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Merge tag 'v3.10.90' into update
[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);
270e234c 1419 return -EAGAIN;
be76b5b6
TM		 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
361eeee7
TM		 1848static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
1849{
1850 nfs_remove_bad_delegation(state->inode);
1851 write_seqlock(&state->seqlock);
1852 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1853 write_sequnlock(&state->seqlock);
1854 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1855}
1856
1857static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
1858{
1859 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
1860 nfs_finish_clear_delegation_stateid(state);
1861}
1862
1863static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1864{
1865 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
1866 nfs40_clear_delegation_stateid(state);
1867 return nfs4_open_expired(sp, state);
1868}
1869
f062eb6c 1870#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1871static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1872{
f062eb6c 1873 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1874 nfs4_stateid *stateid = &state->stateid;
1875 int status;
1876
1877 /* If a state reset has been done, test_stateid is unneeded */
1878 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1879 return;
1880
1881 status = nfs41_test_stateid(server, stateid);
1882 if (status != NFS_OK) {
1883 /* Free the stateid unless the server explicitly
1884 * informs us the stateid is unrecognized. */
1885 if (status != -NFS4ERR_BAD_STATEID)
1886 nfs41_free_stateid(server, stateid);
6938867e 1887 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1888
6938867e
BS		 1889 write_seqlock(&state->seqlock);
1890 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1891 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1892 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1893 }
1894}
1895
1896/**
1897 * nfs41_check_open_stateid - possibly free an open stateid
1898 *
1899 * @state: NFSv4 state for an inode
1900 *
1901 * Returns NFS_OK if recovery for this stateid is now finished.
1902 * Otherwise a negative NFS4ERR value is returned.
1903 */
1904static int nfs41_check_open_stateid(struct nfs4_state *state)
1905{
1906 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1907 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1908 int status;
1909
1910 /* If a state reset has been done, test_stateid is unneeded */
1911 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1912 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1913 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1914 return -NFS4ERR_BAD_STATEID;
1915
1916 status = nfs41_test_stateid(server, stateid);
1917 if (status != NFS_OK) {
1918 /* Free the stateid unless the server explicitly
1919 * informs us the stateid is unrecognized. */
1920 if (status != -NFS4ERR_BAD_STATEID)
1921 nfs41_free_stateid(server, stateid);
1922
1923 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1924 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1925 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 1926 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 1927 }
1928 return status;
1929}
1930
1931static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1932{
eb64cf96 1933 int status;
b01dd1d8 1934
3e60ffdd
CL		 1935 nfs41_clear_delegation_stateid(state);
1936 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1937 if (status != NFS_OK)
1938 status = nfs4_open_expired(sp, state);
1939 return status;
f062eb6c
BS		 1940}
1941#endif
1942
aa53ed54
JL		 1943/*
1944 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1945 * fields corresponding to attributes that were used to store the verifier.
1946 * Make sure we clobber those fields in the later setattr call
1947 */
1948static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1949{
1950 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1951 !(sattr->ia_valid & ATTR_ATIME_SET))
1952 sattr->ia_valid |= ATTR_ATIME;
1953
1954 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1955 !(sattr->ia_valid & ATTR_MTIME_SET))
1956 sattr->ia_valid |= ATTR_MTIME;
1957}
1958
c21443c2
TM		 1959static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1960 fmode_t fmode,
1961 int flags,
1962 struct nfs4_state **res)
1963{
1964 struct nfs4_state_owner *sp = opendata->owner;
1965 struct nfs_server *server = sp->so_server;
1966 struct nfs4_state *state;
1967 unsigned int seq;
1968 int ret;
1969
1970 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1971
1972 ret = _nfs4_proc_open(opendata);
1973 if (ret != 0)
1974 goto out;
1975
1976 state = nfs4_opendata_to_nfs4_state(opendata);
1977 ret = PTR_ERR(state);
1978 if (IS_ERR(state))
1979 goto out;
1980 if (server->caps & NFS_CAP_POSIX_LOCK)
1981 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1982
1983 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1984 if (ret != 0)
1985 goto out;
1986
91876b13 1987 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1988 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1989 *res = state;
1990out:
1991 return ret;
1992}
1993
1da177e4 1994/*
24ac23ab 1995 * Returns a referenced nfs4_state
1da177e4 1996 */
82be417a
AA		 1997static int _nfs4_do_open(struct inode *dir,
1998 struct dentry *dentry,
1999 fmode_t fmode,
2000 int flags,
2001 struct iattr *sattr,
2002 struct rpc_cred *cred,
2003 struct nfs4_state **res,
2004 struct nfs4_threshold **ctx_th)
1da177e4
LT		 2005{
2006 struct nfs4_state_owner *sp;
2007 struct nfs4_state *state = NULL;
2008 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2009 struct nfs4_opendata *opendata;
49f9a0fa 2010 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 2011 int status;
1da177e4
LT		 2012
2013 /* Protect against reboot recovery conflicts */
1da177e4 2014 status = -ENOMEM;
d1e284d5
TM		 2015 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2016 if (sp == NULL) {
1da177e4
LT		 2017 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2018 goto out_err;
2019 }
58d9714a
TM		 2020 status = nfs4_recover_expired_lease(server);
2021 if (status != 0)
b4454fe1 2022 goto err_put_state_owner;
82a2c1b7
AV		 2023 if (dentry->d_inode != NULL)
2024 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2025 status = -ENOMEM;
49f9a0fa
TM		 2026 if (dentry->d_inode)
2027 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2028 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 2029 claim, GFP_KERNEL);
e56e0b78 2030 if (opendata == NULL)
95d35cb4 2031 goto err_put_state_owner;
1da177e4 2032
82be417a
AA		 2033 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2034 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2035 if (!opendata->f_attr.mdsthreshold)
2036 goto err_opendata_put;
1549210f 2037 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2038 }
82a2c1b7
AV		 2039 if (dentry->d_inode != NULL)
2040 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2041
c21443c2 2042 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 2043 if (status != 0)
2044 goto err_opendata_put;
2045
9520ac79 2046 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2047 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2048 nfs4_exclusive_attrset(opendata, sattr);
2049
2050 nfs_fattr_init(opendata->o_res.f_attr);
2051 status = nfs4_do_setattr(state->inode, cred,
2052 opendata->o_res.f_attr, sattr,
2053 state);
2054 if (status == 0)
2055 nfs_setattr_update_inode(state->inode, sattr);
2056 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2057 }
82be417a
AA		 2058
2059 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2060 *ctx_th = opendata->f_attr.mdsthreshold;
2061 else
2062 kfree(opendata->f_attr.mdsthreshold);
2063 opendata->f_attr.mdsthreshold = NULL;
2064
c6d00e63 2065 nfs4_opendata_put(opendata);
1da177e4 2066 nfs4_put_state_owner(sp);
1da177e4
LT		 2067 *res = state;
2068 return 0;
c6d00e63 2069err_opendata_put:
82be417a 2070 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2071 nfs4_opendata_put(opendata);
e56e0b78
TM		 2072err_put_state_owner:
2073 nfs4_put_state_owner(sp);
1da177e4 2074out_err:
1da177e4
LT		 2075 *res = NULL;
2076 return status;
2077}
2078
2079
82be417a
AA		 2080static struct nfs4_state *nfs4_do_open(struct inode *dir,
2081 struct dentry *dentry,
2082 fmode_t fmode,
2083 int flags,
2084 struct iattr *sattr,
2085 struct rpc_cred *cred,
2086 struct nfs4_threshold **ctx_th)
1da177e4 2087{
49f9a0fa 2088 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2089 struct nfs4_exception exception = { };
2090 struct nfs4_state *res;
2091 int status;
2092
6168f62c 2093 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2094 do {
82be417a
AA		 2095 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2096 &res, ctx_th);
1da177e4
LT		 2097 if (status == 0)
2098 break;
2099 /* NOTE: BAD_SEQID means the server and client disagree about the
2100 * book-keeping w.r.t. state-changing operations
2101 * (OPEN/CLOSE/LOCK/LOCKU...)
2102 * It is actually a sign of a bug on the client or on the server.
2103 *
2104 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2105 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2106 * have unhashed the old state_owner for us, and that we can
2107 * therefore safely retry using a new one. We should still warn
2108 * the user though...
2109 */
2110 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2111 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2112 " returned a bad sequence-id error!\n",
2113 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2114 exception.retry = 1;
2115 continue;
2116 }
550f5747
TM		 2117 /*
2118 * BAD_STATEID on OPEN means that the server cancelled our
2119 * state before it received the OPEN_CONFIRM.
2120 * Recover by retrying the request as per the discussion
2121 * on Page 181 of RFC3530.
2122 */
2123 if (status == -NFS4ERR_BAD_STATEID) {
2124 exception.retry = 1;
2125 continue;
2126 }
aac00a8d
TM		 2127 if (status == -EAGAIN) {
2128 /* We must have found a delegation */
2129 exception.retry = 1;
2130 continue;
2131 }
49f9a0fa
TM		 2132 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2133 continue;
2134 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2135 status, &exception));
2136 } while (exception.retry);
2137 return res;
2138}
2139
659bfcd6
TM		 2140static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2141 struct nfs_fattr *fattr, struct iattr *sattr,
2142 struct nfs4_state *state)
1da177e4 2143{
3e4f6290 2144 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2145 struct nfs_setattrargs arg = {
3e4f6290 2146 .fh = NFS_FH(inode),
1da177e4
LT		 2147 .iap = sattr,
2148 .server = server,
2149 .bitmask = server->attr_bitmask,
2150 };
2151 struct nfs_setattrres res = {
2152 .fattr = fattr,
2153 .server = server,
2154 };
2155 struct rpc_message msg = {
659bfcd6
TM		 2156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2157 .rpc_argp = &arg,
2158 .rpc_resp = &res,
2159 .rpc_cred = cred,
1da177e4 2160 };
26e976a8 2161 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2162 fmode_t fmode;
2163 bool truncate;
65e4308d 2164 int status;
1da177e4 2165
0e574af1 2166 nfs_fattr_init(fattr);
1da177e4 2167
ee3ae84e
TM		 2168 /* Servers should only apply open mode checks for file size changes */
2169 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2170 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2171
2172 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2173 /* Use that stateid */
2174 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2175 struct nfs_lockowner lockowner = {
2176 .l_owner = current->files,
2177 .l_pid = current->tgid,
2178 };
4fc8796d 2179 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2180 &lockowner);
08e9eac4 2181 } else
f597c537 2182 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2183
7c513058 2184 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2185 if (status == 0 && state != NULL)
2186 renew_lease(server, timestamp);
65e4308d 2187 return status;
1da177e4
LT		 2188}
2189
659bfcd6
TM		 2190static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2191 struct nfs_fattr *fattr, struct iattr *sattr,
2192 struct nfs4_state *state)
1da177e4 2193{
3e4f6290 2194 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2195 struct nfs4_exception exception = {
2196 .state = state,
3114ea7a 2197 .inode = inode,
a1d0b5ee 2198 };
1da177e4
LT		 2199 int err;
2200 do {
451146be
TM		 2201 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2202 switch (err) {
2203 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2204 if (!(sattr->ia_valid & ATTR_SIZE)) {
2205 pr_warn_once("NFSv4: server %s is incorrectly "
2206 "applying open mode checks to "
2207 "a SETATTR that is not "
2208 "changing file size.\n",
2209 server->nfs_client->cl_hostname);
2210 }
451146be
TM		 2211 if (state && !(state->state & FMODE_WRITE)) {
2212 err = -EBADF;
2213 if (sattr->ia_valid & ATTR_OPEN)
2214 err = -EACCES;
2215 goto out;
2216 }
2217 }
2218 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2219 } while (exception.retry);
451146be 2220out:
1da177e4
LT		 2221 return err;
2222}
2223
2224struct nfs4_closedata {
2225 struct inode *inode;
2226 struct nfs4_state *state;
2227 struct nfs_closeargs arg;
2228 struct nfs_closeres res;
516a6af6 2229 struct nfs_fattr fattr;
26e976a8 2230 unsigned long timestamp;
f7e8917a
FI		 2231 bool roc;
2232 u32 roc_barrier;
1da177e4
LT		 2233};
2234
963d8fe5 2235static void nfs4_free_closedata(void *data)
9512135d 2236{
963d8fe5
TM		 2237 struct nfs4_closedata *calldata = data;
2238 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2239 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2240
f7e8917a
FI		 2241 if (calldata->roc)
2242 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2243 nfs4_put_open_state(calldata->state);
2244 nfs_free_seqid(calldata->arg.seqid);
9512135d 2245 nfs4_put_state_owner(sp);
322b2b90 2246 nfs_sb_deactive(sb);
9512135d
TM		 2247 kfree(calldata);
2248}
2249
88069f77
TM		 2250static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2251 fmode_t fmode)
2252{
2253 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2254 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2255 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2256 case FMODE_WRITE:
88069f77 2257 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2258 break;
2259 case FMODE_READ:
88069f77 2260 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2261 break;
2262 case 0:
2263 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2264 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2265 clear_bit(NFS_OPEN_STATE, &state->flags);
2266 }
88069f77
TM		 2267 spin_unlock(&state->owner->so_lock);
2268}
2269
963d8fe5 2270static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2271{
963d8fe5 2272 struct nfs4_closedata *calldata = data;
1da177e4 2273 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2274 struct nfs_server *server = NFS_SERVER(calldata->inode);
2275
a3ca5651 2276 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2277 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2278 return;
1da177e4
LT		 2279 /* hmm. we are done with the inode, and in the process of freeing
2280 * the state_owner. we keep this around to process errors
2281 */
1da177e4
LT		 2282 switch (task->tk_status) {
2283 case 0:
f7e8917a
FI		 2284 if (calldata->roc)
2285 pnfs_roc_set_barrier(state->inode,
2286 calldata->roc_barrier);
45328c35 2287 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2288 renew_lease(server, calldata->timestamp);
88069f77
TM		 2289 nfs4_close_clear_stateid_flags(state,
2290 calldata->arg.fmode);
1da177e4
LT		 2291 break;
2292 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2293 case -NFS4ERR_OLD_STATEID:
2294 case -NFS4ERR_BAD_STATEID:
1da177e4 2295 case -NFS4ERR_EXPIRED:
dc0b027d 2296 if (calldata->arg.fmode == 0)
9e33bed5 2297 break;
1da177e4 2298 default:
72211dbe
TM		 2299 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2300 rpc_restart_call_prepare(task);
1da177e4 2301 }
72211dbe 2302 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2303 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2304 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2305}
2306
4ce70ada 2307static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2308{
4ce70ada 2309 struct nfs4_closedata *calldata = data;
9512135d 2310 struct nfs4_state *state = calldata->state;
7fdab069 2311 struct inode *inode = calldata->inode;
569ae35a 2312 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2313 int call_close = 0;
9512135d 2314
a3ca5651 2315 dprintk("%s: begin!\n", __func__);
963d8fe5 2316 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2317 goto out_wait;
003707c7 2318
88069f77 2319 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2320 spin_lock(&state->owner->so_lock);
569ae35a
TM		 2321 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2322 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2323 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 2324 /* Calculate the change in open mode */
a6ac6009 2325 calldata->arg.fmode = 0;
e7616923 2326 if (state->n_rdwr == 0) {
a6ac6009
TM		 2327 if (state->n_rdonly == 0)
2328 call_close |= is_rdonly;
2329 else if (is_rdonly)
2330 calldata->arg.fmode |= FMODE_READ;
2331 if (state->n_wronly == 0)
2332 call_close |= is_wronly;
2333 else if (is_wronly)
2334 calldata->arg.fmode |= FMODE_WRITE;
2335 } else if (is_rdwr)
2336 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2337
2338 if (calldata->arg.fmode == 0)
2339 call_close |= is_rdwr;
2340
5d422301
TM		 2341 if (!nfs4_valid_open_stateid(state))
2342 call_close = 0;
4cecb76f 2343 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2344
2345 if (!call_close) {
963d8fe5 2346 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2347 goto out_no_action;
9512135d 2348 }
88069f77 2349
f7e8917a 2350 if (calldata->arg.fmode == 0) {
88069f77 2351 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2352 if (calldata->roc &&
b9536ad5
AA		 2353 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2354 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2355 goto out_wait;
b9536ad5 2356 }
f7e8917a 2357 }
88069f77 2358
516a6af6 2359 nfs_fattr_init(calldata->res.fattr);
26e976a8 2360 calldata->timestamp = jiffies;
7fdab069 2361 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2362 &calldata->arg.seq_args,
2363 &calldata->res.seq_res,
2240a9e2
TM		 2364 task) != 0)
2365 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2366 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2367 return;
2368out_no_action:
2369 task->tk_action = NULL;
2370out_wait:
2371 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2372}
2373
963d8fe5 2374static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2375 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2376 .rpc_call_done = nfs4_close_done,
2377 .rpc_release = nfs4_free_closedata,
2378};
2379
1da177e4
LT		 2380/*
2381 * It is possible for data to be read/written from a mem-mapped file
2382 * after the sys_close call (which hits the vfs layer as a flush).
2383 * This means that we can't safely call nfsv4 close on a file until
2384 * the inode is cleared. This in turn means that we are not good
2385 * NFSv4 citizens - we do not indicate to the server to update the file's
2386 * share state even when we are done with one of the three share
2387 * stateid's in the inode.
2388 *
2389 * NOTE: Caller must be holding the sp->so_owner semaphore!
