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import PULS_20160108
[GitHub/mt8127/android_kernel_alcatel_ttab.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;
6fa3eb70 271 freezable_schedule_timeout_killable_unsafe(*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);
774d5f14 575 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_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;
f448badd 1081 int open_mode = opendata->o_arg.open_flags;
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
231817ee
WAA		 1162 if (!data->rpc_done) {
1163 if (data->rpc_status) {
1164 ret = data->rpc_status;
1165 goto err;
1166 }
1167 /* cached opens have already been processed */
1168 goto update;
e23008ec
AA		 1169 }
1170
e23008ec
AA		 1171 ret = nfs_refresh_inode(inode, &data->f_attr);
1172 if (ret)
1173 goto err;
1174
1175 if (data->o_res.delegation_type != 0)
1176 nfs4_opendata_check_deleg(data, state);
231817ee 1177update:
e23008ec
AA		 1178 update_open_stateid(state, &data->o_res.stateid, NULL,
1179 data->o_arg.fmode);
1311157d 1180 atomic_inc(&state->count);
e23008ec
AA		 1181
1182 return state;
1183err:
1184 return ERR_PTR(ret);
1185
1186}
1187
1188static struct nfs4_state *
1189_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1190{
1191 struct inode *inode;
1192 struct nfs4_state *state = NULL;
1b370bc2 1193 int ret;
24ac23ab 1194
aac00a8d 1195 if (!data->rpc_done) {
6ee41268 1196 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1197 goto out;
1198 }
1199
1b370bc2 1200 ret = -EAGAIN;
24ac23ab 1201 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1202 goto err;
24ac23ab 1203 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1204 ret = PTR_ERR(inode);
03f28e3a 1205 if (IS_ERR(inode))
1b370bc2
TM		 1206 goto err;
1207 ret = -ENOMEM;
24ac23ab
TM		 1208 state = nfs4_get_open_state(inode, data->owner);
1209 if (state == NULL)
1b370bc2 1210 goto err_put_inode;
e23008ec
AA		 1211 if (data->o_res.delegation_type != 0)
1212 nfs4_opendata_check_deleg(data, state);
34310430 1213 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1214 data->o_arg.fmode);
24ac23ab 1215 iput(inode);
aac00a8d 1216out:
7aa262b5 1217 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1218 return state;
1b370bc2
TM		 1219err_put_inode:
1220 iput(inode);
1221err:
1222 return ERR_PTR(ret);
24ac23ab
TM		 1223}
1224
e23008ec
AA		 1225static struct nfs4_state *
1226nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1227{
1228 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1229 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1230 return _nfs4_opendata_to_nfs4_state(data);
1231}
1232
864472e9
TM		 1233static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1234{
1235 struct nfs_inode *nfsi = NFS_I(state->inode);
1236 struct nfs_open_context *ctx;
1237
1238 spin_lock(&state->inode->i_lock);
1239 list_for_each_entry(ctx, &nfsi->open_files, list) {
1240 if (ctx->state != state)
1241 continue;
1242 get_nfs_open_context(ctx);
1243 spin_unlock(&state->inode->i_lock);
1244 return ctx;
1245 }
1246 spin_unlock(&state->inode->i_lock);
1247 return ERR_PTR(-ENOENT);
1248}
1249
4a1c0893
TM		 1250static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1251 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1252{
1253 struct nfs4_opendata *opendata;
1254
4a1c0893
TM		 1255 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1256 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1257 if (opendata == NULL)
1258 return ERR_PTR(-ENOMEM);
1259 opendata->state = state;
1260 atomic_inc(&state->count);
1261 return opendata;
1262}
1263
dc0b027d 1264static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1265{
2ced46c2 1266 struct nfs4_state *newstate;
864472e9
TM		 1267 int ret;
1268
dc0b027d
TM		 1269 opendata->o_arg.open_flags = 0;
1270 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1271 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1272 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1273 nfs4_init_opendata_res(opendata);
b257957e 1274 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1275 if (ret != 0)
1276 return ret;
2ced46c2 1277 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1278 if (IS_ERR(newstate))
1279 return PTR_ERR(newstate);
643168c2 1280 nfs4_close_state(newstate, fmode);
2ced46c2 1281 *res = newstate;
864472e9
TM		 1282 return 0;
1283}
1284
1285static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1286{
864472e9 1287 struct nfs4_state *newstate;
864472e9
TM		 1288 int ret;
1289
1290 /* memory barrier prior to reading state->n_* */
2ced46c2 1291 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1292 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1293 smp_rmb();
1294 if (state->n_rdwr != 0) {
b0ed9dbc 1295 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1296 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1297 if (ret != 0)
1298 return ret;
2ced46c2
TM		 1299 if (newstate != state)
1300 return -ESTALE;
864472e9
TM		 1301 }
1302 if (state->n_wronly != 0) {
b0ed9dbc 1303 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1304 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1305 if (ret != 0)
1306 return ret;
2ced46c2
TM		 1307 if (newstate != state)
1308 return -ESTALE;
864472e9
TM		 1309 }
1310 if (state->n_rdonly != 0) {
b0ed9dbc 1311 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1312 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1313 if (ret != 0)
1314 return ret;
2ced46c2
TM		 1315 if (newstate != state)
1316 return -ESTALE;
864472e9 1317 }
1ac7e2fd
TM		 1318 /*
1319 * We may have performed cached opens for all three recoveries.
1320 * Check if we need to update the current stateid.
1321 */
1322 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1323 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1324 write_seqlock(&state->seqlock);
1ac7e2fd 1325 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1326 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1327 write_sequnlock(&state->seqlock);
1ac7e2fd 1328 }
864472e9
TM		 1329 return 0;
1330}
1331
1da177e4
LT		 1332/*
1333 * OPEN_RECLAIM:
1334 * reclaim state on the server after a reboot.
1da177e4 1335 */
539cd03a 1336static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1337{
1ac7e2fd 1338 struct nfs_delegation *delegation;
864472e9 1339 struct nfs4_opendata *opendata;
dc0b027d 1340 fmode_t delegation_type = 0;
1da177e4
LT		 1341 int status;
1342
4a1c0893
TM		 1343 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1344 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1345 if (IS_ERR(opendata))
1346 return PTR_ERR(opendata);
1ac7e2fd
TM		 1347 rcu_read_lock();
1348 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1349 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1350 delegation_type = delegation->type;
1ac7e2fd 1351 rcu_read_unlock();
864472e9
TM		 1352 opendata->o_arg.u.delegation_type = delegation_type;
1353 status = nfs4_open_recover(opendata, state);
c6d00e63 1354 nfs4_opendata_put(opendata);
1da177e4
LT		 1355 return status;
1356}
1357
539cd03a 1358static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1359{
1360 struct nfs_server *server = NFS_SERVER(state->inode);
1361 struct nfs4_exception exception = { };
1362 int err;
1363 do {
539cd03a 1364 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1365 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1366 continue;
168667c4 1367 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1368 break;
1369 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1370 } while (exception.retry);
1371 return err;
1372}
1373
864472e9
TM		 1374static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1375{
1376 struct nfs_open_context *ctx;
1377 int ret;
1378
1379 ctx = nfs4_state_find_open_context(state);
1380 if (IS_ERR(ctx))
91876b13 1381 return -EAGAIN;
539cd03a 1382 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1383 put_nfs_open_context(ctx);
1384 return ret;
1385}
1386
db4f2e63 1387static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1388{
be76b5b6
TM		 1389 switch (err) {
1390 default:
1391 printk(KERN_ERR "NFS: %s: unhandled error "
1392 "%d.\n", __func__, err);
1393 case 0:
1394 case -ENOENT:
1395 case -ESTALE:
1396 break;
1397 case -NFS4ERR_BADSESSION:
1398 case -NFS4ERR_BADSLOT:
1399 case -NFS4ERR_BAD_HIGH_SLOT:
1400 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1401 case -NFS4ERR_DEADSESSION:
1402 set_bit(NFS_DELEGATED_STATE, &state->flags);
1403 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1404 return -EAGAIN;
1405 case -NFS4ERR_STALE_CLIENTID:
1406 case -NFS4ERR_STALE_STATEID:
1407 set_bit(NFS_DELEGATED_STATE, &state->flags);
1408 case -NFS4ERR_EXPIRED:
1409 /* Don't recall a delegation if it was lost */
1410 nfs4_schedule_lease_recovery(server->nfs_client);
1411 return -EAGAIN;
1412 case -NFS4ERR_DELEG_REVOKED:
1413 case -NFS4ERR_ADMIN_REVOKED:
1414 case -NFS4ERR_BAD_STATEID:
db4f2e63 1415 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1416 nfs_inode_find_state_and_recover(state->inode,
1417 stateid);
1418 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1419 return 0;
1420 case -NFS4ERR_DELAY:
1421 case -NFS4ERR_GRACE:
1422 set_bit(NFS_DELEGATED_STATE, &state->flags);
1423 ssleep(1);
1424 return -EAGAIN;
db4f2e63
TM		 1425 case -ENOMEM:
1426 case -NFS4ERR_DENIED:
1427 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1428 return 0;
be76b5b6 1429 }
1da177e4
LT		 1430 return err;
1431}
1432
db4f2e63
TM		 1433int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1434{
1435 struct nfs_server *server = NFS_SERVER(state->inode);
1436 struct nfs4_opendata *opendata;
1437 int err;
1438
1439 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1440 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1441 if (IS_ERR(opendata))
1442 return PTR_ERR(opendata);
1443 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1444 err = nfs4_open_recover(opendata, state);
1445 nfs4_opendata_put(opendata);
1446 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1447}
1448
cdd4e68b
TM		 1449static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1450{
1451 struct nfs4_opendata *data = calldata;
1452
1453 data->rpc_status = task->tk_status;
26e976a8 1454 if (data->rpc_status == 0) {
f597c537 1455 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1456 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1457 renew_lease(data->o_res.server, data->timestamp);
3e309914 1458 data->rpc_done = 1;
26e976a8 1459 }
cdd4e68b
TM		 1460}
1461
1462static void nfs4_open_confirm_release(void *calldata)
1463{
1464 struct nfs4_opendata *data = calldata;
1465 struct nfs4_state *state = NULL;
1466
1467 /* If this request hasn't been cancelled, do nothing */
1468 if (data->cancelled == 0)
1469 goto out_free;
1470 /* In case of error, no cleanup! */
3e309914 1471 if (!data->rpc_done)
cdd4e68b 1472 goto out_free;
cdd4e68b 1473 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1474 if (!IS_ERR(state))
643168c2 1475 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1476out_free:
c6d00e63 1477 nfs4_opendata_put(data);
cdd4e68b
TM		 1478}
1479
1480static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1481 .rpc_call_done = nfs4_open_confirm_done,
1482 .rpc_release = nfs4_open_confirm_release,
1483};
1484
1485/*
1486 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1487 */
1488static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1489{
1490 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1491 struct rpc_task *task;
5138fde0
TM		 1492 struct rpc_message msg = {
1493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1494 .rpc_argp = &data->c_arg,
1495 .rpc_resp = &data->c_res,
1496 .rpc_cred = data->owner->so_cred,
1497 };
c970aa85
TM		 1498 struct rpc_task_setup task_setup_data = {
1499 .rpc_client = server->client,
5138fde0 1500 .rpc_message = &msg,
c970aa85
TM		 1501 .callback_ops = &nfs4_open_confirm_ops,
1502 .callback_data = data,
101070ca 1503 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1504 .flags = RPC_TASK_ASYNC,
1505 };
1da177e4
LT		 1506 int status;
1507
c6d00e63 1508 kref_get(&data->kref);
3e309914
TM		 1509 data->rpc_done = 0;
1510 data->rpc_status = 0;
5138fde0 1511 data->timestamp = jiffies;
c970aa85 1512 task = rpc_run_task(&task_setup_data);
7a1218a2 1513 if (IS_ERR(task))
cdd4e68b 1514 return PTR_ERR(task);
cdd4e68b
TM		 1515 status = nfs4_wait_for_completion_rpc_task(task);
1516 if (status != 0) {
1517 data->cancelled = 1;
1518 smp_wmb();
1519 } else
1520 status = data->rpc_status;
e6b3c4db 1521 rpc_put_task(task);
1da177e4
LT		 1522 return status;
1523}
1524
24ac23ab 1525static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1526{
24ac23ab
TM		 1527 struct nfs4_opendata *data = calldata;
1528 struct nfs4_state_owner *sp = data->owner;
549b19cc 1529 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1530
24ac23ab 1531 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1532 goto out_wait;
aac00a8d
TM		 1533 /*
1534 * Check if we still need to send an OPEN call, or if we can use
1535 * a delegation instead.
1536 */
1537 if (data->state != NULL) {
1538 struct nfs_delegation *delegation;
1539
dc0b027d 1540 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1541 goto out_no_action;
aac00a8d
TM		 1542 rcu_read_lock();
1543 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1544 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1545 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1546 can_open_delegated(delegation, data->o_arg.fmode))
1547 goto unlock_no_action;
aac00a8d
TM		 1548 rcu_read_unlock();
1549 }
95b72eb0 1550 /* Update client id. */
549b19cc 1551 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1552 switch (data->o_arg.claim) {
1553 case NFS4_OPEN_CLAIM_PREVIOUS:
1554 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1555 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1556 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1557 case NFS4_OPEN_CLAIM_FH:
1558 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1559 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1560 }
26e976a8 1561 data->timestamp = jiffies;
035168ab 1562 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1563 &data->o_arg.seq_args,
2240a9e2
TM		 1564 &data->o_res.seq_res,
1565 task) != 0)
1566 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1567
1568 /* Set the create mode (note dependency on the session type) */
1569 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1570 if (data->o_arg.open_flags & O_EXCL) {
1571 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1572 if (nfs4_has_persistent_session(clp))
1573 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1574 else if (clp->cl_mvops->minor_version > 0)
1575 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1576 }
6ee41268 1577 return;
652f89f6
TM		 1578unlock_no_action:
1579 rcu_read_unlock();
6ee41268
TM		 1580out_no_action:
1581 task->tk_action = NULL;
c8da19b9 1582out_wait:
b75ad4cd 1583 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1584}
1585
24ac23ab
TM		 1586static void nfs4_open_done(struct rpc_task *task, void *calldata)
1587{
1588 struct nfs4_opendata *data = calldata;
1da177e4 1589
24ac23ab 1590 data->rpc_status = task->tk_status;
d898528c 1591
14516c3a
TM		 1592 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1593 return;
d898528c 1594
24ac23ab 1595 if (task->tk_status == 0) {
807d66d8
TM		 1596 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1597 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1598 case S_IFREG:
1599 break;
1600 case S_IFLNK:
24ac23ab 1601 data->rpc_status = -ELOOP;
6f926b5b
TM		 1602 break;
1603 case S_IFDIR:
24ac23ab 1604 data->rpc_status = -EISDIR;
6f926b5b
TM		 1605 break;
1606 default:
24ac23ab 1607 data->rpc_status = -ENOTDIR;
807d66d8 1608 }
6f926b5b 1609 }
26e976a8 1610 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1611 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1612 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1613 }
3e309914 1614 data->rpc_done = 1;
24ac23ab 1615}
6f926b5b 1616
24ac23ab
TM		 1617static void nfs4_open_release(void *calldata)
1618{
1619 struct nfs4_opendata *data = calldata;
1620 struct nfs4_state *state = NULL;
1621
1622 /* If this request hasn't been cancelled, do nothing */
1623 if (data->cancelled == 0)
1624 goto out_free;
1625 /* In case of error, no cleanup! */
3e309914 1626 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1627 goto out_free;
1628 /* In case we need an open_confirm, no cleanup! */
1629 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1630 goto out_free;
24ac23ab 1631 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1632 if (!IS_ERR(state))
643168c2 1633 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1634out_free:
c6d00e63 1635 nfs4_opendata_put(data);
24ac23ab
TM		 1636}
1637
1638static const struct rpc_call_ops nfs4_open_ops = {
1639 .rpc_call_prepare = nfs4_open_prepare,
1640 .rpc_call_done = nfs4_open_done,
1641 .rpc_release = nfs4_open_release,
1642};
1643
b257957e 1644static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1645{
1646 struct inode *dir = data->dir->d_inode;
1647 struct nfs_server *server = NFS_SERVER(dir);
1648 struct nfs_openargs *o_arg = &data->o_arg;
1649 struct nfs_openres *o_res = &data->o_res;
1650 struct rpc_task *task;
5138fde0
TM		 1651 struct rpc_message msg = {
1652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1653 .rpc_argp = o_arg,
1654 .rpc_resp = o_res,
1655 .rpc_cred = data->owner->so_cred,
1656 };
c970aa85
TM		 1657 struct rpc_task_setup task_setup_data = {
1658 .rpc_client = server->client,
5138fde0 1659 .rpc_message = &msg,
c970aa85
TM		 1660 .callback_ops = &nfs4_open_ops,
1661 .callback_data = data,
101070ca 1662 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1663 .flags = RPC_TASK_ASYNC,
1664 };
24ac23ab
TM		 1665 int status;
1666
9d12b216 1667 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1668 kref_get(&data->kref);
3e309914
TM		 1669 data->rpc_done = 0;
1670 data->rpc_status = 0;
2ced46c2 1671 data->cancelled = 0;
bdeca1b7
TM		 1672 data->is_recover = 0;
1673 if (isrecover) {
8fe72bac 1674 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1675 data->is_recover = 1;
1676 }
c970aa85 1677 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1678 if (IS_ERR(task))
1679 return PTR_ERR(task);
1680 status = nfs4_wait_for_completion_rpc_task(task);
1681 if (status != 0) {
1682 data->cancelled = 1;
1683 smp_wmb();
1684 } else
1685 status = data->rpc_status;
1686 rpc_put_task(task);
1687
1688 return status;
1689}
1690
1691static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1692{
1693 struct inode *dir = data->dir->d_inode;
1694 struct nfs_openres *o_res = &data->o_res;
1695 int status;
1696
1697 status = nfs4_run_open_task(data, 1);
1698 if (status != 0 || !data->rpc_done)
1699 return status;
1700
6926afd1
TM		 1701 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1702
b257957e
AB		 1703 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1704 status = _nfs4_proc_open_confirm(data);
1705 if (status != 0)
1706 return status;
1707 }
1708
1709 return status;
1710}
1711
6168f62c
WAA		 1712static int nfs4_opendata_access(struct rpc_cred *cred,
1713 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1714 struct nfs4_state *state, fmode_t fmode,
1715 int openflags)
6168f62c
WAA		 1716{
1717 struct nfs_access_entry cache;
1718 u32 mask;
1719
1720 /* access call failed or for some reason the server doesn't
1721 * support any access modes -- defer access call until later */
1722 if (opendata->o_res.access_supported == 0)
1723 return 0;
1724
1725 mask = 0;
bbd3a8ee 1726 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1727 * write mode bits, but POSIX allows the creating process to write.
1728 * use openflags to check for exec, because fmode won't
1729 * always have FMODE_EXEC set when file open for exec. */
1730 if (openflags & __FMODE_EXEC) {
1731 /* ONLY check for exec rights */
1732 mask = MAY_EXEC;
1733 } else if (fmode & FMODE_READ)
1734 mask = MAY_READ;
6168f62c
WAA		 1735
1736 cache.cred = cred;
1737 cache.jiffies = jiffies;
1738 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1739 nfs_access_add_cache(state->inode, &cache);
1740
bbd3a8ee 1741 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1742 return 0;
1743
1744 /* even though OPEN succeeded, access is denied. Close the file */
1745 nfs4_close_state(state, fmode);
998f40b5 1746 return -EACCES;
6168f62c
WAA		 1747}
1748
b257957e
AB		 1749/*
1750 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1751 */
1752static int _nfs4_proc_open(struct nfs4_opendata *data)
1753{
1754 struct inode *dir = data->dir->d_inode;
1755 struct nfs_server *server = NFS_SERVER(dir);
1756 struct nfs_openargs *o_arg = &data->o_arg;
1757 struct nfs_openres *o_res = &data->o_res;
1758 int status;
1759
1760 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1761 if (!data->rpc_done)
1762 return status;
1763 if (status != 0) {
1764 if (status == -NFS4ERR_BADNAME &&
1765 !(o_arg->open_flags & O_CREAT))
1766 return -ENOENT;
24ac23ab 1767 return status;
08ef7bd3 1768 }
24ac23ab 1769
6926afd1
TM		 1770 nfs_fattr_map_and_free_names(server, &data->f_attr);
1771
90ff0c54 1772 if (o_arg->open_flags & O_CREAT)
56ae19f3 1773 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1774 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1775 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1776 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1777 status = _nfs4_proc_open_confirm(data);
1da177e4 1778 if (status != 0)
24ac23ab 1779 return status;
1da177e4
LT		 1780 }
1781 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1782 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1783 return 0;
1da177e4
LT		 1784}
1785
d83217c1
AA		 1786static int nfs4_recover_expired_lease(struct nfs_server *server)
1787{
1788 return nfs4_client_recover_expired_lease(server->nfs_client);
1789}
1790
1da177e4
LT		 1791/*
1792 * OPEN_EXPIRED:
1793 * reclaim state on the server after a network partition.
1794 * Assumes caller holds the appropriate lock
1795 */
539cd03a 1796static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1797{
e56e0b78 1798 struct nfs4_opendata *opendata;
864472e9 1799 int ret;
1da177e4 1800
4a1c0893 1801 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1802 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1803 if (IS_ERR(opendata))
1804 return PTR_ERR(opendata);
864472e9 1805 ret = nfs4_open_recover(opendata, state);
35d05778 1806 if (ret == -ESTALE)
3d4ff43d 1807 d_drop(ctx->dentry);
c6d00e63 1808 nfs4_opendata_put(opendata);
864472e9 1809 return ret;
1da177e4
LT		 1810}
1811
a9ed2e25 1812static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1813{
539cd03a 1814 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1815 struct nfs4_exception exception = { };
1816 int err;
1817
1818 do {
539cd03a 1819 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1820 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1821 continue;
a9ed2e25
TM		 1822 switch (err) {
1823 default:
1824 goto out;
1825 case -NFS4ERR_GRACE:
1826 case -NFS4ERR_DELAY:
1827 nfs4_handle_exception(server, err, &exception);
1828 err = 0;
1829 }
202b50dc 1830 } while (exception.retry);
a9ed2e25 1831out:
202b50dc
TM		 1832 return err;
1833}
1834
1da177e4
LT		 1835static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1836{
1da177e4 1837 struct nfs_open_context *ctx;
864472e9 1838 int ret;
1da177e4 1839
864472e9
TM		 1840 ctx = nfs4_state_find_open_context(state);
1841 if (IS_ERR(ctx))
91876b13 1842 return -EAGAIN;
539cd03a 1843 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1844 put_nfs_open_context(ctx);
1845 return ret;
1da177e4
LT		 1846}
1847
f062eb6c 1848#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1849static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1850{
f062eb6c 1851 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1852 nfs4_stateid *stateid = &state->stateid;
1853 int status;
1854
1855 /* If a state reset has been done, test_stateid is unneeded */
1856 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1857 return;
1858
1859 status = nfs41_test_stateid(server, stateid);
1860 if (status != NFS_OK) {
1861 /* Free the stateid unless the server explicitly
1862 * informs us the stateid is unrecognized. */
1863 if (status != -NFS4ERR_BAD_STATEID)
1864 nfs41_free_stateid(server, stateid);
6938867e 1865 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1866
6938867e
BS		 1867 write_seqlock(&state->seqlock);
1868 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1869 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1870 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1871 }
1872}
1873
1874/**
1875 * nfs41_check_open_stateid - possibly free an open stateid
1876 *
1877 * @state: NFSv4 state for an inode
1878 *
1879 * Returns NFS_OK if recovery for this stateid is now finished.
