_context(ctx);
4828 memcpy(&p->fl, fl, sizeof(p->fl));
4829 return p;
2f74c0a0
TM		 4830out_free_seqid:
4831 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4832out_free:
4833 kfree(p);
4834 return NULL;
4835}
4836
4837static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4838{
4839 struct nfs4_lockdata *data = calldata;
4840 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4841
3110ff80 4842 dprintk("%s: begin!\n", __func__);
2f74c0a0 4843 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4844 goto out_wait;
a5d16a4d
TM		 4845 /* Do we need to do an open_to_lock_owner? */
4846 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4847 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4848 goto out_release_lock_seqid;
8fe72bac 4849 }
8e472f33 4850 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4851 data->arg.new_lock_owner = 1;
c1d51931 4852 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4853 } else
4854 data->arg.new_lock_owner = 0;
5d422301
TM		 4855 if (!nfs4_valid_open_stateid(state)) {
4856 data->rpc_status = -EBADF;
4857 task->tk_action = NULL;
4858 goto out_release_open_seqid;
4859 }
26e976a8 4860 data->timestamp = jiffies;
035168ab
TM		 4861 if (nfs4_setup_sequence(data->server,
4862 &data->arg.seq_args,
2240a9e2 4863 &data->res.seq_res,
d9afbd1b 4864 task) == 0)
66179efe 4865 return;
5d422301 4866out_release_open_seqid:
2240a9e2
TM		 4867 nfs_release_seqid(data->arg.open_seqid);
4868out_release_lock_seqid:
4869 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4870out_wait:
4871 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4872 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4873}
4874
a5d16a4d
TM		 4875static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4876{
4877 struct nfs4_lockdata *data = calldata;
4878
3110ff80 4879 dprintk("%s: begin!\n", __func__);
a5d16a4d 4880
14516c3a
TM		 4881 if (!nfs4_sequence_done(task, &data->res.seq_res))
4882 return;
66179efe 4883
a5d16a4d 4884 data->rpc_status = task->tk_status;
a5d16a4d 4885 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4886 if (data->rpc_status == 0)
4887 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4888 else
4889 goto out;
4890 }
4891 if (data->rpc_status == 0) {
f597c537 4892 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4893 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4894 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4895 }
a5d16a4d 4896out:
3110ff80 4897 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4898}
4899
4900static void nfs4_lock_release(void *calldata)
4901{
4902 struct nfs4_lockdata *data = calldata;
4903
3110ff80 4904 dprintk("%s: begin!\n", __func__);
2f74c0a0 4905 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4906 if (data->cancelled != 0) {
4907 struct rpc_task *task;
4908 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4909 data->arg.lock_seqid);
4910 if (!IS_ERR(task))
bf294b41 4911 rpc_put_task_async(task);
3110ff80 4912 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4913 } else
4914 nfs_free_seqid(data->arg.lock_seqid);
4915 nfs4_put_lock_state(data->lsp);
4916 put_nfs_open_context(data->ctx);
4917 kfree(data);
3110ff80 4918 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4919}
4920
4921static const struct rpc_call_ops nfs4_lock_ops = {
4922 .rpc_call_prepare = nfs4_lock_prepare,
4923 .rpc_call_done = nfs4_lock_done,
4924 .rpc_release = nfs4_lock_release,
4925};
4926
2bee72a6
TM		 4927static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4928{
2bee72a6
TM		 4929 switch (error) {
4930 case -NFS4ERR_ADMIN_REVOKED:
4931 case -NFS4ERR_BAD_STATEID:
ecac799a 4932 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4933 if (new_lock_owner != 0 ||
795a88c9 4934 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4935 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4936 break;
4937 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4938 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4939 case -NFS4ERR_EXPIRED:
4940 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4941 };
4942}
4943
afe6c27c 4944static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4945{
4946 struct nfs4_lockdata *data;
4947 struct rpc_task *task;
5138fde0
TM		 4948 struct rpc_message msg = {
4949 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4950 .rpc_cred = state->owner->so_cred,
4951 };
c970aa85
TM		 4952 struct rpc_task_setup task_setup_data = {
4953 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4954 .rpc_message = &msg,
c970aa85 4955 .callback_ops = &nfs4_lock_ops,
101070ca 4956 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4957 .flags = RPC_TASK_ASYNC,
4958 };
a5d16a4d
TM		 4959 int ret;
4960
3110ff80 4961 dprintk("%s: begin!\n", __func__);
cd3758e3 4962 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4963 fl->fl_u.nfs4_fl.owner,
4964 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4965 if (data == NULL)
4966 return -ENOMEM;
4967 if (IS_SETLKW(cmd))
4968 data->arg.block = 1;
9d12b216 4969 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4970 msg.rpc_argp = &data->arg;
4971 msg.rpc_resp = &data->res;
c970aa85 4972 task_setup_data.callback_data = data;
8fe72bac
TM		 4973 if (recovery_type > NFS_LOCK_NEW) {
4974 if (recovery_type == NFS_LOCK_RECLAIM)
4975 data->arg.reclaim = NFS_LOCK_RECLAIM;
4976 nfs4_set_sequence_privileged(&data->arg.seq_args);
4977 }
c970aa85 4978 task = rpc_run_task(&task_setup_data);
7a1218a2 4979 if (IS_ERR(task))
a5d16a4d 4980 return PTR_ERR(task);
a5d16a4d
TM		 4981 ret = nfs4_wait_for_completion_rpc_task(task);
4982 if (ret == 0) {
4983 ret = data->rpc_status;
2bee72a6
TM		 4984 if (ret)
4985 nfs4_handle_setlk_error(data->server, data->lsp,
4986 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4987 } else
4988 data->cancelled = 1;
e6b3c4db 4989 rpc_put_task(task);
3110ff80 4990 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4991 return ret;
1da177e4
LT		 4992}
4993
4994static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4995{
202b50dc 4996 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4997 struct nfs4_exception exception = {
4998 .inode = state->inode,
4999 };
202b50dc
TM		 5000 int err;
5001
5002 do {
42a2d13e
TM		 5003 /* Cache the lock if possible... */
5004 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5005 return 0;
afe6c27c 5006 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5007 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5008 break;
5009 nfs4_handle_exception(server, err, &exception);
5010 } while (exception.retry);
5011 return err;
1da177e4
LT		 5012}
5013
5014static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5015{
202b50dc 5016 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5017 struct nfs4_exception exception = {
5018 .inode = state->inode,
5019 };
202b50dc
TM		 5020 int err;
5021
6bfc93ef
TM		 5022 err = nfs4_set_lock_state(state, request);
5023 if (err != 0)
5024 return err;
202b50dc 5025 do {
42a2d13e
TM		 5026 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5027 return 0;
afe6c27c 5028 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5029 switch (err) {
5030 default:
5031 goto out;
5032 case -NFS4ERR_GRACE:
5033 case -NFS4ERR_DELAY:
5034 nfs4_handle_exception(server, err, &exception);
5035 err = 0;
5036 }
202b50dc 5037 } while (exception.retry);
a9ed2e25 5038out:
202b50dc 5039 return err;
1da177e4
LT		 5040}
5041
f062eb6c 5042#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5043/**
5044 * nfs41_check_expired_locks - possibly free a lock stateid
5045 *
5046 * @state: NFSv4 state for an inode
5047 *
5048 * Returns NFS_OK if recovery for this stateid is now finished.
5049 * Otherwise a negative NFS4ERR value is returned.
