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NFS: Add label lifecycle management
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
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;
14c43f76
DQ		 836
837 p->f_label = nfs4_label_alloc(server, gfp_mask);
838 if (IS_ERR(p->f_label))
839 goto err_free_p;
840
8535b2be 841 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 842 if (p->o_arg.seqid == NULL)
14c43f76 843 goto err_free_label;
82a2c1b7
AV		 844 nfs_sb_active(dentry->d_sb);
845 p->dentry = dget(dentry);
e56e0b78
TM		 846 p->dir = parent;
847 p->owner = sp;
848 atomic_inc(&sp->so_count);
dc0b027d
TM		 849 p->o_arg.open_flags = flags;
850 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 851 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
852 * will return permission denied for all bits until close */
853 if (!(flags & O_EXCL)) {
854 /* ask server to check for all possible rights as results
855 * are cached */
856 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
857 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 858 }
7539bbab 859 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 860 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
861 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 862 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 863 p->o_arg.server = server;
864 p->o_arg.bitmask = server->attr_bitmask;
1549210f 865 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 866 p->o_arg.label = label;
49f9a0fa
TM		 867 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
868 switch (p->o_arg.claim) {
4a1c0893
TM		 869 case NFS4_OPEN_CLAIM_NULL:
870 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
871 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
872 p->o_arg.fh = NFS_FH(dir);
873 break;
874 case NFS4_OPEN_CLAIM_PREVIOUS:
875 case NFS4_OPEN_CLAIM_FH:
876 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
877 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
878 p->o_arg.fh = NFS_FH(dentry->d_inode);
879 }
536e43d1 880 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 881 __be32 verf[2];
d77d76ff 882
e56e0b78
TM		 883 p->o_arg.u.attrs = &p->attrs;
884 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 885
886 verf[0] = jiffies;
887 verf[1] = current->pid;
888 memcpy(p->o_arg.u.verifier.data, verf,
889 sizeof(p->o_arg.u.verifier.data));
e56e0b78 890 }
cdd4e68b
TM		 891 p->c_arg.fh = &p->o_res.fh;
892 p->c_arg.stateid = &p->o_res.stateid;
893 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 894 nfs4_init_opendata_res(p);
c6d00e63 895 kref_init(&p->kref);
e56e0b78 896 return p;
14c43f76
DQ		 897
898err_free_label:
899 nfs4_label_free(p->f_label);
900err_free_p:
e56e0b78
TM		 901 kfree(p);
902err:
903 dput(parent);
904 return NULL;
905}
906
c6d00e63 907static void nfs4_opendata_free(struct kref *kref)
e56e0b78 908{
c6d00e63
TM		 909 struct nfs4_opendata *p = container_of(kref,
910 struct nfs4_opendata, kref);
82a2c1b7 911 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 912
913 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 914 if (p->state != NULL)
915 nfs4_put_open_state(p->state);
c6d00e63 916 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 917
918 nfs4_label_free(p->f_label);
919
c6d00e63 920 dput(p->dir);
82a2c1b7
AV		 921 dput(p->dentry);
922 nfs_sb_deactive(sb);
6926afd1 923 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 924 kfree(p);
925}
926
927static void nfs4_opendata_put(struct nfs4_opendata *p)
928{
929 if (p != NULL)
930 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 931}
932
06f814a3
TM		 933static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
934{
06f814a3
TM		 935 int ret;
936
06f814a3 937 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 938 return ret;
939}
940
dc0b027d 941static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 942{
943 int ret = 0;
dc0b027d 944
536e43d1 945 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 946 goto out;
947 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 948 case FMODE_READ:
88069f77
TM		 949 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
950 && state->n_rdonly != 0;
6ee41268
TM		 951 break;
952 case FMODE_WRITE:
88069f77
TM		 953 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
954 && state->n_wronly != 0;
6ee41268
TM		 955 break;
956 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 957 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
958 && state->n_rdwr != 0;
6ee41268 959 }
dc0b027d 960out:
6ee41268
TM		 961 return ret;
962}
963
dc0b027d 964static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 965{
652f89f6
TM		 966 if (delegation == NULL)
967 return 0;
dc0b027d 968 if ((delegation->type & fmode) != fmode)
aac00a8d 969 return 0;
15c831bf 970 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 971 return 0;
d25be546
TM		 972 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
973 return 0;
b7391f44 974 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 975 return 1;
976}
977
dc0b027d 978static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 979{
dc0b027d 980 switch (fmode) {
e7616923
TM		 981 case FMODE_WRITE:
982 state->n_wronly++;
983 break;
984 case FMODE_READ:
985 state->n_rdonly++;
986 break;
987 case FMODE_READ|FMODE_WRITE:
988 state->n_rdwr++;
989 }
dc0b027d 990 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 991}
992
dc0b027d 993static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 994{
995 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 996 nfs4_stateid_copy(&state->stateid, stateid);
997 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 998 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 999 switch (fmode) {
003707c7
TM		 1000 case FMODE_READ:
1001 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1002 break;
1003 case FMODE_WRITE:
1004 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1005 break;
1006 case FMODE_READ|FMODE_WRITE:
1007 set_bit(NFS_O_RDWR_STATE, &state->flags);
1008 }
e7616923
TM		 1009}
1010
dc0b027d 1011static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1012{
8bda4e4c 1013 write_seqlock(&state->seqlock);
dc0b027d 1014 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1015 write_sequnlock(&state->seqlock);
003707c7
TM		 1016}
1017
dc0b027d 1018static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1019{
8bda4e4c
TM		 1020 /*
1021 * Protect the call to nfs4_state_set_mode_locked and
1022 * serialise the stateid update
1023 */
1024 write_seqlock(&state->seqlock);
003707c7 1025 if (deleg_stateid != NULL) {
f597c537 1026 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1027 set_bit(NFS_DELEGATED_STATE, &state->flags);
1028 }
1029 if (open_stateid != NULL)
dc0b027d 1030 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1031 write_sequnlock(&state->seqlock);
1032 spin_lock(&state->owner->so_lock);
dc0b027d 1033 update_open_stateflags(state, fmode);
ec073428 1034 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1035}
1036
dc0b027d 1037static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1038{
1039 struct nfs_inode *nfsi = NFS_I(state->inode);
1040 struct nfs_delegation *deleg_cur;
1041 int ret = 0;
1042
dc0b027d 1043 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1044
1045 rcu_read_lock();
1046 deleg_cur = rcu_dereference(nfsi->delegation);
1047 if (deleg_cur == NULL)
1048 goto no_delegation;
1049
1050 spin_lock(&deleg_cur->lock);
1051 if (nfsi->delegation != deleg_cur ||
d25be546 1052 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1053 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1054 goto no_delegation_unlock;
1055
1056 if (delegation == NULL)
1057 delegation = &deleg_cur->stateid;
f597c537 1058 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1059 goto no_delegation_unlock;
1060
b7391f44 1061 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1062 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1063 ret = 1;
1064no_delegation_unlock:
1065 spin_unlock(&deleg_cur->lock);
1066no_delegation:
1067 rcu_read_unlock();
1068
1069 if (!ret && open_stateid != NULL) {
dc0b027d 1070 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1071 ret = 1;
1072 }
1073
1074 return ret;
1075}
1076
1077
dc0b027d 1078static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1079{
1080 struct nfs_delegation *delegation;
1081
1082 rcu_read_lock();
1083 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1084 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1085 rcu_read_unlock();
1086 return;
1087 }
1088 rcu_read_unlock();
57ec14c5 1089 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1090}
1091
6ee41268 1092static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1093{
1094 struct nfs4_state *state = opendata->state;
1095 struct nfs_inode *nfsi = NFS_I(state->inode);
1096 struct nfs_delegation *delegation;
536e43d1 1097 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1098 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1099 nfs4_stateid stateid;
1100 int ret = -EAGAIN;
1101
aac00a8d 1102 for (;;) {
dc0b027d 1103 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1104 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1105 if (can_open_cached(state, fmode, open_mode)) {
1106 update_open_stateflags(state, fmode);
6ee41268 1107 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1108 goto out_return_state;
1109 }
1110 spin_unlock(&state->owner->so_lock);
1111 }
34310430
TM		 1112 rcu_read_lock();
1113 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1114 if (!can_open_delegated(delegation, fmode)) {
34310430 1115 rcu_read_unlock();
aac00a8d 1116 break;
34310430 1117 }
aac00a8d 1118 /* Save the delegation */
f597c537 1119 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1120 rcu_read_unlock();
fa332941 1121 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1122 if (!opendata->is_recover) {
1123 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1124 if (ret != 0)
1125 goto out;
1126 }
aac00a8d 1127 ret = -EAGAIN;
34310430
TM		 1128
1129 /* Try to update the stateid using the delegation */
dc0b027d 1130 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1131 goto out_return_state;
aac00a8d 1132 }
aac00a8d
TM		 1133out:
1134 return ERR_PTR(ret);
1135out_return_state:
1136 atomic_inc(&state->count);
1137 return state;
1138}
1139
e23008ec
AA		 1140static void
1141nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1142{
1143 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1144 struct nfs_delegation *delegation;
1145 int delegation_flags = 0;
1146
1147 rcu_read_lock();
1148 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1149 if (delegation)
1150 delegation_flags = delegation->flags;
1151 rcu_read_unlock();
1152 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1153 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1154 "returning a delegation for "
1155 "OPEN(CLAIM_DELEGATE_CUR)\n",
1156 clp->cl_hostname);
1157 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1158 nfs_inode_set_delegation(state->inode,
1159 data->owner->so_cred,
1160 &data->o_res);
1161 else
1162 nfs_inode_reclaim_delegation(state->inode,
1163 data->owner->so_cred,
1164 &data->o_res);
1165}
1166
1167/*
1168 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1169 * and update the nfs4_state.
1170 */
1171static struct nfs4_state *
1172_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1173{
1174 struct inode *inode = data->state->inode;
1175 struct nfs4_state *state = data->state;
1176 int ret;
1177
1178 if (!data->rpc_done) {
1179 ret = data->rpc_status;
1180 goto err;
1181 }
1182
1183 ret = -ESTALE;
1184 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1185 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1186 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1187 goto err;
1188
1189 ret = -ENOMEM;
1190 state = nfs4_get_open_state(inode, data->owner);
1191 if (state == NULL)
1192 goto err;
1193
1194 ret = nfs_refresh_inode(inode, &data->f_attr);
1195 if (ret)
1196 goto err;
1197
1198 if (data->o_res.delegation_type != 0)
1199 nfs4_opendata_check_deleg(data, state);
1200 update_open_stateid(state, &data->o_res.stateid, NULL,
1201 data->o_arg.fmode);
1202
1203 return state;
1204err:
1205 return ERR_PTR(ret);
1206
1207}
1208
1209static struct nfs4_state *
1210_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1211{
1212 struct inode *inode;
1213 struct nfs4_state *state = NULL;
1b370bc2 1214 int ret;
24ac23ab 1215
aac00a8d 1216 if (!data->rpc_done) {
6ee41268 1217 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1218 goto out;
1219 }
1220
1b370bc2 1221 ret = -EAGAIN;
24ac23ab 1222 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1223 goto err;
1775fd3e 1224 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1225 ret = PTR_ERR(inode);
03f28e3a 1226 if (IS_ERR(inode))
1b370bc2
TM		 1227 goto err;
1228 ret = -ENOMEM;
24ac23ab
TM		 1229 state = nfs4_get_open_state(inode, data->owner);
1230 if (state == NULL)
1b370bc2 1231 goto err_put_inode;
e23008ec
AA		 1232 if (data->o_res.delegation_type != 0)
1233 nfs4_opendata_check_deleg(data, state);
34310430 1234 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1235 data->o_arg.fmode);
24ac23ab 1236 iput(inode);
aac00a8d 1237out:
7aa262b5 1238 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1239 return state;
1b370bc2
TM		 1240err_put_inode:
1241 iput(inode);
1242err:
1243 return ERR_PTR(ret);
24ac23ab
TM		 1244}
1245
e23008ec
AA		 1246static struct nfs4_state *
1247nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1248{
1249 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1250 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1251 return _nfs4_opendata_to_nfs4_state(data);
1252}
1253
864472e9
TM		 1254static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1255{
1256 struct nfs_inode *nfsi = NFS_I(state->inode);
1257 struct nfs_open_context *ctx;
1258
1259 spin_lock(&state->inode->i_lock);
1260 list_for_each_entry(ctx, &nfsi->open_files, list) {
1261 if (ctx->state != state)
1262 continue;
1263 get_nfs_open_context(ctx);
1264 spin_unlock(&state->inode->i_lock);
1265 return ctx;
1266 }
1267 spin_unlock(&state->inode->i_lock);
1268 return ERR_PTR(-ENOENT);
1269}
1270
4a1c0893
TM		 1271static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1272 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1273{
1274 struct nfs4_opendata *opendata;
1275
4a1c0893 1276 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1277 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1278 if (opendata == NULL)
1279 return ERR_PTR(-ENOMEM);
1280 opendata->state = state;
1281 atomic_inc(&state->count);
1282 return opendata;
1283}
1284
dc0b027d 1285static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1286{
2ced46c2 1287 struct nfs4_state *newstate;
864472e9
TM		 1288 int ret;
1289
dc0b027d
TM		 1290 opendata->o_arg.open_flags = 0;
1291 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1292 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1293 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1294 nfs4_init_opendata_res(opendata);
b257957e 1295 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1296 if (ret != 0)
1297 return ret;
2ced46c2 1298 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1299 if (IS_ERR(newstate))
1300 return PTR_ERR(newstate);
643168c2 1301 nfs4_close_state(newstate, fmode);
2ced46c2 1302 *res = newstate;
864472e9
TM		 1303 return 0;
1304}
1305
1306static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1307{
864472e9 1308 struct nfs4_state *newstate;
864472e9
TM		 1309 int ret;
1310
1311 /* memory barrier prior to reading state->n_* */
2ced46c2 1312 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1313 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1314 smp_rmb();
1315 if (state->n_rdwr != 0) {
b0ed9dbc 1316 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1317 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1318 if (ret != 0)
1319 return ret;
2ced46c2
TM		 1320 if (newstate != state)
1321 return -ESTALE;
864472e9
TM		 1322 }
1323 if (state->n_wronly != 0) {
b0ed9dbc 1324 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1325 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1326 if (ret != 0)
1327 return ret;
2ced46c2
TM		 1328 if (newstate != state)
1329 return -ESTALE;
864472e9
TM		 1330 }
1331 if (state->n_rdonly != 0) {
b0ed9dbc 1332 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1333 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1334 if (ret != 0)
1335 return ret;
2ced46c2
TM		 1336 if (newstate != state)
1337 return -ESTALE;
864472e9 1338 }
1ac7e2fd
TM		 1339 /*
1340 * We may have performed cached opens for all three recoveries.
1341 * Check if we need to update the current stateid.
1342 */
1343 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1344 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1345 write_seqlock(&state->seqlock);
1ac7e2fd 1346 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1347 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1348 write_sequnlock(&state->seqlock);
1ac7e2fd 1349 }
864472e9
TM		 1350 return 0;
1351}
1352
1da177e4
LT		 1353/*
1354 * OPEN_RECLAIM:
1355 * reclaim state on the server after a reboot.
1da177e4 1356 */
539cd03a 1357static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1358{
1ac7e2fd 1359 struct nfs_delegation *delegation;
864472e9 1360 struct nfs4_opendata *opendata;
dc0b027d 1361 fmode_t delegation_type = 0;
1da177e4
LT		 1362 int status;
1363
4a1c0893
TM		 1364 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1365 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1366 if (IS_ERR(opendata))
1367 return PTR_ERR(opendata);
1ac7e2fd
TM		 1368 rcu_read_lock();
1369 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1370 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1371 delegation_type = delegation->type;
1ac7e2fd 1372 rcu_read_unlock();
864472e9
TM		 1373 opendata->o_arg.u.delegation_type = delegation_type;
1374 status = nfs4_open_recover(opendata, state);
c6d00e63 1375 nfs4_opendata_put(opendata);
1da177e4
LT		 1376 return status;
1377}
1378
539cd03a 1379static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1380{
1381 struct nfs_server *server = NFS_SERVER(state->inode);
1382 struct nfs4_exception exception = { };
1383 int err;
1384 do {
539cd03a 1385 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1386 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1387 continue;
168667c4 1388 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1389 break;
1390 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1391 } while (exception.retry);
1392 return err;
1393}
1394
864472e9
TM		 1395static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1396{
1397 struct nfs_open_context *ctx;
1398 int ret;
1399
1400 ctx = nfs4_state_find_open_context(state);
1401 if (IS_ERR(ctx))
91876b13 1402 return -EAGAIN;
539cd03a 1403 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1404 put_nfs_open_context(ctx);
1405 return ret;
1406}
1407
db4f2e63 1408static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1409{
be76b5b6
TM		 1410 switch (err) {
1411 default:
1412 printk(KERN_ERR "NFS: %s: unhandled error "
1413 "%d.\n", __func__, err);
1414 case 0:
1415 case -ENOENT:
1416 case -ESTALE:
1417 break;
1418 case -NFS4ERR_BADSESSION:
1419 case -NFS4ERR_BADSLOT:
1420 case -NFS4ERR_BAD_HIGH_SLOT:
1421 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1422 case -NFS4ERR_DEADSESSION:
1423 set_bit(NFS_DELEGATED_STATE, &state->flags);
1424 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1425 return -EAGAIN;
1426 case -NFS4ERR_STALE_CLIENTID:
1427 case -NFS4ERR_STALE_STATEID:
1428 set_bit(NFS_DELEGATED_STATE, &state->flags);
1429 case -NFS4ERR_EXPIRED:
1430 /* Don't recall a delegation if it was lost */
1431 nfs4_schedule_lease_recovery(server->nfs_client);
1432 return -EAGAIN;
1433 case -NFS4ERR_DELEG_REVOKED:
1434 case -NFS4ERR_ADMIN_REVOKED:
1435 case -NFS4ERR_BAD_STATEID:
db4f2e63 1436 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1437 nfs_inode_find_state_and_recover(state->inode,
1438 stateid);
1439 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1440 return 0;
1441 case -NFS4ERR_DELAY:
1442 case -NFS4ERR_GRACE:
1443 set_bit(NFS_DELEGATED_STATE, &state->flags);
1444 ssleep(1);
1445 return -EAGAIN;
db4f2e63
TM		 1446 case -ENOMEM:
1447 case -NFS4ERR_DENIED:
1448 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1449 return 0;
be76b5b6 1450 }
1da177e4
LT		 1451 return err;
1452}
1453
db4f2e63
TM		 1454int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1455{
1456 struct nfs_server *server = NFS_SERVER(state->inode);
1457 struct nfs4_opendata *opendata;
1458 int err;
1459
1460 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1461 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1462 if (IS_ERR(opendata))
1463 return PTR_ERR(opendata);
1464 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1465 err = nfs4_open_recover(opendata, state);
1466 nfs4_opendata_put(opendata);
1467 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1468}
1469
cdd4e68b
TM		 1470static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1471{
1472 struct nfs4_opendata *data = calldata;
1473
1474 data->rpc_status = task->tk_status;
26e976a8 1475 if (data->rpc_status == 0) {
f597c537 1476 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1477 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1478 renew_lease(data->o_res.server, data->timestamp);
3e309914 1479 data->rpc_done = 1;
26e976a8 1480 }
cdd4e68b
TM		 1481}
1482
1483static void nfs4_open_confirm_release(void *calldata)
1484{
1485 struct nfs4_opendata *data = calldata;
1486 struct nfs4_state *state = NULL;
1487
1488 /* If this request hasn't been cancelled, do nothing */
1489 if (data->cancelled == 0)
1490 goto out_free;
1491 /* In case of error, no cleanup! */
3e309914 1492 if (!data->rpc_done)
cdd4e68b 1493 goto out_free;
cdd4e68b 1494 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1495 if (!IS_ERR(state))
643168c2 1496 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1497out_free:
c6d00e63 1498 nfs4_opendata_put(data);
cdd4e68b
TM		 1499}
1500
1501static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1502 .rpc_call_done = nfs4_open_confirm_done,
1503 .rpc_release = nfs4_open_confirm_release,
1504};
1505
1506/*
1507 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1508 */
1509static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1510{
1511 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1512 struct rpc_task *task;
5138fde0
TM		 1513 struct rpc_message msg = {
1514 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1515 .rpc_argp = &data->c_arg,
1516 .rpc_resp = &data->c_res,
1517 .rpc_cred = data->owner->so_cred,
1518 };
c970aa85
TM		 1519 struct rpc_task_setup task_setup_data = {
1520 .rpc_client = server->client,
5138fde0 1521 .rpc_message = &msg,
c970aa85
TM		 1522 .callback_ops = &nfs4_open_confirm_ops,
1523 .callback_data = data,
101070ca 1524 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1525 .flags = RPC_TASK_ASYNC,
1526 };
1da177e4
LT		 1527 int status;
1528
c6d00e63 1529 kref_get(&data->kref);
3e309914
TM		 1530 data->rpc_done = 0;
1531 data->rpc_status = 0;
5138fde0 1532 data->timestamp = jiffies;
c970aa85 1533 task = rpc_run_task(&task_setup_data);
7a1218a2 1534 if (IS_ERR(task))
cdd4e68b 1535 return PTR_ERR(task);
cdd4e68b
TM		 1536 status = nfs4_wait_for_completion_rpc_task(task);
1537 if (status != 0) {
1538 data->cancelled = 1;
1539 smp_wmb();
1540 } else
1541 status = data->rpc_status;
e6b3c4db 1542 rpc_put_task(task);
1da177e4
LT		 1543 return status;
1544}
1545
24ac23ab 1546static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1547{
24ac23ab
TM		 1548 struct nfs4_opendata *data = calldata;
1549 struct nfs4_state_owner *sp = data->owner;
549b19cc 1550 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1551
24ac23ab 1552 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1553 goto out_wait;
aac00a8d
TM		 1554 /*
1555 * Check if we still need to send an OPEN call, or if we can use
1556 * a delegation instead.
