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NFS:Add labels to client function prototypes
[mirror_ubuntu-hirsute-kernel.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);
1775fd3e
DQ		 80static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
81static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 82static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 84 struct nfs4_state *state, struct nfs4_label *ilabel,
85 struct nfs4_label *olabel);
f062eb6c 86#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 89#endif
1da177e4 90/* Prevent leaks of NFSv4 errors into userland */
46f72f57 91static int nfs4_map_errors(int err)
1da177e4 92{
52567b03
TM		 93 if (err >= -1000)
94 return err;
95 switch (err) {
96 case -NFS4ERR_RESOURCE:
30005121
WAA		 97 case -NFS4ERR_LAYOUTTRYLATER:
98 case -NFS4ERR_RECALLCONFLICT:
52567b03 99 return -EREMOTEIO;
7ebb9315
BS		 100 case -NFS4ERR_WRONGSEC:
101 return -EPERM;
3ddeb7c5
TM		 102 case -NFS4ERR_BADOWNER:
103 case -NFS4ERR_BADNAME:
104 return -EINVAL;
fb13bfa7
TM		 105 case -NFS4ERR_SHARE_DENIED:
106 return -EACCES;
f25efd85
SD		 107 case -NFS4ERR_MINOR_VERS_MISMATCH:
108 return -EPROTONOSUPPORT;
6168f62c
WAA		 109 case -NFS4ERR_ACCESS:
110 return -EACCES;
6e3cf241
TM		 111 case -NFS4ERR_FILE_OPEN:
112 return -EBUSY;
52567b03 113 default:
1da177e4 114 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 115 __func__, -err);
52567b03 116 break;
1da177e4 117 }
52567b03 118 return -EIO;
1da177e4
LT		 119}
120
121/*
122 * This is our standard bitmap for GETATTR requests.
123 */
1549210f 124const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 125 FATTR4_WORD0_TYPE
126 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_SIZE
128 | FATTR4_WORD0_FSID
129 | FATTR4_WORD0_FILEID,
130 FATTR4_WORD1_MODE
131 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER
133 | FATTR4_WORD1_OWNER_GROUP
134 | FATTR4_WORD1_RAWDEV
135 | FATTR4_WORD1_SPACE_USED
136 | FATTR4_WORD1_TIME_ACCESS
137 | FATTR4_WORD1_TIME_METADATA
138 | FATTR4_WORD1_TIME_MODIFY
139};
140
1549210f
TM		 141static const u32 nfs4_pnfs_open_bitmap[3] = {
142 FATTR4_WORD0_TYPE
143 | FATTR4_WORD0_CHANGE
144 | FATTR4_WORD0_SIZE
145 | FATTR4_WORD0_FSID
146 | FATTR4_WORD0_FILEID,
147 FATTR4_WORD1_MODE
148 | FATTR4_WORD1_NUMLINKS
149 | FATTR4_WORD1_OWNER
150 | FATTR4_WORD1_OWNER_GROUP
151 | FATTR4_WORD1_RAWDEV
152 | FATTR4_WORD1_SPACE_USED
153 | FATTR4_WORD1_TIME_ACCESS
154 | FATTR4_WORD1_TIME_METADATA
155 | FATTR4_WORD1_TIME_MODIFY,
156 FATTR4_WORD2_MDSTHRESHOLD
157};
158
e23008ec
AA		 159static const u32 nfs4_open_noattr_bitmap[3] = {
160 FATTR4_WORD0_TYPE
161 | FATTR4_WORD0_CHANGE
162 | FATTR4_WORD0_FILEID,
163};
164
a09df2ca 165const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 166 FATTR4_WORD0_FILES_AVAIL
167 | FATTR4_WORD0_FILES_FREE
168 | FATTR4_WORD0_FILES_TOTAL,
169 FATTR4_WORD1_SPACE_AVAIL
170 | FATTR4_WORD1_SPACE_FREE
171 | FATTR4_WORD1_SPACE_TOTAL
172};
173
a09df2ca 174const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 175 FATTR4_WORD0_MAXLINK
176 | FATTR4_WORD0_MAXNAME,
177 0
178};
179
dae100c2 180const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 181 | FATTR4_WORD0_MAXREAD
182 | FATTR4_WORD0_MAXWRITE
183 | FATTR4_WORD0_LEASE_TIME,
55b6e774 184 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 185 | FATTR4_WORD1_FS_LAYOUT_TYPES,
186 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 187};
188
a09df2ca 189const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 190 FATTR4_WORD0_TYPE
191 | FATTR4_WORD0_CHANGE
192 | FATTR4_WORD0_SIZE
193 | FATTR4_WORD0_FSID
194 | FATTR4_WORD0_FILEID
195 | FATTR4_WORD0_FS_LOCATIONS,
196 FATTR4_WORD1_MODE
197 | FATTR4_WORD1_NUMLINKS
198 | FATTR4_WORD1_OWNER
199 | FATTR4_WORD1_OWNER_GROUP
200 | FATTR4_WORD1_RAWDEV
201 | FATTR4_WORD1_SPACE_USED
202 | FATTR4_WORD1_TIME_ACCESS
203 | FATTR4_WORD1_TIME_METADATA
204 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 205 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 206};
207
bc4785cd 208static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 209 struct nfs4_readdir_arg *readdir)
210{
0dbb4c67 211 __be32 *start, *p;
1da177e4 212
1da177e4 213 if (cookie > 2) {
b7ef1956 214 readdir->cookie = cookie;
1da177e4
LT		 215 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
216 return;
217 }
218
219 readdir->cookie = 0;
220 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
221 if (cookie == 2)
222 return;
223
224 /*
225 * NFSv4 servers do not return entries for '.' and '..'
226 * Therefore, we fake these entries here. We let '.'
227 * have cookie 0 and '..' have cookie 1. Note that
228 * when talking to the server, we always send cookie 0
229 * instead of 1 or 2.
230 */
2b86ce2d 231 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 232
233 if (cookie == 0) {
234 *p++ = xdr_one; /* next */
235 *p++ = xdr_zero; /* cookie, first word */
236 *p++ = xdr_one; /* cookie, second word */
237 *p++ = xdr_one; /* entry len */
238 memcpy(p, ".\0\0\0", 4); /* entry */
239 p++;
240 *p++ = xdr_one; /* bitmap length */
241 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
242 *p++ = htonl(8); /* attribute buffer length */
4e769b93 243 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 244 }
245
246 *p++ = xdr_one; /* next */
247 *p++ = xdr_zero; /* cookie, first word */
248 *p++ = xdr_two; /* cookie, second word */
249 *p++ = xdr_two; /* entry len */
250 memcpy(p, "..\0\0", 4); /* entry */
251 p++;
252 *p++ = xdr_one; /* bitmap length */
253 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
254 *p++ = htonl(8); /* attribute buffer length */
4e769b93 255 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 256
257 readdir->pgbase = (char *)p - (char *)start;
258 readdir->count -= readdir->pgbase;
2b86ce2d 259 kunmap_atomic(start);
1da177e4
LT		 260}
261
65de872e
TM		 262static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
263{
264 int res = 0;
265
266 might_sleep();
267
268 if (*timeout <= 0)
269 *timeout = NFS4_POLL_RETRY_MIN;
270 if (*timeout > NFS4_POLL_RETRY_MAX)
271 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 272 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 273 if (fatal_signal_pending(current))
274 res = -ERESTARTSYS;
275 *timeout <<= 1;
276 return res;
277}
278
279/* This is the error handling routine for processes that are allowed
280 * to sleep.
281 */
b064eca2 282static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 283{
284 struct nfs_client *clp = server->nfs_client;
9e33bed5 285 struct nfs4_state *state = exception->state;
3114ea7a 286 struct inode *inode = exception->inode;
65de872e
TM		 287 int ret = errorcode;
288
289 exception->retry = 0;
290 switch(errorcode) {
291 case 0:
292 return 0;
3114ea7a 293 case -NFS4ERR_OPENMODE:
011e2a7f 294 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 295 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 296 exception->retry = 1;
297 return 0;
298 }
299 if (state == NULL)
300 break;
5d422301
TM		 301 ret = nfs4_schedule_stateid_recovery(server, state);
302 if (ret < 0)
303 break;
3114ea7a 304 goto wait_on_recovery;
a1d0b5ee 305 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 306 case -NFS4ERR_ADMIN_REVOKED:
307 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 308 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
309 nfs_remove_bad_delegation(inode);
310 exception->retry = 1;
311 break;
312 }
9e33bed5
TM		 313 if (state == NULL)
314 break;
5d422301
TM		 315 ret = nfs4_schedule_stateid_recovery(server, state);
316 if (ret < 0)
317 break;
0400a6b0 318 goto wait_on_recovery;
0ced63d1 319 case -NFS4ERR_EXPIRED:
5d422301
TM		 320 if (state != NULL) {
321 ret = nfs4_schedule_stateid_recovery(server, state);
322 if (ret < 0)
323 break;
324 }
65de872e 325 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 326 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 327 nfs4_schedule_lease_recovery(clp);
328 goto wait_on_recovery;
03391693 329#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 330 case -NFS4ERR_BADSESSION:
331 case -NFS4ERR_BADSLOT:
332 case -NFS4ERR_BAD_HIGH_SLOT:
333 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
334 case -NFS4ERR_DEADSESSION:
335 case -NFS4ERR_SEQ_FALSE_RETRY:
336 case -NFS4ERR_SEQ_MISORDERED:
337 dprintk("%s ERROR: %d Reset session\n", __func__,
338 errorcode);
9f594791 339 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 340 goto wait_on_recovery;
03391693 341#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 342 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 343 if (exception->timeout > HZ) {
344 /* We have retried a decent amount, time to
345 * fail
346 */
347 ret = -EBUSY;
348 break;
349 }
65de872e
TM		 350 case -NFS4ERR_GRACE:
351 case -NFS4ERR_DELAY:
352 ret = nfs4_delay(server->client, &exception->timeout);
353 if (ret != 0)
354 break;
a8a4ae3a 355 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 356 case -NFS4ERR_OLD_STATEID:
357 exception->retry = 1;
b064eca2
TM		 358 break;
359 case -NFS4ERR_BADOWNER:
360 /* The following works around a Linux server bug! */
361 case -NFS4ERR_BADNAME:
362 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
363 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
364 exception->retry = 1;
365 printk(KERN_WARNING "NFS: v4 server %s "
366 "does not accept raw "
367 "uid/gids. "
368 "Reenabling the idmapper.\n",
369 server->nfs_client->cl_hostname);
370 }
65de872e
TM		 371 }
372 /* We failed to handle the error */
373 return nfs4_map_errors(ret);
0400a6b0 374wait_on_recovery:
a2c0b9e2
TM		 375 ret = nfs4_wait_clnt_recover(clp);
376 if (ret == 0)
377 exception->retry = 1;
378 return ret;
65de872e
TM		 379}
380
381
452e9352 382static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 383{
1da177e4
LT		 384 spin_lock(&clp->cl_lock);
385 if (time_before(clp->cl_last_renewal,timestamp))
386 clp->cl_last_renewal = timestamp;
387 spin_unlock(&clp->cl_lock);
388}
389
452e9352
TM		 390static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
391{
392 do_renew_lease(server->nfs_client, timestamp);
393}
394
cccef3b9
AA		 395#if defined(CONFIG_NFS_V4_1)
396
d185a334 397static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 398{
e3725ec0 399 struct nfs4_session *session;
13615871 400 struct nfs4_slot_table *tbl;
c10e4498 401 bool send_new_highest_used_slotid = false;
13615871 402
dfb4f309 403 if (!res->sr_slot) {
13615871
AA		 404 /* just wake up the next guy waiting since
405 * we may have not consumed a slot after all */
691daf3b 406 dprintk("%s: No slot\n", __func__);
35dc1d74 407 return;
13615871 408 }
e3725ec0
TM		 409 tbl = res->sr_slot->table;
410 session = tbl->session;
ea028ac9 411
35dc1d74 412 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 413 /* Be nice to the server: try to ensure that the last transmitted
414 * value for highest_user_slotid <= target_highest_slotid
415 */
416 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
417 send_new_highest_used_slotid = true;
418
b75ad4cd
TM		 419 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
420 send_new_highest_used_slotid = false;
421 goto out_unlock;
422 }
f4af6e2a 423 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 424
425 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
426 send_new_highest_used_slotid = false;
b75ad4cd 427out_unlock:
35dc1d74 428 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 429 res->sr_slot = NULL;
c10e4498
TM		 430 if (send_new_highest_used_slotid)
431 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 432}
433
14516c3a 434static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 435{
e3725ec0 436 struct nfs4_session *session;
933602e3 437 struct nfs4_slot *slot;
14516c3a 438 struct nfs_client *clp;
ac20d163 439 bool interrupted = false;
85563073 440 int ret = 1;
b0df806c 441
468f8613
BS		 442 /* don't increment the sequence number if the task wasn't sent */
443 if (!RPC_WAS_SENT(task))
b0df806c
AA		 444 goto out;
445
933602e3 446 slot = res->sr_slot;
e3725ec0 447 session = slot->table->session;
933602e3 448
ac20d163
TM		 449 if (slot->interrupted) {
450 slot->interrupted = 0;
451 interrupted = true;
452 }
453
691daf3b 454 /* Check the SEQUENCE operation status */
14516c3a
TM		 455 switch (res->sr_status) {
456 case 0:
b0df806c 457 /* Update the slot's sequence and clientid lease timer */
933602e3 458 ++slot->seq_nr;
e3725ec0 459 clp = session->clp;
8e63b6a8 460 do_renew_lease(clp, res->sr_timestamp);
0629e370 461 /* Check sequence flags */
b4410c2f
TM		 462 if (res->sr_status_flags != 0)
463 nfs4_schedule_lease_recovery(clp);
464ee9f9 464 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 465 break;
ac20d163
TM		 466 case 1:
467 /*
468 * sr_status remains 1 if an RPC level error occurred.
469 * The server may or may not have processed the sequence
470 * operation..
471 * Mark the slot as having hosted an interrupted RPC call.
472 */
473 slot->interrupted = 1;
474 goto out;
14516c3a
TM		 475 case -NFS4ERR_DELAY:
476 /* The server detected a resend of the RPC call and
477 * returned NFS4ERR_DELAY as per Section 2.10.6.2
478 * of RFC5661.
479 */
df2fabff 480 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 481 __func__,
df2fabff 482 slot->slot_nr,
933602e3 483 slot->seq_nr);
14516c3a 484 goto out_retry;
85563073
TM		 485 case -NFS4ERR_BADSLOT:
486 /*
487 * The slot id we used was probably retired. Try again
488 * using a different slot id.
489 */
e8794440
TM		 490 goto retry_nowait;
491 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 492 /*
493 * Was the last operation on this sequence interrupted?
494 * If so, retry after bumping the sequence number.
495 */
496 if (interrupted) {
497 ++slot->seq_nr;
498 goto retry_nowait;
499 }
e8794440
TM		 500 /*
501 * Could this slot have been previously retired?
502 * If so, then the server may be expecting seq_nr = 1!
503 */
8e63b6a8
TM		 504 if (slot->seq_nr != 1) {
505 slot->seq_nr = 1;
506 goto retry_nowait;
507 }
508 break;
e8794440
TM		 509 case -NFS4ERR_SEQ_FALSE_RETRY:
510 ++slot->seq_nr;
511 goto retry_nowait;
14516c3a
TM		 512 default:
513 /* Just update the slot sequence no. */
933602e3 514 ++slot->seq_nr;
b0df806c
AA		 515 }
516out:
517 /* The session may be reset by one of the error handlers. */
518 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 519 nfs41_sequence_free_slot(res);
85563073 520 return ret;
e8794440
TM		 521retry_nowait:
522 if (rpc_restart_call_prepare(task)) {
523 task->tk_status = 0;
524 ret = 0;
525 }
526 goto out;
14516c3a 527out_retry:
d05dd4e9 528 if (!rpc_restart_call(task))
14516c3a
TM		 529 goto out;
530 rpc_delay(task, NFS4_POLL_RETRY_MAX);
531 return 0;
b0df806c
AA		 532}
533
14516c3a
TM		 534static int nfs4_sequence_done(struct rpc_task *task,
535 struct nfs4_sequence_res *res)
df896455 536{
e3725ec0 537 if (res->sr_slot == NULL)
14516c3a
TM		 538 return 1;
539 return nfs41_sequence_done(task, res);
df896455
TM		 540}
541
9d12b216
TM		 542static void nfs41_init_sequence(struct nfs4_sequence_args *args,
543 struct nfs4_sequence_res *res, int cache_reply)
544{
2b2fa717 545 args->sa_slot = NULL;
9d12b216 546 args->sa_cache_this = 0;
8fe72bac 547 args->sa_privileged = 0;
9d12b216
TM		 548 if (cache_reply)
549 args->sa_cache_this = 1;
9d12b216
TM		 550 res->sr_slot = NULL;
551}
552
8fe72bac
TM		 553static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
554{
555 args->sa_privileged = 1;
556}
557
dc70d7b3 558int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 559 struct nfs4_sequence_args *args,
560 struct nfs4_sequence_res *res,
ce5039c1
AA		 561 struct rpc_task *task)
562{
fbcd4abc
AA		 563 struct nfs4_slot *slot;
564 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 565
566 dprintk("--> %s\n", __func__);
ce5039c1 567 /* slot already allocated? */
dfb4f309 568 if (res->sr_slot != NULL)
d9afbd1b 569 goto out_success;
ce5039c1 570
fbcd4abc
AA		 571 tbl = &session->fc_slot_table;
572
69d206b5
TM		 573 task->tk_timeout = 0;
574
fbcd4abc 575 spin_lock(&tbl->slot_tbl_lock);
a2118c33 576 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 577 !args->sa_privileged) {
0b1c8fc4 578 /* The state manager will wait until the slot table is empty */
0b1c8fc4 579 dprintk("%s session is draining\n", __func__);
7b939a3f 580 goto out_sleep;
689cf5c1
AB		 581 }
582
2dc03b7f 583 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 584 if (IS_ERR(slot)) {
585 /* If out of memory, try again in 1/4 second */
586 if (slot == ERR_PTR(-ENOMEM))
587 task->tk_timeout = HZ >> 2;
fbcd4abc 588 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 589 goto out_sleep;
fbcd4abc
AA		 590 }
591 spin_unlock(&tbl->slot_tbl_lock);
592
2b2fa717 593 args->sa_slot = slot;
fbcd4abc 594
2dc03b7f
TM		 595 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
596 slot->slot_nr, slot->seq_nr);
fbcd4abc 597
dfb4f309 598 res->sr_slot = slot;
8e63b6a8 599 res->sr_timestamp = jiffies;
2a6e26cd 600 res->sr_status_flags = 0;
fbcd4abc
AA		 601 /*
602 * sr_status is only set in decode_sequence, and so will remain
603 * set to 1 if an rpc level failure occurs.
604 */
605 res->sr_status = 1;
d9afbd1b
TM		 606out_success:
607 rpc_call_start(task);
ce5039c1 608 return 0;
7b939a3f 609out_sleep:
8fe72bac
TM		 610 /* Privileged tasks are queued with top priority */
611 if (args->sa_privileged)
1e1093c7
TM		 612 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
613 NULL, RPC_PRIORITY_PRIVILEGED);
614 else
615 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 616 spin_unlock(&tbl->slot_tbl_lock);
617 return -EAGAIN;
ce5039c1 618}
dc70d7b3 619EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 620
035168ab 621int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 622 struct nfs4_sequence_args *args,
623 struct nfs4_sequence_res *res,
ce5039c1
AA		 624 struct rpc_task *task)
625{
035168ab 626 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 627 int ret = 0;
628
d9afbd1b
TM		 629 if (session == NULL) {
630 rpc_call_start(task);
035168ab 631 goto out;
d9afbd1b 632 }
035168ab 633
df2fabff 634 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 635 __func__, session->clp, session, res->sr_slot ?