2390 */
1f7977c1 2391int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2392{
4a35bd41 2393 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2394 struct nfs4_closedata *calldata;
b39e625b
TM		 2395 struct nfs4_state_owner *sp = state->owner;
2396 struct rpc_task *task;
5138fde0
TM		 2397 struct rpc_message msg = {
2398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2399 .rpc_cred = state->owner->so_cred,
2400 };
c970aa85
TM		 2401 struct rpc_task_setup task_setup_data = {
2402 .rpc_client = server->client,
5138fde0 2403 .rpc_message = &msg,
c970aa85 2404 .callback_ops = &nfs4_close_ops,
101070ca 2405 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2406 .flags = RPC_TASK_ASYNC,
2407 };
9512135d 2408 int status = -ENOMEM;
1da177e4 2409
8535b2be 2410 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2411 if (calldata == NULL)
9512135d 2412 goto out;
9d12b216 2413 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2414 calldata->inode = state->inode;
1da177e4 2415 calldata->state = state;
4a35bd41 2416 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2417 calldata->arg.stateid = &state->open_stateid;
1da177e4 2418 /* Serialization for the sequence id */
8535b2be 2419 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2420 if (calldata->arg.seqid == NULL)
2421 goto out_free_calldata;
dc0b027d 2422 calldata->arg.fmode = 0;
a65318bf 2423 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2424 calldata->res.fattr = &calldata->fattr;
c1d51931 2425 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2426 calldata->res.server = server;
1f7977c1 2427 calldata->roc = pnfs_roc(state->inode);
643168c2 2428 nfs_sb_active(calldata->inode->i_sb);
9512135d 2429
1174dd1f
TM		 2430 msg.rpc_argp = &calldata->arg;
2431 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2432 task_setup_data.callback_data = calldata;
2433 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2434 if (IS_ERR(task))
2435 return PTR_ERR(task);
a49c3c77
TM		 2436 status = 0;
2437 if (wait)
2438 status = rpc_wait_for_completion_task(task);
b39e625b 2439 rpc_put_task(task);
a49c3c77 2440 return status;
9512135d
TM		 2441out_free_calldata:
2442 kfree(calldata);
2443out:
b39e625b
TM		 2444 nfs4_put_open_state(state);
2445 nfs4_put_state_owner(sp);
9512135d 2446 return status;
1da177e4
LT		 2447}
2448
2b484297 2449static struct inode *
cd9a1c0e 2450nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2451{
1da177e4 2452 struct nfs4_state *state;
1da177e4 2453
565277f6 2454 /* Protect against concurrent sillydeletes */
82be417a
AA		 2455 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2456 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2457 if (IS_ERR(state))
2458 return ERR_CAST(state);
cd9a1c0e 2459 ctx->state = state;
f46e0bd3 2460 return igrab(state->inode);
1da177e4
LT		 2461}
2462
1185a552 2463static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2464{
2465 if (ctx->state == NULL)
2466 return;
2467 if (is_sync)
643168c2 2468 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2469 else
643168c2 2470 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2471}
1da177e4
LT		 2472
2473static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2474{
43652ad5
BH		 2475 struct nfs4_server_caps_arg args = {
2476 .fhandle = fhandle,
2477 };
1da177e4
LT		 2478 struct nfs4_server_caps_res res = {};
2479 struct rpc_message msg = {
2480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2481 .rpc_argp = &args,
1da177e4
LT		 2482 .rpc_resp = &res,
2483 };
2484 int status;
2485
7c513058 2486 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2487 if (status == 0) {
2488 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2489 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2490 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2491 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2492 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2493 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2494 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2495 server->caps |= NFS_CAP_ACLS;
2496 if (res.has_links != 0)
2497 server->caps |= NFS_CAP_HARDLINKS;
2498 if (res.has_symlinks != 0)
2499 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2500 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2501 server->caps |= NFS_CAP_FILEID;
2502 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2503 server->caps |= NFS_CAP_MODE;
2504 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2505 server->caps |= NFS_CAP_NLINK;
2506 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2507 server->caps |= NFS_CAP_OWNER;
2508 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2509 server->caps |= NFS_CAP_OWNER_GROUP;
2510 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2511 server->caps |= NFS_CAP_ATIME;
2512 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2513 server->caps |= NFS_CAP_CTIME;
2514 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2515 server->caps |= NFS_CAP_MTIME;
2516
a65318bf
TM		 2517 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2518 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2519 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2520 server->acl_bitmask = res.acl_bitmask;
264e6351 2521 server->fh_expire_type = res.fh_expire_type;
1da177e4 2522 }
cccef3b9 2523
1da177e4
LT		 2524 return status;
2525}
2526
55a97593 2527int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2528{
2529 struct nfs4_exception exception = { };
2530 int err;
2531 do {
2532 err = nfs4_handle_exception(server,
2533 _nfs4_server_capabilities(server, fhandle),
2534 &exception);
2535 } while (exception.retry);
2536 return err;
2537}
2538
2539static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2540 struct nfs_fsinfo *info)
2541{
1da177e4
LT		 2542 struct nfs4_lookup_root_arg args = {
2543 .bitmask = nfs4_fattr_bitmap,
2544 };
2545 struct nfs4_lookup_res res = {
2546 .server = server,
0e574af1 2547 .fattr = info->fattr,
1da177e4
LT		 2548 .fh = fhandle,
2549 };
2550 struct rpc_message msg = {
2551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2552 .rpc_argp = &args,
2553 .rpc_resp = &res,
2554 };
008f55d0 2555
0e574af1 2556 nfs_fattr_init(info->fattr);
7c513058 2557 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2558}
2559
2560static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2561 struct nfs_fsinfo *info)
2562{
2563 struct nfs4_exception exception = { };
2564 int err;
2565 do {
fb8a5ba8
BS		 2566 err = _nfs4_lookup_root(server, fhandle, info);
2567 switch (err) {
2568 case 0:
2569 case -NFS4ERR_WRONGSEC:
05e9cfb4 2570 goto out;
fb8a5ba8
BS		 2571 default:
2572 err = nfs4_handle_exception(server, err, &exception);
2573 }
1da177e4 2574 } while (exception.retry);
05e9cfb4 2575out:
1da177e4
LT		 2576 return err;
2577}
2578
8f70e95f
BS		 2579static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2580 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2581{
2582 struct rpc_auth *auth;
2583 int ret;
2584
2585 auth = rpcauth_create(flavor, server->client);
e8d920c5 2586 if (IS_ERR(auth)) {
75bc8821 2587 ret = -EACCES;
8f70e95f
BS		 2588 goto out;
2589 }
2590 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2591out:
2592 return ret;
2593}
2594
9a744ba3
CL		 2595/*
2596 * Retry pseudoroot lookup with various security flavors. We do this when:
2597 *
2598 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2599 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2600 *
2601 * Returns zero on success, or a negative NFS4ERR value, or a
2602 * negative errno value.
2603 */
801a16dc 2604static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2605 struct nfs_fsinfo *info)
1da177e4 2606{
9a744ba3
CL		 2607 /* Per 3530bis 15.33.5 */
2608 static const rpc_authflavor_t flav_array[] = {
2609 RPC_AUTH_GSS_KRB5P,
2610 RPC_AUTH_GSS_KRB5I,
2611 RPC_AUTH_GSS_KRB5,
c4eafe11 2612 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2613 RPC_AUTH_NULL,
2614 };
2615 int status = -EPERM;
2616 size_t i;
6a1a1e34 2617
9a744ba3 2618 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2619 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2620 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2621 continue;
2622 break;
8f70e95f 2623 }
9a744ba3 2624
fb8a5ba8
BS		 2625 /*
2626 * -EACCESS could mean that the user doesn't have correct permissions
2627 * to access the mount. It could also mean that we tried to mount
2628 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2629 * existing mount programs don't handle -EACCES very well so it should
2630 * be mapped to -EPERM instead.
2631 */
2632 if (status == -EACCES)
2633 status = -EPERM;
801a16dc
BS		 2634 return status;
2635}
2636
2ed4b95b
CL		 2637static int nfs4_do_find_root_sec(struct nfs_server *server,
2638 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2639{
2640 int mv = server->nfs_client->cl_minorversion;
2641 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2642}
2643
2644/**
2645 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2646 * @server: initialized nfs_server handle
2647 * @fhandle: we fill in the pseudo-fs root file handle
2648 * @info: we fill in an FSINFO struct
2649 *
2650 * Returns zero on success, or a negative errno.
801a16dc 2651 */
3028eb2b
BS		 2652int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2653 struct nfs_fsinfo *info)
801a16dc 2654{
2ed4b95b
CL		 2655 int status;
2656
2657 status = nfs4_lookup_root(server, fhandle, info);
2658 if ((status == -NFS4ERR_WRONGSEC) &&
2659 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2660 status = nfs4_do_find_root_sec(server, fhandle, info);
2661
1da177e4
LT		 2662 if (status == 0)
2663 status = nfs4_server_capabilities(server, fhandle);
2664 if (status == 0)
2665 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2666
c12e87f4 2667 return nfs4_map_errors(status);
1da177e4
LT		 2668}
2669
bae36241
BS		 2670static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2671 struct nfs_fsinfo *info)
2672{
2673 int error;
2674 struct nfs_fattr *fattr = info->fattr;
2675
2676 error = nfs4_server_capabilities(server, mntfh);
2677 if (error < 0) {
2678 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2679 return error;
2680 }
2681
2682 error = nfs4_proc_getattr(server, mntfh, fattr);
2683 if (error < 0) {
2684 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2685 return error;
2686 }
2687
2688 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2689 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2690 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2691
2692 return error;
2693}
2694
6b97fd3d
MN		 2695/*
2696 * Get locations and (maybe) other attributes of a referral.
2697 * Note that we'll actually follow the referral later when
2698 * we detect fsid mismatch in inode revalidation
2699 */
f05d147f
BS		 2700static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2701 const struct qstr *name, struct nfs_fattr *fattr,
2702 struct nfs_fh *fhandle)
6b97fd3d
MN		 2703{
2704 int status = -ENOMEM;
2705 struct page *page = NULL;
2706 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2707
2708 page = alloc_page(GFP_KERNEL);
2709 if (page == NULL)
2710 goto out;
2711 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2712 if (locations == NULL)
2713 goto out;
2714
f05d147f 2715 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2716 if (status != 0)
2717 goto out;
2718 /* Make sure server returned a different fsid for the referral */
2719 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2720 dprintk("%s: server did not return a different fsid for"
2721 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2722 status = -EIO;
2723 goto out;
2724 }
533eb461
AA		 2725 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2726 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2727
533eb461 2728 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2729 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2730 memset(fhandle, 0, sizeof(struct nfs_fh));
2731out:
2732 if (page)
2733 __free_page(page);
5d7ca35a 2734 kfree(locations);
6b97fd3d
MN		 2735 return status;
2736}
2737
1da177e4
LT		 2738static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2739{
2740 struct nfs4_getattr_arg args = {
2741 .fh = fhandle,
2742 .bitmask = server->attr_bitmask,
2743 };
2744 struct nfs4_getattr_res res = {
2745 .fattr = fattr,
2746 .server = server,
2747 };
2748 struct rpc_message msg = {
2749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2750 .rpc_argp = &args,
2751 .rpc_resp = &res,
2752 };
2753
0e574af1 2754 nfs_fattr_init(fattr);
7c513058 2755 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2756}
2757
2758static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2759{
2760 struct nfs4_exception exception = { };
2761 int err;
2762 do {
2763 err = nfs4_handle_exception(server,
2764 _nfs4_proc_getattr(server, fhandle, fattr),
2765 &exception);
2766 } while (exception.retry);
2767 return err;
2768}
2769
2770/*
2771 * The file is not closed if it is opened due to the a request to change
2772 * the size of the file. The open call will not be needed once the
2773 * VFS layer lookup-intents are implemented.
2774 *
2775 * Close is called when the inode is destroyed.
2776 * If we haven't opened the file for O_WRONLY, we
2777 * need to in the size_change case to obtain a stateid.
2778 *
2779 * Got race?
2780 * Because OPEN is always done by name in nfsv4, it is
2781 * possible that we opened a different file by the same
2782 * name. We can recognize this race condition, but we
2783 * can't do anything about it besides returning an error.
2784 *
2785 * This will be fixed with VFS changes (lookup-intent).
2786 */
2787static int
2788nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2789 struct iattr *sattr)
2790{
08e9eac4 2791 struct inode *inode = dentry->d_inode;
659bfcd6 2792 struct rpc_cred *cred = NULL;
d530838b 2793 struct nfs4_state *state = NULL;
1da177e4
LT		 2794 int status;
2795
8a1636c4 2796 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2797 pnfs_commit_and_return_layout(inode);
8a1636c4 2798
0e574af1 2799 nfs_fattr_init(fattr);
1da177e4 2800
2669940d
AA		 2801 /* Deal with open(O_TRUNC) */
2802 if (sattr->ia_valid & ATTR_OPEN)
2803 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2804
2805 /* Optimization: if the end result is no change, don't RPC */
2806 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2807 return 0;
2808
d530838b 2809 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2810 if (sattr->ia_valid & ATTR_FILE) {
2811 struct nfs_open_context *ctx;
2812
2813 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2814 if (ctx) {
2815 cred = ctx->cred;
2816 state = ctx->state;
2817 }
659bfcd6 2818 }
08e9eac4 2819
659bfcd6 2820 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2821 if (status == 0)
2822 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2823 return status;
2824}
2825
0c2e53f1
TM		 2826static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2827 const struct qstr *name, struct nfs_fh *fhandle,
2828 struct nfs_fattr *fattr)
2b3de441 2829{
0c2e53f1 2830 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2831 int status;
2832 struct nfs4_lookup_arg args = {
2833 .bitmask = server->attr_bitmask,
0c2e53f1 2834 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2835 .name = name,
2836 };
2837 struct nfs4_lookup_res res = {
2838 .server = server,
2839 .fattr = fattr,
2840 .fh = fhandle,
2841 };
2842 struct rpc_message msg = {
2843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2844 .rpc_argp = &args,
2845 .rpc_resp = &res,
2846 };
2847
2848 nfs_fattr_init(fattr);
2849
1da177e4 2850 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2851 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2852 dprintk("NFS reply lookup: %d\n", status);
2853 return status;
2854}
2855
72de53ec 2856static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2857{
7ebb9315 2858 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2859 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2860 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2861 fattr->nlink = 2;
2862}
2863
72de53ec
BS		 2864static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2865 struct qstr *name, struct nfs_fh *fhandle,
2866 struct nfs_fattr *fattr)
1da177e4
LT		 2867{
2868 struct nfs4_exception exception = { };
72de53ec 2869 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2870 int err;
2871 do {
72de53ec
BS		 2872 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2873 switch (err) {
08ef7bd3 2874 case -NFS4ERR_BADNAME:
72de53ec
BS		 2875 err = -ENOENT;
2876 goto out;
0c2e53f1 2877 case -NFS4ERR_MOVED:
f05d147f 2878 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2879 goto out;
0c2e53f1 2880 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2881 err = -EPERM;
2882 if (client != *clnt)
2883 goto out;
2884
2885 client = nfs4_create_sec_client(client, dir, name);
2886 if (IS_ERR(client))
2887 return PTR_ERR(client);
2888
2889 exception.retry = 1;
2890 break;
2891 default:
2892 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2893 }
1da177e4 2894 } while (exception.retry);
72de53ec
BS		 2895
2896out:
2897 if (err == 0)
2898 *clnt = client;
2899 else if (client != *clnt)
2900 rpc_shutdown_client(client);
2901
1da177e4
LT		 2902 return err;
2903}
2904
80a16b21 2905static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2906 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2907{
2908 int status;
2909 struct rpc_clnt *client = NFS_CLIENT(dir);
2910
2911 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2912 if (client != NFS_CLIENT(dir)) {
2913 rpc_shutdown_client(client);
2914 nfs_fixup_secinfo_attributes(fattr);
2915 }
2916 return status;
2917}
2918
f05d147f
BS		 2919struct rpc_clnt *
2920nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2921 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2922{
2923 int status;
2924 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2925
2926 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2927 if (status < 0) {
2928 rpc_shutdown_client(client);
2929 return ERR_PTR(status);
2930 }
2931 return client;
2932}
2933
1da177e4
LT		 2934static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2935{
76b32999 2936 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2937 struct nfs4_accessargs args = {
2938 .fh = NFS_FH(inode),
a4980e78 2939 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2940 };
2941 struct nfs4_accessres res = {
2942 .server = server,
1da177e4 2943 };
1da177e4
LT		 2944 struct rpc_message msg = {
2945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2946 .rpc_argp = &args,
2947 .rpc_resp = &res,
2948 .rpc_cred = entry->cred,
2949 };
2950 int mode = entry->mask;
2951 int status;
2952
2953 /*
2954 * Determine which access bits we want to ask for...
2955 */
2956 if (mode & MAY_READ)
2957 args.access |= NFS4_ACCESS_READ;
2958 if (S_ISDIR(inode->i_mode)) {
2959 if (mode & MAY_WRITE)
2960 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2961 if (mode & MAY_EXEC)
2962 args.access |= NFS4_ACCESS_LOOKUP;
2963 } else {
2964 if (mode & MAY_WRITE)
2965 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2966 if (mode & MAY_EXEC)
2967 args.access |= NFS4_ACCESS_EXECUTE;
2968 }
c407d41a
TM		 2969
2970 res.fattr = nfs_alloc_fattr();
2971 if (res.fattr == NULL)
2972 return -ENOMEM;
2973
7c513058 2974 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2975 if (!status) {
6168f62c 2976 nfs_access_set_mask(entry, res.access);
c407d41a 2977 nfs_refresh_inode(inode, res.fattr);
1da177e4 2978 }
c407d41a 2979 nfs_free_fattr(res.fattr);
1da177e4
LT		 2980 return status;
2981}
2982
2983static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2984{
2985 struct nfs4_exception exception = { };
2986 int err;
2987 do {
2988 err = nfs4_handle_exception(NFS_SERVER(inode),
2989 _nfs4_proc_access(inode, entry),
2990 &exception);
2991 } while (exception.retry);
2992 return err;
2993}
2994
2995/*
2996 * TODO: For the time being, we don't try to get any attributes
2997 * along with any of the zero-copy operations READ, READDIR,
2998 * READLINK, WRITE.
2999 *
3000 * In the case of the first three, we want to put the GETATTR
3001 * after the read-type operation -- this is because it is hard
3002 * to predict the length of a GETATTR response in v4, and thus
3003 * align the READ data correctly. This means that the GETATTR
3004 * may end up partially falling into the page cache, and we should
3005 * shift it into the 'tail' of the xdr_buf before processing.
3006 * To do this efficiently, we need to know the total length
3007 * of data received, which doesn't seem to be available outside
3008 * of the RPC layer.
3009 *
3010 * In the case of WRITE, we also want to put the GETATTR after
3011 * the operation -- in this case because we want to make sure
140150db 3012 * we get the post-operation mtime and size.
1da177e4
LT		 3013 *
3014 * Both of these changes to the XDR layer would in fact be quite
3015 * minor, but I decided to leave them for a subsequent patch.