1557 */
1558 if (data->state != NULL) {
1559 struct nfs_delegation *delegation;
1560
dc0b027d 1561 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1562 goto out_no_action;
aac00a8d
TM		 1563 rcu_read_lock();
1564 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1565 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1566 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1567 can_open_delegated(delegation, data->o_arg.fmode))
1568 goto unlock_no_action;
aac00a8d
TM		 1569 rcu_read_unlock();
1570 }
95b72eb0 1571 /* Update client id. */
549b19cc 1572 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1573 switch (data->o_arg.claim) {
1574 case NFS4_OPEN_CLAIM_PREVIOUS:
1575 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1576 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1577 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1578 case NFS4_OPEN_CLAIM_FH:
1579 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1580 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1581 }
26e976a8 1582 data->timestamp = jiffies;
035168ab 1583 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1584 &data->o_arg.seq_args,
2240a9e2
TM		 1585 &data->o_res.seq_res,
1586 task) != 0)
1587 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1588
1589 /* Set the create mode (note dependency on the session type) */
1590 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1591 if (data->o_arg.open_flags & O_EXCL) {
1592 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1593 if (nfs4_has_persistent_session(clp))
1594 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1595 else if (clp->cl_mvops->minor_version > 0)
1596 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1597 }
6ee41268 1598 return;
652f89f6
TM		 1599unlock_no_action:
1600 rcu_read_unlock();
6ee41268
TM		 1601out_no_action:
1602 task->tk_action = NULL;
c8da19b9 1603out_wait:
b75ad4cd 1604 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1605}
1606
24ac23ab
TM		 1607static void nfs4_open_done(struct rpc_task *task, void *calldata)
1608{
1609 struct nfs4_opendata *data = calldata;
1da177e4 1610
24ac23ab 1611 data->rpc_status = task->tk_status;
d898528c 1612
14516c3a
TM		 1613 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1614 return;
d898528c 1615
24ac23ab 1616 if (task->tk_status == 0) {
807d66d8
TM		 1617 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1618 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1619 case S_IFREG:
1620 break;
1621 case S_IFLNK:
24ac23ab 1622 data->rpc_status = -ELOOP;
6f926b5b
TM		 1623 break;
1624 case S_IFDIR:
24ac23ab 1625 data->rpc_status = -EISDIR;
6f926b5b
TM		 1626 break;
1627 default:
24ac23ab 1628 data->rpc_status = -ENOTDIR;
807d66d8 1629 }
6f926b5b 1630 }
26e976a8 1631 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1632 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1633 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1634 }
3e309914 1635 data->rpc_done = 1;
24ac23ab 1636}
6f926b5b 1637
24ac23ab
TM		 1638static void nfs4_open_release(void *calldata)
1639{
1640 struct nfs4_opendata *data = calldata;
1641 struct nfs4_state *state = NULL;
1642
1643 /* If this request hasn't been cancelled, do nothing */
1644 if (data->cancelled == 0)
1645 goto out_free;
1646 /* In case of error, no cleanup! */
3e309914 1647 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1648 goto out_free;
1649 /* In case we need an open_confirm, no cleanup! */
1650 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1651 goto out_free;
24ac23ab 1652 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1653 if (!IS_ERR(state))
643168c2 1654 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1655out_free:
c6d00e63 1656 nfs4_opendata_put(data);
24ac23ab
TM		 1657}
1658
1659static const struct rpc_call_ops nfs4_open_ops = {
1660 .rpc_call_prepare = nfs4_open_prepare,
1661 .rpc_call_done = nfs4_open_done,
1662 .rpc_release = nfs4_open_release,
1663};
1664
b257957e 1665static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1666{
1667 struct inode *dir = data->dir->d_inode;
1668 struct nfs_server *server = NFS_SERVER(dir);
1669 struct nfs_openargs *o_arg = &data->o_arg;
1670 struct nfs_openres *o_res = &data->o_res;
1671 struct rpc_task *task;
5138fde0
TM		 1672 struct rpc_message msg = {
1673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1674 .rpc_argp = o_arg,
1675 .rpc_resp = o_res,
1676 .rpc_cred = data->owner->so_cred,
1677 };
c970aa85
TM		 1678 struct rpc_task_setup task_setup_data = {
1679 .rpc_client = server->client,
5138fde0 1680 .rpc_message = &msg,
c970aa85
TM		 1681 .callback_ops = &nfs4_open_ops,
1682 .callback_data = data,
101070ca 1683 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1684 .flags = RPC_TASK_ASYNC,
1685 };
24ac23ab
TM		 1686 int status;
1687
9d12b216 1688 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1689 kref_get(&data->kref);
3e309914
TM		 1690 data->rpc_done = 0;
1691 data->rpc_status = 0;
2ced46c2 1692 data->cancelled = 0;
bdeca1b7
TM		 1693 data->is_recover = 0;
1694 if (isrecover) {
8fe72bac 1695 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1696 data->is_recover = 1;
1697 }
c970aa85 1698 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1699 if (IS_ERR(task))
1700 return PTR_ERR(task);
1701 status = nfs4_wait_for_completion_rpc_task(task);
1702 if (status != 0) {
1703 data->cancelled = 1;
1704 smp_wmb();
1705 } else
1706 status = data->rpc_status;
1707 rpc_put_task(task);
1708
1709 return status;
1710}
1711
1712static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1713{
1714 struct inode *dir = data->dir->d_inode;
1715 struct nfs_openres *o_res = &data->o_res;
1716 int status;
1717
1718 status = nfs4_run_open_task(data, 1);
1719 if (status != 0 || !data->rpc_done)
1720 return status;
1721
6926afd1
TM		 1722 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1723
b257957e
AB		 1724 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1725 status = _nfs4_proc_open_confirm(data);
1726 if (status != 0)
1727 return status;
1728 }
1729
1730 return status;
1731}
1732
6168f62c
WAA		 1733static int nfs4_opendata_access(struct rpc_cred *cred,
1734 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1735 struct nfs4_state *state, fmode_t fmode,
1736 int openflags)
6168f62c
WAA		 1737{
1738 struct nfs_access_entry cache;
1739 u32 mask;
1740
1741 /* access call failed or for some reason the server doesn't
1742 * support any access modes -- defer access call until later */
1743 if (opendata->o_res.access_supported == 0)
1744 return 0;
1745
1746 mask = 0;
bbd3a8ee 1747 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1748 * write mode bits, but POSIX allows the creating process to write.
1749 * use openflags to check for exec, because fmode won't
1750 * always have FMODE_EXEC set when file open for exec. */
1751 if (openflags & __FMODE_EXEC) {
1752 /* ONLY check for exec rights */
1753 mask = MAY_EXEC;
1754 } else if (fmode & FMODE_READ)
1755 mask = MAY_READ;
6168f62c
WAA		 1756
1757 cache.cred = cred;
1758 cache.jiffies = jiffies;
1759 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1760 nfs_access_add_cache(state->inode, &cache);
1761
bbd3a8ee 1762 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1763 return 0;
1764
1765 /* even though OPEN succeeded, access is denied. Close the file */
1766 nfs4_close_state(state, fmode);
998f40b5 1767 return -EACCES;
6168f62c
WAA		 1768}
1769
b257957e
AB		 1770/*
1771 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1772 */
1773static int _nfs4_proc_open(struct nfs4_opendata *data)
1774{
1775 struct inode *dir = data->dir->d_inode;
1776 struct nfs_server *server = NFS_SERVER(dir);
1777 struct nfs_openargs *o_arg = &data->o_arg;
1778 struct nfs_openres *o_res = &data->o_res;
1779 int status;
1780
1781 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1782 if (!data->rpc_done)
1783 return status;
1784 if (status != 0) {
1785 if (status == -NFS4ERR_BADNAME &&
1786 !(o_arg->open_flags & O_CREAT))
1787 return -ENOENT;
24ac23ab 1788 return status;
08ef7bd3 1789 }
24ac23ab 1790
6926afd1
TM		 1791 nfs_fattr_map_and_free_names(server, &data->f_attr);
1792
90ff0c54 1793 if (o_arg->open_flags & O_CREAT)
56ae19f3 1794 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1795 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1796 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1797 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1798 status = _nfs4_proc_open_confirm(data);
1da177e4 1799 if (status != 0)
24ac23ab 1800 return status;
1da177e4
LT		 1801 }
1802 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1803 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1804 return 0;
1da177e4
LT		 1805}
1806
d83217c1
AA		 1807static int nfs4_recover_expired_lease(struct nfs_server *server)
1808{
1809 return nfs4_client_recover_expired_lease(server->nfs_client);
1810}
1811
1da177e4
LT		 1812/*
1813 * OPEN_EXPIRED:
1814 * reclaim state on the server after a network partition.
1815 * Assumes caller holds the appropriate lock
1816 */
539cd03a 1817static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1818{
e56e0b78 1819 struct nfs4_opendata *opendata;
864472e9 1820 int ret;
1da177e4 1821
4a1c0893 1822 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1823 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1824 if (IS_ERR(opendata))
1825 return PTR_ERR(opendata);
864472e9 1826 ret = nfs4_open_recover(opendata, state);
35d05778 1827 if (ret == -ESTALE)
3d4ff43d 1828 d_drop(ctx->dentry);
c6d00e63 1829 nfs4_opendata_put(opendata);
864472e9 1830 return ret;
1da177e4
LT		 1831}
1832
a9ed2e25 1833static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1834{
539cd03a 1835 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1836 struct nfs4_exception exception = { };
1837 int err;
1838
1839 do {
539cd03a 1840 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1841 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1842 continue;
a9ed2e25
TM		 1843 switch (err) {
1844 default:
1845 goto out;
1846 case -NFS4ERR_GRACE:
1847 case -NFS4ERR_DELAY:
1848 nfs4_handle_exception(server, err, &exception);
1849 err = 0;
1850 }
202b50dc 1851 } while (exception.retry);
a9ed2e25 1852out:
202b50dc
TM		 1853 return err;
1854}
1855
1da177e4
LT		 1856static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1857{
1da177e4 1858 struct nfs_open_context *ctx;
864472e9 1859 int ret;
1da177e4 1860
864472e9
TM		 1861 ctx = nfs4_state_find_open_context(state);
1862 if (IS_ERR(ctx))
91876b13 1863 return -EAGAIN;
539cd03a 1864 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1865 put_nfs_open_context(ctx);
1866 return ret;
1da177e4
LT		 1867}
1868
f062eb6c 1869#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1870static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1871{
f062eb6c 1872 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1873 nfs4_stateid *stateid = &state->stateid;
1874 int status;
1875
1876 /* If a state reset has been done, test_stateid is unneeded */
1877 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1878 return;
1879
1880 status = nfs41_test_stateid(server, stateid);
1881 if (status != NFS_OK) {
1882 /* Free the stateid unless the server explicitly
1883 * informs us the stateid is unrecognized. */
1884 if (status != -NFS4ERR_BAD_STATEID)
1885 nfs41_free_stateid(server, stateid);
6938867e 1886 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1887
6938867e
BS		 1888 write_seqlock(&state->seqlock);
1889 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1890 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1891 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1892 }
1893}
1894
1895/**
1896 * nfs41_check_open_stateid - possibly free an open stateid
1897 *
1898 * @state: NFSv4 state for an inode
1899 *
1900 * Returns NFS_OK if recovery for this stateid is now finished.
1901 * Otherwise a negative NFS4ERR value is returned.
1902 */
1903static int nfs41_check_open_stateid(struct nfs4_state *state)
1904{
1905 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1906 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1907 int status;
1908
1909 /* If a state reset has been done, test_stateid is unneeded */
1910 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1911 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1912 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1913 return -NFS4ERR_BAD_STATEID;
1914
1915 status = nfs41_test_stateid(server, stateid);
1916 if (status != NFS_OK) {
1917 /* Free the stateid unless the server explicitly
1918 * informs us the stateid is unrecognized. */
1919 if (status != -NFS4ERR_BAD_STATEID)
1920 nfs41_free_stateid(server, stateid);
1921
1922 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1923 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1924 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 1925 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 1926 }
1927 return status;
1928}
1929
1930static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1931{
eb64cf96 1932 int status;
b01dd1d8 1933
3e60ffdd
CL		 1934 nfs41_clear_delegation_stateid(state);
1935 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1936 if (status != NFS_OK)
1937 status = nfs4_open_expired(sp, state);
1938 return status;
f062eb6c
BS		 1939}
1940#endif
1941
aa53ed54
JL		 1942/*
1943 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1944 * fields corresponding to attributes that were used to store the verifier.
1945 * Make sure we clobber those fields in the later setattr call
1946 */
1947static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1948{
1949 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1950 !(sattr->ia_valid & ATTR_ATIME_SET))
1951 sattr->ia_valid |= ATTR_ATIME;
1952
1953 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1954 !(sattr->ia_valid & ATTR_MTIME_SET))
1955 sattr->ia_valid |= ATTR_MTIME;
1956}
1957
c21443c2
TM		 1958static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1959 fmode_t fmode,
1960 int flags,
1961 struct nfs4_state **res)
1962{
1963 struct nfs4_state_owner *sp = opendata->owner;
1964 struct nfs_server *server = sp->so_server;
1965 struct nfs4_state *state;
1966 unsigned int seq;
1967 int ret;
1968
1969 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1970
1971 ret = _nfs4_proc_open(opendata);
1972 if (ret != 0)
1973 goto out;
1974
1975 state = nfs4_opendata_to_nfs4_state(opendata);
1976 ret = PTR_ERR(state);
1977 if (IS_ERR(state))
1978 goto out;
1979 if (server->caps & NFS_CAP_POSIX_LOCK)
1980 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1981
1982 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1983 if (ret != 0)
1984 goto out;
1985
91876b13 1986 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1987 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1988 *res = state;
1989out:
1990 return ret;
1991}
1992
1da177e4 1993/*
24ac23ab 1994 * Returns a referenced nfs4_state
1da177e4 1995 */
82be417a
AA		 1996static int _nfs4_do_open(struct inode *dir,
1997 struct dentry *dentry,
1998 fmode_t fmode,
1999 int flags,
2000 struct iattr *sattr,
1775fd3e 2001 struct nfs4_label *label,
82be417a
AA		 2002 struct rpc_cred *cred,
2003 struct nfs4_state **res,
2004 struct nfs4_threshold **ctx_th)
1da177e4
LT		 2005{
2006 struct nfs4_state_owner *sp;
2007 struct nfs4_state *state = NULL;
2008 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2009 struct nfs4_opendata *opendata;
49f9a0fa 2010 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2011 struct nfs4_label *olabel = NULL;
aac00a8d 2012 int status;
1da177e4
LT		 2013
2014 /* Protect against reboot recovery conflicts */
1da177e4 2015 status = -ENOMEM;
d1e284d5
TM		 2016 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2017 if (sp == NULL) {
1da177e4
LT		 2018 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2019 goto out_err;
2020 }
58d9714a
TM		 2021 status = nfs4_recover_expired_lease(server);
2022 if (status != 0)
b4454fe1 2023 goto err_put_state_owner;
82a2c1b7
AV		 2024 if (dentry->d_inode != NULL)
2025 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2026 status = -ENOMEM;
49f9a0fa
TM		 2027 if (dentry->d_inode)
2028 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2029 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2030 label, claim, GFP_KERNEL);
e56e0b78 2031 if (opendata == NULL)
95d35cb4 2032 goto err_put_state_owner;
1da177e4 2033
14c43f76
DQ		 2034 if (label) {
2035 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2036 if (IS_ERR(olabel)) {
2037 status = PTR_ERR(olabel);
2038 goto err_opendata_put;
2039 }
2040 }
2041
82be417a
AA		 2042 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2043 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2044 if (!opendata->f_attr.mdsthreshold)
14c43f76 2045 goto err_free_label;
1549210f 2046 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2047 }
82a2c1b7
AV		 2048 if (dentry->d_inode != NULL)
2049 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2050
c21443c2 2051 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c 2052 if (status != 0)
14c43f76 2053 goto err_free_label;
6168f62c 2054
549b19cc
TM		 2055 if ((opendata->o_arg.open_flags & O_EXCL) &&
2056 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2057 nfs4_exclusive_attrset(opendata, sattr);
2058
2059 nfs_fattr_init(opendata->o_res.f_attr);
2060 status = nfs4_do_setattr(state->inode, cred,
2061 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2062 state, label, olabel);
2063 if (status == 0) {
0ab64e0e 2064 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e
DQ		 2065 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2066 }
0ab64e0e 2067 }
82be417a
AA		 2068
2069 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2070 *ctx_th = opendata->f_attr.mdsthreshold;
2071 else
2072 kfree(opendata->f_attr.mdsthreshold);
2073 opendata->f_attr.mdsthreshold = NULL;
2074
14c43f76
DQ		 2075 nfs4_label_free(olabel);
2076
c6d00e63 2077 nfs4_opendata_put(opendata);
1da177e4 2078 nfs4_put_state_owner(sp);
1da177e4
LT		 2079 *res = state;
2080 return 0;
14c43f76
DQ		 2081err_free_label:
2082 nfs4_label_free(olabel);
c6d00e63 2083err_opendata_put:
82be417a 2084 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2085 nfs4_opendata_put(opendata);
e56e0b78
TM		 2086err_put_state_owner:
2087 nfs4_put_state_owner(sp);
1da177e4 2088out_err:
1da177e4
LT		 2089 *res = NULL;
2090 return status;
2091}
2092
2093
82be417a
AA		 2094static struct nfs4_state *nfs4_do_open(struct inode *dir,
2095 struct dentry *dentry,
2096 fmode_t fmode,
2097 int flags,
2098 struct iattr *sattr,
1775fd3e 2099 struct nfs4_label *label,
82be417a
AA		 2100 struct rpc_cred *cred,
2101 struct nfs4_threshold **ctx_th)
1da177e4 2102{
49f9a0fa 2103 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2104 struct nfs4_exception exception = { };
2105 struct nfs4_state *res;
2106 int status;
2107
6168f62c 2108 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2109 do {
1775fd3e 2110 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, label, cred,
82be417a 2111 &res, ctx_th);
1da177e4
LT		 2112 if (status == 0)
2113 break;
2114 /* NOTE: BAD_SEQID means the server and client disagree about the
2115 * book-keeping w.r.t. state-changing operations
2116 * (OPEN/CLOSE/LOCK/LOCKU...)
2117 * It is actually a sign of a bug on the client or on the server.
2118 *
2119 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2120 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2121 * have unhashed the old state_owner for us, and that we can
2122 * therefore safely retry using a new one. We should still warn
2123 * the user though...
2124 */
2125 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2126 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2127 " returned a bad sequence-id error!\n",
2128 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2129 exception.retry = 1;
2130 continue;
2131 }
550f5747
TM		 2132 /*
2133 * BAD_STATEID on OPEN means that the server cancelled our
2134 * state before it received the OPEN_CONFIRM.
2135 * Recover by retrying the request as per the discussion
2136 * on Page 181 of RFC3530.
2137 */
2138 if (status == -NFS4ERR_BAD_STATEID) {
2139 exception.retry = 1;
2140 continue;
2141 }
aac00a8d
TM		 2142 if (status == -EAGAIN) {
2143 /* We must have found a delegation */
2144 exception.retry = 1;
2145 continue;
2146 }
49f9a0fa
TM		 2147 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2148 continue;
2149 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2150 status, &exception));
2151 } while (exception.retry);
2152 return res;
2153}
2154
659bfcd6
TM		 2155static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2156 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2157 struct nfs4_state *state, struct nfs4_label *ilabel,
2158 struct nfs4_label *olabel)
1da177e4 2159{
3e4f6290 2160 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2161 struct nfs_setattrargs arg = {
3e4f6290 2162 .fh = NFS_FH(inode),
1da177e4
LT		 2163 .iap = sattr,
2164 .server = server,
2165 .bitmask = server->attr_bitmask,
1775fd3e 2166 .label = ilabel,
1da177e4
LT		 2167 };
2168 struct nfs_setattrres res = {
2169 .fattr = fattr,
1775fd3e 2170 .label = olabel,
1da177e4
LT		 2171 .server = server,
2172 };
2173 struct rpc_message msg = {
659bfcd6
TM		 2174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2175 .rpc_argp = &arg,
2176 .rpc_resp = &res,
2177 .rpc_cred = cred,
1da177e4 2178 };
26e976a8 2179 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2180 fmode_t fmode;
2181 bool truncate;
65e4308d 2182 int status;
1da177e4 2183
0e574af1 2184 nfs_fattr_init(fattr);
1da177e4 2185
ee3ae84e
TM		 2186 /* Servers should only apply open mode checks for file size changes */
2187 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2188 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2189
2190 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2191 /* Use that stateid */
2192 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2193 struct nfs_lockowner lockowner = {
2194 .l_owner = current->files,
2195 .l_pid = current->tgid,
2196 };
4fc8796d 2197 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2198 &lockowner);
08e9eac4 2199 } else
f597c537 2200 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2201
7c513058 2202 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2203 if (status == 0 && state != NULL)
2204 renew_lease(server, timestamp);
65e4308d 2205 return status;
1da177e4
LT		 2206}
2207
659bfcd6
TM		 2208static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2209 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2210 struct nfs4_state *state, struct nfs4_label *ilabel,
2211 struct nfs4_label *olabel)
1da177e4 2212{
3e4f6290 2213 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2214 struct nfs4_exception exception = {
2215 .state = state,
3114ea7a 2216 .inode = inode,
a1d0b5ee 2217 };
1da177e4
LT		 2218 int err;
2219 do {
1775fd3e 2220 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
451146be
TM		 2221 switch (err) {
2222 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2223 if (!(sattr->ia_valid & ATTR_SIZE)) {
2224 pr_warn_once("NFSv4: server %s is incorrectly "
2225 "applying open mode checks to "
2226 "a SETATTR that is not "
2227 "changing file size.\n",
2228 server->nfs_client->cl_hostname);
2229 }
451146be
TM		 2230 if (state && !(state->state & FMODE_WRITE)) {
2231 err = -EBADF;
2232 if (sattr->ia_valid & ATTR_OPEN)
2233 err = -EACCES;
2234 goto out;
2235 }
2236 }
2237 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2238 } while (exception.retry);
451146be 2239out:
1da177e4
LT		 2240 return err;
2241}
2242
2243struct nfs4_closedata {
2244 struct inode *inode;
2245 struct nfs4_state *state;
2246 struct nfs_closeargs arg;
2247 struct nfs_closeres res;
516a6af6 2248 struct nfs_fattr fattr;
26e976a8 2249 unsigned long timestamp;
f7e8917a
FI		 2250 bool roc;
2251 u32 roc_barrier;
1da177e4
LT		 2252};
2253
963d8fe5 2254static void nfs4_free_closedata(void *data)
9512135d 2255{
963d8fe5
TM		 2256 struct nfs4_closedata *calldata = data;
2257 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2258 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2259
f7e8917a
FI		 2260 if (calldata->roc)
2261 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2262 nfs4_put_open_state(calldata->state);
2263 nfs_free_seqid(calldata->arg.seqid);
9512135d 2264 nfs4_put_state_owner(sp);
322b2b90 2265 nfs_sb_deactive(sb);
9512135d
TM		 2266 kfree(calldata);
2267}
2268
88069f77
TM		 2269static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2270 fmode_t fmode)
2271{
2272 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2273 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2274 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2275 case FMODE_WRITE:
88069f77 2276 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2277 break;
2278 case FMODE_READ:
88069f77 2279 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2280 break;
2281 case 0:
2282 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2283 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2284 clear_bit(NFS_OPEN_STATE, &state->flags);
2285 }
88069f77
TM		 2286 spin_unlock(&state->owner->so_lock);
2287}
2288
963d8fe5 2289static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2290{
963d8fe5 2291 struct nfs4_closedata *calldata = data;
1da177e4 2292 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2293 struct nfs_server *server = NFS_SERVER(calldata->inode);
2294
a3ca5651 2295 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2296 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2297 return;
1da177e4
LT		 2298 /* hmm. we are done with the inode, and in the process of freeing
2299 * the state_owner. we keep this around to process errors
2300 */
1da177e4
LT		 2301 switch (task->tk_status) {
2302 case 0:
f7e8917a
FI		 2303 if (calldata->roc)
2304 pnfs_roc_set_barrier(state->inode,
2305 calldata->roc_barrier);
45328c35 2306 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2307 renew_lease(server, calldata->timestamp);
88069f77
TM		 2308 nfs4_close_clear_stateid_flags(state,
2309 calldata->arg.fmode);
1da177e4
LT		 2310 break;
2311 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2312 case -NFS4ERR_OLD_STATEID:
2313 case -NFS4ERR_BAD_STATEID:
1da177e4 2314 case -NFS4ERR_EXPIRED:
dc0b027d 2315 if (calldata->arg.fmode == 0)
9e33bed5 2316 break;
1da177e4 2317 default:
72211dbe
TM		 2318 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2319 rpc_restart_call_prepare(task);
1da177e4 2320 }
72211dbe 2321 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2322 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2323 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2324}
2325
4ce70ada 2326static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2327{
4ce70ada 2328 struct nfs4_closedata *calldata = data;
9512135d 2329 struct nfs4_state *state = calldata->state;
7fdab069 2330 struct inode *inode = calldata->inode;
88069f77 2331 int call_close = 0;
9512135d 2332
a3ca5651 2333 dprintk("%s: begin!\n", __func__);
963d8fe5 2334 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2335 goto out_wait;
003707c7 2336
88069f77
TM		 2337 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2338 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2339 spin_lock(&state->owner->so_lock);
003707c7 2340 /* Calculate the change in open mode */
e7616923 2341 if (state->n_rdwr == 0) {
003707c7 2342 if (state->n_rdonly == 0) {
88069f77
TM		 2343 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2344 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2345 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2346 }
2347 if (state->n_wronly == 0) {
88069f77
TM		 2348 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2349 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2350 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2351 }
e7616923 2352 }
5d422301
TM		 2353 if (!nfs4_valid_open_stateid(state))
2354 call_close = 0;
4cecb76f 2355 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2356
2357 if (!call_close) {
963d8fe5 2358 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2359 goto out_no_action;
9512135d 2360 }
88069f77 2361
f7e8917a 2362 if (calldata->arg.fmode == 0) {
88069f77 2363 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2364 if (calldata->roc &&
b9536ad5
AA		 2365 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2366 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2367 goto out_wait;
b9536ad5 2368 }
f7e8917a 2369 }
88069f77 2370
516a6af6 2371 nfs_fattr_init(calldata->res.fattr);
26e976a8 2372 calldata->timestamp = jiffies;
7fdab069 2373 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2374 &calldata->arg.seq_args,
2375 &calldata->res.seq_res,
2240a9e2
TM		 2376 task) != 0)
2377 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2378 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2379 return;
2380out_no_action:
2381 task->tk_action = NULL;
2382out_wait:
2383 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2384}
2385
963d8fe5 2386static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2387 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2388 .rpc_call_done = nfs4_close_done,
2389 .rpc_release = nfs4_free_closedata,
2390};
2391
1da177e4
LT		 2392/*
2393 * It is possible for data to be read/written from a mem-mapped file
2394 * after the sys_close call (which hits the vfs layer as a flush).
2395 * This means that we can't safely call nfsv4 close on a file until
2396 * the inode is cleared. This in turn means that we are not good
2397 * NFSv4 citizens - we do not indicate to the server to update the file's
2398 * share state even when we are done with one of the three share
2399 * stateid's in the inode.
2400 *
2401 * NOTE: Caller must be holding the sp->so_owner semaphore!