5050 */
b01dd1d8 5051static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5052{
eb64cf96 5053 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5054 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5055 struct nfs_server *server = NFS_SERVER(state->inode);
5056
b01dd1d8 5057 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5058 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 5059 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5060 if (status != NFS_OK) {
3e60ffdd
CL		 5061 /* Free the stateid unless the server
5062 * informs us the stateid is unrecognized. */
89af2739
CL		 5063 if (status != -NFS4ERR_BAD_STATEID)
5064 nfs41_free_stateid(server,
5065 &lsp->ls_stateid);
795a88c9 5066 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5067 ret = status;
5068 }
5069 }
5070 };
5071
5072 return ret;
5073}
5074
5075static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5076{
5077 int status = NFS_OK;
5078
5079 if (test_bit(LK_STATE_IN_USE, &state->flags))
5080 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5081 if (status != NFS_OK)
5082 status = nfs4_lock_expired(state, request);
5083 return status;
f062eb6c
BS		 5084}
5085#endif
5086
1da177e4
LT		 5087static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5088{
9a99af49 5089 struct nfs4_state_owner *sp = state->owner;
19e03c57 5090 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5091 unsigned char fl_flags = request->fl_flags;
9a99af49 5092 unsigned int seq;
8e469ebd 5093 int status = -ENOLCK;
1da177e4 5094
8e469ebd
TM		 5095 if ((fl_flags & FL_POSIX) &&
5096 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5097 goto out;
6bfc93ef 5098 /* Is this a delegated open? */
6bfc93ef
TM		 5099 status = nfs4_set_lock_state(state, request);
5100 if (status != 0)
5101 goto out;
01c3b861
TM		 5102 request->fl_flags |= FL_ACCESS;
5103 status = do_vfs_lock(request->fl_file, request);
5104 if (status < 0)
5105 goto out;
19e03c57 5106 down_read(&nfsi->rwsem);
01c3b861 5107 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5108 /* Yes: cache locks! */
01c3b861 5109 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5110 request->fl_flags = fl_flags & ~FL_SLEEP;
5111 status = do_vfs_lock(request->fl_file, request);
5112 goto out_unlock;
01c3b861 5113 }
9a99af49
TM		 5114 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5115 up_read(&nfsi->rwsem);
afe6c27c 5116 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5117 if (status != 0)
9a99af49
TM		 5118 goto out;
5119 down_read(&nfsi->rwsem);
5120 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5121 status = -NFS4ERR_DELAY;
01c3b861 5122 goto out_unlock;
9a99af49 5123 }
6bfc93ef 5124 /* Note: we always want to sleep here! */
01c3b861 5125 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5126 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5127 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5128 "manager!\n", __func__);
01c3b861 5129out_unlock:
19e03c57 5130 up_read(&nfsi->rwsem);
01c3b861
TM		 5131out:
5132 request->fl_flags = fl_flags;
1da177e4
LT		 5133 return status;
5134}
5135
5136static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5137{
a1d0b5ee
TM		 5138 struct nfs4_exception exception = {
5139 .state = state,
05ffe24f 5140 .inode = state->inode,
a1d0b5ee 5141 };
1da177e4
LT		 5142 int err;
5143
5144 do {
965b5d67
TM		 5145 err = _nfs4_proc_setlk(state, cmd, request);
5146 if (err == -NFS4ERR_DENIED)
5147 err = -EAGAIN;
1da177e4 5148 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5149 err, &exception);
1da177e4
LT		 5150 } while (exception.retry);
5151 return err;
5152}
5153
5154static int
5155nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5156{
5157 struct nfs_open_context *ctx;
5158 struct nfs4_state *state;
5159 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5160 int status;
5161
5162 /* verify open state */
cd3758e3 5163 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5164 state = ctx->state;
5165
5166 if (request->fl_start < 0 || request->fl_end < 0)
5167 return -EINVAL;
5168
d953126a
TM		 5169 if (IS_GETLK(cmd)) {
5170 if (state != NULL)
5171 return nfs4_proc_getlk(state, F_GETLK, request);
5172 return 0;
5173 }
1da177e4
LT		 5174
5175 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5176 return -EINVAL;
5177
d953126a
TM		 5178 if (request->fl_type == F_UNLCK) {
5179 if (state != NULL)
5180 return nfs4_proc_unlck(state, cmd, request);
5181 return 0;
5182 }
1da177e4 5183
d953126a
TM		 5184 if (state == NULL)
5185 return -ENOLCK;
55725513
TM		 5186 /*
5187 * Don't rely on the VFS having checked the file open mode,
5188 * since it won't do this for flock() locks.
5189 */
f44106e2 5190 switch (request->fl_type) {
55725513
TM		 5191 case F_RDLCK:
5192 if (!(filp->f_mode & FMODE_READ))
5193 return -EBADF;
5194 break;
5195 case F_WRLCK:
5196 if (!(filp->f_mode & FMODE_WRITE))
5197 return -EBADF;
5198 }
5199
1da177e4
LT		 5200 do {
5201 status = nfs4_proc_setlk(state, cmd, request);
5202 if ((status != -EAGAIN) || IS_SETLK(cmd))
5203 break;
5204 timeout = nfs4_set_lock_task_retry(timeout);
5205 status = -ERESTARTSYS;
5206 if (signalled())
5207 break;
5208 } while(status < 0);
1da177e4
LT		 5209 return status;
5210}
5211
db4f2e63 5212int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5213{
5214 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5215 int err;
5216
5217 err = nfs4_set_lock_state(state, fl);
5218 if (err != 0)
db4f2e63 5219 return err;
4a706fa0 5220 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5221 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5222}
6b3b5496 5223
cf470c3e
TM		 5224struct nfs_release_lockowner_data {
5225 struct nfs4_lock_state *lsp;
5ae67c4f 5226 struct nfs_server *server;
cf470c3e
TM		 5227 struct nfs_release_lockowner_args args;
5228};
5229
d3c7b7cc
TM		 5230static void nfs4_release_lockowner_release(void *calldata)
5231{
cf470c3e 5232 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5233 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5234 kfree(calldata);
5235}
5236
17280175 5237static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5238 .rpc_release = nfs4_release_lockowner_release,
5239};
5240
c8b2d0bf 5241static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5242{
cf470c3e 5243 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5244 struct rpc_message msg = {
5245 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5246 };
5247
5248 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5249 return -EINVAL;
5250 data = kmalloc(sizeof(*data), GFP_NOFS);
5251 if (!data)
5252 return -ENOMEM;
5253 data->lsp = lsp;
5ae67c4f 5254 data->server = server;
cf470c3e
TM		 5255 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5256 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5257 data->args.lock_owner.s_dev = server->s_dev;
5258 msg.rpc_argp = &data->args;
5259 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5260 return 0;
d3c7b7cc
TM		 5261}
5262
aa1870af
BF		 5263#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5264
64c2ce8b
AK		 5265static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5266 const void *buf, size_t buflen,
5267 int flags, int type)
6b3b5496 5268{
64c2ce8b
AK		 5269 if (strcmp(key, "") != 0)
5270 return -EINVAL;
4b580ee3 5271
64c2ce8b 5272 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5273}
5274
64c2ce8b
AK		 5275static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5276 void *buf, size_t buflen, int type)
6b3b5496 5277{
64c2ce8b
AK		 5278 if (strcmp(key, "") != 0)
5279 return -EINVAL;
aa1870af 5280
64c2ce8b 5281 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5282}
5283
64c2ce8b
AK		 5284static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5285 size_t list_len, const char *name,
5286 size_t name_len, int type)
6b3b5496 5287{
64c2ce8b 5288 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5289
096455a2
BF		 5290 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5291 return 0;
64c2ce8b
AK		 5292
5293 if (list && len <= list_len)
5294 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5295 return len;
6b3b5496
BF		 5296}
5297
533eb461
AA		 5298/*
5299 * nfs_fhget will use either the mounted_on_fileid or the fileid
5300 */
69aaaae1
TM		 5301static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5302{
533eb461
AA		 5303 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5304 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5305 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5306 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5307 return;
5308
5309 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5310 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5311 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5312 fattr->nlink = 2;
5313}
5314
f05d147f
BS		 5315static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5316 const struct qstr *name,
5317 struct nfs4_fs_locations *fs_locations,
5318 struct page *page)
683b57b4
TM		 5319{
5320 struct nfs_server *server = NFS_SERVER(dir);
5321 u32 bitmask[2] = {
361e624f 5322 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5323 };
5324 struct nfs4_fs_locations_arg args = {
5325 .dir_fh = NFS_FH(dir),
c228fd3a 5326 .name = name,
683b57b4
TM		 5327 .page = page,
5328 .bitmask = bitmask,
5329 };
22958463
BH		 5330 struct nfs4_fs_locations_res res = {
5331 .fs_locations = fs_locations,
5332 };
683b57b4
TM		 5333 struct rpc_message msg = {
5334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5335 .rpc_argp = &args,
22958463 5336 .rpc_resp = &res,
683b57b4
TM		 5337 };
5338 int status;
5339
3110ff80 5340 dprintk("%s: start\n", __func__);
533eb461
AA		 5341
5342 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5343 * is not supported */
5344 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5345 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5346 else
5347 bitmask[0] |= FATTR4_WORD0_FILEID;
5348
c228fd3a 5349 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5350 fs_locations->server = server;
830b8e33 5351 fs_locations->nlocations = 0;
f05d147f 5352 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5353 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5354 return status;
5355}
5356
f05d147f
BS		 5357int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5358 const struct qstr *name,
5359 struct nfs4_fs_locations *fs_locations,
5360 struct page *page)
db0a9593
BS		 5361{
5362 struct nfs4_exception exception = { };
5363 int err;
5364 do {
5365 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5366 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5367 &exception);
5368 } while (exception.retry);
5369 return err;
5370}
5371
5a5ea0d4
BS		 5372static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5373{
5374 int status;
5375 struct nfs4_secinfo_arg args = {
5376 .dir_fh = NFS_FH(dir),
5377 .name = name,
5378 };
5379 struct nfs4_secinfo_res res = {
5380 .flavors = flavors,
5381 };
5382 struct rpc_message msg = {
5383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5384 .rpc_argp = &args,
5385 .rpc_resp = &res,
5386 };
5387
5388 dprintk("NFS call secinfo %s\n", name->name);
5389 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5390 dprintk("NFS reply secinfo: %d\n", status);
5391 return status;
5392}
5393
72de53ec
BS		 5394int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5395 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5396{
5397 struct nfs4_exception exception = { };
5398 int err;
5399 do {
5400 err = nfs4_handle_exception(NFS_SERVER(dir),
5401 _nfs4_proc_secinfo(dir, name, flavors),
5402 &exception);
5403 } while (exception.retry);
5404 return err;
5405}
5406
557134a3 5407#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5408/*
5409 * Check the exchange flags returned by the server for invalid flags, having
5410 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5411 * DS flags set.