1880 * Otherwise a negative NFS4ERR value is returned.
1881 */
1882static int nfs41_check_open_stateid(struct nfs4_state *state)
1883{
1884 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1885 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1886 int status;
1887
1888 /* If a state reset has been done, test_stateid is unneeded */
1889 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1890 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1891 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1892 return -NFS4ERR_BAD_STATEID;
1893
1894 status = nfs41_test_stateid(server, stateid);
1895 if (status != NFS_OK) {
1896 /* Free the stateid unless the server explicitly
1897 * informs us the stateid is unrecognized. */
1898 if (status != -NFS4ERR_BAD_STATEID)
1899 nfs41_free_stateid(server, stateid);
1900
1901 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1902 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1903 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 1904 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 1905 }
1906 return status;
1907}
1908
1909static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1910{
eb64cf96 1911 int status;
b01dd1d8 1912
3e60ffdd
CL		 1913 nfs41_clear_delegation_stateid(state);
1914 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1915 if (status != NFS_OK)
1916 status = nfs4_open_expired(sp, state);
1917 return status;
f062eb6c
BS		 1918}
1919#endif
1920
aa53ed54
JL		 1921/*
1922 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1923 * fields corresponding to attributes that were used to store the verifier.
1924 * Make sure we clobber those fields in the later setattr call
1925 */
1926static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1927{
1928 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1929 !(sattr->ia_valid & ATTR_ATIME_SET))
1930 sattr->ia_valid |= ATTR_ATIME;
1931
1932 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1933 !(sattr->ia_valid & ATTR_MTIME_SET))
1934 sattr->ia_valid |= ATTR_MTIME;
1935}
1936
c21443c2
TM		 1937static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1938 fmode_t fmode,
1939 int flags,
1940 struct nfs4_state **res)
1941{
1942 struct nfs4_state_owner *sp = opendata->owner;
1943 struct nfs_server *server = sp->so_server;
1944 struct nfs4_state *state;
1945 unsigned int seq;
1946 int ret;
1947
1948 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1949
1950 ret = _nfs4_proc_open(opendata);
1951 if (ret != 0)
1952 goto out;
1953
1954 state = nfs4_opendata_to_nfs4_state(opendata);
1955 ret = PTR_ERR(state);
1956 if (IS_ERR(state))
1957 goto out;
1958 if (server->caps & NFS_CAP_POSIX_LOCK)
1959 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1960
1961 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1962 if (ret != 0)
1963 goto out;
1964
91876b13 1965 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1966 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1967 *res = state;
1968out:
1969 return ret;
1970}
1971
1da177e4 1972/*
24ac23ab 1973 * Returns a referenced nfs4_state
1da177e4 1974 */
82be417a
AA		 1975static int _nfs4_do_open(struct inode *dir,
1976 struct dentry *dentry,
1977 fmode_t fmode,
1978 int flags,
1979 struct iattr *sattr,
1980 struct rpc_cred *cred,
1981 struct nfs4_state **res,
1982 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1983{
1984 struct nfs4_state_owner *sp;
1985 struct nfs4_state *state = NULL;
1986 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1987 struct nfs4_opendata *opendata;
49f9a0fa 1988 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 1989 int status;
1da177e4
LT		 1990
1991 /* Protect against reboot recovery conflicts */
1da177e4 1992 status = -ENOMEM;
d1e284d5
TM		 1993 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1994 if (sp == NULL) {
1da177e4
LT		 1995 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1996 goto out_err;
1997 }
58d9714a
TM		 1998 status = nfs4_recover_expired_lease(server);
1999 if (status != 0)
b4454fe1 2000 goto err_put_state_owner;
82a2c1b7
AV		 2001 if (dentry->d_inode != NULL)
2002 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2003 status = -ENOMEM;
49f9a0fa
TM		 2004 if (dentry->d_inode)
2005 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2006 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 2007 claim, GFP_KERNEL);
e56e0b78 2008 if (opendata == NULL)
95d35cb4 2009 goto err_put_state_owner;
1da177e4 2010
82be417a
AA		 2011 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2012 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2013 if (!opendata->f_attr.mdsthreshold)
2014 goto err_opendata_put;
1549210f 2015 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2016 }
82a2c1b7
AV		 2017 if (dentry->d_inode != NULL)
2018 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2019
c21443c2 2020 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 2021 if (status != 0)
2022 goto err_opendata_put;
2023
549b19cc
TM		 2024 if ((opendata->o_arg.open_flags & O_EXCL) &&
2025 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2026 nfs4_exclusive_attrset(opendata, sattr);
2027
2028 nfs_fattr_init(opendata->o_res.f_attr);
2029 status = nfs4_do_setattr(state->inode, cred,
2030 opendata->o_res.f_attr, sattr,
2031 state);
2032 if (status == 0)
2033 nfs_setattr_update_inode(state->inode, sattr);
2034 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2035 }
82be417a
AA		 2036
2037 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2038 *ctx_th = opendata->f_attr.mdsthreshold;
2039 else
2040 kfree(opendata->f_attr.mdsthreshold);
2041 opendata->f_attr.mdsthreshold = NULL;
2042
c6d00e63 2043 nfs4_opendata_put(opendata);
1da177e4 2044 nfs4_put_state_owner(sp);
1da177e4
LT		 2045 *res = state;
2046 return 0;
c6d00e63 2047err_opendata_put:
82be417a 2048 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2049 nfs4_opendata_put(opendata);
e56e0b78
TM		 2050err_put_state_owner:
2051 nfs4_put_state_owner(sp);
1da177e4 2052out_err:
1da177e4
LT		 2053 *res = NULL;
2054 return status;
2055}
2056
2057
82be417a
AA		 2058static struct nfs4_state *nfs4_do_open(struct inode *dir,
2059 struct dentry *dentry,
2060 fmode_t fmode,
2061 int flags,
2062 struct iattr *sattr,
2063 struct rpc_cred *cred,
2064 struct nfs4_threshold **ctx_th)
1da177e4 2065{
49f9a0fa 2066 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2067 struct nfs4_exception exception = { };
2068 struct nfs4_state *res;
2069 int status;
2070
6168f62c 2071 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2072 do {
82be417a
AA		 2073 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2074 &res, ctx_th);
1da177e4
LT		 2075 if (status == 0)
2076 break;
2077 /* NOTE: BAD_SEQID means the server and client disagree about the
2078 * book-keeping w.r.t. state-changing operations
2079 * (OPEN/CLOSE/LOCK/LOCKU...)
2080 * It is actually a sign of a bug on the client or on the server.
2081 *
2082 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2083 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2084 * have unhashed the old state_owner for us, and that we can
2085 * therefore safely retry using a new one. We should still warn
2086 * the user though...
2087 */
2088 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2089 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2090 " returned a bad sequence-id error!\n",
2091 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2092 exception.retry = 1;
2093 continue;
2094 }
550f5747
TM		 2095 /*
2096 * BAD_STATEID on OPEN means that the server cancelled our
2097 * state before it received the OPEN_CONFIRM.
2098 * Recover by retrying the request as per the discussion
2099 * on Page 181 of RFC3530.
2100 */
2101 if (status == -NFS4ERR_BAD_STATEID) {
2102 exception.retry = 1;
2103 continue;
2104 }
aac00a8d
TM		 2105 if (status == -EAGAIN) {
2106 /* We must have found a delegation */
2107 exception.retry = 1;
2108 continue;
2109 }
49f9a0fa
TM		 2110 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2111 continue;
2112 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2113 status, &exception));
2114 } while (exception.retry);
2115 return res;
2116}
2117
659bfcd6
TM		 2118static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2119 struct nfs_fattr *fattr, struct iattr *sattr,
2120 struct nfs4_state *state)
1da177e4 2121{
3e4f6290 2122 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2123 struct nfs_setattrargs arg = {
3e4f6290 2124 .fh = NFS_FH(inode),
1da177e4
LT		 2125 .iap = sattr,
2126 .server = server,
2127 .bitmask = server->attr_bitmask,
2128 };
2129 struct nfs_setattrres res = {
2130 .fattr = fattr,
2131 .server = server,
2132 };
2133 struct rpc_message msg = {
659bfcd6
TM		 2134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2135 .rpc_argp = &arg,
2136 .rpc_resp = &res,
2137 .rpc_cred = cred,
1da177e4 2138 };
26e976a8 2139 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2140 fmode_t fmode;
2141 bool truncate;
65e4308d 2142 int status;
1da177e4 2143
0e574af1 2144 nfs_fattr_init(fattr);
1da177e4 2145
ee3ae84e
TM		 2146 /* Servers should only apply open mode checks for file size changes */
2147 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2148 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2149
2150 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2151 /* Use that stateid */
2152 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2153 struct nfs_lockowner lockowner = {
2154 .l_owner = current->files,
2155 .l_pid = current->tgid,
2156 };
4fc8796d 2157 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2158 &lockowner);
08e9eac4 2159 } else
f597c537 2160 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2161
7c513058 2162 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2163 if (status == 0 && state != NULL)
2164 renew_lease(server, timestamp);
65e4308d 2165 return status;
1da177e4
LT		 2166}
2167
659bfcd6
TM		 2168static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2169 struct nfs_fattr *fattr, struct iattr *sattr,
2170 struct nfs4_state *state)
1da177e4 2171{
3e4f6290 2172 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2173 struct nfs4_exception exception = {
2174 .state = state,
3114ea7a 2175 .inode = inode,
a1d0b5ee 2176 };
1da177e4
LT		 2177 int err;
2178 do {
451146be
TM		 2179 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2180 switch (err) {
2181 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2182 if (!(sattr->ia_valid & ATTR_SIZE)) {
2183 pr_warn_once("NFSv4: server %s is incorrectly "
2184 "applying open mode checks to "
2185 "a SETATTR that is not "
2186 "changing file size.\n",
2187 server->nfs_client->cl_hostname);
2188 }
451146be
TM		 2189 if (state && !(state->state & FMODE_WRITE)) {
2190 err = -EBADF;
2191 if (sattr->ia_valid & ATTR_OPEN)
2192 err = -EACCES;
2193 goto out;
2194 }
2195 }
2196 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2197 } while (exception.retry);
451146be 2198out:
1da177e4
LT		 2199 return err;
2200}
2201
2202struct nfs4_closedata {
2203 struct inode *inode;
2204 struct nfs4_state *state;
2205 struct nfs_closeargs arg;
2206 struct nfs_closeres res;
516a6af6 2207 struct nfs_fattr fattr;
26e976a8 2208 unsigned long timestamp;
f7e8917a
FI		 2209 bool roc;
2210 u32 roc_barrier;
1da177e4
LT		 2211};
2212
963d8fe5 2213static void nfs4_free_closedata(void *data)
9512135d 2214{
963d8fe5
TM		 2215 struct nfs4_closedata *calldata = data;
2216 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2217 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2218
f7e8917a
FI		 2219 if (calldata->roc)
2220 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2221 nfs4_put_open_state(calldata->state);
2222 nfs_free_seqid(calldata->arg.seqid);
9512135d 2223 nfs4_put_state_owner(sp);
322b2b90 2224 nfs_sb_deactive(sb);
9512135d
TM		 2225 kfree(calldata);
2226}
2227
88069f77
TM		 2228static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2229 fmode_t fmode)
2230{
2231 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2232 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2233 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2234 case FMODE_WRITE:
88069f77 2235 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2236 break;
2237 case FMODE_READ:
88069f77 2238 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2239 break;
2240 case 0:
2241 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2242 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2243 clear_bit(NFS_OPEN_STATE, &state->flags);
2244 }
88069f77
TM		 2245 spin_unlock(&state->owner->so_lock);
2246}
2247
963d8fe5 2248static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2249{
963d8fe5 2250 struct nfs4_closedata *calldata = data;
1da177e4 2251 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2252 struct nfs_server *server = NFS_SERVER(calldata->inode);
2253
a3ca5651 2254 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2255 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2256 return;
1da177e4
LT		 2257 /* hmm. we are done with the inode, and in the process of freeing
2258 * the state_owner. we keep this around to process errors
2259 */
1da177e4
LT		 2260 switch (task->tk_status) {
2261 case 0:
f7e8917a
FI		 2262 if (calldata->roc)
2263 pnfs_roc_set_barrier(state->inode,
2264 calldata->roc_barrier);
45328c35 2265 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2266 renew_lease(server, calldata->timestamp);
88069f77
TM		 2267 nfs4_close_clear_stateid_flags(state,
2268 calldata->arg.fmode);
1da177e4
LT		 2269 break;
2270 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2271 case -NFS4ERR_OLD_STATEID:
2272 case -NFS4ERR_BAD_STATEID:
1da177e4 2273 case -NFS4ERR_EXPIRED:
dc0b027d 2274 if (calldata->arg.fmode == 0)
9e33bed5 2275 break;
1da177e4 2276 default:
72211dbe
TM		 2277 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2278 rpc_restart_call_prepare(task);
1da177e4 2279 }
72211dbe 2280 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2281 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2282 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2283}
2284
4ce70ada 2285static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2286{
4ce70ada 2287 struct nfs4_closedata *calldata = data;
9512135d 2288 struct nfs4_state *state = calldata->state;
7fdab069 2289 struct inode *inode = calldata->inode;
569ae35a 2290 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2291 int call_close = 0;
9512135d 2292
a3ca5651 2293 dprintk("%s: begin!\n", __func__);
963d8fe5 2294 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2295 goto out_wait;
003707c7 2296
88069f77 2297 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2298 spin_lock(&state->owner->so_lock);
569ae35a
TM		 2299 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2300 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2301 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2302 /* Calculate the current open share mode */
2303 calldata->arg.fmode = 0;
2304 if (is_rdonly || is_rdwr)
2305 calldata->arg.fmode |= FMODE_READ;
2306 if (is_wronly || is_rdwr)
2307 calldata->arg.fmode |= FMODE_WRITE;
003707c7 2308 /* Calculate the change in open mode */
e7616923 2309 if (state->n_rdwr == 0) {
003707c7 2310 if (state->n_rdonly == 0) {
569ae35a 2311 call_close |= is_rdonly || is_rdwr;
88069f77 2312 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2313 }
2314 if (state->n_wronly == 0) {
569ae35a 2315 call_close |= is_wronly || is_rdwr;
88069f77 2316 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2317 }
e7616923 2318 }
5d422301
TM		 2319 if (!nfs4_valid_open_stateid(state))
2320 call_close = 0;
4cecb76f 2321 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2322
2323 if (!call_close) {
963d8fe5 2324 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2325 goto out_no_action;
9512135d 2326 }
88069f77 2327
f7e8917a 2328 if (calldata->arg.fmode == 0) {
88069f77 2329 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2330 if (calldata->roc &&
b9536ad5
AA		 2331 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2332 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2333 goto out_wait;
b9536ad5 2334 }
f7e8917a 2335 }
88069f77 2336
516a6af6 2337 nfs_fattr_init(calldata->res.fattr);
26e976a8 2338 calldata->timestamp = jiffies;
7fdab069 2339 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2340 &calldata->arg.seq_args,
2341 &calldata->res.seq_res,
2240a9e2
TM		 2342 task) != 0)
2343 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2344 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2345 return;
2346out_no_action:
2347 task->tk_action = NULL;
2348out_wait:
2349 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2350}
2351
963d8fe5 2352static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2353 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2354 .rpc_call_done = nfs4_close_done,
2355 .rpc_release = nfs4_free_closedata,
2356};
2357
1da177e4
LT		 2358/*
2359 * It is possible for data to be read/written from a mem-mapped file
2360 * after the sys_close call (which hits the vfs layer as a flush).
2361 * This means that we can't safely call nfsv4 close on a file until
2362 * the inode is cleared. This in turn means that we are not good
2363 * NFSv4 citizens - we do not indicate to the server to update the file's
2364 * share state even when we are done with one of the three share
2365 * stateid's in the inode.
2366 *
2367 * NOTE: Caller must be holding the sp->so_owner semaphore!
2368 */
1f7977c1 2369int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2370{
4a35bd41 2371 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2372 struct nfs4_closedata *calldata;
b39e625b
TM		 2373 struct nfs4_state_owner *sp = state->owner;
2374 struct rpc_task *task;
5138fde0
TM		 2375 struct rpc_message msg = {
2376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2377 .rpc_cred = state->owner->so_cred,
2378 };
c970aa85
TM		 2379 struct rpc_task_setup task_setup_data = {
2380 .rpc_client = server->client,
5138fde0 2381 .rpc_message = &msg,
c970aa85 2382 .callback_ops = &nfs4_close_ops,
101070ca 2383 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2384 .flags = RPC_TASK_ASYNC,
2385 };
9512135d 2386 int status = -ENOMEM;
1da177e4 2387
8535b2be 2388 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2389 if (calldata == NULL)
9512135d 2390 goto out;
9d12b216 2391 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2392 calldata->inode = state->inode;
1da177e4 2393 calldata->state = state;
4a35bd41 2394 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2395 calldata->arg.stateid = &state->open_stateid;
1da177e4 2396 /* Serialization for the sequence id */
8535b2be 2397 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2398 if (calldata->arg.seqid == NULL)
2399 goto out_free_calldata;
dc0b027d 2400 calldata->arg.fmode = 0;
a65318bf 2401 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2402 calldata->res.fattr = &calldata->fattr;
c1d51931 2403 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2404 calldata->res.server = server;
1f7977c1 2405 calldata->roc = pnfs_roc(state->inode);
643168c2 2406 nfs_sb_active(calldata->inode->i_sb);
9512135d 2407
1174dd1f
TM		 2408 msg.rpc_argp = &calldata->arg;
2409 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2410 task_setup_data.callback_data = calldata;
2411 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2412 if (IS_ERR(task))
2413 return PTR_ERR(task);
a49c3c77
TM		 2414 status = 0;
2415 if (wait)
2416 status = rpc_wait_for_completion_task(task);
b39e625b 2417 rpc_put_task(task);
a49c3c77 2418 return status;
9512135d
TM		 2419out_free_calldata:
2420 kfree(calldata);
2421out:
b39e625b
TM		 2422 nfs4_put_open_state(state);
2423 nfs4_put_state_owner(sp);
9512135d 2424 return status;
1da177e4
LT		 2425}
2426
2b484297 2427static struct inode *
cd9a1c0e 2428nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2429{
1da177e4 2430 struct nfs4_state *state;
1da177e4 2431
565277f6 2432 /* Protect against concurrent sillydeletes */
82be417a
AA		 2433 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2434 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2435 if (IS_ERR(state))
2436 return ERR_CAST(state);
cd9a1c0e 2437 ctx->state = state;
f46e0bd3 2438 return igrab(state->inode);
1da177e4
LT		 2439}
2440
1185a552 2441static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2442{
2443 if (ctx->state == NULL)
2444 return;
2445 if (is_sync)
643168c2 2446 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2447 else
643168c2 2448 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2449}
1da177e4
LT		 2450
2451static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2452{
43652ad5
BH		 2453 struct nfs4_server_caps_arg args = {
2454 .fhandle = fhandle,
2455 };
1da177e4
LT		 2456 struct nfs4_server_caps_res res = {};
2457 struct rpc_message msg = {
2458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2459 .rpc_argp = &args,
1da177e4
LT		 2460 .rpc_resp = &res,
2461 };
2462 int status;
2463
7c513058 2464 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2465 if (status == 0) {
2466 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2467 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2468 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2469 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2470 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2471 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2472 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2473 server->caps |= NFS_CAP_ACLS;
2474 if (res.has_links != 0)
2475 server->caps |= NFS_CAP_HARDLINKS;
2476 if (res.has_symlinks != 0)
2477 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2478 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2479 server->caps |= NFS_CAP_FILEID;
2480 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2481 server->caps |= NFS_CAP_MODE;
2482 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2483 server->caps |= NFS_CAP_NLINK;
2484 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2485 server->caps |= NFS_CAP_OWNER;
2486 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2487 server->caps |= NFS_CAP_OWNER_GROUP;
2488 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2489 server->caps |= NFS_CAP_ATIME;
2490 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2491 server->caps |= NFS_CAP_CTIME;
2492 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2493 server->caps |= NFS_CAP_MTIME;
2494
a65318bf
TM		 2495 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2496 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2497 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2498 server->acl_bitmask = res.acl_bitmask;
264e6351 2499 server->fh_expire_type = res.fh_expire_type;
1da177e4 2500 }
cccef3b9 2501
1da177e4
LT		 2502 return status;
2503}
2504
55a97593 2505int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2506{
2507 struct nfs4_exception exception = { };
2508 int err;
2509 do {
2510 err = nfs4_handle_exception(server,
2511 _nfs4_server_capabilities(server, fhandle),
2512 &exception);
2513 } while (exception.retry);
2514 return err;
2515}
2516
2517static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2518 struct nfs_fsinfo *info)
2519{
1da177e4
LT		 2520 struct nfs4_lookup_root_arg args = {
2521 .bitmask = nfs4_fattr_bitmap,
2522 };
2523 struct nfs4_lookup_res res = {
2524 .server = server,
0e574af1 2525 .fattr = info->fattr,
1da177e4
LT		 2526 .fh = fhandle,
2527 };
2528 struct rpc_message msg = {
2529 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2530 .rpc_argp = &args,
2531 .rpc_resp = &res,
2532 };
008f55d0 2533
0e574af1 2534 nfs_fattr_init(info->fattr);
7c513058 2535 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2536}
2537
2538static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2539 struct nfs_fsinfo *info)
2540{
2541 struct nfs4_exception exception = { };
2542 int err;
2543 do {
fb8a5ba8
BS		 2544 err = _nfs4_lookup_root(server, fhandle, info);
2545 switch (err) {
2546 case 0:
2547 case -NFS4ERR_WRONGSEC:
05e9cfb4 2548 goto out;
fb8a5ba8
BS		 2549 default:
2550 err = nfs4_handle_exception(server, err, &exception);
2551 }
1da177e4 2552 } while (exception.retry);
05e9cfb4 2553out:
1da177e4
LT		 2554 return err;
2555}
2556
8f70e95f
BS		 2557static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2558 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2559{
2560 struct rpc_auth *auth;
2561 int ret;
2562
2563 auth = rpcauth_create(flavor, server->client);
e8d920c5 2564 if (IS_ERR(auth)) {
75bc8821 2565 ret = -EACCES;
8f70e95f
BS		 2566 goto out;
2567 }
2568 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2569out:
2570 return ret;
2571}
2572
9a744ba3
CL		 2573/*
2574 * Retry pseudoroot lookup with various security flavors. We do this when:
2575 *
2576 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2577 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2578 *
2579 * Returns zero on success, or a negative NFS4ERR value, or a
2580 * negative errno value.