2402 */
1f7977c1 2403int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2404{
4a35bd41 2405 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2406 struct nfs4_closedata *calldata;
b39e625b
TM		 2407 struct nfs4_state_owner *sp = state->owner;
2408 struct rpc_task *task;
5138fde0
TM		 2409 struct rpc_message msg = {
2410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2411 .rpc_cred = state->owner->so_cred,
2412 };
c970aa85
TM		 2413 struct rpc_task_setup task_setup_data = {
2414 .rpc_client = server->client,
5138fde0 2415 .rpc_message = &msg,
c970aa85 2416 .callback_ops = &nfs4_close_ops,
101070ca 2417 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2418 .flags = RPC_TASK_ASYNC,
2419 };
9512135d 2420 int status = -ENOMEM;
1da177e4 2421
8535b2be 2422 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2423 if (calldata == NULL)
9512135d 2424 goto out;
9d12b216 2425 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2426 calldata->inode = state->inode;
1da177e4 2427 calldata->state = state;
4a35bd41 2428 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2429 calldata->arg.stateid = &state->open_stateid;
1da177e4 2430 /* Serialization for the sequence id */
8535b2be 2431 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2432 if (calldata->arg.seqid == NULL)
2433 goto out_free_calldata;
dc0b027d 2434 calldata->arg.fmode = 0;
a65318bf 2435 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2436 calldata->res.fattr = &calldata->fattr;
c1d51931 2437 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2438 calldata->res.server = server;
1f7977c1 2439 calldata->roc = pnfs_roc(state->inode);
643168c2 2440 nfs_sb_active(calldata->inode->i_sb);
9512135d 2441
1174dd1f
TM		 2442 msg.rpc_argp = &calldata->arg;
2443 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2444 task_setup_data.callback_data = calldata;
2445 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2446 if (IS_ERR(task))
2447 return PTR_ERR(task);
a49c3c77
TM		 2448 status = 0;
2449 if (wait)
2450 status = rpc_wait_for_completion_task(task);
b39e625b 2451 rpc_put_task(task);
a49c3c77 2452 return status;
9512135d
TM		 2453out_free_calldata:
2454 kfree(calldata);
2455out:
b39e625b
TM		 2456 nfs4_put_open_state(state);
2457 nfs4_put_state_owner(sp);
9512135d 2458 return status;
1da177e4
LT		 2459}
2460
2b484297 2461static struct inode *
cd9a1c0e 2462nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2463{
1da177e4 2464 struct nfs4_state *state;
1775fd3e 2465 struct nfs4_label *label = NULL;
1da177e4 2466
565277f6 2467 /* Protect against concurrent sillydeletes */
1775fd3e 2468 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, label,
82be417a 2469 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2470 if (IS_ERR(state))
2471 return ERR_CAST(state);
cd9a1c0e 2472 ctx->state = state;
f46e0bd3 2473 return igrab(state->inode);
1da177e4
LT		 2474}
2475
1185a552 2476static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2477{
2478 if (ctx->state == NULL)
2479 return;
2480 if (is_sync)
643168c2 2481 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2482 else
643168c2 2483 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2484}
1da177e4
LT		 2485
2486static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2487{
43652ad5
BH		 2488 struct nfs4_server_caps_arg args = {
2489 .fhandle = fhandle,
2490 };
1da177e4
LT		 2491 struct nfs4_server_caps_res res = {};
2492 struct rpc_message msg = {
2493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2494 .rpc_argp = &args,
1da177e4
LT		 2495 .rpc_resp = &res,
2496 };
2497 int status;
2498
7c513058 2499 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2500 if (status == 0) {
2501 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2502 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2503 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2504 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2505 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2506 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2507 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2508 server->caps |= NFS_CAP_ACLS;
2509 if (res.has_links != 0)
2510 server->caps |= NFS_CAP_HARDLINKS;
2511 if (res.has_symlinks != 0)
2512 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2513 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2514 server->caps |= NFS_CAP_FILEID;
2515 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2516 server->caps |= NFS_CAP_MODE;
2517 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2518 server->caps |= NFS_CAP_NLINK;
2519 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2520 server->caps |= NFS_CAP_OWNER;
2521 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2522 server->caps |= NFS_CAP_OWNER_GROUP;
2523 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2524 server->caps |= NFS_CAP_ATIME;
2525 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2526 server->caps |= NFS_CAP_CTIME;
2527 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2528 server->caps |= NFS_CAP_MTIME;
2529
a65318bf
TM		 2530 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2531 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2532 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2533 server->acl_bitmask = res.acl_bitmask;
264e6351 2534 server->fh_expire_type = res.fh_expire_type;
1da177e4 2535 }
cccef3b9 2536
1da177e4
LT		 2537 return status;
2538}
2539
55a97593 2540int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2541{
2542 struct nfs4_exception exception = { };
2543 int err;
2544 do {
2545 err = nfs4_handle_exception(server,
2546 _nfs4_server_capabilities(server, fhandle),
2547 &exception);
2548 } while (exception.retry);
2549 return err;
2550}
2551
2552static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2553 struct nfs_fsinfo *info)
2554{
1da177e4
LT		 2555 struct nfs4_lookup_root_arg args = {
2556 .bitmask = nfs4_fattr_bitmap,
2557 };
2558 struct nfs4_lookup_res res = {
2559 .server = server,
0e574af1 2560 .fattr = info->fattr,
1da177e4
LT		 2561 .fh = fhandle,
2562 };
2563 struct rpc_message msg = {
2564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2565 .rpc_argp = &args,
2566 .rpc_resp = &res,
2567 };
008f55d0 2568
0e574af1 2569 nfs_fattr_init(info->fattr);
7c513058 2570 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2571}
2572
2573static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2574 struct nfs_fsinfo *info)
2575{
2576 struct nfs4_exception exception = { };
2577 int err;
2578 do {
fb8a5ba8
BS		 2579 err = _nfs4_lookup_root(server, fhandle, info);
2580 switch (err) {
2581 case 0:
2582 case -NFS4ERR_WRONGSEC:
05e9cfb4 2583 goto out;
fb8a5ba8
BS		 2584 default:
2585 err = nfs4_handle_exception(server, err, &exception);
2586 }
1da177e4 2587 } while (exception.retry);
05e9cfb4 2588out:
1da177e4
LT		 2589 return err;
2590}
2591
8f70e95f
BS		 2592static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2593 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2594{
2595 struct rpc_auth *auth;
2596 int ret;
2597
2598 auth = rpcauth_create(flavor, server->client);
e8d920c5 2599 if (IS_ERR(auth)) {
75bc8821 2600 ret = -EACCES;
8f70e95f
BS		 2601 goto out;
2602 }
2603 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2604out:
2605 return ret;
2606}
2607
9a744ba3
CL		 2608/*
2609 * Retry pseudoroot lookup with various security flavors. We do this when:
2610 *
2611 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2612 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2613 *
2614 * Returns zero on success, or a negative NFS4ERR value, or a
2615 * negative errno value.
2616 */
801a16dc 2617static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2618 struct nfs_fsinfo *info)
1da177e4 2619{
9a744ba3
CL		 2620 /* Per 3530bis 15.33.5 */
2621 static const rpc_authflavor_t flav_array[] = {
2622 RPC_AUTH_GSS_KRB5P,
2623 RPC_AUTH_GSS_KRB5I,
2624 RPC_AUTH_GSS_KRB5,
c4eafe11 2625 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2626 RPC_AUTH_NULL,
2627 };
2628 int status = -EPERM;
2629 size_t i;
6a1a1e34 2630
9a744ba3 2631 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2632 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2633 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2634 continue;
2635 break;
8f70e95f 2636 }
9a744ba3 2637
fb8a5ba8
BS		 2638 /*
2639 * -EACCESS could mean that the user doesn't have correct permissions
2640 * to access the mount. It could also mean that we tried to mount
2641 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2642 * existing mount programs don't handle -EACCES very well so it should
2643 * be mapped to -EPERM instead.
2644 */
2645 if (status == -EACCES)
2646 status = -EPERM;
801a16dc
BS		 2647 return status;
2648}
2649
2ed4b95b
CL		 2650static int nfs4_do_find_root_sec(struct nfs_server *server,
2651 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2652{
2653 int mv = server->nfs_client->cl_minorversion;
2654 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2655}
2656
2657/**
2658 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2659 * @server: initialized nfs_server handle
2660 * @fhandle: we fill in the pseudo-fs root file handle
2661 * @info: we fill in an FSINFO struct
2662 *
2663 * Returns zero on success, or a negative errno.
801a16dc 2664 */
3028eb2b
BS		 2665int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2666 struct nfs_fsinfo *info)
801a16dc 2667{
2ed4b95b
CL		 2668 int status;
2669
2670 status = nfs4_lookup_root(server, fhandle, info);
2671 if ((status == -NFS4ERR_WRONGSEC) &&
2672 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2673 status = nfs4_do_find_root_sec(server, fhandle, info);
2674
1da177e4
LT		 2675 if (status == 0)
2676 status = nfs4_server_capabilities(server, fhandle);
2677 if (status == 0)
2678 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2679
c12e87f4 2680 return nfs4_map_errors(status);
1da177e4
LT		 2681}
2682
bae36241
BS		 2683static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2684 struct nfs_fsinfo *info)
2685{
2686 int error;
2687 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2688 struct nfs4_label *label = NULL;
bae36241
BS		 2689
2690 error = nfs4_server_capabilities(server, mntfh);
2691 if (error < 0) {
2692 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2693 return error;
2694 }
2695
14c43f76
DQ		 2696 label = nfs4_label_alloc(server, GFP_KERNEL);
2697 if (IS_ERR(label))
2698 return PTR_ERR(label);
2699
1775fd3e 2700 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2701 if (error < 0) {
2702 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2703 goto err_free_label;
bae36241
BS		 2704 }
2705
2706 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2707 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2708 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2709
14c43f76
DQ		 2710err_free_label:
2711 nfs4_label_free(label);
2712
bae36241
BS		 2713 return error;
2714}
2715
6b97fd3d
MN		 2716/*
2717 * Get locations and (maybe) other attributes of a referral.
2718 * Note that we'll actually follow the referral later when
2719 * we detect fsid mismatch in inode revalidation
2720 */
f05d147f
BS		 2721static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2722 const struct qstr *name, struct nfs_fattr *fattr,
2723 struct nfs_fh *fhandle)
6b97fd3d
MN		 2724{
2725 int status = -ENOMEM;
2726 struct page *page = NULL;
2727 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2728
2729 page = alloc_page(GFP_KERNEL);
2730 if (page == NULL)
2731 goto out;
2732 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2733 if (locations == NULL)
2734 goto out;
2735
f05d147f 2736 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2737 if (status != 0)
2738 goto out;
2739 /* Make sure server returned a different fsid for the referral */
2740 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2741 dprintk("%s: server did not return a different fsid for"
2742 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2743 status = -EIO;
2744 goto out;
2745 }
533eb461
AA		 2746 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2747 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2748
533eb461 2749 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2750 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2751 memset(fhandle, 0, sizeof(struct nfs_fh));
2752out:
2753 if (page)
2754 __free_page(page);
5d7ca35a 2755 kfree(locations);
6b97fd3d
MN		 2756 return status;
2757}
2758
1775fd3e
DQ		 2759static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2760 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2761{
2762 struct nfs4_getattr_arg args = {
2763 .fh = fhandle,
2764 .bitmask = server->attr_bitmask,
2765 };
2766 struct nfs4_getattr_res res = {
2767 .fattr = fattr,
1775fd3e 2768 .label = label,
1da177e4
LT		 2769 .server = server,
2770 };
2771 struct rpc_message msg = {
2772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2773 .rpc_argp = &args,
2774 .rpc_resp = &res,
2775 };
2776
0e574af1 2777 nfs_fattr_init(fattr);
7c513058 2778 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2779}
2780
1775fd3e
DQ		 2781static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2782 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2783{
2784 struct nfs4_exception exception = { };
2785 int err;
2786 do {
2787 err = nfs4_handle_exception(server,
1775fd3e 2788 _nfs4_proc_getattr(server, fhandle, fattr, label),
1da177e4
LT		 2789 &exception);
2790 } while (exception.retry);
2791 return err;
2792}
2793
2794/*
2795 * The file is not closed if it is opened due to the a request to change
2796 * the size of the file. The open call will not be needed once the
2797 * VFS layer lookup-intents are implemented.
2798 *
2799 * Close is called when the inode is destroyed.
2800 * If we haven't opened the file for O_WRONLY, we
2801 * need to in the size_change case to obtain a stateid.
2802 *
2803 * Got race?
2804 * Because OPEN is always done by name in nfsv4, it is
2805 * possible that we opened a different file by the same
2806 * name. We can recognize this race condition, but we
2807 * can't do anything about it besides returning an error.
2808 *
2809 * This will be fixed with VFS changes (lookup-intent).
2810 */
2811static int
2812nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2813 struct iattr *sattr)
2814{
08e9eac4 2815 struct inode *inode = dentry->d_inode;
659bfcd6 2816 struct rpc_cred *cred = NULL;
d530838b 2817 struct nfs4_state *state = NULL;
14c43f76 2818 struct nfs4_label *label = NULL;
1da177e4
LT		 2819 int status;
2820
8a1636c4 2821 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2822 pnfs_commit_and_return_layout(inode);
8a1636c4 2823
0e574af1 2824 nfs_fattr_init(fattr);
1da177e4 2825
2669940d
AA		 2826 /* Deal with open(O_TRUNC) */
2827 if (sattr->ia_valid & ATTR_OPEN)
2828 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2829
2830 /* Optimization: if the end result is no change, don't RPC */
2831 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2832 return 0;
2833
d530838b 2834 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2835 if (sattr->ia_valid & ATTR_FILE) {
2836 struct nfs_open_context *ctx;
2837
2838 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2839 if (ctx) {
2840 cred = ctx->cred;
2841 state = ctx->state;
2842 }
659bfcd6 2843 }
08e9eac4 2844
14c43f76
DQ		 2845 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
2846 if (IS_ERR(label))
2847 return PTR_ERR(label);
2848
2849 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
65e4308d
TM		 2850 if (status == 0)
2851 nfs_setattr_update_inode(inode, sattr);
14c43f76
DQ		 2852
2853 nfs4_label_free(label);
1da177e4
LT		 2854 return status;
2855}
2856
0c2e53f1
TM		 2857static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2858 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 2859 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 2860{
0c2e53f1 2861 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2862 int status;
2863 struct nfs4_lookup_arg args = {
2864 .bitmask = server->attr_bitmask,
0c2e53f1 2865 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2866 .name = name,
2867 };
2868 struct nfs4_lookup_res res = {
2869 .server = server,
2870 .fattr = fattr,
2871 .fh = fhandle,
2872 };
2873 struct rpc_message msg = {
2874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2875 .rpc_argp = &args,
2876 .rpc_resp = &res,
2877 };
2878
2879 nfs_fattr_init(fattr);
2880
1da177e4 2881 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2882 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2883 dprintk("NFS reply lookup: %d\n", status);
2884 return status;
2885}
2886
72de53ec 2887static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2888{
7ebb9315 2889 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2890 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2891 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2892 fattr->nlink = 2;
2893}
2894
72de53ec
BS		 2895static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2896 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 2897 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2898{
2899 struct nfs4_exception exception = { };
72de53ec 2900 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2901 int err;
2902 do {
1775fd3e 2903 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
72de53ec 2904 switch (err) {
08ef7bd3 2905 case -NFS4ERR_BADNAME:
72de53ec
BS		 2906 err = -ENOENT;
2907 goto out;
0c2e53f1 2908 case -NFS4ERR_MOVED:
f05d147f 2909 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2910 goto out;
0c2e53f1 2911 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2912 err = -EPERM;
2913 if (client != *clnt)
2914 goto out;
2915
2916 client = nfs4_create_sec_client(client, dir, name);
2917 if (IS_ERR(client))
2918 return PTR_ERR(client);
2919
2920 exception.retry = 1;
2921 break;
2922 default:
2923 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2924 }
1da177e4 2925 } while (exception.retry);
72de53ec
BS		 2926
2927out:
2928 if (err == 0)
2929 *clnt = client;
2930 else if (client != *clnt)
2931 rpc_shutdown_client(client);
2932
1da177e4
LT		 2933 return err;
2934}
2935
80a16b21 2936static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 2937 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
2938 struct nfs4_label *label)
72de53ec
BS		 2939{
2940 int status;
2941 struct rpc_clnt *client = NFS_CLIENT(dir);
2942
1775fd3e 2943 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 2944 if (client != NFS_CLIENT(dir)) {
2945 rpc_shutdown_client(client);
2946 nfs_fixup_secinfo_attributes(fattr);
2947 }
2948 return status;
2949}
2950
f05d147f
BS		 2951struct rpc_clnt *
2952nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2953 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2954{
2955 int status;
2956 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2957
1775fd3e 2958 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 2959 if (status < 0) {
2960 rpc_shutdown_client(client);
2961 return ERR_PTR(status);
2962 }
2963 return client;
2964}
2965
1da177e4
LT		 2966static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2967{
76b32999 2968 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2969 struct nfs4_accessargs args = {
2970 .fh = NFS_FH(inode),
a4980e78 2971 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2972 };
2973 struct nfs4_accessres res = {
2974 .server = server,
1da177e4 2975 };
1da177e4
LT		 2976 struct rpc_message msg = {
2977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2978 .rpc_argp = &args,
2979 .rpc_resp = &res,
2980 .rpc_cred = entry->cred,
2981 };
2982 int mode = entry->mask;
2983 int status;
2984
2985 /*
2986 * Determine which access bits we want to ask for...
2987 */
2988 if (mode & MAY_READ)
2989 args.access |= NFS4_ACCESS_READ;
2990 if (S_ISDIR(inode->i_mode)) {
2991 if (mode & MAY_WRITE)
2992 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2993 if (mode & MAY_EXEC)
2994 args.access |= NFS4_ACCESS_LOOKUP;
2995 } else {
2996 if (mode & MAY_WRITE)
2997 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2998 if (mode & MAY_EXEC)
2999 args.access |= NFS4_ACCESS_EXECUTE;
3000 }
c407d41a
TM		 3001
3002 res.fattr = nfs_alloc_fattr();
3003 if (res.fattr == NULL)
3004 return -ENOMEM;
3005
7c513058 3006 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3007 if (!status) {
6168f62c 3008 nfs_access_set_mask(entry, res.access);
c407d41a 3009 nfs_refresh_inode(inode, res.fattr);
1da177e4 3010 }
c407d41a 3011 nfs_free_fattr(res.fattr);
1da177e4
LT		 3012 return status;
3013}
3014
3015static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3016{
3017 struct nfs4_exception exception = { };
3018 int err;
3019 do {
3020 err = nfs4_handle_exception(NFS_SERVER(inode),
3021 _nfs4_proc_access(inode, entry),
3022 &exception);
3023 } while (exception.retry);
3024 return err;
3025}
3026
3027/*
3028 * TODO: For the time being, we don't try to get any attributes
3029 * along with any of the zero-copy operations READ, READDIR,
3030 * READLINK, WRITE.
3031 *
3032 * In the case of the first three, we want to put the GETATTR
3033 * after the read-type operation -- this is because it is hard
3034 * to predict the length of a GETATTR response in v4, and thus
3035 * align the READ data correctly. This means that the GETATTR
3036 * may end up partially falling into the page cache, and we should
3037 * shift it into the 'tail' of the xdr_buf before processing.
3038 * To do this efficiently, we need to know the total length
3039 * of data received, which doesn't seem to be available outside
3040 * of the RPC layer.
3041 *
3042 * In the case of WRITE, we also want to put the GETATTR after
3043 * the operation -- in this case because we want to make sure
140150db 3044 * we get the post-operation mtime and size.
1da177e4
LT		 3045 *
3046 * Both of these changes to the XDR layer would in fact be quite
3047 * minor, but I decided to leave them for a subsequent patch.