5412 */
5413static int nfs4_check_cl_exchange_flags(u32 flags)
5414{
5415 if (flags & ~EXCHGID4_FLAG_MASK_R)
5416 goto out_inval;
5417 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5418 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5419 goto out_inval;
5420 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5421 goto out_inval;
5422 return NFS_OK;
5423out_inval:
5424 return -NFS4ERR_INVAL;
5425}
5426
78fe0f41 5427static bool
79d4e1f0
CL		 5428nfs41_same_server_scope(struct nfs41_server_scope *a,
5429 struct nfs41_server_scope *b)
78fe0f41
WAA		 5430{
5431 if (a->server_scope_sz == b->server_scope_sz &&
5432 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5433 return true;
5434
5435 return false;
5436}
5437
7c44f1ae
WAA		 5438/*
5439 * nfs4_proc_bind_conn_to_session()
5440 *
5441 * The 4.1 client currently uses the same TCP connection for the
5442 * fore and backchannel.
5443 */
2cf047c9 5444int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5445{
5446 int status;
5447 struct nfs41_bind_conn_to_session_res res;
5448 struct rpc_message msg = {
5449 .rpc_proc =
5450 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5451 .rpc_argp = clp,
5452 .rpc_resp = &res,
2cf047c9 5453 .rpc_cred = cred,
7c44f1ae
WAA		 5454 };
5455
5456 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5457
5458 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5459 if (unlikely(res.session == NULL)) {
5460 status = -ENOMEM;
5461 goto out;
5462 }
5463
5464 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5465 if (status == 0) {
5466 if (memcmp(res.session->sess_id.data,
5467 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5468 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5469 status = -EIO;
5470 goto out_session;
5471 }
5472 if (res.dir != NFS4_CDFS4_BOTH) {
5473 dprintk("NFS: %s: Unexpected direction from server\n",
5474 __func__);
5475 status = -EIO;
5476 goto out_session;
5477 }
5478 if (res.use_conn_in_rdma_mode) {
5479 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5480 __func__);
5481 status = -EIO;
5482 goto out_session;
5483 }
5484 }
5485out_session:
5486 kfree(res.session);
5487out:
5488 dprintk("<-- %s status= %d\n", __func__, status);
5489 return status;
5490}
5491
99fe60d0
BH		 5492/*
5493 * nfs4_proc_exchange_id()
5494 *
6bbb4ae8
CL		 5495 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5496 *
99fe60d0
BH		 5497 * Since the clientid has expired, all compounds using sessions
5498 * associated with the stale clientid will be returning
5499 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5500 * be in some phase of session reset.
5501 */
4d643d1d 5502int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5503{
5504 nfs4_verifier verifier;
5505 struct nfs41_exchange_id_args args = {
cd93710e 5506 .verifier = &verifier,
99fe60d0 5507 .client = clp,
357f54d6 5508 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5509 };
5510 struct nfs41_exchange_id_res res = {
32b01310 5511 0
99fe60d0
BH		 5512 };
5513 int status;
5514 struct rpc_message msg = {
5515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5516 .rpc_argp = &args,
5517 .rpc_resp = &res,
5518 .rpc_cred = cred,
5519 };
99fe60d0 5520
f092075d 5521 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5522 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5523 sizeof(args.id));
6bbb4ae8
CL		 5524 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5525 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5526 args.id_len, args.id);
99fe60d0 5527
acdeb69d 5528 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5529 GFP_NOFS);
acdeb69d 5530 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5531 status = -ENOMEM;
5532 goto out;
5533 }
78fe0f41 5534
79d4e1f0 5535 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5536 GFP_NOFS);
177313f1 5537 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5538 status = -ENOMEM;
acdeb69d 5539 goto out_server_owner;
abe9a6d5 5540 }
78fe0f41 5541
bbafffd2 5542 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5543 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5544 status = -ENOMEM;
5545 goto out_server_scope;
5546 }
5547
1bd714f2 5548 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5549 if (status == 0)
32b01310 5550 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5551
acdeb69d 5552 if (status == 0) {
32b01310
TM		 5553 clp->cl_clientid = res.clientid;
5554 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5555 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5556 clp->cl_seqid = res.seqid;
5557
acdeb69d
CL		 5558 kfree(clp->cl_serverowner);
5559 clp->cl_serverowner = res.server_owner;
5560 res.server_owner = NULL;
78fe0f41 5561
7d2ed9ac 5562 /* use the most recent implementation id */
59155546
CL		 5563 kfree(clp->cl_implid);
5564 clp->cl_implid = res.impl_id;
7d2ed9ac 5565
177313f1 5566 if (clp->cl_serverscope != NULL &&
79d4e1f0 5567 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5568 res.server_scope)) {
5569 dprintk("%s: server_scope mismatch detected\n",
5570 __func__);
5571 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5572 kfree(clp->cl_serverscope);
5573 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5574 }
5575
177313f1 5576 if (clp->cl_serverscope == NULL) {
79d4e1f0 5577 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5578 goto out;
5579 }
32b01310
TM		 5580 } else
5581 kfree(res.impl_id);
7d2ed9ac 5582
acdeb69d
CL		 5583out_server_owner:
5584 kfree(res.server_owner);
7d2ed9ac 5585out_server_scope:
abe9a6d5
WAA		 5586 kfree(res.server_scope);
5587out:
177313f1 5588 if (clp->cl_implid != NULL)
6bbb4ae8 5589 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5590 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5591 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5592 clp->cl_implid->date.seconds,
5593 clp->cl_implid->date.nseconds);
6bbb4ae8 5594 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5595 return status;
5596}
5597
66245539
TM		 5598static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5599 struct rpc_cred *cred)
5600{
5601 struct rpc_message msg = {
5602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5603 .rpc_argp = clp,
5604 .rpc_cred = cred,
5605 };
5606 int status;
5607
5608 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5609 if (status)
02c67525 5610 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5611 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5612 return status;
5613}
5614
5615static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5616 struct rpc_cred *cred)
5617{
5618 unsigned int loop;
5619 int ret;
5620
5621 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5622 ret = _nfs4_proc_destroy_clientid(clp, cred);
5623 switch (ret) {
5624 case -NFS4ERR_DELAY:
5625 case -NFS4ERR_CLIENTID_BUSY:
5626 ssleep(1);
5627 break;
5628 default:
5629 return ret;
5630 }
5631 }
5632 return 0;
5633}
5634
5635int nfs4_destroy_clientid(struct nfs_client *clp)
5636{
5637 struct rpc_cred *cred;
5638 int ret = 0;
5639
5640 if (clp->cl_mvops->minor_version < 1)
5641 goto out;
5642 if (clp->cl_exchange_flags == 0)
5643 goto out;
05f4c350
CL		 5644 if (clp->cl_preserve_clid)
5645 goto out;
66245539
TM		 5646 cred = nfs4_get_exchange_id_cred(clp);
5647 ret = nfs4_proc_destroy_clientid(clp, cred);
5648 if (cred)
5649 put_rpccred(cred);
5650 switch (ret) {
5651 case 0:
5652 case -NFS4ERR_STALE_CLIENTID:
5653 clp->cl_exchange_flags = 0;
5654 }
5655out:
5656 return ret;
5657}
5658
2050f0cc
AA		 5659struct nfs4_get_lease_time_data {
5660 struct nfs4_get_lease_time_args *args;
5661 struct nfs4_get_lease_time_res *res;
5662 struct nfs_client *clp;
5663};
5664
5665static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5666 void *calldata)
5667{
2050f0cc
AA		 5668 struct nfs4_get_lease_time_data *data =
5669 (struct nfs4_get_lease_time_data *)calldata;
5670
5671 dprintk("--> %s\n", __func__);
5672 /* just setup sequence, do not trigger session recovery
5673 since we're invoked within one */
d9afbd1b
TM		 5674 nfs41_setup_sequence(data->clp->cl_session,
5675 &data->args->la_seq_args,
5676 &data->res->lr_seq_res,
5677 task);
2050f0cc
AA		 5678 dprintk("<-- %s\n", __func__);
5679}
5680
5681/*
5682 * Called from nfs4_state_manager thread for session setup, so don't recover
5683 * from sequence operation or clientid errors.