3016 */
3017static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3018 unsigned int pgbase, unsigned int pglen)
3019{
3020 struct nfs4_readlink args = {
3021 .fh = NFS_FH(inode),
3022 .pgbase = pgbase,
3023 .pglen = pglen,
3024 .pages = &page,
3025 };
f50c7000 3026 struct nfs4_readlink_res res;
1da177e4
LT		 3027 struct rpc_message msg = {
3028 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3029 .rpc_argp = &args,
f50c7000 3030 .rpc_resp = &res,
1da177e4
LT		 3031 };
3032
7c513058 3033 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3034}
3035
3036static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3037 unsigned int pgbase, unsigned int pglen)
3038{
3039 struct nfs4_exception exception = { };
3040 int err;
3041 do {
3042 err = nfs4_handle_exception(NFS_SERVER(inode),
3043 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3044 &exception);
3045 } while (exception.retry);
3046 return err;
3047}
3048
1da177e4 3049/*
8867fe58 3050 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3051 */
1da177e4
LT		 3052static int
3053nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3054 int flags)
1da177e4 3055{
8867fe58 3056 struct nfs_open_context *ctx;
1da177e4 3057 struct nfs4_state *state;
1da177e4
LT		 3058 int status = 0;
3059
8867fe58
MS		 3060 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3061 if (IS_ERR(ctx))
3062 return PTR_ERR(ctx);
3063
a8a5da99 3064 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 3065 state = nfs4_do_open(dir, dentry, ctx->mode,
3066 flags, sattr, ctx->cred,
3067 &ctx->mdsthreshold);
d4d9cdcb 3068 d_drop(dentry);
1da177e4
LT		 3069 if (IS_ERR(state)) {
3070 status = PTR_ERR(state);
c0204fd2 3071 goto out;
1da177e4 3072 }
d4d9cdcb 3073 d_add(dentry, igrab(state->inode));
d75340cc 3074 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3075 ctx->state = state;
1da177e4 3076out:
8867fe58 3077 put_nfs_open_context(ctx);
1da177e4
LT		 3078 return status;
3079}
3080
3081static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3082{
16e42959 3083 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3084 struct nfs_removeargs args = {
1da177e4 3085 .fh = NFS_FH(dir),
26fe5750 3086 .name = *name,
16e42959 3087 };
4fdc17b2 3088 struct nfs_removeres res = {
16e42959 3089 .server = server,
1da177e4 3090 };
1da177e4 3091 struct rpc_message msg = {
4fdc17b2
TM		 3092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3093 .rpc_argp = &args,
3094 .rpc_resp = &res,
1da177e4 3095 };
778d2817 3096 int status;
1da177e4 3097
7c513058 3098 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3099 if (status == 0)
16e42959 3100 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3101 return status;
3102}
3103
3104static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3105{
3106 struct nfs4_exception exception = { };
3107 int err;
3108 do {
3109 err = nfs4_handle_exception(NFS_SERVER(dir),
3110 _nfs4_proc_remove(dir, name),
3111 &exception);
3112 } while (exception.retry);
3113 return err;
3114}
3115
e4eff1a6 3116static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3117{
e4eff1a6
TM		 3118 struct nfs_server *server = NFS_SERVER(dir);
3119 struct nfs_removeargs *args = msg->rpc_argp;
3120 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3121
e4eff1a6 3122 res->server = server;
1da177e4 3123 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3124 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3125}
3126
34e137cc
BS		 3127static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3128{
d9afbd1b
TM		 3129 nfs4_setup_sequence(NFS_SERVER(data->dir),
3130 &data->args.seq_args,
3131 &data->res.seq_res,
3132 task);
1da177e4
LT		 3133}
3134
e4eff1a6 3135static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3136{
e4eff1a6
TM		 3137 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3138
14516c3a
TM		 3139 if (!nfs4_sequence_done(task, &res->seq_res))
3140 return 0;
9e33bed5 3141 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3142 return 0;
3143 update_changeattr(dir, &res->cinfo);
e4eff1a6 3144 return 1;
1da177e4
LT		 3145}
3146
d3d4152a
JL		 3147static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3148{
3149 struct nfs_server *server = NFS_SERVER(dir);
3150 struct nfs_renameargs *arg = msg->rpc_argp;
3151 struct nfs_renameres *res = msg->rpc_resp;
3152
3153 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3154 res->server = server;
9d12b216 3155 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3156}
3157
c6bfa1a1
BS		 3158static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3159{
d9afbd1b
TM		 3160 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3161 &data->args.seq_args,
3162 &data->res.seq_res,
3163 task);
d3d4152a
JL		 3164}
3165
3166static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3167 struct inode *new_dir)
3168{
3169 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3170
3171 if (!nfs4_sequence_done(task, &res->seq_res))
3172 return 0;
3173 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3174 return 0;
3175
3176 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3177 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3178 return 1;
3179}
3180
1da177e4
LT		 3181static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3182 struct inode *new_dir, struct qstr *new_name)
3183{
6caf2c82 3184 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3185 struct nfs_renameargs arg = {
1da177e4
LT		 3186 .old_dir = NFS_FH(old_dir),
3187 .new_dir = NFS_FH(new_dir),
3188 .old_name = old_name,
3189 .new_name = new_name,
6caf2c82 3190 };
e8582a8b 3191 struct nfs_renameres res = {
6caf2c82 3192 .server = server,
1da177e4 3193 };
1da177e4
LT		 3194 struct rpc_message msg = {
3195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3196 .rpc_argp = &arg,
3197 .rpc_resp = &res,
3198 };
011fff72 3199 int status = -ENOMEM;
1da177e4 3200
7c513058 3201 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3202 if (!status) {
3203 update_changeattr(old_dir, &res.old_cinfo);
3204 update_changeattr(new_dir, &res.new_cinfo);
3205 }
3206 return status;
3207}
3208
3209static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3210 struct inode *new_dir, struct qstr *new_name)
3211{
3212 struct nfs4_exception exception = { };
3213 int err;
3214 do {
3215 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3216 _nfs4_proc_rename(old_dir, old_name,
3217 new_dir, new_name),
3218 &exception);
3219 } while (exception.retry);
3220 return err;
3221}
3222
3223static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3224{
91ba2eee 3225 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3226 struct nfs4_link_arg arg = {
3227 .fh = NFS_FH(inode),
3228 .dir_fh = NFS_FH(dir),
3229 .name = name,
91ba2eee
TM		 3230 .bitmask = server->attr_bitmask,
3231 };
91ba2eee
TM		 3232 struct nfs4_link_res res = {
3233 .server = server,
1da177e4 3234 };
1da177e4
LT		 3235 struct rpc_message msg = {
3236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3237 .rpc_argp = &arg,
91ba2eee 3238 .rpc_resp = &res,
1da177e4 3239 };
136f2627
TM		 3240 int status = -ENOMEM;
3241
3242 res.fattr = nfs_alloc_fattr();
778d2817 3243 if (res.fattr == NULL)
136f2627 3244 goto out;
1da177e4 3245
7c513058 3246 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3247 if (!status) {
3248 update_changeattr(dir, &res.cinfo);
73a3d07c 3249 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3250 }
136f2627 3251out:
136f2627 3252 nfs_free_fattr(res.fattr);
1da177e4
LT		 3253 return status;
3254}
3255
3256static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3257{
3258 struct nfs4_exception exception = { };
3259 int err;
3260 do {
3261 err = nfs4_handle_exception(NFS_SERVER(inode),
3262 _nfs4_proc_link(inode, dir, name),
3263 &exception);
3264 } while (exception.retry);
3265 return err;
3266}
3267
57dc9a57
TM		 3268struct nfs4_createdata {
3269 struct rpc_message msg;
3270 struct nfs4_create_arg arg;
3271 struct nfs4_create_res res;
3272 struct nfs_fh fh;
3273 struct nfs_fattr fattr;
57dc9a57
TM		 3274};
3275
3276static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3277 struct qstr *name, struct iattr *sattr, u32 ftype)
3278{
3279 struct nfs4_createdata *data;
3280
3281 data = kzalloc(sizeof(*data), GFP_KERNEL);
3282 if (data != NULL) {
3283 struct nfs_server *server = NFS_SERVER(dir);
3284
3285 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3286 data->msg.rpc_argp = &data->arg;
3287 data->msg.rpc_resp = &data->res;
3288 data->arg.dir_fh = NFS_FH(dir);
3289 data->arg.server = server;
3290 data->arg.name = name;
3291 data->arg.attrs = sattr;
3292 data->arg.ftype = ftype;
3293 data->arg.bitmask = server->attr_bitmask;
3294 data->res.server = server;
3295 data->res.fh = &data->fh;
3296 data->res.fattr = &data->fattr;
57dc9a57 3297 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3298 }
3299 return data;
3300}
3301
3302static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3303{
7c513058 3304 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3305 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3306 if (status == 0) {
3307 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3308 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3309 }
3310 return status;
3311}
3312
3313static void nfs4_free_createdata(struct nfs4_createdata *data)
3314{
3315 kfree(data);
3316}
3317
4f390c15 3318static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3319 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3320{
57dc9a57
TM		 3321 struct nfs4_createdata *data;
3322 int status = -ENAMETOOLONG;
1da177e4 3323
94a6d753 3324 if (len > NFS4_MAXPATHLEN)
57dc9a57 3325 goto out;
4f390c15 3326
57dc9a57
TM		 3327 status = -ENOMEM;
3328 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3329 if (data == NULL)
3330 goto out;
3331
3332 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3333 data->arg.u.symlink.pages = &page;
3334 data->arg.u.symlink.len = len;
1da177e4 3335
57dc9a57
TM		 3336 status = nfs4_do_create(dir, dentry, data);
3337
3338 nfs4_free_createdata(data);
3339out:
1da177e4
LT		 3340 return status;
3341}
3342
4f390c15 3343static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3344 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3345{
3346 struct nfs4_exception exception = { };
3347 int err;
3348 do {
3349 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3350 _nfs4_proc_symlink(dir, dentry, page,
3351 len, sattr),
1da177e4
LT		 3352 &exception);
3353 } while (exception.retry);
3354 return err;
3355}
3356
3357static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3358 struct iattr *sattr)
3359{
57dc9a57
TM		 3360 struct nfs4_createdata *data;
3361 int status = -ENOMEM;
1da177e4 3362
57dc9a57
TM		 3363 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3364 if (data == NULL)
3365 goto out;
3366
3367 status = nfs4_do_create(dir, dentry, data);
3368
3369 nfs4_free_createdata(data);
3370out:
1da177e4
LT		 3371 return status;
3372}
3373
3374static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3375 struct iattr *sattr)
3376{
3377 struct nfs4_exception exception = { };
3378 int err;
a8a5da99
AK		 3379
3380 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3381 do {
3382 err = nfs4_handle_exception(NFS_SERVER(dir),
3383 _nfs4_proc_mkdir(dir, dentry, sattr),
3384 &exception);
3385 } while (exception.retry);
3386 return err;
3387}
3388
3389static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3390 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3391{
3392 struct inode *dir = dentry->d_inode;
3393 struct nfs4_readdir_arg args = {
3394 .fh = NFS_FH(dir),
56e4ebf8 3395 .pages = pages,
1da177e4
LT		 3396 .pgbase = 0,
3397 .count = count,
96d25e53 3398 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3399 .plus = plus,
1da177e4
LT		 3400 };
3401 struct nfs4_readdir_res res;
3402 struct rpc_message msg = {
3403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3404 .rpc_argp = &args,
3405 .rpc_resp = &res,
3406 .rpc_cred = cred,
3407 };
3408 int status;
3409
3110ff80 3410 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3411 dentry->d_parent->d_name.name,
3412 dentry->d_name.name,
3413 (unsigned long long)cookie);
c3f52af3 3414 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3415 res.pgbase = args.pgbase;
7c513058 3416 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3417 if (status >= 0) {
c3f52af3 3418 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3419 status += args.pgbase;
3420 }
c4812998
TM		 3421
3422 nfs_invalidate_atime(dir);
3423
3110ff80 3424 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3425 return status;
3426}
3427
3428static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3429 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3430{
3431 struct nfs4_exception exception = { };
3432 int err;
3433 do {
3434 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3435 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3436 pages, count, plus),
1da177e4
LT		 3437 &exception);
3438 } while (exception.retry);
3439 return err;
3440}
3441
3442static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3443 struct iattr *sattr, dev_t rdev)
3444{
57dc9a57
TM		 3445 struct nfs4_createdata *data;
3446 int mode = sattr->ia_mode;
3447 int status = -ENOMEM;
1da177e4 3448
57dc9a57
TM		 3449 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3450 if (data == NULL)
3451 goto out;
3452
1da177e4 3453 if (S_ISFIFO(mode))
57dc9a57 3454 data->arg.ftype = NF4FIFO;
1da177e4 3455 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3456 data->arg.ftype = NF4BLK;
3457 data->arg.u.device.specdata1 = MAJOR(rdev);
3458 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3459 }
3460 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3461 data->arg.ftype = NF4CHR;
3462 data->arg.u.device.specdata1 = MAJOR(rdev);
3463 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3464 } else if (!S_ISSOCK(mode)) {
3465 status = -EINVAL;
3466 goto out_free;
1da177e4 3467 }
1da177e4 3468
57dc9a57 3469 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3470out_free:
57dc9a57
TM		 3471 nfs4_free_createdata(data);
3472out:
1da177e4
LT		 3473 return status;
3474}
3475
3476static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3477 struct iattr *sattr, dev_t rdev)
3478{
3479 struct nfs4_exception exception = { };
3480 int err;
a8a5da99
AK		 3481
3482 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3483 do {
3484 err = nfs4_handle_exception(NFS_SERVER(dir),
3485 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3486 &exception);
3487 } while (exception.retry);
3488 return err;
3489}
3490
3491static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3492 struct nfs_fsstat *fsstat)
3493{
3494 struct nfs4_statfs_arg args = {
3495 .fh = fhandle,
3496 .bitmask = server->attr_bitmask,
3497 };
24ad148a
BH		 3498 struct nfs4_statfs_res res = {
3499 .fsstat = fsstat,
3500 };
1da177e4
LT		 3501 struct rpc_message msg = {
3502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3503 .rpc_argp = &args,
24ad148a 3504 .rpc_resp = &res,
1da177e4
LT		 3505 };
3506
0e574af1 3507 nfs_fattr_init(fsstat->fattr);
7c513058 3508 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3509}
3510
3511static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3512{
3513 struct nfs4_exception exception = { };
3514 int err;
3515 do {
3516 err = nfs4_handle_exception(server,
3517 _nfs4_proc_statfs(server, fhandle, fsstat),
3518 &exception);
3519 } while (exception.retry);
3520 return err;
3521}
3522
3523static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3524 struct nfs_fsinfo *fsinfo)
3525{
3526 struct nfs4_fsinfo_arg args = {
3527 .fh = fhandle,
3528 .bitmask = server->attr_bitmask,
3529 };
3dda5e43
BH		 3530 struct nfs4_fsinfo_res res = {
3531 .fsinfo = fsinfo,
3532 };
1da177e4
LT		 3533 struct rpc_message msg = {
3534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3535 .rpc_argp = &args,
3dda5e43 3536 .rpc_resp = &res,
1da177e4
LT		 3537 };
3538
7c513058 3539 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3540}
3541
3542static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3543{
3544 struct nfs4_exception exception = { };
83ca7f5a 3545 unsigned long now = jiffies;
1da177e4
LT		 3546 int err;
3547
3548 do {
83ca7f5a
CL		 3549 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3550 if (err == 0) {
3551 struct nfs_client *clp = server->nfs_client;
3552
3553 spin_lock(&clp->cl_lock);
3554 clp->cl_lease_time = fsinfo->lease_time * HZ;
3555 clp->cl_last_renewal = now;
3556 spin_unlock(&clp->cl_lock);
3557 break;
3558 }
3559 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3560 } while (exception.retry);
3561 return err;
3562}
3563
3564static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3565{
e38eb650
BS		 3566 int error;
3567
0e574af1 3568 nfs_fattr_init(fsinfo->fattr);
e38eb650 3569 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3570 if (error == 0) {
3571 /* block layout checks this! */
3572 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3573 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3574 }
e38eb650
BS		 3575
3576 return error;
1da177e4
LT		 3577}
3578
3579static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3580 struct nfs_pathconf *pathconf)
3581{
3582 struct nfs4_pathconf_arg args = {
3583 .fh = fhandle,
3584 .bitmask = server->attr_bitmask,
3585 };
d45b2989
BH		 3586 struct nfs4_pathconf_res res = {
3587 .pathconf = pathconf,
3588 };
1da177e4
LT		 3589 struct rpc_message msg = {
3590 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3591 .rpc_argp = &args,
d45b2989 3592 .rpc_resp = &res,
1da177e4
LT		 3593 };
3594
3595 /* None of the pathconf attributes are mandatory to implement */
3596 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3597 memset(pathconf, 0, sizeof(*pathconf));
3598 return 0;
3599 }
3600
0e574af1 3601 nfs_fattr_init(pathconf->fattr);
7c513058 3602 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3603}
3604
3605static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3606 struct nfs_pathconf *pathconf)
3607{
3608 struct nfs4_exception exception = { };
3609 int err;
3610
3611 do {
3612 err = nfs4_handle_exception(server,
3613 _nfs4_proc_pathconf(server, fhandle, pathconf),
3614 &exception);
3615 } while (exception.retry);
3616 return err;
3617}
3618
5521abfd 3619int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3620 const struct nfs_open_context *ctx,
3621 const struct nfs_lock_context *l_ctx,
3622 fmode_t fmode)
3623{
3624 const struct nfs_lockowner *lockowner = NULL;
3625
3626 if (l_ctx != NULL)
3627 lockowner = &l_ctx->lockowner;
5521abfd 3628 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3629}
3630EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3631
5521abfd
TM		 3632static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3633 const struct nfs_open_context *ctx,
3634 const struct nfs_lock_context *l_ctx,
3635 fmode_t fmode)
3636{
3637 nfs4_stateid current_stateid;
3638
c8dd8fdf
TM		 3639 /* If the current stateid represents a lost lock, then exit */
3640 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
3641 return true;
5521abfd
TM		 3642 return nfs4_stateid_match(stateid, &current_stateid);
3643}
3644
3645static bool nfs4_error_stateid_expired(int err)
3646{
3647 switch (err) {
3648 case -NFS4ERR_DELEG_REVOKED:
3649 case -NFS4ERR_ADMIN_REVOKED:
3650 case -NFS4ERR_BAD_STATEID:
3651 case -NFS4ERR_STALE_STATEID:
3652 case -NFS4ERR_OLD_STATEID:
3653 case -NFS4ERR_OPENMODE:
3654 case -NFS4ERR_EXPIRED:
3655 return true;
3656 }
3657 return false;
3658}
3659
d20581aa
BH		 3660void __nfs4_read_done_cb(struct nfs_read_data *data)
3661{
cd841605 3662 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3663}
3664
cbdabc7f 3665static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3666{
cd841605 3667 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3668
9e33bed5 3669 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3670 rpc_restart_call_prepare(task);
ec06c096 3671 return -EAGAIN;
1da177e4 3672 }
8850df99 3673
d20581aa 3674 __nfs4_read_done_cb(data);
1da177e4 3675 if (task->tk_status > 0)
ec06c096
TM		 3676 renew_lease(server, data->timestamp);
3677 return 0;
1da177e4
LT		 3678}
3679
5521abfd
TM		 3680static bool nfs4_read_stateid_changed(struct rpc_task *task,
3681 struct nfs_readargs *args)
3682{
3683
3684 if (!nfs4_error_stateid_expired(task->tk_status) ||
3685 nfs4_stateid_is_current(&args->stateid,
3686 args->context,
3687 args->lock_context,
3688 FMODE_READ))
3689 return false;
3690 rpc_restart_call_prepare(task);
3691 return true;
3692}
3693
cbdabc7f
AA		 3694static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3695{
3696
3697 dprintk("--> %s\n", __func__);
3698
3699 if (!nfs4_sequence_done(task, &data->res.seq_res))
3700 return -EAGAIN;
5521abfd
TM		 3701 if (nfs4_read_stateid_changed(task, &data->args))
3702 return -EAGAIN;
d20581aa
BH		 3703 return data->read_done_cb ? data->read_done_cb(task, data) :
3704 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3705}
3706
bdc7f021 3707static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3708{
1da177e4 3709 data->timestamp = jiffies;
cbdabc7f 3710 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3711 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3712 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3713}
3714
ea7c3303
BS		 3715static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3716{
9b206149 3717 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3718 &data->args.seq_args,
3719 &data->res.seq_res,
9b206149
TM		 3720 task))
3721 return;
3722 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3723 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3724}
3725
b029bc9b 3726static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3727{
cd841605 3728 struct inode *inode = data->header->inode;
1da177e4 3729
9e33bed5 3730 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3731 rpc_restart_call_prepare(task);
788e7a89 3732 return -EAGAIN;
1da177e4 3733 }
4f9838c7 3734 if (task->tk_status >= 0) {
1da177e4 3735 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3736 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3737 }
788e7a89 3738 return 0;
1da177e4
LT		 3739}
3740
5521abfd
TM		 3741static bool nfs4_write_stateid_changed(struct rpc_task *task,
3742 struct nfs_writeargs *args)
3743{
3744
3745 if (!nfs4_error_stateid_expired(task->tk_status) ||
3746 nfs4_stateid_is_current(&args->stateid,
3747 args->context,
3748 args->lock_context,
3749 FMODE_WRITE))
3750 return false;
3751 rpc_restart_call_prepare(task);
3752 return true;
3753}
3754
b029bc9b
FI		 3755static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3756{
3757 if (!nfs4_sequence_done(task, &data->res.seq_res))
3758 return -EAGAIN;
5521abfd
TM		 3759 if (nfs4_write_stateid_changed(task, &data->args))
3760 return -EAGAIN;
d20581aa
BH		 3761 return data->write_done_cb ? data->write_done_cb(task, data) :
3762 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3763}
3764
5a37f851
TM		 3765static
3766bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3767{
5a37f851
TM		 3768 const struct nfs_pgio_header *hdr = data->header;
3769
3770 /* Don't request attributes for pNFS or O_DIRECT writes */
3771 if (data->ds_clp != NULL || hdr->dreq != NULL)
3772 return false;
3773 /* Otherwise, request attributes if and only if we don't hold
3774 * a delegation
3775 */
011e2a7f 3776 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3777}
a69aef14 3778
bdc7f021 3779static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3780{
cd841605 3781 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3782
5a37f851 3783 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3784 data->args.bitmask = NULL;
3785 data->res.fattr = NULL;
3786 } else
3787 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3788
b029bc9b
FI		 3789 if (!data->write_done_cb)
3790 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3791 data->res.server = server;
1da177e4
LT		 3792 data->timestamp = jiffies;
3793
bdc7f021 3794 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3795 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3796}
3797
c6cb80d0
BS		 3798static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3799{
9b206149 3800 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3801 &data->args.seq_args,
3802 &data->res.seq_res,
9b206149
TM		 3803 task))
3804 return;
3805 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3806 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3807}
3808
0b7c0153 3809static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3810{
d9afbd1b
TM		 3811 nfs4_setup_sequence(NFS_SERVER(data->inode),
3812 &data->args.seq_args,
3813 &data->res.seq_res,
3814 task);
1da177e4
LT		 3815}
3816
0b7c0153 3817static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3818{
1da177e4 3819 struct inode *inode = data->inode;
14516c3a 3820
9e33bed5 3821 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3822 rpc_restart_call_prepare(task);
788e7a89 3823 return -EAGAIN;
1da177e4 3824 }
788e7a89 3825 return 0;
1da177e4
LT		 3826}
3827
0b7c0153 3828static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3829{
3830 if (!nfs4_sequence_done(task, &data->res.seq_res))
3831 return -EAGAIN;
0b7c0153 3832 return data->commit_done_cb(task, data);
5f452431
FI		 3833}
3834
0b7c0153 3835static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3836{
788e7a89 3837 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3838
0b7c0153
FI		 3839 if (data->commit_done_cb == NULL)
3840 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3841 data->res.server = server;
bdc7f021 3842 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3843 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3844}
3845
9bc4e3ca
CL		 3846struct nfs4_renewdata {
3847 struct nfs_client *client;
3848 unsigned long timestamp;
3849};
3850
1da177e4
LT		 3851/*
3852 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3853 * standalone procedure for queueing an asynchronous RENEW.