3048 */
3049static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3050 unsigned int pgbase, unsigned int pglen)
3051{
3052 struct nfs4_readlink args = {
3053 .fh = NFS_FH(inode),
3054 .pgbase = pgbase,
3055 .pglen = pglen,
3056 .pages = &page,
3057 };
f50c7000 3058 struct nfs4_readlink_res res;
1da177e4
LT		 3059 struct rpc_message msg = {
3060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3061 .rpc_argp = &args,
f50c7000 3062 .rpc_resp = &res,
1da177e4
LT		 3063 };
3064
7c513058 3065 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3066}
3067
3068static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3069 unsigned int pgbase, unsigned int pglen)
3070{
3071 struct nfs4_exception exception = { };
3072 int err;
3073 do {
3074 err = nfs4_handle_exception(NFS_SERVER(inode),
3075 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3076 &exception);
3077 } while (exception.retry);
3078 return err;
3079}
3080
1da177e4 3081/*
8867fe58 3082 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3083 */
1da177e4
LT		 3084static int
3085nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3086 int flags)
1da177e4 3087{
1775fd3e 3088 struct nfs4_label *ilabel = NULL;
8867fe58 3089 struct nfs_open_context *ctx;
1da177e4 3090 struct nfs4_state *state;
1da177e4
LT		 3091 int status = 0;
3092
8867fe58
MS		 3093 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3094 if (IS_ERR(ctx))
3095 return PTR_ERR(ctx);
3096
a8a5da99 3097 sattr->ia_mode &= ~current_umask();
8626e4a4 3098 state = nfs4_do_open(dir, dentry, ctx->mode,
1775fd3e 3099 flags, sattr, ilabel, ctx->cred,
8626e4a4 3100 &ctx->mdsthreshold);
d4d9cdcb 3101 d_drop(dentry);
1da177e4
LT		 3102 if (IS_ERR(state)) {
3103 status = PTR_ERR(state);
c0204fd2 3104 goto out;
1da177e4 3105 }
d4d9cdcb 3106 d_add(dentry, igrab(state->inode));
d75340cc 3107 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3108 ctx->state = state;
1da177e4 3109out:
8867fe58 3110 put_nfs_open_context(ctx);
1da177e4
LT		 3111 return status;
3112}
3113
3114static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3115{
16e42959 3116 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3117 struct nfs_removeargs args = {
1da177e4 3118 .fh = NFS_FH(dir),
26fe5750 3119 .name = *name,
16e42959 3120 };
4fdc17b2 3121 struct nfs_removeres res = {
16e42959 3122 .server = server,
1da177e4 3123 };
1da177e4 3124 struct rpc_message msg = {
4fdc17b2
TM		 3125 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3126 .rpc_argp = &args,
3127 .rpc_resp = &res,
1da177e4 3128 };
778d2817 3129 int status;
1da177e4 3130
7c513058 3131 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3132 if (status == 0)
16e42959 3133 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3134 return status;
3135}
3136
3137static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3138{
3139 struct nfs4_exception exception = { };
3140 int err;
3141 do {
3142 err = nfs4_handle_exception(NFS_SERVER(dir),
3143 _nfs4_proc_remove(dir, name),
3144 &exception);
3145 } while (exception.retry);
3146 return err;
3147}
3148
e4eff1a6 3149static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3150{
e4eff1a6
TM		 3151 struct nfs_server *server = NFS_SERVER(dir);
3152 struct nfs_removeargs *args = msg->rpc_argp;
3153 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3154
e4eff1a6 3155 res->server = server;
1da177e4 3156 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3157 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3158}
3159
34e137cc
BS		 3160static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3161{
d9afbd1b
TM		 3162 nfs4_setup_sequence(NFS_SERVER(data->dir),
3163 &data->args.seq_args,
3164 &data->res.seq_res,
3165 task);
1da177e4
LT		 3166}
3167
e4eff1a6 3168static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3169{
e4eff1a6
TM		 3170 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3171
14516c3a
TM		 3172 if (!nfs4_sequence_done(task, &res->seq_res))
3173 return 0;
9e33bed5 3174 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3175 return 0;
3176 update_changeattr(dir, &res->cinfo);
e4eff1a6 3177 return 1;
1da177e4
LT		 3178}
3179
d3d4152a
JL		 3180static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3181{
3182 struct nfs_server *server = NFS_SERVER(dir);
3183 struct nfs_renameargs *arg = msg->rpc_argp;
3184 struct nfs_renameres *res = msg->rpc_resp;
3185
3186 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3187 res->server = server;
9d12b216 3188 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3189}
3190
c6bfa1a1
BS		 3191static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3192{
d9afbd1b
TM		 3193 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3194 &data->args.seq_args,
3195 &data->res.seq_res,
3196 task);
d3d4152a
JL		 3197}
3198
3199static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3200 struct inode *new_dir)
3201{
3202 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3203
3204 if (!nfs4_sequence_done(task, &res->seq_res))
3205 return 0;
3206 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3207 return 0;
3208
3209 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3210 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3211 return 1;
3212}
3213
1da177e4
LT		 3214static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3215 struct inode *new_dir, struct qstr *new_name)
3216{
6caf2c82 3217 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3218 struct nfs_renameargs arg = {
1da177e4
LT		 3219 .old_dir = NFS_FH(old_dir),
3220 .new_dir = NFS_FH(new_dir),
3221 .old_name = old_name,
3222 .new_name = new_name,
6caf2c82 3223 };
e8582a8b 3224 struct nfs_renameres res = {
6caf2c82 3225 .server = server,
1da177e4 3226 };
1da177e4
LT		 3227 struct rpc_message msg = {
3228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3229 .rpc_argp = &arg,
3230 .rpc_resp = &res,
3231 };
011fff72 3232 int status = -ENOMEM;
14c43f76 3233
7c513058 3234 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3235 if (!status) {
3236 update_changeattr(old_dir, &res.old_cinfo);
3237 update_changeattr(new_dir, &res.new_cinfo);
3238 }
3239 return status;
3240}
3241
3242static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3243 struct inode *new_dir, struct qstr *new_name)
3244{
3245 struct nfs4_exception exception = { };
3246 int err;
3247 do {
3248 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3249 _nfs4_proc_rename(old_dir, old_name,
3250 new_dir, new_name),
3251 &exception);
3252 } while (exception.retry);
3253 return err;
3254}
3255
3256static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3257{
91ba2eee 3258 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3259 struct nfs4_link_arg arg = {
3260 .fh = NFS_FH(inode),
3261 .dir_fh = NFS_FH(dir),
3262 .name = name,
91ba2eee
TM		 3263 .bitmask = server->attr_bitmask,
3264 };
91ba2eee
TM		 3265 struct nfs4_link_res res = {
3266 .server = server,
1775fd3e 3267 .label = NULL,
1da177e4 3268 };
1da177e4
LT		 3269 struct rpc_message msg = {
3270 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3271 .rpc_argp = &arg,
91ba2eee 3272 .rpc_resp = &res,
1da177e4 3273 };
136f2627
TM		 3274 int status = -ENOMEM;
3275
3276 res.fattr = nfs_alloc_fattr();
778d2817 3277 if (res.fattr == NULL)
136f2627 3278 goto out;
1da177e4 3279
14c43f76
DQ		 3280 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3281 if (IS_ERR(res.label)) {
3282 status = PTR_ERR(res.label);
3283 goto out;
3284 }
3285
7c513058 3286 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3287 if (!status) {
3288 update_changeattr(dir, &res.cinfo);
73a3d07c 3289 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3290 }
14c43f76
DQ		 3291
3292
3293 nfs4_label_free(res.label);
3294
136f2627 3295out:
136f2627 3296 nfs_free_fattr(res.fattr);
1da177e4
LT		 3297 return status;
3298}
3299
3300static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3301{
3302 struct nfs4_exception exception = { };
3303 int err;
3304 do {
3305 err = nfs4_handle_exception(NFS_SERVER(inode),
3306 _nfs4_proc_link(inode, dir, name),
3307 &exception);
3308 } while (exception.retry);
3309 return err;
3310}
3311
57dc9a57
TM		 3312struct nfs4_createdata {
3313 struct rpc_message msg;
3314 struct nfs4_create_arg arg;
3315 struct nfs4_create_res res;
3316 struct nfs_fh fh;
3317 struct nfs_fattr fattr;
1775fd3e 3318 struct nfs4_label *label;
57dc9a57
TM		 3319};
3320
3321static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3322 struct qstr *name, struct iattr *sattr, u32 ftype)
3323{
3324 struct nfs4_createdata *data;
3325
3326 data = kzalloc(sizeof(*data), GFP_KERNEL);
3327 if (data != NULL) {
3328 struct nfs_server *server = NFS_SERVER(dir);
3329
14c43f76
DQ		 3330 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3331 if (IS_ERR(data->label))
3332 goto out_free;
3333
57dc9a57
TM		 3334 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3335 data->msg.rpc_argp = &data->arg;
3336 data->msg.rpc_resp = &data->res;
3337 data->arg.dir_fh = NFS_FH(dir);
3338 data->arg.server = server;
3339 data->arg.name = name;
3340 data->arg.attrs = sattr;
3341 data->arg.ftype = ftype;
3342 data->arg.bitmask = server->attr_bitmask;
3343 data->res.server = server;
3344 data->res.fh = &data->fh;
3345 data->res.fattr = &data->fattr;
1775fd3e 3346 data->res.label = data->label;
57dc9a57 3347 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3348 }
3349 return data;
14c43f76
DQ		 3350out_free:
3351 kfree(data);
3352 return NULL;
57dc9a57
TM		 3353}
3354
3355static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3356{
7c513058 3357 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3358 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3359 if (status == 0) {
3360 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3361 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3362 }
3363 return status;
3364}
3365
3366static void nfs4_free_createdata(struct nfs4_createdata *data)
3367{
14c43f76 3368 nfs4_label_free(data->label);
57dc9a57
TM		 3369 kfree(data);
3370}
3371
4f390c15 3372static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3373 struct page *page, unsigned int len, struct iattr *sattr,
3374 struct nfs4_label *label)
1da177e4 3375{
57dc9a57
TM		 3376 struct nfs4_createdata *data;
3377 int status = -ENAMETOOLONG;
1da177e4 3378
94a6d753 3379 if (len > NFS4_MAXPATHLEN)
57dc9a57 3380 goto out;
4f390c15 3381
57dc9a57
TM		 3382 status = -ENOMEM;
3383 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3384 if (data == NULL)
3385 goto out;
3386
3387 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3388 data->arg.u.symlink.pages = &page;
3389 data->arg.u.symlink.len = len;
1775fd3e 3390 data->arg.label = label;
1da177e4 3391
57dc9a57
TM		 3392 status = nfs4_do_create(dir, dentry, data);
3393
3394 nfs4_free_createdata(data);
3395out:
1da177e4
LT		 3396 return status;
3397}
3398
4f390c15 3399static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3400 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3401{
3402 struct nfs4_exception exception = { };
1775fd3e 3403 struct nfs4_label *label = NULL;
1da177e4
LT		 3404 int err;
3405 do {
3406 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753 3407 _nfs4_proc_symlink(dir, dentry, page,
1775fd3e 3408 len, sattr, label),
1da177e4
LT		 3409 &exception);
3410 } while (exception.retry);
3411 return err;
3412}
3413
3414static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3415 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3416{
57dc9a57
TM		 3417 struct nfs4_createdata *data;
3418 int status = -ENOMEM;
1da177e4 3419
57dc9a57
TM		 3420 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3421 if (data == NULL)
3422 goto out;
3423
1775fd3e 3424 data->arg.label = label;
57dc9a57
TM		 3425 status = nfs4_do_create(dir, dentry, data);
3426
3427 nfs4_free_createdata(data);
3428out:
1da177e4
LT		 3429 return status;
3430}
3431
3432static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3433 struct iattr *sattr)
3434{
3435 struct nfs4_exception exception = { };
1775fd3e 3436 struct nfs4_label *label = NULL;
1da177e4 3437 int err;
a8a5da99
AK		 3438
3439 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3440 do {
3441 err = nfs4_handle_exception(NFS_SERVER(dir),
1775fd3e 3442 _nfs4_proc_mkdir(dir, dentry, sattr, label),
1da177e4
LT		 3443 &exception);
3444 } while (exception.retry);
3445 return err;
3446}
3447
3448static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3449 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3450{
3451 struct inode *dir = dentry->d_inode;
3452 struct nfs4_readdir_arg args = {
3453 .fh = NFS_FH(dir),
56e4ebf8 3454 .pages = pages,
1da177e4
LT		 3455 .pgbase = 0,
3456 .count = count,
96d25e53 3457 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3458 .plus = plus,
1da177e4
LT		 3459 };
3460 struct nfs4_readdir_res res;
3461 struct rpc_message msg = {
3462 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3463 .rpc_argp = &args,
3464 .rpc_resp = &res,
3465 .rpc_cred = cred,
3466 };
3467 int status;
3468
3110ff80 3469 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3470 dentry->d_parent->d_name.name,
3471 dentry->d_name.name,
3472 (unsigned long long)cookie);
c3f52af3 3473 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3474 res.pgbase = args.pgbase;
7c513058 3475 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3476 if (status >= 0) {
c3f52af3 3477 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3478 status += args.pgbase;
3479 }
c4812998
TM		 3480
3481 nfs_invalidate_atime(dir);
3482
3110ff80 3483 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3484 return status;
3485}
3486
3487static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3488 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3489{
3490 struct nfs4_exception exception = { };
3491 int err;
3492 do {
3493 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3494 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3495 pages, count, plus),
1da177e4
LT		 3496 &exception);
3497 } while (exception.retry);
3498 return err;
3499}
3500
3501static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3502 struct iattr *sattr, dev_t rdev)
3503{
57dc9a57
TM		 3504 struct nfs4_createdata *data;
3505 int mode = sattr->ia_mode;
3506 int status = -ENOMEM;
1da177e4 3507
57dc9a57
TM		 3508 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3509 if (data == NULL)
3510 goto out;
3511
1da177e4 3512 if (S_ISFIFO(mode))
57dc9a57 3513 data->arg.ftype = NF4FIFO;
1da177e4 3514 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3515 data->arg.ftype = NF4BLK;
3516 data->arg.u.device.specdata1 = MAJOR(rdev);
3517 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3518 }
3519 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3520 data->arg.ftype = NF4CHR;
3521 data->arg.u.device.specdata1 = MAJOR(rdev);
3522 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3523 } else if (!S_ISSOCK(mode)) {
3524 status = -EINVAL;
3525 goto out_free;
1da177e4 3526 }
1775fd3e 3527
57dc9a57 3528 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3529out_free:
57dc9a57
TM		 3530 nfs4_free_createdata(data);
3531out:
1da177e4
LT		 3532 return status;
3533}
3534
3535static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3536 struct iattr *sattr, dev_t rdev)
3537{
3538 struct nfs4_exception exception = { };
3539 int err;
a8a5da99
AK		 3540
3541 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3542 do {
3543 err = nfs4_handle_exception(NFS_SERVER(dir),
3544 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3545 &exception);
3546 } while (exception.retry);
3547 return err;
3548}
3549
3550static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3551 struct nfs_fsstat *fsstat)
3552{
3553 struct nfs4_statfs_arg args = {
3554 .fh = fhandle,
3555 .bitmask = server->attr_bitmask,
3556 };
24ad148a
BH		 3557 struct nfs4_statfs_res res = {
3558 .fsstat = fsstat,
3559 };
1da177e4
LT		 3560 struct rpc_message msg = {
3561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3562 .rpc_argp = &args,
24ad148a 3563 .rpc_resp = &res,
1da177e4
LT		 3564 };
3565
0e574af1 3566 nfs_fattr_init(fsstat->fattr);
7c513058 3567 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3568}
3569
3570static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3571{
3572 struct nfs4_exception exception = { };
3573 int err;
3574 do {
3575 err = nfs4_handle_exception(server,
3576 _nfs4_proc_statfs(server, fhandle, fsstat),
3577 &exception);
3578 } while (exception.retry);
3579 return err;
3580}
3581
3582static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3583 struct nfs_fsinfo *fsinfo)
3584{
3585 struct nfs4_fsinfo_arg args = {
3586 .fh = fhandle,
3587 .bitmask = server->attr_bitmask,
3588 };
3dda5e43
BH		 3589 struct nfs4_fsinfo_res res = {
3590 .fsinfo = fsinfo,
3591 };
1da177e4
LT		 3592 struct rpc_message msg = {
3593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3594 .rpc_argp = &args,
3dda5e43 3595 .rpc_resp = &res,
1da177e4
LT		 3596 };
3597
7c513058 3598 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3599}
3600
3601static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3602{
3603 struct nfs4_exception exception = { };
83ca7f5a 3604 unsigned long now = jiffies;
1da177e4
LT		 3605 int err;
3606
3607 do {
83ca7f5a
CL		 3608 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3609 if (err == 0) {
3610 struct nfs_client *clp = server->nfs_client;
3611
3612 spin_lock(&clp->cl_lock);
3613 clp->cl_lease_time = fsinfo->lease_time * HZ;
3614 clp->cl_last_renewal = now;
3615 spin_unlock(&clp->cl_lock);
3616 break;
3617 }
3618 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3619 } while (exception.retry);
3620 return err;
3621}
3622
3623static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3624{
e38eb650
BS		 3625 int error;
3626
0e574af1 3627 nfs_fattr_init(fsinfo->fattr);
e38eb650 3628 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3629 if (error == 0) {
3630 /* block layout checks this! */
3631 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3632 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3633 }
e38eb650
BS		 3634
3635 return error;
1da177e4
LT		 3636}
3637
3638static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3639 struct nfs_pathconf *pathconf)
3640{
3641 struct nfs4_pathconf_arg args = {
3642 .fh = fhandle,
3643 .bitmask = server->attr_bitmask,
3644 };
d45b2989
BH		 3645 struct nfs4_pathconf_res res = {
3646 .pathconf = pathconf,
3647 };
1da177e4
LT		 3648 struct rpc_message msg = {
3649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3650 .rpc_argp = &args,
d45b2989 3651 .rpc_resp = &res,
1da177e4
LT		 3652 };
3653
3654 /* None of the pathconf attributes are mandatory to implement */
3655 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3656 memset(pathconf, 0, sizeof(*pathconf));
3657 return 0;
3658 }
3659
0e574af1 3660 nfs_fattr_init(pathconf->fattr);
7c513058 3661 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3662}
3663
3664static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3665 struct nfs_pathconf *pathconf)
3666{
3667 struct nfs4_exception exception = { };
3668 int err;
3669
3670 do {
3671 err = nfs4_handle_exception(server,
3672 _nfs4_proc_pathconf(server, fhandle, pathconf),
3673 &exception);
3674 } while (exception.retry);
3675 return err;
3676}
3677
5521abfd 3678int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3679 const struct nfs_open_context *ctx,
3680 const struct nfs_lock_context *l_ctx,
3681 fmode_t fmode)
3682{
3683 const struct nfs_lockowner *lockowner = NULL;
3684
3685 if (l_ctx != NULL)
3686 lockowner = &l_ctx->lockowner;
5521abfd 3687 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3688}
3689EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3690
5521abfd
TM		 3691static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3692 const struct nfs_open_context *ctx,
3693 const struct nfs_lock_context *l_ctx,
3694 fmode_t fmode)
3695{
3696 nfs4_stateid current_stateid;
3697
3698 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3699 return false;
3700 return nfs4_stateid_match(stateid, &current_stateid);
3701}
3702
3703static bool nfs4_error_stateid_expired(int err)
3704{
3705 switch (err) {
3706 case -NFS4ERR_DELEG_REVOKED:
3707 case -NFS4ERR_ADMIN_REVOKED:
3708 case -NFS4ERR_BAD_STATEID:
3709 case -NFS4ERR_STALE_STATEID:
3710 case -NFS4ERR_OLD_STATEID:
3711 case -NFS4ERR_OPENMODE:
3712 case -NFS4ERR_EXPIRED:
3713 return true;
3714 }
3715 return false;
3716}
3717
d20581aa
BH		 3718void __nfs4_read_done_cb(struct nfs_read_data *data)
3719{
cd841605 3720 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3721}
3722
cbdabc7f 3723static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3724{
cd841605 3725 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3726
9e33bed5 3727 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3728 rpc_restart_call_prepare(task);
ec06c096 3729 return -EAGAIN;
1da177e4 3730 }
8850df99 3731
d20581aa 3732 __nfs4_read_done_cb(data);
1da177e4 3733 if (task->tk_status > 0)
ec06c096
TM		 3734 renew_lease(server, data->timestamp);
3735 return 0;
1da177e4
LT		 3736}
3737
5521abfd
TM		 3738static bool nfs4_read_stateid_changed(struct rpc_task *task,
3739 struct nfs_readargs *args)
3740{
3741
3742 if (!nfs4_error_stateid_expired(task->tk_status) ||
3743 nfs4_stateid_is_current(&args->stateid,
3744 args->context,
3745 args->lock_context,
3746 FMODE_READ))
3747 return false;
3748 rpc_restart_call_prepare(task);
3749 return true;
3750}
3751
cbdabc7f
AA		 3752static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3753{
3754
3755 dprintk("--> %s\n", __func__);
3756
3757 if (!nfs4_sequence_done(task, &data->res.seq_res))
3758 return -EAGAIN;
5521abfd
TM		 3759 if (nfs4_read_stateid_changed(task, &data->args))
3760 return -EAGAIN;
d20581aa
BH		 3761 return data->read_done_cb ? data->read_done_cb(task, data) :
3762 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3763}
3764
bdc7f021 3765static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3766{
1da177e4 3767 data->timestamp = jiffies;
cbdabc7f 3768 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3769 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3770 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3771}
3772
ea7c3303
BS		 3773static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3774{
9b206149 3775 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3776 &data->args.seq_args,
3777 &data->res.seq_res,
9b206149
TM		 3778 task))
3779 return;
3780 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3781 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3782}
3783
b029bc9b 3784static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3785{
cd841605 3786 struct inode *inode = data->header->inode;
1da177e4 3787
9e33bed5 3788 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3789 rpc_restart_call_prepare(task);
788e7a89 3790 return -EAGAIN;
1da177e4 3791 }
4f9838c7 3792 if (task->tk_status >= 0) {
1da177e4 3793 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3794 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3795 }
788e7a89 3796 return 0;
1da177e4
LT		 3797}
3798
5521abfd
TM		 3799static bool nfs4_write_stateid_changed(struct rpc_task *task,
3800 struct nfs_writeargs *args)
3801{
3802
3803 if (!nfs4_error_stateid_expired(task->tk_status) ||
3804 nfs4_stateid_is_current(&args->stateid,
3805 args->context,
3806 args->lock_context,
3807 FMODE_WRITE))
3808 return false;
3809 rpc_restart_call_prepare(task);
3810 return true;
3811}
3812
b029bc9b
FI		 3813static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3814{
3815 if (!nfs4_sequence_done(task, &data->res.seq_res))
3816 return -EAGAIN;
5521abfd
TM		 3817 if (nfs4_write_stateid_changed(task, &data->args))
3818 return -EAGAIN;
d20581aa
BH		 3819 return data->write_done_cb ? data->write_done_cb(task, data) :
3820 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3821}
3822
5a37f851
TM		 3823static
3824bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3825{
5a37f851
TM		 3826 const struct nfs_pgio_header *hdr = data->header;
3827
3828 /* Don't request attributes for pNFS or O_DIRECT writes */
3829 if (data->ds_clp != NULL || hdr->dreq != NULL)
3830 return false;
3831 /* Otherwise, request attributes if and only if we don't hold
3832 * a delegation
3833 */
011e2a7f 3834 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3835}
a69aef14 3836
bdc7f021 3837static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3838{
cd841605 3839 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3840
5a37f851 3841 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3842 data->args.bitmask = NULL;
3843 data->res.fattr = NULL;
3844 } else
3845 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3846
b029bc9b
FI		 3847 if (!data->write_done_cb)
3848 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3849 data->res.server = server;
1da177e4
LT		 3850 data->timestamp = jiffies;
3851
bdc7f021 3852 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3853 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3854}
3855
c6cb80d0
BS		 3856static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3857{
9b206149 3858 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3859 &data->args.seq_args,
3860 &data->res.seq_res,
9b206149
TM		 3861 task))
3862 return;
3863 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3864 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3865}
3866
0b7c0153 3867static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3868{
d9afbd1b
TM		 3869 nfs4_setup_sequence(NFS_SERVER(data->inode),
3870 &data->args.seq_args,
3871 &data->res.seq_res,
3872 task);
1da177e4
LT		 3873}
3874
0b7c0153 3875static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3876{
1da177e4 3877 struct inode *inode = data->inode;
14516c3a 3878
9e33bed5 3879 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3880 rpc_restart_call_prepare(task);
788e7a89 3881 return -EAGAIN;
1da177e4 3882 }
788e7a89 3883 return 0;
1da177e4
LT		 3884}
3885
0b7c0153 3886static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3887{
3888 if (!nfs4_sequence_done(task, &data->res.seq_res))
3889 return -EAGAIN;
0b7c0153 3890 return data->commit_done_cb(task, data);
5f452431
FI		 3891}
3892
0b7c0153 3893static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3894{
788e7a89 3895 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3896
0b7c0153
FI		 3897 if (data->commit_done_cb == NULL)
3898 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3899 data->res.server = server;
bdc7f021 3900 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3901 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3902}
3903
9bc4e3ca
CL		 3904struct nfs4_renewdata {
3905 struct nfs_client *client;
3906 unsigned long timestamp;
3907};
3908
1da177e4
LT		 3909/*
3910 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3911 * standalone procedure for queueing an asynchronous RENEW.
3912 */
9bc4e3ca 3913static void nfs4_renew_release(void *calldata)
dc96aef9 3914{
9bc4e3ca
CL		 3915 struct nfs4_renewdata *data = calldata;
3916 struct nfs_client *clp = data->client;
dc96aef9 3917
0851de06
AB		 3918 if (atomic_read(&clp->cl_count) > 1)
3919 nfs4_schedule_state_renewal(clp);
3920 nfs_put_client(clp);
9bc4e3ca 3921 kfree(data);
dc96aef9
AB		 3922}
3923
9bc4e3ca 3924static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3925{
9bc4e3ca
CL		 3926 struct nfs4_renewdata *data = calldata;
3927 struct nfs_client *clp = data->client;
3928 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3929
3930 if (task->tk_status < 0) {
95baa25c 3931 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3932 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3933 return;
3934 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3935 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3936 return;
3937 }
3938 nfs4_schedule_path_down_recovery(clp);
1da177e4 3939 }
452e9352 3940 do_renew_lease(clp, timestamp);
1da177e4
LT		 3941}
3942
963d8fe5
TM		 3943static const struct rpc_call_ops nfs4_renew_ops = {
3944 .rpc_call_done = nfs4_renew_done,
dc96aef9 3945 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3946};
3947
2f60ea6b 3948static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3949{
3950 struct rpc_message msg = {
3951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3952 .rpc_argp = clp,
b4454fe1 3953 .rpc_cred = cred,
1da177e4 3954 };
9bc4e3ca 3955 struct nfs4_renewdata *data;
1da177e4 3956
2f60ea6b
TM		 3957 if (renew_flags == 0)
3958 return 0;
0851de06
AB		 3959 if (!atomic_inc_not_zero(&clp->cl_count))
3960 return -EIO;
b569ad34 3961 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3962 if (data == NULL)
3963 return -ENOMEM;
3964 data->client = clp;
3965 data->timestamp = jiffies;
bc7a05ca 3966 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3967 &nfs4_renew_ops, data);
1da177e4
LT		 3968}
3969
8534d4ec 3970static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3971{
3972 struct rpc_message msg = {
3973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3974 .rpc_argp = clp,
b4454fe1 3975 .rpc_cred = cred,
1da177e4
LT		 3976 };
3977 unsigned long now = jiffies;
3978 int status;
3979
bc7a05ca 3980 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3981 if (status < 0)
3982 return status;
452e9352 3983 do_renew_lease(clp, now);
1da177e4
LT		 3984 return 0;
3985}
3986
aa1870af
BF		 3987static inline int nfs4_server_supports_acls(struct nfs_server *server)
3988{
3989 return (server->caps & NFS_CAP_ACLS)
3990 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3991 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3992}
3993
21f498c2
TM		 3994/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3995 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3996 * the stack.