5684 */
5685static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5686{
5687 struct nfs4_get_lease_time_data *data =
5688 (struct nfs4_get_lease_time_data *)calldata;
5689
5690 dprintk("--> %s\n", __func__);
14516c3a
TM		 5691 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5692 return;
2050f0cc
AA		 5693 switch (task->tk_status) {
5694 case -NFS4ERR_DELAY:
5695 case -NFS4ERR_GRACE:
5696 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5697 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5698 task->tk_status = 0;
a8a4ae3a
AA		 5699 /* fall through */
5700 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5701 rpc_restart_call_prepare(task);
2050f0cc
AA		 5702 return;
5703 }
2050f0cc
AA		 5704 dprintk("<-- %s\n", __func__);
5705}
5706
17280175 5707static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5708 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5709 .rpc_call_done = nfs4_get_lease_time_done,
5710};
5711
5712int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5713{
5714 struct rpc_task *task;
5715 struct nfs4_get_lease_time_args args;
5716 struct nfs4_get_lease_time_res res = {
5717 .lr_fsinfo = fsinfo,
5718 };
5719 struct nfs4_get_lease_time_data data = {
5720 .args = &args,
5721 .res = &res,
5722 .clp = clp,
5723 };
5724 struct rpc_message msg = {
5725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5726 .rpc_argp = &args,
5727 .rpc_resp = &res,
5728 };
5729 struct rpc_task_setup task_setup = {
5730 .rpc_client = clp->cl_rpcclient,
5731 .rpc_message = &msg,
5732 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5733 .callback_data = &data,
5734 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5735 };
5736 int status;
5737
9d12b216 5738 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5739 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5740 dprintk("--> %s\n", __func__);
5741 task = rpc_run_task(&task_setup);
5742
5743 if (IS_ERR(task))
5744 status = PTR_ERR(task);
5745 else {
5746 status = task->tk_status;
5747 rpc_put_task(task);
5748 }
5749 dprintk("<-- %s return %d\n", __func__, status);
5750
5751 return status;
5752}
5753
fc931582
AA		 5754/*
5755 * Initialize the values to be used by the client in CREATE_SESSION
5756 * If nfs4_init_session set the fore channel request and response sizes,
5757 * use them.
5758 *
5759 * Set the back channel max_resp_sz_cached to zero to force the client to
5760 * always set csa_cachethis to FALSE because the current implementation
5761 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5762 */
5763static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5764{
5765 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5766 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5767 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5768
5769 if (mxrqst_sz == 0)
5770 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5771 if (mxresp_sz == 0)
5772 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5773 /* Fore channel attributes */
fc931582
AA		 5774 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5775 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5776 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5777 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5778
5779 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5780 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5781 __func__,
5782 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5783 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5784
5785 /* Back channel attributes */
fc931582
AA		 5786 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5787 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5788 args->bc_attrs.max_resp_sz_cached = 0;
5789 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5790 args->bc_attrs.max_reqs = 1;
5791
5792 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5793 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5794 __func__,
5795 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5796 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5797 args->bc_attrs.max_reqs);
5798}
5799
43c2e885 5800static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5801{
43c2e885
BF		 5802 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5803 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5804
43c2e885
BF		 5805 if (rcvd->max_resp_sz > sent->max_resp_sz)
5806 return -EINVAL;
5807 /*
5808 * Our requested max_ops is the minimum we need; we're not
5809 * prepared to break up compounds into smaller pieces than that.
5810 * So, no point even trying to continue if the server won't
5811 * cooperate:
5812 */
5813 if (rcvd->max_ops < sent->max_ops)
5814 return -EINVAL;
5815 if (rcvd->max_reqs == 0)
5816 return -EINVAL;
b4b9a0c1
VG		 5817 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5818 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5819 return 0;
8d35301d
AA		 5820}
5821
43c2e885
BF		 5822static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5823{
5824 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5825 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5826
43c2e885
BF		 5827 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5828 return -EINVAL;
5829 if (rcvd->max_resp_sz < sent->max_resp_sz)
5830 return -EINVAL;
5831 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5832 return -EINVAL;
5833 /* These would render the backchannel useless: */
b4b9a0c1 5834 if (rcvd->max_ops != sent->max_ops)
43c2e885 5835 return -EINVAL;
b4b9a0c1 5836 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5837 return -EINVAL;
5838 return 0;
5839}
8d35301d 5840
8d35301d
AA		 5841static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5842 struct nfs4_session *session)
5843{
43c2e885 5844 int ret;
8d35301d 5845
43c2e885
BF		 5846 ret = nfs4_verify_fore_channel_attrs(args, session);
5847 if (ret)
5848 return ret;
5849 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5850}
5851
848f5bda
TM		 5852static int _nfs4_proc_create_session(struct nfs_client *clp,
5853 struct rpc_cred *cred)
fc931582
AA		 5854{
5855 struct nfs4_session *session = clp->cl_session;
5856 struct nfs41_create_session_args args = {
5857 .client = clp,
5858 .cb_program = NFS4_CALLBACK,
5859 };
5860 struct nfs41_create_session_res res = {
5861 .client = clp,
5862 };
5863 struct rpc_message msg = {
5864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5865 .rpc_argp = &args,
5866 .rpc_resp = &res,
848f5bda 5867 .rpc_cred = cred,
fc931582
AA		 5868 };
5869 int status;
5870
5871 nfs4_init_channel_attrs(&args);
0f91421e 5872 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5873
1bd714f2 5874 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5875
43095d39 5876 if (!status) {
8d35301d
AA		 5877 /* Verify the session's negotiated channel_attrs values */
5878 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5879 /* Increment the clientid slot sequence id */
5880 clp->cl_seqid++;
5881 }
5882
5883 return status;
5884}
5885
5886/*
5887 * Issues a CREATE_SESSION operation to the server.
5888 * It is the responsibility of the caller to verify the session is
5889 * expired before calling this routine.
5890 */
848f5bda 5891int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5892{
5893 int status;
5894 unsigned *ptr;
fc931582
AA		 5895 struct nfs4_session *session = clp->cl_session;
5896
5897 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5898
848f5bda 5899 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5900 if (status)
5901 goto out;
5902
aacd5537
AA		 5903 /* Init or reset the session slot tables */
5904 status = nfs4_setup_session_slot_tables(session);
5905 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5906 if (status)
5907 goto out;
5908
5909 ptr = (unsigned *)&session->sess_id.data[0];
5910 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5911 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5912out:
5913 dprintk("<-- %s\n", __func__);
5914 return status;
5915}
5916
0f3e66c6
AA		 5917/*
5918 * Issue the over-the-wire RPC DESTROY_SESSION.
5919 * The caller must serialize access to this routine.
5920 */
848f5bda
TM		 5921int nfs4_proc_destroy_session(struct nfs4_session *session,
5922 struct rpc_cred *cred)
0f3e66c6 5923{
848f5bda
TM		 5924 struct rpc_message msg = {
5925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5926 .rpc_argp = session,
5927 .rpc_cred = cred,
5928 };
0f3e66c6 5929 int status = 0;
0f3e66c6
AA		 5930
5931 dprintk("--> nfs4_proc_destroy_session\n");
5932
5933 /* session is still being setup */
5934 if (session->clp->cl_cons_state != NFS_CS_READY)
5935 return status;
5936
1bd714f2 5937 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5938
5939 if (status)
08106ac7 5940 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5941 "Session has been destroyed regardless...\n", status);
5942
5943 dprintk("<-- nfs4_proc_destroy_session\n");
5944 return status;
5945}
5946
fc01cea9
AA		 5947/*
5948 * Renew the cl_session lease.