df2fabff 636 res->sr_slot->slot_nr : -1);
ce5039c1 637
9d12b216 638 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 639out:
640 dprintk("<-- %s status=%d\n", __func__, ret);
641 return ret;
642}
643
644struct nfs41_call_sync_data {
035168ab 645 const struct nfs_server *seq_server;
ce5039c1
AA		 646 struct nfs4_sequence_args *seq_args;
647 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 648};
649
650static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
651{
652 struct nfs41_call_sync_data *data = calldata;
6ba7db34 653 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 654
035168ab
TM		 655 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
656
d9afbd1b 657 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 658}
659
69ab40c4
AA		 660static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
661{
662 struct nfs41_call_sync_data *data = calldata;
663
14516c3a 664 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 665}
666
17280175 667static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 668 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 669 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 670};
671
7c513058
BS		 672static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
673 struct nfs_server *server,
ce5039c1
AA		 674 struct rpc_message *msg,
675 struct nfs4_sequence_args *args,
8fe72bac 676 struct nfs4_sequence_res *res)
ce5039c1
AA		 677{
678 int ret;
679 struct rpc_task *task;
680 struct nfs41_call_sync_data data = {
035168ab 681 .seq_server = server,
ce5039c1
AA		 682 .seq_args = args,
683 .seq_res = res,
ce5039c1
AA		 684 };
685 struct rpc_task_setup task_setup = {
7c513058 686 .rpc_client = clnt,
ce5039c1
AA		 687 .rpc_message = msg,
688 .callback_ops = &nfs41_call_sync_ops,
689 .callback_data = &data
690 };
691
ce5039c1
AA		 692 task = rpc_run_task(&task_setup);
693 if (IS_ERR(task))
694 ret = PTR_ERR(task);
695 else {
696 ret = task->tk_status;
697 rpc_put_task(task);
698 }
699 return ret;
700}
701
df896455 702#else
8fe72bac 703static
9d12b216
TM		 704void nfs41_init_sequence(struct nfs4_sequence_args *args,
705 struct nfs4_sequence_res *res, int cache_reply)
706{
707}
708
8fe72bac
TM		 709static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
710{
711}
712
713
14516c3a
TM		 714static int nfs4_sequence_done(struct rpc_task *task,
715 struct nfs4_sequence_res *res)
df896455 716{
14516c3a 717 return 1;
df896455 718}
cccef3b9
AA		 719#endif /* CONFIG_NFS_V4_1 */
720
fd0c0953 721static
7c513058
BS		 722int _nfs4_call_sync(struct rpc_clnt *clnt,
723 struct nfs_server *server,
cccef3b9
AA		 724 struct rpc_message *msg,
725 struct nfs4_sequence_args *args,
fd0c0953 726 struct nfs4_sequence_res *res)
cccef3b9 727{
7c513058 728 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 729}
730
fd0c0953 731static
7c513058
BS		 732int nfs4_call_sync(struct rpc_clnt *clnt,
733 struct nfs_server *server,
e73b83f2
BS		 734 struct rpc_message *msg,
735 struct nfs4_sequence_args *args,
736 struct nfs4_sequence_res *res,
737 int cache_reply)
738{
fd0c0953 739 nfs41_init_sequence(args, res, cache_reply);
7c513058 740 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 741 args, res);
e73b83f2 742}
cccef3b9 743
38478b24 744static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 745{
38478b24 746 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 747
38478b24 748 spin_lock(&dir->i_lock);
359d7d1c 749 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 750 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 751 nfs_force_lookup_revalidate(dir);
a9a4a87a 752 dir->i_version = cinfo->after;
de242c0b 753 nfs_fscache_invalidate(dir);
38478b24 754 spin_unlock(&dir->i_lock);
1da177e4
LT		 755}
756
e56e0b78 757struct nfs4_opendata {
c6d00e63 758 struct kref kref;
e56e0b78
TM		 759 struct nfs_openargs o_arg;
760 struct nfs_openres o_res;
cdd4e68b
TM		 761 struct nfs_open_confirmargs c_arg;
762 struct nfs_open_confirmres c_res;
6926afd1
TM		 763 struct nfs4_string owner_name;
764 struct nfs4_string group_name;
e56e0b78 765 struct nfs_fattr f_attr;
1775fd3e 766 struct nfs4_label *f_label;
e56e0b78 767 struct dentry *dir;
82a2c1b7 768 struct dentry *dentry;
e56e0b78 769 struct nfs4_state_owner *owner;
aac00a8d 770 struct nfs4_state *state;
e56e0b78 771 struct iattr attrs;
26e976a8 772 unsigned long timestamp;
3e309914 773 unsigned int rpc_done : 1;
bdeca1b7 774 unsigned int is_recover : 1;
24ac23ab
TM		 775 int rpc_status;
776 int cancelled;
e56e0b78
TM		 777};
778
49f9a0fa
TM		 779static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
780 int err, struct nfs4_exception *exception)
781{
782 if (err != -EINVAL)
783 return false;
784 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
785 return false;
786 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
787 exception->retry = 1;
788 return true;
789}
790
791static enum open_claim_type4
792nfs4_map_atomic_open_claim(struct nfs_server *server,
793 enum open_claim_type4 claim)
794{
795 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
796 return claim;
797 switch (claim) {
798 default:
799 return claim;
800 case NFS4_OPEN_CLAIM_FH:
801 return NFS4_OPEN_CLAIM_NULL;
802 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
803 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
804 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
805 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
806 }
807}
2ced46c2
TM		 808
809static void nfs4_init_opendata_res(struct nfs4_opendata *p)
810{
811 p->o_res.f_attr = &p->f_attr;
1775fd3e 812 p->o_res.f_label = p->f_label;
c1d51931
TM		 813 p->o_res.seqid = p->o_arg.seqid;
814 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 815 p->o_res.server = p->o_arg.server;
5f657530 816 p->o_res.access_request = p->o_arg.access;
2ced46c2 817 nfs_fattr_init(&p->f_attr);
6926afd1 818 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 819}
820
82a2c1b7 821static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 822 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 823 const struct iattr *attrs,
1775fd3e 824 struct nfs4_label *label,
4a1c0893 825 enum open_claim_type4 claim,
8535b2be 826 gfp_t gfp_mask)
e56e0b78 827{
82a2c1b7 828 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 829 struct inode *dir = parent->d_inode;
830 struct nfs_server *server = NFS_SERVER(dir);
831 struct nfs4_opendata *p;
832
8535b2be 833 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 834 if (p == NULL)
835 goto err;
8535b2be 836 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 837 if (p->o_arg.seqid == NULL)
838 goto err_free;
82a2c1b7
AV		 839 nfs_sb_active(dentry->d_sb);
840 p->dentry = dget(dentry);
e56e0b78
TM		 841 p->dir = parent;
842 p->owner = sp;
843 atomic_inc(&sp->so_count);
dc0b027d
TM		 844 p->o_arg.open_flags = flags;
845 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 846 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
847 * will return permission denied for all bits until close */
848 if (!(flags & O_EXCL)) {
849 /* ask server to check for all possible rights as results
850 * are cached */
851 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
852 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 853 }
7539bbab 854 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 855 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
856 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 857 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 858 p->o_arg.server = server;
859 p->o_arg.bitmask = server->attr_bitmask;
1549210f 860 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 861 p->o_arg.label = label;
49f9a0fa
TM		 862 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
863 switch (p->o_arg.claim) {
4a1c0893
TM		 864 case NFS4_OPEN_CLAIM_NULL:
865 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
866 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
867 p->o_arg.fh = NFS_FH(dir);
868 break;
869 case NFS4_OPEN_CLAIM_PREVIOUS:
870 case NFS4_OPEN_CLAIM_FH:
871 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
872 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
873 p->o_arg.fh = NFS_FH(dentry->d_inode);
874 }
536e43d1 875 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 876 __be32 verf[2];
d77d76ff 877
e56e0b78
TM		 878 p->o_arg.u.attrs = &p->attrs;
879 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 880
881 verf[0] = jiffies;
882 verf[1] = current->pid;
883 memcpy(p->o_arg.u.verifier.data, verf,
884 sizeof(p->o_arg.u.verifier.data));
e56e0b78 885 }
cdd4e68b
TM		 886 p->c_arg.fh = &p->o_res.fh;
887 p->c_arg.stateid = &p->o_res.stateid;
888 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 889 nfs4_init_opendata_res(p);
c6d00e63 890 kref_init(&p->kref);
e56e0b78
TM		 891 return p;
892err_free:
893 kfree(p);
894err:
895 dput(parent);
896 return NULL;
897}
898
c6d00e63 899static void nfs4_opendata_free(struct kref *kref)
e56e0b78 900{
c6d00e63
TM		 901 struct nfs4_opendata *p = container_of(kref,
902 struct nfs4_opendata, kref);
82a2c1b7 903 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 904
905 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 906 if (p->state != NULL)
907 nfs4_put_open_state(p->state);
c6d00e63
TM		 908 nfs4_put_state_owner(p->owner);
909 dput(p->dir);
82a2c1b7
AV		 910 dput(p->dentry);
911 nfs_sb_deactive(sb);
6926afd1 912 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 913 kfree(p);
914}
915
916static void nfs4_opendata_put(struct nfs4_opendata *p)
917{
918 if (p != NULL)
919 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 920}
921
06f814a3
TM		 922static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
923{
06f814a3
TM		 924 int ret;
925
06f814a3 926 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 927 return ret;
928}
929
dc0b027d 930static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 931{
932 int ret = 0;
dc0b027d 933
536e43d1 934 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 935 goto out;
936 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 937 case FMODE_READ:
88069f77
TM		 938 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
939 && state->n_rdonly != 0;
6ee41268
TM		 940 break;
941 case FMODE_WRITE:
88069f77
TM		 942 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
943 && state->n_wronly != 0;
6ee41268
TM		 944 break;
945 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 946 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
947 && state->n_rdwr != 0;
6ee41268 948 }
dc0b027d 949out:
6ee41268
TM		 950 return ret;
951}
952
dc0b027d 953static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 954{
652f89f6
TM		 955 if (delegation == NULL)
956 return 0;
dc0b027d 957 if ((delegation->type & fmode) != fmode)
aac00a8d 958 return 0;
15c831bf 959 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 960 return 0;
d25be546
TM		 961 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
962 return 0;
b7391f44 963 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 964 return 1;
965}
966
dc0b027d 967static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 968{
dc0b027d 969 switch (fmode) {
e7616923
TM		 970 case FMODE_WRITE:
971 state->n_wronly++;
972 break;
973 case FMODE_READ:
974 state->n_rdonly++;
975 break;
976 case FMODE_READ|FMODE_WRITE:
977 state->n_rdwr++;
978 }
dc0b027d 979 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 980}
981
dc0b027d 982static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 983{
984 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 985 nfs4_stateid_copy(&state->stateid, stateid);
986 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 987 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 988 switch (fmode) {
003707c7
TM		 989 case FMODE_READ:
990 set_bit(NFS_O_RDONLY_STATE, &state->flags);
991 break;
992 case FMODE_WRITE:
993 set_bit(NFS_O_WRONLY_STATE, &state->flags);
994 break;
995 case FMODE_READ|FMODE_WRITE:
996 set_bit(NFS_O_RDWR_STATE, &state->flags);
997 }
e7616923
TM		 998}
999
dc0b027d 1000static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1001{
8bda4e4c 1002 write_seqlock(&state->seqlock);
dc0b027d 1003 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1004 write_sequnlock(&state->seqlock);
003707c7
TM		 1005}
1006
dc0b027d 1007static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1008{
8bda4e4c
TM		 1009 /*
1010 * Protect the call to nfs4_state_set_mode_locked and
1011 * serialise the stateid update
1012 */
1013 write_seqlock(&state->seqlock);
003707c7 1014 if (deleg_stateid != NULL) {
f597c537 1015 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1016 set_bit(NFS_DELEGATED_STATE, &state->flags);
1017 }
1018 if (open_stateid != NULL)
dc0b027d 1019 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1020 write_sequnlock(&state->seqlock);
1021 spin_lock(&state->owner->so_lock);
dc0b027d 1022 update_open_stateflags(state, fmode);
ec073428 1023 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1024}
1025
dc0b027d 1026static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1027{
1028 struct nfs_inode *nfsi = NFS_I(state->inode);
1029 struct nfs_delegation *deleg_cur;
1030 int ret = 0;
1031
dc0b027d 1032 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1033
1034 rcu_read_lock();
1035 deleg_cur = rcu_dereference(nfsi->delegation);
1036 if (deleg_cur == NULL)
1037 goto no_delegation;
1038
1039 spin_lock(&deleg_cur->lock);
1040 if (nfsi->delegation != deleg_cur ||
d25be546 1041 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1042 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1043 goto no_delegation_unlock;
1044
1045 if (delegation == NULL)
1046 delegation = &deleg_cur->stateid;
f597c537 1047 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1048 goto no_delegation_unlock;
1049
b7391f44 1050 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1051 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1052 ret = 1;
1053no_delegation_unlock:
1054 spin_unlock(&deleg_cur->lock);
1055no_delegation:
1056 rcu_read_unlock();
1057
1058 if (!ret && open_stateid != NULL) {
dc0b027d 1059 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1060 ret = 1;
1061 }
1062
1063 return ret;
1064}
1065
1066
dc0b027d 1067static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1068{
1069 struct nfs_delegation *delegation;
1070
1071 rcu_read_lock();
1072 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1073 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1074 rcu_read_unlock();
1075 return;
1076 }
1077 rcu_read_unlock();
57ec14c5 1078 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1079}
1080
6ee41268 1081static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1082{
1083 struct nfs4_state *state = opendata->state;
1084 struct nfs_inode *nfsi = NFS_I(state->inode);
1085 struct nfs_delegation *delegation;
536e43d1 1086 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1087 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1088 nfs4_stateid stateid;
1089 int ret = -EAGAIN;
1090
aac00a8d 1091 for (;;) {
dc0b027d 1092 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1093 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1094 if (can_open_cached(state, fmode, open_mode)) {
1095 update_open_stateflags(state, fmode);
6ee41268 1096 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1097 goto out_return_state;
1098 }
1099 spin_unlock(&state->owner->so_lock);
1100 }
34310430
TM		 1101 rcu_read_lock();
1102 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1103 if (!can_open_delegated(delegation, fmode)) {
34310430 1104 rcu_read_unlock();
aac00a8d 1105 break;
34310430 1106 }
aac00a8d 1107 /* Save the delegation */
f597c537 1108 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1109 rcu_read_unlock();
fa332941 1110 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1111 if (!opendata->is_recover) {
1112 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1113 if (ret != 0)
1114 goto out;
1115 }
aac00a8d 1116 ret = -EAGAIN;
34310430
TM		 1117
1118 /* Try to update the stateid using the delegation */
dc0b027d 1119 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1120 goto out_return_state;
aac00a8d 1121 }
aac00a8d
TM		 1122out:
1123 return ERR_PTR(ret);
1124out_return_state:
1125 atomic_inc(&state->count);
1126 return state;
1127}
1128
e23008ec
AA		 1129static void
1130nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1131{
1132 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1133 struct nfs_delegation *delegation;
1134 int delegation_flags = 0;
1135
1136 rcu_read_lock();
1137 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1138 if (delegation)
1139 delegation_flags = delegation->flags;
1140 rcu_read_unlock();
1141 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1142 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1143 "returning a delegation for "
1144 "OPEN(CLAIM_DELEGATE_CUR)\n",
1145 clp->cl_hostname);
1146 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1147 nfs_inode_set_delegation(state->inode,
1148 data->owner->so_cred,
1149 &data->o_res);
1150 else
1151 nfs_inode_reclaim_delegation(state->inode,
1152 data->owner->so_cred,
1153 &data->o_res);
1154}
1155
1156/*
1157 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1158 * and update the nfs4_state.
1159 */
1160static struct nfs4_state *
1161_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1162{
1163 struct inode *inode = data->state->inode;
1164 struct nfs4_state *state = data->state;
1165 int ret;
1166
1167 if (!data->rpc_done) {
1168 ret = data->rpc_status;
1169 goto err;
1170 }
1171
1172 ret = -ESTALE;
1173 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1174 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1175 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1176 goto err;
1177
1178 ret = -ENOMEM;
1179 state = nfs4_get_open_state(inode, data->owner);
1180 if (state == NULL)
1181 goto err;
1182
1183 ret = nfs_refresh_inode(inode, &data->f_attr);
1184 if (ret)
1185 goto err;
1186
1187 if (data->o_res.delegation_type != 0)
1188 nfs4_opendata_check_deleg(data, state);
1189 update_open_stateid(state, &data->o_res.stateid, NULL,
1190 data->o_arg.fmode);
1191
1192 return state;
1193err:
1194 return ERR_PTR(ret);
1195
1196}
1197
1198static struct nfs4_state *
1199_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1200{
1201 struct inode *inode;
1202 struct nfs4_state *state = NULL;
1b370bc2 1203 int ret;
24ac23ab 1204
aac00a8d 1205 if (!data->rpc_done) {
6ee41268 1206 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1207 goto out;
1208 }
1209
1b370bc2 1210 ret = -EAGAIN;
24ac23ab 1211 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1212 goto err;
1775fd3e 1213 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1214 ret = PTR_ERR(inode);
03f28e3a 1215 if (IS_ERR(inode))
1b370bc2
TM		 1216 goto err;
1217 ret = -ENOMEM;
24ac23ab
TM		 1218 state = nfs4_get_open_state(inode, data->owner);
1219 if (state == NULL)
1b370bc2 1220 goto err_put_inode;
e23008ec
AA		 1221 if (data->o_res.delegation_type != 0)
1222 nfs4_opendata_check_deleg(data, state);
34310430 1223 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1224 data->o_arg.fmode);
24ac23ab 1225 iput(inode);
aac00a8d 1226out:
7aa262b5 1227 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1228 return state;
1b370bc2
TM		 1229err_put_inode:
1230 iput(inode);
1231err:
1232 return ERR_PTR(ret);
24ac23ab
TM		 1233}
1234
e23008ec
AA		 1235static struct nfs4_state *
1236nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1237{
1238 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1239 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1240 return _nfs4_opendata_to_nfs4_state(data);
1241}
1242
864472e9
TM		 1243static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1244{
1245 struct nfs_inode *nfsi = NFS_I(state->inode);
1246 struct nfs_open_context *ctx;
1247
1248 spin_lock(&state->inode->i_lock);
1249 list_for_each_entry(ctx, &nfsi->open_files, list) {
1250 if (ctx->state != state)
1251 continue;
1252 get_nfs_open_context(ctx);
1253 spin_unlock(&state->inode->i_lock);
1254 return ctx;
1255 }
1256 spin_unlock(&state->inode->i_lock);
1257 return ERR_PTR(-ENOENT);
1258}
1259
4a1c0893
TM		 1260static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1261 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1262{
1263 struct nfs4_opendata *opendata;
1264
4a1c0893 1265 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1266 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1267 if (opendata == NULL)
1268 return ERR_PTR(-ENOMEM);
1269 opendata->state = state;
1270 atomic_inc(&state->count);
1271 return opendata;
1272}
1273
dc0b027d 1274static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1275{
2ced46c2 1276 struct nfs4_state *newstate;
864472e9
TM		 1277 int ret;
1278
dc0b027d
TM		 1279 opendata->o_arg.open_flags = 0;
1280 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1281 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1282 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1283 nfs4_init_opendata_res(opendata);
b257957e 1284 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1285 if (ret != 0)
1286 return ret;
2ced46c2 1287 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1288 if (IS_ERR(newstate))
1289 return PTR_ERR(newstate);
643168c2 1290 nfs4_close_state(newstate, fmode);
2ced46c2 1291 *res = newstate;
864472e9
TM		 1292 return 0;
1293}
1294
1295static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1296{
864472e9 1297 struct nfs4_state *newstate;
864472e9
TM		 1298 int ret;
1299
1300 /* memory barrier prior to reading state->n_* */
2ced46c2 1301 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1302 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1303 smp_rmb();
1304 if (state->n_rdwr != 0) {
b0ed9dbc 1305 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1306 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1307 if (ret != 0)
1308 return ret;
2ced46c2
TM		 1309 if (newstate != state)
1310 return -ESTALE;
864472e9
TM		 1311 }
1312 if (state->n_wronly != 0) {
b0ed9dbc 1313 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1314 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1315 if (ret != 0)
1316 return ret;
2ced46c2
TM		 1317 if (newstate != state)
1318 return -ESTALE;
864472e9
TM		 1319 }
1320 if (state->n_rdonly != 0) {
b0ed9dbc 1321 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1322 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1323 if (ret != 0)
1324 return ret;
2ced46c2
TM		 1325 if (newstate != state)
1326 return -ESTALE;
864472e9 1327 }
1ac7e2fd
TM		 1328 /*
1329 * We may have performed cached opens for all three recoveries.
1330 * Check if we need to update the current stateid.
1331 */
1332 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1333 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1334 write_seqlock(&state->seqlock);
1ac7e2fd 1335 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1336 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1337 write_sequnlock(&state->seqlock);
1ac7e2fd 1338 }
864472e9
TM		 1339 return 0;
1340}
1341
1da177e4
LT		 1342/*
1343 * OPEN_RECLAIM:
1344 * reclaim state on the server after a reboot.
1da177e4 1345 */
539cd03a 1346static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1347{
1ac7e2fd 1348 struct nfs_delegation *delegation;
864472e9 1349 struct nfs4_opendata *opendata;
dc0b027d 1350 fmode_t delegation_type = 0;
1da177e4
LT		 1351 int status;
1352
4a1c0893
TM		 1353 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1354 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1355 if (IS_ERR(opendata))
1356 return PTR_ERR(opendata);
1ac7e2fd
TM		 1357 rcu_read_lock();
1358 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1359 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1360 delegation_type = delegation->type;
1ac7e2fd 1361 rcu_read_unlock();
864472e9
TM		 1362 opendata->o_arg.u.delegation_type = delegation_type;
1363 status = nfs4_open_recover(opendata, state);
c6d00e63 1364 nfs4_opendata_put(opendata);
1da177e4
LT		 1365 return status;
1366}
1367
539cd03a 1368static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1369{
1370 struct nfs_server *server = NFS_SERVER(state->inode);
1371 struct nfs4_exception exception = { };
1372 int err;
1373 do {
539cd03a 1374 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1375 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1376 continue;
168667c4 1377 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1378 break;
1379 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1380 } while (exception.retry);
1381 return err;
1382}
1383
864472e9
TM		 1384static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1385{
1386 struct nfs_open_context *ctx;
1387 int ret;
1388
1389 ctx = nfs4_state_find_open_context(state);
1390 if (IS_ERR(ctx))
91876b13 1391 return -EAGAIN;
539cd03a 1392 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1393 put_nfs_open_context(ctx);
1394 return ret;
1395}
1396
db4f2e63 1397static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1398{
be76b5b6
TM		 1399 switch (err) {
1400 default:
1401 printk(KERN_ERR "NFS: %s: unhandled error "
1402 "%d.\n", __func__, err);
1403 case 0:
1404 case -ENOENT:
1405 case -ESTALE:
1406 break;
1407 case -NFS4ERR_BADSESSION:
1408 case -NFS4ERR_BADSLOT:
1409 case -NFS4ERR_BAD_HIGH_SLOT:
1410 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1411 case -NFS4ERR_DEADSESSION:
1412 set_bit(NFS_DELEGATED_STATE, &state->flags);
1413 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1414 return -EAGAIN;
1415 case -NFS4ERR_STALE_CLIENTID:
1416 case -NFS4ERR_STALE_STATEID:
1417 set_bit(NFS_DELEGATED_STATE, &state->flags);
1418 case -NFS4ERR_EXPIRED:
1419 /* Don't recall a delegation if it was lost */
1420 nfs4_schedule_lease_recovery(server->nfs_client);
1421 return -EAGAIN;
1422 case -NFS4ERR_DELEG_REVOKED:
1423 case -NFS4ERR_ADMIN_REVOKED:
1424 case -NFS4ERR_BAD_STATEID:
db4f2e63 1425 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1426 nfs_inode_find_state_and_recover(state->inode,
1427 stateid);
1428 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1429 return 0;
1430 case -NFS4ERR_DELAY:
1431 case -NFS4ERR_GRACE:
1432 set_bit(NFS_DELEGATED_STATE, &state->flags);
1433 ssleep(1);
1434 return -EAGAIN;
db4f2e63
TM		 1435 case -ENOMEM:
1436 case -NFS4ERR_DENIED:
1437 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1438 return 0;
be76b5b6 1439 }
1da177e4
LT		 1440 return err;
1441}
1442
db4f2e63
TM		 1443int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1444{
1445 struct nfs_server *server = NFS_SERVER(state->inode);
1446 struct nfs4_opendata *opendata;
1447 int err;
1448
1449 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1450 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1451 if (IS_ERR(opendata))
1452 return PTR_ERR(opendata);
1453 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1454 err = nfs4_open_recover(opendata, state);
1455 nfs4_opendata_put(opendata);
1456 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1457}
1458
cdd4e68b
TM		 1459static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1460{
1461 struct nfs4_opendata *data = calldata;
1462
1463 data->rpc_status = task->tk_status;
26e976a8 1464 if (data->rpc_status == 0) {
f597c537 1465 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1466 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1467 renew_lease(data->o_res.server, data->timestamp);
3e309914 1468 data->rpc_done = 1;
26e976a8 1469 }
cdd4e68b
TM		 1470}
1471
1472static void nfs4_open_confirm_release(void *calldata)
1473{
1474 struct nfs4_opendata *data = calldata;
1475 struct nfs4_state *state = NULL;
1476
1477 /* If this request hasn't been cancelled, do nothing */
1478 if (data->cancelled == 0)
1479 goto out_free;
1480 /* In case of error, no cleanup! */
3e309914 1481 if (!data->rpc_done)
cdd4e68b 1482 goto out_free;
cdd4e68b 1483 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1484 if (!IS_ERR(state))
643168c2 1485 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1486out_free:
c6d00e63 1487 nfs4_opendata_put(data);
cdd4e68b
TM		 1488}
1489
1490static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1491 .rpc_call_done = nfs4_open_confirm_done,
1492 .rpc_release = nfs4_open_confirm_release,
1493};
1494
1495/*
1496 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1497 */
1498static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1499{
1500 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1501 struct rpc_task *task;
5138fde0
TM		 1502 struct rpc_message msg = {
1503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1504 .rpc_argp = &data->c_arg,
1505 .rpc_resp = &data->c_res,
1506 .rpc_cred = data->owner->so_cred,
1507 };
c970aa85
TM		 1508 struct rpc_task_setup task_setup_data = {
1509 .rpc_client = server->client,
5138fde0 1510 .rpc_message = &msg,
c970aa85
TM		 1511 .callback_ops = &nfs4_open_confirm_ops,
1512 .callback_data = data,
101070ca 1513 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1514 .flags = RPC_TASK_ASYNC,
1515 };
1da177e4
LT		 1516 int status;
1517
c6d00e63 1518 kref_get(&data->kref);
3e309914
TM		 1519 data->rpc_done = 0;
1520 data->rpc_status = 0;
5138fde0 1521 data->timestamp = jiffies;
c970aa85 1522 task = rpc_run_task(&task_setup_data);
7a1218a2 1523 if (IS_ERR(task))
cdd4e68b 1524 return PTR_ERR(task);
cdd4e68b
TM		 1525 status = nfs4_wait_for_completion_rpc_task(task);
1526 if (status != 0) {
1527 data->cancelled = 1;
1528 smp_wmb();
1529 } else
1530 status = data->rpc_status;
e6b3c4db 1531 rpc_put_task(task);
1da177e4
LT		 1532 return status;
1533}
1534
24ac23ab 1535static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1536{
24ac23ab
TM		 1537 struct nfs4_opendata *data = calldata;
1538 struct nfs4_state_owner *sp = data->owner;
549b19cc 1539 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1540
24ac23ab 1541 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1542 goto out_wait;
aac00a8d
TM		 1543 /*
1544 * Check if we still need to send an OPEN call, or if we can use
1545 * a delegation instead.
1546 */
1547 if (data->state != NULL) {
1548 struct nfs_delegation *delegation;
1549
dc0b027d 1550 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1551 goto out_no_action;
aac00a8d
TM		 1552 rcu_read_lock();
1553 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1554 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1555 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1556 can_open_delegated(delegation, data->o_arg.fmode))
1557 goto unlock_no_action;
aac00a8d
TM		 1558 rcu_read_unlock();
1559 }
95b72eb0 1560 /* Update client id. */
549b19cc 1561 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1562 switch (data->o_arg.claim) {
1563 case NFS4_OPEN_CLAIM_PREVIOUS:
1564 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1565 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1566 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1567 case NFS4_OPEN_CLAIM_FH:
1568 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1569 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1570 }
26e976a8 1571 data->timestamp = jiffies;
035168ab 1572 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1573 &data->o_arg.seq_args,
2240a9e2
TM		 1574 &data->o_res.seq_res,
1575 task) != 0)
1576 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1577
1578 /* Set the create mode (note dependency on the session type) */
1579 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1580 if (data->o_arg.open_flags & O_EXCL) {
1581 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1582 if (nfs4_has_persistent_session(clp))
1583 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1584 else if (clp->cl_mvops->minor_version > 0)
1585 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1586 }
6ee41268 1587 return;
652f89f6
TM		 1588unlock_no_action:
1589 rcu_read_unlock();
6ee41268
TM		 1590out_no_action:
1591 task->tk_action = NULL;
c8da19b9 1592out_wait:
b75ad4cd 1593 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1594}
1595
24ac23ab
TM		 1596static void nfs4_open_done(struct rpc_task *task, void *calldata)
1597{
1598 struct nfs4_opendata *data = calldata;
1da177e4 1599
24ac23ab 1600 data->rpc_status = task->tk_status;
d898528c 1601
14516c3a
TM		 1602 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1603 return;
d898528c 1604
24ac23ab 1605 if (task->tk_status == 0) {
807d66d8
TM		 1606 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1607 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1608 case S_IFREG:
1609 break;
1610 case S_IFLNK:
24ac23ab 1611 data->rpc_status = -ELOOP;
6f926b5b
TM		 1612 break;
1613 case S_IFDIR:
24ac23ab 1614 data->rpc_status = -EISDIR;
6f926b5b
TM		 1615 break;
1616 default:
24ac23ab 1617 data->rpc_status = -ENOTDIR;
807d66d8 1618 }
6f926b5b 1619 }
26e976a8 1620 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1621 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1622 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1623 }
3e309914 1624 data->rpc_done = 1;
24ac23ab 1625}
6f926b5b 1626
24ac23ab
TM		 1627static void nfs4_open_release(void *calldata)
1628{
1629 struct nfs4_opendata *data = calldata;
1630 struct nfs4_state *state = NULL;
1631
1632 /* If this request hasn't been cancelled, do nothing */
1633 if (data->cancelled == 0)
1634 goto out_free;
1635 /* In case of error, no cleanup! */
3e309914 1636 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1637 goto out_free;
1638 /* In case we need an open_confirm, no cleanup! */
1639 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1640 goto out_free;
24ac23ab 1641 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1642 if (!IS_ERR(state))
643168c2 1643 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1644out_free:
c6d00e63 1645 nfs4_opendata_put(data);
24ac23ab
TM		 1646}
1647
1648static const struct rpc_call_ops nfs4_open_ops = {
1649 .rpc_call_prepare = nfs4_open_prepare,
1650 .rpc_call_done = nfs4_open_done,
1651 .rpc_release = nfs4_open_release,
1652};
1653
b257957e 1654static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1655{
1656 struct inode *dir = data->dir->d_inode;
1657 struct nfs_server *server = NFS_SERVER(dir);
1658 struct nfs_openargs *o_arg = &data->o_arg;
1659 struct nfs_openres *o_res = &data->o_res;
1660 struct rpc_task *task;
5138fde0
TM		 1661 struct rpc_message msg = {
1662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1663 .rpc_argp = o_arg,
1664 .rpc_resp = o_res,
1665 .rpc_cred = data->owner->so_cred,
1666 };
c970aa85
TM		 1667 struct rpc_task_setup task_setup_data = {
1668 .rpc_client = server->client,
5138fde0 1669 .rpc_message = &msg,
c970aa85
TM		 1670 .callback_ops = &nfs4_open_ops,
1671 .callback_data = data,
101070ca 1672 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1673 .flags = RPC_TASK_ASYNC,
1674 };
24ac23ab
TM		 1675 int status;
1676
9d12b216 1677 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1678 kref_get(&data->kref);
3e309914
TM		 1679 data->rpc_done = 0;
1680 data->rpc_status = 0;
2ced46c2 1681 data->cancelled = 0;
bdeca1b7
TM		 1682 data->is_recover = 0;
1683 if (isrecover) {
8fe72bac 1684 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1685 data->is_recover = 1;
1686 }
c970aa85 1687 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1688 if (IS_ERR(task))
1689 return PTR_ERR(task);
1690 status = nfs4_wait_for_completion_rpc_task(task);
1691 if (status != 0) {
1692 data->cancelled = 1;
1693 smp_wmb();
1694 } else
1695 status = data->rpc_status;
1696 rpc_put_task(task);
1697
1698 return status;
1699}
1700
1701static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1702{
1703 struct inode *dir = data->dir->d_inode;
1704 struct nfs_openres *o_res = &data->o_res;
1705 int status;
1706
1707 status = nfs4_run_open_task(data, 1);
1708 if (status != 0 || !data->rpc_done)
1709 return status;
1710
6926afd1
TM		 1711 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1712
b257957e
AB		 1713 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1714 status = _nfs4_proc_open_confirm(data);
1715 if (status != 0)
1716 return status;
1717 }
1718
1719 return status;
1720}
1721
6168f62c
WAA		 1722static int nfs4_opendata_access(struct rpc_cred *cred,
1723 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1724 struct nfs4_state *state, fmode_t fmode,
1725 int openflags)
6168f62c
WAA		 1726{
1727 struct nfs_access_entry cache;
1728 u32 mask;
1729
1730 /* access call failed or for some reason the server doesn't
1731 * support any access modes -- defer access call until later */
1732 if (opendata->o_res.access_supported == 0)
1733 return 0;
1734
1735 mask = 0;
bbd3a8ee 1736 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1737 * write mode bits, but POSIX allows the creating process to write.
1738 * use openflags to check for exec, because fmode won't
1739 * always have FMODE_EXEC set when file open for exec. */
1740 if (openflags & __FMODE_EXEC) {
1741 /* ONLY check for exec rights */
1742 mask = MAY_EXEC;
1743 } else if (fmode & FMODE_READ)
1744 mask = MAY_READ;
6168f62c
WAA		 1745
1746 cache.cred = cred;
1747 cache.jiffies = jiffies;
1748 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1749 nfs_access_add_cache(state->inode, &cache);
1750
bbd3a8ee 1751 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1752 return 0;
1753
1754 /* even though OPEN succeeded, access is denied. Close the file */
1755 nfs4_close_state(state, fmode);
998f40b5 1756 return -EACCES;
6168f62c
WAA		 1757}
1758
b257957e
AB		 1759/*
1760 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1761 */
1762static int _nfs4_proc_open(struct nfs4_opendata *data)
1763{
1764 struct inode *dir = data->dir->d_inode;
1765 struct nfs_server *server = NFS_SERVER(dir);
1766 struct nfs_openargs *o_arg = &data->o_arg;
1767 struct nfs_openres *o_res = &data->o_res;
1768 int status;
1769
1770 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1771 if (!data->rpc_done)
1772 return status;
1773 if (status != 0) {
1774 if (status == -NFS4ERR_BADNAME &&
1775 !(o_arg->open_flags & O_CREAT))
1776 return -ENOENT;
24ac23ab 1777 return status;
08ef7bd3 1778 }
24ac23ab 1779
6926afd1
TM		 1780 nfs_fattr_map_and_free_names(server, &data->f_attr);
1781
90ff0c54 1782 if (o_arg->open_flags & O_CREAT)
56ae19f3 1783 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1784 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1785 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1786 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1787 status = _nfs4_proc_open_confirm(data);
1da177e4 1788 if (status != 0)
24ac23ab 1789 return status;
1da177e4
LT		 1790 }
1791 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1792 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1793 return 0;
1da177e4
LT		 1794}
1795
d83217c1
AA		 1796static int nfs4_recover_expired_lease(struct nfs_server *server)
1797{
1798 return nfs4_client_recover_expired_lease(server->nfs_client);
1799}
1800
1da177e4
LT		 1801/*
1802 * OPEN_EXPIRED:
1803 * reclaim state on the server after a network partition.