3997 */
21f498c2 3998#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3999
e9e3d724
NH		 4000static int buf_to_pages_noslab(const void *buf, size_t buflen,
4001 struct page **pages, unsigned int *pgbase)
4002{
4003 struct page *newpage, **spages;
4004 int rc = 0;
4005 size_t len;
4006 spages = pages;
4007
4008 do {
21f498c2 4009 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4010 newpage = alloc_page(GFP_KERNEL);
4011
4012 if (newpage == NULL)
4013 goto unwind;
4014 memcpy(page_address(newpage), buf, len);
4015 buf += len;
4016 buflen -= len;
4017 *pages++ = newpage;
4018 rc++;
4019 } while (buflen != 0);
4020
4021 return rc;
4022
4023unwind:
4024 for(; rc > 0; rc--)
4025 __free_page(spages[rc-1]);
4026 return -ENOMEM;
4027}
4028
e50a1c2e
BF		 4029struct nfs4_cached_acl {
4030 int cached;
4031 size_t len;
3e9d4154 4032 char data[0];
e50a1c2e
BF		 4033};
4034
4035static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4036{
4037 struct nfs_inode *nfsi = NFS_I(inode);
4038
4039 spin_lock(&inode->i_lock);
4040 kfree(nfsi->nfs4_acl);
4041 nfsi->nfs4_acl = acl;
4042 spin_unlock(&inode->i_lock);
4043}
4044
4045static void nfs4_zap_acl_attr(struct inode *inode)
4046{
4047 nfs4_set_cached_acl(inode, NULL);
4048}
4049
4050static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4051{
4052 struct nfs_inode *nfsi = NFS_I(inode);
4053 struct nfs4_cached_acl *acl;
4054 int ret = -ENOENT;
4055
4056 spin_lock(&inode->i_lock);
4057 acl = nfsi->nfs4_acl;
4058 if (acl == NULL)
4059 goto out;
4060 if (buf == NULL) /* user is just asking for length */
4061 goto out_len;
4062 if (acl->cached == 0)
4063 goto out;
4064 ret = -ERANGE; /* see getxattr(2) man page */
4065 if (acl->len > buflen)
4066 goto out;
4067 memcpy(buf, acl->data, acl->len);
4068out_len:
4069 ret = acl->len;
4070out:
4071 spin_unlock(&inode->i_lock);
4072 return ret;
4073}
4074
5794d21e 4075static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4076{
4077 struct nfs4_cached_acl *acl;
b291f1b1 4078 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4079
1f1ea6c2 4080 if (buflen <= PAGE_SIZE) {
b291f1b1 4081 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4082 if (acl == NULL)
4083 goto out;
4084 acl->cached = 1;
5794d21e 4085 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4086 } else {
4087 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4088 if (acl == NULL)
4089 goto out;
4090 acl->cached = 0;
4091 }
4092 acl->len = acl_len;
4093out:
4094 nfs4_set_cached_acl(inode, acl);
4095}
4096
bf118a34
AA		 4097/*
4098 * The getxattr API returns the required buffer length when called with a
4099 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4100 * the required buf. On a NULL buf, we send a page of data to the server
4101 * guessing that the ACL request can be serviced by a page. If so, we cache
4102 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4103 * the cache. If not so, we throw away the page, and cache the required
4104 * length. The next getxattr call will then produce another round trip to
4105 * the server, this time with the input buf of the required size.
4106 */
16b4289c 4107static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4108{
bf118a34 4109 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4110 struct nfs_getaclargs args = {
4111 .fh = NFS_FH(inode),
4112 .acl_pages = pages,
4113 .acl_len = buflen,
4114 };
663c79b3
BH		 4115 struct nfs_getaclres res = {
4116 .acl_len = buflen,
4117 };
aa1870af
BF		 4118 struct rpc_message msg = {
4119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4120 .rpc_argp = &args,
663c79b3 4121 .rpc_resp = &res,
aa1870af 4122 };
21f498c2
TM		 4123 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4124 int ret = -ENOMEM, i;
aa1870af 4125
bf118a34
AA		 4126 /* As long as we're doing a round trip to the server anyway,
4127 * let's be prepared for a page of acl data. */
4128 if (npages == 0)
4129 npages = 1;
21f498c2
TM		 4130 if (npages > ARRAY_SIZE(pages))
4131 return -ERANGE;
5a006899 4132
bf118a34
AA		 4133 for (i = 0; i < npages; i++) {
4134 pages[i] = alloc_page(GFP_KERNEL);
4135 if (!pages[i])
4136 goto out_free;
e50a1c2e 4137 }
5a006899
SP		 4138
4139 /* for decoding across pages */
4140 res.acl_scratch = alloc_page(GFP_KERNEL);
4141 if (!res.acl_scratch)
4142 goto out_free;
4143
bf118a34
AA		 4144 args.acl_len = npages * PAGE_SIZE;
4145 args.acl_pgbase = 0;
5a006899 4146
de040bec 4147 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4148 __func__, buf, buflen, npages, args.acl_len);
4149 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4150 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4151 if (ret)
4152 goto out_free;
bf118a34 4153
1f1ea6c2
TM		 4154 /* Handle the case where the passed-in buffer is too short */
4155 if (res.acl_flags & NFS4_ACL_TRUNC) {
4156 /* Did the user only issue a request for the acl length? */
4157 if (buf == NULL)
4158 goto out_ok;
e50a1c2e 4159 ret = -ERANGE;
1f1ea6c2 4160 goto out_free;
e50a1c2e 4161 }
1f1ea6c2 4162 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4163 if (buf) {
4164 if (res.acl_len > buflen) {
4165 ret = -ERANGE;
4166 goto out_free;
4167 }
1f1ea6c2 4168 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4169 }
1f1ea6c2
TM		 4170out_ok:
4171 ret = res.acl_len;
e50a1c2e 4172out_free:
bf118a34
AA		 4173 for (i = 0; i < npages; i++)
4174 if (pages[i])
4175 __free_page(pages[i]);
331818f1
TM		 4176 if (res.acl_scratch)
4177 __free_page(res.acl_scratch);
aa1870af
BF		 4178 return ret;
4179}
4180
16b4289c
TM		 4181static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4182{
4183 struct nfs4_exception exception = { };
4184 ssize_t ret;
4185 do {
4186 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4187 if (ret >= 0)
4188 break;
4189 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4190 } while (exception.retry);
4191 return ret;
4192}
4193
e50a1c2e
BF		 4194static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4195{
4196 struct nfs_server *server = NFS_SERVER(inode);
4197 int ret;
4198
4199 if (!nfs4_server_supports_acls(server))
4200 return -EOPNOTSUPP;
4201 ret = nfs_revalidate_inode(server, inode);
4202 if (ret < 0)
4203 return ret;
08a22b39
AK		 4204 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4205 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4206 ret = nfs4_read_cached_acl(inode, buf, buflen);
4207 if (ret != -ENOENT)
bf118a34
AA		 4208 /* -ENOENT is returned if there is no ACL or if there is an ACL
4209 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4210 return ret;
4211 return nfs4_get_acl_uncached(inode, buf, buflen);
4212}
4213
16b4289c 4214static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4215{
4216 struct nfs_server *server = NFS_SERVER(inode);
4217 struct page *pages[NFS4ACL_MAXPAGES];
4218 struct nfs_setaclargs arg = {
4219 .fh = NFS_FH(inode),
4220 .acl_pages = pages,
4221 .acl_len = buflen,
4222 };
73c403a9 4223 struct nfs_setaclres res;
4b580ee3
BF		 4224 struct rpc_message msg = {
4225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4226 .rpc_argp = &arg,
73c403a9 4227 .rpc_resp = &res,
4b580ee3 4228 };
21f498c2 4229 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4230 int ret, i;
4b580ee3
BF		 4231
4232 if (!nfs4_server_supports_acls(server))
4233 return -EOPNOTSUPP;
21f498c2
TM		 4234 if (npages > ARRAY_SIZE(pages))
4235 return -ERANGE;
e9e3d724
NH		 4236 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4237 if (i < 0)
4238 return i;
57ec14c5 4239 nfs4_inode_return_delegation(inode);
7c513058 4240 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4241
4242 /*
4243 * Free each page after tx, so the only ref left is
4244 * held by the network stack
4245 */
4246 for (; i > 0; i--)
4247 put_page(pages[i-1]);
4248
08a22b39
AK		 4249 /*
4250 * Acl update can result in inode attribute update.
4251 * so mark the attribute cache invalid.
4252 */
4253 spin_lock(&inode->i_lock);
4254 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4255 spin_unlock(&inode->i_lock);
f41f7418
TM		 4256 nfs_access_zap_cache(inode);
4257 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4258 return ret;
4259}
4260
16b4289c
TM		 4261static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4262{
4263 struct nfs4_exception exception = { };
4264 int err;
4265 do {
4266 err = nfs4_handle_exception(NFS_SERVER(inode),
4267 __nfs4_proc_set_acl(inode, buf, buflen),
4268 &exception);
4269 } while (exception.retry);
4270 return err;
4271}
4272
1da177e4 4273static int
aa5190d0 4274nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4275{
aa5190d0
TM		 4276 struct nfs_client *clp = server->nfs_client;
4277
4278 if (task->tk_status >= 0)
1da177e4
LT		 4279 return 0;
4280 switch(task->tk_status) {
a1d0b5ee 4281 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4282 case -NFS4ERR_ADMIN_REVOKED:
4283 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4284 if (state == NULL)
4285 break;
4286 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4287 case -NFS4ERR_OPENMODE:
4288 if (state == NULL)
4289 break;
5d422301
TM		 4290 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4291 goto stateid_invalid;
0400a6b0 4292 goto wait_on_recovery;
0ced63d1 4293 case -NFS4ERR_EXPIRED:
5d422301
TM		 4294 if (state != NULL) {
4295 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4296 goto stateid_invalid;
4297 }
1da177e4 4298 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4299 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4300 nfs4_schedule_lease_recovery(clp);
4301 goto wait_on_recovery;
4745e315
AA		 4302#if defined(CONFIG_NFS_V4_1)
4303 case -NFS4ERR_BADSESSION:
4304 case -NFS4ERR_BADSLOT:
4305 case -NFS4ERR_BAD_HIGH_SLOT:
4306 case -NFS4ERR_DEADSESSION:
4307 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4308 case -NFS4ERR_SEQ_FALSE_RETRY:
4309 case -NFS4ERR_SEQ_MISORDERED:
4310 dprintk("%s ERROR %d, Reset session\n", __func__,
4311 task->tk_status);
9f594791 4312 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4313 task->tk_status = 0;
4314 return -EAGAIN;
4315#endif /* CONFIG_NFS_V4_1 */
1da177e4 4316 case -NFS4ERR_DELAY:
aa5190d0 4317 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4318 case -NFS4ERR_GRACE:
1da177e4
LT		 4319 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4320 task->tk_status = 0;
4321 return -EAGAIN;
a8a4ae3a 4322 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4323 case -NFS4ERR_OLD_STATEID:
4324 task->tk_status = 0;
4325 return -EAGAIN;
4326 }
4327 task->tk_status = nfs4_map_errors(task->tk_status);
4328 return 0;
5d422301
TM		 4329stateid_invalid:
4330 task->tk_status = -EIO;
4331 return 0;
0400a6b0 4332wait_on_recovery:
a2c0b9e2 4333 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4334 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4335 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4336 task->tk_status = 0;
4337 return -EAGAIN;
1da177e4
LT		 4338}
4339
f092075d
CL		 4340static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4341 nfs4_verifier *bootverf)
cd93710e
CL		 4342{
4343 __be32 verf[2];
4344
2c820d9a
CL		 4345 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4346 /* An impossible timestamp guarantees this value
4347 * will never match a generated boot time. */
4348 verf[0] = 0;
4349 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4350 } else {
f092075d
CL		 4351 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4352 verf[0] = (__be32)nn->boot_time.tv_sec;
4353 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4354 }
cd93710e
CL		 4355 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4356}
4357
e984a55a
CL		 4358static unsigned int
4359nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4360 char *buf, size_t len)
4361{
4362 unsigned int result;
4363
4364 rcu_read_lock();
4365 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4366 clp->cl_ipaddr,
4367 rpc_peeraddr2str(clp->cl_rpcclient,
4368 RPC_DISPLAY_ADDR),
4369 rpc_peeraddr2str(clp->cl_rpcclient,
4370 RPC_DISPLAY_PROTO));
4371 rcu_read_unlock();
4372 return result;
4373}
4374
4375static unsigned int
4376nfs4_init_uniform_client_string(const struct nfs_client *clp,
4377 char *buf, size_t len)
4378{
6f2ea7f2
CL		 4379 char *nodename = clp->cl_rpcclient->cl_nodename;
4380
4381 if (nfs4_client_id_uniquifier[0] != '\0')
4382 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4383 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4384 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4385 nodename);
e984a55a
CL		 4386}
4387
6bbb4ae8
CL		 4388/**
4389 * nfs4_proc_setclientid - Negotiate client ID
4390 * @clp: state data structure
4391 * @program: RPC program for NFSv4 callback service
4392 * @port: IP port number for NFS4 callback service
4393 * @cred: RPC credential to use for this call
4394 * @res: where to place the result
4395 *
4396 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4397 */
bb8b27e5
TM		 4398int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4399 unsigned short port, struct rpc_cred *cred,
4400 struct nfs4_setclientid_res *res)
1da177e4
LT		 4401{
4402 nfs4_verifier sc_verifier;
4403 struct nfs4_setclientid setclientid = {
4404 .sc_verifier = &sc_verifier,
4405 .sc_prog = program,
f4eecd5d 4406 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4407 };
4408 struct rpc_message msg = {
4409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4410 .rpc_argp = &setclientid,
bb8b27e5 4411 .rpc_resp = res,
286d7d6a 4412 .rpc_cred = cred,
1da177e4 4413 };
6bbb4ae8 4414 int status;
1da177e4 4415
de734831 4416 /* nfs_client_id4 */
f092075d 4417 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4418 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4419 setclientid.sc_name_len =
4420 nfs4_init_uniform_client_string(clp,
4421 setclientid.sc_name,
4422 sizeof(setclientid.sc_name));
4423 else
4424 setclientid.sc_name_len =
4425 nfs4_init_nonuniform_client_string(clp,
4426 setclientid.sc_name,
4427 sizeof(setclientid.sc_name));
de734831 4428 /* cb_client4 */
e984a55a 4429 rcu_read_lock();
de734831 4430 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4431 sizeof(setclientid.sc_netid),
4432 rpc_peeraddr2str(clp->cl_rpcclient,
4433 RPC_DISPLAY_NETID));
de734831
CL		 4434 rcu_read_unlock();
4435 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4436 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4437 clp->cl_ipaddr, port >> 8, port & 255);
4438
6bbb4ae8
CL		 4439 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4440 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4441 setclientid.sc_name_len, setclientid.sc_name);
4442 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4443 dprintk("NFS reply setclientid: %d\n", status);
4444 return status;
1da177e4
LT		 4445}
4446
6bbb4ae8
CL		 4447/**
4448 * nfs4_proc_setclientid_confirm - Confirm client ID
4449 * @clp: state data structure
4450 * @res: result of a previous SETCLIENTID
4451 * @cred: RPC credential to use for this call
4452 *
4453 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4454 */
fd954ae1 4455int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4456 struct nfs4_setclientid_res *arg,
4457 struct rpc_cred *cred)
1da177e4 4458{
1da177e4
LT		 4459 struct rpc_message msg = {
4460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4461 .rpc_argp = arg,
286d7d6a 4462 .rpc_cred = cred,
1da177e4 4463 };
1da177e4
LT		 4464 int status;
4465
6bbb4ae8
CL		 4466 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4467 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4468 clp->cl_clientid);
1bd714f2 4469 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4470 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4471 return status;
4472}
4473
fe650407
TM		 4474struct nfs4_delegreturndata {
4475 struct nfs4_delegreturnargs args;
fa178f29 4476 struct nfs4_delegreturnres res;
fe650407
TM		 4477 struct nfs_fh fh;
4478 nfs4_stateid stateid;
26e976a8 4479 unsigned long timestamp;
fa178f29 4480 struct nfs_fattr fattr;
fe650407
TM		 4481 int rpc_status;
4482};
4483
fe650407
TM		 4484static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4485{
4486 struct nfs4_delegreturndata *data = calldata;
938e1010 4487
14516c3a
TM		 4488 if (!nfs4_sequence_done(task, &data->res.seq_res))
4489 return;
938e1010 4490
79708861
RL		 4491 switch (task->tk_status) {
4492 case -NFS4ERR_STALE_STATEID:
4493 case -NFS4ERR_EXPIRED:
4494 case 0:
fa178f29 4495 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4496 break;
4497 default:
4498 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4499 -EAGAIN) {
d00c5d43 4500 rpc_restart_call_prepare(task);
79708861
RL		 4501 return;
4502 }
4503 }
4504 data->rpc_status = task->tk_status;
fe650407
TM		 4505}
4506
4507static void nfs4_delegreturn_release(void *calldata)
4508{
fe650407
TM		 4509 kfree(calldata);
4510}
4511
938e1010
AA		 4512#if defined(CONFIG_NFS_V4_1)
4513static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4514{
4515 struct nfs4_delegreturndata *d_data;
4516
4517 d_data = (struct nfs4_delegreturndata *)data;
4518
d9afbd1b
TM		 4519 nfs4_setup_sequence(d_data->res.server,
4520 &d_data->args.seq_args,
4521 &d_data->res.seq_res,
4522 task);
938e1010
AA		 4523}
4524#endif /* CONFIG_NFS_V4_1 */
4525
c8d149f3 4526static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4527#if defined(CONFIG_NFS_V4_1)
4528 .rpc_call_prepare = nfs4_delegreturn_prepare,
4529#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4530 .rpc_call_done = nfs4_delegreturn_done,
4531 .rpc_release = nfs4_delegreturn_release,
4532};
4533
e6f81075 4534static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4535{
4536 struct nfs4_delegreturndata *data;
fa178f29 4537 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4538 struct rpc_task *task;
5138fde0
TM		 4539 struct rpc_message msg = {
4540 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4541 .rpc_cred = cred,
4542 };
c970aa85
TM		 4543 struct rpc_task_setup task_setup_data = {
4544 .rpc_client = server->client,
5138fde0 4545 .rpc_message = &msg,
c970aa85
TM		 4546 .callback_ops = &nfs4_delegreturn_ops,
4547 .flags = RPC_TASK_ASYNC,
4548 };
e6f81075 4549 int status = 0;
fe650407 4550
8535b2be 4551 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4552 if (data == NULL)
4553 return -ENOMEM;
9d12b216 4554 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4555 data->args.fhandle = &data->fh;
4556 data->args.stateid = &data->stateid;
9e907fec 4557 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4558 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4559 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4560 data->res.fattr = &data->fattr;
4561 data->res.server = server;
5138fde0 4562 nfs_fattr_init(data->res.fattr);
26e976a8 4563 data->timestamp = jiffies;
fe650407
TM		 4564 data->rpc_status = 0;
4565
c970aa85 4566 task_setup_data.callback_data = data;
1174dd1f
TM		 4567 msg.rpc_argp = &data->args;
4568 msg.rpc_resp = &data->res;
c970aa85 4569 task = rpc_run_task(&task_setup_data);
7a1218a2 4570 if (IS_ERR(task))
fe650407 4571 return PTR_ERR(task);
e6f81075
TM		 4572 if (!issync)
4573 goto out;
fe650407 4574 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4575 if (status != 0)
4576 goto out;
4577 status = data->rpc_status;
e144cbcc
TM		 4578 if (status == 0)
4579 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4580 else
4581 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4582out:
e6b3c4db 4583 rpc_put_task(task);
fe650407 4584 return status;
1da177e4
LT		 4585}
4586
e6f81075 4587int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4588{
4589 struct nfs_server *server = NFS_SERVER(inode);
4590 struct nfs4_exception exception = { };
4591 int err;
4592 do {
e6f81075 4593 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4594 switch (err) {
4595 case -NFS4ERR_STALE_STATEID:
4596 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4597 case 0:
4598 return 0;
4599 }
4600 err = nfs4_handle_exception(server, err, &exception);
4601 } while (exception.retry);
4602 return err;
4603}
4604
4605#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4606#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4607
4608/*
4609 * sleep, with exponential backoff, and retry the LOCK operation.
4610 */
4611static unsigned long
4612nfs4_set_lock_task_retry(unsigned long timeout)
4613{
d310310c 4614 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4615 timeout <<= 1;
4616 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4617 return NFS4_LOCK_MAXTIMEOUT;
4618 return timeout;
4619}
4620
1da177e4
LT		 4621static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4622{
4623 struct inode *inode = state->inode;
4624 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4625 struct nfs_client *clp = server->nfs_client;
911d1aaf 4626 struct nfs_lockt_args arg = {
1da177e4 4627 .fh = NFS_FH(inode),
911d1aaf 4628 .fl = request,
1da177e4 4629 };
911d1aaf
TM		 4630 struct nfs_lockt_res res = {
4631 .denied = request,
1da177e4
LT		 4632 };
4633 struct rpc_message msg = {
4634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4635 .rpc_argp = &arg,
4636 .rpc_resp = &res,
4637 .rpc_cred = state->owner->so_cred,
4638 };
1da177e4
LT		 4639 struct nfs4_lock_state *lsp;
4640 int status;
4641
911d1aaf 4642 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4643 status = nfs4_set_lock_state(state, request);
4644 if (status != 0)
4645 goto out;
4646 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4647 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4648 arg.lock_owner.s_dev = server->s_dev;
7c513058 4649 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4650 switch (status) {
4651 case 0:
4652 request->fl_type = F_UNLCK;
4653 break;
4654 case -NFS4ERR_DENIED:
4655 status = 0;
1da177e4 4656 }
70cc6487 4657 request->fl_ops->fl_release_private(request);
8d0a8a9d 4658out:
1da177e4
LT		 4659 return status;
4660}
4661
4662static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4663{
4664 struct nfs4_exception exception = { };
4665 int err;
4666
4667 do {
4668 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4669 _nfs4_proc_getlk(state, cmd, request),
4670 &exception);
4671 } while (exception.retry);
4672 return err;
4673}
4674
4675static int do_vfs_lock(struct file *file, struct file_lock *fl)
4676{
4677 int res = 0;
4678 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4679 case FL_POSIX:
4680 res = posix_lock_file_wait(file, fl);
4681 break;
4682 case FL_FLOCK:
4683 res = flock_lock_file_wait(file, fl);
4684 break;
4685 default:
4686 BUG();
4687 }
1da177e4
LT		 4688 return res;
4689}
4690
faf5f49c 4691struct nfs4_unlockdata {
911d1aaf
TM		 4692 struct nfs_locku_args arg;
4693 struct nfs_locku_res res;
faf5f49c
TM		 4694 struct nfs4_lock_state *lsp;
4695 struct nfs_open_context *ctx;
911d1aaf
TM		 4696 struct file_lock fl;
4697 const struct nfs_server *server;
26e976a8 4698 unsigned long timestamp;
faf5f49c
TM		 4699};
4700
911d1aaf
TM		 4701static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4702 struct nfs_open_context *ctx,
4703 struct nfs4_lock_state *lsp,
4704 struct nfs_seqid *seqid)
4705{
4706 struct nfs4_unlockdata *p;
4707 struct inode *inode = lsp->ls_state->inode;
4708
8535b2be 4709 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4710 if (p == NULL)
4711 return NULL;
4712 p->arg.fh = NFS_FH(inode);
4713 p->arg.fl = &p->fl;
4714 p->arg.seqid = seqid;
c1d51931 4715 p->res.seqid = seqid;
911d1aaf
TM		 4716 p->arg.stateid = &lsp->ls_stateid;
4717 p->lsp = lsp;
4718 atomic_inc(&lsp->ls_count);
4719 /* Ensure we don't close file until we're done freeing locks! */
4720 p->ctx = get_nfs_open_context(ctx);
4721 memcpy(&p->fl, fl, sizeof(p->fl));
4722 p->server = NFS_SERVER(inode);
4723 return p;
4724}
4725
06f814a3 4726static void nfs4_locku_release_calldata(void *data)
faf5f49c 4727{
963d8fe5 4728 struct nfs4_unlockdata *calldata = data;
911d1aaf 4729 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4730 nfs4_put_lock_state(calldata->lsp);
4731 put_nfs_open_context(calldata->ctx);
4732 kfree(calldata);
faf5f49c
TM		 4733}
4734
963d8fe5 4735static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4736{
963d8fe5 4737 struct nfs4_unlockdata *calldata = data;
faf5f49c 4738
14516c3a
TM		 4739 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4740 return;
faf5f49c
TM		 4741 switch (task->tk_status) {
4742 case 0:
f597c537
TM		 4743 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4744 &calldata->res.stateid);
26e976a8 4745 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4746 break;
9e33bed5
TM		 4747 case -NFS4ERR_BAD_STATEID:
4748 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4749 case -NFS4ERR_STALE_STATEID:
4750 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4751 break;
4752 default:
9e33bed5 4753 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4754 rpc_restart_call_prepare(task);
faf5f49c 4755 }
2b1bc308 4756 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4757}
4758
4ce70ada 4759static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4760{
4ce70ada 4761 struct nfs4_unlockdata *calldata = data;
faf5f49c 4762
911d1aaf 4763 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4764 goto out_wait;
795a88c9 4765 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4766 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4767 goto out_no_action;
faf5f49c 4768 }
26e976a8 4769 calldata->timestamp = jiffies;
035168ab 4770 if (nfs4_setup_sequence(calldata->server,
a893693c 4771 &calldata->arg.seq_args,
2240a9e2
TM		 4772 &calldata->res.seq_res,
4773 task) != 0)
4774 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4775 return;
4776out_no_action:
4777 task->tk_action = NULL;
4778out_wait:
4779 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4780}
4781
963d8fe5 4782static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4783 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4784 .rpc_call_done = nfs4_locku_done,
06f814a3 4785 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4786};
4787
a5d16a4d
TM		 4788static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4789 struct nfs_open_context *ctx,
4790 struct nfs4_lock_state *lsp,
4791 struct nfs_seqid *seqid)
4792{
4793 struct nfs4_unlockdata *data;
5138fde0
TM		 4794 struct rpc_message msg = {
4795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4796 .rpc_cred = ctx->cred,
4797 };
c970aa85
TM		 4798 struct rpc_task_setup task_setup_data = {
4799 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4800 .rpc_message = &msg,
c970aa85 4801 .callback_ops = &nfs4_locku_ops,
101070ca 4802 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4803 .flags = RPC_TASK_ASYNC,
4804 };
a5d16a4d 4805
137d6aca
FF		 4806 /* Ensure this is an unlock - when canceling a lock, the
4807 * canceled lock is passed in, and it won't be an unlock.