2581 */
801a16dc 2582static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2583 struct nfs_fsinfo *info)
1da177e4 2584{
9a744ba3
CL		 2585 /* Per 3530bis 15.33.5 */
2586 static const rpc_authflavor_t flav_array[] = {
2587 RPC_AUTH_GSS_KRB5P,
2588 RPC_AUTH_GSS_KRB5I,
2589 RPC_AUTH_GSS_KRB5,
c4eafe11 2590 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2591 RPC_AUTH_NULL,
2592 };
2593 int status = -EPERM;
2594 size_t i;
6a1a1e34 2595
9a744ba3 2596 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2597 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2598 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2599 continue;
2600 break;
8f70e95f 2601 }
9a744ba3 2602
fb8a5ba8
BS		 2603 /*
2604 * -EACCESS could mean that the user doesn't have correct permissions
2605 * to access the mount. It could also mean that we tried to mount
2606 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2607 * existing mount programs don't handle -EACCES very well so it should
2608 * be mapped to -EPERM instead.
2609 */
2610 if (status == -EACCES)
2611 status = -EPERM;
801a16dc
BS		 2612 return status;
2613}
2614
2ed4b95b
CL		 2615static int nfs4_do_find_root_sec(struct nfs_server *server,
2616 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2617{
2618 int mv = server->nfs_client->cl_minorversion;
2619 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2620}
2621
2622/**
2623 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2624 * @server: initialized nfs_server handle
2625 * @fhandle: we fill in the pseudo-fs root file handle
2626 * @info: we fill in an FSINFO struct
2627 *
2628 * Returns zero on success, or a negative errno.
801a16dc 2629 */
3028eb2b
BS		 2630int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2631 struct nfs_fsinfo *info)
801a16dc 2632{
2ed4b95b
CL		 2633 int status;
2634
2635 status = nfs4_lookup_root(server, fhandle, info);
2636 if ((status == -NFS4ERR_WRONGSEC) &&
2637 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2638 status = nfs4_do_find_root_sec(server, fhandle, info);
2639
1da177e4
LT		 2640 if (status == 0)
2641 status = nfs4_server_capabilities(server, fhandle);
2642 if (status == 0)
2643 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2644
c12e87f4 2645 return nfs4_map_errors(status);
1da177e4
LT		 2646}
2647
bae36241
BS		 2648static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2649 struct nfs_fsinfo *info)
2650{
2651 int error;
2652 struct nfs_fattr *fattr = info->fattr;
2653
2654 error = nfs4_server_capabilities(server, mntfh);
2655 if (error < 0) {
2656 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2657 return error;
2658 }
2659
2660 error = nfs4_proc_getattr(server, mntfh, fattr);
2661 if (error < 0) {
2662 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2663 return error;
2664 }
2665
2666 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2667 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2668 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2669
2670 return error;
2671}
2672
6b97fd3d
MN		 2673/*
2674 * Get locations and (maybe) other attributes of a referral.
2675 * Note that we'll actually follow the referral later when
2676 * we detect fsid mismatch in inode revalidation
2677 */
f05d147f
BS		 2678static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2679 const struct qstr *name, struct nfs_fattr *fattr,
2680 struct nfs_fh *fhandle)
6b97fd3d
MN		 2681{
2682 int status = -ENOMEM;
2683 struct page *page = NULL;
2684 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2685
2686 page = alloc_page(GFP_KERNEL);
2687 if (page == NULL)
2688 goto out;
2689 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2690 if (locations == NULL)
2691 goto out;
2692
f05d147f 2693 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2694 if (status != 0)
2695 goto out;
2696 /* Make sure server returned a different fsid for the referral */
2697 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2698 dprintk("%s: server did not return a different fsid for"
2699 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2700 status = -EIO;
2701 goto out;
2702 }
533eb461
AA		 2703 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2704 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2705
533eb461 2706 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2707 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2708 memset(fhandle, 0, sizeof(struct nfs_fh));
2709out:
2710 if (page)
2711 __free_page(page);
5d7ca35a 2712 kfree(locations);
6b97fd3d
MN		 2713 return status;
2714}
2715
1da177e4
LT		 2716static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2717{
2718 struct nfs4_getattr_arg args = {
2719 .fh = fhandle,
2720 .bitmask = server->attr_bitmask,
2721 };
2722 struct nfs4_getattr_res res = {
2723 .fattr = fattr,
2724 .server = server,
2725 };
2726 struct rpc_message msg = {
2727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2728 .rpc_argp = &args,
2729 .rpc_resp = &res,
2730 };
2731
0e574af1 2732 nfs_fattr_init(fattr);
7c513058 2733 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2734}
2735
2736static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2737{
2738 struct nfs4_exception exception = { };
2739 int err;
2740 do {
2741 err = nfs4_handle_exception(server,
2742 _nfs4_proc_getattr(server, fhandle, fattr),
2743 &exception);
2744 } while (exception.retry);
2745 return err;
2746}
2747
2748/*
2749 * The file is not closed if it is opened due to the a request to change
2750 * the size of the file. The open call will not be needed once the
2751 * VFS layer lookup-intents are implemented.
2752 *
2753 * Close is called when the inode is destroyed.
2754 * If we haven't opened the file for O_WRONLY, we
2755 * need to in the size_change case to obtain a stateid.
2756 *
2757 * Got race?
2758 * Because OPEN is always done by name in nfsv4, it is
2759 * possible that we opened a different file by the same
2760 * name. We can recognize this race condition, but we
2761 * can't do anything about it besides returning an error.
2762 *
2763 * This will be fixed with VFS changes (lookup-intent).
2764 */
2765static int
2766nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2767 struct iattr *sattr)
2768{
08e9eac4 2769 struct inode *inode = dentry->d_inode;
659bfcd6 2770 struct rpc_cred *cred = NULL;
d530838b 2771 struct nfs4_state *state = NULL;
1da177e4
LT		 2772 int status;
2773
8a1636c4 2774 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2775 pnfs_commit_and_return_layout(inode);
8a1636c4 2776
0e574af1 2777 nfs_fattr_init(fattr);
1da177e4 2778
2669940d
AA		 2779 /* Deal with open(O_TRUNC) */
2780 if (sattr->ia_valid & ATTR_OPEN)
2781 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2782
2783 /* Optimization: if the end result is no change, don't RPC */
2784 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2785 return 0;
2786
d530838b 2787 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2788 if (sattr->ia_valid & ATTR_FILE) {
2789 struct nfs_open_context *ctx;
2790
2791 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2792 if (ctx) {
2793 cred = ctx->cred;
2794 state = ctx->state;
2795 }
659bfcd6 2796 }
08e9eac4 2797
659bfcd6 2798 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2799 if (status == 0)
2800 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2801 return status;
2802}
2803
0c2e53f1
TM		 2804static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2805 const struct qstr *name, struct nfs_fh *fhandle,
2806 struct nfs_fattr *fattr)
2b3de441 2807{
0c2e53f1 2808 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2809 int status;
2810 struct nfs4_lookup_arg args = {
2811 .bitmask = server->attr_bitmask,
0c2e53f1 2812 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2813 .name = name,
2814 };
2815 struct nfs4_lookup_res res = {
2816 .server = server,
2817 .fattr = fattr,
2818 .fh = fhandle,
2819 };
2820 struct rpc_message msg = {
2821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2822 .rpc_argp = &args,
2823 .rpc_resp = &res,
2824 };
2825
2826 nfs_fattr_init(fattr);
2827
1da177e4 2828 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2829 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2830 dprintk("NFS reply lookup: %d\n", status);
2831 return status;
2832}
2833
72de53ec 2834static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2835{
7ebb9315 2836 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2837 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2838 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2839 fattr->nlink = 2;
2840}
2841
72de53ec
BS		 2842static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2843 struct qstr *name, struct nfs_fh *fhandle,
2844 struct nfs_fattr *fattr)
1da177e4
LT		 2845{
2846 struct nfs4_exception exception = { };
72de53ec 2847 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2848 int err;
2849 do {
72de53ec
BS		 2850 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2851 switch (err) {
08ef7bd3 2852 case -NFS4ERR_BADNAME:
72de53ec
BS		 2853 err = -ENOENT;
2854 goto out;
0c2e53f1 2855 case -NFS4ERR_MOVED:
f05d147f 2856 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2857 goto out;
0c2e53f1 2858 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2859 err = -EPERM;
2860 if (client != *clnt)
2861 goto out;
2862
2863 client = nfs4_create_sec_client(client, dir, name);
2864 if (IS_ERR(client))
2865 return PTR_ERR(client);
2866
2867 exception.retry = 1;
2868 break;
2869 default:
2870 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2871 }
1da177e4 2872 } while (exception.retry);
72de53ec
BS		 2873
2874out:
2875 if (err == 0)
2876 *clnt = client;
2877 else if (client != *clnt)
2878 rpc_shutdown_client(client);
2879
1da177e4
LT		 2880 return err;
2881}
2882
80a16b21 2883static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2884 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2885{
2886 int status;
2887 struct rpc_clnt *client = NFS_CLIENT(dir);
2888
2889 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2890 if (client != NFS_CLIENT(dir)) {
2891 rpc_shutdown_client(client);
2892 nfs_fixup_secinfo_attributes(fattr);
2893 }
2894 return status;
2895}
2896
f05d147f
BS		 2897struct rpc_clnt *
2898nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2899 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2900{
2901 int status;
2902 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2903
2904 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2905 if (status < 0) {
2906 rpc_shutdown_client(client);
2907 return ERR_PTR(status);
2908 }
2909 return client;
2910}
2911
1da177e4
LT		 2912static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2913{
76b32999 2914 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2915 struct nfs4_accessargs args = {
2916 .fh = NFS_FH(inode),
a4980e78 2917 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2918 };
2919 struct nfs4_accessres res = {
2920 .server = server,
1da177e4 2921 };
1da177e4
LT		 2922 struct rpc_message msg = {
2923 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2924 .rpc_argp = &args,
2925 .rpc_resp = &res,
2926 .rpc_cred = entry->cred,
2927 };
2928 int mode = entry->mask;
2929 int status;
2930
2931 /*
2932 * Determine which access bits we want to ask for...
2933 */
2934 if (mode & MAY_READ)
2935 args.access |= NFS4_ACCESS_READ;
2936 if (S_ISDIR(inode->i_mode)) {
2937 if (mode & MAY_WRITE)
2938 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2939 if (mode & MAY_EXEC)
2940 args.access |= NFS4_ACCESS_LOOKUP;
2941 } else {
2942 if (mode & MAY_WRITE)
2943 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2944 if (mode & MAY_EXEC)
2945 args.access |= NFS4_ACCESS_EXECUTE;
2946 }
c407d41a
TM		 2947
2948 res.fattr = nfs_alloc_fattr();
2949 if (res.fattr == NULL)
2950 return -ENOMEM;
2951
7c513058 2952 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2953 if (!status) {
6168f62c 2954 nfs_access_set_mask(entry, res.access);
c407d41a 2955 nfs_refresh_inode(inode, res.fattr);
1da177e4 2956 }
c407d41a 2957 nfs_free_fattr(res.fattr);
1da177e4
LT		 2958 return status;
2959}
2960
2961static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2962{
2963 struct nfs4_exception exception = { };
2964 int err;
2965 do {
2966 err = nfs4_handle_exception(NFS_SERVER(inode),
2967 _nfs4_proc_access(inode, entry),
2968 &exception);
2969 } while (exception.retry);
2970 return err;
2971}
2972
2973/*
2974 * TODO: For the time being, we don't try to get any attributes
2975 * along with any of the zero-copy operations READ, READDIR,
2976 * READLINK, WRITE.
2977 *
2978 * In the case of the first three, we want to put the GETATTR
2979 * after the read-type operation -- this is because it is hard
2980 * to predict the length of a GETATTR response in v4, and thus
2981 * align the READ data correctly. This means that the GETATTR
2982 * may end up partially falling into the page cache, and we should
2983 * shift it into the 'tail' of the xdr_buf before processing.
2984 * To do this efficiently, we need to know the total length
2985 * of data received, which doesn't seem to be available outside
2986 * of the RPC layer.
2987 *
2988 * In the case of WRITE, we also want to put the GETATTR after
2989 * the operation -- in this case because we want to make sure
140150db 2990 * we get the post-operation mtime and size.
1da177e4
LT		 2991 *
2992 * Both of these changes to the XDR layer would in fact be quite
2993 * minor, but I decided to leave them for a subsequent patch.
2994 */
2995static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2996 unsigned int pgbase, unsigned int pglen)
2997{
2998 struct nfs4_readlink args = {
2999 .fh = NFS_FH(inode),
3000 .pgbase = pgbase,
3001 .pglen = pglen,
3002 .pages = &page,
3003 };
f50c7000 3004 struct nfs4_readlink_res res;
1da177e4
LT		 3005 struct rpc_message msg = {
3006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3007 .rpc_argp = &args,
f50c7000 3008 .rpc_resp = &res,
1da177e4
LT		 3009 };
3010
7c513058 3011 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3012}
3013
3014static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3015 unsigned int pgbase, unsigned int pglen)
3016{
3017 struct nfs4_exception exception = { };
3018 int err;
3019 do {
3020 err = nfs4_handle_exception(NFS_SERVER(inode),
3021 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3022 &exception);
3023 } while (exception.retry);
3024 return err;
3025}
3026
1da177e4 3027/*
8867fe58 3028 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3029 */
1da177e4
LT		 3030static int
3031nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3032 int flags)
1da177e4 3033{
8867fe58 3034 struct nfs_open_context *ctx;
1da177e4 3035 struct nfs4_state *state;
1da177e4
LT		 3036 int status = 0;
3037
8867fe58
MS		 3038 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3039 if (IS_ERR(ctx))
3040 return PTR_ERR(ctx);
3041
a8a5da99 3042 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 3043 state = nfs4_do_open(dir, dentry, ctx->mode,
3044 flags, sattr, ctx->cred,
3045 &ctx->mdsthreshold);
d4d9cdcb 3046 d_drop(dentry);
1da177e4
LT		 3047 if (IS_ERR(state)) {
3048 status = PTR_ERR(state);
c0204fd2 3049 goto out;
1da177e4 3050 }
d4d9cdcb 3051 d_add(dentry, igrab(state->inode));
d75340cc 3052 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3053 ctx->state = state;
1da177e4 3054out:
8867fe58 3055 put_nfs_open_context(ctx);
1da177e4
LT		 3056 return status;
3057}
3058
3059static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3060{
16e42959 3061 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3062 struct nfs_removeargs args = {
1da177e4 3063 .fh = NFS_FH(dir),
26fe5750 3064 .name = *name,
16e42959 3065 };
4fdc17b2 3066 struct nfs_removeres res = {
16e42959 3067 .server = server,
1da177e4 3068 };
1da177e4 3069 struct rpc_message msg = {
4fdc17b2
TM		 3070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3071 .rpc_argp = &args,
3072 .rpc_resp = &res,
1da177e4 3073 };
778d2817 3074 int status;
1da177e4 3075
7c513058 3076 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3077 if (status == 0)
16e42959 3078 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3079 return status;
3080}
3081
3082static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3083{
3084 struct nfs4_exception exception = { };
3085 int err;
3086 do {
3087 err = nfs4_handle_exception(NFS_SERVER(dir),
3088 _nfs4_proc_remove(dir, name),
3089 &exception);
3090 } while (exception.retry);
3091 return err;
3092}
3093
e4eff1a6 3094static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3095{
e4eff1a6
TM		 3096 struct nfs_server *server = NFS_SERVER(dir);
3097 struct nfs_removeargs *args = msg->rpc_argp;
3098 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3099
e4eff1a6 3100 res->server = server;
1da177e4 3101 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3102 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3103}
3104
34e137cc
BS		 3105static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3106{
d9afbd1b
TM		 3107 nfs4_setup_sequence(NFS_SERVER(data->dir),
3108 &data->args.seq_args,
3109 &data->res.seq_res,
3110 task);
1da177e4
LT		 3111}
3112
e4eff1a6 3113static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3114{
e4eff1a6
TM		 3115 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3116
14516c3a
TM		 3117 if (!nfs4_sequence_done(task, &res->seq_res))
3118 return 0;
9e33bed5 3119 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3120 return 0;
3121 update_changeattr(dir, &res->cinfo);
e4eff1a6 3122 return 1;
1da177e4
LT		 3123}
3124
d3d4152a
JL		 3125static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3126{
3127 struct nfs_server *server = NFS_SERVER(dir);
3128 struct nfs_renameargs *arg = msg->rpc_argp;
3129 struct nfs_renameres *res = msg->rpc_resp;
3130
3131 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3132 res->server = server;
9d12b216 3133 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3134}
3135
c6bfa1a1
BS		 3136static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3137{
d9afbd1b
TM		 3138 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3139 &data->args.seq_args,
3140 &data->res.seq_res,
3141 task);
d3d4152a
JL		 3142}
3143
3144static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3145 struct inode *new_dir)
3146{
3147 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3148
3149 if (!nfs4_sequence_done(task, &res->seq_res))
3150 return 0;
3151 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3152 return 0;
3153
3154 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3155 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3156 return 1;
3157}
3158
1da177e4
LT		 3159static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3160 struct inode *new_dir, struct qstr *new_name)
3161{
6caf2c82 3162 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3163 struct nfs_renameargs arg = {
1da177e4
LT		 3164 .old_dir = NFS_FH(old_dir),
3165 .new_dir = NFS_FH(new_dir),
3166 .old_name = old_name,
3167 .new_name = new_name,
6caf2c82 3168 };
e8582a8b 3169 struct nfs_renameres res = {
6caf2c82 3170 .server = server,
1da177e4 3171 };
1da177e4
LT		 3172 struct rpc_message msg = {
3173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3174 .rpc_argp = &arg,
3175 .rpc_resp = &res,
3176 };
011fff72 3177 int status = -ENOMEM;
1da177e4 3178
7c513058 3179 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3180 if (!status) {
3181 update_changeattr(old_dir, &res.old_cinfo);
3182 update_changeattr(new_dir, &res.new_cinfo);
3183 }
3184 return status;
3185}
3186
3187static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3188 struct inode *new_dir, struct qstr *new_name)
3189{
3190 struct nfs4_exception exception = { };
3191 int err;
3192 do {
3193 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3194 _nfs4_proc_rename(old_dir, old_name,
3195 new_dir, new_name),
3196 &exception);
3197 } while (exception.retry);
3198 return err;
3199}
3200
3201static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3202{
91ba2eee 3203 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3204 struct nfs4_link_arg arg = {
3205 .fh = NFS_FH(inode),
3206 .dir_fh = NFS_FH(dir),
3207 .name = name,
91ba2eee
TM		 3208 .bitmask = server->attr_bitmask,
3209 };
91ba2eee
TM		 3210 struct nfs4_link_res res = {
3211 .server = server,
1da177e4 3212 };
1da177e4
LT		 3213 struct rpc_message msg = {
3214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3215 .rpc_argp = &arg,
91ba2eee 3216 .rpc_resp = &res,
1da177e4 3217 };
136f2627
TM		 3218 int status = -ENOMEM;
3219
3220 res.fattr = nfs_alloc_fattr();
778d2817 3221 if (res.fattr == NULL)
136f2627 3222 goto out;
1da177e4 3223
7c513058 3224 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3225 if (!status) {
3226 update_changeattr(dir, &res.cinfo);
73a3d07c 3227 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3228 }
136f2627 3229out:
136f2627 3230 nfs_free_fattr(res.fattr);
1da177e4
LT		 3231 return status;
3232}
3233
3234static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3235{
3236 struct nfs4_exception exception = { };
3237 int err;
3238 do {
3239 err = nfs4_handle_exception(NFS_SERVER(inode),
3240 _nfs4_proc_link(inode, dir, name),
3241 &exception);
3242 } while (exception.retry);
3243 return err;
3244}
3245
57dc9a57
TM		 3246struct nfs4_createdata {
3247 struct rpc_message msg;
3248 struct nfs4_create_arg arg;
3249 struct nfs4_create_res res;
3250 struct nfs_fh fh;
3251 struct nfs_fattr fattr;
57dc9a57
TM		 3252};
3253
3254static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3255 struct qstr *name, struct iattr *sattr, u32 ftype)
3256{
3257 struct nfs4_createdata *data;
3258
3259 data = kzalloc(sizeof(*data), GFP_KERNEL);
3260 if (data != NULL) {
3261 struct nfs_server *server = NFS_SERVER(dir);
3262
3263 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3264 data->msg.rpc_argp = &data->arg;
3265 data->msg.rpc_resp = &data->res;
3266 data->arg.dir_fh = NFS_FH(dir);
3267 data->arg.server = server;
3268 data->arg.name = name;
3269 data->arg.attrs = sattr;
3270 data->arg.ftype = ftype;
3271 data->arg.bitmask = server->attr_bitmask;
3272 data->res.server = server;
3273 data->res.fh = &data->fh;
3274 data->res.fattr = &data->fattr;
57dc9a57 3275 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3276 }
3277 return data;
3278}
3279
3280static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3281{
7c513058 3282 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3283 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3284 if (status == 0) {
3285 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3286 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3287 }
3288 return status;
3289}
3290
3291static void nfs4_free_createdata(struct nfs4_createdata *data)
3292{
3293 kfree(data);
3294}
3295
4f390c15 3296static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3297 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3298{
57dc9a57
TM		 3299 struct nfs4_createdata *data;
3300 int status = -ENAMETOOLONG;
1da177e4 3301
94a6d753 3302 if (len > NFS4_MAXPATHLEN)
57dc9a57 3303 goto out;
4f390c15 3304
57dc9a57
TM		 3305 status = -ENOMEM;
3306 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3307 if (data == NULL)
3308 goto out;
3309
3310 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3311 data->arg.u.symlink.pages = &page;
3312 data->arg.u.symlink.len = len;
1da177e4 3313
57dc9a57
TM		 3314 status = nfs4_do_create(dir, dentry, data);
3315
3316 nfs4_free_createdata(data);
3317out:
1da177e4
LT		 3318 return status;
3319}
3320
4f390c15 3321static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3322 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3323{
3324 struct nfs4_exception exception = { };
3325 int err;
3326 do {
3327 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3328 _nfs4_proc_symlink(dir, dentry, page,
3329 len, sattr),
1da177e4
LT		 3330 &exception);
3331 } while (exception.retry);
3332 return err;
3333}
3334
3335static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3336 struct iattr *sattr)
3337{
57dc9a57
TM		 3338 struct nfs4_createdata *data;
3339 int status = -ENOMEM;
1da177e4 3340
57dc9a57
TM		 3341 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3342 if (data == NULL)
3343 goto out;
3344
3345 status = nfs4_do_create(dir, dentry, data);
3346
3347 nfs4_free_createdata(data);
3348out:
1da177e4
LT		 3349 return status;
3350}
3351
3352static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3353 struct iattr *sattr)
3354{
3355 struct nfs4_exception exception = { };
3356 int err;
a8a5da99
AK		 3357
3358 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3359 do {
3360 err = nfs4_handle_exception(NFS_SERVER(dir),
3361 _nfs4_proc_mkdir(dir, dentry, sattr),
3362 &exception);
3363 } while (exception.retry);
3364 return err;
3365}
3366
3367static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3368 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3369{
3370 struct inode *dir = dentry->d_inode;
3371 struct nfs4_readdir_arg args = {
3372 .fh = NFS_FH(dir),
56e4ebf8 3373 .pages = pages,