1804 * Assumes caller holds the appropriate lock
1805 */
539cd03a 1806static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1807{
e56e0b78 1808 struct nfs4_opendata *opendata;
864472e9 1809 int ret;
1da177e4 1810
4a1c0893 1811 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1812 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1813 if (IS_ERR(opendata))
1814 return PTR_ERR(opendata);
864472e9 1815 ret = nfs4_open_recover(opendata, state);
35d05778 1816 if (ret == -ESTALE)
3d4ff43d 1817 d_drop(ctx->dentry);
c6d00e63 1818 nfs4_opendata_put(opendata);
864472e9 1819 return ret;
1da177e4
LT		 1820}
1821
a9ed2e25 1822static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1823{
539cd03a 1824 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1825 struct nfs4_exception exception = { };
1826 int err;
1827
1828 do {
539cd03a 1829 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1830 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1831 continue;
a9ed2e25
TM		 1832 switch (err) {
1833 default:
1834 goto out;
1835 case -NFS4ERR_GRACE:
1836 case -NFS4ERR_DELAY:
1837 nfs4_handle_exception(server, err, &exception);
1838 err = 0;
1839 }
202b50dc 1840 } while (exception.retry);
a9ed2e25 1841out:
202b50dc
TM		 1842 return err;
1843}
1844
1da177e4
LT		 1845static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1846{
1da177e4 1847 struct nfs_open_context *ctx;
864472e9 1848 int ret;
1da177e4 1849
864472e9
TM		 1850 ctx = nfs4_state_find_open_context(state);
1851 if (IS_ERR(ctx))
91876b13 1852 return -EAGAIN;
539cd03a 1853 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1854 put_nfs_open_context(ctx);
1855 return ret;
1da177e4
LT		 1856}
1857
f062eb6c 1858#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1859static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1860{
f062eb6c 1861 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1862 nfs4_stateid *stateid = &state->stateid;
1863 int status;
1864
1865 /* If a state reset has been done, test_stateid is unneeded */
1866 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1867 return;
1868
1869 status = nfs41_test_stateid(server, stateid);
1870 if (status != NFS_OK) {
1871 /* Free the stateid unless the server explicitly
1872 * informs us the stateid is unrecognized. */
1873 if (status != -NFS4ERR_BAD_STATEID)
1874 nfs41_free_stateid(server, stateid);
6938867e 1875 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1876
6938867e
BS		 1877 write_seqlock(&state->seqlock);
1878 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1879 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1880 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1881 }
1882}
1883
1884/**
1885 * nfs41_check_open_stateid - possibly free an open stateid
1886 *
1887 * @state: NFSv4 state for an inode
1888 *
1889 * Returns NFS_OK if recovery for this stateid is now finished.
1890 * Otherwise a negative NFS4ERR value is returned.
1891 */
1892static int nfs41_check_open_stateid(struct nfs4_state *state)
1893{
1894 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1895 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1896 int status;
1897
1898 /* If a state reset has been done, test_stateid is unneeded */
1899 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1900 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1901 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1902 return -NFS4ERR_BAD_STATEID;
1903
1904 status = nfs41_test_stateid(server, stateid);
1905 if (status != NFS_OK) {
1906 /* Free the stateid unless the server explicitly
1907 * informs us the stateid is unrecognized. */
1908 if (status != -NFS4ERR_BAD_STATEID)
1909 nfs41_free_stateid(server, stateid);
1910
1911 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1912 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1913 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 1914 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 1915 }
1916 return status;
1917}
1918
1919static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1920{
eb64cf96 1921 int status;
b01dd1d8 1922
3e60ffdd
CL		 1923 nfs41_clear_delegation_stateid(state);
1924 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1925 if (status != NFS_OK)
1926 status = nfs4_open_expired(sp, state);
1927 return status;
f062eb6c
BS		 1928}
1929#endif
1930
aa53ed54
JL		 1931/*
1932 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1933 * fields corresponding to attributes that were used to store the verifier.
1934 * Make sure we clobber those fields in the later setattr call
1935 */
1936static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1937{
1938 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1939 !(sattr->ia_valid & ATTR_ATIME_SET))
1940 sattr->ia_valid |= ATTR_ATIME;
1941
1942 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1943 !(sattr->ia_valid & ATTR_MTIME_SET))
1944 sattr->ia_valid |= ATTR_MTIME;
1945}
1946
c21443c2
TM		 1947static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1948 fmode_t fmode,
1949 int flags,
1950 struct nfs4_state **res)
1951{
1952 struct nfs4_state_owner *sp = opendata->owner;
1953 struct nfs_server *server = sp->so_server;
1954 struct nfs4_state *state;
1955 unsigned int seq;
1956 int ret;
1957
1958 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1959
1960 ret = _nfs4_proc_open(opendata);
1961 if (ret != 0)
1962 goto out;
1963
1964 state = nfs4_opendata_to_nfs4_state(opendata);
1965 ret = PTR_ERR(state);
1966 if (IS_ERR(state))
1967 goto out;
1968 if (server->caps & NFS_CAP_POSIX_LOCK)
1969 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1970
1971 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1972 if (ret != 0)
1973 goto out;
1974
91876b13 1975 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1976 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1977 *res = state;
1978out:
1979 return ret;
1980}
1981
1da177e4 1982/*
24ac23ab 1983 * Returns a referenced nfs4_state
1da177e4 1984 */
82be417a
AA		 1985static int _nfs4_do_open(struct inode *dir,
1986 struct dentry *dentry,
1987 fmode_t fmode,
1988 int flags,
1989 struct iattr *sattr,
1775fd3e 1990 struct nfs4_label *label,
82be417a
AA		 1991 struct rpc_cred *cred,
1992 struct nfs4_state **res,
1993 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1994{
1995 struct nfs4_state_owner *sp;
1996 struct nfs4_state *state = NULL;
1997 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1998 struct nfs4_opendata *opendata;
49f9a0fa 1999 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2000 struct nfs4_label *olabel = NULL;
aac00a8d 2001 int status;
1da177e4
LT		 2002
2003 /* Protect against reboot recovery conflicts */
1da177e4 2004 status = -ENOMEM;
d1e284d5
TM		 2005 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2006 if (sp == NULL) {
1da177e4
LT		 2007 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2008 goto out_err;
2009 }
58d9714a
TM		 2010 status = nfs4_recover_expired_lease(server);
2011 if (status != 0)
b4454fe1 2012 goto err_put_state_owner;
82a2c1b7
AV		 2013 if (dentry->d_inode != NULL)
2014 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2015 status = -ENOMEM;
49f9a0fa
TM		 2016 if (dentry->d_inode)
2017 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2018 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2019 label, claim, GFP_KERNEL);
e56e0b78 2020 if (opendata == NULL)
95d35cb4 2021 goto err_put_state_owner;
1da177e4 2022
82be417a
AA		 2023 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2024 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2025 if (!opendata->f_attr.mdsthreshold)
2026 goto err_opendata_put;
1549210f 2027 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2028 }
82a2c1b7
AV		 2029 if (dentry->d_inode != NULL)
2030 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2031
c21443c2 2032 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 2033 if (status != 0)
2034 goto err_opendata_put;
2035
549b19cc
TM		 2036 if ((opendata->o_arg.open_flags & O_EXCL) &&
2037 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2038 nfs4_exclusive_attrset(opendata, sattr);
2039
2040 nfs_fattr_init(opendata->o_res.f_attr);
2041 status = nfs4_do_setattr(state->inode, cred,
2042 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2043 state, label, olabel);
2044 if (status == 0) {
0ab64e0e 2045 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e
DQ		 2046 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2047 }
0ab64e0e 2048 }
82be417a
AA		 2049
2050 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2051 *ctx_th = opendata->f_attr.mdsthreshold;
2052 else
2053 kfree(opendata->f_attr.mdsthreshold);
2054 opendata->f_attr.mdsthreshold = NULL;
2055
c6d00e63 2056 nfs4_opendata_put(opendata);
1da177e4 2057 nfs4_put_state_owner(sp);
1da177e4
LT		 2058 *res = state;
2059 return 0;
c6d00e63 2060err_opendata_put:
82be417a 2061 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2062 nfs4_opendata_put(opendata);
e56e0b78
TM		 2063err_put_state_owner:
2064 nfs4_put_state_owner(sp);
1da177e4 2065out_err:
1da177e4
LT		 2066 *res = NULL;
2067 return status;
2068}
2069
2070
82be417a
AA		 2071static struct nfs4_state *nfs4_do_open(struct inode *dir,
2072 struct dentry *dentry,
2073 fmode_t fmode,
2074 int flags,
2075 struct iattr *sattr,
1775fd3e 2076 struct nfs4_label *label,
82be417a
AA		 2077 struct rpc_cred *cred,
2078 struct nfs4_threshold **ctx_th)
1da177e4 2079{
49f9a0fa 2080 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2081 struct nfs4_exception exception = { };
2082 struct nfs4_state *res;
2083 int status;
2084
6168f62c 2085 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2086 do {
1775fd3e 2087 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, label, cred,
82be417a 2088 &res, ctx_th);
1da177e4
LT		 2089 if (status == 0)
2090 break;
2091 /* NOTE: BAD_SEQID means the server and client disagree about the
2092 * book-keeping w.r.t. state-changing operations
2093 * (OPEN/CLOSE/LOCK/LOCKU...)
2094 * It is actually a sign of a bug on the client or on the server.
2095 *
2096 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2097 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2098 * have unhashed the old state_owner for us, and that we can
2099 * therefore safely retry using a new one. We should still warn
2100 * the user though...
2101 */
2102 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2103 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2104 " returned a bad sequence-id error!\n",
2105 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2106 exception.retry = 1;
2107 continue;
2108 }
550f5747
TM		 2109 /*
2110 * BAD_STATEID on OPEN means that the server cancelled our
2111 * state before it received the OPEN_CONFIRM.
2112 * Recover by retrying the request as per the discussion
2113 * on Page 181 of RFC3530.
2114 */
2115 if (status == -NFS4ERR_BAD_STATEID) {
2116 exception.retry = 1;
2117 continue;
2118 }
aac00a8d
TM		 2119 if (status == -EAGAIN) {
2120 /* We must have found a delegation */
2121 exception.retry = 1;
2122 continue;
2123 }
49f9a0fa
TM		 2124 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2125 continue;
2126 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2127 status, &exception));
2128 } while (exception.retry);
2129 return res;
2130}
2131
659bfcd6
TM		 2132static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2133 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2134 struct nfs4_state *state, struct nfs4_label *ilabel,
2135 struct nfs4_label *olabel)
1da177e4 2136{
3e4f6290 2137 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2138 struct nfs_setattrargs arg = {
3e4f6290 2139 .fh = NFS_FH(inode),
1da177e4
LT		 2140 .iap = sattr,
2141 .server = server,
2142 .bitmask = server->attr_bitmask,
1775fd3e 2143 .label = ilabel,
1da177e4
LT		 2144 };
2145 struct nfs_setattrres res = {
2146 .fattr = fattr,
1775fd3e 2147 .label = olabel,
1da177e4
LT		 2148 .server = server,
2149 };
2150 struct rpc_message msg = {
659bfcd6
TM		 2151 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2152 .rpc_argp = &arg,
2153 .rpc_resp = &res,
2154 .rpc_cred = cred,
1da177e4 2155 };
26e976a8 2156 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2157 fmode_t fmode;
2158 bool truncate;
65e4308d 2159 int status;
1da177e4 2160
0e574af1 2161 nfs_fattr_init(fattr);
1da177e4 2162
ee3ae84e
TM		 2163 /* Servers should only apply open mode checks for file size changes */
2164 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2165 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2166
2167 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2168 /* Use that stateid */
2169 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2170 struct nfs_lockowner lockowner = {
2171 .l_owner = current->files,
2172 .l_pid = current->tgid,
2173 };
4fc8796d 2174 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2175 &lockowner);
08e9eac4 2176 } else
f597c537 2177 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2178
7c513058 2179 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2180 if (status == 0 && state != NULL)
2181 renew_lease(server, timestamp);
65e4308d 2182 return status;
1da177e4
LT		 2183}
2184
659bfcd6
TM		 2185static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2186 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2187 struct nfs4_state *state, struct nfs4_label *ilabel,
2188 struct nfs4_label *olabel)
1da177e4 2189{
3e4f6290 2190 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2191 struct nfs4_exception exception = {
2192 .state = state,
3114ea7a 2193 .inode = inode,
a1d0b5ee 2194 };
1da177e4
LT		 2195 int err;
2196 do {
1775fd3e 2197 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
451146be
TM		 2198 switch (err) {
2199 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2200 if (!(sattr->ia_valid & ATTR_SIZE)) {
2201 pr_warn_once("NFSv4: server %s is incorrectly "
2202 "applying open mode checks to "
2203 "a SETATTR that is not "
2204 "changing file size.\n",
2205 server->nfs_client->cl_hostname);
2206 }
451146be
TM		 2207 if (state && !(state->state & FMODE_WRITE)) {
2208 err = -EBADF;
2209 if (sattr->ia_valid & ATTR_OPEN)
2210 err = -EACCES;
2211 goto out;
2212 }
2213 }
2214 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2215 } while (exception.retry);
451146be 2216out:
1da177e4
LT		 2217 return err;
2218}
2219
2220struct nfs4_closedata {
2221 struct inode *inode;
2222 struct nfs4_state *state;
2223 struct nfs_closeargs arg;
2224 struct nfs_closeres res;
516a6af6 2225 struct nfs_fattr fattr;
26e976a8 2226 unsigned long timestamp;
f7e8917a
FI		 2227 bool roc;
2228 u32 roc_barrier;
1da177e4
LT		 2229};
2230
963d8fe5 2231static void nfs4_free_closedata(void *data)
9512135d 2232{
963d8fe5
TM		 2233 struct nfs4_closedata *calldata = data;
2234 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2235 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2236
f7e8917a
FI		 2237 if (calldata->roc)
2238 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2239 nfs4_put_open_state(calldata->state);
2240 nfs_free_seqid(calldata->arg.seqid);
9512135d 2241 nfs4_put_state_owner(sp);
322b2b90 2242 nfs_sb_deactive(sb);
9512135d
TM		 2243 kfree(calldata);
2244}
2245
88069f77
TM		 2246static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2247 fmode_t fmode)
2248{
2249 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2250 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2251 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2252 case FMODE_WRITE:
88069f77 2253 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2254 break;
2255 case FMODE_READ:
88069f77 2256 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2257 break;
2258 case 0:
2259 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2260 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2261 clear_bit(NFS_OPEN_STATE, &state->flags);
2262 }
88069f77
TM		 2263 spin_unlock(&state->owner->so_lock);
2264}
2265
963d8fe5 2266static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2267{
963d8fe5 2268 struct nfs4_closedata *calldata = data;
1da177e4 2269 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2270 struct nfs_server *server = NFS_SERVER(calldata->inode);
2271
a3ca5651 2272 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2273 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2274 return;
1da177e4
LT		 2275 /* hmm. we are done with the inode, and in the process of freeing
2276 * the state_owner. we keep this around to process errors
2277 */
1da177e4
LT		 2278 switch (task->tk_status) {
2279 case 0:
f7e8917a
FI		 2280 if (calldata->roc)
2281 pnfs_roc_set_barrier(state->inode,
2282 calldata->roc_barrier);
45328c35 2283 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2284 renew_lease(server, calldata->timestamp);
88069f77
TM		 2285 nfs4_close_clear_stateid_flags(state,
2286 calldata->arg.fmode);
1da177e4
LT		 2287 break;
2288 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2289 case -NFS4ERR_OLD_STATEID:
2290 case -NFS4ERR_BAD_STATEID:
1da177e4 2291 case -NFS4ERR_EXPIRED:
dc0b027d 2292 if (calldata->arg.fmode == 0)
9e33bed5 2293 break;
1da177e4 2294 default:
72211dbe
TM		 2295 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2296 rpc_restart_call_prepare(task);
1da177e4 2297 }
72211dbe 2298 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2299 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2300 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2301}
2302
4ce70ada 2303static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2304{
4ce70ada 2305 struct nfs4_closedata *calldata = data;
9512135d 2306 struct nfs4_state *state = calldata->state;
7fdab069 2307 struct inode *inode = calldata->inode;
88069f77 2308 int call_close = 0;
9512135d 2309
a3ca5651 2310 dprintk("%s: begin!\n", __func__);
963d8fe5 2311 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2312 goto out_wait;
003707c7 2313
88069f77
TM		 2314 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2315 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2316 spin_lock(&state->owner->so_lock);
003707c7 2317 /* Calculate the change in open mode */
e7616923 2318 if (state->n_rdwr == 0) {
003707c7 2319 if (state->n_rdonly == 0) {
88069f77
TM		 2320 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2321 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2322 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2323 }
2324 if (state->n_wronly == 0) {
88069f77
TM		 2325 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2326 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2327 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2328 }
e7616923 2329 }
5d422301
TM		 2330 if (!nfs4_valid_open_stateid(state))
2331 call_close = 0;
4cecb76f 2332 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2333
2334 if (!call_close) {
963d8fe5 2335 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2336 goto out_no_action;
9512135d 2337 }
88069f77 2338
f7e8917a 2339 if (calldata->arg.fmode == 0) {
88069f77 2340 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2341 if (calldata->roc &&
b9536ad5
AA		 2342 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2343 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2344 goto out_wait;
b9536ad5 2345 }
f7e8917a 2346 }
88069f77 2347
516a6af6 2348 nfs_fattr_init(calldata->res.fattr);
26e976a8 2349 calldata->timestamp = jiffies;
7fdab069 2350 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2351 &calldata->arg.seq_args,
2352 &calldata->res.seq_res,
2240a9e2
TM		 2353 task) != 0)
2354 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2355 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2356 return;
2357out_no_action:
2358 task->tk_action = NULL;
2359out_wait:
2360 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2361}
2362
963d8fe5 2363static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2364 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2365 .rpc_call_done = nfs4_close_done,
2366 .rpc_release = nfs4_free_closedata,
2367};
2368
1da177e4
LT		 2369/*
2370 * It is possible for data to be read/written from a mem-mapped file
2371 * after the sys_close call (which hits the vfs layer as a flush).
2372 * This means that we can't safely call nfsv4 close on a file until
2373 * the inode is cleared. This in turn means that we are not good
2374 * NFSv4 citizens - we do not indicate to the server to update the file's
2375 * share state even when we are done with one of the three share
2376 * stateid's in the inode.
2377 *
2378 * NOTE: Caller must be holding the sp->so_owner semaphore!
2379 */
1f7977c1 2380int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2381{
4a35bd41 2382 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2383 struct nfs4_closedata *calldata;
b39e625b
TM		 2384 struct nfs4_state_owner *sp = state->owner;
2385 struct rpc_task *task;
5138fde0
TM		 2386 struct rpc_message msg = {
2387 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2388 .rpc_cred = state->owner->so_cred,
2389 };
c970aa85
TM		 2390 struct rpc_task_setup task_setup_data = {
2391 .rpc_client = server->client,
5138fde0 2392 .rpc_message = &msg,
c970aa85 2393 .callback_ops = &nfs4_close_ops,
101070ca 2394 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2395 .flags = RPC_TASK_ASYNC,
2396 };
9512135d 2397 int status = -ENOMEM;
1da177e4 2398
8535b2be 2399 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2400 if (calldata == NULL)
9512135d 2401 goto out;
9d12b216 2402 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2403 calldata->inode = state->inode;
1da177e4 2404 calldata->state = state;
4a35bd41 2405 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2406 calldata->arg.stateid = &state->open_stateid;
1da177e4 2407 /* Serialization for the sequence id */
8535b2be 2408 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2409 if (calldata->arg.seqid == NULL)
2410 goto out_free_calldata;
dc0b027d 2411 calldata->arg.fmode = 0;
a65318bf 2412 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2413 calldata->res.fattr = &calldata->fattr;
c1d51931 2414 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2415 calldata->res.server = server;
1f7977c1 2416 calldata->roc = pnfs_roc(state->inode);
643168c2 2417 nfs_sb_active(calldata->inode->i_sb);
9512135d 2418
1174dd1f
TM		 2419 msg.rpc_argp = &calldata->arg;
2420 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2421 task_setup_data.callback_data = calldata;
2422 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2423 if (IS_ERR(task))
2424 return PTR_ERR(task);
a49c3c77
TM		 2425 status = 0;
2426 if (wait)
2427 status = rpc_wait_for_completion_task(task);
b39e625b 2428 rpc_put_task(task);
a49c3c77 2429 return status;
9512135d
TM		 2430out_free_calldata:
2431 kfree(calldata);
2432out:
b39e625b
TM		 2433 nfs4_put_open_state(state);
2434 nfs4_put_state_owner(sp);
9512135d 2435 return status;
1da177e4
LT		 2436}
2437
2b484297 2438static struct inode *
cd9a1c0e 2439nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2440{
1da177e4 2441 struct nfs4_state *state;
1775fd3e 2442 struct nfs4_label *label = NULL;
1da177e4 2443
565277f6 2444 /* Protect against concurrent sillydeletes */
1775fd3e 2445 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, label,
82be417a 2446 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2447 if (IS_ERR(state))
2448 return ERR_CAST(state);
cd9a1c0e 2449 ctx->state = state;
f46e0bd3 2450 return igrab(state->inode);
1da177e4
LT		 2451}
2452
1185a552 2453static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2454{
2455 if (ctx->state == NULL)
2456 return;
2457 if (is_sync)
643168c2 2458 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2459 else
643168c2 2460 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2461}
1da177e4
LT		 2462
2463static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2464{
43652ad5
BH		 2465 struct nfs4_server_caps_arg args = {
2466 .fhandle = fhandle,
2467 };
1da177e4
LT		 2468 struct nfs4_server_caps_res res = {};
2469 struct rpc_message msg = {
2470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2471 .rpc_argp = &args,
1da177e4
LT		 2472 .rpc_resp = &res,
2473 };
2474 int status;
2475
7c513058 2476 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2477 if (status == 0) {
2478 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2479 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2480 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2481 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2482 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2483 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2484 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2485 server->caps |= NFS_CAP_ACLS;
2486 if (res.has_links != 0)
2487 server->caps |= NFS_CAP_HARDLINKS;
2488 if (res.has_symlinks != 0)
2489 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2490 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2491 server->caps |= NFS_CAP_FILEID;
2492 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2493 server->caps |= NFS_CAP_MODE;
2494 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2495 server->caps |= NFS_CAP_NLINK;
2496 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2497 server->caps |= NFS_CAP_OWNER;
2498 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2499 server->caps |= NFS_CAP_OWNER_GROUP;
2500 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2501 server->caps |= NFS_CAP_ATIME;
2502 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2503 server->caps |= NFS_CAP_CTIME;
2504 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2505 server->caps |= NFS_CAP_MTIME;
2506
a65318bf
TM		 2507 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2508 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2509 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2510 server->acl_bitmask = res.acl_bitmask;
264e6351 2511 server->fh_expire_type = res.fh_expire_type;
1da177e4 2512 }
cccef3b9 2513
1da177e4
LT		 2514 return status;
2515}
2516
55a97593 2517int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2518{
2519 struct nfs4_exception exception = { };
2520 int err;
2521 do {
2522 err = nfs4_handle_exception(server,
2523 _nfs4_server_capabilities(server, fhandle),
2524 &exception);
2525 } while (exception.retry);
2526 return err;
2527}
2528
2529static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2530 struct nfs_fsinfo *info)
2531{
1da177e4
LT		 2532 struct nfs4_lookup_root_arg args = {
2533 .bitmask = nfs4_fattr_bitmap,
2534 };
2535 struct nfs4_lookup_res res = {
2536 .server = server,
0e574af1 2537 .fattr = info->fattr,
1da177e4
LT		 2538 .fh = fhandle,
2539 };
2540 struct rpc_message msg = {
2541 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2542 .rpc_argp = &args,
2543 .rpc_resp = &res,
2544 };
008f55d0 2545
0e574af1 2546 nfs_fattr_init(info->fattr);
7c513058 2547 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2548}
2549
2550static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2551 struct nfs_fsinfo *info)
2552{
2553 struct nfs4_exception exception = { };
2554 int err;
2555 do {
fb8a5ba8
BS		 2556 err = _nfs4_lookup_root(server, fhandle, info);
2557 switch (err) {
2558 case 0:
2559 case -NFS4ERR_WRONGSEC:
05e9cfb4 2560 goto out;
fb8a5ba8
BS		 2561 default:
2562 err = nfs4_handle_exception(server, err, &exception);
2563 }
1da177e4 2564 } while (exception.retry);
05e9cfb4 2565out:
1da177e4
LT		 2566 return err;
2567}
2568
8f70e95f
BS		 2569static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2570 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2571{
2572 struct rpc_auth *auth;
2573 int ret;
2574
2575 auth = rpcauth_create(flavor, server->client);
e8d920c5 2576 if (IS_ERR(auth)) {
75bc8821 2577 ret = -EACCES;
8f70e95f
BS		 2578 goto out;
2579 }
2580 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2581out:
2582 return ret;
2583}
2584
9a744ba3
CL		 2585/*
2586 * Retry pseudoroot lookup with various security flavors. We do this when:
2587 *
2588 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2589 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2590 *
2591 * Returns zero on success, or a negative NFS4ERR value, or a
2592 * negative errno value.
2593 */
801a16dc 2594static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2595 struct nfs_fsinfo *info)
1da177e4 2596{
9a744ba3
CL		 2597 /* Per 3530bis 15.33.5 */
2598 static const rpc_authflavor_t flav_array[] = {
2599 RPC_AUTH_GSS_KRB5P,
2600 RPC_AUTH_GSS_KRB5I,
2601 RPC_AUTH_GSS_KRB5,
c4eafe11 2602 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2603 RPC_AUTH_NULL,
2604 };
2605 int status = -EPERM;
2606 size_t i;
6a1a1e34 2607
9a744ba3 2608 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2609 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2610 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2611 continue;
2612 break;
8f70e95f 2613 }
9a744ba3 2614
fb8a5ba8
BS		 2615 /*
2616 * -EACCESS could mean that the user doesn't have correct permissions
2617 * to access the mount. It could also mean that we tried to mount
2618 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2619 * existing mount programs don't handle -EACCES very well so it should
2620 * be mapped to -EPERM instead.
2621 */
2622 if (status == -EACCES)
2623 status = -EPERM;
801a16dc
BS		 2624 return status;
2625}
2626
2ed4b95b
CL		 2627static int nfs4_do_find_root_sec(struct nfs_server *server,
2628 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2629{
2630 int mv = server->nfs_client->cl_minorversion;
2631 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2632}
2633
2634/**
2635 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2636 * @server: initialized nfs_server handle
2637 * @fhandle: we fill in the pseudo-fs root file handle
2638 * @info: we fill in an FSINFO struct
2639 *
2640 * Returns zero on success, or a negative errno.