4808 */
4809 fl->fl_type = F_UNLCK;
4810
a5d16a4d
TM		 4811 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4812 if (data == NULL) {
4813 nfs_free_seqid(seqid);
4814 return ERR_PTR(-ENOMEM);
4815 }
4816
9d12b216 4817 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4818 msg.rpc_argp = &data->arg;
4819 msg.rpc_resp = &data->res;
c970aa85
TM		 4820 task_setup_data.callback_data = data;
4821 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4822}
4823
faf5f49c
TM		 4824static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4825{
65b62a29
TM		 4826 struct inode *inode = state->inode;
4827 struct nfs4_state_owner *sp = state->owner;
4828 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4829 struct nfs_seqid *seqid;
1da177e4 4830 struct nfs4_lock_state *lsp;
06f814a3
TM		 4831 struct rpc_task *task;
4832 int status = 0;
536ff0f8 4833 unsigned char fl_flags = request->fl_flags;
faf5f49c 4834
8d0a8a9d 4835 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4836 /* Unlock _before_ we do the RPC call */
4837 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4838 /* Exclude nfs_delegation_claim_locks() */
4839 mutex_lock(&sp->so_delegreturn_mutex);
4840 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4841 down_read(&nfsi->rwsem);
4842 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4843 up_read(&nfsi->rwsem);
65b62a29 4844 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4845 goto out;
19e03c57
TM		 4846 }
4847 up_read(&nfsi->rwsem);
65b62a29 4848 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4849 if (status != 0)
9b073574
TM		 4850 goto out;
4851 /* Is this a delegated lock? */
8d0a8a9d 4852 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 4853 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
4854 goto out;
8535b2be 4855 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4856 status = -ENOMEM;
911d1aaf 4857 if (seqid == NULL)
9b073574 4858 goto out;
cd3758e3 4859 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4860 status = PTR_ERR(task);
4861 if (IS_ERR(task))
9b073574 4862 goto out;
a5d16a4d 4863 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4864 rpc_put_task(task);
9b073574 4865out:
536ff0f8 4866 request->fl_flags = fl_flags;
1da177e4
LT		 4867 return status;
4868}
4869
a5d16a4d
TM		 4870struct nfs4_lockdata {
4871 struct nfs_lock_args arg;
4872 struct nfs_lock_res res;
4873 struct nfs4_lock_state *lsp;
4874 struct nfs_open_context *ctx;
4875 struct file_lock fl;
26e976a8 4876 unsigned long timestamp;
a5d16a4d
TM		 4877 int rpc_status;
4878 int cancelled;
66179efe 4879 struct nfs_server *server;
a5d16a4d
TM		 4880};
4881
4882static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4883 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4884 gfp_t gfp_mask)
1da177e4 4885{
a5d16a4d
TM		 4886 struct nfs4_lockdata *p;
4887 struct inode *inode = lsp->ls_state->inode;
1da177e4 4888 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4889
8535b2be 4890 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4891 if (p == NULL)
4892 return NULL;
4893
4894 p->arg.fh = NFS_FH(inode);
4895 p->arg.fl = &p->fl;
8535b2be 4896 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4897 if (p->arg.open_seqid == NULL)
4898 goto out_free;
8535b2be 4899 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4900 if (p->arg.lock_seqid == NULL)
2f74c0a0 4901 goto out_free_seqid;
a5d16a4d 4902 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4903 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4904 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4905 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4906 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4907 p->lsp = lsp;
66179efe 4908 p->server = server;
a5d16a4d
TM		 4909 atomic_inc(&lsp->ls_count);
4910 p->ctx = get_nfs_open_context(ctx);
4911 memcpy(&p->fl, fl, sizeof(p->fl));
4912 return p;
2f74c0a0
TM		 4913out_free_seqid:
4914 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4915out_free:
4916 kfree(p);
4917 return NULL;
4918}
4919
4920static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4921{
4922 struct nfs4_lockdata *data = calldata;
4923 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4924
3110ff80 4925 dprintk("%s: begin!\n", __func__);
2f74c0a0 4926 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4927 goto out_wait;
a5d16a4d
TM		 4928 /* Do we need to do an open_to_lock_owner? */
4929 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4930 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4931 goto out_release_lock_seqid;
8fe72bac 4932 }
8e472f33 4933 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4934 data->arg.new_lock_owner = 1;
c1d51931 4935 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4936 } else
4937 data->arg.new_lock_owner = 0;
5d422301
TM		 4938 if (!nfs4_valid_open_stateid(state)) {
4939 data->rpc_status = -EBADF;
4940 task->tk_action = NULL;
4941 goto out_release_open_seqid;
4942 }
26e976a8 4943 data->timestamp = jiffies;
035168ab
TM		 4944 if (nfs4_setup_sequence(data->server,
4945 &data->arg.seq_args,
2240a9e2 4946 &data->res.seq_res,
d9afbd1b 4947 task) == 0)
66179efe 4948 return;
5d422301 4949out_release_open_seqid:
2240a9e2
TM		 4950 nfs_release_seqid(data->arg.open_seqid);
4951out_release_lock_seqid:
4952 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4953out_wait:
4954 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4955 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4956}
4957
a5d16a4d
TM		 4958static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4959{
4960 struct nfs4_lockdata *data = calldata;
4961
3110ff80 4962 dprintk("%s: begin!\n", __func__);
a5d16a4d 4963
14516c3a
TM		 4964 if (!nfs4_sequence_done(task, &data->res.seq_res))
4965 return;
66179efe 4966
a5d16a4d 4967 data->rpc_status = task->tk_status;
a5d16a4d 4968 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4969 if (data->rpc_status == 0)
4970 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4971 else
4972 goto out;
4973 }
4974 if (data->rpc_status == 0) {
f597c537 4975 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4976 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4977 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4978 }
a5d16a4d 4979out:
3110ff80 4980 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4981}
4982
4983static void nfs4_lock_release(void *calldata)
4984{
4985 struct nfs4_lockdata *data = calldata;
4986
3110ff80 4987 dprintk("%s: begin!\n", __func__);
2f74c0a0 4988 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4989 if (data->cancelled != 0) {
4990 struct rpc_task *task;
4991 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4992 data->arg.lock_seqid);
4993 if (!IS_ERR(task))
bf294b41 4994 rpc_put_task_async(task);
3110ff80 4995 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4996 } else
4997 nfs_free_seqid(data->arg.lock_seqid);
4998 nfs4_put_lock_state(data->lsp);
4999 put_nfs_open_context(data->ctx);
5000 kfree(data);
3110ff80 5001 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5002}
5003
5004static const struct rpc_call_ops nfs4_lock_ops = {
5005 .rpc_call_prepare = nfs4_lock_prepare,
5006 .rpc_call_done = nfs4_lock_done,
5007 .rpc_release = nfs4_lock_release,
5008};
5009
2bee72a6
TM		 5010static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5011{
2bee72a6
TM		 5012 switch (error) {
5013 case -NFS4ERR_ADMIN_REVOKED:
5014 case -NFS4ERR_BAD_STATEID:
ecac799a 5015 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5016 if (new_lock_owner != 0 ||
795a88c9 5017 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5018 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5019 break;
5020 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5021 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5022 case -NFS4ERR_EXPIRED:
5023 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5024 };
5025}
5026
afe6c27c 5027static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5028{
5029 struct nfs4_lockdata *data;
5030 struct rpc_task *task;
5138fde0
TM		 5031 struct rpc_message msg = {
5032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5033 .rpc_cred = state->owner->so_cred,
5034 };
c970aa85
TM		 5035 struct rpc_task_setup task_setup_data = {
5036 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5037 .rpc_message = &msg,
c970aa85 5038 .callback_ops = &nfs4_lock_ops,
101070ca 5039 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5040 .flags = RPC_TASK_ASYNC,
5041 };
a5d16a4d
TM		 5042 int ret;
5043
3110ff80 5044 dprintk("%s: begin!\n", __func__);
cd3758e3 5045 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5046 fl->fl_u.nfs4_fl.owner,
5047 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5048 if (data == NULL)
5049 return -ENOMEM;
5050 if (IS_SETLKW(cmd))
5051 data->arg.block = 1;
9d12b216 5052 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5053 msg.rpc_argp = &data->arg;
5054 msg.rpc_resp = &data->res;
c970aa85 5055 task_setup_data.callback_data = data;
8fe72bac
TM		 5056 if (recovery_type > NFS_LOCK_NEW) {
5057 if (recovery_type == NFS_LOCK_RECLAIM)
5058 data->arg.reclaim = NFS_LOCK_RECLAIM;
5059 nfs4_set_sequence_privileged(&data->arg.seq_args);
5060 }
c970aa85 5061 task = rpc_run_task(&task_setup_data);
7a1218a2 5062 if (IS_ERR(task))
a5d16a4d 5063 return PTR_ERR(task);
a5d16a4d
TM		 5064 ret = nfs4_wait_for_completion_rpc_task(task);
5065 if (ret == 0) {
5066 ret = data->rpc_status;
2bee72a6
TM		 5067 if (ret)
5068 nfs4_handle_setlk_error(data->server, data->lsp,
5069 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5070 } else
5071 data->cancelled = 1;
e6b3c4db 5072 rpc_put_task(task);
3110ff80 5073 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5074 return ret;
1da177e4
LT		 5075}
5076
5077static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5078{
202b50dc 5079 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5080 struct nfs4_exception exception = {
5081 .inode = state->inode,
5082 };
202b50dc
TM		 5083 int err;
5084
5085 do {
42a2d13e
TM		 5086 /* Cache the lock if possible... */
5087 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5088 return 0;
afe6c27c 5089 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5090 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5091 break;
5092 nfs4_handle_exception(server, err, &exception);
5093 } while (exception.retry);
5094 return err;
1da177e4
LT		 5095}
5096
5097static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5098{
202b50dc 5099 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5100 struct nfs4_exception exception = {
5101 .inode = state->inode,
5102 };
202b50dc
TM		 5103 int err;
5104
6bfc93ef
TM		 5105 err = nfs4_set_lock_state(state, request);
5106 if (err != 0)
5107 return err;
202b50dc 5108 do {
42a2d13e
TM		 5109 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5110 return 0;
afe6c27c 5111 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5112 switch (err) {
5113 default:
5114 goto out;
5115 case -NFS4ERR_GRACE:
5116 case -NFS4ERR_DELAY:
5117 nfs4_handle_exception(server, err, &exception);
5118 err = 0;
5119 }
202b50dc 5120 } while (exception.retry);
a9ed2e25 5121out:
202b50dc 5122 return err;
1da177e4
LT		 5123}
5124
f062eb6c 5125#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5126/**
5127 * nfs41_check_expired_locks - possibly free a lock stateid
5128 *
5129 * @state: NFSv4 state for an inode
5130 *
5131 * Returns NFS_OK if recovery for this stateid is now finished.
5132 * Otherwise a negative NFS4ERR value is returned.
5133 */
b01dd1d8 5134static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5135{
eb64cf96 5136 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5137 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5138 struct nfs_server *server = NFS_SERVER(state->inode);
5139
b01dd1d8 5140 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5141 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 5142 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5143 if (status != NFS_OK) {
3e60ffdd
CL		 5144 /* Free the stateid unless the server
5145 * informs us the stateid is unrecognized. */
89af2739
CL		 5146 if (status != -NFS4ERR_BAD_STATEID)
5147 nfs41_free_stateid(server,
5148 &lsp->ls_stateid);
795a88c9 5149 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5150 ret = status;
5151 }
5152 }
5153 };
5154
5155 return ret;
5156}
5157
5158static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5159{
5160 int status = NFS_OK;
5161
5162 if (test_bit(LK_STATE_IN_USE, &state->flags))
5163 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5164 if (status != NFS_OK)
5165 status = nfs4_lock_expired(state, request);
5166 return status;
f062eb6c
BS		 5167}
5168#endif
5169
1da177e4
LT		 5170static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5171{
9a99af49 5172 struct nfs4_state_owner *sp = state->owner;
19e03c57 5173 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5174 unsigned char fl_flags = request->fl_flags;
9a99af49 5175 unsigned int seq;
8e469ebd 5176 int status = -ENOLCK;
1da177e4 5177
8e469ebd
TM		 5178 if ((fl_flags & FL_POSIX) &&
5179 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5180 goto out;
6bfc93ef 5181 /* Is this a delegated open? */
6bfc93ef
TM		 5182 status = nfs4_set_lock_state(state, request);
5183 if (status != 0)
5184 goto out;
01c3b861
TM		 5185 request->fl_flags |= FL_ACCESS;
5186 status = do_vfs_lock(request->fl_file, request);
5187 if (status < 0)
5188 goto out;
19e03c57 5189 down_read(&nfsi->rwsem);
01c3b861 5190 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5191 /* Yes: cache locks! */
01c3b861 5192 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5193 request->fl_flags = fl_flags & ~FL_SLEEP;
5194 status = do_vfs_lock(request->fl_file, request);
5195 goto out_unlock;
01c3b861 5196 }
9a99af49
TM		 5197 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5198 up_read(&nfsi->rwsem);
afe6c27c 5199 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5200 if (status != 0)
9a99af49
TM		 5201 goto out;
5202 down_read(&nfsi->rwsem);
5203 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5204 status = -NFS4ERR_DELAY;
01c3b861 5205 goto out_unlock;
9a99af49 5206 }
6bfc93ef 5207 /* Note: we always want to sleep here! */
01c3b861 5208 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5209 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5210 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5211 "manager!\n", __func__);
01c3b861 5212out_unlock:
19e03c57 5213 up_read(&nfsi->rwsem);
01c3b861
TM		 5214out:
5215 request->fl_flags = fl_flags;
1da177e4
LT		 5216 return status;
5217}
5218
5219static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5220{
a1d0b5ee
TM		 5221 struct nfs4_exception exception = {
5222 .state = state,
05ffe24f 5223 .inode = state->inode,
a1d0b5ee 5224 };
1da177e4
LT		 5225 int err;
5226
5227 do {
965b5d67
TM		 5228 err = _nfs4_proc_setlk(state, cmd, request);
5229 if (err == -NFS4ERR_DENIED)
5230 err = -EAGAIN;
1da177e4 5231 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5232 err, &exception);
1da177e4
LT		 5233 } while (exception.retry);
5234 return err;
5235}
5236
5237static int
5238nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5239{
5240 struct nfs_open_context *ctx;
5241 struct nfs4_state *state;
5242 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5243 int status;
5244
5245 /* verify open state */
cd3758e3 5246 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5247 state = ctx->state;
5248
5249 if (request->fl_start < 0 || request->fl_end < 0)
5250 return -EINVAL;
5251
d953126a
TM		 5252 if (IS_GETLK(cmd)) {
5253 if (state != NULL)
5254 return nfs4_proc_getlk(state, F_GETLK, request);
5255 return 0;
5256 }
1da177e4
LT		 5257
5258 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5259 return -EINVAL;
5260
d953126a
TM		 5261 if (request->fl_type == F_UNLCK) {
5262 if (state != NULL)
5263 return nfs4_proc_unlck(state, cmd, request);
5264 return 0;
5265 }
1da177e4 5266
d953126a
TM		 5267 if (state == NULL)
5268 return -ENOLCK;
55725513
TM		 5269 /*
5270 * Don't rely on the VFS having checked the file open mode,
5271 * since it won't do this for flock() locks.
5272 */
f44106e2 5273 switch (request->fl_type) {
55725513
TM		 5274 case F_RDLCK:
5275 if (!(filp->f_mode & FMODE_READ))
5276 return -EBADF;
5277 break;
5278 case F_WRLCK:
5279 if (!(filp->f_mode & FMODE_WRITE))
5280 return -EBADF;
5281 }
5282
1da177e4
LT		 5283 do {
5284 status = nfs4_proc_setlk(state, cmd, request);
5285 if ((status != -EAGAIN) || IS_SETLK(cmd))
5286 break;
5287 timeout = nfs4_set_lock_task_retry(timeout);
5288 status = -ERESTARTSYS;
5289 if (signalled())
5290 break;
5291 } while(status < 0);
1da177e4
LT		 5292 return status;
5293}
5294
db4f2e63 5295int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5296{
5297 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5298 int err;
5299
5300 err = nfs4_set_lock_state(state, fl);
5301 if (err != 0)
db4f2e63 5302 return err;
4a706fa0 5303 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5304 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5305}
6b3b5496 5306
cf470c3e
TM		 5307struct nfs_release_lockowner_data {
5308 struct nfs4_lock_state *lsp;
5ae67c4f 5309 struct nfs_server *server;
cf470c3e
TM		 5310 struct nfs_release_lockowner_args args;
5311};
5312
d3c7b7cc
TM		 5313static void nfs4_release_lockowner_release(void *calldata)
5314{
cf470c3e 5315 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5316 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5317 kfree(calldata);
5318}
5319
17280175 5320static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5321 .rpc_release = nfs4_release_lockowner_release,
5322};
5323
c8b2d0bf 5324static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5325{
cf470c3e 5326 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5327 struct rpc_message msg = {
5328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5329 };
5330
5331 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5332 return -EINVAL;
5333 data = kmalloc(sizeof(*data), GFP_NOFS);
5334 if (!data)
5335 return -ENOMEM;
5336 data->lsp = lsp;
5ae67c4f 5337 data->server = server;
cf470c3e
TM		 5338 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5339 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5340 data->args.lock_owner.s_dev = server->s_dev;
5341 msg.rpc_argp = &data->args;
5342 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5343 return 0;
d3c7b7cc
TM		 5344}
5345
aa1870af
BF		 5346#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5347
64c2ce8b
AK		 5348static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5349 const void *buf, size_t buflen,
5350 int flags, int type)
6b3b5496 5351{
64c2ce8b
AK		 5352 if (strcmp(key, "") != 0)
5353 return -EINVAL;
4b580ee3 5354
64c2ce8b 5355 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5356}
5357
64c2ce8b
AK		 5358static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5359 void *buf, size_t buflen, int type)
6b3b5496 5360{
64c2ce8b
AK		 5361 if (strcmp(key, "") != 0)
5362 return -EINVAL;
aa1870af 5363
64c2ce8b 5364 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5365}
5366
64c2ce8b
AK		 5367static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5368 size_t list_len, const char *name,
5369 size_t name_len, int type)
6b3b5496 5370{
64c2ce8b 5371 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5372
096455a2
BF		 5373 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5374 return 0;
64c2ce8b
AK		 5375
5376 if (list && len <= list_len)
5377 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5378 return len;
6b3b5496
BF		 5379}
5380
533eb461
AA		 5381/*
5382 * nfs_fhget will use either the mounted_on_fileid or the fileid
5383 */
69aaaae1
TM		 5384static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5385{
533eb461
AA		 5386 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5387 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5388 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5389 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5390 return;
5391
5392 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5393 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5394 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5395 fattr->nlink = 2;
5396}
5397
f05d147f
BS		 5398static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5399 const struct qstr *name,
5400 struct nfs4_fs_locations *fs_locations,
5401 struct page *page)
683b57b4
TM		 5402{
5403 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5404 u32 bitmask[3] = {
361e624f 5405 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5406 };
5407 struct nfs4_fs_locations_arg args = {
5408 .dir_fh = NFS_FH(dir),
c228fd3a 5409 .name = name,
683b57b4
TM		 5410 .page = page,
5411 .bitmask = bitmask,
5412 };
22958463
BH		 5413 struct nfs4_fs_locations_res res = {
5414 .fs_locations = fs_locations,
5415 };
683b57b4
TM		 5416 struct rpc_message msg = {
5417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5418 .rpc_argp = &args,
22958463 5419 .rpc_resp = &res,
683b57b4
TM		 5420 };
5421 int status;
5422
3110ff80 5423 dprintk("%s: start\n", __func__);
533eb461
AA		 5424
5425 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5426 * is not supported */
5427 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5428 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5429 else
5430 bitmask[0] |= FATTR4_WORD0_FILEID;
5431
c228fd3a 5432 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5433 fs_locations->server = server;
830b8e33 5434 fs_locations->nlocations = 0;
f05d147f 5435 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5436 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5437 return status;
5438}
5439
f05d147f
BS		 5440int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5441 const struct qstr *name,
5442 struct nfs4_fs_locations *fs_locations,
5443 struct page *page)
db0a9593
BS		 5444{
5445 struct nfs4_exception exception = { };
5446 int err;
5447 do {
5448 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5449 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5450 &exception);
5451 } while (exception.retry);
5452 return err;
5453}
5454
5a5ea0d4
BS		 5455static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5456{
5457 int status;
5458 struct nfs4_secinfo_arg args = {
5459 .dir_fh = NFS_FH(dir),
5460 .name = name,
5461 };
5462 struct nfs4_secinfo_res res = {
5463 .flavors = flavors,
5464 };
5465 struct rpc_message msg = {
5466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5467 .rpc_argp = &args,
5468 .rpc_resp = &res,
5469 };
5470
5471 dprintk("NFS call secinfo %s\n", name->name);
5472 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5473 dprintk("NFS reply secinfo: %d\n", status);
5474 return status;
5475}
5476
72de53ec
BS		 5477int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5478 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5479{
5480 struct nfs4_exception exception = { };
5481 int err;
5482 do {
5483 err = nfs4_handle_exception(NFS_SERVER(dir),
5484 _nfs4_proc_secinfo(dir, name, flavors),
5485 &exception);
5486 } while (exception.retry);
5487 return err;
5488}
5489
557134a3 5490#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5491/*
5492 * Check the exchange flags returned by the server for invalid flags, having
5493 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5494 * DS flags set.
5495 */
5496static int nfs4_check_cl_exchange_flags(u32 flags)
5497{
5498 if (flags & ~EXCHGID4_FLAG_MASK_R)
5499 goto out_inval;
5500 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5501 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5502 goto out_inval;
5503 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5504 goto out_inval;
5505 return NFS_OK;
5506out_inval:
5507 return -NFS4ERR_INVAL;
5508}
5509
78fe0f41 5510static bool
79d4e1f0
CL		 5511nfs41_same_server_scope(struct nfs41_server_scope *a,
5512 struct nfs41_server_scope *b)
78fe0f41
WAA		 5513{
5514 if (a->server_scope_sz == b->server_scope_sz &&
5515 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5516 return true;
5517
5518 return false;
5519}
5520
7c44f1ae
WAA		 5521/*
5522 * nfs4_proc_bind_conn_to_session()
5523 *
5524 * The 4.1 client currently uses the same TCP connection for the
5525 * fore and backchannel.
5526 */
2cf047c9 5527int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5528{
5529 int status;
5530 struct nfs41_bind_conn_to_session_res res;
5531 struct rpc_message msg = {
5532 .rpc_proc =
5533 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5534 .rpc_argp = clp,
5535 .rpc_resp = &res,
2cf047c9 5536 .rpc_cred = cred,
7c44f1ae
WAA		 5537 };
5538
5539 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5540
5541 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5542 if (unlikely(res.session == NULL)) {
5543 status = -ENOMEM;
5544 goto out;
5545 }
5546
5547 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5548 if (status == 0) {
5549 if (memcmp(res.session->sess_id.data,
5550 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5551 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5552 status = -EIO;
5553 goto out_session;
5554 }
5555 if (res.dir != NFS4_CDFS4_BOTH) {
5556 dprintk("NFS: %s: Unexpected direction from server\n",
5557 __func__);
5558 status = -EIO;
5559 goto out_session;
5560 }
5561 if (res.use_conn_in_rdma_mode) {
5562 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5563 __func__);
5564 status = -EIO;
5565 goto out_session;
5566 }
5567 }
5568out_session:
5569 kfree(res.session);
5570out:
5571 dprintk("<-- %s status= %d\n", __func__, status);
5572 return status;
5573}
5574
99fe60d0
BH		 5575/*
5576 * nfs4_proc_exchange_id()
5577 *
6bbb4ae8
CL		 5578 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5579 *
99fe60d0
BH		 5580 * Since the clientid has expired, all compounds using sessions
5581 * associated with the stale clientid will be returning
5582 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5583 * be in some phase of session reset.