3854 */
9bc4e3ca 3855static void nfs4_renew_release(void *calldata)
dc96aef9 3856{
9bc4e3ca
CL		 3857 struct nfs4_renewdata *data = calldata;
3858 struct nfs_client *clp = data->client;
dc96aef9 3859
0851de06
AB		 3860 if (atomic_read(&clp->cl_count) > 1)
3861 nfs4_schedule_state_renewal(clp);
3862 nfs_put_client(clp);
9bc4e3ca 3863 kfree(data);
dc96aef9
AB		 3864}
3865
9bc4e3ca 3866static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3867{
9bc4e3ca
CL		 3868 struct nfs4_renewdata *data = calldata;
3869 struct nfs_client *clp = data->client;
3870 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3871
3872 if (task->tk_status < 0) {
95baa25c 3873 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3874 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3875 return;
3876 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3877 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3878 return;
3879 }
3880 nfs4_schedule_path_down_recovery(clp);
1da177e4 3881 }
452e9352 3882 do_renew_lease(clp, timestamp);
1da177e4
LT		 3883}
3884
963d8fe5
TM		 3885static const struct rpc_call_ops nfs4_renew_ops = {
3886 .rpc_call_done = nfs4_renew_done,
dc96aef9 3887 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3888};
3889
2f60ea6b 3890static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
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 3896 };
9bc4e3ca 3897 struct nfs4_renewdata *data;
1da177e4 3898
2f60ea6b
TM		 3899 if (renew_flags == 0)
3900 return 0;
0851de06
AB		 3901 if (!atomic_inc_not_zero(&clp->cl_count))
3902 return -EIO;
b569ad34 3903 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3904 if (data == NULL)
3905 return -ENOMEM;
3906 data->client = clp;
3907 data->timestamp = jiffies;
bc7a05ca 3908 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3909 &nfs4_renew_ops, data);
1da177e4
LT		 3910}
3911
8534d4ec 3912static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3913{
3914 struct rpc_message msg = {
3915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3916 .rpc_argp = clp,
b4454fe1 3917 .rpc_cred = cred,
1da177e4
LT		 3918 };
3919 unsigned long now = jiffies;
3920 int status;
3921
bc7a05ca 3922 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3923 if (status < 0)
3924 return status;
452e9352 3925 do_renew_lease(clp, now);
1da177e4
LT		 3926 return 0;
3927}
3928
aa1870af
BF		 3929static inline int nfs4_server_supports_acls(struct nfs_server *server)
3930{
3931 return (server->caps & NFS_CAP_ACLS)
3932 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3933 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3934}
3935
21f498c2
TM		 3936/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3937 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3938 * the stack.
3939 */
21f498c2 3940#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3941
e9e3d724
NH		 3942static int buf_to_pages_noslab(const void *buf, size_t buflen,
3943 struct page **pages, unsigned int *pgbase)
3944{
3945 struct page *newpage, **spages;
3946 int rc = 0;
3947 size_t len;
3948 spages = pages;
3949
3950 do {
21f498c2 3951 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3952 newpage = alloc_page(GFP_KERNEL);
3953
3954 if (newpage == NULL)
3955 goto unwind;
3956 memcpy(page_address(newpage), buf, len);
3957 buf += len;
3958 buflen -= len;
3959 *pages++ = newpage;
3960 rc++;
3961 } while (buflen != 0);
3962
3963 return rc;
3964
3965unwind:
3966 for(; rc > 0; rc--)
3967 __free_page(spages[rc-1]);
3968 return -ENOMEM;
3969}
3970
e50a1c2e
BF		 3971struct nfs4_cached_acl {
3972 int cached;
3973 size_t len;
3e9d4154 3974 char data[0];
e50a1c2e
BF		 3975};
3976
3977static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3978{
3979 struct nfs_inode *nfsi = NFS_I(inode);
3980
3981 spin_lock(&inode->i_lock);
3982 kfree(nfsi->nfs4_acl);
3983 nfsi->nfs4_acl = acl;
3984 spin_unlock(&inode->i_lock);
3985}
3986
3987static void nfs4_zap_acl_attr(struct inode *inode)
3988{
3989 nfs4_set_cached_acl(inode, NULL);
3990}
3991
3992static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3993{
3994 struct nfs_inode *nfsi = NFS_I(inode);
3995 struct nfs4_cached_acl *acl;
3996 int ret = -ENOENT;
3997
3998 spin_lock(&inode->i_lock);
3999 acl = nfsi->nfs4_acl;
4000 if (acl == NULL)
4001 goto out;
4002 if (buf == NULL) /* user is just asking for length */
4003 goto out_len;
4004 if (acl->cached == 0)
4005 goto out;
4006 ret = -ERANGE; /* see getxattr(2) man page */
4007 if (acl->len > buflen)
4008 goto out;
4009 memcpy(buf, acl->data, acl->len);
4010out_len:
4011 ret = acl->len;
4012out:
4013 spin_unlock(&inode->i_lock);
4014 return ret;
4015}
4016
5794d21e 4017static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4018{
4019 struct nfs4_cached_acl *acl;
b291f1b1 4020 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4021
1f1ea6c2 4022 if (buflen <= PAGE_SIZE) {
b291f1b1 4023 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4024 if (acl == NULL)
4025 goto out;
4026 acl->cached = 1;
5794d21e 4027 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4028 } else {
4029 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4030 if (acl == NULL)
4031 goto out;
4032 acl->cached = 0;
4033 }
4034 acl->len = acl_len;
4035out:
4036 nfs4_set_cached_acl(inode, acl);
4037}
4038
bf118a34
AA		 4039/*
4040 * The getxattr API returns the required buffer length when called with a
4041 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4042 * the required buf. On a NULL buf, we send a page of data to the server
4043 * guessing that the ACL request can be serviced by a page. If so, we cache
4044 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4045 * the cache. If not so, we throw away the page, and cache the required
4046 * length. The next getxattr call will then produce another round trip to
4047 * the server, this time with the input buf of the required size.
4048 */
16b4289c 4049static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4050{
bf118a34 4051 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4052 struct nfs_getaclargs args = {
4053 .fh = NFS_FH(inode),
4054 .acl_pages = pages,
4055 .acl_len = buflen,
4056 };
663c79b3
BH		 4057 struct nfs_getaclres res = {
4058 .acl_len = buflen,
4059 };
aa1870af
BF		 4060 struct rpc_message msg = {
4061 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4062 .rpc_argp = &args,
663c79b3 4063 .rpc_resp = &res,
aa1870af 4064 };
21f498c2
TM		 4065 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4066 int ret = -ENOMEM, i;
aa1870af 4067
bf118a34
AA		 4068 /* As long as we're doing a round trip to the server anyway,
4069 * let's be prepared for a page of acl data. */
4070 if (npages == 0)
4071 npages = 1;
21f498c2
TM		 4072 if (npages > ARRAY_SIZE(pages))
4073 return -ERANGE;
5a006899 4074
bf118a34
AA		 4075 for (i = 0; i < npages; i++) {
4076 pages[i] = alloc_page(GFP_KERNEL);
4077 if (!pages[i])
4078 goto out_free;
e50a1c2e 4079 }
5a006899
SP		 4080
4081 /* for decoding across pages */
4082 res.acl_scratch = alloc_page(GFP_KERNEL);
4083 if (!res.acl_scratch)
4084 goto out_free;
4085
bf118a34
AA		 4086 args.acl_len = npages * PAGE_SIZE;
4087 args.acl_pgbase = 0;
5a006899 4088
de040bec 4089 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4090 __func__, buf, buflen, npages, args.acl_len);
4091 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4092 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4093 if (ret)
4094 goto out_free;
bf118a34 4095
1f1ea6c2
TM		 4096 /* Handle the case where the passed-in buffer is too short */
4097 if (res.acl_flags & NFS4_ACL_TRUNC) {
4098 /* Did the user only issue a request for the acl length? */
4099 if (buf == NULL)
4100 goto out_ok;
e50a1c2e 4101 ret = -ERANGE;
1f1ea6c2 4102 goto out_free;
e50a1c2e 4103 }
1f1ea6c2 4104 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4105 if (buf) {
4106 if (res.acl_len > buflen) {
4107 ret = -ERANGE;
4108 goto out_free;
4109 }
1f1ea6c2 4110 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4111 }
1f1ea6c2
TM		 4112out_ok:
4113 ret = res.acl_len;
e50a1c2e 4114out_free:
bf118a34
AA		 4115 for (i = 0; i < npages; i++)
4116 if (pages[i])
4117 __free_page(pages[i]);
331818f1
TM		 4118 if (res.acl_scratch)
4119 __free_page(res.acl_scratch);
aa1870af
BF		 4120 return ret;
4121}
4122
16b4289c
TM		 4123static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4124{
4125 struct nfs4_exception exception = { };
4126 ssize_t ret;
4127 do {
4128 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4129 if (ret >= 0)
4130 break;
4131 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4132 } while (exception.retry);
4133 return ret;
4134}
4135
e50a1c2e
BF		 4136static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4137{
4138 struct nfs_server *server = NFS_SERVER(inode);
4139 int ret;
4140
4141 if (!nfs4_server_supports_acls(server))
4142 return -EOPNOTSUPP;
4143 ret = nfs_revalidate_inode(server, inode);
4144 if (ret < 0)
4145 return ret;
08a22b39
AK		 4146 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4147 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4148 ret = nfs4_read_cached_acl(inode, buf, buflen);
4149 if (ret != -ENOENT)
bf118a34
AA		 4150 /* -ENOENT is returned if there is no ACL or if there is an ACL
4151 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4152 return ret;
4153 return nfs4_get_acl_uncached(inode, buf, buflen);
4154}
4155
16b4289c 4156static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4157{
4158 struct nfs_server *server = NFS_SERVER(inode);
4159 struct page *pages[NFS4ACL_MAXPAGES];
4160 struct nfs_setaclargs arg = {
4161 .fh = NFS_FH(inode),
4162 .acl_pages = pages,
4163 .acl_len = buflen,
4164 };
73c403a9 4165 struct nfs_setaclres res;
4b580ee3
BF		 4166 struct rpc_message msg = {
4167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4168 .rpc_argp = &arg,
73c403a9 4169 .rpc_resp = &res,
4b580ee3 4170 };
21f498c2 4171 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4172 int ret, i;
4b580ee3
BF		 4173
4174 if (!nfs4_server_supports_acls(server))
4175 return -EOPNOTSUPP;
21f498c2
TM		 4176 if (npages > ARRAY_SIZE(pages))
4177 return -ERANGE;
e9e3d724
NH		 4178 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4179 if (i < 0)
4180 return i;
57ec14c5 4181 nfs4_inode_return_delegation(inode);
7c513058 4182 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4183
4184 /*
4185 * Free each page after tx, so the only ref left is
4186 * held by the network stack
4187 */
4188 for (; i > 0; i--)
4189 put_page(pages[i-1]);
4190
08a22b39
AK		 4191 /*
4192 * Acl update can result in inode attribute update.
4193 * so mark the attribute cache invalid.
4194 */
4195 spin_lock(&inode->i_lock);
4196 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4197 spin_unlock(&inode->i_lock);
f41f7418
TM		 4198 nfs_access_zap_cache(inode);
4199 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4200 return ret;
4201}
4202
16b4289c
TM		 4203static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4204{
4205 struct nfs4_exception exception = { };
4206 int err;
4207 do {
4208 err = nfs4_handle_exception(NFS_SERVER(inode),
4209 __nfs4_proc_set_acl(inode, buf, buflen),
4210 &exception);
4211 } while (exception.retry);
4212 return err;
4213}
4214
1da177e4 4215static int
aa5190d0 4216nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4217{
aa5190d0
TM		 4218 struct nfs_client *clp = server->nfs_client;
4219
4220 if (task->tk_status >= 0)
1da177e4
LT		 4221 return 0;
4222 switch(task->tk_status) {
a1d0b5ee 4223 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4224 case -NFS4ERR_ADMIN_REVOKED:
4225 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4226 if (state == NULL)
4227 break;
4228 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4229 case -NFS4ERR_OPENMODE:
4230 if (state == NULL)
4231 break;
5d422301
TM		 4232 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4233 goto stateid_invalid;
0400a6b0 4234 goto wait_on_recovery;
0ced63d1 4235 case -NFS4ERR_EXPIRED:
5d422301
TM		 4236 if (state != NULL) {
4237 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4238 goto stateid_invalid;
4239 }
1da177e4 4240 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4241 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4242 nfs4_schedule_lease_recovery(clp);
4243 goto wait_on_recovery;
4745e315
AA		 4244#if defined(CONFIG_NFS_V4_1)
4245 case -NFS4ERR_BADSESSION:
4246 case -NFS4ERR_BADSLOT:
4247 case -NFS4ERR_BAD_HIGH_SLOT:
4248 case -NFS4ERR_DEADSESSION:
4249 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4250 case -NFS4ERR_SEQ_FALSE_RETRY:
4251 case -NFS4ERR_SEQ_MISORDERED:
4252 dprintk("%s ERROR %d, Reset session\n", __func__,
4253 task->tk_status);
9f594791 4254 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
39be1c3d 4255 goto wait_on_recovery;
4745e315 4256#endif /* CONFIG_NFS_V4_1 */
1da177e4 4257 case -NFS4ERR_DELAY:
aa5190d0 4258 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4259 case -NFS4ERR_GRACE:
1da177e4
LT		 4260 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4261 task->tk_status = 0;
4262 return -EAGAIN;
a8a4ae3a 4263 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4264 case -NFS4ERR_OLD_STATEID:
4265 task->tk_status = 0;
4266 return -EAGAIN;
4267 }
4268 task->tk_status = nfs4_map_errors(task->tk_status);
4269 return 0;
5d422301
TM		 4270stateid_invalid:
4271 task->tk_status = -EIO;
4272 return 0;
0400a6b0 4273wait_on_recovery:
a2c0b9e2 4274 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4275 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4276 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4277 task->tk_status = 0;
4278 return -EAGAIN;
1da177e4
LT		 4279}
4280
f092075d
CL		 4281static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4282 nfs4_verifier *bootverf)
cd93710e
CL		 4283{
4284 __be32 verf[2];
4285
2c820d9a
CL		 4286 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4287 /* An impossible timestamp guarantees this value
4288 * will never match a generated boot time. */
4289 verf[0] = 0;
4290 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4291 } else {
f092075d
CL		 4292 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4293 verf[0] = (__be32)nn->boot_time.tv_sec;
4294 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4295 }
cd93710e
CL		 4296 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4297}
4298
e984a55a
CL		 4299static unsigned int
4300nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4301 char *buf, size_t len)
4302{
4303 unsigned int result;
4304
4305 rcu_read_lock();
4306 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4307 clp->cl_ipaddr,
4308 rpc_peeraddr2str(clp->cl_rpcclient,
4309 RPC_DISPLAY_ADDR),
4310 rpc_peeraddr2str(clp->cl_rpcclient,
4311 RPC_DISPLAY_PROTO));
4312 rcu_read_unlock();
4313 return result;
4314}
4315
4316static unsigned int
4317nfs4_init_uniform_client_string(const struct nfs_client *clp,
4318 char *buf, size_t len)
4319{
6f2ea7f2
CL		 4320 char *nodename = clp->cl_rpcclient->cl_nodename;
4321
4322 if (nfs4_client_id_uniquifier[0] != '\0')
4323 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4324 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4325 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4326 nodename);
e984a55a
CL		 4327}
4328
6bbb4ae8
CL		 4329/**
4330 * nfs4_proc_setclientid - Negotiate client ID
4331 * @clp: state data structure
4332 * @program: RPC program for NFSv4 callback service
4333 * @port: IP port number for NFS4 callback service
4334 * @cred: RPC credential to use for this call
4335 * @res: where to place the result
4336 *
4337 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4338 */
bb8b27e5
TM		 4339int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4340 unsigned short port, struct rpc_cred *cred,
4341 struct nfs4_setclientid_res *res)
1da177e4
LT		 4342{
4343 nfs4_verifier sc_verifier;
4344 struct nfs4_setclientid setclientid = {
4345 .sc_verifier = &sc_verifier,
4346 .sc_prog = program,
f4eecd5d 4347 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4348 };
4349 struct rpc_message msg = {
4350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4351 .rpc_argp = &setclientid,
bb8b27e5 4352 .rpc_resp = res,
286d7d6a 4353 .rpc_cred = cred,
1da177e4 4354 };
6bbb4ae8 4355 int status;
1da177e4 4356
de734831 4357 /* nfs_client_id4 */
f092075d 4358 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4359 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4360 setclientid.sc_name_len =
4361 nfs4_init_uniform_client_string(clp,
4362 setclientid.sc_name,
4363 sizeof(setclientid.sc_name));
4364 else
4365 setclientid.sc_name_len =
4366 nfs4_init_nonuniform_client_string(clp,
4367 setclientid.sc_name,
4368 sizeof(setclientid.sc_name));
de734831 4369 /* cb_client4 */
e984a55a 4370 rcu_read_lock();
de734831 4371 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4372 sizeof(setclientid.sc_netid),
4373 rpc_peeraddr2str(clp->cl_rpcclient,
4374 RPC_DISPLAY_NETID));
de734831
CL		 4375 rcu_read_unlock();
4376 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4377 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4378 clp->cl_ipaddr, port >> 8, port & 255);
4379
6bbb4ae8
CL		 4380 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4381 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4382 setclientid.sc_name_len, setclientid.sc_name);
4383 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4384 dprintk("NFS reply setclientid: %d\n", status);
4385 return status;
1da177e4
LT		 4386}
4387
6bbb4ae8
CL		 4388/**
4389 * nfs4_proc_setclientid_confirm - Confirm client ID
4390 * @clp: state data structure
4391 * @res: result of a previous SETCLIENTID
4392 * @cred: RPC credential to use for this call
4393 *
4394 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4395 */
fd954ae1 4396int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4397 struct nfs4_setclientid_res *arg,
4398 struct rpc_cred *cred)
1da177e4 4399{
1da177e4
LT		 4400 struct rpc_message msg = {
4401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4402 .rpc_argp = arg,
286d7d6a 4403 .rpc_cred = cred,
1da177e4 4404 };
1da177e4
LT		 4405 int status;
4406
6bbb4ae8
CL		 4407 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4408 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4409 clp->cl_clientid);
1bd714f2 4410 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4411 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4412 return status;
4413}
4414
fe650407
TM		 4415struct nfs4_delegreturndata {
4416 struct nfs4_delegreturnargs args;
fa178f29 4417 struct nfs4_delegreturnres res;
fe650407
TM		 4418 struct nfs_fh fh;
4419 nfs4_stateid stateid;
26e976a8 4420 unsigned long timestamp;
fa178f29 4421 struct nfs_fattr fattr;
fe650407
TM		 4422 int rpc_status;
4423};
4424
fe650407
TM		 4425static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4426{
4427 struct nfs4_delegreturndata *data = calldata;
938e1010 4428
14516c3a
TM		 4429 if (!nfs4_sequence_done(task, &data->res.seq_res))
4430 return;
938e1010 4431
79708861 4432 switch (task->tk_status) {
79708861 4433 case 0:
fa178f29 4434 renew_lease(data->res.server, data->timestamp);
79708861 4435 break;
0d08c381
TM		 4436 case -NFS4ERR_ADMIN_REVOKED:
4437 case -NFS4ERR_DELEG_REVOKED:
4438 case -NFS4ERR_BAD_STATEID:
4439 case -NFS4ERR_OLD_STATEID:
4440 case -NFS4ERR_STALE_STATEID:
4441 case -NFS4ERR_EXPIRED:
4442 task->tk_status = 0;
4443 break;
79708861
RL		 4444 default:
4445 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4446 -EAGAIN) {
d00c5d43 4447 rpc_restart_call_prepare(task);
79708861
RL		 4448 return;
4449 }
4450 }
4451 data->rpc_status = task->tk_status;
fe650407
TM		 4452}
4453
4454static void nfs4_delegreturn_release(void *calldata)
4455{
fe650407
TM		 4456 kfree(calldata);
4457}
4458
938e1010
AA		 4459#if defined(CONFIG_NFS_V4_1)
4460static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4461{
4462 struct nfs4_delegreturndata *d_data;
4463
4464 d_data = (struct nfs4_delegreturndata *)data;
4465
d9afbd1b
TM		 4466 nfs4_setup_sequence(d_data->res.server,
4467 &d_data->args.seq_args,
4468 &d_data->res.seq_res,
4469 task);
938e1010
AA		 4470}
4471#endif /* CONFIG_NFS_V4_1 */
4472
c8d149f3 4473static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4474#if defined(CONFIG_NFS_V4_1)
4475 .rpc_call_prepare = nfs4_delegreturn_prepare,
4476#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4477 .rpc_call_done = nfs4_delegreturn_done,
4478 .rpc_release = nfs4_delegreturn_release,
4479};
4480
e6f81075 4481static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4482{
4483 struct nfs4_delegreturndata *data;
fa178f29 4484 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4485 struct rpc_task *task;
5138fde0
TM		 4486 struct rpc_message msg = {
4487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4488 .rpc_cred = cred,
4489 };
c970aa85
TM		 4490 struct rpc_task_setup task_setup_data = {
4491 .rpc_client = server->client,
5138fde0 4492 .rpc_message = &msg,
c970aa85
TM		 4493 .callback_ops = &nfs4_delegreturn_ops,
4494 .flags = RPC_TASK_ASYNC,
4495 };
e6f81075 4496 int status = 0;
fe650407 4497
8535b2be 4498 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4499 if (data == NULL)
4500 return -ENOMEM;
9d12b216 4501 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4502 data->args.fhandle = &data->fh;
4503 data->args.stateid = &data->stateid;
9e907fec 4504 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4505 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4506 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4507 data->res.fattr = &data->fattr;
4508 data->res.server = server;
5138fde0 4509 nfs_fattr_init(data->res.fattr);
26e976a8 4510 data->timestamp = jiffies;
fe650407
TM		 4511 data->rpc_status = 0;
4512
c970aa85 4513 task_setup_data.callback_data = data;
1174dd1f
TM		 4514 msg.rpc_argp = &data->args;
4515 msg.rpc_resp = &data->res;
c970aa85 4516 task = rpc_run_task(&task_setup_data);
7a1218a2 4517 if (IS_ERR(task))
fe650407 4518 return PTR_ERR(task);
e6f81075
TM		 4519 if (!issync)
4520 goto out;
fe650407 4521 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4522 if (status != 0)
4523 goto out;
4524 status = data->rpc_status;
e144cbcc
TM		 4525 if (status == 0)
4526 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4527 else
4528 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4529out:
e6b3c4db 4530 rpc_put_task(task);
fe650407 4531 return status;
1da177e4
LT		 4532}
4533
e6f81075 4534int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4535{
4536 struct nfs_server *server = NFS_SERVER(inode);
4537 struct nfs4_exception exception = { };
4538 int err;
4539 do {
e6f81075 4540 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4541 switch (err) {
4542 case -NFS4ERR_STALE_STATEID:
4543 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4544 case 0:
4545 return 0;
4546 }
4547 err = nfs4_handle_exception(server, err, &exception);
4548 } while (exception.retry);
4549 return err;
4550}
4551
4552#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4553#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4554
4555/*
4556 * sleep, with exponential backoff, and retry the LOCK operation.