801a16dc 2641 */
3028eb2b
BS		 2642int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2643 struct nfs_fsinfo *info)
801a16dc 2644{
2ed4b95b
CL		 2645 int status;
2646
2647 status = nfs4_lookup_root(server, fhandle, info);
2648 if ((status == -NFS4ERR_WRONGSEC) &&
2649 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2650 status = nfs4_do_find_root_sec(server, fhandle, info);
2651
1da177e4
LT		 2652 if (status == 0)
2653 status = nfs4_server_capabilities(server, fhandle);
2654 if (status == 0)
2655 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2656
c12e87f4 2657 return nfs4_map_errors(status);
1da177e4
LT		 2658}
2659
bae36241
BS		 2660static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2661 struct nfs_fsinfo *info)
2662{
2663 int error;
2664 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2665 struct nfs4_label *label = NULL;
bae36241
BS		 2666
2667 error = nfs4_server_capabilities(server, mntfh);
2668 if (error < 0) {
2669 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2670 return error;
2671 }
2672
1775fd3e 2673 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2674 if (error < 0) {
2675 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2676 return error;
2677 }
2678
2679 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2680 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2681 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2682
2683 return error;
2684}
2685
6b97fd3d
MN		 2686/*
2687 * Get locations and (maybe) other attributes of a referral.
2688 * Note that we'll actually follow the referral later when
2689 * we detect fsid mismatch in inode revalidation
2690 */
f05d147f
BS		 2691static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2692 const struct qstr *name, struct nfs_fattr *fattr,
2693 struct nfs_fh *fhandle)
6b97fd3d
MN		 2694{
2695 int status = -ENOMEM;
2696 struct page *page = NULL;
2697 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2698
2699 page = alloc_page(GFP_KERNEL);
2700 if (page == NULL)
2701 goto out;
2702 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2703 if (locations == NULL)
2704 goto out;
2705
f05d147f 2706 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2707 if (status != 0)
2708 goto out;
2709 /* Make sure server returned a different fsid for the referral */
2710 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2711 dprintk("%s: server did not return a different fsid for"
2712 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2713 status = -EIO;
2714 goto out;
2715 }
533eb461
AA		 2716 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2717 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2718
533eb461 2719 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2720 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2721 memset(fhandle, 0, sizeof(struct nfs_fh));
2722out:
2723 if (page)
2724 __free_page(page);
5d7ca35a 2725 kfree(locations);
6b97fd3d
MN		 2726 return status;
2727}
2728
1775fd3e
DQ		 2729static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2730 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2731{
2732 struct nfs4_getattr_arg args = {
2733 .fh = fhandle,
2734 .bitmask = server->attr_bitmask,
2735 };
2736 struct nfs4_getattr_res res = {
2737 .fattr = fattr,
1775fd3e 2738 .label = label,
1da177e4
LT		 2739 .server = server,
2740 };
2741 struct rpc_message msg = {
2742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2743 .rpc_argp = &args,
2744 .rpc_resp = &res,
2745 };
2746
0e574af1 2747 nfs_fattr_init(fattr);
7c513058 2748 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2749}
2750
1775fd3e
DQ		 2751static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2752 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2753{
2754 struct nfs4_exception exception = { };
2755 int err;
2756 do {
2757 err = nfs4_handle_exception(server,
1775fd3e 2758 _nfs4_proc_getattr(server, fhandle, fattr, label),
1da177e4
LT		 2759 &exception);
2760 } while (exception.retry);
2761 return err;
2762}
2763
2764/*
2765 * The file is not closed if it is opened due to the a request to change
2766 * the size of the file. The open call will not be needed once the
2767 * VFS layer lookup-intents are implemented.
2768 *
2769 * Close is called when the inode is destroyed.
2770 * If we haven't opened the file for O_WRONLY, we
2771 * need to in the size_change case to obtain a stateid.
2772 *
2773 * Got race?
2774 * Because OPEN is always done by name in nfsv4, it is
2775 * possible that we opened a different file by the same
2776 * name. We can recognize this race condition, but we
2777 * can't do anything about it besides returning an error.
2778 *
2779 * This will be fixed with VFS changes (lookup-intent).
2780 */
2781static int
2782nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2783 struct iattr *sattr)
2784{
08e9eac4 2785 struct inode *inode = dentry->d_inode;
659bfcd6 2786 struct rpc_cred *cred = NULL;
d530838b 2787 struct nfs4_state *state = NULL;
1da177e4
LT		 2788 int status;
2789
8a1636c4 2790 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2791 pnfs_commit_and_return_layout(inode);
8a1636c4 2792
0e574af1 2793 nfs_fattr_init(fattr);
1da177e4 2794
2669940d
AA		 2795 /* Deal with open(O_TRUNC) */
2796 if (sattr->ia_valid & ATTR_OPEN)
2797 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2798
2799 /* Optimization: if the end result is no change, don't RPC */
2800 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2801 return 0;
2802
d530838b 2803 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2804 if (sattr->ia_valid & ATTR_FILE) {
2805 struct nfs_open_context *ctx;
2806
2807 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2808 if (ctx) {
2809 cred = ctx->cred;
2810 state = ctx->state;
2811 }
659bfcd6 2812 }
08e9eac4 2813
1775fd3e 2814 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, NULL);
65e4308d
TM		 2815 if (status == 0)
2816 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2817 return status;
2818}
2819
0c2e53f1
TM		 2820static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2821 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 2822 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 2823{
0c2e53f1 2824 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2825 int status;
2826 struct nfs4_lookup_arg args = {
2827 .bitmask = server->attr_bitmask,
0c2e53f1 2828 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2829 .name = name,
2830 };
2831 struct nfs4_lookup_res res = {
2832 .server = server,
2833 .fattr = fattr,
2834 .fh = fhandle,
2835 };
2836 struct rpc_message msg = {
2837 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2838 .rpc_argp = &args,
2839 .rpc_resp = &res,
2840 };
2841
2842 nfs_fattr_init(fattr);
2843
1da177e4 2844 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2845 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2846 dprintk("NFS reply lookup: %d\n", status);
2847 return status;
2848}
2849
72de53ec 2850static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2851{
7ebb9315 2852 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2853 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2854 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2855 fattr->nlink = 2;
2856}
2857
72de53ec
BS		 2858static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2859 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 2860 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2861{
2862 struct nfs4_exception exception = { };
72de53ec 2863 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2864 int err;
2865 do {
1775fd3e 2866 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
72de53ec 2867 switch (err) {
08ef7bd3 2868 case -NFS4ERR_BADNAME:
72de53ec
BS		 2869 err = -ENOENT;
2870 goto out;
0c2e53f1 2871 case -NFS4ERR_MOVED:
f05d147f 2872 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2873 goto out;
0c2e53f1 2874 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2875 err = -EPERM;
2876 if (client != *clnt)
2877 goto out;
2878
2879 client = nfs4_create_sec_client(client, dir, name);
2880 if (IS_ERR(client))
2881 return PTR_ERR(client);
2882
2883 exception.retry = 1;
2884 break;
2885 default:
2886 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2887 }
1da177e4 2888 } while (exception.retry);
72de53ec
BS		 2889
2890out:
2891 if (err == 0)
2892 *clnt = client;
2893 else if (client != *clnt)
2894 rpc_shutdown_client(client);
2895
1da177e4
LT		 2896 return err;
2897}
2898
80a16b21 2899static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 2900 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
2901 struct nfs4_label *label)
72de53ec
BS		 2902{
2903 int status;
2904 struct rpc_clnt *client = NFS_CLIENT(dir);
2905
1775fd3e 2906 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 2907 if (client != NFS_CLIENT(dir)) {
2908 rpc_shutdown_client(client);
2909 nfs_fixup_secinfo_attributes(fattr);
2910 }
2911 return status;
2912}
2913
f05d147f
BS		 2914struct rpc_clnt *
2915nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2916 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2917{
2918 int status;
2919 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2920
1775fd3e 2921 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 2922 if (status < 0) {
2923 rpc_shutdown_client(client);
2924 return ERR_PTR(status);
2925 }
2926 return client;
2927}
2928
1da177e4
LT		 2929static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2930{
76b32999 2931 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2932 struct nfs4_accessargs args = {
2933 .fh = NFS_FH(inode),
a4980e78 2934 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2935 };
2936 struct nfs4_accessres res = {
2937 .server = server,
1da177e4 2938 };
1da177e4
LT		 2939 struct rpc_message msg = {
2940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2941 .rpc_argp = &args,
2942 .rpc_resp = &res,
2943 .rpc_cred = entry->cred,
2944 };
2945 int mode = entry->mask;
2946 int status;
2947
2948 /*
2949 * Determine which access bits we want to ask for...
2950 */
2951 if (mode & MAY_READ)
2952 args.access |= NFS4_ACCESS_READ;
2953 if (S_ISDIR(inode->i_mode)) {
2954 if (mode & MAY_WRITE)
2955 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2956 if (mode & MAY_EXEC)
2957 args.access |= NFS4_ACCESS_LOOKUP;
2958 } else {
2959 if (mode & MAY_WRITE)
2960 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2961 if (mode & MAY_EXEC)
2962 args.access |= NFS4_ACCESS_EXECUTE;
2963 }
c407d41a
TM		 2964
2965 res.fattr = nfs_alloc_fattr();
2966 if (res.fattr == NULL)
2967 return -ENOMEM;
2968
7c513058 2969 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2970 if (!status) {
6168f62c 2971 nfs_access_set_mask(entry, res.access);
c407d41a 2972 nfs_refresh_inode(inode, res.fattr);
1da177e4 2973 }
c407d41a 2974 nfs_free_fattr(res.fattr);
1da177e4
LT		 2975 return status;
2976}
2977
2978static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2979{
2980 struct nfs4_exception exception = { };
2981 int err;
2982 do {
2983 err = nfs4_handle_exception(NFS_SERVER(inode),
2984 _nfs4_proc_access(inode, entry),
2985 &exception);
2986 } while (exception.retry);
2987 return err;
2988}
2989
2990/*
2991 * TODO: For the time being, we don't try to get any attributes
2992 * along with any of the zero-copy operations READ, READDIR,
2993 * READLINK, WRITE.
2994 *
2995 * In the case of the first three, we want to put the GETATTR
2996 * after the read-type operation -- this is because it is hard
2997 * to predict the length of a GETATTR response in v4, and thus
2998 * align the READ data correctly. This means that the GETATTR
2999 * may end up partially falling into the page cache, and we should
3000 * shift it into the 'tail' of the xdr_buf before processing.
3001 * To do this efficiently, we need to know the total length
3002 * of data received, which doesn't seem to be available outside
3003 * of the RPC layer.
3004 *
3005 * In the case of WRITE, we also want to put the GETATTR after
3006 * the operation -- in this case because we want to make sure
140150db 3007 * we get the post-operation mtime and size.
1da177e4
LT		 3008 *
3009 * Both of these changes to the XDR layer would in fact be quite
3010 * minor, but I decided to leave them for a subsequent patch.
3011 */
3012static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3013 unsigned int pgbase, unsigned int pglen)
3014{
3015 struct nfs4_readlink args = {
3016 .fh = NFS_FH(inode),
3017 .pgbase = pgbase,
3018 .pglen = pglen,
3019 .pages = &page,
3020 };
f50c7000 3021 struct nfs4_readlink_res res;
1da177e4
LT		 3022 struct rpc_message msg = {
3023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3024 .rpc_argp = &args,
f50c7000 3025 .rpc_resp = &res,
1da177e4
LT		 3026 };
3027
7c513058 3028 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3029}
3030
3031static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3032 unsigned int pgbase, unsigned int pglen)
3033{
3034 struct nfs4_exception exception = { };
3035 int err;
3036 do {
3037 err = nfs4_handle_exception(NFS_SERVER(inode),
3038 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3039 &exception);
3040 } while (exception.retry);
3041 return err;
3042}
3043
1da177e4 3044/*
8867fe58 3045 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3046 */
1da177e4
LT		 3047static int
3048nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3049 int flags)
1da177e4 3050{
1775fd3e 3051 struct nfs4_label *ilabel = NULL;
8867fe58 3052 struct nfs_open_context *ctx;
1da177e4 3053 struct nfs4_state *state;
1da177e4
LT		 3054 int status = 0;
3055
8867fe58
MS		 3056 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3057 if (IS_ERR(ctx))
3058 return PTR_ERR(ctx);
3059
a8a5da99 3060 sattr->ia_mode &= ~current_umask();
8626e4a4 3061 state = nfs4_do_open(dir, dentry, ctx->mode,
1775fd3e 3062 flags, sattr, ilabel, ctx->cred,
8626e4a4 3063 &ctx->mdsthreshold);
d4d9cdcb 3064 d_drop(dentry);
1da177e4
LT		 3065 if (IS_ERR(state)) {
3066 status = PTR_ERR(state);
c0204fd2 3067 goto out;
1da177e4 3068 }
d4d9cdcb 3069 d_add(dentry, igrab(state->inode));
d75340cc 3070 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3071 ctx->state = state;
1da177e4 3072out:
8867fe58 3073 put_nfs_open_context(ctx);
1da177e4
LT		 3074 return status;
3075}
3076
3077static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3078{
16e42959 3079 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3080 struct nfs_removeargs args = {
1da177e4 3081 .fh = NFS_FH(dir),
26fe5750 3082 .name = *name,
16e42959 3083 };
4fdc17b2 3084 struct nfs_removeres res = {
16e42959 3085 .server = server,
1da177e4 3086 };
1da177e4 3087 struct rpc_message msg = {
4fdc17b2
TM		 3088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3089 .rpc_argp = &args,
3090 .rpc_resp = &res,
1da177e4 3091 };
778d2817 3092 int status;
1da177e4 3093
7c513058 3094 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3095 if (status == 0)
16e42959 3096 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3097 return status;
3098}
3099
3100static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3101{
3102 struct nfs4_exception exception = { };
3103 int err;
3104 do {
3105 err = nfs4_handle_exception(NFS_SERVER(dir),
3106 _nfs4_proc_remove(dir, name),
3107 &exception);
3108 } while (exception.retry);
3109 return err;
3110}
3111
e4eff1a6 3112static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3113{
e4eff1a6
TM		 3114 struct nfs_server *server = NFS_SERVER(dir);
3115 struct nfs_removeargs *args = msg->rpc_argp;
3116 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3117
e4eff1a6 3118 res->server = server;
1da177e4 3119 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3120 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3121}
3122
34e137cc
BS		 3123static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3124{
d9afbd1b
TM		 3125 nfs4_setup_sequence(NFS_SERVER(data->dir),
3126 &data->args.seq_args,
3127 &data->res.seq_res,
3128 task);
1da177e4
LT		 3129}
3130
e4eff1a6 3131static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3132{
e4eff1a6
TM		 3133 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3134
14516c3a
TM		 3135 if (!nfs4_sequence_done(task, &res->seq_res))
3136 return 0;
9e33bed5 3137 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3138 return 0;
3139 update_changeattr(dir, &res->cinfo);
e4eff1a6 3140 return 1;
1da177e4
LT		 3141}
3142
d3d4152a
JL		 3143static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3144{
3145 struct nfs_server *server = NFS_SERVER(dir);
3146 struct nfs_renameargs *arg = msg->rpc_argp;
3147 struct nfs_renameres *res = msg->rpc_resp;
3148
3149 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3150 res->server = server;
9d12b216 3151 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3152}
3153
c6bfa1a1
BS		 3154static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3155{
d9afbd1b
TM		 3156 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3157 &data->args.seq_args,
3158 &data->res.seq_res,
3159 task);
d3d4152a
JL		 3160}
3161
3162static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3163 struct inode *new_dir)
3164{
3165 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3166
3167 if (!nfs4_sequence_done(task, &res->seq_res))
3168 return 0;
3169 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3170 return 0;
3171
3172 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3173 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3174 return 1;
3175}
3176
1da177e4
LT		 3177static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3178 struct inode *new_dir, struct qstr *new_name)
3179{
6caf2c82 3180 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3181 struct nfs_renameargs arg = {
1da177e4
LT		 3182 .old_dir = NFS_FH(old_dir),
3183 .new_dir = NFS_FH(new_dir),
3184 .old_name = old_name,
3185 .new_name = new_name,
6caf2c82 3186 };
e8582a8b 3187 struct nfs_renameres res = {
6caf2c82 3188 .server = server,
1da177e4 3189 };
1da177e4
LT		 3190 struct rpc_message msg = {
3191 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3192 .rpc_argp = &arg,
3193 .rpc_resp = &res,
3194 };
011fff72 3195 int status = -ENOMEM;
1da177e4 3196
7c513058 3197 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3198 if (!status) {
3199 update_changeattr(old_dir, &res.old_cinfo);
3200 update_changeattr(new_dir, &res.new_cinfo);
3201 }
3202 return status;
3203}
3204
3205static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3206 struct inode *new_dir, struct qstr *new_name)
3207{
3208 struct nfs4_exception exception = { };
3209 int err;
3210 do {
3211 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3212 _nfs4_proc_rename(old_dir, old_name,
3213 new_dir, new_name),
3214 &exception);
3215 } while (exception.retry);
3216 return err;
3217}
3218
3219static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3220{
91ba2eee 3221 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3222 struct nfs4_link_arg arg = {
3223 .fh = NFS_FH(inode),
3224 .dir_fh = NFS_FH(dir),
3225 .name = name,
91ba2eee
TM		 3226 .bitmask = server->attr_bitmask,
3227 };
91ba2eee
TM		 3228 struct nfs4_link_res res = {
3229 .server = server,
1775fd3e 3230 .label = NULL,
1da177e4 3231 };
1da177e4
LT		 3232 struct rpc_message msg = {
3233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3234 .rpc_argp = &arg,
91ba2eee 3235 .rpc_resp = &res,
1da177e4 3236 };
136f2627
TM		 3237 int status = -ENOMEM;
3238
3239 res.fattr = nfs_alloc_fattr();
778d2817 3240 if (res.fattr == NULL)
136f2627 3241 goto out;
1da177e4 3242
7c513058 3243 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3244 if (!status) {
3245 update_changeattr(dir, &res.cinfo);
73a3d07c 3246 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3247 }
136f2627 3248out:
136f2627 3249 nfs_free_fattr(res.fattr);
1da177e4
LT		 3250 return status;
3251}
3252
3253static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3254{
3255 struct nfs4_exception exception = { };
3256 int err;
3257 do {
3258 err = nfs4_handle_exception(NFS_SERVER(inode),
3259 _nfs4_proc_link(inode, dir, name),
3260 &exception);
3261 } while (exception.retry);
3262 return err;
3263}
3264
57dc9a57
TM		 3265struct nfs4_createdata {
3266 struct rpc_message msg;
3267 struct nfs4_create_arg arg;
3268 struct nfs4_create_res res;
3269 struct nfs_fh fh;
3270 struct nfs_fattr fattr;
1775fd3e 3271 struct nfs4_label *label;
57dc9a57
TM		 3272};
3273
3274static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3275 struct qstr *name, struct iattr *sattr, u32 ftype)
3276{
3277 struct nfs4_createdata *data;
3278
3279 data = kzalloc(sizeof(*data), GFP_KERNEL);
3280 if (data != NULL) {
3281 struct nfs_server *server = NFS_SERVER(dir);
3282
3283 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3284 data->msg.rpc_argp = &data->arg;
3285 data->msg.rpc_resp = &data->res;
3286 data->arg.dir_fh = NFS_FH(dir);
3287 data->arg.server = server;
3288 data->arg.name = name;
3289 data->arg.attrs = sattr;
3290 data->arg.ftype = ftype;
3291 data->arg.bitmask = server->attr_bitmask;
3292 data->res.server = server;
3293 data->res.fh = &data->fh;
3294 data->res.fattr = &data->fattr;
1775fd3e 3295 data->res.label = data->label;
57dc9a57 3296 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3297 }
3298 return data;
3299}
3300
3301static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3302{
7c513058 3303 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3304 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3305 if (status == 0) {
3306 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3307 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3308 }
3309 return status;
3310}
3311
3312static void nfs4_free_createdata(struct nfs4_createdata *data)
3313{
3314 kfree(data);
3315}
3316
4f390c15 3317static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3318 struct page *page, unsigned int len, struct iattr *sattr,
3319 struct nfs4_label *label)
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;
1775fd3e 3335 data->arg.label = label;
1da177e4 3336
57dc9a57
TM		 3337 status = nfs4_do_create(dir, dentry, data);
3338
3339 nfs4_free_createdata(data);
3340out:
1da177e4
LT		 3341 return status;
3342}
3343
4f390c15 3344static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3345 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3346{
3347 struct nfs4_exception exception = { };
1775fd3e 3348 struct nfs4_label *label = NULL;
1da177e4
LT		 3349 int err;
3350 do {
3351 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753 3352 _nfs4_proc_symlink(dir, dentry, page,
1775fd3e 3353 len, sattr, label),
1da177e4
LT		 3354 &exception);
3355 } while (exception.retry);
3356 return err;
3357}
3358
3359static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3360 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3361{
57dc9a57
TM		 3362 struct nfs4_createdata *data;
3363 int status = -ENOMEM;
1da177e4 3364
57dc9a57
TM		 3365 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3366 if (data == NULL)
3367 goto out;
3368
1775fd3e 3369 data->arg.label = label;
57dc9a57
TM		 3370 status = nfs4_do_create(dir, dentry, data);
3371
3372 nfs4_free_createdata(data);
3373out:
1da177e4
LT		 3374 return status;
3375}
3376
3377static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3378 struct iattr *sattr)
3379{
3380 struct nfs4_exception exception = { };
1775fd3e 3381 struct nfs4_label *label = NULL;
1da177e4 3382 int err;
a8a5da99
AK		 3383
3384 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3385 do {
3386 err = nfs4_handle_exception(NFS_SERVER(dir),
1775fd3e 3387 _nfs4_proc_mkdir(dir, dentry, sattr, label),
1da177e4
LT		 3388 &exception);
3389 } while (exception.retry);
3390 return err;
3391}
3392
3393static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3394 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3395{
3396 struct inode *dir = dentry->d_inode;
3397 struct nfs4_readdir_arg args = {
3398 .fh = NFS_FH(dir),
56e4ebf8 3399 .pages = pages,
1da177e4
LT		 3400 .pgbase = 0,
3401 .count = count,
96d25e53 3402 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3403 .plus = plus,
1da177e4
LT		 3404 };
3405 struct nfs4_readdir_res res;
3406 struct rpc_message msg = {
3407 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3408 .rpc_argp = &args,
3409 .rpc_resp = &res,
3410 .rpc_cred = cred,
3411 };
3412 int status;
3413
3110ff80 3414 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3415 dentry->d_parent->d_name.name,
3416 dentry->d_name.name,
3417 (unsigned long long)cookie);
c3f52af3 3418 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3419 res.pgbase = args.pgbase;
7c513058 3420 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3421 if (status >= 0) {
c3f52af3 3422 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3423 status += args.pgbase;
3424 }
c4812998
TM		 3425
3426 nfs_invalidate_atime(dir);
3427
3110ff80 3428 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3429 return status;
3430}
3431
3432static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3433 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3434{
3435 struct nfs4_exception exception = { };
3436 int err;
3437 do {
3438 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3439 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3440 pages, count, plus),
1da177e4
LT		 3441 &exception);
3442 } while (exception.retry);
3443 return err;
3444}
3445
3446static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3447 struct iattr *sattr, dev_t rdev)
3448{
57dc9a57
TM		 3449 struct nfs4_createdata *data;
3450 int mode = sattr->ia_mode;
3451 int status = -ENOMEM;
1da177e4 3452
57dc9a57
TM		 3453 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3454 if (data == NULL)
3455 goto out;
3456
1da177e4 3457 if (S_ISFIFO(mode))
57dc9a57 3458 data->arg.ftype = NF4FIFO;
1da177e4 3459 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3460 data->arg.ftype = NF4BLK;
3461 data->arg.u.device.specdata1 = MAJOR(rdev);
3462 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3463 }
3464 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3465 data->arg.ftype = NF4CHR;
3466 data->arg.u.device.specdata1 = MAJOR(rdev);
3467 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3468 } else if (!S_ISSOCK(mode)) {
3469 status = -EINVAL;
3470 goto out_free;
1da177e4 3471 }
1775fd3e 3472
57dc9a57 3473 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3474out_free:
57dc9a57
TM		 3475 nfs4_free_createdata(data);
3476out:
1da177e4
LT		 3477 return status;
3478}
3479
3480static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3481 struct iattr *sattr, dev_t rdev)
3482{
3483 struct nfs4_exception exception = { };
3484 int err;
a8a5da99
AK		 3485
3486 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3487 do {
3488 err = nfs4_handle_exception(NFS_SERVER(dir),
3489 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3490 &exception);
3491 } while (exception.retry);
3492 return err;
3493}
3494
3495static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3496 struct nfs_fsstat *fsstat)
3497{
3498 struct nfs4_statfs_arg args = {
3499 .fh = fhandle,
3500 .bitmask = server->attr_bitmask,
3501 };
24ad148a
BH		 3502 struct nfs4_statfs_res res = {
3503 .fsstat = fsstat,
3504 };
1da177e4
LT		 3505 struct rpc_message msg = {
3506 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3507 .rpc_argp = &args,
24ad148a 3508 .rpc_resp = &res,
1da177e4
LT		 3509 };
3510
0e574af1 3511 nfs_fattr_init(fsstat->fattr);
7c513058 3512 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3513}
3514
3515static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3516{
3517 struct nfs4_exception exception = { };
3518 int err;
3519 do {
3520 err = nfs4_handle_exception(server,
3521 _nfs4_proc_statfs(server, fhandle, fsstat),
3522 &exception);
3523 } while (exception.retry);
3524 return err;
3525}
3526
3527static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3528 struct nfs_fsinfo *fsinfo)
3529{
3530 struct nfs4_fsinfo_arg args = {
3531 .fh = fhandle,
3532 .bitmask = server->attr_bitmask,
3533 };
3dda5e43
BH		 3534 struct nfs4_fsinfo_res res = {
3535 .fsinfo = fsinfo,
3536 };
1da177e4
LT		 3537 struct rpc_message msg = {
3538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3539 .rpc_argp = &args,
3dda5e43 3540 .rpc_resp = &res,
1da177e4
LT		 3541 };
3542
7c513058 3543 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3544}
3545
3546static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3547{
3548 struct nfs4_exception exception = { };
83ca7f5a 3549 unsigned long now = jiffies;
1da177e4
LT		 3550 int err;
3551
3552 do {
83ca7f5a
CL		 3553 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3554 if (err == 0) {
3555 struct nfs_client *clp = server->nfs_client;
3556
3557 spin_lock(&clp->cl_lock);
3558 clp->cl_lease_time = fsinfo->lease_time * HZ;
3559 clp->cl_last_renewal = now;
3560 spin_unlock(&clp->cl_lock);
3561 break;
3562 }
3563 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3564 } while (exception.retry);
3565 return err;
3566}
3567
3568static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3569{
e38eb650
BS		 3570 int error;
3571
0e574af1 3572 nfs_fattr_init(fsinfo->fattr);
e38eb650 3573 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3574 if (error == 0) {
3575 /* block layout checks this! */
3576 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3577 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3578 }
e38eb650
BS		 3579
3580 return error;
1da177e4
LT		 3581}
3582
3583static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3584 struct nfs_pathconf *pathconf)
3585{
3586 struct nfs4_pathconf_arg args = {
3587 .fh = fhandle,
3588 .bitmask = server->attr_bitmask,
3589 };
d45b2989
BH		 3590 struct nfs4_pathconf_res res = {
3591 .pathconf = pathconf,
3592 };
1da177e4
LT		 3593 struct rpc_message msg = {
3594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3595 .rpc_argp = &args,
d45b2989 3596 .rpc_resp = &res,
1da177e4
LT		 3597 };
3598
3599 /* None of the pathconf attributes are mandatory to implement */
3600 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3601 memset(pathconf, 0, sizeof(*pathconf));
3602 return 0;
3603 }
3604
0e574af1 3605 nfs_fattr_init(pathconf->fattr);
7c513058 3606 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3607}
3608
3609static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3610 struct nfs_pathconf *pathconf)
3611{
3612 struct nfs4_exception exception = { };
3613 int err;
3614
3615 do {
3616 err = nfs4_handle_exception(server,
3617 _nfs4_proc_pathconf(server, fhandle, pathconf),
3618 &exception);
3619 } while (exception.retry);
3620 return err;
3621}
3622
5521abfd 3623int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3624 const struct nfs_open_context *ctx,
3625 const struct nfs_lock_context *l_ctx,
3626 fmode_t fmode)
3627{
3628 const struct nfs_lockowner *lockowner = NULL;
3629
3630 if (l_ctx != NULL)
3631 lockowner = &l_ctx->lockowner;
5521abfd 3632 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3633}
3634EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3635
5521abfd
TM		 3636static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3637 const struct nfs_open_context *ctx,
3638 const struct nfs_lock_context *l_ctx,
3639 fmode_t fmode)
3640{
3641 nfs4_stateid current_stateid;
3642
3643 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3644 return false;
3645 return nfs4_stateid_match(stateid, &current_stateid);
3646}
3647
3648static bool nfs4_error_stateid_expired(int err)
3649{
3650 switch (err) {
3651 case -NFS4ERR_DELEG_REVOKED:
3652 case -NFS4ERR_ADMIN_REVOKED:
3653 case -NFS4ERR_BAD_STATEID:
3654 case -NFS4ERR_STALE_STATEID:
3655 case -NFS4ERR_OLD_STATEID:
3656 case -NFS4ERR_OPENMODE:
3657 case -NFS4ERR_EXPIRED:
3658 return true;
3659 }
3660 return false;
3661}
3662
d20581aa
BH		 3663void __nfs4_read_done_cb(struct nfs_read_data *data)
3664{
cd841605 3665 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3666}
3667
cbdabc7f 3668static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3669{
cd841605 3670 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3671
9e33bed5 3672 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3673 rpc_restart_call_prepare(task);
ec06c096 3674 return -EAGAIN;
1da177e4 3675 }
8850df99 3676
d20581aa 3677 __nfs4_read_done_cb(data);
1da177e4 3678 if (task->tk_status > 0)
ec06c096
TM		 3679 renew_lease(server, data->timestamp);
3680 return 0;
1da177e4
LT		 3681}
3682
5521abfd
TM		 3683static bool nfs4_read_stateid_changed(struct rpc_task *task,
3684 struct nfs_readargs *args)
3685{
3686
3687 if (!nfs4_error_stateid_expired(task->tk_status) ||
3688 nfs4_stateid_is_current(&args->stateid,
3689 args->context,
3690 args->lock_context,
3691 FMODE_READ))
3692 return false;
3693 rpc_restart_call_prepare(task);
3694 return true;
3695}
3696
cbdabc7f
AA		 3697static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3698{
3699
3700 dprintk("--> %s\n", __func__);
3701
3702 if (!nfs4_sequence_done(task, &data->res.seq_res))
3703 return -EAGAIN;
5521abfd
TM		 3704 if (nfs4_read_stateid_changed(task, &data->args))
3705 return -EAGAIN;
d20581aa
BH		 3706 return data->read_done_cb ? data->read_done_cb(task, data) :
3707 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3708}
3709
bdc7f021 3710static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3711{
1da177e4 3712 data->timestamp = jiffies;
cbdabc7f 3713 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3714 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3715 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3716}
3717
ea7c3303
BS		 3718static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3719{
9b206149 3720 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3721 &data->args.seq_args,
3722 &data->res.seq_res,
9b206149
TM		 3723 task))
3724 return;
3725 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3726 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3727}
3728
b029bc9b 3729static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3730{
cd841605 3731 struct inode *inode = data->header->inode;
1da177e4 3732
9e33bed5 3733 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3734 rpc_restart_call_prepare(task);
788e7a89 3735 return -EAGAIN;
1da177e4 3736 }
4f9838c7 3737 if (task->tk_status >= 0) {
1da177e4 3738 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3739 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3740 }
788e7a89 3741 return 0;
1da177e4
LT		 3742}
3743
5521abfd
TM		 3744static bool nfs4_write_stateid_changed(struct rpc_task *task,
3745 struct nfs_writeargs *args)
3746{
3747
3748 if (!nfs4_error_stateid_expired(task->tk_status) ||
3749 nfs4_stateid_is_current(&args->stateid,
3750 args->context,
3751 args->lock_context,
3752 FMODE_WRITE))
3753 return false;
3754 rpc_restart_call_prepare(task);
3755 return true;
3756}
3757
b029bc9b
FI		 3758static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3759{
3760 if (!nfs4_sequence_done(task, &data->res.seq_res))
3761 return -EAGAIN;
5521abfd
TM		 3762 if (nfs4_write_stateid_changed(task, &data->args))
3763 return -EAGAIN;
d20581aa
BH		 3764 return data->write_done_cb ? data->write_done_cb(task, data) :
3765 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3766}
3767
5a37f851
TM		 3768static
3769bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3770{
5a37f851
TM		 3771 const struct nfs_pgio_header *hdr = data->header;
3772
3773 /* Don't request attributes for pNFS or O_DIRECT writes */
3774 if (data->ds_clp != NULL || hdr->dreq != NULL)
3775 return false;
3776 /* Otherwise, request attributes if and only if we don't hold
3777 * a delegation
3778 */
011e2a7f 3779 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3780}
a69aef14 3781
bdc7f021 3782static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3783{
cd841605 3784 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3785
5a37f851 3786 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3787 data->args.bitmask = NULL;
3788 data->res.fattr = NULL;
3789 } else
3790 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3791
b029bc9b
FI		 3792 if (!data->write_done_cb)
3793 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3794 data->res.server = server;
1da177e4
LT		 3795 data->timestamp = jiffies;
3796
bdc7f021 3797 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3798 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3799}
3800
c6cb80d0
BS		 3801static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3802{
9b206149 3803 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3804 &data->args.seq_args,
3805 &data->res.seq_res,
9b206149
TM		 3806 task))
3807 return;
3808 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3809 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3810}
3811
0b7c0153 3812static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3813{
d9afbd1b
TM		 3814 nfs4_setup_sequence(NFS_SERVER(data->inode),
3815 &data->args.seq_args,
3816 &data->res.seq_res,
3817 task);
1da177e4
LT		 3818}
3819
0b7c0153 3820static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3821{
1da177e4 3822 struct inode *inode = data->inode;
14516c3a 3823
9e33bed5 3824 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3825 rpc_restart_call_prepare(task);
788e7a89 3826 return -EAGAIN;
1da177e4 3827 }
788e7a89 3828 return 0;
1da177e4
LT		 3829}
3830
0b7c0153 3831static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3832{
3833 if (!nfs4_sequence_done(task, &data->res.seq_res))
3834 return -EAGAIN;
0b7c0153 3835 return data->commit_done_cb(task, data);
5f452431
FI		 3836}
3837
0b7c0153 3838static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3839{
788e7a89 3840 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3841
0b7c0153
FI		 3842 if (data->commit_done_cb == NULL)
3843 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3844 data->res.server = server;
bdc7f021 3845 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3846 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3847}
3848
9bc4e3ca
CL		 3849struct nfs4_renewdata {
3850 struct nfs_client *client;
3851 unsigned long timestamp;
3852};
3853
1da177e4
LT		 3854/*
3855 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3856 * standalone procedure for queueing an asynchronous RENEW.