5949 */
d5f8d3fe
TM		 5950struct nfs4_sequence_data {
5951 struct nfs_client *clp;
5952 struct nfs4_sequence_args args;
5953 struct nfs4_sequence_res res;
5954};
5955
dc96aef9
AB		 5956static void nfs41_sequence_release(void *data)
5957{
d5f8d3fe
TM		 5958 struct nfs4_sequence_data *calldata = data;
5959 struct nfs_client *clp = calldata->clp;
dc96aef9 5960
7135840f
AB		 5961 if (atomic_read(&clp->cl_count) > 1)
5962 nfs4_schedule_state_renewal(clp);
5963 nfs_put_client(clp);
d5f8d3fe 5964 kfree(calldata);
dc96aef9
AB		 5965}
5966
aa5190d0
TM		 5967static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5968{
5969 switch(task->tk_status) {
5970 case -NFS4ERR_DELAY:
aa5190d0
TM		 5971 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5972 return -EAGAIN;
5973 default:
0400a6b0 5974 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5975 }
5976 return 0;
5977}
5978
dc96aef9 5979static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5980{
d5f8d3fe
TM		 5981 struct nfs4_sequence_data *calldata = data;
5982 struct nfs_client *clp = calldata->clp;
fc01cea9 5983
14516c3a
TM		 5984 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5985 return;
fc01cea9
AA		 5986
5987 if (task->tk_status < 0) {
5988 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5989 if (atomic_read(&clp->cl_count) == 1)
5990 goto out;
fc01cea9 5991
aa5190d0
TM		 5992 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5993 rpc_restart_call_prepare(task);
fc01cea9
AA		 5994 return;
5995 }
5996 }
fc01cea9 5997 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5998out:
fc01cea9
AA		 5999 dprintk("<-- %s\n", __func__);
6000}
6001
6002static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6003{
d5f8d3fe
TM		 6004 struct nfs4_sequence_data *calldata = data;
6005 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6006 struct nfs4_sequence_args *args;
6007 struct nfs4_sequence_res *res;
6008
fc01cea9
AA		 6009 args = task->tk_msg.rpc_argp;
6010 res = task->tk_msg.rpc_resp;
6011
d9afbd1b 6012 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6013}
6014
6015static const struct rpc_call_ops nfs41_sequence_ops = {
6016 .rpc_call_done = nfs41_sequence_call_done,
6017 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6018 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6019};
6020
8fe72bac
TM		 6021static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6022 struct rpc_cred *cred,
6023 bool is_privileged)
fc01cea9 6024{
d5f8d3fe 6025 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6026 struct rpc_message msg = {
6027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6028 .rpc_cred = cred,
6029 };
71ac6da9
TM		 6030 struct rpc_task_setup task_setup_data = {
6031 .rpc_client = clp->cl_rpcclient,
6032 .rpc_message = &msg,
8fe72bac 6033 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6034 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6035 };
fc01cea9 6036
7135840f 6037 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6038 return ERR_PTR(-EIO);
dfb4f309 6039 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6040 if (calldata == NULL) {
7135840f 6041 nfs_put_client(clp);
71ac6da9 6042 return ERR_PTR(-ENOMEM);
fc01cea9 6043 }
9d12b216 6044 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6045 if (is_privileged)
6046 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6047 msg.rpc_argp = &calldata->args;
6048 msg.rpc_resp = &calldata->res;
6049 calldata->clp = clp;
71ac6da9 6050 task_setup_data.callback_data = calldata;
fc01cea9 6051
71ac6da9
TM		 6052 return rpc_run_task(&task_setup_data);
6053}
6054
2f60ea6b 6055static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6056{
6057 struct rpc_task *task;
6058 int ret = 0;
6059
2f60ea6b
TM		 6060 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6061 return 0;
8fe72bac 6062 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6063 if (IS_ERR(task))
6064 ret = PTR_ERR(task);
6065 else
bf294b41 6066 rpc_put_task_async(task);
71ac6da9
TM		 6067 dprintk("<-- %s status=%d\n", __func__, ret);
6068 return ret;
6069}
6070
6071static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6072{
6073 struct rpc_task *task;
6074 int ret;
6075
8fe72bac 6076 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6077 if (IS_ERR(task)) {
6078 ret = PTR_ERR(task);
6079 goto out;
6080 }
6081 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6082 if (!ret) {
6083 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6084
6085 if (task->tk_status == 0)
6086 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6087 ret = task->tk_status;
b4410c2f 6088 }
71ac6da9
TM		 6089 rpc_put_task(task);
6090out:
6091 dprintk("<-- %s status=%d\n", __func__, ret);
6092 return ret;
fc01cea9
AA		 6093}
6094
fce5c838
RL		 6095struct nfs4_reclaim_complete_data {
6096 struct nfs_client *clp;
6097 struct nfs41_reclaim_complete_args arg;
6098 struct nfs41_reclaim_complete_res res;
6099};
6100
6101static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6102{
6103 struct nfs4_reclaim_complete_data *calldata = data;
6104
d9afbd1b
TM		 6105 nfs41_setup_sequence(calldata->clp->cl_session,
6106 &calldata->arg.seq_args,
6107 &calldata->res.seq_res,
6108 task);
fce5c838
RL		 6109}
6110
aa5190d0
TM		 6111static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6112{
6113 switch(task->tk_status) {
6114 case 0:
6115 case -NFS4ERR_COMPLETE_ALREADY:
6116 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6117 break;
6118 case -NFS4ERR_DELAY:
aa5190d0 6119 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6120 /* fall through */
6121 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6122 return -EAGAIN;
6123 default:
0400a6b0 6124 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6125 }
6126 return 0;
6127}
6128
fce5c838
RL		 6129static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6130{
6131 struct nfs4_reclaim_complete_data *calldata = data;
6132 struct nfs_client *clp = calldata->clp;
6133 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6134
6135 dprintk("--> %s\n", __func__);
14516c3a
TM		 6136 if (!nfs41_sequence_done(task, res))
6137 return;
fce5c838 6138
aa5190d0
TM		 6139 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6140 rpc_restart_call_prepare(task);
6141 return;
6142 }
fce5c838
RL		 6143 dprintk("<-- %s\n", __func__);
6144}
6145
6146static void nfs4_free_reclaim_complete_data(void *data)
6147{
6148 struct nfs4_reclaim_complete_data *calldata = data;
6149
6150 kfree(calldata);
6151}
6152
6153static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6154 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6155 .rpc_call_done = nfs4_reclaim_complete_done,
6156 .rpc_release = nfs4_free_reclaim_complete_data,
6157};
6158
6159/*
6160 * Issue a global reclaim complete.
6161 */
6162static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6163{
6164 struct nfs4_reclaim_complete_data *calldata;
6165 struct rpc_task *task;
6166 struct rpc_message msg = {
6167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6168 };
6169 struct rpc_task_setup task_setup_data = {
6170 .rpc_client = clp->cl_rpcclient,
6171 .rpc_message = &msg,
6172 .callback_ops = &nfs4_reclaim_complete_call_ops,
6173 .flags = RPC_TASK_ASYNC,
6174 };
6175 int status = -ENOMEM;
6176
6177 dprintk("--> %s\n", __func__);
8535b2be 6178 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6179 if (calldata == NULL)
6180 goto out;
6181 calldata->clp = clp;
6182 calldata->arg.one_fs = 0;
fce5c838 6183
9d12b216 6184 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6185 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6186 msg.rpc_argp = &calldata->arg;
6187 msg.rpc_resp = &calldata->res;
6188 task_setup_data.callback_data = calldata;
6189 task = rpc_run_task(&task_setup_data);
acf82b85 6190 if (IS_ERR(task)) {
fce5c838 6191 status = PTR_ERR(task);
acf82b85
DC		 6192 goto out;
6193 }
c34c32ea
AA		 6194 status = nfs4_wait_for_completion_rpc_task(task);
6195 if (status == 0)
6196 status = task->tk_status;
fce5c838 6197 rpc_put_task(task);
acf82b85 6198 return 0;
fce5c838
RL		 6199out:
6200 dprintk("<-- %s status=%d\n", __func__, status);
6201 return status;
6202}
b1f69b75
AA		 6203
6204static void
6205nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6206{
6207 struct nfs4_layoutget *lgp = calldata;
c31663d4 6208 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6209 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6210
6211 dprintk("--> %s\n", __func__);
c31663d4
FI		 6212 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6213 * right now covering the LAYOUTGET we are about to send.
6214 * However, that is not so catastrophic, and there seems
6215 * to be no way to prevent it completely.