4557 */
4558static unsigned long
4559nfs4_set_lock_task_retry(unsigned long timeout)
4560{
6fa3eb70 4561 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 4562 timeout <<= 1;
4563 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4564 return NFS4_LOCK_MAXTIMEOUT;
4565 return timeout;
4566}
4567
1da177e4
LT		 4568static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4569{
4570 struct inode *inode = state->inode;
4571 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4572 struct nfs_client *clp = server->nfs_client;
911d1aaf 4573 struct nfs_lockt_args arg = {
1da177e4 4574 .fh = NFS_FH(inode),
911d1aaf 4575 .fl = request,
1da177e4 4576 };
911d1aaf
TM		 4577 struct nfs_lockt_res res = {
4578 .denied = request,
1da177e4
LT		 4579 };
4580 struct rpc_message msg = {
4581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4582 .rpc_argp = &arg,
4583 .rpc_resp = &res,
4584 .rpc_cred = state->owner->so_cred,
4585 };
1da177e4
LT		 4586 struct nfs4_lock_state *lsp;
4587 int status;
4588
911d1aaf 4589 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4590 status = nfs4_set_lock_state(state, request);
4591 if (status != 0)
4592 goto out;
4593 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4594 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4595 arg.lock_owner.s_dev = server->s_dev;
7c513058 4596 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4597 switch (status) {
4598 case 0:
4599 request->fl_type = F_UNLCK;
4600 break;
4601 case -NFS4ERR_DENIED:
4602 status = 0;
1da177e4 4603 }
70cc6487 4604 request->fl_ops->fl_release_private(request);
55fce163 4605 request->fl_ops = NULL;
8d0a8a9d 4606out:
1da177e4
LT		 4607 return status;
4608}
4609
4610static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4611{
4612 struct nfs4_exception exception = { };
4613 int err;
4614
4615 do {
4616 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4617 _nfs4_proc_getlk(state, cmd, request),
4618 &exception);
4619 } while (exception.retry);
4620 return err;
4621}
4622
4623static int do_vfs_lock(struct file *file, struct file_lock *fl)
4624{
4625 int res = 0;
4626 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4627 case FL_POSIX:
4628 res = posix_lock_file_wait(file, fl);
4629 break;
4630 case FL_FLOCK:
4631 res = flock_lock_file_wait(file, fl);
4632 break;
4633 default:
4634 BUG();
4635 }
1da177e4
LT		 4636 return res;
4637}
4638
faf5f49c 4639struct nfs4_unlockdata {
911d1aaf
TM		 4640 struct nfs_locku_args arg;
4641 struct nfs_locku_res res;
faf5f49c
TM		 4642 struct nfs4_lock_state *lsp;
4643 struct nfs_open_context *ctx;
911d1aaf
TM		 4644 struct file_lock fl;
4645 const struct nfs_server *server;
26e976a8 4646 unsigned long timestamp;
faf5f49c
TM		 4647};
4648
911d1aaf
TM		 4649static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4650 struct nfs_open_context *ctx,
4651 struct nfs4_lock_state *lsp,
4652 struct nfs_seqid *seqid)
4653{
4654 struct nfs4_unlockdata *p;
4655 struct inode *inode = lsp->ls_state->inode;
4656
8535b2be 4657 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4658 if (p == NULL)
4659 return NULL;
4660 p->arg.fh = NFS_FH(inode);
4661 p->arg.fl = &p->fl;
4662 p->arg.seqid = seqid;
c1d51931 4663 p->res.seqid = seqid;
911d1aaf
TM		 4664 p->arg.stateid = &lsp->ls_stateid;
4665 p->lsp = lsp;
4666 atomic_inc(&lsp->ls_count);
4667 /* Ensure we don't close file until we're done freeing locks! */
4668 p->ctx = get_nfs_open_context(ctx);
4669 memcpy(&p->fl, fl, sizeof(p->fl));
4670 p->server = NFS_SERVER(inode);
4671 return p;
4672}
4673
06f814a3 4674static void nfs4_locku_release_calldata(void *data)
faf5f49c 4675{
963d8fe5 4676 struct nfs4_unlockdata *calldata = data;
911d1aaf 4677 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4678 nfs4_put_lock_state(calldata->lsp);
4679 put_nfs_open_context(calldata->ctx);
4680 kfree(calldata);
faf5f49c
TM		 4681}
4682
963d8fe5 4683static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4684{
963d8fe5 4685 struct nfs4_unlockdata *calldata = data;
faf5f49c 4686
14516c3a
TM		 4687 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4688 return;
faf5f49c
TM		 4689 switch (task->tk_status) {
4690 case 0:
f597c537
TM		 4691 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4692 &calldata->res.stateid);
26e976a8 4693 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4694 break;
9e33bed5
TM		 4695 case -NFS4ERR_BAD_STATEID:
4696 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4697 case -NFS4ERR_STALE_STATEID:
4698 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4699 break;
4700 default:
9e33bed5 4701 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4702 rpc_restart_call_prepare(task);
faf5f49c 4703 }
2b1bc308 4704 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4705}
4706
4ce70ada 4707static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4708{
4ce70ada 4709 struct nfs4_unlockdata *calldata = data;
faf5f49c 4710
911d1aaf 4711 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4712 goto out_wait;
795a88c9 4713 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4714 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4715 goto out_no_action;
faf5f49c 4716 }
26e976a8 4717 calldata->timestamp = jiffies;
035168ab 4718 if (nfs4_setup_sequence(calldata->server,
a893693c 4719 &calldata->arg.seq_args,
2240a9e2
TM		 4720 &calldata->res.seq_res,
4721 task) != 0)
4722 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4723 return;
4724out_no_action:
4725 task->tk_action = NULL;
4726out_wait:
4727 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4728}
4729
963d8fe5 4730static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4731 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4732 .rpc_call_done = nfs4_locku_done,
06f814a3 4733 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4734};
4735
a5d16a4d
TM		 4736static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4737 struct nfs_open_context *ctx,
4738 struct nfs4_lock_state *lsp,
4739 struct nfs_seqid *seqid)
4740{
4741 struct nfs4_unlockdata *data;
5138fde0
TM		 4742 struct rpc_message msg = {
4743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4744 .rpc_cred = ctx->cred,
4745 };
c970aa85
TM		 4746 struct rpc_task_setup task_setup_data = {
4747 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4748 .rpc_message = &msg,
c970aa85 4749 .callback_ops = &nfs4_locku_ops,
101070ca 4750 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4751 .flags = RPC_TASK_ASYNC,
4752 };
a5d16a4d 4753
137d6aca
FF		 4754 /* Ensure this is an unlock - when canceling a lock, the
4755 * canceled lock is passed in, and it won't be an unlock.
4756 */
4757 fl->fl_type = F_UNLCK;
4758
a5d16a4d
TM		 4759 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4760 if (data == NULL) {
4761 nfs_free_seqid(seqid);
4762 return ERR_PTR(-ENOMEM);
4763 }
4764
9d12b216 4765 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4766 msg.rpc_argp = &data->arg;
4767 msg.rpc_resp = &data->res;
c970aa85
TM		 4768 task_setup_data.callback_data = data;
4769 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4770}
4771
faf5f49c
TM		 4772static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4773{
65b62a29
TM		 4774 struct inode *inode = state->inode;
4775 struct nfs4_state_owner *sp = state->owner;
4776 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4777 struct nfs_seqid *seqid;
1da177e4 4778 struct nfs4_lock_state *lsp;
06f814a3
TM		 4779 struct rpc_task *task;
4780 int status = 0;
536ff0f8 4781 unsigned char fl_flags = request->fl_flags;
faf5f49c 4782
8d0a8a9d 4783 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4784 /* Unlock _before_ we do the RPC call */
4785 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4786 /* Exclude nfs_delegation_claim_locks() */
4787 mutex_lock(&sp->so_delegreturn_mutex);
4788 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4789 down_read(&nfsi->rwsem);
4790 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4791 up_read(&nfsi->rwsem);
65b62a29 4792 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4793 goto out;
19e03c57
TM		 4794 }
4795 up_read(&nfsi->rwsem);
65b62a29 4796 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4797 if (status != 0)
9b073574
TM		 4798 goto out;
4799 /* Is this a delegated lock? */
8d0a8a9d 4800 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 4801 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
4802 goto out;
8535b2be 4803 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4804 status = -ENOMEM;
911d1aaf 4805 if (seqid == NULL)
9b073574 4806 goto out;
cd3758e3 4807 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4808 status = PTR_ERR(task);
4809 if (IS_ERR(task))
9b073574 4810 goto out;
a5d16a4d 4811 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4812 rpc_put_task(task);
9b073574 4813out:
536ff0f8 4814 request->fl_flags = fl_flags;
1da177e4
LT		 4815 return status;
4816}
4817
a5d16a4d
TM		 4818struct nfs4_lockdata {
4819 struct nfs_lock_args arg;
4820 struct nfs_lock_res res;
4821 struct nfs4_lock_state *lsp;
4822 struct nfs_open_context *ctx;
4823 struct file_lock fl;
26e976a8 4824 unsigned long timestamp;
a5d16a4d
TM		 4825 int rpc_status;
4826 int cancelled;
66179efe 4827 struct nfs_server *server;
a5d16a4d
TM		 4828};
4829
4830static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4831 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4832 gfp_t gfp_mask)
1da177e4 4833{
a5d16a4d
TM		 4834 struct nfs4_lockdata *p;
4835 struct inode *inode = lsp->ls_state->inode;
1da177e4 4836 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4837
8535b2be 4838 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4839 if (p == NULL)
4840 return NULL;
4841
4842 p->arg.fh = NFS_FH(inode);
4843 p->arg.fl = &p->fl;
8535b2be 4844 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4845 if (p->arg.open_seqid == NULL)
4846 goto out_free;
8535b2be 4847 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4848 if (p->arg.lock_seqid == NULL)
2f74c0a0 4849 goto out_free_seqid;
a5d16a4d 4850 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4851 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4852 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4853 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4854 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4855 p->lsp = lsp;
66179efe 4856 p->server = server;
a5d16a4d
TM		 4857 atomic_inc(&lsp->ls_count);
4858 p->ctx = get_nfs_open_context(ctx);
4859 memcpy(&p->fl, fl, sizeof(p->fl));
4860 return p;
2f74c0a0
TM		 4861out_free_seqid:
4862 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4863out_free:
4864 kfree(p);
4865 return NULL;
4866}
4867
4868static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4869{
4870 struct nfs4_lockdata *data = calldata;
4871 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4872
3110ff80 4873 dprintk("%s: begin!\n", __func__);
2f74c0a0 4874 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4875 goto out_wait;
a5d16a4d
TM		 4876 /* Do we need to do an open_to_lock_owner? */
4877 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4878 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4879 goto out_release_lock_seqid;
8fe72bac 4880 }
8e472f33 4881 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4882 data->arg.new_lock_owner = 1;
c1d51931 4883 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4884 } else
4885 data->arg.new_lock_owner = 0;
5d422301
TM		 4886 if (!nfs4_valid_open_stateid(state)) {
4887 data->rpc_status = -EBADF;
4888 task->tk_action = NULL;
4889 goto out_release_open_seqid;
4890 }
26e976a8 4891 data->timestamp = jiffies;
035168ab
TM		 4892 if (nfs4_setup_sequence(data->server,
4893 &data->arg.seq_args,
2240a9e2 4894 &data->res.seq_res,
d9afbd1b 4895 task) == 0)
66179efe 4896 return;
5d422301 4897out_release_open_seqid:
2240a9e2
TM		 4898 nfs_release_seqid(data->arg.open_seqid);
4899out_release_lock_seqid:
4900 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4901out_wait:
4902 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4903 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4904}
4905
a5d16a4d
TM		 4906static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4907{
4908 struct nfs4_lockdata *data = calldata;
4909
3110ff80 4910 dprintk("%s: begin!\n", __func__);
a5d16a4d 4911
14516c3a
TM		 4912 if (!nfs4_sequence_done(task, &data->res.seq_res))
4913 return;
66179efe 4914
a5d16a4d 4915 data->rpc_status = task->tk_status;
a5d16a4d 4916 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4917 if (data->rpc_status == 0)
4918 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4919 else
4920 goto out;
4921 }
4922 if (data->rpc_status == 0) {
f597c537 4923 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4924 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4925 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4926 }
a5d16a4d 4927out:
3110ff80 4928 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4929}
4930
4931static void nfs4_lock_release(void *calldata)
4932{
4933 struct nfs4_lockdata *data = calldata;
4934
3110ff80 4935 dprintk("%s: begin!\n", __func__);
2f74c0a0 4936 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4937 if (data->cancelled != 0) {
4938 struct rpc_task *task;
4939 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4940 data->arg.lock_seqid);
4941 if (!IS_ERR(task))
bf294b41 4942 rpc_put_task_async(task);
3110ff80 4943 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4944 } else
4945 nfs_free_seqid(data->arg.lock_seqid);
4946 nfs4_put_lock_state(data->lsp);
4947 put_nfs_open_context(data->ctx);
4948 kfree(data);
3110ff80 4949 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4950}
4951
4952static const struct rpc_call_ops nfs4_lock_ops = {
4953 .rpc_call_prepare = nfs4_lock_prepare,
4954 .rpc_call_done = nfs4_lock_done,
4955 .rpc_release = nfs4_lock_release,
4956};
4957
2bee72a6
TM		 4958static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4959{
2bee72a6
TM		 4960 switch (error) {
4961 case -NFS4ERR_ADMIN_REVOKED:
4962 case -NFS4ERR_BAD_STATEID:
ecac799a 4963 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4964 if (new_lock_owner != 0 ||
795a88c9 4965 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4966 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4967 break;
4968 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4969 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4970 case -NFS4ERR_EXPIRED:
4971 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4972 };
4973}
4974
afe6c27c 4975static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4976{
4977 struct nfs4_lockdata *data;
4978 struct rpc_task *task;
5138fde0
TM		 4979 struct rpc_message msg = {
4980 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4981 .rpc_cred = state->owner->so_cred,
4982 };
c970aa85
TM		 4983 struct rpc_task_setup task_setup_data = {
4984 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4985 .rpc_message = &msg,
c970aa85 4986 .callback_ops = &nfs4_lock_ops,
101070ca 4987 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4988 .flags = RPC_TASK_ASYNC,
4989 };
a5d16a4d
TM		 4990 int ret;
4991
3110ff80 4992 dprintk("%s: begin!\n", __func__);
cd3758e3 4993 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4994 fl->fl_u.nfs4_fl.owner,
4995 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4996 if (data == NULL)
4997 return -ENOMEM;
4998 if (IS_SETLKW(cmd))
4999 data->arg.block = 1;
9d12b216 5000 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5001 msg.rpc_argp = &data->arg;
5002 msg.rpc_resp = &data->res;
c970aa85 5003 task_setup_data.callback_data = data;
8fe72bac
TM		 5004 if (recovery_type > NFS_LOCK_NEW) {
5005 if (recovery_type == NFS_LOCK_RECLAIM)
5006 data->arg.reclaim = NFS_LOCK_RECLAIM;
5007 nfs4_set_sequence_privileged(&data->arg.seq_args);
5008 }
c970aa85 5009 task = rpc_run_task(&task_setup_data);
7a1218a2 5010 if (IS_ERR(task))
a5d16a4d 5011 return PTR_ERR(task);
a5d16a4d
TM		 5012 ret = nfs4_wait_for_completion_rpc_task(task);
5013 if (ret == 0) {
5014 ret = data->rpc_status;
2bee72a6
TM		 5015 if (ret)
5016 nfs4_handle_setlk_error(data->server, data->lsp,
5017 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5018 } else
5019 data->cancelled = 1;
e6b3c4db 5020 rpc_put_task(task);
3110ff80 5021 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5022 return ret;
1da177e4
LT		 5023}
5024
5025static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5026{
202b50dc 5027 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5028 struct nfs4_exception exception = {
5029 .inode = state->inode,
5030 };
202b50dc
TM		 5031 int err;
5032
5033 do {
42a2d13e
TM		 5034 /* Cache the lock if possible... */
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_RECLAIM);
168667c4 5038 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5039 break;
5040 nfs4_handle_exception(server, err, &exception);
5041 } while (exception.retry);
5042 return err;
1da177e4
LT		 5043}
5044
5045static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5046{
202b50dc 5047 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5048 struct nfs4_exception exception = {
5049 .inode = state->inode,
5050 };
202b50dc
TM		 5051 int err;
5052
6bfc93ef
TM		 5053 err = nfs4_set_lock_state(state, request);
5054 if (err != 0)
5055 return err;
202b50dc 5056 do {
42a2d13e
TM		 5057 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5058 return 0;
afe6c27c 5059 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5060 switch (err) {
5061 default:
5062 goto out;
5063 case -NFS4ERR_GRACE:
5064 case -NFS4ERR_DELAY:
5065 nfs4_handle_exception(server, err, &exception);
5066 err = 0;
5067 }
202b50dc 5068 } while (exception.retry);
a9ed2e25 5069out:
202b50dc 5070 return err;
1da177e4
LT		 5071}
5072
f062eb6c 5073#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5074/**
5075 * nfs41_check_expired_locks - possibly free a lock stateid
5076 *
5077 * @state: NFSv4 state for an inode
5078 *
5079 * Returns NFS_OK if recovery for this stateid is now finished.
5080 * Otherwise a negative NFS4ERR value is returned.