3857 */
9bc4e3ca 3858static void nfs4_renew_release(void *calldata)
dc96aef9 3859{
9bc4e3ca
CL		 3860 struct nfs4_renewdata *data = calldata;
3861 struct nfs_client *clp = data->client;
dc96aef9 3862
0851de06
AB		 3863 if (atomic_read(&clp->cl_count) > 1)
3864 nfs4_schedule_state_renewal(clp);
3865 nfs_put_client(clp);
9bc4e3ca 3866 kfree(data);
dc96aef9
AB		 3867}
3868
9bc4e3ca 3869static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3870{
9bc4e3ca
CL		 3871 struct nfs4_renewdata *data = calldata;
3872 struct nfs_client *clp = data->client;
3873 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3874
3875 if (task->tk_status < 0) {
95baa25c 3876 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3877 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3878 return;
3879 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3880 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3881 return;
3882 }
3883 nfs4_schedule_path_down_recovery(clp);
1da177e4 3884 }
452e9352 3885 do_renew_lease(clp, timestamp);
1da177e4
LT		 3886}
3887
963d8fe5
TM		 3888static const struct rpc_call_ops nfs4_renew_ops = {
3889 .rpc_call_done = nfs4_renew_done,
dc96aef9 3890 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3891};
3892
2f60ea6b 3893static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3894{
3895 struct rpc_message msg = {
3896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3897 .rpc_argp = clp,
b4454fe1 3898 .rpc_cred = cred,
1da177e4 3899 };
9bc4e3ca 3900 struct nfs4_renewdata *data;
1da177e4 3901
2f60ea6b
TM		 3902 if (renew_flags == 0)
3903 return 0;
0851de06
AB		 3904 if (!atomic_inc_not_zero(&clp->cl_count))
3905 return -EIO;
b569ad34 3906 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3907 if (data == NULL)
3908 return -ENOMEM;
3909 data->client = clp;
3910 data->timestamp = jiffies;
bc7a05ca 3911 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3912 &nfs4_renew_ops, data);
1da177e4
LT		 3913}
3914
8534d4ec 3915static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3916{
3917 struct rpc_message msg = {
3918 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3919 .rpc_argp = clp,
b4454fe1 3920 .rpc_cred = cred,
1da177e4
LT		 3921 };
3922 unsigned long now = jiffies;
3923 int status;
3924
bc7a05ca 3925 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3926 if (status < 0)
3927 return status;
452e9352 3928 do_renew_lease(clp, now);
1da177e4
LT		 3929 return 0;
3930}
3931
aa1870af
BF		 3932static inline int nfs4_server_supports_acls(struct nfs_server *server)
3933{
3934 return (server->caps & NFS_CAP_ACLS)
3935 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3936 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3937}
3938
21f498c2
TM		 3939/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3940 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3941 * the stack.
3942 */
21f498c2 3943#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3944
e9e3d724
NH		 3945static int buf_to_pages_noslab(const void *buf, size_t buflen,
3946 struct page **pages, unsigned int *pgbase)
3947{
3948 struct page *newpage, **spages;
3949 int rc = 0;
3950 size_t len;
3951 spages = pages;
3952
3953 do {
21f498c2 3954 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3955 newpage = alloc_page(GFP_KERNEL);
3956
3957 if (newpage == NULL)
3958 goto unwind;
3959 memcpy(page_address(newpage), buf, len);
3960 buf += len;
3961 buflen -= len;
3962 *pages++ = newpage;
3963 rc++;
3964 } while (buflen != 0);
3965
3966 return rc;
3967
3968unwind:
3969 for(; rc > 0; rc--)
3970 __free_page(spages[rc-1]);
3971 return -ENOMEM;
3972}
3973
e50a1c2e
BF		 3974struct nfs4_cached_acl {
3975 int cached;
3976 size_t len;
3e9d4154 3977 char data[0];
e50a1c2e
BF		 3978};
3979
3980static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3981{
3982 struct nfs_inode *nfsi = NFS_I(inode);
3983
3984 spin_lock(&inode->i_lock);
3985 kfree(nfsi->nfs4_acl);
3986 nfsi->nfs4_acl = acl;
3987 spin_unlock(&inode->i_lock);
3988}
3989
3990static void nfs4_zap_acl_attr(struct inode *inode)
3991{
3992 nfs4_set_cached_acl(inode, NULL);
3993}
3994
3995static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3996{
3997 struct nfs_inode *nfsi = NFS_I(inode);
3998 struct nfs4_cached_acl *acl;
3999 int ret = -ENOENT;
4000
4001 spin_lock(&inode->i_lock);
4002 acl = nfsi->nfs4_acl;
4003 if (acl == NULL)
4004 goto out;
4005 if (buf == NULL) /* user is just asking for length */
4006 goto out_len;
4007 if (acl->cached == 0)
4008 goto out;
4009 ret = -ERANGE; /* see getxattr(2) man page */
4010 if (acl->len > buflen)
4011 goto out;
4012 memcpy(buf, acl->data, acl->len);
4013out_len:
4014 ret = acl->len;
4015out:
4016 spin_unlock(&inode->i_lock);
4017 return ret;
4018}
4019
5794d21e 4020static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4021{
4022 struct nfs4_cached_acl *acl;
b291f1b1 4023 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4024
1f1ea6c2 4025 if (buflen <= PAGE_SIZE) {
b291f1b1 4026 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4027 if (acl == NULL)
4028 goto out;
4029 acl->cached = 1;
5794d21e 4030 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4031 } else {
4032 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4033 if (acl == NULL)
4034 goto out;
4035 acl->cached = 0;
4036 }
4037 acl->len = acl_len;
4038out:
4039 nfs4_set_cached_acl(inode, acl);
4040}
4041
bf118a34
AA		 4042/*
4043 * The getxattr API returns the required buffer length when called with a
4044 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4045 * the required buf. On a NULL buf, we send a page of data to the server
4046 * guessing that the ACL request can be serviced by a page. If so, we cache
4047 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4048 * the cache. If not so, we throw away the page, and cache the required
4049 * length. The next getxattr call will then produce another round trip to
4050 * the server, this time with the input buf of the required size.
4051 */
16b4289c 4052static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4053{
bf118a34 4054 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4055 struct nfs_getaclargs args = {
4056 .fh = NFS_FH(inode),
4057 .acl_pages = pages,
4058 .acl_len = buflen,
4059 };
663c79b3
BH		 4060 struct nfs_getaclres res = {
4061 .acl_len = buflen,
4062 };
aa1870af
BF		 4063 struct rpc_message msg = {
4064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4065 .rpc_argp = &args,
663c79b3 4066 .rpc_resp = &res,
aa1870af 4067 };
21f498c2
TM		 4068 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4069 int ret = -ENOMEM, i;
aa1870af 4070
bf118a34
AA		 4071 /* As long as we're doing a round trip to the server anyway,
4072 * let's be prepared for a page of acl data. */
4073 if (npages == 0)
4074 npages = 1;
21f498c2
TM		 4075 if (npages > ARRAY_SIZE(pages))
4076 return -ERANGE;
5a006899 4077
bf118a34
AA		 4078 for (i = 0; i < npages; i++) {
4079 pages[i] = alloc_page(GFP_KERNEL);
4080 if (!pages[i])
4081 goto out_free;
e50a1c2e 4082 }
5a006899
SP		 4083
4084 /* for decoding across pages */
4085 res.acl_scratch = alloc_page(GFP_KERNEL);
4086 if (!res.acl_scratch)
4087 goto out_free;
4088
bf118a34
AA		 4089 args.acl_len = npages * PAGE_SIZE;
4090 args.acl_pgbase = 0;
5a006899 4091
de040bec 4092 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4093 __func__, buf, buflen, npages, args.acl_len);
4094 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4095 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4096 if (ret)
4097 goto out_free;
bf118a34 4098
1f1ea6c2
TM		 4099 /* Handle the case where the passed-in buffer is too short */
4100 if (res.acl_flags & NFS4_ACL_TRUNC) {
4101 /* Did the user only issue a request for the acl length? */
4102 if (buf == NULL)
4103 goto out_ok;
e50a1c2e 4104 ret = -ERANGE;
1f1ea6c2 4105 goto out_free;
e50a1c2e 4106 }
1f1ea6c2 4107 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4108 if (buf) {
4109 if (res.acl_len > buflen) {
4110 ret = -ERANGE;
4111 goto out_free;
4112 }
1f1ea6c2 4113 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4114 }
1f1ea6c2
TM		 4115out_ok:
4116 ret = res.acl_len;
e50a1c2e 4117out_free:
bf118a34
AA		 4118 for (i = 0; i < npages; i++)
4119 if (pages[i])
4120 __free_page(pages[i]);
331818f1
TM		 4121 if (res.acl_scratch)
4122 __free_page(res.acl_scratch);
aa1870af
BF		 4123 return ret;
4124}
4125
16b4289c
TM		 4126static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4127{
4128 struct nfs4_exception exception = { };
4129 ssize_t ret;
4130 do {
4131 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4132 if (ret >= 0)
4133 break;
4134 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4135 } while (exception.retry);
4136 return ret;
4137}
4138
e50a1c2e
BF		 4139static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4140{
4141 struct nfs_server *server = NFS_SERVER(inode);
4142 int ret;
4143
4144 if (!nfs4_server_supports_acls(server))
4145 return -EOPNOTSUPP;
4146 ret = nfs_revalidate_inode(server, inode);
4147 if (ret < 0)
4148 return ret;
08a22b39
AK		 4149 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4150 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4151 ret = nfs4_read_cached_acl(inode, buf, buflen);
4152 if (ret != -ENOENT)
bf118a34
AA		 4153 /* -ENOENT is returned if there is no ACL or if there is an ACL
4154 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4155 return ret;
4156 return nfs4_get_acl_uncached(inode, buf, buflen);
4157}
4158
16b4289c 4159static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4160{
4161 struct nfs_server *server = NFS_SERVER(inode);
4162 struct page *pages[NFS4ACL_MAXPAGES];
4163 struct nfs_setaclargs arg = {
4164 .fh = NFS_FH(inode),
4165 .acl_pages = pages,
4166 .acl_len = buflen,
4167 };
73c403a9 4168 struct nfs_setaclres res;
4b580ee3
BF		 4169 struct rpc_message msg = {
4170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4171 .rpc_argp = &arg,
73c403a9 4172 .rpc_resp = &res,
4b580ee3 4173 };
21f498c2 4174 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4175 int ret, i;
4b580ee3
BF		 4176
4177 if (!nfs4_server_supports_acls(server))
4178 return -EOPNOTSUPP;
21f498c2
TM		 4179 if (npages > ARRAY_SIZE(pages))
4180 return -ERANGE;
e9e3d724
NH		 4181 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4182 if (i < 0)
4183 return i;
57ec14c5 4184 nfs4_inode_return_delegation(inode);
7c513058 4185 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4186
4187 /*
4188 * Free each page after tx, so the only ref left is
4189 * held by the network stack
4190 */
4191 for (; i > 0; i--)
4192 put_page(pages[i-1]);
4193
08a22b39
AK		 4194 /*
4195 * Acl update can result in inode attribute update.
4196 * so mark the attribute cache invalid.
4197 */
4198 spin_lock(&inode->i_lock);
4199 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4200 spin_unlock(&inode->i_lock);
f41f7418
TM		 4201 nfs_access_zap_cache(inode);
4202 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4203 return ret;
4204}
4205
16b4289c
TM		 4206static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4207{
4208 struct nfs4_exception exception = { };
4209 int err;
4210 do {
4211 err = nfs4_handle_exception(NFS_SERVER(inode),
4212 __nfs4_proc_set_acl(inode, buf, buflen),
4213 &exception);
4214 } while (exception.retry);
4215 return err;
4216}
4217
1da177e4 4218static int
aa5190d0 4219nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4220{
aa5190d0
TM		 4221 struct nfs_client *clp = server->nfs_client;
4222
4223 if (task->tk_status >= 0)
1da177e4
LT		 4224 return 0;
4225 switch(task->tk_status) {
a1d0b5ee 4226 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4227 case -NFS4ERR_ADMIN_REVOKED:
4228 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4229 if (state == NULL)
4230 break;
4231 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4232 case -NFS4ERR_OPENMODE:
4233 if (state == NULL)
4234 break;
5d422301
TM		 4235 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4236 goto stateid_invalid;
0400a6b0 4237 goto wait_on_recovery;
0ced63d1 4238 case -NFS4ERR_EXPIRED:
5d422301
TM		 4239 if (state != NULL) {
4240 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4241 goto stateid_invalid;
4242 }
1da177e4 4243 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4244 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4245 nfs4_schedule_lease_recovery(clp);
4246 goto wait_on_recovery;
4745e315
AA		 4247#if defined(CONFIG_NFS_V4_1)
4248 case -NFS4ERR_BADSESSION:
4249 case -NFS4ERR_BADSLOT:
4250 case -NFS4ERR_BAD_HIGH_SLOT:
4251 case -NFS4ERR_DEADSESSION:
4252 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4253 case -NFS4ERR_SEQ_FALSE_RETRY:
4254 case -NFS4ERR_SEQ_MISORDERED:
4255 dprintk("%s ERROR %d, Reset session\n", __func__,
4256 task->tk_status);
9f594791 4257 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4258 task->tk_status = 0;
4259 return -EAGAIN;
4260#endif /* CONFIG_NFS_V4_1 */
1da177e4 4261 case -NFS4ERR_DELAY:
aa5190d0 4262 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4263 case -NFS4ERR_GRACE:
1da177e4
LT		 4264 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4265 task->tk_status = 0;
4266 return -EAGAIN;
a8a4ae3a 4267 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4268 case -NFS4ERR_OLD_STATEID:
4269 task->tk_status = 0;
4270 return -EAGAIN;
4271 }
4272 task->tk_status = nfs4_map_errors(task->tk_status);
4273 return 0;
5d422301
TM		 4274stateid_invalid:
4275 task->tk_status = -EIO;
4276 return 0;
0400a6b0 4277wait_on_recovery:
a2c0b9e2 4278 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4279 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4280 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4281 task->tk_status = 0;
4282 return -EAGAIN;
1da177e4
LT		 4283}
4284
f092075d
CL		 4285static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4286 nfs4_verifier *bootverf)
cd93710e
CL		 4287{
4288 __be32 verf[2];
4289
2c820d9a
CL		 4290 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4291 /* An impossible timestamp guarantees this value
4292 * will never match a generated boot time. */
4293 verf[0] = 0;
4294 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4295 } else {
f092075d
CL		 4296 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4297 verf[0] = (__be32)nn->boot_time.tv_sec;
4298 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4299 }
cd93710e
CL		 4300 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4301}
4302
e984a55a
CL		 4303static unsigned int
4304nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4305 char *buf, size_t len)
4306{
4307 unsigned int result;
4308
4309 rcu_read_lock();
4310 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4311 clp->cl_ipaddr,
4312 rpc_peeraddr2str(clp->cl_rpcclient,
4313 RPC_DISPLAY_ADDR),
4314 rpc_peeraddr2str(clp->cl_rpcclient,
4315 RPC_DISPLAY_PROTO));
4316 rcu_read_unlock();
4317 return result;
4318}
4319
4320static unsigned int
4321nfs4_init_uniform_client_string(const struct nfs_client *clp,
4322 char *buf, size_t len)
4323{
6f2ea7f2
CL		 4324 char *nodename = clp->cl_rpcclient->cl_nodename;
4325
4326 if (nfs4_client_id_uniquifier[0] != '\0')
4327 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4328 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4329 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4330 nodename);
e984a55a
CL		 4331}
4332
6bbb4ae8
CL		 4333/**
4334 * nfs4_proc_setclientid - Negotiate client ID
4335 * @clp: state data structure
4336 * @program: RPC program for NFSv4 callback service
4337 * @port: IP port number for NFS4 callback service
4338 * @cred: RPC credential to use for this call
4339 * @res: where to place the result
4340 *
4341 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4342 */
bb8b27e5
TM		 4343int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4344 unsigned short port, struct rpc_cred *cred,
4345 struct nfs4_setclientid_res *res)
1da177e4
LT		 4346{
4347 nfs4_verifier sc_verifier;
4348 struct nfs4_setclientid setclientid = {
4349 .sc_verifier = &sc_verifier,
4350 .sc_prog = program,
f4eecd5d 4351 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4352 };
4353 struct rpc_message msg = {
4354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4355 .rpc_argp = &setclientid,
bb8b27e5 4356 .rpc_resp = res,
286d7d6a 4357 .rpc_cred = cred,
1da177e4 4358 };
6bbb4ae8 4359 int status;
1da177e4 4360
de734831 4361 /* nfs_client_id4 */
f092075d 4362 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4363 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4364 setclientid.sc_name_len =
4365 nfs4_init_uniform_client_string(clp,
4366 setclientid.sc_name,
4367 sizeof(setclientid.sc_name));
4368 else
4369 setclientid.sc_name_len =
4370 nfs4_init_nonuniform_client_string(clp,
4371 setclientid.sc_name,
4372 sizeof(setclientid.sc_name));
de734831 4373 /* cb_client4 */
e984a55a 4374 rcu_read_lock();
de734831 4375 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4376 sizeof(setclientid.sc_netid),
4377 rpc_peeraddr2str(clp->cl_rpcclient,
4378 RPC_DISPLAY_NETID));
de734831
CL		 4379 rcu_read_unlock();
4380 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4381 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4382 clp->cl_ipaddr, port >> 8, port & 255);
4383
6bbb4ae8
CL		 4384 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4385 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4386 setclientid.sc_name_len, setclientid.sc_name);
4387 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4388 dprintk("NFS reply setclientid: %d\n", status);
4389 return status;
1da177e4
LT		 4390}
4391
6bbb4ae8
CL		 4392/**
4393 * nfs4_proc_setclientid_confirm - Confirm client ID
4394 * @clp: state data structure
4395 * @res: result of a previous SETCLIENTID
4396 * @cred: RPC credential to use for this call
4397 *
4398 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4399 */
fd954ae1 4400int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4401 struct nfs4_setclientid_res *arg,
4402 struct rpc_cred *cred)
1da177e4 4403{
1da177e4
LT		 4404 struct rpc_message msg = {
4405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4406 .rpc_argp = arg,
286d7d6a 4407 .rpc_cred = cred,
1da177e4 4408 };
1da177e4
LT		 4409 int status;
4410
6bbb4ae8
CL		 4411 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4412 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4413 clp->cl_clientid);
1bd714f2 4414 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4415 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4416 return status;
4417}
4418
fe650407
TM		 4419struct nfs4_delegreturndata {
4420 struct nfs4_delegreturnargs args;
fa178f29 4421 struct nfs4_delegreturnres res;
fe650407
TM		 4422 struct nfs_fh fh;
4423 nfs4_stateid stateid;
26e976a8 4424 unsigned long timestamp;
fa178f29 4425 struct nfs_fattr fattr;
fe650407
TM		 4426 int rpc_status;
4427};
4428
fe650407
TM		 4429static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4430{
4431 struct nfs4_delegreturndata *data = calldata;
938e1010 4432
14516c3a
TM		 4433 if (!nfs4_sequence_done(task, &data->res.seq_res))
4434 return;
938e1010 4435
79708861
RL		 4436 switch (task->tk_status) {
4437 case -NFS4ERR_STALE_STATEID:
4438 case -NFS4ERR_EXPIRED:
4439 case 0:
fa178f29 4440 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4441 break;
4442 default:
4443 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4444 -EAGAIN) {
d00c5d43 4445 rpc_restart_call_prepare(task);
79708861
RL		 4446 return;
4447 }
4448 }
4449 data->rpc_status = task->tk_status;
fe650407
TM		 4450}
4451
4452static void nfs4_delegreturn_release(void *calldata)
4453{
fe650407
TM		 4454 kfree(calldata);
4455}
4456
938e1010
AA		 4457#if defined(CONFIG_NFS_V4_1)
4458static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4459{
4460 struct nfs4_delegreturndata *d_data;
4461
4462 d_data = (struct nfs4_delegreturndata *)data;
4463
d9afbd1b
TM		 4464 nfs4_setup_sequence(d_data->res.server,
4465 &d_data->args.seq_args,
4466 &d_data->res.seq_res,
4467 task);
938e1010
AA		 4468}
4469#endif /* CONFIG_NFS_V4_1 */
4470
c8d149f3 4471static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4472#if defined(CONFIG_NFS_V4_1)
4473 .rpc_call_prepare = nfs4_delegreturn_prepare,
4474#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4475 .rpc_call_done = nfs4_delegreturn_done,
4476 .rpc_release = nfs4_delegreturn_release,
4477};
4478
e6f81075 4479static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4480{
4481 struct nfs4_delegreturndata *data;
fa178f29 4482 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4483 struct rpc_task *task;
5138fde0
TM		 4484 struct rpc_message msg = {
4485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4486 .rpc_cred = cred,
4487 };
c970aa85
TM		 4488 struct rpc_task_setup task_setup_data = {
4489 .rpc_client = server->client,
5138fde0 4490 .rpc_message = &msg,
c970aa85
TM		 4491 .callback_ops = &nfs4_delegreturn_ops,
4492 .flags = RPC_TASK_ASYNC,
4493 };
e6f81075 4494 int status = 0;
fe650407 4495
8535b2be 4496 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4497 if (data == NULL)
4498 return -ENOMEM;
9d12b216 4499 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4500 data->args.fhandle = &data->fh;
4501 data->args.stateid = &data->stateid;
9e907fec 4502 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4503 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4504 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4505 data->res.fattr = &data->fattr;
4506 data->res.server = server;
5138fde0 4507 nfs_fattr_init(data->res.fattr);
26e976a8 4508 data->timestamp = jiffies;
fe650407
TM		 4509 data->rpc_status = 0;
4510
c970aa85 4511 task_setup_data.callback_data = data;
1174dd1f
TM		 4512 msg.rpc_argp = &data->args;
4513 msg.rpc_resp = &data->res;
c970aa85 4514 task = rpc_run_task(&task_setup_data);
7a1218a2 4515 if (IS_ERR(task))
fe650407 4516 return PTR_ERR(task);
e6f81075
TM		 4517 if (!issync)
4518 goto out;
fe650407 4519 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4520 if (status != 0)
4521 goto out;
4522 status = data->rpc_status;
e144cbcc
TM		 4523 if (status == 0)
4524 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4525 else
4526 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4527out:
e6b3c4db 4528 rpc_put_task(task);
fe650407 4529 return status;
1da177e4
LT		 4530}
4531
e6f81075 4532int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4533{
4534 struct nfs_server *server = NFS_SERVER(inode);
4535 struct nfs4_exception exception = { };
4536 int err;
4537 do {
e6f81075 4538 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4539 switch (err) {
4540 case -NFS4ERR_STALE_STATEID:
4541 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4542 case 0:
4543 return 0;
4544 }
4545 err = nfs4_handle_exception(server, err, &exception);
4546 } while (exception.retry);
4547 return err;
4548}
4549
4550#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4551#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4552
4553/*
4554 * sleep, with exponential backoff, and retry the LOCK operation.