5584 */
4d643d1d 5585int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5586{
5587 nfs4_verifier verifier;
5588 struct nfs41_exchange_id_args args = {
cd93710e 5589 .verifier = &verifier,
99fe60d0 5590 .client = clp,
357f54d6 5591 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5592 };
5593 struct nfs41_exchange_id_res res = {
32b01310 5594 0
99fe60d0
BH		 5595 };
5596 int status;
5597 struct rpc_message msg = {
5598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5599 .rpc_argp = &args,
5600 .rpc_resp = &res,
5601 .rpc_cred = cred,
5602 };
99fe60d0 5603
f092075d 5604 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5605 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5606 sizeof(args.id));
6bbb4ae8
CL		 5607 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5608 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5609 args.id_len, args.id);
99fe60d0 5610
acdeb69d 5611 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5612 GFP_NOFS);
acdeb69d 5613 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5614 status = -ENOMEM;
5615 goto out;
5616 }
78fe0f41 5617
79d4e1f0 5618 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5619 GFP_NOFS);
177313f1 5620 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5621 status = -ENOMEM;
acdeb69d 5622 goto out_server_owner;
abe9a6d5 5623 }
78fe0f41 5624
bbafffd2 5625 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5626 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5627 status = -ENOMEM;
5628 goto out_server_scope;
5629 }
5630
1bd714f2 5631 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5632 if (status == 0)
32b01310 5633 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5634
acdeb69d 5635 if (status == 0) {
32b01310
TM		 5636 clp->cl_clientid = res.clientid;
5637 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5638 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5639 clp->cl_seqid = res.seqid;
5640
acdeb69d
CL		 5641 kfree(clp->cl_serverowner);
5642 clp->cl_serverowner = res.server_owner;
5643 res.server_owner = NULL;
78fe0f41 5644
7d2ed9ac 5645 /* use the most recent implementation id */
59155546
CL		 5646 kfree(clp->cl_implid);
5647 clp->cl_implid = res.impl_id;
7d2ed9ac 5648
177313f1 5649 if (clp->cl_serverscope != NULL &&
79d4e1f0 5650 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5651 res.server_scope)) {
5652 dprintk("%s: server_scope mismatch detected\n",
5653 __func__);
5654 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5655 kfree(clp->cl_serverscope);
5656 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5657 }
5658
177313f1 5659 if (clp->cl_serverscope == NULL) {
79d4e1f0 5660 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5661 goto out;
5662 }
32b01310
TM		 5663 } else
5664 kfree(res.impl_id);
7d2ed9ac 5665
acdeb69d
CL		 5666out_server_owner:
5667 kfree(res.server_owner);
7d2ed9ac 5668out_server_scope:
abe9a6d5
WAA		 5669 kfree(res.server_scope);
5670out:
177313f1 5671 if (clp->cl_implid != NULL)
6bbb4ae8 5672 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5673 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5674 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5675 clp->cl_implid->date.seconds,
5676 clp->cl_implid->date.nseconds);
6bbb4ae8 5677 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5678 return status;
5679}
5680
66245539
TM		 5681static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5682 struct rpc_cred *cred)
5683{
5684 struct rpc_message msg = {
5685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5686 .rpc_argp = clp,
5687 .rpc_cred = cred,
5688 };
5689 int status;
5690
5691 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5692 if (status)
02c67525 5693 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5694 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5695 return status;
5696}
5697
5698static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5699 struct rpc_cred *cred)
5700{
5701 unsigned int loop;
5702 int ret;
5703
5704 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5705 ret = _nfs4_proc_destroy_clientid(clp, cred);
5706 switch (ret) {
5707 case -NFS4ERR_DELAY:
5708 case -NFS4ERR_CLIENTID_BUSY:
5709 ssleep(1);
5710 break;
5711 default:
5712 return ret;
5713 }
5714 }
5715 return 0;
5716}
5717
5718int nfs4_destroy_clientid(struct nfs_client *clp)
5719{
5720 struct rpc_cred *cred;
5721 int ret = 0;
5722
5723 if (clp->cl_mvops->minor_version < 1)
5724 goto out;
5725 if (clp->cl_exchange_flags == 0)
5726 goto out;
05f4c350
CL		 5727 if (clp->cl_preserve_clid)
5728 goto out;
66245539
TM		 5729 cred = nfs4_get_exchange_id_cred(clp);
5730 ret = nfs4_proc_destroy_clientid(clp, cred);
5731 if (cred)
5732 put_rpccred(cred);
5733 switch (ret) {
5734 case 0:
5735 case -NFS4ERR_STALE_CLIENTID:
5736 clp->cl_exchange_flags = 0;
5737 }
5738out:
5739 return ret;
5740}
5741
2050f0cc
AA		 5742struct nfs4_get_lease_time_data {
5743 struct nfs4_get_lease_time_args *args;
5744 struct nfs4_get_lease_time_res *res;
5745 struct nfs_client *clp;
5746};
5747
5748static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5749 void *calldata)
5750{
2050f0cc
AA		 5751 struct nfs4_get_lease_time_data *data =
5752 (struct nfs4_get_lease_time_data *)calldata;
5753
5754 dprintk("--> %s\n", __func__);
5755 /* just setup sequence, do not trigger session recovery
5756 since we're invoked within one */
d9afbd1b
TM		 5757 nfs41_setup_sequence(data->clp->cl_session,
5758 &data->args->la_seq_args,
5759 &data->res->lr_seq_res,
5760 task);
2050f0cc
AA		 5761 dprintk("<-- %s\n", __func__);
5762}
5763
5764/*
5765 * Called from nfs4_state_manager thread for session setup, so don't recover
5766 * from sequence operation or clientid errors.
5767 */
5768static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5769{
5770 struct nfs4_get_lease_time_data *data =
5771 (struct nfs4_get_lease_time_data *)calldata;
5772
5773 dprintk("--> %s\n", __func__);
14516c3a
TM		 5774 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5775 return;
2050f0cc
AA		 5776 switch (task->tk_status) {
5777 case -NFS4ERR_DELAY:
5778 case -NFS4ERR_GRACE:
5779 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5780 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5781 task->tk_status = 0;
a8a4ae3a
AA		 5782 /* fall through */
5783 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5784 rpc_restart_call_prepare(task);
2050f0cc
AA		 5785 return;
5786 }
2050f0cc
AA		 5787 dprintk("<-- %s\n", __func__);
5788}
5789
17280175 5790static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5791 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5792 .rpc_call_done = nfs4_get_lease_time_done,
5793};
5794
5795int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5796{
5797 struct rpc_task *task;
5798 struct nfs4_get_lease_time_args args;
5799 struct nfs4_get_lease_time_res res = {
5800 .lr_fsinfo = fsinfo,
5801 };
5802 struct nfs4_get_lease_time_data data = {
5803 .args = &args,
5804 .res = &res,
5805 .clp = clp,
5806 };
5807 struct rpc_message msg = {
5808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5809 .rpc_argp = &args,
5810 .rpc_resp = &res,
5811 };
5812 struct rpc_task_setup task_setup = {
5813 .rpc_client = clp->cl_rpcclient,
5814 .rpc_message = &msg,
5815 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5816 .callback_data = &data,
5817 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5818 };
5819 int status;
5820
9d12b216 5821 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5822 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5823 dprintk("--> %s\n", __func__);
5824 task = rpc_run_task(&task_setup);
5825
5826 if (IS_ERR(task))
5827 status = PTR_ERR(task);
5828 else {
5829 status = task->tk_status;
5830 rpc_put_task(task);
5831 }
5832 dprintk("<-- %s return %d\n", __func__, status);
5833
5834 return status;
5835}
5836
fc931582
AA		 5837/*
5838 * Initialize the values to be used by the client in CREATE_SESSION
5839 * If nfs4_init_session set the fore channel request and response sizes,
5840 * use them.
5841 *
5842 * Set the back channel max_resp_sz_cached to zero to force the client to
5843 * always set csa_cachethis to FALSE because the current implementation
5844 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5845 */
5846static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5847{
5848 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5849 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5850 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5851
5852 if (mxrqst_sz == 0)
5853 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5854 if (mxresp_sz == 0)
5855 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5856 /* Fore channel attributes */
fc931582
AA		 5857 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5858 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5859 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5860 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5861
5862 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5863 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5864 __func__,
5865 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5866 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5867
5868 /* Back channel attributes */
fc931582
AA		 5869 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5870 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5871 args->bc_attrs.max_resp_sz_cached = 0;
5872 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5873 args->bc_attrs.max_reqs = 1;
5874
5875 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5876 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5877 __func__,
5878 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5879 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5880 args->bc_attrs.max_reqs);
5881}
5882
43c2e885 5883static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5884{
43c2e885
BF		 5885 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5886 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5887
43c2e885
BF		 5888 if (rcvd->max_resp_sz > sent->max_resp_sz)
5889 return -EINVAL;
5890 /*
5891 * Our requested max_ops is the minimum we need; we're not
5892 * prepared to break up compounds into smaller pieces than that.
5893 * So, no point even trying to continue if the server won't
5894 * cooperate:
5895 */
5896 if (rcvd->max_ops < sent->max_ops)
5897 return -EINVAL;
5898 if (rcvd->max_reqs == 0)
5899 return -EINVAL;
b4b9a0c1
VG		 5900 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5901 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5902 return 0;
8d35301d
AA		 5903}
5904
43c2e885
BF		 5905static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5906{
5907 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5908 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5909
43c2e885
BF		 5910 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5911 return -EINVAL;
5912 if (rcvd->max_resp_sz < sent->max_resp_sz)
5913 return -EINVAL;
5914 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5915 return -EINVAL;
5916 /* These would render the backchannel useless: */
b4b9a0c1 5917 if (rcvd->max_ops != sent->max_ops)
43c2e885 5918 return -EINVAL;
b4b9a0c1 5919 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5920 return -EINVAL;
5921 return 0;
5922}
8d35301d 5923
8d35301d
AA		 5924static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5925 struct nfs4_session *session)
5926{
43c2e885 5927 int ret;
8d35301d 5928
43c2e885
BF		 5929 ret = nfs4_verify_fore_channel_attrs(args, session);
5930 if (ret)
5931 return ret;
5932 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5933}
5934
848f5bda
TM		 5935static int _nfs4_proc_create_session(struct nfs_client *clp,
5936 struct rpc_cred *cred)
fc931582
AA		 5937{
5938 struct nfs4_session *session = clp->cl_session;
5939 struct nfs41_create_session_args args = {
5940 .client = clp,
5941 .cb_program = NFS4_CALLBACK,
5942 };
5943 struct nfs41_create_session_res res = {
5944 .client = clp,
5945 };
5946 struct rpc_message msg = {
5947 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5948 .rpc_argp = &args,
5949 .rpc_resp = &res,
848f5bda 5950 .rpc_cred = cred,
fc931582
AA		 5951 };
5952 int status;
5953
5954 nfs4_init_channel_attrs(&args);
0f91421e 5955 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5956
1bd714f2 5957 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5958
43095d39 5959 if (!status) {
8d35301d
AA		 5960 /* Verify the session's negotiated channel_attrs values */
5961 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5962 /* Increment the clientid slot sequence id */
5963 clp->cl_seqid++;
5964 }
5965
5966 return status;
5967}
5968
5969/*
5970 * Issues a CREATE_SESSION operation to the server.
5971 * It is the responsibility of the caller to verify the session is
5972 * expired before calling this routine.
5973 */
848f5bda 5974int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5975{
5976 int status;
5977 unsigned *ptr;
fc931582
AA		 5978 struct nfs4_session *session = clp->cl_session;
5979
5980 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5981
848f5bda 5982 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5983 if (status)
5984 goto out;
5985
aacd5537
AA		 5986 /* Init or reset the session slot tables */
5987 status = nfs4_setup_session_slot_tables(session);
5988 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5989 if (status)
5990 goto out;
5991
5992 ptr = (unsigned *)&session->sess_id.data[0];
5993 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5994 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5995out:
5996 dprintk("<-- %s\n", __func__);
5997 return status;
5998}
5999
0f3e66c6
AA		 6000/*
6001 * Issue the over-the-wire RPC DESTROY_SESSION.
6002 * The caller must serialize access to this routine.
6003 */
848f5bda
TM		 6004int nfs4_proc_destroy_session(struct nfs4_session *session,
6005 struct rpc_cred *cred)
0f3e66c6 6006{
848f5bda
TM		 6007 struct rpc_message msg = {
6008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6009 .rpc_argp = session,
6010 .rpc_cred = cred,
6011 };
0f3e66c6 6012 int status = 0;
0f3e66c6
AA		 6013
6014 dprintk("--> nfs4_proc_destroy_session\n");
6015
6016 /* session is still being setup */
6017 if (session->clp->cl_cons_state != NFS_CS_READY)
6018 return status;
6019
1bd714f2 6020 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 6021
6022 if (status)
08106ac7 6023 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6024 "Session has been destroyed regardless...\n", status);
6025
6026 dprintk("<-- nfs4_proc_destroy_session\n");
6027 return status;
6028}
6029
fc01cea9
AA		 6030/*
6031 * Renew the cl_session lease.
6032 */
d5f8d3fe
TM		 6033struct nfs4_sequence_data {
6034 struct nfs_client *clp;
6035 struct nfs4_sequence_args args;
6036 struct nfs4_sequence_res res;
6037};
6038
dc96aef9
AB		 6039static void nfs41_sequence_release(void *data)
6040{
d5f8d3fe
TM		 6041 struct nfs4_sequence_data *calldata = data;
6042 struct nfs_client *clp = calldata->clp;
dc96aef9 6043
7135840f
AB		 6044 if (atomic_read(&clp->cl_count) > 1)
6045 nfs4_schedule_state_renewal(clp);
6046 nfs_put_client(clp);
d5f8d3fe 6047 kfree(calldata);
dc96aef9
AB		 6048}
6049
aa5190d0
TM		 6050static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6051{
6052 switch(task->tk_status) {
6053 case -NFS4ERR_DELAY:
aa5190d0
TM		 6054 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6055 return -EAGAIN;
6056 default:
0400a6b0 6057 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6058 }
6059 return 0;
6060}
6061
dc96aef9 6062static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6063{
d5f8d3fe
TM		 6064 struct nfs4_sequence_data *calldata = data;
6065 struct nfs_client *clp = calldata->clp;
fc01cea9 6066
14516c3a
TM		 6067 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6068 return;
fc01cea9
AA		 6069
6070 if (task->tk_status < 0) {
6071 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6072 if (atomic_read(&clp->cl_count) == 1)
6073 goto out;
fc01cea9 6074
aa5190d0
TM		 6075 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6076 rpc_restart_call_prepare(task);
fc01cea9
AA		 6077 return;
6078 }
6079 }
fc01cea9 6080 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6081out:
fc01cea9
AA		 6082 dprintk("<-- %s\n", __func__);
6083}
6084
6085static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6086{
d5f8d3fe
TM		 6087 struct nfs4_sequence_data *calldata = data;
6088 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6089 struct nfs4_sequence_args *args;
6090 struct nfs4_sequence_res *res;
6091
fc01cea9
AA		 6092 args = task->tk_msg.rpc_argp;
6093 res = task->tk_msg.rpc_resp;
6094
d9afbd1b 6095 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6096}
6097
6098static const struct rpc_call_ops nfs41_sequence_ops = {
6099 .rpc_call_done = nfs41_sequence_call_done,
6100 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6101 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6102};
6103
8fe72bac
TM		 6104static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6105 struct rpc_cred *cred,
6106 bool is_privileged)
fc01cea9 6107{
d5f8d3fe 6108 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6109 struct rpc_message msg = {
6110 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6111 .rpc_cred = cred,
6112 };
71ac6da9
TM		 6113 struct rpc_task_setup task_setup_data = {
6114 .rpc_client = clp->cl_rpcclient,
6115 .rpc_message = &msg,
8fe72bac 6116 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6117 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6118 };
fc01cea9 6119
7135840f 6120 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6121 return ERR_PTR(-EIO);
dfb4f309 6122 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6123 if (calldata == NULL) {
7135840f 6124 nfs_put_client(clp);
71ac6da9 6125 return ERR_PTR(-ENOMEM);
fc01cea9 6126 }
9d12b216 6127 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6128 if (is_privileged)
6129 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6130 msg.rpc_argp = &calldata->args;
6131 msg.rpc_resp = &calldata->res;
6132 calldata->clp = clp;
71ac6da9 6133 task_setup_data.callback_data = calldata;
fc01cea9 6134
71ac6da9
TM		 6135 return rpc_run_task(&task_setup_data);
6136}
6137
2f60ea6b 6138static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6139{
6140 struct rpc_task *task;
6141 int ret = 0;
6142
2f60ea6b
TM		 6143 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6144 return 0;
8fe72bac 6145 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6146 if (IS_ERR(task))
6147 ret = PTR_ERR(task);
6148 else
bf294b41 6149 rpc_put_task_async(task);
71ac6da9
TM		 6150 dprintk("<-- %s status=%d\n", __func__, ret);
6151 return ret;
6152}
6153
6154static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6155{
6156 struct rpc_task *task;
6157 int ret;
6158
8fe72bac 6159 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6160 if (IS_ERR(task)) {
6161 ret = PTR_ERR(task);
6162 goto out;
6163 }
6164 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6165 if (!ret) {
6166 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6167
6168 if (task->tk_status == 0)
6169 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6170 ret = task->tk_status;
b4410c2f 6171 }
71ac6da9
TM		 6172 rpc_put_task(task);
6173out:
6174 dprintk("<-- %s status=%d\n", __func__, ret);
6175 return ret;
fc01cea9
AA		 6176}
6177
fce5c838
RL		 6178struct nfs4_reclaim_complete_data {
6179 struct nfs_client *clp;
6180 struct nfs41_reclaim_complete_args arg;
6181 struct nfs41_reclaim_complete_res res;
6182};
6183
6184static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6185{
6186 struct nfs4_reclaim_complete_data *calldata = data;
6187
d9afbd1b
TM		 6188 nfs41_setup_sequence(calldata->clp->cl_session,
6189 &calldata->arg.seq_args,
6190 &calldata->res.seq_res,
6191 task);
fce5c838
RL		 6192}
6193
aa5190d0
TM		 6194static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6195{
6196 switch(task->tk_status) {
6197 case 0:
6198 case -NFS4ERR_COMPLETE_ALREADY:
6199 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6200 break;
6201 case -NFS4ERR_DELAY:
aa5190d0 6202 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6203 /* fall through */
6204 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6205 return -EAGAIN;
6206 default:
0400a6b0 6207 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6208 }
6209 return 0;
6210}
6211
fce5c838
RL		 6212static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6213{
6214 struct nfs4_reclaim_complete_data *calldata = data;
6215 struct nfs_client *clp = calldata->clp;
6216 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6217
6218 dprintk("--> %s\n", __func__);
14516c3a
TM		 6219 if (!nfs41_sequence_done(task, res))
6220 return;
fce5c838 6221
aa5190d0
TM		 6222 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6223 rpc_restart_call_prepare(task);
6224 return;
6225 }
fce5c838
RL		 6226 dprintk("<-- %s\n", __func__);
6227}
6228
6229static void nfs4_free_reclaim_complete_data(void *data)
6230{
6231 struct nfs4_reclaim_complete_data *calldata = data;
6232
6233 kfree(calldata);
6234}
6235
6236static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6237 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6238 .rpc_call_done = nfs4_reclaim_complete_done,
6239 .rpc_release = nfs4_free_reclaim_complete_data,
6240};
6241
6242/*
6243 * Issue a global reclaim complete.
6244 */
6245static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6246{
6247 struct nfs4_reclaim_complete_data *calldata;
6248 struct rpc_task *task;
6249 struct rpc_message msg = {
6250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6251 };
6252 struct rpc_task_setup task_setup_data = {
6253 .rpc_client = clp->cl_rpcclient,
6254 .rpc_message = &msg,
6255 .callback_ops = &nfs4_reclaim_complete_call_ops,
6256 .flags = RPC_TASK_ASYNC,
6257 };
6258 int status = -ENOMEM;
6259
6260 dprintk("--> %s\n", __func__);
8535b2be 6261 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6262 if (calldata == NULL)
6263 goto out;
6264 calldata->clp = clp;
6265 calldata->arg.one_fs = 0;
fce5c838 6266
9d12b216 6267 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6268 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6269 msg.rpc_argp = &calldata->arg;
6270 msg.rpc_resp = &calldata->res;
6271 task_setup_data.callback_data = calldata;
6272 task = rpc_run_task(&task_setup_data);
acf82b85 6273 if (IS_ERR(task)) {
fce5c838 6274 status = PTR_ERR(task);
acf82b85
DC		 6275 goto out;
6276 }
c34c32ea
AA		 6277 status = nfs4_wait_for_completion_rpc_task(task);
6278 if (status == 0)
6279 status = task->tk_status;
fce5c838 6280 rpc_put_task(task);
acf82b85 6281 return 0;
fce5c838
RL		 6282out:
6283 dprintk("<-- %s status=%d\n", __func__, status);
6284 return status;
6285}
b1f69b75
AA		 6286
6287static void
6288nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6289{
6290 struct nfs4_layoutget *lgp = calldata;
c31663d4 6291 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6292 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6293
6294 dprintk("--> %s\n", __func__);
c31663d4
FI		 6295 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6296 * right now covering the LAYOUTGET we are about to send.
6297 * However, that is not so catastrophic, and there seems
6298 * to be no way to prevent it completely.