5081 */
b01dd1d8 5082static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5083{
eb64cf96 5084 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5085 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5086 struct nfs_server *server = NFS_SERVER(state->inode);
5087
b01dd1d8 5088 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5089 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 5090 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5091 if (status != NFS_OK) {
3e60ffdd
CL		 5092 /* Free the stateid unless the server
5093 * informs us the stateid is unrecognized. */
89af2739
CL		 5094 if (status != -NFS4ERR_BAD_STATEID)
5095 nfs41_free_stateid(server,
5096 &lsp->ls_stateid);
795a88c9 5097 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5098 ret = status;
5099 }
5100 }
5101 };
5102
5103 return ret;
5104}
5105
5106static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5107{
5108 int status = NFS_OK;
5109
5110 if (test_bit(LK_STATE_IN_USE, &state->flags))
5111 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5112 if (status != NFS_OK)
5113 status = nfs4_lock_expired(state, request);
5114 return status;
f062eb6c
BS		 5115}
5116#endif
5117
1da177e4
LT		 5118static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5119{
9a99af49 5120 struct nfs4_state_owner *sp = state->owner;
19e03c57 5121 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5122 unsigned char fl_flags = request->fl_flags;
9a99af49 5123 unsigned int seq;
8e469ebd 5124 int status = -ENOLCK;
1da177e4 5125
8e469ebd
TM		 5126 if ((fl_flags & FL_POSIX) &&
5127 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5128 goto out;
6bfc93ef 5129 /* Is this a delegated open? */
6bfc93ef
TM		 5130 status = nfs4_set_lock_state(state, request);
5131 if (status != 0)
5132 goto out;
01c3b861
TM		 5133 request->fl_flags |= FL_ACCESS;
5134 status = do_vfs_lock(request->fl_file, request);
5135 if (status < 0)
5136 goto out;
19e03c57 5137 down_read(&nfsi->rwsem);
01c3b861 5138 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5139 /* Yes: cache locks! */
01c3b861 5140 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5141 request->fl_flags = fl_flags & ~FL_SLEEP;
5142 status = do_vfs_lock(request->fl_file, request);
5143 goto out_unlock;
01c3b861 5144 }
9a99af49
TM		 5145 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5146 up_read(&nfsi->rwsem);
afe6c27c 5147 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5148 if (status != 0)
9a99af49
TM		 5149 goto out;
5150 down_read(&nfsi->rwsem);
5151 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5152 status = -NFS4ERR_DELAY;
01c3b861 5153 goto out_unlock;
9a99af49 5154 }
6bfc93ef 5155 /* Note: we always want to sleep here! */
01c3b861 5156 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5157 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5158 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5159 "manager!\n", __func__);
01c3b861 5160out_unlock:
19e03c57 5161 up_read(&nfsi->rwsem);
01c3b861
TM		 5162out:
5163 request->fl_flags = fl_flags;
1da177e4
LT		 5164 return status;
5165}
5166
5167static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5168{
a1d0b5ee
TM		 5169 struct nfs4_exception exception = {
5170 .state = state,
05ffe24f 5171 .inode = state->inode,
a1d0b5ee 5172 };
1da177e4
LT		 5173 int err;
5174
5175 do {
965b5d67
TM		 5176 err = _nfs4_proc_setlk(state, cmd, request);
5177 if (err == -NFS4ERR_DENIED)
5178 err = -EAGAIN;
1da177e4 5179 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5180 err, &exception);
1da177e4
LT		 5181 } while (exception.retry);
5182 return err;
5183}
5184
5185static int
5186nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5187{
5188 struct nfs_open_context *ctx;
5189 struct nfs4_state *state;
5190 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5191 int status;
5192
5193 /* verify open state */
cd3758e3 5194 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5195 state = ctx->state;
5196
5197 if (request->fl_start < 0 || request->fl_end < 0)
5198 return -EINVAL;
5199
d953126a
TM		 5200 if (IS_GETLK(cmd)) {
5201 if (state != NULL)
5202 return nfs4_proc_getlk(state, F_GETLK, request);
5203 return 0;
5204 }
1da177e4
LT		 5205
5206 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5207 return -EINVAL;
5208
d953126a
TM		 5209 if (request->fl_type == F_UNLCK) {
5210 if (state != NULL)
5211 return nfs4_proc_unlck(state, cmd, request);
5212 return 0;
5213 }
1da177e4 5214
d953126a
TM		 5215 if (state == NULL)
5216 return -ENOLCK;
55725513
TM		 5217 /*
5218 * Don't rely on the VFS having checked the file open mode,
5219 * since it won't do this for flock() locks.
5220 */
f44106e2 5221 switch (request->fl_type) {
55725513
TM		 5222 case F_RDLCK:
5223 if (!(filp->f_mode & FMODE_READ))
5224 return -EBADF;
5225 break;
5226 case F_WRLCK:
5227 if (!(filp->f_mode & FMODE_WRITE))
5228 return -EBADF;
5229 }
5230
1da177e4
LT		 5231 do {
5232 status = nfs4_proc_setlk(state, cmd, request);
5233 if ((status != -EAGAIN) || IS_SETLK(cmd))
5234 break;
5235 timeout = nfs4_set_lock_task_retry(timeout);
5236 status = -ERESTARTSYS;
5237 if (signalled())
5238 break;
5239 } while(status < 0);
1da177e4
LT		 5240 return status;
5241}
5242
db4f2e63 5243int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5244{
5245 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5246 int err;
5247
5248 err = nfs4_set_lock_state(state, fl);
5249 if (err != 0)
db4f2e63 5250 return err;
4a706fa0 5251 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5252 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5253}
6b3b5496 5254
cf470c3e
TM		 5255struct nfs_release_lockowner_data {
5256 struct nfs4_lock_state *lsp;
5ae67c4f 5257 struct nfs_server *server;
cf470c3e
TM		 5258 struct nfs_release_lockowner_args args;
5259};
5260
d3c7b7cc
TM		 5261static void nfs4_release_lockowner_release(void *calldata)
5262{
cf470c3e 5263 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5264 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5265 kfree(calldata);
5266}
5267
17280175 5268static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5269 .rpc_release = nfs4_release_lockowner_release,
5270};
5271
c8b2d0bf 5272static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5273{
cf470c3e 5274 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5275 struct rpc_message msg = {
5276 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5277 };
5278
5279 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5280 return -EINVAL;
5281 data = kmalloc(sizeof(*data), GFP_NOFS);
5282 if (!data)
5283 return -ENOMEM;
5284 data->lsp = lsp;
5ae67c4f 5285 data->server = server;
cf470c3e
TM		 5286 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5287 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5288 data->args.lock_owner.s_dev = server->s_dev;
5289 msg.rpc_argp = &data->args;
5290 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5291 return 0;
d3c7b7cc
TM		 5292}
5293
aa1870af
BF		 5294#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5295
64c2ce8b
AK		 5296static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5297 const void *buf, size_t buflen,
5298 int flags, int type)
6b3b5496 5299{
64c2ce8b
AK		 5300 if (strcmp(key, "") != 0)
5301 return -EINVAL;
4b580ee3 5302
64c2ce8b 5303 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5304}
5305
64c2ce8b
AK		 5306static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5307 void *buf, size_t buflen, int type)
6b3b5496 5308{
64c2ce8b
AK		 5309 if (strcmp(key, "") != 0)
5310 return -EINVAL;
aa1870af 5311
64c2ce8b 5312 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5313}
5314
64c2ce8b
AK		 5315static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5316 size_t list_len, const char *name,
5317 size_t name_len, int type)
6b3b5496 5318{
64c2ce8b 5319 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5320
096455a2
BF		 5321 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5322 return 0;
64c2ce8b
AK		 5323
5324 if (list && len <= list_len)
5325 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5326 return len;
6b3b5496
BF		 5327}
5328
533eb461
AA		 5329/*
5330 * nfs_fhget will use either the mounted_on_fileid or the fileid
5331 */
69aaaae1
TM		 5332static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5333{
533eb461
AA		 5334 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5335 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5336 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5337 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5338 return;
5339
5340 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5341 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5342 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5343 fattr->nlink = 2;
5344}
5345
f05d147f
BS		 5346static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5347 const struct qstr *name,
5348 struct nfs4_fs_locations *fs_locations,
5349 struct page *page)
683b57b4
TM		 5350{
5351 struct nfs_server *server = NFS_SERVER(dir);
5352 u32 bitmask[2] = {
361e624f 5353 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5354 };
5355 struct nfs4_fs_locations_arg args = {
5356 .dir_fh = NFS_FH(dir),
c228fd3a 5357 .name = name,
683b57b4
TM		 5358 .page = page,
5359 .bitmask = bitmask,
5360 };
22958463
BH		 5361 struct nfs4_fs_locations_res res = {
5362 .fs_locations = fs_locations,
5363 };
683b57b4
TM		 5364 struct rpc_message msg = {
5365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5366 .rpc_argp = &args,
22958463 5367 .rpc_resp = &res,
683b57b4
TM		 5368 };
5369 int status;
5370
3110ff80 5371 dprintk("%s: start\n", __func__);
533eb461
AA		 5372
5373 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5374 * is not supported */
5375 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5376 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5377 else
5378 bitmask[0] |= FATTR4_WORD0_FILEID;
5379
c228fd3a 5380 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5381 fs_locations->server = server;
830b8e33 5382 fs_locations->nlocations = 0;
f05d147f 5383 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5384 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5385 return status;
5386}
5387
f05d147f
BS		 5388int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5389 const struct qstr *name,
5390 struct nfs4_fs_locations *fs_locations,
5391 struct page *page)
db0a9593
BS		 5392{
5393 struct nfs4_exception exception = { };
5394 int err;
5395 do {
5396 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5397 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5398 &exception);
5399 } while (exception.retry);
5400 return err;
5401}
5402
5a5ea0d4
BS		 5403static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5404{
5405 int status;
5406 struct nfs4_secinfo_arg args = {
5407 .dir_fh = NFS_FH(dir),
5408 .name = name,
5409 };
5410 struct nfs4_secinfo_res res = {
5411 .flavors = flavors,
5412 };
5413 struct rpc_message msg = {
5414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5415 .rpc_argp = &args,
5416 .rpc_resp = &res,
5417 };
5418
5419 dprintk("NFS call secinfo %s\n", name->name);
5420 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5421 dprintk("NFS reply secinfo: %d\n", status);
5422 return status;
5423}
5424
72de53ec
BS		 5425int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5426 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5427{
5428 struct nfs4_exception exception = { };
5429 int err;
5430 do {
5431 err = nfs4_handle_exception(NFS_SERVER(dir),
5432 _nfs4_proc_secinfo(dir, name, flavors),
5433 &exception);
5434 } while (exception.retry);
5435 return err;
5436}
5437
557134a3 5438#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5439/*
5440 * Check the exchange flags returned by the server for invalid flags, having
5441 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5442 * DS flags set.
5443 */
5444static int nfs4_check_cl_exchange_flags(u32 flags)
5445{
5446 if (flags & ~EXCHGID4_FLAG_MASK_R)
5447 goto out_inval;
5448 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5449 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5450 goto out_inval;
5451 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5452 goto out_inval;
5453 return NFS_OK;
5454out_inval:
5455 return -NFS4ERR_INVAL;
5456}
5457
78fe0f41 5458static bool
79d4e1f0
CL		 5459nfs41_same_server_scope(struct nfs41_server_scope *a,
5460 struct nfs41_server_scope *b)
78fe0f41
WAA		 5461{
5462 if (a->server_scope_sz == b->server_scope_sz &&
5463 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5464 return true;
5465
5466 return false;
5467}
5468
7c44f1ae
WAA		 5469/*
5470 * nfs4_proc_bind_conn_to_session()
5471 *
5472 * The 4.1 client currently uses the same TCP connection for the
5473 * fore and backchannel.
5474 */
2cf047c9 5475int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5476{
5477 int status;
5478 struct nfs41_bind_conn_to_session_res res;
5479 struct rpc_message msg = {
5480 .rpc_proc =
5481 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5482 .rpc_argp = clp,
5483 .rpc_resp = &res,
2cf047c9 5484 .rpc_cred = cred,
7c44f1ae
WAA		 5485 };
5486
5487 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5488
5489 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5490 if (unlikely(res.session == NULL)) {
5491 status = -ENOMEM;
5492 goto out;
5493 }
5494
5495 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5496 if (status == 0) {
5497 if (memcmp(res.session->sess_id.data,
5498 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5499 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5500 status = -EIO;
5501 goto out_session;
5502 }
5503 if (res.dir != NFS4_CDFS4_BOTH) {
5504 dprintk("NFS: %s: Unexpected direction from server\n",
5505 __func__);
5506 status = -EIO;
5507 goto out_session;
5508 }
5509 if (res.use_conn_in_rdma_mode) {
5510 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5511 __func__);
5512 status = -EIO;
5513 goto out_session;
5514 }
5515 }
5516out_session:
5517 kfree(res.session);
5518out:
5519 dprintk("<-- %s status= %d\n", __func__, status);
5520 return status;
5521}
5522
99fe60d0
BH		 5523/*
5524 * nfs4_proc_exchange_id()
5525 *
6bbb4ae8
CL		 5526 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5527 *
99fe60d0
BH		 5528 * Since the clientid has expired, all compounds using sessions
5529 * associated with the stale clientid will be returning
5530 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5531 * be in some phase of session reset.
5532 */
4d643d1d 5533int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5534{
5535 nfs4_verifier verifier;
5536 struct nfs41_exchange_id_args args = {
cd93710e 5537 .verifier = &verifier,
99fe60d0 5538 .client = clp,
357f54d6 5539 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5540 };
5541 struct nfs41_exchange_id_res res = {
32b01310 5542 0
99fe60d0
BH		 5543 };
5544 int status;
5545 struct rpc_message msg = {
5546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5547 .rpc_argp = &args,
5548 .rpc_resp = &res,
5549 .rpc_cred = cred,
5550 };
99fe60d0 5551
f092075d 5552 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5553 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5554 sizeof(args.id));
6bbb4ae8
CL		 5555 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5556 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5557 args.id_len, args.id);
99fe60d0 5558
acdeb69d 5559 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5560 GFP_NOFS);
acdeb69d 5561 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5562 status = -ENOMEM;
5563 goto out;
5564 }
78fe0f41 5565
79d4e1f0 5566 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5567 GFP_NOFS);
177313f1 5568 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5569 status = -ENOMEM;
acdeb69d 5570 goto out_server_owner;
abe9a6d5 5571 }
78fe0f41 5572
bbafffd2 5573 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5574 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5575 status = -ENOMEM;
5576 goto out_server_scope;
5577 }
5578
1bd714f2 5579 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5580 if (status == 0)
32b01310 5581 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5582
acdeb69d 5583 if (status == 0) {
32b01310
TM		 5584 clp->cl_clientid = res.clientid;
5585 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5586 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5587 clp->cl_seqid = res.seqid;
5588
acdeb69d
CL		 5589 kfree(clp->cl_serverowner);
5590 clp->cl_serverowner = res.server_owner;
5591 res.server_owner = NULL;
78fe0f41 5592
7d2ed9ac 5593 /* use the most recent implementation id */
59155546
CL		 5594 kfree(clp->cl_implid);
5595 clp->cl_implid = res.impl_id;
7d2ed9ac 5596
177313f1 5597 if (clp->cl_serverscope != NULL &&
79d4e1f0 5598 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5599 res.server_scope)) {
5600 dprintk("%s: server_scope mismatch detected\n",
5601 __func__);
5602 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5603 kfree(clp->cl_serverscope);
5604 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5605 }
5606
177313f1 5607 if (clp->cl_serverscope == NULL) {
79d4e1f0 5608 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5609 goto out;
5610 }
32b01310
TM		 5611 } else
5612 kfree(res.impl_id);
7d2ed9ac 5613
acdeb69d
CL		 5614out_server_owner:
5615 kfree(res.server_owner);
7d2ed9ac 5616out_server_scope:
abe9a6d5
WAA		 5617 kfree(res.server_scope);
5618out:
177313f1 5619 if (clp->cl_implid != NULL)
6bbb4ae8 5620 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5621 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5622 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5623 clp->cl_implid->date.seconds,
5624 clp->cl_implid->date.nseconds);
6bbb4ae8 5625 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5626 return status;
5627}
5628
66245539
TM		 5629static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5630 struct rpc_cred *cred)
5631{
5632 struct rpc_message msg = {
5633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5634 .rpc_argp = clp,
5635 .rpc_cred = cred,
5636 };
5637 int status;
5638
5639 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5640 if (status)
02c67525 5641 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5642 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5643 return status;
5644}
5645
5646static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5647 struct rpc_cred *cred)
5648{
5649 unsigned int loop;
5650 int ret;
5651
5652 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5653 ret = _nfs4_proc_destroy_clientid(clp, cred);
5654 switch (ret) {
5655 case -NFS4ERR_DELAY:
5656 case -NFS4ERR_CLIENTID_BUSY:
5657 ssleep(1);
5658 break;
5659 default:
5660 return ret;
5661 }
5662 }
5663 return 0;
5664}
5665
5666int nfs4_destroy_clientid(struct nfs_client *clp)
5667{
5668 struct rpc_cred *cred;
5669 int ret = 0;
5670
5671 if (clp->cl_mvops->minor_version < 1)
5672 goto out;
5673 if (clp->cl_exchange_flags == 0)
5674 goto out;
05f4c350
CL		 5675 if (clp->cl_preserve_clid)
5676 goto out;
66245539
TM		 5677 cred = nfs4_get_exchange_id_cred(clp);
5678 ret = nfs4_proc_destroy_clientid(clp, cred);
5679 if (cred)
5680 put_rpccred(cred);
5681 switch (ret) {
5682 case 0:
5683 case -NFS4ERR_STALE_CLIENTID:
5684 clp->cl_exchange_flags = 0;
5685 }
5686out:
5687 return ret;
5688}
5689
2050f0cc
AA		 5690struct nfs4_get_lease_time_data {
5691 struct nfs4_get_lease_time_args *args;
5692 struct nfs4_get_lease_time_res *res;
5693 struct nfs_client *clp;
5694};
5695
5696static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5697 void *calldata)
5698{
2050f0cc
AA		 5699 struct nfs4_get_lease_time_data *data =
5700 (struct nfs4_get_lease_time_data *)calldata;
5701
5702 dprintk("--> %s\n", __func__);
5703 /* just setup sequence, do not trigger session recovery
5704 since we're invoked within one */
d9afbd1b
TM		 5705 nfs41_setup_sequence(data->clp->cl_session,
5706 &data->args->la_seq_args,
5707 &data->res->lr_seq_res,
5708 task);
2050f0cc
AA		 5709 dprintk("<-- %s\n", __func__);
5710}
5711
5712/*
5713 * Called from nfs4_state_manager thread for session setup, so don't recover
5714 * from sequence operation or clientid errors.
5715 */
5716static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5717{
5718 struct nfs4_get_lease_time_data *data =
5719 (struct nfs4_get_lease_time_data *)calldata;
5720
5721 dprintk("--> %s\n", __func__);
14516c3a
TM		 5722 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5723 return;
2050f0cc
AA		 5724 switch (task->tk_status) {
5725 case -NFS4ERR_DELAY:
5726 case -NFS4ERR_GRACE:
5727 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5728 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5729 task->tk_status = 0;
a8a4ae3a
AA		 5730 /* fall through */
5731 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5732 rpc_restart_call_prepare(task);
2050f0cc
AA		 5733 return;
5734 }
2050f0cc
AA		 5735 dprintk("<-- %s\n", __func__);
5736}
5737
17280175 5738static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5739 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5740 .rpc_call_done = nfs4_get_lease_time_done,
5741};
5742
5743int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5744{
5745 struct rpc_task *task;
5746 struct nfs4_get_lease_time_args args;
5747 struct nfs4_get_lease_time_res res = {
5748 .lr_fsinfo = fsinfo,
5749 };
5750 struct nfs4_get_lease_time_data data = {
5751 .args = &args,
5752 .res = &res,
5753 .clp = clp,
5754 };
5755 struct rpc_message msg = {
5756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5757 .rpc_argp = &args,
5758 .rpc_resp = &res,
5759 };
5760 struct rpc_task_setup task_setup = {
5761 .rpc_client = clp->cl_rpcclient,
5762 .rpc_message = &msg,
5763 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5764 .callback_data = &data,
5765 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5766 };
5767 int status;
5768
9d12b216 5769 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5770 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5771 dprintk("--> %s\n", __func__);
5772 task = rpc_run_task(&task_setup);
5773
5774 if (IS_ERR(task))
5775 status = PTR_ERR(task);
5776 else {
5777 status = task->tk_status;
5778 rpc_put_task(task);
5779 }
5780 dprintk("<-- %s return %d\n", __func__, status);
5781
5782 return status;
5783}
5784
fc931582
AA		 5785/*
5786 * Initialize the values to be used by the client in CREATE_SESSION
5787 * If nfs4_init_session set the fore channel request and response sizes,
5788 * use them.
5789 *
5790 * Set the back channel max_resp_sz_cached to zero to force the client to
5791 * always set csa_cachethis to FALSE because the current implementation
5792 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5793 */
5794static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5795{
5796 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5797 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5798 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5799
5800 if (mxrqst_sz == 0)
5801 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5802 if (mxresp_sz == 0)
5803 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5804 /* Fore channel attributes */
fc931582
AA		 5805 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5806 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5807 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5808 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5809
5810 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5811 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5812 __func__,
5813 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5814 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5815
5816 /* Back channel attributes */
fc931582
AA		 5817 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5818 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5819 args->bc_attrs.max_resp_sz_cached = 0;
5820 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5821 args->bc_attrs.max_reqs = 1;
5822
5823 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5824 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5825 __func__,
5826 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5827 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5828 args->bc_attrs.max_reqs);
5829}
5830
43c2e885 5831static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5832{
43c2e885
BF		 5833 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5834 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5835
43c2e885
BF		 5836 if (rcvd->max_resp_sz > sent->max_resp_sz)
5837 return -EINVAL;
5838 /*
5839 * Our requested max_ops is the minimum we need; we're not
5840 * prepared to break up compounds into smaller pieces than that.