4555 */
4556static unsigned long
4557nfs4_set_lock_task_retry(unsigned long timeout)
4558{
d310310c 4559 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4560 timeout <<= 1;
4561 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4562 return NFS4_LOCK_MAXTIMEOUT;
4563 return timeout;
4564}
4565
1da177e4
LT		 4566static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4567{
4568 struct inode *inode = state->inode;
4569 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4570 struct nfs_client *clp = server->nfs_client;
911d1aaf 4571 struct nfs_lockt_args arg = {
1da177e4 4572 .fh = NFS_FH(inode),
911d1aaf 4573 .fl = request,
1da177e4 4574 };
911d1aaf
TM		 4575 struct nfs_lockt_res res = {
4576 .denied = request,
1da177e4
LT		 4577 };
4578 struct rpc_message msg = {
4579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4580 .rpc_argp = &arg,
4581 .rpc_resp = &res,
4582 .rpc_cred = state->owner->so_cred,
4583 };
1da177e4
LT		 4584 struct nfs4_lock_state *lsp;
4585 int status;
4586
911d1aaf 4587 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4588 status = nfs4_set_lock_state(state, request);
4589 if (status != 0)
4590 goto out;
4591 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4592 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4593 arg.lock_owner.s_dev = server->s_dev;
7c513058 4594 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4595 switch (status) {
4596 case 0:
4597 request->fl_type = F_UNLCK;
4598 break;
4599 case -NFS4ERR_DENIED:
4600 status = 0;
1da177e4 4601 }
70cc6487 4602 request->fl_ops->fl_release_private(request);
8d0a8a9d 4603out:
1da177e4
LT		 4604 return status;
4605}
4606
4607static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4608{
4609 struct nfs4_exception exception = { };
4610 int err;
4611
4612 do {
4613 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4614 _nfs4_proc_getlk(state, cmd, request),
4615 &exception);
4616 } while (exception.retry);
4617 return err;
4618}
4619
4620static int do_vfs_lock(struct file *file, struct file_lock *fl)
4621{
4622 int res = 0;
4623 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4624 case FL_POSIX:
4625 res = posix_lock_file_wait(file, fl);
4626 break;
4627 case FL_FLOCK:
4628 res = flock_lock_file_wait(file, fl);
4629 break;
4630 default:
4631 BUG();
4632 }
1da177e4
LT		 4633 return res;
4634}
4635
faf5f49c 4636struct nfs4_unlockdata {
911d1aaf
TM		 4637 struct nfs_locku_args arg;
4638 struct nfs_locku_res res;
faf5f49c
TM		 4639 struct nfs4_lock_state *lsp;
4640 struct nfs_open_context *ctx;
911d1aaf
TM		 4641 struct file_lock fl;
4642 const struct nfs_server *server;
26e976a8 4643 unsigned long timestamp;
faf5f49c
TM		 4644};
4645
911d1aaf
TM		 4646static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4647 struct nfs_open_context *ctx,
4648 struct nfs4_lock_state *lsp,
4649 struct nfs_seqid *seqid)
4650{
4651 struct nfs4_unlockdata *p;
4652 struct inode *inode = lsp->ls_state->inode;
4653
8535b2be 4654 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4655 if (p == NULL)
4656 return NULL;
4657 p->arg.fh = NFS_FH(inode);
4658 p->arg.fl = &p->fl;
4659 p->arg.seqid = seqid;
c1d51931 4660 p->res.seqid = seqid;
911d1aaf
TM		 4661 p->arg.stateid = &lsp->ls_stateid;
4662 p->lsp = lsp;
4663 atomic_inc(&lsp->ls_count);
4664 /* Ensure we don't close file until we're done freeing locks! */
4665 p->ctx = get_nfs_open_context(ctx);
4666 memcpy(&p->fl, fl, sizeof(p->fl));
4667 p->server = NFS_SERVER(inode);
4668 return p;
4669}
4670
06f814a3 4671static void nfs4_locku_release_calldata(void *data)
faf5f49c 4672{
963d8fe5 4673 struct nfs4_unlockdata *calldata = data;
911d1aaf 4674 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4675 nfs4_put_lock_state(calldata->lsp);
4676 put_nfs_open_context(calldata->ctx);
4677 kfree(calldata);
faf5f49c
TM		 4678}
4679
963d8fe5 4680static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4681{
963d8fe5 4682 struct nfs4_unlockdata *calldata = data;
faf5f49c 4683
14516c3a
TM		 4684 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4685 return;
faf5f49c
TM		 4686 switch (task->tk_status) {
4687 case 0:
f597c537
TM		 4688 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4689 &calldata->res.stateid);
26e976a8 4690 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4691 break;
9e33bed5
TM		 4692 case -NFS4ERR_BAD_STATEID:
4693 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4694 case -NFS4ERR_STALE_STATEID:
4695 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4696 break;
4697 default:
9e33bed5 4698 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4699 rpc_restart_call_prepare(task);
faf5f49c 4700 }
2b1bc308 4701 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4702}
4703
4ce70ada 4704static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4705{
4ce70ada 4706 struct nfs4_unlockdata *calldata = data;
faf5f49c 4707
911d1aaf 4708 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4709 goto out_wait;
795a88c9 4710 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4711 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4712 goto out_no_action;
faf5f49c 4713 }
26e976a8 4714 calldata->timestamp = jiffies;
035168ab 4715 if (nfs4_setup_sequence(calldata->server,
a893693c 4716 &calldata->arg.seq_args,
2240a9e2
TM		 4717 &calldata->res.seq_res,
4718 task) != 0)
4719 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4720 return;
4721out_no_action:
4722 task->tk_action = NULL;
4723out_wait:
4724 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4725}
4726
963d8fe5 4727static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4728 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4729 .rpc_call_done = nfs4_locku_done,
06f814a3 4730 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4731};
4732
a5d16a4d
TM		 4733static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4734 struct nfs_open_context *ctx,
4735 struct nfs4_lock_state *lsp,
4736 struct nfs_seqid *seqid)
4737{
4738 struct nfs4_unlockdata *data;
5138fde0
TM		 4739 struct rpc_message msg = {
4740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4741 .rpc_cred = ctx->cred,
4742 };
c970aa85
TM		 4743 struct rpc_task_setup task_setup_data = {
4744 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4745 .rpc_message = &msg,
c970aa85 4746 .callback_ops = &nfs4_locku_ops,
101070ca 4747 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4748 .flags = RPC_TASK_ASYNC,
4749 };
a5d16a4d 4750
137d6aca
FF		 4751 /* Ensure this is an unlock - when canceling a lock, the
4752 * canceled lock is passed in, and it won't be an unlock.
4753 */
4754 fl->fl_type = F_UNLCK;
4755
a5d16a4d
TM		 4756 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4757 if (data == NULL) {
4758 nfs_free_seqid(seqid);
4759 return ERR_PTR(-ENOMEM);
4760 }
4761
9d12b216 4762 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4763 msg.rpc_argp = &data->arg;
4764 msg.rpc_resp = &data->res;
c970aa85
TM		 4765 task_setup_data.callback_data = data;
4766 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4767}
4768
faf5f49c
TM		 4769static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4770{
65b62a29
TM		 4771 struct inode *inode = state->inode;
4772 struct nfs4_state_owner *sp = state->owner;
4773 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4774 struct nfs_seqid *seqid;
1da177e4 4775 struct nfs4_lock_state *lsp;
06f814a3
TM		 4776 struct rpc_task *task;
4777 int status = 0;
536ff0f8 4778 unsigned char fl_flags = request->fl_flags;
faf5f49c 4779
8d0a8a9d 4780 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4781 /* Unlock _before_ we do the RPC call */
4782 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4783 /* Exclude nfs_delegation_claim_locks() */
4784 mutex_lock(&sp->so_delegreturn_mutex);
4785 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4786 down_read(&nfsi->rwsem);
4787 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4788 up_read(&nfsi->rwsem);
65b62a29 4789 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4790 goto out;
19e03c57
TM		 4791 }
4792 up_read(&nfsi->rwsem);
65b62a29 4793 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4794 if (status != 0)
9b073574
TM		 4795 goto out;
4796 /* Is this a delegated lock? */
8d0a8a9d 4797 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 4798 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
4799 goto out;
8535b2be 4800 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4801 status = -ENOMEM;
911d1aaf 4802 if (seqid == NULL)
9b073574 4803 goto out;
cd3758e3 4804 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4805 status = PTR_ERR(task);
4806 if (IS_ERR(task))
9b073574 4807 goto out;
a5d16a4d 4808 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4809 rpc_put_task(task);
9b073574 4810out:
536ff0f8 4811 request->fl_flags = fl_flags;
1da177e4
LT		 4812 return status;
4813}
4814
a5d16a4d
TM		 4815struct nfs4_lockdata {
4816 struct nfs_lock_args arg;
4817 struct nfs_lock_res res;
4818 struct nfs4_lock_state *lsp;
4819 struct nfs_open_context *ctx;
4820 struct file_lock fl;
26e976a8 4821 unsigned long timestamp;
a5d16a4d
TM		 4822 int rpc_status;
4823 int cancelled;
66179efe 4824 struct nfs_server *server;
a5d16a4d
TM		 4825};
4826
4827static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4828 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4829 gfp_t gfp_mask)
1da177e4 4830{
a5d16a4d
TM		 4831 struct nfs4_lockdata *p;
4832 struct inode *inode = lsp->ls_state->inode;
1da177e4 4833 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4834
8535b2be 4835 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4836 if (p == NULL)
4837 return NULL;
4838
4839 p->arg.fh = NFS_FH(inode);
4840 p->arg.fl = &p->fl;
8535b2be 4841 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4842 if (p->arg.open_seqid == NULL)
4843 goto out_free;
8535b2be 4844 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4845 if (p->arg.lock_seqid == NULL)
2f74c0a0 4846 goto out_free_seqid;
a5d16a4d 4847 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4848 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4849 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4850 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4851 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4852 p->lsp = lsp;
66179efe 4853 p->server = server;
a5d16a4d
TM		 4854 atomic_inc(&lsp->ls_count);
4855 p->ctx = get_nfs_open_context(ctx);
4856 memcpy(&p->fl, fl, sizeof(p->fl));
4857 return p;
2f74c0a0
TM		 4858out_free_seqid:
4859 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4860out_free:
4861 kfree(p);
4862 return NULL;
4863}
4864
4865static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4866{
4867 struct nfs4_lockdata *data = calldata;
4868 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4869
3110ff80 4870 dprintk("%s: begin!\n", __func__);
2f74c0a0 4871 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4872 goto out_wait;
a5d16a4d
TM		 4873 /* Do we need to do an open_to_lock_owner? */
4874 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4875 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4876 goto out_release_lock_seqid;
8fe72bac 4877 }
8e472f33 4878 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4879 data->arg.new_lock_owner = 1;
c1d51931 4880 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4881 } else
4882 data->arg.new_lock_owner = 0;
5d422301
TM		 4883 if (!nfs4_valid_open_stateid(state)) {
4884 data->rpc_status = -EBADF;
4885 task->tk_action = NULL;
4886 goto out_release_open_seqid;
4887 }
26e976a8 4888 data->timestamp = jiffies;
035168ab
TM		 4889 if (nfs4_setup_sequence(data->server,
4890 &data->arg.seq_args,
2240a9e2 4891 &data->res.seq_res,
d9afbd1b 4892 task) == 0)
66179efe 4893 return;
5d422301 4894out_release_open_seqid:
2240a9e2
TM		 4895 nfs_release_seqid(data->arg.open_seqid);
4896out_release_lock_seqid:
4897 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4898out_wait:
4899 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4900 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4901}
4902
a5d16a4d
TM		 4903static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4904{
4905 struct nfs4_lockdata *data = calldata;
4906
3110ff80 4907 dprintk("%s: begin!\n", __func__);
a5d16a4d 4908
14516c3a
TM		 4909 if (!nfs4_sequence_done(task, &data->res.seq_res))
4910 return;
66179efe 4911
a5d16a4d 4912 data->rpc_status = task->tk_status;
a5d16a4d 4913 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4914 if (data->rpc_status == 0)
4915 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4916 else
4917 goto out;
4918 }
4919 if (data->rpc_status == 0) {
f597c537 4920 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4921 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4922 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4923 }
a5d16a4d 4924out:
3110ff80 4925 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4926}
4927
4928static void nfs4_lock_release(void *calldata)
4929{
4930 struct nfs4_lockdata *data = calldata;
4931
3110ff80 4932 dprintk("%s: begin!\n", __func__);
2f74c0a0 4933 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4934 if (data->cancelled != 0) {
4935 struct rpc_task *task;
4936 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4937 data->arg.lock_seqid);
4938 if (!IS_ERR(task))
bf294b41 4939 rpc_put_task_async(task);
3110ff80 4940 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4941 } else
4942 nfs_free_seqid(data->arg.lock_seqid);
4943 nfs4_put_lock_state(data->lsp);
4944 put_nfs_open_context(data->ctx);
4945 kfree(data);
3110ff80 4946 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4947}
4948
4949static const struct rpc_call_ops nfs4_lock_ops = {
4950 .rpc_call_prepare = nfs4_lock_prepare,
4951 .rpc_call_done = nfs4_lock_done,
4952 .rpc_release = nfs4_lock_release,
4953};
4954
2bee72a6
TM		 4955static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4956{
2bee72a6
TM		 4957 switch (error) {
4958 case -NFS4ERR_ADMIN_REVOKED:
4959 case -NFS4ERR_BAD_STATEID:
ecac799a 4960 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4961 if (new_lock_owner != 0 ||
795a88c9 4962 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4963 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4964 break;
4965 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4966 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4967 case -NFS4ERR_EXPIRED:
4968 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4969 };
4970}
4971
afe6c27c 4972static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4973{
4974 struct nfs4_lockdata *data;
4975 struct rpc_task *task;
5138fde0
TM		 4976 struct rpc_message msg = {
4977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4978 .rpc_cred = state->owner->so_cred,
4979 };
c970aa85
TM		 4980 struct rpc_task_setup task_setup_data = {
4981 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4982 .rpc_message = &msg,
c970aa85 4983 .callback_ops = &nfs4_lock_ops,
101070ca 4984 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4985 .flags = RPC_TASK_ASYNC,
4986 };
a5d16a4d
TM		 4987 int ret;
4988
3110ff80 4989 dprintk("%s: begin!\n", __func__);
cd3758e3 4990 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4991 fl->fl_u.nfs4_fl.owner,
4992 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4993 if (data == NULL)
4994 return -ENOMEM;
4995 if (IS_SETLKW(cmd))
4996 data->arg.block = 1;
9d12b216 4997 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4998 msg.rpc_argp = &data->arg;
4999 msg.rpc_resp = &data->res;
c970aa85 5000 task_setup_data.callback_data = data;
8fe72bac
TM		 5001 if (recovery_type > NFS_LOCK_NEW) {
5002 if (recovery_type == NFS_LOCK_RECLAIM)
5003 data->arg.reclaim = NFS_LOCK_RECLAIM;
5004 nfs4_set_sequence_privileged(&data->arg.seq_args);
5005 }
c970aa85 5006 task = rpc_run_task(&task_setup_data);
7a1218a2 5007 if (IS_ERR(task))
a5d16a4d 5008 return PTR_ERR(task);
a5d16a4d
TM		 5009 ret = nfs4_wait_for_completion_rpc_task(task);
5010 if (ret == 0) {
5011 ret = data->rpc_status;
2bee72a6
TM		 5012 if (ret)
5013 nfs4_handle_setlk_error(data->server, data->lsp,
5014 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5015 } else
5016 data->cancelled = 1;
e6b3c4db 5017 rpc_put_task(task);
3110ff80 5018 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5019 return ret;
1da177e4
LT		 5020}
5021
5022static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5023{
202b50dc 5024 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5025 struct nfs4_exception exception = {
5026 .inode = state->inode,
5027 };
202b50dc
TM		 5028 int err;
5029
5030 do {
42a2d13e
TM		 5031 /* Cache the lock if possible... */
5032 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5033 return 0;
afe6c27c 5034 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5035 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5036 break;
5037 nfs4_handle_exception(server, err, &exception);
5038 } while (exception.retry);
5039 return err;
1da177e4
LT		 5040}
5041
5042static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5043{
202b50dc 5044 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5045 struct nfs4_exception exception = {
5046 .inode = state->inode,
5047 };
202b50dc
TM		 5048 int err;
5049
6bfc93ef
TM		 5050 err = nfs4_set_lock_state(state, request);
5051 if (err != 0)
5052 return err;
202b50dc 5053 do {
42a2d13e
TM		 5054 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5055 return 0;
afe6c27c 5056 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5057 switch (err) {
5058 default:
5059 goto out;
5060 case -NFS4ERR_GRACE:
5061 case -NFS4ERR_DELAY:
5062 nfs4_handle_exception(server, err, &exception);
5063 err = 0;
5064 }
202b50dc 5065 } while (exception.retry);
a9ed2e25 5066out:
202b50dc 5067 return err;
1da177e4
LT		 5068}
5069
f062eb6c 5070#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5071/**
5072 * nfs41_check_expired_locks - possibly free a lock stateid
5073 *
5074 * @state: NFSv4 state for an inode
5075 *
5076 * Returns NFS_OK if recovery for this stateid is now finished.
5077 * Otherwise a negative NFS4ERR value is returned.
5078 */
b01dd1d8 5079static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5080{
eb64cf96 5081 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5082 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5083 struct nfs_server *server = NFS_SERVER(state->inode);
5084
b01dd1d8 5085 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5086 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 5087 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5088 if (status != NFS_OK) {
3e60ffdd
CL		 5089 /* Free the stateid unless the server
5090 * informs us the stateid is unrecognized. */
89af2739
CL		 5091 if (status != -NFS4ERR_BAD_STATEID)
5092 nfs41_free_stateid(server,
5093 &lsp->ls_stateid);
795a88c9 5094 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5095 ret = status;
5096 }
5097 }
5098 };
5099
5100 return ret;
5101}
5102
5103static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5104{
5105 int status = NFS_OK;
5106
5107 if (test_bit(LK_STATE_IN_USE, &state->flags))
5108 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5109 if (status != NFS_OK)
5110 status = nfs4_lock_expired(state, request);
5111 return status;
f062eb6c
BS		 5112}
5113#endif
5114
1da177e4
LT		 5115static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5116{
9a99af49 5117 struct nfs4_state_owner *sp = state->owner;
19e03c57 5118 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5119 unsigned char fl_flags = request->fl_flags;
9a99af49 5120 unsigned int seq;
8e469ebd 5121 int status = -ENOLCK;
1da177e4 5122
8e469ebd
TM		 5123 if ((fl_flags & FL_POSIX) &&
5124 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5125 goto out;
6bfc93ef 5126 /* Is this a delegated open? */
6bfc93ef
TM		 5127 status = nfs4_set_lock_state(state, request);
5128 if (status != 0)
5129 goto out;
01c3b861
TM		 5130 request->fl_flags |= FL_ACCESS;
5131 status = do_vfs_lock(request->fl_file, request);
5132 if (status < 0)
5133 goto out;
19e03c57 5134 down_read(&nfsi->rwsem);
01c3b861 5135 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5136 /* Yes: cache locks! */
01c3b861 5137 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5138 request->fl_flags = fl_flags & ~FL_SLEEP;
5139 status = do_vfs_lock(request->fl_file, request);
5140 goto out_unlock;
01c3b861 5141 }
9a99af49
TM		 5142 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5143 up_read(&nfsi->rwsem);
afe6c27c 5144 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5145 if (status != 0)
9a99af49
TM		 5146 goto out;
5147 down_read(&nfsi->rwsem);
5148 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5149 status = -NFS4ERR_DELAY;
01c3b861 5150 goto out_unlock;
9a99af49 5151 }
6bfc93ef 5152 /* Note: we always want to sleep here! */
01c3b861 5153 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5154 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5155 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5156 "manager!\n", __func__);
01c3b861 5157out_unlock:
19e03c57 5158 up_read(&nfsi->rwsem);
01c3b861
TM		 5159out:
5160 request->fl_flags = fl_flags;
1da177e4
LT		 5161 return status;
5162}
5163
5164static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5165{
a1d0b5ee
TM		 5166 struct nfs4_exception exception = {
5167 .state = state,
05ffe24f 5168 .inode = state->inode,
a1d0b5ee 5169 };
1da177e4
LT		 5170 int err;
5171
5172 do {
965b5d67
TM		 5173 err = _nfs4_proc_setlk(state, cmd, request);
5174 if (err == -NFS4ERR_DENIED)
5175 err = -EAGAIN;
1da177e4 5176 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5177 err, &exception);
1da177e4
LT		 5178 } while (exception.retry);
5179 return err;
5180}
5181
5182static int
5183nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5184{
5185 struct nfs_open_context *ctx;
5186 struct nfs4_state *state;
5187 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5188 int status;
5189
5190 /* verify open state */
cd3758e3 5191 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5192 state = ctx->state;
5193
5194 if (request->fl_start < 0 || request->fl_end < 0)
5195 return -EINVAL;
5196
d953126a
TM		 5197 if (IS_GETLK(cmd)) {
5198 if (state != NULL)
5199 return nfs4_proc_getlk(state, F_GETLK, request);
5200 return 0;
5201 }
1da177e4
LT		 5202
5203 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5204 return -EINVAL;
5205
d953126a
TM		 5206 if (request->fl_type == F_UNLCK) {
5207 if (state != NULL)
5208 return nfs4_proc_unlck(state, cmd, request);
5209 return 0;
5210 }
1da177e4 5211
d953126a
TM		 5212 if (state == NULL)
5213 return -ENOLCK;
55725513
TM		 5214 /*
5215 * Don't rely on the VFS having checked the file open mode,
5216 * since it won't do this for flock() locks.