6216 */
6ba7db34 6217 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6218 &lgp->res.seq_res, task))
b1f69b75 6219 return;
cf7d63f1
FI		 6220 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6221 NFS_I(lgp->args.inode)->layout,
6222 lgp->args.ctx->state)) {
6223 rpc_exit(task, NFS4_OK);
cf7d63f1 6224 }
b1f69b75
AA		 6225}
6226
6227static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6228{
6229 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6230 struct inode *inode = lgp->args.inode;
6231 struct nfs_server *server = NFS_SERVER(inode);
6232 struct pnfs_layout_hdr *lo;
6233 struct nfs4_state *state = NULL;
30005121 6234 unsigned long timeo, giveup;
b1f69b75
AA		 6235
6236 dprintk("--> %s\n", __func__);
6237
6ba7db34 6238 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6239 goto out;
b1f69b75
AA		 6240
6241 switch (task->tk_status) {
6242 case 0:
ee314c2a 6243 goto out;
b1f69b75
AA		 6244 case -NFS4ERR_LAYOUTTRYLATER:
6245 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6246 timeo = rpc_get_timeout(task->tk_client);
6247 giveup = lgp->args.timestamp + timeo;
6248 if (time_after(giveup, jiffies))
6249 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6250 break;
6251 case -NFS4ERR_EXPIRED:
6252 case -NFS4ERR_BAD_STATEID:
6253 spin_lock(&inode->i_lock);
6254 lo = NFS_I(inode)->layout;
6255 if (!lo || list_empty(&lo->plh_segs)) {
6256 spin_unlock(&inode->i_lock);
6257 /* If the open stateid was bad, then recover it. */
6258 state = lgp->args.ctx->state;
6259 } else {
6260 LIST_HEAD(head);
6261
6262 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6263 spin_unlock(&inode->i_lock);
6264 /* Mark the bad layout state as invalid, then
6265 * retry using the open stateid. */
6266 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6267 }
6268 }
ee314c2a
TM		 6269 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6270 rpc_restart_call_prepare(task);
6271out:
b1f69b75
AA		 6272 dprintk("<-- %s\n", __func__);
6273}
6274
8554116e
IK		 6275static size_t max_response_pages(struct nfs_server *server)
6276{
6277 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6278 return nfs_page_array_len(0, max_resp_sz);
6279}
6280
6281static void nfs4_free_pages(struct page **pages, size_t size)
6282{
6283 int i;
6284
6285 if (!pages)
6286 return;
6287
6288 for (i = 0; i < size; i++) {
6289 if (!pages[i])
6290 break;
6291 __free_page(pages[i]);
6292 }
6293 kfree(pages);
6294}
6295
6296static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6297{
6298 struct page **pages;
6299 int i;
6300
6301 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6302 if (!pages) {
6303 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6304 return NULL;
6305 }
6306
6307 for (i = 0; i < size; i++) {
6308 pages[i] = alloc_page(gfp_flags);
6309 if (!pages[i]) {
6310 dprintk("%s: failed to allocate page\n", __func__);
6311 nfs4_free_pages(pages, size);
6312 return NULL;
6313 }
6314 }
6315
6316 return pages;
6317}
6318
b1f69b75
AA		 6319static void nfs4_layoutget_release(void *calldata)
6320{
6321 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6322 struct inode *inode = lgp->args.inode;
6323 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6324 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6325
6326 dprintk("--> %s\n", __func__);
8554116e 6327 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6328 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6329 put_nfs_open_context(lgp->args.ctx);
6330 kfree(calldata);
6331 dprintk("<-- %s\n", __func__);
6332}
6333
6334static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6335 .rpc_call_prepare = nfs4_layoutget_prepare,
6336 .rpc_call_done = nfs4_layoutget_done,
6337 .rpc_release = nfs4_layoutget_release,
6338};
6339
a0b0a6e3
TM		 6340struct pnfs_layout_segment *
6341nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6342{
a47970ff
WAA		 6343 struct inode *inode = lgp->args.inode;
6344 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6345 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6346 struct rpc_task *task;
6347 struct rpc_message msg = {
6348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6349 .rpc_argp = &lgp->args,
6350 .rpc_resp = &lgp->res,
6351 };
6352 struct rpc_task_setup task_setup_data = {
6353 .rpc_client = server->client,
6354 .rpc_message = &msg,
6355 .callback_ops = &nfs4_layoutget_call_ops,
6356 .callback_data = lgp,
6357 .flags = RPC_TASK_ASYNC,
6358 };
a0b0a6e3 6359 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6360 int status = 0;
6361
6362 dprintk("--> %s\n", __func__);
6363
8554116e
IK		 6364 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6365 if (!lgp->args.layout.pages) {
6366 nfs4_layoutget_release(lgp);
a0b0a6e3 6367 return ERR_PTR(-ENOMEM);
8554116e
IK		 6368 }
6369 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6370 lgp->args.timestamp = jiffies;
8554116e 6371
35124a09 6372 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6373 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6374 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6375
6376 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6377 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6378
b1f69b75
AA		 6379 task = rpc_run_task(&task_setup_data);
6380 if (IS_ERR(task))
a0b0a6e3 6381 return ERR_CAST(task);
b1f69b75 6382 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6383 if (status == 0)
6384 status = task->tk_status;
085b7a45
WAA		 6385 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6386 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6387 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6388 rpc_put_task(task);
6389 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6390 if (status)
6391 return ERR_PTR(status);
6392 return lseg;
b1f69b75
AA		 6393}
6394
cbe82603
BH		 6395static void
6396nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6397{
6398 struct nfs4_layoutreturn *lrp = calldata;
6399
6400 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6401 nfs41_setup_sequence(lrp->clp->cl_session,
6402 &lrp->args.seq_args,
6403 &lrp->res.seq_res,
6404 task);
cbe82603
BH		 6405}
6406
6407static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6408{
6409 struct nfs4_layoutreturn *lrp = calldata;
6410 struct nfs_server *server;
6411
6412 dprintk("--> %s\n", __func__);
6413
6ba7db34 6414 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6415 return;
6416
6417 server = NFS_SERVER(lrp->args.inode);
6418 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6419 rpc_restart_call_prepare(task);
cbe82603
BH		 6420 return;
6421 }
cbe82603
BH		 6422 dprintk("<-- %s\n", __func__);
6423}
6424
6425static void nfs4_layoutreturn_release(void *calldata)
6426{
6427 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6428 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6429
6430 dprintk("--> %s\n", __func__);
849b286f
TM		 6431 spin_lock(&lo->plh_inode->i_lock);
6432 if (lrp->res.lrs_present)
6433 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6434 lo->plh_block_lgets--;
6435 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6436 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6437 kfree(calldata);
6438 dprintk("<-- %s\n", __func__);
6439}
6440
6441static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6442 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6443 .rpc_call_done = nfs4_layoutreturn_done,
6444 .rpc_release = nfs4_layoutreturn_release,
6445};
6446
6447int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6448{
6449 struct rpc_task *task;
6450 struct rpc_message msg = {
6451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6452 .rpc_argp = &lrp->args,
6453 .rpc_resp = &lrp->res,
6454 };
6455 struct rpc_task_setup task_setup_data = {
6456 .rpc_client = lrp->clp->cl_rpcclient,
6457 .rpc_message = &msg,
6458 .callback_ops = &nfs4_layoutreturn_call_ops,
6459 .callback_data = lrp,
6460 };
6461 int status;
6462
6463 dprintk("--> %s\n", __func__);
9d12b216 6464 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6465 task = rpc_run_task(&task_setup_data);
6466 if (IS_ERR(task))
6467 return PTR_ERR(task);
6468 status = task->tk_status;
6469 dprintk("<-- %s status=%d\n", __func__, status);
6470 rpc_put_task(task);
6471 return status;
6472}
6473
7f11d8d3
AA		 6474/*
6475 * Retrieve the list of Data Server devices from the MDS.
6476 */
6477static int _nfs4_getdevicelist(struct nfs_server *server,
6478 const struct nfs_fh *fh,
6479 struct pnfs_devicelist *devlist)
6480{
6481 struct nfs4_getdevicelist_args args = {
6482 .fh = fh,
6483 .layoutclass = server->pnfs_curr_ld->id,
6484 };
6485 struct nfs4_getdevicelist_res res = {
6486 .devlist = devlist,
6487 };
6488 struct rpc_message msg = {
6489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6490 .rpc_argp = &args,
6491 .rpc_resp = &res,
6492 };
6493 int status;
6494
6495 dprintk("--> %s\n", __func__);
6496 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6497 &res.seq_res, 0);
6498 dprintk("<-- %s status=%d\n", __func__, status);
6499 return status;
6500}
6501
6502int nfs4_proc_getdevicelist(struct nfs_server *server,
6503 const struct nfs_fh *fh,
6504 struct pnfs_devicelist *devlist)
6505{
6506 struct nfs4_exception exception = { };
6507 int err;
6508
6509 do {
6510 err = nfs4_handle_exception(server,
6511 _nfs4_getdevicelist(server, fh, devlist),
6512 &exception);
6513 } while (exception.retry);
6514
6515 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6516 err, devlist->num_devs);
6517
6518 return err;
6519}
6520EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6521
b1f69b75
AA		 6522static int
6523_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6524{
6525 struct nfs4_getdeviceinfo_args args = {
6526 .pdev = pdev,
6527 };
6528 struct nfs4_getdeviceinfo_res res = {
6529 .pdev = pdev,
6530 };
6531 struct rpc_message msg = {
6532 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6533 .rpc_argp = &args,