5841 * So, no point even trying to continue if the server won't
5842 * cooperate:
5843 */
5844 if (rcvd->max_ops < sent->max_ops)
5845 return -EINVAL;
5846 if (rcvd->max_reqs == 0)
5847 return -EINVAL;
b4b9a0c1
VG		 5848 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5849 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5850 return 0;
8d35301d
AA		 5851}
5852
43c2e885
BF		 5853static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5854{
5855 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5856 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5857
43c2e885
BF		 5858 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5859 return -EINVAL;
5860 if (rcvd->max_resp_sz < sent->max_resp_sz)
5861 return -EINVAL;
5862 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5863 return -EINVAL;
5864 /* These would render the backchannel useless: */
b4b9a0c1 5865 if (rcvd->max_ops != sent->max_ops)
43c2e885 5866 return -EINVAL;
b4b9a0c1 5867 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5868 return -EINVAL;
5869 return 0;
5870}
8d35301d 5871
8d35301d
AA		 5872static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5873 struct nfs4_session *session)
5874{
43c2e885 5875 int ret;
8d35301d 5876
43c2e885
BF		 5877 ret = nfs4_verify_fore_channel_attrs(args, session);
5878 if (ret)
5879 return ret;
5880 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5881}
5882
848f5bda
TM		 5883static int _nfs4_proc_create_session(struct nfs_client *clp,
5884 struct rpc_cred *cred)
fc931582
AA		 5885{
5886 struct nfs4_session *session = clp->cl_session;
5887 struct nfs41_create_session_args args = {
5888 .client = clp,
5889 .cb_program = NFS4_CALLBACK,
5890 };
5891 struct nfs41_create_session_res res = {
5892 .client = clp,
5893 };
5894 struct rpc_message msg = {
5895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5896 .rpc_argp = &args,
5897 .rpc_resp = &res,
848f5bda 5898 .rpc_cred = cred,
fc931582
AA		 5899 };
5900 int status;
5901
5902 nfs4_init_channel_attrs(&args);
0f91421e 5903 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5904
1bd714f2 5905 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5906
43095d39 5907 if (!status) {
8d35301d
AA		 5908 /* Verify the session's negotiated channel_attrs values */
5909 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5910 /* Increment the clientid slot sequence id */
5911 clp->cl_seqid++;
5912 }
5913
5914 return status;
5915}
5916
5917/*
5918 * Issues a CREATE_SESSION operation to the server.
5919 * It is the responsibility of the caller to verify the session is
5920 * expired before calling this routine.
5921 */
848f5bda 5922int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5923{
5924 int status;
5925 unsigned *ptr;
fc931582
AA		 5926 struct nfs4_session *session = clp->cl_session;
5927
5928 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5929
848f5bda 5930 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5931 if (status)
5932 goto out;
5933
aacd5537
AA		 5934 /* Init or reset the session slot tables */
5935 status = nfs4_setup_session_slot_tables(session);
5936 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5937 if (status)
5938 goto out;
5939
5940 ptr = (unsigned *)&session->sess_id.data[0];
5941 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5942 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5943out:
5944 dprintk("<-- %s\n", __func__);
5945 return status;
5946}
5947
0f3e66c6
AA		 5948/*
5949 * Issue the over-the-wire RPC DESTROY_SESSION.
5950 * The caller must serialize access to this routine.
5951 */
848f5bda
TM		 5952int nfs4_proc_destroy_session(struct nfs4_session *session,
5953 struct rpc_cred *cred)
0f3e66c6 5954{
848f5bda
TM		 5955 struct rpc_message msg = {
5956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5957 .rpc_argp = session,
5958 .rpc_cred = cred,
5959 };
0f3e66c6 5960 int status = 0;
0f3e66c6
AA		 5961
5962 dprintk("--> nfs4_proc_destroy_session\n");
5963
5964 /* session is still being setup */
5965 if (session->clp->cl_cons_state != NFS_CS_READY)
5966 return status;
5967
1bd714f2 5968 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5969
5970 if (status)
08106ac7 5971 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5972 "Session has been destroyed regardless...\n", status);
5973
5974 dprintk("<-- nfs4_proc_destroy_session\n");
5975 return status;
5976}
5977
fc01cea9
AA		 5978/*
5979 * Renew the cl_session lease.
5980 */
d5f8d3fe
TM		 5981struct nfs4_sequence_data {
5982 struct nfs_client *clp;
5983 struct nfs4_sequence_args args;
5984 struct nfs4_sequence_res res;
5985};
5986
dc96aef9
AB		 5987static void nfs41_sequence_release(void *data)
5988{
d5f8d3fe
TM		 5989 struct nfs4_sequence_data *calldata = data;
5990 struct nfs_client *clp = calldata->clp;
dc96aef9 5991
7135840f
AB		 5992 if (atomic_read(&clp->cl_count) > 1)
5993 nfs4_schedule_state_renewal(clp);
5994 nfs_put_client(clp);
d5f8d3fe 5995 kfree(calldata);
dc96aef9
AB		 5996}
5997
aa5190d0
TM		 5998static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5999{
6000 switch(task->tk_status) {
6001 case -NFS4ERR_DELAY:
aa5190d0
TM		 6002 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6003 return -EAGAIN;
6004 default:
0400a6b0 6005 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6006 }
6007 return 0;
6008}
6009
dc96aef9 6010static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6011{
d5f8d3fe
TM		 6012 struct nfs4_sequence_data *calldata = data;
6013 struct nfs_client *clp = calldata->clp;
fc01cea9 6014
14516c3a
TM		 6015 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6016 return;
fc01cea9
AA		 6017
6018 if (task->tk_status < 0) {
6019 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6020 if (atomic_read(&clp->cl_count) == 1)
6021 goto out;
fc01cea9 6022
aa5190d0
TM		 6023 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6024 rpc_restart_call_prepare(task);
fc01cea9
AA		 6025 return;
6026 }
6027 }
fc01cea9 6028 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6029out:
fc01cea9
AA		 6030 dprintk("<-- %s\n", __func__);
6031}
6032
6033static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6034{
d5f8d3fe
TM		 6035 struct nfs4_sequence_data *calldata = data;
6036 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6037 struct nfs4_sequence_args *args;
6038 struct nfs4_sequence_res *res;
6039
fc01cea9
AA		 6040 args = task->tk_msg.rpc_argp;
6041 res = task->tk_msg.rpc_resp;
6042
d9afbd1b 6043 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6044}
6045
6046static const struct rpc_call_ops nfs41_sequence_ops = {
6047 .rpc_call_done = nfs41_sequence_call_done,
6048 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6049 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6050};
6051
8fe72bac
TM		 6052static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6053 struct rpc_cred *cred,
6054 bool is_privileged)
fc01cea9 6055{
d5f8d3fe 6056 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6057 struct rpc_message msg = {
6058 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6059 .rpc_cred = cred,
6060 };
71ac6da9
TM		 6061 struct rpc_task_setup task_setup_data = {
6062 .rpc_client = clp->cl_rpcclient,
6063 .rpc_message = &msg,
8fe72bac 6064 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6065 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6066 };
fc01cea9 6067
7135840f 6068 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6069 return ERR_PTR(-EIO);
dfb4f309 6070 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6071 if (calldata == NULL) {
7135840f 6072 nfs_put_client(clp);
71ac6da9 6073 return ERR_PTR(-ENOMEM);
fc01cea9 6074 }
9d12b216 6075 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6076 if (is_privileged)
6077 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6078 msg.rpc_argp = &calldata->args;
6079 msg.rpc_resp = &calldata->res;
6080 calldata->clp = clp;
71ac6da9 6081 task_setup_data.callback_data = calldata;
fc01cea9 6082
71ac6da9
TM		 6083 return rpc_run_task(&task_setup_data);
6084}
6085
2f60ea6b 6086static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6087{
6088 struct rpc_task *task;
6089 int ret = 0;
6090
2f60ea6b 6091 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
f2368dcc 6092 return -EAGAIN;
8fe72bac 6093 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6094 if (IS_ERR(task))
6095 ret = PTR_ERR(task);
6096 else
bf294b41 6097 rpc_put_task_async(task);
71ac6da9
TM		 6098 dprintk("<-- %s status=%d\n", __func__, ret);
6099 return ret;
6100}
6101
6102static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6103{
6104 struct rpc_task *task;
6105 int ret;
6106
8fe72bac 6107 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6108 if (IS_ERR(task)) {
6109 ret = PTR_ERR(task);
6110 goto out;
6111 }
6112 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6113 if (!ret) {
6114 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6115
6116 if (task->tk_status == 0)
6117 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6118 ret = task->tk_status;
b4410c2f 6119 }
71ac6da9
TM		 6120 rpc_put_task(task);
6121out:
6122 dprintk("<-- %s status=%d\n", __func__, ret);
6123 return ret;
fc01cea9
AA		 6124}
6125
fce5c838
RL		 6126struct nfs4_reclaim_complete_data {
6127 struct nfs_client *clp;
6128 struct nfs41_reclaim_complete_args arg;
6129 struct nfs41_reclaim_complete_res res;
6130};
6131
6132static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6133{
6134 struct nfs4_reclaim_complete_data *calldata = data;
6135
d9afbd1b
TM		 6136 nfs41_setup_sequence(calldata->clp->cl_session,
6137 &calldata->arg.seq_args,
6138 &calldata->res.seq_res,
6139 task);
fce5c838
RL		 6140}
6141
aa5190d0
TM		 6142static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6143{
6144 switch(task->tk_status) {
6145 case 0:
6146 case -NFS4ERR_COMPLETE_ALREADY:
6147 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6148 break;
6149 case -NFS4ERR_DELAY:
aa5190d0 6150 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6151 /* fall through */
6152 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6153 return -EAGAIN;
6154 default:
0400a6b0 6155 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6156 }
6157 return 0;
6158}
6159
fce5c838
RL		 6160static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6161{
6162 struct nfs4_reclaim_complete_data *calldata = data;
6163 struct nfs_client *clp = calldata->clp;
6164 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6165
6166 dprintk("--> %s\n", __func__);
14516c3a
TM		 6167 if (!nfs41_sequence_done(task, res))
6168 return;
fce5c838 6169
aa5190d0
TM		 6170 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6171 rpc_restart_call_prepare(task);
6172 return;
6173 }
fce5c838
RL		 6174 dprintk("<-- %s\n", __func__);
6175}
6176
6177static void nfs4_free_reclaim_complete_data(void *data)
6178{
6179 struct nfs4_reclaim_complete_data *calldata = data;
6180
6181 kfree(calldata);
6182}
6183
6184static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6185 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6186 .rpc_call_done = nfs4_reclaim_complete_done,
6187 .rpc_release = nfs4_free_reclaim_complete_data,
6188};
6189
6190/*
6191 * Issue a global reclaim complete.
6192 */
6193static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6194{
6195 struct nfs4_reclaim_complete_data *calldata;
6196 struct rpc_task *task;
6197 struct rpc_message msg = {
6198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6199 };
6200 struct rpc_task_setup task_setup_data = {
6201 .rpc_client = clp->cl_rpcclient,
6202 .rpc_message = &msg,
6203 .callback_ops = &nfs4_reclaim_complete_call_ops,
6204 .flags = RPC_TASK_ASYNC,
6205 };
6206 int status = -ENOMEM;
6207
6208 dprintk("--> %s\n", __func__);
8535b2be 6209 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6210 if (calldata == NULL)
6211 goto out;
6212 calldata->clp = clp;
6213 calldata->arg.one_fs = 0;
fce5c838 6214
9d12b216 6215 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6216 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6217 msg.rpc_argp = &calldata->arg;
6218 msg.rpc_resp = &calldata->res;
6219 task_setup_data.callback_data = calldata;
6220 task = rpc_run_task(&task_setup_data);
acf82b85 6221 if (IS_ERR(task)) {
fce5c838 6222 status = PTR_ERR(task);
acf82b85
DC		 6223 goto out;
6224 }
c34c32ea
AA		 6225 status = nfs4_wait_for_completion_rpc_task(task);
6226 if (status == 0)
6227 status = task->tk_status;
fce5c838 6228 rpc_put_task(task);
acf82b85 6229 return 0;
fce5c838
RL		 6230out:
6231 dprintk("<-- %s status=%d\n", __func__, status);
6232 return status;
6233}
b1f69b75
AA		 6234
6235static void
6236nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6237{
6238 struct nfs4_layoutget *lgp = calldata;
c31663d4 6239 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6240 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6241
6242 dprintk("--> %s\n", __func__);
c31663d4
FI		 6243 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6244 * right now covering the LAYOUTGET we are about to send.
6245 * However, that is not so catastrophic, and there seems
6246 * to be no way to prevent it completely.
6247 */
6ba7db34 6248 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6249 &lgp->res.seq_res, task))
b1f69b75 6250 return;
cf7d63f1
FI		 6251 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6252 NFS_I(lgp->args.inode)->layout,
6253 lgp->args.ctx->state)) {
6254 rpc_exit(task, NFS4_OK);
cf7d63f1 6255 }
b1f69b75
AA		 6256}
6257
6258static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6259{
6260 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6261 struct inode *inode = lgp->args.inode;
6262 struct nfs_server *server = NFS_SERVER(inode);
6263 struct pnfs_layout_hdr *lo;
6264 struct nfs4_state *state = NULL;
305a7c62 6265 unsigned long timeo, now, giveup;
b1f69b75 6266
305a7c62 6267 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 6268
6ba7db34 6269 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6270 goto out;
b1f69b75
AA		 6271
6272 switch (task->tk_status) {
6273 case 0:
ee314c2a 6274 goto out;
305a7c62
BH		 6275 /*
6276 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
6277 * (or clients) writing to the same RAID stripe
6278 */
b1f69b75 6279 case -NFS4ERR_LAYOUTTRYLATER:
305a7c62
BH		 6280 /*
6281 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
6282 * existing layout before getting a new one).
6283 */
b1f69b75 6284 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6285 timeo = rpc_get_timeout(task->tk_client);
6286 giveup = lgp->args.timestamp + timeo;
305a7c62
BH		 6287 now = jiffies;
6288 if (time_after(giveup, now)) {
6289 unsigned long delay;
6290
6291 /* Delay for:
6292 * - Not less then NFS4_POLL_RETRY_MIN.
6293 * - One last time a jiffie before we give up
6294 * - exponential backoff (time_now minus start_attempt)
6295 */
6296 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
6297 min((giveup - now - 1),
6298 now - lgp->args.timestamp));
6299
6300 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
6301 __func__, delay);
6302 rpc_delay(task, delay);
6303 task->tk_status = 0;
6304 rpc_restart_call_prepare(task);
6305 goto out; /* Do not call nfs4_async_handle_error() */
6306 }
ee314c2a
TM		 6307 break;
6308 case -NFS4ERR_EXPIRED:
6309 case -NFS4ERR_BAD_STATEID:
6310 spin_lock(&inode->i_lock);
6311 lo = NFS_I(inode)->layout;
6312 if (!lo || list_empty(&lo->plh_segs)) {
6313 spin_unlock(&inode->i_lock);
6314 /* If the open stateid was bad, then recover it. */
6315 state = lgp->args.ctx->state;
6316 } else {
6317 LIST_HEAD(head);
6318
6319 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6320 spin_unlock(&inode->i_lock);
6321 /* Mark the bad layout state as invalid, then
6322 * retry using the open stateid. */
6323 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6324 }
6325 }
ee314c2a
TM		 6326 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6327 rpc_restart_call_prepare(task);
6328out:
b1f69b75
AA		 6329 dprintk("<-- %s\n", __func__);
6330}
6331
8554116e
IK		 6332static size_t max_response_pages(struct nfs_server *server)
6333{
6334 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6335 return nfs_page_array_len(0, max_resp_sz);
6336}
6337
6338static void nfs4_free_pages(struct page **pages, size_t size)
6339{
6340 int i;
6341
6342 if (!pages)
6343 return;
6344
6345 for (i = 0; i < size; i++) {
6346 if (!pages[i])
6347 break;
6348 __free_page(pages[i]);
6349 }
6350 kfree(pages);
6351}
6352
6353static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6354{
6355 struct page **pages;
6356 int i;
6357
6358 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6359 if (!pages) {
6360 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6361 return NULL;
6362 }
6363
6364 for (i = 0; i < size; i++) {
6365 pages[i] = alloc_page(gfp_flags);
6366 if (!pages[i]) {
6367 dprintk("%s: failed to allocate page\n", __func__);
6368 nfs4_free_pages(pages, size);
6369 return NULL;
6370 }
6371 }
6372
6373 return pages;
6374}
6375
b1f69b75
AA		 6376static void nfs4_layoutget_release(void *calldata)
6377{
6378 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6379 struct inode *inode = lgp->args.inode;
6380 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6381 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6382
6383 dprintk("--> %s\n", __func__);
8554116e 6384 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6385 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6386 put_nfs_open_context(lgp->args.ctx);
6387 kfree(calldata);
6388 dprintk("<-- %s\n", __func__);
6389}
6390
6391static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6392 .rpc_call_prepare = nfs4_layoutget_prepare,
6393 .rpc_call_done = nfs4_layoutget_done,
6394 .rpc_release = nfs4_layoutget_release,
6395};
6396
a0b0a6e3
TM		 6397struct pnfs_layout_segment *
6398nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6399{
a47970ff
WAA		 6400 struct inode *inode = lgp->args.inode;
6401 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6402 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6403 struct rpc_task *task;
6404 struct rpc_message msg = {
6405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6406 .rpc_argp = &lgp->args,
6407 .rpc_resp = &lgp->res,
6408 };
6409 struct rpc_task_setup task_setup_data = {
6410 .rpc_client = server->client,
6411 .rpc_message = &msg,
6412 .callback_ops = &nfs4_layoutget_call_ops,
6413 .callback_data = lgp,
6414 .flags = RPC_TASK_ASYNC,
6415 };
a0b0a6e3 6416 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6417 int status = 0;
6418
6419 dprintk("--> %s\n", __func__);
6420
f30d637d
PT		 6421 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6422 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6423
8554116e
IK		 6424 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6425 if (!lgp->args.layout.pages) {
6426 nfs4_layoutget_release(lgp);
a0b0a6e3 6427 return ERR_PTR(-ENOMEM);
8554116e
IK		 6428 }
6429 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6430 lgp->args.timestamp = jiffies;
8554116e 6431
35124a09 6432 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6433 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6434 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 6435
b1f69b75
AA		 6436 task = rpc_run_task(&task_setup_data);
6437 if (IS_ERR(task))
a0b0a6e3 6438 return ERR_CAST(task);
b1f69b75 6439 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6440 if (status == 0)
6441 status = task->tk_status;
085b7a45
WAA		 6442 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6443 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6444 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6445 rpc_put_task(task);
6446 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6447 if (status)
6448 return ERR_PTR(status);
6449 return lseg;
b1f69b75
AA		 6450}
6451
cbe82603
BH		 6452static void
6453nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6454{
6455 struct nfs4_layoutreturn *lrp = calldata;
6456
6457 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6458 nfs41_setup_sequence(lrp->clp->cl_session,
6459 &lrp->args.seq_args,
6460 &lrp->res.seq_res,
6461 task);
cbe82603
BH		 6462}
6463
6464static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6465{
6466 struct nfs4_layoutreturn *lrp = calldata;
6467 struct nfs_server *server;
6468
6469 dprintk("--> %s\n", __func__);
6470
6ba7db34 6471 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6472 return;
6473
6474 server = NFS_SERVER(lrp->args.inode);
6475 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6476 rpc_restart_call_prepare(task);
cbe82603
BH		 6477 return;
6478 }
cbe82603
BH		 6479 dprintk("<-- %s\n", __func__);
6480}
6481
6482static void nfs4_layoutreturn_release(void *calldata)
6483{
6484 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6485 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6486
6487 dprintk("--> %s\n", __func__);
849b286f
TM		 6488 spin_lock(&lo->plh_inode->i_lock);
6489 if (lrp->res.lrs_present)
6490 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6491 lo->plh_block_lgets--;
6492 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6493 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6494 kfree(calldata);
6495 dprintk("<-- %s\n", __func__);
6496}
6497
6498static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6499 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6500 .rpc_call_done = nfs4_layoutreturn_done,
6501 .rpc_release = nfs4_layoutreturn_release,
6502};
6503
6504int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6505{
6506 struct rpc_task *task;
6507 struct rpc_message msg = {
6508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6509 .rpc_argp = &lrp->args,
6510 .rpc_resp = &lrp->res,
6511 };
6512 struct rpc_task_setup task_setup_data = {
6513 .rpc_client = lrp->clp->cl_rpcclient,
6514 .rpc_message = &msg,
6515 .callback_ops = &nfs4_layoutreturn_call_ops,
6516 .callback_data = lrp,
6517 };
6518 int status;
6519
6520 dprintk("--> %s\n", __func__);
9d12b216 6521 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6522 task = rpc_run_task(&task_setup_data);
6523 if (IS_ERR(task))
6524 return PTR_ERR(task);
6525 status = task->tk_status;
6526 dprintk("<-- %s status=%d\n", __func__, status);
6527 rpc_put_task(task);
6528 return status;
6529}
6530
7f11d8d3
AA		 6531/*
6532 * Retrieve the list of Data Server devices from the MDS.