5217 */
f44106e2 5218 switch (request->fl_type) {
55725513
TM		 5219 case F_RDLCK:
5220 if (!(filp->f_mode & FMODE_READ))
5221 return -EBADF;
5222 break;
5223 case F_WRLCK:
5224 if (!(filp->f_mode & FMODE_WRITE))
5225 return -EBADF;
5226 }
5227
1da177e4
LT		 5228 do {
5229 status = nfs4_proc_setlk(state, cmd, request);
5230 if ((status != -EAGAIN) || IS_SETLK(cmd))
5231 break;
5232 timeout = nfs4_set_lock_task_retry(timeout);
5233 status = -ERESTARTSYS;
5234 if (signalled())
5235 break;
5236 } while(status < 0);
1da177e4
LT		 5237 return status;
5238}
5239
db4f2e63 5240int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5241{
5242 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5243 int err;
5244
5245 err = nfs4_set_lock_state(state, fl);
5246 if (err != 0)
db4f2e63 5247 return err;
4a706fa0 5248 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5249 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5250}
6b3b5496 5251
cf470c3e
TM		 5252struct nfs_release_lockowner_data {
5253 struct nfs4_lock_state *lsp;
5ae67c4f 5254 struct nfs_server *server;
cf470c3e
TM		 5255 struct nfs_release_lockowner_args args;
5256};
5257
d3c7b7cc
TM		 5258static void nfs4_release_lockowner_release(void *calldata)
5259{
cf470c3e 5260 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5261 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5262 kfree(calldata);
5263}
5264
17280175 5265static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5266 .rpc_release = nfs4_release_lockowner_release,
5267};
5268
c8b2d0bf 5269static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5270{
cf470c3e 5271 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5272 struct rpc_message msg = {
5273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5274 };
5275
5276 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5277 return -EINVAL;
5278 data = kmalloc(sizeof(*data), GFP_NOFS);
5279 if (!data)
5280 return -ENOMEM;
5281 data->lsp = lsp;
5ae67c4f 5282 data->server = server;
cf470c3e
TM		 5283 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5284 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5285 data->args.lock_owner.s_dev = server->s_dev;
5286 msg.rpc_argp = &data->args;
5287 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5288 return 0;
d3c7b7cc
TM		 5289}
5290
aa1870af
BF		 5291#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5292
64c2ce8b
AK		 5293static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5294 const void *buf, size_t buflen,
5295 int flags, int type)
6b3b5496 5296{
64c2ce8b
AK		 5297 if (strcmp(key, "") != 0)
5298 return -EINVAL;
4b580ee3 5299
64c2ce8b 5300 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5301}
5302
64c2ce8b
AK		 5303static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5304 void *buf, size_t buflen, int type)
6b3b5496 5305{
64c2ce8b
AK		 5306 if (strcmp(key, "") != 0)
5307 return -EINVAL;
aa1870af 5308
64c2ce8b 5309 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5310}
5311
64c2ce8b
AK		 5312static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5313 size_t list_len, const char *name,
5314 size_t name_len, int type)
6b3b5496 5315{
64c2ce8b 5316 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5317
096455a2
BF		 5318 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5319 return 0;
64c2ce8b
AK		 5320
5321 if (list && len <= list_len)
5322 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5323 return len;
6b3b5496
BF		 5324}
5325
533eb461
AA		 5326/*
5327 * nfs_fhget will use either the mounted_on_fileid or the fileid
5328 */
69aaaae1
TM		 5329static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5330{
533eb461
AA		 5331 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5332 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5333 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5334 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5335 return;
5336
5337 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5338 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5339 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5340 fattr->nlink = 2;
5341}
5342
f05d147f
BS		 5343static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5344 const struct qstr *name,
5345 struct nfs4_fs_locations *fs_locations,
5346 struct page *page)
683b57b4
TM		 5347{
5348 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5349 u32 bitmask[3] = {
361e624f 5350 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5351 };
5352 struct nfs4_fs_locations_arg args = {
5353 .dir_fh = NFS_FH(dir),
c228fd3a 5354 .name = name,
683b57b4
TM		 5355 .page = page,
5356 .bitmask = bitmask,
5357 };
22958463
BH		 5358 struct nfs4_fs_locations_res res = {
5359 .fs_locations = fs_locations,
5360 };
683b57b4
TM		 5361 struct rpc_message msg = {
5362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5363 .rpc_argp = &args,
22958463 5364 .rpc_resp = &res,
683b57b4
TM		 5365 };
5366 int status;
5367
3110ff80 5368 dprintk("%s: start\n", __func__);
533eb461
AA		 5369
5370 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5371 * is not supported */
5372 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5373 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5374 else
5375 bitmask[0] |= FATTR4_WORD0_FILEID;
5376
c228fd3a 5377 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5378 fs_locations->server = server;
830b8e33 5379 fs_locations->nlocations = 0;
f05d147f 5380 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5381 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5382 return status;
5383}
5384
f05d147f
BS		 5385int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5386 const struct qstr *name,
5387 struct nfs4_fs_locations *fs_locations,
5388 struct page *page)
db0a9593
BS		 5389{
5390 struct nfs4_exception exception = { };
5391 int err;
5392 do {
5393 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5394 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5395 &exception);
5396 } while (exception.retry);
5397 return err;
5398}
5399
5a5ea0d4
BS		 5400static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5401{
5402 int status;
5403 struct nfs4_secinfo_arg args = {
5404 .dir_fh = NFS_FH(dir),
5405 .name = name,
5406 };
5407 struct nfs4_secinfo_res res = {
5408 .flavors = flavors,
5409 };
5410 struct rpc_message msg = {
5411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5412 .rpc_argp = &args,
5413 .rpc_resp = &res,
5414 };
5415
5416 dprintk("NFS call secinfo %s\n", name->name);
5417 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5418 dprintk("NFS reply secinfo: %d\n", status);
5419 return status;
5420}
5421
72de53ec
BS		 5422int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5423 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5424{
5425 struct nfs4_exception exception = { };
5426 int err;
5427 do {
5428 err = nfs4_handle_exception(NFS_SERVER(dir),
5429 _nfs4_proc_secinfo(dir, name, flavors),
5430 &exception);
5431 } while (exception.retry);
5432 return err;
5433}
5434
557134a3 5435#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5436/*
5437 * Check the exchange flags returned by the server for invalid flags, having
5438 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5439 * DS flags set.
5440 */
5441static int nfs4_check_cl_exchange_flags(u32 flags)
5442{
5443 if (flags & ~EXCHGID4_FLAG_MASK_R)
5444 goto out_inval;
5445 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5446 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5447 goto out_inval;
5448 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5449 goto out_inval;
5450 return NFS_OK;
5451out_inval:
5452 return -NFS4ERR_INVAL;
5453}
5454
78fe0f41 5455static bool
79d4e1f0
CL		 5456nfs41_same_server_scope(struct nfs41_server_scope *a,
5457 struct nfs41_server_scope *b)
78fe0f41
WAA		 5458{
5459 if (a->server_scope_sz == b->server_scope_sz &&
5460 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5461 return true;
5462
5463 return false;
5464}
5465
7c44f1ae
WAA		 5466/*
5467 * nfs4_proc_bind_conn_to_session()
5468 *
5469 * The 4.1 client currently uses the same TCP connection for the
5470 * fore and backchannel.
5471 */
2cf047c9 5472int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5473{
5474 int status;
5475 struct nfs41_bind_conn_to_session_res res;
5476 struct rpc_message msg = {
5477 .rpc_proc =
5478 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5479 .rpc_argp = clp,
5480 .rpc_resp = &res,
2cf047c9 5481 .rpc_cred = cred,
7c44f1ae
WAA		 5482 };
5483
5484 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5485
5486 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5487 if (unlikely(res.session == NULL)) {
5488 status = -ENOMEM;
5489 goto out;
5490 }
5491
5492 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5493 if (status == 0) {
5494 if (memcmp(res.session->sess_id.data,
5495 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5496 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5497 status = -EIO;
5498 goto out_session;
5499 }
5500 if (res.dir != NFS4_CDFS4_BOTH) {
5501 dprintk("NFS: %s: Unexpected direction from server\n",
5502 __func__);
5503 status = -EIO;
5504 goto out_session;
5505 }
5506 if (res.use_conn_in_rdma_mode) {
5507 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5508 __func__);
5509 status = -EIO;
5510 goto out_session;
5511 }
5512 }
5513out_session:
5514 kfree(res.session);
5515out:
5516 dprintk("<-- %s status= %d\n", __func__, status);
5517 return status;
5518}
5519
99fe60d0
BH		 5520/*
5521 * nfs4_proc_exchange_id()
5522 *
6bbb4ae8
CL		 5523 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5524 *
99fe60d0
BH		 5525 * Since the clientid has expired, all compounds using sessions
5526 * associated with the stale clientid will be returning
5527 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5528 * be in some phase of session reset.
5529 */
4d643d1d 5530int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5531{
5532 nfs4_verifier verifier;
5533 struct nfs41_exchange_id_args args = {
cd93710e 5534 .verifier = &verifier,
99fe60d0 5535 .client = clp,
357f54d6 5536 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5537 };
5538 struct nfs41_exchange_id_res res = {
32b01310 5539 0
99fe60d0
BH		 5540 };
5541 int status;
5542 struct rpc_message msg = {
5543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5544 .rpc_argp = &args,
5545 .rpc_resp = &res,
5546 .rpc_cred = cred,
5547 };
99fe60d0 5548
f092075d 5549 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5550 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5551 sizeof(args.id));
6bbb4ae8
CL		 5552 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5553 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5554 args.id_len, args.id);
99fe60d0 5555
acdeb69d 5556 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5557 GFP_NOFS);
acdeb69d 5558 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5559 status = -ENOMEM;
5560 goto out;
5561 }
78fe0f41 5562
79d4e1f0 5563 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5564 GFP_NOFS);
177313f1 5565 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5566 status = -ENOMEM;
acdeb69d 5567 goto out_server_owner;
abe9a6d5 5568 }
78fe0f41 5569
bbafffd2 5570 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5571 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5572 status = -ENOMEM;
5573 goto out_server_scope;
5574 }
5575
1bd714f2 5576 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5577 if (status == 0)
32b01310 5578 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5579
acdeb69d 5580 if (status == 0) {
32b01310
TM		 5581 clp->cl_clientid = res.clientid;
5582 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5583 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5584 clp->cl_seqid = res.seqid;
5585
acdeb69d
CL		 5586 kfree(clp->cl_serverowner);
5587 clp->cl_serverowner = res.server_owner;
5588 res.server_owner = NULL;
78fe0f41 5589
7d2ed9ac 5590 /* use the most recent implementation id */
59155546
CL		 5591 kfree(clp->cl_implid);
5592 clp->cl_implid = res.impl_id;
7d2ed9ac 5593
177313f1 5594 if (clp->cl_serverscope != NULL &&
79d4e1f0 5595 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5596 res.server_scope)) {
5597 dprintk("%s: server_scope mismatch detected\n",
5598 __func__);
5599 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5600 kfree(clp->cl_serverscope);
5601 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5602 }
5603
177313f1 5604 if (clp->cl_serverscope == NULL) {
79d4e1f0 5605 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5606 goto out;
5607 }
32b01310
TM		 5608 } else
5609 kfree(res.impl_id);
7d2ed9ac 5610
acdeb69d
CL		 5611out_server_owner:
5612 kfree(res.server_owner);
7d2ed9ac 5613out_server_scope:
abe9a6d5
WAA		 5614 kfree(res.server_scope);
5615out:
177313f1 5616 if (clp->cl_implid != NULL)
6bbb4ae8 5617 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5618 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5619 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5620 clp->cl_implid->date.seconds,
5621 clp->cl_implid->date.nseconds);
6bbb4ae8 5622 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5623 return status;
5624}
5625
66245539
TM		 5626static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5627 struct rpc_cred *cred)
5628{
5629 struct rpc_message msg = {
5630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5631 .rpc_argp = clp,
5632 .rpc_cred = cred,
5633 };
5634 int status;
5635
5636 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5637 if (status)
02c67525 5638 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5639 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5640 return status;
5641}
5642
5643static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5644 struct rpc_cred *cred)
5645{
5646 unsigned int loop;
5647 int ret;
5648
5649 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5650 ret = _nfs4_proc_destroy_clientid(clp, cred);
5651 switch (ret) {
5652 case -NFS4ERR_DELAY:
5653 case -NFS4ERR_CLIENTID_BUSY:
5654 ssleep(1);
5655 break;
5656 default:
5657 return ret;
5658 }
5659 }
5660 return 0;
5661}
5662
5663int nfs4_destroy_clientid(struct nfs_client *clp)
5664{
5665 struct rpc_cred *cred;
5666 int ret = 0;
5667
5668 if (clp->cl_mvops->minor_version < 1)
5669 goto out;
5670 if (clp->cl_exchange_flags == 0)
5671 goto out;
05f4c350
CL		 5672 if (clp->cl_preserve_clid)
5673 goto out;
66245539
TM		 5674 cred = nfs4_get_exchange_id_cred(clp);
5675 ret = nfs4_proc_destroy_clientid(clp, cred);
5676 if (cred)
5677 put_rpccred(cred);
5678 switch (ret) {
5679 case 0:
5680 case -NFS4ERR_STALE_CLIENTID:
5681 clp->cl_exchange_flags = 0;
5682 }
5683out:
5684 return ret;
5685}
5686
2050f0cc
AA		 5687struct nfs4_get_lease_time_data {
5688 struct nfs4_get_lease_time_args *args;
5689 struct nfs4_get_lease_time_res *res;
5690 struct nfs_client *clp;
5691};
5692
5693static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5694 void *calldata)
5695{
2050f0cc
AA		 5696 struct nfs4_get_lease_time_data *data =
5697 (struct nfs4_get_lease_time_data *)calldata;
5698
5699 dprintk("--> %s\n", __func__);
5700 /* just setup sequence, do not trigger session recovery
5701 since we're invoked within one */
d9afbd1b
TM		 5702 nfs41_setup_sequence(data->clp->cl_session,
5703 &data->args->la_seq_args,
5704 &data->res->lr_seq_res,
5705 task);
2050f0cc
AA		 5706 dprintk("<-- %s\n", __func__);
5707}
5708
5709/*
5710 * Called from nfs4_state_manager thread for session setup, so don't recover
5711 * from sequence operation or clientid errors.
5712 */
5713static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5714{
5715 struct nfs4_get_lease_time_data *data =
5716 (struct nfs4_get_lease_time_data *)calldata;
5717
5718 dprintk("--> %s\n", __func__);
14516c3a
TM		 5719 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5720 return;
2050f0cc
AA		 5721 switch (task->tk_status) {
5722 case -NFS4ERR_DELAY:
5723 case -NFS4ERR_GRACE:
5724 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5725 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5726 task->tk_status = 0;
a8a4ae3a
AA		 5727 /* fall through */
5728 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5729 rpc_restart_call_prepare(task);
2050f0cc
AA		 5730 return;
5731 }
2050f0cc
AA		 5732 dprintk("<-- %s\n", __func__);
5733}
5734
17280175 5735static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5736 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5737 .rpc_call_done = nfs4_get_lease_time_done,
5738};
5739
5740int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5741{
5742 struct rpc_task *task;
5743 struct nfs4_get_lease_time_args args;
5744 struct nfs4_get_lease_time_res res = {
5745 .lr_fsinfo = fsinfo,
5746 };
5747 struct nfs4_get_lease_time_data data = {
5748 .args = &args,
5749 .res = &res,
5750 .clp = clp,
5751 };
5752 struct rpc_message msg = {
5753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5754 .rpc_argp = &args,
5755 .rpc_resp = &res,
5756 };
5757 struct rpc_task_setup task_setup = {
5758 .rpc_client = clp->cl_rpcclient,
5759 .rpc_message = &msg,
5760 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5761 .callback_data = &data,
5762 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5763 };
5764 int status;
5765
9d12b216 5766 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5767 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5768 dprintk("--> %s\n", __func__);
5769 task = rpc_run_task(&task_setup);
5770
5771 if (IS_ERR(task))
5772 status = PTR_ERR(task);
5773 else {
5774 status = task->tk_status;
5775 rpc_put_task(task);
5776 }
5777 dprintk("<-- %s return %d\n", __func__, status);
5778
5779 return status;
5780}
5781
fc931582
AA		 5782/*
5783 * Initialize the values to be used by the client in CREATE_SESSION
5784 * If nfs4_init_session set the fore channel request and response sizes,
5785 * use them.
5786 *
5787 * Set the back channel max_resp_sz_cached to zero to force the client to
5788 * always set csa_cachethis to FALSE because the current implementation
5789 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5790 */
5791static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5792{
5793 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5794 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5795 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5796
5797 if (mxrqst_sz == 0)
5798 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5799 if (mxresp_sz == 0)
5800 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5801 /* Fore channel attributes */
fc931582
AA		 5802 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5803 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5804 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5805 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5806
5807 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5808 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5809 __func__,
5810 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5811 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5812
5813 /* Back channel attributes */
fc931582
AA		 5814 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5815 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5816 args->bc_attrs.max_resp_sz_cached = 0;
5817 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5818 args->bc_attrs.max_reqs = 1;
5819
5820 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5821 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5822 __func__,
5823 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5824 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5825 args->bc_attrs.max_reqs);
5826}
5827
43c2e885 5828static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5829{
43c2e885
BF		 5830 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5831 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5832
43c2e885
BF		 5833 if (rcvd->max_resp_sz > sent->max_resp_sz)
5834 return -EINVAL;
5835 /*
5836 * Our requested max_ops is the minimum we need; we're not
5837 * prepared to break up compounds into smaller pieces than that.
5838 * So, no point even trying to continue if the server won't
5839 * cooperate:
5840 */
5841 if (rcvd->max_ops < sent->max_ops)
5842 return -EINVAL;
5843 if (rcvd->max_reqs == 0)
5844 return -EINVAL;
b4b9a0c1
VG		 5845 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5846 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5847 return 0;
8d35301d
AA		 5848}
5849
43c2e885
BF		 5850static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5851{
5852 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5853 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5854
43c2e885
BF		 5855 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5856 return -EINVAL;
5857 if (rcvd->max_resp_sz < sent->max_resp_sz)
5858 return -EINVAL;
5859 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5860 return -EINVAL;
5861 /* These would render the backchannel useless: */
b4b9a0c1 5862 if (rcvd->max_ops != sent->max_ops)
43c2e885 5863 return -EINVAL;
b4b9a0c1 5864 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5865 return -EINVAL;
5866 return 0;
5867}
8d35301d 5868
8d35301d
AA		 5869static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5870 struct nfs4_session *session)
5871{
43c2e885 5872 int ret;
8d35301d 5873
43c2e885
BF		 5874 ret = nfs4_verify_fore_channel_attrs(args, session);
5875 if (ret)
5876 return ret;
5877 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5878}
5879
848f5bda
TM		 5880static int _nfs4_proc_create_session(struct nfs_client *clp,
5881 struct rpc_cred *cred)
fc931582
AA		 5882{
5883 struct nfs4_session *session = clp->cl_session;
5884 struct nfs41_create_session_args args = {
5885 .client = clp,
5886 .cb_program = NFS4_CALLBACK,
5887 };
5888 struct nfs41_create_session_res res = {
5889 .client = clp,
5890 };
5891 struct rpc_message msg = {
5892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5893 .rpc_argp = &args,
5894 .rpc_resp = &res,
848f5bda 5895 .rpc_cred = cred,
fc931582
AA		 5896 };
5897 int status;
5898
5899 nfs4_init_channel_attrs(&args);
0f91421e 5900 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5901
1bd714f2 5902 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5903
43095d39 5904 if (!status) {
8d35301d
AA		 5905 /* Verify the session's negotiated channel_attrs values */
5906 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5907 /* Increment the clientid slot sequence id */
5908 clp->cl_seqid++;
5909 }
5910
5911 return status;
5912}
5913
5914/*
5915 * Issues a CREATE_SESSION operation to the server.
5916 * It is the responsibility of the caller to verify the session is
5917 * expired before calling this routine.
5918 */
848f5bda 5919int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5920{
5921 int status;
5922 unsigned *ptr;
fc931582
AA		 5923 struct nfs4_session *session = clp->cl_session;
5924
5925 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5926
848f5bda 5927 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5928 if (status)
5929 goto out;
5930
aacd5537
AA		 5931 /* Init or reset the session slot tables */
5932 status = nfs4_setup_session_slot_tables(session);
5933 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5934 if (status)
5935 goto out;
5936
5937 ptr = (unsigned *)&session->sess_id.data[0];
5938 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5939 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5940out:
5941 dprintk("<-- %s\n", __func__);
5942 return status;
5943}
5944
0f3e66c6
AA		 5945/*
5946 * Issue the over-the-wire RPC DESTROY_SESSION.
5947 * The caller must serialize access to this routine.
5948 */
848f5bda
TM		 5949int nfs4_proc_destroy_session(struct nfs4_session *session,
5950 struct rpc_cred *cred)
0f3e66c6 5951{
848f5bda
TM		 5952 struct rpc_message msg = {
5953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5954 .rpc_argp = session,
5955 .rpc_cred = cred,
5956 };
0f3e66c6 5957 int status = 0;
0f3e66c6
AA		 5958
5959 dprintk("--> nfs4_proc_destroy_session\n");
5960
5961 /* session is still being setup */
5962 if (session->clp->cl_cons_state != NFS_CS_READY)
5963 return status;
5964
1bd714f2 5965 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5966
5967 if (status)
08106ac7 5968 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5969 "Session has been destroyed regardless...\n", status);
5970
5971 dprintk("<-- nfs4_proc_destroy_session\n");
5972 return status;
5973}
5974
fc01cea9
AA		 5975/*
5976 * Renew the cl_session lease.
5977 */
d5f8d3fe
TM		 5978struct nfs4_sequence_data {
5979 struct nfs_client *clp;
5980 struct nfs4_sequence_args args;
5981 struct nfs4_sequence_res res;
5982};
5983
dc96aef9
AB		 5984static void nfs41_sequence_release(void *data)
5985{
d5f8d3fe
TM		 5986 struct nfs4_sequence_data *calldata = data;
5987 struct nfs_client *clp = calldata->clp;
dc96aef9 5988
7135840f
AB		 5989 if (atomic_read(&clp->cl_count) > 1)
5990 nfs4_schedule_state_renewal(clp);
5991 nfs_put_client(clp);
d5f8d3fe 5992 kfree(calldata);
dc96aef9
AB		 5993}
5994
aa5190d0
TM		 5995static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5996{
5997 switch(task->tk_status) {
5998 case -NFS4ERR_DELAY:
aa5190d0
TM		 5999 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6000 return -EAGAIN;
6001 default:
0400a6b0 6002 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6003 }
6004 return 0;
6005}
6006
dc96aef9 6007static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6008{
d5f8d3fe
TM		 6009 struct nfs4_sequence_data *calldata = data;
6010 struct nfs_client *clp = calldata->clp;
fc01cea9 6011
14516c3a
TM		 6012 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6013 return;
fc01cea9
AA		 6014
6015 if (task->tk_status < 0) {
6016 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6017 if (atomic_read(&clp->cl_count) == 1)
6018 goto out;
fc01cea9 6019
aa5190d0
TM		 6020 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6021 rpc_restart_call_prepare(task);
fc01cea9
AA		 6022 return;
6023 }
6024 }
fc01cea9 6025 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6026out:
fc01cea9
AA		 6027 dprintk("<-- %s\n", __func__);
6028}
6029
6030static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6031{
d5f8d3fe
TM		 6032 struct nfs4_sequence_data *calldata = data;
6033 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6034 struct nfs4_sequence_args *args;
6035 struct nfs4_sequence_res *res;
6036
fc01cea9
AA		 6037 args = task->tk_msg.rpc_argp;
6038 res = task->tk_msg.rpc_resp;
6039
d9afbd1b 6040 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6041}
6042
6043static const struct rpc_call_ops nfs41_sequence_ops = {
6044 .rpc_call_done = nfs41_sequence_call_done,
6045 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6046 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6047};
6048
8fe72bac
TM		 6049static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6050 struct rpc_cred *cred,
6051 bool is_privileged)
fc01cea9 6052{
d5f8d3fe 6053 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6054 struct rpc_message msg = {
6055 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6056 .rpc_cred = cred,
6057 };
71ac6da9
TM		 6058 struct rpc_task_setup task_setup_data = {
6059 .rpc_client = clp->cl_rpcclient,
6060 .rpc_message = &msg,
8fe72bac 6061 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6062 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6063 };
fc01cea9 6064
7135840f 6065 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6066 return ERR_PTR(-EIO);
dfb4f309 6067 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6068 if (calldata == NULL) {
7135840f 6069 nfs_put_client(clp);
71ac6da9 6070 return ERR_PTR(-ENOMEM);
fc01cea9 6071 }
9d12b216 6072 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6073 if (is_privileged)
6074 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6075 msg.rpc_argp = &calldata->args;
6076 msg.rpc_resp = &calldata->res;
6077 calldata->clp = clp;
71ac6da9 6078 task_setup_data.callback_data = calldata;
fc01cea9 6079
71ac6da9
TM		 6080 return rpc_run_task(&task_setup_data);
6081}
6082
2f60ea6b 6083static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6084{
6085 struct rpc_task *task;
6086 int ret = 0;
6087
2f60ea6b
TM		 6088 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6089 return 0;
8fe72bac 6090 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6091 if (IS_ERR(task))
6092 ret = PTR_ERR(task);
6093 else
bf294b41 6094 rpc_put_task_async(task);
71ac6da9
TM		 6095 dprintk("<-- %s status=%d\n", __func__, ret);
6096 return ret;
6097}
6098
6099static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6100{
6101 struct rpc_task *task;
6102 int ret;
6103
8fe72bac 6104 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6105 if (IS_ERR(task)) {
6106 ret = PTR_ERR(task);
6107 goto out;
6108 }
6109 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6110 if (!ret) {
6111 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6112
6113 if (task->tk_status == 0)
6114 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6115 ret = task->tk_status;
b4410c2f 6116 }
71ac6da9
TM		 6117 rpc_put_task(task);
6118out:
6119 dprintk("<-- %s status=%d\n", __func__, ret);
6120 return ret;
fc01cea9
AA		 6121}
6122
fce5c838
RL		 6123struct nfs4_reclaim_complete_data {
6124 struct nfs_client *clp;
6125 struct nfs41_reclaim_complete_args arg;
6126 struct nfs41_reclaim_complete_res res;
6127};
6128
6129static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6130{
6131 struct nfs4_reclaim_complete_data *calldata = data;
6132
d9afbd1b
TM		 6133 nfs41_setup_sequence(calldata->clp->cl_session,
6134 &calldata->arg.seq_args,
6135 &calldata->res.seq_res,
6136 task);
fce5c838
RL		 6137}
6138
aa5190d0
TM		 6139static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6140{
6141 switch(task->tk_status) {
6142 case 0:
6143 case -NFS4ERR_COMPLETE_ALREADY:
6144 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6145 break;
6146 case -NFS4ERR_DELAY:
aa5190d0 6147 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6148 /* fall through */
6149 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6150 return -EAGAIN;
6151 default:
0400a6b0 6152 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6153 }
6154 return 0;
6155}
6156
fce5c838
RL		 6157static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6158{
6159 struct nfs4_reclaim_complete_data *calldata = data;
6160 struct nfs_client *clp = calldata->clp;
6161 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6162
6163 dprintk("--> %s\n", __func__);
14516c3a
TM		 6164 if (!nfs41_sequence_done(task, res))
6165 return;
fce5c838 6166
aa5190d0
TM		 6167 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6168 rpc_restart_call_prepare(task);
6169 return;
6170 }
fce5c838
RL		 6171 dprintk("<-- %s\n", __func__);
6172}
6173
6174static void nfs4_free_reclaim_complete_data(void *data)
6175{
6176 struct nfs4_reclaim_complete_data *calldata = data;
6177
6178 kfree(calldata);
6179}
6180
6181static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6182 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6183 .rpc_call_done = nfs4_reclaim_complete_done,
6184 .rpc_release = nfs4_free_reclaim_complete_data,
6185};
6186
6187/*
6188 * Issue a global reclaim complete.
6189 */
6190static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6191{
6192 struct nfs4_reclaim_complete_data *calldata;
6193 struct rpc_task *task;
6194 struct rpc_message msg = {
6195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6196 };
6197 struct rpc_task_setup task_setup_data = {
6198 .rpc_client = clp->cl_rpcclient,
6199 .rpc_message = &msg,
6200 .callback_ops = &nfs4_reclaim_complete_call_ops,
6201 .flags = RPC_TASK_ASYNC,
6202 };
6203 int status = -ENOMEM;
6204
6205 dprintk("--> %s\n", __func__);
8535b2be 6206 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6207 if (calldata == NULL)
6208 goto out;
6209 calldata->clp = clp;
6210 calldata->arg.one_fs = 0;
fce5c838 6211
9d12b216 6212 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6213 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6214 msg.rpc_argp = &calldata->arg;
6215 msg.rpc_resp = &calldata->res;
6216 task_setup_data.callback_data = calldata;
6217 task = rpc_run_task(&task_setup_data);
acf82b85 6218 if (IS_ERR(task)) {
fce5c838 6219 status = PTR_ERR(task);
acf82b85
DC		 6220 goto out;
6221 }
c34c32ea
AA		 6222 status = nfs4_wait_for_completion_rpc_task(task);
6223 if (status == 0)
6224 status = task->tk_status;
fce5c838 6225 rpc_put_task(task);
acf82b85 6226 return 0;
fce5c838
RL		 6227out:
6228 dprintk("<-- %s status=%d\n", __func__, status);
6229 return status;
6230}
b1f69b75
AA		 6231
6232static void
6233nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6234{
6235 struct nfs4_layoutget *lgp = calldata;
c31663d4 6236 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6237 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6238
6239 dprintk("--> %s\n", __func__);
c31663d4
FI		 6240 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6241 * right now covering the LAYOUTGET we are about to send.
6242 * However, that is not so catastrophic, and there seems
6243 * to be no way to prevent it completely.