1da177e4
LT		 3374 .pgbase = 0,
3375 .count = count,
96d25e53 3376 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3377 .plus = plus,
1da177e4
LT		 3378 };
3379 struct nfs4_readdir_res res;
3380 struct rpc_message msg = {
3381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3382 .rpc_argp = &args,
3383 .rpc_resp = &res,
3384 .rpc_cred = cred,
3385 };
3386 int status;
3387
3110ff80 3388 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3389 dentry->d_parent->d_name.name,
3390 dentry->d_name.name,
3391 (unsigned long long)cookie);
c3f52af3 3392 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3393 res.pgbase = args.pgbase;
7c513058 3394 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3395 if (status >= 0) {
c3f52af3 3396 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3397 status += args.pgbase;
3398 }
c4812998
TM		 3399
3400 nfs_invalidate_atime(dir);
3401
3110ff80 3402 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3403 return status;
3404}
3405
3406static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3407 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3408{
3409 struct nfs4_exception exception = { };
3410 int err;
3411 do {
3412 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3413 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3414 pages, count, plus),
1da177e4
LT		 3415 &exception);
3416 } while (exception.retry);
3417 return err;
3418}
3419
3420static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3421 struct iattr *sattr, dev_t rdev)
3422{
57dc9a57
TM		 3423 struct nfs4_createdata *data;
3424 int mode = sattr->ia_mode;
3425 int status = -ENOMEM;
1da177e4 3426
57dc9a57
TM		 3427 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3428 if (data == NULL)
3429 goto out;
3430
1da177e4 3431 if (S_ISFIFO(mode))
57dc9a57 3432 data->arg.ftype = NF4FIFO;
1da177e4 3433 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3434 data->arg.ftype = NF4BLK;
3435 data->arg.u.device.specdata1 = MAJOR(rdev);
3436 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3437 }
3438 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3439 data->arg.ftype = NF4CHR;
3440 data->arg.u.device.specdata1 = MAJOR(rdev);
3441 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3442 } else if (!S_ISSOCK(mode)) {
3443 status = -EINVAL;
3444 goto out_free;
1da177e4 3445 }
1da177e4 3446
57dc9a57 3447 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3448out_free:
57dc9a57
TM		 3449 nfs4_free_createdata(data);
3450out:
1da177e4
LT		 3451 return status;
3452}
3453
3454static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3455 struct iattr *sattr, dev_t rdev)
3456{
3457 struct nfs4_exception exception = { };
3458 int err;
a8a5da99
AK		 3459
3460 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3461 do {
3462 err = nfs4_handle_exception(NFS_SERVER(dir),
3463 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3464 &exception);
3465 } while (exception.retry);
3466 return err;
3467}
3468
3469static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3470 struct nfs_fsstat *fsstat)
3471{
3472 struct nfs4_statfs_arg args = {
3473 .fh = fhandle,
3474 .bitmask = server->attr_bitmask,
3475 };
24ad148a
BH		 3476 struct nfs4_statfs_res res = {
3477 .fsstat = fsstat,
3478 };
1da177e4
LT		 3479 struct rpc_message msg = {
3480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3481 .rpc_argp = &args,
24ad148a 3482 .rpc_resp = &res,
1da177e4
LT		 3483 };
3484
0e574af1 3485 nfs_fattr_init(fsstat->fattr);
7c513058 3486 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3487}
3488
3489static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3490{
3491 struct nfs4_exception exception = { };
3492 int err;
3493 do {
3494 err = nfs4_handle_exception(server,
3495 _nfs4_proc_statfs(server, fhandle, fsstat),
3496 &exception);
3497 } while (exception.retry);
3498 return err;
3499}
3500
3501static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3502 struct nfs_fsinfo *fsinfo)
3503{
3504 struct nfs4_fsinfo_arg args = {
3505 .fh = fhandle,
3506 .bitmask = server->attr_bitmask,
3507 };
3dda5e43
BH		 3508 struct nfs4_fsinfo_res res = {
3509 .fsinfo = fsinfo,
3510 };
1da177e4
LT		 3511 struct rpc_message msg = {
3512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3513 .rpc_argp = &args,
3dda5e43 3514 .rpc_resp = &res,
1da177e4
LT		 3515 };
3516
7c513058 3517 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3518}
3519
3520static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3521{
3522 struct nfs4_exception exception = { };
83ca7f5a 3523 unsigned long now = jiffies;
1da177e4
LT		 3524 int err;
3525
3526 do {
83ca7f5a
CL		 3527 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3528 if (err == 0) {
3529 struct nfs_client *clp = server->nfs_client;
3530
3531 spin_lock(&clp->cl_lock);
3532 clp->cl_lease_time = fsinfo->lease_time * HZ;
3533 clp->cl_last_renewal = now;
3534 spin_unlock(&clp->cl_lock);
3535 break;
3536 }
3537 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3538 } while (exception.retry);
3539 return err;
3540}
3541
3542static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3543{
e38eb650
BS		 3544 int error;
3545
0e574af1 3546 nfs_fattr_init(fsinfo->fattr);
e38eb650 3547 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3548 if (error == 0) {
3549 /* block layout checks this! */
3550 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3551 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3552 }
e38eb650
BS		 3553
3554 return error;
1da177e4
LT		 3555}
3556
3557static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3558 struct nfs_pathconf *pathconf)
3559{
3560 struct nfs4_pathconf_arg args = {
3561 .fh = fhandle,
3562 .bitmask = server->attr_bitmask,
3563 };
d45b2989
BH		 3564 struct nfs4_pathconf_res res = {
3565 .pathconf = pathconf,
3566 };
1da177e4
LT		 3567 struct rpc_message msg = {
3568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3569 .rpc_argp = &args,
d45b2989 3570 .rpc_resp = &res,
1da177e4
LT		 3571 };
3572
3573 /* None of the pathconf attributes are mandatory to implement */
3574 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3575 memset(pathconf, 0, sizeof(*pathconf));
3576 return 0;
3577 }
3578
0e574af1 3579 nfs_fattr_init(pathconf->fattr);
7c513058 3580 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3581}
3582
3583static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3584 struct nfs_pathconf *pathconf)
3585{
3586 struct nfs4_exception exception = { };
3587 int err;
3588
3589 do {
3590 err = nfs4_handle_exception(server,
3591 _nfs4_proc_pathconf(server, fhandle, pathconf),
3592 &exception);
3593 } while (exception.retry);
3594 return err;
3595}
3596
5521abfd 3597int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3598 const struct nfs_open_context *ctx,
3599 const struct nfs_lock_context *l_ctx,
3600 fmode_t fmode)
3601{
3602 const struct nfs_lockowner *lockowner = NULL;
3603
3604 if (l_ctx != NULL)
3605 lockowner = &l_ctx->lockowner;
5521abfd 3606 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3607}
3608EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3609
5521abfd
TM		 3610static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3611 const struct nfs_open_context *ctx,
3612 const struct nfs_lock_context *l_ctx,
3613 fmode_t fmode)
3614{
3615 nfs4_stateid current_stateid;
3616
c8dd8fdf
TM		 3617 /* If the current stateid represents a lost lock, then exit */
3618 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
3619 return true;
5521abfd
TM		 3620 return nfs4_stateid_match(stateid, &current_stateid);
3621}
3622
3623static bool nfs4_error_stateid_expired(int err)
3624{
3625 switch (err) {
3626 case -NFS4ERR_DELEG_REVOKED:
3627 case -NFS4ERR_ADMIN_REVOKED:
3628 case -NFS4ERR_BAD_STATEID:
3629 case -NFS4ERR_STALE_STATEID:
3630 case -NFS4ERR_OLD_STATEID:
3631 case -NFS4ERR_OPENMODE:
3632 case -NFS4ERR_EXPIRED:
3633 return true;
3634 }
3635 return false;
3636}
3637
d20581aa
BH		 3638void __nfs4_read_done_cb(struct nfs_read_data *data)
3639{
cd841605 3640 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3641}
3642
cbdabc7f 3643static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3644{
cd841605 3645 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3646
9e33bed5 3647 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3648 rpc_restart_call_prepare(task);
ec06c096 3649 return -EAGAIN;
1da177e4 3650 }
8850df99 3651
d20581aa 3652 __nfs4_read_done_cb(data);
1da177e4 3653 if (task->tk_status > 0)
ec06c096
TM		 3654 renew_lease(server, data->timestamp);
3655 return 0;
1da177e4
LT		 3656}
3657
5521abfd
TM		 3658static bool nfs4_read_stateid_changed(struct rpc_task *task,
3659 struct nfs_readargs *args)
3660{
3661
3662 if (!nfs4_error_stateid_expired(task->tk_status) ||
3663 nfs4_stateid_is_current(&args->stateid,
3664 args->context,
3665 args->lock_context,
3666 FMODE_READ))
3667 return false;
3668 rpc_restart_call_prepare(task);
3669 return true;
3670}
3671
cbdabc7f
AA		 3672static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3673{
3674
3675 dprintk("--> %s\n", __func__);
3676
3677 if (!nfs4_sequence_done(task, &data->res.seq_res))
3678 return -EAGAIN;
5521abfd
TM		 3679 if (nfs4_read_stateid_changed(task, &data->args))
3680 return -EAGAIN;
d20581aa
BH		 3681 return data->read_done_cb ? data->read_done_cb(task, data) :
3682 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3683}
3684
bdc7f021 3685static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3686{
1da177e4 3687 data->timestamp = jiffies;
cbdabc7f 3688 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3689 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3690 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3691}
3692
ea7c3303
BS		 3693static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3694{
9b206149 3695 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3696 &data->args.seq_args,
3697 &data->res.seq_res,
9b206149
TM		 3698 task))
3699 return;
3700 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3701 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3702}
3703
b029bc9b 3704static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3705{
cd841605 3706 struct inode *inode = data->header->inode;
1da177e4 3707
9e33bed5 3708 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3709 rpc_restart_call_prepare(task);
788e7a89 3710 return -EAGAIN;
1da177e4 3711 }
4f9838c7 3712 if (task->tk_status >= 0) {
1da177e4 3713 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3714 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3715 }
788e7a89 3716 return 0;
1da177e4
LT		 3717}
3718
5521abfd
TM		 3719static bool nfs4_write_stateid_changed(struct rpc_task *task,
3720 struct nfs_writeargs *args)
3721{
3722
3723 if (!nfs4_error_stateid_expired(task->tk_status) ||
3724 nfs4_stateid_is_current(&args->stateid,
3725 args->context,
3726 args->lock_context,
3727 FMODE_WRITE))
3728 return false;
3729 rpc_restart_call_prepare(task);
3730 return true;
3731}
3732
b029bc9b
FI		 3733static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3734{
3735 if (!nfs4_sequence_done(task, &data->res.seq_res))
3736 return -EAGAIN;
5521abfd
TM		 3737 if (nfs4_write_stateid_changed(task, &data->args))
3738 return -EAGAIN;
d20581aa
BH		 3739 return data->write_done_cb ? data->write_done_cb(task, data) :
3740 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3741}
3742
5a37f851
TM		 3743static
3744bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3745{
5a37f851
TM		 3746 const struct nfs_pgio_header *hdr = data->header;
3747
3748 /* Don't request attributes for pNFS or O_DIRECT writes */
3749 if (data->ds_clp != NULL || hdr->dreq != NULL)
3750 return false;
3751 /* Otherwise, request attributes if and only if we don't hold
3752 * a delegation
3753 */
011e2a7f 3754 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3755}
a69aef14 3756
bdc7f021 3757static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3758{
cd841605 3759 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3760
5a37f851 3761 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3762 data->args.bitmask = NULL;
3763 data->res.fattr = NULL;
3764 } else
3765 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3766
b029bc9b
FI		 3767 if (!data->write_done_cb)
3768 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3769 data->res.server = server;
1da177e4
LT		 3770 data->timestamp = jiffies;
3771
bdc7f021 3772 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3773 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3774}
3775
c6cb80d0
BS		 3776static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3777{
9b206149 3778 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3779 &data->args.seq_args,
3780 &data->res.seq_res,
9b206149
TM		 3781 task))
3782 return;
3783 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3784 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3785}
3786
0b7c0153 3787static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3788{
d9afbd1b
TM		 3789 nfs4_setup_sequence(NFS_SERVER(data->inode),
3790 &data->args.seq_args,
3791 &data->res.seq_res,
3792 task);
1da177e4
LT		 3793}
3794
0b7c0153 3795static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3796{
1da177e4 3797 struct inode *inode = data->inode;
14516c3a 3798
9e33bed5 3799 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3800 rpc_restart_call_prepare(task);
788e7a89 3801 return -EAGAIN;
1da177e4 3802 }
788e7a89 3803 return 0;
1da177e4
LT		 3804}
3805
0b7c0153 3806static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3807{
3808 if (!nfs4_sequence_done(task, &data->res.seq_res))
3809 return -EAGAIN;
0b7c0153 3810 return data->commit_done_cb(task, data);
5f452431
FI		 3811}
3812
0b7c0153 3813static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3814{
788e7a89 3815 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3816
0b7c0153
FI		 3817 if (data->commit_done_cb == NULL)
3818 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3819 data->res.server = server;
bdc7f021 3820 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3821 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3822}
3823
9bc4e3ca
CL		 3824struct nfs4_renewdata {
3825 struct nfs_client *client;
3826 unsigned long timestamp;
3827};
3828
1da177e4
LT		 3829/*
3830 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3831 * standalone procedure for queueing an asynchronous RENEW.
3832 */
9bc4e3ca 3833static void nfs4_renew_release(void *calldata)
dc96aef9 3834{
9bc4e3ca
CL		 3835 struct nfs4_renewdata *data = calldata;
3836 struct nfs_client *clp = data->client;
dc96aef9 3837
0851de06
AB		 3838 if (atomic_read(&clp->cl_count) > 1)
3839 nfs4_schedule_state_renewal(clp);
3840 nfs_put_client(clp);
9bc4e3ca 3841 kfree(data);
dc96aef9
AB		 3842}
3843
9bc4e3ca 3844static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3845{
9bc4e3ca
CL		 3846 struct nfs4_renewdata *data = calldata;
3847 struct nfs_client *clp = data->client;
3848 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3849
3850 if (task->tk_status < 0) {
95baa25c 3851 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3852 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3853 return;
3854 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3855 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3856 return;
3857 }
3858 nfs4_schedule_path_down_recovery(clp);
1da177e4 3859 }
452e9352 3860 do_renew_lease(clp, timestamp);
1da177e4
LT		 3861}
3862
963d8fe5
TM		 3863static const struct rpc_call_ops nfs4_renew_ops = {
3864 .rpc_call_done = nfs4_renew_done,
dc96aef9 3865 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3866};
3867
2f60ea6b 3868static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3869{
3870 struct rpc_message msg = {
3871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3872 .rpc_argp = clp,
b4454fe1 3873 .rpc_cred = cred,
1da177e4 3874 };
9bc4e3ca 3875 struct nfs4_renewdata *data;
1da177e4 3876
2f60ea6b
TM		 3877 if (renew_flags == 0)
3878 return 0;
0851de06
AB		 3879 if (!atomic_inc_not_zero(&clp->cl_count))
3880 return -EIO;
b569ad34 3881 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3882 if (data == NULL)
3883 return -ENOMEM;
3884 data->client = clp;
3885 data->timestamp = jiffies;
bc7a05ca 3886 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3887 &nfs4_renew_ops, data);
1da177e4
LT		 3888}
3889
8534d4ec 3890static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3891{
3892 struct rpc_message msg = {
3893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3894 .rpc_argp = clp,
b4454fe1 3895 .rpc_cred = cred,
1da177e4
LT		 3896 };
3897 unsigned long now = jiffies;
3898 int status;
3899
bc7a05ca 3900 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3901 if (status < 0)
3902 return status;
452e9352 3903 do_renew_lease(clp, now);
1da177e4
LT		 3904 return 0;
3905}
3906
aa1870af
BF		 3907static inline int nfs4_server_supports_acls(struct nfs_server *server)
3908{
3909 return (server->caps & NFS_CAP_ACLS)
3910 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3911 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3912}
3913
21f498c2
TM		 3914/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3915 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3916 * the stack.
3917 */
21f498c2 3918#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3919
e9e3d724
NH		 3920static int buf_to_pages_noslab(const void *buf, size_t buflen,
3921 struct page **pages, unsigned int *pgbase)
3922{
3923 struct page *newpage, **spages;
3924 int rc = 0;
3925 size_t len;
3926 spages = pages;
3927
3928 do {
21f498c2 3929 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3930 newpage = alloc_page(GFP_KERNEL);
3931
3932 if (newpage == NULL)
3933 goto unwind;
3934 memcpy(page_address(newpage), buf, len);
3935 buf += len;
3936 buflen -= len;
3937 *pages++ = newpage;
3938 rc++;
3939 } while (buflen != 0);
3940
3941 return rc;
3942
3943unwind:
3944 for(; rc > 0; rc--)
3945 __free_page(spages[rc-1]);
3946 return -ENOMEM;
3947}
3948
e50a1c2e
BF		 3949struct nfs4_cached_acl {
3950 int cached;
3951 size_t len;
3e9d4154 3952 char data[0];
e50a1c2e
BF		 3953};
3954
3955static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3956{
3957 struct nfs_inode *nfsi = NFS_I(inode);
3958
3959 spin_lock(&inode->i_lock);
3960 kfree(nfsi->nfs4_acl);
3961 nfsi->nfs4_acl = acl;
3962 spin_unlock(&inode->i_lock);
3963}
3964
3965static void nfs4_zap_acl_attr(struct inode *inode)
3966{
3967 nfs4_set_cached_acl(inode, NULL);
3968}
3969
3970static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3971{
3972 struct nfs_inode *nfsi = NFS_I(inode);
3973 struct nfs4_cached_acl *acl;
3974 int ret = -ENOENT;
3975
3976 spin_lock(&inode->i_lock);
3977 acl = nfsi->nfs4_acl;
3978 if (acl == NULL)
3979 goto out;
3980 if (buf == NULL) /* user is just asking for length */
3981 goto out_len;
3982 if (acl->cached == 0)
3983 goto out;
3984 ret = -ERANGE; /* see getxattr(2) man page */
3985 if (acl->len > buflen)
3986 goto out;
3987 memcpy(buf, acl->data, acl->len);
3988out_len:
3989 ret = acl->len;
3990out:
3991 spin_unlock(&inode->i_lock);
3992 return ret;
3993}
3994
5794d21e 3995static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3996{
3997 struct nfs4_cached_acl *acl;
b291f1b1 3998 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3999
1f1ea6c2 4000 if (buflen <= PAGE_SIZE) {
b291f1b1 4001 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4002 if (acl == NULL)
4003 goto out;
4004 acl->cached = 1;
5794d21e 4005 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4006 } else {
4007 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4008 if (acl == NULL)
4009 goto out;
4010 acl->cached = 0;
4011 }
4012 acl->len = acl_len;
4013out:
4014 nfs4_set_cached_acl(inode, acl);
4015}
4016
bf118a34
AA		 4017/*
4018 * The getxattr API returns the required buffer length when called with a
4019 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4020 * the required buf. On a NULL buf, we send a page of data to the server
4021 * guessing that the ACL request can be serviced by a page. If so, we cache
4022 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4023 * the cache. If not so, we throw away the page, and cache the required
4024 * length. The next getxattr call will then produce another round trip to
4025 * the server, this time with the input buf of the required size.
4026 */
16b4289c 4027static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4028{
bf118a34 4029 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4030 struct nfs_getaclargs args = {
4031 .fh = NFS_FH(inode),
4032 .acl_pages = pages,
4033 .acl_len = buflen,
4034 };
663c79b3
BH		 4035 struct nfs_getaclres res = {
4036 .acl_len = buflen,
4037 };
aa1870af
BF		 4038 struct rpc_message msg = {
4039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4040 .rpc_argp = &args,
663c79b3 4041 .rpc_resp = &res,
aa1870af 4042 };
21f498c2
TM		 4043 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4044 int ret = -ENOMEM, i;
aa1870af 4045
bf118a34
AA		 4046 /* As long as we're doing a round trip to the server anyway,
4047 * let's be prepared for a page of acl data. */
4048 if (npages == 0)
4049 npages = 1;
21f498c2
TM		 4050 if (npages > ARRAY_SIZE(pages))
4051 return -ERANGE;
5a006899 4052
bf118a34
AA		 4053 for (i = 0; i < npages; i++) {
4054 pages[i] = alloc_page(GFP_KERNEL);
4055 if (!pages[i])
4056 goto out_free;
e50a1c2e 4057 }
5a006899
SP		 4058
4059 /* for decoding across pages */
4060 res.acl_scratch = alloc_page(GFP_KERNEL);
4061 if (!res.acl_scratch)
4062 goto out_free;
4063
bf118a34
AA		 4064 args.acl_len = npages * PAGE_SIZE;
4065 args.acl_pgbase = 0;
5a006899 4066
de040bec 4067 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4068 __func__, buf, buflen, npages, args.acl_len);
4069 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4070 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4071 if (ret)
4072 goto out_free;
bf118a34 4073
1f1ea6c2
TM		 4074 /* Handle the case where the passed-in buffer is too short */
4075 if (res.acl_flags & NFS4_ACL_TRUNC) {
4076 /* Did the user only issue a request for the acl length? */
4077 if (buf == NULL)
4078 goto out_ok;
e50a1c2e 4079 ret = -ERANGE;
1f1ea6c2 4080 goto out_free;
e50a1c2e 4081 }
1f1ea6c2 4082 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4083 if (buf) {
4084 if (res.acl_len > buflen) {
4085 ret = -ERANGE;
4086 goto out_free;
4087 }
1f1ea6c2 4088 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4089 }
1f1ea6c2
TM		 4090out_ok:
4091 ret = res.acl_len;
e50a1c2e 4092out_free:
bf118a34
AA		 4093 for (i = 0; i < npages; i++)
4094 if (pages[i])
4095 __free_page(pages[i]);
331818f1
TM		 4096 if (res.acl_scratch)
4097 __free_page(res.acl_scratch);
aa1870af
BF		 4098 return ret;
4099}
4100
16b4289c
TM		 4101static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4102{
4103 struct nfs4_exception exception = { };
4104 ssize_t ret;
4105 do {
4106 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4107 if (ret >= 0)
4108 break;
4109 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4110 } while (exception.retry);
4111 return ret;
4112}
4113
e50a1c2e
BF		 4114static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4115{
4116 struct nfs_server *server = NFS_SERVER(inode);
4117 int ret;
4118
4119 if (!nfs4_server_supports_acls(server))
4120 return -EOPNOTSUPP;
4121 ret = nfs_revalidate_inode(server, inode);
4122 if (ret < 0)
4123 return ret;
08a22b39
AK		 4124 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4125 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4126 ret = nfs4_read_cached_acl(inode, buf, buflen);
4127 if (ret != -ENOENT)
bf118a34
AA		 4128 /* -ENOENT is returned if there is no ACL or if there is an ACL
4129 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4130 return ret;
4131 return nfs4_get_acl_uncached(inode, buf, buflen);
4132}
4133
16b4289c 4134static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4135{
4136 struct nfs_server *server = NFS_SERVER(inode);
4137 struct page *pages[NFS4ACL_MAXPAGES];
4138 struct nfs_setaclargs arg = {
4139 .fh = NFS_FH(inode),
4140 .acl_pages = pages,
4141 .acl_len = buflen,
4142 };
73c403a9 4143 struct nfs_setaclres res;
4b580ee3
BF		 4144 struct rpc_message msg = {
4145 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4146 .rpc_argp = &arg,
73c403a9 4147 .rpc_resp = &res,
4b580ee3 4148 };
21f498c2 4149 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4150 int ret, i;
4b580ee3
BF		 4151
4152 if (!nfs4_server_supports_acls(server))
4153 return -EOPNOTSUPP;
21f498c2
TM		 4154 if (npages > ARRAY_SIZE(pages))
4155 return -ERANGE;
e9e3d724
NH		 4156 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4157 if (i < 0)
4158 return i;
57ec14c5 4159 nfs4_inode_return_delegation(inode);
7c513058 4160 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4161
4162 /*
4163 * Free each page after tx, so the only ref left is
4164 * held by the network stack
4165 */
4166 for (; i > 0; i--)
4167 put_page(pages[i-1]);
4168
08a22b39
AK		 4169 /*
4170 * Acl update can result in inode attribute update.