6533 */
6534static int _nfs4_getdevicelist(struct nfs_server *server,
6535 const struct nfs_fh *fh,
6536 struct pnfs_devicelist *devlist)
6537{
6538 struct nfs4_getdevicelist_args args = {
6539 .fh = fh,
6540 .layoutclass = server->pnfs_curr_ld->id,
6541 };
6542 struct nfs4_getdevicelist_res res = {
6543 .devlist = devlist,
6544 };
6545 struct rpc_message msg = {
6546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6547 .rpc_argp = &args,
6548 .rpc_resp = &res,
6549 };
6550 int status;
6551
6552 dprintk("--> %s\n", __func__);
6553 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6554 &res.seq_res, 0);
6555 dprintk("<-- %s status=%d\n", __func__, status);
6556 return status;
6557}
6558
6559int nfs4_proc_getdevicelist(struct nfs_server *server,
6560 const struct nfs_fh *fh,
6561 struct pnfs_devicelist *devlist)
6562{
6563 struct nfs4_exception exception = { };
6564 int err;
6565
6566 do {
6567 err = nfs4_handle_exception(server,
6568 _nfs4_getdevicelist(server, fh, devlist),
6569 &exception);
6570 } while (exception.retry);
6571
6572 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6573 err, devlist->num_devs);
6574
6575 return err;
6576}
6577EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6578
b1f69b75
AA		 6579static int
6580_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6581{
6582 struct nfs4_getdeviceinfo_args args = {
6583 .pdev = pdev,
6584 };
6585 struct nfs4_getdeviceinfo_res res = {
6586 .pdev = pdev,
6587 };
6588 struct rpc_message msg = {
6589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6590 .rpc_argp = &args,
6591 .rpc_resp = &res,
6592 };
6593 int status;
6594
6595 dprintk("--> %s\n", __func__);
7c513058 6596 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6597 dprintk("<-- %s status=%d\n", __func__, status);
6598
6599 return status;
6600}
6601
6602int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6603{
6604 struct nfs4_exception exception = { };
6605 int err;
6606
6607 do {
6608 err = nfs4_handle_exception(server,
6609 _nfs4_proc_getdeviceinfo(server, pdev),
6610 &exception);
6611 } while (exception.retry);
6612 return err;
6613}
6614EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6615
863a3c6c
AA		 6616static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6617{
6618 struct nfs4_layoutcommit_data *data = calldata;
6619 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6620 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6621
d9afbd1b
TM		 6622 nfs41_setup_sequence(session,
6623 &data->args.seq_args,
6624 &data->res.seq_res,
6625 task);
863a3c6c
AA		 6626}
6627
6628static void
6629nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6630{
6631 struct nfs4_layoutcommit_data *data = calldata;
6632 struct nfs_server *server = NFS_SERVER(data->args.inode);
6633
6ba7db34 6634 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6635 return;
6636
6637 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6638 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6639 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6640 case -NFS4ERR_BADLAYOUT: /* no layout */
6641 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6642 task->tk_status = 0;
e59d27e0
TM		 6643 break;
6644 case 0:
863a3c6c
AA		 6645 nfs_post_op_update_inode_force_wcc(data->args.inode,
6646 data->res.fattr);
e59d27e0
TM		 6647 break;
6648 default:
6649 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6650 rpc_restart_call_prepare(task);
6651 return;
6652 }
6653 }
863a3c6c
AA		 6654}
6655
6656static void nfs4_layoutcommit_release(void *calldata)
6657{
6658 struct nfs4_layoutcommit_data *data = calldata;
6659
db29c089 6660 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6661 put_rpccred(data->cred);
6662 kfree(data);
6663}
6664
6665static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6666 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6667 .rpc_call_done = nfs4_layoutcommit_done,
6668 .rpc_release = nfs4_layoutcommit_release,
6669};
6670
6671int
ef311537 6672nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6673{
6674 struct rpc_message msg = {
6675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6676 .rpc_argp = &data->args,
6677 .rpc_resp = &data->res,
6678 .rpc_cred = data->cred,
6679 };
6680 struct rpc_task_setup task_setup_data = {
6681 .task = &data->task,
6682 .rpc_client = NFS_CLIENT(data->args.inode),
6683 .rpc_message = &msg,
6684 .callback_ops = &nfs4_layoutcommit_ops,
6685 .callback_data = data,
6686 .flags = RPC_TASK_ASYNC,
6687 };
6688 struct rpc_task *task;
6689 int status = 0;
6690
6691 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6692 "lbw: %llu inode %lu\n",
6693 data->task.tk_pid, sync,
6694 data->args.lastbytewritten,
6695 data->args.inode->i_ino);
6696
9d12b216 6697 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6698 task = rpc_run_task(&task_setup_data);
6699 if (IS_ERR(task))
6700 return PTR_ERR(task);
ef311537 6701 if (sync == false)
863a3c6c
AA		 6702 goto out;
6703 status = nfs4_wait_for_completion_rpc_task(task);
6704 if (status != 0)
6705 goto out;
6706 status = task->tk_status;
6707out:
6708 dprintk("%s: status %d\n", __func__, status);
6709 rpc_put_task(task);
6710 return status;
6711}
fca78d6d
BS		 6712
6713static int
6714_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6715 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6716{
6717 struct nfs41_secinfo_no_name_args args = {
6718 .style = SECINFO_STYLE_CURRENT_FH,
6719 };
6720 struct nfs4_secinfo_res res = {
6721 .flavors = flavors,
6722 };
6723 struct rpc_message msg = {
6724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6725 .rpc_argp = &args,
6726 .rpc_resp = &res,
6727 };
6728 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6729}
6730
6731static int
6732nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6733 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6734{
6735 struct nfs4_exception exception = { };
6736 int err;
6737 do {
6738 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6739 switch (err) {
6740 case 0:
6741 case -NFS4ERR_WRONGSEC:
c1942219 6742 case -ENOTSUPP:
05e9cfb4 6743 goto out;
fca78d6d
BS		 6744 default:
6745 err = nfs4_handle_exception(server, err, &exception);
6746 }
6747 } while (exception.retry);
05e9cfb4 6748out:
fca78d6d
BS		 6749 return err;
6750}
6751
6752static int
6753nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6754 struct nfs_fsinfo *info)
6755{
6756 int err;
6757 struct page *page;
6758 rpc_authflavor_t flavor;
6759 struct nfs4_secinfo_flavors *flavors;
6760
6761 page = alloc_page(GFP_KERNEL);
6762 if (!page) {
6763 err = -ENOMEM;
6764 goto out;
6765 }
6766
6767 flavors = page_address(page);
6768 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6769
6770 /*
6771 * Fall back on "guess and check" method if
6772 * the server doesn't support SECINFO_NO_NAME
6773 */
c1942219 6774 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 6775 err = nfs4_find_root_sec(server, fhandle, info);
6776 goto out_freepage;
6777 }
6778 if (err)
6779 goto out_freepage;
6780
6781 flavor = nfs_find_best_sec(flavors);
6782 if (err == 0)
6783 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6784
6785out_freepage:
6786 put_page(page);
6787 if (err == -EACCES)
6788 return -EPERM;
6789out:
6790 return err;
6791}
1cab0652
BS		 6792
6793static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6794{
6795 int status;
6796 struct nfs41_test_stateid_args args = {
1cab0652 6797 .stateid = stateid,
7d974794
BS		 6798 };
6799 struct nfs41_test_stateid_res res;
6800 struct rpc_message msg = {
6801 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6802 .rpc_argp = &args,
6803 .rpc_resp = &res,
6804 };
1cab0652 6805
38527b15 6806 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6807 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6808 nfs4_set_sequence_privileged(&args.seq_args);
6809 status = nfs4_call_sync_sequence(server->client, server, &msg,
6810 &args.seq_args, &res.seq_res);
38527b15
CL		 6811 if (status != NFS_OK) {
6812 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6813 return status;
38527b15
CL		 6814 }
6815 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6816 return -res.status;
7d974794
BS		 6817}
6818
38527b15
CL		 6819/**
6820 * nfs41_test_stateid - perform a TEST_STATEID operation
6821 *
6822 * @server: server / transport on which to perform the operation
6823 * @stateid: state ID to test
6824 *
6825 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6826 * Otherwise a negative NFS4ERR value is returned if the operation
6827 * failed or the state ID is not currently valid.
6828 */
1cab0652 6829static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6830{
6831 struct nfs4_exception exception = { };
6832 int err;
6833 do {
377e507d
CL		 6834 err = _nfs41_test_stateid(server, stateid);
6835 if (err != -NFS4ERR_DELAY)
6836 break;
6837 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6838 } while (exception.retry);
6839 return err;
6840}
9aeda35f 6841
7c1d5fae
TM		 6842struct nfs_free_stateid_data {
6843 struct nfs_server *server;
6844 struct nfs41_free_stateid_args args;
9aeda35f 6845 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 6846};
6847
6848static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
6849{
6850 struct nfs_free_stateid_data *data = calldata;
6851 nfs41_setup_sequence(nfs4_get_session(data->server),
6852 &data->args.seq_args,
6853 &data->res.seq_res,
6854 task);
6855}
6856
6857static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
6858{
6859 struct nfs_free_stateid_data *data = calldata;
6860
6861 nfs41_sequence_done(task, &data->res.seq_res);
6862
6863 switch (task->tk_status) {
6864 case -NFS4ERR_DELAY:
6865 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
6866 rpc_restart_call_prepare(task);
6867 }
6868}
6869
6870static void nfs41_free_stateid_release(void *calldata)
6871{
6872 kfree(calldata);
6873}
6874
6875const struct rpc_call_ops nfs41_free_stateid_ops = {
6876 .rpc_call_prepare = nfs41_free_stateid_prepare,
6877 .rpc_call_done = nfs41_free_stateid_done,
6878 .rpc_release = nfs41_free_stateid_release,
6879};
6880
6881static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
6882 nfs4_stateid *stateid,
6883 bool privileged)
6884{
9aeda35f
BS		 6885 struct rpc_message msg = {
6886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9aeda35f 6887 };
7c1d5fae
TM		 6888 struct rpc_task_setup task_setup = {
6889 .rpc_client = server->client,
6890 .rpc_message = &msg,
6891 .callback_ops = &nfs41_free_stateid_ops,
6892 .flags = RPC_TASK_ASYNC,
6893 };
6894 struct nfs_free_stateid_data *data;
9aeda35f 6895
38527b15 6896 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 6897 data = kmalloc(sizeof(*data), GFP_NOFS);
6898 if (!data)
6899 return ERR_PTR(-ENOMEM);
6900 data->server = server;
6901 nfs4_stateid_copy(&data->args.stateid, stateid);
6902
6903 task_setup.callback_data = data;
6904
6905 msg.rpc_argp = &data->args;
6906 msg.rpc_resp = &data->res;
6907 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6908 if (privileged)
6909 nfs4_set_sequence_privileged(&data->args.seq_args);
6910
6911 return rpc_run_task(&task_setup);
9aeda35f
BS		 6912}
6913
38527b15
CL		 6914/**
6915 * nfs41_free_stateid - perform a FREE_STATEID operation
6916 *
6917 * @server: server / transport on which to perform the operation
6918 * @stateid: state ID to release
6919 *
6920 * Returns NFS_OK if the server freed "stateid". Otherwise a
6921 * negative NFS4ERR value is returned.
6922 */
1cab0652 6923static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6924{
7c1d5fae
TM		 6925 struct rpc_task *task;
6926 int ret;
6927
6928 task = _nfs41_free_stateid(server, stateid, true);
6929 if (IS_ERR(task))
6930 return PTR_ERR(task);
6931 ret = rpc_wait_for_completion_task(task);
6932 if (!ret)
6933 ret = task->tk_status;
6934 rpc_put_task(task);
6935 return ret;
9aeda35f 6936}
36281caa 6937
c8b2d0bf
TM		 6938static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
6939{
6940 struct rpc_task *task;
6941
6942 task = _nfs41_free_stateid(server, &lsp->ls_stateid, false);
6943 nfs4_free_lock_state(server, lsp);
6944 if (IS_ERR(task))
6945 return PTR_ERR(task);
6946 rpc_put_task(task);
6947 return 0;
6948}
6949
36281caa
TM		 6950static bool nfs41_match_stateid(const nfs4_stateid *s1,
6951 const nfs4_stateid *s2)
6952{
2d2f24ad 6953 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6954 return false;
6955
2d2f24ad 6956 if (s1->seqid == s2->seqid)
36281caa 6957 return true;
2d2f24ad 6958 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6959 return true;
6960
6961 return false;
6962}
6963
557134a3
AA		 6964#endif /* CONFIG_NFS_V4_1 */
6965
36281caa
TM		 6966static bool nfs4_match_stateid(const nfs4_stateid *s1,
6967 const nfs4_stateid *s2)
6968{
f597c537 6969 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6970}
6971
6972
17280175 6973static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6974 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6975 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6976 .recover_open = nfs4_open_reclaim,
6977 .recover_lock = nfs4_lock_reclaim,
591d71cb 6978 .establish_clid = nfs4_init_clientid,
90a16617 6979 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6980 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6981};
6982
591d71cb 6983#if defined(CONFIG_NFS_V4_1)
17280175 6984static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6985 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6986 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6987 .recover_open = nfs4_open_reclaim,
6988 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6989 .establish_clid = nfs41_init_clientid,
b4b82607 6990 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6991 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6992 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6993};
6994#endif /* CONFIG_NFS_V4_1 */
6995
17280175 6996static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6997 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6998 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
361eeee7 6999 .recover_open = nfs40_open_expired,
591d71cb
AA		 7000 .recover_lock = nfs4_lock_expired,
7001 .establish_clid = nfs4_init_clientid,
90a16617 7002 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 7003};
7004
7005#if defined(CONFIG_NFS_V4_1)
17280175 7006static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7007 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7008 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7009 .recover_open = nfs41_open_expired,
7010 .recover_lock = nfs41_lock_expired,
4d643d1d 7011 .establish_clid = nfs41_init_clientid,
b4b82607 7012 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 7013};
591d71cb 7014#endif /* CONFIG_NFS_V4_1 */
1da177e4 7015
17280175 7016static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7017 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7018 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7019 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7020};
7021
7022#if defined(CONFIG_NFS_V4_1)
17280175 7023static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7024 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7025 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7026 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7027};
7028#endif
7029
97dc1359
TM		 7030static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7031 .minor_version = 0,
39c6daae
TM		 7032 .init_caps = NFS_CAP_READDIRPLUS
7033 | NFS_CAP_ATOMIC_OPEN
7034 | NFS_CAP_CHANGE_ATTR
7035 | NFS_CAP_POSIX_LOCK,
97dc1359 7036 .call_sync = _nfs4_call_sync,
36281caa 7037 .match_stateid = nfs4_match_stateid,
fca78d6d 7038 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7039 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7040 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7041 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7042 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7043};
7044
7045#if defined(CONFIG_NFS_V4_1)
7046static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7047 .minor_version = 1,
39c6daae
TM		 7048 .init_caps = NFS_CAP_READDIRPLUS
7049 | NFS_CAP_ATOMIC_OPEN
7050 | NFS_CAP_CHANGE_ATTR
3b66486c 7051 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7052 | NFS_CAP_STATEID_NFSV41
7053 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7054 .call_sync = nfs4_call_sync_sequence,
36281caa 7055 .match_stateid = nfs41_match_stateid,
fca78d6d 7056 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7057 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7058 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7059 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7060 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7061};
7062#endif
7063
97dc1359
TM		 7064const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7065 [0] = &nfs_v4_0_minor_ops,
7066#if defined(CONFIG_NFS_V4_1)
7067 [1] = &nfs_v4_1_minor_ops,
7068#endif
7069};
7070
73a79706
BS		 7071const struct inode_operations nfs4_dir_inode_operations = {
7072 .create = nfs_create,
7073 .lookup = nfs_lookup,
7074 .atomic_open = nfs_atomic_open,
7075 .link = nfs_link,
7076 .unlink = nfs_unlink,
7077 .symlink = nfs_symlink,
7078 .mkdir = nfs_mkdir,
7079 .rmdir = nfs_rmdir,
7080 .mknod = nfs_mknod,
7081 .rename = nfs_rename,
7082 .permission = nfs_permission,
7083 .getattr = nfs_getattr,
7084 .setattr = nfs_setattr,
7085 .getxattr = generic_getxattr,
7086 .setxattr = generic_setxattr,
7087 .listxattr = generic_listxattr,
7088 .removexattr = generic_removexattr,
7089};
7090
92e1d5be 7091static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7092 .permission = nfs_permission,
7093 .getattr = nfs_getattr,
7094 .setattr = nfs_setattr,
64c2ce8b
AK		 7095 .getxattr = generic_getxattr,
7096 .setxattr = generic_setxattr,
7097 .listxattr = generic_listxattr,
7098 .removexattr = generic_removexattr,
6b3b5496
BF		 7099};
7100
509de811 7101const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7102 .version = 4, /* protocol version */
7103 .dentry_ops = &nfs4_dentry_operations,
7104 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7105 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7106 .file_ops = &nfs4_file_operations,
1da177e4 7107 .getroot = nfs4_proc_get_root,
281cad46 7108 .submount = nfs4_submount,
ff9099f2 7109 .try_mount = nfs4_try_mount,
1da177e4
LT		 7110 .getattr = nfs4_proc_getattr,
7111 .setattr = nfs4_proc_setattr,
7112 .lookup = nfs4_proc_lookup,
7113 .access = nfs4_proc_access,
7114 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7115 .create = nfs4_proc_create,
7116 .remove = nfs4_proc_remove,
7117 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7118 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7119 .unlink_done = nfs4_proc_unlink_done,
7120 .rename = nfs4_proc_rename,
d3d4152a 7121 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7122 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7123 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7124 .link = nfs4_proc_link,
7125 .symlink = nfs4_proc_symlink,
7126 .mkdir = nfs4_proc_mkdir,
7127 .rmdir = nfs4_proc_remove,
7128 .readdir = nfs4_proc_readdir,
7129 .mknod = nfs4_proc_mknod,
7130 .statfs = nfs4_proc_statfs,
7131 .fsinfo = nfs4_proc_fsinfo,
7132 .pathconf = nfs4_proc_pathconf,
e9326dca 7133 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7134 .decode_dirent = nfs4_decode_dirent,
7135 .read_setup = nfs4_proc_read_setup,
1abb5088 7136 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7137 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7138 .read_done = nfs4_read_done,
1da177e4 7139 .write_setup = nfs4_proc_write_setup,
57208fa7 7140 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7141 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7142 .write_done = nfs4_write_done,
1da177e4 7143 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7144 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7145 .commit_done = nfs4_commit_done,
1da177e4 7146 .lock = nfs4_proc_lock,
e50a1c2e 7147 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7148 .close_context = nfs4_close_context,
2b484297 7149 .open_context = nfs4_atomic_open,
011e2a7f 7150 .have_delegation = nfs4_have_delegation,
57ec14c5 7151 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7152 .alloc_client = nfs4_alloc_client,
45a52a02 7153 .init_client = nfs4_init_client,
cdb7eced 7154 .free_client = nfs4_free_client,
1179acc6
BS		 7155 .create_server = nfs4_create_server,
7156 .clone_server = nfs_clone_server,
1da177e4
LT		 7157};
7158
64c2ce8b
AK		 7159static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7160 .prefix = XATTR_NAME_NFSV4_ACL,
7161 .list = nfs4_xattr_list_nfs4_acl,
7162 .get = nfs4_xattr_get_nfs4_acl,
7163 .set = nfs4_xattr_set_nfs4_acl,
7164};
7165
7166const struct xattr_handler *nfs4_xattr_handlers[] = {
7167 &nfs4_xattr_nfs4_acl_handler,
7168 NULL
7169};
7170
1da177e4
LT		 7171/*
7172 * Local variables:
7173 * c-basic-offset: 8
7174 * End:
7175 */
kernel source for telekom puls (alcatel/mediatek)