6534 .rpc_resp = &res,
6535 };
6536 int status;
6537
6538 dprintk("--> %s\n", __func__);
7c513058 6539 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6540 dprintk("<-- %s status=%d\n", __func__, status);
6541
6542 return status;
6543}
6544
6545int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6546{
6547 struct nfs4_exception exception = { };
6548 int err;
6549
6550 do {
6551 err = nfs4_handle_exception(server,
6552 _nfs4_proc_getdeviceinfo(server, pdev),
6553 &exception);
6554 } while (exception.retry);
6555 return err;
6556}
6557EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6558
863a3c6c
AA		 6559static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6560{
6561 struct nfs4_layoutcommit_data *data = calldata;
6562 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6563 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6564
d9afbd1b
TM		 6565 nfs41_setup_sequence(session,
6566 &data->args.seq_args,
6567 &data->res.seq_res,
6568 task);
863a3c6c
AA		 6569}
6570
6571static void
6572nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6573{
6574 struct nfs4_layoutcommit_data *data = calldata;
6575 struct nfs_server *server = NFS_SERVER(data->args.inode);
6576
6ba7db34 6577 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6578 return;
6579
6580 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6581 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6582 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6583 case -NFS4ERR_BADLAYOUT: /* no layout */
6584 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6585 task->tk_status = 0;
e59d27e0
TM		 6586 break;
6587 case 0:
863a3c6c
AA		 6588 nfs_post_op_update_inode_force_wcc(data->args.inode,
6589 data->res.fattr);
e59d27e0
TM		 6590 break;
6591 default:
6592 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6593 rpc_restart_call_prepare(task);
6594 return;
6595 }
6596 }
863a3c6c
AA		 6597}
6598
6599static void nfs4_layoutcommit_release(void *calldata)
6600{
6601 struct nfs4_layoutcommit_data *data = calldata;
6602
db29c089 6603 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6604 put_rpccred(data->cred);
6605 kfree(data);
6606}
6607
6608static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6609 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6610 .rpc_call_done = nfs4_layoutcommit_done,
6611 .rpc_release = nfs4_layoutcommit_release,
6612};
6613
6614int
ef311537 6615nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6616{
6617 struct rpc_message msg = {
6618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6619 .rpc_argp = &data->args,
6620 .rpc_resp = &data->res,
6621 .rpc_cred = data->cred,
6622 };
6623 struct rpc_task_setup task_setup_data = {
6624 .task = &data->task,
6625 .rpc_client = NFS_CLIENT(data->args.inode),
6626 .rpc_message = &msg,
6627 .callback_ops = &nfs4_layoutcommit_ops,
6628 .callback_data = data,
6629 .flags = RPC_TASK_ASYNC,
6630 };
6631 struct rpc_task *task;
6632 int status = 0;
6633
6634 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6635 "lbw: %llu inode %lu\n",
6636 data->task.tk_pid, sync,
6637 data->args.lastbytewritten,
6638 data->args.inode->i_ino);
6639
9d12b216 6640 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6641 task = rpc_run_task(&task_setup_data);
6642 if (IS_ERR(task))
6643 return PTR_ERR(task);
ef311537 6644 if (sync == false)
863a3c6c
AA		 6645 goto out;
6646 status = nfs4_wait_for_completion_rpc_task(task);
6647 if (status != 0)
6648 goto out;
6649 status = task->tk_status;
6650out:
6651 dprintk("%s: status %d\n", __func__, status);
6652 rpc_put_task(task);
6653 return status;
6654}
fca78d6d
BS		 6655
6656static int
6657_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6658 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6659{
6660 struct nfs41_secinfo_no_name_args args = {
6661 .style = SECINFO_STYLE_CURRENT_FH,
6662 };
6663 struct nfs4_secinfo_res res = {
6664 .flavors = flavors,
6665 };
6666 struct rpc_message msg = {
6667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6668 .rpc_argp = &args,
6669 .rpc_resp = &res,
6670 };
6671 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6672}
6673
6674static int
6675nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6676 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6677{
6678 struct nfs4_exception exception = { };
6679 int err;
6680 do {
6681 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6682 switch (err) {
6683 case 0:
6684 case -NFS4ERR_WRONGSEC:
6685 case -NFS4ERR_NOTSUPP:
05e9cfb4 6686 goto out;
fca78d6d
BS		 6687 default:
6688 err = nfs4_handle_exception(server, err, &exception);
6689 }
6690 } while (exception.retry);
05e9cfb4 6691out:
fca78d6d
BS		 6692 return err;
6693}
6694
6695static int
6696nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6697 struct nfs_fsinfo *info)
6698{
6699 int err;
6700 struct page *page;
6701 rpc_authflavor_t flavor;
6702 struct nfs4_secinfo_flavors *flavors;
6703
6704 page = alloc_page(GFP_KERNEL);
6705 if (!page) {
6706 err = -ENOMEM;
6707 goto out;
6708 }
6709
6710 flavors = page_address(page);
6711 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6712
6713 /*
6714 * Fall back on "guess and check" method if
6715 * the server doesn't support SECINFO_NO_NAME
6716 */
6717 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6718 err = nfs4_find_root_sec(server, fhandle, info);
6719 goto out_freepage;
6720 }
6721 if (err)
6722 goto out_freepage;
6723
6724 flavor = nfs_find_best_sec(flavors);
6725 if (err == 0)
6726 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6727
6728out_freepage:
6729 put_page(page);
6730 if (err == -EACCES)
6731 return -EPERM;
6732out:
6733 return err;
6734}
1cab0652
BS		 6735
6736static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6737{
6738 int status;
6739 struct nfs41_test_stateid_args args = {
1cab0652 6740 .stateid = stateid,
7d974794
BS		 6741 };
6742 struct nfs41_test_stateid_res res;
6743 struct rpc_message msg = {
6744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6745 .rpc_argp = &args,
6746 .rpc_resp = &res,
6747 };
1cab0652 6748
38527b15 6749 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6750 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6751 nfs4_set_sequence_privileged(&args.seq_args);
6752 status = nfs4_call_sync_sequence(server->client, server, &msg,
6753 &args.seq_args, &res.seq_res);
38527b15
CL		 6754 if (status != NFS_OK) {
6755 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6756 return status;
38527b15
CL		 6757 }
6758 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6759 return -res.status;
7d974794
BS		 6760}
6761
38527b15
CL		 6762/**
6763 * nfs41_test_stateid - perform a TEST_STATEID operation
6764 *
6765 * @server: server / transport on which to perform the operation
6766 * @stateid: state ID to test
6767 *
6768 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6769 * Otherwise a negative NFS4ERR value is returned if the operation
6770 * failed or the state ID is not currently valid.
6771 */
1cab0652 6772static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6773{
6774 struct nfs4_exception exception = { };
6775 int err;
6776 do {
377e507d
CL		 6777 err = _nfs41_test_stateid(server, stateid);
6778 if (err != -NFS4ERR_DELAY)
6779 break;
6780 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6781 } while (exception.retry);
6782 return err;
6783}
9aeda35f 6784
7c1d5fae
TM		 6785struct nfs_free_stateid_data {
6786 struct nfs_server *server;
6787 struct nfs41_free_stateid_args args;
9aeda35f 6788 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 6789};
6790
6791static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
6792{
6793 struct nfs_free_stateid_data *data = calldata;
6794 nfs41_setup_sequence(nfs4_get_session(data->server),
6795 &data->args.seq_args,
6796 &data->res.seq_res,
6797 task);
6798}
6799
6800static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
6801{
6802 struct nfs_free_stateid_data *data = calldata;
6803
6804 nfs41_sequence_done(task, &data->res.seq_res);
6805
6806 switch (task->tk_status) {
6807 case -NFS4ERR_DELAY:
6808 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
6809 rpc_restart_call_prepare(task);
6810 }
6811}
6812
6813static void nfs41_free_stateid_release(void *calldata)
6814{
6815 kfree(calldata);
6816}
6817
6818const struct rpc_call_ops nfs41_free_stateid_ops = {
6819 .rpc_call_prepare = nfs41_free_stateid_prepare,
6820 .rpc_call_done = nfs41_free_stateid_done,
6821 .rpc_release = nfs41_free_stateid_release,
6822};
6823
6824static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
6825 nfs4_stateid *stateid,
6826 bool privileged)
6827{
9aeda35f
BS		 6828 struct rpc_message msg = {
6829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9aeda35f 6830 };
7c1d5fae
TM		 6831 struct rpc_task_setup task_setup = {
6832 .rpc_client = server->client,
6833 .rpc_message = &msg,
6834 .callback_ops = &nfs41_free_stateid_ops,
6835 .flags = RPC_TASK_ASYNC,
6836 };
6837 struct nfs_free_stateid_data *data;
9aeda35f 6838
38527b15 6839 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 6840 data = kmalloc(sizeof(*data), GFP_NOFS);
6841 if (!data)
6842 return ERR_PTR(-ENOMEM);
6843 data->server = server;
6844 nfs4_stateid_copy(&data->args.stateid, stateid);
6845
6846 task_setup.callback_data = data;
6847
6848 msg.rpc_argp = &data->args;
6849 msg.rpc_resp = &data->res;
6850 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6851 if (privileged)
6852 nfs4_set_sequence_privileged(&data->args.seq_args);
6853
6854 return rpc_run_task(&task_setup);
9aeda35f
BS		 6855}
6856
38527b15
CL		 6857/**
6858 * nfs41_free_stateid - perform a FREE_STATEID operation
6859 *
6860 * @server: server / transport on which to perform the operation
6861 * @stateid: state ID to release
6862 *
6863 * Returns NFS_OK if the server freed "stateid". Otherwise a
6864 * negative NFS4ERR value is returned.