6244 */
6ba7db34 6245 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6246 &lgp->res.seq_res, task))
b1f69b75 6247 return;
cf7d63f1
FI		 6248 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6249 NFS_I(lgp->args.inode)->layout,
6250 lgp->args.ctx->state)) {
6251 rpc_exit(task, NFS4_OK);
cf7d63f1 6252 }
b1f69b75
AA		 6253}
6254
6255static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6256{
6257 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6258 struct inode *inode = lgp->args.inode;
6259 struct nfs_server *server = NFS_SERVER(inode);
6260 struct pnfs_layout_hdr *lo;
6261 struct nfs4_state *state = NULL;
30005121 6262 unsigned long timeo, giveup;
b1f69b75
AA		 6263
6264 dprintk("--> %s\n", __func__);
6265
6ba7db34 6266 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6267 goto out;
b1f69b75
AA		 6268
6269 switch (task->tk_status) {
6270 case 0:
ee314c2a 6271 goto out;
b1f69b75
AA		 6272 case -NFS4ERR_LAYOUTTRYLATER:
6273 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6274 timeo = rpc_get_timeout(task->tk_client);
6275 giveup = lgp->args.timestamp + timeo;
6276 if (time_after(giveup, jiffies))
6277 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6278 break;
6279 case -NFS4ERR_EXPIRED:
6280 case -NFS4ERR_BAD_STATEID:
6281 spin_lock(&inode->i_lock);
6282 lo = NFS_I(inode)->layout;
6283 if (!lo || list_empty(&lo->plh_segs)) {
6284 spin_unlock(&inode->i_lock);
6285 /* If the open stateid was bad, then recover it. */
6286 state = lgp->args.ctx->state;
6287 } else {
6288 LIST_HEAD(head);
6289
6290 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6291 spin_unlock(&inode->i_lock);
6292 /* Mark the bad layout state as invalid, then
6293 * retry using the open stateid. */
6294 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6295 }
6296 }
ee314c2a
TM		 6297 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6298 rpc_restart_call_prepare(task);
6299out:
b1f69b75
AA		 6300 dprintk("<-- %s\n", __func__);
6301}
6302
8554116e
IK		 6303static size_t max_response_pages(struct nfs_server *server)
6304{
6305 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6306 return nfs_page_array_len(0, max_resp_sz);
6307}
6308
6309static void nfs4_free_pages(struct page **pages, size_t size)
6310{
6311 int i;
6312
6313 if (!pages)
6314 return;
6315
6316 for (i = 0; i < size; i++) {
6317 if (!pages[i])
6318 break;
6319 __free_page(pages[i]);
6320 }
6321 kfree(pages);
6322}
6323
6324static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6325{
6326 struct page **pages;
6327 int i;
6328
6329 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6330 if (!pages) {
6331 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6332 return NULL;
6333 }
6334
6335 for (i = 0; i < size; i++) {
6336 pages[i] = alloc_page(gfp_flags);
6337 if (!pages[i]) {
6338 dprintk("%s: failed to allocate page\n", __func__);
6339 nfs4_free_pages(pages, size);
6340 return NULL;
6341 }
6342 }
6343
6344 return pages;
6345}
6346
b1f69b75
AA		 6347static void nfs4_layoutget_release(void *calldata)
6348{
6349 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6350 struct inode *inode = lgp->args.inode;
6351 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6352 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6353
6354 dprintk("--> %s\n", __func__);
8554116e 6355 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6356 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6357 put_nfs_open_context(lgp->args.ctx);
6358 kfree(calldata);
6359 dprintk("<-- %s\n", __func__);
6360}
6361
6362static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6363 .rpc_call_prepare = nfs4_layoutget_prepare,
6364 .rpc_call_done = nfs4_layoutget_done,
6365 .rpc_release = nfs4_layoutget_release,
6366};
6367
a0b0a6e3
TM		 6368struct pnfs_layout_segment *
6369nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6370{
a47970ff
WAA		 6371 struct inode *inode = lgp->args.inode;
6372 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6373 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6374 struct rpc_task *task;
6375 struct rpc_message msg = {
6376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6377 .rpc_argp = &lgp->args,
6378 .rpc_resp = &lgp->res,
6379 };
6380 struct rpc_task_setup task_setup_data = {
6381 .rpc_client = server->client,
6382 .rpc_message = &msg,
6383 .callback_ops = &nfs4_layoutget_call_ops,
6384 .callback_data = lgp,
6385 .flags = RPC_TASK_ASYNC,
6386 };
a0b0a6e3 6387 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6388 int status = 0;
6389
6390 dprintk("--> %s\n", __func__);
6391
8554116e
IK		 6392 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6393 if (!lgp->args.layout.pages) {
6394 nfs4_layoutget_release(lgp);
a0b0a6e3 6395 return ERR_PTR(-ENOMEM);
8554116e
IK		 6396 }
6397 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6398 lgp->args.timestamp = jiffies;
8554116e 6399
35124a09 6400 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6401 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6402 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6403
6404 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6405 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6406
b1f69b75
AA		 6407 task = rpc_run_task(&task_setup_data);
6408 if (IS_ERR(task))
a0b0a6e3 6409 return ERR_CAST(task);
b1f69b75 6410 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6411 if (status == 0)
6412 status = task->tk_status;
085b7a45
WAA		 6413 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6414 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6415 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6416 rpc_put_task(task);
6417 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6418 if (status)
6419 return ERR_PTR(status);
6420 return lseg;
b1f69b75
AA		 6421}
6422
cbe82603
BH		 6423static void
6424nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6425{
6426 struct nfs4_layoutreturn *lrp = calldata;
6427
6428 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6429 nfs41_setup_sequence(lrp->clp->cl_session,
6430 &lrp->args.seq_args,
6431 &lrp->res.seq_res,
6432 task);
cbe82603
BH		 6433}
6434
6435static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6436{
6437 struct nfs4_layoutreturn *lrp = calldata;
6438 struct nfs_server *server;
6439
6440 dprintk("--> %s\n", __func__);
6441
6ba7db34 6442 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6443 return;
6444
6445 server = NFS_SERVER(lrp->args.inode);
6446 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6447 rpc_restart_call_prepare(task);
cbe82603
BH		 6448 return;
6449 }
cbe82603
BH		 6450 dprintk("<-- %s\n", __func__);
6451}
6452
6453static void nfs4_layoutreturn_release(void *calldata)
6454{
6455 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6456 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6457
6458 dprintk("--> %s\n", __func__);
849b286f
TM		 6459 spin_lock(&lo->plh_inode->i_lock);
6460 if (lrp->res.lrs_present)
6461 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6462 lo->plh_block_lgets--;
6463 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6464 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6465 kfree(calldata);
6466 dprintk("<-- %s\n", __func__);
6467}
6468
6469static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6470 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6471 .rpc_call_done = nfs4_layoutreturn_done,
6472 .rpc_release = nfs4_layoutreturn_release,
6473};
6474
6475int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6476{
6477 struct rpc_task *task;
6478 struct rpc_message msg = {
6479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6480 .rpc_argp = &lrp->args,
6481 .rpc_resp = &lrp->res,
6482 };
6483 struct rpc_task_setup task_setup_data = {
6484 .rpc_client = lrp->clp->cl_rpcclient,
6485 .rpc_message = &msg,
6486 .callback_ops = &nfs4_layoutreturn_call_ops,
6487 .callback_data = lrp,
6488 };
6489 int status;
6490
6491 dprintk("--> %s\n", __func__);
9d12b216 6492 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6493 task = rpc_run_task(&task_setup_data);
6494 if (IS_ERR(task))
6495 return PTR_ERR(task);
6496 status = task->tk_status;
6497 dprintk("<-- %s status=%d\n", __func__, status);
6498 rpc_put_task(task);
6499 return status;
6500}
6501
7f11d8d3
AA		 6502/*
6503 * Retrieve the list of Data Server devices from the MDS.
6504 */
6505static int _nfs4_getdevicelist(struct nfs_server *server,
6506 const struct nfs_fh *fh,
6507 struct pnfs_devicelist *devlist)
6508{
6509 struct nfs4_getdevicelist_args args = {
6510 .fh = fh,
6511 .layoutclass = server->pnfs_curr_ld->id,
6512 };
6513 struct nfs4_getdevicelist_res res = {
6514 .devlist = devlist,
6515 };
6516 struct rpc_message msg = {
6517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6518 .rpc_argp = &args,
6519 .rpc_resp = &res,
6520 };
6521 int status;
6522
6523 dprintk("--> %s\n", __func__);
6524 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6525 &res.seq_res, 0);
6526 dprintk("<-- %s status=%d\n", __func__, status);
6527 return status;
6528}
6529
6530int nfs4_proc_getdevicelist(struct nfs_server *server,
6531 const struct nfs_fh *fh,
6532 struct pnfs_devicelist *devlist)
6533{
6534 struct nfs4_exception exception = { };
6535 int err;
6536
6537 do {
6538 err = nfs4_handle_exception(server,
6539 _nfs4_getdevicelist(server, fh, devlist),
6540 &exception);
6541 } while (exception.retry);
6542
6543 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6544 err, devlist->num_devs);
6545
6546 return err;
6547}
6548EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6549
b1f69b75
AA		 6550static int
6551_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6552{
6553 struct nfs4_getdeviceinfo_args args = {
6554 .pdev = pdev,
6555 };
6556 struct nfs4_getdeviceinfo_res res = {
6557 .pdev = pdev,
6558 };
6559 struct rpc_message msg = {
6560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6561 .rpc_argp = &args,
6562 .rpc_resp = &res,
6563 };
6564 int status;
6565
6566 dprintk("--> %s\n", __func__);
7c513058 6567 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6568 dprintk("<-- %s status=%d\n", __func__, status);
6569
6570 return status;
6571}
6572
6573int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6574{
6575 struct nfs4_exception exception = { };
6576 int err;
6577
6578 do {
6579 err = nfs4_handle_exception(server,
6580 _nfs4_proc_getdeviceinfo(server, pdev),
6581 &exception);
6582 } while (exception.retry);
6583 return err;
6584}
6585EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6586
863a3c6c
AA		 6587static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6588{
6589 struct nfs4_layoutcommit_data *data = calldata;
6590 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6591 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6592
d9afbd1b
TM		 6593 nfs41_setup_sequence(session,
6594 &data->args.seq_args,
6595 &data->res.seq_res,
6596 task);
863a3c6c
AA		 6597}
6598
6599static void
6600nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6601{
6602 struct nfs4_layoutcommit_data *data = calldata;
6603 struct nfs_server *server = NFS_SERVER(data->args.inode);
6604
6ba7db34 6605 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6606 return;
6607
6608 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6609 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6610 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6611 case -NFS4ERR_BADLAYOUT: /* no layout */
6612 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6613 task->tk_status = 0;
e59d27e0
TM		 6614 break;
6615 case 0:
863a3c6c
AA		 6616 nfs_post_op_update_inode_force_wcc(data->args.inode,
6617 data->res.fattr);
e59d27e0
TM		 6618 break;
6619 default:
6620 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6621 rpc_restart_call_prepare(task);
6622 return;
6623 }
6624 }
863a3c6c
AA		 6625}
6626
6627static void nfs4_layoutcommit_release(void *calldata)
6628{
6629 struct nfs4_layoutcommit_data *data = calldata;
6630
db29c089 6631 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6632 put_rpccred(data->cred);
6633 kfree(data);
6634}
6635
6636static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6637 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6638 .rpc_call_done = nfs4_layoutcommit_done,
6639 .rpc_release = nfs4_layoutcommit_release,
6640};
6641
6642int
ef311537 6643nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6644{
6645 struct rpc_message msg = {
6646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6647 .rpc_argp = &data->args,
6648 .rpc_resp = &data->res,
6649 .rpc_cred = data->cred,
6650 };
6651 struct rpc_task_setup task_setup_data = {
6652 .task = &data->task,
6653 .rpc_client = NFS_CLIENT(data->args.inode),
6654 .rpc_message = &msg,
6655 .callback_ops = &nfs4_layoutcommit_ops,
6656 .callback_data = data,
6657 .flags = RPC_TASK_ASYNC,
6658 };
6659 struct rpc_task *task;
6660 int status = 0;
6661
6662 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6663 "lbw: %llu inode %lu\n",
6664 data->task.tk_pid, sync,
6665 data->args.lastbytewritten,
6666 data->args.inode->i_ino);
6667
9d12b216 6668 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6669 task = rpc_run_task(&task_setup_data);
6670 if (IS_ERR(task))
6671 return PTR_ERR(task);
ef311537 6672 if (sync == false)
863a3c6c
AA		 6673 goto out;
6674 status = nfs4_wait_for_completion_rpc_task(task);
6675 if (status != 0)
6676 goto out;
6677 status = task->tk_status;
6678out:
6679 dprintk("%s: status %d\n", __func__, status);
6680 rpc_put_task(task);
6681 return status;
6682}
fca78d6d
BS		 6683
6684static int
6685_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6686 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6687{
6688 struct nfs41_secinfo_no_name_args args = {
6689 .style = SECINFO_STYLE_CURRENT_FH,
6690 };
6691 struct nfs4_secinfo_res res = {
6692 .flavors = flavors,
6693 };
6694 struct rpc_message msg = {
6695 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6696 .rpc_argp = &args,
6697 .rpc_resp = &res,
6698 };
6699 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6700}
6701
6702static int
6703nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6704 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6705{
6706 struct nfs4_exception exception = { };
6707 int err;
6708 do {
6709 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6710 switch (err) {
6711 case 0:
6712 case -NFS4ERR_WRONGSEC:
6713 case -NFS4ERR_NOTSUPP:
05e9cfb4 6714 goto out;
fca78d6d
BS		 6715 default:
6716 err = nfs4_handle_exception(server, err, &exception);
6717 }
6718 } while (exception.retry);
05e9cfb4 6719out:
fca78d6d
BS		 6720 return err;
6721}
6722
6723static int
6724nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6725 struct nfs_fsinfo *info)
6726{
6727 int err;
6728 struct page *page;
6729 rpc_authflavor_t flavor;
6730 struct nfs4_secinfo_flavors *flavors;
6731
6732 page = alloc_page(GFP_KERNEL);
6733 if (!page) {
6734 err = -ENOMEM;
6735 goto out;
6736 }
6737
6738 flavors = page_address(page);
6739 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6740
6741 /*
6742 * Fall back on "guess and check" method if
6743 * the server doesn't support SECINFO_NO_NAME
6744 */
6745 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6746 err = nfs4_find_root_sec(server, fhandle, info);
6747 goto out_freepage;
6748 }
6749 if (err)
6750 goto out_freepage;
6751
6752 flavor = nfs_find_best_sec(flavors);
6753 if (err == 0)
6754 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6755
6756out_freepage:
6757 put_page(page);
6758 if (err == -EACCES)
6759 return -EPERM;
6760out:
6761 return err;
6762}
1cab0652
BS		 6763
6764static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6765{
6766 int status;
6767 struct nfs41_test_stateid_args args = {
1cab0652 6768 .stateid = stateid,
7d974794
BS		 6769 };
6770 struct nfs41_test_stateid_res res;
6771 struct rpc_message msg = {
6772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6773 .rpc_argp = &args,
6774 .rpc_resp = &res,
6775 };
1cab0652 6776
38527b15 6777 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6778 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6779 nfs4_set_sequence_privileged(&args.seq_args);
6780 status = nfs4_call_sync_sequence(server->client, server, &msg,
6781 &args.seq_args, &res.seq_res);
38527b15
CL		 6782 if (status != NFS_OK) {
6783 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6784 return status;
38527b15
CL		 6785 }
6786 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6787 return -res.status;
7d974794
BS		 6788}
6789
38527b15
CL		 6790/**
6791 * nfs41_test_stateid - perform a TEST_STATEID operation
6792 *
6793 * @server: server / transport on which to perform the operation
6794 * @stateid: state ID to test
6795 *
6796 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6797 * Otherwise a negative NFS4ERR value is returned if the operation
6798 * failed or the state ID is not currently valid.
6799 */
1cab0652 6800static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6801{
6802 struct nfs4_exception exception = { };
6803 int err;
6804 do {
377e507d
CL		 6805 err = _nfs41_test_stateid(server, stateid);
6806 if (err != -NFS4ERR_DELAY)
6807 break;
6808 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6809 } while (exception.retry);
6810 return err;
6811}
9aeda35f 6812
7c1d5fae
TM		 6813struct nfs_free_stateid_data {
6814 struct nfs_server *server;
6815 struct nfs41_free_stateid_args args;
9aeda35f 6816 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 6817};
6818
6819static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
6820{
6821 struct nfs_free_stateid_data *data = calldata;
6822 nfs41_setup_sequence(nfs4_get_session(data->server),
6823 &data->args.seq_args,
6824 &data->res.seq_res,
6825 task);
6826}
6827
6828static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
6829{
6830 struct nfs_free_stateid_data *data = calldata;
6831
6832 nfs41_sequence_done(task, &data->res.seq_res);
6833
6834 switch (task->tk_status) {
6835 case -NFS4ERR_DELAY:
6836 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
6837 rpc_restart_call_prepare(task);
6838 }
6839}
6840
6841static void nfs41_free_stateid_release(void *calldata)
6842{
6843 kfree(calldata);
6844}
6845
6846const struct rpc_call_ops nfs41_free_stateid_ops = {
6847 .rpc_call_prepare = nfs41_free_stateid_prepare,
6848 .rpc_call_done = nfs41_free_stateid_done,
6849 .rpc_release = nfs41_free_stateid_release,
6850};
6851
6852static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
6853 nfs4_stateid *stateid,
6854 bool privileged)
6855{
9aeda35f
BS		 6856 struct rpc_message msg = {
6857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9aeda35f 6858 };
7c1d5fae
TM		 6859 struct rpc_task_setup task_setup = {
6860 .rpc_client = server->client,
6861 .rpc_message = &msg,
6862 .callback_ops = &nfs41_free_stateid_ops,
6863 .flags = RPC_TASK_ASYNC,
6864 };
6865 struct nfs_free_stateid_data *data;
9aeda35f 6866
38527b15 6867 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 6868 data = kmalloc(sizeof(*data), GFP_NOFS);
6869 if (!data)
6870 return ERR_PTR(-ENOMEM);
6871 data->server = server;
6872 nfs4_stateid_copy(&data->args.stateid, stateid);
6873
6874 task_setup.callback_data = data;
6875
6876 msg.rpc_argp = &data->args;
6877 msg.rpc_resp = &data->res;
6878 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6879 if (privileged)
6880 nfs4_set_sequence_privileged(&data->args.seq_args);
6881
6882 return rpc_run_task(&task_setup);
9aeda35f
BS		 6883}
6884
38527b15
CL		 6885/**
6886 * nfs41_free_stateid - perform a FREE_STATEID operation
6887 *
6888 * @server: server / transport on which to perform the operation
6889 * @stateid: state ID to release
6890 *
6891 * Returns NFS_OK if the server freed "stateid". Otherwise a
6892 * negative NFS4ERR value is returned.
6893 */
1cab0652 6894static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6895{
7c1d5fae
TM		 6896 struct rpc_task *task;
6897 int ret;
6898
6899 task = _nfs41_free_stateid(server, stateid, true);
6900 if (IS_ERR(task))
6901 return PTR_ERR(task);
6902 ret = rpc_wait_for_completion_task(task);
6903 if (!ret)
6904 ret = task->tk_status;
6905 rpc_put_task(task);
6906 return ret;
9aeda35f 6907}
36281caa 6908
c8b2d0bf
TM		 6909static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
6910{
6911 struct rpc_task *task;
6912
6913 task = _nfs41_free_stateid(server, &lsp->ls_stateid, false);
6914 nfs4_free_lock_state(server, lsp);
6915 if (IS_ERR(task))
6916 return PTR_ERR(task);
6917 rpc_put_task(task);
6918 return 0;
6919}
6920
36281caa
TM		 6921static bool nfs41_match_stateid(const nfs4_stateid *s1,
6922 const nfs4_stateid *s2)
6923{
2d2f24ad 6924 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6925 return false;
6926
2d2f24ad 6927 if (s1->seqid == s2->seqid)
36281caa 6928 return true;
2d2f24ad 6929 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6930 return true;
6931
6932 return false;
6933}
6934
557134a3
AA		 6935#endif /* CONFIG_NFS_V4_1 */
6936
36281caa
TM		 6937static bool nfs4_match_stateid(const nfs4_stateid *s1,
6938 const nfs4_stateid *s2)
6939{
f597c537 6940 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6941}
6942
6943
17280175 6944static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6945 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6946 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6947 .recover_open = nfs4_open_reclaim,
6948 .recover_lock = nfs4_lock_reclaim,
591d71cb 6949 .establish_clid = nfs4_init_clientid,
90a16617 6950 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6951 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6952};
6953
591d71cb 6954#if defined(CONFIG_NFS_V4_1)
17280175 6955static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6956 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6957 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6958 .recover_open = nfs4_open_reclaim,
6959 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6960 .establish_clid = nfs41_init_clientid,
b4b82607 6961 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6962 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6963 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6964};
6965#endif /* CONFIG_NFS_V4_1 */
6966
17280175 6967static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6968 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6969 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6970 .recover_open = nfs4_open_expired,
6971 .recover_lock = nfs4_lock_expired,
6972 .establish_clid = nfs4_init_clientid,
90a16617 6973 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6974};
6975
6976#if defined(CONFIG_NFS_V4_1)
17280175 6977static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6978 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6979 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6980 .recover_open = nfs41_open_expired,
6981 .recover_lock = nfs41_lock_expired,
4d643d1d 6982 .establish_clid = nfs41_init_clientid,
b4b82607 6983 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6984};
591d71cb 6985#endif /* CONFIG_NFS_V4_1 */
1da177e4 6986
17280175 6987static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6988 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6989 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6990 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6991};
6992
6993#if defined(CONFIG_NFS_V4_1)
17280175 6994static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6995 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6996 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6997 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6998};
6999#endif
7000
97dc1359
TM		 7001static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7002 .minor_version = 0,
39c6daae
TM		 7003 .init_caps = NFS_CAP_READDIRPLUS
7004 | NFS_CAP_ATOMIC_OPEN
7005 | NFS_CAP_CHANGE_ATTR
7006 | NFS_CAP_POSIX_LOCK,
97dc1359 7007 .call_sync = _nfs4_call_sync,
36281caa 7008 .match_stateid = nfs4_match_stateid,
fca78d6d 7009 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7010 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7011 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7012 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7013 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7014};
7015
7016#if defined(CONFIG_NFS_V4_1)
7017static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7018 .minor_version = 1,
39c6daae
TM		 7019 .init_caps = NFS_CAP_READDIRPLUS
7020 | NFS_CAP_ATOMIC_OPEN
7021 | NFS_CAP_CHANGE_ATTR
3b66486c 7022 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7023 | NFS_CAP_STATEID_NFSV41
7024 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7025 .call_sync = nfs4_call_sync_sequence,
36281caa 7026 .match_stateid = nfs41_match_stateid,
fca78d6d 7027 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7028 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7029 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7030 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7031 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7032};
7033#endif
7034
42c2c424
SD		 7035#if defined(CONFIG_NFS_V4_2)
7036static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7037 .minor_version = 2,
7038 .call_sync = nfs4_call_sync_sequence,
7039 .match_stateid = nfs41_match_stateid,
7040 .find_root_sec = nfs41_find_root_sec,
7041 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7042 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7043 .state_renewal_ops = &nfs41_state_renewal_ops,
7044};
7045#endif
7046
97dc1359
TM		 7047const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7048 [0] = &nfs_v4_0_minor_ops,
7049#if defined(CONFIG_NFS_V4_1)
7050 [1] = &nfs_v4_1_minor_ops,
7051#endif
42c2c424
SD		 7052#if defined(CONFIG_NFS_V4_2)
7053 [2] = &nfs_v4_2_minor_ops,
7054#endif
97dc1359
TM		 7055};
7056
73a79706
BS		 7057const struct inode_operations nfs4_dir_inode_operations = {
7058 .create = nfs_create,
7059 .lookup = nfs_lookup,
7060 .atomic_open = nfs_atomic_open,
7061 .link = nfs_link,
7062 .unlink = nfs_unlink,
7063 .symlink = nfs_symlink,
7064 .mkdir = nfs_mkdir,
7065 .rmdir = nfs_rmdir,
7066 .mknod = nfs_mknod,
7067 .rename = nfs_rename,
7068 .permission = nfs_permission,
7069 .getattr = nfs_getattr,
7070 .setattr = nfs_setattr,
7071 .getxattr = generic_getxattr,
7072 .setxattr = generic_setxattr,
7073 .listxattr = generic_listxattr,
7074 .removexattr = generic_removexattr,
7075};
7076
92e1d5be 7077static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7078 .permission = nfs_permission,
7079 .getattr = nfs_getattr,
7080 .setattr = nfs_setattr,
64c2ce8b
AK		 7081 .getxattr = generic_getxattr,
7082 .setxattr = generic_setxattr,
7083 .listxattr = generic_listxattr,
7084 .removexattr = generic_removexattr,
6b3b5496
BF		 7085};
7086
509de811 7087const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7088 .version = 4, /* protocol version */
7089 .dentry_ops = &nfs4_dentry_operations,
7090 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7091 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7092 .file_ops = &nfs4_file_operations,
1da177e4 7093 .getroot = nfs4_proc_get_root,
281cad46 7094 .submount = nfs4_submount,
ff9099f2 7095 .try_mount = nfs4_try_mount,
1da177e4
LT		 7096 .getattr = nfs4_proc_getattr,
7097 .setattr = nfs4_proc_setattr,
7098 .lookup = nfs4_proc_lookup,
7099 .access = nfs4_proc_access,
7100 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7101 .create = nfs4_proc_create,
7102 .remove = nfs4_proc_remove,
7103 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7104 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7105 .unlink_done = nfs4_proc_unlink_done,
7106 .rename = nfs4_proc_rename,
d3d4152a 7107 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7108 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7109 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7110 .link = nfs4_proc_link,
7111 .symlink = nfs4_proc_symlink,
7112 .mkdir = nfs4_proc_mkdir,
7113 .rmdir = nfs4_proc_remove,
7114 .readdir = nfs4_proc_readdir,
7115 .mknod = nfs4_proc_mknod,
7116 .statfs = nfs4_proc_statfs,
7117 .fsinfo = nfs4_proc_fsinfo,
7118 .pathconf = nfs4_proc_pathconf,
e9326dca 7119 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7120 .decode_dirent = nfs4_decode_dirent,
7121 .read_setup = nfs4_proc_read_setup,
1abb5088 7122 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7123 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7124 .read_done = nfs4_read_done,
1da177e4 7125 .write_setup = nfs4_proc_write_setup,
57208fa7 7126 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7127 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7128 .write_done = nfs4_write_done,
1da177e4 7129 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7130 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7131 .commit_done = nfs4_commit_done,
1da177e4 7132 .lock = nfs4_proc_lock,
e50a1c2e 7133 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7134 .close_context = nfs4_close_context,
2b484297 7135 .open_context = nfs4_atomic_open,
011e2a7f 7136 .have_delegation = nfs4_have_delegation,
57ec14c5 7137 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7138 .alloc_client = nfs4_alloc_client,
45a52a02 7139 .init_client = nfs4_init_client,
cdb7eced 7140 .free_client = nfs4_free_client,
1179acc6
BS		 7141 .create_server = nfs4_create_server,
7142 .clone_server = nfs_clone_server,
1da177e4
LT		 7143};
7144
64c2ce8b
AK		 7145static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7146 .prefix = XATTR_NAME_NFSV4_ACL,
7147 .list = nfs4_xattr_list_nfs4_acl,
7148 .get = nfs4_xattr_get_nfs4_acl,
7149 .set = nfs4_xattr_set_nfs4_acl,
7150};
7151
7152const struct xattr_handler *nfs4_xattr_handlers[] = {
7153 &nfs4_xattr_nfs4_acl_handler,
7154 NULL
7155};
7156
1da177e4
LT		 7157/*
7158 * Local variables:
7159 * c-basic-offset: 8
7160 * End:
7161 */
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