4171 * so mark the attribute cache invalid.
4172 */
4173 spin_lock(&inode->i_lock);
4174 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4175 spin_unlock(&inode->i_lock);
f41f7418
TM		 4176 nfs_access_zap_cache(inode);
4177 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4178 return ret;
4179}
4180
16b4289c
TM		 4181static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4182{
4183 struct nfs4_exception exception = { };
4184 int err;
4185 do {
4186 err = nfs4_handle_exception(NFS_SERVER(inode),
4187 __nfs4_proc_set_acl(inode, buf, buflen),
4188 &exception);
4189 } while (exception.retry);
4190 return err;
4191}
4192
1da177e4 4193static int
aa5190d0 4194nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4195{
aa5190d0
TM		 4196 struct nfs_client *clp = server->nfs_client;
4197
4198 if (task->tk_status >= 0)
1da177e4
LT		 4199 return 0;
4200 switch(task->tk_status) {
a1d0b5ee 4201 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4202 case -NFS4ERR_ADMIN_REVOKED:
4203 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4204 if (state == NULL)
4205 break;
4206 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4207 case -NFS4ERR_OPENMODE:
4208 if (state == NULL)
4209 break;
5d422301
TM		 4210 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4211 goto stateid_invalid;
0400a6b0 4212 goto wait_on_recovery;
0ced63d1 4213 case -NFS4ERR_EXPIRED:
5d422301
TM		 4214 if (state != NULL) {
4215 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4216 goto stateid_invalid;
4217 }
1da177e4 4218 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4219 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4220 nfs4_schedule_lease_recovery(clp);
4221 goto wait_on_recovery;
4745e315
AA		 4222#if defined(CONFIG_NFS_V4_1)
4223 case -NFS4ERR_BADSESSION:
4224 case -NFS4ERR_BADSLOT:
4225 case -NFS4ERR_BAD_HIGH_SLOT:
4226 case -NFS4ERR_DEADSESSION:
4227 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4228 case -NFS4ERR_SEQ_FALSE_RETRY:
4229 case -NFS4ERR_SEQ_MISORDERED:
4230 dprintk("%s ERROR %d, Reset session\n", __func__,
4231 task->tk_status);
9f594791 4232 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
39be1c3d 4233 goto wait_on_recovery;
4745e315 4234#endif /* CONFIG_NFS_V4_1 */
1da177e4 4235 case -NFS4ERR_DELAY:
aa5190d0 4236 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4237 case -NFS4ERR_GRACE:
1da177e4
LT		 4238 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4239 task->tk_status = 0;
4240 return -EAGAIN;
a8a4ae3a 4241 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4242 case -NFS4ERR_OLD_STATEID:
4243 task->tk_status = 0;
4244 return -EAGAIN;
4245 }
4246 task->tk_status = nfs4_map_errors(task->tk_status);
4247 return 0;
5d422301
TM		 4248stateid_invalid:
4249 task->tk_status = -EIO;
4250 return 0;
0400a6b0 4251wait_on_recovery:
a2c0b9e2 4252 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4253 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4254 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4255 task->tk_status = 0;
4256 return -EAGAIN;
1da177e4
LT		 4257}
4258
f092075d
CL		 4259static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4260 nfs4_verifier *bootverf)
cd93710e
CL		 4261{
4262 __be32 verf[2];
4263
2c820d9a
CL		 4264 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4265 /* An impossible timestamp guarantees this value
4266 * will never match a generated boot time. */
4267 verf[0] = 0;
4268 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4269 } else {
f092075d
CL		 4270 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4271 verf[0] = (__be32)nn->boot_time.tv_sec;
4272 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4273 }
cd93710e
CL		 4274 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4275}
4276
e984a55a
CL		 4277static unsigned int
4278nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4279 char *buf, size_t len)
4280{
4281 unsigned int result;
4282
4283 rcu_read_lock();
4284 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4285 clp->cl_ipaddr,
4286 rpc_peeraddr2str(clp->cl_rpcclient,
4287 RPC_DISPLAY_ADDR),
4288 rpc_peeraddr2str(clp->cl_rpcclient,
4289 RPC_DISPLAY_PROTO));
4290 rcu_read_unlock();
4291 return result;
4292}
4293
4294static unsigned int
4295nfs4_init_uniform_client_string(const struct nfs_client *clp,
4296 char *buf, size_t len)
4297{
6f2ea7f2
CL		 4298 char *nodename = clp->cl_rpcclient->cl_nodename;
4299
4300 if (nfs4_client_id_uniquifier[0] != '\0')
4301 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4302 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4303 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4304 nodename);
e984a55a
CL		 4305}
4306
6bbb4ae8
CL		 4307/**
4308 * nfs4_proc_setclientid - Negotiate client ID
4309 * @clp: state data structure
4310 * @program: RPC program for NFSv4 callback service
4311 * @port: IP port number for NFS4 callback service
4312 * @cred: RPC credential to use for this call
4313 * @res: where to place the result
4314 *
4315 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4316 */
bb8b27e5
TM		 4317int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4318 unsigned short port, struct rpc_cred *cred,
4319 struct nfs4_setclientid_res *res)
1da177e4
LT		 4320{
4321 nfs4_verifier sc_verifier;
4322 struct nfs4_setclientid setclientid = {
4323 .sc_verifier = &sc_verifier,
4324 .sc_prog = program,
f4eecd5d 4325 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4326 };
4327 struct rpc_message msg = {
4328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4329 .rpc_argp = &setclientid,
bb8b27e5 4330 .rpc_resp = res,
286d7d6a 4331 .rpc_cred = cred,
1da177e4 4332 };
6bbb4ae8 4333 int status;
1da177e4 4334
de734831 4335 /* nfs_client_id4 */
f092075d 4336 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4337 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4338 setclientid.sc_name_len =
4339 nfs4_init_uniform_client_string(clp,
4340 setclientid.sc_name,
4341 sizeof(setclientid.sc_name));
4342 else
4343 setclientid.sc_name_len =
4344 nfs4_init_nonuniform_client_string(clp,
4345 setclientid.sc_name,
4346 sizeof(setclientid.sc_name));
de734831 4347 /* cb_client4 */
e984a55a 4348 rcu_read_lock();
de734831 4349 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4350 sizeof(setclientid.sc_netid),
4351 rpc_peeraddr2str(clp->cl_rpcclient,
4352 RPC_DISPLAY_NETID));
de734831
CL		 4353 rcu_read_unlock();
4354 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4355 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4356 clp->cl_ipaddr, port >> 8, port & 255);
4357
6bbb4ae8
CL		 4358 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4359 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4360 setclientid.sc_name_len, setclientid.sc_name);
4361 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4362 dprintk("NFS reply setclientid: %d\n", status);
4363 return status;
1da177e4
LT		 4364}
4365
6bbb4ae8
CL		 4366/**
4367 * nfs4_proc_setclientid_confirm - Confirm client ID
4368 * @clp: state data structure
4369 * @res: result of a previous SETCLIENTID
4370 * @cred: RPC credential to use for this call
4371 *
4372 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4373 */
fd954ae1 4374int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4375 struct nfs4_setclientid_res *arg,
4376 struct rpc_cred *cred)
1da177e4 4377{
1da177e4
LT		 4378 struct rpc_message msg = {
4379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4380 .rpc_argp = arg,
286d7d6a 4381 .rpc_cred = cred,
1da177e4 4382 };
1da177e4
LT		 4383 int status;
4384
6bbb4ae8
CL		 4385 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4386 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4387 clp->cl_clientid);
1bd714f2 4388 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4389 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4390 return status;
4391}
4392
fe650407
TM		 4393struct nfs4_delegreturndata {
4394 struct nfs4_delegreturnargs args;
fa178f29 4395 struct nfs4_delegreturnres res;
fe650407
TM		 4396 struct nfs_fh fh;
4397 nfs4_stateid stateid;
26e976a8 4398 unsigned long timestamp;
fa178f29 4399 struct nfs_fattr fattr;
fe650407
TM		 4400 int rpc_status;
4401};
4402
fe650407
TM		 4403static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4404{
4405 struct nfs4_delegreturndata *data = calldata;
938e1010 4406
14516c3a
TM		 4407 if (!nfs4_sequence_done(task, &data->res.seq_res))
4408 return;
938e1010 4409
79708861 4410 switch (task->tk_status) {
79708861 4411 case 0:
fa178f29 4412 renew_lease(data->res.server, data->timestamp);
79708861 4413 break;
0d08c381
TM		 4414 case -NFS4ERR_ADMIN_REVOKED:
4415 case -NFS4ERR_DELEG_REVOKED:
4416 case -NFS4ERR_BAD_STATEID:
4417 case -NFS4ERR_OLD_STATEID:
4418 case -NFS4ERR_STALE_STATEID:
4419 case -NFS4ERR_EXPIRED:
4420 task->tk_status = 0;
4421 break;
79708861
RL		 4422 default:
4423 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4424 -EAGAIN) {
d00c5d43 4425 rpc_restart_call_prepare(task);
79708861
RL		 4426 return;
4427 }
4428 }
4429 data->rpc_status = task->tk_status;
fe650407
TM		 4430}
4431
4432static void nfs4_delegreturn_release(void *calldata)
4433{
fe650407
TM		 4434 kfree(calldata);
4435}
4436
938e1010
AA		 4437#if defined(CONFIG_NFS_V4_1)
4438static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4439{
4440 struct nfs4_delegreturndata *d_data;
4441
4442 d_data = (struct nfs4_delegreturndata *)data;
4443
d9afbd1b
TM		 4444 nfs4_setup_sequence(d_data->res.server,
4445 &d_data->args.seq_args,
4446 &d_data->res.seq_res,
4447 task);
938e1010
AA		 4448}
4449#endif /* CONFIG_NFS_V4_1 */
4450
c8d149f3 4451static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4452#if defined(CONFIG_NFS_V4_1)
4453 .rpc_call_prepare = nfs4_delegreturn_prepare,
4454#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4455 .rpc_call_done = nfs4_delegreturn_done,
4456 .rpc_release = nfs4_delegreturn_release,
4457};
4458
e6f81075 4459static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4460{
4461 struct nfs4_delegreturndata *data;
fa178f29 4462 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4463 struct rpc_task *task;
5138fde0
TM		 4464 struct rpc_message msg = {
4465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4466 .rpc_cred = cred,
4467 };
c970aa85
TM		 4468 struct rpc_task_setup task_setup_data = {
4469 .rpc_client = server->client,
5138fde0 4470 .rpc_message = &msg,
c970aa85
TM		 4471 .callback_ops = &nfs4_delegreturn_ops,
4472 .flags = RPC_TASK_ASYNC,
4473 };
e6f81075 4474 int status = 0;
fe650407 4475
8535b2be 4476 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4477 if (data == NULL)
4478 return -ENOMEM;
9d12b216 4479 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4480 data->args.fhandle = &data->fh;
4481 data->args.stateid = &data->stateid;
9e907fec 4482 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4483 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4484 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4485 data->res.fattr = &data->fattr;
4486 data->res.server = server;
5138fde0 4487 nfs_fattr_init(data->res.fattr);
26e976a8 4488 data->timestamp = jiffies;
fe650407
TM		 4489 data->rpc_status = 0;
4490
c970aa85 4491 task_setup_data.callback_data = data;
1174dd1f
TM		 4492 msg.rpc_argp = &data->args;
4493 msg.rpc_resp = &data->res;
c970aa85 4494 task = rpc_run_task(&task_setup_data);
7a1218a2 4495 if (IS_ERR(task))
fe650407 4496 return PTR_ERR(task);
e6f81075
TM		 4497 if (!issync)
4498 goto out;
fe650407 4499 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4500 if (status != 0)
4501 goto out;
4502 status = data->rpc_status;
e144cbcc
TM		 4503 if (status == 0)
4504 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4505 else
4506 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4507out:
e6b3c4db 4508 rpc_put_task(task);
fe650407 4509 return status;
1da177e4
LT		 4510}
4511
e6f81075 4512int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4513{
4514 struct nfs_server *server = NFS_SERVER(inode);
4515 struct nfs4_exception exception = { };
4516 int err;
4517 do {
e6f81075 4518 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4519 switch (err) {
4520 case -NFS4ERR_STALE_STATEID:
4521 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4522 case 0:
4523 return 0;
4524 }
4525 err = nfs4_handle_exception(server, err, &exception);
4526 } while (exception.retry);
4527 return err;
4528}
4529
4530#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4531#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4532
4533/*
4534 * sleep, with exponential backoff, and retry the LOCK operation.
4535 */
4536static unsigned long
4537nfs4_set_lock_task_retry(unsigned long timeout)
4538{
6fa3eb70 4539 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 4540 timeout <<= 1;
4541 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4542 return NFS4_LOCK_MAXTIMEOUT;
4543 return timeout;
4544}
4545
1da177e4
LT		 4546static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4547{
4548 struct inode *inode = state->inode;
4549 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4550 struct nfs_client *clp = server->nfs_client;
911d1aaf 4551 struct nfs_lockt_args arg = {
1da177e4 4552 .fh = NFS_FH(inode),
911d1aaf 4553 .fl = request,
1da177e4 4554 };
911d1aaf
TM		 4555 struct nfs_lockt_res res = {
4556 .denied = request,
1da177e4
LT		 4557 };
4558 struct rpc_message msg = {
4559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4560 .rpc_argp = &arg,
4561 .rpc_resp = &res,
4562 .rpc_cred = state->owner->so_cred,
4563 };
1da177e4
LT		 4564 struct nfs4_lock_state *lsp;
4565 int status;
4566
911d1aaf 4567 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4568 status = nfs4_set_lock_state(state, request);
4569 if (status != 0)
4570 goto out;
4571 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4572 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4573 arg.lock_owner.s_dev = server->s_dev;
7c513058 4574 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4575 switch (status) {
4576 case 0:
4577 request->fl_type = F_UNLCK;
4578 break;
4579 case -NFS4ERR_DENIED:
4580 status = 0;
1da177e4 4581 }
70cc6487 4582 request->fl_ops->fl_release_private(request);
55fce163 4583 request->fl_ops = NULL;
8d0a8a9d 4584out:
1da177e4
LT		 4585 return status;
4586}
4587
4588static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4589{
4590 struct nfs4_exception exception = { };
4591 int err;
4592
4593 do {
4594 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4595 _nfs4_proc_getlk(state, cmd, request),
4596 &exception);
4597 } while (exception.retry);
4598 return err;
4599}
4600
4601static int do_vfs_lock(struct file *file, struct file_lock *fl)
4602{
4603 int res = 0;
4604 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4605 case FL_POSIX:
4606 res = posix_lock_file_wait(file, fl);
4607 break;
4608 case FL_FLOCK:
4609 res = flock_lock_file_wait(file, fl);
4610 break;
4611 default:
4612 BUG();
4613 }
1da177e4
LT		 4614 return res;
4615}
4616
faf5f49c 4617struct nfs4_unlockdata {
911d1aaf
TM		 4618 struct nfs_locku_args arg;
4619 struct nfs_locku_res res;
faf5f49c
TM		 4620 struct nfs4_lock_state *lsp;
4621 struct nfs_open_context *ctx;
911d1aaf
TM		 4622 struct file_lock fl;
4623 const struct nfs_server *server;
26e976a8 4624 unsigned long timestamp;
faf5f49c
TM		 4625};
4626
911d1aaf
TM		 4627static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4628 struct nfs_open_context *ctx,
4629 struct nfs4_lock_state *lsp,
4630 struct nfs_seqid *seqid)
4631{
4632 struct nfs4_unlockdata *p;
4633 struct inode *inode = lsp->ls_state->inode;
4634
8535b2be 4635 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4636 if (p == NULL)
4637 return NULL;
4638 p->arg.fh = NFS_FH(inode);
4639 p->arg.fl = &p->fl;
4640 p->arg.seqid = seqid;
c1d51931 4641 p->res.seqid = seqid;
911d1aaf
TM		 4642 p->arg.stateid = &lsp->ls_stateid;
4643 p->lsp = lsp;
4644 atomic_inc(&lsp->ls_count);
4645 /* Ensure we don't close file until we're done freeing locks! */
4646 p->ctx = get_nfs_open_context(ctx);
4647 memcpy(&p->fl, fl, sizeof(p->fl));
4648 p->server = NFS_SERVER(inode);
4649 return p;
4650}
4651
06f814a3 4652static void nfs4_locku_release_calldata(void *data)
faf5f49c 4653{
963d8fe5 4654 struct nfs4_unlockdata *calldata = data;
911d1aaf 4655 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4656 nfs4_put_lock_state(calldata->lsp);
4657 put_nfs_open_context(calldata->ctx);
4658 kfree(calldata);
faf5f49c
TM		 4659}
4660
963d8fe5 4661static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4662{
963d8fe5 4663 struct nfs4_unlockdata *calldata = data;
faf5f49c 4664
14516c3a
TM		 4665 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4666 return;
faf5f49c
TM		 4667 switch (task->tk_status) {
4668 case 0:
f597c537
TM		 4669 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4670 &calldata->res.stateid);
26e976a8 4671 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4672 break;
9e33bed5
TM		 4673 case -NFS4ERR_BAD_STATEID:
4674 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4675 case -NFS4ERR_STALE_STATEID:
4676 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4677 break;
4678 default:
9e33bed5 4679 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4680 rpc_restart_call_prepare(task);
faf5f49c 4681 }
2b1bc308 4682 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4683}
4684
4ce70ada 4685static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4686{
4ce70ada 4687 struct nfs4_unlockdata *calldata = data;
faf5f49c 4688
911d1aaf 4689 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4690 goto out_wait;
795a88c9 4691 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4692 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4693 goto out_no_action;
faf5f49c 4694 }
26e976a8 4695 calldata->timestamp = jiffies;
035168ab 4696 if (nfs4_setup_sequence(calldata->server,
a893693c 4697 &calldata->arg.seq_args,
2240a9e2
TM		 4698 &calldata->res.seq_res,
4699 task) != 0)
4700 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4701 return;
4702out_no_action:
4703 task->tk_action = NULL;
4704out_wait:
4705 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4706}
4707
963d8fe5 4708static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4709 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4710 .rpc_call_done = nfs4_locku_done,
06f814a3 4711 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4712};
4713
a5d16a4d
TM		 4714static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4715 struct nfs_open_context *ctx,
4716 struct nfs4_lock_state *lsp,
4717 struct nfs_seqid *seqid)
4718{
4719 struct nfs4_unlockdata *data;
5138fde0
TM		 4720 struct rpc_message msg = {
4721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4722 .rpc_cred = ctx->cred,
4723 };
c970aa85
TM		 4724 struct rpc_task_setup task_setup_data = {
4725 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4726 .rpc_message = &msg,
c970aa85 4727 .callback_ops = &nfs4_locku_ops,
101070ca 4728 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4729 .flags = RPC_TASK_ASYNC,
4730 };
a5d16a4d 4731
137d6aca
FF		 4732 /* Ensure this is an unlock - when canceling a lock, the
4733 * canceled lock is passed in, and it won't be an unlock.