6865 */
1cab0652 6866static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6867{
7c1d5fae
TM		 6868 struct rpc_task *task;
6869 int ret;
6870
6871 task = _nfs41_free_stateid(server, stateid, true);
6872 if (IS_ERR(task))
6873 return PTR_ERR(task);
6874 ret = rpc_wait_for_completion_task(task);
6875 if (!ret)
6876 ret = task->tk_status;
6877 rpc_put_task(task);
6878 return ret;
9aeda35f 6879}
36281caa 6880
c8b2d0bf
TM		 6881static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
6882{
6883 struct rpc_task *task;
6884
6885 task = _nfs41_free_stateid(server, &lsp->ls_stateid, false);
6886 nfs4_free_lock_state(server, lsp);
6887 if (IS_ERR(task))
6888 return PTR_ERR(task);
6889 rpc_put_task(task);
6890 return 0;
6891}
6892
36281caa
TM		 6893static bool nfs41_match_stateid(const nfs4_stateid *s1,
6894 const nfs4_stateid *s2)
6895{
2d2f24ad 6896 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6897 return false;
6898
2d2f24ad 6899 if (s1->seqid == s2->seqid)
36281caa 6900 return true;
2d2f24ad 6901 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6902 return true;
6903
6904 return false;
6905}
6906
557134a3
AA		 6907#endif /* CONFIG_NFS_V4_1 */
6908
36281caa
TM		 6909static bool nfs4_match_stateid(const nfs4_stateid *s1,
6910 const nfs4_stateid *s2)
6911{
f597c537 6912 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6913}
6914
6915
17280175 6916static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6917 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6918 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6919 .recover_open = nfs4_open_reclaim,
6920 .recover_lock = nfs4_lock_reclaim,
591d71cb 6921 .establish_clid = nfs4_init_clientid,
90a16617 6922 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6923 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6924};
6925
591d71cb 6926#if defined(CONFIG_NFS_V4_1)
17280175 6927static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6928 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6929 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6930 .recover_open = nfs4_open_reclaim,
6931 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6932 .establish_clid = nfs41_init_clientid,
b4b82607 6933 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6934 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6935 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6936};
6937#endif /* CONFIG_NFS_V4_1 */
6938
17280175 6939static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6940 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6941 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6942 .recover_open = nfs4_open_expired,
6943 .recover_lock = nfs4_lock_expired,
6944 .establish_clid = nfs4_init_clientid,
90a16617 6945 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6946};
6947
6948#if defined(CONFIG_NFS_V4_1)
17280175 6949static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6950 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6951 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6952 .recover_open = nfs41_open_expired,
6953 .recover_lock = nfs41_lock_expired,
4d643d1d 6954 .establish_clid = nfs41_init_clientid,
b4b82607 6955 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6956};
591d71cb 6957#endif /* CONFIG_NFS_V4_1 */
1da177e4 6958
17280175 6959static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6960 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6961 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6962 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6963};
6964
6965#if defined(CONFIG_NFS_V4_1)
17280175 6966static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6967 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6968 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6969 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6970};
6971#endif
6972
97dc1359
TM		 6973static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6974 .minor_version = 0,
39c6daae
TM		 6975 .init_caps = NFS_CAP_READDIRPLUS
6976 | NFS_CAP_ATOMIC_OPEN
6977 | NFS_CAP_CHANGE_ATTR
6978 | NFS_CAP_POSIX_LOCK,
97dc1359 6979 .call_sync = _nfs4_call_sync,
36281caa 6980 .match_stateid = nfs4_match_stateid,
fca78d6d 6981 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 6982 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 6983 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6984 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6985 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6986};
6987
6988#if defined(CONFIG_NFS_V4_1)
6989static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6990 .minor_version = 1,
39c6daae
TM		 6991 .init_caps = NFS_CAP_READDIRPLUS
6992 | NFS_CAP_ATOMIC_OPEN
6993 | NFS_CAP_CHANGE_ATTR
3b66486c 6994 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 6995 | NFS_CAP_STATEID_NFSV41
6996 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 6997 .call_sync = nfs4_call_sync_sequence,
36281caa 6998 .match_stateid = nfs41_match_stateid,
fca78d6d 6999 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7000 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7001 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7002 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7003 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7004};
7005#endif
7006
42c2c424
SD		 7007#if defined(CONFIG_NFS_V4_2)
7008static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7009 .minor_version = 2,
7010 .call_sync = nfs4_call_sync_sequence,
7011 .match_stateid = nfs41_match_stateid,
7012 .find_root_sec = nfs41_find_root_sec,
7013 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7014 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7015 .state_renewal_ops = &nfs41_state_renewal_ops,
7016};
7017#endif
7018
97dc1359
TM		 7019const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7020 [0] = &nfs_v4_0_minor_ops,
7021#if defined(CONFIG_NFS_V4_1)
7022 [1] = &nfs_v4_1_minor_ops,
7023#endif
42c2c424
SD		 7024#if defined(CONFIG_NFS_V4_2)
7025 [2] = &nfs_v4_2_minor_ops,
7026#endif
97dc1359
TM		 7027};
7028
73a79706
BS		 7029const struct inode_operations nfs4_dir_inode_operations = {
7030 .create = nfs_create,
7031 .lookup = nfs_lookup,
7032 .atomic_open = nfs_atomic_open,
7033 .link = nfs_link,
7034 .unlink = nfs_unlink,
7035 .symlink = nfs_symlink,
7036 .mkdir = nfs_mkdir,
7037 .rmdir = nfs_rmdir,
7038 .mknod = nfs_mknod,
7039 .rename = nfs_rename,
7040 .permission = nfs_permission,
7041 .getattr = nfs_getattr,
7042 .setattr = nfs_setattr,
7043 .getxattr = generic_getxattr,
7044 .setxattr = generic_setxattr,
7045 .listxattr = generic_listxattr,
7046 .removexattr = generic_removexattr,
7047};
7048
92e1d5be 7049static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7050 .permission = nfs_permission,
7051 .getattr = nfs_getattr,
7052 .setattr = nfs_setattr,
64c2ce8b
AK		 7053 .getxattr = generic_getxattr,
7054 .setxattr = generic_setxattr,
7055 .listxattr = generic_listxattr,
7056 .removexattr = generic_removexattr,
6b3b5496
BF		 7057};
7058
509de811 7059const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7060 .version = 4, /* protocol version */
7061 .dentry_ops = &nfs4_dentry_operations,
7062 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7063 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7064 .file_ops = &nfs4_file_operations,
1da177e4 7065 .getroot = nfs4_proc_get_root,
281cad46 7066 .submount = nfs4_submount,
ff9099f2 7067 .try_mount = nfs4_try_mount,
1da177e4
LT		 7068 .getattr = nfs4_proc_getattr,
7069 .setattr = nfs4_proc_setattr,
7070 .lookup = nfs4_proc_lookup,
7071 .access = nfs4_proc_access,
7072 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7073 .create = nfs4_proc_create,
7074 .remove = nfs4_proc_remove,
7075 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7076 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7077 .unlink_done = nfs4_proc_unlink_done,
7078 .rename = nfs4_proc_rename,
d3d4152a 7079 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7080 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7081 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7082 .link = nfs4_proc_link,
7083 .symlink = nfs4_proc_symlink,
7084 .mkdir = nfs4_proc_mkdir,
7085 .rmdir = nfs4_proc_remove,
7086 .readdir = nfs4_proc_readdir,
7087 .mknod = nfs4_proc_mknod,
7088 .statfs = nfs4_proc_statfs,
7089 .fsinfo = nfs4_proc_fsinfo,
7090 .pathconf = nfs4_proc_pathconf,
e9326dca 7091 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7092 .decode_dirent = nfs4_decode_dirent,
7093 .read_setup = nfs4_proc_read_setup,
1abb5088 7094 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7095 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7096 .read_done = nfs4_read_done,
1da177e4 7097 .write_setup = nfs4_proc_write_setup,
57208fa7 7098 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7099 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7100 .write_done = nfs4_write_done,
1da177e4 7101 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7102 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7103 .commit_done = nfs4_commit_done,
1da177e4 7104 .lock = nfs4_proc_lock,
e50a1c2e 7105 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7106 .close_context = nfs4_close_context,
2b484297 7107 .open_context = nfs4_atomic_open,
011e2a7f 7108 .have_delegation = nfs4_have_delegation,
57ec14c5 7109 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7110 .alloc_client = nfs4_alloc_client,
45a52a02 7111 .init_client = nfs4_init_client,
cdb7eced 7112 .free_client = nfs4_free_client,
1179acc6
BS		 7113 .create_server = nfs4_create_server,
7114 .clone_server = nfs_clone_server,
1da177e4
LT		 7115};
7116
64c2ce8b
AK		 7117static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7118 .prefix = XATTR_NAME_NFSV4_ACL,
7119 .list = nfs4_xattr_list_nfs4_acl,
7120 .get = nfs4_xattr_get_nfs4_acl,
7121 .set = nfs4_xattr_set_nfs4_acl,
7122};
7123
7124const struct xattr_handler *nfs4_xattr_handlers[] = {
7125 &nfs4_xattr_nfs4_acl_handler,
7126 NULL
7127};
7128
1da177e4
LT		 7129/*
7130 * Local variables:
7131 * c-basic-offset: 8
7132 * End:
7133 */
Linux 6.x block layer and io_uring tree(s)