6299 */
6ba7db34 6300 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6301 &lgp->res.seq_res, task))
b1f69b75 6302 return;
cf7d63f1
FI		 6303 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6304 NFS_I(lgp->args.inode)->layout,
6305 lgp->args.ctx->state)) {
6306 rpc_exit(task, NFS4_OK);
cf7d63f1 6307 }
b1f69b75
AA		 6308}
6309
6310static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6311{
6312 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6313 struct inode *inode = lgp->args.inode;
6314 struct nfs_server *server = NFS_SERVER(inode);
6315 struct pnfs_layout_hdr *lo;
6316 struct nfs4_state *state = NULL;
30005121 6317 unsigned long timeo, giveup;
b1f69b75
AA		 6318
6319 dprintk("--> %s\n", __func__);
6320
6ba7db34 6321 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6322 goto out;
b1f69b75
AA		 6323
6324 switch (task->tk_status) {
6325 case 0:
ee314c2a 6326 goto out;
b1f69b75
AA		 6327 case -NFS4ERR_LAYOUTTRYLATER:
6328 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6329 timeo = rpc_get_timeout(task->tk_client);
6330 giveup = lgp->args.timestamp + timeo;
6331 if (time_after(giveup, jiffies))
6332 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6333 break;
6334 case -NFS4ERR_EXPIRED:
6335 case -NFS4ERR_BAD_STATEID:
6336 spin_lock(&inode->i_lock);
6337 lo = NFS_I(inode)->layout;
6338 if (!lo || list_empty(&lo->plh_segs)) {
6339 spin_unlock(&inode->i_lock);
6340 /* If the open stateid was bad, then recover it. */
6341 state = lgp->args.ctx->state;
6342 } else {
6343 LIST_HEAD(head);
6344
6345 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6346 spin_unlock(&inode->i_lock);
6347 /* Mark the bad layout state as invalid, then
6348 * retry using the open stateid. */
6349 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6350 }
6351 }
ee314c2a
TM		 6352 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6353 rpc_restart_call_prepare(task);
6354out:
b1f69b75
AA		 6355 dprintk("<-- %s\n", __func__);
6356}
6357
8554116e
IK		 6358static size_t max_response_pages(struct nfs_server *server)
6359{
6360 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6361 return nfs_page_array_len(0, max_resp_sz);
6362}
6363
6364static void nfs4_free_pages(struct page **pages, size_t size)
6365{
6366 int i;
6367
6368 if (!pages)
6369 return;
6370
6371 for (i = 0; i < size; i++) {
6372 if (!pages[i])
6373 break;
6374 __free_page(pages[i]);
6375 }
6376 kfree(pages);
6377}
6378
6379static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6380{
6381 struct page **pages;
6382 int i;
6383
6384 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6385 if (!pages) {
6386 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6387 return NULL;
6388 }
6389
6390 for (i = 0; i < size; i++) {
6391 pages[i] = alloc_page(gfp_flags);
6392 if (!pages[i]) {
6393 dprintk("%s: failed to allocate page\n", __func__);
6394 nfs4_free_pages(pages, size);
6395 return NULL;
6396 }
6397 }
6398
6399 return pages;
6400}
6401
b1f69b75
AA		 6402static void nfs4_layoutget_release(void *calldata)
6403{
6404 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6405 struct inode *inode = lgp->args.inode;
6406 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6407 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6408
6409 dprintk("--> %s\n", __func__);
8554116e 6410 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6411 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6412 put_nfs_open_context(lgp->args.ctx);
6413 kfree(calldata);
6414 dprintk("<-- %s\n", __func__);
6415}
6416
6417static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6418 .rpc_call_prepare = nfs4_layoutget_prepare,
6419 .rpc_call_done = nfs4_layoutget_done,
6420 .rpc_release = nfs4_layoutget_release,
6421};
6422
a0b0a6e3
TM		 6423struct pnfs_layout_segment *
6424nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6425{
a47970ff
WAA		 6426 struct inode *inode = lgp->args.inode;
6427 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6428 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6429 struct rpc_task *task;
6430 struct rpc_message msg = {
6431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6432 .rpc_argp = &lgp->args,
6433 .rpc_resp = &lgp->res,
6434 };
6435 struct rpc_task_setup task_setup_data = {
6436 .rpc_client = server->client,
6437 .rpc_message = &msg,
6438 .callback_ops = &nfs4_layoutget_call_ops,
6439 .callback_data = lgp,
6440 .flags = RPC_TASK_ASYNC,
6441 };
a0b0a6e3 6442 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6443 int status = 0;
6444
6445 dprintk("--> %s\n", __func__);
6446
8554116e
IK		 6447 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6448 if (!lgp->args.layout.pages) {
6449 nfs4_layoutget_release(lgp);
a0b0a6e3 6450 return ERR_PTR(-ENOMEM);
8554116e
IK		 6451 }
6452 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6453 lgp->args.timestamp = jiffies;
8554116e 6454
35124a09 6455 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6456 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6457 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6458
6459 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6460 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6461
b1f69b75
AA		 6462 task = rpc_run_task(&task_setup_data);
6463 if (IS_ERR(task))
a0b0a6e3 6464 return ERR_CAST(task);
b1f69b75 6465 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6466 if (status == 0)
6467 status = task->tk_status;
085b7a45
WAA		 6468 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6469 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6470 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6471 rpc_put_task(task);
6472 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6473 if (status)
6474 return ERR_PTR(status);
6475 return lseg;
b1f69b75
AA		 6476}
6477
cbe82603
BH		 6478static void
6479nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6480{
6481 struct nfs4_layoutreturn *lrp = calldata;
6482
6483 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6484 nfs41_setup_sequence(lrp->clp->cl_session,
6485 &lrp->args.seq_args,
6486 &lrp->res.seq_res,
6487 task);
cbe82603
BH		 6488}
6489
6490static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6491{
6492 struct nfs4_layoutreturn *lrp = calldata;
6493 struct nfs_server *server;
6494
6495 dprintk("--> %s\n", __func__);
6496
6ba7db34 6497 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6498 return;
6499
6500 server = NFS_SERVER(lrp->args.inode);
6501 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6502 rpc_restart_call_prepare(task);
cbe82603
BH		 6503 return;
6504 }
cbe82603
BH		 6505 dprintk("<-- %s\n", __func__);
6506}
6507
6508static void nfs4_layoutreturn_release(void *calldata)
6509{
6510 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6511 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6512
6513 dprintk("--> %s\n", __func__);
849b286f
TM		 6514 spin_lock(&lo->plh_inode->i_lock);
6515 if (lrp->res.lrs_present)
6516 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6517 lo->plh_block_lgets--;
6518 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6519 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6520 kfree(calldata);
6521 dprintk("<-- %s\n", __func__);
6522}
6523
6524static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6525 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6526 .rpc_call_done = nfs4_layoutreturn_done,
6527 .rpc_release = nfs4_layoutreturn_release,
6528};
6529
6530int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6531{
6532 struct rpc_task *task;
6533 struct rpc_message msg = {
6534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6535 .rpc_argp = &lrp->args,
6536 .rpc_resp = &lrp->res,
6537 };
6538 struct rpc_task_setup task_setup_data = {
6539 .rpc_client = lrp->clp->cl_rpcclient,
6540 .rpc_message = &msg,
6541 .callback_ops = &nfs4_layoutreturn_call_ops,
6542 .callback_data = lrp,
6543 };
6544 int status;
6545
6546 dprintk("--> %s\n", __func__);
9d12b216 6547 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6548 task = rpc_run_task(&task_setup_data);
6549 if (IS_ERR(task))
6550 return PTR_ERR(task);
6551 status = task->tk_status;
6552 dprintk("<-- %s status=%d\n", __func__, status);
6553 rpc_put_task(task);
6554 return status;
6555}
6556
7f11d8d3
AA		 6557/*
6558 * Retrieve the list of Data Server devices from the MDS.
6559 */
6560static int _nfs4_getdevicelist(struct nfs_server *server,
6561 const struct nfs_fh *fh,
6562 struct pnfs_devicelist *devlist)
6563{
6564 struct nfs4_getdevicelist_args args = {
6565 .fh = fh,
6566 .layoutclass = server->pnfs_curr_ld->id,
6567 };
6568 struct nfs4_getdevicelist_res res = {
6569 .devlist = devlist,
6570 };
6571 struct rpc_message msg = {
6572 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6573 .rpc_argp = &args,
6574 .rpc_resp = &res,
6575 };
6576 int status;
6577
6578 dprintk("--> %s\n", __func__);
6579 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6580 &res.seq_res, 0);
6581 dprintk("<-- %s status=%d\n", __func__, status);
6582 return status;
6583}
6584
6585int nfs4_proc_getdevicelist(struct nfs_server *server,
6586 const struct nfs_fh *fh,
6587 struct pnfs_devicelist *devlist)
6588{
6589 struct nfs4_exception exception = { };
6590 int err;
6591
6592 do {
6593 err = nfs4_handle_exception(server,
6594 _nfs4_getdevicelist(server, fh, devlist),
6595 &exception);
6596 } while (exception.retry);
6597
6598 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6599 err, devlist->num_devs);
6600
6601 return err;
6602}
6603EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6604
b1f69b75
AA		 6605static int
6606_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6607{
6608 struct nfs4_getdeviceinfo_args args = {
6609 .pdev = pdev,
6610 };
6611 struct nfs4_getdeviceinfo_res res = {
6612 .pdev = pdev,
6613 };
6614 struct rpc_message msg = {
6615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6616 .rpc_argp = &args,
6617 .rpc_resp = &res,
6618 };
6619 int status;
6620
6621 dprintk("--> %s\n", __func__);
7c513058 6622 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6623 dprintk("<-- %s status=%d\n", __func__, status);
6624
6625 return status;
6626}
6627
6628int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6629{
6630 struct nfs4_exception exception = { };
6631 int err;
6632
6633 do {
6634 err = nfs4_handle_exception(server,
6635 _nfs4_proc_getdeviceinfo(server, pdev),
6636 &exception);
6637 } while (exception.retry);
6638 return err;
6639}
6640EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6641
863a3c6c
AA		 6642static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6643{
6644 struct nfs4_layoutcommit_data *data = calldata;
6645 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6646 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6647
d9afbd1b
TM		 6648 nfs41_setup_sequence(session,
6649 &data->args.seq_args,
6650 &data->res.seq_res,
6651 task);
863a3c6c
AA		 6652}
6653
6654static void
6655nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6656{
6657 struct nfs4_layoutcommit_data *data = calldata;
6658 struct nfs_server *server = NFS_SERVER(data->args.inode);
6659
6ba7db34 6660 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6661 return;
6662
6663 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6664 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6665 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6666 case -NFS4ERR_BADLAYOUT: /* no layout */
6667 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6668 task->tk_status = 0;
e59d27e0
TM		 6669 break;
6670 case 0:
863a3c6c
AA		 6671 nfs_post_op_update_inode_force_wcc(data->args.inode,
6672 data->res.fattr);
e59d27e0
TM		 6673 break;
6674 default:
6675 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6676 rpc_restart_call_prepare(task);
6677 return;
6678 }
6679 }
863a3c6c
AA		 6680}
6681
6682static void nfs4_layoutcommit_release(void *calldata)
6683{
6684 struct nfs4_layoutcommit_data *data = calldata;
6685
db29c089 6686 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6687 put_rpccred(data->cred);
6688 kfree(data);
6689}
6690
6691static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6692 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6693 .rpc_call_done = nfs4_layoutcommit_done,
6694 .rpc_release = nfs4_layoutcommit_release,
6695};
6696
6697int
ef311537 6698nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6699{
6700 struct rpc_message msg = {
6701 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6702 .rpc_argp = &data->args,
6703 .rpc_resp = &data->res,
6704 .rpc_cred = data->cred,
6705 };
6706 struct rpc_task_setup task_setup_data = {
6707 .task = &data->task,
6708 .rpc_client = NFS_CLIENT(data->args.inode),
6709 .rpc_message = &msg,
6710 .callback_ops = &nfs4_layoutcommit_ops,
6711 .callback_data = data,
6712 .flags = RPC_TASK_ASYNC,
6713 };
6714 struct rpc_task *task;
6715 int status = 0;
6716
6717 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6718 "lbw: %llu inode %lu\n",
6719 data->task.tk_pid, sync,
6720 data->args.lastbytewritten,
6721 data->args.inode->i_ino);
6722
9d12b216 6723 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6724 task = rpc_run_task(&task_setup_data);
6725 if (IS_ERR(task))
6726 return PTR_ERR(task);
ef311537 6727 if (sync == false)
863a3c6c
AA		 6728 goto out;
6729 status = nfs4_wait_for_completion_rpc_task(task);
6730 if (status != 0)
6731 goto out;
6732 status = task->tk_status;
6733out:
6734 dprintk("%s: status %d\n", __func__, status);
6735 rpc_put_task(task);
6736 return status;
6737}
fca78d6d
BS		 6738
6739static int
6740_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6741 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6742{
6743 struct nfs41_secinfo_no_name_args args = {
6744 .style = SECINFO_STYLE_CURRENT_FH,
6745 };
6746 struct nfs4_secinfo_res res = {
6747 .flavors = flavors,
6748 };
6749 struct rpc_message msg = {
6750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6751 .rpc_argp = &args,
6752 .rpc_resp = &res,
6753 };
6754 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6755}
6756
6757static int
6758nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6759 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6760{
6761 struct nfs4_exception exception = { };
6762 int err;
6763 do {
6764 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6765 switch (err) {
6766 case 0:
6767 case -NFS4ERR_WRONGSEC:
6768 case -NFS4ERR_NOTSUPP:
05e9cfb4 6769 goto out;
fca78d6d
BS		 6770 default:
6771 err = nfs4_handle_exception(server, err, &exception);
6772 }
6773 } while (exception.retry);
05e9cfb4 6774out:
fca78d6d
BS		 6775 return err;
6776}
6777
6778static int
6779nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6780 struct nfs_fsinfo *info)
6781{
6782 int err;
6783 struct page *page;
6784 rpc_authflavor_t flavor;
6785 struct nfs4_secinfo_flavors *flavors;
6786
6787 page = alloc_page(GFP_KERNEL);
6788 if (!page) {
6789 err = -ENOMEM;
6790 goto out;
6791 }
6792
6793 flavors = page_address(page);
6794 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6795
6796 /*
6797 * Fall back on "guess and check" method if
6798 * the server doesn't support SECINFO_NO_NAME
6799 */
6800 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6801 err = nfs4_find_root_sec(server, fhandle, info);
6802 goto out_freepage;
6803 }
6804 if (err)
6805 goto out_freepage;
6806
6807 flavor = nfs_find_best_sec(flavors);
6808 if (err == 0)
6809 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6810
6811out_freepage:
6812 put_page(page);
6813 if (err == -EACCES)
6814 return -EPERM;
6815out:
6816 return err;
6817}
1cab0652
BS		 6818
6819static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6820{
6821 int status;
6822 struct nfs41_test_stateid_args args = {
1cab0652 6823 .stateid = stateid,
7d974794
BS		 6824 };
6825 struct nfs41_test_stateid_res res;
6826 struct rpc_message msg = {
6827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6828 .rpc_argp = &args,
6829 .rpc_resp = &res,
6830 };
1cab0652 6831
38527b15 6832 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6833 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6834 nfs4_set_sequence_privileged(&args.seq_args);
6835 status = nfs4_call_sync_sequence(server->client, server, &msg,
6836 &args.seq_args, &res.seq_res);
38527b15
CL		 6837 if (status != NFS_OK) {
6838 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6839 return status;
38527b15
CL		 6840 }
6841 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6842 return -res.status;
7d974794
BS		 6843}
6844
38527b15
CL		 6845/**
6846 * nfs41_test_stateid - perform a TEST_STATEID operation
6847 *
6848 * @server: server / transport on which to perform the operation
6849 * @stateid: state ID to test
6850 *
6851 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6852 * Otherwise a negative NFS4ERR value is returned if the operation
6853 * failed or the state ID is not currently valid.
6854 */
1cab0652 6855static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6856{
6857 struct nfs4_exception exception = { };
6858 int err;
6859 do {
377e507d
CL		 6860 err = _nfs41_test_stateid(server, stateid);
6861 if (err != -NFS4ERR_DELAY)
6862 break;
6863 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6864 } while (exception.retry);
6865 return err;
6866}
9aeda35f 6867
7c1d5fae
TM		 6868struct nfs_free_stateid_data {
6869 struct nfs_server *server;
6870 struct nfs41_free_stateid_args args;
9aeda35f 6871 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 6872};
6873
6874static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
6875{
6876 struct nfs_free_stateid_data *data = calldata;
6877 nfs41_setup_sequence(nfs4_get_session(data->server),
6878 &data->args.seq_args,
6879 &data->res.seq_res,
6880 task);
6881}
6882
6883static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
6884{
6885 struct nfs_free_stateid_data *data = calldata;
6886
6887 nfs41_sequence_done(task, &data->res.seq_res);
6888
6889 switch (task->tk_status) {
6890 case -NFS4ERR_DELAY:
6891 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
6892 rpc_restart_call_prepare(task);
6893 }
6894}
6895
6896static void nfs41_free_stateid_release(void *calldata)
6897{
6898 kfree(calldata);
6899}
6900
6901const struct rpc_call_ops nfs41_free_stateid_ops = {
6902 .rpc_call_prepare = nfs41_free_stateid_prepare,
6903 .rpc_call_done = nfs41_free_stateid_done,
6904 .rpc_release = nfs41_free_stateid_release,
6905};
6906
6907static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
6908 nfs4_stateid *stateid,
6909 bool privileged)
6910{
9aeda35f
BS		 6911 struct rpc_message msg = {
6912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9aeda35f 6913 };
7c1d5fae
TM		 6914 struct rpc_task_setup task_setup = {
6915 .rpc_client = server->client,
6916 .rpc_message = &msg,
6917 .callback_ops = &nfs41_free_stateid_ops,
6918 .flags = RPC_TASK_ASYNC,
6919 };
6920 struct nfs_free_stateid_data *data;
9aeda35f 6921
38527b15 6922 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 6923 data = kmalloc(sizeof(*data), GFP_NOFS);
6924 if (!data)
6925 return ERR_PTR(-ENOMEM);
6926 data->server = server;
6927 nfs4_stateid_copy(&data->args.stateid, stateid);
6928
6929 task_setup.callback_data = data;
6930
6931 msg.rpc_argp = &data->args;
6932 msg.rpc_resp = &data->res;
6933 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6934 if (privileged)
6935 nfs4_set_sequence_privileged(&data->args.seq_args);
6936
6937 return rpc_run_task(&task_setup);
9aeda35f
BS		 6938}
6939
38527b15
CL		 6940/**
6941 * nfs41_free_stateid - perform a FREE_STATEID operation
6942 *
6943 * @server: server / transport on which to perform the operation
6944 * @stateid: state ID to release
6945 *
6946 * Returns NFS_OK if the server freed "stateid". Otherwise a
6947 * negative NFS4ERR value is returned.
6948 */
1cab0652 6949static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6950{
7c1d5fae
TM		 6951 struct rpc_task *task;
6952 int ret;
6953
6954 task = _nfs41_free_stateid(server, stateid, true);
6955 if (IS_ERR(task))
6956 return PTR_ERR(task);
6957 ret = rpc_wait_for_completion_task(task);
6958 if (!ret)
6959 ret = task->tk_status;
6960 rpc_put_task(task);
6961 return ret;
9aeda35f 6962}
36281caa 6963
c8b2d0bf
TM		 6964static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
6965{
6966 struct rpc_task *task;
6967
6968 task = _nfs41_free_stateid(server, &lsp->ls_stateid, false);
6969 nfs4_free_lock_state(server, lsp);
6970 if (IS_ERR(task))
6971 return PTR_ERR(task);
6972 rpc_put_task(task);
6973 return 0;
6974}
6975
36281caa
TM		 6976static bool nfs41_match_stateid(const nfs4_stateid *s1,
6977 const nfs4_stateid *s2)
6978{
2d2f24ad 6979 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6980 return false;
6981
2d2f24ad 6982 if (s1->seqid == s2->seqid)
36281caa 6983 return true;
2d2f24ad 6984 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6985 return true;
6986
6987 return false;
6988}
6989
557134a3
AA		 6990#endif /* CONFIG_NFS_V4_1 */
6991
36281caa
TM		 6992static bool nfs4_match_stateid(const nfs4_stateid *s1,
6993 const nfs4_stateid *s2)
6994{
f597c537 6995 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6996}
6997
6998
17280175 6999static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7000 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7001 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7002 .recover_open = nfs4_open_reclaim,
7003 .recover_lock = nfs4_lock_reclaim,
591d71cb 7004 .establish_clid = nfs4_init_clientid,
90a16617 7005 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 7006 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7007};
7008
591d71cb 7009#if defined(CONFIG_NFS_V4_1)
17280175 7010static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7011 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7012 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7013 .recover_open = nfs4_open_reclaim,
7014 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7015 .establish_clid = nfs41_init_clientid,
b4b82607 7016 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 7017 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7018 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7019};
7020#endif /* CONFIG_NFS_V4_1 */
7021
17280175 7022static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7023 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7024 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7025 .recover_open = nfs4_open_expired,
7026 .recover_lock = nfs4_lock_expired,
7027 .establish_clid = nfs4_init_clientid,
90a16617 7028 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 7029};
7030
7031#if defined(CONFIG_NFS_V4_1)
17280175 7032static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7033 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7034 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7035 .recover_open = nfs41_open_expired,
7036 .recover_lock = nfs41_lock_expired,
4d643d1d 7037 .establish_clid = nfs41_init_clientid,
b4b82607 7038 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 7039};
591d71cb 7040#endif /* CONFIG_NFS_V4_1 */
1da177e4 7041
17280175 7042static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7043 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7044 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7045 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7046};
7047
7048#if defined(CONFIG_NFS_V4_1)
17280175 7049static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7050 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7051 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7052 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7053};
7054#endif
7055
97dc1359
TM		 7056static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7057 .minor_version = 0,
39c6daae
TM		 7058 .init_caps = NFS_CAP_READDIRPLUS
7059 | NFS_CAP_ATOMIC_OPEN
7060 | NFS_CAP_CHANGE_ATTR
7061 | NFS_CAP_POSIX_LOCK,
97dc1359 7062 .call_sync = _nfs4_call_sync,
36281caa 7063 .match_stateid = nfs4_match_stateid,
fca78d6d 7064 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7065 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7066 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7067 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7068 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7069};
7070
7071#if defined(CONFIG_NFS_V4_1)
7072static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7073 .minor_version = 1,
39c6daae
TM		 7074 .init_caps = NFS_CAP_READDIRPLUS
7075 | NFS_CAP_ATOMIC_OPEN
7076 | NFS_CAP_CHANGE_ATTR
3b66486c 7077 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7078 | NFS_CAP_STATEID_NFSV41
7079 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7080 .call_sync = nfs4_call_sync_sequence,
36281caa 7081 .match_stateid = nfs41_match_stateid,
fca78d6d 7082 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7083 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7084 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7085 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7086 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7087};
7088#endif
7089
42c2c424
SD		 7090#if defined(CONFIG_NFS_V4_2)
7091static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7092 .minor_version = 2,
7093 .call_sync = nfs4_call_sync_sequence,
7094 .match_stateid = nfs41_match_stateid,
7095 .find_root_sec = nfs41_find_root_sec,
7096 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7097 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7098 .state_renewal_ops = &nfs41_state_renewal_ops,
7099};
7100#endif
7101
97dc1359
TM		 7102const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7103 [0] = &nfs_v4_0_minor_ops,
7104#if defined(CONFIG_NFS_V4_1)
7105 [1] = &nfs_v4_1_minor_ops,
7106#endif
42c2c424
SD		 7107#if defined(CONFIG_NFS_V4_2)
7108 [2] = &nfs_v4_2_minor_ops,
7109#endif
97dc1359
TM		 7110};
7111
73a79706
BS		 7112const struct inode_operations nfs4_dir_inode_operations = {
7113 .create = nfs_create,
7114 .lookup = nfs_lookup,
7115 .atomic_open = nfs_atomic_open,
7116 .link = nfs_link,
7117 .unlink = nfs_unlink,
7118 .symlink = nfs_symlink,
7119 .mkdir = nfs_mkdir,
7120 .rmdir = nfs_rmdir,
7121 .mknod = nfs_mknod,
7122 .rename = nfs_rename,
7123 .permission = nfs_permission,
7124 .getattr = nfs_getattr,
7125 .setattr = nfs_setattr,
7126 .getxattr = generic_getxattr,
7127 .setxattr = generic_setxattr,
7128 .listxattr = generic_listxattr,
7129 .removexattr = generic_removexattr,
7130};
7131
92e1d5be 7132static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7133 .permission = nfs_permission,
7134 .getattr = nfs_getattr,
7135 .setattr = nfs_setattr,
64c2ce8b
AK		 7136 .getxattr = generic_getxattr,
7137 .setxattr = generic_setxattr,
7138 .listxattr = generic_listxattr,
7139 .removexattr = generic_removexattr,
6b3b5496
BF		 7140};
7141
509de811 7142const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7143 .version = 4, /* protocol version */
7144 .dentry_ops = &nfs4_dentry_operations,
7145 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7146 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7147 .file_ops = &nfs4_file_operations,
1da177e4 7148 .getroot = nfs4_proc_get_root,
281cad46 7149 .submount = nfs4_submount,
ff9099f2 7150 .try_mount = nfs4_try_mount,
1da177e4
LT		 7151 .getattr = nfs4_proc_getattr,
7152 .setattr = nfs4_proc_setattr,
7153 .lookup = nfs4_proc_lookup,
7154 .access = nfs4_proc_access,
7155 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7156 .create = nfs4_proc_create,
7157 .remove = nfs4_proc_remove,
7158 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7159 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7160 .unlink_done = nfs4_proc_unlink_done,
7161 .rename = nfs4_proc_rename,
d3d4152a 7162 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7163 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7164 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7165 .link = nfs4_proc_link,
7166 .symlink = nfs4_proc_symlink,
7167 .mkdir = nfs4_proc_mkdir,
7168 .rmdir = nfs4_proc_remove,
7169 .readdir = nfs4_proc_readdir,
7170 .mknod = nfs4_proc_mknod,
7171 .statfs = nfs4_proc_statfs,
7172 .fsinfo = nfs4_proc_fsinfo,
7173 .pathconf = nfs4_proc_pathconf,
e9326dca 7174 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7175 .decode_dirent = nfs4_decode_dirent,
7176 .read_setup = nfs4_proc_read_setup,
1abb5088 7177 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7178 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7179 .read_done = nfs4_read_done,
1da177e4 7180 .write_setup = nfs4_proc_write_setup,
57208fa7 7181 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7182 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7183 .write_done = nfs4_write_done,
1da177e4 7184 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7185 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7186 .commit_done = nfs4_commit_done,
1da177e4 7187 .lock = nfs4_proc_lock,
e50a1c2e 7188 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7189 .close_context = nfs4_close_context,
2b484297 7190 .open_context = nfs4_atomic_open,
011e2a7f 7191 .have_delegation = nfs4_have_delegation,
57ec14c5 7192 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7193 .alloc_client = nfs4_alloc_client,
45a52a02 7194 .init_client = nfs4_init_client,
cdb7eced 7195 .free_client = nfs4_free_client,
1179acc6
BS		 7196 .create_server = nfs4_create_server,
7197 .clone_server = nfs_clone_server,
1da177e4
LT		 7198};
7199
64c2ce8b
AK		 7200static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7201 .prefix = XATTR_NAME_NFSV4_ACL,
7202 .list = nfs4_xattr_list_nfs4_acl,
7203 .get = nfs4_xattr_get_nfs4_acl,
7204 .set = nfs4_xattr_set_nfs4_acl,
7205};
7206
7207const struct xattr_handler *nfs4_xattr_handlers[] = {
7208 &nfs4_xattr_nfs4_acl_handler,
7209 NULL
7210};
7211
1da177e4
LT		 7212/*
7213 * Local variables:
7214 * c-basic-offset: 8
7215 * End:
7216 */
Linux 6.x block layer and io_uring tree(s)