4734 */
4735 fl->fl_type = F_UNLCK;
4736
a5d16a4d
TM		 4737 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4738 if (data == NULL) {
4739 nfs_free_seqid(seqid);
4740 return ERR_PTR(-ENOMEM);
4741 }
4742
9d12b216 4743 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4744 msg.rpc_argp = &data->arg;
4745 msg.rpc_resp = &data->res;
c970aa85
TM		 4746 task_setup_data.callback_data = data;
4747 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4748}
4749
faf5f49c
TM		 4750static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4751{
65b62a29
TM		 4752 struct inode *inode = state->inode;
4753 struct nfs4_state_owner *sp = state->owner;
4754 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4755 struct nfs_seqid *seqid;
1da177e4 4756 struct nfs4_lock_state *lsp;
06f814a3
TM		 4757 struct rpc_task *task;
4758 int status = 0;
536ff0f8 4759 unsigned char fl_flags = request->fl_flags;
faf5f49c 4760
8d0a8a9d 4761 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4762 /* Unlock _before_ we do the RPC call */
4763 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4764 /* Exclude nfs_delegation_claim_locks() */
4765 mutex_lock(&sp->so_delegreturn_mutex);
4766 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4767 down_read(&nfsi->rwsem);
4768 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4769 up_read(&nfsi->rwsem);
65b62a29 4770 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4771 goto out;
19e03c57
TM		 4772 }
4773 up_read(&nfsi->rwsem);
65b62a29 4774 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4775 if (status != 0)
9b073574
TM		 4776 goto out;
4777 /* Is this a delegated lock? */
8d0a8a9d 4778 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 4779 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
4780 goto out;
8535b2be 4781 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4782 status = -ENOMEM;
911d1aaf 4783 if (seqid == NULL)
9b073574 4784 goto out;
cd3758e3 4785 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4786 status = PTR_ERR(task);
4787 if (IS_ERR(task))
9b073574 4788 goto out;
a5d16a4d 4789 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4790 rpc_put_task(task);
9b073574 4791out:
536ff0f8 4792 request->fl_flags = fl_flags;
1da177e4
LT		 4793 return status;
4794}
4795
a5d16a4d
TM		 4796struct nfs4_lockdata {
4797 struct nfs_lock_args arg;
4798 struct nfs_lock_res res;
4799 struct nfs4_lock_state *lsp;
4800 struct nfs_open_context *ctx;
4801 struct file_lock fl;
26e976a8 4802 unsigned long timestamp;
a5d16a4d
TM		 4803 int rpc_status;
4804 int cancelled;
66179efe 4805 struct nfs_server *server;
a5d16a4d
TM		 4806};
4807
4808static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4809 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4810 gfp_t gfp_mask)
1da177e4 4811{
a5d16a4d
TM		 4812 struct nfs4_lockdata *p;
4813 struct inode *inode = lsp->ls_state->inode;
1da177e4 4814 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4815
8535b2be 4816 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4817 if (p == NULL)
4818 return NULL;
4819
4820 p->arg.fh = NFS_FH(inode);
4821 p->arg.fl = &p->fl;
8535b2be 4822 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4823 if (p->arg.open_seqid == NULL)
4824 goto out_free;
8535b2be 4825 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4826 if (p->arg.lock_seqid == NULL)
2f74c0a0 4827 goto out_free_seqid;
a5d16a4d 4828 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4829 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4830 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4831 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4832 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4833 p->lsp = lsp;
66179efe 4834 p->server = server;
a5d16a4d
TM		 4835 atomic_inc(&lsp->ls_count);
4836 p->ctx = get_nfs_open_context(ctx);
4837 memcpy(&p->fl, fl, sizeof(p->fl));
4838 return p;
2f74c0a0
TM		 4839out_free_seqid:
4840 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4841out_free:
4842 kfree(p);
4843 return NULL;
4844}
4845
4846static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4847{
4848 struct nfs4_lockdata *data = calldata;
4849 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4850
3110ff80 4851 dprintk("%s: begin!\n", __func__);
2f74c0a0 4852 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4853 goto out_wait;
a5d16a4d
TM		 4854 /* Do we need to do an open_to_lock_owner? */
4855 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4856 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4857 goto out_release_lock_seqid;
8fe72bac 4858 }
8e472f33 4859 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4860 data->arg.new_lock_owner = 1;
c1d51931 4861 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4862 } else
4863 data->arg.new_lock_owner = 0;
5d422301
TM		 4864 if (!nfs4_valid_open_stateid(state)) {
4865 data->rpc_status = -EBADF;
4866 task->tk_action = NULL;
4867 goto out_release_open_seqid;
4868 }
26e976a8 4869 data->timestamp = jiffies;
035168ab
TM		 4870 if (nfs4_setup_sequence(data->server,
4871 &data->arg.seq_args,
2240a9e2 4872 &data->res.seq_res,
d9afbd1b 4873 task) == 0)
66179efe 4874 return;
5d422301 4875out_release_open_seqid:
2240a9e2
TM		 4876 nfs_release_seqid(data->arg.open_seqid);
4877out_release_lock_seqid:
4878 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4879out_wait:
4880 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4881 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4882}
4883
a5d16a4d
TM		 4884static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4885{
4886 struct nfs4_lockdata *data = calldata;
4887
3110ff80 4888 dprintk("%s: begin!\n", __func__);
a5d16a4d 4889
14516c3a
TM		 4890 if (!nfs4_sequence_done(task, &data->res.seq_res))
4891 return;
66179efe 4892
a5d16a4d 4893 data->rpc_status = task->tk_status;
a5d16a4d 4894 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4895 if (data->rpc_status == 0)
4896 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4897 else
4898 goto out;
4899 }
4900 if (data->rpc_status == 0) {
f597c537 4901 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4902 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4903 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4904 }
a5d16a4d 4905out:
3110ff80 4906 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4907}
4908
4909static void nfs4_lock_release(void *calldata)
4910{
4911 struct nfs4_lockdata *data = calldata;
4912
3110ff80 4913 dprintk("%s: begin!\n", __func__);
2f74c0a0 4914 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4915 if (data->cancelled != 0) {
4916 struct rpc_task *task;
4917 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4918 data->arg.lock_seqid);
4919 if (!IS_ERR(task))
bf294b41 4920 rpc_put_task_async(task);
3110ff80 4921 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4922 } else
4923 nfs_free_seqid(data->arg.lock_seqid);
4924 nfs4_put_lock_state(data->lsp);
4925 put_nfs_open_context(data->ctx);
4926 kfree(data);
3110ff80 4927 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4928}
4929
4930static const struct rpc_call_ops nfs4_lock_ops = {
4931 .rpc_call_prepare = nfs4_lock_prepare,
4932 .rpc_call_done = nfs4_lock_done,
4933 .rpc_release = nfs4_lock_release,
4934};
4935
2bee72a6
TM		 4936static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4937{
2bee72a6
TM		 4938 switch (error) {
4939 case -NFS4ERR_ADMIN_REVOKED:
4940 case -NFS4ERR_BAD_STATEID:
ecac799a 4941 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4942 if (new_lock_owner != 0 ||
795a88c9 4943 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4944 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4945 break;
4946 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4947 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4948 case -NFS4ERR_EXPIRED:
4949 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4950 };
4951}
4952
afe6c27c 4953static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4954{
4955 struct nfs4_lockdata *data;
4956 struct rpc_task *task;
5138fde0
TM		 4957 struct rpc_message msg = {
4958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4959 .rpc_cred = state->owner->so_cred,
4960 };
c970aa85
TM		 4961 struct rpc_task_setup task_setup_data = {
4962 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4963 .rpc_message = &msg,
c970aa85 4964 .callback_ops = &nfs4_lock_ops,
101070ca 4965 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4966 .flags = RPC_TASK_ASYNC,
4967 };
a5d16a4d
TM		 4968 int ret;
4969
3110ff80 4970 dprintk("%s: begin!\n", __func__);
cd3758e3 4971 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4972 fl->fl_u.nfs4_fl.owner,
4973 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4974 if (data == NULL)
4975 return -ENOMEM;
4976 if (IS_SETLKW(cmd))
4977 data->arg.block = 1;
9d12b216 4978 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4979 msg.rpc_argp = &data->arg;
4980 msg.rpc_resp = &data->res;
c970aa85 4981 task_setup_data.callback_data = data;
8fe72bac
TM		 4982 if (recovery_type > NFS_LOCK_NEW) {
4983 if (recovery_type == NFS_LOCK_RECLAIM)
4984 data->arg.reclaim = NFS_LOCK_RECLAIM;
4985 nfs4_set_sequence_privileged(&data->arg.seq_args);
4986 }
c970aa85 4987 task = rpc_run_task(&task_setup_data);
7a1218a2 4988 if (IS_ERR(task))
a5d16a4d 4989 return PTR_ERR(task);
a5d16a4d
TM		 4990 ret = nfs4_wait_for_completion_rpc_task(task);
4991 if (ret == 0) {
4992 ret = data->rpc_status;
2bee72a6
TM		 4993 if (ret)
4994 nfs4_handle_setlk_error(data->server, data->lsp,
4995 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4996 } else
4997 data->cancelled = 1;
e6b3c4db 4998 rpc_put_task(task);
3110ff80 4999 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5000 return ret;
1da177e4
LT		 5001}
5002
5003static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5004{
202b50dc 5005 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5006 struct nfs4_exception exception = {
5007 .inode = state->inode,
5008 };
202b50dc
TM		 5009 int err;
5010
5011 do {
42a2d13e
TM		 5012 /* Cache the lock if possible... */
5013 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5014 return 0;
afe6c27c 5015 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5016 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5017 break;
5018 nfs4_handle_exception(server, err, &exception);
5019 } while (exception.retry);
5020 return err;
1da177e4
LT		 5021}
5022
5023static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5024{
202b50dc 5025 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5026 struct nfs4_exception exception = {
5027 .inode = state->inode,
5028 };
202b50dc
TM		 5029 int err;
5030
6bfc93ef
TM		 5031 err = nfs4_set_lock_state(state, request);
5032 if (err != 0)
5033 return err;
202b50dc 5034 do {
42a2d13e
TM		 5035 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5036 return 0;
afe6c27c 5037 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5038 switch (err) {
5039 default:
5040 goto out;
5041 case -NFS4ERR_GRACE:
5042 case -NFS4ERR_DELAY:
5043 nfs4_handle_exception(server, err, &exception);
5044 err = 0;
5045 }
202b50dc 5046 } while (exception.retry);
a9ed2e25 5047out:
202b50dc 5048 return err;
1da177e4
LT		 5049}
5050
f062eb6c 5051#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5052/**
5053 * nfs41_check_expired_locks - possibly free a lock stateid
5054 *
5055 * @state: NFSv4 state for an inode
5056 *
5057 * Returns NFS_OK if recovery for this stateid is now finished.
5058 * Otherwise a negative NFS4ERR value is returned.
5059 */
b01dd1d8 5060static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5061{
eb64cf96 5062 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5063 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5064 struct nfs_server *server = NFS_SERVER(state->inode);
5065
b01dd1d8 5066 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5067 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 5068 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5069 if (status != NFS_OK) {
3e60ffdd
CL		 5070 /* Free the stateid unless the server
5071 * informs us the stateid is unrecognized. */
89af2739
CL		 5072 if (status != -NFS4ERR_BAD_STATEID)
5073 nfs41_free_stateid(server,
5074 &lsp->ls_stateid);
795a88c9 5075 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5076 ret = status;
5077 }
5078 }
5079 };
5080
5081 return ret;
5082}
5083
5084static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5085{
5086 int status = NFS_OK;
5087
5088 if (test_bit(LK_STATE_IN_USE, &state->flags))
5089 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5090 if (status != NFS_OK)
5091 status = nfs4_lock_expired(state, request);
5092 return status;
f062eb6c
BS		 5093}
5094#endif
5095
1da177e4
LT		 5096static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5097{
9a99af49 5098 struct nfs4_state_owner *sp = state->owner;
19e03c57 5099 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5100 unsigned char fl_flags = request->fl_flags;
9a99af49 5101 unsigned int seq;
8e469ebd 5102 int status = -ENOLCK;
1da177e4 5103
8e469ebd
TM		 5104 if ((fl_flags & FL_POSIX) &&
5105 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5106 goto out;
6bfc93ef 5107 /* Is this a delegated open? */
6bfc93ef
TM		 5108 status = nfs4_set_lock_state(state, request);
5109 if (status != 0)
5110 goto out;
01c3b861
TM		 5111 request->fl_flags |= FL_ACCESS;
5112 status = do_vfs_lock(request->fl_file, request);
5113 if (status < 0)
5114 goto out;
19e03c57 5115 down_read(&nfsi->rwsem);
01c3b861 5116 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5117 /* Yes: cache locks! */
01c3b861 5118 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5119 request->fl_flags = fl_flags & ~FL_SLEEP;
5120 status = do_vfs_lock(request->fl_file, request);
5121 goto out_unlock;
01c3b861 5122 }
9a99af49
TM		 5123 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5124 up_read(&nfsi->rwsem);
afe6c27c 5125 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5126 if (status != 0)
9a99af49
TM		 5127 goto out;
5128 down_read(&nfsi->rwsem);
5129 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5130 status = -NFS4ERR_DELAY;
01c3b861 5131 goto out_unlock;
9a99af49 5132 }
6bfc93ef 5133 /* Note: we always want to sleep here! */
01c3b861 5134 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5135 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5136 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5137 "manager!\n", __func__);
01c3b861 5138out_unlock:
19e03c57 5139 up_read(&nfsi->rwsem);
01c3b861
TM		 5140out:
5141 request->fl_flags = fl_flags;
1da177e4
LT		 5142 return status;
5143}
5144
5145static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5146{
a1d0b5ee
TM		 5147 struct nfs4_exception exception = {
5148 .state = state,
05ffe24f 5149 .inode = state->inode,
a1d0b5ee 5150 };
1da177e4
LT		 5151 int err;
5152
5153 do {
965b5d67
TM		 5154 err = _nfs4_proc_setlk(state, cmd, request);
5155 if (err == -NFS4ERR_DENIED)
5156 err = -EAGAIN;
1da177e4 5157 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5158 err, &exception);
1da177e4
LT		 5159 } while (exception.retry);
5160 return err;
5161}
5162
5163static int
5164nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5165{
5166 struct nfs_open_context *ctx;
5167 struct nfs4_state *state;
5168 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5169 int status;
5170
5171 /* verify open state */
cd3758e3 5172 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5173 state = ctx->state;
5174
5175 if (request->fl_start < 0 || request->fl_end < 0)
5176 return -EINVAL;
5177
d953126a
TM		 5178 if (IS_GETLK(cmd)) {
5179 if (state != NULL)
5180 return nfs4_proc_getlk(state, F_GETLK, request);
5181 return 0;
5182 }
1da177e4
LT		 5183
5184 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5185 return -EINVAL;
5186
d953126a
TM		 5187 if (request->fl_type == F_UNLCK) {
5188 if (state != NULL)
5189 return nfs4_proc_unlck(state, cmd, request);
5190 return 0;
5191 }
1da177e4 5192
d953126a
TM		 5193 if (state == NULL)
5194 return -ENOLCK;
55725513
TM		 5195 /*
5196 * Don't rely on the VFS having checked the file open mode,
5197 * since it won't do this for flock() locks.
5198 */
f44106e2 5199 switch (request->fl_type) {
55725513
TM		 5200 case F_RDLCK:
5201 if (!(filp->f_mode & FMODE_READ))
5202 return -EBADF;
5203 break;
5204 case F_WRLCK:
5205 if (!(filp->f_mode & FMODE_WRITE))
5206 return -EBADF;
5207 }
5208
1da177e4
LT		 5209 do {
5210 status = nfs4_proc_setlk(state, cmd, request);
5211 if ((status != -EAGAIN) || IS_SETLK(cmd))
5212 break;
5213 timeout = nfs4_set_lock_task_retry(timeout);
5214 status = -ERESTARTSYS;
5215 if (signalled())
5216 break;
5217 } while(status < 0);
1da177e4
LT		 5218 return status;
5219}
5220
db4f2e63 5221int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5222{
5223 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5224 int err;
5225
5226 err = nfs4_set_lock_state(state, fl);
5227 if (err != 0)
db4f2e63 5228 return err;
4a706fa0 5229 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5230 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5231}
6b3b5496 5232
cf470c3e
TM		 5233struct nfs_release_lockowner_data {
5234 struct nfs4_lock_state *lsp;
5ae67c4f 5235 struct nfs_server *server;
cf470c3e
TM		 5236 struct nfs_release_lockowner_args args;
5237};
5238
d3c7b7cc
TM		 5239static void nfs4_release_lockowner_release(void *calldata)
5240{
cf470c3e 5241 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5242 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5243 kfree(calldata);
5244}
5245
17280175 5246static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5247 .rpc_release = nfs4_release_lockowner_release,
5248};
5249
c8b2d0bf 5250static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5251{
cf470c3e 5252 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5253 struct rpc_message msg = {
5254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5255 };
5256
5257 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5258 return -EINVAL;
5259 data = kmalloc(sizeof(*data), GFP_NOFS);
5260 if (!data)
5261 return -ENOMEM;
5262 data->lsp = lsp;
5ae67c4f 5263 data->server = server;
cf470c3e
TM		 5264 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5265 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5266 data->args.lock_owner.s_dev = server->s_dev;
5267 msg.rpc_argp = &data->args;
5268 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5269 return 0;
d3c7b7cc
TM		 5270}
5271
aa1870af
BF		 5272#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5273
64c2ce8b
AK		 5274static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5275 const void *buf, size_t buflen,
5276 int flags, int type)
6b3b5496 5277{
64c2ce8b
AK		 5278 if (strcmp(key, "") != 0)
5279 return -EINVAL;
4b580ee3 5280
64c2ce8b 5281 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5282}
5283
64c2ce8b
AK		 5284static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5285 void *buf, size_t buflen, int type)
6b3b5496 5286{
64c2ce8b
AK		 5287 if (strcmp(key, "") != 0)
5288 return -EINVAL;
aa1870af 5289
64c2ce8b 5290 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5291}
5292
64c2ce8b
AK		 5293static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5294 size_t list_len, const char *name,
5295 size_t name_len, int type)
6b3b5496 5296{
64c2ce8b 5297 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5298
096455a2
BF		 5299 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5300 return 0;
64c2ce8b
AK		 5301
5302 if (list && len <= list_len)
5303 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5304 return len;
6b3b5496
BF		 5305}
5306
533eb461
AA		 5307/*
5308 * nfs_fhget will use either the mounted_on_fileid or the fileid
5309 */
69aaaae1
TM		 5310static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5311{
533eb461
AA		 5312 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5313 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5314 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5315 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5316 return;
5317
5318 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5319 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5320 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5321 fattr->nlink = 2;
5322}
5323
f05d147f
BS		 5324static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5325 const struct qstr *name,
5326 struct nfs4_fs_locations *fs_locations,
5327 struct page *page)
683b57b4
TM		 5328{
5329 struct nfs_server *server = NFS_SERVER(dir);
5330 u32 bitmask[2] = {
361e624f 5331 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5332 };
5333 struct nfs4_fs_locations_arg args = {
5334 .dir_fh = NFS_FH(dir),
c228fd3a 5335 .name = name,
683b57b4
TM		 5336 .page = page,
5337 .bitmask = bitmask,
5338 };
22958463
BH		 5339 struct nfs4_fs_locations_res res = {
5340 .fs_locations = fs_locations,
5341 };
683b57b4
TM		 5342 struct rpc_message msg = {
5343 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5344 .rpc_argp = &args,
22958463 5345 .rpc_resp = &res,
683b57b4
TM		 5346 };
5347 int status;
5348
3110ff80 5349 dprintk("%s: start\n", __func__);
533eb461
AA		 5350
5351 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5352 * is not supported */
5353 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5354 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5355 else
5356 bitmask[0] |= FATTR4_WORD0_FILEID;
5357
c228fd3a 5358 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5359 fs_locations->server = server;
830b8e33 5360 fs_locations->nlocations = 0;
f05d147f 5361 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5362 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5363 return status;
5364}
5365
f05d147f
BS		 5366int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5367 const struct qstr *name,
5368 struct nfs4_fs_locations *fs_locations,
5369 struct page *page)
db0a9593
BS		 5370{
5371 struct nfs4_exception exception = { };
5372 int err;
5373 do {
5374 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5375 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5376 &exception);
5377 } while (exception.retry);
5378 return err;
5379}
5380
5a5ea0d4
BS		 5381static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5382{
5383 int status;
5384 struct nfs4_secinfo_arg args = {
5385 .dir_fh = NFS_FH(dir),
5386 .name = name,
5387 };
5388 struct nfs4_secinfo_res res = {
5389 .flavors = flavors,
5390 };
5391 struct rpc_message msg = {
5392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5393 .rpc_argp = &args,
5394 .rpc_resp = &res,
5395 };
5396
5397 dprintk("NFS call secinfo %s\n", name->name);
5398 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5399 dprintk("NFS reply secinfo: %d\n", status);
5400 return status;
5401}
5402
72de53ec
BS		 5403int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5404 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5405{
5406 struct nfs4_exception exception = { };
5407 int err;
5408 do {
5409 err = nfs4_handle_exception(NFS_SERVER(dir),
5410 _nfs4_proc_secinfo(dir, name, flavors),
5411 &exception);
5412 } while (exception.retry);
5413 return err;
5414}
5415
557134a3 5416#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5417/*
5418 * Check the exchange flags returned by the server for invalid flags, having
5419 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5420 * DS flags set.
5421 */
5422static int nfs4_check_cl_exchange_flags(u32 flags)
5423{
5424 if (flags & ~EXCHGID4_FLAG_MASK_R)
5425 goto out_inval;
5426 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5427 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5428 goto out_inval;
5429 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5430 goto out_inval;
5431 return NFS_OK;
5432out_inval:
5433 return -NFS4ERR_INVAL;
5434}
5435
78fe0f41 5436static bool
79d4e1f0
CL		 5437nfs41_same_server_scope(struct nfs41_server_scope *a,
5438 struct nfs41_server_scope *b)
78fe0f41
WAA		 5439{
5440 if (a->server_scope_sz == b->server_scope_sz &&
5441 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5442 return true;
5443
5444 return false;
5445}
5446
7c44f1ae
WAA		 5447/*
5448 * nfs4_proc_bind_conn_to_session()
5449 *
5450 * The 4.1 client currently uses the same TCP connection for the
5451 * fore and backchannel.
5452 */
2cf047c9 5453int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5454{
5455 int status;
5456 struct nfs41_bind_conn_to_session_res res;
5457 struct rpc_message msg = {
5458 .rpc_proc =
5459 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5460 .rpc_argp = clp,
5461 .rpc_resp = &res,
2cf047c9 5462 .rpc_cred = cred,
7c44f1ae
WAA		 5463 };
5464
5465 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5466
5467 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5468 if (unlikely(res.session == NULL)) {
5469 status = -ENOMEM;
5470 goto out;
5471 }
5472
5473 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5474 if (status == 0) {
5475 if (memcmp(res.session->sess_id.data,
5476 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5477 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5478 status = -EIO;
5479 goto out_session;
5480 }
5481 if (res.dir != NFS4_CDFS4_BOTH) {
5482 dprintk("NFS: %s: Unexpected direction from server\n",
5483 __func__);
5484 status = -EIO;
5485 goto out_session;
5486 }
5487 if (res.use_conn_in_rdma_mode) {
5488 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5489 __func__);
5490 status = -EIO;
5491 goto out_session;
5492 }
5493 }
5494out_session:
5495 kfree(res.session);
5496out:
5497 dprintk("<-- %s status= %d\n", __func__, status);
5498 return status;
5499}
5500
99fe60d0
BH		 5501/*
5502 * nfs4_proc_exchange_id()
5503 *
6bbb4ae8
CL		 5504 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5505 *
99fe60d0
BH		 5506 * Since the clientid has expired, all compounds using sessions
5507 * associated with the stale clientid will be returning
5508 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5509 * be in some phase of session reset.
5510 */
4d643d1d 5511int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5512{
5513 nfs4_verifier verifier;
5514 struct nfs41_exchange_id_args args = {
cd93710e 5515 .verifier = &verifier,
99fe60d0 5516 .client = clp,
357f54d6 5517 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5518 };
5519 struct nfs41_exchange_id_res res = {
32b01310 5520 0
99fe60d0
BH		 5521 };
5522 int status;
5523 struct rpc_message msg = {
5524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5525 .rpc_argp = &args,
5526 .rpc_resp = &res,
5527 .rpc_cred = cred,
5528 };
99fe60d0 5529
f092075d 5530 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5531 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5532 sizeof(args.id));
6bbb4ae8
CL		 5533 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5534 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5535 args.id_len, args.id);
99fe60d0 5536
acdeb69d 5537 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5538 GFP_NOFS);
acdeb69d 5539 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5540 status = -ENOMEM;
5541 goto out;
5542 }
78fe0f41 5543
79d4e1f0 5544 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5545 GFP_NOFS);
177313f1 5546 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5547 status = -ENOMEM;
acdeb69d 5548 goto out_server_owner;
abe9a6d5 5549 }
78fe0f41 5550
bbafffd2 5551 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5552 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5553 status = -ENOMEM;
5554 goto out_server_scope;
5555 }
5556
1bd714f2 5557 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5558 if (status == 0)
32b01310 5559 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5560
acdeb69d 5561 if (status == 0) {
32b01310
TM		 5562 clp->cl_clientid = res.clientid;
5563 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5564 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5565 clp->cl_seqid = res.seqid;
5566
acdeb69d
CL		 5567 kfree(clp->cl_serverowner);
5568 clp->cl_serverowner = res.server_owner;
5569 res.server_owner = NULL;
78fe0f41 5570
7d2ed9ac 5571 /* use the most recent implementation id */
59155546
CL		 5572 kfree(clp->cl_implid);
5573 clp->cl_implid = res.impl_id;
7d2ed9ac 5574
177313f1 5575 if (clp->cl_serverscope != NULL &&
79d4e1f0 5576 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5577 res.server_scope)) {
5578 dprintk("%s: server_scope mismatch detected\n",
5579 __func__);
5580 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5581 kfree(clp->cl_serverscope);
5582 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5583 }
5584
177313f1 5585 if (clp->cl_serverscope == NULL) {
79d4e1f0 5586 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5587 goto out;
5588 }
32b01310
TM		 5589 } else
5590 kfree(res.impl_id);
7d2ed9ac 5591
acdeb69d
CL		 5592out_server_owner:
5593 kfree(res.server_owner);
7d2ed9ac 5594out_server_scope:
abe9a6d5
WAA		 5595 kfree(res.server_scope);
5596out:
177313f1 5597 if (clp->cl_implid != NULL)
6bbb4ae8 5598 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5599 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5600 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5601 clp->cl_implid->date.seconds,
5602 clp->cl_implid->date.nseconds);
6bbb4ae8 5603 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5604 return status;
5605}
5606
66245539
TM		 5607static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5608 struct rpc_cred *cred)
5609{
5610 struct rpc_message msg = {
5611 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5612 .rpc_argp = clp,
5613 .rpc_cred = cred,
5614 };
5615 int status;
5616
5617 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5618 if (status)
02c67525 5619 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5620 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5621 return status;
5622}
5623
5624static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5625 struct rpc_cred *cred)
5626{
5627 unsigned int loop;
5628 int ret;
5629
5630 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5631 ret = _nfs4_proc_destroy_clientid(clp, cred);
5632 switch (ret) {
5633 case -NFS4ERR_DELAY:
5634 case -NFS4ERR_CLIENTID_BUSY:
5635 ssleep(1);
5636 break;
5637 default:
5638 return ret;
5639 }
5640 }
5641 return 0;
5642}
5643
5644int nfs4_destroy_clientid(struct nfs_client *clp)
5645{
5646 struct rpc_cred *cred;
5647 int ret = 0;
5648
5649 if (clp->cl_mvops->minor_version < 1)
5650 goto out;
5651 if (clp->cl_exchange_flags == 0)
5652 goto out;
05f4c350
CL		 5653 if (clp->cl_preserve_clid)
5654 goto out;
66245539
TM		 5655 cred = nfs4_get_exchange_id_cred(clp);
5656 ret = nfs4_proc_destroy_clientid(clp, cred);
5657 if (cred)
5658 put_rpccred(cred);
5659 switch (ret) {
5660 case 0:
5661 case -NFS4ERR_STALE_CLIENTID:
5662 clp->cl_exchange_flags = 0;
5663 }
5664out:
5665 return ret;
5666}
5667
2050f0cc
AA		 5668struct nfs4_get_lease_time_data {
5669 struct nfs4_get_lease_time_args *args;
5670 struct nfs4_get_lease_time_res *res;
5671 struct nfs_client *clp;
5672};
5673
5674static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5675 void *calldata)
5676{
2050f0cc
AA		 5677 struct nfs4_get_lease_time_data *data =
5678 (struct nfs4_get_lease_time_data *)calldata;
5679
5680 dprintk("--> %s\n", __func__);
5681 /* just setup sequence, do not trigger session recovery
5682 since we're invoked within one */
d9afbd1b
TM		 5683 nfs41_setup_sequence(data->clp->cl_session,
5684 &data->args->la_seq_args,
5685 &data->res->lr_seq_res,
5686 task);
2050f0cc
AA		 5687 dprintk("<-- %s\n", __func__);
5688}
5689
5690/*
5691 * Called from nfs4_state_manager thread for session setup, so don't recover
5692 * from sequence operation or clientid errors.
5693 */
5694static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5695{
5696 struct nfs4_get_lease_time_data *data =
5697 (struct nfs4_get_lease_time_data *)calldata;
5698
5699 dprintk("--> %s\n", __func__);
14516c3a
TM		 5700 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5701 return;
2050f0cc
AA		 5702 switch (task->tk_status) {
5703 case -NFS4ERR_DELAY:
5704 case -NFS4ERR_GRACE:
5705 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5706 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5707 task->tk_status = 0;
a8a4ae3a
AA		 5708 /* fall through */
5709 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5710 rpc_restart_call_prepare(task);
2050f0cc
AA		 5711 return;
5712 }
2050f0cc
AA		 5713 dprintk("<-- %s\n", __func__);
5714}
5715
17280175 5716static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5717 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5718 .rpc_call_done = nfs4_get_lease_time_done,
5719};
5720
5721int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5722{
5723 struct rpc_task *task;
5724 struct nfs4_get_lease_time_args args;
5725 struct nfs4_get_lease_time_res res = {
5726 .lr_fsinfo = fsinfo,
5727 };
5728 struct nfs4_get_lease_time_data data = {
5729 .args = &args,
5730 .res = &res,
5731 .clp = clp,
5732 };
5733 struct rpc_message msg = {
5734 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5735 .rpc_argp = &args,
5736 .rpc_resp = &res,
5737 };
5738 struct rpc_task_setup task_setup = {
5739 .rpc_client = clp->cl_rpcclient,
5740 .rpc_message = &msg,
5741 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5742 .callback_data = &data,
5743 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5744 };
5745 int status;
5746
9d12b216 5747 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5748 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5749 dprintk("--> %s\n", __func__);
5750 task = rpc_run_task(&task_setup);
5751
5752 if (IS_ERR(task))
5753 status = PTR_ERR(task);
5754 else {
5755 status = task->tk_status;
5756 rpc_put_task(task);
5757 }
5758 dprintk("<-- %s return %d\n", __func__, status);
5759
5760 return status;
5761}
5762
fc931582
AA		 5763/*
5764 * Initialize the values to be used by the client in CREATE_SESSION
5765 * If nfs4_init_session set the fore channel request and response sizes,
5766 * use them.
5767 *
5768 * Set the back channel max_resp_sz_cached to zero to force the client to
5769 * always set csa_cachethis to FALSE because the current implementation
5770 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5771 */
5772static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5773{
5774 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5775 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5776 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5777
5778 if (mxrqst_sz == 0)
5779 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5780 if (mxresp_sz == 0)
5781 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5782 /* Fore channel attributes */
fc931582
AA		 5783 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5784 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5785 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5786 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5787
5788 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5789 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5790 __func__,
5791 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5792 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5793
5794 /* Back channel attributes */
fc931582
AA		 5795 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5796 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5797 args->bc_attrs.max_resp_sz_cached = 0;
5798 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5799 args->bc_attrs.max_reqs = 1;
5800
5801 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5802 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5803 __func__,
5804 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5805 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5806 args->bc_attrs.max_reqs);
5807}
5808
43c2e885 5809static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5810{
43c2e885
BF		 5811 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5812 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5813
43c2e885
BF		 5814 if (rcvd->max_resp_sz > sent->max_resp_sz)
5815 return -EINVAL;
5816 /*
5817 * Our requested max_ops is the minimum we need; we're not
5818 * prepared to break up compounds into smaller pieces than that.
5819 * So, no point even trying to continue if the server won't
5820 * cooperate:
5821 */
5822 if (rcvd->max_ops < sent->max_ops)
5823 return -EINVAL;
5824 if (rcvd->max_reqs == 0)
5825 return -EINVAL;
b4b9a0c1
VG		 5826 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5827 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5828 return 0;
8d35301d
AA		 5829}
5830
43c2e885
BF		 5831static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5832{
5833 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5834 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5835
43c2e885
BF		 5836 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5837 return -EINVAL;
5838 if (rcvd->max_resp_sz < sent->max_resp_sz)
5839 return -EINVAL;
5840 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5841 return -EINVAL;
5842 /* These would render the backchannel useless: */
b4b9a0c1 5843 if (rcvd->max_ops != sent->max_ops)
43c2e885 5844 return -EINVAL;
b4b9a0c1 5845 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5846 return -EINVAL;
5847 return 0;
5848}
8d35301d 5849
8d35301d
AA		 5850static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5851 struct nfs4_session *session)
5852{
43c2e885 5853 int ret;
8d35301d 5854
43c2e885
BF		 5855 ret = nfs4_verify_fore_channel_attrs(args, session);
5856 if (ret)
5857 return ret;
5858 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5859}
5860
848f5bda
TM		 5861static int _nfs4_proc_create_session(struct nfs_client *clp,
5862 struct rpc_cred *cred)
fc931582
AA		 5863{
5864 struct nfs4_session *session = clp->cl_session;
5865 struct nfs41_create_session_args args = {
5866 .client = clp,
5867 .cb_program = NFS4_CALLBACK,
5868 };
5869 struct nfs41_create_session_res res = {
5870 .client = clp,
5871 };
5872 struct rpc_message msg = {
5873 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5874 .rpc_argp = &args,
5875 .rpc_resp = &res,
848f5bda 5876 .rpc_cred = cred,
fc931582
AA		 5877 };
5878 int status;
5879
5880 nfs4_init_channel_attrs(&args);
0f91421e 5881 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5882
1bd714f2 5883 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5884
43095d39 5885 if (!status) {
8d35301d
AA		 5886 /* Verify the session's negotiated channel_attrs values */
5887 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5888 /* Increment the clientid slot sequence id */
5889 clp->cl_seqid++;
5890 }
5891
5892 return status;
5893}
5894
5895/*
5896 * Issues a CREATE_SESSION operation to the server.
5897 * It is the responsibility of the caller to verify the session is
5898 * expired before calling this routine.
5899 */
848f5bda 5900int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5901{
5902 int status;
5903 unsigned *ptr;
fc931582
AA		 5904 struct nfs4_session *session = clp->cl_session;
5905
5906 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5907
848f5bda 5908 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5909 if (status)
5910 goto out;
5911
aacd5537
AA		 5912 /* Init or reset the session slot tables */
5913 status = nfs4_setup_session_slot_tables(session);
5914 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5915 if (status)
5916 goto out;
5917
5918 ptr = (unsigned *)&session->sess_id.data[0];
5919 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5920 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5921out:
5922 dprintk("<-- %s\n", __func__);
5923 return status;
5924}
5925
0f3e66c6
AA		 5926/*
5927 * Issue the over-the-wire RPC DESTROY_SESSION.
5928 * The caller must serialize access to this routine.
5929 */
848f5bda
TM		 5930int nfs4_proc_destroy_session(struct nfs4_session *session,
5931 struct rpc_cred *cred)
0f3e66c6 5932{
848f5bda
TM		 5933 struct rpc_message msg = {
5934 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5935 .rpc_argp = session,
5936 .rpc_cred = cred,
5937 };
0f3e66c6 5938 int status = 0;
0f3e66c6
AA		 5939
5940 dprintk("--> nfs4_proc_destroy_session\n");
5941
5942 /* session is still being setup */
5943 if (session->clp->cl_cons_state != NFS_CS_READY)
5944 return status;
5945
1bd714f2 5946 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5947
5948 if (status)
08106ac7 5949 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5950 "Session has been destroyed regardless...\n", status);
5951
5952 dprintk("<-- nfs4_proc_destroy_session\n");
5953 return status;
5954}
5955
fc01cea9
AA		 5956/*
5957 * Renew the cl_session lease.
5958 */
d5f8d3fe
TM		 5959struct nfs4_sequence_data {
5960 struct nfs_client *clp;
5961 struct nfs4_sequence_args args;
5962 struct nfs4_sequence_res res;
5963};
5964
dc96aef9
AB		 5965static void nfs41_sequence_release(void *data)
5966{
d5f8d3fe
TM		 5967 struct nfs4_sequence_data *calldata = data;
5968 struct nfs_client *clp = calldata->clp;
dc96aef9 5969
7135840f
AB		 5970 if (atomic_read(&clp->cl_count) > 1)
5971 nfs4_schedule_state_renewal(clp);
5972 nfs_put_client(clp);
d5f8d3fe 5973 kfree(calldata);
dc96aef9
AB		 5974}
5975
aa5190d0
TM		 5976static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5977{
5978 switch(task->tk_status) {
5979 case -NFS4ERR_DELAY:
aa5190d0
TM		 5980 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5981 return -EAGAIN;
5982 default:
0400a6b0 5983 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5984 }
5985 return 0;
5986}
5987
dc96aef9 5988static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5989{
d5f8d3fe
TM		 5990 struct nfs4_sequence_data *calldata = data;
5991 struct nfs_client *clp = calldata->clp;
fc01cea9 5992
14516c3a
TM		 5993 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5994 return;
fc01cea9
AA		 5995
5996 if (task->tk_status < 0) {
5997 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5998 if (atomic_read(&clp->cl_count) == 1)
5999 goto out;
fc01cea9 6000
aa5190d0
TM		 6001 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6002 rpc_restart_call_prepare(task);
fc01cea9
AA		 6003 return;
6004 }
6005 }
fc01cea9 6006 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6007out:
fc01cea9
AA		 6008 dprintk("<-- %s\n", __func__);
6009}
6010
6011static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6012{
d5f8d3fe
TM		 6013 struct nfs4_sequence_data *calldata = data;
6014 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6015 struct nfs4_sequence_args *args;
6016 struct nfs4_sequence_res *res;
6017
fc01cea9
AA		 6018 args = task->tk_msg.rpc_argp;
6019 res = task->tk_msg.rpc_resp;
6020
d9afbd1b 6021 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6022}
6023
6024static const struct rpc_call_ops nfs41_sequence_ops = {
6025 .rpc_call_done = nfs41_sequence_call_done,
6026 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6027 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6028};
6029
8fe72bac
TM		 6030static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6031 struct rpc_cred *cred,
6032 bool is_privileged)
fc01cea9 6033{
d5f8d3fe 6034 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6035 struct rpc_message msg = {
6036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6037 .rpc_cred = cred,
6038 };
71ac6da9
TM		 6039 struct rpc_task_setup task_setup_data = {
6040 .rpc_client = clp->cl_rpcclient,
6041 .rpc_message = &msg,
8fe72bac 6042 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6043 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6044 };
fc01cea9 6045
7135840f 6046 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6047 return ERR_PTR(-EIO);
dfb4f309 6048 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6049 if (calldata == NULL) {
7135840f 6050 nfs_put_client(clp);
71ac6da9 6051 return ERR_PTR(-ENOMEM);
fc01cea9 6052 }
9d12b216 6053 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6054 if (is_privileged)
6055 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6056 msg.rpc_argp = &calldata->args;
6057 msg.rpc_resp = &calldata->res;
6058 calldata->clp = clp;
71ac6da9 6059 task_setup_data.callback_data = calldata;
fc01cea9 6060
71ac6da9
TM		 6061 return rpc_run_task(&task_setup_data);
6062}
6063
2f60ea6b 6064static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6065{
6066 struct rpc_task *task;
6067 int ret = 0;
6068
2f60ea6b
TM		 6069 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6070 return 0;
8fe72bac 6071 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6072 if (IS_ERR(task))
6073 ret = PTR_ERR(task);
6074 else
bf294b41 6075 rpc_put_task_async(task);
71ac6da9
TM		 6076 dprintk("<-- %s status=%d\n", __func__, ret);
6077 return ret;
6078}
6079
6080static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6081{
6082 struct rpc_task *task;
6083 int ret;
6084
8fe72bac 6085 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6086 if (IS_ERR(task)) {
6087 ret = PTR_ERR(task);
6088 goto out;
6089 }
6090 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6091 if (!ret) {
6092 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6093
6094 if (task->tk_status == 0)
6095 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6096 ret = task->tk_status;
b4410c2f 6097 }
71ac6da9
TM		 6098 rpc_put_task(task);
6099out:
6100 dprintk("<-- %s status=%d\n", __func__, ret);
6101 return ret;
fc01cea9
AA		 6102}
6103
fce5c838
RL		 6104struct nfs4_reclaim_complete_data {
6105 struct nfs_client *clp;
6106 struct nfs41_reclaim_complete_args arg;
6107 struct nfs41_reclaim_complete_res res;
6108};
6109
6110static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6111{
6112 struct nfs4_reclaim_complete_data *calldata = data;
6113
d9afbd1b
TM		 6114 nfs41_setup_sequence(calldata->clp->cl_session,
6115 &calldata->arg.seq_args,
6116 &calldata->res.seq_res,
6117 task);
fce5c838
RL		 6118}
6119
aa5190d0
TM		 6120static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6121{
6122 switch(task->tk_status) {
6123 case 0:
6124 case -NFS4ERR_COMPLETE_ALREADY:
6125 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6126 break;
6127 case -NFS4ERR_DELAY:
aa5190d0 6128 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6129 /* fall through */
6130 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6131 return -EAGAIN;
6132 default:
0400a6b0 6133 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6134 }
6135 return 0;
6136}
6137
fce5c838
RL		 6138static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6139{
6140 struct nfs4_reclaim_complete_data *calldata = data;
6141 struct nfs_client *clp = calldata->clp;
6142 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6143
6144 dprintk("--> %s\n", __func__);
14516c3a
TM		 6145 if (!nfs41_sequence_done(task, res))
6146 return;
fce5c838 6147
aa5190d0
TM		 6148 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6149 rpc_restart_call_prepare(task);
6150 return;
6151 }
fce5c838
RL		 6152 dprintk("<-- %s\n", __func__);
6153}
6154
6155static void nfs4_free_reclaim_complete_data(void *data)
6156{
6157 struct nfs4_reclaim_complete_data *calldata = data;
6158
6159 kfree(calldata);
6160}
6161
6162static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6163 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6164 .rpc_call_done = nfs4_reclaim_complete_done,
6165 .rpc_release = nfs4_free_reclaim_complete_data,
6166};
6167
6168/*
6169 * Issue a global reclaim complete.
6170 */
6171static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6172{
6173 struct nfs4_reclaim_complete_data *calldata;
6174 struct rpc_task *task;
6175 struct rpc_message msg = {
6176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6177 };
6178 struct rpc_task_setup task_setup_data = {
6179 .rpc_client = clp->cl_rpcclient,
6180 .rpc_message = &msg,
6181 .callback_ops = &nfs4_reclaim_complete_call_ops,
6182 .flags = RPC_TASK_ASYNC,
6183 };
6184 int status = -ENOMEM;
6185
6186 dprintk("--> %s\n", __func__);
8535b2be 6187 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6188 if (calldata == NULL)
6189 goto out;
6190 calldata->clp = clp;
6191 calldata->arg.one_fs = 0;
fce5c838 6192
9d12b216 6193 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6194 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6195 msg.rpc_argp = &calldata->arg;
6196 msg.rpc_resp = &calldata->res;
6197 task_setup_data.callback_data = calldata;
6198 task = rpc_run_task(&task_setup_data);
acf82b85 6199 if (IS_ERR(task)) {
fce5c838 6200 status = PTR_ERR(task);
acf82b85
DC		 6201 goto out;
6202 }
c34c32ea
AA		 6203 status = nfs4_wait_for_completion_rpc_task(task);
6204 if (status == 0)
6205 status = task->tk_status;
fce5c838 6206 rpc_put_task(task);
acf82b85 6207 return 0;
fce5c838
RL		 6208out:
6209 dprintk("<-- %s status=%d\n", __func__, status);
6210 return status;
6211}
b1f69b75
AA		 6212
6213static void
6214nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6215{
6216 struct nfs4_layoutget *lgp = calldata;
c31663d4 6217 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6218 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6219
6220 dprintk("--> %s\n", __func__);
c31663d4
FI		 6221 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6222 * right now covering the LAYOUTGET we are about to send.
6223 * However, that is not so catastrophic, and there seems
6224 * to be no way to prevent it completely.
6225 */
6ba7db34 6226 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6227 &lgp->res.seq_res, task))
b1f69b75 6228 return;
cf7d63f1
FI		 6229 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6230 NFS_I(lgp->args.inode)->layout,
6231 lgp->args.ctx->state)) {
6232 rpc_exit(task, NFS4_OK);
cf7d63f1 6233 }
b1f69b75
AA		 6234}
6235
6236static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6237{
6238 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6239 struct inode *inode = lgp->args.inode;
6240 struct nfs_server *server = NFS_SERVER(inode);
6241 struct pnfs_layout_hdr *lo;
6242 struct nfs4_state *state = NULL;
305a7c62 6243 unsigned long timeo, now, giveup;
b1f69b75 6244
305a7c62 6245 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 6246
6ba7db34 6247 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6248 goto out;
b1f69b75
AA		 6249
6250 switch (task->tk_status) {
6251 case 0:
ee314c2a 6252 goto out;
305a7c62
BH		 6253 /*
6254 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
6255 * (or clients) writing to the same RAID stripe
6256 */
b1f69b75 6257 case -NFS4ERR_LAYOUTTRYLATER:
305a7c62
BH		 6258 /*
6259 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
6260 * existing layout before getting a new one).
6261 */
b1f69b75 6262 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6263 timeo = rpc_get_timeout(task->tk_client);
6264 giveup = lgp->args.timestamp + timeo;
305a7c62
BH		 6265 now = jiffies;
6266 if (time_after(giveup, now)) {
6267 unsigned long delay;
6268
6269 /* Delay for:
6270 * - Not less then NFS4_POLL_RETRY_MIN.
6271 * - One last time a jiffie before we give up
6272 * - exponential backoff (time_now minus start_attempt)
6273 */
6274 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
6275 min((giveup - now - 1),
6276 now - lgp->args.timestamp));
6277
6278 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
6279 __func__, delay);
6280 rpc_delay(task, delay);
6281 task->tk_status = 0;
6282 rpc_restart_call_prepare(task);
6283 goto out; /* Do not call nfs4_async_handle_error() */
6284 }
ee314c2a
TM		 6285 break;
6286 case -NFS4ERR_EXPIRED:
6287 case -NFS4ERR_BAD_STATEID:
6288 spin_lock(&inode->i_lock);
6289 lo = NFS_I(inode)->layout;
6290 if (!lo || list_empty(&lo->plh_segs)) {
6291 spin_unlock(&inode->i_lock);
6292 /* If the open stateid was bad, then recover it. */
6293 state = lgp->args.ctx->state;
6294 } else {
6295 LIST_HEAD(head);
6296
6297 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6298 spin_unlock(&inode->i_lock);
6299 /* Mark the bad layout state as invalid, then
6300 * retry using the open stateid. */
6301 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6302 }
6303 }
ee314c2a
TM		 6304 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6305 rpc_restart_call_prepare(task);
6306out:
b1f69b75
AA		 6307 dprintk("<-- %s\n", __func__);
6308}
6309
8554116e
IK		 6310static size_t max_response_pages(struct nfs_server *server)
6311{
6312 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6313 return nfs_page_array_len(0, max_resp_sz);
6314}
6315
6316static void nfs4_free_pages(struct page **pages, size_t size)
6317{
6318 int i;
6319
6320 if (!pages)
6321 return;
6322
6323 for (i = 0; i < size; i++) {
6324 if (!pages[i])
6325 break;
6326 __free_page(pages[i]);
6327 }
6328 kfree(pages);
6329}
6330
6331static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6332{
6333 struct page **pages;
6334 int i;
6335
6336 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6337 if (!pages) {
6338 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6339 return NULL;
6340 }
6341
6342 for (i = 0; i < size; i++) {
6343 pages[i] = alloc_page(gfp_flags);
6344 if (!pages[i]) {
6345 dprintk("%s: failed to allocate page\n", __func__);
6346 nfs4_free_pages(pages, size);
6347 return NULL;
6348 }
6349 }
6350
6351 return pages;
6352}
6353
b1f69b75
AA		 6354static void nfs4_layoutget_release(void *calldata)
6355{
6356 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6357 struct inode *inode = lgp->args.inode;
6358 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6359 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6360
6361 dprintk("--> %s\n", __func__);
8554116e 6362 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6363 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6364 put_nfs_open_context(lgp->args.ctx);
6365 kfree(calldata);
6366 dprintk("<-- %s\n", __func__);
6367}
6368
6369static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6370 .rpc_call_prepare = nfs4_layoutget_prepare,
6371 .rpc_call_done = nfs4_layoutget_done,
6372 .rpc_release = nfs4_layoutget_release,
6373};
6374
a0b0a6e3
TM		 6375struct pnfs_layout_segment *
6376nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6377{
a47970ff
WAA		 6378 struct inode *inode = lgp->args.inode;
6379 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6380 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6381 struct rpc_task *task;
6382 struct rpc_message msg = {
6383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6384 .rpc_argp = &lgp->args,
6385 .rpc_resp = &lgp->res,
6386 };
6387 struct rpc_task_setup task_setup_data = {
6388 .rpc_client = server->client,
6389 .rpc_message = &msg,
6390 .callback_ops = &nfs4_layoutget_call_ops,
6391 .callback_data = lgp,
6392 .flags = RPC_TASK_ASYNC,
6393 };
a0b0a6e3 6394 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6395 int status = 0;
6396
6397 dprintk("--> %s\n", __func__);
6398
8554116e
IK		 6399 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6400 if (!lgp->args.layout.pages) {
6401 nfs4_layoutget_release(lgp);
a0b0a6e3 6402 return ERR_PTR(-ENOMEM);
8554116e
IK		 6403 }
6404 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6405 lgp->args.timestamp = jiffies;
8554116e 6406
35124a09 6407 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6408 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6409 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6410
6411 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6412 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6413
b1f69b75
AA		 6414 task = rpc_run_task(&task_setup_data);
6415 if (IS_ERR(task))
a0b0a6e3 6416 return ERR_CAST(task);
b1f69b75 6417 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6418 if (status == 0)
6419 status = task->tk_status;
085b7a45
WAA		 6420 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6421 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6422 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6423 rpc_put_task(task);
6424 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6425 if (status)
6426 return ERR_PTR(status);
6427 return lseg;
b1f69b75
AA		 6428}
6429
cbe82603
BH		 6430static void
6431nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6432{
6433 struct nfs4_layoutreturn *lrp = calldata;
6434
6435 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6436 nfs41_setup_sequence(lrp->clp->cl_session,
6437 &lrp->args.seq_args,
6438 &lrp->res.seq_res,
6439 task);
cbe82603
BH		 6440}
6441
6442static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6443{
6444 struct nfs4_layoutreturn *lrp = calldata;
6445 struct nfs_server *server;
6446
6447 dprintk("--> %s\n", __func__);
6448
6ba7db34 6449 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6450 return;
6451
6452 server = NFS_SERVER(lrp->args.inode);
6453 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6454 rpc_restart_call_prepare(task);
cbe82603
BH		 6455 return;
6456 }
cbe82603
BH		 6457 dprintk("<-- %s\n", __func__);
6458}
6459
6460static void nfs4_layoutreturn_release(void *calldata)
6461{
6462 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6463 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6464
6465 dprintk("--> %s\n", __func__);
849b286f
TM		 6466 spin_lock(&lo->plh_inode->i_lock);
6467 if (lrp->res.lrs_present)
6468 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6469 lo->plh_block_lgets--;
6470 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6471 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6472 kfree(calldata);
6473 dprintk("<-- %s\n", __func__);
6474}
6475
6476static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6477 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6478 .rpc_call_done = nfs4_layoutreturn_done,
6479 .rpc_release = nfs4_layoutreturn_release,
6480};
6481
6482int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6483{
6484 struct rpc_task *task;
6485 struct rpc_message msg = {
6486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6487 .rpc_argp = &lrp->args,
6488 .rpc_resp = &lrp->res,
6489 };
6490 struct rpc_task_setup task_setup_data = {
6491 .rpc_client = lrp->clp->cl_rpcclient,
6492 .rpc_message = &msg,
6493 .callback_ops = &nfs4_layoutreturn_call_ops,
6494 .callback_data = lrp,
6495 };
6496 int status;
6497
6498 dprintk("--> %s\n", __func__);
9d12b216 6499 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6500 task = rpc_run_task(&task_setup_data);
6501 if (IS_ERR(task))
6502 return PTR_ERR(task);
6503 status = task->tk_status;
6504 dprintk("<-- %s status=%d\n", __func__, status);
6505 rpc_put_task(task);
6506 return status;
6507}
6508
7f11d8d3
AA		 6509/*
6510 * Retrieve the list of Data Server devices from the MDS.
6511 */
6512static int _nfs4_getdevicelist(struct nfs_server *server,
6513 const struct nfs_fh *fh,
6514 struct pnfs_devicelist *devlist)
6515{
6516 struct nfs4_getdevicelist_args args = {
6517 .fh = fh,
6518 .layoutclass = server->pnfs_curr_ld->id,
6519 };
6520 struct nfs4_getdevicelist_res res = {
6521 .devlist = devlist,
6522 };
6523 struct rpc_message msg = {
6524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6525 .rpc_argp = &args,
6526 .rpc_resp = &res,
6527 };
6528 int status;
6529
6530 dprintk("--> %s\n", __func__);
6531 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6532 &res.seq_res, 0);
6533 dprintk("<-- %s status=%d\n", __func__, status);
6534 return status;
6535}
6536
6537int nfs4_proc_getdevicelist(struct nfs_server *server,
6538 const struct nfs_fh *fh,
6539 struct pnfs_devicelist *devlist)
6540{
6541 struct nfs4_exception exception = { };
6542 int err;
6543
6544 do {
6545 err = nfs4_handle_exception(server,
6546 _nfs4_getdevicelist(server, fh, devlist),
6547 &exception);
6548 } while (exception.retry);
6549
6550 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6551 err, devlist->num_devs);
6552
6553 return err;
6554}
6555EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6556
b1f69b75
AA		 6557static int
6558_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6559{
6560 struct nfs4_getdeviceinfo_args args = {
6561 .pdev = pdev,
6562 };
6563 struct nfs4_getdeviceinfo_res res = {
6564 .pdev = pdev,
6565 };
6566 struct rpc_message msg = {
6567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6568 .rpc_argp = &args,
6569 .rpc_resp = &res,
6570 };
6571 int status;
6572
6573 dprintk("--> %s\n", __func__);
7c513058 6574 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6575 dprintk("<-- %s status=%d\n", __func__, status);
6576
6577 return status;
6578}
6579
6580int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6581{
6582 struct nfs4_exception exception = { };
6583 int err;
6584
6585 do {
6586 err = nfs4_handle_exception(server,
6587 _nfs4_proc_getdeviceinfo(server, pdev),
6588 &exception);
6589 } while (exception.retry);
6590 return err;
6591}
6592EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6593
863a3c6c
AA		 6594static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6595{
6596 struct nfs4_layoutcommit_data *data = calldata;
6597 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6598 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6599
d9afbd1b
TM		 6600 nfs41_setup_sequence(session,
6601 &data->args.seq_args,
6602 &data->res.seq_res,
6603 task);
863a3c6c
AA		 6604}
6605
6606static void
6607nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6608{
6609 struct nfs4_layoutcommit_data *data = calldata;
6610 struct nfs_server *server = NFS_SERVER(data->args.inode);
6611
6ba7db34 6612 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6613 return;
6614
6615 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6616 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6617 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6618 case -NFS4ERR_BADLAYOUT: /* no layout */
6619 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6620 task->tk_status = 0;
e59d27e0
TM		 6621 break;
6622 case 0:
863a3c6c
AA		 6623 nfs_post_op_update_inode_force_wcc(data->args.inode,
6624 data->res.fattr);
e59d27e0
TM		 6625 break;
6626 default:
6627 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6628 rpc_restart_call_prepare(task);
6629 return;
6630 }
6631 }
863a3c6c
AA		 6632}
6633
6634static void nfs4_layoutcommit_release(void *calldata)
6635{
6636 struct nfs4_layoutcommit_data *data = calldata;
6637
db29c089 6638 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6639 put_rpccred(data->cred);
6640 kfree(data);
6641}
6642
6643static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6644 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6645 .rpc_call_done = nfs4_layoutcommit_done,
6646 .rpc_release = nfs4_layoutcommit_release,
6647};
6648
6649int
ef311537 6650nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6651{
6652 struct rpc_message msg = {
6653 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6654 .rpc_argp = &data->args,
6655 .rpc_resp = &data->res,
6656 .rpc_cred = data->cred,
6657 };
6658 struct rpc_task_setup task_setup_data = {
6659 .task = &data->task,
6660 .rpc_client = NFS_CLIENT(data->args.inode),
6661 .rpc_message = &msg,
6662 .callback_ops = &nfs4_layoutcommit_ops,
6663 .callback_data = data,
6664 .flags = RPC_TASK_ASYNC,
6665 };
6666 struct rpc_task *task;
6667 int status = 0;
6668
6669 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6670 "lbw: %llu inode %lu\n",
6671 data->task.tk_pid, sync,
6672 data->args.lastbytewritten,
6673 data->args.inode->i_ino);
6674
9d12b216 6675 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6676 task = rpc_run_task(&task_setup_data);
6677 if (IS_ERR(task))
6678 return PTR_ERR(task);
ef311537 6679 if (sync == false)
863a3c6c
AA		 6680 goto out;
6681 status = nfs4_wait_for_completion_rpc_task(task);
6682 if (status != 0)
6683 goto out;
6684 status = task->tk_status;
6685out:
6686 dprintk("%s: status %d\n", __func__, status);
6687 rpc_put_task(task);
6688 return status;
6689}
fca78d6d
BS		 6690
6691static int
6692_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6693 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6694{
6695 struct nfs41_secinfo_no_name_args args = {
6696 .style = SECINFO_STYLE_CURRENT_FH,
6697 };
6698 struct nfs4_secinfo_res res = {
6699 .flavors = flavors,
6700 };
6701 struct rpc_message msg = {
6702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6703 .rpc_argp = &args,
6704 .rpc_resp = &res,
6705 };
6706 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6707}
6708
6709static int
6710nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6711 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6712{
6713 struct nfs4_exception exception = { };
6714 int err;
6715 do {
6716 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6717 switch (err) {
6718 case 0:
6719 case -NFS4ERR_WRONGSEC:
c1942219 6720 case -ENOTSUPP:
05e9cfb4 6721 goto out;
fca78d6d
BS		 6722 default:
6723 err = nfs4_handle_exception(server, err, &exception);
6724 }
6725 } while (exception.retry);
05e9cfb4 6726out:
fca78d6d
BS		 6727 return err;
6728}
6729
6730static int
6731nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6732 struct nfs_fsinfo *info)
6733{
6734 int err;
6735 struct page *page;
6736 rpc_authflavor_t flavor;
6737 struct nfs4_secinfo_flavors *flavors;
6738
6739 page = alloc_page(GFP_KERNEL);
6740 if (!page) {
6741 err = -ENOMEM;
6742 goto out;
6743 }
6744
6745 flavors = page_address(page);
6746 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6747
6748 /*
6749 * Fall back on "guess and check" method if
6750 * the server doesn't support SECINFO_NO_NAME
6751 */
c1942219 6752 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 6753 err = nfs4_find_root_sec(server, fhandle, info);
6754 goto out_freepage;
6755 }
6756 if (err)
6757 goto out_freepage;
6758
6759 flavor = nfs_find_best_sec(flavors);
6760 if (err == 0)
6761 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6762
6763out_freepage:
6764 put_page(page);
6765 if (err == -EACCES)
6766 return -EPERM;
6767out:
6768 return err;
6769}
1cab0652
BS		 6770
6771static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6772{
6773 int status;
6774 struct nfs41_test_stateid_args args = {
1cab0652 6775 .stateid = stateid,
7d974794
BS		 6776 };
6777 struct nfs41_test_stateid_res res;
6778 struct rpc_message msg = {
6779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6780 .rpc_argp = &args,
6781 .rpc_resp = &res,
6782 };
1cab0652 6783
38527b15 6784 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6785 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6786 nfs4_set_sequence_privileged(&args.seq_args);
6787 status = nfs4_call_sync_sequence(server->client, server, &msg,
6788 &args.seq_args, &res.seq_res);
38527b15
CL		 6789 if (status != NFS_OK) {
6790 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6791 return status;
38527b15
CL		 6792 }
6793 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6794 return -res.status;
7d974794
BS		 6795}
6796
38527b15
CL		 6797/**
6798 * nfs41_test_stateid - perform a TEST_STATEID operation
6799 *
6800 * @server: server / transport on which to perform the operation
6801 * @stateid: state ID to test
6802 *
6803 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6804 * Otherwise a negative NFS4ERR value is returned if the operation
6805 * failed or the state ID is not currently valid.
6806 */
1cab0652 6807static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6808{
6809 struct nfs4_exception exception = { };
6810 int err;
6811 do {
377e507d
CL		 6812 err = _nfs41_test_stateid(server, stateid);
6813 if (err != -NFS4ERR_DELAY)
6814 break;
6815 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6816 } while (exception.retry);
6817 return err;
6818}
9aeda35f 6819
7c1d5fae
TM		 6820struct nfs_free_stateid_data {
6821 struct nfs_server *server;
6822 struct nfs41_free_stateid_args args;
9aeda35f 6823 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 6824};
6825
6826static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
6827{
6828 struct nfs_free_stateid_data *data = calldata;
6829 nfs41_setup_sequence(nfs4_get_session(data->server),
6830 &data->args.seq_args,
6831 &data->res.seq_res,
6832 task);
6833}
6834
6835static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
6836{
6837 struct nfs_free_stateid_data *data = calldata;
6838
6839 nfs41_sequence_done(task, &data->res.seq_res);
6840
6841 switch (task->tk_status) {
6842 case -NFS4ERR_DELAY:
6843 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
6844 rpc_restart_call_prepare(task);
6845 }
6846}
6847
6848static void nfs41_free_stateid_release(void *calldata)
6849{
6850 kfree(calldata);
6851}
6852
6853const struct rpc_call_ops nfs41_free_stateid_ops = {
6854 .rpc_call_prepare = nfs41_free_stateid_prepare,
6855 .rpc_call_done = nfs41_free_stateid_done,
6856 .rpc_release = nfs41_free_stateid_release,
6857};
6858
6859static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
6860 nfs4_stateid *stateid,
6861 bool privileged)
6862{
9aeda35f
BS		 6863 struct rpc_message msg = {
6864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9aeda35f 6865 };
7c1d5fae
TM		 6866 struct rpc_task_setup task_setup = {
6867 .rpc_client = server->client,
6868 .rpc_message = &msg,
6869 .callback_ops = &nfs41_free_stateid_ops,
6870 .flags = RPC_TASK_ASYNC,
6871 };
6872 struct nfs_free_stateid_data *data;
9aeda35f 6873
38527b15 6874 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 6875 data = kmalloc(sizeof(*data), GFP_NOFS);
6876 if (!data)
6877 return ERR_PTR(-ENOMEM);
6878 data->server = server;
6879 nfs4_stateid_copy(&data->args.stateid, stateid);
6880
6881 task_setup.callback_data = data;
6882
6883 msg.rpc_argp = &data->args;
6884 msg.rpc_resp = &data->res;
6885 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6886 if (privileged)
6887 nfs4_set_sequence_privileged(&data->args.seq_args);
6888
6889 return rpc_run_task(&task_setup);
9aeda35f
BS		 6890}
6891
38527b15
CL		 6892/**
6893 * nfs41_free_stateid - perform a FREE_STATEID operation
6894 *
6895 * @server: server / transport on which to perform the operation
6896 * @stateid: state ID to release
6897 *
6898 * Returns NFS_OK if the server freed "stateid". Otherwise a
6899 * negative NFS4ERR value is returned.
6900 */
1cab0652 6901static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6902{
7c1d5fae
TM		 6903 struct rpc_task *task;
6904 int ret;
6905
6906 task = _nfs41_free_stateid(server, stateid, true);
6907 if (IS_ERR(task))
6908 return PTR_ERR(task);
6909 ret = rpc_wait_for_completion_task(task);
6910 if (!ret)
6911 ret = task->tk_status;
6912 rpc_put_task(task);
6913 return ret;
9aeda35f 6914}
36281caa 6915
c8b2d0bf
TM		 6916static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
6917{
6918 struct rpc_task *task;
6919
6920 task = _nfs41_free_stateid(server, &lsp->ls_stateid, false);
6921 nfs4_free_lock_state(server, lsp);
6922 if (IS_ERR(task))
6923 return PTR_ERR(task);
6924 rpc_put_task(task);
6925 return 0;
6926}
6927
36281caa
TM		 6928static bool nfs41_match_stateid(const nfs4_stateid *s1,
6929 const nfs4_stateid *s2)
6930{
2d2f24ad 6931 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6932 return false;
6933
2d2f24ad 6934 if (s1->seqid == s2->seqid)
36281caa 6935 return true;
2d2f24ad 6936 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6937 return true;
6938
6939 return false;
6940}
6941
557134a3
AA		 6942#endif /* CONFIG_NFS_V4_1 */
6943
36281caa
TM		 6944static bool nfs4_match_stateid(const nfs4_stateid *s1,
6945 const nfs4_stateid *s2)
6946{
f597c537 6947 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6948}
6949
6950
17280175 6951static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6952 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6953 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6954 .recover_open = nfs4_open_reclaim,
6955 .recover_lock = nfs4_lock_reclaim,
591d71cb 6956 .establish_clid = nfs4_init_clientid,
90a16617 6957 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6958 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6959};
6960
591d71cb 6961#if defined(CONFIG_NFS_V4_1)
17280175 6962static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6963 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6964 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6965 .recover_open = nfs4_open_reclaim,
6966 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6967 .establish_clid = nfs41_init_clientid,
b4b82607 6968 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6969 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6970 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6971};
6972#endif /* CONFIG_NFS_V4_1 */
6973
17280175 6974static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6975 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6976 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6977 .recover_open = nfs4_open_expired,
6978 .recover_lock = nfs4_lock_expired,
6979 .establish_clid = nfs4_init_clientid,
90a16617 6980 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6981};
6982
6983#if defined(CONFIG_NFS_V4_1)
17280175 6984static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6985 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6986 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6987 .recover_open = nfs41_open_expired,
6988 .recover_lock = nfs41_lock_expired,
4d643d1d 6989 .establish_clid = nfs41_init_clientid,
b4b82607 6990 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6991};
591d71cb 6992#endif /* CONFIG_NFS_V4_1 */
1da177e4 6993
17280175 6994static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6995 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6996 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6997 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6998};
6999
7000#if defined(CONFIG_NFS_V4_1)
17280175 7001static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7002 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7003 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7004 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7005};
7006#endif
7007
97dc1359
TM		 7008static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7009 .minor_version = 0,
39c6daae
TM		 7010 .init_caps = NFS_CAP_READDIRPLUS
7011 | NFS_CAP_ATOMIC_OPEN
7012 | NFS_CAP_CHANGE_ATTR
7013 | NFS_CAP_POSIX_LOCK,
97dc1359 7014 .call_sync = _nfs4_call_sync,
36281caa 7015 .match_stateid = nfs4_match_stateid,
fca78d6d 7016 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7017 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7018 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7019 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7020 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7021};
7022
7023#if defined(CONFIG_NFS_V4_1)
7024static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7025 .minor_version = 1,
39c6daae
TM		 7026 .init_caps = NFS_CAP_READDIRPLUS
7027 | NFS_CAP_ATOMIC_OPEN
7028 | NFS_CAP_CHANGE_ATTR
3b66486c 7029 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7030 | NFS_CAP_STATEID_NFSV41
7031 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7032 .call_sync = nfs4_call_sync_sequence,
36281caa 7033 .match_stateid = nfs41_match_stateid,
fca78d6d 7034 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7035 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7036 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7037 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7038 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7039};
7040#endif
7041
97dc1359
TM		 7042const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7043 [0] = &nfs_v4_0_minor_ops,
7044#if defined(CONFIG_NFS_V4_1)
7045 [1] = &nfs_v4_1_minor_ops,
7046#endif
7047};
7048
73a79706
BS		 7049const struct inode_operations nfs4_dir_inode_operations = {
7050 .create = nfs_create,
7051 .lookup = nfs_lookup,
7052 .atomic_open = nfs_atomic_open,
7053 .link = nfs_link,
7054 .unlink = nfs_unlink,
7055 .symlink = nfs_symlink,
7056 .mkdir = nfs_mkdir,
7057 .rmdir = nfs_rmdir,
7058 .mknod = nfs_mknod,
7059 .rename = nfs_rename,
7060 .permission = nfs_permission,
7061 .getattr = nfs_getattr,
7062 .setattr = nfs_setattr,
7063 .getxattr = generic_getxattr,
7064 .setxattr = generic_setxattr,
7065 .listxattr = generic_listxattr,
7066 .removexattr = generic_removexattr,
7067};
7068
92e1d5be 7069static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7070 .permission = nfs_permission,
7071 .getattr = nfs_getattr,
7072 .setattr = nfs_setattr,
64c2ce8b
AK		 7073 .getxattr = generic_getxattr,
7074 .setxattr = generic_setxattr,
7075 .listxattr = generic_listxattr,
7076 .removexattr = generic_removexattr,
6b3b5496
BF		 7077};
7078
509de811 7079const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7080 .version = 4, /* protocol version */
7081 .dentry_ops = &nfs4_dentry_operations,
7082 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7083 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7084 .file_ops = &nfs4_file_operations,
1da177e4 7085 .getroot = nfs4_proc_get_root,
281cad46 7086 .submount = nfs4_submount,
ff9099f2 7087 .try_mount = nfs4_try_mount,
1da177e4
LT		 7088 .getattr = nfs4_proc_getattr,
7089 .setattr = nfs4_proc_setattr,
7090 .lookup = nfs4_proc_lookup,
7091 .access = nfs4_proc_access,
7092 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7093 .create = nfs4_proc_create,
7094 .remove = nfs4_proc_remove,
7095 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7096 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7097 .unlink_done = nfs4_proc_unlink_done,
7098 .rename = nfs4_proc_rename,
d3d4152a 7099 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7100 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7101 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7102 .link = nfs4_proc_link,
7103 .symlink = nfs4_proc_symlink,
7104 .mkdir = nfs4_proc_mkdir,
7105 .rmdir = nfs4_proc_remove,
7106 .readdir = nfs4_proc_readdir,
7107 .mknod = nfs4_proc_mknod,
7108 .statfs = nfs4_proc_statfs,
7109 .fsinfo = nfs4_proc_fsinfo,
7110 .pathconf = nfs4_proc_pathconf,
e9326dca 7111 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7112 .decode_dirent = nfs4_decode_dirent,
7113 .read_setup = nfs4_proc_read_setup,
1abb5088 7114 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7115 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7116 .read_done = nfs4_read_done,
1da177e4 7117 .write_setup = nfs4_proc_write_setup,
57208fa7 7118 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7119 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7120 .write_done = nfs4_write_done,
1da177e4 7121 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7122 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7123 .commit_done = nfs4_commit_done,
1da177e4 7124 .lock = nfs4_proc_lock,
e50a1c2e 7125 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7126 .close_context = nfs4_close_context,
2b484297 7127 .open_context = nfs4_atomic_open,
011e2a7f 7128 .have_delegation = nfs4_have_delegation,
57ec14c5 7129 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7130 .alloc_client = nfs4_alloc_client,
45a52a02 7131 .init_client = nfs4_init_client,
cdb7eced 7132 .free_client = nfs4_free_client,
1179acc6
BS		 7133 .create_server = nfs4_create_server,
7134 .clone_server = nfs_clone_server,
1da177e4
LT		 7135};
7136
64c2ce8b
AK		 7137static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7138 .prefix = XATTR_NAME_NFSV4_ACL,
7139 .list = nfs4_xattr_list_nfs4_acl,
7140 .get = nfs4_xattr_get_nfs4_acl,
7141 .set = nfs4_xattr_set_nfs4_acl,
7142};
7143
7144const struct xattr_handler *nfs4_xattr_handlers[] = {
7145 &nfs4_xattr_nfs4_acl_handler,
7146 NULL
7147};
7148
1da177e4
LT		 7149/*
7150 * Local variables:
7151 * c-basic-offset: 8
7152 * End:
7153 */
kernel source for telekom puls (alcatel/mediatek)